JP2022169492A - Thermal vibration power generation device, power generation method, and thermal vibration power generation system - Google Patents

Abstract

To provide a thermal vibration power generation device and the like capable of generating high voltage.SOLUTION: A thermal vibration power generation device 1 is provided in a heat source 2. The thermal vibration power generation device 1 includes: a power generation member 70 having a frame 20 having a free end portion F1 and a fixed end portion F2, and a power generation unit 30 having a magnetostrictive element 32 and provided on the frame 20; a temperature-sensitive magnetic member 50 made of a temperature-sensitive magnetic material and provided at the free end F1 of the frame 20; and a first magnet 10. The state of the thermal vibration power generation device 1 includes a first state in which the temperature-sensitive magnetic member 50 gives and receives heat, and a second state in which the free end portion F1 freely vibrates.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a thermal vibration power generation device, a power generation method, and a thermal vibration power generation system.

Conventionally, the development of technology for converting vibration into electric power has been actively carried out. As one of such technologies, a thermal vibration power generation device using heat and vibration is known. Such a thermal vibration power generation device is attached to a mechanical device such as a production machine or a machine tool together with various sensors such as a temperature sensor, a flow rate sensor, a pressure sensor, and a current sensor, and detects an abnormality (for example, high temperature) of the mechanical device. It can be used for detection.

For example, Non-Patent Document 1 discloses a thermal vibration power generation device that includes a cantilever, a NiMnGa film and a pickup coil provided on the cantilever, and a magnet that heats the NiMnGa film.

Ｍａｒｃｅｌ Ｇｕｅｌｔｉｇ， Ｆｒａｎｋ Ｗｅｎｄｌｅｒ， Ｈｉｎｎｅｒｋ Ｏｓｓｍｅｒ， Ｍａｋｏｔｏ Ｏｈｔｓｕｋａ， Ｈｉｒｏｙｕｋｉ Ｍｉｋｉ，Ｔｏｓｈｉｙｕｋｉ Ｔａｋａｇｉ， ａｎｄ Ｍａｎｆｒｅｄ Ｋｏｈｌ，“Ｈｉｇｈ－Ｐｅｒｆｏｒｍａｎｃｅ Ｔｈｅｒｍｏｍａｇｎｅｔｉｃ Ｇｅｎｅｒａｔｏｒｓ Ｂａｓｅｄ ｏｎ Ｈｅｕｓｌｅｒ Ａｌｌｏｙ Ｆｉｌｍｓ”Ａｄｖ． Energy Mater. 2016, 1601879.

However, it is difficult for the thermal vibration power generation device disclosed in Non-Patent Document 1 to generate a high voltage.

An object of the present invention is to solve the above-described problems, and to provide a thermal vibration power generation device or the like capable of generating a high voltage.

A thermal vibration power generation device according to an aspect of the present invention is a thermal vibration power generation device provided in a heat source, comprising: a frame having a free end and a fixed end; and a power generation section having a magnetostrictive element and provided on the frame. a temperature-sensitive magnetic member made of a temperature-sensitive magnetic material and provided at the free end of the frame; and a first magnet, wherein the state of the thermal vibration power generation device is the It includes a first state in which the temperature-sensitive magnetic member exchanges heat, and a second state in which the free end vibrates freely.

Further, a power generation method according to an aspect of the present invention is a power generation method using a thermal vibration power generation device provided at a heat source, wherein the thermal vibration power generation device includes a frame having a free end and a fixed end, and a magnetostrictive element. a power generation unit provided on the frame; a temperature-sensitive magnetic member made of a temperature-sensitive magnetic material and provided at the free end of the frame; and a first magnet, wherein the power generation method comprises , a first magnetization change step in which the temperature-sensitive magnetic member exchanges heat to cause one of an increase and a decrease in the magnetization of the temperature-sensitive magnetic member, and free vibration of the free end. a power generation step in which the power generation unit generates power; and a second magnetization change step in which the other of the increase and the decrease in the magnetization of the temperature-sensitive magnetic member occurs.

A thermal vibration power generation system according to an aspect of the present invention includes a heat source and the thermal vibration power generation device described above.

ADVANTAGE OF THE INVENTION According to this invention, the thermal vibration electric power generation device etc. which can generate a high voltage are realizable.

FIG. 1 is a side view of a thermal vibration power generation system according to an embodiment. FIG. 2 is a diagram showing the relationship between the temperature and magnetization of the NiMnIn alloy forming the temperature-sensitive magnetic member according to the embodiment. FIG. 3 is a flowchart of an operation example of the thermal vibration power generation device according to the embodiment. FIG. 4 is a side view explaining an operation example of the thermal vibration power generation device according to the embodiment. FIG. 5 is another side view explaining an operation example of the thermal vibration power generation device according to the embodiment. FIG. 6 is another side view explaining an operation example of the thermal vibration power generation device according to the embodiment. FIG. 7 is a diagram explaining power generation by the power generation unit according to the embodiment. FIG. 8 is a diagram explaining details of power generation by the power generation unit according to the embodiment. 9 is a side view of a thermal vibration power generation system according to Modification 1. FIG. FIG. 10 is a diagram showing the relationship between the temperature and magnetization of the NiCoMnIn alloy that constitutes the temperature-sensitive magnetic member according to Modification 1. In FIG. 11 is a side view for explaining the positional relationship between the high-temperature heat source and the connecting plate according to Modification 1. FIG. 12 is a side view of a thermal vibration power generation system according to Modification 2. FIG. 13 is a side view of a thermal vibration power generation system according to Modification 3. FIG. 14 is a side view of a thermal vibration power generation system according to Modification 4. FIG. 15 is a side view of a thermal vibration power generation system according to Modification 5. FIG. FIG. 16 is a diagram showing the relationship between the temperature and the magnetization of the NiMnCoSn alloy that constitutes the temperature-sensitive magnetic member according to Modification 5. As shown in FIG. 17 is a side view for explaining the positional relationship between the low-temperature heat source and the connecting member according to Modification 5. FIG. 18 is a side view of a thermal vibration power generation system according to Modification 6. FIG. 19 is a front view illustrating two first magnets in a thermal vibration power generation system according to Modification 6. FIG. 20 is a side view showing a state in which a temperature-sensitive magnetic member and a magnetic member are in contact with each other according to Modification 6. FIG. FIG. 21 is a diagram showing a thermal vibration power generation device according to modification 6 when the magnetization of the temperature-sensitive magnetic member is low. FIG. 22 is a diagram showing a thermal vibration power generation device according to modification 6 in which the magnetization of the temperature-sensitive magnetic member is stronger than in the case shown in FIG. 23 is a flowchart of an operation example of the thermal vibration power generation device according to Modification 6. FIG. 24 is a side view for explaining an operation example of the thermal vibration power generation device according to Modification 6. FIG. FIG. 25 is another side view for explaining the operation example of the thermal vibration power generation device according to Modification 6. FIG. 26 is a plan view of the periphery of a frame provided in a thermal vibration power generation device according to an example of Modification 6. FIG. 27 is a front view of the periphery of a frame included in a thermal vibration power generation device according to an example of modification 6. FIG. 28 is a side view of the periphery of the frame included in the thermal vibration power generation device according to the example of modification 6. FIG. FIG. 29 is a diagram showing temporal changes in temperature of each of the magnetic member and the temperature-sensitive magnetic member according to the example of the sixth modification. FIG. 30 is a diagram showing temporal changes in the voltage generated by the thermal vibration power generation device according to the example of modification 6. FIG. FIG. 31 is a diagram showing temporal changes in the generated voltage at the first time shown in FIG. FIG. 32 is a diagram showing temporal changes in the generated voltage at the second time shown in FIG. 33 is a side view of a thermal vibration power generation system according to Modification 7. FIG. 34 is a plan view of the periphery of a connecting member according to Modification 7. FIG. FIG. 35 is a diagram showing the relationship between temperature and magnetization of a temperature-sensitive magnetic material that constitutes a temperature-sensitive magnetic member according to another embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that the embodiments described below are all comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are examples and are not intended to limit the present invention. Further, among the constituent elements in the following embodiments, constituent elements not described in independent claims will be described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in each figure, the same code|symbol is attached|subjected with respect to substantially the same structure, and the overlapping description may be abbreviate|omitted or simplified.

In addition, in this specification and drawings, x-axis, y-axis and z-axis indicate three axes of a three-dimensional orthogonal coordinate system. In each figure, the x-axis direction and the y-axis direction are directions orthogonal to each other, and the z-axis direction is a direction perpendicular to the x-axis and the y-axis.

(Embodiment)
[Configuration of thermal vibration power generation system]
A configuration example of the thermal vibration power generation system 100 according to the present embodiment will be described.

FIG. 1 is a side view of a thermal vibration power generation system 100 according to this embodiment.

A thermal vibration power generation system 100 according to the present embodiment is a power generation system including a thermal vibration power generation device 1 and a heat source 2 . In this embodiment, the thermal vibration power generation system 100 is installed and used in an environment of normal temperature TR, and the temperature of the heat source 2 is a temperature TH which is higher than the normal temperature TR. Here, as an example, the normal temperature TR is 20°C and the temperature TH is 80°C. The thermal vibration power generation system 100 is a system that generates power using the temperature difference between the temperature TH and the room temperature TR.

The heat source 2 is, for example, a mechanical device. The mechanical device may be a production machine or machine tool, as described in the background art. Note that the heat source 2 is not limited to the above, and may be any object that has a temperature difference from the room temperature TR, such as an asphalt-paved road.

The thermal vibration power generation device 1 according to the present embodiment is provided in the heat source 2 and is a device that generates power using the temperature difference between the temperature TH and the room temperature TR. be.

The thermal vibration power generation device 1 includes a first magnet 10, a power generation member 70 having a frame 20 and a power generation section 30, a heat insulation member (first heat insulation member 40), a temperature-sensitive magnetic member 50, and a second magnet 60. Prepare. The power generation unit 30 includes a coil 31, a magnetostrictive element 32, and a power generation magnet 33, and is an element that generates power by vibration.

In the present embodiment, the shape of the magnetostrictive element 32 included in the power generation section 30 is a flat plate shape, and the plane of the magnetostrictive element 32 is parallel to the plane when the thermal vibration power generation device 1 is not vibrating. Let the plane be the xy plane.

Although the first magnet 10 is a magnet provided in the heat source 2 in the present embodiment, the location where the first magnet 10 is provided is not limited to this. More specifically, the first magnet 10 is attached to the heat source 2 via a high thermal conductivity member 11 .

It should be noted that the high thermal conductivity member 11 is preferably made of a material exhibiting high thermal conductivity. It is not limited to these materials. The high thermal conductivity member 11 is provided on the z-axis positive side of the heat source 2 , and the first magnet 10 is provided on the z-axis positive side of the high thermal conductivity member 11 .

Also, the first magnet 10 is, for example, a permanent magnet made of neodymium or the like, but is not limited to this. Since the first magnet 10 is attached to the heat source 2 via the high thermal conductivity member 11 , the heat of the heat source 2 is transferred to the first magnet 10 . Therefore, the temperature of the first magnet 10 tends to be closer to the temperature TH of the heat source 2 than to the room temperature TR, and is the same temperature TH (80° C.) as the heat source 2 here.

The frame 20 is a member having a frame body portion 21 and connecting members 22 .

The frame 20 also has a free end portion F1, a bent portion B and a fixed end portion F2. In this embodiment, the connecting member 22 has a free end portion F1, and the frame body portion 21 has a bent portion B and a fixed end portion F2. The shape of the frame 20 is a member having a U shape, and more specifically, the shape of the frame main body 21 has a U shape in a side view.

Further, the frame body portion 21 is formed by bending one plate-shaped member so as to have a U-shape. The frame 20 is fixed and supported in a so-called cantilever state such that one end of the frame 20 is a fixed end F2 and the other end is a free end F1 with the bent portion B interposed therebetween. In addition, in the thermal vibration power generation device 1, the fixed end portion F2 of the frame body portion 21 is fixed to the first heat insulating member 40 and installed.

When the free end portion F1 freely vibrates, the frame 20 itself also vibrates. At this time, the state (open state) in which the frame 20 is deformed so that the free end portion F1 and the fixed end portion F2 are opened, and the state in which the frame 20 is deformed so that the free end portion F1 and the fixed end portion F2 are closed. (closed state) is repeated. In other words, the state where the gap between the free end portion F1 and the fixed end portion F2 is large (open state) and the state where the gap is small (closed state) are repeated.

The frame main body 21 is provided with the magnetostrictive element 32 and the power generating magnet 33 of the power generation section 30, and the frame main body 21 is a member that supports these components. The material forming the frame main body 21 is not particularly limited, but for example, it may be made of a material having elasticity. Further, the material forming the frame main body 21 may be made of, for example, a material containing iron. The frame main body 21 is made of, for example, spring steel (bainite steel), cold-rolled steel strip (SPCC: Steel Plate Cold Commercial), or the like.

The U-shaped frame main body 21 has, as shown in FIG. .

The connecting member 22 is a member attached to the first outer surface 213 of the frame body portion 21 . In the present embodiment, the connecting member 22 is a plate-shaped member having a first surface 221 facing the heat source 2 side and a second surface 222 facing the first surface 221 .

Moreover, the connecting member 22 is not limited to a plate shape, and may have another shape such as a rod shape. The connecting member 22 is attached to the frame main body 21 so that the first surface 221 and the first outer side surface 213 are in contact with each other. may

As with the frame body portion 21, the material forming the connecting member 22 is made of a material having rigidity and elasticity. In other words, the material forming the connecting member 22 is preferably made of, for example, a material containing iron. The connecting member 22 is made of, for example, spring steel, cold-rolled steel strip, or the like. Alternatively, the connecting member 22 may be made of phosphor bronze. This allows the connecting member 22 to bend when the frame 20 vibrates.

Next, the power generation unit 30 will be described.

The magnetostrictive element 32 included in the power generation section 30 is a member attached to the first outer surface 213 included in the frame 20 . As described above, the shape of the magnetostrictive element 32 is not particularly limited, but it is a flat plate shape. In the present embodiment, the xy plane is the plane of the magnetostrictive element 32 attached to the frame 20 and is parallel to the plane when the thermal vibration power generation device 1 is not vibrating.

The magnetostrictive element 32 is made of a magnetostrictive material. The magnetostrictive material is, for example, an iron-gallium alloy, but is not limited to this, and may be, for example, an iron-aluminum alloy or other materials.

The magnetostrictive element 32 is an element that deforms due to vibration. In this embodiment, the magnetostrictive element 32 is attached to the frame 20, so that the magnetostrictive element 32 is deformed when the frame 20 vibrates.

The coil 31 is wound around the first inner surface 211 and the first outer surface 213 of the frame main body 21 and the magnetostrictive element 32 . The coil 31 generates a voltage in proportion to the temporal change of the lines of magnetic force passing through the magnetostrictive element 32 according to the law of electromagnetic induction.

The material of the coil 31 is, for example, copper, but is not particularly limited. Also, by changing the number of turns of the coil 31, the magnitude of the voltage can be adjusted.

The power generating magnet 33 is provided on the second inner side surface 212 of the frame body portion 21 . The power generating magnet 33 is, for example, a permanent magnet, but is not limited to this and may be an electromagnet. Magnetic lines of force from the power generating magnet 33 pass through the magnetostrictive element 32 .

As described above, when the frame 20 vibrates repeatedly between the open state and the closed state, the magnetostrictive element 32 attached to the frame main body 21 is alternately subjected to tensile stress and compressive stress corresponding to the bending moment. The magnetostrictive element 32 expands or contracts and deforms.

Thus, when the frame 20 vibrates, the magnetic lines of force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and the magnetic flux density penetrating the coil 31 also increases or decreases. An induced voltage (or an induced current) is generated in the coil 31 due to the temporal change in the magnetic flux density.

Thus, the power generation section 30 can generate power by vibration of the frame 20 .

Next, the heat insulating member will be explained. In addition, in the present embodiment, the first heat insulating member 40 is used as the heat insulating member.

The first heat insulating member 40 is a member provided between the fixed end portion F<b>2 and the heat source 2 . Moreover, the first heat insulating member 40 is fixed to the heat source 2 and installed. Therefore, it can be said that the fixed end portion F<b>2 of the frame main body portion 21 is fixed and attached to the heat source 2 via the first heat insulating member 40 . As shown in FIG. 1 , the first heat insulating member 40 is provided on the z-axis positive side of the heat source 2 , and the frame 20 is provided on the z-axis positive side of the first heat insulating member 40 .

The shape of the first heat insulating member 40 according to the present embodiment is a flat plate shape, but is not limited to this. , and a shape that can be inserted between them.

The first heat insulating member 40 is a member for suppressing transfer of heat between the heat source 2 and the thermal vibration power generation device 1 . In the present embodiment, the first heat insulating member 40 is a member for suppressing heat transfer from the heat source 2 having a higher temperature to the thermal vibration power generation device 1 (more specifically, the frame main body 21). is.

The first heat insulating member 40 is made of a heat insulating material. The first heat insulating member 40 is made of a material that has a thermal conductivity lower than that of the material forming the frame main body 21 and has a rigidity capable of supporting the frame 20 (frame main body 21). I hope you are. A material constituting the first heat insulating member 40 can be, for example, a resin, and more specifically, bakelite (phenol resin), but is not limited to this.

Furthermore, the temperature-sensitive magnetic member 50 will be described.

The temperature-sensitive magnetic member 50 is a member made of a temperature-sensitive magnetic material. Here, the shape of the temperature-sensitive magnetic member 50 is a flat plate shape, but is not limited to this. A temperature-sensitive magnetic material is a material whose magnetization depends on temperature.

More specifically, a temperature-sensitive magnetic material is a material whose magnetic properties change to ferromagnetism or paramagnetism depending on temperature. Examples of the temperature-sensitive magnetic material include a nickel-manganese-indium alloy (NiMnIn alloy), a nickel-cobalt-manganese-indium alloy (NiCoMnIn alloy), a nickel-cobalt-manganese-aluminum alloy (NiCoMnAl alloy), a nickel-manganese-cobalt-tin alloy (NiMnCoSn alloy), and the like. There are, but not limited to, these.

Also, the temperature-sensitive magnetic material is a material called a magnetic transformation alloy or a magnetic phase transformation alloy. In this embodiment, the temperature-sensitive magnetic material is a NiMnIn alloy. Further, the relationship between the temperature and magnetization of the temperature-sensitive magnetic member 50 made of NiMnIn alloy will be described with reference to FIG.

FIG. 2 is a diagram showing the relationship between the temperature and magnetization of the NiMnIn alloy forming the temperature-sensitive magnetic member 50 according to the present embodiment. In the region of about -100°C to about 0°C, the magnetization decreases smoothly with increasing temperature. In the region of about 0° C. to about 10° C., the magnetization sharply increases as the temperature rises. In this region, martensitic transformation occurs in the NiMnIn alloy, resulting in a rapid change in magnetization. In the region of about 10° C. to about 70° C., magnetization decreases with increasing temperature. It is estimated that the NiMnIn alloy according to this embodiment becomes paramagnetic at a temperature of about 70° C. or higher. Here, the Curie temperature Tc of the NiMnIn alloy according to this embodiment is defined as 70°C.

The temperature-sensitive magnetic member 50 is provided at the free end portion F1 of the frame 20 (more specifically, the connecting member 22). In the present embodiment, the temperature-sensitive magnetic member 50 is provided on the first surface 221 on the heat source 2 side, that is, on the z-axis negative side of the connecting member 22 at the free end portion F1.

Furthermore, the positional relationship between the temperature-sensitive magnetic member 50 and the first magnet 10 will be described.

As shown in FIG. 2, since the magnetization of the temperature-sensitive magnetic member 50 changes with temperature, the strength of the attractive force generated between the temperature-sensitive magnetic member 50 and the first magnet 10 changes. When the attractive force between the temperature-sensitive magnetic member 50 and the first magnet 10 is strong, the temperature-sensitive magnetic member 50 and the first magnet 10 are in contact with each other. should be placed.

More specifically, when the magnetization of the temperature-sensitive magnetic member 50 is high, a strong attractive force is generated between the temperature-sensitive magnetic member 50 and the first magnet 10, and this attractive force causes the frame 20 (more specifically, The temperature-sensitive magnetic member 50 and the first magnet 10 are preferably arranged so that the temperature-sensitive magnetic member 50 and the first magnet 10 are in contact with each other by deforming the frame main body 21). For example, as shown in FIG. 1 , the first magnet 10 may be arranged on the negative side of the z-axis with respect to the temperature-sensitive magnetic member 50 . When the magnetization of the temperature-sensitive magnetic member 50 is low, a strong attractive force is not generated between the temperature-sensitive magnetic member 50 and the first magnet 10. Therefore, as shown in FIG. It is not in contact with the first magnet 10.

Further, the connecting member 22 described above may play a role of adjusting the positional relationship between the first magnet 10 and the temperature-sensitive magnetic member 50 attached to the free end portion F1 of the connecting member 22 . In other words, the connecting member 22 may play a role of adjusting the gap and angle between the temperature-sensitive magnetic member 50 and the first magnet 10 . In other words, the size and shape of the connecting member 22 should be selected so that the temperature-sensitive magnetic member 50 and the first magnet 10 are arranged in contact with each other when the attractive force is strong. Therefore, in the present embodiment, the connecting member 22 has a plate shape, but it is not limited to this.

The second magnet 60 is provided at the free end portion F1 of the frame 20 (more specifically, the connecting member 22). In this embodiment, the second magnet 60 is provided on the second surface 222 at the free end F1.

The second magnet 60 is, for example, a permanent magnet made of neodymium or the like, but is not limited to this. The second magnet 60 is installed so that an attractive force is generated between the first magnet 10 and the second magnet 60 .

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1 will be described with reference to FIGS. 3 to 6. FIG.

FIG. 3 is a flowchart of an operation example of the thermal vibration power generation device 1 according to this embodiment. 4 to 6 are side views for explaining an operation example of the thermal vibration power generation device 1 according to this embodiment.

First, the thermal vibration power generation device 1 is installed on the heat source 2 in an environment of normal temperature TR. At this time, as shown in FIG. 4, the temperature-sensitive magnetic member 50 contacts the first magnet 10 (S10). Under the environment of the room temperature TR, the temperature of the temperature-sensitive magnetic member 50 is also the room temperature TR, and as shown in FIG. 2, the magnetization of the temperature-sensitive magnetic member 50 is high. As a result, a strong attractive force is generated between the temperature-sensitive magnetic member 50 and the first magnet 10 , the frame main body portion 21 is deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other.

In addition, since the second magnet 60 is provided in the present embodiment, an attractive force is also generated between the first magnet 10 and the second magnet 60 . Therefore, the frame main body portion 21 is easily deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 are easily brought into contact with each other. This step S10 corresponds to the first contact step.

In addition, the first magnet 10 is attached to the heat source 2 exhibiting a temperature TH that is higher than the room temperature TR, via a high thermal conductivity member 11 . Therefore, here, the temperature of the first magnet 10 is also the temperature TH.

At step S<b>10 , the temperature-sensitive magnetic member 50 is in contact with the first magnet 10 . Therefore, heat is transferred from the first magnet 10 exhibiting a high temperature TH to the temperature-sensitive magnetic member 50, and the magnetization of the temperature-sensitive magnetic member 50 changes. That is, here, the temperature-sensitive magnetic member 50 gives and receives heat, thereby causing one of an increase and a decrease in the magnetization of the temperature-sensitive magnetic member 50 (S20). In the present embodiment, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50. magnetization is reduced. As the temperature of the temperature-sensitive magnetic member 50 rises from the room temperature TR to the temperature TH, the magnetization of the temperature-sensitive magnetic member 50 decreases, as indicated by the arrow A1 in FIG. This step S20 corresponds to the first magnetization changing step, more specifically, to the first magnetization decreasing step.

Here, the temperature TH (° C.) of the heat source 2 to which the first magnet 10 is attached preferably satisfies 0.8×Tc≦TH (° C.)≦2.0×Tc. Further, the temperature TH (° C.) preferably satisfies Tc≦TH (° C.)≦2.0×Tc, and may also satisfy Tc≦TH (° C.)≦1.2×Tc. Note that Tc indicates the Curie temperature Tc (° C.) of the temperature-sensitive magnetic material (NiMnIn alloy). Also, the lower limit of the temperature TH of the heat source 2 is not limited to Tc, and may be any temperature above which the magnetization of the temperature-sensitive magnetic member 50 disappears. Since the temperature TH of the heat source 2 is above, the temperature of the temperature-sensitive magnetic member 50 is likely to rise in step S20.

Further, in steps S10 and S20, the state of the thermal vibration power generation device 1 becomes the first state in which the temperature-sensitive magnetic member 50 gives and receives heat. More specifically, in steps S10 and S20, the state of the thermal vibration power generation device 1 is the first state in which the temperature-sensitive magnetic member 50 contacts the first magnet 10 to exchange heat with the first magnet 10. becomes.

Furthermore, in step S20, when the magnetization of the temperature-sensitive magnetic member 50 is sufficiently reduced, the attractive force between the temperature-sensitive magnetic member 50 and the first magnet 10 is weakened. As a result, as shown in FIG. 5, the free end portion F1 vibrates freely, and the power generation section 30 generates power (S30). More specifically, as shown in FIG. 5, the temperature-sensitive magnetic member 50 is separated from the first magnet 10 and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. In this case, when the free end portion F1 freely vibrates, the frame 20 also vibrates. In FIG. 5, an arrow D indicates the direction in which the free end portion F1 freely vibrates. As the frame 20 vibrates, the power generation unit 30 generates power due to the inverse magnetostriction effect as described above. This step S30 corresponds to the power generation step.

Thus, in step S30, the state of the thermal vibration power generation device 1 becomes the second state in which the free end portion F1 freely vibrates. In other words, the second state is also a state in which the temperature-sensitive magnetic member 50 freely vibrates and a state in which the frame 20 vibrates.

After step S<b>30 , the temperature-sensitive magnetic member 50 is sufficiently cooled under the environment of room temperature TR while being separated from the first magnet 10 . In other words, the temperature-sensitive magnetic member 50 radiates the heat transferred from the heat source 2 in step S20. Therefore, the temperature of the temperature-sensitive magnetic member 50 decreases and approaches the room temperature TR. As indicated by the arrow A2 in FIG. 2, the decrease in temperature of the temperature-sensitive magnetic member 50 causes the magnetization of the temperature-sensitive magnetic member 50 to increase or decrease (S40). More specifically, as the temperature of the temperature-sensitive magnetic member 50 decreases, the magnetization of the temperature-sensitive magnetic member 50 increases, that is, the magnetization of the temperature-sensitive magnetic member 50 increases. This step S40 corresponds to the second magnetization change step, more specifically, to the first magnetization increase/decrease step.

In addition, in the present embodiment, provision of the frame 20 and the first heat insulating member 40 makes it easier for the temperature of the temperature-sensitive magnetic member 50 to decrease in step S40. This will be explained below.

In the present embodiment, as described above, the shape of frame 20 (more specifically, frame body portion 21) has a U shape.

Therefore, in step S40, a gap is generated between the temperature-sensitive magnetic member 50 attached to the free end portion F1 and the heat source 2 to which the fixed end portion F2 is fixed via the first heat insulating member 40. . Therefore, the heat from the heat source 2 is less likely to be transmitted from the heat source 2 to the temperature-sensitive magnetic member 50 via the frame 20, and the temperature of the temperature-sensitive magnetic member 50 can be easily lowered.

In this embodiment, a first heat insulating member 40 is provided.

Therefore, heat transfer between the heat source 2 and the thermal vibration power generation device 1 is suppressed. In the present embodiment, the transfer of heat from the heat source 2 having a higher temperature to the thermal vibration power generation device 1 (more specifically, the frame main body 21) is suppressed. That is, it is difficult for the heat source 2 to heat the frame main body 21 . Therefore, the heat of the heat source 2 is difficult to move to the temperature-sensitive magnetic member 50 attached to the frame main body 21 via the connecting member 22, so that the temperature of the temperature-sensitive magnetic member 50 is easily lowered in step S40.

Furthermore, in step S40, when the magnetization of the temperature-sensitive magnetic member 50 increases, a strong attractive force P is generated between the temperature-sensitive magnetic member 50 and the first magnet 10, as shown in FIG. is deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other. That is, step S10 is performed again. Further, steps S20 to S40 are performed. Therefore, the operation example of the power generation method by the thermal vibration power generation device 1 is repeated, and power generation by the power generation section 30 is continued.

In this embodiment, steps S10 to S40 constitute one power generation cycle, and the temperature and magnetization of the temperature-sensitive magnetic member 50 are repeatedly changed, thereby repeating the power generation cycle.

In step S40, the more the temperature of the temperature-sensitive magnetic member 50 decreases, the more easily the magnetization of the temperature-sensitive magnetic member 50 increases, so the cycle of power generation becomes faster. Similarly, in step S20, the more easily the temperature of the temperature-sensitive magnetic member 50 rises, the more easily the magnetization of the temperature-sensitive magnetic member 50 decreases, so the power generation cycle becomes faster. In step S40, the temperature of the temperature-sensitive magnetic member 50 tends to decrease as the room temperature TR decreases, and in step S20, the temperature of the temperature-sensitive magnetic member 50 tends to increase as the temperature TH increases.

Furthermore, power generation in step S30 will be described.

FIG. 7 is a diagram illustrating power generation by power generation unit 30 according to the present embodiment. In FIG. 7, the induced voltage generated in the power generation section 30 is detected in the operation example.

FIG. 7 shows that the cycle of power generation is repeated. S10 and S30 in FIG. 7 respectively correspond to the timing of step S10 and the timing of step S30 in FIG. FIG. 7 shows that the induced voltage generated in the power generation section 30 is detected each time the power generation cycle is repeated.

Note that, as shown in FIG. 7, power generation is being performed by the power generation unit 30 in step S10 as well. This is because the frame 20 vibrates when the temperature-sensitive magnetic member 50 contacts the first magnet 10 .

FIG. 8 is a diagram illustrating details of power generation by power generation unit 30 according to the present embodiment. More specifically, FIG. 8 is a diagram explaining the details of power generation at the timing when S30 in the "first power generation cycle" of FIG. 7 is performed.

In FIG. 8, power generation by the power generation unit 30 is illustrated with the timing at which S30 is performed as 0.05 s. As shown in FIG. 8, the induced voltage generated in the power generating section 30 reached approximately -0.6 V to +0.8 V, indicating that a high voltage was generated. 8, the induced voltage shown in FIG. 8 shows a different value from the induced voltage shown in FIG. 7 because the detection sensitivity of the induced voltage is improved.

[Summary, etc.]
In this embodiment, the thermal vibration power generation device 1 is the thermal vibration power generation device 1 provided in the heat source 2 . The thermal vibration power generation device 1 includes a frame 20 having a free end portion F<b>1 and a fixed end portion F<b>2 , and a power generation member 70 having a magnetostrictive element 32 and a power generation portion 30 provided on the frame 20 . The thermal vibration power generation device 1 includes a temperature-sensitive magnetic member 50 made of a temperature-sensitive magnetic material and provided at the free end portion F1 of the frame 20, and the first magnet 10. As shown in FIG. The state of the thermal vibration power generation device 1 includes a first state in which the temperature-sensitive magnetic member 50 gives and receives heat, and a second state in which the free end portion F1 freely vibrates.

Accordingly, in the first state, when the temperature-sensitive magnetic member 50 contacts, for example, the first magnet 10 provided in the heat source 2, the magnetization of the temperature-sensitive magnetic member 50 changes. The strength of the attractive force P between the magnetic member 50 and the first magnet 10 changes. In the present embodiment, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, so that the magnetization of the temperature-sensitive magnetic member 50 is reduced.

More specifically, magnetization of the temperature-sensitive magnetic member 50 decreases as the temperature of the temperature-sensitive magnetic member 50 rises. Therefore, the attractive force P between the temperature-sensitive magnetic member 50 and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50 is separated from the first magnet 10 . As a result, the temperature-sensitive magnetic member 50 freely vibrates in the second state, that is, the free end portion F1 of the frame 20 freely vibrates, so that the frame 20 vibrates.

As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Here, as shown in FIGS. 7 and 8, the power generation section 30 generates a high voltage. That is, the thermal vibration power generation device 1 capable of generating high voltage is realized.

Also, for example, the first magnet 10 is provided in the heat source. The first state is a state in which the temperature-sensitive magnetic member 50 contacts the first magnet 10 to exchange heat with the first magnet 10 .

Accordingly, in the first state, the magnetization of the temperature-sensitive magnetic member 50 changes when the temperature-sensitive magnetic member 50 comes into contact with the first magnet 10, so that the temperature-sensitive magnetic member 50 and the first magnet The strength of the attractive force P between 10 changes. In the present embodiment, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, so that the magnetization of the temperature-sensitive magnetic member 50 is reduced.

More specifically, magnetization of the temperature-sensitive magnetic member 50 decreases as the temperature of the temperature-sensitive magnetic member 50 rises. Therefore, the attractive force P between the temperature-sensitive magnetic member 50 and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50 is separated from the first magnet 10 . As a result, the temperature-sensitive magnetic member 50 freely vibrates in the second state, that is, the free end portion F1 of the frame 20 freely vibrates, so that the frame 20 vibrates.

As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Here, as shown in FIGS. 7 and 8, the power generation section 30 generates a high voltage. That is, the thermal vibration power generation device 1 capable of generating high voltage is realized.

Also, for example, the shape of the frame 20 has a U shape.

Thereby, when the temperature-sensitive magnetic member 50 is separated from the first magnet 10 (that is, when it corresponds to step S40), the temperature-sensitive magnetic member 50 attached to the free end portion F1 and the fixed end portion A gap is generated between F2 and the heat source 2 fixed via the first heat insulating member 40 . Therefore, heat from the heat source 2 is less likely to be transmitted from the heat source 2 to the temperature-sensitive magnetic member 50 via the frame 20 . Therefore, in this case, under the ambient temperature TR environment in which the thermal vibration power generation system 100 is installed, the temperature of the temperature-sensitive magnetic member 50 is likely to decrease, and the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

Further, for example, the thermal vibration power generation device 1 further includes a heat insulating member (first heat insulating member 40), and the fixed end portion F2 is attached to the heat source 2 via the first heat insulating member 40.

As a result, heat from the heat source 2 is less likely to be transmitted from the heat source 2 to the temperature-sensitive magnetic member 50 via the frame 20 . Therefore, in the present embodiment, when the temperature-sensitive magnetic member 50 is separated from the first magnet 10 (that is, in the case corresponding to step S40), the heat source 2 and the temperature-sensitive magnetic member 50 are separated from each other. It becomes difficult to transfer heat between them. Therefore, in this case, under the ambient temperature TR environment in which the thermal vibration power generation system 100 is installed, the temperature of the temperature-sensitive magnetic member 50 is likely to decrease, and the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

The frame 20 has a frame body portion 21 and a connecting member 22 provided with a free end portion F1.

The bending of the connecting member 22 made of a rigid and elastic material makes it easier for force to be transmitted to the magnetostrictive element 32 when the free end portion F1 freely vibrates in step S30, for example. Therefore, the coil 31 generates a large induced voltage (or induced current). That is, the thermal vibration power generation device 1 capable of generating a higher voltage is realized.

Further, for example, the thermal vibration power generation device 1 further includes a second magnet 60 provided at the free end portion F1.

As a result, an attractive force P is also generated between the first magnet 10 and the second magnet 60 . Therefore, the frame body 21 is easily deformed, the temperature-sensitive magnetic member 50 and the first magnet 10 are easily brought into contact with each other, and the power generation cycle is shortened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

Further, for example, the connecting member 22 has a first surface 221 facing the heat source 2 side and a second surface 222 facing back to the first surface 221, and the temperature-sensitive magnetic member 50 is provided on the first surface 221. , the second magnet 60 is provided on the second surface 222 .

Thereby, in the present embodiment, the temperature-sensitive magnetic member 50 is easily brought into contact with the first magnet 10 . Therefore, the temperature of the temperature-sensitive magnetic member 50 is likely to rise, and the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

Further, for example, the temperature TH (° C.) of the heat source 2 satisfies Tc≦TH≦2.0×Tc, where Tc (° C.) is the Curie temperature of the temperature-sensitive magnetic material.

Accordingly, in the present embodiment, when the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10 (that is, when it corresponds to step S20), the temperature of the temperature-sensitive magnetic member 50 rises. becomes easier. Therefore, the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

The power generation method according to the present embodiment is a power generation method using the thermal vibration power generation device 1 provided in the heat source 2 . The thermal vibration power generation device 1 includes a frame 20 having a free end portion F<b>1 and a fixed end portion F<b>2 , and a power generation section 30 having a magnetostrictive element 32 and provided on the frame 20 . The thermal vibration power generation device 1 includes a temperature-sensitive magnetic member 50 made of a temperature-sensitive magnetic material and provided at the free end portion F1 of the frame 20, and the first magnet 10. As shown in FIG. The power generation method includes a first magnetization change step in which the magnetization of the temperature-sensitive magnetic member 50 is increased or decreased by exchanging heat with the temperature-sensitive magnetic member 50 . In addition, the power generation method includes a power generation step in which the power generation unit 30 generates power through free vibration of the free end portion F1, and a second magnetization change step in which the magnetization of the temperature-sensitive magnetic member 50 is increased or decreased. ,including.

Accordingly, in the present embodiment, when the temperature-sensitive magnetic member 50 comes into contact with the first magnet 10 provided in the heat source 2, for example, the temperature-sensitive magnetic member 50 and the first magnet 10 generate heat. By giving and receiving, the magnetization of the temperature-sensitive magnetic member 50 is either increased or decreased. In the present embodiment, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, so that the magnetization of the temperature-sensitive magnetic member 50 is reduced. More specifically, magnetization of the temperature-sensitive magnetic member 50 decreases as the temperature of the temperature-sensitive magnetic member 50 rises. Therefore, the attractive force P between the temperature-sensitive magnetic member 50 and the first magnet 10 is weakened. As a result, for example, when the temperature-sensitive magnetic member 50 is separated from the first magnet 10, the temperature-sensitive magnetic member 50 freely vibrates, that is, the free end portion F1 of the frame 20 freely vibrates. Therefore, the frame 20 vibrates. As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Furthermore, the other change of the increase and decrease of the magnetization of the temperature-sensitive magnetic member 50 occurs. In the present embodiment, when the magnetization of the temperature-sensitive magnetic member 50 increases, the frame main body 21 deforms and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other. That is, power generation by the thermal vibration power generation device 1 is repeated, and power generation by the power generation section 30 is continued.

Also, for example, the first magnet 10 is provided in the heat source 2 . The power generation method includes a first contact step of contacting the temperature-sensitive magnetic member 50 with the first magnet 10 . The first magnetization change step is a first magnetization reduction step in which the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10 to reduce the magnetization of the temperature-sensitive magnetic member 50 . In the power generation step, the temperature-sensitive magnetic member 50 is separated from the first magnet 10 and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. The second magnetization change step is the first magnetization increase step in which the magnetization of the temperature-sensitive magnetic member 50 is increased.

As a result, in the present embodiment, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10 , thereby reducing the magnetization of the temperature-sensitive magnetic member 50 . More specifically, magnetization of the temperature-sensitive magnetic member 50 decreases as the temperature of the temperature-sensitive magnetic member 50 rises. Therefore, the attractive force P between the temperature-sensitive magnetic member 50 and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50 is separated from the first magnet 10 . As a result, the temperature-sensitive magnetic member 50 freely vibrates, that is, the free end portion F1 of the frame 20 freely vibrates, so that the frame 20 vibrates. As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Furthermore, when the magnetization of the temperature-sensitive magnetic member 50 increases, the frame main body 21 deforms and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other. That is, power generation by the thermal vibration power generation device 1 is repeated, and power generation by the power generation section 30 is continued.

A thermal vibration power generation system 100 according to this embodiment includes a heat source 2 and a thermal vibration power generation device 1 .

That is, since the thermal vibration power generation system 100 includes the thermal vibration power generation device 1 capable of generating high voltage, it is a power generation system capable of generating high voltage.

(Modification 1)
[Configuration of thermal vibration power generation system]
A configuration example of a thermal vibration power generation system 100a according to Modification 1 of the embodiment will be described below with reference to FIG.

FIG. 9 is a side view of a thermal vibration power generation system 100a according to this modification.

A thermal vibration power generation system 100a according to this modification has the same configuration as the thermal vibration power generation system 100 according to the embodiment, except for the following four points. Specifically, the four points are that the connecting member 22a is used instead of the connecting member 22, the second magnet 60 is not provided, and the temperature-sensitive magnetic member 50a is used instead of the temperature-sensitive magnetic member 50. and that a high-temperature heat source 2a and a low-temperature heat source 3a are used as heat sources.

A thermal vibration power generation system 100a according to this modification includes a thermal vibration power generation device 1a and a heat source. The thermal vibration power generation device 1a includes a first magnet 10, a power generation member 70a having a frame 20a and a power generation section 30, a first heat insulation member 40, and a temperature-sensitive magnetic member 50a.

The frame 20a is a member having a frame body portion 21 and a connecting member 22a. Unlike the connecting member 22, the connecting member 22a has thermal conductivity comparable to that of the material exhibiting high thermal conductivity, and rigidity and elasticity comparable to those of the material forming the frame main body 21. It may be configured by a material having Note that the connecting member 22 a has the same configuration as the connecting member 22 except for the material that constitutes it, and is a plate-shaped member having a first surface 221 and a second surface 222 .

The temperature-sensitive magnetic member 50a has the same configuration as the temperature-sensitive magnetic member 50 according to the embodiment, except for the constituent material. The temperature-sensitive magnetic member 50a is made of a NiCoMnIn alloy.

FIG. 10 is a diagram showing the relationship between the temperature and magnetization of the NiCoMnIn alloy forming the temperature-sensitive magnetic member 50a according to this modification. In the region of about -80°C to about 20°C, the magnetization decreases smoothly with increasing temperature. In the region of about 20° C. to about 40° C., the magnetization sharply increases as the temperature rises. In this region, martensite transformation occurs in the NiCoMnIn alloy, resulting in a rapid change in magnetization. In the region of about 40° C. to about 70° C., magnetization decreases with increasing temperature.

Further, the thermal vibration power generation system 100a according to this modification includes a high-temperature heat source 2a and a low-temperature heat source 3a as heat sources. In this modification, the thermal vibration power generation system 100a is installed and used in an environment of room temperature TR (20° C.), and the temperature of the high temperature heat source 2a is a temperature TH1 which is higher than the room temperature TR, and the low temperature heat source The temperature of 3a is a temperature TH2 which is lower than the room temperature TR. Here, as an example, the normal temperature TR is 20°C, the temperature TH1 is 40°C, and the temperature TH2 is 0°C.

Further, in this modification, the first magnet 10 is attached to the low-temperature heat source 3a without interposing the high heat-conducting member 11 or the like according to the embodiment. Since the first magnet 10 is cooled by the low-temperature heat source 3a, the temperature of the first magnet 10 tends to be closer to the temperature TH2 of the low-temperature heat source 3a than to the room temperature TR. °C).

Furthermore, the positional relationship between the high-temperature heat source 2a and the connecting member 22a will be described.

As in the embodiment, the magnetization of the temperature-sensitive magnetic member 50a changes with temperature, and the strength of the attractive force generated between the temperature-sensitive magnetic member 50a and the first magnet 10 changes. As shown in FIG. 9, when the attractive force between the temperature-sensitive magnetic member 50a and the first magnet 10 is weak, that is, when the temperature-sensitive magnetic member 50a and the first magnet 10 are not in contact with each other, , the high-temperature heat source 2a and the connecting member 22a are in contact with each other. At this time, the heat from the high-temperature heat source 2a is transferred to the temperature-sensitive magnetic member 50a through the connecting member 22a, thereby increasing the temperature of the temperature-sensitive magnetic member 50a.

Here, FIG. 11 is a side view for explaining the positional relationship between the high-temperature heat source 2a and the connecting member 22a according to this modification. As shown in FIG. 11, when the attractive force between the temperature-sensitive magnetic member 50a and the first magnet 10 is strong, that is, when the temperature-sensitive magnetic member 50a and the first magnet 10 are in contact with each other, do not contact the high-temperature heat source 2a and the connecting member 22a. At this time, the temperature-sensitive magnetic member 50a exchanges heat with the first magnet 10 attached to the low-temperature heat source 3a. That is, the temperature of the temperature-sensitive magnetic member 50a is lowered.

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1a will be described.

First, the thermal vibration power generation device 1a is installed in an environment of normal temperature TR. At this time, the heat from the high-temperature heat source 2a moves to the temperature-sensitive magnetic member 50a, thereby increasing the temperature of the temperature-sensitive magnetic member 50a and increasing the magnetization of the temperature-sensitive magnetic member 50a. As a result, the attractive force between the temperature-sensitive magnetic member 50 a and the first magnet 10 becomes stronger, and the temperature-sensitive magnetic member 50 a comes into contact with the first magnet 10 . That is, the first contact step is performed.

Further, in this modification, the temperature of the first magnet 10 is a temperature TH2 lower than the room temperature TR. Therefore, the temperature of the temperature-sensitive magnetic member 50a in contact with the first magnet 10 is lowered. That is, the temperature-sensitive magnetic member 50a exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50a. That is, the first magnetization change step (first magnetization decrease step) is performed.

As described above, even in the present modification, the state of the thermal vibration power generation device 1a is the first state in which the temperature-sensitive magnetic member 50a contacts the first magnet 10 to exchange heat with the first magnet 10. .

Subsequently, when the magnetization of the temperature-sensitive magnetic member 50a is sufficiently reduced due to the transfer of heat, the attractive force between the temperature-sensitive magnetic member 50a and the first magnet 10 weakens. As a result, the temperature-sensitive magnetic member 50a is separated from the first magnet 10, and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. That is, the power generation step is performed.

Thus, also in this modified example, the state of the thermal vibration power generation device 1a is the second state in which the free end portion F1 freely vibrates.

Further, the temperature-sensitive magnetic member 50a is separated from the first magnet 10, that is, the high-temperature heat source 2a and the connecting member 22a are in contact with each other. At this time, the heat from the high-temperature heat source 2a moves to the temperature-sensitive magnetic member 50a, thereby increasing the temperature of the temperature-sensitive magnetic member 50a and increasing the magnetization of the temperature-sensitive magnetic member 50a. That is, the second magnetization change step (first magnetization increase step) is performed.

Furthermore, when the magnetization of the temperature-sensitive magnetic member 50a increases, the attractive force between the temperature-sensitive magnetic member 50a and the first magnet 10 increases, and the temperature-sensitive magnetic member 50a contacts the first magnet 10. FIG. That is, the first contact step is performed.

In this manner, the power generation cycle is repeated also in the thermal vibration power generation device 1a according to the present modification.

As described above, in the first state, when the temperature-sensitive magnetic member 50a contacts the first magnet 10, the magnetization of the temperature-sensitive magnetic member 50a changes. The strength of the attractive force with the first magnet 10 changes. In this modification, the temperature-sensitive magnetic member 50a exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50a. More specifically, the magnetization of the temperature-sensitive magnetic member 50a decreases as the temperature of the temperature-sensitive magnetic member 50a decreases. Therefore, the attractive force between the temperature-sensitive magnetic member 50 a and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50 a is separated from the first magnet 10 .

As a result, the temperature-sensitive magnetic member 50a vibrates freely in the second state, that is, the free end F1 of the frame 20a vibrates, so that the frame 20a vibrates. As a result, an induced voltage (or induced current) is generated in the coil 31 . As a result, the thermal vibration power generation device 1a capable of generating a high voltage is realized as in the embodiment.

Further, unlike the embodiment, power generation by the power generation unit 30 may be performed using the temperature range in which the temperature-sensitive magnetic material undergoes martensite transformation, as shown in this modified example.

Moreover, in the above-described embodiment, the heat source 2 that exhibits the temperature TH that is higher than the room temperature TR is used, but the present invention is not limited to this. As shown in this modified example, a high voltage can also be generated in the thermal vibration power generation device 1a using the low-temperature heat source 3a exhibiting the temperature TH2 lower than the room temperature TR.

(Modification 2)
In the above-described embodiment and modified example 1, the frames 20 and 20a have a U-shape, but the shape is not limited to this. In this modified example, the shape of the frame is different from those of the above-described embodiment and modified example 1. FIG.

[Configuration of thermal vibration power generation system]
A configuration example of a thermal vibration power generation system 100b according to Modification 2 of the embodiment will be described below with reference to FIG.

FIG. 12 is a side view of a thermal vibration power generation system 100b according to this modification.

A thermal vibration power generation system 100b according to this modification mainly has the same configuration as the thermal vibration power generation system 100 according to the embodiment, except for the following one point. Specifically, one point is that the shape of the frame 20b is different.

A thermal vibration power generation system 100 b according to this modification includes a thermal vibration power generation device 1 b and a heat source 2 .

The thermal vibration power generation device 1 b includes a first magnet 10 , a power generation member 70 b having a frame 20 b and a power generation section 30 , a temperature-sensitive magnetic member 50 and a second magnet 60 . Note that the thermal vibration power generation device 1 b does not include the first heat insulating member 40 .

The frame 20b is a member corresponding to the frame body portion 21 according to the embodiment.

The frame 20b is a plate-shaped member, and as shown in FIG. 12, is provided with two or more bent portions B1 and B2. Further, the frame 20b is formed by bending a single plate-shaped member so that bent portions B1 and B2 are provided. The frame 20b may not have the bent portions B1 and B2, and in this case, the frame 20b may be a plate-shaped member.

The frame 20b is fixedly supported in a so-called cantilever state in which one end is a fixed end F2b and the other end is a free end F1b. In addition, in the thermal vibration power generation device 1b, the fixed end portion F2b of the frame 20b is fixed to the support fixture 200 and installed.

When the free end portion F1b freely vibrates, the frame 20b itself also vibrates. Further, when a strong attractive force is generated between the temperature-sensitive magnetic member 50 attached to the free end portion F1b and the first magnet 10, the frame 20b is deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 are separated from each other. 10 are in contact.

The material forming the frame 20b is not particularly limited, but may be, for example, a material having elasticity. Further, the material forming the frame 20b is preferably made of, for example, a material containing iron. The frame 20b is made of, for example, spring steel, cold-rolled steel strip, or the like.

A magnetostrictive element 32 included in the power generation section 30 is provided on the frame 20b. In addition, in this modification, the power generating magnet 33 included in the power generating section 30 is attached to the magnetostrictive element 32 .

In this modification, the first magnet 10 is attached to the heat source 2 without the high thermal conductivity member 11 or the like according to the embodiment. Therefore, heat from the heat source 2 moves to the first magnet 10 . Therefore, the temperature of the first magnet 10 tends to be closer to the temperature TH of the heat source 2 than to the temperature TR (20° C.), which is the same as the temperature TH (80° C.) of the heat source 2 here.

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1b will be described. Since this operation example is similar to the operation example of the power generation method by the thermal vibration power generation device 1, it will be briefly described.

First, the thermal vibration power generation device 1b is installed in an environment of normal temperature TR. Under the environment of the room temperature TR, the temperature of the temperature-sensitive magnetic member 50 is also the room temperature TR, and the magnetization of the temperature-sensitive magnetic member 50 is high as shown in FIG. Therefore, a strong attractive force is generated between the temperature-sensitive magnetic member 50 and the first magnet 10, the frame 20b is deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other. That is, the first contact step is performed.

In addition, in this modified example, the temperature of the first magnet 10 with which the temperature-sensitive magnetic member 50 is in contact is the temperature TH higher than the room temperature TR. Therefore, heat is transferred from the first magnet 10 exhibiting a high temperature TH to the temperature-sensitive magnetic member 50, and the temperature of the temperature-sensitive magnetic member 50 rises. In this manner, the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50. FIG. That is, the first magnetization change step (first magnetization decrease step) is performed.

Subsequently, when the magnetization of the temperature-sensitive magnetic member 50 is sufficiently reduced due to the transfer of heat, the attractive force between the temperature-sensitive magnetic member 50 and the first magnet 10 weakens. As a result, the temperature-sensitive magnetic member 50 is separated from the first magnet 10 and the free end portion F1b freely vibrates, whereby the power generation section 30 generates power. That is, the power generation step is performed.

Further, the temperature-sensitive magnetic member 50 is sufficiently cooled under the environment of the normal temperature TR in a state separated from the first magnet 10 . Therefore, the temperature of the temperature-sensitive magnetic member 50 decreases and approaches the room temperature TR. This increases the magnetization of the temperature-sensitive magnetic member 50 . That is, the second magnetization change step (first magnetization increase step) is performed.

In this manner, the power generation cycle is repeated also in the thermal vibration power generation device 1b according to this modification.

(Modification 3)
Although the second magnet 60 is provided in the above-described embodiment and modified example 2, the present invention is not limited to this. In this modification, the thermal vibration power generation device 1 c does not have the second magnet 60 .

A configuration example of a thermal vibration power generation system 100c according to Modification 3 of the embodiment will be described below with reference to FIG.

FIG. 13 is a side view of a thermal vibration power generation system 100c according to this modification.

A thermal vibration power generation system 100c according to this modification mainly has the same configuration as the thermal vibration power generation system 100b according to Modification 2, except for the following point. Specifically, one point is that the thermal vibration power generation device 1 c does not have the second magnet 60 .

A thermal vibration power generation system 100 c according to this modification includes a thermal vibration power generation device 1 c and a heat source 2 .

The thermal vibration power generation device 1c has the same configuration as the thermal vibration power generation device 1b except that the second magnet 60 is not provided. In this way, the power generation cycle is repeated even in the thermal vibration power generation device 1 c that does not have the second magnet 60 .

(Modification 4)
In Modified Examples 2 and 3, the heat source 2 that indicates the temperature TH that is higher than the room temperature TR is used, but the present invention is not limited to this. This modification differs from modifications 2 and 3 in that a low-temperature heat source is used.

[Configuration of thermal vibration power generation system]
A configuration example of a thermal vibration power generation system 100d according to Modification 4 of the embodiment will be described below with reference to FIG.

FIG. 14 is a side view of a thermal vibration power generation system 100d according to this modification.

A thermal vibration power generation system 100d according to this modification mainly has the same configuration as the thermal vibration power generation system 100c according to Modification 3, except for the following one point. Specifically, one point is that the low-temperature heat source 3d is used.

A thermal vibration power generation system 100d according to this modification includes a thermal vibration power generation device 1c and a low-temperature heat source 3d.

Further, the temperature of the low-temperature heat source 3d is a temperature TH3 which is lower than the room temperature TR. Here, as an example, the normal temperature TR is 20.degree. C. and the temperature TH3 is -30.degree.

Further, in this modification, the first magnet 10 is attached to the low-temperature heat source 3d without interposing the high heat-conducting member 11 according to the embodiment. Since the first magnet 10 is cooled by the low-temperature heat source 3d, the temperature of the first magnet 10 tends to be closer to the temperature TH3 of the low-temperature heat source 3d than the room temperature TR. 30° C.).

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1c according to this modified example will be described. Since this operation example is similar to the operation example of the power generation method by the thermal vibration power generation device 1a, a brief description will be given.

First, the thermal vibration power generation device 1c is installed in an environment of normal temperature TR. Under the environment of the room temperature TR, the temperature of the temperature-sensitive magnetic member 50 is also the room temperature TR, and the magnetization of the temperature-sensitive magnetic member 50 is high as shown in FIG. Therefore, a strong attractive force is generated between the temperature-sensitive magnetic member 50 and the first magnet 10, the frame 20b is deformed, and the temperature-sensitive magnetic member 50 and the first magnet 10 come into contact with each other. That is, the first contact step is performed.

Further, in this modification, the temperature of the first magnet 10 is a temperature TH3 that is lower than the room temperature TR. Therefore, when the temperature of the temperature-sensitive magnetic member 50 in contact with the first magnet 10 decreases, that is, when the temperature-sensitive magnetic member 50 exchanges heat with the first magnet 10, the temperature-sensitive magnetic member 50 magnetization is reduced. That is, the first magnetization change step (first magnetization decrease step) is performed.

Subsequently, when the magnetization of the temperature-sensitive magnetic member 50 is sufficiently reduced due to the transfer of heat, the attractive force between the temperature-sensitive magnetic member 50 and the first magnet 10 weakens. As a result, the temperature-sensitive magnetic member 50 is separated from the first magnet 10 and the free end portion F1b freely vibrates, whereby the power generation section 30 generates power. That is, the power generation step is performed.

Further, the temperature-sensitive magnetic member 50 is sufficiently heated under the environment of room temperature TR in a state separated from the first magnet 10 . Therefore, the temperature of the temperature-sensitive magnetic member 50 rises and approaches the room temperature TR. This increases the magnetization of the temperature-sensitive magnetic member 50 . That is, the second magnetization change step (first magnetization increase step) is performed.

In this manner, the power generation cycle is repeated also in the thermal vibration power generation device 1c according to this modification.

(Modification 5)
[Configuration of thermal vibration power generation system]
Furthermore, a configuration example of a thermal vibration power generation system 100f according to Modification 5 of the embodiment will be described with reference to FIG.

FIG. 15 is a side view of a thermal vibration power generation system 100f according to this modification.

A thermal vibration power generation system 100f according to this modification mainly has the same configuration as the thermal vibration power generation system 100 according to the embodiment except for the following four points.

Specifically, the four points are that the connecting member 22a is used instead of the connecting member 22, the second magnet 60 is not provided, and the temperature-sensitive magnetic member 50f is used instead of the temperature-sensitive magnetic member 50. The points are different in material forming the points, and the use of a high-temperature heat source 2f and a low-temperature heat source 3f as heat sources.

A thermal vibration power generation system 100f according to this modification includes a thermal vibration power generation device 1f and a heat source. The thermal vibration power generation device 1f includes a first magnet 10, a power generation member 70a having a frame 20a and a power generation section 30, a first heat insulation member 40, and a temperature-sensitive magnetic member 50f. In this modification, a high-temperature heat source 2f and a low-temperature heat source 3f are used as heat sources, and the thermal vibration power generation device 1f is provided in the high-temperature heat source 2f.

The frame 20a is the member described in the first modification. In this modification, the connecting member 22a of the frame 20a is a plate-shaped member having a first surface 221 facing the high-temperature heat source 2f and a second surface 222 facing the first surface 221. As shown in FIG. A temperature-sensitive magnetic member 50f is provided on the z-axis positive side of the connecting member 22a so as to be in contact with the second surface 222. As shown in FIG.

The temperature-sensitive magnetic member 50f has the same configuration as the temperature-sensitive magnetic member 50 according to the embodiment, except for the constituent material. The temperature-sensitive magnetic member 50f is made of a nickel-manganese-cobalt-tin alloy (NiMnCoSn alloy). More specifically, the temperature-sensitive magnetic member 50f is preferably an alloy that satisfies Ni _50-x Co _x Mn _50-y Sn _y (7<x<9 and 10<y<11, atomic ratio).

FIG. 16 is a diagram showing the relationship between the temperature and magnetization of the NiMnCoSn alloy forming the temperature-sensitive magnetic member 50f according to this modification. In the region of about 0° C. to about 30° C., the magnetization increases smoothly with increasing temperature. In the region of about 30° C. to about 50° C., the magnetization sharply increases as the temperature rises. In this region, martensite transformation occurs in the NiMnCoSn alloy, resulting in a rapid change in magnetization. In the region of about 50° C. to about 70° C., magnetization decreases with increasing temperature.

Also, this NiMnCoSn alloy can be processed by cutting or the like. In NiMnCoSn alloys, the temperature at which martensitic transformation occurs is easily controlled, that is, the transformation temperature can be set freely. In addition, the NiMnCoSn alloy has a large change in magnetization with temperature.

Further, the thermal vibration power generation system 100f according to this modification includes a high-temperature heat source 2f and a low-temperature heat source 3f as heat sources. In this modification, the thermal vibration power generation system 100f is installed and used in an environment of normal temperature TR (20° C.), and the temperature of the high-temperature heat source 2f is a temperature TH1 higher than the normal temperature TR, and the low-temperature heat source The temperature of 3f is the temperature TH2 which is lower than the room temperature TR.

Here, as an example, the normal temperature TR is 20° C., the temperature TH1 is 60° C., and the temperature TH2 is 10° C., but the temperature is not limited to these. As another example, the room temperature TR and the temperature TH2 may be the same temperature, for example, 20°C, and the temperature TH1 may be 60°C. In this alternative example, there is no need to cool the low-temperature heat source 3f.

Further, in this modification, the first magnet 10 is attached to the low-temperature heat source 3f without interposing the high heat-conducting member 11 or the like according to the embodiment. Since the first magnet 10 is cooled by the low-temperature heat source 3f, the temperature of the first magnet 10 tends to be closer to the temperature TH2 of the low-temperature heat source 3f than the room temperature TR. °C).

Also, in this modified example, a high heat conductive member 11f is used instead of the high heat conductive member 11. As shown in FIG. The high thermal conductivity member 11f has the same configuration as the high thermal conductivity member 11 according to the embodiment except for the shape. The high heat conduction member 11f is provided in contact with the high temperature heat source 2f, and is provided on the z-axis negative side of the connecting member 22a. Since the high heat conduction member 11f is provided in contact with the high temperature heat source 2f, the heat of the high temperature heat source 2f moves to the high heat conduction member 11f. Therefore, the temperature of the high heat conductive member 11f is likely to be closer to the temperature TH1 of the high-temperature heat source 2f than to the room temperature TR, and here it is the same temperature TH1 as the high-temperature heat source 2f. Also, the high thermal conductivity member 11f may come into contact with the first surface 221 of the connecting member 22a depending on the state of the thermal vibration power generation device 1f as shown in FIG.

Furthermore, the positional relationship between the low-temperature heat source 3f and the connecting member 22a will be described.

The first magnet 10 and the low-temperature heat source 3f are provided on the second surface 222 side. That is, the first magnet 10 and the low-temperature heat source 3f are provided on the z-axis positive side of the connecting member 22a. In FIG. 15, the first magnet 10 and the temperature-sensitive magnetic member 50f are not in contact, but depending on the state of the thermal vibration power generation device 1f, the first magnet 10 and the temperature-sensitive magnetic member 50f may be in contact. . For example, in a state (open state) in which the frame 20a is deformed so that the free end portion F1 and the fixed end portion F2 are opened, the first magnet 10 and the temperature-sensitive magnetic member 50f are in contact with each other.

As in the embodiment, the magnetization of the temperature-sensitive magnetic member 50f changes with temperature, and the strength of the attractive force generated between the temperature-sensitive magnetic member 50f and the first magnet 10 changes. As shown in FIG. 15, when the attractive force between the temperature-sensitive magnetic member 50f and the first magnet 10 is weak, that is, when the temperature-sensitive magnetic member 50f and the first magnet 10 are not in contact with each other, are in contact with the high heat conductive member 11f and the connecting member 22a, which are in contact with the high temperature heat source 2f. At this time, the heat from the high-temperature heat source 2f moves to the temperature-sensitive magnetic member 50f via the connecting member 22a, thereby increasing the temperature of the temperature-sensitive magnetic member 50f.

Here, FIG. 17 is a side view for explaining the positional relationship between the low-temperature heat source 3f and the connecting member 22a according to this modified example. As shown in FIG. 17, when the attractive force between the temperature-sensitive magnetic member 50f and the first magnet 10 is strong, that is, when the temperature-sensitive magnetic member 50f and the first magnet 10 are in contact with each other, are not in contact with the high thermal conductivity member 11f and the connecting member 22a. At this time, the temperature-sensitive magnetic member 50f exchanges heat with the first magnet 10 attached to the low-temperature heat source 3f. That is, the temperature of the temperature-sensitive magnetic member 50f is lowered.

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1f will be described.

First, the thermal vibration power generation device 1f is installed under the environment of normal temperature TR. As shown in FIG. 16, since the magnetization of the temperature-sensitive magnetic member 50f is low, the attractive force between the temperature-sensitive magnetic member 50f and the first magnet 10 is weak. 22a. At this time, the heat from the high-temperature heat source 2f moves to the temperature-sensitive magnetic member 50f, thereby increasing the temperature of the temperature-sensitive magnetic member 50f and increasing the magnetization of the temperature-sensitive magnetic member 50f. As a result, the attractive force between the temperature-sensitive magnetic member 50 f and the first magnet 10 becomes stronger, and the temperature-sensitive magnetic member 50 f comes into contact with the first magnet 10 . That is, the first contact step is performed.

Further, in this modification, the temperature of the first magnet 10 is a temperature TH2 lower than the room temperature TR. Therefore, the temperature of the temperature-sensitive magnetic member 50f in contact with the first magnet 10 is lowered. That is, the temperature-sensitive magnetic member 50f exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50f. That is, the first magnetization change step (first magnetization decrease step) is performed.

Thus, also in this modification, the state of the thermal vibration power generation device 1f is the first state in which the temperature-sensitive magnetic member 50f contacts the first magnet 10 to exchange heat with the first magnet 10. .

Subsequently, when the magnetization of the temperature-sensitive magnetic member 50f is sufficiently reduced due to the transfer of heat, the attractive force between the temperature-sensitive magnetic member 50f and the first magnet 10 weakens. As a result, the temperature-sensitive magnetic member 50f is separated from the first magnet 10 and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. That is, the power generation step is performed.

Thus, also in this modification, the state of the thermal vibration power generation device 1f is the second state in which the free end portion F1 freely vibrates.

Furthermore, the temperature-sensitive magnetic member 50f is separated from the first magnet 10, that is, the high thermal conductivity member 11f and the connecting member 22a are in contact with each other. At this time, the heat from the high-temperature heat source 2f moves to the temperature-sensitive magnetic member 50f, thereby increasing the temperature of the temperature-sensitive magnetic member 50f and increasing the magnetization of the temperature-sensitive magnetic member 50f. That is, the second magnetization change step (first magnetization increase step) is performed.

Furthermore, when the magnetization of the temperature-sensitive magnetic member 50f increases, the attractive force between the temperature-sensitive magnetic member 50f and the first magnet 10 increases, and the temperature-sensitive magnetic member 50f comes into contact with the first magnet 10. FIG. That is, the first contact step is performed.

In this manner, the power generation cycle is repeated also in the thermal vibration power generation device 1f according to the present modification.

As described above, in the first state, when the temperature-sensitive magnetic member 50f comes into contact with the first magnet 10, the magnetization of the temperature-sensitive magnetic member 50f changes. The strength of the attractive force with the first magnet 10 changes. In this modification, the temperature-sensitive magnetic member 50f exchanges heat with the first magnet 10, thereby reducing the magnetization of the temperature-sensitive magnetic member 50f. More specifically, the magnetization of the temperature-sensitive magnetic member 50f decreases as the temperature of the temperature-sensitive magnetic member 50f decreases. Therefore, the attractive force between the temperature-sensitive magnetic member 50 f and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50 f is separated from the first magnet 10 .

As a result, the temperature-sensitive magnetic member 50f freely vibrates in the second state, that is, the free end portion F1 of the frame 20a freely vibrates, so that the frame 20a vibrates. As a result, an induced voltage (or induced current) is generated in the coil 31 . As a result, a thermal vibration power generation device 1f capable of generating a high voltage is realized as in the embodiment.

In addition, in this modification, the low-temperature heat source 3f may be a heat radiating member made of metal, for example, and the temperature of the low-temperature heat source 3f in this case is the same as the room temperature TR.

(Modification 6)
[Configuration of thermal vibration power generation system]
Furthermore, a configuration example of a thermal vibration power generation system 100g according to Modification 6 of the embodiment will be described with reference to FIGS. 18 and 19. FIG.

FIG. 18 is a side view of a thermal vibration power generation system 100g according to this modification. FIG. 19 is a front view illustrating two first magnets 10 in a thermal vibration power generation system 100g according to this modification. Note that the front view is a view of the thermal vibration power generation system 100g seen from the positive direction of the x-axis.

A thermal vibration power generation system 100g according to this modification mainly has the same configuration as the thermal vibration power generation system 100 according to the embodiment except for the following four points. Specifically, the four points are that the second magnet 60 is not provided, that the temperature-sensitive magnetic member 50f is used instead of the temperature-sensitive magnetic member 50, and that the high thermal conductivity member 11 is replaced with a magnetic member. 12g, and each of the two first magnets 10 is provided at the free end F1.

A thermal vibration power generation system 100 g according to this modification includes a thermal vibration power generation device 1 g and a heat source 2 . The thermal vibration power generation device 1f includes two first magnets 10, a power generation member 70 having a frame 20 and a power generation section 30, a first heat insulation member 40, a temperature-sensitive magnetic member 50f, and a magnetic member 12g. . In this modification, the thermal vibration power generation device 1g is provided in the heat source 2. As shown in FIG.

A thermal vibration power generation system 100g according to this modification includes a heat source 2 as a heat source. In this modification, the thermal vibration power generation system 100g is installed and used in an environment of room temperature TR (25° C.), and the temperature of the heat source 2 is a temperature TH which is higher than the room temperature TR. As an example, in this modified example, the normal temperature TR is 25°C and the temperature TH is 55°C.

The temperature-sensitive magnetic member 50f is the member described in Modification 5. In this modification, the temperature-sensitive magnetic member 50f is provided on the first surface 221 of the connecting member 22. is provided in

Next, the two first magnets 10 will be described with reference to FIGS. 18 and 19. FIG.

The two first magnets 10 are provided at the free end portion F1 of the connecting member 22 and are in contact with the temperature-sensitive magnetic member 50f. Each of the two first magnets 10 is provided penetrating from the first surface 221 to the second surface 222, so that the two first magnets 10 are in contact with the temperature-sensitive magnetic member 50f. As shown in FIGS. 18 and 19, the two first magnets 10 protrude from the second surface 222 toward the z-axis positive side. Moreover, in this modification, the two first magnets 10 do not directly contact the heat source 2 and the magnetic member 12g provided in contact with the heat source 2, respectively.

Furthermore, one of the two first magnets 10 (here, the first magnet 10 on the y-axis negative side) is in contact with the temperature-sensitive magnetic member 50f at the S pole. The other first magnet 10 (here, the first magnet 10 on the y-axis positive side) of the two first magnets 10 is in contact with the temperature-sensitive magnetic member 50f at its N pole.

In addition, the thermal vibration power generation device 1g only needs to have one or more first magnets 10, and as shown in this modification, the one or more first magnets 10 are replaced by two first magnets 10 should include

Further, in this modified example, a magnetic member 12g is used instead of the high thermal conductivity member 11. As shown in FIG. The magnetic member 12g is made of a magnetic material, more specifically, made of a ferromagnetic material. 12 g of magnetic members are good to contain metal materials, such as Fe, Ni, and Co, for example. In addition, since the magnetic member 12g contains these metal materials, it also has high thermal conductivity.

12 g of magnetic members are provided in contact with the heat source 2, and are provided in the z-axis negative side rather than the connection member 22. As shown in FIG. 12 g of magnetic members are attached to the heat source 2 which shows the temperature TH. Therefore, here, the temperature of the magnetic member 12g is also the temperature TH. As shown in FIG. 18, depending on the state of the thermal vibration power generation device 1g, the magnetic member 12g and the temperature-sensitive magnetic member 50f are not in contact with each other.

Further, the positional relationship among the temperature-sensitive magnetic member 50f, the two first magnets 10, and the magnetic member 12g will be described.

As shown in FIG. 16, the magnetization of the temperature-sensitive magnetic member 50f changes with temperature, so the magnetic field in the thermal vibration power generation device 1g changes. Due to this change in the magnetic field, the strength of the attractive force generated between the magnetic member 12g and the two first magnets 10 changes.

FIG. 20 is a side view showing a state in which the temperature-sensitive magnetic member 50f and the magnetic member 12g are in contact with each other according to this modification. When the attractive force between the magnetic member 12g and the two first magnets 10 is strong, the temperature-sensitive magnetic member 50f and the two first magnets 10 are arranged so that the temperature-sensitive magnetic member 50f and the magnetic member 12g are in contact with each other. and the magnetic member 12g are preferably arranged.

In this modification, when the magnetization of the temperature-sensitive magnetic member 50f is low, a strong attractive force is generated between the two first magnets 10 and the magnetic member 12g. , the frame main body 21) is deformed. At this time, as shown in FIG. 20, the temperature-sensitive magnetic member 50f and the two first magnets 10 are preferably arranged so that the temperature-sensitive magnetic member 50f and the magnetic member 12g are in contact with each other.

Further, as shown in FIGS. 18 to 20, in this modification, a temperature-sensitive magnetic member 50f is arranged on the z-axis positive side of the magnetic member 12g, and the temperature-sensitive magnetic member 50f is positioned on the z-axis positive side. Two first magnets 10 are arranged on the side.

Further, the attraction force will be described with reference to FIGS. 21 and 22. FIG. FIG. 21 is a diagram showing a thermal vibration power generation device 1g in which the magnetization of the temperature-sensitive magnetic member 50f is low according to this modification. FIG. 22 shows a thermal vibration power generation device 1g in which the magnetization of the temperature-sensitive magnetic member 50f according to this modification is stronger than that shown in FIG.

As shown in FIG. 21, when the magnetization of the temperature-sensitive magnetic member 50f is low, the magnetic lines of force pass through the two first magnets 10, the temperature-sensitive magnetic member 50f, and the magnetic member 12g in the thermal vibration power generation device 1g. . Since the magnetic lines of force reach the magnetic member 12g, a strong attractive force is generated between the two first magnets 10 and the magnetic member 12g, and the temperature-sensitive magnetic member 50f and the magnetic member 12g come into contact with each other.

Next, with reference to FIG. 22, a case where the magnetization of the temperature-sensitive magnetic member 50f is stronger than that shown in FIG. 21 will be described. In this case, in the thermal vibration power generation device 1g, the magnetic lines of force pass through the two first magnets 10 and the temperature-sensitive magnetic member 50f and do not pass through the magnetic member 12g. As the magnetism of the temperature-sensitive magnetic member 50f is strengthened, the magnetic field is short-circuited and the magnetic path is closed, so that the lines of magnetic force do not reach the magnetic member 12g. Therefore, in the case shown in FIG. 22, a strong attractive force is not generated between the two first magnets 10 and the magnetic member 12g. The elasticity of the frame 20 separates the temperature-sensitive magnetic member 50f from the magnetic member 12g.

[Example of operation]
Next, an operation example of the power generation method by the thermal vibration power generation device 1g will be described with reference to FIGS. 18 to 22 and 23 to 25. FIG.

FIG. 23 is a flowchart of an operation example of the thermal vibration power generation device 1g according to this modification. 24 and 25 are side views illustrating an operation example of the thermal vibration power generation device 1g according to this modification.

First, the thermal vibration power generation device 1g is installed in the heat source 2 under the environment of normal temperature TR. At this time, as shown in FIG. 20, the temperature-sensitive magnetic member 50f comes into contact with the magnetic member 12g (S10g). Under the environment of the normal temperature TR, the temperature of the temperature-sensitive magnetic member 50f is also the normal temperature TR, and as shown in FIG. 16, the magnetization of the temperature-sensitive magnetic member 50f is low. Therefore, as described with reference to FIG. 21, since the magnetization of the temperature-sensitive magnetic member 50f is low, a strong attractive force is generated between the two first magnets 10 and the magnetic member 12g. contacts the magnetic member 12g. This step S10g corresponds to the second contact step.

Further, the magnetic member 12g is attached to the heat source 2 exhibiting a temperature TH higher than the normal temperature TR. Therefore, here, the temperature of the magnetic member 12g is also the temperature TH.

At step S10g, the temperature-sensitive magnetic member 50f is in contact with the magnetic member 12g. Therefore, heat is transferred from the magnetic member 12g exhibiting a high temperature TH to the temperature-sensitive magnetic member 50f, the temperature of the temperature-sensitive magnetic member 50f increases, and the magnetization of the temperature-sensitive magnetic member 50f changes. That is, here, the temperature-sensitive magnetic member 50f gives and receives heat, thereby causing one of an increase and a decrease in the magnetization of the temperature-sensitive magnetic member 50f (S20g). In this modification, the temperature-sensitive magnetic member 50f exchanges heat with the magnetic member 12g, thereby increasing the magnetization of the temperature-sensitive magnetic member 50f. To increase. This step S20g corresponds to the first magnetization change step, more specifically, to the second magnetization increase step.

Further, in steps S10g and S20g, the state of the thermal vibration power generation device 1g becomes the first state in which the temperature-sensitive magnetic member 50f exchanges heat. More specifically, in steps S10g and S20g, the state of the thermal vibration power generation device 1g is changed to the first state in which the temperature-sensitive magnetic member 50f contacts the magnetic member 12g to exchange heat with the magnetic member 12g. .

Further, in step S20g, when the magnetization of the temperature-sensitive magnetic member 50f is sufficiently increased, the attractive force between the magnetic member 12g and the two first magnets 10 is weakened. More specifically, the magnetic field of the thermal vibration power generation device 1g changes from the state shown in FIG. 21 to the state shown in FIG. 22, and a strong attractive force is generated between the two first magnets 10 and the magnetic member 12g. no longer. As a result, as shown in FIG. 24, the free end portion F1 vibrates freely and the power generation section 30 generates power (S30g). More specifically, as shown in FIG. 24, the temperature-sensitive magnetic member 50f separates from the magnetic member 12g and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. In this case, when the free end portion F1 freely vibrates, the frame 20 also vibrates. In FIG. 24, an arrow D indicates the direction in which the free end portion F1 freely vibrates. As the frame 20 vibrates, the power generation unit 30 generates power due to the inverse magnetostriction effect as described above. This step S30g corresponds to the power generation step.

Thus, in step S30g, the state of the thermal vibration power generation device 1g becomes the second state in which the free end portion F1 freely vibrates. In other words, the second state is also a state in which the temperature-sensitive magnetic member 50f freely vibrates and a state in which the frame 20 vibrates.

After step S30g, the temperature-sensitive magnetic member 50f is sufficiently cooled under the environment of room temperature TR while being separated from the magnetic member 12g. In other words, the temperature-sensitive magnetic member 50f radiates the heat transferred from the heat source 2 in step S20g. Therefore, the temperature of the temperature-sensitive magnetic member 50f decreases and approaches the room temperature TR. As the temperature of the temperature-sensitive magnetic member 50f drops, the magnetization of the temperature-sensitive magnetic member 50f is increased or decreased (S40g). More specifically, when the temperature of the temperature-sensitive magnetic member 50f drops, the magnetization of the temperature-sensitive magnetic member 50f decreases, that is, the magnetization of the temperature-sensitive magnetic member 50f decreases. This step 40g corresponds to the second magnetization change step, more specifically, to the second magnetization decrease step.

In addition, in this modified example, since the frame 20 and the first heat insulating member 40 are provided, the temperature of the temperature-sensitive magnetic member 50f is easily lowered in step S40g. This will be explained below.

In this modified example, as described above, the shape of the frame 20 (more specifically, the frame body portion 21) has a U shape.

Therefore, in step S40g, a gap is generated between the temperature-sensitive magnetic member 50f attached to the free end portion F1 and the heat source 2 to which the fixed end portion F2 is fixed via the first heat insulating member 40. . Therefore, the heat from the heat source 2 is less likely to be transmitted from the heat source 2 to the temperature-sensitive magnetic member 50f via the frame 20, and the temperature of the temperature-sensitive magnetic member 50f can be easily lowered.

In this modified example, a first heat insulating member 40 is provided.

Therefore, heat transfer between the heat source 2 and the thermal vibration power generation device 1g is suppressed. In this modification, heat transfer from the heat source 2 having a higher temperature to the thermal vibration power generation device 1g (more specifically, the frame main body 21) is suppressed. That is, it is difficult for the heat source 2 to heat the frame main body 21 . Therefore, since the heat of the heat source 2 is difficult to move to the temperature-sensitive magnetic member 50f attached to the frame main body 21 via the connecting member 22, the temperature of the temperature-sensitive magnetic member 50f is easily lowered in step S40g.

Furthermore, in step S40g, when the magnetization of the temperature-sensitive magnetic member 50f decreases, as shown in FIG. is deformed, and the temperature-sensitive magnetic member 50f and the magnetic member 12g come into contact with each other. That is, step S10g is performed again. Further, steps S20g to S40g are performed. Therefore, the operation example of the power generation method by the thermal vibration power generation device 1g is repeated, and power generation by the power generation section 30 is continued.

In this modification, steps S10g to S40g constitute one cycle of power generation, and the cycle of power generation is repeated by repeatedly changing the temperature and magnetization of the temperature-sensitive magnetic member 50f.

In step S40g, the more easily the temperature of the temperature-sensitive magnetic member 50f drops, the more easily the magnetization of the temperature-sensitive magnetic member 50f decreases, so the power generation cycle becomes faster. Similarly, in step S20g, the more easily the temperature of the temperature-sensitive magnetic member 50f rises, the more easily the magnetization of the temperature-sensitive magnetic member 50f increases, so the power generation cycle becomes faster. Further, in step S40g, the temperature of the temperature-sensitive magnetic member 50f tends to decrease as the room temperature TR decreases, and in step S20g, the temperature of the temperature-sensitive magnetic member 50f tends to increase as the temperature TH increases.

Further, a more detailed example of modification 6 will be described below. In a more detailed example of modification 6, a thermal vibration power generation device 1g in which a frame 20h is used in place of the frame 20 and a bolt 80 and an auxiliary yoke member 90 are used will be described.

FIG. 26 is a plan view around a frame 20h included in the thermal vibration power generation device 1g according to this embodiment. FIG. 27 is a front view around a frame 20h provided in the thermal vibration power generation device 1g according to this embodiment. FIG. 28 is a side view of the periphery of a frame 20h included in the thermal vibration power generation device 1g according to this embodiment.

A thermal vibration power generation device 1g according to the present embodiment includes two first magnets 10, a power generation member having a frame 20h and a power generation section 30, a first heat insulation member 40, a temperature-sensitive magnetic member 50f, and a magnetic member. 12g, a bolt 80, and an auxiliary yoke member 90.

As shown in FIG. 26, the frame 20h according to this embodiment has a frame body portion 21h and a connecting member 22h.

The frame body portion 21h and the connecting member 22h are fixed by bolts 80. As shown in FIG.

The frame body portion 21h has a bifurcated region. The connecting member 22h also has a bifurcated region. The connecting member 22h is attached to the frame main body 21h by providing a bolt 80 in a region where the bifurcated region of the frame main body 21h and the bifurcated region of the connecting member 22h overlap in plan view. ing.

The connecting member 22h includes a plurality of heat radiating fins 223. As shown in FIG. In this embodiment, each of the plurality of radiation fins 223 extends in the y-axis direction, and each of the plurality of radiation fins 223 has a comb tooth shape.

The auxiliary yoke member 90 is a member made of, for example, Fe, and is provided in contact with the two first magnets 10 . The auxiliary yoke member 90 is provided on the z-axis positive side of the two first magnets 10 .

By providing the auxiliary yoke member 90 in contact with the two first magnets 10, for example, the lines of magnetic force shown in FIGS. A strong attractive force P is likely to occur between them.

Also in the thermal vibration power generation device 1g according to the present embodiment, the same operation as in the flowchart shown in FIG. 23 is repeated. In other words, the temperature and magnetization of the temperature-sensitive magnetic member 50f repeatedly change, thereby repeating the power generation cycle.

Also, the connecting member 22 h includes a plurality of heat radiation fins 223 .

As a result, in this embodiment as well, the temperature-sensitive magnetic member 50f is more easily cooled via the plurality of radiation fins 223 of the connecting member 22h when the process of step S40g shown in FIG. 23 is performed. In other words, the temperature-sensitive magnetic member 50f easily dissipates the heat transferred from the heat source 2 .

[Power generation by the power generation part]
Here, power generation when the thermal vibration power generation device 1g according to the present embodiment performs the same operation as the flowchart shown in FIG. 23 will be described with reference to FIGS. 29 to 32. FIG.

FIG. 29 is a diagram showing temperature changes over time of the magnetic member 12g and the temperature-sensitive magnetic member 50f according to the present embodiment. FIG. 30 is a diagram showing temporal changes in the voltage generated by the thermal vibration power generation device 1g according to the present embodiment. FIG. 31 is a diagram showing temporal changes in the generated voltage at the first time shown in FIG. FIG. 32 is a diagram showing temporal changes in the generated voltage at the second time shown in FIG.

Note that the times shown in FIGS. 29 and 30 are the same.

A temperature sensor senses the temperature of each of the heat source and the temperature-sensitive magnetic member 50f according to the present embodiment. As shown in FIG. 29, the temperature of the temperature-sensitive magnetic member 50f decreases from time 0 sec to the first time, which corresponds to step S40g shown in FIG.

When the temperature of the temperature-sensitive magnetic member 50f is sufficiently lowered to approximately 39° C., that is, when the magnetization of the temperature-sensitive magnetic member 50f is sufficiently reduced, at the first time, the magnetic member 12g and the two first magnets 10 and a strong attractive force P is generated. As a result, the frame body portion 21h is deformed, and the temperature-sensitive magnetic member 50f and the magnetic member 12g come into contact with each other. That is, step S10g is performed again.

The contact between the temperature-sensitive magnetic member 50f and the magnetic member 12g causes the frame 20h to vibrate. When the frame 20h vibrates, the power generation unit generates power due to the inverse magnetostriction effect as described above. In other words, the thermal vibration power generation device 1g according to the present embodiment also generates power in step S10g. As shown in FIG. 31, in step S10g, the voltage reached approximately −1.5 V to +1.8 V, generating a high voltage.

Furthermore, as shown in FIG. 29, the temperature of the temperature-sensitive magnetic member 50f increases from the first time to the second time, which corresponds to step S20g shown in FIG.

When the temperature of the temperature-sensitive magnetic member 50f sufficiently rises to about 47° C., that is, when the magnetization of the temperature-sensitive magnetic member 50f sufficiently increases, at the second time, the magnetic member 12g and the two first magnets 10 and strong attractive force P will not occur. As a result, the temperature-sensitive magnetic member 50f is separated from the magnetic member 12g, and the free end portion F1 vibrates freely, whereby the power generation section 30 generates power. That is, step S30g is performed. As shown in FIG. 32, in step S30g, the voltage reached about -0.5V to +0.5V, generating a high voltage.

Furthermore, as shown in FIG. 29, the temperature of the temperature-sensitive magnetic member 50f decreases after the second time period, and this period corresponds to step S40g shown in FIG. Thus, the power generation cycle is repeated also in the thermal vibration power generation device 1g according to the present embodiment.

[Summary, etc.]
In this modified example, the thermal vibration power generation device 1g is the thermal vibration power generation device 1g provided in the heat source 2 . A thermal vibration power generation device 1 g includes a frame 20 having a free end portion F<b>1 and a fixed end portion F<b>2 , and a power generation member 70 having a magnetostrictive element 32 and a power generation portion 30 provided on the frame 20 . The thermal vibration power generation device 1g is made of a temperature-sensitive magnetic material and includes a temperature-sensitive magnetic member 50f provided at the free end portion F1 of the frame 20, and the first magnet 10. As shown in FIG. The state of the thermal vibration power generation device 1g includes a first state in which the temperature-sensitive magnetic member 50f exchanges heat and a second state in which the free end portion F1 freely vibrates.

Accordingly, in the first state, when the temperature-sensitive magnetic member 50f contacts, for example, the magnetic member 12g provided in the heat source 2, the magnetization of the temperature-sensitive magnetic member 50f changes. and the first magnet 10 changes in strength. In this modification, the temperature-sensitive magnetic member 50f exchanges heat with the magnetic member 12g, thereby increasing the magnetization of the temperature-sensitive magnetic member 50f.

More specifically, as the temperature of the temperature-sensitive magnetic member 50f rises, the magnetization of the temperature-sensitive magnetic member 50f increases. Therefore, the attractive force P between the magnetic member 12g and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50f is separated from the magnetic member 12g. As a result, the temperature-sensitive magnetic member 50f freely vibrates in the second state, that is, the free end portion F1 of the frame 20 freely vibrates, so that the frame 20 vibrates.

As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Here, as shown in FIGS. 30 to 32, the power generating section 30 generates a high voltage. That is, a thermal vibration power generation device 1g capable of generating a high voltage is realized.

Further, for example, the thermal vibration power generation device 1g includes a magnetic member 12g provided on the heat source 2, and one or more first magnets 10 provided on the free end portion F1 and in contact with the temperature-sensitive magnetic member 50f. The first state is a state in which the temperature-sensitive magnetic member 50f contacts the magnetic member 12g to exchange heat with the magnetic member 12g.

Accordingly, in the first state, the magnetization of the temperature-sensitive magnetic member 50f changes when the temperature-sensitive magnetic member 50f comes into contact with the magnetic member 12g. The strength of the attractive force P of changes. In the present embodiment, the temperature-sensitive magnetic member 50f exchanges heat with the magnetic member 12g, thereby increasing the magnetization of the temperature-sensitive magnetic member 50f.

More specifically, as the temperature of the temperature-sensitive magnetic member 50f rises, the magnetization of the temperature-sensitive magnetic member 50f increases. Therefore, the attractive force P between the magnetic member 12g and the first magnet 10 is weakened, and the temperature-sensitive magnetic member 50f is separated from the magnetic member 12g. As a result, the temperature-sensitive magnetic member 50f freely vibrates in the second state, that is, the free end portion F1 of the frame 20 freely vibrates, so that the frame 20 vibrates.

As a result, the magnetostrictive element 32 included in the power generation section 30 provided on the frame 20 expands or contracts and deforms. Therefore, the lines of magnetic force of the magnetostrictive element 32 increase or decrease due to the inverse magnetostrictive effect, and as a result, an induced voltage (or induced current) is generated in the coil 31 . Here, as shown in FIGS. 30 to 32, the power generating section 30 generates a high voltage. That is, a thermal vibration power generation device 1g capable of generating a high voltage is realized.

Also, for example, the one or more first magnets 10 includes two first magnets 10 . One of the two first magnets 10 is in contact with the temperature-sensitive magnetic member 50f at the S pole, and the other first magnet 10 is at the N pole. It is in contact with the thermal magnetic member 50f.

As a result, more magnetic lines of force pass through the two first magnets 10, the temperature-sensitive magnetic member 50f, and the magnetic member 12g when the thermal vibration power generation device 1g is in the state shown in FIG. Therefore, the attractive force P becomes stronger. Therefore, the frame main body 21 is easily deformed, the temperature-sensitive magnetic member 50f and the magnetic member 12g are easily brought into contact with each other, and the power generation cycle is shortened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

Further, for example, the frame 20 has a frame body portion 21 and a connecting member 22 provided with a free end portion F1.

The bending of the connecting member 22 made of a material having rigidity and elasticity makes it easier for force to be transmitted to the magnetostrictive element 32 when the free end portion F1 freely vibrates in step S30g, for example. Therefore, the coil 31 generates a large induced voltage (or induced current). That is, a thermal vibration power generation device 1g capable of generating a higher voltage is realized.

Further, for example, the connecting member 22 has a first surface 221 facing the heat source 2 side and a second surface 222 facing the first surface 221 . The temperature-sensitive magnetic member 50 f is provided on the first surface 221 , and each of the one or more first magnets 10 is provided to penetrate from the first surface 221 to the second surface 222 .

Accordingly, since each of the one or more first magnets 10 is penetrated by the connecting member 22 and held, the one or more first magnets 10 are separated from the connecting member 22 when the free end portion F1 freely vibrates. becomes difficult to leave. In other words, it is possible to prevent the thermal vibration power generation device 1g from being unable to generate power due to the disconnection of one or more first magnets 10 from the connecting member 22, thereby realizing the thermal vibration power generation device 1g with high reliability.

Also, for example, the connecting member 22h includes a plurality of heat radiation fins 223 as shown in the embodiment.

As a result, in this embodiment as well, the temperature-sensitive magnetic member 50f is more easily cooled via the plurality of radiation fins 223 of the connecting member 22h when the process of step S40g shown in FIG. 23 is performed. In other words, the temperature-sensitive magnetic member 50f easily dissipates the heat transferred from the heat source 2 .

(Modification 7)
[Configuration of thermal vibration power generation system]
Furthermore, a configuration example of a thermal vibration power generation system 100j according to Modification 7 of the embodiment will be described with reference to FIGS. 33 and 34. FIG.

FIG. 33 is a side view of a thermal vibration power generation system 100j according to this modification. FIG. 34 is a plan view of the periphery of a connecting member 22j according to this modified example.

As shown in FIGS. 33 and 34, a thermal vibration power generation system 100j according to this modification includes a thermal vibration power generation device 1j and a heat source 2. FIG. The thermal vibration power generation device 1j includes four first magnets 10, a first power generation member 71j, a second power generation member 72j, two first heat insulation members 40, a temperature-sensitive magnetic member 50f, and a magnetic member. 12g, two bolts 80, and an auxiliary yoke member 90.

The second power generation member 72j has a power generation section 30 and a frame 21j.

The frame 21j is a member configured by the frame body portion 212j. The frame main body portion 212j has a free end portion F12 provided in the frame main body portion 212j, and has a region where the frame main body portion 212j is bifurcated, similar to the explanation of FIG. It has the same configuration as the frame main body 21 except for one point. The free end portion F12 is a bifurcated region.

Also, the first power generation member 71j has a power generation section 30 and a frame 20j.

The frame 20j is a member including a frame body portion 211j and a connecting member 22j provided with a free end portion F11. The frame body portion 211j has a bifurcated region. The frame body portion 211j has the same configuration as the frame body portion 21 except that it has the bifurcated region.

In addition, as shown in FIG. 34, the connecting member 22j has bifurcated regions on the positive and negative sides of the x-axis. A bolt 80 is provided in a region where the bifurcated region of the frame main body portion 211j and one of the bifurcated regions of the connecting member 22j overlap in plan view, so that the connecting member 22j is attached to the frame main body portion 211j. installed.

The connecting member 22j includes a plurality of radiating fins 223, as shown in FIG. In this modification, some of the plurality of heat radiation fins 223 extend in the y-axis direction, and some of the plurality of heat radiation fins 223 extend in the x-axis direction. Each of the plurality of radiation fins 223 has a comb tooth shape.

The connecting member 22j is connected to the free end portion F12 of the frame 21j (more specifically, the frame body portion 212j) of the second power generation member 72j. In this modification, the other of the bifurcated regions of the connecting member 22j and the free end portion F12 (the bifurcated region) are connected by a bolt 80 .

The four first magnets 10 and the temperature-sensitive magnetic member 50f are provided at the free end portion F11 of the connecting member 22j. The four first magnets 10 are in contact with the temperature-sensitive magnetic member 50f. The temperature-sensitive magnetic member 50f is installed on the z-axis negative side of the connecting member 22j. Each of the four first magnets 10 is provided penetrating from the first surface 221 to the second surface 222, so that the four first magnets 10 are in contact with the temperature-sensitive magnetic member 50f.

The four first magnets 10 are arranged along the y-axis, and have north poles, south poles, north poles, and south poles in order from the positive direction of the y-axis to the negative direction of the y-axis. It is in contact with the magnetic member 50f. That is, two adjacent first magnets 10 are in contact with the temperature-sensitive magnetic member 50f at different poles.

In this modification, the auxiliary yoke member 90 is provided on the z-axis positive side of the four first magnets 10 . Therefore, a strong attractive force is likely to occur between the four first magnets 10 and the magnetic member 12g.

Also in the thermal vibration power generation device 1j according to this modification, the same operation as in the flowchart shown in FIG. 23 is repeated. In other words, the temperature and magnetization of the temperature-sensitive magnetic member 50f repeatedly change, thereby repeating the power generation cycle.

[Summary, etc.]
In this modification, the power generation members include a first power generation member 71j and a second power generation member 72j. The frame 20j of the first power generation member 71j has a frame main body portion 211j and a connecting member 22j provided with a free end portion F11. The connecting member 22j is connected to the free end portion F12 of the frame 21j of the second power generation member 72j. The temperature-sensitive magnetic member 50f and one or more first magnets 10 (more specifically, four first magnets 10) are provided at the free end portion F11 of the connecting member 22j.

This realizes a thermal vibration power generation device 1j that generates power by two power generation members (that is, the first power generation member 71j and the second power generation member 72j).

(Other embodiments)
As described above, the thermal vibration power generation device and the like according to the present invention have been described based on the embodiments and modifications, but the present invention is not limited to these embodiments and modifications. As long as it does not deviate from the gist of the present invention, various modifications that can be made by those skilled in the art can be applied to the embodiments, and other forms constructed by combining some of the constituent elements of the embodiments and modifications can also be applied to the present invention. included in the range of

The temperature-sensitive magnetic material used for the temperature-sensitive magnetic member is not limited to the above. FIG. 35 is a diagram showing the relationship between temperature and magnetization of a temperature-sensitive magnetic material (NiCoMnAl alloy) that constitutes a temperature-sensitive magnetic member according to another embodiment. Thus, a temperature-sensitive magnetic material that does not undergo martensite transformation may be used.

The thermal vibration power generation system according to the embodiment and modifications 1 to 7 can generate a higher voltage than a known thermoelectric power generation element (so-called Peltier element), and has a high degree of design freedom. high.

In order for the known thermoelectric generator to generate voltage, a temperature difference is required between both sides of the thin plate thickness of the thermoelectric generator (between the narrow gaps). Therefore, a high-temperature heat source is brought into close contact with one of the two surfaces, and a heat sink or the like for cooling is often provided on the other of the two surfaces.

By the way, for example, in the thermal vibration power generation system 100 according to the embodiment, as shown in FIG. In step S40, the temperature of the temperature-sensitive magnetic member 50 is lowered under the environment of normal temperature TR (low temperature here).

Thus, no temperature difference is required across a narrow gap, for example, in FIG. The thermal vibration power generation system 100 operates by having (a gap of several mm or more and several cm or less). Thus, since no temperature difference is required between the narrow gaps, the thermal vibration power generation systems according to the embodiment and Modifications 1 to 7 have a high degree of freedom in design.

Furthermore, although the thermal vibration power generation devices according to the embodiment and modifications 1 to 7 are installed in a heat source, they can operate in an environment where normal temperature TR is used as the low temperature, as described above. Especially in the thermal vibration power generation devices according to the embodiment and Modifications 1 to 5, the operation depends on the Curie temperature Tc. Depending on the characteristics of the material forming the temperature-sensitive magnetic member, the thermal vibration power generation devices according to the embodiment and Modifications 1 to 7 operate even if the temperature of the heat source is about 80° C., for example.

In a device that converts thermal energy into electrical energy, the temperature of the heat source used, which is about 80° C., is relatively low. In other words, it is shown that the thermal vibration power generation devices according to the embodiment and Modifications 1 to 7 operate in a superior temperature environment compared to other devices that convert thermal energy into electrical energy.

Also, for example, a second heat insulating member may be provided instead of the connecting member 22 according to the embodiment. The frame included in the thermal vibration power generation device in this case may have the frame main body portion 21 and the second heat insulating member provided with the free end portion F1. The second heat insulating member has a first surface 221 facing the heat source 2 and a second surface 222 facing back to the first surface 221. The temperature-sensitive magnetic member 50 is provided on the first surface 221 and Two magnets 60 may be provided on the second surface 222 .

This second heat insulating member is preferably made of a material having a thermal conductivity lower than that of the material forming the frame main body 21 . For example, a resin or the like can be used as the material forming the second heat insulating member, and more specifically, Bakelite (phenolic resin) can be used, but the material is not limited to this.

Note that this second heat insulating member has the same shape and configuration as the connecting member 22, except for the material that constitutes it. Therefore, heat transfer between the frame body 21 and the temperature-sensitive magnetic member 50 attached to the free end F1 of the second heat insulating member can be suppressed.

Such a second heat insulating member suppresses heat transfer from the frame body portion 21 to the temperature-sensitive magnetic member 50 . More specifically, it becomes easier to suppress the transfer of heat from the heat source 2 to the temperature-sensitive magnetic member 50 via the frame 20 . As a result, in step S40, the temperature of the temperature-sensitive magnetic member 50 can be easily lowered. Therefore, the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

In the embodiment, the thermal vibration power generation device 1 preferably includes at least one of the first heat insulating member 40 and the second heat insulating member. That is, for example, if the first heat insulating member 40 is not provided or if a member that does not exhibit heat insulation is provided instead of the first heat insulating member 40, the second heat insulating member may be provided. Thereby, when the temperature-sensitive magnetic member 50 is separated from the first magnet 10 (that is, when it corresponds to step S40), heat is transferred between the heat source 2 and the temperature-sensitive magnetic member 50. difficult to do. Therefore, in this case, under the ambient temperature TR environment in which the thermal vibration power generation system 100 is installed, the temperature of the temperature-sensitive magnetic member 50 is likely to decrease, and the power generation cycle is quickened. Therefore, for example, a high voltage can be generated at a high frequency per unit time.

In addition, in the embodiment, modified example 1 and modified example 5, the connecting member does not include a plurality of heat radiating fins, but the present invention is not limited to this. The connection member according to the embodiment, Modification 1 and Modification 5 may include a plurality of heat radiation fins as shown in Modification 6.

For example, when the connecting member 22 according to the embodiment has a plurality of heat radiating fins, the temperature of the temperature-sensitive magnetic member 50 tends to decrease in step S40, for example.

Further, as shown in Modification 7, the thermal vibration power generation device 1j provided with the first magnet 10 in contact with the temperature-sensitive magnetic member 50f includes a first power generation member 71j and a second power generation member 72j as power generation members. As shown in the embodiment, the thermal vibration power generation device 1 provided with the first magnet 10 provided in the heat source 2 may also include the first power generation member and the second power generation member as power generation members. That is, for example, the following thermal vibration power generation device may be realized.

Such a thermal vibration power generation device is a thermal vibration power generation device provided in a heat source. The thermal vibration power generation device includes a frame having a free end and a fixed end, and a power generation member having a magnetostrictive element and a power generation section provided on the frame. The thermal vibration power generation device includes a temperature-sensitive magnetic member made of a temperature-sensitive magnetic material and provided at a free end of a frame, and a first magnet. The state of the thermal vibration power generation device includes a first state in which the temperature-sensitive magnetic member exchanges heat and a second state in which the free end freely vibrates. In the thermal vibration power generation device, the first magnet is provided in the heat source, and the first state is a state in which the temperature-sensitive magnetic member contacts the first magnet to exchange heat with the first magnet. Further, in the thermal vibration power generation device, the power generation member includes a first power generation member and a second power generation member, and the frame of the first power generation member includes a frame main body and a connecting member provided with a free end. have. The connecting member is connected to the free end of the frame of the second power generation member, and the temperature-sensitive magnetic member is provided at the free end of the connecting member.

Also, the above-described embodiment can be modified, replaced, added, or omitted in various ways within the scope of claims or equivalents thereof.

INDUSTRIAL APPLICABILITY The present invention can be used as a thermal vibration power generation device capable of generating high voltage, attached to a mechanical device together with a sensor, etc., and used as a power source for detecting an abnormality in the mechanical device.

1, 1a, 1b, 1c, 1f, 1g, 1j Thermal vibration power generation device 2 Heat sources 2a, 2f High temperature heat sources 3a, 3d, 3f Low temperature heat source 10 First magnets 11, 11f High heat conduction member 12g Magnetic members 20, 20a, 20b, 20h, 20j, 21j Frames 21, 21h, 211j, 212j Frame body portions 22, 22a, 22h, 22j Connecting member 30 Power generating unit 31 Coil 32 Magnetostrictive element 33 Magnet for power generation 40 First heat insulating member 50, 50a, 50f Temperature-sensitive magnetism Body member 60 Second magnets 70, 70a, 70b Power generation member 71j First power generation member 72j Second power generation member 80 Bolt 90 Auxiliary yoke members 100, 100a, 100b, 100c, 100d, 100f, 100g, 100j Thermal vibration power generation system 200 Support Fixed base 211 First inner surface 212 Second inner surface 213 First outer surface 214 Second outer surface 221 First surface 222 Second surface 223 Radiation fins A1, A2, D Arrows B, B1, B2 Bent portions F1, F1b, F11, F12 Free ends F2, F2b Fixed end P Attractive force

Claims (18)

A thermal vibration power generation device provided in a heat source,
a power generation member having a frame having a free end and a fixed end, and a power generation unit having a magnetostrictive element and provided to the frame;
a temperature-sensitive magnetic member made of a temperature-sensitive magnetic material and provided at the free end of the frame;
a first magnet;
The state of the thermal vibration power generation device is
a first state in which the temperature-sensitive magnetic member exchanges heat;
a second state in which the free end freely vibrates. A thermal vibration power generation device. The first magnet is provided in the heat source,
The thermal vibration power generation device according to claim 1, wherein the first state is a state in which the temperature-sensitive magnetic member contacts the first magnet to exchange heat with the first magnet. The thermal vibration power generation device according to claim 2, wherein the frame has a frame main body and a connecting member provided with the free end. The thermal vibration power generation device according to claim 3, further comprising a second magnet provided at the free end. The connecting member has a first surface facing the heat source and a second surface facing the first surface,
The temperature-sensitive magnetic member is provided on the first surface,
The thermal vibration power generation device according to claim 4, wherein the second magnet is provided on the second surface. a magnetic member provided in the heat source;
one or more first magnets provided at the free end and in contact with the temperature-sensitive magnetic member;
The thermal vibration power generation device according to claim 1, wherein the first state is a state in which the temperature-sensitive magnetic member contacts the magnetic member to exchange heat with the magnetic member. the one or more first magnets includes two first magnets;
one of the two first magnets is in contact with the temperature-sensitive magnetic member at the S pole;
The thermal vibration power generation device according to claim 6, wherein the other first magnet of the two first magnets is in contact with the temperature-sensitive magnetic member at its N pole. The thermal vibration power generation device according to claim 6, wherein the frame has a frame main body and a connecting member provided with the free end. The connecting member has a first surface facing the heat source and a second surface facing the first surface, and the temperature-sensitive magnetic member is provided on the first surface,
The thermal vibration power generation device according to claim 8, wherein each of the one or more first magnets is provided penetrating from the first surface to the second surface. The thermal vibration power generation device according to claim 3 or 8, wherein the connecting member includes a plurality of heat radiation fins. The power generation member includes a first power generation member and a second power generation member,
the frame included in the first power generation member includes a frame main body and a connecting member provided with the free end;
the connecting member is connected to the free end of the frame of the second power generation member;
The thermal vibration power generation device according to claim 6, wherein the temperature-sensitive magnetic member and the one or more first magnets are provided at the free end of the connecting member. The thermal vibration power generation device according to claim 1, 2 or 6, wherein the frame has a U-shape. further comprising a heat insulating member,
The thermal vibration power generation device according to claim 1, 2 or 6, wherein the fixed end is attached to the heat source via the heat insulating member. When the temperature TH (°C) of the heat source is the Curie temperature of the temperature-sensitive magnetic material Tc (°C),
Tc ≤ TH ≤ 2.0 x Tc
The thermal vibration power generation device according to claim 1 or 2, satisfying: A power generation method using a thermal vibration power generation device provided in a heat source,
The thermal vibration power generation device is
a frame having free ends and fixed ends;
a power generation unit having a magnetostrictive element and provided on the frame;
a temperature-sensitive magnetic member made of a temperature-sensitive magnetic material and provided at the free end of the frame;
a first magnet;
The power generation method includes:
a first magnetization change step in which the magnetization of the temperature-sensitive magnetic member is changed to one of an increase and a decrease by heat transfer by the temperature-sensitive magnetic member;
a power generation step in which the power generation unit generates power by causing the free end to vibrate freely;
a second magnetization changing step in which the other of the increase and the decrease in magnetization of the temperature-sensitive magnetic member occurs. The first magnet is provided in the heat source,
The power generation method includes:
including a first contact step in which the temperature-sensitive magnetic member contacts the first magnet;
The first magnetization change step is a first magnetization reduction step in which magnetization of the temperature-sensitive magnetic member is reduced by exchanging heat between the temperature-sensitive magnetic member and the first magnet,
In the power generation step, the temperature-sensitive magnetic member is separated from the first magnet and the free end portion is caused to freely vibrate, whereby the power generation section generates power,
The power generation method according to claim 15, wherein the second magnetization change step is a first magnetization increase step that causes an increase in magnetization of the temperature-sensitive magnetic member. The thermal vibration power generation device is
a magnetic member provided in the heat source;
one or more first magnets provided at the free end and in contact with the temperature-sensitive magnetic member;
The power generation method includes:
a second contact step in which the temperature-sensitive magnetic member contacts the magnetic member;
The first magnetization change step is a second magnetization increase step in which the temperature-sensitive magnetic member exchanges heat with the magnetic member to increase the magnetization of the temperature-sensitive magnetic member,
In the power generation step, the temperature-sensitive magnetic member is separated from the magnetic member, and the free end portion freely vibrates to cause the power generation section to generate power,
The power generation method according to claim 15, wherein the second magnetization change step is a second magnetization decrease step in which magnetization of the temperature-sensitive magnetic member is decreased. a heat source;
A thermal vibration power generation system comprising the thermal vibration power generation device according to claim 1, 2 or 6.

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