KR101060647B1 - rotary heat pump - Google Patents

Abstract

Following an intermediate form between the ideal Carnot cycle and the Stirling cycle, a thermally efficient rotary heat pump, which transfers heat from low temperature to high temperature by a heat cycle caused by the compression and expansion of gas by external power, is disclosed. The rotary heat pump may include a cylinder accommodating an operating gas therein, a heat dissipation part disposed at a front end of the cylinder and dissipating heat generated by the working gas to the outside when the operating gas is compressed, and at a rear end of the cylinder. And a heat absorbing part which absorbs heat from the outside when the working gas is expanded and provides a cooling effect to the outside, and is linearly reciprocally housed in the cylinder and the working gas is the heat radiating part or the like. An opening is formed to be in direct contact with the heat absorbing portion and a piston for inducing compression and expansion of the working gas, and a rotation driving unit for providing an external rotational driving force to the piston so that the piston induces compression and expansion of the working gas. It may be configured to include.

Description

ROTARY HEAT PUMP

The present invention relates to a heat pump, and more particularly, to a rotary heat pump that transfers heat from a low temperature to a high temperature by a heat cycle caused by compression and expansion of a gas supplied by an external power, similar to an ideal Carnot cycle. It is about.

The Carnot engine is an ideal thermal efficiency engine with no heat loss, and practically all engines cannot exceed the thermal efficiency of the Carnot engine. Unlike general internal combustion engines, external combustion engines exhibit high thermal efficiency, among which a Stirling engine has a high thermal efficiency similar to that of the Carnot cycle and has low vibration and noise.

All heat engines, such as the Carnot engine and the Stirling engine, are powered using heat moving from high temperature to low temperature. On the contrary, when the gas is compressed and expanded by providing external power in a reverse cycle, the heat engine becomes a heat pump that moves heat. An example of such a substantial heat pump is a Stirling refregerator.

However, the Stirling cooler as described above has a problem that is used only in a very limited field because the overall device is large and the structure is complex, the production cost is high and high technical level is required due to the difficulty of maintenance. In addition, the conventional cooler is a cooling by the heat of vaporization of the liquid made by high-pressure condensation using a refrigerant, there is a problem that follows a complicated thermal cycle, such as a compressor. In addition, there is an environmental problem of the refrigerant, a limitation of the cooling temperature according to the refrigerant.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a rotary heat pump having high thermal efficiency while similarly following an intermediate heat cycle of a carno cycle and a sterling cycle.

Another object of the present invention is to provide a rotary heat pump that is simple in structure and low in manufacturing cost and easy to maintain, unlike a conventional cooler having a complicated heat circulation structure such as phase conversion through a compressor / cooler. .

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

Rotational heat pump according to an embodiment of the present invention for achieving the above object is located in the front end of the cylinder, the cylinder containing the working gas therein, and the heat generated from the working gas when the working gas is compressed Heat dissipation unit for discharging to the outside, located in the rear end of the cylinder and the heat absorbing unit to absorb the heat from the outside when the operating gas is expanded to provide a cooling effect to the outside, linear reciprocating inside the cylinder A piston which is movably received and an opening is formed in direct contact with the heat dissipating portion or the heat absorbing portion and causes a compression and expansion of the working gas, and the piston prevents the compression and expansion of the working gas. It may be configured to include a rotary drive for providing an external rotational drive force to the piston to cause.

In addition, the cylinder is preferably formed between the heat dissipating portion and the heat absorbing portion to increase the thermal efficiency.

In addition, the cylinder is preferably provided with a cylinder head portion coupled to seal the front end of the cylinder by a fastening means.

In addition, it is preferable that the cylinder head portion guides the opening to be located at the heat dissipation portion when the working gas is compressed to the maximum.

In addition, the cylinder head portion is preferably provided with a protrusion formed on one surface facing the piston to provide a space spaced from the inner diameter of the cylinder to form a guide groove into which the front end portion of the piston is inserted.

In addition, the heat dissipation unit and the heat absorption unit is preferably provided in a ring shape on the outer peripheral surface of the cylinder.

In addition, the heat dissipating unit may be provided with a cooling unit for cooling the heat emitted from the heat dissipating unit.

In addition, according to the first embodiment of the cooling unit, the cooling unit may include a cooling fin formed on the outer diameter of the heat dissipation unit, and a cooling fan for supplying air to the cooling fin to cool it.

In addition, according to the second embodiment of the cooling unit, the cooling unit may include a cooling tube wound around the outer diameter of the heat dissipation unit, and a cooling pump for supplying cooling water to the cooling tube.

In addition, the heat absorption unit may be provided with a cooling circulation unit for circulating the outside air cooled by the heat absorption unit.

The cooling circulation unit may include a circulation path chamber providing a circulation path of air so that external air passes through the heat absorbing unit, and a blowing fan provided in the circulation path chamber to force circulation of the air.

In addition, the rotation drive unit preferably converts the rotational energy provided from the outside into mechanical mechanical energy for linear reciprocating vibration of the piston.

The rotary drive unit may include a motor generating a rotational force, a crank arm connected to a rotating shaft of the motor, and connecting the piston and the crank arm to generate power according to the rotation of the motor such that the piston reciprocates linearly. It may include a connecting rod to pass to.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the rotary heat pump of the present invention as described above has one or more of the following effects.

First, by similarly following the thermal cycle of the intermediate form between the Carnot cycle and the Stirling cycle, higher thermal efficiency can be expected than conventional sterling coolers.

Second, unlike the existing cooler having a complex heat circulation structure such as a compressor, it is possible to cool only by compressing and expanding the gas without requiring a special refrigerant, so that the production is simple and easy to maintain.

Third, unlike conventional compressors, there is no need to liquefy the refrigerant, and relatively high pressure compression is not necessary, so noise or compression is easy.

Fourth, the airtight structure in which the free piston vibrates in the closed cylinder makes it easy to operate with a high-pressure gas, thereby obtaining high cooling efficiency per volume.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view schematically showing a rotary heat pump according to an embodiment of the present invention.
2 is a cross-sectional view taken along a line II-II in Fig.
Figure 3 is an exploded perspective view of the cylinder of the rotary heat pump of the present invention.
4 is a cross-sectional view showing the configuration of a cylinder.
5 is an exploded perspective view of the piston of the rotary heat pump of the present invention.
6 is a cross-sectional view showing the configuration of a piston.
7A and 7B are exemplary views showing an embodiment of a cooling unit provided in the heat dissipating unit of the rotary heat pump of the present invention.
8 is an exemplary view showing an embodiment of the cooling circulation unit provided in the heat absorption unit of the rotary heat pump of the present invention.
9A to 9D are exemplary views for sequentially explaining the operation of the rotary heat pump according to the present invention.
10A and 10B are graphs showing a refrigeration cycle of a rotary heat pump according to the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a rotary heat pump according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

1 is a perspective view schematically illustrating a rotary heat pump according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is an exploded view of a cylinder in the rotary heat pump of the present invention. It is a perspective view, FIG. 4 is sectional drawing which shows the structure of a cylinder, FIG. 5 is an exploded perspective view of the piston among the rotary heat pumps of this invention, and FIG. 6 is sectional drawing which shows the structure of a piston.

As shown in Figures 1 to 6, the rotary heat pump 10 according to an embodiment of the present invention is a cylinder 100, piston 200, heat dissipation unit 300, heat absorbing unit 400 and rotation It may be configured to include a drive unit 500 and the like.

The cylinder 100 is formed in a cylindrical shape, and an operating gas such as hydrogen or helium is accommodated therein.

The cylinder 100 has fastening means such as bolts 125 and rivets so that the front end 111 of the cylinder body 110 is opened, and the open face 111a of the front end 111 of the cylinder body 110 is sealed. The cylinder head 120 is coupled by welding. Here, a plurality of bolt holes 122 are formed in the front end 111 of the cylinder body 110 for fastening and fixing the bolt 125.

The cylinder head part 120 may include a head cover 121 and a protrusion 123.

The head cover 121 is formed of a disc having a predetermined thickness and has a diameter equal to or larger than that of the front end 111 of the cylinder body 110, and has a bolt hole 112 of the front end 111 of the cylinder body 110. A plurality of bolt holes 122 are formed along the edges to correspond to the edges thereof, and are coupled to the front end 111 of the cylinder body 110 by the bolt 125 or the like. At this time, between the head cover 121 and the front end 111 of the cylinder body 110 is provided with a circular sealing member 130, for example, rubber packing is sealed to prevent the working gas inside the cylinder 100 to leak outside Can improve. The sealing member 130 has a circular hollow portion 130a formed at the center thereof so that the protrusion 123 of the cylinder head 120 can be inserted therein, and the bolt hole 132 can penetrate the bolt 125 at the edge thereof. ) May be formed.

The protrusion 123 protrudes in a cylindrical shape so as to face the piston 200 on one surface of the head cover 121 and is inserted into the open surface 111a of the front end 111 of the cylinder body 110. The protrusion 123 provides a space spaced apart from the inner diameter of the front end 111 of the cylinder body 110, preferably, a space G corresponding to the wall thickness of the front end 211 of the piston 200 to provide a piston. A guide groove 124 into which the front end portion 211 of the 200 is inserted is formed. In this case, the length of the protrusion 123, that is, the length of the guide groove 124 is such that the opening 212 of the piston 200 is located in the heat dissipation part 300 when the minimum volume of the working gas is compressed by the maximum vibration. It is preferable to form substantially the same as the length from the front end of the piston 200 to the front end of the opening 212.

The cylinder 100 has an opening surface 113a formed at the rear end 113 so that the piston 200 can be inserted into the cylinder 100.

The cylinder 100 may have a heat insulating part 140 to shield heat between the heat dissipating part 300 and the heat absorbing part 400 which will be described later. For example, the cylinder body 110 is entirely made of stainless steel, and the heat insulating part 140 between the heat dissipation part 300 and the heat absorption part 400 is made of ceramic or silica ( silica) material.

The piston 200 is a cylinder body 110 to enable a linear reciprocating motion according to the rotational movement of the rotary drive unit 500 to be described later in order to cause the compression and expansion of the working gas sealed between the cylinder 100 and the piston 200. ) Is housed inside. In the present exemplary embodiment, the configuration in which the free piston 200 is applied is illustrated, but is not limited thereto and may include various types of pistons.

The piston 200 is formed in a cylindrical shape in which the piston body 210 has a diameter corresponding to the inner diameter of the cylinder body 110, the front end portion 211 of the piston body 210 is a heat insulating material such as metal or ceramic having a low thermal conductivity It is preferably formed of vagina.

The piston 200 has an opening surface 211a formed so that the protrusion 123 of the cylinder head 120 is inserted into the front end portion 211 of the piston body 210, and from the rear portion of the opening 212 to be described later. It has a shape in which the inside is sealed. In addition, the piston 200 is preferably provided with a heat insulating member 219 in the rear portion of the opening (212).

Piston 200 has an opening 212 is formed so that the working gas is in direct contact with the heat dissipation unit 300 or the heat absorbing unit 400. Preferably, a plurality of openings 212 may be formed along the outer diameter of the front end portion 211 of the piston body 210. The opening 212 may be formed in various shapes such as a circle and a rectangle.

The front end 211 of the piston body 210 has a thickness corresponding to the gap G of the guide groove 124 formed between the inner wall of the cylinder body 110 and the protrusion 123 of the cylinder head 120. It is preferred to have t). In addition, the front end portion 211 of the piston body 210 is a length that blocks the operating gas in contact with the heat dissipating portion 300 when the maximum optimum of the operating gas, that is, the vibration width of the piston 200 is the maximum. It is preferably formed. For example, in the present embodiment, when the length of the three regions of the heat dissipating part 300, the heat insulating part 140, and the heat absorbing part 400 is the same, the cylinder head part 120 may have a length sufficient to cover the same. It is preferable that the protrusion 123 has a length substantially equal to the length of the guide groove 124.

The piston 200 may be provided with at least one piston ring 220 in the outer diameter of the rear end portion 213 of the piston body 210 so that the portion in contact with the inner wall of the cylinder body 110 is sealed. To this end, the outer diameter of the piston body 210 is preferably provided with at least one in the piston ring seating groove 215 that can be fixed by seating the piston ring 220. The piston ring 220 is located in the heat absorbing portion 400 of the cylinder 100 during the linear reciprocating motion of the piston 200, it is also possible to use a material that operates in a low temperature region, such as Teflon ring. In the present embodiment, but the configuration for applying the piston ring 220, but not limited to this, instead of the piston ring 220 may be arranged in the vertical bearing form a fixed ring on the inner wall of the cylinder body (110).

Piston 200 is coupled to the rear end 213 of the piston body 210, one end 531 of the connecting rod 530 to be described later is hinged (531a).

The heat source 300 is located at the front end 111 of the cylinder 100 and is a component for dissipating heat generated from the working gas to the outside when the working gas is compressed. The heat dissipation part 300 may be made of a metal material having good heat transfer, and may be provided in a ring shape on the outer circumferential surface of the cylinder 100, but is not limited thereto and may be selected in various embodiments.

The heat sink 300 may include cooling parts 310 and 320 for cooling the heat emitted from the heat dissipation part 300.

For example, as shown in FIG. 7A, the cooling unit 310 supplies air to the cooling fins 311 and the cooling fins 311 formed at the outer diameter of the heat dissipation unit 300 of the cylinder 100. It can be configured in the form of air-cooled cooling, including a cooling fan 312 to cool. Here, the cooling fins 311 may be formed in an uneven shape to increase the area in contact with the atmosphere so that cooling can be performed more rapidly under the atmosphere.

In addition, as shown in FIG. 7B, the cooling unit 320 is a cooling tube 321 wound around the outer diameter of the heat dissipating unit 300 of the cylinder 100, and cooling to supply cooling water to the cooling tube 321. It may be configured in the form of water-cooled cooling including the pump 322 and the like.

The heat absorbing part 400 is located at the rear end 113 of the cylinder 100 and is a component for absorbing heat to the working gas from the outside when the working gas is expanded to provide a cooling effect to the outside. The heat absorbing part 400 may be provided in a ring shape on the outer circumferential surface of the cylinder body 110, but is not limited thereto and may be selected in various embodiments.

The heat absorbing part 400 may be provided with a cooling circulation part 410 for circulating outside air cooled by the heat absorbing part 400.

For example, as illustrated in FIG. 8, the cooling circulation unit 410 includes a circulation path chamber 411 which provides a circulation path of air so that external air passes through the heat absorbing unit 400, and a circulation path chamber. It is provided inside the 411 may be provided with a blowing fan 412 for forcibly circulating air. The circulation path chamber 411 may have an inlet 411a through which air is sucked in, and an outlet 411b through which cold air cooled by the heat absorber 400 may be discharged.

The rotary drive unit 500 is a component for providing an external rotary drive force to the piston 200 so that the piston 200 causes compression and expansion of the working gas.

The rotary drive unit 500 converts rotational energy provided from the outside into mechanical energy for linear reciprocating motion of the piston 200, and rotates the motor 510, the crank arm 520, and the connecting rod 530. It can be provided.

The motor 510 is fixed to the outside of the cylinder 100 by a fixed frame (not shown) to generate rotational force. The rotating shaft 511 of the motor 510 is a piston connected to the connecting rod 530 by switching to a linear motion through the connecting rod 530 while performing a circular motion having a radius of the length of the crank arm 520 to be described later. 200) to enable linear reciprocating motion. Although not shown in the drawing, in the rotary heat pump including a plurality of cylinders 100, the direction of the crank arm 520 may be shifted by different angles.

The crank arm 520 is connected to the rotation shaft 511 of the motor 510, and is preferably connected in a direction perpendicular to the rotation shaft 511.

The connecting rod 530 is a component that transmits power to the piston 200 according to the rotation of the motor 510 so that the piston 200 linearly reciprocates. The connecting rod 530 has one end 531 coupled to the lower end 213 of the piston 200 by a hinge 531a including a bearing, and the other end 532 includes a bearing in the crank arm 520 by a hinge ( 532a). Since the connecting rod 530 is subjected to compressive and tensile loads, the connecting rod 530 should have a sufficient thickness to withstand it, and should be formed to a sufficient length to smoothly transmit power. The length of the connecting rod 530 is preferably formed to be 3 to 4 times the length of the crank arm 520.

9 and 10, the operation of the rotary heat pump according to an embodiment of the present invention will be described in detail.

9A to 9D are exemplary views for sequentially explaining the operation of the rotary heat pump according to the present invention, and FIG. 10 is a graph showing a refrigeration cycle of the rotary heat pump according to the present invention.

First, as shown in FIG. 9A, between the cylinder 100 and the piston 200 through an external rotation driving force of the rotation driving unit 500 including the motor 510, the crank arm 520, and the connecting rod 530. When the piston 200 is moved toward the front end 111 of the cylinder 100 until the optimum of the working gas sealed in the space of the cylinder is minimized (left side in the drawing), the working gas is in a high temperature compression state. At this time, the working gas emits thermal energy Q1 while directly contacting the heat dissipation part 300 through the opening 212 of the piston 200 (②-> ① high temperature compression process of FIG. 10A). Thermal energy Q1 emitted from the heat dissipation unit 300 may be cooled by the cooling units 310 and 320 as shown in FIGS. 7A and 7B. The heat transfer between the heat dissipation part 300 and the heat absorption part 400 is shielded by the heat insulating part 140 provided between the heat dissipation part 300 and the heat absorption part 400.

Next, as shown in FIG. 9B, when the piston 200 is gradually moved toward the rear end 113 of the cylinder 100 (rightward in the drawing), the working gas exposed to the heat dissipating part 300 is cooled. The temperature drops as it expands. At this time, the working gas is to release the heat energy (Q4) through the heat dissipation unit 300 (①-> ④ high temperature expansion process of Figure 10a).

Next, as shown in Figure 9c, the piston 200 is the rear end 113 of the cylinder 100 until the volume of the working gas sealed in the space between the cylinder 100 and the piston 200 is maximum Moving toward) (rightward in the drawing), the working gas is in a low temperature cold expansion state. At this time, the heat energy Q3 is absorbed into the working gas while the opening 212 of the piston 200 is in direct contact with the heat absorbing part 400 (④ '-> ③ low temperature cooling expansion process of FIG. 10A). Therefore, the cooling effect is generated as the working gas absorbs the heat energy Q3 around the heat absorbing part 400, and the cold air cooled by the heat absorbing part 400 is cooled in the cooling cycle as shown in FIG. 8. 410 may be cycled.

Next, as shown in Figure 9d, the low-temperature expanded operating gas continues to absorb the thermal energy (Q3), the heat emitting unit 300 is blocked and the operating gas is heated while only the heat absorbing unit 400 in contact. Is compressed. At this time, part of the thermal energy Q2 is absorbed into the working gas (3-> ② `low temperature cooling compression process of Figure 10a).

When the axial length of the cylinder 100 including the heat insulating portion 140 between the heat dissipating portion 300 and the heat absorbing portion 400 is longer than the length of the opening 212 of the piston 200, the heat insulating portion is adiabatic. Sections (2)-> ②`, ④`-> ④ process of FIG. 10a exist, and the overall heat cycle of ①-> ②-> ②`-> ③-> ④`-> ④-> ① of FIG. The cycle of the process is completed. If the axial length of the cylinder 100 including the heat insulating part 140 between the heat dissipating part 300 and the heat absorbing part 400 is equal to the length of the opening 212 of the piston 200, there is no heat insulating section (②). = ②`, ④ = ④`) Follow the ideal thermal cycle as shown in FIG. If the axial length of the cylinder 100 including the heat insulating portion 140 between the heat dissipating portion 300 and the heat absorbing portion 400 is shorter than the length of the opening 212 of the piston 200, the opening 212 is heated. Since the discharge part 300 and the heat absorbing part 400 are contacted at the same time, the heating and cooling of the working gas occur at the same time, resulting in a similar effect to the adiabatic effect. At this time, the thermal cycle of FIG. > ③-> ④`-> ④-> A cycle similar to the process of ① is completed (not shown).

As described above, the rotary heat pump 10 according to the present invention seals the working gas such as hydrogen or helium in the space formed by the cylinder 100 and the piston 200, and receives external | -W from the outside through an external rotation driving force. By providing the working gas, the heat energy of Q2 and Q3 is absorbed from the heat absorber 400 as shown in FIGS. 9A to 9D and FIG. Through the discharge process, a cooling effect is generated around the heat absorbing part 400.

Based on this, the thermal efficiency of the rotary heat pump 10 according to the present invention is as shown in Equation 1 below.

As shown in Equation 1, the rotary heat pump (heat pump) 10 according to the present invention is almost similar to the intermediate form of the ideal Carnot engine and the Stirling engine, so high thermal efficiency can be expected. In addition, unlike the conventional cooler having a complicated heat circulation structure such as a conventional compressor, the rotary heat pump 10 of the present invention is easy to manufacture with a simple structure because it can be cooled only by compression and expansion of gas without requiring a special refrigerant. .

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

10: rotary heat pump 100: cylinder
110: cylinder body 120: cylinder head portion
121: head cover 123: protrusion
124: guide groove 140: heat insulation
200: piston 210: piston body
212 opening 220 piston ring
300: heat dissipation unit 310,320: cooling unit
400: heat absorption unit 410: cooling circulation unit
500: rotation drive unit 510: motor
520: crank arm 530: connecting rod

Claims (12)

A cylinder in which the working gas is received;
Located at the front end of the cylinder, the heat dissipation unit for discharging the heat generated from the working gas to the outside when the working gas is compressed;
Located at the rear end of the cylinder, the heat absorbing unit for absorbing heat from the outside when the working gas is expanded when the working gas to provide a cooling effect to the outside;
The cylinder is accommodated in a linear reciprocating motion, the hollow part is opened forwardly in the front end portion, and an opening is formed on the outer circumferential surface of the front end portion so that the working gas directly contacts the heat dissipation portion or the heat absorption portion. A piston causing compression and expansion of the working gas; And
And a rotary drive for providing an external rotational driving force to the piston such that the piston causes compression and expansion of the working gas. The method of claim 1,
The cylinder is a rotary heat pump, characterized in that the heat insulating portion is formed between the heat dissipating portion and the heat absorbing portion. The method of claim 1,
The cylinder has a rotary heat pump comprising a cylinder head portion coupled to seal the front end portion of the cylinder by a fastening means. The method of claim 3, wherein
The cylinder head portion is a rotary heat pump, characterized in that the protrusion is formed on one surface facing the piston to provide a space spaced from the inner diameter of the cylinder to form a guide groove into which the front end portion of the piston is inserted. The method of claim 1,
The heat dissipating unit and the heat absorbing unit are provided in a ring shape on the outer circumferential surface of the cylinder. The method of claim 1,
The heat dissipating unit is a rotary heat pump, characterized in that the cooling unit for cooling the heat emitted from the heat dissipating unit. The method of claim 6, wherein the cooling unit,
Cooling fins formed on the outer diameter of the heat dissipation unit; And
Rotary heat pump comprising a cooling fan for supplying air to the cooling fins. The method of claim 6, wherein the cooling unit,
A cooling tube wound around an outer diameter of the heat dissipation unit; And
Rotary heat pump comprising a cooling pump for supplying cooling water to the cooling tube. The method of claim 1,
The heat absorption unit is a rotary heat pump, characterized in that the cooling circulation for circulating the outside air cooled by the heat absorption unit. The method of claim 9, wherein the cooling circulation unit,
A circulation path chamber providing a circulation path of air so that external air passes through the heat absorption unit; And
Rotating heat pump provided in the circulation path chamber, comprising a blowing fan for forced circulation of the air. The method of claim 1,
The rotary drive unit is a rotary heat pump, characterized in that for converting the rotational energy provided from the outside to mechanical mechanical energy for linear reciprocating vibration of the piston. The method of claim 11, wherein the rotation drive unit,
A motor generating a rotational force;
A crank arm connected to the rotating shaft of the motor; And
And a connecting rod connecting the piston to the crank arm and transmitting power to the piston according to the rotation of the motor such that the piston reciprocates linearly.

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