JPH05236847A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger facilitating the design of a small size, exhibiting a highly efficient heat-exchange action even in the small size, having a simple structure, capable of being produced at a low cost and allowing its employment for coolers used for the temperature control of a water tank such as a crawl. CONSTITUTION:A shaft body 20 is inserted into a cylinder 5 whose outer circumferential surface contacts with a heat-exchanging medium such as sea water to leave a gasification chamber 22 in the deep inner part of the cylinder. A cooling medium is charged into shaft holes 20a of the shaft body 20 in one direction of the cylinder 5 from a cooling medium-charging pipe 11 through a connector 12 and subsequently evaporated in the evaporation chamber 22. The generated cooling medium is charged into a spiral cooling medium passage 21 formed between the shaft body 20 and the cylinder 5, subjected to a heat exchange therein, successively charged toward the other end of the cylinder 5, separated from the connector 12 and subsequently discharged into a cooling medium-discharging pipe 13 through an inner space 16b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange device installed in a cooler or the like for controlling the temperature of seawater or the like in a water tank for cages as a heat exchange medium.

[0002]

2. Description of the Related Art As a conventional heat exchange device of this type, for example, Freon (trade name) gas is used as a refrigerant, and a pipe through which the refrigerant flows is densely wound in a coil shape to increase a heat exchange area. The refrigerant is introduced from one end of the pipe and the gas of the refrigerant vaporized in the coil portion is sent out from the other end of the pipe, and heat exchange is performed with the heat exchange medium such as seawater contacting the coil portion. The composition is known. Further, instead of winding the pipe in a coil shape, the pipe is bent into a U shape, and a fin in the shape of a partition wall is provided inside along the axial direction of the pipe to increase the heat exchange area.
Using a so-called inner fin type pipe, the refrigerant gas that has flowed in from one end of the pipe is vaporized in the pipe to perform heat exchange with the heat exchange medium that comes into contact therewith, and end the heat exchange from the other end. There is also known a structure that delivers a refrigerant. Further, the inlet and outlet of the refrigerant are connected to the open end of the tube whose one end is closed in the shape of a blind hole and a number of fins are formed on the outer periphery to increase the heat exchange area. More refrigerant is introduced and vaporized in the tube to fill the vaporized refrigerant gas in the entire tube, and heat exchange is performed with the heat exchange medium that touches the tube, and heat exchange is completed from the outlet. There is also known a structure for delivering a refrigerant gas.

Pipes and tubes of these heat exchange devices,
As the member that directly contacts the medium to be heat exchanged, a metal such as titanium having a high corrosion resistance is used when the medium is seawater or the like.

[0004]

In the above-mentioned conventional heat exchange device, the pipe is wound in a coil shape as follows.
Since there is a limit to the winding diameter of the pipe due to manufacturing, and it is not possible to make it too small, the casing such as the cooler that accommodates this,
It was so large that it was difficult to make a compact design as a whole.
Further, when the pipe is made of titanium, there is a problem that the length of the pipe becomes large due to the coiled winding, and the heat exchange apparatus as a whole becomes expensive due to the expensive material.

Further, in the above-mentioned conventional structure in which the inner fin type U-shaped pipe is used for the heat exchange device, since the pipe is bent and arranged in a U-shape, the width becomes wide in the lateral direction, and eventually the above-mentioned. Similar to the conventional configuration, it was difficult to downsize the entire device. Besides, there is a problem that the inner fin itself is expensive to manufacture.

Further, in the case of the conventional construction in which the refrigerant inlet and outlet are provided at one end of the tube and the refrigerant gas is filled in the tube, the refrigerant gas is sufficiently filled even in the inner part of the long tube. Therefore, there is a problem that the heat exchange action is insufficient as it does not circulate, so that it goes to the tip portion of the tube.

Therefore, the present invention has been made in consideration of the problems in the above-mentioned conventional structure, and the purpose thereof is to make it extremely easy to miniaturize the design, to efficiently perform the heat exchange action, and to manufacture it at a low cost. To provide a heat exchange device.

[0008]

In order to achieve the above object, the present invention has an outer peripheral surface which is placed so as to come into contact with a heat exchange medium such as seawater, and has a base end portion opened and a tip end portion closed. A cylindrical body formed, a shaft body having an axial hole opened at both ends while being inserted from an opening of the cylindrical body, and a refrigerant supply pipe and a refrigerant discharge pipe connected to the base end portion of the cylindrical body, A connecting body that communicates the one end opening of the shaft hole of the shaft body with the refrigerant supply pipe and introduces a refrigerant liquid into the shaft hole, and an inner end of the insertion end portion of the shaft body and the tip end portion of the cylindrical body. Formed between the outer peripheral portion of the shaft body and the inner peripheral portion of the cylindrical body, and a vaporization chamber that is formed between the outer peripheral portion of the shaft body and the inner peripheral portion of the cylindrical body to vaporize the refrigerant liquid introduced into the shaft hole of the shaft body to generate the refrigerant gas. At the same time, the refrigerant gas is circulated spirally around the shaft body along the axial direction from the vaporization chamber, and in the meantime, A spiral refrigerant gas flow passage for performing heat exchange action by a medium gas, and the refrigerant gas sent to the base end portion of the cylindrical body through the spiral flow passage to the refrigerant discharge pipe through the connection body. It proposes a heat exchange device configured to discharge.

[0009]

According to the above-mentioned structure of the present invention, the refrigerant liquid is introduced into the shaft hole of the shaft body through the connecting body, and the refrigerant liquid is vaporized in the vaporization chamber provided in the innermost portion of the cylindrical body. The gasified refrigerant passes through the spiral refrigerant gas flow passage, where heat exchange is performed, and the refrigerant gas that has completed the heat exchange is discharged to the refrigerant discharge pipe through the connection body. Therefore, the gasified refrigerant passes through the spiral refrigerant gas flow passage so as to be pushed out from the innermost portion of the cylindrical body, and the heat exchange action is sufficiently performed in the flow passage having the increased heat exchange device area. In addition, since the refrigerant gas that has completed the function of the heat exchange device is returned to the same connection body that introduces the refrigerant, the cylinder body need only be a linear structure, and the diameter and length of the cylinder body can be reduced. Therefore, the device can be easily downsized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a temperature control system in which a cooler 2 provided with a heat exchange device 1 of the present invention is connected to a water tank 3 such as a cage. In the tubular or cylindrical casing 4 forming the heat exchange portion of the cooler 2, a tubular body 5 forming the heat exchange portion of the heat exchange device 1 is inserted along the axial direction thereof. From the inlet 6 of the casing 4 to the water tank 3,
For example, seawater 6 serving as a heat exchange medium is caused to flow in through the pump 7 and flows around the cylindrical body 5 in the axial direction of the casing 4, and the cylindrical body 5 causes heat exchange to cool the seawater 6. The water is returned from the other end outlet 8 of the casing to the water tank 3. In this way, the temperature of seawater is controlled by circulating the seawater 6 in the water tank 3.

Freon (trade name) gas, for example, is supplied to the heat exchange device 1 as a refrigerant by a conventional heat pump system 10 provided in the cooler 2 from a refrigerant supply pipe 11 through a connecting body 12 of the device 1. At the same time, the refrigerant that has completed heat exchange is discharged from the connector 12 to the refrigerant discharge pipe 13 and returned to the heat pump system.

Referring to FIG. 2, the heat exchange device shown in FIG. 1 will be further described. The cylindrical body 5 is closed at its tip end 5a on the left side in the drawing into a blind hole shape, while the base end part 5b on the right side in the figure is opened and a flange 15 is integrally formed on the periphery. Cylinder 5
Since the outer peripheral surface 5c is placed in direct contact with the heat exchange medium, in the case of the present embodiment, it is integrally formed of titanium having high corrosion resistance in view of handling seawater.

The connecting body 12 has a branch bolt member 16 and a cap nut member 17. The branch bolt member 16 has a threaded portion 16a on the outer peripheral surface thereof and a communication space 16b having one end open therein. The communication space 16b is the discharge opening 1
It communicates with the refrigerant discharge pipe 13 at 6c. The cap nut member 17 is fitted to the outer peripheral portion of the tubular body 5 and has a screw portion 17a corresponding to the screw portion 16a of the branch bolt member 16. By screwing both screw portions 16a and 17a as shown in the drawing, contacting the flange 15 between the branch bolt member 16 and the base end portion 5b of the tubular body 5, interposing the seal packing 18, and tightening the cap nut member 17. , The branch bolt member 1
6 is connected to the base end portion 5b of the tubular body, and the internal space 16b communicates with the tubular body 5.

Reference numeral 20 denotes a shaft body inserted through the opening of the base end portion 5b of the cylindrical body 5, and has a shaft hole 20a whose both ends are open along the axial direction, and a spiral in which a mountain portion and a valley portion are successively connected to the outer peripheral portion. The concave-convex portion 20b is integrally formed. As this material, brass that is easy to process is desirable. The shaft body 20 is formed in such a size that the peak portion of the spiral concave-convex portion 20b fits snugly on the inner peripheral surface of the cylindrical body 5, and when inserted as shown in the figure, the outer peripheral surface of the shaft body 20 and the cylindrical body are A spiral refrigerant gas flow passage 21 is formed between the body 5 and the inner peripheral surface thereof. The shaft 20
After inserting, the tube body 5 is slightly pressed by a press to ensure the fitting of the two.

The insertion end of the shaft 20 and the tip 5a of the tubular body 5
A vaporization chamber 22 having a predetermined length, which is indicated by a length dimension A in the drawing, is formed between the inner rear end and the inner rear end. A refrigerant introduction pipe 23 having an inner diameter of about 1 mm is inserted and fitted over the shaft hole 20a and the internal space 16b of the connection body 12, and after installation, the pipe 23
The shaft 20 and one end (left side) of the shaft 20 are opened in the vaporization chamber 22, and the other end (right end) forms a part of the medium supply pipe 11. Therefore, the refrigerant is the heat pump system 1
From 0, it is sent through the pipe in the form of a refrigerant liquid, passes through the refrigerant introduction pipe 23 and enters the vaporization chamber 22, where it is vaporized as the volume increases. Since the supplied coolant liquid flows through the pipe 23, it is in a state of being isolated from the internal space 16b of the branch bolt member 16.

In the embodiment, the refrigerant introducing pipe 23 has a long structure which is also inserted into the shaft hole 20a of the shaft body 20 as shown in the drawing.
One end of the shaft hole 2 is provided at the base end side (right end side) of the shaft body 20.
0a and the other end of the branch bolt member 1
It is also possible to extend outside through the inner space 16b of 6 and communicate with a separate medium supply pipe 11. In this case, the inner diameter of the shaft hole 20a may be matched with the inner diameter of the pipe.
In addition, a passage isolated from the internal space 16b is formed in the branch bolt member 16, and one end of this passage is formed in the shaft hole 20a.
Piping 1 whose other end is connected to the branch bolt member 16 from the outside
It is also possible to have a configuration in which the communication with 1 is established.

As described above, the internal space 16b of the branch bolt member 16 is isolated from the refrigerant introduction side passage and acts as a passage for the discharged refrigerant gas. That is, the space 1
6b communicates with one end of the spiral refrigerant gas passage 21 and also communicates with the refrigerant discharge pipe 13. Although the pipe 13 is shown as being integrated with the branch bolt member 16 in the figure, the pipe 13 is actually formed as a pipe and is welded at the discharge opening 16c. It is designed to be one.

As the material of the branch bolt member 16, the cap nut member 17 and the refrigerant introducing pipe 23 forming the connecting body 12, brass, copper or the like, which is excellent in workability and weldability, is selected.

The heat exchange device 1 of the present invention having the above structure
In, when the refrigerant is supplied through the refrigerant supply pipe 11, the refrigerant flows in one direction in the form of a refrigerant liquid through the introduction pipe 23 from the connector 12 to the shaft hole 20 of the shaft body 20.
It is discharged from the insertion end of the shaft body 20 into the vaporization chamber 22 through a. As a result, the refrigerant liquid is vaporized in the vaporization chamber 22 along with the change in the volume, and the gasified refrigerant (refrigerant gas) is sent from the vaporization chamber 22 into the spiral refrigerant gas flow passage 21. While swirling around the shaft body 20 along the spiral passage of the flow passage 21, it is in a counterflow direction in the axial direction, in the direction opposite to the refrigerant introduction direction, in other words, toward the base end side of the tubular body 5. Shed The spiral refrigerant gas flow passage 21
Has a large contact area with the refrigerant gas, and the shaft body 20 has a sufficient mass to absorb and store heat, so that the cooling heat of the refrigerant gas is sufficiently absorbed,
While the refrigerant gas passes through the passage 21, positive and effective heat exchange is performed with the seawater of the outer heat exchange medium that contacts the outer peripheral surface 5c of the tubular body 5. Then, after the heat exchange is completed, the refrigerant gas exits from the spiral refrigerant gas flow passage 21 at the base end portion 5b of the tubular body 5 as shown by the arrow and flows into the internal space 16b of the connector 12.
As a result, the refrigerant is discharged to the refrigerant discharge pipe 13.

The refrigerant gas is positively sent without staying in the spiral refrigerant gas flow passage 21 because the hydraulic pressure of the refrigerant liquid introduced through the shaft hole 20a of the shaft body 20 constantly acts. Therefore, efficient heat exchange is performed over the entire length of the tubular body 5. It is sufficient for the vaporization chamber 22 to have a sufficient space for vaporizing the introduced refrigerant liquid here. For example, when the inner diameter of the cylindrical body 5 is 15 mm, the length dimension A
About 10 mm is sufficient. As a minimum dimension, one thread of the spiral irregularities 20b on the outer periphery of the shaft body 20, which is about 5 mm, can achieve the effect.

In the embodiment, the spiral refrigerant gas flow passage 21
Was formed by forming the spiral uneven portion 20b on the outer peripheral portion of the shaft body 20, on the contrary, the spiral uneven portion is formed on the inner peripheral surface side of the cylindrical body 5, and a flat outer peripheral surface is formed on the spiral uneven portion. A configuration in which a shaft body having the above is engaged is also possible and is included in the technical idea of the present invention. However, the structure of this embodiment is more preferable because it is easy to manufacture and can be manufactured at low cost.

Further, when the heat exchange medium is seawater or the like, the material of the tubular body 5 is preferably titanium, which has high corrosion resistance as in the embodiment, but other plastics or other metals can also be used. However, the present invention is not limited to the configuration of the embodiment.

[0023]

As described above, according to the heat exchange device of the present invention, the supply and the discharge of the refrigerant are performed through the same connecting body,
The refrigerant liquid is introduced along one direction of the axis of the cylinder to the vaporization chamber provided in the inner part of the cylinder, where the refrigerant gas is generated,
Since the refrigerant gas is sent into the spiral refrigerant gas flow passage and is caused to flow in the opposite direction along the other direction of the axis of the cylinder, the cylinder has a linear simple shape and a small diameter, and The refrigerant gas is pushed by the liquid pressure of the introduced refrigerant liquid and forcedly flows in the spiral refrigerant gas flow passage, so that a positive and efficient heat exchange action can be achieved, and the length dimension of the cylindrical body can be further reduced. Even if shortened, sufficient efficiency can be obtained. Therefore,
The heat exchange device has various effects such as the miniaturization design of the entire heat exchange device being extremely easy, the structure being simple, and being inexpensively manufactured.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment in which the heat exchange device of the present invention is embodied in a temperature control system for a water tank such as a cage.

FIG. 2 is a vertical cross-sectional view showing the heat exchange device of the present invention shown in FIG. 1 taken out.

[Explanation of symbols]

 1 Heat Exchanger 2 Cooler 5 Cylindrical Body 12 Connection Body 20 Shaft Body 21 Spiral Refrigerant Gas Flow Path 22 Vaporization Chamber

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[Procedure amendment]

[Submission date] November 30, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Heat exchange device

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a temperature control system in which a cooler 2 provided with a heat exchange device 1 of the present invention is connected to a water tank 3 such as a cage. In the tubular or cylindrical casing 4 forming the heat exchange portion of the cooler 2, a tubular body 5 forming the heat exchange portion of the heat exchange device 1 is inserted along the axial direction thereof. From the inlet 6 of the casing 4 to the water tank 3,
For example, seawater 9 serving as a medium to be heat-exchanged is caused to flow in through the pump 7 to flow around the cylindrical body 5 in the axial direction of the casing 4, and heat is exchanged by the cylindrical body 5 to cool the seawater 9, The water is returned from the other end outlet 8 of the casing to the water tank 3. In this way, the temperature of seawater is controlled by circulating the seawater 9 in the water tank 3.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Claims] 1. A cylindrical body having an outer peripheral surface that is placed in contact with a heat exchange medium such as seawater, the proximal end portion of which is open, and the distal end portion of which is closed; and the cylindrical body which is inserted through the opening of the cylindrical body. And a refrigerant supply pipe and a refrigerant discharge pipe which are provided at the base end of the cylindrical body and have a shaft hole with both ends open, and one end opening of the shaft hole of the shaft body is connected to the refrigerant supply pipe. Is formed between an insertion end portion of the shaft body and an inner inner end of the tip end portion of the cylindrical body, and is introduced into the shaft hole of the shaft body. A vaporization chamber that vaporizes the generated refrigerant liquid to generate a refrigerant gas, and is formed between the outer peripheral portion of the shaft body and the inner peripheral portion of the cylindrical body, and the refrigerant gas from the vaporization chamber along the axial direction. A spiral refrigerant that circulates around the shaft in a spiral shape and performs heat exchange action by the refrigerant gas in the meantime. And a gas flow passage,
A heat exchange device in which the refrigerant gas sent to the base end portion of the cylindrical body through the spiral flow passage is discharged to the refrigerant discharge pipe through the connection body.