JP2015068606A - Immersion type liquid cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that in a conventional immersion type liquid cooling device, sufficient coating may not be performed to the outer peripheral surface of an inside refrigerant pipeline and the inner peripheral surface of an outside refrigerant pipeline.SOLUTION: An immersion type liquid cooling device includes an inside refrigerant pipeline 17 (first refrigerant pipeline) wound into a spiral shape along a vertical direction (predetermined direction), and an outside refrigerant pipeline 18 (second refrigerant pipeline) surrounding the inside refrigerant pipeline 17 and wound into a spiral shape along the vertical direction. At a predetermined circumferential position, a pipe center position C1 of the inside refrigerant pipeline 17 and a pipe center position C2 of the outside refrigerant pipeline 18 are displaced in the vertical direction (predetermined direction).

Description

  The present invention relates to an immersion type liquid cooling apparatus that immerses an evaporator in a liquid and cools the liquid.

  The liquid cooling device is a device for cooling, for example, a grinding fluid of a machine tool such as a grinding machine or a machining center, a spindle lubricating oil (hereinafter referred to as “machine fluid”). This liquid cooling device includes a refrigerant circuit connected to a compressor, a condenser, an expansion valve, and an evaporator, and cools the working fluid (liquid) in the evaporator.

  As one form of the conventional liquid cooling device, there is one in which an evaporator and a pump for conveying a working fluid are accommodated in the device (see, for example, Patent Document 1). The liquid cooling device is a circulation type liquid cooling device that is disposed at a position away from a tank in which the working fluid is stored and circulates the working fluid with a pump for conveying the working fluid. Therefore, in this liquid cooling device, the working fluid is guided from the tank into the device, and the working fluid is cooled in the device.

  Moreover, as another form of the conventional liquid cooling device, the evaporator has a coil portion disposed below the bottom surface of the device main body that houses the compressor, the condenser, and the expansion valve. There is an immersion liquid cooling device that is immersed in a working fluid stored in a tank. In this immersion type liquid cooling device, the working fluid is directly cooled in the tank.

  In this immersion type liquid cooling device, as shown in FIG. 7A, the coil portion 51 surrounds the inner refrigerant pipe 52 and the inner refrigerant pipe 52 that are spirally wound along the vertical direction, and the vertical direction. And an outer refrigerant pipe 53 that is spirally wound along. Then, at a predetermined circumferential position, the pipe center position C11 of the inner refrigerant pipe 52 and the pipe center position C12 of the outer refrigerant pipe 53 are arranged at substantially the same position in the vertical direction.

Japanese Patent Publication No. 8-22363

  By the way, in the above immersion type liquid cooling device, in order to prevent dirt such as grinding dust contained in the working fluid from adhering to the inner refrigerant pipe and the outer refrigerant pipe, for example, fluorine paint or the like is applied to the inner refrigerant pipe and the outer refrigerant pipe. The paint is painted by spraying or brush painting. Specifically, the paint is applied by spraying a paint in a substantially horizontal direction from the inside of the inner refrigerant pipe and the outside of the outer refrigerant pipe, or by painting the paint from the inside of the inner refrigerant pipe and the outside of the outer refrigerant pipe. However, in the above immersion type liquid cooling device, the pipe center position of the inner refrigerant pipe and the pipe center position of the outer refrigerant pipe are arranged at substantially the same position in the vertical direction at a predetermined circumferential position. When the paint is applied from the inside and the outside of the outer refrigerant pipe, the paint may not be sufficiently applied to the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

  Accordingly, an object of the present invention is to provide an immersion type liquid cooling apparatus including an evaporator that easily paints the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

  An immersion liquid cooling apparatus according to a first aspect of the invention includes a refrigerant circuit connected to a compressor, a condenser, an expansion valve, and an evaporator, and the immersion liquid cooling is performed by immersing the evaporator in a liquid to cool the liquid. It is an apparatus, Comprising: The said evaporator is provided with the coil part arrange | positioned below the bottom face of the apparatus main body which accommodates the said compressor, the said condenser, and the said expansion valve, The said coil part is along a predetermined direction. A first refrigerant pipe wound spirally; and a second refrigerant pipe surrounding the first refrigerant pipe and spirally wound along the predetermined direction. The center position of the first refrigerant pipe and the center position of the second refrigerant pipe are shifted in the predetermined direction.

  In this immersion liquid cooling device, the pipe center position of the inner refrigerant pipe (first refrigerant pipe) and the outer refrigerant pipe (second refrigerant pipe) wound spirally along the predetermined direction at a predetermined circumferential position. Since the center position of the pipe is shifted in a predetermined direction, it is easy to paint the outer peripheral surface of the inner refrigerant pipe and the inner peripheral face of the outer refrigerant pipe. Therefore, it is possible to provide an immersion type liquid cooling device including an evaporator that easily paints the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

  An immersion type liquid cooling apparatus according to a second aspect of the present invention is the immersion type liquid cooling apparatus according to the first aspect of the present invention, wherein the center position of the second refrigerant pipe and the first refrigerant pipe are at a predetermined circumferential position. It does not overlap in the predetermined direction.

  In this immersion liquid cooling device, the pipe center position of the outer refrigerant pipe (second refrigerant pipe) and the inner refrigerant pipe (first refrigerant pipe) do not overlap in the predetermined direction at the predetermined circumferential position. A portion where the inner refrigerant pipe and the outer refrigerant pipe overlap can be reduced. Therefore, it is easy to paint the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, the pipe center position of the inner refrigerant pipe (first refrigerant pipe) and the pipe of the outer refrigerant pipe (second refrigerant pipe) wound spirally along the predetermined direction at a predetermined circumferential position. Since the center position is deviated in a predetermined direction, it is easy to paint the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe. Therefore, it is possible to provide an immersion type liquid cooling device including an evaporator that easily paints the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

  In the second invention, the pipe center position of the outer refrigerant pipe (second refrigerant pipe) and the inner refrigerant pipe (first refrigerant pipe) do not overlap in the predetermined direction at the predetermined circumferential position. A portion where the piping and the outer refrigerant piping overlap can be reduced. Therefore, it is easy to paint the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

It is a block diagram of the immersion type liquid cooling device concerning embodiment of this invention. It is a perspective view when an immersion type liquid cooling device is installed in a tank. It is an internal block diagram when an immersion type liquid cooling device is seen from the side. It is a top view of an immersion type liquid cooling device. It is the VV sectional view taken on the line shown in FIG.3 and FIG.4. (A) is the elements on larger scale of the immersion type liquid cooling device shown in FIG. 5, (b) is the detailed figure which showed a part of (a) in detail. (A) is the schematic explaining the mode of the coating of the coating material in the past, (b) is the schematic explaining the mode of the coating of the coating in this embodiment. (A) is the schematic which showed the mode of the flow of the working fluid in the conventional tank, (b) is the schematic which showed the mode of the flow of the working fluid in the tank in this embodiment.

  Hereinafter, embodiments of an immersion liquid cooling apparatus according to the present invention will be described with reference to the drawings. The immersion liquid cooling apparatus will be described below with the vertical direction in FIG. 3 simply as the vertical direction and the direction orthogonal to the vertical direction as the horizontal direction.

  As shown in FIG. 1, the liquid cooling device of the present embodiment has a refrigerant circuit 7 in which a compressor 3, a condenser 4, an expansion valve 5, and an evaporator 6 are connected. In the refrigerant circuit 7, the condenser 4 is connected to the discharge port of the compressor 3, and the expansion valve 5 is connected to the condenser 4. Then, one end of the evaporator 6 is connected to the expansion valve 5, and the suction port of the compressor 3 is connected to the other end of the evaporator 6 via the accumulator 8. In this liquid cooling device, the refrigerant discharged from the compressor 3 sequentially flows to the condenser 4, the expansion valve 5, and the evaporator 6, and a cooling cycle is formed that returns to the compressor 3 via the accumulator 8.

  As shown in FIGS. 2 and 3, the liquid cooling apparatus is configured such that the evaporator 6 is disposed below the apparatus main body 1 that houses the compressor 3, the condenser 4, and the expansion valve 5. Is an immersion-type liquid cooling device that is immersed in the working fluid stored in the tank T. Therefore, in this liquid cooling device, the working fluid is cooled in the tank T. The apparatus main body 1 has a substantially rectangular parallelepiped shape, and has a plurality of legs 2 protruding downward from the bottom surface 1 f of the apparatus main body 1. An opening for inserting the evaporator 6 into the tank T is provided on the upper surface of the tank T, and the bottom surface 1f of the apparatus main body 1 is fixed around the opening. The tank T is closed except for the opening. Therefore, in a state where the liquid cooling device is fixed to the tank T, the evaporator 6 cannot be cleaned from the outside of the liquid cooling device. The tank T is provided with, for example, a pump for conveying the working fluid. As shown in FIGS. 1 and 2, the working fluid discharged from the machine tool is driven into the tank T by driving the pump. The machine fluid supplied and cooled in the tank T is supplied to the machine tool. The shape of the tank T is an example, and is not limited to the above.

  As shown in FIG. 3, the condenser 4 of the liquid cooling device is disposed on the front surface 1 a side and the bottom surface 1 f in the device main body 1. A blower fan 9 that supplies an air flow to the condenser 4 is disposed in the apparatus main body 1. The blower fan 9 is disposed so as to face the condenser 4 on the downstream side of the air flow of the condenser 4, for example. An electrical component 10 such as a control unit is disposed between the condenser 4 and the blower fan 9 and the upper surface 1 e of the apparatus main body 1. Moreover, the compressor 3 and the accumulator 8 (refer FIG. 1) are arrange | positioned in the airflow downstream of the ventilation fan 9. FIG. The compressor 3 and the accumulator 8 are disposed on a support base 11 attached to, for example, the back surface 1b of the apparatus main body 1. Therefore, the compressor 3 and the accumulator 8 are not disposed on the bottom surface 1f, and a space S1 having a predetermined size is provided between the support base 11 and the bottom surface 1f.

  As shown in FIGS. 3 and 4, the evaporator 6 of the liquid cooling device includes a coil portion 12 that is disposed vertically below the bottom surface 1 f of the device body 1. The coil portion 12 surrounds the inner refrigerant pipe 17 (first refrigerant pipe) wound spirally along the vertical direction (predetermined direction) and the inner refrigerant pipe 17 and spirally wound along the vertical direction. It has a rotated outer refrigerant pipe 18 (second refrigerant pipe). That is, the two refrigerant pipes 17 and 18 wound spirally are laminated in the horizontal direction. As a result, the heat exchanger efficiency is improved by increasing the surface area of the refrigerant pipes 17 and 18 while suppressing the length of the coil portion 12 from increasing in the vertical direction. The refrigerant pipes 17 and 18 are formed by branching one refrigerant pipe into two on the upstream side of the compressor 3 and the downstream side of the expansion valve 5, as shown in FIG. The refrigerant in the refrigerant pipes 17 and 18 flows from the expansion valve 5 toward the compressor 3.

  An agitator 13 for agitating the working fluid in the tank T is attached to the bottom surface 1 f of the apparatus main body 1. The stirrer 13 includes a stirring motor 14 fixed in the apparatus main body 1, a shaft portion 15 extending downward from the bottom surface 1 f of the device main body 1 from the stirring motor 14, and a stirring portion fixed to the tip of the shaft portion 15. 16. From the viewpoint of facilitating mixing of the working fluid by generating turbulent flow, the stirrer 13 is slightly inward of the coil portion 12 and with respect to the central axis O of the coil portion 12 as shown in FIG. Arranged at an eccentric position. Specifically, the shaft portion 15 of the stirrer 13 is arranged slightly eccentrically on the front side 1 a side with respect to the central axis O of the coil portion 12. In FIG. 4, in order to facilitate understanding of the invention, the apparatus main body 1, the condenser 4, and the stirrer 13 are indicated by a one-dot chain line, and other configurations accommodated in the apparatus main body 1 are omitted.

  Next, the coil part 12 of the evaporator 6 will be described in detail below. As shown in FIGS. 5 and 6, the inner refrigerant pipe 17 of the coil portion 12 has the same pipe diameter (pipe diameter D1) in the entire region (from the start of winding to the end of winding) and an equal pitch (pitch P1). ). In addition, the outer refrigerant pipe 18 of the coil portion 12 has the same pipe diameter (pipe diameter D2) and an equal pitch (pitch P2) in the entire region (from the start of winding to the end of winding). The pipe diameter D2 of the outer refrigerant pipe 18 is the same as the pipe diameter D1 of the inner refrigerant pipe 17, and the pitch P2 of the outer refrigerant pipe 18 is the same as the pitch P1 of the inner refrigerant pipe 17. Further, the number of turns of the outer refrigerant pipe 18 is the same as the number of turns of the inner refrigerant pipe 17. As shown in FIG. 3, the inner refrigerant pipe 17 and the outer refrigerant pipe 18 have the same central axis (center axis O), and the winding radius r2 of the outer refrigerant pipe 18 is the winding of the inner refrigerant pipe 17. It is larger than the turning radius r1.

  In the coil portion 12, as shown in FIGS. 5 and 6, the pipe center position C1 of the inner refrigerant pipe 17 and the pipe center position C2 of the outer refrigerant pipe 18 are in the vertical direction (predetermined direction) at a predetermined circumferential position. It is shifted to. In FIG. 6, for example, at the circumferential position S shown in FIG. 4 (an example of a predetermined circumferential position), the pipe center position C1 of the inner refrigerant pipe 17 and the pipe center position C2 of the outer refrigerant pipe 18 are shifted in the vertical direction. It shows that. In this coil part 12, since the pipe diameter D1 and pitch P1 of the inner refrigerant pipe 17 and the pipe diameter D2 and pitch P2 of the outer refrigerant pipe 18 are the same, the pipe center position C1 of the inner refrigerant pipe 17 and the outer refrigerant pipe, respectively. The pipe center position C2 is always deviated from the pipe center position C2 by a certain amount in the vertical direction in the entire area of the inner refrigerant pipe 17 and the outer refrigerant pipe 18 (from the start of winding to the end of winding) at a predetermined circumferential position. In the present embodiment, the predetermined circumferential position indicates an arbitrary circumferential position.

  In the coil portion 12, as shown in FIG. 6, for example, at the circumferential position S shown in FIG. 4, the pipe center position C2 of the outer refrigerant pipe 18 and the inner refrigerant pipe 17 do not overlap in the vertical direction. Specifically, as shown in FIG. 6B, the pipe center position C2 of the outer refrigerant pipe 18 is disposed in a range W between the inner refrigerant pipes 17 adjacent in the vertical direction. Therefore, the portion where the inner refrigerant pipe 17 and the outer refrigerant pipe 18 overlap in the vertical direction is small.

  Here, FIG. 7 is a schematic diagram illustrating the state of painting of the paint in the conventional and the present embodiment. A portion indicated by a dot in FIG. 7 is a paint (fluorine paint) painted on the inner refrigerant pipe and the outer refrigerant pipe. Conventionally, in this liquid cooling device, as shown by arrows in FIG. 7, fluorine paint is sprayed in a substantially horizontal direction from the inside of the inner refrigerant pipe and from the outer side of the outer refrigerant pipe, so that the inner refrigerant pipe and the outer refrigerant pipe are directed. Painted with fluorine paint. However, in the conventional liquid cooling device, as shown in FIG. 7A, the pipe center position C11 of the inner refrigerant pipe 52 and the pipe center position C12 of the outer refrigerant pipe 53 are arranged at substantially the same position in the vertical direction. Therefore, when the fluorine paint is sprayed from the inside of the inner refrigerant pipe 52 and the outside of the outer refrigerant pipe 53, the fluorine paint is applied to the inner peripheral surface of the inner refrigerant pipe 52 and the outer peripheral face of the outer refrigerant pipe 53. The outer peripheral surface 52a of the inner refrigerant pipe 52 and the inner peripheral surface 53a of the outer refrigerant pipe 53 may not be sufficiently coated with fluorine paint. On the other hand, in the liquid cooling device of the present embodiment, as shown in FIG. 7B, the pipe center position C1 of the inner refrigerant pipe 17 and the pipe center position C2 of the outer refrigerant pipe 18 are shifted in the vertical direction. When the fluorine paint is sprayed from the inside of the inner refrigerant pipe 17 and the outside of the outer refrigerant pipe 18, the fluorine paint is likely to be sprayed between the outer peripheral surface 17 a of the inner refrigerant pipe 17 and the inner peripheral face 18 a of the outer refrigerant pipe 18. . Therefore, the fluorine paint is sufficiently applied to the outer peripheral surface 17 a of the inner refrigerant pipe 17 and the inner peripheral surface 18 a of the outer refrigerant pipe 18.

  FIG. 8 is a schematic diagram for explaining the flow of the working fluid in the prior art and the present embodiment. The solid line arrow in FIG. 8 is the flow of the working fluid. In the conventional liquid cooling apparatus, as shown in FIG. 8A, the pipe center position C11 of the inner refrigerant pipe 52 and the pipe center position C12 of the outer refrigerant pipe 53 are arranged at the same position in the vertical direction. Is driven, the working fluid in the tank flows in a substantially horizontal direction from the inner side of the inner refrigerant pipe 52 toward the outer side of the outer refrigerant pipe 53, for example, as indicated by solid arrows. Therefore, the flow of the working fluid is not so much between the outer peripheral surface 52 a of the inner refrigerant pipe 52 and the inner peripheral surface 53 a of the outer refrigerant pipe 53, and the outer peripheral surface 52 a of the inner refrigerant pipe 52 and the inner peripheral surface of the outer refrigerant pipe 53. In 53a, there is a possibility that heat cannot be exchanged efficiently. On the other hand, in the liquid cooling device of the present embodiment, as shown in FIG. 8B, the pipe center position C1 of the inner refrigerant pipe 17 and the pipe center position C2 of the outer refrigerant pipe 18 are shifted in the vertical direction. When the agitator 13 is driven, the working fluid in the tank flows in a substantially horizontal direction from the inner side to the outer side of the inner refrigerant pipe 17, for example, as indicated by a solid arrow, and then flows to the inner peripheral surface 18 a of the outer refrigerant pipe 18. Colliding and branching above and below the outer refrigerant pipe 18. Accordingly, a large amount of working fluid also flows between the outer peripheral surface 17 a of the inner refrigerant pipe 17 and the inner peripheral surface 18 a of the outer refrigerant pipe 18, and the outer peripheral surface 17 a of the inner refrigerant pipe 17 and the inner peripheral surface 18 a of the outer refrigerant pipe 18. Efficient heat exchange.

  Moreover, although illustration is abbreviate | omitted, in the immersion type liquid cooling device conventionally, the inner side refrigerant | coolant piping and the outer side refrigerant | coolant piping are cleaned with the brush. Therefore, in the conventional liquid cooling device, the pipe center position of the inner refrigerant pipe and the pipe center position of the outer refrigerant pipe are arranged at substantially the same position or the same position in the vertical direction. It is difficult for brushes or the like to reach the inner peripheral surface of the pipe, and it is difficult to clean the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe. However, in the liquid cooling device of the present embodiment, the pipe center position of the inner refrigerant pipe and the pipe center position of the outer refrigerant pipe are shifted in the vertical direction, so the outer peripheral surface of the inner refrigerant pipe and the inner circumference of the outer refrigerant pipe Easy to clean the surface.

<Characteristics of Submerged Liquid Cooling Device of this Embodiment>
The immersion type liquid cooling apparatus of the present embodiment has the following characteristics.

  In the immersion type liquid cooling apparatus of the present embodiment, the pipe center position C1 of the inner refrigerant pipe 17 (first refrigerant pipe) and the pipe center of the outer refrigerant pipe 18 (second refrigerant pipe) at a predetermined (arbitrary) circumferential position. Since the position C2 is displaced in the vertical direction, it is easy to paint the outer peripheral surface 17a of the inner refrigerant pipe 17 and the inner peripheral surface 18a of the outer refrigerant pipe 18. Therefore, it is possible to provide an immersion type liquid cooling device including the evaporator 6 that easily paints the outer peripheral surface 17a of the inner refrigerant pipe 17 and the inner peripheral surface 18a of the outer refrigerant pipe 18. In addition, since the pipe center position C1 of the inner refrigerant pipe 17 and the pipe center position C2 of the outer refrigerant pipe 18 are displaced in the vertical direction, the heat exchange efficiency can be improved, and the outer peripheral surface 17a of the inner refrigerant pipe 17 and the outer refrigerant. It is easy to clean the inner peripheral surface 18a of the pipe 18 with a brush or the like.

  Further, in the immersion type liquid cooling apparatus of the present embodiment, the pipe center position C2 of the outer refrigerant pipe 18 (second refrigerant pipe) and the inner refrigerant pipe 17 (first refrigerant pipe) at a predetermined (arbitrary) circumferential position. Are not overlapped in the vertical direction (predetermined direction), the portion where the inner refrigerant pipe 17 and the outer refrigerant pipe 18 overlap in the vertical direction can be reduced. Therefore, it is easy to paint the outer peripheral surface 17 a of the inner refrigerant pipe 17 and the inner peripheral surface 18 a of the outer refrigerant pipe 18.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  In the above embodiment, since the pipe diameter D1 and pitch P1 of the inner refrigerant pipe 17 and the pipe diameter D2 and pitch P2 of the outer refrigerant pipe 18 are the same, the pipe center position C1 of the inner refrigerant pipe 17 and the outer refrigerant pipe 18 respectively. The pipe center position C2 is shifted in the vertical direction in the entire area of the inner refrigerant pipe 17 and the outer refrigerant pipe 18 (from the start of winding to the end of winding) at a predetermined (arbitrary) circumferential position. However, in the present invention, “the center position of the inner refrigerant pipe (first refrigerant pipe) and the center position of the outer refrigerant pipe (second refrigerant pipe) are shifted in the vertical direction (predetermined direction) at a predetermined circumferential position. The phrase “has” is not limited to the above, and includes, for example, the following cases. For example, the pitch of the inner refrigerant pipe is different from the pitch of the outer refrigerant pipe, so that the pipe center position of the inner refrigerant pipe and the pipe center position of the outer refrigerant pipe are the inner refrigerant pipe at a predetermined circumferential position. In addition, the whole or part of the outer refrigerant pipe may be displaced in the vertical direction. In the above embodiment, the inner refrigerant pipe 17 has an equal pitch (pitch P1) and the outer refrigerant pipe 18 has an equal pitch (pitch P2). However, at least one of the inner refrigerant pipe 17 and the outer refrigerant pipe 18 is Instead of equal pitches, the tube center position of the inner refrigerant pipe and the tube center position of the outer refrigerant pipe at the predetermined circumferential position are the entire area of the inner refrigerant pipe and the outer refrigerant pipe at the predetermined circumferential position or Some may be displaced in the vertical direction.

  Further, in the above embodiment, the number of turns of the inner refrigerant pipe 17 and the number of turns of the outer refrigerant pipe 18 are the same, but the number of turns of the inner refrigerant pipe 17 may be larger than that of the outer refrigerant pipe 18, The winding number of the outer refrigerant pipe 18 may be larger than that of the inner refrigerant pipe 17.

  Moreover, in the said embodiment, when coating a coating material by spray coating, it demonstrated that it was easy to paint a coating material with respect to the outer peripheral surface 17a of the inner side refrigerant | coolant piping 17, and the inner peripheral surface 18a of the outer side refrigerant | coolant piping 18. FIG. However, even when the paint is applied by brush painting, the brush can easily reach the outer peripheral surface 17a of the inner refrigerant pipe 17 and the inner peripheral surface 18a of the outer refrigerant pipe 18, so that the outer peripheral surface 17a and the outer refrigerant pipe 18 of the inner refrigerant pipe 17 can be obtained. The effect that it is easy to paint the inner peripheral surface 18a of the paint can be obtained.

  Moreover, in the said embodiment, although pipe center position C2 of the outer side refrigerant | coolant piping 18 and the inner side refrigerant | coolant piping 17 do not overlap in an up-down direction, they may overlap.

  Moreover, in the said embodiment, although the inner side refrigerant | coolant piping 17 and the outer side refrigerant | coolant piping 18 are spirally wound along the up-down direction, it is not restricted to it, For example, it winds helically along a horizontal direction It may be what was done. That is, in the present invention, the “predetermined direction” may be any direction.

  In the above embodiment, the inner refrigerant pipe 17 and the outer refrigerant pipe 18 have the same central axis (central axis O), but the central axis of the inner refrigerant pipe 17 and the central axis of the outer refrigerant pipe 18 are different. It may be.

  If the present invention is used, it is possible to easily paint the outer peripheral surface of the inner refrigerant pipe and the inner peripheral surface of the outer refrigerant pipe.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 1f Bottom face 3 Compressor 4 Condenser 5 Expansion valve 6 Evaporator 7 Refrigerant circuit 12 Coil part 17 Inner refrigerant | coolant piping (1st refrigerant | coolant piping)
18 Outer refrigerant piping (second refrigerant piping)

Claims (2)

A submerged liquid cooling device comprising a refrigerant circuit connected to a compressor, a condenser, an expansion valve, and an evaporator, wherein the evaporator is immersed in a liquid to cool the liquid,
The evaporator includes a coil portion disposed below the bottom surface of the apparatus main body that houses the compressor, the condenser, and the expansion valve,
The coil portion is
A first refrigerant pipe spirally wound along a predetermined direction;
A second refrigerant pipe surrounding the first refrigerant pipe and spirally wound along the predetermined direction;
An immersion type liquid cooling apparatus, wherein a pipe center position of the first refrigerant pipe and a pipe center position of the second refrigerant pipe are shifted in the predetermined direction at a predetermined circumferential position. 2. The immersion liquid cooling apparatus according to claim 1, wherein a pipe center position of the second refrigerant pipe and the first refrigerant pipe do not overlap in the predetermined direction at a predetermined circumferential position.

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