JP7453947B2 - Cooling system - Google Patents

Description

The present invention relates to a cooling device that brings a drive element of a flow rate regulating valve into contact with a heat receiving part.

Electric vehicles and hybrid vehicles are equipped with heat-generating components such as motors and inverters, and large computer systems and servers are equipped with heat-generating components such as CPUs and memory that generate a large amount of heat. .

In order to cool these heat-generating components, a water-cooled cooling device is used, which has a relatively small number of components, is lightweight, and has high reliability. This water-cooled cooling device uses a pump to circulate a cooled refrigerant to cool an object.

For example, Patent Document 1 (see especially FIG. 10) describes a water-cooled cooling device including a pump that sends out a refrigerant in a predetermined direction, a cooler that allows the refrigerant to pass through and receives heat from an object to be cooled, and a refrigerant that passes through the refrigerant. A control unit controls the valve opening degree of the flow rate adjustment valve based on the outlet temperature of the cooler detected by a thermometer. It describes what to do.

Since this water-cooled cooling device controls the valve opening of the flow rate adjustment valve via the control unit, the responsiveness of the valve opening to changes in the temperature of the object to be cooled has been low. Therefore, instead of electrically controlling the valve opening of the flow rate adjustment valve, the temperature of the object to be cooled is directly received by a temperature sensing part installed in the flow rate adjustment valve, and the valve opening of the flow rate adjustment valve is controlled. It is possible that

Here, although it is not a water-cooled type, Patent Document 2 (see especially FIG. 3) describes a flow rate regulating valve used in a refrigeration cycle, which uses a temperature sensing part to measure the temperature of the outlet piping of an evaporator to be cooled. A device is described in which the upper lid of the drive unit directly receives heat to control the valve opening degree of the flow rate regulating valve. Specifically, a recess corresponding to the shape of the outlet piping of the evaporator, which is the object to be cooled, is provided in the upper lid, which is the temperature-sensing part, and the recess of the upper lid is fixed directly to the outlet piping of the evaporator. This is intended to increase the responsiveness of the valve opening degree to changes in the temperature of the object.

However, the flow rate regulating valve of Patent Document 2 mainly had the following two problems. First, although this flow rate regulating valve directly receives the temperature of the object to be cooled only through the recessed portion of the upper lid, the portion of the upper lid other than the recessed portion is strongly influenced by the ambient temperature. For this reason, the problem of a delay in temperature-sensitive response (hereinafter referred to as "conventional problem (delay in temperature-sensing characteristic)") still occurred. Second, the depth of the recess formed in the top lid has structural limitations so as not to interfere with the diaphragm disposed inside the top lid. For this reason, a problem has arisen in that a relatively large installation space is required in the direction along the axial direction of the flow rate regulating valve (hereinafter referred to as "conventional problem (need for installation space in the axial direction)").

Japanese Patent Application Publication No. 2006-38302 JP2020-60356A

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device that improves the temperature sensitivity of a flow rate regulating valve and reduces the mounting height of the flow rate regulating valve.

In order to solve the above problems, a fluid sending means for sending a refrigerant in a predetermined direction, a heat receiving section that allows the refrigerant to pass through and receives heat from the object to be cooled, and adjusts the flow rate of the refrigerant passing according to the temperature of the object to be cooled. A cooling device comprising: a flow rate regulating valve for dissipating heat of the refrigerant; and a heat dissipating means for dissipating heat of the refrigerant; the fluid sending means, the heat receiving section, the flow regulating valve, and the heat dissipating means are connected to each other, and the refrigerant is circulated. The flow rate adjustment valve includes a first port into which the refrigerant is introduced, a valve port through which the refrigerant flowing from the first port passes, and a second port through which the refrigerant that has passed through the valve port is sent out. a valve housing having: a valve body movably provided in the valve housing to adjust the valve opening degree of the valve port; and a valve closing force applying means for applying a force in a predetermined valve closing direction to the valve body. , a driving element that drives the valve body, and the driving element partitions a temperature sensing part that forms an enclosed space in which the enclosed gas is enclosed, and a space into which the refrigerant is introduced from the enclosed space. and a sealing member capable of applying a valve-opening force to the valve body, the temperature-sensing part has a cylindrical shape with a bottom, and includes a flat plate part and a wall part, and the heat-receiving part has a bottom face and a wall part. The cooling device includes a recessed portion having side surfaces, and when the temperature sensing portion is accommodated in the recessed portion, the flat plate portion of the temperature sensing portion is brought into thermal contact with the bottom surface of the recessed portion.

Further, in the cooling device, the driving element further includes an upper lid and a lower lid that is the temperature sensing portion, and the outer peripheral edge of the sealing member is sandwiched between the upper lid and the lower lid. By doing so, a flange portion may be formed, and the height of the side surface rising from the bottom surface of the recessed portion may be equal to or less than the height of the wall portion of the temperature sensing portion in the axial direction.

Further, in the cooling device, the width of the bottom surface of the recess may be approximately the same as the width of the wall of the temperature sensing section.

Further, in the cooling device, the wall portion of the temperature sensing portion is connected to an enclosure tube that is sealed with the filling gas, and the heat receiving portion is configured to connect the temperature sensing portion to the recess. An escape groove may be formed to avoid interference with the enclosing tube during accommodation.

In the cooling device, the recess further includes, on the opening side of the side surface, a step portion whose diameter is larger than an inner diameter of the side surface, and an annular groove formed on an inner circumferential surface of the step portion. A retaining ring may be inserted into the annular groove after the temperature sensing section is accommodated in the recess, and the collar portion of the drive element may be fixed between the retaining ring and the recess. .

According to the present invention, it is possible to provide a cooling device that improves the temperature-sensitive characteristics of a flow rate regulating valve and reduces the mounting height of the flow rate regulating valve.

1 is a schematic diagram of a cooling device according to a first embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view showing the flow rate regulating valve of FIG. 1. FIG. FIG. 2 is a side view illustrating the flow rate adjustment valve installed in the cooler of FIG. Each figure shows a state in which a flow rate adjustment valve is attached to the top surface (comparative example). 4 is a partial enlarged view surrounded by a broken line IV (a) in FIG. 3, in which (a) shows a state in which the flange of the drive element is separated from the top surface of the cooler (this embodiment), and (b) shows a state in which the flange of the drive element is separated from the top surface of the cooler; FIG. Each figure shows a state in which the flange is in contact with the upper surface of the cooler (comparative example). It is a figure explaining the flow rate adjustment valve attached to the cooler concerning a 2nd embodiment, (a) is a side view (this embodiment) of the state where attachment direction is correct, (b) is (a) (c) is a top view of the cooler, and (c) is a side view (comparative example) in a state where the mounting direction is incorrect. It is a figure explaining the flow rate adjustment valve attached to the cooler concerning a 3rd embodiment, (a) is a side view of the state where the flow rate adjustment valve is fixed to the cooler, (b) is (a) ) respectively represent top views of the coolers.

Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6. However, the present invention is not limited to the aspects of this embodiment.

<About terms>
In this specification and claims, "top", "bottom", "right", and "left" refer to directions corresponding to side views of the drawings.

(First embodiment)
<About the cooling device>
A cooling device 1 according to a first embodiment of the present invention will be described using FIG. 1. Note that the straight arrow in the figure indicates the direction in which the refrigerant is fed.

The cooling device 1 includes a flow rate adjustment valve 100 that adjusts the flow rate of the refrigerant passing therethrough according to the temperature of the object A to be cooled, a cooler (heat receiving section) 200a that receives heat from the object A to be cooled, and a coolant (liquid refrigerant) that directs the refrigerant (liquid refrigerant) in a predetermined direction. The refrigerant is provided with a pump (fluid feeding means) 300 and a radiator (heat radiating means) 400 that radiates heat of the refrigerant, and these are connected in a ring to circulate the refrigerant. This cooling device 1 cools a cooling target A, which is a heat generating component (for example, a motor, an inverter, etc.) mounted on an electric vehicle, a hybrid vehicle, or the like. Alternatively, cooling target A, which is a heat-generating component (eg, CPU, memory, etc.) mounted on a large computer system, server, etc., is cooled. Hereinafter, each configuration of the cooling device 1 will be explained in order.

The flow rate regulating valve 100 has a diaphragm type drive element 40, the details of which will be described later. The primary side joint 10a of the flow rate adjustment valve 100 is connected to the outlet side piping of the cooler 200a, and the secondary side joint 10b of the flow rate adjustment valve 100 is connected to the inlet side piping of the radiator 400. In addition, the flow rate regulating valve 100 brings the driving element 40 into thermal contact with the cooler 200a, and detects the temperature of the object to be cooled A through the cooler 200a, thereby controlling the flow rate of the refrigerant passing through the cooler 200a. Adjustments are being made.

The cooler 200a is composed of a cold plate, etc., and has an internal flow path that meanders in a zigzag manner and an internal flow path provided with pins to collide with the refrigerant in order to promote heat exchange with the refrigerant. are doing. A cooling target A, which is a heat generating component, is placed in contact with one side of the cooler 200a, and a flow rate regulating valve 100 is placed in contact with the other side. Note that the cooler 200a in this embodiment may have any form as long as it can transfer heat from the object to be cooled A to the refrigerant by allowing the refrigerant to pass therethrough and receiving heat from the object to be cooled A. .

The pump 300 circulates a liquid refrigerant to cool the object A to be cooled. This refrigerant is an insulating refrigerant, such as pure water or a fluorine-based inert liquid (eg, Fluorinert (registered trademark), Galden (registered trademark), Novec (registered trademark)), or the like. The refrigerant of this embodiment is a liquid when passing through the cooler 200a and the flow rate adjustment valve 100, but is not limited to this, and is a liquid that transitions to a gas-liquid mixed state in a part of the flow path of the cooling device 1. It may be.

The radiator 400 is of an air cooling type that exchanges heat with the surrounding environment by natural convection or forced convection. The radiator 400 of this embodiment is an air-cooled type, but is not limited to this, and may be of any type as long as it can exchange heat with the surrounding environment, such as a water-cooled type or an oil-cooled type.

<About the cooling operation of the cooling device>
The refrigerant sent out by the pump 300 exchanges heat with the object A by passing through the cooler 200a provided so as to come into contact with the object A, then passes through the flow rate adjustment valve 100 and is cooled by the radiator 400. The heat is radiated and returns to the pump 300 again. At this time, the flow rate of the refrigerant passing through the cooler 200a is controlled by the flow rate adjustment valve 100. When the temperature of the object A to be cooled increases, more refrigerant flows through the cooler 200a; Adjustment is made so that a small amount of refrigerant flows into the container 200a.

Note that the cooling device 1 of this embodiment includes a pair of coolers 200a and a flow rate adjustment valve 100 for one pump 300 and radiator 400, but is not limited to this, for example. For one pump 300 and radiator 400, a plurality of coolers 200a and a plurality of flow rate regulating valves 100 may be provided in parallel, or a plurality of pumps 300 may be provided in series or in parallel.

<About the flow rate adjustment valve>
The flow rate regulating valve 100 will be explained using FIG. 2. Note that an axis L shown by a dashed line in the figure is the center line of the valve port 14, which will be described later, and corresponds to the moving direction of the valve body 20. The flow rate adjustment valve 100 mainly includes a valve housing 10, a valve body 20, an adjustment spring unit (valve closing force applying means) 30 that applies a force in a predetermined valve closing direction to the valve body 20, and a drive element 40. configured. Hereinafter, each configuration of the flow rate regulating valve 100 will be explained in order.

The valve housing 10 is made of a metal member such as SUS, and includes a first port 11 connected to the primary joint 10a, a second port 12 connected to the secondary joint 10b, and a valve chamber 13. be done. The first port 11 communicates with the valve chamber 13 , and a valve port 14 is formed between the valve chamber 13 and the second port 12 . The valve housing 10 also includes a bleed passage 15 for communicating the valve chamber 13 and the second port 12 even when the valve port 14 is closed by the valve body 20, and a bleed passage 15 that communicates the second port 12 with the second port 12, which will be described later. A pressure equalization path 16 communicating with the pressure chamber 45 is formed. Further, a guide hole 17 is formed in the valve housing 10 and opens from the second port 12 to the pressure equalizing chamber 45 side on the axis L of the valve port 14. It has a shape.

The valve body 20 has a flange portion 21, a conical needle portion 22, and an operating shaft 23. This valve body 20 is arranged within the valve housing 10. Specifically, in the valve body 20, the flange portion 21 is disposed within the valve chamber 13, the needle portion 22 is disposed within the valve port 14, and the operating shaft 23 is disposed within the second port 12 and the guide hole 17. will be placed in The operating shaft 23 is fitted into the inner peripheral surface of the guide hole 17 with a clearance therebetween. Thereby, the valve body 20 is accommodated in the guide hole 17 so as to be freely movable in the direction of the axis L, and the needle portion 22 adjusts the valve opening degree of the valve port 14 by this movement in the direction of the axis L.

The adjustment spring unit 30 includes an adjustment spring 31 made of a compression spring, and an adjustment screw 32 made of a metal member and screwed into the valve housing 10. The adjustment spring 31 is formed in a coil shape extending in the direction of the axis L, and is held between the flange portion 21 of the valve body 20 and the adjustment screw 32. By screwing this adjustment screw 32 into the valve housing 10 and adjusting the screwing amount of the adjustment screw 32, a predetermined valve closing force (biasing force) is applied to the valve body 20 via the adjustment spring 31. The valve opening pressure of the valve port 14 can be adjusted. After this valve opening pressure is set, the adjusting screw 32 and the valve housing 10 are fixed around the entire circumference by welding, adhesive, etc., and are hermetically sealed.

The drive element 40 includes an upper cover 41 and a lower cover 42 that are made of metal and constitute a case body, a diaphragm (sealing member) 43, a stopper 47, an enclosure tube 48, and an adsorbent encapsulation body 49.

The upper lid 41 has an annular plate portion with an opening formed therein, a cylindrical portion extending downward from the outer peripheral edge of the plate portion, and a flange portion extending outward from the lower end of the cylindrical portion. are doing. This upper cover 41 is airtightly fixed to the lower end of the valve housing 10 by caulking and brazing.

The lower lid 42 has a cylindrical shape with a bottom and includes a circular flat plate part (temperature sensing part) 42a, a wall part (temperature sensing part) 42b extending upward from the outer peripheral edge of the flat plate part 42a, and a wall part 42b. and a flange portion extending outward from the upper end of the flange. This flat plate portion 42a is in thermal contact with the object to be cooled A (see FIG. 1) and senses the temperature of the object to be cooled A. Further, the wall portion 42b is provided with a sealing tube 48 extending outward in order to fill the sealed chamber 46 with the filler gas 3, which will be described later. It will be sealed later. Note that although the encapsulation tube 48 of this embodiment extends outward, the present invention is not limited to this. For example, the encapsulation tube 48 may have a relatively short length and be substantially flush with the wall portion 42b. You can also use it as

The diaphragm 43 is capable of applying a valve opening force to the valve body 20, and the outer peripheral edge is sandwiched between the upper lid 41 and the lower lid 42, and then the diaphragm 43 is fixed airtight by welding or brazing to form the flange 44. This diaphragm 43 divides the inner space of the upper lid 41 into a pressure equalizing chamber 45, which is the space into which the refrigerant is introduced, and divides the inner space of the lower lid 42 into a sealed chamber 46, which is the enclosed space into which the enclosed gas 3 is enclosed.

The deposit 47 has a recessed portion at the top and a flat portion at the bottom. This stopper 47 is arranged within the pressure equalization chamber 45 , and its lower flat portion abuts against the diaphragm 43 , and its upper recessed portion connects with the operating shaft 23 of the valve body 20 .

The adsorbent encapsulating body 49 includes a bag-shaped partition member 49a made of nonwoven fabric or the like, and an adsorbent 49b such as granular activated carbon encapsulated in the partition member 49a. This adsorbent-containing body 49 is disposed within the sealed chamber 46 in which the sealed gas 3 is sealed, that is, in contact with the inner wall 42a1 of the flat plate portion 42a. Thereby, the adsorbent 49b is in thermal contact with the object A to be cooled.

The adsorbent 49b exhibits adsorption/desorption characteristics only for carbon dioxide with respect to the sealed gas 3. As a result, the sealed gas 3 has temperature-pressure characteristics such that when it is cooled, the amount of adsorption increases and the pressure inside the sealed chamber 46 decreases, and when it is heated, the amount of adsorption decreases and the pressure inside the sealed chamber 46 increases. have That is, the amount of adsorption of the filler gas 3 by the adsorbent 49b changes depending on the temperature. The sealed gas 3 of this embodiment uses carbon dioxide as the main component gas, helium as the leak detection gas, and employs a gas mixed with these gases, but is not limited thereto. For example, considering thermal stability, environmental load, etc., a filler gas 3 that exists in a gaseous state in the temperature range in which it will be used is selected, and an adsorbent 49b that adsorbs this filler gas 3 is also selected. good.

<About the operation of the flow rate adjustment valve>
In the flow rate adjustment valve 100, the refrigerant introduced into the primary joint 10a flows from the first port 11 into the valve chamber 13, and from the valve chamber 13 via the bleed passage 15, the second port 12, and the pressure equalization passage 16. It is introduced into the pressure equalization chamber 45. Furthermore, the refrigerant in the second port 12 is discharged from the secondary joint 10b. Thereby, a predetermined refrigerant flow rate can be obtained even when the valve port 14 is fully closed.

On the other hand, in the lower lid 42 of the drive element 40, when the pressure of the sealed gas 3 in the sealed chamber 46 increases or decreases depending on the temperature sensed by the flat plate portion 42a, the diaphragm 43 is displaced. With this displacement of the diaphragm 43, the operating shaft 23 of the valve body 20 moves in the direction of the axis L via the stopper 47, and the gap between the valve port 14 and the needle portion 22 of the valve body 20, that is, the valve opening. changes. The flow rate of the refrigerant flowing from the primary joint 10a to the secondary joint 10b is adjusted according to this valve opening degree, that is, the temperature of the object A to be cooled.

<About how to install the flow rate adjustment valve>
FIG. 3 is a diagram illustrating the flow rate adjustment valve 100 attached to the cooler 200a, (a) shows a state where the flow rate adjustment valve 100 is attached to the recess 210 of the cooler 200a (this embodiment), ) respectively represent a state (comparative example) in which the flow rate regulating valve 100 is mounted on the upper surface 201 of the cooler 200a'. Note that the coolers 200a and 200a' in the figure are shown as cross-sectional views for explanation. Further, the flow rate regulating valve 100 shown in the figure has an extremely short length of the sealed tube and is substantially flush with the wall portion 42b.

As shown in FIG. 3(a), the cooler 200a has a recess 210 consisting of a bottom surface 211 and side surfaces 212. In order to accommodate the drive element 40 of the flow rate regulating valve 100, the recess 210 has a shape (for example, a circular shape) corresponding to the outer shape of the drive element 40 when viewed from the axis L direction.

Thereby, the drive element 40 can be accommodated in the recess 210 when the flow rate adjustment valve 100 is mounted on the cooler 200a. Therefore, the installation height Z of the flow rate adjustment valve 100 in the direction of the axis L should be made lower than the installation height Z' of the flow rate adjustment valve 100 when the flow rate adjustment valve 100 is installed on the upper surface 201 of the cooler 200a'. Can be done. This eliminates the conventional problem (the need for installation space in the axial direction) and improves the degree of freedom in device layout.

Further, the wall portion 42b of the drive element 40 is housed so as to be surrounded by the side surface 212 of the recess 210. As a result, the wall portion 42b of the driving element 40 is less affected by the ambient temperature than in the comparative example shown in FIG. 3(b), so that the conventional problem (delay in temperature-sensitive characteristics) can be solved.

In this embodiment, the flat plate part 42a of the drive element 40 is brought into direct contact with the bottom surface 211 of the recessed part 210, but it is sufficient that the flat part 42a and the bottom surface 211 are brought into thermal contact, for example. , the flat plate portion 42a and the bottom surface 211 may be brought into thermal contact via heat transfer grease or the like.

<About the height of the side surfaces rising from the bottom of the recess>
FIG. 4 is a diagram illustrating the arrangement relationship between the flange 44 of the drive element 40 and the top surface 201 of the cooler 200a. FIG. Embodiment) and (b) each represent a state in which the flange portion 44 is in contact with the upper surface 201 of the cooler 200a (comparative example).

First, as shown in FIG. 2, the flat plate portion 42a and the wall portion 42b define a sealed chamber 46 in which the filler gas 3 is filled. Therefore, in order to reliably transfer the heat received by the cooler 200a from the object to be cooled A to the adsorbent 49b, it is necessary to increase the heat receiving area via the flat plate part 42a and the wall part 42b, which are temperature sensing parts. Become.

Therefore, as shown in FIG. 4(a), by setting the height Hr of the side surface rising from the bottom surface 211 to be less than or equal to the height Hd of the wall portion 42b of the flow rate regulating valve 100 in the axis L direction, the flange portion 44 is Since it is spaced apart from the upper surface 201 of the cooler 200a, the bottom surface 211 of the recessed portion 210 can be reliably brought into surface contact with the flat plate portion 42a. Thereby, the conventional problem (delay in temperature-sensitive characteristics) can be solved.

On the other hand, as shown in FIG. 4(b), when the height Hr' of the side surface rising from the bottom surface 211' is set to exceed the height Hd of the wall portion 42b of the flow rate regulating valve 100 in the axis L direction, the flange Since the portion 44 interferes with the upper surface 201 of the cooler 200a', the bottom surface 211' of the recessed portion 210' is separated from the flat plate portion 42a. As a result, the heat received by the cooler 200a' from the object to be cooled A cannot be directly transmitted to the flat plate portion 42a, resulting in a delay in the heat transmitted to the adsorbent 49b.

<About the width of the bottom of the recess>
As shown in FIG. 4A, the width Wr of the bottom surface 211 of the recess 210 is set to be approximately the same as the width Wd of the wall portion 42b. Here, when the width Wr of the bottom surface 211 is set to be the same as the width Wd of the wall portion 42b, the side surface 212 of the recessed portion 210 can be brought into surface contact with the wall portion 42b. Thereby, the heat received by the cooler 200a from the object to be cooled A can be added to the flat plate portion 42a and reliably transmitted to the adsorbent 49b via the wall portion 42b. Furthermore, even when the width Wr of the bottom surface 211 is set to be slightly larger than the width Wd of the wall portion 42b, it is possible to apply heat transfer grease or the like to the gap between the side surface 212 and the wall portion 42b in the same manner as described above. In addition, the heat received by the cooler 200a from the object to be cooled A can be applied to the flat plate portion 42a and reliably transmitted to the adsorbent 49b via the wall portion 42b.

In this way, the cooling device 1 of the present embodiment can reliably transfer the heat received by the cooler 200a from the object to be cooled A to the adsorbent 49b through the wall portion 42b in addition to the flat plate portion 42a. It is possible to solve the conventional problem (delay in temperature-sensing characteristics) and improve temperature-sensing characteristics.

As described above, in the first embodiment, it is possible to improve the degree of freedom in device layout and to improve the temperature sensing characteristics.

(Second embodiment)
The flow rate regulating valve 100 attached to the cooler 200b according to the second embodiment will be described using FIG. 5. Note that the flow rate regulating valve 100 in the figure is shown as having an enclosure tube 48 extending outward. The cooler 200b according to the second embodiment differs from the cooler 200a according to the first embodiment in that a relief groove 220 is provided in addition to the recess 210, but the other basic configuration is that of the first embodiment. is the same as Here, the same members are given the same reference numerals, and redundant explanations will be omitted.

First, in the first embodiment, when the flow rate adjustment valve 100 is installed in the cooler 200a, if the installation direction is correct, the primary side joint 10a of the flow rate adjustment valve 100 is attached as shown in FIG. 3(a). It is connected to the outlet side piping of the cooler 200a (the left side in FIG. 3(a)), and the secondary joint 10b is connected to the inlet side piping of the radiator 400 (the right side in FIG. 3(a)). However, during the installation work by a worker, there was a risk that the flow rate regulating valve 100 would be installed in the cooler 200a in the wrong state (left and right opposite). As a result, the flow of the refrigerant in the flow rate adjustment valve 100 becomes opposite, and there is a possibility that the desired flow rate adjustment cannot be performed.

Therefore, in the second embodiment, as shown in FIG. 5(a), an enclosure tube 48 for enclosing the enclosure gas 3 is provided in the wall portion 42b of the drive element 40 and extends outward. It is provided. In addition to the recess 210, the cooler 200b has a relief groove 220 connected to the recess 210. In order to accommodate the drive element 40 including the enclosure tube 48, the recess 210 and the escape groove 220 are designed to accommodate the outer shape of the drive element 40 including the enclosure tube 48 when viewed from the axis L direction, as shown in FIG. 5(b). It has a corresponding shape (for example, a shape that is a combination of a circular shape and a rectangular shape).

As a result, when the flow rate adjustment valve 100 is attached to the cooler 200b, the driving element 40 is accommodated in the recess 210, the sealed tube 48 is accommodated in the relief groove 220, and the sealed tube 48 is connected to the surface 201 of the cooler 200b. interference can be avoided.

Here, as shown in FIG. 5(c), even if the flow rate adjustment valve 100 is attached to the cooler 200b in the wrong direction (opposite left and right), the enclosing tube 48 will be attached to the upper surface 200 of the cooler 200b. This prevents incorrect installation direction. Moreover, since the worker can instantly visually confirm the correct mounting direction of the flow rate regulating valve 100, the efficiency of the mounting work can be improved.

As described above, in addition to the same effects as the first embodiment (increased freedom in equipment layout and improved temperature-sensing characteristics), the second embodiment also prevents mistakes in the mounting direction and improves the installation work. Efficiency can be improved.

(Third embodiment)
The flow rate regulating valve 100 attached to the cooler 200c according to the third embodiment will be described using FIG. 6. Note that, in FIG. 6(b), the flow rate adjustment valve 100 is omitted for the sake of explanation. The cooler 200c according to the third embodiment is different from the cooler 200b according to the second embodiment in that it has means for fixing the flow rate adjustment valve 100 in the recess 210, but the other basic configuration is the same as that of the cooler 200c according to the third embodiment. This is the same as the second embodiment. Here, the same members are given the same reference numerals, and redundant explanations will be omitted.

As shown in FIG. 6A, in the recess 210, a stepped portion 213 whose diameter is larger than the inner diameter of the side surface 212 is formed on the opening side of the side surface 212 rising from the bottom surface 211. As shown in FIG. An annular groove 214 is further formed on the inner peripheral surface of this stepped portion 213 . Here, the inner diameter of the stepped portion 213 is set larger than the outer diameter of the flange portion 44, and the height of the side surface 212 rising from the bottom surface 211 is equal to or less than the height of the wall portion 42b of the flow rate regulating valve 100 in the axis L direction. is set to .

<About the means for fixing the flow rate adjustment valve>
The fixing means for the flow rate adjustment valve 100 needs to detachably fix the flow rate adjustment valve 100 to the cooler 200c for maintenance. First, when viewed from the direction of the axis L, the driving element 40 including the enclosing tube 48 is aligned with the recess 210 and the relief groove 220, and the drive element 40 including the enclosing tube 48 is placed in the recess 210 and the relief groove 220. insert it inside. As a result, the flat plate portion 42a of the drive element 40 comes into surface contact with the bottom surface 211 of the recess 210 in a state where the wall portion 42b and the enclosing tube 48 of the drive element 40 are surrounded by the side surface 212 and the relief groove 220. Then, the retaining ring 230 (for example, a C ring, etc.) is once compressed in the radial direction above the collar portion 44 of the drive element 40, and after being inserted into the annular groove 214, the compression of the retaining ring 230 is released. Here, the distance in the axis L direction between the bottom surface 211 and the lower end of the annular groove 214 is set to be the same as or slightly smaller than the distance in the axis L direction between the flat plate portion 42a and the upper end of the flange portion 44. As a result, the collar portion 44 is held between the retaining ring 230 and the recess 210, and as a result, the flow rate regulating valve 100 is cooled with the flat plate portion 42a of the drive element 40 in surface contact with the bottom surface 211 of the recess 210. It can be firmly fixed to the container 200c. In this embodiment, the depth of the recess 210 is set so that when the flow rate regulating valve 100 is fixed to the cooler 200c, the upper surface 201 of the cooler 200c and the secondary joint 10b do not interfere with each other. However, the present invention is not limited thereto, and for example, a groove may be formed in the upper surface 201 of the cooler 200c so that the upper surface 201 of the cooler 200c does not interfere with the secondary joint 10b.

As described above, in the third embodiment, in addition to the same effects as the second embodiment (improved degree of freedom in equipment layout, improved temperature-sensitive characteristics, and improved efficiency of installation work), the flow regulating valve 100 is attached to the cooler 200c. However, it can be firmly fixed. Furthermore, in the third embodiment, the flange 44 can be accommodated in the recess 210 instead of above the upper surface 201 of the cooler 200a as in the first embodiment (see FIG. 4(a)). It is possible to further reduce the mounting height of the flow rate regulating valve 100.

The embodiments of the present invention have been described above in detail with reference to the drawings, and other embodiments have also been described in detail, but the specific configuration is not limited to these embodiments, and the gist of the present invention Even if there is a change in the design within a range that does not deviate from the above, it is included in the present invention.

1 Cooling device 3 Filled gas 10 Valve housing 10a Primary joint 10b Secondary joint 11 First port 12 Second port 13 Valve chamber 14 Valve port 15 Bleed passage 16 Pressure equalization passage 17 Guide hole 20 Valve body 30 Adjustment spring unit (Valve closing force applying means)
40 Drive element 41 Upper lid 42 Lower lid 42a Flat plate part (temperature sensing part)
42b Wall part (temperature sensing part)
42a1 Inner wall 43 Diaphragm (sealing member)
44 Flange portion 45 Pressure equalization chamber 46 Sealed chamber 47 Wet pad 48 Encapsulated tube 49 Adsorbent inclusion body 100 Flow rate adjustment valves 200a, 200b, 200c Cooler (heat receiving section) (this embodiment)
200a' cooler (comparative example)
201 Upper surface 210 Recessed portion (this embodiment)
210' recess (comparative example)
211 Bottom surface (this embodiment)
211' Bottom (comparative example)
212 Side surface 213 Step portion 214 Annular groove 220 Relief groove 230 Retaining ring 300 Pump (fluid feeding means)
400 Heat radiator (heat radiation means)

A Cooling target Hr Height of the side surface rising from the bottom (this embodiment)
Hr' Height of the side surface rising from the bottom (comparative example)
Hd Height of the wall in the axial direction L Axis Wd Width of the wall Wr Width of the bottom Z Mounting height of the flow rate regulating valve (this embodiment)
Z' Mounting height of flow adjustment valve (comparative example)

Claims (5)

a fluid sending means for sending the refrigerant in a predetermined direction;
a heat receiving part that allows the refrigerant to pass through and receives heat from the object to be cooled;
a flow rate adjustment valve that adjusts the flow rate of the refrigerant passing therethrough according to the temperature of the object to be cooled;
a heat radiating means for radiating heat of the refrigerant;
Equipped with
A cooling device that connects the fluid sending means, the heat receiving section, the flow rate adjustment valve, and the heat radiating means and circulates the refrigerant,
The flow rate adjustment valve is
a valve housing having a first port through which the refrigerant is introduced, a valve port through which the refrigerant flowing from the first port passes, and a second port through which the refrigerant that has passed through the valve port is sent out;
a valve body that is movably provided in the valve housing and adjusts the valve opening degree of the valve port;
Valve closing force applying means for applying a force in a predetermined valve closing direction to the valve body;
a driving element that drives the valve body;
Equipped with
The driving element is capable of partitioning a temperature sensing portion forming an enclosed space into which the enclosed gas is enclosed, and a space into which the enclosed space and the refrigerant are introduced, and applying a valve opening force to the valve body. a sealing member;
The temperature sensing part has a bottomed cylindrical shape and includes a flat plate part and a wall part,
The heat receiving part includes a recessed part having a bottom surface and side surfaces,
A cooling device characterized in that, when the temperature sensing section is housed in the recess, the flat plate part of the temperature sensing section is brought into thermal contact with the bottom surface of the recess. The drive element further includes an upper lid and a lower lid that is the temperature sensing section,
A flange is formed by sandwiching the outer peripheral edge of the sealing member between the upper lid and the lower lid,
2. The cooling device according to claim 1, wherein the height of the side surface rising from the bottom surface of the recess is less than or equal to the height of the wall portion of the temperature sensing portion in the axial direction. 3. The cooling device according to claim 2, wherein the width of the bottom surface of the recess is approximately the same as the width of the wall of the temperature sensing section. An enclosure tube that is sealed and filled with the enclosure gas is connected to the wall portion of the temperature sensing section,
According to claim 2 or 3, the heat receiving section is provided with an escape groove for avoiding interference with the encapsulating tube when the temperature sensing section is housed in the recess. cooling system. The recess further includes, on the opening side of the side surface, a step portion whose diameter is larger than the inner diameter of the side surface, and an annular groove formed on the inner circumferential surface of the step portion,
A retaining ring is inserted into the annular groove after the temperature sensing portion is accommodated in the recess, and the collar portion of the driving element is fixed between the retaining ring and the recess. The cooling device according to any one of items 2 to 4.

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