JP5378895B2 - Pressure vessel - Google Patents

Description

  The present invention relates to a pressure vessel.

  A pressure test is widely known as an example of a test for confirming the durability and reliability of a product. For such a pressure test, a so-called pressure vessel is used. As a pressure vessel used for such a pressurization test, there exist some which are indicated by patent documents 1, 2, for example.

Japanese Patent Laid-Open No. 7-213590 JP 2001-355730 A

Each of the pressure vessels disclosed in Patent Documents 1 and 2 makes the internal space a high temperature / high pressure environment. In this way, when the internal space is brought to a high temperature, it is sufficient that the pressure vessel is provided with heating means.
In contrast, a cooling device is required to lower the temperature of the pressure vessel. However, if a cooling device is separately attached to a conventional pressure vessel, the device configuration of the pressure vessel becomes complicated, and the pressure vessel However, there is a problem that the cost becomes high.

  Accordingly, the present invention provides a pressure vessel that can provide the inside of the pressure vessel in both high and low temperatures, has a simple device configuration, and can be manufactured at low cost. It is said.

In order to achieve the above object, the present invention has the following configuration.
That is, an inner cylinder formed so that an article can be placed in an internal space, and a temperature at which the inner cylinder is accommodated and the temperature and pressure of the inner space including the inner space of the inner cylinder can be set to an arbitrary temperature and pressure. A temperature adjusting means of the temperature adjusting unit, wherein a Peltier element is used, and a heat sink is thermally connected to the Peltier element. The heat sink is a pressure vessel that is attached in a gap between the can body and the inner cylinder at a predetermined interval in the depth direction of the can body .

  According to the pressure vessel of the present invention, it is possible to easily provide the internal space of the pressure vessel regardless of whether the temperature is high or low, while having a simple structure. Moreover, since the structure of a pressure vessel is simple, a pressure vessel can be provided at low cost.

It is a partial see-through | perspective side view of the pressure vessel in this embodiment. It is a partially transparent front view of the pressure vessel in this embodiment. It is a partially transparent rear view of the pressure vessel in this embodiment. It is an enlarged view of the temperature adjustment part in this embodiment. It is sectional drawing in the AA line in FIG. 4 which shows the channel | path for refrigerant | coolants.

Hereinafter, embodiments of a pressure vessel according to the present invention will be described with reference to the drawings. FIG. 1 is a partially transparent side view of a pressure vessel in the present embodiment. FIG. 2 is a partially transparent front view of the pressure vessel in the present embodiment. FIG. 3 is a partially transparent rear view of the pressure vessel in the present embodiment. FIG. 4 is an enlarged view of the temperature adjustment unit in the present embodiment. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4 showing the refrigerant passage.
The pressure vessel 10 according to the present embodiment includes an inner cylinder 20 for providing a test environment, and a can body 30 that houses the inner cylinder 20, on which the test object TP can be placed in the internal space 22. Have. As shown in FIGS. 1 and 2, the pressure vessel 10 in this embodiment is accommodated in a housing 90 mounted on a main body frame 100 having legs 110.

  The housing 90 is formed in a box-like body that houses the can 30 to which the inner cylinder 20 and the temperature adjusting unit 40 are attached. A closing door 91 of the housing 90 formed integrally with the closing door 31 that closes the opening of the can 30 is attached to the front surface side of the housing 90. In addition, an intake port 92 and an exhaust port 94 are formed in the housing 90, and an exhaust fan 96 is disposed in the exhaust port 94. Communication codes for the temperature adjustment unit 40 and the pressure sensor are electrically connected to the pressure control unit 60. Further, the communication code of the temperature sensor and the refrigerant supply unit 70 is connected to the temperature control unit 50. The housing 90 is attached to the main body frame 100 having the leg portions 110. In addition to the housing 90, the main body frame 100 is equipped with a temperature control unit 50, a pressure control unit 60, and a refrigerant supply unit 70. Since a caster with a stopper is disposed at the bottom of the main body frame 100, the pressure vessel 10 can be easily moved and fixed.

  The can body 30 includes a temperature adjustment unit 40 that adjusts the temperature of the air (atmosphere) in the inner space of the can body 30 including the internal space of the inner cylinder 20 through a gap 32 between the inner cylinder 20 and the can body 30, and the can body A pressurizing pump 62 and a depressurizing pump 64, which are pressure adjusting sections for adjusting the pressure of air (atmosphere) in the inner space 30, are disposed. The operations of the temperature adjustment unit 40, the pressure pump 62, and the pressure reduction pump 64 are controlled by the temperature control unit 50 and the pressure control unit 60, respectively. The temperature control unit 50 includes a storage unit that stores a control program, and a CPU that issues an operation control signal to the temperature adjustment unit 40 and the refrigerant supply unit 70 based on the control program. The pressure control unit 60 includes a storage unit that stores a control program, and a CPU that issues control signals to the pressurization pump 62 and the decompression pump 64 based on the control program. These temperature control unit 50 and pressure control unit 60 can also be configured by a personal computer or the like in which a control program is stored in advance.

The inner cylinder 20 is formed in a cylindrical shape having an opening at one end and a wall 24 at the other end. The inner cylinder 20 formed in this way is accommodated in a gap 32 formed between the inner cylinder 20 and the can 30 in a lateral arrangement so that the wall portion 24 is on the back side.
The inner cylinder 20 is provided with a placement portion 26 for placing the test object TP in the inner space 22 of the inner cylinder 20. The wall portion 24 is provided with a communication portion 28 that allows the internal space 22 and the gap 32 to communicate with each other. The opening of the inner cylinder 20 is always open, and the inner space 22 and the gap 32 of the inner cylinder 20 are always in communication with each other by the opening and the communication portion 28. Further, on the outer surface of the inner cylinder 20, an air guide plate 29 for guiding the atmosphere discharged from the inner space 22 by the circulation fan 36 from the communication portion 28 of the inner cylinder 20 to a predetermined position on the outer surface of the inner cylinder 20. Is attached.

  Similar to the inner cylinder 20, the can body 30 is formed in a cylindrical shape having an opening on one side and a wall 34 on the other end. On the opening side of the can 30, a closing door 31 for closing the opening in an airtight manner is provided. When the closing door 31 is closed, only the opening of the can 30 is closed airtight. The closing door 31 in this embodiment is formed integrally with the closing door 91 of the housing 90. Similarly to the inner cylinder 20, the can body 30 is also arranged in a lateral orientation so that the wall 34 is on the back side. A circulation fan 36 for circulating the atmosphere of the gap 32 formed between the inner cylinder 20 and the can 30 is disposed on the wall 34. A support base 33 for supporting the inner cylinder 20 is disposed along the inner peripheral surface at a lower portion of the inner peripheral surface of the can body 30. The support base 33 is formed in such a dimension that the height position of the communication portion 28 of the inner cylinder 20 accommodated in the gap 32 is the same height position as the height position of the circulation fan 36.

The can body 30 is provided with a temperature adjusting unit 40 for adjusting the atmospheric temperature of the gap 32. The can body 30 is provided with a communication hole 35 that communicates the gap 32 between the inner cylinder 20 and the can body 30 and the outer space, and a guide body for mounting the temperature adjusting unit 40 in the communication hole 35. 37 is attached in a state where the airtightness of the connecting portion is maintained. A method of attaching the temperature adjustment unit 40 to the guide body 37 will be described later. A service hole 38 is disposed on the side surface of the can 30. The service hole 38 is provided with a power line and a communication line (both not shown) for supplying power to and communicating with the test object TP placed on the placement part 26 of the inner cylinder 20. It is for laying in the part 26. These power supply lines and communication lines are accommodated in a cap body 39 that is formed so as to be airtightly fitted in accordance with the shape of the opening of the service hole 38.
Although not shown here, it is needless to say that the service hole and the cap body may be arranged in the same manner as the can 30 in the portion of the inner cylinder 20 that overlaps with the service hole 38.

As shown in FIG. 4, the temperature adjustment unit 40 in this embodiment includes a heat sink 42 for heat exchange of the atmosphere circulated in the gap 32 including the internal space 22 of the inner cylinder 20, and a heat sink 42 and a heat sink 42. It has a Peltier element 44 that is connected and is a temperature adjusting means for adjusting the temperature of the heat sink 42. The heat sink 42 and the Peltier element 44 are connected by a threaded portion 41 </ b> A of the heat conducting plate 41. The screw portion 41A is integrally formed with the heat conduction plate 41 between the lower surface (here, the cooling surface) of the heat sink 42. The heat conduction plate 41 is formed in a size that can cover the opening of the guide body 37. Such a screw part 41A and the heat conductive plate 41 were formed by machining from a copper pillar. Thus, it is convenient in terms of heat conduction efficiency by integrally forming the screw portion 41A and the heat conduction plate 41 .

  First, the screw part 41A of the temperature adjusting part 40 is inserted into the guide body 37 from the outer side of the can body 30, and the screw part 41A is tightened with the fastening nut NT by tightening the portion protruding from the inside of the can body 30. Attach to 30 (guide body 37). The upper and lower ends of the guide body 37 are sandwiched between the tightening nut NT of the temperature adjustment unit 40 and the heat conduction plate 41, and a seal member 39 is disposed between the guide body 37 and the heat conduction plate 41. The guide body 37 and the heat conducting plate 41 are connected in an airtightly sealed state. The heat sink 42 is attached by screwing to the tip of the screw portion 41A.

  After the screw portion 41 </ b> A and the heat conduction plate 41 are attached to the guide body 37, the Peltier element 44 is disposed on the upper surface of the heat conduction plate 41. A screw hole 41 </ b> B is disposed in the heat conduction plate 41 so as to surround the Peltier element 44 on the outer side of the outer peripheral edge of the Peltier element 44. After placing the Peltier element 44 on the upper surface of the heat conducting plate 41, the heat exchanger 47 is placed on the upper surface (here, the heat dissipation surface) of the Peltier element 44. The spacer 45 made of a heat insulating material is formed in a cylindrical body that is open at both ends, and is erected at the position of the screw hole 41 </ b> B of the heat conducting plate 41. As shown in FIG. 4, the heat exchanger 47 is formed of a copper plate having a convex shape whose front view is downward. The tip surface of the lower convex portion of the heat exchanger 47 is formed in a planar shape that is slightly larger than the planar shape of the upper surface of the Peltier element 44. The heat exchanger 47 is also formed with a through hole 47A at the same plane position as the screw hole 41B of the heat conduction plate 41, and a thermal insulator 46 is inserted to prevent heat conduction between the through hole 47A and the fastening screw 49B. Has been.

  A washer 49A made of a heat insulating material is arranged in the through hole 47A of the heat exchanger 47, a fastening screw 49B is inserted, the fastening screw 49B is inserted into the heat exchanger 47 and the spacer 45, and the tip portion of the heat conduction plate 41 is inserted. Screwed into the screw hole 41B. Since a spring 49C, which is a biasing member, is disposed between the washer 49A and the head of the tightening screw 48B, the heat exchanger 47 has an appropriate force applied to the Peltier element 44 by the biasing force of the spring 49C. It is pressed by. The Peltier element 44 and the spacer 45 are sandwiched between the heat conduction plate 41 and the heat exchanger 47, but the spacer 45 causes the Peltier element 44 to be excessively tightened by the heat conduction plate 41 and the heat exchanger 47 ( The separation distance between the heat conducting plate 41 and the heat exchanger 47 is regulated.

The temperature adjusting unit 40 is attached to the can 30 as described above.
As shown in FIG. 1, the temperature adjustment unit 40 attached to the can body 30 in this way is arranged in an inverted shape in the depth direction of the can body 30 when facing the can body 30 from the side surface. ing. Further, in the height direction, as shown in FIG. 3, when the can body 30 is faced from the back surface, the outer surface excluding the position of the weld line located above the can body 30 (the side surface of the can body 30 in FIG. 3). Are attached in an array with a required interval along the portion.

  As shown in FIG. 5, a pipeline 78 communicating with a refrigerant supply unit 70 for supplying a refrigerant for cooling the heat exchanger 47 is connected to the heat exchanger 47 mounted on the heat radiation surface side of the Peltier element 44. Has been. The refrigerant supplied from the refrigerant supply unit 70 passes through the refrigerant passage 48 formed by drilling a hole in the thickness of the heat exchanger 47, thereby exchanging heat in the heat exchanger 47 (here. Let's cool down. The refrigerant passage 48 forms first drill holes 48A and 48A parallel to two opposite sides of the outer peripheral edge of the heat exchanger 47, and the first drill hole 48A is formed from a direction perpendicular to the first drill holes 48A and 48A. , 48A are communicated with each other, and a second drill hole 48B is formed to form a substantially U-shaped refrigerant passage 48 in plan view. The opening of the second drill hole 48B is closed by a water stop plug 48C. Here, a water stop paste is filled as the water stop plug 48C. Connection plugs 48 </ b> D are respectively attached to the inlet side and outlet side openings of the refrigerant passage 48.

The refrigerant that has passed through the refrigerant passage 48 passes through the refrigerant heat exchanging portion 72 having cooling fins disposed on the back side of the housing 90 as shown in FIG. Housed in a tank 74. The refrigerant heat exchanging unit 72 is disposed at an intermediate position between the exhaust fan 96 and the exhaust port 94, and cools the refrigerant with the air in the housing 90 discharged from the exhaust port 94 by the exhaust fan 96. The refrigerant stored in the catch tank 74 passes through the circulation pump 76, the pipeline 78 , the refrigerant passage 48, and the refrigerant heat exchange unit 72, and then returns to the catch tank 74 and is circulated and used in the refrigerant supply unit 70. ing. As the refrigerant in the present embodiment, ethylene glycol prepared to a predetermined concentration is used, but other refrigerants can also be used. The catch tank 74 is provided with a confirmation window 74A for confirming the amount of refrigerant accommodated.

  By adopting such a configuration of the temperature adjustment unit 40, heat exchange of the heat exchanger 47 attached to the heat dissipation surface of the Peltier element 44 is promoted. Thereby, the cooling of the cooling surface of the Peltier element 44 is promoted, and the cooling of the heat conductive plate 41 is also promoted. From the above, the cooling of the heat sink 42 is also promoted, the atmosphere circulating in the gap 32 including the inner space 22 of the inner cylinder 20 is quickly cooled, and the inner space of the can 30 including the inner space of the inner cylinder 20 is cooled. Energy required for temperature adjustment (cooling) can be reduced.

In addition, a pressure pump 62 and a pressure reduction pump 64 are connected to the can body 30. Since each of the pressurization pump 52 and the decompression pump 54 is provided as described above, the internal space 22 of the inner cylinder 20 is referred to as a high pressure environment and a pressure environment below atmospheric pressure (hereinafter, a pressure environment below atmospheric pressure is referred to as a decompression environment). ) Any pressure environment can be set. The pressurizing pump 62 and the depressurizing pump 64 are disposed on the main body frame 100.
Either the inner cylinder 20 or the can body 30 is provided with a temperature sensor and a pressure sensor (both not shown) for detecting the temperature and pressure value of the atmosphere in the gap 32 including the inner space 22 of the inner cylinder 20. ing. The detection values of these temperature sensors and pressure sensors are transmitted to the temperature control unit 50 and the storage unit of the pressure control unit 60 as needed. The temperature information and pressure information detected and transmitted by the sensors are displayed on the respective display units. The user can grasp the state of the internal space of the pressure vessel 10 at any time by checking each display unit.

  Next, an example of how to use the pressure vessel 10 in the present embodiment will be described. Here, a usage method for setting the gap 32 including the internal space 22 in a low-temperature decompression environment will be described. Such a low-temperature decompression environment can be applied to a part of the performance test of the electronic device.

First, an electronic device as the test object TP is accommodated in the mounting portion 26 provided in the inner cylinder 20, the closing door 91 of the housing 90 is closed, and the openings of the housing 90 and the can 30 are respectively opened. Block. Next, the user operates the input means provided in the temperature control unit 50 and the pressure control unit 60, and inputs the temperature conditions and pressure conditions required in the performance test to the temperature control unit 50 and the pressure control unit 60. Turn on the start switch. Then, the temperature control unit 50 controls the operations of the circulation fan 36, the temperature adjustment unit 40, and the refrigerant supply unit 70, and the pressure control unit 60 controls the operation of the decompression pump 64.
Specifically, detected values of the temperature sensor and the pressure sensor disposed in the inner cylinder 20 are transmitted to the temperature control unit 50 and the pressure control unit 60 as needed. When each control unit receives a detection value from each sensor, each control unit compares the detection value with a set condition, and circulation fan 36, temperature adjustment unit 40, pressurization so that the detection value approaches the set value. Operation control of the pump 62, the pressure reduction pump 64, and the refrigerant | coolant supply part 70 is performed. Since the detection value by each sensor is displayed on the display part provided in each control part, the user can also grasp | ascertain the present environment in the pressure vessel 10. FIG.

When the circulation fan 36 blows the atmosphere in the inner space 22 of the inner cylinder 20 from the communication portion 28 toward the opening side of the inner space 22, the atmosphere in the pressure vessel 10 is changed from the opening of the inner cylinder 20 to the inner cylinder 20. And the can 30 are supplied to the gap 32. Since the air guide plate 29 is disposed on the outer surface of the inner cylinder 20, the atmosphere supplied to the gap 32 between the inner cylinder 20 and the can body 30 is supplied in the direction induced by the air guide plate 29. Will be. Since the air guide plate 29 induces the atmosphere in the pressure vessel 10 to the position of the heat sink 42 disposed in the gap 32, the contact between the heat sink 42 and the atmosphere in the pressure vessel 10 is promoted.
Since the heat sink 42 is connected to the screw portion 41A thermally connected to the Peltier element 44, the heat absorbed by the heat sink 42 is thermally conducted to the heat conduction plate 41 via the screw portion 41A. Since the cooling surface of the Peltier element 44 is in contact with the heat conductive plate 41, the heat conductive plate 41 is cooled by the Peltier element 44. In the present embodiment, the gap 32 including the inner space 22 of the inner cylinder 20 is supplied to the Peltier element 44 so that the surface of the Peltier element 44 on the side of the heat conduction plate 41 becomes a cooling surface in order to create a low-temperature decompression environment. The direction of the current is controlled by the temperature control unit 50.

A heat exchanger 47 is disposed on the heat radiation surface of the Peltier element 44, and refrigerant (ethylene glycol) is supplied from a pipeline 78 connected to the refrigerant supply unit 70 to the refrigerant passage 48 formed in the heat exchanger 47. Supplied to promote heat dissipation by the heat exchanger 47. The refrigerant supplied to the refrigerant supply passage 48 is supplied from the catch tank 74 to the heat exchanger 47 in each temperature adjustment unit 40 by the circulation pump 76. In the present embodiment, the refrigerant is supplied to the heat exchangers 47, 47, 47,... Of the temperature adjusting units 40, 40, 40,. Depending on the refrigerant discharge capability of the pump 76, parallel connection may be possible. The refrigerant that has passed through all the heat exchangers 47, 47, 47,... Attached to the can 30 is cooled by the refrigerant heat exchanging unit 72 disposed in the vicinity of the discharge port 94. It is stored in the catch tank 74 later. As described above, the refrigerant supplied to the heat exchanger 47 uses a refrigerant having a volume equal to or larger than the volume of the pipeline 78 of the refrigerant supply unit 70, and is circulated in the refrigerant supply unit 70 while being cooled. The cooling effect can be made extremely high.

  The atmosphere in the gap 32 including the inner space 22 of the inner cylinder 20 that has passed through the heat sink 42 in this way and is exchanged is supplied again from the communication portion 28 to the inner space 22 by the circulation fan 36. As described above, heat exchange is performed in a closed space (an inner space of the can 30, that is, an inner space of the pressure vessel 10) including the gap 32 including the inner space 22 of the inner cylinder 20 in which the test object TP is disposed. However, since the atmosphere is circulated, the temperature can be adjusted in a short time.

  Simultaneously or before and after the temperature adjustment of the gap 32, the pressure adjustment of the gap 32 including the inner space 22 of the inner cylinder 20 is performed. When the pressure control unit 60 receives the detection value of the pressure sensor, the pressure reducing pump 64 that is a pressure adjusting unit is driven so that the atmospheric pressure of the set condition (here, the pressure reducing environment) is input to the pressure control unit 60. Then, the pressure in the inner space 22 and the gap 32 of the inner cylinder 20 is lowered, and the pressure reducing pump 64 is operated until the detected value of the pressure sensor reaches the set condition value input to the pressure control unit 60. After the pressure adjustment of the gap 32 including the inner space 22 of the inner cylinder 20 is completed by the pressure control unit 60, the pressure control unit 60 closes a valve (not shown) and changes the pressure state in the gap 32 (that is, in the pressure vessel 10). maintain.

As described above, even after the processing by the temperature control unit 50 and the pressure control unit 60 causes the state in the pressure vessel 10 to be in a preset condition, the temperature control unit 50 and the pressure control unit 60 are connected to the temperature sensor and the pressure sensor. Of course, the state in the pressure vessel 10 maintains the set temperature and the set pressure based on the detected value.
When the gap 32 including the internal space 22 is adjusted to the set temperature and the set pressure, the operation of the test object TP is confirmed. At this time, the operation state data of the test object TP can be collected through the service hole 38 described above. After the collection of the operation status data is completed, when the user transmits a test completion signal to the temperature control unit 50 and the pressure control unit 60 using the input means or the on / off switch, the pressure control unit 60 opens the valve, and the inner cylinder 20 An atmosphere release process for returning the pressure in the gap 32 including the internal space 22 to atmospheric pressure is performed. Thereafter, the test object TP can be taken out.

  Although the present invention has been described in detail above based on the embodiments, the technical scope of the present invention is not limited to the embodiments described above. For example, in the embodiment described above, the embodiment has been described in which the gap 32 (inside the pressure vessel 10) including the inner space 22 of the inner cylinder 20 is set to a low temperature and reduced pressure environment. It is possible to cope with any of a reduced pressure environment and a high temperature / high pressure environment. Regarding the temperature environment of the gap 32 (inside the pressure vessel 10), the temperature control unit 50 may control the power supply to the Peltier element 44 so that the cooling surface and the heat dissipation surface of the Peltier element 44 are switched. In addition, a heating unit may be provided in the refrigerant heat exchange unit 72 of the refrigerant supply unit 70 to heat the refrigerant. And about the pressure environment of the clearance gap 32 (the inside of the pressure vessel 10), what is necessary is just to operate an appropriate pump among the pressurization pump 62 or the pressure reduction pump 64 suitably.

  Moreover, in this embodiment, although the form which provided the temperature control part 50 and the pressure control part 60 separately as a control part which each adjusts the temperature and pressure in the pressure vessel 10 is demonstrated, temperature control It is of course possible to employ a control unit in which the unit 50 and the pressure control unit 60 are integrated.

Further, in the embodiment described above, the heat sink 42 is disposed in the gap 32 between the inner cylinder 20 and the can body 30, and the Peltier element 44 thermally connected to the heat sink 42 is disposed outside the can body 30 (atmosphere). It is held by the guide body 37 in the middle), but is not limited to this form .

DESCRIPTION OF SYMBOLS 10 Pressure vessel 20 Inner cylinder 22 Internal space 29 Air guide plate 30 Can body 32 Crevice 36 Circulating fan 40 Temperature adjustment part 42 Heat sink 44 Peltier element 47 Heat exchanger 48 Refrigerant passage 50 Temperature control part 60 Pressure control part 64 Pressure reduction pump 70 Refrigerant supply part 72 Refrigerant heat exchange part 74 Catch tank 90 Case

Claims (7)

An inner cylinder formed so that an article can be placed in the inner space;
A can body having a temperature adjusting unit and a pressure adjusting unit capable of setting the temperature and pressure of an inner space including the inner space of the inner cylinder to an arbitrary temperature and pressure;
A Peltier element is used as the temperature adjusting means of the temperature adjusting unit ,
A heat sink is thermally connected to the Peltier element,
The pressure vessel , wherein the heat sink is attached in a gap between the can body and the inner cylinder at a predetermined interval in the depth direction of the can body . The inner cylinder is formed with a communication portion that communicates with the inside of the inner cylinder and the gap between the can body and the inner cylinder,
The can body is provided with a circulation fan for circulating the atmosphere of the inner space of the inner cylinder from the communication portion to the gap between the can body and the inner cylinder,
The outer surface of the inner cylinder, the pressure of claim 1, wherein the air guide plate for guiding the atmosphere discharged from the inner space of the inner cylinder in the mounting position of the heat sink is mounted container. The pressure vessel according to claim 1 or 2 , wherein the Peltier element is provided with a heat exchanger on the heat radiating surface and a heat conduction plate on the cooling surface. The distance between the heat exchanger mounted on the heat radiating surface side of the Peltier element and the heat conducting plate mounted on the cooling surface side of the Peltier element is regulated by a spacer. 3. The pressure vessel according to 3 . The pressure vessel according to claim 3 or 4, wherein the heat exchanger mounted on the heat radiating surface side of the Peltier element is urged toward the heat radiating surface side of the Peltier element by an urging means. The refrigerant passage for passing the refrigerant | coolant which cools the said heat exchanger is provided in the said heat exchanger with which the heat radiating surface of the said Peltier element was passed among the Claims 3-5 characterized by the above-mentioned. The pressure vessel according to any one of the above. The pressure vessel according to claim 6, wherein a refrigerant heat exchange section is disposed in the refrigerant passage.

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