High and low temperature pressure cycle test system

Abstract

The utility model provides a high and low temperature pressure cycle test system, which relates to the technical field of high and low temperature pressure cycle tests, and comprises an environmental box and a liquid storage box, the environmental box is provided with an accommodating cavity for accommodating a tested container, and the temperature in the accommodating cavity can be adjusted; the liquid storage tank is used for storing a medium; a liquid inlet pipeline and a liquid return pipeline are arranged between the liquid storage tank and the tested container; a high-pressure pump, a first high-pressure heat exchanger and a first one-way valve which are sequentially communicated are arranged on the liquid inlet pipeline in the liquid inlet direction, a liquid inlet of the high-pressure pump is communicated with the liquid storage tank, and a liquid outlet of the first one-way valve is communicated with the tested container; the first high-pressure heat exchanger is further connected with a first cooling and heating all-in-one machine, and the first cooling and heating all-in-one machine is used for heating or cooling media in the first high-pressure heat exchanger. According to the utility model, a pressure cycle test under medium temperature control and high and low temperature environments can be carried out on the tested container, and the performance of the tested container can be evaluated more comprehensively.

Description

Technical Field

[0001] This utility model relates to the field of high and low temperature pressure cycling test technology, and in particular to a high and low temperature pressure cycling test system. Background Technology

[0002] With the rapid advancement of science and technology and the development of new energy sources, the energy storage industry is expanding rapidly, leading to a surge in demand for energy storage testing equipment. Liquid high and low temperature pressure cycling test devices have become increasingly popular. These devices primarily conduct high and low temperature and pressure tests on liquids to evaluate the performance of the tested containers and ensure their ability to withstand various environmental conditions. While pressure cycling test devices operating at room temperature are widely used, most only meet the requirements for controlling the high and low temperatures of the test medium at room temperature. They do not simulate the high and low temperature environments of the tested containers, nor do they integrate the temperature control of the test medium with the ambient temperature control. Therefore, existing pressure cycling test devices cannot fully evaluate the performance of tested containers under high and low temperature conditions when injected with high and low temperature media. Utility Model Content

[0003] The purpose of this invention is to provide a high and low temperature pressure cycling test system to solve the problems existing in the prior art. It can perform medium temperature control and pressure cycling tests on the test container under high and low temperature environments, and conduct a more comprehensive evaluation of the performance of the test container.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] A high and low temperature pressure cycling test system includes an environmental chamber and a storage tank. The environmental chamber has a cavity for holding a test container, and the temperature inside the cavity is adjustable. The storage tank is used to store a medium. An inlet pipe and a return pipe are provided between the storage tank and the test container. A high-pressure pump, a first high-pressure heat exchanger, and a first one-way valve are sequentially connected along the inlet direction on the inlet pipe. The inlet of the high-pressure pump is connected to the storage tank, and the outlet of the first one-way valve is connected to the test container. The first high-pressure heat exchanger is also connected to a first integrated heating and cooling unit, which is used to heat or cool the medium in the first high-pressure heat exchanger.

[0006] As one embodiment, a pressure boosting valve is also provided on the liquid inlet pipeline, and the pressure boosting valve is located between the high-pressure pump and the first high-pressure heat exchanger.

[0007] As one embodiment, it also includes an overflow valve, the inlet of which is connected to the outlet of the high-pressure pump, and the outlet of which is connected to the storage tank.

[0008] In one embodiment, a second one-way valve and a second high-pressure heat exchanger are sequentially connected along the return liquid direction on the return liquid pipeline. The inlet of the second one-way valve is connected to the test container, and the outlet of the second high-pressure heat exchanger is connected to the storage tank. The second high-pressure heat exchanger is connected to a second integrated heating and cooling machine, which is used to heat or cool the medium in the second high-pressure heat exchanger.

[0009] As one embodiment, a pressure reducing valve is also provided on the return pipeline. The inlet of the pressure reducing valve is connected to the outlet of the second high-pressure heat exchanger, and the outlet of the pressure reducing valve is connected to the storage tank through a high-pressure filter.

[0010] As one embodiment, the system also includes a chiller connected to the liquid storage tank, the chiller being used to regulate the temperature of the medium in the liquid storage tank.

[0011] As one embodiment, it also includes a pressure sensor for measuring the pressure in the test container.

[0012] In one embodiment, the inlet pipe is equipped with a first temperature sensor and a second temperature sensor for measuring the temperature of the medium. The first temperature sensor is located near the inlet of the first high-pressure heat exchanger, and the second temperature sensor is located near the inlet of the first one-way valve. The return pipe is equipped with a third temperature sensor and a fourth temperature sensor. The third temperature sensor is located near the outlet of the second one-way valve, and the fourth temperature sensor is located near the outlet of the second high-pressure heat exchanger.

[0013] As one embodiment, it also includes a fifth temperature sensor for measuring the temperature of the medium at the port of the test container and a sixth temperature sensor for measuring the temperature of the medium inside the test container. There are one or more sixth temperature sensors. When multiple sixth temperature sensors are provided, the multiple sixth temperature sensors respectively measure the medium temperature at different positions along the axial direction of the test container.

[0014] As one embodiment, it also includes a seventh temperature sensor for measuring the internal temperature of the environmental chamber and an eighth temperature sensor for measuring the temperature of the medium in the liquid storage tank.

[0015] This utility model has the following technical advantages over the prior art:

[0016] This invention uses an environmental chamber to hold the test container, which allows for adjustment of the ambient temperature. Furthermore, by incorporating a first high-pressure heat exchanger and a first integrated heating and cooling unit, the combined operation of these two components regulates the temperature of the injected medium. This enables the testing of the test container under temperature control and pressure cycling tests in high and low temperature environments, allowing for a more comprehensive evaluation of the container's performance. Moreover, the high and low temperature pressure cycling test system in this invention has a simple structure and is easy to operate, which helps improve the efficiency of high and low temperature pressure cycling tests. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a high and low temperature pressure cycle test system in one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Liquid storage tank; 2. High-pressure pump; 3. Overflow valve; 4. Pressure boosting valve; 5. Pressure reducing valve; 61. First high-pressure heat exchanger; 62. Second high-pressure heat exchanger; 7. First integrated heating and cooling unit; 8. Second integrated heating and cooling unit; 9. Environmental chamber; 10. Environmental chamber control system; 11. Test container; 12. High-pressure filter; 13. Chiller control system; 14. Chiller; 15. Control device; 16. Pressure sensor; 171. First check valve; 172. Second check valve; 181. First temperature sensor; 182. Second temperature sensor; 183. Third temperature sensor; 184. Fourth temperature sensor; 185. Fifth temperature sensor; 186. Sixth temperature sensor; 187. Seventh temperature sensor; 188. Eighth temperature sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a high and low temperature pressure cycling test system to solve the problems existing in the prior art. It can perform medium temperature control and pressure cycling tests on the test container under high and low temperature environments, and conduct a more comprehensive evaluation of the performance of the test container.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1:

[0025] like Figure 1 As shown, this embodiment provides a high and low temperature pressure cycling test system, including an environmental chamber 9 and a storage tank 1. The environmental chamber 9 has a cavity for holding the test container 11. The environmental chamber 9 is connected to an environmental chamber control system 10, which allows the temperature inside the cavity to be adjusted. The storage tank 1 is used to store a medium, which is typically a water-based liquid medium. An inlet pipe and a return pipe are provided between the storage tank 1 and the test container 11. A high-pressure pump 2, a first high-pressure heat exchanger 61, and a first one-way valve 171 are sequentially connected along the inlet direction on the inlet pipe. The inlet of the high-pressure pump 2 is connected to the storage tank 1 and is used to pump the medium into the test container 11. The outlet of the first one-way valve 171 is connected to the test container 11. The first high-pressure heat exchanger 61 is also connected to a first integrated heating and cooling unit 7, which is used to heat or cool the medium in the first high-pressure heat exchanger 61. The environmental chamber 9, the first integrated heating and cooling unit 7, and the first high-pressure heat exchanger 61 can be based on existing devices.

[0026] In use, the test container 11, the inlet pipe, and the return pipe are first filled with the medium, at which point the test container 11 is at atmospheric pressure. Then, the temperature inside the test container 11 and the environmental chamber 9 is brought to the set high or low temperature. The medium inside the first high-pressure heat exchanger 61 is then heated or cooled to the set high or low temperature using a combined heating and cooling machine. After the temperature stabilizes, a pressure test is performed on the test container 11. The inlet pipe is opened, the return pipe is closed, the high-pressure pump 2 is activated, and the medium passes through the first high-pressure heat exchanger 61 and the first one-way valve 1. 71 enters the test container 11, and the pressure in the test container 11 increases; after the pressure in the test container 11 reaches the set pressure limit, the inlet pipe is cut off, and the injection of medium into the test container 11 stops, and the test container 11 is in a pressure holding state; when the pressure holding time of the test container 11 reaches the set duration, the return pipe is opened, and the medium in the test container 11 flows back to the storage tank 1, completing one high temperature pressure cycle test; the temperature of the adjustable ambient chamber 9 and the medium temperature are repeated multiple times to complete the high and low temperature pressure cycle test.

[0027] Therefore, this embodiment uses an environmental chamber 9 to hold the test container 11, which can regulate the ambient temperature of the test container 11. This embodiment also uses a first high-pressure heat exchanger 61 and a first integrated heating and cooling unit 7. The first high-pressure heat exchanger 61 and the first integrated heating and cooling unit 7 work together to regulate the temperature of the injected medium, thereby enabling the test container 11 to undergo medium temperature control and pressure cycling tests under high and low temperature environments, and to conduct a more comprehensive evaluation of the performance of the test container 11. Moreover, the high and low temperature pressure cycling test system in this embodiment has a simple structure and is easy to operate, which is conducive to improving the test efficiency of high and low temperature pressure cycling tests.

[0028] The test container 11 in this embodiment can be a metal container or a non-metal container, and typically has an expansion of about 5%.

[0029] In this embodiment, a pressure boosting valve 4 is also provided on the liquid inlet pipeline. The pressure boosting valve 4 is located between the high-pressure pump 2 and the first high-pressure heat exchanger 61 and is used to increase the pressure of the medium injected into the test container 11.

[0030] This embodiment also includes an overflow valve 3. The inlet of the overflow valve 3 is connected to the outlet of the high-pressure pump 2, and the outlet of the overflow valve 3 is connected to the storage tank 1. When the pressure of the test container 11 reaches the set pressure limit, the pressure boosting valve 4 is closed and the overflow valve 3 is opened, so that the medium pumped by the high-pressure pump 2 does not enter the test container 11 through the pressure boosting valve 4 and the first high-pressure heat exchanger 61, but returns to the storage tank 1 through the overflow valve 3. Then the high-pressure pump 2 is turned off, thereby avoiding the situation where the pressure boosting valve 4 is directly closed without the overflow valve 3, which would cause pressure buildup and damage to the high-pressure pump 2.

[0031] In this embodiment, a second one-way valve 172 and a second high-pressure heat exchanger 62 are sequentially connected along the return direction on the return pipeline. The inlet of the second one-way valve 172 is connected to the test container 11, and the outlet of the second high-pressure heat exchanger 62 is connected to the storage tank 1. The second high-pressure heat exchanger 62 is connected to a second integrated heating and cooling unit 8, which is used to heat or cool the medium in the second high-pressure heat exchanger 62. When the test container 11 undergoes a high and low temperature cycle test, the medium in the test container 11 is in a high or low temperature state. After the high-temperature or low-temperature medium flows back to the storage tank 1 through the return pipeline, it affects the temperature of the medium in the storage tank 1, causing inconvenience for adjusting the medium temperature during subsequent tests. Moreover, the high-temperature or low-temperature medium can also easily have an adverse effect on other components on the return pipeline, such as valves. In this embodiment, by setting up the second high-pressure heat exchanger 62 and the second integrated heating and cooling unit 8, the medium in the second high-pressure heat exchanger 62 can be adjusted to room temperature before flowing back to the storage tank 1.

[0032] In this embodiment, a pressure reducing valve 5 is also provided on the return liquid pipeline. The inlet of the pressure reducing valve 5 is connected to the outlet of the second high-pressure heat exchanger 62. The outlet of the pressure reducing valve 5 is connected to the storage tank 1 through the high-pressure filter 12. The pressure reducing valve 5 reduces the pressure of the return medium. The high-pressure filter 12 is used to filter impurities in the return liquid to ensure that the medium in the storage tank 1 is clean.

[0033] This embodiment also includes a chiller 14 connected to the liquid storage tank 1. The chiller 14 is connected to a chiller control system 13. The chiller 14 is used to adjust the temperature of the medium in the liquid storage tank 1 so that the temperature of the medium in the liquid storage tank 1 is maintained at room temperature or other set temperature.

[0034] This embodiment also includes a pressure sensor 16 for measuring the pressure in the test container 11.

[0035] In this embodiment, a first temperature sensor 181 and a second temperature sensor 182 for measuring the temperature of the medium are installed on the inlet pipe. The first temperature sensor 181 is located near the inlet of the first high-pressure heat exchanger 61, and the second temperature sensor 182 is located near the inlet of the first one-way valve 171. The operating parameters of the first integrated cooling and heating unit 7 are adjusted by the feedback from the first temperature sensor 181 and the second temperature sensor 182, that is, the temperature of the medium in the first high-pressure heat exchanger 61 is adjusted so that the medium injected into the test container 11 reaches the set temperature. A third temperature sensor 183 and a fourth temperature sensor 184 are installed on the return pipe. The third temperature sensor 183 is located near the outlet of the second one-way valve 172, and the fourth temperature sensor 184 is located near the outlet of the second high-pressure heat exchanger 62. The operating parameters of the second integrated cooling and heating unit 8 are adjusted by the feedback from the third temperature sensor 183 and the fourth temperature sensor 184, that is, the temperature of the medium in the second high-pressure heat exchanger 62 is adjusted so that the medium returning to the storage tank 1 reaches the set temperature.

[0036] This embodiment also includes a fifth temperature sensor 185 for measuring the temperature of the medium at the port of the test container 11 and a sixth temperature sensor 186 for measuring the temperature of the medium inside the test container 11. There may be one or more sixth temperature sensors 186. When multiple sixth temperature sensors 186 are provided, the multiple sixth temperature sensors 186 respectively measure the temperature of the medium at different positions along the axial direction of the test container 11 in order to monitor the temperature distribution of the medium inside the test container 11.

[0037] This embodiment also includes a seventh temperature sensor 187 for measuring the internal temperature of the environmental chamber 9 and an eighth temperature sensor 188 for measuring the temperature of the medium in the liquid storage tank 1. The operating parameters of the environmental chamber control system 10 and the environmental chamber 9 are adjusted by the feedback of the seventh temperature sensor 187 so that the internal temperature of the environmental chamber 9 reaches the set value. The operating parameters of the chiller control system 13 and the chiller 14 are adjusted by the feedback of the eighth temperature sensor 188 so that the temperature of the medium in the liquid storage tank 1 is maintained at the set value.

[0038] In this embodiment, the pressure boosting valve 4, the pressure reducing valve 5, and the overflow valve 3 are all electrically controlled valves.

[0039] In this embodiment, a control device 15 is also provided. The control device 15 is connected to the first integrated heating and cooling unit 7, the second integrated heating and cooling unit 8, the high-pressure pump 2, the environmental chamber control system 10, the chiller 14 control system, the pressure boosting valve 4, the pressure reducing valve 5, the overflow valve 3, the pressure sensor 16, and the first temperature sensor 181 to the eighth temperature sensor 188. The other devices are regulated by the parameter feedback of the pressure sensor 16 and the first temperature sensor 181 to the eighth temperature sensor 188, so that the experiment can be carried out normally.

[0040] The structural design and system programming of the control device 15 are all achievable by those skilled in the art based on their own skills. This embodiment does not elaborate on the control principle of the control device 15.

[0041] Example 2:

[0042] This embodiment also provides a high and low temperature pressure cycling test method implemented using the high and low temperature pressure cycling test system in Embodiment 1, including the following steps:

[0043] Step 1, Initial State Setup: Before the first start-up, fill the test container 11 with the medium; start the high-pressure pump 2, and open the pressure boosting valve 4 and pressure reducing valve 5 to fill the inlet and outlet pipelines with the medium as well.

[0044] Step 2: Through the signals emitted by the sixth temperature sensor 186 and the seventh temperature sensor 187, the control device 15 sends instructions to the environmental chamber 9 and the environmental chamber control system 10 to adjust the temperature of the medium inside the test container 11 and the temperature of the internal cavity of the environmental chamber 9 to the set high temperature.

[0045] Step 3: Based on the signals emitted by the second temperature sensor 182 and the fifth temperature sensor 185, the control device 15 sends a command to the first integrated cooling and heating unit 7 to heat the medium inside the first high-pressure heat exchanger 61 to the set high temperature.

[0046] Step four: After the temperature stabilizes, a pressure test is performed on the test container 11. The control device 15 sends an opening command to the high-pressure pump 2 and the pressure boosting valve 4, and a closing command to the pressure reducing valve 5, so that the liquid inlet pipeline is open and the liquid return pipeline is closed, and the medium enters the test container 11, and the pressure of the test container 11 increases. At the same time, through the signals sent by the second temperature sensor 182, the fifth temperature sensor 185, the sixth temperature sensor 186, and the seventh temperature sensor 187, commands are sent to the first integrated cooling and heating unit 7, the environmental chamber 9, and the environmental chamber control system 10 to maintain the temperature of the medium in the first high-pressure heat exchanger 61 and the temperature in the environmental chamber 9 at the set high temperature.

[0047] Step 5: After the pressure of the test container 11 reaches the set pressure limit, the control device 15 sends a command to close the pressure boosting valve 4 and open the overflow valve 3 through the signal sent by the pressure sensor 16. The test container 11 is in a pressure holding state, and the outlet medium of the high pressure pump 2 returns to the storage tank 1 through the overflow valve 3.

[0048] Step 6: When the pressure holding time reaches the set duration, the control device 15 issues a command to open the pressure reducing valve 5. At the same time, through the signals from the third temperature sensor 183 and the fourth temperature sensor 184, a command is sent to the second integrated cooling and heating unit 8 to first cool the high-pressure medium passing through the second high-pressure heat exchanger 62 to room temperature and then return it to the liquid storage tank 1; thus, one high-temperature pressure cycle test is completed.

[0049] Step 7: Repeat steps 2 to 6 to complete the high temperature pressure cycle test; during the test, through the signal emitted by the eighth temperature sensor 188, the control device 15 sends instructions to the chiller control system 13 and the chiller 14 to control the temperature of the medium in the liquid storage tank 1 to be maintained at room temperature.

[0050] Step 8: After completing the high temperature and pressure cycle test, the control device 15 sends a command to the environmental chamber 9 and the environmental chamber control system 10 through the signals emitted by the sixth temperature sensor 186 and the seventh temperature sensor 187 to adjust the temperature of the medium in the test container 11 and the temperature inside the environmental chamber 9 to the set low temperature.

[0051] Step 9: Based on the signal from the temperature sensor, the control device 15 sends a command to the integrated cooling and heating unit to cool the medium in the high-pressure heat exchanger in the liquid inlet pipeline to the set low temperature.

[0052] Step 10: After the temperature stabilizes, a pressure test is performed on the test container 11. The control device 15 sends an opening command to the high-pressure pump 2 and the pressure boosting valve 4, and a closing command to the pressure reducing valve 5, so that the liquid inlet pipeline is connected and the return pipeline is closed, and the medium enters the test container 11, and the pressure of the test container 11 increases. At the same time, through the signals sent by the second temperature sensor 182, the fifth temperature sensor 185, the sixth temperature sensor 186, and the seventh temperature sensor 187, commands are sent to the first integrated cooling and heating unit 7, the environmental chamber 9, and the environmental chamber control system 10 to maintain the temperature of the medium in the first high-pressure heat exchanger 61 and the temperature in the environmental chamber 9 at the set low temperature.

[0053] Step 11: After the pressure of the test container 11 reaches the set pressure limit, the control device 15 sends a command to close the pressure boosting valve 4 and open the overflow valve 3 through the signal sent by the pressure sensor 16. The test container 11 is in a pressure holding state, and the outlet medium of the high pressure pump 2 returns to the storage tank 1 through the overflow valve 3.

[0054] Step 12: When the pressure holding time reaches the set duration, the control device 15 issues a command to open the pressure reducing valve 5. At the same time, through the signals from the third temperature sensor 183 and the fourth temperature sensor 184, a command is sent to the second integrated heating and cooling unit 8 to heat the high-pressure water passing through the second high-pressure heat exchanger 62 to room temperature before returning it to the storage tank 1. This completes one low-temperature pressure cycle test.

[0055] Step thirteen: Repeat steps eight to twelve to complete the low-temperature pressure cycle test; during the process, through the signal emitted by the eighth temperature sensor 188, the control device 15 sends instructions to the chiller control system 13 and the chiller 14 to control the temperature of the medium in the liquid storage tank 1 to be maintained at room temperature.

[0056] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0057] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high and low temperature pressure cycling test system, characterized in that, include: An environmental chamber having a cavity for holding the test container, the temperature of which is adjustable; A liquid storage tank is used to store a medium; an inlet pipe and a return pipe are provided between the liquid storage tank and the test container. The inlet pipeline is provided with a high-pressure pump, a first high-pressure heat exchanger and a first one-way valve connected in sequence along the inlet direction. The inlet of the high-pressure pump is connected to the storage tank and the outlet of the first one-way valve is connected to the test container. The first high-pressure heat exchanger is also connected to a first integrated heating and cooling unit, which is used to heat or cool the medium in the first high-pressure heat exchanger.

2. The high and low temperature pressure cycling test system according to claim 1, characterized in that, A pressure boosting valve is also installed on the liquid inlet pipeline, and the pressure boosting valve is located between the high-pressure pump and the first high-pressure heat exchanger.

3. The high and low temperature pressure cycling test system according to claim 1, characterized in that, It also includes an overflow valve, the inlet of which is connected to the outlet of the high-pressure pump, and the outlet of which is connected to the storage tank.

4. The high and low temperature pressure cycling test system according to claim 1, characterized in that, The return pipeline is provided with a second one-way valve and a second high-pressure heat exchanger connected in sequence along the return direction. The inlet of the second one-way valve is connected to the test container, and the outlet of the second high-pressure heat exchanger is connected to the storage tank. The second high-pressure heat exchanger is connected to a second integrated heating and cooling unit, which is used to heat or cool the medium in the second high-pressure heat exchanger.

5. The high and low temperature pressure cycling test system according to claim 4, characterized in that, A pressure-reducing valve is also installed on the return pipeline. The inlet of the pressure-reducing valve is connected to the outlet of the second high-pressure heat exchanger, and the outlet of the pressure-reducing valve is connected to the storage tank through a high-pressure filter.

6. The high and low temperature pressure cycling test system according to claim 1, characterized in that, It also includes a chiller connected to the liquid storage tank, the chiller being used to regulate the temperature of the medium in the liquid storage tank.

7. The high and low temperature pressure cycling test system according to claim 1, characterized in that, It also includes a pressure sensor for measuring the pressure in the test container.

8. The high and low temperature pressure cycling test system according to claim 4, characterized in that, The inlet pipe is equipped with a first temperature sensor and a second temperature sensor for measuring the temperature of the medium. The first temperature sensor is located near the inlet of the first high-pressure heat exchanger, and the second temperature sensor is located near the inlet of the first one-way valve. The return pipe is equipped with a third temperature sensor and a fourth temperature sensor. The third temperature sensor is located near the outlet of the second one-way valve, and the fourth temperature sensor is located near the outlet of the second high-pressure heat exchanger.

9. The high and low temperature pressure cycling test system according to claim 1, characterized in that, It also includes a fifth temperature sensor for measuring the temperature of the medium at the port of the test container and a sixth temperature sensor for measuring the temperature of the medium inside the test container. There are one or more sixth temperature sensors. When multiple sixth temperature sensors are provided, the multiple sixth temperature sensors respectively measure the temperature of the medium at different positions along the axial direction of the test container.

10. The high and low temperature pressure cycling test system according to claim 1, characterized in that, It also includes a seventh temperature sensor for measuring the internal temperature of the environmental chamber and an eighth temperature sensor for measuring the temperature of the medium in the liquid storage tank.

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