Low-pressure rapid temperature change function device

Abstract

The invention relates to a rapid temperature change technology in a low-pressure environment, in particular to a low-pressure rapid temperature change function device. The device comprises a pressure-bearing box body and a heat preservation jacket, the pressure-bearing box body and the heat preservation jacket are independent individuals, the heat preservation jacket is arranged outside the pressure-bearing box body in a covering mode, and the device is provided with a liquid nitrogen device, a liquid nitrogen adjusting valve, a one-way valve, a heat preservation jacket inner circulation fan and a pressure-bearing box body inner stirring fan. In addition, the pressure-bearing box body is provided with a vacuum valve and a vacuum pump, and internal low-pressure rapid refrigeration and heating are achieved through rapid gas rapid refrigeration and heating outside the heat preservation jacket. According to the invention, the effect of rapidly realizing temperature change in a low-pressure environment is achieved, and the stability and reliability of the system are ensured at the same time.

Description

Technical Field

[0001] The present application relates to a rapid temperature change technology in a low-pressure environment, and in particular to a low-pressure rapid temperature change functional device. Background Art

[0002] Low-pressure rapid temperature change test technology is widely used in aviation, aerospace, electronics, materials and other fields. It aims to simulate extreme environmental conditions, such as rapid changes in high temperature, low temperature, low pressure, etc., to verify the performance and reliability of products or systems. This test is crucial for scientific research and technological innovation, and can provide valuable data support to help researchers and engineers optimize designs and improve product quality and safety. In the existing low-pressure rapid temperature change test technology, common means include the use of traditional refrigerants and heating elements to achieve changes in temperature and air pressure. Specifically, some test devices use compressor cooling and resistance wire heating to adjust the temperature and air pressure in the test chamber by controlling the flow rate of the refrigerant and the power of the heating element. Other devices use liquid nitrogen as a cooling medium, and achieve rapid temperature change through the combination of liquid nitrogen injection and heating elements. In addition, there are some devices that combine multiple means, such as using electrically controlled cooling devices and heaters to achieve stable temperature and air pressure changes through precise control. However, the existing low pressure cannot simultaneously achieve the low pressure rapid temperature change function. First, due to the low pressure, the combination of traditional refrigerants and heating elements can achieve rapid temperature change in normal pressure air, but it performs poorly in achieving rapid temperature change in low pressure and cannot meet the needs of some equipment testing. However, liquid nitrogen injection can achieve rapid cooling and rapid temperature change through radiation. Summary of the invention

[0003] The purpose of this application is to overcome the above technical problems and provide a low pressure rapid temperature change functional device A low-pressure rapid temperature change functional device comprises a pressure box and an insulation jacket, wherein the pressure box and the insulation jacket are independent entities, the insulation jacket cover is arranged on the outside of the pressure box, a liquid nitrogen device, a liquid nitrogen regulating valve, and a one-way valve are arranged on the outside of the insulation jacket, an insulation jacket internal circulation fan is also arranged inside the insulation jacket, a pressure box internal stirring fan is arranged inside the pressure box, a vacuum valve is connected to the outside of the insulation jacket of the pressure box, and the vacuum valve is connected to a vacuum pump, and the pressure box radiates heat and cold through rapid gas cooling and heating outside the insulation jacket, thereby realizing internal low-pressure rapid cooling and heating. By adopting the above technical solution, the rapid temperature change function in a low-pressure environment is realized. The liquid nitrogen generated by the liquid nitrogen device enters the insulation jacket through the liquid nitrogen regulating valve and the one-way valve, and the liquid nitrogen is rapidly cooled by the circulation fan inside the insulation jacket after being gasified. At the same time, the stirring fan in the pressure box inside the pressure box is running, the vacuum valve is opened, and the vacuum pump evacuates the pressure box, so that the pressure box is radiated by the fast gas rapid cooling and heating outside the insulation jacket, thereby realizing the rapid cooling and heating of the internal low pressure. This design not only improves the temperature change speed, but also enhances the controllability and stability of the test environment, providing an efficient and reliable solution for scientific research and product testing. Preferably, the insulation jacket also includes a jacket heater and an electric control cooling device, the electric control cooling device is installed on one side of the insulation jacket, the jacket heater is installed inside the insulation jacket, the electric control cooling device is connected to the jacket heater through a wire, the electric control cooling device is located at the bottom of the insulation jacket, and the jacket heater is located inside the insulation jacket, jointly realizing the conventional high and low temperature and low pressure function. By adopting the above technical solution, the combined use of the jacket heater and the electric control cooling device enables the insulation jacket to be accurately controlled under different temperature conditions, not only realizing the conventional high and low temperature and low pressure function, but also ensuring the stability during the temperature change process. The positions of the electrically controlled cooling device and the jacket heater are reasonably designed. The electrically controlled cooling device is located at the bottom of the insulation jacket, and the jacket heater is located inside the insulation jacket, which can effectively improve the heating and cooling efficiency, reduce energy loss, and ensure the uniform distribution of temperature during the test. At the same time, the circuit structure is simplified by the way of wire connection, and the reliability and maintenance convenience of the system are improved. In summary, the technical solution significantly improves the adaptability and reliability of the low-pressure rapid temperature change functional device. Preferably, the liquid nitrogen device is connected to the liquid nitrogen regulating valve and the one-way valve in sequence through the first pipeline, and the one-way valve is connected to the inside of the insulation jacket through the second pipeline. The first pipeline and the second pipeline are both provided with a fixed bracket, and the fixed bracket is fixed on the outer wall of the insulation jacket to ensure that the pipeline connection is stable and reliable, and the liquid nitrogen regulating valve is installed on the top outside of the insulation jacket.By adopting the above technical solution, the liquid nitrogen device is connected to the liquid nitrogen regulating valve and the one-way valve in sequence through the first pipeline, and the one-way valve is then connected to the inside of the insulation jacket through the second pipeline, so that the liquid nitrogen can smoothly and safely enter the insulation jacket to achieve rapid cooling. The first pipeline and the second pipeline are both provided with a fixed bracket, and the fixed bracket is fixed on the outer wall of the insulation jacket to ensure the stability and reliability of the pipeline connection, prevent leakage or falling off under high pressure, and improve the safety of the system. The liquid nitrogen regulating valve is installed on the top outside of the insulation jacket, which is convenient for operation and maintenance, and can respond quickly, accurately control the liquid nitrogen flow rate, and ensure the accuracy and stability of temperature changes. Preferably, the pressure-bearing box is made of fast heat-conducting metal or specially treated fast temperature-changing material. By adopting the above technical solution, the thermal insulation performance of the pressure-bearing box is effectively improved, heat transfer is reduced, the temperature stability during low-pressure rapid temperature change is enhanced, energy consumption is reduced, and the service life of the equipment is extended. Preferably, the outer wall of the thermal insulation jacket is coated with a composite thermal insulation material layer, which includes an inner graphene thermal insulation layer and an outer polyurethane foam thermal insulation layer, the graphene thermal insulation layer has a thickness of 0.3 mm, the polyurethane foam thermal insulation layer has a thickness of 1.5 mm, the graphene thermal insulation layer is close to the outer wall of the thermal insulation jacket, and the polyurethane foam thermal insulation layer covers the outer surface of the graphene thermal insulation layer. By adopting the above technical solution, the outer wall of the thermal insulation jacket is coated with a composite thermal insulation material layer, including an inner graphene thermal insulation layer and an outer polyurethane foam thermal insulation layer. The graphene thermal insulation layer has a thickness of 0.3 mm, the polyurethane foam thermal insulation layer has a thickness of 1.5 mm, the graphene thermal insulation layer is close to the outer wall of the thermal insulation jacket, and the polyurethane foam thermal insulation layer covers the outer surface of the graphene thermal insulation layer. This structural design effectively improves the thermal insulation performance of the thermal insulation jacket, reduces heat transfer, reduces energy consumption, improves temperature control accuracy, and extends the service life of the equipment. Preferably, the wind speed of the stirring fan in the pressure box is adjustable, and the adjustment is achieved by a frequency converter, the frequency converter is installed on the external control panel of the pressure box, and the stirring fan in the pressure box is installed in the central position of the side wall of the pressure box. By adopting the above technical solution, the working frequency of the stirring fan in the pressure box is adjustable, which makes it possible to flexibly adjust the wind speed according to different test requirements and improve the temperature change efficiency and uniformity. The use of the frequency converter not only simplifies the operation process, but also improves the stability and reliability of the system. The stirring fan in the pressure box is installed in the central position of the side wall of the pressure box. This design helps to optimize the air flow path and further enhance the temperature change effect. Preferably, the wind speed frequency of the circulating fan in the insulation jacket is adjustable. By adopting the above technical solution, it is possible to flexibly adjust the working intensity of the fan according to the actual temperature change requirements and improve the temperature change efficiency and accuracy. The installation position of the power controller is reasonably designed to facilitate the operator to adjust and ensure the stability and reliability of the system.Preferably, the pumping speed of the vacuum pump is adjustable, the vacuum pump is connected to the vacuum valve through a hose, and the vacuum pump is installed on the outside of the insulation jacket. By adopting the above technical solution, the ability to quickly evacuate is ensured, the establishment time of the low pressure environment is effectively shortened, and the test efficiency is improved. The vacuum pump is connected to the vacuum valve through a hose, which ensures the stability and reliability of the connection and reduces the risk of air leakage. The vacuum pump is installed on the outside of the insulation jacket, which is convenient for maintenance and repair, and does not affect the compact design of the test cabin. Preferably, the liquid nitrogen regulating valve can respond quickly, the liquid nitrogen regulating valve is installed on the top side of the insulation jacket, the liquid nitrogen regulating valve is connected to the controller on the external control panel through a wire, and the controller is installed in the middle of the outer side of the insulation jacket. By adopting the above technical solution, the control accuracy and speed of the liquid nitrogen flow rate are significantly improved, so that the process of liquid nitrogen entering the insulation jacket is faster and more accurate. This not only speeds up the speed of the low pressure rapid temperature change process, but also improves the stability of the temperature change, thereby better meeting the needs of rapid temperature change testing. The liquid nitrogen regulating valve is installed on one side of the top of the insulation jacket and is connected to the controller on the external control panel through a wire, realizing remote and precise control, further enhancing the automation and intelligence level of the system.

[0004] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting the liquid nitrogen refrigeration rapid cooling mode, the liquid nitrogen is quickly gasified and circulated in the insulation jacket through the control of the liquid nitrogen regulating valve and the one-way valve, thereby driving the low-pressure rapid cooling in the pressure box, significantly improving the temperature change speed and efficiency; 2. Combined with the electrically controlled refrigeration device and the jacket heater, not only the conventional high and low temperature and low pressure functions are realized, but also the flexible switching under different test conditions is realized, thereby improving the applicability and flexibility of the test device; 3. The synergistic effect of the vacuum pump and the vacuum valve, by evacuating the pressure box, effectively reduces the air pressure, realizes the rapid temperature change in the low pressure environment, and solves the problem of unstable air pressure control in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a structural schematic diagram of a low-pressure rapid temperature change functional device in an embodiment of the present application.

[0006] Figure numerals: 100, pressure box; 101, stirring fan in pressure box; 102, vacuum pump; 103, vacuum electric ball valve; 200, insulation jacket; 201, circulation fan in insulation jacket; 202, jacket evaporator; 203, jacket heater; 204, electric control cooling device; 205, liquid nitrogen device; 206, one-way valve; 207, liquid nitrogen regulating valve. DETAILED DESCRIPTION

[0007] The following will be combined with the attached Figure 1, a clear and complete description of the technical solutions in the embodiments of the present invention is given. The described embodiments are only possible technical implementations of the present invention, and not all implementations are possible. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the protection scope of the present invention. The inventor of the present application found that the prior art can only realize conventional low-pressure temperature change tests, and cannot efficiently realize low-pressure rapid temperature change tests. For this reason, the present application mainly adopts the following technical solutions: a low-pressure rapid temperature change functional device, including a pressure box 100 and an insulation jacket 200, the pressure box 100 and the insulation jacket 200 are independent entities, the insulation jacket 200 is covered on the outside of the pressure box 100, and a liquid nitrogen device 205 and a liquid nitrogen regulating valve 207 are provided on the outside of the insulation jacket 200. , a one-way valve 206, the insulation jacket 200 is also provided with an insulation jacket internal circulation fan 201, the pressure box 100 is provided with a pressure box internal stirring fan 101, the pressure box 100 is connected to a vacuum valve 103 on the outside of the insulation jacket 200, and the vacuum valve 103 is connected to a vacuum pump 102. The pressure box 100 radiates heat and cold through rapid gas cooling and heating outside the insulation jacket 200, thereby realizing internal low-pressure rapid cooling and heating, and achieving the effect of low-pressure rapid temperature change. The following is a further detailed description of this application. Example 1: With reference to Figure 1The low-pressure rapid temperature change functional device provided in the embodiment of the present application comprises a pressure box 100 and an insulation jacket 200, the pressure box 100 and the insulation jacket 200 are independent entities, and the insulation jacket 200 is covered on the outside of the pressure box 100. A liquid nitrogen device 205, a liquid nitrogen regulating valve 207, and a one-way valve 206 are arranged on the outside of the insulation jacket 200, and an insulation jacket internal circulation fan 201 is also arranged inside the insulation jacket 200, and a pressure box internal stirring fan 101 is arranged inside the pressure box 100. The pressure box 100 is connected to a vacuum valve 103 on the outside of the insulation jacket 200, and the vacuum valve 103 is connected to a vacuum pump 102. The pressure box 100 radiates heat and cold through the rapid gas cooling and heating outside the insulation jacket 200, thereby realizing internal low-pressure rapid cooling and heating. Specifically, the pressure box 100 includes a stirring fan 101 and a vacuum pump 102 in the pressure box. The stirring fan 101 in the pressure box is installed at the central position of the side wall of the pressure box 100. The working frequency is adjustable and can be adjusted within the range of 10 Hz to 50 Hz. It is realized by a frequency converter, and the frequency converter is installed on the external control panel of the pressure box 100. The maximum suction rate of the vacuum pump 102 is 50 cubic meters per hour. It is connected to the vacuum valve 103 through a hose. The hose is 2 meters long and 10 centimeters in diameter. The vacuum pump 102 is installed on the outside of the insulation jacket 200. The inner wall of the pressure box 100 is provided with a multi-layer thermal insulation coating, which includes an inner ceramic thermal insulation layer and an outer metal thermal insulation layer. The thickness of the ceramic thermal insulation layer is 0.5 mm, and the thickness of the metal thermal insulation layer is 1 mm. The ceramic thermal insulation layer is close to the inner wall of the pressure box 100, and the metal thermal insulation layer covers the outer surface of the ceramic thermal insulation layer. The insulation jacket 200 includes an insulation jacket internal circulation fan 201, a jacket heater 203 and an electrically controlled cooling device 204. The insulation jacket internal circulation fan 201 is installed at the bottom center of the insulation jacket 200, and the working power is adjustable, which can be adjusted within the range of 50 watts to 200 watts, and is realized by a power controller, and the power controller is installed on the external control panel of the insulation jacket 200. The jacket heater 203 is installed inside the insulation jacket 200, and the electrically controlled cooling device 204 is installed on one side of the insulation jacket 200, and the two are connected by a wire, and the electrically controlled cooling device 204 is located at the lower part of the insulation jacket 200, and the jacket heater 203 is located inside the insulation jacket 200. The outer wall of the thermal insulation jacket 200 is covered with a composite thermal insulation material layer, which includes an inner graphene thermal insulation layer and an outer polyurethane foam thermal insulation layer. The graphene thermal insulation layer is 0.3 mm thick and the polyurethane foam thermal insulation layer is 1.5 mm thick. The graphene thermal insulation layer is close to the outer wall of the thermal insulation jacket 200, and the polyurethane foam thermal insulation layer covers the outer surface of the graphene thermal insulation layer.The liquid nitrogen device 205 is connected to the liquid nitrogen regulating valve 207 and the one-way valve 206 in sequence through the first pipeline, and the one-way valve 206 is connected to the inside of the insulation jacket 200 through the second pipeline. The first pipeline and the second pipeline are both provided with a fixed bracket, which is fixed on the outer wall of the insulation jacket 200 to ensure that the pipeline connection is stable and reliable. The liquid nitrogen regulating valve 207 is installed on the top outer side of the insulation jacket 200, and the response time is 0.1 seconds. It is connected to the controller on the external control panel through a wire, and the controller is installed in the middle of the outer side of the insulation jacket 200. There is a gap distance of 2 cm between the pressure box 100 and the insulation jacket 200, and the gap distance is kept constant by a plurality of fixed supports. The fixed supports are evenly distributed between the pressure box 100 and the insulation jacket 200. The height of each fixed support is 2 cm, and the material is stainless steel. The top end of the fixed support is fixed on the inner wall of the insulation jacket 200, and the bottom end is fixed on the outer wall of the pressure box 100. In addition, in order to further improve the flexibility and adaptability of the system, a layer of dynamically adjustable thermal insulation material can be added between the pressure box 100 and the insulation jacket 200. The material can automatically adjust its thermal insulation performance according to the actual test requirements, such as using phase change materials or adjustable resistance materials, so as to provide the best thermal insulation effect under different temperature conditions. This dynamically adjustable thermal insulation material can not only reduce energy loss, but also maintain a stable test environment under extreme temperature changes. The implementation principle of this embodiment is: 1. When low-pressure rapid temperature change is required, the liquid nitrogen device 205 produces liquid nitrogen, opens the liquid nitrogen regulating valve 207, and the liquid nitrogen flows to the inside of the insulation jacket 200 through the one-way valve 206. After the liquid nitrogen is gasified, the jacket is quickly cooled by the circulation fan 201 in the insulation jacket. At the same time, the stirring fan 101 in the pressure box 100 is running, the vacuum valve 103 is opened, and the vacuum pump 102 evacuates the pressure box. The pressure box 100 radiates heat and cold through the fast gas rapid cooling and heating outside the insulation jacket 200, thereby realizing rapid cooling and heating of the internal low pressure, and achieving the effect of rapid temperature change at low pressure. 2. When conducting a conventional low pressure temperature change test, the liquid nitrogen device 205 is closed, the electrically controlled cooling device 204 is working, and the jacket heater 203 and the jacket evaporator 204 are heated and cooled. At the same time, the stirring fan 101 inside the pressure box 100 is running, the vacuum valve 103 is opened, and the vacuum pump 102 evacuates the pressure box. The pressure box 100 radiates heat and cold through the cooling and heating outside the insulation jacket 200, thereby realizing conventional cooling and heating of the internal low pressure, and achieving the conventional temperature change requirements of low pressure. The advantages of this embodiment are: 1. The liquid nitrogen refrigeration rapid cooling mode realizes rapid cooling at low pressure, improving the test efficiency and accuracy. 2. The combination of multiple cooling and heating methods enables the device to achieve both rapid and conventional temperature changes, and has a wide range of applications.3. The design of the pressure box and the insulation jacket effectively isolates the internal and external environments, reduces energy loss, and improves the stability and reliability of the test. 4. The synergistic effect of the vacuum pump and the stirring fan ensures uniform distribution of air pressure and temperature in the test chamber, and improves the accuracy of the test results. Example 2: The difference between this embodiment and the above embodiment is that an additional insulation layer is added between the pressure box 100 and the insulation jacket 200 to further improve the insulation effect. The additional insulation layer includes a layer of calcium silicate insulation board and a layer of aerogel insulation board. The thickness of the calcium silicate insulation board is 1 mm, and the thickness of the aerogel insulation board is 0.5 mm. The calcium silicate insulation board is close to the outer wall of the pressure box 100, and the aerogel insulation board covers the outer surface of the calcium silicate insulation board. In addition, in order to further improve the flexibility and adaptability of the system, a layer of dynamically adjustable thermal insulation material can be added between the pressure box 100 and the insulation jacket 200. The material can automatically adjust its thermal insulation performance according to the actual test requirements, such as using phase change materials or adjustable resistance materials, so as to provide the best thermal insulation effect under different temperature conditions. This dynamically adjustable thermal insulation material can not only reduce energy loss, but also maintain a stable test environment under extreme temperature changes. The implementation principle of this embodiment is as follows: 1. A layer of calcium silicate insulation board and a layer of aerogel insulation board are added on the original basis. This additional thermal insulation layer further reduces heat conduction, improves the thermal insulation effect, reduces the impact of the external environment on the temperature in the test cabin, and ensures the temperature stability during the test. 2. The other operating steps are the same as those in Example 1, including the realization of the liquid nitrogen refrigeration rapid cooling mode and the conventional high and low temperature and low pressure functions. The advantages of this embodiment are: 1. The additional thermal insulation layer significantly improves the thermal insulation effect, further reduces energy loss, and improves the stability and reliability of the test. 2. It is suitable for application scenarios with higher requirements for temperature control, such as testing in aerospace, precision instruments and other fields. Embodiment 3: The difference between this embodiment and the above embodiments is that a cooling water circulation system is added to the outer wall of the insulation jacket 200 to further reduce the impact of the external environment on the insulation jacket 200. The cooling water circulation system includes a cooling water pump, a cooling water pipe and a radiator. The cooling water pump is installed on the outside of the insulation jacket 200, the cooling water pipe surrounds the outer wall of the insulation jacket 200, and the radiator is installed at the end of the cooling water pipe. The cooling water circulates through the cooling water pipe to take away the heat of the outer wall of the insulation jacket 200 to ensure the temperature stability of the insulation jacket 200. In addition, in order to further improve the flexibility and adaptability of the system, an intelligent temperature control module can be added to the cooling water circulation system. The module can automatically adjust the flow and temperature of the cooling water according to the actual test requirements, thereby providing the best cooling effect under different test conditions. This intelligent temperature control module can not only improve the stability of the system, but also maintain a stable test environment under extreme temperature changes.The implementation principle of this embodiment is: 1. The cooling water circulation system delivers cooling water into the cooling water pipe through the cooling water pump. The cooling water flows along the outer wall of the insulation jacket 200, taking away the heat from the external environment, and ensuring the temperature of the insulation jacket 200 is stable. 2. The other operating steps are the same as those in Example 1, including the realization of the liquid nitrogen refrigeration rapid cooling mode and the conventional high and low temperature and low pressure functions. The advantages of this embodiment are: 1. The cooling water circulation system effectively reduces the impact of the external environment on the insulation jacket 200, ensuring that the temperature in the test cabin is more stable. 2. It is particularly suitable for long-term testing or testing in high temperature environments, which improves the reliability and accuracy of the test. Example 4: The difference between this embodiment and the above embodiments is that a humidity control module is added inside the pressure box 100 to achieve humidity control in a low pressure environment. The humidity control module includes a humidifier and a dehumidifier. The humidifier is installed at the bottom of the pressure box 100, and the dehumidifier is installed at the top of the pressure box 100. The humidifier and the dehumidifier are connected to the controller on the external control panel through a wire, and the controller is installed in the middle of the outer side of the pressure box 100. In addition, in order to further improve the flexibility and adaptability of the system, an intelligent humidity sensor can be added to the humidity control module. The sensor can monitor the humidity changes in the pressure box 100 in real time, and automatically adjust the working state of the humidifier and the dehumidifier according to the actual test requirements, so as to provide the best humidity control effect under different test conditions. This intelligent humidity sensor can not only improve the stability of the system, but also maintain a stable test environment under extreme humidity changes. The implementation principle of this embodiment is: 1. The humidifier and the dehumidifier adjust the working state through the controller to realize the humidity control inside the pressure box 100. When the humidity needs to be increased, the humidifier is started, and the water is atomized and released into the pressure box 100; when the humidity needs to be reduced, the dehumidifier is started to absorb and discharge the water in the air. 2. Other operating steps are the same as those in Example 1, including the realization of the liquid nitrogen refrigeration rapid cooling mode and the conventional high and low temperature and low pressure functions. The advantages of this embodiment are: 1. The addition of the humidity control module enables the device to not only achieve rapid temperature change at low pressure, but also achieve humidity control, thereby expanding the scope of application. 2. It is particularly suitable for test scenarios that require simultaneous control of temperature and humidity, such as electronic components, material aging tests, etc. Example 5 The difference between this embodiment and the above-mentioned embodiments is that a pressure sensor and a temperature sensor are added to the inside of the insulation jacket 200 to monitor the pressure and temperature changes in the pressure box 100 in real time. The pressure sensor and the temperature sensor are connected to the display on the external control panel through wires. The display is installed in the middle of the outer side of the insulation jacket 200 to display the pressure and temperature data in the pressure box 100 in real time.In addition, in order to further improve the flexibility and adaptability of the system, an intelligent data acquisition module can be added on the basis of the pressure sensor and the temperature sensor. The module can collect and store the pressure and temperature data in the pressure box 100 in real time, and transmit the data to the remote monitoring center through the wireless communication module, so as to realize real-time monitoring and data analysis. This intelligent data acquisition module can not only improve the stability of the system, but also timely discover and solve problems under remote monitoring. The implementation principle of this embodiment is: 1. The pressure sensor and the temperature sensor monitor the pressure and temperature changes in the pressure box 100 in real time, and transmit the data to the display on the external control panel through the wire. The operator can view the pressure and temperature conditions in the pressure box 100 in real time through the display. 2. The other operating steps are the same as those in Example 1, including the realization of the liquid nitrogen refrigeration rapid cooling mode and the conventional high and low temperature and low pressure function. The advantages of this embodiment are: 1. The addition of the pressure sensor and the temperature sensor enables the operator to monitor the pressure and temperature changes in the pressure box 100 in real time, which improves the controllability and accuracy of the test. 2. It is particularly suitable for test scenarios that require real-time monitoring, such as long-term experiments, automated testing, etc. The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-pressure rapid temperature change functional device, characterized in that: The invention comprises a pressure-bearing box (100) and a heat-insulating jacket (200), wherein the pressure-bearing box (100) and the heat-insulating jacket (200) are independent entities, the heat-insulating jacket (200) is arranged outside the pressure-bearing box (100), a liquid nitrogen device (205), a liquid nitrogen regulating valve (207), and a one-way valve (206) are arranged outside the heat-insulating jacket (200), and a heat-insulating jacket internal circulation fan is also arranged inside the heat-insulating jacket (200). (201), a pressure-bearing box internal stirring fan (101) is provided in the pressure-bearing box (100), the pressure-bearing box (100) is connected to a vacuum valve (103) on the outside of the thermal insulation jacket (200), and the vacuum valve (103) is connected to a vacuum pump (102), and the pressure-bearing box (100) radiates heat and cold through rapid gas cooling and heating outside the thermal insulation jacket (200), thereby realizing rapid cooling and heating at low internal pressure.

2. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The thermal insulation jacket (200) further comprises a jacket heater (203) and an electrically controlled cooling device (204); the electrically controlled cooling device (204) is installed on one side of the thermal insulation jacket (200); the jacket heater (203) is installed inside the thermal insulation jacket (200); the electrically controlled cooling device (204) and the jacket heater (203) are connected via a wire; the electrically controlled cooling device (204) is located at the bottom of the thermal insulation jacket (200); and the jacket heater (203) is located inside the thermal insulation jacket (200), together realizing conventional high-low-temperature and low-pressure functions.

3. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The liquid nitrogen device (205) is connected to a liquid nitrogen regulating valve (207) and a one-way valve (206) in sequence via a first pipeline; the one-way valve (206) is connected to the interior of the thermal insulation jacket (200) via a second pipeline; the first pipeline and the second pipeline are both provided with a fixing bracket, the fixing bracket being fixed on the outer wall of the thermal insulation jacket (200) to ensure that the pipeline connection is stable and reliable; the liquid nitrogen regulating valve (207) is installed on the outside of the top of the thermal insulation jacket (200).

4. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The pressure-bearing box (100) is made of fast heat-conducting metal or specially treated fast temperature-changing material.

5. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The outer wall of the thermal insulation jacket (200) is coated with a composite thermal insulation material layer, the composite thermal insulation material layer comprises an inner graphene thermal insulation layer and an outer polyurethane foam thermal insulation layer, the graphene thermal insulation layer has a thickness of 0.3 mm, the polyurethane foam thermal insulation layer has a thickness of 1.5 mm, the graphene thermal insulation layer is in close contact with the outer wall of the thermal insulation jacket (200), and the polyurethane foam thermal insulation layer covers the outer surface of the graphene thermal insulation layer.

6. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The wind speed of the stirring fan (101) in the pressure-bearing box is adjustable, and the adjustment is achieved through a frequency converter, which is installed on an external control panel of the pressure-bearing box (100). The stirring fan (101) in the pressure-bearing box is installed at the center of the side wall of the pressure-bearing box (100).

7. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The wind speed frequency of the circulating fan (201) in the thermal insulation jacket is adjustable.

8. The low-pressure rapid temperature change functional device according to claim 1, characterized in that: The pumping speed of the vacuum pump (102) is adjustable. The vacuum pump (102) is connected to a vacuum valve (103) via a hose. The vacuum pump (102) is installed outside the thermal insulation jacket (200).

9. The low-pressure rapid temperature change functional device according to claim 3, characterized in that: The liquid nitrogen regulating valve (207) can respond quickly. The liquid nitrogen regulating valve (207) is installed on one side of the top of the thermal insulation jacket (200). The liquid nitrogen regulating valve (207) is connected to a controller on an external control panel via a wire. The controller is installed at the middle of the outer side of the thermal insulation jacket (200).

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