Pressure adaptability testing device of refrigerant monitoring system

Abstract

The invention relates to the technical field of air conditioner safety testing, in particular to a pressure adaptability testing device of a refrigerant monitoring system, which consists of a testing bin, an air pressure adjusting system, an automatic control system and a data acquisition and processing system. According to the pressure adaptability testing device, based on a feedback pressure automatic control mode and a high-low pressure intelligent control method, rapid adjustment and accurate control of pressure can be achieved, operability is high, the automation degree is high, the timeliness and reliability of testing can be greatly improved, and the pressure adaptability testing device has universal popularization significance.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner safety testing, and particularly to a pressure adaptability testing device for a refrigerant monitoring system. Background Art

[0002] The Montreal Protocol requires the control of all Freon refrigerants to protect the ozone layer. Refrigerant replacement, as an important factor affecting the technological development of the refrigeration and air conditioning industry, has become a major issue that has received extensive attention and research in the industry. In terms of short-term replacement options, R32 is the main preferred replacement option for household air conditioners in China, Japan, and European countries or regions at present, while R454B is mainly used as the main preferred replacement option in North America; in terms of long-term replacement options, R290, as a natural refrigerant, has become the long-term preferred replacement option in China, European countries or regions. The safety levels of R32 and R454B are A2L, belonging to weakly flammable refrigerants, and the safety level of R290 is A3, belonging to flammable and explosive refrigerants. Therefore, there are certain combustion and explosion risks for both R32, R454B, or R290. To ensure safety during use, effective safety measures for products using such refrigerants are clearly specified in national safety standards to prevent combustion or explosion after leakage. As one of the important means to improve the safety of air conditioners using flammable refrigerants, the technical requirements and test methods for the pressure test related to refrigerant sensors are clearly specified in the US standard UL 60335-2-40; at the same time, international standards and other relevant national standards are also in the process of continuous improvement, and the pressure adaptability issue will receive more extensive attention as an important technical indicator. For this reason, the present application proposes a pressure adaptability testing device for a refrigerant monitoring system to detect the use effect of the refrigerant monitoring system under specified pressure conditions. Summary of the Invention

[0003] Based on this, it is necessary to provide a pressure adaptability testing device for a refrigerant monitoring system to achieve the detection of the refrigerant monitoring system in terms of pressure adaptability testing for the above technical problems.

[0004] The present invention provides a pressure adaptability test device for a refrigerant monitoring system, comprising: a test chamber, which is composed of an upper chamber for placing a test sample and simulating the initial test environment of the test sample and a lower chamber for adjusting the pressure change in the test chamber. The upper chamber and the lower chamber are connected and communicate with each other to provide set test conditions for the test sample and conduct pressure adaptability tests; a pneumatic regulation system, comprising: an inflatable elastomer and a gas injection / extraction device. The inflatable elastomer is arranged inside the lower chamber, and the gas injection / extraction device penetrates the lower chamber through a main pneumatic regulation pipeline and is connected to the inflatable elastomer to inflate or extract gas from the inflatable elastomer; an automatic control system, comprising: a control element and a pressure measurement element. The pressure measurement element, the gas injection / extraction device, and the gas injection / extraction device are electrically connected to the control element respectively. The pressure measurement element is arranged at the top of the test chamber, and the test end of the pressure measurement element penetrates the test chamber and extends into the upper chamber to measure the real-time pressure in the test chamber, send the real-time pressure output signal to the control element, and transmit it to the data acquisition and processing system via the control element; after the control element responds to the output signal of the data acquisition and processing system, it controls the gas injection / extraction device; a data acquisition and processing system, which is electrically connected to the test sample and the control element respectively, for collecting, storing, and displaying the output signals of the test sample and the control element. The output signal of the control element includes the real-time pressure output signal of the pressure measurement element, and sets corresponding test conditions according to the test procedures required in the standard, and sends the output signals corresponding to the test conditions to the control element.

[0005] Optionally, the test chamber includes: a top plate, a bottom plate, and an enclosure structure. The enclosure structure is a hollow shell structure with openings at both the top and the bottom. The top plate is movably and sealingly fitted with the top end of the enclosure structure, the bottom plate is fixedly connected to the bottom of the enclosure structure, a shelf is fixedly installed inside the enclosure structure, and through holes are formed in the shelf for placing the test sample. An upper chamber is formed between the top plate, the enclosure structure, and the shelf, and a lower chamber is formed between the bottom plate, the enclosure structure, and the shelf.

[0006] Optionally, sample power supply threading holes and through-plate joint openings are formed in the enclosure structure. Among them, the sample power supply threading holes are used for threading the power supply and signal lines of the test sample, and the through-plate joint openings are used for threading the main pneumatic regulation pipeline connected to the inflatable elastomer. A pressure measurement element interface is formed in the top plate for threading the test end of the pressure measurement element.

[0007] Optionally, a sealing ring is provided between the top plate and the enclosure structure for surrounding the top opening of the enclosure structure. The sealing ring is arranged on the inner four sides of the top opening of the enclosure structure to increase the sealing performance between the top plate and the enclosure structure. After the top plate and the enclosure structure are covered, they are fixed by a locking member.

[0008] Optionally, the main air pressure regulating pipeline includes: a gas injection / extraction device, a first electromagnetic valve, and an inflatable elastomer connected in sequence, for inflating or extracting air from the inflatable elastomer.

[0009] Optionally, the gas injection / extraction device includes: a first air pressure regulating circuit, a second air pressure regulating circuit, an air injection pump, a second electromagnetic valve, a third electromagnetic valve, and a vacuum pump. The first air pressure regulating circuit includes: an air injection pump, a second electromagnetic valve, and the main air pressure regulating pipeline connected in sequence, for inflating the inflatable elastomer through the main air pressure regulating pipeline. The second air pressure regulating circuit includes: a vacuum pump, a third electromagnetic valve, and the main air pressure regulating pipeline connected in sequence, for extracting air from the inflatable elastomer through the main air pressure regulating pipeline. The first air pressure regulating circuit and the second air pressure regulating circuit are in a parallel relationship. The first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the air injection pump, and the vacuum pump are respectively electrically connected to a control element, for the control element to execute the control of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the air injection pump, and the vacuum pump after responding to the output signal of the data acquisition and processing system.

[0010] Optionally, when the inflatable elastomer is in a state of being filled with gas, the volume ratio to the internal volume of the test chamber is 1:3, for realizing pressure regulation under the set test conditions. The pressure regulation range of the set test conditions is 80 kPa to 120 kPa.

[0011] Optionally, the inflatable elastomer is made of one of rubber, plastic, and latex.

[0012] Optionally, the pressure measuring element is a pressure gauge or a pressure transmitter.

[0013] Optionally, the data acquisition and processing system includes: a data collector and a data processing unit. The data collector is respectively electrically connected to the test sample, the control element, and the data processing unit. The data processing unit is electrically connected to the control element. The data collector is used to collect the output signals of the test sample and the control element and upload them to the data processing unit. The data processing unit receives, stores, and displays the output signals of the test sample and the control element in real time, and sets the corresponding test conditions according to the test process required in the UL 60335-2-40 standard, and sends the output signals under the corresponding test conditions to the control element.

[0014] The advantages and beneficial effects of the present invention are as follows: A pressure adaptability test device for a refrigerant monitoring system provided by the present invention is equipped with a pneumatic regulation system, an automatic control system, and a data acquisition and processing system. Based on the feedback-based pressure automatic control mode and the high and low pressure intelligent control method, it can achieve rapid pressure regulation and precise control, has strong operability, a high degree of automation, can greatly improve the timeliness and reliability of the test, and has general promotional significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the pressure adaptability test device for the refrigerant monitoring system provided by Embodiment 1 of the present invention.

[0016] Figure 2 It is a control schematic diagram of the automatic control system provided by Embodiment 1 of the present invention.

[0017] Figure 3 It is a method flow chart of the pressure adaptability test method for the refrigerant monitoring system provided by Embodiment 2 of the present invention.

[0018] Figure 4 It is a method flow chart of the pressure adaptability test method for the refrigerant monitoring system provided by Embodiment 3 of the present invention.

[0019] Reference numerals: test chamber 1, first solenoid valve 101, second solenoid valve 102, third solenoid valve 103, inflatable elastomer 2, enclosure structure 201, sample power supply threading hole 202, shelf 203, through-board joint opening 204, pressure measurement element interface 205, top plate 206, bottom plate 207, test sample 3, gas injection pump 4, vacuum pump 5, control element 6, data acquisition and processing system 7, pressure measurement element 8, power supply and signal line 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application. And without conflict, the features in the following embodiments and the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] Embodiment 1

[0023] Refer to the appendix Figure 1 , the present application provides a pressure adaptability test device for a refrigerant monitoring system, and this device is used to perform a pressure adaptability test on a test sample 3 (i.e., the refrigerant monitoring system, which is the refrigerant sensor to be tested).

[0024] In this embodiment, a pressure adaptability test device for a refrigerant monitoring system includes: a test chamber 1, a gas pressure adjustment system, an automatic control system, and a data acquisition and processing system 7.

[0025] In this embodiment, refer to the appendix Figure 1 , the test chamber 1 is composed of an upper chamber for placing the test sample 3 and simulating the initial test environment of the test sample 3, and a lower chamber for adjusting the pressure change in the test chamber 1. The upper chamber and the lower chamber are in communication with each other, and are used to provide set test conditions for the test sample 3 and perform a pressure adaptability test.

[0026] In this embodiment, the test chamber 1 is composed of a top plate 206, a bottom plate 207, an enclosure structure 201, and a shelf 203. The enclosure structure 201 is a hollow shell structure with openings at both the top and bottom. The top plate 206 is movably and sealingly fitted with the top end of the enclosure structure 201. The bottom plate 207 is fixedly connected to the bottom of the enclosure structure 201. A shelf 203 is fixedly installed inside the enclosure structure 201. Through holes are formed in the shelf 203 for placing the test sample 3. An upper chamber is formed between the top plate 206, the enclosure structure 201, and the shelf 203, and a lower chamber is formed between the bottom plate 207, the enclosure structure 201, and the shelf 203. Among them, the top plate 206, the bottom plate 207, and the enclosure structure 201 of the test chamber 1 can all be made of acrylic or stainless steel, and the shelf 203 can be a stainless steel mesh structure. At the same time, the top plate 206 is a movable structure, and the top plate 206 is movably and sealingly fitted with the top end of the enclosure structure 201. To ensure the sealing performance between the top plate 206 and the enclosure structure 201, the present application also provides a sealing ring between the top plate 206 and the enclosure structure 201 for surrounding the top opening of the enclosure structure 201. The sealing ring is arranged on the inner four sides of the top opening of the enclosure structure 201 to increase the sealing performance between the top plate 206 and the enclosure structure 201. After the top plate 206 and the enclosure structure 201 are covered, they are fixed by a locking member. In addition, the components of the test chamber 1 can be connected in the following manner: During the test process, the top plate 206, the bottom plate 207, and the enclosure structure 201 need to form a sealed structure. The enclosure structure 201 and the top plate 206 are sealed with a sealing ring and fixed by a locking member (such as a buckle) after being covered. The enclosure structure 201 and the bottom plate 207 are fixedly connected by welding, and the shelf 203 and the enclosure structure 201 are fixedly connected by welding. During the test, the test sample 3 is placed on the partition plate, and the power supply line of the test sample 3 is connected to an external power supply through the sample power supply wire passing hole 202.

[0027] In this embodiment, a sample power supply wire passing hole 202 and a through-plate joint opening 204 are formed in the enclosure structure 201. Among them, the sample power supply wire passing hole 202 is used for passing the power supply and signal lines 9 of the test sample 3, and the through-plate joint opening 204 is used for passing the main air pressure regulation pipeline communicating with the inflatable elastic body 2. A pressure measurement element interface 205 is formed in the top plate 206 for passing the test end of the pressure measurement element 8, and in order to prevent excessive internal pressure from damaging the test chamber 1, a pressure relief valve interface can also be correspondingly formed in the top plate 206.

[0028] In this embodiment, the air pressure regulation system involved in the present application is composed of an inflatable elastic body 2 and a gas injection and extraction device. Among them, the inflatable elastic body 2 is arranged inside the lower chamber, and the gas injection and extraction device passes through the lower chamber through the main air pressure regulation pipeline and is connected to the inflatable elastic body 2 for inflating or extracting gas from the inflatable elastic body 2.

[0029] In this embodiment, the inflatable elastomer 2 is a variable-volume airbag, and its material includes but is not limited to rubber, plastic, latex, etc., as long as the internal volume of the airbag can be changed, and it can be flexibly selected according to the actual situation, and will not be limited here; at the same time, the gas injection and extraction device is composed of a first air pressure regulation circuit, a second air pressure regulation circuit, an air injection pump 4, a second solenoid valve 102, a third solenoid valve 103, and a vacuum pump 5; the components of the air pressure regulation system can be connected in the following manner: The air pressure regulation system is provided with an air pressure regulation main pipeline, and the air pressure regulation main pipeline includes a gas injection and extraction device, a first solenoid valve 101, and an inflatable elastomer 2 connected in sequence, and is used for inflating or extracting the inflatable elastomer 2; the gas injection and extraction device is provided with a first air pressure regulation circuit and a second air pressure regulation circuit. The first air pressure regulation circuit includes an air injection pump 4, a second solenoid valve 102, and an air pressure regulation main pipeline connected in sequence, and is used for inflating the inflatable elastomer 2 through the air pressure regulation main pipeline. The second air pressure regulation circuit includes a vacuum pump 5, a third solenoid valve 103, and an air pressure regulation main pipeline connected in sequence, and is used for extracting the inflatable elastomer 2 through the air pressure regulation main pipeline. Moreover, the first air pressure regulation circuit and the second air pressure regulation circuit are in a parallel relationship. The first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 103, the air injection pump 4, and the vacuum pump 5 are respectively electrically connected to the control element 6, and are used for the control element 6 to execute the control of the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 103, the air injection pump 4, and the vacuum pump 5 after responding to the output signal of the data acquisition and processing system 7.

[0030] In this embodiment, when the inflatable elastomer 2 is in a state of being filled with gas, that is, when the internal pressure is 1 Bar, the volume ratio relationship with the internal volume of the test chamber 1 is 1:3, so as to achieve a pressure regulation range of 80 kPa to 120 kPa.

[0031] In this embodiment, the automatic control system includes: a control element 6 and a pressure measurement element 8. The pressure measurement element 8, the gas injection and extraction device, and the gas injection and extraction device are respectively electrically connected to the control element 6. The pressure measurement element 8 is arranged on the top of the test chamber 1, and the test end of the pressure measurement element 8 penetrates the test chamber 1 and extends into the upper chamber body, and is used for measuring the real-time pressure in the test chamber 1, sending the real-time pressure output signal to the control element 6, and transmitting it to the data acquisition and processing system 7 through the control element 6; after the control element 6 responds to the output signal of the data acquisition and processing system 7, it executes the control of the gas injection and extraction device.

[0032] In this embodiment, refer to the appendix Figure 2, the control element 6 includes but is not limited to a programmable logic controller (PLC). The PLC includes an input end and an output end. Its input end is electrically connected to the pressure measuring element 8, and its output end has five electrically controlled branches, which are respectively electrically connected to the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 103, the air injection pump 4, and the vacuum pump 5.

[0033] In this embodiment, the pressure measuring element 8 is arranged on the top plate 206 of the test chamber 1, and is used to test the real-time pressure in the test chamber 1 and synchronously send the real-time pressure output signal to the control element 6. The pressure measuring element 8 includes but is not limited to a pressure gauge, a pressure transmitter, etc.

[0034] In this embodiment, there is a data acquisition and processing system 7. The data acquisition and processing system 7 is electrically connected to the test sample 3 and the control element 6 respectively, and is used to collect, store and display the output signals of the test sample 3 and the control element 6. The output signal of the control element 6 includes the real-time pressure output signal of the pressure measuring element 8, and sets corresponding test conditions according to the test process required in the standard, and sends the output signal of the corresponding test conditions to the control element 6.

[0035] In this embodiment, the data acquisition and processing system 7 involved in the present application is composed of a data collector and a data processing unit. Among them, the data collector includes but is not limited to collecting the output signals of the test sample 3 and the control element 6 and uploading them to the data processing unit; the data processing unit is composed of a computer and test software installed in the computer. The test software can be developed by including but not limited to C#, VB, Labview, Python, etc.; the data processing unit reads the data uploaded by the data collector in real time, saves and displays the test data, and has a graphic display function. At the same time, before the test, the operator can set the corresponding test conditions on the data processing unit according to the test process required in the standard, and send the output signal of the corresponding test conditions to the control element 6, so that after the control element 6 responds to the output signal of the data acquisition and processing system 7, it controls the first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 103, the air injection pump 4, and the vacuum pump 5.

[0036] Embodiment 2

[0037] Refer to Appendix Figure 3 , a test method for performing a pressure test using the pressure adaptability test device of the refrigerant monitoring system of Embodiment 1 includes the following steps.

[0038] S101. Sample preparation and test preparation: Place the test sample on the shelf in the test chamber, electrically connect the power supply and signal lines of the test sample to an external power supply and a data collector, power on the pressure adaptability test device, set the corresponding test conditions according to the test procedures required in the standard, and send the output signals of the corresponding test conditions to the control element, and the control element responds to the output signals of the data processing unit.

[0039] S102. Low-pressure test: First, manually open the top plate, fill the inflatable elastic body with gas, then close the top plate cover and fix it at the top of the enclosure through the locking member. Then, open the third solenoid valve and the vacuum pump. After waiting for 15 s, open the first solenoid valve, and operate the vacuum pump according to the preset test conditions to adjust the pressure in the test chamber to reach the first target pressure value. Then, turn off the vacuum pump, the first solenoid valve, and the third solenoid valve. Subsequently, the test sample is exposed under this condition for at least 1 h.

[0040] In this embodiment, the first target pressure value is the lower of 80 kPa or the minimum pressure of the test sample; further, the requirement of this low-pressure test is that the test sample needs to be exposed to the lower of 80 kPa or the minimum pressure of the test sample for at least 1 hour.

[0041] S103. High-pressure test method: First, manually open the top plate, empty the gas in the inflatable elastic body, then close the top plate cover and fix it at the top of the enclosure through the locking member. Then, open the second solenoid valve and the air injection pump. After waiting for 15 s, open the first solenoid valve, and operate the air injection pump according to the preset test conditions to adjust the pressure in the test chamber to reach the second target pressure value. Then, turn off the air injection pump, the first solenoid valve, and the second solenoid valve. Subsequently, the test sample is exposed under this condition for at least 1 h.

[0042] In this embodiment, the second target pressure value is the higher of 110 kPa or the maximum pressure of the test sample; further, the requirement of this high-pressure test is that the test sample needs to be exposed to the higher of 110 kPa or the maximum pressure of the test sample for at least 1 hour.

[0043] S104. Test verification: After completing S102 and S103, use other test devices to verify the concentration response of the test sample.

[0044] In this embodiment, the requirements for the verification test include: (1) At each test pressure, when the test sample is placed in an environment with a refrigerant concentration of 25% of the LFL, the test sample shall emit an output signal within 30 s; (2) Referring to the American standard UL 60335-2-40, the test sample shall be exposed to a step change in the gas volume ratio from clean air to the test gas specified in Appendix LL.2 within 5 s, and the test sample shall emit an output signal within 30 s after the step change is completed.

[0045] Embodiment III

[0046] Reference appendix Figure 4 , adopt the test method of the pressure test with the pressure adaptability test device of the refrigerant monitoring system in Embodiment I, including the following test processes.

[0047] (1) On the premise that the sample is ready, turn on the power of the test device to make the device enter the working state.

[0048] (2) Input the target pressure value from the display interface of the data processing unit, and the parameter setting range is 80 kPa to 120 kPa.

[0049] (3) The data processing unit's test software makes a pressure determination. If "target pressure value > real-time pressure value" is satisfied, a high-pressure test is carried out; if "target pressure value > real-time pressure value" is not satisfied, a low-pressure test is carried out.

[0050] (4) If a high-pressure test is carried out, open the top plate, open the third solenoid valve and the first solenoid valve, start the vacuum pump, evacuate the inflatable elastomer until it reaches the minimum volume of the inflatable elastomer, close the vacuum pump, the third solenoid valve and the first solenoid valve, seal the top plate with a buckle, open the second solenoid valve, start the air injection pump, open the first solenoid valve after waiting for 15 s, and determine whether the real-time pressure value is equal to the set value ±1.0 kPa. When the real-time pressure value = the set value ±1.0 kPa, the air injection pump stops running, and it is maintained for 1 h, and the test ends; otherwise, the air injection pump continues to work until the real-time pressure value = the set value ±1.0 kPa, and then the air injection pump stops running, and it is maintained for 1 h, and the test ends.

[0051] If a low-pressure test is to be carried out, open the top plate, open the second solenoid valve and the first solenoid valve, start the air injection pump, inject air into the inflatable elastomer until the maximum volume of the inflatable elastomer is reached, close the air injection pump, the second solenoid valve and the first solenoid valve, seal the top plate with a buckle, open the third solenoid valve, start the vacuum pump, open the first solenoid valve after waiting for 15 s, and judge whether the real-time pressure value is equal to the set value ±1.0 kPa. When the real-time pressure value = the set value ±1.0 kPa, the vacuum pump stops running and holds for 1 h, and the test ends; otherwise, the vacuum pump continues to run until the real-time pressure value = the set value ±1.0 kPa, then the air injection pump stops running and holds for 1 h, and the test ends.

[0052] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A pressure adaptability testing device for a refrigerant monitoring system, characterized in that: include: A test chamber, the test chamber is composed of an upper chamber body for placing the test sample and simulating the initial test environment of the test sample, and a lower chamber body for adjusting the pressure change in the test chamber, the upper chamber body and the lower chamber body are connected to each other, and are used to provide the set test conditions for the test sample and perform pressure adaptability test; The air pressure regulating system comprises: an inflatable elastic body and a gas extraction device, wherein the inflatable elastic body is arranged inside the lower bin body, and the gas extraction device penetrates the lower bin body and is connected with the inflatable elastic body through an air pressure regulating main line, and is used to inflate or extract air from the inflatable elastic body; An automatic control system, comprising: a control element and a pressure measuring element, wherein the pressure measuring element, the gas extraction device and the gas extraction device are electrically connected to the control element respectively, the pressure measuring element is arranged on the top of the test chamber, the test end of the pressure measuring element penetrates the test chamber and extends to the interior of the upper chamber body, and is used to measure the real-time pressure in the test chamber, and send the real-time pressure output signal to the control element, and transmit it to the data acquisition and processing system via the control element; after the control element responds to the output signal of the data acquisition and processing system, it executes control on the gas extraction device; A data acquisition and processing system, wherein the data acquisition and processing system is electrically connected to the test sample and the control element, respectively, and is used to acquire, store and display the output signal of the test sample and the output signal of the control element, wherein the output signal of the control element includes the real-time pressure output signal of the pressure measuring element, and the corresponding test conditions are set according to the test process required in the standard, and the output signal of the corresponding test condition is sent to the control element.

2. The pressure adaptability testing device for a refrigerant monitoring system according to claim 1, characterized in that: The test chamber includes: a top plate, a bottom plate and a protective structure, wherein the protective structure is a hollow shell structure with openings at the top and bottom ends, the top plate is movably sealed with the top of the protective structure, the bottom plate is fixedly connected to the bottom of the protective structure, a shelf is fixedly installed inside the protective structure, a through hole is opened on the shelf for placing test samples, an upper chamber body is formed between the top plate, the protective structure and the shelf, and a lower chamber body is formed between the bottom plate, the protective structure and the shelf.

3. The pressure adaptability testing device for a refrigerant monitoring system according to claim 2, characterized in that: The enclosure structure is provided with a sample power supply threading hole and a through-plate joint opening, wherein the sample power supply threading hole is used for passing the power supply and signal lines of the test sample, and the through-plate joint opening is used for passing the air pressure regulating main line connected to the inflatable elastomer, and the top plate is provided with a pressure measuring element interface for passing the test end of the pressure measuring element.

4. The pressure adaptability testing device for a refrigerant monitoring system according to claim 2, characterized in that: A sealing ring is provided between the top plate and the enclosure structure for surrounding the top opening of the enclosure structure. The sealing ring is arranged on the four inner sides of the top opening of the enclosure structure to increase the sealing between the top plate and the enclosure structure. The top plate and the enclosure structure are fixed by a locking member after being covered.

5. The pressure adaptability testing device for a refrigerant monitoring system according to claim 1, characterized in that: The air pressure regulating main line comprises: a gas extraction device, a first solenoid valve and an inflatable elastic body which are connected in sequence and are used to inflate or exhaust the inflatable elastic body.

6. The pressure adaptability testing device for a refrigerant monitoring system according to claim 5, characterized in that: The gas extraction device includes: a first air pressure regulating circuit, a second air pressure regulating circuit, an injection pump, a second solenoid valve, a third solenoid valve and a vacuum pump. The first air pressure regulating circuit includes: an injection pump, a second solenoid valve and an air pressure regulating main line connected in sequence, which are used to inflate the inflatable elastomer through the air pressure regulating main line. The second air pressure regulating circuit includes: a vacuum pump, a third solenoid valve and an air pressure regulating main line connected in sequence, which are used to exhaust air from the inflatable elastomer through the air pressure regulating main line. The first air pressure regulating circuit and the first air pressure regulating circuit are in a parallel relationship. The first solenoid valve, the second solenoid valve, the third solenoid valve, the injection pump and the vacuum pump are electrically connected to the control element respectively, so that the control element controls the first solenoid valve, the second solenoid valve, the third solenoid valve, the injection pump and the vacuum pump after responding to the output signal of the data acquisition and processing system.

7. The pressure adaptability testing device for a refrigerant monitoring system according to claim 1, characterized in that: When the inflatable elastomer is filled with gas, the volume ratio relationship between it and the internal volume of the test chamber is 1:3, which is used to achieve pressure regulation under set test conditions. The pressure regulation range of the set test conditions is 80kPa~120kPa.

8. The pressure adaptability testing device for a refrigerant monitoring system according to claim 7, characterized in that: The inflatable elastic body is made of a material selected from rubber, plastic and latex.

9. The pressure adaptability testing device for a refrigerant monitoring system according to claim 1, characterized in that: The pressure measuring element is a pressure gauge or a pressure transmitter.

10. The pressure adaptability testing device for a refrigerant monitoring system according to claim 1, characterized in that: The data acquisition and processing system includes: a data acquisition device and a data processing unit. The data acquisition device is electrically connected to the test sample, the control element and the data processing unit respectively. The data processing unit is electrically connected to the control element. The data acquisition device is used to collect the output signal of the test sample and the output signal of the control element, and upload them to the data processing unit. The data processing unit receives, stores and displays the output signal of the test sample and the output signal of the control element in real time, sets corresponding test conditions according to the test process required by the UL60335-2-40 standard, and sends the output signal of the corresponding test condition to the control element.

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