Comprehensive testing device of refrigerant monitoring system

Abstract

The invention relates to the technical field of air conditioner safety testing, in particular to a comprehensive testing device of a refrigerant monitoring system, which consists of a gas distribution system, a test sample bin, a test gas bin, a control system and a data acquisition and processing system. According to the invention, gas configuration, filling and switching processes can be automatically completed based on characteristic parameters of a tested sample, test requirements of response time, ignition test, long-term stability, short-term stability and other indexes of a refrigerant monitoring system in national safety standards GB / T4706.32, IEC60335-2-40, UL60335-2-40 and the like can be met, and by combining the design of a safety alarm function, the reliability of the refrigerant monitoring system is improved. The safety design of the device and the safety level requirement of test operation can be ensured, the test result is accurate, and the operation process is safe and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioner safety testing, and in particular to a comprehensive testing device for a refrigerant monitoring system. Background Art

[0002] According to the latest data from Euromonitor International, global sales of R290 air conditioners in 2022 will be approximately 2.8 million units. However, R290 air conditioners are flammable and explosive, have strict system safety protection requirements, low unit volume cooling capacity, large required volume flow, increased compressor displacement, and reduced air conditioning system reliability, which limit their industrial application. On the other hand, as one of the important indicators of a country's scientific and technological development level, sensor technology is increasingly widely used in the field of home appliances. Since the 21st century, my country's sensor manufacturing industry has developed in the direction of intelligence, miniaturization, integration and networking, which has put forward new requirements for the high-quality development of my country's sensor industry. With the introduction of safety and environmental protection policies, the market size and demand for flammable refrigerant sensors have continued to expand, providing new opportunities for the localization of sensors. In addition, domestic and foreign safety standards have special requirements for flammable refrigerant air conditioners, especially for the safety evaluation of refrigerant monitoring systems. The national safety standard GB / T4706.32 is about to be replaced, and the latest version 7.0 of IEC60335-2-40 and the latest version 4.0 of UL60335-2-40 have been released. The three versions of the standard have added technical requirements and test methods related to refrigerant sensors in Appendix LL as an important means to improve product safety. However, the standard does not make clearer instructions on specific test devices, test methods, test process planning, etc. For this reason, this application proposes a comprehensive test device for refrigerant monitoring systems to guide testing laboratories to better implement the standards. Summary of the invention

[0003] Based on this, it is necessary to provide a comprehensive testing device for a refrigerant monitoring system to address the above technical issues, which is used to detect the refrigerant monitoring system in terms of response time, stability, ignition test, etc.

[0004] In order to achieve the above-mentioned purpose, the present application provides a comprehensive test device for a refrigerant monitoring system, which is used to perform stability, response time and ignition test tests on a sample under test, including: a gas distribution system, including: a refrigerant storage tank, a sample injector, a gas analyzer, a gas injection pipeline, a gas analyzer outlet pipeline and a gas analyzer inlet pipeline, the gas injection pipeline includes: a refrigerant storage tank, a sample injector and a test gas bin connected in sequence, which are used to fill the test gas bin with refrigerant, a gas analyzer outlet pipeline and a gas analyzer inlet pipeline are arranged between the gas analyzer and the test gas bin, and a first branch pipeline is arranged between the gas analyzer and the sample injector for testing Measure refrigerant concentration; a test sample bin, comprising: a bin cover and a protective structure, wherein the protective structure is a hollow cylindrical structure with an end opening, and the bin cover and the protective structure are movably sealed to provide an initial test environment for the sample to be tested, wherein the sample to be tested is a refrigerant sensor to be tested, and the sample to be tested is arranged in the test sample bin; a test gas bin, wherein the test sample bin is arranged inside the test gas bin, and is used to provide a test environment for the target gas concentration, wherein a driving device for driving the bin cover to perform vertical lifting and movement is provided in the test gas bin, and when the driving device drives the bin cover to perform vertical lifting and movement, the bin cover just contacts and presses against the end opening of the protective structure A sealed test sample chamber is formed between the chamber cover and the enclosure structure; a control system includes: an air compressor, a control element, a timer, an alarm and a pneumatic pipeline, wherein a pneumatic pipeline is arranged between the air compressor and the driving device, and a solenoid valve is arranged on the pneumatic pipeline. The air compressor, the timer, the solenoid valve, the sample injector and the gas analyzer are electrically connected to the control element respectively, and the timer is electrically connected to the alarm. During the test of stability or response time and ignition test of the tested sample, when the timer reaches the preset test condition, the output signal of the timer is transmitted to the control element and the alarm respectively, and the control element receives the output signal of the timer according to the received signal. Output signal to control the air compressor and the solenoid valve. At the same time, the buzzer emits a prompt sound according to the output signal of the timer, or the control element responds to the output signal of the data acquisition and processing system to control the air compressor, the sample injector and the gas analyzer; the data acquisition and processing system, the data acquisition and processing system is electrically connected to the sample to be tested, the gas analyzer and the control element, respectively, and is used to collect, store and display the output signal of the sample to be tested, the output signal of the gas analyzer and the output signal of the control element, and set the corresponding test conditions according to the test process required by the standard, and send the output signal of the corresponding test condition to the control element.

[0005] Furthermore, the test sample bin comprises: an upper bin cover, a lower bin cover and a protective structure, wherein the protective structure is a hollow cylindrical structure with openings at the top and bottom, and the upper bin cover and the lower bin cover are respectively movably sealed with the protective structure.

[0006] Furthermore, the enclosure structure is provided with a wire threading port, a sample bin test air inlet port and a sample bin test air exhaust port, wherein the wire threading port is used to thread power supply and signal lines of the sample to be tested, the sample bin test air inlet port is connected to an external air supply system for providing clean air through a second branch pipeline, so as to provide clean air for the test sample bin, and the sample bin test air exhaust port is connected to the external atmospheric environment through a third branch pipeline, so as to discharge the air in the test sample bin into the external atmospheric environment.

[0007] Furthermore, sealing ring bodies for surrounding the top opening and the bottom opening of the protective structure are respectively provided between the upper bin cover and the protective structure, and between the lower bin cover and the protective structure. The sealing ring bodies are arranged on the four outer sides of the top opening and the bottom opening of the protective structure, so as to increase the sealing between the upper bin cover and the protective structure, and between the lower bin cover and the protective structure.

[0008] Furthermore, the test gas bin includes: a first test gas bin and a second test gas bin arranged in sequence from top to bottom, and the first test gas bin and the second test gas bin are both hollow cylindrical structures, used to provide test environments with different target gas concentrations respectively, the test sample bin is arranged at the connection between the first test gas bin and the second test gas bin, and the top opening and the bottom opening of the enclosure structure respectively penetrate and extend into the interior of the first test gas bin and the second test gas bin, and the first test gas bin and the second test gas bin are respectively provided with a first driving device for driving the upper bin cover to perform vertical lifting and movement and a second driving device for driving the lower bin cover to perform vertical lifting and movement, as the first driving device drives the upper bin cover to move downward and the second driving device drives the lower bin cover to move upward, the upper bin cover and the lower bin cover will just contact and press against the top opening and the bottom opening of the enclosure structure, so that a sealed test sample bin is formed between the upper bin cover, the lower bin cover and the enclosure structure.

[0009] Furthermore, the gas injection pipeline includes: a first gas injection pipeline and a second gas injection pipeline, the gas analyzer gas outlet pipeline includes: a first gas analyzer gas outlet pipeline and a second gas analyzer gas outlet pipeline, the gas analyzer gas inlet pipeline includes: a first gas analyzer gas inlet pipeline and a second gas analyzer gas inlet pipeline, wherein the first gas injection pipeline includes: a refrigerant storage tank, a sample injection instrument, a first solenoid valve and a first test gas warehouse connected in sequence, for filling the first test gas warehouse with refrigerant, the second gas injection pipeline includes: the refrigerant storage tank, the sample injection instrument, the second solenoid valve and the second test gas warehouse connected in sequence, for filling the second test gas warehouse with refrigerant; the first gas analyzer gas outlet pipeline includes: a gas analyzer, a third solenoid valve and a first test gas warehouse connected in sequence, the second gas analyzer gas outlet pipeline includes: a gas analyzer, a fourth solenoid valve and a second test gas warehouse connected in sequence, the first gas analyzer The air inlet pipeline of the instrument includes: a first test gas bin, a fifth solenoid valve and a gas analyzer connected in sequence; the air inlet pipeline of the second gas analyzer includes: a second test gas bin, a sixth solenoid valve and a gas analyzer connected in sequence, which are used to detect the refrigerant concentration inside the refrigerant storage tank or the first test gas bin or the second test gas bin; the first gas injection pipeline and the second gas injection pipeline, the first gas analyzer outlet pipeline and the second gas analyzer outlet pipeline, and the first gas analyzer air inlet pipeline and the second gas analyzer air inlet pipeline are all in parallel relationship; the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve are electrically connected to the control element respectively, and the control element is used to control the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the sample injector and the gas analyzer after responding to the output signal of the data acquisition and processing system.

[0010] Furthermore, the volume ratio of the test sample chamber to the first test gas chamber and the second test gas chamber is 1 / 50. When the gas in the test sample chamber is mixed with the gas in the first test gas chamber or the second test gas chamber, it is used to ensure that the concentration change of the mixed gas is less than 2%.

[0011] Furthermore, the first driving device includes: a first lifting cylinder and a first piston rod, one end of the first piston rod is connected to the first lifting cylinder, and the other end is connected to the upper bin cover, which is used to drive the upper bin cover to move vertically up and down, and the second driving device includes: a second lifting cylinder and a second piston rod, one end of the second piston rod is connected to the second lifting cylinder, and the other end is connected to the lower bin cover, which is used to drive the lower bin cover to move vertically up and down.

[0012] Furthermore, the pneumatic pipeline includes: a first pneumatic pipeline and a second pneumatic pipeline, wherein the first pneumatic pipeline includes: an air compressor, a seventh solenoid valve and a first lifting cylinder connected in sequence, and the second pneumatic pipeline includes: an air compressor, an eighth solenoid valve and a second lifting cylinder connected in sequence, and the seventh solenoid valve and the eighth solenoid valve are electrically connected to the control element respectively. During the test of stability or response time and ignition test on the sample under test, when the timer reaches the preset test condition, the output signal of the timer is transmitted to the control element and the alarm respectively, and the control element controls the air compressor, the seventh solenoid valve and the eighth solenoid valve according to the received output signal of the timer, and the alarm emits a prompt sound according to the received output signal of the timer.

[0013] Furthermore, 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 sample under test, the gas analyzer, 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 sample under test, the test signal of the gas analyzer, 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 sample under test, the test signal of the gas analyzer, and the output signal of the control element in real time, and sets corresponding test conditions according to the test process required in the standard, and sends the output signal of the corresponding test condition to the control element.

[0014] The advantages and beneficial effects of the present invention are as follows: the present invention provides a comprehensive test device for a refrigerant monitoring system, which can meet the test requirements of the refrigerant monitoring system in terms of response time, ignition test, short-term or long-term stability and other indicators through a high-reliability gas cylinder concentration conversion design, a controllable and high-precision test environment gas concentration design, a high-precision and automated gas distribution system structure design, and a flexible and high-precision control system structure design. Combined with the design of a safety alarm function, the safety design of the device and the safety level requirements of the test operation can be guaranteed. The test results are accurate, the operation process is safe and convenient, and it can fill a major gap in the domestic refrigeration and air-conditioning field for safety testing of refrigerant monitoring systems. The market application prospect is good and it has universal promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a comprehensive testing device for a refrigerant monitoring system provided in Example 1 of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of a comprehensive testing device for a refrigerant monitoring system provided in Embodiment 2 of the present invention.

[0017] Figure 3This is a schematic diagram of the structure of the combination of the test sample chamber and the test gas chamber provided in the third embodiment of the present invention.

[0018] Figure 4 This is a flow chart of the stability testing method provided in Example 4 of the present invention.

[0019] Figure 5 This is a flow chart of the method for response time and ignition test testing provided in Example 5 of the present invention. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] Embodiment 1

[0023] Reference Figure 1 The present application provides a comprehensive test device for a refrigerant monitoring system, which is used to perform short-term or long-term stability tests on the refrigerant monitoring system. The short-term stability and long-term stability of the refrigerant monitoring system both require that the refrigerant monitoring system should respond as expected, according to the provisions of Appendix LL in the above three standards: the refrigerant monitoring system should be exposed to the low-concentration ratio test gas specified in LL.2 for 5 minutes, and the refrigerant monitoring system should not give an output signal during this time; the refrigerant monitoring system should be exposed to the high-concentration ratio test gas specified in LL.2 for 5 minutes, and the refrigerant monitoring system should give an output signal during this time.

[0024] In the present embodiment, a comprehensive test device for a refrigerant monitoring system includes: a refrigerant storage tank 1, a sample injector 2, a gas analyzer 3, a test sample bin 4, an upper bin cover 5, a sample to be tested 6, a power supply and signal line 7, a first test gas bin 8, a first lifting cylinder 9, a second test gas bin 10, a second lifting cylinder 11, a lower bin cover 12, a first pneumatic pipeline 13, a second pneumatic pipeline 14, a control element 15, a timer 16, an alarm 17, an air compressor 18, a data acquisition device 19, a data processing unit 20, a first solenoid valve 101, a second solenoid valve 106, a third solenoid valve 102, a fourth solenoid valve 104, a fifth solenoid valve 103, a sixth solenoid valve 105, a seventh solenoid valve 201, an eighth solenoid valve 202, a first piston rod 111 and a second piston rod 112.

[0025] In this embodiment, see the attached Figure 1 The gas distribution system provided in the present application is provided with two gas injection pipelines, namely a first gas injection pipeline and a second gas injection pipeline, wherein the first gas injection pipeline includes: a refrigerant storage tank 1, a sample injection instrument 2, a first solenoid valve 101 and a first test gas tank 8 connected in sequence, for filling the first test gas tank 8 with refrigerant, and the second gas injection pipeline includes: the refrigerant storage tank 1, the sample injection instrument 2, the second solenoid valve 106 and the second test gas tank 10 connected in sequence, for filling the second test gas tank 10 with refrigerant; and the first gas injection pipeline and the second gas injection pipeline are in parallel.

[0026] In this embodiment, see the attached Figure 1The gas distribution system provided in the present application is provided with two gas analyzer 3 outlet pipelines and two gas analyzer 3 inlet pipelines, wherein the first gas analyzer 3 outlet pipeline includes: a gas analyzer 3, a third solenoid valve 102 and a first test gas bin 8 connected in sequence, the second gas analyzer 3 outlet pipeline includes: a gas analyzer 3, a fourth solenoid valve 104 and a second test gas bin 10 connected in sequence, the first gas analyzer 3 inlet pipeline includes: a first test gas bin 8, a fifth solenoid valve 103 and a gas analyzer 3 connected in sequence, the second gas analyzer 3 inlet pipeline includes: a second test gas bin 10, a sixth solenoid valve 105 and a gas analyzer 3 connected in sequence, the first The outlet pipeline of the gas analyzer 3 and the outlet pipeline of the second gas analyzer 3, as well as the inlet pipeline of the first gas analyzer 3 and the inlet pipeline of the second gas analyzer 3 are all in parallel relationship; at the same time, a first branch pipeline is provided between the gas analyzer 3 and the sample injector 2, and the first branch pipeline is used to detect the refrigerant concentration inside the refrigerant storage tank 1 through real-time measurement, and the outlet pipeline of the first gas analyzer 3 and the inlet pipeline of the first gas analyzer 3 are used to detect the refrigerant concentration inside the first test gas bin 8 through real-time measurement, and the outlet pipeline of the second gas analyzer 3 and the inlet pipeline of the second gas analyzer 3 are used to detect the refrigerant concentration inside the second test gas bin 10 through real-time measurement.

[0027] In this embodiment, see the attached Figure 1 The first test gas chamber 8 provided in the present application is used to provide a test environment of a first target gas concentration, and the second test gas chamber 10 is used to provide a test environment of a second target gas concentration, and the first target gas concentration is higher than the second target gas concentration (the specific values ​​of the first target gas concentration and the second target gas concentration are detailed in Table LL.1 requirements of the above three standard requirements); the test sample chamber 4 is used to place the sample 6 to be tested and provide an initial test environment for the sample 6 to be tested. The test sample chamber 4 is arranged at the connection between the first test gas chamber 8 and the second test gas chamber 10, and the top opening and the bottom opening of the enclosure structure 114 respectively penetrate and extend into the interior of the first test gas chamber 8 and the second test gas chamber 10. A shelf 110 for placing the sample 6 to be tested is also provided in the test sample chamber 4. During the test, the sample 6 to be tested is placed on the shelf 110 and is connected to the power supply and signal receiving port of the data acquisition device 19 through the power supply and signal line 7 of the sample 6 to be tested.

[0028] In this embodiment, see the attached Figure 1The test sample bin 4 provided in the present application is composed of a bin cover, a shelf 110 and a protective structure 114, wherein the bin cover, the shelf 110 and the protective structure 114 can be made of acrylic or stainless steel. At the same time, the bin cover is a movable structure, including an upper bin cover 5 and a lower bin cover 12, and the upper bin cover 5 and the lower bin cover 12 are respectively and movably sealed with the protective structure 114. Among them, in order to ensure the sealing between the upper bin cover 5 and the lower bin cover 12 and the protective structure 114, the present application also provides sealing ring bodies for surrounding the top opening and the bottom opening of the protective structure 114 between the upper bin cover 5 and the protective structure 114 and between the lower bin cover 12 and the protective structure 114, respectively, and by adding sealing ring bodies on the four outer sides of the top opening and the bottom opening of the protective structure 114, the sealing between the upper bin cover 5 or the lower bin cover 12 and the protective structure 114 is increased.

[0029] In this embodiment, see the attached Figure 1 The first test gas chamber 8 and the second test gas chamber 10 provided in the present application are respectively provided with a first driving device for driving the upper chamber cover 5 to perform vertical lifting and movement, and a second driving device for driving the lower chamber cover 12 to perform vertical lifting and movement, so that the upper chamber cover 5 is driven downward by the first driving device and the lower chamber cover 12 is driven upward by the second driving device, and the upper chamber cover 5 and the lower chamber cover 12 just contact and press against the top opening and the bottom opening of the enclosure structure 114, so that a sealed test sample chamber 4 is formed between the upper chamber cover 5, the lower chamber cover 12 and the enclosure structure 114. The first driving device includes: a first lifting cylinder 9 and a first piston rod 111, one end of the first piston rod 111 is connected to the first lifting cylinder 9, and the other end is connected to the upper bin cover 5, which is used to drive the upper bin cover 5 to move vertically up and down, and the second driving device includes: a second lifting cylinder 11 and a second piston rod 112, one end of the second piston rod 112 is connected to the second lifting cylinder 11, and the other end is connected to the lower bin cover 12, which is used to drive the lower bin cover 12 to move vertically up and down. During the installation process, the first lifting cylinder 9 is installed on the inner side of the upper end cover of the first test gas bin 8, and is connected to the upper bin cover 5 of the test sample bin 4 through the first piston rod 111, and the second lifting cylinder 11 is installed on the inner side of the lower end cover of the second test gas bin 10, and is connected to the lower bin cover 12 of the test sample bin 4 through the second piston rod 112.

[0030] In this embodiment, in order to ensure that the concentration of the test gas during the test process meets the requirements of the standard, the volume ratio of the test sample chamber 4 to the first test gas chamber 8 is 1 / 50, and the volume ratio of the test sample chamber 4 to the second test gas chamber 10 is 1 / 50. When the gas in the test sample chamber 4 is mixed with the gas in the first test gas chamber 8 or the second test gas chamber 10, it can be ensured that the concentration change of the mixed gas is less than 2%.

[0031] In this embodiment, see the attached Figure 1 The control system provided in the present application is composed of an air compressor 18, a seventh solenoid valve 201, an eighth solenoid valve 202, a control element 15, a timer 16, and an alarm 17. The control system is connected in the following manner: the air compressor 18 is provided with two pneumatic pipelines, namely a first pneumatic pipeline 13 and a second pneumatic pipeline 14, wherein the first pneumatic pipeline 13 includes: the air compressor 18, the seventh solenoid valve 201 and the first lifting cylinder 9 connected in sequence, and the second pneumatic pipeline 14 includes: the air compressor 18, the eighth solenoid valve 202 and the second lifting cylinder 11 connected in sequence; further, the control system is also provided with two control loops, namely a first control loop and a second control loop, wherein, in In the first control loop, the control element 15 is electrically connected to the seventh solenoid valve 201 through an electrical circuit, and in the second control loop, the control element 15 is electrically connected to the eighth solenoid valve 202 through an electrical circuit; the control element 15 is electrically connected to the timer 16, and when the timer 16 counts to the test condition (such as 5 minutes), the signal is output to the control element 15, and the execution of the control element 15 controls the seventh solenoid valve 201 or the eighth solenoid valve 202; the timer 16 is electrically connected to the buzzer 17, and when the timer 16 counts to the test condition (such as 5 minutes), the signal is output to the buzzer 17, and the buzzer 17 emits a prompt sound, indicating that the current test stage is completed. Further, the control element 15 includes but is not limited to a control button, a PLC controller, etc.

[0032] In this embodiment, see the attached Figure 1 The data acquisition and processing system provided in the present application is composed of a data acquisition device 19 and a data processing unit 20. The data acquisition device 19 includes but is not limited to collecting the output signal of the sample 6, the test signal of the gas analyzer 3 and the output signal of the control element 15, and uploading them to the data processing unit 20; further, the data processing unit 20 is a test software, which can be developed by including but not limited to C#, VB, Labview, Python, etc.; the data processing unit 20 reads the data uploaded by the data acquisition device 19 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 20 according to the test process required by the standard, and send the output signal of the corresponding test condition to the control element 15, so that the control element 15 can execute the control of the first solenoid valve 101, the second solenoid valve 106, the third solenoid valve 102, the fourth solenoid valve 104, the fifth solenoid valve 103, the sixth solenoid valve 105, the seventh solenoid valve 201, the eighth solenoid valve 202, the sample injector 2, the gas analyzer 3 and the air compressor 18 after responding to the output signal of the data acquisition and processing system.

[0033] Embodiment 2

[0034] Reference Figure 2The present application provides a comprehensive test device for a refrigerant monitoring system, which is used to perform response time and ignition test tests on the refrigerant monitoring system, in accordance with the provisions of Appendix LL in the above three standards: within 5 seconds, the refrigerant sensor is exposed to an environment where the gas volume ratio changes stepwise from clean air to the test gas specified in LL.2. The response time test requirement is: 25% LFL of the refrigerant, and the ignition test test requirement is: (110±0.5)% of the chemical equivalent concentration of the refrigerant.

[0035] Reference Figure 2 Compared with the first embodiment, the comprehensive testing device in this embodiment is a simplified structural form, including: a refrigerant storage tank 1, a sample injector 2, a gas analyzer 3, a test sample bin 4, a first test gas bin 8, a first lifting cylinder 9, a seventh solenoid valve 201, a control element 15, a timer 16, an alarm 17, an air compressor 18, a data acquisition device 19 and a data processing unit 20.

[0036] In this embodiment, see the attached Figure 2 The gas distribution system provided in the present application is connected in the following manner: the gas injection pipeline includes: a refrigerant storage tank 1, a sample injector 2 and a test gas bin 3 connected in sequence, which are used to fill the first test gas bin 8 with refrigerant, and a gas analyzer 3 outlet pipeline and a gas analyzer 3 inlet pipeline are set between the gas analyzer 3 and the first test gas bin 8. The real-time measurement of the gas analyzer 3 outlet pipeline and the gas analyzer 3 inlet pipeline is used to detect the refrigerant concentration inside the first test gas bin 8. At the same time, a first branch pipeline is set between the gas analyzer 3 and the sample injector 2, which is used to detect the refrigerant concentration inside the refrigerant storage tank 1.

[0037] In this embodiment, see the attached Figure 2 The first test gas chamber 8 is used to provide a test environment for the target gas concentration, and the test sample chamber 4 is used to place the test sample 6. During the test, the test sample 6 is placed at the bottom of the test sample chamber 4 and is connected to the power supply and signal receiving port of the data acquisition device 19 through the power supply and signal line 7 of the test sample 6.

[0038] In this embodiment, see the attached Figure 2 The test sample bin 4 provided by the present application is composed of a movable upper bin cover 5 and a protective structure 114, wherein both the upper bin cover 5 and the protective structure 114 can be made of acrylic or stainless steel. At the same time, the upper bin cover 5 and the protective structure 114 are movably sealed and matched. In order to ensure the sealing between the upper bin cover 5 and the protective structure 114, the present application further provides a sealing ring body for surrounding the top opening of the protective structure 114 between the upper bin cover 5 and the protective structure 114. By adding sealing ring bodies on the four outer sides of the top opening of the protective structure 114, the sealing between the upper bin cover 5 and the protective structure 114 is increased.

[0039] In this embodiment, see the attached Figure 2 A first driving device is provided in the first test gas bin 8, wherein the first driving device includes: a first lifting cylinder 9 and a first piston rod 111, one end of the first piston rod 111 is connected to the first lifting cylinder 9, and the other end is connected to the upper bin cover 5, for driving the upper bin cover 5 to perform vertical lifting and movement.

[0040] In this embodiment, in order to ensure that the concentration of the test gas during the test process meets the requirements of the standard, the volume ratio of the test sample chamber 4 and the first test gas chamber 8 is 1 / 50. When the gas in the test sample chamber 4 is mixed with the gas in the first test gas chamber 8, the concentration change of the mixed gas can be ensured to be less than 2%.

[0041] In this embodiment, see the attached Figure 2 The control system provided in the present application is composed of an air compressor 18, a seventh solenoid valve 201, a control element 15, a timer 16, and an alarm 17. The control system is connected in the following manner: the air compressor 18 is provided with a pneumatic pipeline, which includes: the air compressor 18, the seventh solenoid valve 201 and the first lifting cylinder 9 connected in sequence; further, the control system is also provided with a control loop, in which the control element 15 is electrically connected to the seventh solenoid valve 201 through an electrical circuit, and the control element 15 is electrically connected to the timer 16. When the timer 16 counts to a test condition (such as 30s), a signal is output to the control element 15, and the control element 15 executes control of the seventh solenoid valve 201; the timer 16 is electrically connected to the alarm 17. When the timer 16 counts to a test condition (such as 30s), a signal is output to the alarm 17, and the alarm 17 emits a prompt sound, indicating that the current test phase is completed. Further, the control element 15 includes but is not limited to a control button, a PLC controller, etc.

[0042] In this embodiment, see the attached Figure 2, the data acquisition and processing system provided in this application is composed of a data acquisition device 19 and a data processing unit 20. The data acquisition device 19 includes but is not limited to collecting the output signal of the sample 6 under test, the test signal of the gas analyzer 3 and the output signal of the control element 15, and uploading them to the data processing unit 20; further, the data processing unit 20 is a test software, which can be developed by but is not limited to C#, VB, Labview, Python, etc.; the data processing unit 20 reads the data uploaded by the data acquisition device 19 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 20 according to the test process required in the standard, and send the output signal of the corresponding test condition to the control element 15, so that the control element 15 executes the control of the seventh solenoid valve 201, the sample injector 2, the gas analyzer 3 and the air compressor 18 after responding to the output signal of the data acquisition and processing system.

[0043] Embodiment 3

[0044] Reference Figure 3 This embodiment provides a combination structure of a test sample bin 4 and a test gas bin, which is composed of a test sample bin 4, a first test gas bin 8, a first lifting cylinder 9, a second test gas bin 10, a second lifting cylinder 11, and a bracket 21, and can be used for the comprehensive testing device of the refrigerant monitoring system of embodiment one.

[0045] In this embodiment, refer to the attached Figure 3 The first test gas chamber 8 is a cavity structure composed of an upper end cover 115, a first enclosure component 117 and a middle partition 113, and the second test gas chamber 10 is a cavity structure composed of a lower cover 116, a second enclosure component 118 and a middle partition 113. Among them, the first test gas chamber 8 and the second test gas chamber 10 share the middle partition 113, and the test sample chamber 4 is installed in the center of the middle partition 114, and the separation and sealing of the connection can be ensured by sealant and sealing rings. Furthermore, the upper end cover 115, the first enclosure component 117, the middle partition 113, the lower cover 116, and the second enclosure component 118 can all be made of acrylic or stainless steel. Furthermore, the first enclosure assembly 117 of the first test gas bin 8 and the second enclosure assembly 118 of the second test gas bin 10 can be an integrated structure or a split structure. If it is a split structure, it can be fixed by a connection form including but not limited to flanges, and can be sealed by including but not limited to sealants and gaskets to ensure the airtightness of the split structure. Furthermore, a bracket 21 is provided at the bottom of the second test gas bin 10 to support the test gas bin.

[0046] In this embodiment, refer to the attached Figure 3The test sample bin 4 is composed of an upper bin cover 5, a lower bin cover 12, a shelf 110 and a protective structure 114, wherein the upper bin cover 5, the lower bin cover 12, the shelf 110 and the protective structure 114 can be made of acrylic or stainless steel. In order to ensure the sealing between the upper bin cover 5, the lower bin cover 12 and the protective structure 114, respectively, the present application further provides sealing ring bodies for surrounding the top opening and the bottom opening of the protective structure 114 between the upper bin cover 5 and the protective structure 114 and between the lower bin cover 12 and the protective structure 114, respectively. By adding sealing ring bodies on the four outer sides of the top opening and the bottom opening of the protective structure 114, the sealing between the upper bin cover 5 or the lower bin cover 12 and the protective structure 114 is increased.

[0047] In this embodiment, see the attached Figure 3 The first test gas bin 8 and the second test gas bin 10 provided in the present application are respectively provided with a first driving device for driving the upper bin cover 5 to move vertically up and down and a second driving device for driving the lower bin cover 12 to move vertically up and down, wherein the first driving device comprises: a first lifting cylinder 9 and a first piston rod 111, one end of the first piston rod 111 is connected to the first lifting cylinder 9, and the other end is connected to the upper bin cover 5, and is used to drive the upper bin cover 5 to move vertically up and down, and the second driving device comprises: a second lifting cylinder 11 and a second piston rod 112, one end of the second piston rod 112 is connected to the second lifting cylinder 11, and the other end is connected to the lower bin cover 12, and is used to drive the lower bin cover 12 to move vertically up and down. During the installation process, the first lifting cylinder 9 is installed on the inner side of the upper end cover of the first test gas bin 8, and is connected to the upper bin cover 5 of the test sample bin 4 through the first piston rod 111, and the second lifting cylinder 11 is installed on the inner side of the lower end cover of the second test gas bin 10, and is connected to the lower bin cover 12 of the test sample bin 4 through the second piston rod 112.

[0048] In this embodiment, a plurality of holes are opened on the enclosure structure 114 of the test sample chamber 4, including but not limited to a wire threading port 301, a sample chamber test air inlet port 302, and a sample chamber test air exhaust port 303; wherein the wire threading port 301 is used to thread the power supply and signal lines of the sample to be tested 6, the sample chamber test air inlet port 302 is connected to an external air supply system for providing clean air through a second branch line, and is used to provide clean air for the test sample chamber 4, and the sample chamber test air exhaust port 303 is connected to the external atmospheric environment through a third branch line (it can also be connected to the input end of the circulating fan to improve the exhaust efficiency), and is used to discharge the air in the test sample chamber 4 into the external atmospheric environment.

[0049] In this embodiment, refer to the attached Figure 3The first enclosure component 117 is provided with a plurality of holes, including but not limited to a first test gas inlet 304, a first gas bin analyzer inlet 305, a first gas bin analyzer outlet 306, a first gas bin air inlet 307, a first gas bin air outlet 308, a sample bin air inlet 309, and a sample bin air outlet 310; wherein the first test gas inlet 304 is connected to one end of the first gas injection pipeline, the first gas bin analyzer inlet 305 is connected to one end of the first gas analyzer 3 inlet pipeline, and the first gas bin analyzer outlet 306 is connected to one end of the first gas analyzer 3 inlet pipeline. Connected to one end of the outlet pipeline of the first gas analyzer 3, the first gas bin air inlet 307 is connected to the external air supply system through the fourth branch pipeline, and is used to provide clean air for the first test gas bin 8. The first gas bin air outlet 308 is connected to the external atmospheric environment through the fifth branch pipeline (it can also be connected to the input end of the circulating fan to improve the exhaust efficiency), and is used to discharge the air in the first test gas bin 8 to the external atmospheric environment. The sample bin air inlet 309 is used for the penetration of the second branch pipeline, and the sample bin air outlet 310 is used for the penetration of the third branch pipeline.

[0050] In this embodiment, refer to the attached Figure 3 The second enclosure assembly 118 is provided with a number of holes, including but not limited to a second test gas inlet 311, a second gas bin analyzer inlet 312, a second gas bin analyzer outlet 313, a second gas bin air inlet 314, and a second gas bin air outlet 315; wherein, the second test gas inlet 311 is connected to one end of the second gas injection pipeline, the second gas bin analyzer inlet 312 is connected to one end of the second gas analyzer 3 inlet pipeline, the second gas bin analyzer outlet 313 is connected to one end of the second gas analyzer 3 outlet pipeline, the second gas bin air inlet 314 is connected to the external air supply system through the sixth branch pipeline, which is used to provide clean air for the second test gas bin 10, and the second gas bin air outlet 315 is connected to the external atmospheric environment through the seventh branch pipeline (it can also be connected to the input end of the circulating fan to improve the exhaust efficiency), which is used to discharge the air in the second test gas bin 10 into the external atmospheric environment.

[0051] In this embodiment, refer to the attached Figure 3 The middle partition 113 is provided with a number of holes, including but not limited to the air pipe joint 316 of the first lifting cylinder 9; the lower cover plate 116 is provided with a number of holes, including but not limited to the pressure relief port 318 and the air pipe joint 319 of the second lifting cylinder 11; wherein, the air pipe joint 316 of the first lifting cylinder 9 is connected to one end of the first pneumatic pipeline 13, and the air pipe joint 319 of the second lifting cylinder 11 is connected to one end of the second pneumatic pipeline 14, and the pressure relief port 318 is used to prevent the internal pressure from being too high to damage the tank body.

[0052] Embodiment 4

[0053] Reference Figure 4 , the comprehensive testing device of Example 1 is used to perform stability test on the refrigerant monitoring system, and the specific testing method includes the following steps.

[0054] S101. Sample preparation: Place the sample to be tested on a shelf in the test sample compartment, and connect the power supply and signal lines of the sample to be tested to the power supply and signal receiving ports of the data logger.

[0055] S102, test preparation: power on the integrated test device, set corresponding test conditions according to the stability test process required by the standard, and send the output signal of the corresponding test condition to the control element. The control element responds to the output signal of the data processing unit, first introduces clean air into the test sample chamber, and then controls the first drive device to drive the upper chamber cover to move downward and the second drive device to drive the lower chamber cover to move upward, so that a sealed test sample chamber is formed between the upper chamber cover, the lower chamber cover and the enclosure structure, and the test sample chamber provides an initial test environment for the sample to be tested.

[0056] S103. Gas configuration of the first test gas bin: open the first solenoid valve, the third solenoid valve and the fifth solenoid valve, and at the same time, open the refrigerant storage tank, fill the refrigerant into the first test gas bin through the sample injector, and start the gas analyzer to synchronously analyze the gas concentration of the test environment in the first test gas bin, and use the real-time measurement of the first gas analyzer outlet pipeline and the first gas analyzer inlet pipeline to ensure the uniformity of the gas concentration in the first test gas bin. When the gas concentration in the first test gas bin reaches the first target gas concentration, close the refrigerant storage tank, the sample injector, the gas analyzer, the first solenoid valve, the third solenoid valve and the fifth solenoid valve.

[0057] S104, gas configuration of the second test gas bin: open the second solenoid valve, the fourth solenoid valve and the sixth solenoid valve, and at the same time, open the refrigerant storage tank, fill the refrigerant into the second test gas bin through the sample injector, and start the gas analyzer to synchronously analyze the gas concentration of the test environment in the second test gas bin, and use the real-time measurement of the second gas analyzer outlet pipeline and the second gas analyzer inlet pipeline to ensure the uniformity of the gas concentration in the second test gas bin. When the gas concentration in the second test gas bin reaches the second target gas concentration, close the refrigerant storage tank, the sample injector, the gas analyzer, the second solenoid valve, the fourth solenoid valve and the sixth solenoid valve; wherein the first target gas concentration is higher than the second target gas concentration.

[0058] S105. First test gas chamber exposure test: open the seventh solenoid valve, drive the upper chamber cover to move upwards through the first driving device, open the upper chamber cover of the test sample chamber, and mix the gas in the test sample chamber with the gas in the first test gas chamber through the principle of gas diffusion. The concentration change of the mixed gas is less than 2%. After the tested sample is exposed to this condition for 5 minutes, close the seventh solenoid valve. At the same time, drive the upper chamber cover to move downwards through the first driving device, close the upper chamber cover of the test sample chamber, and collect the output signal of the tested sample through the data acquisition device, and upload it to the data processing unit. The data processing unit receives, stores and displays the output signal of the tested sample.

[0059] S106. Second test gas chamber exposure test: open the eighth solenoid valve, drive the lower chamber cover to move downward through the second driving device, open the lower chamber cover of the test sample chamber, and mix the gas in the test sample chamber with the gas in the second test gas chamber through the principle of gas diffusion. The concentration change of the mixed gas is less than 2%. After the tested sample is exposed to this condition for 5 minutes, close the eighth solenoid valve. At the same time, drive the lower chamber cover to move upward through the second driving device, close the lower chamber cover of the test sample chamber, and collect the output signal of the tested sample through the data acquisition device, and upload it to the data processing unit. The data processing unit receives, stores and displays the output signal of the tested sample.

[0060] S107, repeat the operations of S103 to S106 twice in sequence to obtain the stability test result of the tested sample.

[0061] Embodiment 5

[0062] Reference Figure 5 The comprehensive testing device of the second embodiment is used to perform response time and ignition test on the refrigerant monitoring system. The specific testing method includes the following steps.

[0063] S201, sample preparation: place the sample to be tested on the shelf in the test sample compartment, and connect the power supply and signal lines of the sample to be tested to the power supply and signal receiving ports of the data logger.

[0064] S202, test preparation: power on the integrated test device, set corresponding test conditions according to the response time and ignition test process required by the standard, and send the output signal of the corresponding test condition to the control element. The control element responds to the output signal of the data processing unit, firstly introduces clean air into the test sample chamber, and then controls the first drive device to drive the upper chamber cover to move downward, so that a sealed test sample chamber is formed between the upper chamber cover and the surrounding structure, and the test sample chamber provides an initial test environment for the sample to be tested.

[0065] S203. Gas configuration of the first test gas bin: open the first solenoid valve, the third solenoid valve and the fifth solenoid valve, and at the same time, open the refrigerant storage tank, fill the refrigerant into the first test gas bin through the sample injector, and start the gas analyzer to synchronously analyze the gas concentration of the test environment in the first test gas bin, and use the real-time measurement of the first gas analyzer outlet pipeline and the first gas analyzer inlet pipeline to ensure the uniformity of the gas concentration in the first test gas bin. When the gas concentration in the first test gas bin reaches the first target gas concentration (the response time test requirement is: 25% of the refrigerant LFL; the test requirement of the ignition test is: refrigerant chemical equivalent concentration (110±0.5)%), the sample injector automatically stops filling the refrigerant.

[0066] S204. Exposure test of the first test gas chamber: open the seventh solenoid valve, drive the upper chamber cover to move upward through the first driving device, open the upper chamber cover of the test sample chamber, and mix the gas in the test sample chamber with the gas in the first test gas chamber through the principle of gas diffusion. The concentration change of the mixed gas is less than 2%. The response time test requirement is: the tested sample is exposed to this condition for 30 seconds, and the output signal of the tested sample is collected by the data acquisition device and uploaded to the data processing unit. The data processing unit receives, stores and displays the output signal of the tested sample. The refrigerant monitoring system needs to send an output signal within 30 seconds, otherwise the test fails. The ignition time test requirement is: the tested sample is exposed to this condition for 5 minutes, and no explosion or combustion should occur.

[0067] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A comprehensive testing device for a refrigerant monitoring system, characterized in that: The device is used to perform stability, response time and ignition test tests on the sample under test, including: A gas distribution system, comprising: a refrigerant storage tank, a sample injector, a gas analyzer, a gas injection pipeline, a gas analyzer outlet pipeline and a gas analyzer inlet pipeline, wherein the gas injection pipeline comprises: a refrigerant storage tank, a sample injector and a test gas bin connected in sequence, for filling the test gas bin with refrigerant, a gas analyzer outlet pipeline and a gas analyzer inlet pipeline are arranged between the gas analyzer and the test gas bin, and a first branch pipeline is arranged between the gas analyzer and the sample injector, for detecting the refrigerant concentration; The test sample bin comprises: a bin cover and a protective structure, wherein the protective structure is a hollow cylindrical structure with an end opening, and the bin cover and the protective structure are movably sealed and matched to provide an initial test environment for the tested sample, wherein the tested sample is a refrigerant sensor to be tested, and the tested sample is arranged in the test sample bin; A test gas chamber, wherein the test sample chamber is arranged inside the test gas chamber, and is used to provide a test environment of the target gas concentration. A driving device is provided inside the test gas chamber, and is used to drive the chamber cover to move vertically up and down. When the driving device drives the upper chamber cover to move vertically up and down, the chamber cover just contacts and presses against the end opening of the enclosure structure, so that a sealed test sample chamber is formed between the chamber cover and the enclosure structure; A control system, comprising: an air compressor, a control element, a timer, an alarm and a pneumatic pipeline, wherein a pneumatic pipeline is arranged between the air compressor and a driving device, and a solenoid valve is arranged on the pneumatic pipeline, and the air compressor, the timer, the solenoid valve, the sample injector and the gas analyzer are electrically connected to the control element respectively, and the timer is electrically connected to the alarm, and during the test process of stability or response time and ignition test of the tested sample, when the timer reaches the preset test condition, the output signal of the timer is transmitted to the control element and the alarm respectively, and the control element controls the air compressor and the solenoid valve according to the received output signal of the timer, and at the same time, the alarm emits a prompt sound according to the received output signal of the timer, or the control element controls the air compressor, the sample injector and the gas analyzer after responding to the output signal of the data acquisition and processing system; The data acquisition and processing system is electrically connected to the sample under test, the gas analyzer, and the control element, respectively, and is used to collect, store and display the output signal of the sample under test, the output signal of the gas analyzer and the output signal of the control element, and set the corresponding test conditions according to the test process required by the standard, and send the output signal of the corresponding test condition to the control element.

2. The comprehensive testing device for a refrigerant monitoring system according to claim 1, characterized in that: The test sample bin comprises: an upper bin cover, a lower bin cover and a protective structure. The protective structure is a hollow cylindrical structure with openings at the top and bottom ends. The upper bin cover and the lower bin cover are respectively movably sealed with the protective structure.

3. The comprehensive testing device for a refrigerant monitoring system according to claim 1, characterized in that: The enclosure structure is provided with a wire threading port, a sample bin test air inlet port and a sample bin test air exhaust port, wherein the wire threading port is used to thread the power supply and signal lines of the sample to be tested, the sample bin test air inlet port is connected to an external air supply system for providing clean air through a second branch pipeline, and is used to provide clean air for the test sample bin, and the sample bin test air exhaust port is connected to the external atmospheric environment through a third branch pipeline, and is used to discharge the air in the test sample bin into the external atmospheric environment.

4. The comprehensive testing device for a refrigerant monitoring system according to claim 2, characterized in that: Sealing ring bodies for surrounding the top opening and the bottom opening of the protective structure are respectively provided between the upper bin cover and the protective structure, and between the lower bin cover and the protective structure. The sealing ring bodies are arranged on the four outer sides of the top opening and the bottom opening of the protective structure, and are used to increase the sealing between the upper bin cover and the protective structure, and between the lower bin cover and the protective structure.

5. The comprehensive testing device for a refrigerant monitoring system according to claim 2, characterized in that: The test gas bin includes: a first test gas bin and a second test gas bin arranged in sequence from top to bottom, and the first test gas bin and the second test gas bin are both hollow cylindrical structures, which are used to provide test environments with different target gas concentrations respectively. The test sample bin is arranged at the connection between the first test gas bin and the second test gas bin, and the top opening and the bottom opening of the enclosure structure respectively penetrate and extend into the interior of the first test gas bin and the second test gas bin. The first test gas bin and the second test gas bin are respectively provided with a first driving device for driving the upper bin cover to perform vertical lifting and a second driving device for driving the lower bin cover to perform vertical lifting and movement. As the first driving device drives the upper bin cover to move downward and the second driving device drives the lower bin cover to move upward, the upper bin cover and the lower bin cover will just contact and press against the top opening and the bottom opening of the enclosure structure, so that a sealed test sample bin is formed between the upper bin cover, the lower bin cover and the enclosure structure.

6. The comprehensive testing device for a refrigerant monitoring system according to claim 5, characterized in that: The gas injection pipeline includes: a first gas injection pipeline and a second gas injection pipeline, the gas analyzer gas outlet pipeline includes: a first gas analyzer gas outlet pipeline and a second gas analyzer gas outlet pipeline, the gas analyzer gas inlet pipeline includes: a first gas analyzer gas inlet pipeline and a second gas analyzer gas inlet pipeline, wherein the first gas injection pipeline includes: a refrigerant storage tank, a sample injection instrument, a first solenoid valve and a first test gas warehouse connected in sequence, for filling the first test gas warehouse with refrigerant, the second gas injection pipeline includes: the refrigerant storage tank, the sample injection instrument, the second solenoid valve and the second test gas warehouse connected in sequence, for filling the second test gas warehouse with refrigerant; the first gas analyzer gas outlet pipeline includes: a gas analyzer, a third solenoid valve and a first test gas warehouse connected in sequence, the second gas analyzer gas outlet pipeline includes: a gas analyzer, a fourth solenoid valve and a second test gas warehouse connected in sequence, the first gas analyzer inlet The gas pipeline includes: a first test gas tank, a fifth solenoid valve and a gas analyzer connected in sequence; the second gas analyzer air inlet pipeline includes: a second test gas tank, a sixth solenoid valve and a gas analyzer connected in sequence, which are used to detect the refrigerant concentration inside the refrigerant storage tank or the first test gas tank or the second test gas tank; the first gas injection pipeline and the second gas injection pipeline, the first gas analyzer air outlet pipeline and the second gas analyzer air outlet pipeline, and the first gas analyzer air inlet pipeline and the second gas analyzer air inlet pipeline are all in parallel relationship; the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve are electrically connected to the control element respectively, and the control element is used to control the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the sample injector and the gas analyzer after responding to the output signal of the data acquisition and processing system.

7. The comprehensive testing device for a refrigerant monitoring system according to claim 5, characterized in that: The volume ratio of the test sample chamber to the first test gas chamber and the second test gas chamber is 1 / 50. When the gas in the test sample chamber is mixed with the gas in the first test gas chamber or the second test gas chamber, it is used to ensure that the concentration change of the mixed gas is less than 2%.

8. The comprehensive testing device for a refrigerant monitoring system according to claim 5, characterized in that: The first driving device includes: a first lifting cylinder and a first piston rod, one end of the first piston rod is connected to the first lifting cylinder, and the other end is connected to the upper bin cover, which is used to drive the upper bin cover to move vertically up and down, and the second driving device includes: a second lifting cylinder and a second piston rod, one end of the second piston rod is connected to the second lifting cylinder, and the other end is connected to the lower bin cover, which is used to drive the lower bin cover to move vertically up and down.

9. The comprehensive testing device for a refrigerant monitoring system according to claim 8, characterized in that: The pneumatic pipeline includes: a first pneumatic pipeline and a second pneumatic pipeline, wherein the first pneumatic pipeline includes: an air compressor, a seventh solenoid valve and a first lifting cylinder connected in sequence, and the second pneumatic pipeline includes: an air compressor, an eighth solenoid valve and a second lifting cylinder connected in sequence, and the seventh solenoid valve and the eighth solenoid valve are electrically connected to the control element respectively. During the test of stability or response time and ignition test on the sample under test, when the timer reaches the preset test condition, the output signal of the timer is transmitted to the control element and the buzzer respectively, and the control element controls the air compressor, the seventh solenoid valve and the eighth solenoid valve according to the received output signal of the timer, and the buzzer emits a prompt sound according to the received output signal of the timer.

10. The comprehensive 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 sample to be tested, the gas analyzer, 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 sample to be tested, the test signal of the gas analyzer, 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 sample to be tested, the test signal of the gas analyzer, and the output signal of the control element in real time, and sets corresponding test conditions according to the test process required in the standard, and sends the output signal of the corresponding test condition to the control element.

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