Simulation air compressor high altitude test device and test method thereof

Abstract

The invention relates to the technical field of high-altitude testing, and discloses a simulated air compressor high-altitude testing device and method, and the device comprises a testing system which comprises a fan and is used for simulating the air pressure and flow under different altitude conditions, and transmitting simulated environment air to a to-be-tested air compressor; the heat management system comprises a main circulating water pump, an expansion water tank and an auxiliary circulating water pump and is used for adjusting the temperature of air entering the air compressor and ensuring that the air compressor works within a set temperature range; and the acquisition control system comprises an air flow meter and is used for acquiring air flow, temperature and pressure data in the testing process of the air compressor in real time and transmitting the data to the main control computer for analysis and processing. The working environment of the air compressor under the high-altitude condition is simulated through the device, the device does not need to depend on an expensive and time-consuming traditional environment chamber test method, and the performance test of the air compressor under the air pressure and temperature conditions of different altitudes can be completed in a short time.

Description

Technical Field

[0001] The present invention relates to the technical field of high altitude testing, and in particular to a high altitude testing device and a testing method for a simulated air compressor. Background Art

[0002] The hydrogen fuel cell system is a highly efficient energy conversion device. It directly converts hydrogen and oxygen into electrical energy through electrochemical reactions, thus avoiding heat energy loss and improving energy utilization. It also has the advantages of zero emissions and low noise.

[0003] The hydrogen fuel cell system consists of a fuel cell stack, a gas supply system, a thermal management system, and a control system. The gas supply system includes a hydrogen system and an air system. The system hydrogen is supplied to the fuel cell stack from a hydrogen storage bottle through the hydrogen system, and the oxygen comes from the air, which is supplied to the fuel cell stack through the air system. As a key component of the air system, the air compressor compresses the atmosphere to a suitable pressure and delivers it to the fuel cell stack at a suitable flow rate. It is an indispensable device in the fuel cell system.

[0004] Since vehicles using fuel cell systems as power units are in a dynamic operation process, the environment in which the vehicles are located will change at any time. Changes in altitude will cause huge changes in the oxygen content in the atmosphere, seriously affecting the performance of the fuel cell system. This requires the air compressor to have a stronger ability to transport more atmosphere into the stack to participate in the reaction. How to efficiently and low-costly obtain the performance map of the air compressor at different altitudes is crucial. For testing the high-altitude performance of air compressors, the more common method is to test in an environmental chamber, by changing the pressure and temperature in the environmental chamber, thereby simulating the operation of the air compressor at different altitudes. However, environmental chamber testing is expensive and it takes a long time to reach the target temperature and pressure. Improvements to the high-altitude testing of air compressors are needed.

[0005] Chinese patent CN117489579A discloses a fuel cell air compressor test and control method that simulates high-altitude and low-pressure working conditions. The scheme is to draw a certain vacuum into the test circuit through a vacuum pump, and use a pressure-stabilizing box to stabilize the system pressure, so as to simulate the high-altitude and low-pressure environment, and then test the performance of the air compressor. The structure of the invention is designed with a thermal management system, which cannot manage the heat dissipation of the air compressor and may damage the air compressor; the test system has no data acquisition function and cannot perform a comprehensive and effective analysis of the tested air compressor; the control scheme does not involve a fault diagnosis scheme. If a system fault is not discovered in time during the test, it may cause great losses and consequences. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a simulated high-altitude test device for an air compressor and a test method thereof, which solves the problems that most thermal management systems are unable to perform heat dissipation management on the air compressor, which may cause damage to the air compressor; and the test system has no data acquisition function and is unable to perform a comprehensive and effective analysis of the tested air compressor.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-altitude test device and a test method for simulating an air compressor, comprising:

[0008] The test system includes a fan for simulating air pressure and flow at different altitudes and delivering simulated ambient air to the air compressor to be tested;

[0009] Thermal management system, including main circulating water pump, expansion water tank and auxiliary circulating water pump, is used to adjust the temperature of air entering the air compressor to ensure that the air compressor works within the set temperature range;

[0010] The acquisition control system, including an air flow meter, is used to collect air flow, temperature and pressure data in real time during the air compressor test process, and transmit the data to the main control computer for analysis and processing;

[0011] The fan is connected to the air filter through a pipeline, the air filter is connected to the air intake pressure stabilizing box through a pipeline, a manual switch valve and a proportional valve are arranged in the middle, the air intake pressure stabilizing box is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the air inlet of the air compressor to be tested through a pipeline, an air flow meter, a temperature sensor and a pressure sensor are arranged in the middle, the air outlet of the air compressor to be tested is connected to the back pressure valve through a pipeline, a temperature sensor and a pressure sensor are arranged in the middle, the back pressure valve is connected to the exhaust pressure stabilizing box through a pipeline, the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline, a proportional valve is arranged in the middle, the vacuum pump is connected to the tail exhaust muffler through a pipeline, and a manual switch valve is arranged in the middle;

[0012] The expansion water tank stores deionized water, the main circulating water pump is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the PTC heater through a pipeline, the auxiliary circulating water pump is connected to the cooling fan through a pipeline, a flow meter is arranged in the middle, the cooling fan is connected to the cooling water inlet of the air compressor to be tested and the controller through a pipeline, the cooling water outlet of the air compressor to be tested is connected to the auxiliary circulating water pump through a pipeline, a water filter is arranged in the middle, and the collected signal is transmitted to the controller through a signal line, and the data is processed and displayed by the host computer.

[0013] Preferably, the testing system further comprises:

[0014] Vacuum pump, used to establish system vacuum;

[0015] Back pressure valve, used to control the pressure at the air compressor outlet to simulate the pressure changes at high altitudes;

[0016] Pressure stabilizer box, used to stabilize system pressure;

[0017] Air filter, used to filter impurities from the air entering the system;

[0018] Proportional valve, used to adjust the system gas flow;

[0019] Flow meter, used to measure the system gas flow;

[0020] Tail exhaust muffler, used to reduce the noise of high-pressure gas discharged from the system;

[0021] a water pump to circulate the thermal management system fluid;

[0022] Expansion tank, used to store thermal management system fluid;

[0023] Water filter, used to filter impurities in the thermal management system liquid;

[0024] Flow meter: used to measure the liquid flow of thermal management system;

[0025] The air outlet of the air compressor is connected to the exhaust pressure stabilizing box through a back pressure valve, and the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline. The vacuum pump is used to maintain a negative pressure environment in the system to ensure that the airflow and pressure meet the requirements under high altitude conditions.

[0026] Preferably, the PTC heater in the thermal management system works in conjunction with a cooling fan to adjust the temperature of air entering the air compressor, thereby simulating different ambient temperature conditions.

[0027] A test method for simulating high altitude conditions of an air compressor comprises the following steps:

[0028] S1 Start-up preparation: Start the test device, open the manual switch valve, fully open the proportional valve and back pressure valve, connect the test gas circuit, and check the initialization response of the air compressor;

[0029] S2 test preparation: Start the air compressor and adjust its speed to the lowest; establish system vacuum through the vacuum pump so that the pressure of the intake and exhaust pressure regulators reach the preset target value;

[0030] S3 air compressor performance test: set the air compressor speed, and gradually adjust the back pressure valve and proportional valve opening, monitor the air compressor surge phenomenon and performance data until the air compressor reaches the designed maximum speed;

[0031] S4 test ends: all valves are fully opened, the internal air pressure of the system is restored to the ambient pressure, the test is stopped and the device is closed.

[0032] Preferably, in step S2, if the system cannot establish a vacuum degree within a preset time, the system will try to establish a vacuum degree again by increasing the target pressure. If the vacuum degree still cannot be established, the test will be stopped and a fault will be prompted.

[0033] Preferably, the air compressor performance test in step S3 includes:

[0034] Gradually reduce the opening of the back pressure valve and at the same time increase the opening of the proportional valve in front of the vacuum pump to maintain the stability of the system vacuum degree;

[0035] Monitor the surging phenomenon of the air compressor in real time. If surging occurs, the system will automatically fully open the back pressure valve, enter the protection mode and stop the test.

[0036] Preferably, in step S3, the rotation speed of the air compressor is gradually increased according to a set increment Vstep until the designed maximum rotation speed is reached.

[0037] Preferably, in the startup preparation stage of step S1, the response time of the air compressor initialization does not exceed 600ms. If the response time exceeds 600ms, the system prompts a fault and stops the test.

[0038] Preferably, the air flow, temperature and pressure data during the test are collected in real time by an air flow meter, a temperature sensor and a pressure sensor, and transmitted to a main control computer for analysis and processing.

[0039] Preferably, the test end stage further includes: after the test is completed, the system returns to ambient air pressure, all air circuit valves are closed, and a test report is generated to record the performance data of the air compressor under different altitude conditions.

[0040] The present invention provides a high altitude test device and a test method for simulating an air compressor.

[0041] Beneficial effects:

[0042] 1. The present invention simulates the working environment of the air compressor under high altitude conditions through the device, without relying on the expensive and time-consuming traditional environmental chamber testing method. It can complete the air compressor performance test under air pressure and temperature conditions at different altitudes in a short time, thereby greatly reducing the test cost and improving the test efficiency. At the same time, the device has a simple structure and is easy to operate. It can be widely used in different types of air compressors and is highly flexible and economical.

[0043] 2. The present invention realizes real-time monitoring and collection of data such as flow, pressure, and temperature during the test process through various measuring devices such as air flow meters, temperature sensors, and pressure sensors, and performs data analysis and processing through the main control computer, thereby ensuring the accuracy and repeatability of air compressor performance evaluation. Especially under high-altitude and low-pressure conditions, the vacuum pump and proportional valve can be precisely adjusted to simulate the real aerodynamic environment and provide reliable test data support.

[0044] 3. The present invention uses an intelligent control system to monitor the entire process, automatically detect the initialization response of the air compressor, and provide real-time protection against abnormal phenomena such as surge, ensuring the safety of the test process. When the air compressor responds to timeout or abnormal conditions, the system will automatically issue a prompt and stop the test, effectively preventing potential failures or damage during the test. At the same time, the test report generated after the test is completed provides a comprehensive and accurate reference for subsequent performance optimization and system improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a complete system architecture diagram of the present invention;

[0046] Figure 2 It is a system control flow chart of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please see attached Figure 1 - Attachment Figure 2 The embodiment of the present invention provides a high altitude test device for simulating an air compressor, comprising:

[0049] The test system includes a fan for simulating air pressure and flow at different altitudes and delivering simulated ambient air to the air compressor to be tested;

[0050] Thermal management system, including main circulating water pump, expansion water tank and auxiliary circulating water pump, is used to adjust the temperature of air entering the air compressor to ensure that the air compressor works within the set temperature range;

[0051] The acquisition control system, including an air flow meter, is used to collect air flow, temperature and pressure data in real time during the air compressor test process, and transmit the data to the main control computer for analysis and processing;

[0052] The fan is connected to the air filter through a pipeline, the air filter is connected to the air intake pressure stabilizing box through a pipeline, a manual switch valve and a proportional valve are arranged in the middle, the air intake pressure stabilizing box is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the air inlet of the air compressor to be tested through a pipeline, an air flow meter, a temperature sensor and a pressure sensor are arranged in the middle, the air outlet of the air compressor to be tested is connected to the back pressure valve through a pipeline, a temperature sensor and a pressure sensor are arranged in the middle, the back pressure valve is connected to the exhaust pressure stabilizing box through a pipeline, the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline, a proportional valve is arranged in the middle, the vacuum pump is connected to the tail exhaust muffler through a pipeline, and a manual switch valve is arranged in the middle;

[0053] The expansion water tank stores deionized water, the main circulating water pump is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the PTC heater through a pipeline, the auxiliary circulating water pump is connected to the cooling fan through a pipeline, a flow meter is arranged in the middle, the cooling fan is connected to the cooling water inlet of the air compressor to be tested and the controller through a pipeline, the cooling water outlet of the air compressor to be tested is connected to the auxiliary circulating water pump through a pipeline, a water filter is arranged in the middle, and the collected signal is transmitted to the controller through a signal line, and the data is processed and displayed by the host computer.

[0054] The test system further comprises:

[0055] Vacuum pump, used to establish system vacuum;

[0056] Back pressure valve, used to control the pressure at the air compressor outlet to simulate the pressure changes at high altitudes;

[0057] Pressure stabilizer box, used to stabilize system pressure;

[0058] Air filter, used to filter impurities from the air entering the system;

[0059] Proportional valve, used to adjust the system gas flow;

[0060] Flow meter, used to measure the system gas flow;

[0061] Tail exhaust muffler, used to reduce the noise of high-pressure gas discharged from the system;

[0062] a water pump to circulate the thermal management system fluid;

[0063] Expansion tank, used to store thermal management system fluid;

[0064] Water filter, used to filter impurities in the thermal management system liquid;

[0065] Flow meter: used to measure the liquid flow of thermal management system;

[0066] The air outlet of the air compressor is connected to the exhaust pressure stabilizing box through a back pressure valve, and the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline. The vacuum pump is used to maintain a negative pressure environment in the system to ensure that the airflow and pressure meet the requirements under high altitude conditions.

[0067] The PTC heater in the thermal management system works in conjunction with the cooling fan to adjust the temperature of the air entering the air compressor, thereby simulating different ambient temperature conditions.

[0068] Specifically, the test system includes a fan, an air filter, a manual switch valve, a proportional valve, an intake pressure regulating box, a heat exchanger, a back pressure valve, an exhaust pressure regulating box, a vacuum pump and a tail exhaust muffler, which are used to simulate the air pressure and flow under different altitude conditions and deliver the simulated ambient air to the air compressor to be tested. The fan is connected to the air filter through a pipeline, the air filter is connected to the intake pressure regulating box through a manual switch valve and a proportional valve, the intake pressure regulating box is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the air inlet of the air compressor to be tested through a pipeline, an air flow meter, a temperature sensor and a pressure sensor are arranged in the middle, the air outlet of the air compressor to be tested is connected to the back pressure valve through a pipeline, a temperature sensor and a pressure sensor are arranged in the middle, the back pressure valve is connected to the exhaust pressure regulating box through a pipeline, the exhaust pressure regulating box is connected to the vacuum pump through a pipeline, a proportional valve is arranged in the middle, the vacuum pump is connected to the tail exhaust muffler through a pipeline, and a manual switch valve is arranged in the middle. The thermal management system includes a main circulating water pump, an expansion water tank, a PTC heater, an auxiliary circulating water pump, a cooling fan and a water filter. The expansion water tank is used to store deionized water, the main circulating water pump is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the PTC heater through a pipeline, the auxiliary circulating water pump is connected to the cooling fan through a pipeline, a flow meter is arranged in the middle, the cooling fan is connected to the cooling water inlet of the air compressor to be tested and the controller through a pipeline, the cooling water outlet of the air compressor to be tested is connected to the auxiliary circulating water pump through a pipeline, and a water filter is arranged in the middle to filter impurities in the water to prevent internal corrosion of the air compressor. The acquisition control system includes an air flow meter, a temperature sensor, a pressure sensor, a main control computer and a signal line, which is used to collect air flow, temperature and pressure data during the air compressor test in real time, and transmit the data to the main control computer through the signal line for data processing and display. The test system further includes a vacuum pump, which is used to establish the vacuum degree of the system so that the system can simulate the low air pressure conditions in a high altitude environment; the back pressure valve is used to control the air outlet pressure of the air compressor, thereby simulating the air pressure changes under high altitude conditions. The vacuum pump works in conjunction with the back pressure valve, and the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline. The vacuum pump is used to maintain the negative pressure environment inside the system to ensure that the airflow and pressure meet the requirements under high altitude conditions. The PTC heater in the thermal management system works in conjunction with the cooling fan to adjust the temperature of the air entering the air compressor, thereby simulating different ambient temperature conditions and ensuring that the air compressor operates normally within the set operating temperature range.

[0069] Please see attached Figure 1 - Attachment Figure 2 The embodiment of the present invention provides a test method for simulating high altitude conditions of an air compressor, comprising the following steps:

[0070] S1 Start-up preparation: Start the test device, open the manual switch valve, fully open the proportional valve and back pressure valve, connect the test gas circuit, and check the initialization response of the air compressor;

[0071] S2 test preparation: Start the air compressor and adjust its speed to the lowest; establish system vacuum through the vacuum pump so that the pressure of the intake and exhaust pressure regulators reach the preset target value;

[0072] S3 air compressor performance test: set the air compressor speed, and gradually adjust the back pressure valve and proportional valve opening, monitor the air compressor surge phenomenon and performance data until the air compressor reaches the designed maximum speed;

[0073] S4 test ends: all valves are fully opened, the internal air pressure of the system is restored to the ambient pressure, the test is stopped and the device is closed.

[0074] In step S2, if the system cannot establish a vacuum degree within a preset time, the system will try to establish a vacuum degree again by increasing the target pressure. If the vacuum degree still cannot be established, the test will be stopped and a fault will be prompted.

[0075] The air compressor performance test in step S3 includes:

[0076] Gradually reduce the opening of the back pressure valve and at the same time increase the opening of the proportional valve in front of the vacuum pump to maintain the stability of the system vacuum degree;

[0077] Monitor the surge of the air compressor in real time. If surge occurs, the system will automatically fully open the back pressure valve, enter the protection mode and stop the test.

[0078] In step S3, the speed of the air compressor is gradually increased according to the set increment Vstep until the designed maximum speed is reached.

[0079] Specifically, S1, start-up preparation, start the test device, open the manual switch valve, fully open the proportional valve and the back pressure valve, connect the test air circuit, and check the initialization response of the air compressor to ensure the normal operation of each component of the system and smooth communication; S2, test preparation, start the air compressor, and adjust its speed to the minimum, establish the system vacuum through the vacuum pump, and make the pressure of the intake pressure regulating box and the exhaust pressure regulating box reach the preset target value Pset. If the system cannot establish the vacuum within the preset time, try to establish the vacuum again by increasing the target pressure. If the vacuum still cannot be established, stop the test and prompt the fault; S3, air compressor performance test, set the air compressor speed V, and gradually adjust the opening of the back pressure valve and the proportional valve to maintain the system vacuum When the air compressor is stable, gradually reduce the opening of the back pressure valve and increase the opening of the proportional valve in front of the vacuum pump at the same time, monitor the surging phenomenon and performance data of the air compressor in real time. If the air compressor surges, the system automatically opens the back pressure valve to protect the air compressor, enters the protection mode and stops the test; if there is no surge, the speed of the air compressor is gradually increased according to the set increment Vstep until the designed maximum speed is reached. During this period, the performance data such as the air compressor intake flow, outlet flow, temperature and pressure are continuously collected to ensure the stability of the system vacuum and the accuracy of data collection; S4, the test is over, all valves are fully opened, the internal air pressure of the system is restored to the ambient pressure, the manual switch valve is closed, the test is stopped and the device is turned off to ensure the safe shutdown of the system and prevent misoperation. This test method simulates the air pressure and ambient temperature under high altitude conditions by gradually adjusting the air compressor speed, the back pressure valve opening and the system vacuum, ensuring the stability and performance of the air compressor under extreme conditions, and at the same time ensuring the safety of the test process and the reliability of the equipment operation through real-time monitoring and protection mechanisms.

[0080] In the startup preparation stage of step S1, the response time of the air compressor initialization shall not exceed 600ms. If the response time exceeds 600ms, the system will prompt a fault and stop the test.

[0081] The air flow, temperature and pressure data during the test are collected in real time by an air flow meter, a temperature sensor and a pressure sensor, and transmitted to a main control computer for analysis and processing.

[0082] The test end stage further includes: after the test is completed, the system returns to ambient air pressure, all air circuit valves are closed, and a test report is generated to record the performance data of the air compressor under different altitude conditions.

[0083] Specifically, S1, the startup preparation stage, start the test device, open the manual switch valve, fully open the proportional valve and the back pressure valve, connect the test air line, check the initialization response of the air compressor, where the response time of the air compressor initialization does not exceed 600ms. If the response time exceeds 600ms, the system will prompt a fault and automatically stop the test; S2, the test preparation stage, start the air compressor, and adjust its speed to the lowest, establish the system vacuum through the vacuum pump, and make the pressure of the intake pressure regulating tank and the exhaust pressure regulating tank reach the preset target value Pset. If the system cannot establish the vacuum within the preset time, try to establish the vacuum again by increasing the target pressure. If the vacuum still cannot be established, stop the test and prompt a fault; S3, the air compressor performance test stage, set the air compressor speed V, and gradually adjust the back pressure valve and the proportional valve opening to keep the system vacuum stable, gradually reduce the opening of the back pressure valve and increase the opening of the proportional valve in front of the vacuum pump, monitor the surging phenomenon and performance data of the air compressor in real time, if the air compressor If the compressor experiences surge, the system automatically fully opens the back pressure valve, enters the protection mode and stops the test; if there is no surge, the speed of the air compressor is gradually increased according to the set increment Vstep until the designed maximum speed is reached. During this period, the performance data such as the air intake flow, air outlet flow, temperature and pressure of the air compressor are continuously collected to ensure the stability of the system vacuum and accurate data collection; the air flow, temperature and pressure data are collected in real time by the air flow meter, temperature sensor and pressure sensor, and transmitted to the main control computer for analysis and processing; S4, the end of the test, all valves are fully opened to restore the internal air pressure of the system to the ambient pressure, the manual switch valve is closed, the test is stopped and the device is turned off to ensure the safe shutdown of the system and prevent misoperation; this stage further includes that after the test is completed, the system is restored to the ambient pressure, all air circuit valves are closed, and a test report is generated to record the performance data of the air compressor under different altitude conditions, providing a comprehensive analysis of the operating effect of the air compressor under extreme environmental conditions.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high altitude test device for simulating an air compressor, characterized in that: include: The test system includes a fan for simulating air pressure and flow at different altitudes and delivering simulated ambient air to the air compressor to be tested; Thermal management system, including main circulating water pump, expansion water tank and auxiliary circulating water pump, is used to adjust the temperature of air entering the air compressor to ensure that the air compressor works within the set temperature range; The acquisition control system, including an air flow meter, is used to collect air flow, temperature and pressure data in real time during the air compressor test process, and transmit the data to the main control computer for analysis and processing; The fan is connected to the air filter through a pipeline, the air filter is connected to the air intake pressure stabilizing box through a pipeline, a manual switch valve and a proportional valve are arranged in the middle, the air intake pressure stabilizing box is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the air inlet of the air compressor to be tested through a pipeline, an air flow meter, a temperature sensor and a pressure sensor are arranged in the middle, the air outlet of the air compressor to be tested is connected to the back pressure valve through a pipeline, a temperature sensor and a pressure sensor are arranged in the middle, the back pressure valve is connected to the exhaust pressure stabilizing box through a pipeline, the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline, a proportional valve is arranged in the middle, the vacuum pump is connected to the tail exhaust muffler through a pipeline, and a manual switch valve is arranged in the middle; The expansion water tank stores deionized water, the main circulating water pump is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the PTC heater through a pipeline, the auxiliary circulating water pump is connected to the cooling fan through a pipeline, a flow meter is arranged in the middle, the cooling fan is connected to the cooling water inlet of the air compressor to be tested and the controller through a pipeline, the cooling water outlet of the air compressor to be tested is connected to the auxiliary circulating water pump through a pipeline, a water filter is arranged in the middle, and the collected signal is transmitted to the controller through a signal line, and the data is processed and displayed by the host computer.

2. The high altitude test device for simulating an air compressor according to claim 1, characterized in that: The test system further comprises: Vacuum pump, used to establish system vacuum; Back pressure valve, used to control the pressure at the air compressor outlet to simulate the pressure changes at high altitudes; Pressure stabilizer box, used to stabilize system pressure; Air filter, used to filter impurities from the air entering the system; Proportional valve, used to adjust the system gas flow; Flow meter, used to measure the system gas flow; Tail exhaust muffler, used to reduce the noise of high-pressure gas discharged from the system; a water pump to circulate the thermal management system fluid; Expansion tank, used to store thermal management system fluid; Water filter, used to filter impurities in the thermal management system liquid; Flow meter: used to measure the liquid flow of thermal management system; The air outlet of the air compressor is connected to the exhaust pressure stabilizing box through a back pressure valve, and the exhaust pressure stabilizing box is connected to the vacuum pump through a pipeline. The vacuum pump is used to maintain a negative pressure environment in the system to ensure that the airflow and pressure meet the requirements under high altitude conditions.

3. The high altitude test device for simulating an air compressor according to claim 1, characterized in that: The PTC heater in the thermal management system works in conjunction with the cooling fan to adjust the temperature of the air entering the air compressor, thereby simulating different ambient temperature conditions.

4. A test method for simulating high altitude conditions for an air compressor, applied to a test device for simulating high altitude conditions for an air compressor as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1 Start-up preparation: Start the test device, open the manual switch valve, fully open the proportional valve and back pressure valve, connect the test gas circuit, and check the initialization response of the air compressor; S2 test preparation: Start the air compressor and adjust its speed to the lowest; The vacuum degree of the system is established by a vacuum pump so that the pressure of the intake and exhaust pressure regulators reaches the preset target value; S3 air compressor performance test: set the air compressor speed, and gradually adjust the back pressure valve and proportional valve opening, monitor the air compressor surge phenomenon and performance data until the air compressor reaches the designed maximum speed; S4 test ends: all valves are fully opened, the internal air pressure of the system is restored to the ambient pressure, the test is stopped and the device is closed.

5. The method for testing a simulated air compressor under high altitude conditions according to claim 4, characterized in that: In step S2, if the system cannot establish a vacuum degree within a preset time, the system will try to establish a vacuum degree again by increasing the target pressure. If the vacuum degree still cannot be established, the test will be stopped and a fault will be prompted.

6. The method for testing a simulated air compressor under high altitude conditions according to claim 4, characterized in that: The air compressor performance test in step S3 includes: Gradually reduce the opening of the back pressure valve and at the same time increase the opening of the proportional valve in front of the vacuum pump to maintain the stability of the system vacuum degree; Monitor the surge of the air compressor in real time. If surge occurs, the system will automatically fully open the back pressure valve, enter the protection mode and stop the test.

7. The method for testing a simulated air compressor under high altitude conditions according to claim 4, characterized in that: In step S3, the speed of the air compressor is gradually increased according to the set increment Vstep until the designed maximum speed is reached.

8. The method for testing a simulated air compressor under high altitude conditions according to claim 4, characterized in that: In the startup preparation stage of step S1, the response time of the air compressor initialization shall not exceed 600ms. If the response time exceeds 600ms, the system will prompt a fault and stop the test.

9. The method for testing a simulated air compressor under high altitude conditions according to claim 4, characterized in that: The air flow, temperature and pressure data during the test are collected in real time by an air flow meter, a temperature sensor and a pressure sensor, and transmitted to a main control computer for analysis and processing.

10. The method for testing an air compressor under high altitude conditions according to claim 4, characterized in that: The test end stage further includes: after the test is completed, the system returns to ambient air pressure, all air circuit valves are closed, and a test report is generated to record the performance data of the air compressor under different altitude conditions.

Images