Test device for testing an air compressor

Abstract

This invention provides a testing device for testing an air compressor. The air compressor includes a compression end, a motor, and an expansion end connected in sequence. The testing device includes: an air supply module connected in series between the air inlet of the testing device and the air inlet of the compression end, for supplying gas located outside the testing device to the compression end; a first cooling module connected in series between the air outlet of the compression end and the air inlet of the expansion end, for cooling the gas compressed and pressurized by the compression end and supplying it to the expansion end; and a second cooling module connected in series between the air outlet of the expansion end and the air outlet of the testing device, for cooling the gas leaving the expansion end and discharging it outside the testing device. The testing device provided by this invention provides necessary reference experimental data for evaluating the performance of fuel cell air compressors and simulating the actual air consumption of fuel cells.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically to a testing device for testing air compressors. Background Technology

[0002] Fuel cell systems generate electricity to drive the equipment through the redox reaction of hydrogen and oxygen ions on a proton exchange membrane. An air compressor, as a crucial air supply component, provides high-pressure air as fuel. The air after passing through the proton exchange membrane still possesses high energy and can return to the air compressor to recover pressure energy for work through a turbine expander module. This type of air compressor is called a prime mover integrated air compressor with exhaust gas turbine expander. Traditional air compressor test setups are single-linear processes. Atmospheric air at normal temperature and pressure enters the air compressor through the inlet pipe, is pressurized, and then discharged into the atmosphere. When testing fuel cell air compressor units with exhaust gas turbine expanders, this type of test setup has three main problems: 1. The test setup is designed for the compressor and cannot assess the exhaust gas recovery capacity at the expander end; 2. The air flow rate from the inlet to the outlet is fixed, and the temperature and pressure are constant, making it impossible to simulate the air consumption and utilization of the fuel cell system; 3. The inlet of a fuel cell air compressor is often at negative pressure, while the inlet of a traditional air compressor test setup is at atmospheric pressure. Therefore, in order to effectively simulate the use of compressed air by a fuel cell system and test the exhaust gas recovery capability of the air compressor with exhaust gas turbine expansion, it is necessary to adjust the traditional air compressor test device.

[0003] Therefore, how to evaluate the performance of the air compressor in a fuel cell system has become an urgent research topic. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device for testing air compressors, providing necessary reference experimental data for evaluating the performance of fuel cell air compressors and simulating the actual air consumption of fuel cells.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A testing apparatus for testing an air compressor, the air compressor comprising a compression end, a motor, and an expansion end connected in sequence, the testing apparatus comprising:

[0007] A gas supply module is connected in series between the air inlet of the test device and the air inlet of the compression end, and is used to supply gas located outside the test device to the compression end;

[0008] The first cooling module is connected in series between the outlet of the compression end and the inlet of the expansion end, and is used to cool the gas that has been compressed and pressurized by the compression end and deliver it to the expansion end.

[0009] The second cooling module is connected in series between the air outlet of the expansion end and the air outlet of the test device, and is used to cool the gas leaving the expansion end and discharge it outside the test device.

[0010] In some embodiments of the present invention, the gas supply module includes a first flow meter, a first pressure sensor, and a first temperature sensor;

[0011] The first flow meter, the first pressure sensor, and the first temperature sensor are all connected in series between the air inlet of the test device and the air inlet of the compression end;

[0012] The first flow meter is used to monitor the flow rate of gas entering the compression end from outside the test device;

[0013] The first pressure sensor is used to monitor the pressure of the gas entering the compression end from outside the test device;

[0014] The first temperature sensor is used to monitor the temperature of the gas entering the compression end from outside the test device.

[0015] In some embodiments of the present invention, the gas supply module includes a first valve;

[0016] The first valve is connected in series between the air inlet of the test device and the air inlet of the compression end;

[0017] The first valve is used to control the gas located outside the test device from entering the test device.

[0018] In some embodiments of the present invention, the gas supply module includes a filter and a third ball valve;

[0019] The filter is connected in series between the first valve and the air inlet of the compression end, and is used to filter impurities in the gas entering the gas supply module from outside the test device;

[0020] The third ball valve is connected in series between the first valve and the filter, and is used to allow gas located outside the test device to enter the compression end under negative pressure.

[0021] In some embodiments of the present invention, the first cooling module includes a first cooler;

[0022] The first cooler is connected in series between the outlet of the compression end and the inlet of the expansion end, and the first cooler is used to cool the gas that has been compressed and pressurized by the compression end.

[0023] In some embodiments of the present invention, the first cooling module further includes a first ball valve and a first shut-off valve;

[0024] Both the first ball valve and the first shut-off valve are connected to the first cooler. The first ball valve is used to control the flow of the cooling medium in the first cooler, and the first shut-off valve is used to adjust the throttling of the cooling medium in the first cooler.

[0025] In some embodiments of the present invention, the first cooling module further includes a second valve and a third valve;

[0026] The first cooler, the second valve, and the air inlet of the expansion end are connected in series.

[0027] The first cooler, the third valve, and the air outlet of the test device are connected in series.

[0028] In some embodiments of the present invention, the first cooling module further includes a second pressure sensor, a second temperature sensor, and a second flow meter;

[0029] The second pressure sensor and the second temperature sensor are both connected in series between the second valve and the outlet of the expansion end. The second pressure sensor is used to monitor the pressure of the gas entering the expansion end, and the second temperature sensor is used to monitor the temperature of the gas entering the expansion end.

[0030] The second flow meter is connected in series between the first cooler and the third valve, and the second flow meter is used to monitor the flow rate of gas passing through the third valve.

[0031] In some embodiments of the present invention, the second cooling module includes a second cooler;

[0032] The second cooler is connected in series between the outlet of the expansion end and the outlet of the test device, and the second cooler is used to cool the gas leaving the expansion end.

[0033] In some embodiments of the present invention, the second cooling module further includes a third pressure sensor and a third temperature sensor;

[0034] The third pressure sensor and the third temperature sensor are both connected in series between the air outlet of the expansion end and the air inlet of the second cooler.

[0035] The third pressure sensor is used to monitor the pressure of the gas leaving the expansion end;

[0036] The third temperature sensor is used to monitor the temperature of the gas leaving the expansion end.

[0037] In some embodiments of the present invention, the second cooling module further includes a second ball valve and a second shut-off valve;

[0038] The second ball valve and the second shut-off valve are both connected to the second cooler. The second ball valve is used to control the flow of the cooling medium in the second cooler, and the second shut-off valve is used to regulate the throttling of the cooling medium in the second cooler.

[0039] In some embodiments of the present invention, the second cooling module further includes a fourth valve, which is connected in series between the air outlet of the second cooler and the air outlet of the test device;

[0040] The second cooling module also includes an anti-surge valve, which is connected in series between the outlet of the second cooler and the inlet of the compression end, or between the outlet of the second cooler and the outlet of the test device.

[0041] In some embodiments of the present invention, the testing apparatus further includes a third cooling module;

[0042] The motor is connected in series in the third cooling module, which is used to cool the motor.

[0043] In some embodiments of the present invention, the third cooling module includes a sixth valve and a seventh valve;

[0044] The sixth valve is connected in series between the motor and the liquid outlet of a cooling device, and the seventh valve is connected in series between the liquid inlet of the cooling device. The cooling device is used to provide cooling medium for the motor.

[0045] In some embodiments of the present invention, the third cooling module further includes a fourth temperature sensor and a fourth flow meter;

[0046] The fourth temperature sensor and the fourth flow meter are both connected in series between the motor and the cooling equipment;

[0047] The fourth temperature sensor is used to monitor the temperature of the cooling medium provided by the cooling equipment, and the fourth flow meter is used to monitor the flow rate of the cooling medium provided by the cooling equipment.

[0048] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0049] 1. The testing device for testing air compressors provided by the present invention can simulate the gas consumption of fuel cell systems under complex operating conditions, thereby achieving effective and accurate simulation of the actual operation of fuel cell air compressors; furthermore, in some embodiments of the present invention, the aforementioned fuel cell air compressor is a prime mover integrated type, therefore, the testing device provided by the present invention can also achieve effective and accurate simulation of the actual operation of prime mover integrated type fuel cell air compressors.

[0050] 2. The testing device for testing air compressors provided by this invention is suitable for air compressors with exhaust gas turbine expansion. It can effectively measure the inlet and outlet parameters of the compression end and expansion end of the air compressor and provide accurate and complete test data to provide necessary test data reference for product optimization design.

[0051] 3. The cooler and various regulating valves in the testing device for testing air compressors provided by this invention have a wide adjustable range, thus enabling a safe, fast and accurate comprehensive and detailed evaluation of the overall performance of air compressors under different flow rates, temperatures and pressures, in order to explore the optimal operating range of the air compressor.

[0052] 4. The testing device for testing air compressors provided by the present invention also has the advantages of low cost and the ability to replace and adjust components such as pipes and flanges according to different models and specifications of air compressors. In other words, the testing device provided by the present invention has good versatility, thereby reducing the cost of performance simulation tests for various air compressors. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 A piping diagram of a testing device for testing an air compressor, provided according to an embodiment of the present invention.

[0055] The main reference numerals in the accompanying drawings of this invention are explained as follows:

[0056] 1-Compression end; 2-Motor; 3-Expansion end; 4-First flow meter; 5-First pressure sensor; 6-First temperature sensor; 7-First valve; 8-Filter; 9-First cooler; 10-First ball valve; 11-First shut-off valve; 12-Second valve; 13-Third valve; 14-Second pressure sensor; 15-Second temperature sensor; 16-Second flow meter; 17-Second cooler; 18-Third pressure sensor; 19-Third temperature sensor; 20-Fourth valve; 21-Anti-surge valve; 22-Sixth valve; 23-Seventh valve; 24-Fourth temperature sensor; 25-Fourth flow meter; 26-Third ball valve; 27-Second shut-off valve; 28-Second ball valve; 29-Thermometer. Detailed Implementation

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] The present invention provides a testing device for testing air compressors, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of the present invention. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0059] like Figure 1 As shown in some embodiments of the present invention, a testing device for testing an air compressor includes a compression end 1, a motor 2, and an expansion end 3 connected in sequence. The testing device includes: an air supply module (unlabeled), connected in series between the air inlet (unlabeled) of the testing device and the compression end 1, for supplying gas located outside the testing device to the compression end 1; a first cooling module (unlabeled), connected in series between the air outlet of the compression end 1 and the air inlet of the expansion end 3, for cooling the gas compressed and pressurized by the compression end 1 and supplying it to the expansion end 3; and a second cooling module (unlabeled), connected in series between the air outlet of the expansion end 3 and the air outlet of the testing device, for cooling the gas leaving the expansion end 3 and discharging it outside the testing device. The testing device for testing air compressors provided by the present invention can effectively and accurately simulate the actual operating conditions of air compressors under complex working conditions.

[0060] Specifically, the first cooling module can simulate the performance of the expansion end 3 of the air compressor under different temperature conditions; the second cooling module can adjust to ensure that the exhaust temperature leaving the expansion end 3 is within a safe range.

[0061] In some embodiments of the present invention, the air compressor is an air compressor in a fuel cell system, and the first cooling module can simulate the consumption and utilization of compressed air by the fuel cell system and provide the air compressor with air at a temperature similar to that of the fuel cell exhaust. The second cooling module can prevent the high-temperature air generated at the expansion end 3 from being directly discharged into the atmosphere or the external environment of the device, thereby avoiding safety hazards.

[0062] In some embodiments of the present invention, the air compressor is the air compressor in the prime mover integrated fuel cell system. It is understood that the testing device provided by the present invention can also effectively and accurately simulate the actual operation of the prime mover integrated fuel cell air compressor.

[0063] It is worth noting that the testing device for testing air compressors provided by this invention is suitable for air compressors with exhaust gas turbine expansion. It can effectively measure the inlet and outlet parameters of the compression and expansion ends of the air compressor and provide accurate and complete test data to provide necessary test data reference for product optimization design.

[0064] It is understood that the term "gas" in the specification of this invention includes air.

[0065] like Figure 1 As shown, in some embodiments of the present invention, the gas supply module includes a first flow meter 4, a first pressure sensor 5, and a first temperature sensor 6; the first flow meter 4, the first pressure sensor 5, and the first temperature sensor 6 are all connected in series between the air inlet of the test device and the air inlet of the compression end 1; the first flow meter 4 is used to monitor the flow rate of gas entering the compression end 1 from outside the test device; the first pressure sensor 5 is used to monitor the pressure of gas entering the compression end 1 from outside the test device; and the first temperature sensor 6 is used to monitor the temperature of gas entering the compression end 1 from outside the test device. Specifically, the above solution aims to effectively measure the thermal state of the gas at the inlet of the test device and adjust the valve opening at the air inlet of the test device in a timely manner according to the measurement structure to ensure that the gas at the air inlet of the test device is in a suitable negative pressure state, so as to accurately simulate the air compressor intake condition in the fuel cell system.

[0066] like Figure 1 As shown, in some embodiments of the present invention, the gas supply module includes a first valve 7; the first valve 7 is connected in series between the air inlet of the testing device and the air inlet of the compression end 1; the first valve 7 is used to control the entry of gas located outside the testing device into the testing device. Exemplarily, in some embodiments of the present invention, the first valve 7 may be a shut-off valve, and the specific parameters can be selected and adjusted according to actual needs.

[0067] like Figure 1 As shown, in some embodiments of the present invention, the gas supply module includes a filter 8; the filter 8 is connected in series between the first valve 7 and the air inlet of the compression end 1; the filter 8 is used to filter impurities in the gas entering the gas supply module from outside the test device.

[0068] like Figure 1 As shown, in some embodiments of the present invention, the gas supply module includes a third ball valve 26; the third ball valve 26 is connected in series between the first valve 7 and the filter 8, for allowing gas located outside the test device to enter the compression end 1 under negative pressure.

[0069] In some embodiments of the present invention, the air compressor can be the air compressor in a fuel cell system. It is worth noting that the inlet of the air compressor in a fuel cell system is generally under negative pressure. However, in the prior art, when testing the exhaust gas recovery capacity of the expansion end of an air compressor with exhaust gas turbine expansion, this negative pressure real working condition was not simulated, resulting in a certain deviation between the measured data and the actual situation. The third ball valve 26 in the test device of the present invention can provide this negative pressure condition.

[0070] like Figure 1 As shown, in some embodiments of the present invention, the first cooling module includes a first cooler 9; the first cooler 9 is connected in series between the air inlet of the compression end 1 and the air outlet of the expansion end 3, and the first cooler 9 is used to cool the gas compressed and pressurized by the compression end 1.

[0071] like Figure 1 As shown, in some embodiments of the present invention, the first cooling module further includes a first ball valve 10 and a first shut-off valve 11; both the first ball valve 10 and the first shut-off valve 11 are connected to the first cooler 9, the first ball valve 10 is used to control the flow of the cooling medium in the first cooler 9, and the first shut-off valve 11 is used to adjust the throttling of the cooling medium in the first cooler 9.

[0072] like Figure 1 As shown, in some embodiments of the present invention, the first cooling module further includes a second valve 12 and a third valve 13; the first cooler 9, the second valve 12, and the air inlet of the expansion end 3 are connected in series; the first cooler 9, the third valve 13, and the air outlet of the testing device are connected in series. In some embodiments of the present invention, the second valve 12 may specifically be a pneumatic regulating valve, and the third valve 13 may be a shut-off valve; the more specific parameter specifications of these two valves can be selected according to the actual situation.

[0073] like Figure 1 As shown, in some embodiments of the present invention, the first cooling module further includes a second pressure sensor 14, a second temperature sensor 15, and a second flow meter 16; the second pressure sensor 14 and the second temperature sensor 15 are both connected in series between the second valve 12 and the expansion end 3, the second pressure sensor 14 is used to monitor the pressure of the gas entering the expansion end 3, and the second temperature sensor 15 is used to monitor the temperature of the gas entering the expansion end 3; the second flow meter 16 is connected in series between the first cooler 9 and the third valve 13, and the second flow meter 16 is used to monitor the flow rate of the gas passing through the third valve 13.

[0074] like Figure 1As shown, in some embodiments of the present invention, the second cooling module includes a second cooler 17; the second cooler 17 is connected in series between the outlet of the expansion end 3 and the outlet of the test device, and the second cooler 17 is used to cool the gas leaving the expansion end 3.

[0075] like Figure 1 As shown, in some embodiments of the present invention, the second cooling module further includes a third pressure sensor 18 and a third temperature sensor 19; both the third pressure sensor 18 and the third temperature sensor 19 are connected in series between the outlet of the expansion end 3 and the inlet of the second cooler 17; the third pressure sensor 18 is used to monitor the pressure of the gas leaving the expansion end 3; the third temperature sensor 19 is used to monitor the temperature of the gas leaving the expansion end 3. It can be understood that the above configuration can monitor the thermal state of the gas at the outlet of the expansion end 3 and obtain test data to evaluate the work capacity of the expansion end of the tested air compressor.

[0076] like Figure 1 As shown, in some embodiments of the present invention, the second cooling module further includes a second ball valve 28 and a second shut-off valve 27; both the second ball valve 28 and the second shut-off valve 27 are connected to the second cooler 17, the second ball valve 28 is used to control the flow of the cooling medium in the second cooler 17, and the second shut-off valve 27 is used to adjust the throttling of the cooling medium in the second cooler 17.

[0077] Understandably, the above settings are intended to ensure that the gas temperature and pressure at the air inlet of the expansion end 3 meet the test requirements, and to adjust the opening of the second valve 12 and the second shut-off valve 27 in a timely manner according to these two thermal states.

[0078] like Figure 1 As shown, in some embodiments of the present invention, the second cooling module further includes a fourth valve 20; the fourth valve 20 is connected in series between the outlet of the second cooler 17 and the outlet of the test device to release the gas that has completed its work.

[0079] In a preferred embodiment of the present invention, a back pressure regulating valve can be used as the fourth valve 20. The back pressure regulating valve can adjust the flow rate of the air outlet after the air compressor has been running stably, thereby simulating the operating environment of the air compressor under varying operating conditions, so as to measure the performance parameters of the air compressor under different speeds and different outlet pressures. Then, based on these test data, the performance curve of the tested air compressor can be plotted, and the safe and efficient operating range of the tested air compressor can be calibrated.

[0080] like Figure 1As shown, in some embodiments of the present invention, the second cooling module further includes an anti-surge valve 21; the anti-surge valve 21 is connected in series between the outlet of the second cooler 17 and the inlet of the compression end 1, or between the outlet of the second cooler 17 and the outlet of the test device. Specifically, when the air compressor is running in the pre-surge range, the anti-surge valve 21 actuates in a timely manner to guide some of the gas back to the compression end 1 or guide it to be released to the outside of the test device, so as to prevent damage to the air compressor and thus ensure the safety and reliability of the entire test device.

[0081] It is worth noting that when the anti-surge valve 21 is configured to be connected in series between the outlet of the second cooler 17 and the inlet of the compression end 1, when the air compressor is in the pre-surge zone, the anti-surge valve 21 starts to operate, causing part of the exhaust from the expansion end 3 to return to the compression end 1, thereby increasing the inlet flow of the compression end 1, so that the air compressor as a whole can quickly leave the surge zone, so as to avoid the surge phenomenon and the damage it may cause to the air compressor.

[0082] In some embodiments of the present invention, the anti-surge valve 21 is connected in series between the outlet of the second cooler 17 and the outlet of the test device via a first pipeline (not shown), and the fourth valve 20 is connected in series between the outlet of the second cooler 17 and the outlet of the test device via a second pipeline (not shown), and the first pipeline and the second pipeline are independent of each other.

[0083] like Figure 1 As shown, in some embodiments of the present invention, the testing device further includes a third cooling module (unlabeled); the motor 2 is connected in series in the third cooling module, and the third cooling module is used to cool the motor 2.

[0084] like Figure 1 As shown, in some embodiments of the present invention, the third cooling module includes a sixth valve 22 and a seventh valve 23; the sixth valve 22 is connected in series between the motor 2 and the liquid outlet of a cooling device (not shown), and the seventh valve 23 is connected in series between the liquid inlet of the cooling device, the cooling device being used to provide a cooling medium for the motor 2.

[0085] like Figure 1As shown, in some embodiments of the present invention, the third cooling module further includes a fourth temperature sensor 24 and a fourth flow meter 25; both the fourth temperature sensor 24 and the fourth flow meter 25 are connected in series between the motor 2 and the cooling equipment; the fourth temperature sensor 24 is used to monitor the temperature of the cooling medium provided by the cooling equipment, and the fourth flow meter 25 is used to monitor the flow rate of the cooling medium provided by the cooling equipment. Furthermore, the fourth temperature sensor 24 and the fourth flow meter 25 can also monitor whether the motor 2 has experienced abnormal temperature, enabling operators to quickly identify and address problems to avoid potential safety hazards.

[0086] like Figure 1 As shown, in some embodiments of the present invention, the testing device further includes a temperature gauge 29, allowing operators to monitor airflow issues in real time and on-site, in order to fully understand and control the operation of the testing device and the air compressor. Figure 1 As shown, in some embodiments of the present invention, the temperature gauge 29 may be connected in series between the third temperature sensor 19 and the second cooler 17, so that the operator can monitor the temperature of the gas leaving the expansion end 3 and about to enter the second cooler 17 in real time. In some embodiments of the present invention, the temperature gauge 29 may also be connected in series between the first valve 7 and the compression end 1, so that the operator can monitor the temperature of the gas about to enter the compression end 1 in real time.

[0087] It is worth noting that the cooler and various regulating valves in the testing device for testing air compressors provided by this invention have a wide adjustable range, thus enabling a safe, fast, and accurate comprehensive and detailed evaluation of the overall performance of air compressors under different flow rates, temperatures, and pressures, in order to explore the optimal operating range of the air compressor.

[0088] In some embodiments of the present invention, the air compressor can be an air compressor used in a fuel cell system. The testing device provided by the present invention enables performance evaluation and calibration of a fuel cell air compressor with exhaust gas turbine expansion, simulating the actual air consumption of a fuel cell system, shortening the development cycle, and controlling development costs. Specifically, during the actual operation of a fuel cell system, high-pressure air consumes some oxygen after passing through the fuel cell proton exchange membrane, and the pressure, temperature, and flow rate of the airflow decrease. Therefore, the present invention uses the aforementioned cooler and various regulating valves to control the parameters of the gas flow rate, temperature, and pressure entering the expansion end, thereby simulating the work done at the expansion end of the fuel cell system under different operating conditions. Therefore, the testing device provided by the present invention can provide experimental data to evaluate the exhaust gas recovery capacity of the air compressor's expansion end in the fuel cell system, and can also simulate the air consumption and utilization of the fuel cell system. The testing device for testing air compressors provided by the present invention provides necessary reference experimental data for evaluating the performance of fuel cell air compressors and simulating the actual air consumption of fuel cells.

[0089] Furthermore, the testing device for testing air compressors provided by this invention has the advantages of low cost and the ability to replace and adjust components such as pipes and flanges according to different models and specifications of air compressors. In other words, the testing device provided by this invention has good versatility, thereby reducing the cost of performance simulation tests for various air compressors.

[0090] It is worth mentioning that some existing air compressor performance testing devices can only control the amount of cooling water between compressor stages, thereby controlling the working fluid temperature at the compressor's secondary inlet. However, the testing device provided by this invention, by incorporating pressure sensors, flow meters, and various valves for controlling gas pressure and flow, achieves both controllable and adjustable heating and cooling, as well as controllable and adjustable gas pressure and flow. Therefore, the testing device provided by this invention can more accurately and comprehensively simulate the real operating conditions of air compressors with integrated prime mover or energy recovery functions, thereby obtaining more accurate and usable test data to provide necessary data references for the optimized design of air compressors.

[0091] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of the present invention. The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention, and the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A testing apparatus for testing an air compressor, the air compressor comprising a compression end, a motor, and an expansion end connected in sequence, characterized in that, The testing apparatus includes: A gas supply module is connected in series between the air inlet of the test device and the air inlet of the compression end. The gas supply module includes a third ball valve, which is used to deliver gas located outside the test device to the compression end under negative pressure to simulate the actual air intake conditions of the fuel cell air compressor. A first cooling module is connected in series between the outlet of the compression end and the inlet of the expansion end, used to cool the gas compressed and pressurized by the compression end and deliver it to the expansion end; wherein, the first cooling module includes a first cooler, a second valve and a third valve, the first cooler is used to cool the gas compressed and pressurized by the compression end, the outlet of the compression end, the first cooler, the second valve and the inlet of the expansion end are connected in series in sequence, the first cooler, the third valve and the outlet of the test device are connected in series in sequence; by adjusting the opening of the second valve and the third valve, the gas flow rate entering the expansion end and the gas flow rate exiting through the third valve are controlled to simulate the air consumption and utilization of the fuel cell system; The second cooling module is connected in series between the outlet of the expansion end and the outlet of the testing device, and is used to cool the gas leaving the expansion end and discharge it outside the testing device. The second cooling module includes a second cooler, a fourth valve, and an anti-surge valve. The second cooler is connected in series between the outlet of the expansion end and the outlet of the testing device. The fourth valve is a back pressure regulating valve, which is connected in series between the outlet of the second cooler and the inlet of the compression end via a first pipe. Alternatively, it can be connected in series between the outlet of the second cooler and the outlet of the testing device. The first pipe and the second pipe are independent of each other.

2. The test device of claim 1, wherein, The gas supply module includes a first flow meter, a first pressure sensor, and a first temperature sensor; The first flow meter, the first pressure sensor, and the first temperature sensor are all connected in series between the air inlet of the test device and the air inlet of the compression end; The first flow meter is used to monitor the flow rate of gas entering the compression end from outside the test device; The first pressure sensor is used to monitor the pressure of the gas entering the compression end from outside the test device; The first temperature sensor is used to monitor the temperature of the gas entering the compression end from outside the test device.

3. The test device of claim 1, wherein, The gas supply module includes a first valve; The first valve is connected in series between the air inlet of the test device and the air inlet of the compression end; The first valve is used to control the gas located outside the test device from entering the test device.

4. The test device of claim 3, wherein, The gas supply module includes a filter; The filter is connected in series between the first valve and the air inlet of the compression end, and is used to filter impurities in the gas entering the gas supply module from outside the test device; The third ball valve is connected in series between the first valve and the filter, and is used to allow gas located outside the test device to enter the compression end under negative pressure.

5. The test device of claim 1, wherein, The first cooling module also includes a first ball valve and a first shut-off valve; Both the first ball valve and the first shut-off valve are connected to the first cooler. The first ball valve is used to control the flow of the cooling medium in the first cooler, and the first shut-off valve is used to adjust the throttling of the cooling medium in the first cooler.

6. The test device of claim 1, wherein, The first cooling module also includes a second pressure sensor, a second temperature sensor, and a second flow meter; The second pressure sensor and the second temperature sensor are both connected in series between the second valve and the outlet of the expansion end. The second pressure sensor is used to monitor the pressure of the gas entering the expansion end, and the second temperature sensor is used to monitor the temperature of the gas entering the expansion end. The second flow meter is connected in series between the first cooler and the third valve, and the second flow meter is used to monitor the flow rate of gas passing through the third valve.

7. The test device of claim 1, wherein, The second cooling module also includes a third pressure sensor and a third temperature sensor; The third pressure sensor and the third temperature sensor are both connected in series between the air outlet of the expansion end and the air inlet of the second cooler. The third pressure sensor is used to monitor the pressure of the gas leaving the expansion end; The third temperature sensor is used to monitor the temperature of the gas leaving the expansion end.

8. The test device of claim 1, wherein, The second cooling module also includes a second ball valve and a second shut-off valve; The second ball valve and the second shut-off valve are both connected to the second cooler. The second ball valve is used to control the flow of the cooling medium in the second cooler, and the second shut-off valve is used to regulate the throttling of the cooling medium in the second cooler.

9. The test device of claim 1, wherein, The testing device also includes a third cooling module; The motor is connected in series in the third cooling module, which is used to cool the motor.

10. The test device of claim 9, wherein, The third cooling module includes a sixth valve and a seventh valve; The sixth valve is connected in series between the motor and the liquid outlet of a cooling device, and the seventh valve is connected in series between the liquid inlet of the cooling device. The cooling device is used to provide cooling medium for the motor.

11. The test device of claim 10, wherein, The third cooling module also includes a fourth temperature sensor and a fourth flow meter; The fourth temperature sensor and the fourth flow meter are both connected in series between the motor and the cooling equipment; The fourth temperature sensor is used to monitor the temperature of the cooling medium provided by the cooling equipment, and the fourth flow meter is used to monitor the flow rate of the cooling medium provided by the cooling equipment.

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