Oxygen supply system testing device

Abstract

The invention discloses an oxygen supply system testing device which comprises a dry side gas supply structure, a wet side gas supply structure and a gas detection module. The dry side air supply structure can supply dry air, and the dry side air supply structure, the compression inlet, the compression outlet, the humidifying dry side inlet and the humidifying dry side outlet are sequentially connected; the wet side air supply structure can supply wet air, and the wet side air supply structure, the humidifying wet side inlet, the humidifying wet side outlet, the expansion inlet and the expansion outlet are sequentially connected. The gas detection module is used for detecting parameters of gas flowing through the humidifier, the compressor and the expansion machine. Therefore, the humidifier, the compressor and the expansion machine can be tested together by using the same device under the condition that equipment is not plugged and unplugged, so that the equipment redundancy is reduced, the function integration degree is relatively high, and the test time consumption is short.

Description

Technical Field

[0001] The invention relates to the field of fuel cell systems, and in particular to an oxygen supply system testing device. Background Art

[0002] In the prior art, the fuel cell system includes an oxygen supply system, which provides the fuel cell stack with compressed air required for the reaction and maintains the temperature, pressure and humidity of the supplied air within the range required by the fuel cell stack. The oxygen supply system consists of an air filter, an air compressor, an intercooler, a humidifier, a throttle valve and other auxiliary pipelines.

[0003] In the oxygen supply system, the power consumption of the air compressor accounts for a large proportion. In order to improve the efficiency of the fuel cell system, reducing the power consumption of the air compressor is a better idea. Therefore, more and more oxygen supply systems use energy recovery air compressors. The energy recovery air compressor includes a connected compressor and an expander, which are located at the two ends of the connection: the compressor compresses the gas to provide the fuel cell system with the compressed gas required for the reaction; the expander mainly recycles the kinetic energy and thermal energy of the exhaust gas discharged from the system. In this way, the power consumption of the fuel cell system is greatly reduced.

[0004] For energy recovery air compressors, multiple tests are required, such as providing dry air to the compressor to test the effect of gas compression, and providing wet air (simulating the exhaust gas of the system) to the expander to test the effect of the expander in recycling the exhaust gas; for other parts of the oxygen supply system, especially the humidifier, corresponding gases can also be injected to test its function. The current test device usually only tests single components, and cannot place the entire fuel cell system in the same device for testing. This has a low functional integration, a long test time, and causes equipment redundancy in the test device, wasting unnecessary costs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an oxygen supply system testing device in order to overcome the defect that the testing device for the oxygen supply system in the prior art is only for single components.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] An oxygen supply system testing device, which is used to test a humidifier, a compressor and an expander, wherein the humidifier comprises a humidification dry side inlet, a humidification dry side outlet, a humidification wet side inlet and a humidification wet side outlet, the compressor comprises a compression inlet and a compression outlet, and the expander comprises an expansion inlet and an expansion outlet;

[0008] The oxygen supply system testing device comprises a dry-side air supply structure, a wet-side air supply structure, and a gas detection module;

[0009] The dry side air supply structure is capable of supplying dry air, and the dry side air supply structure, the compression inlet, the compression outlet, the humidification dry side inlet, and the humidification dry side outlet are connected in sequence;

[0010] The wet side air supply structure is capable of supplying humid air, and the wet side air supply structure, the humidification wet side inlet, the humidification wet side outlet, the expansion inlet, and the expansion outlet are connected in sequence;

[0011] The gas detection module is used to detect gas parameters flowing through the humidifier, the compressor and the expander respectively.

[0012] In the present technical solution, by providing the oxygen supply system test device, the humidifier, compressor and expander can be tested together with the same device without plugging and unplugging the equipment, thereby reducing equipment redundancy. Specifically, after the rod-side air supply structure is turned on, dry air can pass through the compressor and humidifier connected in series; after the wet-side air supply structure is turned on, wet air can pass through the humidifier and expander connected in series; and it conforms to the normal gas operation sequence of the oxygen supply system. The gas detection module can be used to obtain the gas parameters flowing through the humidifier, compressor and expander respectively, so that the functional integration is high and the test time is short.

[0013] Preferably, the oxygen supply system testing device further comprises a humidification dry side short pipe, the two ends of which are detachably connected to the humidification dry side inlet and the humidification dry side outlet, respectively; and / or,

[0014] The oxygen supply system testing device further comprises a humidification wet side short pipe, the two ends of which are detachably connected to the humidification wet side inlet and the humidification wet side outlet, respectively; and / or,

[0015] The oxygen supply system testing device also includes a humidifying dry side air intake pipeline and a humidifying dry side air intake heat dissipation structure. The humidifying dry side air intake pipeline connects the compression outlet and the humidifying dry side inlet, and the humidifying dry side air intake heat dissipation structure is arranged on the humidifying dry side air intake pipeline.

[0016] In the present technical solution, by setting a humidifier dry side short pipe, when the humidifier is not tested, dry air can bypass the internal structure of the humidifier from the humidifier dry side short pipe, so that the path of the dry air can be adjusted by plugging and unplugging a single pipe. The adjustment method is simple, and the problem of interface air tightness caused by multiple plugging and unplugging can be avoided in complex parts. By setting a humidifier wet side short pipe, when the humidifier is not tested, humid air can bypass the internal structure of the humidifier from the humidifier wet side short pipe. By setting a humidifier dry side air intake pipeline and a humidifier dry side air intake heat dissipation structure, it can be avoided that after the dry air passes through the compressor, the pressurization process during air compression and the high air flow rate will cause the air temperature to rise, resulting in excessive heat of the air entering the humidifier dry side inlet and damage to the structure of the humidifier.

[0017] Preferably, the gas detection module is used to detect gas parameters at the compression inlet, the compression outlet, the humidification dry side inlet, the humidification dry side outlet, the humidification wet side inlet, the humidification wet side outlet, the expansion inlet, and the expansion outlet.

[0018] In the present technical solution, through the above settings, the gas parameters at each inlet and outlet can be obtained through the gas detection module so as to calculate and compare to obtain the test results.

[0019] Preferably, the gas detection module comprises a pressure sensor and a temperature sensor.

[0020] In the present technical solution, by providing a gas detection module including a pressure sensor and a temperature sensor, the gas pressure and gas temperature at each inlet and outlet can be directly acquired, which is convenient for calculation and comparison.

[0021] Preferably, the oxygen supply system testing device further comprises a first circulation pipe, wherein the first circulation pipe connects the expansion outlet and the compression inlet.

[0022] In the present technical solution, through the above arrangement, the gas after separation of gas and liquid by the expander can be injected into the compression inlet of the compressor, thereby further reducing the gas supply of the dry side gas supply structure, saving energy consumption and reducing testing costs.

[0023] Preferably, the oxygen supply system testing device further comprises a first circulation heat dissipation structure, and the first circulation heat dissipation structure is located on the first circulation pipe.

[0024] In the present technical solution, through the above settings, when the expander is not working well, the heat in the gas can be further released, thereby controlling the temperature of the gas entering the compressor to be within a reasonable range, avoiding abnormal increase in gas temperature and damaging the structure of the compressor.

[0025] Preferably, the oxygen supply system testing device further comprises a second circulation pipe, wherein the second circulation pipe connects the compression outlet and the expansion inlet.

[0026] In this technical solution, through the above arrangement, the dry air compressed by the compressor can be partially introduced to the expansion inlet of the expander without being restricted by the flow rate of the humidifier, thereby further reducing the air supply volume of the wet side air supply structure, saving energy consumption, and reducing the test cost.

[0027] Preferably, the oxygen supply system testing device further comprises a throttle valve, and the throttle valve is located on the second circulation pipe.

[0028] In the present technical solution, through the above arrangement, the opening percentage of the throttle valve can be adjusted to control the flow of dry air introduced to the expansion inlet, thereby achieving simple adjustment.

[0029] Preferably, the oxygen supply system testing device further comprises a total humidification wet gas supply pipeline, a wet side air supply pipeline and a steam supply pipeline;

[0030] The wet side air supply structure comprises a wet side air supply module and a steam supply module, wherein the wet side air supply module can supply dry air, and the steam supply module can supply water vapor;

[0031] One end of the wet side air supply pipeline, one end of the steam supply pipeline, and one end of the total humidification moisture supply pipeline are all connected, and the other end of the wet side air supply pipeline, the other end of the steam supply pipeline, and the other end of the total humidification moisture supply pipeline are respectively connected to the wet side air supply module, the steam supply module, and the humidification wet side inlet.

[0032] In the present technical solution, through the above arrangement, humid air can be supplied with a relatively simple structure, and the humidity range of the humid air can be adjusted conveniently.

[0033] Preferably, the oxygen supply system testing device further comprises a humidifying dry side air outlet pipeline, a humidifying dry side air outlet end, and a third circulation pipe, wherein the humidifying dry side outlet, the humidifying dry side air outlet pipeline, and the humidifying dry side air outlet end are connected in sequence, and the third circulation pipe connects the humidifying dry side air outlet pipeline and the wet side air supply pipeline; and / or,

[0034] A sight glass is provided on the total humidification moisture supply pipeline, and the sight glass is used to observe the condensation of water vapor in the total humidification moisture supply pipeline.

[0035] In this technical solution, by setting a humidified dry side air outlet pipeline, a humidified dry side air outlet end, and a third circulation pipe, the dry air passing through the humidifier can be recycled to the position before the steam supply module supplies water vapor, so that the recycled dry air and the dry air provided by the wet side air supply module are uniformly mixed with water vapor, and the air supply volume of the wet side air supply module is reduced without affecting the humidity range of the wet air, saving energy consumption and reducing testing costs. By setting a viewing disk, it is possible to timely observe whether the dry air and water vapor are mixed well before the wet air enters the humidifier and the expander, so as to avoid the condensed water droplets generated during the mixing from causing damage to the internal structure of the expander.

[0036] The positive and progressive effects of the present invention are:

[0037] By providing the oxygen supply system test device, the humidifier, compressor and expander (the latter two are the two main structures of the energy recovery air compressor) can be tested together with the same device without plugging and unplugging the equipment, reducing equipment redundancy. Specifically, after the rod-side air supply structure is turned on, dry air can pass through the compressor and humidifier connected in series; after the wet-side air supply structure is turned on, wet air can pass through the humidifier and expander connected in series; and it conforms to the normal gas operation sequence of the oxygen supply system. The gas detection module can be used to obtain the gas parameters flowing through the humidifier, the compressor and the expander respectively, so that the functional integration is high and the test time is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the structure of an oxygen supply system testing device according to an embodiment of the present invention.

[0039] Figure 2 for Figure 1 A partial schematic diagram of .

[0040] Figure 3 for Figure 1 Partial schematic diagram of B.

[0041] Figure 4 for Figure 1 Partial schematic diagram of C.

[0042] Figure 5 for Figure 1 Partial schematic diagram of D.

[0043] Description of reference numerals:

[0044] Humidifier 1

[0045] Humidification dry side inlet Di

[0046] Humidification dry side outlet Do

[0047] Humidification wet side inlet Wi

[0048] Humidification wet side outlet Wo

[0049] Compressor 2

[0050] Expander 3

[0051] Dry side air supply structure 41

[0052] Wet side air supply module 421

[0053] Steam Supply Module 422

[0054] Humidification dry side intake line 431

[0055] Humidification dry side air intake cooling structure 432

[0056] First circulation pipe 441

[0057] First cycle heat dissipation structure 442

[0058] Expansion outlet pipe 451

[0059] Second circulation pipe 461

[0060] Total humidification moisture supply pipeline 471

[0061] Wet side air supply line 472

[0062] Steam supply line 473

[0063] Humidification dry side outlet pipe 481

[0064] Humidification dry side outlet 482

[0065] The third circulation pipe 483

[0066] Videodisc 484

[0067] First pressure sensor P1

[0068] Second pressure sensor P2

[0069] The third pressure sensor P3

[0070] The first temperature sensor T1

[0071] The second temperature sensor T2

[0072] The third temperature sensor T3

[0073] First humidity sensor H1

[0074] First throttle valve TV1

[0075] Second throttle valve TV2 DETAILED DESCRIPTION

[0076] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0077] like Figure 1-Figure 5 As shown, this embodiment provides an oxygen supply system testing device, which is used to test a humidifier 1, a compressor 2 and an expander 3. The humidifier 1 includes a humidifying dry side inlet Di, a humidifying dry side outlet Do, a humidifying wet side inlet Wi, and a humidifying wet side outlet Wo. The compressor 2 includes a compression inlet and a compression outlet. The expander 3 includes an expansion inlet and an expansion outlet.

[0078] The oxygen supply system test device comprises a dry-side air supply structure 41, a wet-side air supply structure, and a gas detection module.

[0079] The dry side air supply structure 41 can supply dry air, and the dry side air supply structure 41, the compression inlet, the compression outlet, the humidification dry side inlet Di, and the humidification dry side outlet Do are connected in sequence.

[0080] The wet side air supply structure can supply humid air, and the wet side air supply structure, the humidification wet side inlet Wi, the humidification wet side outlet Wo, the expansion inlet, and the expansion outlet are connected in sequence.

[0081] In this way, the humidifier 1, compressor 2 and expander 3 (the latter two are the two main structures of the energy recovery air compressor) can be tested together with the same device without plugging and unplugging the equipment, reducing equipment redundancy. Specifically, after the rod-side air supply structure is turned on, dry air can pass through the compressor 2 and humidifier 1 connected in series; after the wet-side air supply structure is turned on, wet air can pass through the humidifier 1 and expander 3 connected in series; and it conforms to the normal gas operation sequence of the oxygen supply system. The gas detection module can obtain the gas parameters at each inlet and outlet, so as to calculate and compare the test results, so that the functional integration is high and the test time is short.

[0082] Specifically in this embodiment, the gas detection module is used to detect the gas parameters at the compression inlet, compression outlet, humidification dry side inlet Di, humidification dry side outlet Do, humidification wet side inlet Wi, humidification wet side outlet Wo, expansion inlet, and expansion outlet, so as to calculate and compare the test results. Of course, the specific position setting of the above-mentioned gas detection module is only one of the specific implementation plans for realizing the detection of gas parameters flowing through the humidifier 1, the compressor 2 and the expander 3 in this embodiment. In other embodiments, the gas detection module can also be set at other pipeline interface positions of the humidifier 1, the compressor 2 and the expander 3 to achieve the purpose of detecting the gas parameters flowing through the humidifier 1, the compressor 2 and the expander 3.

[0083] In this embodiment, the oxygen supply system test device further includes a humidifying dry side short pipe (not shown in the figure), and the two ends of the humidifying dry side short pipe are detachably connected to the humidifying dry side inlet Di and the humidifying dry side outlet Do, respectively. In this way, when the humidifier 1 is not tested, the dry air can bypass the internal structure of the humidifier 1 from the humidifying dry side short pipe, so that the path of the dry air can be adjusted by plugging and unplugging a single pipe, and the adjustment method is simple, avoiding the interface air tightness problem caused by multiple plugging and unplugging in the complex part.

[0084] In this embodiment, the oxygen supply system test device further includes a humidification wet side short pipe (not shown in the figure), and the two ends of the humidification wet side short pipe are detachably connected to the humidification wet side inlet Wi and the humidification wet side outlet Wo, respectively. In this way, when the humidifier 1 is not tested, the humidified air can bypass the internal structure of the humidifier 1 from the humidification wet side short pipe, so that the path of the humidified air can be adjusted by plugging and unplugging a single pipe, and the adjustment method is simple, avoiding the interface air tightness problem caused by multiple plugging and unplugging in the complex part.

[0085] See also Figure 2 In this embodiment, the oxygen supply system test device further includes a humidifying dry side air intake pipeline 431 and a humidifying dry side air intake heat dissipation structure 432. The humidifying dry side air intake pipeline 431 connects the compression outlet and the humidifying dry side inlet Di, and the humidifying dry side air intake heat dissipation structure is arranged on the humidifying dry side air intake pipeline 431. In this way, it can be avoided that after the dry air passes through the compressor 2, the pressurization process during air compression and the high air flow rate will increase the air temperature, resulting in excessive heat of the air entering the humidifying dry side inlet and damage to the structure of the humidifier 1.

[0086] In this embodiment, the gas detection module includes a pressure sensor and a temperature sensor. In this way, the gas pressure and gas temperature at each inlet and outlet can be directly obtained, which is convenient for calculation and comparison. Figure 2 In the embodiment, a first pressure sensor P1 and a first temperature sensor T1 are arranged before the compression inlet, and a second pressure sensor P2 and a second temperature sensor T2 are arranged after the compression outlet.

[0087] In this embodiment, the gas detection module may further include a humidity sensor, such as a third pressure sensor P3, a third temperature sensor T3 and a first humidity sensor H1 arranged before the humidification dry side inlet Di. The selection of each sensor refers to existing technology and national standards.

[0088] In this embodiment, the oxygen supply system test device further includes a first circulation pipe 441, which connects the expansion outlet and the compression inlet. In this way, the gas separated from the gas and liquid by the expander 3 can be injected into the compression inlet of the compressor 2, thereby further reducing the gas supply of the dry side gas supply structure 41, saving energy consumption and reducing the test cost.

[0089] In this embodiment, the oxygen supply system test device further includes a first circulation heat dissipation structure 442, which is located on the first circulation pipe 441. In this way, when the expander 3 is not working well, the heat in the gas can be further guaranteed to be released, so as to control the temperature of the gas entering the compressor 2 to be within a reasonable range, and avoid the abnormal increase of the gas temperature to damage the structure of the compressor 2.

[0090] In this embodiment, the oxygen supply system test device further includes a first throttle valve TV1, which is arranged at the rear end of the expansion outlet pipe 451 of the expander 3. In this way, the opening percentage of the first throttle valve TV1 can be adjusted to control the discharge amount of the gas after the gas and liquid are separated by the expander 3, so as to achieve simple adjustment. The settings of other gas discharge parts refer to the existing technology and national standards.

[0091] In this embodiment, the oxygen supply system test device further includes a second circulation pipe 461, which connects the compression outlet and the expansion inlet. In this way, the dry air compressed by the compressor 2 can be partially led to the expansion inlet of the expander 3 without being restricted by the flow rate of the humidifier 1. This further reduces the air supply volume of the wet side air supply structure, saves energy consumption, and reduces the test cost.

[0092] In this embodiment, the oxygen supply system test device further includes a second throttle valve TV2, which is located on the second circulation pipe 461. In this way, the opening percentage of the second throttle valve TV2 can be adjusted to control the flow of dry air introduced to the expansion inlet, thereby achieving simple adjustment.

[0093] See also Figure 3 In this embodiment, the oxygen supply system testing device also includes a total humidification air supply pipeline 471, a wet side air supply pipeline 472 and a steam supply pipeline 473.

[0094] See also Figure 4 , Figure 5 The wet side air supply structure includes a wet side air supply module 421 and a steam supply module 422. The wet side air supply module 421 can supply dry air, and the steam supply module 422 can supply water vapor.

[0095] One end of the wet side air supply pipeline 472, one end of the steam supply pipeline 473, and one end of the total humidification moisture supply pipeline 471 are all connected, and the other end of the wet side air supply pipeline 472, the other end of the steam supply pipeline 473, and the other end of the total humidification moisture supply pipeline 471 are respectively connected to the wet side air supply module 421, the steam supply module 422, and the humidification wet side inlet Wi.

[0096] In this way, the humid air can be supplied with a relatively simple structure, and the humidity range of the humid air can be easily adjusted.

[0097] In this embodiment, the oxygen supply system testing device also includes a humidifying dry side air outlet pipeline 481, a humidifying dry side air outlet end 482, and a third circulation pipe 483; the humidifying dry side outlet Do, the humidifying dry side air outlet pipeline 481, and the humidifying dry side air outlet end 482 are connected in sequence; the third circulation pipe 483 connects the humidifying dry side air outlet pipeline 481 and the wet side air supply pipeline 472.

[0098] In this way, the dry air passing through the humidifier 1 can be recovered to the position before the steam supply module 422 supplies water vapor, so that the recovered dry air and the dry air provided by the wet side air supply module 421 are uniformly mixed with water vapor. Without affecting the humidity range of the wet air, the air supply volume of the wet side air supply module 421 is reduced, energy consumption is saved, and testing costs are reduced.

[0099] In this embodiment, a viewing disk 484 is provided on the total humidification moisture supply pipeline 471, and the viewing disk 484 is used to observe the condensation of water vapor in the total humidification moisture supply pipeline 471. Considering that there are high-speed blades inside the expander 3, it is easy to cause damage when condensed water drops hit the blades, and the humidity sensor can only detect humidity and it is difficult to monitor the generation of condensed water drops. Before the humid air enters the humidifier 1 and the expander 3, the user can timely observe whether the dry air and water vapor are mixed well at the viewing disk 484 to avoid the condensed water drops generated during the mixing causing damage to the internal structure of the expander 3.

[0100] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An oxygen supply system testing device, which is used to test a humidifier, a compressor and an expander, wherein the humidifier comprises a humidifying dry side inlet, a humidifying dry side outlet, a humidifying wet side inlet, and a humidifying wet side outlet, the compressor comprises a compression inlet and a compression outlet, and the expander comprises an expansion inlet and an expansion outlet; characterized in that: The oxygen supply system testing device comprises a dry-side air supply structure, a wet-side air supply structure, and a gas detection module; The dry side air supply structure is capable of supplying dry air, and the dry side air supply structure, the compression inlet, the compression outlet, the humidification dry side inlet, and the humidification dry side outlet are connected in sequence; The wet side air supply structure is capable of supplying humid air, and the wet side air supply structure, the humidification wet side inlet, the humidification wet side outlet, the expansion inlet, and the expansion outlet are connected in sequence; The gas detection module is used to detect gas parameters flowing through the humidifier, the compressor and the expander respectively.

2. The oxygen supply system testing device according to claim 1, characterized in that: The oxygen supply system testing device further comprises a humidifying dry side short pipe, the two ends of which are detachably connected to the humidifying dry side inlet and the humidifying dry side outlet respectively; and / or, The oxygen supply system testing device further comprises a humidification wet side short pipe, the two ends of which are detachably connected to the humidification wet side inlet and the humidification wet side outlet, respectively; and / or, The oxygen supply system testing device also includes a humidifying dry side air intake pipeline and a humidifying dry side air intake heat dissipation structure. The humidifying dry side air intake pipeline connects the compression outlet and the humidifying dry side inlet, and the humidifying dry side air intake heat dissipation structure is arranged on the humidifying dry side air intake pipeline.

3. The oxygen supply system testing device according to claim 1, characterized in that: The gas detection module is used to detect gas parameters at the compression inlet, the compression outlet, the humidification dry side inlet, the humidification dry side outlet, the humidification wet side inlet, the humidification wet side outlet, the expansion inlet, and the expansion outlet.

4. The oxygen supply system testing device according to claim 3, characterized in that: The gas detection module includes a pressure sensor and a temperature sensor.

5. The oxygen supply system testing device according to claim 1, characterized in that: The oxygen supply system testing device further includes a first circulation pipe, which connects the expansion outlet and the compression inlet.

6. The oxygen supply system testing device according to claim 5, characterized in that: The oxygen supply system testing device further includes a first circulation heat dissipation structure, and the first circulation heat dissipation structure is located on the first circulation pipe.

7. The oxygen supply system testing device according to claim 1, characterized in that: The oxygen supply system testing device further includes a second circulation pipe, which connects the compression outlet and the expansion inlet.

8. The oxygen supply system testing device according to claim 7, characterized in that: The oxygen supply system testing device further comprises a throttle valve, and the throttle valve is located on the second circulation pipe.

9. The oxygen supply system testing device according to claim 1, characterized in that: The oxygen supply system testing device also includes a total humidification wet gas supply pipeline, a wet side air supply pipeline and a steam supply pipeline; The wet side air supply structure comprises a wet side air supply module and a steam supply module, wherein the wet side air supply module can supply dry air, and the steam supply module can supply water vapor; One end of the wet side air supply pipeline, one end of the steam supply pipeline, and one end of the total humidification moisture supply pipeline are all connected, and the other end of the wet side air supply pipeline, the other end of the steam supply pipeline, and the other end of the total humidification moisture supply pipeline are respectively connected to the wet side air supply module, the steam supply module, and the humidification wet side inlet.

10. The oxygen supply system testing device according to claim 9, characterized in that: The oxygen supply system testing device further comprises a humidifying dry side air outlet pipeline, a humidifying dry side air outlet end, and a third circulation pipe, wherein the humidifying dry side outlet, the humidifying dry side air outlet pipeline, and the humidifying dry side air outlet end are connected in sequence, and the third circulation pipe connects the humidifying dry side air outlet pipeline and the wet side air supply pipeline; and / or, A sight glass is provided on the total humidification moisture supply pipeline, and the sight glass is used to observe the condensation of water vapor in the total humidification moisture supply pipeline.

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