Humidifier testing apparatus and humidifier testing method

Abstract

This invention discloses a humidifier testing device and a humidifier testing method, applied to the humidifier testing of fuel cell engines. The humidifier includes a moisture inlet, a moisture outlet, a dry air inlet, and a dry air outlet. The first air path of the humidifier testing device includes a first air compressor, a first heat exchanger, a pressure-resistant water tank, a pressure-resistant heated water tank, and a sixth heat exchanger connected sequentially by pipes. External air flows sequentially through the first air compressor, the first heat exchanger, the pressure-resistant water tank, and the pressure-resistant heated water tank before entering the sixth heat exchanger. The outlet of the first heat exchanger is connected to the bottom of the water surface inside the pressure-resistant water tank, and the outlet of the sixth heat exchanger is connected to the moisture inlet. The second air path includes a second air compressor, a second heat exchanger, and a seventh heat exchanger connected sequentially by pipes. External air flows sequentially through the second air compressor and the second heat exchanger before entering the seventh heat exchanger, and the outlet of the seventh heat exchanger is connected to the dry air inlet.

Description

Technical Field

[0001] This invention relates to the field of fuel cells, and more particularly to a humidifier testing device and a humidifier testing method. Background Technology

[0002] As hydrogen fuel cells are an emerging environmentally friendly industry, my country's fuel cell vehicle development has entered the introductory phase. Currently, the entire industry is market-oriented, and fuel cell vehicles are about to be widely deployed. The demand and application scenarios for upstream key components are gradually becoming clearer. The application environment of fuel cell engines is highly variable, and the operating environment of components must meet or even exceed the requirements of the fuel cell engine environment. For example, humidifiers for fuel cell engines face significant technical challenges, requiring us to overcome technical difficulties one by one. Humidifiers for fuel cell engines are currently in the development stage, thus requiring simulation of the fuel cell engine's operating environment to achieve practical application scenarios. However, there are virtually no testing systems in the industry capable of simulating such environments, and the entire industry has virtually no experience in this area. Therefore, testing humidifiers for fuel cell systems is difficult and urgently needs to be addressed. Current industry testing methods are basically limited to Roots machines and two-stage centrifuges. However, the application scenario requirements of fuel cell generators for humidifiers are imminent. Therefore, developing testing methods and experimental platforms suitable for humidifier systems used in fuel cell engines is equally urgent and difficult to achieve. Summary of the Invention

[0003] This invention provides a humidifier testing device and a humidifier testing method, which simulates a testing environment suitable for humidifiers used in fuel cell engines, so as to conduct more effective testing of humidifiers.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An embodiment of the first aspect of this application discloses a humidifier testing device for use in fuel cell engine humidifier testing. The humidifier includes a moisture inlet, a moisture outlet, a dry air inlet, and a dry air outlet. The humidifier testing device includes a first air path and a second air path. The first air path includes a first air compressor, a first heat exchanger, a pressure-resistant water tank, a pressure-resistant heated water tank, and a sixth heat exchanger connected sequentially by pipes. External air flows sequentially through the first air compressor, the first heat exchanger, the pressure-resistant water tank, and the pressure-resistant heated water tank before entering the sixth heat exchanger. The outlet of the first heat exchanger is connected to the bottom of the water surface inside the pressure-resistant water tank, and the outlet of the sixth heat exchanger is connected to the moisture inlet. The second air path includes a second air compressor, a second heat exchanger, and a seventh heat exchanger connected sequentially by pipes. External air flows sequentially through the second air compressor and the second heat exchanger before entering the seventh heat exchanger, and the outlet of the seventh heat exchanger is connected to the dry air inlet.

[0006] The beneficial effects of this application are:

[0007] According to the humidifier testing device in this application embodiment, it can be used for humidifier testing of fuel cell engines. In the specific testing process, external air enters the first air compressor, which performs work to increase pressure and generates a large amount of heat. The heated air then enters the first heat exchanger for cooling before entering the pressure-resistant water tank. The outlet of the first heat exchanger is connected to the bottom of the water surface inside the pressure-resistant water tank. Thus, the air passes under the water surface in the pressure-resistant water tank, where it is humidified by bubbling. The humidified air then enters the pressure-resistant heating water tank and flows from there into the sixth heat exchanger for precise temperature control until it reaches saturation. Finally, the humidified and cooled air flows into the moisture inlet of the humidifier. Simultaneously, external air enters the second air compressor, which performs work to increase pressure and generates a large amount of heat. The heated air then enters the second heat exchanger for cooling before continuing to the seventh heat exchanger for precise temperature control. The precisely temperature-controlled air then flows into the dry air inlet of the humidifier through the outlet of the seventh heat exchanger. In related technologies, dry and wet gases are generated in the cathode subsystem pipeline during the operation of a fuel cell engine. The humidifier testing device in this embodiment simulates the dry and wet gas sources in the cathode subsystem pipeline during the operation of the fuel cell engine. By monitoring the temperature, pressure, and humidity data of the dry and wet side outlets of the humidifier, it determines whether the humidifier can meet the application scenario of the fuel cell engine system, thus enabling more effective testing of the humidifier.

[0008] In some embodiments of this application, the humidifier testing device further includes a first air filter and a second air filter, wherein the outlet of the first air filter is connected to a first air compressor and the outlet of the second air filter is connected to a second air compressor.

[0009] In some embodiments of this application, the first heat exchanger is connected to the pressure-resistant water tank via a first branch and a second branch. The air outlet of the first branch is located below the water surface inside the pressure-resistant water tank, and the air outlet of the second branch is located above the water surface in the pressure-resistant water tank. The humidifier testing device also includes a first circulation pump, which is disposed on the first branch.

[0010] In some embodiments of this application, the pressure-resistant water tank is connected to the pressure-resistant heating water tank through a third branch and a fourth branch. The air outlet of the third branch is located below the water surface of the pressure-resistant heating water tank, and the air outlet of the fourth branch is located above the water surface of the pressure-resistant heating water tank. The humidifier testing device also includes a second circulation pump, which is disposed on the third branch.

[0011] In some embodiments of this application, the humidifier testing device further includes a first circulating water path, which includes a water tank, a first water pump, and a third heat exchanger connected by pipes. The first circulating water path is configured to cool the air in the first air compressor, the second air compressor, and the air passing through the seventh heat exchanger.

[0012] In some embodiments of this application, the humidifier testing device further includes a second circulating water path, which includes a second water pump. The inlet of the second water pump is connected to the outlet of the pressure-resistant heating water tank, and the outlet of the second water pump is connected to a first heat exchanger and a second heat exchanger. The outlet of the first heat exchanger is connected to the pressure-resistant heating water tank, and the outlet of the second heat exchanger is connected to the pressure-resistant heating water tank.

[0013] In some embodiments of this application, the humidifier testing device further includes a fourth heat exchanger and a fifth heat exchanger, wherein the fourth heat exchanger is connected to the dry gas outlet and the fifth heat exchanger is connected to the humid gas outlet.

[0014] In some embodiments of this application, the humidifier testing device further includes a third circulating water path, which includes a heat pump, a third water pump, and a fourth water pump. The inlet of the third water pump is connected to a pressure-resistant water tank, the outlet of the third water pump is connected to the hot side of the heat pump, the outlet of the fourth water pump is connected to the cold side of the heat pump, the outlet of the fourth water pump is connected to a fourth heat exchanger and a fifth heat exchanger, and the outlets of the fourth and fifth heat exchangers are connected to the heat pump.

[0015] The second aspect of this application provides a humidifier testing method, which uses the humidifier testing device in any embodiment of the first aspect to test the humidifier of a fuel cell engine. The testing method includes the following steps:

[0016] Connect the outlet of the sixth heat exchanger of the humidifier testing device to the moisture inlet of the humidifier, and connect the outlet of the seventh heat exchanger of the humidifier testing device to the dry inlet of the humidifier.

[0017] A first gas is introduced into the first gas path so that the first gas passes sequentially through a first air compressor, a first heat exchanger, a pressure-resistant water tank, a pressure-resistant heating water tank, and a sixth heat exchanger. The first gas flows into the moisture inlet of the humidifier from the sixth heat exchanger. The first gas flows into the water below the water surface inside the pressure-resistant water tank from the outlet of the first heat exchanger.

[0018] A second gas is introduced into the second gas path so that the second gas passes sequentially through the second air compressor, the second heat exchanger and the seventh heat exchanger, and the second gas enters the dry gas inlet of the humidifier from the seventh heat exchanger.

[0019] In some embodiments of this application, the pressure-resistant water tank is connected to the pressure-resistant heating water tank via a third branch and a fourth branch. The vent of the third branch is located below the water surface of the pressure-resistant heating water tank, and the vent of the fourth branch is located above the water surface of the pressure-resistant heating water tank. The testing method further includes the following steps:

[0020] The first gas in the pressure-resistant water tank flows into the water below the surface inside the pressure-resistant heating water tank through the third branch. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the humidifier testing device in the application embodiment.

[0023] The attached figures are labeled as follows:

[0024] 110 - First air compressor; 120 - Second air compressor;

[0025] 210 - First heat exchanger; 220 - Second heat exchanger; 230 - Third heat exchanger; 240 - Fourth heat exchanger; 250 - Fifth heat exchanger; 260 - Sixth heat exchanger; 270 - Seventh heat exchanger;

[0026] 310 - Pressure-resistant water tank; 320 - Pressure-resistant heating water tank;

[0027] 411-First circulating pump; 412-Second circulating pump; 421-First water pump; 422-Second water pump; 423-Third water pump; 424-Fourth water pump; 430-Heat pump; 440-Check valve;

[0028] 500 - Humidifier; 510 - Dry air inlet; 520 - Moist air inlet; 530 - Dry air outlet; 540 - Moist air outlet;

[0029] 611 - First back pressure valve; 612 - Second back pressure valve; 621 - First silencer; 622 - Second silencer;

[0030] 711 - First temperature and flow sensor; 712 - Second temperature and flow sensor;

[0031] 721 - First pressure sensor; 722 - Second pressure sensor; 723 - Third pressure sensor; 724 - Fourth pressure sensor; 725 - Fifth pressure sensor; 726 - Sixth pressure sensor; 727 - Seventh pressure sensor;

[0032] 731 - First temperature sensor; 732 - Second temperature sensor; 733 - Third temperature sensor; 734 - Fourth temperature sensor; 735 - Fifth temperature sensor; 736 - Sixth temperature sensor; 737 - Seventh temperature sensor; 738 - Eighth temperature sensor;

[0033] 741 - First humidity sensor; 742 - Second humidity sensor; 743 - Third humidity sensor; 744 - Fourth humidity sensor;

[0034] 810 - First air filter; 820 - Second air filter;

[0035] 910 - Liquid water outlet; 920 - First throttle valve; 930 - External circulating cooling water; 940 - Water tank; 950 - Second throttle valve. Detailed Implementation

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these accompanying drawings.

[0037] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "upper," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure.

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0039] An embodiment of the first aspect of this application provides a humidifier testing device for testing a humidifier 500 in a fuel cell engine. The humidifier 500 includes a moisture inlet 520, a moisture outlet 530, a dry air inlet 510, and a dry air outlet 530. The humidifier testing device includes a first air path and a second air path. The first air path includes a first air compressor 110, a first heat exchanger 210, a pressure-resistant water tank 310, a pressure-resistant heated water tank 320, and a sixth heat exchanger 260, which are connected in sequence by pipes. External air flows sequentially through the first air compressor 110, the first heat exchanger 210, the pressure-resistant water tank 310, and the pressure-resistant heated water tank 320 before entering the sixth heat exchanger 260. The outlet of the first heat exchanger 210 is connected to the bottom of the water surface inside the pressure-resistant water tank 310, and the outlet of the sixth heat exchanger 260 is connected to the moisture inlet 520. The second air path includes a second air compressor 120, a second heat exchanger 220 and a seventh heat exchanger 270 connected in sequence by pipes. External air flows through the second air compressor 120 and the second heat exchanger 220 in sequence and then enters the seventh heat exchanger 270. The outlet of the seventh heat exchanger 270 is connected to the dry air inlet 510.

[0040] The beneficial effects of this application are:

[0041] According to the humidifier testing device in this application embodiment, it can be used to test the humidifier 500 of a fuel cell engine. In the specific testing process, external air enters the first air compressor 110, performs work to increase pressure and generate a large amount of heat. The heated air enters the first heat exchanger 210 for cooling and then enters the pressure-resistant water tank 310. The air outlet of the first heat exchanger 210 is connected to the bottom of the water surface inside the pressure-resistant water tank 310. Thus, after the air passes under the water surface inside the pressure-resistant water tank 310, it can be humidified by bubbling. The humidified air enters the pressure-resistant heating water tank 320 and flows from the pressure-resistant heating water tank 320 into the sixth heat exchanger 260 for precise temperature control and humidification to reach saturation. Finally, the saturated humidified air, after humidification and cooling, flows into the moisture inlet 520 of the humidifier 500. Meanwhile, external air enters the second air compressor 120, where it performs work and is pressurized, generating a large amount of heat. The heated air then enters the second heat exchanger 220 for cooling before continuing into the seventh heat exchanger 270 for precise temperature control. The precisely temperature-controlled air then flows through the outlet of the seventh heat exchanger 270 into the dry gas inlet 510 of the humidifier 500. In related technologies, dry and wet gases are generated in the cathode subsystem piping of a fuel cell engine during operation. The humidifier testing device in this embodiment simulates the dry and wet gas sources in the cathode subsystem piping of the fuel cell engine during operation. By monitoring the temperature, pressure, and humidity data at the dry and wet side outlets of the humidifier 500, it determines whether the humidifier 500 can meet the application scenarios of the fuel cell engine system, thus enabling more effective testing of the humidifier 500.

[0042] In some embodiments of this application, the humidifier testing device further includes a first air filter 810 and a second air filter 820. The outlet of the first air filter 810 is connected to the first air compressor 110, and the outlet of the second air filter 820 is connected to the second air compressor 120. In this embodiment, the first air filter 810 can filter impurities in the air input to the first air compressor 110, such as particulate matter and dust. The second air filter 820 can filter impurities in the air input to the second air compressor 120, such as particulate matter and dust.

[0043] In some embodiments of this application, the first heat exchanger 210 is connected to the pressure-resistant water tank 310 via a first branch and a second branch. The air outlet of the first branch is below the water surface inside the pressure-resistant water tank 310, and the air outlet of the second branch is above the water surface in the pressure-resistant water tank 310. The humidifier testing device also includes a first circulation pump 411, which is disposed on the first branch. In this embodiment, the first heat exchanger 210 is connected to the pressure-resistant water tank 310 via the first branch and the second branch. During the specific testing process, the first circulation pump 411 can force gas circulation and allow gas to flow into the water in the pressure-resistant water tank 310 through the first branch. This allows the gas to bubble in the water, thereby humidifying the gas. In addition, a check valve 440 can be added to the first branch to prevent backflow of water in the first branch. The other path connects to the water surface above the pressure tank 310. This avoids adding airflow resistance and maintains gas pressure balance. At the same time, the gas can be guided to the first path through the second path, allowing the air to be humidified again by bubbling in the water. In this way, the gas can reach the desired humidity more quickly.

[0044] In some embodiments of this application, the pressure-resistant water tank 310 is connected to the pressure-resistant heating water tank 320 via a third branch and a fourth branch. The air outlet of the third branch is below the water surface of the pressure-resistant heating water tank 320, and the air outlet of the fourth branch is above the water surface of the pressure-resistant heating water tank 320. The humidifier testing device also includes a second circulation pump 412, which is disposed on the third branch. In this embodiment, the pressure-resistant water tank 310 is connected to the pressure-resistant heating water tank 320 via the third branch and the fourth branch. During the specific testing process, the second circulation pump 412 can force gas circulation and allow gas to flow into the water of the pressure-resistant heating water tank 320 through the third branch, thus enabling the gas to undergo a second humidification. In addition, a check valve 440 can be added to the third branch to prevent backflow of water in the third branch. The fourth branch connects to the water surface above the pressure-resistant heating water tank 320. This avoids adding airflow resistance and maintains gas pressure balance. At this point, the gas can be guided through the fourth branch to the third branch, allowing the air to be humidified again by bubbling in the water. This embodiment uses a two-stage humidification method to ensure a rapid increase in air humidity to meet testing requirements.

[0045] In some embodiments of this application, the humidifier testing device further includes a first circulating water path, which includes a water tank 940, a first water pump 421, and a third heat exchanger 230 connected by pipes. The first circulating water path is configured to cool the first air compressor 110, the second air compressor 120, and the seventh heat exchanger 270. In this embodiment, the first circulating water path is a cooling water path used to cool the first air compressor 110, the second air compressor 120, and the seventh heat exchanger 270. During the specific testing process, external air entering the first air compressor 110 and the second air compressor 120 performs work and pressurizes, generating a large amount of heat. The cooling water in the first circulating water path can absorb the heat generated by the first air compressor 110 and the second air compressor 120. At the same time, the first circulating water path can cool the seventh heat exchanger 270. Thus, by adjusting the flow rate of the first water pump 421 in the first circulating water path and monitoring the temperature of the outlet of the seventh heat exchanger 270 in real time, the temperature of the outlet of the seventh heat exchanger 270 can be precisely controlled.

[0046] In some embodiments of this application, the humidifier testing device further includes a second circulating water path, which includes a second water pump 422. The inlet of the second water pump 422 is connected to the outlet of the pressure-resistant heating water tank 320, and the outlet of the second water pump 422 is connected to the first heat exchanger 210 and the second heat exchanger 220. The outlet of the first heat exchanger 210 is connected to the pressure-resistant heating water tank 320, and the outlet of the second heat exchanger 220 is also connected to the pressure-resistant heating water tank 320. In this embodiment, the second circulating water path is also a cooling water path. During the test, the second water pump 422 outputs water from the pressure-resistant heating water tank 320 to the first heat exchanger 210 and the second heat exchanger 220, and cools the air in the first heat exchanger 210 and the second heat exchanger 220 and recovers heat. The water that has recovered heat flows back to the pressure-resistant heating water tank 320 for recycling.

[0047] In some embodiments of this application, the humidifier testing device further includes a fourth heat exchanger 240 and a fifth heat exchanger 250, wherein the fourth heat exchanger 240 is connected to the dry gas outlet 530 and the fifth heat exchanger 250 is connected to the humid gas outlet 530. In this embodiment, the dry gas outlet 530 of the humidifier 500 is connected to the fourth heat exchanger 240, and the humid gas outlet 530 of the humidifier 500 is connected to the fifth heat exchanger 250, thereby enabling the cooling of the gas output to the outside.

[0048] In some embodiments of this application, the humidifier testing device further includes a third circulating water path, which includes a heat pump 430, a third water pump 423, and a fourth water pump 424. The inlet of the third water pump 423 is connected to the pressure-resistant water tank 310, the outlet of the third water pump 423 is connected to the hot side of the heat pump 430, the outlet of the fourth water pump 424 is connected to the cold side of the heat pump 430, the outlet of the fourth water pump 424 is connected to the fourth heat exchanger 240 and the fifth heat exchanger 250, and the outlets of the fourth heat exchanger 240 and the fifth heat exchanger 250 are connected to the heat pump 430. In this embodiment, the third circulating water path is a heat recovery water path. During the specific test, water in the pressure-resistant water tank 310 flows into the hot side of the heat pump 430 via the third water pump 423, and is then transported to the fourth heat exchanger 240 and the fifth heat exchanger 250 via the fourth water pump 424. At this time, the water will be heated after heat exchange. Simultaneously, the heated water is transported to the cold side of the heat pump 430 and then returned to the pressure-resistant water tank 310 for continued recycling. This embodiment, through the characteristics of the heat pump 430, can recover and utilize the heat from the dry air outlet 530 and the wet air outlet 530 of the humidifier 500 and transport it to the pressure-resistant water tank 310, effectively improving the heat utilization rate.

[0049] In some embodiments of this application, the humidifier testing device further includes a control system, a flow sensor, a temperature sensor, a pressure sensor, and a humidity sensor, all of which are electrically connected to the control system.

[0050] In one specific embodiment of this application, the humidifier testing device may include a first temperature and flow sensor 711 and a first pressure sensor 721. The first temperature and flow sensor 711 and the first pressure sensor 721 may be disposed between the first air filter and the first air compressor 110 to detect the air inlet of the first air path. The humidifier testing device may also include a second temperature and flow sensor 712 and a second pressure sensor 722. The second temperature and flow sensor 712 and the second pressure sensor 722 may be disposed between the second air filter and the second air compressor 120 to detect the air inlet of the second air path.

[0051] The humidifier testing device may further include a first temperature sensor 731, a second temperature sensor 732, a third temperature sensor 733, a fourth temperature sensor 734, a fifth temperature sensor 735, a sixth temperature sensor 736, a seventh temperature sensor 737, and an eighth temperature sensor 738. The first temperature sensor 731 is used to monitor the temperature inside the pressure-resistant water tank 310, the second temperature sensor 732 is used to monitor the temperature inside the pressure-resistant heated water tank 320, and the third temperature sensor 733 is used to monitor the temperature of the water supplied from the pressure-resistant water tank 310 to the pressure-resistant heated water tank. The temperature of the gas in tank 320 is monitored. The fourth temperature sensor 734 can monitor the temperature of the humid air delivered to the humidifier 500. The fifth temperature sensor 735 can monitor the temperature of the humid air outlet 530 of the humidifier 500. The sixth temperature sensor 736 can monitor the temperature of the dry air delivered to the humidifier 500. The seventh temperature sensor 737 can monitor the temperature of the dry air outlet 530 of the humidifier 500. The eighth temperature sensor 738 can monitor the temperature of the water delivered to the first air compressor 110 in the first circulating water circuit.

[0052] The humidifier testing device may further include a third pressure sensor 723, a fourth pressure sensor 724, a fifth pressure sensor 725, a sixth pressure sensor 726, and a seventh pressure sensor 727. The third pressure sensor 723 is used to monitor the pressure of the gas supplied from the pressure-resistant water tank 310 to the pressure-resistant heating water tank 320. The fourth pressure sensor 724 can monitor the pressure of the humid air supplied to the humidifier 500. The fifth pressure sensor 725 can monitor the pressure of the humid air outlet 530 of the humidifier 500. The sixth pressure sensor 726 can monitor the pressure of the dry air supplied to the humidifier 500. The seventh pressure sensor 727 can monitor the pressure of the dry air outlet 530 of the humidifier 500.

[0053] The humidifier testing device may further include a first humidity sensor 741, a second humidity sensor 742, a third humidity sensor 743, and a fourth humidity sensor 744. The first humidity sensor 741 can monitor the humidity of the humid air supplied to the humidifier 500, the second humidity sensor 742 can monitor the humidity of the humid air outlet 530 of the humidifier 500, the third humidity sensor 743 can monitor the humidity of the dry air supplied to the humidifier 500, and the fourth humidity sensor 744 can monitor the humidity of the dry air outlet 530 of the humidifier 500.

[0054] The humidifier testing device in this embodiment electrically connects the flow sensor, temperature sensor, pressure sensor, and humidity sensor to the control system, enabling real-time monitoring of the operation of each component during humidifier testing, thus making the humidifier testing more accurate.

[0055] In some specific embodiments of this application, the humidifier testing device further includes a first throttle valve 920 and a second throttle valve 950. The first throttle valve 920 and the second throttle valve 950 are respectively disposed at the water inlet of the third heat exchanger 230 and the sixth heat exchanger 260 to regulate the water pressure. In addition, the water outlets of the third heat exchanger 230 and the sixth heat exchanger 260 can also be connected to the external external circulating cooling water 930 for water circulation.

[0056] In some specific embodiments of this application, humid air will generate condensate after passing through the sixth heat exchanger 260. At this time, a liquid water outlet 910 can be provided on the sixth heat exchanger 260.

[0057] In some specific embodiments of this application, the humidifier testing device further includes a first back pressure valve 611, a second back pressure valve 612, a first silencer 621, and a second silencer 622. The outlet of the fourth heat exchanger is connected to the first back pressure valve 611, and the outlet of the fifth heat exchanger 250 is connected to the second back pressure valve 612. The first silencer 621 is configured to silence the dry air outlet 530 of the humidifier 500, and the second silencer 622 is configured to silence the wet air outlet 530 of the humidifier 500. In this embodiment, the first back pressure valve 611 and the second back pressure valve 612 are respectively connected to the outlet of the fourth heat exchanger 240 and the outlet of the fifth heat exchanger 250. By real-time monitoring of the humidity, pressure, and temperature at the outlet, and by adjusting the speed of the first back pressure valve 611 and the first air compressor 110, the required flow rate and pressure for the humidifier 500 during testing are achieved. Similarly, by adjusting the speed of the second back pressure valve 612 and the second air compressor 120, the required flow rate and pressure for the dry air path during testing are achieved. The humidifier testing device also includes a first silencer 621 and a second silencer 622. The first silencer 621 is used to silence the dry air outlet 530 of the humidifier 500, and the second silencer 622 is used to silence the humidifier 500's humid air outlet 530.

[0058] The second aspect of this application provides a humidifier testing method, which uses the humidifier testing device in any embodiment of the first aspect to test the humidifier of a fuel cell engine. The testing method includes the following steps:

[0059] Connect the outlet of the sixth heat exchanger 260 of the humidifier test device to the wet gas inlet 520 of the humidifier, and connect the outlet of the seventh heat exchanger 270 of the humidifier test device to the dry gas inlet 510 of the humidifier.

[0060] A first gas is introduced into the first gas path so that the first gas passes sequentially through the first air compressor 110, the first heat exchanger 210, the pressure-resistant water tank 310, the pressure-resistant heating water tank 320 and the sixth heat exchanger 260. The first gas flows into the moisture inlet 520 of the humidifier from the sixth heat exchanger 260. The first gas flows into the water surface inside the pressure-resistant water tank 310 from the outlet of the first heat exchanger 210.

[0061] A second gas is introduced into the second gas path so that the second gas passes sequentially through the second air compressor 120, the second heat exchanger 220 and the seventh heat exchanger 270, and the second gas enters the dry gas inlet 510 of the humidifier from the seventh heat exchanger 270.

[0062] According to the humidifier testing method in the embodiments of this application, the humidifier testing device in any embodiment of the first aspect is used to test the humidifier 500 of the fuel cell engine. When testing the humidifier 500, the outlet of the sixth heat exchanger 260 of the humidifier testing device can be connected to the wet gas inlet 520 of the humidifier 500, and the outlet of the seventh heat exchanger 270 of the humidifier testing device can be connected to the dry gas inlet 510 of the humidifier 500. Then, a first gas is introduced into one end of the first gas path of the humidifier testing device. The first gas enters the first air compressor 110, performs work, and increases its pressure to generate a large amount of heat. The heated first gas then enters the first heat exchanger 210... After cooling, the gas enters a pressure-resistant water tank. The outlet of the first heat exchanger 210 is connected to the bottom of the water surface inside the pressure-resistant water tank 310. Thus, the first gas passes under the water surface in the pressure-resistant water tank 310 and is humidified by bubbling. The humidified first gas then enters a pressure-resistant heating water tank 320 and flows from there into a sixth heat exchanger 260 for precise temperature control and saturation. Finally, the humidified and cooled gas flows into the moisture inlet 520 of the humidifier. Simultaneously, a second gas is introduced into one end of the second gas path of the humidifier testing device. This second gas enters the second air compressor 120, where it performs work and increases in pressure, generating a large amount of heat. The heated second gas then enters the second heat exchanger 220 for cooling and continues into the seventh heat exchanger 270 for precise temperature control. After precise temperature control, the second gas flows through the outlet of the seventh heat exchanger 270 into the dry gas inlet 510 of the humidifier 500. In related technologies, dry and wet gases are generated in the cathode subsystem pipeline during the operation of a fuel cell engine. The humidifier testing method in this embodiment uses the humidifier testing device in any embodiment of the first aspect to test the humidifier 500. By simulating the dry and wet gas sources in the cathode subsystem pipeline during the operation of the fuel cell engine, and by monitoring the temperature, pressure, and humidity data of the dry and wet side outlets of the humidifier 500, it is determined whether the humidifier 500 can meet the application scenario of the fuel cell engine system. This allows for more effective testing of the humidifier.

[0063] In some embodiments of this application, the pressure-resistant water tank 310 is connected to the pressure-resistant heating water tank 320 via a third branch and a fourth branch. The outlet of the third branch is below the water surface of the pressure-resistant heating water tank 320, and the outlet of the fourth branch is above the water surface of the pressure-resistant heating water tank 320. The testing method further includes: allowing the first gas in the pressure-resistant water tank 310 to flow into the water surface inside the pressure-resistant heating water tank 320 via the third branch. In this embodiment, the pressure-resistant water tank 310 is connected to the pressure-resistant heating water tank 320 via the third branch and the fourth branch. During the specific testing process, the second circulation pump 412 can force the first gas to circulate and allow the first gas to flow into the water in the pressure-resistant heating water tank 320 via the third branch, thus enabling the first gas to undergo a second humidification. In addition, a check valve 440 can be added to the third branch to prevent backflow of water in the third branch. The fourth branch connects to the water surface above the pressure-resistant heating water tank 320. This avoids adding airflow resistance and maintains gas pressure balance. At this point, the gas can be guided through the fourth branch to the third branch, allowing the first gas to be humidified again by bubbling in the water. This embodiment uses a two-stage humidification method to ensure a rapid increase in the humidity of the first gas, meeting testing requirements.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A humidifier testing device for testing a humidifier of a fuel cell engine, the humidifier comprising a wet gas inlet, a wet gas outlet, a dry gas inlet and a dry gas outlet, characterized by, The humidifier test device comprises: a first air path comprising a first air compressor, a first heat exchanger, a pressure-resistant water tank, a pressure-resistant heated water tank and a sixth heat exchanger connected in sequence by pipelines, external air flows into the sixth heat exchanger after flowing through the first air compressor, the first heat exchanger, the pressure-resistant water tank and the pressure-resistant heated water tank in sequence, the air outlet of the first heat exchanger is connected with the water surface below the pressure-resistant water tank, and the air outlet of the sixth heat exchanger is connected with the wet gas inlet; A second air path comprising a second air compressor, a second heat exchanger and a seventh heat exchanger connected in sequence by pipelines, external air flows into the seventh heat exchanger after flowing through the second air compressor and the second heat exchanger in sequence, and the air outlet of the seventh heat exchanger is connected with the dry gas inlet. The humidifier test device further comprises a fourth heat exchanger and a fifth heat exchanger, the fourth heat exchanger is connected with the dry gas outlet, and the fifth heat exchanger is connected with the wet gas outlet. The humidifier test device further comprises a third circulating water path comprising a heat pump, a third water pump and a fourth water pump, the water inlet end of the third water pump is connected with the pressure-resistant water tank, the water outlet end of the third water pump is connected with the hot side of the heat pump, the water inlet end of the fourth water pump is connected with the cold side of the heat pump, the water outlet end of the fourth water pump is connected with the fourth heat exchanger and the fifth heat exchanger, and the water outlet ends of the fourth heat exchanger and the fifth heat exchanger are connected with the heat pump.

2. The humidifier test device of claim 1, wherein, The humidifier test device further comprises a first air filter and a second air filter, the air outlet of the first air filter is connected with the first air compressor, and the air outlet of the second air filter is connected with the second air compressor.

3. The humidifier test device of claim 1, wherein, The first heat exchanger is connected with the pressure-resistant water tank through a first branch and a second branch, the air outlet end of the first branch is below the water surface in the pressure-resistant water tank, the air outlet end of the second branch is above the water surface of the pressure-resistant water tank, and the humidifier test device further comprises a first circulating pump arranged on the first branch.

4. The humidifier test device of claim 1, wherein, The pressure-resistant water tank is connected with the pressure-resistant heated water tank through a third branch and a fourth branch, the air outlet end of the third branch is below the water surface of the pressure-resistant heated water tank, the air outlet end of the fourth branch is above the water surface of the pressure-resistant heated water tank, and the humidifier test device further comprises a second circulating pump arranged on the third branch.

5. The humidifier test device of claim 1, wherein, The humidifier test device further comprises a first circulating water path comprising a water tank, a first water pump and a third heat exchanger connected by pipelines, and the first circulating water path is configured to cool the first air compressor, the second air compressor and air in the seventh heat exchanger.

6. The humidifier test device of claim 1, wherein, The humidifier test device further comprises a second circulating water circuit, the second circulating water circuit comprises a second water pump, the water inlet end of the second water pump is communicated with the water outlet of the pressure-resistant heating water tank, the water outlet of the second water pump is communicated with the first heat exchanger and the second heat exchanger, the water outlet of the first heat exchanger is communicated with the pressure-resistant heating water tank, and the water outlet of the second heat exchanger is communicated with the pressure-resistant heating water tank.

7. A humidifier testing method, characterized by, The humidifier test device according to any one of claims 1 to 6 is used to test the humidifier of a fuel cell engine, and the testing method comprises the following steps: connecting the gas outlet of the sixth heat exchanger of the humidifier test device with the humidifier gas inlet, and connecting the gas outlet of the seventh heat exchanger of the humidifier test device with the humidifier dry gas inlet; introducing a first gas into the first gas circuit, so that the first gas sequentially passes through the first air compressor, the first heat exchanger, the pressure-resistant water tank, the pressure-resistant heating water tank and the sixth heat exchanger, and the first gas flows into the humidifier gas inlet from the sixth heat exchanger, wherein the first gas flows into the water surface below the pressure-resistant water tank from the gas outlet of the first heat exchanger; introducing a second gas into the second gas circuit, so that the second gas sequentially passes through the second air compressor, the second heat exchanger and the seventh heat exchanger, and the second gas enters the humidifier dry gas inlet from the seventh heat exchanger.

8. The humidifier testing method of claim 7, wherein, The pressure-resistant water tank is communicated with the pressure-resistant heating water tank through a third branch and a fourth branch, the gas outlet end of the third branch is below the water surface of the pressure-resistant heating water tank, the gas outlet end of the fourth branch is above the water surface of the pressure-resistant heating water tank, and the testing method further comprises the following steps: The first gas in the pressure-resistant water tank flows into the water surface below the pressure-resistant heating water tank from the third branch.

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