Detection control device and method for ejector and fuel cell system
A technology of detection control and ejector, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problem of inability to identify potential failures of the ejector
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Embodiment 1
[0058] An embodiment of the present invention provides a detection and control device for an ejector, including a stack, a hydrogen source, hydrogen injectors one and two, an ejector to be tested, hydrogen recovery equipment, and a controller.
[0059] The hydrogen injector is a device that accelerates the gas flow by changing the geometry of the inner wall of the pipe section. It is used at the hydrogen inlet end of the fuel cell to depressurize and speed up the high-pressure hydrogen flow.
[0060] The ejector to be tested is a device that uses a high-speed high-energy flow (liquid flow, air flow or other material flow) to eject another low-speed low-energy flow. jet.
[0061] The hydrogen output from the hydrogen source is transmitted to the hydrogen inlet of the stack through hydrogen injector 2, and the other is transmitted from the nozzle inlet of the injector to be tested to the hydrogen inlet of the stack through hydrogen injector 1; the hydrogen discharged from the s...
Embodiment 2
[0069] To improve on the basis of Embodiment 1, the detection and control device of the injector also includes a water separator, a drain valve, and an exhaust valve, such as Figure 3~4 shown.
[0070] The air inlet of the water separator is connected to the outlet of the electric stack, its gas outlet is connected to the input end of the hydrogen recovery equipment, and its drain is connected to the drain valve; the hydrogen gas outlet of the hydrogen recovery equipment is connected to the diversion gas inlet of the ejector, Its tail gas outlet is connected with the exhaust valve.
[0071] Preferably, the controller further includes a data acquisition unit, a data processing and control unit connected in sequence.
[0072] The data acquisition unit is used to collect in real time the incoming hydrogen pressure of the stack, and the gas pressure at the output end of the hydrogen recovery equipment as the outgoing hydrogen pressure, and send it to the data processing and cont...
Embodiment 3
[0093] The present invention also discloses a detection and control method of the ejector using the detection and control device of the above-mentioned embodiments 1 and 2, which includes the following steps:
[0094] S1. Start the hydrogen injector 1 after receiving the injector detection command from the user;
[0095] S2. Obtain the difference between the hydrogen pressure entering the stack and the hydrogen pressure leaving the stack;
[0096] S3. Judging whether the ejector to be tested is working normally according to the above difference; if it is working normally, output the normal result of the ejector; if it is not working normally, start the hydrogen injector 2, and increase the internal temperature of the ejector to be tested at the same time, again Judging until the ejector under test works normally, output the normal result of the ejector.
[0097] Preferably, the abnormal operation includes icing at the inlet of the diverting gas or icing at the inlet of the no...
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