Ventilation structure, ventilation control method and fuel cell engine

Abstract

The invention discloses a ventilation structure applied to a fuel cell engine, comprising a first pipeline and a second pipeline, one end of the first pipeline is communicated with a ventilation inlet, and the other end of the first pipeline is provided with a first branch pipeline and the second branch pipeline, the first branch pipeline is connected with the air outlet pipe of the intercooler on the air supply device, and the second branch pipeline is connected with the air outlet pipe of the air compressor on the air supply device; the first branch pipeline is provided with a first branch pipe. a control valve, a second control valve is arranged on the second branch pipeline; and when the hydrogen concentration exceeds the preset hydrogen concentration value, the first control valve and / or the second control valve is opened; when the ambient temperature is lower than the preset temperature value , at least the second control valve is opened. The ventilation structure can effectively reduce the energy consumption of the ventilation structure, and when the engine is in a cold start, it is beneficial for the fuel cell to be started in a low temperature environment. In addition, the present invention also provides a ventilation control method and a fuel cell engine.

Description

technical field [0001] The invention relates to the technical field of fuel cell engines, in particular to a ventilation structure, a ventilation control method and a fuel cell engine. Background technique [0002] During the use of the fuel cell engine, due to the risk of hydrogen leakage inside the stack, vents are set on the engine casing, but because the vents are set as openings, the IP level (dustproof and moisture-proof) of the engine cannot meet the high standard ; and the current ventilation device is always in the working state, and it is impossible to control whether ventilation is needed according to the hydrogen concentration inside the stack, resulting in the ventilation fan working all the time and high energy consumption. And its ventilation device is an opening design, so that the engine IP level (dustproof and moistureproof) cannot meet the high standard. In addition, when the engine is in cold start, if the external environment is a low-temperature enviro...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a ventilation structure, a ventilation control method and a fuel cell engine, so as to solve the problems of high energy consumption of the ventilation device of the fuel cell engine, limited improvement of the IP level, and unfavorable starting of the engine in a low temperature environment

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