Variable flow type ejector for fuel cell based on electromagnetic control valve

Abstract

The invention aims to provide a variable flow type ejector for a fuel cell based on an electromagnetic control valve, the variable flow type ejector comprises an ejector main body, an annular main and auxiliary type nozzle main body and a main air channel electromagnetic control valve, and the ejector main body internally comprises a suction chamber, a mixing chamber, a diffusion chamber and a mixed gas outlet which are communicated in sequence; an annular main and auxiliary nozzle body is arranged between the suction chamber and the end of the ejector body and comprises an annular main nozzle and an annular auxiliary nozzle, an ejection flow main air channel is formed in the annular main nozzle, an ejection flow auxiliary air channel is formed between the annular auxiliary nozzle and the annular main nozzle, and a main air channel electromagnetic control valve is arranged in the ejection flow main air channel. The circulating sectional area of hydrogen at the inlet is controlled by controlling on-off of the electromagnetic valve, so that small-flow circulation of hydrogen under a small load and large-flow circulation of hydrogen under a large load are realized, the working performance of the ejector is automatically adjusted, and the requirement of a fuel cell on hydrogen circulation under all working conditions is met.

Description

technical field [0001] The invention relates to a hydrogen fuel cell, in particular to a variable flow ejector of the hydrogen fuel cell. Background technique [0002] With the continuous development of the global economy, people's demand for energy is also increasing day by day. The consumption of traditional energy also produces a lot of pollution. It is becoming more and more important to develop clean energy that can replace traditional energy. A fuel cell is a power generation device that directly converts chemical energy into electrical energy. It has the advantages of high energy conversion efficiency, fast start-up, zero pollution, stable operation, and low noise. It is an ideal substitute for traditional energy sources. [0003] In the working process of fuel cells, excess hydrogen supply is generally used to achieve high-efficiency power generation, so hydrogen circulation devices are usually required in fuel cells to realize injection and recycling of excess hydro...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is difficult to achieve a good seal between the connecting rod and the ejector housing, and the ejection performance is limited by the fixed geometry of the ejector

[0006] From the current patent analysis, it can be seen that when the ejector flow is small and the geometric structure of the ejector is fixed in application, it is difficult to meet the demand for hydrogen circulation in the full working condition of the fuel cell.

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