Automatic adjusting device for built-in volume ratio of fuel cell air compressor

Abstract

The invention discloses an automatic adjusting device for a built-in volume ratio of a fuel cell air compressor. The automatic adjusting device for the built-in volume ratio of the fuel cell air compressor comprises an exhaust shell arranged on the air compressor; an installation through hole is formed in the exhaust shell, and an exhaust chamber on the air compressor communicates with a bypass air chamber by the installation through hole; a volume plunger is arranged in the installation through hole; when the volume plunger is attached or separated from the air compressor, the exhaust chambercommunicates or does not communicate with the bypass air chamber; the automatic adjusting device provided by the invention can make the air compressor still operate efficiently under the low pressureworking condition of the original design with the high pressure working condition; under low pressure conditions, the volume plunger is pushed, a volume chamber is opened, the compression process isexhausted in advance, and the compression process is reduced; under high pressure conditions, the volume cavity is blocked, so that the compression process is completely compressed, and the air compressor has less under-compression and over-compression during use; the power loss of the motor is reduced; and the performance efficiency of the air compressor is improved.

Description

Technical field [0001] The present invention relates to the technical field of air compressors, and in particular to an automatic adjustment device for the built-in volume ratio of an air compressor for a fuel cell. Background technique [0002] With the increasingly prominent problems of energy scarcity and environmental damage, fuel cell technology has attracted more and more attention. [0003] The air compressor is an important component of the fuel cell cathode air supply system for vehicles. By pressurizing the air entering the stack, the power density and efficiency of the fuel cell can be improved, and the size of the fuel cell system can be reduced. However, the parasitic power consumption of the air compressor is large, accounting for about 80% of the auxiliary power consumption of the fuel cell system, and its performance directly affects the efficiency, compactness and water balance of the fuel cell system. Therefore, all countries in the world attach great importance ...

AI Technical Summary

Problems solved by technology

[0005] Most air compressors have a fixed built-in volume ratio structure, which cannot make the air compressor achieve the best built-in volume ratio under various pressure ratio conditions, and the air compressor often appears over-compression or under-compression during operation. , will cause waste of power consumption and reduce the efficiency of the compressor, thereby affecting the efficiency of the fuel cell system

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