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

An air compressor and fuel cell technology, applied in the field of air compressors, can solve problems affecting the efficiency of fuel cell systems, waste of power consumption, and reduce compressor efficiency, so as to achieve high applicability, reduce energy consumption, and improve compressor efficiency Effect

CN109854509APending Publication Date: 2019-06-07FUJIAN SNOWMAN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-06-07

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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.
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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 ...

Examples

Embodiment

[0047] An automatic adjustment device for the built-in volume ratio of an air compressor for fuel cells, such as figure 1 , figure 2 , image 3 As shown, the exhaust housing 14 is provided on the air compressor; the air compressor is a screw compressor; and the exhaust housing 14 is provided with a mounting through hole 141, and the mounting through hole 141 connects the air compressor The exhaust cavity 8 on the rotor housing 15 is in communication with the bypass air cavity 9; the installation through hole 141 is provided with a capacity plunger 6, when the capacity plunger 6 is attached to the rotor housing 15, exhaust The cavity 8 and the bypass air cavity 9 are not connected. When the volume plunger 6 is separated from the rotor housing 15, the exhaust cavity 8 and the bypass air cavity 9 are connected; in order to ensure the sealing of the volume plunger 6 and the inner wall of the installation through hole 141 The outer wall of the displacement plunger 6 is provided wit...