Ejector and fuel cell hydrogen inlet adjusting and hydrogen-returning device applying same

Abstract

The invention discloses an ejector and a fuel cell hydrogen inlet adjusting and hydrogen-returning device applying the same. The ejector comprises a nozzle, a mixing chamber, an ejection sleeve, an inner sealing ring and a fastening screw, wherein the nozzle and the mixing chamber are arranged at the two ends of the ejection sleeve in a sleeving mode respectively; a notch is formed in the wall surface of the middle part of the ejection sleeve to serve as an inlet of a drainage fluid; a first flow channel is arranged in the middle of the nozzle and serves as a channel of a working high-pressurefluid; one end of the nozzle is provided with a high-pressure fluid inlet, and the other end of the nozzle is a high-pressure injection port; the mixing chamber is provided with a mixing section flowchannel and an expansion section flow channel; and the working high-pressure fluid ejected from the high-pressure injection port is mixed with the drained fluid flowed from the notch through the mixing section flow channel and then is ejected out after passing through the expansion section flow channel. The structure can adopt standardized and serialized design, and the part structure design is high in design and processing precision, high in interchangeability and low in cost, and the nozzle and the mixing chamber are replaced in a combined mode under the condition that the ejector sleeve isnot changed, so that different performance requirements can be met.

Description

[0001] Technical field: [0002] The invention relates to an injector and a fuel cell hydrogen inlet regulating hydrogen return device applied thereto. [0003] Background technique: [0004] Hydrogen fuel cells can directly convert the chemical energy of hydrogen into electrical energy without combustion. Due to its high efficiency and power density, zero emissions, and quiet operation, it is very suitable for fuel cell vehicles. In the hydrogen circulation system of a hydrogen fuel cell vehicle, a hydrogen circulation pump is usually used as a hydrogen circulation device, but the hydrogen circulation pump is difficult to manufacture, high in cost, low in reliability, and consumes extra power. Because the ejector has outstanding advantages such as simple structure, high reliability, low cost, and no additional power consumption when installed in the system, it has a development trend of replacing the hydrogen circulation pump. [0005] However, the structural design, processi...

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Problems solved by technology

[0007] The purpose of the present invention is to provide an injector and a fuel cell hydrogen inlet regulating hydrogen return device for its application, which solves the difficulty in structural design, processing and manufacturing of the injector in the prior art, and the versatility and interchangeability of various functional parts are poor. , high cost of design, development and testing, and difficult to integrate with other parts of the entire hydrogen circuit

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