R744 air conditioner pipeline sealing structure

Abstract

The invention discloses an R744 air conditioner pipeline sealing structure which comprises a male joint, an end surface sealing gasket, a first O-shaped ring, a second O-shaped ring and a female joint. A sealing shaft of a hollow structure is arranged on the end surface of the inner side of the male joint, the sealing shaft communicates to a connecting hole in the end surface of the outer side ofthe male joint for mounting an air conditioner pipe, and the end surface sealing gasket, the first O-shaped ring and the second O-shaped ring are sequentially mounted on the sealing shaft axially; a sealing through hole where the sealing shaft is inserted is formed in the end surface of the inner side of the female joint, and the sealing through hole is of a step-like structure and communicates tothe connecting hole in the end surface of the outer side of the female joint for mounting the air conditioner pipe. The R744 air conditioner pipeline sealing structure can meet the demand on high-temperature and high-pressure impact resistance and high R744 medium infiltration capacity required by coupling and sealing assemblies. By adopting a dual O-shaped ring non-isometric design, the problemthat the female and male joints are hard to assemble is solved, and the on-site assembling efficiency is improved effectively.

Description

technical field [0001] The invention relates to an R744 automobile air-conditioning system, in particular to an R744 air-conditioning pipeline sealing structure. Background technique [0002] From January 1, 2017, all newly registered vehicles in the EU must use refrigerants with a GWP value (global warming potential) of less than 150. The GWP value is a (relative) measure of how much a substance contributes to global warming. In addition to chemical means, natural R744 (carbon dioxide) with a GWP value of 1 is an alternative to traditional refrigerants. R744 has extremely high technical requirements for components and even the entire system. The components in the air conditioning system have changed, and the requirements for the connection and sealing between the components have also changed. With the application of R744 working fluid, the working pressure in the system has increased by 3 to 4 times, the working pressure at the high pressure end has reached 14Mpa, and the...

AI Technical Summary

Problems solved by technology

With the application of R744 working fluid, the working pressure in the system has increased by 3 to 4 times, the working pressure at the high pressure end has reached 14Mpa, and the working temperature has increased to 165°C; the existing sealing structure of the air-conditioning tube for vehicles cannot meet the requirements of the R744 working fluid system High temperature and high pressure requirements

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