Second H type automobile air conditioner heat expansion valve with filter structure

Abstract

This invention is a secondary throttle H type vehicle air conditioner thermostatic expansion valve with filter structure. It includes valve body, valve port throttling channel, valve port throttling fore-channel, valve port throttling back-channel and connecting holes. The channel cross section of throttling hole is smaller than the maximum cross section of valve port throttling channel. There is filtering net between connecting hole and valve port throttling fore-channel. It is fixed by clamping spring. High pressure liquid refrigerant undertakes double throttling. It increases the energy efficiency ratio and refrigerating volume. The filtering net can ensure refrigerating system work well.

Description

Technical field [0001] The invention relates to a secondary throttling H-type automobile air conditioning thermal expansion valve with a filter structure, belonging to the throttling technical field of a vapor compression refrigeration system, and is particularly suitable for the refrigeration system of an automobile air conditioning device as a throttling element. Background technique [0002] The H-type automobile air-conditioning thermal expansion valve currently used for throttling of the refrigeration system of automobile air-conditioning devices, only through the bellows feeling temperature, automatically adjusts the valve port throttling channel section for a throttling, the channel sections before and after throttling are both Larger than the maximum cross-section of the throttling passage of the valve port, it is difficult to overcome the general fluctuation and oscillation of the thermal expansion valve, and its connecting hole, liquid inlet and valve body have no filte...

AI Technical Summary

Problems solved by technology

[0002] The H-type automotive air-conditioning thermodynamic expansion valve currently used for throttling in the refrigeration system of the automobile air-conditioning device only uses the bellows to sense the temperature and automatically adjusts the throttling passage section of the valve port to perform one throttling. The passage sections before and after throttling are equal Larger than the maximum cross-section of the throttling channel at the valve port, it is difficult to overcome the common fluctuations and oscillations of the thermal expansion valve, and there is no filtering structure in the connection hole, the liquid inlet hole and the valve body, when the impurities in the refrigeration system enter the adjustment of the thermal expansion valve When the mechanism is blocked, it may cause jamming or blockage, resulting in a decrease in the energy efficiency ratio and cooling capacity of the refrigeration system or failure to work normally.

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