One-way valve for automobile air conditioner

Abstract

The invention discloses a one-way valve of a vehicle air conditioner. The one-way valve comprises a valve base, a movable valve element, a valve bush and a spring. The valve bush is connected to the valve base in a sleeving manner. The caliber of an air outlet of the valve base and the caliber of an air inlet of the valve bush are both smaller than the pipe diameter of a valve body. The movable valve element and a three-branch fixed frame are arranged in the valve bush. The top of the movable valve element is arranged to be in a step shape. A boss extends out of the top of the movable valve element. A composite sealing gasket is mounted on the boss and matched with an annular boss on the inner wall of the valve bush. The spring is connected between the movable valve element and the three-branch fixed frame. The movable valve element is connected to a movable shaft of the three-branch fixed frame in a sleeving manner and connected to an air outlet of the valve bush. A sealing material on the movable valve element in the one-way valve has the efficient performance of high temperature resistance and corrosion resistance; the sealing material breaks through the difficulty of reprocessing of a polytetrafluoroethylene membrane; the tensile strength of the membrane is greatly enhanced; no leakage happens to products; and the problems that after single polytetrafluoroethylene is used as the sealing gasket, crush resistance cannot be achieved, and cracking is prone to happening are solved.

Description

technical field [0001] The invention belongs to the technical field of automobile air conditioners, in particular to an automobile air conditioner check valve. Background technique [0002] With the development of the automobile manufacturing industry, the research on automobile air conditioning technology is getting faster and faster. The one-way valve in the car air conditioner is a very important part of the car air conditioner. The one-way valve is used in the heat pump air conditioner. When the air conditioner is in cooling operation, the refrigerant pushes the steel ball in the valve open to make the pipeline unblocked. The bypassed heating capillary is inoperative and short circuited. When the air conditioner is heating, the refrigerant flows in the opposite direction, pressing the steel ball tightly on the valve seat. At this time, the passage in the valve is closed to prevent the refrigerant from flowing backward from the one-way valve. The function of the one-wa...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention discloses an automobile air-conditioning check valve, which can continuously provide comfortable air-conditioning services for the interior of the automobile during the cooling or heating process of the automobile. The material has high-efficiency performance of high temperature resistance and corrosion resistance. The sealing material breaks through the difficulty of reprocessing the PTFE membrane. It adopts special treatment to greatly enhance the tensile strength of the membrane. After 200,000 cycle tests, the product has no leakage. The anatomical analysis is in good condition, which solves the problem that a single polytetrafluoroethylene is not compressive and easy to crack after being used as a sealing gasket

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