Automobile air conditioner thermostatic expansion valve

Abstract

The invention belongs to the technical field of expansion valves, and particularly relates to an automobile air conditioner thermostatic expansion valve. The automobile air conditioner thermostatic expansion valve comprises a valve body, wherein the top end of the valve body is fixedly connected with a power head, a diaphragm is fixedly connected in the power head, a liquid inlet is formed in oneside of the valve body, a liquid outlet is formed in the other side of the valve body, a valve cavity is formed in the valve body, the valve cavity is located below the liquid outlet and communicateswith the liquid outlet through a first liquid inlet hole, the liquid inlet communicates with the valve cavity, the bottom end of the valve body is in threaded connection with an adjusting seat, the top end of the adjusting seat is positioned in the valve cavity, the bottom end of the diaphragm is fixedly connected with an ejector rod, the end, away from the diaphragm, of the ejector rod penetratesthrough the valve body, enters the valve cavity through the first liquid inlet hole and is fixedly connected with a semicircular ball valve. The automobile air conditioner thermostatic expansion valve solves the problems that the flow of a refrigerant in the expansion valve is in a fixed state, and when the temperature in an automobile suddenly rises, the temperature cannot be quickly reduced, and the driving risk is increased.

Description

technical field [0001] The invention belongs to the technical field of expansion valves, in particular to a thermal expansion valve for an automobile air conditioner. Background technique [0002] The expansion valve is an important part in the refrigeration system, generally installed between the liquid storage cylinder and the evaporator. The expansion valve makes the medium-temperature and high-pressure liquid refrigerant become low-temperature and low-pressure wet steam through its throttling, and then the refrigerant absorbs heat in the evaporator to achieve the cooling effect. The expansion valve controls the flow rate of the valve through the change of the superheat at the end of the evaporator to prevent Insufficient utilization of evaporator area and knocking phenomenon. [0003] There are also some technical solutions for expansion valves in the prior art. For example, a Chinese patent with application number 2020204531528 discloses a thermal expansion valve for n...

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Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology, when the valve ball in the expansion valve no longer closes the passage in the valve body, the passage in the valve body is in a connected state, but once the valve ball no longer covers the passage, the connection between the connecting column and the passage The opening area will not change, causing the flow rate of the internal refrigerant to be in a fixed state. When the temperature inside the car suddenly rises, it will not be able to quickly cool down and increase the risk of driving. The problem proposed by the present invention A thermal expansion valve for an automobile air conditioner

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