Electronic expansion valve

Abstract

The invention discloses an electronic expansion valve which comprises a casing. The electronic expansion valve is characterized in that a positioning device is arranged on the upper portion of the inside of the casing, a rotor is arranged in the middle of the casing, a nut base is arranged on the lower portion of the casing, a communication cavity is arranged at the lower end of the casing and is respectively communicated with two copper pipes, and an elastic sealing device is arranged at the lower end of the rotor. Furthermore, a mandrel is installed in the rotor, the upper portion of the mandrel is connected with the positioning device, the lower portion of the mandrel is connected with an ejector pin, and the elastic sealing device is arranged at the lower end of the ejector pin. The elastic sealing device comprises an elastic round cushion wrapped at the lower end of the ejector pin, and the elastic round cushion is installed on the ejector pin through a fixing groove. The elastic round cushion is arranged at the lower end of the ejector pin and is installed on the ejector pin through the fixing groove. Due to the design, leak tightness between the ejector pin and the communication cavity is reinforced, the ejector pin is protected, and abrasion of the end of the ejector pin is avoided. The elastic round cushion is convenient to replace after abraded, the price is low, and using cost is reduced.

Description

technical field [0001] The invention belongs to the field of flow control, and in particular relates to an electronic expansion valve. Background technique [0002] With the progress of society, the development of cities, people use more and more air conditioners in their daily life. As an important flow control device in the field of air conditioning, the electronic expansion valve realizes the purpose of adjusting the temperature change of the air conditioner by adjusting the refrigerant flow rate of the electronic expansion valve. The adjustment of the air-conditioning refrigerant flow by the electronic expansion valve is a precision adjustment, because the adjustment of the flow of the electronic expansion valve is a precision adjustment, so the more accurate the flow adjustment of the electronic expansion valve, the smaller the deviation of the flow adjustment, and the more accurate the temperature control of the air conditioner. It can also be more important to improv...

AI Technical Summary

Problems solved by technology

However, after long-term use, the end of the thimble will be in contact with the communication cavity for a long time, which will cause the end of the thimble to wear and affect its sealing performance. At the same time, the cost of the thimble is high, and the replaced thimble cannot be reused, resulting in an increase in use costs.

Images