Main valve of four-way reversing valve and four-way reversing valve provided with main valve

Abstract

The invention discloses a main valve of a four-way reversing valve. The main valve comprises a valve body, two piston devices and sliding blocks, wherein the piston devices are arranged in the valve body and connected through a connecting rod; the sliding blocks and the piston devices move synchronously; piston cups and piston spring pieces are arranged in the piston devices, the piston cups are glidingly matched with the inner wall of the valve body, and the piston spring pieces are arranged in the piston cups and provide radial action force; the thickness of each piston cup is 0.55-0.65mm, and the thickness of each piston spring piece is 0.11-0.15mm; and the piston cups are made of materials by weight of 85%-95% of a polytetrafluoroethylene base material and 5%-15% of an additive capable of reducing friction coefficients. By means of optimization and improvement in two aspects of structure dimension and material selection, the adaptability of the four-way reversing valve is effectively improved, and configuration requirements of different air conditioning systems can be met. On the basis, the invention further provides a four-way reversing valve provided with the main valve.

Description

technical field [0001] The invention relates to a valve element used in a refrigerant circulation system, in particular to a main valve of a four-way reversing valve and a four-way reversing valve with the main valve. Background technique [0002] The existing four-way reversing valve includes three main parts such as main valve, pilot valve and electromagnetic coil. In actual application, the four-way reversing valve is located in the refrigerant circuit composed of the compressor, condenser, indoor heat exchanger and outdoor heat exchanger, and the reversing of the main valve is realized through the joint action of the electromagnetic coil and the pilot valve. Switching the flow direction of the cooling medium enables the heat pump air conditioner to switch between the two working states of cooling and heating, achieving the purpose of cooling in summer and heating in winter. [0003] At present, the main valve of the traditional four-way reversing valve has four ports: t...

AI Technical Summary

Problems solved by technology

However, with the continuous development and changes of customer needs, the specific conditions of use also show a trend of gradual upgrading and changes. The traditional four-way reversing valve is limited by its own technology and cannot be applied to ambient temperatures with large temperature differences and high refrigerant work. In the air conditioning system with harsh environmental conditions such as high pressure and large working pressure difference

For example, at low temperatures, the friction between the piston and the valve body is relatively large, and the actuation performance is poor, so it can only be used at an ambient temperature of -25°C.

Images