High-capacity four-way reversing valve

Abstract

The invention provides a high-capacity four-way reversing valve, comprising a main valve and a pilot valve. The main valve comprises a valve body and a piston arranged in the valve body; the valve body comprises a low-voltage exhaust pipe, a high-pressure intake pipe, a condensation pipe and an evaporation pipe which are arranged on the valve body; an oil inlet and an oil outlet are arranged on the valve body; the piston comprises a lubricant passage arranged on the piston and a pressure balance groove; the oil inlet and the oil outlet are communicated with the lubricant passage; the lubricant passage comprises a first lubricant groove, a second lubricant groove and a connection groove, wherein the first lubricant groove is arranged on a first outer side surface of the piston, the second lubricant groove is arranged on a third outer side surface of the piston, and the connection groove is arranged on the outer side surface of a connection part between the upper and the lower runners of the piston and connected with the first and the second lubricant grooves. The invention can effectively solve the problem of blocking between the piston and the valve body to ensure that the force bearing point between the piston and the valve body (namely, the cylinder body) has sufficient refrigeration oil to form an oil film; furthermore, the force at the force bearing point between the piston and the cylinder body is decreased to ensure that the piston can reverse normally in the cylinder body.

Description

Technical field [0001] The invention relates to a large-capacity four-way reversing valve. Background technique [0002] The large-capacity four-way valve usually consists of a main valve and a pilot valve. Such as figure 1 As shown, the main valve includes: a valve body 1 and a piston 2 movable in the valve body 1, a condensing pipe 30, an evaporation pipe 40, a high-pressure intake pipe 50, and a low-pressure exhaust pipe 60 arranged on the valve body 1. Both ends of the valve body 1 are provided with a first end cover 101 and a second end cover 102. Through anatomical analysis of the non-reversing valve body, it is found that the scratches are mostly located at the angle between the low-pressure exhaust pipe of the valve body and the condenser pipe. Sometimes between the angle between the low-pressure exhaust pipe and the evaporation pipe. Such as figure 2 As shown, when the scratches are on the end surface of the first end cover 101, the scratches are all located at the an...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to provide a large-capacity four-way reversing valve to solve the problems that the existing four-way reversing valve is difficult to form effective lubrication and cannot effectively solve the problem of piston and valve body being stuck.

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