Four-way valve and air conditioning system

Abstract

The invention provides a four-way valve and an air conditioning system. The four-way valve is used for the air conditioning system. The four-way valve comprises a main valve body (1) and a first pilotvalve (2), wherein the main valve body (1) comprises a connector C, a connector D, a connector E and a connector S and the first pilot valve (2) comprises a connector C', a connector D', a connectorE' and a connector S'; the connector C' of the first pilot valve (2) is connected to a first valve element driving end of the main valve body (1) through a first signal pipe (3); the connector E' of the first pilot valve (2) is connected to a second valve element driving end of the main valve body (1) through a second signal pipe (4), the connector S' of the first pilot valve (2) is connected witha fourth signal pipe (6), and the other end of the fourth signal pipe (6) is used for being connected to a pipeline between a gas-liquid separator (16) of the air conditioning system and an air suction port of a compressor (14). According to the invention, liquid accumulation at the ends of valve element driving ends of the four-way valve can be effectively avoided, and the switching efficiency of the four-way valve is guaranteed.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a four-way valve and an air conditioning system. Background technique [0002] The four-way valve is set in the heat pump air-conditioning system to change the flow direction of the refrigerant to achieve the purpose of switching between cooling and heating, and in the heating mode, switch through the four-way valve for defrosting. [0003] The four-way valve generally adjusts the position of the spool through the pilot valve, the pilot valve has four ports, D', E', C', and S', and the four-way valve has four ports, D, E, C, S , where interface C' is connected to the first spool driving end of the four-way valve through the first signal tube, interface E' is connected to the second spool driving end of the four-way valve through the second signal tube, and interface D' is connected to the third spool driving end through the third The signal pipe is connected to t...

AI Technical Summary

Problems solved by technology

[0004] When the system defrosts, a large amount of high-pressure liquid refrigerant is stored in the wind-side heat exchanger. After the defrosting is completed, the four-way valve is switched, and when the piston moves to the middle section of the cylinder, the high-pressure liquid refrigerant in the wind-side heat exchanger passes through The C tube returns to the S tube, and then passes through the fourth signal tube, the pilot valve, and the first signal tube to the A chamber, so that the liquid in the A chamber is accumulated. Because the liquid refrigerant is incompressible and cannot be discharged in time, the switching time of the four-way valve becomes longer. , causing the unit to alarm and shut down due to low pressure difference

Images