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 in the air conditioning system, including the main valve body (1) and the first pilot valve (2), the main valve body (1) includes port C, port D, port E and port S, the first pilot valve (2) ) includes port C', port D', port E' and port S', the port C' of the first pilot valve (2) is connected to the first spool of the main valve body (1) through the first signal pipe (3) At the driving end, the interface E' of the first pilot valve (2) is connected to the second spool driving end of the main valve body (1) through the second signal pipe (4), and the interface S' of the first pilot valve (2) is connected to There is a fourth signal pipe (6), and the other end of the fourth signal pipe (6) is used to be connected to the pipeline between the gas-liquid separator (16) of the air conditioning system and the suction port of the compressor (14). According to the four-way valve of the present invention, liquid accumulation at the driving end of the valve core of the four-way valve can be effectively avoided, and the switching efficiency of the four-way valve can be ensured.

Description

Technical field [0001] The present invention relates to the technical field of refrigeration equipment, in particular to a four-way valve and air conditioning system. Background [0002] The four-way valve is set in the heat pump type air conditioning system to change the flow direction of the refrigerant, to achieve the purpose of refrigeration, heating switching, and in the heating mold, through the four-way valve switch for defrosting. [0003] Four-way valves generally adjust the position of the spool through the pilot valve, the pilot valve has four interfaces, D', E', C', and S', the four-way valve has four interfaces, D, E, C, S, where interface C' is connected to the first spool drive end of the four-way valve through the first signal tube, interface E' is connected to the second spool drive end of the four-way valve through the second signal tube, interface D' is connected to interface D through the third signal tube, and interface S' is connected to the port of interfac...

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

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