Air conditioning system for realizing cold and heat reversing through three-way valve

Abstract

The utility model discloses a kind of air conditioning systems for realizing cold and hot reversing by three-way valve, including compressor, condenser and evaporator, and electronic expansion valve is connected on the refrigerant pipeline between condenser and evaporator;The refrigeration pipeline between the outlet of compressor and condenser is sequentially connected with first three-way valve and first check valve;Second three-way valve is connected on the refrigeration return pipeline between the return port of compressor and evaporator;First branch heating pipeline for heating refrigerant flow guide is branched connected between first three-way valve and evaporator, second check valve for preventing refrigerant backflow to the first three-way valve is also on first branch heating pipeline;The refrigeration pipeline between first check valve and condenser also has second branch heating return pipeline for heating refrigerant return, which is branched interface connected with second three-way valve;Reversing function of four-way valve is completely replaced by two three-way valves, avoid cold, hot gaseous refrigerant to gather in one place to produce energy exchange, reduce mutual heat loss.

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