Capacity-Increasing Device For Four-Way Valve In Air Conditioning System And The Air Conditioning System

Abstract

A capacity-increasing device for a four-way valve, the four-way valve has a first port, a second port, a third port and a fourth port, wherein first port is connected with an output end of a compressor via a first line, second port is connected with an input end of the compressor via a second line, third port is connected with a first heat exchanger via a third line, and fourth port is connected with a second heat exchanger via a fourth line, the capacity-increasing device includes a first bypass line and a first valve, the first bypass line connected between third line and second line, the first valve in the first bypass line, a second bypass line and a second valve, the second bypass line connected between fourth line and second line, the second valve in the second bypass line.

1 . A capacity-increasing device for a four-way valve in an air conditioning system, the four-way valve has a first port, a second port, a third port and a fourth port, wherein the first port is connected with an output end of a compressor in the air conditioning system via a first line, the second port is connected with an input end of the compressor via a second line, the third port is connected with a first heat exchanger in the air conditioning system via a third line, and the fourth port is connected with a second heat exchanger in the air conditioning system via a fourth line, characterized in that, the capacity-increasing device comprises:
 a first bypass line and a first valve, wherein the first bypass line is connected between the third line and the second line, the first valve is arranged in the first bypass line and has an on position and an off position, a refrigerant in the air conditioning system runs through the first bypass line at the on position of the first valve when the air conditioning system is in a refrigeration mode, and the refrigerant is prevented from running through the first bypass line at the off position of the first valve when the air conditioning system is in a heating mode; and/or   a second bypass line and a second valve, wherein the second bypass line is connected between the fourth line and the second line, the second valve is arranged in the second bypass line and has an on position and an off position, the refrigerant in the air conditioning system runs through the second bypass line at the on position of the second valve when the air conditioning system is in the heating mode, and the refrigerant is prevented from running through the second bypass line at the off position of the second valve when the air conditioning system is in the refrigeration mode.   
     
     
         2 . The capacity-increasing device of  claim 1 , characterized in that, the first valve is an electromagnetic valve or an electric ball valve. 
     
     
         3 . The capacity-increasing device of  claim 1 , characterized in that, the second valve is an electromagnetic valve or an electric ball valve. 
     
     
         4 . The capacity-increasing device of  claim 1 , characterized in that, the first heat exchanger is a shell-tube type heat exchanger, a sleeve type heat exchanger or a plate type heat exchanger. 
     
     
         5 . The capacity-increasing device of  claim 1 , characterized in that, the second heat exchanger is a fin heat exchanger or a micro passage heat exchanger. 
     
     
         6 . The capacity-increasing device of  claim 1 , characterized in that, the compressor is a screw compressor, a turbine compressor, a reciprocating compressor or a rotor compressor. 
     
     
         7 . An air conditioning system, characterized in that, the air conditioning system is equipped with a capacity-increasing device as that for a four-way valve in an air conditioning system in any of  claim 1 . 
     
     
         8 . The air conditioning system of  claim 7 , characterized in that, the air conditioning system further comprises an oil separator disposed in the first line. 
     
     
         9 . The air conditioning system of  claim 7 , characterized in that, the air conditioning system further comprises a gas-liquid separator disposed in the second line. 
     
     
         10 . The air conditioning system of  claim 7 , characterized in that, the air conditioning system further comprises a reservoir disposed between the first heat exchanger and the second heat exchanger. 
     
     
         11 . The air conditioning system of  claim 7 , characterized in that, the air conditioning system further comprises a dry filter disposed between the first heat exchanger and the second heat exchanger. 
     
     
         12 . The air conditioning system of  claim 7 , characterized in that, the air conditioning system further comprises an economizer disposed between the first heat exchanger and the second heat exchanger, and the economizer is connected with a central air supply port on the compressor.