Air-conditioning system with mixed working medium

Abstract

The application provides an air-conditioning system with mixed working medium, including: a compressor, and a first heat exchanger, wherein the first heat exchanger is communicated with an exhaust port of the compressor, the first heat exchanger is provided with a first flow channel communicated with a first inlet end and a second flow channel communicated with a first outlet end, and a first gas-liquid separator is further connected between the first flow channel and the second flow channel; and the first gas-liquid separator includes a first inlet, a first liquid outlet and a first gas outlet, the first inlet is communicated with the first flow channel, the first gas outlet is communicated with the second flow channel, and a liquid flowing out of the first liquid outlet is capable of being throttled and heated and then connected to a gas supplement port of the compressor for gas supplement. The application enables more high-boiling point refrigerant working medium entering the first heat exchanger to improve condensation performance, and further increases the amount of low-boiling point refrigerant working medium entering the second heat exchanger to improve evaporation performance, thereby solving the problem of poor gas supplement effect of a gas supplement system with mixed working medium, and improving the performance of the air-conditioning system.

1 . An air-conditioning system with mixed working medium, comprising:
 a compressor ( 1 ); and a first heat exchanger ( 2 ), wherein the first heat exchanger ( 2 ) is communicated with an exhaust port ( 11 ) of the compressor ( 1 ), the first heat exchanger ( 2 ) is provided with a first inlet end ( 21 ) and a first outlet end ( 22 ), and an interior of the first heat exchanger ( 2 ) is provided with flow channels capable of allowing the mixed working medium to flow, comprising a first flow channel ( 23 ) communicated with the first inlet end ( 21 ) and a second flow channel ( 24 ) communicated with the first outlet end ( 22 ), and a first gas-liquid separator ( 3 ) is arranged between the first flow channel ( 23 ) and the second flow channel ( 24 ); and the first gas-liquid separator ( 3 ) comprises a first inlet ( 31 ), a first liquid outlet ( 32 ) and a first gas outlet ( 33 ), the first inlet ( 31 ) is communicated with the first flow channel ( 23 ), the first gas outlet ( 33 ) is communicated with the second flow channel ( 24 ), and a liquid flowing out of the first liquid outlet ( 32 ) is capable of being throttled and heated and then connected to a gas supplement port ( 12 ) of the compressor ( 1 ) for gas supplement.   
     
     
         2 . The air-conditioning system according to  claim 1 , wherein the first liquid output ( 32 ) is further connected with a first branch ( 100 ), and the first branch ( 100 ) is provided with a first throttling device ( 4 ), and the exhaust port ( 11 ) of the compressor ( 1 ) and the first inlet end ( 21 ) of the first heat exchanger ( 2 ) are connected through a first pipeline ( 200 ). 
     
     
         3 . The air-conditioning system according to  claim 2 , further comprising a second gas-liquid separator ( 7 ), wherein the second gas-liquid separator ( 7 ) comprises a second inlet ( 71 ), a second liquid output ( 72 ) and a second gas outlet ( 73 ), and the second inlet ( 71 ) is connected with the first branch ( 100 ), so that a fluid throttled by the first throttling device ( 4 ) enters the second gas-liquid separator ( 7 ), and the second gas outlet ( 73 ) is connected with the gas supplement port ( 12 ) of the compressor ( 1 ). 
     
     
         4 . The air-conditioning system according to  claim 3 , wherein the first outlet end ( 22 ) of the first heat exchanger ( 2 ) is connected with a second pipeline ( 300 ), and a partial section ( 300   a ) of the second pipeline ( 300 ) penetrates into the second gas-liquid separator ( 7 ) so as to heat the fluid in the second gas-liquid separator ( 7 ). 
     
     
         5 . The air-conditioning system according to  claim 4 , further comprising a second heat exchanger ( 8 ), wherein a second throttling device ( 5 ) is further arranged on the second pipeline ( 300 ) in a downstream section of the second gas-liquid separator ( 7 ) along a fluid flow direction, and the second pipeline ( 300 ) passing through the second throttling device ( 5 ) is capable of being connected to a second inlet end ( 81 ) of the second heat exchanger ( 8 ). 
     
     
         6 . The air-conditioning system according to  claim 5 , further comprising a second branch ( 400 ), wherein the second branch ( 400 ) is communicated with the second liquid outlet ( 72 ) of the second gas-liquid separator ( 7 ), and the second branch ( 400 ) is further provided with a third throttling device ( 6 ), and the second branch ( 400 ) is communicated with the third throttling device ( 6 ) and then connected with the second inlet end ( 81 ) of the second heat exchanger ( 8 ). 
     
     
         7 . The air-conditioning system according to  claim 6 , wherein one second heat exchanger ( 8 ) is provided, and the second pipeline ( 300 ) is communicated with the second branch ( 400 ) and then connected to the second inlet end ( 81 ) of the second heat exchanger ( 8 ), and a second outlet end ( 82 ) of the second heat exchanger ( 8 ) is connected to a gas inlet ( 13 ) of the compressor ( 1 ). 
     
     
         8 . The air-conditioning system according to  claim 6 , wherein the second heat exchanger ( 8 ) comprises a second heat exchanger A( 8 A) and a second heat exchanger B( 8 B), and the second heat exchanger A( 8 A) and the second heat exchanger B( 8 B) are arranged side by side, the second heat exchanger A( 8 A) is located at an upstream side of the second heat exchanger B( 8 B) in an air flow direction, and the second branch ( 400 ) is connected to a second inlet end A( 8 A 1 ) of the second heat exchanger A( 8 A), the second pipeline ( 300 ) is connected to a second inlet end B( 8 B 1 ) of the second heat exchanger B( 8 B), and a second outlet end A( 8 A 2 ) of the second heat exchanger A( 8 A) is connected with a second outlet end B( 8 B 2 ) of the second heat exchanger B( 8 B) and then connected to a gas inlet ( 13 ) of the compressor ( 1 ). 
     
     
         9 . The air-conditioning system according to  claim 6 , wherein the second heat exchanger ( 8 ) comprises a second heat exchanger A( 8 A) and a second heat exchanger B( 8 B), wherein the second pipeline ( 300 ) is connected to a second inlet end B( 8 B 1 ) of the second heat exchanger B( 8 B), a second outlet end B( 8 B 2 ) of the second heat exchanger B( 8 B) is communicated with the second branch ( 400 ) and then connected with a second inlet end A( 8 A 1 ) of the second heat exchanger A( 8 A), and a second outlet end A( 8 A 2 ) of the second heat exchanger A( 8 A) is connected with a gas inlet ( 13 ) of the compressor ( 1 ). 
     
     
         10 . The air-conditioning system according to  claim 2 , further comprising a third heat exchanger ( 9 ), wherein the third heat exchanger ( 9 ) comprises a third inlet ( 91 ) and a third outlet ( 92 ), the third inlet ( 91 ) is connected with the first branch ( 100 ), so that the fluid throttled by the first throttling device ( 4 ) enters the third heat exchanger ( 9 ), and the third outlet ( 92 ) is connected with the gas supplement port ( 12 ) of the compressor ( 1 ). 
     
     
         11 . The air-conditioning system according to  claim 10 , wherein the first outlet end ( 22 ) of the first heat exchanger ( 2 ) is connected with a second pipeline ( 300 ), and a partial section ( 300   a ) of the second pipeline ( 300 ) penetrates into the third heat exchanger ( 9 ) so as to heat the fluid in the third heat exchanger ( 9 ). 
     
     
         12 . The air-conditioning system according to  claim 11 , further comprising a second heat exchanger ( 8 ), wherein a second throttling device ( 5 ) is further arranged on the second pipeline ( 300 ) in a downstream section of the third heat exchanger ( 9 ) along a fluid flow direction, and the second pipeline ( 300 ) passing through the second throttling device ( 5 ) is capable of being connected to a second inlet end ( 81 ) of the second heat exchanger ( 8 ), and a second outlet end ( 82 ) of the second heat exchanger ( 8 ) is connected to a gas inlet ( 13 ) of the compressor ( 1 ). 
     
     
         13 . The air-conditioning system according to  claim 12 , wherein the first flow channel ( 23 ) and the second flow channel ( 24 ) in the first heat exchanger ( 2 ) are in single-row structures; or, the first flow channel ( 23 ) and the second flow channel ( 24 ) in the first heat exchanger ( 2 ) are both in structures of more than two rows, a liquid gathering pipe is further arranged between more than two rows of the first flow channels ( 23 ) and the first gas-liquid separator ( 3 ), and a gas distributing pipe is further arranged between more than two rows of the second flow channels ( 24 ) and the first gas-liquid separator ( 3 ). 
     
     
         14 . The air-conditioning system according to  claim 13 , wherein a position of the first flow channel ( 23 ) on the first heat exchanger ( 2 ) connected with the liquid gathering pipe is set within a range of 0.1 to 0.9 of a length ratio of a whole flow channel formed by the first flow channel ( 23 ) and the second flow channel ( 24 ). 
     
     
         15 . The air-conditioning system according to  claim 14 , wherein the first heat exchanger ( 2 ) is further provided with a first fan; when the second heat exchanger ( 8 ) is further comprised, the second heat exchanger ( 8 ) is further provided with a second fan. 
     
     
         16 . An air-conditioning system with mixed working medium, comprising:
 a compressor ( 1 ); and a first heat exchanger ( 2 ), wherein the first heat exchanger ( 2 ) is communicated with an exhaust port ( 11 ) of the compressor ( 1 ), the first heat exchanger ( 2 ) is provided with a first inlet end ( 21 ) and a first outlet end ( 22 ), and an interior of the first heat exchanger ( 2 ) is provided with flow channels capable of allowing the mixed working medium to flow, comprising a first flow channel ( 23 ) communicated with the first inlet end ( 21 ) and a second flow channel ( 24 ) communicated with the first outlet end ( 22 ), and a first gas-liquid separator ( 3 ) is arranged between the first flow channel ( 23 ) and the second flow channel ( 24 ); and the first gas-liquid separator ( 3 ) comprises a first inlet ( 31 ), a first liquid outlet ( 32 ) and a first gas outlet ( 33 ), the first inlet ( 31 ) is communicated with the first flow channel ( 23 ), the first gas outlet ( 33 ) is communicated with the second flow channel ( 24 ), and a liquid flowing out of the first liquid outlet ( 32 ) is capable of being throttled and heated and then connected to a gas supplement port ( 12 ) of the compressor ( 1 ) for gas supplement; and   wherein the first flow channel ( 23 ) and the second flow channel ( 24 ) in the first heat exchanger ( 2 ) are in single-row structures; or, the first flow channel ( 23 ) and the second flow channel ( 24 ) in the first heat exchanger ( 2 ) are both in structures of more than two rows, a liquid gathering pipe is further arranged between more than two rows of the first flow channels ( 23 ) and the first gas-liquid separator ( 3 ), and a gas distributing pipe is further arranged between more than two rows of the second flow channels ( 24 ) and the first gas-liquid separator ( 3 ).   
     
     
         17 . An air-conditioning system with mixed working medium, comprising:
 a compressor ( 1 ); and a first heat exchanger ( 2 ), wherein the first heat exchanger ( 2 ) is communicated with an exhaust port ( 11 ) of the compressor ( 1 ), the first heat exchanger ( 2 ) is provided with a first inlet end ( 21 ) and a first outlet end ( 22 ), and an interior of the first heat exchanger ( 2 ) is provided with flow channels capable of allowing the mixed working medium to flow, comprising a first flow channel ( 23 ) communicated with the first inlet end ( 21 ) and a second flow channel ( 24 ) communicated with the first outlet end ( 22 ), and a first gas-liquid separator ( 3 ) is arranged between the first flow channel ( 23 ) and the second flow channel ( 24 ); and the first gas-liquid separator ( 3 ) comprises a first inlet ( 31 ), a first liquid outlet ( 32 ) and a first gas outlet ( 33 ), the first inlet ( 31 ) is communicated with the first flow channel ( 23 ), the first gas outlet ( 33 ) is communicated with the second flow channel ( 24 ), and a liquid flowing out of the first liquid outlet ( 32 ) is capable of being throttled and heated and then connected to a gas supplement port ( 12 ) of the compressor ( 1 ) for gas supplement; and   wherein the first heat exchanger ( 2 ) is further provided with a first fan; when the second heat exchanger ( 8 ) is further comprised, the second heat exchanger ( 8 ) is further provided with a second fan.