Multi-loop plate heat exchanger

Abstract

Disclosed is a multi-loop plate heat exchanger, including: a plurality of heat exchange plates arranged in a stacked manner; heat exchange channels formed between adjacent heat exchange plates in the plurality of heat exchange plates; and port channels extending through the heat exchange plates and respectively used for inflow and outflow of a heat exchange medium, at least one of the port channels including at least two fluid channels which are separated from each other and used for inflow or outflow of at least two of multiple loops of refrigerant. The at least two fluid channels share one of the port channels, and the at least two fluid channels are arranged side by side in the radial direction of the port channel.

What is claimed is: 
     
         1 . A multi-loop plate heat exchanger, comprising: a plurality of heat exchange plates arranged in a stacked manner; heat exchange channels formed between two adjacent heat exchange plates in the plurality of heat exchange plates; and port channels extending through the heat exchange plates and respectively used for inflow and outflow of a heat exchange medium, at least one of the port channels comprising at least two fluid channels which are separated from each other and used for inflow or outflow of at least two of multiple loops of refrigerant, wherein the at least two fluid channels share one of the port channels, and the at least two fluid channels are arranged side by side in the radial direction of the port channel. 
     
     
         2 . The multi-loop plate heat exchanger as claimed in  claim 1 , wherein the at least two fluid channels are separated from each other by means of a separator. 
     
     
         3 . The multi-loop plate heat exchanger as claimed in  claim 2 , wherein at least part of the separator is integrally formed on the corresponding heat exchange plate or independent of the heat exchange plate. 
     
     
         4 . The multi-loop plate heat exchanger as claimed in  claim 2 , wherein the separator comprises a flanging bridge, which is formed by deformation in the region of the corresponding heat exchange plate in the port channel. 
     
     
         5 . The multi-loop plate heat exchanger as claimed in  claim 1 , wherein the at least two fluid channels include a first fluid channel for one of the at least two loops of refrigerant and a second fluid channel for the other of the at least two loops of refrigerant, the heat exchange channels include a first heat exchange channel for one of the at least two loops of refrigerant and a second heat exchange channel for the other of the at least two loops of refrigerant, and the first fluid channel is in fluid communication with the first heat exchange channel through a first fluid channel hole, and the second fluid channel is in fluid communication with the second heat exchange channel through a second fluid channel hole. 
     
     
         6 . The multi-loop plate heat exchanger as claimed in  claim 5 , wherein the first fluid channel holes and the second fluid channel holes are alternately arranged in the extension direction of the port channel. 
     
     
         7 . The multi-loop plate heat exchanger as claimed in  claim 5 , wherein the first fluid channel hole and the second fluid channel hole are located in the respective corresponding fluid channels. 
     
     
         8 . The multi-loop plate heat exchanger as claimed in  claim 5 , wherein at least one of the first fluid channel hole and the second fluid channel hole is provided in an annular member, and at least part of the annular member is integrally formed on the corresponding heat exchange plate or independent of the heat exchange plate. 
     
     
         9 . The multi-loop plate heat exchanger as claimed in  claim 8 , wherein the annular member comprises a flange, which is formed by deformation in the region of the corresponding heat exchange plate in the port channel. 
     
     
         10 . The multi-loop plate heat exchanger as claimed in  claim 8 , wherein part of the annular member is arranged in the first fluid channel, and the other part is arranged in the second fluid channel; the part, arranged in the second fluid channel, of the annular member provided with the first fluid channel hole blocks the second fluid channel and the first heat exchange channel; and/or the part, arranged in the first fluid channel, of the annular member provided with the second fluid channel hole blocks the first fluid channel and the second heat exchange channel. 
     
     
         11 . The multi-loop plate heat exchanger as claimed in  claim 8 , wherein the annular member provided with the first fluid channel hole is located between the adjacent heat exchange plates that form the first heat exchange channel; and/or the annular member provided with the second fluid channel hole is located between the adjacent heat exchange plates that form the second heat exchange channel. 
     
     
         12 . The multi-loop plate heat exchanger as claimed in  claim 8 , wherein the separator comprises a plurality of baffles which are arranged in the annular member, with ends of the plurality of baffles being connected so as to separate the at least one port channel into the at least two fluid channels. 
     
     
         13 . The multi-loop plate heat exchanger as claimed in  claim 1 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant. 
     
     
         14 . The multi-loop plate heat exchanger as claimed in  claim 3 , wherein the separator comprises a flanging bridge, which is formed by deformation in the region of the corresponding heat exchange plate in the port channel. 
     
     
         15 . The multi-loop plate heat exchanger as claimed in  claim 2 , wherein the at least two fluid channels include a first fluid channel for one of the at least two loops of refrigerant and a second fluid channel for the other of the at least two loops of refrigerant, the heat exchange channels include a first heat exchange channel for one of the at least two loops of refrigerant and a second heat exchange channel for the other of the at least two loops of refrigerant, and the first fluid channel is in fluid communication with the first heat exchange channel through a first fluid channel hole, and the second fluid channel is in fluid communication with the second heat exchange channel through a second fluid channel hole. 
     
     
         16 . The multi-loop plate heat exchanger as claimed in  claim 2 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant. 
     
     
         17 . The multi-loop plate heat exchanger as claimed in  claim 3 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant. 
     
     
         18 . The multi-loop plate heat exchanger as claimed in  claim 6 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant. 
     
     
         19 . The multi-loop plate heat exchanger as claimed in  claim 7 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant. 
     
     
         20 . The multi-loop plate heat exchanger as claimed in  claim 8 , further comprising: a port connector connected to the at least one port channel, the port connector comprising at least two connection channels separated by a separation plate, the at least two connection channels being respectively corresponding to and in communication with the at least two fluid channels, thereby forming two passages isolated from each other for inflow or outflow of the refrigerant.