Heat exchanger and air-conditioning system

Abstract

Embodiments of the present invention disclose a heat exchanger and an air-conditioning system. The heat exchanger includes heat exchange tubes. The heat exchange tubes include first heat exchange tubes configured to form a first circuit, and second heat exchange tubes configured to form a second circuit. With the heat exchanger according to the embodiments of the present invention, if one of two circuits of a two-circuit air-conditioning system is turned off, a heat exchange efficiency of the heat exchanger can be improved.

What is claimed is: 
     
         1 . A heat exchanger comprising:
 heat exchange tubes,   wherein the heat exchange tubes comprise first heat exchange tubes configured to form a first circuit, and second heat exchange tubes configured to form a second circuit.   
     
     
         2 . The heat exchanger of  claim 1 , wherein:
 the first heat exchange tubes have a greater total heat exchange capability than the second heat exchange tubes.   
     
     
         3 . The heat exchanger of  claim 2 , further comprising:
 first fins, at least a portion of each of which extends in a first direction, which are arranged in a row in a second direction perpendicular to the first direction, and which are arranged alternately with the heat exchange tubes.   
     
     
         4 . The heat exchanger of  claim 3 , wherein:
 first heat exchange tube sets each composed of at least one of the first heat exchange tubes, and second heat exchange tube sets each composed of at least one of the second heat exchange tubes are arranged alternately in the second direction.   
     
     
         5 . The heat exchanger of  claim 3 , wherein:
 the first heat exchange tubes, the second heat exchange tubes, and the first fins are aligned, on at least one side in a third direction perpendicular to both the first direction and the second direction, with one another in the second direction.   
     
     
         6 . The heat exchanger of  claim 4 , wherein:
 a number of the first heat exchange tubes is greater than a number of the second heat exchange tubes,   the first heat exchange tube has a greater length than the second heat exchange tube,   the first heat exchange tube has a greater width than the second heat exchange tube,   the first heat exchange tube has a greater thickness than the second heat exchange tube, and/or   a total cross sectional area of internal channels of the first heat exchange tube is greater than a total cross sectional area of internal channels of the second heat exchange tube.   
     
     
         7 . The heat exchanger of  claim 3 , wherein:
 the heat exchange tubes are arranged in the second direction such that a plurality of same repeating units are arranged in the second direction, each of the repeating units is composed of a predetermined number of heat exchange tubes, and in each of the repeating units, the first heat exchange tubes and the second heat exchange tubes are arranged alternately in the second direction.   
     
     
         8 . The heat exchanger of  claim 7 , wherein:
 each of the repeating units is composed of three first heat exchange tubes and two second heat exchange tubes, and each of the two second heat exchange tubes is located between two adjacent ones of the three first heat exchange tubes;   each of the repeating units is composed of two first heat exchange tubes and one second heat exchange tube, and the one second heat exchange tube is located between the two first heat exchange tubes; or   each of the repeating units is composed of four first heat exchange tubes and three second heat exchange tubes, and each of the three second heat exchange tubes is located between two adjacent ones of the four first heat exchange tubes.   
     
     
         9 . The heat exchanger of  claim 3 , wherein:
 the first heat exchange tube comprises: a first heat exchange tube part and a second heat exchange tube part arranged in a third direction perpendicular to both the first direction and the second direction; and a connection part connecting and fluidly communicating the first heat exchange tube part and the second heat exchange tube part with each other, and the first heat exchange tube part and the second heat exchange tube part are in contact with a same first fin located on one side of the first heat exchange tube part and the second heat exchange tube part in the second direction and are in contact with a same first fin located on the other side of the first heat exchange tube part and the second heat exchange tube part in the second direction.   
     
     
         10 . The heat exchanger of  claim 2 , further comprising:
 first fins, at least a portion of each of which extends in a first direction, and which are arranged in a row in a second direction perpendicular to the first direction; and   second fins, at least a portion of each of which extends in the first direction, and which are arranged in a row in the second direction perpendicular to the first direction,   wherein the first heat exchange tube comprises: a first heat exchange tube part and a second heat exchange tube part arranged in a third direction perpendicular to both the first direction and the second direction; and a connection part connecting and fluidly communicating the first heat exchange tube part and the second heat exchange tube part with each other,   wherein the first fins and a first set of heat exchange tubes composed of both the first heat exchange tube parts and the second heat exchange tubes are arranged alternately in a row in the second direction perpendicular to the first direction, and   wherein the second fins and a second set of heat exchange tubes composed of the second heat exchange tube parts are arranged alternately in a row in the second direction perpendicular to the first direction.   
     
     
         11 . The heat exchanger of  claim 9 , wherein:
 the first heat exchange tube part, the second heat exchange tube part, and the connection part of the first heat exchange tube are formed by bending a single heat exchange tube.   
     
     
         12 . The heat exchanger of  claim 2 , further comprising:
 first manifolds respectively disposed at two ends of each of the first heat exchange tubes; and   second manifolds respectively disposed at two ends of each of the second heat exchange tubes.   
     
     
         13 . The heat exchanger of  claim 2 , wherein:
 the first fin has a same size in a third direction perpendicular to both the first direction and the second direction as a bigger one of a portion of the first heat exchange tube in contact with the first fin and a portion of the second heat exchange tube in contact with the first fin.   
     
     
         14 . The heat exchanger of  claim 1 , further comprising:
 first fins, at least a portion of each of which extends in a first direction, which are arranged in a row in a second direction perpendicular to the first direction, and which are arranged alternately with the heat exchange tubes,   wherein the heat exchanger is bent in an L shape, a U shape, or a C shape when viewed in the second direction.   
     
     
         15 . An air-conditioning system comprising:
 the heat exchanger of  claim 1 .   
     
     
         16 . The heat exchanger of  claim 5 , wherein:
 a number of the first heat exchange tubes is greater than a number of the second heat exchange tubes,   the first heat exchange tube has a greater length than the second heat exchange tube,   the first heat exchange tube has a greater width than the second heat exchange tube,   the first heat exchange tube has a greater thickness than the second heat exchange tube, and/or   a total cross sectional area of internal channels of the first heat exchange tube is greater than a total cross sectional area of internal channels of the second heat exchange tube.   
     
     
         17 . The heat exchanger of  claim 10 , wherein:
 the first heat exchange tube part, the second heat exchange tube part, and the connection part of the first heat exchange tube are formed by bending a single heat exchange tube.   
     
     
         18 . The heat exchanger of  claim 3 , further comprising:
 first manifolds respectively disposed at two ends of each of the first heat exchange tubes; and   second manifolds respectively disposed at two ends of each of the second heat exchange tubes.   
     
     
         19 . The heat exchanger of  claim 3 , wherein:
 the first fin has a same size in a third direction perpendicular to both the first direction and the second direction as a bigger one of a portion of the first heat exchange tube in contact with the first fin and a portion of the second heat exchange tube in contact with the first fin.   
     
     
         20 . The heat exchanger of  claim 2 , further comprising:
 first fins, at least a portion of each of which extends in a first direction, which are arranged in a row in a second direction perpendicular to the first direction, and which are arranged alternately with the heat exchange tubes,   wherein the heat exchanger is bent in an L shape, a U shape, or a C shape when viewed in the second direction.