Heat exchanger and heat exchange system

Abstract

A heat exchanger and a heat exchange system. The heat exchanger includes two heat exchange units, wherein each of the two heat exchange units includes a plurality of heat exchange flat pipes spaced from each other and a collecting pipe in communication with the heat exchange flat pipes, and the heat exchange flat pipes of the two heat exchange units are alternately arranged; and each of the heat exchange flat pipes includes a runner reentering along a length of a corresponding heat exchange flat pipe, an inlet and an outlet are provided at the same end of the corresponding heat exchange flat pipe, the heat exchange units include two collecting pipes, the collecting pipes are configured for communicating the inlet and the outlet, and the two collecting pipes of the same heat exchange unit are disposed at two opposite sides of the heat exchanger.

What is claimed is: 
     
         1 . A heat exchanger, comprising two heat exchange units, wherein each of the two heat exchange units comprises a plurality of heat exchange flat pipes spaced from each other and two collecting pipes in communication with the plurality of heat exchange flat pipes, and the plurality of heat exchange flat pipes of the two heat exchange units are alternately arranged; and
 each of the plurality of heat exchange flat pipes comprises a runner reentering along a length direction of corresponding one of the plurality of heat exchange flat pipes, an inlet of the runner and an outlet of the runner are disposed at the same end of the plurality of heat exchange flat pipes the two collecting pipes are in communication with a corresponding inlet of the runner and a corresponding outlet of the runner, and the two collecting pipes of the same heat exchange unit are disposed at two opposite sides of the heat exchanger.   
     
     
         2 . The heat exchanger of  claim 1 , wherein each of the two collecting pipes comprises a plurality of unit tubes being in communication with each other, the plurality of heat exchange flat pipes in each of the two heat exchange units are in communication with a corresponding unit tube; adjacent two of the plurality of unit tubes are directly snap-fitted with each other or in communication with each other via an intermedium tube. 
     
     
         3 . The heat exchanger of  claim 1 , wherein a longest distance between the two collecting pipes of the same heat exchange unit along a width direction of the plurality of heat exchange flat pipes is defined as w, the width of each of the plurality of heat exchange flat pipes is defined as W 1 , and the longest distance w between the two collecting pipes of the same heat exchange unit along the width direction of the plurality of heat exchange flat pipes is greater than the width W 1  of each of the plurality of heat exchange flat pipes satisfy. 
     
     
         4 . The heat exchanger of  claim 3 , wherein axes of the two collecting pipes of the same heat exchange unit are staggered with each other along a length direction of the plurality of heat exchange flat pipes, and the longest distance w between the two collecting pipes of the same heat exchange unit along the width direction of the plurality of heat exchange flat pipes and the width W 1  of each of the plurality of heat exchange flat pipes s satisfy a following formula: 
       
         
           
             
               
                 
                   0 
                   . 
                   7 
                 
                 ⁢ 
                 5 
               
               ≤ 
               
                 w 
                 
                   W 
                   1 
                 
               
               ≤ 
               
                 0.95 
                 . 
               
             
           
         
       
     
     
         5 . The heat exchanger of  claim 1 , wherein each of the two collecting pipes comprises a connector tube in communication with a corresponding collecting pipe, and the connector tubes of the heat exchanger are disposed at the same side of the heat exchanger; and the connector tubes of the two collecting pipes in each of the two heat exchange units bend towards each other. 
     
     
         6 . The heat exchanger of  claim 1 , wherein each of the two collecting pipes comprises a connector tube in communication with a corresponding collecting pipe; in the same one of the two heat exchange units, a pipe size of one of the two connector tubes is defined as OD 1 , and a pipe size of the other of the two connector tubes is defined as OD 2 , and the pipe size OD 1  of one of the two connector tubes and a pipe size OD 2  of the other of the two connector tubes satisfy a following formula: OD 1 <OD 2 ≤1.56×OD 1 . 
     
     
         7 . The heat exchanger of  claim 1 , wherein fins are provided between adjacent two of the plurality of heat exchange flat pipes, along a width direction of the plurality of heat exchange flat pipes, a side of the heat exchange unit is disposed at a windward side of an upstream of an airflow; and the two heat exchange units are independently configured as an evaporator or a condenser, and the inlet of the runner is disposed at the windward side. 
     
     
         8 . The heat exchanger of  claim 2 , wherein when the adjacent two of the plurality of unit tubes are in communication with each other via the intermedium tube, along a length of one of the two collecting pipes, a length of each of the plurality of unit tubes is defined as L 1 ; and a length of the intermedium tube is defined as L 2 , and the length L 1  of each of the plurality of unit tubes and the length L 2  of the intermedium tube satisfy a following formula: 1:2≤L 1 :L 2 ≤1:0.5. 
     
     
         9 . The heat exchanger of  claim 1 , wherein the two heat exchange units comprises a first heat exchange unit and a second heat exchange unit, the first heat exchange unit comprises plurality of first heat exchange flat pipes, the second heat exchange unit comprises plurality of second heat exchange flat pipes, each of the plurality of first heat exchange flat pipes comprises a first runner reentering along a length direction of a corresponding first heat exchange flat pipe, and an inlet of the first runner and an outlet of the first runner are provided at a first side of the two heat exchange units; each of the plurality of second heat exchange flat pipes comprises a second runner reentering along a length direction of a corresponding second heat exchange flat pipe, and an inlet of the second runner and an outlet of the second runner are provided at a second side of the two heat exchange units, and the first side of the two heat exchange units and the second side of the two heat exchange units are opposite to each other along a length direction of the two heat exchange units, wherein the plurality of first heat exchange flat pipes and the plurality of second heat exchange flat pipes are alternately arranged along a thickness direction thereof, and each of the plurality of first heat exchange flat pipes and corresponding one of the plurality of second heat exchange flat pipes are in contact with each other along the thickness directions thereof to form a heat exchange part. 
     
     
         10 . The heat exchanger of  claim 9 , wherein a plurality of heat exchange parts are arranged along a thickness direction of the plurality of first heat exchange flat pipes and spaced from each other, a thickness of each of the plurality of first heat exchange flat pipes is defined as h 1 , a thickness of each of the plurality of second heat exchange flat pipes is defined as h 2 , and a distance between adjacent two of the plurality of heat exchange parts is defined as h 3 , and the thickness h 1  of each of the plurality of first heat exchange flat pipes, the thickness h 2  of each of the plurality of second heat exchange flat pipes and the distance h 3  between adjacent two of the plurality of heat exchange parts satisfy a following formula: 2.6(h 1 +h 2 )≤h 3 ≤5.5(h 1 +h 2 ). 
     
     
         11 . The heat exchanger of  claim 9 , wherein the first runner comprises a plurality of first microchannels in parallel connection with each other, the second runner comprises a plurality of second microchannels in parallel connection with each other, the number of the plurality of first microchannels is defined as N, and the number of the plurality of second microchannels is defined as M, an area of a cross section of each of the plurality of first microchannels is equal to that of each of the plurality of second microchannels, and Nis not equal to M; optionally,
 the first runner comprises a plurality of first microchannels in parallel connection with each other, the second runner comprises a plurality of second microchannels in parallel connection with each other, the number of the plurality of first microchannels is defined as N, and the number of the plurality of second microchannels is defined as M, an area of a cross section of each of the plurality of first microchannels is different from that of each of the plurality of second microchannels, and N is equal to M,   wherein the number N of the plurality of first microchannels and the number M of the plurality of second microchannels satisfy with a following formula: 6≤N≤18, and 6≤M≤18.   
     
     
         12 . The heat exchanger of  claim 9 , wherein a width of each of the plurality of first heat exchange flat pipe is defined as W 2 , a width of each of the plurality of second heat exchange flat pipe is defined as W 3 , and the width W 2  of each of the plurality of first heat exchange flat pipe is different from the width W 3  of each of the plurality of second heat exchange flat pipe, and/or, a thickness of each of the plurality of first heat exchange flat pipe is defined as h 1 , a thickness of each of the plurality of second heat exchange flat pipe is defined as h 2 , and the thickness h 1  of each of the plurality of first heat exchange flat pipe is different from the thickness h 2  of each of the plurality of second heat exchange flat pipe;
 wherein the width W 2  of each of the plurality of first heat exchange flat pipe satisfy with a following formula: 26 mm≤W 2 ≤55 mm, the width W 3  of each of the plurality of second heat exchange flat pipe satisfy with a following formula: 26 mm≤W 3 ≤55 mm; the thickness h 1  of each of the plurality of first heat exchange flat pipe satisfy with a following formula: 1.2 mm≤h 1 ≤2.8 mm; the thickness h 2  of each of the plurality of second heat exchange flat pipe satisfy with a following formula: 1.2 mm≤h 2 ≤2.8 mm.   
     
     
         13 . The heat exchanger of  claim 9 , further comprising a first inlet pipe, a first outlet pipe, a second inlet pipe and a second outlet pipe, in each of the plurality of heat exchange parts, the inlet of the first runner is in communication with the first inlet pipe, the outlet of the first runner is in communication with the first outlet pipe, the inlet of the second runner is in communication with the second inlet pipe, and the outlet of the second runner is in communication with the second outlet pipe;
 along a length direction of the plurality of heat exchange parts, the first inlet pipe and the second inlet pipe are disposed at the first side of the two heat exchange units, and the first inlet pipe and the first outlet pipe are arranged in a staggered manner along a width direction of the plurality of heat exchange parts; and/or,   the second inlet pipe and the second outlet pipe are disposed at the second side of the two heat exchange units, and the second inlet pipe and the second outlet pipe are arranged in a staggered manner along the width direction of the plurality of heat exchange parts.   
     
     
         14 . The heat exchanger of  claim 13 , wherein each of the plurality of first heat exchange flat pipes comprises a main body of the first heat exchange flat pipe, an inlet connection portion of the first heat exchange flat pipe and an outlet connection portion of the first heat exchange flat pipe, and the inlet connection portion of the first heat exchange flat pipe and the outlet connection portion of the first heat exchange flat pipe are disposed at the same end of the first heat exchange flat pipe,
 and each of the plurality of second heat exchange flat pipes comprises a main body of the second heat exchange flat pipe, an inlet connection portion of the second heat exchange flat pipe and an outlet connection portion of the second heat exchange flat pipe, and the inlet connection portion of the second heat exchange flat pipe and the outlet connection portion of the second heat exchange flat pipe are disposed at the same end of the second heat exchange flat pipe,   in each of the plurality of heat exchange parts, the main body of the first heat exchange flat pipe is stacked with and welded to the main body of the second heat exchange flat pipe, the inlet connection portion of the first heat exchange flat pipe is snap-fitted with a unit tube of the first inlet pipe, the outlet connection portion of the first heat exchange flat pipe is snap-fitted with a unit tube corresponding to the first outlet pipe, the inlet connection portion of the second heat exchange flat pipe is snap-fitted with a corresponding unit tube of the second inlet pipe, and the outlet connection portion of the second heat exchange flat pipe is snap-fitted with a unit tube corresponding to the second outlet pipe,   wherein a pipe size of the first inlet pipe is different from a pipe size of the first outlet pipe; and/or,   a pipe size of the second inlet pipe is different from a pipe size of the second outlet pipe.   
     
     
         15 . A heat exchange system, comprising the heat exchanger of  claim 1 , wherein the two heat exchange units are configured to introduce heat exchange mediums, respectively; and the heat exchange medium is independently selected from a refrigerant or water.