Micro-channel structure for heat exchanger and integrated type micro-channel heat exchanger

Abstract

A micro-channel structure for a heat exchanger is formed between multiple layers of heat exchange plates arranged in a stacked manner, with a plurality of fin units formed on the heat exchange plate. The fin units are arranged uniformly into a plurality of fin unit groups in the direction perpendicular to a flow direction of fluid, and the fin unit groups are arranged in a staggered manner and spaced from one another by a distance in the flow direction of the fluid. A rear end of the fin unit at the upstream side is arranged in an intermediate position between two adjacent fin units at the downstream side; the fin unit includes at least two fins, with the adjacent fins spaced from each other by a distance; and the fluid channels between the adjacent fin units and between the adjacent fins form the micro-channel structure.

1 . A micro-channel structure for a heat exchanger, wherein, the micro-channel structure is formed between multiple layers of heat exchange plates arranged in a stacked manner, with a plurality of fin units formed on the heat exchange plate, the fin units are arranged uniformly into a plurality of fin unit groups in the direction perpendicular to a flow direction of fluid, and the fin unit groups are arranged in a staggered manner and spaced from one another by a distance in the flow direction of the fluid; a rear end of a fin unit at the upstream side is arranged in an intermediate position between two adjacent fin units at the downstream side; the fin unit comprises at least two fins, with the adjacent fins spaced from each other by a distance; and the fluid channels between the adjacent fin units and between the adjacent fins form the micro-channel structure. 
     
     
         2 . The micro-channel structure of  claim 1 , wherein, an external contour of the fin unit is rectilinear shaped or curvilinear shaped. 
     
     
         3 . The micro-channel structure of  claim 1 , wherein, tilt directions of the adjacent fin unit groups relative to the flow direction of the fluid are opposite, and an intersection angle between each fin unit thereof and the flow direction of the fluid is 45°≦α≦55°. 
     
     
         4 . The micro-channel structure of  claim 1 , wherein, each two fin units adjacent along the flow direction of the fluid constitute a fin unit subgroup, with the two fin units thereof spaced from each other by a distance of a≦2 mm in the flow direction of the fluid and by a distance of b≦2 mm in the direction perpendicular to the flow direction of the fluid; two adjacent fin unit subgroups are spaced apart by a distance that is ≧2a in the flow direction of the fluid, and two adjacent fin unit subgroups are spaced apart by a distance that is ≧2b in the direction perpendicular to the flow direction of the fluid. 
     
     
         5 . The micro-channel structure of  claim 1 , wherein, the fin unit has a length of L≦2.5 mm in the flow direction of the fluid and a width of h≦1.5 mm in the direction perpendicular to the flow direction of the fluid, and the fin has a thickness of δ≦0.5 mm. 
     
     
         6 . The micro-channel structure of  claim 1 , wherein, the fins that form the fin unit include main edges which form an external contour of the fin unit and sub edges which adjoin the main edges, the sub edges of the adjacent fins are parallel to each other and spaced from each other by a distance of 0.05 mm≦t≦0.35 mm, and an intersection angle between each sub edge and the flow direction of the fluid is 0°≦β≦15°. 
     
     
         7 . The micro-channel structure of  claim 1 , wherein, an external contour of the fin unit is an S-shaped curve with a straight middle segment, and the fin unit comprises a front fin, a rear fin and an intermediate fin which is parallelogram shaped and is arranged between the front fin and the rear fin. 
     
     
         8 . The micro-channel structure of  claim 1 , wherein, an external contour of the fin unit is rectilinear shaped, and the fin unit comprises three parallelogram-shaped fins, with a circular arc transition segment at each obtuse angle of each of the parallelogram-shaped fins. 
     
     
         9 . The micro-channel structure of  claim 1 , wherein, the micro-channel structure comprises a diversion segment, a heat exchange segment and a confluence segment arranged successively along the flow direction of the fluid, and the adjacent fin units of the diversion segment as well as those of the confluence segment are spaced apart by a larger distance in the flow direction of the fluid than the adjacent fin units of the heat exchange segment. 
     
     
         10 . The micro-channel structure of  claim 1 , wherein, the fins on the heat exchange plate are formed by light etching molding. 
     
     
         11 . An integrated type micro-channel heat exchanger, wherein, comprising multiple layers of heat exchange plates arranged in a stacked manner, with a plurality of fin units foamed on the heat exchange plate, the fin units are arranged uniformly into a plurality of fin unit groups in the direction perpendicular to a flow direction of a fluid, and the fin unit groups are arranged in a staggered manner and spaced from one another by a distance in the flow direction of fluid; a rear end of a fin unit at the upstream side is arranged in an intermediate position between two adjacent fin units at the downstream side; the fin unit comprises at least two fins, with the adjacent fins spaced from each other by a distance; the fluid channels between the adjacent fin units and between the adjacent fins form a micro-channel structure; working fluid micro-channels and cooling agent micro-channels are alternately arranged in the direction perpendicular to a plate plane of the heat exchange plates, wherein a diversion segment and an inlet in communication with a fluid inflow pipeline are provided in the micro-channel structure at the upstream side of the flowing fluid, and a confluence segment and an outlet in communication with a fluid outflow pipeline are provided in the micro-channel structure at the downstream side of the flowing fluid; the inlets and the outlets of multiple layers of the working fluid micro-channels are intercommunicated; and the inlets and the outlets of multiple layers of the cooling agent micro-channels are intercommunicated. 
     
     
         12 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the fins are formed on one side of each heat exchange plate, and the fin-side of a heat exchange plate and the plane-side of another adjacent heat exchange plate are combined to form the micro-channel structure. 
     
     
         13 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the fins are formed on one side of each heat exchange plate, and the fin-sides of adjacent heat exchange plates are combined to form the micro-channel structure. 
     
     
         14 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the fins are formed on both sides of each heat exchange plate, with fins on one side forming the working fluid micro-channels and fins on the other side forming the cooling agent micro-channels. 
     
     
         15 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, an external contour of the fin unit is rectilinear shaped or curvilinear shaped, and an intersection angle between each fin unit and the flow direction of the fluid is 45°α≦ 55 °. 
     
     
         16 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, an external contour of the fin unit is an S-shaped curve with a straight middle segment, and the fin unit comprises two fins which are spaced from each other by a distance of 0.05 mm≦t≦0.35 mm; an intersection angle between each intermediate edge of the fins and the flow direction of the fluid is 0°≦β≦15°. 
     
     
         17 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, an external contour of the fin unit is rectilinear shaped, and the fin unit comprises three parallelogram-shaped fins, with a circular arc transition segment at each obtuse angle of each of the parallelogram-shaped fins. 
     
     
         18 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the inlets are respectively arranged at opposite lateral sides relative to the diversion segment, and the outlets are respectively arranged at opposite lateral sides relative to the confluence segment. 
     
     
         19 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the fins on the heat exchange plate are formed by light etching molding. 
     
     
         20 . The integrated type micro-channel heat exchanger of  claim 11 , wherein, the multiple layers of heat exchange plates are bound into a whole piece by atomic diffusion.