Plate-type heat exchanger

Abstract

A plate-type heat exchanger capable of forming a flow path including a sealing structure without a separate structure is disclosed. The plate-type heat exchanger includes a core formed by stacking a plurality of plates and configured to allow a heat exchange medium to exchange heat, and a plurality of flow paths formed by through-holes continuously formed in the stacked plates so that a fluid flows in the core. The core is divided into a first heat exchange region at one side and a second heat exchange region at the other side based on any one plate among the stacked plates. The flow path includes at least one first flow path disposed at one end in a stacking direction of the plates and connected to the second heat exchange region. A portion of the first flow path at least passes through the first heat exchange region has a sealing structure.

What is claimed is: 
     
         1 . A plate-type heat exchanger comprising:
 a core formed by stacking a plurality of plates and configured to allow a heat exchange medium to exchange heat; and   a plurality of flow paths formed by through-holes continuously formed in the stacked plates so that a fluid flows in the core,   wherein the core is divided into a first heat exchange region at one side and a second heat exchange region at the other side based on any one plate among the stacked plates,   wherein the flow path comprises at least one first flow path disposed at one end in a stacking direction of the plates and connected to the second heat exchange region, and   wherein a portion of the first flow path at least passing through the first heat exchange region has a sealing structure.   
     
     
         2 . The plate-type heat exchanger of  claim 1 , wherein at least a part of the plate included in the first heat exchange region comprises a first depressed portion depressed in a ‘U’ shape toward the other side so that a part of a periphery of the through-hole constituting the first flow path is in surface contact with the adjacent plate. 
     
     
         3 . The plate-type heat exchanger of  claim 2 , wherein the plates constituting the first heat exchange region comprise:
 first plates comprising the first depressed portion; and   second plates comprising a second depressed portion depressed toward the other side so that a part of the periphery of the through-hole constituting the first flow path is in surface contact with the adjacent plate, and   wherein the first plates and the second plates are disposed alternately.   
     
     
         4 . The plate-type heat exchanger of  claim 3 , wherein the sealing structure is formed as the first depressed portion is continuously in surface contact with the second plate to seal the periphery of the through-hole. 
     
     
         5 . The plate-type heat exchanger of  claim 4 , wherein the first depressed portion is formed outward of the second depressed portion based on the through-hole. 
     
     
         6 . The plate-type heat exchanger of  claim 5 , wherein the second depressed portion is depressed within a range of a second diameter from an edge of the through-hole,
 wherein the first depressed portion is depressed within a range of a first diameter from a position spaced apart from the edge of the through-hole by the second diameter, and   wherein the first diameter is larger than the second diameter.   
     
     
         7 . The plate-type heat exchanger of  claim 3 , wherein the plates disposed at a portion at least constituting the first flow path among the plates constituting the second heat exchange region comprise:
 the second plates; and   third plates comprising the through-hole of the first flow path, and   wherein the second plates and the third plates are disposed alternately.   
     
     
         8 . The plate-type heat exchanger of  claim 7 , wherein a portion of the first flow path passing through the second heat exchange region has an open structure. 
     
     
         9 . The plate-type heat exchanger of  claim 1 , wherein the fluid flowing through the first heat exchange medium and the fluid flowing through the second heat exchange medium are identical or different. 
     
     
         10 . The plate-type heat exchanger of  claim 1 , wherein a connection flange is provided at one end of the core and connects an inlet pipe, through which a refrigerant is introduced into the core, and an outlet pipe through which the refrigerant is discharged to the outside from the core, and
 wherein the first flow path is connected to any one of the inlet pipe and the outlet pipe.   
     
     
         11 . The plate-type heat exchanger of  claim 1 , wherein the first flow path is configured to be biased toward any one side based on a center in a longitudinal direction of the plate. 
     
     
         12 . The plate-type heat exchanger of  claim 1 , wherein the core comprises a partition plate configured to physically separate the first heat exchange region and the second heat exchange region.