Plate-type heat exchanger

Abstract

The present invention relates to a plate-type heat exchanger. An object of the present invention is to provide a plate-type heat exchanger used as an internal heat exchanger in which a dead zone is intentionally formed by changing an arrangement of flow ports or additionally installing a barrier to adjust performance in order to prevent a problem in which an operating temperature of a compressor is raised and durability is degraded because of excessive performance of the internal heat exchanger.

What is claimed is: 
     
         1 . A plate-type heat exchanger comprising:
 a plurality of plates stacked to alternately define a first medium space through which a first medium flows, and a second medium space through which a second medium flows,   wherein the plates comprises two types of plates comprising:   a first plate having a first medium inlet and a first medium outlet configured to allow the first medium to flow in the first medium space; and   a second plate having a second medium inlet and a second medium outlet configured to allow the second medium to flow in the second medium space,   wherein the plate has a rectangular shape having a pair of short sides and a pair of long sides,   wherein through-ports comprising the first and second medium inlets and outlets formed on the plate to allow the media to flow are collectively called flow ports and   wherein a dead zone is formed by restricting the flow of the media in a partial zone on the plate.   
     
     
         2 . The plate-type heat exchanger of  claim 1 , wherein the dead zone is formed in the plate-type heat exchanger by arrangement positions of the flow ports, and
 wherein when a pair of flow ports selected from the flow ports are disposed spaced apart from each other in parallel with a long side extension direction or a short side extension direction of the plate and define a row of flow ports, the remaining flow ports, except for the row of flow ports, are disposed adjacent to the long side and the short side of the plate, the row of flow ports is disposed at a middle position of the plate, and the row of flow ports and the remaining flow ports are disposed to be biased to a partial region on the plate, such that the remaining partial region is formed as the dead zone.   
     
     
         3 . The plate-type heat exchanger of  claim 2 , wherein in the plate-type heat exchanger, the flow ports are disposed to be biased to one long side selected from the pair of long sides of the plate such that the remaining partial region at one long side is formed as the dead zone, or the flow ports are disposed to be biased to one short side selected from the pair of short sides of the plate such that the remaining partial region at one short side is formed as the dead zone. 
     
     
         4 . The plate-type heat exchanger of  claim 1 , wherein the dead zone is formed in the plate-type heat exchanger by a barrier provided in a medium flow path between the flow ports. 
     
     
         5 . The plate-type heat exchanger of  claim 4 , wherein when a pair of flow ports of the flow ports are formed to allow the medium to flow in the plate, one of the pair of flow ports is an inlet port through which the medium is introduced, and the other of the pair of flow ports is an outlet port through which the medium is discharged, the inlet port is disposed adjacent to any one of four vertices of the plate, the outlet port is disposed to be spaced apart from the inlet port in a diagonal direction, and the barrier extends in parallel with a short side extension direction of the plate and is disposed in parallel with the outlet port in the short side extension direction. 
     
     
         6 . The plate-type heat exchanger of  claim 5 , wherein the outlet port is disposed, in the short side extension direction of the plate, at a position adjacent to the long side different from the long side to which the inlet port is disposed adjacent, the outlet port is disposed, in a long side extension direction, at a middle position of the short side different from the short side to which the inlet port is disposed adjacent, the outlet port is disposed to be spaced apart from the inlet port in the diagonal direction, and a region between the barrier and the other short side is formed as the dead zone by the barrier when viewed in the long side extension direction. 
     
     
         7 . The plate-type heat exchanger of  claim 4 , wherein when a pair of flow ports of the flow ports are formed to allow the medium to flow in the plate, one of the pair of flow ports is an inlet port through which the medium is introduced, and the other of the pair of flow ports is an outlet port through which the medium is discharged, the inlet port is disposed adjacent to any one of four vertices of the plate, the outlet port is disposed to be spaced apart from the inlet port in a short side extension direction, and the barrier extends in parallel with the short side extension direction of the plate and disposed to be spaced apart from a row of flow ports, which comprises the inlet port and the outlet port, in a long side extension direction. 
     
     
         8 . The plate-type heat exchanger of  claim 7 , wherein the outlet port is disposed adjacent to another vertex connected, by moving short side, to the vertex of the plate to which the inlet port is disposed adjacent, the row of flow ports comprising the inlet port and the outlet port extends in parallel with one short side of the plate and is disposed adjacent to one short side of the plate, and a region between the barrier and the other short side is formed as the dead zone by the barrier when viewed in the long side extension direction. 
     
     
         9 . The plate-type heat exchanger of  claim 1 , wherein the first medium inlet and the first medium outlet on the first plate are disposed to be spaced apart from each other in parallel with a short side extension direction to constitute a first row of flow ports, the second medium inlet and the second medium outlet on the second plate are disposed to be spaced apart from each other in parallel with the short side extension direction to constitute a second row of flow ports, one of the first and second rows of flow ports is disposed adjacent to one short side selected from the pair of short sides, and the other of the first and second rows of flow ports is disposed at a middle position of the pair of short sides. 
     
     
         10 . The plate-type heat exchanger of  claim 9 , wherein the first row of flow ports is disposed adjacent to one short side selected from the pair of short sides, and the second row of flow ports is disposed at the middle position of the pair of short sides. 
     
     
         11 . The plate-type heat exchanger of  claim 10 , wherein a flow direction of the first medium flowing from the first medium inlet to the first medium outlet and a flow direction of the second medium flowing from the second medium inlet to the second medium outlet are opposite to each other. 
     
     
         12 . The plate-type heat exchanger of  claim 1 , wherein the plate-type heat exchanger is configured to allow a relatively high-pressure, high-temperature refrigerant discharged from a condenser and a relatively low-pressure, low-temperature refrigerant discharged from an evaporator to exchange heat with each other. 
     
     
         13 . The plate-type heat exchanger of  claim 12 , wherein the first medium is a relatively low-pressure, low-temperature refrigerant discharged from the evaporator, and the second medium is a relatively high-pressure, high-temperature refrigerant discharged from the condenser. 
     
     
         14 . The plate-type heat exchanger of  claim 12 , wherein the plate-type heat exchanger is integrated with the other heat exchanger and configured to receive a low-pressure, low-temperature refrigerant from the other heat exchanger. 
     
     
         15 . The plate-type heat exchanger of  claim 14 , wherein the other medium flow port is formed on the plate of the plate-type heat exchanger, and the other medium, except for the first and second media to exchange heat with each other in the plate-type heat exchanger, passes through the other medium flow port. 
     
     
         16 . The plate-type heat exchanger of  claim 15 , wherein the other medium flow port is disposed in a dead zone region in the plate-type heat exchanger.