Plate heat exchanger

Abstract

A plate heat exchanger includes heat exchange plates and a port, and the port communicates with a predetermined heat exchange space of a plurality of heat exchange spaces. The heat exchange plates of the plate heat exchanger includes a plurality of first heat exchange plates and a plurality of second heat exchange plates. The first heat exchange plate includes: a first heat exchange plate main body; a first opening formed in the first heat exchange plate main body for forming the port; and a first annular protrusion surrounding the first opening, adjoining the first opening and protruding from the first heat exchange plate main body toward a first side in a stacking direction. The second heat exchange plate includes: a second heat exchange plate main body; a second opening formed in the second heat exchange plate main body for forming the port; and a second annular protrusion surrounding the second opening, adjoining the second opening and protruding from the second heat exchange plate main body toward a second side opposite the first side in the stacking direction. The plate heat exchanger according to the embodiments of the present invention can simplify the manufacturing process of the plate heat exchanger, for example.

1 . A plate heat exchanger, comprising:
 a plurality of heat exchange plates, the plurality of heat exchange plates being arranged in a stacking direction to form a plurality of heat exchange spaces, and the plurality of heat exchange plates comprising a plurality of first heat exchange plates and a plurality of second heat exchange plates; and   a port formed in the heat exchange plates, the port communicating with a predetermined heat exchange space of the plurality of heat exchange spaces, wherein   the first heat exchange plate comprises: a first heat exchange plate main body; a first opening formed in the first heat exchange plate main body for forming the port; and a first annular protrusion surrounding the first opening, adjoining the first opening and protruding from the first heat exchange plate main body toward a first side in the stacking direction; and   the second heat exchange plate comprises: a second heat exchange plate main body; a second opening formed in the second heat exchange plate main body for forming the port; and a second annular protrusion surrounding the second opening, adjoining the second opening and protruding from the second heat exchange plate main body toward a second side opposite to the first side in the stacking direction.   
     
     
         2 . The plate heat exchanger as claimed in  claim 1 , further comprising:
 a communicating hole formed in at least some of the first heat exchange plates and/or at least some of the second heat exchange plates, wherein the port communicates with the predetermined heat exchange space through the communicating hole.   
     
     
         3 . The plate heat exchanger as claimed in  claim 2 , wherein:
 the first annular protrusion of the first heat exchange plate comprises: an annular first portion extending from the first heat exchange plate main body toward the first side; and an annular second portion extending inwardly from the annular first portion, the second portion of the first annular protrusion having a surface facing the first side;   the second annular protrusion of the second heat exchange plate comprises: an annular first portion extending from the second heat exchange plate main body toward the second side; and an annular second portion extending inwardly from the annular first portion of the second annular protrusion of the second heat exchange plate, the second portion of the second annular protrusion having a surface facing the second side; and   the surface of the second portion of the first annular protrusion and the surface of the second portion of the second annular protrusion adjacent to each other are in at least partial contact to form a seal over at least one part of a circumferential length of the surface of the second portion of the first annular protrusion and the surface of the second portion of the second annular protrusion.   
     
     
         4 . The plate heat exchanger as claimed in  claim 3 , wherein:
 projections of the second portion of the first annular protrusion and the second portion of the second annular protrusion on a plane perpendicular to the stacking direction have an annular inner overlapping portion, and   a projection of the communicating hole on the plane perpendicular to the stacking direction is outside the annular inner overlapping portion.   
     
     
         5 . The plate heat exchanger as claimed in  claim 4 , wherein:
 at least one part of the projection of the second portion of the first annular protrusion on the plane perpendicular to the stacking direction is outside the projection of the second portion of the second annular protrusion in the plane perpendicular to the stacking direction.   
     
     
         6 . The plate heat exchanger as claimed in  claim 4 , wherein:
 the first heat exchange plate further comprises an annular portion surrounding the first annular protrusion, the annular portion of the first heat exchange plate has a surface facing the second side, the second heat exchange plate further comprises an annular portion surrounding the second annular protrusion, the annular portion of the second heat exchange plate has a surface facing the first side, and the surface of the annular portion of the first heat exchange plate and the surface of the annular portion of the second heat exchange plate adjacent to each other are in at least partial contact to form a seal.   
     
     
         7 . The plate heat exchanger as claimed in  claim 6 , wherein:
 projections of the annular portion of the first heat exchange plate and the annular portion of the second heat exchange plate on the plane perpendicular to the stacking direction have an annular outer overlapping portion, and   the projection of the communicating hole on the plane perpendicular to the stacking direction is inside the annular outer overlapping portion.   
     
     
         8 . The plate heat exchanger as claimed in  claim 6 , wherein:
 at least one part of the projection of the annular portion of the second heat exchange plate on the plane perpendicular to the stacking direction is inside the projection of the annular portion of the first heat exchange plate in the plane perpendicular to the stacking direction.   
     
     
         9 . The plate heat exchanger as claimed in  claim 6 , wherein:
 the communicating hole is in the annular second portions of the first annular protrusions of at least some of the first heat exchange plates and/or the communicating hole is in the annular portions of at least some of the second heat exchange plates.   
     
     
         10 . The plate heat exchanger as claimed in  claim 3 , wherein:
 the first annular protrusion of the first heat exchange plate has a circular annular shape, the second annular protrusion of the second heat exchange plate has a circular annular shape, and an outer diameter of the first annular protrusion of the first heat exchange plate is larger than an outer diameter of the second annular protrusion of the second heat exchange plate.   
     
     
         11 . The plate heat exchanger as claimed in  claim 6 , wherein:
 the annular portion of the first heat exchange plate has a circular annular shape, the annular portion of the second heat exchange plate has a circular annular shape, and an inner diameter of the annular portion of the second heat exchange plate is smaller than an inner diameter of the annular portion of the first heat exchange plate.   
     
     
         12 . The plate heat exchanger as claimed in  claim 11 , wherein:
 the annular portion of the first heat exchange plate adjoins the first portion of the first annular protrusion of the first heat exchange plate, and the annular portion of the second heat exchange plate adjoins the first portion of the second annular protrusion of the second heat exchange plate.   
     
     
         13 . The plate heat exchanger as claimed in  claim 4 , wherein:
 the first annular protrusion of the first heat exchange plate comprises an annular protrusion main body and a communicating protrusion extending outwardly from the annular protrusion main body; and   at least one part of a projection of the communicating protrusion of the first annular protrusion on the plane perpendicular to the stacking direction is outside the projection of the second portion of the second annular projection on the plane perpendicular to the stacking direction, and the projection of the communicating hole on the plane perpendicular to the stacking direction is in the at least one part of the projection of the communicating protrusion of the first annular protrusion.   
     
     
         14 . The plate heat exchanger as claimed in  claim 13 , wherein:
 the annular protrusion main body of the first annular protrusion of the first heat exchange plate has a circular annular shape, the second annular protrusion of the second heat exchange plate has a circular annular shape, and an outer diameter of the annular protrusion main body of the first annular protrusion of the first heat exchange plate is substantially equal to an outer diameter of the second annular protrusion of the second heat exchange plate; and   the projection of the communicating protrusion of the first annular protrusion on the plane perpendicular to the stacking direction is outside the projection of the second portion of the second annular protrusion on the plane perpendicular to the stacking direction, and the projection of the communicating hole on the plane perpendicular to the stacking direction is in the projection of the communicating protrusion of the first annular protrusion.   
     
     
         15 . The plate heat exchanger as claimed in  claim 13 , wherein:
 the communicating hole is a plurality of communicating holes, and the communicating protrusion is a plurality of spaced communicating protrusions.   
     
     
         16 . The plate heat exchanger as claimed in  claim 2 , wherein:
 a surface of the second annular protrusion of the second heat exchange plate facing the second side has a second recessed portion, and the second recessed portion forms the communicating hole.   
     
     
         17 . The plate heat exchanger as claimed in  claim 16 , wherein:
 the first annular protrusion of the first heat exchange plate has a circular annular shape, the second protrusion of the second heat exchange plate has a circular annular shape, and an outer diameter of the first annular protrusion of the first heat exchange plate is substantially equal to an outer diameter of the second annular protrusion of the second heat exchange plate.   
     
     
         18 . The plate heat exchanger as claimed in  claim 1 , wherein:
 an annular first portion of the first annular protrusion of the first heat exchange plate extends obliquely from the first heat exchange plate main body toward the first side, and an annular second portion of the first annular protrusion of the first heat exchange plate extends inwardly from the annular first portion of the first annular protrusion of the first heat exchange plate substantially parallel to the first heat exchange plate main body; and   an annular first portion of the second annular protrusion of the second heat exchange plate extends obliquely from the second heat exchange plate main body toward the second side, and an annular second portion of the second annular projection of the second heat exchange plate extends inwardly from the annular first portion of the second annular projection of the second heat exchange plate substantially parallel to the second heat exchange plate main body.   
     
     
         19 . The plate heat exchanger as claimed in  claim 18 , wherein:
 the annular second portion of the first annular protrusion of the first heat exchange plate adjoins the first opening, and the annular second portion of the second annular projection of the second heat exchange plate adjoins the second opening.   
     
     
         20 . The plate heat exchanger as claimed in  claim 1 , wherein:
 the plurality of first heat exchange plates and the plurality of second heat exchange plates are alternately arranged in the stacking direction.