Heat exchange plate for plate heat exchanger, and plate heat exchanger

Abstract

A heat exchange plate for use in a plate-type heat exchanger, and a plate-type heat exchanger having same. The heat exchange plate having a heat exchange portion and a port portion; fluids having different temperatures exchange heat with each other by means of the heat exchange portion; an opening used as the port of the heat exchanger is formed in the port portion. The heat exchange plate includes a first side and a second side in a direction perprendicular to the heat exchange plate; the port portion is provided with a contact porition that is in contact with the port portion of another heat exchange plate at the first side, and a protrusion protruding towards the second side relative to the contact portion. The heat exchange plate and the plate-type heat exchanger of the embodiments of the present invention can, for example, improve the quality of the port portion of the heat exchange plate of the heat exchanger.

What is claimed is: 
     
         1 . A heat exchange plate for a plate heat exchanger, the heat exchange plate comprising:
 a heat exchange portion and a port portion, wherein fluids having different temperatures exchange heat with each other through the heat exchange portion, and an opening used as a port of the heat exchanger is formed in the port portion,   wherein the heat exchange plate comprises a first side and a second side in a direction perpendicular to the heat exchange plate; and the port portion is provided with a contact portion that is in contact with the port portion of another heat exchange plate on the first side, and a protrusion protruding toward the second side relative to the contact portion.   
     
     
         2 . The heat exchange plate for a plate heat exchanger as claimed in  claim 1 , wherein 
 the port portion comprises a plurality of protrusions distributed in a circumferential direction around the opening.   
     
     
         3 . The heat exchange plate for a plate heat exchanger as claimed in  claim 2 , wherein 
 when viewed in the direction perpendicular to the heat exchange plate, the plurality of protrusions are each in a circular, rectangular or trapezoidal shape.   
     
     
         4 . The heat exchange plate for a plate heat exchanger as claimed in  claim 1 , wherein 
 the port portion comprises an annular contact portion and an annular protrusion surrounding the opening, and the annular contact portion and the annular protrusion adjoin each other.   
     
     
         5 . The heat exchange plate for a plate heat exchanger as claimed in  claim 4 , wherein 
 the port portion comprises at least two annular protrusions surrounding the opening, and two of the at least two annular protrusions adjoin each other and have different protrusion amounts relative to the contact portion; or two of the at least two annular protrusions are separated by the annular contact portion.   
     
     
         6 . The heat exchange plate for a plate heat exchanger as claimed in  claim 1 , wherein 
 the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; and a second annular portion surrounding the first annular portion and adjoining the first annular portion, wherein at least a part of one of the first annular portion and the second annular portion constitutes the protrusion.   
     
     
         7 . The heat exchange plate for a plate heat exchanger as claimed in  claim 6 , wherein
 a plurality of circumferentially-spaced parts of at least one of the first annular portion and the second annular portion constitute a plurality of protrusions; or   one of the first annular portion and the second annular portion constitutes an annular protrusion; or   one of the first annular portion and the second annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of the other of the first annular portion and the second annular portion constitute a plurality of protrusions.   
     
     
         8 . The heat exchange plate for a plate heat exchanger as claimed in  claim 1 , wherein 
 the port portion comprises: a first annular portion surrounding the opening, wherein an inner edge of the first annular portion constitutes an edge of the opening; a second annular portion surrounding the first annular portion and adjoining the first annular portion; and a third annular portion surrounding the second annular portion and adjoining the second annular portion, wherein at least a part of at least one of the first annular portion, the second annular portion and the third annular portion constitutes a protrusion.   
     
     
         9 . The heat exchange plate for a plate heat exchanger as claimed in  claim 8 , wherein 
 the second annular portion and the third annular portion protrude toward the second side relative to a part of a surface of the port portion to constitute protrusions, at least a part of the first annular portion constitutes a contact portion, and a protrusion amount of the second annular portion relative to the contact portion is less than a protrusion amount of the third annular portion.   
     
     
         10 . The heat exchange plate for a plate heat exchanger as claimed in  claim 8 , wherein 
 one of the first annular portion, the second annular portion and the third annular portion constitutes an annular protrusion, and a plurality of circumferentially-spaced parts of a further one of the first annular portion, the second annular portion and the third annular portion constitute a plurality of protrusions.   
     
     
         11 . The heat exchange plate for a plate heat exchanger as claimed in  claim 1 , wherein 
 the port portion comprises: a plurality of annular portions surrounding the opening, wherein an inner edge of the innermost annular portion constitutes an edge of the opening, two adjacent annular portions of the plurality of annular portions adjoin each other, and at least a part of at least one of the plurality of annular portions constitutes the protrusion.   
     
     
         12 . The heat exchange plate for a plate heat exchanger as claimed in  claim 11 , wherein 
 at least one of the plurality of annular portions protrudes toward the second side relative to a part of a surface of the port portion to constitute an annular protrusion; or   a plurality of circumferentially-spaced parts of at least one of the plurality of annular portions protrude toward the second side relative to the part of the surface of the port portion to constitute a plurality of protrusions.   
     
     
         13 . A plate heat exchanger, comprising:
 a plurality of heat exchange plates, each being the heat exchange plate as claimed in  claim 1 .   
     
     
         14 . The plate heat exchanger as claimed in  claim 13 , wherein 
 protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, and a gap between two protrusions is in the range of 0.2-0.3 mm.   
     
     
         15 . The plate heat exchanger as claimed in  claim 13 , wherein 
 protrusions of two adjacent heat exchange plates hermetically connected to each other at the port portions thereof protrude in directions away from each other, a gap between two protrusions is in the range of 0.2-0.3 mm, and the gap between the two protrusions is filled with a brazing alloy for brazing the plate heat exchanger, so as to braze the two protrusions together.