Shell-and-plate heat exchanger and refrigeration apparatus

Abstract

A shell and plate heat exchanger includes a shell having an internal space, and a plate stack housed in the internal space and having a plurality of heat transfer plates stacked and joined together. The heat exchanger causes heat exchange between a refrigerant that has flowed into the internal space, and a heating medium that has flowed into a heating medium channel of the plate stack. The shell includes a cylindrical body having openings on both axial ends, and first and second closing members configured to close the openings on both axial ends. At least one of the first and second closing member is formed into a curved shape protruding outward in an axial direction of the cylindrical body. Part of the plate stack is arranged in the at least one of the first and the second closing member formed into the curved shape.

1 . A shell-and-plate heat exchanger, comprising:
 a shell having an internal space; and   a plate stack housed in the internal space and including a plurality of heat transfer plates stacked and joined together,   the shell-and-plate heat exchanger being configured to cause heat exchange between
 a refrigerant that has flowed into the internal space of the shell and 
 a heating medium that has flowed into a heating medium channel of the plate stack, 
   the shell including
 a cylindrical body having openings on both axial ends, 
 a first closing member configured to close the opening on one end of the cylindrical body, and 
 a second closing member configured to close the opening on the other end of the cylindrical body, 
   at least one of the first closing member and the second closing member being formed into a curved shape protruding outward in an axial direction of the cylindrical body, and   part of the plate stack being arranged in the at least one of the first closing member and the second closing member formed into the curved shape.   
     
     
         2 . The shell-and-plate heat exchanger of  claim 1 , wherein
 the cylindrical body has an axial length shorter than a length of the plate stack in a stacking direction.   
     
     
         3 . The shell-and-plate heat exchanger of  claim 1 , wherein
 both of the first closing member and the second closing member are formed into a curved shape protruding outward in the axial direction of the cylindrical body.   
     
     
         4 . The shell-and-plate heat exchanger of  claim 1 , further comprising:
 a reinforcing member arranged between
 the plate stack and 
 the at least one of the first closing member and the second closing member formed into the curved shape, 
   the reinforcing member being configured to support the plate stack.   
     
     
         5 . The shell-and-plate heat exchanger of  claim 4 , wherein
 the reinforcing member is arranged to extend between
 an end portion of the plate stack in the stacking direction and 
 an inner wall surface of the at least one of the first closing member and the second closing member formed into the curved shape. 
   
     
     
         6 . The shell-and-plate heat exchanger of  claim 5 , wherein
 the reinforcing member includes a plurality of reinforcing members spaced apart from one another.   
     
     
         7 . The shell-and-plate heat exchanger of  claim 1 , wherein
 the first closing member and the second closing member are attached to the cylindrical body by welding.   
     
     
         8 . A refrigeration apparatus including the shell-and-plate heat exchanger of  claim 1 , the refrigeration apparatus further comprising:
 a refrigerant circuit through which refrigerant to exchange heat in the shell-and-plate heat exchanger flows.