Ejector

Abstract

A nozzle ( 41 ) is made of a sintered metal, and a pressure increasing portion (a mixing portion ( 42 ) and a diffuser ( 43 )) is manufactured by plastic-forming a metal pipe. Accordingly, the nozzle ( 41 ) can be manufactured in a short time while high accuracy in machining is maintained. Thus, the cost of manufacturing an ejector ( 40 ) can be reduced.

1 . An ejector being applied to a vapor-compression refrigerator which has a radiator for radiating a refrigerant having high temperature and pressure that is compressed by a compressor and an evaporator for evaporating a decompressed refrigerant having low temperature and pressure and transmits heat from a low temperature side to a high temperature side, 
 a nozzle for decompressing and expanding the refrigerant by converting a pressure energy of the refrigerant, which is emitted from the radiator, to a speed energy; and    pressure increasing portions for increasing the pressure of the refrigerant by converting a speed energy to a pressure energy while mixing the refrigerant injected from the nozzle and the refrigerant sucked from the evaporator, wherein    the pressure increasing portions are manufactured by deforming a pipe by plastic forming.    
   
   
       2 . An ejector according to  claim 1 , wherein the pressure increasing portions are manufactured by deforming a pipe by swaging.  
   
   
       3 . An ejector according to  claim 1 , wherein the pressure increasing portions are manufactured by deforming a pipe by press working.  
   
   
       4 . An ejector according to  claim 1 , wherein the pressure increasing portions are manufactured by deforming a pipe by spinning.