Refrigeration machine

Abstract

Provided is a refrigeration machine having: a refrigeration cycle having a compressor, a condenser, an expander, an evaporator, piping (12) which sequentially connects the compressor, the condenser, the expander, and the evaporator, and discharge piping; and an acoustic device (13) provided to the piping (12). The acoustic device (13) has a space formation section (14) having a space (S) formed therein and also having an open first end (14a) which is connected to the piping (12) so as to be in communication therewith; an extendible and contractible bellows pipe (21) connected to an open second end of the space formation section (14); and a sealing section (20) provided to the end of the bellows pipe (21), which is located on the opposite side thereof from the space formation section (14).

1 . A chiller comprising:
 a refrigeration cycle including a compressor, a condenser, an expander, an evaporator, a pipe that sequentially connects the compressor, the condenser, the expander, and the evaporator, and a discharge pipe; and   an acoustic device provided in the pipe,   wherein the acoustic device includes a space formation section in which a space is formed and which has an open first end connected to the pipe in a communicating state,   a bellows pipe that is connected to an open second end of the space formation section and is extendable and contractable, and   a sealing section that is provided in an end portion of the bellows pipe on a side opposite to the space formation section.   
     
     
         2 . The chiller according to  claim 1 ,
 wherein the space formation section includes a first tubular section having a cylindrical shape, a second tubular section having a cylindrical shape, and a second bellows pipe connecting the first tubular section to the second tubular section,   the first end is an end portion of the first tubular section on a side opposite to the second bellows pipe, and   the second end is an end portion of the second tubular section on a side opposite to the second bellows pipe.   
     
     
         3 . The chiller according to  claim 1 ,
 wherein the space formation section includes a tubular section that has one end portion connected to the pipe in a communicating state, and a container section that has an open first opening connected to the other end portion of the tubular section in a communicating state and has a volume larger than a volume of the space in the tubular section, and   the bellows pipe is connected to an open second opening of the container section.   
     
     
         4 . The chiller according to  claim 1 ,
 wherein the acoustic device includes a porous plate disposed at a boundary between the space formation section and a flow path of the pipe.   
     
     
         5 . The chiller according to  claim 2 ,
 wherein the acoustic device includes a porous plate disposed at a boundary between the space formation section and a flow path of the pipe.   
     
     
         6 . The chiller according to  claim 3 ,
 wherein the acoustic device includes a porous plate disposed at a boundary between the space formation section and a flow path of the pipe.