Screw Compressor, Air Conditioning Apparatus and Refrigeration Apparatus

Abstract

Disclosed are a screw compressor, and a gas conditioning apparatus and a refrigeration apparatus including the screw compressor. The screw compressor includes a body ( 10 ), in which a gas-supplement channel is provided, and the gas-supplement channel has at least two gas-supplement holes ( 201 ) communicated with a compression chamber. A number of the gas-supplement holes in the screw compressor is at least two. In a case that space available in the body ( 10 ) for disposing the gas-supplement holes ( 201 ) is limited, a hole diameter of each of the gas-supplement holes ( 201 ) is smaller. A larger number of gas-supplement holes ( 201 ) with smaller hole diameter are beneficial for reducing gas flow pulsation, thereby reducing noise in a gas-supplement process.

What is claimed is: 
     
         1 . A screw compressor, comprising:
 a body ( 10 ), comprising a housing, in which a compression chamber is provided, and   a gas-supplement channel, disposed in the body ( 10 ), the gas-supplement channel having at least two gas-supplement holes ( 201 ) communicated with the compression chamber.   
     
     
         2 . The screw compressor according to  claim 1 , wherein the gas-supplement holes ( 201 ) are disposed along an axial direction of the body ( 10 ). 
     
     
         3 . The screw compressor according to  claim 1 , wherein a shape of cross section of each gas-supplement hole ( 201 ) is any one of a circle, an ellipse, a round rectangle and a polygon. 
     
     
         4 . The screw compressor according to  claim 1 , wherein a radial dimension of each of the gas-supplement holes ( 201 ) is not greater than 6 mm, or the radial dimension of each of the gas-supplement holes ( 201 ) is not less than 2 mm. 
     
     
         5 . The screw compressor according to  claim 4 , wherein a shape of cross section of each gas-supplement hole ( 201 ) is a circle, and each of the gas-supplement holes ( 201 ) has a diameter of 5 mm. 
     
     
         6 . The screw compressor according to  claim 1 , further comprising a male screw ( 40 ) and a female screw disposed in the compression chamber; wherein at least a portion of the gas-supplement holes ( 201 ) are arranged in a shape corresponding to a partial outer contour of the male screw ( 40 ). 
     
     
         7 . The screw compressor according to  claim 6 , wherein at least three gas-supplement holes ( 201 ) are arranged to form a first group ( 31 ); and centers of the gas-supplement holes ( 201 ) in the first group ( 31 ) are arranged to form an arc which is concentric with the male screw ( 40 ). 
     
     
         8 . The screw compressor according to  claim 6 , wherein a contour of the gas-supplement channel is determined by a position of the male screw and an exhaust channel of the screw compressor; and a distance from a center of each gas-supplement hole ( 201 ) disposed in an outer layer to a contour of the gas-supplement channel is a fixed value. 
     
     
         9 . The screw compressor according to  claim 1 , wherein the body ( 10 ) further comprises:
 an exhaust end bearing seat, provided at an end of the housing; wherein at least a first part of a length section of the gas-supplement channel is disposed in the exhaust end bearing seat, and the gas-supplement holes ( 201 ) are provided in the exhaust end bearing seat.   
     
     
         10 . An air conditioning apparatus comprising the screw compressor of  claim 1 . 
     
     
         11 . A refrigeration apparatus comprising the screw compressor of  claim 1 .