Vapor injection device and compressor

Abstract

Provided are a vapor injection device and a compressor. The vapor injection device includes an injector valve plate, an injector plate, and an injector reed valve. One side of the injector plate facing toward the injector valve plate is provided with an avoidance groove. A guide post is disposed protruding from one side of the injector plate facing away from the injector valve plate. The guide post is inserted into a fixed scroll of the compressor and provided with an injection channel. A vapor injection inlet cavity is formed between the rear housing, the injector valve plate, and the fixed scroll. The injector reed valve is disposed between the injector valve plate and the injector plate and attaches to the injector valve plate, the injector reed valve is provided with a movable sheet, and the movable sheet, the injector valve plate and the avoidance groove form a one-way valve structure.

What is claimed is: 
     
         1 . A vapor injection device for vapor injection of a compressor, wherein a rear housing of the compressor is provided with a vapor injection port, and the vapor injection device comprises:
 an injector valve plate disposed in the rear housing, wherein the injector valve plate is provided with a via hole;   an injector plate disposed in the rear housing, wherein one side of the injector plate facing toward the injector valve plate is provided with an avoidance groove, a guide post is disposed protruding from one side of the injector plate facing away from the injector valve plate, the guide post is inserted into a fixed scroll of the compressor, an injection channel is disposed in the guide post, and a vapor injection inlet cavity is formed between the rear housing, the injector valve plate, and the fixed scroll; and   an injector reed valve disposed between the injector valve plate and the injector plate, wherein the injector reed valve is attached to the injector valve plate, wherein the injector reed valve is provided with a movable sheet, and the movable sheet, the injector valve plate and the avoidance groove form a one-way valve structure such that a vapor injection refrigerant entering from the vapor injection port sequentially passes through the vapor injection inlet cavity, the via hole and the one-way valve structure and enters the fixed scroll through the injection channel.   
     
     
         2 . The vapor injection device of  claim 1 , wherein a movable gap is disposed between the movable sheet and the injector reed valve, and the movable gap has a U-shaped structure. 
     
     
         3 . The vapor injection device of  claim 1 , further comprising a first sealing ring, wherein the first sealing ring is sleeved on the injector plate and disposed between the injector plate and an inner wall of the rear housing. 
     
     
         4 . The vapor injection device of  claim 3 , wherein the first sealing ring is configured to divide the inner wall of the rear housing into the vapor injection inlet cavity and an exhaust high-pressure cavity. 
     
     
         5 . The vapor injection device of  claim 1 , further comprising a second sealing ring, wherein the second sealing ring is sleeved on the guide post and disposed between the injector plate and the fixed scroll. 
     
     
         6 . The vapor injection device of  claim 1 , further comprising a positioning member, wherein the positioning member extends into the injector plate, the injector reed valve, and the injector valve plate. 
     
     
         7 . The vapor injection device of  claim 1 , further comprising a snap spring, wherein the snap spring is sleeved on the injector plate and disposed between the injector plate and the rear housing to limit an axial position of the injector plate. 
     
     
         8 . A compressor, comprising a body, an orbit scroll, a fixed scroll, a rear housing and a vapor injection device which are sequentially connected, wherein the rear housing is provided with a vapor injection port, and the vapor injection device comprises:
 an injector valve plate disposed in the rear housing, wherein the injector valve plate is provided with a via hole;   an injector plate disposed in the rear housing, wherein one side of the injector plate facing toward the injector valve plate is provided with an avoidance groove, a guide post is disposed protruding from one side of the injector plate facing away from the injector valve plate, the guide post is inserted into a fixed scroll of the compressor and provided with an injection channel, and a vapor injection inlet cavity is formed between the rear housing, the injector valve plate, and the fixed scroll; and   an injector reed valve disposed between the injector valve plate and the injector plate, wherein the injector reed valve is attached to the injector valve plate, wherein the injector reed valve is provided with a movable sheet, and the movable sheet, the injector valve plate and the avoidance groove form a one-way valve structure such that a vapor injection refrigerant entering from the vapor injection port sequentially passes through the vapor injection inlet cavity, the via hole and the one-way valve structure and enters the fixed scroll through the injection channel,   wherein a suction port is disposed on the body, the orbit scroll is disposed in the body and rotatable relative to the fixed scroll, and the vapor injection device is disposed between the fixed scroll and the rear housing and configured to supply air to the fixed scroll.   
     
     
         9 . The compressor of  claim 8 , wherein one side of the fixed scroll facing toward the orbit scroll is provided with a fixed scroll plate, one side of the orbit scroll facing toward the fixed scroll is provided with an orbit scroll plate, a compression cavity is formed between the fixed scroll plate and the orbit scroll plate, and the compression cavity is in communication with the suction port and the vapor injection device. 
     
     
         10 . The compressor of  claim 9 , wherein a bottom of the fixed scroll plate is provided with an injection hole, and the vapor injection device is in communication with the injection hole.