Scroll compressor and scroll-type pressure transformer

Abstract

A scroll compressor comprises a stationary scroll 122 fixed to a casing 121, a stator 123 fixed to the casing 121, bearing supports 126 and 127 fixed to the casing 121, a rotary shaft 125 rotatably supported by the bearing supports 126 and 127 through bearings 128 and 129, a rotor 124 fixed to the rotary shaft 125, a hollow orbiting shaft 130 eccentrically and rotatably supported by the rotary shaft 125, a mounting member 133 fixed within the hollow orbiting shaft 130, an orbiting scroll 135 mounted to a mounting portion 134 of the mounting member 133, a hollow orbiting plate 136 fixed to the lower portion of the hollow orbiting shaft 130, an Oldham's ring 137 provided between the bearing support 127 and a hollow orbiting plate 136 and having protrusions 138 and 139, grooves 140 and 141 formed on the bearing support 127 and the hollow orbiting plate 136, the protrusions 138 and 139 being engaged with the grooves 140 and 141, and a suction pipe 142 and a discharge pipe 143 connected to the stationary scroll 122.

We claim:  
     
         1 . A scroll compressor comprises; 
 a casing;    a stationary scroll fixed to said casing;    a stator fixed to said casing;    a rotary shaft rotatably supported by said casing;    a rotor fixed to said rotary shaft;    an orbiting shaft eccentrically and rotatably supported by said rotary shaft;    an orbiting scroll fixed to said orbiting shaft, and    an anti-self-rotation device having a stationary portion fixed to said casing and a movable portion engaged with said orbiting shaft.    
     
     
         2 . A scroll compressor comprising: 
 a fixed body;    a stationary scroll fixed to said fixed body, said stationary scroll being a part of a compressor body;    a rotary shaft rotatably supported by said fixed body;    a driving device for rotatably driving said rotary shaft;    a hollow orbiting shaft eccentrically and rotatably supported by said rotary shaft;    an anti-self-rotation device for preventing the self-rotation of said hollow orbiting shaft; and    an orbiting scroll fixed to said hollow orbiting shaft, said orbiting scroll being a part of said compressor body,    wherein said compressor body is located inside said hollow orbiting shaft.    
     
     
         3 . A scroll compressor comprises: 
 a casing;    a stationary scroll fixed to said casing, said stationary scroll being a part of a compressor body;    a stator fixed to said casing;    a rotary shaft rotatably supported by said casing;    a rotor fixed to said rotary shaft;    an orbiting shaft eccentrically and rotatably supported by said rotary shaft;    an anti-self-rotation device for preventing the self-rotation of said orbiting shaft; and    an orbiting scroll fixed to said orbiting shaft, said orbiting scroll being a part of said compressor body,    wherein said compressor body is located inside said rotor.    
     
     
         4 . A scroll compressor as defined in  claim 3 , wherein said orbiting shaft is a hollow orbiting shaft, wherein said orbiting scroll is mounted on a mounting member fixed within said hollow orbiting shaft.  
     
     
         5 . A scroll compressor as defined in  claim 3 , wherein said rotor is fixed to said rotary shaft through a coupling member.  
     
     
         6 . A scroll-type pressure transformer comprising; 
 a casing;    a motor supported by said casing through a first bearing and provided with a rotary shaft having an eccentric hollow portion;    an orbiting shaft penetrating said hollow portion of said rotary shaft and rotatably supported by said rotary shaft through a second bearing;    an orbiting scroll member fastened to said orbiting shaft and having scrolls on both sides of said orbiting scroll member;    a pair of stationary scroll members fixed to said casing and opposed to each scroll of said orbiting scroll member;    an anti-self-rotation device provided in said orbiting shaft;    a gas inlet port communicating with a low-pressure area of a pair of scroll spaces formed between said orbiting scroll member and said stationary scroll members on both sides of said orbiting scroll member, and    a gas discharge port communicating with a high-pressure area of said scroll spaces.    
     
     
         7 . A scroll-type pressure transformer as defined in  claim 6 , wherein said anti-self-rotation device is provided between said orbiting plate fixed to said orbiting shaft and said casing.  
     
     
         8 . A scroll-type pressure transformer as defined in  claim 6  or  7 , wherein said orbiting scroll member is fastened to said orbiting shaft slidably in the axial direction of said orbiting shaft.