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.