Scroll compressor

Abstract

A scroll compressor includes a first scroll including a first end plate and a first scroll wrap extending downward from the first end plate; a second scroll including a second end plate and a second scroll wrap extending upward from the second end plate, the second scroll and the first scroll cooperating to form a compression chamber for compressing a refrigerant; a motor; a driving member located below the second scroll, the motor driving the first scroll to rotate through the driving member, and the first scroll driving the second scroll to rotate; and a bracket, the driving member being rotatably supported on the bracket. This structure can improve the performance of the scroll compressor.

What is claimed is: 
     
         1 . A scroll compressor, comprising:
 a first scroll comprising a first end plate and a first scroll wrap extending downward from the first end plate;   a second scroll comprising a second end plate and a second scroll wrap extending upward from the second end plate, the second scroll and the first scroll cooperating to form a compression chamber for compressing a medium;   a motor;   a driving member located below the second scroll, the motor driving the first scroll to rotate through the driving member, and the first scroll driving the second scroll to rotate; and   a bracket, the driving member being rotatably supported on the bracket.   
     
     
         2 . The scroll compressor of  claim 1 , wherein:
 the first end plate comprises: a port that penetrates a central part of the first end plate; and   a groove that surrounds the port,   the scroll compressor further comprises:   a sealing ring provided in the groove and extending out from the groove; and   an exhaust member, wherein a lower end of the exhaust member is located above the port of the first end plate of the first scroll, the exhaust member has an internal channel for discharging a compressed refrigerant from the port of the first end plate of the first scroll, and the sealing ring is located between the lower end of the exhaust member and the first end plate to form a seal between the lower end of the exhaust member and the first end plate.   
     
     
         3 . The scroll compressor of  claim 2 , wherein:
 the sealing ring has a C-shaped cross section, and an opening of the sealing ring faces a rotational axis of the first scroll.   
     
     
         4 . The scroll compressor of  claim 2 , wherein:
 the sealing ring has a recessed portion on an outer periphery; and   the scroll compressor further comprises: an anti-rotation pin fixed to the first end plate of the first scroll and having a stopper part protruding into the groove, the stopper part cooperating with the recessed portion of the sealing ring.   
     
     
         5 . The scroll compressor of  claim 2 , wherein:
 the driving member comprises: a hub portion having an inner hole, the hub portion comprising a first end portion and a second end portion opposite to each other; and a flange portion extending radially outward from the first end portion of the hub portion of the driving member, the second end plate of the second scroll being rotatably supported on the flange portion of the driving member.   
     
     
         6 . The scroll compressor of  claim 5 , further comprising:
 a scroll cover, the scroll cover comprising: an end plate having a center hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll, and the exhaust member passes through the center hole of the end plate of the scroll cover.   
     
     
         7 . The scroll compressor of  claim 6 , further comprising:
 a housing;   a partition wall provided in the housing, wherein the partition wall divides a space in the housing into a first space located below the partition wall and a second space located above the partition wall, the partition wall has an opening in a central part, and an upper end of the exhaust member is connected to an edge of the opening of the partition wall, which is used to discharge the compressed refrigerant from the port of the first end plate of the first scroll to the second space located above the partition wall; and   a heat shield provided between the partition wall and the first end plate of the first scroll.   
     
     
         8 . The scroll compressor of  claim 7 , wherein:
 the heat shield comprises one of two features:   an annular disc-shaped part and a center hole, and the exhaust member passes through the center hole of the heat shield; and,   
       an annular disc-shaped part and a cylindrical part extending downward from an inner periphery of the annular disc-shaped part, and a lower portion of the exhaust member is provided in the cylindrical part of the heat shield. 
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . The scroll compressor of  claim 7 , wherein:
 at least a part of the heat shield is provided between the partition wall and the scroll cover   the heat shield comprises an annular disc-shaped part and has a center hole, the exhaust member passes through the center hole of the heat shield, the disc-shaped part of the heat shield is spaced apart from the end plate of the scroll cover, and   an air suction channel is formed between an outer peripheral surface of the exhaust member and a hole wall of the center hole of the end plate of the scroll cover, and the refrigerant to be compressed enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped part of the heat shield and the end plate of the scroll cover, the air suction channel, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and gaps between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.   
     
     
         12 . The scroll compressor of  claim 7 , wherein:
 at least a part of the heat shield is provided between the partition wall and the scroll cover;   the heat shield comprises an annular disc-shaped part and a cylindrical part extending downward from an inner periphery of the annular disc-shaped part, a lower portion of the exhaust member is provided in the cylindrical part of the heat shield, the disc-shaped part of the heat shield is spaced apart from the end plate of the scroll cover, and   an air suction channel is formed between an outer peripheral surface of the cylindrical part of the heat shield and a hole wall of the center hole of the end plate of the scroll cover, and the refrigerant to be compressed enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped part of the heat shield and the end plate of the scroll cover, the air suction channel, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and gaps between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.   
     
     
         13 . The scroll compressor of  claim 5 , further comprising:
 a fixed shaft, a lower end of the fixed shaft being fixed to the bracket, and the hub portion of the driving member being rotatably mounted on the fixed shaft; and the scroll compressor further comprises: a thrust bearing provided between the second end portion of the hub portion of the driving member and the cylindrical portion of the bracket.   
     
     
         14 . The scroll compressor of  claim 13 , wherein:
 the bracket comprises: a cylindrical portion, the second end portion of the hub portion of the driving member being rotatably supported on the cylindrical portion of the bracket; and the scroll compressor further comprises: a thrust bearing provided between the second end portion of the hub portion of the driving member and the cylindrical portion of the bracket.   
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . The scroll compressor of  claim 1 , wherein:
 the driving member comprises: a hub portion having an inner hole, the hub portion comprising a first end portion and a second end portion opposite to each other; and a flange portion extending radially outward from the first end portion of the hub portion of the driving member, the second end plate of the second scroll being rotatably supported on the flange portion of the driving member, and   the flange portion has an upper surface, and the second end plate of the second scroll has a lower surface, and one of the upper surface of the flange portion and the lower surface of the second end plate of the second scroll has an annular thrust surface and an oil groove.   
     
     
         20 . (canceled) 
     
     
         21 . (canceled) 
     
     
         22 . (canceled) 
     
     
         23 . (canceled) 
     
     
         24 . (canceled) 
     
     
         25 . The scroll compressor of  claim 19 , wherein:
 the oil groove further comprises: a second oil groove provided, on the radially outer side of the annular thrust surface, on one of the upper surface of the flange portion and the lower surface of the second end plate of the second scroll, the second oil groove extending around the annular thrust surface.   
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . (canceled) 
     
     
         29 . (canceled) 
     
     
         30 . (canceled) 
     
     
         31 . The scroll compressor of  claim 25 , wherein:
 the upper surface of the flange portion has the annular thrust surface, and the second oil groove is provided on the upper surface of the flange portion; and   the driving member further comprises one of two features:   an eccentric ring hole in the upper surface of the flange portion, a part of the second oil groove corresponding to the eccentric ring hole being located on an inner side of the eccentric ring hole in a radial direction of the hub portion; and,   eccentric ring holes in the upper surface of the flange portion, the second oil groove comprises a plurality of second oil groove sections, each of the plurality of second oil groove sections is located between adjacent eccentric ring holes, and an end portion of each of the plurality of second oil groove sections is communicated with the eccentric ring holes.   
     
     
         32 . (canceled) 
     
     
         33 . (canceled) 
     
     
         34 . (canceled) 
     
     
         35 . (canceled) 
     
     
         36 . (canceled) 
     
     
         37 . The scroll compressor according to  claim 19 , further comprising:
 an annular wedge-shaped protrusion protruding from the annular thrust surface, wherein a cross section of the wedge-shaped protrusion in a radial direction has a wedge shape, the wedge-shaped protrusion has a wedge-shaped protrusion surface that is axially outward, and in the cross section in the radial direction, an axial distance between a first wedge-shaped protrusion point of the wedge-shaped protrusion surface in the radial direction and the annular thrust surface is the largest, and an axial distance between a second wedge-shaped protrusion point of the wedge-shaped protrusion surface in the radial direction and the annular thrust surface is zero.   
     
     
         38 . (canceled) 
     
     
         39 . (canceled) 
     
     
         40 . (canceled) 
     
     
         41 . The scroll compressor of  claim 1 , wherein:
 the driving member comprises: a hub portion having an inner hole, the hub portion comprising a first end portion and a second end portion opposite to each other; and a flange portion extending radially outward from the first end portion of the hub portion of the driving member, the second end plate of the second scroll being rotatably supported on the flange portion of the driving member; and   the scroll compressor further comprises a motor cover, the motor cover comprises a cylindrical portion and an annular partition wall provided in the cylindrical portion, an upper cylindrical part of the cylindrical portion located above the annular partition wall surrounds the flange portion of the driving member, and a lower cylindrical part of the cylindrical portion located below the annular partition wall surrounds the motor.   
     
     
         42 . The scroll compressor of  claim 41 , further comprising:
 a scroll cover, the scroll cover comprising: an end plate having a center hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll;   wherein the upper cylindrical part of the cylindrical portion of the motor cover also surrounds a part of the cylindrical portion of the scroll cover.   
     
     
         43 . The scroll compressor of  claim 41 , wherein:
 a stator of the motor is fixed to the partition wall of the motor cover.   
     
     
         44 . The scroll compressor of  claim 41 , wherein:
 the motor cover further comprises: an annular protrusion protruding upward from an inner edge of the annular partition wall.   
     
     
         45 . The scroll compressor of  claim 41 , further comprising:
 a housing; and   a compressor suction port provided in the housing;   wherein the bracket comprises: a cylindrical portion; a flange portion extending outward from the cylindrical portion; and a cylindrical wall surrounding the flange portion,   a lower end of the cylindrical portion of the motor cover is fixedly connected to an upper end of the cylindrical wall of the bracket to form a motor shell, a rotor and a stator of the motor are located in the motor shell, the lower end of the cylindrical portion of the motor cover has two opposite notches respectively forming an inlet and an outlet of the motor shell,   the motor cover further comprises an inverted U-shaped baffle extending from an outer surface of the cylindrical portion of the motor cover, and when viewed from a radial direction of the cylindrical portion of the motor cover, the notch forming the inlet of the motor shell is located on an inner side of the baffle, so that the refrigerant from a compressor suction port directly enters the inlet of the motor shell and flows out from the outlet of the motor shell.   
     
     
         46 . The scroll compressor of  claim 45 , wherein:
 an upper end of the cylindrical wall of the bracket has two opposite notches, and the two notches at the upper end of the cylindrical wall of the bracket and the two notches at the lower end of the cylindrical portion of the motor cover form the inlet and the outlet of the motor shell, respectively.   
     
     
         47 . The scroll compressor of  claim 46 , wherein:
 a position of the inlet corresponds to a position of the compressor suction port, and the outlet is located in a region spaced 160 degrees to 180 degrees from the inlet.   
     
     
         48 . The scroll compressor of  claim 46 , wherein:
 the cylindrical portion of the motor cover has a through channel extending from an upper surface of the partition wall to the lower end of the cylindrical portion of the motor cover, and the channel constitutes an oil return channel.   
     
     
         49 . The scroll compressor of  claim 48 , wherein:
 the cylindrical wall of the bracket has a through channel extending from an upper end of the cylindrical wall to a lower end of the cylindrical wall, and the channel of the cylindrical portion of the motor cover is communicated with the channel of the cylindrical wall of the bracket to jointly constitute the oil return channel.   
     
     
         50 . The scroll compressor of  claim 1 , wherein:
 an air suction channel is provided on a side of the first scroll away from the second scroll, and used for sucking the medium into the compression chamber.