Scroll compressor

Abstract

A scroll compressor includes a first scroll, the first scroll including a first end plate and a first scroll wrap extending from the first end plate along a first direction; a second scroll, the second scroll including a second end plate and a second scroll wrap protruding from the second end plate along a second direction opposite to the first direction, the second scroll wrap and the first scroll wrap cooperating to form a compression cavity used for compressing a medium; a support located at a side of the second scroll away from the first scroll; a motor; and a driving member rotatably supported by the support and located at the side of the second scroll away from the first scroll. The motor drives the first scroll to rotate through the driving member, and the first scroll drives the second scroll to rotate. The scroll compressor is compact in structure, small in volume, and light in weight.

What is claimed is: 
     
         1 . A scroll compressor comprising:
 a first scroll comprising a first end plate and a first scroll wrap protruding from the first end plate along a first direction;   a second scroll comprising a second end plate and a second scroll wrap protruding from the second end plate along a second direction opposite to the first direction, the second scroll wrap and the first scroll wrap cooperating to form a compression cavity for compressing a medium;   a support located on a side of the second scroll away from the first scroll;   a motor; and   a driving member rotatably supported by the support and located on the side of the second scroll away from the first scroll, the motor driving, through the driving member, the first scroll to rotate, and the first scroll driving the second scroll to rotate.   
     
     
         2 . The scroll compressor of  claim 1 , further comprising:
 a connecting member connecting the first scroll to the driving member.   
     
     
         3 . The scroll compressor of  claim 2 , wherein
 the first scroll further comprises an outer wall protruding from the first end plate along the first direction, the outer wall is on a radially outer side of the first scroll wrap and a radially outer side of the second scroll, the outer wall is provided with the connecting member, and the driving member is connected to the first scroll through the connecting member.   
     
     
         4 . The scroll compressor of  claim 3 , wherein
 the outer wall has an annular shape.   
     
     
         5 . 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 and a second end opposite to each other; and a flange portion protruding radially outwards from the first end of the hub portion of the driving member, the driving member being connected to the first scroll through the flange portion.   
     
     
         6 . The scroll compressor of  claim 5 , further comprising:
 a fixed shaft fixed to the support,   the driving member being rotatably mounted to the support by mounting rotatably the hub portion of the driving member to the fixed shaft.   
     
     
         7 . The scroll compressor of  claim 5 , wherein
 the second end plate of the second scroll is rotatably supported by the flange portion of the driving member.   
     
     
         8 . The scroll compressor of  claim 1 , wherein
 all bearings of the scroll compressor are disposed on a side of the second end plate of the second scroll facing the first direction.   
     
     
         9 . The scroll compressor of  claim 6 , further comprising:
 a first bearing, the first end of the hub portion being mounted to the fixed shaft through the first bearing; and/or   a second bearing, the second end of the hub portion being mounted to the fixed shaft through the second bearing.   
     
     
         10 . The scroll compressor of  claim 9 , wherein
 the second scroll further comprises a hub portion protruding from the second end plate along the first direction,   the fixed shaft has an axial inner hole, and   the scroll compressor further comprises a third bearing, the hub portion of the second scroll being mounted in the axial inner hole of the fixed shaft through the third bearing.   
     
     
         11 . The scroll compressor of  claim 6 , wherein
 a hole wall of the inner hole of the hub portion of the driving member has a stepped portion, and the stepped portion of the hub portion of the driving member has a stepped surface facing the second direction,   the fixed shaft has a stepped portion, and the stepped portion of the fixed shaft has a stepped surface facing the first direction, and   the scroll compressor further comprises a first thrust bearing, the first thrust bearing being disposed between the stepped surface of the stepped portion of the hub portion of the driving member and the stepped surface of the stepped portion of the fixed shaft.   
     
     
         12 . The scroll compressor of  claim 6 , wherein
 the support comprises: a cylindrical portion, and a flange portion protruding radially from the cylindrical portion of the support, the second end of the hub portion of the driving member being supported by the flange portion of the support.   
     
     
         13 . The scroll compressor of  claim 12 , wherein
 a part of the fixed shaft is inserted into the cylindrical portion of the support and fixed to the cylindrical portion of the support, and the fixed shaft has a cylindrical shape.   
     
     
         14 . The scroll compressor of  claim 7 , wherein
 a surface of the second end plate of the second scroll has a first oil groove on an annular contact area between the second end plate of the second scroll and the flange portion of the driving member, the first oil groove extends transversely across a part of the annular contact area from a radially inner side of the annular contact area towards a radially outer side of the annular contact area, and the first oil groove is spaced in a radial direction from a radially outer edge of the annular contact area.   
     
     
         15 . The scroll compressor of  claim 14 , wherein
 the first oil groove extends along a radial direction.   
     
     
         16 . The scroll compressor of  claim 14 , wherein
 an annular recess is formed on the surface of the second end plate of the second scroll, the annular recess is on the radially inner side of the annular contact area, and the first oil groove extends transversely from a radially outer edge of the annular recess towards the radially outer side of the annular contact area and communicates with the annular recess.   
     
     
         17 . The scroll compressor of  claim 7 , further comprising:
 a second thrust bearing disposed between the second end plate of the second scroll and the flange portion of the driving member.   
     
     
         18 . The scroll compressor of  claim 12 , wherein
 either an end surface of the second end of the hub portion of the driving member or a surface of the flange portion of the support is configured with a second oil groove on an annular contact area between the second end of the hub portion of the driving member and the flange portion of the support, the second oil groove extends transversely across a part of the annular contact area from a radially inner side of the annular contact area towards a radially outer side of the annular contact area, and the second oil groove is spaced in a radial direction from a radially outer edge of the annular contact area.   
     
     
         19 . The scroll compressor of  claim 18 , wherein
 the second oil groove extends along a radial direction.   
     
     
         20 . The scroll compressor of  claim 18 , wherein
 the second oil groove is formed on the end surface of the second end of the hub portion of the driving member.   
     
     
         21 . The scroll compressor of  claim 20 , wherein
 the second oil groove is spaced apart from an outer periphery of the end surface of the second end of the hub portion of the driving member.   
     
     
         22 . The scroll compressor of  claim 12 , further comprising:
 a third thrust bearing disposed between the second end of the hub portion of the driving member and the flange portion of the support.   
     
     
         23 . The scroll compressor of  claim 1 , wherein
 the motor comprises a rotor and a stator fixed to the support, and the rotor of the motor drives, through the driving member, the first scroll to rotate.   
     
     
         24 . The scroll compressor of  claim 23 , wherein
 the rotor of the motor is disposed on a side of the stator facing the first direction or the second direction.   
     
     
         25 . The scroll compressor of  claim 4 , wherein
 the driving member comprises: a hub portion having an inner hole, the hub portion comprising a first end and a second end opposite to each other; and a flange portion protruding radially outwards from the first end of the hub portion, the flange portion of the driving member is tightly connected to the outer wall of the first scroll, to form a suction cavity of the scroll compressor, and fluid enters the compression cavity through the suction cavity.   
     
     
         26 . The scroll compressor of  claim 25 , wherein
 the driving member comprises at least one fluid passage formed in the flange portion of the driving member, the fluid passage has a fluid inlet which is formed in a surface of the flange portion of the driving member facing the first direction and a fluid outlet which is formed in a surface of the flange portion of the driving member facing the second direction, so that fluid enters the fluid passage through the fluid inlet of the fluid passage, and enters the suction cavity from the fluid outlet.   
     
     
         27 . The scroll compressor of  claim 26 , wherein
 the fluid passage extends along an axial direction of the driving member.   
     
     
         28 . The scroll compressor of  claim 26 , wherein
 the fluid passage extends obliquely relative to an axial direction of the driving member, and the fluid outlet of the fluid passage is farther than the fluid inlet away from a rotation axis of the driving member.   
     
     
         29 . The scroll compressor of  claim 28 , wherein
 the outer wall has a recess at a position corresponding to a position of the fluid outlet of the fluid passage, the recess is formed on a surface of the outer wall facing a rotation axis of the first scroll, and a wall surface of the recess facing the rotation axis of the first scroll is gradually inclined or curved towards the rotation axis of the first scroll in a direction towards the first end plate of the first scroll.   
     
     
         30 . The scroll compressor of  claim 26 , wherein
 the driving member comprises two fluid passages opposite to each other in a radial direction of the driving member.   
     
     
         31 . The scroll compressor of  claim 26 , wherein
 the fluid passage of the driving member has a circular, oval or curved cross section.   
     
     
         32 . The scroll compressor of  claim 3 , wherein
 the driving member comprises: a hub portion having an inner hole, the hub portion comprising a first end and a second end opposite to each other; and a flange portion protruding radially outwards from the first end of the hub portion of the driving member, the driving member being connected to the first scroll through the flange portion,   the outer wall of the first scroll has a scroll pin hole, and the flange portion of the driving member has a driving-member pin hole,   the outer wall of the first scroll has a scroll connection hole, the flange portion of the driving member has a driving-member connection hole, one of the driving-member connection hole of the flange portion of the driving member and the scroll connection hole of the outer wall of the first scroll has a threaded portion, and   the connecting member comprises:   a pin, inserted into the scroll pin hole of the outer wall of the first scroll and into the driving-member pin hole of the flange portion of the driving member, to determine a relative position of the first scroll and the driving member, and   a bolt, fixedly connecting the first scroll to the driving member through the scroll connection hole and the driving-member connection hole.   
     
     
         33 . The scroll compressor of  claim 7 , further comprising:
 an annular protrusion protruding from one of a surface of the second end plate of the second scroll and a surface of the flange portion of the driving member, wherein the annular protrusion has an annular wedge-shaped protrusion portion, a cross section of the wedge-shaped protrusion portion in a radial direction has a wedge shape, and the wedge-shaped protrusion portion has a wedge-shaped protrusion surface facing axially outwards;   in the cross section in the radial direction, the wedge-shaped protrusion surface has a largest axial distance from said one surface at a first wedge-shaped protrusion point in the radial direction, and an axial distance of zero from said one of surface at a second wedge-shaped protrusion point in the radial direction, and at least a portion of the wedge-shaped protrusion surface corresponding to the first wedge-shaped protrusion point is in an annular area of the surface of the flange portion of the driving member for supporting the surface of the second end plate of the second scroll.   
     
     
         34 . The scroll compressor of  claim 33 , wherein
 at least the portion of the wedge-shaped protrusion surface corresponding to the first wedge-shaped protrusion point is in an annular contact area between the second end plate of the second scroll and the flange portion of the driving member.   
     
     
         35 . The scroll compressor of  claim 33 , wherein
 at the first wedge-shaped protrusion point, the axial distance between the wedge-shaped protrusion surface and said one surface is in a range of 0.1 microns to 1 mm or in a range of 20 microns to 40 microns.   
     
     
         36 . (canceled) 
     
     
         37 . The scroll compressor of  claim 33 , wherein
 the first wedge-shaped protrusion point is on a radially outer side of the second wedge-shaped protrusion point, or   is on a radially inner side of the second wedge-shaped protrusion point.   
     
     
         38 . (canceled) 
     
     
         39 . The scroll compressor of  claim 33 , wherein
 the annular protrusion further has an annular transition protrusion portion, the transition protrusion portion has a transition protrusion surface facing axially outwards;   in the cross section in the radial direction, the transition protrusion surface extends from a point of the wedge-shaped protrusion surface corresponding to the first wedge-shaped protrusion point to said one surface in such a manner as to run away from the second wedge-shaped protrusion point and towards said one surface.   
     
     
         40 . The scroll compressor of  claim 39 , wherein
 a cross section of the transition protrusion portion in the radial direction has a wedge shape.   
     
     
         41 . The scroll compressor of  claim 39 , wherein
 a size of the transition protrusion portion in the radial direction is smaller than a size of the wedge-shaped protrusion portion in the radial direction.   
     
     
         42 . The scroll compressor of  claim 1 , further comprising:
 a shell;   wherein the first scroll, the second scroll, the support, the motor and the driving member are located in the shell, and an end of the support is fixed to a bottom of the shell.   
     
     
         43 . The scroll compressor of  claim 42 , wherein
 the shell comprises a first shell, a second shell and a third shell;   the first shell is connected to the second shell to form a sealed space; and the second shell is connected to the third shell to define a discharge cavity; and   the sealed space accommodates the first scroll, the second scroll, the support, the motor and the driving member, wherein the support is fixed to the first shell.   
     
     
         44 . The scroll compressor of  claim 42 , further comprising: an oil feeding screw arranged in the inner hole of the fixed shaft, and having one end located in a sump at the bottom of the shell and the other end connected to the hub portion of the second scroll. 
     
     
         45 . The scroll compressor of  claim 1 , wherein
 the driving member further comprises an eccentric ring hole formed in the flange portion, the second end plate of the second scroll has a coupling pin hole, an eccentric ring is disposed in the eccentric ring hole, and a coupling pin is inserted into the coupling pin hole and a hole of the eccentric ring.