Compressor

Abstract

A compressor is provided and includes a first scroll and a second scroll matching with each other to form a compression chamber. The first scroll includes a first end plate and a first scroll wrap extending from the first end plate toward the second scroll, the second scroll includes a second end plate and a second scroll wrap extending from the second end plate toward the first scroll; and a motor for driving the first and second scroll to co-rotate so as to compress a fluid entering the compression chamber; the first scroll wrap is configured with the shape of a first profile such that a center of mass of the first scroll coincides or approximately coincides with a rotation center of the first scroll; and/or, the second scroll wrap is configured with the shape of a second profile such that a center of mass of the second scroll coincides or approximately coincides with a rotation center of the second scroll, each of the first profile and the second profile being defined by a hybrid profile.

1 . A compressor, comprising:
 a first scroll and a second scroll, matching with each other to form a compression chamber;   the first scroll comprising a first end plate and a first scroll wrap extending from the first end plate toward the second scroll, the second scroll comprising a second end plate and a second scroll wrap extending from the second end plate toward the first scroll; and   a motor for driving the first scroll and the second scroll to rotate synchronously so as to compress a fluid entering the compression chamber;   wherein the first scroll wrap is configured in a shape of a first profile so that a center of mass of the first scroll coincides or approximately coincides with a rotation center of the first scroll; and/or, the second scroll wrap is configured in a shape of a second profile so that a center of mass of the second scroll coincides or approximately coincides with a rotation center of the second scroll, each of the first profile and the second profile being formed by a hybrid profile.   
     
     
         2 . The compressor according to  claim 1 , wherein the hybrid profile is defined by a combination of an involute and an arc. 
     
     
         3 . The compressor according to  claim 2 , wherein the first profile comprises:
 a first outer profile that defines a portion of a first outer side wall of the first scroll wrap engaging with a second inner side wall of the second scroll wrap; and   a first inner profile that defines a portion of a first inner side wall of the first scroll wrap engaging with a second outer side wall of the second scroll wrap, wherein a phase difference between the first outer profile and the first inner profile is 180°.   
     
     
         4 . The compressor according to  claim 3 , wherein
 the first outer profile comprises a first outer involute, a first outer connection arc and a first outer centering arc, which are connected to each other from head to tail in a direction extending outward from a center of the first outer profile; and   wherein the first outer connection arc is connected between the first outer involute and the first outer centering arc and is tangent to the first outer involute and the first outer centering arc respectively, such that a center of a base circle of the first outer involute coincides with a circle center of the first outer centering arc.   
     
     
         5 . The compressor according to  claim 4 , wherein
 a head end of the first outer involute is located at an inner side of the first profile and close to a center of the first scroll wrap.   
     
     
         6 . The compressor according to  claim 5 , wherein
 the first inner profile comprises a first inner involute, a first inner connection arc and a first inner centering arc, which are connected to each other head to tail in a direction extending outward from a center of the first inner profile; and   wherein the first inner connection arc is connected between the first inner involute and the first inner centering arc and is tangent to the first inner involute and the first inner centering arc, such that a center of a base circle of the first inner involute coincides with a circle center of the first inner centering arc.   
     
     
         7 . The compressor according to  claim 6 , wherein
 a head end of the first inner involute is located at a 180° phase difference away from a head end of the first outer involute, and a tail end of the first inner involute is located at a 180° phase difference away from a tail end of the first outer involute; and   a head end of the first inner centering arc is located at a 180° phase difference away from a head end of the first outer centering arc, and a tail end of the first inner centering arc is located at a 180° phase difference away from a tail end of the first outer centering arc.   
     
     
         8 . The compressor according to  claim 7 , wherein
 the tail end of the first inner centering arc is located at an outside tip end of the first scroll wrap.   
     
     
         9 . The compressor according to  claim 4 , wherein
 a thickness of a wall of the first scroll wrap corresponding to the first outer involute is uniform, and a thickness of a wall of the first scroll wrap corresponding to both the first outer connection arc and the first outer centering arc first increases and then decreases in a direction from a head end of the first outer connection arc to a tail end of the first outer centering arc, so as to change the center of mass of the first scroll by changing a position of the head end of the first outer connection arc and a position of the tail end of the first outer centering arc.   
     
     
         10 . The compressor according to  claim 1 , wherein the second profile comprises:
 a second outer profile that defines a portion of a second outer side wall of the second scroll wrap engaging with a first inner side wall of the first scroll wrap; and   a second inner profile that defines a portion of a second inner side wall of the second scroll wrap engaging with a first outer side wall of the first scroll wrap, wherein a phase difference between the second outer profile and the second inner profile is 180°.   
     
     
         11 . The compressor according to  claim 10 , wherein
 the second outer profile comprises a second outer involute, a second outer connection arc and a second outer centering arc, which are connected to each other head to tail in a direction extending outward from a center of the second outer profile; and   wherein the second outer connection arc is connected between the second outer involute and the second outer centering arc and is tangent to the second outer involute and the second outer centering arc, such that a center of a base circle of the second outer involute coincides with a circle center of the second outer centering arc.   
     
     
         12 . The compressor according to  claim 11 , wherein
 a head end of the second outer involute is located at an inner side of the second profile and close to a center of the second scroll wrap.   
     
     
         13 . The compressor according to  claim 12 , wherein
 the second inner profile comprises a second inner involute, a second inner connection arc and a second inner centering arc, which are connected to each other head to tail in a direction extending outward from a center of the second inner profile; and   wherein the second inner connection arc is connected between the second inner involute and the second inner centering arc and is tangent to the second inner involute and the second inner centering arc, such that a center of a base circle of the second inner involute coincides with a circle center of the second inner centering arc.   
     
     
         14 . The compressor according to  claim 13 , wherein
 a head end of the second inner involute is located at a 180° phase difference away from the head end of the second outer involute, and a tail end of the second inner involute is located at a 180° phase difference away from the tail end of the second outer involute; and   a head end of the second inner centering arc is located at a 180° phase difference away from the head end of the second outer centering arc, and a tail end of the second inner centering arc is located at a 180° phase difference away from the tail end of the second outer centering arc.   
     
     
         15 . The compressor according to  claim 14 , wherein
 the tail end of the second inner centering arc is located at an outside tip end of the second scroll wrap.   
     
     
         16 . The compressor according to  claim 11 , wherein
 a thickness of a wall of the second scroll wrap corresponding to the second outer involute is uniform, and a thickness of a wall of the second scroll wrap corresponding to the second outer connection arc and the second outer centering arc increases first and then decreases along a direction from a head end of the second outer connection arc to a tail end of the second outer centering arc, so as to change the center of mass of the second scroll by changing a position of the head end of the second outer connection arc and a position of the tail end of the second outer centering arc.   
     
     
         17 . The compressor according to  claim 1 , wherein
 a root portion of the first scroll wrap is connected to the first end plate, an end portion of the first scroll wrap abuts against the second end plate, and   a root portion of the second scroll wrap is connected to the second end plate, and an end portion of the second scroll wrap abuts against the first end plate.   
     
     
         18 . The compressor according to  claim 17 , wherein
 a thickness of the wall of the first scroll wrap and a thickness of the wall of the second scroll wrap respectively becomes smaller gradually along a direction from a respective root portion towards a respective end portion.   
     
     
         19 . The compressor according to  claim 18 , further comprising:
 a first sealing element and a second sealing element;   wherein a first groove for accommodating the first sealing element is formed in the end portion of the first scroll wrap, and a second groove for accommodating the second sealing element is formed in the end portion of the second scroll wrap.   
     
     
         20 . The compressor according to  claim 1 , wherein
 the first end plate is configured with a discharge outlet which is close to a geometric center of the first end plate and which is for discharging fluid from the compression chamber, and is configured with a supply inlet for fluid to enter the compression chamber;   wherein the center of the first scroll wrap is arranged close to the discharge outlet and an outer distal end of the first scroll wrap is arranged close to the supply inlet.   
     
     
         21 . A compressor, comprising:
 a first scroll and a second scroll, matching with each other to form a compression chamber,   the first scroll comprising a first end plate and a first scroll wrap extending from the first end plate toward the second scroll; the second scroll comprising a second end plate and a second scroll wrap extending from the second end plate toward the first scroll;   a bracket located on a side of the second scroll away from the first scroll;   a motor; and   a driving member, configured on a side of the second end plate away from the first end plate and rotatably supported on the bracket, wherein the motor is configured to drive, through the driving member, the first end plate to rotate so that the first end plate drives the second end plate to rotate to compress the fluid entering the compression chamber,   wherein the first scroll wrap is configured with a shape of a first profile such that a center of mass of the first scroll coincides with a rotation center of the first scroll; and/or, the second scroll wrap is configured with a shape of a second profile such that a center of mass of the second scroll coincides or approximately coincides with a rotation center of the second scroll, each of the first profile and the second profile being formed by a hybrid profile.   
     
     
         22 . The compressor according to  claim 21 , wherein the hybrid profile is defined by a combination of an involute and an arc. 
     
     
         23 . The compressor according to  claim 22 , wherein
 the driving member comprises: a hub portion comprising a first end and an opposite second end and rotatably mounted onto the bracket; and a flange radially extending outward from the first end;   wherein the driving member is formed with an inner hole extending through the hub portion and the flange and is connected with the first scroll through the flange, and wherein the second end plate of the second scroll is rotatably supported on the flange.   
     
     
         24 . The compressor according to  claim 23 , wherein the motor is an axial-flux motor and comprises: a stator fixed on the bracket, and a rotor mounted to the hub portion of the driving member in an interference fitting manner to drive the rotation of the first scroll by driving the driving member.