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.

Description

TECHNICAL FIELD

The present disclosure relates to a compressor, and more specifically, to a scroll compressor.

BACKGROUND

In a scroll compressor, it is normally necessary to adjust the structure of the scroll compressor in order to prevent a rotating part from generating a large inertia force, while the existing compressor structure is complex.

SUMMARY

Embodiments of the present disclosure are aimed to provide a scroll compressor.

According to one aspect of the present disclosure, a compressor is provided. The compressor includes:

• • 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.

According to one aspect of the present disclosure, the hybrid profile is defined by a combination of an involute and an arc.

According to one aspect of the present disclosure, 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°.

According to one aspect of the present disclosure, 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 head to tail in a direction extending outward from a center of the first outer profile; and 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.

According to one aspect of the present disclosure, 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.

According to one aspect of the present disclosure, 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 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.

According to one aspect of the present disclosure, a head end of the first inner involute is located at a 180° phase difference away from the 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 the 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 the 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 the tail end of the first outer centering arc.

According to one aspect of the present disclosure, the tail end of the first inner centering arc is located at an outside tip end of the first scroll wrap.

According to one aspect of the present disclosure, 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 positions of the head end of the first outer connection arc and of the tail end of the first outer centering arc.

According to one aspect of the present disclosure, 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°.

According to one aspect of the present disclosure, 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 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.

According to one aspect of the present disclosure, 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.

According to one aspect of the present disclosure, 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.

According to one aspect of the present disclosure, 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.

According to one aspect of the present disclosure, the tail end of the second inner centering arc is located at an outside tip end of the second scroll wrap.

According to one aspect of the present disclosure, 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 both the second outer connection arc and the second outer centering arc firstly increases and then decreases in 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 by changing a position of the tail end of the second outer centering arc.

According to one aspect of the present disclosure, 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.

According to one aspect of the present disclosure, a thickness of a wall of the first scroll wrap and a thickness of a wall of the second scroll wrap respectively become gradually smaller in a direction from a respective root portion towards a respective end portion.

According to one aspect of the present disclosure, the compressor further includes: first and second sealing elements; a first groove for mounting the first sealing element therein is formed in the end portion of the first scroll wrap, and a second groove for mounting the second sealing element therein is formed in the end portion of the second scroll wrap.

According to one aspect of the present disclosure, the first end plate is provided with a discharge outlet, at a position close to a geometric center of the first end plate, for discharging a fluid from the compression chamber, and is provided with a supply inlet for a fluid to enter the compression chamber. Wherein a 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.

According to another aspect of the present disclosure, a compressor includes: 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 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 defined by a hybrid profile.

According to another aspect of the present disclosure, the hybrid profile is defined by a combination of an involute and an arc.

According to another aspect of the present disclosure, the driving member comprises: a hub portion comprising a first end and an opposite second end and rotatably mounted on the bracket; and a flange radially extending outward from the first end; 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 the second end plate of the second scroll is rotatably supported on the flange.

According to another aspect of the present disclosure, 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.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the present disclosure will now be described by way of examples with reference to the accompanying drawings, in which:

FIG. 1 is a cross sectional view of a compressor according to an embodiment of the present disclosure.

FIG. 2 is an exploded perspective view of a first scroll, a first sealing element, a second scroll and a second sealing element shown in FIG. 1.

FIG. 3 is a cross sectional view of the first scroll and the second scroll combined together according to an embodiment of the present disclosure.

FIG. 4 is a cross sectional view of a first scroll and a second scroll combined together according to another embodiment of the present disclosure.

FIG. 5 is a side view of the first scroll and the second scroll shown in FIG. 2.

FIG. 6 is a cross sectional view taken along a line 6-6 shown in FIG. 5 from the bottom.

FIG. 7 is a bottom view of the first scroll shown in FIG. 2.

FIG. 8 is a top view of the second scroll shown in FIG. 2.

DETAILED DESCRIPTION

Technical solutions of the present disclosure will be further explained by embodiments with reference to the accompanying drawings. In the description, the same or similar reference numerals refer to the same or similar components. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the overall inventive idea of the present disclosure and should not be understood as a limitation to the present disclosure

Further, in the following detailed description, many specific details are elaborated to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments can also be implemented without these specific details. In other cases, well-known structures and devices are illustrated schematically to simplify the accompanying drawings.

In a scroll compressor, it is difficult for a geometric center of a scroll coincide or be close to a center of mass of the scroll, which causes instability of the scroll compressor during rotation, thereby limiting improvement in rotation speed of the scroll as well as improvement in efficiency of the compressor.

Referring to FIG. 1, the present disclosure provides a compressor 1000 including a first scroll 10, a second scroll 20, a bracket 50, a motor 40 and a driving member 60.

The first scroll 10 and the second scroll 20 match with each other to form a compression chamber configured to receive a fluid which is supplied into the compressor 1000. The first scroll 10 includes a first end plate 11 and a first scroll wrap 12 extending from the first end plate 11 toward the second scroll 20, and the second scroll 20 includes a second end plate 21 and a second scroll wrap 22 extending from the second end plate 21 toward the first scroll 10. The bracket 50 is located on a side of the second scroll 20 away from the first scroll 10, and the driving member 60 is rotatably supported onto the bracket 50 and located on a side of the second end plate 21 away from the first end plate 11. The driving member 60 includes a flange 61 and a hub portion 62 extending from the flange 61 in a direction facing away from the first scroll member 10 and the second scroll member 20. The hub portion 62 includes a first end and an opposite second end and is rotatably mounted onto the bracket 50. The flange 61 radially extends outward from the first end. The driving member 60 is formed with an inner hole extending through the hub portion 62 and the flange 61. A portion of the first scroll wrap 12 is supported on and connected to the flange 61, and the second end plate 21 is also rotatably supported on the flange 61. The motor 40 is optionally an axial-flux motor, which is beneficial to reduce the volume of the compressor 1000. The motor 40 includes a rotor 41 and a stator 42. The stator 42 is fixedly supported on the bracket 50, and the rotor 41 is rotatably supported on the stator 42 and is connected with the hub portion 62 by interference fit, so that the motor 40 can drive the first scroll 10 to rotate by driving the driving member 60 to rotate, and the first scroll 10 in turn drives the second scroll 20 to rotate so as to compress the fluid entering the compression chamber.

Co-rotating of the first scroll 10 and the second scroll 20 may make the first scroll 10 and the second scroll 20 to balance centrifugal forces generated by each other during rotation, thus avoiding a counterweight for balancing the centrifugal forces generated by the rotation of the first scroll 10 and the second scroll 20, simplifying the structure of the compressor 1000 and reducing the volume of the compressor 1000.

Referring to FIG. 2 to FIG. 4, a root portion of the first scroll wrap 12 is connected to the first end plate 11, an end portion of the first scroll wrap 12 abuts against the second end plate 21, a root portion of the second scroll wrap 22 is connected to the second end plate 21, and an end portion of the second scroll wrap 22 abuts against the first end plate 11. The compressor 1000 further includes a first sealing element 121 and a second sealing element 221. A first groove for mounting the first sealing element 121 is formed in the end portion of the first scroll wrap 12, and a second groove for accommodating the second sealing element 221 therein is formed in the end portion of the second scroll wrap 22.

In the embodiment shown in FIG. 3, a thickness of a wall of the first scroll wrap 12 is almost constant along a direction from a root portion of the first scroll wrap 12 to an end portion of the first scroll wrap 12, and likewise for a thickness of a wall of the second scroll wrap 22. In the embodiment shown in FIG. 4, a thickness of a wall of the first scroll wrap 12 becomes smaller along a direction from the root portion of the first scroll wrap towards the end portion of the first scroll wrap, and likewise for a thickness of a wall of the second scroll wrap 22.

FIG. 5 is a side view of the assembled first scroll and second scroll shown in FIG. 2. FIG. 6 is a cross sectional view taken along a line 6-6 shown in FIG. 5 and viewed from the bottom. Referring to FIG. 6, the first end plate 11 is provided, at a position close to a geometric center of the first end plate 11, with a discharge outlet 111 for discharging a fluid from the compression chamber and is provided with a supply inlet 112 for a fluid to enter the compression chamber. A center of the first scroll wrap 12 is close to the discharge outlet, and a tip end of the first scroll wrap 12 is close to the supply inlet 112. The fluid entering the compression chamber from the supply inlet 112 is compressed as the first scroll wrap 12 and the second scroll wrap 22 rotate relative to each other, and at the same time, the fluid moves towards the discharge outlet 111 in the compression chamber and exits from the discharge outlet 111 after the compression.

Shape of the first scroll wrap 12 and shape of the second scroll wrap 22 are described respectively in detail below with reference to FIGS. 7 and 8. The first scroll wrap 12 is configured with a shape of a first profile such that a center of mass of the first scroll 10 coincides or approximately coincides with a rotation center of the first scroll 10; and/or, the second scroll wrap 20 is configured with a shape of a second profile such that a center of mass of the second scroll 20 coincides or approximately coincides with a rotation center of the second scroll 20. As described in further detail below, each of the first profile and the second profile is defined by a hybrid profile which may be formed by a combination of an involute and an arc. If respective centers of mess of the scrolls 10 and 20 coincide or approximately coincide with respective rotation centers, it is helpful for the scrolls 10 and 20 for rotating stably, for improving a compression ration of the compressor 1000 as well as for reducing the volume of the scrolls 10 and 20 as well as the volume of the compressor 1000

Referring to FIG. 7, the structure of the first profile is illustrated below with specific points M1, M2, M3, M4, M1′, M2′, M3′, M4′ marked on the first profile. Mi-Mj indicates a curve segment between two points Mi and Mj.

The first profile includes: a first outer profile M1-M4 that defines a portion of a first outer side wall of the first scroll wrap 12 engaging with a second inner side wall of the second scroll wrap 12; and a first inner profile M1′-M4′ that defines a portion of a first inner side wall of the first scroll wrap 12 engaging with a second outer side wall of the second scroll wrap 22. A phase difference between the first outer profile M1-M4 and the first inner profile M1′-M4′ is 180°. The portion of the first outer side wall of the first scroll wrap 12 from the point M4 to the tip end of the first scroll wrap 12 does not engage with the second inner side wall of the second scroll wrap 22 during compression. The portion of the first inner side wall of the first scroll wrap 12 from the point M1′ to the center of the first scroll wrap 12 does not engage with the second outer side wall of the second scroll wrap 22 during compression.

The first outer profile M1-M4 includes a first outer involute M1-M2, a first outer connection arc M2-M3 and a first outer centering arc M3-M4 which are connected to each other head to tail in a direction extending outward from a center of the first outer profile. The first outer connection arc M2-M3 is connected between the first outer involute M1-M2 and the first outer centering arc M3-M4 and is tangent to the first outer involute M1-M2 and the first outer centering arc M3-M4 respectively, such that a center of a base circle of the first outer involute M1-M2 coincides with a circle center of the first outer centering arc M3-M4. Referring to FIG. 7, a head end M1 of the first outer involute M1-M2 is located at an inside of the first profile and close to a center of the first scroll wrap 12.

The first inner profile M1′-M4′ includes a first inner involute M1′-M2′, a first inner connection arc M2′-M3′ and a first inner centering arc M3′-M4′ which are connected to each other head to tail in a direction extending outward from a center of the first inner profile. The first inner connection arc M2′-M3′ is connected between the first inner involute M1′-M2′ and the first inner centering arc M3′-M4′ and is tangent to the first inner involute M1′-M2′ and the first inner centering arc M3′-M4′ respectively, such that a center of a base circle of the first inner involute M1′-M2′ coincides with a circle center of the first inner centering arc M3′-M4′.

A head end M1′ of the first inner involute M1′-M2′ is located at a 180° phase difference away from the head end M1 of the first outer involute M1-M2, and a tail end M2′ of the first inner involute M1′-M2′ is located at a 180° phase difference away from the tail end M2 of the first outer involute M1-M2. A head end M3′ of the first inner centering arc M3′-M4′ is located at a 180° phase difference away from the head end M3 of the first outer centering arc M3-M4, and a tail end M4′ of the first inner centering arc M3′-M4′ is located at a 180° phase difference away from the tail end M4 of the first outer centering arc M3-M4. Referring to FIG. 7, the tail end M4′ of the first inner centering arc M3′-M4′ is located at an outside tip end of the first scroll wrap 12.

A thickness of a wall of the first scroll wrap 12 corresponding to the first outer involute M1-M2 is uniform, and a thickness of a wall of the first scroll wrap 12 corresponding to both the first outer connection arc M2-M3 and the first outer centering arc M3-M4 first increases and then decreases in a direction from a head end M2 of the first outer connection arc M2-M3 to a tail end M4 of the first outer centering arc M3-M4, so as to change an area having a thicker wall of the first scroll wrap 12 by changing a position of the head end M2 of the first outer connection arc M2-M3 and by changing a position of the tail end M4 of the first outer centering arc M3-M4, thereby changing the center of mass of the first scroll 10 and the suction volume of the compression chamber.

Similarly, referring to FIG. 8, the structure of the second profile is illustrated below with specific points S1, S2, S3, S4, S1′, S2′, S3′, S4′ marked on the second profile. Si-Sj indicates a curve segment between two points Si and Sj.

The second profile includes: a second outer profile S1-S4 that defines a portion of a second outer side wall of the second scroll wrap 22 engaging with a first inner side wall of the first scroll wrap 12; and a second inner profile S1′-S4′ that defines a portion of a second inner side wall of the second scroll wrap 22 engaging with a second outer side wall of the first scroll wrap 12. A phase difference between the second outer profile S1-S4 and the second inner profile S1′-S4′ is 180°. The portion of the second outer side wall of the second scroll wrap 22 from the point S4 to the tip end of the second scroll wrap 22 does not engage with the first inner side wall of the first scroll wrap 12 during compression. The portion of the second inner side wall of the second scroll wrap 22 from the point S1′ to the center of the second scroll wrap 22 does not engage with the second outer side wall of the first scroll wrap 12 during compression.

Further, the second outer profile S1-S4 includes a second outer involute S1-S2, a second outer connection arc S2-S3 and a second outer centering arc S3-S4 which are connected to each other head to tail in a direction extending outward from a center of the second outer profile. The second outer connection arc S2-S3 is connected between the second outer involute S1-S2 and the second outer centering arc S3-S4 and is tangent to the second outer involute S1-S2 and the second outer centering arc S3-S4 respectively, such that a center of a base circle of the second outer involute S1-S2 coincides with a circle center of the second outer centering arc S3-S4.

Referring to FIG. 8, the head end S1 of the second outer involute S1-S2 is located at an inner side of the second profile and close to a center of the second scroll wrap 22.

The second inner profile S1′-S4′ includes a second inner involute S1′-S2′, a second inner connection arc S2′-S3′ and a second inner centering arc S4′-S4′ which are connected to each other head to tail in a direction extending outward from a center of the second inner profile. The second inner connection arc S2′-S3′ is connected between the second inner involute S1′-S2′ and the second inner centering arc S3′-S4′ and is tangent to the second inner involute S1′-S2′ and the second inner centering arc S3′-S4′ respectively, such that a center of a base circle of the second inner involute S1′-S2′ coincides with a circle center of the second inner centering arc S3′-S4′.

A head end S1′ of the second inner involute S′-S2′ is located at a 180° phase difference away from the head end S1 of the second outer involute S1-S2, and a tail end S2′ of the second inner involute S1′-S2′ is located at a 180° phase difference away from the tail end S2 of the second outer involute S1-S2. A head end S3′ of the second inner centering arc S3′-S4′ is located at a 180° phase difference away from the head end S3 of the second outer centering arc S3-S4, and a tail end S4′ of the second inner centering arc S3′-S4′ is located at a 180° phase difference away from the tail end S4 of the second outer centering arc S3-S4. Referring to FIG. 8, the tail end S4′ of the second inner involute S3′-S4′ is located at an outside tip end of the second scroll wrap 22.

A thickness of a wall of the second scroll wrap 22 corresponding to the second outer involute S1-S2 is uniform, and a thickness of a wall of the second scroll wrap 22 corresponding to both the second outer connection arc S2-S3 and the second outer centering arc S3-S4 first increases and then decreases in a direction from a head end S2 of the second outer connection arc S2-S3 to a tail end S4 of the second outer centering arc S3-S4, so as to change an area having a thicker wall of the second scroll wrap 22 by changing a position of the head end S2 of the second outer connection arc S2-S3 and by changing a position of the tail end S4 of the second outer centering arc S3-S4, thereby changing the center of mass of the second scroll 20 and the suction volume of the compression chamber.

It will be understood by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict of structure or principle.

After specifying the preferred embodiments of the present disclosure, it is clear to those skilled in the art that variations and modifications may be made without leaving the scope and spirit of protection of the claims, and that the present disclosure is not limited to these exemplary embodiments presented in the description.

Claims

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; anda 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; anda 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; andwherein 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; andwherein 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; anda 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; anda 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; andwherein 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; andwherein 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; anda 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, anda 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; anda 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.