WO2024022503A1

WO2024022503A1 - Compressor and method for assembling compressor

Info

Publication number: WO2024022503A1
Application number: PCT/CN2023/109894
Authority: WO
Inventors: 孙玉松; 马海云; 叶航; 林江波; 黄成水; 张喜双; 刘三祥
Original assignee: 丹佛斯（天津）有限公司
Priority date: 2022-07-29
Filing date: 2023-07-28
Publication date: 2024-02-01
Also published as: CN117514774A

Abstract

A compressor, comprising: a housing (100); a first scroll member (10) and a second scroll member (20) located in the housing (100), the first scroll member (10) being provided with a first base plate (11) and a first scroll wrap (12) extending from the first base plate (11) toward the second scroll member (20), the second scroll member (20) being provided with a second base plate (21) and a second scroll wrap (22) extending from the second base plate (21) toward the first scroll member (10), and the second scroll wrap (22) and the first scroll wrap (12) being engaged with each other so as to define a compression cavity (110) therebetween; a motor (30), which comprises a stator (31) and a rotor (32), is located on the side of the second scroll member (20) distant from the first scroll member (10), and is used for driving, by means of the rotor (32), the first scroll member (10) to rotate to drive the second scroll member (20) to rotate; and a driving mechanism (70), comprising a receiving hub portion (71) and a flange (72) which extends radially from a first end (711) of the receiving hub portion (71) and supports the second base plate (21), wherein a second end (712) of the receiving hub portion (71) is fixed to the rotor (32) to position the rotor (32) in such a manner that the rotor (32) is spaced from the stator (31) by a certain gap. Thus, an axial flux motor can be used in existing scroll compressors.

Description

Compressor and method of assembling the same

Technical field

The present invention relates to a compressor and a method of assembling the compressor.

Background technique

In existing scroll compressors, the motor usually contains a stator and a rotor. When the scroll compressor is working, the rotor rotates at a high speed relative to the stator, so maintaining an ideal gap between the rotor and the stator is essential for safe operation of the compressor. And maintaining compressor performance is of great significance.

Contents of the invention

Embodiments of the present invention aim to solve at least one aspect of the above problems.

According to an aspect of the present invention, a compressor is provided, including: a casing; a first scroll member and a second scroll member located in the casing, the first scroll member having a first end plate and a second scroll member extending from the first end plate. A first scroll extending toward a second scroll member, the second scroll member having a second end plate and a second scroll extending from the second end plate toward the first scroll member, the second scroll member being connected to the first scroll member. The rolls mesh with each other to define a compression chamber therebetween; the motor includes a stator and a rotor and is located on a side of the second scroll member away from the first scroll member for driving the first scroll member to rotate through the rotor. The second scroll is driven to rotate; the driving mechanism includes a receiving hub and a flange extending radially from the first end of the receiving hub and supporting the second end plate; wherein the second end of the receiving hub is fixed to The rotor is positioned to be spaced apart from the stator by a certain gap.

According to one aspect of the present invention, the compressor further includes: a retainer for fixing the rotor thereon; wherein the second end of the receiving hub is fixed to the retainer radially inside the rotor to position the rotor with The stators are spaced apart.

According to an aspect of the present invention, the retainer has a fixing portion connecting the hub portion and the cylindrical shape, so that the rotor is fixed to the fixing portion on the outside of the connecting hub portion, and the hub portion is accommodated. The second end is threadedly connected to the connecting hub inside the connecting hub.

According to one aspect of the present invention, the compressor further includes: a rolling bearing installed inside the connecting hub of the retainer and accommodating the second end of the hub against its upper side.

According to one aspect of the invention, the compressor further includes: a bracket fixed to the housing and against the underside of the rolling bearing for supporting the retainer; and a shaft fixed to the bracket and extending from the bracket into the receiving hub, The shaft is provided with a shoulder that bears on the upper side of the rolling bearing to further position the rotor spaced apart from the stator.

According to an aspect of the present invention, the bracket is provided with: a fixed hub part into which the bottom end of the shaft extends and is threadedly connected; a cylindrical receiving part for accommodating the motor and the holder; and a step part, It is connected between the receiving part and the fixed hub part for accommodating the rolling bearing, so that the lower side of the rolling bearing abuts against the top end of the fixed hub part.

According to one aspect of the present invention, wherein the top end of the shaft is located in the receiving hub and is provided with a receiving hole, the second end plate is provided with a mounting hub extending in a direction away from the first scroll, and the mounting hub is received in Accommodation hole.

According to one aspect of the invention, the compressor further includes a pump having a top end operably connected to the mounting hub of the second end plate in the receiving hole and a bottom end extending into the oil sump located at the bottom of the housing, Wherein, the shaft is provided with a feed channel extending from its bottom end to its top end, and the pump is rotatably disposed in the feed channel to feed oil along a gap between the pump and the feed channel.

According to one aspect of the invention, the compressor further includes a first cover fixed to the bracket to cover the motor, between the stator and the flange and through which the receiving hub extends, wherein the stator is fixed to the first cover.

According to one aspect of the present invention, the compressor further includes a second cover, a top of the second cover covers and is fixed to the first end plate, and a side wall of the second cover is fixed to the flange.

According to an aspect of the invention, the rotor is located on a side of the stator facing away from the first cover.

According to an aspect of the present invention, the central axis of the receiving hole of the shaft is collinear with the rotation axis of the second scroll member, the central axis of the top end of the shaft is collinear with the rotation axis of the first scroll member, and the center of the receiving hole is collinear. The axis is offset from the central axis of the top end of the shaft such that the axis of rotation of the second scroll is offset from the axis of rotation of the first scroll.

According to an aspect of the invention, wherein the gap is in the range of 0.1 mm to 3 mm.

According to another aspect of the present invention, a method of assembling a compressor is provided. The compressor includes: a casing, a bracket with a fixed hub, a motor with a stator and a rotor, a retainer with a connecting hub, a rolling bearing, and a A driving mechanism for accommodating the hub, wherein the method includes: fixing the bracket in the housing; installing the rolling bearing on the inside of the connecting hub of the retainer; rotatably mounting the retainer with the rotor mounted on the bracket and fixing the stator to the bracket, wherein the stator and the rotor are attracted to each other due to magnetic attraction; and mounting the drive mechanism to the retainer by threading the receiving hub of the drive mechanism to the connecting hub of the retainer, so that the accommodating hub is One end of the hub pushes against the upper side of the rolling bearing in a direction away from the stator, driving the retainer and the rotor together to move in a direction away from the stator, thereby positioning the rotor to be spaced apart from the stator.

According to another aspect of the invention, the compressor further includes a shaft having a shoulder, and the method further includes: mounting the shaft to the bracket, wherein the shaft is secured to the bracket by fixing a bottom end of the shaft into a fixed hub of the bracket. The shoulder is pushed against the upper side of the rolling bearing in the direction away from the stator until the lower side of the rolling bearing abuts against the top end of the fixed hub of the bracket, thereby further maintaining the gap between the rotor and the stator.

According to another aspect of the present invention, the compressor further includes: a first cover, wherein the step of fixing the stator to the bracket includes fixing the stator to the first cover, and then fixing the first cover to the bracket.

Description of drawings

The accompanying drawings, which are incorporated in and form a part of this specification, illustrate the disclosure and, together with the description, further serve to explain the principles of the disclosure and enable any person skilled in the relevant art to make and use the embodiments described herein.

Figure 1 is a perspective view of a compressor according to an embodiment of the present invention;

Figure 2 is a cross-sectional view of the compressor shown in Figure 1;

Figure 3 is a cross-sectional view showing the second scroll, the driving mechanism, the motor cover, the motor, the bracket, the shaft, the rolling bearing, the retainer, and the pump in Figure 2 when they are assembled together;

Figure 4 is a cross-sectional view showing the drive mechanism, motor cover, motor, rolling bearing, retainer, and bracket in Figure 2 when they are assembled together;

Figure 5 is a cross-sectional view showing an individual shaft in Figure 2;

Figure 6 is a cross-sectional view showing the motor cover, stator, and bracket in Figure 2 when they are assembled together; and

FIG. 7 is a cross-sectional view showing the drive mechanism, rolling bearing, and retainer in FIG. 2 assembled together.

The features of the present disclosure will become more apparent in the following detailed description taken in conjunction with the accompanying drawings, wherein like reference numerals identify corresponding elements throughout. In the drawings, similar reference numbers generally identify identical, functionally similar, and/or structurally similar elements. Unless otherwise indicated, the drawings provided throughout this disclosure should not be construed as being drawn to scale.

Detailed ways

The technical solution of the present invention will be further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numbers indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be understood as a limitation of the present invention.

Additionally, in the following detailed description, for convenience of explanation, numerous specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are illustrated in order to simplify the drawings.

In scroll compressors, radial flux motors are used, and fixtures are used to ensure the gap between the rotor and stator of the radial flux motor. However, this often results in a large scroll compression volume, especially for refrigeration/ For compressors with high heat demand, as the cooling and heating capacity of the compressor continues to increase, the motor occupies a relatively large area inside the compressor, making it impossible to achieve the goals of compact structure and light volume. For existing variable frequency compressors, although the cooling capacity can be increased through frequency conversion technology, existing variable frequency motors still widely use radial flux motors, and the shortcomings of the existing compressor structure still exist.

The axial flux motor can well overcome the lack of internal space of the compressor and can achieve the goal of compact structure. However, when using an axial flux motor to design a compressor, the magnetic force between the stator and the rotor is large, making it difficult to Maintaining an ideal gap between the rotor and stator makes axial flux motors inconvenient to use in existing scroll compressors.

Figure 1 shows a perspective view of a compressor 1000 according to an embodiment of the present invention. The compressor 1000 includes: a casing 100, a first scroll 10, a second scroll 20 located in the casing 100, a motor 30, a retainer 33, a rolling bearing 34, a pump 40, a motor cover 50, a bracket 60, a drive Mechanism 70, Scroll Cover 80 and Shaft 90.

FIG. 2 shows a cross-sectional view of the compressor 1000 in FIG. 1 showing the internal structure of the compressor 1000. The overall structure and function of the compressor 1000 will be described in detail below with further reference to FIG. 2 .

The first scroll 10 has a first end plate 11 and a first scroll 12 extending from the first end plate 11 toward the second scroll 20 , and the second scroll 20 has a second end plate 21 and a first scroll 12 extending from the first end plate 11 toward the second scroll 20 . The end plate 21 extends toward the second scroll 22 of the first scroll 10 , and the second scroll 22 meshes with the first scroll 12 to define a compression chamber 110 therebetween to compress the inlet from the housing 100 101 The refrigerant gas entering the compressor 1000.

Referring to FIG. 2 , in the embodiment of the present application, the motor 30 is configured as an axial flux motor and is located on a side of the second scroll member 20 away from the first scroll member 10 . The motor 30 includes a stator 31 and a rotor 32 , wherein the rotor 32 is located on a side of the stator 31 away from the second scroll member 20 and is spaced apart from the stator 31 . The gap between the rotor 32 and the stator 31 needs to be maintained, for example, between 0.1 mm and 3 mm or between 0.5 mm and 1.5 mm to ensure that the motor 30 can operate normally. The stator 31 is bolted to be fixed to the motor cover 50 . The motor cover 50 is bolted to the bracket 60 to cover the motor 30 , and together with the bracket 60 forms a space for accommodating the motor 30 . The rotor 32 is located on a side of the stator 31 away from the motor cover 50 . The rotor 32 is fixed on a retainer 33 (the structure of the retainer 33 will be described in detail below with reference to Figures 3, 4 and 7). The retainer 33 is rotatably supported on the bracket 60. The bracket 60 is fixed by interference fit. into the housing 100 . The retainer 33 is threadedly connected to the second end 712 of the cylindrical receiving hub 71 of the drive mechanism 70 and extends into the bracket 60 . The second end 712 of the receiving hub 71 is fixed to the retainer 33 radially inside the rotor 32 to position the rotor 32 spaced apart from the stator 31, The ideal gap between the rotor 32 and the stator 31 is thus maintained.

In another embodiment of the invention, the rotor 32 may be integrally formed with the retainer 33 as a component serving as the rotor, so that the second end 712 of the receiving hub 71 is directly fixed to said component serving as the rotor. This can simplify the structure of the compressor 1000.

A flange 72 extending radially from the first end 711 of the receiving hub 71 serves to support the second end plate 21 . The scroll cover 80 , whose top 81 covers and is fixed to the first end plate 11 , is fixed to the flange 72 radially outside the second end plate 21 by its side wall 82 . The motor cover 50 is located between the stator 31 and the flange 72 and has the receiving hub 71 extending therethrough.

With this structure, the rotor 32 drives the first scroll 10 to rotate through the retainer 33, the receiving hub 71, the flange 72, and the scroll cover 80 to drive the second scroll 20 to rotate, so that the first scroll 10 and the second scroll member 20 rotate together to compress the refrigerant gas.

Continuing to refer to FIG. 2 , the shaft 90 is fixed to the fixed hub 67 of the bracket 60 located in the oil pool 120 at the bottom of the housing 100 and extends from the fixed hub 67 of the bracket 60 to the receiving hub 71 such that the shaft 90 is located in the oil pool 120 at the bottom of the housing 100 . The end surface of the top end 91 in the receiving hub 71 is substantially flush with the upper surface of the flange 72 supporting the second end plate 21 , and the bottom end 92 in the fixed hub 67 of the shaft 90 that is fixed to the bracket 60 is located in the oil pool 120 . The shaft 90 is provided with a feed channel 93 extending from the bottom end 92 to the top end 91 . The top end 91 of the shaft 90 is provided with a receiving hole 95 communicating with the feed channel 93 . The second end plate 21 faces away from the first scroll member 10 The mounting hub 23 extending in the direction is received in the receiving hole 95 , and the cylindrical thread pump 40 is rotatably disposed in the feed channel 93 and extends along the feed channel 93 into the receiving hole 95 , so that the top end of the pump 40 41 can be operably connected to the mounting hub 23 of the second scroll 20 in the receiving hole 95 . The bottom end 42 of the pump 40 extends into the oil sump 120 at the bottom of the housing 100 .

The central axis of the receiving hole 95 is collinear with the rotation axis of the second scroll 20 , the central axis of the top end 91 of the shaft 90 is collinear with the rotation axis of the first scroll 10 , and the receiving hole 95 of the top end 91 of the shaft 90 is collinear. The central axis deviates from the central axis of the tip 91 , so that the rotation axis of the second scroll 20 deviates from the rotation axis of the first scroll 10 . In addition, the centers of gravity of the first scroll 10 and the second scroll 20 are located on their respective rotation axes. This is conducive to the first scroll member 10 and the second scroll member 20 balancing the centrifugal force generated by each other during the rotation process, thereby avoiding the need to provide a balance weight to balance the rotation of the scroll members 10 and 20 The centrifugal force generated by the motion simplifies the structure of the compressor 1000 and reduces the volume of the compressor 1000 .

In addition, since the first scroll member 10 and the second scroll member 20 rotate together, the efficiency is twice as high as that of a traditional scroll compressor (one scroll member rotates and the other scroll member is stationary). Therefore, the same refrigeration capacity can be achieved. Basically, the diameters of the first scroll member 10 and the second scroll member 20 are made as small as possible, thereby making the structure of the compressor 1000 compact.

Through this structure, the rotor 32 can drive the driving mechanism 70 to rotate. The driving mechanism 70 in turn drives the second cover 80 and the first scroll member 10 to rotate. The first scroll member 10 in turn drives the second scroll member 20 and its mounting hub. The part 23 rotates, so that the pump 40 rotates relative to the fixed shaft 90, so that the oil used as a lubricant can be fed upward from the oil pool 120 to the compressor 1000 along the gap between the pump 40 and the feed channel 93. Components (thrust bearings, radial bearings, scrolls 10, 20, seals, etc.).

Referring to Figures 3, 4 and 7, the retainer 33 has a connecting hub part 331 and a cylindrical fixing part 332, so that the rotor 32 is fixed to the fixing part 332 on the outside of the connecting hub part 331, and the second receiving hub part 71 End 712 is threaded to the connecting hub 331 inside the connecting hub 331 . The rolling bearing 34 (for example, a thrust angular contact ball bearing) is mounted inside the connecting hub 331 and the second end 712 of the receiving hub 71 abuts its upper side 341 . The lower end 3311 of the connecting hub 331 is provided with a radial protrusion 33111, and the lower side 342 of the rolling bearing 34 abuts against the radial protrusion 33111, which facilitates the installation of the rolling bearing 34 inside the connecting hub 331. In this way, when assembling the compressor 1000, the user can push the second end 712 of the receiving hub 71 against the rolling bearing 34 by twisting the driving mechanism 70 to push the retainer 33 and the rotor 32 to move in a direction away from the stator 31, thereby The rotor 32 is positioned to be spaced apart from the stator 31 against the magnetic attraction between the stator 31 and the rotor 32 and maintains the required gap between the rotor 32 and the stator 31 .

Referring to Figures 2, 3, 4 and 6, the bracket 60 abuts the underside 342 of the rolling bearing 34 for supporting the motor 30, and more specifically the retainer 33. The bracket 60 supports the holder 33 through the rolling bearing 34, but the bracket 60 does not contact the holder 33, otherwise the holder 33 is difficult to rotate relative to the fixed bracket 60. In other words, the holder 33 is spaced apart from the bracket 60. The rolling bearing 34 can reduce the friction between the bracket 60 and the retainer 33 during relative rotation, so as to promote the rotation of the rotor 32 and the retainer 33 relative to the bracket 60 . More specifically, the bracket 60 is also provided with a cylindrical receiving portion 68 and a step portion 69 . The accommodating portion 68 is used to accommodate the motor 30 and the holder 33 . The step portion 69 is connected between the receiving portion 68 and the fixed hub portion 67 for accommodating the rolling bearing 34 so that the lower side 342 of the rolling bearing 34 abuts against the top end 681 of the fixed hub portion 67 so that the retainer 33 is connected to the receiving portion. The portions 68 are spaced apart to facilitate the rotation of the rotor 32 and the retainer 33 relative to the bracket 60 .

Referring to Figures 3, 5 and 7, shaft 90 is provided with a shoulder 94. The bottom end 92 of the shaft 90 is threaded into the fixed hub 67 of the bracket 60 so that when assembling the compressor 1000 the user can tighten the shoulder 94 against the upper side of the rolling bearing 34 by twisting the shaft 90 341 to push the retainer 33 and the rotor 32 to move in a direction away from the stator 31 , thereby further overcoming the magnetic attraction between the stator 31 and the rotor 32 to position the rotor 32 to be spaced apart from the stator 31 . The retainer 33 and the driving mechanism 70 apply a torque to the rolling bearing 34, and the shaft 90 applies a reverse torque to the rolling bearing 34, thereby fixing the rolling bearing 34 and preventing the rolling bearing 34 from moving. In another embodiment of the present application, the shaft 90 can also be used separately to push the retainer 33 and the rotor 32 to move in a direction away from the stator 31 to position the rotor 32 to be spaced apart from the stator 31 .

When assembling the compressor 1000, the bracket 60 is first fixed in the casing 100 through an interference fit. Then the rolling bearing 34 is installed inside the connecting hub 331 of the retainer 33, and the retainer 33 with the rotor 32 installed is rotatably installed on the bracket 60. At this time, the rolling bearing 34 does not contact the bracket 60 but is spaced apart from the bracket 60. open. Subsequently, the stator 31 is fixed to the motor cover 50 through bolts, and the motor cover 50 is fixed to the bracket 60 through bolts, so that the stator 31 is fixed to the bracket 60 to achieve the fixation of the motor 30 . At this time, the stator 31 and the rotor 32 are attracted to each other due to magnetic attraction. Thereafter, the receiving hub 71 of the driving mechanism 70 is passed through the central holes of the stator 31 and the rotor 32 , so that the driving mechanism 70 is threadedly connected to the connecting hub 331 of the retainer 33 using the second end 712 of the receiving hub 71 and passes through The spinning method drives the retainer 33 and the rotor 32 to move downward until the lower side 342 of the rolling bearing (more specifically, the radially inner portion of the lower side 342 ) abuts against the top end 681 of the fixed hub 67 of the bracket 60 . Wherein, by threading the receiving hub 71 of the driving mechanism 70 to the connecting hub 331 , the second end 712 of the receiving hub 71 is pushed against the roller in a direction away from the stator 31 . on the upper side 341 of the dynamic bearing 34 (at this time, the rolling bearing 34 drives the retainer 33 and the rotor 32 to move in the direction away from the stator 31), so that the rolling bearing 34 is completely fixed between the receiving hub 71 and the connecting hub 331 ( More specifically, it is fixed between the second end 712 of the receiving hub 71 and the radial protrusion 33111 of the connecting hub 331), thereby positioning the rotor 32 to be spaced apart from the stator 31 and between the stator 31 and the rotor 32. Keep the required gap between them.

Thereafter, the shaft 90 is installed on the bracket 60 by threading the bottom end 92 of the shaft 90 into the fixed hub 67 of the bracket 60 so that the shoulder 94 of the shaft 90 is pushed against the rolling bearing in a direction away from the stator 31 on the upper side 341 of 34 (at this time, the rolling bearing 34 drives the retainer 33 and the rotor 32 to move further in the direction away from the stator 31), until the lower side 342 of the rolling bearing 34 abuts the top end of the fixed hub 67 of the bracket 60 681 (at this time, the rolling bearing 34 is installed in place, and the shaft 90 cannot further push the rolling bearing 34 to move, which means that the rotor 32, the retainer 33 and the driving mechanism 70 are also installed in place), thereby further maintaining the relationship between the rotor 32 and the stator 31 the required gap.

Those skilled in the art can understand that the above-described embodiments are exemplary and can be improved by those skilled in the art. The structures described in the various embodiments do not conflict in structure or principle. can be freely combined.

After describing the preferred embodiments of the present invention in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the appended claims, and the present invention is not limited to Implementations limited to the exemplary embodiments set forth in the specification.

Claims

A compressor including:

case;

A first scroll member and a second scroll member are located in the housing. The first scroll member has a first end plate and a first scroll extending from the first end plate toward the second scroll member. The second scroll member having a second end plate and a second scroll extending from the second end plate toward the first scroll, the second scroll intermeshing with the first scroll to define a compression chamber therebetween;

A motor, including a stator and a rotor, is located on a side of the second scroll member away from the first scroll member, and is used to drive the first scroll member to rotate through the rotor to drive the second scroll member to rotate;

a drive mechanism including a receiving hub and a flange extending radially from a first end of the receiving hub and supporting a second end plate;

Wherein, the second end of the receiving hub is fixed to the rotor to position the rotor to be spaced apart from the stator with a certain gap.
The compressor of claim 1, further comprising:

a retainer to hold the rotor to;

wherein the second end of the receiving hub is fixed to a retainer radially inside the rotor to position the rotor spaced apart from the stator.
The compressor according to claim 2, wherein

The retainer has a connecting hub part and a cylindrical fixing part, so that the rotor is fixed to the fixing part outside the connecting hub part, and the second end of the receiving hub part is threadedly connected to the connecting hub part inside the connecting hub part.
The compressor of claim 3, further comprising:

A rolling bearing is installed inside the connecting hub of the retainer and the second end of the receiving hub is abutted against its upper side.
The compressor of claim 4, further comprising:

a bracket fixed to the housing and against the underside of the rolling bearing for supporting the retainer; and

A shaft, fixed to the bracket and extending from the bracket into the receiving hub, is provided with a shoulder against said upper side of the rolling bearing to further position the rotor spaced apart from the stator.
The compressor of claim 5, wherein the bracket is provided with:

a fixed hub into which the bottom end of the shaft extends and is threaded;

a cylindrical receiving portion for accommodating the motor and retainer; and

The step portion is connected between the receiving portion and the fixed hub portion for accommodating the rolling bearing, so that the lower side of the rolling bearing abuts against the top end of the fixed hub portion.
The compressor according to claim 6, wherein

The top end of the shaft is located in the receiving hub and is provided with a receiving hole. The second end plate is provided with a mounting hub extending in a direction away from the first scroll, and the mounting hub is received in the receiving hole.
The compressor of claim 7, further comprising:

a pump having a top end operably connected to a mounting hub of said second end plate in a receiving hole and a bottom end extending into an oil sump located at the bottom of the housing,

Wherein, the shaft is provided with a feed channel extending from its bottom end to its top end, and the pump is rotatably disposed in the feed channel to feed oil along a gap between the pump and the feed channel.
The compressor according to any one of claims 5 to 8, further comprising:

A first shroud, secured to the bracket to cover the motor, is located between the stator and the flange and extends through the receiving hub, wherein the stator is affixed to the first shroud.
The compressor of claim 9, further comprising:

a second cover, the top of the second cover covering and being secured to the first end plate, and the side walls of the second cover being secured to the flange.
The compressor according to any one of claims 1 to 8 and 10, wherein the rotor is located on a side of the stator facing away from the first cover.
The compressor according to claim 7 or 8, wherein

The central axis of the receiving hole of the shaft is collinear with the rotation axis of the second scroll member, the central axis of the top end of the shaft is collinear with the rotation axis of the first scroll member, and the central axis of the receiving hole is aligned with the rotation axis of the shaft. The central axis of the top end deviates, so that the rotation axis of the second scroll deviates from the rotation axis of the first scroll.
The compressor according to any one of claims 1 to 8 and 10, wherein,

The gap is in the range of 0.1mm to 3mm.
A method of assembling a compressor, which compressor includes: a casing, a bracket with a fixed hub, a motor with a stator and a rotor, a retainer with a hub connection, a rolling bearing, and a drive mechanism with accommodating the hub, Wherein, the method includes,

Fix the bracket in the housing;

Install the rolling bearing on the inside of the connecting hub of the cage;

rotatably mounting the holder on which the rotor is mounted to the bracket and fixing the stator to the bracket, wherein the stator and the rotor are attracted to each other due to magnetic attraction; and

The drive mechanism is mounted to the retainer by threading the receiving hub of the drive mechanism to the connecting hub of the retainer, so that one end of the receiving hub is pushed against the upper surface of the rolling bearing in a direction away from the stator. On the other side, the retainer is driven to move with the rotor in a direction away from the stator, thereby positioning the rotor to be spaced apart from the stator.
The method of claim 14, the compressor further comprising a shaft having a shoulder, the method further comprising:

The shaft is mounted on the bracket by fixing the bottom end of the shaft into the fixed hub of the bracket so that the shoulder of the shaft pushes against the upper side of the rolling bearing in a direction away from the stator, up to the lower side of the rolling bearing. side against the top end of the fixed hub of the bracket so that Further maintain the gap between the rotor and stator.
The method of claim 14 or 15, the compressor further comprising: a first cover, wherein the step of fixing the stator to the bracket includes fixing the stator to the first cover and subsequently fixing the first cover to on the stand.