CN108953143B

CN108953143B - Scroll compressor and air conditioner with same

Info

Publication number: CN108953143B
Application number: CN201811069840.8A
Authority: CN
Inventors: 魏会军; 刘双来; 刘磊; 付猛; 律刚; 方琪; 褚双双; 赵玉晨
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2018-09-13
Filing date: 2018-09-13
Publication date: 2024-01-30
Anticipated expiration: 2038-09-13
Also published as: CN108953143A

Abstract

The invention provides a scroll compressor and an air conditioner with the same, wherein the scroll compressor comprises: an upper bracket having an accommodation space; the fixed vortex plate is arranged on the upper bracket; the movable vortex plate is arranged between the upper bracket and the fixed vortex plate and meshed with the fixed vortex plate; the thrust piece is movably arranged in the accommodating space along the axial direction of the upper bracket, the thrust piece is positioned between the upper bracket and the movable scroll, a first sealing piece is arranged between the end face of the movable scroll and the end face of the thrust piece, a second sealing piece is arranged between the outer surface of the thrust piece and the upper bracket, and the space between the back surface of the movable scroll and the upper bracket is divided into a first back pressure cavity and a second back pressure cavity positioned outside the first back pressure cavity by the first sealing piece and the second sealing piece. The technical scheme of the invention effectively solves the problem that the movable scroll of the scroll compressor in the prior art is likely to be separated from the thrust component to cause leakage.

Description

Scroll compressor and air conditioner with same

Technical Field

The invention relates to the field of refrigeration, in particular to a scroll compressor and an air conditioner with the scroll compressor.

Background

In the scroll compressor, an eccentric crankshaft is driven by a motor to drive a movable scroll to run, and a plurality of compression cavities are formed with a fixed scroll to realize gas compression. In order to ensure the tightness of the compression cavity, fluid with certain pressure is generally introduced into the back of the movable scroll, so that the movable scroll and the fixed scroll are tightly attached. Meanwhile, in order to ensure that the vortex plate can be separated in time under abnormal conditions (such as sucking liquid refrigerant in the compression cavity), the vortex plate cannot be damaged due to bearing too large pressure, and a certain movable space is needed in the axial direction of the movable vortex plate.

In patent application No. 201410384217.7, a structure in which a thrust member is used to assist in supporting a movable scroll is proposed, which can achieve sealing of a compression chamber and improve reliability. However, the parts of this patent are complex in construction, inconvenient to machine and assemble, and the orbiting scroll may be separated from the thrust member to cause leakage.

In addition, since the orbiting scroll is eccentrically operated, centrifugal force generated therefrom is transferred to a supporting structure (i.e., a bearing) of the crankshaft, and a plurality of weights are required to offset the influence of the centrifugal force of the orbiting scroll. In the existing structure, the balance weight is far away from the movable vortex plate, so that the crankshaft can be deformed more, the balance is damaged, and the weight of the balance weight is increased. Resulting in increased bearing stress and increased compressor noise and vibration.

Disclosure of Invention

The invention aims to provide a scroll compressor and an air conditioner with the same, so as to solve the problem that a movable scroll of the scroll compressor in the prior art is likely to be separated from a thrust component to cause leakage.

In order to achieve the above object, according to one aspect of the present invention, there is provided a scroll compressor comprising: an upper bracket having an accommodation space; the fixed vortex plate is arranged on the upper bracket; the movable vortex plate is arranged between the upper bracket and the fixed vortex plate and meshed with the fixed vortex plate; the thrust piece is movably arranged in the accommodating space along the axial direction of the upper bracket, the thrust piece is positioned between the upper bracket and the movable scroll, a first sealing piece is arranged between the end face of the movable scroll and the end face of the thrust piece, a second sealing piece is arranged between the outer surface of the thrust piece and the upper bracket, and the space between the back surface of the movable scroll and the upper bracket is divided into a first back pressure cavity and a second back pressure cavity positioned outside the first back pressure cavity by the first sealing piece and the second sealing piece.

Further, the scroll compressor further comprises a crankshaft and a first eccentric block, wherein the crankshaft penetrates through the upper bracket and is connected with the movable scroll in a driving mode, an avoidance space is formed in the upper bracket and/or the thrust piece, and the first eccentric block is arranged on the crankshaft and can rotate in the avoidance space.

Further, one side of the upper bracket facing the thrust piece is provided with a first ladder structure to form a first avoiding part, one side of the thrust piece facing the upper bracket is provided with a second ladder structure to form a second avoiding part, and the first avoiding part and the second avoiding part are combined to form a avoiding space.

Further, the first eccentric block is sleeved on the crankshaft.

Further, a second eccentric block and a rotor are further arranged on the crankshaft, and the second eccentric block is arranged between the rotor and the upper bracket.

Further, a third eccentric block and a rotor are further arranged on the crankshaft, and the third eccentric block is arranged on one side, away from the upper bracket, of the rotor.

Further, a fixing structure is arranged between the thrust piece and the upper bracket.

Further, the fixing structure comprises a plurality of pin shafts penetrating through the thrust piece and the upper bracket.

Further, the upper bracket comprises a base body and an outer ring table, the outer ring table is arranged along the circumferential direction of the base body and surrounds to form an accommodating space, the fixed scroll and the outer ring table are arranged in a sealing mode, and the second sealing piece is arranged between the outer ring table and the thrust piece.

Further, the orbiting scroll includes an end plate disposed between the fixed scroll and the thrust member, and the first seal is disposed between two end surfaces of the thrust member opposite to the end plate.

Further, an anti-rotation structure is arranged between the thrust piece and the movable scroll.

Further, the thrust member has a stopper portion and a thrust portion, and when the upper end surface of the stopper portion abuts against the lower end surface of the fixed scroll, the movable scroll has a first state in contact with the lower end surface of the fixed scroll, a second state in contact with the upper end surface of the thrust portion, and a third state in contact with neither the lower end surface of the fixed scroll nor the upper end surface of the thrust portion.

Further, the movable scroll and the fixed scroll are meshed to form a compression cavity, and a drainage channel is further arranged in the movable scroll and is communicated with the compression cavity and the second back pressure cavity.

According to another aspect of the present invention, there is provided an air conditioner including a scroll compressor, which is the above-described scroll compressor.

By applying the technical scheme of the invention, the thrust piece is floatably arranged in the accommodating space of the upper bracket, and the first sealing piece and the second sealing piece form a first back pressure cavity and a second back pressure cavity on the back surface of the movable scroll. The compression cavity and the two back pressure cavities respectively provide pressure on two sides of the movable scroll, the first back pressure cavity and the second back pressure cavity respectively provide pressure on two sides of the thrust piece, and the movable scroll and the thrust piece can float in the accommodating space of the upper bracket according to the pressure size of the compression cavity, the first back pressure cavity and the second back pressure cavity and the change of the difference value, so that the tightness of the compression cavity is kept and the pressure between the movable scroll and the fixed scroll of the scroll compressor under different working conditions is adjusted. Simultaneously, the first sealing piece is arranged on the thrust piece and can move along with the movement of the thrust piece, so that the movement amplitude of the first sealing piece relative to the movable scroll is reduced, the tightness of the first back pressure cavity, the second back pressure cavity and the compression cavity can be always ensured by the first sealing piece, and the occurrence of the condition of refrigerant leakage is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic cross-sectional structural view of an embodiment of a scroll compressor according to the present invention;

FIGS. 2-4 illustrate enlarged partial views of the scroll compressor of FIG. 1 in three operating conditions; and

fig. 5 shows a schematic structural view of a crankshaft of the scroll compressor of fig. 1.

Wherein the above figures include the following reference numerals:

1. a housing; 2. a stator; 3. a rotor; 4. a lower bracket; 6. a cross slip ring; 7. a crankshaft; 7a, a head; 8. an orbiting scroll; 8a, end plates; 8c, moving vortex teeth; 8d, a drainage channel; 9. a fixed scroll; 9b, static vortex teeth; 10. a first seal; 11. a first back pressure chamber; 12. a second back pressure chamber; 13. a second seal; 14. a thrust piece; 14a, a limiting part; 14b, a thrust portion; 14e, pin holes; 14f, a boss portion; 15. a second seal; 16. an upper bracket; 16a, an outer ring stage; 17. a pin shaft; 18. a first eccentric block; 19. a second eccentric block; 20. and a third eccentric block.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 5, the scroll compressor of the present embodiment includes an upper bracket 16, a fixed scroll 9, an orbiting scroll 8, and a thrust piece 14 provided in a housing 1. The upper bracket 16 is provided with a containing space, the fixed scroll 9 is arranged on the upper bracket 16, and the movable scroll 8 is arranged between the upper bracket 16 and the fixed scroll 9 and is meshed with the fixed scroll 9 to form a compression cavity. The thrust member 14 is movably disposed in the accommodation space in the axial direction of the upper bracket 16, and the thrust member 14 is located between the upper bracket 16 and the orbiting scroll 8. A first seal 10 is provided between the end face of the orbiting scroll 8 and the end face of the thrust member 14, a second seal 13 is provided between the outer surface of the thrust member 14 and the upper bracket 16, and the first seal 10 and the second seal 13 divide the space between the back face of the orbiting scroll 8 and the upper bracket 16 into a first back pressure chamber 11 and a second back pressure chamber 12 located outside the first back pressure chamber 11.

With the technical solution of the present embodiment, the thrust member 14 is floatably provided in the accommodation space of the upper bracket 16, and the first seal member 10 and the second seal member 13 form the first back pressure chamber 11 and the second back pressure chamber 12 on the back surface of the orbiting scroll 8. The compression chamber and the two back pressure chambers respectively provide pressure on two sides of the movable scroll 8, the first back pressure chamber 11 and the second back pressure chamber 12 respectively provide pressure on two sides of the thrust piece 14, and the movable scroll 8 and the thrust piece 14 can float in the accommodating space of the upper bracket 16 according to the changes of the pressure sizes and the difference values of the compression chamber, the first back pressure chamber 11 and the second back pressure chamber 12, so that the tightness of the compression chamber is maintained, and the pressure between the movable scroll 8 and the fixed scroll 9 of the scroll compressor under different working conditions is adjusted. Meanwhile, the first sealing element 10 is arranged on the thrust piece 14 and can move along with the movement of the thrust piece 14, so that the movement range of the first sealing element 10 relative to the movable scroll 8 is reduced, the tightness of the first back pressure cavity 11, the second back pressure cavity 12 and the compression cavity can be always ensured by the first sealing element 10, and the occurrence of the condition of refrigerant leakage is prevented.

The orbiting scroll 8 of the scroll compressor of the present embodiment includes an end plate 8a and an orbiting scroll 8c, the end plate 8a being provided between the fixed scroll 9 and the thrust piece 14, the orbiting scroll 8c being provided on a side of the end plate 8a facing the fixed scroll 9, and the first seal 10 being provided between both end faces of the thrust piece 14 opposite to the end plate 8 a. The fixed scroll 9 includes a fixed scroll 9b, and the movable scroll 8c and the fixed scroll 9b are engaged to form a plurality of crescent-shaped compression chambers, and the refrigerant moves with respect to the fixed scroll 9 while the pressure rise is gradually achieved through each compression chamber. In this embodiment, a drainage channel 8d is further provided in the end plate 8a of the orbiting scroll 8, and the drainage channel 8d communicates one of the compression chambers with the second back pressure chamber 12, so as to provide a back pressure for the orbiting scroll 8.

Specifically, as shown in fig. 1 to 4, the upper bracket 16 of the scroll compressor of the present embodiment includes a base body and an outer ring stage 16a, the outer ring stage 16a is arranged in the circumferential direction of the base body and surrounds to form a receiving space, the fixed scroll 9 is abutted against and sealed to an end face of the outer ring stage 16a, and the second seal 13 is provided between the outer ring stage 16a and the thrust piece 14. The structure is simple, and the design, the production and the installation are easy.

As shown in fig. 2 to 4, the thrust member 14 of the present embodiment has a stopper portion 14a, a thrust portion 14b, and a boss portion 14f, the boss portion 14f being for accommodating the first seal member 10. With the movement of the thrust piece 14 in the accommodation space, the stopper portion 14a can be brought into contact with or separated from the fixed scroll 9, and in the case where the upper end surface of the stopper portion 14a is brought into contact with the lower end surface of the fixed scroll 9, the movable scroll 8 has a first state of being in contact with the lower end surface of the fixed scroll 9, a second state of being in contact with the upper end surface of the thrust portion 14b, and a third state of being in contact with neither the lower end surface of the fixed scroll 9 nor the upper end surface of the thrust portion 14 b.

When the compressor is operated, the movable scroll 8 moves in a translational motion around the axis of the crankshaft 7 with a fixed radius, so that a plurality of mutually isolated compression cavities with continuously changing volumes are generated between the movable scroll 8 and the movable scroll 8c and the fixed scroll 9b of the fixed scroll 9. The compression chamber compresses the sucked refrigerant and discharges the compressed refrigerant into the inner space of the hermetic case 1. As the refrigerant is compressed in the compression chamber, the pressure rises, and a force separating the orbiting scroll 8 and the fixed scroll 9 tends to be generated. This force tends to move the orbiting scroll 8 away from the non-orbiting scroll 9, thereby causing leakage between the various compression chambers and resulting in reduced compressor performance.

To limit this separation, a back pressure having an average pressure higher than the suction pressure may be introduced to the back of the end plate 8a of the movable scroll 8, and the movable scroll 8 may be pressed against the fixed scroll 9 by means of the back pressure. In the present embodiment, the first back pressure chamber 11 communicates with the compressed exhaust gas at a pressure approximately equal to the exhaust pressure Pd; the pressure Pm of the second back pressure chamber 12 is between the suction pressure Ps and the discharge pressure Pd.

Assuming that the separation force generated by the compression chamber is of the magnitude Fa, it can be approximately understood that: the acting surface of the compression chamber to the movable scroll 8 is a circle with an area a, the acting surface of the first back pressure chamber 11 to the movable scroll 8 is a circle with an area b, and the acting surface of the second back pressure chamber 12 to the movable scroll 8 is a circle with an area c, then the following can be obtained:

back pressure fb=pm× (a-b) +pd×b generated by the fluid in the first back pressure chamber 11 and the second back pressure chamber 12 to the movable scroll 8;

the pressures fc= (Pd-Pm) x (c-b) generated by the fluid in the first back pressure chamber 11 and the second back pressure chamber 12 to the thrust member 14;

fig. 2 shows the stress and movement states of the components of the scroll compressor according to the present embodiment under a certain working condition in which the discharge and suction pressures are relatively high. At this time, the exhaust pressure Pd is high, fb > Fa. The orbiting scroll 8 is closely fitted with the fixed scroll 9 by means of the back pressure Fb. The thrust piece 14 moves upwards under the action of the pressure Fc until the limiting part 14a abuts against the fixed scroll 9, and the distance H between the thrust piece 14 and the base body of the upper bracket 16 is the largest (which can be designed to be 20-120 μm according to practical situations). Preferably, the distance from the stopper 14a to the stopper 14b in this embodiment is about 5-20 μm greater than the thickness of the movable disk end plate 8a, so that the stopper 14b and the movable scroll 8 have a small gap h. Therefore, at this time, the compression chambers can be well sealed, and the pressing force between the movable scroll 8 and the fixed scroll 9 is small, which is only: f=fb-fa=pm× (a-b) +pd×b-Fa.

Fig. 3 shows the stress and movement states of the components of the scroll compressor of the present embodiment under certain conditions of low discharge and suction pressures. At this time, the exhaust pressure Pd is low, the suction-exhaust pressure difference is small, fb < Fa. The orbiting scroll 8 is separated from the fixed scroll 9 by the separation force Fa, the orbiting scroll 8 is in contact with the thrust portion 14b of the thrust piece 14, and the thrust piece 14 provides an additional force Fc to the orbiting scroll 8. At this point, the force Fc generated by the fluid against the thrust member 14 is > Fa-Fb.

Therefore, the thrust piece 14 still moves upward by the distance H under the force Fc, and the stopper portion 14a contacts the fixed scroll 9. However, in this case, a small gap h exists between the fixed scroll 9 and the movable scroll 8. At this time, a certain leakage exists between the compression chambers, but h can be controlled to be as low as 5-10 μm when the processing conditions are satisfied, so that the leakage is greatly reduced, and the performance of the compressor is still kept high.

Fig. 4 shows the stress and movement states of the respective members in the case where the separation force of the scroll compressor of the present embodiment is abnormally increased. For example, when impurities exist in the compressor or excessive liquid is sucked in, the separation force Fa increases sharply, and at this time the separation force Fa > fb+fc.

The movable scroll 8 is separated from the fixed scroll 9 by the separation force Fa, and the movable scroll end plate back surface 8b is in contact with the thrust portion 14b of the thrust member 14. The thrust piece 14 falls back onto the upper bracket 16 due to the excessive separation force, and the limit part 14a is separated from the fixed scroll 9. At this time, a large gap h+h exists between the fixed scroll 9 and the movable scroll 8, and serious leakage is generated between the compression chambers, so that the separation force is reduced Fa, and impurities are discharged out of the compression chambers, thereby avoiding damage to compressor parts caused by an excessively high separation force.

With reference to fig. 2 to 4, the scroll compressor of the present embodiment achieves flexible thrust of the movable scroll 8 by the thrust member 14, improves the sealing performance, and does not generate excessive abutment pressure.

In other embodiments not shown in the figures, the second back pressure chamber may be in communication with the suction gas such that its pressure is substantially equal to the suction gas pressure Ps.

A fixing structure is provided between the thrust member 14 and the upper bracket 16 in this embodiment, and the fixing structure is used to prevent the thrust member 14 and the upper bracket 16 from moving relatively. Specifically, as shown in fig. 2 to 4, the fixing structure includes a plurality of pin shafts 17 penetrating in the thrust member 14 and the upper bracket 16, and one portion of the pin shafts 17 is inserted into the upper bracket 16 and the other portion is inserted into the pin holes 14e of the thrust member 14. The pin 17 allows the thrust member 14 to float only in the axial direction of the upper bracket 16 and not move or rotate relative to the upper bracket 16 to ensure a sealing effect.

In other embodiments not shown in the figures, the pin may be replaced with a key structure or other structure to limit the movement of the push member.

An anti-rotation structure is provided between the thrust piece 14 and the movable scroll 8 in this embodiment to restrict the movement of the movable scroll 8. Specifically, the anti-rotation structure of the present embodiment is the cross slip ring 6.

As shown in fig. 5, the scroll compressor of the present embodiment further includes a lower bracket 4 and a motor structure, the lower bracket 4 is used for fixing a crankshaft 7, the motor structure includes a stator 2 and a rotor 3, the crankshaft 7 is inserted in the rotor 3, a head 7a of the crankshaft 7 is in driving connection with a movable scroll 8, and the crankshaft 7 drives the movable scroll 8 to move relative to a fixed scroll 9 under the driving of the rotor 3, so as to implement compression.

Since the orbiting scroll 8 is eccentrically disposed with respect to the axis of the crankshaft 7, the head 7a of the crankshaft 7 is also eccentric. As shown in FIG. 5, when the crankshaft 7 rotates, the orbiting scroll 8 and the head 7a will generate centrifugal force F _{Dynamic movement} And centrifugal moment F _{Dynamic movement} X L. To balance the centrifugal force F _{Dynamic movement} And centrifugal moment F _{Dynamic movement} The upper bracket 16 and the thrust piece 14 of the embodiment are provided with an avoidance space, the crankshaft 7 is further provided with a first eccentric block 18, and the first eccentric block 18 can rotate in the avoidance space. Scheme commonly used in industryThe eccentric block is arranged in the middle of the crankshaft or at one end of the crankshaft far away from the movable vortex plate, and the eccentric block in the common scheme can generate additional moment due to the fact that the distance is far, and applies a large load to the crankshaft, so that deformation is easy to generate. In contrast to conventional solutions, the first eccentric mass 18 can directly balance a portion of the centrifugal force F ₀ And this embodiment has shortened the distance of first eccentric block 18 and moving vortex dish 8, has avoided eccentric block and moving vortex dish distance great problem of moment of torsion on the bent axle that leads to, is favorable to guaranteeing scroll compressor's stability more.

Specifically, as shown in fig. 2, a first step structure is disposed on a side of the upper bracket 16 facing the thrust member 14 to form a first avoidance portion, a second step structure is disposed on a side of the thrust member 14 facing the upper bracket 16 to form a second avoidance portion, and the first avoidance portion and the second avoidance portion are combined to form a avoidance space.

Preferably, the first eccentric mass 18 of the present embodiment is sleeved on the crankshaft 7 and is in interference fit with the crankshaft 7.

To further enhance the balancing effect, the crankshaft 7 of the present embodiment is further provided with a second eccentric mass 19 and a third eccentric mass 20, the second eccentric mass 19 being disposed between the rotor 3 and the upper bracket 16 and being capable of balancing the centrifugal force F ₁ The third eccentric mass 20 is arranged on the side of the rotor 3 remote from the upper support 16 and is capable of balancing the centrifugal force F ₂ The centrifugal force of the crankshaft is balanced by the eccentric blocks, so that the stress of the crankshaft is more uniform, the load is reduced, and the noise and vibration during operation are reduced and the deformation amount is reduced.

The present application also provides an air conditioner (not shown in the drawings) according to the present embodiment, which includes a scroll compressor, and the scroll compressor is a scroll compressor including all or part of the above-described technical structure. The air conditioner of the embodiment has the advantages of stable operation of the compressor and difficult leakage, and further has the advantages of long service life and long maintenance period.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

the thrust member is floatably provided in the accommodation space of the upper bracket, and the first seal member and the second seal member form a first back pressure chamber and a second back pressure chamber at the back surface of the orbiting scroll. The compression cavity and the two back pressure cavities respectively provide pressure on two sides of the movable scroll, the first back pressure cavity and the second back pressure cavity respectively provide pressure on two sides of the thrust piece, and the movable scroll and the thrust piece can float in the accommodating space of the upper bracket according to the pressure size of the compression cavity, the first back pressure cavity and the second back pressure cavity and the change of the difference value, so that the tightness of the compression cavity is kept and the pressure between the movable scroll and the fixed scroll of the scroll compressor under different working conditions is adjusted. Simultaneously, the first sealing piece is arranged on the thrust piece and can move along with the movement of the thrust piece, so that the movement amplitude of the first sealing piece relative to the movable scroll is reduced, the tightness of the first back pressure cavity, the second back pressure cavity and the compression cavity can be always ensured by the first sealing piece, and the occurrence of the condition of refrigerant leakage is prevented.

In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A scroll compressor, comprising:

an upper bracket (16), the upper bracket (16) having an accommodation space;

a fixed scroll (9) arranged on the upper bracket (16);

an orbiting scroll (8) provided between the upper frame (16) and the fixed scroll (9) and engaged with the fixed scroll (9);

the anti-thrust piece (14) is movably arranged in the accommodating space along the axial direction of the upper bracket (16), the anti-thrust piece (14) is positioned between the upper bracket (16) and the movable scroll (8), a first sealing piece (10) is arranged between the end face of the movable scroll (8) and the end face of the anti-thrust piece (14), a second sealing piece (13) is arranged between the outer surface of the anti-thrust piece (14) and the upper bracket (16), and the first sealing piece (10) and the second sealing piece (13) divide the space between the back surface of the movable scroll (8) and the upper bracket (16) into a first back pressure cavity (11) and a second back pressure cavity (12) positioned outside the first back pressure cavity (11);

the scroll compressor further comprises a crankshaft and a first eccentric block, the crankshaft penetrates through the upper support (16) and is in driving connection with the movable scroll (8), an avoidance space is formed in the upper support (16) and the thrust piece (14), and the first eccentric block is arranged on the crankshaft and can rotate in the avoidance space.

2. The scroll compressor of claim 1, wherein a side of the upper bracket (16) facing the thrust member (14) is provided with a first stepped structure to form a first escape portion, a side of the thrust member (14) facing the upper bracket (16) is provided with a second stepped structure to form a second escape portion, and the first escape portion and the second escape portion are combined to form the escape space.

3. The scroll compressor of claim 1, wherein the first eccentric mass is sleeved on the crankshaft.

4. The scroll compressor of claim 1, wherein a second eccentric mass and a rotor are further disposed on the crankshaft, the second eccentric mass being disposed between the rotor and the upper bracket.

5. The scroll compressor of claim 1, wherein a third eccentric mass and a rotor are further provided on the crankshaft, the third eccentric mass being disposed on a side of the rotor remote from the upper bracket.

6. The scroll compressor of claim 1, wherein a securing structure is provided between the thrust member (14) and the upper bracket (16).

7. The scroll compressor of claim 6, wherein the securing structure includes a plurality of pins extending through the thrust member (14) and the upper bracket (16).

8. A scroll compressor as claimed in claim 1, wherein the upper bracket (16) comprises a base body and an outer annular land (16 a), the outer annular land (16 a) being arranged circumferentially of the base body and surrounding the receiving space, the non-orbiting scroll (9) being sealingly arranged between the outer annular land (16 a), the second seal (13) being arranged between the outer annular land (16 a) and the thrust member (14).

9. A scroll compressor according to claim 1, wherein the orbiting scroll (8) comprises an end plate (8 a), the end plate (8 a) being arranged between the fixed scroll (9) and the thrust member (14), the first seal (10) being arranged between two end surfaces of the thrust member (14) opposite to the end plate (8 a).

10. A scroll compressor as claimed in claim 1, wherein an anti-rotation structure is provided between the thrust member (14) and the orbiting scroll (8).

11. The scroll compressor according to claim 1, wherein the thrust member (14) has a stopper portion (14 a) and a thrust portion (14 b), and the movable scroll (8) has a first state in contact with the lower end surface of the fixed scroll (9), a second state in contact with the upper end surface of the thrust portion (14 b), and a third state in contact with neither the lower end surface of the fixed scroll (9) nor the upper end surface of the thrust portion (14 b) when the upper end surface of the stopper portion (14 a) abuts against the lower end surface of the fixed scroll (9).

12. A scroll compressor according to claim 1, wherein the orbiting scroll (8) and the non-orbiting scroll (9) are engaged to form a compression chamber, and a drainage channel is further provided in the orbiting scroll (8), the drainage channel communicating the compression chamber with the second back pressure chamber (12).

13. An air conditioner comprising a scroll compressor, wherein the scroll compressor is the scroll compressor of any one of claims 1 to 12.