Scroll compressor with self-oil-return structure

Abstract

The invention provides a scroll compressor with an automatic oil return structure, which comprises a shell, a fixed scroll part, a movable scroll part, an exhaust valve, an oil return isolation plate and a high-low pressure isolation plate, and the lower ends of the movable scroll part and the fixed scroll part are matched and connected to form a low-pressure cavity and a high-pressure cavity; the high-low pressure isolation plate is installed on the shell and connected to the upper end of the fixed vortex component, the oil return isolation plate is arranged at the upper end of the high-low pressure isolation plate, a cavity A is formed between the oil return isolation plate and the high-low pressure isolation plate, the exhaust valve is installed at the upper end of the fixed vortex component and located in the cavity A. An exhaust hole is formed in the fixed vortex component, one end of the exhaust hole is connected with a high-pressure cavity, and the other end of the exhaust hole is connected with a low-pressure cavity. The other end is connected with the chamber A through an exhaust valve; an oil return structure communicated with the cavity A is arranged on the oil return isolation plate and the high-low pressure isolation plate and communicated with the compressor oil pool through the high-low pressure isolation plate. Refrigeration oil can be effectively controlled to enter the refrigeration system, the oil return problem of the compressor is solved, and the heat exchange efficiency of the system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of scroll compressor manufacturing, and in particular to a scroll compressor with a self-oil return structure. Background Art

[0002] A scroll compressor is a positive displacement compressor. Existing scroll compressors include a fixed scroll component and a movable scroll component with involute blades. The movable scroll component cooperates with the fixed scroll component to form multiple compression chambers with variable volumes. The motor drives the crankshaft to drive the movable scroll component to operate along a certain rotation radius, thereby completing the intake, compression and discharge of gas. The shortcomings of existing scroll compressors are that when the scroll is operated under specific working conditions, especially in the low evaporation refrigeration field or high pressure difference conditions, the movable and fixed scrolls need a large oil-loaded refrigerant to solve the wear or leakage problems, and the oil return problem of the large oil-loaded compressor restricts the reliability of the compressor and the system energy efficiency. Summary of the invention

[0003] According to the above-mentioned technical problems of low compression efficiency and low energy efficiency in the existing scroll compressors, a scroll compressor with a self-oil return structure is provided to solve the oil return problem of a compressor with a large oil circulation volume by increasing the oil circulation volume.

[0004] The technical means adopted by the present invention are as follows:

[0005] A scroll compressor with a self-returning oil structure comprises: a housing, and a fixed scroll component, a movable scroll component, an exhaust valve, an oil return isolation plate and a high-low pressure isolation plate arranged inside the housing, wherein the movable scroll component is connected with the lower end of the fixed scroll component to form a low-pressure chamber and a high-pressure chamber;

[0006] The high-low pressure isolation plate is installed on the housing and is sealed and connected to the upper end of the fixed scroll component. The oil return isolation plate is arranged at the upper end of the high-low pressure isolation plate, and a chamber A is formed between the oil return isolation plate and the high-low pressure isolation plate. The exhaust valve is installed at the upper end of the fixed scroll component and is located in the chamber A. The fixed scroll component is provided with an exhaust hole, one end of the exhaust hole is connected to the high pressure chamber, and the other end is connected to the chamber A through the exhaust valve.

[0007] The oil return isolation plate and the high-low pressure isolation plate are provided with an oil return structure connected to the chamber A, and the oil return structure is finally connected to the compressor oil pool through the high-low pressure isolation plate.

[0008] Further, the oil return structure includes a first oil return structure and a second oil return structure, and the first oil return structure is provided with at least one group;

[0009] The first oil return structure is an oil return channel opened on the oil return isolation plate, the middle part of the oil return isolation plate is a cylindrical structure connected to the chamber A, and the oil return channel on the oil return isolation plate is arranged on the lower inner wall of the oil return isolation plate close to the shell and / or the lower inner wall of the oil return isolation plate below the cylindrical structure;

[0010] The second oil return structure is an oil return channel C opened on the high-low pressure isolation plate near the shell. There are multiple oil return channels C distributed on both sides of the high-low pressure isolation plate.

[0011] Furthermore, the oil return channel opened on the oil return isolation plate near the lower inner wall of the shell is the oil return channel B. The oil return channel B has an inclined structure and is opened along the circumference of the oil return isolation plate.

[0012] Furthermore, an oil filter channel B is also provided on the lower inner wall of the oil return isolation plate. The oil filter channel B is connected to the oil return channel B and is located obliquely above the oil return channel B.

[0013] Furthermore, the oil filter channel B is a multi-circle spiral channel structure opened along the circumferential side wall of the oil return isolation plate.

[0014] Furthermore, the oil return channel opened on the lower inner wall of the oil return isolation plate below the cylindrical structure is the oil return channel A, and the oil return channel A consists of a connected inclined channel and a horizontal channel, and is opened along the circumference of the oil return isolation plate.

[0015] Furthermore, an oil filter channel A is opened on the inner wall of the cylindrical structure, and the oil filter channel A is communicated with the oil return channel A and is located above the oil return channel A.

[0016] Furthermore, the oil filter channel A is a multi-circle spiral channel structure opened along the circumferential inner wall of the cylindrical structure.

[0017] Furthermore, it also includes an auxiliary isolation plate installed on the upper end of the high and low pressure isolation plate and located in chamber A. The auxiliary isolation plate is in a cylindrical structure and has a notch on one side wall. The notch connects chamber A and the interior of the auxiliary isolation plate. The exhaust hole is connected to the interior of the auxiliary isolation plate and chamber A through an exhaust valve. There is a gap between the top of the auxiliary isolation plate and the return oil isolation plate.

[0018] Furthermore, the exhaust valve includes a valve plate and a valve plate limiting structure, the valve plate is arranged at the top of the exhaust hole, and the valve plate limiting structure is installed at the upper end of the fixed vortex component for limiting the valve plate; the exhaust direction of the exhaust hole at the valve plate is in the same direction as the notch of the auxiliary isolation plate, and the gaseous refrigerant is introduced into the oil return structure through the notch.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention provides a scroll compressor with a self-return oil structure. In the field of refrigeration or in a high-pressure differential compressor, while solving the reliability and energy efficiency problems through a high oil circulation volume, the present invention faces the oil return problem. The oil return structure is arranged on the vortex exhaust side, and the oil and gas are effectively separated through a vortex oil filter channel. The gaseous refrigerant is smoothly discharged through a gas siphon structure, and the separated refrigeration oil is smoothly returned to the compressor oil pool through the high and low pressure differential. The refrigeration oil can be effectively controlled to enter the refrigeration system, thereby solving the compressor oil return problem and improving the heat exchange efficiency of the system.

[0021] Based on the above reasons, the present invention can be widely promoted in the fields of scroll compressor manufacturing technology and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of a scroll compressor with a self-return oil structure according to the present invention Figure I .

[0024] Figure 2 A schematic diagram of a scroll compressor with a self-return oil structure according to the present invention Figure II .

[0025] Figure 3 This is a detailed view of the oil return isolation plate of the present invention.

[0026] Figure 4 This is a top view of the auxiliary isolation plate of the present invention.

[0027] Figure 5 It is a top view of the high and low pressure partitions of the present invention.

[0028] In the figure: 10, fixed scroll component; 20, movable scroll component; 30, valve plate; 40, valve plate limiting structure; 50, return oil isolation plate; 60, auxiliary isolation plate; 70, high and low pressure isolation plates; 80, chamber A; 91, oil filter channel A; 92, oil filter channel B; 101, return oil channel A; 102, return oil channel B; 103, return oil channel C. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 1As shown, a scroll compressor with a self-return oil structure includes: a housing and a fixed scroll component 10, a movable scroll component 20, a valve plate 30, a valve plate limiting structure 40, an oil return isolation plate 50, an auxiliary isolation plate 60, and a high-low pressure isolation plate 70 arranged inside the housing. The movable scroll component 20 is connected to the lower end of the fixed scroll component 10 to form a low-pressure chamber and a high-pressure chamber. The high-low pressure isolation plate 70 is installed on the housing and sealed to the upper end of the fixed scroll component 10. The oil return isolation plate 50 is arranged at the upper end of the high-low pressure isolation plate 70, and a chamber A80 is formed between the oil return isolation plate 50 and the high-low pressure isolation plate 70. The exhaust valve is installed at the upper end of the fixed scroll component 10 and is located in the chamber A80. An exhaust hole is opened on the fixed scroll component 10, one end of the exhaust hole is connected to the high-pressure chamber, and the other end is connected to the chamber A80 through the exhaust valve. The auxiliary isolation plate 60 is installed at the upper end of the high and low pressure isolation plate 70 and is located in the chamber A80. The auxiliary isolation plate 60 is a cylindrical structure with a notch on one side wall. The notch connects the chamber A80 and the interior of the auxiliary isolation plate 60. The exhaust hole is connected to the interior of the auxiliary isolation plate 60 and the chamber A80 through the exhaust valve. There is a gap between the top of the auxiliary isolation plate 60 (cylindrical top) and the oil return isolation plate 50, and the gap is a circumferential flow channel. The valve plate 30 is arranged at the top of the exhaust hole, and the valve plate limiting structure 40 is installed at the upper end of the fixed scroll component 10 to limit the valve plate 30. The valve plate limiting structure 40 adopts a limiting plate. The exhaust direction of the exhaust hole at the valve plate 30 is in the same direction as the notch of the auxiliary isolation plate 60, and the gaseous refrigerant is introduced into the oil return structure through the notch.

[0038] The oil return structure specifically includes an oil filter channel A91, an oil filter channel B92, an oil return channel A101, an oil return channel B102, and an oil return channel C103. The oil filter channel A91, the oil filter channel B92, the oil return channel A101, and the oil return channel B102 are provided on the oil return isolation plate 50, and the oil return channel C103 is provided on the high-low pressure isolation plate 70. In this embodiment, six oil return channels C103 are provided, which can be symmetrically distributed on the left and right sides of the high-low pressure isolation plate 70 along the circumferential direction.

[0039] The oil return channel B102 and the oil filter channel B92 are both opened on the oil return isolation plate 50 near the lower inner wall of the shell. The oil return channel B102 is an inclined structure and is opened along the circumference of the oil return isolation plate 50. The oil filter channel B92 is connected to the oil return channel B102 and is located obliquely above the oil return channel B102. The oil filter channel B92 is a multi-turn spiral channel structure opened along the circumferential side wall of the oil return isolation plate 50.

[0040] The middle part of the oil return isolation plate 50 is a cylindrical structure connected to the chamber A80, and the cylindrical structure serves as the exhaust port of the oil return isolation plate 50, and the exhaust port is connected to the upper interior of the shell. The oil return channel A101 is opened on the lower inner wall of the oil return isolation plate 50 below the cylindrical structure. The oil return channel A101 is composed of a connected inclined channel and a horizontal channel, and is opened along the circumference of the oil return isolation plate 50. The oil filter channel A91 is opened on the inner wall of the cylindrical structure, and the oil filter channel A91 is connected to the oil return channel A101 and is located above the oil return channel A101. The oil filter channel A91 is a multi-turn spiral channel structure opened along the circumferential inner wall of the cylindrical structure.

[0041] The compressor has a large oil return volume. The gaseous refrigerant discharged from the exhaust valve enters the fixed chamber A80 through the exhaust hole, reaches the first-level oil filtration through the cyclonic oil filter channel B92, and the oil after oil and gas separation returns to the narrow channel below the return oil isolation plate 50 and between the high and low pressure partitions 70 through the return oil channel B102. The gaseous refrigerant after oil and gas separation passes through the space (gap) above the auxiliary isolation plate 60 and mixes with the refrigerant directly discharged from part of the exhaust valve, enters the secondary oil filtration area, passes through the cyclonic oil filter channel A91 for secondary oil filtration and returns oil through the return oil channel A101, and finally the gaseous refrigerant is discharged through the return oil isolation plate 50. The separated refrigeration oil smoothly returns to the compressor oil pool through the return oil channel C103 through the high and low pressure differential, which can effectively control the entry of refrigeration oil into the refrigeration system, solves the compressor oil return problem, and improves the heat exchange efficiency of the system.

[0042] The exhaust valve composed of the exhaust valve plate 30 and the exhaust valve plate limiting structure 40 has an exhaust direction which is in the same direction as the notch of the auxiliary isolation plate 60, and is introduced into the oil filter channel through the notch.

[0043] The spiral extension direction of the oil filter baffle (return oil isolation plate 50) is the same as the direction of the gaseous refrigerant. The entry direction is not fixed, and the spiral angle is adjusted according to the oil content. After oil filtration, the direction of the gaseous refrigerant discharge channel is the same as the oil filter spiral direction.

[0044] The oil return passage provided below the oil filter spiral of the oil filter partition (oil return isolation plate 50) can be used together with the multi-stage oil filter or separately.

[0045] The oil return channel C103 is set on the high and low pressure partition 70. The size of the channel is determined according to the oil circulation volume of the compressor, and the oil return is completed through the high and low pressure difference. The setting of the oil storage channel above the channel is related to the lowest refrigerant circulation condition of the compressor and the compressor frequency.

[0046] In the present invention, the high-oil and high-pressure gas compressed by the vortex passes through the valve plate 30 and is discharged in the direction specified by the limit plate (valve plate limit structure 40). The gas flows directly to the chamber A80 through the gap of the auxiliary isolation plate 60. The gas in the chamber A80 passes through the multi-stage spiral oil filter channel on the return oil isolation plate 50 to separate the oil and the gaseous refrigerant. The gaseous refrigerant is discharged through the exhaust port of the return oil isolation plate 50. The separated refrigerant oil flows to the bottom of the chamber A80 through the return oil channel on the return oil isolation plate 50, and then under the action of the pressure difference, the oil flows from the high pressure of the high and low pressure partition plates 70 to the low pressure chamber, completing the oil return process. In this way, the compressor that improves efficiency and reliability through high oil circulation can effectively solve the problem of poor oil return.

[0047] Example 2

[0048] like Figure 2 As shown, a scroll compressor with a self-return oil structure includes: a housing and a fixed scroll component 10, a movable scroll component 20, a valve plate 30, a valve plate limiting structure 40, an oil return isolation plate 50, and a high-low pressure isolation plate 70 arranged inside the housing. The movable scroll component 20 is connected to the lower end of the fixed scroll component 10 to form a low-pressure chamber and a high-pressure chamber. The high-low pressure isolation plate 70 is installed on the housing and sealed at the upper end of the fixed scroll component 10. The oil return isolation plate 50 is arranged at the upper end of the high-low pressure isolation plate 70, and a chamber A80 is formed between the oil return isolation plate 50 and the high-low pressure isolation plate 70. The exhaust valve is installed at the upper end of the fixed scroll component 10 and is located in the chamber A80. The fixed scroll component 10 is provided with an exhaust hole, one end of the exhaust hole is connected to the high-pressure chamber, and the other end is connected to the chamber A80 through the exhaust valve. There are two groups of oil return structures. The valve plate 30 is arranged at the top of the exhaust hole, and the valve plate limiting structure 40 is installed at the upper end of the fixed scroll component 10 to limit the valve plate 30. The valve plate limiting structure 40 adopts a limiting plate.

[0049] The oil return structure specifically includes an oil filter channel A91, an oil filter channel B92, an oil return channel A101, an oil return channel B102, and an oil return channel C103. The oil filter channel A91, the oil filter channel B92, the oil return channel A101, and the oil return channel B102 are provided on the oil return isolation plate 50, and the oil return channel C103 is provided on the high-low pressure isolation plate 70. In this embodiment, six oil return channels C103 are provided, which can be symmetrically arranged on the left and right sides of the high-low pressure isolation plate 70 along the circumferential direction.

[0050] The oil return channel B102 and the oil filter channel B92 are both opened on the oil return isolation plate 50 near the lower inner wall of the shell. The oil return channel B102 is an inclined structure and is opened along the circumference of the oil return isolation plate 50. The oil filter channel B92 is connected to the oil return channel B102 and is located obliquely above the oil return channel B102. The oil filter channel B92 is a multi-turn spiral channel structure opened along the circumferential side wall of the oil return isolation plate 50.

[0051] The middle part of the oil return isolation plate 50 is a cylindrical structure connected to the chamber A80, and the cylindrical structure serves as the exhaust port of the oil return isolation plate 50, and the exhaust port is connected to the upper interior of the shell. The oil return channel A101 is opened on the lower inner wall of the oil return isolation plate 50 below the cylindrical structure. The oil return channel A101 is composed of a connected inclined channel and a horizontal channel, and is opened along the circumference of the oil return isolation plate 50. The oil filter channel A91 is opened on the inner wall of the cylindrical structure, and the oil filter channel A91 is connected to the oil return channel A101 and is located above the oil return channel A101. The oil filter channel A91 is a multi-turn spiral channel structure opened along the circumferential inner wall of the cylindrical structure.

[0052] The compressor does not have a large oil return. The gaseous refrigerant discharged from the exhaust valve enters the fixed chamber A80 through the exhaust hole, reaches the first-level oil filtration through the cyclonic oil filter channel B92, and the oil after oil and gas separation returns to the narrow channel below the oil return isolation plate 50 and between the high and low pressure partitions through the oil return channel B102. The gaseous refrigerant after oil and gas separation directly enters the secondary oil filtration area, passes through the cyclonic oil filter channel A91 for secondary oil filtration and returns oil through the oil return channel A101, and finally the gaseous refrigerant is discharged through the oil return isolation plate 50. The separated refrigeration oil smoothly returns to the compressor oil pool through the oil return channel C103 through the high and low pressure differential, which can effectively control the refrigeration oil from entering the refrigeration system, solve the compressor oil return problem, and improve the heat exchange efficiency of the system.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scroll compressor with a self-oil return structure, characterized in that: include: A housing and a fixed scroll component (10), a movable scroll component (20), an exhaust valve, an oil return isolation plate (50) and a high-low pressure isolation plate (70) arranged inside the housing, wherein the movable scroll component (20) is connected to the lower end of the fixed scroll component (10) to form a low-pressure chamber and a high-pressure chamber; The high-low pressure isolation plate (70) is mounted on the housing and is sealed and connected to the upper end of the fixed scroll component (10); the oil return isolation plate (50) is arranged at the upper end of the high-low pressure isolation plate (70); a chamber A (80) is formed between the oil return isolation plate (50) and the high-low pressure isolation plate (70); the exhaust valve is mounted on the upper end of the fixed scroll component (10) and is located in the chamber A (80); an exhaust hole is opened on the fixed scroll component (10); one end of the exhaust hole is connected to the high pressure chamber, and the other end is connected to the chamber A (80) through the exhaust valve; The oil return isolation plate (50) and the high-low pressure isolation plate (70) are provided with an oil return structure connected to the chamber A (80), and the oil return structure is finally connected to the compressor oil pool through the high-low pressure isolation plate (70).

2. The scroll compressor with a self-oil return structure according to claim 1, characterized in that: The oil return structure comprises a first oil return structure and a second oil return structure, and the first oil return structure is provided with at least one group; The first oil return structure is an oil return channel opened on the oil return isolation plate (50), the middle part of the oil return isolation plate (50) is a cylindrical structure connected to the chamber A (80), and the oil return channel on the oil return isolation plate (50) is arranged on the lower inner wall of the oil return isolation plate (50) close to the shell and / or the lower inner wall of the oil return isolation plate (50) below the cylindrical structure; The second oil return structure is an oil return channel C (103) opened on the high-low pressure isolation plate (70) at a position close to the shell, and a plurality of the oil return channels C (103) are provided and distributed on both sides of the high-low pressure isolation plate (70).

3. The scroll compressor with a self-oil return structure according to claim 2, characterized in that: The oil return channel opened on the oil return isolation plate (50) close to the lower inner wall of the shell is the oil return channel B (102). The oil return channel B (102) is an inclined structure and opened along the circumference of the oil return isolation plate (50).

4. The scroll compressor with a self-oil return structure according to claim 3, characterized in that: An oil filter channel B (92) is also provided on the lower inner wall of the oil return isolation plate (50). The oil filter channel B (92) is connected to the oil return channel B (102) and is located obliquely above the oil return channel B (102).

5. The scroll compressor with a self-oil return structure according to claim 4, characterized in that: The oil filter channel B (92) is a multi-turn spiral channel structure opened along the circumferential side wall of the oil return isolation plate (50).

6. The scroll compressor with a self-oil return structure according to claim 2, characterized in that: The oil return channel opened on the lower inner wall of the oil return isolation plate (50) below the cylindrical structure is the oil return channel A (101). The oil return channel A (101) is composed of a connected inclined channel and a horizontal channel and is opened along the circumference of the oil return isolation plate (50).

7. The scroll compressor with a self-oil return structure according to claim 6, characterized in that: An oil filter channel A (91) is formed on the inner wall of the cylindrical structure. The oil filter channel A (91) is connected to the oil return channel A (101) and is located above the oil return channel A (101).

8. The scroll compressor with a self-oil return structure according to claim 7, characterized in that: The oil filter channel A (91) is a multi-turn spiral channel structure opened along the circumferential inner wall of the cylindrical structure.

9. The scroll compressor with a self-oil return structure according to claim 1, characterized in that: It also includes an auxiliary isolation plate (60) installed at the upper end of the high and low pressure isolation plate (70) and located in the chamber A (80), the auxiliary isolation plate (60) is in a cylindrical structure, and a notch is opened on one side wall, the notch communicates with the interior of the chamber A (80) and the auxiliary isolation plate (60), the exhaust hole is connected with the interior of the auxiliary isolation plate (60) and the chamber A (80) through an exhaust valve, and there is a gap between the upper part of the auxiliary isolation plate (60) and the return oil isolation plate (50).

10. The scroll compressor with a self-oil return structure according to claim 9, characterized in that: The exhaust valve comprises a valve plate (30) and a valve plate limiting structure (40), wherein the valve plate (30) is arranged at the top of the exhaust hole, and the valve plate limiting structure (40) is installed at the upper end of the fixed scroll component (10) for limiting the valve plate (30); the exhaust direction of the exhaust hole at the valve plate (30) is in the same direction as the notch of the auxiliary isolation plate (60), and the gaseous refrigerant is introduced into the oil return structure through the notch.

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