Scroll structure of scroll compressor

Abstract

The utility model relates to a scroll structure of scroll compressor belongs to compressor technical field. The utility model solves the problem that the size of the end plate of the revolving scroll part and the end plate of the fixed scroll part is too large, leading to poor economy. The scroll structure includes a movable scroll and a fixed scroll, the distance from the center of the fixed scroll back plate to the outer circumferential part of the front end of the fixed scroll blade is R, the radius of the movable scroll back plate is Do, the thickness of the movable scroll blade wall is w, when the center of the fixed scroll back plate and the center of the movable scroll back plate project in the vertical direction with a distance e when the scroll structure is engaged, the relationship 0 <= R + e - Do < w is met. According to such a structural relationship, the size of the movable scroll back plate and the fixed scroll back plate can be reduced, the space limitation of the scroll structure is reduced, flexibility is improved, material cost is saved, the economy of the design structure of the movable scroll is improved, and the demand for scroll compressor refrigerant can also be met.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a scroll structure for a scroll compressor. Background Technology

[0002] Existing hermetic scroll compressors have a partition plate in the pressure vessel, and a low-pressure chamber separated by the partition plate houses a stationary scroll, a moving scroll, and an electric actuator that drives the moving scroll. A compression chamber is formed by the meshing of the stationary and moving scroll blades. The refrigerant is compressed in the compression chamber and finally discharged into the high-pressure chamber through the exhaust port at the center of the stationary scroll. Because the stationary and moving scrolls are located on the low-pressure side, they generate a force that separates them during operation. To ensure the airtightness of the compression chamber, it is preferable to apply back pressure to either the moving or stationary scroll, causing their tooth tips to seal and improving compression efficiency.

[0003] Another patent document, 201780045456.1, proposes that the distance from the center of the end plate of the fixed scroll component to the outer periphery of the front end of the scroll tooth in the fixed scroll component is R; the distance from the center of the end plate of the rotating scroll component to the bottom surface of the rotating scroll tooth in the rotating scroll component, and the portion opposite to the outer periphery of the front end of the scroll tooth in the fixed scroll component, is Do; the radius of rotation of the distance between the center of the deflection shaft and the center of the drive shaft is e, satisfying R+e≤Do, and the outer periphery of the front end of the fixed scroll tooth contacts the end plate of the rotating scroll component and extends from the end face of the end plate of the fixed scroll component. When this patented structure satisfies R+e≤Do, the dimensions of both the end plate of the rotating scroll component and the end plate of the fixed scroll component are too large, resulting in poor economic efficiency. Utility Model Content

[0004] The present invention aims to solve the above-mentioned problems and thereby provide a scroll structure for a scroll compressor.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a scroll structure of a scroll compressor, the scroll structure including a moving scroll and a fixed scroll, the moving scroll including moving scroll blades and a moving scroll back plate, the moving scroll blades being fixedly connected to the moving scroll back plate, the fixed scroll including fixed scroll blades and a fixed scroll back plate, the fixed scroll blades being fixedly connected to the fixed scroll back plate, the moving scroll and the fixed scroll arranged vertically opposite each other, the moving scroll blades and the fixed scroll blades meshing with each other to form a compression cavity, let R be the distance from the center of the fixed scroll back plate to the outer periphery of the front end of the fixed scroll blade, let Do be the radius of the moving scroll back plate, let w be the wall thickness of the moving scroll blade, when the scroll structure meshes, the vertical projection distance between the center of the fixed scroll back plate and the center of the moving scroll back plate is e, satisfying the relationship 0≤R+e-Do<w.

[0006] Furthermore, the vortex structure also includes a cross ring, which is connected to the bottom of the moving vortex.

[0007] Compared with the prior art, the present invention has the following advantages: This utility model provides a scroll structure for a scroll compressor. By defining the distance from the center of the fixed scroll back plate to the outer periphery of the front end of the fixed scroll blade, the radius of the moving scroll back plate, the wall thickness of the moving scroll blade, and the vertical projection distance between the center of the fixed scroll back plate and the center of the moving scroll back plate when the scroll structure is engaged, the relationship 0 ≤ R + e - Do < w can be satisfied. Based on this structural relationship, the dimensions of the moving scroll back plate and the fixed scroll back plate can be reduced, which reduces the space constraints of the scroll structure, improves flexibility, saves material costs, improves the economic efficiency of the moving scroll design, and also meets the requirements of scroll compression refrigerant. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the vortex structure in this utility model; Figure 2 This is a schematic diagram of the connection structure between the high and low voltage isolation component and the fixed vortex in this utility model; Figure 3 This is a cross-sectional view of the meshing of the fixed vortex blade and the moving vortex blade in this utility model; Figure 4 This is a schematic diagram of the fixed vortex structure in this utility model; Figure 5 This is a schematic diagram showing the dimensions of the vortex structure in this utility model; Figure 6 This is a schematic diagram showing the dimensions from the center of the fixed vortex backplate to the outer periphery of the front end of the fixed vortex blade in this utility model; Figure 7 This is a schematic diagram showing the radius dimensions of the moving vortex backplate in this utility model.

[0010] In the diagram: 1. Moving vortex; 1-1. Moving vortex blade; 1-2. Moving vortex backplate; 2. Fixed vortex; 2-1. Fixed vortex blade; 2-2. Fixed vortex backplate; 3. Compression chamber; 4. High and low pressure isolation assembly; 5. Housing; 6. Main support component; 7. Upper cover; 8. Lower cover; 10. Cross ring. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0012] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0013] See appendix Figure 1-7 This embodiment describes a scroll structure for a scroll compressor. The scroll structure includes a moving scroll 1 and a fixed scroll 2. The moving scroll 1 includes moving scroll blades 1-1 and a moving scroll back plate 1-2, with the moving scroll blades 1-1 and the moving scroll back plate 1-2 fixedly connected. The fixed scroll 2 includes fixed scroll blades 2-1 and a fixed scroll back plate 2-2, with the fixed scroll blades 2-1 and the fixed scroll back plate 2-2 fixedly connected. The moving scroll 1 and the fixed scroll 2 are arranged vertically opposite to each other. Rotary scroll blade 1-1 and fixed scroll blade 2-1 mesh with each other to form a compression chamber 3. Let R be the distance from the center of the fixed scroll back plate 2-2 to the outer periphery of the front end of the fixed scroll blade 2-1, let Do be the radius of the moving scroll back plate 1-2, and let w be the wall thickness of the moving scroll blade 1-1. When the scroll structure is meshed, the vertical projection distance between the center of the fixed scroll back plate 2-2 and the center of the moving scroll back plate 1-2 is e, satisfying the relationship 0 ≤ R + e - Do < w. Specifically, the scroll compressor also includes an upper cover 7, a lower cover 8, a housing 5, a high-low pressure isolation assembly 4, and a main support component 6. The connection method and positional relationship between the scroll structure and the upper cover 7, lower cover 8, housing 5, high-low pressure isolation assembly 4, and main support component 6 are existing technologies and will not be elaborated here.

[0014] Designing the dimensions of the vortex structure to satisfy the relationship 0≤R+e-Do<w can reduce the dimensions of the moving vortex back plate 1-2 and the fixed vortex back plate 2-2, thereby reducing the space constraints of the vortex structure, improving flexibility, saving material costs, improving the economic efficiency of the design structure of the moving vortex 1, and also meeting the requirements of vortex compression refrigerant.

[0015] The vortex structure also includes a cross ring 10, which is connected to the bottom of the moving vortex 1. By setting the cross ring 10 at the bottom of the moving vortex 1, the rotation of the moving vortex 1 can be effectively prevented. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A scroll structure for a scroll compressor, the scroll structure comprising a moving scroll (1) and a fixed scroll (2), the moving scroll (1) comprising moving scroll blades (1-1) and a moving scroll back plate (1-2), the moving scroll blades (1-1) being fixedly connected to the moving scroll back plate (1-2), the fixed scroll (2) comprising fixed scroll blades (2-1) and a fixed scroll back plate (2-2), the fixed scroll blades (2-1) being fixedly connected to the fixed scroll back plate (2-2), the moving scroll (1) and the fixed scroll (2) being arranged vertically opposite each other, the moving scroll blades (1-1) and the fixed scroll blades (2-1) meshing with each other to form a compression chamber (3), characterized in that: Let R be the distance from the center of the fixed vortex back plate (2-2) to the outer periphery of the front end of the fixed vortex blade (2-1), Do be the radius of the moving vortex back plate (1-2), and w be the wall thickness of the moving vortex blade (1-1). When the vortex structure is engaged, the vertical projection distance between the center of the fixed vortex back plate (2-2) and the center of the moving vortex back plate (1-2) is e, satisfying the relationship 0≤R+e-Do<w.

2. The scroll structure of a scroll compressor according to claim 1, characterized in that: The vortex structure also includes a cross ring (10), which is connected to the bottom of the moving vortex (1).

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