Compression structure, scroll compressor, air conditioner

Abstract

The present invention provides a compression structure, a scroll compressor, and an air conditioner, wherein the compression structure includes: a fixed scroll having a fixed scroll tooth, a notch is configured at the tooth top of the fixed scroll tooth, and the notch forms an air suction groove; a movable scroll includes a base plate, and the end surface of the base plate facing the fixed scroll is a first side surface; when the movable scroll rotates relative to the fixed scroll to compress the gas, the first side surface has a first area that is not rubbed by the tooth top of the fixed scroll tooth and corresponds to the air suction groove; a groove is configured on the base plate, and the first area is located in the area where the notch of the groove is located. According to the present invention, during the long-term operation of the compressor, even if the movable scroll overturns under the vibration force or external force when the compressor is working, due to the existence of the groove, the first area on the base plate of the movable scroll will not interfere with the scroll tooth of the fixed scroll, thereby improving the wear of the compressor pump body, so that the operating reliability of the compressor is greatly guaranteed and improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a compression structure, a scroll compressor and an air conditioner. Background Art

[0002] During the operation of the scroll compressor, the movable scroll and the stationary scroll mesh with each other in the radial direction. In the axial direction, the top of the movable scroll tooth of the movable scroll periodically passes over the base plate of the stationary scroll. Similarly, the top of the static scroll tooth of the stationary scroll will also periodically pass over the base plate of the movable scroll. At the same time, according to the design requirements, an air suction groove will be opened on the stationary scroll corresponding to the suction port of the compressor to introduce the gaseous refrigerant into the crescent-shaped closed cavity formed by the movable and stationary scrolls to achieve the compression process. Due to the existence of the suction groove of the stationary scroll and the large groove width h of the suction groove (h>2R, R is the rotation radius of the movable scroll), the part of the section where the suction groove is opened at the top of the tooth of the stationary scroll will not contact the base plate of the movable scroll. When the movable scroll rotates relative to the stationary scroll to compress the refrigerant, there will be an area on the base plate of the movable scroll that is within the motion trajectory of the top of the tooth of the stationary scroll tooth but has not been rubbed by the top of the tooth of the stationary scroll tooth. During the long-term operation of the scroll compressor, the area of ​​the orbiting scroll base plate that was rubbed by the tooth tops of the stationary scroll teeth will gradually sink, while the area that is not rubbed within the movement trajectory of the tooth tops of the stationary scroll teeth will bulge relative to the sunken area. When the orbiting scroll overturns due to the vibration force or external force during the operation of the compressor, the bulge will seriously interfere with the stationary scroll teeth, which will accelerate the wear of the pump body and seriously affect the operating reliability of the compressor. Summary of the invention

[0003] Therefore, the present invention provides a compression structure that can overcome the problem that during the long-term operation of the scroll compressor, when the movable scroll is overturned due to the vibration force or external force when the compressor is working, the base plate of the movable scroll is within the movement trajectory of the tooth top of the stationary scroll tooth of the stationary scroll, and the area not rubbed by the tooth top of the stationary scroll tooth will seriously interfere with the stationary scroll tooth, thereby accelerating the wear of the compressor pump body and seriously affecting the operating reliability of the compressor.

[0004] In order to solve the above problems, the present invention provides a compression structure, including: a movable scroll and a fixed scroll matched with the movable scroll, the fixed scroll having a fixed scroll tooth, a notch is constructed at the tooth top of the fixed scroll tooth, the notch forms an air suction groove, the movable scroll includes a substrate, the end surface of the substrate facing the fixed scroll is a first side surface, when the movable scroll rotates relative to the fixed scroll to compress gas, the first side surface has a first area which is not rubbed by the tooth top of the fixed scroll tooth and corresponds to the air suction groove, the substrate is constructed with a groove, and the first area is located in the area where the notch of the groove is located.

[0005] In some embodiments, the first area has a first contour line on the first side, the notch of the groove has a second contour line on the first side, the first contour line is within the second contour line, the distance between the first contour line and the second contour line is L, and 1mm≤L≤3mm.

[0006] In some embodiments, in a direction from the notch of the groove to the groove bottom of the groove, the cross-sectional area of ​​the groove remains constant or the cross-sectional area gradually increases.

[0007] In some embodiments, the cross section of the groove is rectangular, elliptical, or parallelogram.

[0008] In some embodiments, an oil inlet hole is configured on the substrate, and the oil inlet hole is communicated with the groove.

[0009] In some embodiments, the substrate includes a first plate body and a second plate body, the first plate body and the second plate body are stacked together, and the groove is configured on the first plate body and runs through the axial direction of the first plate body.

[0010] In some embodiments, the oil inlet hole is disposed on the first plate body, and a sealing member is disposed between the first plate body and the second plate body.

[0011] In some embodiments, a protrusion is provided on the first plate body, a through groove penetrating the seal is configured on the seal, and a mounting groove is further configured on the second plate body, and the protrusion penetrates the through groove and is inserted into the mounting groove.

[0012] The present invention also provides a scroll compressor, comprising the above-mentioned compression structure.

[0013] The present invention also provides an air conditioner, comprising the scroll compressor.

[0014] The present invention provides a compression structure, a scroll compressor, and an air conditioner. A groove is constructed on a substrate of a movable scroll, and a first area is located in the area where the notch of the groove is located. During the long-term operation of the compressor, even if the movable scroll is overturned due to the vibration force or external force when the compressor is working, due to the existence of the groove, the first area on the substrate of the movable scroll will not interfere with the vortex tooth top of the fixed scroll, thereby improving the wear of the compressor pump body and greatly ensuring and improving the operating reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a movable scroll type 1 of a compression structure according to an embodiment of the present invention;

[0016] Figure 2A schematic structural diagram of a movable scroll type 2 of a compression structure according to an embodiment of the present invention;

[0017] Figure 3 A schematic structural diagram of a movable scroll type 3 of a compression structure according to an embodiment of the present invention;

[0018] Figure 4 A structural schematic diagram of a movable scroll type 4 of a compression structure according to an embodiment of the present invention;

[0019] Figure 5 A schematic diagram of a first area on a movable scroll of a compression structure according to an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of the oil inlet hole and the groove on the movable scroll of the compression structure according to an embodiment of the present invention being connected;

[0021] Figure 7 It is a structural schematic diagram of a compression structure of an embodiment of the present invention;

[0022] Figure 8 A top view of a second plate body of a movable scroll of a compression structure according to an embodiment of the present invention;

[0023] Fig. 9 A top view of a seal of a movable scroll of a compression structure according to an embodiment of the present invention;

[0024] Fig.10 A top view of a first plate body of a movable scroll of a compression structure according to an embodiment of the present invention;

[0025] Fig.11 A bottom view of a first plate body of a movable scroll of a compression structure according to an embodiment of the present invention;

[0026] Fig.12 A schematic structural diagram of a stationary scroll of a compression structure according to an embodiment of the present invention;

[0027] Fig.13 It is a schematic structural diagram of a scroll compressor according to an embodiment of the present invention.

[0028] The reference numerals are:

[0029] 1. movable scroll; 11. base plate; 111. first plate body; 112. second plate body; 113. seal; 2. fixed scroll; 3. first area; 4. groove; 5. oil inlet hole; 6. protrusion; 7. through groove; 8. mounting groove; 10. housing; 12. upper bracket; 13. stator; 14. crankshaft; 15. lower bracket; 16. lower cover; 17. cross slip ring; 18. upper cover. DETAILED DESCRIPTION

[0030] See also Figures 1 to 13As shown, according to an embodiment of the present invention, a compression structure is provided, comprising: an orbiting scroll 1 and a fixed scroll 2 matched with the orbiting scroll 1, the fixed scroll 2 having a fixed scroll tooth, a notch is configured at the tooth top of the fixed scroll tooth, and the notch forms an air suction groove, the orbiting scroll 1 comprises a substrate 11, the end surface of the substrate 11 facing the fixed scroll 2 is a first side surface, when the orbiting scroll 1 rotates relative to the fixed scroll 2 to compress the gas, the first side surface has a first area 3 which is not rubbed by the tooth top of the fixed scroll tooth and corresponds to the air suction groove, and a groove 4 is configured on the substrate 11, and the first area 3 is located in the area where the notch of the groove 4 is located. In this technical solution, the end of the fixed scroll tooth in contact with the substrate 11 of the orbiting scroll 1 is the tooth top of the fixed scroll tooth, and the first area 3 is a region on the substrate 11 of the orbiting scroll 1 which is in the motion trajectory of the vortex tooth top of the fixed scroll 2 but has not been rubbed by the vortex tooth top of the fixed scroll 2 because the air suction groove is configured on the vortex tooth of the fixed scroll 2. By constructing the groove 4 on the base plate 11 of the movable scroll 1 and making the first area 3 located in the area where the notch of the groove 4 is located, during the long-term operation of the compressor, even if the movable scroll 1 is overturned due to the vibration force or external force when the compressor is working, due to the existence of the groove 4, the first area 3 on the base plate 11 of the movable scroll 1 will not interfere with the vortex teeth of the fixed scroll 2, thereby improving the wear of the compressor pump body and greatly ensuring and improving the operating reliability of the compressor.

[0031] like Fig.13 As shown, the scroll compressor is mainly composed of a cross slip ring 17, a lower bracket 15, a movable scroll 1, a housing 10, a fixed scroll 2, an upper bracket 12, a motor, a crankshaft 14, a cross slip ring 17, etc. The motor is fixed to the housing 10 by cold pressing or shrink fitting, and the upper bracket 12 is connected to the housing 10 by welding. The fixed scroll 2 and the movable scroll 1 have a phase angle difference of 180 degrees and are installed oppositely on the upper bracket 12. Under the driving action of the crankshaft 14, the movable scroll 1 meshes with the fixed scroll 2 to form a series of crescent-shaped closed cavities that are isolated from each other and have gradually changing volumes. At the same time, the movable scroll 1 has axial flexibility, that is, there is an intermediate pressure back pressure cavity between the suction pressure and the exhaust pressure between the movable scroll 1 and the upper bracket 12, which can float the movable scroll 1 in the axial direction to fit the fixed scroll 2 during the operation of the compressor to ensure the axial seal between the movable and fixed scrolls.

[0032] When the compressor is running, the motor drives the crankshaft 14 to rotate. The top of the crankshaft 14 has an eccentric crank section at the contact point with the movable scroll 1. The eccentric crank section drives the movable scroll 1 to perform eccentric operation with a fixed rotation radius, and under the anti-rotation effect of the cross slip ring 17, the actual running path of the movable scroll 1 is a gyratory translation. The refrigerant entering from the outside of the compressor is sucked into the crescent-shaped suction cavity formed by the fixed scroll 2 and the movable scroll 1, and then discharged from the exhaust port of the fixed scroll 2 into the closed cavity formed by the upper cover 18, the shell 10 and the lower cover 16, and then discharged from the compressor through the exhaust copper pipe on the shell 10.

[0033] Fig.12 It is a schematic diagram of the structure of the static scroll 2. In the figure, h refers to the width of the suction groove of the static scroll 2. The area marked with h is the area where the suction groove is located.

[0034] Specifically, the first area 3 has a first contour line on the first side, the notch of the groove 4 has a second contour line on the first side, the first contour line is within the second contour line, and the distance between the first contour line and the second contour line is L, 1mm≤L≤3mm.

[0035] In this embodiment, when the movable scroll 1 overturns in a small range during the long-term operation of the compressor, the position of the friction area on the base plate 11 of the movable scroll 1 corresponding to the tooth top of the fixed scroll tooth will undergo a small displacement, so that the position of the first area 3 will also undergo a small displacement. Therefore, the area of ​​the notch of the groove 4 should be slightly larger than the area of ​​the first area 3, so that there will be a certain safety buffer distance to ensure that the first area 3 will not be transferred outside the notch of the groove 4.

[0036] As a specific implementation, the cross-sectional area of ​​the groove 4 is kept constant or gradually increases in the direction from the notch of the groove 4 to the groove bottom of the groove 4. If the cross-sectional area of ​​the groove 4 is gradually reduced in the direction from the notch of the groove 4 to the groove bottom of the groove 4, after the compressor has been running for a long time, as the spiral tooth top of the fixed scroll 2 rubs against the base plate 11 of the movable scroll 1, a convex ridge will appear between the rubbed area and the notch of the groove 4, so when the movable scroll 1 overturns, interference will still occur between the movable scroll 1 and the fixed scroll 2, so the cross-sectional area of ​​the groove 4 is kept constant or gradually increases in the direction from the notch of the groove 4 to the groove bottom of the groove 4.

[0037] Preferably, the cross section of the groove 4 is rectangular, elliptical or parallelogram. Figure 5 The area enclosed by the shaded portion is the first area 3, and the end of the volute of the movable scroll 1 is located in the first area 3. Figures 1 to 4 As shown, when the groove 4 is constructed, the groove 4 is connected to the end of the volute of the movable scroll 1, and a portion of the groove 4 surrounds the end of the volute of the movable scroll 1. When the cross section of the groove 4 is a regular shape such as a rectangle, an ellipse or a parallelogram, the processing of the groove 4 can be more convenient. Figure 2 The cross section of the groove 4 is shown to be rectangular, wherein each corner of the rectangle is rounded to prevent stress concentration; Figure 1 As shown, when the cross section of the groove 4 is a rectangle, the end of the volute of the rectangle away from the movable scroll 1 is a semicircle, and the other two corners of the rectangle are arc-shaped; Figure 3 The cross section of the groove 4 is shown to be an ellipse; Figure 4As shown, the cross section of the groove 4 is a parallelogram, and each corner of the parallelogram is rounded.

[0038] See also Figure 6 and Figure 7 As shown, the base plate 11 is provided with an oil inlet hole 5, which is connected to the groove 4. Lubricating oil can be delivered to the oil inlet hole 5, so that the lubricating oil enters the groove 4 from the oil inlet hole 5, and then enters the working area between the movable scroll 1 and the fixed scroll 2 from the groove 4 to lubricate the movable scroll 1 and the fixed scroll 2.

[0039] Specifically, the substrate 11 includes a first plate body 111 and a second plate body 112, which are stacked together, and the groove 4 is constructed on the first plate body 111 and passes through the axial direction of the first plate body 111. Compared with the substrate 11 being a whole, the substrate 11 is excavated inwardly on the substrate 11 to construct the groove 4, the substrate 11 is divided into the first plate body 111 and the second plate body 112, and a through groove passing through the first plate body 111 is constructed on the first plate body 111 to form the groove 4, so that the processing of the groove 4 is more convenient. After the groove 4 is constructed on the first plate body 111, the first plate body 111 and the second plate body 112 are stacked together.

[0040] See also Figures 8 to 11 As shown, the oil inlet hole 5 is arranged on the first plate body 111, and a seal 113 is arranged between the first plate body 111 and the second plate body 112. After the groove 4 is constructed on the first plate body 111, the oil inlet hole 5 also needs to be constructed on the first plate body 111, and the oil inlet hole 5 and the groove 4 are connected. After the lubricating oil enters the groove 4 from the oil inlet hole 5, in order to prevent the lubricating oil from leaking out from the gap between the first plate body 111 and the second plate body 112, a seal 113 is also arranged between the first plate body 111 and the second plate body 112. At the same time, the seal 113 can also prevent the refrigerant from leaking from the gap between the first plate body 111 and the second plate body 112 through the groove 4. Preferably, the seal 113 is a flexible gasket.

[0041] As a specific implementation, a protrusion 6 is provided on the first plate body 111 , a through groove 7 penetrating the seal 113 is constructed on the seal 113 , and a mounting groove 8 is further constructed on the second plate body 112 , and the protrusion 6 penetrates the through groove 7 and is inserted into the mounting groove 8 .

[0042] In this embodiment, the spiral tooth of the movable scroll 1 is arranged on the second plate 112, and the seal 113 and the first plate 111 are respectively constructed with a spiral groove that allows the spiral tooth to pass through. The process of assembling the seal 113 and the first plate 111 to the second plate 112 is: sequentially sleeve the seal 113 and the first plate 111 on the spiral tooth, and then press the first plate 111 downward, so that the first plate 111 drives the seal 113 to move downward until the protrusion 6 on the first plate 111 passes through the through groove 7 of the seal 113 and is stuck in the installation groove 8 of the second plate 112, and then the assembly of the movable scroll 1 is completed. Among them, the number of protrusions 6, through grooves 7 and installation grooves 8 is three, and their positions correspond to each other and are evenly distributed along their respective carriers, so that the second plate 112 can be assembled on the first plate 111 more firmly.

[0043] The present invention also provides a scroll compressor, comprising the above-mentioned compression structure.

[0044] The present invention also provides an air conditioner, comprising the scroll compressor.

[0045] It is easy for those skilled in the art to understand that the above-mentioned advantageous methods can be freely combined and superimposed without conflict.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compression structure, characterized in that: The invention comprises a movable scroll (1) and a fixed scroll (2) matched with the movable scroll (1), wherein the fixed scroll (2) has a fixed scroll tooth, and a notch is configured at the tooth top of the fixed scroll tooth, wherein the notch forms an air suction groove. The movable scroll (1) comprises a base plate (11), and the end surface of the base plate (11) facing the fixed scroll (2) is a first side surface. When the movable scroll (1) rotates relative to the fixed scroll (2) to compress gas, the first side surface has a first area (3) which is not rubbed by the tooth top of the fixed scroll tooth and corresponds to the air suction groove. The base plate (11) is configured with a groove (4), and the first area (3) is located in the area where the notch of the groove (4) is located. The first area (3) has a first contour line on the first side surface, the notch of the groove (4) has a second contour line on the first side surface, the first contour line is within the second contour line, and the distance between the first contour line and the second contour line is L, 1 mm ≤ L ≤ 3 mm; An oil inlet hole (5) is formed on the base plate (11), and the oil inlet hole (5) is communicated with the groove (4).

2. The compression structure according to claim 1, characterized in that: In the direction from the notch of the groove (4) to the groove bottom of the groove (4), the cross-sectional area of ​​the groove (4) remains constant or the cross-sectional area gradually increases.

3. The compression structure according to claim 1, characterized in that: The cross section of the groove (4) is rectangular, elliptical or parallelogram.

4. The compression structure according to claim 1, characterized in that: The base plate (11) comprises a first plate body (111) and a second plate body (112); the first plate body (111) and the second plate body (112) are stacked together; the groove (4) is constructed on the first plate body (111) and runs through the axial direction of the first plate body (111).

5. The compression structure according to claim 4, characterized in that: The oil inlet hole (5) is arranged on the first plate body (111), and a sealing member (113) is arranged between the first plate body (111) and the second plate body (112).

6. The compression structure according to claim 5, characterized in that: The first plate body (111) is provided with a protrusion (6), the sealing member (113) is provided with a through groove (7) penetrating the sealing member (113), and the second plate body (112) is also provided with a mounting groove (8), the protrusion (6) penetrating the through groove (7) and being inserted into the mounting groove (8).

7. A scroll compressor, characterized in that: A compression structure comprising the compression structure of any one of claims 1 to 6.

8. An air conditioner, characterized in that: Includes the scroll compressor as described in claim 7.

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