Pump body assembly, compressor and air conditioner with same

Abstract

The application provides a pump body assembly, a compressor and an air conditioner with the same. The pump body assembly comprises a compression structure and a force applying structure. The compression structure comprises a static vortex disc and a dynamic vortex disc which are engaged with each other. The force applying structure applies a pre-tightening force in a first direction to the dynamic vortex disc. The first direction is opposite to the rotating direction of the dynamic vortex disc. According to the pump body assembly, the compressor and the air conditioner with the same, the dynamic and static vortex discs can be more stable in radial action clearance, and the compressor has high volumetric efficiency in a full frequency range.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, specifically relating to a pump assembly, a compressor, and an air conditioner having the same. Background Technology

[0002] Currently, scroll compressors are widely used in automotive compressors due to their low internal leakage rate. In order to maintain a low internal leakage rate, the pin-type scroll compressors have generally introduced an eccentric sleeve mechanism with an eccentric mass block to radially compensate for the eccentricity of the pump body.

[0003] However, this eccentric sleeve mechanism uses the eccentric torque generated during the operation of the eccentric mass block to provide radial compensation torque for the moving scroll. When the compressor is running at low speed, the compensation torque is too small, and the radial leakage of the compressor is still too large, resulting in low volumetric efficiency of the compressor at low frequency operation.

[0004] Therefore, how to provide a pump assembly, compressor, and air conditioner that can make the radial action gap between the moving and stationary scroll plates more stable and have high volumetric efficiency across the entire frequency range has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide a pump body assembly, a compressor, and an air conditioner having the same, which can make the radial action gap between the moving and stationary scroll plates more stable and the compressor operating volumetric efficiency high across the entire frequency range.

[0006] To address the aforementioned problems, this application provides a pump body assembly, comprising:

[0007] The compression structure includes a stationary scroll and a moving scroll that mesh with each other.

[0008] The force-applying structure applies a preload force in a first direction to the moving scroll; the first direction is opposite to the rotation direction of the moving scroll.

[0009] Furthermore, the pump body assembly also includes a crankshaft, which includes an eccentric shaft capable of driving the rotating scroll to rotate; the force-applying structure is disposed on the crankshaft.

[0010] Furthermore, the pump body assembly also includes an eccentric sleeve, which is rotatably fitted onto the eccentric shaft and connected to the moving scroll. The force-applying structure applies a preload force in a first direction to the eccentric sleeve, thereby applying a preload force in a first direction to the moving scroll.

[0011] Furthermore, the force-applying structure includes an elastic structure that connects the crankshaft and the eccentric sleeve.

[0012] Furthermore, the elastic structure includes a spring structure, which is sleeved on the eccentric shaft and located inside the eccentric sleeve; one end of the spring structure is connected to the eccentric shaft, and the other end of the spring structure is connected to the eccentric sleeve.

[0013] Furthermore, a mounting groove is provided at the end of the eccentric shaft; the first end of the spring structure is fixed through the mounting groove;

[0014] And / or, the eccentric sleeve includes an annular structure, one end of which is provided with an end structure, and the end structure has an installation port, and the second end of the spring structure is fixed through the installation port.

[0015] Furthermore, the eccentric shaft is provided with a mounting surface facing the direction of the compression structure, and the spring structure is mounted on the mounting surface.

[0016] Furthermore, the number of spring structures is set to at least one; when the number of spring structures is set to two or more, the two or more spring structures are arranged sequentially in the axial direction of the eccentric shaft.

[0017] Furthermore, the spring structure includes a linear spring; or, the spring structure includes a leaf spring, wherein the leaf spring is rolled to form the leaf spring.

[0018] According to another aspect of this application, a compressor is provided, including a pump body assembly, the pump body assembly being the pump body assembly described above.

[0019] According to another aspect of this application, an air conditioner is provided, including a compressor, wherein the compressor is the compressor described above.

[0020] The pump assembly, compressor, and air conditioner provided in this application enable more stable radial clearance between the moving and stationary scroll plates, resulting in high volumetric efficiency of the compressor across the entire frequency range. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pump body assembly according to the first embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the installation structure of the pump body assembly according to the first embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the pump body assembly according to the first embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the eccentric sleeve according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the pump body assembly according to the second embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the installation structure of the pump body assembly according to the second embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the pump body assembly according to the second embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the force-applying structure according to the second embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the pump body assembly according to the third embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the installation structure of the pump body assembly according to the third embodiment of this application;

[0031] Figure 11 This is a schematic diagram of the installation structure between the force-applying structure and the eccentric shaft according to the third embodiment of this application;

[0032] Figure 12 This is a schematic diagram of the pump body assembly of a related technology.

[0033] The reference numerals in the attached figures are as follows:

[0034] 1. Compression structure; 2. Force-applying structure; 21. Anti-torsion part; 22. Extension part; 3. Crankshaft; 31. Eccentric shaft; 32. Mounting groove; 33. Mounting surface; 34. Mounting section; 35. Body section; 4. Eccentric sleeve; 41. Mounting port; 5. Bracket; 51. Receiving cavity; 52. Bracket bearing part. Detailed Implementation

[0035] See also Figure 1-12 As shown in the figure, this application discloses a pump body assembly, including a compression structure 1 and a force-applying structure 2. The compression structure 1 includes a stationary scroll and a moving scroll that mesh with each other. The force-applying structure 2 applies a preload force in a first direction to the moving scroll. The first direction is opposite to the rotation direction of the moving scroll. The preload force in this application can keep the radial clearance between the moving and stationary scrolls at the optimal compression position; reduce the weight and volume of the rotating mechanism, reduce non-compression power consumption, and improve the operating efficiency of the pre-compressor. The preload force mentioned in this application refers to the force that exists regardless of the position of the moving scroll, so that even when the compressor is running at low speed, it can still provide sufficient radial compensation torque and reduce the leakage rate inside the pump body. A preload force is preset on the moving scroll during installation; that is, after installation, regardless of whether the compressor is running, there is a pulling preload force on the moving scroll.

[0036] This application also discloses some embodiments, in which the pump body assembly further includes a crankshaft 3, the crankshaft 3 including an eccentric shaft 31, the eccentric shaft 31 being able to drive the rotating scroll to rotate; a force-applying structure 2 is disposed on the crankshaft 3. Since the force-applying structure 2 is disposed on the crankshaft 3, the force-applying structure 2 directly applies a preload force in the first direction to the scroll, thereby achieving radial compensation of the pump body eccentricity during low-speed operation of the compressor, maintaining the optimal radial clearance of the pump body during operation; reducing the weight and volume of the rotating mechanism, and improving the overall efficiency of the compressor.

[0037] This application also discloses some embodiments in which the pump body assembly further includes an eccentric sleeve 4, which is rotatably fitted onto the eccentric shaft 31 and connected to the moving scroll. The force-applying structure 2 applies a preload force in a first direction to the eccentric sleeve 4, thereby applying a preload force in the first direction to the moving scroll. The eccentric sleeve 4 is fitted onto the end of the eccentric shaft 31 near the compression structure 1. In this application, the eccentric sleeve 4 is merely a sleeve and does not include an eccentric mass block.

[0038] Combination Figure 12 It is known that in related technologies, the eccentric sleeve 4 used in scroll compressors adds an eccentric mass block. This eccentric radial compensation mechanism, the eccentric sleeve 4 includes a bearing part, i.e., a sleeve, and an eccentric mass block. The introduction of the eccentric mass block can, to a certain extent, offset the radial gas force between the moving and stationary scrolls during compressor operation, achieving stable contact between the moving and stationary scrolls during operation and reducing radial leakage. However, when the compressor is running at low speed, this structure fails to effectively improve efficiency because the eccentric mass block cannot provide sufficient compensation torque, resulting in a large radial clearance between the moving and stationary scrolls. Furthermore, the eccentric mass block is mounted on the rotating mechanism and rotates periodically with the operation of the rotating mechanism, increasing the non-compressor power during compressor operation and reducing compressor energy efficiency. Moreover, the eccentric mass block is installed inside the eccentric block receiving cavity 51 of the bracket 5, occupying a certain amount of compressor cavity volume. The bracket 5 also has a bracket bearing part 52, such as... Figure 12 As shown, the eccentric mass block scheme is adopted, and the height H of the receiving cavity 51 is relatively large, which increases the size and weight of the compressor.

[0039] In this application, see attached [document / reference] Figure 1 This application eliminates the eccentric mass block, allowing the scroll compressor to provide sufficient radial compensation torque even at low speeds, resulting in a more stable radial clearance between the moving and stationary scrolls and high volumetric efficiency across the entire frequency range. Furthermore, because the preload force enables radial compensation between the moving and stationary scrolls during scroll compressor operation, the height of the receiving cavity 51 is H′ (due to the elimination of the eccentric mass block 62). Figure 1 and Figure 12 The height H′ of the receiving cavity 51 is only 1 / 2 of that of the original scheme H, which reduces the internal volume of the eccentric block receiving cavity 51 of the support 5, effectively reduces the weight of the rotating mechanism, thereby reducing the non-compression power of the whole machine and reducing the overall size and weight of the machine.

[0040] This application solves the problem of increased compressor weight and volume caused by eccentric mass blocks by eliminating the eccentric mass block and using only preload for radial compensation of eccentricity.

[0041] This application also discloses some embodiments in which the force-applying structure 2 includes an elastic structure that connects the crankshaft 3 and the eccentric sleeve 4. The elastic force forms a preload.

[0042] This application also discloses some embodiments, in which the elastic structure includes a spring structure, which is sleeved on the eccentric shaft 31 and located inside the eccentric sleeve 4; one end of the spring structure is connected to the eccentric shaft 31, and the other end of the spring structure is connected to the eccentric sleeve 4. This fixing method has a simple structure. During installation, the spring has a preload on the moving plate; that is, after installation, regardless of whether the compressor is running, the spring has a pulling preload on the moving plate.

[0043] The preload torque acts counterclockwise. This torsional preload is transmitted to the moving scroll bearing, causing a certain torsional tendency in the moving scroll. This ensures that the moving scroll profile fits tightly against the stationary scroll profile. During compressor operation, the presence of this preload torque maintains the radial clearance between the moving and stationary scrolls at an optimal level, reducing radial leakage. In cases of abnormal operating conditions during compressor operation, or when liquid slugging or particulate impurities occur inside the pump body, the force exceeds the torsional spring preload. The moving scroll can rotate clockwise, effectively preventing damage to the moving and stationary scroll profiles caused by abnormal loads, liquid slugging, or particulate impurities during air intake. Furthermore, because this mechanism significantly reduces volume and weight compared to conventional solutions, it eliminates the power consumption introduced by the eccentric mass block, further increases the preload torque application area, and further improves the operational stability of the eccentric sleeve 4.

[0044] This application also discloses some embodiments in which an installation groove 32 is provided at the end of the eccentric shaft 31; the first end of the spring structure is fixed through the installation groove 32; the first end of the spring structure has an anti-torsion part 21 and the second end has an extension part 22; the anti-torsion part 21 is engaged in the installation groove 32, which is a strip-shaped groove opened on the end face of the eccentric shaft 31; both ends of the strip-shaped groove penetrate the eccentric shaft 31, the first end of the spring structure is engaged in the strip-shaped groove, and the spring structure is sleeved on the outside of the eccentric shaft 31, and the second end of the spring structure is connected to the eccentric sleeve 4. One end of the pre-acting spring is fixed to the installation groove 32 through the anti-torsion part 21, and the other end is fixed to the pre-acting hole, i.e., the installation port 41, opened in the eccentric sleeve 4 through the tail extension part 22. The spring structure is sleeved on the eccentric shaft 31 of the crankshaft 3, and a moving scroll bearing is installed on the outer circle of the eccentric sleeve 4. The moving scroll bearing is fixed on the moving scroll. After the spring is installed, it has a certain torsional preload, i.e., the preload force mentioned in this application. The spring structure is a ring structure, such as the common linear helical spring, and the leaf spring, which is a spring sheet rolled into a ring structure. All of these are ring structures and can be fitted onto the eccentric shaft 31 of the crankshaft 3.

[0045] See appendix for details. Figure 4 As can be seen, this application also discloses some embodiments. The eccentric sleeve 4 includes an annular structure. One end of the annular structure is provided with an end structure, and the end structure has a mounting port 41. The second end of the spring structure is fixed through the mounting port 41. The annular structure is a sleeve. One end of the sleeve has an end structure, and the other end is an opening. That is, the overall structure of the eccentric sleeve 4 is similar to a cover. The top of the cover has the mounting port 41. A circular hole is provided on the top of the cover, and the mounting port 41 extends outward in a straight line from the circular hole.

[0046] This application also discloses some embodiments in which an eccentric shaft 31 is provided with a mounting surface 33 facing the compression structure 1, and a spring structure is mounted on the mounting surface 33. (See also...) Figure 2 As shown, a stepped step is formed at the eccentric shaft 31 of the compressor crankshaft 3, and the step surface forms the mounting surface 33. A pre-action mounting groove 32 is formed at the top of the step. In the direction away from the compression structure 1, the eccentric shaft 31 includes a mounting section 34 and a body section 35 arranged in sequence. The diameter of the mounting section 34 is smaller than the diameter of the body section 35, and the stepped surface is formed at the connection position of the mounting section 34 and the body section 35.

[0047] See also Figure 9-11As shown, this application also discloses some embodiments in which the number of spring structures is set to at least one; when the number of spring structures is set to two or more, the two or more spring structures are arranged sequentially in the axial direction of the eccentric shaft 31. That is, in the third embodiment of this application, when the number of spring structures is set to at least two or more, no step is provided on the eccentric part of the crankshaft 3, and two or more spring structures are sequentially sleeved on the eccentric shaft 31. At this time, a mounting groove 32 is opened on the top of the eccentric shaft 31, and the first end of the spring closest to the moving scroll is fixed through the mounting groove 32, and the second end is fixed through the mounting port 41 on the eccentric sleeve 4. By fixing and pre-tightening the upper and lower ends of the eccentric sleeve 4, the pre-action point of the spring can be further increased, the running stability of the eccentric sleeve 4 can be improved, and the axial tilt of the eccentric sleeve 4 can be prevented.

[0048] This application also discloses some embodiments, in which the spring structure includes a linear spring; as shown in conjunction with 1-3, the linear spring is formed by bending a linear structure. One end of the spring is fixed to the mounting groove 32 by an anti-torsion fixation, and the other end is fixed to the pre-acting hole, i.e., the mounting opening 41, opened in the eccentric sleeve 4 by a tail extension 22. The middle acting part of the spring is fitted onto the eccentric shaft 31 of the crankshaft 3. A moving scroll bearing is installed on the outer circle of the eccentric sleeve 4. The moving scroll bearing is fixed on the moving scroll. After the spring is installed, it has a certain torsional preload, i.e., the preload force mentioned in this application.

[0049] This application also discloses some embodiments in which the spring structure includes a leaf-shaped annular spring, which is formed by rolling the leaf-shaped spring into a leaf-shaped annular spring. That is, the leaf-shaped structure is rolled into at least one layer; it is sleeved on the mounting section 34 as a whole, and one end of the spring is fixed to the mounting groove 32 by an anti-torsion fixation, and the other end is fixed to the pre-acting hole, i.e., the mounting opening 41, opened in the eccentric sleeve 4 by the tail extension 22. The middle acting part of the spring is sleeved on the eccentric shaft 31 of the crankshaft 3. A moving scroll bearing is installed on the outer circle of the eccentric sleeve 4, and the moving scroll bearing is fixed on the moving scroll. After the spring is installed, it has a certain torsional preload, i.e., the preload force mentioned in this application. Because the spring structure is a linear or leaf-shaped annular spring, both of which are structures that extend in the circumferential direction, it can effectively provide a circumferential preload force to the moving scroll of this application.

[0050] According to an embodiment of this application, a compressor is provided, including a pump body assembly, which is the pump body assembly described above.

[0051] According to an embodiment of this application, an air conditioner is provided, including a compressor, wherein the compressor is the compressor described above.

[0052] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A pump body assembly, characterized in that, include: Compression structure (1), the compression structure (1) includes a stationary volute and a moving volute that mesh with each other; The force-applying structure (2) applies a preload force in a first direction to the moving scroll plate; the first direction is opposite to the rotation direction of the moving scroll plate. The pump assembly further includes a crankshaft (3), which includes an eccentric shaft (31) capable of driving the moving scroll to rotate; the force-applying structure (2) is sleeved on the eccentric shaft (31); the pump assembly further includes an eccentric sleeve (4), which is rotatably sleeved on the eccentric shaft (31) and connected to the moving scroll; the force-applying structure (2) applies a preload force in a first direction to the eccentric sleeve (4), thereby applying a preload force in a first direction to the moving scroll; the force-applying structure (2) includes an elastic structure, which connects the eccentric shaft (31) and the eccentric sleeve (4); The preload force is used to make the moving scroll profile fit against the stationary scroll profile, thereby reducing radial leakage.

2. The pump body assembly according to claim 1, characterized in that, The elastic structure includes a spring structure, which is sleeved on the eccentric shaft (31) and located inside the eccentric sleeve (4); one end of the spring structure is connected to the eccentric shaft (31), and the other end of the spring structure is connected to the eccentric sleeve (4).

3. The pump body assembly according to claim 2, characterized in that, The end of the eccentric shaft (31) is provided with a mounting groove (32); the first end of the spring structure is fixed through the mounting groove (32); And / or, the eccentric sleeve (4) includes an annular structure, one end of which is provided with an end structure, and the end structure is provided with an installation port (41), and the second end of the spring structure is fixed through the installation port (41).

4. The pump body assembly according to claim 2, characterized in that, The eccentric shaft (31) is provided with a mounting surface (33) facing the compression structure (1), and the spring structure is mounted on the mounting surface (33).

5. The pump body assembly according to claim 2, characterized in that, The number of spring structures is set to at least one; when the number of spring structures is set to two or more, the two or more spring structures are arranged sequentially in the axial direction of the eccentric shaft (31).

6. The pump body assembly according to claim 2, characterized in that, The spring structure includes a linear spring; or, the spring structure includes a sheet-shaped annular spring, which is formed by rolling the sheet-shaped spring.

7. A compressor, comprising a pump body assembly, characterized in that, The pump assembly is the pump assembly according to any one of claims 1-6.

8. An air conditioner, comprising a compressor, characterized in that, The compressor is the compressor described in claim 7.

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