A balance block structure for a scroll compressor and a scroll compressor
By designing a balance block structure that combines hollow and solid parts in the scroll compressor, the problem of insufficient strength of the balance block cover at high speeds is solved, thereby reducing airflow disturbance and noise, and improving the reliability and insulation performance of the compressor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JOHNSON CONTROLS HITACHI WANBAO COMPRESSOR GUANGZHOU CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
In existing scroll compressors, the balance block cover is not strong enough at high speeds, which leads to increased airflow resistance and noise, as well as increased compressor power consumption. At the same time, the increased thickness reduces the insulation distance.
A balance block structure for a scroll compressor is designed, which combines hollow and solid parts to form a complete annular curved surface, eliminating the need for a balance block cover. The hollow and solid parts are located on both sides of the balance block body to balance the inertial torque and improve the structural strength.
It effectively reduces airflow disturbance and noise, improves compressor reliability and insulation distance, and is suitable for high-speed and large-displacement compressors.
Smart Images
Figure CN224453084U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of scroll compressor technology, and in particular to a balance block structure for a scroll compressor and a scroll compressor. Background Technology
[0002] Because scroll compressors contain a moving scroll plate and an eccentric shaft, they inevitably generate unbalanced rotational inertial forces and inertial torques during operation. To eliminate these unbalanced inertial forces and torques, scroll compressors are typically equipped with a counterweight.
[0003] In existing scroll compressors, the balance block is generally a semi-circular structure. During rotation, the semi-circular balance block generates airflow resistance between its front surface and the refrigerant, increasing the compressor's power consumption and producing strong airflow turbulence, thus increasing compressor noise. Therefore, to reduce the turbulence caused by the balance block, a balance block cover is usually installed on its exterior.
[0004] However, as the rotational speed of the scroll compressor increases and the weight of the moving scroll plate continues to rise, the weight and height of the counterweight also need to increase accordingly. This leads to an increase in the installation height of the counterweight cover, which in turn increases the risk of counterweight cover deformation. Furthermore, because the counterweight cover adopts a circumferentially symmetrical structural design, simply increasing the thickness to improve the strength of the counterweight cover will not only increase the weight of the ineffective parts of the cover but also reduce the insulation distance between the counterweight cover and the terminal block. Utility Model Content
[0005] In view of this, the purpose of this application is to provide a balance block structure for a scroll compressor and a scroll compressor, so as to solve the problem of insufficient strength of the balance block cover when the speed of the scroll compressor is high.
[0006] According to a first aspect of the present invention, a balance block structure for a scroll compressor is provided, wherein the balance block structure for the scroll compressor includes: a balance block body, mounted on the crankshaft of the scroll compressor, the outer periphery of the balance block body having a complete annular curved surface; a hollow portion formed within the balance block body; and a solid portion formed within the balance block body, the solid portion and the hollow portion being located on opposite sides of the balance block body, respectively.
[0007] Preferably, the center of the balance block body has an axially extending mounting hole, through which the crankshaft passes.
[0008] Preferably, the main body of the balance block is cylindrical, and the hollow portion penetrates the top and bottom surfaces of the main body of the balance block along the axial direction.
[0009] Preferably, the cross-section of the hollowed-out portion is a semi-circular ring.
[0010] Preferably, the center of mass of the balance block body and the center of mass of the moving scroll disk of the scroll compressor are located on opposite sides of the axis of the crankshaft.
[0011] Preferably, a first gap is formed between the hollow portion and the annular curved surface, and a second gap is formed between the hollow portion and the mounting hole.
[0012] Preferably, the first interval portion is formed as an arc-shaped plate portion, and the thickness of the first interval portion is not less than 5 mm.
[0013] Preferably, the second spacer portion is formed as an arc-shaped plate portion, and the thickness of the second spacer portion is greater than 4 mm.
[0014] Preferably, the mounting hole of the balance block body is interference-fitted with the crankshaft.
[0015] According to a second aspect of the present invention, a scroll compressor is provided, wherein the scroll compressor includes a balance block structure for a scroll compressor as described above.
[0016] This invention relates to a balance block structure for a scroll compressor and a scroll compressor in which the balance block body is mounted on the crankshaft of the scroll compressor. The outer periphery of the balance block body forms a complete annular curved surface, preventing airflow disturbance during rotation and thus eliminating the need for a balance block cover. Hollowed-out and solid portions are formed within the balance block body, with the solid and hollow portions located on opposite sides of the body to balance the inertial torque generated by the moving scroll disc during operation. This effectively solves the problem of insufficient strength of the balance block cover when the scroll compressor operates at high speeds.
[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the balance block structure for a scroll compressor according to the present invention and a scroll compressor.
[0020] Figure 2This is a schematic diagram of the balance block structure for a scroll compressor according to this utility model.
[0021] Figure 3 This is a schematic diagram from another angle of the balance block structure for the scroll compressor according to this utility model.
[0022] Reference numerals in the attached drawings: 1-Balance block body; 10-Annular curved surface; 11-First interval; 12-Second interval; 100-Mounting hole; 2-Hollowed-out part; 3-Solid part; 4-Crankshaft; 41-Upper shaft part; 42-Main shaft part; 5-Moving scroll plate; 6-Frame. Detailed Implementation
[0023] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.
[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.
[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.
[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.
[0027] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.
[0028] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.
[0029] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0030] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.
[0031] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.
[0032] like Figures 1 to 3 As shown, according to a first aspect of the present invention, a balance block structure for a scroll compressor is provided, the balance block structure for a scroll compressor including a balance block body 1, a hollow part 2 and a solid part 3.
[0033] In the following description, reference will be made to Figures 1 to 3 The specific structure of the aforementioned components and their connection relationships are described in detail in the description of the balance block structure used in the scroll compressor.
[0034] like Figures 1 to 3 As shown, in this embodiment, the balance block body 1 can be installed on the crankshaft 4 of the scroll compressor. The outer periphery of the balance block body 1 has a complete annular curved surface 10, which prevents airflow disturbance during rotation, thus eliminating the need for the original balance block cover structure. The hollow portion 2 is formed inside the balance block body 1. The solid portion 3 is also formed inside the balance block body 1. The solid portion 3 and the hollow portion 2 can be located on opposite sides inside the balance block body 1 to balance the inertial torque generated by the moving scroll disk 5 during operation.
[0035] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the shape of the balance block body 1 can be cylindrical, and the annular curved surface 10 can be the circumferential surface of the balance block body 1. The hollow portion 2 can penetrate through the top and bottom surfaces of the balance block body 1 along the axial direction, thereby minimizing the weight of the side of the balance block body 1 with the hollow portion 2, and thus reducing the axial length of the balance block body 1.
[0036] However, this is not the only option. The fact that the hollow part 2 penetrates the top and bottom surfaces of the balance block body 1 along the axial direction is only a preferred embodiment. As long as the function of balancing the inertial torque of the balance block body 1 can be achieved, the hollow part 2 can also be configured in other ways. For example, the top and bottom surfaces of the balance block body 1 can be set as complete planes, so that the hollow part 2 is covered inside the balance block body 1.
[0037] Further optimized, such as Figures 1 to 3 As shown, in this embodiment, a mounting hole 100 extending axially can be formed in the center of the balance block body 1. The mounting hole 100 can be a cylindrical hole, through which the balance block body 1 can be mounted to the crankshaft 4. Specifically, the crankshaft 4 can pass through the mounting hole 100.
[0038] Furthermore, preferably, such as Figure 1As shown, in this embodiment, the crankshaft 4 of the scroll compressor may include an upper shaft portion 41 and a main shaft portion 42, which may be arranged sequentially from top to bottom. The moving scroll plate 5 can be mounted on the upper shaft portion 41 via an upper bearing to drive the moving scroll plate 5 to rotate. The central shaft portion can be mounted on the frame 6 via a central bearing, and the balance block body 1 can be mounted below the frame 6. The mounting hole 100 of the balance block body 1 can be interference-fitted with the central shaft portion; specifically, the balance block body 1 can be cold-pressed onto the main shaft portion 42 of the crankshaft 4.
[0039] In addition, preferred, such as Figures 1 to 3 As shown, in the embodiment, the cross-section of the hollow part 2 can be a semi-circular ring, that is, the hollow part 2 can be a semi-cylindrical hollow, thereby maximizing the weight difference between the two sides of the balance block body 1 (that is, the weight difference between the first side with the hollow part 2 and the second side with the solid part 3), so as to effectively achieve the function of balancing torque.
[0040] Preferred, such as Figure 2 and Figure 3 As shown, in the embodiment, a first gap 11 can be formed between the hollow part 2 and the annular curved surface 10, and a second gap 12 can be formed between the hollow part 2 and the mounting hole 100, so as to ensure the shape and structural strength of the balance block body 1.
[0041] Furthermore, preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, the hollow portion 2 can be coaxially arranged with the balance block body 1, so that the first interval portion 11 is formed as an arc-shaped plate portion. The thickness of the first interval portion 11 can be equal everywhere. Preferably, the thickness of the first interval portion 11 can be not less than 5mm to ensure the structural strength of the balance block body 1. Similarly, the second interval portion 12 can be formed as an arc-shaped plate portion, and the thickness of the second interval portion 12 can be equal everywhere. Preferably, the thickness of the second interval portion 12 can be greater than 4mm to ensure the structural strength of the balance block body 1.
[0042] In addition, such as Figure 1 As shown, according to a second aspect of the present invention, a scroll compressor is provided, the scroll compressor including the balance block structure for a scroll compressor as described above.
[0043] During use, the balance block body 1 is installed on the main shaft portion 42 of the crankshaft 4 of the scroll compressor. The cylindrical balance block body 1 forms a complete annular curved surface 10, thereby avoiding airflow disturbance during the rotation of the balance block body 1 and eliminating the need for the original balance block cover structure. Solid portions 3 and hollow portions 2 are formed on opposite sides inside the balance block body 1 to balance the inertial torque generated by the moving scroll disk 5 during operation. The balance block structure for the scroll compressor effectively improves the reliability of the scroll compressor at high speeds (160 rpm to 200 rpm) and is suitable for large-displacement compressors.
[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A balance block structure for a scroll compressor, disposed in the scroll compressor, characterized in that, The balance block structure for the scroll compressor includes: The balance block body is installed on the crankshaft of the scroll compressor, and the outer periphery of the balance block body forms a complete annular curved surface; The hollow portion is formed within the main body of the balance block; and A solid portion is formed within the main body of the balance block, and the solid portion and the hollow portion are respectively located on opposite sides of the main body of the balance block.
2. The balance structure for a scroll compressor according to claim 1, wherein The balance block body has an axially extending mounting hole in its center, through which the crankshaft passes.
3. The balance structure for a scroll compressor according to claim 2, wherein The main body of the balance block is cylindrical in shape, and the hollow part penetrates the top and bottom surfaces of the main body of the balance block along the axial direction.
4. The balance structure for a scroll compressor according to claim 3, wherein The cross-section of the hollowed-out part is a semi-circular ring.
5. The balance structure for a scroll compressor according to claim 4, wherein The center of mass of the balance block body and the center of mass of the moving scroll disk of the scroll compressor are located on opposite sides of the axis of the crankshaft.
6. The balance structure for a scroll compressor according to claim 4, wherein A first gap is formed between the hollow portion and the annular curved surface, and a second gap is formed between the hollow portion and the mounting hole.
7. The balance structure for a scroll compressor according to claim 6, wherein The first interval portion is formed as an arc-shaped plate portion, and the thickness of the first interval portion is not less than 5mm.
8. The balance structure for a scroll compressor according to claim 6, wherein The second spacer is formed as an arc-shaped plate, and the thickness of the second spacer is greater than 4 mm.
9. The balance structure for a scroll compressor according to claim 2, wherein The mounting holes of the balance block body are interference-fitted with the crankshaft.
10. A scroll compressor characterized by, The scroll compressor includes a balance block structure for a scroll compressor as described in any one of claims 1 to 9.