Low-noise compressor shell and compressor
By creating a honeycomb-like pitted surface on the compressor housing, the problems of increased housing thickness and manufacturing difficulty were solved, achieving the effects of noise reduction and cost savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUANGSHI DONPER COMPRESSOR CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-26
AI Technical Summary
Existing technologies increase the 7th natural frequency by increasing the thickness of the compressor housing, which leads to increased material and manufacturing costs and greater difficulty in molding.
A honeycomb-like textured surface is created on the compressor housing. Shot peening creates dense and uniform craters, increasing the sound wave reflection path, raising the natural frequency, and preventing resonance.
Without increasing the thickness of the sheet metal, the natural frequency of the shell was increased by about 500Hz, noise penetration was reduced, material costs were reduced by about 15% to 20%, and resonance problems were avoided.
Smart Images
Figure CN224282862U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressors, specifically to a low-noise compressor housing and compressor. Background Technology
[0002] The natural frequency of a compressor casing refers to its inherent resonant frequency when no external force is applied. Typically, when designing a compressor casing, the 7th natural frequency is used to evaluate the resonant frequency of the design. This frequency determines the casing's response to different noise frequencies during operation. Generally, the lower the natural frequency, the less energy is required to induce resonance, making it easier to achieve resonance, which in turn leads to increased vibration and noise.
[0003] In related technologies, in order to increase the 7th natural frequency of the shell, the shell plate is generally thickened. With the same design scheme, the 7th natural frequency increases as the plate is thickened. The higher the 7th natural frequency, the lower the probability of resonance.
[0004] However, increasing the thickness of the sheet metal to raise the 7th natural frequency of the casing increases the material cost of the compressor casing by about 15% to 20%, and the total cost of the compressor by about 1.5% to 2%. Increasing the density and hardness of the sheet metal to reduce noise radiation increases the difficulty and cost of sheet metal manufacturing. Thicker sheet metal makes casing forming more difficult, requiring a larger tonnage of punch press, and may even require equipment replacement, thus increasing equipment and energy costs. Utility Model Content
[0005] Based on the above description, this utility model provides a low-noise compressor housing and compressor to solve the problem in related technologies that increasing the housing thickness increases the cost and manufacturing difficulty of the compressor.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a low-noise compressor housing, comprising: a housing body, wherein the surface of the housing body is provided with a plurality of pits, the pits forming a honeycomb-like texture on the surface of the housing body.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the shell body is provided with the crater on both the outer and inner sides.
[0009] Furthermore, multiple craters are continuously and evenly distributed on the shell body.
[0010] Furthermore, the diameter of the crater is 0.1~0.3mm.
[0011] Furthermore, the depth of the crater is 0.3 to 0.5 mm.
[0012] Furthermore, the crater is circular or elliptical in shape.
[0013] Furthermore, the front end of the upper cover of the housing body is provided with a recess, which is used to abut against the compressor core inside the housing body.
[0014] Furthermore, the lower cover of the housing body is provided with support feet at the four corners, and the support feet are used to weld to the compressor support frame inside the housing body.
[0015] Furthermore, a mounting plate is fixed to the bottom of the housing body, and the mounting plate is provided with mounting holes.
[0016] Secondly, the present invention also provides a compressor comprising any of the aforementioned low-noise compressor housings.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0018] By treating the compressor housing surface to create pits, a honeycomb-like texture is achieved. The uneven surface of the housing increases the sound wave reflection path, reduces noise penetration, and raises the natural frequency of the entire unit, effectively preventing resonance problems. Attached Figure Description
[0019] Figure 1 A schematic diagram of the overall structure of the low-noise compressor housing provided in this embodiment of the utility model;
[0020] Figure 2 This is a partial structural schematic diagram of the compressor housing provided in an embodiment of the present utility model;
[0021] Figure 3 This is a schematic diagram of the internal structure of the compressor housing provided in an embodiment of the present invention.
[0022] The attached diagram lists the components represented by each number as follows:
[0023] 1. Housing body; 2. Cavity; 3. Depression; 4. Support leg; 5. Mounting plate; 6. Compressor core; 7. Compressor support frame. Detailed Implementation
[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0025] This utility model provides a low-noise compressor housing and compressor, which can solve the problem in related technologies that increasing the housing thickness increases the cost and manufacturing difficulty of the compressor.
[0026] This solution uses a high-speed impeller to propel steel shot at high speed, which then strikes the surface of the casing, thus strengthening the casing surface.
[0027] See Figure 1 As shown, the compressor housing provided in this embodiment of the present invention, after shot peening, forms dense, continuous, and uniform pits 2 on its surface, and the surface of the housing body 1 ultimately presents a honeycomb-like textured effect. The honeycomb-covered housing, through its uneven surface, increases the sound wave reflection path, raising the housing's 7th natural frequency by approximately 500Hz without increasing the thickness of the sheet metal, effectively avoiding resonance problems.
[0028] On the other hand, the impact of the projectile causes tiny indentations and plastic flow in the surface metal, forming a residual compressive stress layer. The residual compressive stress can offset some of the tensile stress during service and inhibit crack initiation and propagation. The impact causes the surface grains to break down and become finer, while the dislocation density increases and the surface hardness improves, making the surface more wear-resistant and suitable for working conditions that withstand friction or contact stress.
[0029] In some embodiments, the shell body 1 is provided with the crater 2 on both the outer and inner sides. A plurality of craters 2 are continuously and evenly distributed on the shell body 1. The diameter of the crater 2 is 0.1~0.3mm and the depth is 0.3~0.5mm. The shape of the crater 2 is circular or elliptical, which further increases the reflection effect of the sound source and reduces the penetration of noise.
[0030] The steel shot required to meet this technical requirement must be cast steel shot, and the diameter of the cast steel shot must be 1.4mm or more. The processed compressor housing can reduce the thickness of the plate material, thereby reducing the material cost of the plate material by about 15% to 20%, and effectively avoiding the resonance problem of 3150Hz in the refrigeration box.
[0031] In some embodiments, the front end of the upper cover of the housing body 1 is provided with a recess 3, which is used to abut against the compressor core 6 inside the housing body 1, and can limit the core during transportation to prevent the spring from dislodging.
[0032] In some embodiments, the lower cover of the housing body 1 is provided with four support feet 4 at its four corners. The support feet 4 are used to weld onto the compressor support frame 7 inside the housing body 1 to increase strength and ensure the stability of the compressor.
[0033] In some embodiments, a mounting plate 5 is fixed to the bottom of the housing body 1. The mounting plate 5 has mounting holes for mounting onto the refrigerator and fixing the compressor.
[0034] This utility model embodiment also provides a compressor, which includes any of the above-described low-noise compressor housings. The compressor can also implement any of the above-described low-noise compressor housings, which will not be described in detail here.
[0035] Tests showed that the mass production mode was 3248, while three shot-blasted shell tests showed a minimum of 3682 and a maximum of 3703. The natural frequency (first order) of the shell after shot blasting was increased by approximately 450 compared to the mass production machine.
[0036] Experiments showed that the shell mode primarily affects high-frequency noise at 3150 and 4000 Hz. The experiments mainly compared data at 140 Hz, as shown in the table below.
[0037] Conclusion: The shell mode is improved by about 450 after shot peening. The total value of the single machine data is similar. After the improvement, the shell mode and noise peak are closer to 4000Hz, and the 3150Hz is significantly reduced. The probability of resonance at 3150Hz is relatively small.
[0038]
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0040] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.
[0041] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.
[0042] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.
[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A low noise compressor housing characterized by, It includes: The shell body (1) has multiple bullet holes (2) on its surface, which make the surface of the shell body (1) form a honeycomb-like texture.
2. The low-noise compressor housing according to claim 1, characterized in that: The shell body (1) is provided with the crater (2) on both the outer and inner sides.
3. The low-noise compressor housing according to claim 1, characterized in that: Multiple craters (2) are continuously and evenly distributed on the shell body (1).
4. The low-noise compressor housing according to claim 1, characterized in that: The diameter of the crater (2) is 0.1~0.3mm.
5. The low-noise compressor housing according to claim 1, characterized in that: The depth of the crater (2) is 0.3 to 0.5 mm.
6. The low-noise compressor housing according to claim 1, characterized in that: The crater (2) is circular or elliptical in shape.
7. The low-noise compressor housing according to claim 1, characterized in that: The front end of the upper cover of the housing body (1) is provided with a recess (3), which is used to abut against the compressor core (6) inside the housing body (1).
8. The low-noise compressor housing according to claim 1, characterized in that: The lower cover of the housing body (1) is provided with four support feet (4) at the four corners. The support feet (4) are used to be welded to the compressor support frame (7) inside the housing body (1).
9. The low-noise compressor housing according to claim 1, characterized in that: The bottom of the housing body (1) is fixed with a mounting plate (5), and the mounting plate (5) is provided with mounting holes.
10. A compressor characterized by, It includes the low-noise compressor housing as described in any one of claims 1 to 9.