Low-noise compressor shell and compressor

Abstract

The low-noise compressor shell comprises a shell body, a plurality of craters are formed in the surface of the shell body, and the craters enable the surface of the shell body to form a honeycomb pitted surface. The surface of the compressor shell is treated to form craters, so that the surface of the shell presents a honeycomb pitted surface effect, the reflection path of sound waves is increased, the penetration of noise is reduced, the inherent frequency of the whole machine is improved and the resonance problem can be effectively avoided through the characteristic that the surface of the shell is uneven.

Description

Technical Field

[0001] The invention relates to the field of compressors, and in particular to a low-noise compressor housing and a compressor. Background Art

[0002] The natural frequency of the compressor housing refers to the inherent resonant frequency of the compressor housing without the action of external forces. Usually, when designing a compressor housing, the 7th order natural frequency is used to evaluate the resonant frequency of the design. This frequency determines the housing's response to the excitation of different frequencies of noise during operation. Generally, the lower the frequency, the less energy is needed to excite the resonance, and the easier it is to cause resonance, which leads to increased vibration and noise.

[0003] In the related art, in order to increase the 7th order natural frequency of the shell, the shell plate is generally thickened. With the same design, the 7th order natural frequency increases as the plate becomes thicker. The higher the 7th order natural frequency, the smaller the probability of exciting resonance.

[0004] However, increasing the thickness of the sheet to increase the 7th-order natural frequency of the shell increases the material cost of the compressor shell by about 15%~20%, and the total cost of the compressor increases by about 1.5%~2%; reducing noise radiation by increasing the density and hardness of the sheet increases the difficulty and cost of sheet manufacturing; as the sheet becomes thicker, the difficulty of shell forming increases, the required punching machine tonnage increases accordingly, and even the equipment needs to be replaced, increasing the equipment and energy consumption costs. Summary of the invention

[0005] Based on the above description, the present invention provides a low-noise compressor housing and a compressor to solve the problem in the related art that increasing the thickness of the housing increases the cost and manufacturing difficulty of the compressor.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a low-noise compressor housing, comprising: a housing body, a surface of the housing body is provided with a plurality of craters, and the craters form a honeycomb-like surface on the surface of the housing body.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the craters are provided on both the outer side and the inner side of the shell body.

[0009] Furthermore, a plurality of the craters are continuously and evenly distributed on the shell body.

[0010] Furthermore, the diameter of the crater is 0.1-0.3 mm.

[0011] Furthermore, the depth of the crater is 0.3-0.5 mm.

[0012] Furthermore, the shape of the crater is circular or oval.

[0013] Furthermore, a depression is provided at the front end of the upper cover of the housing body, and the depression is used to abut against the compressor core inside the housing body.

[0014] Furthermore, feet are provided at the four corners of the lower cover of the housing body, and the feet are used to be welded to the compressor support frame inside the housing body.

[0015] Furthermore, a mounting plate is fixed to the bottom of the housing body, and mounting holes are provided on the mounting plate.

[0016] In a second aspect, an embodiment of the present invention further provides a compressor, which includes the low-noise compressor housing according to any one of the above.

[0017] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects: By forming craters on the surface of the compressor housing, the surface of the housing presents a honeycomb pitted surface effect. Through the uneven characteristics of its surface, the housing increases the reflection path of sound waves, reduces the penetration of noise, and improves the natural frequency of the whole machine, effectively avoiding the resonance problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the low-noise compressor housing provided by the embodiment of the present invention; Figure 2 It is a schematic diagram of a partial structure of the compressor housing provided by the embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of the compressor housing provided by the embodiment of the present invention.

[0019] In the drawings, the list of components represented by each reference numeral is as follows: 1. Housing body; 2. Crater; 3. Depression; 4. Feet; 5. Mounting plate; 6. Compressor core; 7. Compressor support frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is thorough and comprehensive.

[0021] An embodiment of the present invention provides a low-noise compressor housing and a compressor, which can solve the problems in the related art that increasing the thickness of the housing increases the cost and manufacturing difficulty of the compressor.

[0022] This solution uses a high-speed impeller to project steel shots at high speed, hitting the surface of the housing, and forming a strengthening solution for the housing surface.

[0023] See Figure 1 As shown, after the compressor housing provided by the embodiment of the present invention undergoes shot peening treatment, dense, continuous, and uniform craters 2 are formed on the surface, and the surface of the housing body 1 finally presents a honeycomb-like pitted surface effect. The housing covered with honeycombs increases the reflection path of sound waves through the uneven surface characteristics, and can increase the 7th-order natural frequency of the housing by about 500 Hz without increasing the thickness of the plate, effectively avoiding the resonance problem.

[0024] On the other hand, the impact of the shots causes micro-depressions and plastic flow on the surface layer metal, forming a residual compressive stress layer. The residual compressive stress can offset part of the tensile stress during service, inhibiting crack initiation and propagation; the impact causes the surface layer grains to break and refine, and at the same time the dislocation density increases, and the surface hardness increases, making the surface more wear-resistant and suitable for working conditions that bear friction or contact stress.

[0025] In some embodiments, both the outer side and the inner side of the housing body 1 are provided with the craters 2, and a plurality of the craters 2 are continuously and evenly distributed on the housing body 1. The diameter of the crater 2 is 0.1~0.3 mm, and the depth is 0.3~0.5 mm. The shape of the crater 2 is circular or elliptical, further increasing the reflection effect of the sound source and reducing the penetration of noise.

[0026] The steel shots meeting this technical requirement need to be cast steel shots, and the diameter of the cast steel shots needs to reach more than 1.4 mm. The processed compressor housing can reduce the thickness of the plate, realizing a reduction in the plate material cost of about 15%~20%, and effectively avoiding the resonance problem of 3150 Hz on the refrigeration box body.

[0027] In some embodiments, a depression 3 is provided at the front end of the upper cover of the housing body 1, and the depression 3 is used to abut against the compressor core 6 inside the housing body 1, which can limit the core during transportation and prevent de-springing.

[0028] In some embodiments, feet 4 are provided at the four corners of the lower cover of the housing body 1, and the feet 4 are used to be welded to the compressor support frame 7 inside the housing body 1 to increase strength and ensure the stability of the compressor.

[0029] In some embodiments, a mounting plate 5 is fixed to the bottom of the housing body 1, and mounting holes are provided on the mounting plate 5 for mounting to the refrigerator to fix the compressor.

[0030] An embodiment of the present invention further provides a compressor, which includes the low-noise compressor housing described in any of the above, and the compressor can also implement any of the embodiments of the above low-noise compressor housing, which will not be elaborated here.

[0031] After testing, in mass production mode 3248, three shot-peened housings were tested, with the lowest being 3682 and the highest being 3703. The natural frequency (first order) of the shot-peened housing increased by approximately 450 compared to the mass-produced machine.

[0032] Through experiments, the housing mode mainly affects the high-frequency noise at 3150 and 4000 Hz. The experiment mainly compared the 140 Hz data, as shown in the following table.

[0033] Conclusion: The housing mode after shot peening increased by approximately 450. The total single-machine data values are equivalent. After the increase, the housing mode and noise peak are closer to 4000 Hz, and the 3150 Hz decreased significantly, and the probability of resonance at 3150 Hz is relatively small.

[0034]

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] It can be understood that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein 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 relationship terms also include different orientations of the device during use and operation. For example, if the device in the figure is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial description used herein is accordingly interpreted.

[0037] It should be noted that when an 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 intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transfer between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0038] As used herein, the singular forms "a", "an" and "the" may also include the plural unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc. specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-noise compressor housing, characterized in that, It includes: A housing body (1), on the surface of which there are a plurality of craters (2), and the craters (2) make the surface of the housing body (1) form a honeycomb-like pitted surface.

2. The low-noise compressor housing according to claim 1, wherein: The craters (2) are provided on both the outer side and the inner side of the housing body (1).

3. The low-noise compressor housing according to claim 1, wherein: A plurality of the craters (2) are continuously and evenly distributed on the housing body (1).

4. The low-noise compressor housing according to claim 1, wherein: The diameter of the crater (2) is 0.1 - 0.3 mm.

5. The low-noise compressor housing according to claim 1, wherein: The depth of the crater (2) is 0.3 - 0.5 mm.

6. The low-noise compressor housing according to claim 1, wherein: The shape of the crater (2) is circular or oval.

7. The low-noise compressor housing according to claim 1, wherein: At the front end of the upper cover of the housing body (1) there is a depression (3), and the depression (3) is used to abut against the compressor core (6) inside the housing body (1).

8. The low-noise compressor housing according to claim 1, wherein: At the four corners of the lower cover of the housing body (1) there are feet (4), and the 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, wherein: An installation plate (5) is fixed to the bottom of the housing body (1), and installation holes are provided on the installation plate (5).

10. A compressor, characterized in that, It includes the low-noise compressor housing according to any one of claims 1 - 9.

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