CN108185824B - Shell of household electrical appliance and electrical appliance - Google Patents
Shell of household electrical appliance and electrical appliance Download PDFInfo
- Publication number
- CN108185824B CN108185824B CN201810010545.9A CN201810010545A CN108185824B CN 108185824 B CN108185824 B CN 108185824B CN 201810010545 A CN201810010545 A CN 201810010545A CN 108185824 B CN108185824 B CN 108185824B
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- Prior art keywords
- wall
- black hole
- acoustic black
- shell
- casing
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/4403—Constructional details
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
Abstract
The invention relates to the technical field of vibration and noise reduction, in particular to a shell of household electrical appliance and the household electrical appliance, the invention comprises: the surface of the shell is provided with an acoustic black hole structure; the acoustic black hole structure includes: the inner wall of the concave hole has a gradually reduced gradient from the opening to the bottom, and the bottom of the concave hole is provided with a damping piece. The shell reduces the broadband noise of the transmission and radiation of the shell under the condition of not additionally arranging the reinforcing ribs and the damping materials, hardly needs to increase any cost, does not need extra design space, is suitable for the design of the shell with compact structure, and effectively saves the production cost of products.
Description
Technical Field
The invention relates to the technical field of fluid noise reduction, in particular to a shell of household electrical appliance equipment and the electrical appliance equipment with a vibration sound radiation inhibition function.
Background
Along with the gradual improvement of the living standard of people, the application of electrical equipment in the daily life of people is more and more frequent, and the requirements of people on the electrical equipment are higher and higher; in the existing electrical equipment, some parts which can generate high noise are often provided, such as: power elements such as a motor, a cylinder and a water pump; the noise generated by the power element is mainly transmitted to the outside of the machine body in two modes, one mode is that the sound of the power element penetrates through the shell of the machine body and is transmitted to the external environment space; another way is that when the power element is operated, its own vibration is transmitted to the housing, inducing vibration sound radiation of the housing, and transmitting noise to the external ambient space.
In order to suppress the vibration sound radiation of the housing, in the prior art, the structure of the housing needs to be modified, and reinforcing ribs are locally added to suppress the vibration of the structure and avoid the mode with high sound radiation efficiency. Because of different structural forms and boundary conditions, modes to be suppressed are different, a large amount of time is required for specific product structures, complex theoretical calculation is required, and the added reinforcing ribs also need to occupy certain design space, so that the method is not suitable for products with compact overall structures; or, a large amount of expensive damping materials are arranged on the shell, and the structure of the shell is subjected to vibration reduction treatment; therefore, the method of arranging the reinforcing ribs or applying a large amount of damping materials can greatly increase the production cost of the product.
Disclosure of Invention
In order to overcome the above drawbacks, the present invention provides a pulsation damping device and a water purifier with good damping and noise reduction effects.
The purpose of the invention is realized by the following technical scheme:
the invention is a housing for a home appliance, comprising:
the surface of the shell is provided with an acoustic black hole structure;
the acoustic black hole structure includes: the inner wall of the concave hole has a gradually reduced gradient from the opening to the bottom, and the bottom of the concave hole is provided with a damping piece.
In the present invention, the acoustic black hole structure is disposed on an inner surface of the case.
In the invention, the acoustic black hole structures are arranged on the inner surface and the outer surface of the shell.
In the invention, the number of the acoustic black hole structures distributed on the inner surface of the shell is the same as that of the acoustic black hole structures distributed on the outer surface.
In the invention, the acoustic black hole structures on the inner surface and the outer surface of the shell are distributed in a centrosymmetric mode by taking the gravity center of the surface of the shell as a symmetric center.
In the invention, the acoustic black hole structure comprises a bottom wall, a first inner wall, a second inner wall, a third inner wall and a fourth inner wall, wherein the first inner wall, the second inner wall, the third inner wall and the fourth inner wall extend upwards from the bottom wall, the bottom wall is rectangular, the first inner wall and the second inner wall are opposite and arc-shaped surfaces, the third inner wall and the fourth inner wall are opposite, the bottom edges of the third inner wall and the fourth inner wall are straight edges, two side edges are arc-shaped edges, the top edges of the third inner wall and the fourth inner wall are flush with the surface of the shell, and the bottom wall, the first inner wall, the second inner wall.
In the invention, the cross section of the inner wall of the concave hole is circular.
In the invention, the acoustic black hole structure on the inner surface of each shell and the acoustic black hole structure on the outer surface of each shell are distributed in a bilaterally symmetrical mode by taking a tangent plane passing through the center of gravity of the shell as a symmetrical plane.
In the present invention, the bottom of the acoustic black hole structure on the inner surface of the case is communicated with the bottom of the acoustic black hole structure aligned on the outer surface thereof through a through hole, and the damping member is filled in the through hole.
The invention is an electrical apparatus comprising: the power element is arranged in the main machine body, and the shell is assembled on the main machine body and covers the power element.
In the present invention, the power element includes: a motor and/or a cylinder and/or a water pump.
In the present invention, the main body is a water purifier.
The shell reduces the broadband noise of the transmission and radiation of the shell under the condition of not additionally arranging the reinforcing ribs and the damping materials, hardly needs to increase any cost, does not need extra design space, is suitable for the design of the shell with compact structure, and effectively saves the production cost of products.
Drawings
For the purpose of easy explanation, the present invention will be described in detail with reference to the following preferred embodiments and the accompanying drawings.
FIG. 1 is a schematic view of the structure of the inner surface of the housing of the present invention;
FIG. 2 is a schematic structural view of the outer surface of the housing of the present invention in one embodiment;
FIG. 3 is a schematic cross-sectional view of the housing of the present invention;
FIG. 4 is a schematic diagram of an acoustic black hole structure in one embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an acoustic black hole structure according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an acoustic black hole structure in another embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electrical apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations.
The following describes a housing of a home appliance according to an embodiment of the present invention, with reference to fig. 1, which includes:
a casing 10, wherein the surface of the casing 10 is provided with an acoustic black hole structure 20;
the acoustic black hole structure 20 includes: a cavity formed by being depressed inward from the surface of the housing 10, the inner wall 21 of the cavity having a gradually decreasing inclination from the opening to the bottom, and the bottom of the cavity being provided with a damping member 22.
The main method for realizing the acoustic black hole effect is to cut the thickness of a thin plate structure according to a certain rule, and gather wave energy transmitted in the structure at a specific position by using the acoustic black hole. The acoustic black hole has the characteristics of wide frequency, high efficiency, simple and flexible implementation method and the like for wave collection, and has obvious advantages in the applications of vibration reduction, noise reduction, energy recovery and the like of a thin-wall structure.
The damping piece 22 at the bottom of the acoustic black hole structure 20 is used for absorbing the energy gathered by the acoustic black hole structure 20, so that the functions of reducing the structure vibration and the acoustic radiation are achieved; the cavity acts as an energy sink in the solution and the damping member 22 acts as an energy dissipation. The damping member 22 is comprised of a damping material for converting the kinetic energy of solid mechanical vibrations to heat energy for dissipation, primarily for vibration and noise control.
In the present embodiment, the acoustic black hole structure 20 is disposed on the inner surface 11 of the casing 10. In order to ensure the aesthetic appearance of the product, the present invention may design the acoustic black hole structure 20 only on the inner surface 11 of the casing 10.
Referring to fig. 2, in the present embodiment, the number of the acoustic black hole structures 20 is more than two, and the acoustic black hole structures are disposed on the inner surface and the outer surface of the casing, so that the acoustic black hole structures 20 are respectively disposed on the inner surface 11 and the outer surface 12 of the casing 10, which can provide better noise suppression effect.
Referring to fig. 3, in the present embodiment, the number of the acoustic black hole structures distributed on the inner surface of the shell is the same as the number of the acoustic black hole structures distributed on the outer surface, and the number of the acoustic black hole structures is two or more. By arranging a plurality of acoustic black hole structures 20 on the inner surface 11 and the outer surface 12 of the shell 10, the acoustic black hole structures 20 can be distributed on the plane parts of the inner surface 11 and the outer surface 12 of the shell 10, and the noise suppression effect is better; and the radian curves of the inner wall 21 of the acoustic black hole structure 20 need to satisfy the following relations: y (x) xm，m≥2，≥0；
Where y is the depth of the acoustic black hole structure 20 and x is the radius of the acoustic black hole structure 20.
As can be seen from the above curve relationship, under the condition that the surface area of the casing 10 is not changed, if only one acoustic black hole structure 20 is arranged on one surface, and in order to make the acoustic black hole structure 20 cover the surface of the casing 10 as much as possible, the depth of the acoustic black hole structure 20 needs to be increased, and in order to adapt to the depth of the acoustic black hole structure 20, the thickness of the casing 10 also needs to be increased inevitably, which will increase the overall production cost of the product; in the present embodiment, the plurality of acoustic black hole structures 20 are disposed on the surface of the casing 10, so that the thickness of the casing 10 is effectively kept unchanged while noise is suppressed to the maximum extent.
In this embodiment, the acoustic black hole structures 20 on the inner surface 11 and the outer surface 12 of the casing 10 are distributed in a centrosymmetric manner with the center of gravity of the surface as the center of symmetry, and the mechanism and design of each acoustic black hole structure 20 are completely the same; the distribution is in a central symmetry mode, and the broadband effect of sound insulation/sound absorption is improved.
Referring to fig. 4, in the present embodiment, the cross section of the inner wall 21 of the cavity is circular, and the cross section of the inner wall 21 of the cavity is circular, which is more favorable for focusing the wave energy in the damping member 22 at the bottom of the cavity.
In the present embodiment, the acoustic black hole structure 20 on the inner surface 11 of each casing 10 and the acoustic black hole structure 20 on the outer surface 12 thereof are distributed in a bilaterally symmetrical manner with a tangential plane passing through the center of gravity of the casing 10 as a symmetrical plane.
Referring to fig. 5, in another embodiment, the acoustic black hole structure 20 includes a bottom wall, a first inner wall 211, a second inner wall 212, a third inner wall 213, and a fourth inner wall extending upward from the bottom wall, the bottom wall is rectangular, the first inner wall 211 and the second inner wall 212 are both arc-shaped surfaces, the third inner wall 213 and the fourth inner wall are opposite, the bottom edges thereof are straight edges, two side edges are arc-shaped edges, and the top edges thereof are flush with the surface of the housing, the bottom wall, the first inner wall 211, the second inner wall 212, the third inner wall 213, and the fourth inner wall enclose a wedge-shaped concave hole, the third inner wall 213 and the fourth inner wall 214 are perpendicular to the surface of the housing 10, and the damping member 22 is disposed on the bottom surface; in this embodiment, the acoustic black hole structure 20 has a simple structure, and is convenient to produce and process.
Referring to fig. 6, in another embodiment, the bottom of the acoustic black hole structure 20 on the inner surface 11 of the casing 10 is communicated with the bottom of the acoustic black hole structure 20 aligned with the outer surface 12 thereof through a through hole, and the damping member 22 is filled in the through hole; the thickness of the damping member 22 is 10% -50% of the thickness of the housing 10, specifically, in this embodiment, the thickness of the housing 10 is 2.5mm, and the thickness of the damping member 22 is 0.5 mm; because the outer surface 12 of the shell 10 is communicated with the bottom of the acoustic black hole structure 20 of the inner surface 11 and shares one damping piece 22, when the damping piece 22 is installed, only the damping piece 22 needs to be plugged into the through hole and is nested in the through hole, the damping pieces 22 on the two acoustic black hole structures 20 can be installed at one time, the production process cost is effectively saved, and the overall production cost is further saved.
Referring to fig. 7, the present invention is an electrical apparatus, including: the main body 30, the power device and the housing as above, the power device is disposed in the main body 30, the housing is assembled on the main body 30, and it covers the power device. When the power element in the electrical equipment is started, the wave energy generated by the vibration of the power element is transmitted to the outer shell through the main machine body, the wave energy on the outer shell is gathered in the acoustic black hole structure 20, and the damping piece 22 in the acoustic black hole structure 20 dissipates the gathered wave energy; the wave energy is effectively prevented from being radiated to the external environment to cause noise, and the housing is mounted on the power element, which is advantageous to prevent the transmission of sound waves.
The electrical equipment comprises various electrical equipment with power elements; and is not particularly limited herein.
In this embodiment, the power element includes: the motor and/or the cylinder and/or the water pump, the power element is a main noise source in the equipment because the vibration generated by the power element is large during the working process.
The electric machine referred to herein is commonly referred to as a motor, and refers to an electromagnetic device for converting or transmitting electric energy according to the law of electromagnetic induction, and may include: direct current motors and alternating current motors. The cylinder referred to herein is a cylindrical metal work guiding a piston to perform a linear reciprocating motion in the cylinder, and may include: the air cylinder does reciprocating linear motion and the air cylinder does reciprocating swing; the water pump referred to herein includes various mechanisms for delivering or pressurizing a liquid, and is not particularly limited herein.
In the present invention, the main body is a water purifier. The water purifier is water treatment equipment for carrying out deep filtration and purification treatment on water quality according to the use requirement of the water. The invention applies the acoustic black hole principle to the design of the shell of the water purifier, and after the acoustic black hole structure is arranged in the shell of the water purifier through test and measurement, the noise reduction effect of over 3dB of broadband is obtained.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A housing for an electrical household appliance, comprising: the surface of the shell is provided with an acoustic black hole structure; the acoustic black hole structure includes: the inner wall of the concave hole has gradually reduced gradient from the opening to the bottom, and the bottom of the concave hole is provided with a damping piece;
at least two acoustic black hole structures are arranged on the inner surface and the outer surface of the shell;
the acoustic black hole structure on the inner surface of each shell and the acoustic black hole structure on the outer surface are distributed in a bilaterally symmetrical mode by taking a tangent plane passing through the center of gravity of the shell as a symmetrical plane;
the bottom of the acoustic black hole structure on the inner surface of the shell is communicated with the bottom of the acoustic black hole structure aligned on the outer surface of the shell through a through hole, and the damping piece is filled in the through hole.
2. The casing of household electrical appliance according to claim 1, wherein the number of the acoustic black hole structures distributed on the inner surface of the casing is the same as the number of the acoustic black hole structures distributed on the outer surface of the casing.
3. The casing of household electrical appliance according to claim 2, wherein the acoustic black hole structures on the inner surface and the outer surface of the casing are distributed in a centrosymmetric manner by taking the center of gravity of the surface as a symmetric center.
4. The casing of household electrical appliances of claim 3, wherein the acoustic black hole structure comprises a bottom wall, a first inner wall, a second inner wall, a third inner wall and a fourth inner wall extending upward from the bottom wall, the bottom wall is rectangular, the first inner wall and the second inner wall are opposite and are arc-shaped surfaces, the third inner wall and the fourth inner wall are opposite and have straight edges as bottom edges, the two side edges are arc-shaped edges, and the top edges of the third inner wall and the fourth inner wall are flush with the surface of the casing, and the bottom wall, the first inner wall, the second inner wall, the third inner wall and the fourth inner wall enclose a wedge-shaped concave hole.
5. A casing for an electric household appliance according to claim 3, wherein the inner wall of the cavity has a circular cross-section.
6. An electrical device, comprising: a main body, a power element and a housing as claimed in any one of claims 1 to 5, said power element being disposed in said main body, said housing being assembled to said main body and overlying said power element.
7. The electrical device of claim 6, wherein the power element comprises: a motor and/or a cylinder and/or a water pump.
8. The electrical apparatus of claim 6, wherein the main body is a water purifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010545.9A CN108185824B (en) | 2018-01-02 | 2018-01-02 | Shell of household electrical appliance and electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010545.9A CN108185824B (en) | 2018-01-02 | 2018-01-02 | Shell of household electrical appliance and electrical appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108185824A CN108185824A (en) | 2018-06-22 |
| CN108185824B true CN108185824B (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810010545.9A Active CN108185824B (en) | 2018-01-02 | 2018-01-02 | Shell of household electrical appliance and electrical appliance |
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| Country | Link |
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| CN (1) | CN108185824B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628602B (en) * | 2021-08-26 | 2023-07-04 | 东北大学 | Hexagonal periodic acoustic black hole vibration and noise reduction structure |
| CN114183489B (en) * | 2021-12-07 | 2022-12-16 | 西北工业大学 | Cylindrical shell vibration reduction structure based on acoustic black hole effect |
| CN116647800A (en) * | 2023-07-24 | 2023-08-25 | 荣耀终端有限公司 | Speaker module and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329852A (en) * | 2014-08-29 | 2015-02-04 | 青岛海尔股份有限公司 | Semiconductor refrigeration refrigerator and manufacturing method thereof |
| CN205578304U (en) * | 2016-03-11 | 2016-09-14 | 慈溪市附海蓝茂塑料制品厂 | Household electric fan |
| CN105942952A (en) * | 2016-05-09 | 2016-09-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine |
| CN106023978A (en) * | 2016-05-23 | 2016-10-12 | 南京航空航天大学 | Double-layer-board sonic black hole vibration and noise reduction structure |
| CN107339758A (en) * | 2017-08-22 | 2017-11-10 | 广东美的制冷设备有限公司 | Electric appliance casing and there is its air-conditioner outdoor unit |
-
2018
- 2018-01-02 CN CN201810010545.9A patent/CN108185824B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329852A (en) * | 2014-08-29 | 2015-02-04 | 青岛海尔股份有限公司 | Semiconductor refrigeration refrigerator and manufacturing method thereof |
| CN205578304U (en) * | 2016-03-11 | 2016-09-14 | 慈溪市附海蓝茂塑料制品厂 | Household electric fan |
| CN105942952A (en) * | 2016-05-09 | 2016-09-21 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine |
| CN106023978A (en) * | 2016-05-23 | 2016-10-12 | 南京航空航天大学 | Double-layer-board sonic black hole vibration and noise reduction structure |
| CN107339758A (en) * | 2017-08-22 | 2017-11-10 | 广东美的制冷设备有限公司 | Electric appliance casing and there is its air-conditioner outdoor unit |
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| Publication number | Publication date |
|---|---|
| CN108185824A (en) | 2018-06-22 |
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Effective date of registration: 20210319 Address after: 528311 Global Innovation Center, 4th Building and 2nd Floor, Meimei Industrial Avenue, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: GUANGDONG MEIDI WHITE HOUSEHOLD ELECTRICAL APPLIANCE TECHNOLOGY INNOVATION CENTER Co.,Ltd. Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311, 26-28, B District, Mei headquarters building, 6 Mei Road, Beijiao Town, Shunde District, Foshan, Guangdong. Patentee before: MIDEA GROUP Co.,Ltd. |
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