CN108185824A - The shell and its electrical equipment of a kind of home appliance - Google Patents

Abstract

The present invention relates to the technical field of vibration reduction and noise reduction, and in particular to a casing of household electrical appliances and the electrical equipment thereof. The present invention includes: a casing, the surface of which is provided with an acoustic black hole structure; the acoustic black hole structure includes: The surface of the casing is inwardly recessed to form a cavity, the inclination of the inner wall of the cavity from the opening to the bottom gradually becomes smaller, and the bottom of the cavity is provided with a damping element. The shell of the present invention reduces the broadband noise transmitted and radiated by the shell without increasing the use of reinforcing ribs and damping materials. It hardly requires any additional cost and additional design space, and is suitable for compact structures. The shell design effectively saves the production cost of the product.

Description

Shell of a household electrical appliance and its electrical equipment

technical field

The invention relates to the technical field of fluid noise reduction, in particular to a casing of a household electrical appliance and an electrical appliance with the function of suppressing vibration and sound radiation.

Background technique

With the gradual improvement of people's living standards, the application of electrical equipment in people's daily life is becoming more and more frequent, and people's requirements for it are getting higher and higher; and in the existing electrical equipment, it is often equipped with some Components that generate high noise, such as motors, cylinders, water pumps and other power components; the noise generated by the power components is mainly transmitted to the outside of the body in two ways, one is the sound of the power components themselves, which penetrates the shell of the body and transmits The other way is that when the power element is running, its own vibration is transmitted to the shell, which induces the vibration and sound radiation of the shell, and transmits the noise to the external environmental space.

In order to suppress the vibration-acoustic radiation of the shell, in the prior art, it is necessary to modify the structure of the shell and add reinforcing ribs locally to suppress the vibration of the structure itself and avoid the mode with high sound radiation efficiency. However, due to different structural forms and boundary conditions, the modes that need to be suppressed are not the same, which requires a lot of time and complex theoretical calculations for the specific product structure, and the added ribs also need to occupy a certain amount of time. The design space is not suitable for products with a relatively compact overall structure; or, a large amount of expensive damping materials are installed on the shell to reduce the vibration of the structure; All can greatly increase the production cost of product.

Contents of the invention

In order to overcome the above defects, the object of the present invention is to provide a pulsation attenuation device and a water purifier with good shock and noise reduction effects.

The purpose of the present invention is achieved through the following technical solutions:

The present invention is a housing of a household electrical appliance, comprising:

a shell, the surface of which is provided with an acoustic black hole structure;

The acoustic black hole structure includes: a cavity formed by inwardly recessing from the surface of the housing, the inclination of the inner wall of the cavity gradually decreases from the opening to the bottom, and a damping member is provided at the bottom of the cavity .

In the present invention, the acoustic black hole structure is arranged on the inner surface of the casing.

In the present invention, the acoustic black hole structure is provided on the inner surface and the outer surface of the housing.

In the present invention, the number of acoustic black hole structures distributed on the inner surface of the housing is the same as the number of acoustic black hole structures distributed on the outer surface.

In the present invention, the acoustic black hole structures on the inner surface and the outer surface of the shell are distributed in a centrosymmetric manner with the center of gravity of the surface as the center of symmetry.

In the present invention, the acoustic black hole structure includes a bottom wall, a first inner wall extending upward from the bottom wall, a second inner wall, a third inner wall, and a fourth inner wall, the bottom wall is rectangular, and the first inner wall and the second inner wall Opposite and both are arc-shaped surfaces, the third inner wall and the fourth inner wall are opposite and their bottom edges are straight edges, the two sides are arc edges and their top edges are flush with the surface of the housing, 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.

In the present invention, the cross section of the inner wall of the cavity is circular.

In the present invention, the acoustic black hole structures on the inner surface of each shell and the acoustic black hole structures on the outer surface are symmetrically distributed on both sides with the tangent plane passing through the center of gravity of the shell as the plane of symmetry.

In the present invention, the bottom of the acoustic black hole structure on the inner surface of the casing communicates with the bottom of the aligned acoustic black hole structure on the outer surface through a through hole, and the damping element is filled in the through hole.

The present invention is an electrical device, comprising: a main body, a power element and the above-mentioned casing, the power element is arranged in the main body, the casing is assembled on the main body, and covers the power element above.

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 of the present invention reduces the broadband noise transmitted and radiated by the shell without increasing the use of reinforcing ribs and damping materials. It hardly requires any additional cost and additional design space, and is suitable for compact structures. The shell design effectively saves the production cost of the product.

Description of drawings

For ease of illustration, the present invention is described in detail by the following preferred embodiments and accompanying drawings.

Fig. 1 is the structural representation of the inner surface of the shell of the present invention;

Fig. 2 is a schematic structural view of the outer surface of the shell of the present invention in one embodiment;

Fig. 3 is the sectional structure schematic diagram of the shell in the present invention;

Fig. 4 is a structural schematic diagram of an embodiment of the acoustic black hole structure in the present invention;

Fig. 5 is a structural schematic diagram of another embodiment of the acoustic black hole structure in the present invention;

Fig. 6 is a structural schematic diagram of another embodiment of the acoustic black hole structure in the present invention;

Fig. 7 is a schematic structural diagram of electrical equipment in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this embodiment according to specific situations.

The following is a specific description of a housing of a household electrical appliance of the present invention in an embodiment, please refer to FIG. 1 , which includes:

Housing 10, the surface of the housing 10 is provided with an acoustic black hole structure 20;

The acoustic black hole structure 20 includes: a cavity formed by inwardly recessing from the surface of the housing 10, the inclination of the inner wall 21 of the cavity from the opening to the bottom gradually becomes smaller, and the bottom of the cavity is provided with a damping member twenty two.

Among them, the acoustic black hole (ABH) effect is to use the gradient change of the geometric parameters or material characteristic parameters of the thin-walled structure to gradually reduce the propagation speed of the wave in the structure. Ideally, the wave speed is reduced to zero so that no Reflection phenomenon, the main method to realize the acoustic black hole effect is to cut the thickness of the thin plate structure according to certain rules, and use the acoustic black hole to gather the wave energy propagating in the structure at a specific position. Acoustic black holes have the characteristics of broadband, high efficiency, and simple and flexible implementation methods for gathering waves, and have obvious advantages in applications such as vibration and noise reduction and energy recovery of thin-walled structures.

The damping element 22 at the bottom of the acoustic black hole structure 20 is used to absorb the energy gathered by the acoustic black hole structure 20 to achieve the function of reducing structural vibration and sound radiation; The role of energy dissipation. The damping element 22 is made of damping material, which is used to convert the kinetic energy of solid mechanical vibration into heat energy and dissipate it, mainly used for vibration and noise control.

In this embodiment, the acoustic black hole structure 20 is disposed on the inner surface 11 of the housing 10 . In order to ensure the beautiful appearance of the product, the present invention can design the acoustic black hole structure 20 only on the inner surface 11 of the housing 10 .

Please refer to Fig. 2, in the present embodiment, the quantity of the acoustic black hole structure 20 is more than two, and the inner surface and the outer surface of the shell are provided with the acoustic black hole structure, and the acoustic black hole structure 20 is respectively arranged on The inner surface 11 and the outer surface 12 of the housing 10 can make it have a better noise suppression effect.

Please refer to FIG. 3 , in this embodiment, the number of acoustic black hole structures distributed on the inner surface of the housing is the same as the number of acoustic black hole structures distributed on the outer surface, and the number is more than two. By arranging a plurality of acoustic black hole structures 20 on the inner surface 11 and the outer surface 12 of the housing 10, the acoustic black hole structures 20 can cover the plane parts of the inner and outer surfaces 11, 12 of the housing 10, and the noise suppression effect is better. and because the arc curve of the inner wall 21 of the acoustic black hole structure 20 needs to satisfy the following relationship: y(x)=εx ^m , m≥2, ε≥0;

Wherein, y is the depth of the acoustic black hole structure 20 , and x is the radius of the acoustic black hole structure 20 .

It can be seen from the above curve relationship that, under the condition that the surface area of the shell 10 is constant, if there is only one acoustic black hole structure 20 on one surface, and in order to allow the acoustic black hole structure 20 to cover the surface of the shell 10 as much as possible, it needs Increase the depth of the acoustic black hole structure 20, and in order to adapt to the depth of the acoustic black hole structure 20, the thickness of the housing 10 must also need to increase, which will increase the overall production cost of the product; The arrangement of multiple acoustic black hole structures 20 can effectively suppress the noise while effectively keeping the thickness of the casing 10 unchanged.

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 of each acoustic black hole structure 20 It is exactly the same as the design; it is distributed in a centrally symmetrical manner, and has broadband effects such as increased sound insulation/sound absorption.

Please refer to Fig. 4, in this embodiment, the cross-section of the inner wall 21 of the cavity is circular, and the cross-section of the internal wall 21 of the cavity is set to a circular shape, which will be more conducive to gathering wave energy in the cavity In the damping member 22 at the bottom.

In this embodiment, the acoustic black hole structure 20 on the inner surface 11 of each shell 10 and the acoustic black hole structure 20 on the outer surface 12 take the tangent plane passing through the center of gravity of the shell 10 as a symmetrical plane, forming two distributed in a laterally symmetrical manner.

Please refer to FIG. 5. In another embodiment, the acoustic black hole structure 20 includes a bottom wall, a first inner wall 211 extending upward from the bottom wall, a second inner wall 212, a third inner wall 213, and a fourth inner wall. The bottom wall is rectangular, the first inner wall 211 and the second inner wall 212 are opposite and both are arc-shaped, the third inner wall 213 is opposite to the fourth inner wall and its bottom edge is a straight line, and the two sides are arc edges and its The top edge is flush with the surface of the housing, and the bottom wall, the first inner wall 211, the second inner wall 212, the third inner wall 213, and the fourth inner wall form a wedge-shaped recess, and the third inner wall 213 and the fourth inner wall The inner wall 214 is perpendicular to the surface of the casing 10, and the damping element 22 is disposed on the bottom surface; in this embodiment, the structure of the acoustic black hole structure 20 is simple, and its production and processing are relatively convenient.

Please refer to FIG. 6 , in another embodiment, the bottom of the acoustic black hole structure 20 on the inner surface 11 of the casing 10 communicates with the bottom of the acoustic black hole structure 20 aligned on the outer surface 12 through a through hole, and the The damping element 22 is filled in the through hole; wherein, the thickness of the damping element 22 is 10%-50% of the thickness of the housing 10, specifically, in this embodiment, the thickness of the housing 10 is 2.5 mm, using The thickness of the damping element 22 is 0.5mm; since the bottom of the acoustic black hole structure 20 on the outer surface 12 of the housing 10 communicates with the bottom of the inner surface 11, and share a damping element 22, only the damping element 22 needs to be plugged into the through hole during installation , nesting the through holes, the damping elements 22 on the two acoustic black hole structures 20 can be installed at one time, which effectively saves the cost of the production process, and thus saves the overall production cost.

Please refer to Fig. 7, the present invention is an electrical equipment, comprising: a main body 30, a power element and a casing as above, the power element is arranged in the main body 30, the casing is assembled on the main body 30, and its Overlay the power element. When the power element in the electrical equipment is activated, the wave energy generated by its vibration is transmitted to the shell through the main body, and the wave energy on the shell will be gathered in the acoustic black hole structure 20, and the damping in the acoustic black hole structure 20 The component 22 will dissipate the collected wave energy; effectively prevent the wave energy from radiating to the external environment to cause noise, and installing the shell on the power element will help prevent the transmission of sound waves.

The electrical equipment of the present invention includes various electrical equipment with power elements; it is not specifically limited here.

In this embodiment, the power element includes: a motor and/or a cylinder and/or a water pump. The power element is the main source of noise in the equipment because it generates relatively large vibrations during operation.

The motor referred to here is commonly known as a motor, which refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction, which may include: DC motors and AC motors. The cylinder referred to here is a cylindrical metal part that guides the piston to perform linear reciprocating motion in the cylinder, which may include: a cylinder that performs reciprocating linear motion and a cylinder that performs reciprocating swing; the water pump referred to here includes various A machine that transports liquid or pressurizes liquid, not specifically limited here.

In the present invention, the main body is a water purifier. The water purifier is a water treatment equipment that performs deep filtration and purification treatment of water quality according to the use requirements of water. The present invention applies the principle of the acoustic black hole to the design of the shell of the water purifier. According to test measurements, after the shell of the water purifier is equipped with the acoustic black hole structure, it can achieve a broadband noise reduction effect of more than 3dB.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean that the embodiments are combined A specific feature, structure, material, or characteristic described or exemplified 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 described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (12)

1. a kind of shell of home appliance, which is characterized in that including：Housing, the surface of the housing are provided with acoustics black hole knot Structure；

Acoustics black hole structure includes：Be recessed inwardly the pothole to be formed from the surface of the housing, the inner wall of the pothole Gradient from opening to bottom tapers into, and the bottom of the pothole is equipped with damping piece.

2. the shell of home appliance according to claim 1, which is characterized in that acoustics black hole structure setting is in the shell On the inner surface of body.

3. the shell of home appliance according to claim 2, which is characterized in that on the inner surface of the housing and outer surface On be equipped with the acoustics black hole structure.

4. the shell of home appliance according to claim 3, which is characterized in that the acoustics being distributed in the shell inner surface The quantity of black hole structure is identical with the acoustics black hole number of structures being distributed on outer surface.

5. the shell of home appliance according to claim 4, which is characterized in that in the inner surface and the outer surface of the housing Acoustics black hole structure using the center of gravity on its surface as symmetrical centre, the mode being centrosymmetric is distributed.

6. the shell of home appliance according to claim 5, which is characterized in that acoustics black hole structure include bottom wall, The first inner wall, the second inner wall, third inner wall, the 4th inner wall upwardly extended by bottom wall, the bottom wall be rectangle, the first inner wall and Second inner wall is opposite and is arcwall face, the third inner wall and the 4th inner wall is opposite and its base is straight line, and two sides are Camber line side and the surface of its top margin and housing is flush, the bottom wall, the first inner wall, the second inner wall, third inner wall, the 4th inner wall Surround the pothole of a wedge shape.

7. the shell of home appliance according to claim 5, which is characterized in that the cross section of the inner wall of the pothole is circle Annular.

8. the shell of home appliance according to claim 7, which is characterized in that the sound on the inner surface of each housing Black hole structure is learned between the acoustics black hole structure on outer surface using the tangent plane by housing center of gravity as the plane of symmetry, in both sides Symmetrical mode is distributed.

9. the shell of home appliance according to claim 8, which is characterized in that the acoustics on the inner surface of the housing is black The bottom of hole structure is connected, and the damping with the bottom of acoustics black hole structure that it is aligned on the outer surface by through-hole Part is filled among the through-hole.

10. a kind of electrical equipment, which is characterized in that including：Main body, dynamical element and outer as described in claim 1 to 9 Shell, the dynamical element are set in the main body, and the shell is assemblied on the main body, and it is covered in the dynamical element On.

11. electrical equipment according to claim 10, which is characterized in that the dynamical element includes：Motor and/or cylinder And/or water pump.

12. electrical equipment according to claim 11, which is characterized in that the main body is water purifier.