CN205893719U - A washing machine that is used for washing machine's box and has it - Google Patents

Abstract

The utility model discloses a washing machine that is used for washing machine's box and has it, a box includes for washing machine: first box and second box, the second box is established the inboard of first box, the second box with inject the helmholtz resonance chamber between the first box, be formed with on the second box with the communicating a plurality of helmholtz through -holes in helmholtz resonance chamber. According to the utility model discloses a second box and helmholtz resonant cavity can form helmholtz resonance sound absorbing structure that is used for washing machine's box, has a helmholtz through -hole through the adoption to reach sound absorption and noise reduction's mesh.

Description

For the casing of washing machine with have its washing machine

Technical field

This utility model is related to household appliance technical field, especially relates to a kind of casing for washing machine and has washing of its Clothing machine.

Background technology

With the progress of society and science and technology, user's also more and more higher of the requirement to washing machine noise.Meanwhile, noise level It is an important indicator weighing washing machine quality.However, the general all ratios of the noise of washing machine are larger, there is presently no maturation Solution.

Utility model content

This utility model is intended at least solve one of technical problem present in prior art.For this reason, it is of the present utility model One purpose is to propose a kind of casing for washing machine, has the effect of sqouynd absorption lowering noise.

Another purpose of the present utility model is to propose a kind of washing machine with above-mentioned casing.

According to this utility model first aspect for washing machine casing, comprising: the first casing；With the second casing, institute State the inner side that the second casing is located at described first casing, between described second casing and described first casing, limit Helmholtz Resonant cavity, described second casing is formed with the multiple Helmholtz's through holes being communicated with described helmholtz resonance chamber.

According to the casing for washing machine of the present utility model, by using second casing with Helmholtz's through hole and Helmholtz resonance chamber can form helmholtz resonance sound absorption structure, thus reaching the purpose of sqouynd absorption lowering noise.

According to some embodiments of the present utility model, between the corresponding open end of described first casing and described second casing Closed by closed plate respectively.

Alternatively, described closed plate is by the corresponding open end of at least one of described first casing and described second casing Bending is formed.

According to some embodiments of the present utility model, the top of described first casing and described second casing is suitable to be provided with work Station, the bottom of described first casing and described second casing is suitable to be provided with base, and described Helmholtz closed by described workbench The top of resonant cavity and the bottom in described base closing helmholtz resonance chamber.

According to some embodiments of the present utility model, each described Helmholtz's through hole is circular hole, and each described last of the twelve Earthly Branches nurse Hereby the order of magnitude of through hole is grade suddenly.

According to some embodiments of the present utility model, the plurality of Helmholtz's through hole is in array on described second casing Arrangement.

According to some embodiments of the present utility model, described first casing and described second casing are bent into u shape respectively.

Specifically, described second casing includes two side walls being intervally installed of left and right and is connected to described two sides wall Front end between antetheca, the rear end of wherein each described side wall is provided with the connecting portion that another described side wall extends.

According to the washing machine of this utility model second aspect, including according to the above-mentioned first aspect of this utility model be used for wash The casing of clothing machine.

Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below In become obvious, or recognized by practice of the present utility model.

Brief description

Above-mentioned and/or additional aspect of the present utility model and advantage will from reference to the description to embodiment for the accompanying drawings below Become obvious and easy to understand, wherein:

Fig. 1 is the explosive view according to this utility model embodiment for the casing of washing machine；

Fig. 2 is the schematic diagram of the first casing shown in Fig. 1 and the second casing；

Fig. 3 is the schematic diagram of the second casing shown in Fig. 2.

Reference:

100: casing；

1: workbench；2: closed plate；

31: the first casings；32: the second casings；33: helmholtz resonance chamber；

321: Helmholtz's through hole；5: base.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng The embodiment examining Description of Drawings is exemplary, is only used for explaining this utility model, and it is not intended that to of the present utility model Limit.

In description of the present utility model it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", The orientation of instruction such as " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship are based on shown in the drawings Orientation or position relationship, are for only for ease of description this utility model and simplify description, rather than the dress of instruction or hint indication Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this utility model Restriction.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In description of the present utility model, unless otherwise stated, the implication of " multiple " It is two or more.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly Connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For For those of ordinary skill in the art, concrete meaning in this utility model for the above-mentioned term can be understood with concrete condition.

Below with reference to Fig. 1-Fig. 3 description according to this utility model first aspect embodiment for washing machine (not shown) Casing 100.Casing 100 for washing machine can be used for washing machine such as rotary drum washing machine.In the application explained below In, it is used for as a example rotary drum washing machine illustrating by casing 100.Certainly, it will be understood to those skilled in the art that casing 100 Can be also used for roller washing machine etc..

As shown in Figure 1-Figure 3, according to this utility model first aspect embodiment for washing machine such as rotary drum washing machine Casing 100, including the first casing 31 and the second casing 32.

Second casing 32 is located at the inner side of the first casing 31.Here, it should be noted that direction " interior " can be understood as court To the direction at the first casing 31 center, its rightabout is defined as " outward ", that is, away from the direction at the first casing 31 center.

Second casing 32 and the first casing 31 are spaced apart from each other in inward-outward direction, the second casing 32 and the first casing 31 it Between limit helmholtz resonance chamber 33, the second casing 32 is formed with the multiple Hai Muhuo being communicated with helmholtz resonance chamber 33 Hereby through hole 321.Wherein, the sqouynd absorption lowering noise principle of the Helmholtz resonator of the first casing 31 and the second casing 32 composition is: when When sound wave passes near Helmholtz's through hole 321, the air column in Helmholtz's through hole 321 is considered as mass body, in sound wave Under pressure as piston back and forth movement, the air in helmholtz resonance chamber 33 therefore does expansion compression variation, similar to bullet The effect of spring, forms mass-spring vibration systems；Because above-mentioned vibrational system has damping, a part of acoustic energy is converted into Thermal energy consumption dissipates；When frequency of sound wave is identical with the natural frequency of Helmholtz resonator, vibrational system resonates, this space-time Gas column in Helmholtz's through hole 321 back and forth movement, friction and make acoustic energy dissipate, thus reducing the purpose of noise.First Casing 31 can be common casing 100 structure.

It is understood that for the washing machine of different type of machines, can be according to its main noise frequency range, then with Helmholtz Can be obtained by the structural parameters of the second casing 32 based on through hole 321 plate theory.Specifically, with Helmholtz's through hole 321 Based on plate theory, the method for designing specific implementation step of Helmholtz's through hole 321 structure is as follows:

Step 1, determine the main noise frequency range of washing machine according to the noise spectrum that obtains of test, using its mid frequency as The resonant frequency f of the resonance sound-absorbing structure of the first casing 31 and the second casing 32 composition_r；

Step 2, set during resonance sound-absorbing structure resonance expected maximum acoustic absorptivity as α_r, substitute into formula (2) and be calculated The relative acoustic impedance r of micropunch casing 100 structure；

Step 3, according to resonant frequency f_rWith relative acoustic impedance r, then by formula (3) and formula (7) simultaneous obtain resonance sound-absorbing knot Low-frequency limit frequency f of structure₁With high frequency limit frequency f₂, f₁～f₂Between frequency range should comprise the main noise frequency range of washing machine, Otherwise, then pass through to adjust f_rValue is to update f₁、f₂Value；Substitution formula (6) is calculated relative acoustic mass m of micropunch casing 100；

Step 4, by formula (10), (11) and (13), and substitute into the thickness t of the second casing 32, the first casing 31 and second The resonant frequency f of the distance between casing 32 d, relative acoustic impedance r and relative acoustic mass m and resonance sound-absorbing structure_r, solve To Helmholtz's through hole 321 constant λ, and then Helmholtz's through hole 321 is calculated for the second casing 32 during circular hole by formula (12) Helmholtz's through hole 321 diameter d；

Step 5, by formula (9), substitute into acoustic mass m relatively, Helmholtz's through hole 321 constant λ, Helmholtz's through hole 321 The diameter d and thickness t of the second casing 32, is calculated punching rate σ；Punching rate σ is the area of all Helmholtz's through holes 321 Sum and the surface area ratio of the second casing 32；

Step 6, the diameter d according to Helmholtz's through hole 321, the surface area of punching rate σ and the second casing 32 can calculate Obtain the number of Helmholtz's through hole 321.So that it is determined that the structural parameters of the second casing 32.

Wherein, in above-mentioned steps, formula used is as follows:

The acoustic absorptivity of Helmholtz's through hole 321 plate sound absorption structure is given by

$\mathrm{\α}=\frac{4r}{{(1+r)}^2+{\[2\mathrm{\π}fm-\cot (2\mathrm{\π}fd/c_0)\]}^2}---\left(1\right)$

In formula, c₀For the velocity of sound of in the air, d is resonant cavity depth, between the as first casing 31 and the second casing 32 Distance, m is relative acoustic mass, and r is relative specific acoustic resistance, and f is sound frequency；

The resonant frequency f of Helmholtz's through hole 321 plate sound absorption structure_rThe acoustic absorptivity at place is represented by

${\mathrm{\α}}_r=\frac{4r}{{(1+r)}^2}---\left(2\right)$

Acoustic absorptivity is α_rLimit cut-off frequency when/2 uses f respectively₁、f₂Represent；By α_r/ 2 substitute into formula (1) convolution (3), by approximately being obtained to cotangent therein

f_r ²=f₁·f₂(3)

$f_r=\frac{c_0}{2\mathrm{\π}\sqrt{{\mathrm{mdc}}_0+0.356d^2}}---\left(4\right)$

$f_1=\frac{-(1+r)+\sqrt{{(1+r)}^2+4{\mathrm{mc}}_0/d+1.424}}{4\mathrm{\π}m+1.424\mathrm{\π}d/c_0}---\left(5\right)$

$f_2=\frac{(1+r)+\sqrt{{(1+r)}^2+4{\mathrm{mc}}_0/d+1.424}}{4\mathrm{\π}m+1.424\mathrm{\π}d/c_0}---\left(6\right)$

$f_2-f_1=\frac{2{\mathrm{\πdf}}_r^2(1+r)}{c_0}---\left(7\right)$

In formula, specific acoustic resistance r relatively can be expressed as with relative acoustic mass m

$r=\frac{3.270\×{10}^{-3}}{d^2}\frac{t}{\mathrm{\σ}}{k}_r---\left(8\right)$

$m=(2.939\×{10}^{-6})\frac{t}{\mathrm{\σ}}{k}_m---\left(9\right)$

In formula, d is micropunch diameter, and t is microperforated panel thickness, and σ is punching rate, k_rAnd k_mIt is respectively acoustic resistance coefficient harmony Quality coefficient, is represented by

$k_r=\sqrt{1+\frac{{\mathrm{\λ}}^2}{32}}+\frac{\sqrt{2}\mathrm{\λ}}{8}\frac{d}{t}---\left(10\right)$

$k_m=1+\sqrt{\frac{2}{18+{\mathrm{\λ}}^2}}+0.85\frac{d}{t}---\left(11\right)$

Wherein, λ is microperforated panel constant, can be calculated by formula (12)

$a=0.213d\sqrt{f}---\left(12\right)$

$\frac{r}{m}=\frac{50.48f}{{\mathrm{\λ}}^2}\frac{k_r}{k_m}---\left(13\right)$

According to this utility model embodiment for washing machine such as rotary drum washing machine casing 100, by using having Second casing 32 of Helmholtz's through hole 321 and helmholtz resonance chamber 33 can form helmholtz resonance sound absorption structure, from And reach the purpose of sqouynd absorption lowering noise.

According to some embodiments of the present utility model, between the corresponding open end of the first casing 31 and the second casing 32 respectively Closed by closed plate 2.For example, as shown in figure 1, the top and bottom of the first casing 31 and the second casing 32 are opened wide respectively, the It is tightly connected by closed plate 2 between the upper end of the upper end of one casing 31 and the second casing 32, now this closed plate 2 can be formed It is the shape (i.e. u shape) that the interval between upper end and the upper end of the second casing 32 with the first casing 31 is adapted, similarly, the It is tightly connected also by closed plate 2 between the lower end of the lower end of one casing 31 and the second casing 32, now this closed plate 2 can also Be formed as the shape (i.e. u shape) that the interval between the upper end with the first casing 31 and the upper end of the second casing 32 is adapted.Now Closed plate 2 is separate part individually machine-shaping.

Further, closed plate 2 is by the corresponding open end bending of at least one of the first casing 31 and the second casing 32 Formed (not shown).For example, the upper end of the first casing 31 can have flange (now this flange constitutes closed plate 2), and this turns over While being connected to close helmholtz resonance chamber with the second casing 32 by the upper end fold inward extending inwardly to of the first casing 31 33 top.When flange is formed on the second casing 32, the molding mode of this flange is formed on the first casing 31 with above-mentioned Flange be substantially the same, will not be described here.

According to other embodiments of the present utility model, the top of the first casing 31 and the second casing 32 can be adapted to set There is workbench 1, the bottom of the first casing 31 and the second casing 32 is suitable to be provided with base 5, workbench 1 and base 5 seal respectively completely Close top and the bottom of the first casing 31 and the second casing 32, meanwhile, the top in helmholtz resonance chamber 33 closed by workbench 1 Portion and the bottom in base 5 closing helmholtz resonance chamber 33.Closed plate 2 or flange now need not be arranged to close Helmholtz altogether Shake chamber 33.

According to some embodiments of the present utility model, each Helmholtz's through hole 321 is circular hole, and each Helmholtz is led to The order of magnitude in hole 321 is grade, and now the size of Helmholtz's through hole 321 is very little.It is understood that Helmholtz is led to The shape in hole 321 can also be oval, Long Circle or polygon etc..

According to some embodiments of the present utility model, multiple Helmholtz's through holes 321 are in that array is arranged on the second casing 32 Cloth.For example, as shown in Figures 2 and 3, multiple Helmholtz's through holes 321 become multiple rows of multiple row uniformly to arrange on the second casing 32.Can To be understood by, arrangement mode on the second casing 32 for the Helmholtz's through hole 321 can be according to the actual noise reduction that can reach Effect is specifically arranged, preferably to meet actual requirement.

According to some embodiments of the present utility model, as shown in Figure 1-Figure 3, the first casing 31 and the second casing 32 are rolled over respectively U forming, the now rear open of the first casing 31 and the second casing 32, seal up a door (not shown) with after installing, convenient to washing Part in clothing machine is installed and is keeped in repair.

Specifically, as shown in figure 3, the second casing 32 includes two side walls being intervally installed of left and right and is connected to two Antetheca between the front end of side wall, the rear end of wherein each side wall is provided with the connecting portion that another side wall extends.Thus, lead to Cross setting connecting portion, facilitate the connection of the second casing 32 and miscellaneous part (sealing up a door after such as).

According to this utility model embodiment for washing machine such as rotary drum washing machine casing 100, based on Principles of Acoustics And there is decrease of noise functions, can be with the noise suppressed problem in effectively solving washing machine such as rotary drum washing machine.

According to the washing machine such as rotary drum washing machine of this utility model second aspect embodiment, including according to this utility model The casing 100 for washing machine of above-mentioned first aspect embodiment.

Other of washing machine according to this utility model embodiment such as rotary drum washing machine constitute and operate for ability It is all known for the those of ordinary skill of domain, be not detailed herein.

In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means specific features, the knot describing with reference to this embodiment or example Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or Person's feature can combine in any one or more embodiments or example in an appropriate manner.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that: Multiple changes, modification, replacement can be carried out to these embodiments in the case of without departing from principle of the present utility model and objective And modification, scope of the present utility model limits by claim and its equivalent.

Claims (9)

1. a kind of casing for washing machine is it is characterised in that include:

First casing；With

Second casing, described second casing is located at the inner side of described first casing, described second casing and described first casing it Between limit helmholtz resonance chamber, described second casing is formed with the multiple last of the twelve Earthly Branches nurses being communicated with described helmholtz resonance chamber Hereby through hole suddenly.

2. the casing for washing machine according to claim 1 is it is characterised in that described first casing and described second case Closed by closed plate respectively between the corresponding open end of body.

3. the casing for washing machine according to claim 2 is it is characterised in that described closed plate is by described first casing Corresponding open end bending with least one of described second casing is formed.

4. the casing for washing machine according to claim 1 is it is characterised in that described first casing and described second case The top of body is suitable to be provided with workbench, and the bottom of described first casing and described second casing is suitable to be provided with base, described work Platform closes the top in described helmholtz resonance chamber and described base closes the bottom in helmholtz resonance chamber.

5. the casing for washing machine according to any one of claim 1-4 is it is characterised in that each described Hai Muhuo Hereby through hole is circular hole, and the order of magnitude of each described Helmholtz's through hole is grade.

6. the casing for washing machine according to claim 1 is it is characterised in that the plurality of Helmholtz's through hole is in institute State and be arranged in array on the second casing.

7. the casing for washing machine according to claim 1 is it is characterised in that described first casing and described second case Body is bent into u shape respectively.

8. the casing for washing machine according to claim 7 is it is characterised in that described second casing includes left and right each other Antetheca between spaced two side walls and the front end being connected to described two sides wall, the wherein rear end of each described side wall It is provided with the connecting portion that another described side wall extends.

9. a kind of washing machine is it is characterised in that include the case for washing machine according to any one of claim 1-8 Body.