CN116783434A

CN116783434A - Refrigerator with a refrigerator body

Info

Publication number: CN116783434A
Application number: CN202280012959.XA
Authority: CN
Inventors: 王海盈; 周辉; 李奎宝; 高青梅
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-06-11
Filing date: 2022-02-28
Publication date: 2023-09-19

Abstract

According to an embodiment of the present disclosure, a refrigerator includes an exciter; the shell is internally provided with a storage area; the shell comprises a heat preservation layer, a first shell and a second shell, and the first shell and the second shell are respectively attached to the inner side and the outer side of the heat preservation layer; the heat preservation layer is internally provided with a containing part, the second shell covers the opening of the containing part, the exciter is arranged in the containing part and connected with the second shell and used for driving the second shell to vibrate and sound.

Description

Refrigerator with a refrigerator body

Cross Reference to Related Applications

The application is required to be filed on the 11 th day of 2021, 06 th month and the application number is 202110657398.6; the application number is 202110656586.7 and is submitted at 2021, 06 and 11; the application number is 202110656587.1 and is submitted at 2021, 06 and 11; priority number 202121316971.9, filed on 11/06/2021, is incorporated herein by reference in its entirety.

Technical Field

The disclosure relates to the technical field of sound production equipment, in particular to a refrigerator.

Background

Refrigerators are household appliances commonly used in people's lives for maintaining foods or other objects in a constant low temperature state.

The refrigerator includes heat preservation and sets up first casing, the second casing of the inside and outside both sides of heat preservation, and the heat preservation is used for making the inside temperature of refrigerator maintain in predetermineeing the within range, and first casing pastes and establishes on heat preservation internal face to enclose into the storing district of holding food etc. the second casing pastes and establishes outside the heat preservation for form the protection to the refrigerator. The refrigerator also comprises a display panel and a loudspeaker, wherein the loudspeaker is connected with the display panel or the second shell, a sound outlet hole penetrating through the loudspeaker is formed in the second shell, and sound emitted by the loudspeaker can pass through the sound outlet Kong Chuanbo so as to be listened by a user or realize voice interaction between the user and the refrigerator.

However, the sound outlet is exposed to the air, and the dustproof and waterproof functions of the speaker cannot be realized.

Content of the application

According to an embodiment of the present disclosure, a refrigerator includes: an actuator assembly including at least one actuator; the shell is internally provided with a storage area; the shell comprises a heat preservation layer, a first shell and a second shell, and the first shell and the second shell are respectively attached to the inner side and the outer side of the heat preservation layer; the heat preservation layer is internally provided with a containing part, the second shell covers the opening of the containing part, the exciter is arranged in the containing part and connected with the second shell and used for driving the second shell to vibrate and generate sound waves.

Namely, the embodiment of the disclosure drives the second shell to vibrate and sound through the exciter, the second shell is not required to be provided with a sound outlet, the exciter is not exposed in the air, the tightness of the second shell is good, and the second shell has good dustproof and waterproof performances. At the same time, the planar sound production has a greater sound pressure level and a flatter frequency response relative to the loudspeaker sound production.

According to an embodiment of the present disclosure, a refrigerator includes: an exciter; the box body is used for storing articles; the box body comprises a heat preservation layer, a first shell and a second shell, wherein the first shell and the second shell are respectively positioned at the inner side and the outer side of the heat preservation layer; the heat preservation towards one side of second casing is formed with the protection chamber, the second casing closing cap the opening in protection chamber, the exciter is located the protection intracavity, just the exciter with the second casing links to each other, is used for driving the second casing vibration and generate sound wave.

According to an embodiment of the present disclosure, a refrigerator includes: an actuator assembly including a first actuator and a second actuator; the box body is internally provided with a storage area; the box body comprises a heat preservation layer, a first shell and a second shell, wherein the first shell and the second shell are respectively stuck to the inner side and the outer side of the heat preservation layer; the heat insulation layer is provided with a first concave part and a second concave part, the first concave part and the second concave part are arranged at intervals, the first exciter is positioned in the first concave part, and the second exciter is positioned in the second concave part; the second shell covers the opening of the first concave part and the opening of the second concave part respectively, a part of the second shell corresponding to the first concave part forms a first vibration part, and a part of the second shell corresponding to the second concave part forms a second vibration part; the first exciter is connected with the first vibration part and is used for driving the first vibration part to vibrate and sound, and the second exciter is connected with the second vibration part and is used for driving the second vibration part to vibrate and sound; and the loudness difference of the sound wave emitted by the first vibration part and the sound wave emitted by the second vibration part at each octave is smaller than 3dB.

According to an embodiment of the present disclosure, a refrigerator includes: the box body comprises an inner container, a protective shell and a heat insulation piece, wherein the heat insulation piece is arranged between the inner container and the protective shell, the heat insulation piece is provided with a concave part, and an opening of the concave part is sealed through the protective shell; the heat transfer element is connected with the protective shell; the exciter comprises a voice coil capable of vibrating, the voice coil is connected with the heat transfer element, so that the vibration of the voice coil is transferred to the protecting shell and drives the protecting shell to vibrate and sound, and the heat generated by the voice coil can be conducted onto the protecting shell through the heat transfer element.

Drawings

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a structure of the refrigerator of FIG. 1 when a second housing has a smaller thickness;

FIG. 3 is a schematic view showing a structure of the refrigerator of FIG. 1 when a second housing has a larger thickness;

fig. 4 to 7 are schematic structural views of a receiving part according to an embodiment of the present disclosure;

8-12 are schematic structural diagrams of an actuator that is an electromagnetic actuator according to embodiments of the present disclosure;

fig. 13 to 14 are schematic structural views of an electromagnetic actuator driving a second housing to vibrate according to an embodiment of the present disclosure;

Fig. 15 is a schematic structural view of another refrigerator according to an embodiment of the present disclosure;

fig. 16-23 are cross-sectional views of an actuator position of a refrigerator according to an embodiment of the present disclosure;

FIG. 24 is a schematic view of the portion A of FIG. 17;

FIG. 25 is a schematic view of the second housing of FIG. 15;

FIG. 26 is a schematic view of the portion B of FIG. 23;

fig. 27 is a schematic structural view of another refrigerator according to an embodiment of the present disclosure;

FIG. 28 is a plot of the frequency response of the sound from the first driver and the sound from the second driver of FIG. 27;

fig. 29 to 36 are schematic structural views of a second recess in a refrigerator according to an embodiment of the present disclosure;

fig. 37 to 39 are system architecture diagrams of a refrigerator according to an embodiment of the present disclosure;

fig. 40 to 41 are schematic structural views of a refrigerator according to an embodiment of the present disclosure;

fig. 42 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure, in which a first actuator and a second actuator include voice coils;

FIG. 43 is a schematic view of the actuator of FIG. 42;

FIGS. 44-45 are schematic views of the structure of the support of FIG. 43;

FIG. 46 is a cross-sectional view of the support of FIGS. 44 and 45;

FIGS. 47-48 are schematic views of the second housing of FIG. 42 with a reinforcing plate;

FIG. 49 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of FIG. 47;

fig. 50 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure;

FIG. 51 is a schematic view of the actuator of FIG. 50 coupled to a protective housing;

FIG. 52 is a schematic diagram of the actuator of FIG. 51;

FIGS. 53-54 are schematic structural views of the support of FIG. 52;

FIG. 55 is a cross-sectional view of the support of FIGS. 53 and 54;

FIGS. 56-57 are schematic views of the structure of the protective housing of FIG. 50 with reinforcing plates thereon;

FIG. 58 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of FIG. 56;

fig. 59 to 60 are schematic views illustrating a structure of the refrigerator of fig. 50 in which a heat dissipation path is provided.

Reference numerals:

110: an exciter; 111: an electromagnetic actuator; 1111: a voice coil; 1112: a magnetic conductive member; 1113: a heat conductive member; 120: a housing; 121: a heat preservation layer; 1211: an accommodating portion; 12111: a bottom wall surface; 1212: a boss; 1213: a first cavity; 1214: a second cavity; 122: a first housing; 123: a second housing; 124: a body; 125: opening and closing a door; 130: a reinforcing plate; l (L) ₁ : avoidance gap; 210: a case; 211: a recessed portion; 212: a heat preservation layer; 213: a first housing; 214: a third housing; 220: a second housing; 221: a second housing body; 222: a damping layer; 230: an elastic member; 231: a bending part; 240: an exciter; 250: a reinforcing member; 260: a protective cavity; l (L) ₂ : an assembly gap; x: a vibration direction; 31: a refrigerator; 311: a first exciter; 312: a second exciter; 3121: a voice coil; 3122: a flick wave; 313: a third exciter; 314: a woofer; 320: a case; 321: a heat preservation layer; 3211: a second concave portion; 3212: a heat dissipation channel; 322: a first housing; 323: a second housing; 3231: a second vibration part; 324: a first switch door; 325: a second switch door; 326: a display screen; 327: a control board; 330: a heat transfer member; 340: a support; 341: a plug-in part; 342: a communication section; 350: a sound board; 351: a sound board body; 352: a heat conduction part; 353: a core material; 361: a first high pass filter; 362: a first low pass filter; 363: a second high pass filter; 364: a second low pass filter; 365: a first summing module; 366: a first delay module; 367: a second summing module; 368: a third summing module; 3691: a first amplifier; 3692: a second amplifier; 371: a third high pass filter; 372: a third low pass filter; 373: a fourth high pass filter; 374: a fourth low pass filter; 375: a fourth summing module; 3761: a third amplifier; 3762: a fourth amplifier; 3763: a fifth amplifier; 381: a fifth high pass filter; 382: a fifth low pass filter; 383: a sixth high pass filter; 384: a sixth low pass filter; 385: a fifth summation module; 3861: a sixth amplifier; 3862: a seventh amplifier; 3863: an eighth amplifier; 410: a case; 411: an inner container; 412: a protective shell; 413: a heat insulating member; 4131: a recessed portion; 4132: a heat dissipation channel; 420: a heat transfer member; 430: an exciter; 431: a voice coil; 432: a flick wave; 440: a support; 441: a plug-in part; 442: a communication section; 450: a sound board; 451: a sound board body; 452: a heat conduction part; 453: a core material.

Detailed Description

In order to avoid exposing the sound outlet to the environment, the speaker cannot be provided with a waterproof and dustproof protection function. According to the refrigerator disclosed by the embodiment of the invention, the exciter is arranged on one side of the heat insulation layer, which is close to the second shell, and the exciter can drive the second shell to vibrate and sound when working. Therefore, the surface vibration sounding of the refrigerator is realized under the condition that the integrity of the second shell is not damaged, the protection performance is better, and the sound pressure level of sound is higher.

Fig. 1 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure. Fig. 2 is a schematic view of a structure of the refrigerator of fig. 1 when a second housing has a smaller thickness. Fig. 3 is a schematic view of a structure of the refrigerator of fig. 1 in which a second case has a larger thickness.

Referring to fig. 1 to 3, a refrigerator according to an embodiment of the present disclosure includes an exciter assembly including at least one exciter 110; the shell 120, there are storage areas in the shell 120; the shell 120 comprises a heat insulation layer 121, a first shell 122 and a second shell 123, wherein the first shell 122 and the second shell 123 are respectively attached to the inner side and the outer side of the heat insulation layer 121; the insulating layer 121 is provided with a receiving portion 1211, the second housing 123 covers an opening of the receiving portion 1211, the exciter 110 is disposed in the receiving portion 1211, and the exciter 110 is connected to the second housing 123, for driving the second housing 123 to vibrate and generate sound waves.

In some embodiments, the refrigerator is a refrigeration appliance for maintaining a constant low temperature state of food or other items. The storage area may include a refrigerated area and a frozen area.

The housing includes an insulating layer 121, a first housing 122, and a second housing 123. The insulating layer 121 may be formed by foaming polyurethane, and the material and molding process of the insulating layer 121 are not limited in the embodiments of the present disclosure. The first casing 122 and the second casing 123 are respectively attached to the inner side and the outer side of the heat insulation layer 121, the first casing 122 can be made of plastic, the second casing 123 can be made of metal, such as stainless steel, aluminum, etc., and the strength is high, and the service life is long. In some embodiments, the material of the second housing 123 may also be glass, polycarbonate, carbon fiber or other composite materials.

The refrigerator further includes an exciter 110 for driving the second housing 123 to vibrate and sound. Wherein the refrigerator is generally of a cube-shaped structure, the exciter 110 may be provided on either side of the refrigerator.

In some embodiments, the housing 120 includes a body 124 and a switch door 125, the storage area is disposed on the body 124, the switch door 125 is configured to cover the storage area; the receiving portion 1211 is provided on the body 124 and/or the opening and closing door 125. Of course, when the storage area includes the refrigerating area and the freezing area, the number of the switch doors 125 is two.

In this case, the actuator 110 may be provided on the body 124 or on the opening/closing door 125.

In some embodiments, the number of exciters 110 is multiple, and multiple exciters 110 may form a stereo system that optimizes the user's use experience. When the number of the actuators 110 is plural, the actuators 110 may be provided on the body 124 and the switch door 125 at the same time.

In some embodiments, the insulating layer 121 is provided with a receiving portion 1211, an opening of the receiving portion 1211 faces the second housing 123, and the actuator 110 is disposed in the receiving portion 1211. The projection shape of the receiving portion 1211 on the second housing 123 may be a relatively regular geometric shape such as a rectangle, a circle, an ellipse, a triangle, or other irregular geometric shapes.

In some embodiments, the recess depth of the accommodating portion 1211 may be smaller than the thickness of the insulating layer 121, so that the side of the accommodating portion 1211 facing the first housing 122 still has the insulating layer 121 with a certain thickness, so as to avoid the low temperature inside the refrigerator from being dissipated through the accommodating portion 1211, and the insulating effect of the refrigerator is better.

The second housing 123 covers the opening of the accommodating portion 1211, the portion of the second housing 123 connected to the insulating layer 121 remains in a fixed state, the portion of the second housing 123 corresponding to the opening of the accommodating portion 1211 forms a vibrating member, and the exciter 110 can drive the portion of the second housing 123 to vibrate and sound.

Thus, the embodiments of the present disclosure do not open holes in the second housing 123, do not compromise the integrity of the second housing 123, and the second housing 123 has good sealing and shielding properties for the insulation 121, the actuator 110, and the like. And the surface vibration sounding has larger sound pressure level and flatter frequency response and better tone quality compared with the sounding of a loudspeaker.

In some embodiments, the refrigerator further comprises a decoding module, an amplifier, a transducer, a controller and a bluetooth module or a WiFi module, wherein the bluetooth module or the WiFi module is used for receiving audio data information of a mobile phone, a computer and the like, the decoding module decodes stereo audio signals, the amplifier is connected with the bluetooth module or the WiFi module, the stereo audio signals decoded by the decoding module can be amplified through the amplifier, and the amplified stereo audio signals can be transmitted into the transducer to realize conversion of electric signals and acoustic signals.

In some embodiments, the inner wall surface of the receiving portion 1211 may be a smoother wall surface.

As can be seen from the above embodiments, the opening of the accommodating portion 1211 is closed by the second housing 123, and the accommodating portion 1211 is a closed space. In this way, part of sound generated by vibration of the second housing 123 is reflected multiple times in the receiving portion 1211, and forms spurious sounds.

Fig. 4 is a schematic structural view of the accommodating portion in fig. 1 to 3. Fig. 5 is a schematic structural diagram of the accommodating portion in fig. 1 to 3. Fig. 6 is a schematic structural view of the accommodating portion in fig. 1 to 3. Fig. 7 is a schematic structural diagram of the accommodating portion in fig. 1 to 3.

Referring to fig. 4 to 7, in some embodiments, an inner wall surface of the accommodating portion 1211 is provided with a concave-convex structure for reflecting the sound wave propagating therein for multiple times. Therefore, the sound wave is disturbed to propagate through the concave-convex structure, so that the sound wave is reflected for multiple times in the concave-convex structure, the energy of the sound wave can be consumed, and the effect of eliminating spurious tones is achieved.

In some embodiments, when the shapes of the receiving portions 1211 are different, the receiving portions 1211 have different inner wall surfaces. Illustratively, when the receiving portion 1211 is a spherical recess, the inner wall surface of the receiving portion 1211 is a spherical wall surface. When the receiving portion 1211 is a cylindrical recess, the receiving portion 1211 has a plurality of connected inner wall surfaces.

In some embodiments, the accommodating portion 1211 is exemplified by a cylindrical recess, and the cross-sectional shape of the accommodating portion 1211 is rectangular, and at this time, the accommodating portion 1211 has four side wall surfaces and one bottom wall surface 12111. Then, the concave-convex structure may be distributed on the four side wall surfaces and the bottom wall surface 12111 at the same time, or may be provided on the four side wall surfaces alone (as shown in fig. 4 and 5), or may be provided on one of the side wall surfaces of the receiving portion 1211 alone (as shown in fig. 7).

In some embodiments, the concave-convex structure may be a hole-like structure formed by recessing on the inner wall surface of the receiving portion 1211, and the hole-like structure is a plurality of hole-like structures.

In some embodiments, the concave-convex structure includes a plurality of convex portions 1212, and the plurality of convex portions 1212 are spaced apart and protrude from an inner wall surface of the receiving portion 1211. The shape of the convex portion 1212 may be a cylindrical protrusion, or a combination of shapes, and the structure is simple and easy to form.

In some embodiments, referring to fig. 4 and 5, the plurality of protrusions 1212 are distributed on a circumferential sidewall surface of the receiving portion 1211, or referring to fig. 7, the plurality of protrusions 1212 are distributed on one of the circumferential sidewall surfaces of the receiving portion 1211.

In some embodiments, the receiving portion 1211 includes a plurality of cavities, the plurality of cavities being in communication with one another, the plurality of cavities having different cavity volumes.

The number of the cavities can be set according to a preset frequency range of sound, and the cavities can be arranged along a certain direction or are annularly arranged along a circumferential direction.

Referring to fig. 6 and 7, the embodiment of the disclosure is illustrated in which the accommodating portion 1211 includes two cavities, i.e., a first cavity 1213 and a second cavity 1214, respectively, and the actuator 110 may be disposed in the first cavity 1213 or the second cavity 1214.

When the receiving portion 1211 is a cylindrical groove, the depth of the first cavity 1213 and the depth of the second cavity 1214 are the same, and the cavity volumes of the first cavity 1213 and the second cavity 1214 are different, which is represented by the difference in the cross-sectional area of the first cavity 1213 and the cross-sectional area of the second cavity 1214.

Of course, when the receiving portion 1211 has other shapes, the first cavity 1213 and the second cavity 1214 may have other separation manners.

In this way, the first cavity 1213 and the second cavity 1214 may have different resonant frequencies, and when the exciter 110 drives the second housing 123 to vibrate, the first cavity 1213 and the second cavity 1214 may respectively excite sound waves of different frequencies, the resonant frequency range of the sound waves is wider, and a larger sound pressure level may be obtained in a wider frequency range.

In some embodiments, the center of the actuator 110 is spaced apart from the center of the receiving portion 1211 in a direction parallel to the second housing 123. In this way, on the one hand, the sound emitted by the second casing 123 has more resonance modes, the resonance frequency range of the sound emitted by the second casing 123 is wider, and the sound emitted by the second casing 123 can obtain a larger sound pressure level in a wider frequency range. On the other hand, the sound generated by the second housing 123 can be prevented from generating regular standing waves, and the acoustic wave distortion can be reduced.

In some embodiments, the set position of the actuator 110 may be determined by modal analysis, and embodiments of the present disclosure are not limited.

In some embodiments, the second housing 123 may have different thicknesses according to the material of the second housing 123. For example, referring to fig. 2, the thickness of the second housing 123 is typically 0.5mm-1mm when the second housing 123 is made of steel, and referring to fig. 3, the thickness of the second housing 123 is 2mm-4mm when the second housing 123 is made of glass.

It will be appreciated that as the thickness of the second housing 123 is smaller, its stiffness is smaller and the second housing 123 is more prone to deformation. In some embodiments, the reinforcing plate 130 is provided on a portion of the second housing 123 corresponding to the receiving portion 1211, and the actuator 110 is connected to the reinforcing plate 130, and the damping of the reinforcing plate 130 is greater than that of the second housing 123.

The thickness of the reinforcing plate 130 may be less than 3mm, and illustratively, the thickness of the reinforcing plate 130 in the embodiments of the present disclosure may be 2mm. The reinforcing plate 130 may be adhesively fixed to the second housing 123 by an adhesive.

In this way, by providing the reinforcing plate 130, the rigidity of the second housing 123 can be improved, and excessive deformation of the second housing 123 can be avoided. It will be appreciated that when the thickness of the second housing 123 is smaller, the damping of the second housing 123 is smaller and the stiffness is greater, so that the resonance sound of the second housing 123 tends to produce distinct peaks and valleys and a sharp audible sound. By providing the reinforcing plate 130 having a large damping, the damping of the portion of the second housing 123 corresponding to the accommodation portion 1211 is increased, and the frequency range of sound emitted from the second housing 123 can be enlarged, improving the sense of hearing.

It is well known to those skilled in the art that the quality of sound can be measured in terms of volume, pitch, timbre, etc. The sound emitted by the sandwich panel has higher amplitude and wider frequency range compared with the sound emitted by the steel plate and the glass plate, that is, the sound emitted by the sandwich panel has better tone quality compared with the sound emitted by the steel plate or the glass plate.

It will be appreciated that the actuator 110 has a magnetic member, and that the distance between the actuator 110 and the second housing 123 becomes larger after the reinforcing plate 130 is provided. In this way, when the material of the second housing 123 is a magnetic metal such as iron, the magnetic attraction force between the second housing 123 and the actuator 110 can be reduced, and the vibration of the actuator 110 can be prevented from being affected by the magnetic attraction force between the second housing 123 and the actuator 110.

Considering that the portion of the second housing 123 corresponding to the opening of the receiving portion 1211 may vibrate with the reinforcing plate 130, while the portion of the second housing 123 connected to the heat insulating layer 121 is fixed, the reinforcing plate 130 may be disposed at a central position of the opening of the receiving portion 1211.

In some embodiments, a relief gap L is provided between the edge of the reinforcing plate 130 and the edge of the opening of the receiving portion 1211 ₁ Avoidance gap L ₁ Is disposed along the circumferential direction of the reinforcing plate 130. Illustratively, the avoidance gap L ₁ May have a width of 5mm to 15mm.

In some embodiments, the relief gap L at each location along the circumference of the reinforcement plate 130 ₁ The widths of (2) may be the same or different. For example, referring to fig. 4, 5 and 7, when the concave-convex structure is provided on the side wall surface of the accommodation portion 1211, the clearance L is avoided ₁ The width of (c) will increase or decrease correspondingly with the relief structure.

With respect to the manner in which the reinforcing plate 130 is attached to the inner wall surface of the accommodation portion 1211, the escape clearance L in the embodiment of the present disclosure ₁ Is larger than the clearance L between the second casing 123 and the avoidance line ₁ The corresponding portions may constitute a transition region and vibrate with the reinforcing plate 130 to prevent the second housing 123 from being broken by a large shearing force, and the service life of the second housing 123 is long.

In some embodiments, the reinforcing plate 130 is any one of a honeycomb sandwich panel, a foam sandwich panel, a wood sandwich panel, and an acrylic panel, which is low cost and easy to obtain.

The honeycomb sandwich board can be aluminum honeycomb sandwich board, aramid fiber honeycomb sandwich board and the like, the foam sandwich board can be polyvinyl chloride (Polyvinyl chloride, PVC) foam sandwich board, polymethacrylimide (PMI) foam sandwich board and the like, and the wood sandwich board can be balsa wood such as bassa wood and the like.

When the reinforcing plate 130 is a sandwich plate, it includes a core layer and protective layers attached to two sides of the core layer, and the two outer protective layers may be made of glass fiber cloth, carbon fiber cloth, paper, plastic, etc. The reinforcement plate 130 may increase the rigidity and strength of the second housing 123, improve the damping of the second housing, and thus improve sound quality.

Fig. 8 is a schematic diagram of the structure of the electromagnetic actuator in fig. 1. Fig. 9 is a second schematic structural diagram of the electromagnetic actuator shown in fig. 1. Fig. 10 is a schematic diagram III of the structure of the electromagnetic actuator shown in fig. 1.

Referring to fig. 1 to 3 and fig. 8 to 10, in some embodiments, referring to fig. 2, 3 and 8, a bottom wall surface 12111 of the accommodating portion 1211 is a plane, which may be a plane parallel to the second housing 123 or a plane disposed at an angle with respect to the second housing 123, so that the accommodating portion 1211 has a larger accommodating space. Considering that the shape of the actuator 110 is irregular, in some embodiments, referring to fig. 9 and 10, the bottom wall surface 12111 of the accommodating portion 1211 is adapted to the shape of the actuator 110, that is, different dimensions of different positions of the actuator 110 along the vertical direction of the second housing 123, the bottom wall surface 12111 of the accommodating portion 1211 may correspondingly protrude toward one side of the second housing 123, so that the thickness dimension of the insulating layer 121 at the position corresponding to the accommodating portion 1211 is larger, and the insulating effect of the insulating layer 121 is better.

In some embodiments, the actuator 110 may be fixedly connected to the second housing 123, where a gap is provided between the actuator 110 and the bottom wall 12111 to avoid the actuator 110 colliding with the insulating layer 121 during vibration of the actuator 110, where the gap may be 2mm-5mm. In some embodiments, the actuator 110 may also be fixedly connected to the insulating layer 121.

In some embodiments, the actuator 110 is any one of an electromagnetic actuator 111, a magnetostrictive actuator, and a piezoelectric actuator, which is highly adaptable.

In some embodiments, when the actuator 110 is the electromagnetic actuator 111, the actuator 110 is connected to the second housing 123, and the actuator 110 is spaced from the bottom wall surface 12111 of the housing 1211. In this way, the vibration mass of the exciter 110 can be used to drive the second housing 123 to vibrate, the amplitude of the second housing 123 is larger, and the sound pressure level of the sound emitted by the second housing 123 is higher.

Meanwhile, the weight of the electromagnetic actuator 111 is greater than the weight of the portion of the second housing 123 corresponding to the opening of the accommodation portion 1211. Thus, when the electromagnetic exciter 111 is fixedly connected with the second housing 123 as a whole, the equivalent vibration mass of the second housing 123 is increased, which is helpful for the second housing 123 to excite low-frequency sound, and meets the low-frequency sound design requirement of the sound generating device.

Fig. 13 is a schematic diagram of a structure of the electromagnetic actuator in fig. 10 when driving the second housing to vibrate. Fig. 14 is a second schematic structural diagram of the electromagnetic actuator in fig. 10 when driving the second housing to vibrate. Fig. 11 is a schematic diagram of a fourth configuration of the actuator in fig. 1 when the actuator is an electromagnetic actuator. Fig. 12 is a schematic diagram of the electromagnetic actuator shown in fig. 1.

Referring to fig. 11 to 14, in some embodiments, the electromagnetic actuator 111 includes a voice coil 1111, a first magnetic member and a magnetic conductive member 1112, where the voice coil 1111 and the magnetic conductive member 1112 are fixedly connected to the second housing 123, and the magnetic conductive member 1112 can move relative to the voice coil 1111 in a magnetic field generated by the first magnetic member and drive the second housing 123 to vibrate and sound.

The magnetic conductive member 1112 may be U-iron or T-iron, etc. as known to those skilled in the art. The voice coil 1111 and the magnetic conductive member 1112 can be adhered and fixed to the second housing 123 by adhesive members, so that the connection stability is high, and collision between the voice coil 1111 and the second housing 123 is avoided.

In some embodiments, when the reinforcing plate 130 is disposed in the second housing 123, the voice coil 1111 and the magnetic conductive member 1112 are fixedly connected to the reinforcing plate 130.

Considering that the voice coil 1111 generates heat when the electromagnetic actuator 111 is operated, in order to facilitate heat dissipation of the voice coil 1111, referring to fig. 11, in the embodiment of the disclosure, a hole may be formed at a position of the reinforcing plate 130 corresponding to the voice coil 1111, and a heat conducting member 1113 is disposed in the hole, and the heat conducting member 1113 is fixedly connected to the reinforcing plate 130 and attached to the second housing 123. When the actuator 110 is fixed to the reinforcing plate 130, the voice coil 1111 is fixedly coupled to the heat conductive member 1113. The heat conductive member 1113 may be made of metal or the like.

Thus, heat generated from the voice coil 1111 can be transferred to the heat conductive member 1113, and transferred to the second housing 123 through the heat conductive member 1113. And since the second housing 123 is in contact with the outside air, the second housing 123 may be heat-exchanged with the air and cooled to achieve cooling of the voice coil 1111.

In some embodiments, to facilitate cooling of the voice coil 1111, the second housing 123 may be made of metal to increase the heat exchange speed between the heat conductive member 1113 and the second housing 123.

In some embodiments, referring to fig. 12, the length of the voice coil 1111 may be increased to facilitate heat dissipation of the voice coil 1111, and the voice coil 1111 may pass through the through hole of the reinforcing plate 130 and be fixedly connected to the second housing 123, so that the voice coil 1111 may directly exchange heat with the second housing 123 with a higher heat exchange rate.

In some embodiments, when the actuator 110 is a magnetostrictive actuator, the actuator 110 is fixedly connected to the insulating layer 121, the stability of the actuator 110 is high, and by fixing the magnetostrictive actuator on the insulating layer 121, the insulation effect can be prevented from being reduced due to the fact that the depth of the accommodating portion 1211 is too large, resulting in a smaller thickness of the insulating layer 121.

In some embodiments, the magnetostrictive actuator comprises: a second magnetic member; the coil is used for generating an alternating magnetic field according to the control signal; the telescopic piece can generate telescopic deformation along the axial direction of the coil in the superimposed magnetic field of the alternating magnetic field and the magnetic field generated by the magnet; the telescopic piece is connected with the second shell 123 to drive the second shell 123 to reciprocate; wherein, the reciprocating direction of the second housing 123 is disposed at an angle with the axial direction of the coil.

Wherein, the coil is the tube-shape, and second magnetic part and extensible member can set up in the coil. And in order to facilitate the relative movement between the telescopic member and the coil, an assembly gap is provided between the coil and the telescopic member.

In some embodiments, the second magnetic member and the telescopic member may be respectively plural and sequentially arranged in the axial direction of the coil as needed. The magnetostrictive actuator further comprises an actuator casing fixedly coupled to the insulating layer 121, and the coil is received within the actuator casing to form a shield for the coil, the second magnetic member, and the telescoping member. The actuator housing may be a magnetically permeable material, such as iron, steel, or the like.

The coil is connected with an external power supply, an amplifier and the like and is used for receiving a control signal and generating an alternating magnetic field according to the control signal. The second magnetic element may be a permanent magnet, etc., the magnetic field generated by the second magnetic element may be a static magnetic field, and the material of the telescopic element may be a giant magnetostrictive material, etc., which are well known to those skilled in the art. The coil, the second magnetic member, and the telescoping member may all be of the kind well known to those skilled in the art, and embodiments of the present disclosure are not limited.

The static magnetic field is used for providing a static working point for the telescopic member, the alternating magnetic field provides a dynamic working space for the telescopic member, and the expansion coefficient of the telescopic member shows periodic extension or shortening along with the periodic change of the intensity of the alternating magnetic field and the superimposed magnetic field of the static magnetic field, so as to drive the second shell 123 to vibrate.

Since the direction of reciprocation of the second housing 123 is disposed at an angle to the axial direction of the coil, the axis of the coil is not disposed perpendicular to the second housing 123, and, illustratively, the axis of the coil is disposed parallel to the second housing 123. In this way, the outer dimension of the actuator 110 in the direction of the reciprocation of the second housing 123 is approximately the radial dimension of the actuator 110 in the coil, and the outer dimension of the actuator 110 in the radial direction of the coil is much smaller than the dimension of the actuator 110 in the axial direction of the coil, so that the heat insulating layer 121 can obtain the maximum thickness at a constant thickness dimension of the refrigerator in the direction of the reciprocation of the second housing 123.

In some embodiments, the housing may be a box.

In some embodiments, fig. 15 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure. Fig. 16 is a cross-sectional view of an actuator position of the refrigerator of fig. 15. Referring to fig. 15 and 16, a refrigerator according to an embodiment of the present disclosure includes a cabinet 210 and an exciter 240. The refrigerator body 210 includes a refrigerator body, in which a cavity for storing objects such as a freezing compartment, a refrigerating compartment, a temperature adjusting compartment, etc. may be formed, and an opening and closing door connected to the refrigerator body for closing the freezing compartment, the refrigerating compartment, the temperature adjusting compartment. Of course, as shown in fig. 15, the number of refrigerator doors may be three, and the refrigerator doors may be covered with a freezing compartment, a refrigerating compartment, and a temperature adjusting compartment, respectively.

The refrigerator comprises the heat preservation layer 212, the heat insulation performance of the heat preservation layer 212 is good, and heat exchange between the inside of the refrigerator and the outside of the refrigerator can be avoided, so that a freezing cabin, a refrigerating cabin and a temperature regulating cabin in the refrigerator are maintained in a preset temperature range.

The heat preservation 212 is provided with a first housing 213 inside, and the first housing 213 is respectively disposed on the refrigerator body and the switch door. The first housing 213 may be plastic or the like, is easy to clean, and is resistant to acid and alkali corrosion.

The second housing 220 is disposed outside the heat insulating layer 212, and the second housing 220 may be disposed on the refrigerator body, the switch door, or both depending on the disposition position of the actuator 240. The material of the second housing 220 may be glass, plastic, etc., and the material of the second housing 220 may be the same or different on the refrigerator body and the switch door.

In some embodiments, when the number of the actuators 240 is plural, the actuators 240 may be provided on the refrigerator body and the switch door at the same time. Illustratively, an actuator 240 is provided for each switch door, and an actuator 240 is also provided for the refrigerator body.

In some embodiments, the second housing 220 may be fixedly connected to an outer wall surface of the heat insulation layer 212, where a receiving portion (not shown) is disposed in the heat insulation layer 212, and an inner cavity of the receiving portion forms the protection cavity 260, and the exciter 240 is disposed in the receiving portion.

In some embodiments, the refrigerator further includes a third housing 214, the first housing 213 and the third housing 214 are respectively attached to the inner side and the outer side of the heat insulation layer 212, and at this time, the second housing 220 is independent from the housing 210, and a space between the second housing 220 and the third housing 214 forms a protection cavity 260.

In some embodiments, the refrigerator further includes an elastic member 230, one end of the elastic member 230 is connected to the third housing 214, the other end of the elastic member 230 is connected to the second housing 220, and an exciter 240 is connected to the second housing 220 for driving the second housing 220 to vibrate and sound with respect to the refrigerator body 210.

In this way, when the exciter 240 vibrates, the elastic member 230 can correspondingly stretch or contract along the vibration direction of the third housing 214, so as to drive the second housing 220 to vibrate and sound. That is, the refrigerator can realize surface vibration sounding, and the sound emitted by the refrigerator has relatively flat frequency correspondence.

Meanwhile, the weight of the actuator 240 is greater than that of the second housing 220. Thus, when the exciter 240 is fixedly connected with the second housing 220, the equivalent vibration mass of the second housing 220 is increased, which is helpful for the second housing 220 to excite low-frequency sound, and meets the low-frequency sound design requirement of the sound generating device.

In some embodiments, the elastic member 230 has elasticity, which may buffer the vibration of the second housing 220, and the vibration of the exciter 240 is transferred to the second housing 220 through the elastic member 230, and the second housing 220 may have a larger vibration amplitude.

In some embodiments, when the second housing 220 has a larger vibration amplitude, the amount of air pushed when the second housing 220 vibrates becomes larger, also contributing to the better low frequency sound emitted from the second housing 220.

Referring to fig. 16, in some embodiments, to form a protection for the actuator 240, a protection cavity 260 is disposed in the elastic member 230, the protection cavity 260 penetrates through two ends of the elastic member 230 along the vibration direction of the second housing 220, and the second housing 220 and the third housing 214 respectively cover the ports of the two ends of the protection cavity 260, and the actuator 240 is disposed in the protection cavity 260. In this way, the elastic member 230 can provide protection for the actuator 240 from foreign substances such as water, dust, etc. deposited on the actuator 240.

In some embodiments, the elastic member 230 may be a rubber member that is elastic and can form a shield for the actuator 240.

It is understood that the compliant range of the elastic member 230 refers to a range in which the force to which the elastic member 230 is subjected is linearly proportional to the telescopic distance thereof. When the compliance range of the elastic member 230 is exceeded, the elastic member 230 stretches less, which easily results in nonlinear distortion of the sound emitted from the second housing 220.

To improve the compliance range of the elastic member 230, the thickness of the elastic member 230 in the vibration direction X may be increased.

Fig. 17 is a second cross-sectional view of the actuator position of the refrigerator of fig. 15. Fig. 24 is a schematic view of the structure of the portion a in fig. 17.

In order to improve the compliance range of the elastic member 230, referring to fig. 17 and 24, in some embodiments, the elastic member 230 may be further bent in the vibration direction X of the second housing 220. I.e. the elastic member 230 may have a bellows-like structure.

The number of bending of the elastic member 230 may be one or more. The elastic member 230 includes a bending portion 231, and the bending portion 231 has a U-shaped or V-shaped cross-section, and two ends of the bending portion 231 are respectively connected to the third housing 214 and the second housing 220. Wherein the bending part 231 may protrude toward the outside of the shielding cavity 260.

In some embodiments, fig. 18 is a cross-sectional view three of the position of the actuator 240 of the refrigerator of fig. 15. Referring to fig. 18, the bending portion 231 may also protrude toward the inner side of the protection cavity 260.

In this way, the elastic member 230 can be deformed in a stretching manner along the vibration direction X by approaching or separating the two ends of the bending portion 231 from each other and compressing or stretching the bending portion 231 itself, so that the elastic member 230 has a larger compliance range, can allow the second housing 220 to have a larger vibration amplitude, and avoid the occurrence of nonlinear distortion of the sound emitted by the second housing 220.

In some embodiments, the surface of the elastic member 230 has an adhesive surface, and the second housing 220 and the third housing 214 are respectively adhered and fixed to the elastic member 230.

In some embodiments, the elastic member 230 may be a hydrocolloid, a textured gel, an acrylic gel, etc. with low cost.

In some embodiments, the guard cavity 260 may be a hermetically sealed cavity. To effectively increase the vibration amplitude of the second housing 220, in some embodiments, the elastic member 230 is a gas permeable member, so that the gas on both sides inside and outside the protection cavity 260 can flow through the elastic member 230.

When the second housing 220 moves toward the side close to the case 210, the volume of the shielding chamber 260 becomes smaller, and the gas in the shielding chamber 260 is pressed by the second housing 220 and flows out toward the outside of the shielding chamber 260. When the second housing 220 moves toward a side away from the case 210, the volume of the shielding chamber 260 becomes large, and the gas outside the shielding chamber 260 may flow toward the inside of the shielding chamber 260. In this way, the second housing 220 receives less air resistance, the second housing 220 can have a large vibration amplitude, and the refrigerator emits sound having a large sound pressure level.

In some embodiments, the elastic member 230 may be foam, double-sided adhesive, or the like. The foaming material piece has better elasticity and has breathable air holes so as to realize the mutual communication of air at the inner side and the outer side of the protection cavity 260. In some embodiments, the double-sided adhesive may have a compliance in the range of 0.3mm to 1mm.

In some embodiments, the second housing 220 may be a steel plate, a glass plate, or the like. It will be appreciated that when the second housing 220 is a steel or glass plate, the second housing 220 has a greater stiffness and less damping, such that the second housing 220 is prone to a sharp response at the resonant frequency.

Fig. 19 is a cross-sectional view of an actuator position of the refrigerator of fig. 15. Fig. 20 is a fifth cross-sectional view of the actuator position of the refrigerator of fig. 15. Fig. 21 is a sixth cross-sectional view of the actuator position of the refrigerator of fig. 15. Fig. 23 is a cross-sectional view seven of the actuator position of the refrigerator of fig. 15.

Referring to fig. 17 to 22 and 24, in some embodiments, the second housing 220 includes a second housing body 221 and a damping layer 222, the second housing body 221 and the damping layer 222 are attached to each other, and the damping of the damping layer 222 is greater than the damping of the second housing body 221.

By providing the damping layer 222, the damping of the second housing 220 becomes larger, and the influence of the second housing 220 on the hearing due to the influence of obvious frequency response peaks and valleys caused by resonance at the resonance frequency due to the excessively small internal damping is avoided.

In some embodiments, referring to fig. 19 and 20, the damping layer 222 may be a honeycomb sandwich panel, a foam sandwich panel, a wood sandwich panel, or an acrylic panel, which is low cost and easy to obtain. At this time, the damping layer 222 may be disposed at a side of the second housing 220 close to the actuator 240, or at a side of the second housing 220 facing away from the actuator 240.

In some embodiments, referring to fig. 19, when the damping layer 222 is disposed on a side of the second housing 220 adjacent to the actuator 240, the actuator 240 may be directly connected to the damping layer 222.

In some embodiments, referring to fig. 17, 18 and 20, a relief notch may be provided on the damping layer 222, and the exciter 240 is located in the relief notch and connected to the second housing body 221.

In some embodiments, referring to fig. 17-18 and fig. 21, 22 and 24, the damping layer 222 may be a foam material, and the damping layer 222 is illustratively polyurethane, etc. and is formed by a foaming process. At this time, the damping layer 222 may be further filled with fibers or the like to increase the damping of the damping layer 222.

In some embodiments, a foaming cavity is disposed in the second housing body 221, and the damping layer 222 is filled in the foaming cavity, so that the second housing body 221 surrounds the damping layer 222, and the strength of the second housing 220 is higher, so as to avoid the damping layer 222 from being broken.

In some embodiments, the second housing 220 has a resonance position, and when the exciter 240 drives the second housing 220 to vibrate, the resonance position of the second housing 220 resonates with the exciter 240, so that vibration amplitudes at different positions of the second housing 220 are different, and the second housing 220 emits an abnormal sound. It can be appreciated that when the exciter 240 vibrates the second housing 220, the vibration position of the second housing 220 is annular and surrounds the outer periphery of the exciter 240.

The resonance position of the second housing 220 is related to the material, structure, etc. of the second housing 220, and the resonance position of the second housing 220 may be obtained through simulation, which is not limited in the embodiments of the present disclosure.

Fig. 25 is a schematic structural view of the second housing of fig. 15. In some embodiments, referring to fig. 18 and fig. 21 to 22 and 25, the refrigerator further includes a reinforcement 250, and the reinforcement 250 is disposed at a resonance position of the second housing 220 and fixedly connected to the second housing 220, so that different positions of the second housing 220 may have approximately the same intensity, and amplitudes of the positions of the second housing 220 may be approximately the same, and the second housing 220 may be integrally translated when vibrating, thereby preventing the second housing 220 from emitting abnormal sounds.

In some embodiments, the stiffener 250 may be made of plastic, metal, or the like. Illustratively, the stiffener 250 may be aluminum, stainless steel, or the like. Depending on the material of the stiffener 250 and the second housing 220, the stiffener 250 may be fixed to the second housing 220 by bonding, welding, or the like.

In some embodiments, when the second housing 220 is a metal piece, the reinforcement 250 may also be formed by stamping.

In some embodiments, the stiffener 250 may be annular in shape and circumscribe the actuator 240. In some embodiments, the reinforcement members 250 may also be in a block shape, and the number of the reinforcement members 250 is plural, and the plural reinforcement members 250 are disposed at intervals along the circumferential direction of the actuator 240.

In some embodiments, the reinforcement member 250 is fixedly coupled to the outer wall surface of the second housing 220, and the reinforcement member 250 may be disposed at a side of the second housing 220 near the actuator 240 or a side facing away from the actuator 240. In this case, the second case 220 may be a steel plate or a glass plate.

In some embodiments, when the second housing 220 has the foaming chamber, the reinforcement 250 may be provided on the outer wall surface of the second housing body 221 (as shown in fig. 25), or the reinforcement 250 may be fixedly coupled to the inner wall surface of the foaming chamber (as shown in fig. 18).

At this time, the height of the reinforcement member 250 along the vibration direction X of the second housing 220 is less than or equal to the cavity height of the foaming cavity along the vibration direction X of the second housing 220, i.e. the reinforcement member 250 is prevented from damaging the integrity of the second housing body 221, so as to prevent the reinforcement member 250 from affecting the strength of the second housing 220, resulting in a change of the resonance position of the second housing 220.

Fig. 23 is a cross-sectional view eight of the actuator position of the refrigerator of fig. 15. Fig. 26 is a schematic diagram of the structure of the portion B in fig. 23.

Referring to fig. 23 and 26, in some embodiments, a recess 211 is formed on an outer wall surface of the case 210, the recess 211 corresponds to the accommodating portion 211 in fig. 2, the elastic member 230 and the actuator 240 are located in the recess 211, and the second housing 220 An assembly gap L is provided between the side wall surface and the inner wall surface of the recess 211 ₂ . In this way, the second housing 220 does not collide with the inner wall surface of the recess 211 during vibration, and noise of the second housing 220 is avoided.

In some embodiments, the assembly gap L ₂ The size of (2) may be set as required, and may be, for example, 3mm to 5mm.

In some embodiments, the shape of the second housing 220 is adapted to the shape of the recess 211, which may be a plate-shaped structural member with a regular shape such as a rectangular plate, a circular plate, or other irregularly shaped structural members.

The second housing 220 may have a height difference from an outer wall surface of the case 210. In some embodiments, the second housing 220 and the outer wall surface of the case 210 are in smooth transition, so that the second housing 220 may form the outer wall surface of the case 210, the outer wall surface of the case 210 is smoother, and the appearance of the refrigerator is simpler.

In some embodiments, the resilient member 230 is coupled to a side wall surface or a bottom wall surface of the recess 211, as desired. Of course, to avoid the second housing 220 from being skewed during the vibration process, one of the recess 211 and the second housing 220 may be provided with a guide groove, and the other one is provided with a protruding guide portion, and the guide portion extends into the guide groove and is movable relative to the guide groove.

In some embodiments, the stiffener 250 may act as a guide, and correspondingly, a guide slot may be provided in the recess 211 into which the guide may extend.

In some embodiments, the case 210 has a thermal insulation layer 212, and the recess 211 has a recess depth smaller than the thickness of the thermal insulation layer 212. In this way, the thermal insulation layer 212 with a preset thickness is still provided at the position of the box 210 corresponding to the exciter 240, so that heat exchange between the low temperature gas inside the box 210 and the high temperature gas outside the box 210 is avoided, and the refrigerator still has a good thermal insulation effect.

In some embodiments, the second housing 220 constitutes an outer wall surface of the case 210. Illustratively, when the actuator 240 is disposed on the opening and closing door corresponding to the refrigerator compartment, the second housing 220 is disposed outside the third housing 214 of the opening and closing door, and the second housing 220 constitutes an outer wall surface of the opening and closing door.

In some embodiments, the second housing 220 is smoothly transited with the outer wall surface of the other switch door to prevent the switch door from protruding out of the other switch door. At this time, the thickness of the insulation layer of the switch door is smaller than that of the insulation layers of other switch doors.

Fig. 27 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure. Fig. 28 is a plot of the frequency response of the sound from the first driver and the sound from the second driver in fig. 27. Referring to fig. 27 and 28, in order to enhance the user's experience, the refrigerator may be provided with a plurality of sounding members. For example, the refrigerator may be provided with two exciters which are spaced apart to form a stereo system. For example, the refrigerator may include two switch doors, each of which is provided with an actuator. When the two exciters vibrate, the difference of parts at the installation positions of the two exciters can cause the difference of air quantity which can be pushed by the first and second exciters, so that the loudness of sound excited by the first and second exciters has larger difference at the low frequency band. For example, referring to FIG. 28, the two drivers have approximately coincident frequency response curves above 400Hz, and the frequency response curves below 400Hz differ significantly, so that the user perceives the source location of the sound as favoring drivers with greater loudness below 400 Hz. When the user is located at different positions of the refrigerator, the center of the sound source perceived by the user also changes, and the use experience is poor.

In view of this, an actuator assembly of a refrigerator in an embodiment of the present disclosure includes a first actuator and a second actuator. The loudness differences of the sounds excited by the first exciter and the second exciter at each octave are in a range which is not perceived by a human body, so that the frequency response curves of the sounds excited by the first exciter and the second exciter are approximately overlapped, a user cannot perceive the difference of the sound sizes of the first exciter and the second exciter and the sound source positions of the first exciter and the second exciter, namely the perception sensitivity of the user to the sound source positions is reduced, and the user experience is optimized.

In some embodiments, the housing may be a box.

Fig. 29 is a schematic view of a structure of a second recess in a refrigerator according to an embodiment of the present disclosure. Fig. 30 is a second schematic structural view of a second recess in a refrigerator according to an embodiment of the present disclosure.

Referring to fig. 29 and 30, a refrigerator 31 according to an embodiment of the present disclosure includes a case 320, wherein a storage area is provided in the case 320; the box 320 includes a heat insulation layer 321, a first casing 322 and a second casing 323, where the first casing 322 and the second casing 323 are respectively attached to the inner and outer sides of the heat insulation layer 321.

Fig. 40 is a schematic view of a structure of a refrigerator according to an embodiment of the present disclosure. Fig. 41 is a schematic diagram of a refrigerator according to an embodiment of the present disclosure. Referring to fig. 40 and 41, in some embodiments, the embodiments of the present disclosure are described with respect to the refrigerator 31 including four switch doors. Two of the switch doors are used for sealing the refrigerating compartment, and the other two switch doors are used for sealing the refrigerating compartment.

The second housing 323 is provided on the storage part and the opening and closing door, respectively. The second housing 323 may be made of glass, plastic, steel, etc.

In some embodiments, refrigerator 31 further comprises an actuator assembly comprising first actuator 311 and second actuator 312. In this way, the first exciter 311 and the second exciter 312 may constitute a stereo system, optimizing the user's use experience.

The first actuator 311 and the second actuator 312 may be provided at the storage part at the same time, or at the switch door at the same time. For example, referring to fig. 40 and 41, the two opening and closing doors corresponding to the refrigerator compartment include a first opening and closing door 324 and a second opening and closing door 325, and the first and second actuators 311 and 312 may be disposed on the first and second opening and closing doors 324 and 325, respectively.

In some embodiments, the first actuator 311, the second actuator 312 may be any one of a magnetostrictive actuator, an electromagnetic actuator, a piezoelectric actuator. That is, the types of the first actuator 311 and the second actuator 312 may be the same or different.

In some embodiments, the accommodating portion includes a first concave portion and a second concave portion, that is, the insulating layer 321 is provided with the first concave portion and the second concave portion 3211, the first concave portion and the second concave portion 3211 are arranged at intervals, the first exciter 311 is located in the first concave portion, and the second exciter 312 is located in the second concave portion 3211; the second housing 323 covers the opening of the first recess and the opening of the second recess 3211, respectively.

In this way, the first recess portion and the second recess portion 3211 are respectively sealed by the second casing 323 and enclose a sealed cavity, so as to avoid foreign matters such as dust, water and the like from outside being deposited on the first exciter 311 and the second exciter 312, and the service lives of the first exciter 311 and the second exciter 312 are longer.

In some embodiments, referring to fig. 29 and 30, a portion of the second housing 323 corresponding to the first recess portion constitutes a first vibration portion (not shown), and a portion of the second housing 323 corresponding to the second recess portion 3211 constitutes a second vibration portion 3231; the first exciter 311 is connected to the first vibration part for driving the first vibration part to vibrate and sound, and the second exciter 312 is connected to the second vibration part 3231 for driving the second vibration part 3231 to vibrate and sound.

The first recess portion and the second recess portion 3211 are disposed at an interval such that the first vibration portion and the second vibration portion 3231 are non-connected two portions of the second case 323. The first exciter 311 is connected with the first vibration part to drive the first vibration part to vibrate and sound, the second exciter 312 is connected with the second vibration part 3231 in a vibration mode to drive the second vibration part 3231 to vibrate and sound, namely, the refrigerator 31 vibrates and sounds through the surface, the user is relatively insensitive to the sound source perception of the surface vibration and sound, and even if the user is located at different positions of the refrigerator 31, the user cannot perceive the change of the position of the sound source, so that the use experience of the user is optimized.

In some embodiments, the first vibration portion and the second vibration portion 3231 may form two mutually independent sound sources, and the loudness differences of the sound waves emitted by the first vibration portion and the sound waves emitted by the second vibration portion 3231 at each octave are within a preset threshold range, that is, a loudness difference range 3dB where a human body cannot perceive. Wherein octaves refer to the interval between two frequencies with a frequency ratio of 2 or 1/2 on the filter characteristic curve.

It will be appreciated that, due to factors such as assembly tolerances of the devices, at certain frequency locations, it may occur that the difference in loudness between the sound waves emitted by the first vibration portion and the sound waves emitted by the second vibration portion 3231 is greater than 3dB, which is negligible.

In this way, the acoustic response curve of the first vibration portion and the acoustic response curve of the second vibration portion 3231 are approximately in a superposition state, so that the problem that the frequency response of one exciter is greater than that of the other exciter in a certain frequency range, for example, a frequency range lower than 400Hz, is avoided, and the user perceives that the acoustic response curve is large or small, and the position of the sound source is near or far.

In some embodiments, referring to fig. 27, the refrigerator 31 includes a control board 327, and the first and second actuators 311 and 312 are electrically connected to the control board 327, respectively, to control start and stop of the first and second actuators 311 and 312, etc. through the control board 327.

In some embodiments, the refrigerator 31 is further provided with a display screen 326 for displaying image information, the display screen 326 being electrically connected to a control board 327. For ease of assembly, the control panel 327, display 326, etc. will typically be centrally located where one of the actuators is located.

In some embodiments, the refrigerator 31 includes a bracket (not shown) and the bracket and the control panel 327 are both positioned in the first recess, the bracket being fixed to the first vibration part, and the control panel and the display screen being fixed to the bracket.

The bracket may have a frame structure, a plate shape, or the like. The bracket can be made of plastic, steel and the like. In some embodiments, the bracket may be fixedly coupled to the second housing 323 by means of bonding, screwing, or the like. For example, the bracket may be fixed to the second housing 323 by double-sided tape or foam.

It can be appreciated that referring to fig. 27, the second recess portion 3211 is only configured to accommodate the second actuator 312, and the first recess portion accommodates the first actuator 311, the bracket, the display screen, etc., so that a projection area of the first recess portion on the second housing 323 is larger than a projection area of the second recess portion 3211 on the second housing 323. That is, the area of the first vibration part is larger than that of the second vibration part 3231, and the first vibration part may have a larger vibration amplitude than the second vibration part 3231.

In some embodiments, to facilitate servicing and replacement of the display, control panel, etc., the portion of the second housing 323 associated with the first actuator 311 is generally removable. For example, when the first actuator 311 is fixed to the first switch door 324 in fig. 27, the second housing 323 corresponding to the first switch door 324 is detachable, and the second housing 323 may be fixed to the first housing 322 in a frame-fitting manner. That is, an air gap is provided between the second housing 323 on the first opening and closing door 324 and the insulation layer 321 on the first opening and closing door 324.

On the other hand, the first actuator 311 can drive the second housing 323 on the switch door to vibrate, the vibration area is far larger than the area of the second vibration portion 3231, and the first actuator 311 can push a larger volume of air relative to the second actuator 312. On the other hand, the air gap between the heat insulating layer 321 and the second casing 323 communicates with the first recess portion, which is equivalent to an increase in the equivalent volume of the first recess portion, and the first recess portion has a larger volume than the second recess portion 3211, and the air resistance received by the first vibration portion when vibrated is smaller than the air resistance received by the second vibration portion 3231 when vibrated.

It will be appreciated that the effect of the bass sound is positively correlated with the amount of air that the exciter can push.

In some embodiments, the first vibration portion may push a greater volume of air relative to the second vibration portion 3231 than the second vibration portion 3231, and the first vibration portion may emit a better low frequency sound relative to the second vibration portion 3231. For example, referring to fig. 28, at a low frequency range below 400Hz, the loudness of the first vibration portion on the first switch door 324 is greater than the loudness of the second vibration portion 3231 on the second switch door 325. And at a high frequency band higher than 400Hz, the frequency response curve of the first vibration part approximately coincides with the frequency response curve of the second vibration part 3231.

This also tends to cause the user to perceive a sound source biased toward the first actuator 311, and the sound heard by the user may be changed in size, so that the user may perceive a sound source that is too near or too far when the user is located at a different position of the refrigerator 31.

In some embodiments, the bass sound of the second vibration portion 3231 may be improved by improving the amount of air that the second vibration portion 3231 can push. For example, when the amounts of air that the first and second vibration portions 3231 can push are approximately the same, the first and second vibration portions 3231 can emit approximately the same low frequency sound.

It will be appreciated that the amplitude of the vibration of the first vibration portion after the mounting of the bracket, display screen, etc. is smaller than the amplitude of the vibration of the first vibration portion without the mounting of the bracket, display screen, etc.

In some embodiments, the first recess portion has a first projected area on the second housing 323, i.e., an area of the first vibration portion, and the second recess portion 3211 has a second projected area on the second housing 323, an area of the second vibration portion 3231, which is smaller than the first projected area, i.e., an area of the second vibration portion 3231 is smaller than an area of the first vibration portion.

And the second vibration portion 3231 has a larger vibration amplitude than the first vibration portion, the first and second vibration portions 3231 may push approximately the same volume of air, and the first and second vibration portions 3231 may emit approximately the same low frequency sound.

In some embodiments, the area of the second vibratory portion is 0.7-0.85 times the area of the first vibratory portion. The size relationship between the first projection area and the second projection area is related to factors such as a bracket size, a bracket weight, a display screen weight, and the like, and embodiments of the present disclosure are not limited.

In some embodiments, referring to fig. 29, the recess depths of the second recess portions 3211 are the same at different positions, i.e., the second recess portions 3211 are of a groove-like structure with equal depth, and the second recess portions 3211 are easy to form and have low manufacturing cost.

In some embodiments, referring to fig. 30, the second recess 3211 has a first recess depth at a position corresponding to the second actuator 312, and the second recess 3211 has a second recess depth at other positions, the first recess depth being greater than the second recess depth.

Thus, the second recess 3211 is stepped, and the depth of the second recess 3211 is greater at a position corresponding to the second actuator 312 and smaller at other positions of the second recess 3211. The thickness of the insulating layer 321 at the position corresponding to the second actuator 312 is smaller, and the portion of the insulating layer 321 corresponding to the other position of the second recess 3211 has a larger thickness, so that the insulating effect of the insulating layer 321 is better.

Fig. 31 is a schematic view of a third configuration of a second recess in a refrigerator according to an embodiment of the present disclosure. Fig. 32 is a schematic diagram of a second recess in a refrigerator according to an embodiment of the present disclosure.

In some embodiments, referring to fig. 31 and 32, at least one heat dissipation channel 3212 is disposed in the heat insulation layer 321, one end of the heat dissipation channel 3212 is communicated with the inner wall surface of the second recess portion 3211, and the other end of the heat dissipation channel 3212 is communicated with the top wall surface or the bottom wall surface of the heat insulation layer 321; the second housing 323 is provided with a heat dissipation hole, and the heat dissipation hole is disposed opposite to the heat dissipation channel 3212.

One end of the heat dissipation channel 3212 is communicated with the second recess portion 3211, and the other end penetrates through the outer wall surface of the heat insulation layer 321. Meanwhile, a heat dissipation hole (not shown) is formed in the second housing 323, and the heat dissipation hole is opposite to the heat dissipation channel 3212, so that the second recess portion 3211 is communicated with the outside air through the heat dissipation channel 3212, heat generated by the second exciter 312 can be conducted to the outside air through the heat dissipation channel 3212, a heat dissipation effect of the second exciter 312 is good, and reduction of vibration amplitude of the second vibration portion 3231 due to overheating of the second exciter 312 is avoided.

Meanwhile, in the vibration process of the second housing 323, the air in the second recess portion 3211 may circulate with the external air through the heat dissipation channel 3212, the air resistance of the second housing 323 is small, the vibration amplitude of the second housing 323 is large, and the sound emitted by the second vibration portion 3231 has a large sound pressure level.

In some embodiments, the number of the heat dissipation channels 3212 may be multiple, so that the communication area between the second recess portion 3211 and the external air is larger, which is conducive to dissipating more heat through the heat dissipation channels 3212, and has a better heat dissipation effect.

The heat radiating holes may be provided at any position of the second housing 323, for example, on the front side wall of the refrigerator 31. In some embodiments, the heat dissipation holes may be disposed on the top wall or the bottom wall of the second housing 323, that is, the heat dissipation holes may be hidden at the bottom or the top of the refrigerator 31, so that the user is difficult to see the heat dissipation holes from the appearance perspective during the use of the refrigerator 31, and the appearance of the refrigerator 31 is complete.

And when the heat dissipation holes are provided at the top or bottom of the refrigerator 31, the heat dissipation channels 3212 may extend in a vertical direction or in an inclined direction to achieve convection of the hot air in the second recess 3211 with the cold air outside the refrigerator 31 by using a chimney effect, thereby improving a heat dissipation rate of the second exciter 312.

It will be appreciated that when the second recess 3211 is in communication with the outside air through the heat dissipation channel 3212, the second actuator 312 is exposed to the air through the heat dissipation channel 3212, and in some embodiments, the refrigerator 31 is further provided with a first air-permeable shield (not shown) for preventing foreign objects from entering the heat dissipation channel 3212.

Wherein, the air permeability of the first ventilation protection member is better, and the ventilation protection member does not influence the mutual circulation between the hot air in the second recess portion 3211 and the cold air outside the refrigerator 31. Meanwhile, the first ventilation protection piece can also prevent external foreign matters, such as water, dust, fuzzes and the like, from entering the second concave portion 3211 through the heat dissipation channel 3212, that is, the first ventilation protection piece can form better protection for the second exciter 312.

In some embodiments, the first breathable protective member comprises a polytetrafluoroethylene layer and a textile layer, wherein the polytetrafluoroethylene layer and the textile layer are mutually attached, the polytetrafluoroethylene layer and the textile layer are good in breathability, and the textile layer can form protection for the polytetrafluoroethylene layer to avoid foreign matter from blocking the polytetrafluoroethylene layer.

In some embodiments, the first air permeable guard is removably attached to the refrigerator 31 for periodic cleaning or replacement of the first air permeable guard.

Fig. 33 is a schematic view of a second recess in a refrigerator according to an embodiment of the present disclosure. Fig. 34 is a schematic view of a second recess in a refrigerator according to an embodiment of the present disclosure. Fig. 35 is a schematic view of a structure of a second recess in a refrigerator according to an embodiment of the present disclosure.

In some embodiments, referring to fig. 33 to 35, the projection shape of the second recess portion 3211 on the second housing 323 may be a regular geometric shape, such as a rectangle, a circle or an ellipse, which is easy to be formed, and has a low manufacturing cost, and the shape of the second recess portion 3211 may be designed according to requirements as long as the projection area requirement of the second recess portion 3211 can be met.

The projection shape of the second recess 3211 on the second casing 323 may also be an irregular geometric shape. Fig. 36 is a schematic structural view eight of a second recess portion in a refrigerator according to an embodiment of the present disclosure, referring to fig. 36, the second recess portion 3211 includes a plurality of communicating cavities. In this way, the plurality of cavities are mutually communicated to form the resonant cavity, and different cavities have different resonant frequencies, so that the resonant frequency range of the sound emitted by the second vibration part 3231 is wider, and the sound emitted by the second vibration part 3231 can obtain a larger sound pressure level in a wider frequency range.

In some embodiments, referring to fig. 31 to 36, the second actuator 312 and the center of the second recess 3211 are spaced apart in a direction parallel to the second housing 323. In this way, the second vibration portion 3231 can be excited to generate a large number of resonance modes, the resonance frequency range of the sound generated by the second vibration portion 3231 is wide, and the sound generated by the second vibration portion 3231 can obtain a large sound pressure level in a wide frequency range. At the same time, the sound generated by the second vibration portion 3231 can be prevented from generating regular standing waves, and distortion of the sound can be reduced.

In some embodiments, the method may further include making the difference between the loudness of the sound wave emitted by the first vibration portion and the loudness of the sound wave emitted by the second vibration portion 3231 imperceptible to the user, so as to reduce the perceived sensitivity of the user to the sound source.

It will be appreciated that when the difference in loudness between the sound wave emitted from the first vibration portion and the sound wave emitted from the second vibration portion 3231 is greater than 3dB per octave, the following embodiment may be adopted, so that the difference in loudness between the sound wave emitted from the first vibration portion and the sound wave emitted from the second vibration portion 3231 is not perceived by the user.

Fig. 37 is a system architecture diagram of a refrigerator according to an embodiment of the present disclosure. Referring to fig. 37, in some embodiments, the low frequency sounds of the first and second drivers 311 and 312 may also be optimized by controlling the input signals of the first and second drivers 311 and 312 on the basis of fig. 27.

In some embodiments, the refrigerator 31 includes a controller; the input end of the first high-pass filter 361 is electrically connected with the controller and is used for filtering sound wave signals lower than a preset frequency; the input end of the first low-pass filter 362 is electrically connected with the controller and is used for filtering out sound wave signals with frequency higher than a preset frequency; the input end of the second high-pass filter 363 is electrically connected with the controller and is used for filtering sound wave signals lower than a preset frequency; the input end of the second low-pass filter 364 is electrically connected to the controller for filtering the acoustic wave signal with a frequency higher than a preset frequency.

The first high-pass filter 361, the first low-pass filter 362, the second high-pass filter 363, and the second low-pass filter 364 may be of any kind known to those skilled in the art, and the embodiments of the present disclosure are not limited thereto.

The preset frequency is a frequency point where the loudness difference of the sounds emitted from the first and second vibration parts 3231 is large, and may be 400Hz, for example. Thus, the first high pass filter 361 and the second high pass filter 363 may pass high frequency control signals higher than 400Hz. The first low pass filter 362 and the second low pass filter 364 may pass low frequency control signals below 400Hz.

In some embodiments, the refrigerator 31 includes a first summing module 365, and outputs of the first low pass filter 362 and the second low pass filter 364 are electrically connected to inputs of the first summing module 365, respectively.

I.e. the low frequency control signals below 400Hz passed by the first and second low pass filters 362, 364 are mixed by the first summing module 365.

The addition of the first addition module 365 may be in the form of an addition well known in the art and processed by an ARM processor or by a digital signal processor (Digital Signal Processing).

In some embodiments, the refrigerator 31 further includes a first delay module 366, an input of the first delay module 366 being electrically connected to an output of the first summing module 365; the output end of the first high-pass filter 361 and the output end of the first delay module 366 are electrically connected with the input end of the second summing module 367, and the output end of the second summing module 367 is electrically connected with the first exciter 311; the output of the third summing module 368, the output of the second high pass filter 363, and the output of the first delay module 366 are both electrically coupled to the input of the third summing module 368, and the output of the third summing module 368 is electrically coupled to the second exciter 312.

The low-frequency control signal added by the first adding module 365 is output to the first exciter 311 and the second exciter 312 in two paths, that is, the high-frequency control signal output by the second adding module 367 and the first high-pass filter 361 is added and output to the first exciter 311, and the high-frequency control signal output by the third adding module 368 and the second high-pass filter 363 is added and output to the second exciter 312.

In some embodiments, the outputs of the second and third summing modules 367 and 368 may be coupled to first and second amplifiers 3691 and 3692, respectively, for amplifying the control signals input to the first and second actuators 311 and 312, respectively.

Thus, the low frequency control signals below 400Hz input by the first actuator 311 and the second actuator 312 are identical, and the high frequency control signals above 400Hz input by the first actuator 311 and the second actuator 312 are approximately identical. In theory, the loudness difference per octave of the sound excited by the first driver 311 and the sound excited by the second driver 312 is less than 3dB.

In consideration of the difference between the first and second vibration parts 3231 and the assembly difference at the installation positions of the first and second actuators 311 and 312, the refrigerator 31 further includes a first delay module 366, and the added low frequency control signal is delayed by the first delay module 366 so that there is a phase difference between the low frequency control signal and the high frequency control signal.

According to the Hasi theory, when the time difference between the sound waves of two same sound sources and the listener is within 5ms-35ms, the listener cannot distinguish the two sound sources, and can only perceive the azimuth of the leading sound, but cannot hear the lagging sound.

Thus, the user can only perceive the azimuth of the high-frequency sound above 400Hz heard earlier, and it is difficult to perceive the azimuth of the low-frequency sound below 400Hz heard later.

At this time, for the high-frequency sound higher than 400Hz, the sound is generated by the vibration of the second casing 323 surface, the user is hard to perceive the direction of the high-frequency sound, for the low-frequency sound lower than 400Hz, the user can only hear the volume superposition of the low-frequency sound lower than 400Hz, that is, the problem of negligence of sound cannot occur, the user cannot perceive the direction of the high-frequency sound, the problem of negligence of sound source cannot occur, and the perception sensitivity of the user to the position of the sound source of the refrigerator 31 is reduced.

In some embodiments, the refrigerator 31 may simultaneously modify the control signals of the second recess 3211 and the first and second actuators 311 and 312.

Fig. 40 is a schematic view of a structure of a refrigerator according to an embodiment of the present disclosure. Fig. 38 is a system architecture diagram of the refrigerator of fig. 40.

In some embodiments, referring to fig. 40 and 38, the refrigerator 31 may further be provided with an exciter capable of emitting bass sound on the basis of fig. 27, and in some embodiments, the first exciter 311 and the second exciter 312 are provided on the switch door; the refrigerator 31 further includes a third exciter 313, where the third exciter 313 is disposed on the storage part and is used to drive the second casing 323 on the storage part to vibrate and sound. That is, in consideration of the small area of the opening and closing door, it is possible to emit low frequency sound through the third exciter 313 and high frequency sound through the first and second exciters 311 and 312 located on the opening and closing door by providing the third exciter 313 at the outer wall surface position of the case 320.

In some embodiments, the third actuator 313 may be one or more. For example, referring to fig. 40, a third actuator 313 may be disposed at the top of the storage part, and a third actuator 313 may be disposed at the side of the storage part.

In some embodiments, the refrigerator 31 further includes a controller; the input end of the third high-pass filter 371 is electrically connected with the controller, and is used for filtering out acoustic wave signals lower than a preset frequency, and the output end of the third high-pass filter 371 is electrically connected with the first exciter 311; the input end of the third low-pass filter 372 is electrically connected with the controller and is used for filtering sound wave signals with frequency higher than a preset frequency; the input end of the fourth high-pass filter 373 is electrically connected with the controller, and is used for filtering out acoustic wave signals lower than a preset frequency, and the output end of the fourth high-pass filter 373 is electrically connected with the second exciter 312; the input end of the fourth low-pass filter 374 is electrically connected with the controller and is used for filtering out sound wave signals with frequencies higher than a preset frequency.

The third high-pass filter 371, the third low-pass filter 372, the fourth high-pass filter 373, and the fourth low-pass filter 374 may be all kinds well known to those skilled in the art, and the embodiments of the present disclosure are not limited.

The preset frequency is a frequency point where the loudness difference of the sounds emitted from the first and second vibration parts 3231 is large, and may be 400Hz, for example. In this way, the third high-pass filter 371 and the fourth high-pass filter 373 may pass high-frequency control signals higher than 400Hz. The third low pass filter 372 and the fourth low pass filter 374 may pass low frequency control signals below 400Hz.

In some embodiments, the refrigerator 31 includes a fourth summing module 375, the output of the third low-pass filter 372 and the output of the fourth low-pass filter 374 are both electrically connected to an input of the fourth summing module 375, and an output of the fourth summing module 375 is electrically connected to the third exciter 313. That is, the fourth summing module 375 mixes the low-frequency control signals of 400Hz or less passing through the third low-pass filter 372 and the fourth low-pass filter 374, and transmits the summed control signals to the third exciter 313 to control the third exciter 313 to emit low-frequency sounds of 400Hz or less.

In some embodiments, the fourth summing module 375 may be implemented as an existing summing method, and processed by an ARM processor or by a digital signal processor (Digital Signal Processing), so that the summation has a low calculation amount and a low hardware requirement on the refrigerator 31.

In some embodiments, the outputs of the third high pass filter 371, the fourth high pass filter 373, and the fourth summing module 375 may be connected to the third amplifier 3761, the fourth amplifier 3762, and the fifth amplifier 3763, respectively, for amplifying the control signals input to the first driver 311, the second driver 312, and the third driver 313, respectively.

In some embodiments, the refrigerator 31 may modify the second recess 3211 while providing the third actuator 313 on the storage part, which is not limited by the embodiments of the present disclosure.

Fig. 41 is a schematic diagram of a refrigerator according to an embodiment of the present disclosure. Fig. 39 is a system architecture diagram of the refrigerator of fig. 41.

In some embodiments, the refrigerator 31 may further be provided with a speaker capable of emitting a low frequency sound on the basis of fig. 27, and in some embodiments, the refrigerator 31 further includes a low frequency speaker 314, the low frequency speaker 314 being for emitting a low frequency sound; the heat preservation 321 is provided with a third concave part for accommodating the woofer 314, and a sound outlet hole is arranged at a position of the second shell 323 corresponding to the third concave part and communicated with the inner side and the outer side of the second shell 323;

The woofer 314 may be a woofer, which is well known to those skilled in the art, and which may emit bass sounds. The insulating layer 321 is provided with a third recess portion for accommodating the woofer 314, and the third recess portion may be disposed at any position of the case 320. Illustratively, the woofer 314 may be disposed at the top or bottom of the cabinet 320.

The second housing 323 is provided with a sound outlet hole so that sound emitted from the woofer 314 can be transmitted to the outside of the refrigerator 31 through the sound outlet hole. The sound outlet holes can be round holes, rectangular holes and the like. The number of the sound outlet holes can be multiple.

In some embodiments, the refrigerator 31 further includes: the second ventilation protection piece is arranged at the sound outlet and used for preventing foreign matters from entering the third concave part.

Wherein, the second ventilation protection piece has better ventilation performance, and does not influence the mutual circulation between the hot air in the third concave part and the cold air outside the refrigerator 31. Meanwhile, the second ventilation protection piece can also prevent external foreign matters, such as water, dust, fuzzes and the like, from entering the third concave part through the sound outlet, namely, the bass loudspeaker 314 can be well protected by arranging the second ventilation protection piece.

In some embodiments, the second breathable protective member comprises a polytetrafluoroethylene layer and a textile layer, wherein the polytetrafluoroethylene layer and the textile layer are mutually attached, the polytetrafluoroethylene layer and the textile layer are better in breathability, and the textile layer can form protection for the polytetrafluoroethylene layer to avoid foreign matter from blocking the polytetrafluoroethylene layer.

In some embodiments, the second air permeable guard is removably attached to the refrigerator 31 for periodic cleaning or replacement of the second air permeable guard.

In some embodiments, the refrigerator 31 further includes a controller; the input end of the fifth high-pass filter 381 is electrically connected to the controller, and is used for filtering out acoustic wave signals lower than a preset frequency, and the output end of the fifth high-pass filter 381 is electrically connected to the first exciter 311; the input end of the fifth low-pass filter 382 is electrically connected with the controller and is used for filtering sound wave signals with frequency higher than a preset frequency; the input end of the sixth high-pass filter 383 is electrically connected with the controller and is used for filtering out sound wave signals lower than a preset frequency, and the output end of the sixth high-pass filter 383 is electrically connected with the second exciter 312; the input end of the sixth low-pass filter 384 is electrically connected to the controller, and is used for filtering out the acoustic wave signals higher than the preset frequency.

The fifth high-pass filter 381, the fifth low-pass filter 382, the sixth high-pass filter 383, and the sixth low-pass filter 384 may be of types well known to those skilled in the art, and the embodiments of the present disclosure are not limited.

The preset frequency is a frequency point where the loudness difference of the sounds emitted from the first and second vibration parts 3231 is large, and may be 400Hz, for example. Thus, the fifth high pass filter 381 and the sixth high pass filter 383 may pass high-frequency control signals higher than 400Hz. The fifth low pass filter 382 and the sixth low pass filter 384 may pass low frequency control signals below 400Hz.

In some embodiments, the output of fifth low pass filter 382 and the output of sixth low pass filter 384 are both electrically connected to the input of fifth summing module 385, and the output of fifth summing module 385 is electrically connected to woofer 314. That is, the fifth low pass filter 382 and the sixth low pass filter 384 pass through the low frequency control signal of less than 400Hz and mix the signals by the fifth summing module 385, and the summed control signal is supplied to the woofer 314 to control the woofer 314 to emit the low frequency sound of less than 400Hz.

In some embodiments, the adding mode of the fifth adding module 385 may be an existing adding mode, and the adding operation is low, and the hardware requirement of the refrigerator 31 is low, and the adding operation is processed by an ARM processor or a digital signal processor (Digital Signal Processing).

In some embodiments, the outputs of fifth high pass filter 381, sixth high pass filter 383, and fifth summing module 385 may be connected to sixth amplifier 3861, seventh amplifier 3862, and eighth amplifier 3863, respectively, for amplifying control signals input to first exciter 311, second exciter 312, and woofer 314, respectively.

In some embodiments, the refrigerator 31 may modify the second recess 3211 while providing the woofer 314, which embodiments of the present disclosure are not limited.

Fig. 42 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure when the first and second actuators include voice coils. Fig. 43 is a schematic view of the actuator of fig. 42.

In some embodiments, referring to fig. 42 and 43, the first actuator 311 and the second actuator 312 have the same structure and are both electromagnetic actuators. The electromagnetic actuator includes a vibratable voice coil 3121, a spring 3122, a coil, and a magnetic assembly.

The magnetic component comprises a first magnetic conduction piece, a second magnetic conduction piece and a magnet, wherein the first magnetic conduction piece can be T-shaped iron or U-shaped iron, and the second magnetic conduction piece is washer. Taking the U iron as an example, the magnet and the washer are both positioned in a cavity surrounded by the U iron, a magnetic air gap is arranged between the outer wall surfaces of the magnet and the washer and the inner wall surface of the U iron, the voice coil 3121 extends into the magnetic air gap and is surrounded outside the magnet and the washer, and the magnetic component is used for providing a stable magnetic field in the magnetic air gap. A variable control signal may be input into the coil to generate an alternating magnetic field. The coil can reciprocate along the circumferential direction of the coil in the superimposed magnetic field of the alternating magnetic field and the stabilizing magnetic field.

The damper 3122 is enclosed outside the voice coil 3121, and for example, the damper 3122 may be connected to an outer wall surface of the voice coil 3121. The elastic wave 3122 is an elastic member, and can elastically deform along with vibration sound of the voice coil 3121, so as to avoid deflection of the voice coil 3121 during reciprocating movement.

In some embodiments, the refrigerator 31 further includes a heat transfer member 330, the voice coil 3121 is connected to the second housing 323 through the heat transfer member 330, and vibration of the voice coil 3121 can be transferred to the second housing 323 through the heat transfer member 330 to realize vibration sound of the second housing 323.

In some embodiments, the heat transfer element 330 is a heat conducting material, and the heat generated by the voice coil 3121 can be conducted to the second housing 323 through the heat transfer element 330.

The material of the voice coil 3121 may be kraft paper, aromatic polyamide, etc., which are well known to those skilled in the art. In some embodiments, the voice coil 3121 is a thermally conductive material, such as aluminum, with a lower weight and a higher thermal conductivity to increase the amount of heat exchange between the heat transfer element 330 and the voice coil 3121.

Thus, the heat generated by the voice coil 3121 can be effectively transferred to the heat transfer element 330, the heat transfer element 330 is heated to raise the temperature, heat exchange occurs between the heat transfer element 330 and the second housing 323, the heat on the heat transfer element 330 is transferred to the second housing 323, the second housing 323 is in contact with air, and the heat exchange is performed with the air to lower the temperature of the heat transfer element 330, so that the heat of the voice coil 3121 can be continuously transferred to the heat transfer element 330, the heat dissipation effect of the voice coil 3121 is better, the overheating of the voice coil 3121 is avoided, and the vibration amplitude of the voice coil 3121 is reduced.

The heat transfer member 330 may be a metal member such as a bolt or a screw. In some embodiments, the heat transfer member 330 has a viscous heat-conductive adhesive, so that the voice coil 3121 can be fixed on the second housing 323 by coating the heat-conductive adhesive between the voice coil 3121 and the second housing 323, which is easy to assemble and has high fixing stability.

In some embodiments, the heat transfer element 330 may be a silicone heat conductive adhesive, a polyurethane heat conductive electrically conductive adhesive, or the like.

Fig. 44 is a schematic view of the support member of fig. 43. Fig. 45 is a second schematic structural view of the support member in fig. 43. Fig. 46 is a cross-sectional view of the support of fig. 44 and 45.

Referring to fig. 42 to 46, considering that the voice coil 3121 is of a thin-walled cylindrical structure, the end surface area of the voice coil 3121 is small, and in some embodiments, the refrigerator 31 further includes a support 340, the support 340 having: a plug 341, the voice coil 3121 being plugged with the plug 341; the communication portion 342, the communication portion 342 communicates with the plug portion 341, and the communication portion 342 penetrates through a side of the support 340 facing the second housing 323, and the heat transfer member 330 is filled in the plug portion 341 and the communication portion 342.

The supporting member 340 may have a columnar structure or a cylindrical structure as shown in fig. 44 to 46. The socket 341 is provided on one of the end surfaces of the support 340, and the voice coil 3121 and the socket 341 are inserted into each other and fixed by the heat transfer member 330, so that the fixing stability between the voice coil 3121 and the support 340 is high. And the voice coil 3121 is in contact with the heat transfer member 330, heat on the voice coil 3121 can be efficiently transferred to the heat transfer member 330.

The opposite end surface of the support 340 contacts the second housing 323, and the contact area between the support 340 and the second housing 323 is large and the support stability is high with respect to the end surface area of the voice coil 3121.

The support 340 is further provided with a communication portion 342, one end of the communication portion 342 is communicated with the plug portion 341, and the other end of the communication portion 342 penetrates through the end face of the support 340, so that the heat transfer element 330 can flow into the communication portion 342 through the plug portion 341 and bond and fix the support 340 and the second housing 323. At this time, the heat transfer member 330 is fixedly connected to the second housing 323 and the voice coil 3121, respectively, and heat of the voice coil 3121 can be transferred to the second housing 323 through the heat transfer member 330.

In some embodiments, the radial dimension of the end of the communication portion 342 near the second housing 323 is greater than the radial dimension of the end of the plug portion 341 away from the second housing 323.

In order to stably plug the plug 341 into the voice coil 3121, a radial dimension of an end of the plug 341 away from the second housing 323 is equal to a thickness of the voice coil 3121, and a gap between the plug 341 and the voice coil 3121 is used to fill the heat transfer member 330. Of course, the radial dimension of the end of the plug portion 341 near the second housing 323 may be larger than the thickness of the voice coil 3121 to fill a larger amount of the heat transfer member 330.

Thus, referring to fig. 46, the radial dimension of the communication portion 342 in the radial direction of the voice coil 3121 may be fixed. At this time, in order to effectively fix the support 340, the radial dimension of the communication portion 342 in the radial direction of the voice coil 3121 may be greater than the thickness of the voice coil 3121. In this way, the fixing area between the support 340 and the second housing 323 is large.

The radial dimension of the communication portion 342 may be increased stepwise or gradually from the end near the voice coil 3121 to the end far from the voice coil 3121 to increase the coating area of the heat transfer member 330 on the second housing 323, improving the fixing stability of the support member 340.

In some embodiments, when the second housing 323 is made of different materials, the second housing 323 may have different thicknesses. Illustratively, the thickness of the second housing 323 of steel material may be 1mm-2mm, and the thickness of the second housing 323 of glass material may be 2mm-3mm.

Then, when the thickness of the second housing 323 is small, the rigidity of the second housing 323 is small, and the second housing 323 is easily deformed.

Fig. 47 is a schematic view of the first structure of the second housing in fig. 42 with a reinforcing plate. Fig. 49 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of fig. 47. Fig. 48 is a second schematic structural view of the second housing in fig. 42 with a reinforcing plate.

Referring to fig. 47 to 49, in some embodiments, the refrigerator 31 further includes a sound board 350, the sound board 350 is attached to a side of the second housing 323 corresponding to the recess, the voice coil 3121 is fixedly connected to the sound board 350, and the damping of the sound board 350 is greater than the damping of the second housing 323.

The sound emitting plate 350 may be fixedly coupled to the second housing 323 by a fastener such as a bolt. In some embodiments, both sides of the sound board 350 are adhered and fixed to the second housing 323 and the voice coil 3121 through the heat transfer member 330, so that the fixing stability is high, and a large amount of heat exchange exists between the sound board 350 and the second housing 323.

When the thickness of the second housing 323 is small, the damping of the second housing 323 is small and the hardness is large, so that the second housing 323 is liable to generate resonance sound and sharp sound of a high frequency. By providing the sound emitting plate 350 with a large damping, the damping and rigidity of the first and second vibration parts 3231 are improved, so that the frequency range of sound emitted by the second housing 323 can be enlarged, the resonance sound and the high-frequency sharp sound emitted by the second housing 323 are avoided, and the influence of the remarkable peak-valley and distortion of the audio response of the second housing 323 on the hearing is also avoided.

The thickness of sound board 350 may be less than 3mm. Illustratively, the thickness of sound board 350 in embodiments of the present disclosure may be 2mm.

Since the exciter has a magnet, the distance between the exciter and the second housing 323 becomes large after the sounding board 350 is provided. In this way, when the material of the second housing 323 is a magnetic metal such as iron, the magnetic attraction force between the second housing 323 and the actuator can be reduced, and the vibration of the actuator can be prevented from being affected by the magnetic attraction force between the second housing 323 and the actuator.

Considering that the first and second vibration parts 3231 may vibrate with the sound emitting plate 350 while the portion of the second housing 323 connected to the insulation layer 321 is fixed, the sound emitting plate 350 may be disposed at middle positions of the first and second vibration parts 3231, respectively.

In some embodiments, a relief gap is provided between the edge of the sound emitting plate 350 and the edge of the first vibration portion and between the edge of the sound emitting plate 350 and the edge of the second vibration portion 3231, the relief gap being provided along the circumferential direction of the sound emitting plate 350. Illustratively, the width of the relief gap may be 5mm-15mm. For the setting mode that sounding board 350 laminating depressed part internal wall surface, the width in the clearance of dodging is great in this disclosed embodiment, and the part that second casing 323 corresponds with dodging the clearance can constitute the transition region to vibrate along with sounding board 350, avoid because of the too little clearance between sounding board 350's edge and the depressed part edge, when leading to second casing 323 to vibrate, the second casing 323 receives too big shearing force with the corresponding part of depressed part opening and can not obtain enough amplitude and influence the volume.

To achieve heat conduction between the voice coil 3121 and the second housing 323, in some embodiments, the sound emitting plate 350 includes a sound emitting plate body 351 and a heat conducting portion 352 for conducting heat, the voice coil 3121 is connected to the heat conducting portion 352, and the heat transfer member 330 is disposed between the second housing 323 and the heat conducting portion 352 and between the heat conducting portion 352 and the voice coil 3121, respectively.

At this time, the heat conductive part 352 constitutes a part of the sound emitting plate 350 and vibrates with the sound emitting plate 350. After the voice coil 3121 is connected to the sounding board 350 through the heat transfer member 330, heat of the voice coil 3121 may be transferred to the heat conductive part 352 through the heat transfer member 330, and heat of the heat conductive part 352 may be transferred to the second housing 323 through the heat transfer member 330.

The heat conductive portion 352 may be made of silicone heat conductive adhesive, polyurethane heat conductive and electric conductive adhesive, heat conductive silicone grease, etc.

In some embodiments, the sound board 350 is a sandwich board, wherein the sound emitted by the sandwich board has a higher amplitude and a lower frequency than the sound emitted by the steel plate and the glass plate, that is, the sound emitted by the sandwich board has a better sound quality than the sound emitted by the steel plate or the glass plate.

In some embodiments, sound board 350 includes a core 353 and skins (not shown) attached to opposite sides of core 353; the skin is a heat conductive material, and the heat conductive portion 352 is disposed at a position of the core 353 corresponding to the voice coil 3121.

The material and structure of the core 353 are different depending on the type of sandwich panel. By way of example, the sound board 350 may be a honeycomb sandwich panel, such as an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, or the like. In this case, the core 353 has a plate-like structure having a plurality of through holes, and the core 353 may be made of aluminum, aramid, kraft paper, or the like. Referring to fig. 46, the heat conductive portion 352 may be filled at a position of the through hole opposite to the voice coil 3121.

The sound board 350 may also be a foam sandwich panel, such as a polyvinyl chloride (Polyvinyl chloride, PVC) foam sandwich panel, a Polymethacrylimide (PMI) foam sandwich panel, or the like. The foam sandwich panel is formed by a foaming process. At this time, the core material 353 has a receiving groove for receiving the heat conductive portion 352, and the heat conductive portion 352 is disposed in the receiving groove. Wherein, when the foam sandwich panel is formed, the heat conduction portion 352 can be arranged between the first skin and the second skin, and when the core material 353 is formed by foaming, the heat conduction portion 352 can be filled between the first skin and the second skin and is enclosed outside the heat conduction portion 353. Of course, after the core 353 is molded, the foam sandwich panel may be perforated to form a storage groove, and in this case, the storage groove may be filled with the heat conductive portion 352.

In order to improve the heat conduction efficiency between the voice coil 3121 and the heat conduction portion 352 and between the heat conduction portion 352 and the second housing 323, the skins on both sides of the core 353 are made of a heat conduction material, such as carbon fiber, aluminum foil, or the like.

In this way, the heat of the voice coil 3121 can be transferred to the skin through the heat transfer member 330, the heat of the skin is transferred to the heat conductive part 352, and then the heat of the heat conductive part 352 can be transferred to the skin of the other side, which can be transferred to the second housing 323 through the heat transfer member 330 for heat dissipation.

To achieve heat conduction between the voice coil 3121 and the second housing 323, referring to fig. 48, in some embodiments, the sound board 350 includes a avoiding portion, where the avoiding portion is connected to two sides of the sound board 350, and the voice coil 3121 may pass through the avoiding portion and be fixedly connected to the second housing 323. At this time, the voice coil 3121 is directly connected to the second housing 323 through the heat transfer member 330, and the transfer path is small and the heat transfer efficiency is high.

A second aspect of the disclosed embodiments provides a sound emitting device including a plurality of sound emitting members, the sound waves emitted by the plurality of sound emitting members each having a loudness difference at each octave of less than 3dB. Therefore, the user perceives sensitivity of the sound source of the sound generating device to meet, and the problems of large sound negligence and remote negligence of the sound source position are avoided.

The sound producing member may be an exciter or a speaker, etc.

In some embodiments, depending on the type of sound emitting device, it may control the sound waves of the sound emitting device in different ways. By way of example, the size of the recess in which the exciter is housed, the control signal control method of the exciter, the setting of the woofer 314, etc. may be improved.

In some embodiments, the sound generating device is any one of a television, a mobile phone, an earphone and a sound box, that is, through the above manner, different sound generating devices provided with a plurality of sound generating pieces can be adjusted, so that the sensitivity of a user to the sound source perception of the sound generating device is reduced, and the user experience is optimized.

When the sound emitting device is a television handset, an earphone or a sound box, the sound emitting element can be an exciter, and the sensitivity of a user to a sound source of the television is reduced by improving a control signal control method (shown in fig. 37) of the exciter.

Of course, the embodiments of the present disclosure are not limited by the improvement of the control signal control method of the exciter and the simultaneous setting of the woofer 314 or setting of the woofer-able exciter.

In some embodiments, the refrigerator provided by the embodiments of the present disclosure is provided with an exciter, and a voice coil in the exciter is connected with a protection shell through a heat transfer element easy to conduct heat, so as to push the protection shell to vibrate and sound, and compared with a loudspeaker to sound, the sound pressure level of sound emitted by the protection shell is better. Meanwhile, the integrity of the protective shell is good, the exciter can be effectively protected, heat generated by vibration of the voice coil can be timely transferred to the protective shell through the heat transfer element, and the protective shell and air can be subjected to heat exchange and cooling, so that the heat of the voice coil can be continuously conducted to the protective shell, and the heat dissipation and cooling of the voice coil are realized.

In some embodiments, the housing may be a box, the first housing may be a liner, the second housing may be a protective shell, the insulating layer may be a heat insulating member, and the accommodating portion may be a recess. The following specifically describes the heat dissipation and cooling of the voice coil in the actuator:

fig. 50 is a schematic structural view of a refrigerator according to an embodiment of the present disclosure. FIG. 51 is a schematic view of the actuator of FIG. 50 coupled to a protective housing. Fig. 52 is a schematic view of the actuator of fig. 51.

Referring to fig. 50 to 52, a refrigerator according to an embodiment of the present disclosure includes a case 410, the case 410 including an inner container 411, a protective case 412, and a heat insulating member 413, the heat insulating member 413 being disposed between the inner container 411 and the protective case 412, the heat insulating member 413 being provided with a recess 4131, an opening of the recess 4131 being closed by the protective case 412; a heat transfer member 420, the heat transfer member 420 being connected to the shield shell 412; and an exciter 430, wherein the exciter 430 comprises a voice coil 431 capable of vibrating, the voice coil 431 is connected with the heat transfer element 420 to transfer the vibration of the voice coil 431 to the protecting shell 412 and drive the protecting shell 412 to vibrate and sound, and the heat generated by the voice coil 431 can be transferred to the protecting shell 412 through the heat transfer element 420.

To increase the heat exchange between the protective shell 412 and the air, in some embodiments, the protective shell 412 is a heat-conductive material, such as a metal piece of steel, which has better heat conductivity, is easy to exchange heat with the air, and has higher strength and higher protection performance.

In some embodiments, when the number of the actuators 430 is plural, the actuators 430 may be provided at the refrigerator body and the switch door at the same time. Illustratively, an actuator 430 is provided for each switch door, and an actuator 430 is also provided for the refrigerator body. The embodiment of the present disclosure is described taking an example in which the actuator 430 is provided on the opening and closing door.

In some embodiments, the heat insulator 413 is provided with a recess 4131, and the actuator 430 is disposed in the recess 4131, with the opening of the recess 4131 facing one side of the shield shell 412. Thus, the shield 412 is fixedly connected to the heat insulator 413, and the exciter 430 is connected to a portion of the shield 412 corresponding to the recess 4131 to vibrate and sound the portion of the shield 412.

Thus, embodiments of the present disclosure do not compromise the integrity of the shield 412, the exciter 430 is not exposed to air, and the shield 412 has better shielding properties. Meanwhile, the sound emitted by the surface vibration of the embodiment of the disclosure has larger sound pressure level and flatter frequency response compared with the sound emitted by the loudspeaker in the related art, and the tone quality is better.

In some embodiments, the depth of the recess 4131 is less than the thickness of the insulation 413. Thus, the heat insulation member 413 with a preset thickness is still arranged between the bottom wall surface of the recess 4131 and the inner container 411, so that the cool air in the refrigerator is prevented from being dissipated through the recess 4131, and the heat insulation performance of the heat insulation member 413 is good.

In some embodiments, the exciter 430 includes a voice coil 431, a sprung wave 432, a coil, and a magnetic assembly. The magnetic component comprises a first magnetic conduction piece, a second magnetic conduction piece and a magnet, wherein the first magnetic conduction piece can be T-shaped iron or U-shaped iron, and the second magnetic conduction piece is washer. Taking U iron as an example, the magnet and the washer are both positioned in a cavity surrounded by the U iron, a magnetic air gap is arranged between the outer wall surfaces of the magnet and the washer and the inner wall surface of the U iron, the voice coil 431 extends into the magnetic air gap and is surrounded outside the magnet and the washer, and the magnetic assembly is used for providing a stable magnetic field in the magnetic air gap. A variable control signal may be input into the coil to generate an alternating magnetic field. The coil can reciprocate along the circumferential direction of the coil in the superimposed magnetic field of the alternating magnetic field and the stabilizing magnetic field.

The elastic wave 432 is enclosed outside the voice coil 431, for example, the elastic wave 432 may be connected to an outer wall surface of the voice coil 431. The elastic wave 432 is an elastic member and can elastically deform along with the vibration of the voice coil 431 to avoid deflection of the voice coil 431 during reciprocating movement.

In some embodiments, the voice coil 431 is fixedly connected to the shield 412 by a heat transfer member 420, and the heat transfer member 420 is a heat conductive material.

The material of the voice coil 431 may be kraft paper, aromatic polyamide, etc. known to those skilled in the art. In some embodiments, the voice coil 431 is a heat conductive material, such as aluminum, with a smaller weight and a higher heat conductivity to increase the amount of heat exchange between the heat transfer member 420 and the voice coil 431.

Thus, the heat generated by the voice coil 431 can be effectively transferred to the heat transfer element 420, the heat transfer element 420 is heated to raise the temperature, heat exchange occurs between the heat transfer element 420 and the protective shell 412, the heat on the heat transfer element 420 is transferred to the protective shell 412, the protective shell 412 is in contact with air, and the heat exchange is carried out with the air to lower the temperature of the heat transfer element 420, so that the heat of the voice coil 431 can be continuously transferred to the heat transfer element 420, and the heat dissipation effect of the voice coil 431 is good.

The heat transfer member 420 may be a metal member such as a bolt or a screw. In some embodiments, the heat transfer member 420 has a viscous heat-conducting glue, so that the voice coil 431 can be fixed on the protecting shell 412 by coating the heat-conducting glue between the voice coil 431 and the protecting shell 412, which is easy to assemble and has high fixing stability.

The heat transfer member 420 may be a silicone heat conductive adhesive, a polyurethane heat conductive adhesive, or the like.

Fig. 53 is a schematic view of the support member in fig. 52. Fig. 54 is a second schematic structural view of the support member in fig. 52. Fig. 55 is a cross-sectional view of the support of fig. 53 and 54.

Referring to fig. 53 to 55, considering that the voice coil 431 has a thin-walled cylindrical structure, the end surface area of the voice coil 431 is smaller, and in some embodiments, the refrigerator further includes a support member 440, the support member 440 has a plugging portion 441, and the voice coil 431 is plugged into the plugging portion 441; the communication portion 442, the communication portion 442 is communicated with the plug portion 441, and the communication portion 442 penetrates through one side of the support member 440 facing the protective shell 412, and the heat transfer member 420 is filled in the plug portion 441 and the communication portion 442. The supporting member 440 corresponds to the supporting member 440 of fig. 44, and is not described herein.

The supporting member 440 may have a columnar structure or a cylindrical structure as shown in fig. 4 to 6. The insertion portion 441 is disposed on one of the end surfaces of the support member 440, and the voice coil 431 and the insertion portion 441 are inserted into each other and fixed by the heat transfer member 420, so that the fixing stability between the voice coil 431 and the support member 440 is high. And the voice coil 431 is in contact with the heat transfer member 420, heat on the voice coil 431 can be effectively transferred to the heat transfer member 420.

The opposite end surface of the support member 440 contacts the shield case 412, and the contact area between the support member 440 and the shield case 412 is large and the support stability is high with respect to the end surface area of the voice coil 431.

The support member 440 is further provided with a communication portion 442, one end of the communication portion 442 is communicated with the insertion portion 441, and the other end of the communication portion 442 penetrates through the end face of the support member 440, so that the heat transfer member 420 can flow into the communication portion 442 via the insertion portion 441, and the support member 440 and the protective shell 412 are adhered and fixed. At this time, the heat transfer member 420 is fixedly connected to the shield case 412 and the voice coil 431, respectively, and the heat of the voice coil 431 can be transferred to the shield case 412 through the heat transfer member 420.

In some embodiments, referring to fig. 6, the radial dimension of the end of the communication portion 442 near the protecting shell 412 is larger than the radial dimension of the end of the inserting portion 441 far from the protecting shell 412.

In order to make the plug portion 441 stably plug with the voice coil 431, a radial dimension of an end of the plug portion 441 away from the protection case 412 is equal to a thickness of the voice coil 431, and a gap between the plug portion 441 and the voice coil 431 is used for filling the heat transfer member 420. Of course, the radial dimension of the end of the insertion portion 441 near the shield case 412 may be larger than the thickness of the voice coil 431 to fill a larger amount of the heat transfer member 420.

Thus, referring to fig. 6, the radial dimension of the communication portion 442 in the radial direction of the voice coil 431 may be fixed. At this time, in order to effectively fix the support 440, the radial dimension of the communication portion 442 in the radial direction of the voice coil 431 may be greater than the thickness of the voice coil 431. In this way, the fixing area between the supporter 440 and the shield case 412 is large.

The radial dimension of the communication portion 442 may be increased stepwise or gradually from the end near the voice coil 431 to the end far from the voice coil 431 to increase the coating area of the heat transfer member 420 on the shield case 412, thereby improving the fixing stability of the support member 440.

In some embodiments, when the protective housing 412 is made of different materials, the protective housing 412 may have different thicknesses. Illustratively, the thickness of the steel shield 412 may be 1mm-2mm and the thickness of the glass shield 412 may be 2mm-3mm.

Then, when the thickness of the shield shell 412 is small, the rigidity of the shield shell 412 is small, and the shield shell 412 is easily deformed. FIG. 56 is a schematic view showing a structure of the protective housing of FIG. 50 with a reinforcing plate. Fig. 58 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of fig. 56. FIG. 57 is a second schematic view of the structure of the protective housing of FIG. 50 with a reinforcing plate. Referring to fig. 56 to 58, in some embodiments, the refrigerator further includes a sound board 450, the sound board 450 is attached to a side of the protection shell 412 corresponding to the recess 4131, the exciter 430 is fixedly connected to the sound board 450, and the damping of the sound board 450 is greater than that of the protection shell 412.

The sound board 450 may be fixedly coupled to the shield 412 by fasteners such as bolts. In some embodiments, both sides of the sound board 450 are adhered and fixed to the protecting shell 412 and the voice coil 431 through the heat transfer member 420, so that the fixing stability is high, and a large heat exchange amount exists between the sound board 450 and the protecting shell 412.

When the thickness of the shield shell 412 is small, the damping of the shield shell 412 is small and the hardness is large, so that the shield shell 412 is liable to generate resonance sound and sharp sound of high frequency. By arranging the sound-producing plate 450 with larger damping, the damping and rigidity of the part of the protecting shell 412 corresponding to the concave part 4131 are improved, the frequency range of sound produced by the protecting shell 412 can be enlarged, the co-ringing sound and high-frequency sharp sound produced by the protecting shell 412 are avoided, and the influence on the hearing caused by obvious peak-valley and distortion of the audio response of the protecting shell 412 is also avoided.

The thickness of the sound board 450 may be less than 3mm. Illustratively, the thickness of the sound board 450 in embodiments of the present disclosure may be 2mm.

Since the exciter 430 has a magnet, the distance between the exciter 430 and the shield case 412 becomes large after the sound plate 450 is provided. Thus, when the material of the shield shell 412 is a magnetic metal such as iron, the magnetic attraction between the shield shell 412 and the actuator 430 can be reduced, and the vibration of the actuator 430 due to the magnetic attraction between the shield shell 412 and the actuator 430 can be avoided.

Considering that the portion of the shield case 412 corresponding to the recess 4131 may vibrate with the sound emitting plate 450 while the portion of the shield case 412 connected to the heat insulator 413 is fixed, the sound emitting plate 450 may be disposed at a central position of the opening of the recess 4131.

In some embodiments, a relief gap is provided between the edge of the sound board 450 and the edge of the opening of the recess 4131, the relief gap being disposed along the circumference of the sound board 450. Illustratively, the width of the relief gap may be 5mm-15mm. For the setting mode that soundboard 450 laminating depressed part 4131 inner wall surface, the width of dodging the clearance is great in this disclosed embodiment, and the part that shield shell 412 and dodging the clearance corresponding can constitute the transition region to vibrate along with soundboard 450, avoid because of the clearance between the edge of soundboard 450 and the depressed part 4131 opening is too little, when leading to shield shell 412 vibration, the part that shield shell 412 and depressed part 4131 opening received too big shearing force can not obtain enough amplitude and influence the volume.

To achieve heat conduction between the voice coil 431 and the shield case 412, in some embodiments, the sound emitting plate 450 includes a sound emitting plate body 451 and a heat conducting portion 452 for conducting heat, the voice coil 431 is connected to the heat conducting portion 452, and the heat transfer member 420 is disposed between the shield case 412 and the heat conducting portion 452 and between the heat conducting portion 452 and the voice coil 431, respectively.

At this time, the heat conductive part 452 constitutes a part of the sound emitting plate 450 and vibrates with the sound emitting plate 450. After the voice coil 431 is connected to the sound board 450 through the heat transfer member 420, heat of the voice coil 431 can be transferred to the heat conducting portion 452 through the heat transfer member 420, and heat of the heat conducting portion 452 is transferred to the protective housing 412 through the heat transfer member 420.

The heat conducting part 452 may be made of organosilicon heat conducting glue, polyurethane heat conducting and electric conducting glue, heat conducting silicone grease, etc.

In some embodiments, the sound board 450 is a sandwich board. The sound emitted by the sandwich board has higher amplitude and lower frequency compared with the sound emitted by the steel plate and the glass plate, that is to say, the sound emitted by the sandwich board has better tone quality compared with the sound emitted by the steel plate or the glass plate.

The sound board 450 comprises a core 453 and skins, wherein the skins are attached to two opposite sides of the core 453; the skin is a heat conductive material, and the heat conductive portion 452 is disposed at a position of the core 453 corresponding to the voice coil 431.

The material and structure of the core 453 are different depending on the type of sandwich panel. Illustratively, the sound board 450 may be a honeycomb sandwich panel, such as an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, or the like. In this case, the core 453 has a plate-like structure having a plurality of through holes, and the core 453 may be made of aluminum, aramid, kraft paper, or the like. Referring to fig. 58, the heat conducting portion 452 may be filled at a position of the through hole opposite to the voice coil 431.

The sound board 450 may also be a foam sandwich panel, such as a polyvinyl chloride (Polyvinyl chloride, PVC) foam sandwich panel, a Polymethacrylimide (PMI) foam sandwich panel, or the like. The foam sandwich panel is formed by a foaming process. At this time, the core 453 has a receiving groove for receiving the heat conductive portion 452, and the heat conductive portion 452 is disposed in the receiving groove. Wherein, when the foam sandwich board is formed, the heat conducting part 452 may be disposed between the first skin and the second skin, and when the core 453 is formed by foaming, the core 453 may be filled between the first skin and the second skin and enclosed outside the heat conducting part 452. Of course, after the core 453 is molded, the foam sandwich plate may be perforated to form a storage groove, and at this time, the storage groove may be filled with the heat conductive portion 452.

In order to improve the heat conduction efficiency between the voice coil 431 and the heat conduction portion 452 and between the heat conduction portion 452 and the protection case 412, the skins on both sides of the core 453 are made of heat conduction materials, such as carbon fiber, aluminum foil, and the like.

Thus, the heat of the voice coil 431 can be transferred to the skin through the heat transfer member 420, the heat of the skin is transferred to the heat conducting portion 452, and then the heat of the heat conducting portion 452 can be transferred to the skin on the other side, and the side skin can be transferred to the shield case 412 through the heat transfer member 420 for heat dissipation.

To achieve heat conduction between the voice coil 431 and the protection shell 412, referring to fig. 57, in some embodiments, the sound board 450 may further include an avoidance portion, where the avoidance portion is connected to two sides of the sound board 450, and the voice coil 431 may pass through the avoidance portion and be fixedly connected to the protection shell 412. At this time, the voice coil 431 is directly connected to the shield case 412 through the heat transfer member 420, and the transfer path is small and the heat transfer efficiency is high.

It can be appreciated that the recess 4131 is in a closed state, on one hand, heat generated when the actuator 430 vibrates can only be dissipated through the protecting shell 412, and on the other hand, gas in the closed space can form an obstruction to the vibration of the protecting shell 412, that is, gas resistance in the closed space can be received when the protecting shell 412 vibrates, so that the vibration amplitude of the protecting shell 412 is reduced.

Fig. 59 is a schematic view of a structure of the refrigerator of fig. 1 in which a heat dissipation path is provided. Fig. 60 is a second schematic structural view of the refrigerator of fig. 50 with a heat dissipation channel.

Referring to fig. 59 to 60, in some embodiments, at least one heat dissipation channel 4132 is disposed in the heat insulating member 413, one end of the heat dissipation channel 4132 is communicated with the inner wall surface of the recess 4131, and the other end of the heat dissipation channel 4132 is communicated with the top wall surface or the bottom wall surface of the heat insulating member 413; the shield shell 412 has a heat dissipation hole disposed opposite to the heat dissipation channel 4132.

One end of the heat dissipation channel 4132 communicates with the recess 4131, and the other end penetrates the outer wall surface of the heat insulator 413. Meanwhile, the protecting shell 412 is provided with a heat dissipation hole, and the heat dissipation hole is opposite to the heat dissipation channel 4132, so that the recess 4131 is communicated with the outside air through the heat dissipation channel 4132, a part of the heat generated by the coil is conducted to the protecting shell 412 through the voice coil 431, and the other part of the heat is conducted to the outside air through the heat dissipation channel 4132, and the heat dissipation effect of the exciter 430 is high.

Meanwhile, in the vibration process of the protecting shell 412, the air in the concave portion 4131 can circulate with the external air through the heat dissipation channel 4132, the air resistance of the protecting shell 412 is small, the vibration amplitude of the protecting shell 412 is large, and the sound emitted by the refrigerator has a large sound pressure level.

In some embodiments, the number of the heat dissipation channels 4132 may be plural, so that the communication area between the recess 4131 and the outside air is larger, which is conducive to dissipating more heat through the heat dissipation channels 4132, and the heat dissipation effect is better.

The heat dissipation holes may be provided at any position of the shield case 412, for example, the heat dissipation holes are provided on the front sidewall of the refrigerator. In some embodiments, the heat dissipation holes may be disposed on the top wall or the bottom wall of the protective housing 412, that is, the heat dissipation holes may be hidden at the bottom or the top of the refrigerator, so that the user is difficult to see the heat dissipation holes from the appearance perspective during the use of the refrigerator, and the appearance of the refrigerator is complete.

And when the heat dissipation holes are provided at the top or bottom of the refrigerator, the heat dissipation channels 4132 may extend in a vertical direction or in an inclined direction to achieve convection of hot air in the recess 4131 with cold air outside the refrigerator by using a chimney effect, thereby improving a heat dissipation rate of the exciter 430.

It will be appreciated that when the recess 4131 is in communication with the outside air through the heat dissipation channel 4132, the actuator 430 is exposed to the air through the heat dissipation channel 4132, and in some embodiments, the refrigerator is further provided with an air-permeable guard for preventing foreign objects from entering the heat dissipation channel 4132.

Wherein, the ventilation performance of the ventilation protection member is better, and the ventilation protection member does not influence the mutual circulation between the hot air in the concave portion 4131 and the cold air outside the refrigerator. Meanwhile, the ventilation protection member can prevent external foreign matters such as water, dust, filth and the like from entering the concave portion 4131 through the heat dissipation channel 4132, namely, the ventilation protection member can form better protection for the exciter 430.

In some embodiments, the breathable protective member comprises a polytetrafluoroethylene layer and a textile layer, wherein the polytetrafluoroethylene layer and the textile layer are mutually attached, the polytetrafluoroethylene layer and the textile layer are good in breathability, and the textile layer can form protection for the polytetrafluoroethylene layer to avoid foreign matters from blocking the polytetrafluoroethylene layer.

In some embodiments, the air permeable guard is removably attached to the refrigerator for periodic cleaning or replacement of the air permeable guard.

Finally, it should be noted that: the above examples are intended only to illustrate embodiments of the present disclosure; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: it may still be possible to modify the foregoing embodiments or replace some or all of the technical features thereof; without departing from the spirit of the corresponding embodiments from the scope of the claims appended hereto.

Claims

A refrigerator, comprising:

an actuator assembly including at least one actuator;

the shell is internally provided with a storage area;

the shell comprises a heat preservation layer, a first shell and a second shell, and the first shell and the second shell are respectively attached to the inner side and the outer side of the heat preservation layer;

The heat preservation layer is internally provided with a containing part, the second shell covers the opening of the containing part, the exciter is arranged in the containing part and connected with the second shell and used for driving the second shell to vibrate and generate sound waves.
The refrigerator of claim 1, wherein the inner wall surface of the receiving part is provided with a concave-convex structure for reflecting the sound wave propagated to the inside thereof a plurality of times.
The refrigerator of claim 2, wherein the concave-convex structure comprises a plurality of convex portions, and a plurality of the convex portions are arranged at intervals and protrude from an inner wall surface of the receiving portion.
The refrigerator of claim 1, wherein the receiving part comprises a plurality of cavities, the cavities are communicated with each other, and the volumes of the cavities are different.
The refrigerator of any one of claims 1 to 4, a center of the actuator and a center of the receiving portion are spaced apart in a direction parallel to the second housing.
The refrigerator of any one of claims 1 to 4, wherein a reinforcing plate is provided on a portion of the second housing corresponding to the receiving portion, the actuator is connected to the reinforcing plate, and a damping of the reinforcing plate is greater than a damping of the second housing.
The refrigerator of claim 6, wherein an escape gap is provided between an edge of the reinforcing plate and an edge of the receiving portion opening, the escape gap being provided along a circumferential direction of the reinforcing plate.
The refrigerator according to any one of claims 1 to 4, wherein a bottom wall surface of the accommodating portion is a plane; or, the bottom wall surface of the accommodating part is matched with the shape of the exciter.
The refrigerator of any one of claims 1-4, the housing comprising a body, the storage area disposed on the body, and a switch door for closing the storage area;

the accommodating part is arranged on the body and/or the switch door.
The refrigerator of any one of claims 1-4, wherein the actuator is any one of an electromagnetic actuator, a magnetostrictive actuator, and a piezoelectric actuator.
The refrigerator of claim 1, the housing being a case for storing items;

the inner cavity of the accommodating part is provided with a protection cavity, the second shell covers the opening of the protection cavity, the exciter is positioned in the protection cavity, and the exciter is connected with the second shell and is used for driving the second shell to vibrate and generate sound waves.
The refrigerator of claim 11, further comprising:

the first shell and the third shell are respectively attached to the inner side and the outer side of the heat preservation layer;

and one end of the elastic piece is connected with the third shell, the other end of the elastic piece is connected with the second shell, and when the third shell vibrates, the elastic piece can elastically deform along the vibration direction of the third shell.
The refrigerator of claim 12, wherein the protection cavity is provided in the elastic member, the protection cavity penetrates through both ends of the elastic member in a vibration direction of the second housing, the second housing and the third housing cover ports of both ends of the elastic member, respectively, and the actuator is located in the protection cavity.
The refrigerator of claim 13, wherein the elastic member is bent in a vibration direction of the second housing.
The refrigerator of claim 13, wherein the elastic member has an adhesive surface on a surface thereof, and the second and third housings are respectively adhered and fixed to the elastic member.
The refrigerator of claim 13, wherein the elastic member is a ventilation member.
The refrigerator of any one of claims 11-16, the second housing comprising a second housing body and a damping layer, the second housing body and the damping layer conforming to one another, the damping layer having a damping greater than a damping of the second housing body.
The refrigerator of claim 17, wherein a foaming chamber is provided in the second housing body, and the damping layer is filled in the foaming chamber.
The refrigerator of claim 18, the second housing having a resonant position that resonates with the actuator when the actuator vibrates the second housing;

the refrigerator further comprises a reinforcing piece, wherein the reinforcing piece is arranged at the resonance position of the second shell and fixedly connected with the second shell.
The refrigerator according to any one of claim 13-16,

the second shell forms the outer wall surface of the box body;

or, a concave part is arranged on the outer wall surface of the box body, the elastic piece and the exciter are positioned in the concave part, an assembly gap is formed between the side wall surface of the second shell and the inner wall surface of the concave part, and the second shell and the outer wall surface of the box body are in smooth transition; the elastic piece is connected with the side wall surface or the bottom wall surface of the concave part.
The refrigerator of claim 1, further comprising:

the shell is a box body;

the actuator assembly includes a first actuator and a second actuator;

the accommodating part comprises a first concave part and a second concave part, the first concave part and the second concave part are arranged at intervals, the first exciter is positioned in the first concave part, and the second exciter is positioned in the second concave part; the second shell covers the opening of the first concave part and the opening of the second concave part respectively, a part of the second shell corresponding to the first concave part forms a first vibration part, and a part of the second shell corresponding to the second concave part forms a second vibration part;

the first exciter is connected with the first vibration part and is used for driving the first vibration part to vibrate and sound, and the second exciter is connected with the second vibration part and is used for driving the second vibration part to vibrate and sound; and the loudness difference of the sound wave emitted by the first vibration part and the sound wave emitted by the second vibration part at each octave is smaller than 3dB.
The refrigerator of claim 21, comprising a bracket and a control board, both of which are located in the first recess, the bracket being fixed to the first vibration part, the control board being fixed to the bracket, the first and second exciters being electrically connected to the control board, respectively;

The second vibration portion has an area smaller than that of the first vibration portion.
The refrigerator of claim 22, wherein an area of the second vibration part is 0.7-0.85 times an area of the first vibration part.
The refrigerator of claim 22, wherein the second recess is the same recess depth at different locations.
The refrigerator of claim 22, the second recess having a first recess depth at a location corresponding to the second actuator, the second recess having a second recess depth at other locations, the first recess depth being greater than the second recess depth.
The refrigerator of claim 22, wherein the second exciter is spaced apart from a center of the second recess in a direction parallel to the second housing.
The refrigerator of claims 1-26, further comprising:

the shell is a box body, the heat preservation layer is a heat insulation piece, the first shell is an inner container, and the second shell is a protective shell;

the accommodating part is a concave part;

a heat transfer element connected to the protective housing;

the exciter comprises a vibratable voice coil which is connected with the heat transfer element to transfer the vibration of the voice coil to the protecting shell and drive the protecting shell to vibrate and sound, and

The heat generated by the voice coil can be conducted to the protective housing through the heat transfer member.
The refrigerator of claim 27 wherein the voice coil is a thermally conductive piece of material.
The refrigerator of claim 27 or 28, wherein the heat transfer member is a heat conductive adhesive having viscosity.
The refrigerator of claim 29, further comprising a support having:

the voice coil is inserted into the insertion part;

the communication part is communicated with the plug-in connection part, the communication part penetrates through one side, facing the protective shell, of the supporting piece, and the heat transfer piece is filled in the plug-in connection part and the communication part.
The refrigerator of claim 30, wherein a radial dimension of the communication portion near an end of the protective case is greater than a radial dimension of the insertion portion far from the end of the protective case.
The refrigerator of claim 27 or 28, further comprising a sound board attached to a side of the protective case corresponding to the recess, the exciter being fixedly connected to the sound board, and a damping of the sound board being greater than a damping of the protective case.
The refrigerator of claim 32, wherein the sound board comprises a sound board body and a heat conducting part for conducting heat, the voice coil is connected to the heat conducting part, and the heat conducting elements are respectively arranged between the protective case and the heat conducting part and between the heat conducting part and the voice coil.
The refrigerator of claim 33, the sound board being a sandwich panel, the sound board comprising a core material and skins, the skins being affixed to opposite sides of the core material;

the skin is made of a heat conducting material, and the heat conducting part is arranged at the position of the core material corresponding to the voice coil.
The refrigerator of claim 32, wherein the sound board comprises an avoidance portion, the avoidance portion is communicated with two sides of the sound board, and the voice coil can pass through the avoidance portion and is fixedly connected with the protective shell.
The refrigerator of claim 27 or 28, wherein the heat insulating member is provided therein with at least one heat dissipation channel, one end of the heat dissipation channel is communicated with the inner wall surface of the recess portion, and the other end of the heat dissipation channel is communicated with the top wall surface or the bottom wall surface of the heat insulating member; the protective shell is provided with a heat dissipation hole, and the heat dissipation hole is opposite to the heat dissipation channel;

the refrigerator is also provided with a ventilation protection piece, and the ventilation protection piece is used for preventing foreign matters from entering the heat dissipation channel.