CN118066769A

CN118066769A - Refrigerator with a refrigerator body

Info

Publication number: CN118066769A
Application number: CN202410259625.3A
Authority: CN
Inventors: 王海盈
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2024-05-24
Also published as: CN118111169A; CN118066768A; CN115474134A

Abstract

The invention provides a refrigerator, which comprises an exciter assembly, a first driving device and a second driving device, wherein the exciter assembly comprises a first exciter and a second exciter; the box body comprises a heat preservation layer, a first shell and a second shell, wherein a first concave part and a second concave part are arranged on the heat preservation layer at intervals, the first exciter is positioned in the first concave part, and the second exciter is positioned in the second concave part; the part of the second shell corresponding to the first concave part forms a first vibration part, and the 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 the second exciter is connected with the second vibration part; 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 provided by the invention can reduce the perception sensitivity of a user to a sound source.

Description

Refrigerator with a refrigerator body

The application is a divisional application, the application number of the original application is 202110656587.1, the original application date is 2021, 6 and 11 days, the application and the creation name of the original application are refrigerator and sounding equipment, and the whole content of the original application is incorporated by reference.

Technical Field

The invention 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. In order to realize sound production of the refrigerator, the refrigerator is further provided with an exciter, and a concave part for accommodating the exciter is arranged in the heat preservation layer so as to drive the second shell to vibrate and produce sound through the exciter. Meanwhile, the second shell is complete, and the deposition of dust, water and other foreign matters on the exciter is avoided.

In order to improve the hearing experience of the user, the refrigerator can be provided with a plurality of exciters which are distributed on the refrigerator at intervals. However, the user is more sensitive to the perception of the sound image of the sound emitted by the plurality of exciters, resulting in the user perceiving that the sound source is biased to one of the exciters, for example, when the user is located at a different location of the refrigerator, the user perceives that the sound source of the sound is located at a different location of the user.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a refrigerator capable of reducing a user's perceived sensitivity to a sound source.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

A first aspect of an embodiment of the present invention provides a refrigerator including 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.

Wherein, through setting up the heat preservation, can make the refrigerator have better heat preservation effect, the second casing can form better protective effect to the refrigerator.

In some embodiments, the heat-insulating 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, the part of the second shell corresponding to the first concave part forms a first vibration part, and the 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. The first exciter and the second exciter drive the second shell to vibrate and sound, namely, the refrigerator is vibrated and sound through the surface, the integrity of the second shell is not damaged, the sealing performance of the refrigerator is good, and on the other hand, the user is insensitive to the sound source perception of the vibration and sound, and even if the user is located at different positions of the refrigerator, the user cannot perceive the change of the position of the sound source, so that the use experience of the user is optimized. And the refrigerator drives the second shell to vibrate and sound through a plurality of exciters, and the sound pressure level of sound emitted by the refrigerator is higher.

In some embodiments, the sound waves emitted by the first vibration portion and the sound waves emitted by the second vibration portion each have a loudness difference at each octave of less than 3dB.

Therefore, the sound frequency response curve emitted by the first exciter and the sound frequency response curve emitted by the second exciter are approximately in a superposition state, the user cannot perceive the loudness difference between the sound waves emitted by the first exciter and the sound waves emitted by the second exciter, the phenomenon that the user perceives the sound source to deviate to one of the exciters is avoided, and the sensitivity of the user to the sound source is reduced.

In some embodiments, the refrigerator includes 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 control panel, the display screen and other components can be arranged in any one of the first concave part and the second concave part in a concentrated way, so that the assembly is convenient.

In some embodiments, the first recess has a first projected area on the second housing, i.e., an area of the first vibration portion, and the second recess has a second projected area on the second housing, i.e., an area of the second vibration portion, which is smaller than the first projected area, i.e., an area of the second vibration portion is smaller than an area of the first vibration portion. Because the first vibration portion is affected by the bracket, the vibration amplitude of the first vibration portion can be reduced, and therefore, the first vibration portion and the second vibration portion can push approximately the same air amount by reducing the size of the second concave portion, so that bass difference caused by the first vibration portion and the second vibration portion is avoided, and a user perceives the sound source position of the refrigerator.

In some embodiments, the area of the second vibratory portion is 0.7-0.85 times the area of the first vibratory portion.

In some embodiments, the recess depth is the same at different locations of the second recess, and the second recess is easy to mold.

In some embodiments, the second recess has a first recess depth at a location corresponding to the second actuator and a second recess depth at other locations of the second recess, the first recess depth being greater than the second recess depth. Therefore, other positions of the heat preservation layer have larger thickness, and the refrigerator has better heat preservation effect.

In some embodiments, at least one heat dissipation channel is arranged in the heat insulation layer, one end of the heat dissipation channel is communicated with the inner wall surface of the second concave part, and the other end of the heat dissipation channel is communicated with the top wall surface or the bottom wall surface of the heat insulation layer; the second shell is provided with a heat dissipation hole, and the heat dissipation hole is opposite to the heat dissipation channel. Like this, through ventilative guard piece, can realize the circulation of air between second depressed part and the outside air, optimize the radiating effect on the one hand, avoid the overheated second exciter, on the other hand, the second casing vibration in-process, the air resistance that receives is less the vibration amplitude of second casing great, and the refrigerator can have great acoustic pressure level. Meanwhile, the ventilation protective piece can isolate foreign matters such as water, dust and the like outside the heat dissipation channel, and has good protective performance.

In some embodiments, the refrigerator is further provided with a first ventilation guard for preventing foreign objects from entering the heat dissipation channel. The first ventilation protection piece can effectively protect the second concave part so as to prevent dust and other foreign matters from entering the heat dissipation channel and the second concave part.

In some embodiments, the projection shape of the second concave portion on the second housing is rectangular, circular or elliptical, and can be designed according to requirements, so long as the projection area requirement of the second concave portion can be met.

In some embodiments, the second actuator is spaced from the center of the second recess in a direction parallel to the second housing. Therefore, the second shell can be excited to generate more resonance modes, so that the resonance frequency range of sound emitted by the second shell is wider, and the sound emitted by the second shell can obtain a larger sound pressure level in a wider frequency range. Meanwhile, the regular standing waves generated by the sound emitted by the second shell can be avoided, and the distortion of the sound is reduced.

In some embodiments, the controller; the input end of the first high-pass filter 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 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 second high-pass filter is electrically connected with the controller and is used for filtering sound wave signals lower than preset frequency; the input end of the second low-pass filter is electrically connected with the controller and is used for filtering sound wave signals with frequency higher than a preset frequency; and the output ends of the first low-pass filter and the second low-pass filter are respectively and electrically connected with the input end of the first summing module. The first summation module is used for carrying out audio mixing processing on the low-frequency signals of which the two parts are lower than the preset frequency, so that the problem that the sounds emitted by the refrigerator are negligent is avoided.

In some embodiments, the input of the first delay module is electrically connected to the output of the first summing module; the output end of the first high-pass filter and the output end of the first delay module are electrically connected with the input end of the second summing module, and the output end of the second summing module is electrically connected with the first exciter; and the output end of the third summing module is electrically connected with the second exciter.

Namely, by carrying out time delay processing on the low-frequency signal lower than the preset frequency, the user is difficult to perceive the sound source position of the low-frequency signal, and the frequency response curves of the first exciter and the second exciter on the refrigerator in the range higher than the preset frequency are approximately overlapped, so that the user is difficult to perceive the position of the sound source of the refrigerator, and the perception sensitivity of the user on the position of the sound source of the refrigerator is reduced.

In some embodiments, the case includes a storage part on which the storage area is formed and a switch door on which the first and second actuators are disposed; the refrigerator further comprises a third exciter, wherein the third exciter is arranged on the storage part and used for driving the second shell on the storage part to vibrate and sound. That is, in consideration of the small area of the refrigerator door, it is possible to emit low frequency sound through the third exciter and high frequency sound through the first and second exciters located on the opening and closing door by providing the third exciter at the outer wall surface position of the refrigerator body.

In some embodiments, the refrigerator further comprises a controller; the input end of the third high-pass filter is electrically connected with the controller and is used for filtering sound wave signals lower than preset frequency, and the output end of the third high-pass filter is electrically connected with the first exciter; the input end of the third low-pass filter 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 is electrically connected with the controller and used for filtering sound wave signals lower than preset frequency, and the output end of the fourth high-pass filter is electrically connected with the second exciter; the input end of the fourth low-pass filter is electrically connected with the controller and is used for filtering sound wave signals with frequency higher than a preset frequency; and the output end of the fourth summing module is electrically connected with the third exciter.

In some embodiments, the refrigerator further comprises a woofer for emitting low frequency sounds; the heat preservation layer is provided with a third concave part for accommodating the bass loudspeaker, a sound outlet hole is arranged at a position of the second shell corresponding to the third concave part, and the sound outlet hole is communicated with the inner side and the outer side of the second shell; the refrigerator 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.

In some embodiments, the controller; the input end of the fifth high-pass filter is electrically connected with the controller and is used for filtering sound wave signals lower than preset frequency, and the output end of the fifth high-pass filter is electrically connected with the first exciter; the input end of the fifth low-pass filter 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 is electrically connected with the controller and used for filtering out sound wave signals lower than preset frequency, and the output end of the sixth high-pass filter is electrically connected with the second exciter; the input end of the sixth low-pass filter is electrically connected with the controller and is used for filtering sound wave signals with frequency higher than a preset frequency; and the output end of the fifth low-pass filter and the output end of the sixth low-pass filter are electrically connected with the input end of the fifth addition module, and the output end of the fifth addition module is electrically connected with the woofer.

In some embodiments, the first and second actuators are identical in structure and each comprise a vibratable voice coil; and the heat transfer element is connected with the second shell through the voice coil, the vibration of the voice coil can be transferred to the second shell through the heat transfer element, and the heat generated by the voice coil can be transferred to the second shell through the heat transfer element.

The second shell is not required to be provided with a sound outlet, the first exciter and the second exciter are not exposed in air, the second shell is good in integrity, and good in dustproof and waterproof performance. At the same time, the planar sound production has a relatively flat frequency response relative to the loudspeaker sound production.

And the voice coil loudspeaker voice coil links to each other with the second casing through heat transfer piece, and the heat that generates when the voice coil loudspeaker voice coil vibrates can be through heat transfer piece conduction to the second casing on, at this moment, can take place heat exchange between second casing and the air to make the cooling of second casing, just also realized the heat dissipation cooling to the voice coil loudspeaker voice coil, avoid the voice coil loudspeaker voice coil overheated, lead to the vibration range of voice coil loudspeaker voice coil to diminish.

In some embodiments, the voice coil is made of a heat conducting material, so as to improve the heat exchange amount between the voice coil and the heat transfer element, and the heat dissipation effect of the voice coil is better.

In some embodiments, the heat transfer element is a viscous heat-conducting glue, which facilitates assembly between the voice coil and the second housing and has high fixing stability.

In some embodiments, the refrigerator further includes a support having: the voice coil is connected with the plug-in part in a plug-in way; and the communication part is communicated with the plug-in part, penetrates through one side of the support piece, which faces the second shell, and is filled with the heat transfer piece.

Like this, all can bond fixedly through the heat transfer piece between support piece and the second casing, between second casing and the voice coil loudspeaker voice coil, for the fixed mode that voice coil loudspeaker voice coil and second casing directly link to each other, the area of contact between support piece and the second casing is great, and support stability is higher. And the heat generated by the voice coil can be transferred to the second shell through the heat transfer element, so that the heat dissipation effect is good.

In some embodiments, the radial dimension of the end of the communication portion near the second housing is greater than the radial dimension of the end of the plug portion remote from the second housing. Thus, the bonding area between the support piece and the second shell is larger, and the fixing stability between the support piece and the second shell is higher.

In some embodiments, the refrigerator further comprises a sound plate attached to one side of the second housing corresponding to the recess, and the voice coil is fixedly connected to the sound plate, wherein the damping of the sound plate is greater than that of the second housing. Therefore, the rigidity of the second shell can be improved, the frequency range of sound emitted by the second shell can be enlarged, high-frequency sharp sound is avoided, and the sound distortion caused by overlarge fluctuation of the frequency response of the second shell is avoided.

In some embodiments, the sound board includes a sound board body and a heat conducting portion for conducting heat, the voice coil is connected to the heat conducting portion, and the heat transfer member is disposed between the second housing and the heat conducting portion and between the heat conducting portion and the voice coil, respectively. Thus, the voice coil can also dissipate heat through the sound-emitting plate under the condition of optimizing the sound emitted by the second housing.

In some embodiments, the sound board is a sandwich board, and the sound board comprises a core material and a skin, wherein the skin is attached to two opposite sides of the core material; the skin is a heat conduction material piece, and the heat conduction part is arranged at the position of the core material corresponding to the voice coil.

The sandwich board is low in cost and easy to obtain, the rigidity of the second shell can be improved, and the tone quality of sound emitted by the second shell can be optimized. Meanwhile, the skin at the positions of the core material corresponding to the voice coil and at the two sides of the core material are heat-conducting material pieces, and heat of the voice coil can be conducted to the sounding board, so that the voice coil can be cooled.

In some embodiments, the sound board comprises an avoidance portion, the avoidance portion is communicated with two sides of the sound board, and the voice coil can penetrate through the avoidance portion and is fixedly connected with the second shell. Therefore, the voice coil can directly exchange heat with the second shell, and the heat dissipation effect is good.

A second aspect of the embodiments of the present invention provides a sound generating apparatus, including a plurality of sound generating elements, where a loudness difference of sound waves generated by the plurality of sound generating elements at each octave is less than 3dB. Wherein, it can control the sound wave of the sound emitting device in different ways according to the kind of the sound emitting device. By way of example, the size of the recess in which the exciter is accommodated, the control signal control method of the exciter, the setting of the woofer, 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 mode, 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, the user experience is optimized, and the application range is wider.

In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, other technical problems that can be solved by the refrigerator provided by the embodiment of the present invention, other technical features included in the technical solutions, and beneficial effects caused by the technical features of the technical solutions, further detailed description will be made in the detailed description of the embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following descriptions are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic view of a structure of a related art refrigerator;

FIG. 2 is a plot of the frequency response of the sound from the first driver and the sound from the second driver of FIG. 1;

fig. 3 is a schematic structural view of a second recess in a refrigerator according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram II of a second recess in the refrigerator according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram III of a second recess in a refrigerator according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a second recess in a refrigerator according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a second recess in a refrigerator according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram sixth of a second recess in a refrigerator according to an embodiment of the present invention;

Fig. 9 is a schematic diagram seventh of a structure of a second recess in a refrigerator according to an embodiment of the present invention;

Fig. 10 is a schematic structural diagram eight of a second recess in a refrigerator according to an embodiment of the present invention;

fig. 11 is a system architecture diagram of a refrigerator according to an embodiment of the present invention;

Fig. 12 is a schematic structural view of a refrigerator according to an embodiment of the present invention;

fig. 13 is a system architecture diagram of the refrigerator of fig. 12;

fig. 14 is a schematic structural diagram II of a refrigerator according to an embodiment of the present invention;

Fig. 15 is a system architecture diagram of the refrigerator of fig. 14;

FIG. 16 is a schematic view of a refrigerator according to an embodiment of the present invention, wherein the first and second actuators include voice coils;

FIG. 17 is a schematic view of the actuator of FIG. 16;

FIG. 18 is a schematic view of the support member of FIG. 17;

FIG. 19 is a second schematic view of the support member of FIG. 17;

FIG. 20 is a cross-sectional view of the support of FIGS. 18 and 19;

FIG. 21 is a schematic view of the second housing in FIG. 16 with a reinforcing plate;

FIG. 22 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of FIG. 21;

fig. 23 is a second schematic structural view of the second housing in fig. 16 with a reinforcing plate.

Reference numerals:

1: a refrigerator;

11: a first exciter; 12: a second exciter; 121: a voice coil; 122: a flick wave; 13: a third exciter; 14: a woofer;

20: a case; 21: a heat preservation layer; 211: a second concave portion; 212: a heat dissipation channel; 22: a first housing; 23: a second housing; 231: a second vibration part; 24: a first switch door; 25: a second switch door; 26: a display screen; 27: a control board;

30: a heat transfer member;

40: a support; 41: a plug-in part; 42: a communication section;

50: a sound board; 51: a sound board body; 52: a heat conduction part; 53: a core material;

61: a first high pass filter; 62: a first low pass filter; 63: a second high pass filter; 64: a second low pass filter; 65: a first summing module; 66: a first delay module; 67: a second summing module; 68: a third summing module; 691: a first amplifier; 692: a second amplifier;

71: a third high pass filter; 72: a third low pass filter; 73: a fourth high pass filter; 74: a fourth low pass filter; 75: a fourth summing module; 761: a third amplifier; 762: a fourth amplifier; 763: a fifth amplifier;

81: a fifth high pass filter; 82: a fifth low pass filter; 83: a sixth high pass filter; 84: a sixth low pass filter; 85: a fifth summation module; 861: a sixth amplifier; 862: a seventh amplifier; 863: and an eighth amplifier.

Detailed Description

In order to make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the related art, a refrigerator has a need to sound or perform voice interaction with a user. For example, when a user cooks, he can inquire a menu through the refrigerator or play a television play through the refrigerator, and at this time, the refrigerator can receive a voice command of the user and play information to be inquired by the user through voice.

Fig. 1 is a schematic view of a structure of a related art refrigerator. Fig. 2 is a plot of the frequency response of the sound from the first driver and the sound from the second driver in fig. 1. Referring to fig. 1 and 2, in order to enhance the user experience, a 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. 2, the two drivers approximately overlap in 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 a 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 embodiment of the present application provides a refrigerator including 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.

Fig. 3 is a schematic structural view of a second recess in a refrigerator according to an embodiment of the present invention. Fig. 4 is a schematic structural diagram of a second recess in the refrigerator according to the embodiment of the present invention.

Referring to fig. 3 and 4, the present embodiment provides a refrigerator 1, which includes a case 20, wherein a storage area is provided in the case 20; the box 20 comprises a heat preservation layer 21, a first shell 22 and a second shell 23, wherein the first shell 22 and the second shell 23 are respectively attached to the inner side and the outer side of the heat preservation layer 21.

Specifically, the refrigerator 1 is a refrigerating apparatus for storing articles, for providing a constant low temperature environment for the articles stored therein.

The refrigerator 1 may have a freezer compartment, a refrigerator compartment, a temperature regulating compartment, etc., according to the use requirements. The refrigerator 1 comprises a refrigerator body 20, wherein the refrigerator body 20 comprises a storage part and an opening and closing door, storage areas such as a freezing compartment, a refrigerating compartment and a temperature regulating compartment are formed on the storage part, and the opening and closing door is connected with the storage part and is used for sealing the freezing compartment, the refrigerating compartment and the temperature regulating compartment. Of course, the number of the doors of the refrigerator 1 can be three, and the refrigerator can cover the freezing compartment, the refrigerating compartment and the temperature regulating compartment respectively.

Fig. 12 is a schematic structural view of a refrigerator according to an embodiment of the present invention. 14 is a second schematic structural diagram of the refrigerator according to the embodiment of the present invention. Referring to fig. 12 and 14, in some embodiments, the refrigerator 1 includes four switch doors as an example. 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 refrigerator 1 comprises the heat preservation layer 21, the heat insulation performance of the heat preservation layer 21 is good, and heat exchange between the inside of the refrigerator 1 and the outside of the refrigerator 1 can be avoided, so that a freezing compartment, a refrigerating compartment and a temperature regulating compartment in the refrigerator 1 are maintained in a preset temperature range. The heat-insulating layer 21 may be made of polyurethane and formed by a foaming process.

The heat preservation 21 inboard is equipped with first casing 22, and first casing 22 sets up respectively on storing portion and switch door. The first housing 22 may be plastic or the like, is easy to clean, and is resistant to acid and alkali corrosion.

The second housing 23 is provided on the storage part and the opening and closing door, respectively. The material of the second housing 23 may be glass, plastic, steel, or the like. I.e. the second housing 23 on the storage part may be glass, plastic or the like. The second casing 23 of the switch door may be made of glass, plastic, or the like. The material of the storage part and the second casing 23 on the switch door may be the same or different.

In some embodiments, the refrigerator 1 further comprises an actuator assembly comprising a first actuator 11 and a second actuator 12. In this way, the first exciter 11 and the second exciter 12 may constitute a stereo system, optimizing the user experience.

The first actuator 11 and the second actuator 12 may be provided at the storage part at the same time, or at the opening and closing door at the same time. For example, referring to fig. 12 and 14, the two opening and closing doors corresponding to the refrigerator compartment include a first opening and closing door 24 and a second opening and closing door 25, and the first and second actuators 11 and 12 may be disposed on the first and second opening and closing doors 24 and 25, respectively.

In some embodiments, the first and second actuators 11, 12 may be any one of magnetostrictive actuators, electromagnetic actuators, piezoelectric actuators. That is, the types of the first actuator 11 and the second actuator 12 may be the same or different.

In some embodiments, the heat-insulating layer 21 is provided with a first concave portion and a second concave portion 211, the first concave portion and the second concave portion 211 are arranged at intervals, the first exciter 11 is located in the first concave portion, and the second exciter 12 is located in the second concave portion 211; the second housing 23 covers the opening of the first recess and the opening of the second recess 211, respectively.

In this way, the first recess portion and the second recess portion 211 are respectively sealed by the second housing 23, and enclose a sealed cavity, so as to avoid foreign matters such as dust, water and the like from outside from depositing on the first exciter 11 and the second exciter 12, and the service lives of the first exciter 11 and the second exciter 12 are longer.

In some embodiments, referring to fig. 3 and 4, a portion of the second housing 23 corresponding to the first recess portion constitutes a first vibration portion (not shown), and a portion of the second housing 23 corresponding to the second recess portion 211 constitutes a second vibration portion 231; the first exciter 11 is connected with the first vibration part and is used for driving the first vibration part to vibrate and sound, and the second exciter 12 is connected with the second vibration part 231 and is used for driving the second vibration part 231 to vibrate and sound.

Wherein the first and second concave portions 211 are spaced apart from each other such that the first and second vibration portions 231 are non-connected two portions of the second housing 23. The first exciter 11 links to each other with first vibrating portion to drive first vibrating portion vibration sound production, the second exciter 12 links to each other with second vibrating portion 231 vibration to drive second vibrating portion 231 vibration sound production, refrigerator 1 through the face vibration sound production promptly, the user is comparatively insensitive to the sound source perception of face vibration sound production, even the user is located the different positions department of refrigerator 1, also can not perceive sound source position and change, has optimized user's use experience.

In some embodiments, the first vibration portion and the second vibration portion 231 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 231 at each octave are both 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 a certain frequency position, it may happen that the difference in loudness between the sound wave emitted by the first vibration portion and the sound wave emitted by the second vibration portion 231 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 231 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 negligence is large and the sound source position is negligence and negligence is far.

In some embodiments, referring to fig. 1, the refrigerator 1 includes a control board 27, and the first and second exciters 11 and 12 are electrically connected to the control board 27, respectively, to control start and stop of the first and second exciters 11 and 12, etc. through the control board 27.

In some embodiments, the refrigerator 1 is further provided with a display screen 26 for displaying image information, and the display screen 26 is electrically connected with a control board 27. For ease of assembly, the control board 27, display 26, etc. will typically be centrally located where one of the actuators is located.

In some embodiments, the refrigerator 1 includes a bracket (not shown) and the bracket and the control board 27 are both positioned in the first recess, the bracket being fixed to the first vibration part, and the control board 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 connected to the second housing 23 by means of adhesion, screwing, or the like. For example, the bracket may be fixed to the second housing 23 by double-sided tape or foam.

It will be appreciated that referring to fig. 1, the second recess 211 is only configured to accommodate the second actuator 12, and the first recess accommodates the first actuator 11, the bracket, the display screen, etc., so that the projection area of the first recess on the second housing 23 is larger than the projection area of the second recess 211 on the second housing 23. That is, the area of the first vibration part is larger than that of the second vibration part 231, and the first vibration part may have a larger vibration amplitude than the second vibration part 231.

In some embodiments, to facilitate servicing and replacement of the display, control panel, etc., the portion of the second housing 23 associated with the first actuator 11 is typically removable. Illustratively, when the first actuator 11 is fixed to the first switch door 24 in fig. 1, the second housing 23 corresponding to the first switch door 24 is detachable, and the second housing 23 may be fixed to the first housing 22 in a frame-fitting manner. That is, an air gap is provided between the second housing 23 on the first opening and closing door 24 and the heat insulating layer 21 on the first opening and closing door 24.

On the one hand, the first actuator 11 can drive the second casing 23 on the switch door to vibrate, the vibration area is far larger than the area of the second vibration part 231, and the first actuator 11 can push a larger volume of air relative to the second actuator 12. On the other hand, the air gap between the heat insulating layer 21 and the second casing 23 communicates with the first recess, which corresponds to an increase in the equivalent volume of the first recess, and the first recess has a larger volume than the second recess 211, and the air resistance received when the first vibration part vibrates is smaller than the air resistance received when the second vibration part 231 vibrates.

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 part may push a larger volume of air relative to the second vibration part 231 than the second vibration part 231 has a larger area and a larger vibration amplitude, and the first vibration part may emit a better low frequency sound relative to the second vibration part 231. For example, referring to fig. 2, at a low frequency range below 400Hz, the loudness of the first vibration portion on the first switch door 24 is greater than the loudness of the second vibration portion 231 on the second switch door 25. 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 231.

This also tends to cause the sound source perceived by the user to be biased toward the first actuator 11, and the sound heard by the user may be changed in size, so that the user may perceive the sound source as being too far from being too near when the user is located at a different position of the refrigerator 1.

In some embodiments, the bass sound of the second vibration portion 231 may be improved by improving the amount of air that the second vibration portion 231 can push. For example, when the amounts of air that the first and second vibration parts 231 can push are approximately the same, the first and second vibration parts 231 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 23, i.e., an area of the first vibration portion, and the second recess portion 211 has a second projected area on the second housing 23, an area of the second vibration portion 231, which is smaller than the first projected area, i.e., an area of the second vibration portion 231 is smaller than an area of the first vibration portion.

And the second vibration part 231 has a larger vibration amplitude than the first vibration part, the first and second vibration parts 231 may push approximately the same volume of air, and the first and second vibration parts 231 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 the size of the bracket, the weight of the display screen, and the like, which is not limited in this embodiment.

In some embodiments, referring to fig. 3, the recess depths of the second recess 211 are the same at different positions, i.e., the second recess 211 has a groove-like structure with equal depth, and the second recess 211 is easy to form and has low manufacturing cost.

In some embodiments, referring to fig. 4, the second recess 211 has a first recess depth at a position corresponding to the second actuator 12, and has a second recess depth at other positions of the second recess 211, the first recess depth being greater than the second recess depth.

Thus, the second recess 211 is stepped, and the depth of the second recess 211 is greater at the position corresponding to the second actuator 12, and is smaller at the other positions of the second recess 211. The thickness of the insulating layer 21 at the position corresponding to the second actuator 12 is smaller, and the portion of the insulating layer 21 corresponding to the other position of the second recess 211 has a larger thickness, so that the insulating effect of the insulating layer 21 is better.

Fig. 5 is a schematic structural diagram III of a second recess in a refrigerator according to an embodiment of the present invention. Fig. 6 is a schematic structural diagram of a second recess in a refrigerator according to an embodiment of the present invention.

In some embodiments, referring to fig. 5 and 6, at least one heat dissipation channel 212 is disposed in the heat insulation layer 21, one end of the heat dissipation channel 212 is communicated with the inner wall surface of the second recess 211, and the other end of the heat dissipation channel 212 is communicated with the top wall surface or the bottom wall surface of the heat insulation layer 21; the second housing 23 is provided with a heat dissipation hole, which is disposed opposite to the heat dissipation channel 212.

One end of the heat dissipation channel 212 is communicated with the second concave portion 211, and the other end penetrates through the outer wall surface of the heat insulation layer 21. Meanwhile, the second housing 23 is provided with a heat dissipation hole (not shown) opposite to the heat dissipation channel 212, so that the second recess 211 is communicated with the outside air through the heat dissipation channel 212, and the heat generated by the second exciter 12 can be conducted to the outside air through the heat dissipation channel 212, so that the heat dissipation effect of the second exciter 12 is good, and the reduction of the vibration amplitude of the second vibration part 231 due to the overheating of the second exciter 12 is avoided.

Meanwhile, in the process of vibrating the second housing 23, the air in the second recess 211 may circulate with the external air through the heat dissipation channel 212, the air resistance of the second housing 23 is small, the vibration amplitude of the second housing 23 is large, and the sound emitted by the second vibration part 231 has a large sound pressure level.

In some embodiments, the number of the heat dissipation channels 212 may be plural, so that the communication area between the second recess 211 and the outside air is larger, which is conducive to dissipating more heat through the heat dissipation channels 212, and the heat dissipation effect is better.

The heat radiation holes may be provided at any position of the second housing 23, for example, the heat radiation holes are provided on the front side wall of the refrigerator 1. In some embodiments, the heat dissipation holes may be disposed on the top wall or the bottom wall of the second housing 23, that is, the heat dissipation holes may be hidden at the bottom or the top of the refrigerator 1, so that the user is difficult to see the heat dissipation holes from the appearance perspective during the use of the refrigerator 1, and the appearance of the refrigerator 1 is complete.

And when the heat dissipation holes are provided at the top or bottom of the refrigerator 1, the heat dissipation channels 212 may extend in a vertical direction or in an inclined direction to achieve convection of the hot air in the second recess 211 and the cold air outside the refrigerator 1 by using a chimney effect, thereby improving the heat dissipation rate of the second exciter 12.

It will be appreciated that when the second recess 211 communicates with the outside air through the heat dissipation channel 212, the second actuator 12 is exposed to the air through the heat dissipation channel 212, and in some embodiments, the refrigerator 1 is further provided with a first ventilation protection (not shown) for preventing foreign objects from entering the heat dissipation channel 212.

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 concave part 211 and the cold air outside the refrigerator 1. Meanwhile, the first ventilation protection member can also prevent external foreign matters, such as water, dust, filth and the like, from entering the second concave portion 211 through the heat dissipation channel 212, i.e. the first ventilation protection member can form better protection for the second exciter 12.

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 1 for periodic cleaning or replacement of the first air permeable guard.

Fig. 7 is a schematic diagram of a second recess in a refrigerator according to an embodiment of the present invention. Fig. 8 is a schematic structural diagram of a second recess in a refrigerator according to an embodiment of the present invention. Fig. 9 is a schematic diagram seventh of a structure of a second recess in a refrigerator according to an embodiment of the present invention.

In some embodiments, referring to fig. 7 to 9, the projection shape of the second recess 211 on the second housing 23 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 211 can be designed according to the requirement as long as the projection area requirement of the second recess 211 can be met.

The projection shape of the second recess 211 on the second housing 23 may also be an irregular geometric shape. Fig. 10 is a schematic structural diagram eight of a second recess portion in a refrigerator according to an embodiment of the present invention, referring to fig. 10, the second recess portion 211 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 231 is wider, and the sound emitted by the second vibration part 231 can obtain a larger sound pressure level in a wider frequency range.

In some embodiments, referring to fig. 5 to 10, the second exciter 12 and the center of the second recess 211 are spaced apart in a direction parallel to the second housing 23. In this way, the second vibration part 231 can be excited to generate more resonance modes, so that the resonance frequency range of the sound emitted by the second vibration part 231 is wider, and the sound emitted by the second vibration part 231 can obtain a larger sound pressure level in a wider frequency range. Meanwhile, the sound generated by the second vibration part 231 can be prevented from generating regular standing waves, and the distortion of the sound can be reduced.

In some embodiments, the following manner may be adopted, so that the user cannot perceive the loudness difference between the sound wave emitted by the first vibration part and the sound wave emitted by the second vibration part 231, and the perception sensitivity of the user to the sound source is reduced.

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 231 is greater than 3dB per octave, the following embodiment may be adopted, so that the user cannot perceive the difference in loudness between the sound wave emitted from the first vibration portion and the sound wave emitted from the second vibration portion 231.

Fig. 11 is a system architecture diagram of a refrigerator according to an embodiment of the present invention. Referring to fig. 11, in some embodiments, the low frequency sounds of the first and second drivers 11 and 12 may also be optimized by controlling the input signals of the first and second drivers 11 and 12 on the basis of fig. 1.

Specifically, the refrigerator 1 includes a controller; the input end of the first high-pass filter 61 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 62 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 second high-pass filter 63 is electrically connected with the controller and is used for filtering out sound wave signals lower than a preset frequency; the input end of the second low-pass filter 64 is electrically connected to the controller, and is used for filtering out the acoustic wave signals higher than the preset frequency.

The first high-pass filter 61, the first low-pass filter 62, the second high-pass filter 63, and the second low-pass filter 64 may be any types known to those skilled in the art, and the embodiment is 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 231 is large, and may be 400Hz, for example. Thus, the first high-pass filter 61 and the second high-pass filter 63 can pass high-frequency control signals higher than 400Hz. The first low pass filter 62 and the second low pass filter 64 may pass low frequency control signals below 400Hz.

In some embodiments, the refrigerator 1 includes a first summing module 65, and outputs of the first low pass filter 62 and the second low pass filter 64 are electrically connected to inputs of the first summing module 65, respectively.

I.e. the low frequency control signals below 400Hz passed by the first and second low pass filters 62, 64 are subjected to a mixing process by the first summing module 65.

The addition of the first addition module 65 may be in a manner well known in the art and is performed by an ARM processor or by a digital signal Processing (DIGITAL SIGNAL Processing) processor.

In some embodiments, the refrigerator 1 further comprises a first delay module 66, an input of the first delay module 66 being electrically connected to an output of the first summing module 65; the output end of the first high-pass filter 61 and the output end of the first delay module 66 are electrically connected with the input end of the second summing module 67, and the output end of the second summing module 67 is electrically connected with the first exciter 11; the output of the second high pass filter 63 and the output of the first delay block 66 are both electrically connected to the input of the third summing block 68, and the output of the third summing block 68 is electrically connected to the second exciter 12.

The low-frequency control signal added by the first adding module 65 is output to the first exciter 11 and the second exciter 12 in two paths, that is, the high-frequency control signal output by the first high-pass filter 61 is added by the second adding module 67 and output to the first exciter 11, and the high-frequency control signal output by the second high-pass filter 63 is added by the third adding module 68 and output to the second exciter 12.

In some embodiments, the outputs of the second and third summing modules 67 and 68 may be connected to first and second amplifiers 691 and 692, respectively, for amplifying control signals input to the first and second actuators 11 and 12, respectively.

Thus, the low frequency control signals below 400Hz input by the first and second drivers 11, 12 are identical, and the high frequency control signals above 400Hz input by the first and second drivers 11, 12 are approximately identical. In theory, the loudness differences per octave of the sound excited by the first exciter 11 and the sound excited by the second exciter 12 are both less than 3dB.

The refrigerator 1 further includes a first delay module 66 that delays the added low frequency control signal so that there is a phase difference between the low frequency control signal and the high frequency control signal by the first delay module 66 in consideration of the difference of the first and second vibration parts 231 and the assembly difference at the installation positions of the first and second exciters 11, 12.

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 through the vibration of the surface of the second shell 23, the user is difficult to perceive the direction of the sound, for the low-frequency sound lower than 400Hz, the user can only hear the volume superposition of the two low-frequency sounds lower than 400Hz, namely the problem of negligence of sound cannot occur, the user cannot perceive the direction of the sound, the problem of negligence and negligence of the sound source when the user perceives different positions cannot occur, and the perception sensitivity of the user to the position of the sound source of the refrigerator 1 is reduced.

In some embodiments, the refrigerator 1 may simultaneously improve the control signals of the second recess 211 and the first and second actuators 11 and 12.

Fig. 12 is a schematic structural view of a refrigerator according to an embodiment of the present invention. Fig. 13 is a system architecture diagram of the refrigerator of fig. 12.

In some embodiments, referring to fig. 12 and 13, the refrigerator 1 may further be provided with an exciter capable of emitting bass sound based on fig. 1, specifically, the first exciter 11 and the second exciter 12 are provided on the switch door; the refrigerator 1 further comprises a third exciter 13, wherein the third exciter 13 is arranged on the storage part and is used for driving the second shell 23 on the storage part to vibrate and sound. That is, in view of the small area of the opening and closing door, it is possible to emit low frequency sound through the third exciter 13 and high frequency sound through the first exciter 11 and the second exciter 12 located on the opening and closing door by providing the third exciter 13 at the outer wall surface position of the case 20.

In some embodiments, the third actuator 13 may be one or more. For example, referring to fig. 12, a third exciter 13 may be disposed at the top of the storage portion, and a third exciter 13 may be disposed at the side of the storage portion.

In some embodiments, the refrigerator 1 further comprises a controller; the input end of the third high-pass filter 71 is electrically connected with the controller and is used for filtering sound wave signals lower than a preset frequency, and the output end of the third high-pass filter 71 is electrically connected with the first exciter 11; the input end of the third low-pass filter 72 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 73 is electrically connected with the controller and is used for filtering sound wave signals lower than a preset frequency, and the output end of the fourth high-pass filter 73 is electrically connected with the second exciter 12; the input end of the fourth low-pass filter 74 is electrically connected to the controller, and is used for filtering out the acoustic wave signals higher than the preset frequency.

The third high-pass filter 71, the third low-pass filter 72, the fourth high-pass filter 73 and the fourth low-pass filter 74 may be of any kind known to those skilled in the art, and the present embodiment is 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 231 is large, and may be 400Hz, for example. In this way, the third high-pass filter 71 and the fourth high-pass filter 73 can pass high-frequency control signals higher than 400Hz. The third low pass filter 72 and the fourth low pass filter 74 may pass low frequency control signals below 400Hz.

In some embodiments, the refrigerator 1 includes a fourth summing module 75, the output of the third low pass filter 72 and the output of the fourth low pass filter 74 are both electrically connected to an input of the fourth summing module 75, and an output of the fourth summing module 75 is electrically connected to the third actuator 13. That is, the fourth summing module 75 mixes the low frequency control signals of 400Hz or less passing through the third low pass filter 72 and the fourth low pass filter 74, and sends the summed control signals to the third exciter 13 to control the third exciter 13 to emit low frequency sounds of 400Hz or less.

In some embodiments, the fourth adding module 75 may be an existing adding mode, and the adding operation is low, and the hardware requirement of the refrigerator 1 is low, by Processing with an ARM processor or a digital signal Processing (DIGITAL SIGNAL Processing) processor.

In some embodiments, the outputs of the third high pass filter 71, the fourth high pass filter 73 and the fourth summing module 75 may be connected to a third amplifier 761, a fourth amplifier 762 and a fifth amplifier 763, respectively, for amplifying the control signals input to the first, second and third drivers 11, 12 and 13, respectively.

In some embodiments, the refrigerator 1 may modify the second recess 211 while providing the third actuator 13 on the storage part, which is not limited.

Fig. 14 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention. Fig. 15 is a system architecture diagram of the refrigerator of fig. 14.

In some embodiments, the refrigerator 1 may further be provided with a speaker capable of emitting low-frequency sound on the basis of fig. 1, and in particular, the refrigerator 1 further includes a low-frequency speaker 14, where the low-frequency speaker 14 is used to emit low-frequency sound; the heat preservation layer 21 is provided with a third concave part for accommodating the woofer 14, a sound outlet hole is arranged at the position of the second shell 23 corresponding to the third concave part, and the sound outlet hole is communicated with the inner side and the outer side of the second shell 23;

The woofer 14 may be a woofer, which is well known to those skilled in the art, and which emits bass sounds. The insulating layer 21 is provided with a third recess for accommodating the woofer 14, and the third recess may be disposed at any position of the case 20. For example, the woofer 14 may be disposed at the top or bottom of the cabinet 20.

The second housing 23 is provided with a sound outlet so that sound emitted from the woofer 14 can be transmitted to the outside of the refrigerator 1 through the sound outlet. 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 1 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 air permeability of the second ventilative protector is better, and it does not influence the mutual circulation between the hot air in the third depressed part and the refrigerator 1 outside cold air. 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 14 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 1 for periodic cleaning or replacement of the second air permeable guard.

In some embodiments, the refrigerator 1 further comprises a controller; the input end of the fifth high-pass filter 81 is electrically connected with the controller and is used for filtering sound wave signals lower than a preset frequency, and the output end of the fifth high-pass filter 81 is electrically connected with the first exciter 11; the input end of the fifth low-pass filter 82 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 83 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 sixth high-pass filter 83 is electrically connected with the second exciter 12; the input end of the sixth low-pass filter 84 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 81, the fifth low-pass filter 82, the sixth high-pass filter 83, and the sixth low-pass filter 84 may be of any type known to those skilled in the art, and the present embodiment is 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 231 is large, and may be 400Hz, for example. In this way, the fifth high-pass filter 81 and the sixth high-pass filter 83 can pass high-frequency control signals higher than 400Hz. The fifth low pass filter 82 and the sixth low pass filter 84 may pass low frequency control signals below 400Hz.

In some embodiments, the output of the fifth low pass filter 82 and the output of the sixth low pass filter 84 are both electrically connected to the input of the fifth summing module 85, and the output of the fifth summing module 85 is electrically connected to the woofer 14. That is, the fifth low-pass filter 82 and the sixth low-pass filter 84 pass through the fifth summation module 85 to mix the low-frequency control signals below 400Hz, and the summed control signals are sent to the woofer 14 to control the woofer 14 to emit low-frequency sounds below 400 Hz.

In some embodiments, the adding mode of the fifth adding module 85 may be an existing adding mode, and the adding operation amount is low, and the hardware requirement of the refrigerator 1 is low, by Processing through an ARM processor or through a digital signal Processing (DIGITAL SIGNAL Processing) processor.

In some embodiments, the outputs of the fifth high pass filter 81, the sixth high pass filter 83 and the fifth summing module 85 may be connected to a sixth amplifier 861, a seventh amplifier 862 and an eighth amplifier 863, respectively, for amplifying the control signals input to the first exciter 11, the second exciter 12 and the woofer 14, respectively.

In some embodiments, the refrigerator 1 may be modified from the second recess 211 while providing the woofer 14, which is not limited.

Fig. 16 is a schematic structural view of a refrigerator according to an embodiment of the present invention, in which the first actuator and the second actuator include voice coils. Fig. 17 is a schematic view of the actuator of fig. 16.

In some embodiments, referring to fig. 16 and 17, the first actuator 11 and the second actuator 12 are identical in structure and are both electromagnetic actuators. The electromagnetic actuator includes a vibratable voice coil 121, a spring 122, 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 121 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 damper 122 is enclosed outside the voice coil 121, and for example, the damper 122 may be connected to an outer wall surface of the voice coil 121. The elastic wave 122 is an elastic member, and can elastically deform along with vibration sound of the voice coil 121, so as to avoid deflection of the voice coil 121 during reciprocating movement.

In some embodiments, the refrigerator 1 further includes a heat transfer member 30, the voice coil 121 is connected to the second housing 23 through the heat transfer member 30, and vibration of the voice coil 121 may be transferred to the second housing 23 through the heat transfer member 30 to realize vibration sound production of the second housing 23.

In some embodiments, the heat transfer element 30 is a heat conducting material, and the heat generated by the voice coil 121 can be transferred to the second housing 23 through the heat transfer element 30.

The material of the voice coil 121 may be kraft paper, aromatic polyamide, etc. known to those skilled in the art. In some embodiments, the voice coil 121 is a heat conductive material, such as aluminum, with a lower weight and a higher heat conductivity to increase the amount of heat exchange between the heat transfer member 30 and the voice coil 121.

Thus, the heat generated by the voice coil 121 can be effectively transferred to the heat transfer element 30, the heat transfer element 30 is heated, heat exchange occurs between the heat transfer element 30 and the second shell 23, the heat on the heat transfer element 30 is transferred to the second shell 23, the second shell 23 is in contact with air, and is subjected to heat exchange and temperature reduction with the air, so that the temperature of the heat transfer element 30 is reduced, the heat of the voice coil 121 can be continuously transferred to the heat transfer element 30, the heat dissipation effect of the voice coil 121 is better, the voice coil 121 is prevented from overheating, and the vibration amplitude of the voice coil 121 is reduced.

The heat transfer member 30 may be a metal member such as a bolt or a screw. In some embodiments, the heat transfer member 30 has adhesive heat conductive adhesive, so that the voice coil 121 can be fixed on the second housing 23 by coating the heat conductive adhesive between the voice coil 121 and the second housing 23, which is easy to assemble and has high fixing stability.

In some embodiments, the heat transfer element 30 may be a silicone heat conductive adhesive, a polyurethane heat conductive electrically conductive adhesive, or the like.

Fig. 18 is a schematic view of the support member of fig. 17. Fig. 19 is a second schematic structural view of the support member in fig. 17. Fig. 20 is a cross-sectional view of the support of fig. 18 and 19.

Referring to fig. 16 to 20, considering that the voice coil 121 has a thin-walled cylindrical structure, the end surface area of the voice coil 121 is small, and in some embodiments, the refrigerator 1 further includes a support 40, the support 40 having: a plug-in portion 41, the voice coil 121 being plugged into the plug-in portion 41; and a communication portion 42, the communication portion 42 communicates with the insertion portion 41, and the communication portion 42 penetrates a side of the support member 40 facing the second housing 23, and the heat transfer member 30 is filled in the insertion portion 41 and the communication portion 42.

The support member 40 may have a columnar structure or a cylindrical structure as shown in fig. 18 to 20. The insertion portion 41 is provided on one of the end surfaces of the support 40, and the voice coil 121 and the insertion portion 41 are inserted into each other and fixed by adhesion through the heat transfer member 30, so that the fixing stability between the voice coil 121 and the support 40 is high. And the voice coil 121 and the heat transfer member 30 are in contact with each other, heat on the voice coil 121 can be effectively transferred to the heat transfer member 30.

The opposite end surface of the support member 40 contacts the second housing 23, and the contact area between the support member 40 and the second housing 23 is large and the support stability is high with respect to the end surface area of the voice coil 121.

The support member 40 is further provided with a communication portion 42, one end of the communication portion 42 is communicated with the insertion portion 41, and the other end penetrates through the end face of the support member 40, so that the heat transfer member 30 can flow into the communication portion 42 through the insertion portion 41, and the support member 40 and the second housing 23 are adhered and fixed. At this time, the heat transfer member 30 is fixedly connected to the second housing 23 and the voice coil 121, respectively, and heat of the voice coil 121 can be transferred to the second housing 23 through the heat transfer member 30.

In some embodiments, the radial dimension of the end of the communication portion 42 near the second housing 23 is greater than the radial dimension of the end of the plug portion 41 remote from the second housing 23.

In order to stably plug the plug 41 into the voice coil 121, the radial dimension of the plug 41 at the end far from the second housing 23 is equal to the thickness of the voice coil 121, and the gap between the plug 41 and the voice coil 121 is used for filling the heat transfer member 30. Of course, the radial dimension of the end of the insertion portion 41 near the second housing 23 may be larger than the thickness of the voice coil 121 to fill a larger amount of the heat transfer member 30.

Thus, referring to fig. 20, the radial dimension of the communication portion 42 in the radial direction of the voice coil 121 may be fixed. At this time, in order to effectively fix the support 40, the radial dimension of the communication portion 42 in the radial direction of the voice coil 121 may be greater than the thickness of the voice coil 121. In this way, the fixing area between the support 40 and the second housing 23 is large.

The radial dimension of the communication portion 42 may be increased stepwise or gradually from the end near the voice coil 121 to the end far from the voice coil 121 to increase the coating area of the heat transfer member 30 on the second housing 23, improving the fixing stability of the support member 40.

In some embodiments, when the second housing 23 is made of different materials, the second housing 23 may have different thicknesses. Illustratively, the thickness of the steel second housing 23 may be 1mm-2mm, and the thickness of the glass second housing 23 may be 2mm-3mm.

Then, when the thickness of the second housing 23 is small, the rigidity of the second housing 23 is small, and the second housing 23 is easily deformed.

Fig. 21 is a schematic view of the second housing in fig. 16 with a reinforcing plate. Fig. 22 is a schematic view of the reinforcement plate structure of the honeycomb sandwich panel of fig. 21. Fig. 23 is a second schematic structural view of the second housing in fig. 16 with a reinforcing plate.

Referring to fig. 21 to 23, in some embodiments, the refrigerator 1 further includes a sound board 50, the sound board 50 is attached to a side of the second housing 23 corresponding to the recess, the voice coil 121 is fixedly connected to the sound board 50, and the damping of the sound board 50 is greater than that of the second housing 23.

The sound board 50 may be fixedly coupled to the second housing 23 by a fastener such as a bolt. In some embodiments, both sides of the sound board 50 are adhered and fixed to the second housing 23 and the voice coil 121 through the heat transfer element 30, so that the fixing stability is high, and a large amount of heat exchange exists between the sound board 50 and the second housing 23.

When the thickness of the second housing 23 is small, the damping of the second housing 23 is small and the hardness is large, so that the second housing 23 is liable to generate resonance sound and sharp sound of a high frequency. By providing the sound-emitting plate 50 with larger damping, the damping and rigidity of the first vibration part and the second vibration part 231 are improved, the frequency range of the sound emitted by the second shell 23 can be enlarged, the resonance sound and the high-frequency sharp sound emitted by the second shell 23 are avoided, and the influence on the hearing caused by obvious peak-valley and distortion of the audio response of the second shell 23 is also avoided.

The thickness of the sound board 50 may be less than 3mm. Illustratively, the thickness of the sound board 50 in this embodiment may be 2mm.

Since the exciter has a magnet, the distance between the exciter and the second housing 23 becomes large after the sound board 50 is provided. In this way, when the material of the second housing 23 is a magnetic metal such as iron, the magnetic attraction force between the second housing 23 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 23 and the actuator.

Considering that the first and second vibration parts 231 may vibrate with the sound emitting plate 50 while the portion of the second housing 23 connected to the heat insulating layer 21 is stationary, the sound emitting plate 50 may be disposed at the middle positions of the first and second vibration parts 231, respectively.

In some embodiments, a relief gap is provided between the edge of the sound emitting plate 50 and the edge of the first vibration portion and between the edge of the sound emitting plate 50 and the edge of the second vibration portion 231, the relief gap being provided along the circumferential direction of the sound emitting plate 50. Illustratively, the width of the relief gap may be 5mm-15mm. Compared with the arrangement mode that the sounding board 50 is attached to the inner wall surface of the concave part, the width of the avoidance gap is larger, the part, corresponding to the avoidance gap, of the second shell 23 can form a transition area and vibrate along with the sounding board 50, and the problem that when the second shell 23 vibrates due to too small gap between the edge of the sounding board 50 and the edge of the concave part, the part, corresponding to the opening of the concave part, of the second shell 23 receives too large shearing force, and cannot obtain enough amplitude to influence the volume is avoided.

To achieve heat conduction between the voice coil 121 and the second housing 23, in some embodiments, the sound emitting board 50 includes a sound emitting board body 51 and a heat conducting portion 52 for conducting heat, the voice coil 121 is connected to the heat conducting portion 52, and the heat transfer member 30 is disposed between the second housing 23 and the heat conducting portion 52 and between the heat conducting portion 52 and the voice coil 121, respectively.

At this time, the heat conduction portion 52 constitutes a part of the sound board 50 and vibrates with the sound board 50. After the voice coil 121 is connected to the sound emitting board 50 through the heat transfer member 30, heat of the voice coil 121 can be transferred to the heat conducting portion 52 through the heat transfer member 30, and heat of the heat conducting portion 52 can be transferred to the second housing 23 through the heat transfer member 30.

The heat conducting part 52 may be made of silicone heat conducting glue, polyurethane heat conducting and electric conducting glue, heat conducting silicone grease, etc.

In some embodiments, the sound board 50 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 50 includes a core 53 and skins (not shown) attached to opposite sides of core 53; wherein the skin is a heat conducting material, and the heat conducting part 52 is arranged at a position of the core 53 corresponding to the voice coil 121.

The material and structure of the core material 53 are different depending on the type of sandwich panel. By way of example, the sound board 50 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 material 53 has a plate-like structure having a plurality of through holes, and the core material 53 may be made of aluminum, aramid, kraft paper, or the like. Referring to fig. 20, the heat conducting portion 52 may be filled at a position of the through hole opposite to the voice coil 121.

The sound board 50 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 53 has a receiving groove for receiving the heat conductive portion 52, and the heat conductive portion 52 is disposed in the receiving groove. Wherein, when the foam sandwich panel is formed, the heat conducting part 52 can be arranged between the first skin and the second skin, and when the core material 53 is formed by foaming, the heat conducting part 52 can be filled between the first skin and the second skin and is enclosed outside the heat conducting part 52. Of course, after the core material 53 is molded, the foam sandwich panel may be perforated to form a storage groove, and in this case, the heat conduction portion 52 may be filled in the storage groove.

In order to improve the heat conduction efficiency between the voice coil 121 and the heat conduction portion 52 and between the heat conduction portion 52 and the second housing 23, the skins on both sides of the core 53 are made of heat conduction materials, such as carbon fiber, aluminum foil, and the like.

In this way, the heat of the voice coil 121 can be transferred to the skin through the heat transfer member 30, the heat of the skin is transferred to the heat conduction portion 52, and then the heat of the heat conduction portion 52 can be transferred to the skin on the other side, which can be conducted to the second case 23 through the heat transfer member 30 for heat dissipation.

To achieve heat conduction between the voice coil 121 and the second housing 23, referring to fig. 23, in some embodiments, the sound board 50 includes a avoiding portion, where the avoiding portion is connected to two sides of the sound board 50, and the voice coil 121 may pass through the avoiding portion and be fixedly connected to the second housing 23. At this time, the voice coil 121 is directly connected to the second housing 23 through the heat transfer member 30, and the transfer path is small and the heat transfer efficiency is high.

A second aspect of the embodiments of the present invention provides a sound generating apparatus, including a plurality of sound generating elements, where a loudness difference of sound waves generated by the plurality of sound generating elements at each octave is 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 14, the setting of the woofer, 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 mobile phone, an earphone or a sound box, the sound emitting piece 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. 11) of the exciter.

Of course, the present embodiment is not limited by improving the control signal control method of the exciter and simultaneously providing the woofer 14 or providing the exciter capable of emitting a bass sound.

In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A refrigerator, comprising:

an actuator assembly including a first actuator and a second actuator;

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 concave part, the first exciter and the second exciter are positioned in the concave part, the second shell covers the opening of the concave part, and the second shell is provided with a first vibration part and 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;

wherein the first and second actuators comprise vibratable voice coils; the voice coil is connected with the second shell;

The sound board is attached to one side of the second shell corresponding to the concave part, the voice coil is fixedly connected with the sound board, and the damping of the sound board is larger than that of the second shell.

2. The refrigerator of claim 1, wherein there is a relief gap between an edge of the sound emitting plate and an edge of the first vibration portion and between an edge of the sound emitting plate and an edge of the second vibration portion.

3. The refrigerator of claim 2, wherein the escape gap is provided along a circumferential direction of the sound-emitting panel.

4. The refrigerator of claim 3, wherein the relief gap has a width of 5mm to 15mm.

5. The refrigerator of any one of claims 1-4, wherein the first and second exciters further comprise a heat transfer member through which the voice coil is connected to the second housing.

6. The refrigerator of claim 5, wherein the sound generating plate includes a sound generating plate body and a heat conducting portion for conducting heat, the voice coil is connected to the heat conducting portion, and the heat transfer member is disposed between the second housing and the heat conducting portion and between the heat conducting portion and the voice coil, respectively.

7. The refrigerator of claim 6, wherein the sound board comprises a core material and a skin, the skin being attached to opposite sides of the core material; the skin is a heat conduction material piece, and the heat conduction part is arranged at the position of the core material corresponding to the voice coil.

8. The refrigerator of claim 7, 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 second shell.

9. The refrigerator according to any one of claims 1 to 4, wherein the refrigerator includes a bracket and a control board, both of which are located in the recess, the bracket being fixed to the first vibration portion, 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.

10. The refrigerator of claim 9, wherein an area of the second vibration part is 0.7 to 0.85 times an area of the first vibration part.