refrigerator

Abstract

The present invention provides a refrigerator comprising an exciter assembly including a first exciter and a second exciter; a housing including an insulation layer, a first shell, and a second shell; the insulation layer being provided with a first recess and a second recess spaced apart from each other; the first exciter being located within the first recess, and the second exciter being located within the second recess; a portion of the second shell corresponding to the first recess constituting a first vibrating portion, and a portion of the second shell corresponding to the second recess constituting a second vibrating portion; the first exciter being connected to the first vibrating portion, and the second exciter being connected to the second vibrating portion; and the difference in loudness per octave between the sound waves emitted by the first vibrating portion and the sound waves emitted by the second vibrating portion being less than 3dB. The refrigerator provided by the present invention can reduce a user's sensitivity to sound sources.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-generating equipment, and in particular to a refrigerator. Background Art

[0002] Refrigerators are commonly used household appliances in people's lives, used to keep food or other items at a constant low temperature.

[0003] The refrigerator includes an insulation layer and a first shell and a second shell disposed on either side of the insulation layer. The insulation layer is used to maintain the internal temperature of the refrigerator within a preset range. The first shell is attached to the inner wall of the insulation layer to enclose a storage area for food and other items. The second shell is attached to the outside of the insulation layer to protect the refrigerator. To enable the refrigerator to generate sound, the refrigerator also includes an exciter. A recessed portion within the insulation layer houses the exciter, which drives the second shell to vibrate and generate sound. Furthermore, the second shell is relatively intact, preventing foreign matter such as dust and water from accumulating on the exciter.

[0004] To enhance the user's auditory experience, a refrigerator can be equipped with multiple exciters spaced apart. However, users are more sensitive to the sound and image of sounds produced by multiple exciters, causing them to perceive the sound source as being biased towards one exciter. For example, when a user is located at different points in the refrigerator, they may perceive the sound source as being located at different locations. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present invention provides a refrigerator that can reduce a user's sensitivity to sound sources.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A first aspect of an embodiment of the present invention provides a refrigerator, which includes an exciter assembly, the exciter assembly includes a first exciter and a second exciter; a box body, and a storage area is provided in the box body; the box body includes an insulation layer, a first shell and a second shell, and the first shell and the second shell are respectively attached to the inner and outer sides of the insulation layer.

[0008] Among them, by providing a heat-insulating layer, the refrigerator can have a better heat-insulating effect, and the second shell can form a better protective effect for the refrigerator.

[0009] In some embodiments, the insulation layer is provided with a first recess and a second recess, the first recess and the second recess being spaced apart. A first exciter is located within the first recess, and a second exciter is located within the second recess. A second housing covers the openings of the first and second recesses, respectively. The portion of the second housing corresponding to the first recess constitutes a first vibrating portion, and the portion of the second housing corresponding to the second recess constitutes a second vibrating portion. The first exciter is connected to the first vibrating portion and is configured to drive the first vibrating portion to vibrate and produce sound. The second exciter is connected to the second vibrating portion and is configured to drive the second vibrating portion to vibrate and produce sound. The first exciter and the second exciter both drive the second housing to vibrate and produce sound. This means that the refrigerator produces sound through surface vibration. This not only maintains the integrity of the second housing, but also improves the sealing performance of the refrigerator. Furthermore, the user is less sensitive to the source of the surface vibration sound. Even if the user is located at different positions in the refrigerator, they will not perceive a change in the location of the sound source, thereby optimizing the user experience. Furthermore, the refrigerator simultaneously drives the second housing to vibrate and produce sound through multiple exciters, resulting in a higher sound pressure level.

[0010] In some embodiments, the loudness difference between the sound waves emitted by the first vibration part and the sound waves emitted by the second vibration part at each octave is less than 3 dB.

[0011] In this way, the frequency response curve of the sound emitted by the first exciter and the frequency response curve of the sound emitted by the second exciter are approximately in an overlapping state, and the user cannot perceive the loudness difference between the sound waves excited by the first exciter and the sound waves excited by the second exciter, thereby avoiding the phenomenon that the user perceives that the sound source is biased towards one of the exciters, thereby reducing the user's sensitivity to the sound source.

[0012] In some embodiments, the refrigerator includes a bracket and a control panel, both of which are located within a first recessed portion. The bracket is secured to the first vibrating portion, the control panel is secured to the bracket, and the first and second exciters are electrically connected to the control panel. Specifically, components such as the control panel and display can be centrally located within either the first or second recessed portion for ease of assembly.

[0013] In some embodiments, the first recessed portion has a first projected area on the second housing, i.e., the area of ​​the first vibrating portion, and the second recessed portion has a second projected area on the second housing, i.e., the area of ​​the second vibrating portion. The second projected area is smaller than the first projected area, i.e., the area of ​​the second vibrating portion is smaller than the area of ​​the first vibrating portion. Because the first vibrating portion is affected by the bracket, the vibration amplitude of the first vibrating portion is reduced. Therefore, by reducing the size of the second recessed portion, the first vibrating portion and the second vibrating portion can push approximately the same amount of air, thereby avoiding the difference in bass between the first and second vibrating portions, which may cause the user to perceive the location of the sound source of the refrigerator.

[0014] In some embodiments, the area of ​​the second vibration part is 0.7 times to 0.85 times the area of ​​the first vibration part.

[0015] In some embodiments, the second recessed portion has the same depth at different positions, and the second recessed portion is easy to form.

[0016] In some embodiments, the second recessed portion has a first recessed depth at a location corresponding to the second exciter, and the second recessed portion has a second recessed depth at other locations, wherein the first recessed depth is greater than the second recessed depth. Thus, the insulation layer has a greater thickness at other locations, thereby improving the insulation effect of the refrigerator.

[0017] In some embodiments, the insulation layer includes at least one heat dissipation channel, one end of which communicates with the inner wall of the second recess, and the other end of which communicates with the top or bottom wall of the insulation layer. The second housing is provided with heat dissipation holes, which are arranged opposite the heat dissipation channel. This allows airflow between the second recess and the outside air through the breathable protective member. This not only optimizes heat dissipation and prevents overheating of the second exciter, but also reduces air resistance during vibration of the second housing, resulting in a larger vibration amplitude and a higher sound pressure level for the refrigerator. Furthermore, the breathable protective member can isolate foreign matter such as water and dust from the heat dissipation channel, providing improved protection.

[0018] In some embodiments, the refrigerator is further provided with a first air-permeable protective member, which is used to prevent foreign matter from entering the heat dissipation channel. The first air-permeable protective member can effectively protect the second recessed portion to prevent foreign matter such as dust from entering the heat dissipation channel and the second recessed portion.

[0019] In some embodiments, the projection shape of the second recessed portion on the second shell is rectangular, circular, or elliptical, and can be designed according to needs as long as the projection area requirement of the second recessed portion is met.

[0020] In some embodiments, the second exciter is spaced apart from the center of the second recess in a direction parallel to the second housing. This can stimulate the second housing to generate a plurality of resonant modes, resulting in a wider resonant frequency range for the sound emitted by the second housing, and achieving a higher sound pressure level over a wider frequency range. This also prevents the sound emitted by the second housing from generating regular standing waves, reducing sound distortion.

[0021] In some embodiments, the controller includes a first high-pass filter, the input of which is electrically connected to the controller and configured to filter out sound signals below a preset frequency; a first low-pass filter, the input of which is electrically connected to the controller and configured to filter out sound signals above a preset frequency; a second high-pass filter, the input of which is electrically connected to the controller and configured to filter out sound signals below a preset frequency; a second low-pass filter, the input of which is electrically connected to the controller and configured to filter out sound signals above a preset frequency; and a first summing module, the outputs of the first and second low-pass filters being electrically connected to the input of the first summing module. In other words, the first summing module can be used to mix the two low-frequency signals below the preset frequency from the first exciter and the second exciter, thereby preventing the sound emitted by the refrigerator from fluctuating.

[0022] In some embodiments, the first delay module, the input end of the first delay module is electrically connected to the output end of the first summing module; the second summing module, the output end of the first high-pass filter and the output end of the first delay module are both electrically connected to the input end of the second summing module, and the output end of the second summing module is electrically connected to the first exciter; the third summing module, the output end of the second high-pass filter and the output end of the first delay module are both electrically connected to the input end of the third summing module, and the output end of the third summing module is electrically connected to the second exciter.

[0023] That is, by delaying the low-frequency signal below the preset frequency, it is difficult for the user to perceive the location of the sound source of the low-frequency signal. The frequency response curves of the first exciter and the second exciter on the refrigerator approximately overlap in the range above the preset frequency. In this way, it is difficult for the user to perceive the location of the refrigerator sound source, thereby reducing the user's perception sensitivity to the location of the refrigerator sound source.

[0024] In some embodiments, the refrigerator includes a storage portion and a door, wherein the storage area is formed in the storage portion, and the first and second exciters are disposed on the door. The refrigerator further includes a third exciter disposed on the storage portion, configured to cause the second housing in the storage portion to vibrate and generate sound. Specifically, given the relatively small size of the refrigerator door, the third exciter can be disposed on the outer wall of the refrigerator to emit low-frequency sound, while the first and second exciters on the door emit high-frequency sound.

[0025] In some embodiments, the refrigerator also includes a controller; a third high-pass filter, the input end of the third high-pass filter is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the third high-pass filter is electrically connected to the first exciter; a third low-pass filter, the input end of the third low-pass filter is electrically connected to the controller, for filtering out sound wave signals above a preset frequency; a fourth high-pass filter, the input end of the fourth high-pass filter is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the fourth high-pass filter is electrically connected to the second exciter; a fourth low-pass filter, the input end of the fourth low-pass filter is electrically connected to the controller, for filtering out sound wave signals above a preset frequency; a fourth summing module, the output end of the third low-pass filter and the output end of the fourth low-pass filter are both electrically connected to the input end of the fourth summing module, and the output end of the fourth summing module is electrically connected to the third exciter.

[0026] In some embodiments, the refrigerator also includes a woofer, which is used to emit low-frequency sounds; a third recessed portion for accommodating the woofer is provided on the insulation layer, and a sound hole is provided at a position of the second shell corresponding to the third recessed portion, and the sound hole connects the inner and outer sides of the second shell; the refrigerator also includes: a second breathable protective member, which is arranged at the sound hole to prevent foreign matter from entering the third recessed portion.

[0027] In some embodiments, a controller; a fifth high-pass filter, the input end of the fifth high-pass filter is electrically connected to the controller for filtering out sound wave signals below a preset frequency, and the output end of the fifth high-pass filter is electrically connected to the first exciter; a fifth low-pass filter, the input end of the fifth low-pass filter is electrically connected to the controller for filtering out sound wave signals above a preset frequency; a sixth high-pass filter, the input end of the sixth high-pass filter is electrically connected to the controller for filtering out sound wave signals below a preset frequency, and the output end of the sixth high-pass filter is electrically connected to the second exciter; a sixth low-pass filter, the input end of the sixth low-pass filter is electrically connected to the controller for filtering out sound wave signals above a preset frequency; a fifth summing module, the output end of the fifth low-pass filter and the output end of the sixth low-pass filter are both electrically connected to the input end of the fifth summing module, and the output end of the fifth summing module is electrically connected to the woofer.

[0028] In some embodiments, the first exciter and the second exciter have the same structure, both including a vibrating voice coil; a heat transfer element, the voice coil is connected to the second shell through the heat transfer element, 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 conducted to the second shell through the heat transfer element.

[0029] No sound holes are required on the second housing, and the first and second exciters are not exposed to the air. This ensures the integrity of the second housing and provides excellent dust and water resistance. Furthermore, the plane-generated sound has a flatter frequency response than a speaker.

[0030] The voice coil is connected to the second shell through a heat transfer member. The heat generated when the voice coil vibrates can be conducted to the second shell through the heat transfer member. At this time, heat exchange can occur between the second shell and the air to cool the second shell, thereby achieving heat dissipation and cooling of the voice coil, avoiding overheating of the voice coil and causing the vibration amplitude of the voice coil to become smaller.

[0031] In some embodiments, the voice coil is made of a heat-conducting material to increase the heat exchange between the voice coil and the heat transfer element, thereby improving the heat dissipation effect of the voice coil.

[0032] In some embodiments, the heat transfer element is a viscous heat-conducting adhesive, which facilitates assembly between the voice coil and the second housing and has high fixing stability.

[0033] In some embodiments, the refrigerator also includes a support member, which has: a plug-in part, the voice coil is plugged into the plug-in part; a connecting part, the connecting part is connected to the plug-in part, and the connecting part passes through the side of the support member facing the second shell, and the heat transfer member is filled in the plug-in part and the connecting part.

[0034] In this way, the support member and the second housing, as well as the second housing and the voice coil, can be bonded and fixed together using the heat transfer member. Compared to a direct connection between the voice coil and the second housing, the contact area between the support member and the second housing is larger, resulting in greater support stability. Furthermore, heat generated by the voice coil can be transferred to the second housing via the heat transfer member, improving heat dissipation.

[0035] In some embodiments, the radial dimension of the connecting portion at one end close to the second shell is larger than the radial dimension of the plug portion at one end away from the second shell. In this way, the bonding area between the support member and the second shell is larger, and the fixing stability between the support member and the second shell is higher.

[0036] In some embodiments, the refrigerator further includes a sounding plate attached to a side of the second housing corresponding to the recessed portion. The voice coil is fixedly connected to the sounding plate, and the damping of the sounding plate is greater than that of the second housing. This improves the rigidity of the second housing and expands the frequency range of sound emitted by the second housing, thereby avoiding high-frequency shrill sounds and preventing excessive fluctuations in the frequency response of the second housing that could cause sound distortion.

[0037] In some embodiments, the soundboard includes a soundboard body and a heat-conducting portion for conducting heat. The voice coil is connected to the heat-conducting portion, and heat transfer elements are disposed between the second housing and the heat-conducting portion, and between the heat-conducting portion and the voice coil. This allows the voice coil to dissipate heat through the soundboard while optimizing the sound emitted by the second housing.

[0038] In some embodiments, the sound board is a sandwich panel, comprising a core material and a skin, wherein the skin is attached to opposite sides of the core material; wherein the skin is a heat-conducting material, and the heat-conducting portion is arranged at a position of the core material corresponding to the voice coil.

[0039] Sandwich panels are relatively low-cost and readily available, increasing both the rigidity of the secondary shell and the quality of the sound it produces. Furthermore, the core material, located opposite the voice coil and surrounding skin on both sides, is constructed from thermally conductive materials. This allows heat from the voice coil to be transferred to the soundboard, helping to dissipate heat and reduce the temperature of the voice coil.

[0040] In some embodiments, the sound plate includes a relief portion that connects two sides of the sound plate, and the voice coil can pass through the relief portion and be fixedly connected to the second housing. In this way, the voice coil can directly exchange heat with the second housing, achieving a better heat dissipation effect.

[0041] A second aspect of an embodiment of the present invention provides a sound-generating device comprising a plurality of sound-generating elements, wherein the loudness difference of the sound waves emitted by the plurality of sound-generating elements at each octave is less than 3dB. Depending on the type of sound-generating device, the sound waves of the sound-generating device can be controlled in different ways. For example, the size of the recessed portion housing the exciter can be improved, the control method for the exciter's control signal can be improved, an exciter capable of producing bass sound can be provided, and a subwoofer capable of producing bass sound can be provided.

[0042] In some embodiments, the sound-emitting device is any one of a television, a mobile phone, headphones, and a speaker. That is, through the above method, different sound-emitting devices with multiple sound-emitting parts can be adjusted to reduce the user's sensitivity to the sound source of the sound-emitting device, optimize the user experience, and have a wide range of applications.

[0043] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the refrigerator and sound-emitting device provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 Schematic diagram of the structure of a refrigerator in the related art;

[0046] Figure 2 for Figure 1 Frequency response curves of the sound produced by the first exciter and the sound produced by the second exciter;

[0047] Figure 3 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 1 ;

[0048] Figure 4 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 2 ;

[0049] Figure 5 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 3 ;

[0050] Figure 6 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 4 ;

[0051] Figure 7 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 5 ;

[0052] Figure 8 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 6 ;

[0053] Figure 9 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 7 ;

[0054] Figure 10 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 8 ;

[0055] Figure 11 A system architecture diagram of a refrigerator provided by an embodiment of the present invention;

[0056] Figure 12 Schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 1 ;

[0057] Figure 13 for Figure 12 System architecture diagram of the refrigerator;

[0058] Figure 14 Schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 2 ;

[0059] Figure 15 for Figure 14 System architecture diagram of the refrigerator;

[0060] Figure 16 A schematic structural diagram of a refrigerator provided by an embodiment of the present invention in which the first exciter and the second exciter include voice coils;

[0061] Figure 17 for Figure 16 Schematic diagram of the structure of the middle exciter;

[0062] Figure 18 for Figure 17 Schematic diagram of the structure of the middle support Figure 1 ;

[0063] Figure 19 for Figure 17 Schematic diagram of the structure of the middle support Figure 2 ;

[0064] Figure 20 for Figure 18 and Figure 19 a cross-sectional view of the middle support member;

[0065] Figure 21 for Figure 16 Structural diagram when a reinforcement plate is provided on the second shell Figure 1 ;

[0066] Figure 22 for Figure 21 Schematic diagram of the reinforcement plate structure when a honeycomb sandwich panel is provided;

[0067] Figure 23 for Figure 16 Structural diagram when a reinforcement plate is provided on the second shell Figure 2 .

[0068] Reference numerals:

[0069] 1: Refrigerator;

[0070] 11: First exciter; 12: Second exciter; 121: Voice coil; 122: Shuffler; 13: Third exciter; 14: Woofer;

[0071] 20: Box body; 21: Insulation layer; 211: Second recessed portion; 212: Heat dissipation channel; 22: First housing; 23: Second housing; 231: Second vibrating portion; 24: First switch door; 25: Second switch door; 26: Display screen; 27: Control panel;

[0072] 30: heat transfer parts;

[0073] 40: support member; 41: plug-in portion; 42: connecting portion;

[0074] 50: Sounding board; 51: Sounding board body; 52: Heat conducting part; 53: Core material;

[0075] 61: first high-pass filter; 62: first low-pass filter; 63: second high-pass filter; 64: second low-pass filter; 65: first summing module; 66: first delay module; 67: second summing module; 68: third summing module; 691: first amplifier; 692: second amplifier;

[0076] 71: third high-pass filter; 72: third low-pass filter; 73: fourth high-pass filter; 74: fourth low-pass filter; 75: fourth summing module; 761: third amplifier; 762: fourth amplifier; 763: fifth amplifier;

[0077] 81: fifth high-pass filter; 82: fifth low-pass filter; 83: sixth high-pass filter; 84: sixth low-pass filter; 85: fifth summing module; 861: sixth amplifier; 862: seventh amplifier; 863: eighth amplifier. DETAILED DESCRIPTION

[0078] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0079] In the related art, refrigerators have the need to make sounds or interact with users through voice. For example, a user can use the refrigerator to look up a recipe while cooking or play a TV series. In this case, the refrigerator can receive the user's voice commands and play the information the user wants to query through voice.

[0080] Figure 1 It is a structural diagram of a refrigerator in the related art. Figure 2 for Figure 1The frequency response curves of the sound produced by the first actuator and the sound produced by the second actuator. Figure 1 and Figure 2 In order to enhance the user experience, the refrigerator may be provided with multiple sound-generating components. For example, the refrigerator may be provided with two exciters, which are spaced apart to form a stereo sound system. For example, the refrigerator may include two switch doors, with an exciter correspondingly provided on each switch door. When the two exciters vibrate, due to the difference in the components at the installation positions of the two exciters, the amount of air that can be pushed by the first exciter and the second exciter will be different. In this way, the loudness of the sound excited by the first exciter and the second exciter in the low-frequency band will be greatly different. For example, please refer to Figure 2 The frequency response curves of the two actuators overlap above 400Hz, but differ significantly below 400Hz. As a result, the user perceives the sound source as being biased toward the actuator with louder frequencies below 400Hz. This shifts the perceived center of the sound source depending on the user's position within the refrigerator, resulting in a poor user experience.

[0081] In view of this, an embodiment of the present application provides a refrigerator comprising a first exciter and a second exciter. The loudness difference in each octave of the sound generated by the first exciter and the second exciter is within a range imperceptible to the human body. Thus, the frequency response curves of the sounds generated by the first exciter and the second exciter approximately overlap, and the user will not perceive the difference in sound volume between the first exciter and the second exciter, nor will they perceive the locations of the sound sources of the first exciter and the second exciter. This reduces the user's sensitivity to the location of the sound source, thereby optimizing the user experience.

[0082] Figure 3 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 1 . Figure 4 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 2 .

[0083] See also Figure 3 and Figure 4 This embodiment provides a refrigerator 1, which includes a box body 20, and a storage area is provided in the box body 20; the box body 20 includes an insulation layer 21, a first shell 22 and a second shell 23, and the first shell 22 and the second shell 23 are respectively attached to the inner and outer sides of the insulation layer 21.

[0084] Specifically, the refrigerator 1 is a refrigeration device for storing items, and is used to provide a constant low-temperature environment for the items stored therein.

[0085] Depending on usage requirements, refrigerator 1 can have a freezer compartment, a refrigerator compartment, a temperature control compartment, etc. Refrigerator 1 includes a housing 20, which includes a storage portion and a switchable door. The freezer compartment, refrigerator compartment, and temperature control compartment are formed in the storage portion. The switchable door is connected to the storage portion and serves to cover the freezer compartment, refrigerator compartment, and temperature control compartment. Of course, refrigerator 1 can also have three doors, each covering the freezer compartment, refrigerator compartment, and temperature control compartment.

[0086] Figure 12 Schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 1 14 is a schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 2 See Figure 12 and Figure 14 In some embodiments, the present embodiment is described by taking the refrigerator 1 as comprising four doors as an example, wherein two doors are used to cover the refrigeration compartment, and the other two doors are used to cover the freezing compartment.

[0087] Refrigerator 1 includes an insulation layer 21. This insulation layer 21 has good thermal insulation properties and prevents heat exchange between the interior and exterior of refrigerator 1, thereby maintaining the freezer compartment, refrigerator compartment, and temperature control compartment within refrigerator 1 within a preset temperature range. The insulation layer 21 can be made of polyurethane and formed using a foaming process.

[0088] A first shell 22 is provided inside the heat-insulating layer 21. The first shell 22 is respectively provided on the storage portion and the switch door. The first shell 22 can be made of plastic, etc., which is easy to clean and resistant to acid and alkali corrosion.

[0089] The second housing 23 is disposed on the storage portion and the switch door, respectively. The second housing 23 can be made of glass, plastic, steel, or the like. Specifically, the second housing 23 on the storage portion can be made of glass, plastic, or the like. The second housing 23 on the switch door can also be made of glass, plastic, or the like. The materials of the second housings 23 on the storage portion and the switch door can be the same or different.

[0090] In some embodiments, the refrigerator 1 further includes an exciter assembly, which includes a first exciter 11 and a second exciter 12. In this way, the first exciter 11 and the second exciter 12 can form a stereo system to optimize the user experience.

[0091] The first actuator 11 and the second actuator 12 can be set at the storage part or at the switch door at the same time. Figure 12 and Figure 14 The two opening and closing doors corresponding to the refrigeration compartment include a first opening and closing door 24 and a second opening and closing door 25. The first exciter 11 and the second exciter 12 can be respectively arranged on the first opening and closing door 24 and the second opening and closing door 25.

[0092] In some embodiments, the first actuator 11 and the second actuator 12 may be any one of a magnetostrictive actuator, an electromagnetic actuator, and a piezoelectric actuator. That is, the first actuator 11 and the second actuator 12 may be of the same or different types.

[0093] In some embodiments, a first recessed portion and a second recessed portion 211 are provided on the insulation layer 21, and the first recessed portion and the second recessed portion 211 are spaced apart from each other. The first exciter 11 is located in the first recessed portion, and the second exciter 12 is located in the second recessed portion 211; the second shell 23 covers the opening of the first recessed portion and the opening of the second recessed portion 211 respectively.

[0094] In this way, the first recessed portion and the second recessed portion 211 are respectively sealed by the second shell 23 and form a closed cavity to prevent external dust, water and other foreign matter from being deposited on the first exciter 11 and the second exciter 12, and the service life of the first exciter 11 and the second exciter 12 is longer.

[0095] In some embodiments, please refer to Figure 3 and Figure 4 The part of the second shell 23 corresponding to the first recessed portion constitutes a first vibration portion (not shown), and the part of the second shell 23 corresponding to the second recessed portion 211 constitutes a second vibration portion 231; the first exciter 11 is connected to the first vibration portion, and is used to drive the first vibration portion to vibrate and make sound, and the second exciter 12 is connected to the second vibration portion 231, and is used to drive the second vibration portion 231 to vibrate and make sound.

[0096] The first recessed portion and the second recessed portion 211 are spaced apart from each other, so that the first vibrating portion and the second vibrating portion 231 are two unconnected parts of the second housing 23. The first exciter 11 is connected to the first vibrating portion to drive the first vibrating portion to vibrate and produce sound, and the second exciter 12 is vibratingly connected to the second vibrating portion 231 to drive the second vibrating portion 231 to vibrate and produce sound. That is, the refrigerator 1 produces sound through surface vibration, and the user is relatively insensitive to the sound source of the surface vibration sound. Even if the user is at a different position in the refrigerator 1, the user will not perceive a change in the location of the sound source, thereby optimizing the user experience.

[0097] In some embodiments, the first vibrating portion and the second vibrating portion 231 can constitute two independent sound sources, and the loudness difference between the sound waves emitted by the first vibrating portion and the sound waves emitted by the second vibrating portion 231 at each octave is within a preset threshold range, namely, a 3dB loudness difference range that is imperceptible to the human body. An octave refers to the interval between two frequencies on a filter characteristic curve whose frequency ratio is 2 or 1 / 2.

[0098] It is understandable that due to factors such as assembly tolerance of the device, at a certain frequency position, the loudness difference between the sound wave emitted by the first vibration part and the sound wave emitted by the second vibration part 231 may be greater than 3dB, which is negligible.

[0099] In this way, the frequency response curve of the sound emitted by the first vibration part and the frequency response curve of the sound emitted by the second vibration part 231 are approximately in an overlapping state, avoiding the problem that the frequency response of one exciter is greater than the frequency response of the other exciter within a certain frequency band, for example, the frequency band below 400 Hz, causing the user to perceive the sound to be sometimes louder and sometimes softer, and the sound source position to be sometimes near and sometimes far away.

[0100] In some embodiments, see Figure 1 The refrigerator 1 includes a control board 27 , and the first exciter 11 and the second exciter 12 are electrically connected to the control board 27 respectively, so that the start and stop of the first exciter 11 and the second exciter 12 can be controlled by the control board 27 .

[0101] 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 to a control board 27. For ease of assembly, the control board 27, the display screen 26, etc. are usually centrally located at the location of one of the actuators.

[0102] In some embodiments, the refrigerator 1 includes a bracket (not shown), the bracket and the control panel 27 are both located in the first recessed portion, the bracket is fixed on the first vibrating portion, and the control panel and the display screen are fixed on the bracket.

[0103] The bracket can be a frame structure or a plate. The bracket can be made of plastic, steel, or the like. In some embodiments, the bracket can be fixedly connected to the second housing 23 by bonding, screwing, or the like. For example, the bracket can be fixed to the second housing 23 by double-sided tape or foam.

[0104] Understandable, see Figure 1 The second recessed portion 211 is only used to accommodate the second exciter 12, while the first recessed portion houses the first exciter 11, bracket, display screen, etc. This makes the projected area of ​​the first recessed portion on the second housing 23 larger than the projected area of ​​the second recessed portion 211 on the second housing 23. In other words, the area of ​​the first vibrating portion is larger than that of the second vibrating portion 231, allowing the first vibrating portion to have a larger vibration amplitude than the second vibrating portion 231.

[0105] In some embodiments, in order to facilitate the maintenance and replacement of components such as the display screen and the control panel, the portion of the second housing 23 connected to the first exciter 11 is generally detachable. Figure 1When the first switch door 24 is on the second housing 23 corresponding to the first switch door 24, the second housing 23 is detachable, and the second housing 23 can be frame-fixed on the first housing 22. In other words, there is an air gap between the second housing 23 on the first switch door 24 and the insulation layer 21 on the first switch door 24.

[0106] On the one hand, the first exciter 11 can cause the second housing 23 of the door to vibrate, resulting in a vibration area much larger than that of the second vibrating portion 231. This allows the first exciter 11 to displace a larger volume of air than the second exciter 12. On the other hand, the air gap between the insulation layer 21 and the second housing 23 is connected to the first recess, effectively increasing the equivalent volume of the first recess. The first recess has a larger volume than the second recess 211, and the air resistance experienced by the first vibrating portion during vibration is smaller than that experienced by the second vibrating portion 231 during vibration.

[0107] It is understandable that the effect of low-frequency sound is positively correlated with the amount of air that the exciter can push.

[0108] In some embodiments, the first vibrating portion has a larger area and a larger vibration amplitude than the second vibrating portion 231. The first vibrating portion can push a larger volume of air than the second vibrating portion 231, and can emit better low-frequency sound than the second vibrating portion 231. For example, see Figure 2 In the low-frequency range below 400 Hz, the loudness of the first vibrating part of the first switch door 24 is greater than the loudness of the second vibrating part 231 of the second switch door 25. In the high-frequency range above 400 Hz, the frequency response curve of the first vibrating part and the frequency response curve of the second vibrating part 231 are approximately the same.

[0109] This will easily cause the sound source perceived by the user to be biased towards the first exciter 11, and the sound heard by the user will fluctuate. When the user is at different positions in the refrigerator 1, the user will perceive the sound source as sometimes near and sometimes far away.

[0110] In some embodiments, the low-frequency sound of the second vibrating part 231 can be improved by increasing the amount of air pushed by the second vibrating part 231. For example, when the first vibrating part and the second vibrating part 231 can push approximately the same amount of air, the first vibrating part and the second vibrating part 231 can emit approximately the same low-frequency sound.

[0111] It can be understood that the vibration amplitude of the first vibration part after the bracket, display screen and other components are provided is smaller than the vibration amplitude of the first vibration part without the bracket, display screen and other components.

[0112] In some embodiments, the first recessed portion has a first projection area on the second shell 23, that is, the area of ​​the first vibration portion, and the second recessed portion 211 has a second projection area on the second shell 23, that is, the area of ​​the second vibration portion 231. The second projection area is smaller than the first projection area, that is, the area of ​​the second vibration portion 231 is smaller than the area of ​​the first vibration portion.

[0113] The vibration amplitude of the second vibration part 231 is greater than that of the first vibration part. The first vibration part and the second vibration part 231 can push approximately the same volume of air, and the first vibration part and the second vibration part 231 can emit approximately the same low-frequency sound.

[0114] In some embodiments, the area of ​​the second vibration part is 0.7 to 0.85 times the area of ​​the first vibration part. The relationship between the first projected area and the second projected area is related to factors such as the size of the bracket, the weight of the bracket, and the weight of the display screen, and is not limited in this embodiment.

[0115] In some embodiments, see Figure 3 The second recessed portion 211 has the same recessed depth at different positions, that is, the second recessed portion 211 is a groove-shaped structure with equal depth. The second recessed portion 211 is easy to form and has a low manufacturing cost.

[0116] In some embodiments, see Figure 4 The second recessed portion 211 has a first recessed depth at a position corresponding to the second exciter 12 , and has a second recessed depth at other positions of the second recessed portion 211 , and the first recessed depth is greater than the second recessed depth.

[0117] Thus, the second recess 211 is stepped, with the second recess 211 having a greater depth at the location corresponding to the second exciter 12 and a smaller depth elsewhere. The insulating layer 21 is thinner at the location corresponding to the second exciter 12, while the portion corresponding to the other locations of the second recess 211 is thicker, resulting in a better insulation effect.

[0118] Figure 5 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 3 . Figure 6 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 4 .

[0119] In some embodiments, see Figure 5 and Figure 6At least one heat dissipation channel 212 is provided in the thermal insulation layer 21, one end of the heat dissipation channel 212 is connected to the inner wall surface of the second recessed portion 211, and the other end of the heat dissipation channel 212 is connected to the top wall surface or the bottom wall surface of the thermal insulation layer 21; the second shell 23 is provided with heat dissipation holes, and the heat dissipation holes are arranged opposite to the heat dissipation channel 212.

[0120] One end of the heat dissipation channel 212 communicates with the second recessed portion 211, and the other end extends through the outer wall of the thermal insulation layer 21. Furthermore, the second housing 23 is provided with heat dissipation holes (not shown), which are arranged opposite the heat dissipation channel 212. This allows the second recessed portion 211 to communicate with the outside air through the heat dissipation channel 212, allowing heat generated by the second exciter 12 to be conducted to the outside air through the heat dissipation channel 212. This improves the heat dissipation effect of the second exciter 12 and prevents the vibration amplitude of the second vibrating portion 231 from being reduced due to overheating of the second exciter 12.

[0121] At the same time, during the vibration of the second shell 23, the air in the second recessed portion 211 can circulate with the external air through the heat dissipation channel 212. The air resistance encountered by the second shell 23 is small, the vibration amplitude of the second shell 23 is large, and the sound emitted by the second vibration portion 231 has a large sound pressure level.

[0122] In some embodiments, there may be multiple heat dissipation channels 212 . In this way, the connection area between the second recessed portion 211 and the external air is larger, which helps more heat to be dissipated through the heat dissipation channels 212 and achieves better heat dissipation effect.

[0123] The heat dissipation holes can be provided at any position of the second housing 23, for example, on the front side wall of the refrigerator 1. In some embodiments, the heat dissipation holes can be provided on the top wall or the bottom wall of the second housing 23, that is, the heat dissipation holes can be hidden at the bottom or top of the refrigerator 1. When the user is using the refrigerator 1, the heat dissipation holes are difficult to be seen from the external perspective, and the appearance of the refrigerator 1 is relatively complete.

[0124] And when the heat dissipation holes are arranged at the top or bottom of the refrigerator 1, the heat dissipation channel 212 can extend in a vertical direction or in an inclined direction, so as to utilize the chimney effect to realize convection between the hot air in the second recess 211 and the cold air outside the refrigerator 1, thereby improving the heat dissipation rate of the second exciter 12.

[0125] It can be understood that when the second recessed portion 211 is connected to the outside air through the heat dissipation channel 212, the second exciter 12 is also exposed to the air through the heat dissipation channel 212. In some embodiments, the refrigerator 1 is also provided with a first breathable protective member (not shown), which is used to prevent foreign matter from entering the heat dissipation channel 212.

[0126] The first breathable protective member has good ventilation performance and does not affect the mutual circulation between the hot air in the second recessed portion 211 and the cold air outside the refrigerator 1. At the same time, the first breathable protective member can also prevent foreign matter such as water, dust, and dander from entering the second recessed portion 211 through the heat dissipation channel 212. In other words, the provision of the first breathable protective member can provide better protection for the second exciter 12.

[0127] In some embodiments, the first breathable protective component includes a polytetrafluoroethylene layer and a textile layer, and the polytetrafluoroethylene layer and the textile layer are bonded to each other. The polytetrafluoroethylene layer and the textile layer have good air permeability. The textile layer can protect the polytetrafluoroethylene layer to prevent foreign matter from clogging the polytetrafluoroethylene layer.

[0128] In some embodiments, the first breathable protective member is detachably connected to the refrigerator 1 so that the first breathable protective member can be cleaned or replaced regularly.

[0129] Figure 7 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 5 . Figure 8 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 6 . Figure 9 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 7 .

[0130] In some embodiments, see Figures 7 to 9 The projection shape of the second recessed portion 211 on the second shell 23 can be a regular geometric shape, such as a rectangle, a circle or an ellipse, which is easy to shape and has a low production cost. Its shape can be designed according to needs as long as it can meet the projection area requirements of the second recessed portion 211.

[0131] The projection shape of the second recessed portion 211 on the second housing 23 may also be an irregular geometric shape. For example, Figure 10 Schematic diagram of the structure of the second recessed portion in the refrigerator provided by an embodiment of the present invention Figure 8 , see Figure 10 The second recessed portion 211 includes multiple interconnected cavities. Thus, the multiple interconnected cavities form a resonant cavity, and different cavities have different resonant frequencies. This allows the second vibrating portion 231 to emit a sound with a wider resonant frequency range, and the sound emitted by the second vibrating portion 231 can achieve a higher sound pressure level within a wider frequency range.

[0132] In some embodiments, see Figures 5 to 10The second exciter 12 is spaced apart from the center of the second recessed portion 211 in a direction parallel to the second housing 23. This excites the second vibrating portion 231 to generate a plurality of resonant modes, resulting in a wider resonant frequency range for the sound emitted by the second vibrating portion 231. This allows the sound emitted by the second vibrating portion 231 to achieve a higher sound pressure level over a wider frequency range. This also prevents the sound emitted by the second vibrating portion 231 from generating regular standing waves, reducing sound distortion.

[0133] In some embodiments, the following method may be adopted to prevent the user from perceiving the difference in loudness between the sound waves emitted by the first vibration part and the sound waves emitted by the second vibration part 231 , thereby reducing the user's sensitivity to the sound source.

[0134] It is understandable that when the loudness difference between the sound waves emitted by the first vibration part and the sound waves emitted by the second vibration part 231 at each octave is greater than 3dB, the following implementation method can also be adopted to prevent the user from perceiving the loudness difference between the sound waves emitted by the first vibration part and the sound waves emitted by the second vibration part 231.

[0135] Figure 11 This is a system architecture diagram of a refrigerator provided by an embodiment of the present invention. Figure 11 In some embodiments, it is also possible to Figure 1 On the basis of the above, the low-frequency sounds of the first exciter 11 and the second exciter 12 are optimized by controlling the input signals of the first exciter 11 and the second exciter 12.

[0136] Specifically, the refrigerator 1 includes a controller; a first high-pass filter 61, the input end of the first high-pass filter 61 is electrically connected to the controller, and is used to filter out sound wave signals below a preset frequency; a first low-pass filter 62, the input end of the first low-pass filter 62 is electrically connected to the controller, and is used to filter out sound wave signals above a preset frequency; a second high-pass filter 63, the input end of the second high-pass filter 63 is electrically connected to the controller, and is used to filter out sound wave signals below a preset frequency; a second low-pass filter 64, the input end of the second low-pass filter 64 is electrically connected to the controller, and is used to filter out sound wave signals above a preset frequency.

[0137] 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 all be types well known to those skilled in the art, and are not limited in this embodiment.

[0138] The preset frequency is the frequency point at which the loudness difference of the sound emitted by the first vibrating part and the second vibrating part 231 is large. For example, the preset frequency can be 400 Hz. In this way, the first high-pass filter 61 and the second high-pass filter 63 can pass high-frequency control signals above 400 Hz. The first low-pass filter 62 and the second low-pass filter 64 can pass low-frequency control signals below 400 Hz.

[0139] In some embodiments, the refrigerator 1 includes a first summing module 65 , and the output ends of the first low-pass filter 62 and the second low-pass filter 64 are electrically connected to the input end of the first summing module 65 , respectively.

[0140] That is, the first adding module 65 performs mixing processing on the low-frequency control signals below 400 Hz passed by the first low-pass filter 62 and the second low-pass filter 64 .

[0141] The summing method of the first summing module 65 may be a summing method well known in the art, and may be processed by an ARM processor or a digital signal processing (DSP).

[0142] In some embodiments, the refrigerator 1 also includes a first delay module 66, the input end of the first delay module 66 is electrically connected to the output end of the first summing module 65; a second summing module 67, the output end of the first high-pass filter 61 and the output end of the first delay module 66 are both electrically connected to the input end of the second summing module 67, and the output end of the second summing module 67 is electrically connected to the first exciter 11; a third summing module 68, the output end of the second high-pass filter 63 and the output end of the first delay module 66 are both electrically connected to the input end of the third summing module 68, and the output end of the third summing module 68 is electrically connected to the second exciter 12.

[0143] Among them, 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 ways, that is, the high-frequency control signal output by the second adding module 67 and the first high-pass filter 61 is added and output to the first exciter 11, and the high-frequency control signal output by the third adding module 68 and the second high-pass filter 63 is added and output to the second exciter 12.

[0144] In some embodiments, the output ends of the second summing module 67 and the third summing module 68 may be connected to a first amplifier 691 and a second amplifier 692 , respectively, for amplifying the control signals input to the first exciter 11 and the second exciter 12 , respectively.

[0145] Thus, the low-frequency control signals below 400 Hz input to the first exciter 11 and the second exciter 12 are identical, and the high-frequency control signals above 400 Hz input to the first exciter 11 and the second exciter 12 are approximately identical. Theoretically, the loudness difference between the sound excited by the first exciter 11 and the sound excited by the second exciter 12 in each octave is less than 3 dB.

[0146] Taking into account the differences between the first vibration part and the second vibration part 231, as well as the assembly differences at the installation positions of the first exciter 11 and the second exciter 12, the refrigerator 1 also includes a first delay module 66, which delays the summed low-frequency control signal through the first delay module 66, so that there is a phase difference between the low-frequency control signal and the high-frequency control signal.

[0147] According to the Haas effect theory, when the time difference between two sound waves from the same source reaching the listener is within 5ms-35ms, the listener cannot distinguish the two sound sources. The listener can only perceive the direction of the leading sound and cannot hear the lagging sound.

[0148] In this way, the user can only perceive the direction of the high-frequency sound above 400 Hz heard first, and it is difficult to perceive the direction of the low-frequency sound below 400 Hz heard later.

[0149] At this time, for high-frequency sounds higher than 400Hz, they vibrate and make sounds through the surface of the second shell 23, and it is difficult for users to perceive their position. For low-frequency sounds lower than 400Hz, users can only hear the superposition of the volumes of two low-frequency sounds lower than 400Hz, that is, there will be no problem of the sound being louder or softer, and users cannot perceive its position. There will also be no problem of users perceiving the sound source as being near or far at different positions, which reduces the user's sensitivity to the position of the sound source of the refrigerator 1.

[0150] In some embodiments, the refrigerator 1 can simultaneously improve the second recess 211 and the control signals of the first exciter 11 and the second exciter 12 .

[0151] Figure 12 Schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 1 . Figure 13 for Figure 12 System architecture diagram of a medium refrigerator.

[0152] In some embodiments, see Figure 12 and Figure 13 , refrigerator 1 can also be Figure 1Based on the above, an exciter capable of producing bass is provided. Specifically, the first exciter 11 and the second exciter 12 are provided on the door. The refrigerator 1 also includes a third exciter 13, which is provided on the storage portion and is used to drive the second housing 23 therein to vibrate and produce sound. In other words, considering the small area of ​​the door, the third exciter 13 can be provided on the outer wall of the housing 20 to produce low-frequency sound, while the first exciter 11 and the second exciter 12 located on the door produce high-frequency sound.

[0153] In some embodiments, the third actuator 13 may be one or more. Figure 12 A third exciter 13 may be provided on the top of the storage portion, and a third exciter 13 may also be provided on the side of the storage portion.

[0154] In some embodiments, the refrigerator 1 also includes a controller; a third high-pass filter 71, the input end of the third high-pass filter 71 is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the third high-pass filter 71 is electrically connected to the first exciter 11; a third low-pass filter 72, the input end of the third low-pass filter 72 is electrically connected to the controller, for filtering out sound wave signals above a preset frequency; a fourth high-pass filter 73, the input end of the fourth high-pass filter 73 is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the fourth high-pass filter 73 is electrically connected to the second exciter 12; a fourth low-pass filter 74, the input end of the fourth low-pass filter 74 is electrically connected to the controller, for filtering out sound wave signals above a preset frequency.

[0155] 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 all be types well known to those skilled in the art, and are not limited in this embodiment.

[0156] The preset frequency is the frequency point at which the loudness difference between the sounds emitted by the first vibrating part and the second vibrating part 231 is large. For example, the preset frequency may be 400 Hz. In this way, the third high-pass filter 71 and the fourth high-pass filter 73 can pass high-frequency control signals above 400 Hz. The third low-pass filter 72 and the fourth low-pass filter 74 can pass low-frequency control signals below 400 Hz.

[0157] 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 the input of the fourth summing module 75. The output of the fourth summing module 75 is electrically connected to the third exciter 13. That is, the fourth summing module 75 mixes the low-frequency control signals below 400 Hz passed by the third low-pass filter 72 and the fourth low-pass filter 74, and transmits the summed control signal to the third exciter 13 to control the third exciter 13 to emit low-frequency sounds below 400 Hz.

[0158] In some embodiments, the summing method of the fourth summing module 75 can be an existing summing method, and is processed by an ARM processor or a digital signal processing (DSP). The summing operation amount is low and the hardware requirements of the refrigerator 1 are low.

[0159] In some embodiments, the output ends of the third high-pass filter 71, the fourth high-pass filter 73 and the fourth adding module 75 can be connected to the third amplifier 761, the fourth amplifier 762 and the fifth amplifier 763, respectively, for amplifying the control signals input to the first exciter 11, the second exciter 12 and the third exciter 13, respectively.

[0160] In some embodiments, the refrigerator 1 may improve the second recessed portion 211 and simultaneously provide a third actuator 13 on the storage portion, which is not limited in this embodiment.

[0161] Figure 14 Schematic diagram of the structure of the refrigerator provided by the embodiment of the present invention Figure 2 . Figure 15 for Figure 14 System architecture diagram of a medium refrigerator.

[0162] In some embodiments, the refrigerator 1 can also Figure 1 A speaker capable of producing bass is provided on the basis of the refrigerator 1. Specifically, the refrigerator 1 further includes a bass speaker 14, which is used to produce low-frequency sound. A third recessed portion for accommodating the bass speaker 14 is provided on the thermal insulation layer 21, and a sound outlet is provided at a position of the second shell 23 corresponding to the third recessed portion. The sound outlet communicates with the inner and outer sides of the second shell 23.

[0163] The woofer 14 can be a woofer well known to those skilled in the art, capable of emitting low-frequency sounds. A third recessed portion is provided on the insulation layer 21 to accommodate the woofer 14. The third recessed portion can be positioned anywhere within the enclosure 20. For example, the woofer 14 can be positioned at the top or bottom of the enclosure 20.

[0164] The second housing 23 is provided with a sound outlet hole, so that the sound emitted by the woofer 14 can be transmitted to the outside of the refrigerator 1 through the sound outlet hole. The sound outlet hole can be a circular hole, a rectangular hole, etc. The number of the sound outlet holes can be multiple.

[0165] In some embodiments, the refrigerator 1 further includes: a second breathable protective member, which is arranged at the sound outlet to prevent foreign matter from entering the third recessed portion.

[0166] The second breathable protective member has good ventilation performance and does not affect the mutual circulation between the hot air in the third recessed portion and the cold air outside the refrigerator 1. At the same time, the second breathable protective member can also prevent foreign matter such as water, dust, and dander from entering the third recessed portion through the sound outlet. In other words, the second breathable protective member can provide better protection for the woofer 14.

[0167] In some embodiments, the second breathable protective component includes a polytetrafluoroethylene layer and a textile layer, and the polytetrafluoroethylene layer and the textile layer are bonded to each other. The polytetrafluoroethylene layer and the textile layer have good air permeability. The textile layer can protect the polytetrafluoroethylene layer to prevent foreign matter from clogging the polytetrafluoroethylene layer.

[0168] In some embodiments, the second breathable protective member is detachably connected to the refrigerator 1 so that the second breathable protective member can be cleaned or replaced regularly.

[0169] In some embodiments, the refrigerator 1 also includes a controller; a fifth high-pass filter 81, the input end of the fifth high-pass filter 81 is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the fifth high-pass filter 81 is electrically connected to the first exciter 11; a fifth low-pass filter 82, the input end of the fifth low-pass filter 82 is electrically connected to the controller, for filtering out sound wave signals above a preset frequency; a sixth high-pass filter 83, the input end of the sixth high-pass filter 83 is electrically connected to the controller, for filtering out sound wave signals below a preset frequency, and the output end of the sixth high-pass filter 83 is electrically connected to the second exciter 12; a sixth low-pass filter 84, the input end of the sixth low-pass filter 84 is electrically connected to the controller, for filtering out sound wave signals above a preset frequency.

[0170] 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 all be types well known to those skilled in the art, and are not limited in this embodiment.

[0171] The preset frequency is the frequency point at which the loudness difference between the sounds emitted by the first vibrating part and the second vibrating part 231 is large. For example, the preset frequency may be 400 Hz. In this way, the fifth high-pass filter 81 and the sixth high-pass filter 83 can pass high-frequency control signals above 400 Hz. The fifth low-pass filter 82 and the sixth low-pass filter 84 can pass low-frequency control signals below 400 Hz.

[0172] In some embodiments, the fifth summing module 85, the output of the fifth low-pass filter 82, and the output of the sixth low-pass filter 84 are all 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. Specifically, the fifth summing module 85 mixes the low-frequency control signals below 400 Hz passed by the fifth low-pass filter 82 and the sixth low-pass filter 84, and transmits the summed control signal to the woofer 14 to control the woofer 14 to emit low-frequency sounds below 400 Hz.

[0173] In some embodiments, the summing method of the fifth summing module 85 can be an existing summing method, and is processed by an ARM processor or a digital signal processing (DSP). The amount of summing operation is low and the hardware requirements of the refrigerator 1 are low.

[0174] In some embodiments, the output ends of the fifth high-pass filter 81, the sixth high-pass filter 83 and the fifth adding module 85 can be connected to the sixth amplifier 861, the seventh amplifier 862 and the eighth amplifier 863, respectively, for amplifying the control signals input to the first exciter 11, the second exciter 12 and the woofer 14, respectively.

[0175] In some embodiments, the refrigerator 1 may improve the second recessed portion 211 and simultaneously provide a woofer 14 , which is not limited in this embodiment.

[0176] Figure 16 A schematic structural diagram of a refrigerator provided by an embodiment of the present invention in which the first exciter and the second exciter include voice coils. Figure 17 for Figure 16 Schematic diagram of the structure of the exciter.

[0177] In some embodiments, see Figure 16 and Figure 17 The first exciter 11 and the second exciter 12 have the same structure and are both electromagnetic exciters. The electromagnetic exciter includes a vibrating voice coil 121, a spider 122, a coil, and a magnetic component.

[0178] The magnetic assembly includes a first magnetic conductive part, a second magnetic conductive part and a magnet. The first magnetic conductive part can be a T iron or a U iron, and the second magnetic conductive part is a washer. Taking the U iron as an example, the magnet and the washer are both located in the cavity surrounded by the U iron. There is a magnetic air gap between the outer wall of the magnet and the washer and the inner wall of the U iron. The voice coil 121 extends into the magnetic air gap and surrounds the magnet and the washer. The magnetic assembly is used to provide a stable magnetic field in the magnetic air gap. A variable control signal can be input into the coil to generate an alternating magnetic field. The coil can move back and forth along its own circumference in the superimposed magnetic field of the alternating magnetic field and the stable magnetic field.

[0179] The damper 122 surrounds the voice coil 121. For example, the damper 122 can be connected to the outer wall of the voice coil 121. The damper 122 is an elastic member and can elastically deform with the vibration of the voice coil 121 to prevent the voice coil 121 from deflecting when moving back and forth.

[0180] In some embodiments, the refrigerator 1 further includes a heat transfer member 30 , and the voice coil 121 is connected to the second shell 23 via the heat transfer member 30 . The vibration of the voice coil 121 can be transmitted to the second shell 23 via the heat transfer member 30 to achieve vibration and sound generation of the second shell 23 .

[0181] In some embodiments, the heat transfer element 30 is made of a heat-conductive material, and the heat generated by the voice coil 121 can be transferred to the second housing 23 through the heat transfer element 30 .

[0182] The voice coil 121 can be made of materials well known to those skilled in the art, such as kraft paper or aromatic polyamide. In some embodiments, the voice coil 121 is made of a heat-conducting material, such as aluminum or other metal, which is lightweight and has high thermal conductivity, thereby increasing the heat exchange between the heat transfer element 30 and the voice coil 121.

[0183] In this way, 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 and heated, and 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 the air and exchanges heat with the air to cool it down, thereby reducing the temperature of the heat transfer element 30. In this way, the heat of the voice coil 121 can continue to be conducted to the heat transfer element 30. The voice coil 121 has a better heat dissipation effect, which prevents the voice coil 121 from overheating, resulting in a smaller vibration amplitude of the voice coil 121.

[0184] The heat transfer member 30 may be a metal member such as a bolt or screw. In some embodiments, the heat transfer member 30 comprises a viscous thermally conductive adhesive. Thus, by applying the thermally conductive adhesive between the voice coil 121 and the second housing 23, the voice coil 121 can be fixed to the second housing 23, which facilitates assembly and provides high fixation stability.

[0185] In some embodiments, the heat transfer element 30 can be silicone thermal conductive adhesive, polyurethane thermal conductive adhesive, etc.

[0186] Figure 18 for Figure 17 Schematic diagram of the structure of the middle support Figure 1 . Figure 19 for Figure 17 Schematic diagram of the structure of the middle support Figure 2 . Figure 20 for Figure 18 and Figure 19 Cross-sectional view of the middle support.

[0187] See also Figures 16 to 20 Considering that the voice coil 121 is a thin-walled cylindrical structure and the end surface area of ​​the voice coil 121 is small, in some embodiments, the refrigerator 1 further includes a support member 40, which has: a plug-in portion 41, and the voice coil 121 is plugged into the plug-in portion 41; a connecting portion 42, and the connecting portion 42 is connected to the plug-in portion 41, and the connecting portion 42 passes through the side of the support member 40 facing the second shell 23, and the heat transfer member 30 is filled in the plug-in portion 41 and the connecting portion 42.

[0188] The support member 40 may be a columnar structure or a Figures 18 to 20 The cylindrical structure shown in FIG. The plug-in portion 41 is provided on one end surface of the support member 40. The voice coil 121 and the plug-in portion 41 are plugged into each other and fixed to each other via the heat transfer member 30. This provides a high degree of fixation stability between the voice coil 121 and the support member 40. Furthermore, the voice coil 121 and the heat transfer member 30 are in contact with each other, allowing heat from the voice coil 121 to be effectively transferred to the heat transfer member 30.

[0189] The other opposite end surface of the support member 40 contacts the second housing 23 . Compared with the end surface area of ​​the voice coil 121 , the contact area between the support member 40 and the second housing 23 is larger, and the support stability is higher.

[0190] The support member 40 also has a connecting portion 42. One end of the connecting portion 42 connects to the plug portion 41, and the other end extends through the end surface of the support member 40. This allows the heat transfer member 30 to flow through the plug portion 41 into the connecting portion 42, thereby bonding and securing the support member 40 to the second housing 23. At this point, the heat transfer member 30 is fixedly connected to the second housing 23 and the voice coil 121, respectively. Heat from the voice coil 121 can be transferred to the second housing 23 via the heat transfer member 30.

[0191] In some embodiments, the radial dimension of the end of the communication portion 42 close to the second housing 23 is larger than the radial dimension of the end of the plug-in portion 41 away from the second housing 23 .

[0192] To ensure stable insertion of the connector 41 and the voice coil 121, the radial dimension of the connector 41 at the end away from the second housing 23 is comparable to the thickness of the voice coil 121. The gap between the connector 41 and the voice coil 121 is filled with the heat transfer member 30. Of course, the radial dimension of the connector 41 at the end closer to the second housing 23 can be larger than the thickness of the voice coil 121 to accommodate a larger amount of the heat transfer member 30.

[0193] So, see Figure 20 The radial dimension of the connecting portion 42 along the radial direction of the voice coil 121 can be fixed. In this case, to effectively fix the support member 40, the radial dimension of the connecting portion 42 along the radial direction of the voice coil 121 can be greater than the thickness of the voice coil 121. This increases the fixing area between the support member 40 and the second housing 23.

[0194] The radial dimension of the connecting portion 42 can increase in a stepped manner or gradually from the end close to the voice coil 121 to the end away from the voice coil 121 to increase the coating area of ​​the heat transfer member 30 on the second shell 23 and improve the fixing stability of the support member 40.

[0195] In some embodiments, when the second housing 23 is made of different materials, the second housing 23 may have different thicknesses. For example, the thickness of the second housing 23 made of steel may be 1 mm to 2 mm, and the thickness of the second housing 23 made of glass may be 2 mm to 3 mm.

[0196] Then, when the thickness of the second shell 23 is small, the rigidity of the second shell 23 is small, and the second shell 23 is easily deformed.

[0197] Figure 21 for Figure 16 Structural diagram when a reinforcement plate is provided on the second shell Figure 1 . Figure 22 for Figure 21 Schematic diagram of the reinforcement plate structure when a honeycomb sandwich panel is set. Figure 23 for Figure 16 Structural diagram when a reinforcement plate is provided on the second shell Figure 2 .

[0198] See also Figures 21 to 23 In some embodiments, the refrigerator 1 further includes a sounding plate 50 , which is attached to a side of the second shell 23 corresponding to the recessed portion, and the voice coil 121 is fixedly connected to the sounding plate 50 , and the damping of the sounding plate 50 is greater than the damping of the second shell 23 .

[0199] The sounding plate 50 can be fixedly connected to the second housing 23 by fasteners such as bolts. In some embodiments, both sides of the sounding plate 50 are bonded to the second housing 23 and the voice coil 121 via heat transfer elements 30, resulting in high fixation stability and a large amount of heat exchange between the sounding plate 50 and the second housing 23.

[0200] When the second housing 23 is thin, its damping is low and its stiffness is high, making it more susceptible to resonant sounds and high-frequency squeaking. By providing the sounding plate 50 with greater damping, the damping and stiffness of the first and second vibrating parts 231 are increased, expanding the frequency range of sound emitted by the second housing 23 and preventing resonant sounds and high-frequency squeaking from the second housing 23. This also prevents significant peaks and valleys in the audio response of the second housing 23 and distortion that could affect the listening experience.

[0201] The thickness of the sounding plate 50 may be less than 3 mm. For example, the thickness of the sounding plate 50 in this embodiment may be 2 mm.

[0202] Because the exciter has a magnet, the installation of the sounding plate 50 increases the distance between the exciter and the second housing 23. This reduces the magnetic attraction between the second housing 23 and the exciter, preventing the magnetic attraction from affecting the exciter's vibrations, when the second housing 23 is made of a magnetic metal such as iron.

[0203] Considering that the first vibration part and the second vibration part 231 can vibrate with the sounding plate 50, while the part of the second shell 23 connected to the insulation layer 21 is fixed, the sounding plate 50 can be respectively arranged at the middle position of the first vibration part and the second vibration part 231.

[0204] In some embodiments, there is an avoidance gap between the edge of the sounding plate 50 and the edge of the first vibrating portion, and between the edge of the sounding plate 50 and the edge of the second vibrating portion 231, and the avoidance gap is arranged along the circumference of the sounding plate 50. Exemplarily, the width of the avoidance gap can be 5mm-15mm. Compared with the arrangement in which the sounding plate 50 fits the inner wall of the recessed portion, the width of the avoidance gap in the embodiment of the present application is larger, and the portion of the second shell 23 corresponding to the avoidance gap can constitute a transition area and vibrate with the sounding plate 50, so as to avoid the gap between the edge of the sounding plate 50 and the edge of the recessed portion being too small, resulting in the portion of the second shell 23 corresponding to the opening of the recessed portion being subjected to excessive shear force when the second shell 23 vibrates and cannot obtain sufficient amplitude, thereby affecting the volume.

[0205] In order to achieve heat conduction between the voice coil 121 and the second shell 23, in some embodiments, the sounding board 50 includes a sounding board body 51 and a heat conducting part 52 for heat conduction, the voice coil 121 is connected to the heat conducting part 52, and the heat transfer element 30 is respectively arranged between the second shell 23 and the heat conducting part 52 and between the heat conducting part 52 and the voice coil 121.

[0206] At this time, the heat conducting portion 52 forms part of the sounding plate 50 and vibrates along with the sounding plate 50. After the voice coil 121 is connected to the sounding plate 50 via the heat transfer member 30, heat from the voice coil 121 can be transferred to the heat conducting portion 52 via the heat transfer member 30, and heat from the heat conducting portion 52 can be transferred to the second housing 23 via the heat transfer member 30.

[0207] The heat conducting portion 52 may be made of silicone thermal conductive adhesive, polyurethane adhesive, polyurethane thermal conductive and electrically conductive adhesive, thermal grease, etc.

[0208] In some embodiments, the sound panel 50 is a sandwich panel, wherein the sound emitted by the sandwich panel has a higher amplitude and a lower frequency than the sound emitted by a steel panel or a glass panel. That is, the sound emitted by the sandwich panel has a better sound quality than the sound emitted by a steel panel or a glass panel.

[0209] In some embodiments, the sound board 50 includes a core material 53 and a skin (not shown), which is attached to opposite sides of the core material 53; wherein the skin is a heat-conducting material, and the heat-conducting part 52 is arranged at a position of the core material 53 corresponding to the voice coil 121.

[0210] The material and structure of the core material 53 vary depending on the type of sandwich panel. For example, the sounding board 50 can be a honeycomb sandwich panel, such as an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, etc. In this case, the core material 53 is a plate-like structure with multiple through holes, and the core material 53 can be made of aluminum, aramid, kraft paper, etc. Figure 20 The heat conducting portion 52 may be filled in the through hole position opposite to the voice coil 121 .

[0211] The sounding board 50 can also be a foam sandwich panel, such as a polyvinyl chloride (PVC) foam sandwich panel, a polymethacrylimide (PMI) foam sandwich panel, etc. The foam sandwich panel is formed by a foaming process. In this case, the core material 53 has a receiving groove for accommodating the heat conducting portion 52, and the heat conducting portion 52 is arranged in the receiving groove. Specifically, when the foam sandwich panel is formed, the heat conducting portion 52 can be arranged between the first skin and the second skin, and when the core material 53 is foamed and formed, it can be filled between the first skin and the second skin and surrounded by the outside of the heat conducting portion 52. Of course, after the core material 53 is formed, a hole can be opened in the foam sandwich panel to form a receiving groove, and in this case, the heat conducting portion 52 can be filled in the receiving groove.

[0212] To improve the heat conduction efficiency between the voice coil 121 and the heat conducting portion 52 and between the heat conducting portion 52 and the second housing 23 , the coverings on both sides of the core material 53 are made of heat conducting materials, such as carbon fiber, aluminum foil, etc.

[0213] In this way, the heat of the voice coil 121 can be transferred to the skin through the heat transfer element 30, and the heat of the skin is conducted to the heat conducting part 52. Then, the heat of the heat conducting part 52 can be conducted to the other side of the skin, and the side skin can be conducted to the second shell 23 through the heat transfer element 30 for heat dissipation.

[0214] To achieve heat conduction between the voice coil 121 and the second housing 23, refer to Figure 23 In some embodiments, the sounding plate 50 includes a relief portion that connects the two sides of the sounding plate 50. The voice coil 121 can pass through the relief portion and be fixedly connected to the second housing 23. In this case, the voice coil 121 is directly connected to the second housing 23 through the heat transfer element 30, which reduces the heat transfer path and improves heat transfer efficiency.

[0215] A second aspect of an embodiment of the present invention provides a sound-generating device comprising multiple sound-generating elements, wherein the loudness difference of the sound waves emitted by the multiple sound-generating elements is less than 3dB per octave. This allows the user to better understand the sound source sensitivity of the sound-generating device, thereby avoiding issues such as fluctuating sound volume and the location of the sound source being too close or too far away.

[0216] The sound-emitting element may be an exciter or a loudspeaker, etc.

[0217] In some embodiments, depending on the type of sound-generating device, the sound waves of the sound-generating device can be controlled in different ways. For example, the size of the recessed portion housing the driver can be improved, the control method for the driver's control signal can be improved, a driver capable of producing bass can be provided, and a woofer 14 capable of producing bass can be provided.

[0218] In some embodiments, the sound-emitting device is any one of a television, a mobile phone, headphones, and a speaker. That is, through the above method, different sound-emitting devices with multiple sound-emitting parts can be adjusted to reduce the user's sensitivity to the sound source of the sound-emitting device and optimize the user experience.

[0219] When the sound-generating device is a TV phone, earphone or speaker, the sound-generating part can be an exciter, and by improving the control signal control method of the exciter (such as Figure 11 to reduce the user's sensitivity to the sound source of the TV.

[0220] Of course, it is also possible to improve the control signal control method of the driver and simultaneously provide a bass speaker 14 or provide a driver capable of producing bass, which is not limited in this embodiment.

[0221] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0222] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicates that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0223] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigerator, characterized in that: include: an actuator assembly, the actuator assembly comprising a first actuator and a second actuator; A box body, wherein a storage area is provided in the box body; the box body comprises a heat-insulating layer, a first shell and a second shell, wherein the first shell and the second shell are respectively attached to the inner and outer sides of the heat-insulating layer; The thermal insulation layer is provided with a first recessed portion and a second recessed portion, the first recessed portion and the second recessed portion are spaced apart from each other, the first exciter is located in the first recessed portion, and the second exciter is located in the second recessed portion; the second shell respectively covers the opening of the first recessed portion and the opening of the second recessed portion, the portion of the second shell corresponding to the first recessed portion constitutes a first vibrating portion, and the portion of the second shell corresponding to the second recessed portion constitutes a second vibrating portion; The first exciter is connected to the first vibrating part and is used to drive the first vibrating part to vibrate and produce sound. The second exciter is connected to the second vibrating part and is used to drive the second vibrating part to vibrate and produce sound. The difference in loudness between the sound waves emitted by the first vibrating part and the sound waves emitted by the second vibrating part at each octave is less than 3dB. The refrigerator includes a bracket and a control panel, both of which are located in the first recessed portion, the bracket is fixed to the first vibrating portion, the control panel is fixed to the bracket, and the first exciter and the second exciter are electrically connected to the control panel respectively; The area of ​​the second vibrating portion is smaller than the area of ​​the first vibrating portion; The second exciter and the center of the second recess are spaced apart in a direction parallel to the second shell; It also includes a sounding board, which is attached to the side of the second shell corresponding to the first recessed portion and the second recessed portion. The voice coils of the first exciter and the second exciter are fixedly connected to the sounding board, and the damping of the sounding board is greater than the damping of the second shell.

2. The refrigerator according to claim 1, wherein: The area of ​​the second vibration part is 0.7 times to 0.85 times the area of ​​the first vibration part.

3. The refrigerator according to claim 1, wherein: The second recessed portion has the same recessed depth at different positions.

4. The refrigerator according to claim 1, wherein The second recessed portion has a first recessed depth at a position corresponding to the second actuator, and has a second recessed depth at other positions of the second recessed portion, wherein the first recessed depth is greater than the second recessed depth.

5. The refrigerator according to claim 1, wherein At least one heat dissipation channel is provided in the thermal insulation layer, one end of the heat dissipation channel is connected to the inner wall surface of the second recessed portion, and the other end of the heat dissipation channel is connected to the top wall surface or the bottom wall surface of the thermal insulation layer; the second shell is provided with a heat dissipation hole, and the heat dissipation hole is arranged opposite to the heat dissipation channel; The refrigerator is further provided with a first air-permeable protective member, which is used to prevent foreign matter from entering the heat dissipation channel.

6. The refrigerator according to any one of claims 1 to 5, characterized in that: The first exciter and the second exciter have the same structure and both include a vibrating voice coil; The heat transfer member is connected to the second shell through the heat transfer member, the vibration of the voice coil can be transferred to the second shell through the heat transfer member, and the heat generated by the voice coil can be conducted to the second shell through the heat transfer member.

7. The refrigerator according to claim 6, characterized in that The refrigerator further includes a support member, wherein the support member has: A plug-in portion, the voice coil being plugged into the plug-in portion; The communicating portion is connected to the plug-in portion and passes through a side of the supporting member facing the second shell. The heat transfer member is filled in the plug-in portion and the communicating portion.

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