Refrigerator with a door

Description

technical field

The invention relates to the technical field of sound generating equipment, in particular to a refrigerator.

Background technique

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

The refrigerator includes an insulation layer and a first casing and a second casing arranged on both sides of the insulation layer. The insulation layer is used to maintain the temperature inside the refrigerator within a preset range. The first casing is attached to the inner wall of the insulation layer. , so as to enclose a storage area for accommodating food, etc., and the second casing is attached to the outside of the insulation layer to form protection for the refrigerator. The refrigerator also includes a display panel and a speaker, the speaker is connected to the display panel or the second casing, the second casing is provided with a through sound hole, the sound from the speaker can be transmitted through the sound hole for the user to listen to or realize the user Voice interaction with refrigerator.

However, the sound hole is exposed to the air, so the dustproof and waterproof function of the speaker cannot be realized.

Contents of the invention

In view of the above problems, an embodiment of the present invention provides a refrigerator with high sealing performance, and the sound emitted by the refrigerator has a relatively high sound pressure level and relatively flat frequency response.

In order to achieve the above purpose, embodiments of the present invention provide the following technical solutions:

An embodiment of the present invention provides a refrigerator, which includes an exciter; an outer shell with a storage area inside; the outer shell includes an insulating layer, a first shell and a second shell, and the first shell and the second shell It is arranged on the inner and outer sides of the insulation layer; the insulation layer is provided with an accommodation part, the second housing covers the opening of the accommodation part, the actuator is arranged in the accommodation part, and the actuator is connected with the second housing for Drive the second shell to vibrate and generate sound waves.

That is to say, the embodiment of the present application uses the exciter to drive the second housing to vibrate and produce sound. There is no need to set a sound outlet on the second housing, and the exciter is not exposed to the air. The second housing has better sealing performance and good dustproof performance. Water resistance. At the same time, the planar sound has a larger sound pressure level and a relatively flat frequency response than the loudspeaker sound.

In some embodiments, a concave-convex structure is provided on the inner wall of the accommodating part, and the concave-convex structure is used for multiple reflections of the sound waves propagating into the interior. In this way, the sound wave propagating into the concave-convex structure can be reflected and absorbed multiple times in the concave-convex structure, so as to reduce the energy of the sound wave reflection, achieve the purpose of reducing or eliminating stray sound, and avoid the sound wave emitted by the exciter from being trapped in the accommodating part. Distorted by multiple reflections.

In some embodiments, the concavo-convex structure includes a plurality of protrusions, the plurality of protrusions are arranged at intervals and protrude from the inner wall of the accommodating part, and the structure is relatively simple and easy to form.

In some embodiments, the accommodating portion includes multiple cavities, the multiple cavities communicate with each other, and the volumes of the multiple cavities are different.

In this way, a plurality of cavities communicate with each other to form a resonant cavity, and different cavities have different resonant frequencies, so that the resonant frequency range of the sound emitted by the second casing is wider, and the sound emitted by the second casing can be in a wider frequency range. obtain a higher sound pressure level.

In some embodiments, the center of the actuator and the center of the accommodating portion are spaced apart in a direction parallel to the second housing. In this way, the second casing can be excited to generate more resonant modes, so that the resonant frequency range of the sound emitted by the second casing is wider, and the sound emitted by the second casing can obtain greater resonance in a wider frequency range. sound pressure level. At the same time, it can also prevent the sound emitted by the second housing from generating regular standing waves, thereby reducing sound distortion.

In some embodiments, a reinforcing plate is provided on a part of the second housing corresponding to the accommodating portion, the exciter is connected to the reinforcing plate, and the damping of the reinforcing plate is greater than that of the second housing. In this way, the rigidity of the second casing can be improved, and the frequency range of the sound emitted by the second casing can be expanded to avoid excessive fluctuations in the frequency response.

In some embodiments, there is an avoidance gap between the edge of the reinforcing plate and the edge of the opening of the accommodating part, and the avoidance gap is arranged along the circumferential direction of the reinforcement plate, so that the part of the second housing corresponding to the avoidance gap constitutes a transition area In order to avoid that the gap between the edge of the reinforcing plate and the opening of the accommodating part is too small, when the reinforcing plate vibrates, the second housing cannot obtain sufficient amplitude due to the shearing force and affect the sound volume.

In some embodiments, the reinforcement board is any one of honeycomb sandwich board, foam sandwich board, wood sandwich board and acrylic board.

In some embodiments, the bottom wall of the accommodating portion is a plane; or, the bottom wall of the accommodating portion is adapted to the shape of the actuator.

In this way, the position of the refrigerator corresponding to the accommodating portion can still have a heat insulating layer with a set thickness, so as to prevent the low temperature in the refrigerator from being lost through the accommodating portion, and the refrigerator has a better heat preservation effect.

In some embodiments, the housing includes a body and a switch door, the storage area is disposed on the body, and the switch door is used to cover the storage area; the accommodating portion is disposed on the body and/or the switch door. That is, actuators can be installed at different positions of the refrigerator, and the fixed range is relatively large.

In some embodiments, the actuator is any one of an electromagnetic actuator, a magnetostrictive actuator and a piezoelectric actuator, which has high applicability.

In some embodiments, when the exciter is an electromagnetic exciter, the exciter is connected to the second casing, and the exciter is spaced apart from the bottom wall of the accommodating part, which helps to make the second casing emit low-frequency sound.

In some embodiments, the electromagnetic exciter includes a voice coil, a first magnetic part, and a magnetically conductive part. The voice coil and the magnetically conductive part are fixedly connected to the second housing respectively, and the magnetically conductive part can be in the magnetic field generated by the first magnetic part. It moves relative to the voice coil and drives the second housing to vibrate and produce sound. In this way, the heat exchange between the voice coil and the second casing is facilitated to realize heat dissipation of the voice coil.

In some embodiments, when the actuator is a magnetostrictive actuator, the actuator is fixedly connected to the insulation layer, and the actuator has high fixing stability.

In some embodiments, the magnetostrictive actuator includes: a second magnetic member; a coil for generating an alternating magnetic field according to a control signal; Telescopic deformation occurs along the axial direction of the coil; the telescopic member is connected with the second casing to drive the second casing to reciprocate; wherein, the reciprocating movement direction of the second casing is set at an included angle with the axial direction of the coil.

In this way, it is possible to avoid the installation of a relatively thick thermal insulation layer due to the large size of the actuator along the coil axis, thereby reducing the manufacturing cost of the refrigerator.

In addition to the technical problems solved by the embodiments of the present invention described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by the refrigerator provided by the embodiments of the present invention , other technical features included in the technical solution and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings that need to be used in the descriptions of the embodiments or related technologies. Obviously, the drawings in the following description are the For some embodiments of the invention, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

Fig. 2 is a schematic structural view of the refrigerator in Fig. 1 when the thickness of the second casing is relatively small;

Fig. 3 is a structural schematic diagram of the refrigerator in Fig. 1 when the thickness of the second casing is relatively large;

Fig. 4 is a schematic diagram of the structure of the accommodating part in Fig. 1 to Fig. 3;

FIG. 5 is a second structural schematic diagram of the accommodating part in FIGS. 1 to 3;

Fig. 6 is a schematic diagram of the third structure of the accommodating part in Fig. 1 to Fig. 3;

Fig. 7 is a schematic view 4 of the structure of the accommodating part in Fig. 1 to Fig. 3;

Fig. 8 is a structural schematic diagram 1 when the exciter in Fig. 1 is an electromagnetic exciter;

Fig. 9 is a structural schematic diagram II when the exciter in Fig. 1 is an electromagnetic exciter;

Fig. 10 is a structural schematic diagram three when the exciter in Fig. 1 is an electromagnetic exciter;

Fig. 11 is a structural schematic diagram 1 when the electromagnetic exciter in Fig. 10 drives the second housing to vibrate;

Fig. 12 is a structural schematic diagram II when the electromagnetic exciter in Fig. 10 drives the second housing to vibrate;

Fig. 13 is a structural schematic diagram four when the exciter in Fig. 1 is an electromagnetic exciter;

Fig. 14 is a schematic diagram of the fifth structure when the exciter in Fig. 1 is an electromagnetic exciter.

Reference signs:

10: exciter; 11: electromagnetic exciter; 111: voice coil; 112: magnetic conductive part; 113: thermal conductive part;

20: shell; 21: insulation layer; 211: accommodation part; 2111: bottom wall; 212: raised part; 213: first cavity; 214: second cavity; 22: first shell; 23: second Two shells; 24: body; 25: switch door;

30: reinforcement plate;

L: Avoid gaps.

detailed description

In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the related art, a refrigerator includes an insulation layer and a first casing and a second casing arranged on the inner and outer sides of the insulation layer. Wherein, in order to realize the sound of the refrigerator or the voice interaction between the user and the refrigerator, the second housing of the refrigerator is provided with a speaker, and the second housing is provided with a through sound hole, and the sound from the speaker can be played into the environment through the sound hole. However, since the sound hole is exposed to the environment, it cannot provide a waterproof and dustproof protection function for the speaker.

In view of this, the refrigerator provided in the embodiment of the present application is provided with an exciter, and the exciter is arranged on a side of the insulation layer close to the second casing, and the exciter can drive the second casing to vibrate and produce sound when working. In this way, without destroying the integrity of the second housing, the surface vibration sound of the refrigerator is realized, the protection performance is better, and the sound pressure level of the sound is higher.

Fig. 1 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention. Fig. 2 is a schematic structural view of the refrigerator in Fig. 1 when the thickness of the second casing is relatively small. Fig. 3 is a schematic structural view of the refrigerator in Fig. 1 when the thickness of the second casing is relatively large.

Please refer to Fig. 1 to Fig. 3, the embodiment of the present application provides a kind of refrigerator, and it comprises exciter 10; Shell 20, is provided with storage area in shell 20; The housing 23, the first housing 22 and the second housing 23 are attached to the inner and outer sides of the insulation layer 21 respectively; Opening, the exciter 10 is disposed in the accommodating portion 211 , and the exciter 10 is connected with the second housing 23 for driving the second housing 23 to vibrate and generate sound waves.

Specifically, the refrigerator is a refrigeration device, which is used to keep food or other items at a constant low temperature. Storage areas may include refrigerated and frozen areas.

The housing includes an insulation layer 21 , a first housing 22 and a second housing 23 . The insulation layer 21 can be made of polyurethane foam, and the material and molding process of the insulation layer 21 are not limited in this embodiment. The first housing 22 and the second housing 23 are attached to the inner and outer sides of the insulation layer 21 respectively. The first housing 22 can be plastic, and the material of the second housing 23 can be metal, such as stainless steel, aluminum, etc. Higher, longer service life. In some embodiments, the material of the second housing 23 may also be glass, polycarbonate, carbon fiber or other composite materials.

The refrigerator also includes an exciter 10 for driving the second casing 23 to vibrate and produce sound. Wherein, the refrigerator is generally a cube structure, and the actuator 10 can be arranged on any side of the refrigerator.

In some embodiments, the housing 20 includes a body 24 and a switch door 25, the storage area is disposed on the body 24, and the switch door 25 is used to cover the storage area; the accommodating portion 211 is disposed on the body 24 and/or the switch door 25 superior. Of course, when the storage area includes a refrigerating area and a freezing area, the number of switch doors 25 corresponds to two.

At this time, the exciter 10 can be arranged on the body 24 or on the switch door 25 .

In some embodiments, there are multiple exciters 10, and multiple exciters 10 can form a stereo system to optimize user experience. When there are multiple actuators 10, the actuators 10 can be installed on the body 24 and the switch door 25 at the same time.

In some embodiments, the insulation layer 21 is provided with a housing part 211 , the opening of the housing part 211 faces to the side of the second housing 23 , and the actuator 10 is disposed in the housing part 211 . The projection shape of the accommodating portion 211 on the second housing 23 may be a relatively regular geometric shape such as a rectangle, a circle, an ellipse, or a triangle, or other irregular geometric shapes.

In some embodiments, the recessed depth of the accommodating portion 211 can be smaller than the thickness of the insulation layer 21, so that the side of the accommodating portion 211 facing the first casing 22 still has a certain thickness of the insulation layer 21, so as to avoid the inside of the refrigerator. The low temperature of the refrigerator is dissipated through the accommodating part 211, and the insulation effect of the refrigerator is better.

The opening of the second housing 23 covers the opening of the accommodation part 211, the part of the second housing 23 connected to the insulation layer 21 remains fixed, and the part corresponding to the opening of the accommodation part 211 of the second housing 23 constitutes a vibration The exciter 10 can drive this part of the second casing 23 to vibrate and produce sound.

In this way, in this embodiment, no holes are opened on the second housing 23, and the integrity of the second housing 23 is not damaged. The second housing 23 has better sealing and protection performance for the insulation layer 21, the actuator 10, and the like. Compared with the sound produced by the speaker, the surface vibration sound has a higher sound pressure level and a relatively flat frequency response, and the sound quality is better.

In some embodiments, the refrigerator also includes a decoding module, an amplifier, a transducer, a controller, and a Bluetooth module or a WiFi module, wherein the Bluetooth module or the WiFi module is used to receive audio data information from a mobile phone, a computer, etc., and the decoding module decodes Stereo audio signal, the amplifier is connected with Bluetooth module or WiFi module, the stereo audio signal decoded by the decoding module can be amplified by the amplifier, and the amplified stereo audio signal can be sent to the transducer to realize the conversion of electrical signal and acoustic signal.

In some embodiments, the inner wall of the accommodating portion 211 may be relatively smooth.

It can be known from the above embodiments that the opening of the accommodating portion 211 is closed by the second casing 23 , and the accommodating portion 211 is a closed space. In this way, part of the sound emitted by the vibration of the second housing 23 will be reflected multiple times in the accommodating portion 211 to form stray sounds.

FIG. 4 is a first structural schematic diagram of the accommodating portion in FIGS. 1 to 3 . FIG. 5 is a second structural schematic diagram of the accommodating portion in FIGS. 1 to 3 . FIG. 6 is a third schematic structural view of the accommodating portion in FIGS. 1 to 3 . FIG. 7 is a fourth structural schematic diagram of the accommodating portion in FIGS. 1 to 3 .

Please refer to FIG. 4 to FIG. 7 , in some embodiments, a concave-convex structure is provided on the inner wall of the accommodating portion 211 , and the concave-convex structure is used for multiple reflections of the sound waves propagating inside. In this way, the propagation of the sound wave is disturbed by the concave-convex structure, so that the sound wave is reflected multiple times in the concave-convex structure, which can consume the energy of the sound wave and achieve the effect of eliminating stray sound.

In some embodiments, when the shapes of the accommodating portions 211 are different, the accommodating portions 211 have different inner wall surfaces. Exemplarily, when the accommodating portion 211 is a spherical groove, the inner wall surface of the accommodating portion 211 is a spherical wall surface. When the accommodating portion 211 is a cylindrical groove, the accommodating portion 211 has a plurality of connected inner wall surfaces.

In some embodiments, this embodiment is described by taking the accommodating portion 211 as a columnar groove as an example, and the cross-sectional shape of the accommodating portion 211 is a rectangle. At this time, the accommodating portion 211 has four side walls and a bottom. Wall 2111. Then, the concavo-convex structure can be distributed on the four side wall surfaces and the bottom wall surface 2111 at the same time, or be separately provided on the four side wall surfaces (as shown in FIG. 4 and FIG. 5 ), or be provided separately on one of the accommodating portions 211 on the side wall (as shown in Figure 7).

In some embodiments, the concave-convex structure may be a hole-like structure formed by depressions on the inner wall of the accommodating portion 211 , and there are multiple hole-like structures.

In some embodiments, the concave-convex structure includes a plurality of protrusions 212 , and the plurality of protrusions 212 are arranged at intervals and protrude from the inner wall of the accommodating portion 211 . The shape of the protruding part 212 can be a cylindrical protrusion, a cylindrical protrusion or a combination of various shapes, and the structure is simple and easy to form.

In some embodiments, please refer to FIG. 4 and FIG. 5 , a plurality of protrusions 212 are distributed on the circumferential side wall of the accommodating portion 211 , or, please refer to FIG. 7 , a plurality of protrusions 212 are distributed on the accommodating One of the side walls in the circumferential direction of the portion 211.

In some embodiments, the accommodating portion 211 includes a plurality of cavities, which communicate with each other, and the volumes of the cavities are different.

Wherein, the number of cavities can be set according to a preset sound frequency range, and multiple cavities can be arranged in a certain direction or in a circular arrangement along a circumferential direction, which is not limited in this embodiment.

Please refer to Fig. 6 and Fig. 7, this embodiment is described by taking the accommodating part 211 including two cavities as an example, the two cavities are respectively the first cavity 213 and the second cavity 214, at this time, the actuator 10 It may be disposed in the first cavity 213 or the second cavity 214 .

When the accommodating portion 211 is a cylindrical groove, the depth of the first cavity 213 is the same as that of the second cavity 214, and the cavity volume of the first cavity 213 is different from that of the second cavity 214, It is shown that the cross-sectional area of the first cavity 213 and the cross-sectional area of the second cavity 214 are different.

Of course, when the accommodating portion 211 has other shapes, the first cavity 213 and the second cavity 214 may also have other separation methods.

In this way, the first cavity 213 and the second cavity 214 can have different resonant frequencies, and when the exciter 10 drives the second housing 23 to vibrate, the first cavity 213 and the second cavity 214 can excite different frequencies respectively. Sound waves, the resonant frequency range of sound waves is wide, and a larger sound pressure level can be obtained in a wider frequency range.

In some embodiments, the center of the actuator 10 and the center of the accommodating portion 211 are spaced apart in a direction parallel to the second housing 23 . In this way, on the one hand, the sound emitted by the second casing 23 can have more resonant modes, the resonant frequency range of the sound emitted by the second casing 23 is wider, and the sound emitted by the second casing 23 can be in a wider range. A higher sound pressure level is obtained in the frequency range. On the other hand, it can also prevent the sound emitted by the second casing 23 from generating regular standing waves and reduce sound wave distortion.

In some embodiments, the setting position of the exciter 10 can be determined through modal analysis, which is not limited in this embodiment.

In some embodiments, according to different materials of the second shell 23 , the second shell 23 may have different thicknesses. For example, please refer to FIG. 2 , when the second casing 23 is made of steel, the thickness is usually 0.5mm-1mm, please refer to FIG. 3 , when the second casing 23 is made of glass, the thickness is 2mm-4mm.

It can be understood that when the thickness of the second shell 23 is small, its rigidity is small, and the second shell 23 is easily deformed. In some embodiments, a reinforcing plate 30 is provided on the part of the second housing 23 corresponding to the accommodating portion 211, the exciter 10 is connected to the reinforcing plate 30, and the damping of the reinforcing plate 30 is greater than that of the second housing 23. .

The thickness of the reinforcing plate 30 may be less than 3 mm, for example, the thickness of the reinforcing plate 30 in this embodiment may be 2 mm. The reinforcing plate 30 may be bonded and fixed to the second housing 23 by an adhesive member.

In this way, the rigidity of the second casing 23 can be improved by providing the reinforcing plate 30 , and excessive deformation of the second casing 23 can be avoided. It can be understood that when the thickness of the second shell 23 is small, the damping of the second shell 23 is small and the hardness is high. In this way, the resonant sound of the second shell 23 tends to produce obvious peaks and valleys, and the sound feels sharp. The damping of the portion of the second casing 23 corresponding to the accommodating portion 211 is improved by providing the reinforcing plate 30 with relatively large damping, which can expand the frequency range of the sound emitted by the second casing 23 and improve the sense of hearing.

Those skilled in the art are well aware that the sound quality of a sound can be measured from aspects such as volume, pitch, and timbre. Among them, the sound emitted by the sandwich panel has higher amplitude and wider frequency range than the sound emitted by the steel plate and glass plate, that is to say, the sound emitted by the sandwich panel is higher than that emitted by the steel plate or glass plate Has better sound quality.

It can be understood that the exciter 10 has a magnetic component, and after the reinforcing plate 30 is provided, the distance between the exciter 10 and the second housing 23 becomes larger. In this way, when the material of the second housing 23 is magnetic metal such as iron, the magnetic adsorption force between the second housing 23 and the actuator 10 can be weakened, and the magnetic force between the second housing 23 and the actuator 10 can be avoided. The suction force affects the vibration of the actuator 10 .

Considering that the part of the second casing 23 corresponding to the opening of the accommodating part 211 can vibrate with the reinforcing plate 30, while the part of the second casing 23 connected with the heat insulating layer 21 is fixed, the reinforcing plate 30 can be set At the middle position of the opening of the accommodating portion 211 .

In some embodiments, there is an avoidance gap L between the edge of the reinforcing plate 30 and the edge of the opening of the accommodating portion 211 , and the avoiding gap L is arranged along the circumferential direction of the reinforcing plate 30 . Exemplarily, the width of the avoidance gap L may be 5mm-15mm.

In some embodiments, along the circumferential direction of the reinforcing plate 30 , the widths of the avoidance gaps L at various positions may be the same or different. For example, referring to FIG. 4 , FIG. 5 and FIG. 7 , when the concave-convex structure is provided on the side wall of the accommodating portion 211 , the width of the avoidance gap L will increase or decrease correspondingly with the concave-convex structure.

Compared with the setting method in which the reinforcing plate 30 is attached to the inner wall surface of the accommodating part 211, the width of the avoidance gap L in the embodiment of the present application is relatively large, and the part of the second housing 23 corresponding to the avoidance gap L can constitute a transition area. And it vibrates with the reinforcing plate 30 to prevent the second housing 23 from being broken due to a large shearing force, and the service life of the second housing 23 is relatively high.

In some embodiments, the reinforcement board 30 is any one of honeycomb sandwich board, foam sandwich board, wood sandwich board and acrylic board, which is low in cost and easy to obtain.

Wherein, the honeycomb sandwich panel can be aluminum honeycomb sandwich panel, aramid fiber honeycomb sandwich panel, etc., and the foam sandwich panel can be polyvinyl chloride (Polyvinyl chloride, PVC) foam sandwich panel, polymethacrylimide ( PMI) foam sandwich panels, etc., wood sandwich panels can be balsa wood and other light wood.

When the reinforcing plate 30 is a sandwich panel, it includes a core layer and protective layers attached to both sides of the core layer. The material of the two outer protective layers can be glass fiber cloth, carbon fiber cloth, paper, plastic, etc. The reinforcing plate 30 can increase the rigidity and strength of the second housing 23, improve the damping of the second housing and thus improve the sound quality.

Fig. 8 is a structural schematic diagram 1 when the exciter in Fig. 1 is an electromagnetic exciter. Fig. 9 is the second structural diagram when the exciter in Fig. 1 is an electromagnetic exciter. Fig. 10 is a structural schematic diagram III when the exciter in Fig. 1 is an electromagnetic exciter.

Please refer to FIG. 1 to FIG. 3 and FIG. 8 to FIG. 10. In some embodiments, please refer to FIG. 2, FIG. 3 and FIG. The plane parallel to the body 23 may also be a plane disposed at an angle with the second housing 23 , so that the accommodating portion 211 has a larger accommodating space. Considering that the shape of the actuator 10 is relatively irregular, in some embodiments, please refer to FIG. 9 and FIG. The vertical dimensions along the second casing 23 are different, and the bottom wall surface 2111 of the accommodating portion 211 can protrude toward the side of the second casing 23 accordingly. The larger the thickness, the better the thermal insulation effect of the thermal insulation layer 21.

In some embodiments, the exciter 10 can be fixedly connected to the second housing 23. At this time, there is a gap between the exciter 10 and the bottom wall 2111, so as to avoid the vibration between the exciter 10 and the insulation layer 21 during the vibration of the exciter 10. In the event of a collision, the gap value can be 2mm-5mm. In some embodiments, the actuator 10 can also be fixedly connected with the insulation layer 21 .

In some embodiments, the actuator 10 is any one of the electromagnetic actuator 11 , the magnetostrictive actuator and the piezoelectric actuator, which has high applicability.

In some embodiments, when the actuator 10 is an electromagnetic actuator 11 , the actuator 10 is connected to the second housing 23 , and the actuator 10 is spaced from the bottom wall 2111 of the accommodating portion 211 . In this way, the vibration mass of the exciter 10 itself can drive the second housing 23 to vibrate, the amplitude of the second housing 23 is relatively large, and the sound pressure level of the sound emitted by the second housing 23 is relatively high.

At the same time, the weight of the electromagnetic actuator 11 is greater than the weight of the portion of the second housing 23 corresponding to the opening of the accommodating portion 211 . In this way, when the electromagnetic exciter 11 is fixedly connected with the second casing 23 as a whole, it is equivalent to increasing the equivalent vibration mass of the second casing 23, thus helping the second casing 23 to excite low-frequency sounds, satisfying Low-frequency sound design requirements for sound-generating equipment.

FIG. 11 is a structural schematic diagram 1 when the electromagnetic exciter in FIG. 10 drives the second housing to vibrate. FIG. 12 is a second structural diagram when the electromagnetic exciter in FIG. 10 drives the second housing to vibrate. Fig. 13 is a structural schematic diagram IV when the exciter in Fig. 1 is an electromagnetic exciter. Fig. 14 is a schematic diagram of the fifth structure when the exciter in Fig. 1 is an electromagnetic exciter.

Please refer to FIG. 11 to FIG. 14 , in some embodiments, the electromagnetic actuator 11 includes a voice coil 111 , a first magnetic member and a magnetic conduction member 112 , and the voice coil 111 and the magnetic conduction member 112 are respectively fixedly connected to the second housing 23 , the magnetically conductive part 112 can move relative to the voice coil 111 in the magnetic field generated by the first magnetic part, and drive the second casing 23 to vibrate and produce sound.

The magnetically conductive member 112 may be a U-iron or a T-iron well known to those skilled in the art. The voice coil 111 and the magnetically conductive member 112 can be bonded and fixed to the second housing 23 through adhesives respectively, so that the connection stability is high, and collision between the voice coil 111 and the second housing 23 can be avoided.

In some embodiments, when the reinforcement board 30 is disposed in the second housing 23 , both the voice coil 111 and the magnetic guide 112 are fixedly connected with the reinforcement board 30 .

Considering that the voice coil 111 will generate heat when the electromagnetic exciter 11 is working, in order to help the voice coil 111 dissipate heat, please refer to FIG. 13 . , a heat conduction element 113 is arranged in the through hole, and the heat conduction element 113 is fixedly connected with the reinforcing plate 30 and mounted on the second casing 23 . When the exciter 10 is fixed on the reinforcing plate 30 , the voice coil 111 is fixedly connected with the heat conducting member 113 . Wherein, the material of the heat conducting member 113 may be metal or the like.

In this way, the heat generated by the voice coil 111 can be transferred to the heat conducting element 113 , and then transferred to the second housing 23 through the heat conducting element 113 . And because the second housing 23 is in contact with the outside air, the second housing 23 can exchange heat with the air and reduce the temperature, so as to realize the cooling of the voice coil 111 .

In some embodiments, in order to help the voice coil 111 to cool down, the material of the second housing 23 can be metal, so as to increase the heat exchange speed between the heat conducting element 113 and the second housing 23 .

In some embodiments, in order to help the voice coil 111 dissipate heat, please refer to FIG. 14 , the length of the voice coil 111 can also be increased, and the voice coil 111 passes through the through hole of the reinforcing plate 30 and is fixedly connected with the second housing 23, so that , the voice coil 111 can directly exchange heat with the second casing 23, and the heat exchange speed is relatively high.

In some embodiments, the actuator 10 is a magnetostrictive actuator. When the actuator 10 is fixedly connected to the insulation layer 21, the fixing stability of the actuator 10 is relatively high, and by fixing the magnetostrictive actuator on the insulation layer 21, it is possible to avoid reducing the thermal insulation effect due to the excessively large depth of the accommodating portion 211 resulting in a small thickness of the thermal insulation layer 21.

In some embodiments, the magnetostrictive actuator includes: a second magnetic member; a coil for generating an alternating magnetic field according to a control signal; The telescopic deformation occurs along the axial direction of the coil; the telescopic member is connected with the second casing 23 to drive the second casing 23 to move back and forth; wherein, the reciprocating movement direction of the second casing 23 is set at an included angle with the axial direction of the coil.

Wherein, the coil is cylindrical, and the second magnetic part and the telescopic part can be arranged in the coil. And in order to facilitate the relative movement between the telescopic part and the coil, there is an assembly gap between the coil and the telescopic part.

In some embodiments, there may be multiple second magnetic elements and telescopic elements as required, and they are arranged in sequence along the axial direction of the coil. The magnetostrictive actuator also includes an actuator housing, which is fixedly connected to the insulation layer 21, and the coil is accommodated in the actuator housing to protect the coil, the second magnetic element and the telescopic element. The exciter casing can be made of magnetically permeable material, such as iron, steel, and the like.

The coil is connected with external power supply, amplifier and other components to receive the control signal and generate an alternating magnetic field according to the control signal. The second magnetic part can be a permanent magnet, etc., the magnetic field generated by the second magnetic part can be called a static magnetic field, and the material of the stretchable part can be a giant magnetostrictive material well known to those skilled in the art. The coil, the second magnetic element, and the telescopic element can all be types well known to those skilled in the art, and this embodiment does not limit it.

Among them, the static magnetic field is used to provide a static working point for the telescopic parts, and the alternating magnetic field provides a dynamic working space for the telescopic parts. Sexual elongation or shortening, thereby driving the second housing 23 to vibrate.

Since the reciprocating movement direction of the second casing 23 is set at an included angle with the axial direction of the coil, the axis of the coil is not perpendicular to the second casing 23 , for example, the axis of the coil is parallel to the second casing 23 . In this way, the external dimension of the exciter 10 along the reciprocating movement direction of the second housing 23 is approximately the radial dimension of the exciter 10 along the coil, and the external dimension of the exciter 10 along the coil radial direction is much smaller than that of the exciter 10 along the coil axial direction. In this way, when the thickness of the refrigerator along the reciprocating movement direction of the second housing 23 is constant, the insulation layer 21 can obtain the maximum thickness.

Each embodiment or implementation manner in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean that the embodiments are combined A specific feature, structure, material, or characteristic described or exemplified is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.