CN220981661U - Refrigerator with a refrigerator body - Google Patents

Abstract

The embodiment of the application belongs to the household appliance technology, and provides a refrigerator, which comprises: the box body is provided with a cold source chamber and a storage chamber which are communicated with each other; the evaporator is positioned in the cold source cavity; the fan, it is located cold source cavity, and the fan includes: the back plate is connected with the box body, and is rotationally connected with the back plate; the phonon crystal unit cells are arranged on the fan body, are arranged in an array, and comprise: an elastic member; a rigid member; the elastic piece is inserted on the rigid piece, and the rigid piece is provided with an acoustic black hole structure. The refrigerator provided by the application has low noise and can improve user experience.

Description

Refrigerator with a refrigerator body

Technical Field

The embodiment of the application relates to the technical field of household appliances, in particular to a refrigerator.

Background

With the continuous development of science and technology, the living standard of people is continuously improved, and more families purchase refrigerators to keep foods to be stored fresh.

In the related art, a refrigerator includes a case having a cold source chamber and a storage chamber which are communicated with each other, a fan disposed in the cold source chamber so as to deliver cold air near the evaporator in the cold source chamber into the storage chamber.

When the fan operates, larger noise can be outwards transmitted, and user experience is affected.

Disclosure of utility model

The embodiment of the application provides a refrigerator, which has low noise and can improve user experience.

In a first aspect, an embodiment of the present application provides a refrigerator, including:

the box body is provided with a cold source chamber and a storage chamber which are communicated with each other;

the evaporator is positioned in the cold source cavity;

The fan, it is located cold source cavity, and the fan includes:

A back plate connected with the box body

The fan body is rotationally connected with the back plate;

The phonon crystal unit cells are arranged on the fan body, are arranged in an array, and comprise:

The elastic piece is connected with the fan body;

and the rigid piece is inserted on the elastic piece and is provided with an acoustic black hole structure.

Therefore, when the fan is required to convey cold air around the evaporator from the cold source chamber to the storage chamber, the fan body and the phonon crystal unit cells synchronously rotate, a plurality of phonon crystal unit cells which are arranged in an array form band gaps, a forbidden band is formed, and vibration in the forbidden band frequency range can be prevented from passing through. Because the acoustic black hole structure is arranged on the rigid body of the phonon crystal unit cell, the deformation of the phonon crystal unit cell can be reduced through the characteristic of energy convergence of the acoustic black hole structure, and a richer resonance mode can be realized by affecting the equivalent rigidity of the phonon crystal unit cell. Therefore, the vibration reduction effect is good.

In some embodiments of the present application, the plurality of phonon crystal unit cells are distributed at intervals along the radial direction of the fan body and are distributed at intervals around the circumferential direction of the fan body.

Therefore, the number of phonon crystal unit cells is large, and the vibration reduction effect is good.

In some embodiments of the present application, the rigid member includes a plurality of interconnected rigid member bodies arranged in an array, each rigid member body having an acoustic black hole structure.

Therefore, the acoustic black hole structure is more in number, and the vibration reduction effect is better.

In some embodiments of the application, the rigid member body is a self-similar fractal structure.

Therefore, the fractal order can be selected according to the product requirement, so that the band gaps of a plurality of phonon crystal single cells arranged in an array can meet the requirement.

In some embodiments of the present application, when the rigid member body is a first-order self-similar fractal structure, the rigid member body includes a first connection structure, a second connection structure, and a third connection structure;

The first connecting structures of the rigid part bodies are connected with each other along the first side of the extending direction, the second connecting structures are connected with the second side of the first connecting structures along the extending direction, and the third connecting structures are connected with one side of the second connecting structures, which is away from the first connecting structures along the extending direction;

And the first connecting structure, the second connecting structure and the third connecting structure are provided with acoustic black hole structures.

Therefore, the acoustic black hole structure arranged on the rigid part body is more, and the vibration reduction effect is better.

In some embodiments of the application, the second connection structure includes a first connection portion and a second connection portion;

The first connecting part and the second connecting part are connected with the second side of the first connecting structure along the extending direction, are positioned on the same side of the first connecting structure and have a distance along the axial direction of the fan body;

The third connecting structure is connected with one side of the second connecting part, which is away from the first connecting structure, along the extending direction;

The first connecting structure has a first acoustic black hole structure, the first connecting portion has a second acoustic black hole structure, the second connecting portion has a third acoustic black hole structure, and the third connecting structure has a fourth acoustic black hole structure.

Therefore, the acoustic black hole structure arranged on the rigid part body is more, and the vibration reduction effect is better.

In some embodiments of the present application, the extending direction of the first connecting portion is perpendicular to the extending direction of the first connecting structure, the extending direction of the second connecting portion is parallel to the extending direction of the first connecting portion, and the front projection of the second connecting portion towards the back of the fan body coincides with the front projection of the first connecting portion towards the back of the fan body;

The extending direction of the third connecting structure is perpendicular to the extending direction of the second connecting part and parallel to the extending direction of the first connecting structure, and the third connecting structure is close to the first side of the first connecting structure along the extending direction.

Thus, the whole structure of the rigid part body is compact, and the occupied space is small.

In some embodiments of the present application, the first acoustic black hole structure is a two-dimensional acoustic black hole structure, the second acoustic black hole structure is a one-dimensional acoustic black hole structure, the third acoustic black hole structure is a one-dimensional acoustic black hole structure, and the fourth acoustic black hole structure is a one-dimensional acoustic black hole structure.

In this way, the processing of the rigid member body is facilitated.

In some embodiments of the application, the number of rigid member bodies is four, including a first rigid body, a second rigid body, a third rigid body, and a fourth rigid body;

The first rigid body is overlapped with the second rigid body after rotating 90 degrees towards the second rigid body;

The second rigid body is overlapped with the third rigid body after rotating 90 degrees towards the third rigid body;

The third rigid body is overlapped with the fourth rigid body after rotating for 90 degrees towards the fourth rigid body;

the fourth rigid body is overlapped with the first rigid body after rotating 90 degrees towards the first rigid body.

Thus, the whole structure of the rigid piece is compact, and the occupied space is small.

In a second aspect, an embodiment of the present application provides a refrigerator, including: box and fan, the fan is located the box, and the fan includes: the backboard is positioned in the box body and is connected with the box body;

The fan body is rotationally connected with the back plate;

The phonon crystal unit cells are arranged on the fan body, are arranged in an array, and comprise:

The elastic piece is connected with the fan body;

and the rigid piece is inserted on the elastic piece and is provided with an acoustic black hole structure.

Therefore, when the fan is required to convey cold air around the evaporator from the cold source chamber to the storage chamber or when the fan is required to cool the refrigerant in the condenser, the fan body and the phonon crystal unit cells synchronously rotate, a plurality of phonon crystal unit cells which are arranged in an array form band gaps, a forbidden band is formed, and vibration in the forbidden band frequency range can be prevented from passing through. Because the acoustic black hole structure is arranged on the rigid body of the phonon crystal unit cell, the deformation of the phonon crystal unit cell can be reduced through the characteristic of energy convergence of the acoustic black hole structure, and a richer resonance mode can be realized by affecting the equivalent rigidity of the phonon crystal unit cell. Therefore, the vibration reduction effect is good.

Drawings

In order to more clearly illustrate the embodiments of the present application or the implementation of the related art, the drawings that are required for the embodiments or the related art description will be briefly described, and it is apparent that the drawings in the following description are some embodiments of the present application and that other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

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

fig. 2 is a schematic structural diagram of a fan in a refrigerator according to an embodiment of the present application;

FIG. 3 is an exploded view of a fan in a refrigerator according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a fan body and phonon crystal unit cells in a refrigerator according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a phonon crystal unit cell in a refrigerator according to an embodiment of the present application;

FIG. 6 is an exploded view of phonon crystal unit cell in a refrigerator according to an embodiment of the present application;

fig. 7 is a schematic structural view of a rigid member in a refrigerator according to an embodiment of the present application;

FIG. 8 is a top view of the rigid member of FIG. 7;

fig. 9 is a schematic structural view of a rigid member body in a refrigerator according to an embodiment of the present application;

FIG. 10 is a front view of the rigid member body of FIG. 9;

FIG. 11 is a left side view of the rigid member body of FIG. 9;

FIG. 12 is a right side view of the rigid member body of FIG. 9;

FIG. 13 is a top view of the stiffener body of FIG. 9;

FIG. 14 is a cross-sectional view taken along the line A-A in FIG. 13;

fig. 15 is a sectional view taken along the direction B-B in fig. 13.

Reference numerals illustrate:

100-box body;

200-door body;

300-fans; 310-backboard; 320-fan body; 330-phononic crystal unit cell; 331-an elastic member; 332-a rigid member; 3321—a rigid member body; 3321 a-first connection structure; 3321 b-second connection structure; 3321 c-third linking structure; 3321d—first connection portion; 3321 e-second connection; 333-acoustic black hole structure; 3331-first acoustic black hole structure; 3332-a second acoustic black hole structure; 3333-third acoustic black hole structure; 3334-fourth acoustic black hole structure.

Detailed Description

The refrigerator comprises a refrigerator body, a fan and an evaporator, wherein the refrigerator body is provided with a cold source cavity and a storage chamber which are mutually communicated, and the fan is arranged in the cold source cavity so as to convey cold air near the evaporator in the cold source cavity into the storage chamber. Moreover, the cabinet of the refrigerator has a cabinet in which the compressor, the bottom air cooler and the condenser are all disposed in some refrigerators. The fan comprises a fan body and a back plate, wherein the back plate is connected with the box body, and the fan body is rotationally connected with the back plate.

The fan can outwards propagate larger noise when in operation, and user experience is affected. The inventor researches and discovers that the fan lacks a vibration reduction structure.

Therefore, in the refrigerator provided by the utility model, the fan is designed by adopting the design principle of local resonance phonon crystals. The local resonance phonon crystal is a novel periodic synthetic material, can be used for controlling the propagation of elastic waves and sound waves, generates a complete band gap with the lattice size far smaller than the wavelength of the sound waves in the local resonance phonon crystal, and realizes the control of the small-size phonon crystal structure on the sound waves with large wavelength. That is, the fan is provided with the plurality of phonon crystal unit cells, the plurality of phonon crystal unit cells are arranged in an array, vibration generated by rotation of the fan is transmitted to the position of the phonon crystal unit cell, and the phonon crystal unit cell resonates to dissipate vibration energy, so that dissipation of vibration energy with specific frequency can be realized.

Furthermore, the phononic crystal unit cell comprises an elastic piece and a rigid piece, when the fan operates, vibration is transmitted to the phononic crystal unit cell, and the rigid body and the elastic body resonate to dissipate vibration energy and help the fan to damp vibration. That is, the rigid body and the elastic body can be understood as a mass block and a spring, and when vibration is transmitted to the mass block, the mass block vibrates, so that vibration energy of the whole structure is dissipated, and a vibration reduction effect on the fan is achieved.

Further, the rigid member has an acoustic black hole structure, which is a structure capable of manipulating bending wave propagation by changing the geometric parameters of the wedge-shaped structure. In an absolute ideal case, the bending wave velocity gradually decreases to zero in the acoustic black hole region. After the vibration of the fan is transmitted to the acoustic black hole structure, a large amount of vibration energy is gathered at the lowest cross-sectional area of the acoustic black hole structure, and vibration reduction materials are arranged at the lowest cross-sectional area, so that the vibration energy can be dissipated.

Therefore, the phononic crystal unit cell is provided with an acoustic black hole structure, and the effect of the acoustic black hole can be overlapped in the phononic crystal, so that the effect of the phononic crystal array is enhanced, the richness of resonance modes is realized, and the effect is achieved at lower frequency and high frequency. The main objective of the current vibration noise is to reduce the frequency of noise reduction and vibration reduction. Therefore, the fan in the refrigerator provided by the utility model has low noise and can improve user experience.

For the purposes of making the objects, embodiments and advantages of the present application more apparent, an exemplary embodiment of the present application will be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the application are shown, it being understood that the exemplary embodiments described are merely some, but not all, of the examples of the application.

It should be noted that the brief description of the terminology in the present application is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1 and 2, the present embodiment provides a refrigerator including a cabinet 100, a door 200, a blower 300, and a refrigerating system.

Illustratively, the case 100 includes a housing and a liner disposed within the housing, the liner configured to communicate the cold source chamber and the storage chamber with each other. The back of the inner container and the outer shell form an organic bin. Wherein, the storing room can be at least one, and when the quantity of storing rooms is one, the storing room can be any one of a refrigerating room, a freezing room or a temperature changing room. When the number of storage compartments is two or more, the plurality of storage compartments may include at least one or more of a refrigerating compartment, a freezing compartment, or a temperature changing compartment.

The cold source chamber is communicated with the storage chamber through an air duct, the fan 300 is arranged in the cold source chamber, and when the fan 300 works, air in the cold source chamber and the storage chamber circularly flows. In the implementation mode that the storage chambers are multiple, the air channels can also be multiple, and each storage chamber is communicated with the cold source chamber through the corresponding air channel.

The openable cover of the door 200 is disposed on the front side of the case 100 to close and open the storage chamber, and take and put articles in the storage chamber. It should be noted that the number of the door bodies 200 may be one, two or more.

The refrigerating system can comprise a compressor, a condenser, a throttling device and an evaporator, wherein the compressor, the condenser, the throttling device and the evaporator are sequentially connected in series through pipelines, and refrigerant flows in the pipelines. The compressor and the condenser can be arranged in the machine cabin, and the evaporator is arranged in the cold source cavity.

It should be noted that, in some embodiments, a fan 300 may be disposed in the cabin, and the fan 300 in the cabin is used to dissipate heat of the refrigerant in the condenser.

When the compressor works, low-temperature and low-pressure refrigerant is sucked by the compressor, compressed into high-temperature and high-pressure superheated gas in the compressor cylinder and discharged to the condenser. The high-temperature and high-pressure refrigerant gas is radiated by the condenser, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated vapor, the saturated vapor is further cooled into saturated liquid, and the pressure of the refrigerant is almost unchanged in the whole condensation process. The throttling device can comprise a decompression tube or an electronic expansion valve, and the throttling device is described by taking the decompression tube as an example, and the decompression tube is low in cost and not prone to abnormal faults. The condensed refrigerant saturated liquid is throttled and depressurized through a decompression tube, and the refrigerant becomes normal-temperature and low-pressure wet vapor. After that, the wet vapor at normal temperature and low pressure absorbs heat by the evaporator and evaporates, thereby not only lowering the temperature of the evaporator and its surroundings, but also changing the refrigerant into a low-temperature and low-pressure gas. The evaporator refrigerates the air in the cold source chamber to reduce the temperature of the air in the cold source chamber, and the cold air in the cold source chamber flows into the storage chamber through the air duct under the action of the fan 300 to reduce the temperature of the storage chamber. The refrigerant from the evaporator returns to the compressor again, and the above process is repeated, so that the evaporator can continuously refrigerate the air in the cold source chamber, and the storage chamber can be maintained at a set temperature.

Further, the refrigeration system may further include a dry filter connected between the condenser and the throttling device through a pipe, and the dry filter may remove moisture and impurities from the refrigerant.

Referring to fig. 3 to 6, in the present embodiment, a blower 300 includes: a back plate 310, a fan body 320, and a plurality of phononic crystal unit cells 330.

Wherein the back plate 310 is connected with the case 100. Illustratively, the back plate 310 may be connected with an air duct of a refrigerator. The fan body 320 is rotatably connected with the back plate 310. The plurality of phonon crystal unit cells 330 are disposed on the blower body 320, and the plurality of phonon crystal unit cells 330 are arranged in an array. The phononic crystal unit 330 may be disposed on a side of the blower body 320 facing the back plate 310.

When the blower 300 works, the blower body 320 and the phononic crystal unit 330 synchronously rotate relative to the back plate 310.

It will be appreciated that the plurality of photonic crystal unit cells 330 arranged in an array can form a band gap to form a forbidden band, and vibration in the forbidden band frequency range can be prevented from passing. The corresponding frequency of the phonon crystal unit 330 under the corresponding bloch wave vector k can be calculated, wherein a certain frequency band does not enter any dispersion curve, and the frequency band is a band gap. The plurality of photonic crystal unit cells 330 arranged in an array can effectively inhibit the propagation of all elastic waves in the band gap frequency range, and the plurality of photonic crystal unit cells 330 arranged in an array can realize the full inhibition of sound waves in a certain frequency band.

Specifically, referring to fig. 5 to 8, the phononic crystal unit cell 330 includes: an elastic member 331 and a rigid member 332. The elastic member 331 is connected to the fan body 320, and the rigid member 332 is inserted into the elastic member 331. Illustratively, one end of the elastic member 331 is connected to the blower body 320, and the rigid member 332 is inserted on the elastic member 331 with a distance from the blower body 320 in the axial direction.

Wherein the rigid member 332 has an acoustic black hole structure 333.

It will be appreciated that when the blower 300 is in operation, vibrations are transferred to the phononic crystal unit 330, and the rigid body and the elastic body resonate, dissipating the vibrational energy, and helping to dampen the vibrations of the blower 300. Moreover, after the vibration of the blower 300 is transferred to the acoustic black hole structure 333, a large amount of vibration energy is concentrated at the lowest cross-sectional area of the acoustic black hole structure 333, and the vibration damping material is disposed at the lowest cross-sectional area, so that the vibration energy can be dissipated.

When the acoustic black hole structure 333 and the phonon crystal unit 330 are separately arranged, the phonon crystal unit 330 arranged in an array is effective in a low-frequency region, and the acoustic black hole has a simplified structure because of unrealizability (the cross-sectional area is necessarily infinitely close to 0), and the simplified acoustic black hole has a small effect on the low-frequency region. In the embodiment, the acoustic black hole structure 333 is disposed on the rigid body of the phonon crystal unit 330, so that the deformation of the phonon crystal unit 330 can be reduced by the characteristic of energy converging of the acoustic black hole structure 333, and a richer resonance mode can be realized by affecting the equivalent rigidity of the phonon crystal unit 330.

In some embodiments, referring to fig. 3 and 4, the blower body 320 is circular in shape, and the plurality of phononic crystal cells 330 are spaced apart along the radial direction of the blower body 320 and are spaced apart around the circumference of the blower body 320. Illustratively, the first turns in the radial direction are rotationally distributed at 45 ° intervals, the second turns are rotationally distributed at 30 ° intervals, the third turns are rotationally distributed at 15 ° intervals, and the fourth turns are rotationally distributed at 10 ° intervals.

It is understood that the phononic crystal unit 330 is more arranged, and the vibration reduction effect is better.

In other embodiments, the fan body 320 is rectangular in shape, and the plurality of phonon crystal cells 330 may be distributed at intervals along the length direction of the fan body 320 and at intervals along the width direction of the fan body 320.

Referring to fig. 6-8, in some embodiments of the application, the stiffener 332 includes a plurality of interconnected stiffener bodies 3321, the plurality of stiffener bodies 3321 being arranged in an array, each stiffener body 3321 having an acoustic black hole structure 333.

It will be appreciated that in this way, the number of acoustic black hole structures 333 provided is greater, so that the vibration damping effect can be improved.

In some embodiments of the application, the rigid member body 3321 is a self-similar fractal structure.

It should be noted that, the rigid member body 3321 is a self-similar fractal structure, and by using the fractal iteration characteristics thereof, the rigidity, vibration reduction and other inherent characteristics of the rigid member can be influenced, and as the fractal order increases, the low-frequency band gap characteristics of the plurality of photonic crystal unit cells 330 arranged in an array are enhanced, the band gap of the photonic crystal unit cells can be moved to a low frequency, the band gap characteristics between different fractal orders are different, and the fractal order can be selected according to the product requirement. Illustratively, when the rigid member body 3321 is of a first-order self-similar fractal structure, the band gap is 100-150Hz, and when the rigid member body 3321 is of a second-order self-similar fractal structure, the band gap is 50-100Hz, and the frequency at which the blower 300 vibrates greatly is 125Hz. A first order self-similar fractal structure is selected.

In this embodiment, the rigid member body 3321 may employ a Hilbert self-similar fractal structure.

Specifically, referring to fig. 9 to 12, when the rigid member body 3321 is a first-order self-similar fractal structure, the rigid member body 3321 includes a first connection structure 3321a, a second connection structure 3321b, and a third connection structure 3321c.

The first connection structure 3321a of each rigid member body 3321 is connected to each other along a first side of the extending direction, the second connection structure 3321b is connected to a second side of the first connection structure 3321a along the extending direction, and the third connection structure 3321c is connected to a side of the second connection structure 3321b away from the first connection structure 3321a along the extending direction.

Wherein the first connection structure 3321a, the second connection structure 3321b and the third connection structure 3321c are provided with an acoustic black hole structure 333.

In some embodiments of the present application, the second connection structure 3321b includes a first connection portion 3321d and a second connection portion 3321e.

The first connection portion 3321d and the second connection portion 3321e are connected to the second side of the first connection structure 3321a along the extending direction, and the first connection portion 3321d and the second connection portion 3321e are located on the same side of the first connection structure 3321a and have a distance along the axial direction of the fan body 320. The third connection structure 3321c is connected to a side of the second connection portion 3321e facing away from the first connection structure 3321a in the extending direction.

The first connection structure 3321a has a first acoustic black hole structure 3331, the first connection portion 3321d has a second acoustic black hole structure 3332, the second connection portion 3321e has a third acoustic black hole structure 3333, and the third connection structure 3321c has a fourth acoustic black hole structure 3334. Thus, the rigid member body 3321 has more acoustic black hole structures and better vibration reduction effect.

In some embodiments of the present application, the extending direction of the first connection portion 3321d is perpendicular to the extending direction of the first connection structure 3321a, the extending direction of the second connection portion 3321e is parallel to the extending direction of the first connection portion 3321d, and the front projection of the second connection portion 3321e towards the back surface of the fan body 320 coincides with the front projection of the first connection portion 3321d towards the back surface of the fan body 320. The extending direction of the third connecting structure 3321c is perpendicular to the extending direction of the second connecting portion 3321e and parallel to the extending direction of the first connecting structure 3321a, and the third connecting structure 3321c is located at one side of the third connecting structure 3321c near the first side of the first connecting structure 3321a along the extending direction. Thus, the overall structure of the rigid member body 3321 is compact and occupies less space.

Specifically, referring to fig. 14, the first acoustic black hole structure 3331 is a two-dimensional acoustic black hole structure.

The first acoustic black hole structure 3331 has a first curved surface, and a rotation boundary curve of the first curved surface is:

y＝ax^t a>0，t≥2；

illustratively, y=0.06 x ²

Because the structural sectional area change of the scheme is not the flatness of the prior art, but the vibration energy at the structural position is the vibration transmission cumulative effect from large to small in sectional area, the sectional area change is changed according to the vibration propagation rule and the power function curve designed by the acoustic black hole formula, and compared with the flatness of the prior art, the vibration damping device has better vibration damping effect. The smaller the cross-sectional area of the first acoustic black hole structure 3331, the better, and the smaller the minimum area of the cross-sectional area, since actual production cannot approach 0 infinitely.

The first acoustic black hole structure 3331 has a sharp change in cross-sectional area (near the origin in the figure), and is provided with a mounting groove, and vibration energy can be dissipated and vibration amplitude can be timely attenuated by arranging a vibration damper in the mounting groove. The material of the vibration damper can be cement or foam. It should be noted that, in the case of meeting the strength requirement, other positions of the first acoustic black hole structure 3331 may also increase the mounting slots, thereby increasing the number of vibration damping members.

Referring to fig. 10, the second acoustic black hole structure 3332 is a one-dimensional acoustic black hole structure.

The second acoustic black hole structure 3332 has a second curved surface, and a boundary curve of the second curved surface is:

y＝ax^t a>0，t＞2；

Illustratively, y=0.03 x ³

Because the structural sectional area change of the scheme is not the flatness of the prior art, but the vibration energy at the structural position is the vibration transmission cumulative effect from large to small in sectional area, the sectional area change is changed according to the vibration propagation rule and the power function curve designed by the acoustic black hole formula, and compared with the flatness of the prior art, the vibration damping device has better vibration damping effect. The smaller the cross-sectional area is, the better, and the smaller the minimum area of the cross-sectional area is, since actual production cannot approach 0 infinitely.

The position (one side close to the origin in the figure) with sharp change of the cross-sectional area is provided with the mounting groove, and the vibration damping piece is arranged in the mounting groove, so that vibration energy can be dissipated and vibration amplitude can be timely attenuated. The material of the vibration damper can be cement or foam. It should be noted that, in the case of meeting the strength requirement, other positions of the second acoustic black hole structure 3332 may also increase the mounting slots, thereby increasing the number of vibration damping members.

Referring to fig. 15, the third acoustic black hole structure 3333 is a one-dimensional acoustic black hole structure.

The third acoustic black hole structure 3333 has a third curved surface, and a boundary curve of the third curved surface is:

y＝ax^t a>0，t＞2；

Illustratively, y=0.03 x ⁴

Because the structural sectional area change of the scheme is not the flatness of the prior art, but the vibration energy at the structural position is the vibration transmission cumulative effect from large to small in sectional area, the sectional area change is changed according to the vibration propagation rule and the power function curve designed by the acoustic black hole formula, and compared with the flatness of the prior art, the vibration damping device has better vibration damping effect. The smaller the cross-sectional area is, the better, and the smaller the minimum area of the cross-sectional area is, since actual production cannot approach 0 infinitely.

The position (one side close to the origin in the figure) with sharp change of the cross-sectional area is provided with the mounting groove, and the vibration damping piece is arranged in the mounting groove, so that vibration energy can be dissipated and vibration amplitude can be timely attenuated. The material of the vibration damper can be cement or foam. It should be noted that, in the case of meeting the strength requirement, other positions of the third acoustic black hole structure 3333 may also increase the mounting slots, thereby increasing the number of vibration damping members.

Referring to fig. 12, the fourth acoustic black hole structure 3334 is a one-dimensional acoustic black hole structure.

The fourth acoustic black hole structure 3334 has a fourth curved surface, and a boundary curve of the fourth curved surface is:

y＝ax^t a>0，t＞2；

Illustratively, y=0.03 x ⁴

Because the structural sectional area change of the scheme is not the flatness of the prior art, but the vibration energy at the structural position is the vibration transmission cumulative effect from large to small in sectional area, the sectional area change is changed according to the vibration propagation rule and the power function curve designed by the acoustic black hole formula, and compared with the flatness of the prior art, the vibration damping device has better vibration damping effect. The smaller the cross-sectional area of the fourth acoustic black hole structure 3334, the better, and the smaller the minimum area of the cross-sectional area, since actual production cannot approach 0 infinitely.

The position (one side close to the origin in the figure) with sharp change of the cross-sectional area is provided with the mounting groove, and the vibration damping piece is arranged in the mounting groove, so that vibration energy can be dissipated and vibration amplitude can be timely attenuated. The material of the vibration damper can be cement or foam. It should be noted that, in the case of meeting the strength requirement, other positions of the fourth acoustic black hole structure 3334 may also increase the mounting slots, thereby increasing the number of vibration damping members.

In some embodiments of the application, referring to fig. 8, the number of rigid member bodies 3321 is four, including a first rigid body, a second rigid body, a third rigid body, and a fourth rigid body. The first rigid body rotates 90 degrees towards the second rigid body and then coincides with the second rigid body. The second rigid body is overlapped with the third rigid body after rotating 90 degrees towards the third rigid body. The third rigid body is overlapped with the fourth rigid body after rotating 90 degrees towards the fourth rigid body. The fourth rigid body is overlapped with the first rigid body after rotating 90 degrees towards the first rigid body. It will be appreciated that when the number of rigid member bodies 3321 is four, the overall structure of the rigid member is compact and occupies less space.

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

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. The illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. A refrigerator, comprising:

the box body is provided with a cold source chamber and a storage chamber which are communicated with each other;

The evaporator is positioned in the cold source cavity;

the fan, it is located in the cold source cavity, the fan includes:

A back plate connected with the box body

The fan body is rotationally connected with the back plate;

The phonon crystal unit cells are arranged on the fan body, the phonon crystal unit cells are arranged in an array, and the phonon crystal unit cells comprise:

the elastic piece is connected with the fan body;

And the rigid piece is inserted on the elastic piece and is provided with an acoustic black hole structure.

2. The refrigerator of claim 1, wherein a plurality of the phononic crystal unit cells are spaced apart along a radial direction of the blower body and are spaced apart around a circumferential direction of the blower body.

3. The refrigerator of claim 1, wherein the rigid member comprises a plurality of interconnected rigid member bodies, the plurality of rigid member bodies being arranged in an array, each of the rigid member bodies having the acoustic black hole structure.

4. The refrigerator of claim 3, wherein the rigid member body is a self-similar fractal structure.

5. The refrigerator of claim 4, wherein when the rigid member body is a first-order self-similar fractal structure, the rigid member body includes a first connection structure, a second connection structure, and a third connection structure;

The first connecting structures of the rigid part bodies are connected with each other along a first side of the extending direction, the second connecting structures are connected with a second side of the first connecting structures along the extending direction, and the third connecting structures are connected with one side of the second connecting structures away from the first connecting structures along the extending direction;

The first connecting structure, the second connecting structure and the third connecting structure are provided with the acoustic black hole structure.

6. The refrigerator of claim 5, wherein the second connection structure includes a first connection portion and a second connection portion;

The first connecting part and the second connecting part are connected with the second side of the first connecting structure along the extending direction, and the first connecting part and the second connecting part are positioned on the same side of the first connecting structure and have a distance along the axial direction of the fan body;

the third connecting structure is connected with one side of the second connecting part, which is away from the first connecting structure along the extending direction;

The first connection structure has a first acoustic black hole structure, the first connection portion has a second acoustic black hole structure, the second connection portion has a third acoustic black hole structure, and the third connection structure has a fourth acoustic black hole structure.

7. The refrigerator of claim 6, wherein the extending direction of the first connecting portion is perpendicular to the extending direction of the first connecting structure, the extending direction of the second connecting portion is parallel to the extending direction of the first connecting portion, and an orthographic projection of the second connecting portion toward the rear surface of the blower body coincides with an orthographic projection of the first connecting portion toward the rear surface of the blower body;

The extending direction of the third connecting structure is perpendicular to the extending direction of the second connecting portion and parallel to the extending direction of the first connecting structure, and the third connecting structure is close to the first side of the first connecting structure along the extending direction.

8. The refrigerator of claim 7, wherein the first acoustic black hole structure is a two-dimensional acoustic black hole structure, the second acoustic black hole structure is a one-dimensional acoustic black hole structure, the third acoustic black hole structure is a one-dimensional acoustic black hole structure, and the fourth acoustic black hole structure is a one-dimensional acoustic black hole structure.

9. The refrigerator according to any one of claims 3 to 8, wherein the number of rigid member bodies is four, including a first rigid body, a second rigid body, a third rigid body, and a fourth rigid body;

the first rigid body is overlapped with the second rigid body after rotating for 90 degrees towards the second rigid body;

The second rigid body is overlapped with the third rigid body after rotating for 90 degrees towards the third rigid body;

The third rigid body is overlapped with the fourth rigid body after rotating for 90 degrees towards the fourth rigid body;

the fourth rigid body is overlapped with the first rigid body after rotating for 90 degrees towards the first rigid body.

10. A refrigerator, comprising: the box and fan, the fan is located in the box, the fan includes: the backboard is positioned in the box body and is connected with the box body;

the fan body is rotationally connected with the back plate;

The phonon crystal unit cells are arranged on the fan body, the phonon crystal unit cells are arranged in an array, and the phonon crystal unit cells comprise:

the elastic piece is connected with the fan body;

And the rigid piece is inserted on the elastic piece and is provided with an acoustic black hole structure.