CN112289293A - Embedded noise reduction device and refrigerator - Google Patents

Abstract

The present application relates to the technical field of home appliances, and discloses an embedded noise reduction device, comprising: a housing with a accommodating cavity formed inside; and two or more noise reduction panels arranged to cover the housing in combination and configured to absorb noises of different frequencies. In this application, a combination of noise reduction boards that can absorb noise of different frequencies is covered at different positions of the embedded noise reduction device, so that the entire embedded noise reduction device can absorb noise of different frequencies, and the embedded noise reduction device can improve the frequency of noise reduction. Noise reduction effect for a wide range of noise. The present application also discloses a refrigerator.

Description

Built-in noise reduction device, refrigerator

technical field

The present application relates to the technical field of home appliances, for example, to an embedded noise reduction device and a refrigerator.

Background technique

At present, the built-in refrigerator is to embed the refrigerator in the wall cabinet, the wall or the whole cabinet, which not only realizes the maximum utilization rate of the space, but also improves the convenience of people's operation. The sound wave propagation path of built-in refrigerators is very different from that of traditional refrigerators. The noise of traditional refrigerators can be transmitted from the front, left, right, and top, while the noise of built-in refrigerators only propagates from the front to the air. In the narrow space of the cabinet, the sound waves undergo a series of reflections, and through superposition, all propagate from the front end, increasing the noise value of the front end. And the noise sources of refrigerators mainly include compressor noise, pipeline vibration noise, fluid noise and fan noise, etc., which will produce different frequencies of noise. This will directly affect the subjective feelings of users.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

With the development of technology, the noise of the refrigerator itself has been reduced to the extreme. If you want to further reduce the noise, the cost will increase greatly. When using the sound-absorbing device to reduce noise, due to the limited frequency range of the sound-absorbing device, the frequency range is relatively low. The noise reduction effect of wide noise is not obvious.

SUMMARY OF THE INVENTION

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be an extensive review, nor to identify key/critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide an embedded noise reduction device and a refrigerator, so as to solve the technical problem that the noise reduction effect on the noise with a wide frequency range is not obvious at the current stage.

In some embodiments, the embedded noise reduction device includes: a housing with a accommodating cavity formed therein; two or more noise reduction panels arranged to cover the housing in combination and configured to absorb noises of different frequencies.

In some embodiments, the refrigerator includes: a main body and the embedded noise reduction device of any one of the above-mentioned embodiments, and the main body is placed in the accommodating cavity of the embedded noise reduction device.

The embedded noise reduction device and refrigerator provided by the embodiments of the present disclosure can achieve the following technical effects:

The combination of noise reduction boards that can absorb noise of different frequencies is covered at different positions of the embedded noise reduction device, so that the entire embedded noise reduction device can absorb noise of different frequencies and improve the embedded noise reduction device to noises with a wide frequency range. noise reduction effect.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the accompanying drawings, which are not intended to limit the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings do not constitute a limitation of scale, and in which:

FIG. 1 is a schematic structural diagram of an embedded noise reduction device provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of a housing provided by an embodiment of the present disclosure;

3 is a schematic side cross-sectional view of a structure of a noise reduction panel provided by an embodiment of the present disclosure;

Fig. 4 is another structural side sectional schematic diagram of the noise reduction panel provided by the embodiment of the present disclosure;

Fig. 5 is another structural side sectional schematic diagram of the noise reduction panel provided by the embodiment of the present disclosure;

Fig. 6 is another structural side sectional schematic diagram of the noise reduction panel provided by the embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an example of a noise reduction panel combined covering casing provided by an embodiment of the present disclosure;

8 is a schematic diagram of a split structure of a noise reduction panel provided by an embodiment of the present disclosure;

Figure 9 is an enlarged view of A;

10 is a schematic diagram of a combined structure of a noise reduction panel provided by an embodiment of the present disclosure;

11 is a schematic diagram of the arrangement structure of the muffler cavity provided by the embodiment of the present disclosure;

FIG. 12 is another structural side cross-sectional schematic diagram of the noise reduction panel provided by the embodiment of the present disclosure;

13 is a schematic structural diagram of a backplane provided by an embodiment of the present disclosure;

14 is another schematic diagram of the split structure of the noise reduction panel provided by the embodiment of the present disclosure;

15 is another schematic diagram of the split structure of the noise reduction panel provided by the embodiment of the present disclosure;

16 is a schematic structural diagram of a second orifice plate provided by an embodiment of the present disclosure;

FIG. 17 is another schematic structural diagram of the noise reduction panel provided by an embodiment of the present disclosure;

18 is a schematic diagram of the arrangement structure of the muffler channel provided by the embodiment of the present disclosure;

FIG. 19 is a schematic side cross-sectional view of a noise reduction panel provided by an embodiment of the present disclosure;

20 is a schematic diagram of an internal structure of a refrigerator provided by an embodiment of the present disclosure;

FIG. 21 is a schematic diagram of the overall structure of a refrigerator provided by an embodiment of the present disclosure.

Reference number:

100, housing; 101, accommodating cavity; 102, support plate; 200, noise reduction board; 201, first noise reduction board; 202, second noise reduction board; 203, third noise reduction board; 204, fourth noise reduction board plate; 210, back plate; 211, vertical protrusion; 220, first orifice plate; 221, perforation; 222, first raised arm; 230, first gap; 240, muffler cavity; 241, muffler baffle 242, notch; 243, slot; 244, movable partition; 250, porous sound-absorbing plate; 260, second orifice plate; 261, second raised arm; 270, second gap; 280, body; 281 282, muffler channel; 283, first panel; 284, second panel; 285, gap; 286, channel partition; 300, main body; 301, compressor; 400, compressor noise reduction board.

Detailed ways

In order to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, numerous details are provided to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

Embodiments of the present disclosure provide an embedded noise reduction device.

FIG. 1 shows a structure of an embedded noise reduction device provided by an embodiment of the present disclosure, and FIG. 2 shows a structure of a housing provided by an embodiment of the present disclosure.

In some embodiments, the embedded noise reduction device includes: a housing 100 with a accommodating cavity 101 formed therein; two or more noise reduction panels 200 arranged to cover the housing 100 in combination and configured to absorb noises of different frequencies.

With this optional embodiment, the noise reduction panels 200 capable of absorbing noises of different frequencies are combined to cover different positions of the embedded noise reduction device, so that the entire embedded noise reduction device can absorb noises of different frequencies and improve the embedded noise reduction. The noise reduction effect of the device on noise with a wide frequency range.

Optionally, a support plate 102 is provided at the lower part of the inner wall of the housing 100 . With this optional embodiment, the products disposed in the housing 100 are supported by the support plate 102 to prevent the products from directly contacting the bottom of the inner wall of the housing 100 , resulting in crush damage to the noise reduction plate 200 covering the bottom of the inner wall of the housing 100 .

Optionally, the lower side of the support plate 102 is provided with a triangular support beam. With this optional embodiment, the strength of the support plate 102 is increased by the triangular support beams, and the support force of the support plate 102 is improved, so that the support force of the support plate 102 is stronger and the structure is more stable.

Optionally, the support plate 102 and the housing 100 are integrally connected. With this optional embodiment, the structure of the support plate 102 is more stable, and the support force of the support plate 102 is stronger.

Optionally, the noise reduction panel 200 and the housing 100 are detachably connected. With this optional embodiment, the noise reduction plate 200 can be disassembled and replaced, or the position of the noise reduction plate 200 on the housing 100 can be adjusted, which is more flexible in use. Good to improve the noise reduction effect.

Optionally, the noise reduction plate 200 and the casing 100 are connected by a screw fixing structure. With this optional embodiment, the noise reduction plate 200 is fixed on the housing 100 by means of a screw fixing structure, which is convenient for disassembly, and the fixing structure is more stable.

Optionally, the noise reduction plate 200 and the housing 100 are connected by a magnetic attraction structure. By adopting this optional embodiment, disassembly is more convenient, and it is convenient to disassemble the mobile noise reduction plate 200 , so that the combination of the noise reduction plate 200 is more diversified, and the noise reduction effect on noises of different frequencies is improved.

Optionally, the edge of the inner wall of the housing 100 is provided with screw holes. With this alternative embodiment, the noise reduction plate 200 can be fixed to the inner wall of the housing 100 by screws.

Optionally, the edge of the inner wall of the housing 100 is provided with a magnet bar. With this optional embodiment, the noise reduction plate 200 is adsorbed on the inner wall of the housing 100 by the magnetic attraction force of the magnet strip.

Optionally, the noise reduction panels 200 cover the inner wall of the housing 100 in combination. In this optional embodiment, the noise reduction panel 200 is covered on the inner wall of the housing 100, so that the noise reduction panel 200 can be better approached to the noise source, and the noise reduction effect is improved.

Optionally, the noise reduction panel 200 covers all positions of the inner wall of the housing 100 . With this optional embodiment, noise reduction is performed on all positions of the inner wall of the housing 100 through the noise reduction plate 200 to improve the noise reduction effect.

Optionally, the noise reduction plate 200 covers part of the inner wall of the housing 100 . With this optional embodiment, by covering the part of the inner wall of the housing 100 in contact with the noise source with the noise reduction board 200 , the usage of the noise reduction board 200 is reduced, cost is saved, and a good noise reduction effect is maintained.

Optionally, two or more kinds of noise reduction panels 200 are arranged to cover the casing 100 by splicing, or to cover the casing 100 by stacking. With this optional embodiment, the casing 100 can be covered in various combinations, different noises can be reduced, the use is more flexible, and the noise reduction effect can be improved.

Optionally, two or more kinds of noise reduction panels 200 are spliced to cover the housing 100. In this optional embodiment, the noise reduction panels 200 are laid on the housing 100 in the form of splicing and covering, and different positions may be used. The noise reduction board 200 performs noise reduction according to the characteristics of different frequencies of noises at different positions, so as to improve the noise reduction effect of noises at different positions and different frequencies.

Optionally, the size of the noise reduction panel 200 is set so that each side of the housing 100 can be covered by one or more noise reduction panels 200 by splicing. With this optional embodiment, the noise reduction plate 200 can just completely cover the casing 100, thereby improving the noise reduction effect.

Optionally, two or more kinds of noise reduction panels 200 are laminated to cover the casing 100. In this optional embodiment, the casing 100 can be covered in a laminated manner for the same position, and the noise reduction of the single layer of noise reduction panels 200 is The noise part of the device is further reduced, and different noise reduction boards 200 can be used to superimpose noise of different frequencies to reduce noise, so as to improve the overall noise reduction effect and the noise reduction effect of different frequencies.

FIG. 3 shows a structural side section of a noise reduction panel provided by an embodiment of the present disclosure.

Optionally, one of the two or more noise reduction panels 200 includes: a back panel 210; a first orifice panel 220, which has a plurality of perforations 221 for noise to pass through, and covers the back panel 210 and is connected to the back panel. There is a first gap 230 between the 210, and the first gap 230 is provided with muffler cavities 240 of different sizes. In this optional embodiment, the noise enters the muffler cavity 240 between the first orifice plate 220 and the back plate 210 through the perforation 221, and resonance is generated in the muffler cavity 240, thereby consuming the energy of the noise and achieving the effect of noise reduction, Noise at different frequencies can be reduced by the muffler cavity 240 with different sizes.

FIG. 4 shows another structural side section of the noise reduction panel provided by the embodiment of the present disclosure.

Optionally, one of two or more noise reduction panels 200 includes: a back panel 210; a first orifice panel 220, which has a plurality of perforations 221 for noise to pass through, and is covered on the back panel 210, and is connected to the back panel 210. There is a first gap 230 between the plates 210 ; the porous sound-absorbing plate 250 is disposed in the first gap 230 between the first orifice plate 220 and the back plate 210 . With this optional embodiment, the noise enters between the first orifice plate 220 and the back plate 210 through the perforation 221 to generate resonance, thereby consuming the energy of the noise to achieve the effect of noise reduction, and part of the noise is absorbed by the noise in the first gap 230 The porous sound absorbing plate 250 absorbs, so that the noise reduction effect can be improved.

Optionally, the porous sound-absorbing plate 250 is a plate-shaped structure of an integral structure made of sound-absorbing material. With this optional embodiment, the porous sound-absorbing plate 250 is made of sound-absorbing materials with mature technology in the prior art, which has a good sound-absorbing effect and can effectively improve the noise reduction effect.

Optionally, most of the sound-absorbing materials are loose and porous materials, such as slag wool, blankets, etc. The sound-absorbing mechanism is that the sound waves penetrate deep into the pores of the material, and the pores are mostly open pores that penetrate each other inside, and are subject to friction and viscosity of air molecules. resistance, as well as mechanical vibration of the fine fibers, so that the sound energy is converted into heat energy. The sound absorption coefficient of such porous sound absorbing materials generally increases gradually from low frequency to high frequency, so the sound absorption effect of high frequency and medium frequency is better.

FIG. 5 shows another structural side section of the noise reduction panel provided by the embodiment of the present disclosure.

Optionally, one of two or more noise reduction panels 200 includes: a back panel 210 ; a first aperture panel 220 provided with a plurality of perforations 221 for noise to pass through, covering the back panel 210 and being connected to the back panel 210 There is a first gap 230 therebetween; the second orifice plate 260 is provided with a plurality of through holes 221 for noise to pass through, covers the first orifice plate 220 and has a second gap 270 between the second orifice plate 220 . With this optional embodiment, the noise enters the second gap 270 through the through holes 221 of the first orifice plate 220, and generates resonance in the second gap 270, thereby consuming the energy of the noise and achieving the effect of noise reduction. After the first noise reduction of 270, part of the noise enters the first gap 230 through the perforation 221 on the second orifice plate 260, resonates again, consumes the energy of the noise, and part of the noise entering the first gap 230 is reflected. Then, it can re-enter the second gap 270 for noise reduction, and the noise reduction effect can be improved by repeating noise reduction.

Optionally, the edge of the second orifice plate 260 is provided with a second protruding support arm 261, and the second protruding support arm 261 is provided with a screw hole so that the second orifice plate 260 can be fixed to the housing through the second protruding support arm 261 100 on. With this optional embodiment, it is convenient to use the second protruding support arms 261 on the second orifice plate 260 to fix the entire noise reduction plate 200 on the housing 100 .

Optionally, the second protruding support arm 261 includes two vertical surfaces, wherein the edge of one surface is vertically connected to the edge of the second orifice plate 260, and the other surface is provided with screw holes. With this optional embodiment, it is convenient to use the second protruding support arms 261 on the second orifice plate 260 to fix the entire noise reduction plate 200 on the housing 100 .

Optionally, the width of the side where the second convex support arm 261 is connected to the second orifice plate 260 is greater than the width of the side where the first convex support arm 222 is connected to the first orifice plate 220, and the width of the side of the second convex support arm 261 The other side covers the other side of the first protruding support arm 222 . With this optional embodiment, when the second orifice plate 260 covers the first orifice plate 220, the second protruding support arm 261 is supported on the first protruding support arm 222, and connects the second orifice plate 260 with the first orifice plate 220. A certain distance is supported between the plates 220 to form a second gap 270 .

FIG. 6 shows another structural side section provided by an embodiment of the present disclosure.

Optionally, one of two or more kinds of noise reduction panels 200 includes: a body 280 having a sound inlet 281 and a plurality of sound-absorbing channels 282 with different lengths inside, and the sound-absorbing channels 282 communicate with the sound inlet 281 ; The back plate 210 covers one side of the main body 280 and is configured to close one side of the sound inlet 281 . With this optional embodiment, the noise enters the muffler channel 282 in the main body 280 through the sound inlet 281, and is separated by the interference of sound waves. The reflected sound wave of the frequency and the sound wave of the same frequency in the cavity cancel each other due to the opposite phase, so as to achieve the purpose of noise reduction. The 1/4 wavelength of the noise and the wavelength of the same length of the noise cancellation channel 282 are cancelled. It realizes sound absorption and noise reduction for noises of different frequencies, thereby effectively improving the noise reduction effect on noises with a wide frequency range.

FIG. 7 shows an example structure of the noise reduction panel combined covering casing provided by the embodiment of the present disclosure.

As an example, there are four types of noise reduction panels 200 , namely, a first noise reduction panel 201 , a second noise reduction panel 202 , a third noise reduction panel 203 , and a fourth noise reduction panel 204 .

The first noise reduction plate 201 is configured to include: a back plate 210; a first orifice plate 220, which has a plurality of perforations 221 for noise to pass through, covers the back plate 210, and has a first gap 230 between the back plate 210 and the back plate 210. The first gap 230 is provided with muffler cavities 240 of different sizes.

The second noise reduction plate 202 is configured to include: a back plate 210 ; a first orifice plate 220 having a plurality of through holes 221 for noise to pass through, and covering the back plate 210 with a first gap 230 between the back plate 210 and the back plate 210 . ; The porous sound-absorbing plate 250 is arranged in the first gap 230 between the first orifice plate 220 and the back plate 210 .

The third noise reduction plate 203 is configured as one of two or more types of noise reduction plates 200 , including: a back plate 210 ; a first orifice plate 220 provided with a plurality of perforations 221 for noise to pass through, covering the back plate 210 and There is a first gap 230 between it and the back plate 210 ; the second orifice plate 260 is provided with a plurality of through holes 221 for noise to pass through, covers the first orifice plate 220 and has a second gap 270 between the first orifice plate 220 .

The fourth noise reduction plate 204 is configured to include: a main body 280 with a sound inlet 281, and a plurality of sound-absorbing channels 282 with different lengths are arranged inside, and the sound-absorbing channels 282 communicate with the sound inlet 281; the back plate 210 covers the body 280. One side is configured to close one side of the sound inlet 281 .

Wherein, each side of the inner wall of the housing 100 is spliced and just covered by the first noise reduction plate 201 , the second noise reduction plate 202 and the third noise reduction plate 203 from top to bottom, and the fourth noise reduction plate 204 covers The bottom side of the inner wall of the casing 100 and the sound inlet 281 is upward, so that household appliances such as refrigerators can be embedded into the accommodating cavity 101 in the casing 100 .

This embodiment discloses a noise reduction board.

FIG. 8 shows a split structure of a noise reduction board provided by an embodiment of the present disclosure, FIG. 9 shows a partially enlarged structure of a noise reduction board provided by an embodiment of the present disclosure, and FIG. 10 shows a noise reduction board provided by an embodiment of the present disclosure. The combined structure of the noise reduction plate, FIG. 11 shows the arrangement structure of the muffler cavity provided by the embodiment of the present disclosure, FIG. 12 shows the structure of the back plate provided by the embodiment of the present disclosure, and FIG. 13 shows the embodiment of the present disclosure. The structure of the provided first orifice plate, FIG. 14 shows another split structure of the noise reduction plate provided by the embodiment of the present disclosure, and FIG. 15 shows another split structure of the noise reduction plate provided by the embodiment of the present disclosure 16 shows the structure of the second orifice plate provided by the embodiment of the present disclosure.

In some embodiments, the noise reduction panel 200 includes: a back panel 210 ; a first orifice panel 220 having a plurality of through holes 221 for noise to pass through, covering the back panel 210 and having a first gap 230 between the back panel 210 and the back panel 210 , the first gap 230 is provided with muffler cavities 240 of different sizes.

With this optional embodiment, based on the principle of Helmholtz resonance, muffler cavities 240 of different sizes are arranged in the noise reduction panel. After the noise enters the muffler cavities 240 of different sizes, each muffler cavity 240 has a different resonance frequency , so that the entire noise reduction board can absorb noises of different frequencies, and improve the noise reduction effect of the noise reduction board on noises with a wide frequency range.

Optionally, the edge of the first gap 230 is a closed structure. With this optional embodiment, the edge of the first gap 230 is sealed to prevent noise from leaking from the edge of the first gap 230 , so that the noise can be sufficiently reduced in the first gap 230 to improve the noise reduction effect.

Optionally, the edge of the back plate 210 has vertical protrusions 211 , so that the back plate 210 presents a groove-shaped structure, and is configured to close the edge of the first gap 230 . In this optional embodiment, the edge of the first gap 230 is closed by the vertical protrusion 211 on the edge of the back plate 210 , the structure is simple and easy to implement, the noise can be sufficiently reduced in the first gap 230, and the noise reduction can be improved. Effect.

Optionally, the edge of the first orifice plate 220 is provided with a first protruding arm 222, and the first protruding arm 222 is provided with a screw hole so that the first orifice plate 220 can be fixed on the housing through the first protruding arm 222 100 on. With this optional embodiment, it is convenient to use the first protruding support arm 222 on the first orifice plate 220 to fix the entire noise reduction plate 200 on the housing 100 .

Optionally, the first protruding support arm 222 includes two vertical surfaces, wherein the edge of one surface is vertically connected to the edge of the first orifice plate 220, and the other surface is provided with screw holes. With this optional embodiment, it is convenient to use the first protruding support arm 222 on the first orifice plate 220 to fix the entire noise reduction plate 200 on the housing 100 .

Optionally, the back plate 210 and the first orifice plate 220 are detachably connected. With this optional embodiment, the back plate 210 and the first orifice plate 220 are disassembled to facilitate cleaning or adjustment of the muffler cavity 240 between the back plate 210 and the first orifice plate 220 .

Optionally, the back plate 210 and the first orifice plate 220 are fixedly connected by screws. With this optional embodiment, the back plate 210 and the first orifice plate 220 can be effectively and fixedly connected by screws, so that the connection between the back plate 210 and the first orifice plate 220 is stable and easy to disassemble.

Optionally, the first orifice plate 220 is provided with screw fixing holes, and the positions corresponding to the screw fixing holes on the back plate 210 are also provided with screw fixing holes. The board 220 is fixedly connected with the backplane 210 . By adopting this optional embodiment, the connection between the back plate 210 and the first orifice plate 220 is stable and easy to disassemble.

Optionally, the back plate 210 and the first orifice plate 220 are connected by snaps. With this optional embodiment, the back plate 210 and the first orifice plate 220 are connected by a snap structure, which facilitates the disassembly and connection between the back plate 210 and the first orifice plate 220 .

Optionally, the back plate 210 is provided with clamping teeth, and the first orifice plate 220 is provided with clamping grooves. In this optional embodiment, the back plate 210 and the first orifice plate 220 can be connected by inserting the locking teeth into the card slots, so as to facilitate the disassembly and connection between the back plate 210 and the first orifice plate 220 .

Optionally, the muffling cavities 240 with different sizes do not communicate with each other. With this optional embodiment, each muffler cavity 240 forms an independent space, which facilitates the resonance of sound waves in the independent muffler cavity 240 and improves the noise reduction effect.

Optionally, it further includes: a sound-absorbing baffle 241 configured to separate the first gap 230 to obtain sound-absorbing cavities 240 of different sizes. With this optional embodiment, the sound-absorbing baffle plate 241 is supported in the back plate 210 and the first orifice plate 220, so that the stability between the back plate 210 and the first orifice plate 220 is improved, and different sizes can be better obtained. The muffler cavity 240 improves the noise reduction effect.

Optionally, the sound-absorbing baffle 241 is an integral structure, and the whole is clamped in the first gap 230 . With this optional embodiment, it is convenient to manufacture, and the structure of the sound-absorbing baffle 241 is more stable, and is not easily deformed, and the structural stability of the sound-absorbing cavity 240 is enhanced.

Optionally, the sound-absorbing baffle 241 is fixedly connected to the back plate 210 and the first orifice plate 220 by welding or gluing. By adopting this optional embodiment, the independence of the anechoic chambers 240 can be maintained, so as to prevent mutual influence and reduce the noise reduction effect.

Optionally, a part of the muffling baffle 241 is detachably installed, and is configured to connect two or more muffling cavities 240 through disassembly. With this optional embodiment, a larger volume of the muffler cavity 240 can be obtained by connecting two or more muffler cavities 240 , the size of the muffler cavity 240 can be adjusted, and the noise reduction effect of different frequencies is better.

Optionally, notches 242 are formed on part of the sound-absorbing baffles 241 , slots 243 are formed on the sound-absorbing baffles 241 at both ends of the notches 242 , and movable baffles 244 are arranged in the slots 243 . In this optional embodiment, the gap 242 of the muffler partition 241 is closed by inserting both ends of the movable partition 244 into the slot 243, and when the movable partition 244 is removed, the gap is connected to two or more mufflers. For the acoustic cavity 240, the size of the muffler cavity 240 is adjusted, and the noise reduction effect for different frequencies of noise is better.

Optionally, it further includes: a porous sound-absorbing plate 250 disposed in the sound-absorbing cavity 240 . With this optional embodiment, the porous sound-absorbing plate 250 is used to absorb the noise entering the sound-absorbing cavity 240 to improve the noise reduction effect.

Optionally, the size of the porous sound-absorbing plate 250 is adapted to the size setting of the sound-absorbing cavity 240 , so that it will not shake in the sound-absorbing cavity 240 . With this optional embodiment, the porous sound-absorbing plate 250 is placed in the sound-absorbing cavity 240 without shaking, thereby preventing the generation of noise.

Optionally, it also includes: a second orifice plate 260 having a plurality of through holes 221 for noise to pass through, covering the first orifice plate 220 and having a second gap 270 between the first orifice plate 220 . With this optional embodiment, the noise enters the second gap 270 through the through holes 221 of the first orifice plate 220, and generates resonance in the second gap 270, thereby consuming the energy of the noise and achieving the effect of noise reduction. After the first noise reduction of 270, part of the noise enters the first gap 230 through the perforation 221 on the second orifice plate 260, resonates again, consumes the energy of the noise, and part of the noise entering the first gap 230 is reflected. Then, it can re-enter the second gap 270 for noise reduction, and the noise reduction effect can be improved by repeating noise reduction.

Optionally, the first orifice plate 220 and the second orifice plate 260 have different perforation rates. With this optional embodiment, different perforation rates can absorb noises of different frequencies. By setting different perforation rates for the first orifice plate 220 and the second orifice plate 260, noises of different frequencies can be absorbed, and the noise of different frequencies can be improved. noise reduction effect.

Optionally, the through holes 221 of the first orifice plate 220 and the second orifice plate 260 have different diameters. With this optional embodiment, different apertures can absorb noises of different frequencies. By setting different apertures through the through holes 221 of the first orifice plate 220 and the second orifice plate 260 , noises of different frequencies can be absorbed and noise at different frequencies can be improved. noise reduction effect.

Optionally, the first orifice plate 220 and the second orifice plate 260 have different thicknesses. In this optional embodiment, the thicknesses of the first orifice plate 220 and the second orifice plate 260 are different, which is equivalent to different depths of the through holes 221 , and the through holes 221 have different depths to absorb noise of different frequencies and improve the noise immunity of different frequencies. noise reduction effect.

Optionally, the first gap 230 and the second gap 270 have different thicknesses. With this optional embodiment, different thicknesses of the first gap 230 and the second gap 270 can absorb noise of different frequencies, thereby improving the noise reduction effect on noise of different frequencies.

Optionally, the relationship between noise reduction frequency and perforation rate, plate thickness, aperture, and air layer depth is as follows:

其中，

in,

f _r is the noise reduction frequency; c is the speed of sound; P is the perforation rate; t is the plate thickness, that is, the thickness of the first orifice plate 220 and the second orifice plate 260; d is the aperture, that is, the diameter of the perforation 221; L is the air layer The depth is the thickness of the first gap 230 and the second gap 270 . With this optional embodiment, the values of each parameter are adjusted according to the formula, so that the noise of different frequencies can be absorbed.

FIG. 17 shows another structure of the noise reduction board provided by the embodiment of the present disclosure, FIG. 18 shows the arrangement structure of the noise reduction channel provided by the embodiment of the present disclosure, and FIG. 19 shows the noise reduction provided by the embodiment of the present disclosure. A side profile of the board.

In some embodiments, the noise reduction panel 200 includes: a body 280 having a sound inlet 281 , and a plurality of sound-absorbing channels 282 with different lengths are disposed inside, and the sound-absorbing channels 282 communicate with the sound inlet 281 .

In this optional embodiment, the sound wave interference is used. After the sound wave enters the sound-absorbing channel 282, it is reflected back to the sound-absorbing channel 282 by the other end of the sound-absorbing channel 282. The reflected sound waves of certain frequencies and the sound waves of the same frequency in the cavity are opposite to each other due to the opposite phase. The 1/4 wavelength of the noise and the wavelength with the same length of the silencing channel 282 are canceled, and the silencing channels 282 with different lengths can achieve sound absorption and noise reduction for different frequencies of noise, thereby effectively improving the Noise reduction effect on noise with a wide frequency range.

Optionally, the body 280 includes a muffler channel 282 surrounding the inner circumference of the body. With this optional embodiment, the length of the noise cancellation channel 282 can be sufficiently increased to reduce noise with larger wavelengths.

Optionally, it further includes: a back plate 210 covering one side of the sound inlet 281 of the body 280 and configured to close one side of the sound inlet 281 . In this optional embodiment, one side of the sound inlet 281 is closed to reflect the sound waves of the noise, so that the sound waves can more easily enter the noise reduction channel 282, thereby improving the noise reduction effect.

Optionally, the back plate 210 is a flat plate. In this optional embodiment, the back plate 210 is used as the base of the main body 280, which better covers one side of the main body 280, and has a better sound wave reflection effect, so that the sound waves can more easily enter the sound-absorbing channel 282, and then Improve noise reduction.

Optionally, a side edge of the back plate 210 is provided with a protruding portion, and the protruding portion is provided with a screw hole. With this optional embodiment, it is convenient to connect the back plate 210 to its installation location.

Optionally, the back plate 210 is made of high-density material. Such as stainless steel plate, ceramic plate. With this optional embodiment, the reflection effect of the backplane 210 on sound waves is improved, thereby improving the noise reduction effect.

Optionally, the body 280 includes: a first panel 283; a second panel 284; parallel to the first panel 283 and having a gap 285 with the first panel 283; a channel partition 286; In the gap 285 between the first panels 283 , a muffler channel 282 is obtained by separating the gap 285 between the second panel 284 and the first panel 283 . With this alternative embodiment, the channel partitions 286 are supported between the first panel 283 and the second panel 284 to enhance the stability of the first panel 283 and the second panel 284 .

Optionally, the channel partition 286 has an integral structure, and is integrally clamped in the gap 285 between the second panel 284 and the first panel 283 . With this optional embodiment, it is convenient to manufacture, and the structure of the channel partition plate 286 is more stable, so that the channel partition plate 286 is not easily deformed, and the stability of the structure of the muffler channel 282 is maintained.

Optionally, the channel partition 286 is fixedly connected to the first panel 283 and the second panel 284 by welding or gluing. By adopting this optional embodiment, the connection between the channel partition plate 286 and the first panel 283 and the second panel 284 is more stable, so that the sound-absorbing channels 282 separated by the channel partition plate 286 are sealed and independent from each other, and the adjacent sound-absorbing channels will not be formed. 282's sound wave leaks, which in turn affects the noise reduction effect.

Optionally, one of the first panel 283 and the second panel 284 is provided with a sound inlet 281 . With this optional embodiment, the sound inlet 281 is open on one side, and after the sound waves of noise enter from the sound inlet 281, it is easier to enter the noise reduction channel 282 through reflection, thereby improving the noise reduction effect.

Optionally, one end of the muffler passage 282 is communicated with the sound inlet 281, and the other end is closed. In this optional embodiment, the other end of the muffler channel 282 is closed, which can reflect the noise sound waves, and the reflected noise sound waves and the newly entered noise sound waves interfere and cancel each other, thereby improving the noise reduction effect.

Optionally, both ends of the silencing channel 282 are communicated with the sound inlet 281 . In this optional embodiment, both ends of the muffler channel 282 enter noise sound waves at the same time, and the sound waves of the same frequency meet in the muffler channel 282 to interfere and cancel each other, thereby improving the noise reduction effect.

Optionally, both ends of the muffler passage 282 are communicated with the sound inlet 281 , and a sealing sheet is provided inside the muffler passage 282 to separate the muffler passage 282 into two parts of different sizes. By adopting this optional embodiment, silencing channels 282 with different lengths are obtained, noise of different frequencies can be reduced, and the noise reduction effect can be improved.

Optionally, the body 280 has a rectangular structure, and the sound-absorbing channels 282 are parallel to the sides of the rectangular structure of the body 280 . With this optional embodiment, the body 280 can accommodate more sound-absorbing channels 282 of different lengths, thereby improving the noise reduction effect.

Optionally, the partial silencer channel 282 is configured as a straight line configuration, and the partially silenced channel 282 is configured to have one or more right angle turns. With this optional embodiment, the length of the muffler channel 282 is increased by a right-angle turn, and in the limited space of the main body 280 without affecting the density of the muffler channel 282 inside the main body 280, a variety of muffler channels 282 of different lengths can be provided, Improves the noise reduction effect on noise with a wide frequency range.

Embodiments of the present disclosure provide a refrigerator.

FIG. 20 shows the internal structure of the refrigerator provided by the embodiment of the present disclosure, and FIG. 21 shows the overall structure of the refrigerator provided by the embodiment of the present disclosure.

In some embodiments, the refrigerator includes: a main body 300 and the noise reduction panel 200 of any one of the above-mentioned embodiments, the noise reduction panel 200 being disposed under the interior of the main body 300 .

With this optional embodiment, the noise reduction plate 200 is used to reduce noise inside the refrigerator, thereby improving the noise reduction effect of the refrigerator and improving the user experience.

Optionally, the main body 300 includes a compressor compartment 301 disposed above the sound inlet 281 of the noise reduction panel 200 . With this optional embodiment, the main noise source of the refrigerator is the noise generated by the compressor, and the main noise source is aimed at the sound inlet 281 of the noise reduction panel 200 , so that the noise can more easily enter the muffler channel 282 through the sound inlet 281 , to improve the noise reduction effect.

Optionally, the refrigerator further includes: a compressor noise reduction panel 400 disposed outside the compressor compartment 301 , or disposed inside the compressor compartment 301 . With this optional embodiment, the compressor noise reduction plate 400 is used to enhance the noise reduction effect on the compressor compartment 301, thereby improving the noise reduction effect of the entire refrigerator.

Optionally, the compressor noise reduction panel 400 covers the outer side wall of the compressor compartment 301 . With this optional embodiment, the installation of the compressor noise reduction plate 400 is convenient, and it is in direct contact with the compressor compartment 301, so as to better absorb and reduce noise.

Optionally, the compressor noise reduction panel 400 covers the inner side wall of the compressor compartment 301 . With this optional embodiment, the compressor noise reduction plate 400 is made closer to the noise source, thereby increasing the noise reduction effect.

Optionally, the compressor noise reduction plate 400 is covered on the inner side wall of the main body 300 near the compressor compartment 301 . With this optional embodiment, the installation of the compressor noise reduction plate 400 is facilitated.

Optionally, the compressor noise reduction panel 400 may be the noise reduction panel 200 of any of the above embodiments.

In some embodiments, the refrigerator includes: a main body 300 and the embedded noise reduction device of any one of the above-mentioned embodiments, and the main body 300 is placed in the accommodating cavity 101 of the embedded noise reduction device.

With this optional embodiment, an embedded noise reduction device is wrapped on the outside of the refrigerator, which improves the overall noise reduction effect of the refrigerator and provides a better experience for the user.

The foregoing description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples are only representative of possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of the embodiments of this application includes the full scope of the claims, along with all available equivalents of the claims. The terms "comprising", "comprising" or any other variation thereof herein are intended to encompass a non-exclusive inclusion such that a device comprising a list of elements includes not only those elements but also other elements not expressly listed, or is Also included are elements inherent to such equipment. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the device comprising the element. The various embodiments herein are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

The terms "portrait", "landscape", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the text and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operates in a specific orientation, and therefore should not be construed as a limitation of the present application. In the description herein, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a mechanical connection or an electrical connection, or the internal communication between two elements, It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations. The scope of the disclosed embodiments includes the full scope of the claims, along with all available equivalents of the claims.

Claims (10)

1. an embedded noise reduction device, is characterized in that, comprises: a shell, with a accommodating cavity formed inside; Two or more types of noise reduction panels, arranged to cover the housing in combination, are configured to absorb noise of different frequencies. 2. The embedded noise reduction device according to claim 1, wherein one of the two or more noise reduction panels comprises: backplane; The first orifice plate has a plurality of perforations for noise to pass through, covers the back plate, and has a first gap between the back plate and the back plate, and the first gap is provided with anechoic cavities of different sizes. 3. The embedded noise reduction device according to claim 1, wherein one of the two or more noise reduction panels comprises: backplane; a first orifice plate, which has a plurality of perforations for noise to pass through, is covered on the back plate, and has a first gap between the back plate and the back plate; The porous sound-absorbing plate is arranged in the first gap between the first orifice plate and the back plate. 4. The embedded noise reduction device of claim 1, wherein one of the two or more noise reduction panels comprises: backplane; a first orifice plate with a plurality of perforations for noise to pass through, covering the back plate and having a first gap between the back plate and the back plate; The second orifice plate has a plurality of perforations for noise to pass through, covers the first orifice plate and has a second gap with the first orifice plate. 5. The embedded noise reduction device of claim 1, wherein one of the two or more noise reduction panels comprises: The main body has a sound inlet, and is internally provided with a plurality of silencing channels with different lengths, and the sound absorbing channels are communicated with the sound inlet; A back plate, covering one side of the body, is configured to close one side of the sound inlet. 6 . The embedded noise reduction device according to claim 1 , wherein a support plate is provided at a lower part of the inner wall of the casing. 7 . 7 . The embedded noise reduction device according to claim 1 , wherein the noise reduction plate and the housing are detachably connected. 8 . 8 . The embedded noise reduction device according to claim 1 , wherein the noise reduction plate combination covers the inner wall of the casing. 9 . 9. The embedded noise reduction device according to any one of claims 1 to 5, wherein the two or more noise reduction panels are configured to cover the outer shell by splicing, or to cover the outer shell by lamination . 10. A refrigerator, characterized in that it comprises a main body and the embedded noise reduction device according to any one of claims 1 to 9, wherein the main body is placed in a accommodating cavity of the embedded noise reduction device.

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