Refrigerator noise reduction device and refrigerator including the same

Abstract

This utility model provides a refrigerator noise reduction device and a refrigerator including the same. The refrigerator noise reduction device is disposed within the ventilation duct of the refrigerator. The device includes a main body with multiple noise reduction cavities within it. Each noise reduction cavity includes a connected chamber and a connecting hole. The axial ends of the connecting hole are respectively connected to the chamber and the ventilation duct. At least two noise reduction cavities have different diameters of their connecting holes, and the chambers connected by the connecting holes with different diameters have different volumes. The refrigerator includes the refrigerator noise reduction device described above. By the above-described configuration, the refrigerator noise reduction device simultaneously changes the volume of the sound-absorbing chamber and the diameter of the connecting hole of the connected chamber, allowing the noise reduction cavity to have multiple combinations of connecting hole diameters and chamber volumes. This enables it to absorb more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device and improving the noise absorption effect.

Description

Technical Field

[0001] This utility model relates to the field of refrigerators, and in particular to a refrigerator noise reduction device and a refrigerator including the same. Background Technology

[0002] Currently, fully built-in refrigerators, with their sides surrounded by cabinets, are forced to use a bottom-mounted air duct for compressor cooling. This duct outlet is located directly at the front of the refrigerator and directly connected to the compressor compartment, making it easy for wideband compressor noise (200Hz-2kHz) to be transmitted to the user's living area via airflow, significantly diminishing the quiet operation advantage of the built-in design.

[0003] Existing noise reduction solutions have two limitations: First, while attaching porous sound-absorbing cotton inside the duct can absorb some broadband noise, it increases the roughness of the inner wall, inducing turbulent noise, and also encroaches on the narrow duct space, reducing heat dissipation efficiency. Second, in order to absorb more frequencies of noise, traditional resonant holes slightly adjust the volume of the chamber. However, according to the principle of Helmholtz resonance sound absorption, noise resonance is not only related to the volume of the chamber but also to the size of the connecting hole between the chamber and the outside. Therefore, simply changing the volume of the chamber can only absorb a very limited range of noise frequencies.

[0004] This noise pollution can easily cause many harms, such as continuous broadband noise violating residential sound environment standards, causing users to experience anxiety and sleep disorders; the damp environment at the bottom can cause the sound-absorbing cotton to become moldy, contaminating the equipment and creating health hazards. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology where the noise of the refrigerator compressor is a wide frequency band, and the traditional resonant noise reduction hole has a limited frequency range for absorbing noise, resulting in poor noise reduction effect. The present invention provides a refrigerator noise reduction device and a refrigerator including the present invention.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This utility model discloses a refrigerator noise reduction device, which is installed inside the refrigerator's ventilation duct. The refrigerator noise reduction device includes a device body, and multiple noise reduction cavities are provided inside the device body. Each noise reduction cavity includes a connected chamber and a connecting hole. The axial ends of the connecting hole are respectively connected to the chamber and the ventilation duct. The diameters of the connecting holes of at least two noise reduction cavities are different, and the volumes of the chambers connected by the connecting holes with different diameters are different.

[0008] In this solution, the refrigerator noise reduction device, through the above-mentioned settings, simultaneously changes the volume of the sound-absorbing chamber and the aperture of the connecting hole in the connecting chamber, so that the noise reduction chamber has a combination of multiple connecting hole apertures and chamber volumes, thereby absorbing more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device, and improving the noise absorption effect.

[0009] Preferably, at least some of the noise reduction cavities are arranged in a straight line to form a set of noise reduction cavity modules, and the arrangement direction of the noise reduction cavities is a first direction; along the first direction, the aperture of the connecting holes of the plurality of noise reduction cavities in a single noise reduction cavity module gradually decreases, and the corresponding volume of the cavity gradually increases.

[0010] In this scheme, through the above-described configuration, since the cavity volume is negatively correlated with the sound absorption frequency and the aperture of the connecting hole is positively correlated with the sound absorption frequency, the connecting hole with a small aperture is matched with a large-volume cavity, and the connecting hole with a large aperture is matched with a small-volume cavity, thereby expanding the frequency range of sound absorption.

[0011] Preferably, the plurality of the noise reduction cavity modules are arranged along a second direction perpendicular to the first direction to form a noise reduction cavity array.

[0012] In this scheme, by adding noise reduction cavities to form an array, the area covered by the noise reduction cavities is increased due to the increase in the number of noise reduction cavities, which can further increase the sound absorption effect.

[0013] Preferably, the apertures of the connecting holes of the noise reduction cavities at the same height in the first direction of the plurality of noise reduction cavity modules are the same, and the apertures of the corresponding cavities gradually increase along the second direction.

[0014] In this scheme, through the above-mentioned arrangement, since the diameter of the connecting holes at the same height along the first direction remains unchanged while the volume of the chamber changes, the noise frequency absorbed by each noise reduction cavity arranged along the second direction is different, thereby further widening the frequency range of noise absorption and improving the overall sound absorption effect.

[0015] Preferably, the main body of the device includes two noise reduction cavity arrays, the walls of the chambers of the two noise reduction cavity arrays abut each other, and the connecting holes of the two noise reduction cavity arrays are respectively disposed on the opposite outer walls of the main body of the device.

[0016] In this solution, by setting up noise reduction cavities on both sides of the main body of the device, the utilization rate of the inner cavity of the noise reduction main body can be improved. This allows for the maximum number of noise reduction cavities on a single main body to reduce the number of main bodies required for the refrigerator, thereby reducing the impact on wind resistance.

[0017] Preferably, the two noise-reducing cavity arrays are centrally symmetrical with respect to the center of the device body.

[0018] In this scheme, since the volumes of the chambers in the noise reduction cavity array on one side are different, the space for arranging the chambers in the noise reduction cavity array on the other side is also not uniform. When the two noise reduction cavity arrays are symmetrical about the center of the device body, the larger chamber in one noise reduction cavity array can be placed against the smaller chamber in the other noise reduction cavity array. That is, in the axial direction of the two noise reduction cavities facing away from each other, the sum of the lengths of the chambers in the two noise reduction cavity arrays in that direction is equal everywhere, thereby maximizing the structural utilization of the device body.

[0019] Preferably, the axial direction of the connecting hole is perpendicular to the extension direction of the ventilation duct.

[0020] In this solution, the above-mentioned settings prevent airflow from directly impacting the connecting hole and generating additional noise.

[0021] This utility model also provides a refrigerator, which includes the refrigerator noise reduction device as described above.

[0022] In this solution, the refrigerator noise reduction device, through the above-mentioned settings, simultaneously changes the volume of the sound-absorbing chamber and the aperture of the connecting hole in the connecting chamber, so that the noise reduction chamber has a combination of multiple connecting hole apertures and chamber volumes, thereby absorbing more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device, and improving the noise absorption effect.

[0023] Preferably, the ventilation duct includes an air inlet channel and an air outlet channel for the refrigerator, and the refrigerator noise reduction device is disposed in the air inlet channel and / or the air outlet channel.

[0024] In this design, the air inlet and outlet ducts are areas where noise is concentrated. Installing a refrigerator noise reduction device in these areas can improve the efficiency of sound absorption.

[0025] Preferably, the refrigerator includes a plurality of refrigerator noise reduction devices, wherein the sum of the widths of the plurality of refrigerator noise reduction devices in the direction of the cross-sectional width of the air inlet channel is not greater than 30% of the cross-sectional width of the air inlet channel; and / or, the sum of the widths of the plurality of refrigerator noise reduction devices in the direction of the cross-sectional width of the air outlet channel is not greater than 30% of the cross-sectional width of the air outlet channel.

[0026] In this design, since the refrigerator noise reduction device has a certain volume, its placement within the air inlet or outlet duct will occupy some airflow space. Therefore, ensuring that the sum of the widths of the refrigerator noise reduction device in the cross-sectional width direction of the air inlet or outlet duct does not exceed 30% can guarantee smooth airflow.

[0027] The positive and progressive effects of this utility model are as follows:

[0028] This utility model provides a refrigerator noise reduction device and a refrigerator including the same. The refrigerator noise reduction device, through the above-mentioned settings, simultaneously changes the volume of the sound-absorbing chamber and the aperture of the connecting hole of the connecting chamber, so that the noise reduction chamber has a combination of multiple connecting hole apertures and chamber volumes, thereby absorbing more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device, and improving the noise absorption effect. Attached Figure Description

[0029] Figure 1 This is a perspective view of a refrigerator noise reduction device according to an embodiment of the present invention.

[0030] Figure 2 A cross-sectional view of the refrigerator noise reduction device according to an embodiment of this utility model. Figure 1 .

[0031] Figure 3 A cross-sectional view of the refrigerator noise reduction device according to an embodiment of this utility model. Figure 2 .

[0032] Figure 4 A cross-sectional view of the refrigerator noise reduction device according to an embodiment of this utility model. Figure 3 .

[0033] Figure 5 This is a perspective view of the refrigerator noise reduction device assembled in a refrigerator according to an embodiment of the present invention.

[0034] Figure 6 This is a front view of the refrigerator noise reduction device according to an embodiment of the present invention, in the cross-sectional direction of the air outlet channel and the air inlet channel.

[0035] Explanation of reference numerals in the attached figures:

[0036] Refrigerator noise reduction device 1000

[0037] Device body 1

[0038] Noise Reduction Chamber 2

[0039] Chamber 201

[0040] Connecting hole 202

[0041] First direction 3

[0042] Second direction 4

[0043] First array 5

[0044] Second array 6

[0045] Air intake channel 7

[0046] Air outlet 8

[0047] Noise Reduction Cavity Module 9 Detailed Implementation

[0048] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0049] like Figures 1 to 6 As shown, this embodiment provides a refrigerator noise reduction device 1000. The refrigerator noise reduction device 1000 is disposed in the ventilation duct of the refrigerator. The ventilation duct can be an air inlet channel 7, an air outlet channel 8, or other heat dissipation channels. The refrigerator noise reduction device 1000 includes a device body 1, and a plurality of noise reduction cavities 2 are disposed in the device body 1. Each noise reduction cavity 2 includes a connected chamber 201 and a connecting hole 202. The connecting hole 202 connects the chamber 201 to the ventilation duct. The diameters of the connecting holes 202 of the plurality of noise reduction cavities 2 are different, and the volumes of the chambers 201 connected by the connecting holes 202 with different diameters are also different.

[0050] Thus, the refrigerator noise reduction device 1000, through the above-mentioned settings, calculates the resonant frequency according to the Helmholtz resonance sound absorption formula: Thus, by simultaneously changing the volume of the sound-absorbing chamber 201 and the aperture of the connecting hole 202 of the connecting chamber 201, the noise reduction cavity 2 can have a variety of combinations of connecting hole 202 apertures and chamber 201 volumes, thereby absorbing more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device 1000, and improving the noise absorption effect.

[0051] In this embodiment, multiple noise reduction cavities 2 are arranged in a straight line to form a group of noise reduction cavity modules 9, and the arrangement direction of the noise reduction cavities 2 is the first direction 3, such as... Figure 1 As shown, in this embodiment, the first direction 3 refers to the height direction of the device body 1. In other embodiments, the first direction 3 may also refer to the length or width direction of the device body 1, except that the placement direction of the refrigerator noise reduction device 1000 is different. Along the first direction 3, the aperture of the connecting holes 202 of the multiple noise reduction cavities 2 in a single noise reduction cavity module 9 gradually decreases, and the volume of the corresponding cavity 201 gradually increases. Through the above settings, since the volume of the cavity 201 is negatively correlated with the sound absorption frequency, and the aperture of the connecting hole 202 is positively correlated with the sound absorption frequency, the connecting hole 202 with a small aperture is matched with the cavity 201 with a large volume, and the connecting hole 202 with a large aperture is matched with the cavity 201 with a small volume, thereby expanding the frequency range of sound absorption.

[0052] Specifically, such as Figure 1 As shown, multiple noise reduction cavity modules 9 are arranged along a second direction 4 perpendicular to the first direction 3 to form a noise reduction cavity array. Figure 2As shown, the noise reduction cavity array includes a first array 5 disposed on one side of the device body 1 and a second array 6 disposed on the other side of the device 1. In this embodiment, when the first direction 3 is the height direction of the device body 1, the second direction 4 refers to the length direction of the device body 1 from left to right. The spacing between each noise reduction cavity 2 is equal, thus forming a first array 5 with equal spacing on one end face of the device body 1. By increasing the number of noise reduction cavities 2 to form an array, the area covered by the noise reduction cavities 2 increases due to the increased number of cavities 2, further enhancing the sound absorption effect.

[0053] Furthermore, the diameter of the connecting hole 202 along the second direction 4 remains unchanged, while the volume of the chamber 201 along the second direction 4 gradually increases. Through the above arrangement, since the diameter of the connecting hole 202 along the second direction 4 remains unchanged while the volume of the chamber 201 changes, the noise frequency absorbed by each group of noise reduction cavities 2 along the second direction 4 is different, thereby further widening the frequency range of noise absorption and improving the overall sound absorption effect.

[0054] Furthermore, the cross-sectional area of ​​chamber 201 along the axis of the connecting hole 202 is defined to be the same, and the volume of chamber 201 is characterized by the depth of chamber 201 along the axis of the connecting hole 202. The aperture of the connecting hole 202 and the volume of chamber 201 in the first array 5 vary according to the following rules:

[0055] In the first array 5, the aperture of the connecting hole 202 along the first direction 3 is determined according to Formula 1: Gradually decreasing, where n is the ordinal number of the noise reduction cavities 2 arranged along the first direction 3, and r 1,n Let r be the diameter of the nth connecting hole 202 in the first direction 3. 1,1 The diameter of the first connecting hole 202 in the first direction 3.

[0056] The depth of chamber 201 along the first direction is determined according to formula 2: Gradually increasing, of which l 1,n Let l be the depth of the nth chamber 201 in the first direction 3. 1,1 The depth of the first chamber 201 in the first direction 3.

[0057] The diameter of the connecting hole 202 remains unchanged along the second direction.

[0058] The depth of chamber 201 along the second direction is determined according to formula 3: Gradually increasing, where m is the ordinal number of the noise reduction cavities 2 arranged along the second direction 4, l m,1 Let l be the depth of the m-th chamber 201 in the second direction 4. 1,1 The depth of the first chamber 201 in the first direction 3.

[0059] Specifically, the main body 1 of the device is also provided with a second array 6, such as Figure 2 As shown, the second array 6 is positioned away from the first array 5 so that the connecting holes 202 in the two arrays are located on opposite outer wall surfaces of the main body 1. Specifically, "the second array 6 is positioned away from the first array 5" means that the noise reduction cavity 2 of the second array 6 and the noise reduction cavity 2 of the first array 5 are arranged such that their chambers 201 are in contact with each other, while their connecting holes 202 are far apart.

[0060] Thus, by setting up the above-mentioned noise reduction cavities 2 on both sides of the main body 1, the utilization rate of the inner cavity of the noise reduction body can be improved, thereby increasing the number of noise reduction cavities 2 on a single main body 1 as much as possible to reduce the number of main bodies 1 required for the refrigerator, thereby reducing the impact on wind resistance.

[0061] Furthermore, the first array 5 and the second array 6 are centrally symmetrical with respect to the center of the device body 1.

[0062] Thus, since the volumes of the chambers 201 in the first array 5 are different, the space for arranging the chambers 201 on one side of the second array 6 is not uniform. When the first array 5 and the second array 6 are symmetrical about the center of the device body 1, the larger chamber 201 in the first array 5 can be placed against the smaller chamber 201 in the second array 6. That is, in the axial direction of the two noise reduction cavities 2 facing away from each other, the sum of the lengths of the chambers 201 in the first array 5 and the chambers 201 in the second array 6 in this direction is equal everywhere, thereby maximizing the structural utilization of the device body 1.

[0063] like Figures 2 to 4 As shown, in this embodiment, there are 3 noise reduction cavities 2 arranged along the first direction 3 and 5 noise reduction cavities 2 arranged along the second direction 4. That is, the noise reduction cavities 2 are divided into 3 layers, with 5 first arrays 5 and 5 second arrays 6 in each layer, for a total of 10 cavities per layer. The number of noise reduction cavities 2 is only for illustrative purposes, and those skilled in the art can adjust it according to actual needs. This embodiment does not limit it.

[0064] Specifically, the axial direction of several noise reduction cavities 2 is perpendicular to the extension direction of the ventilation duct, that is, the end face of the main body 1 exposed through the connecting hole 202 is parallel to the direction of airflow.

[0065] Thus, the above settings prevent airflow from directly impacting the connecting hole 202 and generating additional noise.

[0066] This embodiment also provides a refrigerator, which includes the refrigerator noise reduction device 1000 as described above.

[0067] Thus, by the above-mentioned configuration, the refrigerator noise reduction device 1000 simultaneously changes the volume of the sound-absorbing chamber 201 and the aperture of the connecting hole 202 of the connecting chamber 201, so that the noise reduction chamber 2 has a variety of combinations of connecting hole 202 apertures and chamber 201 volumes, thereby absorbing more different noise frequency bands, increasing the range of sound-absorbing frequency bands covered by the refrigerator noise reduction device 1000, and improving the noise absorption effect.

[0068] Specifically, the refrigerator noise reduction device 1000 is disposed in the air inlet channel 7 of the refrigerator, or the refrigerator noise reduction device 1000 is disposed in the air outlet channel 8, or preferably, the refrigerator noise reduction device 1000 is disposed in both the air inlet channel 7 and the air outlet channel 8.

[0069] Thus, the air inlet channel 7 and the air outlet channel 8 are areas where noise is relatively concentrated. Installing a refrigerator noise reduction device 1000 in these areas can improve the sound absorption efficiency.

[0070] Furthermore, the refrigerator includes multiple refrigerator noise reduction devices 1000, wherein the sum of the widths of the multiple refrigerator noise reduction devices 1000 in the cross-sectional width direction of the air inlet channel 7 is not greater than 30% of the cross-sectional width of the air inlet channel 7; or, the sum of the widths of the multiple refrigerator noise reduction devices 1000 in the cross-sectional width direction of the air outlet channel 8 is not greater than 30% of the cross-sectional width of the air outlet channel 8; or preferably, as shown in the figure. Figure 5 and Figure 6 As shown, the sum of the widths of the multiple refrigerator noise reduction devices 1000 in the cross-sectional width direction of the air inlet channel 7 and the air outlet channel 8 is no greater than 30% of the total width of the cross-section of the air inlet channel 7 and the air outlet channel 8.

[0071] Thus, since the refrigerator noise reduction device 1000 has a certain volume, its placement within the air inlet channel 7 or air outlet channel 8 will also occupy a certain amount of airflow space. Therefore, ensuring that the sum of the widths of the refrigerator noise reduction device 1000 in the cross-sectional width direction of the air inlet channel 7 or air outlet channel 8 does not exceed 30% can guarantee the smoothness of airflow.

[0072] Furthermore, when simultaneously installed in both the air inlet duct 7 and the air outlet duct 8, the number of refrigerator noise reduction devices 1000 is P, where P satisfies Formula 4: Wherein, D1 is the cross-sectional width of the air inlet channel 7, D2 is the cross-sectional width of the air outlet channel 8, and d is the width of the refrigerator noise reduction device 1000 in the cross-sectional direction of the air inlet channel 7 or the air outlet channel 8.

[0073] like Figure 5 and Figure 6 As shown, three refrigerator noise reduction devices 1000 are respectively installed in the air inlet channel 7 and the air outlet channel 8. However, this number is only for illustrative purposes and those skilled in the art can adjust it according to the actual situation. This embodiment does not limit it.

[0074] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A refrigerator noise reduction device, characterized in that, The refrigerator noise reduction device is installed inside the refrigerator's ventilation duct. The refrigerator noise reduction device includes a device body, and the device body is provided with multiple noise reduction cavities. Each noise reduction cavity includes a connected chamber and a connecting hole. The two axial ends of the connecting hole are respectively connected to the chamber and the ventilation duct. The diameters of the connecting holes of at least two noise reduction cavities are different, and the volumes of the chambers connected by the connecting holes with different diameters are different.

2. The refrigerator noise reduction device as described in claim 1, characterized in that, At least some of the noise reduction cavities are arranged in a straight line to form a set of noise reduction cavity modules, and the arrangement direction of the noise reduction cavities is a first direction; along the first direction, the aperture of the connecting hole of the plurality of noise reduction cavities in a single noise reduction cavity module gradually decreases, and the corresponding volume of the cavity gradually increases.

3. The refrigerator noise reduction device as described in claim 2, characterized in that, Multiple noise reduction cavity modules are arranged along a second direction perpendicular to the first direction to form a noise reduction cavity array.

4. The refrigerator noise reduction device as described in claim 3, characterized in that, The apertures of the connecting holes of the noise reduction cavity modules at the same height in the first direction are the same, and the corresponding cavities gradually increase along the second direction.

5. The refrigerator noise reduction device as described in claim 3, characterized in that, The main body of the device includes two noise reduction cavity arrays, the walls of the chambers of the two noise reduction cavity arrays abut each other, and the connecting holes of the two noise reduction cavity arrays are respectively arranged on the opposite outer walls of the main body of the device.

6. The refrigerator noise reduction device as described in claim 5, characterized in that, The two noise-reducing cavity arrays are centrally symmetrical with respect to the center of the device body.

7. The refrigerator noise reduction device as described in claim 1, characterized in that, The axial direction of the connecting hole is perpendicular to the extension direction of the ventilation duct.

8. A refrigerator, characterized in that, It includes the refrigerator noise reduction device as described in any one of claims 1-7.

9. The refrigerator as described in claim 8, characterized in that, The ventilation duct includes an air inlet channel and an air outlet channel for the refrigerator, and the refrigerator noise reduction device is installed in the air inlet channel and / or the air outlet channel.

10. The refrigerator as described in claim 9, characterized in that, The refrigerator includes a plurality of refrigerator noise reduction devices, wherein the sum of the widths of the plurality of refrigerator noise reduction devices in the direction of the width of the air inlet channel cross section is not greater than 30% of the width of the air inlet channel cross section; And / or, the sum of the widths of the plurality of refrigerator noise reduction devices in the direction of the cross-sectional width of the air outlet channel is not greater than 30% of the cross-sectional width of the air outlet channel.

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