Refrigerator cooling air duct noise reduction device and refrigerator including the same

Abstract

The utility model provides a refrigerator's cold storage air duct noise reduction device and including its refrigerator, the refrigerator includes the evaporimeter for refrigeration and the cold storage air duct of intercommunication in the refrigeration chamber, the evaporimeter is installed on the support plate, is equipped with the cold storage air duct on the support plate, the noise reduction device includes the sound absorbing material filling piece and the flow guide plate around the cold storage air duct and extend to the heat dissipation surface of evaporimeter, both ends of flow guide plate are connected to the support plate and the shell of refrigerator, the sound absorbing material filling piece is filled between the support plate and the shell of refrigerator, and the side surface of sound absorbing material filling piece is pasted in the side surface of flow guide plate opposite to the air current direction. The refrigerator's cold storage air duct noise reduction device and including its refrigerator, have realized the flow guide, improved the noise reduction effect again, and the flow guide plate and sound absorbing material filling piece do not occupy the space of cold storage air duct, do not influence the air inlet and outlet efficiency.

Description

Technical Field

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

[0002] As living standards improve, consumers have increasingly higher requirements for the noise levels of home appliances. While the noise from the refrigerator's compressor compartment is gradually decreasing, the noise from the refrigerator's cooling duct becomes more prominent. In the refrigerator's structure, a centrifugal fan is typically installed inside the cooling duct. The rotation of the centrifugal fan creates a negative pressure zone at the air inlet of the cooling duct. Under this negative pressure, the gas inside the cooling compartment is cooled by the evaporator and then drawn back into the refrigerator's cooling compartment through the cooling duct.

[0003] In the existing technology, the noise reduction solutions for refrigerated air duct modules (i.e., refrigerated air ducts, centrifugal fans and related surrounding structures) mainly include: 1. Setting vibration isolation structures at the connection points of centrifugal fans to isolate the transmission of vibration and thus reduce the noise generated by vibration; 2. Designing streamlined air ducts and airflow guiding designs to reduce airflow turbulence noise.

[0004] However, existing noise reduction solutions for refrigerated air duct modules have the following drawbacks:

[0005] 1. Placing sound-absorbing materials inside the air duct will occupy the space of the air duct, affect the efficiency of air intake and exhaust, cause changes in fan speed, and may cause greater noise.

[0006] 2. Reducing turbulent noise through flow guidance can only reduce some noticeable noise, and its impact on the overall noise level is limited. Furthermore, it has no effect on noise generated by mechanical vibration. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the prior art and provide a refrigerator refrigeration air duct noise reduction device and a refrigerator including the device.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A noise reduction device for a refrigerator's refrigeration air duct, the refrigerator including an evaporator for refrigeration and a refrigeration air duct communicating with the refrigerator compartment, the evaporator being mounted on a support plate, the refrigeration air duct being provided on the support plate, the inlet of the evaporator and the refrigeration air duct being sealed between the support plate and the refrigerator casing; the refrigeration air duct being used to transport the cold air generated by the evaporator to the refrigerator compartment;

[0010] The noise reduction device includes a guide plate surrounding the refrigeration air duct and extending toward the heat dissipation surface of the evaporator, and a sound-absorbing material filler. The two ends of the guide plate are connected to the support plate and the shell of the refrigerator. The sound-absorbing material filler is filled between the support plate and the shell of the refrigerator, and the side of the sound-absorbing material filler is attached to the side of the guide plate facing the airflow direction.

[0011] In this design, the refrigerated duct noise reduction device utilizes the aforementioned guide plate and sound-absorbing material filler. On one hand, the guide plate directs the airflow after the evaporator has cooled down, concentrating cold air, reducing energy consumption, and minimizing the impact of airflow on surrounding structures when entering the refrigerated duct, thus improving noise reduction. On the other hand, the sound-absorbing material filler is placed between the support plate and the refrigerator shell, with its sides adhering to the guide plate. This allows the filler to absorb mechanical vibrations from all directions, absorbing not only the mechanical vibrations from impacts on the support plate and shell but also the mechanical vibrations generated by the airflow impacting the guide plate, thereby reducing noise. This refrigerated duct noise reduction device achieves both airflow guidance and improved noise reduction, and the guide plate and sound-absorbing material filler do not occupy space in the refrigerated duct or affect airflow efficiency.

[0012] Preferably, the guide plate extends in an arc shape toward the edge of the heat dissipation surface of the evaporator.

[0013] In this design, the guide plate adopts an arc-shaped structure, which helps to reduce airflow impact and thus improve noise reduction. Extending the guide plate to the edge of the heat dissipation surface increases the guiding area and ensures that all heat dissipation and cooling airflow can be guided.

[0014] Preferably, the guide plate is provided with a plurality of small holes.

[0015] Compared to not having small holes on the guide plate, this solution sets several small holes on the guide plate, allowing noise to pass through the holes and be better absorbed by the sound-absorbing material. This isolates the sound transmission path and prevents the sound from being directly transmitted through the installation gaps between structural components.

[0016] Preferably, the guide plate includes a middle section surrounding the refrigerated air duct and side sections located on both sides of the middle section, with a plurality of small holes distributed on the sides of the two side sections.

[0017] In this design, the side sections absorb noise through sound-absorbing holes (i.e., small holes) and also absorb noise generated by mechanical vibration through sound-absorbing material fillers, thus absorbing the main energy of the noise; while the middle section absorbs noise generated by mechanical vibration; at the same time, this arrangement facilitates processing.

[0018] Preferably, the ratio of the total area of ​​all the holes to the side area of ​​the guide plate is not less than 70%.

[0019] In this solution, the above ratio is used to further increase the porosity (i.e., the ratio of the total area of ​​all small holes to the side area of ​​the guide plate), making the small holes absorb sound more fully and thus improving the noise reduction effect.

[0020] Preferably, the sound-absorbing material filler is made of a soft material.

[0021] In this solution, the sound-absorbing material filler is made of soft, elastic material, resulting in better sound absorption.

[0022] Preferably, the sound-absorbing material filler is polyurethane sound-absorbing cotton.

[0023] In this solution, polyurethane sound-absorbing cotton is used as the sound-absorbing material filler, which is the preferred sound-absorbing material and has a better sound absorption effect.

[0024] Preferably, the two ends of the guide plate are sealed to the support plate and the shell of the refrigerator.

[0025] In this solution, the above-mentioned settings prevent airflow from leaking through the connection gaps between the guide plate, support plate, and housing, thus avoiding noise generation and ensuring the guiding effect of the guide plate and the overall sound absorption effect.

[0026] Preferably, the guide plate is made of sheet metal.

[0027] In this design, the deflector is made of sheet metal to enhance its impact resistance.

[0028] A refrigerator, the refrigerator including the refrigeration air duct noise reduction device as described above.

[0029] In this design, the refrigerator utilizes the aforementioned refrigeration duct noise reduction device. Firstly, the guide plate directs the airflow after the evaporator has cooled down, concentrating cold air, reducing energy consumption, and minimizing the impact of airflow on surrounding structures when entering the refrigeration duct, thus improving noise reduction. Secondly, sound-absorbing material fillers are placed between the support plate and the refrigerator shell, with their sides adhering to the guide plate. This allows the sound-absorbing material fillers to absorb mechanical vibrations from all directions, absorbing not only the mechanical vibrations from impacts on the support plate and shell but also the mechanical vibrations generated by airflow impacting the guide plate, thereby reducing noise. This design achieves both airflow guidance and improved noise reduction, and the guide plate and sound-absorbing material fillers do not occupy space in the refrigeration duct, thus not affecting airflow efficiency.

[0030] The positive and progressive effects of this utility model are as follows: The refrigerator's refrigeration duct noise reduction device and the refrigerator including it, on the one hand, the guide plate can guide the airflow after the evaporator has cooled down, gather cold air, reduce energy consumption, and also reduce the impact of airflow on surrounding structures when entering the refrigeration duct, which is beneficial to the noise reduction effect; on the other hand, the sound-absorbing material filler is filled between the support plate and the refrigerator shell, and its side is attached to the guide plate, so that the sound-absorbing material filler can absorb mechanical vibrations in all directions, that is, it not only absorbs the mechanical vibrations of the support plate and shell under impact, but also absorbs the mechanical vibrations generated by the airflow impacting the guide plate, thereby reducing noise. It achieves both airflow guidance and improved noise reduction effect, and the guide plate and sound-absorbing material filler do not occupy the space of the refrigeration duct and do not affect the air intake and exhaust efficiency. Attached Figure Description

[0031] Figure 1 This is a half-sectional view of the entire assembly when the refrigeration air duct noise reduction device, as an embodiment of this utility model, is installed inside the shell of a refrigerator.

[0032] Figure 2 This is a schematic diagram of the structure of the refrigerated air duct noise reduction device according to an embodiment of the present invention. The refrigerator shell covering the surface of the sound-absorbing material filler has been removed from the figure.

[0033] Figure 3 This is a structural schematic diagram of the refrigerated air duct noise reduction device according to another embodiment of the present invention. The refrigerator shell covering the surface of the sound-absorbing material filler has been removed from the figure.

[0034] Explanation of reference numerals in the attached figures:

[0035] Evaporator 1

[0036] Refrigerated air duct 2

[0037] Refrigerated air duct inlet 21

[0038] Support plate 3

[0039] Refrigerator casing 4

[0040] Deflector 5

[0041] Small hole 51

[0042] Middle section 52

[0043] Side section 53

[0044] 6 sound-absorbing material fillers Detailed Implementation

[0045] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0046] Example 1

[0047] like Figures 1-3 As shown, this embodiment provides a refrigerator refrigeration duct noise reduction device. The refrigerator includes an evaporator 1 for refrigeration and a refrigeration duct 2 connected to the refrigerator compartment. The evaporator 1 is mounted on a support plate 3, and the support plate 3 is provided with the refrigeration duct 2. In this embodiment, the support member is a sheet metal structural member that can be bent and stamped, and the refrigeration duct 2 is a duct that is stamped and formed on the sheet metal structural member and protrudes from the plane of the sheet metal body.

[0048] The evaporator 1 and the inlet 21 of the refrigeration air duct are enclosed between the support plate 3 and the refrigerator shell 4. The refrigeration air duct 2 is equipped with a centrifugal fan (not shown in the figure) or other gas extraction equipment. When the centrifugal fan is working, a negative pressure is generated at the inlet 21 of the refrigeration air duct. Under the action of negative pressure, the cold air generated by the evaporator 1 is transported to the refrigerator compartment through the refrigeration air duct 2.

[0049] The noise reduction device includes a guide plate 5 extending around the refrigeration air duct 2 and toward the heat dissipation surface of the evaporator 1, and a sound-absorbing material filler 6. The guide plate 5 is a sheet metal part or a thin steel strip plate. The two ends of the guide plate 5 are connected to the support plate 3 and the refrigerator shell 4, that is, the two ends of the guide plate 5 are perpendicularly connected to the support plate 3 and the refrigerator shell 4. The sound-absorbing material filler 6 is a soft material with sound absorption function. It is presented as a block structure and is filled between the support plate 3 and the refrigerator shell 4. The side of the sound-absorbing material filler 6 is attached to the side of the guide plate 5 facing the airflow direction. That is, the side of the sound-absorbing material filler 6 has the same contour shape as the side of the guide plate 5.

[0050] This refrigerated air duct noise reduction device, through the aforementioned guide plate 5 and sound-absorbing material filler 6, serves two purposes. Firstly, the guide plate 5 directs the airflow after the evaporator 1 has cooled down, concentrating cold air, reducing energy consumption, and minimizing the impact of airflow into the refrigerated air duct 2 on surrounding structures, thus improving noise reduction. Secondly, the sound-absorbing material filler 6 fills the space between the support plate 3 and the refrigerator shell 4, with its side attached to the guide plate 5. This allows the sound-absorbing material filler 6 to absorb mechanical vibrations from all directions, absorbing not only the mechanical vibrations from the impact on the support plate 3 and shell, but also the mechanical vibrations generated by the airflow impacting the guide plate 5, thereby reducing noise. This refrigerated air duct noise reduction device achieves both airflow guidance and improved noise reduction, and the guide plate 5 and sound-absorbing material filler 6 do not occupy space in the refrigerated air duct 2, nor do they affect the airflow efficiency.

[0051] Furthermore, the guide plate 5 extends in an arc shape towards the edge of the heat dissipation surface of the evaporator 1. Compared with the straight V-shaped guide plate 5, the guide plate 5 in this embodiment adopts an arc structure, and the arc change presents a gradual process, which is conducive to reducing airflow impact and thus improving the noise reduction effect; extending the guide plate 5 to the edge of the heat dissipation surface increases the guiding area and ensures that all heat dissipation and cooling airflow can be guided.

[0052] Among them, such as Figure 1 and Figure 3 As shown, the guide plate 5 has several small holes 51. In other embodiments, the guide plate 5 may not have small holes 51, and noise can be reduced by absorbing mechanical vibrations through the sound-absorbing material filler 6. However, compared to the guide plate 5 without small holes 51, where noise is absorbed by the sound-absorbing material filler 6 through the mechanical vibration of airflow impacting the guide plate 5, this embodiment provides several small holes 51 on the guide plate 5, allowing noise to pass through the small holes 51 and be better absorbed by the sound-absorbing material, thus isolating the sound transmission path and preventing sound from being directly transmitted through the mounting gaps between structural components.

[0053] In this embodiment, in order to facilitate processing and save manufacturing costs, all the holes 51 opened on the guide plate 5 are of equal size and are evenly spaced.

[0054] Among them, such as Figure 3 As shown, the guide plate 5 includes a middle section 52 surrounding the refrigerated air duct 2 and side sections 53 located on both sides of the middle section 52. Several small holes 51 are distributed on the sides of the two side sections 53. Since the noise energy is stronger in the side sections 53, the side sections 53 absorb noise through both the sound-absorbing holes (i.e., small holes 51) and the noise generated by mechanical vibration through the sound-absorbing material filler 6, effectively absorbing the main energy of the noise; while the middle section 52 absorbs the noise generated by mechanical vibration; at the same time, this arrangement is convenient for processing. However, in other embodiments, small holes 51 can also be opened on the entire side of the guide plate 5 to ensure more sufficient sound absorption, but doing so will increase the processing cost.

[0055] The ratio of the total area of ​​all the small holes 51 to the side area of ​​the guide plate 5 is not less than 70%. By adopting this ratio, the porosity (i.e., the ratio of the total area of ​​all the small holes 51 to the side area of ​​the guide plate 5) is further improved, the small holes 51 absorb sound more fully, and thus improve the noise reduction effect.

[0056] In this embodiment, the sound-absorbing material filler 6 is made of a soft material, which is elastic and has a better sound absorption effect. Preferably, the sound-absorbing material filler 6 is polyurethane sound-absorbing cotton, which has an even better sound absorption effect.

[0057] The baffle 5 is sealed at both ends to the support plate 3 and the refrigerator shell 4 to prevent airflow from leaking through the gaps between the baffle 5 and the support plate 3 and the shell, thus preventing noise and ensuring the baffle 5's guiding effect and overall sound absorption effect. Various sealing methods can be used, such as applying sealant to the joints to create a seal.

[0058] In this embodiment, the guide plate 5 is made of sheet metal to enhance its impact resistance.

[0059] Example 2

[0060] This embodiment provides a refrigerator including a refrigeration duct noise reduction device as described in Embodiment 1. By employing the refrigeration duct noise reduction device as described in Embodiment 1, the refrigerator achieves two main benefits: firstly, the guide plate 5 guides the airflow after the evaporator 1 has cooled down, concentrating cold air, reducing energy consumption, and minimizing the impact of airflow into the refrigeration duct 2 on surrounding structures, thus improving noise reduction; secondly, the sound-absorbing material filler 6 is filled between the support plate 3 and the refrigerator shell 4, with its side attached to the guide plate 5, allowing the sound-absorbing material filler 6 to absorb mechanical vibrations from all directions. This means it absorbs not only the mechanical vibrations from the impact on the support plate 3 and shell, but also the mechanical vibrations generated by the airflow impacting the guide plate 5, thereby reducing noise. This achieves both airflow guidance and improved noise reduction, and the guide plate 5 and sound-absorbing material filler 6 do not occupy space in the refrigeration duct 2, thus not affecting airflow efficiency.

[0061] 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 noise reduction device for a refrigerator's refrigeration air duct, the refrigerator comprising an evaporator for refrigeration and a refrigeration air duct communicating with a refrigerator compartment, the evaporator being mounted on a support plate, the refrigeration air duct being provided on the support plate, and the inlets of the evaporator and the refrigeration air duct being sealed between the support plate and the refrigerator casing; the refrigeration air duct being used to transport the cold air generated by the evaporator to the refrigerator compartment; characterized in that, The noise reduction device includes a guide plate surrounding the refrigeration air duct and extending toward the heat dissipation surface of the evaporator, and a sound-absorbing material filler. The two ends of the guide plate are connected to the support plate and the shell of the refrigerator. The sound-absorbing material filler is filled between the support plate and the shell of the refrigerator, and the side of the sound-absorbing material filler is attached to the side of the guide plate facing the airflow direction.

2. The cold air duct noise reduction device of the refrigerator according to claim 1, wherein, The guide plate extends in an arc shape toward the edge of the heat dissipation surface of the evaporator.

3. The refrigerator refrigeration air duct noise reduction device as described in claim 1, characterized in that, The guide plate has several small holes.

4. The refrigerator refrigeration air duct noise reduction device as described in claim 3, characterized in that, The guide plate includes a middle section surrounding the refrigerated air duct and side sections located on both sides of the middle section, with a plurality of small holes distributed on the sides of the two side sections.

5. The refrigerator refrigeration air duct noise reduction device as described in claim 3, characterized in that, The ratio of the total area of ​​all the holes to the side area of ​​the guide plate is not less than 70%.

6. The refrigerator refrigeration air duct noise reduction device as described in claim 1, characterized in that, The sound-absorbing material filler is made of a soft material.

7. The refrigerator refrigeration air duct noise reduction device as described in claim 6, characterized in that, The sound-absorbing material filler is polyurethane sound-absorbing cotton.

8. The refrigerator refrigeration air duct noise reduction device as described in claim 1, characterized in that, The two ends of the guide plate are sealed to the support plate and the shell of the refrigerator.

9. The refrigerator refrigeration air duct noise reduction device as described in claim 1, characterized in that, The guide plate is made of sheet metal.

10. A refrigerator, characterized in that, The refrigerator includes a noise reduction device for the refrigeration air duct as described in any one of claims 1-9.

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