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 who communicates in the refrigeration chamber, the evaporimeter is installed on the support board, is equipped with the cold storage air duct on the support board, the noise reduction device includes the flow guide plate and sound absorption chamber structure around the cold storage air duct and to the heat dissipation surface extension of evaporimeter, the flow guide plate and sound absorption chamber structure all are equipped between the support board and the shell of refrigerator, sound absorption chamber structure is pasted to the side surface of flow guide plate just for the air current direction, be equipped with a plurality of small holes on the flow guide plate, sound absorption chamber structure is divided into a plurality of sound absorption compartments, and each sound absorption compartment is communicated with at least one small hole. The refrigerator's cold storage air duct noise reduction device and including its refrigerator, have realized the flow guide, improved the noise reduction effect, improved the noise reduction effect of refrigerator, and the flow guide plate and sound absorption chamber structure do not occupy the space of cold storage air duct, do not influence the air inlet and outlet efficiency, are favorable to the refrigeration effect of refrigerator.

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 and a sound-absorbing chamber structure that surround the refrigeration air duct and extend toward the heat dissipation surface of the evaporator. The guide plate and the sound-absorbing chamber structure are both disposed between the support plate and the shell of the refrigerator. The sound-absorbing chamber structure is attached to the side of the guide plate facing the airflow direction.

[0011] The guide plate is provided with a number of small holes, and the sound-absorbing chamber structure is divided into a number of sound-absorbing compartments, each of which is connected to at least one of the small holes.

[0012] In this solution, the refrigerated air duct noise reduction device utilizes the aforementioned guide plate and sound-absorbing chamber structure. 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 air duct, thus improving noise reduction. On the other hand, noise is absorbed by the connected sound-absorbing chamber through several small holes, isolating sound transmission along the sound path and preventing direct sound transmission through the installation gaps between structural components, thereby reducing noise. This refrigerated air duct noise reduction device achieves both airflow guidance and improved noise reduction, and the guide plate and sound-absorbing chamber structure do not occupy space in the refrigerated air duct and do not affect airflow efficiency.

[0013] Preferably, the guide plate extends in an arc shape toward the edge of the heat dissipation surface of the evaporator.

[0014] 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.

[0015] Preferably, the width of each of the sound-absorbing chambers is equal perpendicular to the airflow direction.

[0016] In this solution, the above-mentioned setup facilitates processing and allows for adjustment of the length of each sound-absorbing chamber along the sound propagation path according to different noise frequencies, thereby effectively absorbing noise of different frequencies.

[0017] Preferably, the volume of each of the sound-absorbing compartments is determined by the formula:

[0018] Sure;

[0019] In the formula, The frequency at which the cold air generates noise in the refrigeration duct. c is the speed of sound of the cold air in the refrigeration duct, and S is the area of ​​the small hole. r is the radius of the small hole, V is the volume of the sound-absorbing chamber, t is the thickness of the guide plate, and d is the diameter of the small hole.

[0020] In this solution, the above formula allows for the design of different sound-absorbing chamber sizes based on the noise frequency range corresponding to higher decibel levels. Each sound-absorbing chamber corresponds to a frequency with a certain noise decibel level, and different sound-absorbing chambers correspond to frequencies with different noise decibel levels. This effectively absorbs noise with higher decibel levels, thereby improving the noise reduction effect.

[0021] Preferably, the sides of all the sound-absorbing chambers away from the guide plate are straight surfaces on the same horizontal plane, and the contact side of the sound-absorbing chamber that is in contact with the guide plate is set according to the frequency range of the noise generated by the cold air and the formula; the side of the guide plate is set to have the same curvature as the contact side.

[0022] In this design, all sound-absorbing compartments with sides away from the guide plate are designed as straight surfaces on the same horizontal plane. This results in sound-absorbing compartments of different volumes exhibiting different lengths along the sound propagation path. Furthermore, when the contact surfaces between the sound-absorbing compartments and the guide plate are determined based on the frequency range and formula of the noise generated by the cold air, the contact surfaces of different sound-absorbing compartments form curved surfaces corresponding to different noise frequencies, effectively absorbing noise from different frequency ranges. Correspondingly, the guide plate, by employing the same curved surface as all contact surfaces, facilitates better airflow guidance.

[0023] Preferably, each of the sound-absorbing chambers is connected to one of the small holes, and all the small holes are equally spaced and located at the same height position of the guide plate.

[0024] The above-mentioned setup in this solution is simple in structure and easy to manufacture.

[0025] Preferably, the two ends of the guide plate are sealed to the support plate and the shell of the refrigerator.

[0026] 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.

[0027] Preferably, the two ends of the sound-absorbing chamber structure are sealed to the support plate and the shell of the refrigerator.

[0028] In this solution, the above-mentioned design prevents airflow from leaking through the connection gaps between the sound-absorbing chamber structure and the support plate and shell, thus avoiding noise generation and ensuring the sound absorption effect of the sound-absorbing chamber structure.

[0029] Preferably, the guide plate is made of sheet metal.

[0030] In this design, the deflector is made of sheet metal to enhance its impact resistance.

[0031] A refrigerator, the refrigerator including the refrigeration air duct noise reduction device as described above.

[0032] In this design, the refrigerator employs 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 as it enters the refrigeration duct, thus improving noise reduction. Secondly, noise is absorbed by the connected sound-absorbing chamber through several small holes, isolating sound transmission along its path and preventing direct transmission through the installation gaps between structural components, thereby reducing noise. This refrigeration duct noise reduction device achieves both airflow guidance and improved noise reduction, enhancing the refrigerator's overall noise reduction performance. Furthermore, the guide plate and sound-absorbing chamber structure do not occupy space in the refrigeration duct and do not affect airflow efficiency, further contributing to the refrigerator's refrigeration effect.

[0033] 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 the surrounding structure when entering the refrigeration duct, which is beneficial to the noise reduction effect; on the other hand, noise passes through several small holes and is absorbed by the sound-absorbing chamber connected to them, isolating the sound transmission path and preventing sound from being directly transmitted through the installation gaps between structural components, thereby reducing noise. This refrigeration duct noise reduction device not only achieves airflow guidance but also improves the noise reduction effect, thus improving the refrigerator's noise reduction performance; furthermore, the guide plate and sound-absorbing chamber structure do not occupy the space of the refrigeration duct and do not affect the air intake and exhaust efficiency, which is beneficial to the refrigerator's refrigeration effect. Attached Figure Description

[0034] 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.

[0035] 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 chamber structure has been removed from the figure.

[0036] Figure 3 This is a schematic diagram of the refrigerated air duct noise reduction device from another angle according to an embodiment of the present invention. The refrigerator shell covering the surface of the sound-absorbing chamber structure has been removed from the diagram.

[0037] Explanation of reference numerals in the attached figures:

[0038] Evaporator 1

[0039] Refrigerated air duct 2

[0040] Refrigerated air duct inlet 21

[0041] Support plate 3

[0042] Refrigerator casing 4

[0043] Deflector 5

[0044] Small hole 51

[0045] Sound-absorbing chamber structure 6

[0046] 61 sound-absorbing partitions

[0047] Airflow direction A Detailed Implementation

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

[0049] Example 1

[0050] 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.

[0051] 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.

[0052] The noise reduction device includes a guide plate 5 extending around the refrigerated air duct 2 and toward the heat dissipation surface of the evaporator 1, and a sound-absorbing chamber structure 6. The guide plate 5 is a sheet metal part or a thin steel strip plate. Both ends of the guide plate 5 are connected to the support plate 3 and the refrigerator shell 4, that is, both ends of the guide plate 5 are perpendicularly connected to the support plate 3 and the refrigerator shell 4. The sound-absorbing chamber structure 6 can be made of metal or non-metal materials. The sound-absorbing chamber structure 6 is divided into several sound-absorbing compartments 61. The sound-absorbing chamber structure 6 as a whole is connected to the support plate 3 and the refrigerator shell 4 at both ends, forming a closed cavity structure. The sound-absorbing chamber structure 6 is attached to the side of the guide plate 5 facing the airflow direction A. That is, the attached side of the sound-absorbing chamber structure 6 is designed according to the side shape of the guide plate 5. The guide plate 5 is provided with several small holes 51, and each sound-absorbing compartment 61 is connected to at least one small hole 51.

[0053] This refrigerated air duct noise reduction device, through the aforementioned guide plate 5 and sound-absorbing chamber structure 6, serves two purposes. First, 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 on surrounding structures when entering the refrigerated air duct 2, thus improving noise reduction. Second, noise passes through several small holes 51 and is absorbed by the connected sound-absorbing chamber 61, isolating sound transmission along the sound transmission path and preventing sound from directly transmitting through the installation gaps between structural components, 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 chamber structure 6 do not occupy the space of the refrigerated air duct 2, nor do they affect the air intake and exhaust efficiency.

[0054] 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.

[0055] Among them, such as Figure 2 As shown, the width of each sound-absorbing chamber 61 perpendicular to the airflow direction A is equal. In other embodiments, sound-absorbing chambers 61 with unequal widths can also be selected according to the needs of sound absorption effect; however, compared with the unequal width design, this embodiment adopts an equal width design, which is convenient for processing and also convenient for adjusting the length of each sound-absorbing chamber 61 along the sound propagation path according to different noise frequencies, so as to effectively absorb noise of different frequencies.

[0056] In this embodiment, the volume of each sound-absorbing compartment 61 is determined by the following formula:

[0057] Sure;

[0058] In the formula, The frequency at which the cold air generates noise in the refrigeration duct 2. c is the speed of sound of the cold air in the refrigeration duct 2, and S is the area of ​​the small hole 51. r is the radius of the small hole 51, V is the volume of the sound-absorbing chamber 61, t is the thickness of the guide plate 5, and d is the diameter of the small hole 51.

[0059] Using the above formula, the volume of different sound-absorbing chambers 61 can be designed according to the noise frequency range corresponding to higher decibel levels. That is, each sound-absorbing chamber 61 corresponds to a frequency with a certain noise decibel level, and different sound-absorbing chambers 61 correspond to frequencies with different noise decibel levels. For example, in the noise spectrum, frequencies with higher decibel levels include f1, f2, f3, etc. The volume V1 of the first sound-absorbing chamber 61 is calculated based on f1 and the above formula; the volume V2 of the second sound-absorbing chamber 61 is calculated based on f2 and the above formula; the volume V3 of the third sound-absorbing chamber 61 is calculated based on f3 and the above formula, and so on. In this way, each sound-absorbing chamber 61 is designed according to different frequencies, effectively absorbing noise of different frequencies, thereby improving the noise reduction effect.

[0060] Among them, such as Figure 2 As shown, the sides of all sound-absorbing chambers 61 away from the guide plate 5 are straight surfaces on the same horizontal plane. The contact side of the sound-absorbing chamber 61 that is in contact with the guide plate 5 is set according to the frequency range and formula of the noise generated by the cold air. The side of the guide plate 5 is set to have the same curved surface as the contact side.

[0061] In this structural design, all sound-absorbing chambers 61 with sides away from the guide plate 5 are designed as straight surfaces on the same horizontal plane. This results in sound-absorbing chambers 61 of different volumes exhibiting different lengths along the sound propagation path. Furthermore, when the contact surfaces of the sound-absorbing chambers 61 and the guide plate 5 are determined based on the frequency range and formula of the noise generated by the cold air, the contact surfaces of different sound-absorbing chambers 61 form curved surfaces corresponding to different noise frequencies, effectively absorbing noise from different frequency ranges. Correspondingly, the guide plate 5, by employing the same curved surface as all contact surfaces, facilitates better airflow guidance.

[0062] In this embodiment, as Figure 3 As shown, each sound-absorbing chamber 61 is connected to a small hole 51, and all small holes 51 are equally spaced and located at the same height as the guide plate 5. In other embodiments, each sound-absorbing chamber 61 is connected to multiple small holes 51, and the spacing and distribution of the small holes 51 can be adjusted according to the desired effect. However, this embodiment adopts the above-mentioned single-hole equally spaced arrangement, which is simple in structure and easy to process.

[0063] The two ends of the guide plate 5 are sealed to the support plate 3 and the refrigerator shell 4 to prevent airflow from leaking from the connection gap between the guide plate 5 and the support plate 3 and the shell, thus preventing noise and ensuring the guiding effect of the guide plate 5 and the overall sound absorption effect.

[0064] Similarly, the two ends of the sound-absorbing chamber structure 6 can also be sealed to the support plate 3 and the refrigerator shell 4 to prevent airflow from leaking from the connection gap between the sound-absorbing chamber structure 6 and the support plate 3 and the shell, thus ensuring the sound absorption effect of the sound-absorbing chamber structure 6.

[0065] There are various specific sealing methods, such as applying sealant to the joint gaps to create a sealing effect.

[0066] In this embodiment, the guide plate 5 is made of sheet metal to enhance its impact resistance.

[0067] Example 2

[0068] This embodiment provides a refrigerator that includes a refrigeration duct noise reduction device as described in Embodiment 1. By employing this device, the refrigerator achieves several advantages: 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, noise is absorbed by the sound-absorbing chamber 61 connected to several small holes 51, isolating sound transmission along the sound path and preventing direct transmission through the mounting holes between structural components, thereby reducing noise. This refrigeration duct noise reduction device achieves both airflow guidance and improved noise reduction, enhancing the refrigerator's overall noise reduction performance; furthermore, the guide plate 5 and the sound-absorbing chamber structure 6 do not occupy space in the refrigeration duct 2, do not affect airflow efficiency, and contribute to the refrigerator's refrigeration effect.

[0069] 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 and a sound-absorbing chamber structure that surround the refrigeration air duct and extend toward the heat dissipation surface of the evaporator. The guide plate and the sound-absorbing chamber structure are both disposed between the support plate and the shell of the refrigerator. The sound-absorbing chamber structure is attached to the side of the guide plate facing the airflow direction. The guide plate is provided with a number of small holes, and the sound-absorbing chamber structure is divided into a number of sound-absorbing compartments, each of which is connected to at least one of the small holes.

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 cold air duct noise reduction apparatus of the refrigerator according to claim 1, wherein Each of the sound-absorbing chambers has an equal width perpendicular to the airflow direction.

4. The cold air duct noise reduction device of the refrigerator according to claim 3, wherein The volume of each of the sound absorbing compartments is determined by the formula: determined; In the formula, The frequency at which the cold air generates noise in the refrigeration duct. c is the speed of sound of the cold air in the refrigeration duct, and S is the area of ​​the small hole. r is the radius of the small hole, V is the volume of the sound-absorbing chamber, t is the thickness of the guide plate, and d is the diameter of the small hole.

5. The refrigerator cold air duct noise reduction apparatus of claim 4, wherein All the sound-absorbing chambers on the side away from the guide plate are straight surfaces on the same horizontal plane, and the contact side of the sound-absorbing chamber that is in contact with the guide plate is set according to the frequency range of the noise generated by the cold air and the formula. The side of the deflector is configured to have the same curvature as the contact side.

6. The refrigerator cold air duct noise reduction apparatus of claim 5, wherein Each of the sound-absorbing chambers is connected to a small hole, and all the small holes are equally spaced and located at the same height position on the guide plate.

7. The refrigerator cold air duct noise reduction apparatus of claim 1, wherein The two ends of the guide plate are sealed to the support plate and the shell of the refrigerator.

8. The cold air duct noise reduction apparatus of the refrigerator according to claim 1, wherein, The two ends of the sound-absorbing chamber structure are sealed and connected to the support plate and the shell of the refrigerator.

9. The cold air duct noise reduction apparatus of the refrigerator according to claim 1, wherein, The guide plate is made of sheet metal.

10. A refrigerator characterized by comprising: 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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