Air inlet noise reduction structure and fume hood and extractor hood comprising same

Abstract

This utility model provides an air intake noise reduction structure and a smoke collection hood and range hood including the same. The air intake noise reduction structure includes a driving part and a baffle connected to the driving part. The baffle adjusts the air intake area through the driving part. The air intake noise reduction structure also includes: a noise reduction part disposed on the side of the baffle away from the air inlet; and sound-permeable holes, with a plurality of sound-permeable holes formed on the baffle, which penetrate the baffle and communicate with the noise reduction part. By setting the noise reduction part on the side of the baffle away from the air inlet, noise within the cavity where the air intake noise reduction structure is located is absorbed, preventing noise from radiating outward from the air inlet. In addition, the sound-permeable holes on the baffle allow noise at the air inlet to be transmitted to the noise reduction part and effectively absorbed when the baffle adjusts the air intake area, effectively reducing air intake noise.

Description

Technical Field

[0001] This utility model specifically relates to an air intake noise reduction structure and a smoke collection hood and range hood containing the same. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. As people's quality of life and health awareness improve, consumers are placing increasingly higher demands on the smoke extraction effect of range hoods.

[0003] Currently, to ensure the effective extraction of cooking fumes from range hoods, which generate a large amount of oil fumes during cooking, the airflow velocity at the hood's inlet is typically increased. There are generally two ways to increase the airflow velocity at the inlet: one is to keep the inlet area constant while increasing the air volume of the internal fan system; the other is to keep the air volume of the internal fan system constant while decreasing the inlet area. The advantage of the second method over the first is that it consumes less power from the fan system to achieve the same airflow velocity. However, increasing the inlet velocity, due to the increased airflow or reduced inlet area, will increase the internal noise of the range hood; the increased airflow velocity will also increase the intake noise, both of which are detrimental to the user experience. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology in that the intake noise and internal noise of the range hood are large when the amount of oil fumes is large, and to provide an intake noise reduction structure and a smoke collection hood and range hood including the structure.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An air intake noise reduction structure includes a driving unit and a baffle connected to the driving unit. The baffle adjusts the air intake area through the driving unit. The air intake noise reduction structure further includes:

[0007] A noise reduction unit is disposed on the side of the baffle away from the air inlet;

[0008] The baffle plate has a plurality of sound-permeable holes, which penetrate the baffle plate and are connected to the noise reduction part.

[0009] In this solution, a noise reduction section is installed on the side of the baffle away from the air inlet to absorb noise within the cavity where the noise reduction structure is located, thus preventing noise from radiating outward from the air inlet. Additionally, sound-permeable holes are provided on the baffle to transmit noise from the air inlet to the noise reduction section for effective absorption when the air inlet area is adjusted, thereby effectively reducing intake noise.

[0010] Preferably, the sound-transmitting hole is a circular hole, and the opening diameter of the sound-transmitting hole ranges from 1 to 2 mm.

[0011] In this solution, the above-mentioned settings facilitate the transmission of noise from the air inlet to the noise reduction section through the baffle, while avoiding excessively large sound-permeable holes that could affect the aerodynamic performance of the baffle.

[0012] Preferably, the opening area of ​​the plurality of sound-permeable holes accounts for 2-5% of the area of ​​the baffle.

[0013] In this solution, the above settings are used to avoid the aerodynamic performance of the baffle being affected by an excessively large opening area.

[0014] Preferably, a plurality of the sound-permeable holes are arranged in an array along the length and width directions of the baffle, and adjacent sound-permeable holes are spaced apart.

[0015] In this solution, by setting up the above, compared to the case where the density of sound-permeable holes in some parts of the baffle is large while the rest of the baffle is not permeable, the sound-permeable holes arrayed along the length and width of the baffle can be evenly distributed in different positions of the baffle, improving the uniformity of noise reduction and avoiding the situation where the baffle is not permeable in some parts, resulting in large local air intake noise.

[0016] Preferably, the spacing between two adjacent sound-permeable holes is 5-15 mm.

[0017] In this solution, the above settings are used to avoid situations where the gap between two adjacent sound-permeable holes is too large, thus failing to effectively transmit intake noise.

[0018] Preferably, the drive unit includes a drive motor, the output shaft of the drive motor is a telescopic rod, one end of the drive motor is hinged to the outer edge of the baffle through the output shaft, the other end of the drive motor is disposed away from the baffle, and the outer edge of the baffle away from the output shaft of the drive motor is hinged to the bottom of the air inlet cavity of the range hood.

[0019] In this solution, the angle of the baffle is adjusted by the above settings, thereby adjusting the air intake area of ​​the baffle.

[0020] Preferably, the noise reduction part is sound-absorbing cotton.

[0021] In this solution, the above-mentioned settings effectively absorb the noise inside the cavity where the air intake noise reduction structure is located, as well as the intake noise transmitted through the sound-permeable holes.

[0022] Preferably, the thickness of the sound-absorbing cotton is greater than the thickness of the baffle.

[0023] In this solution, the noise reduction effect is improved by increasing the thickness of the sound-absorbing cotton through the above settings, and there is no need to worry about the sound-absorbing cotton affecting the aerodynamic performance of the baffle.

[0024] A smoke collection hood includes an air inlet noise reduction structure as described above, wherein the air inlet noise reduction structure is disposed at the air inlet of the smoke collection hood.

[0025] In this solution, the smoke hood includes the aforementioned air intake noise reduction structure, which effectively absorbs noise inside the smoke hood without affecting the aerodynamic performance of the baffle, i.e., without affecting the air intake performance of the smoke hood, and prevents noise inside the smoke hood from radiating outward, while reducing the air intake noise of the smoke hood.

[0026] A range hood comprising a smoke collection hood as described above.

[0027] In this design, the range hood includes the aforementioned smoke collection hood. When absorbing large amounts of cooking fumes, the noise generated by the reduced air intake area is absorbed by the noise reduction unit within the smoke collection hood, preventing outward radiation. Simultaneously, when adjusting the air intake area using the baffle of the smoke collection hood, the noise reduction unit does not affect the baffle's aerodynamic performance and can indirectly increase the gas flow rate, improving the efficiency of fumes absorption. Furthermore, the sound-permeable holes in the baffle, in conjunction with the noise reduction unit, can also absorb intake noise, achieving effective fume absorption and noise reduction even under conditions of large amounts of cooking fumes.

[0028] The positive and progressive effects of this invention are as follows: By setting a noise reduction part on the side of the baffle away from the air inlet, this invention absorbs noise within the cavity where the noise reduction structure is located, preventing noise from radiating outward from the air inlet. Furthermore, sound-permeable holes are provided on the baffle so that when the air inlet area is adjusted, noise from the air inlet is transmitted through these holes to the noise reduction part for effective absorption, thus effectively reducing intake noise. Attached Figure Description

[0029] Figure 1 This is a perspective view of a range hood according to a preferred embodiment of the present invention.

[0030] Figure 2 This is a perspective view of a smoke collection hood according to a preferred embodiment of the present invention.

[0031] Figure 3 This is a front view of a preferred embodiment of the smoke collection hood of this utility model.

[0032] Figure 4 for Figure 3 AA sectional view.

[0033] Explanation of reference numerals in the attached figures:

[0034] Drive Unit 1

[0035] Drive motor 11

[0036] Output shaft 12

[0037] baffle 2

[0038] Noise Reduction Unit 3

[0039] 21 sound-permeable holes

[0040] Smoke hood 4 Detailed Implementation

[0041] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0042] This embodiment provides an air intake noise reduction structure, the specific structure of which is as follows: Figure 2 , Figure 3 and Figure 4 As shown, the air intake noise reduction structure includes a drive unit 1 and a baffle 2 connected to the drive unit 1. The baffle 2 adjusts the air intake area through the drive unit 1. The air intake noise reduction structure also includes:

[0043] Noise reduction unit 3 is located on the side of the baffle 2 away from the air inlet;

[0044] Sound-permeable holes 21 are provided on the baffle 2. The sound-permeable holes 21 penetrate the baffle 2 and are connected to the noise reduction part 3.

[0045] Specifically, the baffle 2 is a rectangular plate with a flat surface. The baffle 2 is driven by the drive unit 1 to move closer to or further away from the air inlet of the cavity where the air intake noise reduction structure is located, thereby adjusting the air intake area. This is existing technology and will not be elaborated on here. A noise reduction unit 3 is provided on the side of the baffle 2 facing away from the air inlet. It can be understood that the air intake noise reduction structure is located inside the cavity, and the noise reduction unit 3 is positioned away from the air inlet to absorb noise within the cavity where the air intake noise reduction structure is located, preventing noise from radiating outwards from the air inlet.

[0046] In addition, in this embodiment, by opening a sound-permeable hole 21 on the baffle 2, the sound-permeable hole 21 penetrates the baffle 2 and communicates with the noise reduction part 3, so that when the baffle 2 adjusts the air intake area, the noise at the air intake is transmitted to the noise reduction part 3 through the sound-permeable hole 21 and effectively absorbed, thereby effectively reducing the intake noise.

[0047] In this embodiment, the sound-transmitting hole 21 is a circular hole, and the opening diameter of the sound-transmitting hole 21 ranges from 1 to 2 mm.

[0048] Specifically, the sound-permeable hole 21 is a round hole. Compared with other shapes of holes, such as rectangular holes or trapezoidal holes, the circumference of the round hole is smooth, and the noise flowing into the round hole from different directions is smoother and without obvious resistance, so that the noise at the air inlet can be transmitted to the noise reduction part 3 through the baffle 2. At the same time, by limiting the diameter of the sound-permeable hole, the sound-permeable hole 21 is prevented from being too large and affecting the aerodynamic performance of the baffle 2.

[0049] In this embodiment, the opening area of ​​several sound-permeable holes 21 accounts for 2-5% of the area of ​​baffle 2. By limiting the proportion of the opening area of ​​several sound-permeable holes 21 to the area of ​​baffle 2, the aerodynamic performance of baffle 2 is avoided from being affected by the excessively large opening area.

[0050] Furthermore, in this embodiment, a plurality of sound-permeable holes 21 are arranged in an array along the length and width directions of the baffle 2, and adjacent sound-permeable holes 21 are spaced apart.

[0051] Specifically, the baffle 2 is a rectangular plate with a plurality of sound-permeable holes 21 arranged in an array along the length and width directions of the baffle 2. This ensures that the sound-permeable holes 21 are evenly distributed at various positions on the baffle 2. Compared to the case where the density of the sound-permeable holes 21 is large in some parts of the baffle 2 while the remaining parts of the baffle 2 are not perforated, the sound-permeable holes 21 arranged in an array along the length and width directions of the baffle 2 can be evenly distributed at different positions of the baffle 2. This effectively transmits the air intake noise at different positions of the baffle 2 to the noise reduction part 3, and the noise reduction part 3, which is away from the air inlet of the baffle 2, absorbs the air intake noise, improving the uniformity of noise reduction and avoiding the situation where the baffle 2 is not perforated in some parts, resulting in a large local air intake noise.

[0052] In this embodiment, the spacing between two adjacent sound-permeable holes 21 is 5-15mm. By limiting the spacing between two adjacent sound-permeable holes 21, the situation where the gap between two adjacent sound-permeable holes 21 is too large, and the intake noise is located between the two adjacent sound-permeable holes 21 and cannot be effectively transmitted, is avoided.

[0053] In this embodiment, the drive unit 1 includes a drive motor 11, the output shaft 12 of the drive motor 11 is a telescopic rod, one end of the drive motor 11 is hinged to the outer edge of the baffle 2 through the output shaft 12, and the other end of the drive motor 11 is disposed away from the baffle 2. The outer edge of the baffle 2 away from the output shaft 12 of the drive motor 11 is hinged to the bottom of the air inlet cavity of the range hood.

[0054] Specifically, the cavity containing the air intake noise reduction structure is the air intake cavity of the range hood. One end of the drive unit 1 is hinged to the side wall of the air intake cavity away from the air inlet, and the other end of the drive unit 1 is hinged to the outer edge of the baffle 2 via the output shaft 12. The outer edge of the baffle 2 away from the output shaft 12 is hinged to the bottom of the air intake cavity. The output shaft 12 reciprocates to push the baffle 2 closer to or further away from the air inlet, thereby adjusting the air intake area of ​​the air inlet. In terms of shape, the baffle 2 is roughly the same as the shape and size of the air inlet. In terms of cross-section, the baffle 2 is inclined relative to the air intake direction of the air inlet, so that the drive unit 1 drives the baffle 2 to adjust the angle of the baffle 2, thereby adjusting the air intake area of ​​the baffle 2.

[0055] It is understood that in other embodiments, the drive unit 1 may also be other drive structures in the prior art that can drive the baffle 2 closer to or away from the air inlet. This is prior art and will not be described in detail here.

[0056] In this embodiment, the noise reduction part 3 is sound-absorbing cotton. The sound-absorbing cotton effectively absorbs the noise inside the cavity where the air intake noise reduction structure is located, as well as the intake noise transmitted through the sound-permeable hole 21.

[0057] Of course, in other embodiments, the noise reduction part 3 can also be other materials used for noise absorption in the prior art, such as glass wool, slag wool, and other inorganic loose materials. This is prior art and will not be described in detail here.

[0058] In this embodiment, the thickness of the sound-absorbing cotton is greater than the thickness of the baffle 2. By increasing the thickness of the sound-absorbing cotton, the noise reduction effect of the air intake noise reduction structure is improved. Since the noise reduction part 3 is located on the side of the baffle 2 away from the air inlet, there is no need to worry about the sound-absorbing cotton affecting the aerodynamic performance of the baffle.

[0059] This embodiment also provides a smoke collection hood 4, which includes the above-mentioned air intake noise reduction structure. The air intake noise reduction structure is disposed in the smoke collection chamber of the smoke collection hood 4, which is the air intake chamber of the range hood. The drive unit 1 and the noise reduction unit 3 are both disposed away from the air inlet of the smoke collection chamber, so as to effectively absorb the noise in the smoke collection hood 4 without affecting the aerodynamic performance of the baffle 2, that is, without affecting the air intake performance of the smoke collection hood 4, and prevent the noise in the smoke collection hood 4 from radiating outward. At the same time, it reduces the air intake noise of the smoke collection hood 4.

[0060] like Figure 1As shown, this embodiment also provides a range hood, which includes the aforementioned smoke collection hood 4. When a large amount of cooking fumes is being extracted, the noise generated by the reduced air intake area is absorbed by the noise reduction part 3 within the smoke collection hood 4, preventing it from radiating outwards. Simultaneously, when the air intake area is adjusted by the baffle 2 of the smoke collection hood 4, the noise reduction part 3 does not affect the aerodynamic performance of the baffle 2 and can indirectly increase the gas flow rate, improving the efficiency of fumes absorption. Furthermore, the sound-permeable holes 21 of the baffle 2, in conjunction with the noise reduction part 3, can also absorb intake noise, achieving effective fume absorption and noise reduction under conditions of large amounts of cooking fumes.

[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. An air intake noise reduction structure, the air intake noise reduction structure comprising a driving part and a baffle connected to the driving part, the baffle adjusting the air intake area via the driving part, characterized in that, The air intake noise reduction structure also includes: A noise reduction unit is disposed on the side of the baffle away from the air inlet; The baffle plate has a plurality of sound-permeable holes, which penetrate the baffle plate and are connected to the noise reduction part.

2. The air intake noise reduction structure as described in claim 1, characterized in that, The sound-permeable hole is a round hole, and the opening diameter of the sound-permeable hole ranges from 1 to 2 mm.

3. The air intake noise reduction structure as described in claim 1, characterized in that, The opening area of ​​several of the sound-permeable holes accounts for 2-5% of the area of ​​the baffle.

4. The air intake noise reduction structure as described in claim 1, characterized in that, A plurality of the sound-permeable holes are arranged in an array along the length and width directions of the baffle, and are spaced apart from each other.

5. The air intake noise reduction structure as described in claim 4, characterized in that, The spacing between two adjacent sound-permeable holes is 5-15mm.

6. The air intake noise reduction structure as described in claim 1, characterized in that, The drive unit includes a drive motor, the output shaft of which is a telescopic rod. One end of the drive motor is hinged to the outer edge of the baffle through the output shaft, and the other end of the drive motor is disposed away from the baffle. The outer edge of the baffle away from the output shaft of the drive motor is hinged to the bottom of the air inlet cavity of the range hood.

7. The air intake noise reduction structure as described in claim 1, characterized in that, The noise reduction part is sound-absorbing cotton.

8. The air intake noise reduction structure as described in claim 7, characterized in that, The thickness of the sound-absorbing cotton is greater than the thickness of the baffle.

9. A smoke collection hood, characterized in that, The smoke hood includes an air intake noise reduction structure as described in any one of claims 1-8, wherein the air intake noise reduction structure is disposed at the air intake of the smoke hood.

10. A range hood, characterized in that, The range hood includes the smoke collection hood as described in claim 9.

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