A range hood with a sound-attenuating and noise-reducing structure

Abstract

The utility model belongs to the range hood technical field especially has a kind of range hood with sound-absorbing noise reduction structure, first air inlet is equipped with sound-absorbing cotton cover, sound-absorbing cotton cover is horn pipe structure, and one end of sound-absorbing cotton cover is adapted with the air inlet end of centrifugal fan, the other end of sound-absorbing cotton cover is adapted with first air inlet;The air inlet box includes the second air inlet of bottom, the side surface of air inlet box is provided with second air outlet, and the first sound-absorbing piece is provided in air inlet box;The sound-absorbing cotton cover arranged in air outlet chamber adopts horn pipe structure, one end thereof is adapted with the air inlet end of centrifugal fan, and the other end is adapted with first air inlet.This structure design can guide air to enter centrifugal fan smoothly, reduce the turbulence and turbulent flow in the process of airflow, thereby reducing the noise generated by airflow disturbance.Meanwhile, the material of sound-absorbing cotton cover itself has good sound-absorbing performance, and can further absorb part of mechanical noise and airflow noise.

Description

Technical Field

[0001] This utility model belongs to the field of range hood technology, specifically relating to a range hood with a noise reduction structure. Background Technology

[0002] In modern commercial kitchens, range hoods are indispensable kitchen appliances, their main function being to quickly extract cooking fumes to maintain a clean kitchen environment. However, traditional range hoods often operate with considerable noise, causing many inconveniences for users.

[0003] The noise of traditional range hoods mainly comes from two aspects: First, when the exhaust fan is running at high speed, the air entering the exhaust fan is prone to turbulent noise due to airflow disturbance, and the mechanical operation of the exhaust fan itself will also generate a certain amount of mechanical noise; Second, after the fumes enter the range hood from the air intake area, the noise will be further aggravated by the friction and collision between the airflow and the components, as well as the airflow disturbance caused by the air pressure difference in different areas, as the fumes enter the range hood from the air intake area.

[0004] Therefore, developing a range hood structure that can effectively reduce noise without affecting ventilation efficiency is of great practical significance. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a range hood with a noise reduction and sound absorption structure. The specific technical solution is as follows:

[0006] A range hood with a noise reduction structure includes a lower housing and an air outlet chamber, a purification chamber, and an air inlet chamber sequentially installed on the upper part of the lower housing. The air outlet chamber includes an air outlet box installed on the upper part of the lower housing. A bottom cover plate is installed at the lower end of the air outlet box by screws. A centrifugal exhaust fan is installed inside the air outlet box by screws. A first air outlet is opened at the upper end of the air outlet box and is located at the air outlet end of the centrifugal exhaust fan. A first air inlet is provided on the side surface of the air outlet box and is located at the air inlet end of the centrifugal exhaust fan. A sound-absorbing cotton cover is installed inside the first air inlet. The sound-absorbing cotton cover has a horn tube structure, and one end of the sound-absorbing cotton cover is adapted to the air inlet end of the centrifugal exhaust fan, and the other end of the sound-absorbing cotton cover is adapted to the first air inlet. The air inlet chamber includes an air inlet box installed on the upper part of the lower housing. The air inlet box includes a second air inlet at the bottom. A second air outlet is provided on the side surface of the air inlet box. A first sound-absorbing component is provided inside the air inlet box.

[0007] Preferably, the centrifugal exhaust fan includes a main housing and a secondary housing fixed inside the air outlet box. A motor is installed inside the main housing, and the output shaft of the motor is fixed to the inner surface of the main housing. Fan blades are fixed to the housing of the motor. A second silencing component is provided inside the main housing and the secondary housing, and the second silencing component is sleeved outside the motor and the fan blades.

[0008] Preferably, the second silencing component includes a first silencing pad bonded to the inner surface of the main housing and a second silencing pad bonded to the inner surface of the sub-housing housing.

[0009] Preferably, the splicing line of the first and second sound-absorbing inner pads is misaligned with the splicing line of the main shell and the sub-shell.

[0010] Preferably, the first silencing component includes a silencing cotton tube installed inside the air inlet box. One end of the air inlet box is integrally formed with a first connecting plate, and the other end of the air inlet box is integrally formed with a second connecting plate. The first connecting plate and the second connecting plate are perpendicular to each other. The first connecting plate at one end of the silencing cotton tube corresponds to the second air inlet, and the second connecting plate at one end of the silencing cotton tube corresponds to the second air outlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. Significant Noise Reduction in the Air Outlet Chamber: The sound-absorbing cotton cover in the air outlet chamber adopts a trumpet-shaped structure, with one end adapted to the air inlet of the centrifugal exhaust fan and the other end adapted to the first air inlet. This structural design can guide air smoothly into the centrifugal exhaust fan, reducing airflow turbulence and disturbance during the entry process, thereby reducing noise generated by airflow disturbance. At the same time, the material of the sound-absorbing cotton cover itself has good sound absorption properties, which can further absorb some mechanical noise and airflow noise, significantly improving the overall noise reduction effect of the air outlet chamber.

[0013] 2. Optimized Noise Reduction Function of the Air Inlet Chamber: The first noise reduction component installed inside the air inlet box can effectively reduce the noise of the air entering the air inlet chamber. The first noise reduction component can specifically absorb the friction noise and disturbance noise generated when oil fumes enter the air inlet chamber, reducing noise generation at the source and ensuring effective noise control of oil fumes in the early stages of entering the range hood.

[0014] 3. Ensure smooth airflow and improve ventilation efficiency: The horn-shaped structure of the sound-absorbing cotton cover reduces noise while avoiding increased airflow resistance caused by improper sound-absorbing structure design. Its reasonable size adaptability guides the airflow smoothly, reducing air resistance when air is transferred between the exhaust chamber and the clean chamber, ensuring that ventilation efficiency is not affected, and achieving a balance between noise reduction and efficient exhaust.

[0015] 4. Reduced overall noise and improved user experience: Through a dual noise reduction design of the air outlet and air inlet chambers, the overall noise level of the range hood during operation is significantly reduced. This not only improves the acoustic environment of the kitchen and reduces noise interference in users' lives, but also enhances user comfort and satisfaction during cooking. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the air outlet chamber structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the air outlet chamber component in this utility model;

[0019] Figure 4 This is a schematic diagram showing the disassembled structure of the centrifugal exhaust fan parts in this utility model;

[0020] Figure 5 This is a schematic diagram of the air inlet chamber structure in this utility model;

[0021] Figure 6 This is a schematic diagram showing the disassembled structure of the air inlet chamber component in this utility model.

[0022] Reference numerals: 1. Lower housing; 2. Air outlet chamber; 21. Air outlet box; 22. Bottom cover plate; 23. Centrifugal exhaust fan; 231. Main housing; 232. Motor; 233. Fan blade; 234. Secondary housing; 235. First sound-absorbing inner pad; 236. Second sound-absorbing inner pad; 24. First air outlet; 25. First air inlet; 26. Sound-absorbing cotton cover; 3. Purification chamber; 4. Air inlet chamber; 41. Air inlet box; 42. Second air inlet; 43. Second air outlet; 44. Sound-absorbing cotton pipe; 45. First connecting plate; 46. Second connecting plate. Detailed Implementation

[0023] The technical solution of this utility model will now be described with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1-6This embodiment provides the following technical solution: a range hood with a noise reduction structure, including a lower housing 1, and an air outlet chamber 2, a purification chamber 3, and an air inlet chamber 4 sequentially installed on the upper part of the lower housing 1. The air outlet chamber 2 includes an air outlet box 21 installed on the upper part of the lower housing 1. A bottom cover plate 22 is installed at the lower end of the air outlet box 21 by screws. A centrifugal exhaust fan 23 is installed inside the air outlet box 21 by screws. A first air outlet 24 is opened at the upper end of the air outlet box 21, and the first air outlet 24 is located at the air outlet end of the centrifugal exhaust fan 23. The side surface of the air outlet box 21 is provided with... The first air inlet 25 is located at the air inlet end of the centrifugal exhaust fan 23. A sound-absorbing cotton cover 26 is installed inside the first air inlet 25. The sound-absorbing cotton cover 26 has a horn tube structure. One end of the sound-absorbing cotton cover 26 is adapted to the air inlet end of the centrifugal exhaust fan 23, and the other end of the sound-absorbing cotton cover 26 is adapted to the first air inlet 25. The air inlet chamber 4 includes an air inlet box 41 installed on the upper part of the lower housing 1. The air inlet box 41 includes a second air inlet 42 at the bottom. A second air outlet 43 is provided on the side surface of the air inlet box 41. A first sound-absorbing component is provided inside the air inlet box 41.

[0025] In this embodiment, the air outlet chamber 2 is composed of an air outlet box 21, a bottom cover plate 22, a centrifugal exhaust fan 23, a first air outlet 24, a first air inlet 25, and a sound-absorbing cotton cover 26. One end of the sound-absorbing cotton cover 26, which has a horn tube structure, is adapted to the air inlet end of the centrifugal exhaust fan 23, and the other end of the sound-absorbing cotton cover 26 is adapted to the first air inlet 25. This increases the airflow when air enters the air outlet chamber 2 through the sound-absorbing cotton cover 26 into the centrifugal exhaust fan 23, thereby making the airflow smoother and avoiding the resistance of air from the purification chamber 3 to the air outlet chamber 2, thus achieving the purpose of reducing noise. The first sound-absorbing component installed in the air inlet box 41 achieves the purpose of silencing the air entering the air inlet chamber 4.

[0026] Specifically, the centrifugal exhaust fan 23 includes a main housing 231 and a secondary housing 234 fixed inside the air outlet box 21. A motor 232 is installed inside the main housing 231, and the output shaft of the motor 232 is fixed to the inner surface of the main housing 231. A fan blade 233 is fixed to the housing of the motor 232. A second silencing component is provided inside the main housing 231 and the secondary housing 234, and the second silencing component is sleeved outside the motor 232 and the fan blade 233. The second silencing component includes a first silencing pad 235 bonded to the inner surface of the main housing 231 and a second silencing pad 236 bonded to the inner surface of the secondary housing 234. The splicing line of the first silencing pad 235 and the second silencing pad 236 is misaligned with the splicing line of the main housing 231 and the secondary housing 234.

[0027] In this embodiment, the fan 23 is composed of a main housing 231, a motor 232, a fan blade 233, a secondary housing 234, and a second noise reduction component. After the main housing 231 and the secondary housing 234 are spliced ​​together, the noise generated by the rotation of the fan blade 233 is reduced by the second noise reduction component. At the same time, the second noise reduction component is composed of a first noise reduction pad 235 and a second noise reduction pad 236, which facilitates the cooperation of the first noise reduction pad 235 and the second noise reduction pad 236 to reduce noise. Meanwhile, the splicing line of the main housing 231 and the secondary housing 234 is misaligned with the splicing line of the first noise reduction pad 235 and the second noise reduction pad 236, which facilitates the assembly of the centrifugal exhaust fan 23.

[0028] Specifically, the first silencer includes a sound-absorbing cotton tube 44 installed inside the air inlet box 41. One end of the air inlet box 41 is integrally formed with a first connecting plate 45, and the other end of the air inlet box 41 is integrally formed with a second connecting plate 46. The first connecting plate 45 and the second connecting plate 46 are perpendicular to each other. The first connecting plate 45 at one end of the sound-absorbing cotton tube 44 corresponds to the second air inlet 42, and the second connecting plate 46 at one end of the sound-absorbing cotton tube 44 corresponds to the second air outlet 43.

[0029] In this embodiment, a first noise reduction component is used, consisting of a noise reduction cotton tube 44, a first connecting plate 45, and a second connecting plate 46. The first connecting plate 45 at one end of the noise reduction cotton tube 44 is located inside the second air inlet 42, and the second connecting plate 46 at the other end of the noise reduction cotton tube 44 is located inside the second air outlet 43. This facilitates the noise reduction of the air entering the air inlet box 41 through the cooperation of the noise reduction cotton tube 44, the first connecting plate 45, and the second connecting plate 46.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A range hood with a noise reduction structure, comprising a lower housing (1), and an air outlet chamber (2), a purification chamber (3), and an air inlet chamber (4) sequentially installed on the upper part of the lower housing (1), characterized in that: The air outlet chamber (2) includes an air outlet box (21) installed on the upper part of the lower shell (1). The lower end of the air outlet box (21) is fitted with a bottom cover plate (22) by screws. A centrifugal exhaust fan (23) is installed inside the air outlet box (21) by screws. The upper end of the air outlet box (21) is provided with a first air outlet (24), and the first air outlet (24) is located at the air outlet end of the centrifugal exhaust fan (23). The side surface of the air outlet box (21) is provided with a first air inlet (25), and the first air inlet (25) is located at the air inlet end of the centrifugal exhaust fan (23). A sound-absorbing cotton cover (26) is installed inside the first air inlet (25). The sound-absorbing cotton cover (26) is a horn tube structure. One end of the sound-absorbing cotton cover (26) is adapted to the air inlet end of the centrifugal exhaust fan (23), and the other end of the sound-absorbing cotton cover (26) is adapted to the first air inlet (25). The air inlet chamber (4) includes an air inlet box (41) installed on the upper part of the lower housing (1). The air inlet box (41) includes a second air inlet (42) at the bottom. A second air outlet (43) is provided on the side surface of the air inlet box (41). A first silencer is provided inside the air inlet box (41).

2. A range hood with a noise reduction structure according to claim 1, characterized in that: The centrifugal exhaust fan (23) includes a main housing (231) and a secondary housing (234) fixed inside an air outlet box (21). A motor (232) is installed inside the main housing (231). The output shaft of the motor (232) is fixed to the inner surface of the main housing (231). A fan blade (233) is fixed to the housing of the motor (232). A second silencing component is provided inside the main housing (231) and the secondary housing (234), and the second silencing component is sleeved outside the motor (232) and the fan blade (233).

3. A range hood with a noise reduction structure according to claim 2, characterized in that: The second silencing component includes a first silencing pad (235) bonded to the inner surface of the main housing (231) and a second silencing pad (236) bonded to the inner surface of the sub-housing housing (234).

4. A range hood with a noise reduction structure according to claim 3, characterized in that: The splicing line of the first silencing pad (235) and the second silencing pad (236) is misaligned with the splicing line of the main shell (231) and the sub-shell (234).

5. A range hood with a noise reduction structure according to claim 1, characterized in that: The first silencing component includes a silencing cotton tube (44) installed inside the air inlet box (41). One end of the air inlet box (41) is integrally formed with a first connecting plate (45), and the other end of the air inlet box (41) is integrally formed with a second connecting plate (46). The first connecting plate (45) and the second connecting plate (46) are perpendicular to each other. The first connecting plate (45) at one end of the silencing cotton tube (44) corresponds to the second air inlet (42), and the second connecting plate (46) at one end of the silencing cotton tube (44) corresponds to the second air outlet (43).

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