CN220506832U

CN220506832U - Fume exhauster

Info

Publication number: CN220506832U
Application number: CN202321995056.6U
Authority: CN
Inventors: 黄瑞毅
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-02-20
Anticipated expiration: 2033-07-27

Abstract

The utility model discloses a range hood, which comprises an air inlet assembly and a fan assembly arranged above the air inlet assembly, wherein the fan assembly comprises a shell and a fan system arranged on the inner side of the shell, and is characterized in that: the shell comprises a vacuum noise reduction piece which forms at least one side of the periphery of the shell, and a cavity which is formed by the operation of a fan system and forms vacuum is formed on the inner side of the vacuum noise reduction piece. Compared with the prior art, the utility model has the advantages that: the noise reduction structure can resist dust and oil smoke interference, and the sound insulation effect is stable.

Description

Fume exhauster

Technical Field

The utility model relates to a lampblack purifying device, in particular to a range hood.

Background

The fume exhauster is one kitchen appliance for purifying kitchen environment, and has the functions of exhausting fume produced during the burning of kitchen range and cooking process, reducing pollution, purifying air, etc.

The main box of the range hood and the range hood disclosed in the Chinese patent application number 202120150584.6 comprise a box body, wherein the wall of the box body is composed of an inner wall and an outer wall which are sequentially arranged from inside to outside, a sound absorption cavity is formed between the inner wall and the outer wall, sound absorption holes communicated with the sound absorption cavity are formed in the inner wall, and sound absorption cotton is filled in the sound absorption cavity.

In the current passive noise reduction method for the noise propagation process of the range hood, a sound absorption technology (such as sound absorption cotton) utilizing sound absorption is widely used, and the sound absorption cotton is widely used for noise reduction of the range hood due to light weight and good noise reduction effect, but has some problems, such as easy absorption of oil smoke and dust by the sound absorption cotton, large change of acoustic performance with time and poor noise reduction stability.

In order to solve the above problems, some patents have been disclosed, such as the chinese patent publication No. 201310276792.0, which discloses a vacuum damping plate for realizing sound insulation and damping of a range hood, and the hollow vacuum structure thereof makes the range hood have the advantages of good sound insulation effect and simple and light structure. The defects are that: 1) The interlayer needs to be vacuumized in advance, and the processing cost is high. 2) Once leakage occurs due to collision or quality problems, the sound insulation effect of the plate can be greatly reduced, so that the requirement on sealing is extremely high.

As disclosed in the chinese patent application No. 202220782176.7 of the applicant, the venturi effect is utilized to exhaust the air in the smoke guide plate from the air vent, so that a "vacuum-like interlayer" sound insulation layer structure is formed in the smoke guide plate, and the cost of vacuum obtaining and sealing is reduced. The defects are that: 1) No airflow non-return structure is arranged at the air inlet, the air pressure in the vacuum-like interlayer is unstable, so that the noise reduction effect is unstable, 2) the cross section area of the smoke guide plate is larger, the airflow velocity is slow, the interlayer air pressure is reduced less, and the noise insulation effect is poor.

Disclosure of Invention

The utility model aims to solve the technical problems of the prior art, and provides the range hood, wherein the noise reduction structure can resist dust and oil smoke interference and has stable sound insulation effect.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a range hood, includes air inlet subassembly and sets up the fan subassembly in air inlet subassembly top, the fan subassembly includes the casing and sets up the fan system in the casing is inboard, its characterized in that: the shell comprises a vacuum noise reduction piece which forms at least one side of the periphery of the shell, and a cavity which is formed by the operation of a fan system and forms vacuum is formed on the inner side of the vacuum noise reduction piece.

The cavity in the vacuum noise reduction piece can generate and maintain a vacuum-like interlayer by utilizing the self-contained low pressure at the impeller of the fan system of the range hood, no additional vacuum obtaining equipment is needed, the requirement on sealing is low, and the cost can be greatly reduced.

In order to realize and maintain the vacuum in the cavity of the vacuum noise reduction piece, the vacuum noise reduction piece comprises an air outlet hole which is arranged towards one side of the fan system and communicated with the cavity, and a unidirectional film which is unidirectional in ventilation from the air outlet hole towards the direction of the fan system is arranged at the air outlet hole.

In order to be able to constitute the cavity structure, the piece of making an uproar falls in vacuum includes first baffle, second baffle and support piece, first baffle and second baffle are by being close to fan system and are kept away from fan system direction interval setting, first baffle and second baffle pass through support piece to be supported and be connected, constitute between first baffle and the second baffle the cavity, the venthole sets up on first baffle, the one-way membrane sets up in first baffle one side that is close to fan system.

In order to limit the unidirectional film, the vacuum noise reduction piece comprises a limiting piece for limiting the unidirectional film on the first partition plate.

In order to facilitate the gas to pass through the limiting piece, a through hole for ventilation of the unidirectional film is formed in the center of the limiting piece.

In order to guide the air at the air inlet of the fan system, the air flow rate is improved, the lower pressure is obtained, the limiting piece is annular, and a guide part gradually rising towards the direction of the fan system from the periphery to the center is formed on the limiting piece.

In order to prevent waste oil accumulation, the lower part of the limiting piece is provided with an oil guide groove for guiding out the waste oil at the inner side.

In order to set up the vacuum noise reduction piece, the casing includes the vacuum noise reduction piece that constitutes the casing all around.

In order to set up the fan system, the casing still includes the fan support that sets up at the top of vacuum noise reduction spare, the fan system is connected with the fan support.

In order to improve the stability of making an uproar falls, fan system includes the air intake, the venthole of vacuum noise reduction spare and one-way membrane correspond the air intake setting.

Compared with the prior art, the utility model has the advantages that: the cavity in the vacuum noise reduction piece can generate and maintain a vacuum-like interlayer by utilizing the self-contained low pressure at the impeller of the fan system of the range hood, no additional vacuum obtaining equipment is needed, the requirement on sealing is low, and the cost can be greatly reduced. The airflow backflow prevention structure (one-way film) and the flow guide structure (flow guide part of the limiting part) are integrated, the instantaneous suction gear of the range hood can obtain lower pressure and maintain for a period of time, the stability and the nature of the sound insulation effect are guaranteed while the sound insulation effect is improved, and the noise reduction effect is improved by obtaining lower pressure through short-time strong wind quantity.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present utility model;

fig. 2 is a top cross-sectional view of a range hood according to an embodiment of the present utility model;

fig. 3 is a side sectional view of a range hood according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of part I of FIG. 3;

fig. 5 is a schematic view of a rear portion of a vacuum noise reduction member of a range hood according to an embodiment of the present utility model;

fig. 6 is an exploded view of a rear side portion of a vacuum noise reduction member of a range hood according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1 to 3, a range hood comprises an air inlet assembly 1 and a fan assembly arranged above the air inlet assembly 1. The lower part of the air inlet component 1 is provided with a smoking port 11. The fan assembly includes a housing and a fan system 21 disposed inside the housing. The fan system 21 includes a volute 212 and an impeller 213 disposed within the volute 212. The fan system 21 further includes an air intake 211 opened toward the rear.

The range hood further comprises a vacuum noise reduction piece 3 which forms the periphery (four sides) of the shell, and a fan bracket 4 which is covered on the top of the vacuum noise reduction piece 3. The fan system 21 is connected to the fan bracket 4.

The vacuum noise reduction member 3 is formed with a cavity 37 on the inner side thereof, and the vacuum in the cavity 37 is generated and maintained by the low pressure at the time of operation of the blower system 21. The vacuum noise reduction member 3 includes a first partition plate 31, a second partition plate 32, and a support member 33. The first partition 31 and the second partition 32 are spaced apart from each other from the fan system 21 toward the direction away from the fan system, and the supporting members 33 serve to enhance structural strength and provide screw holes for connection of the first partition 31 and the second partition 32. The first partition 31 and the second partition 32 are supported and connected by the support 33, and a cavity 37 is formed between the first partition 31 and the second partition 32.

Referring to fig. 3 to 6, the vacuum noise reduction member 3 is hollow and closed, and an air outlet hole 34 communicating with the inner side of the vacuum noise reduction member 3 is formed in a portion of the first partition 31 opposite to the air inlet 211 of the fan system 21. In the present embodiment, since the air inlet 211 of the fan system 21 faces the rear side, the air outlet 34 is opened at a position where the first partition 31 is located at the rear side of the fan system 21. A unidirectional film 35 which is ventilated unidirectionally from the air outlet hole 34 towards the fan system 21 is arranged at the air outlet hole 34, and the unidirectional film 35 is opened and closed under the control of low pressure when the fan system 21 operates.

The vacuum noise reduction member 3 includes a stopper 36 that stoppers the one-way film 35 on the first separator 31. The limiting member 36 is annular, and a through hole 361 for ventilation of the unidirectional film 35 is formed in the center of the limiting member 36. The stopper 36 is formed with a guide portion 362 gradually rising from the periphery to the center toward the fan system 21. The limiting piece 36 limits the position of the flexible unidirectional film 35, so that the unidirectional film 35 can be prevented from greatly moving to disturb the flow field, and meanwhile, the air inlet of the fan system 21 is guided, so that the air flow rate is improved. The lower part of the stopper 36 is provided with a guide groove 363 for guiding out the waste oil inside, and the guide groove 363 can prevent the waste oil inside from accumulating.

When the fan system 21 is operated, negative pressure is formed outside the fan system 21, the gas pressure in the cavity 37 is larger than that outside the cavity 37, so that the gas flows out from the cavity 37, a vacuum-like interlayer is formed in the cavity 37, the one-way film 35 can block the air outlet hole 34, gas backflow is prevented, and the stability of the noise reduction effect is ensured.

The noise reduction process of the range hood is as follows:

1) Starting the range hood;

2) The fan system 21 is started to the maximum air volume gear, at the moment, the air flow speed is the highest, and the pressure at the fan system 21 is the lowest;

3) The unidirectional film 35 is opened, air in the cavity 37 flows out, and the lowest pressure is reached in the cavity 37;

4) The fan system 21 is switched to a normal gear, at which time the air flow rate is reduced and the pressure at the fan system 21 is increased;

5) The unidirectional film 35 is closed, the cavity 37 is kept at low pressure, noise transmission is reduced, and noise of the range hood is reduced.

The utility model provides a sound-insulating and noise-reducing structure of a range hood, which has the advantages of dust resistance, oil smoke interference resistance, stable sound-insulating effect (compared with sound-absorbing cotton) and lighter mass. The cavity 37 in the vacuum noise reduction part 3 can generate and maintain a vacuum-like interlayer by utilizing the self-contained low pressure at the impeller 213 of the fan system 21 of the range hood, no additional vacuum obtaining equipment is needed, the requirement on sealing is low, and the cost can be greatly reduced. The flow rate of the gas near the impeller 213 is relatively high, and a higher vacuumizing effect can be obtained by using the venturi effect, thereby improving the sound insulation effect.

The airflow backflow prevention structure (the one-way film 35) and the flow guide structure (the flow guide part 362 of the limiting piece 36) are integrated, the instantaneous suction gear of the range hood can obtain lower pressure and maintain for a period of time, the stability and the nature of the sound insulation effect are ensured while the sound insulation effect is improved, and the noise reduction effect is improved by obtaining lower pressure through short-time strong wind quantity.

Claims

1. The utility model provides a range hood, includes air inlet subassembly (1) and sets up the fan subassembly in air inlet subassembly (1) top, the fan subassembly includes casing and sets up fan system (21) inboard at the casing, its characterized in that: the housing comprises a vacuum noise reduction member (3) forming at least one side of the periphery of the housing, and a cavity (37) which is formed by the operation of a fan system (21) and forms vacuum is formed on the inner side of the vacuum noise reduction member (3).

2. The range hood of claim 1, wherein: the vacuum noise reduction piece (3) comprises an air outlet hole (34) which is arranged at one side facing the fan system (21) and communicated with the cavity (37), and a unidirectional film (35) which is unidirectional in ventilation from the air outlet hole (34) to the direction of the fan system (21) is arranged at the air outlet hole (34).

3. The range hood of claim 2, wherein: the vacuum noise reduction piece (3) comprises a first partition plate (31), a second partition plate (32) and a supporting piece (33), wherein the first partition plate (31) and the second partition plate (32) are arranged at intervals in the direction away from the fan system (21) by being close to the fan system (21), the first partition plate (31) and the second partition plate (32) are supported and connected through the supporting piece (33), the cavity (37) is formed between the first partition plate (31) and the second partition plate (32), the air outlet hole (34) is formed in the first partition plate (31), and the unidirectional film (35) is arranged on one side, close to the fan system (21), of the first partition plate (31).

4. A range hood according to claim 3, wherein: the vacuum noise reduction member (3) includes a stopper (36) that holds the unidirectional film (35) on the first separator (31).

5. The range hood of claim 4, wherein: the center of the limiting piece (36) is provided with a through hole (361) for ventilation of the unidirectional film (35).

6. The range hood of claim 5, wherein: the limiting piece (36) is annular, and a flow guide part (362) gradually rising towards the fan system (21) from the periphery to the center is formed on the limiting piece (36).

7. The range hood of claim 5, wherein: the lower part of the limiting piece (36) is provided with an oil guide groove (363) for guiding out the waste oil at the inner side.

8. The range hood according to any one of claims 1 to 7, wherein: the shell comprises vacuum noise reduction pieces (3) forming the periphery of the shell.

9. The range hood of claim 8, wherein: the shell also comprises a fan bracket (4) arranged at the top of the vacuum noise reduction piece (3), and the fan system (21) is connected with the fan bracket (4).

10. The range hood according to any one of claims 2 to 7, wherein: the fan system (21) comprises an air inlet (211), and an air outlet hole (34) of the vacuum noise reduction piece (3) and the unidirectional film (35) are arranged corresponding to the air inlet (211).