CN213395491U

CN213395491U - Range hood noise reduction device and range hood

Info

Publication number: CN213395491U
Application number: CN202022274879.2U
Authority: CN
Inventors: 任富佳; 于巍巍; 张凯歌; 钱金鑫; 张银锋; 周海昕
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-06-08
Anticipated expiration: 2030-10-13

Abstract

The utility model relates to a kitchen appliance technical field, concretely relates to range hood falls device and range hood of making an uproar. The embodiment of the utility model provides a range hood noise reduction device is equipped with noise reduction mechanism on the lateral wall of spiral case, and noise reduction mechanism includes damping layer and restraint layer, and the vibration that the fan subassembly produced transmits the damping layer on the one hand, and the part turns into the shear vibration of damping layer material for partial vibration energy turns into heat energy, weakens the structural vibration; on the other hand, damping layer and restraint layer can increase the structure counter weight, reduce the mode of the spiral case that the motor vibration arouses, reduce the production and the transmission of vibrations to reach the effect of making an uproar that falls in the damping, it is little to fall the overall thickness of mechanism of making an uproar, can not exert an influence to amount of wind and air inlet efficiency, compare in the scheme of bodiness spiral case lateral wall and rear panel, the device of making an uproar that falls that this embodiment provided need not set up the mounting panel to the lateral wall of spiral case and rear panel thickening either, can save material cost.

Description

Range hood noise reduction device and range hood

Technical Field

The utility model relates to a kitchen appliance technical field, concretely relates to range hood falls device and range hood of making an uproar.

Background

At present, in the operation process of the range hood, relatively large noise can be generated; as shown in fig. 1, the air duct structure of the range hood comprises a volute, a motor and a bracket, wherein the motor is fixed in the volute through the bracket, and vibration generated when the motor operates is transmitted to the volute through the motor bracket, so that strong vibration is generated on a left panel and a right panel of the volute and a rear panel at the contact position of the volute and a shell of the range hood, noise is radiated into air and is expressed as strong humming sound, and user experience is seriously influenced.

At present, the structural rigidity is improved by arranging the mounting plate on the volute and then arranging the structural reinforcing part between the mounting plate and the volute, and meanwhile, the thicknesses of two side panels and the rear panel of the volute are increased, so that structural vibration caused by motor vibration is weakened, and the effect of reducing noise is achieved.

However, the installation plate arranged on the volute affects the air volume and the air inlet efficiency, and the volute model needs to be redesigned in the manufacturing process, so that the manufacturing cost is greatly increased, and in addition, the thickness of the panel is increased, so that the material cost of the product is greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses (one) the technical problem that solve is: the noise that produces when current adoption increases spiral case both sides board and rear flank plate thickness and solve the motor operation has the high problem that influences amount of wind and air inlet efficiency of manufacturing cost.

(II) technical scheme

In order to solve the above technical problem, an embodiment of the present invention provides a noise reduction device for a range hood, including a fan assembly and a noise reduction mechanism;

the fan assembly comprises a volute, and the side wall of the volute is connected with the noise reduction mechanism;

the noise reduction mechanism comprises a damping layer and a constraint layer, wherein the damping layer is located between the side wall of the volute and the constraint layer.

According to the utility model discloses an embodiment, the range hood falls device of making an uproar still includes the casing, fan unit mount in the casing, be formed with the air outlet on the spiral case, the casing corresponds one side of air outlet lateral wall is the rear panel, be equipped with on the rear panel fall the mechanism of making an uproar, the damping layer is located the rear panel with between the restraint layer.

According to the utility model discloses an embodiment, install in on the rear panel it is the rectangle form to fall the mechanism of making an uproar.

According to the utility model discloses an embodiment, all be equipped with on two relative lateral walls of spiral case the mechanism of making an uproar falls.

According to an embodiment of the present invention, the noise reduction mechanism covers the side wall of the volute.

According to the utility model discloses an embodiment, be equipped with the ventilation hole on the lateral wall of spiral case, fall to make an uproar the mechanism be equipped with the opening that the ventilation hole corresponds.

According to the utility model discloses an embodiment, the damping layer is the rubber layer.

According to an embodiment of the present invention, the constraining layer is an aluminum foil layer.

According to the utility model discloses an embodiment, be equipped with the through-hole on the damping layer, the restraint layer is the sound absorbing layer.

According to the utility model discloses an embodiment, the thickness of damping layer is 1-40mm, the thickness of restraint layer is 0.1-0.2 mm.

An embodiment of another aspect of the present invention provides a range hood, including any one of the above embodiments, the range hood noise reduction device.

The utility model has the advantages that: the embodiment of the utility model provides a range hood noise reduction device, which comprises a fan component and a noise reduction mechanism; the side wall of the volute is provided with a noise reduction mechanism, the noise reduction mechanism comprises a damping layer and a constraint layer, on one hand, vibration generated by the fan assembly is transmitted to the damping layer, and part of the vibration is converted into shear vibration of the material of the damping layer, so that part of vibration energy is converted into heat energy, and the structural vibration is weakened; on the other hand, the damping layer and the constraint layer can increase the structural balance weight, reduce the mode of the volute excited by the vibration of the motor, and reduce the generation and transmission of vibration, thereby achieving the effects of vibration reduction and noise reduction.

The device of making an uproar that falls that this embodiment provided need not to change the structure, also need not to increase the thickness of spiral case and rear panel, and it is little to fall the overall thickness of mechanism of making an uproar, can not exert an influence to amount of wind and air inlet efficiency, compares in the scheme of bodiness spiral case lateral wall and rear panel, and the device of making an uproar that this embodiment provided need not also need not set up the mounting panel to the lateral wall of spiral case and rear panel thickening, can save material cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a noise reduction device of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a volute and a rear panel according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a noise reduction mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a noise reduction mechanism according to another embodiment of the present invention;

fig. 5 is a schematic view of the volute and the noise reduction mechanism according to an embodiment of the present invention.

Icon: 1-a shell; 11-enclosing plates; 12-a rear panel; 13-a top plate; 14-a volute; 141-an air inlet; 142-an air outlet; 2-a noise reduction mechanism; 21-a damping layer; 211-a through hole; 22-a constraining layer.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understandable, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, an embodiment of the utility model provides a noise reduction device for a range hood, which comprises a fan assembly and a noise reduction mechanism 2; the fan assembly comprises a volute 14, and the side wall of the volute 14 is connected with the noise reduction mechanism 2; as shown in fig. 3 and 4, the noise reduction mechanism 2 includes a damping layer 21 and a constraining layer 22, and the damping layer 21 is located between the side wall of the scroll casing 14 and the constraining layer 22.

The range hood noise reduction device provided by the embodiment comprises a fan assembly and a noise reduction mechanism 2; the side wall of the volute 14 is provided with the noise reduction mechanism 2, the noise reduction mechanism 2 comprises a damping layer 21 and a constraint layer 22, on one hand, vibration generated by the fan assembly is transmitted to the damping layer 21, and part of the vibration is converted into shear vibration of the material of the damping layer 21, so that part of vibration energy is converted into heat energy, and structural vibration is weakened; on the other hand, the damping layer 21 and the constraint layer 22 can increase the structural weight, reduce the mode of the volute 14 excited by the motor vibration, and reduce the generation and transmission, thereby achieving the effects of vibration reduction and noise reduction. The noise reduction device that this embodiment provided need not to change the structure, also need not to increase the thickness of spiral case 14 and rear panel 12, and noise reduction mechanism overall thickness is little, can not exert an influence to amount of wind and air inlet efficiency, compares in the scheme of bodiness spiral case 14 lateral wall and rear panel 12, and the noise reduction device that this embodiment provided need not set up the mounting panel to the lateral wall of spiral case 14 and rear panel 12 thickening either, can save material cost.

According to the utility model discloses an embodiment, as shown in fig. 1, the range hood noise reduction device still includes casing 1, fan unit mount in casing 1, be formed with air outlet 142 on the spiral case 14, casing 1 includes rear panel 12, bounding wall 11 and roof 13, bounding wall 11, rear panel 12 and roof 13 link to each other inside one and hold the chamber, fan unit mount is in holding the intracavity. One side of the shell 1 corresponding to the side wall of the air outlet 142 is a rear panel 12, the noise reduction mechanism 2 is arranged on the rear panel 12, and the damping layer 21 is located between the rear panel 12 and the constraint layer 22. Through set up the mechanism 2 of making an uproar of falling on back panel 12 for the vibration that the fan subassembly produced transmits damping layer 21, and the part turns into the shear vibration of damping layer 21 material, makes partial vibration energy conversion heat energy, prevents the vibration transmission to back panel 12 that the fan produced, can weaken the whole vibration of structure, further promotes the noise reduction effect.

In this embodiment, the fan assembly includes a volute 14, a motor and an impeller, the fan and the impeller are disposed in the volute 14, an air duct is formed in the volute 14, and the motor drives the impeller to rotate to generate an air flow, and then the air flow is blown out through the air duct in the volute 14. The air outlet end of the air duct is an air outlet 142, and air inlets 141 are disposed at two opposite sides of the scroll 14.

As shown in fig. 1 and 2, the noise reduction mechanism 2 mounted on the rear panel 12 is rectangular, and four corners of the rectangular noise reduction mechanism 2 are rounded. As shown in fig. 2, the noise reduction mechanisms 2 are disposed on two opposite side walls of the volute casing 14, so that the capability of absorbing the vibration transmitted to the volute casing 14 when the motor operates is improved, and the noise reduction and silencing effects can be further improved. In this embodiment, the noise reduction mechanism 2 may be only disposed on one side wall of the volute 14, and the purpose of reducing vibration and noise can also be achieved.

In this embodiment, the shape of the noise reduction mechanism 2 may be selected according to the shape of the side wall of the volute 14, and if the side wall of the volute 14 is annular, the noise reduction mechanism 2 may be correspondingly configured to be annular. Optionally, as shown in fig. 1 and fig. 5, in this embodiment, the noise reduction mechanism 2 disposed on the sidewall of the volute casing 14 completely covers the sidewall of the volute casing 14, and it can be understood that, since the air inlet 141 is disposed on the sidewall of the volute casing 14, in order not to affect the air inlet of the fan assembly, the noise reduction mechanism 2 is disposed at the opening corresponding to the air inlet 141, and the air flow can enter the air duct inside the volute casing 14 through the opening on the noise reduction mechanism 2 and the air inlet 141.

It should be noted that, locate the mechanism 2 of making an uproar that falls on the spiral case 14 lateral wall in this embodiment and also can not completely cover the lateral wall of spiral case 14, if fall the mechanism 2 that makes an uproar and only cover a part of spiral case 14 lateral wall, can realize equally the utility model discloses a set up and fall the mechanism 2 of making an uproar and reduce the vibration that the motor operation in-process transmitted for spiral case 14, and then reach the purpose that reduces the motor operation and produce the noise.

According to the utility model discloses an embodiment, it bonds to fall mechanism 2 of making an uproar on the lateral wall of spiral case 14, locate the mechanism 2 of making an uproar that falls of casing 1 rear panel 12 simultaneously and also can connect through the mode of bonding. The noise reduction mechanism 2 is connected in a bonding mode, so that the operation is simple and convenient, and the processing efficiency is higher. Of course, in the present embodiment, the noise reduction mechanism 2 may be connected to the side wall of the volute 14 and the rear panel 12 by other means, such as by screwing, snapping, riveting, welding, and the like.

In this embodiment, the noise reduction mechanism 2 is an integrated structure, that is, the noise reduction mechanism 2 is integrally manufactured and molded by cutting or the like; optionally, in this embodiment, the noise reduction mechanism 2 may also be formed by a plurality of splicing methods, which can reduce waste materials generated in the manufacturing process and save material cost. In this embodiment, the noise reduction mechanism 2 may also be connected to the fan assembly or the volute 14 at a position where the vibration is strong, so as to further improve the noise reduction effect.

The manufacturing material of the damping layer 21 in the above embodiment of the present invention has the following characteristics:

(1) has certain heat resistance and low temperature, and can ensure the stability within the temperature range of minus 30 ℃ to 250 ℃.

(2) The material has good energy absorption, can accept vibration and impact energy, and has the material rebound characteristic of not more than 20 percent within the range of minus 30 to 50 ℃.

(3) Good oxidation resistance and ozone concentration resistance of not less than 500 pphm.

(4) Has certain viscosity, is convenient to be directly pasted on a structure, does not fall off under the condition of structure vibration, and has Mooney viscosity meeting the requirement of ML (1+4) at 100 ℃ of 55 +/-5.

(5) Has chemical stability, insulating property and good waterproof property.

(6) Is environment friendly material, and has no pungent odor.

Optionally, in this embodiment, the damping layer 21 is a rubber layer; preferably, the damping layer 21 is a butyl rubber layer, and the thickness of the damping layer 21 may be 1mm-40 mm; preferably, the thickness of damping layer 21 is 2mm, and the damping layer 21 of 2mm thickness can enough play the purpose of making an uproar, can not influence the air output and the air inlet efficiency of fan subassembly again. Of course, other materials meeting the above characteristics can be used to make the damping layer 21 in the present embodiment, which can also achieve the purpose of the present invention, and the purpose of the present invention does not depart from the design idea of the present invention, which should fall within the protection scope of the present invention.

The material for forming the constraining layer 22 of the above embodiment of the present invention has the following characteristics:

(1) has a stiffness that is about an order of magnitude greater than the modulus of elasticity of the damping layer 21, and requires a loss factor of between 0.3 and 0.8, preferably 0.7, at the optimum use temperature (+ -25 ℃).

(2) Has certain high temperature resistance and low temperature resistance, and can ensure the stability within the temperature range of-30 ℃ to 250 ℃.

(3) The material has small shearing strength and is easy to shape cut.

(4) The material has smooth surface, no toxicity and no smell.

Optionally, in this embodiment, the constraint layer 22 is an aluminum foil layer; the thickness of the aluminum foil layer can be 0.1mm-2 mm; preferably, the thickness of aluminium foil layer is 0.5mm, and the aluminium foil layer of 0.5mm thickness can enough play the purpose of making an uproar, can not influence the air output and the air inlet efficiency of fan subassembly again. Of course, other materials meeting the above characteristics can be used to make the constraint layer 22 in the present embodiment, which can also achieve the purpose of the present invention, and the purpose of the present invention does not depart from the design idea of the present invention, which should fall within the protection scope of the present invention. The elastic modulus of the constraint layer 22 is about one order of magnitude greater than that of the damping layer 21, and at the use temperature (+ -25 ℃), the loss factor is between 0.3 and 0.8, and as the volute 14 is thin, the volute 14 is excited in the mode and generates structural vibration, the volute 14 can be prevented from generating deformation.

Watch 1

Through experimental tests, compared with the existing range hood, the range hood noise reducer provided by the embodiment has the advantages that the sound pressure levels of multiple frequencies are greatly reduced, wherein the reduction amplitudes of 200Hz and 300Hz are most obvious, and are respectively reduced by 9.31dB and 10.74 dB. In terms of hearing, by adopting the noise reduction mechanism 2 provided by the embodiment, hum obviously disappears, and the use experience of the user can be improved.

According to an embodiment of the present invention, as shown in fig. 4, the damping layer 21 is provided with a through hole 211, and the constraint layer 22 is a sound absorption layer; on the effect basis that damping material weakens the structure vibration, the damping layer 21 that is equipped with through-hole 211 can further cushion the shock attenuation, and restraint layer 22 adopts sound absorbing material to make, can play sound absorption sound-proof effect. In this embodiment, the damping layer 21 is provided with a plurality of through holes 211 and is combined with the sound absorbing layer, so that the effect of buffering and shock absorption can be further improved. As shown in fig. 4, the through hole 211 may be a square hole, and of course, in this embodiment, the through hole 211 may also be a circular hole, a triangular hole, a trapezoidal hole, or another irregular hole, and it can also be achieved that the through hole 211 is disposed on the damping layer 21 to play a role in sound insulation and sound absorption in this embodiment.

The utility model also provides a range hood adopts above-mentioned arbitrary embodiment range hood fall device of making an uproar, this range hood is under the prerequisite that does not influence air inlet efficiency and air output, the noise reduction that can meditation promotes user's use and experiences.

In the description of the present invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description of the present invention and simplification of description, and does not indicate or imply that the device or element referred to must have a certain orientation, be constructed in a certain orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A noise reduction device of a range hood is characterized by comprising: a fan assembly and a noise reduction mechanism (2);

the fan assembly comprises a volute, and the side wall of the volute is connected with the noise reduction mechanism (2);

the noise reduction mechanism (2) comprises a damping layer (21) and a constraining layer (22), and the damping layer (21) is located between the side wall of the volute and the constraining layer (22).

2. The range hood noise reduction device according to claim 1, further comprising a housing (1), wherein the fan assembly is installed in the housing (1), an air outlet is formed on the volute, a rear panel (12) is arranged on one side of the housing (1) corresponding to the side wall of the air outlet (142), the noise reduction mechanism (2) is arranged on the rear panel (12), and the damping layer (21) is located between the rear panel (12) and the constraint layer (22).

3. The range hood noise reduction device of claim 2, wherein the noise reduction mechanism (2) mounted on the rear panel (12) is rectangular.

4. The range hood noise reduction device according to claim 1, wherein the noise reduction mechanism (2) is disposed on each of two opposite sidewalls of the volute.

5. The range hood noise reduction device of claim 1, wherein the noise reduction mechanism (2) covers a sidewall of the volute.

6. The range hood noise reduction device according to claim 1, wherein the noise reduction mechanism (2) is bonded to a sidewall of the volute.

7. The range hood noise reduction device of claim 1, wherein the damping layer (21) is a rubber layer.

8. The range hood noise reduction device of claim 1, wherein the constraint layer (22) is an aluminum foil layer.

9. The range hood noise reduction device according to claim 1, wherein the damping layer (21) is provided with through holes (211), and the constraint layer (22) is a sound absorption layer.

10. The range hood noise reduction device according to claim 1, wherein the thickness of the damping layer (21) is 1-40mm, and the thickness of the constraining layer (22) is 0.1-0.2 mm.

11. A range hood, characterized by comprising a range hood noise reduction device as claimed in any one of claims 1 to 9.