CN217274349U

CN217274349U - Range hood with noise reduction function

Info

Publication number: CN217274349U
Application number: CN202220121412.0U
Authority: CN
Inventors: 时璐璐
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-08-23
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to a range hood with function of making an uproar is fallen, include: the air conditioner comprises a shell, a fan and a controller, wherein the shell is provided with an air inlet duct which is provided with an air inlet; the noise reduction device is arranged on the inner wall of the air inlet duct; the noise reduction device comprises a noise reduction plate with noise reduction holes distributed thereon, the noise reduction plate is arranged on the inner wall of the air inlet duct and is adjacent to the air inlet, and the noise reduction plate is constructed into an arc-shaped plate structure with the middle part protruding towards the inside of the air inlet duct. The noise reduction plate arranged at the air inlet is an arc-shaped plate protruding towards the inside of the air inlet duct, and flow guide can be carried out at the abrupt change position of the section of the air inlet, so that the flow state of fluid is controlled, the oil smoke absorption effect is improved, and the gas noise is reduced; on the other hand, the noise cut-off frequency at the air inlet can also be adjusted to the add-on of the board of making an uproar that falls, and it is on the basis that reasonable guide air current enters into air inlet duct smoothly, has further improved the noise reduction effect.

Description

Range hood with noise reduction function

Technical Field

The utility model relates to a range hood technical field especially relates to a range hood with function of making an uproar is fallen.

Background

The range hood is a kitchen appliance for purifying the kitchen environment. The range hood is a product which uses a motor to drive a impeller to rotate in a volute to generate negative pressure so as to pump oil smoke away and discharge the oil smoke out of a room. In the running process of the power part of the range hood, large noise can be generated to influence the physiological and psychological comfort of a user, and great trouble is caused to the user, so that the range hood is necessary to effectively reduce the noise. At present, the noise is reduced and the flow is improved mainly by means of flow channel optimization and auxiliary noise reduction.

The invention discloses a three-dimensional flow-guiding and sound-absorbing noise reduction system of a range hood, which is disclosed in Chinese patent application No. CN201610738828.6 (No. CN106322474B), and comprises a main machine shell and an air duct system arranged in the main machine shell, wherein the air duct system comprises a fan shell and a fan air inlet arranged on the fan shell, a main flow noise reduction body extending up and down is arranged on the inner side surface of the main machine shell opposite to the fan air inlet, the main flow noise reduction body is provided with a left main flow guide inclined surface and a right main flow guide inclined surface, and the distance between the left main flow guide inclined surface and the right main flow guide inclined surface is gradually reduced from the inner side surface of the main machine shell where the main flow noise reduction body is located to the direction of the fan air inlet. The auxiliary flow guiding noise reduction body is connected with the main machine shell through a bolt, a second hollow inner cavity is formed in the auxiliary flow guiding noise reduction body, a plurality of noise reduction holes communicated with the second hollow inner cavity are formed in the outer side face of the auxiliary flow guiding noise reduction body, and an inner sound absorption material is arranged in the second hollow inner cavity.

The noise reduction structure in the above patent has a certain flow guiding and noise reduction effect in the air inlet duct, but does not consider the influence of the cross section mutation and the flow velocity mutation of the smoke fluid at the air inlet on the oil smoke absorption effect and the noise reduction effect, especially the arrangement of the auxiliary flow guiding and noise reduction body with a triangular cross section in the air duct, so that the flow state of the smoke fluid entering the fan system from the air inlet in the flow process can not be effectively controlled, and the good noise reduction at the air inlet is not facilitated.

Therefore, the existing range hood needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a range hood with function of making an uproar is fallen, this range hood can carry out the water conservancy diversion to this air intake department oil smoke fluid of flowing through, has further improved the noise reduction effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a range hood with noise reduction function comprises:

the air conditioner comprises a shell, a fan and a controller, wherein the shell is provided with an air inlet duct which is provided with an air inlet;

the noise reduction device is arranged on the inner wall of the air inlet duct;

the noise reduction device comprises a noise reduction plate with noise reduction holes distributed thereon, the noise reduction plate is arranged on the inner wall of the air inlet duct and is adjacent to the air inlet, and the noise reduction plate is constructed into an arc-shaped plate structure with the middle part protruding towards the inside of the air inlet duct.

In order to further improve the noise reduction effect, the noise reduction device further comprises a sound absorption piece, a noise reduction cavity is defined between the noise reduction plate and the inner wall of the air inlet duct, and therefore the sound absorption piece is filled in the noise reduction cavity.

In order to carry out the pertinence to the noise that this kind of cross section sudden change structure arouses at air inlet and fall and make an uproar, fall the value range of the aperture of the hole of making an uproar and be: 2 mm-5 mm.

In order to further improve the flow guiding effect, the air inlet duct is vertically arranged, the bottom side edge of the noise reduction plate is jointed with the edge of the air inlet, and the top side edge of the noise reduction plate is smoothly connected with the inner wall of the air inlet duct.

In order to reduce the impact of airflow at the air inlet as much as possible and enable the airflow to smoothly enter the air inlet duct through the air inlet, the vertical section of the noise reduction plate comprises a first straight line section, an arc section, a second straight line section and a third straight line section which are sequentially and smoothly connected along the flow direction of flue gas, the first straight line section extends from the inner wall of the air inlet duct to the middle area of the air inlet duct, the arc section protrudes from the first straight line section towards the inside of the air inlet duct, the second straight line section inclines from the arc section towards the inner wall of the air inlet duct along the flow direction of flue gas, and the third straight line section and the second straight line section are obliquely arranged and are in smooth transition connection.

In order to reasonably design the size of the convex part on the noise reduction plate, the total length of the noise reduction plate in the flow direction of flue gas is L, and the diameter of the circular arc section of the noise reduction plate is R, wherein R is more than or equal to 1/8L and less than or equal to 1/4L.

In order to enable the overall size of the noise reduction plate to be matched with the size of the shell, a fan system is arranged in the shell, and the distance between the fan system and the air inlet of the air inlet duct is L ₀ Wherein, 1/2L ₀ ≤L≤L ₀ 。

In order to further guarantee the water conservancy diversion effect, avoid leaving the dead angle in air inlet department, influence the mobile effect of air current, the casing includes that a plurality of vertical extensions arrange, and at the curb plate that circumference links up in proper order, each the curb plate encloses jointly and closes the formation air inlet duct, it has a plurality ofly to fall the board of making an uproar, and every fall the board of making an uproar with a curb plate of casing is corresponding, each it links up in proper order in air inlet duct's circumference to fall the board of making an uproar and forms an annular water conservancy diversion spare that has the throat.

In order to improve the oil fume suction effect, the range hood further comprises a fume collecting cover arranged at the bottom of the machine shell, and the fume collecting cover is provided with a fume collecting cavity communicated with the air inlet.

Compared with the prior art, the utility model has the advantages that: the noise reduction plate arranged at the air inlet is an arc-shaped plate with the middle part protruding towards the inside of the air inlet duct, and flow guide can be carried out at the abrupt change part of the section of the air inlet, so that the flow state of fluid is controlled, the oil smoke absorption effect is improved, and the gas noise is reduced; on the other hand, the noise reduction plate is provided with a noise reduction hole, the noise cut-off frequency at the air inlet can be adjusted, and the noise reduction effect is further improved on the basis that air flow is reasonably guided to smoothly enter the air inlet duct.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a vertical sectional view of the embodiment of the present invention along the front-rear direction;

fig. 3 is a vertical perspective cross-sectional view of the housing of an embodiment of the present invention (showing a noise reduction plate and a sound absorbing member);

fig. 4 is a schematic perspective view of a noise reduction plate and a sound absorption member according to an embodiment of the present invention;

fig. 5 is a bottom view of the housing according to the embodiment of the present invention;

fig. 6 is a left side view of a noise reduction plate according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of an annular flow guiding member formed by sequentially connecting four noise reduction plates (with noise reduction holes hidden) according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Referring to fig. 1 to 7, a range hood with a noise reduction function includes a casing 10, a fan system 13, a smoke collection cover 20 and a noise reduction device, wherein the smoke collection cover 20 is disposed at the bottom of the casing 10. The fan system 13 is disposed in the casing 10 for providing negative pressure for sucking and exhausting oil smoke.

Referring to fig. 2, the casing 10 of the present embodiment has a vertically extending air inlet duct 11, and the bottom of the air inlet duct 11 has an air inlet 110, and the air inlet 110 is communicated with the smoke collecting chamber 21 of the smoke collecting cover 20. Specifically, the casing 10 includes four side plates 12 which are vertically extended and sequentially connected in the circumferential direction, and the four side plates 12 jointly enclose the air inlet duct 11.

The noise reduction device is disposed on the inner wall of the intake duct 11 and is adjacent to the intake vent 110 at the bottom.

The noise reducing device comprises a noise reducing plate 30 and a sound absorbing element 40. The noise reduction plate 30 is connected to the inner wall of the air inlet duct 11, specifically, the noise reduction is vertical, the bottom edge of the noise reduction plate 30 is connected to the edge of the air inlet 110, the top edge of the noise reduction plate 30 is attached to the inner wall of the air inlet duct 11, the middle of the noise reduction plate 30 protrudes towards the inside of the air inlet duct 11 and is arc-shaped, and a noise reduction cavity 300 is defined between the noise reduction plate 30 and the inner wall of the casing 10. The sound absorbing member 40 is filled in the noise reducing chamber 300, and has a shape corresponding to the shape of the noise reducing chamber 300.

The noise reduction plate 30 is distributed with noise reduction holes 301 communicated with the noise reduction cavity 300. The value range of the aperture of the noise reduction hole 301 is as follows: 2mm to 5mm, preferably 4 mm.

Referring to fig. 3 and 5, the noise reduction plate 30 of the present embodiment may be one, and is disposed corresponding to an inner wall of one of the side plates 12 of the casing 10, wherein a bottom side of the noise reduction plate 30 is engaged with an edge of the air inlet 110, and a top side of the noise reduction plate 30 is smoothly connected with an inner wall of the air inlet duct 11. Of course, it is conceivable that the noise reduction plates 30 of the present embodiment may be two, and are symmetrically disposed on the inner walls of the two opposite side plates 12 of the casing 10. Alternatively, four noise reduction plates 30 may be provided, and correspond to the four side plates 12 of the casing 10 one by one.

Referring to fig. 6, the vertical cross section of each noise reduction plate 30 includes a first straight line segment 31, a circular arc segment 32, a second straight line segment 33, and a third straight line segment 34, which are connected in sequence and smoothly along the flow direction of the flue gas. The first straight line segment 31 extends horizontally from the edge of the air inlet 110 of the air inlet duct 11 to the middle area of the air inlet duct 11. The first end of the circular arc section 32 is connected with the first straight line section 31 in a smooth transition mode, and the circular arc section 32 protrudes from the first straight line section 31 towards the inside of the air inlet duct 11. The first straight line segment 31 is connected with the second end of the circular arc segment 32 in a smooth transition manner, and the second straight line segment 33 inclines from the second end of the circular arc segment 32 to the inner wall of the air inlet duct 11 along the smoke flowing direction. The third straight line section 34 is substantially vertically arranged and parallel to a vertical plane where the inner wall of the air inlet duct 11 is located, wherein the third straight line section 34 and the second straight line section 33 are obliquely arranged and are in smooth transition connection.

In order to make the overall size of the noise reduction plate 30 fit with the size of the casing 10 and achieve good flow guiding and noise reduction effects as much as possible, a fan system 13 is disposed in the casing 10, a distance between the fan system 13 (i.e., the lowest position of the volute of the fan) and the air inlet 110 of the air inlet duct 11 is denoted as L0, a total length of the noise reduction plate 30 in the flow direction of the flue gas is denoted as L, and a diameter of the arc section 32 of the noise reduction plate 30 is denoted as R, wherein R is equal to or greater than 1/8L and equal to or less than 1/4L, and L is equal to or less than 1/2L0 and equal to or less than L0, which are shown in fig. 2 and 6 in detail.

In a further preferred scheme, the noise reduction plates 30 are sequentially connected in the circumferential direction of the air inlet duct 11 to form an annular flow guide member 30a with an inward-contracting opening, the annular flow guide member 30a is integrally designed and is installed at the air inlet 110, so that the flow guide effect can be further ensured, and the influence on the flow effect of the air flow due to a dead angle left at the air inlet 110 is avoided, as shown in detail in fig. 7.

Claims

1. A range hood with noise reduction function comprises:

the air conditioner comprises a shell (10) and a fan, wherein the shell is provided with an air inlet duct (11), and the air inlet duct (11) is provided with an air inlet (110);

the noise reduction device is arranged on the inner wall of the air inlet duct (11);

the method is characterized in that: the noise reduction device comprises a noise reduction plate (30) with noise reduction holes (301) distributed thereon, wherein the noise reduction plate (30) is arranged on the inner wall of the air inlet duct (11), is adjacent to the air inlet (110) and is constructed into an arc-shaped plate structure with the middle part protruding towards the inside of the air inlet duct (11).

2. The range hood with noise reduction function according to claim 1, wherein: the noise reduction device also comprises a sound absorption piece (40), a noise reduction cavity (300) is defined between the noise reduction plate (30) and the inner wall of the air inlet duct (11), so that the sound absorption piece (40) is filled in the noise reduction cavity (300).

3. The range hood with noise reduction function according to claim 1, wherein: the value range of the aperture of the noise reduction hole (301) is as follows: 2 mm-5 mm.

4. The range hood with noise reduction function according to claim 1, wherein: the air inlet duct (11) is vertically arranged, the bottom side edge of the noise reduction plate (30) is connected with the edge of the air inlet (110), and the top side edge of the noise reduction plate (30) is smoothly connected with the inner wall of the air inlet duct (11).

5. The range hood with the noise reduction function according to any one of claims 1 to 4, wherein: the vertical cross section of falling board (30) of making an uproar includes along flue gas flow direction smooth connection's first straightway (31), circular arc section (32), second straightway (33), third straightway (34) in proper order, first straightway (31) certainly the inner wall of air inlet duct (11) extends to the middle part region in air inlet duct (11), circular arc section (32) certainly first straightway (31) orientation protruding in air inlet duct (11), second straightway (33) certainly circular arc section (32) are along flue gas flow direction court the inner wall slope in air inlet duct (11), third straightway (34) with second straightway (33) slope is arranged, and smooth transition connects between the two.

6. The range hood with noise reduction function according to claim 5, wherein: the total length of the noise reduction plate (30) in the smoke flowing direction is L, the diameter of the circular arc section (32) of the noise reduction plate (30) is R, and R is greater than or equal to 1/8L and less than or equal to 1/4L.

7. The range hood with a noise reduction function according to claim 6, wherein: a fan system (13) is arranged in the machine shell (10), the distance between the fan system (13) and an air inlet (110) of the air inlet duct (11) is L0, wherein L is more than or equal to 1/2L0 and less than or equal to L0.

8. The range hood with noise reduction function according to claim 5, wherein: the casing (10) includes a plurality of vertical extension arrangements and curb plate (12) that link up in proper order in circumference, each curb plate (12) enclose jointly and close and form air inlet duct (11), it has a plurality ofly to fall board (30) of making an uproar, and every falls board (30) of making an uproar and a curb plate (12) of casing (10) are corresponding, each fall board (30) of making an uproar and link up in proper order in air inlet duct (11) circumference and form an annular water conservancy diversion spare (30a) that have the internal contraction mouth.

9. The range hood with the noise reduction function according to any one of claims 1 to 4, wherein: still including locating collection petticoat pipe (20) of casing (10) bottom, collection petticoat pipe (20) have with collection cigarette chamber (21) of air intake (110) intercommunication.