CN215112816U

CN215112816U - Oil filter screen for range hood and range hood with same

Info

Publication number: CN215112816U
Application number: CN202120940477.3U
Authority: CN
Inventors: 谭朝辉
Original assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Current assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-10
Anticipated expiration: 2031-04-30

Abstract

The utility model provides an oil cleaner screen for cigarette machine and cigarette machine that has it. An air inlet hole is arranged on the oil filter screen for the range hood, a hollow cavity is arranged around the air inlet hole, the cavity is provided with an opening, and the opening is positioned on the windward side of the oil filter screen for the range hood and/or the side wall of the air inlet hole. When the range hood works, air flows at a high speed outside the air inlet hole, and the flowing air and the collision process of the air and the oil filter screen generate larger noise. The cavity with the opening can prevent the noise generated by high-speed airflow near the air inlet hole and the noise generated by collision with the oil filter screen from being transmitted, so that the purpose of reducing the noise is achieved. In addition, the oil cleaner screen is installed in the air intake department of cigarette machine, and the user regularly can wash the oil cleaner screen, washs the in-process of oil cleaner screen in daily life, just can wash the cavity, can guarantee from this that the cavity has good sound absorption effect. Compared with the existing noise reduction device arranged in the cigarette machine, the cigarette machine noise reduction device is easier to perform daily maintenance.

Description

Oil filter screen for range hood and range hood with same

Technical Field

The utility model relates to a kitchen utensil's technical field specifically, relates to an oil cleaner screen for cigarette machine and have this cigarette machine that is used for oil cleaner screen of cigarette machine.

Background

The smoke machine is a kitchen electrical appliance for purifying the kitchen environment, is arranged above a kitchen range, can quickly pump away waste burnt by the range and oil smoke harmful to human bodies generated in the cooking process, and discharges the waste and the oil smoke out of the room, thereby reducing pollution and purifying air.

The cigarette machine can produce the noise at the during operation often, influences user's use experience. In the prior art, a silencing cotton or a structure with a silencing function is arranged in a cigarette machine to absorb noise and avoid the outward propagation of the noise.

However, in practice, the noise of the cigarette machine is still large, resulting in poor use experience for the user.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, there is provided an oil filter screen for a range hood, wherein an air inlet hole is provided on the oil filter screen for the range hood, a hollow cavity is provided around the air inlet hole, the cavity has an opening, and the opening is located on the windward side of the oil filter screen for the range hood and/or on the side wall of the air inlet hole.

When the cigarette machine works, the fan generates negative pressure in the cigarette machine, so that air outside the cigarette machine flows to the interior of the cigarette machine. The air entering the interior of the range hood firstly passes through the oil filter screen and enters the flue through the air inlet hole. The air generates larger noise in the process of high-speed flowing outside the air inlet hole and in the process of collision between the air and the oil filter screen. The noise is not considered and processed in the prior art, so that the noise reduction effect of the existing range hood is not ideal. When adopting the utility model provides a during the oil cleaner screen, the sound wave of the outside noise of oil cleaner screen and the inside noise of fresh air inlet can get into the cavity by the opening. The sound waves entering the cavity may be attenuated by multiple reflections within the cavity. Therefore, the noise generated by high-speed airflow near the air inlet hole and the noise generated by collision with the oil filter screen can be prevented from being transmitted, and the purpose of reducing the noise is achieved. In addition, the oil cleaner screen is installed in the air intake department of cigarette machine, and the user regularly can wash the oil cleaner screen, washs the in-process of oil cleaner screen in daily life, just can wash the cavity, can guarantee from this that the cavity has good sound absorption effect. Compared with the existing noise reduction device arranged in the cigarette machine, the cigarette machine noise reduction device is easier to perform daily maintenance.

Illustratively, the cavity is a helmholtz resonator. The cavity is set to be a Helmholtz resonant cavity, so that the noise reduction effect is good, a mathematical model can be provided for the cavity, and the mathematical calculation is convenient.

Illustratively, the oil screen for the range hood comprises a split oil screen body and an oil screen rear cover, wherein the oil screen rear cover is connected to the back of the oil screen body, and a part of the cavity is formed in the oil screen rear cover.

Because the oil net rear cover is arranged on the back of the oil net body, the oil net rear cover is difficult to see when being observed from the front of the oil net body, so that the front of the oil net body is clean, tidy and smooth, and the cleaning is convenient. In addition, the oil screen body and the oil screen rear cover are separated, and a part of the cavity is formed in the oil screen rear cover, so that the processing difficulty of the cavity is reduced, the yield is improved, the product cost is reduced, and enough space is provided for arranging the cavity.

Exemplarily, a plurality of grooves are arranged on the surface of the oil screen rear cover facing the oil screen body, a plurality of through holes are arranged on the oil screen body, and the plurality of grooves are communicated with the plurality of through holes in a one-to-one correspondence manner to form a plurality of cavities.

Through set up the recess on the oil screen rear cover and set up the cavity that the through-hole formed on the oil screen body, can be so that the simple structure of oil cleaner screen, processing is convenient, easily realizes.

Illustratively, the oil screen rear cover is elongated. In the oil filter screen with the strip-shaped air inlet holes, the strip-shaped oil screen rear cover can be arranged between the two adjacent air inlet holes, so that a plurality of grooves are formed in one oil screen rear cover, a structure with a plurality of cavities is formed, the oil screen rear cover can be prevented from shielding the air inlet holes, and air can smoothly enter the range hood through the oil filter screen.

Illustratively, the plurality of grooves are all equal in volume. Therefore, the plurality of cavities can realize the sound absorption effect to the noise of the same frequency to the maximum extent. Meanwhile, the volumes of the grooves are equal, the processing is convenient, and the cost is reduced.

Illustratively, the volumes of at least a portion of the plurality of grooves are unequal. According to the Helmholtz resonance principle, the volume of the cavity is different, so that the sound with different frequencies can be weakened, the frequency range of absorbing noise can be enlarged, the noise generated under a plurality of gears of the smoke machine can be absorbed by the oil filter screen, and the application range is enlarged.

Illustratively, the quantity of the air inlet holes is a plurality, and the cavity is arranged between the adjacent air inlet holes. Because the air flow rate around the air inlet holes is large and the collision with the oil filter screen is severe, the cavity is arranged between the adjacent air inlet holes, the space utilization rate of the cavity on the oil filter screen can be improved, the cavity can be close to a noise source to the greatest extent, and the transmission of noise is weakened from the sound production source.

Illustratively, the air inlet hole is the slot hole, and a plurality of air inlet holes set up side by side along their width direction, and evenly distributed has a plurality of cavitys between the adjacent air inlet hole. Because the air inlet and the cavity are uniformly distributed, the noise can be absorbed more evenly, and the sound absorption effect is good. The device also has the advantages of simple structure and easy processing.

According to another aspect of the utility model, a cigarette machine is provided, the cigarette machine has the air intake, the cigarette machine includes the above any kind of oil cleaner screen that is used for the cigarette machine, an oil cleaner screen cover for the cigarette machine is on the air intake.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of an oil filter screen for a range hood according to an exemplary embodiment of the present invention;

FIG. 2 is another perspective view of the oil filter screen for the range hood of FIG. 1;

figure 3 is a schematic view of a cavity of an oil filter screen for a range hood according to an exemplary embodiment of the present invention;

FIG. 4 is a front view of the oil filter screen of FIG. 1 for a range hood;

FIG. 5 is a cross-sectional view of the oil screen of FIG. 4 for a range hood;

FIG. 6 is a perspective view of the oil screen rear cover of the oil screen for the range hood of FIG. 1; and

figure 7 is a perspective view of a cigarette machine according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. an oil filter screen; 101. an air inlet hole; 102. a cavity; 103. an opening; 104. the abdomen; 105. a neck portion; 200. an oil screen body; 201. a through hole; 300. an oil screen rear cover; 301. and (4) a groove.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

As shown in fig. 1, 2 and 4, the present invention provides an oil filter screen 100 for a range hood, hereinafter simply referred to as oil filter screen 100. The oil filter screen 100 covers the air inlet of the range hood to filter the oil smoke.

An air inlet hole 101 is provided on the oil screen 100. The air inlet 101 may be in various shapes, such as circular, oval, square, strip, etc. During the operation of the range hood, the oil smoke can enter the air channel of the range hood from the air inlet hole 101 through the oil filter screen 100 and be discharged. Typically, the oil screen 100 has oppositely disposed windward and leeward sides, the windward side facing the exterior of the range hood and the leeward side facing the interior of the range hood. As shown in fig. 3, a hollow cavity 102 is further provided around the air inlet hole 101. The cavity 102 has an opening 103, and the opening 103 of the cavity 102 may be located on the windward side of the oil screen 100. In the case where the oil screen 100 has a certain thickness, that is, the air inlet holes 101 have a certain length along the extending direction thereof, the openings 103 of the cavities 102 may be provided on the side walls of the air inlet holes 101, not shown. Of course, a combination of the two above approaches may also be used. That is, the opening 103 of the cavity 102 is provided on both the windward side of the oil screen 100 and the side wall of the air inlet hole 101. The cavity 102 may have any shape, and may be a straight blind hole, a sphere, a cube, or the like. Fig. 3 shows a schematic view of the chamber 102 according to a preferred embodiment of the present invention.

When the cigarette machine works, the fan generates negative pressure in the cigarette machine, so that air outside the cigarette machine flows to the interior of the cigarette machine. Air entering the interior of the range hood will first pass through the oil screen 100 and enter the flue through the air inlet openings 101. The inventor finds that: the air generates a large noise both during the high speed flow of the air outside the inlet openings 101 and during the collision of the air with the oil screen 100. The noise is not considered and processed in the prior art, so that the noise reduction effect of the existing range hood is not ideal. When the oil filter screen 100 provided by the utility model is adopted, the sound wave of the noise outside the oil filter screen 100 and the noise inside the air inlet 101 can enter the cavity 102 through the opening 103. The sound waves entering the cavity 102 may be attenuated by multiple reflections within the cavity 102. Therefore, the arrangement can prevent the noise generated by high-speed airflow near the air inlet hole 101 and the noise generated by collision with the oil filter screen 100 from spreading, so as to achieve the purpose of reducing noise.

In addition, the oil filter screen 100 is installed at the air inlet of the range hood, a user can clean the oil filter screen 100 regularly, and the cavity 102 can be cleaned in the daily process of cleaning the oil filter screen 100, so that the cavity 102 can be guaranteed to have a good sound absorption effect. Compared with the existing noise reduction device arranged in the cigarette machine, the cigarette machine noise reduction device is easier to perform daily maintenance.

Further, the cavity 102 may be a helmholtz resonator. In a typical helmholtz resonator, the belly 104 of the cavity 102 is larger in size than the neck 105, as shown in figure 3. The sound generates strong resonance inside the cavity 102, and air molecules rub with the side wall of the cavity 102 violently, thereby consuming a large amount of sound energy and absorbing sound. When the helmholtz resonant cavity absorbs sound, the sound absorption frequency characteristic curve is in a peak shape, when the sound frequency is closer to the resonance frequency of the helmholtz resonant cavity, the sound absorption effect is more obvious, and when the sound frequency is more different from the resonance frequency of the helmholtz resonant cavity, the sound absorption effect is weakened. By varying the size of the opening 103, the length of the neck 105 and the volume of the abdomen 104, the frequency at which the helmholtz resonator absorbs sound can be varied. The cavity 102 is set to be a helmholtz resonant cavity, which has good noise reduction effect and can provide a mathematical model for the cavity, thereby facilitating mathematical calculation.

Illustratively, as shown in fig. 1-3 and 5, the oil screen 100 includes an oil screen body 200 and an oil screen rear cover 300. The oil screen body 200 and the oil screen rear cover 300 are separated, and the oil screen rear cover 300 is connected to the back surface of the oil screen body 200, that is, the leeward surface described above. The oil screen rear cover 300 and the oil screen body 200 may be connected in any connection manner. A portion of cavity 102 is formed in oil screen rear cover 300. Thus, there is enough space to provide the cavity 102 with a certain depth. The oil screen rear cover 300 may be integrally formed, or may be formed by splicing a plurality of plates. The oil screen rear cover 300 may be formed in any suitable manner as long as its function can be achieved.

Because oil net rear cover 300 sets up at the back of oil net body 200, so observe from the front of oil net body 200 and be difficult to see, this just makes the front of oil net body 200 clean and tidy, smooth, clean convenient. Moreover, since the oil screen body 200 and the oil screen rear cover 300 are separated and a part of the cavity 102 is formed in the oil screen rear cover 300, the processing difficulty of the cavity 102 is reduced, the yield is improved, the product cost is reduced, and a sufficient space is provided for arranging the cavity 102.

Further, as shown in fig. 6, a plurality of grooves 301 are provided on a surface of the oil screen rear cover 300 facing the oil screen body 200. The recess 301 may be part of the cavity 102. The oil screen body 200 is provided with a plurality of through holes 201, and the through holes 201 penetrate through the windward side and the leeward side of the oil screen body 200. The oil screen rear cover 300 sets the groove 301 facing the oil screen body 200, and connects the oil screen rear cover 300 with the oil screen body 200. The grooves 301 are communicated with the through holes 201 in a one-to-one correspondence manner to form the cavities 102. That is, each cavity 102 includes a through hole 201 provided on the oil screen body 200 and a groove 301 on the oil screen rear cover 300, which together form the cavity 102. Noise can pass through the oil screen body 200 through the through holes 201 and enter the grooves 301 of the oil screen rear cover 300, and the volume of the noise is weakened in the cavity 102 formed by the grooves 301 and the through holes 201.

Through set up recess 301 on oil screen rear cover 300 and set up cavity 102 that through-hole 201 formed on oil screen body 200 for oil screen 100's simple structure, processing is convenient, easily realizes.

Illustratively, the oil screen rear cover 300 is elongated. A plurality of grooves 301 may be formed in the elongated oil screen rear cover 300, and the grooves 301 may be arranged in parallel. In the oil filter screen 100 with the strip-shaped air inlet holes 101, the strip-shaped oil screen rear cover 300 can be arranged between two adjacent air inlet holes 101, namely, a plurality of grooves 301 are formed in one oil screen rear cover 300, so that a structure with a plurality of cavities 102 is formed, the oil screen rear cover 300 can be prevented from shielding the air inlet holes 101, and air can smoothly enter the range hood through the oil filter screen 100.

In one embodiment, the plurality of grooves 301 are all equal in volume, i.e., the cavities 102 formed in the oil screen 100 have the same volume. In this way, multiple cavities 102 can achieve the maximum sound absorption effect for the same frequency of noise. Meanwhile, the volumes of the grooves 301 are equal, so that the processing is facilitated, and the cost is reduced.

In another embodiment, the volume of at least a portion of the plurality of grooves 301 is unequal. That is, the volume of the cavity 102 enclosed by the grooves 301 may be different every time, or the grooves 301 may have specifications with different sizes, so as to implement the cavities 102 with different volumes. According to the Helmholtz resonance principle, the volume of the cavity 102 is different, so that the sound with different frequencies can be weakened, the frequency range of noise absorption can be enlarged, the noise generated under a plurality of gears of the range hood can be absorbed by the oil filter screen 100, and the application range is enlarged.

Illustratively, the number of the air inlet holes 101 is plural, and the cavity 102 is disposed between the adjacent air inlet holes 101. Referring to the embodiment shown in fig. 1-2, the cavities 102 can be disposed in ribs between adjacent air inlet openings 101. Because the air flow rate around the air inlet holes 101 is large and the air inlet holes collide with the oil filter screen 100 violently, the cavity 102 is arranged between the adjacent air inlet holes 101, so that the space utilization rate of the cavity 102 on the oil filter screen 100 can be improved, the air inlet hole can be close to a noise source to the greatest extent, and the transmission of noise is weakened from a sound source.

Illustratively, the air inlet holes 101 are long holes, a plurality of air inlet holes 101 are arranged side by side along the width direction thereof, and a plurality of cavities 102 are uniformly distributed between adjacent air inlet holes 101. In one embodiment, between two adjacent air inlet openings 101, the same number of cavities 102 are provided, and the air inlet openings 101 are equally spaced. Because the air inlet holes 101 and the cavity 102 are uniformly distributed, the noise absorption is more even, and the sound absorption effect is good. The device also has the advantages of simple structure and easy processing.

According to another aspect of the present invention, there is provided a range hood, as shown in fig. 7, having an air inlet, further comprising any one of the oil filter screens 100 described above for the range hood, the oil filter screen covering the air inlet.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The oil filter screen for the range hood is provided with an air inlet hole, and is characterized in that a hollow cavity is arranged around the air inlet hole, the cavity is provided with an opening, and the opening is positioned on the windward side of the oil filter screen for the range hood and/or the side wall of the air inlet hole.

2. The oil filter screen for a cigarette machine of claim 1 wherein the cavity is a helmholtz resonator.

3. The oil filter screen for a range hood according to claim 1, wherein the oil filter screen for a range hood comprises a separate oil screen body and an oil screen rear cover, the oil screen rear cover is attached to a rear surface of the oil screen body, and a portion of the cavity is formed in the oil screen rear cover.

4. The oil screen for the range hood as claimed in claim 3, wherein a plurality of grooves are provided on the surface of the oil screen rear cover facing the oil screen body, a plurality of through holes are provided on the oil screen body, and the plurality of grooves and the plurality of through holes are communicated in a one-to-one correspondence to form a plurality of cavities.

5. The oil screen for a cigarette machine according to claim 4, characterized in that the oil screen rear cover is long.

6. The oil screen for a cigarette machine according to claim 4, wherein the plurality of grooves are all equal in volume.

7. The oil screen for a cigarette machine of claim 4, wherein at least a portion of the plurality of grooves are unequal in volume.

8. The oil screen for a cigarette machine as claimed in claim 1, wherein the number of the air inlet holes is plural, and the cavity is provided between the adjacent air inlet holes.

9. The oil screen for a cigarette machine according to claim 8, characterized in that the air inlet holes are long holes, a plurality of the air inlet holes are arranged side by side along the width direction thereof, and a plurality of the cavities are uniformly distributed between the adjacent air inlet holes.

10. A range hood, the range hood having an air intake, wherein the range hood comprises an oil filter screen for a range hood as claimed in any one of claims 1 to 9, the oil filter screen for a range hood overlying the air intake.