CN110986122A

CN110986122A - Sound guide device and range hood

Info

Publication number: CN110986122A
Application number: CN201911036395.XA
Authority: CN
Inventors: 艾穗江; 丁敏; 丁佳俐; 朱彩云
Original assignee: Guangdong Wanjiale Kitchen Technology Co Ltd
Current assignee: Guangdong Wanjiale Kitchen Technology Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-04-10

Abstract

The invention discloses a sound guide device for a range hood, which comprises a mounting seat, wherein the mounting seat comprises a cavity, a plurality of sound guide plates are arranged in the cavity, the cavity is divided into a plurality of sound guide channels by the plurality of sound guide plates, each sound guide channel comprises a depth and a width, and the ratio of the depth to the width of each sound guide channel is not less than 1. The research shows that the noise of the range hood is concentrated in a middle and high frequency range above 500HZ, the noise wavelength of the range hood is shorter, the range hood has certain directivity like short frequency waves such as light waves and the like, the noise transmitted from the exhaust inlet of the range hood is restrained (the most main noise is transmitted to the indoor path in actual use) through a plurality of sparse sound guide plates with certain depth, and the sound guide plates directionally transmit the sound waves in the middle and high frequency range to enable the sound waves not to directly emit to human ears, so that the noise intensity received by the human ears is reduced, and the use experience of people is improved.

Description

Sound guide device and range hood

Technical Field

The invention relates to the field of household appliances, in particular to a range hood.

Background

At present, the range hood becomes a popular electrical appliance for residents and families in China, and can be used for removing smoke generated during cooking and keeping the interior of a kitchen clean and healthy. However, the problem brought by the use of the range hood is strong noise generated by the fan, and housewives and kitchen operators who are under the noise for a long time can generate adverse reactions such as headache, dysphoria, palpitation and the like, thereby causing serious influence on the body health. Accordingly, the quiet range hood design has become a problem that manufacturers generally attach importance.

Noise reduction measures usually adopted for reducing noise mainly include noise reduction at a sound source, noise reduction during propagation, or active noise reduction. The noise reduction at the sound source is mainly realized by optimizing internal flow field structures such as an air duct and the like, for example, the front end radius of a volute tongue of a fan is improved, the gap between the outer edge of an impeller of the centrifugal fan and the volute tongue of the centrifugal fan is increased, the volute tongue of the centrifugal fan is designed in an inclined mode, and the like, so that the noise reduction purpose is achieved, the universality and the structural adaptability are poor, different external flow field structures need to be matched, and the universality is not strong only for specific products or products of the same series; noise reduction in the transmission process is mainly realized by adding sound-absorbing cotton or silencer equipment in the range hood, but after long-term use, the sound-absorbing cotton loses the noise reduction effect due to oil absorption, has low durability and hidden fire hazards, and the silencer equipment has high cost, increases air duct resistance and reduces air volume; and to the initiative of lampblack absorber and falling the noise, at present the most general way is at the inside initiative of arranging of cigarette machine and falls the device of making an uproar, but the lampblack absorber is in the in-service use process, and its inside cavity receives the oil smoke to influence, and the environment is very abominable, exposes the device of making an uproar of falling under the oil smoke environment, can receive the corruption of high temperature greasy dirt, influences the life, the system stability that fall the device of making an uproar, and simultaneously, the cost ratio of the.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the noise reduction equipment is simple in structure and capable of effectively reducing influence of noise of the cigarette machine on a human body.

The solution of the invention for solving the technical problem is as follows: the utility model provides a lead sound device for lampblack absorber, includes the mount pad, the mount pad includes the cavity, be equipped with the multi-disc in the cavity and lead the sound board, the multi-disc leads the sound board and separates into a plurality of sound channels of leading with the cavity, it includes degree of depth and width to lead the sound channel, the degree of depth and the width ratio of leading the sound channel are not less than 1.

The invention has the beneficial effects that: the research shows that the noise of the range hood is concentrated in a middle and high frequency range above 500HZ, the noise wavelength of the range hood is shorter, the range hood has certain directivity like short frequency waves such as light waves and the like, the noise transmitted from the exhaust inlet of the range hood is restrained (the most main noise is transmitted to the indoor path in actual use) through a plurality of sparse sound guide plates with certain depth, and the sound guide plates directionally transmit the sound waves in the middle and high frequency range to enable the sound waves not to directly emit to human ears, so that the noise intensity received by the human ears is reduced, and the use experience of people is improved.

As a further improvement of the technical scheme, the plurality of sound guide plates are arranged in the cavity at equal intervals, the distance between every two adjacent sound guide plates is the width of the sound guide channel, and the height of the cavity is the depth of the sound guide channel.

As a further improvement of the above technical solution, the distance between the two adjacent sound guide plates is L, and the value range of L is 20-50 mm; the height of the cavity is H, and the value range of H is 60-100 mm. The range hood is limited by the specification and the size of the existing range hood, and the sound guide device adopting the size does not influence the smoking effect of the range hood while having a better sound guide effect.

As a further improvement of the technical scheme, the included angle between the sound guide plate and the horizontal plane is a, and the value range of the a is 45-90 degrees. When a is less than 45 degrees, the sound guide plate increases the resistance of the oil smoke entering the air duct of the range hood, which is not beneficial to smoke suction; when a is more than 90 degrees, oil smoke can be guided to a user during cooking, and noise reduction of the user is not facilitated.

As a further improvement of the technical scheme, a connecting sheet is arranged outside the mounting seat. Through increasing the connection piece in the installation for this leading sound device can the direct mount on the cigarette machine, need not reform transform the inner structure of inhaling the range hood and just can realize making an uproar, has good commonality and adaptability.

As a further improvement of the technical scheme, the mounting seat comprises a fixed support plate, the fixed support plate is provided with a plurality of clamping grooves, and the sound guide plate is mounted on the clamping grooves. The sound guide plate can be freely disassembled and assembled through the clamping grooves, and the sound guide plate has better convenience.

As a further improvement of the technical scheme, the sound guide plate is made of an oil-proof material. The sound guide plate is made of materials which basically have no influence on the effect, plastics, metals and glass can be used, and oil-proof materials are preferred to prevent the sound guide plate from absorbing grease.

The invention also provides a range hood which comprises an air suction opening, wherein the sound guide device is arranged at the air suction opening. The range hood provided with the sound guide device has a good noise reduction effect.

As the further improvement of the technical scheme, the air suction opening further comprises a filter screen, and the sound guide device is arranged below the filter screen. The effect is best in the sound guide plate installation below the filter screen because sound passes through the sound guide device after transmitting the filter screen from the cigarette machine inside earlier for the noise of well high frequency and directional transmission. But in order to make the range hood more succinct pleasing to the eye, will lead the sound device and hug closely and install also certain noise reduction effect above the filter screen. When leading the sound device and installing in the filter screen top, the noise can produce certain scattering effect behind the filter screen after being directed for some noise after originally being directed is dispersed again and is propagated.

As a further improvement of the technical scheme, the sound absorption board is further arranged below the rear part of the shell. The noise of the whole space is effectively reduced by directing the directed noise to the position of the sound-absorbing plate and then absorbing the noise by the sound-absorbing plate. Meanwhile, the sound-absorbing plate is arranged outside the shell, so that the replacement is convenient.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a schematic structural diagram of a sound guide device according to the present invention;

FIG. 2 is a schematic structural view of a range hood of the present invention;

fig. 3 is a reference diagram for use of the sound guide device of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. The drawings illustrate a preferred embodiment of the invention and, together with the description, serve to complement the description with figures so that the person may visually and vividly understand each and every feature and every technical solution of the invention, but are not to be construed as limiting the scope of the invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions. Meanwhile, all technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Referring to fig. 1 to 3, the mute cigarette making machine comprises a cigarette making machine body 100, wherein an air suction opening is arranged below the cigarette making machine body 100, a filter screen 200 is arranged below the air suction opening, a sound guide device 300 is arranged below the filter screen, and the sound guide device 300 is fixed at the bottom of the cigarette making machine body 100.

The sound guide device 300 comprises a mounting seat 310, the mounting seat 310 comprises an outer frame 311 and a cavity 312, a plurality of sound guide plates 320 are mounted in the cavity 312, the sound guide plates 320 are arranged at equal intervals in the front-back direction, the front direction refers to the direction in which a person faces a cigarette making machine and is generally the direction in which the person operates the cigarette making machine, and the back direction refers to the mounting direction of the cigarette making machine and is generally the wall surface of a kitchen. The cavity 312 is divided into a plurality of sound guiding channels 330 by the sound guiding plates 320 and the outer frame 311, wherein the height of the outer frame 311 is H, and the range of the selected value of H may be: 60-100mm (according to the installation size of the bottom of the current common household cigarette machine), and the distance between two adjacent sound guide plates 320 is L, and the selected value range of L can be: 20-50mm, wherein the height of the outer frame 311 is the depth of the sound guide channel 330, and the distance between the sound guide plates 320 is the width of the sound guide channel 330, preferably, H is 60mm and L is 30mm in this embodiment, so the ratio of the depth to the width of the sound guide channel is H: and L is 2: 1. During operation, because the inside that the oil smoke need enter into the cigarette machine again through the sound guide plate earlier, consequently, the interval between the sound guide plate 320 should not be too little, otherwise can influence the effect of induced drafting of cigarette machine, and the interval between the sound guide plate 320 also can not be too big simultaneously, and too big interval can obviously reduce the effect of leading the sound, and the directionality effect of the transmission of sound wave worsens promptly.

Further as a preferred embodiment, the angle between the sound guiding plate 320 and the horizontal plane is a, and the value of a ranges from 45 ° to 90 °. Preferably, in this embodiment, a is 60 °. As can be seen from fig. 2, the sound guide plate 320 is inclined rearward from the horizontal plane.

Thus, after the noise passes through the sound guide 300, the noise in the middle and high frequency range of 500HZ or more is guided to be emitted backward, and when the noise collides with other articles in the kitchen, part of the noise is absorbed and part of the noise is scattered, so that the noise entering the ears of the person in front of the range hood can be reduced.

Through the experiment, we have carried out the cigarette machine noise contrast that increases leading sound device and do not increase leading sound device, and during the measurement, the measuring position is all in the place ahead of cigarette machine, and the position of probably people's ear is measured. The experimental data as given in table 1 below were obtained.

TABLE 1 Add acoustic pressure level noise test data before and after the leading sound board (ear position)

As can be seen from the above table, after the sound guide device 300 is added, the noise of partial frequency can be significantly reduced. Although the sound guide device 300 does not actually reduce national standard noise, the noise intensity received by the ear of an operator (a chef or a family cooking woman) can be effectively reduced through directional transmission of the noise, and the sound guide device plays a positive role. In the range hood, when the rotating speed of the fan is higher, the suction force is higher, and the noise is higher, as a consumer, the suction force of the range hood is expected to be higher and better, and the noise is also expected to be lower and better, and after the sound guide device 300 is added, the contradiction can be alleviated, so that a manufacturer of the range hood can develop the range hood with the better rotating speed and effectively reduce the influence of the noise of the range hood on a human body.

In a further preferred embodiment, a connection piece 313 is arranged outside the mounting seat 310. The sound guide device 300 can be directly installed on the cigarette machine body 100 by adding the connecting piece 313 on the installation seat 310, for example, the connecting piece 313 is fixedly installed with the outer shell of the cigarette machine body 100 through screws, and thus, the sound guide device 300 is fixedly installed.

This leading sound device 300 installs the outside at current cigarette machine additional to need not to reform transform the inner structure to inhaling the range hood and just can realize making an uproar, have good commonality and adaptability, tear open moreover and wash the convenience. For example, the user can purchase the sound guide device 300 separately and then add it to the existing cigarette making machine, so that a certain noise reduction effect can be achieved.

Or the cigarette machine manufacturer can install the sound guide device 300 under the exhaust inlet of the cigarette machine body when the cigarette machine is produced, so that the consistency of the product is better, and the cigarette machine is more beautiful and durable.

Further as a preferred embodiment, the mounting seat 310 further includes a fixing support 314, the fixing support 314 is provided with a plurality of slots, and the sound guiding plate 320 is mounted on the slots. The sound guide plate 320 can be freely disassembled and assembled through the clamping grooves, and the sound guide plate has better convenience.

It should be understood that the material of the sound guide 300 is not limited in this embodiment, and many materials available on the market can be used to make the sound guide, such as conventional materials such as plastic, metal or glass. Of course, in order to increase the service life of the sound guide device, it is preferable to manufacture the sound guide device by using an oil-proof material.

Further, as a preferred embodiment, a sound absorbing plate is arranged below the rear portion of the cigarette machine body 100. For example, by fixing the sound-absorbing plate on the wall surface, the noise in the cigarette machine is directed to the wall surface after passing through the sound guide device, and then the sound-absorbing plate is used for absorbing the part of the noise, so that the part of the noise is effectively reduced, the part of the noise is reflected and then dispersed in the whole kitchen again, and the part of the noise enters the ears of a human body, and the influence on the human body is caused. Meanwhile, the sound-absorbing plate is arranged outside the shell, so that the replacement is convenient.

In some embodiments, the sound guide 300 may also be mounted inside the cigarette maker, resting against the upper surface of the filter screen 200.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.

Claims

1. The utility model provides a sound guide device for lampblack absorber, its characterized in that: the sound guide device comprises a mounting seat, wherein the mounting seat comprises a cavity, a plurality of sound guide plates are arranged in the cavity, the cavity is divided into a plurality of sound guide channels by the sound guide plates, each sound guide channel comprises a depth and a width, and the depth-width ratio of each sound guide channel is not less than 1.

2. The sound guide device according to claim 1, wherein: the sound guide plates are arranged in the cavity at equal intervals, the distance between every two adjacent sound guide plates is the width of the sound guide channel, and the height of the cavity is the depth of the sound guide channel.

3. The sound guide device according to claim 2, wherein: the distance between the two adjacent sound guide plates is L, and the value range of L is 20-50 mm; the height of the cavity is H, and the value range of H is 60-100 mm.

4. The sound guide device according to claim 1, wherein: the angle between the sound guide plate and the horizontal plane is a, and the value range of a is 45-90 degrees.

5. The sound guide device according to claim 1, wherein: and a connecting sheet is arranged outside the mounting seat.

6. The sound guide device according to claim 1, wherein: the mounting seat comprises a fixed support plate, a plurality of clamping grooves are formed in the fixed support plate, and the sound guide plate is mounted on the clamping grooves.

7. The sound guide device according to claim 1, wherein: the sound guide plate is made of an oil-proof material.

8. The utility model provides a range hood, includes the inlet scoop, its characterized in that: the sound guide device as claimed in any one of claims 1 to 7 is installed at the suction opening.

9. The range hood of claim 8, wherein: the air suction opening further comprises a filter screen, and the sound guide device is installed below the filter screen.

10. The range hood of claim 8, wherein: the sound absorption board is arranged below the rear part of the shell.