CN218328300U - Smoke exhaust ventilator - Google Patents

Abstract

The application provides a modified smoke ventilator. One embodiment of the application relates to a range hood, which comprises an airflow channel, an electrostatic oil fume filtering device (8) arranged in the airflow channel and an active noise reduction device; the active noise reduction device comprises a microphone (11), a loudspeaker (12) and a control module; the microphone (11) and the loudspeaker (12) are electrically connected to the control module; the microphone (11) is positioned at the downstream of the electrostatic oil fume filtering device (8) along the flowing direction of the oil fume gas flow in the gas flow channel. This helps reduce grease adhesion to the microphone.

Description

Smoke exhaust ventilator

[ technical field ] A method for producing a semiconductor device

The application relates to the range hood field.

[ background of the invention ]

In asian regions, the oil content of the fumes produced during cooking is particularly high due to traditional cooking practices of stir-frying. Therefore, a range hood for exhausting oil smoke generated during cooking becomes an important household appliance essential in daily life at home. With the increasing demand of people for living quality, the noise problem of the range hood becomes the focus of attention increasingly. In the field of range hoods, schemes adopting active noise reduction technology are proposed. However, the airflow in the range hood is not stable, and eddy current is easy to generate, which affects the stability of the signal collected by the microphone of the active noise reduction module to a certain extent, and further affects the noise reduction effect. In addition, the microphone and the loudspeaker of the active noise reduction module are easy to be attached with grease, so that the service life is influenced, and the noise reduction effect is also influenced. Therefore, the active noise reduction scheme of the existing range hood is not ideal, and needs to be further improved.

Unless otherwise supported by sufficient evidence, the prior art described herein is not meant to be an admission that such prior art is widely known to those of ordinary skill in the art to which this application pertains prior to the filing date of the present application.

[ summary of the invention ]

It is an object of embodiments of the present application to address at least one of the above technical problems and to provide an improved range hood.

One embodiment of the application relates to a range hood, which comprises an airflow channel, an electrostatic oil fume filtering device arranged in the airflow channel and an active noise reduction device; the active noise reduction device comprises a microphone, a loudspeaker and a control module; the microphone and the loudspeaker are electrically connected with the control module; and the microphone is positioned at the downstream of the electrostatic oil fume filtering device along the flowing direction of the oil fume gas flow in the gas flow channel. This helps reduce grease adhesion to the microphone.

In one possible design, the speaker is located downstream or upstream of the electrostatic lampblack filter device in the flow direction of the lampblack stream in the airflow channel.

In one possible design, the electrostatic lampblack filter device comprises a shell, an ionization wire, a high-voltage polar plate and a grounding polar plate; the housing includes an air inlet and an air outlet; the air outlet is positioned right above the air inlet; the ionization wire, the high-voltage polar plate and the grounding polar plate are arranged in the shell; the high-voltage polar plate and the grounding polar plate are both vertically arranged to form an exhaust channel extending along the vertical direction. Therefore, the exhaust channel of the electrostatic oil fume filtering device guides the flow of oil fume flow, vortex flow is avoided or reduced, and the microphone is located at the downstream of the exhaust channel, so that the noise reduction effect is promoted.

In one possible design, the air conditioner comprises a fan which is positioned right above the air outlet; the microphone is arranged between the fan and the air outlet; the active noise reduction device is suitable for reducing noise generated by the fan.

In one possible design, the device comprises a machine shell and a smoke collecting hood which are arranged in sequence from top to bottom; the casing surrounds and forms the airflow channel; the electrostatic oil fume filtering device, the microphone and the loudspeaker are all arranged in the shell; the microphone and the loudspeaker are both arranged on the inner wall of the casing.

In a possible design, a first groove with an opening facing the airflow channel is arranged on the inner wall of the casing; the microphone is embedded in the first groove. Therefore, the microphone noise reduction device is not only beneficial to reducing grease adhesion on the microphone, but also beneficial to improving the noise reduction effect.

In a possible design, a second groove with an opening facing the airflow channel is arranged on the inner wall of the casing; the loudspeaker is embedded in the second groove. Therefore, the method is not only beneficial to reducing grease adhesion on the loudspeaker, but also beneficial to improving the noise reduction effect.

In one possible design, the number of microphones is plural, and the microphones are arranged around the air flow discharged from the exhaust passage. Therefore, the noise reduction effect is improved.

In one possible design, the air flow channel is provided with a side opening; the electrostatic lampblack filtering device is arranged to be suitable for being inserted into the airflow channel in the horizontal direction through the side opening; the microphone and/or speaker being arranged to be adapted for servicing through the side opening. Therefore, the microphone and/or the loudspeaker are convenient to overhaul, and the microphone and/or the loudspeaker and the electrostatic oil fume filtering device share the side opening, so that the cost is saved.

In one possible embodiment, the electrostatic soot filter is overall rectangular.

In this case, the directional expressions such as "directly above", "vertical direction", "side opening", "horizontal direction", "ceiling wall" and the like in the present application are based on the usual use state of the range hood, unless otherwise specified.

It should be noted that the appearances of "first" and "second" in this specification are for illustrative purposes only and are not intended to indicate relative importance; moreover, it is not a definition of the number of features that it defines; further, it is not a definition of a logical or sequential relationship to the features it defines.

The above summary of the present application is not intended to describe all possible implementations of the present application. Throughout this application, guidance is provided through lists of examples, which can be used in various possible combinations.

[ description of the drawings ]

The following drawings are merely illustrative and explanatory of the present application and do not limit the scope of the present application, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a range hood of the present application;

FIG. 2 is a top plan view of the range hood embodiment of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a portion of the range hood embodiment of FIG. 1;

FIG. 5 is a schematic structural view of another range hood embodiment of the present application;

FIG. 6 is a top view of the range hood embodiment of FIG. 5;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

fig. 8 is a partial schematic structural view of the range hood embodiment shown in fig. 5.

Reference numerals:

1-shell, 2-smoke collecting hood, 3-electrical box, 4-air duct base, 5-filter screen, 6-oil cup, 7-centrifugal fan, 8-electrostatic oil smoke filtering device, 9-air inlet, 10-air outlet, 11-microphone, 12-loudspeaker and 13-cover plate.

[ detailed description ] A

To make the objects, solutions and advantages of the present application more clear, the present application will be further described with reference to the accompanying drawings and preferred embodiments.

The application provides a smoke ventilator embodiment, including casing 1, collection petticoat pipe 2, electrical apparatus box 3, tuber pipe seat 4, filter screen 5, oil cup 6, centrifugal fan 7, the initiative falls the device of making an uproar, airflow channel and electrostatic oil smoke filter equipment 8, as shown in fig. 1 to 4. The oil cup 6 is hung at the bottom of the fume collecting hood 2. And a housing 1 surrounding to form an air flow passage. The centrifugal fan 7 is disposed in the casing 1. Specifically, the centrifugal fan 7 is disposed in the airflow passage.

The machine shell 1 and the smoke collecting hood 2 are arranged from top to bottom in sequence. The electrical box 3 and the wind pipe seat 4 are both arranged on the top wall of the machine shell 1, as shown in fig. 1 to 4. The smoke collecting cover 2 is provided with a smoke collecting cavity, an airflow inlet is arranged in the smoke collecting cavity, and the filter screen 5 is arranged at the airflow inlet, as shown in figure 1. When the centrifugal fan 7 operates, negative pressure is generated to form oil smoke gas flow, and the oil smoke gas flow sequentially flows through the smoke collecting cavity, the filter screen 5, the air flow channel and the air pipe seat 4 and then is discharged into the public flue through the smoke discharge pipe connected between the air pipe seat 4 and the public flue.

The active noise reduction device comprises a microphone 11, a loudspeaker 12 and a control module. The control module is arranged in the electrical box 3. And the microphone 11 and the loudspeaker 12 are electrically connected to the control module. The outer surface of the microphone 11 is provided with an oil-proof coating, and a windshield is further arranged outside the oil-proof coating. Preferably, the windshield is made of foam. The speaker 12 is externally coated with foam, and an oil-proof coating is provided on the outer surface of the foam.

Along the flowing direction of the oil smoke gas flow in the gas flow channel (i.e. the direction from bottom to top), the microphone 11 is positioned at the downstream of the electrostatic oil smoke filtering device 8, as shown in fig. 3 and 4; in other words, when the centrifugal fan 7 operates, the oil smoke flows through the electrostatic oil smoke filtering device 8 and then through the microphone 11. Because the oil smoke gas flow is filtered by the electrostatic oil smoke filtering device 8, the oil smoke gas flow is cleaner when flowing to the microphone 11, which is beneficial to reducing the grease adhesion on the microphone 11.

Along the flowing direction of the oil smoke gas flow in the gas flow channel, the microphone 11 and the loudspeaker 12 are both positioned at the downstream of the filter screen 5; in other words, when the centrifugal fan 7 is operated, the oil smoke flows through the filter 5, and then sequentially flows through the speaker 12 and the microphone 11. Since the oil smoke gas flow is pre-filtered by the filter 5, it helps to reduce grease adhesion on the microphone 11 and the speaker 12.

The centrifugal fan 7, the electrostatic oil fume filtering device 8, the microphone 11 and the loudspeaker 12 are all arranged in the machine shell 1. Specifically, the centrifugal fan 7, the microphone 11, the electrostatic lampblack filter 8 and the loudspeaker 12 are sequentially arranged in the airflow channel from top to bottom, as shown in fig. 3 and 4.

The speaker 12 is located upstream of the electrostatic lampblack filtering device 8 in the flow direction of the lampblack gas flow in the gas flow channel, as shown in fig. 3 and 4; in other words, when the centrifugal fan 7 operates, the oil smoke flows through the speaker 12 and then through the electrostatic oil smoke filtering device 8.

An Active Noise Cancellation (ANC) technique, also called Active Noise Control (ANC) technique, is used by an Active Noise reduction device, and is a technique for emitting a sound signal with a phase opposite to that of a Noise signal detected by the microphone 11 and a frequency and an amplitude identical to or as close as possible to each other through the speaker 12, and interfering with the Noise signal to cancel sound waves.

The electrostatic oil smoke filter 8 is a rectangular solid. Specifically, the electrostatic lampblack filter device 8 comprises a shell, an ionization wire, a high-voltage polar plate and a grounding polar plate. The housing comprises an air inlet 9 and an air outlet 10. And the air outlet 10 is positioned right above the air inlet 9. The ionization wire, the high-voltage polar plate and the grounding polar plate are arranged in the shell. The high-voltage polar plate and the grounding polar plate are both vertically arranged to form an exhaust channel extending along the vertical direction; in other words, the two adjacent electrode plates in each high-voltage electrode plate and each ground electrode plate are spaced to form an exhaust passage extending in the vertical direction, and a plurality of exhaust passages parallel to each other are formed in total. When the centrifugal fan 7 operates, the oil fume flow flows through the exhaust passage from bottom to top approximately along the vertical direction, the oil fume flow is smooth and stable, and eddy current is avoided or reduced, so that a noise signal detected by the microphone 11 is more stable, and the noise reduction effect of the active noise reduction device is favorably improved.

The electrostatic oil fume filtering device 8 is a device for collecting oil fume particles in oil fume flow by utilizing the working principle of ionization and adsorption. Specifically, the electrostatic lampblack filter device 8 ionizes gas molecules in the air by using a high-voltage direct-current electric field, and charges lampblack particles, bacteria and the like in the air in the moving process, so that the charged lampblack particles and bacteria are adsorbed by a polar plate in the electrostatic lampblack filter device 8, and efficient lampblack filtration is realized. The electrostatic oil fume filtering device 8 works under a high voltage condition, and the voltage can reach thousands of volts or even tens of thousands of volts.

And the centrifugal fan 7 is positioned right above the air outlet 10, as shown in fig. 3 and 4. And a microphone 11 disposed between the centrifugal fan 7 and the air outlet 10. Active noise reducing means arranged to reduce noise generated by the centrifugal fan 7.

The electrostatic lampblack filter 8, the microphone 11 and the loudspeaker 12 are all arranged in the cabinet 1, as shown in fig. 4. A microphone 11 and a speaker 12, both disposed on the inner wall of the cabinet 1. The microphone 11 is located above the speaker 12. In the configuration shown in fig. 4, the centrifugal fan 7, the electrostatic oil smoke filter 8, the microphone 11, and the speaker 12 are exposed because the front baffle of the housing 1 is not yet attached. When the electrostatic oil fume filtering device 8, the microphone 11 and the loudspeaker 12 need to be overhauled or cleaned, the front baffle plate of the machine shell 1 is detached.

The number of the microphones 11 is plural and is arranged around the air flow discharged from the discharge passage as shown in fig. 4.

The number of the speakers 12 is plural, and is set around the air flow flowing into the air intake port 9, as shown in fig. 4.

The foregoing is merely one embodiment of the present application and other embodiments may be devised by adding, deleting, modifying or replacing certain features. For example, as shown in fig. 5 to 8, the microphone 11 and the speaker 12 may be located downstream of the electrostatic oily fume filter 8 in the flow direction of the oily fume flow in the airflow passage. The microphone 11 is located above the speaker 12. And an air flow passage provided with a side opening. Specifically, the casing 1 is rectangular in shape as a whole, and a side opening is provided at a front side wall of the casing 1. And an electrostatic type oil smoke filtering device 8 which is arranged to be inserted into the airflow channel in the horizontal direction through the side opening. A microphone 11 and a loudspeaker 12 are provided adapted to be serviced through the side opening. As shown in fig. 8, the electrostatic oil smoke filter 8 is inserted into the airflow path through the side opening, and then the side opening is closed by the cover plate 13. In the configuration shown in fig. 8, the centrifugal fan 7, the microphone 11, and the speaker 12 are exposed because the front baffle of the casing 1 is not yet attached. When the microphone 11 and the speaker 12 are repaired after sale, the front baffle does not need to be detached, and the electrostatic lampblack filter 8 can be horizontally pulled out from the airflow channel through the side opening by detaching the cover plate 13, and then the microphone 11 and the speaker 12 can be repaired through the side opening.

For another example, a first groove with an opening facing the airflow channel may be disposed on an inner wall of the housing. The microphone is embedded in the first groove. The first recess is integrally formed by stamping the housing.

For another example, a second groove with an opening facing the airflow channel may be disposed on the inner wall of the housing. The loudspeaker is embedded in the second groove. The second recess is integrally formed by stamping the housing.

The elements of the different embodiments may be combined with each other in any feasible manner to achieve the object of the application.

It should be additionally noted that the present application should not be construed as limited to the above-described embodiments, but rather should be construed to cover all possible embodiments as determined by the claims that follow when taken in conjunction with the disclosure herein. Therefore, any simple modifications, equivalent changes and modifications of the above embodiments according to the technical essence of the present application are within the protection scope of the present application, without departing from the content of the present application.

Claims (10)

1. The utility model provides a range hood, includes airflow channel and sets up in electrostatic oil smoke filter equipment (8) in the airflow channel, its characterized in that:

the active noise reduction device is also included;

the active noise reduction device comprises a microphone (11), a loudspeaker (12) and a control module;

the microphone (11) and the loudspeaker (12) are electrically connected to the control module;

the microphone (11) is positioned at the downstream of the electrostatic oil fume filtering device (8) along the flowing direction of the oil fume gas flow in the gas flow channel.

2. The range hood of claim 1, wherein:

the loudspeaker (12) is positioned at the downstream or the upstream of the electrostatic oil fume filtering device (8) along the flowing direction of the oil fume gas flow in the gas flow channel.

3. The range hood of claim 2, wherein:

the electrostatic oil fume filtering device (8) comprises a shell, an ionization wire, a high-voltage polar plate and a grounding polar plate;

the housing comprises an air inlet (9) and an air outlet (10);

the air outlet (10) is positioned right above the air inlet (9);

the ionization wire, the high-voltage polar plate and the grounding polar plate are arranged in the shell;

the high-voltage polar plate and the grounding polar plate are both vertically arranged to form an exhaust channel extending along the vertical direction.

4. The range hood of claim 3, wherein:

comprises a fan which is positioned right above the air outlet (10);

the microphone (11) is arranged between the fan and the air outlet (10);

the active noise reduction device is suitable for reducing noise generated by the fan.

5. The range hood of claim 4, wherein:

comprises a casing (1) and a smoke collecting hood which are arranged in sequence from top to bottom;

the casing (1) surrounds and forms the airflow channel;

the electrostatic oil fume filtering device (8), the microphone (11) and the loudspeaker (12) are all arranged in the shell (1);

and the microphone (11) and the loudspeaker (12) are arranged on the inner wall of the shell (1).

6. The range hood of claim 5, wherein:

a first groove with an opening facing the airflow channel is formed in the inner wall of the machine shell (1);

the microphone (11) is embedded in the first groove.

7. The range hood of claim 5, wherein:

a second groove with an opening facing the airflow channel is formed in the inner wall of the machine shell (1);

the loudspeaker (12) is embedded in the second groove.

8. The range hood of claim 3, wherein:

the number of the microphones (11) is a plurality, and the microphones are arranged around the air flow discharged from the exhaust passage.

9. The range hood of any one of claims 1 to 8, wherein:

the airflow channel is provided with a side opening;

the electrostatic lampblack filtering device (8) is arranged to be suitable for being inserted into the airflow channel in the horizontal direction through the side opening;

the microphone (11) and/or speaker (12) is arranged to be adapted for servicing through the side opening.

10. The range hood of claim 9, wherein:

the whole electrostatic type oil fume filtering device (8) is in a cuboid shape.

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