CN218119838U - Smoke exhaust ventilator - Google Patents

Abstract

The application provides a modified smoke ventilator. The range hood comprises a centrifugal fan (1), an oil smoke pipeline (4) and a smoke collecting hood (5) which are sequentially arranged from top to bottom, wherein when the centrifugal fan (1) runs, airflow sequentially flows through the smoke collecting hood (5), the oil smoke pipeline (4) and the centrifugal fan (1), and an air inlet (2) of the centrifugal fan (1) is opened downwards to face the oil smoke pipeline (4); the active noise reduction device comprises a microphone (6), a loudspeaker (7) and a control module; the microphone (6) and the loudspeaker (7) are electrically connected to the control module; the microphone (6) and the loudspeaker (7) are both arranged in the oil smoke pipeline (4) and are suitable for reducing noise generated by the centrifugal fan (1). By adopting the technical scheme, the noise reduction effect can be obviously improved.

Description

Smoke exhaust ventilator

[ technical field ] A method for producing a semiconductor device

The application relates to the field of range hoods.

[ 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 extracting oil smoke generated during cooking becomes an important household appliance essential for 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. However, the existing noise reduction scheme of the range hood is not ideal, and needs to be further improved and 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 ]

An object of this application embodiment is to provide an improved smoke ventilator to above at least one technical problem.

One embodiment of the application relates to a range hood, which comprises a centrifugal fan, an oil smoke pipeline and a smoke collecting hood which are sequentially arranged from top to bottom, wherein when the centrifugal fan operates, airflow sequentially flows through the smoke collecting hood, the oil smoke pipeline and the centrifugal fan, and an air inlet of the centrifugal fan is opened downwards towards the oil smoke pipeline; the active noise reduction device comprises a microphone, a loudspeaker and a control module; the microphone and the loudspeaker are electrically connected to the control module; the microphone and the loudspeaker are both arranged in the fume pipeline and are suitable for reducing noise generated by the centrifugal fan. By adopting the technical scheme, the noise reduction effect can be obviously improved.

In one possible design, the microphone and the speaker are both disposed on an inner wall of the fume duct.

In one possible embodiment, the outer wall of the air inlet of the centrifugal fan is in contact with the inner wall of the oil smoke pipe.

In one possible design, the air inlet of the centrifugal fan and the oil smoke pipeline are both cylindrical; and the air inlet of the centrifugal fan is connected with the oil smoke pipeline.

In one possible design, the number of the loudspeakers is multiple, and the loudspeakers are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline; the number of the microphones is a plurality of, and the microphones are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline. Thus, the noise reduction effect is improved.

In one possible design, the oil smoke duct is cuboid; the inner wall of the oil smoke pipeline comprises a front wall, a right wall, a rear wall and a left wall which are sequentially connected; the front wall, the right wall, the rear wall and the left wall are respectively provided with at least one microphone; the front wall, the right wall, the rear wall and the left wall are respectively provided with at least one loudspeaker. Thus, the noise reduction effect is improved.

In one possible design, the number of the loudspeakers is multiple, and the loudspeakers are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline; the number of the microphones is multiple, and the microphones are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline; in the extending direction of the oil smoke pipeline, the microphone is arranged at least for two circles; in the extending direction of the oil smoke pipeline, the loudspeaker is arranged at least two circles. Thus, the noise reduction effect is improved.

In one possible design, a casing for accommodating the centrifugal fan is further included; and a sound absorbing material is filled between the shell and the centrifugal fan.

In one possible design, the fume duct extends in a vertical direction; the air outlet of the centrifugal fan is opened towards the horizontal direction.

In one possible design, the microphone is arranged at the top end opening of the oil smoke pipeline; the loudspeaker is arranged at the open position of the bottom end of the oil smoke pipeline.

In this case, the directional expressions such as "downward", "horizontal", "front", "right", "rear", "left" and the like in the present application are based on the usual use state of the range hood unless otherwise specified.

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 examples 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;

figure 2 is a cross-sectional view of the embodiment of the range hood shown in figure 1.

Reference numerals:

1-centrifugal fan, 2-air inlet, 3-air outlet, 4-oil smoke pipeline, 5-smoke collecting hood, 6-microphone, 7-loudspeaker, 8-smoke guide plate and 9-filter screen.

[ detailed description ] embodiments

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

The application provides a smoke ventilator embodiment, including centrifugal fan 1, oil smoke pipeline 4 and the collection petticoat pipe 5 that top-down set gradually, as shown in fig. 1 and 2. When the centrifugal fan 1 operates, airflow sequentially flows through the fume collecting hood 5, the fume pipeline 4 and the centrifugal fan 1. An air inlet 2 of the centrifugal fan 1 is opened downwards to face the oil smoke pipeline 4. The air outlet 3 of the centrifugal fan 1 is opened in the horizontal direction. The smoke collecting cavity of the smoke collecting cover 5 is hung with a smoke guide plate 8, and the smoke guide plate 8 and the smoke collecting cavity are formed with airflow inlets at intervals. The middle part of the smoke collecting cavity is provided with an exhaust port, the exhaust port is provided with a filter screen 9, and the smoke guide plate 8 is arranged below the filter screen 9, as shown in fig. 2.

The fume duct 4 extends in a vertical direction, as shown in fig. 1 and 2, i.e. the fume duct 4 extends in a direction substantially perpendicular to the horizontal plane. The top end of the oil smoke pipeline 4 extends upwards towards the air inlet 2 of the centrifugal fan 1, and the bottom end of the oil smoke pipeline 4 extends downwards towards the filter screen 9.

This smoke ventilator embodiment still includes the initiative and falls the device of making an uproar. The active noise reduction device comprises a microphone 6, a loudspeaker 7 and a control module. And the microphone 6 and the loudspeaker 7 are electrically connected to the control module. The microphone 6 and the speaker 7 are both disposed in the oil smoke pipe 4 and are configured to reduce noise generated by the centrifugal fan 1. Specifically, the microphone 6 and the speaker 7 are both disposed on the inner wall of the oil smoke pipe 4, as shown in fig. 2. The control module is arranged in the electrical box of the range hood embodiment.

Because the air inlet 2 of the centrifugal fan 1 is opened downwards to face the oil smoke pipeline 4, and because the microphone 6 and the loudspeaker 7 are both arranged in the oil smoke pipeline 4, the air inlet 2 of the centrifugal fan 1 is opened downwards to face the microphone 6 and the loudspeaker 7, and noise generated by the centrifugal fan 1 passes through the air inlet 2 to be transmitted towards the microphone 6 and the loudspeaker 7, so that the noise reduction effect is improved.

The air inlet 2 of the centrifugal fan 1 and the oil smoke pipeline 4 are both cylindrical. The air inlet 2 of the centrifugal fan 1 is concentrically arranged with the oil smoke pipeline 4, namely the central line of the air inlet 2 of the centrifugal fan 1 is coincident with the central line of the oil smoke pipeline 4.

The air inlet 2 of the centrifugal fan 1 is connected with the oil smoke pipeline 4, namely the air inlet 2 of the centrifugal fan 1 is directly connected with the oil smoke pipeline 4. Specifically, the outer wall of the air inlet 2 of the centrifugal fan 1 abuts against the inner wall of the oil smoke pipe 4, as shown in fig. 2.

When the centrifugal fan 1 operates, negative pressure is generated, and the formed airflow flows into the smoke collection cavity, flows through the airflow inlet, then passes through the filter screen 9 at the air outlet and then flows into the oil smoke pipeline 4. As shown in fig. 2, the oil smoke pipe 4 is open at both ends. When the centrifugal fan 1 operates, the bottom end opening of the oil smoke pipeline 4 receives the airflow flowing through the filter screen 9, then the airflow flows through the oil smoke pipeline 4, then flows out from the top end opening of the oil smoke pipeline 4, then flows into the air inlet 2 of the centrifugal fan 1, then is discharged from the air outlet 3 of the centrifugal fan 1, and is discharged into the public flue. It should be noted that, since the air flow is filtered by the filter net 9 before flowing into the oil smoke pipe 4, the adhesion of grease on the microphone 6 and the speaker 7 can be reduced to some extent.

The number of the loudspeakers 7 is a plurality, and the loudspeakers are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline 4. In the extending direction of the oil smoke pipe 4, the microphone 6 is arranged three turns. The number of the microphones 6 is a plurality, and the microphones are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline 4. In the extending direction of the oil smoke pipe 4, the speaker 7 is arranged three turns. The microphone 6 is closer to the noise source "centrifugal fan 1" than the corresponding speaker 7.

Here, it should be noted that the Active Noise reduction device employs an Active Noise reduction (ANC) technique, also called an Active Noise Control (ANC) technique, which is a technique for generating an acoustic signal with a phase opposite to that of the Noise and a frequency and an amplitude equal to or as close to each other as possible, and interfering with the Noise signal to cancel the acoustic wave.

The range hood embodiment further comprises a housing for accommodating the centrifugal fan 1, and sound-absorbing material is filled between the housing and the centrifugal fan 1, as shown in fig. 2. In particular, the filled sound absorbing material is sound absorbing cotton.

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, the oil smoke duct may be rectangular. The inner wall of the oil smoke pipeline comprises a front wall, a right wall, a rear wall and a left wall which are sequentially connected. The front wall, the right wall, the rear wall and the left wall are respectively provided with at least one microphone. The front wall, the right wall, the rear wall and the left wall are respectively provided with at least one loudspeaker. As another example, the centrifugal fan may be provided so as to be adapted to be disposed above the ceiling. For another example, the microphone may be disposed at the top opening of the oil smoke pipe, and the speaker may be disposed at the bottom opening of the oil smoke pipe; namely, the microphone is arranged at the open top end of the oil smoke pipeline, and the loudspeaker matched with the microphone is arranged at the open bottom end of the oil smoke pipeline. It should be noted that, after the control module receives the noise signal detected by the microphone, the control module performs corresponding analysis processing, and then the control module controls the speaker to emit a sound signal for canceling the noise signal. However, the control module requires a certain response time for the "analysis process", within which the noise signal has propagated for a certain distance; therefore, in order to ensure the noise reduction effect, the speaker should be spaced apart from the microphone by a certain distance. The microphone is arranged at the open top end of the oil smoke pipeline, and the loudspeaker is arranged at the open bottom end of the oil smoke pipeline, so that the distance between the loudspeaker and the microphone is ensured to the right maximum degree, and the noise reduction effect is improved.

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 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 modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are within the protection scope of the present application, unless departing from the content of the present application.

Claims (10)

1. The utility model provides a range hood, includes centrifugal fan (1), oil smoke pipeline (4) and collection petticoat pipe (5) that top-down set gradually, air current flows through in proper order when centrifugal fan (1) moves collection petticoat pipe (5), oil smoke pipeline (4) and centrifugal fan (1), its characterized in that:

an air inlet (2) of the centrifugal fan (1) is opened downwards to face the oil smoke pipeline (4);

the active noise reduction device comprises a microphone (6), a loudspeaker (7) and a control module;

the microphone (6) and the loudspeaker (7) are electrically connected to the control module;

the microphone (6) and the loudspeaker (7) are both arranged in the oil smoke pipeline (4) and are suitable for reducing noise generated by the centrifugal fan (1).

2. The range hood of claim 1, wherein:

the microphone (6) and the loudspeaker (7) are both arranged on the inner wall of the oil smoke pipeline (4).

3. The range hood of claim 2, wherein:

the outer wall of the air inlet (2) of the centrifugal fan (1) is attached to the inner wall of the oil smoke pipeline (4).

4. The range hood of claim 2, wherein:

the air inlet (2) of the centrifugal fan (1) and the oil smoke pipeline (4) are both cylindrical;

and an air inlet (2) of the centrifugal fan (1) is connected with the oil smoke pipeline (4).

5. The range hood of claim 2, wherein:

the number of the loudspeakers (7) is multiple, and the loudspeakers are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline (4);

the number of the microphones (6) is multiple, and the microphones are sequentially arranged along the circumferential direction of the inner wall of the oil smoke pipeline (4).

6. The range hood of claim 2, wherein:

the oil smoke pipeline (4) is in a cuboid shape;

the inner wall of the oil smoke pipeline (4) comprises a front wall, a right wall, a rear wall and a left wall which are sequentially connected;

the front wall, the right wall, the rear wall and the left wall are respectively provided with at least one microphone (6);

the front wall, the right wall, the rear wall and the left wall are respectively provided with at least one loudspeaker (7).

7. The range hood of claim 5, wherein:

in the extending direction of the oil smoke pipeline (4), the microphone (6) is arranged at least for two circles;

in the extending direction of the oil smoke pipeline (4), the loudspeaker (7) is arranged at least twice.

8. The range hood of any one of claims 1 to 7, wherein:

further comprising a casing for accommodating the centrifugal fan (1);

and a sound absorption material is filled between the shell and the centrifugal fan (1).

9. The range hood of any one of claims 1 to 7, wherein:

the oil smoke pipeline (4) extends along the vertical direction;

and an air outlet (3) of the centrifugal fan (1) is opened in the horizontal direction.

10. The range hood of any one of claims 1 to 7, wherein:

the microphone (6) is arranged at the open top end of the fume pipeline (4);

the loudspeaker (7) is arranged at the open position of the bottom end of the oil smoke pipeline (4).

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