CN216557270U - Noise reduction system and range hood with same - Google Patents
Noise reduction system and range hood with same Download PDFInfo
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- CN216557270U CN216557270U CN202122718935.1U CN202122718935U CN216557270U CN 216557270 U CN216557270 U CN 216557270U CN 202122718935 U CN202122718935 U CN 202122718935U CN 216557270 U CN216557270 U CN 216557270U
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Abstract
The utility model relates to a noise reduction system and a range hood applying the same. The noise reduction system controls the auxiliary loudspeaker to release an auxiliary noise reduction signal propagated outside the cavity according to the noise signal of the preset reference point outside the cavity collected by the first signal collection device and the noise signal of the other preset reference point outside the cavity collected by the second signal collection device under the condition that the main noise reduction signal eliminates the noise in the range hood cavity, and then the auxiliary noise reduction signal eliminates the noise outside the range hood cavity which is easily overlapped with the main noise of the range hood, so that the overlapping of the noise outside the range hood cavity is eliminated, the sound signal propagated to the ears of a user is effectively reduced, and the noise reduction effect is improved.
Description
Technical Field
The utility model relates to the field of range hoods, in particular to a noise reduction system and a range hood with the same.
Background
The range hood (or called range hood) has become the essential equipment in most family kitchens, and the range hood can discharge the oil smoke in the kitchen environment in time through the work of the range hood, so as to keep the kitchen environment and even the air in the whole indoor environment clean. The range hood can produce the noise at the during operation, influences user's use experience effect. In order to reduce the adverse effect of noise generated during the operation of the range hood on users, an active noise reduction method (or called active noise reduction method) is mainly adopted for noise reduction treatment at present, that is, an active noise reduction device is usually installed on the range hood.
The existing active noise reduction method mainly comprises the steps of additionally arranging a noise collector, a sound signal generator and a loudspeaker device for collecting motor noise (namely a main noise source) in a cavity of the range hood, wherein the noise collector collects the motor noise of the range hood as a reference noise source and sends the reference noise source to the sound signal generator, the sound signal generator generates a sound wave signal (which can be called as a noise cancellation signal) with the same amplitude and opposite phase with the motor noise of the range hood according to the motor noise collected by the noise collector, the loudspeaker device plays the noise cancellation signal when the range hood works, and the noise cancellation signal cancels the motor noise in the cavity of the range hood, so that the noise reduction effect is achieved.
However, in the actual active noise reduction process, because the cavity of the range hood is large and the cavity has an open opening, the noise cancellation signal emitted by the speaker of the active noise reduction device changes in the propagation process in the cavity, for example, the sound wave phase of the noise cancellation signal changes, and due to the superimposed influence of the noise signals outside the cavity, such as the noise signal generated by the main noise source, the sound wave signal reflected in the cavity, and the noise signal generated by the kitchen range, the noise cancellation signal finally propagated to the ears of the user is actually the superimposed signal of multiple sound wave signals, so that the active noise reduction effect is reduced.
SUMMERY OF THE UTILITY MODEL
The first technical problem to be solved by the present invention is to provide a noise reduction system in view of the above prior art.
The second technical problem to be solved by the utility model is to provide a range hood with the noise reduction system.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: a noise reduction system, comprising:
the main noise signal acquisition device is used for acquiring noise signals in a cavity of the range hood;
the controller is connected with the main noise signal acquisition device;
the main loudspeaker is connected with the controller and used for releasing a main noise-resisting signal into the cavity of the range hood according to an instruction of the controller;
it is characterized by also comprising:
the first signal acquisition device is connected with the controller and is used for acquiring a noise signal of a first preset reference point outside the cavity of the range hood;
the second signal acquisition device is connected with the controller and is used for acquiring a noise signal of a second preset reference point outside the cavity of the range hood; and the number of the first and second groups,
and the auxiliary loudspeaker is connected with the controller and used for being arranged outside the cavity of the range hood and releasing the auxiliary noise-counteracting signal transmitted outside the cavity according to the instruction of the controller.
The utility model discloses a noise reduction system in through increasing on the basis of current initiative noise reduction system and setting up first signal acquisition device, second signal acquisition device and at least one auxiliary loudspeaker, main speaker release is main to support under the noise signal condition, the noise signal condition control auxiliary loudspeaker release of the first predetermined reference point in the cavity outside of gathering by the controller according to first signal acquisition device and the noise signal condition control auxiliary loudspeaker release of the second predetermined reference point in the cavity outside of gathering by the second signal acquisition device is propagated in the cavity outside, reach under the condition of supporting noise signal elimination lampblack absorber cavity internal noise by main, again by supplementary noise signal elimination easy with lampblack absorber cavity external noise of lampblack absorber main noise superposition, the superposition of outside noise in the lampblack absorber cavity has been eliminated, the noise reduction effect has been improved.
In the noise reduction system, the first preset reference point is located near the ear of the user, and the second preset reference point is located on the cooking bench.
In the noise reduction system, the first signal acquisition device and the second signal acquisition device are both arranged outside the cavity of the range hood.
Further, in the noise reduction system, the second signal acquisition device is disposed on a cooking bench. Preferably, the second signal collection device is located at a middle position of two cooktops of the cooktop.
In the noise reduction system, at least one auxiliary loudspeaker is arranged at the same side of an air inlet plate of the range hood.
In order to accurately know the specific position of the user near the range hood, the noise reduction system of the present invention further comprises a user detection device for at least detecting the position of the user, wherein the user detection device is connected to the controller.
The technical scheme adopted by the utility model for solving the second technical problem is as follows: the range hood is characterized in that any one of the noise reduction systems is applied.
Compared with the prior art, the utility model has the advantages that: the noise reduction system in the utility model is additionally provided with a first signal acquisition device, a second signal acquisition device and at least one auxiliary loudspeaker on the basis of the existing active noise reduction system, under the condition that the main loudspeaker releases the main noise-resisting signal, the controller controls the auxiliary loudspeaker to release the auxiliary noise-resisting signal propagated outside the cavity according to the noise signal of the preset reference point outside the cavity collected by the first signal collection device and the noise signal of the other preset reference point outside the cavity collected by the second signal collection device, under the condition that the noise in the smoke ventilator cavity is eliminated by the main noise-resisting signal, the noise outside the smoke ventilator cavity which is easily overlapped with the main noise of the smoke ventilator is eliminated by the auxiliary noise-resisting signal, the overlapping of the noise outside the smoke ventilator cavity is eliminated, so that the sound signal propagated to the ears of a user is effectively reduced, and the noise reduction effect is improved.
Drawings
FIG. 1 is a schematic diagram of a noise reduction system in an embodiment of the utility model;
fig. 2 is a schematic view of the range hood according to the embodiment of the present invention when the air inlet plate is not opened;
fig. 3 is a schematic diagram of the range hood in fig. 2 after the right air inlet plate is opened.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
The embodiment provides a noise reduction system applied to a range hood, in particular to an improved active noise reduction system. Specifically, referring to fig. 1 and fig. 2, the noise reduction system of this embodiment includes a main noise signal collection device 11, a controller 12, a main speaker 13, a first signal collection device 14, a second signal collection device 15, two auxiliary speakers 16, and a user detection device 17 for detecting at least the position of a user, where the user detection device 17 is arranged at the front side of the upper box of the range hood, the user detection device 17 may be a graphic sensor, and the controller 12 is connected to the main noise signal collection device 11, the main speaker 13, the first signal collection device 14, the second signal collection device 15, the auxiliary speakers 16, and the user detection device 17, respectively. Wherein:
the main noise signal acquisition device 11 is arranged on a fluid path between a fan system and an air inlet of the range hood and is responsible for acquiring noise signals in the cavity 20 of the range hood 2; the cavity 20 is formed by an upper cavity formed by an upper box body 21 of the range hood 2 and a lower cavity formed by a lower box body 22;
the main loudspeaker 13 is arranged on an oil guide plate of a lower box body of the range hood and is responsible for releasing a main noise cancellation signal into a cavity 20 of the range hood 2 according to an instruction of the controller 12 so as to eliminate noise generated by a motor in the cavity;
the first signal acquisition device 14 is configured to be disposed at a position outside the cavity of the range hood and close to the ear of the user, and is responsible for acquiring a noise signal of a first preset reference point outside the cavity 20 of the range hood 2, where the first preset reference point is, for example, set at a position close to the ear of the user;
the second signal acquisition device 15 is configured to be disposed outside the cavity of the range hood and located at a middle position between two cookers on the cooking bench, and is responsible for acquiring a noise signal of a second preset reference point outside the cavity 20 of the range hood 2, for example, the second preset reference point is set as a middle position between two cookers on the cooking bench;
and the auxiliary loudspeaker 16 is arranged outside the cavity 20 of the range hood 2, and releases an auxiliary noise cancellation signal propagated outside the cavity according to an instruction of the controller, wherein the auxiliary noise cancellation signal cancels a noise signal at a second preset reference point. The first auxiliary loudspeaker of the two auxiliary loudspeakers is used for being arranged at the position, on the same side with one air inlet plate of the range hood, and the second auxiliary loudspeaker of the two auxiliary loudspeakers is used for being arranged at the position, on the same side with the other air inlet plate of the range hood. That is, for example, one side of the left air inlet plate 23 of the range hood corresponds to an auxiliary speaker, and one side of the right air inlet plate 24 of the range hood also corresponds to an auxiliary speaker.
After the noise reduction system of this embodiment is installed on the range hood and starts the noise reduction operation, after the right air inlet plate 24 of the range hood is opened, referring to fig. 3, a right air inlet 240 appears on the range hood, and under the condition that the main speaker 13 releases the main noise-counteracting signal, the controller 12 controls the auxiliary speaker on the same side as the opened air inlet plate of the range hood to release the auxiliary noise-counteracting signal according to the noise signal at the position close to the user ear outside the cavity collected by the first signal collection device 14 and the noise signal at the middle position of the two cookers outside the cavity collected by the second signal collection device 15, for example, once the noise signal collected by the first signal collection device 14 has reached the preset noise reduction effect through comparison, the controller makes the whole noise reduction system continue to reduce noise in the current state; otherwise, the controller causes the auxiliary speaker 16 to release the auxiliary noise cancellation effect until the noise signal collected by the first signal collection device 14 reaches the predetermined noise reduction effect position. So, just can be in the main condition of making an uproar signal elimination lampblack absorber cavity internal noise (mainly be motor noise) that supports, the signal of making an uproar removes the signal of making an uproar again by the supplementary of this auxiliary loudspeaker release and eliminates easy lampblack absorber cavity external noise (like the produced noise of cooking utensils) with lampblack absorber main noise stack to eliminate the stack of the inside and outside noise of lampblack absorber cavity, make the sound signal of spreading to user's ear department effectively fall the noise, improved the noise reduction effect.
The embodiment also provides a range hood, and the range hood is provided with the active noise reduction system.
Claims (8)
1. A noise reduction system, comprising:
the main noise signal acquisition device (11) is used for acquiring noise signals in a cavity (20) of the range hood (2);
the controller (12) is connected with the main noise signal acquisition device (11);
the main loudspeaker (13) is connected with the controller (12) and releases a main noise cancellation signal into the cavity (20) of the range hood (2) according to an instruction of the controller;
it is characterized by also comprising:
the first signal acquisition device (14) is connected with the controller (12) and is used for acquiring noise signals of a first preset reference point outside the cavity (20) of the range hood (2);
the second signal acquisition device (15) is connected with the controller (12) and is used for acquiring noise signals of a second preset reference point outside the cavity (20) of the range hood (2); and the number of the first and second groups,
and the auxiliary loudspeaker (16) is connected with the controller (12) and is arranged outside the cavity (20) of the range hood (2), and an auxiliary noise cancellation signal transmitted outside the cavity is released according to an instruction of the controller.
2. The noise reduction system of claim 1, wherein the first predetermined reference point is located proximate to an ear of the user and the second predetermined reference point is located on the cooktop.
3. The noise reduction system according to claim 1, wherein the first signal acquisition device (14) and the second signal acquisition device (15) are both disposed outside a cavity of the range hood.
4. The noise reduction system according to claim 3, characterized in that the second signal acquisition arrangement (15) is provided on a hob.
5. The noise reduction system according to claim 4, characterized in that the second signal acquisition device (15) is located in a middle position of two cooktops of a hob.
6. The noise reduction system according to any one of claims 1 to 5, wherein at least one auxiliary speaker (16) is disposed at the same side of an air inlet plate (21) of the range hood (2).
7. Noise reduction system according to any of claims 1 to 5, further comprising user detection means (17) for detecting at least where a user is located, the user detection means (17) being connected to the controller (12).
8. A range hood, characterized in that, has applied the noise reduction system of any claim 1 ~ 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122718935.1U CN216557270U (en) | 2021-11-08 | 2021-11-08 | Noise reduction system and range hood with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122718935.1U CN216557270U (en) | 2021-11-08 | 2021-11-08 | Noise reduction system and range hood with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216557270U true CN216557270U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122718935.1U Active CN216557270U (en) | 2021-11-08 | 2021-11-08 | Noise reduction system and range hood with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216557270U (en) |
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2021
- 2021-11-08 CN CN202122718935.1U patent/CN216557270U/en active Active
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