CN218328330U - Active noise reduction type range hood - Google Patents

Abstract

The utility model relates to a type of making an uproar range hood falls in initiative, include: a body; the active noise reduction device comprises a microphone component, a loudspeaker component and a controller; the microphone assembly at least comprises a first microphone and a second microphone, the first microphone is arranged in the smoke inlet channel, the second microphone is arranged outside the machine body, the controller receives a first noise signal from the first microphone and a second noise reduction signal from the second microphone, generates a corresponding noise reduction signal and transmits the noise reduction signal to the loudspeaker assembly to emit noise reduction sound waves. Because the microphones are arranged in the inner area and the outer area of the machine body, noise signals inside the smoke inlet air channel of the machine body and noise signals in the peripheral area of the machine body can be acquired, the loudspeaker assembly is controlled by the controller to send noise reduction sound waves matched with the loudspeaker assembly, the purpose of comprehensively reducing noise is achieved, the overall noise reduction effect in the operation process of the range hood is improved, and the use experience of a user is improved.

Description

Active noise reduction type range hood

Technical Field

The utility model relates to a range hood technical field especially relates to an actively fall type of making an uproar range hood.

Background

The range hood, as an important electrical appliance in a kitchen, generally utilizes a centrifugal fan to generate negative pressure, so as to exhaust oil smoke out of the room. Generally, a range hood generates noise during operation, and the noise is mainly generated by the following sources: the motor of the centrifugal fan works to drive the impeller to rotate, and the impeller cuts air in the rotating process, so that the air impacts on the inner wall of the volute and noise is generated. In the prior art, the technology of reducing the noise of the range hood is mostly passive modes, namely, a smoke inlet channel is optimized by adopting an aerodynamic method, or a low-noise motor is adopted, or a sound insulation or sound absorption material is used, and the modes are all that the machine body or the flue structure of the range hood is improved to absorb or obstruct partial energy of the noise, so that the purpose of reducing the noise is achieved. However, the above various noise reduction methods can only reduce high-frequency noise in the noise, and the suppression effect on middle-low frequency noise is not great, and the main component of the range hood noise is just low-frequency noise.

Active noise reduction is considered as a novel noise reduction technology and is also applied to a range hood for noise reduction. The active noise reduction device generally comprises a microphone and a loudspeaker, namely the microphone collects noise generated when the range hood works, the collected noise sound wave is transmitted to a controller in the form of an electric signal, the controller analyzes and processes the sound wave and sends an instruction to the loudspeaker to control the loudspeaker to emit the sound wave matched with the noise sound wave so as to neutralize the noise sound wave, and further the noise reduction effect is achieved.

However, the range hood with the active noise reduction device applied thereto still has certain disadvantages, and conventionally, when the active noise reduction device is designed, the existing design usually considers that the range hood is regarded as a pipeline, and a microphone assembly and a speaker assembly of the active noise reduction device are both placed inside the range hood so as to reduce noise propagated from an air inlet of the range hood. However, due to the sound transmission characteristic, the noise transmission of the range hood is not transmitted from the air inlet of the range hood singly, and the noise sources of other parts can also be transmitted to human ears. Because the inside noise of above-mentioned collection smoke chamber is mainly pneumatic noise, from the fan position downwardly propagation, the frequency range is partial to the wide band, also all has from the low frequency to medium-high frequency, if only gather the noise of collection smoke chamber inside, its noise reduction effect is limited, and the noise that transmits to culinary art personnel near the people's ear still exists on a large scale, has influenced whole sound quality and user's use and has experienced.

Therefore, the existing active noise reduction type range hood needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide one kind and can gather and fall the noise of making an uproar near the different regions of organism, promote the type of making an uproar range hood of falling of initiative of whole noise reduction effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an active noise reduction range hood, comprising:

the smoke inlet is used for allowing external smoke to enter the smoke inlet;

the active noise reduction device comprises a microphone assembly, a loudspeaker assembly and a controller;

the microphone subassembly includes first microphone and second microphone at least, first microphone is located advance in the cigarette passageway, be used for gathering advance the interior noise of cigarette passageway and generate first noise signal, the second microphone is located outside the organism, be used for gathering the peripheral region's of organism noise and generate the second noise signal, the controller receives first noise signal according to first microphone and receives the second from the second microphone and falls the signal of making an uproar and generate the signal of making an uproar that falls that corresponds, and then transmits to the speaker subassembly in order to send and fall the sound wave of making an uproar.

Generally, the speaker is required to face the active region of the cooking process of the user so as to ensure the noise reduction effect of the active region, and the speaker assembly is arranged on the outer side of the machine body.

The loudspeaker assembly is arranged outside the machine body, so that contact with oil smoke is reduced, and the problems of poor noise reduction effect and shortened service life caused by oil smoke pollution are avoided.

As an improvement, the speaker assembly is disposed at the front side of the body and includes at least two speakers, and the two speakers are sequentially arranged at intervals along the left-right direction of the body.

Since the smoke inlet of the cabinet is located at a height generally close to the height of the ears of the cooking person, the speaker assembly is disposed adjacent to the smoke inlet of the cabinet. The design enables the sound production range of the loudspeaker assembly to cover the positions of human ears of cooking personnel as much as possible, and the noise reduction effect of the region position is guaranteed.

The noise reduction device is sequentially arranged in the left and right directions, so that noise reduction sound waves can cover a wide area as far as possible at the front side of the machine body, and the noise reduction effect is ensured.

The smoke generally rises from bottom to top and enters the smoke inlet, in order to enable the loudspeaker assembly to be close to the height position of human ears as much as possible and avoid the loudspeaker assembly from being polluted by oil smoke, the smoke inlet is arranged on the front side of the machine body, the loudspeaker assembly is positioned above the smoke inlet, and the sound production direction is forward. The term "sound emission direction is toward the front" may mean that the sound emission direction (axial direction) of the speaker is substantially perpendicular to the wall surface of the wall, or may be disposed at an angle to the wall surface, as long as the sound emission range of the speaker can cover the ear position of the cooking person.

As an improvement, the height of the loudspeaker assembly from the ground is marked as H, wherein H is more than or equal to 1.4m and less than or equal to 1.7m.

The height setting of above-mentioned speaker subassembly for the height that the speaker was arranged is with culinary art personnel ear height difference is about the same, also can improve user's the experience of making an uproar of falling subjectively.

Because the noise in the organism advances the cigarette passageway and directly outwards propagates behind the flue gas entry, in order to avoid causing the noise signal of gathering (if receive the influence of the flue gas flow condition) can not accurately reflect the characteristic of the noise that spreads behind the flue gas entry because first microphone is far away from the flue gas entry, first microphone is in advance in the cigarette passageway be close to the flue gas entry sets up.

In order to ensure the overall noise reduction effect, under a general condition, noise signals collected by a first microphone and a second microphone are processed respectively through different loudspeaker assemblies to emit noise reduction sound waves, each loudspeaker assembly comprises a first loudspeaker assembly and a second loudspeaker assembly, the controller receives the first noise signals according to the first microphone, generates corresponding noise reduction signals, transmits the noise reduction signals to the first loudspeaker assembly to emit the noise reduction sound waves, and receives the second noise reduction signals according to the second microphone, generates corresponding noise reduction signals, and transmits the noise reduction sound waves to the second loudspeaker assembly to emit the noise reduction sound waves.

In order to ensure the accuracy of collecting the noise in the smoke inlet channel, the number of the first microphones is at least two, and the first microphones are sequentially arranged at intervals along the left and right directions of the smoke inlet channel.

In order to reduce as much as possible the transmission of noise generated by the fan system to the bottom, the fan system is usually designed separately from the housing, preferably in a high position, and for this purpose, the fan system is further included, the fan system is located above the housing and is in fluid communication with the smoke inlet channel of the housing, and the second microphone is located adjacent to the fan system. The second microphone is arranged in an area with larger outward radiation noise of the machine body, namely the area position adjacent to the fan system, so that the accuracy of collecting vibration noise of the machine body can be ensured.

Noise in the area adjacent to the fan system is mainly transmitted downward at the front side of the body, and for this reason, the second microphone is provided at the front side of the body.

In order to further ensure the accuracy of the collection of the noise signals of the second microphones, the number of the second microphones is at least two, and the second microphones are sequentially arranged at intervals along the left and right direction of the machine body.

In order to keep away from the setting of collection petticoat pipe as far as possible with fan system to noise abatement's downward transmission, fan system has the air intake, the organism is including collection petticoat pipe and wind guide channel, the top of collection petticoat pipe has the exhanst gas outlet, the wind guide channel is vertical to be extended, and has the air inlet port that is located the lower extreme and is located the air-out port of top, fan system's air intake with the air-out port of wind guide channel is connected, the exhanst gas outlet of collection petticoat pipe with the air inlet port of wind guide channel is connected, the second microphone is located the outside of wind guide channel.

Compared with the prior art, the utility model has the advantages that: because the microphones are arranged in the inner area and the outer area of the machine body, noise signals inside the smoke inlet air channel of the machine body and noise signals in the peripheral area of the machine body can be acquired, the loudspeaker assembly is controlled by the controller to send noise reduction sound waves matched with the loudspeaker assembly, the purpose of comprehensively reducing noise is achieved, the overall noise reduction effect in the operation process of the range hood is improved, and the use experience of a user is improved.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention;

fig. 2 is a left side view of an embodiment of the present invention;

fig. 3 isbase:Sub>A cross-sectional perspective view atbase:Sub>A-base:Sub>A in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Referring to fig. 1 to 3, an active noise reduction range hood includes a fan system 40, a body 10, and an active noise reduction device. The fan system 40 of the present embodiment is separated from the machine body 10, that is, the fan system 40 is located above the machine body 10. The body 10 has a smoke inlet passage 100 and a smoke inlet 111 for external smoke to enter into the smoke inlet passage 100. The smoke intake passage 100 of the housing 10 is in fluid communication with the blower system 40.

The machine body 10 includes a smoke collecting hood 11 and a guide duct 12. The fume collecting hood 11 has a vertically extending fume collecting chamber, and the fume inlet 111 is opened at the front side bottom of the fume collecting hood 11. Above the flue gas inlet 111 of the fume collecting hood 11 is a previously extended fume baffle 113. The top of the fume collecting hood 11 has a fume outlet 112. The guide duct 12 also extends vertically, and has an air inlet 121 at a lower end and an air outlet 122 at an upper end. The inner cavity of the guiding air duct 12 and the smoke collecting cavity of the smoke collecting cover 11 are communicated with each other, and together form a smoke inlet passage 100 of the machine body 10.

The fan system 40 of this embodiment is a horizontal fan, that is, the axis of the impeller of the fan system 40 extends substantially vertically, the bottom of the fan system 40 has an air inlet 41, and the side (specifically, the right side shown in fig. 1) has an air outlet 42 for discharging flue gas. An air inlet 41 of the fan system 40 is connected with an air outlet 122 of the guide air duct 12, and a smoke outlet 112 of the smoke collecting hood 11 is connected with an air inlet 121 of the guide air duct 12. The fan system 40 is located as far away from the fume collecting hood 11 as possible to reduce the transmission of noise to the floor (i.e., where the fume collecting hood 11 is located), such as the ceiling location of a kitchen where the fan system 40 may be located.

The active noise reduction device comprises a microphone assembly, a speaker assembly 30 and a controller, wherein the microphone assembly and the speaker assembly 30 are electrically connected with the controller. The controller can generate a noise reduction signal from the received noise signal of the microphone assembly and transmit the noise reduction signal to the speaker assembly 30 to emit noise reduction sound waves.

Specifically, the speaker assembly 30 of the present embodiment is provided on the outer side of the body 10, specifically, on the front side of the body 10. The speaker assembly 30 includes at least two speakers 31, and as shown in fig. 1, four speakers 31 are arranged at intervals in sequence in the left-right direction of the body 10. Specifically, the speaker assembly 30 is disposed adjacent to the smoke inlet 111 of the body 10 and above the smoke barrier 113. More specifically, the height of the speaker assembly 30 from the ground is denoted as H, wherein H is greater than or equal to 1.4m and less than or equal to 1.7m, as shown in FIG. 2. The speaker assembly 30 is disposed outside the body 10, reducing contact with oil smoke, and avoiding problems of poor noise reduction effect and shortened service life due to oil smoke pollution. In addition, since the height of the position of the smoke inlet 111 of the machine body 10 is generally close to the height of ears of a cooking person, the speaker assembly 30 needs to be arranged as close to the bottom of the machine body 10 as possible, and the sound production range of the speaker assembly 30 arranged adjacent to the smoke inlet 111 can cover the position of the ears of the cooking person as much as possible, so as to ensure the noise reduction effect of the position of the area. The noise reduction sound waves are arranged in sequence in the left-right direction, so that the noise reduction sound waves can cover the activity area of the cooking process of a user as wide as possible at the front side of the machine body 10, and the noise reduction effect of the whole area of the front side of the machine body 10 is ensured. Although the speaker is disposed adjacent to the smoke inlet 111, it is located above the smoke inlet 111, and particularly, due to the shielding of the smoke barrier 113, contact with the smoke can be effectively avoided.

The sound emission direction of the speaker 31 is forward, wherein the sound emission direction (axial direction) of the speaker may be substantially perpendicular to the wall surface, or may be arranged at a certain angle with respect to the wall surface, as long as the sound emission range of the speaker can cover the ear position of the cooking person.

The microphone assembly of the present embodiment includes at least a first microphone 21 and a second microphone 22. The first microphone 21 is disposed in the smoke inlet 100, and is configured to collect noise in the smoke inlet 100 and generate a first noise signal. The second microphone 22 is disposed outside the body 10, and is configured to collect noise in a peripheral area of the body 10 and generate a second noise signal.

The controller may receive the first noise signal from the first microphone 21 and the second noise reduction signal from the second microphone 22 and generate corresponding noise reduction signals for transmission to the speaker assembly 30 to emit noise reduced sound waves. Because the microphone has all been set up in organism 10 inside, outside region, therefore, can all gather the noise signal of the inside noise signal in the flue gas inlet duct of organism 10 and the noise signal of organism 10 peripheral region to send out the assorted sound wave of making an uproar that falls with it through controller control speaker subassembly 30, reach the purpose of making an uproar of falling comprehensively, promoted the whole noise reduction effect to range hood operation in-process, improved user's use experience.

Specifically, since the noise in the smoke inlet channel 100 of the machine body 10 directly propagates outward after passing through the smoke inlet 111, in order to avoid that the collected noise signal (e.g. affected by the flow condition of the smoke) cannot accurately reflect the characteristics of the noise propagated after passing through the smoke inlet 111 because the first microphone 21 is far away from the smoke inlet 111, the first microphone 21 is disposed in the smoke collecting cavity of the smoke collecting hood 11 and is disposed adjacent to the smoke inlet 111, specifically, is disposed at a position slightly above the smoke inlet 111. The first microphones 21 are at least two, and the first microphones 21 are sequentially arranged at intervals along the left and right directions of the smoke collection cavity, so that the accuracy of noise collection in the smoke collection cavity can be guaranteed.

The second microphone 22 is disposed outside the air guide duct 12, specifically, in front of the air guide duct 12, and is adjacent to the fan system 40. The second microphone 22 is disposed in a region where the body 10 radiates noise outwardly, that is, a region adjacent to the fan system 40, so that the accuracy of the vibration noise of the body 10 can be ensured. The second microphone 22 has at least two, and fig. 1 shows three second microphones 22, and the three second microphones 22 are sequentially arranged at intervals along the left-right direction of the body 10 to ensure the accuracy of noise signal collection of the second microphones 22.

In order to ensure the overall noise reduction effect, generally, according to the noise signals collected by the first microphone 21 and the second microphone 22, the noise reduction sound waves are respectively processed and emitted through different speaker assemblies, specifically, the speaker assemblies include a first speaker assembly 301 and a second speaker assembly 302, the controller receives the first noise signal according to the first microphone 21, generates a corresponding noise reduction signal, transmits the corresponding noise reduction signal to the first speaker assembly 301 to emit the noise reduction sound waves, and receives the second noise reduction signal according to the second microphone 22, generates a corresponding noise reduction signal, and transmits the corresponding noise reduction signal to the second speaker assembly 302 to emit the noise reduction sound waves. The first speaker assembly 301 may be a single speaker or a combination of two or more speakers, as may the second speaker assembly 302.

When the range hood is started to work, the fan system 40 operates to generate noise, a part of noise is transmitted to the smoke collecting hood 11 through the smoke inlet channel 100 and penetrates out through the smoke inlet 111, the other part of noise radiates outwards through the shell of the fan system 40, the first microphone 21 of the active noise reduction device can collect the noise in the smoke collecting hood 11, the second microphone 22 can collect the noise radiated outwards by the shell of the fan system 40, the collected noise signals are simultaneously input to the controller, the controller controls the plurality of speakers to reduce the noise according to the collected noise signals by outputting the noise reduction signals.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter, referred to as a first portion and a second portion) in a unified manner, i.e., a fluid (gas, liquid or a mixture thereof) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide member, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims (13)

1. An active noise reduction range hood, comprising:

the smoke-removing machine comprises a machine body (10) and a smoke-removing device, wherein the machine body is provided with a smoke-removing channel (100) and a smoke inlet (111) for external smoke to enter the smoke-removing channel (100);

an active noise reduction device comprising a microphone assembly, a speaker assembly (30), and a controller;

the method is characterized in that: the microphone assembly at least comprises a first microphone (21) and a second microphone (22), the first microphone (21) is arranged in the smoke inlet channel (100) and used for collecting noise in the smoke inlet channel (100) and generating a first noise signal, the second microphone (22) is arranged outside the machine body (10) and used for collecting noise in the peripheral area of the machine body (10) and generating a second noise signal, and the controller receives the first noise signal according to the first microphone (21) and receives the second noise signal from the second microphone (22) to generate a corresponding noise reduction signal which is further transmitted to the loudspeaker assembly (30) to emit noise reduction sound waves.

2. The active noise reduction range hood of claim 1, wherein: the loudspeaker assembly (30) is arranged on the outer side of the machine body (10).

3. The active noise reduction range hood according to claim 2, wherein: the loudspeaker assembly (30) is arranged on the front side of the machine body (10) and comprises at least two loudspeakers (31), and the two loudspeakers (31) are sequentially arranged at intervals along the left and right directions of the machine body (10).

4. The active noise reduction range hood according to claim 1, wherein: the speaker assembly (30) is disposed adjacent to a smoke inlet (111) of the body (10).

5. The active noise reduction range hood as defined in claim 4, wherein: flue gas entry (111) are located the front side of organism (10), speaker subassembly (30) are located the top of flue gas entry (111), and the vocal direction is forward.

6. The active noise reduction range hood according to claim 2, wherein: the height of the loudspeaker assembly (30) from the ground is recorded as H, wherein H is more than or equal to 1.4m and less than or equal to 1.7m.

7. The active noise reduction range hood according to claim 1, wherein: the loudspeaker assembly comprises a first loudspeaker assembly (301) and a second loudspeaker assembly (302), the controller receives a first noise signal according to a first microphone (21), generates a corresponding noise reduction signal, transmits the noise reduction signal to the first loudspeaker assembly (301) to emit noise reduction sound waves, and receives a second noise reduction signal according to a second microphone (22), generates a corresponding noise reduction signal, transmits the noise reduction signal to the second loudspeaker assembly (302) to emit noise reduction sound waves.

8. The active noise reduction range hood according to claim 1, wherein: the first microphone (21) is arranged adjacent to the smoke inlet (111) within the smoke intake channel (100).

9. The active noise reduction range hood according to claim 8, wherein: the number of the first microphones (21) is at least two, and the first microphones (21) are sequentially arranged at intervals along the left-right direction of the smoke inlet channel (100).

10. The active noise reduction range hood according to any one of claims 1 to 9, wherein: and the fan system (40), wherein the fan system (40) is positioned above the machine body (10) and is in fluid communication with the smoke inlet channel (100) of the machine body (10), and the second microphone (22) is arranged adjacent to the fan system (40).

11. The active noise reduction range hood as defined in claim 10, wherein: the second microphone (22) is arranged on the front side of the machine body (10).

12. The active noise reduction range hood as defined in claim 11, wherein: the number of the second microphones (22) is at least two, and the second microphones (22) are sequentially arranged at intervals along the left-right direction of the machine body (10).

13. The active noise reduction range hood as defined in claim 10, wherein: fan system (40) has air intake (41), organism (10) is including collection petticoat pipe (11) and wind guide channel (12), the top of collection petticoat pipe (11) has exhanst gas outlet (112), wind guide channel (12) vertical extension, and have air inlet port (121) that are located the lower extreme and air outlet port (122) that are located the top, air intake (41) of fan system (40) with air outlet port (122) of wind guide channel (12) are connected, smoke outlet (112) of collection petticoat pipe (11) with air inlet port (121) of wind guide channel (12) are connected, second microphone (22) are located the outside of wind guide channel (12).

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