CN218510975U - Low-noise range hood - Google Patents

Abstract

The utility model relates to a low noise range hood, include: a smoke collecting hood; the fan system is arranged above the smoke collecting hood; the air duct is arranged between the fan system and the smoke collecting hood; the air duct is also provided with a microphone assembly for collecting noise signals and a loudspeaker assembly for emitting noise reduction sound waves at a position adjacent to the smoke collecting hood, and the control system generates noise reduction signals according to the received noise signals of the microphone assembly and transmits the noise reduction signals to the loudspeaker assembly to emit the noise reduction sound waves. The active noise reduction device composed of the microphone assembly and the loudspeaker assembly is adopted to actively reduce noise in an area adjacent to the fume collecting hood by combining the noise distribution characteristic of the range hood with the fan system arranged on the top and connected with the fume collecting hood through the air duct, so that the low-frequency noise at the bottom of the air duct is effectively reduced, the purpose of improving the sound quality of the range hood can be achieved on the whole, and the use experience of a user is improved.

Description

Low-noise range hood

Technical Field

The utility model relates to a range hood technical field especially relates to a low noise range hood.

Background

With the development of kitchen appliances and the improvement of quality of life, consumers have higher and higher requirements on the appearance and performance of products. The range hood is one of important electrical appliances in a kitchen, the fan part of the existing range hood is relatively large in size, occupies a large space in the kitchen, and is installed right above a gas stove, so that the problems of head collision, inconvenience in pot throwing and the like frequently occur to a user during cooking. In addition, the distance between the fan part of the range hood and the user is very close, the working noise of the range hood is higher, and negative effects are caused on the cooking environment and the life quality of the user.

For this reason, application No. CN201610703335.9 (grant No. CN 106091066B) discloses a range hood, comprising: a smoke collection cavity; the exhaust cavity is arranged above the smoke collecting cavity, communicated with the smoke collecting cavity and positioned in a space formed by the ceiling and the top wall in the room; and the fan part is arranged in the exhaust cavity. And the silencing cotton is arranged in the exhaust cavity and positioned outside the fan part so as to reduce the noise of the fan part. The exhaust cavity is arranged in a space formed by the suspended ceiling and the top wall, and the fan part is arranged in the exhaust cavity, so that the blocking effect of the suspended ceiling effectively reduces the indoor noise introduced by the fan part, the comfort of the range hood is improved, and the use experience of a user is improved.

Although the fan system of range hood in the above-mentioned patent is placed with in the furred ceiling, air intake and fan system separation have been kept away from the human ear position through very long wind channel, simultaneously because the syllable-dividing effect of furred ceiling, the noise has been reduced on the whole, range hood in the above-mentioned patent still has certain not enough, because the fan is placed at the furred ceiling, because reasons such as outward appearance, the wind channel between fan and the collection petticoat pipe is comparatively narrow, make the running state of fan relatively poor, low frequency noise is more outstanding, and these low frequency noise will above-mentioned wind channel spread to the air intake, above-mentioned fan system noise is through the furred ceiling sound insulation and keep away from the method of human ear position and reduced the noise, but the reduction mainly be high frequency noise, because low frequency noise have stronger penetrability and farther propagation distance, on the contrary because the reduction of high frequency noise, make low frequency noise more outstanding, sound quality and user's use experience have been influenced.

Therefore, the existing 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 effectively reduce the low frequency noise that transmits to collection petticoat pipe vicinity, improve the low noise range hood that the user used experience.

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

the smoke collecting hood is provided with a smoke inlet and a smoke outlet;

the fan system is arranged above the smoke collecting hood and is provided with an air inlet;

the air duct is arranged between the fan system and the smoke collecting hood and is provided with an air inlet end connected with a smoke outlet of the smoke collecting hood and an air outlet end connected with an air inlet of the fan system;

the wind channel is being close to still be provided with the microphone subassembly that is used for gathering the noise signal and the speaker subassembly that is used for sending and falls the sound wave of making an uproar in the position of collection petticoat pipe, microphone subassembly and speaker subassembly all are connected with range hood's control system electricity, and control system is according to the receipt the noise signal generation of microphone subassembly falls the signal of making an uproar to with this fall the signal transmission of making an uproar the speaker subassembly in order to send and fall the sound wave of making an uproar.

As an improvement, the loudspeaker assembly comprises at least two loudspeakers, and the at least two loudspeakers are respectively arranged on two opposite side walls of the air channel. Through the phase place that the control both sides speaker sent, the sound wave of making an uproar falls is launched out to the speaker of the wind channel left and right sides, can peak and peak stack, trough and trough stack to the mutual superimposed sound peak value that makes is higher, forms the sound wave that the energy is stronger, and then can offset with the low frequency sound wave in this region, effectively promotes the noise reduction effect.

Because the low-frequency noise that top fan system produced mostly passes through the regional transmission of wind channel bottom to the collection petticoat pipe in and pass through the flue gas entry and see out, in order to fall the noise that falls in this region preferentially, reduce the low-frequency noise and pass through the flue gas entry of collection petticoat pipe and go out, the sound production direction of the speaker that sets up on two relative lateral walls in wind channel all faces the inside in wind channel.

The loudspeaker can be arranged inside the air channel or outside the air channel, so that in order to avoid the situation that the flow area of the air channel is reduced due to the fact that the loudspeaker with the larger size is arranged in the air channel, air channel resistance is increased, and the performance of the fan is influenced, the loudspeaker is arranged outside two opposite side walls of the air channel, and sound transmission holes for sound to pass through are formed in the positions, corresponding to the loudspeaker, of the two opposite side walls of the air channel.

In order to ensure the integral aesthetic property of the noise reduction device and realize the sound insulation of the loudspeaker, the noise reduction device also comprises a cover shell which is connected to the side wall of the air duct and covers the loudspeaker.

In order to further improve the noise reduction effect on low-frequency noise, the air duct is vertically extended, the height of the air duct is marked as H, wherein H is larger than or equal to 700mm and is smaller than or equal to 950mm, the distance between two loudspeakers correspondingly arranged on two opposite side walls of the air duct is marked as L, and L is larger than or equal to 400mm and is smaller than or equal to 700mm.

In order to facilitate the installation and the disassembly of the noise reduction device, the air duct comprises an air duct body and an auxiliary air duct detachably connected to the air duct body, and the microphone assembly and the loudspeaker assembly are arranged on the auxiliary air duct.

The microphone assembly and the loudspeaker assembly are arranged on an independent auxiliary air duct to form an independent split structure, so that the microphone assembly and the loudspeaker assembly can be conveniently connected with the smoke collecting hood and the air duct main body, and the overhaul and the replacement of a noise reduction part are facilitated.

In order to be convenient to adapt to a cabinet of a kitchen and avoid excessive cabinet space occupation, the auxiliary air duct is of a flat structure with the left-right direction dimension larger than the front-back direction dimension, the auxiliary air duct comprises a first interface used for being connected with a smoke outlet of the smoke collecting hood and a second interface used for being connected with the air duct body, and the first interface and the second interface are arranged oppositely in the vertical direction.

In order to facilitate the installation of each part of the noise reduction device, the microphone device further comprises a fixing frame which is detachably connected in the auxiliary air duct and extends along the left-right direction, and the microphone assembly is arranged on the fixing frame.

In order to guarantee the accuracy of the microphone assembly for collecting the noise signals, the microphone assembly comprises at least two microphones which are sequentially arranged at intervals along the extending direction of the fixing frame.

In order to avoid the influence of the setting position of the loudspeaker on the sound collection of the microphone, the loudspeaker assembly and the microphone assembly need to be reasonably designed in the noise transmission direction, and preferably, the height of the loudspeaker assembly is lower than that of the microphone assembly.

Compared with the prior art, the utility model has the advantages that: the active noise reduction device composed of the microphone assembly and the loudspeaker assembly is adopted to actively reduce noise in the area adjacent to the fume collecting hood by combining the noise distribution characteristic of the range hood with the fan system arranged on the upper part and connected with the fume collecting hood through the air duct, and the noise reduction mode can effectively reduce low-frequency noise transmitted to the bottom of the air duct, so that the purpose of improving the sound quality of the range hood can be achieved on the whole, and the use experience of a user is improved. Because the utility model discloses a device of making an uproar falls in initiative sets up the position in neighbouring collection petticoat pipe, and this is the noise that produces by fan subassembly along the wind channel spread to the last position of collection petticoat pipe, and collection petticoat pipe self is not the noise source, so, set up the device of making an uproar falls in initiative at this position, can reach the best noise reduction effect objectively, in addition, the mounting height of collection petticoat pipe often also highly is close with operator's ear, therefore also the best noise reduction effect in the subjectivity.

Drawings

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

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic perspective view of an active noise reduction device according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of FIG. 3 with the front side wall omitted;

FIG. 5 is a schematic perspective view of one of the housings of FIG. 3 with the speaker in an exploded position;

fig. 6 is a perspective cross-sectional view of an active noise reduction device according to an embodiment of the present invention;

fig. 7 is a front view of the range hood according to the embodiment of the present invention.

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 oriented in different directions, the directional terms are used for descriptive purposes and are not intended to be limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity.

Referring to fig. 1 to 7, a low noise range hood includes a fan system 10, a smoke collecting hood 20, and an air duct 30. The fan system 10 is adapted to be disposed atop a galley installation space, such as may be disposed above a ceiling on top of a galley and hidden from view. As can be seen in fig. 1, the fan system 10 may employ a centrifugal fan that is horizontally disposed (i.e., the axis of the impeller extends vertically). The fan system 10 has an air inlet 11 and an air outlet 12, wherein the air inlet 11 is opened downward, and the air outlet 12 is opened toward the side.

A fume collecting hood 20 is provided adjacent the cooktop, the hood 20 having a fume inlet 21 and a fume outlet 22. Specifically, the smoke collection hood 20 may adopt various structures of the smoke collection hood in the related art, such as a thin type smoke collection hood 20 having a small depth (i.e., a small size in the front-rear direction) as shown in fig. 1. The fume collecting hood 20 is an inverted triangle structure with a wide upper part and a narrow lower part, wherein a fume inlet 21 is arranged on the front side of the fume collecting hood 20, and a fume outlet 22 is arranged on the top of the fume collecting hood. The rear side of the smoke collecting cover 20 may be attached to a wall.

Referring to fig. 1 and 2, the duct 30 extends generally vertically for connecting the fan system 10 and the smoke collecting hood 20. Specifically, the air duct 30 has an air inlet end 31 for communicating with the smoke outlet 22 of the smoke collecting hood 20 and an air outlet end 32 for communicating with the air inlet 11 of the fan system 10. The air duct 30 of the present embodiment is a flat structure with a dimension in the front-rear direction smaller than that in the left-right direction, and as shown in fig. 1, it is a long and narrow air duct structure with a large left-right distance and a small front-rear distance.

Referring to fig. 3 and 4, the air duct 30 is provided with an active noise reducer 40, an active noise reducer 40 microphone assembly 42 and a speaker assembly 43 adjacent to the smoke collection hood 20. The microphone assembly 42 is used to provide a noise signal in the region adjacent the collection hood 20 and the speaker assembly 43 is used to emit noise reducing sound waves that match the noise signal. The microphone assembly 42 and the speaker assembly 43 are electrically connected to a control system of the range hood, and the control system generates a noise reduction signal according to the received noise signal of the microphone assembly 42 and transmits the noise reduction signal to the speaker assembly 43 to emit noise reduction sound waves. The control process and the working principle of active noise reduction implemented by matching the microphone component 42 and the speaker component 43 are the prior art, and are not described herein.

As shown in fig. 1, the air duct 30 includes an air duct body 300 and an auxiliary air duct 301 detachably connected to the air duct body 300, wherein the cross section of the auxiliary air duct 301 is substantially identical to the cross section of the air duct body 300, and the auxiliary air duct 301 may be understood as a section of the bottom of the air duct 30. Specifically, the overall height of the air duct 30 is denoted as H, wherein H is greater than or equal to 700mm and less than or equal to 950mm, the distance between the two opposite left and right side walls of the air duct 30 is approximately 400 mm-700 mm, and the height of the auxiliary air duct 301 is denoted as H, wherein H is greater than or equal to 300mm and less than or equal to 400mm, as shown in FIG. 7.

The auxiliary duct 301 has a first interface 411 (i.e. the inlet end 31 of the duct 30) for connecting with the flue gas outlet 22 of the fume collecting hood 20, and a second interface 412 for connecting with the lower port of the duct body. The first interface 411 and the second interface 412 of the auxiliary air duct 301 are arranged oppositely in the vertical direction, so that the air intake resistance can be reduced as much as possible and the overall aesthetic property of the range hood can be ensured.

Referring to fig. 6, the auxiliary duct 301 has a first side wall 401 and a second side wall 402 that are arranged opposite in the left-right direction, and a front side wall 403 and a rear side wall 404 that are opposite in the front-rear direction. The fixing frame 44, the microphone assembly 42 and the speaker assembly 43 are disposed on the auxiliary air duct 301. The auxiliary duct 301 may be understood as a supporting box structure to which the holder 44, the microphone assembly 42 and the speaker assembly 43 can be mounted.

The fixing frame 44 is detachably coupled in the auxiliary duct 301 and extends in a transverse direction (in a left-right direction), and specifically, both left and right ends of the fixing frame 44 may be coupled to inner sides of the first and second sidewalls 401 and 402 of the auxiliary duct 301 by screws. The microphone assembly 42 includes at least two microphones 421 sequentially arranged at intervals along the extending direction of the fixing frame 44, and as shown in fig. 4, the 6 microphones 421 are uniformly arranged in the left-right direction.

The speaker assembly 43 of the present embodiment includes two speakers 431, and the two speakers 431 are symmetrically disposed on the first and second sidewalls 401 and 402 of the auxiliary duct 301. The distance between the two speakers 431 correspondingly disposed on the two opposite sidewalls of the auxiliary air duct 301 is denoted as L, wherein L is greater than or equal to 400mm and less than or equal to 700mm, corresponding to the left-right dimension of the auxiliary air duct 301, as shown in fig. 7.

The first side wall 401 and the second side wall 402 of the auxiliary air duct 301 have sound-transmitting holes 413 at positions corresponding to the speakers 431, and the sound-emitting direction of the speakers 431 is toward the sound-transmitting holes 413, that is, toward the inside of the auxiliary air duct 301. The sound wave of making an uproar that falls that the speaker 431 of the supplementary wind channel 301 left and right sides sent can realize crest and crest stack, and trough stack, the peak value of the sound wave of making an uproar that falls of mutual stack is higher, forms the sound wave that the energy is stronger, and then can offset with the low frequency noise in this region scope, effectively promotes the noise reduction effect. Therefore, the energy of the low-frequency sound wave can be improved on the basis of not increasing the size (the volume) of the loudspeaker, and the active noise reduction effect is improved. The speaker 431 is placed on the outer side of the air duct 30, so that the phenomenon that the air duct flow area is reduced due to the fact that the speaker 431 with the larger size is arranged in the air duct 30, air duct resistance is increased, and fan performance consideration is influenced can be avoided. On the other hand, the speaker 431 is only contacted with the fluid in the air duct 30 through the sound-transmitting hole 413, so that the adhesion of oil smoke on the speaker 431 is greatly reduced, and the influence of the reduction of the noise reduction effect caused by the weakening of the sound production capability of the speaker 431 due to the adhesion of the oil smoke is avoided as much as possible.

The auxiliary air duct 301 is further provided with two corresponding covers 45, and the two corresponding covers 45 are respectively connected to the first side wall 401 and the second side wall 402 of the auxiliary air duct 301 and correspondingly cover the left loudspeaker 431 and the right loudspeaker 431. The enclosure 45 is provided to protect the speaker assembly 43, and to provide sound insulation.

The range hood of this embodiment combines the fan system to put on the top and through the noise distribution characteristic that wind channel and collection petticoat pipe link to each other, has adopted the initiative that comprises microphone subassembly and speaker subassembly to fall the device of making an uproar and has initiatively fallen the noise in the region of neighbouring collection petticoat pipe, and this kind of mode of making an uproar of falling can effectively reduce the low frequency noise (generally mean the frequency is below 2000 hz) that produces in the wind channel to can reach the purpose of improving the sound quality of range hood on the whole, improve user's use experience. Because the utility model discloses a device of making an uproar falls in initiative sets up the position in neighbouring collection petticoat pipe, and this is the noise that produces by fan subassembly along the wind channel spread to the last position of collection petticoat pipe, and collection petticoat pipe self is not the noise source, so, set up the device of making an uproar falls in initiative at this position, can reach the best noise reduction effect objectively, in addition, the mounting height of collection petticoat pipe often also highly is close with operator's ear, therefore also the best noise reduction effect in the subjectivity.

Claims (11)

1. A low noise range hood, comprising:

a smoke collection hood (20) having a smoke inlet (21) and a smoke outlet (22);

the fan system (10) is arranged above the fume collecting hood (20) and is provided with an air inlet (11);

the air duct (30) is arranged between the fan system (10) and the smoke collecting hood (20) and is provided with an air inlet end (31) connected with a smoke outlet (22) of the smoke collecting hood (20) and an air outlet end (32) connected with an air inlet (11) of the fan system (10);

the method is characterized in that: the air duct (30) is further provided with a microphone assembly (42) for collecting noise signals and a loudspeaker assembly (43) for emitting noise reduction sound waves at a position adjacent to the smoke collecting hood (20), the microphone assembly (42) and the loudspeaker assembly (43) are both electrically connected with a control system of the range hood, and the control system generates the noise reduction signals according to the received noise signals of the microphone assembly (42) and transmits the noise reduction signals to the loudspeaker assembly (43) to emit the noise reduction sound waves.

2. The low noise range hood of claim 1, wherein: the loudspeaker assembly (43) comprises at least two loudspeakers (431), and the at least two loudspeakers (431) are respectively arranged on two opposite side walls of the air duct (30).

3. The low noise range hood of claim 2, wherein: the sound production directions of the speakers (431) arranged on the two opposite side walls of the air duct (30) face the inside of the air duct (30).

4. The low noise range hood of claim 3, wherein: the loudspeaker (431) is arranged outside two opposite side walls of the air duct (30), and sound-transmitting holes (413) for sound to pass through are formed in the two opposite side walls of the air duct (30) at positions corresponding to the loudspeaker (431).

5. The low noise range hood of claim 4, wherein: and the loudspeaker also comprises a cover shell (45) which is connected to the side wall of the air duct (30) and covers the loudspeaker (431).

6. The low noise range hood of claim 2, wherein: the air duct (30) is vertically extended and is provided with a height H, wherein the height H is more than or equal to 700mm and less than or equal to 950mm, the distance between two loudspeakers (431) correspondingly arranged on two opposite side walls of the air duct (30) is L, and the distance L is more than or equal to 400mm and less than or equal to 700mm.

7. The low-noise range hood according to any one of claims 1 to 6, wherein: the air duct (30) comprises an air duct body (300) and an auxiliary air duct (301) detachably connected to the air duct body (300), and the microphone assembly (42) and the speaker assembly (43) are arranged on the auxiliary air duct (301).

8. The low noise range hood of claim 7, wherein: the auxiliary air duct (301) is of a flat structure with the left-right direction dimension larger than the front-back direction dimension, the auxiliary air duct (301) comprises a first interface (411) used for being connected with the smoke outlet (22) of the smoke collecting hood (20) and a second interface (412) used for being connected with the air duct body (300), and the first interface (411) and the second interface (412) are arranged oppositely in the up-down direction.

9. The low noise range hood of claim 7, wherein: the microphone component is characterized by further comprising a fixing frame (44) which is detachably connected in the auxiliary air duct (301) and extends along the left-right direction, and the microphone component (42) is arranged on the fixing frame (44).

10. The low noise range hood of claim 9, wherein: the microphone assembly (42) comprises at least two microphones (421) which are sequentially arranged at intervals along the extension direction of the fixed frame (44).

11. The low noise range hood of claim 7, wherein: the speaker assembly (43) is located at a height lower than the microphone assembly (42).

Images