KR102401119B1 - Range hood with improved air suction and noise reduction function - Google Patents

Abstract

In accordance with the present invention, provided is a range hood capable of improving air suction and noise reduction performance by increasing a suction rate through an air suction acceleration inducement pipe for inducing a suction speed of discharge gas introduced into a hood body to become fast, and also, by installing a noise reducer effectively reducing an overall noise in which air exhaust noise, motor operation noise of a blower, and other ambient noise are synthesized. The range hood of the present invention includes: a hood body having an open lower part; a duct connected to an upper part of the center of the hood body; a blower installed in the duct and having an inlet; an air suction acceleration inducement pipe installed to be connected with the inlet of the blower, and extended by a predetermined length from the inlet to have an air suction inducement inlet formed at an end with an open cross sectional area at least smaller than the open cross sectional area of the hood body; and a noise reducer installed in the hood body to reduce the noise produced while the blower is operating.

Description

Range hood with improved air suction and noise reduction function

The present invention relates to a range hood with improved intake and noise reduction performance, and more particularly, it rapidly sucks and discharges exhaust gases such as odors, water vapor, oil vapor and pollutants flowing into the hood body and discharges the exhaust gases. The present invention relates to a range hood having improved intake air and noise reduction performance by efficiently reducing noise generated when a blower is driven.

In general, a range hood for a kitchen is, as shown in FIG. It is installed on the upper part of the range (not shown) to induce and discharge exhaust gases such as odors, water vapor, oil vapor and pollutants generated during cooking. Hood body (1) with a large inlet area to facilitate the inflow of exhaust gases And, the duct 2 connected to the upper center of the hood body 1, and the exhaust pipe 4 installed in the duct 2 and connected to the outside to forcibly suck in odors, water vapor, oil vapor and pollutants to the outside Consists of a blower (3) for discharging to the furnace.

In such a range hood, recently, as shown in FIG. 2, a driving motor 3a having a bidirectional shaft is mounted on the blower 3, and rotary blades 3b and suction ports 3c are disposed on both sides of the range hood. It was intended to increase the suction efficiency.

However, the conventional range hood can improve the intake performance to some extent by increasing the amount of air intake by inhaling through the intake ports 3c on both sides when the blower 3 is inhaled, but as shown by the arrow in FIG. Since the air is directly sucked from the wide space within the hood body 1 through the suction port 3c, air cannot be rapidly sucked in, which has a limitation in improving the intake performance of the range hood.

In addition, when using the conventional range hood, the vibration noise generated by the motor driving of the blower 3 and the vibration of the blower 3 transmitted to the surrounding structures or the hood body 1 and the duct 2, as well as the noise, Noise is also generated in the process of exhausting air, and sensitive people have a problem in that it is difficult to concentrate on cooking while cooking. is requested as

The present invention is to solve the problems of the prior art as described above, and its object is to provide an intake acceleration guiding pipe capable of quickly inducing the suction speed of the exhaust gas in sucking and discharging the exhaust gas introduced into the hood body through a blower. Intake and noise reduction by having a noise reduction device that can effectively reduce the overall noise combined with air exhaust noise generated when using the range hood, blower motor driving noise, and other ambient noise. It is to provide a range hood that can improve performance.

Another object of the present invention is to make it easy to attach and detach the intake acceleration guiding tube to the blower, so it is convenient to install and use it in an existing blower installed in the range hood, and to separate it from the blower when necessary for convenient cleaning or troubleshooting. It is to provide a range hood that can do this.

Another object of the present invention is to provide a range hood capable of minimizing contamination or damage from contaminating dust, high heat, moisture, etc. generated when the range hood is used.

In order to achieve the above object, the present invention is a range hood comprising a hood body having an open lower portion, a duct communicating with the upper central portion of the hood body, and a blower installed in the duct and having a suction port, the inlet of the blower an intake acceleration guiding pipe installed to communicate with the intake duct, extending a predetermined length from the suction port, and having an intake guiding inlet having an open cross-sectional area at least smaller than the open cross-sectional area of the hood body at an end thereof; and a noise reduction device installed in the hood body to reduce noise generated when the blower is driven.

In addition, in the present invention, the inlet of the blower is provided on both sides of the body of the blower, the intake acceleration guide pipe is respectively installed at the suction port on both sides, and the sum of the open cross-sectional areas of the intake guide inlet provided in both intake acceleration guide pipes, respectively is characterized in that the range hood is formed to be at least smaller than the open cross-sectional area of the hood body.

In addition, in the present invention, the intake acceleration guiding pipe is detachably installed at the suction port of the blower, and the detachable structure of the intake acceleration guiding pipe attaches a ring-shaped fixing plate to the suction port edge of the blower with an adhesive or a fixing screw, and the A range hood is characterized in that a flange portion having a shape corresponding to the fixing plate is formed at a detachable portion of the intake acceleration guiding pipe, and the fixing plate and the flange portion are detachably fixed by a fixing means.

In addition, in the present invention, the noise reduction device includes: a sound wave input unit for inputting a sound wave of noise generated when the range hood is used; an offset sound wave output unit for outputting an offset sound wave for canceling the noise; and detecting the amplitude and frequency of the sound wave input from the sound wave input unit, generating an offset sound wave having an amplitude opposite to the detected amplitude and having the same frequency as the detected frequency frequency, and outputting it through the offset sound wave output unit It features a range hood that includes an active noise-canceling controller that controls

In addition, in the present invention, the sound wave input unit is composed of a microphone, and the offset sound wave output unit is characterized in a range hood composed of a speaker.

In addition, in the present invention, the offset sound wave output unit consists of a vibrating speaker, and the vibrating speaker is installed in a cylinder installed between both intake acceleration induction pipes under the blower, but the vibrator of the vibrating speaker is in contact with the inner wall of the cylinder. It has a characteristic in the range hood that the offset sound wave is output through the

Further, in the present invention, the installation configuration of the vibrating speaker is characterized by a range hood in which the vibrator of the vibrating speaker is fixed to the cylindrical body by means of fixing means.

In addition, in the present invention, in the installation configuration of the vibrating speaker, a through hole having a larger area than the vibrator of the vibrating speaker is formed in the cylindrical body, and a vibrating plate covering the through hole is fixed to the vibrator of the vibrating speaker as a fixing means. , is characterized in a range hood in which the diaphragm is fixed to the cylinder by means of a fixing means so that the diaphragm is exposed through a through hole.

In addition, in the present invention, a range hood in which the main body of the vibrating speaker is covered with a housing, the housing and the cylinder are fixed with a fixing means, and a soft buffer member surrounding the lateral direction of the vibrator is interposed between the housing and the cylinder. is characterized by

In addition, in the present invention, the range hood is characterized in that the main body of the vibrating speaker is covered with a housing, the housing is fixed with the diaphragm and fixing means, and a soft buffer member surrounding the lateral direction of the vibrator is interposed between the diaphragm and the housing. There is this.

In addition, in the present invention, the installation configuration of the vibrating speaker is to install a fixing plate spaced apart from the inner wall surface of the cylindrical body by a predetermined distance in the cylindrical body, and fix both ends of the fixing plate to both side walls of the cylindrical body with fixing means, and the fixing plate A through hole through which the vibrator of the vibrating speaker passes is formed, the vibrator of the vibrating speaker is brought into contact with the inner wall surface of the cylinder through the through hole of the fixing plate, and is fixed with a fixing means, and the main body of the vibrating speaker is covered with a housing to cover the vibrating speaker The range hood is characterized in that the fixing plate and the housing are fixed with a fixing means to block the space between the fixing plate and the range hood, and a soft buffer member surrounding the lateral circumference of the vibrator is interposed between the cylindrical body and the fixing plate.

In the present invention having the above characteristic configuration, as an intake acceleration guide pipe of a predetermined length is installed at the suction port of the blower, when the exhaust gas guided into the hood body is sucked into the suction port of the blower, the intake acceleration guide pipe is relatively narrowly opened After the exhaust gas is introduced through the intake air induction inlet having a cross-sectional area, it is guided along a passage of a predetermined length of the intake acceleration guide pipe, so that the flow of intake gas can be quickly guided to the intake port of the blower, thereby increasing the air intake. This has a remarkable effect of improving the intake performance of the range hood.

In addition, the present invention can be applied to the suction port of a conventional blower that is installed and used in a range hood as the intake acceleration guiding pipe is detachably configured at the inlet of the blower, so that the range of use can be widened, and the detachable configuration is very simplified It has a very convenient effect when cleaning or repairing malfunctions by separating the intake velocity guide pipe from the blower if necessary.

In addition, the present invention is a combination of the noise generated by air exhaust noise generated when the range hood is used, the noise generated by the blower motor driving, and the vibration generated by the blower motor driving being transmitted to the surrounding structures and ducts. By detecting a sound wave and outputting an offsetting sound wave opposite to the sound wave to cancel the sound wave, noise generated when the range hood is used can be effectively reduced, thereby improving the emotional quality.

In addition, the present invention uses a vibration speaker as an offset sound wave output unit of the noise reduction device to be installed inside a separately provided cylinder and output an offset sound wave through the cylinder body, thereby minimizing the exposure of the vibration speaker, which occurs when the range hood is used. There is a remarkable effect in preventing the vibrating speaker from being contaminated or damaged from polluting dust, oil vapor, water vapor, etc.

1 is a perspective view showing a conventional range hood.
Figure 2 is a cross-sectional view showing a conventional range hood.
3 is a perspective view showing a range hood according to the present invention.
4 is a cross-sectional view showing a range hood according to the present invention.
5 is a perspective view illustrating a separation state of a blower and an intake acceleration guide pipe in a range hood according to the present invention;
6 is a perspective view illustrating a coupling state between a blower and an intake acceleration guide tube in a range hood according to the present invention;
7 is an explanatory diagram illustrating an active noise cancellation (ANC) principle of the present invention.
8 (a) and (b) are cross-sectional views showing the installation structure of the vibrating speaker in the second to fifth embodiments of the present invention.
9 (a) and (b) are cross-sectional views showing another installation structure of the vibrating speaker in the second to fifth embodiments of the present invention.
10 is a cross-sectional view showing another installation structure of the vibrating speaker in the fourth and fifth embodiments of the present invention;
11 is a cross-sectional view of a range hood showing another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings.

3 and 4 are a perspective view and a cross-sectional view of a range hood according to the present invention. As shown, the range hood in this embodiment is installed on the upper part of the range (not shown), and odor, water vapor, and oil vapor generated during cooking and a hood body 11 with an open lower portion to induce exhaust gas such as pollutants, a duct 12 communicating with the upper center of the hood body 11, and a duct 12 installed in the duct 12 and connected to the outside It is connected to the exhaust pipe 14 and is provided with a blower 13 for forcibly sucking exhaust gas such as odor, water vapor, oil vapor, and pollutants and discharging it to the outside.

The blower 13 for sucking and discharging the exhaust gas has a drive motor 13a having a bidirectional shaft mounted therein, and both sides of the body of the blower 13 by arranging the rotary blade 13b and the suction port 13c on both sides. It is designed to suck the exhaust gas from the

In addition, the blower 13 is provided with an intake acceleration guide pipe 20 for quickly inducing the intake speed of the exhaust gas.

The intake acceleration guide pipe 20 is formed in a hollow cylindrical shape and is installed to communicate with both suction ports 13c of the blower 13, and extends a predetermined length from the suction port 13c to have an intake guide inlet 21 at the end. is formed At this time, it is preferable that the open cross-sectional area of both intake induction inlets 21 is at least smaller than the open cross-sectional area of the hood body 11 .

In this embodiment, both suction ports 13c of the blower 13 are arranged in the horizontal direction, and the intake guide inlets 21 of the intake acceleration guide tube 20 are arranged to face the open inlet of the hood body 11 . To this end, the intake acceleration guide pipe 20 is bent by approximately 90 degrees from the suction port 13c of the blower 13, but is not limited thereto, regardless of the direction of the suction port 13c of the blower 13, the intake guide inlet ( Designing the shape of the intake acceleration guide pipe 20 so that 21) faces the open inlet of the hood body 11 can improve the suction efficiency of the exhaust gas.

In addition, the intake acceleration guiding pipe 20 may be formed by being integrally connected with the suction port 13c of the blower 13, but the intake acceleration guiding pipe 20 can be detachably connected to the suction port 13c of the blower 13 Therefore, it is preferable to attach and remove the intake acceleration guiding tube 20 when necessary.

Although not shown, the attachment/detachment structure of the intake acceleration guide pipe 20 is not shown, but a screw hole is formed around the suction port 13c of the blower 13 and the connection portion of the intake acceleration guide tube 20 corresponding thereto, and a screw is fixed. Removable by means of fastening, or by forming a fitting structure consisting of a locking protrusion and a locking groove in the vicinity of the suction port 13c of the blower 13 and the corresponding connection portion of the intake acceleration guiding pipe 20 to be mutually detachably fixed can do.

However, when the detachable structure using a set screw is applied to the blower 13 already installed in the range hood, it is necessary to form a screw hole in the blower 13, so that the blower 13 is damaged and the screw hole in a narrow space. The inconvenience of forming and fastening the set screw must be taken into account.

In addition, since a fitting structure using a fitting structure such as a hook protrusion and a locking groove must be formed around the suction port 13c of the blower 13 when the blower 13 is manufactured, the blower 13 installed in the new range hood ), it should be taken into account that it is not applicable to the blower 13 of the range hood that is already in use.

Therefore, in the present embodiment, in the detachable structure of the intake acceleration guide pipe 20, there is no need to newly manufacture the blower 13, and although the configuration is simple, it can be installed in the blower 13 already installed in the range hood, In addition, it provides a configuration that is easy to attach and detach even in a narrow space.

That is, as shown in Figs. 5 and 6, a ring-shaped fixing plate 31 of a size surrounding the suction port 13c of the blower 13 is provided and the suction port 13c of the blower 13 is around the edge portion ( 13d) by attaching the ring-shaped fixing plate 31 with an adhesive or a fixing screw, and forming a ring-shaped flange portion 32 of a size corresponding to the ring-shaped fixing plate 31 at the connection portion of the intake acceleration guide tube 20, By removably fixing the fixing plate 31 and the flange portion 32 with a fixing means, the intake acceleration guiding tube 20 can be detachably attached without damaging the existing blower 13 .

At this time, as the fixing means, a screw hole is formed in the fixing plate 31 and the flange part 32 and detachably fastened with a fixing screw, or a structure that can be mutually fitted to the fixing plate 31 and the flange part 32 is formed. However, in this embodiment, by using the clip member 33, it was possible to facilitate the detachment operation even in a narrow space.

That is, the clip member 33 is integrally formed with the fitting portion 33a and the tip fixing portion 33b, and the fitting portion 33a of the clip member 33 is formed on the peripheral edge of the ring-shaped fixing plate 31 . A plurality of locking parts 310 for fixing are formed and arranged at predetermined intervals, and a clip member ( 33) and a plurality of fixing grooves 320 that are detachably fixed to the tip fixing portion 33b are formed and disposed at predetermined intervals.

The locking part 310 of the fixing plate 31 includes a fitting groove 311 into which the fitting part 33a of the clip member 33 can be inserted from the lateral direction, and both sides of the inlet of the fitting groove 311. When the clip member 33 is inserted into the fitting groove 311 from the side with the formed locking protrusion 312, the gap between the both locking protrusions 312 is elastically widened and then closed while the clip member 33 of the clip member 33 is inserted. The fitting part 33a is fixed.

In addition, the fixing groove 320 of the flange part 32 is formed to have a narrower width than the long width of the tip fixing part 33b so that the tip fixing part 33b of the clip member 33 does not come off after inserting the clip member ( 33) is configured such that the tip fixing portion 33b is elastically caught in the fixing groove 320 while 'clicking'.

According to this configuration, as shown in FIG. 4 , when the driving motor 13a of the blower 13 is operated when the range hood is used, the rotary blade 13b fixed to the bidirectional shaft rotates through both suction ports 13c. The exhaust gas is sucked in and discharged to the outside through the exhaust pipe 14 connected to the outside.

At this time, the present invention is an intake acceleration guiding pipe ( 20) is installed, the exhaust gas flows in through the intake air induction inlet 21 and is accelerated in the process of flowing toward the intake 13c along the narrow passage of the intake acceleration guide tube 20, so as in FIG. The exhaust gas can be sucked stronger and faster than when directly sucked through the suction port 3c of the blower 3 in the wide open space of the body 1, thereby further improving the intake performance of the range hood.

In addition, as in the present invention, as shown in FIGS. 5 and 6 , the intake acceleration guiding tube 20 is detachable from the suction port 13c of the blower 13, so it can be detached and cleaned or repaired when necessary.

At this time, in the detachable structure of this embodiment, the fixing plate 31 is attached around the suction port 13c of the blower 13 with an adhesive or a fixing screw, and the flange portion 32 of the fixing plate 31 and the intake acceleration guide pipe 20 is a clip member. Since the attachment and detachment is performed by (33), the intake acceleration guide tube 20 can be attached and detached without damaging the blower 13, and the intake acceleration guide tube 20 is installed in a narrow space with the blower 13 installed in the range hood. (20) can be conveniently attached and detached, and it is possible to install the intake acceleration guiding tube (20) on the blower (13) that is already installed and in use in the range hood, thereby further expanding the range of use.

Meanwhile, as shown in FIG. 4 , the range hood of the present invention includes a noise reduction device for reducing noise generated during use of the range hood, such as noise generated by the motor driving of the blower 13 and air exhaust noise.

The noise reduction device includes a sound wave input unit 120 for inputting a sound wave of noise generated when the range hood is used, an offset sound wave output unit 130 for outputting an offset sound wave for canceling the noise, and the sound wave input unit 120 ) detects the amplitude and frequency of the input sound wave, and generates an offset sound wave having an amplitude opposite to the amplitude of the detected sound wave and having the same frequency as the detected sound wave frequency, and the offset sound wave output unit It is made to include an active noise canceling controller 140 that controls to output through 130 .

In this embodiment, it is exemplified that the noise reduction device is installed in the tubular body 150 installed between both intake acceleration guiding pipes under the blower.

Specifically, the sound wave input unit 120 is composed of a microphone and is installed inside the intake air induction inlet 21 of the intake acceleration guide tube 20, and the offset sound wave output unit 130 is composed of a speaker and is in the cylinder 150. install

At this time, in this embodiment, the microphone, which is the sound wave input unit 120, is illustrated as being installed on only one side of both intake acceleration guide tubes 20, but may be installed on both intake acceleration guide tubes 20, and the location is also the intake intake guide inlet. (21) It may be installed on the inner or outer side or the left and right inner wall surfaces of the intake acceleration induction pipe 20. In addition, the closer to the object that is the main cause of noise, for example, the blower 13, the better.

Also, as another embodiment, in the case of a speaker that is the offset sound wave output unit 130, it may be installed on the hood body 11 as shown in FIG. 11, and in the drawing, the speaker is installed on only one side of the hood body 11, However, it may be installed on both sides of the hood body 11, and in addition, it is preferable that the noise is discharged from the range hood to the outside or just before the position, thereby maximizing the reduction effect by canceling the noise most effectively.

According to this configuration, when the blower 13 is driven to discharge odors when the range hood is used as shown in FIG. 4 , odors, water vapor, oil vapor, and harmful substances are induced into the hood body 11 together with air, and then The rigid body is sucked in by the blower 13 and discharged to the outside through the exhaust pipe 14 .

In this process, noise is generated due to the self-vibration caused by the motor driving of the blower 13, and the vibration of the blower 13 is transmitted to the structure for installing the blower 13, the hood body 11, and the duct 12. It causes other noises, and also causes noise in the process of forcibly sucking in and exhausting air.

The noise generated in this way is input to the microphone which is the sound wave input unit 120 of the noise reduction device as shown in FIG. 4 , and the microphone transmits the sound waves of the noise to the active noise canceling controller 140 .

The active noise canceling controller 140 detects the amplitude and frequency of the sound wave input from the sound wave input unit 120 , and cancels the amplitude having an amplitude opposite to the amplitude of the detected sound wave and the same frequency as the frequency of the detected sound wave. A sound wave is generated and transmitted to the speaker which is the offset sound wave output unit 130 .

As a result, when an offset sound wave is output from the offset sound wave output unit 130, like the active noise canceling (ANC) principle shown in FIG. 7 , the sound wave of the noise generated when the range hood is used and the offset sound wave output unit 130 are output It is possible to reduce the noise by canceling the noise by the phenomenon of interfering with each other.

As described above, according to the present invention, the air exhaust noise generated when using the range hood, the vibration of the blower 13 and the vibration of the blower 13 are transmitted to the duct 12 and the hood body 11 by the active noise canceling (ANC) principle. It is possible to efficiently reduce noise generated as a whole, such as noise generated by the noise, and also because the offset sound wave output unit 130 of the noise reduction device is installed in the tubular body 150, it is introduced into the hood body 11 and discharged. It is possible to minimize contamination by adsorption of dust contained in air or damage by high heat and moisture.

8 (a) and (b) show an example in which the sound canceling output unit 130 of the noise reduction device described above is configured as a vibrating speaker 132 and installed in the cylindrical body 150 .

As shown in (a) of FIG. 8 , the vibrator 132a of the vibrating speaker 132 is directly attached to the cylindrical body 150 with the fixing screws 133a, which are fixing means, respectively, or adhesives or both sides instead of the fixing screws 133a. It can be directly attached with a tape and brought into contact, whereby the cylinder 150 can be used as a diaphragm to output an offset sound wave.

In addition, as shown in FIG. 8 (b), a through hole 115 having a larger area than the vibrator 132a of the vibrating speaker 132 is formed in the duct 12, the hood body 11 or the cylindrical body 150. And, to the vibrator 132a of the vibrating speaker 132, the diaphragm 134 covering the through hole 115 is fixed with a fixing screw 133a as a fixing means or an adhesive so that the diaphragm 134 forms the through hole 115. It can be configured by fixing the diaphragm 134 to the cylinder 150 to be exposed through the fixing screw 133b as a fixing means or an adhesive.

This is to improve the output performance of the offset sound wave of the vibrating speaker 132 by configuring the material of the diaphragm 134 with a material that transmits vibration well when the cylinder 150 is made of a material that does not transmit vibration well. .

9 (a) and (b) show another installation configuration of the vibrating speaker 132. As shown in FIG.

The installation configuration of FIG. 9 (a) is, in the installation configuration shown in FIG. 8 (a), the main body 132b of the vibrating speaker 132 is covered with the housing 136 to cover the housing 136 with the cylindrical body 150 ) fixed with a fixing screw 133b or an adhesive, which is a fixing means, and a soft buffer member 137 surrounding the lateral circumference of the vibrator 132a is interposed between the housing 136 and the cylindrical body 150. .

According to the installation configuration of this vibrating speaker 132, it is interposed between the housing 136 and the cylindrical body 150 and is installed in the configuration of FIG. 8 (a) by the buffer member 137 surrounding the vibrator 132a. In comparison, a predetermined distance is maintained between the housing 136 and the cylindrical body 150 , and the impact caused by the vibration of the cylindrical body 150 can be alleviated to increase the offset sound wave output efficiency.

The installation configuration of FIG. 9(b) is, in the installation configuration shown in FIG. 8(b), the main body 132b of the vibrating speaker 132 is covered with the housing 136, the housing 136 and the diaphragm ( 134) is fixed with a fixing screw 133b or an adhesive, which is a fixing means, and a soft buffer member 137 surrounding the lateral circumference of the vibrator 132a is interposed between the housing 136 and the vibrating plate 134. am.

Even with this installation configuration of the vibrating speaker 132, the installation configuration shown in (b) of FIG. In comparison, a predetermined distance is maintained between the housing 136 and the diaphragm 134 , and the shock caused by the vibration of the diaphragm 134 can be alleviated to increase the offset sound wave output efficiency.

10 shows another installation configuration of the vibrating speaker 32, spaced apart from the inner wall surface of the cylinder 50 within the cylinder 150 by a predetermined distance, and both ends of the fixing plate 151 are attached to the side walls of the cylinder 150. It is fixed with a fixing screw 133c or an adhesive, which is a fixing means, and a through hole 152 through which the vibrator 132a of the vibrating speaker 132 passes is formed in the fixing plate 151 to form the vibrator 132a of the vibrating speaker 132. ) in contact with the inner wall surface of the cylindrical body 150 through the through hole 152 of the fixing plate 151 and fixed with a fixing screw 133a or an adhesive as a fixing means.

In addition, the main body 132b of the vibrating speaker 132a is covered with the housing 136 to block between the vibrating speaker 132 and the fixing plate 151 with a fixing screw 133b or an adhesive, which is a fixing means, and the fixing plate 151 and The housing 136 is fixed, and the soft buffer member 153 surrounding the lateral circumference of the vibrator 132a is interposed between the fixing plate 151 and the cylindrical body 150 .

Even by the installation configuration of the vibrating speaker 132, a predetermined distance is maintained between the housing 136 and the cylinder 150, and the shock caused by the vibration of the cylinder 150 can be alleviated to increase the offset sound wave output efficiency. .

The embodiments described so far are merely illustrative of preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and within the spirit and claims of the present invention, those skilled in the art can Various changes, modifications or substitutions will be possible by this, and it should be understood that such embodiments fall within the scope of the present invention.

11: hood body 12: duct
13: blower 13c: intake port
13d: edge portion 20: intake acceleration guide tube
21: intake induction inlet 31: fixed plate
32: flange part 33: clip member
33a: fitting part 33b: tip fixing part
115, 152: through hole 120: sound wave input unit
130: offset sound wave output unit 132: vibration speaker
132a: vibrator 132b: body
134: diaphragm 136: housing
137,153: buffer member 140: active noise canceling controller
150: cylinder 151: fixing plate
310: locking part 311: fitting groove
312: locking projection 320: fixing groove

Claims (11)

In the range hood comprising a hood body having an open lower portion, a duct communicating with the upper central portion of the hood body, and a blower installed in the duct and having a suction port,
an intake acceleration guiding pipe installed to communicate with the suction port of the blower and extending a predetermined length from the suction port to form an intake induction inlet having an open cross-sectional area at least smaller than the open cross-sectional area of the hood body at an end thereof; and
and a noise reduction device installed in the hood body to reduce noise generated when the blower is driven,
The intake acceleration guiding pipe is detachably installed at the inlet of the blower,
In the detachable structure of the intake acceleration guide pipe, a ring-shaped fixing plate is attached to the edge of the intake port of the blower with an adhesive or a fixing screw, and a flange portion having a shape corresponding to the fixing plate is formed in the detachable portion of the intake acceleration guide tube, so that the fixing plate A range hood, characterized in that it is formed by detachably fixing the flange and the fixing means. The sum of the open cross-sectional areas of the intake ports of the blower are provided on both sides of the body of the blower, the intake acceleration guiding pipes are respectively installed on both suction ports, is at least smaller than the open cross-sectional area of the hood body. delete According to claim 1, wherein the noise reduction device,
a sound wave input unit for inputting sound waves of noise generated when the range hood is used;
an offset sound wave output unit for outputting an offset sound wave for canceling the noise; and
to detect the amplitude and frequency of the sound wave input from the sound wave input unit, generate an offset sound wave having an amplitude opposite to the detected amplitude and have the same frequency as the detected frequency frequency, and output it through the offset sound wave output unit Range hood comprising an active noise canceling controller to control. The range hood according to claim 4, wherein the sound wave input unit comprises a microphone, and the offset sound wave output unit comprises a speaker. [Claim 5] The cylinder according to claim 4, wherein the offset sound wave output unit consists of a vibration speaker, and the vibration speaker is installed in a cylinder installed between both intake and acceleration induction pipes under the blower, and the vibrator of the vibration speaker is in contact with the inner wall surface of the cylinder. Range hood, characterized in that the offset sound wave is output through the. The range hood according to claim 6, wherein the vibrating speaker is installed by fixing the vibrator of the vibrating speaker to the cylindrical body by means of fixing means. The method of claim 6, wherein the installation configuration of the vibrating speaker,
A through hole having a larger area than that of the vibrator of the vibrating speaker is formed in the cylinder body, and a vibrating plate covering the through hole is fixed to the vibrator of the vibrating speaker by a fixing means, and the vibrating plate is fixed to the cylinder body so that the vibrating plate is exposed through the through hole A range hood, characterized in that it is fixed by means. 8. The method of claim 7, wherein the main body of the vibrating speaker is covered with a housing, the housing and the cylinder are fixed by a fixing means, and a soft buffer member surrounding the lateral circumference of the vibrator is interposed between the housing and the cylinder. range hood with 9. The method of claim 8, wherein the main body of the vibrating speaker is covered with a housing, the housing is fixed to the diaphragm and fixing means, and a soft cushioning member surrounding the lateral direction of the vibrator is interposed between the diaphragm and the housing. range hood. The method of claim 6, wherein the installation configuration of the vibrating speaker,
In the cylinder, a fixing plate is installed to be spaced apart from the inner wall surface of the cylinder by a predetermined distance, and both ends of the fixing plate are fixed to both side walls of the cylinder by fixing means, and a through hole through which the vibrator of the vibrating speaker passes is formed in the fixing plate to form a vibration The vibrator of the speaker is brought into contact with the inner wall surface of the cylinder through the through hole of the fixing plate and fixed by a fixing means, and the main body of the vibration speaker is covered with the housing to block the between the vibration speaker and the fixing plate by fixing means as a fixing plate and the housing A range hood, characterized in that a soft cushioning member surrounding the lateral circumference of the vibrator is interposed between the cylindrical body and the fixing plate.

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