JP2014088986A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood capable of suppressing deterioration of a silencing effect by having a configuration in which maintenance is easy, and capable of suppressing deterioration of a silencing effect caused by an air flow even when an active silencing device is installed in a range hood including lamp black generating during cooking.SOLUTION: In a configuration, a light source 13 is accommodated in light source accommodation space 14 at a lower surface of a hood. Heating means is configured by including a microphone communication passage 16 and a speaker communication passage 18 with the light source accommodation space 14 having a communication port in the vicinity of a microphone 9 and a speaker 10.

Description

  The present invention relates to a range hood provided with an active silencer that is attached to an air passage of the range hood and silences noise generated during operation of the range hood.

  In recent years, range hoods installed in kitchens are required to reduce noise generated during operation. As one means for solving such a problem, there is a method of mounting an active silencer in a range hood.

  2. Description of the Related Art Conventionally, an active silencer for an air passage is known in which a sound-permeable plate member is installed between a speaker or a microphone and the air passage (see, for example, Patent Document 1).

  The active silencer will be described below with reference to FIG.

  As shown in FIG. 6, a speaker box 202 is placed on a top surface of a duct 201 via a plate material 203 and is fixed to a screw 204. The speaker box 202 includes a speaker 205 on the inner side and holds a microphone 206 on the outer side. The speaker 205 and the microphone 206 are in communication with the duct 201 via the plate material 203.

  The board material is a material with excellent sound permeability, heat insulation, and air tightness, such as open-cell soft urethane foam having these three properties, or a film having sound and air tightness effects and sound permeability, heat insulation. It is made of a material made by overlaying effective glass wool or felt. The speaker 205 and the microphone 206 are electrically connected to a signal processing control unit (not shown).

  When noise from the upstream side of the duct (left side in FIG. 6) propagates, it is detected by the microphone 206 via the plate material 203, converted into an electrical signal, and subjected to predetermined signal processing by the signal processing control unit, to the speaker 205. Supplied and converted to muffled sound waves. The muffled sound wave is emitted into the duct 201 through the plate material 203, and acts to interfere with noise and mute.

  Since the speaker 205 and the microphone 206 are installed facing the duct 201 that is the ventilation path, a high silencing effect can be expected with respect to the noise that propagates through the duct 201 that is the ventilation path, and the plate 203 is interposed. In addition, the microphone 206 and the speaker 205 can be protected from heat, dust, moisture, and the like inside the duct 201, and it can be expected to suppress deterioration of the silencing effect.

Japanese Patent Laid-Open No. 7-72873

  However, in the active silencer described in Patent Document 1, when an air flow containing oil smoke passes through the duct 201 like a range hood, a highly viscous oil component is necessary to ensure the sound permeability of the plate member 203. Since the fine gaps (for example, between the continuous foamed portion of the flexible urethane foam and the fiber of glass wool) enter the plate material 203, the sound permeability of the plate material 203 is impaired at the time of long-term use, and there is a problem that the silencing effect is reduced.

  Also, the oil that has entered the fine gaps in the plate material 203 cannot be removed by simple maintenance work such as wiping with the plate material 203 attached to the duct 201, or even if the plate material 203 is removed and wiped off. It is difficult to recover the sound transmission property because it is pushed into the plate material 203. In order to suppress the reduction in the silencing effect of the active silencer, the plate material 203 is removed and washed, or the plate material 203 is replaced. There is a problem of requiring complicated maintenance work.

  Therefore, the present invention solves the above-described problem, and includes an active silencer having a high silencing effect on a ventilation path through which oil and smoke passes, reducing maintenance work around the microphone and the speaker, and active silencer It aims at providing the range hood which can suppress the fall of the silencing effect of.

  And in order to achieve the above-mentioned object, the present invention is installed above the heating cooker, and has a discharge port that communicates with the outdoors, and a hood that has a suction port that sucks in air containing oil smoke generated during cooking, In a range hood provided with an active silencer composed of a ventilation fan, a motor, a microphone and a speaker for exhausting the air in the air passage connecting the discharge port and the suction port to the outside in the hood, the microphone and the speaker It is provided with a heating means for warming at least one of the surrounding wall surfaces, thereby achieving the intended purpose.

  According to the present invention, even if an active silencer is installed in a range hood containing high-temperature and high-humidity smoke generated during cooking, the reduction in the silencing effect is suppressed by adopting a configuration that reduces the maintenance work of the microphone and the speaker. And the fall of the silencing effect by an air current can also be controlled.

The block diagram which shows the side cross section of the range hood of Embodiment 1 of this invention Side sectional view of the vicinity of the communication path of the same range hood The block diagram which shows the side cross section of the range hood of Embodiment 2 of this invention Side sectional view of the vicinity of the communication path of the same range hood The block diagram which shows the side cross section of the range hood of Embodiment 3 of this invention Sectional drawing which shows the conventional active silencer

  The cooker hood according to claim 1 of the present invention is a hood that is installed above a cooking device and has a discharge port that communicates with the outdoors, and a suction port that sucks in air containing oil smoke generated during cooking, and the hood In a range hood provided with an active silencer composed of a ventilation fan, a motor, and a microphone and a speaker for exhausting the air in the air passage connecting the discharge port and the suction port to the outside, the microphone and the speaker A heating means for heating at least one peripheral wall surface is provided.

  In this way, by raising the temperature near the microphone or speaker, the dripping of oil attached as oil smoke around the microphone or speaker is promoted, the amount of oil solidifying is reduced, or solidification itself is suppressed. Thus, it is possible to reduce the maintenance work and suppress the decrease in the silencing effect of the active silencer.

  In addition, an illuminating unit for illuminating the cooking device is provided on the lower surface of the hood, and the illuminating unit includes a light source in a light source housing space, and has a communication port in the vicinity of at least one of the microphone and the speaker. Heating means is provided with a communication path to the light source storage space, and heat from the light source is transferred through the communication path to the vicinity of the microphone or speaker to raise the temperature, thereby utilizing the residual heat of the light source. In a range hood equipped with lighting, it is possible to reduce maintenance work with energy saving and parts saving, and to suppress a reduction in the silencing effect of the active silencer.

  In addition, the shape of the communication path is horizontal or upward in the entire area from the light source storage part to the communication port, so that the effect of heat transfer is increased by utilizing the rising property of the high-temperature air from the light source. Since it can guide to a communication port, the fall prevention effect of a silencing effect can be improved.

  In addition, at least one of the microphone and the speaker is provided above the respective communication paths, and leads to the communication port without blocking the movement of heat against the rising property of the hot air from the light source. Therefore, it is possible to improve the effect of preventing the noise reduction effect from being lowered.

  In addition, it is equipped with at least one of a microphone and a speaker in the communication path, and by placing a microphone or speaker in a place where oil droplets are unlikely to enter the thermal phase path, the adhesion of oil smoke itself is suppressed, The maintenance work can be reduced, and the decrease in the silencing effect of the active silencer can be suppressed.

  In addition, a cover having pores is attached to the communication passage outlet (on the side opposite to the light source housing), and the oil-proof smoke effect by the cover can be obtained, so that the adhesion of oil smoke to the mylophone and the speaker itself can be suppressed, In addition, by removing the cover so that maintenance can be performed, it is possible to further suppress a decrease in the silencing effect of the active silencer.

  In addition, after the operation of the fan and the motor is stopped, at least one of the microphone and the speaker is automatically heated, and an automatic stop system is provided that automatically stops heating after a certain period of time. By performing the oil-proofing effect after the exhaust (ash oil smoke) is completed, the oil attached as oil smoke can be dripped completely, so that maintenance work can be reduced and the decrease in the sound-deadening effect of the active silencer can be suppressed .

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in the side view of the range hood in FIG. 1, the range hood 1 of the present embodiment has a discharge port 2 that communicates with the outdoors and a suction port 3 that sucks air containing oil smoke generated during cooking. 4, an exhaust fan 7 that exhausts air to the outside in an air passage 6 in the hood 4 that connects the discharge port 2 and the suction port 3, a motor 8 that drives the exhaust fan 7, The filter 5 is installed near the suction port 3 to remove oil dust from the sucked air.

  The active silencer 11 attached to the range hood 1 emits into the air path 6 a microphone 9 that detects noise propagating in the air path 6 and a sound having a phase opposite to that of the noise detected by the microphone 9. Thus, the speaker 10 is configured to mute, and an arithmetic controller (not shown) that connects and controls them.

  The hood 4 includes a lighting unit 12 that illuminates the periphery of the cooking device. The lighting unit 12 includes an incandescent bulb or a fluorescent light source 13 stored in a light source storage space 14. An upward passage, a microphone communication passage 16 communicating with a horizontal passage from a microphone communication port 15 provided near the lower end of the microphone 9 and opened in the air passage 6, a passage upward from the light source storage space 14, and a speaker 10 The speaker 9 has a speaker communication path 18 that communicates with a horizontal path from a speaker communication port 17 that is provided in the vicinity of the lower end of the speaker. The microphone 9 and the speaker 10 are transmitted by heat transmitted from the light source 13 to the communication port. It is a heating means to warm the surroundings.

  In addition, after the operation of the exhaust fan 7 and the motor 8 is stopped, the range hood 1 is in a state where the light source 13 is lit for a certain period of time, for example, about 5 minutes, and during this time, the microphone 9 and the speaker 10 are kept warm. Then, an automatic stop method in which the light source 13 is automatically turned off is provided.

  With the above configuration, the exhaust air sucked from the suction port 3 passes through the air passage 6 in the order of the filter 5 and the exhaust fan 7, and is then exhausted from the discharge port 2 to the outside of the hood. Therefore, the fan noise accompanying ventilation is reduced and radiated from the suction port 3 connected to the living room.

  The exhaust air from the suction port 3 becomes an air flow containing oil smoke, and most of the air is collected by the filter 5, but a small amount of oil smoke passes through the filter 5 and enters the air passage 6, and the air passage 6 Oil smoke will adhere to the inner wall.

  Here, the action and effect of reducing the adhesion of oily smoke will be described with reference to FIG.

  As shown in FIG. 2, when the light source 13 is turned on, the light source storage space 14 is filled with hot air due to heat generated by the light source 13. The heat is transmitted from the microphone communication port 15 and the speaker communication port 17 through the microphone communication channel 16 and the speaker communication channel 18, thereby warming the wall surface in the vicinity of the microphone 9 and the speaker 10.

  As a result, the oil that is carried by the exhaust air and adheres to the wall surfaces around the microphone 9 and the speaker 10 in the air passage 6 is warmed, and the oil is likely to drip. Therefore, the oil stays on the microphone 9 and the speaker 10 and then solidifies. It can be prevented that the characteristics of the microphone 9 and the speaker 10 are changed due to adhesion of solidified oil and the silencing effect is lowered, and the maintenance work is reduced and the degradation of the silencing effect of the active silencer 11 is suppressed. it can.

  In addition, since the microphone communication port 15 is below the microphone 9 and the speaker communication port 17 is below the speaker 10, the warmed air crosses the microphone 9 and the speaker 10 and is similar to the air curtain. In principle, oil smoke contained in the exhaust air in the air passage 6 is prevented from adhering to the microphone 9 and the speaker 10, and it is possible to prevent the noise reduction effect due to the characteristic change of the microphone 9 and the speaker 10 from being lowered. .

  In addition, since the microphone communication port 15 and the speaker communication port 17 do not have a downward slope that prevents the upward airflow from the light source storage space 14 to the entire communication port, the effect of heat transfer is not reduced. The effect of preventing the effect from decreasing can be improved.

  In addition, the automatic stop system allows the oil attached as oil smoke to be dripped completely by performing the oil-proof effect by heating even after exhaust (ash oil smoke) is completed, reducing maintenance work and active silencer It is possible to suppress a decrease in the silencing effect.

  In the first embodiment, the communication path and the communication port corresponding to both the microphone 9 and the speaker 10 are provided. However, when it is difficult to route the communication path, the microphone communication path 16 or the speaker communication path 18 is omitted. In this case, only the microphone 9 or the speaker 10 having the communication path can have the effect of suppressing the reduction of the silencing effect.

(Embodiment 2)
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and description will be made with reference to FIGS. 3 and 4.

  As shown in the sectional view of the range hood in FIG. 3, the range hood 21 according to the second embodiment includes a passage extending upward from the light source storage space 14 of the illumination unit 12 and a microphone communication port 15 opened in the air passage 6. A microphone communication path 16 that communicates a horizontal path, a path that extends upward from the light source storage space 14, and a speaker communication path 18 that communicates a horizontal path from a speaker communication port 17 that opens to the air path 6. Yes.

  Here, the microphone 9 is provided inside the microphone communication path 16, and the speaker 10 is provided inside the speaker communication path 18, and heat that heats the microphone 9 and the periphery of the speaker 10 by transferring heat from the light source 13 to the communication port. Further, the microphone communication port 15 and the speaker communication port 17 are each provided with a communication port cover 22 having pores.

  With the above configuration, as shown in FIG. 4, which is a side sectional view of the vicinity of the microphone communication path 16 and the speaker communication path 18, when the light source 13 is turned on, the light source storage space 14 is filled with hot air due to heat generated by the light source 13. It will be. Therefore, by arranging the microphone or speaker in the location where the oil droplets are unlikely to enter the microphone communication path 16 and the speaker communication path 18 where the thermal phase is performed, the adhesion of oil smoke is suppressed, the maintenance work is reduced, and the active type is reduced. A decrease in the silencing effect of the silencing device 11 can be suppressed.

  In addition, the communication port cover 22 structurally suppresses the entry of oil smoke and allows sound to pass through the pores, so that the attachment of oil smoke to the microphone and the speaker can be suppressed and maintenance can be performed by removing the cover. By doing so, it is possible to further suppress a decrease in the silencing effect of the active silencer.

  In the second embodiment, the microphone 9 is provided on the upper wall of the microphone communication path 16, and the speaker 10 is provided on the upper wall of the speaker communication path 18. However, when the microphone 9 is provided on the lower wall, oil has entered. In some cases, it is desirable to provide the oil on the side or top surface in order to avoid oil accumulation.

(Embodiment 3)
In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, detailed description thereof will be omitted, and description will be made with reference to FIG.

  As shown in the side view of the range hood in FIG. 5, the range hood 31 according to the third embodiment is provided with a heating wire 32 for heating the wall surface on the wall surface of the air passage 6 around the microphone 9 and the speaker 10.

  In addition, after the operation of the exhaust fan 7 and the motor 8 is stopped, the range hood 31 is energized by the heating wire 32 for a certain period of time, for example, about 5 minutes, and during this time, the microphone 9 and the speaker 10 are kept warmed, and then automatically In addition, an automatic stop method is provided in which the energization to the heating wire 32 is interrupted.

  With the above configuration, the temperature in the vicinity of the microphone 9 or the speaker 10 is raised, the dripping of oil adhering as oil smoke around the microphone 9 or the speaker 10 is promoted, the amount of oil solidifying is reduced, or the solidification itself By suppressing the above, it is possible to reduce the maintenance work and suppress the decrease in the silencing effect of the active silencer 11.

  In addition, the automatic stop system allows the oil attached as oil smoke to be dripped completely by performing the oil-proof effect by heating even after exhaust (ash oil smoke) is completed, reducing maintenance work and active silencer It is possible to suppress a decrease in the silencing effect.

  The active silencer for a range hood according to the present invention obtains a sufficient silencing effect, protects a microphone and a speaker from oil that causes performance deterioration, and can be used for a long time. It is useful as a silencer to be mounted on.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Discharge port 3 Suction port 4 Hood 5 Filter 6 Air path 7 Exhaust fan 8 Motor 9 Microphone 10 Speaker 11 Active silencer 12 Illumination part 13 Light source 14 Light source storage space 15 Microphone communication port 16 Microphone communication path 17 Speaker Communication port 18 Speaker communication path 21 Range hood 22 Communication port cover 31 Range hood 32 Heating wire

Claims (7)

A hood that is installed above the cooking device and has a discharge port that communicates with the outdoors, and a suction port that sucks in air containing smoke generated during cooking,
A ventilation fan and a motor for exhausting the air in the air passage connecting the discharge port and the suction port to the outside in the hood, and
In a range hood equipped with an active silencer composed of a microphone and a speaker,
A range hood comprising heating means for heating a wall surface around at least one of a microphone and a speaker.   An illuminating unit for illuminating the cooking device is provided on the lower surface of the hood, and the illuminating unit has a configuration in which a light source is accommodated in a light source accommodating space, and the light source accommodating having a communication port in the vicinity of at least one of the microphone and the speaker The cooker hood according to claim 1, wherein a heating means is provided with a communication path to the space.   The range hood according to claim 2, wherein the communication path is horizontal or ascending in the whole area from the light source storage part to the communication port.   The range hood according to claim 2 or 3, wherein at least one of the microphone and the speaker is provided above the respective communication paths.   The range hood according to claim 2 or 3, wherein at least one of a microphone and a speaker is provided in the communication path.   The range hood according to claim 5, wherein a cover having a pore is attached to the communication port.   7. An automatic stop method is provided, wherein after the operation of the fan and the motor is stopped, the periphery of at least one of the microphone and the speaker is automatically heated, and the heating is automatically stopped after a predetermined time has elapsed. A range hood according to any one of the above.

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