JP6145629B2 - Range food - Google Patents

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.

Then, since the present invention to achieve the above object, a discharge port communicated with the outside ya, a hood having a suction port for sucking air, air passage connecting said discharge port and said suction port in the hood a ventilation fan that exhausts air outdoors, microphone and the range hood with an active silencer device comprising a speaker, a microphone and one or the side connected to the air passage for mounting both speaker At least one space is provided, the side space is provided with a side space cover having a plurality of pores for partitioning the side space and the air passage, provided with heating means for heating the side space cover, and further, illumination A hood on the lower surface of the hood, the illumination unit accommodates a light source in a light source storage space, and a communication port is provided in the side space or in the vicinity of the side space cover and the light source storage space, respectively. And a communication path connecting each of the communication port between the over near the light source housing space. This achieves 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 Enlarged view of the side hood in the vicinity of the side hood cover 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 Either or both are provided with at least one side space connected to the air passage for installing, and the side space includes a side space cover having a plurality of pores for partitioning the side space and the air passage, A heating means for warming the side space cover is provided.

  Thereby, since the microphone and the speaker are provided in the side space, it is possible to avoid the microphone and the speaker from being directly affected by the airflow including high-temperature and high-humidity smoke flowing in the ventilation path.

  In addition, by increasing the temperature in the vicinity of the side space cover, the dripping of the oil adhering to the side space cover as oil smoke is promoted, the amount of solidified oil is reduced, or the solidification itself is suppressed, thereby reducing the side space. It is possible to prevent clogging of the pores of the cover, increase the maintenance interval, and suppress the decrease in the silencing effect of the active silencer.

  In addition, an illuminating unit for illuminating the heating cooker is provided on the lower surface of the hood, and the illuminating unit is configured to store the light source in the light source storage space, and a communication port is provided in each of the side space and the light source storage space. A communication path connecting the light source storage space is provided, and the lighting unit and the light source storage space and the communication path serve as heating means for heating the side space cover, and heat of the light source is transferred to the side space via the communication path. By raising the temperature of the side space cover, the remaining heat of the light source can be used, and in the range hood equipped with lighting, the maintenance work is reduced with energy saving and reduced parts, and the silencing effect of the active silencer is reduced. Can be suppressed.

  In addition, an illuminating unit for illuminating the heating cooker is provided on the lower surface of the hood, and the illuminating unit is configured to store the light source in the light source storage space, and has a communication port in the vicinity of the side space cover on the air passage wall surface and the light source storage space. Each is provided with a communication path connecting the side space and the light source storage space, and the illumination unit and the light source storage space and the communication path serve as heating means for heating the side space cover, and heat from the light source is transmitted through the communication path. By moving to the vicinity of the side space cover and raising the temperature of the side space cover, the remaining heat of the light source can be used. A decrease in the silencing effect of the mold silencer can be suppressed.

  In addition, since the communication path is horizontal or ascending from the light source storage part to the communication port, it uses the rising nature of the high-temperature air from the light source to increase the effect of heat transfer and increase the side space. Since it can guide to a cover, the fall suppression effect of a silencing effect can be improved.

  In addition, by making the communication path horizontal or ascending in the region from the light source storage part to the vicinity of the communication port, and by setting the vicinity of the communication port as a downward gradient, using the property of rising hot air from the light source, The effect of heat transfer in the communication path can be increased, and the flowing oil droplets can be prevented from entering the communication path, so that the effect of suppressing the reduction in the silencing effect can be improved.

  In addition, after the user performs the exhaust operation stop operation of the range hood, the area around the side space cover is automatically heated, and an automatic stop method is provided to automatically stop heating after a certain period of time. As a result, the oil adhering as oil smoke can be dropped, so that maintenance work can be reduced and a reduction in the silencing 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 microphone 9 is provided inside the microphone side space 19 connected to the air path 6, and the microphone side space 19 is provided with a microphone side space cover 20 for partitioning the microphone side space 19 and the air path 6.

  A speaker 10 is provided inside the speaker-side space 21 connected to the air passage 6, and a speaker-side space cover 22 for partitioning the speaker-side space 21 and the air passage 6 is provided in the speaker-side space 21.

  Here, the microphone-side space cover 20 and the speaker-side space cover 22 are detachable and have a plurality of pores 23 smaller than the microphone 9.

  Moreover, the lower surface of the food | hood 4 is equipped with the illumination part 12 which illuminates the heating cooker periphery, and the illumination part 12 accommodates the light source 13 of an incandescent bulb or a fluorescent lamp in the light source storage space 14. FIG.

  A microphone communication path 16 communicating with a path extending upward from the light source side microphone communication opening 25 opened in the upper surface of the light source storage space 14 and a path extending horizontally from the microphone communication opening 15 opened in the side wall surface of the microphone side space 19; There is a speaker communication path 18 in which a passage extending upward from the light source side speaker communication opening 26 opened in the upper surface of the light source storage space 14 and a passage extending horizontally from the speaker communication opening 17 opened in the side wall surface of the speaker side space 21 are provided. doing.

  Heat from the light source 13 is transmitted to the microphone communication port 15 and the speaker communication port 17, thereby providing heating means for heating the periphery of the microphone side space cover 20 and the speaker side space cover 22.

  In addition, the range hood 1 is in a state in which the light source 13 is turned on for a certain period of time, for example, about 5 minutes after the user performs the exhaust operation stop operation of the range hood 1, and during this period, the microphone side space cover 20 and the speaker are turned on. There is an automatic stop method in which the side space cover 22 is kept warmed, and then the light source 13 is automatically turned off.

  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 air from the suction port 3 becomes an air flow containing high-temperature and high-humidity oil smoke, and most of the air is collected by the filter 5, but a small amount of oil smoke or the like passes through the filter 5 and enters the air passage 6. . Here, since the microphone 9 is covered with the microphone side space 19 and the microphone side space cover 20, and the speaker 10 is covered with the speaker side space 21 and the speaker side space cover 22, the approach of oil smoke is structurally suppressed. However, since the sound is allowed to pass through the pores 23, it is possible to suppress the adhesion of oil smoke to the microphone 9 and the speaker 10, and it is possible to suppress a decrease in the silencing effect. Moreover, the fall of the silencing effect of an active silencer can further be suppressed by removing a cover so that it can maintain.

  Here, the operation and effect of reducing clogging of the pores 23 in the side space cover due to the adhesion of oily smoke will be described with reference to FIG. 2 which is a side sectional view in the vicinity of the microphone communication path 16 and the speaker communication path 18.

  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. This heat passes through the microphone communication path 16 and is transferred from the microphone communication port 15 through the microphone side space 19 to warm the vicinity of the microphone side space cover 20. Similarly, the heat passing through the speaker communication path 18 is transmitted from the speaker communication port 17 through the speaker side space 21, thereby warming the vicinity of the speaker side space cover 22.

  As a result, the oil that is carried by the exhaust air and adheres to the microphone-side space cover 20 and the speaker-side space cover 22 in the air passage 6 is warmed, and the oil is easy to drip. Therefore, the microphone-side space cover 20 and the speaker-side space cover It is possible to prevent oil from being solidified in the pores 23 of the 22 and clogging the pores 23, thereby reducing maintenance work and suppressing a reduction in the silencing effect of the active silencer 11.

  Further, the microphone communication port 15 does not have a descending slope that prevents the upward airflow from the light source storage space 14 to the microphone communication port 15, and the speaker communication port 17 starts from the light source storage space 14. Since there is no downward slope that hinders the rising airflow in the entire area up to 17, the effect of heat transfer is not reduced, and therefore the effect of suppressing the reduction of the silencing effect can be improved.

  In order not to lower the effect of the rising heat transfer, the light source side microphone communication port 25 and the light source side speaker communication port 26 are arranged on the upper surface of the light source storage space 14, and the microphone communication port 15 is other than the upper surface of the microphone side space 19. The speaker communication port 17 is preferably provided on a wall surface other than the upper surface of the speaker-side space 21.

  In addition, the oil stop effect by heating is performed even after the exhaust operation stop operation by the automatic stop method, so that the oil adhering as oil smoke can be dripped completely, reducing the maintenance work and silencing the active silencer Reduction of the effect can be suppressed. In order to promote heat transfer to the microphone-side space cover 20 and the speaker-side space cover 22, it is preferable to perform the fan / motor remaining operation for a certain time after the exhaust operation stop operation.

  In the first embodiment, a side space, a side space cover, and a communication path corresponding to both the microphone 9 and the speaker 10 are provided in order to ensure a sufficient distance required for control calculation between the microphone 9 and the speaker 10. However, when it is difficult to route the side space or the communication path, the microphone 9 and the speaker 10 may be housed in one side space.

(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, 4, and 5.

  As shown in the sectional view of the range hood in FIG. 3, the range hood 1 according to the second embodiment is installed in the passage extending upward from the light source storage space 14 of the illumination unit 12 and in the vicinity of the lower end of the microphone-side space cover 20. A microphone communication path 16 communicating with a horizontal path having a downward gradient area around the microphone communication opening 15 opened in the path 6, a path upward from the light source storage space 14, and a wind provided near the lower end of the speaker-side space cover 22 The speaker communication port 17 that opens to the path 6 has a speaker communication channel 18 that communicates a horizontal channel having a downward gradient region, and heat from the light source 13 is transmitted to the communication port so that the microphone side space cover 20 and the speaker are connected. This is a heating means for heating the periphery of the side space cover 22.

  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. 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 to warm the vicinity of the microphone side space cover 20 and the speaker side space cover 22.

  As a result, the oil that is carried by the exhaust air and adheres to the microphone-side space cover 20 and the speaker-side space cover 22 in the air passage 6 is warmed, and the oil is likely to drip. Therefore, the microphone-side space cover 20 and the speaker-side space cover It is possible to prevent oil from being solidified in the pores 23 of the 22 and clogging the pores 23, thereby reducing maintenance work and suppressing a reduction in the silencing effect of the active silencer 11.

  Further, as shown in FIG. 4 which is a side sectional view in the vicinity of the microphone communication path 16 and the speaker communication path 18, the microphone communication path 16 in the vicinity of the microphone communication port 15 has a downward slope, and the speaker communication in the vicinity of the speaker communication port 17. By setting the passage 18 to be a downward slope, the oil droplets attached to the microphone-side space cover 20 and the speaker-side space cover 22 are warmed and flow downward to prevent entry into the communication passage.

  Here, as shown in FIG. 5, which is an enlarged view of the vicinity of the side space cover, by providing a communication port in the vicinity of the lower end of the side space cover, the warmed air that flows out from the communication port to the air channel 6 is Since the airflow in 6 becomes an ascending airflow and crosses the microphone side space cover 20 and the speaker side space cover 22, heat transfer can be performed more efficiently.

  In the second embodiment, a communication port and a communication path corresponding to both the microphone-side space cover 20 and the speaker-side space cover 22 are provided. If it is difficult to route the communication path, the lower end of the microphone-side space cover 20 is provided. A communication path whose vicinity is a communication port may be omitted.

(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 sectional view of the range hood in FIG. 6, the range hood 1 of the third embodiment warms the microphone-side space cover 20 and the speaker-side space cover 22 to the microphone-side space cover 20 and the speaker-side space cover 22. A heating wire 24 is attached.

  In addition, after the user performs the exhaust operation stop operation of the range hood 1, the heating wire 24 is energized for a certain period of time, for example, about 5 minutes. During this period, the microphone side space cover 20 and the speaker side space cover 22 are energized. Is provided with an automatic stop method in which the energization to the heating wire 24 is automatically interrupted thereafter.

  With the above configuration, the oil that is carried by the exhaust air and adheres to the microphone-side space cover 20 and the speaker-side space cover 22 in the air passage 6 is warmed and the oil easily drops, so the microphone-side space cover 20 and the speaker-side space It is possible to prevent oil from coagulating in the pores 23 of the cover 22 and clogging the pores 23 to reduce the silencing effect, thereby reducing the maintenance work and suppressing the degradation of the silencing effect of the active silencer 11. it can.

  In addition, the oil stop effect by heating is performed even after the exhaust operation stop operation by the automatic stop method, so that the oil adhering as oil smoke can be dripped completely, reducing the maintenance work and silencing the active silencer Reduction of the effect can be suppressed.

  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 channel 19 Microphone side space 20 Microphone side space cover 21 Speaker side space 22 Speaker side space cover 23 Pore 24 Heating wire 25 Light source side microphone communication port 26 Light source side speaker communication port

Claims (4)

A discharge port which communicates with the outside of ya, and a hood having a suction port for sucking the air,
A ventilation fan for exhausting the air in the air passage connecting the discharge port and the suction port in the hood to the outside ;
In a range hood equipped with an active silencer comprising a microphone and a speaker,
At least one side space connected to the air path for installing either or both of the microphone and the speaker is provided, and the side space has a plurality of parts for partitioning the side space and the air path. With a side space cover having pores;
Furthermore, an illumination part is provided on the lower surface of the hood, the illumination part accommodates a light source in a light source accommodation space, a communication port is provided in the side space or the vicinity of the side space cover and the light source accommodation space, respectively, and the side space or the side space cover is provided. A range hood comprising a communication passage connecting each communication port between the vicinity and the light source storage space. The range hood according to claim 1, wherein the communication path starting from the light source storage unit and ending at the communication port of the side space is horizontal or uphill. In the communication path starting from the light source storage part and ending at the communication port near the side space cover,
The range hood according to claim 1, wherein a region of the communication path from the start point to the vicinity of the communication port is a horizontal or ascending gradient, and a region of the communication path from the vicinity of the communication port to the end point is a down gradient. The range hood according to any one of claims 1 to 3, wherein after the exhaust operation of the range hood is stopped, the illumination unit is turned off after being turned on for a certain period of time.

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