JP2019219167A - Range hood - Google Patents

Abstract

To provide a range hood which rotates a filter and reduces a possibility of noise generation.SOLUTION: There is provided a range hood 1 that comprises: a fan 4 which generates a flow of air; a filter 10 which has a hole in a flow passage of the flow of air upstream from the fan and allowing the flow of air to pass through; an electric motor 20 which rotates the filter; and a control part 30 which controls, on the basis of information from a cooking state monitor part 40 monitoring a cooking state in a cooker, rotation of the electric motor to at least two rotating speeds, i.e. a first rotating speed and a second rotating speed faster than the first rotating speed, the rotating speed of the electric motor being controlled to the first rotating speed and second rotating speed separately from the rotation control over the fan.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a range hood, and more particularly to a range hood for rotating a filter.

  Conventionally, a range hood that rotates a filter during an exhaust operation has been proposed. For example, Patent Literature 1 discloses a range hood having small pressure loss and good oil collecting efficiency. This range hood is a fan that generates an air flow, a filter that is on the air flow path and upstream of the fan and has a hole that allows the air flow to pass, and an electric motor that rotates the filter, An oil collecting member surrounding the periphery of the filter, and a control unit for controlling rotation of the fan and the electric motor are provided.

JP 2013-139945 A

However, such a range hood may generate noise such as wind noise when the filter rotates at high speed.
Therefore, the present invention provides a range hood that reduces the chance of generating noise.

In order to solve the above-mentioned problem, a range hood provided above or near a cooker, a fan that generates an air flow, and a fan that exists on a flow path of the air flow and upstream of the fan. A filter having a hole through which the air flows, a motor for rotating the filter, and a rotation of the motor based on information from a cooking state monitoring unit that monitors a cooking state of the cooking device, at least, A control unit for controlling the motor to rotate at two first rotation speeds and a second rotation speed higher than the first rotation speed, wherein the control unit controls the electric motor at the first rotation speed and the second rotation speed. And a range hood for controlling the rotation speed of the fan separately from the rotation control of the fan.
According to this, by controlling the rotation speed of the electric motor that rotates the filter in accordance with the cooking state, it is possible to provide a range hood in which the filter is rotated at a high speed only when necessary and the opportunity for noise generation is reduced.
By rotating the filter at a high speed when the mass concentration of the oil particles contained in the oil smoke is equal to or higher than a predetermined threshold value, it is possible to reduce the chance of generating loud noise.

Note that if the determination unit determines that the oil smoke is generated at or above the predetermined threshold and then determines that the predetermined threshold or a threshold different from the predetermined threshold is not generated, the control unit immediately starts rotating the motor. Stop, or immediately rotate the motor at the first rotation speed, or stop the motor after maintaining the second rotation speed for a predetermined time, or after maintaining the second rotation speed for a predetermined time. The motor may be rotated at a first rotation speed.
According to this, when oil fumes no longer exceed the predetermined threshold, control is performed such that the filter is slowed down or stopped, so that the chance of noise generation can be reduced.

The cooking state monitoring unit may be separate from the range hood, and may perform wireless communication with the control unit.
According to this, since the cooking state monitoring unit is separate from the range hood, it can be arranged at a position suitable for the monitoring target.

  As described above, according to the present invention, it is possible to provide a range hood in which a filter is rotated at a high speed only when necessary, thereby reducing the chance of noise generation.

(A) Front elevation view, (B) Side elevation view when the range hood of the first embodiment according to the present invention is installed in a kitchen. FIG. 3A is a bottom view of the range hood according to the first embodiment of the present invention, and FIG. FIG. 3 is a cross-sectional view of the range hood according to the first embodiment of the present invention taken along a line II in FIG. 2. 1A is a perspective view and FIG. 2B is an enlarged perspective view of a range hood according to a first embodiment of the present invention. 5 is a flowchart illustrating a method of controlling a range hood according to a first embodiment of the present invention. 5 is a flowchart illustrating a method of controlling a range hood according to a first modification of the first embodiment of the present invention. 9 is a flowchart illustrating a method of controlling a range hood according to a second modification of the first embodiment according to the present invention. 9 is a flowchart illustrating a method of controlling a range hood according to a third modification of the first embodiment of the present invention. (A) Front elevation and (B) Side elevation when the range hood of the second embodiment according to the present invention is installed in a kitchen. (A) Front elevation and (B) Side elevation when the range hood of the third embodiment according to the present invention is installed in a kitchen. (A) Front elevation and (B) Side elevation when the range hood of the fourth embodiment according to the present invention is installed in a kitchen.

Hereinafter, each embodiment will be described with reference to the drawings.
<First embodiment>
The range hood 1 according to the present embodiment will be described with reference to FIGS. The range hood 1 is installed in a kitchen in which a cooking device CD is installed, and is arranged above the cooking device CD, as shown in FIG. And exhaust the purified air outside. The range hood 1 has a thin hood portion 2 having an inner surface panel 5 having a concave upper portion on an inner surface for collecting oil smoke and the like generated by cooking performed below. Although the range hood 1 of the present embodiment is disposed above the cooking device CD, it may be located near the side of the cooking device CD.

  As shown in FIGS. 2 to 4, the hood portion 2 is connected to a blower box 3 connected to an exhaust duct (not shown) in the vicinity of a communication port 6 of an inner panel 5 located on the upper rear side. . The blower box 3 is located on the back side of the curtain plate 9 and has a fan 4 that is a sirocco fan and generates an air flow D1 inside. Therefore, when the fan 4 operates, the communication port 6 becomes negative pressure, and the air below the inner panel 5 is sucked through the communication port 6 and discharged to the outside through the exhaust duct. The communication port 6 communicates with the fan 4 and is located on the flow path of the air flow D1 generated by the fan 4 and on the upstream side of the air flow from the fan 4.

  The range hood 1 has a disc-shaped filter 10 having a hole 11 through which the air flow D1 passes at a position of the communication port 6, and an electric motor 20 having a shaft connected to the center of the disc-shaped filter 10 and rotating the filter 10. And an oil collecting member 60 attached to the inner panel 5 and arranged so as to surround the outer peripheral edge of the filter 10. Therefore, the range hood 1 is located on the flow path of the flow D1 of the air generated by the fan 4 and located upstream of the flow of the fan 4 and allows the flow of the air to pass upward from the bottom in the drawing. A filter 10 having 11 is rotatably provided.

  Further, the range hood 1 includes a control unit 30 that controls the rotation of the fan 4 and the electric motor 20, an operation unit 70 that receives a user operation and outputs an operation / stop signal of the range hood 1 to the control unit 30. , Is provided. The control unit 30 is constituted by a known microcomputer including a control program describing a method for controlling the rotation of the fan 4 and the electric motor 20, which will be described later. The operation unit 70 is configured by a switch operated by a user of the range hood 1, and is disposed on a front side surface of the hood unit 2. Of course, the present invention is not limited to this, and may be configured to receive a signal from a remote controller separate from the range hood 1 or a signal from the cooker and output the signal. The operation unit 70 outputs to the control unit 30 not only an operation signal / stop signal of the range hood 1 but also a signal instructing a change in the rotation speed of the fan 4 and the electric motor 20.

The air below the inner panel 5 contains steam, oily smoke, etc. generated by cooking. When the fan 4 is operated, the air is present in the communication port 6, that is, on the flow path of the air flow D1 generated by the fan 4. Therefore, it is sucked into the hole 11 of the filter 10 located on the upstream side of the fan 4 and passes through the hole 11. When receiving the operation signal from the operation unit 70, the control unit 30 rotates the fan 4 to generate the airflow D <b> 1, and rotates the filter 10 rotatably provided by the motor 20 to energize the motor 20. Let it. The range hood 1 collects the oil contained in the air by the oil collecting member 60 by rotating the filter 10.

  The method of collecting oil will be described in detail. The heated air rises toward the range hood 1 together with steam, oil smoke, and the like generated by cooking performed below the range hood 1. When the range hood 1 starts operating and the fan 4 starts rotating, the fan 4 generates a flow of air. Then, the air rising around the current plate 7 is sucked from between the current plate 7 and the inner panel 5, and then passes through the hole 11 of the filter 10 and is sucked into the fan 4 in the blower box 3. Thereafter, the air is discharged from the blower box 3 to an exhaust duct.

  In the operating state, the control unit 30 rotates the electric motor 20 that rotates the filter 10 when the range hood 1 is rotating the fan 4 that generates the flow of air to collect oil smoke and the like generated by cooking. Control as follows. The number of rotations of the filter 10 per unit time may be at least 230 rpm (Rotation Per Minute) or more, depending on the opening state of the filter holes. When the filter 10 rotates at such a high speed, the surface of the filter 10 (portion without the holes 11) drags air in contact with the surface by frictional force, and the movement is transmitted to nearby air due to the viscosity of the air. Therefore, the movement of air is generated near the surface of the filter 10 and the filter 10 is rotating, so that the movement of air becomes a vortex around the shaft of the electric motor 20.

  This swirling air movement occurs on both sides of the filter 10, that is, on both the lower and upper surfaces of the filter 10, in other words, on both the upstream and downstream surfaces of the air flow of the filter 10. In the present embodiment, the flow of air generated by the fan 4 flows through the holes 11 of the filter 10, so that on the downstream side of the filter 10, the vortex air moves while being separated from the surface of the filter 10. A spiral flow is generated toward the outer peripheral edge of the filter 10 and is sucked by the fan 4. On the other hand, on the upstream side of the filter 10, the movement of the vortex air is suppressed on the surface of the filter 10, and a high-density air layer with a vortex flow toward the outer peripheral edge of the filter 10 is formed.

  The oil generated during cooking or the like flows along with the flow of air and reaches near the upstream surface of the filter 10. Some of the oil that has reached near the upstream surface (oil with a relatively small particle diameter) is partly due to the vortex flow toward the outer periphery of the dense air layer, and the other part (the oil with a relatively large particle diameter). The oil component collides with the upstream surface of the filter 10 (the portion without the holes 11), and is thereby flied off toward the outer peripheral edge of the filter 10. As a result, the oil is collected and collected by the oil collecting member 60 provided so as to surround the outer peripheral edge of the disc-shaped filter 10. Therefore, the range hood 1 of the present embodiment hardly causes oil to adhere to a portion downstream of the filter 10 in the air flow path, and greatly reduces the trouble of cleaning / washing the fan 4 and the exhaust duct downstream of the filter 10. can do.

  On the other hand, when the filter 10 rotates, especially when it rotates at a high speed, the movement of air near the surface of the filter 10 also increases, and a sound such as a wind noise is generated. The range hood 1 rotates the filter 10 at high speed only when necessary, and reduces the chance of noise generation. The range hood 1 further includes a cooking state monitoring unit 40 that monitors the cooking state of the cooking device CD, and whether or not oil smoke is generated at a predetermined threshold or more based on the cooking state that the cooking state monitoring unit 40 monitors. The determination unit 50 is provided.

In the case of the present embodiment, the cooking state monitoring unit 40 is a smoke sensor that is provided at an end of the inner panel 5 and detects smoke in the air. The smoke sensor is not particularly limited as long as it measures the concentration of particles in the air. For example, the smoke sensor irradiates light in the direction of the cooker CD, and measures the amount of scattered light to cook the smoke. A method of detecting the mass concentration of oil particles contained in the oil smoke rising from the vessel CD may be used.

  The determination unit 50 determines whether or not oil smoke is generated at a predetermined threshold or more based on the cooking state monitored by the smoke sensor of the cooking state monitoring unit 40. For example, the predetermined threshold value may be determined by acquiring in advance the mass concentration of oil particles contained in oil smoke when cooking a fried or fried food with oil, or the like.

  The control unit 30 controls the motor 20 or the filter 10 to rotate at various rotational speeds, and controls the motor 20 to rotate at at least two first rotational speeds and a second rotational speed higher than the first rotational speed. The first rotation speed is a relatively low rotation speed at which almost no noise such as wind noise is generated, and is, for example, about 500 rpm. Note that the first rotation speed may be lower than the second rotation speed, that is, includes zero. The second rotation speed is a relatively high rotation speed at which sound such as wind noise is relatively large, and is, for example, about 1500 rpm. The higher the speed of rotation of the filter 10, the stronger the air flow of the vortex flow and the higher the efficiency of collecting the oil. Therefore, when the concentration of the oil particles in the smoke becomes high, the speed becomes relatively high. Preferably, it rotates. Therefore, the control unit 30 controls the rotation speed of the electric motor 20 at the relatively low first rotation speed and the relatively high second rotation speed in accordance with the cooking state monitored by the cooking state monitoring unit 40. As described above, by controlling the rotation speed of the electric motor 20 that rotates the filter 10 according to the cooking state, the range hood 1 in which the filter 10 is rotated at a high speed only when necessary and the opportunity for noise generation is reduced is provided. Can be provided.

  More specifically, the determination unit 50 determines whether or not oil smoke is generated at or above a predetermined threshold based on the cooking state monitored by the cooking state monitoring unit 40. Is determined to occur at or above a predetermined threshold, the electric motor 20 is rotated at the relatively high second rotation speed. As described above, by rotating the filter 10 at a high speed only when the oil smoke is generated at or above the predetermined threshold value, it is possible to reduce the chance of generating a loud noise.

  A control method of the control unit 30 will be described with reference to FIG. Note that S in the flowchart means a step. The control unit 30 starts the operation of the range hood 1 by the user operating the operation unit 70 in S100. That is, the control unit 30 rotates the fan 4 to generate an air flow, rotates the filter 10 at the first rotation speed having a relatively low noise level and a relatively low noise level, and causes the smoke sensor of the cooking state monitoring unit 40 to emit oil smoke. Start monitoring the condition.

  In S102, the cooking state monitoring unit 40 detects the amount of generated oil smoke (mass concentration of oil particles contained in the oil smoke) and transmits the detected amount to the control unit 30. In S104, the control unit 30 checks whether or not the amount of generated oil smoke detected by the cooking state monitoring unit 40 is equal to or greater than a predetermined threshold. If the amount of generated oil smoke is equal to or greater than the predetermined threshold, the control unit 30 rotates the filter 10 at a relatively high second rotation speed in S106. If the amount of generated oil smoke is less than the predetermined threshold, the step of S106 is skipped, and the low noise level is maintained.

  In step S108, the control unit 30 checks whether a signal for terminating the operation has been received from the operation unit 70 or the like. If the signal has not been received, S104 to S108 are repeated to continue the operation. When the signal is received, the operation of the range hood 1 is ended in S110. That is, the control unit 30 terminates the rotation of the fan 4, terminates the rotation of the filter 10, and stops monitoring the state of the oily smoke by the smoke sensor of the cooking state monitoring unit 40. As described above, only when the oil smoke is equal to or more than the predetermined threshold value, by performing the high-speed rotation of the filter that generates the loud noise, it is possible to reduce the chance of generating the loud noise. Note that, after receiving a signal to end the operation from the operation unit 70 or the like, the remaining operation may be performed. The remaining operation may be such that the filter 10 is rotated until a certain time has elapsed, or may be based on the monitoring result of the cooking state monitoring unit 40.

  With reference to FIG. 6, a modified example (first modified example) of the control method will be described. In order to avoid redundant description, the same steps as those in the above-described embodiment will not be described, and different points will be mainly described. S200 to S210 are the same as S100 to S110. In S204, the control unit 30 checks whether or not the amount of generated oil smoke detected by the cooking state monitoring unit 40 is equal to or greater than a predetermined threshold. If the amount of generated oil smoke is equal to or greater than the predetermined threshold, the control unit 30 rotates the filter 10 at a relatively high second rotation speed in S206. If the amount of generated oil smoke is less than the predetermined threshold, the control unit 30 sets the rotation speed of the filter 10 to zero, that is, stops the rotation of the filter 10 in S212. As described above, the control unit 30 once rotates the filter 10 at the relatively low first rotation speed in S200, but when the amount of generated oil smoke is smaller than the threshold value, the rotation of the filter 10 is stopped and no noise is generated. You may do so.

  A modification (second modification) of the control method will be described with reference to FIG. In order to avoid redundant description, the same steps as those in the above-described embodiment will not be described, and different points will be mainly described. S300 to S310 are the same as S100 to S110. In step S304, the control unit 30 checks whether or not the amount of generated oil smoke detected by the cooking state monitoring unit 40 is equal to or greater than a predetermined threshold. When the amount of generated oil smoke is equal to or greater than the predetermined threshold, the control unit 30 rotates the filter 10 at a relatively high second rotation speed in S306. If the amount of generated oil smoke is less than the predetermined threshold, the control unit 30 rotates the rotation speed of the filter 10 at a relatively low first rotation speed in S312. According to this, even if the amount of generated oil smoke exceeds the threshold once and the rotation of the filter 10 is controlled at the relatively high second rotation speed, if the amount of generated oil smoke becomes smaller than the predetermined threshold, the amount of oil smoke becomes relatively small. The first rotation speed can be returned to the low first rotation speed, whereby the chance of generating a loud noise can be reduced.

  A modification (third modification) of the control method will be described with reference to FIG. In order to avoid redundant description, the same steps as those in the above-described embodiment will not be described, and different points will be mainly described. S400 to S410 are the same as S100 to S110. In step S404, the control unit 30 checks whether or not the amount of generated oil smoke detected by the cooking state monitoring unit 40 is equal to or greater than a predetermined threshold. When the generation amount of the oil smoke is equal to or larger than the predetermined threshold, the control unit 30 rotates the filter 10 at the relatively high second rotation speed in S406. When the generation amount of the oily smoke is less than the predetermined threshold value, the control unit 30 maintains the rotation speed before the predetermined time period in S412. That is, the amount of generated oil smoke temporarily exceeds the threshold value, and the rotation of the filter 10 is controlled at the relatively high second rotation speed. Thereafter, the amount of generated oil smoke becomes smaller than the predetermined threshold value and the first rotation speed becomes relatively low. Even when returning, the second rotation speed, which is relatively high, is maintained for a while. After that, in S414, the control unit 30 rotates the rotation speed of the filter 10 at a relatively low first rotation speed. As described above, by maintaining the high second rotation speed for a while, it is possible to sufficiently collect oil smoke and the like.

  As described above, when the determination unit 50 determines that the oil smoke is generated not less than the predetermined threshold and then determines that the oil smoke is not generated not less than the predetermined threshold, the control unit 30 immediately stops the rotation of the electric motor 20. Alternatively, the rotation of the motor 20 is immediately rotated at the first rotation speed having a low noise level, or the rotation of the motor 20 is stopped after maintaining the second rotation speed having a high collection efficiency for a predetermined time, or After maintaining the two rotation speeds, the rotation of the electric motor 20 may be rotated at the first rotation speed. According to this, when oil fumes no longer exceed the predetermined threshold value, by controlling the filter 10 to slow down or stop, the chance of noise generation can be reduced.

In the present embodiment, the case is described where the determination unit 50 determines that the oil smoke is generated at or above the predetermined threshold and then determines that the oil smoke is not generated at or above the predetermined threshold. After it is determined that the oil smoke is generated at or above the predetermined threshold value, the subsequent control may be performed based on a threshold value different from the predetermined threshold value. That is, if the determination unit 50 determines that oil smoke is generated not less than the predetermined threshold and then determines that no oil smoke is generated not less than the predetermined threshold, the control unit 30 immediately stops the rotation of the electric motor 20. Or immediately rotate the motor 20 at the first rotation speed with a low noise level, or stop the rotation of the motor 20 after maintaining the second rotation speed with a high collection efficiency for a predetermined time, or After maintaining the second rotation speed for a time, the rotation of the electric motor 20 may be rotated at the first rotation speed.

  The air flow of the air flow generated by the fan 4 includes at least two first air volumes and a second air volume larger than the first air volume, and when the fan 4 generates the air flow of the second air volume. The second rotation speed is faster than the second rotation speed when the fan 4 is generating the air flow of the first air volume, and is the first rotation speed when the fan 4 is generating the air flow of the second air volume. The rotation speed may be higher than the first rotation speed when the fan 4 is generating the first airflow. According to this, when the fan 4 that generates the airflow is rotating at high speed, the noise caused by the filter 10 is eliminated. In this case, even if the rotation speed of the filter 10 is increased, the noise is considered to be noise. Because it is difficult, by controlling the rotation speed of the filter 10 according to the high-speed rotation and the low-speed rotation of the fan 4, it is possible to reduce the chance of noise generation and maintain high oil collection efficiency. Further, since the flow rate of the oil smoke passing through the filter varies depending on the air volume, the required rotation speed of the filter 10 varies. Therefore, the first rotation speed and the second rotation speed can be reduced when the air volume is relatively small, and the noise generated due to the rotation of the filter 10 is reduced while maintaining high oil collection efficiency. It becomes possible.

<Second embodiment>
The range hood 1A according to the present embodiment will be described with reference to FIG. In order to avoid redundant description, description of the same components as those in the above-described embodiment will be omitted by attaching the same reference numerals, and different points will be mainly described. The range hood 1A includes a fan 4 that generates an air flow, a filter 10 that is located on the air flow path and upstream of the fan, and has a hole that allows the air flow to pass through, and rotates the filter 10. An electric motor 20, a control unit 30 for controlling the rotation of the electric motor 20 to rotate at at least two first rotational speeds and a second rotational speed higher than the first rotational speed, and monitoring a cooking state of the cooker CD. And a cooking state monitoring unit 40A.

  The cooking state monitoring unit 40A is a pan bottom temperature sensor that detects the temperature of the pan bottom provided in the cooker CD. The pan bottom temperature sensor may be a known sensor used in a cooker, and has communication means for transmitting the temperature to the range hood 1A. The range hood 1A receives the temperature of the pan bottom from the communication means and controls the temperature. It has a communication unit (not shown) for transmitting to the unit 30. For example, when the temperature at the bottom of the pot greatly exceeds 100 ° C. and it is considered that cooking is performed using oil, the cooking state monitoring unit 40A transmits information on the temperature to the control unit 30. When receiving such information, the control unit 30 may rotate the filter 10 at a relatively high second rotation speed. In this way, only when the bottom of the pot in the cooking device CD is cooking above a predetermined temperature, the high-speed rotation of the filter 10 that generates a loud noise reduces the chance of generating a loud noise. Can be done.

<Third embodiment>
The range hood 1B according to the present embodiment will be described with reference to FIG. In order to avoid redundant description, description of the same components as those in the above-described embodiment will be omitted by attaching the same reference numerals, and different points will be mainly described. Range hood 1 </ b> B includes a fan 4 that generates an air flow, a filter 10 that is located on the air flow path and upstream of the fan, and has a hole that allows the air flow to pass through, and rotates filter 10. An electric motor 20, a control unit 30 for controlling the rotation of the electric motor 20 to rotate at at least two first rotational speeds and a second rotational speed higher than the first rotational speed, and monitoring a cooking state of the cooker CD. And a cooking state monitoring unit 40B.

  In the case of the present embodiment, the cooking state monitoring unit 40B is a temperature sensor that is provided at an end of the inner panel 5 and that detects the temperature of a pot on the cooker CD and the contents thereof. The method of the temperature sensor is not particularly limited as long as it measures the temperature without contact, such as an infrared camera. In this embodiment, the cooking state monitoring unit 40B is used in combination with the above-described cooking state monitoring unit 40 of the smoke sensor and the cooking state monitoring unit 40A of the pan bottom temperature sensor, and the control unit 30 integrates these sensors. It is possible to control the rotation speed of the filter 10 by making a judgment. Of course, the cooking state monitoring unit 40B may be used alone. As described above, when the temperature of the pot or the like and the contents thereof in the cooking device CD is higher than the predetermined temperature and cooking is being performed, the high-speed rotation of the filter 10 that generates the loud noise causes the loud noise. Can be reduced.

  In the case of a cooking device having a plurality of heating sources, when cooking is performed by a plurality of heating sources, if at least one of the heating sources exceeds a predetermined temperature, the filter 10 is turned to the second rotation speed. May be rotated. Further, in the case of a cooker having a grill, when using a grill, it may be rotated at the second rotation speed. The use of the grill may be detected by detecting the temperature in the vicinity of the grill outlet by a temperature sensor provided in the range hood, or cooking menu information selected by a cooker or cooking related to an operation of igniting the grill. The measurement may be performed by the range hood receiving the instrument signal. When the temperature near the grill outlet is detected by a temperature sensor provided in the range hood, it may be determined that the grill is used if the temperature near the grill outlet exceeds a specified value lower than a predetermined temperature. . This is because the temperature near the grill outlet becomes lower than the temperature inside the grill to be actually heated.

<Fourth embodiment>
A range hood 1C according to the present embodiment will be described with reference to FIG. In order to avoid redundant description, description of the same components as those in the above-described embodiment will be omitted by attaching the same reference numerals, and different points will be mainly described. The range hood 1C includes a fan 4 that generates an air flow, a filter 10 that is on the air flow path and upstream of the fan, and that has a hole that allows the air flow to pass through, and rotates the filter 10. An electric motor 20, a control unit 30 for controlling the rotation of the electric motor 20 to rotate at at least two first rotational speeds and a second rotational speed higher than the first rotational speed, and monitoring a cooking state of the cooker CD. And a cooking state monitoring unit 40C.

  In the case of the present embodiment, the cooking state monitoring unit 40C is a sound sensor that is attached to a wall surface between the range hood 1C and the cooking device CD and that collects a sound of cooking performed on the cooking device CD. The cooking state monitoring unit 40C is separate from the range hood 1C and performs wireless communication with the control unit 30 in order to better collect the sound of cooking performed on the cooker CD. The sound sensor preferably has directivity to a pot or the like on the cooker CD, collects the frequency and size thereof, and analyzes what kind of cooking is being performed.

  For example, the cooking state monitoring unit 40C distinguishes between a sound of frying or stir-fry using oil and a sound of boiling boiled water or hot water. If the former sound is heard, the information of the temperature is controlled by the control unit. 30. When receiving such information, the control unit 30 may rotate the filter 10 at a relatively high second rotation speed. As described above, by performing high-speed rotation of the filter 10 that generates loud noise depending on the state and attributes of the sound generated on the cooking device CD, the chance of generating loud noise can be reduced. Further, since the cooking state monitoring unit 40C is separate from the range hood 1C, the cooking state monitoring unit 40C can be disposed at a position suitable for a monitoring target.

In the present embodiment, the cooking state monitoring unit 40C is used in combination with the above-described cooking state monitoring unit 40A of the pan bottom temperature sensor, and the control unit 30 determines these sensors comprehensively and The rotation speed can be controlled. For example, when the sound sensor of the cooking state monitoring unit 40C detects that the sound of the deep-fried food is being generated, the control unit 30 detects that the pot bottom temperature sensor of the cooking state monitoring unit 40 detects 100 ° C or less. Alternatively, the filter 10 may be controlled at a relatively low first noise speed with a low noise level. Of course, the cooking state monitoring unit 40C may be used alone.

  It should be noted that the present invention is not limited to the illustrated embodiment, and can be implemented with a configuration that does not deviate from the contents described in the claims. That is, the present invention has been particularly shown and described with particular reference to particular embodiments, but without departing from the spirit and purpose of the invention, Those skilled in the art can make various modifications in application examples and other detailed configurations.

  For example, the cooking state monitoring unit emits a temperature sensor that detects the temperature of an object placed on the cooker CD, a color sensor that detects the color of the object placed on the cooker CD, and an object placed on the cooker CD. A sound sensor for detecting sound, a particle sensor for detecting particles existing in the space between the cooker CD and the range hood, cooking menu information selected by the cooker, and a cooker operating state for detecting the operating state of the cooker The cooking state may be monitored based on any of the sensors or information obtained by combining the sensors.

  Further, the present invention is not limited to the range hood, but may be any device that uses a cooking device to collect oil smoke generated from the food, and may be, for example, a lighting device with an air purifier.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Hood part 3 Blower box 4 Fan 5 Inner panel 6 Communication port 7 Rectifier plate 9 Curtain plate 10 Filter 11 Hole 20 Motor 30 Control unit 40 Cooking state monitoring unit 50 Judgment unit 60 Oil collecting member 70 Operating unit D1 Air Direction of flow CD cooker

Claims (2)

A range hood provided above or near the cooker,
A fan to generate airflow,
A filter that is located on the flow path of the air flow and upstream of the fan and that has a hole through which the air flow passes;
An electric motor for rotating the filter,
The motor is rotated at at least two first rotation speeds and a second rotation speed higher than the first rotation speed based on information from a cooking state monitoring unit that monitors a cooking state of the cooker. A control unit for controlling the
With
The range hood, wherein the control unit controls the rotation speed of the electric motor separately from the rotation control of the fan at the first rotation speed and the second rotation speed.
  The range hood according to claim 1, wherein the cooking state monitoring unit includes one or more of a smoke sensor, a pan bottom temperature sensor, a temperature sensor, a sound sensor, a color sensor, a cooker operating state sensor, and a particle sensor.

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