TW202142812A - Range hood - Google Patents

Abstract

The purpose of the present invention is to reduce the possibility that noise is generated in a range hood in which a filter is caused to rotate. Provided is a range hood (1) comprising: a fan (4) for generating air flow; a filter (10) that is on the flow path of the air flow and exists on the upstream side of the fan, and has holes for allowing the air flow to pass therethrough; an electric motor (20) for rotating the filter; a control unit (30) that executes control by which the electric motor is caused to rotate at least two speeds, specifically a first rotation speed and a second rotation speed faster than the first rotation speed; and a cooking state monitoring unit (40) for monitoring the cooking state of a cooking device. According to the cooking state monitored by the cooking state monitoring unit, the control unit controls the rotation speed of the electric motor, using the first rotation speed and the second rotation speed.

Description

Range hood

The invention relates to a range hood, in particular to a range hood that rotates a filter.

In the past, a range hood that rotates the filter during the exhaust operation has been proposed. For example, Patent Document 1 discloses a range hood with a small pressure loss and high oil collection efficiency. This range hood is equipped with: a fan, which generates an air flow; a filter, which exists in the flow path of the air flow on the upstream side of the fan and has holes for passing the air flow; an electric motor which rotates the filter; and an oil trap Components, which surround the filter; and a control section, which controls the rotation of the fan and the motor.

Patent Document 1: JP 2013-139945 A.

However, such a range hood sometimes generates noise such as wind noise when the filter rotates at a high speed.

Therefore, the present invention provides a range hood that reduces the chance of noise generation.

In order to solve the above-mentioned problems, a range hood is provided, which is installed above or near a cooker, and is provided with: a fan which generates an air flow; It has holes for passing air flow; a motor that rotates the filter; a control part that rotates the motor at at least two rotation speeds, namely a first rotation speed and a second rotation speed faster than the first rotation speed Control the rotation of the motor; and a cooking state monitoring unit that monitors the cooking state in the cooking device, and the control unit controls the rotation speed of the motor at the first rotation speed and the second rotation speed according to the cooking state monitored by the cooking state monitoring unit .

According to the foregoing, it is possible to provide a range hood that can rotate the filter at a high speed only when necessary by controlling the rotation speed of the motor that rotates the filter in accordance with the cooking state, thereby reducing the chance of noise generation.

In addition, it is also possible to have the following structure as a feature: the range hood further includes a determination unit that determines whether or not oil smoke above a predetermined threshold is generated based on the cooking state monitored by the cooking state monitoring unit, and the control unit is in the determination unit When it is determined that oily smoke greater than a predetermined threshold value has been generated, the electric motor is rotated at the second rotation speed.

According to the foregoing, by rotating the filter at a high speed when oil smoke above a predetermined threshold is generated, the chance of large noise can be reduced.

In addition, the following structure may be used as a feature. That is, after the determining unit determines that oily smoke above a predetermined threshold value is generated, it is determined that the predetermined threshold value is not generated or when oily smoke above the threshold value different from the predetermined threshold value is not generated. , The control unit immediately stops the rotation of the motor, or immediately causes the rotation of the motor to rotate at the first rotation speed, or stops the rotation of the motor after maintaining the second rotation speed for a predetermined time, or after maintaining the second rotation speed for a predetermined time The rotation of the motor rotates at the first rotation speed.

According to the above, the filter is controlled to slow down or stop when the oily smoke above the predetermined threshold is no longer generated, so that the chance of noise generation can be reduced.

In addition, the following structure can also be characterized, that is: the air flow generated by the fan has at least two air volumes, namely a first air volume and a second air volume larger than the first air volume, and the fan generates an air flow of the second air volume. The second rotation speed is faster than the second rotation speed when the fan generates the air flow of the first air volume, and the first rotation speed when the fan generates the air flow of the second air volume is higher than the first rotation speed when the fan generates the air flow of the first air volume quick.

According to the above, when the fan that generates the air flow rotates at a high speed, the noise generated by the filter is submerged. Therefore, in this case, the rotation speed of the filter becomes high and it is difficult to be considered as noise. During high-speed rotation and low-speed rotation, the rotation speed of the filter is correspondingly controlled, thereby reducing the chance of noise generation and maintaining high oil collection efficiency. In addition, the flow rate of oily smoke passing through the filter differs depending on the air volume, so the required filter rotation speed is different. Therefore, the first rotation speed and the second rotation speed can be slowed down when the relative air volume is small, so that it is possible to maintain a high oil collection efficiency and reduce noise caused by the rotation of the filter.

In addition, it is also possible to feature a structure in which the cooking state monitoring unit and the range hood are separate bodies, and wireless communication is performed between the cooking state monitoring unit and the range hood.

According to the foregoing, the cooking state monitoring unit and the range hood are separate bodies and can be arranged in a position suitable for the monitoring object.

As explained above, according to the present invention, it is possible to provide a range hood that can rotate the filter at a high speed only when necessary, thereby reducing the chance of noise generation.

Hereinafter, each embodiment will be described with reference to the drawings.

<First embodiment> The range hood (Range hood) 1 involved in this embodiment will be described with reference to FIGS. 1 to 4. The range hood 1 is installed in the kitchen where the cooker CD is installed, as shown in FIG. Exhaust to the outside, etc. The range hood 1 has a thin hood portion 2 for collecting oily smoke and the like generated by cooking performed below, and the hood portion 2 has an inner surface panel 5 that is concave upward on its inner surface. In addition, the range hood 1 of this embodiment is arranged above the cooker CD, but it may be arranged near the side of the cooker CD.

As shown in FIGS. 2 to 4, the cover portion 2 is connected to the blower box 3 connected to the exhaust duct (not shown) in the vicinity of the communication port 6 of the inner surface panel 5 located behind the upper part. The blower case 3 is located on the back side of the curtain panel 9 and has a fan 4 that is a sirocco fan and generates an air flow D1 inside. Therefore, when the fan 4 is operated, the communication port 6 becomes a negative pressure, and the air below the inner surface panel 5 is sucked in 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 on the upstream side of the air flow than the fan 4.

The range hood 1 includes: a disc-shaped filter 10 having a hole 11 through which the air flow D1 passes at the position of the communication port 6; and a motor that connects a shaft to the center of the disc-shaped filter 10 and rotates the filter 10 20; and the oil collection member 60 installed on the inner surface panel 5 and arranged to surround the outer periphery of the filter 10. Therefore, the range hood 1 is provided with a rotatable filter 10, which exists in the flow path of the air flow D1 generated by the fan 4 on the upstream side of the air flow than the fan 4, and has the function of making the air flow in the view of the figure. Hole 11 through from bottom to top.

In addition, the range hood 1 includes a control unit 30 that controls the rotation of the fan 4 and the motor 20, and an operation unit 70 that receives operation from a user and outputs an operation/stop signal of the range hood 1, etc., to the control unit 30. The control unit 30 is constituted by a conventional microcomputer including a control program that records a method of controlling the rotation of the fan 4 and the motor 20 described later, and the like. The operation unit 70 is constituted by a switch for a user of the range hood 1 to operate, and is arranged on the side surface of the cover 2 on the front side. Of course, it is not limited to this, and it may be configured to receive and output signals from a remote control or cooking device that is separate from the range hood 1. In addition, the operation unit 70 outputs to the control unit 30 not only the operation signal/stop signal of the range hood 1 but also a signal for instructing the change of the rotation speed of the fan 4 and the electric motor 20.

The air below the inner surface panel 5 includes heat generated by cooking, oily smoke, etc., if the fan 4 is operated, the air is drawn to the filter 10 present in the communication port 6, that is, the flow of the air flow D1 generated by the fan 4 The hole 11 of the filter 10 on the upstream side of the fan 4 on the road passes through the hole 11. When receiving an operation signal from the operation unit 70, the control unit 30 rotates the fan 4 to generate an air flow D1, and energizes the electric motor 20 to rotate the filter 10 provided to be rotatable by the electric motor 20. The range hood 1 traps the oil contained in the air in the oil trap member 60 by rotating the filter 10.

The method of capturing oil will be described in detail. Along with heat, oily smoke, etc. generated by cooking performed under the range hood 1, the heated air rises toward the range hood 1 side. If the range hood 1 starts to operate and the fan 4 starts to rotate, the fan 4 generates an air flow. In this way, the air rising to the vicinity of the baffle plate 7 is sucked in from between the baffle plate 7 and the inner surface panel 5, and then is sucked into the fan 4 in the blower box 3 through the hole 11 of the filter 10. And, after that, it is discharged from the blower box 3 to the exhaust duct.

The control unit 30 performs control in such a manner that the range hood 1 rotates the motor 20 that rotates the filter 10 when the range hood 1 rotates the fan 4 that generates an air flow in order to trap oil smoke generated by cooking, etc. . The rotation speed per unit time of the filter 10 also depends on the opening state of the pores of the filter, but it only needs to be at least 230 rpm (Rotation Per Minute) or more. If the filter 10 rotates at a high speed at such a rotation speed, the surface of the filter 10 (the part without the hole 11) drags the air in contact with the surface due to friction, and this movement is also directed to nearby air due to the viscosity of the air. As the air is transmitted, movement of the air is generated near the surface of the filter 10, and the filter 10 performs a rotational movement. Therefore, the movement of the air becomes a vortex shape centered on the shaft of the motor 20.

The swirling air movement occurs on both surfaces of the filter 10, that is, both the lower surface and the upper surface of the filter 10, in other words, on both the upstream and downstream surfaces of the air flow of the filter 10. In this embodiment, the air flow generated by the fan 4 flows through the holes 11 of the filter 10. Therefore, on the downstream side of the filter 10, the motion of the swirling air is taken away from the surface of the filter 10 and is generated toward the filter 10 The spiral flow on the outer peripheral edge of the device 10 is attracted by the fan 4. On the other hand, on the upstream side of the filter 10, the motion of the swirling air forms a high-density air layer that is pressed against the surface of the filter 10 and accompanied by a swirling flow toward the outer periphery of the filter 10.

The oil generated by cooking or the like flows together with the air flow and reaches the vicinity of the surface on the upstream side of the filter 10. As for the oil that reaches the vicinity of the surface on the upstream side, part of the oil (oil with relatively small particle size) is bounced off toward the outer periphery of the filter 10 by the swirling flow of the high-density air layer toward the outer periphery. In addition, The other part (the oil with a relatively large particle size) collides with the surface of the upstream side of the filter 10 (the part without the hole 11) and is bounced 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 to surround the outer periphery of the disc-shaped filter 10. Therefore, for the range hood 1 of the present embodiment, almost no oil is attached to the air flow path downstream of the filter 10, and it is possible to greatly reduce the cleaning/cleaning of the fan 4 and the exhaust at the downstream portion of the filter 10. Trouble with gas pipes, etc.

On the other hand, as the filter 10 rotates, particularly at a high speed, the movement of the air near the surface of the filter 10 becomes faster, and a sound like wind noise is generated. The range hood 1 rotates the filter 10 at a high speed only when necessary, thereby reducing 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 a determination unit 50 that determines whether or not oily smoke above a predetermined threshold is generated based on the cooking state monitored by the cooking state monitoring unit 40 .

In the case of this embodiment, the cooking state monitoring unit 40 is a smoke sensor that is provided at the end of the inner surface panel 5 and detects smoke in the air. The smoke sensor is not particularly limited as long as it can measure the concentration of particles in the air. For example, it may detect the rise from the cooking device CD by irradiating light in the direction of the cooking device CD and measuring the amount of scattered light of the light. The way of the quality concentration of the oil particles contained in the oil fume.

The determination unit 50 determines whether or not oily smoke above a predetermined threshold has been generated based on the cooking state monitored by the smoke sensor of the cooking state monitoring unit 40. The predetermined threshold value can be determined, for example, by obtaining in advance the quality concentration of oil particles contained in oil fume during cooking, such as cooking with oil, fried food, or the like.

The control unit 30 controls the motor 20, which is the filter 10, to rotate at various rotation speeds, and causes the motor 20, which is the filter 10, to rotate at at least two rotation speeds, namely, the first rotation speed and the one that is faster than the first rotation speed. The second rotation speed is controlled by way of rotation. The first rotation speed is a relatively low rotation speed at which sound such as wind noise is hardly generated, and is, for example, about 500 rpm. In addition, the first rotation speed may be slower than the second rotation speed, that is, zero is included. In addition, the second rotation speed is a relatively high-speed rotation speed with relatively loud noises such as wind noise, and is, for example, about 1500 rpm. The more the filter 10 rotates at a high speed, the stronger the swirling air flow and the higher the oil collection efficiency. Therefore, when the concentration of oil particles in the oil fume increases, it is preferable to rotate at a relatively high speed. Therefore, the control unit 30 controls the rotation speed of the motor 20 at a relatively low first rotation speed and a relatively high second rotation speed based on the cooking state monitored by the cooking state monitoring unit 40. In this way, it is possible to provide the range hood 1 that can rotate the filter 10 at a high speed only when necessary by controlling the rotation speed of the motor 20 that rotates the filter 10 according to the cooking state, thereby reducing the chance of noise generation.

More specifically, the judging unit 50 judges whether oily smoke above a predetermined threshold value is generated based on the cooking state monitored by the cooking state monitoring unit 40, and the control unit 30 judges that oily smoke above the predetermined threshold value is generated by the determining unit 50 Next, the motor 20 is rotated at a relatively high second rotation speed. In this way, by rotating the filter 10 at a high speed only when oil smoke above a predetermined threshold value is generated, the chance of large noise can be reduced.

The control method of the control unit 30 will be described with reference to FIG. 5. In addition, S in the flowchart means a step. In S100, the control unit 30 starts the operation of the range hood 1 due to the operation of the operation unit 70 by the user or the like. That is, the control unit 30 rotates the fan 4 to generate an air flow, rotates the filter 10 at a relatively low speed and at a first rotation speed with a low noise level, and causes the smoke sensor of the cooking state monitoring unit 40 to start monitoring the state of oily smoke .

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

In S108, the control unit 30 checks whether a signal to end the operation is received from the operation unit 70 or the like. If the signal is not received, S104 to S108 are repeated to continue the operation. When this signal is received, in S110, the operation of the range hood 1 is ended. That is, the control unit 30 ends the rotation of the fan 4, ends the rotation of the filter 10, and causes the smoke sensor of the cooking state monitoring unit 40 to stop monitoring the state of oily smoke. In this way, the high-speed rotation of the filter that generates large noise is performed only when oil smoke above a predetermined threshold is generated, thereby reducing the chance of generating large noise. In addition, after receiving a signal to end the operation from the operation unit 70 or the like, the indwelling operation may be performed (Japanese means residual transportation). The indwelling operation may be performed by rotating the filter 10 until a constant time has elapsed, or may be performed based on the monitoring result of the cooking state monitoring unit 40.

A modification example (first modification example) of the control method will be described with reference to FIG. 6. In addition, in order to avoid duplication of description, descriptions of the same steps as those in the above-mentioned embodiment are omitted, and the description will be centered on the differences. S200~S210 are the same as S100~S110. In S204, the control unit 30 checks whether the amount of oily smoke generated by the cooking state monitoring unit 40 is a predetermined threshold value or more determined in advance. When the amount of oily smoke generated is greater than or equal to the predetermined threshold value, in S206, the control unit 30 rotates the filter 10 at a relatively high second rotation speed. When the amount of oily smoke generated is less than the predetermined threshold value, 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. In this way, in S200, the control unit 30 temporarily rotates the filter 10 at a relatively low first rotation speed. However, when the amount of oily smoke generated is less than the threshold value, the rotation of the filter 10 may be stopped without generating noise.

A modification example (second modification example) of the control method will be described with reference to FIG. 7. In addition, in order to avoid duplication of description, descriptions of the same steps as those in the above-mentioned embodiment are omitted, and the description will be centered on the differences. S300~S310 are the same as S100~S110. In S304, the control unit 30 checks whether the amount of oily smoke generated by the cooking state monitoring unit 40 is a predetermined threshold value or more determined in advance. When the amount of oily smoke generated is greater than or equal to the predetermined threshold value, in S306, the control unit 30 rotates the filter 10 at a relatively high second rotation speed. When the amount of oily smoke generated is less than the predetermined threshold value, in S312, the control unit 30 rotates the rotation speed of the filter 10 at a relatively low first rotation speed. According to this, even if the amount of soot generation temporarily exceeds the threshold value and the rotation of the filter 10 is controlled at the relatively high second rotation speed, it is possible to return to the relatively low first rotation speed if the generation amount of soot becomes less than the predetermined threshold value. As a result, the chance of large noise can be reduced.

A modification example (third modification example) of the control method will be described with reference to FIG. 8. In addition, in order to avoid duplication of description, descriptions of the same steps as those in the above-mentioned embodiment are omitted, and the description will be centered on the differences. S400~S410 are the same as S100~S110. In S404, the control unit 30 checks whether the amount of oily smoke generated by the cooking state monitoring unit 40 is a predetermined threshold value or more determined in advance. When the amount of oily smoke generated is greater than or equal to the predetermined threshold value, in S406, the control unit 30 rotates the filter 10 at a relatively high second rotation speed. When the amount of oily smoke generated is less than the predetermined threshold value, in S412, the control unit 30 maintains the previous rotation speed for a predetermined time. That is, when the amount of oily smoke generated temporarily exceeds the threshold value and the rotation of the filter 10 is controlled at a relatively high second rotation speed, and then the amount of oily smoke generated becomes smaller than the predetermined threshold value and returns to the relatively low first rotation speed, The second rotation speed, which is relatively high, is temporarily maintained. After that, in S414, the control unit 30 rotates the rotation speed of the filter 10 at a relatively low first rotation speed. In this way, by maintaining the high-speed second rotation speed for a short period of time, it is possible to sufficiently collect oily smoke and the like.

In this way, when the determining unit 50 determines that oil smoke above the predetermined threshold value is generated and then determines that oil smoke above the predetermined threshold value is not generated, the control unit 30 may immediately stop the rotation of the electric motor 20, or immediately cause the electric motor 20 to be activated. After the rotation of the motor 20 is stopped at the first rotation speed with a low noise level, or the second rotation speed is maintained at a high collection efficiency for a predetermined time, the rotation of the motor 20 is stopped, or the rotation of the motor 20 is maintained after the second rotation speed is maintained for a predetermined time. The rotation rotates at the first rotation speed. Accordingly, it is possible to reduce the chance of noise generation by controlling to slow down or stop the filter 10 when no oily smoke above the predetermined threshold is generated anymore.

In addition, in this embodiment, the case where the determination unit 50 determines that oil smoke above the predetermined threshold is generated and then determines that oil smoke above the predetermined threshold is not generated is described. After it is determined that oily smoke greater than or equal to a predetermined threshold has been generated, the subsequent control is performed based on a threshold that is different from the predetermined threshold. That is, if the determination unit 50 determines that oily smoke above a predetermined threshold value has been generated and then determines that oily smoke above a threshold value different from the predetermined threshold value is not generated, the control unit 30 may immediately stop the rotation of the electric motor 20, or immediately The rotation of the motor 20 rotates at the first rotation speed with a low noise level, or stops the rotation of the motor 20 after maintaining the second rotation speed with high collection efficiency for a predetermined time, or the motor 20 is maintained after the second rotation speed is maintained for a predetermined time. The rotation of 20 rotates at the first rotation speed.

In addition, the air volume of the air flow generated by the fan 4 may have at least two air volumes, that is, the first air volume and the second air volume larger than the first air volume. 4 The second rotation speed when the air flow of the first air volume is generated is faster, and the first rotation speed of the fan 4 when the air flow of the second air volume is generated is faster than the first rotation speed of the fan 4 when the air flow of the first air volume is generated. Accordingly, when the fan 4 that generates the air flow rotates at a high speed, the noise generated by the filter 10 is submerged. Therefore, in this case, if the rotation speed of the filter 10 becomes high, it is difficult to be considered as noise. Therefore, by controlling the rotation speed of the filter 10 corresponding 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. In addition, the flow rate of the oily smoke passing through the filter differs depending on the air volume, so the required rotation speed of the filter 10 is different. Therefore, the first rotation speed and the second rotation speed can be slowed when the relative air volume is small, so that it is possible to maintain a high oil collection efficiency and reduce noise caused by the rotation of the filter 10.

<Second embodiment> The range hood 1A according to this embodiment will be described with reference to FIG. 9. In addition, in order to avoid duplication of description, the description of the same structural elements as the above-mentioned embodiment is omitted by attaching the same reference numerals, and the description will be centered on the differences. The range hood 1A is equipped with: a fan 4 that generates an air flow; a filter 10 that is present in the flow path of the air flow on the upstream side of the fan and has a hole through which the air flow passes; a motor 20 that rotates the filter 10; 20. A control unit 30 that controls the rotation of the motor 20 at least at two rotation speeds, namely a first rotation speed and a second rotation speed faster than the first rotation speed; and a control unit 30 that monitors the cooking state in the cooker CD Cooking state monitoring unit 40A.

The cooking state monitoring unit 40A is a pot bottom temperature sensor that detects the temperature of the pot bottom provided in the cooker CD. The pot bottom temperature sensor may be a conventional sensor for cooking appliances, and it has a communication unit that transmits the temperature to the range hood 1A, and the range hood 1A has the temperature of the bottom of the pot received from the communication unit, and This is transmitted to the communication unit (not shown) of the control unit 30. The cooking state monitoring unit 40A transmits such temperature information to the control unit 30 when it is considered that the temperature of the bottom of the pot is significantly higher than 100° C. and cooking is performed using oil. 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 cooker CD exceeds a predetermined temperature and cooking is performed, the high-speed rotation of the filter 10 that generates a large noise can reduce the chance of generating a large noise.

<The third embodiment> The range hood 1B according to this embodiment will be described with reference to FIG. 10. In addition, in order to avoid duplication of description, the description of the same structural elements as the above-mentioned embodiment is omitted by attaching the same reference numerals, and the description will be centered on the differences. The range hood 1B is equipped with: a fan 4 that generates an air flow; a filter 10 existing on the upstream side of the air flow path than the fan and having holes through which the air flow passes; an electric motor 20 that rotates the filter 10; 20. A control unit 30 that controls the rotation of the motor 20 at least at two rotation speeds, namely a first rotation speed and a second rotation speed faster than the first rotation speed; and a control unit 30 that monitors the cooking state in the cooker CD Cooking state monitoring unit 40B.

In the case of this embodiment, the cooking state monitoring unit 40B is a temperature sensor that is provided at the end of the inner surface panel 5 and detects the temperature of the pot and the like on the cooking device CD and the temperature of its contents. The temperature sensor is not particularly limited as long as it is a temperature sensor that measures temperature in a non-contact manner, such as an infrared camera. In addition, in this embodiment, the cooking state monitoring section 40B is used in combination with the cooking state monitoring section 40 of the above-mentioned smoke sensor and the cooking state monitoring section 40A of the pot bottom temperature sensor, and the control section 30 can comprehensively determine these sensing The rotation speed of the filter 10 is controlled by the filter. Of course, the cooking state monitoring unit 40B may be used alone. In this way, when the temperature of the pan of the cooking device CD and the contents thereof exceeds a predetermined temperature and cooking is performed, the filter 10 that generates a large noise is rotated at a high speed, so that the chance of generating a large noise can be reduced.

In addition, in the case of a cooker having a plurality of heating sources, in the case of cooking with a plurality of heating sources, if one of the heating sources exceeds a predetermined temperature, the filter 10 may be rotated at the second rotation speed. Spin. In addition, in the case of a cooker equipped with a grill, the filter 10 may be rotated at the second rotation speed when the grill is used. The use of the grill can be detected by using the temperature sensor installed in the range hood to detect the temperature near the exhaust port of the grill, or the range hood can be used to receive the cooking menu selected by the cooker Information, the operation of igniting the grill and other related cooking signals. It is also possible to use a temperature sensor installed in the range hood to detect the temperature near the grill's exhaust port. If the temperature near the grill's exhaust port exceeds a specified value lower than the specified temperature, it is determined that the grill is used. shelf. This is because the temperature near the grill vent is lower than the temperature inside the grill that is actually heated.

<Fourth embodiment> The range hood 1C according to this embodiment will be described with reference to FIG. 11. In addition, in order to avoid duplication of description, the description of the same structural elements as the above-mentioned embodiment is omitted by attaching the same reference numerals, and the description will be centered on the differences. The range hood 1C is equipped with: a fan 4 that generates an air flow; a filter 10 that is present in the flow path of the air flow on the upstream side of the fan and has a hole through which the air flow passes; a motor 20 that rotates the filter 10; 20. A control unit 30 that controls the rotation of the motor 20 at least at two rotation speeds, namely a first rotation speed and a second rotation speed faster than the first rotation speed; and a control unit 30 that monitors the cooking state in the cooker CD Cooking state monitoring unit 40C.

In the case of this embodiment, the cooking state monitoring unit 40C is a sound sensor that is installed on the wall surface between the range hood 1C and the cooker CD, and collects the sound of cooking on the cooker CD. In order to better collect the sound of cooking performed on the cooker CD, the cooking state monitoring unit 40C is a separate body from the range hood 1C, and wirelessly communicates with the control unit 30. It is preferable that the sound sensor has directivity with respect to the pot on the cooking device CD, and collects its frequency and magnitude, and analyzes what kind of cooking is performed.

For example, the cooking state monitoring unit 40C recognizes the sound of using oil to fry food or stir-fry, the sound of cooking food, and the sound of boiling water, and in the case of the former sound, transmits such temperature information 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, by performing high-speed rotation of the filter 10 that generates large noises according to the state and attributes of the sound generated on the cooking device CD, the chance of generating large noises can be reduced. Moreover, the cooking state monitoring part 40C and the range hood 1C are separate bodies, and can be arrange|positioned at the position suitable for a monitoring object.

In addition, in this embodiment, the cooking state monitoring unit 40C is used in combination with the cooking state monitoring unit 40A of the aforementioned pot bottom temperature sensor, and the control unit 30 can comprehensively determine these sensors and control the rotation speed of the filter 10. The control unit 30 may also, for example, even if the sound sensor of the cooking state monitoring unit 40C detects that the sound of fried food is produced, but the bottom temperature sensor of the cooking state monitoring unit 40A detects that the temperature is below 100°C, The first rotation speed control filter 10 is relatively low speed and low noise level. Of course, the cooking state monitoring unit 40C may be used alone.

In addition, the present invention is not limited to the illustrated embodiments, and can be implemented with a structure that does not deviate from the scope of the content described in each of the claims. That is, the present invention is particularly illustrated and described mainly about specific embodiments, but those skilled in the art can, without departing from the scope of the technical idea and purpose of the present invention, in terms of number and applications relative to the above-mentioned embodiments Examples and other detailed structures are subject to various deformations.

For example, the cooking state monitoring unit may be based on a temperature sensor that detects the temperature of the substance placed on the cooking device CD, a color sensor that detects the color of the substance placed on the cooking device CD, and The sound sensor that detects the sound generated by the substance in the cooking device CD, the particle sensor that detects the particles existing in the space between the cooking device CD and the range hood, and the cooking selected by the cooking device Any one of the function table information and the operating state of the cooker is detected by the operating state sensor of the cooker or the information of a combination of them to monitor the cooking state.

In addition, the present invention is not limited to a range hood, as long as it is a device that uses a cooker to trap the oily smoke generated from the cooking, and may be, for example, a lighting fixture with an air cleaner.

1. 1A, 1B, 1C: Range hood 2: Cover 3: Blower case 4: Fan 5: Inner surface panel 6: Connecting port 7: Rectifier 9: Curtain board 10: Filter 11: Hole 20: Motor 30 : Control part 40, 40A, 40B, 40C: Cooking state monitoring part 50: Judging part 60: Oil trapping part 70: Operation part D1: Air flow direction CD: Cooker S100~S110, S200~S212, S300~S312 , S400~S414: steps

Fig. 1 is a diagram of a case where the range hood according to the first embodiment of the present invention is installed in a kitchen, Fig. 1(A) is a front view, and Fig. 1(B) is a side view.

Fig. 2 is a diagram of the range hood according to the first embodiment of the present invention, Fig. 2(A) is a bottom view, and Fig. 2(B) is a bottom view with the rectifier plate removed.

Fig. 3 is a cross-sectional view of the I-I section of Fig. 2 of the range hood of the first embodiment of the present invention.

Fig. 4 is a diagram of the range hood of the first embodiment of the present invention, Fig. 4(A) is a perspective view, and Fig. 4(B) is an enlarged perspective view.

Fig. 5 is a flowchart showing the control method of the range hood according to the first embodiment of the present invention.

Fig. 6 is a flowchart showing a control method of the range hood according to a first modification of the first embodiment of the present invention.

Fig. 7 is a flowchart showing a control method of the range hood according to a second modification of the first embodiment of the present invention.

Fig. 8 is a flowchart showing a control method of the range hood according to a third modification of the first embodiment of the present invention.

Fig. 9 is a diagram of a case where the range hood according to the second embodiment of the present invention is installed in a kitchen, Fig. 9(A) is a front view, and Fig. 9(B) is a side view.

Fig. 10 is a diagram of a case where the range hood according to the third embodiment of the present invention is installed in a kitchen, Fig. 10(A) is a front view, and Fig. 10(B) is a side view.

Fig. 11 is a diagram of a case where the range hood of the fourth embodiment of the present invention is installed in a kitchen, Fig. 11(A) is a front view, and Fig. 11(B) is a side view.

1: Range hood

2: Hood

3: Blower case

4: fan

5: inner surface panel

6: Connecting port

9: Curtain board

10: filter

20: electric motor

30: Control Department

40: Cooking State Monitoring Department

50: Judgment Department

60: Oil trapping parts

70: Operation Department

D1: The direction of air flow

Claims (2)

A range hood, which is installed above or near the cooking device, and is provided with: Fan, which generates air flow; A filter, which is located on the upstream side of the fan in the flow path of the air flow, and has holes through which the air flow passes; An electric motor that rotates the filter; and The control unit, based on the information from the cooking state monitoring unit that monitors the cooking state in the cooker, causes the motor to rotate at at least two rotation speeds, namely a first rotation speed and a second rotation speed faster than the first rotation speed. The rotation speed rotation method controls the rotation of the motor, The control unit controls the rotation speed of the electric motor at the first rotation speed and the second rotation speed independently of the rotation control of the fan. The range hood according to claim 1, wherein: The cooking state monitoring unit includes any one of a smoke sensor, a pot bottom temperature sensor, a temperature sensor, a sound sensor, a color sensor, a cooking device operating state sensor, a particle sensor, or A variety of sensors.

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