WO2013099929A1

WO2013099929A1 - Range hood

Info

Publication number: WO2013099929A1
Application number: PCT/JP2012/083623
Authority: WO
Inventors: 崇義藤原; 友佐々木
Original assignee: 富士工業株式会社
Priority date: 2011-12-28
Filing date: 2012-12-26
Publication date: 2013-07-04
Also published as: MY162040A; CN103185359A; SG11201403673RA; JP5684106B2; JP2013139945A; HK1183934A1; CN103185359B; TW201344121A; TWI544186B

Abstract

A range hood with minimal pressure loss and good oil collecting efficiency is provided. The range hood (1) is provided with: a fan (60) that generates a flow of air; a filter (10) that exists on the flow path of the flow of air and is upstream from the fan (60), and has holes that allow the flow of air to pass through; an electric motor (20) that rotates the filter (10); an oil collecting member (30) that surrounds the periphery of the filter; and a control unit (90) that controls the rotation of the fan (60) and the electric motor (20). The control unit (90) sometimes allows the fan (60) and the electric motor (20) to simultaneously rotate.

Description

Range food

The present invention relates to a range hood for collecting oil from oil smoke generated by cooking, and more particularly to a range hood.

The range hood installed in the kitchen etc. sucks the steam and oil smoke etc. generated by the cooking performed under the range hood with the flow of air generated by the fan, and the oil smoke etc. to the outdoors etc. with the sucked air And discharge. However, discharging the oil contained in the oil smoke as it is is not preferable from the environment, and the oil is attached to equipment such as a fan or a duct that is usually present downstream of the range hood in the air flow path. It takes a lot of labor / expense for maintenance of the equipment, and promotes the deterioration of the equipment.

Therefore, it is necessary for the range hood to be equipped with a filter having high collection efficiency to capture and recover a large amount of oil contained in oil smoke, but conversely, the oil adhering to the filter is a filter Clogged up, increase ventilation resistance, promote collection efficiency drop, cause poor ventilation and eventually force the user to frequently clean and clean the filter, requiring a lot of labor and time. Become. Therefore, many attempts have been made to improve the cleanability of the filter.

For example, in the technology disclosed in Patent Document 1, a large amount of washing water is used by providing a filter for collecting oil smoke during cooking and a brush (dirt wiping means) moving while in contact with the surface of the filter. There is disclosed a range hood with a filter cleaning function that can remove dirt attached to the filter.

Although such a range hood reduces the time and effort for the user to clean the filter, the brush, a motor for driving the brush, a tank for washing water, a spray nozzle, etc. are required, and the structure of the range hood itself becomes complicated on a large scale The cost also increases. In the first place, this range hood has not presented a technology for improving the oil collection efficiency in the filter.

There is a technique disclosed in Patent Document 2 as a device for increasing the oil recovery rate by a filter as well as preventing clogging of the filter and reducing the time for cleaning. In this document, a rotatable disk having a blade and having a substantially disk shape is provided on the front side of a rotary blade for exhaust to remove oil in exhaust gas, and exhaust gas flowing through the filter is exhausted. There is disclosed a range hood which is provided with a passage portion for guiding oil in exhaust gas to the inner surface while being guided to the rotary blades for the purpose and extending from the filter to the rotary blades for exhaustion.

Such a range hood also does not require the large-scale complicated structure as in Patent Document 1, but the oil adhering to the filter while the range hood is in operation can not be operated (while the range hood is stopped) The same is true in that it is the one to be removed. In addition, although the time and effort for cleaning the filter by the user can be reduced to some extent, a large amount of oil is scattered in the passage provided between the filter and the exhaust blade, that is, the downstream portion of the filter. It can not be said that the time and effort required to clean the downstream portion of the filter, which is extremely time-consuming when cleaning the hood, is reduced.

Unexamined-Japanese-Patent No. 2006-292248 JP, 2006-38240, A

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is a filter which is far above the conventional oil collection efficiency and has a small pressure loss, and which is hard to clog. To provide a range hood which reduces the adhesion and adhesion of oil to the filter and reduces the time for cleaning / cleaning the filter.
Furthermore, the present invention is to provide a range hood that operates the filter but reduces the influence of the sound of the power source of the operation on the user.

As a result of intensive studies to solve the above problems, the inventor has found that high oil collection efficiency can be obtained with a small pressure loss by operating the filter while operating the fan of the range hood. It has been found that the control of the power source for moving the object can reduce the influence of the sound generated from the power source etc. on the user, and the present invention has been completed.

In order to solve the above problems, a fan for generating an air flow, a filter having a hole which is present on the flow path of the air flow and upstream of the fan and allows the air flow to pass therethrough, A motor for rotating the filter, an oil collection member surrounding the periphery of the filter, and a control unit for controlling the rotation of the fan and the motor, the control unit rotating the fan and the motor simultaneously A range hood is provided which is characterized in that
According to this, by rotating the filter at the same time as the fan, the noise generated by the motor for rotating the filter and the wind noise due to the rotation of the filter can be made as small as the user does not mind. In addition, by simultaneously performing both the rotation of the fan, that is, the operation of the range hood and the rotation of the filter at least at one time, the amount of oil adhering to the filter is reduced, and oil sticking on the filter surface is prevented. Can.

Furthermore, the control unit simultaneously starts the rotation of the fan and the rotation of the motor and / or ends the rotation of the fan and the rotation of the motor. May be controlled to be simultaneous.
According to this, it is possible to provide the range hood in which the user is not anxious about the generation of the motor noise by simultaneously starting and stopping the rotation of the motor, which is a power source for moving the filter, and the rotation of the fan. .

Furthermore, the control unit controls so that the time to start the rotation of the fan and the time to start the rotation of the motor are simultaneous, and the rotation of the motor is performed after a predetermined time has elapsed after the rotation of the fan is completed. It may be characterized by controlling to end.
According to this, by rotating the filter for a while after the end of the range hood operation, it is possible to fly away the oil adhering to the filter and maintain the filter in a clean state, as a result, to the filter It is possible to provide a range hood which reduces the adhesion and adhesion of oil and reduces the time for cleaning / cleaning the filter. Furthermore, if oil remains attached to the filter after the end of the range hood operation, the oil will stick and cause the filter to be clogged or unbalance, and the next time the operation is started, wasteful noise is generated. However, such noise can be prevented.

Furthermore, the control unit is at a different point in time when the rotation of the fan is started and the rotation of the motor is different, and when the rotation of the fan is ended and the rotation of the motor is ended. Control may be performed so as to be at different points in time.
According to this, flexible control is possible by independently rotating the fan and the filter.

Furthermore, the control unit may change the rotational speed of the fan and change the rotational speed of the motor according to the rotational speed of the fan.
According to this, when a large amount of oil adheres, a stronger centrifugal force is applied to quickly discharge the oil from the filter to prevent the clogging of the filter, reduce the amount of the adhered oil, and the rotation speed of the range hood When it is slow, it is possible to prevent the filter from rotating at high speed more than necessary.

Furthermore, the control unit may be characterized in that the rotational speed of the fan and the motor is changed stepwise.
According to this, it is possible to control the number of rotations that can be easily understood by the user, such as strong, medium, and weak.

In order to solve the above problems, a fan for generating an air flow, and a filter having a hole which is on the flow path of the air and upstream of the fan and allows the air flow to pass An electric motor for rotating the filter; an oil collection member surrounding the periphery of the filter; and a control unit capable of changing the rotational speed of the motor and the fan in stages. A range hood is provided, characterized in that the motor is not rotated at the stage where the number of revolutions of the fan is the smallest.
According to this, when the noise accompanying the rotation of the filter is noticeable, the quiet range hood can be provided by not rotating the filter.

Furthermore, the control unit may be characterized in that, when the rotation is finished after the fan rotates only at the stage where the rotational speed of the fan is the smallest, the motor rotates the motor when the rotation of the fan ends.
According to this, after the operation of the range hood, for example, when the user leaves the vicinity of the cooking table, the oil attached can be blown away by rotating the filter immediately, and the oil can be quickly taken off from the filter to In addition to preventing clogging and reducing the amount of adhesion of oil, it is possible to provide a range hood in which noise is not annoyed to users away from the range hood.

Furthermore, a filter rotation control switch may be provided to control the rotation of the motor.
According to this, the user can control the rotation of the flexible filter by himself.

As described above, according to the present invention, the filter is a filter which has a large pressure loss and far exceeds the conventional oil collection efficiency, and is provided with a filter that is hard to clog, and lessens adhesion and adhesion of oil to the filter. A range hood can be provided which reduces the effort of cleaning / cleaning the filter.
Furthermore, according to the present invention, it is possible to provide a range hood which reduces the influence of the sound of the power source of the operation of the filter on the user.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of 1st Example of the range hood which concerns on this invention. The perspective view seen from the lower part of the 1st example of the cooker hood concerning the present invention (The state where the straightening vane was removed is shown). BRIEF DESCRIPTION OF THE DRAWINGS The front view (A) which shows the filter in 1st Example of the range hood which concerns on this invention, and its peripheral part (A), a side view (B), a top view (C), a bottom view (D), sectional drawing (E). The expanded sectional view which shows the filter in 1st Example of the range hood which concerns on this invention, and its peripheral part (The position of a cross section is the same position as FIG.3 (E)). Operation | movement explanatory drawing in the 1st Example of the range hood which concerns on this invention. The effect | action description enlarged view in the 1st Example of the range hood which concerns on this invention. Explanatory drawing which shows the modification of the control method of 1st Example of the range hood which concerns on this invention. The test block diagram used for the test for obtaining the relationship between the collection rate in a filter, and the oil adhesion to downstream components in the first embodiment of the range hood according to the present invention and the prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment
FIG. 1 shows a range hood 1 according to a first embodiment of the present invention. The range hood 1 has a thin hood portion 80 having an inwardly concave inner surface panel 81 on the inner surface for collecting steam, oil smoke and the like generated by cooking performed at the lower side. The hood portion 80 is connected to a fan box 82 connected to the exhaust duct D near the hood opening 2 located substantially at the center of the hood portion 80. The fan box 82 internally includes a fan casing 61, and the fan casing 61 internally includes a fan 60 that is a sirocco fan and generates an air flow. The suction port 62 of the fan 60 is disposed to be located at the hood opening 2 of the hood portion 80. Therefore, when the fan 60 is operated, the hood opening 2 is under negative pressure, and the air below the inner surface panel 81 is sucked through the hood opening 2 and discharged to the outside through the exhaust duct D. That is, the hood opening 2 is located upstream of the fan 60 on the flow path of the air flow generated by the fan 60.

A mounting plate 50 is attached to the hood opening 2 so as not to create a gap that can be a flow path of air between the hood opening 2 and the inner panel 81, a disk-like filter 10 having a hole for passing the flow of air, and a filter A rotary shaft is connected to the center of the 10 disks, and a motor 20 for rotating the filter 10, a motor mount 40 for mounting the motor 20 on the mounting plate 50, and a mounting plate 50 are provided. There is a surrounding oil collecting member 30. Therefore, the range hood 1 is on the flow path of the air flow generated by the fan 60, and exists on the upstream side of the flow from the fan 60, and the hole for passing the air flow from the bottom to the top in the figure The filter 10 is rotatably provided.

The hood unit 80 also includes a control unit 90 that controls the rotation of the motor 20 that rotates the filter 10 and the rotation of the fan 60. In the present embodiment, the control unit 90 is provided in the hood unit 80, but is not limited to this. The control unit 90 may be provided in any of the range hood 1, and may be provided outside the range hood 1. . The control unit 90 performs control such that the fan 60 and the motor 20 may be simultaneously rotated. That is, the control unit 90 controls the motor 20 to rotate at least at one time while the range hood 1 rotates the fan 60 that generates a flow of air to collect oil smoke and the like generated by cooking. Do. Specifically, rotating the fan 60 and the motor 20 (the filter 10) means to energize the fan 60 and the motor 20, and not rotating the fan 60 or the motor 20 means to cancel the energization.

The air below the inner surface panel 81 contains steam, oil smoke, etc. generated by cooking, and when the fan 60 operates, it is present in the hood opening 2, that is, on the flow path of the air flow generated by the fan 60. The air is sucked into the hole of the filter 10 located upstream of the fan 60 and passes through the hole. The filter 10 is rotatably provided by the motor 20. When the range hood 1 is operated, the fan 60 generates a flow of air and the motor 20 rotates the filter 10. The range hood 1 collects the oil contained in the air on the oil collecting member 30 by rotating the filter 10. The method of collection will be described later.

The range hood 1 has a pressure loss smaller than that of a conventional slot filter, HEPA filter, etc., in which the oil collection efficiency is improved by making slits or eyes finer, or superposing them into multiple layers. In the state, it can have high oil collection efficiency. That is, when the oil collection efficiency is improved by making the slits of the slit fine or superposing and double layering using a conventional slot filter, HEPA filter, etc., the air vent of the filter forms a complicated flow path In the case of such a range hood 1, the oil collection efficiency is enhanced by the rotation of the filter, so it is not necessary to form such a complicated flow path. Therefore, high oil collection efficiency can be obtained while maintaining low air flow resistance as compared with the conventional filter. In addition, less oil adheres to the filter to cause clogging, so that the labor for cleaning the filter itself can be reduced and pressure loss can be prevented from increasing as it is used. Since almost no oil adheres to the downstream part, it is possible to provide a range hood which greatly reduces the time for cleaning / cleaning the downstream part from the filter.

The type of fan 60 is not particularly limited, and may be another fan such as an axial fan that generates an air flow. Preferably, it is a high static pressure sirocco fan used in this embodiment. Further, below the hood portion 80, there is provided a straightening vane 70 which is detachable from the hood portion 80 and which has a gap between the hood portion 80 to increase suction force. Although the range hood 1 in the present embodiment includes the straightening vane 70, the presence of the straightening vane 70 is not particularly limited, and may or may not be present. When there is no flow straightening plate or when the flow straightening plate is removed, as shown in FIG. The mounting plate 50, the disk-like filter 10, and the oil collection member 30 mounted on the mounting plate 50 and provided so as to surround the outer peripheral edge of the filter 10 can be directly viewed by the user.

FIG. 2 shows a filter rotation control switch 91 that controls the rotation of the motor 20. As described later, the control unit 90 performs various controls on the motor 20 for rotating the filter 10. In addition to this, the user operates the filter rotation control switch 91 to make the user flexible. Filter rotation can be controlled. The filter rotation control switch 91 can start the rotation of the motor 20, end the rotation, change the rotation speed, and the like by the operation of the user. Further, as a maintenance operation of the filter 10, an operation of automatically stopping only after the motor 20 is rotated for a predetermined time can be performed.

Further, in the present embodiment, the filter 10 is formed of a disc-shaped thin plate, but is not limited thereto. For example, the filter may be cylindrical. In this case, the cylindrical filter has a hole that allows the flow of air to pass through the side surface of the cylinder by rotating the cylinder by connecting the rotary shaft of the motor to the central axis of the cylinder. A flow of air is configured to pass from the outside to the inside of the side of the barrel. Further, the oil collection member is provided so as to surround the side surface of the cylinder. The tube may be placed horizontally or vertically. When the cylinder is placed horizontally, the oil collection member is provided with a downwardly open opening for sucking air and an open opening for flowing air to the fan side. When the cylinder is vertically disposed, the filter does not open at the bottom of the cylinder in order to suck the air flow from the side of the cylinder, and the oil collection member is provided so as to surround the entire side of the filter. Since it has a simple structure and can provide a thin range hood, it is preferable to use a disk-like filter as in this embodiment and a thin plate.

Further, in the present embodiment, portions other than the holes in the surface on both sides of the filter 10 are smooth surfaces that are flat and smooth without projections and irregularities, but the present invention is not limited to this and a general slot filter There may be protrusions such as cut and raised along with slits (holes) as in FIG. If the filter has a smooth surface as in this embodiment, the air flow resistance of the air flow in the filter is further reduced, and furthermore, the rotational resistance of the filter is also reduced, so the motor for rotating the filter has a small torque. Things will be enough. In addition, since there is no protrusion such as cut and raised on the filter, it is possible to provide a range hood with less noise for cutting air. Also, these make it easy to rotate the filter at high speed. In addition, most of the oil is collected on the surface of the filter, and the oil is hardly collected on the side of the filter pores, so that the filter pores are less likely to be clogged with oil, and cut and raised etc. Since there are no protrusions, the filter itself can be easily cleaned and cleaned.

3 and 4 show the filter 10 of the range hood 1 and its periphery (hereinafter referred to as a filter unit). The filter unit 3 has a mounting plate 50 attached to the hood opening 2, a disk-like filter 10 having a hole for passing the flow of air, and a rotational axis connected to the center of the disk of the filter 10 to rotate the filter 10. The motor 20 includes a motor 20 for mounting the motor 20 on the mounting plate 50, and an oil content collecting member 30 mounted on the mounting plate 50 and surrounding the filter 10.

The mounting plate 50 is a substantially square flat plate provided with a circular mounting plate opening 51 at the center. In this embodiment, although the periphery of the flat plate is curved upward with a curvature, it is not limited to this, and it may be attached to the hood opening 2 of the inner surface panel 81. The attachment of the mounting plate 50 and the hood opening 2 is made without a gap or the like, and the flow of air does not pass through the attachment portion. Accordingly, the mounting plate opening 51 is the only part that allows the flow of air generated by the fan 60 to pass through, and the mounting plate opening 51 becomes a flow path of the flow of air generated by the fan 60.

The motor attachment 40 is provided on the downstream side of the air flow of the mounting plate 50 so as to straddle the mounting plate opening 51. The motor attachment 40 has a hole 41 for passing the rotation shaft 21 of the motor 20 substantially at the center, and also has a margin portion for easy attachment to the attachment plate 50. The motor attachment 40 is attached to the mounting plate 50 such that the hole 41 is at the center of the mounting plate opening 51 in plan view.

The motor 20 is fixed to the motor attachment 40 by penetrating the rotary shaft of the motor attachment 40 in the hole 41 of the motor attachment 40 from the top to the bottom (from the downstream side of the air flow toward the upstream). Ru. The rotating shaft 21 of the motor 20 is the center of the mounting plate opening 51 which is circular in plan view.

The filter 10 is detachably attached to the end portion of the rotation shaft 21 of the motor 20 so that the surface of the filter 10 is perpendicular to the rotation shaft 21. The outer shape of the filter 10 is circular, and the filter 10 is attached to the rotary shaft 21 of the motor 20 located at the center of the circular mounting plate opening 51 at the center of the filter 10, so the outer shape of the filter 10 and the mounting plate opening The outer shape of the portion 51 is a circle of concentric circles. In this embodiment, the diameter of the filter 10 is larger than the diameter of the mounting plate opening 51 because the mounting plate opening 51 has the extending portion 52. The extending portion 52 extends inward from the inner wall of the oil content collecting member 30, that is, the rotation shaft side of the electric motor 20 at the upstream end of the oil content collecting member 30. The extension portion 52 is preferable because it can increase the ratio of collecting oil that has passed through the holes, and provide a range hood with high oil collection efficiency.

The position of the filter 10 in a front view is below the lower surface of the mounting plate 50, that is, on the upstream side of the air flow. Therefore, the oil collection member 30 is attached to the mounting plate 50 so as to surround the outer peripheral edge of the filter 10. The distance between the outer peripheral edge of the filter 10 and the inner wall of the oil collection member 30 needs to be larger than 0 because the two do not contact each other, but it is preferable that the distance be as small as possible so that the oil does not leak. In the present embodiment, it is about 2.5 mm. The oil collecting member 30 is provided with an oil reservoir 31 at the lower end. The oil reservoir 31 is a place where the oil that has hit the upstream surface of the filter 10 and bounced off contacts the inner wall of the oil collection member 30, and the oil is stored.

Although the height of the range hood 1 is the height of the hood portion 80 and the height of the fan box 82, the height of the fan box 82 is substantially defined from the height of the fan 60, and the height of the hood portion 80 is From the sum of the height from the upper end of the motor 20 to the lower end of the oil collection member 30, ie, the height of the filter unit 3, and the depth (height) of the recess of the inner panel 81 for capturing air containing oil etc. It is prescribed. In order to capture air containing oil etc., it is necessary to reduce the height of the filter unit 3 since the depth (height) of the recess is required to a certain extent, thereby lowering the overall height of the range hood 1 It becomes important to provide a thin range hood. In the present embodiment, the filter unit 3 is preferably thin because the filter 10 is formed of a thin plate having a disk shape.

FIG. 5 and FIG. 6 illustrate the action of collecting oil in the range hood 1 accompanying the flow of air. FIG. 5 shows the action of the air flow across the range hood 1. The heated air A rises up toward the range hood 1 together with the steam and oil smoke generated by the cooking performed under the range hood 1. When the range hood 1 starts operation and the fan 60 starts to rotate, the fan 60 generates an air flow from the bottom to the top in the figure. Then, the air rising around the straightening vane 70 is sucked from between the straightening vane 70 and the inner surface panel 81, and then passes through the hole 11 of the filter 10 and is sucked into the suction port 62 of the fan 60 in the fan casing 61. Ru. After that, the air is discharged from the fan box 82 to the exhaust duct D.

The number of revolutions per unit time of the filter 10 may be at least 230 rpm (Rotation Per Minute), although it depends on the opening state of the pores of the filter. When the filter 10 rotates at a relatively high speed, the surface of the filter 10 (the portion without the holes 11) drags the air in contact with the surface by the frictional force, and the viscosity of the air transfers its movement to the nearby air, The movement of air occurs near the surface of the filter 10, and the movement of the air becomes a vortex around the rotation axis because the filter 10 is rotating.

This swirling air movement occurs on both sides of the filter 10, ie, both the lower and upper surfaces of the filter 10, in other words, both the upstream and downstream surfaces of the air flow A of the filter 10. In the present embodiment, since the air flow A generated by the fan 60 flows from the bottom to the top in the figure through the holes 11 of the filter 10, the movement of the vortex-like air on the downstream side of the filter 10 While being pulled away from the surface of the filter 10, a spiral flow is generated toward the outer peripheral edge of the filter 10 and is drawn from the suction port 62 by the fan 60. On the other hand, on the upstream side of the filter 10, the movement of the swirling air is pressed against the surface of the filter 10, and a dense air layer with a swirling flow toward the outer peripheral edge of the filter 10 is formed.

FIG. 6 shows the action of the air flow in the filter unit 3. The oil OP1 generated by cooking or the like is made to flow along with the air flow A and reaches near the upstream surface of the filter 10. The oil portion OP2 that has reached the vicinity of the upstream surface is partly due to the swirling flow toward the outer periphery of the dense air layer, and the other portion (oil portion having the large particle diameter) is due By colliding with the surface (part without holes 11) on the upstream side of the filter 10, it is repelled in the direction of the outer peripheral edge of the filter 10. As a result, the oil component collecting member 30 provided so as to surround the outer peripheral edge of the disk-shaped filter 10 is collected as the oil component OP3 and collected in the oil reservoir 31 as the oil OL.

The oil, which has become very fine particles, passes through the holes of the filter 10 together with the air flow A, but a portion of the oil is downstream of the extension portion 52 or the filter 10 of the oil collection member 30. Can collide with the inner wall of the Although some of the oil that could not be finally collected adheres to the fan 60 and the exhaust duct D, etc. located downstream of this, most of the oil that has become fine particles that has passed through the holes of the filter 10 As it is, the air flow A is carried and exhausted to the outside through the exhaust duct D. Therefore, the range hood 1 of the present embodiment according to the present invention cleans / cleans the fan 60, the exhaust duct D, etc. in the downstream portion from the filter 10 with little oil adhering to the downstream portion in the air flow path from the filter 10. It is possible to significantly reduce the time and effort.

When the oil collides with the surface on the upstream side of the filter (the portion without the holes 11), most of the oil is repelled in the direction of the outer periphery of the filter, but some may adhere to the surface. As the rotational speed of the filter increases, the oil once attached to the filter surface is blown away by the centrifugal force toward the outer peripheral direction. As a result, the range hood according to the present invention can reduce the labor for cleaning the filter itself by reducing the adhesion and retention of oil on the filter.

The control unit 90 performs control such that the fan 60 and the motor 20 may be simultaneously rotated. That is, the control unit 90 controls the motor 20 to rotate at least at one time while the range hood 1 rotates the fan 60 that generates a flow of air to collect oil smoke and the like generated by cooking. Do. In other words, the control unit 90 may cause the motor 20 to rotate the filter 10 when the fan 60 is rotating to generate a flow of air. Further, the control unit 90 may perform control such that when the filter 10 is rotated by the electric motor 20, the fan 60 may be rotated to generate a flow of air.

According to this, by rotating the filter 10 at the same time as the fan 60, the noise generated by the motor 20 for rotating the filter 10 and the wind noise due to the rotation of the filter are set to a level that the user does not notice be able to. That is, when the filter is stopped while the filter is rotating, there is no noise generated by the fan, so the noise generated by the motor and the wind noise due to the rotation of the filter are noticeable. Since noise generated by the motor and wind noise generated by the rotation of the filter are wiped out by the noise generated by the fan, the user can be made not to be bothered. Further, by simultaneously performing both the rotation of the fan 60, that is, the operation of the range hood 1 and the rotation of the filter 10 at least one time simultaneously, the amount of oil adhering to the filter 10 is reduced, and the oil is fixed on the filter surface. Can be prevented.

FIG. 7 is an explanatory view showing a modification of the control method for the fan 60 and the motor 20 of this embodiment. The time when the fan 60 and the motor 20 are rotating is indicated by ON (solid line), and the time when the motor 60 is not rotating is indicated by OFF (dotted line). In the modification 0 of the rotation of the filter, the control unit 90 performs control so that the fan 60 and the motor 20 may be simultaneously rotated as described above. In the present modification, the motor 20 (filter 10) is rotating somewhere in rotation of the fan 60. The rotation of the fan 60 may be performed anywhere, and the rotation time is not particularly limited.

FIG. 7 shows a conventional range hood as a conventional example. In the conventional example, oil attached to the filter while the range hood is operating, that is, while the fan is rotating, is removed while the range hood is not operating (that is, when the fan is not rotating). Because it is intended to be used, the function of removing oil is turned on after the fan is turned on. Therefore, performing control so that the present invention may rotate the fan 60 and the motor 20 simultaneously is totally different from the conventional example.

In the first modification of the filter rotation, the control unit 90 rotates the fan 60 while dividing one OFF into two ON periods, that is, two rotation periods while the fan 60 is rotating. In this modification, although it divides into two rotation periods, it is not limited to this, ON and OFF may be repeated many times, while fan 60 is rotating. According to this, it is possible to reduce the adhesion amount of oil to the filter and to minimize the noise generated by the motor and the wind noise due to the rotation of the filter.

In the second modification of the filter rotation, the control unit 90 always rotates the motor 20 (filter 10) while the fan 60 is rotating. That is, the control unit 90 simultaneously starts the rotation of the fan 60 and the rotation of the motor 20, and simultaneously ends the rotation of the fan 60 and the rotation of the motor 20. Control to be. Furthermore, the control unit 90 simultaneously starts the rotation of the fan 60 and the rotation of the motor 20, or simultaneously ends the rotation of the fan 60 and the rotation of the motor 20 simultaneously. It may be controlled to be According to this, by simultaneously performing the start and end of the rotation of the motor 20, which is a power source for moving the filter 10, and the rotation of the fan 60, a range hood in which the user is not anxious about noise generation of the motor 20 is provided. can do.

Of course, as in the fifth modification, the control unit 90 simultaneously starts the rotation of the fan 60 and the rotation of the motor 20 at the same time, and ends the rotation of the fan 60 and the motor 20. Control may be performed so that the rotation ends simultaneously, and the rotation of the motor 20 may be interrupted while the fan 60 is rotating.

In the third modification of the rotation of the filter, the control unit 90 performs control such that the time to start the rotation of the fan 60 and the time to start the rotation of the motor 20 are simultaneous, and a predetermined time after the end of the rotation of the fan 60 It controls to complete | finish rotation of the electric motor 20 after progress. That is, the rotation of the fan 60 is the same as in the second modification, but the motor 20 (filter 10) continues to rotate for a while even after the rotation of the fan 60 is completed. According to this, after the end of rotation of the fan 60, oil adhering to the filter 10 can be blown away, and the filter 10 can be maintained in a clean state. As a result, adhesion of oil to the filter 10 A range hood can be provided that reduces sticking and reduces the effort of cleaning / cleaning the filter 10. Furthermore, if oil remains attached to the filter 10 after the end of the range hood operation, the oil adheres and causes clogging or unbalance in the filter 10, causing unnecessary noise when the operation is started next time. As a result, such noise can be prevented. A predetermined time may be appropriately determined as to how long the control unit 90 rotates after completion of the rotation of the fan 60. For example, when the strong operation of the fan is long, the long operation is long. You may make it shorter.

Of course, as in the sixth modification, the control unit 90 controls so that the time to start the rotation of the fan 60 and the time to start the rotation of the electric motor 20 are simultaneous, and a predetermined time after the end of the rotation of the fan 60 The rotation of the motor 20 may be controlled to end after the lapse, and the rotation of the motor 20 may be interrupted while the fan 60 is rotating.

In the fourth modification of the rotation of the filter, the control unit 90 starts the rotation of the motor 20 before the rotation of the fan 60, resumes the rotation again after a temporary interruption during the rotation of the fan 60, and then after the rotation of the fan 60 ends. It controls so that rotation of electric motor 20 may be ended after predetermined time progress. According to this, by rotating the filter 10 at a high speed just before the rotation of the fan 60, the oil remaining in the filter in the previous use is blown away and the oil is collected by the clean filter without clogging. Can. In this case, since the fan 60 starts to rotate slightly after turning on the range hood, the filter 10 can be rotated in a short time immediately before the fan 60 rotates. As described above, the control unit 90 is at a different time when the rotation of the fan 60 starts and the rotation of the motor 20 starts, and when the rotation of the fan 60 ends and the rotation of the motor 20 ends. The time may be controlled to be different time points. According to this, flexible control is possible by independently rotating the fan and the filter.

Of course, as in the seventh modification, the control unit 90 starts the rotation of the motor 20 before the rotation of the fan 60, resumes the rotation again after a temporary interruption during the rotation of the fan 60, and then ends the rotation of the fan 60 The control may be performed so that the time of rotation and the time of ending rotation of the motor 20 are simultaneous.

In Modifications 8 and 9 of the rotation of the filter, the control unit 90 changes the number of rotations per unit time of the fan 60 and changes the number of rotations of the motor 20 (filter 10) according to the number of rotations of the fan 60. Control. The rate of change of the rotational speed of the fan 60 and the rate of change of the rotational speed of the motor 20 may be the same as in the eighth modification, or may be different as in the ninth modification. According to this, when a large amount of oil adheres, a stronger centrifugal force is applied to quickly discharge the oil from the filter 10 to prevent the clogging of the filter 10 and reduce the amount of the adhered oil, and the rotation of the range hood When the speed is slow, it is possible to prevent the filter 10 from rotating at high speed more than necessary. Further, as in the eighth modification, the control unit 90 may change the rotational speeds of the fan 60 and the motor 20 in stages. According to this, it is possible to control the number of rotations that can be easily understood by the user, such as strong, medium, and weak. Note that the number of rotations such as high, medium, low, etc. is a relative number of rotations, and does not mean an absolute number of rotations.

Usually, when performing cooking that generates a lot of oil smoke, a high rotational speed of the fan is selected and used. Therefore, as the rotational speed of the fan is faster, more oil smoke tends to be generated. That is, as the rotational speed of the fan increases, the amount of oil adhering to the filter 10 increases, and clogging occurs more quickly. Therefore, by increasing or decreasing the number of revolutions per unit time of the filter 10 according to the rotational speed of the fan, if a large amount of oil is attached, the filter 10 is rotated at a higher speed to give stronger centrifugal force and the oil quickly To prevent clogging of the filter 10 and to prevent the filter 10 from rotating at a high speed more than necessary when the rotational speed of the fan is slow.

Table 1 shows the relationship between the pore size (mm) and the rotational speed (rpm) of the filter and the collection rate in this example. The hole diameter measured the collection rate by four types, 0.75 mm, 1 mm, 1.5 mm, and 2 mm. When the number of revolutions of the filter is 0 rpm, it is understood that the collection efficiency is not high in the filter which is not rotating, which is lower than 70% which is the best collection rate among the conventional filters at any hole diameter.

On the other hand, when the filter is rotated at 1000 rpm, the collection rate is 77%, which is higher than the collection rate of the best filter of the prior art, even for the filter of 2 mm in pore diameter with the lowest collection rate. In addition, as the hole diameter decreases to 1.5 mm, 1 mm, and 0.75 mm, the collection rate further increases to 80%, 86%, and 88%. Furthermore, assuming that the rotational speed of the filter is 1500 rpm, the collection rate becomes increasingly high as 84%, 86%, 91%, 93% as the hole diameter decreases to 2 mm, 1.5 mm, 1 mm, 0.75 mm. Become. Furthermore, assuming that the rotational speed of the filter is 2000 rpm, the collection rate becomes 88%, 90%, 90% as the hole diameter decreases to 2 mm, 1.5 mm, 1 mm. Therefore, the range hood which concerns on this invention collects the oil component contained in air because a fan rotates a filter, generating the flow of air. Furthermore, it can be seen that high oil collection efficiency can be obtained by increasing the number of revolutions per unit time of the filter or decreasing the pore diameter.

FIG. 8 is a test configuration used in a test for obtaining the relationship between the collection rate of the filter in the range hood using the slot filter of this embodiment and the conventional type and the oil adhesion to downstream parts such as a fan and a duct. FIG. In order to confirm the oil adhesion state to the downstream parts by the difference in the collection rate by the filter using the difference in the collection rate due to the difference in the pore diameter of the filter of this example, the following test was performed .

The test method is as follows. A range hood provided with the filter according to the present invention is provided 800 mm above the temperature-controllable hot plate. A stainless steel cylinder is placed on a hot plate heated to 245 ° C., and oil is dropped from the pump to the stainless steel cylinder at 2.5 g / min and 8 g / min. The test time is 10 minutes. In addition, the rotational speed of the filter is 1500 rpm.

The results of this test are shown in Table 2. According to this test, in a range hood using a slot filter which is a conventional type range hood, 50% of the oil is collected by the filter, and 23% of the oil adheres to the downstream part. The remaining 27% of the oil will be discharged outside with the air. On the other hand, in the cooker hood of the present embodiment, which is provided with a filter having a pore diameter of 2.0 mm, 83% of oil is collected by the filter, and 7% of oil is adhered to the downstream part. Moreover, in the range hood provided with the filter with a hole diameter of 1.5 mm, 83% of an oil component is collected in a filter and 2% of an oil component adheres in downstream components. Moreover, in the range hood provided with a filter with a hole diameter of 1.0 mm, 87% of the oil is collected in the filter, and surprisingly, no adhesion of the oil is observed in the downstream part.

According to this test, compared with the collection rate of the conventional type range hood, in the range hood according to the present embodiment, the collection rate with the filter is obviously higher than 83%. As a result, it is possible to significantly suppress the adhesion of oil to downstream parts that require time-consuming cleaning and cleaning. Considering that the collection rate of the conventionally known range hood is at most 70%, the range hood according to the present invention used in this test is 83% or more despite the change in the pore size. It has a collection rate, and it can be said that the range hood according to the present invention has high collection efficiency. Therefore, in the range hood according to the present invention, since oil hardly adheres to the downstream portion of the air flow path, it is possible to greatly reduce the time for cleaning / cleaning the downstream portion from the filter.

Second Embodiment
Descriptions overlapping with the first embodiment will be omitted, and only differences will be described. The present embodiment is different from the first embodiment only in the control method of the control unit for the fan 60 and the motor 20, so the control unit will be described as the control unit 90A.
The control unit 90A performs control such that the motor 20 is not rotated at the stage where the rotational speed of the fan 60 is the smallest. That is, when changing the rotational speed of the fan 60 as in the above-described eighth and ninth modifications, the control unit 90A performs control so as not to rotate the electric motor 20 when the rotational speed of the fan 60 is small. The main sources of noise generated from the range hood include fans and wind noises that cause the flow of exhaust air. That is, when the motor 60 is operated at a low rotational speed such as a weak operation of the fan 60, the noise is small as a whole, so that the noise accompanying the rotation of the filter 10 or the motor 20 becomes noticeable. Therefore, it may be preferable not to rotate the filter during weak operation. According to this, when the noise accompanying the rotation of the filter is noticeable, the quiet range hood can be provided by not rotating the filter.

On the other hand, when the fan 60 is operated at a relatively high rotational speed such as medium or high, the control unit 90A erases the rotational noise of the filter 10 by the noise generated by the fan 60, so the filter 10 Rotate. In addition, when the fan 60 is in a weak operation, the amount of oil smoke generated by normal cooking is small, and the total amount of oil adhering to the filter 10 is small, so it is not necessary to prevent clogging of the filter 10 by rotation.

In addition, when the rotation of the fan 60 is completed after the fan 60 rotates only at the stage where the rotation speed per unit time of the fan 60 is the smallest, the control unit 90A rotates the motor 20 (filter 10) when the rotation of the fan 60 is completed. It may be controlled to According to this, after the end of the operation of the range hood, for example, when the user leaves the vicinity of the cooking table, it is possible to fly the oil adhering by rotating the filter 10 immediately, and the oil is quickly ejected from the filter 10 While preventing clogging of a filter and reducing the adhesion amount of oil, it can provide the range hood which does not mind noise to the user away from the range hood.

The stage in which the number of revolutions per unit time of the fan 60 is the smallest may be the smallest stage in the number of revolutions of the fan 60 assumed to be used during cooking. That is, in the range hood equipped with a constant ventilation function for the entire room, the number of rotations at the time of constant ventilation operation is usually the smallest, for example, the number of rotations of the fan 60 increases in the order of next weak, middle and strong operation. However, constant ventilation operation does not assume use at the time of cooking. Therefore, in such a case, weak operation may be adopted as the stage in which the number of revolutions per unit time of the fan 60 is the smallest.

The present invention is not limited to the illustrated embodiments, and can be implemented with a configuration that does not deviate from the contents described in the respective claims.

Reference Signs List 1 range hood 2 range opening 3 filter unit 10 filter 11 hole 20 motor 21 motor rotational shaft 30 oil collection member 31 oil reservoir 40 motor mounting bracket 41 motor mounting hole 50 mounting plate 51 mounting plate opening 52 extension DESCRIPTION OF SYMBOLS 60 fan 61 fan casing 62 intake port 70 current regulation plate 80 hood part 81 inner panel 82 fan box 90 control part 91 filter rotation control switch D exhaust duct A air flow OP oil content OL oil

Claims

With a fan that generates an air flow,
A filter having a hole on the flow path of the air flow and upstream of the fan and passing the air flow;
A motor for rotating the filter;
An oil collection member surrounding the periphery of the filter;
And a controller configured to control the rotation of the motor and the fan.
The range hood, wherein the control unit may rotate the fan and the motor simultaneously.
The control unit simultaneously starts the rotation of the fan and the rotation of the motor, and / or simultaneously ends the rotation of the fan and the rotation of the motor. The range hood according to claim 1, wherein the range hood is controlled to be.
The control unit performs control such that the time to start the rotation of the fan and the time to start the rotation of the motor are simultaneous, and ends the rotation of the motor after a predetermined time has elapsed after the end of the rotation of the fan. The range hood according to claim 2, wherein the range hood is controlled.
The control unit is configured to start the rotation of the fan at a different time when starting the rotation of the motor, and to stop the rotation of the fan at different times when the rotation of the motor is ended. The range hood according to claim 1, wherein the range hood is controlled to be.
The range hood according to any one of claims 1 to 4, wherein the control unit changes the number of rotations of the fan and changes the number of rotations of the motor according to the number of rotations of the fan.
The range hood according to claim 5, wherein the control unit changes the rotational speeds of the fan and the motor stepwise.
With a fan that generates an air flow,
A filter having a hole on the flow path of the air flow and upstream of the fan and passing the air flow;
A motor for rotating the filter;
An oil collection member surrounding the periphery of the filter;
And a controller capable of stepwise changing the rotational speed of the motor and the fan.
The range hood characterized in that the control unit does not rotate the motor at a stage where the rotational speed of the fan is the smallest.
The control unit is configured to rotate the motor when the rotation of the fan is completed when the rotation is ended after the fan is rotated only at a stage where the rotation speed of the fan is the smallest. Range hood described.
The range hood according to any one of claims 1 to 8, further comprising a filter rotation control switch for controlling the rotation of the motor.