JP6353629B2 - Range food - Google Patents

Description

  The present invention relates to a range hood that collects oil from oil smoke generated by cooking, and more particularly to a range hood that can collect oil in an oil reservoir without using gravity.

A range hood installed in a kitchen or the like inhales steam or smoke generated by cooking under the range hood together with the air flow generated by the fan, and the oil smoke or the like together with the inhaled air to the outdoors. It is what is discharged. However, it is not environmentally preferable to discharge the oil contained in the oil smoke to the outside as it is, and the oil is attached to equipment such as fans and ducts that are usually present downstream of the range hood in the air flow path for cleaning, etc. A large amount of labor / cost is required for maintenance of the equipment, and the deterioration of the equipment is promoted.
Therefore, conventionally, the hood has been devised in many ways for capturing and collecting the oil contained in the oil smoke in a filter or the like.

  As a device for increasing the collection efficiency of the filter, for example, there is a technique disclosed in Patent Document 1. In this document, a plurality of rows are formed by vertically arranging slits on a thin metal plate of a predetermined shape at a pitch of several millimeters, and the entire tongue piece defined by the slits in each row is refracted and inclined in one direction. Thus, there is disclosed a range hood in which a single filter is formed by providing a vent hole having a vertical width of several millimeters without leaving a plane portion between the slits, and the filter or a combination of a plurality of filters is attached. In this range hood, the oil collected by the filter is collected in an oil sump using an inclination.

  Moreover, in patent document 2, a narrow suction port is formed in the parallel 2 edge of the cover plate which covers the lower open part of the food | hood body, or the part near 3 edges or 4 edges, and from the suction opening, Oil and fat contained in the centrifugal action by the suction force of the exhaust device by sufficiently changing the direction of the waste gas flowing in at an increased flow rate and making contact with the annular waste gas collision means provided in an endless manner provided immediately after the suction port. The oil and fat adhering to the annular waste gas collision means is dropped from the free end facing the waste gas abutting surface across the suction port to the back surface of the waste gas abutting surface. In addition, a range hood is disclosed in which the oil and fat content is collected in an oil receiving portion by utilizing the inclination of the waste gas abutting surface.

Japanese Utility Model Publication No. 02-043456 JP 2005-315544 A

  The above-mentioned range hood collects the oil collected by the filter or the like into the oil reservoir by gravity by inclining the member between the oil collecting component and the oil reservoir that collects the oil that constitutes the range hood. doing. However, with the method of collecting the oil by gravity, there is a problem that not all of the oil can be liquefied, and a part of the oil stagnates and gets stuck before reaching the oil reservoir.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to collect the collected oil without using gravity, for example, by tilting a member that guides the oil to the oil reservoir. An object of the present invention is to provide a range hood that quickly leads to an oil sump without being fixed and collects it.

  As a result of diligent study to solve the above-mentioned problems, the present inventor collected oil and generated a swirling flow around the filter by rotating the filter while operating the range hood fan. The present inventors have found that the oil component is recovered by flowing the oil component using the swirling flow, and have completed the present invention.

In order to solve the above problem, a fan that generates an air flow, a filter that is on the upstream side of the fan on the air flow path and has a hole through which the air flow passes, and the filter are provided. An electric motor that rotates, and an oil collecting member that surrounds the filter and has an oil content guide opening that guides oil to an oil reservoir, and the fan generates an air flow and the motor rotates the filter. The oil contained in the air is collected in the oil collecting member by the movement of the spiral air generated by the rotation of the filter, and the oil collected in the oil collecting member is guided to the oil reservoir through the oil guiding opening. a range hood for the rotational speed per unit of filter time, range hood, characterized in that at least 230rpm to generate air movement spiral It is provided.
According to this, it is possible to provide a range hood that promptly guides and collects collected oil without fixing gravity, such as tilting a member that guides oil to the oil reservoir, without using gravity. it can.

Further, the filter may be disk-shaped, and the rotating shaft of the electric motor may be attached to the center of the filter disk.
According to this, it has a simple structure and can provide a thin range hood.

Furthermore, the oil component opening may be provided on an inner wall of the oil collecting member surrounding the filter.
According to this, the oil component flowing on the inner surface of the oil component collecting member can be recovered by the swirling flow caused by the rotation of the filter.

Furthermore, the oil content guide opening portion may be provided on the inner wall surrounding the periphery of the filter of the oil content collecting member over the entire height of the inner wall.
According to this, the oil component flowing on the inner surface of the oil component collecting member can be reliably recovered by the swirl flow caused by the rotation of the filter.

Further, the upstream end of the oil collecting member may further include an upstream extending portion extending inward from the inner wall of the oil collecting member.
According to this, it is possible to prevent the collected oil from dripping down the range hood.

Furthermore, the oil component opening may be provided in an upstream extending portion of the oil collecting member.
According to this, due to the swirling flow caused by the rotation of the filter, the oil component that hangs down on the downstream surface of the upstream extension portion due to gravity and flows can also be collected.

Furthermore, the oil content guide opening may be provided in a portion that is an upstream extension and is in contact with the inner wall.
According to this, it is also possible to collect the oil component that hangs down on the surface on the downstream side of the upstream extension portion due to gravity and that flows in the centrifugal direction due to the swirling flow.

Furthermore, the inner wall of the oil collecting member may not have corners.
According to this, the range hood which has an oil content collection member in which the oil content which flows by a swirl flow is hard to stay can be provided.

Furthermore, the curvature of the inner wall of the oil collecting member surrounding the periphery of the disk-shaped filter may be only composed of a curvature not more than 10 times the curvature of the peripheral edge of the disk-shaped filter.
According to this, the range hood which has an oil content collection member in which the oil content which flows by a swirl flow is hard to stay can be provided.

Furthermore, the surface of the inner wall surrounding the periphery of the filter and / or the surface on the downstream side of the upstream extension portion of the oil collecting member may have oil repellency.
According to this, the range hood which has an oil content collection member in which an oil content tends to flow can be provided by the swirling flow which rotation of a filter causes.

Further, the downstream end of the oil collecting member may further include a downstream extending portion extending inward from the inner wall of the oil collecting member.
According to this, by capturing the oil that scatters in the outer peripheral direction on the downstream side of the filter, the ratio of collecting the oil that has passed through the holes of the filter increases, and a range hood with higher oil collection efficiency can be obtained. Can be provided.

Further, the shortest distance between the downstream end of the oil collecting member surrounding the filter and the downstream disk surface of the filter is the shortest distance between the upstream end of the oil collecting member and the upstream disk surface of the filter. It may be characterized by being more than a distance.
According to this, even if the length of the oil collecting member on the downstream side is smaller than the filter, the oil that has passed through the hole of the filter is also captured by capturing the oil scattered in the outer peripheral direction on the downstream side of the filter. The ratio that can be collected increases, and a range hood with high oil collection efficiency can be provided.

  As described above, according to the present invention, the collected oil component is promptly guided to the oil reservoir and collected without using gravity, for example, by inclining a member for guiding the oil component to the oil reservoir, or by using gravity. A range hood can be provided.

Sectional drawing of the 1st Example of the range hood which concerns on this invention. The front view (A), side view (B), bottom view (C), and rear view (D) which show the filter and its peripheral part in the first embodiment of the range hood according to the present invention. The perspective view seen from the lower part which shows the filter and its peripheral part in 1st Example of the cooker hood which concerns on this invention. The expanded sectional view which shows the filter in the 1st Example of the range hood which concerns on this invention, and its peripheral part (The position of a cross section is the AA cross section in FIG. 2). Front view (A), bottom view (B), side view (C), sectional view (D), enlarged sectional view (E), perspective view showing oil collecting member in first embodiment of range hood according to the present invention FIG. (F), enlarged perspective view (G). Front view (A), plan view (B), bottom view (C), left side view (D), right side view (E), upper right perspective view showing an oil reservoir in the first embodiment of the range hood according to the present invention. FIG. (F), lower right perspective view (G), upper left perspective view (H), lower left perspective view (I), and BB cross-sectional view (J). Operation | movement explanatory sectional drawing in the 1st Example of the range hood which concerns on this invention. The action explanation expanded sectional view in the first example of the range hood concerning the present invention. Action | operation explanatory drawing in the 1st Example of the range hood which concerns on this invention. Front view (A), bottom view (B), side view (C), AA sectional view (D), enlarged view showing an oil collecting member in Modification 1 of the first embodiment of the range hood according to the present invention. Sectional drawing (E), a perspective view (F), and an enlarged perspective view (G). Front view (A), bottom view (B), side view (C), AA cross-sectional view (D), enlarged view showing an oil collecting member in Modification 2 of the first embodiment of the range hood according to the present invention. Sectional drawing (E), a perspective view (F), and an enlarged perspective view (G). Front view (A), bottom view (B), side view (C), AA sectional view (D), enlarged view showing oil collecting member in modification 3 of the first embodiment of the range hood according to the present invention. Sectional drawing (E), a perspective view (F), and an enlarged perspective view (G). The front view (A), top view (B), bottom view (C), side view (D) of 2nd Example of the range hood which concerns on this invention. The perspective view (A) of the second embodiment of the range hood according to the present invention, the perspective view (B) with the rectifying plate removed, the perspective view (C) with the oil sump removed, and the perspective view with the filter removed (D) ). The disassembled perspective view of the filter unit in the 2nd Example of the range hood which concerns on this invention. Sectional drawing of filter unit vicinity in the 2nd Example of the range hood which concerns on this invention. The expanded sectional view of the filter unit vicinity in the 2nd Example of the range hood which concerns on this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
<First Example>
FIG. 1 shows a range hood 1 in a first embodiment according to the present invention. The range hood 1 has a thin hood portion 80 having a concave inner panel 81 on the inner surface for collecting steam, oily smoke, etc. generated by cooking performed below. The hood portion 80 is coupled to the blower box 82 connected to the exhaust duct D in the vicinity of the hood opening 2 located at substantially the center thereof. The blower box 82 includes a fan casing 61 inside, and the fan casing 61 includes a fan 60 that is a sirocco fan and generates an air flow. The suction port 62 of the fan 60 is disposed so as to be positioned in the hood opening 2 of the hood unit 80. Accordingly, when the fan 60 is operated, the hood opening 2 becomes negative pressure, and the air below the inner 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 on the upstream side of the fan 60 on the flow path of the air flow generated by the fan 60.

  The hood opening 2 has a mounting plate 50 attached so as not to form a gap that can be an air flow path with the inner surface panel 81, a disc-shaped filter 10 having a hole through which air flows, and a filter The rotating shaft is connected to the center of the disk 10, the motor 20 rotates the filter 10, the motor mounting tool 40 for mounting the motor 20 to the mounting plate 50, and the mounting plate 50 is attached to the outer peripheral edge of the filter 10. There is an oil collecting member 30 having an oil guide opening that surrounds and guides the oil into the oil reservoir. 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 has a hole through which the air flow passes from the bottom to the top in the drawing. The filter 10 is provided to be rotatable.

  The air below the inner panel 81 includes steam, oily smoke, etc. generated by cooking. When the fan 60 is operated, it exists in the hood opening 2, that is, on the flow path of the air flow generated by the fan 60. Thus, the air is sucked into the hole of the filter 10 located on the upstream side of the fan 60 and passes through the hole. The filter 10 is rotatably provided by the electric motor 20. When the range hood 1 is operated, the fan 60 generates an air flow and the electric motor 20 rotates the filter 10. The range hood 1 collects oil contained in the air in the oil collecting member 30 by rotating the filter 10. In addition, the range hood 1 uses the swirl flow around the filter 10 generated by rotating the filter 10, and the oil collected in the oil collecting member 30 is transferred to the oil reservoir 31 through the oil guiding opening 32. Induce. In addition, how to collect and collect will be described later.

  Such a range hood 1 uses a conventional slot filter, HEPA filter, etc., and has a small pressure loss as compared to improving the oil collecting efficiency by making slits and eyes fine or overlapping to form a multilayer. It can have high oil collection efficiency in the state. In other words, using a conventional slot filter, HEPA filter, etc., if the slits are made finer or overlapped into multiple layers to improve oil collection efficiency, the filter vent forms a complex flow path. Therefore, the ventilation resistance tends to be high, but in the case of such a range hood 1, the oil collecting efficiency is increased by the rotation of the filter, and thus it is not necessary to form such a complicated flow path. Therefore, it is possible to obtain a high oil collection efficiency while maintaining a low ventilation resistance as compared with the conventional filter. In addition, the filter is less likely to clog due to oil adhering to the filter, thereby reducing the cleaning effort of the filter itself and preventing an increase in pressure loss as it is used. Since the oil hardly adheres to the downstream portion, it is possible to provide a range hood that greatly reduces the trouble of cleaning / washing the downstream portion from the filter. Furthermore, by using the swirl flow around the filter 10 generated by rotating the filter 10, the oil collected in the oil collecting member 30 is guided to the oil reservoir 31 through the oil guiding opening 32. It is possible to provide a range hood that quickly guides and collects the collected oil component without using gravity such as inclining a member that guides the oil component to the oil reservoir 31 without using gravity.

  The type of the 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 sirocco fan with a high static pressure used for the present Example. A rectifying plate 70 that is detachable from the hood unit 80 and that has a gap between the hood unit 80 and increases the suction force is provided below the hood unit 80. Although the range hood 1 in the present embodiment includes the current plate 70, the presence of the current plate 70 is not particularly limited and may or may not be present. When the rectifying plate is not present or when the rectifying plate is removed, the concave inner surface panel 81 that is the inner surface of the hood portion 80, and the mounting plate 50 that is attached so that no gap is generated in the inner surface panel 81, The disc-shaped filter 10 and the oil collecting member 30 attached to the mounting plate 50 and provided so as to surround the outer peripheral edge of the filter 10 can be directly recognized by the user. The oil collecting member 30 includes an oil reservoir 31.

  Further, in this embodiment, the filter 10 is formed from a thin plate having a disk shape, but the present invention is not limited to this, and for example, the filter may be cylindrical. In this case, the cylindrical filter has a hole through which the cylinder rotates by connecting the rotating shaft of the electric motor to the central axis of the cylinder and allows the air flow to pass through the side surface of the cylinder. The air flow is configured to pass from the outside to the inside of the side surface of the cylinder. The oil collecting 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 collecting member includes an opening that opens downward to suck air and an opening that flows to let the air flow to the fan side. When the cylinder is installed vertically, the filter does not open the bottom of the cylinder in order to suck air flow from the side of the cylinder, and the oil collecting member is provided so as to surround the entire filter side. Since it has a simple structure and can provide a thin range hood, a filter having a disk shape as in this embodiment and formed from a thin plate is preferable.

  In this embodiment, the filter 10 is formed from a single thin plate, but may be formed from a plurality of thin plates, or a plurality of filters may be arranged on the flow path of the air flow. . According to such a configuration, even when the rotational speed of the filter is not sufficient, the oil collection rate becomes higher.

  Further, in this embodiment, the portions other than the holes on the surfaces on both sides of the filter 10 are smooth surfaces that are flat and smooth with no protrusions or irregularities, but are not limited to this, and are not limited to this. There may be protrusions such as cut and raised together with slits (holes). If the filter has a smooth surface as in this embodiment, the ventilation resistance of the air flow in the filter is further reduced, and further, the rotational resistance of the filter is also reduced, so the electric motor for rotating the filter has a small torque. Things are enough. Moreover, since there is no protrusion such as a cut and raised on the filter, it is possible to provide a range hood with low noise for cutting air. Further, 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 almost no oil is collected on the side of the filter hole, so the filter hole is less likely to be clogged with oil, and further cut and raised. Since there are no protrusions, the filter itself can be easily cleaned / washed.

  2-6 shows the components regarding the filter 10 of the range hood 1, and its peripheral part (henceforth a filter unit). The filter unit 3 has a mounting plate 50 attached to the hood opening 2, a disk-shaped filter 10 having a hole through which air flows, and a rotary shaft connected to the center of the disk of the filter 10 to rotate the filter 10. An electric motor 20 to be attached, an electric motor mounting tool 40 for attaching the electric motor 20 to the mounting plate 50, an oil collecting member 30 attached to the mounting plate 50 so as to surround the filter 10, and an oil collecting member And an oil sump 31 attached to a part of 30.

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

  The motor fixture 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 electric motor attachment 40 has a hole 41 through which the rotating shaft 21 of the electric motor 20 is passed substantially at the center. The electric motor attachment 40 is attached to the attachment plate 50 so that the hole 41 is the center of the attachment plate opening 51 in a plan view.

  The electric motor 20 is fixed to the electric motor fixture 40 by passing the rotation shaft through the hole 41 of the electric motor fixture 40 from the upper side to the lower side in the drawing (from the downstream side to the upstream side of the air flow). The The rotating shaft 21 of the electric motor 20 is the center of a circular mounting plate opening 51 in plan view.

  The filter 10 is detachably attached to the tip of the rotating shaft 21 of the electric motor 20 so that the surface of the filter 10 is perpendicular to the rotating shaft 21. The outer shape of the filter 10 is circular, and the filter 10 is attached to the rotating shaft 21 of the electric motor 20 located at the center of the circular attachment plate opening 51 at the center of the filter 10. The outer shape of the part 51 is a concentric circle. In the present 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 downstream extending portion 52. The downstream extending part 52 extends to the upstream end of the oil collecting member 30 from the inner wall of the oil collecting member 30, that is, to the rotating shaft side of the electric motor 20. The downstream extending portion 52 is preferable because it increases the ratio of collecting oil that has passed through the holes and can provide a range hood with high oil collecting efficiency.

  The position of the filter 10 in a front view is below the lower surface of the mounting plate 50, that is, upstream of the air flow. Therefore, the oil collecting member 30 is attached to the attachment 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 collecting member 30 needs to be larger than 0 so that they do not contact each other, but is preferably as small as possible so that the oil does not leak. In this embodiment, it is about 2.5 mm. The filter 10 is made of a thin plate having a circular outer shape by punching metal. The material is stainless steel, the plate thickness is 0.5 mm, and the diameter is 285 mm, but it is not limited to this.

  In the present embodiment, the shape of the hole 11 (shown in FIG. 8) of the filter 10 is circular, and the diameter of the hole 11 is about 0.75 to 5 mm. The holes 11 in the disk-shaped filter 10 are arranged concentrically around the rotation center of the disk. However, the shape, size, and arrangement of the holes are not limited to this. For example, the hole arrangement may be any arrangement, such as holes being drilled at the vertices of regular triangles, holes being drilled at the vertices of regular squares, or irregularly randomly. Further, the shape of the hole may be any shape such as a triangle, a square, or a regular polygon in addition to the following modifications.

  FIG. 5 shows the oil collecting member 30 in the present embodiment. The oil collecting member 30 is bounced off by hitting the upstream surface of the filter 10 and collects the oil that collided with the inner wall of the oil collecting member 30. Details will be described later.

  The oil collecting member 30 has a cylindrical portion surrounding the outer peripheral edge of the disk-shaped filter 10. The cylindrical part has an outer diameter of 294 mm and an inner diameter of 290 mm, which is slightly larger than the diameter of the filter 10. The gap between the two is preferably as small as possible so that oil does not leak. The height of the oil collecting member 30 is not particularly limited, but the shortest distance between the downstream end (upper end) of the oil collecting member 30 and the disk surface on the downstream side of the filter 10 is the height of the oil collecting member 30. It is preferable to have a height equal to or greater than the shortest distance between the upstream end (lower end) and the upstream disk surface of the filter 10. Thereby, the ratio which can also collect the oil component which passed the hole 11 increases by capturing the oil component which scatters toward the outer periphery direction in the downstream of the filter 10, and can make oil collection efficiency higher. .

  The oil collecting member 30 includes a flange at the downstream end (upper end), and is easy to attach to the mounting plate 50. Moreover, it is preferable that the oil content collection member 30 is provided detachably for cleaning. The oil collecting member 30 has an upstream extending portion 34 extending inward from the inner wall of the cylindrical portion at the upstream end (lower end) of the cylindrical portion, and collides with the side surface of the oil collecting member 30. The oil OL that falls down can be received. Further, the swirling flow caused by the rotation of the filter 10 can also collect the oil component that hangs on the downstream surface of the upstream extending portion 34 due to gravity and flows. Further, the oil content guide opening 32 may be provided on the inner wall of the cylindrical portion surrounding the periphery of the filter 10 of the oil content collecting member 30 over the entire height of the inner wall. According to this, the oil component flowing on the inner surface of the oil component collecting member 30 can be reliably recovered by the swirl flow caused by the rotation of the filter 10.

  The oil component collecting member 30 has an oil component guide opening 32 that guides the oil component to the oil reservoir 31. In this embodiment, the oil content guide opening 32 defines the boundary between the inner wall and the upstream extension 34 on both the inner wall and the upstream extension 34 of the cylindrical portion surrounding the filter 10 of the oil collecting member 30. It is opened including. According to this, the oil component flowing on the inner surface of the cylindrical portion of the oil collecting member 30 can be recovered by the swirling flow caused by the rotation of the filter 10, and the oil component hangs down and flows on the downstream surface of the upstream extending portion 34 due to gravity. Oil can also be recovered. The oil component opening 32 is not particularly limited as long as it is formed in a part of the oil collecting member 30 in the circumferential direction and has a size that allows oil to flow.

  FIG. 6 shows an oil sump 31 in this embodiment. The oil sump 31 is guided by the oil content guide opening 32 and is detachably attached to the oil content collection member 30 so as to sufficiently cover the oil content guide opening 32 so that the oil flowing out from the oil content collection member 30 can be collected. Provided. In this embodiment, the oil sump 31 has a length that is at least twice as long as the circumferential length of the oil content guide opening 32 and is adapted to fit the outer surface of the oil content collection member 30 and the outside of the bottom. Have Thus, by rotating the filter 10, oil contained in the air is collected in the oil collecting member 30, and the oil collected in the oil collecting member 30 is passed through the oil guiding opening 32. Can be guided to the oil reservoir 31.

  In addition, although the height of the range hood 1 consists of the height of the food | hood part 80 and the height of the air blower box 82, the height of the air blower box 82 is prescribed | regulated from the height of the fan 60 substantially. In addition, since air containing oil or the like is sucked and exhausted from the gap between the upper surface of the rectifying plate 70 and the lower end of the oil collecting member 30, a larger gap is advantageous because the ventilation resistance is smaller. Therefore, in order to provide a thin range hood, it is important to reduce the height of the filter unit 3. In this embodiment, the filter unit 3 is thin and preferable because the filter 10 is formed from a thin plate having a disk shape.

  FIG. 7 and FIG. 8 explain the action of collecting the oil component accompanying the air flow in the range hood 1. FIG. 7 shows the action of the air flow in the entire range hood 1. The heated air A rises toward the range hood 1 together with steam, oily smoke, etc. generated by cooking performed below 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 drawing. Then, the air rising around the rectifying plate 70 is sucked from between the rectifying plate 70 and the inner surface panel 81, 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. The Then, the air is discharged from the blower box 82 to the exhaust duct D.

  The rotational speed per unit time of the filter 10 may be at least 230 rpm (Rotation Per Minute) or more, although it depends on the opening state of the filter hole. When the filter 10 rotates at a relatively high speed, the surface of the filter 10 (the portion without the hole 11) drags the air in contact with the surface by frictional force, and the movement is transmitted to the nearby air due to the viscosity of the air. The movement of air occurs near the surface of the filter 10, and the filter 10 is rotating, so that the movement of the air is a vortex around the rotation axis.

  This spiral air movement occurs on both surfaces of the filter 10, that is, on both the lower surface and the upper surface of the filter 10, in other words, on both the upstream surface and the downstream surface 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 through the hole 11 of the filter 10 in the drawing, the movement of the spiral air on the downstream side of the filter 10. While being separated from the surface of the filter 10, a spiral flow toward the outer peripheral edge of the filter 10 is generated and sucked 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 vortex air is pressed against the surface of the filter 10, and a high-density air layer with a vortex flow toward the outer peripheral edge of the filter 10 is formed.

  FIG. 8 shows the effect of the air flow in the filter unit 3. The oil component OP1 generated by cooking or the like flows along with the air flow A and reaches the vicinity of the upstream surface of the filter 10. The oil component OP2 that has reached the vicinity of the upstream side is partly (oil component with a small particle diameter) due to a spiral flow toward the outer periphery of the dense air layer, and the other part (oil component with a large particle diameter) is By colliding with the upstream surface of the filter 10 (the portion without the hole 11), the filter 10 is blown off in the direction of the outer peripheral edge. As a result, it is collected as an oil component OP3 on the inner wall of the cylindrical portion that is the side surface of the oil collecting member 30 provided so as to surround the outer peripheral edge of the disk-shaped filter 10, and the lower portion of the cylindrical portion of the oil collecting member 30 Or it collect | recovers as oil OL by the upstream extension part 34 which is a bottom part.

  FIG. 9 is a view for explaining the operation in which the oil OL recovered at the lower part or the bottom part of the side surface of the oil collecting member 30 is guided to the oil guiding opening 32. The oil OL collected at the lower part or bottom of the side surface of the oil collecting member 30 is rotated around the rotating shaft 21 of the filter 10 (rotation counterclockwise in this embodiment) and the oil collecting member. The lower part or the bottom part of the side surface of the oil collecting member 30 is rotated by the flow of air generated in the same direction as the rotation direction of the filter 10 in a space between the oil collecting member 30 and the oil collecting member 30. As a result, the oil OL reaches the oil component guide opening 32 before going around at least one round, and is collected in the oil reservoir 31 via the oil component guide opening 32. According to this, it is possible to provide a range hood that quickly guides and collects collected oil without sticking the collected oil without using gravity such as inclining a member that guides oil to the oil reservoir 31. Can do. Conversely, even when the filter 10 is inclined at 45 degrees, it has been confirmed that the oil OL rotates the lower part and the bottom part of the side surface of the oil collecting member 30.

  The oil collecting member preferably has oil repellency on the surface of the inner wall surrounding the filter 10 and / or on the downstream surface of the upstream extension 34. According to this, the oil component easily flows due to the swirling flow caused by the rotation of the filter 10. The oil repellency is produced, for example, by subjecting the surface of the member to an oil repellency treatment such as coating an oil repellant or a resin to which an oil repellant is added. Moreover, it is preferable that the inner wall of the cylindrical part of the oil collecting member 30 does not have a corner. According to this, the oil component that flows due to the swirling flow is less likely to stay. The corner is a corner or corner formed by surface irregularities. Further, it is preferable that the curvature of the inner wall of the cylindrical portion of the oil collecting member surrounding the disk-shaped filter 10 is only a curvature that is not more than 10 times the curvature of the peripheral edge of the disk-shaped filter 10. According to this, since there is no small unevenness, the oil component that flows due to the swirling flow is less likely to stay.

  The oil that has become very fine particles passes through the holes of the filter 10 together with the air flow A, but some of them are downstream of the filter 10 of the downstream extension 52 and the oil collecting member 30. It can be recovered by colliding with the inner wall of the side. Part of the oil that could not be finally recovered adheres to the fan 60, the exhaust duct D, etc. located downstream from this, but most of the oil that became fine enough to pass through the holes of the filter 10 Then, it rides on the air flow A as it is, and is discharged to the outside through the exhaust duct D. Therefore, the range hood 1 of the present embodiment according to the present invention hardly cleans / washes the fan 60, the exhaust duct D, and the like in the downstream portion of the filter 10 while hardly attaching oil to the downstream portion of the air flow path from the filter 10. Time and effort can be greatly reduced.

<Modification 1 of the first embodiment>
FIG. 10 shows Modification 1 of the oil collecting member in the first embodiment according to the present invention. The description overlapping with the first embodiment is omitted, and only different points will be described. The oil collecting member 30 </ b> A has an oil content guide opening 32 </ b> A that guides the oil content to the oil reservoir 31. In this modification, the oil component opening 32A is opened at the lower part of the inner wall of the cylindrical portion surrounding the filter 10A of the oil collecting member 30A so as to be in contact with the upstream extending portion 34A serving as the bottom. According to this, the oil component flowing on the inner surface of the oil component collecting member can be recovered by the swirling flow caused by the rotation of the filter 10A.

  The oil OL recovered at the lower side or bottom of the side surface of the oil collecting member 30A is the lower part of the inner wall of the cylindrical portion surrounding the filter 10 of the oil collecting member 30A due to the air flow generated with the rotation of the filter 10A. Alternatively, the upstream extending portion 34A that is the bottom portion is rotated. Then, the oil OL reaches the oil component guide opening 32A before it makes at least one round, and even if the oil OL is at the bottom, centrifugal force works and is collected in the oil reservoir 31A through the oil component guide opening 32A. be able to.

<Modification 2 of the first embodiment>
FIG. 11 shows Modification 2 of the oil collecting member in the first embodiment according to the present invention. The description overlapping with the first embodiment is omitted, and only different points will be described. The oil component collecting member 30 </ b> B has an oil component guide opening 32 </ b> B that guides the oil component to the oil reservoir 31. In the present modification, the oil component guide opening 32B is opened at the upstream extension 34B of the oil collecting member 30B so as to contact the inner wall of the cylindrical portion surrounding the filter 10B of the oil collecting member 30B.

  The oil OL collected in the lower portion of the inner wall of the cylindrical portion of the oil collecting member 30B and the upstream extending portion 34B is caused by the flow of air generated as the filter 10B rotates, and the lower portion of the inner wall of the cylindrical portion of the oil collecting member 30B. Or the upstream extension part 34B is rotated. Then, the oil OL at the bottom reaches the oil component guide opening 32B before going around at least once, and even if the oil OL is on the inner wall of the cylindrical portion, it eventually reaches the upstream extension portion 34B due to gravity. It can be recovered in the oil sump 31B via the guide opening 32B.

<Modification 3 of the first embodiment>
FIG. 12 shows a third modification of the oil collecting member in the first embodiment according to the present invention. The description overlapping with the first embodiment is omitted, and only different points will be described. The oil collecting member 30 </ b> C has an oil guiding opening 32 </ b> C that guides the oil to the oil reservoir 31. In the present modification, the oil content guide opening 32C is opened wider in the diameter direction than the second modification so as to be in contact with the side surface at the bottom of the oil collection member 30C.

  The oil OL collected in the lower part or bottom part of the side surface of the oil collecting member 30C rotates the lower part or bottom part of the side surface of the oil collecting member 30C by the flow of air generated as the filter 10 rotates. Then, the oil OL at the bottom reaches the oil guidance opening 32C before going around at least one turn, and even if the oil OL is on the side, it eventually reaches the bottom by gravity and passes through the oil guidance opening 32C. The oil can be collected in the oil reservoir 31.

<Second Example>
13 and 14 show a range hood 1D in the present embodiment according to the present invention. The description overlapping with the first embodiment is omitted, and only different points will be described. The hood part 80D of the range hood 1D has an inner surface panel 81D having a concave shape on the inner surface for collecting steam, oily smoke, etc. generated by cooking performed below. A mounting plate 50D is attached to the hood opening (not shown) so that there is no gap between the inner panel 81D and an air flow path.

  The mounting plate 50D is substantially rectangular in bottom view with a circular mounting plate opening 51D at the center. The mounting plate 50D has inclined portions having different widths so that when attached to the inner panel 81D, the mounting plate 50D is inclined downward from the front side to the back side. The width of the inclined portion on the front side is small, the width of the inclined portion on the back side is large, and the width of the inclined portion on the side surface side is increased from the front side to the back side. Due to the inclined portion around the mounting plate 50D, the lower surface of the mounting plate 50D is not horizontal, but is inclined downward from the front side to the back side. The rectifying plate 70D is attached so as to be substantially parallel to the inclination of the lower surface of the attachment plate 50D.

  On the back side of the mounting plate 50D (more precisely, the oil collecting bottom member 33D as will be described later), an oil collecting guide opening 32D is provided, and the mounting plate 50D covers the oil collecting guide opening 32D. An oil sump 31D is attached to the lower surface. As described above, since the oil collecting guide opening 32D and the oil reservoir 31D are provided at the lowest position on the back side, it becomes easy to collect the oil by gravity.

  However, as described in FIG. 9, the oil adhering to the oil collecting member 30D and the like is caused by the flow of air generated in the space between the filter 10D and the oil collecting member 30D and the like as the filter 10D rotates. The collected oil can be quickly guided to the oil sump and recovered without using gravity such as inclining the member, and without fixing the collected oil. Accordingly, it is not essential that the oil collecting guide opening 32D and the oil reservoir 31D are provided at the lowest position on the back side, but the oil that has reached the oil collecting guide opening 32D is further guided to the oil reservoir 31D. Is preferred. Note that the oil attached to the oil collecting member 30D and the like can be inclined upward as described above, and the oil collecting member 30D and the like can be rotated by the flow of air.

  FIG. 15 is an exploded perspective view of the filter unit 3D in the present embodiment (some members such as an electric motor are omitted). The mounting plate opening 51D is in the center of the mounting plate 50D. The oil collecting side portion 53D is formed so as to stand downstream from the mounting plate opening 51D. Since the mounting plate opening 51D is circular in plan view, the oil collecting side portion 53D forms a cylindrical side surface.

  The position of the filter 10D in front view (or side view) is above the lower surface of the mounting plate 50D, that is, on the downstream side of the air flow as compared with the first embodiment. Accordingly, the oil collecting side portion 53D is configured to surround the outer peripheral edge of the disk-shaped filter 10D.

  Further, the oil collecting member 30D having the same inner diameter as the cylindrical inner diameter of the oil collecting side portion 53D is combined with the mounting plate 50D so that the inner wall of the cylindrical portion of the oil collecting side portion 53D coincides, and the filter It is attached to the mounting plate 50 so as to substantially surround the lower part of the outer peripheral edge of 10D. The oil collecting member 30D includes an oil guiding opening 32D 'serving as an opening on the inner wall of the cylindrical portion, and is attached to the range hood 1D so that the oil guiding opening 32D' is located on the back side.

  The oil collecting bottom member 33D is attached so as to be in contact with the bottom of the oil collecting member 30D forming the cylindrical portion and to form a part of the bottom of the cylinder, and is attached to the oil collecting side portion 53D and the oil collecting member 30D. It becomes a saucer for oil that adheres and hangs down. The oil collecting bottom member 33D has an oil guiding opening 32D at a position that is the rearmost side and matches the oil guiding opening 32D 'of the oil collecting member 30D. The oil component guide opening 32D 'is provided on the inner wall of the cylindrical portion surrounding the filter 10D of the oil collecting member 30D over the entire height of the inner wall. Thereby, the oil component flowing through the inner surface of the oil component collecting member 30D can be reliably recovered by the swirling flow caused by the rotation of the filter 10D. The oil component opening 32D ′ of the oil collecting member 30D is an opening for guiding the oil adhering to the inner wall of the cylindrical part, whereas the oil guiding opening 32D of the oil collecting bottom member 33D is a cylindrical part. It is an opening part which guide | induces the oil component adhering to the oil content collection bottom member 33D which is the bottom part of this to oil sump 31D.

  FIG. 16 is a cross-sectional view of the vicinity of the filter unit in the present embodiment. The oil collecting side portion 53D that forms part of the mounting plate 50D surrounds the outer peripheral edge of the filter 10D. Further, the oil collecting member 30D having a L-shaped cross section in the diametrical direction has an oil collecting part of the mounting plate 50D so that the L-shaped vertical portion coincides with the inner wall of the cylindrical part of the oil collecting side part 53D. It is combined with the side portion 53D and substantially surrounds the lower part of the outer peripheral edge of the filter 10D. Since the oil collecting member 30D is securely attached below the oil collecting side portion 53D, the oil does not leak from between the two. The upper surface of the oil collecting bottom member 33D is in contact with the L-shaped side portion of the oil collecting member 30D, and the lower surface of the oil collecting bottom member 33D is attached so as to coincide with the lower surface of the mounting plate 50D. It is done.

  FIG. 17 is an enlarged cross-sectional view of the vicinity of the filter unit in the present embodiment. An oil component guide opening 32D 'serving as an opening on the inner wall of the side surface of the cylindrical portion and an oil component guide opening 32D serving as an opening on the bottom of the cylindrical portion are present at corresponding positions. Thereby, the swirl flow generated in the space between the filter 10D and the oil collecting side portion 53D and the oil collecting member 30D accompanying the rotation of the filter 10D by adhering to the oil collecting side portion 53D and the oil collecting member 30D. Thus, the collected oil can be quickly guided to the oil sump without being fixed and recovered.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Range opening 3 Filter unit 10 Filter 11 Hole 20 Electric motor 21 Motor rotating shaft 30 Oil collecting member 31 Oil sump 32 Oil component guide opening 33 Oil collecting bottom member 34 Upstream extending part 40 Electric motor attachment 41 Motor mounting hole 50 Mounting plate 51 Mounting plate opening 52 Downstream extending portion 53 Oil collecting side portion 60 Fan 61 Fan casing 62 Suction port 70 Rectifier plate 80 Hood portion 81 Inner surface panel 82 Blower box D Exhaust duct A Air flow OP oil content OL oil

Claims (12)

A fan that generates air flow,
A filter present on the upstream side of the fan on the air flow path and having a hole through which the air flow passes;
An electric motor for rotating the filter;
An oil content collecting member that surrounds the periphery of the filter and has an oil content induction opening that guides the oil content to the oil reservoir;
When the fan generates the air flow and the electric motor rotates the filter, the oil contained in the air is collected in the oil collecting member, and the oil collected in the oil collecting member A range hood that guides the oil sump through the oil guide opening by the movement of spiral air generated by rotation of the filter,
The range hood has a rotation speed per unit time of 230 rpm or more in order to generate the movement of the spiral air .   The range hood according to claim 1, wherein the filter has a disk shape, and a rotation shaft of the electric motor is attached to a center of the disk of the filter.   The range hood according to claim 1 or 2, wherein the oil content guide opening is provided in an inner wall of the oil content collection member surrounding the filter.   The range hood according to any one of claims 1 to 3, wherein the oil content guide opening is provided on an inner wall of the oil content collection member that surrounds the periphery of the filter over the entire height of the inner wall. .   The range hood according to any one of claims 1 to 4, further comprising an upstream extending portion extending inward from an inner wall of the oil collecting member at an upstream end portion of the oil collecting member. .   The range hood according to claim 5, wherein the oil content guide opening is provided in the upstream extension portion of the oil content collection member.   The range hood according to claim 6, wherein the oil content guide opening is provided in a portion that is the upstream extension and is in contact with the inner wall.   The range hood according to any one of claims 1 to 7, wherein an inner wall of the oil collecting member does not have corners.   The curvature of the inner wall of the oil collecting member surrounding the disk-shaped filter is composed only of a curvature that is not more than 10 times the curvature of the peripheral edge of the disk-shaped filter. Crab range hood.   The surface of the inner wall surrounding the periphery of the filter and / or the downstream surface of the upstream extension part of the oil collecting member has oil repellency. Range food.   The range hood according to any one of claims 1 to 10, further comprising a downstream extending portion extending inward from an inner wall of the oil collecting member at an end portion on the downstream side of the oil collecting member. .   The shortest distance between the downstream end of the oil collecting member surrounding the filter and the downstream disk surface of the filter is the upstream end of the oil collecting member and the upstream disk surface of the filter. The range hood according to any one of claims 2 to 11, wherein the range hood is equal to or longer than the shortest distance between the two.