CN115727376A

CN115727376A - Oil smoke collecting device, range hood and air cleaning device

Info

Publication number: CN115727376A
Application number: CN202211006278.0A
Authority: CN
Inventors: 阿部宽之; 渡边圭一; 岛田晃弘
Original assignee: Fuji Kogyo Co Ltd
Current assignee: Fuji Kogyo Co Ltd
Priority date: 2021-08-31
Filing date: 2022-08-22
Publication date: 2023-03-03
Also published as: JP7240764B1; JP2023041986A; TW202311679A; WO2023032509A1

Abstract

Provided are a soot trapping device, a smoke exhaust ventilator, and an air cleaning device, which use a method for improving the oil trapping efficiency based on a new principle. A soot trapping device includes a blower and a filter, the blower sucking air through the filter, the filter having a perforated portion provided with a plurality of holes and being rotated about a rotation axis by power, wherein when a surface on the blower side is a downstream side surface and a surface on the air suction side is an upstream side surface, a cross section of the holes obtained by cutting the perforated portion in a circumferential direction about the rotation axis becomes a space including at least a front edge in a rotation direction of the filter and a rear edge in the rotation direction of the filter, and one end of the upstream side surface behind the rotation direction is located on an opposite side of the other end of the downstream side surface in the rotation direction of the filter with respect to the cross section of at least a part of the holes, and the rotation direction is inclined.

Description

Oil smoke trapping device, range hood and air cleaning device

Technical Field

The present invention relates to a soot collection device, a range hood, and an air cleaning device that collect oil contained in soot in a factory, a kitchen, and the like.

Background

Conventionally, as in the range hood, there has been developed a device in which a filter is detachably provided on the suction upstream side of a suction fan to collect oil. For example, as in patent document 1, there is a range hood (oil trap) in which a filter is provided on the upstream side of a blower. In patent document 1, the filter is freely removable by placing four sides of the rectangular filter on partition plates attached to the inner surface of the hood. The filter is fixed and has the following difficulties: if the mesh size of the filter is made small in order to improve the oil trapping efficiency, the exhaust efficiency is lowered.

In recent years, in order to further improve the collection efficiency of a filter, as in patent document 2, the following means has been developed: air is sucked by a suction fan, a metal filter formed of a disc having a plurality of punched holes is positioned in an air flow path, and the metal filter is rotated by a motor to collect oil from the sucked air containing soot. This mechanism is applied as an oil trap device (including a range hood).

Patent document 1: japanese patent laid-open publication No. 4-3841

Patent document 2: japanese patent laid-open publication No. 2016-180530

In the oil trap device of patent document 2 in which the filter is rotated, although the oil trapping efficiency is higher than that of the fixed filter of patent document 1, it is desired to further improve the oil trapping efficiency.

Disclosure of Invention

The invention provides a soot trapping device, a range hood, and an air cleaning device, which adopt a method for improving oil trapping efficiency based on a new principle.

In order to solve the above problem, the present invention has the following configuration.

A soot trapping device includes a blower and a filter, the blower sucking air through the filter, the filter having a perforated portion provided with a plurality of holes and being rotated about a rotation axis by power, wherein when a surface on the blower side is a downstream side surface and an air sucking side is an upstream side surface, a cross section of the holes obtained by cutting the perforated portion in a circumferential direction about the rotation axis becomes a space including at least a front side in a rotation direction of the filter and a rear side in the rotation direction of the filter, and one end of the upstream side surface behind the rotation direction is located on an opposite side of the other end of the downstream side surface in the rotation direction of the filter with respect to the cross section of at least a part of the holes, and the rear side direction is inclined.

Drawings

Fig. 1 is a perspective view of the oil trap device (range hood) as viewed from the front.

Fig. 2 is an explanatory view of the oil trap device (hood). Fig. 2 (a) is a perspective view of the oil trap device (range hood) as viewed from below (upstream side/range side). Fig. 2 (B) is an exploded perspective view of fig. 2 (a). (enlarged view of a part of the member included.)

Fig. 3 is an explanatory view of the filter and guide vane unit.

Fig. 4 is an explanatory diagram of a relationship between the flow of air rectified by the blade portions and the rotation direction of the filter. Fig. 4 (a) is a perspective view showing the flow of air. Fig. 4 (B) is a plan view showing the flow of air as viewed from the upstream side.

Fig. 5 is an explanatory view of the hole (slit). Fig. 5 (a) is a plan view of the filter viewed from the upstream side. (the visible side is the lower surface of the filter.) an enlarged view within box B is included. Fig. 5 (B) is an enlarged perspective view of one hole (slit) in the frame a marked in fig. 5 (a) as viewed from below (upstream side/range side).

Fig. 6 is an explanatory view of the installation range of the guide vane. Fig. 6 (a-1) is a perspective view of the guide vane. Fig. 6 (a-2) is a perspective view of the guide vane showing only the vane portion without showing the attachment surface portion for the sake of explanation. Fig. 6 (B) is a plan view from the upstream side showing the mounting range of the guide vane of example 1. Fig. 6 (C) is a plan view showing the mounting range of the guide vane according to the modification of example 1, as viewed from the upstream side.

Fig. 7 is an explanatory view of oil trapping in the absence of the guide vane of embodiment 2. Fig. 7 (a) is a plan view as viewed from the upstream side of the filter. (including an enlarged view of a portion.) FIG. 7 (B) is a cross-sectional view taken between a-a, B-B, and c-c within a frame B indicated in FIG. 7 (A). Fig. 7 (B) is a sectional view of the outermost peripheral hole (slit) between a and a. Fig. 7 (B) is a cross-sectional view of the intermediate peripheral hole (slit) between B and B. Fig. 7 (B) is a cross-sectional view of the innermost peripheral hole (slit) between c and c.

Fig. 8 is an explanatory view of oil trapping in the presence of the guide vane of embodiment 2. Fig. 8 (a) is a plan view of the filter viewed from the upstream side. (including a partially enlarged view.) fig. 8 (B) is a cross-sectional view taken between a-a, B-B, and c-c within a frame B indicated in fig. 8 (a). Fig. 8 (B) (a) is a cross-sectional view of the outermost peripheral hole (slit) between a and a. Fig. 8 (b) is a cross-sectional view of the intermediate peripheral hole (slit) between b and b. Fig. 8 (c) is a cross-sectional view of the innermost peripheral hole (slit) between c and c.

Fig. 9 is a sectional view of a hole (slit). Fig. 9 (a) is a cross-sectional view of the filter in which the downstream-side opening width of the innermost peripheral hole (slit) is larger than the upstream-side opening width. Fig. 9 (B) is a cross-sectional view of the filter in which the downstream-side opening width of the innermost peripheral hole (slit) is smaller than the upstream-side opening width.

FIG. 10 is an explanatory view of embodiment 3. Fig. 10 (a) is a perspective view of the oil trap device (hood) as viewed from below (upstream side/range side). Fig. 10 (B) is a partially enlarged view of the guide vane attached to the oil receiving portion. (for the sake of explanation, the filter is not shown, and the guide vanes 4 are not shown).

Fig. 11 is an explanatory view of the angle of the guide vane. Fig. 11 (a) is a plan view of the oil trap device (hood) viewed from the upstream side. Fig. 11 (B) is a sectional view of the guide vane located between d and d indicated in fig. 11 (a).

Fig. 12 is an explanatory view of a guide vane unit of a three-dimensional shape. Fig. 12 (a) is a perspective view of mode 1. Fig. 12 (B) is a perspective view of the mode 2. Fig. 12 (C) is a perspective view of mode 3.

Description of the reference numerals

An oil capture device; a cover portion; 12.. A blower box body; an inner surface panel; a fairing plate; a fairing plate mounting hook; a filter; a rotating shaft; a hole (slit); 321.. A rotational direction rear wall; 3211.. After the direction of rotation; 3211D.. One end of the face on the upstream side; the other end of the downstream side face; a rotation direction front wall; 3221.. Rotating the direction front edge; an outermost peripheral aperture (slit); a middle perimeter hole (slit); an innermost peripheral hole (slit); a perforated portion; convex curvature; a face of an upstream side; a downstream side face; a guide vane; a guide vane mounting hole; a mounting member; a fastening member insertion hole; a guide vane unit; mounting a face; a blade portion; an edge on a downstream side; an upstream side edge; a side end; the other side end; an oil receiving portion; a gas exhaust duct; ms.. Movement speed; an outermost peripheral hole movement speed; the intermediate peripheral hole movement speed; ms3.. Innermost circumference hole moving speed; upstream side opening width; downstream side opening width; r.. The direction of rotation of the filter; a vector component in a direction opposite to the direction of rotation; rotating the axial vector component; v. flow of air through the guide vanes; a radial vector component; a flow of air toward the filter; flow of air intended to pass through a hole (slit); angle 1;

a second inclination angle; a 3 rd tilt angle.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings denote parts having the same functions, and overlapping descriptions in the drawings are appropriately omitted.

When the air suction flow path of the blower of the range hood is compared with the flow of a river, the blower sucks air and is located at the most downstream. The filter 3 is located upstream of the blower and the range is located further upstream of the filter 3.

In the present invention, the filter 3 can be provided in any one of the vertical direction, the oblique direction, and the horizontal direction. In the following embodiment, the filter 3 is horizontally disposed, and the blower, the filter 3, the guide vane 4, and the rectifying plate 14 are arranged in this order from above. Since the blower is located at the most downstream side of the air suction flow path as described above, the positional relationship is reversed from the direction of the air suction flow path. Here, the positional relationship is expressed as up, upside, upper side, or the like, and the air suction flow path is expressed as upstream.

The following embodiments reverse the upper and lower positions of the overall positional relationship with the upstream and downstream of the air suction flow path.

(example 1)

Fig. 1 is a perspective view of an oil collecting device (range hood) 1 according to embodiment 1 as viewed from the front. A blower, not shown, is mounted in the blower casing 12. The blower discharges air containing the sucked soot to the outside through the exhaust duct DU. The cover portion 11 collects air containing oil smoke generated from a cooking device such as a frying pan located below (upstream side) the cover portion 11.

Fig. 2 is an explanatory view of the oil collecting device (hood) 1. Fig. 2 (a) is a perspective view of the oil trap device (range hood) 1 as viewed from below (upstream side/range side). A rectifying plate 14 is attached to the stove side surface of the cover 11, and the cover 11 is covered with the rectifying plate 14. Fig. 2 (B) is an exploded perspective view of fig. 2 (a), including an enlarged view of a part of the members. An inner surface panel 13 is provided on the cover 11. A "1246767g" shaped current plate attaching hook 141 is attached to 4 positions on the outer peripheral side of the inner surface panel 13. The rectifying plate 14 is attached to the cover portion 11 by attaching an engaging member (not shown) to a surface (back surface in the drawing) on the downstream side of the rectifying plate 14 and engaging the engaging member with the rectifying plate attachment hook portion 141. The blower in the blower case 12 sucks air containing soot from the filter 3 and discharges the air to the outside through the exhaust duct DU. A gap through which air containing soot passes is provided between the attached flow rectification plate 14 and the inner surface panel 13, and air is sucked from the periphery of the attached flow rectification plate 14.

[ rotation of Filter ]

Fig. 3 is an explanatory diagram showing a positional relationship between the filter 3 and the guide vane 4, and the filter 3 is attached to the upstream side of the flow of the sucked air as viewed from the blower in the blower case 12. The positional relationship between the blower and the filter 3 is appropriate, and the blower may be present downstream of the filter 3. The filter 3 of example 1 is made of a metal material having a thickness of several millimeters. The filter 3 is preferably a non-deformable material, and in embodiment 1, a metal material is used. The material of the filter 3 may be a hard resin.

The filter 3 of example 1 is located at substantially the same position as the lower surface (the surface on the range side) of the cover portion 11, but is not coupled to the cover portion 11. In fig. 3, an upstream side face 33 (range side face) of the filter 3 is visible. Since the lower surface (the surface on the stove side) of the cover portion 11 is covered with the inner surface panel 13 except for the portion where the filter 3 is provided, air containing soot sucked by a blower (not shown) reliably passes through the filter 3. The filter 3 provided with the plurality of holes 32 is rotated at a high speed around the rotary shaft 31 by power (such as a motor) not shown, and collects the oil. The rotary shaft 31 of the filter 3 may be coupled to a rotary shaft of a fan that drives a blower, and the filter 3 may be rotated by a drive unit of the blower. The filter 3 may be rotated by a power different from that of the blower.

The filter 3 is provided with a plurality of holes (slits) 32, and a portion which appears black in fig. 3 is a porous portion 326. The oil collected and adhered by the holes (slits) 32 flows toward the outer peripheral side of the filter 3 by centrifugal force, and is retained in the oil receiving portion 5 surrounding the filter 3 from the periphery. Therefore, many holes 32 provided in the filter 3 are not clogged, and the filter 3 is cleaned with a very small frequency or without being cleaned. The rotation direction R of the filter 3 is not particularly limited, but in example 1, the filter 3 rotates clockwise when the filter 3 is viewed from below (upstream side).

[ porous portion ]

The porous portion 326 of the filter 3 will be described. When viewed from the upstream side (range side), the outer periphery of the filter 3 of example 1 has a portion blocked by the oil receiving portion 5. That is, the holes 32 of the blocked portion do not function as the filter 3. The porous portion 326 in the present invention is a portion functioning as the filter 3. When it is referred to as "the outer periphery of the porous portion 326", it means the outer periphery of a portion capable of functioning as the filter 3, and the portion of the filter 3 blocked by the oil receiving portion 5 is not included in the outer periphery.

[ guide vane mounting Member ]

Fig. 3 is an explanatory view of the filter 3 and the guide vane unit 43. In fig. 3, the related members of the guide vane unit 43 are shown slightly enlarged for the sake of explanation. A plurality of guide vanes 4 are attached to the attachment member 42 to become a guide vane unit 43. The guide vane unit 43 is attached to a surface on the downstream side of the rectifying plate 14 (the back surface of the rectifying plate 14 illustrated in fig. 2) by an appropriate method. In fig. 2, the guide vane 4 is shown as being separated from the mounting member 42, but in reality, the guide vane 4 is mounted to the mounting member 42 as shown in fig. 3. Further, the guide vane unit 43 can be freely attached and detached and can be easily cleaned.

Each guide vane 4 is formed of a plate bent in an L-shape as shown in the enlarged view. The L-shaped guide vane 4 is composed of a mounting surface portion 44 and a vane portion 45. The mounting surface portion 44 is a portion that abuts against the mounting member 42, and the guide vane mounting holes 41 are opened at 2 locations. The guide vane attachment hole 41 of the attachment surface portion 44 of the guide vane 4 is aligned with the fastening member insertion hole 421 provided in the attachment member 42. The mounting member 42 and the guide vane 4 are fastened and integrated by a fastening member, not shown, to form a guide vane unit 43.

As a modification in which the guide vane 4 is fixed to the mounting member 42 so as to be integrated therewith, welding may be performed. In this case, a positioning protrusion or a positioning recess is provided on the mounting surface portion 44 of the guide vane 4 instead of the guide vane mounting hole 41. The mounting member 42 is provided with a receiving portion that engages with the positioning projection or the positioning recess, instead of the fastening member insertion hole 421. The guide vane 4 positioned at the mounting member 42 is fixed by welding. As described later, the guide vane 4 is provided with a positioning projection and a positioning recess at a position where the orientation and position thereof are important, so that the manufacturing efficiency can be improved.

Further, the guide vane 4 may be detachably attached for easy cleaning.

In this way, the guide vane 4 can be fixed to the mounting member 42 by various methods.

In embodiment 1, the guide vane unit 43 is formed by attaching the guide vane 4 to the attachment member 42 and then these are attached to the downstream side surface of the rectifying plate 14 (the rear surface of the rectifying plate 14 shown in fig. 2), but the attachment member 42 may be omitted and the guide vane 4 may be directly attached to the downstream side surface (the rear surface) of the rectifying plate 14.

The guide vane 4 may be attached to any member as long as the member can support the guide vane 4. As will be described later, the guide vane 4 has a restriction that it has to be provided at a position directly below (arranged close to the upstream side) the filter 3. Therefore, it is preferably provided in a peripheral member of the filter 3. Examples thereof include the oil receiving portion 5 and the inner surface panel 13.

In any case, the guide vane 4 is provided upstream of the filter 3 in the air blowing flow path.

[ guide vanes ]

In the guide vane unit 43, the plurality of guide vanes 4 are attached to the attachment member 42 so as to describe a circle. The blade 45 stands vertically with respect to the mounting member 42. Reference numeral 31 illustrated in fig. 3 is a portion extending the rotary shaft 31 of the filter 3, and the guide vane 4 attached to the guide vane unit 43 is oriented not in the direction of the rotary shaft 31 but slightly inclined with respect to the radial direction.

Fig. 4 is an explanatory diagram of a relationship between the flow of air rectified by the blade 45 and the rotation direction R of the filter 3. Fig. 4 (a) is a perspective view showing the flow of air, and fig. 4 (B) is a plan view showing the flow of air as viewed from the upstream side.

As described above, the attachment surface portion 44 of the guide vane 4 is attached to the attachment member 42 to form the guide vane unit 43, and is fixed to the rectifying plate 14. The lower side (upstream side) of the filter 3 is covered with a flow rectification plate 14 (not shown), and air sucked from the periphery of the flow rectification plate 14 flows in the lateral direction through a gap between the flow rectification plate 14 and the inner surface panel 13. Then, it reaches the guide vane 4. Then, the air flowing in the lateral direction that has reached the guide vane 4 is rectified to the direction in which the vane portion 45 faces. The flow of air redirected and rectified by the blade 45 is the flow of air passing through the blade 45 and is indicated by an arrow labeled "V". Thereafter, the air changes its direction again, and is gradually sucked from the blade 45 toward the filter 3 on the downstream side.

In this way, the guide vane 4 is provided on the upstream surface 33 of the filter 3, and changes the flow of air.

The filter 3 shown in fig. 4B is an upstream surface (a surface on the stove side), and the guide vane 4 is provided further upstream in the air blowing flow path than the filter 3. The outer periphery of the filter 3 is shielded by the oil receiving portion 5 when viewed from the upstream side (range side). One end 455 of the blade portion 45 of the guide vane 4 is located outside the perforated portion 326, i.e., at the portion of the oil receiving portion 5. The blade portion 45 of the guide blade 4 includes: the other side end 456 located closer to the inner peripheral side of the hole 326 than the one side end 455 is oriented such that a straight line connecting the one side end 455 and the other side end 456 is as follows: the other side end 456 is shifted from the radial direction starting from the one side end 455 toward the opposite side of the rotation direction R of the filter 3.

In embodiment 1, the blade portions 45 of the guide blades 4 extend linearly, but the blade portions 45 may be curved. Even if the vane 45 is curved, it is not necessary that the vane 45 be linear as long as the straight line connecting the one end 455 and the other end 456 shifts the other end 456 from the radial direction starting from the one end 455 to the opposite side to the rotation direction R of the filter 3.

One end 455 of the vane 45 of example 1 is located in the oil receiving portion 5 except for the hole 326. However, the one end 455 may be located near the outer periphery of the porous portion 326, and in this case, the one end 455 is not covered with the blade 45 in a part of the outer periphery of the filter 3.

As described above, the entire guide vane 4 is inclined in the direction opposite to the rotation direction R of the filter 3, and does not face the direction (radial direction) of the rotation shaft 31. The guide vane 4 is inclined at a 1 st inclination angle θ with respect to the radial direction in a direction opposite to the rotation direction R of the filter 3. The radial direction serving as a reference is shown as a vector component N in the radial direction. Reference symbol "V" in the drawing indicates a direction of flow of air passing through the guide vane 4, which is a direction in which the blade portion 45 extends. The 1 st inclination angle θ is also the difference between the vector component N in the radial direction and the angle of the flow V of the air passing through the guide vane 4.

When the flow V of the air passing through the guide vane 4 is resolved into a radial direction and a normal direction of the rotation direction R, the flow V includes a vector component RV directed opposite to the rotation direction R of the filter 3 due to the influence of the 1 st inclination angle θ.

The guide vane 4 is provided upstream of the filter 3, changes the flow of air, and has a flow straightening function.

[ Effect of guide vanes ]

The power of the filter 3 can be various, but is preferably a motor. The higher the rotation speed (angular velocity) of the filter 3, the higher the oil trapping efficiency. However, since electric power is required for rotating at a relatively high rotation speed (angular velocity), and a high-performance motor that satisfies the performance requirements such as a relatively high rotation speed (angular velocity) needs to be prepared, the cost increases.

In embodiment 1, in order to solve this problem, the guide vane 4 is provided on the lower surface side (range side) of the filter 3. The blade portion 45 of the guide vane 4 is inclined at the 1 st inclination angle θ in the direction opposite to the rotation direction R with respect to the radial direction. Thereby, the flow V of the air passing through the guide vane 4 includes a vector component RV in the direction opposite to the rotation direction R of the filter 3. As described in the following [ the number and angle of the guide vanes ], the oil collecting operation from the oil smoke collected oil is performed by the oil smoke colliding against the rotation direction rear wall 321 of the hole (slit) 32, becoming oil and adhering thereto. The flow V of the air passing through the guide vane 4 includes a vector component RV in the direction opposite to the rotation direction R of the filter 3, the vector component being a component toward the rotation direction rear wall 321 of the hole (slit) 32. The flow V of the air passing through the guide vane substantially brings about an effect of increasing the rotational speed (angular velocity) of the filter 3. The vector component RV opposite to the rotation direction R of the filter 3 is a component toward the rotation direction rear wall 321, and accordingly, air collides against the rotation direction rear wall 321, thereby improving the oil trapping efficiency.

In this way, the guide vane 4 generates a flow of air including a vector component RV in a direction opposite to the rotation direction R of the filter 3, thereby exerting an action equivalent to increasing the rotation speed (angular velocity) of the filter 3. The performance can be improved only by providing the guide vanes 4 in the conventional oil collecting device.

[ number and Direction of guide vanes ]

The guide vanes 4 face in a direction shifted from the rotary shaft 31. The direction (the 1 st inclination angle θ) of the guide vane 4 is preferably a direction orthogonal to the angle of the rotating direction rear wall 321 of the hole (slit) 32, but may actually be changed according to the flow velocity of the air sucked by the blower and the rotation speed (angular velocity) of the filter 3. Further, the shape of the hole 32 and the direction of the hole (slit) 32 may be changed. It is obvious that the optimization of the direction of the guide vanes 4 is included in the scope of the present invention. Further, the flow straightening performance is improved by increasing the number of guide vanes 4, but the air resistance is also increased. The number can be optimized appropriately. When determining the number and angle of the guide vanes 4, optimization by experiment or simulation is preferably performed.

[ planar shape of hole of Filter ]

Fig. 5 is an explanatory view of the hole (slit) 32, and members not required for explanation are not illustrated. Fig. 5 (a) is a plan view of the filter 3 viewed from the upstream side, and the visible surface is the lower surface (range-side surface) of the filter 3. Fig. 5 (B) is an enlarged perspective view of the hole (slit) 32 in the frame a indicated in fig. 5 (a) as viewed from the upstream side (range side). When the filter 3 is viewed from below (the range side), the rotation direction R of the filter 3 is clockwise. Air sucked by the blower passes through the holes (slits) 32 of the rotating filter 3, and the air is sucked from below (upstream) where the oven is present to above (downstream) where the blower is present. N denotes the radial vector component. The radial vector component N is a radial flow toward the rotation shaft 31. The rotation direction rear wall 321 of the hole (slit) 32 travels toward the passing air due to the rotation of the filter 3, and is hit by the soot contained in the air, and the oil adheres thereto. As is clear from this principle, the oil adheres to the rotation direction rear wall 321 on the opposite side to the direction of the rotation direction R. The longer the rotation direction rear wall 321 to which oil adheres, the more the oil trapping efficiency improves. The shape of the aperture 32 can be varied.

As shown in an enlarged view of a frame B in fig. 5 a, the filter 3 has a hole 326, and as the hole (slit) 32, an outermost peripheral hole (slit) 323, an intermediate peripheral hole (slit) 324, and an innermost peripheral hole (slit) 325 are provided. All the holes (slits) 32 are provided with convex curved portions 327 curved convexly in the rotation direction R. In fig. 5 (B) which is an enlarged view of one hole (slit) 32 included in the frame a, the presence of the convex curved portion 327 is illustrated more easily.

When the holes (slits) 32 having the convex curved portions 327 are arranged in line, the filter 3 looks like a spiral pattern as shown in fig. 4 (a).

The holes 32 may be circular and may have any shape, but are preferably slits extending from the outer periphery to the inner periphery of the filter 3. Further, if the holes (slits) 32 are formed as slits of the convex curved portion 327 as shown in fig. 5 (B), the length of the rotating direction rear wall 321 contributing to oil trapping can be made longer than the linear holes (slits) 32 provided in the radial direction, which is preferable. Further, the angle between the flow V of the air passing through the guide vane 4 and the direction of the wall surface of the rotational direction rear wall 321 becomes closer to 90 °, the more efficiently the air containing oil collides with the rotational direction rear wall 321. In order to make the angle approach 90 °, the hole (slit) 32 of example 1 is a convex curved portion 327 which is convexly curved in the rotation direction R of the filter 3 as shown in fig. 5 (B).

[ installation Range of guide vanes in embodiment 1 ]

Fig. 6 is an explanatory view of the installation range of the guide vane 4, and fig. 6 (a-1) is a perspective view of the guide vane 4. As illustrated in fig. 6 (a-1), the guide vane 4 is disposed such that the mounting surface portion 44 is positioned downward (toward the rectifying plate 14), and the downstream side edge 451 of the vane portion 45 faces the filter 3. Fig. 6 (a-2) is a perspective view of the guide vane 4 showing only the blade portion 45 without showing the mounting surface portion 44 for the sake of explanation.

Fig. 6 (B) is a plan view of the mounting range of the guide vane 4 of example 1 as viewed from the upstream side, and the mounting surface portion 44 is not shown for the sake of explanation. Most of the blade portions 45 provided with the plurality of guide blades 4 are located outside the oil receiving portion 5 located outside the filter 3. That is, the one side end 455 is located at a position separated outward from the outermost periphery of the porous portion 326 in a plan view as viewed from the upstream side, and the other side end 456 is located on the inner periphery side of the filter 3.

Since one end 455 of blade 45 is positioned outside perforated portion 326, the air flowing toward filter 3 passes through blade 45 and is rectified before reaching perforated portion 326. According to this mode, the air containing the vector component in the direction opposite to the rotation direction R of the filter 3 is excellently rectified and flows into the filter 3.

Fig. 6 (B) also shows the following example: the other end 456 of the guide vane 4 is located on the outer circumferential side of the innermost circumference of the porous portion 326 of the filter 3, and the one end 455 is located on the outer circumferential side of the filter 3, such that the innermost circumference of the porous portion 326 is not covered by the guide vane, when viewed from the upstream side.

By the action of the guide vane 4, air containing a vector component in the direction opposite to the rotation direction R of the filter 3 flows into the outermost peripheral hole (slit) 323 and the intermediate peripheral hole (slit) 324. The guide vane 4 does not extend to the innermost circumferential hole (slit) 325 of the filter 3 in a plan view as viewed from the upstream side, but the air rectified is ejected from the other end 456 of the guide vane 4 toward the innermost circumferential hole (slit) 325, becomes a swirling flow, and flows into the innermost circumferential hole (slit) 325.

The guide vanes 4 have a flow straightening effect but at the same time become air resistance. Further, since the noise source may be generated, it is preferable that the shorter the length is, the better the noise source is. The example in which the innermost circumference side of the perforated portion 326 is not covered with the guide vane shows a case in which the guide vane 4 can be shortened as necessary. In addition, the cleaning performance is improved because the guide vanes are shortened. If the length of the guide vane 4 is shortened, it is preferable to cover about half of the hole 326.

(modification 1 of embodiment 1)

[ installation range of guide vanes in embodiment 1 ]

Since the flow rectification plate 14 covers the right below (upstream side) of the filter 3, the air toward the blade portions 45 of the guide vanes 4 is restricted to pass through the gap between the flow rectification plate 14 and the inner surface panel 13. In embodiment 1, the flow V of air passing through the guide vane 4 flows from the outer peripheral side toward the inner peripheral side, and the remaining air not sucked into the outermost peripheral hole (slit) 323 and the intermediate peripheral hole (slit) 324 flows into the innermost peripheral hole (slit) 325. Further, since the guide vane 4 changes the direction of the air flow and has air resistance, the flow rate and the flow velocity of the air are necessarily reduced in the region where the guide vane 4 is present, as compared with the case where the guide vane 4 is not present.

Fig. 6 (C) is a plan view showing the mounting range of the guide vane 4 in modification 1 of example 1, as viewed from the upstream side. The outermost peripheral hole (slit) 323 has an advantage that the oil trapping efficiency is higher than that of the other holes (slits) 32 because the outermost peripheral hole (slit) moving speed MS1 is high regardless of the presence or absence of the guide vane 4.

In consideration of the reduction in the flow rate and the flow velocity of the air by the guide vane 4, modification 1 is a case where the guide vane 4 is intentionally not provided directly below (on the upstream side of) the outermost peripheral hole (slit) 323, and the guide vane 4 is provided directly below (on the upstream side of) the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325, which are poor in oil trapping efficiency.

In order to obtain such modification 1, the guide vane has the following configuration.

When viewed from the upstream side, one side end 455 is located closer to the inner peripheral side than the outermost periphery of the porous portion 326 of the filter 3, and the other side end 456 is located closer to the inner peripheral side of the filter 3 than the one side end 455, so that the outermost periphery of the porous portion 326 is not covered with the guide vane 4.

The guide vane 4 is positioned directly below (on the upstream side of) the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325, and therefore the intermediate peripheral hole (slit) moving speed MS2 and the innermost peripheral hole (slit) moving speed MS3 are slower than the outermost peripheral hole (slit) moving speed MS1. However, the intermediate peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325 generate a flow of air having a vector component RV in a direction opposite to the rotation direction R of the filter 3 due to the action of the guide vanes 4, and the air passes through the intermediate peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325, so that the oil collection efficiency is increased at these holes (slits) 32 having poor collection efficiency.

Although the above description has been made using the regions of the slits such as the outermost peripheral hole (slit) 323, the intermediate peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325, the one end 455 may be positioned in the middle of the outermost peripheral hole (slit) 323, and the one end 455 may be positioned in the middle of the intermediate peripheral hole (slit).

In modification 1, the hole (slit) 32 is divided into two holes (slits) including the outermost peripheral hole (slit) 323, the intermediate peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325, but the hole (slit) 32 may be a continuous single hole (slit). In this case, the one-side end 455 of the guide vane 4 may be placed midway through one continuous hole (slit) 32.

The number of the divided peripheral holes (slits) may be 4 or more. In particular, since the filter 3 may have a large diameter in a large-sized oil trap device, it is sometimes preferable to increase the number of divisions.

Modification 1 is also an example in which the guide vane 4 can be shortened, and shows a case in which the guide vane 4 can be shortened as necessary. In addition, the cleaning performance is improved by shortening the guide vane.

[ summary of example 1 ]

Example 1 is a preferred embodiment including the rectifying plate 14.

Examples include the following.

The oil collecting device 1 includes a blower that sucks air through the filter 3, a filter 3, and a guide vane 4, and the filter 3 is a member having a hole 326 provided with a plurality of holes 32 and rotates around the rotary shaft 31 by power. The guide vane 4 is provided on the upstream surface 33 of the filter 3, changes the flow of air, and the flow of air passing through the guide vane 4 includes a vector component in the direction opposite to the rotation direction R of the filter 3.

In addition, example 1 includes the following modes of the oil trap device 1.

The oil trap device 1 includes a blower which sucks air through the filter 3, a guide vane 4, and a rectifying plate 14.

The filter 3 is a member having a hole 326 provided with a plurality of holes 32, and rotates around the rotary shaft 31 due to power, and the rectifying plate 14 covers the upstream side of the guide vane 4. The guide vane 4 is provided on the upstream surface 33 of the filter 3, and has one side end 455 and the other side end 456, the one side end 455 being located near the outer periphery of the porous portion 326 or outside the porous portion 326, and the other side end 456 being located closer to the inner periphery of the filter 3 than the one side end 455. The straight line connecting the one side end 455 and the other side end 456 is oriented as follows: the other side end 456 is shifted from the radial direction starting from the one side end 455 toward the opposite side of the rotation direction R of the filter 3.

(example 2)

[ Cross-sectional shape of pores of Filter ]

As shown in fig. 5B, each hole (slit) 32 is a space including at least a rotation direction front wall 322 and a rotation direction rear wall 321. When the hole 32 is circular in plan view, the front periphery in the rotation direction R is a rotation direction front wall 322, and the rear periphery in the rotation direction R is a rotation direction rear wall 321. The air containing soot passing through each hole (slit) 32 collides with the rotation direction rear wall 321 by the rotation of the filter 3, and oil is trapped, as described above.

Fig. 7 is an explanatory view of oil trapping in the absence of the guide vanes of embodiment 2. Fig. 7 (a) is a plan view of the filter 3 viewed from the upstream side thereof, and includes an enlarged view of a frame B shown in the drawing. The filter 3 of example 2 includes a hole 326, and the hole 326 includes an outermost peripheral hole (slit) 323, an intermediate peripheral hole (slit) 324, and an innermost peripheral hole (slit) 325 from the outer peripheral side. The larger the total area of the holes (slits) 32 provided in the porous portion 326 is, the lower the air resistance passing through the filter 3 is, but the lower the physical strength of the filter 3 is. The arrangement and area of the holes (slits) 32 included in the perforated portion 326 are determined in consideration of the strength, air resistance, and the like of the filter 3. All the holes (slits) 32 have the same rotational speed (angular velocity), but the outermost hole movement velocity MS1 becomes the highest velocity because the distance from the rotational axis 31 increases toward the outer periphery. Therefore, the outermost peripheral hole (slit) 323 has the highest oil trapping efficiency.

However, the intermediate peripheral hole movement speed MS2 and the innermost peripheral hole movement speed MS3 in the vicinity of the rotation shaft 31 are lower than the outermost peripheral hole movement speed MS1, and therefore the oil trapping efficiency is worse than the outermost peripheral hole (slit) 323.

Here, the oil trapping efficiency is improved by devising the shape of the rotation direction rear wall 321 (rotation direction rear side 3211 in the cross-sectional view) of the holes (slits) 32 that contribute to oil trapping.

The blower sucks air through the filter 3, and the filter 3 is a member having a hole 326 provided with a plurality of holes (slits) 32 and rotates around the rotary shaft 31 by power, which is the same as in embodiment 1.

FIG. 7B is a cross-sectional view taken between a-a, B-B, and c-c within a frame B shown in FIG. 7A. Fig. 7 (B) is a sectional view of the outermost peripheral hole (slit) 323 between a and a, fig. 7 (B) is a sectional view of the intermediate peripheral hole (slit) 324 between B and B, and fig. 7 (B) is a sectional view of the innermost peripheral hole (slit) 325 between c and c. These sectional views show the cross section of the hole (slit) 32 of the filter 3 when cut in the circumferential direction around the rotation axis 31.

[ Effect of example 2 in the absence of guide vanes ]

The cross section of the hole (slit) 32 of the filter 3 is a space including the rotation direction rear side 3211 and the rotation direction front side 3221 regardless of the presence or absence of the guide vane. This space serves as a flow path through which air containing soot passes through the filter 3. The rotation direction rear side 3211 has one end 3211D of the upstream surface 33 (the range-side surface) and the other end 3211U of the downstream surface 34 (the blower-side surface).

See the middle circumference of (B) of FIG. 7A cross section of the hole (slit) 324 and a cross section of the innermost peripheral hole (slit) 325 in fig. 7 (B) and (c). The rotation direction rear side 3211 has one end 3211D of the upstream side surface 33 (range side surface) and the other end 3211U of the downstream side surface 34 (blower side surface), and unlike the conventional type, the one end 3211D of the upstream side surface 33 is located on the opposite side of the rotation direction R of the filter 3 from the other end 3211U of the downstream side surface 34, and therefore, the rotation direction rear side 3211 is inclined. This tilt will be referred to as "the tilt" hereinafter. If the inclination is expressed as the 2 nd inclination angle

Then 0 DEG < 2 nd inclination angle

This case is example 2. In contrast, in (a) of (B) of fig. 7 of the conventional type, the 2 nd inclination angle

Becomes 90 deg..

The flow of air without the rectifying plate 14 becomes a flow of air including a vector component a in the direction of the rotating shaft 31 from the upstream side to the downstream side, and is drawn in by passing through the hole (slit) 32.

At this time, since the filter 3 rotates at a high speed in the rotation direction R, the flow of air containing the vector component a in the rotation axis direction hits a rotation direction rear side 3211 shown in the vertical direction in the drawing, that is, a rotation direction rear side 3211 of the rotation direction rear wall 321, and the oil is collected by the rotation direction rear wall 321. Fig. 7 (B) (a) shows this state, and is a conventional hole (slit) 32. In other words, in the conventional type, the oil is collected mainly by the rotation of the filter 3. In example 2, since the outermost peripheral hole moving speed MS1 is the highest speed and the oil trapping efficiency of the outermost peripheral hole (slit) 323 is the highest, the conventional hole (slit) 32 in which the inclination is not intentionally provided in the outermost peripheral hole (slit) 323 is adopted.

In (a) of (B) of FIG. 7 of the prior art, the 2 nd inclination angle of the inclination

Since the angle is 90 °, as shown in the figure, the direction including the rotation direction rear side 3211 of the rotation direction rear wall 321 is parallel to the direction of the flow of the air of the vector component a in the direction of the rotation axis 31 through which the hole (slit) passes. When the filter 3 rotates in the rotation direction R, air containing soot collides against the rotation direction rear wall 321, and the oil is collected.

On the other hand, the intermediate peripheral hole (slit) 324 of fig. 7 (B) and the innermost peripheral hole (slit) 325 of fig. 7 (c) of example 2 both have this inclination. The air passing through the hole (slit) and including the vector component a in the direction of the rotation axis 31 flows toward the rotation direction rear side 3211 where it collides with the rotation direction rear wall 321.

The sucked air is deflected by the inclination when passing through the hole (slit) 32. The oil droplets have a larger mass than air and therefore have a larger inertial force than air. Therefore, even if the flow of the air is reversed, the fine oil droplets contained in the oil smoke are caused to travel straight by the inertial force and collide with the inclined rotation direction rear side 3211 (rotation direction rear wall 321). This inclination contributes to an increase in oil trapping efficiency.

In addition, if the inclination angle is set as the 2 nd inclination angle

Then 2 nd inclination angle

The rotation direction rear side 3211 is longer the smaller is than 90 °. This corresponds to an increase in the area of the rotation direction rear wall 321 which becomes the oil trapping surface, and the oil trapping efficiency is improved.

The outermost peripheral hole (slit) 323 has the highest outermost peripheral hole movement speed MS1, and the oil trapping efficiency is high even if this inclination is not provided. The intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 have a moving speed MS lower than the outermost peripheral hole moving speed MS1, and the oil trapping efficiency is poor. This inclination improves the oil trapping efficiency of the rotation direction rear wall 321, and can compensate for the small moving speed MS. This inclination compensation can contribute to uniformity of the oil trapping efficiency of the entire filter 3 due to the difference in the oil trapping efficiency (difference in the moving speed MS) caused by the difference in the distance between the hole (slit) 32 and the rotation shaft 31.

In example 2, since the effect of oil trapping by the inclination is added in addition to the effect of oil trapping by the rotation of the filter 3 in the rotation direction R, the oil trapping efficiency is improved.

In example 2, the middle peripheral hole (slit) 324 in fig. 7 (B), the rotation direction rear side 3211 and the rotation direction front side 3221 of the innermost peripheral hole (slit) 325 in fig. 7 (c) are substantially parallel to each other, and form a parallelogram space. This allows air passing through the hole (slit) 32 to flow smoothly.

[ synergistic action with guide vanes ]

Fig. 8 is an explanatory diagram of oil trapping in the presence of the guide vane 4 of embodiment 2. Fig. 8 (a) is a plan view (including an enlarged view of a part) of the filter 3 viewed from the upstream side.

FIG. 8B is a cross-sectional view taken between a-a, B-B, and c-c within a frame B shown in FIG. 8A.

Fig. 8 (B) is a sectional view of the outermost peripheral hole (slit) 323 between a and a, (B) of fig. 8 is a sectional view of the intermediate peripheral hole (slit) 324 between B and B, and (c) of fig. 8 is a sectional view of the innermost peripheral hole (slit) 325 between c and c. The shape of the holes (slits) of the filter 3 in all the drawings is the same as that in each of fig. 7 (B), but differs only in that the guide vanes 4 of embodiment 1 are provided.

As described in embodiment 1, the flow V of the air passing through the guide vane 4 includes the vector component RV in the direction opposite to the rotation direction R of the filter 3. On the other hand, the flow of the air sucked through the outermost peripheral hole (slit) 323, the intermediate peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325 includes a vector component a in the direction of the rotary shaft 31 from the upstream side to the downstream side.

By combining the two vector components, the flow T of air to pass through the holes (slits) 32 is directed toward the rotation direction rear side 3211. This causes the air containing soot to collide with the rotation direction rear wall 321, thereby increasing the collection efficiency.

On the other hand, the inclination is not provided in the outermost peripheral hole (slit) 323 in (a) of fig. 8 (B). On the other hand, the rotation direction rear side 3211 of the intermediate peripheral hole (slit) 324 in fig. 8 (B) and the innermost peripheral hole (slit) 325 in fig. 8 (B) and (c) has this inclination.

( Note: the "inclination" refers to the inclination of the rotation direction rear side 3211 caused by the presence of the one end 3211D of the upstream side surface 33 (the range side surface) and the other end 3211U of the downstream side surface 34 (the blower side surface) of the rotation direction rear side 3211, and the one end 3211D of the upstream side surface 33 being located on the opposite side of the rotation direction R of the filter 3 from the other end 3211U of the downstream side surface 34, as described above. )

Due to this inclination, the oil trapping efficiency in the rotation direction rear side 3211 of the intermediate peripheral hole (slit) 324 in fig. 8 (B) and the innermost peripheral hole (slit) 325 in fig. 8 (B) (c) becomes high as described above [ action in the absence of guide vanes ]. By providing the guide vane 4, the flow V of air passing through the guide vane 4 has a vector component RV opposite to the rotation direction R. In the system in which the guide vanes 4 are provided, in addition to the effect based on the inclination, the effect of generating the vector component RV in the opposite direction by the guide vanes 4 is added.

As described above, the guide vane 4 and the inclined hole (slit) 32 produce a synergistic effect.

[ summary of the Effect of this inclination of example 2 ]

The sucked air is deflected due to the inclination while passing through the hole (slit) 32. The oil droplets have a larger mass than air, so the inertia force is larger than air. Therefore, although the air turns, the oil droplets run straight by the inertial force, collide against the rotation direction rear side 3211 (rotation direction rear wall 321) of the inclined holes (slits) 32, and are easily attached.

In addition, if the inclination angle is set as the 2 nd inclination angle

Then 2 nd inclination angle

The smaller the angle is than 90 °, the longer the rotation direction rear side 3211 is. This corresponds to an increase in the area of the rotation direction rear wall 321 which becomes the oil trapping surface, and the oil trapping efficiency is improved.

The design of providing this inclination at the rotation direction rear side 3211 (rotation direction rear wall 321) of embodiment 2 described above is based on a principle different from the improvement of the oil trapping efficiency by the guide vanes 4, and the oil trapping efficiency is improved regardless of the presence or absence of the guide vanes 4.

In example 2 described so far, the inclination is not provided in the outermost peripheral hole (slit) 323. On the other hand, the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 are configured such that the 2 nd inclination angle is set for each of the peripheral holes (slits) as the peripheral hole approaches the rotation shaft 31

As the length decreases, the length from one end 3211D to the other end 3321U of the rotation direction rear side 3211 increases. The filter 3 has a uniform and high oil collecting efficiency because the difference in oil collecting efficiency is small in the portion from the outermost peripheral hole (slit) 323 to the innermost peripheral hole (slit) 325.

As described above, in

embodiment

2, 3 kinds of peripheral holes (slits) are used from the outermost peripheral hole (slit) 323 to the innermost peripheral hole (slit) 325 depending on the distance from the rotation shaft 31. In addition, the rotation direction rear sides 3211 of the outermost peripheral holes (slits) 323 are all at the same 2 nd inclination angle

The rear sides 3211 in the rotation direction of the intermediate peripheral holes (slits) 324 are all at the same 2 nd inclination angle

The rotation direction rear sides 3211 of the innermost circumferential holes (slits) 325 all have the same 2 nd inclination angle

In other words, the 2 nd inclination angle

Each peripheral hole (slit) is at the same angle to form

The manner of (2) is varied in stages.

As a modification, the 2 nd inclination angle may be set

Continuously varying according to the distance from the rotation axis 31. In this case, in one hole (slit) 32, the 2 nd inclination angle

But also as a function of distance from the axis of rotation.

In addition, the 2 nd inclination angle of all the holes (slits) 32 may be set

All the same regardless of their position.

The inclination causes the air passing through the holes (slits) 32 to bend in the direction, and the air resistance increases, so that the flow velocity decreases and the flow rate decreases. Therefore, in these regions, even if the intermediate peripheral hole movement speed MS2 and the innermost peripheral hole movement speed MS3 are slower than the outermost peripheral hole movement speed MS1, the oil trapping efficiency is increased.

On the other hand, the outermost peripheral hole (slit) 323, which has the highest oil trapping efficiency, is not provided with this inclination, and air flows from the lower surface (upstream/stove side) to the upper surface (downstream/blower side) of the filter 3 without resistance. The flow velocity and flow rate of the air passing through the outermost peripheral hole (slit) 323 are higher than those of the inclined intermediate peripheral hole (slit) 324 and innermost peripheral hole (slit) 325. The flow rate passing through the outermost peripheral holes (slits) 323 having the highest oil trapping efficiency is increased, and therefore, the characteristics of the outermost peripheral holes (slits) 323 can be fully exhibited.

The hole (slit) 32 configured as described above preferably exists from the inner peripheral side to the outer peripheral side of the hole portion 326, and the inclination of the rotation direction trailing edge 3211 of the rotation direction rear wall 321 is inclined at the 2 nd inclination angle as going to the outer peripheral side of the hole portion 326

Close to vertical.

Note that, at least some of the holes (slits) 32 need only have the inclination, and all of the holes (slits) 32 need not have the inclination.

In embodiment 2, the inclination is not provided in the rotation direction rear wall 321 (rotation direction rear side 3211) of the outermost peripheral hole (slit) 323, but it goes without saying that the inclination may be provided. In this case, the characteristics of the outermost peripheral hole (slit) 323 having high oil trapping efficiency can be further improved. In particular, when a cyclone blower is used, air sucked in a vortex shape is sucked, and most of the air is sucked through the outermost peripheral hole (slit) 323. In order to sufficiently trap the oil, it is preferable to provide the inclination in the outermost peripheral hole (slit) 323.

In one hole (slit) 32, the inclination of the rotation direction rear side 3211 may be changed continuously or in stages depending on the position from the rotation axis 31.

As described above, in embodiment 2, the filter 3 is devised, and the air blower and the filter 3 are provided, the air blower sucking air through the filter 3, and the filter 3 is a member having the perforated portion 326 provided with the plurality of holes (slits) 32. When the filter 3 is rotated around the rotary shaft 31 by power and the surface on the blower side is the downstream side surface 34 and the surface on the air intake side is the upstream side surface 33, the cross section of the hole 32 that cuts the hole part 326 in the circumferential direction becomes a space including at least the rotation direction front side 3221 and the rotation direction rear side 3211 of the filter 3. In the cross section of at least a part of the hole 32, one end 3211D of the upstream surface 33 of the rotation direction rear side 3211 is located on the opposite side of the other end 3211U of the downstream surface 34 in the rotation direction R of the filter 3, and the rotation direction rear side 3211 is inclined.

[ opening width of hole (slit) ]

Fig. 9 is a sectional view of the hole (slit) 32, which is a sectional view corresponding to a position between c and c in fig. 7 (a). Fig. 9 (a) is a cross-sectional view of a filter in which the downstream opening width OW2 of the innermost circumferential holes (slits) 325 is larger than the upstream opening width OW1, and fig. 9 (B) is a cross-sectional view of a filter 3 in which the downstream opening width OW2 of the innermost circumferential holes (slits) 325 is smaller than the upstream opening width OW1.

Comparing the mode of fig. 9 (a) with the mode of fig. 9 (B), fig. 9 (a) is more advantageous in terms of oil collecting efficiency. This is because the downstream side opening width OW2, which is an outlet of air, is large, and thus the turning of air passing through the hole (slit) 32 becomes large.

In addition, the filter 3 having the downstream-side opening width OW2 or the upstream-side opening width OW1 increased in width is more likely to reach the deep part of the hole (slit) 32 by a cleaning tool such as a brush than the filter 3 having the same downstream-side opening width OW2 and upstream-side opening width OW1, and thus the cleaning performance is improved.

(example 3)

Embodiment 3 is an example of the oil collecting device (hood) 1 without the rectifying plate 14.

Fig. 10 is an explanatory view of embodiment 3, and fig. 10 (a) is a perspective view of the oil collecting device (hood) 1 as viewed from below (upstream side/range side). Fig. 10 (B) is a partially enlarged view of the guide vane 4 attached to the oil receiving portion (the filter 3 is not shown for the sake of explanation, and the plurality of guide vanes 4 are not shown). Fig. 11 is an explanatory view of the angle of the guide vane 4, fig. 11 (a) is a plan view as viewed from the upstream side of the oil collecting device (hood) 1, and fig. 11 (B) is a cross-sectional view of the guide vane 4 between d and d indicated in fig. 11 (a).

The filter 3 is surrounded by the oil receiving portion 5. Each guide vane 4 is composed of a mounting surface portion 44 and a vane portion 45. The guide vane 4 has the mounting surface portion 44 mounted to the oil receiving portion 5 to form the guide vane unit 43 as a whole, so that the guide vane 4 can be removed even when the oil receiving portion 5 is removed for cleaning or the like. Therefore, the cleaning property becomes high.

The oil trap device (range hood) 1 of example 3 does not have the flow regulating plate 14, and does not block the flow of air sucked under the filter 3 (upstream side/range side). Therefore, the air flows toward the filter in the vertical direction from a position on the range side directly below (upstream side) the filter 3. Further, the flow of air in the vertical direction toward the upper side (downstream side) can also be generated in embodiment 1 in which the rectifying plate 14 is present, but is generated more significantly than in embodiment 1 in embodiment 3 in which the rectifying plate 14 is not present.

As shown in fig. 10 (a) and 11 (a), the guide vane 4 extends from the outer peripheral side to the inner peripheral side of the filter 3 in the direction of the rotary shaft 31. The extending direction of the guide vanes 4 is different from the extending direction of the guide vanes 4 of embodiment 1.

Embodiment 3 includes a blower, a filter 3, and a guide vane 4, and the blower sucks air through the filter 3. The filter 3 is a member having a hole 326 provided with a plurality of holes (slits) 32, and is rotated about the rotary shaft 31 by power. As shown in fig. 10 (B) and 11 (B), the guide vane 4 is provided upstream of the filter 3 in the air flow path, has a side 451 on the downstream side close to the filter 3, and has a side 452 on the upstream side facing the downstream side 451 and farther from the downstream side 451 than the filter 3.

The upstream side 452 is located closer to the rotation direction R of the filter 3 than the downstream side 451 is, and is, the oil trap device (hood) 1.

Fig. 11 (B) is a sectional view of the guide vane 4 between d and d indicated in fig. 11 (a). The guide vane 4 is bent toward the rotation direction R of the filter 3 at a portion of the downstream side 451 connecting the rectangular attachment surface portion 44 and the vane portion 45. The air flow F from the stove (not shown) toward the filter 3 is directed straight toward the filter 3 from below (stove side), but is redirected by the portion where the guide vane 4 is present, and is guided in the direction of the air flow V passing through the guide vane 4. The blade 45 is inclined at a 3 rd inclination angle δ of 90 ° or less with respect to the upstream surface 33 of the filter 3 by positioning the upstream side 452 closer to the rotation direction R of the filter 3 than the downstream side 451.

Thereby, the flow V of the air passing through the guide vane 4 includes a vector component RV in the direction opposite to the rotation direction R of the filter 3.

[ inclination of guide vanes ]

The 3 rd inclination angle δ does not need to be the same at all positions of the vane 45, and may be changed from the outer peripheral side to the inner peripheral side of the filter 3.

As described above, the filter 3 has a higher moving speed MS on the outer peripheral side than on the inner peripheral side, and the oil trapping efficiency is higher on the outer peripheral side. By making the 3 rd inclination angle δ smaller as it approaches the inner peripheral side, the oil trapping efficiency by the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 can be improved by tilting the vane portion 45 toward the filter 3.

This makes it possible to equalize the oil collection efficiency from the outer peripheral side to the inner peripheral side.

In order to exhibit the performance of the outermost peripheral hole (slit) 323 having the highest oil trapping efficiency, the 3 rd inclination angle δ of the guide vane 4 positioned in the outermost peripheral hole (slit) 323 may be vertical. With this configuration, in the region of the outermost peripheral hole (slit) 323, the air resistance of the guide vane 4 is reduced, the flow rate of air is increased, and the oil trapping efficiency can be improved.

On the other hand, the angle of inclination of the blade 45 in the region of the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 from the upstream side 452 toward the downstream side 451 increases toward the inner peripheral side. This generates a flow of air containing a large amount of vector component RV in the direction opposite to the rotation direction R of the filter 3, thereby improving the oil trapping efficiency. At the same time, the direction of the flow of the sucked air changes, and therefore, the air resistance increases, and the flow rate and the flow velocity of the air passing through the holes (slits) 32 decrease. In these regions, even if the moving speed MS is the intermediate peripheral hole moving speed MS2 and the innermost peripheral hole moving speed MS3 which are slower than the outermost peripheral hole (slit) 323, the oil trapping efficiency is improved.

[ curving of guide vanes ]

The blade portions 45 may be curved from the upstream side toward the downstream side. The blade 45 may be bent so that the vicinity of the upstream side 452 is perpendicular to the upstream surface 33 of the filter 3, and the 3 rd inclination angle δ may be smaller as the side 451 is closer to the downstream side. The air sucked from the upstream side where the cooking range is present gradually changes its direction with the curvature of the blade portions 45, and thus can be smoothly rectified.

[ summary of example 3 ]

In example 3, the oil collecting device 1 is preferable not to be provided with the flow regulating plate 14, but the flow regulating plate 14 is not prevented from being provided even by the guide vane 4 of example 3.

The oil trap device 1 includes a blower, a filter 3, and a guide vane 4. The blower sucks air through the filter 3, and the filter 3 is a member having a hole 326 provided with a plurality of holes 32 and rotates around the rotating shaft 31 by power. The guide vane 4 is provided on the upstream surface 33 of the filter 3, and has a downstream side 451 and an upstream side 452. The downstream side 451 is a side close to the filter 3, and the upstream side 452 is a side facing the downstream side 451 and located farther from the downstream side 451 than the filter 3. The upstream side 452 is located closer to the rotation direction R of the filter 3 than the downstream side 451.

(example 4)

Embodiment 4 is an example in which a guide vane unit 43 having a plurality of vane portions 45 formed integrally as a guide vane 4 is used. The same applies to the manner of using the current plate 14 as in example 1. Fig. 12 is an explanatory view of the guide vane unit 43 of a three-dimensional shape. Fig. 12 (a) to 12 (C) are perspective views of modes 1 to 3. The three-dimensional shape can be formed by various methods, but is preferably formed by a press machine because punching productivity is high.

In embodiment 1 of fig. 12 (a), the guide vane unit 43 is formed of a thin plate having an annular shape. The area of the ring is in the shape of an angular continuous wave. The hole in the middle is a portion where the filter 3 is located, and the guide vane unit 43 is attached so as to surround the filter 3. The angular wavy portion serves as a blade portion 45, and air is sucked from both the lower side (range side) and the upper side (filter side) of the thin plate. The flow V of air passing through the guide vane 4 includes a vector component RV in the direction opposite to the rotation direction R of the filter 3.

Mode 2 in fig. 12 (B) is an example in which the blade 45 is curved. The width of the annular ring of the guide vane unit 43 is very large, and the vane portions 45 are curved, so that the flow V of the air passing through the guide vanes 4 can be rectified to be almost opposite to the rotation direction R of the filter 3 as shown in the drawing. The relative velocity of the air flow is almost the velocity obtained by adding the angular velocity of the filter 3 to the velocity of the air flow V passing through the guide vane 4. Is a way in which the function of the guide vanes 4 is significantly improved.

As described above, the blade portion 45 of the guide vane 4 does not need to be a member for rectifying the air flow into a straight line, and may be a member for bending the air flow.

Mode 3 of fig. 12 (C) is a modification of mode 1, and a mounting surface portion 44 is formed by integral molding below (on the range side) the guide vane unit 43. The mounting surface portion 44 can be mounted on the rear surface of the rectifying plate 14.

(modification 2)

In modification 2, various aspects included in the present invention will be described.

Since oil of the soot adheres to the guide vane 4, the guide vane 4 is preferably detachably attached. For example, the fixing may be performed by a detachable method such as a magnet. In the case where the guide vanes 4 are configured to be detachable one by one, in order to determine the direction of the guide vanes 4, it is possible to appropriately make a trouble by preparing a receiving portion or the like at a mark of an installation position or an installation position.

In addition, the mounting method is arbitrary. For example, the guide vane 4 may be welded to the peripheral member of the filter 3.

The guide vane 4 of the present invention can be applied to various types of blowers, and peripheral members of the filter 3 also vary depending on the type of the blower. It is needless to say that various modes such as a mode in which only the flow rectification plates 14 are provided and the inner surface panel 13 is not present, a mode in which the inner surface panel 13 is present and the flow rectification plates 14 are not present, and the like are included in the present invention in order to reduce costs.

In the case of a hood-type range hood as disclosed in patent document 1, for example, the peripheral member of the filter 3 to which the guide vanes 4 are attached may be a partition plate. In embodiments 1 to 4, the range hood is described as an example, but the present invention can also be applied to an air cleaner or the like having an oil trapping function, and in some cases, peripheral members specific to an air cleaner not present in the range hood may be present, and the guide vanes 4 may be attached to the members.

The peripheral member to which the guide vane 4 of the present invention is attached includes a member to which the guide vane 4 can be attached via a bracket or the like, and is not limited to a member located close to the filter 3.

In embodiments 1 to 4, a range hood is described as the oil collecting device 1. In the range hood, the exhaust gas is discharged to the outside, but an air cleaning device of a type circulating indoors is also included in the present invention. How the exhaust is changed is not relevant to the essence of the invention.

While the embodiments of the present invention such as the examples and the modifications have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and design changes and the like without departing from the scope of the present invention are also included in the present invention.

In addition, the above-described embodiments can be combined by following the techniques thereof as long as the objects, structures, and the like are not particularly contradictory or problematic.

Claims

1. An oil fume collecting device is characterized in that,

comprises a blower and a filter, wherein the blower is arranged in the filter,

the blower sucks in air through the filter,

in the case of the filter, it is preferred that,

is a member having a hole part provided with a plurality of holes and rotating around a rotating shaft by power,

when the surface of the blower side is set as the downstream side surface and the side of the sucked air is set as the upstream side surface,

a cross section of the hole obtained by cutting the perforated portion in a circumferential direction around the rotation axis is a space including at least a front edge in a rotation direction of the filter and a rear edge in the rotation direction of the filter,

in the cross section of at least a part of the holes, one end of the upstream surface on the rear side in the rotation direction is located on the opposite side of the rotation direction of the filter from the other end of the downstream surface, and the rear side in the rotation direction is inclined.

2. The soot trapping device of claim 1,

the rotational direction front edge is substantially parallel to the rotational direction rear edge.

3. The fume collecting device according to claim 1 or 2,

the hole is present from the inner peripheral side to the outer peripheral side of the porous portion, and the inclination of the rear side in the rotation direction is closer to vertical as going toward the outer peripheral side of the porous portion.

4. The fume collecting device according to any one of claims 1 to 3,

the inclination of the rear side in the rotational direction of the hole located at the outermost periphery of the holed portion becomes vertical.

5. A range hood is characterized in that a range hood body,

the soot trapping device according to any one of claims 1 to 4.

6. An air cleaning device is characterized in that,

the cooking fume trapping device according to any one of claims 1 to 4.