JP2023041986A - Oil collection device - Google Patents

Abstract

To provide means for improving oil collection efficiency, which is based on a novel principle.SOLUTION: An oil smoke collection device comprises a blower and a filter. The blower suctions air through the filter. The filter is a member having a porous part where a plurality of holes are provided, and is rotated with power around a rotation axis. When defining the surface of the filter on a blower side as a downstream surface and the surface on an air-suctioning side as an upstream surface, cross-sections of the holes taken by cutting the porous part in the circumferential direction as centered on the rotational axis are spaces that at least include a front side of the filer in the rotation direction and a rear side of the filer in the rotation direction. In the cross-sections of at least a part of the holes, one end of the upstream side surface on the rear side in the rotation direction is on the opposite side in the rotation direction of the filter from the other end of the downstream surface, and the rear side in the rotation direction is slanted.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present invention relates to an oil collector for collecting oil contained in soot from factories, kitchens, and the like.

Conventionally, as seen in range hoods, devices have been developed that collect oil by providing a detachable filter on the suction upstream side of a suction fan. For example, there is a range hood (oil collecting device) in which a filter is provided on the upstream side of the blower as in Patent Document 1. In Patent Literature 1, the four sides of a rectangular filter are placed on a partition plate attached to the inner surface of the cooker hood so that the filter can be removed. The filter is a fixed type, and if the mesh of the filter is made finer in order to increase the oil collection efficiency, there is a problem that the exhaust efficiency decreases.
In recent years, in order to further improve the collection efficiency of the filter, as in Patent Document 2, air is sucked by a suction fan, and a metal filter made of a disc having a plurality of punched holes is positioned on the air flow path. A mechanism was developed to collect oil from the air containing oily smoke that was drawn in by rotating it with a motor. This mechanism has found application as an oil collector (including range hoods).

JP-A-4-3841 JP 2016-180530 A

Although the oil collector disclosed in Patent Document 2, which rotates the filter, has higher oil collection efficiency than the stationary filter described in Patent Document 1, it has been desired to further improve the oil collection efficiency.

An object of the present invention is to provide means for improving oil collection efficiency based on a new principle.

In order to deal with such problems, the present invention has the following configurations.
A blower and a filter are provided, wherein the blower sucks air through the filter, and the filter is a member having a perforated portion provided with a plurality of holes, and is rotated around a rotation axis by power. and a cross section of the hole obtained by cutting the perforated portion in a circumferential direction around the rotation shaft, where the surface on the blower side is the downstream side and the air sucking side is the upstream side. is a space including at least the front side of the filter in the rotation direction and the rear side of the filter in the rotation direction, and the cross section of at least some of the holes is one end of the upstream side surface of the rear side in the rotation direction. is on the opposite side in the rotational direction of the filter from the other end of the downstream side surface, and the rear side in the rotational direction is inclined.

The perspective view which looked at the oil collection apparatus (range hood) from the front. Explanatory drawing of an oil collector (range hood). (A) The perspective view which looked at the oil collection apparatus (range hood) from the bottom (upstream side, stove side). (B) An exploded perspective view of FIG. 2(A). (Including enlarged views of some members.) Explanatory drawing of a filter and a guide vane unit. FIG. 5 is an explanatory diagram of the relationship between the flow of air rectified by the vane portion and the rotation direction of the filter; (A) The perspective view which showed the flow of air. (B) Plan view from upstream showing air flow. Explanatory drawing of a hole (slit). (A) Plan view seen from upstream of the filter. (The visible face is the bottom face of the filter.) Including enlarged view in box B. (B) An enlarged perspective view of one hole (slit) in the frame A attached to FIG. Explanatory drawing of the attachment range of a guide vane. (A-1) Perspective view of a guide vane. (A-2) A perspective view of the guide vane, in which only the vane portion is shown and the mounting surface portion is not shown for explanation. (B) A plan view seen from the upstream side, showing the mounting range of the guide vanes of the first embodiment. (C) A plan view seen from the upstream, which shows the installation range of the guide vane of the modified example of the first embodiment. FIG. 11 is an explanatory diagram of oil collection when there is no guide vane in Example 2; (A) Plan view seen from upstream of the filter. (Including a partially enlarged view.) (B) Cross-sectional views between aa, bb, and cc in frame B attached to FIG. 7(A). (a) is a sectional view of the outermost peripheral hole (slit) between aa. (b) is a cross-sectional view of an intermediate peripheral hole (slit) between bb. (c) is a sectional view of the innermost peripheral hole (slit) between cc. FIG. 4 is an explanatory diagram of oil collection when there is the guide vane of Example 2; (A) Plan view seen from upstream of the filter. (Partially enlarged view is included.) (B) Cross-sectional views between aa, bb, and cc in frame B attached to FIG. 8(A). (a) is a sectional view of the outermost peripheral hole (slit) between aa. (b) is a cross-sectional view of an intermediate peripheral hole (slit) between bb. (c) is a sectional view of the innermost peripheral hole (slit) between cc. Sectional drawing of a hole (slit). (A) Cross-sectional view of a filter in which the downstream side opening width of the innermost peripheral hole (slit) is larger than the upstream side opening width. (B) Cross-sectional view of a filter in which the downstream side opening width of the innermost peripheral hole (slit) is smaller than the upstream side opening width. Explanatory drawing of Example 3. FIG. (A) The perspective view which looked at the oil collection apparatus (range hood) from the bottom (upstream side, stove side). (B) Partially enlarged view of the guide vane attached to the oil pan. (For the sake of illustration, the filter is not shown and some guide vanes 4 are not shown). Explanatory drawing of the angle of a guide vane. (A) The top view seen from the upstream of the oil collector (range hood). (B) A cross-sectional view of the guide vane between dd in FIG. 11(A). Explanatory drawing of the three-dimensionally shaped guide vane unit. (A) Perspective view of embodiment 1. FIG. (B) Perspective view of aspect 2. FIG. (C) Perspective view of mode 3. FIG.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals in different figures denote portions having the same function, and duplication of description in each figure will be omitted as appropriate.

If the air suction flow path of the blower of the range hood is likened to the flow of a river, the blower sucks air and is located at the most downstream position. The filter 3 is upstream from the blower, and the stove is further upstream from the filter 3.
In the present invention, the filter 3 can be installed vertically, diagonally, or horizontally. In the following embodiments, the filter 3 is provided horizontally, and the blower, the filter 3, the guide vanes 4, and the current plate 14 are arranged in this order from the top. Since the blower is located most downstream of the air suction channel as described above, the positional relationship and the direction of the air suction channel are reversed. Therefore, when referring to the positional relationship, it is expressed as above, above, above, etc., and when referring to the air suction flow path, it is expressed as upstream.
In all of the following examples, the positional relationship is reversed above and below, and upstream and downstream of the air suction flow path.

(Example 1)
FIG. 1 is a front perspective view of an oil collecting device (range hood) 1 according to Embodiment 1. FIG. A blower (not shown) is mounted in the blower box 12 . The air blower exhausts the sucked air containing oily smoke to the outside through the exhaust duct DU. The hood portion 11 collects air containing greasy smoke generated from cooking utensils such as a frying pan located below (upstream side) of the hood portion 11 .

FIG. 2 is an explanatory diagram of the oil collector (range hood) 1. FIG. FIG. 2(A) is a perspective view of the oil collecting device (range hood) 1 viewed from below (upstream side/stove side). A current plate 14 is attached to the stove side surface of the hood portion 11 so as to cover the hood portion 11 . FIG. 2(B) is an exploded perspective view of FIG. 2(A), including enlarged views of some members. The hood portion 11 is provided with an inner panel 13 . U-shaped current plate mounting hooks 141 are attached at four locations on the outer peripheral side of the inner panel 13 . The rectifying plate 14 has an engaging member (not shown) attached to the downstream side surface (the back surface in the drawing) of the rectifying plate 14 . can be attached to The blower in the blower box 12 sucks air containing oily smoke from the filter 3 and exhausts the air to the outside through the exhaust duct DU. Between the installed rectifying plate 14 and the inner panel 13, there is a gap through which the air containing oily smoke passes, and the air is sucked from the four circumferences of the attached rectifying plate 14.例文帳に追加

[Rotate filter]
FIG. 3 illustrates the positional relationship between the filter 3 and the guide vanes 4, and the filter 3 is attached upstream of the flow of air to be sucked when viewed from the blower in the blower box 12. As shown in FIG. The positional relationship between the blower and the filter 3 is arbitrary, and it is sufficient if the blower is downstream of the filter 3 . The filter 3 of Example 1 is made of a metal material with a thickness of several millimeters. It is preferable that the filter 3 is made of a material that does not deform, and in the first embodiment, a metal material is used. The material of the filter 3 may be hard resin.

The filter 3 of Example 1 is located at substantially the same position as the lower surface of the hood portion 11 (side surface of the stove), but is not connected to the hood portion 11 . In FIG. 3, the upstream side surface 33 (stove side surface) of the filter 3 is visible. Since the lower surface (stove side surface) of the hood portion 11 is covered with the inner surface panel 13 except for the portion where the filter 3 is provided, the air containing oily smoke sucked in by a blower (not shown) is reliably removed by the filter 3. pass through. The filter 3 provided with a large number of holes 32 rotates at high speed around a rotating shaft 31 by a power (motor or the like) (not shown) to collect oil. The rotation shaft 31 of the filter 3 may be connected to a rotation shaft for driving the fan of the blower, and the filter 3 may be rotated by the drive section of the blower. Moreover, the filter 3 may be rotated by a power different from that of the blower.

A large number of holes (slits) 32 are provided in the filter 3 , and the portion that looks black in FIG. The oil collected and adhered to the holes (slits) 32 flows toward the outer periphery of the filter 3 due to centrifugal force and accumulates in the oil pan 5 surrounding the filter 3 . Therefore, the many holes 32 provided in the filter 3 are not clogged, and the frequency of cleaning the filter 3 is remarkably reduced, or cleaning becomes unnecessary. Although the rotation direction R of the filter 3 is not particularly limited, in the first embodiment, the filter 3 rotates clockwise when viewed from below (upstream side).

[Porous part]
The perforated portion 326 of the filter 3 will be described. The outer periphery of the filter 3 of Example 1 has a portion hidden by the oil receiver 5 when viewed from the upstream side (stove side). That is, the hole 32 in the hidden portion does not function as the filter 3 . The perforated portion 326 as used in the present invention refers to a portion that functions as the filter 3 . The term "outer circumference of the perforated portion 326" refers to the outer circumference of the portion that can function as the filter 3, and the portion of the filter 3 hidden by the oil pan 5 is not included in this outer circumference.

[Guide vane mounting member]
FIG. 3 is an explanatory diagram of the filter 3 and the guide vane unit 43. FIG. FIG. 3 shows the members related to the guide vane unit 43 slightly enlarged for explanation. A large number of guide vanes 4 are attached to an attachment member 42 to form a guide vane unit 43 . The guide vane unit 43 is attached to the downstream side surface of the rectifying plate 14 (the back surface of the rectifying plate 14 shown in FIG. 2) by appropriate means. Although the guide vanes 4 and the mounting member 42 are shown separated in FIG. 2, the guide vanes 4 are actually mounted to the mounting member 42 as shown in FIG. It is also possible to make the guide vane unit 43 detachable for easy cleaning.

Each guide vane 4 is composed of an L-shaped bent plate 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 on the mounting member 42, and is provided with guide vane mounting holes 41 at two locations. The guide vane mounting hole 41 of the mounting surface portion 44 of the guide vane 4 is aligned with the fastening member insertion hole 421 drilled in the mounting member 42 . The mounting member 42 and the guide vane 4 are then fastened together by a fastening member (not shown) to form a guide vane unit 43 .

As a modified example of fixing and integrating the guide vane 4 to the mounting member 42, welding can also be used. In that case, the mounting surface portion 44 of the guide vane 4 is provided with a positioning projection or a positioning recess instead of the guide vane mounting hole 41 . Instead of the fastening member insertion hole 421, the mounting member 42 is provided with a receiving portion that fits into the positioning protrusion or the positioning recess. The guide vanes 4 positioned on the mounting member 42 are fixed by welding. As will be described later, the direction and position of the guide vanes 4 are important, and by providing positioning projections and positioning recesses, the manufacturing work efficiency can be improved.
Additionally, the guide vanes 4 may be removably mounted to facilitate cleaning.
Thus, fixing the guide vanes 4 to the mounting members 42 can be done by various means.

In the first embodiment, the guide vanes 4 are attached to the mounting member 42 to form the guide vane unit 43, and then attached to the downstream side surface of the rectifying plate 14 (the back surface of the rectifying plate 14 illustrated in FIG. 2). The member 42 may be omitted and the guide vane 4 may be directly attached to the downstream side surface (back surface) of the current plate 14 .
Further, the guide vanes 4 may be attached to any member that can support them. As will be described later, the guide vane 4 has a positional restriction that must be provided directly below the filter 3 (arranged close to the upstream side). Therefore, it is preferable to be provided on the peripheral member of the filter 3 . For example, the oil pan 5, the inner panel 13, and the like are included.
In any case, the guide vanes 4 are provided upstream of the air flow path from the filter 3 .

[Guide vane]
A plurality of guide vanes 4 are attached to the attachment member 42 in the guide vane unit 43 so as to draw a circle. The vane portion 45 rises vertically with respect to the mounting member 42 . The reference numeral 31 shown in FIG. 3 is an extension of the rotating shaft 31 of the filter 3, and the direction of the guide vanes 4 attached to the guide vane unit 43 does not face the direction of the rotating shaft 31, and the radius Slightly slanted from the direction

FIG. 4 is an explanatory diagram of the relationship between the flow of air rectified by the vane portion 45 and the rotation direction R of the filter 3. As shown in FIG. FIG. 4A is a perspective view showing the flow of air, and FIG. 4B is a plan view showing the flow of air from the upstream side.
As described above, the mounting surface portion 44 of the guide vane 4 is mounted on the mounting member 42 to form the guide vane unit 43 and is fixed to the current plate 14 . The bottom (upstream side) of the filter 3 is covered with a rectifying plate 14 (not shown), and the air sucked from the four circumferences of the rectifying plate 14 flows through the gap between the rectifying plate 14 and the inner panel 13 in the lateral direction. flow to Then, it reaches the guide vane 4 . Next, the laterally flowing air that has reached the guide vanes 4 is rectified in the direction in which the vane portions 45 face. The flow of air that is redirected and rectified by vane section 45 is indicated by the arrow labeled "V" for air flow through vane section 45. FIG. After that, the air changes direction again and is sucked from the vane portion 45 toward the filter 3 on the downstream side.

Thus, the guide vanes 4 are provided on the upstream side surface 33 of the filter 3 and change the flow of air.

The filter 3 shown in FIG. 4B is the upstream side surface (stove side surface), and the guide vanes 4 are provided upstream of the filter 3 in the air flow path. The outer periphery of the filter 3 is hidden by the oil receiver 5 when viewed from the upstream side (stove side). One side end 455 of the vane portion 45 of the guide vane 4 is located outside the perforated portion 326 , that is, in the oil pan 5 portion. In addition, the vane portion 45 of the guide vane 4 has the other side end 456 located on the inner peripheral side of the perforated portion 326 from the one side end 455, and a straight line connecting the one side end 455 and the other side end 456 is , the other side end 456 is shifted in the direction opposite to the rotation direction R of the filter 3 with respect to the radial direction starting from the one side end 455 .

In Example 1, the vane portion 45 of the guide vane 4 extends linearly, but the vane portion 45 may be curved. Even if the vane portion 45 is curved, the straight line connecting the one side end 455 and the other side end 456 is arranged such that the other side end 456 is opposite to the rotation direction R of the filter 3 with respect to the radial direction starting from the one side end 455 . It is not necessary for the vane portion 45 to be straight, as long as it is shifted to the side.

Furthermore, one side end 455 of the vane portion 45 of Example 1 was positioned in the oil receiver 5 outside the perforated portion 326 . However, the one side end 455 may be in the vicinity of the outer periphery of the perforated portion 326 , and in this case, the one side end 455 is in a state in which a part of the outer periphery of the filter 3 is not covered with the vane portion 45 .

As described above, the guide vanes 4 are wholly inclined in the direction opposite to the rotation direction R of the filter 3 and are not oriented in the direction of the rotation shaft 31 (radial direction). The guide vanes 4 are inclined in a direction opposite to the rotation direction R of the filter 3 only at a first inclination angle θ with respect to the radial direction. The reference radial direction is shown as the radial vector component N. FIG. The symbol "V" in the drawing indicates the direction of air flow through the guide vanes 4, which is the direction in which the vane portions 45 extend. The first inclination angle θ is also the angular difference between the radial vector component N and the air flow V through the guide vanes 4 .
When the air flow V passing through the guide vanes 4 is vector-decomposed into the radial direction and the normal direction of the rotational direction R, it contains a vector component RV in the direction opposite to the rotational direction R of the filter 3 due to the influence of the first inclination angle θ. become.
The guide vanes 4 are provided on the upstream side of the filter 3 to change the flow of air and have a rectifying function.

[Action of Guide Vane]
The power of the filter 3 can vary, but a motor is preferred. The faster the rotation speed (angular speed) of the filter 3, the more the oil collection efficiency improves. However, rotating at a high rotational speed (angular speed) requires electric power, and it becomes necessary to prepare a high-performance motor that satisfies the required performance of a high rotational speed (angular speed), resulting in an increase in cost.

In the first embodiment, in order to solve this problem, the guide vanes 4 are installed on the lower surface side (stove side) of the filter 3 . The vane portion 45 of the guide vane 4 is inclined in a direction opposite to the rotational direction R by a first inclination angle θ with respect to the radial direction. As a result, the airflow V that has passed through the guide vanes 4 includes a vector component RV in the direction opposite to the rotational direction R of the filter 3 . As will be described later in [Number and Angle of Guide Vane], the collection of oil from the soot is caused by the oil soot hitting the rotation-direction rear wall 321 of the hole (slit) 32 and adhering to it as oil. The air flow V through the guide vanes 4 includes a vector component RV in the direction opposite to the rotational direction R of the filter 3 , which vector component is directed toward the rotationally rear wall 321 of the hole (slit) 32 . The air flow V that has passed through the guide vanes has the effect of substantially increasing the rotation speed (angular speed) of the filter 3 . The vector component RV in the direction opposite to the rotational direction R of the filter 3 is a component directed toward the rotational direction rear wall 321, and air hits the rotational direction rear wall 321 accordingly, increasing the oil collection efficiency.

In this way, the guide vanes 4 create an air flow containing a vector component RV in the direction opposite to the rotational direction R of the filter 3, thereby achieving the same effect as increasing the rotational speed (angular speed) of the filter 3. Bring. The performance can be improved by simply providing the guide vanes 4 to the existing oil collecting device.

[Number and orientation of guide vanes]
The guide vanes 4 are oriented in a direction deviated from the rotating shaft 31 . The orientation of the guide vanes 4 (the first inclination angle θ) is preferably in a direction perpendicular to the angle of the rotational direction rear wall 321 of the hole (slit) 32 , but in practice the flow velocity of the air sucked by the blower and the flow rate of the filter 3 are different. It can change depending on the rotational speed (angular velocity). Also, the shape of the hole 32 and the direction of the hole (slit) 32 may change. It goes without saying that optimization of the orientation of the guide vanes 4 is included in the scope of the present invention. Further, when the number of guide vanes 4 is increased, rectification performance is improved, but at the same time air resistance is increased. Optimization of the number of sheets can also be done as appropriate. In determining the number and angle of the guide vanes 4, it is a preferable aspect to perform optimization through experiments and simulations.

[Planar shape of filter pores]
FIG. 5 is an explanatory diagram of the hole (slit) 32, and members unnecessary for explanation are not shown. FIG. 5A is a plan view of the filter 3 viewed from the upstream side, and the visible surface is the lower surface of the filter 3 (side surface of the stove). FIG. 5(B) is an enlarged perspective view of the hole (slit) 32 in the frame A attached to FIG. 5(A) viewed from the upstream side (stove side). The rotation direction R of the filter 3 is clockwise when the filter 3 is viewed from below (from the stove side). 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 stove is located to above (downstream) where the blower is located. N indicates a radial vector component. The radial vector component N is the radial flow towards the axis of rotation 31 . Since the rotation direction rear wall 321 of the hole (slit) 32 advances toward the passing air due to the rotation of the filter 3, the oily smoke contained in the air is hit and adheres to the oil. As can be seen from this principle, the oil adheres to the rotational direction rear wall 321 on the opposite side of the rotational direction R. The oil collection efficiency improves as the rotation direction rear wall 321 to which the oil adheres is longer. The shape of the holes 32 can vary.

As shown in the enlarged view of frame B in FIG. ) 324 and an innermost peripheral hole (slit) 325 are provided. Each of the holes (slits) 32 has a convexly curved portion 327 that is convexly curved in the rotational direction R. As shown in FIG. In FIG. 5B, 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 clearly.

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

The hole 32 may be round or of any shape, but is preferably a slit extending from the outer periphery to the inner periphery of the filter 3 . Further, if the hole (slit) 32 is formed as a slit of the convex curved portion 327 as shown in FIG. This is preferable because the length of the directional rear wall 321 can be increased. Further, as the angle between the air flow V passing through the guide vanes 4 and the direction of the wall surface of the rotation direction rear wall 321 approaches 90°, the oil-containing air efficiently hits the rotation direction rear wall 321 . In order to bring the angle close to 90°, the hole (slit) 32 of Example 1 has a convex curved portion 327 that is convexly curved in the rotation direction R of the filter 3 as shown in FIG. 5B.

[Mounting Range of Guide Vane in Embodiment 1]
6A and 6B are explanatory diagrams of the mounting range of the guide vanes 4, and FIG. 6A-1 is a perspective view of the guide vanes 4. FIG. As illustrated in FIG. 6A-1, the guide vane 4 is arranged so that the mounting surface portion 44 faces downward (toward the current plate 14 side) and the downstream side 451 of the vane portion 45 faces the filter 3. be done. FIG. 6A-2 is a perspective view of the guide vane 4 showing only the vane 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 vanes 4 of the first embodiment as seen from the upstream side, and the mounting surface portion 44 is not shown for the sake of explanation. Most of the vane portions 45 of the plurality of guide vanes 4 are located outside the oil receiver 5 outside the filter 3 . That is, the one side end 455 is located outside the outermost periphery of the perforated portion 326 in plan view from the upstream side, and the other side end 456 is located on the inner peripheral side of the filter 3 .
Since one side end 455 of the vane portion 45 is positioned outside the perforated portion 326, the air flowing toward the filter 3 is rectified by the vane portion 45 before reaching the perforated portion 326. . With this aspect, the air containing vector components in the opposite direction to the rotation direction R of the filter 3 is cleanly rectified and flows into the filter 3 .

6B, the other side end 456 of the guide vane 4 is located outside the innermost circumference of the perforated portion 326 of the filter 3 in plan view from the upstream side, and the one side end 455 is , the innermost peripheral side of the perforated portion 326 is not covered with the guide vanes by being positioned on the outer peripheral side of the filter 3 from the other side end 456.
Due to the action of the guide vanes 4 , air containing vector components in the direction opposite to the rotational direction R of the filter 3 flows into the outermost peripheral hole (slit) 323 and the intermediate peripheral hole (slit) 324 . Although the guide vane 4 does not extend to the innermost peripheral hole (slit) 325 of the filter 3 in a plan view viewed from the upstream, from the other side end 456 of the guide vane 4 toward the innermost peripheral hole (slit) 325, The rectified air blows out and becomes a swirling flow and flows into the innermost peripheral hole (slit) 325 .

The guide vanes 4 have a rectifying effect, but at the same time they also act as air resistance. Moreover, since it may become a noise source, the shorter one may be preferable. The example in which the innermost peripheral side of the perforated portion 326 is not covered with the guide vanes shows that the guide vanes 4 can be shortened as required. In addition, cleaning efficiency is improved by shortening the guide vanes. If the length of the guide vane 4 is to be shortened, it is desirable to cover about half the area of the perforated portion 326 .

(Modification 1 of Embodiment 1)
[Mounting Range of Guide Vane in Embodiment 1]
Air directed toward the vane portion 45 of the guide vane 4 is restricted to pass through the gap between the rectifying plate 14 and the inner panel 13 because the rectifying plate 14 covers the area directly below (upstream side) the filter 3 . In Embodiment 1, the air flow V that has passed through the guide vanes 4 flows from the outer peripheral side to the inner peripheral side, and the remaining air that has not been sucked into the outermost peripheral hole (slit) 323 and the intermediate peripheral hole (slit) 324 flows into the innermost peripheral hole (slit) 325 . In addition, since the guide vanes 4 change the direction of air flow and have air resistance, the flow rate and flow velocity of the air in the area with the guide vanes 4 are inevitably lower than when the guide vanes 4 are not provided.

FIG. 6(C) is a plan view showing the mounting range of the guide vanes 4 of Modification 1 of Embodiment 1, viewed from the upstream side. Regardless of the presence or absence of the guide vanes 4, the outermost peripheral hole (slit) 323 has a high oil collecting efficiency compared to the other holes (slits) 32 because the outermost peripheral hole (slit) moving speed MS1 is fast. be.
In consideration of the decrease in the flow rate and flow velocity of the air due to the guide vanes 4, the guide vanes 4 are intentionally not provided directly below (upstream side) the outermost peripheral hole (slit) 323, and the intermediate peripheral hole ( Modification 1 is that the guide vanes 4 are provided directly below (on the upstream side of) the slits 324 and the innermost peripheral holes (slits) 325 .
In order to make Modification 1 such as this, the guide vanes are configured as follows.
The one side end 455 is located inside the outermost periphery of the perforated portion 326 of the filter 3 in plan view from the upstream side, and the other side end 456 is located inside the filter 3 from the one side end 455. By positioning, the outermost peripheral side of the perforated portion 326 is not covered with the guide vanes 4 .

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

In the above, explanations have been given using slit regions such as the outermost peripheral hole (slit) 323 , the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 . , or the one side end 455 may be in the middle of the intermediate peripheral hole (slit).

In Modification 1, the holes (slits) 32 are divided into the outermost peripheral hole (slit) 323, the intermediate peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325. ) 32. In that case, one side end 455 of the guide vane 4 may be placed in the middle of one continuous hole (slit) 32 .
Furthermore, the number of divisions of the peripheral hole (slit) may be 4 or more. Particularly in a large oil collector, the diameter of the filter 3 may be large, so it may be preferable to increase the number of divisions.

Modification 1 is also an example in which the guide vanes 4 can be shortened, and shows that the guide vanes 4 can be shortened as necessary. In addition, cleaning efficiency is improved by shortening the guide vanes.

[Summary of Example 1]
Embodiment 1 is a preferred embodiment to include the rectifying plate 14 .
Examples include the following aspects.
The oil collecting device 1 includes an air blower, a filter 3, and guide vanes 4. The air blower sucks air through the filter 3, and the filter 3 has a perforated portion 326 provided with a plurality of holes 32. It is a member that rotates around a rotating shaft 31 by power. The guide vanes 4 are provided on the upstream side surface 33 of the filter 3 and change the flow of air. contains the vector components of .

Moreover, Example 1 includes the following aspects of the oil collector 1 .
The oil collecting device 1 includes an air blower, a filter 3, a guide vane 4, and a straightening vane 14, and the air blower sucks air through the filter 3. As shown in FIG.
The filter 3 is a member having a perforated portion 326 provided with a plurality of holes 32, and is rotated around the rotating shaft 31 by power. is. The guide vane 4 is provided on the upstream side surface 33 of the filter 3 and has one side end 455 and the other side end 456, the one side end 455 being near the outer circumference of the perforated portion 326 or the perforated portion. 326 , and the other side end 456 is positioned closer to the inner peripheral side of the filter 3 than the one side end 455 . A straight line connecting the one side end 455 and the other side end 456 is directed such that the other side end 456 is shifted in the direction opposite to the rotation direction R of the filter 3 with respect to the radial direction starting from the one side end 455 . .

(Example 2)
[Cross-sectional shape of filter pores]
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 the rotation direction front wall 322 , and the rear periphery in the rotation direction R is the rotation direction rear wall 321 . As described above, air containing oily smoke that has passed through each of the holes (slits) 32 collides with the rear wall 321 in the rotational direction due to the rotation of the filter 3, and the oil is collected.

FIG. 7 is an explanatory diagram of oil collection when there is no guide vane in Example 2. FIG. FIG. 7A is a plan view looking upstream of the filter 3 and includes an enlarged view of the frame B shown. The filter 3 of Example 2 includes a perforated portion 326 having an outermost peripheral hole (slit) 323, an intermediate peripheral hole (slit) 324, and an innermost peripheral hole (slit) 325 from the outer peripheral side. As the total area of the holes (slits) 32 provided in the perforated portion 326 increases, the air resistance passing through the filter 3 decreases, but the physical strength of the filter 3 decreases. The arrangement and area of the holes (slits) 32 included in the perforated portion 326 are determined in consideration of the strength and air resistance of the filter 3 . All the holes (slits) 32 have the same rotational speed (angular speed), but since the distance from the rotating shaft 31 increases toward the outer periphery, the outermost peripheral hole moving speed MS1 becomes the fastest. Therefore, the outermost peripheral hole (slit) 323 has the highest oil collection efficiency.

However, since the intermediate hole moving speed MS2 and the innermost hole moving speed MS3 near the rotating shaft 31 are smaller than the outermost hole moving speed MS1, the oil collecting efficiency is inferior to that of the outermost hole (slit) 323 .

Therefore, the shape of the rear wall 321 in the rotation direction (rear side 3211 in the sectional view) that contributes to the oil collection of these holes (slits) 32 is devised to improve the oil collection efficiency.
The blower sucks air through the filter 3, and the filter 3 is a member having a perforated portion 326 provided with a plurality of holes (slits) 32, and rotates around the rotating shaft 31 by power. This is the same as in the first embodiment.

FIG. 7(B) is a sectional view along lines aa, bb, and cc in frame B attached to FIG. 7(A). 7(B)(a) is a cross-sectional view of the outermost peripheral hole (slit) 323 between aa, FIG. 7(B)(b) is a cross-sectional view of the intermediate peripheral hole (slit) 324 between bb, 7B and 7C are sectional views of the innermost peripheral hole (slit) 325 between cc. These cross-sectional views represent cross-sections of holes (slits) 32 when the filter 3 is cut in the circumferential direction about the rotating shaft 31 .

[Operation of Example 2 without guide vanes]
Regardless of the presence or absence of the guide vanes, the cross section of the hole (slit) 32 of the filter 3 is a space including a rotation direction rear side 3211 and a rotation direction front side 3221 . 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 side surface 33 (surface on the stove side) and the other end 3211U of the downstream side surface 34 (surface on the blower side).

Please refer to the cross section of the intermediate peripheral hole (slit) 324 in FIG. 7(B)(b) and the cross section of the innermost peripheral hole (slit) 325 in FIG. 7(B)(c). The rotation direction rear side 3211 has one end 3211D of the upstream side surface 33 (surface on the stove side) and the other end 3211U of the downstream side surface 34 (surface on the blower side). Since one end 3211D of the side surface 33 is located on the opposite side of the rotational direction R of the filter 3 from the other end 3211U of the downstream side surface 34, the rotational direction rear side 3211 is inclined. This inclination is hereinafter referred to as "the relevant inclination". If the inclination is indicated as the second inclination angle φ, the second example is 0°<second inclination angle φ<90°. On the other hand, in the conventional type shown in FIG. 7(B)(a), the second inclination angle φ is 90°.

The air flow without the rectifying plate 14 becomes an air flow containing a vector component A in the direction of the rotating shaft 31 from upstream to downstream, passing through a hole (slit) 32 and sucked.
At this time, since the filter 3 is rotating at a high speed in the rotation direction R, the air flow containing the vector component A in the direction of the rotation axis is directed to the rotation direction rear side 3211 shown in the vertical direction in the drawing, that is, the rotation direction. The oil is hit against the rotation direction rear side 3211 of the direction rear wall 321 , and the oil is collected on the rotation direction rear wall 321 . FIG. 7(B)(a) shows the state of the hole (slit) 32 of the conventional type. In other words, in the conventional type, the rotation of the filter 3 is mainly used to collect the oil. In Example 2, the outermost peripheral hole moving speed MS1 is the highest, and the oil collection efficiency is highest in the outermost peripheral hole (slit) 323. Therefore, the conventional type in which the outermost peripheral hole (slit) 323 is intentionally not provided with the inclination. A hole (slit) 32 is adopted.

In FIG. 7(B)(a) of the conventional type, the second inclination angle φ of the inclination is 90°. The direction of the air flow including the vector component A in the direction of the rotation axis 31 passing through (slit) is parallel. As the filter 3 rotates in the rotation direction R, the air containing soot hits the rotation direction rear wall 321 and the oil is collected.

On the other hand, both the intermediate peripheral hole (slit) 324 in FIG. 7(B)(b) and the innermost peripheral hole (slit) 325 in FIG. 7(c) of Example 2 have the inclination. The airflow containing the vector component A in the direction of the rotation axis 31 and passing through the hole (slit) is directed to hit the rotation-direction rear side 3211 of the rotation-direction rear wall 321 .

Inspired air is deflected by the inclination as it passes through the holes (slits) 32 . Since oil droplets have a greater mass than air, they have a greater inertia than air. Therefore, minute oil droplets contained in the oily smoke go straight due to the inertial force of the air despite the fact that the air flow is turned, and hit the inclined rotation direction rear side 3211 (rotation direction rear wall 321). The inclination contributes to improvement of oil collection efficiency.

Further, if the angle of inclination is a second inclination angle φ, the smaller the second inclination angle φ is less than 90°, the longer the rotation direction rear side 3211 becomes. This corresponds to increasing the area of the rear wall 321 in the rotation direction, which serves as the oil collecting surface, and improves the oil collecting efficiency.

The outermost peripheral hole (slit) 323 has the highest outermost peripheral hole moving speed MS1, and the oil collection efficiency is high even without providing the inclination. The intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 have a moving speed MS smaller than the outermost peripheral hole moving speed MS1, and are inferior in oil collection efficiency. The inclination enhances the oil collection efficiency of the rear wall 321 in the rotational direction, and can compensate for the small moving speed MS. The inclination compensates for the difference in oil collection efficiency (difference in movement speed MS) due to the distance of the hole (slit) 32 from the rotation axis 31 , and can contribute to the uniformity of the oil collection efficiency of the entire filter 3 .
In the second embodiment, in addition to the action of collecting oil due to the rotation of the filter 3 in the rotation direction R, the action of collecting oil due to the inclination is added, so the oil collecting efficiency is improved.

Furthermore, in Example 2, the rotation direction rear side 3211 and the rotation direction front side 3221 of the intermediate peripheral hole (slit) 324 in FIG. 7B(b) and the innermost peripheral hole (slit) 325 in FIG. are substantially parallel, forming a parallelogram space. As a result, the air passing through the holes (slits) 32 flows smoothly.

[Synergy with guide vanes]
FIG. 8 is an explanatory diagram of oil collection with the guide vanes 4 of the second embodiment. FIG. 8A is a plan view (including a partially enlarged view) of the upstream side of the filter 3. FIG.
FIG. 8(B) is a cross-sectional view along lines aa, bb, and cc in frame B attached to FIG. 8(A).
8(B)(a) is a cross-sectional view of the outermost peripheral hole (slit) 323 between aa, and FIG. 8(B)(b) is a cross-sectional view of the intermediate peripheral hole (slit) 324 between bb. 8B and 8C are sectional views of the innermost peripheral hole (slit) 325 between cc. In both drawings, the shape of the hole (slit) of the filter 3 is the same as in each drawing of FIG. 7B, but the only difference is that the guide vanes 4 of the first embodiment are provided.

As described in the first embodiment, the airflow V that has passed through the guide vanes 4 contains the vector component RV in the direction opposite to the rotation direction R of the filter 3 . On the other hand, the flow of air passing through the outermost peripheral hole (slit) 323, the intermediate peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325 and sucked in flows from the upstream side to the downstream side. It contains vector components A in 31 directions.
By combining both vector components, the air flow T trying to pass through the hole (slit) 32 is directed toward the rear side 3211 in the rotation direction. As a result, air containing soot hits the rear wall 321 in the rotational direction, and the collection efficiency is enhanced.

The inclination is not provided in the outermost peripheral hole (slit) 323 of FIG. 8(B)(a). On the other hand, the rotation direction rear sides 3211 of the intermediate peripheral hole (slit) 324 in FIG. 8(B)(b) and the innermost peripheral hole (slit) 325 in FIG. 8(B)(c) have the inclination. ing.
(Note: As described above, the “inclination” refers to one end 3211D of the upstream side surface 33 (stove side surface) of the rotation direction rear side 3211 and the downstream side surface 34 (blower side surface). An end 3211U exists, and one end 3211D of the upstream side surface 33 is located on the opposite side of the rotational direction R of the filter 3 from the other end 3211U of the downstream side surface 34. say.)

8(B)(b) and the innermost peripheral hole (slit) 325 of FIG. 8(B)(c). The fact that the collection efficiency is enhanced is as explained in the above [Operation without guide vanes]. By providing the guide vanes 4, the air flow V passing through the guide vanes 4 has a vector component RV in the direction opposite to the direction of rotation R. In the mode in which the guide vanes 4 are provided, in addition to the effect of the inclination, the effect of generating the reverse vector component RV by the guide vanes 4 is added.

As described above, providing the guide vane 4 and the inclination in the hole (slit) 32 produces a synergistic effect without contradicting each other.

[Summary of the action of the tilt in Example 2]
Inspired air is deflected by the inclination as it passes through the holes (slits) 32 . Since oil droplets have a greater mass than air, they have a greater inertia than air. Therefore, even though the air is turned, it goes straight due to inertial force, hits the rotational direction rear side 3211 (rotational direction rear wall 321) of the inclined hole (slit) 32, and easily adheres.
Further, if the angle of inclination is a second inclination angle φ, the smaller the second inclination angle φ is less than 90°, the longer the rotation direction rear side 3211 becomes. This corresponds to increasing the area of the rear wall 321 in the rotation direction, which serves as the oil collecting surface, and improves the oil collecting efficiency.

The ingenuity of providing the inclination in the rotation direction rear side 3211 (rotation direction rear wall 321) of the above-described second embodiment is based on a principle different from the improvement of the oil collection efficiency by the guide vanes 4. Oil collection efficiency is improved regardless of

In the second embodiment that has been described, the outermost peripheral hole (slit) 323 is not provided with the inclination. On the other hand, in the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 , the second inclination angle φ becomes smaller as each peripheral hole (slit) approaches the rotation axis 31 , and the rotation direction rear side 3211 becomes smaller. It is configured such that the length from one end 3211D to the other end 3321U is long. From the outermost peripheral hole (slit) 323 to the innermost peripheral hole (slit) 325, the difference in oil collection efficiency is reduced, resulting in a filter 3 with uniform and high oil collection efficiency.

As described above, in Example 2, the holes (slits) 32 are three types of peripheral holes (slits) from the outermost peripheral hole (slit) 323 to the innermost peripheral hole (slit) 325 according to the distance from the rotating shaft 31. and The rotation direction rear sides 3211 of the outermost peripheral holes (slits) 323 all have the same second inclination angle φ1, and the rotation direction rear sides 3211 of the intermediate peripheral holes (slits) 324 all have the same second inclination angle φ2. , and the rotation direction rear side 3211 of the innermost peripheral hole (slit) 325 has the same second inclination angle φ3. That is, the second inclination angle φ is the same angle for each peripheral hole (slit), and is changed stepwise so as to satisfy φ1>φ2>φ3.

As a modification, the second tilt angle φ may be changed continuously according to the distance from the rotation axis 31 . In this case, even for one hole (slit) 32, the second tilt angle φ changes according to the distance from the rotation axis.
Also, the second inclination angles φ of all the holes (slits) 32 may be made the same regardless of their positions.

Furthermore, the flow speed and flow rate of the air passing through the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 provided with the inclination are such that the direction of the air passing through the hole (slit) 32 is bent due to the inclination. As the air resistance increases, the velocity of the air slows down and the flow rate also decreases. Therefore, in these regions, even if the intermediate hole moving speed MS2 and the innermost hole moving speed MS3 are slower than the outermost hole moving speed MS1, the oil collecting efficiency is high.

On the other hand, the outermost peripheral hole (slit) 323 with the highest oil collection efficiency is not provided with the inclination, and air flows from the lower surface (upstream, stove side) of the filter 3 to the upper surface (downstream, fan side) without resistance. flow. The velocity and flow rate of the air passing through the outermost peripheral hole (slit) 323 are higher than those of the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 provided with the inclination. Since the flow rate through the outermost peripheral holes (slits) 323 with the highest oil collection efficiency increases, the characteristics of the outermost peripheral holes (slits) 323 can be fully utilized.

The hole (slit) 32 configured in this way extends from the inner peripheral side to the outer peripheral side of the perforated portion 326 , and the inclination of the rotational direction rear side 3211 of the rotational direction rear wall 321 is the outer peripheral side of the perforated portion 326 . It is preferable that the second tilt angle .phi.
At least some of the holes (slits) 32 need only have the inclination, and not all the holes (slits) 32 need to have the inclination.

In the second embodiment, the rotation direction rear wall 321 (rotation direction rear side 3211) of the outermost peripheral hole (slit) 323 is not provided with the inclination, but it is needless to say that the inclination may be provided. In this case, the characteristics of the outermost peripheral holes (slits) 323 with high oil collection efficiency can be further improved. In particular, when a cyclone blower is used, the spirally sucked air is sucked and most of the air is sucked through the outermost peripheral hole (slit) 323 . In order to sufficiently collect the oil, it is preferable to provide the outermost peripheral hole (slit) 323 with the inclination.

Also, even with one hole (slit) 32 , the inclination of the rotation direction rear side 3211 may be changed continuously or stepwise according to the position from the rotation axis 31 . .

As described above, in the second embodiment, the filter 3 is devised to include the blower and the filter 3, the blower sucks air through the filter 3, and the filter 3 has a plurality of holes ( It is a member having a perforated portion 326 provided with a slit 32 . The filter 3 rotates around the rotating shaft 31 by power, and when the surface on the blower side is the downstream side surface 34 and the air sucking side is the upstream side surface 33, the perforated portion 326 is formed on the circumference. A cross section of the hole 32 cut in the direction is a space including at least a rotation direction front side 3221 and a rotation direction rear side 3211 of the filter 3 . In the cross section of at least a part of the holes 32, one end 3211D of the upstream side surface 33 of the rotational direction rear side 3211 is on the opposite side of the rotational direction R of the filter 3 compared to the other end 3211U of the downstream side surface 34. , the rotation direction rear side 3211 is configured to be inclined.

[Opening width of hole (slit)]
FIG. 9 is a cross-sectional view of the hole (slit) 32, which is a cross-sectional view of a position corresponding to the line cc in FIG. 7(A). FIG. 9A is a sectional view of a filter in which the downstream opening width OW2 of the innermost peripheral hole (slit) 325 is larger than the upstream opening width OW1, and FIG. 9B is the innermost peripheral hole (slit). 325 is a sectional view of the filter 3 in which the downstream side opening width OW2 is smaller than the upstream side opening width OW1.
Comparing the embodiment of FIG. 9(A) with the embodiment of FIG. 9(B), the oil collection efficiency of FIG. 9(A) is more advantageous. This is because the wide opening width OW2 of the downstream side, which is the outlet of the air, increases the deflection of the air passing through the hole (slit) 32 .
Further, the filter 3 in which the downstream side opening width OW2 and the upstream side opening width OW1 are wider than the filter 3 in which the downstream side opening width OW2 is the same width as the upstream side opening width OW1 has holes (slits) 32 Since cleaning tools such as brushes can easily reach deep inside, cleaning performance is improved.

(Example 3)
Example 3 is an example of the oil collecting device (range hood) 1 in which the current plate 14 does not exist.
10A and 10B are explanatory diagrams of the third embodiment, and FIG. 10A is a perspective view of the oil collecting device (range hood) 1 viewed from below (upstream side/stove side). FIG. 10B is a partially enlarged view of the guide vanes 4 attached to the oil pan (for the sake of explanation, the filter 3 is not shown and several guide vanes 4 are not shown). 11A and 11B are explanatory diagrams of the angles of the guide vanes 4, FIG. FIG. 4A is a cross-sectional view of the guide vane 4 between dd attached to FIG.
The filter 3 is surrounded by an oil pan 5 . Each guide vane 4 is composed of a mounting surface portion 44 and a vane portion 45 . The guide vane 4 has a mounting surface portion 44 attached to the oil receiver 5, and the guide vane unit 43 as a whole is configured so that the guide vane 4 can be removed when the oil receiver 5 is removed for cleaning or the like. . Therefore, cleanability is improved.

The oil collecting device (range hood) 1 of Example 3 does not have the rectifying plate 14, and there is nothing that blocks the flow of air sucked under the filter 3 (on the upstream side, on the stove side). Therefore, air flows vertically toward the filter 3 from a position on the stove side directly below (upstream side) of the filter 3 . Although this vertical air flow toward the upper side (downstream side) can also occur in Example 1 with the rectifying plate 14, in Example 3 without the rectifying plate 14, it is more pronounced than in Example 1. occurs in

Further, as shown in FIGS. 10A and 11A, the guide vanes 4 extend from the outer peripheral side to the inner peripheral side of the filter 3 in the direction of the rotating shaft 31 . The direction in which the guide vanes 4 extend is different from the direction in which the guide vanes 4 of the first embodiment extend.

The third embodiment includes an air blower, a filter 3 and guide vanes 4, and the air blower sucks air through the filter 3. FIG. The filter 3 is a member having a perforated portion 326 in which a plurality of holes (slits) 32 are provided, and rotates about the rotating shaft 31 by power. As shown in FIGS. 10B and 11B, the guide vanes 4 are provided upstream of the air flow path from the filter 3 and have a downstream side 451 close to the filter 3. It also has an upstream side 452 that faces the downstream side 451 and is farther from the filter 3 than the downstream side 451 .
The upstream side 452 is the oil collection device (range hood) 1 located on the R side of the filter 3 in the rotation direction R from the downstream side 451 .

FIG. 11(B) is a sectional view of the guide vane 4 between dd in FIG. 11(A). The guide vane 4 is bent in the rotational direction R side of the filter 3 at a downstream side 451 connecting the rectangular mounting surface portion 44 and the vane portion 45 . An air flow F directed from a stove (not shown) to the filter 3 goes straight from below (stove side) to the filter 3, but changes direction at a place where the guide vane 4 is present, and passes through the guide vane 4. It is guided in the direction of the air flow V. Since the upstream side 452 of the vane portion 45 is located on the rotation direction R side of the filter 3 from the downstream side 451, the vane portion 45 has a third inclination angle of 90° or less with respect to the upstream side 33 of the filter 3. tilted at δ.
As a result, the airflow V that has passed through the guide vanes 4 includes a vector component RV in the direction opposite to the rotational direction R of the filter 3 .

[Inclination of guide vane]
The third inclination angle δ does not need to be the same at any position on the vane portion 45 and may vary 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 collection efficiency is higher on the outer peripheral side. By decreasing the third inclination angle δ toward the inner peripheral side, the vane portion 45 is tilted toward the filter 3, and the oil collection efficiency of the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 is increased. can also be improved.
As a result, the oil collection efficiency can be made uniform from the outer peripheral side to the inner peripheral side.

Furthermore, the third inclination angle δ of the guide vane 4 located in the outermost peripheral hole (slit) 323 may be vertical in order to take advantage of the performance of the outermost peripheral hole (slit) 323 with the highest oil collection efficiency. With this configuration, in the area of the outermost peripheral holes (slits) 323, the air resistance of the guide vanes 4 is reduced, the air flow rate is increased, and the high oil collection efficiency can be utilized.

On the other hand, the angle of inclination from the upstream side 452 to the downstream side 451 of the vane portion 45 in the region of the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 increases toward the inner peripheral side. ing. As a result, an air flow containing many vector components RV in the direction opposite to the rotation direction R of the filter 3 is generated, and the oil collection efficiency is enhanced. At the same time, air resistance increases due to the change in the direction of flow of the drawn air, reducing the flow rate and flow velocity of the air passing through these slits 32 . In these regions, even if the moving speed MS is the intermediate hole moving speed MS2 or the innermost hole moving speed MS3, which is slower than the outermost hole (slit) 323, the oil collection efficiency is high.

[Curvature of guide vane]
The vane portion 45 may be curved toward the downstream side from the upstream side. The vicinity of the upstream side 452 of the vane portion 45 may be perpendicular to the upstream side 33 of the filter 3, and the vane 45 may be curved so that the closer the downstream side 451, the smaller the third inclination angle δ. The air sucked from the upstream where the stove is located gradually changes its direction according to the curvature of the vane portion 45 and can be smoothly rectified.

[Summary of Example 3]
The third embodiment is a mode of the oil collecting device 1 in which it is preferable not to provide the straightening vanes 14, but the provision of the straightening vanes 14 is not prevented even in the guide vanes 4 of the third embodiment.
The oil collecting device 1 includes an air blower, a filter 3 and guide vanes 4 . The blower sucks air through the filter 3 , and the filter 3 is a member having a perforated portion 326 provided with a plurality of holes 32 , and rotates about the rotating shaft 31 by power. The guide vane 4 is provided on the upstream side 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 farther from the filter 3 than the downstream side 451 . The upstream side 452 is on the rotational direction R side of the filter 3 from the downstream side 451 .

(Example 4)
A fourth embodiment is an example in which a guide vane unit 43 having a plurality of vane portions 45 integrally formed is adopted as the guide vane 4 . As in the first embodiment, it is used in a mode using the rectifying plate 14 . FIG. 12 is an explanatory diagram of the three-dimensionally shaped guide vane unit 43. As shown in FIG. 12A to 12C are perspective views of modes 1 to 3. FIG. Three-dimensional modeling can be performed by various means, but punching with a press machine is preferable because of its high productivity.

In mode 1 of FIG. 12(A), the guide vane unit 43 is made of a thin plate having an annular shape. The ring region has a shape in which angular waves are continuous. A hole in the middle is a portion where the filter 3 is positioned, and a guide vane unit 43 is attached so as to surround the filter 3 . The angular wave portion is the vane portion 45, and air is sucked in from both the bottom (stove side) and top (filter side) of the thin plate. The airflow V that has passed through the guide vanes 4 comes to include a vector component RV in the direction opposite to the rotational direction R of the filter 3 .

Aspect 2 in FIG. 12B is an example in which the vane portion 45 is curved. Since the width of the ring of the guide vane unit 43 is very large and the vane portion 45 is curved, the air flow V passing through the guide vane 4 as shown in the figure is almost the same as the filter 3 can be rectified until it becomes the opposite direction to the rotation direction R of . The relative velocity of the air flow is approximately the sum of the angular velocity of the filter 3 and the velocity of the air flow V passing through the guide vanes 4 . This is an aspect that remarkably enhances the function of the guide vanes 4 .
In this way, the vane portion 45 of the guide vane 4 does not have to linearly rectify the air flow, and may be curved.

Aspect 3 of FIG. 12(C) is a modification of aspect 1, in which a mounting surface portion 44 is integrally formed under the guide vane unit 43 (on the stove side). The mounting surface portion 44 can be mounted on the rear surface of the straightening plate 14 or the like.

(Modification 2)
Variant 2 describes various aspects included in the present invention.
It is preferable that the guide vanes 4 be detachably attached because the oil of oily smoke adheres to the guide vanes 4 . For example, it may be fixed by a detachable method such as a magnet. When the guide vanes 4 are detachably attached one by one, the direction of the guide vanes 4 can be determined as appropriate by preparing a mounting position mark or a receiving portion at the mounting position.
Moreover, the mounting method is not limited. For example, the guide vanes 4 may be welded to peripheral members of the filter 3 .

The guide vanes 4 of the present invention can be applied to various types of blowers, and the peripheral members of the filter 3 also change according to the types of blowers. Needless to say, the present invention includes various configurations such as an embodiment in which only the current plate 14 is provided and no inner panel 13 is provided for cost reduction, and an embodiment in which the inner panel 13 is provided but no current plate 14 is provided.
Further, the peripheral member of the filter 3 to which the guide vanes 4 are attached may be a partition plate in a boot-type range hood or the like as disclosed in Patent Document 1, for example. In Examples 1 to 4, the range hood was explained as an example, but the present invention can also be applied to an air purifier having an oil collection function, and there is no air purifier specific to the range hood. There may also be peripheral members to which the guide vanes 4 may be attached.
Moreover, 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 positioned close to the filter 3 .

In Examples 1 to 4, the cooker hood was explained as the oil collecting device 1 . Range hoods discharge exhaust air to the outside, but the present invention also includes air purifiers that circulate indoors. How the exhaust is done is irrelevant to the essence of the present invention.

As described above, embodiments such as examples and modifications according to the present invention have been described in detail with reference to the drawings. Even if there is a change in design without departing from the gist of the invention, it is included in the present invention.
In addition, each of the above-described embodiments can be combined by diverting each other's techniques unless there is a particular contradiction or problem in the purpose, configuration, or the like.

REFERENCE SIGNS LIST 1 oil collector 11 hood portion 12 blower box 13 inner panel 14 rectifying plate 141 rectifying plate mounting hook 3 filter 31 rotating shaft 32 hole (slit)
321 Rotational direction rear wall 3211 Rotational direction rear side 3211D One end of the upstream side surface 3211U The other end of the downstream side surface 322 Rotational direction front wall 3221 Rotational direction front side 323 Outermost peripheral hole (slit)
324 intermediate peripheral hole (slit)
325 innermost hole (slit)
326 perforated portion 327 convex curve 33 upstream side surface 34 downstream side surface 4 guide vane 41 guide vane mounting hole 42 mounting member 421 fastening member insertion hole 43 guide vane unit 44 mounting surface section 45 vane section 451 downstream side 452 upstream Side 455 One side end 456 Other side end 5 Oil pan DU Exhaust duct MS Moving speed MS1 Outermost peripheral hole moving speed MS2 Intermediate peripheral hole moving speed MS3 Innermost peripheral hole moving speed OW1 Upstream side opening width OW2 Downstream side opening Width R Direction of rotation of the filter RV Vector component in the direction opposite to the direction of rotation A Vector component in the direction of the axis of rotation V Air flow through the guide vanes N Radial direction vector component F Air flow toward the filter T Slits Airflow trying to pass through θ 1st tilt angle φ 2nd tilt angle δ 3rd tilt angle

In order to deal with such problems, the present invention has the following configurations.
A blower and a filter are provided, wherein the blower sucks air through the filter, and the filter is a member having a perforated portion provided with a plurality of holes, and is rotated around a rotation axis by power. and a cross section of the hole obtained by cutting the perforated portion in a circumferential direction around the rotation shaft, where the surface on the blower side is the downstream side and the air sucking side is the upstream side. is a space including at least the front side of the filter in the rotation direction and the rear side of the filter in the rotation direction, and the cross section of at least some of the holes is one end of the upstream side surface of the rear side in the rotation direction. is on the opposite side in the rotational direction of the filter from the other end of the downstream side surface, and the rear side in the rotational direction is inclined.

Claims (6)

comprising a blower and a filter,
The blower sucks air through the filter,
The filter is
A member having a perforated portion provided with a plurality of holes, rotating by power around a rotating shaft,
When the air blower side surface is the downstream side surface and the air sucking side is the upstream side surface,
A cross section of the hole obtained by cutting the perforated portion in a circumferential direction about the rotation axis is a space including at least a front side in the rotation direction of the filter and a rear side in the rotation direction of the filter,
In the cross-section of at least some of the holes, one end of the upstream side surface of the rotation direction rear side is on the opposite side of the rotation direction of the filter compared to the other end of the downstream side surface, and Oil soot collector with sloping sides.
The oil smoke collecting device according to claim 1, wherein the rotation direction front side is substantially parallel to the rotation direction rear side.

3. The hole extends from the inner peripheral side to the outer peripheral side of the perforated portion, and the inclination of the rear side in the rotation direction approaches the vertical direction toward the outer peripheral side of the perforated portion. Oil smoke collecting device according to.
The soot collecting device according to any one of claims 1 to 3, wherein the inclination of the rotation direction rear side of the hole positioned at the outermost periphery of the perforated portion is vertical.
A cooker hood having the soot collector according to any one of claims 1 to 4.
An air cleaning device comprising the oil collecting device according to any one of claims 1 to 4.

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