TW202311679A - Oil collection device - Google Patents

Abstract

Provided is an oil collection efficiency improvement means that is based on a novel principle. According to the present invention, an oil smoke collection device comprises a blower and a filter. The blower suctions air through the filter. The filter: is a member that has a porous part that has a plurality of holes; and is driven so as to rotate around a rotational axis. Cross-sections of the holes taken by cutting the porous part in the circumferential direction as centered on the rotational axis are spaces that include at least a filter rotational direction front edge and a filter rotational direction rear edge, and, when the surface of the filter that is on the blower side is a downstream surface and the surface that is on the air-suctioning side is an upstream surface, the cross-sections of at least a portion of the holes are shaped such that one end of the rotational direction rear edge that is at the upstream surface is on the opposite side in the rotational direction of the filter from another end that is at the downstream surface, making the rotational direction rear edge slanted.

Description

Oil fume trapping device, range hood and air cleaning device

The present invention relates to a cooking fume trapping device, a cooker hood, and an air cleaning device for collecting oil contained in cooking fumes in factories, kitchens, and the like.

Conventionally, as shown in range hoods, a detachable filter is 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 trapping device) in which a filter is provided on the upstream side of a blower. In Patent Document 1, the filter is freely detachable by placing four sides of a rectangular filter on a partition plate attached to the inner surface of the range hood. The filter is a fixed type, and there is a problem that if the mesh of the filter is made finer in order to improve the oil collection efficiency, the exhaust efficiency will decrease.

In recent years, in order to further improve the collection efficiency of the filter, as in Patent Document 2, a mechanism has been developed in which air is sucked in by a suction fan, and a metal filter composed of a disc having a plurality of punched holes is positioned in the air flow. On the road, the metal filter is rotated by the motor to trap the oil from the inhaled air containing oil fume. This mechanism is used as an oil trap (including a range hood).

Patent Document 1: Japanese Patent Application Laid-Open No. 4-3841

Patent Document 2: Japanese Patent Laid-Open No. 2016-180530

The oil collection device of Patent Document 2 that rotates the filter has higher oil collection efficiency than the fixed filter described in Patent Document 1, but it is desired that the oil collection efficiency be further improved.

The object of the present invention is to provide an oil capture efficiency based on a new principle An oil fume trapping device, a range hood and an air cleaning device for improving the method.

In order to solve such a problem, the present invention has the following configurations.

An oil fume trapping device 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, and is driven by a rotation axis Center rotation, when the surface on the blower side becomes the surface on the downstream side and the air intake side becomes the surface on the upstream side, the above-mentioned hole obtained by cutting the above-mentioned hole part along the circumferential direction centering on the above-mentioned rotating shaft The cross-section is a space including at least the front side in the rotation direction of the filter and the rear side in the rotation direction of the filter, and for the above-mentioned cross-section of at least a part of the hole, one end of the surface on the upstream side of the rear side in the rotation direction is located on the downstream side. The other end of the surface is on the opposite side of the rotation direction of the above-mentioned filter, and the rear side of the above-mentioned rotation direction is inclined.

1: Oil trapping device

11: cover part

12: Blower box

13: Inner surface panel

14: Rectifier board

141: Rectification plate installation hook

3: filter

31: axis of rotation

32: hole (slit)

321: Rotation direction rear wall

3211: behind the direction of rotation

3211D: One end of the face on the upstream side

3211U: The other end of the face on the downstream side

322: Rotation direction front wall

3221: Rotation direction front

323: The outermost peripheral hole (slit)

324: middle peripheral hole (slit)

325: Innermost peripheral hole (slit)

326: Hole

327: convex bending

33: Surface on the upstream side

34: Surface on the downstream side

4:Guide vane

41: guide vane installation hole

42: Install components

421: fastening member insertion hole

43:Guide vane unit

44: Install the face

45: blade part

451: Downstream edge

452: The edge on the upstream side

455: side end

456: the other side

5: Oil receiving department

A: The vector component of the axis of rotation

DU: exhaust duct

F: Flow of air towards the filter

MS: movement speed

MS1: moving speed of the outermost hole

MS2: moving speed of middle peripheral hole

MS3: moving speed of the innermost hole

N: Radial vector component

OW1: Opening width on the upstream side

OW2: downstream opening width

R: The direction of rotation of the filter

RV: Vector component in the opposite direction to the direction of rotation

T: The flow of air to pass through the hole (slit)

V: Flow of air passing through the guide vanes

δ: 3rd inclination angle

Θ: 1st inclination angle

Φ: 2nd inclination angle

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

Fig. 2 is an explanatory diagram of an oil trap (range hood). (A) of FIG. 2 is a perspective view which looked at the oil trap (range hood) from below (upstream side/range side). (B) of FIG. 2 is an exploded perspective view of (A) of FIG. 2 . (A magnified view of a part of the component is included.)

Fig. 3 is an explanatory diagram of a filter and guide vane unit.

Fig. 4 is an explanatory diagram showing the relationship between the flow of air rectified by the blades and the rotation direction of the filter. (A) of FIG. 4 is a perspective view showing the flow of air. (B) of FIG. 4 is a plan view seen from the upstream side showing the flow of air.

Fig. 5 is an explanatory diagram of holes (slits). (A) of FIG. 5 is a plan view seen from the upstream side of the filter. (The visible face is the lower surface of the filter.) Enlarged view in Box B is included.

(B) of FIG. 5 is an enlarged perspective view of one hole (slit) in the frame A marked in (A) of FIG. 5 viewed from below (upstream side/cooker side).

FIG. 6 is an explanatory diagram of the installation range of the guide vane. (A-1) of FIG. 6 is a perspective view of a guide vane. (A-2) of Fig. 6 is for the sake of explanation without showing the mounting surface, only A perspective view showing guide vanes of the vane portion. (B) of FIG. 6 is a plan view seen from the upstream side showing the installation range of the guide vanes of the first embodiment. (C) of FIG. 6 is a plan view seen from the upstream side showing the installation range of the guide vane in the modification of the first embodiment.

7 is an explanatory view of oil collection when the guide vanes of Example 2 are not present. (A) of FIG. 7 is a top view seen from the upstream side of a filter. (A part of the enlarged view is included.) (B) of FIG. 7 is a cross-sectional view between a-a, b-b, and c-c in the frame B of FIG. 7(A). (a) of (B) of FIG. 7 is a sectional view of the outermost peripheral hole (slit) between a-a. (b) of (B) of FIG. 7 is a sectional view of the middle peripheral hole (slit) between b-b. (c) of (B) of FIG. 7 is a sectional view of the innermost peripheral hole (slit) between c-c.

FIG. 8 is an explanatory diagram of oil collection when the guide vanes of Example 2 are present. (A) of FIG. 8 is a plan view seen from the upstream side of the filter. (A part of the enlarged view is included.) (B) of FIG. 8 is a cross-sectional view between a-a, b-b, and c-c in the frame B of FIG. 8(A). (a) of FIG. 8(B) is a sectional view of the outermost peripheral hole (slit) between a-a. (b) of FIG. 8 is a sectional view of the middle peripheral hole (slit) between b-b. (c) of FIG. 8 is a sectional view of the innermost peripheral hole (slit) between c-c.

Fig. 9 is a sectional view of a hole (slit). (A) of FIG. 9 is a cross-sectional view of a filter in which the innermost peripheral holes (slits) have a downstream opening width larger than an upstream opening width. (B) of FIG. 9 is a cross-sectional view of a filter in which the innermost peripheral hole (slit) has a downstream opening width smaller than an upstream opening width.

FIG. 10 is an explanatory diagram of Embodiment 3. FIG. (A) of FIG. 10 is a perspective view which looked at the oil trap (range hood) from below (upstream side/range side). (B) of FIG. 10 is a partially enlarged view of a guide vane attached to an oil receiving portion. (For the sake of explanation, the filter is not shown, and the plurality of guide vanes 4 are not shown).

FIG. 11 is an explanatory diagram of angles of guide vanes. (A) of FIG. 11 is a top view seen from the upstream side of an oil trap (range hood). (B) of FIG. 11 is a sectional view of the guide vane located between d-d indicated in (A) of FIG. 11 .

Fig. 12 is an explanatory diagram of a three-dimensional guide vane unit. (A) of Fig. 12 is method 1 stereogram. (B) of FIG. 12 is a perspective view of form 2. FIG. (C) of FIG. 12 is a perspective view of form 3. FIG.

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 with the same functions, and overlapping descriptions in the respective drawings are appropriately omitted.

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

In the present invention, the filter 3 can be installed in any one of a vertical direction, an oblique direction, and a horizontal direction. In the following embodiments, the filter 3 is arranged horizontally, and the air blower, the filter 3 , the guide vanes 4 , and the rectifying plate 14 are arranged sequentially from above. Since the air blower is located at the most downstream of the air suction flow path as described above, the positional relationship is reversed to the direction of the air suction flow path. Here, when referring to the positional relationship, it is expressed as upper, upper side, above, etc., and when expressing the air suction flow path, it is expressed as upstream.

In the following embodiments, the upper and lower of the positional relationship are reversed with the upstream and downstream of the air suction flow path.

(Example 1)

FIG. 1 is a perspective view of an oil trap (range hood) 1 according to Example 1 viewed from the front. A blower (not shown) is installed in the blower case 12 . The air blower exhausts the air containing the sucked oil fumes to the outside through the exhaust duct DU. The hood 11 collects air including oily fumes generated from cooking utensils such as a frying pan located below (upstream) the hood 11 .

”形的整流板安裝鉤部141。整流板14通過將未圖示的卡合構件安裝於整流板14的下游側的面(圖式中背面)且卡合構件與整流板安裝鉤部141卡合，從而整流板14安裝於罩部11。送風機箱體12內的送風機從過濾器3抽吸包含油煙的空氣，並從排氣管道DU向室外排出空氣。所安裝的整流板14與內表面面板13之間空出供包含油煙的空氣通過的間隙，從所安裝的整流板14的四周吸入空氣。 FIG. 2 is an explanatory diagram of the oil trapping device (range hood) 1 . (A) of FIG. 2 is a perspective view which looked at the oil trap apparatus (range hood) 1 from below (upstream side/range side). A rectifying plate 14 is attached to the surface of the cover 11 on the cooker side, and the rectifying plate 14 is made to cover the cover 11 . (B) of FIG. 2 is an exploded perspective view of (A) of FIG. 2 , including enlarged views of some components. An inner panel 13 is provided on the cover portion 11 . "

”-shaped straightening plate installation hook 141. The straightening plate 14 is installed on the downstream side of the straightening plate 14 by an unshown engaging member (the back side in the drawing) and the engaging member is engaged with the rectifying plate installation hook 141 close, so that the rectifying plate 14 is installed on the cover portion 11. The blower in the blower box 12 sucks the air containing oily smoke from the filter 3, and discharges the air from the exhaust duct DU to the outside. The installed rectifying plate 14 and the inner surface Between the panels 13, there is a gap through which the air containing oil fume passes, and the air is sucked in from the periphery of the rectifying plate 14 installed.

[rotation of filter]

FIG. 3 is an illustration showing the positional relationship between the filter 3 and the guide vane 4 , and the filter 3 is installed on the upstream side of the flow of the sucked air as viewed from the blower inside the blower housing 12 . In addition, the positional relationship between the air blower and the filter 3 is appropriate, as long as the air blower exists downstream of the filter 3 . The filter 3 of Example 1 is made of a metal material with 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 also be hard resin.

The filter 3 of Example 1 is located at substantially the same position as the lower surface (surface on the stove side) of the cover 11 , but is not connected to the cover 11 . In FIG. 3 , the surface 33 on the upstream side of the filter 3 (surface on the stove side) is visible. Except for the portion where the filter 3 is installed, the lower surface (the surface on the stove side) of the cover portion 11 is covered with the inner surface panel 13, so the air containing oily fume sucked by the blower (not shown) reliably passes through the filter. 3. The filter 3 provided with many holes 32 rotates at a high speed around the rotating shaft 31 by a power not shown (motor etc.), and collects oil. Moreover, the rotating shaft 31 of the filter 3 may be connected with the rotating shaft of the fan which drives a blower, and the filter 3 may be rotated by the drive part of a blower. In addition, 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 portions that appear black in FIG. 3 serve as perforated portions 326 . The oil trapped and adhered by the holes (slits) 32 flows toward the outer peripheral side of the filter 3 due to centrifugal force, and remains in the oil surrounding the filter 3 from all sides. Accepting part 5. Therefore, the many holes 32 provided in the filter 3 are not clogged, so that the frequency of the cleaning operation of the filter 3 is extremely low, or cleaning is unnecessary. 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).

〔with holes〕

The perforated portion 326 of the filter 3 will be described. The outer periphery of the filter 3 in Example 1 has a portion covered by the oil receiving portion 5 when viewed from the upstream side (the stove side). That is, the hole 32 in the blocked portion does not function as the filter 3 . The perforated portion 326 in the present invention refers to a portion that functions as the filter 3 . The term "the outer periphery of the holed portion 326" refers to the outer periphery of a portion that can function as the filter 3, and the portion of the filter 3 that is blocked by the oil receiving portion 5 is not included in the outer periphery.

[Guide vane mounting member]

FIG. 3 is an explanatory diagram of the filter 3 and the guide vane unit 43 . In FIG. 3 , for the sake of explanation, the associated members of the guide vane unit 43 are shown slightly enlarged. A large number of guide vanes 4 are attached to the mounting member 42 to form a guide vane unit 43 . The guide vane unit 43 is attached to the downstream side surface of the rectification plate 14 (the back surface of the rectification plate 14 shown in FIG. 2 ) by an appropriate method. In FIG. 2 , the guide vane 4 is shown separated from the attachment member 42 , but the guide vane 4 is actually attached to the attachment member 42 as shown in FIG. 3 . In addition, the guide vane unit 43 can be freely attached and detached and can be easily cleaned.

Each guide vane 4 is composed 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 44 and a blade portion 45 . The mounting surface portion 44 is a portion that comes into contact with the mounting member 42 , and guide vane mounting holes 41 are opened at two locations. The guide vane installation hole 41 of the installation surface 44 of the guide vane 4 is aligned with the fastening member insertion hole 421 penetrating through the installation member 42 . Furthermore, the attachment 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 the guide vane 4 is fixed to the mounting member 42 so that they become a Modifications of the body can also be welded. In this case, instead of the guide vane attachment hole 41 , a positioning protrusion or a positioning recess is provided on the attachment surface 44 of the guide vane 4 . Instead of the fastening member insertion hole 421 , the mounting member 42 is provided with a receiving portion that engages with the positioning protrusion or the positioning recess. The guide vane 4 positioned on the mounting member 42 is fixed by welding. The guide vanes 4 are provided with positioning protrusions and positioning recesses at important positions of the orientation and position as will be described later, so that the manufacturing work efficiency can be improved.

Moreover, for easy cleaning, the guide vane 4 can also be installed in a detachable manner.

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

In Embodiment 1, after the guide vane 4 is attached to the mounting member 42 to form the guide vane unit 43, they are attached to the downstream side surface of the rectifying plate 14 (the back surface of the rectifying plate 14 shown in FIG. 2 ), However, the mounting member 42 may be omitted, and the guide vane 4 may be directly mounted on the downstream side surface (back surface) of the rectifying plate 14 .

In addition, the guide vane 4 may be attached to any member as long as it is a member capable of supporting the guide vane 4 . As will be described later, the guide vane 4 has a restriction that it has to be installed at a position directly below the filter 3 (arranged close to the upstream side). Therefore, it is preferably provided on a peripheral member of the filter 3 . For example, the oil receiving part 5, the inner surface panel 13, etc. are mentioned.

In any case, the guide vanes 4 are provided upstream of the filter 3 in the air supply flow path.

〔Guide vane〕

In the guide vane unit 43 , a plurality of guide vanes 4 are attached to the attachment member 42 so as to draw a circle. The blade portion 45 stands vertically with respect to the mounting member 42 . The reference numeral 31 shown in FIG. 3 is a part extending the rotating shaft 31 of the filter 3, and the orientation of the guide vane 4 attached to the guide vane unit 43 is not toward the direction of the rotating shaft 31, but relative to the diameter. tilted slightly.

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

As described so far, the attachment surface 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 part (upstream side) of the filter 3 is covered by a straightening plate 14 not shown, and air sucked in from around the straightening plate 14 flows laterally through the gap between the straightening plate 14 and the inner surface panel 13 . Then, the guide vane 4 is reached. Next, the laterally flowing air that has reached the guide vane 4 is straightened in the direction that the vane portion 45 faces. The flow of air redirected and rectified by the blade portion 45 is the flow of air passing through the blade portion 45 , and is indicated by an arrow marked with “V”. Thereafter, the air changes direction again, and is gradually sucked from the vane portion 45 toward the filter 3 on the downstream side.

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

The filter 3 shown in FIG. 4(B) is an upstream side surface (a cooker side surface), and the guide vane 4 is provided further upstream than the filter 3 in the air supply flow path. The outer periphery of the filter 3 is covered by the oil receiving part 5 when viewed from the upstream side (the stove side). One end 455 of the vane portion 45 of the guide vane 4 is located outside the holed portion 326 , that is, the portion located at the oil receiving portion 5 . 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 hole portion 326 than the one side end 455, and the straight line connecting the one side end 455 and the other side end 456 is as follows: Orientation: The other side end 456 is shifted to the opposite side to the rotation direction R of the filter 3 with respect to the radial direction starting from the one side end 455 .

In Embodiment 1, the vane portion 45 of the guide vane 4 extends linearly, but the vane portion 45 may be curved. Even if the blade portion 45 is curved, the straight line connecting the one end 455 and the other end 456 is shifted to the opposite side to the rotation direction R of the filter 3 relative to the radial direction starting from the one end 455 . That is, the blade portion 45 does not need to be linear.

In addition, the one-side end 455 of the vane portion 45 of the first embodiment is located in the oil receiving portion 5 which is a portion other than the hole portion 326 . However, one side end 455 may be located near the outer periphery of perforated portion 326 , and in this case, one side end 455 is such that part of the outer periphery of filter 3 is not covered by blade portion 45 .

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 in a direction opposite to the rotation direction R of the filter 3 at a first inclination angle θ based on the radial direction. The reference radial direction is shown as a radial vector component N. A symbol "V" in the figure indicates the direction of the flow of air passing through the guide vane 4, which is the direction in which the blade portion 45 extends. The first inclination angle θ is also an angle difference between the vector component N in the radial direction and the flow V of air passing through the guide vane 4 .

If the flow V vector of the air passing through the guide vane 4 is decomposed into the radial direction and the normal direction of the rotation direction R, due to the influence of the first inclination angle θ, the flow V includes a direction opposite to the rotation direction R of the filter 3 The orientation vector component RV.

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

〔Function of guide vanes〕

The power of the filter 3 can be various, but it is preferably a motor. The higher the rotation speed (angular velocity) of the filter 3 is, the higher the oil collection efficiency is. However, electric power is required to rotate at a relatively fast rotational speed (angular velocity), and it is necessary to prepare a high-performance motor that satisfies the required performance of the relatively fast rotational speed (angular velocity), thereby increasing the cost.

In Example 1, in order to solve this problem, the guide vane 4 was provided on the lower surface side (cooker side) of the filter 3. As shown in FIG. The vane portion 45 of the guide vane 4 is inclined in a direction opposite to the rotation direction R at a first inclination angle θ based on the radial direction. Accordingly, 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 will be described in [Number and Angle of Guide Vanes] described later, the oil trapping operation for trapping oil from oil fume is performed by the direction of rotation in which the oil fume collides with the hole (slit) 32. Towards the rear wall 321, it becomes oil and adheres thereto to proceed. The flow V of air passing through the guide vanes 4 includes a vector component RV opposite to the rotation direction R of the filter 3 , and the vector component is a component directed toward the rotation direction rear wall 321 of the hole (slit) 32 . The flow V of the air passing through the guide vanes substantially increases the rotation speed (angular velocity) of the filter 3 . The vector component RV in the opposite direction to the rotation direction R of the filter 3 is a component directed toward the rotation direction rear wall 321 , and accordingly, air collides with the rotation direction rear wall 321 to improve oil collection efficiency.

In this way, the guide vanes 4 have the same effect as increasing the rotation speed (angular velocity) of the filter 3 by generating the flow of air including the vector component RV in the opposite direction to the rotation direction R of the filter 3 . The performance can also be improved only by providing the guide vane 4 on the existing oil trapping device.

[Number and direction of guide vanes]

The guide vane 4 faces a direction deviated from the rotation shaft 31 . The direction (first inclination angle θ) of the guide vane 4 is preferably a direction perpendicular to the angle of the rear wall 321 in the direction of rotation of the hole (slit) 32, but actually it can be adjusted according to the flow velocity of the air sucked by the blower, the filter The rotation speed (angular velocity) of the device 3 changes. In addition, it can also be changed according to the shape of the hole 32 and the direction of the hole (slit) 32 . It goes without saying that the optimization of the orientation of the guide vanes 4 is included in the scope of the present invention. In addition, if the number of guide vanes 4 is increased, the rectification performance is improved, but air resistance is also increased at the same time. The number can also be appropriately optimized. When determining the number and angle of the guide vanes 4, it is preferable to perform optimization based on experiments and simulations.

[Plan shape of filter hole]

FIG. 5 is an explanatory diagram of the hole (slit) 32 , and unnecessary members are not illustrated. (A) of FIG. 5 is a plan view seen from the upstream side of the filter 3 , and the visible surface is the lower surface of the filter 3 (surface on the stove side). (B) of FIG. 5 is an enlarged perspective view of the hole (slit) 32 in the frame A marked in (A) of FIG. 5 viewed from the upstream side (cooker side). When viewing the filter 3 from below (the stove side), the rotation direction R of the filter 3 is in a clockwise direction. The 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 exists to above (downstream) where the blower exists. N represents the radial vector component. The radial vector component N is a radial flow toward the rotation axis 31 . The rear wall 321 in the direction of rotation of the hole (slit) 32 advances toward the passing air due to the rotation of the filter 3 , and thus is hit by the oily smoke contained in the air to cause oil to adhere. As can be understood from this principle, oil adheres to the rotation direction rear wall 321 on the side opposite to the rotation direction R direction. The longer the rear wall 321 in the rotation direction to which oil adheres, the higher the oil collection efficiency. The shape of the hole 32 can be various.

As shown in the enlarged view of frame B in (A) of FIG. (slit) 324, the innermost peripheral hole (slit) 325. All the holes (slits) 32 have a convexly curved portion 327 that is convexly curved in the rotation direction R. As shown in FIG. In (B) of FIG. 5 , which is an enlarged view of one hole (slit) 32 included in frame A, it is more easily understood that the presence of the convex curved portion 327 is shown.

When the holes (slits) 32 having the convexly curved portion 327 are arranged in a line, the filter 3 will appear as a swirl pattern as shown in FIG. 4(A) .

The hole 32 may be circular and has any shape, but is preferably a slit extending from the outer periphery of the filter 3 toward the inner periphery. In addition, if the holes (slits) 32 are made into slits of the convexly curved portion 327 as shown in FIG. It is preferable that the length of the rear wall 321 becomes longer in the direction of rotation of the oil trap. In addition, the closer the angle between the flow V of the air passing through the guide vane 4 and the direction of the wall surface of the rotation direction rear wall 321 is to 90°, the more efficiently the air containing oil collides with the rotation direction rear wall 321 . In order to make the angle close to 90°, the hole (slit) 32 of the first embodiment is a convexly curved portion 327 that 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 diagram of the installation range of the guide vane 4, and (A-1) of Fig. 6 is the flow guide Perspective view of blade 4. As shown in (A-1) of FIG. (A-2) of FIG. 6 is a perspective view of the guide vane 4 in which only the vane portion 45 is shown without the attachment surface 44 for the sake of description.

(B) of FIG. 6 is a plan view from the upstream side showing the installation range of the guide vane 4 of the first embodiment, and the installation surface 44 is not shown for explanation. Most of the vane portions 45 provided with a plurality of guide vanes 4 are located outside the oil receiving portion 5 outside the filter 3 . That is, the one end 455 is located outwardly away from the outermost circumference of the perforated portion 326 in plan view from the upstream side, and the other end 456 is located on the inner peripheral side of the filter 3 .

One end 455 of the blade portion 45 is located outside the hole portion 326 , and therefore, the air flowing toward the filter 3 is rectified by the blade portion 45 before reaching the hole portion 326 . According to this aspect, 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 .

In addition, (B) of FIG. 6 is also an example in which the other side end 456 of the guide vane 4 is located on the outer peripheral side than the innermost periphery of the perforated portion 326 of the filter 3 when viewed from the upstream side, The one side end 455 is located on the outer peripheral side of the filter 3 than the other side end 456 so that the innermost peripheral side of the perforated portion 326 is not covered by the guide vanes.

Due to the action of the guide vanes 4 , air including a vector component in a direction opposite to the rotation direction R of the filter 3 flows into the outermost peripheral holes (slits) 323 and the middle peripheral holes (slits) 324 . When viewed from the upstream side, the guide vane 4 does not extend to the innermost peripheral hole (slit) 325 of the filter 3, but the guide vane 4 extends toward the innermost peripheral hole (slit) from the other side end 456 of the guide vane 4 . The slit) 325 ejects the rectified air to form a swirling flow, and flows into the innermost peripheral hole (slit) 325 .

The guide vanes 4 have a rectification effect, but at the same time become air resistance. In addition, it may become a noise source in some cases, so it may be preferable to be as short as possible. The example in which the innermost peripheral side of the above-mentioned perforated portion 326 is not covered by the guide vane shows that the guide vane 4 can be adjusted as needed. case of shortening. In addition, since the guide vanes are shortened, the cleanliness is improved. If the length of the guide vane 4 is shortened, it is preferable to cover about half of the region of the hole 326 .

(Modification 1 of Embodiment 1)

[Installation range of guide vanes in Embodiment 1]

Since the straightening plate 14 covers the immediately below (upstream side) of the filter 3 , the air toward the vane portion 45 of the guide vane 4 is restricted to pass through the gap between the straightening plate 14 and the inner surface panel 13 . In Example 1, the flow V of air passing through the guide vane 4 flows from the outer peripheral side toward the inner peripheral side, and there is no remaining air sucked by the outermost peripheral hole (slit) 323 and the middle peripheral hole (slit) 324 It flows toward the innermost peripheral hole (slit) 325 . In addition, the guide vane 4 changes the direction of the air flow and has air resistance. Therefore, in the region where the guide vane 4 exists, the flow rate and flow velocity of the air must decrease compared with the case where the guide vane 4 does not exist.

(C) of FIG. 6 is a plan view seen from the upstream side showing the installation range of the guide vane 4 in Modification 1 of Embodiment 1. As shown in FIG. Regardless of the presence or absence of guide vanes 4 , the outermost peripheral hole (slit) 323 has an advantage that oil collection efficiency is higher than that of the other holes (slits) 32 because the outermost peripheral hole (slit) moving speed MS1 is faster.

In consideration of the decrease in the flow rate and flow velocity of the air caused by the guide vane 4, the guide vane 4 is intentionally not provided directly below (upstream side) the outermost peripheral hole (slit) 323, and in the middle where the oil collection efficiency is poor The case where the guide vanes 4 are provided directly below (upstream side) the peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325 is the first modification.

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

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

The guide vanes 4 are located at the middle peripheral hole (slit) 324 and the innermost peripheral hole (slit) slit) 325, therefore, the middle peripheral hole (slot) moving speed MS2, the innermost peripheral hole (slit) moving speed MS3 is slower than the outermost peripheral hole (slit) moving speed MS1. However, the middle 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 vane 4, which Air passes through the middle peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325 , and therefore, the oil collection efficiency becomes high in these holes (slits) 32 where the collection efficiency is poor.

Above, the slit regions such as the outermost peripheral hole (slit) 323, the middle peripheral hole (slit) 324, and the innermost peripheral hole (slit) 325 have been described, but the one side end 455 may be located at the outermost peripheral In the middle of the hole (slit) 323, the one side end 455 may be located in the middle of the middle peripheral hole (slit).

In Modification 1, the hole (slit) 32 is divided into the outermost peripheral hole (slit) 323/intermediate peripheral hole (slit) 324/innermost peripheral hole (slit) 325, but it may be continuous. A hole (slit) 32 . In this case, one end 455 of the guide vane 4 may be placed in the middle of one continuous hole (slit) 32 .

In addition, the number of divisions of the peripheral holes (slits) may be divided into four or more. In particular, in a large-sized oil collection device, since the filter 3 may have a large diameter, it may be 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 where the guide vane 4 can be shortened as necessary. In addition, by shortening the guide vane, cleaning performance is improved.

[Summary of Embodiment 1]

Embodiment 1 is a form preferably including the rectifying plate 14 .

Embodiments include the following aspects.

The oil collection device 1 is provided with a blower, a filter 3, and a guide vane 4. The blower sucks air through the filter 3. The filter 3 is a member having a perforated portion 326 provided with a plurality of holes 32, and is powered by power. The rotating shaft 31 rotates around the center. Moreover, the guide vanes 4 are set The surface 33 placed on the upstream side 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 a direction opposite to the rotation direction R of the filter 3 .

In addition, Example 1 includes the following forms of the oil trap 1 .

The oil collection device 1 includes a blower for sucking air through the filter 3 , a filter 3 , a guide vane 4 , and a straightening plate 14 .

Furthermore, the filter 3 is a member having a perforated portion 326 provided with a plurality of holes 32 , and is rotated about the rotating shaft 31 by power, and the rectifying plate 14 covers the upstream side of the guide vane 4 . The guide vane 4 is arranged on the surface 33 on the upstream side of the filter 3, and has one side end 455 and the other side end 456. The one side end 455 is located near the outer periphery of the holed portion 326 or outside the holed portion 326. The one-side end 456 is located closer to the inner peripheral side of the filter 3 than the one-side end 455 . The straight line connecting the one end 455 and the other end 456 is oriented such that the other end 456 is shifted to the opposite side to the rotation direction R of the filter 3 with respect to the radial direction starting from the one end 455 .

(Example 2)

[Cross-sectional shape of filter hole]

As shown in (B) of FIG. 5 , 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 a 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 . The air containing oily fumes passing through the holes (slits) 32 collides with the rear wall 321 in the rotation direction due to the rotation of the filter 3 , and the oil is collected, as described above.

7 is an explanatory view of oil collection when the guide vanes of Example 2 are not present. (A) of FIG. 7 is a plan view seen from the upstream side of the filter 3 and includes an enlarged view of the frame B shown in the illustration. The filter 3 of Example 2 is provided with a hole 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. . The total area of the holes (slits) 32 provided in the holed portion 326 The larger the value is, the lower the air resistance passing through the filter 3 is, but the physical strength of the filter 3 is lowered. The arrangement and area of the holes (slits) 32 included in the perforated portion 326 are determined in consideration of the strength of the filter 3 , air resistance, and the like. All the holes (slits) 32 have the same rotational speed (angular speed), but the distance from the rotating shaft 31 increases toward the outer periphery, so the outermost peripheral hole moving speed MS1 becomes the highest speed. Therefore, the oil collection efficiency of the outermost peripheral hole (slit) 323 is the highest.

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

Here, the oil collection efficiency can be improved by devising the shape of the rotation direction rear wall 321 (the rotation direction rear side 3211 in the sectional view) of these holes (slits) 32 which contributes to oil collection.

The air blower sucks in air through the filter 3. The filter 3 is a member having a perforated portion 326 provided with a plurality of holes (slits) 32, and rotates about the rotating shaft 31 by power, which is the same as that of the first embodiment. same.

(B) of FIG. 7 is a cross-sectional view between a-a, b-b, and c-c in frame B in FIG. 7(A). (a) of Fig. 7 (B) is a sectional view of the outermost peripheral hole (slit) 323 between a-a, and (b) of Fig. 7 (B) is a sectional view of the middle peripheral hole (slit) 324 between b-b, (c) of (B) of FIG. 7 is a sectional view of the innermost peripheral hole (slit) 325 between c-c. These cross-sectional views show the cross-section of the hole (slit) 32 when the filter 3 is cut along the circumferential direction centering on the rotating shaft 31 .

[Effect of Embodiment 2 when there is no guide vane]

The cross section of the hole (slit) 32 of the filter 3 is a space including the rear side 3211 in the rotation direction and the front side 3221 in the rotation direction regardless of the presence or absence of guide vanes. This space serves as a flow path through which air containing oil fumes passes through the filter 3 . Furthermore, the rotation direction rear edge 3211 has one end 3211D of the surface 33 on the upstream side (the surface on the stove side) and the other end 3211U on the surface 34 on the downstream side (the surface on the fan side).

Refer to the section of the middle peripheral hole (slit) 324 in (b) of FIG. 7(B) and the section of the innermost peripheral hole (slit) 325 in (c) of FIG. 7(B). The rear side 3211 in the direction of rotation has one end 3211D of the surface 33 on the upstream side (the surface on the stove side) and the other end 3211U on the surface 34 on the downstream side (the surface on the blower side). Since the other end 3211U of the surface 34 on the downstream side is on the opposite side to the rotation direction R of the filter 3, the rotation direction rear edge 3211 is inclined. This inclination is hereinafter referred to as "the inclination". When this inclination is expressed as the second inclination angle φ, 0°<second inclination angle φ<90°, which is the second embodiment. In contrast, in (a) of FIG. 7(B) of the conventional type, the second inclination angle φ is 90°.

The flow of air in the absence of the rectifying plate 14 is 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 sucked through the holes (slits) 32 .

At this time, the filter 3 rotates in the rotation direction R at a high speed, so the flow of air including the vector component A in the rotation axis hits the rotation direction rear edge 3211 shown in the vertical direction in the figure, that is, the rotation direction rear wall 321. The rear edge 3211 in the direction of rotation, oil is collected by the rear wall 321 in the direction of rotation. (a) of (B) of FIG. 7 shows this situation, and it becomes the hole (slit) 32 of a conventional type. In other words, in the conventional type, oil is collected mainly by rotation of the filter 3 . In Example 2, the moving speed MS1 of the outermost peripheral hole becomes the highest speed, and the oil collection efficiency of the outermost peripheral hole (slit) 323 is the highest. Types of holes (slits)32.

In (a) of FIG. 7(B) of the conventional type, the second inclination angle φ of this inclination becomes 90°, therefore, as shown in the figure, the direction including the rotation direction rear edge 3211 of the rotation direction rear wall 321 and the The direction of the air flow of the vector component A in the direction of the rotating shaft 31 through which the hole (slit) passes is parallel. When the filter 3 is rotated in the rotation direction R, the air containing oil fume collides with the rotation direction rear wall 321, and oil is collected.

On the other hand, both the middle peripheral hole (slit) 324 in (b) of FIG. 7(B) and the innermost peripheral hole (slit) 325 in FIG. 7( c ) of Example 2 have this inclination. The air flowing through the hole (slit) including the vector component A in the direction of the rotation axis 31 collides with the rotation direction rear edge 3211 of the rotation direction rear wall 321 .

When the sucked air passes through the holes (slits) 32, it is deflected by this inclination. Since the oil droplet has a larger mass than air, its inertial force is greater than that of air. Therefore, even though the flow of the air is deflected, the fine oil droplets included in the oily smoke travel straight due to the inertial force, and collide with the inclined rotation direction rear side 3211 (rotation direction rear wall 321 ). This inclination contributes to the improvement of oil collection efficiency.

In addition, if the angle of inclination is taken as the second inclination angle φ, the smaller the second inclination angle φ is than 90°, the longer the rear side 3211 in the rotation direction becomes. This corresponds to increasing the area of the rear wall 321 in the rotation direction serving as the oil collecting surface, and the oil collecting efficiency is improved.

In the outermost peripheral hole (slit) 323, the outermost peripheral hole moving speed MS1 becomes the highest speed, and even if this inclination is not provided, the oil collection efficiency is high. The middle peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325 have a moving speed MS lower than the moving speed MS1 of the outermost peripheral holes, and the oil collection efficiency is poor. This inclination improves the oil collection efficiency of the rear wall 321 in the rotation direction, and can compensate for the relatively small moving speed MS. This inclination compensates for the difference in oil collection efficiency (difference in moving speed MS) due to the difference in the distance between the holes (slits) 32 and the rotation shaft 31 , and contributes to the uniformity of the oil collection efficiency of the filter 3 as a whole.

In Example 2, in addition to the oil trapping effect caused by the rotation of the filter 3 in the rotation direction R, the oil trapping effect due to the inclination is added, so the oil trapping efficiency is improved.

In addition, in Example 2, the rear edge 3211 in the rotation direction of the middle peripheral hole (slit) 324 in (b) of FIG. 7(B) and the innermost peripheral hole (slit) 325 in FIG. The direction fronts 3221 are substantially parallel to form a parallelogram space. Thereby, the air passing through the holes (slits) 32 flows smoothly.

[Synergy with guide vanes]

FIG. 8 is an explanatory diagram of oil collection when the guide vane 4 of the second embodiment is present. (A) of FIG. 8 is a plan view (including a part of the enlarged view.) seen from the upstream side of the filter 3 .

(B) of FIG. 8 is a cross-sectional view between a-a, b-b, and c-c in the frame B of FIG. 8(A).

(a) of Fig. 8 (B) is a sectional view of the outermost peripheral hole (slit) 323 between a-a, and (b) of Fig. 8 (B) is a sectional view of the middle peripheral hole (slit) 324 between b-b, (c) of (B) of FIG. 8 is a sectional view of the innermost peripheral hole (slit) 325 between c-c. The shapes of the holes (slits) of the filter 3 in all the drawings are the same as those in FIG. 7(B), but differ only in that the guide vanes 4 of the first embodiment are provided.

As described in Embodiment 1, the flow V of air passing through the guide vanes 4 includes a 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 in through the outermost peripheral hole (slit) 323 , the middle peripheral hole (slit) 324 , and the innermost peripheral hole (slit) 325 includes rotation from the upstream side toward the downstream side. Vector component A in the direction of axis 31.

By combining the two vector components, the flow T of the air to pass through the hole (slit) 32 is directed toward the rear side 3211 in the rotation direction. Thereby, the air containing oil fume collides with the rear wall 321 in the rotation direction, and the collection efficiency becomes high.

On the other hand, the inclination is not provided in the outermost peripheral hole (slit) 323 in (a) of (B) of FIG. 8 . On the other hand, the rotation direction rear edge 3211 of the middle peripheral hole (slit) 324 of (b) of FIG. 8(B) and the innermost peripheral hole (slit) 325 of (c) of FIG. 8(B) has The tilt.

(Note: "the inclination" refers to the existence of one end 3211D of the upstream side surface 33 (the surface on the stove side) and the other end 3211U of the downstream side surface 34 (the surface on the blower side) of the rear edge 3211 in the rotation direction as described above, In addition, one end 3211D of the surface 33 on the upstream side is inclined to the rear side 3211 of the rotation direction on the opposite side to the rotation direction R of the filter 3 than the other end 3211U of the surface 34 on the downstream side.)

Due to this inclination, the rotation direction of the middle peripheral hole (slit) 324 in (b) of FIG. 8(B) and the innermost peripheral hole (slit) 325 in (c) of FIG. The oil collection efficiency of 3211 becomes higher As explained in]. By providing the guide vanes 4 , the flow V of the air passing through the guide vanes 4 has a vector component RV opposite to the direction of rotation R. FIG. In the form of providing the guide vane 4 , in addition to the effect due to the inclination, the effect of the vector component RV in the opposite direction due to the guide vane 4 is added.

As described above, the guide vane 4 and the obliquely provided hole (slit) 32 produce a synergistic effect without contradicting each other.

[Summary of the effect of the inclination in Example 2]

Aspirated air is deflected by this inclination when passing through the holes (slits) 32 . Because the mass of oil droplets is larger than that of air, the inertial force is larger than that of air. Therefore, even though the air is deflected, the oil drop travels straight due to inertial force, collides with the rotation direction rear edge 3211 (rotation direction rear wall 321 ) of the inclined hole (slit) 32 , and adheres easily.

In addition, if the inclination angle is set as the second inclination angle φ, the smaller the second inclination angle φ is than 90°, the longer the rotation direction rear side 3211 is. This corresponds to increasing the area of the rear wall 321 in the rotation direction serving as the oil collecting surface, and the oil collecting efficiency is improved.

The design of providing the inclination at the rear side 3211 in the rotation direction (the rear wall 321 in the rotation direction) of the above-mentioned embodiment 2 is based on a design based on a principle different from that of improving the oil collection efficiency by the guide vane 4, regardless of whether the guide vane 4 is present, the oil The collection efficiency is improved.

In Example 2 described so far, the inclination is not provided in the outermost peripheral hole (slit) 323 . On the other hand, the middle peripheral holes (slits) 324 and the innermost peripheral holes (slits) 325 are configured such that each of the peripheral holes (slits) approaches the rotation shaft 31, the second inclination The angle φ becomes smaller, and the length of the rear side 3211 in the rotation direction from one end 3211D to the other end 3321U becomes longer. From the outermost peripheral hole (slit) 323 to the innermost peripheral hole (slit) 325 , the difference in oil collection efficiency is reduced, and the filter 3 has a uniform and high oil collection efficiency.

As described above, in Example 2, three types of peripheral holes ( slit). Moreover, the rotation direction rear side of the outermost peripheral hole (slit) 323 3211 all become the same second inclination angle φ1, the rotation direction rear edge 3211 of the middle peripheral hole (slit) 324 all becomes the same second inclination angle φ2, and the rotation direction rear edge 3211 of the innermost peripheral hole (slit) 325 becomes The same second inclination angle φ3. In other words, the second inclination angle φ becomes the same angle for each peripheral hole (slit), and changes stepwise so that φ1>φ2>φ3.

As a modified example, the second inclination angle φ may be continuously changed according to the distance from the rotation axis 31 . In this case, also in one hole (slit) 32, the second inclination angle φ changes according to the distance from the rotation axis.

In addition, the second inclination angle φ of all the holes (slits) 32 may be made the same regardless of their positions.

And, regarding the flow velocity and the flow rate of the air passing through the middle peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 provided with this inclination, the air passing through the hole (slit) 32 will be affected by the inclination. The direction of the air is bent, and the air resistance becomes larger, so the flow velocity becomes slower and the flow rate decreases. Therefore, in these regions, even if the moving speed MS2 of the middle peripheral hole and the moving speed MS3 of the innermost peripheral hole are slower than the moving speed MS1 of the outermost peripheral hole, the oil collection efficiency becomes high.

On the other hand, the outermost peripheral hole (slit) 323 with the highest oil collection efficiency is not provided with this inclination, and the air flows from the lower surface (upstream/range side) to the upper surface (downstream/blower side) of the filter 3 without resistance. . In terms of the flow velocity and flow rate of the air passing through the outermost peripheral hole (slit) 323, compared with the intermediate peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 provided with this inclination, the flow velocity and flow rate become smaller. big. The flow rate through the outermost peripheral hole (slit) 323 having the highest oil collection efficiency increases, and therefore, the characteristics of the outermost peripheral hole (slit) 323 can be fully exhibited.

The hole (slit) 32 configured in this way preferably exists from the inner peripheral side to the outer peripheral side of the perforated portion 326, and the inclination of the rotational direction rear edge 3211 of the rotational direction rear wall 321 increases for the second time toward the outer peripheral side of the perforated portion 326. 2 The inclination angle φ is close to vertical.

In addition, it is only necessary that at least a part of the holes (slits) 32 have this inclination, It is not necessary that all the holes (slits) 32 have this inclination.

In addition, in Example 2, the rotation direction rear wall 321 (rotation direction rear edge 3211 ) of the outermost peripheral hole (slit) 323 is not provided with this inclination, but it goes without saying that this inclination may also be provided. figurative. 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-type blower is used, the air sucked in a swirl shape is sucked in, and most of the air is sucked in through the outermost peripheral holes (slits) 323 . In order to sufficiently collect oil, it is preferable to provide such an inclination in the outermost peripheral hole (slit) 323 .

In addition, in one hole (slit) 32 , the inclination of the rear edge 3211 in the rotation direction may be continuously changed or may be changed in stages according to the position from the rotation axis 31 .

As above, in Embodiment 2, the filter 3 is worked hard, and the blower and the filter 3 are provided. The blower sucks air through the filter 3. A member of the hole portion 326 . Moreover, the filter 3 rotates around the rotating shaft 31 due to power, and when the surface on the blower side is the surface 34 on the downstream side and the side where the air is sucked in is the surface 33 on the upstream side, the perforated portion 326 is placed along the circumference. The cross section of the hole 32 cut in the direction is a space including at least the front side 3221 in the rotation direction and the rear side 3211 in the rotation direction of the filter 3 . Moreover, it is configured such that the one end 3211D of the surface 33 on the upstream side of the rear edge 3211 in the rotation direction is opposite to the rotation direction R of the filter 3 than the other end 3211U of the surface 34 on the downstream side for at least a part of the cross section of the hole 32. side, the rear edge 3211 is inclined in the direction of rotation.

[Opening width of hole (slit)]

Fig. 9 is a cross-sectional view of the hole (slit) 32, and is a cross-sectional view corresponding to a position between c-c of Fig. 7(A) . (A) of FIG. 9 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. 9(B) is the innermost peripheral hole (slit) 325. A cross-sectional view of the filter 3 whose downstream opening width OW2 is smaller than the upstream opening width OW1.

Comparing the form of FIG. 9(A) and the form of FIG. 9(B), the form of FIG. 9(A) is more favorable in terms of oil collection efficiency. This is because the opening width OW2 on the downstream side, which is the outlet of the air, is large, so that the deflection of the air passing through the hole (slit) 32 becomes large.

In addition, compared with the filter 3 having the same width as the downstream opening width OW2 and the upstream opening width OW1, the filter 3 having a larger downstream opening width OW2 or upstream opening width OW1 can easily reach the hole with a cleaning tool such as a brush. (Slit) 32 deep, so cleanability is improved.

(Example 3)

Embodiment 3 is an example of the oil trapping device (range hood) 1 in which the rectifying plate 14 does not exist.

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

The filter 3 is surrounded by an oil receiving portion 5 . Furthermore, each guide vane 4 is composed of a mounting surface portion 44 and a blade portion 45 . The guide vane 4 is attached to the oil receiving part 5 with the mounting surface 44, and the guide vane unit 43 is formed as a whole so that the guide vane 4 can also be removed when the oil receiving part 5 is removed for cleaning or the like. Therefore, cleanability becomes high.

The oil trapping device (range hood) 1 of Example 3 does not have the rectification plate 14, and does not block the flow of the 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 stove side directly below (upstream side) of the filter 3 . In addition, the flow of air in the vertical direction toward the upper side (downstream side) can also be generated in Example 1 in which the rectifying plate 14 is present, but in the absence of In Example 3 in which the rectifying plate 14 is present, it occurs more remarkably than in Example 1.

In addition, as shown in FIG. 10(A) and FIG. 11(A) , the guide vane 4 extends from the outer peripheral side of the filter 3 toward the inner peripheral side toward the rotation shaft 31 . The direction in which the guide vane 4 extends is different from the direction in which the guide vane 4 in the first embodiment extends.

Example 3 includes a blower, a filter 3 , and guide vanes 4 , and the blower sucks air through the filter 3 . And the filter 3 is a member which has the perforated part 326 provided with the several hole (slit) 32, and rotates centering on the rotating shaft 31 by power. As shown in (B) of FIG. 10 and (B) of FIG. 11 , the guide vane 4 is provided on the upstream side of the air supply flow path from the filter 3 and has a side 451 close to the downstream side of the filter 3 . , and has an upstream side 452 that faces the downstream side 451 and is farther from the filter 3 than the downstream side 451 .

And it becomes the oil collection apparatus (range hood) 1 in which the side 452 of an upstream side exists in the rotation direction R side of the filter 3 rather than the side 451 of a downstream side.

(B) of FIG. 11 is a sectional view of the guide vane 4 located between d-d indicated in (A) of FIG. 11 . The guide vane 4 is bent toward the rotation direction R side of the filter 3 at a portion of a downstream side side 451 connecting the rectangular mounting surface portion 44 and the blade portion 45 . The flow F of the air directed toward the filter 3 from the stove, not shown, is directed straight from below (the stove side) toward the filter 3, but is changed in direction by the portion where the guide vane 4 exists, and is passed through The direction of the flow V of the air is guided by the guide vanes 4 . The blade portion 45 is inclined at a third inclination angle δ of 90° or less with respect to the surface 33 on the upstream side of the filter 3 by placing the upstream side 452 on the rotation direction R side of the filter 3 relative to the downstream side 451 .

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

〔Inclination of guide vane〕

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

As mentioned above, the moving speed MS of the filter 3 is larger on the outer peripheral side than on the inner peripheral side, and the oil collection efficiency becomes higher toward the outer peripheral side. By making the third inclination angle δ smaller as it goes toward the inner peripheral side, the vane portion 45 is tilted toward the filter 3, and it is also possible to improve oil capture efficiency.

Thereby, the oil collection efficiency can be equalized from the outer peripheral side to the inner peripheral side.

In addition, in order to exert the performance of the outermost peripheral hole (slot) 323 with the highest oil collection efficiency, the third inclination angle δ of the guide vane 4 located at the outermost peripheral hole (slit) 323 may be vertical. According to this configuration, in the area of the outermost peripheral hole (slit) 323, the air resistance of the guide vane 4 is reduced, the flow rate of the air is increased, and the oil collection efficiency can be improved.

On the other hand, the angle of inclination from the upstream side 452 toward the downstream side 451 of the blade portion 45 in the region of the middle peripheral hole (slit) 324 and the innermost peripheral hole (slit) 325 is closer to the inner peripheral side. is larger. Thereby, a flow of air including many vector components RV in the opposite direction to the rotation direction R of the filter 3 is generated, and the oil collection efficiency is improved. At the same time, the direction of the flow of the sucked air changes, so air resistance increases, and the flow rate and flow velocity of the air passing through these holes (slits) 32 decrease. In these regions, even if the moving speed MS is the middle peripheral hole moving speed MS2 and the innermost peripheral hole moving speed MS3 slower than the outermost peripheral holes (slits) 323 , the oil collection efficiency is improved.

〔Curved guide vane〕

The blade portion 45 may be curved from the upstream side toward the downstream side. The vane portion 45 can also be bent such that the vicinity of the upstream side 452 is in the vertical direction with respect to the upstream surface 33 of the filter 3 , and the third inclination angle δ becomes smaller as it gets closer to the downstream side 451 . The direction of the air sucked in from the upstream side where the stove exists changes gradually along with the bending of the blade part 45, and can be rectified smoothly.

[Summary of Embodiment 3]

Embodiment 3 is a preferred form of the oil trap device 1 in which the straightening plate 14 is not provided, but even the guide vane 4 of the third embodiment does not prevent the installation of the straightening plate 14 .

The oil collection device 1 includes a blower, a filter 3 , and a guide vane 4 . The air blower sucks air through the filter 3, which is a member having a perforated portion 326 provided with a plurality of holes 32, and rotates about the rotating shaft 31 by power. Furthermore, the guide vane 4 is provided on the upstream side surface 33 of the filter 3 and has a downstream side side 451 and an upstream side 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 filter 3 than the downstream side 451 . The side 452 on the upstream side is located on the side in the rotation direction R of the filter 3 relative to the side 451 on the downstream side.

(Example 4)

Embodiment 4 is an example employing a guide vane unit 43 having a plurality of blade portions 45 formed integrally as the guide vane 4 . The same method as in the first embodiment is used for the method of using the rectifying plate 14 . FIG. 12 is an explanatory diagram of a three-dimensional guide vane unit 43 . 12(A) to 12(C) are perspective views of modes 1 to 3. Three-dimensional shaping can be performed by various methods, but punching by a press machine is preferable because of its high productivity.

In the form 1 of (A) of FIG. 12 , the guide vane unit 43 is formed of a thin plate formed in an annular shape. The area of the ring becomes 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 the vane portion 45, and air is sucked in from both the bottom (cooker side) and top (filter side) of the thin plate. 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 .

Mode 2 in (B) of FIG. 12 is an example in which the blade portion 45 is curved. The width of the circular ring of the guide vane unit 43 is very large, and since the blade portion 45 is curved, the flow V of the air passing through the guide vane 4 can be rectified so as to be almost equal to that of the filter 3 as shown in the figure. The direction of rotation R is the opposite direction. The relative velocity of the flow of air is substantially the velocity obtained by adding the velocity of the flow V of air passing through the guide vanes 4 to the angular velocity of the filter 3 . This is how the function of the guide vanes 4 is significantly improved.

In this way, the vane portion 45 of the guide vane 4 does not need to be a member that straightens the flow of air, but may be a member that bends the flow of air.

Mode 3 in (C) of FIG. 12 is a modified example of Mode 1, and the attachment surface 44 is formed by integral molding below the guide vane unit 43 (on the stove side). The attachment surface 44 can be attached to the back surface of the rectifying plate 14 or the like.

(Modification 2)

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

The oil of soot adheres to the guide vane 4, so it is preferable that the guide vane 4 be detachably attached. For example, it can also be fixed by a detachable method such as a magnet. When the guide vanes 4 are detachably constituted one by one, in order to determine the direction of the guide vanes 4 , proper care can be taken in marking the mounting position, preparing a receiving portion at the mounting position, and the like.

In addition, the installation method is arbitrary. For example, the guide vanes 4 may be welded to peripheral members of the filter 3 .

The guide vane 4 of the present invention can be applied to various types of air blowers, and the peripheral members of the filter 3 also vary depending on the types of air blowers. In addition, it goes without saying that the present invention includes various configurations such as a configuration in which only the rectifying plate 14 is provided without the inner surface panel 13 , and a configuration in which the inner surface panel 13 is provided but the rectification plate 14 is not present in order to reduce costs.

Moreover, for example, in the case of a range hood like Patent Document 1, the peripheral member of the filter 3 to which the guide vane 4 is attached may be a partition plate. In Embodiments 1 to 4, a range hood was used as an example to explain, but the present invention can also be applied to an air cleaner with an oil trapping function, and there may be air purification that does not exist in a range hood In the case of a peripheral member unique to the device, the guide vane 4 may be attached to the member.

In addition, peripheral members to which the guide vane 4 of the present invention is mounted include members capable of mounting the guide vane 4 via a bracket or the like, and are not limited to being close to the filter 3 in position. components.

In Examples 1 to 4, the range hood was described as the oil trapping device 1 . In the range hood, the exhaust gas is discharged to the outside, but an air cleaning device in the form of circulating indoors is also included in the present invention. How to change the exhaust has nothing to do with the essence of the present invention.

As mentioned above, embodiments such as examples and modified examples of the present invention have been described in detail with reference to the drawings, but the specific configuration is not limited to these embodiments, and design changes within the scope of the present invention are also included in the present invention. .

In addition, as long as there is no particular conflict or problem in the above-mentioned respective embodiments, the purpose, structure, etc., each other's technology can be used and combined.

3: filter

31: axis of rotation

3211: behind the direction of rotation

3211D: One end of the face on the upstream side

3211U: The other end of the face on the downstream side

3221: Rotation direction front

323: The outermost peripheral hole (slit)

324: middle peripheral hole (slit)

325: Innermost peripheral hole (slit)

326: Hole

327: convex bending

33: Surface on the upstream side

34: Surface on the downstream side

A: The vector component of the axis of rotation

MS1: moving speed of the outermost hole

MS2: moving speed of middle peripheral hole

MS3: moving speed of the innermost hole

R: The direction of rotation of the filter

Φ: 2nd inclination angle

Claims (6)

An oil fume trapping device, characterized in that, Equipped with blower, filter, The blower draws air through the filter, For the filter, It is a member having a perforated part provided with a plurality of holes, and it is powered to rotate around the axis of rotation, When making the surface on the blower side the downstream side and making the suction air side the upstream side, The cross section of the hole obtained by cutting the hole part along the circumferential direction centering on 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, Regarding the cross-section of at least a part of the hole, one end of the upstream side surface behind the rotation direction is located on the opposite side of the rotation direction of the filter than the other end of the downstream side surface, so The direction of rotation is tilted behind. The oil fume trapping device according to claim 1, wherein the front side in the rotation direction is substantially parallel to the rear side in the rotation direction. The oil fume trapping device according to claim 1 or 2, wherein the hole exists from the inner peripheral side to the outer peripheral side of the holed part, and the inclination of the rear side of the rotation direction is closer to the holed part The outer peripheral side is closer to vertical. The oil fume trapping device according to any one of claims 1 to 3, wherein the inclination behind the rotation direction of the hole located at the outermost periphery of the hole portion is vertical. A cooker hood, characterized by having the fume trapping device described in any one of claims 1-4. An air cleaning device, characterized by having the oil trapping device described in any one of Claims 1 to 4.

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