JP2019032163A - Oil collection device and range hood - Google Patents

Abstract

To prevent a lot of oil from flowing in a position that can come into contact with a filter, by suppressing the collected oil circularly flowing repeatedly and by storing the oil in an intended place.SOLUTION: An oil collection device 100A includes: a disc-shaped filter 10A having a hole; an electric motor 20A for rotating the filter; and an oil content collection member 30A located around the filter. The rotational frequency of the filter per unit time is equal to or greater than 230 rpm. The oil content collection member includes: an inside wall 32A arranged at substantially an equal distance from a peripheral edge part 12A of the filter; an extension part 33A extended further inside than a lower end part of the inside wall; and a rising part 34 rising toward the filter from an inner peripheral edge part of the extension part. The rising part includes: an outside wall 342 of the rising part arranged at substantially an equal distance from the peripheral edge part of the filter; and a second irregular shape portion 341 arranged at a distance different from the distance between the peripheral edge end part of the filter and the outside wall.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an oil collecting device and a range hood, and more particularly to an oil collecting device that rotates a filter to collect oil and a range hood provided with the oil collecting device.

  A range hood that is installed above or around the cooker and collects smoke, oil particles, and odors generated by cooking and exhausts or circulates indoors in an oil trap to separate and recover the oil from the collected air. A collecting device is provided. In this oil collection device, increasing the oil collection rate prevents contamination of the blower and ducts on the downstream side of the air flow of the device, and contributes to prolonging the maintenance cycle and extending the service life. Therefore, the applicant has applied for a range hood equipped with a high collection type oil collection device that achieves a high oil collection rate by collecting oil by rotating a disk-shaped filter at high speed (patent) Reference 1).

Japanese Patent Application No. 2011-290150

  In this high collection type oil collecting device, a filter cover for collecting oil and fat is provided around and below the disk-shaped filter that rotates at high speed, and the oil and fat that is captured and scattered by the filter is collected. In addition, oil and fat are prevented from dripping from the range hood.

  However, since a swirl flow generated by the rotation of the filter exists inside the filter cover, oil flows so as to circulate in the filter cover by the swirl flow. For this reason, the amount of oil flowing with use of the apparatus gradually increases and comes into contact with the disk-shaped filter, which may adversely affect the normal operation of the filter. In order to avoid such a situation, it is conceivable to increase the allowable oil capacity by deepening the shape of the filter cover or increasing the width of the filter cover. When installing in a range hood, since the range which can be attached by the structure of the range hood main body will be restricted, it is not desirable.

  In view of this, the present invention suppresses repeated circulation of the collected oil and keeps the oil at an intended place so that a large amount of oil does not flow at a position where it may come into contact with the filter. An object is to provide a collecting device and a range hood.

In order to solve the above-mentioned problem, a disk-shaped filter having holes, an electric motor for rotating the filter, and an oil collecting member positioned around the filter are provided, and the rotational speed per unit time of the filter is 230 rpm. The oil collecting member is an inner wall disposed at an approximately equal distance from the peripheral edge of the filter, an extending part extending inward from the lower end of the inner wall, and an inner edge of the extending part. A rising portion that rises toward the side of the filter, and the rising portion is a distance different from the distance between the outer peripheral wall of the rising portion and the outer peripheral wall of the filter, and the outer wall of the rising portion disposed at approximately the same distance from the peripheral edge of the filter. And an oil collecting device, characterized in that the oil collecting device has a second deformed portion.
According to this, a part of the rising part of the oil collecting member has a part away from the peripheral edge part of the filter, so that the recovered oil is prevented from repeatedly circulating and the oil is kept at an intended place. Therefore, it is possible to provide an oil collecting device in which a large amount of oil does not flow at a position where it can come into contact with the filter.

Further, when the motor rotates the filter, the oil contained in the air collides with the surface portion of the filter, is scattered toward the oil collecting member located around the filter, and is collected by the oil collecting member. This may be a feature.
According to this, the oil collection device which has high oil collection efficiency in a state where pressure loss is small can be provided. That is, by rotating the filter at high speed, the oil contained in the air collides with the surface of the filter and is scattered toward the oil collecting member located in the surrounding area, causing the oil to adhere to the filter and cause clogging. Less. This reduces the cleaning effort of the filter itself and prevents pressure loss from increasing as it is used. In addition, the oil flow hardly adheres to the downstream part of the filter in the air flow path, so the downstream part of the filter is cleaned. / It is possible to provide an oil collecting device that greatly reduces the labor of washing.

Moreover, in order to solve the said subject, a range hood provided with said oil collection apparatus can be provided.
According to this, while realizing high oil collection efficiency, it is possible to reliably collect the oil that has been captured and scattered by the filter, suppress the repeated circulation of the collected oil, and keep the oil at the intended location. Thus, it is possible to provide a range hood in which a large amount of oil does not flow at a position where it may come into contact with the filter.

  As described above, according to the present invention, the recovered oil is prevented from repeatedly circulating and the oil is retained at the intended place, so that a large amount of oil flows at a position where the oil may contact the filter. It is possible to provide an oil collecting device and a range hood which are prevented from being used.

(A) Front view, (B) Plan view, (C) Bottom view, (D) Right side view, (E) Perspective view seen from the lower right, (F) ) Perspective view seen from the upper right. The perspective view seen from the lower right of the range hood of the first embodiment according to the present invention when the current plate is removed. Sectional drawing (in the II cross section of FIG. 1 (A)) of the range hood of the 1st Example which concerns on this invention. (A) Front view, (B) Plan view, (C) Bottom view, (D) Right side view, (E) Perspective view seen from the lower right of the oil collecting apparatus of the first embodiment according to the present invention, (F) The perspective view seen from the upper right. 1 is an exploded perspective view of an oil collecting device according to a first embodiment of the present invention. The (A) expansion exploded perspective view and (B) action explanatory view of the oil collecting device of the 1st example concerning the present invention. BRIEF DESCRIPTION OF THE DRAWINGS (A) sectional drawing of the oil collecting apparatus of 1st Example which concerns on this invention, (B) Sectional drawing of a variation. The (A) perspective view and (B) action explanatory view of the oil content collection member of the modification of the 1st example concerning the present invention. (A) perspective view of oil collecting member of second embodiment according to the present invention, (B) action explanatory view, (C) perspective view when combined with first embodiment, (D) first embodiment and Action | operation explanatory drawing at the time of combining. Action | operation explanatory drawing in the range hood of the 3rd Example which concerns on this invention. The action explanation enlarged view in the range hood of the 3rd example concerning the present invention. Explanatory drawing which shows the modification of the shape of the hole of the filter which concerns on this invention. The graph which shows the relationship between the hole diameter average passage time and the collection rate in 4th Example of the cooker hood which concerns on this invention. The test block diagram used for the test for obtaining the relationship between the collection rate in a filter, and the oil adhesion to a downstream part in 4th Example of the range hood which concerns on this invention, and a prior art. (A) expansion exploded perspective view, (B) action explanatory drawing, (C) sectional drawing of the oil collecting apparatus of a prior art.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
<First Example>
With reference to FIG. 1 thru | or FIG. 3, the range hood 1 concerning a present Example is demonstrated. The range hood 1 has a thin hood portion 2 having a concave inner surface panel 5 on the inner surface for collecting steam, oily smoke and the like generated by cooking performed below or around. The hood portion 2 is connected to a blower box 3 connected to an exhaust duct (not shown) in the vicinity of the communication port 6 located on the upper rear side. The blower box 3 includes a fan 4 that is a sirocco fan and generates an air flow D1. Therefore, when the fan 4 is operated, the communication port 6 becomes negative pressure, and the air below the inner panel 5 is sucked through the communication port 6 and discharged to the outside through the exhaust duct. The communication port 6 communicates with the fan 4, and is located on the flow path of the air flow D <b> 1 generated by the fan 4 and on the upstream side of the air flow from the fan 4.

  The communication port 6 has a mounting plate 50 attached so as not to generate a gap that can be an air flow path between the inner surface panel 5, a disk-shaped filter 10 having a hole through which the air flow D <b> 1 passes, and a filter The rotating shaft is connected to the center of the disk 10, the motor 20 rotates the filter 10, the motor mounting tool 40 for mounting the motor 20 to the mounting plate 50, and the mounting plate 50 is attached to the outer peripheral edge of the filter 10. There is an oil collecting device 100 including an oil collecting member 30 that surrounds. Accordingly, the range hood 1 is on the flow path of the air flow D1 generated by the fan 4 and is present on the upstream side of the flow from the fan 4, and the hole through which the air flow passes from the bottom to the top in the drawing. The filter 10 having the above is rotatably provided.

  The air below the inner panel 5 contains steam, oily smoke, etc. generated by cooking. When the fan 4 is operated, it exists in the communication port 6, that is, on the flow path of the air flow D <b> 1 generated by the fan 4. Thus, the air is sucked into the hole of the filter 10 located on the upstream side of the fan 4 and passes through the hole. The filter 10 is rotatably provided by the electric motor 20, and when the range hood 1 is operated, the fan 4 generates the air flow D1 and the electric motor 20 rotates the filter 10. The range hood 1 collects oil contained in the air in the oil collecting member 30 by rotating the filter 10. How to collect will be described later.

  Such a range hood 1 uses a conventional slot filter, HEPA filter, etc., and has a small pressure loss as compared to improving the oil collecting efficiency by making slits and eyes fine or overlapping to form a multilayer. It can have high oil collection efficiency in the state. That is, when the oil collecting efficiency is improved by using a conventional slot filter, HEPA filter, or the like, or by making the slits finer or overlapping to form a multi-layer, the air passage of the filter has a complicated flow path. However, in the case of such a range hood 1, the oil collecting efficiency is increased by the rotation of the filter, so that it is not necessary to form such a complicated flow path. . Therefore, it is possible to obtain a high oil collection efficiency while maintaining a low ventilation resistance as compared with the conventional filter. In addition, the filter is less likely to clog due to oil adhering to the filter, thereby reducing the cleaning effort of the filter itself and preventing an increase in pressure loss as it is used. Since the oil hardly adheres to the downstream portion, it is possible to provide a range hood that greatly reduces the trouble of cleaning / washing the downstream portion from the filter.

  The type of the fan 4 is not particularly limited, and may be another fan such as an axial fan that generates an air flow. Preferably, it is a sirocco fan with a high static pressure used for the present Example. Further, below the hood portion 2, a rectifying plate 7 that is detachable from the hood portion 2 and has a gap between the hood portion 2 and increases the suction force is provided. Although the range hood 1 in the present embodiment includes the current plate 7, the presence of the current plate 7 is not particularly limited and may or may not be present. When there is no current plate or when the current plate is removed, as shown in FIG. 2, the upper inner surface of the hood portion 2 is attached so that there is no gap between the inner surface panel 5 and the inner surface panel 5. The attached mounting plate 50, the disk-shaped filter 10, and the oil collecting member 30 attached to the mounting plate 50 and provided to surround the outer peripheral edge of the filter 10 can be directly recognized by the user.

  With reference to FIG. 4 and FIG. 5, the oil collection apparatus 100 in a present Example is demonstrated. The oil collecting device 100 includes a mounting plate 50 attached to a communication port, a disk-shaped filter 10 having a hole 11 through which air flows, and a shaft 21 connected to the center of the disk of the filter 10. An electric motor 20 to be rotated, an electric motor attachment 40 for attaching the electric motor 20 to the attachment plate 50, and an oil collecting member 30 attached to the attachment plate 50 and provided to surround the filter 10.

  The mounting plate 50 is formed from a substantially square flat plate having a circular opening in which the filter 10 can be disposed at the center. The attachment plate 50 and the communication port are attached without a gap or the like, and the air flow does not pass through this attachment portion. Therefore, the circular opening is the only part that allows the air flow generated by the fan to pass through, and this opening is the flow path for the air flow generated by the fan. The mounting plate 50 may be formed integrally with the inner surface panel 5. Further, the attachment plate 50 includes two rectifying plate attachments 51 for attaching the rectifying plate 7.

  The electric motor attachment 40 is provided on the downstream side of the air flow of the attachment plate 50 so as to straddle the opening. The electric motor attachment 40 has a hole (not shown) for allowing the shaft 21 of the electric motor 20 to pass through in a substantially central portion, and is attached to the attachment plate 50 so that the hole becomes the center of the opening in a plan view. .

  The electric motor 20 is fixed to the electric motor fixture 40 by passing the shaft 21 through the hole of the electric motor fixture 40 from the downstream side to the upstream side of the air flow D1 (see FIG. 3). The shaft 21 of the electric motor 20 is the center of the circular opening of the mounting plate 50.

  The filter 10 is detachably attached to the distal end portion of the shaft 21 of the electric motor 20 by the detachable tool 13 so that the surface of the filter 10 is perpendicular to the shaft 21. The outer shape of the filter 10 is circular, and the filter 10 is attached to the shaft 21 of the electric motor 20 located at the center of the circular opening of the mounting plate 50 at the center of the filter 10. The outer shape is a concentric circle, and the diameter of the filter 10 is slightly smaller than the diameter of the opening.

  The filter 10 is formed of a circular metal plate having a hole 11, is bent circumferentially inside the peripheral edge 12 that is the outer periphery of the filter 10, and the peripheral edge 12 is formed by the filter 10 having the hole 11. Compared with the surface portion, it is located below in the vertical direction. By doing so, when the oil content captured by the surface portion of the filter 10 is guided to the peripheral edge portion 12, the position where the oil content is scattered can be adjusted. Of course, the filter may be a simple circular flat plate without being bent in this way.

  The hole 11 of the filter 10 is formed of a slit that is closer to the center in the radial direction and gradually approaches the circumferential direction toward the outer periphery. Moreover, the length of the slit is also shorter at the center and is gradually increased as it goes to the outer periphery. In the case of this example, the circumferential width of the slit is approximately 1.5 mm. The shape, size and arrangement of the holes are not limited to this. For example, the hole arrangement may be any arrangement, such as holes being drilled at the vertices of regular triangles, holes being drilled at the vertices of regular squares, or irregularly randomly. The shape of the hole may be any shape such as a circle, a triangle, a square, or a regular polygon.

  The oil collecting member 30 is disposed so as to surround the outer periphery and the lower periphery of the peripheral edge 12 of the filter 10. The oil collecting member 30 has a ventilation opening 35, captures oil contained in the air flowing therein at the surface of the filter 10, and collects oil or the like scattered on the outer periphery by centrifugal force. The oil collecting member 30 extends inward from the inner wall 32 at the lower end portion of the inner wall 32 in order to prevent the oil and fat from dripping from the range hood, and the inner wall 32 that catches and scatters the oil that surrounds the peripheral edge 12. The filter 10 includes an extending portion 33 that covers the lower side of the peripheral edge portion 12 of the filter 10, and a rising portion 34 that rises from the inner edge end portion of the extending portion 33 toward the filter 10 so as to surround the ventilation opening 35. An oil sump 31 is provided for retaining the oil scattered from 10.

  In the oil collecting device 100, as shown in FIG. 5, the user can easily attach and detach the oil collecting member 30 and the filter 10. Since the oil collecting member 30 is fitted and held in a recess formed corresponding to the outer shape of the oil collecting member 30 provided on the mounting plate 50, it can be easily attached and detached in the vertical direction. Further, the filter 10 is integrated with the detachable tool 13, and is held by the detachable tool 13 being engaged with the shaft 21 of the electric motor 20. The user can easily operate the detachable tool 13 in the vertical direction. Detachable. According to this, the user can use the oil collecting device 100 for a while to easily collect the oil collected in the oil reservoir 31, and wash the oil collecting member 30 and the filter 10 that are soiled with oil or the like. it can.

  Prior to describing the oil collecting member 30 of the present embodiment in detail, a conventional oil collecting member 30Z will be described with reference to FIG. The oil collecting member 30Z has an inner wall 32Z that surrounds the peripheral edge portion 12Z of the rotating filter 10Z connected to the electric motor 20Z at an approximately equal distance. That is, the inner wall 32Z is disposed so as to surround the entire periphery of the peripheral edge portion 12Z of the filter 10Z. The oil collecting member 30Z has a lower end portion 322Z of the inner wall 32Z, an extending portion 33Z extending inward from the inner wall 32Z, and a rising portion rising from the inner edge end portion 333Z of the extending portion 33Z toward the filter 10Z. 34Z.

  In this prior art oil collecting member 30Z, as shown in this figure (B), the oil and fat collected on the upper surface of the extending portion 33Z starts to accumulate as it is used. A swirling flow (direction TD) generated by the rotation of the filter 10Z exists inside the oil collecting member 30Z, which is at a short distance from the peripheral edge 12Z of the filter 10Z. ) In the oil collecting member 30Z, particularly the upper surface of the extending portion 33Z, the lower end portion 322Z that is a connecting portion between the extending portion 33Z and the inner wall 32Z, and the connecting portion between the extending portion 33Z and the rising portion 34Z. It flows so as to go around at an inner edge end portion 333Z. Therefore, the amount of oil that gradually flows increases, and as shown in FIG. 3C, the oil comes into contact with the disk-shaped filter 10Z, which adversely affects the normal operation of the filter 10Z.

On the other hand, the oil collecting member 30 in the present embodiment is as follows. This will be described with reference to FIGS. The oil collecting member 30 is formed such that the shortest distance (W _n ) between the inner wall 32 that surrounds the peripheral edge 12 of the rotating filter 10 connected to the electric motor 20 at substantially the same distance W1 and the peripheral edge 12 changes. A first deformed portion 323 having a shortest distance between the inner wall 32 surrounding the peripheral end portion 12 of the filter 10 and the peripheral end portion 12 of the filter 10.

  The oil collecting member 30 includes a lower end portion 322 of the inner wall 32, an extending portion 33 that extends inward from the inner wall 32, and a rising portion that rises toward the filter 10 from the inner edge end portion 333 of the extending portion 33. 34. The oil collecting member 30 is disposed so as to surround the entire periphery of the peripheral edge 12 with the inner wall 32 and the first deformed portion 323. The shortest distance between the first deformed portion 323 and the peripheral edge portion 12 is larger than the shortest distance between the inner wall 32 and the peripheral edge portion 12, which is the other portion.

Specifically, the inner wall 32 surrounds the peripheral edge 12 of the filter 10 over substantially a semicircle (a semicircle on the front side, which is the left side in FIG. 6) while maintaining the shortest distance W1. On the other hand, the first deformed portion 323 forms the peripheral edge 12 with the shortest distance (for example, W _n1 , W _n2 , W _n3 , W _n4 in FIG. 6B) larger than the shortest distance W1 on the inner wall 32. surround. In the present embodiment, the first deformed portion 323 has a curvature larger than the curvature of the inner wall 32 in order to increase the capacity of the place where the oil is retained by taking a large portion away from the peripheral edge 12 of the filter 10. It has a corner 324. Therefore, the shortest distance W _{n2 at} the corner portion 324 is the largest, that is, farthest from the peripheral end portion 12.

Further, in this embodiment, the oil collecting member is easy to mold, and the first deformed portion 323 is further provided with two corner portions 324 in total for reducing the manufacturing cost. Only the flat surface portion 325 having zero curvature is provided. As a result, the shortest distance W _n4 to the peripheral edge portion 12 in the plane portion 325 is substantially equal to the shortest distance W1 in the inner wall 32. In addition, the shortest distance W _n1 in the first deformed portion 323 between the corner portion 324 and the inner wall 32 gradually increases from the corner portion 324 and the inner wall 32 and the boundary portion toward the corner portion 324. Further, the shortest distance W _n3 in the first deformed portion 323 between the corner portion 324 and the portion having the shortest distance W _n4 to the peripheral edge portion 12 in the flat surface portion 325 is the shortest distance to the peripheral edge portion 12 in the flat surface portion 325. The distance gradually increases from the position having the distance W _n4 toward the corner 324.

  In the inner wall 32 and the extending portion 33 extending from the inner wall 32, the oil flows so as to circulate in the rotational direction TD of the filter 10A, as in the oil collecting member 30Z of the prior art. On the other hand, the shortest distance gradually increases from the shortest distance W1 with the peripheral edge 12, that is, the corner portion that is a part of the extending portion 33 due to the first deformed portion 323 that is separated from the peripheral edge 12. In the vicinity 332, a so-called so-called oil sump, that is, an oil sump 31 is intentionally formed. Thereby, it can suppress that the collect | recovered oil circulates repeatedly, can hold | maintain oil to the place which intends, and can prevent much oil from flowing to the position which may contact a filter.

  The distance in the vertical direction between the extending portion 33Z and the peripheral edge portion 12Z of the filter 10Z in the prior art is constant, but in the present embodiment, the distance changes. That is, the vertical distance L2 between the extended portion 33 and the peripheral edge 12 on the back side where the corner portion 332 is located is equal to the vertical distance L1 between the extended portion 33 and the peripheral edge 12 on the front side. Bigger than that. That is, the vertical distance L2 between the upper surface 331 of the extending portion 33 and the peripheral edge portion 12 facing the peripheral edge portion 12 in the extending portion 33 in the vicinity of the corner portion 332 on the back side is the rotation center of the filter 10. It is larger than the distance in the vertical direction between the upper surface 331 and the peripheral edge portion 12 in the extending portion 33 on the front side which is a position facing the corner portion 324 across the sandwiched portion. In this way, by providing a place (oil sump) for retaining oil at a relatively low position in the vertical direction, it is possible to retain the oil more and to contact the filter even if the oil accumulates in that place. Can be prevented.

  There are various ways to change the distance in the vertical direction between the upper surface of the extension portion 33 and the peripheral edge portion 12, and the entire extension portion 33 is inclined with respect to the filter 10 as shown in FIG. Thus, the vertical distance L2 between the extending portion 33 and the peripheral edge portion 12 on the back side may be larger than the vertical distance L1 between the extending portion 33 and the peripheral edge portion 12 on the front side. . Further, as shown in FIG. 7B, the oil collecting member 30 ′ has an extending portion 33 ′ that is bent in the middle, and has a portion that inclines a portion parallel to the filter 10. Thus, L2 may be made larger than L1. In any case, the distance between the upper end of the rising portion 34/34 'and the filter 10 is constant so as not to disturb the air flow regardless of the front side or the back side. The inner wall 32 positioned outside the peripheral edge 12 of the filter 10 and the upper end 321 of the first deformed portion 323 are preferably in contact with and closely attached to the mounting plate 50 so that the collected oil does not leak. .

<Modification of the first embodiment>
A modification of the present embodiment will be described with reference to FIG. In the oil collecting member 30 of the present modified example, the extended portion 33 in the middle between the boundary portion 326 between the inner wall 32 and the first deformed portion 323 and the corner portion 324 has a lower corner portion 324 in the vertical direction. Thus, a step 334 is provided. In other words, the step 334 is provided on one side of the extending portion 33 in the vicinity of the corner portion 332 that becomes the oil reservoir 31. According to this, by providing the step 334, it is possible to prevent the oil that rotates so as to circulate past the oil reservoir 31 and further rotate. The step 334 may be on only one side of the extending portion of the corner vicinity 332 or on both sides.

<Second Example>
With reference to FIG. 9, the oil collection apparatus 100A of the present embodiment will be described. In order to avoid duplication, the description will focus on differences from the first embodiment. Since the components other than the oil collecting member 30A are the same as those in the above embodiment, FIG. 9 shows only the oil collecting member 30A.

  30A of oil content collection members shown to this figure (A) and (B) are arrange | positioned so that the circumference | surroundings of 12 A of outer periphery edges of filter 10A, and the lower periphery may be surrounded. The oil collecting member 30A has a ventilation opening 35A, captures oil contained in the air flowing through the surface of the filter 10A, and collects oil and the like scattered on the outer periphery by centrifugal force. The oil collecting member 30A extends inward from the inner wall 32A at the lower end of the inner wall 32A in order to prevent the oil and fat from dripping from the range hood, and the inner wall 32A that receives the oil scattered around the peripheral edge 12A. And an extending portion 33A that covers the lower side of the peripheral edge portion 12A of the filter 10A and a rising portion 34A that rises from the inner edge end portion of the extending portion 33A toward the filter 10A so as to surround the ventilation opening portion 35A. An oil sump 31A for retaining oil scattered from 10A is provided.

The rising portion 34A is formed so that the shortest distance (w _n ) between the outer wall 342A that surrounds the inner side of the peripheral edge 12A of the filter 10A from the inner side at approximately the same distance w1 and the peripheral edge 12A changes. The rising portion 34A has a second deformed portion 341A in which the shortest distance between the outer wall 342A of the rising portion and the peripheral edge portion is different. Specifically, the outer wall 342A surrounds the peripheral edge portion 12A of the filter 10A from the inside over a substantially semicircle (the semicircle on the front side on the left side in the figure (B)) while maintaining the shortest distance w1. It is out.

On the other hand, the second profiled portion 341A is larger the shortest distance from the shortest distance w1 of the outside wall 342A (e.g., the diagram (w _n1, w _n2 in B)) and I following, surrounds the peripheral edge 12A from the inside. In the present embodiment, the second deformed portion 341A is partially smaller than the curvature of the outer wall 342A in order to increase the capacity of the place where oil is retained by taking a large portion away from the inside of the peripheral edge portion 12A of the filter 10A. By having a curvature (including a plane), it is separated from the inside of the peripheral end 12A. Since the second deformed portion 341A in this embodiment is substantially flat, the shortest distance from the inside of the peripheral edge 12A is the largest on the back side (w _n2 ). The shortest distance (w _n2 ) at the intermediate part from the boundary between the outer side wall 342A and the second deformed part 341A to the back side gradually increases toward the back side so that w1 <w _n1 <w _n2 .

  In the inner wall 32A and the extending portion 33A extending from the inner wall 32A, oil flows so as to circulate in the rotation direction TD of the filter 10A. On the other hand, since the shortest distance gradually increases from the shortest distance w1 to the inside of the peripheral edge portion 12A, that is, there is a second deformed portion 341A that is separated from the peripheral edge portion 12A, the so-called oil of the oil is intentionally present there. A blowing pool, that is, an oil pool 31A is formed. As a result, the part of the rising portion 34A that is separated from the peripheral edge portion 12A of the filter 10A can suppress the collected oil from circulating repeatedly, and can keep the oil at the intended location.

  In addition, as shown to this figure (C) and (D), you may combine a present Example and a 1st Example. That is, the oil collecting member has a second deformed portion 341A ′ having different shortest distances between the outer wall 342A ′ of the rising portion 34A ′ and the peripheral edge 12A, and the inner wall 32A ′ surrounding the peripheral edge 12A and the filter. You may have 1st deformed part 323A 'from which the shortest distance with peripheral edge part 12A differs. If it carries out like this, it will become possible to hold | suppress that the collect | recovered oil will carry out the revolving flow | circulation repeatedly by both effect | actions, and to keep an oil in the intended place.

<Third embodiment>
FIGS. 10 and 11 illustrate the action of collecting the oil accompanying the air flow in the range hood 1B with respect to the range hood 1B according to the present embodiment. The range hood 1B includes an oil collecting device 100B, a fan 4B that generates an air flow A, and an inner panel 5B having a communication port 6B that communicates with the fan 4B. The oil collecting device 100B includes a mounting plate 50B attached to the communication port 6B, a disk-shaped filter 10B having a hole 11B through which air flow A passes, and a shaft 21B connected to the center of the disk of the filter 10B. An electric motor 20B for rotating 10B, an electric motor attachment 40B for attaching the electric motor 20B to the attachment plate 50B, and an oil collecting member 30B attached to the attachment plate 50B and positioned around the filter 10B. The oil collecting device 100B is located at the communication port 6B, and is provided on the upstream side of the fan 4B on the flow path of the air flow A.

  FIG. 10 shows the action of the air flow in the entire range hood 1B. The warmed air rises toward the range hood 1B together with steam, oily smoke, etc. generated by cooking performed below the range hood 1B. When the range hood 1B starts operation and the fan 4B starts to rotate, the fan 4B generates an air flow from the bottom to the top in the drawing. Then, the air rising around the rectifying plate 7B is sucked from between the rectifying plate 7B and the inner panel 5B, and then passes through the hole 11B of the filter 10B and is sucked into the suction port 42B of the fan 4B in the fan casing. . Then, the air is discharged from the blower box 3B to the exhaust duct D.

  The rotational speed per unit time of the filter 10B may be at least 230 rpm (Rotation Per Minute) or more, although it depends on the opening state of the filter hole. Details such as the relationship with the opening state of the holes will be described later. When the filter 10B rotates at such a relatively high speed, the surface of the filter 10B (the surface portion 14B, which is a portion without the hole 11B) drags the air in contact with the surface by frictional force, and the air viscosity changes to the nearby air. However, since the movement is transmitted, an air movement is generated in the vicinity of the surface of the filter 10B, and the filter 10B is rotating. Therefore, the air movement becomes a vortex centered on the rotation axis.

  This spiral air movement occurs on both surfaces of the filter 10B, that is, both the lower surface and the upper surface of the filter 10B, in other words, both the upstream surface and the downstream surface of the air flow A of the filter 10B. In the present embodiment, since the air flow A generated by the fan 4B flows from the bottom to the top through the hole 11B of the filter 10B in the drawing, the movement of the vortex air flows downstream of the filter 10B. While being separated from the surface of the filter 10B, a spiral flow toward the outer peripheral edge of the filter 10B is generated and sucked by the fan 4B. On the other hand, on the upstream side of the filter 10B, the movement of the spiral air is pressed against the surface of the filter 10B, and a high-density air layer with a spiral flow toward the outer peripheral edge of the filter 10B is formed.

  FIG. 11 shows the action of the air flow in the oil collecting device 100B. The oil component OP1 generated by cooking or the like flows along with the air flow A and reaches the vicinity of the upstream surface (surface portion 14B) of the filter 10B. The oil component OP2 that has reached the vicinity of the upstream side is partly (oil component with a small particle diameter) due to a spiral flow toward the outer periphery of the dense air layer, and the other part (oil component with a large particle diameter) is By colliding with the upstream surface of the filter 10B (surface portion 14B, which is a portion without the hole 11B), it is blown off in the direction of the peripheral edge 12B of the filter 10B. As a result, the oil is collected as the oil OP3 on the inner wall 32B of the oil collecting member 30B provided so as to surround the peripheral edge 12B of the disc-shaped filter 10B, and is collected as the oil OL in the oil reservoir 31B.

  As shown in FIG. 12, the diameter DA (m) in the circumferential direction of the hole is the maximum value of the length of the arc sandwiched between both ends of the hole in a concentric circle that crosses the hole centered on the rotation center of the filter. Say. The hole diameter passing time is expressed as DA / Vx (seconds) when the peripheral speed at the distance Rx (m) from the rotation center is Vx (m / second). The pore diameter average passage time tx (seconds) is an average of the pore diameter passage times over the entire filter, and is represented by the equation (1). Here, the radius outside the region where the holes in the filter are present is Rmax (m), the radius inside the region where the holes are in the filter is Rmin (m), and the number of rotations per second of the filter is N (/ second). Let the angular velocity of the filter be ω (radians / second). In addition, the area | region with a hole on a filter exists concentrically centering on a rotating shaft, and a hole shall be distributed uniformly in the area | region. The hole diameter passage time is DA / 2πNRx, and the hole diameter average passage time tx is as follows.

  In other words, the average hole diameter passage time is the average value of the filter for the time required for one end and the other end of the diameter of the filter hole in the circumferential direction to pass through one point on a certain circumference. For convenience, in the region where the hole exists, the length of the arc in the circumferential direction across the hole existing in the radial position where the inner and outer areas are the same, that is, the length of the diameter in the circumferential direction of the hole It can be said that it is the time required to move. This will be described with reference to FIG. The circular hole 11 moves in the circumferential direction at a speed of V (m / sec) while drawing an arc from the left to the right in the drawing centering on the rotation center (not shown) of the filter. Points α and β are points on the outer circumference of the hole 11 and on the same circumference of the center of rotation, and point γ is a midpoint of the arc αβ. Accordingly, the points α and β are one end and the other end of the diameter of the hole 11 in the circumferential direction.

Since the diameter of the hole 11 in the circumferential direction is the maximum value of the length of the arc sandwiched between both ends of the hole 11 in the concentric circles that cross the hole 11, the length of the arc αβ is the maximum value. This is a case where the straight line connecting the points α and β is the diameter of the hole 11. In this case, the length of the arc αγβ is DA. The time required for one end (point α) and the other end (point β) of the diameter of the hole 11 in the circumferential direction to pass one point (point γ) on a certain circumference is the point β is the point γ Is the time from when the point α passes the point γ. Further, when the radius outside the region where the hole exists in the filter is Rmax (not shown) and the radius inside the region where the hole exists in the filter is Rmin (not shown), the region where the hole exists , Outside Rmin and inside Rmax, and the width is (Rmax−Rmin). The radial position Rctr (not shown) having the same area on the inner side and the outer side satisfies the following expression.

πRmax ² −πRctr ² = πRctr ² −πRmin ²

The peripheral speed Vav of the hole 11 is obtained by integrating the total value of the peripheral speeds of the mass points arranged on the same circumference around the rotation center of the filter from Rmin to Rmax, and the integrated value is calculated for the hole in the filter. It can also be obtained by dividing by the area of the existing region (region from Rmin to Rmax). Specifically, the peripheral speed Vav of the hole 11 satisfies the following formula.

Vav = 4πN (Rmax ² + RmaxRmin + Rmin ² ) / 3 (Rmax + Rmin)

  Based on the circumferential velocity obtained as described above and the length of the arc at Rctr, the time required for one end and the other end of the diameter in the circumferential direction of the hole to pass through one point on a certain circumference. An average value in the filter can be obtained.

  Even in a filter in which all the same holes are uniformly arranged in one filter as in this embodiment, and in a filter in which holes having different shapes and sizes are arranged in one filter, Find the arc length and the peripheral speed at the hole position (distance from the center of rotation), and each hole moves the arc length of each hole (diameter in the circumferential direction) The average time in the filter of the time required for one end and the other end of the diameter in the circumferential direction of the hole to pass one point on a certain circumference is obtained by calculating the time required for The value can be determined.

  FIGS. 12B1 and 12B2 show a filter 10B having holes of slits 11B having the same slit width. However, these slits 11B are formed from slits that are closer to the center in the radial direction and gradually approach the circumferential direction toward the outer periphery. Then, even if they have the same slit width, the DA in the portion close to the center portion of the filter 10B and the portion close to the outer edge are different. However, even in such a case, as described above, by obtaining the average value in the filter 10B, the time required to pass one point on the circumference can be obtained.

FIG. 13 is a graph showing the relationship between the average pore diameter passage time tx and the collection rate in the range hood according to the present invention. Each plot on the graph shows the average pore diameter passage time and collection rate as measured by rotating filters of various pore sizes at various revolutions per unit time. A regression curve (second-order polynomial regression curve, R ² = 0.97) was drawn so that the R-square value was the maximum for the plot on the graph. According to this, the average collection time exceeding 70%, which is the best collection rate among the conventional filters, is according to the dotted regression curve considering the error of about 3% in the average pore diameter passage time. It is 3.2 × 10 ⁻⁴ seconds, and preferably the average pore diameter passage time is about 2.7 × 10 ⁻⁴ seconds by a solid regression curve. Therefore, if the average pore diameter passage time is 3.2 × 10 ⁻⁴ seconds or less, a range hood with high oil collection efficiency can be provided.

As apparent from the equation (1), the average pore diameter passage time tx decreases as the rotational speed N of the filter increases or when the hole diameter DA decreases. Therefore, the range hood according to the present invention is capable of adjusting the average pore diameter passage time using the filter rotation speed and the filter hole diameter as parameters. Since the regression curve descends to the lower right, in order to improve the collection rate, it is preferable to decrease the average pore diameter passage time. Accordingly, in order to obtain a collection rate of about 80%, it may be about 1.8 × 10 ⁻⁴ seconds, and preferably about 1.5 × 10 ⁻⁴ seconds. Moreover, in order to make a collection rate into about 90%, it is about 0.98 * 10 <^-4> second, Preferably it is good also as about 8.0 * 10 <^-5> second.

  Table 1 shows the relationship between the hole diameter (mm) and the rotational speed (rpm) of the filter and the collection rate in this example. The hole was circular, and the collection rate was measured with four types of hole diameters of 0.75 mm, 1 mm, 1.5 mm, and 2 mm. When the rotational speed of the filter is 0 rpm, it can be seen that the collection efficiency is less than 70% which is the best collection rate of the conventional filters at any hole diameter, and the filter not rotating is not high.

  On the other hand, when the filter is rotated at 1000 rpm, the trapping rate is 77% even in the filter having the lowest trapping rate of 2 mm, which exceeds the trapping rate of the conventional best filter. Moreover, as the hole diameter decreases to 1.5 mm, 1 mm, and 0.75 mm, the collection rate further increases to 80%, 86%, and 88%. Furthermore, when the rotation speed of the filter is 1500 rpm, the collection rate becomes higher as 84%, 86%, 91%, and 93% as the hole diameter decreases to 2mm, 1.5mm, 1mm, and 0.75mm. Become. Furthermore, when the rotational speed of the filter is 2000 rpm, the collection rate becomes 88%, 90%, and 90% as the hole diameter decreases to 2 mm, 1.5 mm, and 1 mm. Therefore, the range hood which concerns on this invention collects the oil component contained in air, when a fan rotates a filter, generating the flow of air. Furthermore, it can be seen that when the number of rotations per unit time of the filter is increased or the pore diameter is decreased, high oil collection efficiency can be obtained.

As described above, the average pore diameter passage time exceeding the collection rate of 70% is 3.2 × 10 ⁻⁴ seconds, and this average pore diameter passage time is determined by the combination of the pore diameter and the rotational speed of the filter. If it does so, in the case of the combination of the following hole diameters and rotation speeds, a hole diameter average will be 3.2x10 <^-4> second and the collection rate of 70% is realizable. That is,
-The hole diameter, that is, the diameter in the circumferential direction of the hole is 0.75 mm or less, and the rotational speed of the filter is 230 rpm or more, or
-The hole diameter is 1.00 mm or less and the rotational speed of the filter is 310 rpm or more, or
-The hole diameter is 1.50 mm or less and the rotational speed of the filter is 460 rpm or more, or
-The hole diameter is 2.00 mm or less and the rotational speed of the filter is 620 rpm or more, or
-A range hood with high oil collection efficiency can be provided when the hole diameter is 5.00 mm or less and the rotational speed of the filter is 1500 rpm or more.

More preferably, the average pore diameter passage time exceeding 70% is 2.7 × 10 ⁻⁴ seconds. Then, similarly,
-The hole diameter, that is, the diameter in the circumferential direction of the hole is 0.75 mm or less, and the rotational speed of the filter is 270 rpm or more, or
-The hole diameter is 1.00 mm or less and the rotational speed of the filter is 360 rpm or more, or
-The hole diameter is 1.50 mm or less and the rotational speed of the filter is 540 rpm or more, or
-The hole diameter is 2.00 mm or less and the rotational speed of the filter is 720 rpm or more, or
-A range hood with high oil collection efficiency can be provided when the hole diameter is 5.00 mm or less and the rotational speed of the filter is 1800 rpm or more.

  In addition, when the oil component collides with the upstream surface of the filter (the surface portion of the portion without holes), most of the oil component is blown off in the direction of the outer peripheral edge of the filter, but a part of the oil component may adhere to the surface. is there. When the rotational speed of the filter increases, the oil once adhered to the filter surface is blown away in the direction of the outer peripheral edge by centrifugal force. As a result, the range hood according to the present invention can reduce the cleaning effort of the filter itself by less oil remaining on the filter.

  As described above, in the oil collecting device 100B, the motor 20B rotates the filter 10B, so that the oil contained in the air collides with the surface portion of the filter 10B, and the oil collecting member located around the filter 10B. It is scattered toward 30B and collected by the oil collecting member 30B. According to this, the oil collection device which has high oil collection efficiency in a state where pressure loss is small can be provided. That is, by rotating the filter at high speed, the oil contained in the air collides with the surface of the filter and is scattered toward the oil collecting member located in the surrounding area, causing the oil to adhere to the filter and cause clogging. Less. This reduces the cleaning effort of the filter itself and prevents pressure loss from increasing as it is used. In addition, the oil flow hardly adheres to the downstream part of the filter in the air flow path, so the downstream part of the filter is cleaned. / A range hood can be provided that greatly reduces the hassle of washing.

  FIG. 14 shows the test configuration used in the test for obtaining the relationship between the collection rate of the filter in the range hood using the present embodiment and the conventional type slot filter, and the oil adhesion to the downstream parts such as the fan and the duct. FIG. Using the fact that the collection rate varies depending on the difference in the pore diameter of the filter of this example, and to check the oil adhesion state to the downstream parts due to the difference in the collection rate of the filter, the following test was conducted. .

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

  The results of this test are shown in Table 2. According to this test, in a range hood using a slot filter which is a conventional type range hood, 50% of oil is collected in the filter, and 23% of oil is attached to downstream parts. The remaining 27% of oil is discharged to the outside together with air. On the other hand, in the range hood of the present embodiment, which includes a filter having a pore diameter of 2.0 mm, 83% of the oil is collected in the filter, and 7% of the oil is attached to the downstream part. Moreover, in a range hood provided with a filter having a hole diameter of 1.5 mm, 83% of oil is collected in the filter, and 2% of oil is attached to downstream parts. In addition, in a range hood provided with a filter having a pore diameter of 1.0 mm, 87% of oil is collected in the filter, and surprisingly, no oil adheres to downstream parts.

  According to this test, compared with the collection rate of the conventional type range hood, in the range hood according to the present example, the collection rate at the filter is clearly high at 83% or more. As a result, it is possible to remarkably suppress oil from adhering to downstream parts that are troublesome for cleaning / washing. Considering that the collection rate of the conventionally known range hood is 70% at the best, the range hood according to the present invention used in this test is 83% or more despite the change in the pore diameter. It has a collection rate, and it can be said that the range hood according to the present invention has a high collection efficiency. Therefore, in the range hood according to the present invention, the oil component hardly adheres to the downstream portion of the filter in the air flow path, and therefore the labor for cleaning / washing the downstream portion of the filter can be greatly reduced.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible. That is, the invention has been illustrated and described with particular reference to particular embodiments, but with respect to the embodiments described above, without departing from the scope and spirit of the invention, the shape, material Various modifications can be made by those skilled in the art in terms of quantity, other details, and the like. Therefore, the description limited to the shape disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description in the name of the member excluding a part or all of the limitation is included in the present invention.

  For example, the oil collecting device is used by being incorporated in the range hood in the above, but it has been described as an example in which the oil collecting device is most effectively used, and it is not limited thereto. There is no. For example, the oil collecting device may be used as a device that collects oil and fat in air containing oil and fat as a separate body from the range hood.

DESCRIPTION OF SYMBOLS 1 Range hood 2 Hood part 3 Blower box 4 Fan 5 Inner panel 6 Communication port 7 Current plate 10 Filter 11 Hole 12 Perimeter edge part 13 Detachment tool 14 Surface part 20 Electric motor 21 Shaft 30 Oil collecting member 31 Oil reservoir 32 Inner wall 321 Upper end Portion 322 Lower end 323 First deformed portion 324 Corner portion 325 Planar portion 326 Boundary portion 33 Extending portion 331 Upper surface of extending portion 332 Near corner portion 333 Inner edge end portion 334 Step 34 Rising portion 341 Second deformed portion 342 Outer side wall 35 Ventilation opening 40 Electric motor attachment 50 Attachment plate 51 Rectifier plate attachment 100 Oil collecting device D1 Air flow direction TD Rotation direction of filter Ln Vertical distance between upper surface of extended portion and peripheral edge _Wn filter a peripheral edge of the shortest distance w _n filter to the peripheral edge and the inner wall or the first profiled portion The shortest distance to the upstream portion or the second profiled portion Chi

Claims (5)

A disc-shaped filter having holes;
An electric motor for rotating the filter;
An oil collecting member located around the filter,
The number of rotations per unit time of the filter is 230 rpm or more,
The oil collecting member includes an inner wall disposed at a substantially equal distance from a peripheral edge portion of the filter, an extending portion extending inward from a lower end portion of the inner wall, and an inner edge end portion of the extending portion. A riser that rises toward the filter,
The rising portion is disposed at a distance that is different from the outer wall of the rising portion that is disposed at substantially the same distance from the peripheral edge portion of the filter and the distance between the peripheral edge portion of the filter and the outer wall. An oil collecting device having an irregular shape portion.   2. The oil collecting device according to claim 1, wherein the second deformed portion has a curvature smaller than a curvature of the outer wall or a flat surface.   The oil collection according to claim 1 or 2, wherein the shortest distance between the second deformed portion and the peripheral edge of the filter is larger than the shortest distance between the outer wall and the peripheral edge of the filter. apparatus.   When the electric motor rotates the filter, the oil contained in the air collides with the surface portion of the filter and is scattered toward the oil collecting member located around the filter, and the oil collecting member The oil collecting device according to any one of claims 1 to 3, wherein the oil collecting device collects the oil. An oil collecting device according to any one of claims 1 to 4,
A fan that generates air flow,
With
The oil collecting device is a range hood which is located at a communication port communicating with the fan and is provided on the upstream side of the fan on the flow path of the air flow.