JP2005315544A - Range hood fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a range hood fan for trapping and removing oily fats and oils contained in waste gas without dropping them down. <P>SOLUTION: A narrow suction port 6 is formed in a portion near parallel two, three or four edges of a cover plate 4 set deeper for covering a lower opening portion of a hood body 1. The waste gas G flowing from the suction port 6 at an increasing flow speed is sufficiently brought into contact with an annular waste gas colliding means B endlessly and continuously provided right behind the suction port 6. After its direction is changed, the oily components thereof are deposited on the annular waste gas colliding means B with centrifugal action caused by the suction force of an exhaust device 2. The fats and oils deposited on the annular waste gas colliding means B are dropped from a free end 37 crossing the suction port 6 and facing a waste gas impinging face 5 onto the reverse face of the waste gas impinging face 5 and collected by an oil receiving part 18 using the inclination of the waste gas impinging face 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a range hood fan that is installed above a cooking utensil and removes oils and fats contained in waste gas and exhausts it.

Conventionally, there are various types of range hoods, such as flat range hood fans, boot type range hood fans, open kitchen range hood fans, island type range hood fans, etc. It is intended to adsorb and remove the oil and fat.
In the prior art, a cover plate is provided at a position one step deeper from the lower open portion of the hood body, and a narrow suction port is formed near the three or four edges of the cover plate. There is also a range hood fan in which a grease filter is provided (for example, Patent Document 1).

  Examples of the grease filter include a punching metal method, a multilayer lamination method such as a woven fabric and a non-woven fabric, and a slot filter method.

Both of these common problems are aggregates of micropores, and therefore clogging occurs when the oil and fat are hardened due to adhesion of dust and dust or oxidation.
This clogging is different depending on the oil and fat capturing performance of the grease filter, and the oil and fat adhering to clogging that is not regularly managed drops and stains the kitchen.

  By the way, the above-mentioned prior art is provided at a portion near the three edges or four edges of the cover plate while capturing the waste gas rising from the cooking device and diffusing as it rises in the capture space upstream of the cover plate. Suction can be effectively performed from a narrow grease filter in which the suction force is concentrated.

However, the above problem is latent because a grease filter is used.
JP 11-2111174 A

  This invention is made | formed in view of the said conventional situation, The objective process is providing the range hood fan which captures and removes the fats and oils contained in waste gas, without dripping down.

As a result of intensive research when removing the oil and fat contained in the waste gas without using a grease filter, the present inventors have been provided to secure a waste gas capture space in the lower open portion of the hood body. With the narrow suction port provided at the edge of the waste gas abutting surface against which the rising waste gas strikes, and the annular waste gas collision means and recovery means provided immediately after that, without dripping oil and fat The present inventors have found that a capturing effect can be achieved and have arrived at the present invention.
That is, according to the present invention, the lower open portion of the hood body is covered with a cover plate that is recessed one step further to secure a waste gas capturing space in the lower open portion of the hood body, and an exhaust device is provided on the downstream side of the cover plate. In a range hood fan, a narrow suction port is formed on the two or three or four edges of the cover plate in parallel, and the rising waste gas abuts on the cover plate and changes the direction of suction. A waste gas abutting surface to be sucked into the mouth is formed, and a waste gas collision plate is provided immediately after the suction port to collide waste gas and change the direction of the flow, and each waste gas collision plate is continuously connected in an endless manner. The waste gas collision means comprises a waste gas that flows in from the suction port at a high flow velocity and collides with the annular waste gas collision means to cause oil and fat to adhere to the annular waste gas collision means, and the annular waste gas collision means The recovery means for recovering the attached oil and fat is connected to the A range hood fan, characterized in that it is (claim 1).
Also, a range hood fan in which the lower open portion of the hood body is covered with a cover plate that is recessed one step further to secure a waste gas capturing space in the lower open portion of the hood body, and an exhaust device is provided on the downstream side of the cover plate. And forming a waste gas abutting surface by separating the cover plate from an edge or a portion close to the edge, and a narrow width between the two parallel or three edges or four edges of the waste gas abutting surface and the cover plate. A waste gas collision plate that secures the suction port and collides the waste gas immediately after the suction port and changes the direction of the flow is provided, and each waste gas collision plate is connected endlessly to provide an annular waste gas collision means. The waste gas flowing in from the suction port at a high flow velocity is caused to collide with the annular waste gas collision means, and the oil and fat is attached to the annular waste gas collision means, and the oil and fat attached to the annular waste gas collision means The collection means for collecting the minute is communicated Those may be a range hood fan (Claim 2).
The first aspect of the present invention is a range hood fan in which a suction port is opened at a waste gas abutting surface against which a rising waste gas abuts. The second aspect of the present invention is a range hood fan in which a waste gas abutting surface against which rising exhaust gas abuts is separated from a cover plate and a narrow suction port is secured between the waste gas abutting surface and the cover plate. .
The annular gas collision means is preferably a press-molded product obtained by integrally molding a plurality of waste gas collision plates.

According to the above means, the waste gas generated from the cooking device rises and hits the bottom part (waste gas hitting surface) of the cover plate, and the direction is changed at the waste gas hitting surface, from a plurality of narrow suction ports. Aspirated at a higher flow rate. The waste gas is brought into contact with an annular waste gas collision means connected in an endless manner immediately after the suction port, and the direction of the waste gas is changed, and the fat and oil contained in the centrifugal action by the suction force of the exhaust device is supplied to the annular waste gas collision means. The oil / fat content adhered to the annular waste gas collision means is recovered by the recovery means.
Further, the waste gas collision plates are connected in a ring shape so that the long side end portion does not become a free end, and leakage of waste gas from the long side free end of the waste gas collision plate is prevented. Improve oil and fat capture efficiency by making sufficient contact with the plate.

Each waste gas collision plate has a free end that rises from a waste gas abutting surface portion outside the corresponding suction port and has a free end that faces the back surface of the waste gas abutting surface across just behind the suction port. The recovery means includes an inclined portion provided on the waste gas abutting surface and an oil receiving portion provided on the inclined lower end of the inclined portion, and falls from the free end to the waste gas abutting surface back surface. The oil and fat components to be guided are guided to the oil receiving portion (Claim 3), and each of the waste gas impingement plates rises from the cover plate and crosses just behind the suction port to face the waste gas butting surface. A waste gas collision surface having a free end, and the recovery means includes an inclined portion provided on the waste gas abutting surface, and an oil receiving portion provided at an inclined lower end of the inclined portion, from the free end Oil and fat that falls on the back of the exhaust gas When to guide the oil receiving portion is suitable (claim 4).
Here, the inclined portion may be configured with an inclined waste gas abutting surface, or may be configured by forming an inclined oil guide line on the back surface of the waste gas abutting surface. Is.

According to the above means, the oil and fat adhering to the waste gas collision plate is dropped from the free end to the back surface portion of the waste gas abutting surface, and promptly guided to the oil receiving portion at the lower end by the inclined portion.
The waste gas is sucked into the exhaust device through a gap between the free end and the back surface of the waste gas abutting surface.

  And, the free end is optimal when it is formed with an edge that is bent in the direction of the backside of the waste gas butting surface that is inclined toward the backside of the waste gas butting surface ( Claim 5).

  According to the above means, the waste gas impinging surface that is inclined toward the back side of the waste gas impinging surface promotes the falling of the oil and fat adhering by the guiding action of the waste gas impinging surface, and the direction of the back side of the waste gas contacting surface that is continuous with the waste gas impinging surface The direction-changing action of the bent free end (edge) increases the oil capture efficiency.

Then, the waste gas abutting surface is separated from the cover plate, and the waste gas abutting surface is made detachable from the cover plate (Claim 6), or the annular waste gas impinging means is made detachable from the waste gas abutting surface. (Claim 7) and are suitable for cleaning.
In addition, the waste gas abutting surface can be attached to and detached from the annular waste gas collision means (Claim 8), or the annular waste gas collision means can be attached to and detached from the cover plate (Claim 9). is there.

If a grease filter is provided in the space surrounded by the free ends of the respective waste gas collision surfaces of the annular waste gas collision means, or is provided separately or separately from the annular waste gas collision means, it becomes more optimal ( Claim 10).

According to the above means, when the waste gas from which the fats and oils have been removed on the respective waste gas collision surfaces of the annular waste gas collision means passes through the downstream grease filter, the remaining fats and oils are further adsorbed and removed.
Each of the waste gas collision plates includes a waste gas collision surface that traverses just behind the suction port and is inclined toward the rear surface of the waste gas abutting surface and has an inclined end facing the rear surface of the waste gas abutting surface, The recovery means comprises an inclined portion provided on the waste gas abutting surface and an oil receiving portion provided at the inclined lower end of the inclined portion, and falls from the end of the waste gas abutting surface to the rear surface of the waste gas abutting surface. The oil and fat content to be guided may be guided to the oil receiving portion (claim 11).

Since the present invention is configured as described above, it has the following advantages.
(Claim 1) Waste gas sucked in from the suction space at an increased flow velocity comes into contact with the waste gas impingement plate immediately after it, changes its direction, and wastes oil and fat contained in the centrifugal action by the suction force of the exhaust means. Since it is a range hood fan that adheres to the gas collision plate and collects the adhered oil and fat by the collecting means, dripping of the oil and fat due to clogging of the grease filter can be prevented as in the conventional range hood fan.
In addition, the waste gas collision plate is arranged in a ring shape so that the end on the long side does not exist as a free end, so that leakage of waste gas from the free end of each waste gas collision plate is prevented. The oil and fat capture efficiency can be improved by sufficiently contacting the waste gas collision plate.
Further, when the annular waste gas collision means is a press-molded product obtained by integrally molding a plurality of waste gas collision plates, it is not necessary to separately connect the waste gas collision plates with connection means such as welding, and molding is easy. , Can contribute to the low price.
In addition, the narrow suction port (hole) only enters the field of view, and it is possible not only to prevent deterioration of the design due to the exposure of the grease filter, but also to use a decorative board or the like that closes the grease filter invisible from the front. It can be provided at a low price.
In addition, by appropriately coloring each waste gas impingement plate as desired, the coloring can enter the field of view during cooking, and the design can be improved.

(Claims 3, 4, 11)
In addition, the oil and fat trapped on each waste gas collision plate is guided from each waste gas collision surface to the oil receiving part using the waste gas abutting surface that the collision plate faces. Without it, collection is speedy.
In claim 11, the waste gas abutting surface is inclined toward the back side of the waste gas abutting surface, so that the adhered oil and fat is quickly guided from the waste gas collision surface to the waste gas abutting surface, contributing to the improvement of the recovery efficiency. it can.

(Claim 5)
In addition, the flow of adhering oil and fat is promoted by riding on the slope toward the back side of the waste gas impingement surface of the waste gas impingement plate. Capturing efficiency and recovery efficiency of fats and oils can be enhanced by further direction changing action and oil fall promoting action by the bent edge.

(Claims 6-9)
Further, the waste gas abutting surface and the annular waste gas collision means are detachable. Therefore, it is easy to clean the waste gas abutment surface and the annular waste gas impingement means that are mainly attached with oil and fat. It can be done.

(Claim 10)
In addition, since the grease filter is provided integrally or separately in the space surrounded by the free end of each waste gas collision surface of the annular waste gas collision means, the oil and fat that could not be captured by the annular waste gas collision means The oil is absorbed and removed by the grease filter and the oil and fat contained in the waste gas is recaptured, so that the oil and fat capture efficiency is further improved.
Of course, when the grease filter is formed integrally with the annular waste gas collision means, it is easy to form and contributes to low cost, and can be cleaned at the same time with the annular waste gas collision means, and can be easily installed. In the case of a separate body (detachable) with respect to the collision means, it can be removed and cleaned.
Even if the oil and fat adsorbed and removed by the grease filter is dripped, it can be dripped onto the waste gas abutting surface and guided to the oil receiving portion provided at the inclined lower end, so that there is a concern of dripping into the room. Not at all.

  Next, an embodiment of the range hood fan of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show the first embodiment, and FIGS. 5 and 6 show the second embodiment. ing. First, the first embodiment will be described.

  As shown in FIG. 1, the range hood fan A has an exhaust device 2 installed on a top plate portion 11 of a flat and thin box-shaped hood body 1 having an open lower surface, and the exhaust device 2 is erected from the front. 3, the lower open portion is covered with a concave cover plate 4 having a bottom portion that is one step deeper, and the lower portion of the cover plate 4 is used as a capture space S for waste gas G generated from the cooking device.

  In addition, the range hood fan A hooks the rear edge of the cover plate 4 to the lower end of the back plate portion 21 of the hood body 1 so as to be rotatable, and narrows the cover plate 4 toward two parallel edges, three edges, or four edges. A suction port 6 is opened, and a rising waste gas G hits the cover plate 4 to form a waste gas abutting surface 5 that changes the direction and sucks the suction port 6 and opens the suction port 6. The lower end opening portion of the intake chamber 31 which is provided in the hood body 1 and is expanded downward is exposed to the waste gas abutting surface 5, and the upper end opening portion of the chamber 31 is communicated with the exhaust device 2.

The suction port 6 has a long hole shape, and is formed with a substantially equal length along each edge of the waste gas abutting surface 5 as shown in FIG.
A plurality of the suction ports 6 may be formed on the straight line along each edge of the waste gas abutting surface 5 at intervals.

Further, the range hood fan A is provided with each waste gas collision plate 7 immediately after each suction port 6 as shown in FIG. 1 and the like, and the waste gas abutting surface 5 itself is inclined rearward to direct the oil and fat. The recovery means 8 is composed of an inclined portion (not shown) for guiding the oil gas and an oil receiving portion 18 disposed at the lower end of the inclined surface of the waste gas abutting surface 5.
As shown in FIG. 2, the oil receiving portion 18 is supported by a sliding means C such as a guide rail on the bottom portion of the cover plate 4 that does not face the intake chamber 31.

As shown in the drawing, the waste gas abutting surface 5 has a flat saucer shape, is separated from the cover plate 4, and has a flange 16 projecting upward from the edge of the suction port 6.
Further, the waste gas abutting surface 5 has an oil drop opening 15 facing the oil receiving portion 18 at the lower end of the slope.

As shown in FIGS. 3 and 4, each of the waste gas collision plates 7 has a waste gas collision surface 27 that continues to a rising portion 17 that rises from a portion of the waste gas abutting surface 5 outside each suction port 6. The right end 37 is inclined toward the back side of the waste gas abutting surface 5 and the inclined free end 37 is formed by an edge bent toward the back side of the waste gas abutting surface 5. It faces the waste gas butting surface 5 back.
Each of the waste gas collision plates 7 constitutes an annular waste gas collision means B by connecting end portions of the long side of the waste gas collision plate 7 adjacent to the long side end portions in an endless manner.

Accordingly, when the rising waste gas G hits the waste gas abutting surface 5, the direction is changed, the flow velocity is increased, the flow rate is increased, and the waste gas G flows into each suction port 6 and collides with the waste gas collision surface 27. For this reason, the waste gas collision plate 7 is sufficiently in contact with the waste gas collision surface 27 without being leaked from the free end as in the case where the waste gas collision plate 7 is formed at the end on the long side with a free end, and the direction is changed. The oil / fat content contained by the centrifugal separation action by the suction force of the exhaust device 2 is adhered, and the adhering oil / fat content is guided to the waste gas impinging surface 27 inclined toward the back surface of the waste gas abutting surface 5. The waste gas abutting surface is guided and removed from the free end 37, which is continuously (not abruptly) bent in the direction toward the rear surface of the waste gas abutting surface 5. 5 is dropped on the back of the oil and the oil and fat is dropped into the oil drop port. 5 to lead, and discharged to the oil receiving portion 18, is recovered.
The waste gas G is sucked and exhausted to the exhaust device 2 through a gap between the free end 37 and the waste gas abutting surface 5.

The waste gas abutment surface 5 and the annular waste gas collision means B are detachable as shown in FIG.
The attachment means 9 opens a screw hole 19b at the front and rear portions of the horizontal portion 19a of the attachment strip 19 erected in an inverted L shape from the open left and right edges of the cover plate 4, and corresponds to the horizontal piece 19a. A through hole 29 is formed in each of the front and rear locations of both ends of the waste gas abutting surface 5 and the front and rear locations of the base portion 17 of the rising portion 17 of the annular waste gas impinging means B, and the through holes 29 are inserted from below. The screw 100 is screwed into the screw hole 19b. By removing the set screw 100 from the screw hole 19b, the waste gas abutting surface 5 is detached from the cover plate 4, and the waste gas abutting surface 5 is removed. It can be removed from the annular waste gas collision means B.

  Further, a grease filter F is provided in a space surrounded by the free end 37 of each waste gas collision surface 27 of the annular waste gas collision means B, either integrally or separately from the annular waste gas collision means B.

As shown in FIG. 3, the grease filter F is a cut-bend type filter that is bent obliquely between slits that are cut at equal intervals and used as a surface for capturing oil and fat. In the case of a separate structure, such as a grease filter, and a separate body, an engagement / disengagement portion (not shown) with the free end 37 of the annular waste gas collision means B is formed at the grease filter edge. The annular waste gas collision means B is removable.
Reference sign L is illumination.

In the range hood fan A configured as described above, after the fats and oils are adhered and removed on each waste gas collision surface 27 of the annular waste gas collision means B, the grease and fats are further adsorbed and removed by the grease filter F. The air is exhausted outdoors by the exhaust capacity of the exhaust device 2.
Even when the oil and fat is dropped from the grease filter F, the oil is dropped on the rear surface of the waste gas abutting surface 5 in the same manner as the oil and fat adhered and removed to each waste gas collision surface 27 of the annular waste gas collision means B. 18 leads to.
Further, by removing the oil receiving portion 18 and rotating the cover plate 4 downward to remove the waste gas abutting surface 5 and the annular waste gas collision means B, the attached oil and fat can be washed with water.
Of course, the waste gas abutting surface 5 and the annular waste gas collision means B can be removed without changing the cover plate 4.

  Next, the second embodiment shown in FIG. 5 and FIG. 6 will be described. In this embodiment, the cover plate 4 is separated from the edge or the portion near the edge to form the waste gas abutting surface 5, and A narrow suction port 6 is secured between two parallel edges or three edges or four edges of the waste gas abutting surface 5 and the bottom of the cover plate 4, and the annular waste gas impinging means B is disposed just behind the suction port 6. This is a range hood fan A ′.

  As shown in FIG. 6, the annular waste gas collision means B is formed in screw holes 19 b opened in front and rear portions of the horizontal portion 19 a of the mounting strip 19 erected in an inverted L shape from the open left and right edges of the cover plate 4. A setscrew 100 that is inserted through a through hole 29 that is opened at the base end of the rising portion 17 is screwed and can be removed in the same manner as in the first embodiment.

  The waste gas abutting surface 5 separated from the cover plate 4 is screwed from the front and rear positions of the waste gas collision plate 7 constituting the grease filter F or the annular waste gas collision means B as shown in FIG. The support leg 10 having the groove 10a opened is suspended, and the set screw 100 inserted through the mounting hole 25 provided in the waste gas abutting surface 5 is screwed into the screw groove 10a to be removed from the annular waste gas collision means B. It is possible.

Each waste gas collision surface 27 of the annular waste gas collision means B is inclined toward the back side of the waste gas abutting surface 5 across the suction port 6 continuous with the rising portion 17 rising from the cover plate 4. The inclined free end 37 is formed by an edge bent toward the rear surface of the waste gas abutting surface 5 and faces the rear surface of the waste gas abutting surface 5 as in the first embodiment. It is.
Other configurations, operations, and the like are the same as those in the first embodiment described above, and a specific description thereof will be omitted.

  It goes without saying that the present invention is also directed to a range hood fan that opens a space surrounded by the free end 37.

The present invention also includes a range hood fan having no intake chamber. In this case, the substantially entire bottom of the cover plate is defined as a waste gas abutting surface, and the suction port is opened close to a parallel edge, three edges, or four edges on the waste gas abutting surface, and the exhaust port is opened from the suction port. It is preferable to suck the waste gas with the intake capacity.
Furthermore, the present invention is provided with a waste gas collision plate that traverses just behind each suction port on the hood body side, the waste gas collision plate has an inclined waste gas collision surface that inclines toward the rear surface of the waste gas, It also includes a range hood fan having a configuration in which the lower end of the slope faces the waste gas and faces the rear surface.

It is partially cut away in the side sectional view of the first embodiment. Bottom view. The partial expanded sectional view of the principal part. The (4)-(4) line expanded sectional view of FIG. It is side surface sectional drawing of 2nd Embodiment, and shows only the principal part. FIG. 6 is an enlarged cross-sectional view taken along line (6)-(6) in FIG.

Explanation of symbols

A, A ′: Range hood fan 4: Cover plate S: Capture space 2: Exhaust device 6: Suction port 5: Waste gas abutting surface 7: Waste gas collision plate B: Annular waste gas collision means 18: Oil receiving portion 27: Waste gas collision surface F: Grease filter G: Waste gas 37: Free end (edge) 17: Start-up part 8: Recovery means 1: Hood body

Claims (11)

  In the range hood fan in which the lower open portion of the hood body is covered with a cover plate that is recessed one step further to secure a waste gas capture space in the lower open portion of the hood body, and an exhaust device is provided on the downstream side of the cover plate. Waste gas that forms a narrow suction port on the two parallel edges of the cover plate or near the three or four edges and causes the rising waste gas to abut on the cover plate and change the direction of suction to suck the suction port. The end face is constructed, and a waste gas impingement plate that collides waste gas immediately after the suction port and changes the direction of the flow is provided, and each waste gas impingement plate is connected endlessly to form an annular waste gas impingement means The waste gas that flows in from the suction port is made to collide with the annular waste gas collision means to cause the oil and fat to adhere to the annular waste gas collision means, and the oil and fat content that adheres to the annular waste gas collision means. That you have contacted the recovery means to recover Range hood fan to butterflies.   In the range hood fan in which the lower open portion of the hood body is covered with a cover plate that is recessed one step further to secure a waste gas capture space in the lower open portion of the hood body, and an exhaust device is provided on the downstream side of the cover plate. The cover plate is separated from an edge or a portion close to the edge to form a waste gas abutting surface, and a narrow suction port between two parallel or three edges or four edges of the waste gas abutment surface and the cover plate A waste gas collision plate is provided immediately after the suction port to collide waste gas and change the direction of the flow, and each waste gas collision plate is connected endlessly to constitute an annular waste gas collision means. The waste gas flowing in from the suction port is made to collide with the annular waste gas collision means to attach the oil and fat to the annular waste gas collision means, and the oil and fat attached to the annular waste gas collision means The collection means to collect is communicated. Nji hood fan.   Each waste gas collision plate has a waste gas collision surface having a free end that rises from a waste gas abutting surface portion outside a corresponding suction port and traverses just behind the suction port and faces the waste gas abutting surface. And the recovery means includes an inclined portion provided on the waste gas abutting surface and an oil receiving portion provided at an inclined lower end of the inclined portion, and the oil and fat that falls from the free end to the waste gas abutting surface rear surface The range hood fan according to claim 1, wherein the minute portion is guided to an oil receiving portion.   Each of the waste gas collision plates includes a waste gas collision surface having a free end that rises from a cover plate and crosses just behind the suction port and faces the rear surface of the waste gas abutment surface, and the recovery means Comprising an inclined portion provided on the surface and an oil receiving portion provided at an inclined lower end of the inclined portion, and guiding oil and fat falling from the free end to the waste gas abutting to the back surface of the oil to the oil receiving portion. The range hood fan according to claim 2, characterized in that:   5. The free end is formed by an edge formed by bending the waste gas collision surface inclined toward the back side of the waste gas butting surface toward the back side of the waste gas. The described range hood fan.   The range hood fan according to claim 3, wherein the waste gas butting surface is separated from the cover plate, and the waste gas butting surface is detachable from the cover plate.   The range hood fan according to claim 6, wherein the annular waste gas collision means is detachably attached to a waste gas abutting surface.   The range hood fan according to claim 4, wherein the waste gas abutting surface is detachable from the annular waste gas collision means.   9. The range hood fan according to claim 8, wherein the annular waste gas collision means is detachable from a cover plate.   6. A grease filter is provided in a space surrounded by a free end of each waste gas collision surface of the annular waste gas collision means, and a grease filter is provided integrally or separately with the annular waste gas collision means. Item 10. A range hood fan according to item 7 or claim 9.   Each of the waste gas collision plates includes a waste gas collision surface that traverses just behind the suction port and inclines toward the back surface of the waste gas, and has an inclined end facing the back surface of the waste gas. And an oil / fat component that includes an inclined portion provided at the waste gas abutting surface and an oil receiving portion provided at an inclined lower end of the inclined portion, and that falls from the end of the waste gas abutting surface to the rear surface of the waste gas abutting surface The range hood fan according to claim 1, wherein the oil hood is guided to an oil receiving portion.

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