JP2000329387A - Hood fan for range - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and collect oil contained in exhaust smoke easily without requiring a grease filter by providing a large number of protrusions and recesses on the inner circumference of a easing and providing an oil pocket for collecting oil flowing down on the inner circumference of the casing. SOLUTION: A casing 2 is placed removably in a hood frame 1. The casing 2 is tubular and placed longitudinally. A large number of protrusions and recesses are provided on the inner circumference of the casing 2 in order to remove oil in exhaust gas. An undercover is fixed removably to the hood frame 1 and a steel arranging plate 13 having oil guide grooves is provided removably on the underside of the undercover. The oil guide grooves are collected at an oil outlet 17 made on the rear side of the arranging plate 13. Furthermore, an oil pocket 18 is provide removably below the oil outlet 17 and made of transparent glass so that the standing state of oil can be confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood fan mounted on a kitchen range.

[0002]

2. Description of the Related Art A range food fan is provided with a grease filter for collecting oil contained in cooking smoke and steam. Cleaning the grease filter is very troublesome because the oil does not easily fall off. Also, replacement of the grease filter is troublesome.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus which can easily separate and collect oil contained in exhaust smoke without providing a grease filter.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a hood frame, a cylindrical casing vertically arranged in the hood frame, a centrifugal fan rotor placed in the casing, and a hood frame. A range hood fan provided with a lower cover, and an undercover having an intake bell mouth opposed to a suction side provided on a lower side of the fan rotor. And an oil pocket for collecting oil flowing down the inner periphery of the casing.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings showing one embodiment of the present invention.

First, FIG. 1 shows basic blocks of a portable terminal.
Is quoted.

The hood frame 1 made of a steel plate has a hollow inside. The casing 2 is detachably provided inside the hood frame 1. The casing 2 is vertically arranged in a cylindrical shape as shown in FIG. A casing exhaust port 3 is provided on the outer periphery of the casing 2, and a circular opening 4 is provided at a lower portion. The casing exhaust port 3 is connected to an exhaust duct 5 provided in the hood frame 1.

[0008] Both the exhaust duct 5 and the casing 2 are formed of a steel plate. An annular flange 6 is provided at a lower portion of the casing 2. The collar portion 6 is formed to extend toward the inner peripheral side of the casing 2 and is inclined so as to descend toward the tip. The angle of inclination is 15 ° to 30 °. The circular opening 4 is formed at the tip of the flange 6. The collar 6 is formed separately from the casing 2 and is detachable.

The inner periphery of the casing 2 is provided with a number of uneven portions 7. Although it is formed with a vertically extending ridge, it may be simply uneven. The uneven portion 7 removes oil in the exhaust gas, and will be described later in detail.

The fan rotor 8 made of a steel plate placed inside the casing 2 is a sirocco fan which is a kind of centrifugal fan. The fan rotor 8 is detachable inside the casing 2.

An under cover 9 made of a steel plate is provided on the lower surface of the hood frame 1. Under cover 9 is hood frame 1
Removably attached to. An intake bell mouth 10 provided on the under cover 9 is for guiding the intake air to the lower end suction side of the fan rotor 8.
Is wrapped inside the lower end suction side of the fan rotor 8.

The oil reservoir groove 11 is formed in an annular shape so as to surround the bell mouth 10 for intake. Oil sump 1
The bottom of 1 is provided with an oil drop hole 12 as shown in FIGS. The oil storage groove 11 is inclined so as to descend toward the oil storage hole 12 so that the oil storage hole 12 is located at the lowest position at the bottom of the oil storage groove 11. For this reason, the oil flowing into the oil sump groove 11 flows down from the oil drop hole 12.

The under cover 9 has an inclined shape so as to be lowered toward the oil drop hole 12 as shown in FIGS. Θ2 shown in FIG. 3 is θ2 shown in FIG.
And is formed so as to be inclined so as to descend from the periphery of the under cover 9 toward the oil drop hole 12. For this reason, the oil adhering to the under cover 9 flows into the oil reservoir groove 11.

The rearranging plate 13 made of a steel plate detachably provided below the undercover 9 is smaller than the undercover,
Moreover, it is arranged slightly away from the under cover 9. A suction gap 14 is formed between the periphery of the current plate 13 and the under cover 9, and a gap channel 15 is provided between the current plate 13 and the under cover 9.

The current plate 13 has a plurality of oil guide grooves 16 as shown in FIG. 4, FIG. 6, and FIG. The oil guide groove 16 is
Both the depth H1 and the width L1 are 3 mm. These oil guide grooves 16 are formed so as to gather at an oil outside outlet 17 formed on the rear side of the current plate 13. The oil outside outlet 17 is located on the wall side of the house where the range hood fan is mounted, and the wall side is the rear side.

The current plate 13 has a shape that is inclined so as to be lowered toward the oil outside outlet 17. Θ3 shown in FIG. 4 corresponds to θ3 shown in FIG.
3 is inclined from the front side and both sides toward the rear center. Therefore, the oil adhering to the current plate 13 flows through the oil guide groove 16 and collectively flows out from the oil outside outlet 17.

The oil pocket 18 is provided at the oil outlet 1
7 is provided detachably below. It is formed of transparent glass so that the state of accumulation of oil can be understood.

The above is an explanation of the embodiment of the present invention mainly from the aspect of configuration. Next, the operation will be described.

The smoke containing oil generated from the range collides with the lower surface of the current plate 13 as an updraft, and flows along the lower surface to the outer peripheral side of the current plate 13, and the suction provided on the peripheral edge of the current plate 13. It is sucked into the gap 14. And the smoke
The air is sucked into the fan rotor 8 from the lower suction side of the fan rotor 8 through the gap flow path 15 and the bell mouth 10 for intake,
It is discharged inside the casing 2. The smoke is exhausted to the outside via the casing exhaust port 3 and the exhaust duct 5 while flowing along the casing 2.

In this way, the smoke generated from the range is exhausted to the outside, and the oil contained in the smoke is separated during the exhaust as follows.

First, when the smoke flows through the gap channel 15, oil is separated from the smoke and adheres to the upper surface of the current plate 13 or the lower surface of the under cover 9. When the smoke flows through the narrow gap flow path 15, the smoke sufficiently touches the upper surface of the current plate 13 or the lower surface of the under cover 9, and it is considered that the oil component is positively separated. Further, since the plurality of oil guide grooves 16 formed in the current plate 13 have irregularities, it is presumed that the separation of the oil is further promoted.

The other is that when the smoke is discharged by the centrifugal force of the fan rotor 8 and the smoke flows along the inner peripheral surface of the casing 2, it collides with a large number of uneven portions 7 formed on the inner periphery of the casing 2. As a result, the oil is well separated from the smoke and adheres to the inner periphery of the casing 2.

The oil adhering to the upper surface of the flow straightening plate 13 flows through the oil guide groove 16 and is collected. The oil falls from the oil outside outlet 17 into the oil pocket 18 and accumulates. The oil adhering to the lower surface of the under cover 9 flows to the lower surface side of the oil sump groove 11, and
Further, they gather toward the oil drop hole 12 and then fall on the upper surface of the current plate 13. After dropping on the current plate 13, the oil flows into the oil guide groove 16 as described above, and
Fall and accumulate.

The oil adhering to the inner periphery of the casing 2 flows to the lower flange portion 6 because the casing 2 is arranged vertically in a tubular shape. Since the collar 6 is inclined so that the tip is lower, the oil that has flowed through the collar 6 falls from the circular opening 4 at the tip to the undercover 9 side. Since the annular oil sump groove 11 is located immediately below the circular opening 4, oil falling on the under cover 9 side is directly transferred to the oil sump groove 11.
to go into. The oil that has fallen into the oil sump 11 is the oil drop hole 1
2 and falls from the oil drop hole 12 to the upper surface of the current plate 13. After dropping on the current plate 13, it flows through the oil guide groove 16 and drops into the oil pocket 18 as described above.

As described above, the oil separated from the smoke and adhering to the upper surface of the current plate 13, the lower surface of the under cover 9, or the inner periphery of the casing 2 accumulates in the oil pocket 18. Remove the accumulated oil from the hood fan for
By reattaching 8, the oil can be continuously stored.

Here, the advantages of the above-described embodiment of the present invention will be described together.

The oil component contained in the smoke is
The grease filter can be omitted because it can be attached to the lower surface of the under cover 9 or the inner periphery of the casing 2 and captured.

The oil trapped by adhering to the upper surface of the current plate 13, the lower surface of the under cover 9, or the inner periphery of the casing 2 flows down naturally and is collected in the oil pocket 18, which is different from that using a grease filter. Less cleaning is required.

A bell mouth 10 for suction is provided on the under cover 9.
Are formed integrally, the configuration is simpler than that formed separately. In particular, since the oil sump groove 11 is provided around the bell mouth 10 for intake, it is particularly difficult to separate the bell mouth 10 for intake because of its complicated structure.

The oil that falls from the circular opening 4 at the tip of the inclined flange 6 falls directly into the oil sump 11, so that the under cover 9 is less contaminated except for the oil sump 11, and the cleaning is accordingly much easier. Easy.

The oil in the oil sump groove 11 is
, And falls to the side of the current plate 13 from the oil drop hole 12 at one location. Therefore, unlike the arrangement in which the oil drop holes 12 are scattered and arranged, the flow straightening plate 13 is less contaminated with oil.

Since the flow regulating plate 13 is formed to be strong by forming a large number of oil guide grooves 16 formed so as to be recessed and a rising wall surrounding the outer periphery, deformation is small even when formed of a thin steel plate. Although the current plate 13 is easily deformed by directly receiving the heat of the range, it is hard to deform such as warpage because it is strong.

[0033]

As described above, the present invention relates to a hood frame, a cylindrical casing vertically arranged on the hood frame, a centrifugal fan rotor placed in the casing, and the hood frame. A range hood fan provided with an undercover having a bell mouth for suction provided on a lower side of the fan rotor and opposed to a suction side provided on a lower side of the fan rotor. And an oil pocket for collecting oil flowing down the inner periphery of the casing.

Thus, the oil contained in the smoke in the exhaust gas can be separated and captured, and the oil can be collected in the oil pocket. Therefore, it is not necessary to provide a grease filter, and the cleaning of the range hood fan is reduced. You just need to do it.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a range hood fan according to an embodiment of the present invention.

FIG. 2 is a single-piece view of a casing according to the embodiment of the present invention.

FIG. 3 is a diagram of a single part of an undercover according to an embodiment of the present invention.

FIG. 4 is a view of a single product of a current plate according to an embodiment of the present invention.

FIG. 5 relates to one embodiment of the present invention,
It is A sectional drawing.

FIG. 6 relates to one embodiment of the present invention,
It is B sectional drawing.

FIG. 7 relates to one embodiment of the present invention, and corresponds to FIG.
It is C sectional drawing.

[Explanation of symbols]

1 hood frame, 2 casing, 8 fan rotor,
10: bell mouth for intake, 9: under cover, 7: uneven part, 18: oil pocket.

Claims (8)

[Claims] 1. A hood frame, a cylindrical casing vertically arranged in the hood frame, a centrifugal fan rotor placed in the casing, and a hood frame provided below the hood frame, and A range hood fan including an undercover having an intake bell mouth opposed to a suction side provided on a lower side of a fan rotor, wherein the casing has a large number of irregularities on an inner periphery thereof, and flows down the inner periphery of the casing. A hood fan for a range, comprising an oil pocket for collecting oil to be removed. 2. A range according to claim 1, wherein an annular flange extending in an inner circumferential direction is provided below the casing, and the flange is inclined so that a tip end side is lower. Food fan. 3. An intake bell mouth for guiding intake air to a lower end suction side of the fan rotor is provided on an under cover, and an annular oil reservoir groove is formed around the intake bell mouth. A hood fan for a range, wherein an oil drop hole for dropping oil is formed at the bottom of the oil sump groove. 4. The oil flow groove according to claim 3, wherein the oil sump groove is inclined over the whole and the oil drop hole is provided in a lower bottom portion, and the intake air flow is provided below an under cover including the oil drop hole. A hood fan for a range, wherein a rectifying plate is provided so as to keep a road separated. 5. The range hood fan according to claim 4, wherein the rectifying plate is arranged to be inclined and an oil guide groove for collecting the oil flowing in the inclined direction is formed in the rectifying plate. . 6. The hood according to claim 5, further comprising a detachable oil pocket for collecting the oil collected by the oil guide groove and falling from the current plate side. fan. 7. The range hood fan according to claim 6, wherein the oil pocket is formed transparent. 8. The range hood fan according to claim 4, wherein the bell mouth for intake is disposed so as to wrap around a suction side of a fan rotor.