JPH11311431A - Fan for range hood fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan for range hood fan, which is improved in the collecting efficiency of grease constituent and very prominent in cleaning property, by a method wherein the whole of a grease filter surface having a wide area is utilized effectively for the adsorbing and removing unit of the grease constituent while the ventilating resistance of the filter is restrained. SOLUTION: Waste gas is passed uniformly through the whole surface of a grease filter, having a wide area on the inner periphery or the outer periphery of a fan 2 and arranged along the fan 2, to maintain a ventilating resistance at a small value. On the other hand, collected grease constituent is blown against the inner surface of a fan casing 1 actively by the high-speed airflow generated by the fan 2 to restrain the ventilating resistance at a small value and increase the collecting efficiency of the grease constituent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for a range hood fan, and more particularly, to a multi-blade fan (centrifugal fan) for efficiently adsorbing and removing (capturing) fats and oils contained in waste gas generated during cooking. The present invention relates to a blower for a range hood fan.

[0002]

2. Description of the Related Art Conventionally, a range hood fan, whether a boot type or a flat type, has a grease filter removably disposed upstream of the fan, and waste gas generated by cooking with the grease filter. Removal of oils and fats contained in water (capture)
It is common to do. This grease filter is
It is an object of the present invention to efficiently remove and collect oil and fat in order to prevent the spread of fire to other parts in the event of a fire, and to minimize the flow of oil and fat to downstream duct pipes and the like. However, it is difficult to say that the conventional grease filter can sufficiently exhibit the performance of capturing fats and oils, and the reality is that the airflow resistance is increased despite the wide filter surface.

[0003] This is because the range hood fan is mounted in a limited narrow space above the cooking utensil and the hood body is surely sucked into the hood body even if the hood body is limited in size by design. As a result, it is necessary to secure a deep pocket space, and as a result, the inside of the hood body has a layout in which the intake port of the blower and the grease filter are close to each other, and secures a large area in the frontage direction of the hood body The portion corresponding to the intake port in the grease filter surface is used locally as an oil / fat adsorption removal unit. Therefore, since the air is ventilated only to the local portion corresponding to the intake port, the airflow resistance increases while having a wide filter surface. Originally, it is an ideal grease filter to uniformly use the entire surface of the grease filter surface having a large area, efficiently capture oil and fat, and suppress the ventilation resistance to a low level.
However, the conventional grease filter is not efficient in capturing oil and fat as described above, and not only the local part but also other parts become dirty, so it is necessary to clean the entire area of the grease filter. There was a problem that the cleaning with water could not be performed easily.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to effectively utilize the entire surface of a grease filter having a large area as a portion for removing oil and fat. Another object of the present invention is to provide a blower for a range hood fan, which has improved air-fat capture efficiency by suppressing the airflow resistance to be low, and has very good cleanability.

[0005]

The technical means taken to solve the above-mentioned object is that the gist of the present invention is that a grease filter is provided around the inner or outer periphery of the fan in the fan casing. I do. Claim 2 is Claim 1
The gist filter described above is provided around the outer periphery of the fan and is of a cut-bend type. A third aspect of the invention is that the grease filter according to the first or second aspect is detachably supported on a bell mouth. The gist of the present invention is that the grease filter according to any one of the first to third aspects is constituted by a plurality of disassembled divided parts that are connected in the length direction. Further, the gist of the present invention is that the oil draining means is provided at the lower end of the fan casing according to any one of the first to fourth aspects.

(Operation) According to the above technical means, the following operation is achieved. (Claim 1) The blower for a range hood fan captures the entire amount of waste gas sucked into the blower by a grease filter disposed along the fan. The grease filter on the inner or outer circumference of the fan arranged along the fan is wider than the area of the air inlet of the blower. In particular, the grease filter provided on the outer periphery has an area slightly larger than that provided on the inner periphery. Therefore, it is possible to uniformly pass the waste gas from the entire surface of the grease filter having a large area, thereby keeping the ventilation resistance small. Then, the captured fats and oils are positively blown off to the inner surface of the fan casing by a high-speed air flow by a fan, thereby preventing clogging and suppressing the airflow resistance to further increase the efficiency of capturing the fats and oils. . (Claim 2) The range hood fan blower can promote and increase the contact and collision of the waste gas by refracting the ventilation path of the waste gas in the traveling direction. The arrangement of a cut-bend type range hood fan on the outer periphery of the fan with the fastest airflow speed among the range hood fans makes the contact and collision of waste gas more effective, and achieves a very high efficiency of capturing oil and fat. To achieve. (Claim 3) In the blower for the range hood fan, the grease filter is simultaneously attached and detached by attaching and detaching the bell mouth. (Claim 4) The blower for a range hood fan is disassembled into a plurality of planar parts to cope with cleaning. (Claim 5) The blower for the range hood fan is separately installed from the oil draining means at the lower end without stagnation of the oil and fat that is efficiently captured, blown off to the inner surface of the fan casing, and accumulated at the lower end of the fan casing. Guide to the oil tank.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the blower for a range hood fan according to the present invention will be described. Reference numeral A denotes the blower for a range hood fan. The blower A for a range hood fan includes a fan casing 1, a fan 2 housed in the fan casing 1, a fan motor 3 transmitting power to the fan 2, a grease filter 4 installed on the outer periphery of the fan 2, and the like. It is configured.

The fan casing 1 includes a left and right opening portions of a body part 1 ′ having a volute shape formed by bending a strip made of a steel sheet, a pre-coated steel sheet of a fluororesin, a pre-coated steel sheet of a silicon resin, or the like. It is closed at 11 and 21, and is formed in the same shape as the conventional one.

The fan casing 1 is shown in FIG.
As shown in FIG. 2, a bell mouth 31 is screwed into an opening 11 a formed in the left side plate portion 11 on the front side, which is one of the two inside surfaces.
It is detachably attached by means such as a stopper to form the intake port 51,
The other right side plate 21 on the rear side is made a blind plate, and the motor mounting portion 13 is further fixed behind it, and the motor mounting portion 13 is fixed.
The fan motor 3 is supported by 13, and a fan (centrifugal fan) 2 disposed inside a drive shaft 3 ′ of the fan motor 3 is attached.

Further, the fan casing 1 has an outlet 61
Multiple hooks 81 on the flange 71 bent from the open edge of
Are scatteredly opened, and the hood body B of the range hood fan
It is configured so that it can be hung so as to be able to hang on and off.

The grease filter 4 is arbitrary, such as a perforated metal or a lath net, which is generally used as this type of grease filter. In the present embodiment, as shown in FIGS. A slit is vertically or horizontally provided at intervals of several millimeters in a metal band plate made of stainless steel, aluminum, or the like having a width dimension substantially equal to the dimension from the inner surface to the opposing right side plate portion (see FIG. 2) 21. This is a cut-bend type filter in which the elongated tongue pieces 14 between the slits are refracted and inclined in an arbitrary direction, and the elongated tongue pieces 14 are provided between the ventilation holes 24. Alternatively, it is formed by being wound in a substantially cylindrical shape, and is detachably supported by the bell mouth 31. In the grease filter 4, the elongated tongue pieces 14 also function as stationary blades.
It is not necessary to be in the same direction as the rotation direction of No. 2, but it may be in the opposite direction or the direction may be changed for each row.

Grease filter 4 for bell mouth 31
The support means is optional, but in the present embodiment, as shown in FIGS. 2 and 4, an annular insertion body 5 having a fitting groove 15 is fixed to the inner surface of the bell mouth 31. One side edge of the grease filter 4 is fitted into the groove 15 to support the grease filter 4 in a removable and cantilever manner. still,
An annular fitting groove 21a is recessed in the right side plate portion 21 of the fan casing 1 corresponding to the other side edge of the grease filter 4, and the other side edge portion of the grease filter 4 is fitted into the annular fitting groove 21a to be stable. (See FIG. 2).

An oil draining means 91 is provided at the lower end of the fan casing 1. This oil draining means 91
Is configured such that the upper end of an oil drain pipe 91b is externally fitted to a mounting cylinder 91a vertically suspended from the inside of the fan casing 1 in a communicating manner.

The blower A for a range hood fan having the above-described configuration according to the present embodiment hooks the hook opening 81 with the hook 6 provided on the top plate b of the hood B as shown in FIG. It is detachably hung and installed in a hanging manner, and is screwed as necessary.

The waste gas rising from the cooking utensil is captured so as to stay in the hood body B, is sucked into the fan casing 1 by the fan A for the range hood fan, and the grease is adsorbed by the grease filter 4. Exhausted outside. At this time, since the grease filter 4 is located on the outer periphery of the fan (centrifugal fan) 2, the waste gas uniformly passes through the entire area of the grease filter 4 by the airflow of the fan (centrifugal fan) 2 to adsorb and remove oils and fats. I do. Moreover,
The characteristic of the cut-bend type grease filter 4 is that the contact and collision of the oils and fats are promoted, so that the performance of capturing the oils and fats is extremely high, and the fan (centrifugal fan) 2
Since it is arranged on the outer periphery of the fan casing 1, a function of preventing clogging that blows oil and fat adsorbed and removed by a high-speed airflow to the inner surface of the fan casing 1 is further provided.
It is possible to maintain the efficiency of capturing oil and fat constantly at high efficiency.

The oils and fats blown off to the inner surface of the fan casing 1 are sequentially discharged from the oil removing means 91 by the hood body B.
The oil is discharged to the oil pack 7 which is hooked on the back plate so as to be detachable, which is suitable for preventing the spread of fire to other parts in the event of a fire.

At the time of cleaning, the blower A for the range hood fan itself is detached from the hood body B, the bell mouth 31 is detached by using a large open space, and the grease filter 4 and the inside of the fan casing 1 are washed together. It is good to go, and Bellmouth in the installed state
After removing the fan 31, the fan (centrifugal fan) 2 may be removed to clean the inside of the fan casing 1.

Next, FIG. 5 shows an example in which the cut-bend type grease filter 4 is composed of a plurality of disassembled divided parts 34 which are connected in the longitudinal direction. In the case of this embodiment, the curved hook portions 44, 44 which form a hooking relationship with the remaining band plate portion adjacent to the remaining band plate portion at the connection side portion (short edge side) of each divided part 34. Curved in the opposite direction, and the adjacent curved hooks 44, 44
They are wound around each other and wound in a cylindrical or almost cylindrical shape. In the case of this embodiment, the divided parts 34
... has the advantage of being able to clean each time.

The present invention also includes a fan for a range hood fan in which a grease filter 4 is provided around the inner periphery of a fan (centrifugal fan) 2. Also in this case, although the filter area is slightly reduced as compared with the case where the grease filter is provided around the outer periphery of the fan, the waste gas can be uniformly passed from the entire surface of the filter to reduce the ventilation resistance.

Further, the present invention is not limited to the illustrated vertical range hood fan blower, but also includes a horizontal (horizontal) range hood fan blower. In the case of this embodiment, although not shown, the lower end of the fan casing is the entire lower side plate portion having the bell mouth, and the danger of oil and fat blown off by the centrifugal fan is transmitted from the body and the like to drop from the intake port. There is. In order to prevent this, an oil drain pit is recessed at an arbitrary position on the lower side plate portion, and a guide groove for guiding the oil drain pit is formed at an edge of the side plate portion. Needless to say, oil drainage means is provided in the above-described oil discharge pit and oil is drained to the oil pack as in the above-described embodiment.

(Effects of the Invention) The present invention has the following advantages because it is configured as described above. (Claim 1) The grease filter provided on the inner circumference or outer circumference of the fan in the blower has a large area larger than the area of the intake port of the blower and is close to the fan, so that a high-speed airflow acts. Therefore, the waste gas is uniformly passed from the entire surface of the grease filter having a large area to suppress the ventilation resistance, and the captured fats and oils are blown to the inner surface of the fan casing by the high-speed airflow of the fan to prevent clogging. From
Oil trapping efficiency can be constantly maintained at a high level. In addition, as in the case of a flat-type range hood fan having a grease filter arranged on the outer periphery of the fan, for example, oil and fat blown out of the grease filter by the air current of the fan extends over a wide area of the entire chamber in which most of the hood body is occupied. By keeping the blower itself removably suspended on the hood body without adhering to the cleaning work, the inner surface of the fan casing, which is the most dirty like the chamber chamber, can be lowered (opened). Space), remove the fan and its motor with the bell mouth,
The advantage of easy cleaning of all corners can be achieved. Moreover,
The grease filter in front of the blower and its mounting member are not required at all, which not only makes it easier to clean the inside of the hood, but also secures a wider space for capturing waste gas and prevents leakage of waste gas into the room. In addition, only the blower is installed in the hood, and the hood can have various morphological variations according to customer needs. Also, this grease filter has a cylindrical shape,
Kitchen sinks and containers such as buckets can be easily cleaned and are convenient. In addition, since the grease filter is provided by utilizing the space in the fan casing, it is not necessary to make a large-scale improvement, it can be dealt with by adding a simple structure, and the provision cost can be reduced. (Claim 2) Since the cut-bend type grease filter is disposed at the outer peripheral position of the fan having the fastest airflow velocity in the range hood fan, contact and collision of waste gas with the cut-and-raised piece (elongated tongue piece). In addition to promoting the increase, the contact and collision of the waste gas with the cut-and-raised piece (elongated tongue piece) by the high-speed air flow is more effectively performed, and in addition, the waste gas is uniformly passed from the entire surface of the grease filter. Since the function of suppressing the ventilation resistance for reducing the ventilation resistance and the function of blowing off the oil and fat for preventing clogging are synergistic, the efficiency of capturing the oil and fat becomes extremely high. (Claim 3) In addition, since the grease filter is supported by the bell mouth, the grease filter can be naturally disposed or removed at a predetermined position by attaching and detaching the bell mouth, and the means for attaching and supporting the grease filter is provided. It is unnecessary and simple in structure, and greatly improves the workability during cleaning and maintenance, and inadvertent contact with the fan due to mounting errors such as when mounting and supporting the grease filter separately from the bell mouth Is also lost. (Claim 4) Also, since the grease filter is composed of a plurality of disassembled divided parts that are connected in the length direction, the plurality of divided parts are developed into a planar shape, and the whole is cornered using a brush or the like. Everything can be easily cleaned. (Claim 5) As described above, the efficiently trapped oils and fats are blown off and adhered to the inner surface of the fan casing to flow down by suppressing the ventilation resistance to a small amount so that a large amount of the oils and fats is accumulated in the fan casing. Since the oil is discharged from the oil removing means as needed, it is necessary to configure a suitable oil and fat removing means for preventing the spread of the oil and fat to downstream duct pipes and the like and preventing the spread of fire to other parts in the event of a fire. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an engagement relationship with a hood body of a blower for a range hood fan according to an embodiment.

FIG. 2 is a cross-sectional view of a blower for a range hood fan, partially cut away.

FIG. 3 is an enlarged cross-sectional view taken along line (3)-(3) of FIG. 2, showing a grease filter portion.

FIG. 4 is an exploded perspective view showing a relationship among a fan casing, a grease filter, and a bell mouth.

FIG. 5 shows another embodiment of a grease filter,
(A) is a perspective view showing a divided part. (B) is a perspective view showing a state in which a cylindrical grease filter is formed by the divided parts.

[Explanation of Signs] A: Blower for range hood fan 1: Fan casing 2: Fan (centrifugal fan) 4: Grease filter 31: Bell mouth 34: Dividing parts 91: Oil removing means B: Hood body

Claims (5)

[Claims] 1. A fan for a range hood fan, wherein a grease filter is provided around an inner or outer periphery of the fan in a fan casing. 2. The blower for a range hood fan according to claim 1, wherein said grease filter is provided around an outer periphery of a fan and is of a cut-bend type. 3. The grease filter according to claim 1, wherein said grease filter is detachably supported by a bell mouth.
The blower for the described range hood fan. 4. A blower for a range hood fan according to claim 1, wherein said grease filter is constituted by a plurality of disassembly-divided parts connected in a length direction thereof. 5. An oil draining means is provided at a lower end portion of said fan casing.
A blower for a range hood fan according to the above item.