JPH06126118A - Grease filter for ventilating apparatus - Google Patents

Abstract

PURPOSE:To provide a grease filter for ventilating apparatus being sanitary and with a long life. CONSTITUTION:A grease filter 20 consists of non woven fabric made of a metal fiber such as aluminum and is provided with a filter main body 26 bent into a wave-like shape, a filter supporting material 27a fixed on the filter main body 26 so as to keep the wave-like shape of this filter main body 26 and a frame fixed on the surrounding of the filter main body 26. In this constitution, the vol. or the filter main body 26 is increased to improve oil and fat accumulating ability. The oil and fat content flows on the surface of the filter main body 26 and is surely guided in the channels of the frame 21 and does not fall down to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device used in a kitchen or the like, and more particularly to a grease filter attached to an intake port of the ventilation device.

[0002]

2. Description of the Related Art FIG. 6 shows a typical ventilation device 1 used in a kitchen. The kitchen ventilation device 1 is installed above a heat device such as a gas range, and drives the fan 2 to forcibly suck in high-temperature air around the intake port 3 and discharge it through the duct 4 to the outside. It is like this.

Since the air sucked by the ventilation device 1 contains a large amount of oil and fat, the intake port 3 of the ventilation device 1 has
A grease filter 5 for removing oil and fat is attached. There are various types of the grease filter 5, but the shape, size, and material of the grease filter 5 are standardized by the Fire Service Agency, the Japan Kitchen Equipment Manufacturers Association, and the like from the viewpoint of disaster prevention.

FIG. 7 shows one of the conventional grease filters 5. The grease filter 5 is composed of a frame 6 made of a stainless steel material having a U-shaped cross section, and a filter body 7 made of a flat plate-shaped aluminum nonwoven fabric arranged in the frame 6. The filter body 7 made of an aluminum non-woven fabric has an advantage that the oil / fat removal rate is good because the mesh is very fine with 100 microns. Further, when an aluminum non-woven fabric is used, air can be sucked into almost the entire surface of the filter body 7, so that there is an advantage that the intake efficiency is good and the load on the fan 2 is small. Therefore, the grease filter 5 using such an aluminum nonwoven fabric tends to be widely used in recent years.

[0005]

Although the conventional grease filter 5 shown in FIG. 7 has the advantages described above, there are some technical problems to be solved.

The oil and fat trapped by the grease filter 5 gradually flows down on the surface or inside of the filter body 7 due to its own weight, and is discharged from the small hole 8 formed in the lower frame 6a to the bottom portion 1a of the ventilation device 1. To be done. Then, the oil and fat components discharged to the bottom surface portion 1a are collected in the waste oil container 10 via the oil discharge pipe 9. However, in the conventional grease filter 5, since the filter body 7 is attached while being pressed against the front portion of the frame 6 by the pressing member 11, the oil and fat flowing down along the front surface of the filter body 7 will enter the small holes 8. Instead, there is a problem that the air flows on the front surface of the lower frame 6a and falls from the ventilation device 1 to the outside.

[0007] Further, the aluminum non-woven fabric has a problem that it is difficult to attach it to the frame 6 because the ultra-fine aluminum fibers are easily frayed in the state as it is and have no regularity. So, in the past,
The surface of the aluminum non-woven fabric is processed into ceramic to form a flat plate with a certain hardness to prevent the fibers from fraying and facilitate the handling. However, when the ceramic processing is applied, the mesh of the filter surface becomes narrow, and the oil and fat does not penetrate into the inside of the filter and accumulates on the surface, causing clogging in a short period of time. When the filter body 7 is clogged, the ventilation effect is reduced and the environment inside the kitchen is deteriorated. Therefore, it is necessary to replace the entire grease filter 5, but frequent replacement of the grease filter 5 is economical. It also gives a disadvantage.

The present invention has been made in view of such circumstances, and an object thereof is to provide a hygienic grease filter having a long life.

[0009]

In order to achieve the above object, a grease filter for a ventilation device according to a first aspect of the present invention comprises a non-woven fabric of metal fibers and is bent into a corrugated shape. And a filter support member attached to the filter body so as to maintain the corrugated shape of the filter body, and a frame attached around the filter body.

[0010]

The grease filter according to the present invention uses a filter body made of a non-woven fabric of metal fibers, preferably an aluminum non-woven fabric, as in the conventional case. Compared with the above, the oil and fat capturing ability is improved. Further, when the filter body is corrugated, most of the front surface thereof is separated from the frame, so that the oil and fat that propagates on the front surface of the filter body is guided into the groove of the frame, and there is no risk of dripping outside.

Further, it is preferable that a wire mesh member such as an expanded metal bent into a corrugated shape is used as the filter supporting member and is arranged on both sides of the filter body so as to sandwich the filter body. When the wire mesh member is used, even if the nonwoven fabric is used as it is in the filter body, the fraying of the metal fibers can be prevented, and the shape of the filter body can be maintained in a corrugated shape. Therefore, the filter body can be easily attached to the frame. Note that the reduction of the opening area due to the wire mesh member is negligible, and does not reduce the intake efficiency.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. The grease filter 20 according to the illustrated embodiment can be used by being attached to the intake port 3 of the conventional general kitchen ventilation device 1 described above with reference to FIG. The grease filter 20 includes a frame 21 made of a stainless steel material having a U-shaped cross section, and a filter assembly 22 arranged inside the frame 21.

The frame 21 is substantially the same as the conventional structure, and is composed of left and right side frames 21a and 21b, and upper and lower frames 21c and 21d detachably attached to the upper and lower ends thereof with screws 23. It has a rectangular shape. A plurality of small holes 24 for discharging the oil and fat captured by the filter assembly 22 are formed at appropriate intervals on the bottom surface portion and the front side of the groove of the lower frame 21d. A handle 25 is provided on the front surface of each of the side frames 21a and 21b to facilitate the attachment of the ventilation device 1 to the intake port 3.

On the other hand, the filter assembly 22 uses a filter body 26 made of an aluminum non-woven fabric having eyes of about 100 microns. The filter body 26 is bent into a corrugated shape, as clearly shown in FIG. The front and rear surfaces of the filter body 26 are made of stainless steel wire mesh filter support material 27.
a and 27b are arranged to sandwich the filter body 26. Since the filter support members 27a and 27b are also bent in a corrugated shape, the filter body 26 can maintain a constant corrugated shape without being subjected to processing such as ceramic processing, and also, the fraying of aluminum fibers is prevented. .

Expanded metal is preferably used as the filter support members 27a and 27b. The expanded metal is a wire mesh member formed by forming a large number of cuts in an alternating arrangement on a thin plate and then expanding the thin plate in a direction orthogonal to the cuts. This expanded metal has the advantage that it does not break when bent into a corrugated shape.
A folding net formed by intersecting thin wire rods can also be used as the filter support members 27a and 27b.
There is a drawback that the wire is easily cut when it is processed into a corrugated shape.

The filter assembly 22 thus constructed has a corrugated shape as a whole, and its maximum thickness is substantially the same as the width of the groove of the frame 21. Therefore, in the groove of the frame 21, the filter assembly 22
Simply insert and the installation will be completed. The folding line of the filter assembly 22 is arranged in the vertical direction, that is, parallel to the side frames 21a and 21b.

The grease filter 20 is installed in the ventilation device 1
When it is attached to the intake port 3 and started to be used, ambient air is sucked through the entire opening inside the frame 21 and the oil and fat in the air is captured by the filter body 26 as in the conventional case. As the filter body 26, an aluminum non-woven fabric that has not been subjected to any treatment such as surface treatment is used as it is.
Is gradually accumulated from inside. Also, the filter body 2
Since 6 has a corrugated shape, its volume is significantly increased as compared with the conventional flat plate-shaped filter body 7 (FIG. 7).
Therefore, the amount of oil and fat that can be accumulated in the filter body 26 is increased by the increase in volume as compared with the conventional case. As described above, since the oil / fat accumulation capacity of the filter body 26 is significantly improved, the life of the filter body 26 is extended and the frequency of replacement of the grease filter 20 or the filter body 26 is reduced.

It should be noted that when the filter body 26 is densely bent, its thickness is substantially increased and the intake efficiency is reduced. When the width of the groove of the frame 21 is 23 mm, the dimension and shape shown in FIG. 4 is the most effective, and the life is extended by about 1.5 times compared with the grease filter 5 shown in FIG. Has been confirmed from the experimental results.

Further, when the filter body 26 has a corrugated shape, since the filter support members 27a and 27b are present, the filter body 26 is attached in a state of being separated from the inner surface of the frame 21. Therefore, all the oil and fat flowing down along the surface of the filter body 26 is guided into the groove of the lower frame 21d and discharged from the small holes 24 to the bottom surface portion 1a of the ventilation device 1. Therefore, in the past, a part of the oil and fat may fall along the outside of the lower frame,
When the grease filter 20 of the present invention is used, such a drop of oil and fat is almost completely prevented.

Although an aluminum nonwoven fabric is used as the filter body 26 in the above embodiment, the present invention is not limited to this, and other metal fiber nonwoven fabrics can be used. Similarly, the frame 21 and the filter support 2
The material of 7a and 27b is not limited to stainless steel. However, since the location where the grease filter 20 is used is a high temperature environment above a gas range or the like, it is necessary that the material used is at least nonflammable and heat resistant.

When the filter body 26 is made of an aluminum non-woven fabric with a ceramic processed surface, or when there is no concern about the shape of the fiber or the fibers fraying, a wire mesh member such as expanded metal is used as the filter support material. The filter main body 26 may be supported by a plurality of support rods 28 mounted between the upper and lower frames 21c and 21d, as shown in FIG.

[0022]

As described above, in the grease filter according to the present invention, the amount of oil and fat that can be accumulated in the filter body is greatly increased, so that the one-time use period is extended.
Therefore, the ventilation efficiency is kept high for a long time, and the environment in the kitchen is kept in a good state. Further, since the number of times of replacing the grease filter is reduced as compared with the conventional case, the labor and cost required for replacement are reduced. In addition, the improved filter capacity saves power to drive the fan,
Cleaning inside the duct is also simplified.

Furthermore, since the oil and fat that is captured by the filter body and flows downward is reliably guided into the frame and discharged to the outside, the oil and fat does not drop into the dish being cooked and is hygienic. .

Further, by sandwiching the filter main body with the wire mesh member, it is not necessary to carry out the surface treatment of the metallic non-woven fabric, which is a constituent element of the filter main body, and the original performance of the metallic non-woven fabric can be sufficiently brought out.

As described above, the present invention has many effects.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of a grease filter for a ventilation device according to the present invention.

FIG. 2 is a front view of the grease filter of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

4 is a cross-sectional view taken along the line BB of FIG.

FIG. 5 is a sectional view similar to FIG. 4, showing another embodiment of the present invention.

FIG. 6 is a perspective view showing a typical ventilation device.

FIG. 7 is a perspective view showing a conventional general grease filter.

[Explanation of symbols]

1 ... Ventilator, 3 ... Intake port, 20 ... Grease filter,
21 ... Frame, 22 ... Filter assembly, 23 ...
Screw, 24 ... Small hole, 25 ... Handle, 26 ... Filter body, 27a, 27b ... Filter support material, 28 ... Support rod.

Claims (4)

[Claims] 1. A filter body made of a non-woven fabric of metal fibers, which is bent into a corrugated shape, a filter support member attached to the filter body so as to maintain the corrugated shape of the filter body, and a filter body of the filter body. A grease filter for a ventilation system that has a frame attached to the periphery. 2. The grease filter for a ventilator, wherein the non-woven fabric of metal fibers is an aluminum non-woven fabric. 3. The filter supporting material is a wire mesh member bent into a corrugated shape, and is arranged on both sides of the filter body so as to sandwich the filter body. A grease filter for the described ventilation system. 4. The filter support material is an expanded metal made of stainless steel.
A grease filter for the described ventilation system.