JP2020171919A - Multilayer type grease filter and baffle type filter - Google Patents

Abstract

To facilitate washing and replacement work of a filter, continue using with only a rear-face filter while a front-face filter is removed, and reduce a state where cooking is disabled, as much as possible.SOLUTION: A multilayer type grease filter is constituted of two front and rear filters including a front-face filter and a rear-face filter which are arranged along an exhaust flow passage, where the front-face filter is installed detachably relative to the rear-face filter and the rear-face filter has a grease removal ratio of 75% or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to a grease filter that is installed at an exhaust port of a kitchen facility and captures and removes oils and fats contained in the exhaust.

Conventionally, a grease filter (hereinafter, simply referred to as a filter) that captures and removes oils and fats contained in the exhaust such as oil smoke generated in a kitchen has adhered after long-term use in order to maintain the performance of the filter. It is necessary to regularly clean the dirt made of oils and fats, and generally, the filter is replaced with a filter that has been cleaned by the rental company or a new filter, and the dirty filter is taken back by the rental company for cleaning. Is the reality. (See Patent Documents 1 and 2)

However, in the conventional filter replacement work, since the entire filter installed at the exhaust port is replaced, the weight is heavy and the volume is also bulky, so that there is a problem for the rental company in terms of both work and cost. It was.

Also, if the filter is not rented but owned by the shop owner or building owner, the exhaust port will be exposed while cleaning the dirty filter, and cooking will not be possible during that time, so cleaning work will be done at midnight outside business. There was also the problem of being forced.

In Patent Document 3 (Japanese Unexamined Patent Publication No. 2019-2011), the filter has a multi-layer structure of a porous filter on the front surface side and a baffle type filter on the rear surface side, and the porous body filter on the front surface side is referred to the baffle type filter on the rear surface side. A grease filter that is detachably configured is disclosed. However, the multi-layered filter cannot be used only by the baffle type filter on the rear surface side with the porous body filter on the front surface removed for cleaning, and after all, during cleaning of the porous body filter on the front surface side. It could only be used again after the kitchen was stopped and replaced with a new front porous filter.

Japanese Unexamined Patent Publication No. 2003-240298 JP 2015-167910 JP-A-2019-2011

The present invention solves the above-mentioned problems of the prior art, facilitates cleaning and replacement of the filter, and even during cleaning of the front filter (even when the front filter is removed), the rear filter. The purpose is to reduce the situation where cooking is not possible as much as possible.

The first invention of the present application is a grease filter installed at an exhaust port of a kitchen facility in order to solve the above problems, and the grease filter is a front filter and a rear filter arranged along an exhaust flow path. The front filter is detachably attached to the rear filter, and the front filter and the rear filter are made of metal or ceramic, and the oil / fat removal rate of the rear filter is high. It is characterized by being 75% or more.

Further, the second invention of the present application is a rear surface filter adopted in the first invention, the rear surface filter is a metal baffle type filter, and the front filter and the back filter are detachably engaged with each other. It has a two-layer structure, and has a plurality of front filter pieces and a plurality of back filter pieces installed in parallel on the front frame constituting the front filter and the back frame constituting the back filter, respectively. And the back filter piece are arranged so as to face each other, and in an engaged state with the front filter on the lower side and the back filter on the upper side, the front filter piece is viewed in a cross section orthogonal to the length direction. A first horizontal plane having a predetermined width, a first inclined surface that bends upward at an angle of 35 degrees from the first horizontal plane symmetrically on both sides of the first horizontal plane, and an angle of 50 degrees from the first horizontal plane. The back filter piece has a second inclined surface that bends further upward, and the back filter piece is symmetrical with the second horizontal plane having a predetermined width on both the left and right sides of the second horizontal plane in a cross-sectional view orthogonal to the length direction. It has a third inclined surface that bends downward at an angle of 35 degrees from the second horizontal plane and a fourth inclined surface that bends further downward at an angle of 80 to 85 degrees from the third inclined surface, and two adjacent surfaces. The first inclined surface and the second inclined surface of the front filter piece are located within the width of the pair of left and right third inclined surfaces and the fourth inclined surface of the back filter piece, and the second inclined surface. The tip height position of the fourth inclined surface is the same as or slightly higher than the tip height position of the fourth inclined surface.

Further, the third invention of the present application is the rear surface filter adopted in the first invention, the rear surface filter is a metal baffle type filter, and the front filter and the back filter are detachably engaged with each other. It has a two-layer structure, and has a plurality of front filter pieces and a plurality of back filter pieces installed in parallel on the front frame constituting the front filter and the back frame constituting the back filter. And the back filter piece are arranged so as to face each other, and in an engaged state with the front filter on the lower side and the back filter on the upper side, the front filter piece is viewed in a cross section orthogonal to the length direction. The back filter piece has a first horizontal plane having a predetermined width and a first inclined surface that bends upward at an angle of 35 degrees from the first horizontal plane symmetrically on both sides of the first horizontal plane. A second horizontal plane having a predetermined width, a third inclined surface that bends downward at an angle of 35 degrees from the second horizontal plane symmetrically to the left and right sides of the second horizontal plane, and the second horizontal plane in a cross-sectional view orthogonal to the direction. It has a fourth inclined surface that bends further downward at an angle of 90 degrees from the three inclined surfaces, and the first inclined surface of two adjacent front filter pieces is a pair of left and right first inclined surfaces of one back filter piece. It is located within the width of the three inclined surfaces and the fourth inclined surface, and the tip height position of the first inclined surface is the same as or slightly higher than the tip height position of the fourth inclined surface. ..

According to each invention of the present application, the grease filter has a two-layer structure in which the front filter and the rear filter are detachable, and the oil / fat removal rate of the rear filter is set to "Fire Prevention Ordinance Regulations Article 3-4, Paragraph 1, Item 3". By setting it to 75% or more, which is the Japanese domestic standard set by the Fire and Disaster Management Agency, after a certain period of use, the front filter with significant grease and other stains can be removed from the rear filter for cleaning. Even if only the rear filter is attached to the exhaust port, it can be used as it is.

For example, when letting a rental company manage the filter, the rental company cleans the front filter, which is heavily contaminated with oil, in a short cycle of several weeks to one month, and the rear filter once every few months, or once every quarter or six months. As a result, the replacement work load is reduced, the work efficiency is improved, and when the filter is transported to the outside by a rental company, as compared with the conventional method of frequently replacing the entire filter. It is not bulky, maintenance and cleaning efficiency can be improved, and cost reduction can be realized.

Also, if the filter is privately owned rather than rented, the rear filter will remain set in the exhaust port and meet Japanese standards even while the dirty front filter is frequently removed and cleaned. Since it meets the requirements, it can be used as it is. That is, even if the front filter is removed and washed during business hours, cooking can be continued during that time by the remaining rear filter, which does not interfere with normal business. It should be noted that the rear filter also needs to be cleaned once every few months, or once every quarter or six months as in the conventional case, but the frequency can be significantly reduced.

Further, the baffle type filter of the present invention has a thin structure of 15 mm or less in thickness, has a fat removal rate of 75% or more, and can be used alone without a front filter.

The whole structure explanatory drawing of the grease filter which concerns on this invention. Explosive structure explanatory view of the front filter and the rear filter. Explosive structure explanatory view of the rear filter. Partial sectional view of the rear surface filter which concerns on 1st Embodiment. FIG. 3 is a partial cross-sectional view of the rear filter according to the second embodiment. FIG. 3 is a partial cross-sectional view of the rear filter according to the third embodiment. FIG. 3 is a partial cross-sectional view showing Comparative Example 1 of a rear filter. FIG. 2 is a partial cross-sectional view showing Comparative Example 2 of the rear filter. FIG. 3 is a partial cross-sectional view showing Comparative Example 3 of a rear filter. Structural explanatory view of the first example of the front filter. Structural explanatory view of the second example of the front filter. Structural explanatory view of the third example of the front filter.

Hereinafter, embodiments of the present invention will be described in detail.
1 and 2 are views showing the overall structure and the disassembled structure of the grease filter 1 (hereinafter, filter 1) according to the present invention. As shown in the figure, the filter 1 has a two-layer structure consisting of a front filter 2 and a rear filter 3 along the exhaust path indicated by an arrow, and the front filter 2 has a sash-type structure (bran) with respect to the rear filter 3. It is detachably fitted by the fitting type structure found in sliding doors and sliding doors.

Specifically, as shown in FIG. 2, the front filter 2 is fitted into the U-shaped rail 4 formed along the upper and lower sides of the rear filter 3, and the front surface of the U-shaped rail 4 is fitted. The filter 2 is slidably supported to the left and right.

When removing the front filter 2 from the rear filter 3, the handles 5 provided on both sides of the front filter 2 may be used to slide it laterally, or the front filter 2 may be lifted up once to remove the bran and shoji. , You can also remove it so that the lower side is pulled out toward you.

The filter 1 installed in the kitchen equipment in the building reduces the adhesion of oils and fats that can cause a serious fire in the exhaust ducts stretched inside the building. The removal rate is required to have a performance of 75% or more based on the provisions of "Fire Prevention Ordinance Regulations Article 3-4, Paragraph 1, Item 3".

First, the configuration of the rear surface filter 3 in the present embodiment will be described. In this embodiment, a stainless steel baffle type filter is adopted for the purpose of weight reduction and cost reduction.

The rear surface filter 3 has a performance of a fat removal rate of 75% or more because it can be used alone (use that satisfies the above criteria) even when the front surface filter 2 is removed for cleaning. ..

FIG. 3 shows the detailed structure of the rear filter 3 in an exploded state.
The rear filter 3 has a two-layer structure in which the front filter 31 and the back filter 32 are detachably engaged with each other, and the front filter 31 and the back filter 32 have a long hole portion 6 on the front filter side and a back filter 32. It is detachably engaged by the locking portion 7 on the filter side.

As shown in the drawing, the table filter 31 is entirely surrounded by the table frame 33, and a plurality of table filter pieces 34 are installed in parallel in the space surrounded by the table frame 33.

Further, the back filter 32 is also surrounded by the back frame 35 as a whole like the front filter 31, and a plurality of back filter pieces 36 are installed in parallel in the space surrounded by the back frame 35. ..

FIG. 4 is a partial cross-sectional view of the rear surface filter 3 according to the first embodiment (Example 1). The figure shows a cross section in a direction orthogonal to the length direction of the front filter piece 34 and the back filter piece 36 in a state where the front filter 31 and the back filter 32 are engaged in a predetermined relationship.

The front filter piece 34 and the back filter piece 36 are arranged so as to face each other, and as shown in the figure, the front filter piece 34 is in an engaged state with the front filter 31 on the lower side and the back filter 32 on the upper side. A first horizontal plane 34-1 having a predetermined width and a first inclined surface 34-2 that bends upward at an angle of 35 degrees from the first horizontal plane 34-1 symmetrically on both sides of the first horizontal plane 34-1. It has a second inclined surface 34-3 that bends further upward at an angle of 50 degrees from the first inclined surface 34-2.

On the other hand, the back filter piece 36 bends downward at an angle of 35 degrees from the second horizontal plane 36-1 symmetrically with the second horizontal plane 36-1 having a predetermined width on both sides of the second horizontal plane 36-1. It has a third inclined surface 36-2 and a fourth inclined surface 36-3 that bends further downward at an angle of 85 degrees from the third inclined surface 36-2.

The front filter piece 34 and the back filter piece 36 having the above cross-sectional shape have the first inclined surface 34 of two adjacent front filter pieces 34 in a state where the front filter 31 and the back filter 32 are engaged in a predetermined relationship. -2 and the second inclined surface 34-3 are located within the width of the pair of left and right third inclined surfaces 36-2 and the fourth inclined surface 36-3 of one back filter piece 36, and the second inclined surface 36-3. The tip height position of the surface 34-3 is slightly higher than the tip height position of the fourth inclined surface 36-3. The tip height position of the second inclined surface 34-3 and the tip height position of the fourth inclined surface 36-3 may be substantially the same position.

FIG. 5 is a partial cross-sectional view of the rear surface filter 3 according to the second embodiment (Example 2). The figure shows a cross section in a direction orthogonal to the length direction of the front filter piece 34 and the back filter piece 36 in a state where the front filter 31 is on the lower side and the back filter 32 is on the upper side in a predetermined relationship. ing.

The structure of the rear surface filter 3 according to the second embodiment is basically the same as that of the rear surface filter 3 according to the first embodiment, except that the fourth inclined surface 36-3 of the back filter piece 36 is different. It is a point that is bent downward at an angle of 80 degrees with respect to the third inclined surface 36-2.

FIG. 6 is a partial cross-sectional view of the rear surface filter 3 according to the third embodiment (Example 3). The figure shows a cross section in a direction orthogonal to the length direction of the front filter piece 34 and the back filter piece 36 in a state where the front filter 31 and the back filter 32 are engaged in a predetermined relationship.

The front filter piece 34 and the back filter piece 36 are arranged so as to face each other, and as shown in the drawing, the front filter piece 34 is in a predetermined state in an engaged state with the front filter 31 on the lower side and the back filter 32 on the upper side. It has a first horizontal plane 34-1 having a width and a first inclined surface 34-2 that bends upward at an angle of 35 degrees from the first horizontal plane 34-1 symmetrically on both sides of the first horizontal plane 34-1. There is.

The back filter piece 36 has a second horizontal plane 36-1 having a predetermined width and a third inclination that bends downward at an angle of 35 degrees from the second horizontal plane 36-1 symmetrically on both sides of the second horizontal plane 36-1. It has a surface 36-2 and a fourth inclined surface 36-3 that bends further downward at an angle of 90 degrees from the third inclined surface 36-2.

In the above structure, the first inclined surface 34-2 of the two adjacent front filter pieces 34 is the width of the pair of left and right third inclined surfaces 36-2 and the fourth inclined surface 36-3 of one back filter piece 36. It is located inside, and the tip height position of the first inclined surface 34-2 is the same as or slightly higher than the tip height position of the fourth inclined surface 36-3. The tip height position of the first inclined surface 34-2 and the tip height position of the fourth inclined surface 36-3 may be substantially the same position.

The rear surface filter 3 according to the first embodiment, the second embodiment, and the third embodiment has a thickness of 15 mm or less in a state where the front filter 31 and the back filter 32 are engaged in a predetermined relationship. The stainless steel baffle type filter according to each embodiment has a fat removal rate of 75% or more because the front filter piece 34 and the back filter piece 36 have the above-mentioned characteristic structure while suppressing the thickness to 15 mm or less. be able to.

In Table 1, the stainless steel baffle type filters having the structures shown in FIGS. 7, 8 and 9 are referred to as Comparative Example 1, Comparative Example 2 and Comparative Example 3, respectively, and the oil / fat removal rate performance of the rear surface filter 3 according to each of the above embodiments. It shows the result of the test. 7 and 8 are comparative examples of the first and second embodiments, and FIG. 9 is a comparative example of the third embodiment. The measurement test was carried out in accordance with the "Grease Removal Performance Test Method for Grease Filters" of the Japan Kitchen Industry Association. The filters according to each Comparative Example shown in FIG. 7 (Comparative Example 1), FIG. 8 (Comparative Example 2), and FIG. 9 (Comparative Example 3) are inclined in the front filter piece and the back filter piece as shown in detail in the figure. It is configured by making the inclination angle of the surface different. Further, the thickness of the filter in each comparative example is 15 mm, which is the same as in Examples 1, 2 and 3. The units of each dimension shown in FIGS. 4 to 9 are all mm.

As shown in Table 1, the rear surface filter (baffle type filter) having the structure according to each embodiment of the present invention has a performance of a fat removal rate of 75% or more even though it has a thin thickness of 15 mm, which will be described below. Even without a front filter, it alone meets domestic standards.

In the rear filter of each embodiment of the present invention, as described above, the front filter piece 34 and the back filter piece 36 each have an inclined surface due to a unique combination, so that the relationship between the air flow and the pressure loss can be determined. It has a fat removal rate of 75% or more (see the fat removal rates of Comparative Examples 1, 2 and 3 in Table 1).

The rear surface filter 3 is not limited to the stainless steel baffle type filter described above, but is any single unit of a metal porous type filter, a metal mesh type filter, a metal demister type filter, a ceramic porous body type filter, and a ceramic mesh type filter. Filter, or a multi-layer filter composed of a combination thereof.

If the filter has the above-mentioned other configuration, the oil / fat removal rate is 75% or more at a thickness of 15 mm or less by appropriately selecting the hole diameter, mesh density, material, etc. without using a special structure. Performance of (or higher removal rate) can be easily realized.

The reason why the stainless steel baffle type filter having the above-mentioned special structure is adopted in each embodiment is that it has advantages in terms of cost, ease of cleaning, and lightness, and is the most practical. If these issues are ignored, as described above, any single filter of metal porous filter, metal mesh filter, metal demister filter, ceramic porous filter, ceramic mesh filter, or these It is not particularly limited as long as it is a multi-layer filter composed of a combination and having an oil / fat removal rate of 75% or more.

Next, the configuration of the front filter 2 will be described. The front filter 2 is detachably set on the rear filter 3 described above, and its thickness is preferably 12 mm or less. Further, the oil / fat removal rate is not required to be as high as that of the rear filter 3, but the grease filter 1 in the state of being set in the rear filter 3 as a whole has an oil / fat removal rate of 80% or more, more preferably 85% or more. It is desirable to have.

The front filter 2 is a filter composed of a metal or ceramic porous filter, a metal or ceramic mesh filter, a metal or ceramic punching metal filter, a metal demister filter, or a metal fiber filter. Alternatively, it may be a multilayer filter composed of a combination of these.

10 to 12 show some configuration examples of the front filter 2.
The first example shown in FIG. 10 has a two-layer structure in which the front side is a corrugated lath net A and the back side is a flat lath net B. In the second example shown in FIG. 11, the front side is a flat lath net C and the back side is nickel. In the third example shown in FIG. 12, which has a two-layer structure of a porous body D, the front side is a flat lath net (coarse type) E, the middle is a corrugated lath net F, and the back side is a flat lath net (fine type). Although this is an example of a front filter having a three-layer structure of G, the configuration of the front filter 2 is not particularly limited to these.

As described above, the oil / fat removal rate of the various front filters 2 may be the rear filter 3 or less, and various types can be prepared depending on the situation of the kitchen to be used. For example, a Chinese restaurant with a large amount of oily smoke may use a food with a high removal rate, and a Japanese restaurant with a small amount of oily smoke may use a food with a low removal rate.

In any case, the front filter 2 has a structure having an oil / fat removal rate suitable for the environment in which it is used so that it is sufficient to wash the front filter 2 once a few weeks to once a month and the rear filter 3 once every two months to half a year. You can use the one. In a Japanese restaurant or the like where there is little oil smoke, the replacement cycle of the front filter 2 and the rear filter 3 can be longer than in a Chinese restaurant or the like where there is a lot of oil smoke.

Since the thickness of the grease filter installed in the kitchen equipment in the building is 30 mm or less according to the Japanese domestic standard, the thickness of the front filter 2 and the rear filter 3 is the same 12 mm or less in each embodiment. Although it is set to 15 mm or less, the total thickness may be 30 mm. In addition, in foreign countries where the oil removal rate and the total thickness, which are different from the Japanese standards and standards, are specified, the range may be set in the foreign countries.

In each of the above-described embodiments, the front filter 2 is detachable from the rear filter 3 by a devouring type, but the structure is not particularly limited as long as it has a structure such as a screw type, a hanging type, or a hook type.

As described above, the grease filter according to the present invention has a two-layer structure in which the front filter 2 is detachable from the rear filter 3 and the oil / fat removal rate of the rear filter 3 is 75% or more. There is no need to take the entire filter home for cleaning once a few weeks to once a month as in the past. By removing only the heavily soiled front filter 2 and taking it home, and replacing it with the cleaned front filter 2. , Maintenance efficiency can be improved and cost reduction can be realized. In addition, the burden of replacement work is reduced, the work efficiency is high, the transportation is not bulky, and the effect of suppressing the environmental load can be expected.

Furthermore, if the filter is privately owned rather than rented, the exhaust port is not exposed and the rear filter 3 that meets the standard is used as the exhaust port even while the front filter 2 is heavily soiled and cleaned. Since it is attached, cooking can be continued during that time, and it is possible to greatly reduce the hindrance to normal business.

1 Grease filter 2 Front filter 3 Rear filter 4 U-shaped rail 5 Handle 6 Long hole 7 Locking part 31 Front filter 32 Back filter 33 Front frame 34 Front filter piece 34-1 First horizontal plane 34-2 First inclined surface 34 -3 Second inclined surface 35 Back frame 36 Back filter piece 36-1 Second horizontal plane 36-2 Third inclined surface 36-3 Fourth inclined surface

Claims (7)

A grease filter installed at the exhaust port of kitchen equipment.
The grease filter is composed of two filters, a front filter and a rear filter, which are arranged along the exhaust flow path.
The front filter is detachably attached to the rear filter and is attached.
The front filter and the rear filter are metal or ceramic filters.
The oil / fat removal rate of the rear filter is 75% or more.
A multi-layer grease filter that features this. The multilayer grease filter according to claim 1, wherein the thickness of the front filter is 12 mm or less, and the thickness of the rear filter is 15 mm or less. The rear surface filter is any one of a metal baffle type filter, a metal porous type filter, a metal mesh type filter, a metal demister type filter, a ceramic porous type filter, and a ceramic mesh type filter, or a combination thereof. The multi-layer grease filter according to claim 1 or 2, wherein the multi-layer filter is made of. The front filter may be a metal or ceramic porous filter, a metal or ceramic mesh filter, a metal or ceramic punching metal filter, a metal demister filter, a metal fiber filter, or a single filter. The multi-layer grease filter according to any one of claims 1 to 3, wherein the multi-layer filter is composed of a combination of these. The multilayer grease filter according to any one of claims 1 to 4, wherein the oil / fat removal rate of the front filter and the rear filter combined is 80% or more. A rear surface filter used in the multilayer grease filter according to any one of claims 1 to 5.
The rear filter is a metal baffle type filter, and has a two-layer structure in which a front filter and a back filter are detachably engaged with each other.
The front frame constituting the front filter and the back frame constituting the back filter have a plurality of front filter pieces and a plurality of back filter pieces installed in parallel with each other.
The front filter piece and the back filter piece are arranged so as to face each other.
In an engaged state with the front filter on the lower side and the back filter on the upper side.
The front filter piece is a cross-sectional view orthogonal to the length direction.
A first horizontal plane having a predetermined width, a first inclined surface that bends upward at an angle of 35 degrees from the first horizontal plane symmetrically on both sides of the first horizontal plane, and an angle of 50 degrees from the first horizontal plane. Has a second inclined surface that bends further upwards at
The back filter piece is a cross-sectional view orthogonal to the length direction.
A second horizontal plane having a predetermined width, a third inclined surface that bends downward at an angle of 35 degrees from the second horizontal plane symmetrically on both sides of the second horizontal plane, and 80 to 85 degrees from the third inclined plane. Has a fourth inclined surface that bends further downward at the angle of
The first inclined surface and the second inclined surface of the two adjacent front filter pieces are located within the width of the pair of left and right third inclined surfaces and the fourth inclined surface of the back filter piece.
The tip height position of the second inclined surface is the same as or slightly higher than the tip height position of the fourth inclined surface.
A baffle type filter that is characterized by this. A rear surface filter used in the multilayer grease filter according to any one of claims 1 to 5.
The rear filter is a metal baffle type filter, and has a two-layer structure in which a front filter and a back filter are detachably engaged with each other.
The front frame constituting the front filter and the back frame constituting the back filter have a plurality of front filter pieces and a plurality of back filter pieces installed in parallel with each other.
The front filter piece and the back filter piece are arranged so as to face each other.
In an engaged state with the front filter on the lower side and the back filter on the upper side.
The front filter piece is a cross-sectional view orthogonal to the length direction.
It has a first horizontal plane having a predetermined width and a first inclined surface that bends upward at an angle of 35 degrees from the first horizontal plane symmetrically on both sides of the first horizontal plane.
The back filter piece is a cross-sectional view orthogonal to the length direction.
A second horizontal plane having a predetermined width, a third inclined surface that bends downward at an angle of 35 degrees from the second horizontal plane symmetrically on both sides of the second horizontal plane, and an angle of 90 degrees from the third inclined surface. Has a fourth inclined surface that bends further downward at
The first inclined surface of the two adjacent front filter pieces is located within the width of the pair of left and right third inclined surfaces and the fourth inclined surface of the back filter piece.
The tip height position of the first inclined surface is the same as or slightly higher than the tip height position of the fourth inclined surface.
A baffle type filter that is characterized by this.