JPH03161004A - Apparatus for removing oil in exhaust hood for kitchen - Google Patents

Abstract

PURPOSE:To remove oil in exhaust gas within a hood with high collection efficiency by providing a porous ceramic filter having high oil collection efficiency in the exhaust hood for a kitchen. CONSTITUTION:In the oil removing apparatus arranged within an exhaust hood for a kitchen, at first, an outer frame body 12 and an inner frame body 13 are provided so as to leave an interval forming an exhaust gas introducing flow passage 13 therebetween and the exhaust gas flowing in the hood 11 from the exhaust gas introducing port 12a provided to the outer frame body 12 is allowed to flow in the exhaust gas introducing flow passage 13. An opening part is provided to the inner frame body 14 facing to the exhaust gas introducing flow passage 13 to mount a filter machine 15 in a freely detachable manner. A plurality of semicylindrical filters composed of a ceramic porous material are provided to the filter machine 15 and respectively arranged so that the expanded circular arc parts thereof are turned to an exhaust gas inflow part to allow flowing exhaust gas to forcibly pass through the filters.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an oil removal device in a kitchen exhaust hood, and more specifically, to a device for removing oil from exhaust gas in a kitchen exhaust hood in a restaurant or the like. It captures the oil contained in it, automatically drains the captured oil, and
This makes it possible to automatically clean filters contaminated with oil.

Conventional technology Normally, if oil scum accumulates on the inner wall of an exhaust hood, it is likely to cause a fire due to an oxidation reaction, so local fire prevention ordinances require that the exhaust system be equipped with a filter that can remove 60% or more of oil and fat. "That" is mandatory. For this reason, various oil filters that are installed in range hoods and exhaust ducts have been conventionally provided.

For example, a so-called baffle is created by combining two plates with a special shape, forcing the exhaust gas to pass between them, giving a throttling effect to the exhaust gas as it passes through, and trapping oil with the plates. There are type filters and grease filters that have a flat plate made of porous ceramic material attached to a metal frame.

In this type of conventionally provided oil removal equipment,
A device shown in FIG. 7 is known as having relatively high oil removal performance.

In this device, in an oil removal device 2 installed in a hood 1, there are two exhaust collision plates 5 as shown in the flow path connecting an exhaust inlet 3 and an exhaust duct 4.
6, the exhaust gas is introduced in a compressed state into the exhaust gas introduction port 3, the flow velocity is reduced, and the flow is passed through the flow path, and the plates 5 and 6 capture Z-sized fine particles as well as large-diameter particles. There is. Further, a cleaning nozzle 7 is provided at the lower part of the oil removing device 2, and cleaning liquid is injected from the nozzle 7 at appropriate times to automatically clean the inside of the oil removing device 2.

Problems to be Solved by the Invention However, in the device shown in FIG. 7 above, when the displacement is large and the flow velocity is high, there are cases where the flow passes through the plates 5 and 6 without contacting them, and the plates It is not possible to capture and remove oil in the exhaust gas that circulates without coming into contact with the engine.

In addition, the cleaning nozzle 7 is configured to inject the cleaning liquid into the filter machine, and is not configured to directly inject the cleaning liquid onto the plate to be cleaned, which has the most oil attached, so that the plate cannot be effectively cleaned. I can't.

Furthermore, other oil removal devices conventionally provided, ie, the baffle type filter and the grease filter, have the drawback of low oil removal rate and the drawback that efficiency decreases with time.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks of the conventional technology.It has an extremely high oil removal rate compared to the conventional technology, and also has the ability to automatically discharge the removed oil. The purpose of the present invention is to provide an oil removal device that can be automatically cleaned.

Means for Solving the Problems Accordingly, the present invention provides an oil removal device installed in a kitchen exhaust hood, in which an outer frame body and an inner frame body are provided with an interval that forms an exhaust gas introduction flow path, and The filter machine is configured so that the exhaust gas flowing into the hood from the exhaust introduction port provided in the frame body flows into the exhaust gas introduction flow path, and an opening is provided in the inner frame body facing the exhaust gas introduction flow path. The filter machine is removably attached, and is equipped with a plurality of semi-cylindrical filters made of ceramic porous material, each of which is arranged with its bulging arcuate portion facing the exhaust gas inflow side, so that the circulating exhaust gas can The present invention provides a device for removing oil in a kitchen exhaust hood, characterized in that the oil is forced to pass through a filter.

The filter machine stores the plurality of semi-cylindrical filters made of the ceramic porous bodies in parallel without any gaps in the mouth frame, and discharges the oil captured by the filters from the Oll 1 section under the hood. A discharge hole is provided, and the oil discharged from the discharge hole automatically flows out from the discharge hole provided in the outer frame body to the discharge pipe. A nozzle that sprays the cleaning liquid is installed at the position, and for the nozzle,
Pump from the cleaning limb supply device attached to the oil removal device.
The cleaning liquid is automatically supplied when necessary via an on-off solenoid valve.

As mentioned above, the hood is equipped with a filter made of porous ceramic that has a high oil capture rate, and all of the exhaust gas is forced to pass through the filter, so that the exhaust air inside the hood has a high oil capture rate. oil can be removed. Therefore, it is possible to significantly reduce the amount of oil adhering to the inside of the duct communicating with the hood, and the number of times the inside of the duct must be cleaned can be reduced.

Furthermore, since a nozzle for spraying cleaning liquid onto the filter is provided to automatically clean the filter periodically, the filter's ability to capture oil can be maintained at a high level.

Kansei Koi Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The oil removing device 10 of the first embodiment shown in FIG. 12, an inner frame l4 disposed at a distance from the inner frame l4 to form an exhaust gas introduction path l3, a filter device 15 detachably attached to the inner frame body 14, and a filter injecting cleaning liquid toward the filter device l5. The main components are cleaning nozzles l6 and.

Outer frame body! 2 is the upper wall surface 1lb of the hood 11 as shown in the figure.
An exhaust inlet 12a is formed at the upper end in contact with the upper end, a side surface 12b slopes downward from the upper end toward the wall surface 11a, and a bottom surface 12c bends from the lower end of the side surface 12b toward the wall surface 11a. The bottom surface portion 12c is slightly inclined downward toward the wall surface 11a. A discharge port 12d for the removed oil and cleaning fluid is provided at a position close to the wall surface 11a of the bottom portion 12c, and a discharge pipe 1 is connected to the discharge port 12d.
7 is connected. A part of the side surface +2b is attached to the lid member 1 so that it can be removed when replacing the filter Iia15.
2e, and is detachably attached using screws (not shown).

The inner frame l4 installed inside the outer frame l2 at a predetermined interval has an inclined side surface l4b and a bottom surface 14c continuous with an upper side part 14a connected to the upper end of the hood upper wall surface 1lb. Filter mounting opening 1 on side part 14b
4d is provided. The lower surface of the filter mounting opening 14d is bent so that the filter I5 can be placed therein,
A filter machine installation stand 14e is formed.

Between the inclined side surface portion 14b of the inner frame l4 and the inclined side surface portion 12b of the outer frame l2 is an exhaust inlet 12a at the upper end of the outer frame.
The exhaust gas introduced from the exhaust gas introduction port 12a collides with the inner frame upper part 14a, changes its flow direction, and is introduced into the exhaust gas introduction path 13. I try to do that. In the exhaust gas introduction path l3, a filter device l5 is detachably attached to the filter attachment opening 14d, and all the exhaust gas introduced into the exhaust gas introduction path l3 is forcibly passed through the filter device l5. , so as to flow into the interior of the inner frame l4. A duct l8 extending upward and communicating with the inside of the upper frame is protruded from the upper wall of the hood located on the inner upper surface of the inner frame l4,
The exhaust gas that has passed through the filter machine 15 is discharged to the duct 18.

The above filter machine! 5 has a structure shown in FIGS. 2 and 3, and a plurality of filters 21 (4 g in this embodiment) are installed inside the upper, lower, left, and right frames 2OA, 20B, 20C, and 20D made of metal plates forming a rectangular frame. is stored. These filters 21 have a semi-cylindrical shape as shown in the figure, and are made of cordierite (2Mg0.2AltO3.5SiOt).
It is a blend type porous ceramic of alumina (AtWO,), and its microscopic structure is a three-dimensional skeletal structure with a continuous mechanism.It also has a high porosity (80-90%) and a low pressure loss. It has a structure that allows you to change its high filter performance. And, this type of ceramic has an apparent specific gravity of 0.
．． It is small and lightweight (35 to 0.60) and has a large surface area, so high catalytic reaction efficiency can be obtained.

In addition, it has excellent heat resistance and chemical resistance.

The filters 3 are housed in parallel rows without gaps in the square frame, and the upper and lower frames 20A and 20B of the square frame have the same U-shaped cross section. In addition, the left and right frames 20C, 20
D has the same shape, having a U-shaped cross section, and has wall surfaces 20C-1 and 20D-1 for connection with the upper and lower frames on its upper and lower end surfaces. A plurality of filters 21 are arranged in parallel,
While the upper and lower ends of each are inserted into the U-shaped grooves of the upper and lower frames 2OA and 20B and supported, the filters 2 on both the left and right sides are inserted.
Assemble the left and right frames 20C and 2'OD on the outside of 1 without any gaps, and in this state, the upper and lower end surfaces and the upper and lower frames 20A, 20
B is connected with a screw 22 to constitute a filter device 15.

The filter machine 15 has a lower frame 20 as shown in FIG.
D is mounted on the filter machine installation stand 14e, and the upper frame 20A is mounted.
is attached and supported on the inner surface of the inclined side surface portion 14b, and is installed in an inclined state in a detachable manner.

At the time of installation, a discharge hole 20B-1 for discharging captured oil is bored at one side corner of the lower frame 2OB, which is the lowest end thereof, at intervals. In addition, a long oil drain groove 14 is provided in the filter machine installation base 14e at a position facing the drain hole 20B-1.
r is drilled.

Therefore, the oil captured by the filter 21 is drained from the drain hole 20B.
-1, the oil falls to the bottom part 12c of the outer frame body through the oil drain groove 14f, flows down the slope to the drain port 12d, and then flows through the drain pipe l7.
It is automatically discharged to

When the filter machine 15 is attached to the opening of the inner frame 14 as described above, the semi-cylindrical bulging elliptical portion 21a is arranged so that the filter 21 faces the exhaust gas inflow side, and the filter 21 is connected to the exhaust gas. The contact surface is maximized.

The oil-trapping filter 21 is periodically removed, e.g.
In order to clean the filter once a day, two nozzles 16 for spraying a cleaning liquid toward the filter 21 are provided at intervals in the length direction of the filter machine 15. Each nozzle l6 has an inner frame l
4 is attached to the tip of a cleaning liquid supply pipe 24 that penetrates the upper surface portion 14a and protrudes into the exhaust gas introduction channel 13. The nozzle l6 for spraying water is placed at a position corresponding to the upper side of the filter 21, but by using a wide-angle spray nozzle that sprays water over a wide range on the filter 21, , make sure that the entire filter 21 can be effectively cleaned.

The purification liquid supply pipe 24 is connected to the main supply pipe 26 of a 61' purification liquid supply device 25 shown in FIG. ing. The main supply pipe 26 is connected to a washing limb tank 29 via a pump 28. The opening/closing solenoid valve 27 and the pump 28 are operated by a manual operation button (not shown), and when the button is pressed to turn on during cleaning, the solenoid valve 27
7 is opened, the pump 28 is driven, and the nozzle 16 is supplied with cleaning fluid to spray the cleaning fluid toward the filter 21.

Furthermore, a damper 28 is installed in the artificial part of the duct 18 that communicates with the inside of the inner frame 14, and a fire detection sensor 29 is installed inside the inner frame 14. When the sensor 29 detects a flame, the damper 28 is operated to close the duct 18, and the solenoid valve 27 is closed.
Then, the pump 28 is turned on and the cleaning liquid is automatically injected from the nozzle 16 to extinguish the flames.

The oil removal device according to the present invention is not limited to the above-mentioned embodiments, and for example, the storage frame of the filter 2l is pivotally attached to a frame on one side so that the frame can be opened and closed, and the filter 21 is taken out by opening the frame, or , it may be possible to store it. Furthermore, in the present embodiment, the cleaning liquid supply pipe 24 and the nozzle l6 are of a fixed type, and the nozzle l6 is a filter machine l6.
Although it is installed in a position where it does not get in the way when removing the nozzle 1, the lower part 24a to which the nozzle l6 is attached can be rotated in the direction of the chain line with respect to the upper part 2=1'b, as shown in Fig. 5. is connected to the filter machine l via the connecting fitting 30.
5 may be rotated when being removed. Furthermore, a cylinder 31 that expands and contracts with the water pressure of the sinking pipe itself is interposed in the lower pipe 24a, and the nozzle 16 is moved from the upper side to the r side along the filter 21 when spraying the cleaning liquid. , the cleaning liquid may be sequentially sprayed over the entire surface of the filter 21.

Next, the operation of the oil removal device IO having the above configuration will be explained.

Food l! The exhaust gas that has flowed into the oil removal device IO is introduced into the oil removal device IO by making a U-turn through the exhaust gas introduction port 12a at the upper end.

At that time, it collides with the outer surface of the upper part 14a of the inner frame body, and flows into the exhaust gas introduction path d 13 with a reduced flow velocity, and all the inflowing exhaust gas is forced to pass through the filter device 15 and pass through the inner frame body l.
It flows into the inside of 4. In the filter machine I5, the oil passes through contact with the filter 21, which has a large contact area, and approximately 90% of the oil in the exhaust gas is captured.

The oil separated from the exhaust gas and captured by the filter 21 flows from the discharge hole 20B-1 of the lower frame 20D, through the discharge groove l4r, to the discharge port 12d, and is automatically taken out from the discharge pipe l7.

In addition, by periodically spraying a cleaning liquid to clean the filter 2l that has been contaminated by trapping oil, the performance of the filter 2l can be refreshed and deterioration of the trapping performance can be prevented. The limb that has been cleaned through the filter 21 is also discharged from the discharge port 12d through the discharge pipe 18.

When replacing the filter 21, the fi of the outer frame 12
By removing l2e, you can easily remove the filter machine l5.
can be taken out.

FIG. 6 shows a double-sided oil removal device according to a second embodiment in which filter devices I5 are disposed on both left and right sides, which has a large displacement and is suitable for use inside a large hood 2. The oil removal device includes a filter unit 15 and an inner frame body 14.
The difference is that the exhaust gas is provided on both sides of the inner frame 14 and the exhaust gas is passed into the inner frame l4 from both sides, and the other configurations are the same as those of the previous embodiment, so the same reference numerals will be used and the explanation will be omitted.

Effects of the Invention As is clear from the above explanation, the oil removal device according to the present invention includes a plurality of filters made of ceramic porous bodies in a hood such as a range hood to efficiently remove oil from exhaust gas. A removably attached filter is used, and the filter has a semi-cylindrical shape that increases the contact area with the exhaust gas, and is installed with its bulging arcuate surface facing the exhaust inflow side. Since the filter is installed in the exhaust flow path so that the exhaust gas is forced to flow through the filter, oil can be removed with a high collection rate. Therefore, the amount of oil adhering to the inside of the duct connected to the hood can be significantly reduced compared to the conventional method, and the number of time-consuming cleaning operations inside the duct can be greatly reduced.

Moreover, since the filter that traps oil can be cleaned by spraying a cleaning liquid once a day after cleaning, the oil trapping performance of the filter can be maintained at a high level. Furthermore, since the filter device can be easily removed from the oil removal device, it has various advantages such as requiring no labor for replacement work.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a first embodiment of the oil removal device according to the present invention, Fig. 2 is a front view of the filter machine, Fig. 3 is a perspective view of the filter machine, and Fig. 4 is a cleaning liquid supply device. FIG. 5 is a schematic diagram showing a modification of FIG. 1, and FIG.
The figure is a schematic diagram showing a second embodiment of the oil removal device of the present invention, and FIG. 7 is a schematic diagram showing a conventional oil removal device.

Claims (1)

[Scope of Claims] 1. An oil removal device installed in a kitchen exhaust hood, wherein an outer frame body and an inner frame body are provided with an interval to form an exhaust gas introduction flow path, and the oil removal device is provided in the outer frame body. The exhaust gas flowing into the hood from the exhaust gas introduction port is caused to flow into the exhaust gas introduction flow path,
An opening is provided in the inner frame body facing the exhaust gas introduction channel, and a filter device is detachably attached to the inner frame body, and the filter device is equipped with a plurality of semi-cylindrical filters made of a ceramic porous material, and these filters are installed. An oil removal device in a kitchen exhaust hood, characterized in that the bulging arcuate portions are respectively disposed toward the exhaust gas inflow side, and the circulating exhaust gas is forced to pass through a filter. 2. The oil removal device according to claim 1, further comprising a nozzle for spraying cleaning liquid installed at a position facing the filter device. 3. The above-mentioned filter machine stores the semi-cylindrical filters made of the plurality of ceramic porous bodies in parallel without gaps in a rectangular frame, and stores the oil captured by the filters in the lower part of the frame. Claims 1 and 2 characterized in that a discharge hole is provided, and the oil discharged from the discharge hole automatically flows out from the discharge hole provided in the outer frame body to a discharge pipe. oil removal device.