JPS627952Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an oil catcher for an exhaust canopy.

Conventionally, exhaust canopies are installed on the ceilings of kitchens in restaurants, etc., but grease filters are attached to these canopies to remove oil and fat contained in the exhaust air. The oil flows out from the grease filter and is stored in the oil receiving gutter provided at the lower end of the canopy.

However, since the conventional oil catch gutter is installed at the lower end of the canopy, the oil catch gutter is close to the combustion source, and the oil and fat in the oil catch gutter can catch fire due to sparks contained in the exhaust gas. It was in a dangerous state of use.

In this design, a substantially conical canopy that gradually expands downward is housed inside a cylindrical exterior frame, and the space between the exterior frame and the canopy is used as an exhaust circulation space through which exhaust gas flows. A grease filter is attached to the surrounding wall surface by cutting out a part of the surrounding wall, and a cylindrical perforated shielding plate with many holes bored on the outer periphery is installed above the center of the upper end of the canopy. The upper end opening of the hole shielding plate is connected to the exhaust duct, and the lower end periphery of the canopy and the lower end periphery of the exterior frame are closed via the oil catch gutter provided on the lower end periphery of the exterior frame. The purpose is to provide an oil catcher for the exhaust canopy.

Describing the embodiment of this invention in detail with reference to the drawings, 1 is a canopy, which is opened in the ceiling of a kitchen in a restaurant, etc. in a downwardly expanding shape, and the upper part is connected to an exhaust duct. ing.

An opening 2 is provided in the upper center of the canopy 1, and an inclined slide damper 3, which is normally closed, is provided in the opening 2, and a fire prevention air volume adjustment/damper provided at the duct entrance is provided. 8 is configured so that it can be opened when adjusting.

A grease filter 4 is provided as far down as possible on the circumferential side wall of the canopy 1, and the grease filter 4 is placed at a position as close as possible to the fire source in the cooking area below the canopy. This is to improve the intake efficiency of the exhaust gas and prevent the exhaust gas from escaping outside the canopy as much as possible.

An oil catch gutter 5 is provided at the lower end of the peripheral wall of the canopy 1, and the oil catch gutter 5 is integrally connected to the lower end of an exterior frame 6 that covers the upper part of the canopy 1 to form an exhaust circulation space S. ing. The lower end peripheral portions of the canopy 1 and the exterior frame 6 are closed by the oil receiving gutter 5.

The oil receiving gutter 5 contains an oil decomposition liquid 5-1, for example, contains an aqueous solution such as a detergent, and an oil outflow valve 5-2 is connected to the gutter 5.

A perforated shielding plate 7 is formed in a cylindrical shape in the circulation space S formed by the exterior frame 6 above the center of the canopy 1, and a duct 9 is provided at the cylindrical upper end opening of the perforated shielding plate 7. are communicating.

The embodiment of this invention is constructed as described above, and includes a canopy 1 and an exterior frame 6 on the outside thereof.
The exhaust circulation space S formed between the canopy 1 and the grease filter 4 provided on the outer peripheral wall of the canopy 1 are communicated with each other.
Exhaust air circulation and grease filter 4 are achieved by connecting the oil catch gutter 5 to the lower end of the outer frame 6 and the outer frame 6.
The process of storing the fats and oils that have flowed out is as follows.

In other words, the smoke produced by cooking below the canopy 1 is sucked into the inside of the canopy 1, and the smoke that rises to the top inside the canopy descends along the slope of the inner circumferential surface of the canopy, and the smoke rises midway through the canopy. The exhaust gas is sucked and filtered by a grease filter 4 located at the top of the exhaust gas filter 4 to perform the first removal of oil and fat, and then the exhaust gas that has passed through the grease filter 4 reaches a circulation space S formed between the canopy 1 and the exterior frame 6. While being temporarily stored here, it is sucked into the holes of the perforated shielding plate 7 and reaches the exhaust duct 8. At this time, when being sucked through the holes of the perforated shielding plate 7, the second removal of the oil and fat content is carried out. It is something that is done;
The exhaust flow process from the inside of the canopy 1 to the exhaust duct 8 is in a meandering state, and the oil removal operation is performed twice in the middle, thereby achieving an effective oil removal function.

The removed oil and fat in the exhaust air travels along the outer wall of the canopy and is stored in the oil-receiving gutter 5, where the oil and fat are chemically decomposed with an oil-decomposing liquid stored in advance. .

Incidentally, the oil and fat that has been chemically decomposed by the oil decomposition liquid 5-1 is taken out by the oil spill valve 5-2 during cleaning.
What is necessary is to replenish the oil receiving gutter 5 with the oil decomposition liquid 5-1 again.

According to this invention, since there is a grease filter and a perforated shielding plate in the exhaust gas flow process from inside the canopy to the exhaust duct, the removal efficiency of oil and fat in the exhaust gas is high. However, since the exterior frame surrounds the outer periphery of the canopy, it does not scatter outside of the exterior frame, and therefore the canopy does not flow downward. It is hygienic as there is no risk of leakage into the cooking area.

The same thing can be said about the dirt and dust that accumulates on the outer surface of the canopy.

Furthermore, during the exhaust gas flow process, the exhaust flow speed is repeatedly varied by the holes in the grease filter and the shielding plate, so that, in combination with the meandering flow of the exhaust gas, the efficiency of removing oil and fat can be further improved. Furthermore, the oil and fat removed by the grease filter installed on the outer slope of the canopy and the perforated shield plate above the center of the canopy travels along the outer surface of the canopy and is concentrated in the oil receiving gutter where the oil decomposition liquid is stored. If necessary, an oil-decomposing liquid can be stored in the oil-receiving gutter to chemically decompose the oil and fat at all times, and when cleaning, the chemically decomposed oil and fat can be easily removed from the oil. Since the oil and fat can be taken out by the outflow valve and has been chemically decomposed, there is no risk of ignition from the source of the fire in the cooking area, and this is an effective device from the point of view of fire prevention.

[Brief explanation of the drawing]

FIG. 1 shows the state of use of the oil receiving gutter according to the invention. 1: Canopy, 4: Grease filter, 5: Oil receiving gutter, 5-1: Oil decomposition liquid, 5-2: Oil spill valve, 6: Exterior frame, 7: Perforated shielding plate, S: Distribution space.

Claims (1)

[Scope of utility model registration request] A substantially conical canopy 1 that gradually expands downward is housed inside a cylindrical exterior frame 6, and the space between the exterior frame 6 and the canopy 1 is an exhaust circulation space S through which exhaust gas flows.
A grease filter 4 is attached to the peripheral wall surface of the canopy 1 by cutting out a part of the peripheral wall, and a cylindrical perforated shielding plate with a large number of holes bored on the outer periphery is installed above the center of the upper end of the canopy 1. 7 are connected in series, the upper end opening of the perforated shielding plate 7 is connected to the exhaust duct, and the lower end periphery of the canopy 1 and the lower end periphery of the exterior frame 6 are connected to the lower end periphery of the exterior frame 6. The oil receiving gutter of the exhaust canopy is closed through the oil receiving gutter 5.