JPH02282639A - Range hood - Google Patents

Abstract

PURPOSE:To enlarge the area effective for the suction against a limited availability for an opening and achieve a high efficiency in the discharge of fumes for a small amount of air for suction by providing in the middle of the main body of a hood a fan casing having a suction port in the front and another at the back and by providing a filter on the side of the front and another on the side of the wall so as to effect suction from both the front and the back. CONSTITUTION:In the main body 1 of a hood are formed suction openings 2, one suction opening on the side of the front and the other suction opening on the side of the wall, with a filter-supporting plate 10 between the two suction openings 2 and also a fan casing 6 having suction ports 3, one on the front side and another on the backside; a filter 9 is provided in the passage of air formed by the suction opening 2 and the suction port 3 both in the front and another filter 9 is provided in the passage of air formed by the suction opening 2 and the suction port 3 both at the back. By driving an electric motor 4 fumes of waste gas and lampblack produced by cooking are drawn toward the wall 7, as they rise, with a current of indoor air; a greater portion of the fumes of waste gas and lampblack flow into the main body 1 of the hood through the suction opening 2 on the side of the wall where the filter-supporting plate 10 does not obstruct the flow, and are sucked into the fan casing 6 through the suction port 3 on the backside and discharged to the outside. A portion of the fumes of waste gas and lampblack in the front impinge against the filter-supporting plate 10 but most of them, except a small quantity of them escaping to the room from the sides, flow into the main body 1 of the hood and are discharged to the outdoors.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cooking exhaust system for exhausting exhaust gas, oil smoke, odor, etc. generated from a cooking appliance to the outdoors.

2. Description of the Related Art Conventionally, this type of range hood has a structure as shown in FIGS. 7 to 9. That is, it is attached to the wall surface 7 of the house so as to be located above the cooking utensil, and the suction port 2 is installed on the bottom surface.
On the wall side of the hood body 1 having a suction hole 3 only on the front side.
A fan casing 13 having a built-in electric motor 4 and blades 12 is provided, and the ventilation passage connecting the suction port 2 and the suction hole 3 is located below the fan casing 13 with the upper part of the hood main body 1 and the lower part of the fan casing 13 having the suction port 2. A filter 9 was disposed that abuts on a filter receiving plate 1o, which is a substantially rectangular flat plate provided so as to cover the corresponding portion.

In the above configuration, the exhaust gas, oil smoke, etc. generated from the cooking appliance rises along the wall surface 7 by operating the electric motor 4, passes through the filter 9, is sucked in through the suction hole 3, passes through the blade 12, and then flows out from the duct 8. It was something that would be discharged.

Problem to be Solved by the Invention However, in such a conventional configuration, when the electric motor 4 is operated, the exhaust gas generated from the cooking utensil,
In addition to oil smoke, indoor air flows in from the front, so exhaust gas and oil smoke generated from cooking utensils rise as they rise.
Due to the flow of indoor air shown by the dotted line arrow in FIG. There was a problem in that the filter receiver provided so as to close it collided with the plate 10, and if the intake air volume was small, a large amount would leak into the room from both sides of the hood main body 10, as shown in FIG.

The present invention is intended to solve these problems, and its first objective is to expand the limited suction area of the suction port and achieve high collection performance with a small suction air volume. The second purpose is to average the flow of the suction airflow at the suction port.

Means for Solving the Problems In order to achieve the first object, the first means of the present invention is to provide a hood main body that is attached to a wall of a house so as to be located above a cooking utensil and has a suction port that opens at the bottom surface; This hood body is provided in the center inside and has suction holes on the box-shaped front and rear faces, and the upper surface communicates with the outside through the hood body, and includes a fan casing with a built-in electric motor and blades, and A range hood consisting of two filters disposed in the ventilation path connecting two suction holes and the suction port of the hood body, and a filter holder located below the fan casing and supported in contact with the lower part of the filter, which is made of a plate. The structure is as follows.

A second means for achieving the second object is that the filter receiving plate in the first means is shaped such that the center portion thereof protrudes downward in a substantially V-shape.

Effect: Due to the configuration of the first means, most of the exhaust gas and oil smoke generated from the cooking utensils and rising while being attracted to the wall flow into the hood body through the suction port on the wall side of the hood body, and are absorbed into the suction hole on the rear surface of the fan casing. It passes through the blades and is discharged from the duct. In addition, after the exhaust gas and oil smoke that flowed forward and collided with the filter receiving plate collided with each other, most of them were divided into the suction port on the front side of the hood body and the suction port on the wall side and flowed into the hood body. It will be discharged from the duct through the suction hole of the vane.

With the configuration of the second means, the exhaust gas and oil smoke rising toward the filter receiving plate are separated into the suction port on the front side of the hood body and the suction port on the wall side at the protruding part without colliding with the filter receiving plate. It flows into the hood body, passes through the blades through the suction holes on the front and rear surfaces of the fan casing, and is discharged from the duct.

Embodiment First, an embodiment according to the first means of the present invention will be described based on FIGS. .

That is, a hood main body 1 fixed to a wall surface 7 so as to be located above the cooking utensil has a box-shaped fan casing installed in the center of the interior, and this fan casing 6 has suction holes 3 on the front and rear surfaces, and is in contact with the upper surface of the hood body 1 and communicates with the duct 8, and contains an electric motor 4 and a blade 6 capable of sucking on both sides. The filter receiver, which is provided close to the fan casing 6 so as to close the lower part thereof, is connected to the suction port 2, which is divided into the front side and the wall side of the hood body 1 by the plate 1o, and the suction port 2 on the front and rear sides of the fan casing 6. A filter 9 is provided in each ventilation path connecting the holes 3.

In the above configuration, when the electric motor 4 is operated, as the exhaust gas and oil smoke generated from the cooking appliance rise, they are drawn toward the wall surface 7 by the flow of indoor air. However, the filter receiver is located at the suction port 2 on the wall side, which is not blocked by the plate 10.
It flows into the hood main body 1, is sucked in by the blades 6 through the suction hole 3 on the rear surface of the fan casing 6, and is discharged outdoors through the duct 8. Also, part of the front side of the exhaust gas and oil smoke collides with the filter receiving plate 1o, but since the filter receiving port has suction ports 2 at the front and rear of the plate 10, and the blades 5 suck it in from both sides, as shown in FIG. Fiji letter receiver is board 1
Except for a small amount that collides with the side edge of the hood and leaks into the room from the side of the hood body 1, most of it flows into the hood body 1 and is discharged outdoors through the duct 8, so that exhaust gas and oil smoke are generated with a small air volume. can be reliably collected and discharged outdoors.

Next, an embodiment according to the second means of the present invention is shown in FIGS.
This will be explained based on FIG. In this embodiment, as shown in the figure, the quill letter receiver, which is a substantially rectangular flat plate in the embodiment of the first means, moves the plate 10 from the side surface of the hood main body 1, with the central portion protruding downward. The quill letter holder, which has been changed to an inverted triangular shape, is plate 11.

In the above configuration, in the embodiment of the first means, part of the exhaust gas and oil smoke that collided with the plate 10 is collected by the filter receiver at the tip of the lower part of the plate 11, and the flow is directed toward the front surface of the hood body 1. The inverted triangular filter receiver, which is divided into a suction port side and a wall suction port side, flows into the hood main body 1 along a portion corresponding to the oblique side of the plate 11 and is discharged from the duct 8. Therefore, the exhaust gas generated by cooking utensils,
As shown in Fig. 6, all the oil smoke flows into the hood body 1 and does not leak, making it possible to reliably collect exhaust gas and oil smoke and discharge it outdoors with an even smaller air volume than the first method. . In addition, in this implementation, the filter receiver is plate 1.
The shape of 1 was made into an inverted triangle, but the rising exhaust gas,
Any shape may be used as long as the flow of oil smoke is divided into the suction port side on the front surface of the hood body 1 and the suction port side on the wall surface.

Effects of the Invention According to the present invention, which is clear from the description of the embodiments above, a fan casing having suction holes at the front and rear is provided in the center of the hood body, and filters are provided on the front side and the wall side so that suction is taken in from both sides. The suction area of the buoy letter is large and the air flow resistance is low due to the reduced flow velocity. Exhaust gas and oil smoke can be reliably collected and discharged outdoors with a low air volume, and a range hood with low noise and little coal draft can be obtained.

In addition, by distributing the suction airflow after tiling using the filter receiving plate that protrudes downward and drawing it evenly into the two filters, ventilation resistance due to filter contamination is evened out.
Suction efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a range hood showing an embodiment of the first means of the present invention, FIG. 2 is a cross-sectional view showing the installation state of the range hood of the same embodiment and the flow of exhaust gas and oil smoke, and FIG. An explanatory diagram showing the flow of exhaust gas and oil smoke near the hood of the same embodiment, Fig. 4 is a sectional view of the range hood showing an embodiment of the second means, and Fig. 6 shows the installation state of the range hood of the same embodiment. FIG. 6 is an explanatory diagram showing the flow of exhaust gas and oil smoke near the hood of the same embodiment; FIG. 7 is a cross-sectional view of the range hood in the conventional embodiment; FIG. 8 9 is a sectional view showing the installation state of the range hood and the flow of exhaust gas and oil smoke, and FIG. 9 is an explanatory diagram showing the flow of exhaust gas and oil smoke near the hood. 1...Hood body, 2...Suction port, 3
...Suction hole, 4...Electric motor, 5...
...Blade, 6...Mountain/Fan casing, 9...
... Filter, 10.11 ... Filter receiving plate. Name of agent: Patent attorney Shigetaka Awano and 1 other person f-
-Two y pot body 2-=Sales port 3- Grade 8 Zen diagram Manniku Yuzu

Claims (2)

[Claims] (1) A hood body that is attached to the wall of the house so as to be located above the cooking utensil and has a suction port that opens on the bottom surface, and a box-shaped suction hole that is provided in the center of the hood body and has suction holes on the front and rear surfaces, The upper surface communicates with the outside through the hood body, and includes a fan casing with a built-in electric motor and blades, and two filters arranged in a ventilation path connecting the two suction holes of the fan casing and the suction port of the hood body. and,
A range hood comprising a filter receiving plate located below the fan casing and abutting and supporting a lower part of the filter. (2) The center part of the filter receiving plate is approximately V facing downwards.
The range hood according to claim 1, which has a protruding shape.