JPH01293114A - Filter for ventilation device - Google Patents

Abstract

PURPOSE:To improve the oil soot catching efficiency and to reduce the pressure loss and noise by providing louvered parts of bridge shape having openings working as ventilating passages in the both side of the louvered part in the surface direction of a plane plate, with a specified distance between each other on the plane plate. CONSTITUTION:Blades are revolve by a motor to discharge the air containing contaminants generated by cooking, etc., through filter 1 to the outside of a room. The air flow X flowing into the cut rising parts of bridge shape in the filter 1 is firstly collided against the louvered parts 3 and then divided into two flows of right and left and entered into the inner part of a ventilation fan through opening parts 4. Thus, by forming the opening parts 4 along the plane surface direction of the plane plate, the catching of oil soot is sufficiently carried out by the colliding action due to innertia, and the pressure loss and noise are reduced as the opening rate is large.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a filter used in ventilation devices such as ventilation fans and range hoods for exhausting oil smoke generated during cooking to the outside.

Conventional technology In general, ventilation devices such as ventilation fans and range hoods that exhaust oily smoke generated during cooking and prevent indoor air from becoming contaminated in the kitchen become heavily soiled due to the oily smoke that adheres to them, so they must be cleaned frequently. There was a need. Additionally, in order to save time on this cleaning, a filter is attached to the front of the ventilation system to collect the oily smoke, preventing the main body of the ventilation system from getting dirty, and cleaning only the filter. .

Conventionally, in the case of a filter that uses inertial collision to collect oil smoke, as shown in FIGS. The hole 103 was used as a ventilation passage, and the airflow Y was bent to collect oil smoke. In this type of filter, the flow direction of the airflow Y reliably changes, and the oil particles (dashed line arrows in the figure) collide with and are collected by the cut-up 102 due to inertia, so the oil smoke collection efficiency is high. there were. Also, Figures 9 to 1
As shown in FIG.
The pipe was bent to collect oil smoke (dashed arrow in the figure).

This type of filter has a ventilation passage consisting of a large number of 106 pores and can have a large porosity, so that the pressure loss of the filter can be kept low.

Problems to be Solved by the Invention In the conventional filter described above, in the type in which the thin metal plate 1o1 is provided with a large number of cut and raised holes 102, the openings 103 that serve as ventilation passages are cut and raised from the thin metal plate 101, so that Since the openings 103 cannot be made large, and the closed pores 104 exist for strength reasons, and the porosity is relatively small, the pressure loss of the filter is large, and wind noise when passing through the filter is generated. This was causing an increase in noise as the load on the ventilation system fan increased. In addition, if you try to forcefully increase the pore area and increase the height h of the cut-up, it will likely cause distortion of the substrate during counterfeiting, and the effect of inertial collision will decrease, reducing the oil smoke collection efficiency. It will drop.

In addition, in the case of a type in which a large number of pores 106 are provided in a flat metal thin film 105, the porosity can be increased to over 50%, reducing pressure loss, and when the pore size is large with the same porosity. The collection efficiency of oil smoke is higher than that of thin metal plate 101.
This is lower than the type with cut-and-raised holes 102, and if this type reduces the number of pores and lowers the porosity, the oil smoke collection efficiency will improve, but the pressure loss will increase. Put it away.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a filter for a ventilation system that has high oil smoke collection efficiency, low pressure loss, and low noise.

Means for Solving the Problem In order to solve this problem, the present invention provides a flat plate with a predetermined interval, openings are formed on both sides in the direction of the surface of the flat plate, and bridge-like cut-and-raised parts are provided, and the openings are This is a filter for a ventilation system that uses ventilation channels.

Effect With this configuration, air containing oil smoke generated during cooking passes through the opening formed by the bridge-shaped cut and raised part as a ventilation path, but since this opening is formed in the plane direction of the flat plate, inertial collision is prevented. Due to this action, oil smoke is sufficiently collected on the flat plate. In addition, since the porosity can be increased, pressure loss is low and noise can be kept low.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In the figure, 1 is a filter, plate thickness 0*51
11111 stainless steel flat plate, hole diameter 1a2M.

Six pores 2a are provided at a hole spacing of 1.710ffl, and openings 4 are formed on both sides of this portion in the direction of the plane of the flat plate, and a large number of cut and raised portions 3 are cut and raised in a bridge shape with a pitch of 17. Furthermore, a hole diameter of 1a 21011s and a hole interval of 1.7 m is provided on the plane part between the cut and raised parts 3 adjacent to the opening 4 side.
A flat punching portion 5 is provided in which a large number of pores 2b are formed continuously at m. The cut-and-raised portions 3 and the flat punched portions 6 are consecutively and alternately located. Since the cut and raised portion 3 is cut and raised by shearing, that is, since openings 4 are formed on both sides in the plane direction of the flat plate, the openings 4 are not visible when viewed from the front of the front part.

FIG. 6 shows a state in which this filter 1 is incorporated into a ventilation fan. Reference numeral 6 denotes a frame of the ventilation fan body, which is equipped with a motor and blades 8 rotated by the motor. In front of the blades 8 is a filter 1 held in a filter frame 9.
is installed. In the figure, 10 is an oil pan, 11 is a shutter, and 12 is a support member for the motor 7.

In the above configuration, the blades 8 are rotated by the motor 7, and air containing pollutants generated during cooking is passed through the filter 1 and discharged outside. filter 1
The airflow X that entered the bridge-shaped cut and raised portion 3 at
first collides with the cut and raised portion 3 at the front, then splits into left and right sides, and enters the inside of the ventilation fan through the opening 4. If this bridge-shaped cut-and-raised part 3 is conventionally cut and raised at one end, the opening will be visible when viewed from the front, and oil particles will enter the inside of the ventilation fan from the opening, but the bridge of this embodiment Since the shaped cut-and-raised portion 3 is sheared and raised, oil particles inevitably collide with the front cut-and-raised portion 3 due to inertia and are collected. Furthermore, oil particles contained in the air passing through the pores 2a and 2b are collected by the inertial collision effect because the diameter of the pores is as small as 1.2171 m.

Furthermore, since the openings created by cutting and raising are on both the left and right sides, the openings can be made larger than when cutting and raising only one side, and the pressure loss is reduced. Also, small oil particles are not collected and enter the inside of the ventilation fan along with the airflow, but the blades 8. There is little collision with the shutter 11, etc., and most of the air is discharged outside, and the dirt on the main body of the ventilation fan is extremely reduced, saving the effort of cleaning.

The ventilation path consists of the cut-and-raised portion 3 and the pores 2a.

2b, the pressure loss is low and the noise of the ventilation fan is low. In addition, since the pore size of the pores 2 is not large, there is no big difference in oil smoke collection efficiency compared to the case without pores.

In this embodiment, a ventilation fan is used as the ventilation device, but the same effect can be obtained with a range hood.

According to the present invention, as is clear from the description of the embodiments above,
A filter is installed in a ventilation system that exhausts oily smoke generated during cooking, etc., to the outside.The filter is installed on a flat plate at a predetermined interval, with openings formed in the direction of the plane of the flat plate on both sides, and bridge-shaped cut-and-raised parts. By making this opening a ventilation path, the air containing oil smoke is bent and passed through, so the oil smoke collection efficiency is high and the pressure loss is low.
The effect of reducing noise can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a ventilator filter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a cross-sectional view taken along line B-B' in FIG. Figure 4 shows CC' in Figure 1.
6 is a sectional view of a ventilation fan incorporating the filter for ventilation equipment, FIG. 6 is a plan view of a conventional filter for ventilation equipment, and FIG. 7 is a sectional view taken along c-c' of FIG. 6. FIG. 8 is a sectional view taken along the line DD' in FIG. 6, FIG. 9 is a plan view of another conventional ventilation filter, and FIG. 10 is a sectional view taken along the line K-E' in FIG. 9.
In the cross-sectional view, there is a filter, 3...
Cut and raised portion, 4...Opening. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1-7 CIL-9-Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Inner cylinder 9 Figure 10

Claims (2)

[Claims] (1) Openings are formed in the plane direction of the flat plate on both sides at predetermined intervals to provide bridge-shaped cut and raised parts,
A filter for a ventilation system in which the opening serves as a ventilation path. (2) The ventilator filter according to claim 1, which has a large number of small holes in either or both of the bridge-like cut-and-raised part and the flat part.