JPS63178813A - Filter for ventilating device - Google Patents

Abstract

PURPOSE:To improve the collecting efficiency of cooking soot and to reduce a pressure drop of providing a metal sheet having many small holes with cut bending at a specified interval and using openings, which are formed by the cut bending and holes, as ventilation path. CONSTITUTION:On a filter 1, the opening 4 is formed by providing with many small holes and further providing with cut bending 3. When an air contg. soot generated due to cooking is allowed to pass through the opening, large particle of oil is surely caught with the filter 1 by allowing the air stream to bend. As the ventilation path is composed of both cut bending 3 and small hole 2, the pressure drop is reduced and the noise of the ventilation fan is also reduced.

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 Ventilation devices such as ventilation fans and range hoods that exhaust oil smoke generated during cooking in the kitchen and prevent indoor air from becoming polluted are often heavily contaminated due to the oil smoke adhering to them.
Cleaning had to be done frequently. In addition, in order to save this cleaning effort, a filter is attached to the front of the ventilation system to collect oil smoke with two vanes to prevent the main body of the ventilation system from becoming dirty.
A method is used to clean only the filter.

Conventionally, in the case of a filter that uses inertial collision to collect oil smoke, as shown in FIGS. 6 to 8, a large number of raised cutouts 102 are provided in a thin metal plate 101 to create openings through which airflow passes. 1o3 was used as a ventilation passage, and the airflow Y was bent to collect oil smoke. This type of filter has a high oil smoke collection efficiency because the flow direction of the airflow Y is ensured by the glue 9, and the oil particles (dashed line arrows in the figure) collide and are collected by the inertia of the cut and raised parts 102. Met. Also, Figures 9 to 1
As shown in Figure 0, a large number of pores 106 were provided in a flat thin metal plate 105, and the pores 106 were used as ventilation channels to collect oil smoke by bending the air flow Z (the broken line arrows in the figure ). In this type of filter, the ventilation path is composed of a large number of pores 106, and the porosity can be increased, 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 10'I3h/ is provided with a large number of raised cuts 102, the openings 103 that serve as ventilation passages are formed by cutting and raising the thin metal plate 101. Therefore, the openings 103 cannot be made very large, and the closed pores 104 exist for strength reasons, and the porosity is relatively small, so the pressure loss of the filter is small and the filter does not pass through the filter. This was causing an increase in wind noise and noise due to increased load on ventilation equipment fans. In addition, if you try to increase the cut-and-raise height h by force in order to increase the pore area ratio, the substrate is likely to be distorted during manufacturing, and the effect of inertial collision will be reduced.
There was a problem that the oil smoke collection efficiency decreased. 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 coefficients, and the pressure loss can be lowered. In comparison, in this type of oil, if the number of pores is reduced and the porosity is lowered, the oil smoke collection efficiency improves, but there is a problem in that pressure loss increases.

The present invention takes these conventional problems into consideration and aims to provide a filter for ventilation equipment 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 thin metal plate having a large number of pores with 9 slits at predetermined intervals, and the slits formed by the slits and the pores. This is a filter for ventilation equipment that uses open holes as ventilation channels.

Effect With this configuration, air containing oily smoke generated during cooking passes through both the openings formed by cutting and raising and the pores provided on the thin metal plate as ventilation paths, but in this process, inertial balance is Due to the sudden action, the oil smoke is sufficiently collected on the metal sheet. In addition, since the porosity can be increased, pressure loss is low and noise can be kept low.

Embodiment 5: Hereinafter, an embodiment of the present invention will be explained based on FIGS. 1 to 3. In the figure, 1 is a filter with a plate thickness of 0.6 mm.
hole diameter ○*”mm in aluminum flat plate, hole spacing 1mm
In this example, a large number of pores 2 are provided with a porosity of 22.6%, and apertures 4 are formed by cutting and raising 3. The aperture 4 has a length of 15 mm in the lateral direction, and becomes an aperture 4 again after a closed hole 6'. Further, in the vertical direction, cut and raised grooves 3 are provided at intervals of 2.5 mm. And the height h of the cut-up is 1
．． 7 mm, and the opening 4 is extremely small when viewed from the front.

FIG. 4 shows a state in which this filter 1 is incorporated into a ventilation fan. Reference numeral 6 denotes a frame body of the ventilation fan body, which is equipped with a motor 7 and blades 8 rotated by the motor 7. Said blade 8
A filter 1 held by a filter frame 9 is disposed in front of the filter. 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 the air containing 6 pages/cm of pollutants generated during cooking is passed through the filter 1 and discharged to the outside. In the filter 1, the airflow X shown in FIGS. 2 and 3 is bent instead of going straight, so that large oil particles are reliably collected. In particular, in the filter 1 of the present invention, the openings 4 are installed at an angle with respect to the straight direction of the suction air flow The collection efficiency will be greatly improved. 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, so there is very little dirt on the main body of the ventilation fan, and the effort of cleaning can be saved.

Since the ventilation path is formed by both the cut and raised holes 3 and the pores 2, the pressure loss is low and the noise of the ventilation fan is low. Furthermore, since the pore size due to the pores 2 is not very large, there is no significant difference in oil smoke collection efficiency compared to a case without pores.

To 7/ Although this embodiment shows a case where a ventilation fan is used as the ventilation device, the same effect can be obtained even with a microwave oven.

Next, another embodiment of the present invention is shown in FIG.

In the filter 1' in the figure, a closed hole portion 5 formed between longitudinally adjacent cut and raised holes 5 faces an opening 4 located next to the cut and raised direction, and in this case as well, The operation is similar to that of the first embodiment.

Effects of the Invention As is clear from the description of the embodiments above, in the present invention, a filter to be incorporated into a ventilation system for discharging oily smoke generated during cooking etc. to the outside is made of a thin metal plate having a large number of pores. By providing cutouts at intervals and using the openings formed by the cutouts and the pores as ventilation passages, the air containing oil smoke is bent and passed through, so the oil smoke collection efficiency is high. Moreover, the effects of low pressure loss and low noise can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a ventilation filter according to an embodiment of the present invention, and FIG. 2 is a plan view of a filter for a ventilation system according to an embodiment of the present invention. 3 is a sectional view taken along line B-B' of the same, FIG. 4 is a sectional view of the twisted ventilation filter when the ventilation fan is installed, and FIG. 5 is according to another embodiment of the present invention. 6 is a plan view of a conventional ventilator filter, FIG. 7 is a sectional view taken along the line CC' in FIG. 6, and FIG. 9
The figure is a plan view of another conventional filter for ventilation equipment, No. 10.
The figure is a sectional view taken along the line E-E' in FIG. 1.1' filter, 2... pore, 3...
...Cut and raise, 4...Drill hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 6 Figure 9 MIO diagram

Claims (1)

[Claims] A filter for a ventilation system in which a thin metal plate having a large number of pores is cut and raised at predetermined intervals, and the openings formed by the cut and raised and the pores serve as ventilation passages.