JPH084091Y2 - Filter for ventilation fan - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a grease filter using punching holes for a range hood.

[0002]

2. Description of the Related Art The grease filters used for the range hood and the like conventionally have the following drawbacks. a) The punching filter is the most cleanable filter, but in order to improve the oil collection efficiency, it is necessary to keep an eye on the fact that the ventilation resistance is increased to some extent and to reduce the opening ratio. The biggest drawback is that oil drops occur during use. b) The lath net type filter has been used for a long time together with punching and the oil collection efficiency is better than that of the punching type, but the cleanability is the worst and it is impossible to clean. high. c) A filter in which a metal thin plate is cut and raised to have slits is a filter that has recently begun to be used as a filter to replace punching. Cleanability is worse than punching because it has a cut-and-raised part. Oil collection efficiency is also better than conventional punching due to its balance with ventilation resistance. However, in this type of filter, dust in the air adheres to the oil collected in the slit part when the range hood is not used, and becomes grease-like, which causes the slit part that is the vent hole to be clogged. This clogging is a drawback that punching does not have.

[0003]

[Problems to be solved by the invention] The problem to be solved by the invention is to improve a punching filter having the best cleaning property. The problem to be solved by the present invention is to prevent the accumulation of this in this part.

[0004]

As a means for solving this problem, in the present invention, by providing a groove for oil recovery by press working in the vertical direction at the center of the punching hole, the punching hole part is formed. By collecting the oil in the oil recovery container one after another through the recovery groove, it is intended to eliminate the oil dripping, which has been the biggest drawback of the prior art.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings of the present invention, FIG.
Is a round hole bunching grease filter, FIG. 1B is a vertically long hole bunching grease filter, and FIG. 2 is an improved type of punching grease filter combining round holes and vertically long holes. A method of collecting oil in a grease filter using a punching hole, which is used in a suction part of a range hood for ventilation installed in a kitchen, will be described. When the range hood is operated during cooking, when air containing oil and steam generated during cooking is sucked and exhausted by the fan inside the range hood, it passes through the grease filter of the punching hole in the intake part of the range hood. At this time, at the punching hole portion, the surface tension causes oil contained in the passing air to accumulate at the hole portion. Without the conventional groove 3, if the amount of oil accumulated in the hole increases,
Some of them flow down the filter part, but most of them cause oil dripping trouble in the range part. In this case, in order to prevent oil dripping, it is effective if the groove 3 is provided so that excess oil can be quickly guided to the lower portion of the filter when oil starts to accumulate in the hole. It is optimal that the groove 3 has the central portion of the hole vertically as in the present invention.
It is meaningless to provide it at a position away from the hole portion. In the grease filter, the opening ratio and ventilation resistance of the hole are closely related to the oil collection efficiency in the hole portion, and if the opening ratio of the hole portion is increased, the ventilation resistance becomes low,
Oil collection efficiency is reduced. If the aperture ratio of the hole is reduced,
The ventilation resistance increases, but the oil collection efficiency increases. On the other hand, the present invention attempts to eliminate oil dripping, which is the biggest drawback of conventional punching filters, while at the same time maximizing the oil collection efficiency while maintaining low ventilation resistance. It is a thing. In order to prove this, a comparative measurement is actually performed, and the measurement data is used for explanation. For this measurement, a conventional punching filter having an opening ratio of 50% (hereinafter referred to as "A") and a filter having an oil recovery groove 3 provided in the central longitudinal direction of the punching hole 5 according to the present invention (hereinafter referred to as "B"). ) And a filter (hereinafter referred to as C) in which a metal thin plate is cut and raised to have slits are comparatively measured. The graph shown in FIG. 4 is a measurement of the ventilation resistance of a bunching filter with an opening ratio of 50%, and this ventilation resistance is exactly the same for both A and B. On the other hand, the graph shown in Fig. 5 is a measurement of the air flow resistance of C. Now, in the order of ABC, the measurement efficiency of oil is measured when the angle of each measurement filter is 11 degrees. Then, 1) In the case of the conventional punching type A, the oil collection efficiency due to the attachment of the filter is 15.8%, the oil collection efficiency of the oil collection container of the range hood is 5,0%, the total is 20.8%. There was oil dripping inside. ”2) In contrast, in the case of B of the present invention, the oil collection efficiency due to the attachment of the filter was 15%, and the oil collection rate of the oil collection container of the range hood was 15%. Total 30.2% “No oil dripping during measurement” 3) In case of cut-and-raised type C Oil collection efficiency due to adhesion of filter 17,4% Oil recovery rate of oil collection container of range hood 4,3% Total 21.7% “No oil dripping during measurement, cut a little As you can see from this, even if it is a punching filter with the same opening ratio of 50%, it is possible to measure it by providing the oil recovery groove 3 in the longitudinal direction of the center of the hole. The oil collected by the surface tension along the groove 3 in the punching hole portion,
It was observed that the oil was gradually collected along the groove 3 and was collected in the collection container, oil dripping was eliminated, and an increase in the oil collection efficiency as a whole was confirmed. Also, it has been recently used,
Compared to the C type filter, the one of the present invention is not clogged, has a good oil collecting efficiency, and has a good cleaning property. There are no injuries and can be said to be excellent. The condition for this measurement is that the mounting angle of the filter is 11 degrees, but if this is set to 45 degrees, the efficiency will be further increased, and if two filters are stacked, it will be more effective. Target.

[0006]

The effect of the invention is that the grease filter has a good cleaning property, no oil dripping, no clogging, a low ventilation resistance, and an excellent oil collecting efficiency.

[Brief description of drawings]

FIG. 1A is a partial view of a round hole punching grease filter of the present invention.

FIG. 1B is a partial view of a vertical hole punching grease filter of the present invention.

FIG. 2 is a partial view of a combination of a round hole and a vertically elongated hole of the present invention.

FIG. 3 is an enlarged view of a part of the present invention for clarifying the recovery groove part.

[Fig. 4] Ventilation resistance characteristics of a punching filter having an opening ratio of 50%.

[Fig. 5] Ventilation resistance characteristics of the type in which a thin metal plate is cut and raised.

[Explanation of symbols]

 1 Punching round hole 2 Gris filter 3 Oil recovery groove 4 Punching vertical elongated hole 5 Punching hole with a combination of round hole and vertical elongated hole

Claims (1)

[Scope of utility model registration request] 1. A grease filter 2 comprising a punching hole having a round hole 1 and a vertically elongated hole 4 and a punching hole 5 having a combination of a round hole and a vertically elongated hole, in which a central portion of each punching hole is vertically pressed. A ventilation fan filter provided with a groove 3 for collecting oil by processing.