JPS5811339A - Ventilating fan - Google Patents

Abstract

PURPOSE:To obtain the structure of a filter capable of reducing the clogging thereof and durable to the usage of a long period of time by a method wherein the filter, collecting oily dust or the like contained in air and having the structure in which the direction of most of the constituting fibers are arranged so as to be vertical with respect to the flow of air, is provided in the ventilating fan. CONSTITUTION:A fan motor 2 is provided in the frame 1 of the ventilating fan and the filter 3 is fitted into a holding body 4 so as to cover the front opening of the fan motor. Synthetic fiber is employed as the fibrous body 6 utilized in this filter constituted so as to arrange much more fibers into Y direction, which is vertical direction with respect to the flow direction of the air, than X direction. The particles 7 of oil contained in the air are adhered to the fibrous body 6 when they are passing through this filter, glow gradually to bigger oil drops 8, dripped along the fibrous body 6 and are collected into an oil reservoir 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation fan, and relates to a ventilation fan used in a kitchen, a cooking area, etc., which is equipped with a filter for collecting oil smoke.

A fibrous filter is installed on the intake side of ventilation fans used in kitchens etc. to collect oil dust and reduce dirt on ventilation fans. There is a problem that the air volume gradually decreases when the blinds are large.

However, in conventional fibrous filters of this type, the fiber direction is random and has no directionality, and the intention to adopt such a filter is that it does not have directionality. The industry's customary handling of filters, which are considered to be excellent filter products, has been followed, and filter installation has continued without elucidating the unique considerations that accompany each product. It is based on

The present invention addresses these problems and focuses on a ventilation fan, which has a unique usage mode, to reduce clogging that progresses as oil dust is collected, and to enable the filter to be used for a long period of time. The purpose is to provide a ventilation fan with a filter structure.

A feature of the present invention is that in a ventilation fan equipped with a fibrous filter that collects atomized liquid contained in the air and collects it in droplets, the fibers of the fibrous filter are aligned in one direction. It's on the ventilation fan.

The details are as follows.

Filters attached to ventilation fans are generally installed on a vertical surface. Therefore, the oil smoke particles that hit the filter are collected by the fibers of the filter due to the shielding effect of the fibers. The collected oil particles are attached to the fibers, and as the particles adhere one after another, the air passage space is reduced and the amount of air passing through the fibers is reduced. Produces tsumashi and eyelids.

In addition, the dropping speed was slow, and therefore clogging occurred quickly. In the present invention, the fiber structure is changed from a random fiber structure to a fiber structure in which many fibers are arranged in the vertical direction, thereby increasing the oil dripping speed and reducing clogging.

Next, embodiments according to the present invention will be described based on the drawings.

First, FIG. 1 is a schematic cross-sectional view of a ventilation fan according to an embodiment of the present invention.

In the figure, 1 is the frame of the ventilation fan, 2 is the fan motor installed in the frame 1, and 3 is the filter, which is fitted into the filter holder 4 installed on the suction port side of the frame 1. There is. Further, reference numeral 5 denotes an oil reservoir, which is formed on the filter holder 4 and located below the filter 3, and is used to collect dripped oil collected on the filter 3.

Note that 7 indicates oil particles.

The above-mentioned filter 3 is formed of a fibrous aggregate, that is, a fibrous body, and FIG. 2 is a partially enlarged structural view of the filter 3, in which 6 shows the fibrous body and 8 shows oil droplets. .

The fiber body 6 is made of a synthetic resin made of a copolymer of acrylic and vinyl chloride, for example.
This fibrous filter is related to a nonwoven fabric, and is configured such that the direction of the fibrous body 6 in the filter 3 is carried at a higher rate in the Y direction (vertical direction) than in the illustrated X direction (horizontal direction). This is what is being done.

FIG. 3 shows a partially enlarged structure of the fibrous body 6 in a conventional filter for comparison, and the directions of the fibrous body 6 are the above-mentioned X direction (horizontal direction) and Y direction (vertical direction). It is composed of intertwined elements at the same rate.

Therefore, when air containing oil particles 7 generated in a kitchen or the like passes through the fan motor 2 and the filter 3, the oil particles 7 are absorbed by the fiber body 6 due to the shielding effect of the fiber body 6. adhere to.

The attached oil particles 7 adhere to each other and enlarge to form oil droplets 8, and when the gravity applied to the oil droplets 8 becomes larger than the adhesion force between the oil droplets 8 and the fiber body 5. The oil drips along the fiber body 6 and is eventually collected in the oil reservoir 5.

Here, in the device according to the present invention, as described above, the fiber direction of the fiber body 6 is configured to increase in the Y direction, which is the vertical direction.

Therefore, the oil droplet 8 quickly travels through the fibrous body 6 and easily drips.

In addition, as shown in Figure 4, which is an explanatory diagram of the arrangement when the ventilation fan shown in Figure 1 is installed in the kitchen, in the kitchen, oil smoke generated from a gas range is generally captured by the ventilation fan on the upward air current. , some of it goes up to the ceiling and is then captured by the ventilation fan.

At this time, the concentration of oil smoke is high at point A above the ventilation fan and point 0 below, and the concentration is low at point B and point D on the left and right sides.

Due to the rotation of the fan motor 2, the airflow sucked into the ventilation fan becomes a three-dimensional swirling flow at a certain speed (2), and a velocity component Vx in the rotational circumferential direction is generated.

The illustrated vertical fiber component 9 of the filter 3 has a shielding effect on the oil particles 7 included in the velocity component Vx at points A and 0, and has a shielding effect on the oil particles 7 included in the velocity component Vx at points B and D. It has little effect on shielding.

Moreover, the opposite effect exists for the horizontal fiber component 1o.

However, as described above, the concentration of the oil particles 7 is high at points A and 0 in the vertical direction, and the concentration is low at points B and D on the left and right, so the above embodiments according to the present invention As shown in the figure, by increasing the number of fibers in the fiber body 6 in the vertical direction (Y direction), more fine particles of oil smoke can be collected at the upper and lower points A and 0, improving the collection effect. It is something that can be done.

Therefore, according to the above, among the directional components of the fiber body 6 of the filter 3, the vertical direction (Y direction) is larger.
By arranging them in the same manner, the oil particles 7 adhering to the filter 3 can be quickly collected into the oil sump 5, and the collection effect can also be improved, making it easier to see than conventional ones. It can be used for a long period of time because there is less clumping and less reduction in air volume, and it has the effect of further reducing dirt inside the ventilation fan by improving the collection effect.

According to the experimental results, the product according to this example has a collection effect of 8 to 13% when operated under the same conditions for a certain period of time compared to the conventional product using a random composition.
An increase of 6 to 25 inches was confirmed in the recovery efficiency to the oil sump.

In addition to the above, according to the present invention, it is possible to reduce clogging that progresses as oil dust is collected,
This invention can be expected to provide a ventilation fan equipped with a filter structure that allows the use of a filter, and can be said to be an invention with excellent practical effects.

[Brief explanation of the drawing]

! @ Figure 1 is a schematic sectional view of a ventilation fan according to an embodiment of the present invention, Figure 2 is a partially enlarged structural diagram of the filter, Figure 3 is a partially enlarged structural diagram of a conventional filter, and Figure 4 is a partially enlarged structural diagram of a conventional filter. 1st
It is an explanatory diagram of the arrangement when the ventilation fan shown in the figure is installed in the kitchen. DESCRIPTION OF SYMBOLS 1... Frame body, 2... Fan motor, 3... Filter, 4... Filter holding body, 6... Fibrous body, 9
・・・Vertical direction 11 yen 1 Figure 2 Figure 3・``Genigo Figure 1--〒Draw

Claims (1)

[Claims] 1. A ventilation fan equipped with a fibrous filter that collects atomized liquid contained in the air and recovers it as droplets, characterized by having many fibers of the fibrous filter aligned in one direction. ventilation fan.