JPH0452438A - Ventilating fan arrangement - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ventilation fan device installed in kitchens of food factories, restaurants, homes, etc. This invention relates to a ventilation fan device that can be removed efficiently and reduce the number of cleanings of the ventilation fan body, wind tunnel, etc.

[Prior art]

Traditionally, ventilation fan systems have been widely used in places where fine oil dust is generated, such as food factories, restaurants, and home kitchens. Of course, the oil dust scattered by the exhaust air also seriously pollutes the surrounding area. Therefore, it is necessary to increase the frequency of regular maintenance and cleaning, and since oil dust adhering to the equipment cannot be easily cleaned, maintenance of the equipment is extremely difficult. Recently, as a countermeasure to this problem, a filter made of thin non-woven fabric or fine metal net has been installed at the air inlet of the ventilation fan to catch relatively large oil droplets and prevent the equipment from becoming contaminated even a little. There are products on the market that are designed to reduce the frequency of cleaning.

However, ventilation fans equipped with non-woven fabric filters can only be used for one month at most before they need to be discarded and replaced. In the final stage, air resistance increases due to soiling of the nonwoven fabric, and ventilation capacity decreases dramatically. Furthermore, even if you have a ventilation fan with a fine metal net type filter, you will need to clean it at least once a month. In ventilation fan systems used in restaurants, food factories, etc., so-called eliminator types are also manufactured, in which metal drainboards are arranged alternately as filter members for large ventilation fans or ventilation tunnels. As with each type, it is necessary to remove and clean it once a month, and conventionally, all filter devices require frequent maintenance, and it is not easy to keep them clean all the time.

In addition to the above types, for example, JP-A-64-75836
There is a ventilation device disclosed in the publication.

This is a filter that is made of a thin stainless steel plate with punching holes placed on the air inlet side of the ventilation fan. This filter is configured as an endless belt, and the lower part of the belt is guided into an ultrasonic cleaning tank, and when the filter is detected to be clogged, the belt is rotated by a motor to clean the clogged portion. . Therefore, the filter can be cleaned simply by driving the motor, and there is no need to replace the filter. However, when using such a filter, as mentioned above, the ventilation capacity decreases if oil dust is to be captured reliably. If you want to increase ventilation capacity, you will inevitably have to make the air passage holes larger.
Oil dust trapping efficiency is drastically reduced. Furthermore, the filter cleaning solution requires special chemicals, which must also be replaced once a month.

[Problem to be solved by the invention]

It is an object of the present invention to reduce the cost of replacement parts and the labor required for cleaning due to frequent maintenance, which results from the use of existing products such as those mentioned above, and to reduce the cost of replacement parts and the labor required for cleaning, which result from the use of existing products such as those mentioned above, and to reduce the cost of replacing parts and the labor required for cleaning. To provide a ventilation device that keeps the air clean and at the same time prevents oil dust etc. from adhering to the device itself.

[Means to solve the problem]

Therefore, the present invention solves the above-mentioned problems, and its main structure is a ventilation fan device including an oil dust removal device on the air inflow side of a ventilation fan main body, in which the oil dust removal device controls the air flow path. Furthermore, the weir plate has a structure in which a water film is formed on the surface of the weir plate by water flowing from above to below, and furthermore, the weir plate has a porous structure. The oil dust removal device is provided with a water passage inside so that the water film is formed by water seeping from the inside of the weir plate, and the oil dust removal device is provided with a solenoid valve for water supply, so that water only flows when the ventilation fan is operated. It can also be configured to control

[For production]

When the ventilation fan is operated, a solenoid valve opens in conjunction with the ventilation fan, and water is supplied to the upper parts of the many weir plates of the oil and dust removal device. According to a preferred embodiment, the weir plate has a large number of small holes communicating from the inside to the surface, and the supplied water is once sent to the inside from the upper part of the weir plate, and then oozes from the inside to the surface. The water flows down from above to below, forming a thin film of water on the surface of the weir plate.

On the other hand, air containing oil and dust sucked in from the air inflow side of the ventilation fan device flows through the air flow path formed between the weir plates toward the ventilation fan body while repeatedly coming into contact with the surface of the weir plates.

During this flow, oil dust in the air comes into contact with the water film on the surface of the weir plate and is collected, regardless of the size of the oil droplets, and is discharged to the outside as the water flows down. Therefore, not only the ventilation fan itself but also the oil dust removal device can be kept clean at all times, and if the air flow path and the shape of the dam plate are made rational, oil and dust can be removed without reducing the air flow rate by the ventilation fan. The collection efficiency is increased.

〔Example〕

Hereinafter, typical embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view exposing the internal structure of a ventilation fan device according to an embodiment of the present invention, and FIG. 2 is an enlarged plan view of section A in FIG. 1.

In Fig. 1, reference numeral 1 denotes a weir plate that is folded in a zigzag shape and is made of a so-called porous structure with a large number of fine water holes, and is made of a plate with internal water passages. This is an oil dust removal device that has porous water passing plates arranged side by side with a slight gap between them.

This weir plate is a water-permeable porous plate made by point-bonding fine aluminum particles to each other at low temperatures, and the front and back surfaces and the walls of the internal water holes are coated with a hydrophilic substance such as ethyl silicate through secondary treatment. A thin coating of baking powder is applied to reduce the water flow resistance of the micropores, and at the same time, it is treated to form an even water film on the surface.

As this weir plate, it is also possible to use a porous ceramic plate or a porous synthetic resin plate other than the one shown in the drawings, and to replace it with one that has been subjected to a similar secondary treatment.

Reference numeral 2 denotes a water passageway leading from the upper surface of the weir plate 1 to the inside.

3 is a large number of weir plates 1. This is a header that holds the I----- in parallel and upright, and has a space inside to send water to each weir plate 1, 1-.

Reference numeral 4 designates a drainage tray for holding a large number of upright weir plates 1, 1, . Reference numeral 5 denotes left and right frame walls that support the header 3 and the drainage tray 4 and constitute the main body of the dust removal device.

Reference numeral 6 denotes a water supply pipe, and an electric circuit is constructed in the supply pipe 6 so that water is passed only during exhaustion in conjunction with the operation of the ventilation fan main body 9 by means of a solenoid valve 8. 10 indicates the inflow direction of air containing oil dust, and 11 indicates the outflow direction of clean exhaust gas.

FIG. 2 is an enlarged cross-sectional view of a bent portion of the weir plate 1 made of the microporous aluminum plate described above, and shows a state in which the inside of the water passage 2 is filled with water 12. In addition,
The arrows in the figure indicate the flow direction of water that oozes from the water passage 2 of the weir plate 1 to the surface of the weir plate 1 through minute pores.

According to the device of this embodiment, the dust that flows into the oil and dust removal device on the airflow due to the operation of the ventilation fan main body 9 cannot curve around the sharp bend of the labyrinth passage formed between the weir plates 1, 1, and The water hits the surfaces of the plates 1, 1 on which a water film is formed, and is adsorbed and collected by the water. Although the dust collection efficiency of this labyrinth passage is better than that of conventional filter types, it is not possible to trap light objects such as cigarette smoke with a size of less than 1 μm.

In this way, oil and dust captured by the water film on the weir plate surface are automatically discharged to the sewer as the water flows down, and the weir plate surface is always kept clean by fresh water seeping from inside.

Although the oil dust removal device of the illustrated embodiment uses a weir plate with a porous structure and internal passages, other systems may also be used in the present invention.

For example, a plate material with a hydrophilic weir plate surface may be used, and water may be allowed to flow on the outer surface to form a water film, and the shape of the weir plate may also be modified in various ways.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, almost no oil or dust adheres to the ventilation fan body or the wind tunnel portion, and the number of times the device is cleaned is far reduced compared to conventional products. Moreover, not only is oil and dust collected efficiently regardless of its size, but the air flow path inside the oil and dust removal device has an appropriate shape, so air flow is not reduced and ventilation is achieved. Efficiency is maintained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a ventilation fan device with automatic washing and dust removal device showing an embodiment of the present invention, and FIG. 2 is an enlarged plan view of FIG. 1. Explanation of main parts of the diagram 1---- (microporous) weir plate, 2- water passage, 3-
Header, 4- lower saucer, 5- left, right drive,
6-- Water supply pipe, 7- = Drain pipe, 8- Solenoid valve, 9-
Ventilation fan body, 12- Suido patent attorney Yoshihisa Nagai p-T-neeshi-new 1

Claims (3)

[Claims] (1) In a ventilation fan device equipped with an oil dust removal device on the air inflow side of the ventilation fan main body, the oil dust removal device has a large number of weir plate structures with air flow paths, and the surface of the weir plate is A ventilation fan device characterized in that a water film is formed by water flowing from above to below. (2) The ventilation fan device according to claim 1, wherein the weir plate has a porous structure and has a passageway therein, and the water film is formed by water exuding from the inside of the weir plate. (3) The ventilation fan device according to claim 1, wherein the oil dust removal device is provided with a water supply solenoid valve, and is controlled to flow water only when the ventilation fan is activated.