JPH03146108A - Device for removing dust - Google Patents

Abstract

PURPOSE:To securely reduce number of cleanings and make maintenance costs lower by providing an air passage interconnecting an air inlet port and air outlet port in a casing and forming the air passage into a zigzag one having a plurality of turns. CONSTITUTION:A casing 1 provided with an air inlet port 2 and an air outlet port 3 is provided and a blower 6 for introducing the outside air into the casing 1 and for discharging the air to the outside therefrom is provided. And an air passage 4 interconnecting the inlet port 2 and the outlet port 3 is provided in the casing 1 in such a manner that the passage 4 is formed into a zigzag one having a plurality of turns. As a result, number of cleaning can be surely reduced, resulting thereby in lower maintenance costs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust removal device suitable for use in electronic devices such as scanners.

[Conventional technology]

For example, in optical electronic equipment such as a scanner device, image stability and light intensity are reduced due to dust adhering to the components of the equipment housing, so a dust removal device prevents dust from entering the equipment housing.

Conventionally, this type of dust removal device includes a housing having an air inlet and an air outlet, an air filter that traps dust in the air inlet of the housing, and an air filter provided downstream of the air filter. A device equipped with a fan that introduces outside air is used.

In the dust removal device configured in this manner, outside air is guided from the inside of the air introduction row housing to the air outlet by a fan. At this time, since dust in the outside air is captured by the air filter, clean air is blown out from the air outlet to the outside of the casing.

[Problem to be solved by the invention]

However, in conventional dust removal devices, air filters with a small mesh size are usually used, and as a result, the air filters become clogged after long-term use, reducing the removal ability and causing the air inside the housing to become clogged. It was making the flow worse.

As a result, there is a problem that the number of times of cleaning increases and the maintenance cost increases.

The present invention has been made in view of these circumstances, and therefore provides a dust removal device that can reliably reduce the number of times of cleaning, thereby reducing maintenance costs.

[Means to solve the problem]

The dust removal device according to the present invention includes an air flow path connecting an air inlet and an air outlet in a housing, and this air flow path is formed by a zigzag flow path that is bent many times.

[For production]

In the present invention, when the outside air passes through the air flow path in the housing, dust in the outside air is captured on the flow path wall surface due to flow path resistance.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the structure etc. of this invention will be explained in detail by the Example shown in the figure.

FIG. 1 is a sectional view showing a dust removal device according to the present invention, and FIG.
The figure is a perspective view showing an example of use of the dust removal device according to the present invention. In the same figure, the casing indicated by the symbol l has an air inlet 2 and an air outlet 3 that are open to the inside and outside, and an air flow path 4 that connects these re-introduction outlets 2 and 3 is provided inside. There is.

This air flow path 4 is connected to the inner surface of the housing 1 and the inclined partition plate 5.
It consists of upper and lower surfaces of a to 5d, and is entirely formed by a zigzag-shaped flow path that is bent many times. Further, the air flow path 4 is constituted by a flow path in which the cross-sectional area of the flow path changes at each location in the streamline direction, thereby imparting a change to the speed of the air flow. Note that the inclined partition plates 5a to 5
The material d is preferably a resin material because static electricity generated when dust passes through the air flow path 4 increases the amount of dust captured. Reference numeral 6 denotes a blower that introduces outside air into the housing and directs it out of the housing, and is provided around the opening of the air outlet 3. Reference numeral 7 denotes an air hose for supplying air, which is connected to the air outlet 3 and the air supply port of the electronic device housing 8.

In the dust removal device configured in this way, when the outside air passes through the air flow path 4 in the housing 1, the dust in the outside air is captured on the flow path wall surface 4a due to the flow path resistance. That is,
Dust passing through the air flow path 4 is removed from the inclined partition plates 53 to 5d.
They adhere to and become trapped on the upper surface of the housing 1 and the inner surface of the housing 1 (the shaded area indicated by the symbol A in FIG. 1).

Therefore, in this embodiment, since the amount of dust captured can be made sufficiently larger than when using an air filter, the number of times of cleaning can be reliably reduced.

In the present invention, it goes without saying that the greater the number of bends in the air flow path 4, the higher the dust removal effect.

〔Effect of the invention〕

As explained above, according to the present invention, an air flow path connecting the air inlet and the air outlet is provided in the housing, and this air flow path is formed by a zigzag flow path that is bent many times. When outside air passes through the air flow path within the housing, dust in the outside air is trapped on the flow path wall surface due to flow path resistance. Therefore, since the amount of dust captured can be made sufficiently larger than when using an air filter, the number of times of cleaning can be reliably reduced, and maintenance costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a dust removal device according to the present invention, and FIG.
The figure is a perspective view showing an example of use of the dust removal device according to the present invention. DESCRIPTION OF SYMBOLS 1...Housing, 2...Inlet, 3...Outlet, 4...Air flow path, 5a-5d...Slanted partition plate, 6...Blower.

Claims (1)

[Claims] In a dust removal device comprising a casing having an air inlet and an air outlet, and a blower for introducing outside air into the casing and drawing it out of the casing, the air inlet and the air outlet are provided in the casing. A dust removal device characterized in that a connecting air flow path is provided, and the air flow path is formed by a zigzag flow path that is bent many times.