JPH0416211A - Dust removing apparatus - Google Patents

Abstract

PURPOSE:To remove dust for a long duration without choking up a filter by installing a part to adsorb dust when the dust moves straight and collides against the part while using inertia mass of the dust in the bent part of an air flowing route. CONSTITUTION:When a fan 9 is rotated by the operation of a motor 10, an air flowing route winding zigzag is formed in an apparatus main body 1 and owing to the inertia mass of the dust, the dust contained in the air flow collides against filter elements 4, 4' and a part of the air flow runs through the filter elements 4, 4', and the rest of the air flow runs the winding air flow route, and then the air flows in a box body 6 of a record reproducing apparatus and is led in from the outlet 1b. During those processes, the dust is adsorbed in the filter elements 4, 4' and becoming clean, the air is led to the box body 6 from the outlet 1b and cools the prescribed component parts, and then flows out toward the air flowing out outlet.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dust removal device that captures dust from the air, and particularly to a dust removal device used in a recording/reproducing device such as an optical disk.

(Prior Art) As mentioned above, when recording and playing back optical discs, etc., the electric circuit boards and motors installed inside these recording and playback devices generate heat, so in order to avoid internal temperature rise, air must be pumped into the device. This is done to dissipate heat. However, as is well known, many optical systems such as lenses and prisms are exposed in this type of recording/reproducing device, so dust contained in the introduced cooling air may adhere to the optical systems. , which causes error signals to occur during recording and playback. Therefore, in the recording and reproducing apparatus, a filter is provided at the inlet of the air, and when the air passes through the filter, the dust in the air is captured by the element of the filter. In this case, as the filter element, a mesh-like element having a required number of mensches is used, or the filter element itself is charged and functions to electrostatically attract dust. As shown in FIG. 4, for example, a filter element 11 having a bellows-like structure is disposed in the filter device body 1 over the entire cross-sectional area of the air passage, and the blower frame 5 is provided with a bellows-shaped filter element 11. When the fan 9 inside is rotated, the air pressure is used to send air through the filter element 11 to a recording/reproducing device (not shown). This
The purpose of making the filter element 11 bellows-like is to increase the surface area and reduce the amount of air passing per unit area in order to reduce ventilation resistance.

(Intelligence B to be solved by the invention) However, in this type of dust removal device, the air flow is
Since the air always passes through the filter element, if the dust trapped on the filter element accumulates during this passage, it will cause clogging and increase ventilation resistance, which will adversely affect the cooling effect. For this reason, the filter element needs to be replaced periodically.

(Object of the Invention) The present invention was made based on the above circumstances, and focuses on the fact that when dust floating in the air is given a constant flow to the air, it tends to move straight due to its inertial mass. The present invention aims to provide a dust removal device that is free from clogging and can be used for a long period of time.

(Means for Solving the Problems) Therefore, in the present invention, in a dust removal device that captures dust from passing air, a portion that bends the air flow is provided in the air flow path, and the bent portion of the inner wall of
A member for capturing and adsorbing dust is provided at least at the location where the air collides with the air.

(Function) Therefore, a member that captures and adsorbs dust does not have to allow air to flow through it, and does not create resistance to air flow, so it does not add large resistance to air flow, as in the past. , there is no risk of clogging. However, when air collides with the member, dust can be reliably captured and adsorbed.

(Example) Hereinafter, an example of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes the main body of the dust removal device according to the present invention, which has a square frame shape. An inlet 1a opens at the front of this frame-like shape, and an outlet 1b opens at the center of the rear. The apparatus main body l is provided with a flow passage forming intermediate member 3 that divides the interior into two parts, front and rear, by attaching support arms Id extending radially from the central disc-shaped wall part 1c to the inside of the frame. There is. Particularly, in this embodiment, a motor 1 for the fan 9 is provided on the inlet side end surface of the intermediate member.
0 is attached, and the blade portion of the fan 9 generates an air flow within the device main body 1 from the inlet side to the outlet side. Between the intermediate member and the wall surface 1c of the main body 1 having the outlet 1b, there is formed a part where the air flow bends in a zigzag manner as shown by an arrow, and at least dust and dirt are present at the point where the air collides. A filter element 4 is attached to capture and adsorb. In this embodiment, a part of the wall surface lc is constituted by the filter element 4 and has air permeability. Furthermore, in this embodiment, at least the outer circumferential portion of the disc-shaped wall portion 1c of the intermediate member, and if necessary, the entirety thereof, can be made of the same material as the filter element 4. In this case, at the periphery of the wall portion 1c, there is a region 4' through which air circulates.

The dust removing device A having such a configuration is installed, for example, at the air inlet of the optical disc type recording and reproducing device body 6. A driving means 7, an optical disk drive 8, etc. are arranged within this image body 6, and it communicates with an air outlet on the opposite side.

In addition, in this example, the above filter elm) 4.4
' is made of a material that can be electrostatically attracted, and the knee can be energized with an electrostatic charge by an appropriate means.

Therefore, when the fan 9 is rotated by the drive of the motor 10, a zigzag winding air flow path is formed inside the device main body 1, and the dust contained in the air flow is transferred to the filter element 4.4' by its inertial mass. A part of the air flow passes through the filter element 4.4', and the other part directly flows through the bent air flow path and flows into the image body 6 of the recording/reproducing device, and the drive means, It passes through an optical disk drive and the like and is introduced from the exit 1b.

In this process, dust is adsorbed by the filter element 4.4', and the clean air enters the image body 6 from the outlet 1b, cools the required components, and flows out to the air outlet. be.

In the above embodiment, the filter element 4.4' is used as a member for adsorbing dust, but it may be simply placed on a wall and may be a component having an adsorption surface that adsorbs collided dust. Of course.

(Effects of the Invention) As described in detail above, the present invention utilizes the inertial mass of dust to provide a member at a bent part of the air flow path to attract dust when the dust travels straight and collides with the dust. Since dust can be removed without relying on circulation, there is no fear of clogging, dust can be removed for a long period of time, and the cooling effect of air can be maintained sufficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing an example of applying the dust removal device of the present invention to a recording/reproducing device, and FIG. 3 is the above-described embodiment of the present invention. FIG. 4 is a schematic side view of the conventional example.

Claims (1)

[Claims] In a dust removal device that captures dust from passing air, a portion that bends the air flow is provided in the air flow path, and dust is captured at least at a portion of the inner wall surface of the bending portion where the air collides with the air. A dust removal device characterized by being equipped with an adsorption member.