JP2001087610A - Small-sized dustproof apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a small-sized high performance dustproof apparatus low in maintenance cost. SOLUTION: An outer cylinder 9 is provided around a cylinder 3 capable of being rotated at a high speed. Revolving motion is applied to dust-containing air by the cylinder 3 rotated at a high speed and heavy dust on which centrifugal force acts strongly is blown off in a centrifugal direction and only air low in the action of centrifugal force is sucked to be cleaned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof device for removing floating dust such as oil mist, dust, fibers, iron powder and the like in the air and supplying clean air to computers and other precision equipment.

[0002]

2. Description of the Related Art Filter dust collection, electric dust collection, cyclone dust collection and the like are generally used as conventional air cleaning techniques. Filter dust proofing is the simplest dust proofing device composed of a filter and a fan. However, if the filter is made finer and the dust collecting ability is improved, filter clogging occurs at an early stage, causing a problem. Electrostatic dust collection is possible by using the Coulomb force acting between the dust and the electrode under a high-voltage electric field, and it is possible to collect submicron dust. -Unsuitable for performance, cost and size. The cyclone dust collector has a relatively simple structure and a large processing air volume, but a small dust collector cannot increase the output of the fan motor in terms of cost, noise and storage, and its dust collection capacity is limited to about 20 μm, equivalent to iron powder. The problem is that even with the same diameter, light dust such as oil mist cannot provide a large dust collection force, and the adherence dust such as oil mist accumulates in a part of the flow path, creating resistance and reducing the rotational force of the dust. There is a problem that the performance is deteriorated at an early stage.

[0003]

In recent years, networking by computers has progressed in various industries, and the number of cases where precision equipment such as computers operate in a poor environment such as logistics, distribution, factories, kitchens, etc. has increased. The number of device failures caused by suspended dust such as dust and clothing fibers has increased and has become a major problem. In particular, in the environment of oil mist dust generated from fryers using edible oil, in workplaces where there is a lot of water vapor such as steelmaking, and in the dusty environment including automobile flue gas at truck terminals in the transportation industry, etc., airborne dust has a tendency to adhere and accumulate. In addition, there is no effective countermeasure for ordinary filter dust proof, electric dust collector, cyclone dust proof, etc., because problems such as clogging and flow path clogging occur and maintenance man-hours increase. In particular, oil mist with a diameter of φ20 μm or less has a low specific gravity, so it is difficult to remove it with a small inertial force and adheres to and accumulates with other dust. And its maintenance measures become a major problem.

As a specific example, a cyclone method or the like, which is a general dust collection method, is a method in which air containing dust sucked by a fan is guided to a rotational motion, and the dust is separated by centrifugal force. Since the sedimentation speed of the dust in the air increases substantially in proportion to the applied acceleration, the dust collecting ability is substantially proportional to “the magnitude of the centrifugal acceleration” × “the acceleration application time”. However, if the centrifugal acceleration and the application time are increased by the cyclone method to increase the dust collecting capability, a high suction force is required, so that the fan becomes large and the apparatus becomes large and expensive. In addition, since the centrifugal force is the largest immediately after the inflow of air, dust containing oil tends to accumulate at the inlet of the flow channel, causing a problem that the flow channel changes early and the dust collection performance deteriorates.

[0005]

Means for Solving the Problems The invention corresponding to claim 1 is as follows.
The air is cleaned by passing the mixed air of the oil and the dust toward the center from the outer peripheral side surface of the high-speed rotating cylinder. That is, the suction pressure of the fan acts on the inside of the cylinder rotating at a high speed, and always tries to suck air from the outer peripheral side toward the center. On the other hand, high-speed rotating flow is generated around the cylinder rotating at high speed and a large centrifugal force acts, so air with light mass passes through the hole on the side of the cylinder as it is. Also, the strong centrifugal force acting in opposition to the force cannot be passed through the hole on the side surface of the cylinder, and the outer peripheral portion rotates as it is. The air /
Dust separation (cleaning) is performed. In the present invention, the cylindrical portion has a structure capable of rotating at a high speed, and a high-speed and stable rotational motion of air is generated, and a large centrifugal force acts on the dust effectively for a long time, so that the dust collecting ability is improved.

According to a second aspect of the present invention, a blade for efficiently rotating and agitating dust-mixed air is provided in a high-speed rotating cylinder, and an opening for inflow of air into the side surface of the cylinder is provided.
Since the blades efficiently impart rotational motion to the air to generate a large centrifugal force, the air inlet opening can be made large and simple. As a result, a small dustproof device that does not require maintenance such as high dust collecting force and measures against clogging is realized.

According to a third aspect of the present invention, the outer peripheral portion of the cylinder which rotates at a high speed uses a general air-permeable material such as a paper filter or a sponge. A high-speed rotating airflow is generated on the outer periphery of the cylinder, and dust cannot pass through the air-permeable material on the side surface of the cylinder. In addition, the fine dust that tries to overcome the centrifugal acceleration and passes through it forms a complicated flow path, and due to the combined force of centrifugal force and Coriolis force acting inside the filter that rotates at high speed,
It is efficiently collected inside the breathable material.

The invention corresponding to claim 4 is a method for applying power to a high-speed rotating cylinder. In the sirocco type fan proposed in this embodiment, the rotating shaft is the same as the cylindrical portion, and it becomes possible to receive power directly from the fan drive motor, thereby reducing the size and cost of the dustproof device.

The invention corresponding to claim 5 relates to the maintainability of a cylindrical portion which rotates at a high speed. Easy attachment / detachment of cylindrical part
The maintainability is improved by adopting a replaceable structure.

[0010] According to a sixth aspect of the present invention, the kinetic energy of the high-speed rotating air generated around the high-speed rotating cylindrical portion is efficiently stored and the concentric position with the rotary cylindrical portion for efficiently collecting dust. A tube is provided.

[0011]

FIG. 1 shows an embodiment of the present invention. The cylinder (3) is provided with a bearing (7) on a rotating shaft and is capable of high-speed rotation, and has a hole (6) for air inflow in a part thereof,
Main blades (4) for efficiently rotating the dust-mixed air
Is provided. The rotor (5) has a vent (14) for guiding air passing through the inside of the cylinder (3) to the sirocco fan (8).
And is rotated directly by the fan motor (11), and the rotational force is transmitted to the cylinder (3) having the fitting structure by friction. Therefore, the cylinder (3) can be easily detached from the rotor (5). An outer cylinder (9) is provided on the outer circumference of the cylinder (3).
The dust that rotates at high speed adheres to the inner wall of the outer cylinder (9) due to its centrifugal force, or continues to rotate in the vicinity.

When the sirocco fan (8) rotates, the dust-mixed air flows in from the hole (13) provided in the cap (1) by its suction force, and the sub-blade (2) enters a high-speed rotation state. ), And thereafter the rotational force is increased by the main blades (3) on the side surfaces of the cylinder (3), and the outer periphery of the cylinder (3) is rotated at high speed. When the dust-mixed air obtains rotational force with the sub-blade (2), some of the adhering dust, such as oil mist,
The Coriolis force and centrifugal force act on the sub-blade (2) and collide with and adhere to the inner walls of the outer cylinder (4) to perform first-stage preliminary dust collection. When the dust-mixed air spirally descends to the hole (6) of the cylindrical part while rotating the inner wall of the outer cylinder (4) at high speed, a strong centrifugal force acts on the dust having a large mass and pushes the dust toward the wall surface of the outer cylinder (4). Because it is damaged, it cannot pass through the hole (6) provided in the cylinder (3) together with the air, and collides with and adheres to the inner wall of the outer cylinder (4) or the inner wall of the outer cylinder (4). Stay near and keep rotating. On the other hand, air that rotates in the same manner as dust has a small mass, and the suction force of the fan is larger than the centrifugal force that acts. Then, the air is blown out as clean air from the air outlet (15) of the sirocco fan (8) through the hole (14) of the rotor (5). Through these series of processes, separation of air and dust, that is, purification of air is performed.

FIG. 2 shows an example in which a sheet-like filter (9) woven into a pleated shape is arranged in a ring shape on the side surface of a cylindrical portion. High speed rotating sheet filter (9)
Since the outer folds efficiently rotate and stir the dust-mixed air, a high-speed rotating airflow is generated around the folds, and the air separated and purified by the centrifugal force passes through the fine pores of the sheet filter (9). It passes and is supplied from the fan. In this method, the filter itself rotates, so the centrifugal and Coriolis forces that occur when dust passes through the complex flow path inside the filter make the filter more efficient than when the filter is not rotating. Collection is possible. Also, in this method, dust of 5 μm or more can be preliminarily removed by centrifugal force separation by making the mesh of the sheet filter finer, and finer dust can be removed by the filter part. A dustproof device having both functions is realized.

FIG. 3 shows an example in which a gas permeable sponge (12) having a coarser filter than the filter is used on the side surface of the cylindrical rotating body. A porous material such as a sponge has a large surface unevenness and is sufficient to give a rotational motion to the dust-mixed air, and the centrifugal force applied to the dust when passing through the interior of the sponge (12) because the thickness can be increased. The time during which the force and Coriolis force act can be increased, and the dust collection force can be increased.

FIG. 4 shows an example in which the dustproof device (16) according to the present invention is applied to a dustproof device for a small computer. The computer main body (17) is entirely covered by a box (18) having no bottom and having a vent in part. An elastic air sealing material (20) is attached to a side wall surface of the box (18), and blocks air flow between the floor and the bottom surface of the box when crushed. Part of the box has a door (19)
Is provided, so that a floppy disk (FD), a compact (CD) or the like can be exchanged. The clean air of the dustproof device (16) is supplied into the box (18),
A part is taken into the computer main body, cools each part and is discharged from the fan of the computer itself, and then a part is discharged directly from the vent of the box (18) by the air supply pressure of the dustproof device. By a series of these mechanisms, the inside of the box (18) is always filled with fresh clean air and the internal temperature does not rise.

[Effect of the present invention]

In the present invention, since the magnitude of the centrifugal force of the rotating air and the operating time, which determine the dust collecting capacity, can be set according to the rotation speed, diameter, and length of the cylinder, respectively, various applications and requirements can be set. Therefore, a small and high dust collecting device can be realized at low cost. Also, in an environment containing a lot of oil mist, the conventional filter system, cyclone system, electric dust collection system, etc. quickly clogged and deteriorated in performance, and spent a lot of cost and time on maintenance,
According to the present invention, a large centrifugal acceleration is always applied to the rotating part, and even if dust or the like adheres and accumulates, the dust is blown out again in the outer peripheral direction and is collected later. Time performance is maintained. In particular, by making the outer cylinder where oil and dust adhere and accumulate, with a structure that absorbs oil or has an oil reservoir, a device that does not require maintenance for a long time can be realized, and a large cost reduction in operation is realized. I do.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment according to the present invention and a cylindrical portion.

FIG. 2 shows another embodiment of the present invention (a sectional view of a cylinder).

FIG. 3 shows another embodiment of the present invention (a sectional view of a cylinder).

FIG. 4 shows an embodiment in which the dustproof device according to the present invention is connected to a PC.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cap 2 ... Sub blade 3 ... Cylinder 4 ... Main blade 5 ... Rotor 6 ... Vent (cylindrical) 7 ... Bearing 8 ... Sirocco fan 9 ... Outer cylinder 10 ... Fan motor 11 ... Sheet filter 12 ... Breathable sponge DESCRIPTION OF SYMBOLS 13 ... Vent (cap) 14 ... Vent (rotor) 15 ... Outlet 16 ... Dustproof device 17 ... Small computer 18 ... Box 19 ... Opening / closing door 20 ... Elastic sealing material

Claims (6)

[Claims] 1. A small dust-proof device for protecting precision machinery, precision electronic equipment, etc. from oil droplets and dust, etc., wherein a hollow cylinder whose side is rotated by a permeable material, When the dust-mixed air passes through the high-speed rotating cylindrical side surface, the dust with large mass is blown outward by centrifugal force, and the air with small mass passes. A dustproof device characterized in that dust is separated from air by the following. 2. The dustproofing device according to claim 1, wherein the rotating cylindrical side surface has radially protruding blades for agitating and rotating the air, and a hole through which air flows from the outer surface of the cylindrical direction to the center axis of rotation. 3. The air-permeable material on the side of the cylinder is a porous sheet material,
2. The dustproof device according to claim 1, wherein the dustproof device is a paper filter or a sponge. 4. The dustproof device according to claim 1, wherein the rotational power of the cylinder is obtained directly from a fan drive motor. 5. The dustproof device according to claim 1, wherein the rotating cylinder is detachable and replaceable. 6. A cylinder having the same central axis as the cylinder is disposed around the rotating cylinder, and the kinetic energy of the dust-mixed air rotating on the outer periphery of the cylinder is efficiently stored, thereby reducing the motor rotational load and reducing the centrifugal force. 2. The dustproofing device according to claim 1, wherein dust collected on the inner wall of the cylinder is efficiently attached and collected.