JPH0353980B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector that cleans the air by removing dust mixed in the air by electrostatic filtration.

Conventionally, this type of dust collector has either physically filtered the air by using a material with minute pores, such as glass wool, as a filter, or collected dust electrostatically, such as by generating static electricity. Electrostatic precipitators have been provided that filter air using the particle-attracting properties of static electricity.

However, in the former case, the dust collection performance varies depending on the material of the filter used, that is, the number and size of pores in the material, and therefore, in some cases, there is a drawback that ultrafine dust cannot be collected. In the latter case, the manufacturing cost is high because static electricity is generated by a high voltage generator, and the high voltage generator is dangerous to handle.

The present invention aims to provide a dust collector that can eliminate the above-mentioned drawbacks.

The device of the present invention will be explained below with reference to the drawings. Fig. 1 is a vertical side view showing an embodiment of the device of the present invention, and in the figure, 1 is an exterior frame, 2 is a fan as a flow means, and 3 is a drive fan 2. A motor serves as a driving unit, 4, 4 is a filtering mechanism, and 5 is an auxiliary filtration mechanism.

The exterior frame 1 has an air suction port 11 opened on one side facing the fan 2, and an air discharge port 12 on the other side facing the suction port 11.

That is, the dust collector of the present invention directs air to the first part of the outer frame 1.
The air is caused to flow from left to right in the figure by the fan 2, while passing through the filtration mechanisms 4 and 5, thereby filtering out particles, such as dust, mixed in the air.

In the embodiment, a filter 11' is provided on the side of the suction port 11, and the filter 11' may be a commonly used filter, for example, a mesh filter, and the fan 2 may be a cage-type fan. However, other means may be freely used, and the fan 2 may also be provided on the outlet 12 side.

FIG. 2 is a perspective view showing an embodiment of the filtration mechanisms 4, 4, in which 41 is a base, 42 is a filtration member,
43 is a charging promoter.

In the embodiment, the base 41 is provided on one side of the inner wall of the exterior frame 1 along the air flow direction,
For example, a metal plate or a resin plate may be used, but if an insulating porous synthetic resin plate, such as polyurethane foam, is used as the base 41, air can pass through the micropores in the polyurethane foam. There is an advantage that particles such as dust mixed in the air can be physically collected by collecting them within the polyurethane foam.

The above-mentioned polyurethane foam usually did not have sufficient filtration performance because the foam membrane remained in the product, but in recent years, polyurethane foams with only a three-dimensional skeleton structure have been provided by removing the foam membrane. An example of this type of tire is the product name "Everlight Scotto" (manufactured by Bridgestone Tire Co., Ltd.).

The filtering member 42 is made of a dielectric material such as polyethylene terephthalate, which is made by processing polyester into linear shapes, and is implanted inside the base 41 in a brush-like manner. be. The charging promoter 43 is disposed so as to face and abut against the tip of the filtering member 42, and the filtering member 4 is blown by air from the fan 2.
When the filter member 2 is swung, the tip of the filter member 42 is rubbed against the filter member 42, thereby generating frictional static electricity in the filter member 42. Therefore, it is preferable to use a high dielectric material such as polyester or ebonite molded into a cloth or plate shape as the charging promoter 43, thereby promoting electrostatic charging of the filter member 42. Great effect.

That is, the filtering member 42 is swung by the air blown by the fan 2, is charged with static electricity, and collects particles by attracting particles in the air, such as dust, passing through the exterior frame 1 using static electricity. Therefore, if the device of the present invention uses Everlight Scott as the base 41 as described above, the base 41 can physically collect dust, and the filter member 42 can also remove static electricity. Since it can collect dust effectively, it can be configured with a double structure.

Furthermore, when the filtering member 42 is charged and an electrostatic field is generated, it is thought that the base 41 is also charged due to electrostatic induction, so when Everlight Scott is used as the base 41, The base 41
Physical dust collection and electrostatic dust collection can be performed together.

Furthermore, since the filtration member 42 is charged with a large amount of static electricity at the tip that comes into contact with the charging accelerator 43, the tips of the linear portions of the filtration member 42 are each processed into a sharp shape, thereby further reducing static electricity. It can also be promoted.

In the embodiment, the filtration mechanism 4 is provided at two locations, but if used in a factory or the like where high dust collection performance is required, it may be provided at three or more locations. In some cases, only one location is sufficient. In the embodiment, the auxiliary filtration mechanism 5 is constituted by a metal mesh filter made by molding an electrically conductive metal material, such as copper, into a mesh shape. Base 4
1 and the charging promoter 43, respectively, conductive plates 41
a, 43a are provided as electrodes, and the filter member 42
When charged with a positive charge, the negative charge generated on the base 41 or the charging promoter 43 by electrostatic induction is applied to the auxiliary filtration mechanism 5 to charge it, thereby causing the positive charge to pass through the filtering member 42. There is an advantage that charged particles can be attracted to the auxiliary filtration mechanism 5.

In the above, the present invention apparatus can also be configured as follows.

As shown in FIG. 4, a pair of the base 41 and the filtering member 42 may be used to sandwich the charging promoter 43 so as to face each other, thereby reducing the static electricity of the filtering member 42. This has the advantage of increasing the amount generated and improving particle suction performance.

Further, as shown in FIGS. 5A and 5B, a movable means (not shown) is provided to rotate or reciprocate at least one of the base 41 and the charging promoter 43 to reduce the frictional static electricity of the filter member 42. It also has the advantage that charging can be promoted, thereby improving dust collection performance.

However, when adopting a configuration in which either of the above is rotated, it is desirable that the base 41 or the charging promoter 43 be formed into a circular shape as shown in FIG. 5B so that they can be easily rotated.

Furthermore, a power source may be attached to the filtration mechanism 4 to apply an electrostatic voltage to the base 41 and the charging accelerator 43 separately so that the polarities are different from each other. The electrostatic adsorption effect can be efficiently obtained using a low voltage power source.

Since the device of the present invention has the above configuration, the base 4
1, if a porous synthetic resin plate is used as described above, not only can the dust be physically collected by the base 41, but also the charging promoter 43 can be rubbed by the filter member 42, thereby removing dust from the filter member 42. Since the filter member 42 can be charged with static electricity and electrostatic dust collection can also be carried out, the dust collection performance is good.
Since the high voltage generator for charging can be omitted, the manufacturing cost is low and there is no danger.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an embodiment of the dust collector of the present invention, Fig. 2 is a perspective view of a filtration mechanism used in the above device, and Fig. 3 is a filtration mechanism used in the above device provided with a conductive plate. FIG. 4 is a perspective view showing another embodiment of the filtration mechanism used in the above device, and FIGS. 5A and 5B show still another embodiment of the filtration mechanism used in the above device. It is a schematic perspective view. In the figure, 1 is an exterior frame, 2 is a fan as a flow means, 3 is a motor as a drive unit, 4 is a filtration mechanism, 41 is a base, 42 is a filtration member, 43 is a charging promoter, and 5 is an auxiliary filtration mechanism. Show each.

Claims (1)

[Claims] 1. An exterior frame having an air suction port and an air discharge port;
A flow means for flowing air from the suction port to the discharge port, and at least one filtration mechanism for filtering the air sucked from the suction port, and the filtration mechanism includes the flow means for flowing air from the suction port to the discharge port; A base installed on the inner wall of the exterior frame, a large number of linear filter members installed on the base and charged with static electricity through friction, and a sliding friction member at the tip of the filter member. and a charging promoter disposed such that the filtering member is charged with static electricity by rubbing the filtering member against the charging promoter with flowing air, and the filtering member is charged with static electricity. A dust collector characterized by being configured to electrostatically adsorb mixed particles. 2. The dust collector according to claim 1, wherein the filter member has a sharp tip. 3. Claim 1, characterized in that one or both of the base and the charging promoter is provided with a movable means, thereby promoting electrostatic charging of the filtering member. dust collector. 4. An exterior frame having an air suction port and an air discharge port;
A flow means for flowing air from the suction port to the discharge port, and at least one filtration mechanism for filtering the air sucked from the suction port, and the filtration mechanism includes the flow means for flowing air from the suction port to the discharge port; A base that is placed on the inner wall of the exterior frame and that physically filters the air by collecting particles mixed in the air with a large number of micropores; A linear filtration member that charges static electricity by friction, and a charging accelerator disposed to be rubbed by the tip of the filtration member are provided, and the filtration member is charged with static electricity by flowing air. By rubbing against the promoter, the filter member is charged with static electricity,
A dust collector characterized in that the filter member is configured to electrostatically adsorb particles mixed in the air. 5. The dust collector according to claim 4, wherein the filter member has a sharp tip. 6. Claim 4, characterized in that one or both of the base and the charging promoter is provided with a movable means, thereby promoting electrostatic charging of the filtering member. dust collector.