JPS6178450A - Electrostatic air purifier - Google Patents

Abstract

PURPOSE:To inexpensively and certainly hold safety to an electrostatical shock due to residual charge, by providing a movable contact maker having the part always contacted with an acceleration electrode on the electrode in an earth potential side and displaced by a lid body. CONSTITUTION:In performing the washing of a dust collection part, the pressing force of a rib body 15 is lost by opening a lid body 4 and a movable contact maker 11 is contacted with acceleration electrodes 8 at the contact part 13 thereof by the energizing force of the leaf spring part 14 thereof. By this mechanism, because the charge remaining on the electrodes 8 is rapidly leaked to the earth side from the leaf spring part 14 through an opposed electrodes 7, no residual charge is present in the dust collection part.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a vacuum cleaner (purifier) having an electrostatic dust collection function and having an ionization section, which is used for general households, automatic city use, clean rooms, etc. be.

Structure of the conventional example and its problems FIG. 3 does not show the structure of the conventional example. 101 is a dust-containing air intake port 102. The main case is equipped with an exhaust port 103 and a rotatable lid 104 attached to the front side, and 105 is an ionization electrode made of a tungsten wire stretched over a frame ioe and connected to a power receiving part (not shown). , 10A, and 108 are a counter electrode and an accelerating electrode made of an aluminum plate or the like. A high voltage is applied by a high voltage power supply 109 between the ionization electrode 105 and the counter electrode 107 and between the counter electrode 107 and the acceleration electrode 10B, forming a high electric field in each.

In the above configuration, corona discharge occurs at the ionization electrode 105, and air molecules are ionized to generate ions. When these ions move along electric lines of force, they collide with a large number of neutral molecules, moving them and creating wind, while at the same time layering the dust in the air. And this charged dust is the opposite type 1i10
7 and the accelerating electrode 108 due to the electrostatic force between the counter electrode 10
Dust is collected on the A side.

The dust collecting section consisting of the counter electrode 107 and the accelerating electrode 108 needs to be cleaned from time to time to remove dust, so it is necessary to open the lid 104 and take out the dust collecting section from the main case 101. )is. At this time, there was a residual charge on the electrode to which the full t6 electric current was applied (accelerating electrode 108 in this example), which caused safety problems such as being hit by static electricity during operation. Conventionally, the electrode on the earth potential side was placed on the outermost side, and
A resistor was installed in series on the 09 side to leak the residual charge, but all of these had drawbacks such as insufficient safety and increased cost.

OBJECTS OF THE INVENTION The present invention safely secures the above-mentioned conventional problems and solves them with a simple structure and low cost.

Structure of the Invention The present invention provides for either the counter electrode or the accelerating electrode to be at ground potential, and this electrode to be placed on the outermost side, and to be in contact with the other adjacent electrode at all times, and to be connected to the main body case. A movable contact made of an electrical conductor is attached so that when the lid is closed, it is displaced by the lid to form a spatial distance that ensures electrical insulation.When the lid is opened, both electrodes are connected. When connected, the charge remaining on the high voltage application side is leaked to the ground side.

DESCRIPTION OF EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a main case, which is equipped with an intake port 2 for dust-containing air and an exhaust port 3 for clean air, and a lid body 4 is rotatably attached to the front side;
An ionization electrode made of tungsten wire or the like is fixed to the frame 6 via a power receiving part (171 not shown) and is held within the main case 1.

Reference numerals 7 and 8 denote a counter electrode and an accelerating electrode made of an aluminum plate or the like, each of which is integrally connected by a connecting rod or the like, and a space is provided between the counter electrode 7 and the accelerating electrode 8 to ensure electrical insulation. They are integrated at a distance and can be installed on the main case 1 or on the pig. A high voltage is applied between the ionization electrode 5 and the counter electrode γ and between the counter electrode and the acceleration electrode 8 by a high voltage power supply 10 to form a high electric field. Further, at this time, the counter electrode 7 is disposed at the outermost side and is at ground potential.

The side surface where the counter electrode 7 faces the lid 4 is shown in FIG.
A movable contact 11 made of a copper plate for spring use, a stainless plate for spring use, etc. as shown in ζ is rotatably mounted around a fulcrum 12. The movable contactor 11 is provided with a contact portion 13 at one end and a leaf spring portion 14 at the other end. 8 (indicated by a chain line in FIG. 1). When it is attached to the main case 1 and the lid 4 is closed, the rib 16 of the lid 4 pushes the movable contact 11 and displaces it, exposing the entire part to the outside of the counter electrode 7 and connecting it to the accelerating electrode 8. This is to ensure spatial distance.

In the above configuration, the wind raising and dust collection functions are performed based on the same operating principle as the conventional one, but when cleaning the dust collection section, the lid body 4 is first opened, so the rib body 1
5 disappears, and the contact portion 13 of the movable contact 11 comes into contact with the accelerating double positive electrode 8 due to the urging force of its own plate spring portion 14, and the electric charge remaining on the electrode 8 is immediately removed. Since the residual charge is caused to leak from the leaf spring section 14 through the entire counter electrode 7 to the ground side, the residual charge is eliminated from the dust collection section.

Further, in this embodiment, a configuration is shown in which the movable contactor 11 contacts the adjacent accelerating electrode 8 through the contact portion 13, but this is formed by extending the contact portion from the accelerating electrode 8 to the side surface of the counter electrode 7. The contact portion 13 may be in contact with this contact portion, and the point is that the contact portion 13 may be configured to have a portion always in contact with the electrode 8 on the earth potential side electrode, and to be able to be displaced by the lid body 4. .

In this embodiment, an example in which an ion wind is used as the wind source has been described, but it is clear that the same applies even when other wind sources such as a 5-motor fan are used.

Effects of the Invention The present invention has a small number of parts, has a simple configuration, can reliably maintain safety against static electricity caused by residual charge, and provides a low-cost, high-quality device. It is of great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an electrostatic air cleaner according to an embodiment of the present invention, FIG. 2 is a perspective view of a movable contact in the air cleaner, and FIG. 3 is a conventional electrostatic air cleaner. It is a side sectional view of an air cleaner. 1...Main case, 2...Intake port, 3...
...Exhaust port, 4...Lid, 5...Ionization electrode, 7...Counter electrode, 8...Acceleration electrode, 11...・Movable contact. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] A main case having an intake port and an exhaust port, an air blowing means and an ionization section provided within the main case, and an electrostatic precipitator comprising a counter electrode and an accelerating electrode that form a high electric field between them; It consists of a lid attached to the main case, and either the counter electrode or the accelerating electrode is placed on the outermost side with a ground potential, and the counter electrode and the accelerating electrode are normally electrically connected to this electrode. An electrostatic air cleaner comprising a movable contact that forms a spatial distance between both electrodes to ensure electrical insulation when the lid is closed.