JPH0459064A - Electrostatic precipitator - Google Patents

Abstract

PURPOSE:To obtain the electrostatic precipitator highly safe in handling by turning off the impressed voltage when an electrode set is taken out and providing a means for short-circuiting the voltage-impressed positive and negative electrode plates. CONSTITUTION:A cover 16 is lifted to discharge the dust deposited on the electrode when in use, and the electrode set 6 is pushed out by a pushing springs 18 and 19 in contact with the springs. A normally-open contact relay is consequently opened to turn off power source, and a contact spring 20 is simultaneously pressed on a box nut 3. A short circuit is formed by a positive electrode plate 1, the box nut 3, the contact spring 20, an insulating wire 21, the pushing spring 19, a supporting frame 4 and a negative electrode plate 2, and the electric charge accumulated in the dust collecting electrode in the precipitator and that of a capacitor in the circuit are instantaneously eliminated. Consequently, the electrostatic charge is instantaneously eliminated, and the user never receives an electric shock.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electrostatic precipitator, and particularly to an improvement in an electrostatic precipitator having a function of replacing a dust collection filter.

[Conventional technology]

FIG. 2 is an explanatory diagram showing an example of a conventional portable tabletop electrostatic precipitator.

In FIG. 2, a plurality of positive electrode plates 1- and a plurality of negative electrode plates 2
are arranged alternately facing each other across a gap I, and the positive electrode plate 1
is fixed to the support frame 4 by a pole l- (not shown), a nut 1 to (not shown), and a cap nut 3. At this time, the positive electrode plate 1 is structured to be electrically insulated from the support frame 4 and the negative electrode plate 2. Further, the negative electrode plate 2 is fixed in an electrically connected state to the support frame 4 by bolts (not shown) and nuts 1 to (not shown). The handle 5 is the support frame 4
If it is fixed with screws (not shown) etc., it will become one piece.
These constitute an electrode set 6.

Contact springs 7, 8 are connected to electrical insulator 10 by means of screws 9.
Fixed. One end of the spring 7 is connected to the positive electrode of a DC voltage power source (for example, 5000 V) by an insulated wire 11, and the other end is pressed into the bag neck 1 and connected to the positive electrode plate 1.
is connected to. Further, one end of the spring 8 is connected to the negative electrode of a DC voltage power source via an insulated wire 2, and the other end is pressed to the support frame 4 and connected to the negative electrode plate 2. Note that the broken lines of the springs 7 and 8 indicate the positions of the springs before compression.

The electrode set 6 is held by the handle 5 and pushed into a spacer (not shown) fixed to the insulating base 13 and housed in the case 14, and is supported by a cover 16 via an insulating cushion 15. . cover 16 splash 17
The insulating base 13 and the case 14 together form a container of the device.

In the device configured as described above, the springs 7 and 8
When a high DC voltage is applied between the electrode plates and the gas to be treated is passed between the electrode plates, the dust contained in the gas is charged and can be attracted and collected by the electrode plates.

The DC high voltage can be supplied by a well-known voltage doubler rectifier circuit using a combination of a rectifier element and a capacitor, a Kotscroft rectifier circuit, or the like.

Incidentally, related devices of this type include, for example, Utility Model Application Publication No. 1988-25788.

[Problems to be Solved by the Invention] In the above-mentioned prior art, when using the device, the electrode set 6
It is necessary to occasionally remove dust attached to the electrode assembly 6.
was removed from the device and cleaned.

At this time, in the circuit of the device, the charges accumulated in the electrodes that collect dust and the capacitors of the rectifier circuit remain accumulated even if the electricity is turned off, so if you touch them when removing the electrode set 6, I received an electric shock and had to wait for the charge to dissipate due to natural discharge and then take it out.

Furthermore, even if this device is equipped with an indicator light that indicates that it is operating, it is possible that the electrode assembly 6 may be pulled out with high voltage still applied without accidentally turning off the power switch. The conventional technology had problems because no consideration was given to handling and safety points.

An object of the present invention is to provide an electrostatic precipitator that is highly safe to handle.

[Means to solve the problem]

In order to achieve the above object, in the device of the present invention,
This device is equipped with a means to cut off the power to the device when taking out the electrode set, short-circuit the positive and negative electrode plates in conjunction with this, and eliminate the static charge accumulated in the circuit.

[Effect]

When the cover is removed to take out the electrode set from the device, the normally open contact relay is activated and the circuit is cut off.At the same time, the positive and negative electrode plates are short-circuited, so that the accumulated static charge disappears instantly. Therefore, it is safe even if the user accidentally tries to take out the electrode set without turning off the power, and since the static charge in the circuit disappears, there is no electric shock even if the user touches the electrodes.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In the configuration of the electrostatic precipitator of the present invention, a detailed explanation of the same parts as compared with the configuration of the conventional dust collector shown in FIG. 2 will be omitted. In FIG. 1, the same parts as those in the device in FIG. 2 are given the same reference numerals.

In FIG. 1, push springs 1, 8, and 19 are arranged on the left and right sides of an insulating base 13 at intervals, one end of the push spring 18 is connected to the negative pole of a DC high voltage power supply via an insulated wire 12, and The other end is pressed against the support frame 4 and the negative electrode plate 2
electrically connected to. Further, one end of the push spring 19 is electrically connected to a contact spring 20 via an insulated wire 21, and the push spring 19 itself is also pressed against the support frame 4 and electrically connected to the negative electrode plate 2. There is. The contact spring 20 is attached to the insulator 10 facing the cap nut 3 across the gap.

The normally open contact relay 22 has a mechanical opening/closing mechanism, such as a hinge roller lever type microswitch, which is connected in series to the power supply circuit so that the circuit is closed when the roller part of the lever is pressed against the support frame 4. used for.

As is well known in electrostatic precipitators, it is necessary to occasionally remove dust that adheres to the electrodes during use.

At that time, the order of removal is to first remove the cover 16.
The electrode set 6 is pushed out while being in contact with the springs 18, 19. In conjunction with this, the normally open contact relay opens and cuts off the power, and at the same time, the contact spring 2
0 is pressed against the bag neck l-3, and the positive electrode plate 122 bag neck 1-3. Contact spring 0. Insulated wire 21. Push spring 1
9. By forming a short circuit between the support frame 4 and the negative electrode plate 2, the electric charge stored in the electrode that collects dust in the device is removed.
and instantly eliminates the charge on the capacitor in the circuit.

The configuration of the present invention is not limited to the above-described embodiment; the push springs 18 and 19 may be coil springs, and the normally open contact relay 22 may be mounted at any position as long as the state of the electrode assembly 6 can be detected. For example, the normally open contact relay 2 is mounted on the upper back surface of the insulating base 13 and covered by the cover 16.
It may be configured such that when the lever roller portions 2 and 2 are brought into pressure contact and the cover 16 is removed, the normally open contact relay 22 is operated to cut off the power supply.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

When the cover is opened to take out the electrode set, the circuit is interrupted, so it is safe even if the user accidentally tries to take it out without turning off the power.

Furthermore, since the positive and negative electrodes are simultaneously short-circuited, the static charge in the circuit disappears, and the user will not receive an electric shock.

According to the electrostatic precipitator of the present invention, the effects described above can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an example of a conventional electrostatic precipitator.

Claims (1)

[Claims] 1. In an electrostatic precipitator in which a plurality of electrode plates to which positive and negative voltages are applied are arranged facing each other at a certain distance, and the electrode set with dust attached can be replaced, the applied voltage is applied when the electrode set is taken out. 1. A voltage dust collector comprising means for interrupting the voltage and short-circuiting the positive and negative electrode plates to which the voltage is applied.