JPH0359739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improvements in air cleaners used in automobiles, homes, offices, and the like.

Conventional configuration and its problems Conventionally, air purifiers have typically installed a breathable conductor such as a wire mesh or metal honeycomb in front of the ionization electrode to prevent people from touching the high-pressure ionization electrode. Moreover, when the conductor is brought close to the ionizing electrode, a large current flows from the ionizing electrode to the breathable conductor, so it was common sense to keep the conductor away from the ionizing electrode until it is not affected by the current. That is, the voltage of the ionizing electrode,
The current flowing from the ionizing electrode to the counter electrode is determined by the distance between the ionizing electrode and the counter electrode, but if the voltage is 14.8 kV and the distance between the ionizing electrode and the counter electrode is 17 mm, the ionizing electrode and the breathable conductor in front of the ionizing electrode The relationship between the distance between the ionizing electrode and the current flowing from the ionizing electrode to the counter electrode is shown in Figure 2.
If it is 80mm or more, it will not affect the wind flow at all and no current will flow; however, if the distance is brought closer, the ion wind itself will no longer be generated, so generally there will be almost no current flowing from the ionizing electrode to the front ventilation conductor ( 1% or less).

On the other hand, one drawback of ion-air air purifiers is that when dust is collected on the counter electrode and stacked one after another, an abnormal discharge phenomenon occurs between the ionization electrode and the counter electrode, producing a large amount of ozone and making a wheezing sound. There was a problem that the counter electrode had to be cleaned and cleaned in a very short period of time.

OBJECTS OF THE INVENTION The present invention provides an air purifier that can extend the cleaning period by delaying the abnormal discharge phenomenon, that is, the generation of ozone and whistling noise, due to the dust collected on the counter electrode.

Structure of the Invention The air purifier of the present invention includes an ionization electrode, a breathable conductor in front of the ionization electrode, a counter electrode provided behind the ionization electrode parallel to the wind direction and parallel to the ionization electrode, and an ionization electrode and a counter electrode. A high voltage is applied between them to generate a corona discharge and induce an ion wind, and at the same time, the current flowing from the ionizing electrode to the breathable conductor is set to be 2% or more of the current flowing from the ionizing electrode to the counter electrode to remove dust, especially cotton dust. By forcibly collecting dust that adheres to the breathable conductor and not bringing it to the opposite electrode, the amount of dust that adheres to the opposite electrode is reduced, extending the period in which ozone is generated and wheezing noise is generated, and the cleaning period is greatly increased. This is a great extension.

DESCRIPTION OF EMBODIMENTS In FIG. 1, 1 is an ionization electrode, which is placed upwind of the counter electrode 2, so that a corona current flows when a high voltage is applied between the counter electrode 2 and the counter electrode 2. It is made of thin metal wire. The counter electrode 2 is a plate-shaped electrode arranged parallel to the wind direction. Reference numeral 3 denotes a second electrode which is disposed parallel to and opposite to the counter electrode 2 with its end face lowered downwind from the counter electrode 2, and a high voltage is applied between the second electrode and the counter electrode 2.
4 is a breathable conductor provided in front of the ionizing electrode 1 at right angles to the flow of air, and is grounded. 5,6
is a high voltage power supply that applies a high voltage to the ionization electrode 1, counter electrode 2, and second electrode 3. 7 is the intake port, 8
is an exhaust port, and 9 is a ventilation conductor provided at the exhaust port 8, which is grounded. 10 is an outer casing of the air purifier.

In the above configuration, the ionization electrode 1 and the counter electrode 2
When a high voltage is applied from the power source 5 during this period, corona discharge occurs from the ionizing electrode 1 to the counter electrode 2, and a current flows. At this time, ions flow from the ionizing electrode 1 toward the counter electrode 2, but these ions collide with air molecules and push the air toward the counter electrode.
It creates a flow of air, i.e. an ion wind. At the same time, the ions charge the dust in the air and reach the counter electrode 2, so the dust-laden air sucked in through the air intake port 7 collects cotton dust in the breathable conductor 4, and the counter electrode 2, most of the remaining dust is collected. Most of the current flowing from the ionization electrode 1 flows toward the counter electrode 2, but it varies depending on the distance between the ionization electrode 1 and the counter electrode 2, the distance between the ionization electrode 1 and the front permeable conductor 4, and the applied voltage. When the distance between the air-permeable conductor 4 and the air-permeable conductor 4 is brought closer, ions gradually increase toward the air-permeable conductor 4 as well.
In this case, the wind speed also gradually decreases due to the counter-electrode wind, so the current flowing through the breathable conductor 4 must be approximately 25% of the current flowing through the counter electrode 2. Furthermore, in the past, it was common to distance the breathable conductor 4 from the ionizing electrode 1 to the extent that no current flows toward the breathable conductor 4 (that is, 80 mm or more in FIG. 2), but the current flowing to the breathable conductor 4 By taking 2% or more of the current flowing to the dust collecting electrode 2, the air permeable conductor 4
Most of the dust can be attached to the body. In this case, the wind speed naturally decreases, but the ozone and wheezing noise caused by the abnormal discharge that occurred in a short period of time due to the cotton dust that was conventionally collected by the counter electrode 2 can be extended for a long time, reducing the cleaning period. It can be increased.

In addition, in FIG. 3, the counter electrode 2 is grounded, and the second electrode 3
In this case, some of the dust that was not collected by the breathable conductor is collected by the counter electrode 2, but the ions that carried the dust from the counter electrode 2 to the second electrode is pushed away and most of the dust is collected on the second electrode 3. For this reason, no dust is deposited on the tip 11 of the counter electrode 2, so that an abnormal discharge phenomenon hardly occurs between the ionization electrode 1 and the counter electrode 2.

In addition, by forming the breathable conductor with a honeycomb-like material that has a three-dimensional thickness, cotton dust can be attached to walls parallel to the direction of the wind, and the cotton dust can be collected three-dimensionally. Therefore, the pressure loss is small, and the period for cleaning cotton dust adhering to the breathable conductor 4 can be extended.

It goes without saying that this configuration can also be applied to an electrostatic precipitator that does not generate ion wind.

Effects of the Invention As is clear from the above embodiments, the present invention provides a breathable conductor in front of the ionizing electrode so that the current flowing from the ionizing electrode to the breathable conductor is 2% or more of the current flowing from the ionizing electrode to the counter electrode. Therefore, among the dust-containing air that enters from the intake port, fibrous dust with a light specific gravity such as cotton dust is collected by the breathable conductor, and the cotton dust does not adhere to the counter electrode, so the ionization electrode This makes it difficult for abnormal discharge to occur between the electrode and the opposing electrode, and the cleaning period for cleaning the electrode can be greatly extended.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an ionizing air purifier according to an embodiment of the present invention, Fig. 2 is a relational diagram showing the relationship between the distance between the ionizing electrode and the breathable conductor and the discharge current from the ionizing electrode, and Fig. 3 is a FIG. 3 is a sectional view of an ionic air purifier according to another embodiment of the present invention. 1...Ionization electrode, 2...Counter electrode, 3...
Second electrode, 4...Breathable conductor.

Claims (1)

[Scope of Claims] 1. A breathable conductor is provided in front of the ionization electrode, a counter electrode is provided behind the ionization electrode parallel to the wind direction and parallel to the ionization electrode, and a high voltage is applied between the ionization electrode and the counter electrode. In addition to generating a corona discharge and inducing an ion wind, the current flowing from the ionizing electrode to the breathable conductor by discharging it from the ionizing electrode to the breathable conductor is 2% or more of the current flowing from the ionizing electrode to the counter electrode. air purifier. 2. The air purifier according to claim 1, wherein the opposing electrodes are grounded and a negative high voltage is applied to the second electrodes arranged parallel to each other with the end faces of the electrodes lowered downwind from the opposing electrodes. . 3. The air purifier according to claim 1, wherein the breathable conductor is formed into a honeycomb shape.