JPH08238441A - Air cleaning device - Google Patents

Abstract

PURPOSE: To make generated ozone harmless efficiently by installing an ultraviolet lamp of a specified main wavelength between a dust collection electrode plate and an activated carbon filter in an ionic wind air cleaner in which a discharge line, the dust collection electrode plate, the activated carbon filter are arranged in sequence in a dust. CONSTITUTION: In a duct, a prefilter 4, a discharge line, an ultraviolet lamp 9 of 253.7nm main wavelength, and an activated carbon filter are arranged in this order from an air inlet 1 to an air outlet 2. By arranging the ultraviolet lamp 9 between the dust collection electrode plate 6 and the activated carbon filter 7, one ozone molecule generated by corona discharge is dissociated into one oxygen radical and one oxygen atom by ultraviolet rays emitted from the ultraviolet lamp 9, and one oxygen radical reacts with one mole of ozone into two moles of oxygen atoms so that harmful ozone is decomposed efficiently. Residual ozone contacts activated carbon to be decomposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion wind air purifier which ionizes the air to be purified to improve the dust collection efficiency.

The basic structure of a dust collecting unit in a conventional ion wind air purifier of this type is that shown in FIG.

That is, this dust collecting unit is provided in a ventilation duct 3 having an intake port 1 and an exhaust port 2 from the intake port 1 toward the exhaust port 2, a prefilter 4, a discharge wire 5, a dust collecting electrode plate 6, The activated carbon filters 7 are arranged in this order, and a high voltage from a power source 8 is applied between the discharge wire 5 and the dust collecting electrode plate 6 so that the corona is discharged from the discharge wire 5 toward the dust collecting electrode plate 6. Discharge starts.

In this corona discharge field, gas molecules become positive ions and start moving toward the dust collecting electrode plate 6 to generate an ionic wind. When the air that is attracted by the ion wind and supplied into the duct 3 through the intake port 1 first passes through the prefilter 4, relatively large dust that cannot pass through the prefilter 4 is collected by the prefilter 4. The small dust that has passed through the prefilter 4 collides with positive ions in the corona discharge field, is positively charged, and is collected by the dust collecting electrode plate 6. When the dust-free air and ozone generated in the corona discharge field pass through the activated carbon filter 7, the odorous molecules of the air are physically adsorbed in the pores of the activated carbon, and the ozone is decomposed by contact with the activated carbon and cleaned. The converted air is exhausted from the exhaust port 2.

However, in such a conventional ionic air purifier, the purpose is to decompose ozone, which is harmful to the human body, by the activated carbon filter 7 to render it harmless. In order to increase the ozone decomposition efficiency, the structure (shape) of the activated carbon filter, which increases the contact area with ozone, is required. Therefore, the ventilation resistance of the activated carbon filter 7 increases and the wind velocity of the ionic wind decreases. There was a problem that a sufficient amount of cleaning air could not be obtained.

The present invention has been made by paying attention to such a conventional defect, and an ion wind air purifier which decomposes ozone generated by the ion wind air purifier by ultraviolet light to release harmless air. To provide.

That is, ozone is, as shown in FIG.
It is easy to absorb ultraviolet rays having a wavelength of 253.7 nm, and when ozone is absorbed by the ultraviolet rays, it is dissociated into radical oxygen and oxygen atoms (O ₂ ). The dissociated radical oxygen is 1
It reacts with moles of ozone (O ₃ ) to form 2 moles of oxygen atoms, and harmful ozone is efficiently decomposed. This ozone decomposition process is expressed by the following equation.

[0008]

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Therefore, by irradiating ozone with ultraviolet rays of 253.7 nm, it is possible to provide an ion wind type air purifier that is harmless and does not adversely affect the human body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiment shown in FIG. 3. The same parts as the structure of this embodiment and the structure described in the conventional example are designated by the reference numerals used in the conventional example. The structural description of the same structural parts will be omitted.

That is, in this embodiment, in the duct 3 connecting the intake port 1 and the exhaust port 2 from the intake port 1 toward the exhaust port 2, the prefilter 4, the discharge wire 5, the dust collecting electrode plate 6, An ultraviolet lamp 9 having a dominant wavelength of 253.7 nm,
The activated carbon filters 7 are arranged in this order. A lamp starting power source 10 is connected to the ultraviolet lamp 10.

As described above, the dust collecting electrode plate 6 and the activated carbon filter 7 are provided.
By disposing the ultraviolet lamp 9 between and, the ozone generated in the corona discharge field is dissociated into radical oxygen and oxygen atoms (O ₃ ) by the ultraviolet light having a wavelength of 253.7 nm emitted by the ultraviolet lamp 10. The dissociated radical oxygen reacts with 1 mol of ozone (O ₃ ) to become 2 mol of oxygen atoms, and harmful ozone is efficiently decomposed.

Ozone which has not been dissociated is activated carbon filter 7
When passing through, it contacts the activated carbon filter 7 and decomposes. Therefore, even if the ventilation resistance of the activated carbon filter 7 is lowered and the chance of contact with ozone is lower than that of the conventional example, sufficient ozone decomposition is possible, and the reduction of the wind speed of the ionic wind due to the ventilation resistance of the activated carbon filter 7 is minimized. Can be

As described above, in this embodiment, the ozone generated in the corona discharge field of the ion wind type air purifier is decomposed by the ultraviolet light emitted from the ultraviolet lamp 9, and the residual ozone is decomposed by the activated carbon filter 7. Because
The ventilation resistance of the activated carbon filter 7 can be reduced, and the reduction in the velocity of the ionic wind can be minimized.

As described above, according to the present invention, in the duct 3 which connects the intake port 1 and the exhaust port 2, the exhaust port 2 is exhausted from the intake port 1 to the exhaust port 2.
In the ion wind air purifier in which the discharge line 5, the dust collecting electrode plate 6, and the activated carbon filter 7 are sequentially arranged, the main wavelength between the dust collecting electrode plate and the activated carbon filter 7 is 253.7 nm.
Because it is an air purifier with the ultraviolet lamp of
According to this, the ozone generated in the corona discharge field in the ion wind air purifier duct is decomposed by ultraviolet light. Furthermore, the residual ozone that passed without receiving the ultraviolet light is
Since it is decomposed by the activated carbon filter, the air discharged from the exhaust port 2 is effectively rendered harmless.

Since the amount of residual ozone passing through the activated carbon filter is relatively small, the activated carbon filter 7 is used.
Even if the ventilation resistance is low, the residual ozone can be decomposed efficiently, so that an air purifier that does not reduce the velocity of the ionic wind can be obtained.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a conventional ion wind type air cleaner.

FIG. 2 is a characteristic diagram showing an ozone absorption spectrum.

FIG. 3 is a structural explanatory view showing an ion wind type air purifier according to an embodiment of the present invention.

[Explanation of symbols]

 1 ... Intake port 2 ... Exhaust port 3 ... Duct 4 ... Prefilter 5 ... Discharge wire 6 ... Dust collecting electrode plate 7 ... Activated carbon filter 8 ... Power supply 9 ... UV lamp 10 ... Power supply

Claims (1)

[Claims] 1. A duct (3) communicating between an intake port (1) and an exhaust port (2), the exhaust port (2) extending from the intake port (1).
In the ion air purifier in which the discharge line (5), the dust collecting electrode plate (6), and the activated carbon filter (7) are sequentially arranged, the main part between the dust collecting electrode plate and the activated carbon filter (7) An air purifier characterized by being provided with an ultraviolet lamp having a wavelength of 253.7 nm.