JP3577443B2 - Indoor deodorizer - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air deodorizer that deodorizes the smell of tobacco and pets trapped in a room, or the odor at the time of defecation in a hospital room, and more particularly to an indoor deodorizer that uses ozone gas.
[0002]
[Prior art]
Various deodorizers using ozone for indoor deodorization have been conventionally provided. In conventional air deodorizers that use ozone, an activated carbon layer is placed downstream of the ozone generator (air outlet) to decompose and deodorize odors with ozone and prevent residual ozone from being released outside the equipment (indoors). It was arranged to treat residual ozone with activated carbon.
[0003]
[Problems to be solved by the invention]
However, with conventional deodorizers that capture and decompose residual ozone with activated carbon, all of the odor components in the air that are drawn in are deodorized with generated ozone, so that the ozone generator is required to have a large ozone generation capability. And the running cost is high.
[0004]
In addition, since the activated carbon in the activated carbon layer absorbs and reacts with the remaining ozone, there is a problem that the activated carbon is severely deteriorated and the maintenance interval becomes short.
[0005]
The present invention has been proposed in view of such a point, and can maintain a stable and high deodorizing effect over a long period of time while using a small capacity ozone generator, and is comfortable. It is an object of the present invention to provide an indoor deodorizer capable of maintaining a comfortable indoor environment.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a filter element such as a hepa (HEPA) filter or a ULPA (ULPA) filter and an activated carbon layer at an air suction port in a casing in which a blower is disposed. Arranged in order from the upstream in the flow direction, an ozone generator having a small capacity for deodorizing the airflow passing through the activated carbon layer is disposed in the casing on the downstream side in the flow direction of the airflow from the activated carbon layer, and the deodorized airflow is directly disposed. It has the characteristic of being discharged indoors .
[0007]
Effect of the Invention
In the present invention, since the ozone generator is arranged downstream of the activated carbon layer, only the odor component adsorbed and remaining on the activated carbon layer needs to be treated with ozone. Be able to make things smaller. The airflow discharged from the deodorizer contains a very small amount (for example, 0.1 ppm or less) of ozone, and the amount of ozone gas in the discharged airflow is determined by the amount of ozone generated by the ozone generator. By controlling the amount of air blow, the concentration can be limited to a predetermined concentration or less.
[0008]
In addition, since the airflow containing a small amount of ozone deodorized by the small-capacity ozone generator is configured to be directly discharged into the room, the room can be deodorized by the ozone released into the room, and the indoor air can be deodorized. Suspended bacteria can be sterilized. In addition, the airflow containing ozone returns to the deodorizer as circulating air, and the odor components accumulated in the activated carbon layer are decomposed by the ozone gas in the circulating air, reducing the accumulation of odor components in the activated carbon layer. Thus, the life of the activated carbon can be extended.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a schematic view showing an embodiment of the present invention, in which a hepa filter is provided from an upper side in an air flow direction to an air suction port (3) of a casing (2) in which a centrifugal blower (1) is disposed. (HEPA filter) (4) and activated carbon layer (5) are arranged in order. An ozone generator (7) is arranged in a space between the activated carbon layer (5) and the fan blade (6) of the centrifugal blower (1). Reference numeral (8) in the figure denotes a drive motor of the centrifugal blower (1).
[0010]
Further, in this deodorizer, the ozone generation amount of the ozone generator (7) and the centrifugal blower (1) are controlled by a command from an operation control device (not shown) according to the indoor odor detected by an odor sensor (not shown). ) The rotation speed is adjusted.
[0011]
In the deodorizer configured as described above, the indoor air taken into the casing (2) is trapped by the filter element while particles such as dust and pollen pass through the hepa filter (4), and then the activated carbon layer (5) The odor components are adsorbed and removed. The odor component permeating the activated carbon layer (5) is decomposed by contact with the ozone generated by the ozone generator (7), and is released from the casing (2) into the room. At this time, the amount of ozone generated by the ozone generator (7) or the amount of air blown by the blower (1) is controlled so that ozone having a concentration of about 0.1 ppm at maximum remains in the discharged air.
[0012]
By releasing such a small amount of ozone into the room, ozone can be deodorized in the room, and bacteria floating in the room can be sterilized. In addition, since the negative ions generated during the generation of ozone are also released into the room together with the exhaust air, a forest bathing effect due to the negative ions can be expected.
[0013]
Furthermore, during operation of the deodorizer, indoor air becomes circulating air and moves between the deodorizer and the room.However, since a small amount of ozone gas is mixed in the circulating air, the air is adsorbed by the activated carbon layer. The residual ozone gas in the circulating air acts on the odorous components, reacts with the odorous components to decompose the odorous components, and the ozone is also decomposed, thereby extending the life of the activated carbon. The ozone concentration in the discharged air does not increase.
[0014]
Incidentally, in the ammonia deodorization test in a box having an internal volume of 1 cubic meter, the elapsed time until the residual ratio of ammonia became 10% was 24 seconds. Further, in the test for deodorizing tobacco odor in a box having an internal volume of 1 cubic meter, the residual ratio became 0 every 135 seconds.
[0015]
In the above embodiment, the filter arranged on the most upstream side is constituted by a hepa filter, but this filter may be an urpa filter (ULPA filter). In the above embodiment, a centrifugal blower is used as the blower, but the blower may be an axial blower.
[0016]
【The invention's effect】
In the present invention, since the ozone generator for deodorizing the airflow passing through the activated carbon layer is disposed downstream of the activated carbon layer, only the odor component adsorbed and remaining in the activated carbon layer may be treated with ozone. Therefore, the ozone generator can have a small ozone generating ability.
[0017]
In addition, since the airflow containing a small amount of ozone deodorized by the small-capacity ozone generator is configured to be directly discharged into the room, the ozone contained in the airflow is released into the room. The room can be deodorized with the ozone, and bacteria floating in the room can be sterilized. Furthermore, the airflow containing ozone returns to the deodorizer as circulating wind, and the odor components accumulated in the activated carbon layer are decomposed by the ozone gas in the circulating air, reducing the accumulation of odor components in the activated carbon layer. Thus, the life of the activated carbon can be extended.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... blower, 2 ... casing, 3 ... air suction port of casing, 4 ... filter element, 5 ... activated carbon layer, 7 ... ozone generator (7).

Claims (2)

A filter element (4) and an activated carbon layer (5) are arranged in the air suction port (3) of a casing (2) in which a blower (1) is disposed inside from an upstream side in an air flow direction in order, and an activated carbon layer ( An ozone generator (7) having a small capacity for deodorizing an airflow passing through the activated carbon layer ( 5 ) is arranged in the casing (2) on the downstream side in the flow direction of the airflow from ( 5 ) , and the deodorized airflow is directly supplied. An indoor deodorizer that discharges indoors. The indoor deodorizer according to claim 1, wherein the filter element (4) is an element of a hepa filter or a urpa filter.

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