JP2006207908A - Indoor ventilating system and indoor ventilating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor ventilating system and an indoor ventilating method capable of keeping indoor environment in a good condition at all times by surely deodorizing the outside air taken indoors even in an environment having an odor emission source outdoors. <P>SOLUTION: This indoor ventilating device/method comprises a primary deodorizing means (step) implementing primary deodorization by releasing minus ions to the taken outside air, and a secondary deodorizing means (step) further implementing secondary deodorization by oxidizing an odor component in the outside air primarily deodorized by the primary deodorizing means (step). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an indoor ventilation system and an indoor ventilation method for ventilating a room after deodorizing the outside air taken into the room, especially when the outside air is taken into the room and ventilated in an environment where there is an odor generating source outside the room. About.

  Due to the recent increase in awareness of environmental issues, air discharged from buildings such as factories and various treatment facilities is generally discharged after deodorizing to reduce the impact on the surrounding environment. is there.

  Also, in restaurants and the like, polluted air is generated in which odor components such as kitchen odor and garbage odor generated from leftover rice and fine particles such as oil smoke and water vapor are mixed. The odor component of this polluted air often gives an unpleasant feeling to humans. Therefore, for example, in places close to residential areas such as condominiums and restaurants such as downtowns where restaurants are densely packed, odorous components of polluted air, including kitchen odors, are removed as consideration for neighboring residents and other restaurants. In many cases, the deodorized product is discharged outside.

  Conventionally known deodorizing methods include, for example, a method of decomposing and deodorizing odor components using a photocatalyst, a method of decomposing and deodorizing odor components using negative ions, and the like.

  For example, Japanese Patent Laid-Open No. 2001-336996 (Patent Document 1) relates to a ventilator for ventilating indoor air by ventilating it outdoors so that a part of the ventilated air is deodorized and purified to be recirculated indoors. As a deodorizing method in the ventilator, the method of deodorizing using a photocatalyst is described.

  Japanese Patent Laying-Open No. 2003-325651 (Patent Document 2) describes an air cleaner using a deodorizing method in which a negative ion cluster (negative ion) generator and an ultraviolet irradiation device are combined.

Furthermore, in Japanese Patent Application Laid-Open No. 2003-144969 (Patent Document 3), as an exhaust device having a dust collection and deodorization function, fine particles are collected by an electric dust collection means, and an odor component is further removed by a deodorization unit having a photocatalytic filter. A device for deodorization is described.
JP 2001-336996 A Japanese Patent Laid-Open No. 2003-325651 JP 2003-144969 A

  However, the methods described in Patent Documents 1 to 3 above are deodorization methods when exhausting air containing odors mainly generated indoors to the outside, or circulating indoors, for example, recycling facilities. In an environment where there is an odor generating source outside a living room or the like provided inside or inside a cleaning factory, no consideration is given from the viewpoint of deodorizing the air taken into the room. Therefore, in an environment where there is an odor source outside the room, such as a living room provided in a recycling facility or in a cleaning factory, the indoor environment is deteriorated because the odor cannot be taken into the room. There is.

  Therefore, the present invention provides an indoor ventilation system and an indoor ventilation method capable of reliably deodorizing the outside air taken into the room and keeping the indoor environment always good even in an environment where there is an odor source outside the room. The purpose is to do.

In order to solve the above problems, the present invention has the following features.
[1] An indoor ventilation system for taking outside air into a room and performing ventilation,
Primary deodorizing means for releasing negative ions into the outside air to be taken in to perform primary deodorization;
An indoor ventilation system comprising: secondary deodorizing means for performing secondary deodorization by further oxidizing the odor component in the outside air that has been primarily deodorized by the primary deodorizing means.
[2] In the above [1], a plurality of secondary deodorizing means are provided after the primary deodorizing means,
An indoor ventilation system comprising distribution means for distributing outside air deodorized by the primary deodorization means to the plurality of secondary deodorization means.
[3] In the above [1] or [2], the primary deodorizing means is constituted by a corona discharge generating device, and ozone generated by the corona discharge generating device between the corona discharge generating device and the secondary deodorizing means. An indoor ventilation system comprising an ozonolysis device for decomposing water.
[4] The room ventilation system according to any one of [1] to [3], wherein the secondary deodorizing means is constituted by a photocatalyst device.
[5] The room according to any one of [1] to [4], further comprising an air circulation unit that sucks indoor air and mixes the air with outside air supplied to the primary deodorizing unit. Ventilation system.
[6] An indoor ventilation method for taking outside air into a room and performing ventilation,
A primary deodorizing step for performing primary deodorization by releasing negative ions into the outside air to be taken in;
A room ventilation method comprising: a secondary deodorization step of performing secondary deodorization by further oxidizing an odor component in the outside air that has been primarily deodorized by the primary deodorization step.
[7] The indoor ventilation method according to [6], wherein the outside air after being deodorized in the primary deodorizing step is divided into a plurality of times, and the secondary deodorization is performed for each of the distributed outside air.
[8] In the above [6] or [7], the odor component in the outside air taken in by the corona discharge generator is oxidized and decomposed to perform primary deodorization. An indoor ventilation method comprising an ozone decomposing step for decomposing ozone generated by the corona discharge generator before secondary deodorizing in the secondary deodorizing step.
[9] The indoor ventilation method according to any one of the above [6] to [8], wherein the outside air after the primary deodorization is secondarily deodorized by the photocatalyst device.
[10] The room according to any one of [6] to [9], further comprising an air circulation step for sucking indoor air and mixing the air with outside air supplied to the primary deodorization step. Ventilation method.

  According to the present invention, there is provided an indoor ventilation system and an indoor ventilation method capable of reliably deodorizing the outside air taken into the room and keeping the indoor environment always good even in an environment where there is an odor source outside the room. Is done.

  Hereinafter, an example of the best mode of the present invention will be described.

  FIG. 1 is a schematic configuration diagram showing an example of a device configuration of an indoor ventilation system according to the present invention.

  The indoor ventilation system shown in FIG. 1 discharges negative ions into outside air to be taken in to perform primary deodorization means 1 for primary deodorization, and odor components in the outside air primarily deodorized by the primary deodorization means 1. Furthermore, it comprises secondary deodorizing means 2 for performing secondary deodorization by oxidation.

  In FIG. 1, outside air containing an odor component taken in from an outside air inlet 11 by a blower 10 is removed by an air filter 12 and then introduced into the primary deodorizing means 1. The odor component in the outside air introduced into the primary deodorizing means 1 is primarily deodorized by the negative ions released into the outside air. The outside air after the primary deodorization is further introduced into secondary deodorization means 2 that performs secondary deodorization by oxidizing and decomposing odor components in the primary deodorized outside air. The outside air introduced into the secondary deodorizing means 2 and subjected to the secondary deodorization is blown out into the room through an air outlet 20a provided in the living room 20.

  In FIG. 1, a plurality of, in this case, two secondary deodorizing means 2 are provided in the subsequent stage of one primary deodorizing means 1, but one secondary in the subsequent stage of one primary deodorizing means 1 is provided. It is good also as a structure which provides the deodorizing means 2. FIG. How many secondary deodorizing means 2 are provided after the primary deodorizing means 1 depends on the size of the living room, the concentration of odorous components contained in the outside air taken in, or the processing capacity of each deodorizing means. It can be set appropriately. Further, the number of the primary deodorizing means 1 installed is not limited to one.

  However, in general, it is considered that the deodorization efficiency is more improved when the secondary deodorization immediately before being introduced into the room is more complete. Therefore, a plurality of secondary deodorization means 2 are provided downstream of the single primary deodorization means 1. It is preferable in view of the device configuration to provide the above.

  In the case where a plurality of secondary deodorizing means 2 are provided at the subsequent stage of one primary deodorizing means 1, the outside air after deodorized by the primary deodorizing means 1 is distributed to the plurality of secondary deodorizing means 2. As the distribution means 3, for example, a branch air duct for guiding the outside air after the primary deodorization to the secondary deodorization means 2 according to the number of the secondary deodorization means 2 can be used.

  Further, as the primary deodorizing means 1, a corona discharge generator can be used. Active species (hereinafter referred to as “radicals”) that are chemically reactive by ionizing and dissociating some of the gas molecules in the outside air by generating corona discharge in the outside air containing the odor components taken in. Is generated. The generated radicals oxidize and decompose odor components in the outside air to perform primary deodorization.

  When corona discharge is generated in the outside air, ozone is generated. Although ozone has a strong oxidizing action, it is useful for decomposing odorous components, but for the protection of the global environment, it is preferable to treat even a small amount of ozone so that it is not released out of the system. Furthermore, when using a photocatalyst apparatus as a secondary deodorizing means described later, there is also a problem that ozone inhibits the oxidative decomposition reaction of the photocatalyst.

  For this reason, it is preferable to provide the ozone decomposition | disassembly apparatus 1a which decomposes | disassembles the ozone generated with the said corona discharge generator between the said corona discharge generator which is the primary deodorization means 1, and the secondary deodorization means 2. FIG.

  Here, as the ozone decomposing apparatus 1a, an apparatus for allowing ozone to pass through a honeycomb-shaped metal oxide catalyst and reducing and decomposing ozone there can be used. The ozone decomposing apparatus 1a also has the effect of promoting the secondary reaction of the odor component, and therefore has the effect of promoting the decomposition and removal of the odor component. The ozonolysis apparatus 1a may be provided adjacent to the rear side of the corona discharge generator as the primary deodorizing means 1 as shown in FIG. Since the pressure loss is large, in order to ensure the amount of air blown into the room, for example, a plurality of secondary deodorizing means 2 can be provided adjacent to the previous stage side.

As the secondary deodorizing means 2, a photocatalytic device can be used. Here, as the photocatalyst device, a device using a photocatalyst such as titanium oxide (TiO ₂ ) can be used. This deodorization method uses a photocatalytic reaction in which electrons and holes with extremely strong reducing power and oxidizing power are generated by irradiating a photocatalyst such as titanium oxide (TiO ₂ ) with light of a specific wavelength such as ultraviolet rays. Some will do. In particular, the holes generate radicals and promote oxidative decomposition of odor components.

  The photocatalyst device can be mainly composed of a photocatalyst filter carrying a photocatalyst and a light source such as an ultraviolet lamp for irradiating ultraviolet rays and the like, and by passing outside air containing odor components through the photocatalyst filter. Deodorization is performed. Note that a porous ceramic material or the like can be used as the photocatalytic filter supporting the photocatalyst.

  Here, the photocatalytic device that is the secondary deodorizing means 2 may be configured to provide one photocatalytic device on the rear stage side of the corona discharge generating device that is the primary deodorizing means 1, but as shown in FIG. It is preferable that a plurality of photocatalyst devices are provided immediately upstream of the air outlet 20a of the living room 20 on the rear side of one corona discharge generator.

  As a result, it is possible to efficiently deodorize the outside air blown into the living room 20 and to easily secure the flow rate of air supplied into the living room 20.

  With the above-described configuration, it is possible to reliably deodorize the outside air taken into the room and keep the indoor environment always good even in an environment where there is an odor source outside the room. Also, because it is configured to deodorize the outside air taken into the room, the indoor ventilation system is made more compact and the equipment costs are reduced compared to the method of deodorizing the exhaust from the recycling facility or the cleaning factory that is the source of the odor. In addition, the running cost can be greatly reduced.

As shown in FIG. 1, when the corona discharge generator 1, the ozone decomposition device 1a, and the photocatalyst device 2 are arranged from the upstream side with respect to the flow direction of the outside air, in order to perform deodorization effectively and efficiently. Are preferably operated under the following conditions in the respective devices.
B) Corona discharge generator 1
Wind: 1 to 10 m / sec Power load factor: 0.01~0.1WH / ^{m 3,} more preferably 0.03~0.07WH / ^{m 3}
B) Ozonizer 1a
Wind speed: 4 m / second or less Space velocity (SV): 200 to 500,000 / hour Here, the space velocity (SV) is the processing wind speed per hour passing through the ozonolysis apparatus by the catalyst capacity in the apparatus. It means what was divided.
C) Photocatalytic device 2
Wind speed: 1 m / second or less Space velocity (SV): 5000 / hour In the configuration shown in FIG. 1, the air in the living room 20 may be sucked and mixed with the outside air taken into the living room 20. Here, as a method of sucking the air in the living room 20 and mixing it with the outside air taken into the living room 20, for example, as shown by a dotted line in FIG. 1, air is supplied from an air suction port 25 provided in the living room 20. A method of connecting to the outside air intake duct on the upstream side of the air filter 12 through the circulation duct 26 can be used.

  By providing an air circulating means for sucking air in the living room and mixing the sucked air with the outside air supplied to the primary deodorizing means, the amount of outside air to be taken in can be reduced, and as a result, deodorizing treatment is performed. The concentration of odorous components contained in the outside air can be reduced, the processing load on each deodorizing means can be reduced, and a stable deodorizing treatment can be performed over a longer period.

It is a schematic block diagram which shows an example of the apparatus structure of the indoor ventilation system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Primary deodorizing means 1a Ozone decomposing device 2 Secondary deodorizing means 3 Distribution means 10 Blower 11 Outside air intake 12 Air filter 20 Living room 20a Air outlet 25 Air inlet 26 Air circulation duct

Claims (10)

An indoor ventilation system that takes outside air into the room and performs ventilation,
Primary deodorizing means for releasing negative ions into the outside air to be taken in to perform primary deodorization;
An indoor ventilation system comprising: secondary deodorizing means for performing secondary deodorization by further oxidizing the odor component in the outside air that has been primarily deodorized by the primary deodorizing means. A plurality of secondary deodorizing means are provided after the primary deodorizing means,
The indoor ventilation system according to claim 1, further comprising a distribution unit configured to distribute the outside air deodorized by the primary deodorizing unit to the plurality of secondary deodorizing units.   The primary deodorizing means is constituted by a corona discharge generating device, and an ozone decomposing device for decomposing ozone generated by the corona discharge generating device is provided between the corona discharge generating device and the secondary deodorizing means. The room ventilation system according to claim 1 or 2.   The indoor ventilation system according to any one of claims 1 to 3, wherein the secondary deodorizing means is constituted by a photocatalytic device.   The indoor ventilation system according to any one of claims 1 to 4, further comprising an air circulation means for sucking indoor air and mixing the air with outside air supplied to the primary deodorizing means. An indoor ventilation method for taking outside air into a room and performing ventilation,
A primary deodorizing step for performing primary deodorization by releasing negative ions into the outside air to be taken in;
A room ventilation method comprising: a secondary deodorization step of performing secondary deodorization by further oxidizing an odor component in the outside air that has been primarily deodorized by the primary deodorization step.   The room ventilation method according to claim 6, wherein the outside air after deodorized in the primary deodorizing step is distributed into a plurality of times, and the secondary deodorization is performed for each of the distributed outside air.   The odor components in the outside air taken in by the corona discharge generator are oxidatively decomposed to perform primary deodorization, and before the outside air subjected to primary deodorization by the corona discharge generator is secondarily deodorized in the secondary deodorization step, The room ventilation method according to claim 6 or 7, further comprising an ozonolysis step for decomposing ozone generated by the corona discharge generator.   The indoor ventilation method according to any one of claims 7 to 8, wherein the outside air after the primary deodorization is secondarily deodorized by the photocatalyst device.   The room ventilation method according to any one of claims 6 to 9, further comprising an air circulation step of sucking indoor air and mixing the air with outside air supplied to the primary deodorization step.

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