JP2006239566A - Air cleaning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaning system enhancing dehumidification and efficiency of removing VOC. <P>SOLUTION: In the air cleaning system, a dehumidification mode and a VOC removal mode are switched alternately. In the dehumidification mode, an air blowing device 9 in a sending line 5 is directed so that air heated by a heating means 8 flows toward a moisture adsorbing rotor 7, and in the VOC removal mode, an air blowing device 10 in the sending line 5 is directed so that air heated by the heating means 8 flows toward a VOC adsorbing rotor 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an indoor air dehumidification system and an air purification system for removing indoor volatile organic compounds (formaldehyde, toluene, xylene, methyl acetate, ethyl acetate, etc., hereinafter referred to as VOC).

  Moisture builds up on the first floor of apartments and poorly ventilated rooms, and mold tends to occur. Moreover, in a house using new building materials, it is considered that VOCs gradually evaporate, causing health problems. Therefore, a removal system is proposed in Patent Documents 1 to 4.

  Patent Document 1 discloses a VOC and formaldehyde removal system in which an adsorption member made of activated carbon or the like is disposed downstream of a fan, and a decomposition member including a decomposition catalyst such as VOC is disposed downstream of the adsorption member. Yes.

  In Patent Document 2, a moisture exchange rotor is arranged on the upstream side of the VOC adsorption rotor, and air dehumidified by passing through the moisture exchange rotor is sent to the adsorption zone and the purge zone of the VOC adsorption rotor, and passes through the purge zone. A system is disclosed in which air is heated by a heater, the heated air is sent again to the desorption zone of the VOC adsorption rotor, and the VOC adsorbed by the VOC adsorption rotor is released.

  In Patent Document 3, a VOC adsorption rotor and a dehumidification rotor are arranged in parallel in a case, and VOC removal and moisture removal are performed independently by each rotor.

In Patent Document 4, a single tubular passage is divided into a supply path and a regeneration path by an axial partition plate, and an adsorption rotor is disposed in the tubular passage, and the suction rotor rotates to regenerate the supply path and the regeneration path. An air conditioning system that circulates between routes is disclosed. According to this air conditioning system, the air is purified by supplying finely crushed water molecules to the dehumidified air supplied into the air conditioning area.
JP 2002-035094 A JP 2002-102645 A JP 2002-191926 A JP 2002-286250 A

  The removal system disclosed in Patent Document 1 has a mechanism that adsorbs VOCs in the air with an adsorbing member, dissipates the adsorbed VOCs, contacts the decomposition member, and decomposes them. It is extremely inefficient because it is performed simultaneously. Further, the removal system disclosed in Patent Document 1 cannot remove moisture.

  In the removal system disclosed in Patent Document 2, the moisture adsorbed on the moisture exchange rotor is removed by sending the outside air into the regeneration zone of the moisture exchange rotor, but the outside air is fed as it is, so the temperature is low. Playback efficiency is poor. In addition, since the air to be processed fed into the desorption zone of the adsorption rotor is dehumidified, the VOC desorption effect is reduced.

  In the removal system disclosed in Patent Document 3, since the VOC adsorption rotor and the dehumidification rotor are arranged in parallel, dehumidification is performed even when no dehumidification is necessary, and VOC is removed even when no VOC is generated. There is no use for doing it. Furthermore, since a heater is provided for each rotor, the apparatus becomes large.

  The air conditioning system disclosed in Patent Document 4 does not remove moisture and VOC, and therefore there is no suggestion on how to efficiently remove moisture and VOC.

  In order to solve the above-described problem, an air purification system according to claim 1 includes a supply path that takes in indoor air containing moisture and VOC (volatile organic compounds) and returns the air from which moisture and VOC have been removed, and the moisture and A delivery path for discharging the VOC to the outside; a first blowing means for forming an air flow in the supply path; a second blowing means for forming an air flow in the delivery path; and the supply path by rotation. A water adsorbing unit and a VOC adsorbing unit that circulate between the water adsorbing unit and the delivery path, and a heating unit disposed between the water adsorbing unit and the VOC adsorbing unit in the delivery path. The dehumidification mode and the VOC removal mode are switched by reversing the air flow.

  An air purification system according to a third aspect includes an adsorption / desorption path in which a moisture adsorption unit and a VOC adsorption unit are arranged across a heating unit, a first path unit communicating with one side of the adsorption / desorption channel, The second path part is provided on the other side of the adsorption / desorption path, and the first path part and the air blowing means for forming an air flow in the second path part, and the first path part is the first path. The route can be switched indoors or outdoors by the switching unit, and the second route unit can be switched indoors or outdoors by the second route switching unit, the first route unit and the second route The dehumidification mode and the VOC removal mode were switched by reversing the air flow in the unit.

  In the dehumidifying mode, the air introduced into the delivery path is heated after passing through the VOC adsorption unit, and the moisture adsorbed by the moisture adsorption unit is removed as water vapor to regenerate the moisture adsorption unit. In the VOC removal mode, the air introduced into the delivery path is heated after passing through the moisture adsorption means, and the VOC adsorbed by the VOC adsorption means is desorbed and decomposed to regenerate the VOC adsorption means.

  When switching between the dehumidification mode and the VOC removal mode as described above, not only simply reverse the direction of the air flow, but also by providing a route switching means such as a damper in the delivery route, the introduction air can be either outside air or room air Or the air discharged from the delivery path can be switched to either indoors or outdoors.

  Further, as the moisture adsorbing means and the VOC adsorbing means, for example, a rotor type having a honeycomb structure capable of venting in the axial direction is preferable. The component (water or VOC) to be adsorbed can be specified by selecting the material of the adsorbing means. For example, as a moisture adsorption means, for example, a thing made of a hydrophilic adsorbent such as silica gel, activated alumina, hydrophilic zeolite or the like is used, and as a VOC adsorption means, a thing made of a hydrophobic adsorbent such as activated carbon, hydrophobic zeolite or the like is used. use.

According to the air purification system of the present invention, it is possible to easily switch between dehumidification and VOC removal. Therefore, optimum conditions can be set according to the difference in the environment of each house, the season or the weather.
Moreover, even if any mode of dehumidification and VOC removal is selected, only one heating means is required, so that the entire apparatus can be made compact. In order to efficiently perform dehumidification and VOC removal with a single heating means, it is preferable that the heating means be as close as possible to the moisture adsorption means and the VOC adsorption means.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a schematic view of a house to which an air purification system according to the present invention is applied, FIG. 2 is a configuration diagram showing a dehumidification mode state of the air purification system, and FIG. 3 is a configuration diagram showing a VOC removal mode state of the air purification system. 4 is a view as seen from the AA direction of FIG.

  In the embodiment shown in FIG. 1, the air purification system 1 is arranged behind the ceiling of a house. As shown in FIGS. 2 to 4, the air purification system 1 divides the inside of the tubular passage 2 into a supply path 4 and a delivery path 5 by an axial partition plate 3.

  The upstream side and the downstream side of the supply path 4 are connected to an inlet 4a and a clean air outlet 4b provided on the ceiling, respectively, the upstream side of the delivery path 5 is connected to an opening 5a formed on the roof, and the downstream side of the delivery path 5 is It is connected to the opening 5b formed in the roof.

  In the tubular passage 2, a VOC adsorption rotor 6 as a VOC adsorption means and a moisture adsorption rotor 7 as a moisture adsorption means are arranged downstream thereof. Both the VOC adsorption rotor 6 and the moisture adsorption rotor 7 are rotatable in a plane perpendicular to the flow path of the tubular passage with the shafts 6 a and 7 a being in the same plane as the partition plate 3. When the VOC adsorption rotor 6 and the moisture adsorption rotor 7 rotate in the tubular passage 2, each part of the rotor circulates between the supply path 4 and the delivery path 5.

  Further, heating means 8 is disposed between the VOC adsorption rotor 6 and the moisture adsorption rotor 7 in the delivery path 5, and air blowers 9 and 10 such as fans are disposed in the supply path 4 and the delivery path 5. ing. In this embodiment, the direction of the blower 10 provided in the delivery path 5 can be reversed by 180 °, thereby switching the dehumidification mode and the VOC removal mode by reversing the air flow in the delivery path 5. It is said. Hereinafter, the dehumidifying mode and the VOC removing mode will be described.

(Dehumidification mode)
As shown in FIG. 2, in the dehumidifying mode, the air heated by the heating means 8 is directed toward the moisture adsorption rotor 7 in the direction of the blower 9 in the delivery path 5.
In this mode, the VOC in the indoor air introduced into the supply path 4 is adsorbed by the VOC adsorption rotor 6, but even if this adsorbed part is positioned in the delivery path 5 as the rotor rotates, In the delivery path 5, the VOC is not effectively desorbed and decomposed simply by being exposed to the outside air.
On the other hand, the moisture in the room air introduced into the supply path 4 is adsorbed by the moisture adsorption rotor 7, and when the adsorbed portion reaches the delivery path 5 by the rotation of the moisture adsorption rotor 7, the heating means 8 causes the high temperature. The outside air thus formed comes into contact with the portion where the moisture is adsorbed and removed as water vapor, and the moisture adsorption rotor 7 is regenerated.

  Thus, since VOC is not actively removed in the dehumidifying mode, it is effective when the VOC concentration in the room air is low or when the humidity is particularly high.

(VOC removal mode)
As shown in FIG. 3, in the VOC removal mode, the direction of the blower 9 in the delivery path 5 is opposite to that in the dehumidification mode so that the air heated by the heating means 8 is directed to the VOC adsorption rotor 6.
In this mode, the moisture in the room air introduced into the supply path 4 is adsorbed by the moisture adsorption rotor 7, but even if this adsorbed portion is positioned in the delivery path 5 as the rotor rotates, Since the outside air is merely hit in the delivery path 5, the moisture does not evaporate as compared with the case where the heated air comes into contact. However, since the heat of the heating means 8 also acts on the moisture adsorption rotor 7, it does not completely evaporate but evaporates in a considerable amount, and this vapor is sent to the VOC adsorption rotor 6.

  On the other hand, the VOC in the indoor air introduced into the supply path 4 is adsorbed by the VOC adsorption rotor 6, and when this adsorbed portion reaches the delivery path 5 by the rotation of the VOC adsorption rotor 6, the heating means 8 causes a high temperature. The outside air thus formed comes into contact with the portion where the VOC is adsorbed and is removed by desorption and decomposition, and the VOC adsorption rotor 6 is regenerated.

  In the VOC removal mode described above, since the outside air containing water vapor to some extent is introduced into the VOC adsorption rotor 6, it is possible to remove VOC more efficiently than in a conventional air purification system.

  5 is a view similar to FIG. 1 showing another embodiment, FIG. 6 is a block diagram showing a dehumidification mode state of the air purification system shown in FIG. 5, and FIG. 7 is a VOC removal mode of the air purification system shown in FIG. FIG. 8 is a flow chart of the air purification system shown in FIG.

  In the embodiment shown in FIG. 5, the air purification system 1 is disposed under the floor. In the case of this embodiment, the intake port 4a to the supply path 4 and the exhaust port 4b from the supply path 4 are opened on the floor, and openings 5a and 5b connected to the delivery path 5 are formed on the base of the house. A damper 11 and a damper 12 are provided in the middle of the delivery path 5 leading to the openings 5a and 5b so as to switch between an outdoor path and an indoor path.

  An example of the operation of the air purification system 1 having the above configuration will be described with reference to FIG. In this operation example, dehumidification and VOC removal are performed during a predetermined time.

  First, turn on the power and set the timer. Then, the damper 11 is opened and the damper 12 is closed. This state is the dehumidifying mode shown in FIG. And the air blowers 9 and 10 are driven, and air flows through the supply path 4 and the delivery path 5 in the forward direction (from left to right in the figure).

  In this dehumidification mode, the VOC in the indoor air introduced into the supply path 4 is adsorbed by the VOC adsorption rotor 6, but the VOC is not effectively desorbed and decomposed in the delivery path 5. Also, the moisture in the indoor air introduced into the supply path 4 is adsorbed by the moisture adsorption rotor 7, and when this adsorbed portion enters the delivery path 5 by the rotation of the moisture adsorption rotor 7, the heating means 8 causes a high temperature. The outside air thus formed comes into contact with the portion where the moisture is adsorbed to remove the moisture as water vapor, and the moisture adsorption rotor 7 is regenerated. And the air containing water vapor | steam is discharged | emitted outdoors.

  After repeating the above dehumidifying mode for a predetermined time, the blower 9 is temporarily stopped, the damper 11 is closed, and the damper 12 is opened. This state is the VOC removal mode shown in FIG. Then, the blower 9 is driven in the reverse direction, and air flows in the reverse direction (right to left in the figure) in the delivery path 5. In addition, since the air blower 10 is driven continuously, air continuously flows through the supply path 4 in the forward direction.

  In this VOC removal mode, the moisture in the room air introduced into the supply path 4 is adsorbed by the moisture adsorption rotor 7, and the heat of the heating means 8 also acts on the moisture adsorption rotor 7, so that a considerable amount of water vapor is generated. The water vapor is sent to the VOC adsorption rotor 6. On the other hand, the VOC in the indoor air introduced into the supply path 4 is adsorbed by the VOC adsorption rotor 6, and when this adsorbed portion enters the delivery path 5 by the rotation of the VOC adsorption rotor 6, the heating means 8 causes a high temperature. The outside air thus formed comes into contact with the portion where the VOC is adsorbed and is removed by desorption and decomposition, and the VOC adsorption rotor 6 is regenerated. Moreover, the air containing VOC is discharged | emitted outdoors.

  FIGS. 9-14 is a block diagram which shows each mode of the VOC and moisture adsorption / desorption of the air purification system which concerns on another Example, and the delivery to indoor outdoor. In the embodiment shown in FIGS. 9 to 14, the first path portion 40 is connected to one side of the adsorption / desorption path 20 and the second path portion 50 is connected to the other side. A VOC adsorption means 6 and a moisture adsorption means 7 are arranged in the adsorption / desorption route 20 with the heating means 8 interposed therebetween. In this embodiment, the VOC adsorbing means 6 and the moisture adsorbing means 7 are fixed types instead of the rotor type.

  Further, the first route section 40 is provided with route switching means (damper) 22 so that the route of the air supplied to the adsorption / desorption route 20 can be switched between the route 41 from the outside and the route 42 from the room. Further, the second route section 50 is provided with route switching means (damper) 21 so that the route of the air discharged from the adsorption / desorption route 20 can be switched to either the route 51 to the outside or the route 52 to the room. Yes.

  In this embodiment, the air blowing direction can also be switched. By reversing the air blowing direction, the second route portion 50 is changed to the first route portion 40, and the first route portion 40 is changed to the second route portion 40. The route unit 50 is switched.

  Next, each mode will be described. FIG. 9 is a block diagram showing the VOC adsorption / indoor delivery mode, in which room air is supplied from the path 42 to the adsorption / desorption path 20, moisture in the room air is adsorbed by the moisture adsorption rotor 7, and the room air is VOC. VOC in room air is adsorbed by the adsorption rotor 6.

  If the VOC adsorption of the VOC adsorption rotor 6 is saturated or close to saturation, the mode is switched to the VOC separation / outdoor delivery mode. There are two VOC separation / outdoor delivery modes. As shown in FIG. 10, outside air is introduced into the adsorption / desorption path 20, and the outside air contains the VOC separated from the VOC adsorption rotor 6 or a decomposition product thereof and is externally provided. As shown in FIG. 11, room air is introduced into the adsorption / desorption path 20, and VOC released from the VOC adsorption rotor 6 or a decomposition product thereof is included in the room air and discharged to the outside.

  FIG. 12 is a block diagram showing a moisture adsorption / indoor delivery mode. In moisture adsorption / desorption, the air blowing direction is reversed, and the second path portion 50 at the time of VOC adsorption / desorption is the first route portion 40. In addition, the first path unit 40 switches to the second path unit 50.

  Then, room air is supplied from the path 42 to the adsorption / desorption path 20, the room air passes through the VOC adsorption rotor 6, and moisture in the room air is adsorbed by the moisture adsorption rotor 7.

  When the moisture adsorption of the moisture adsorption rotor 7 is saturated or close to saturation, the mode is switched to the moisture removal / outdoor delivery mode. There are two modes for this moisture detachment / outdoor delivery mode. As shown in FIG. 13, outside air is introduced into the adsorption / desorption path 20, and the moisture separated from the moisture adsorption rotor 7 is included in the outside air and discharged to the outside. As shown in FIG. 14, room air is introduced into the adsorption / desorption path 20, and moisture released from the moisture adsorption rotor 7 is included in the room air and discharged to the outside.

  The air purification system according to the present invention is not limited to a new house, but can be applied to an existing house.

Schematic of a house to which an air purification system according to the present invention is applied The block diagram which shows the dehumidification mode state of the air purification system The block diagram which shows the VOC removal mode state of the air purification system The figure seen from the AA direction of FIG. The same figure as FIG. 1 showing another embodiment The block diagram which shows the dehumidification mode state of the air purification system shown in FIG. The block diagram which shows the VOC removal mode state of the air purification system shown in FIG. Flow chart of the air purification system shown in FIG. The block diagram which shows VOC adsorption | suction and indoor delivery mode of the air purification system which concerns on another Example The block diagram which shows VOC separation | detachment and outdoor delivery mode of the air purification system which concerns on another Example The block diagram which shows VOC separation | detachment and outdoor delivery mode of the air purification system which concerns on another Example The block diagram which shows the moisture adsorption | suction and indoor delivery mode of the air purification system which concerns on another Example The block diagram which shows the water | moisture-content removal | extraction / outdoor delivery mode of the air purification system which concerns on another Example. The block diagram which shows the water | moisture-content removal | extraction / outdoor delivery mode of the air purification system which concerns on another Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air purification system, 2 ... Tubular passage, 3 ... Partition plate, 4 ... Supply path, 4a ... Intake port, 4b ... Clean air jet, 5 ... Delivery path, 5a, 5b ... Opening, 6 ... VOC adsorption means ( Rotor), 6a ... VOC adsorption rotor shaft, 7 ... moisture adsorption means (rotor), 7a ... moisture adsorption rotor shaft, 8 ... heating means, 9,10 ... blower, 11,12 ... damper, 21,22 ... Route switching means (damper), 40 ... first route portion, 41 ... route from outside, 42 ... route from inside, 50 ... second route portion, 51 ... route to outside, 52 ... route to indoor .

Claims (3)

A supply path for taking in indoor air containing moisture and VOC (volatile organic compounds) and returning the air from which moisture and VOC have been removed to the room, a delivery path for discharging the moisture and VOC to the outside, and an air flow in the supply path A first air blowing means for forming a flow; a second air blowing means for forming an air flow in the delivery path; a rotating moisture adsorbing means and a VOC adsorption disposed facing the supply path and the delivery path; And a heating means disposed between the moisture adsorbing means and the VOC adsorbing means in the delivery path, and a dehumidification mode and a VOC removal mode by reversing the air flow in the delivery path. An air purification system characterized by switching between. 2. The air purification system according to claim 1, wherein path switching means for switching the introduction air to the delivery path to either outside air or room air, and path switching for switching the air discharged from the delivery path to either indoors or outdoors. An air purification system comprising means. An adsorption / desorption path in which the moisture adsorption means and the VOC adsorption means are arranged across the heating means, a first path portion communicating with one side of the adsorption / desorption path, and a second path communicating with the other side of the adsorption / desorption path A route unit, and a blower unit that forms an air flow in the first route unit and the second route unit, and the first route unit switches the route indoors or outdoors by the first route switching unit. The second path section can be switched indoors or outdoors by the second path switching means, and the air flow in the first path section and the second path section is reversed. An air purification system characterized by switching between a dehumidification mode and a VOC removal mode.