JPH0222302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to indoor air cleaning equipment that is effective when alkaline gas components undesirable for the indoor environment surrounding the room are emitted. The present invention is particularly applicable to the field of air conditioning in exhibition rooms and storage rooms of cultural facilities such as art galleries and museums.

[Conventional technology]

Traditionally, in art galleries and museums built with reinforced concrete, gas components (which were found to be alkaline substances mainly composed of ammonia as a result of separation) that had an undesirable effect on exhibits such as paintings and collections were removed from the poured concrete. ), it could not be used immediately after completion, and a drying period of approximately one year was required (a period until the release of water and alkaline components from the concrete had almost completely disappeared).

Also, for the same reason, in such art museum exhibition rooms, there is generally an inner wall B inside the room surrounded by the concrete wall A, as shown in Figure 2.
An inner room 1 is provided surrounded by a concrete wall A to prevent gas components emanating from the concrete wall A from reaching the inner room 1 as much as possible.

However, in the past, the air suction port 3 connected to the return side of the air purifier 2 was opened in the interior room 1 to directly ventilate the interior of the interior room 1. Ventilation of the gap C between the inner wall B (including the ceiling pocket) is not considered at all. In the figure, 4 is an air outlet connected to the discharge side of the air cleaning device 2, and 5 is an outside air intake port of the air cleaning device 2.

Therefore, in the gap C, air containing gas components undesirable for the indoor environment emitted from the concrete wall A may remain, and the concentration thereof may become extremely high. Air containing dense gas components is trapped in the gap between inner wall B and inner wall B.
There was a risk that it would pass through that and enter the interior room 1.

[Problem that the invention seeks to solve]

As mentioned above, in the past, even if a museum was built,
It was not possible to use the building immediately after completion, and it was not possible to satisfy the client's request for immediate use.
Furthermore, with the conventional double-wall structure and ventilation system, it was not possible to completely remove the gas components emitted from the concrete walls, and there was a risk that exhibits would be adversely affected.

Therefore, the present invention provides an indoor air purifying system that can be used immediately after construction is completed in cultural facilities such as art museums and museums made of reinforced concrete, and that can maintain an extremely clean indoor air environment. The purpose is to

[Means for solving problems]

In the present invention, we pay particular attention to the alkaline gas emitted from the wall A, and install an alkaline gas absorption filter on the return air intake side of the air purifier, and use this alkaline gas absorption filter to absorb the air that has absorbed alkaline gas components. I try to circulate it.

[Effect]

In the equipment configured as described above, air flows as follows. Clean air is first sent to the interior room. Air within the inner chamber flows into the gap from an outlet provided in the inner wall B. The air in the gap is then exhausted to the outside from the gap air outlet. By flowing air in a fixed direction in this way, not only the air inside the interior room but also the air in the gap is efficiently ventilated.
Air in the gap will no longer leak into the inner chamber.

Then, the contaminated air discharged outdoors is taken into the air cleaning device, where alkaline gas components that are undesirable for the indoor environment are removed, and the air is again sent indoors as clean air.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

A in the figure is a concrete wall, and inside the room surrounded by this concrete wall A is provided an inner room 11 surrounded by an inner wall B. This interior room 11 is used as an exhibition room or the like. A relatively narrow gap C is formed between the concrete wall A and the inner wall B (the ceiling space Ca is a normal size).
An indoor air outlet 12 is formed in the lower part of the inner wall B to communicate the inner chamber 11 and the gap C. This interior air outlet 12 is for flowing the air inside the interior chamber 11 into the gap C, and is provided with a rattle.

In addition, there is a clean air inlet 1 on the ceiling of the interior room 11.
3 is open. The air inlet 13 is connected to the outlet 16 of the air purifier 15 via the air conditioner 14.
are connected to each other by an air supply duct 17. on the other hand,
A gap air outlet 18 is opened in the ceiling Ca, from which the air in the gap C is discharged to the outside. This gap air outlet 1
8 is the return air intake port 1 of the air purifier 15
9 through a return air duct 20.

The air cleaning device 15 used here is as follows. That is, a fan 22 is provided inside the casing 21, and the suction side flow path inside the casing 21 is partitioned into two flow paths 24 and 25 by a partition wall 23 along the air flow direction. The outside air intake side and the other side are the return air intake side, and an acidic gas absorption filter 26 is arranged in the passage 24 on the outside air intake side, and an alkaline gas absorption filter 27 is arranged in the passage 25 on the return air intake side. This is what I did. Alkaline gas absorption filter 27
In this case, in particular, the following adsorbent is used as one that can effectively absorb the ammonia gas emitted from the concrete wall A.

A: Granulated activated carbon (or crushed coconut shell activated carbon) treated with phosphoric acid B: Mixture of potassium permanganate, phosphoric acid, and zeolite C: Activated clay (SiO ₂ + Al ₂ O ₃ + Fe ₂ O ₃ + MgO) D Activated carbon treated with sulfuric acid E Activated alumina loaded with platinum In addition, this air purifier 15 includes a coarse dust filter 28 in the flow path 24 on the outside air intake side, two flow paths 24 on the suction side, A fine dust filter 29 is provided at the position where the filters 25 join together. 30 is an outside air duct.

In equipment with such a configuration, first, clean air is sent into the interior room 11 from the air inlet 13 in the ceiling. Air in the interior chamber 11 is sucked into the gap C through an interior air outlet 12 provided at the bottom of the interior wall B.
Then, the air is drawn in through the gap air outlet 18 installed in the ceiling Ca through between the wall A and the inner wall B, and is led to the air purifying device 15 through the return air duct 20. In the air purifier 15, return air from the room is passed through an alkaline gas absorption filter 2.
Ammonia is removed at step 7. In addition, the outside air introduced from the outside air duct 30 is passed through a coarse dust filter 28.
Relatively large dust particles are removed by the filter 29, and then acidic gases such as NO ₂ and SO ₂ are removed by the acid gas absorption filter 29. After these airs are mixed and fine dust is removed by a fine dust filter 29,
The air is guided to the air conditioner 14 by the fan 22 and supplied into the interior room 11 through the air supply duct 17. Therefore, the inside of the interior room 11 is always maintained in a clean air environment. On the other hand, alkaline components generated from the concrete wall A are efficiently guided to the air purifier 15 and removed there. This prevents alkaline gas from remaining in the gap C.

In the case of this equipment, it is particularly important to set the mutual positions of the interspace air outlet 18 and the interior air outlet 12 so that the entire gap C becomes an air flow path. This is because by doing so, the air within the gap C can be thoroughly ventilated.

Further, in order to further enhance the ventilation effect, a fan of an appropriate size may be provided at the indoor air outlet 12.

In addition, in the above embodiment, the position of the indoor air outlet 12 provided in the inner wall B was located below the room.
It does not necessarily have to be downward.

〔Effect of the invention〕

The present invention can provide an extremely good ventilation effect, especially when alkaline gas components are generated from the outer wall A that have an unfavorable effect on indoor circulation.

For example, when the present invention is applied to an exhibition room of an art museum, the following effects can be obtained.

Since the alkaline gas generated from the concrete wall is discharged outside along with the unidirectional air flow passing through the gap, it does not remain in the gap and there is no fear of it entering the interior room. Therefore, the interior room is always maintained in a good air environment, and can be made available for use immediately after construction is completed without requiring a period for the concrete to dry out. This allows us to meet the needs of the owner.

Since the space is constantly ventilated, it also contributes to faster drying of the concrete and suppresses the generation of alkaline substances from the concrete in a short period of time. Therefore, even if a concrete drying period is set for safety reasons,
It can be used at an early stage.

Moreover, the air in the interior room 11 surrounded by the inner wall B inside the room surrounded by the wall A,
The air is discharged to C between the outer wall A and the inner wall B, and the air inside C is discharged and taken into the air purifying device 15, which removes alkaline gas components from the air. After selectively absorbing the air, the air is supplied to the interior chamber 11, so that even if the wall A is a newly erected concrete wall, for example, the alkaline gas generated from the concrete wall will be absorbed between
The alkaline gas is quickly discharged without being retained in the interior, and there is no risk of the alkaline gas intruding into the interior chamber 11, and the air from which the alkaline gas has been removed is supplied to the interior chamber 11 to circulate the indoor air. As a result, energy saving effects can also be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the prior art. A... Concrete wall, B... Inner wall, C... Gap, 11... Inner room, 12... Inner room air outlet, 1
3... Clean air outlet, 15... Air cleaning device,
18...Gap air outlet, 25...Flow path on the return air intake side, 27...Alkaline gas absorption filter.

Claims (1)

[Claims] 1 In a room surrounded by wall A, an inner room 11 surrounded by inner wall B is provided, and wall A and inner wall B
A gap 〓C is formed between the . The air cleaning device 15 is installed in C.
While communicating with the flow path 25 on the return air intake side of
The internal air exhaust port 18 is opened, and an internal air exhaust port 12 is provided on the internal wall B to flow the air from the internal chamber 11 into the space C, and the air purifying device 15
The indoor air cleaning equipment is characterized in that an alkaline gas absorption filter 27 for selectively absorbing alkaline gas components emitted from the wall A is disposed in the flow path 25 on the return air intake side.