JP7660400B2 - Air Purifier - Google Patents

Description

The present invention relates to an air purification device.

For example, facilities that store and exhibit cultural assets, such as art galleries and museums, may take measures to prevent unwanted substances (such as ammonia and formaldehyde) emitted from concrete structures and interior materials from affecting the cultural assets.
As a countermeasure against this, a method has been used in which the air inside the display case is sucked in by a suction machine and passed through a filter to remove unwanted substances contained in the air (for example, Reference 1).

JP 2015-075239 A

In order to reduce the concentration of unwanted substances in a room after it is put into service, it is preferable to remove and reduce unwanted substances emitted from building materials (such as concrete frameworks and interior materials) from the construction stage. However, the air purifier in Cited Document 1 is intended to be installed in a closed, narrow space such as an art exhibition case, and therefore may not be able to efficiently remove unwanted substances in a large space (open space) with few partitions, such as a room under construction. In addition, introducing outside air into the room may increase the humidity in the room, causing condensation.
From this perspective, an object of the present invention is to efficiently reduce unnecessary substances floating in a room.

The air purifying device of the present invention, which solves the above-mentioned problems, comprises a blower that circulates air in a room, an exhaust flow path through which air discharged from an outlet of the blower flows, and an adsorbent that removes unnecessary substances generated from building materials, wherein the exhaust flow path is covered at least in part with a cover having a breathable material, the adsorbent is placed inside the cover, and a pedestal with multiple shelves on which the adsorbent is placed is disposed inside the cover .
According to this air purifier, the air discharged from the blower is supplied to the exhaust passage covered with a cover, so the contact efficiency between the adsorbent and the unwanted substances contained in the air is increased compared to the case where the adsorbent is simply placed in the room. Also, because the blower is used to circulate the air in the room, air can be efficiently supplied to the exhaust passage even in a large space with few partitions, such as a room under construction.
In addition, if the cover is made of a material (non-woven fabric or mesh material) that is less likely to become clogged with dust generated during construction work, purification operation can be performed without reducing the purification capacity (amount of air circulation). Therefore, it is possible to efficiently reduce unnecessary substances generated during the construction stage.
In addition, the contact surface between the adsorbent and the air can be expanded three-dimensionally, so that unnecessary substances can be reduced more efficiently.

The air purifier of the present invention can efficiently reduce unwanted substances floating around in the room.

1 is a perspective view showing an air purification device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a base used in the embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings. The present invention is not limited to the following embodiments.
(Air purifier)
The air purifying device 1 is a device for reducing unwanted substances in a room, for example, in an art gallery, a museum, etc. The unwanted substances are, for example, ammonia, formaldehyde, etc. As shown in FIG. 1, the air purifying device 1 includes a blower 2, an exhaust flow path 3, a cover 4 that covers the exhaust flow path 3, and an adsorbent 5.
The blower 2 is a device that generates an air flow. The blower 2 takes in indoor air from an intake port 2b into a cylindrical body 2a and exhausts it from an exhaust port 2c. Here, a blower that combines a motor and an impeller (not shown) is used, but the present invention is not limited to this.
The exhaust flow path 3 is a flow path through which air discharged from the blower 2 flows. The exhaust flow path 3 is covered by a cover 4. The cover 4 is attached to the exhaust port 2c of the blower 2. The cover 4 has a bottomed cylindrical shape. The air blown out from the blower 2 passes through the exhaust flow path 3 covered by the cover 4 and is discharged to the outside. The cover 4 is made of a material (nonwoven fabric or mesh material) that is unlikely to become clogged with dust generated by construction work, for example. In this embodiment, the cover 4 is attached to the exhaust port 2c side, but it may be attached to the suction port 2b side.
For example, zeolite, activated carbon, deodorant, etc. are used as the adsorbent 5. It is preferable to appropriately change the adsorbent 5 according to the properties of the unnecessary substances.
As shown in Fig. 2, it is preferable to dispose a pedestal 6 in the exhaust flow path 3. The pedestal 6 in this embodiment has multiple shelves arranged vertically at intervals, and the adsorbent 5 is placed on each shelf. The multiple shelves are supported by multiple supports. The shelves may be flat or made of a mesh material. The pedestal 6 may be omitted.

(Evaluation test)
A test was conducted to evaluate the effect of reducing the ammonia concentration in a room. The test was conducted under conditions of a temperature of 20-22°C and a humidity of 40-55%. As the adsorbent 5, a material (Fresh Pearl manufactured by Nippon Paper Paripier Co., Ltd.) that combines granular pulp with ferric sulfate to adsorb and decompose gas was used.
The measurement results are shown in Table 1. The examples in the table are the results of the evaluation test of the air purifier 1. The ammonia concentration in the room was 30 ppm before using the air purifier 1. After one hour, the ammonia concentration in the room decreased to 25 ppm, and after two hours from the measurement, it decreased to 20 ppm.

(Comparative Example 1)
Next, a description will be given of Comparative Example 1. Comparative Example 1 is an evaluation result when no adsorbent was installed in the room and only the blower 2 was operated. The initial concentration of ammonia was 45 ppm, but the other conditions were the same as those in the evaluation test.

As shown in Table 1, the ammonia concentration in the room remained at 45 ppm from the start of measurements and did not decrease.

(Comparative Example 2)
Next, Comparative Example 2 will be described. Comparative Example 2 shows the evaluation results when the blower 2 was not used and only the adsorbent 5 was installed indoors. In other words, it was confirmed whether the ammonia concentration would decrease without circulating air. The other conditions were the same as those in the evaluation test.

As shown in Table 1, the ammonia concentration in the room was maintained at 30 ppm from the start of the measurement and did not decrease. In other words, when only the adsorbent 5 was installed without circulating the air, the ammonia concentration in the room could not be decreased.

(Action and Effect)
According to the air purifying device 1 of this embodiment described above, the air containing unnecessary substances discharged from the blower 2 is supplied to the exhaust flow path 3 covered by the cover 4, so the contact efficiency between the unnecessary substances contained in the air and the adsorbent 5 is increased compared to the case where the adsorbent 5 is simply placed in the room. Furthermore, since the blower 2 is used to circulate the air in the room, air can be efficiently supplied to the exhaust flow path 3 even in a large space with few partitions, such as a room under construction. Therefore, the unnecessary substances floating in the room can be efficiently reduced.

In addition, if the cover 4 is made of a material (nonwoven fabric or mesh material) that is unlikely to become clogged with dust generated during construction work, purification operation can be performed without reducing the purification capacity (amount of air circulation). This makes it possible to efficiently reduce unnecessary substances generated during the construction phase.

In addition, a base 6 on which the adsorbent 5 is placed is disposed inside the cover 4, so that the contact surface between the unwanted substances contained in the air and the adsorbent 5 can be expanded three-dimensionally, thereby enabling more efficient reduction of unwanted substances.

The above describes an embodiment of the present invention. However, the present invention is not limited to the above embodiment, and each component can be modified as appropriate without departing from the spirit of the present invention. For example, although the shelf boards of the base 6 are configured with three levels, they may have more than three levels.

Reference Signs List 1 Air purifier 2 Blower 3 Exhaust passage 4 Cover 5 Adsorbent 6 Base

Claims (1)

A fan to circulate air in the room,
an exhaust flow path through which air discharged from an outlet of the blower flows;
and an adsorbent for removing unnecessary substances generated from the building materials;
The exhaust flow path is at least partially covered with a cover having a breathable material,
The adsorbent is disposed inside the cover,
The air purifying device is characterized in that a base having a plurality of shelves on which the adsorbent is placed is disposed inside the cover .

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