JPH0510569B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an air purification room, and in particular to an air cleaning room in which clean air blown from an upper position in the room, such as a ceiling, is sucked in through a suction port provided on the floor. Concerning clean rooms.

[Conventional technology]

This type of conventional air cleaning room is shown in Figure 2 or 3.
As shown in the figure.

The one shown in Figure 2 is relatively simple.
The air cleaning room 10 has a three-layer structure including a ceiling 12, a working chamber 14, and a lower floor 16, and necessary equipment 18 is arranged within the working chamber 14. An air purifier 20 with a built-in high-performance filter is placed in the ceiling 12 at an appropriate location, and an air outlet 2 facing the work room 14 side of the ceiling 22 is installed.
Clean air 26 is blown out from 4. In addition, the floor surface 28
An air inlet 30 for sucking air inside the work chamber 14 is arranged at a proper location in a part of the work chamber 14.

A duct 34 from an air conditioner 32 is connected to the ceiling 12, and a duct 34 from the air conditioner 32 is connected to the lower floor 16.
2 are connected by a duct 36. Duct 3
6, an exhaust duct 38 and an outside air intake duct 40 are connected. In the above configuration,
The conditioned air whose temperature and humidity have been adjusted by the air cleaner 32 is introduced into the ceiling 12 from the duct 34, and after being made into clean air by the air cleaner 20, it enters the work room 14 from the outlet 24. It's blown out. This clean air entrains dust generated in the work room 14 and is sucked in through the air inlet 30, passes through the lower floor 16, the duct 36, and returns to the air conditioner 32. During this air circulation process, a part of the air is exhausted from the exhaust duct 38, and an amount of outside air commensurate with the exhaust amount is taken in from the outside air intake duct 40, thereby increasing the freshness of the circulating air to a certain value or higher. Keep it. By the way, in the above-mentioned air cleaning room, since the suction port 30 is provided only on a part of the floor surface 28, some of the dust generated in the work chamber 14 is transferred to the floor surface that is not designated as the suction port. It falls and accumulates. Dust generated by friction between the worker's shoes and the floor as the worker walks also accumulates on the floor.

In the above configuration, since the flow velocity of the suction airflow on the floor surface is almost zero, the amount of dust deposited on the floor surface increases with the passage of time. Therefore, when the worker walks, the accumulated dust is thrown up, making it impossible to maintain the desired level of cleanliness within the work chamber 14.

The system shown in FIG. 3 is generally referred to as an all-over vertical laminar flow system. This air purification room 42
However, the difference from Fig. 2 is, firstly, that a high-performance filter 44 is placed on the entire surface of the ceiling and clean air 46 is blown out in a vertical laminar flow, and secondly, the inlet provided on the floor is also The point is that most of the area other than the floor surface 28 on which the device 18 is installed is used as the suction port 48. According to this type of air cleaning room 42, clean air descends uniformly in the work room 14, and there is no dust rising on the floor, so the cleanliness of the room can be significantly improved. However, construction costs for such an air purification room are enormous. Particularly when modifying an existing building to create an air purification room, it is difficult work to convert most of the floor surface into an air inlet, and there is a problem in that modification is virtually impossible.

[Problem that the invention seeks to solve]

The object of the present invention is to prevent dust accumulated on the floor surface from coming into contact with workers walking even in an air cleaning room where only a part of the floor surface is equipped with a suction port and the rest of the floor surface is not used as a suction port. To provide an air purifying room capable of preventing air pollution and maintaining cleanliness in a working room.

[Means for solving problems]

The present invention provides an air purification room in which clean air is blown out from an upper position in the room and indoor air is sucked in through a suction port provided only on a part of the floor surface.
The present invention is characterized in that a lattice floor is laid on a portion of the floor surface where workers walk, which is not the suction port.

[Effect]

Dust falling toward the floor passes directly over the upper surface of the lattice floor and accumulates on the floor. On the other hand, since the worker walks on the upper surface of the grid floor, the dust accumulated on the floor surface does not come into direct contact with the worker's shoes. Therefore, even when the worker walks, the dust accumulated on the floor does not fly up.

〔Example〕

FIG. 1 shows an embodiment of the present invention. In the same figure, the second
The same parts as those in the figure are given the same reference numerals. A suction port 30 is provided only in a part of the floor surface 28. A lattice floor 50 is laid on the floor surface 28 except for the portion where the equipment 18 is placed. As shown in FIG.
are vertically connected in a lattice pattern in the X and Y directions. The lattice floor 50 is not limited to the one shown in FIG. 4, but can also be made of commercially available grating materials, expanded metal, wire mesh, etc., which have a large porosity in plan view, and
Any material may be used as long as it can withstand the load of a worker or the like. In the above configuration, most of the dust generated in the work room 14 is entrained in the indoor airflow, sucked in through the suction port 30, and captured by the pre-filter of the air conditioner (not shown) or the high-performance filter of the air purifier 20. Ru. On the other hand, some dust leaves the indoor airflow and falls toward the floor. The fallen dust passes through the openings 54 in the grid floor 50 and accumulates on the floor surface 28. Since the worker walks on the upper surface of the grid floor 50, the dust accumulated on the floor surface 28 does not come into direct contact with the worker's shoes. This prevents accumulated dust from flying up as the worker walks, and maintains a high degree of cleanliness within the work chamber 14.

The height of the grid floor 50 is preferably as high as possible in order to reduce the influence of turbulence acting on the floor surface.
Usually, it is selected in the range of 1 to 10 cm, but it is not limited to this range.

FIG. 5 shows another embodiment of the invention. In this embodiment, the portion 2 of the floor surface where the lattice floor 50 is laid
8A is stepped and thinner than the other floor portion 28B for arranging equipment, etc., and the upper surface of the lattice floor 50 and the upper surface of the other floor portion 28B are approximately at the same height. Ru. According to this embodiment, there is no need to lay the lattice floor 50 in accordance with the special shape and dimensions of the equipment 18, and consistency between the lattice floor and the floor surface can be ensured. In addition, the code|symbol 56 in a figure means the support|pillar which supports the floor surface 28.

FIG. 6 shows still another embodiment of the present invention. In this embodiment, an adhesive sheet 58 is laid between the floor surface 28 and the grid floor 50. Adhesive sheet 5
8 has adhesive applied to its upper surface, and the lattice floor 5
The dust that passes through 0 falls and adheres to this adhesive sheet 58. Therefore, as long as the upper surface of the adhesive sheet 58 is not covered with fallen dust, the adhesive sheet 58 exhibits the effect of completely trapping dust. Therefore, even if turbulence occurs on the floor due to strenuous walking by workers, dust can be completely prevented from flying up. The adhesive sheet 58 is periodically replaced with a new one.

FIG. 7 shows still another embodiment of the present invention. In this embodiment, a gap 60 is provided between the floor surface 28 and the grid floor 50, and a water nozzle 62 is provided on the floor surface 28.
Rinse water sprayed from the pipe. The cleaning water collects in a groove 64 provided at an appropriate location, and after removing dust with a treatment device (not shown), it is circulated for use. According to this embodiment, the floor surface below the grid floor is constantly covered with cleaning water.
Alternatively, since the floor surface 28 is washed intermittently, a large amount of dust does not accumulate on the floor surface 28. Therefore, it is possible to reliably prevent dust from flying up.

FIG. 8 shows still another embodiment of the present invention. In this embodiment, a collision plate 66 is placed directly below the suction port 30, and an adhesive sheet 68 is attached to the upper surface of the collision plate 66. According to this embodiment, a portion of the indoor air 70 sucked in through the suction port 30 collides with the adhesive sheet 68 . Dust in the collided air adheres to the adhesive sheet 68 and is not scattered again. That is, part of the dust generated in the work chamber 14 or the like can be collected by the adhesive sheet. Therefore, it is possible to reduce the dust load on the pre-filter of the subsequent air conditioner and the high-performance filter of the air cleaner. Further, the accumulation of dust in the dead zone of the lower floor 16 can be reduced. For this reason, back pressure (positive pressure) may occur in the lower part of the floor 16 due to some reason.
When this occurs, there is an effect that the dust concentration in the airflow flowing back from the suction port 30 to the working chamber 14 can be significantly reduced. The adhesive sheet 68 may be updated periodically.

In the description of each of the embodiments described above, it is assumed that the lattice floor has an open top and bottom surface, and that falling dust passes through the lattice floor. However, the lattice floor according to the present invention is not limited to this, and it is sufficient that at least the top surface is open, and the bottom surface may be sealed. In the case of a lattice floor with a sealed lower surface, it goes without saying that only the portion located directly above the suction port 30 should also be open on the lower surface. It goes without saying that among the embodiments described above, the present invention cannot be directly applied to the embodiments shown in FIG. 6 or 7.

The concept of a lattice floor according to the present invention does not simply mean a lattice-like shape, but may be one in which the upper surface is provided with an opening while ensuring a distance from the floor surface. Therefore, as shown in FIG. 9, a structure in which a perforated plate 74 is placed on a pedestal made of square timbers 72 is also included in the lattice floor according to the present invention, and is different from the lattice floor shown in FIG. 4. Demonstrates similar effects.

In addition, the blowing position of the clean air in the present invention is not limited to the ceiling position of the work room, but may also be a wall surface position. Further, the grid floor may be provided only in a part of the area where workers walk.

〔Effect of the invention〕

The air cleaning room according to the present invention is characterized in that a lattice floor is installed in the part of the floor where workers walk, which is not used as an inlet. Pass through the top of the floor,
Deposits on the floor. Therefore, the dust accumulated on the floor surface does not come into direct contact with the worker's shoes. Therefore, even when the worker walks, the accumulated dust does not fly up, and the cleanliness inside the work room can be stably maintained. Moreover, according to the present invention, an air purification room with high cleanliness can be realized without major remodeling of an existing building.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are side sectional views showing an air cleaning room according to the prior art, and FIG. 4 is an example of a lattice floor according to the present invention. FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are side sectional views showing main parts of other embodiments of the present invention, and FIG. 9 is a modified example of the lattice floor according to the present invention. FIG. 12... Ceiling, 14... Working room, 16... Lower floor, 20... Air cleaner, 28... Floor, 30
...Suction port, 50...Grate floor.

Claims (1)

[Scope of Claims] 1. In an air cleaning room in which clean air is blown from an upper position of the room and the air inside the room is sucked in through a suction port provided only on a part of the floor surface, the air in the room is not defined as the suction port. An air purification room characterized by having a grid floor installed in the area where workers walk on the bare floor. 2. The air cleaning room according to claim 1, further comprising means for capturing fallen dust between the grid plate and the floor surface.