JPH055391Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a clean room air outlet used in precision machinery factories, pharmaceutical factories, food factories, animal breeding rooms, etc.

[Prior art]

Generally, in a clean room, the entire ceiling of the room is
A laminar flow clean room that is equipped with a HEPA (high performance) filter and blows out a uniform vertical airflow from the ceiling to the floor to create an ultra-clean space;
There are two types of turbulent flow clean rooms that have HEPA filters scattered about. In such clean rooms, the latter type of turbulent flow type clean room aims to ventilate and clean the clean room with less blowout and air volume than the former case, and although it has the advantage of being able to reduce the cost of equipment, This has the disadvantage that the airflow cannot be uniformly diffused indoors, resulting in variations in cleanliness within the room.

Therefore, in recent years, in turbulent flow clean rooms, from the perspective of energy conservation, even if the amount of supplied air is the same, it is used as effectively as possible to eliminate variations in cleanliness and improve the ventilation efficiency of the entire clean room. There are moves to improve it. One example is a method that attempts to improve ventilation efficiency by devising the shape and form of the air outlet.

Figures 8 and 9 show examples of conventional air outlets, with punched metal 5s having a large number of openings.
0 is formed in the shape of a ship's bottom or a truncated pyramid, the bottom surface of the HEPA filter is covered with such a punched metal 50, and after pressurizing the clean air from the HEPA filter, it is blown out in all directions from numerous openings. It is.

[Problem to be solved by this invention] However, in the case of the conventional air outlet as described above, even though the side surface 50a is provided so that airflow is blown out near the ceiling, the downward flow from the HEPA filter is There was a problem in that the direction of the airflow could not be changed to the side, and the blowout airflow could not be sufficiently supplied to the vicinity of the ceiling. In addition, the supply of blowing airflow is poor at locations corresponding to the ridgelines of the outer shape.

This idea was made to solve the above-mentioned problems, and its purpose was to equalize the degree of ventilation in various parts of a room, and even with the same amount of air, compared to the conventional method. An object of the present invention is to provide an air outlet for a clean room that can utilize its air volume (energy) more effectively than an air outlet.

[Means to solve the problem]

The clean room air outlet according to the present invention has a first
As shown in the figure, the downstream surface of the high performance filter 1 is
The punching metal 2 is covered with a punching metal 2 having a convex curved surface 2a on the downstream side of the blowing airflow.
A rectifier plate 3 is disposed between the high-performance filter 1 and the high-performance filter 1 to guide clean air from the high-performance filter in the normal direction of the curved surface 2a.

The shape of the punching metal 2 is preferably a semicylindrical shape as shown in FIG. 7, but it may also be a hemispherical shape as shown in FIG. It may be something you have. Also,
The curvature of the curved surface 2a may be constant or may be changed.

The current plates 3 may be arranged radially such that their bases are located at equal intervals, and may be aligned with the normal line of the curve 2a or may be offset. The current plate 3 may be fixed to the punching metal 2, or may be made movable by attaching a pin to the base to finely adjust the direction, or a fourth plate may be installed depending on the installation location.
As shown in the figure (corner part), the left half may be arranged in parallel. Further, the number of rectifier plates 3 is appropriately determined in consideration of the size of the HEPA filter, pressure loss, etc.

Note that the punching metal 2 is a plate in which a large number of openings are evenly punched, and the shape of the openings is preferably circular, but is not limited to this, and the opening ratio is determined depending on the flow rate,
It is determined as appropriate based on pressure loss, etc.

[Effect]

With the punching metal 2 having the curved surface 2a,
There is no ridgeline like in the past, and the airflow is blown out radially, making it possible to supply the airflow in all directions. However, as shown in FIG. 5, the punching metal 2 alone cannot sufficiently supply the airflow near the ceiling, but the presence of the rectifier plate 3 prevents the downward airflow from the HEPA filter 1. The direction can be forcibly changed to the side, and a sufficient amount of airflow can be supplied to the vicinity of the ceiling (see Figure 6).

Furthermore, the presence of the rectifier plate 3 increases the directivity of the blown airflow, and together with the radial airflow of the punched metal 2, clean air is uniformly supplied to various parts of the room in a short time.

〔Example〕

As shown in Fig. 7, this is an example of a semicylindrical air outlet, in which a cylindrical curved surface 2a and both side surfaces 2c are formed by punching metal 2, and seven rectifier plates 3 are arranged inside. , it is constructed by horizontally protruding mounting flanges 4 for mounting the HEPA filter 1 on the four sides of the upper part.

The rectifying plates 3 are movable and are attached to attachment holes 7 of the side frame 6 via pins 5 so that the base portions are equally spaced.

Note that the opening 8 of the punching metal 2 is circular, and the aperture ratio is about 20%.

[Effect of idea]

As mentioned above, the clean room air outlet according to the present invention has a large number of rectifier plates arranged inside the punched metal having a curved surface along the normal direction of the curved surface, so that the air outlet side, where conventional methods have poor ventilation, is installed. In addition to being able to supply sufficient airflow to the vicinity of the ceiling on both sides, it also eliminates areas where the airflow is poorly supplied, which is thought to be caused by the ridge lines of the conventional external shape.
The radial airflow created by the punched metal and the directivity created by the rectifying plate combine to supply clean air uniformly to various parts of the room in a short time.

As a result, even if the air volume is the same, the air volume can be utilized more effectively compared to a conventional air outlet.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an outline of the clean room air outlet according to the present invention, Figs. 2 and 3 are schematic perspective views and a schematic sectional view showing modified examples, and Fig. 4 is an installation using a movable rectifying plate. Schematic sectional views showing examples, Figures 5 and 6 are schematic diagrams showing airflow conditions when only the punching metal of the present invention is installed, and the punching metal of the present invention and rectifying plate are used, and Figure 7 is a schematic cross-sectional view showing an example. is a partially cutaway perspective view showing an embodiment of the present invention, FIGS. 8 and 9 show conventional air outlets, A is a schematic sectional view, and B is a schematic cross-sectional view.
is a perspective view. 1... High performance filter, 2... Punching metal, 2a... Curved surface, 2b... Straight section, 3... Current plate, 4... Mounting flange, 5... Pin, 7... Mounting hole, 8... Opening.

Claims (1)

[Scope of utility model registration request] The downstream surface of the high-performance filter is covered with a punching metal that has a convex curved surface on the downstream side of the blown airflow.
A clean room air outlet characterized in that a rectifier plate is disposed between the punched metal and the high-performance filter to guide clean air from the high-performance filter in the normal direction of the curved surface.