JPH11201538A - Blow out chamber of air supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow even flow-sped distribution with a simple configuration by providing a perforated plate whose opening-percentage is larger at a peripheral part than at a central part at an air blowout opening surface of a blow out chamber where an air whose temperature and humidity are adjusted is blown out to a specified range at an air supply position, and setting, upright, a guide plate on a lower stream side of the perforated plate. SOLUTION: Related to a blow out chamber 1 wherein an air whose temperature and humidity are adjusted, supplied from a constant temperature/humidity air supply device is taken in through an air guide opening 13 and blown out into a device which is supplied with air from a perforated plate 11 provided at an air blow out opening surface, the perforated plate 11 whose opening percentage is larger at a peripheral part than at a central part is used. Thus, the flow rate and flow speed of the air just after blown out are made large at the peripheral part while small at the central part as shown with an allow 32.... By providing a guide plate 12 at the peripheral part of the opening, the air, at the peripheral part, blown out of the perforated plate 11 is directed, while the air at the central part is guided by the air at the peripheral part with larger flow rate and speed, for even flow-speed distribution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply apparatus for supplying air of which temperature and humidity is controlled by an air supply apparatus to a predetermined range of a supply position with a uniform flow velocity distribution to control the temperature and humidity. The present invention relates to improvement of a blowout chamber.

[0002]

2. Description of the Related Art As shown in FIG. 4a1, a perforated plate 101 is disposed at an air outlet in a blowing chamber of a conventional air supply apparatus of this type, and a flow velocity distribution in a plane perpendicular to the blowing direction is provided. Are equalized, and b1 in FIG.
As shown in FIG. 1, there is a type in which a grill 102 (wind direction plate) is arranged at an air outlet to regulate the wind direction.

[0003]

However, when the perforated plate 101 is used, as indicated by arrows 32, 32,... Indicating the flow velocity and direction of a2 in FIG. The distribution becomes uniform, but the directionality is not fixed, so as shown by the spread of air 31, the air spreads out immediately after being in contact with the surrounding air and is blown out, and the flow velocity distribution is slightly away from the outlet. As a result, the flow rate decreases before reaching the supply position 21, and the temperature of the supply range 22 cannot be controlled uniformly.

In the case where the grill 102 (wind direction plate) is provided, as shown in b2 of FIG. 4, the direction of the blown-out air is determined so that the degree of diffusion is small and the reach is long, but the flow velocity distribution is in the chamber. Immediately after being blown out due to contact with the inner wall, the flow rate difference is further increased under the influence of the surrounding air before reaching the supply position 21 due to unevenness, and the temperature of the supply range 22 can be controlled uniformly. Can not. Further, forming the grill 102 requires a large number of wind direction plates, so that the cost is high and the structure is complicated and heavy.

[0005] Even if both are combined to make the blowing velocity distribution uniform and have a direction, the surrounding air is affected before reaching the supply position, and the flow velocity in the central part is high and the peripheral part is fast. The problem that the flow velocity is slow and the flow velocity distribution becomes non-uniform and the temperature cannot be controlled uniformly in the supply range cannot be solved.In addition, since a perforated plate and many wind direction plates are required, the structure becomes more complicated. There is a problem that the cost is high and the weight increases.

SUMMARY OF THE INVENTION An object of the present invention is to disclose a low-cost air blowing chamber having a simple structure, a uniform flow velocity distribution, a sufficient flow rate distribution, and a simple structure at a supply position at a distance from a blowing port. is there.

[0007]

According to the present invention, there is provided an air blowing chamber which is connected to an air supply device, regulates a flow rate and a direction, and supplies air to a supply object. A perforated plate having a large outer peripheral portion and a small central portion is provided on the air blowing opening surface of the facing blowing chamber, and a guide plate parallel to the blowing direction is provided on the outer peripheral portion of the blowing opening surface downstream of the perforated plate. It is an object of the present invention to achieve the above-mentioned object by an air blowing chamber characterized by being provided upright.

[0008]

That is, in the blowing chamber of the air supply device according to the present invention, the air supplied into the blowing chamber has a sufficient volume in the blowing chamber to reduce the flow velocity and equalize the pressure. Then, by passing through the perforated plate whose opening ratio is larger at the outer periphery and smaller at the center, the flow rate and flow velocity of the air immediately after being blown out are larger at the outer periphery and smaller at the center. The direction is regulated by the flow of air along the guide plate.

By the time the air reaches the supply position, the air is gradually diffused while gradually reducing the flow velocity.

At this time, the air having a high flow velocity in the outer peripheral portion decelerates more greatly than the air in the central portion due to the resistance due to the contact with the surrounding air, and reaches the supply position at a distance from the central portion. The flow rate becomes even throughout.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail. FIG. 1 is a schematic diagram of an apparatus according to the present invention. The constant-temperature and constant-humidity air supply device 50 supplies air whose temperature and humidity are adjusted through the blowing chamber 1, and controls the surroundings of the supply target 20 disposed in the supply target device 200 to a desired temperature and humidity atmosphere. It is.

FIG. 2 is a diagram showing details of an embodiment of the present invention. When the air supplied from the constant temperature / humidity air supply device is taken in from the air inlet 13 and blows out from the perforated plate having a large outer peripheral portion and a small central portion, the blowout chamber 1 applies pressure uniformly to the perforated plate. Because of the necessity, it is desirable to make the volume sufficient to reduce the flow velocity and equalize the pressure.

The perforated plate 11 having a large opening ratio at the outer peripheral portion and a small central portion has a large opening ratio at the outer peripheral portion and a small central portion.
As shown by arrows 32, 32,... Representing the flow velocity and direction, the outer peripheral portion is made larger and the central portion is made smaller. As a structure in which the aperture ratio is made larger at the outer periphery and the center portion is made smaller, the pitch and diameter of the holes are made the same as in the perforated plate 11 of the embodiment shown in FIG. Alternatively, a large number of portions having no hole at the center may be distributed, or the pitch of the holes may be the same, the diameter of the hole provided at the outer periphery may be increased, and the diameter of the hole provided at the center may be reduced. Alternatively, the diameter of the holes may be the same, and the pitch of the holes may be made smaller at the outer periphery and larger at the center.

The guide plate 12 is provided at the outer peripheral portion of the opening to direct the air at the outer peripheral portion blown out from the perforated plate 11 having a larger opening ratio at the outer peripheral portion and a smaller central portion.
The air at the center is guided by the air at the outer periphery where the flow rate and the flow velocity are large, and arrows 32 representing the flow velocity and direction in FIG.
32,..., The direction is regulated. The guide plate is
When the area of the blow-out opening is large, or when the distance to the supply position is long, the guide plate is lengthened in the flow direction, or a double guide plate is provided at an appropriate distance from the center. Then, the regulation of the flow direction may be appropriately strengthened.

According to the blowing chamber 1 of the present embodiment, the supply target 2 which is separated from the supply position 21 by a distance.
Air can be evenly supplied to the entire supply range 22 of 0 as indicated by arrows 32, 32,...

[0016]

According to the present invention, a perforated plate having a larger opening ratio at the outer peripheral portion and a smaller central portion is provided on the opening surface of the blowing chamber. Since the air can be uniformly supplied to the supply range by erected, the temperature distribution of the supply target can be stabilized, and more precise control can be performed. In addition, since a grill for providing a wind direction plate over the front surface of the opening surface of the chamber is not used, the structure can be simplified and lightweight, and the cost can be reduced.

Furthermore, since the air blown out from the blowing chamber can be intensively supplied to the supply target without diffusing to the surroundings, it can be applied to a larger supply target.
If the work efficiency can be improved and the required capacity is the same, the amount of air blown out by adjusting the temperature and humidity can be reduced, and the energy consumption can be reduced.

[0018]

[Brief description of the drawings]

FIG. 1 shows a schematic configuration diagram of the present invention.

FIG. 2 is a diagram showing details of an embodiment according to the present invention.

FIG. 3 is a diagram illustrating an air flow according to an embodiment of the present invention.

FIG. 4 is a diagram showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Blowing chamber 11 Perforated plate whose opening ratio was made larger at the outer periphery and made smaller at the center 12 Guide plate 13 Air inlet 20 Supply target 21 Supply position 22 Supply range 31 Spread of air 32 Arrow indicating flow velocity and direction 50 Constant temperature Constant-humidity air supply device 101 Perforated plate 102 Grill 200 Device to be supplied

Claims (1)

[Claims] 1. An air blow-off chamber connected to an air supply device for supplying air to a supply subject with a regulated flow velocity and direction, wherein the air blows out of a blow-off chamber opposed to the supply position at a distance. On the opening surface, a perforated plate having an opening ratio large in the outer peripheral portion and small in the central portion is provided, and a guide plate parallel to the blowing direction is erected on the outer peripheral portion of the outlet opening surface on the downstream side of the perforated plate. Air blowing chamber.