JPH0791731A - Air ventilation unit - Google Patents

Abstract

PURPOSE:To obtain an air ventilation unit which has a simple construction and prevents the temperature distribution in a room equipped with a floor air outlet type air conditioner from becoming uneven. CONSTITUTION:A ceiling is build by combining air ventilation units 20. The air ventilation unit 20 has a top panel 22 that faces the inside of a room and has air vent holes 22a. A liftable plate 22a is provided parallel with the outdoor side of the top panel 22 and the distance between the liftable plate 22a and the top panel 22 is variable. The liftable panel 24 has air vent holes 24a that are arranged at positions horizontally slipping a little out of the places of the opposite air holes 22a of the top panel 22. Lifting members 26 using shape memory alloy are arranged between the top panel 22 and the liftable panel 24. The lifting member 26 is flat in shape as shown in the figure (a) when the room temperature is low, so that the ventilation rate is low as the liftable panel 24 cones close to the top panel 22. On the other hand, when the room temperature is high, it turns into a form having an arc-shaped cross section as shown in the figure (b), so that the ventilation rate becomes high as the liftable panel 24 comes away from the top panel 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation unit such as a ventilation plate, and more particularly to a ceiling of a room equipped with a floor blowing air conditioner, a floor of a room equipped with a ceiling blowing air conditioner, or a ceiling of a computer casing. The present invention relates to a ventilation unit suitable for use as a plate or the like.

[0002]

2. Description of the Related Art In recent years, in order to rationalize office work operations in offices, so-called office automation has been progressing in which offices are operated by using computers. This OA
For the purpose of commercialization, each building has a large OA such as a computer room.
A dedicated room for handling equipment is prepared, and OA equipment is widely used in general offices. In order to facilitate the wiring of these OA equipment and increase the degree of freedom in arranging the OA equipment, the floor of the computer room, the OA room, etc. has a double floor structure having a building base and a floor panel. That is, a floor such as an OA room is formed above the building base at appropriate intervals from the building base.

By the way, since OA equipment generates heat when used, the room temperature of the OA room or the like rises, and it may be difficult to maintain a comfortable working environment for the operator. For this reason, a floor blowing air conditioner is installed in the OA room or the like. That is, an air outlet is arranged at an appropriate position on the floor panel, an air conditioner is arranged outside the OA chamber, and conditioned air is discharged from the air conditioner into a space below the floor panel, This conditioned air is blown out into the room from the air outlet. Air conditioning of the room is performed by this conditioned air, and the air flows out from the room through a vent provided in the ceiling,
It is sucked into the air conditioner.

[0004]

However, although the floor blowout air conditioner described above air-conditions the entire room, the room temperature may be unevenly distributed depending on the arrangement of the indoor equipment. That is, when the air in the room flows out from the ceiling to the outside of the room, the air is exhausted almost uniformly from any vent regardless of whether the room temperature is high or low.
Ventilation may be insufficient in areas near the heat sources such as equipment where the temperature has risen, resulting in insufficient air conditioning. For this reason, the temperature around the indoor heat source is constantly high, which not only does not maintain a comfortable working environment, but also may affect the operation of the OA equipment in the room.

As a means for solving this, a structure in which a temperature sensor is arranged at an appropriate position in the room and a blower fan is arranged at the blowout port of the floor panel can be considered. According to this structure, the temperature distribution in the room is obtained from the detection result of the temperature sensor, and the blowing amount by the blowing fan is controlled according to the temperature distribution, or the conditioned air supplied from the air conditioner is controlled. By changing the temperature, the room temperature can be brought into a uniform state with no rise or fall. However, in this structure, noise may be generated due to the operation of the blowing fan, and design problems such as duct dimensions may occur. Also,
If the heat sources are unevenly distributed in the room, it may not be possible to cope with the situation, and there may be an excess or deficiency of air conditioning, or the temperature distribution may not be made uniform enough.

On the other hand, an exhaust fan is provided in the ventilation hole of the ceiling, and the exhaust fan is controlled based on the temperature distribution detected by the temperature sensor to adjust the amount of exhaust from the ceiling so that the room temperature becomes uniform. Can be realized. However, in order to realize this structure, individual exhaust fans, regulators, actuators, dampers, etc. are required, and the equipment becomes complicated and large-scaled, and it is difficult to realize from the viewpoint of cost, weight, construction, etc.

Further, not only in the OA room equipped with the floor air conditioner, but also in the clean room equipped with the ceiling air conditioner, the same temperature distribution in the room may occur.

Therefore, an object of the present invention is to provide a ventilation unit having a simple structure, which prevents uneven temperature distribution in a room equipped with a floor blow-out air conditioner or the like.

[0009]

In order to achieve the above-mentioned object, a ventilation unit according to the present invention comprises a fixed plate having a ventilation hole, a movable plate having a ventilation portion, and a position of the movable plate which changes depending on temperature. And a moving means for changing the temperature, and the moving means moves the movable plate by a change in temperature,
This movement changes the amount of air flowing through the ventilation hole of the fixed plate and the ventilation portion of the movable plate.

[0010]

[Function] When the ventilation unit is used for the indoor exhaust port,
When the room temperature is close to the target value for air conditioning, a fixed amount of air flows between the ventilation hole of the fixed plate and the ventilation portion of the movable plate to exhaust the room.

When the room temperature changes, the moving means is actuated to move the movable plate. As a result, the positional relationship between the ventilation hole of the fixed plate and the ventilation portion of the movable plate is changed, and the resistance when air flows through the ventilation hole and the ventilation portion is changed. Then, the amount of air flowing through the ventilation hole and the ventilation portion is changed, and the exhaust amount in the room is changed.

When the room temperature again approaches the target value due to the change of the exhaust amount, the moving means is operated, the movable plate is moved, and the amount of air flowing through the ventilation hole and the ventilation portion is changed. Becomes the above-mentioned fixed amount.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The ventilation unit according to the present invention will be specifically described below based on the illustrated embodiments. In this embodiment, the case where the ventilation unit is used for the ceiling of an OA office will be described.

As shown in FIG. 2, the lower base 12 and the upper base 14 of the OA office 10 are formed by concrete slabs, and the ceiling 16 of the OA office 10 is positioned at a suitable distance from the upper base 14. And a ceiling space 18 is formed between the ceiling 16 and the upper base 14.

The ceiling 16 is constructed by combining an appropriate number of ventilation units 20. The ventilation unit 20 is shown in FIG.
As shown in (a), it has a surface plate 22 as a fixed plate having a substantially flat plate shape and a flange portion formed on the peripheral edge side.
The surface plate 22 faces the indoor side of the OA office 10 and has an appropriate number of ventilation holes 22a.

An elevating plate 24 having a substantially flat plate shape is disposed as a movable plate on the outside of the surface plate 22 substantially in parallel with the surface plate 22. The elevating plate 24 is movable with respect to the surface plate 22. It is freely approachable and separated. A ventilation hole 24a is formed in the lift plate 24 as a ventilation portion.
The a is provided at a position slightly offset in the horizontal direction from the facing vent hole 22a of the surface plate 22.

An elevating member 26 as a moving means formed of a shape memory alloy is arranged between the surface plate 22 and the elevating plate 24, and the elevating member 26 has a shape of OA.
It changes according to the room temperature of the office 10. That is, when the room temperature is lower than a predetermined temperature, as shown in FIG. 1A, the elevating member 26 has a substantially flat plate shape, and the surface plate 22 and the elevating plate 24 are close to each other. There is. On the other hand, when the room temperature is higher than the above predetermined temperature, FIG.
As shown in, the elevating member 26 has a substantially arcuate cross section, and the elevating plate 24 is separated from the surface plate 22.

Further, as shown in FIG. 2, the lower base 12
A floor 28 that constitutes the floor of the OA office 10 is disposed at a position appropriately spaced from the floor 28 and the floor 28 and the lower base.
An underfloor space 29 is formed between the space 12 and the space 12. The floor 28
Is formed by combining an appropriate number of floor panels 28a, and an outlet 28b is formed at an appropriate position on the floor panel 28a.

Further, an air conditioner 30 is provided outside the office office 10, and the outlet of the air conditioner 30 is disposed.
30a is directed to the underfloor space 29, and the suction port 30b is directed to the ceiling space 18.

The operation of the ventilation unit 20 according to this embodiment described above will be described.

As shown in FIG. 2, during air conditioning, conditioned air is blown out from the discharge port 30a of the air conditioner 30. This conditioned air is supplied to the underfloor space 29 of the OA office 10 and blown out into the room from the air outlet 28b of the floor 28. Then, the conditioned air is used to air-condition the room.

In the room, the OA equipment is cooled by the conditioned air blown from the outlet 28b,
The air rises and flows out of the room from the ventilation unit 20 of the ceiling 16.

At this time, when the room temperature is lower than a predetermined temperature, as shown in FIG. 1 (a), since the elevating member 26 of the ventilation unit 20 has a substantially flat plate shape, the elevating plate 24 is a surface plate. Close to 22. Therefore, there is a large resistance when the indoor air circulates through the ventilation holes 22a of the surface plate 22 and the ventilation holes 24a of the lift plate 24 and is vented to the outside, and the indoor air is restricted from each ventilation unit 20. A certain amount of air will be exhausted, and the indoor ventilation will be performed almost uniformly regardless of the location.

As shown in FIG. 2, the air discharged to the outside is circulated through the ceiling space 18 of the OA office 10 and is sucked through the suction port 30b of the air conditioner 30.

By the way, in the room of the OA office 10, the room temperature may be locally raised due to the arrangement of OA equipment. At this time, the air having a temperature higher than that of the air that is normally exhausted is exhausted from the ventilation unit 20 arranged above the place where the room temperature is high.

Therefore, as shown in FIG. 1B, the elevating member 26 is deformed by the high temperature air, the elevating member 26 pushes up the elevating plate 24, and the elevating plate 24 is separated from the surface plate 22. . Thereby, the ventilation hole 22a of the surface plate 22 and the lifting plate 2
The distance between the air holes 24a of 4 is widened, the resistance when the air is circulated is reduced, and more air is discharged than usual.

When the amount of air circulated by the ventilation unit 20 increases, more hot air is exhausted than low temperature air in the room. For this reason,
A large amount of air is ventilated around the heat source, local temperature rise can be prevented, and the temperature distribution in the room becomes almost uniform.

When a large amount of high-temperature air is exhausted and the room temperature is lowered, as shown in FIG.
The weight of 24 deforms the elevating member 26 into a substantially flat plate shape, and the amount of air circulation is reduced. This allows the air in the room to be ventilated again almost uniformly regardless of the location.

It should be noted that when the temperature drops, the lifting member
It is desirable that the elevating plate 24 be configured to apply a biasing force to the elevating plate 24 so that the elevating plate 24 approaches the surface plate 22 so that the plate 26 is deformed into a substantially flat plate shape. For example, a structure in which a pressing force of a spring (not shown) is biased may be considered.

According to this embodiment, the ceiling of the OA office 10
Since the ventilation unit 20 is used for 16, the conditioned air that has become hot and floats above can be efficiently exhausted. That is, since the exhaust volume of only the ventilation unit 20 that exhausts the conditioned air that has become locally high in temperature is increased, it is possible to increase the temperature of the high temperature without exhausting a large amount of the low temperature conditioned air flowing through the other ventilation units 20. Only air can be well ventilated.

Further, since the lifting member 26 is made of a shape memory alloy, the lifting plate 24 can be lifted and lowered with a simple structure. Therefore, the manufacturing is easy and the equipment cost is low.

Further, according to this embodiment, the position where the vent hole 24a is formed in the lift plate 24 is a position which is slightly offset in the horizontal direction from the vent hole 22a of the surface plate 22 which faces the vent hole 24a. Therefore, the flow resistance is greatly changed due to a large change in the flow resistance due to the proximity or separation of the elevating plate 24. Therefore, the ventilation amount can be sufficiently controlled even if the lifting amount of the lifting plate 24 by the lifting member 26 is small, so that the lifting member 26 can be easily manufactured.

In this embodiment, the elevating plate 24 has a structure in which the ventilation amount is adjusted by moving the elevating plate 24 close to or away from the surface plate 22, but the elevating plate 24 can be slid horizontally. As a structure, the amount of ventilation may be increased or decreased by sliding on the surface plate 22.
According to this structure, since the size of the vent hole can be finely adjusted, the flow rate can be accurately controlled.

In this embodiment, the elevating plate 24 is provided with a proper number of ventilation holes 24a as ventilation portions, but the ventilation holes 24a may have any appropriate arrangement, shape, quantity and the like. I do not care. Here, the structure may be such that the ventilation holes 24a are not provided, and the air flows around the elevating plate 24. Therefore, an appropriate design can be performed according to conditions such as the position where the ventilation unit 20 is attached and the ventilation amount thereof.

Further, in this embodiment, the structure in which the ventilation amount is increased when the temperature rises has been described, but a structure other than this may be used. For example, there may be a structure in which the air flow rate is reduced as the temperature rises, or a structure in which the air flow rate is increased or decreased as the air temperature drops.
These structures can be obtained by appropriately designing the shape of the ventilation part of the elevating plate 24, the shape and mechanism of the elevating member 26, and the like.

By the way, in this embodiment, the OA office 10
Although the structure in which the ventilation unit 20 is used for the ceiling 16 has been described, it can be used in other places. For example, a structure used for the floor of a clean room in which conditioned air blows out from the ceiling can be considered.

As shown in FIG. 3, a ceiling 34 of the clean room 32 is formed at an appropriate distance from the upper base 14, and the ceiling 34 is constructed by combining a filter 36. A floor portion 38 is formed on an upper portion of the lower base 12, and the floor portion 38 has a grating floor 40 at an upper portion and a ventilation unit 20 at a lower portion. An air conditioner 30 is arranged outside the clean room 32, and a discharge port 30a of the air conditioner 30 points to the ceiling space 18 and a suction port 30b points to the underfloor space 29.

According to this structure, the outlet of the air conditioner 30
The conditioned air is blown from the ceiling 30a to the ceiling space 18, and the conditioned air is filtered by the filter 36 and blown from the ceiling 34 into the room. And the air in the room is the grating floor 40.
And is discharged from the ventilation unit 20. This air is exhausted to the underfloor space 29 and sucked into the air conditioner 30.

Therefore, when the temperature around the heat source in the room rises, the ventilation amount of the ventilation unit 20 arranged therebelow is increased, and more hot air is exhausted.
The room temperature can be lowered to an appropriate value.

Further, the ventilation unit 20 can be used as a top plate of a computer main body.

As shown in FIG. 4, a computer 42 is arranged in a room equipped with an air conditioner for blowing out conditioned air from the underfloor space 29 into the room.
A portion where 42 is arranged is a grating floor 46.
The top plate 48 of the computer 42 is constructed by properly combining the ventilation unit 20.

According to this structure, the conditioned air blown out from the underfloor space 29 cools the computer 42 and is exhausted from the ventilation unit 20. As a result, the computer 42, which generates a particularly large amount of heat in the room, can be centrally air-conditioned, and at that time, the amount of exhaust gas can be adjusted according to the deviation of the heat generation position inside the computer 42. Therefore, the air conditioning of the computer main body can be performed more effectively.

[0043]

As described above, according to the ventilation unit of the present invention, it is composed of the fixed plate, the movable plate and the moving means, and no power is required to change the ventilation amount. Is easy and doesn't get complicated. Therefore, as compared with a structure in which the room temperature is detected by a temperature sensor or the like and the output of the exhaust fan is changed to change the exhaust amount, it can be installed more easily and the equipment cost is lower.

Further, since the moving means moves the movable plate according to the change of the room temperature and the ventilation amount of the ventilation hole of the fixed plate and the ventilation portion of the movable plate is changed, the temperature of the room air changes to the temperature. A large amount of air is ventilated in the part where the temperature is generated, and the temperature distribution becomes almost uniform. For this reason, if there is a heat source in the room, the amount of ventilation around it will increase,
The room temperature becomes almost uniform, and a comfortable working environment can be obtained at any position in the room.

Further, a floor or a ceiling can be constructed by combining a large number of ventilation units. In this case, since the ventilation amount can be changed for each ventilation unit, the ventilation in the room can be performed finely. Therefore, the temperature distribution in the room can be made uniform without waste, which contributes to energy saving.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a ventilation unit according to the present invention, where (a) shows a case where the room temperature is low, and (b) shows a case where the room temperature is high.

FIG. 2 is a schematic side view showing a state in which the ventilation unit according to the present invention is used for a ceiling.

FIG. 3 is a schematic side view showing a state in which the ventilation unit according to the present invention is used for a floor portion.

FIG. 4 is a schematic side view showing a state in which the ventilation unit according to the present invention is used for a top plate of a computer.

[Explanation of symbols]

 10 OA office 16 Ceiling 20 Ventilation unit 22 Surface plate (fixed plate) 22a Vent hole 24 Lift plate (movable plate) 24a Vent hole (vent part) 26 Lifting member (moving means) 32 Clean room 38 Floor part 42 Computer 48 Top plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F24F 13/10 E

Claims (1)

[Claims] 1. A fixed plate having a ventilation hole, a movable plate having a ventilation portion, and a moving means for changing the position of the movable plate according to a temperature change, wherein the moving means causes the movable plate to move. And the amount of air flowing through the ventilation hole of the fixed plate and the ventilation portion of the movable plate is changed by this movement.