JP2003322356A - Air-conditioning system blowing air from floor and air- conditioning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low cost and energy-saving an air-conditioning system blowing air from a floor capable of skeleton heat storage, and an air- conditioning method. <P>SOLUTION: A double floor chamber 21 is formed under a floor. When air- conditioning an air-conditioning area 10 where a ceiling return air chamber 23 is formed on a ceiling, the air supplied into the double floor chamber 21 from an air conditioner 29 is sent into the ceiling return air chamber 23 through a duct 60 without passing the air-conditioning area 10 before air-conditioning the air-conditioning area 10. Thereby, the double floor chamber 21 and the ceiling return air chamber 23 can reserve heat quickly and in saving energy. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor blowing air conditioning system and an air conditioning method.

[0002]

2. Description of the Related Art Conventionally, a floor blow-out type air conditioner has been used in which conditioned air is supplied from an underfloor double-floor chamber to an air-conditioned area and the air in the air-conditioned area is discharged to a ceiling return air chamber. There is. This floor blowing method is an air-conditioning method that is suitable for thermal characteristics, is economical, has the advantages that it is easy to move the blowing outlet and adjust the air volume, and easy to maintain.

[0003]

In the floor blowout method, the surface area of the skeleton with which the conditioned air comes into contact is large, and the temperature of the blowout rises or falls due to heat exchange with the skeleton. Therefore, by storing heat in the double floor chamber in advance before air conditioning the air conditioning area, it is possible to supply air of a more uniform temperature to the air conditioning area from the entire floor. Also,
By storing heat in the ceiling return air chamber in advance, it is possible to reduce thermal energy when the temperature of the air discharged into the ceiling return air chamber is adjusted by an air conditioner and supplied again from the double floor chamber to the air conditioning area. become.

However, as shown in FIG. 11, in order to store heat in the double floor chamber 100 by circulating air between the air conditioner 101 and the double floor chamber 100 on one side of the double floor chamber 100. Then, the conditioned air is spread only to a certain range of the outlet 102, and it is difficult to spread the air from the air conditioner 101 to the entire double floor chamber 100, and it is difficult to store heat over the entire floor. . In addition, even if heat is stored in the entire double-bed chamber, if the heat stored in the peripheral portion of the double-bed chamber during heat dissipation (during air conditioning operation) is not used, the heat is effectively used. It doesn't happen.

On the other hand, if heat is stored not only in the double floor chamber but also in the ceiling return air chamber, the heat storage capacity can be further increased. However, when trying to store heat in the ceiling return air chamber, the ceiling beam becomes an obstacle to air flow, and it is difficult to increase the body heat storage amount. In addition, generally, the exhaust port to the exhaust fan to promote ventilation in the air-conditioning area is provided in the back of the ceiling, and the excess outside air of the return air cooled or heated by the ceiling slab during heat dissipation operation is exhausted to the outside. Therefore, the heat storage ineffective component is generated.

When heat is stored in either the double floor chamber or the ceiling return air chamber, if the heat storage time becomes long, the amount of heat released to the air-conditioning area during heat storage increases, and heat storage efficiency deteriorates. Therefore, it is preferable to efficiently store heat in the body in a short time.

An object of the present invention is to increase the body heat storage amount,
Moreover, it is an object of the present invention to provide a floor blowout air conditioning system and an air conditioning method capable of efficiently storing heat and releasing heat.

[0008]

In order to achieve this object, in the present invention, in a floor blowout air conditioning system in which a double floor chamber is formed under the floor in an air conditioning area and a ceiling return air chamber is formed on the ceiling. ， At the periphery of the double floor chamber, which is farthest from the air supply position from the air conditioner into the double floor chamber, air is extracted from the double floor chamber and the air is not passed through the air conditioning area. A duct for sending air into the ceiling return air chamber is installed, and an opening / closing damper is installed to control the air blown through this duct.

Further, according to the present invention, when the air-conditioning area in which the double floor chamber is formed under the floor and the ceiling return air chamber is formed above the ceiling, before the air conditioning area is air-conditioned, the double floor is removed from the air conditioner. The air supplied into the chamber is sent to the ceiling return air chamber without passing through the air-conditioning area, and heat is stored in the double floor chamber in advance.

In this case, when heat is stored in the double-bed chamber in advance, the double-bed chamber is located at the peripheral edge of the double-bed chamber at a position farthest from the air supply position from the air conditioner into the double-bed chamber. It is advisable to extract the air from the floor chamber and send the air into the ceiling return air chamber without passing through the air conditioning area.
Such air circulation is performed by forced ventilation, but specifically, a fan built into the air conditioner or a circulation fan separately attached to the duct may be used.

In the perimeter zone, air may be extracted from the double floor chamber and sent to the ceiling return air chamber. In that case, a replacement ventilation chamber may be arranged in the perimeter zone, and air may be sent into the ceiling return air chamber via the replacement ventilation chamber.

According to the present invention, before air conditioning the air-conditioned area,
By opening the open / close damper, the air supplied from the air conditioner into the double floor chamber is sent to the ceiling return air chamber without passing through the air conditioning area, and the double floor chamber and the ceiling return air chamber also store heat in advance. Will be able to. Further, since the air is directly supplied into the ceiling return air chamber without passing through the air-conditioning area, the double floor chamber and the ceiling return air chamber can quickly store heat, and the heat storage amount of the entire body can be increased. It is possible. Furthermore, by sucking the underfloor air from the lower end of the floor during heat storage, the wind speed over the entire floor can be increased, and heat can be stored efficiently because the convective heat transfer coefficient on the surface of the body increases.

When heat is stored in this manner, the double-bed chamber is located at the peripheral portion of the double-bed chamber and at the position farthest from the air supply position from the air conditioner into the double-bed chamber. By extracting air from inside, the air supplied from the air conditioner into the double floor chamber is passed through the double floor chamber over a wide range, and then sent into the ceiling return air chamber through the duct. be able to. By this,
The double-bed chamber can store heat over a wide range to increase the amount of heat storage.

Further, the duct may extend across the inside of the ceiling ventilation chamber, and the outlet of the duct may be provided in each span of the ceiling beam provided in the ceiling return air chamber. By providing duct outlets on each span of the ceiling beam in this way, heat can be efficiently stored on the ceiling slab surface. In this case, the air supplied from the air conditioner into the double-floor chamber is blown out along the ceiling slab surface from the outlet of the duct, and the Coanda effect is used to attach the blowing jet to the ceiling slab surface to store heat. The wind speed on the surface of the body can be increased over a wide range, and the convective heat transfer coefficient is increased, so that heat can be stored in the body more efficiently.

Further, during air conditioning operation (during heat dissipation operation), it is advisable to exhaust excess air exhausted from the outside through the upper portion of the perimeter window where heat load is concentrated. By doing so, it is possible to reduce the load on the perimeter and at the same time prevent the exhaust air from being cooled (heated) by the ceiling slab and reduce the loss of heat storage energy.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a floor blowing air conditioning system (hereinafter, “air conditioning system”) 1 according to an embodiment of the present invention.

The inside of the room 10, which is the air-conditioned area, is located below (floor 2
The living space 8 is from 0 to a height of about 1.8 m),
A non-residential space 9 is located above the residential space 8.
In the living space 8, a task area (work area) 13 in which a worker 11 operates the OA equipment 12 and the like, and an ambient area 14 surrounding the task area 13 are formed. In the illustrated example, each work space 1 existing in the task area 13
A plurality of partitions 16 are installed so as to partition 5 from each other. Then, a part of the partitions 16 of the plurality of sheets is arranged at a position to partition the task area 13 and the ambient area 14. Also, each partition 1
Openings 17 are provided at the foot portions of 6 respectively.

A double floor chamber 21 is formed below the floor 20 of the chamber 10 (under the floor), and a ceiling return air chamber 23 is formed above the ceiling 22 of the chamber 10 (behind the ceiling). In addition, one side surface of the chamber 10 (in the example shown in FIG. 1, the chamber 10
An air conditioning machine room 25 is formed on the right side surface of the. The air conditioning machine room 25 includes a filter 26, a heat exchanger 27, a fan 28, and a humidifier (not shown) and the like.
9 are installed. A return air duct 30 and an outside air intake duct 31 are connected to the air conditioner 29. By operating the air conditioner 29, the return air RA taken from the ceiling return air chamber 23 and the outside air OA are mixed to filter dust.
The temperature control and the humidity control are performed, and the generated supply air SA is sent to the double floor chamber 21 and supplied to the chamber 10.

The floor 20 of the room 10 is provided with a floor outlet 35 for supplying air (air supply SA) for performing task air conditioning to each work space 15 existing in the task area 13. As described above, the air conditioner 29 filters the dust, controls the temperature and the humidity, and supplies the supply air SA to the double-bed chamber 21, so that the inside of the double-bed chamber 21 becomes a positive pressure and the floor outlet 35 is discharged. The supply air SA is blown upward through the work space 15 and blows from below into each work space 15 existing in the task area 13.

As shown in FIG. 1, each work space 15 existing in the task area 13 is provided with a controller 36 for adjusting the air volume of the supply air SA blown upward from each floor outlet 35. is there. If the cold or warm air supplied to the task area 13 is insufficient, the worker 11
Operates the controller 36 to increase the air volume, and conversely, in the case of excessive supply, the air volume may be reduced.

FIG. 2 is a plan view of the double floor chamber 21. One peripheral portion of the double floor chamber 21 (in the example shown in FIG. 2, the right peripheral portion of the double floor chamber 21) is connected to the lower end of the air conditioning machine room 25 described above. In this way, one peripheral portion of the double floor chamber 21 connected to the lower end of the air conditioning machine room 25 is the air supply position from the air conditioner 29 to the inside of the double floor chamber 21. The temperature-controlled supply air SA is supplied into the double-bed chamber 21 from one peripheral portion of the double-bed chamber 21. In this way, the supply air SA supplied into the double floor chamber 21 collides with the diffusion plate 40 arranged inside the double floor chamber 21 and diffuses, so that the supply air SA is evenly distributed throughout the entire interior of the double floor chamber 21.
Are being supplied. The height of the diffusion plate 40 is, for example, about half the height of the double floor chamber 21, and the diffusion plate 40 is disclosed in Japanese Patent Application Laid-Open No. 7-243665 previously disclosed by the applicant.
The same diffuser plate as that described in (Patent No. 3040910) can be adopted.

A position on the peripheral portion of the double-bed chamber 21 that is farthest from one peripheral portion (right peripheral portion) which is a position for supplying air from the air conditioner 29 into the double-bed chamber 21 (shown in FIG. 2). In the example, the left peripheral portion of the double-bed chamber 21) is provided with an opening 41 for supplying the supply air SA in the double-bed chamber 21 to the replacement ventilation chamber 55 described later. As a result, air is extracted from the inside of the double floor chamber 21 through the opening 41 at the position (left peripheral portion) farthest from the air supply position (right peripheral portion) from the air conditioner 29 into the double floor chamber 21. You can do it. In the illustrated example, an opening 41 for extracting the supply air SA from the double floor chamber 21 is also provided in the other peripheral edge portion (upper and lower peripheral edges in FIG. 2) of the double floor chamber 21. As described above, part of the supply air SA supplied into the double floor chamber 21 is directed upward to the task area 13 through the floor outlet 35 provided in the floor 20 of the room 10 during air conditioning such as daytime. The rest is blown and the rest passes through the openings 41 provided in each peripheral portion of the double-bed chamber 21 and the respective replacement ventilation chambers 55.
To be supplied to.

FIG. 3 shows a state in which the wall surface of the room 10 (the side wall surface where the air-conditioning machine room 25 is not formed on the back, which is the perimeter zone in this embodiment) is viewed from the inside of the room 10. . In the illustrated example, a window 50 is provided on the wall surface of the chamber 10, pillar covers 51 are formed on both left and right sides of the window 50, and a peri-counter 52 is provided below the window 50. The front surface of the peri-counter 52 is formed as a ventilation surface 53 that supplies the supply air SA toward the lower part in the chamber 10.

FIG. 4 is an explanatory diagram of the inside of the peri-counter 52. A displacement ventilation chamber 55 is installed inside the peri-counter 52. In the illustrated example, the replacement ventilation chamber 55 is installed inside the peri-counter 52 provided at the lower part of each wall except the wall on the side of the building where the air-conditioning machine room 25 is formed in the back. The replacement ventilation chamber 55 is arranged in the ambient area 14 formed around the task area 13 inside the.

A large number of air supply ports 56 are opened on the front surface (the surface facing the inside of the chamber 10) of the displacement ventilation chamber 55, and as described above, through the opening 41 from the inside of the double floor chamber 21. The supply air SA supplied to the replacement ventilation chamber 55 is
The air is supplied from the air supply port 56 to the front surface of the replacement ventilation chamber 55. The supply air SA thus supplied from the replacement ventilation chamber 55 further passes through the ventilation surface 53 on the front surface of the peri-counter 52 (the surface facing the inside of the chamber 10),
It is supplied to the ambient area 14 in the chamber 10. The ventilation surface 53 is attached for design purposes, and is provided at substantially the same position as the air supply port 56.

As shown in FIG. 5, a plurality of fins 57 are attached to each air supply port 56 that is open on the front surface of the replacement ventilation chamber 55. A support member 58 is provided at the center of each air supply port 56, and the fins 57 are radially attached around the support member 58 at appropriate equal intervals. The ambient area 14 in the room 10 from each air supply port 56
The fins 57 are arranged so as to be inclined with respect to the central axis of the air supply port 56 in order to impart a swirling component to the air supply SA supplied toward the air supply port 56. And the air supply port 5
When supplying the supply air SA from 6 to the ambient area 14 through the ventilation surface 53 on the front surface of the peri-counter 52, each fin 5
By forcibly flowing along the line 7, a swirling component is given to the supply air SA.

As shown in FIG. 6, in the case of the air supply ports 56 arranged side by side, the turning directions of the air supply SA discharged from the air supply ports 56 adjacent to each other have the same rotational direction. However, in the case where the air supply ports 56 are arranged vertically, the air supply ports 56 are arranged so that the swirling directions of the air supply SA discharged from the adjacent air supply ports 56 are in opposite rotational directions. The direction of the fins 57 attached to 56 is set. As a result, the supply air S that is discharged while swirling from each supply port 56
A has the same motion direction that spreads to the left and right, and spreads laterally without being offset.

As shown in FIG. 4, a duct 60 is erected beside the peri-counter 52 so as to be able to communicate with the peri-counter 52. The duct 60 is disposed inside the pillar cover 51, for example, in contact with the pillar cover 51 shown in FIG. 3 (however, in FIG. 1, the duct 60 is shown outside the window 50 for the sake of explanation), It communicates with the ceiling return air chamber 23 in the ceiling. A bypass pipe 62 that communicates with the replacement ventilation chamber 55 via an opening / closing damper 61 is connected to the lower end of the duct 60. An opening 64 is formed at the lower end of the duct 60 so as to open into the peri-counter 52 via another opening / closing damper 63.

On the upper surface of the peri-counter 52, there is provided a slot 65 for allowing cold draft generated in the perimeter zone (the vicinity of the window 50 in the chamber 10) to flow down into the peri-counter 52 in the winter, for example. The opening is formed in the full width of 52 (approximately the same as the width of the window 50). The slot 65 is arranged below the perimeter zone along the window 50. As shown in FIG. 1, inside the peri-counter 52, there is provided a temperature sensor 66 for detecting that the cold draft has flowed into the peri-counter 52.

A fan 70 is connected to the end of the duct 60. When the opening / closing damper 61 is opened and the fan 70 is operated, the air supply SA in the double floor chamber 21
Can be sent directly into the ceiling return air chamber 23 through the replacement ventilation chamber 55, the opening 41 and the duct 60 without passing through the room 10 which is an air-conditioned area. Further, for example, in the winter season, when a cold draft generated in the perimeter zone flows down from the slot 65 into the perimeter counter 52, the fan 70 is operated with the opening / closing damper 63 opened and the opening / closing damper 61 closed. As a result, the cold draft flowing down into the peri-counter 52 can be forcibly sent into the ceiling return air chamber 23 from the opening 64 through the duct 60.

The ceiling 22 of the chamber 10 is provided with an intake port 75 for discharging the air in the chamber 10 into the ceiling return air chamber 23. By the operation of the air conditioner 29 described above, the return air RA is taken from the ceiling return air chamber 23 into the air conditioning machine room 25, so that the inside of the ceiling return air chamber 23 becomes a negative pressure and the room 1
Air at the ceiling level within 0 is returned to the ceiling return air chamber 23 through the intake port 75.

A slot 76 is formed above the perimeter zone for discharging hot air generated in the perimeter zone out of the chamber 10 in the summer, for example. The slot 76 is located across the width of the window 50 and above the perimeter zone. An exhaust fan 78 is connected to the upper portion of the slot 76 through a duct 77, and in order to prevent hot air from staying in the vicinity of the window 50 (perimeter zone) in the summer, for example, the exhaust fan 7
By the operation of 8, the ascending airflow is quickly sucked from the slot 76 and exhausted to the outside through the duct 77. As a result, the cold air that has been conditioned in the vicinity is drawn near the window 50, and the heat is relieved. The slot 76 is provided with a temperature sensor 80 for detecting an ascending air current generated by heating in the perimeter zone.

When the air-conditioning system 1 is operated, the opening / closing damper 61 described above with reference to FIG. 4 is opened and the fan 70 is operated before air-conditioning the inside of the room 10 which is the air-conditioning area. Then, by operating the air conditioner 29, the return air RA taken from the ceiling return air chamber 23 via the duct 30 is air-conditioned, and the created supply air SA is sent to the double floor chamber 21. In this way, as shown in FIG. 7, the air supply SA supplied from the air conditioner 29 into the double floor chamber 21 is supplied to the fan 70.
Suction of air from the replacement ventilation chamber 55 to the duct 60
Through the chamber 10 and forcedly sent to the ceiling return air chamber 23 without passing through the chamber 10. At this time, the floor outlet 35
If it is equipped with an opening / closing damper or shutter, it is better to close them. However, even if they are not provided, the amount of leakage of the supply air SA from the floor outlet 35 into the chamber 10 is small, so Ross can be ignored. Air conditioner 2
In FIG. 9, the outside air OA is not taken in from the outside air intake duct 31, only the return air RA is taken in through the return air duct 30 and the temperature is adjusted to make the supply air SA. It is good to send it to No. 21 for circulation.

In the air supply SA thus supplied to the double floor chamber 21, most of the air supply SA is forcibly extracted from the double floor chamber 21 through the duct 60 by the suction of the fan 70, and the floor outlet Almost no air was blown from 35, and the ceiling return air chamber 23 was not supplied to the chamber 10.
Will be sent inside. In this way, before the air conditioning in the room 10 which is the air conditioning area, the air supply SA supplied from the air conditioner 29 into the double floor chamber 21 is passed through the duct 60.
When the air is sent to the ceiling return air chamber 23 without passing through the room 10, the double floor chamber 21 is located at the position most distant from one peripheral portion which is the air supply position from the air conditioner 29 into the double floor chamber 21. It is preferable to extract air from the inside and supply it into the ceiling return air chamber 23 through the duct 60. For example, when the air conditioning machine room 25 is connected to the right peripheral edge of the double floor chamber 21 as in the example shown in FIG. 1, the replacement ventilation chamber 55 located at the left peripheral edge of the double floor chamber 21 is used. , Air is extracted from the inside of the double floor chamber 21 and the air is extracted through the duct 60 to the ceiling return air chamber 2
It is better to supply within 3. Then, in the double floor chamber 21, the supply air SA moves from the right side surface to the left side surface on the opposite side, so that the inside of the double floor chamber 21 extends from the right side surface to the left side surface. By heating or cooling with the supply air SA, it becomes possible to quickly store heat in the entire double-bed chamber 21.

Further, when the supply air SA is moved in the double floor chamber 21 in this way, the supply air SA collides with the diffusion plate 40 arranged inside the double floor chamber 21 and diffuses, The air SA flows from the right side surface to the left side surface in the double floor chamber 21 while spreading in the width direction of the double floor chamber 21. When the air conditioning system 1 is started, the air S is supplied to the entire interior of the double floor chamber 21.
Since A spreads quickly, the entire inner surface of the double-bed chamber 21 can be entirely heated or cooled in a short time.

As described above, the entire double floor chamber 21 is allowed to store heat, and at the same time, the air in the double floor chamber 21 is directly sent into the ceiling return air chamber 23 through the duct 60, whereby the ceiling return air chamber 23 Can also store heat in advance. In this case, since the air is directly supplied into the ceiling return air chamber 23 without passing through the room 10, the double floor chamber 21 and the ceiling return air chamber 23 can quickly store heat, and the heat storage amount of the entire body can be stored. Can be increased.

In this way, the double floor chamber 21 and the ceiling return air chamber 23 are heated or cooled as a whole, and after the heat is stored in the entire body, the opening / closing damper 61 is closed and the operation of the fan 70 is stopped to perform the preparatory operation. finish. Then, the operation of the air conditioning system 1 is started. That is, the air conditioner 2
The air supply SA created by air conditioning is sent to the double floor chamber 21 by the operation of 9. As a result, the inside of the double floor chamber 21 becomes positive pressure, and the supply air SA is passed through the floor outlet 35.
Are blown upward and are blown from below into each work space 15 existing in the task area 13 in the chamber 10. On the other hand, the supply air SA in the double floor chamber 21 is a peripheral portion of the double floor chamber 21 (a peripheral portion that is not connected to the lower end of the air conditioning machine room 25, and in FIG. It is also supplied to the replacement ventilation chamber 55 installed inside each peri-counter 52 in the chamber 10 through an opening 41 provided in the left side of the double floor chamber 21).
The supply air SA thus supplied to each replacement ventilation chamber 55
Is supplied to the ambient area 14 formed around the task area 13 inside the chamber 10 through the ventilation surface 53 on the front surface of the pericounter 52. In this case, the temperature change of the supply air SA inside the double floor chamber 21 is prevented by previously performing the preparatory operation as described above to preheat or cool the entire interior of the double floor chamber 21 with the supply air SA. Therefore, the supply air SA can be supplied to the task area 13 and the ambient area 14 at a stable temperature. Further, the supply air SA in the double floor chamber 21 is supplied to the floor outlet 3
Since it is supplied into the chamber 10 from both the 5 and the replacement ventilation chamber 55, the cold (warm) heat stored in the entire double-bed chamber 21 can be efficiently taken out.

Further, even when the supply air SA is supplied from the inside of the double floor chamber 21 into the chamber 10 through the floor outlet 35 provided in the floor 20 and the ventilation surface 53 in front of the peri-counter 52, Since the supply air SA collides with the diffusion plate 40 arranged inside the double floor chamber 21 and diffuses, the supply air S
A quickly spreads throughout the interior of the double floor chamber 21. As a result, the inside of the double floor chamber 21 is uniformly pressed, and the task area 13 and the ambient area 14 are transferred to the floor area 20 through the floor outlets 35 and the peri-counter 52 front ventilation surfaces 53. It is possible to supply the supply air SA evenly.

The floor outlet 3 provided on the floor 20
The supply air SA blown upward from 5 performs air conditioning (task air conditioning) on each work space 15 existing in the task area 13 in the room 10. In this case, the controller 36 arranged in each work space 15 is installed in the worker 11
Is operated, the air volume of the supply air SA blown upward from the floor outlet 35 of each work space 15 is adjusted, and individual control of each work space 15 existing in the task area 13 is also possible.

On the other hand, the supply air SA supplied from the replacement ventilation chamber 55 installed inside each peri-counter 52.
Passes through the ventilation surface 53 in front of the peri-counter 52,
It is supplied to the ambient area 14 within 0. In this case, the ventilation from the peri-counter 52 is preferably a displacement ventilation system that does not destroy the temperature stratification formed by the floor blowing. When the inside of the room 10 is in a temperature stratified state, it becomes possible to comfortably maintain the living area temperature at a higher supply air temperature as compared with the conventional mixed air conditioning. As a result, the temperature difference from the body can be increased, and the stored heat can be effectively extracted. Further, when supplying the supply air SA from the peri-counter 52 to the ambient area 14 in the chamber 10, the supply air SA is forced along the fins 57 attached to the respective supply ports 56 on the front surface of the replacement ventilation chamber 55. As a result, the swirling component is given to the supply air SA supplied from the supply air port 56 toward the ambient area 14. The air supply SA supplied to the ambient area 14 while turning in this manner is ejected from the air supply port 56 and then supplied to the ambient area 14 while entraining the surrounding air. Can be narrowed.

Thus, at the floor level in the room 10,
While performing the task air conditioning for the task area 13 and performing the displacement ventilation for the ambient area 14, the air at the ceiling level in the room 10 is ceilinged by the intake port 75 arranged in the ceiling 22 of the room 10. The return air chamber 23 is evacuated. A part or all of the air exhausted into the ceiling return air chamber 23 is returned to the return air R by the operation of the air conditioner 29.
A is taken into the air conditioning machine room 25, is mixed with outside air OA as appropriate, is air-conditioned by the air conditioner 29, and then is supplied with air SA again.
Is sent to the double floor chamber 21 and is supplied into the chamber 10 on the floor surface.

As described above, when the air is discharged from the chamber 10 into the ceiling return air chamber 23 and the air is sent from the ceiling return air chamber 23 to the air conditioner 29, the ceiling return air chamber 23 previously stores heat as described above. As a result, the cooling (heating) of the air supplied into the ceiling return air chamber 23 is prevented,
The air conditioner 29 uses the air that has been conditioned in the state where the energy loss is as small as possible, again as the supply air SA, and the double floor chamber 21.
Can be sent to.

When hot air is trapped in the perimeter zone in the summer, for example, the temperature sensor 80 detects the hot air and the exhaust fan 78 is operated to suck the hot air rising along the window 50. , Suction from the slot 76 provided in the ceiling 22 promptly, and the duct 77
Exhaust to the outside of the room 10 through. As a result, the stirring action in the upper part of the chamber 10 due to the rising air of the hot air generated in the perimeter zone can be obstructed, the flow-through load and the solar radiation heat generated in the perimeter zone can be reduced, and an increase in the interior load can be prevented. Further, by reducing the perimeter load and at the same time, sucking hot air and quickly exhausting it, it is possible to prevent the temperature of the ceiling return air chamber 23 from rising and to reduce the loss of heat storage energy.

When a cold draft occurs in the perimeter zone and flows down into the peri-counter 52 from the slot 65, for example, in winter, the temperature sensor 66 detects the cold draft and opens / closes the damper 63. And the fan 70 is operated so that the cold draft that has flowed into the peri-counter 52 is transferred from the opening 64 through the duct 60 to the ceiling return air chamber 23.
Force to send in. By receiving this cold air in the air conditioner, the cold draft generated in the perimeter zone can be quickly exhausted to the outside of the room 10, and the interior cooling amount can be reduced.

Although an example of the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment. For example, as shown in FIG.
From the above, a duct 60 for directly feeding the supply air SA into the ceiling return air chamber 23 is extended so as to cross the ceiling ventilation chamber 23, and a plurality of branch ducts 87 are vertically erected in the duct 60 in the ceiling return air chamber 23. These branch ducts 87 are connected to each other and provided at each span 86 corresponding to the ceiling beam 85 of the ceiling slab surface 23 'of the ceiling return air chamber 23, so that the branch ducts 87 open upward at the upper ends of the branch ducts 87. The discharge port 60 ′ may be provided in each span 86 of the ceiling beam 85 provided in the ceiling return air chamber 23.
By providing the discharge port 60 ′ of the duct 60 on each span 86 of the ceiling beam 85 in this way, the ceiling return chamber 23
The ceiling slab surface 23 'can efficiently store heat.

In this case, as shown in FIG.
The air blown out from the branch duct 87 through the discharge port 60 ′ at the upper end of the branch duct 87 is directed perpendicularly to each span 86 of the plurality of ceiling beams 85 formed on the ceiling slab surface 23 ′ of the ceiling return air chamber 23 and is replaced. The supply air SA supplied from the ventilation chamber 55 into the ceiling return air chamber 23 is supplied to the ceiling slab surface 2
Although it may be directly blown toward 3 ', as shown in FIG. 9, the outlet of each branch duct 87 connected to the duct 60 for directly feeding the supply air SA from the replacement ventilation chamber 55 into the ceiling return air chamber 23. 60 ′ is oriented parallel to the ceiling slab surface 23 ′ of the ceiling return air chamber 23, and the supply air S supplied from the replacement ventilation chamber 55 into the ceiling return air chamber 23.
By blowing A along the ceiling slab surface 23 ', the blowout jet may be attached to the ceiling slab surface 23' by utilizing the Coanda effect to store heat. By doing so, the wind velocity on the surface of the body can be increased over a wide range, and due to the increase in the convective heat transfer coefficient, the heat can be stored in the body more efficiently.

Further, as shown in FIG. 10, a plurality of branch ducts 87 are vertically erected and connected to a duct 60 for directly supplying the supply air SA from the replacement ventilation chamber 55 into the ceiling return air chamber 23, and each branch duct is connected. 87 The bottom surface of the conical guide member 90 is made parallel to the ceiling slab surface 23 'so as to face the discharge port 60' that is opened upward at the upper end, and the apex is the duct 6
It may be arranged so as to be oriented vertically to the discharge port 60 ′ of 0. As a result, the supply air SA supplied from the replacement ventilation chamber 55 into the ceiling return air chamber 23 is supplied to the guide member 90.
It can be forced to flow along the conical side of the duct 6
It becomes possible to give an attached jet flow that spreads radially along the ceiling slab surface 23 'with the discharge port 60' of 0 as the center. Then, the supply air SA can be blown in parallel to a wider area along the ceiling slab surface 23 '.

In addition, when the heat storage operation is performed in advance before air-conditioning the inside of the room 10 which is the air-conditioning area, the floor outlet 35 provided in the floor 20 can be removed from the floor outlet 35 even if the floor outlet 35 is not closed.
Although the leakage amount of the supply air SA into the inside is sufficiently small, it is more preferable to close the floor outlet 35. When air-conditioning the room 10,
In order to blow out the supply air SA from the floor outlets 35 to each work space 15, a fan may be attached to each floor outlet 35 instead of the above-mentioned pressure outlet method.

[0049]

According to the present invention, the double floor chamber and the ceiling return air chamber can be quickly stored in advance with a small amount of energy before the air-conditioning area is air-conditioned, and the heat storage amount of the whole body is increased. Is possible. As a result, it is possible to reduce the capacity of heat source equipment and ice (water) heat storage tanks that cover the air conditioning load during peak hours.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an air conditioning system according to an embodiment of the present invention, showing a state of air conditioning the room.

FIG. 2 is a plan view of a double floor chamber.

FIG. 3 is an explanatory diagram of a state in which a wall surface of a chamber (a wall face on a side surface where a letter chamber is not formed on a back portion) is viewed from the inside of the chamber.

FIG. 4 is an explanatory diagram of the inside of a peri-counter.

FIG. 5 is an explanatory diagram of fins attached to the air supply port on the front surface of the replacement ventilation chamber.

FIG. 6 is an explanatory diagram showing the relationship of the turning directions of the supply air discharged from the supply ports arranged in the vertical and horizontal directions.

FIG. 7 is an explanatory diagram showing a schematic configuration of an air conditioning system according to an embodiment of the present invention, in which the air supplied from the air conditioner into the double floor chamber does not pass through the room and the ceiling return chamber is shown. It shows the state of sending in.

FIG. 8 is an explanatory view showing an embodiment in which a discharge port of a duct for supplying air from the ventilation chamber into the ceiling return air chamber is provided on each span of the ceiling beam in the ceiling return air chamber. An example of direct spraying toward the ceiling slab surface is shown.

FIG. 9 is an explanatory view showing an embodiment in which a discharge port of a duct for supplying air from the ventilation chamber into the ceiling return air chamber is provided in each span of the ceiling beam in the ceiling return air chamber. An example of spraying in parallel along the ceiling slab surface is shown.

FIG. 10 is an explanatory view showing an embodiment in which a conical guide member is arranged so as to face a discharge port of a duct for supplying air from the ventilation chamber into the ceiling return air chamber.

FIG. 11 is an explanatory diagram of a case where air is circulated from one side of the double bed chamber to store heat therein.

[Explanation of symbols] OA outside air RA return air SA air supply 1 Air conditioning system 10 rooms 20 floors 21 Double floor chamber 22 ceiling 23 Ceiling return air chamber 25 Air conditioning machine room 29 air conditioner 30 Return air duct 31 Outside air intake duct 35 Floor outlet 40 diffuser 41 opening 52 Peri-counter 55 Replacement Ventilation Chamber 56 Air inlet 60 ducts 61 Open / close damper 70 fans 75 Intake port

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3L053 BB01 BB02 BB04                 3L054 BG00 BH07                 3L080 BA03 BB04

Claims (8)

[Claims] 1. A floor blowing air-conditioning system in which a double floor chamber is formed under the floor of an air conditioning area, and a ceiling return air chamber is formed on a ceiling, the air conditioner being a peripheral portion of the double floor chamber. From the air supply position to the inside of the double-bed chamber, the air is extracted from the inside of the double-bed chamber, and a duct is provided to send the air into the ceiling return air chamber without passing through the air conditioning area. A floor blowing air-conditioning system equipped with an opening / closing damper that controls the air flow in the duct. 2. The floor blowing air conditioning system according to claim 1, wherein in the perimeter zone, air is extracted from the double floor chamber and sent to the ceiling return air chamber. 3. The floor blowing air conditioning system according to claim 2, wherein a replacement ventilation chamber is arranged in the perimeter zone, and air is sent into the ceiling return air chamber through the replacement ventilation chamber. 4. The duct extends across the ceiling ventilation chamber, and the outlet of the duct is provided in each span of the ceiling beam provided in the ceiling return air chamber. , 2 or 3 floor blowing air conditioning system. 5. A method for air-conditioning an air-conditioning area in which a double-floor chamber is formed under the floor and a ceiling return air chamber is formed on the ceiling, wherein a double-floor is removed from the air conditioner before the air-conditioning area is air-conditioned. An air conditioning method, characterized in that the air supplied into the chamber is sent into the ceiling return air chamber without passing through the air conditioning area to store heat in the double floor chamber in advance. 6. When the double-bed chamber is pre-stored with heat, the double-bed is provided at a peripheral portion of the double-bed chamber and at a position farthest from an air supply position from the air conditioner into the double-bed chamber. It is characterized by extracting air from the chamber and sending the air into the ceiling return air chamber without passing through the air conditioning area.
The air conditioning method according to claim 5. 7. The air conditioning method according to claim 6, wherein in the perimeter zone, air is extracted from the double floor chamber and sent to the ceiling return air chamber. 8. The air conditioning method according to claim 5, 6 or 7, wherein heat is stored in advance in the ceiling return air chamber simultaneously with the double floor chamber.