JP3528907B2 - Air conditioning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to air conditioning equipment for air conditioning (air conditioning) a living space of a building.

[0002]

2. Description of the Related Art As is well known, a heat storage system in an air conditioner performs a heat storage operation on a heat storage medium at night or at a low load, and uses its stored heat at a peak load to cut a peak load. Thereby, the capacity of the heat source device can be reduced and the running cost can be reduced, which is also effective from the viewpoint of energy saving.

[0003]

By the way, in the conventional heat storage system, it is the most general that the water held in the heat storage tank is used as the heat storage medium, but in recent years, the use of other heat storage media has been studied. . Above all, it is considered that the skeleton of a reinforced concrete building is effective as a heat storage medium because it can be expected to secure a considerable amount of heat storage.

In view of the above circumstances, it is an object of the present invention to provide an effective air-conditioning facility that uses a building frame as a heat storage medium.

[0005]

According to a first aspect of the present invention, there is provided an air conditioning equipment using a floor slab, which is a frame of a building, as a heat storage medium, wherein a finishing floor is provided on the floor slab and a floor is provided between them. A main air conditioner that secures a chamber, processes an indoor load and an outdoor air load, and performs a heat storage operation for the floor slab, a perimeter air conditioner that processes a perimeter load, and an exhaust for discharging indoor air The main air conditioner includes a fan, and (a) a normal operation mode in which the outside air taken in and the return air from the room are processed and blown from the floor surface to the room through the floor chamber, (b) the inside of the floor chamber A first heat storage operation mode in which heat is stored in a floor slab by circulating it while treating the air, and (c) outside air taken in is blown out to the floor chamber without being processed and Exhaust fan by the second thermal storage operation mode for performing heat storage with respect to the floor slab by directly exhausted to select any of the configuration of the bed chamber, and the main air conditioner Contact
And perimeter air conditioners are
Circulation of the supply air blown to the floor chamber through the floor chamber
Through the floor chamber to the main air conditioner and
The floor slab against the return air returned to the perimeter air conditioner
It is configured to use the stored heat by giving the stored heat of
It is a thing.

[0006]

According to a second aspect of the present invention, in the first aspect of the invention, the floor chamber is divided into a supply chamber and a retan chamber, and a damper that can be opened and closed is provided between them. In the normal operation mode, the main air conditioner takes the outside air and indoor air taken in from the main air conditioner → supply chamber →
The chamber is circulated in the order of: indoor chamber, return chamber, main air conditioner, and at that time, the perimeter air conditioner circulates air in the order of perimeter air conditioner → perimeter → retan chamber → perimeter air conditioner, and (b) the first heat storage In the operation mode, the main air conditioner circulates air in the order of main air conditioner → supply chamber → return chamber → main air conditioner. (C) In the second heat storage operation mode, the main air conditioner and the exhaust fan are The intake air is exhausted through the main air conditioner → supply chamber → return chamber → exhaust fan in this order.

[0008]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing a schematic configuration of an air conditioner of the present invention, wherein reference numeral 1 is a skeleton of this building and a reinforced concrete floor slab used as a heat storage medium in the present invention, 2 is a finishing floor, A floor chamber 3 is provided between the floor slab 1 and the finishing floor 2. The finishing floor 2 has ventilation, and a carpet having air permeability is laid on the finishing floor 2.
The supply air (SA) supplied into the floor chamber 3 from the above is blown out into the room from the entire surface of the finishing floor 2. The floor chamber 3 is divided into a supply chamber 3a and a return chamber 3b, and a damper 4 that can be opened and closed is provided between them, and by opening the damper 4, both chambers 3a and 3b communicate with each other. It is supposed to do.

Reference numeral 5 is a main air conditioner for processing an indoor load and an outdoor air load and performing a heat storage operation for the floor slab 1, and an outdoor air duct 6 for taking in outdoor air (OA) and supply air to the supply chamber 3a. A supply air duct 7 for supplying the air and a return air duct 8 for sucking the return air (RA) from the return chamber 3b are connected to each other. Reference numbers 9 and 10
Is a damper.

Reference numeral 11 is a perimeter air conditioner for processing the perimeter load, and is connected to an air supply duct 12 that blows out air supply to the window surface and a return air duct 13 that sucks return air from the return chamber 3b. .

Both the air supply blown into the room from the main air conditioner 5 and the air supply blown out from the perimeter air conditioner 11 to the window surface are both return air ducts 1 provided near the window surface.
4 is sucked into the return chamber 3b, and the return air duct 8 and the return air duct 13 are drawn from the return chamber 3b.
Thus, the main air conditioner 5 and the perimeter air conditioner 11 are returned to. An exhaust fan 15 is connected to the retan chamber 3b so that a part of the return air is exhausted from the retan chamber 3b as exhaust (EA) to the outside.

The operation modes of the equipment having the above configuration are shown in FIGS.
This will be described with reference to FIG. Ducts operating in each mode are indicated by solid lines, and ducts that are idle are indicated by broken lines.
In addition, open dampers are indicated by white circles and closed dampers are indicated by black circles.

(A) Normal operation mode (see FIG. 1) This is an operation mode for normal cooling and heating. In this case, the main air conditioner 5 takes in a required amount of outside air, mixes it with the return air, processes it, and circulates it in the path of the main air conditioner 5 → supply chamber 3a → indoor → return chamber 3b → main air conditioner 5. . The exhaust fan 15 discharges an amount of air corresponding to the amount of outside air taken in from the return chamber 3b to balance the amount of air.

The set temperature is the same as usual (for example, the set temperature in the room during cooling is about 26 to 28 ° C, the blowout temperature of supply air is about 16 to 18 ° C, and the set temperature in heating is 2).
About 0 ~ 22 ° C, blowout temperature about 30 ° C)
The air supply amount may be appropriately set so that the indoor load can be processed.

The perimeter air conditioner 11 has a blowout temperature of about room temperature (26 to 28 ° C. during cooling as described above) in order to cope with a perimeter load that cannot be sufficiently processed by the main air conditioner 5 (particularly mainly a solar radiation load). Temperature, about 20 to 22 ° C during heating), and supply the air to the perimeter air conditioner 11 → perimeter → return chamber 3b →
It is circulated in the path of the perimeter air conditioner 11.

In the normal operation mode, heat is already stored in the floor slab 1 in the heat storage operation mode described below, and the stored heat is radiated to the return air particularly in the retan chamber 3b and used. That is, during cooling, the floor slab 1 has a predetermined heat storage temperature (for example, 15 to
It has been cooled to about 20 ° C), and the return air sucked into the retan chamber 3b is such a low temperature floor slab 1
After being contacted with and cooled, it returns to each air conditioner 5, 11. Even during heating, the floor slab 1 has a predetermined heat storage temperature (for example, 3
It is heated to about 0 ° C, and the return air is the floor slab 1
After being heated by, it returns to each air conditioner 5, 11. Therefore, the processing of each air conditioner 5, 11 can be reduced by the amount of heat storage of the floor slab 1 that can be expected.

(B) First heat storage operation mode (see FIG. 2) This is an operation mode for storing heat in the floor slab 1 by the main air conditioner 5 when air conditioning is stopped at night or the like. In this case, the perimeter air conditioner 11 and the exhaust fan 15 are stopped, and the damper 4 between the supply chamber 3a and the return chamber 3b is stopped.
To open them to communicate with each other, and set the outlet temperature of the main air conditioner 5 as a heat storage temperature (for example, about 15 to 20 ° C in the cooling season and about 30 ° C in the heating season as described above). 5 → Supply chamber 3a → Return chamber 3b → Main air conditioner 5 is circulated to make the floor slab 1 the heat storage temperature.

(C) Second heat storage operation mode (see FIG. 3) This is an operation mode in which heat is stored in the floor slab 1 by the outside air when the outside air temperature conditions such as the intermediate period are satisfied. That is, when the outside air temperature is lower than the indoor set temperature (more strictly, the outside air enthalpy is lower than the indoor enthalpy) at night during the cooling season, etc., if the outside air is supplied as it is to the floor chamber 3, the outside temperature of the floor slab 1 is reduced. It is possible to cool down and store heat. Therefore, the outside air taken in by the main air conditioner 5 is directly blown into the supply chamber 3a without being processed,
→ Return chamber 3b → Exhaust fan 15 discharges the heat, and the floor slab 1 is cooled to the outside air temperature to store heat (cooling).

According to the air conditioning equipment described above, the main air conditioner 5 supplies the air from the entire floor to the room through the supply chamber 3a, so that comfortable and efficient air conditioning for the living area can be performed, and the perimeter air conditioning can be performed. Since the machine 11 processes a perimeter load such as a solar radiation load, a more comfortable indoor environment can be secured. The floor slab 1 can be effectively used as a heat storage medium in each of the operation modes as described above, and heat is stored by the outside air in the second heat storage operation mode depending on the outside air condition.
The running cost required for the heat storage operation can be reduced as compared with the case where the heat storage operation by the main air conditioner 5 is always performed (first heat storage operation mode).

Further, in the above-mentioned air conditioning equipment, the heat retained by the floor slab 1 is returned to the respective air conditioners 5 and 11 from the room (R).
A), that is, the stored heat is used for the return air, so that it is more efficient than the case where the stored heat is used for the supply air (SA) blown into the room as usual. It is capable of driving.

That is, when heat storage is used for air supply, it is preferable to secure a large temperature difference between the heat storage temperature and the air supply temperature, but during cooling, a large temperature difference between the two is secured. Is difficult, and therefore the heat retained by the floor slab 1 cannot be effectively released, which is not efficient. For example, as described above, the supply air outlet temperature during cooling is set to about 16 ° to 18 ° C, but it is necessary to keep the heat storage temperature sufficiently lower than the indoor dew point temperature (usually around 15 ° C). As a result, dew condensation will occur on the floor slab 1, which is not preferable, and therefore a temperature difference between the two cannot be secured, and heat storage cannot be effectively used.

On the other hand, when the heat storage is used for the return air as described above, the return air temperature is about room temperature, so that a large temperature difference from the heat storage temperature can be secured. For example, the return air temperature (that is, the room temperature) during cooling is 26
Since the temperature is about 28 ° C, the heat storage temperature of the floor slab is 20
If the temperature is ° C, a temperature difference of 6 to 8 deg can be secured, and if the heat storage temperature is set to about 15 ° C, which is close to the indoor dew point temperature, it is 10
It is possible to secure a temperature difference of deg or more, and by securing such a temperature difference, the heat retained by the floor slab 1 can be sufficiently released to the return air, and the heat storage can be effectively used.

In the above case, the return chamber 3b
Heat is stored in the entire floor slab 1 including not only the range of the supply chamber 3a but also the range of the supply chamber 3a, but the temperature of the air supply from the main air conditioner 5 supplied to the supply chamber 3a is almost equal to the heat storage temperature of the floor slab 1. Since they are equivalent, the heat storage effect here cannot be expected so much. Then, the retan chamber 3 which can secure the temperature difference between the heat storage for the floor slab 1 and the return air.
It may be performed only in the range of b, and in that case, the duct path may be changed so that such heat storage operation can be performed. However, as mentioned above, the floor slab 1
When the whole heat is stored, there is an advantage that heat loss from the floor chamber 3 to the skeleton can be prevented as compared with the case where it is not performed, and a preheating (pre-cooling) effect for the skeleton is obtained, so that it is wasted. There is no.

Further, in the above description, the heat storage is used for the return air of the perimeter air conditioner 11. However, since the temperature of the air supply of the perimeter air conditioner 11 may be about room temperature, the heat is stored for the air supply. It is also possible to use. In that case, the duct path may be changed so that the air supply of the perimeter air conditioner 11 is blown out to the perimeter after passing through the supply chamber 3a.

Further, in the present invention, the types of the main air conditioner 5 and the perimeter air conditioner 11 are arbitrary, and not only the air handling unit and the direct expansion type package air conditioner,
As the perimeter air conditioner 11, a fan coil unit or the like can also be suitably adopted. Of course, the main air conditioner 5 and the perimeter air conditioner 11 may be installed in any form such as a floor-standing type, a ceiling hanging type, or a ceiling concealed type. It is also preferable to provide a total heat exchanger for recovering waste heat from the exhaust air from the exhaust fan 15 to the outside air taken in by the main air conditioner 5.

[0026]

According to the first aspect of the present invention, the main air conditioner can provide comfortable and efficient air conditioning for the living area by supplying air from the floor surface to the room through the floor chamber, and is equipped with a perimeter air conditioner. Therefore, not only a more comfortable indoor environment can be secured, but also the heat retained by the floor slab that has been stored by the main air conditioner can be effectively used, so that the floor slab can be effectively used as a heat storage medium. Particularly, depending on the conditions, the heat storage operation for the floor slab is performed by the outside air. Therefore, the running cost required for the heat storage operation can be reduced by effectively utilizing the natural energy. Moreover, the return air from the room
The stored heat is used there through
A large temperature difference from the heat temperature can be secured to ensure efficient operation.
You can

[0027]

According to the second aspect of the present invention, the floor chamber is divided into the supply chamber and the retan chamber, the chambers are divided or communicated with each other in accordance with each operation mode, and the air circulation path is changed, whereby an efficient operation is achieved. The operation can be performed and the duct path can be simplified.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of air conditioning equipment of the present invention.

FIG. 2 is a diagram showing a first heat storage operation mode of the same.

FIG. 3 is a diagram showing a second heat storage operation mode of the same.

[Explanation of symbols]

1 Floor slab (heat storage medium) 2 finishing floor 3 floor chamber 3a Supply chamber 3b retan chamber 4 damper 5 Main air conditioner 11 Perimeter air conditioner 15 Exhaust fan

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Kazuyoshi Nasuhara, Shibaura 1-2-3, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (56) Reference JP-A-5-157279 (JP, A) JP Japanese Patent Laid-Open No. 10-9614 (JP, A) Japanese Patent Laid-Open No. 9-119672 (JP, A) Japanese Patent Laid-Open No. 7-301432 (JP, A) Japanese Patent Laid-Open No. 9-292139 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) F24F 5/00 F24F 5/00 102 F24F 13/02

Claims (2)

(57) [Claims] 1. An air conditioning system using a floor slab, which is the structure of a building, as a heat storage medium, wherein a finishing floor is provided on the floor slab to secure a floor chamber therebetween, and an indoor load and an outdoor air load. And a main air conditioner for performing heat storage operation on the floor slab, a perimeter air conditioner for processing a perimeter load, and an exhaust fan for exhausting indoor air through the floor chamber, The main air conditioner is (a) a normal operation mode in which the outside air taken in and the return air from the room are processed and blown out from the floor surface to the room through the floor chamber, (b) while the air in the floor chamber is processed. A first heat storage operation mode in which heat is stored in a floor slab by circulating it. (C) The outside air taken in is blown out into the floor chamber without being processed and the exhaust fan The second heat storage operation mode for performing heat storage with respect to the floor slab by directly exhausted from the bed chamber, is configured to select one of said main air conditioner and perimeter air conditioner are each chamber
And the air supplied to the perimeter through the floor chamber
Circulate through and through the floor chamber
For return air returned to the main air conditioner and perimeter air conditioner
The stored heat of the floor slab is used to utilize the heat storage
Air-conditioning equipment characterized by being configured to 2. The floor chamber is divided into a supply chamber and a return chamber, and a damper that can be opened and closed is provided between them. (A) In the normal operation mode, the main air conditioner takes in outside air. And indoor air as the main air conditioner → supply chamber →
The chamber is circulated in the order of: indoor chamber, return chamber, main air conditioner, and at that time, the perimeter air conditioner circulates air in the order of perimeter air conditioner → perimeter → retan chamber → perimeter air conditioner, and (b) the first heat storage In the operation mode, the main air conditioner circulates air in the order of main air conditioner → supply chamber → return chamber → main air conditioner. (C) In the second heat storage operation mode, the main air conditioner and the exhaust fan are claim 1, characterized in that formed by a structure for discharging through the outside air intake main air conditioner → sequentially supply chamber → Litan chamber → exhaust fan
Air conditioning equipment described.