JPH109614A - Air-outlet-in-floor air-conditioning method using heat accumulation in floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-outlet-in-floor air-conditioning method using heat accumulation in a floor structure, in which conditioned air from an air conditioner is supplied into a room through an air outlet part in a floor via an underfloor space provided between the floor and the floor structure and the floor structure has a hollow part and communication holes leading from the hollow part to the underfloor space at adequate places. SOLUTION: A floor structure 1 is of a void slab or a similar type having a hollow part 2 and is provided with communication holes 5 leading from the hollow part 2 to an underfloor space 4 at adequate places. By this constitution, an air conditioner 7 is operated to accumulate heat (including cold-heat) in the floor structure while there is no need for air-conditioning. The heat accumulated is used when air-conditioning is required and the air conditioner 7 is started up, so that specified conditioned air can be supplied into the room immediately after the air conditioner 7 begins operating, whether it is in the summer or winter season.

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 utilizing heat storage in a building.

[0002]

2. Description of the Related Art A floor blow air-conditioning system is an air-conditioning system in which conditioned air from an air conditioner is supplied into a room from a floor-side blow-out portion through a space below the floor formed between a floor and a floor frame. Basically, the configuration is as shown in FIG.

In FIG. 7, reference numeral a denotes a floor frame, b denotes an indoor floor, for example, a free access floor, and an underfloor space c is formed between the floor b and the floor frame a. Air conditioner d outside
Is installed, and the duct e on the air-conditioning air outlet side corresponds to the lower floor, and the duct f on the suction side corresponds to the ceiling side. In the free access floor b, the outlet g of the floor surface and the outlet h of the perimeter are used as the outlet of the conditioned air.
Is provided.

In the above configuration, the conditioned air blown out from the blow-out duct e of the air conditioner d is supplied into the room through the outlets g and h via the underfloor space c, and after being supplied to the air-conditioner, the air-conditioned air is blown above the ceiling i. The air is returned from the intake duct f to the air conditioner d via the space j.

[0005]

In the above-described conventional floor air-conditioning system, for a while after the start of the equipment,
Since part of the heat of the conditioned air is lost by the floor frame a, it is difficult to provide a comfortable indoor environment.

[0006] Therefore, in order to improve the indoor environment from the beginning in the conventional floor blowing air conditioning system,
Before the time when air conditioning is required, such as in offices, it is necessary to start the air conditioning equipment or increase the capacity of the air conditioner shortly before the start of working hours, resulting in extra costs It has become.

[0007] In addition, since the return of the conditioned air from the room to the air conditioner is performed through a space formed above the ceiling, the ceiling is large. Therefore, an object of the present invention is to solve such a problem.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, air-conditioned air from an air conditioner is blown out on a floor side through an underfloor space formed between a floor and a floor frame. Floor floor air-conditioning system that supplies air from the floor to the room, the floor frame is configured to have a hollow part, and a floor blow air-conditioning system that uses the heat storage of the frame and provides a communication port between the hollow part and the underfloor space is provided.

In the above configuration, for example, a void slab can be used for the floor frame and a free access floor can be used for the floor. Then, when the floor frame is a void slab, it is proposed to install a storage space for the air conditioner adjacent to the room to be air-conditioned, and to provide a communication port above the storage space with a space under the upper ceiling in the room.

According to the present invention, in the above configuration, a fan heater which also serves as a blowout portion of the conditioned air passing through the underfloor space is installed in the indoor perimeter, and a damper is provided between the fan heater and the underfloor space. It is proposed to provide.

According to the present invention, the air conditioner is operated only for a necessary time outside the time when air conditioning is required, particularly at night when the unit price of the electricity rate is low, and the conditioned air is mainly supplied to the hollow portion of the floor frame. By doing so, heat (including cold heat) generated by the operation of the air conditioner can be stored in the floor frame. For this reason, predetermined conditioned air can be supplied to the room immediately after starting the air conditioner when the time required for air conditioning starts.

In addition, if a fan heater which also serves as a blow-out portion of the conditioned air passing through the underfloor space is installed in the indoor perimeter, this fan heater can be used during winter when air conditioning is required and when it is not. In any case, it can be operated independently of the air conditioner as needed to respond to the heat load from the perimeter zone, and in the summer, like other air blowing parts provided on the floor etc. Then, the conditioned air of the air conditioner can be supplied indoors.

If the air supplied to the room for air-conditioning is configured to return to the air conditioner from the space under the ceiling in the upper part of the room, the space at the ceiling can be reduced.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 6 are diagrams conceptually showing an embodiment of a floor blowing air-conditioning system according to the present invention. In the drawings, reference numeral 1 denotes a floor frame, and the floor frame 1 has a hollow portion 2; For example, it is composed of a void slab. Reference numeral 3 denotes a floor formed above the floor frame 1 with the underfloor space 4 therebetween, for example, a free access floor, and the room above the floor. This underfloor space 4 is OA
It can be used as a wiring space for equipment and communication.

The floor frame 1 has a communication port 5 between the hollow portion 2 and the underfloor space 4. In the configuration shown in the figure, the floor frame 1 is arranged such that the hollow portion 2 faces in the left-right direction in the figure, and the communication ports 5 are provided on the left and right sides.

An air conditioner 7 is installed in an outdoor storage space 6 corresponding to the right side of the floor frame 1 in the drawing, and a blow-out duct 8 of the air conditioner 7 is located in the underfloor space 4. On the other hand, the suction side of the air conditioner 7 is configured upward, and a communication port 9 communicating with the upper part of the room is provided above the storage space 6.

The floor 3 is provided with an appropriate number of air outlets 10 at appropriate places, and these air outlets 10 are provided with an air volume adjusting device (not shown) such as a damper. The configuration of these air outlets 10 may be the same as that of the conventional floor air-conditioning system, and these positions are changed in arrangement according to the furniture layout to provide an effective indoor space for air conditioning. it can.

Reference numeral 11 denotes a perimeter in a room, in this case, a vicinity of a window, and a fan heater 12 is installed on the perimeter 11. This fan heater 1
2 has a fan 13 and a heater 14, and has a communication port with the underfloor space 4 at the bottom, and a damper 15 at this communication port.

The operation method of the air-conditioning system having the above configuration will be described for each season. [Summer] FIGS. 1 and 4 show an operating state in summer, that is, FIG. 1 shows a heat storage operation state outside the air-conditioning time, and FIG. 4 shows an air-conditioning operation state within the air-conditioning time. As shown in FIG. 1, outside the air-conditioning period, particularly at night when the unit price of the electric power rate becomes low, the damper 15 of the fan heater 12 is closed, and the air conditioner 7 Is operated for cooling.

In this operating state, the cold air from the outlet duct 8 flows through the underfloor space 4 as shown by the arrow in the drawing, and is supplied from the communication port 5 into the hollow portion 2 of the floor frame 1 to be cooled. Cool 1 That is, so-called cold heat is accumulated in the floor frame 1. On the other hand, part of the cool air from the outlet duct 8 flows out of the outlet 10 into the room and is supplied to the room for cooling, albeit slightly.

As described above, such a heat storage operation is performed only at a predetermined time during the night when the unit price of the power rate is low, or by using a temperature sensor installed at an appropriate position of the floor frame 1. Controlled operation can be performed to reach the set temperature.

In such a heat storage operation, the air conditioner 7
Air blow temperature is lower than the set temperature during air conditioning, for example, if the set temperature during air conditioning is 18 ° C.,
By setting the temperature to ° C. or the like, heat can be stored more efficiently.

In addition, in such a heat storage operation, in order to allow the cool air from the blow-out side duct 8 to efficiently flow into the hollow portion 2 of the floor frame 1, in addition to the illustrated structure, for example, in the figure, A wind guide plate (not shown) in the right communication port 5
For example, a means for allowing cold air to flow continuously through the hollow portion 2 can be taken. And
In such a configuration, the operation of the baffle plate is also performed on warm air in winter operation described later.

As described above, the air conditioner 7 is operated only for a necessary time.
The air conditioner 7 is again operated for cooling when the time required for air conditioning starts. As shown in FIG. 4, in this air conditioning operation, the air volume adjusting device of the outlet 10 is opened to increase the air volume, and the fan heater 12 opens the damper 15 to operate only the fan 13.

Accordingly, the cool air from the air conditioner 7 is supplied into the room from the outlet 10 and the fan heater 12 through the underfloor space 4, flows through the room, and flows from the upper communication port 9 to the air conditioner 7 in the storage space 6. Reflux.

At the time of starting the cooling operation as described above, since the floor frame 1 is in a state of being cooled by the heat storage operation performed up to that time, a predetermined time immediately after the cooling operation of the air conditioner 7 is started. The conditioned air can be supplied to the room. Therefore, it is not necessary to start the air conditioning equipment before the time required for air conditioning starts.

[Winter Season] Next, FIGS. 5 and 6 show the operation state in winter, that is, FIG. 5 shows the heat storage operation state outside the air conditioning time, and FIG. 6 shows the air conditioning operation state within the air conditioning time. FIG.
As shown in the above, as in the above, the fan heater 1 is not operated during the air-conditioning period, especially at night when the unit price of the power rate is reduced.
The second damper 15 is closed, and the air conditioner 7 is operated for heating while the air volume adjusting device of the outlet 10 is squeezed.

In this operating state, warm air from the blow-out side duct 8 flows through the underfloor space 4 as shown by the arrow in the figure, and is supplied from the communication port 5 into the hollow portion 2 of the floor frame 1 so as to be heated. Warm 1 That is, heat is stored in the floor frame 1. On the other hand, a part of the warm air from the outlet duct 8 flows out of the outlet 10 into the room and is slightly heated for indoor heating. In this operation,
If the heat load from the heat zone is large, this can be reduced by performing the heating operation of the fan heater 12.

As described above, the heat storage operation as described above is performed only for a predetermined period of time at night when the unit price of the electricity fee is low, or by using a temperature sensor installed at an appropriate place such as the floor frame 1 or the like. Thus, the operation can be performed while controlling to the set temperature. In such a heat storage operation, the air blowing temperature of the air conditioner 7 is set higher than the set temperature at the time of air conditioning.
In this case, heat can be stored more efficiently by setting the temperature to 30 ° C. or the like.

As described above, the air conditioner 7 is operated only for the necessary time.
The air conditioner 7 is again operated for heating when the time required for air conditioning starts, and the air volume adjusting device of the outlet 10 is opened to increase the air volume as shown in FIG. Perform air-conditioning operation. At this time, when the heat load from the perimeter zone is large, the fan heater 12 is operated with the damper 15 closed as in the heat storage operation to reduce the heat load from the perimeter zone. If the heat load from the perimeter zone is not so large, the damper 15 is opened and the fan heater 12 is opened.
Can be simply operated as an outlet for warm air flowing through the underfloor space 4.

At the start of the heating operation as described above, since the floor frame 1 has been warmed by the heat storage operation up to that time, predetermined air-conditioning air is supplied immediately after the heating operation of the air conditioner 7 is started. Can be supplied indoors. Therefore, it is not necessary to start the air conditioning equipment before the time required for air conditioning starts.

[0032]

As described above, the present invention has the following effects. a. Stores heat (including cold heat) in the body of the floor in advance by storing heat in the air conditioner outside of the time when air conditioning is required, and uses this heat when the air conditioner is started when air conditioning is required Therefore, regardless of summer or winter, predetermined conditioned air can be supplied to the room immediately after the air conditioner is started. b. Therefore, there is no need to operate the air conditioner before the time when air conditioning is required, such as working hours, or to increase the air conditioning capacity of the air conditioner in response to the heat load immediately after starting, thereby reducing costs. Can be measured. c. The heat storage operation can be performed in a time zone (nighttime) where the electricity rate is low, and the running cost can be further reduced. d. By using a material having a high specific heat as the floor frame, the heat storage effect can be enhanced. e. By using a void slab without a beam as the floor frame, an extra ceiling space does not occur and a minimum ceiling base material can be obtained. This makes it possible to minimize the floor height of a building or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view conceptually showing a configuration of the present invention together with a state of a heat storage operation in summer.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is an explanatory sectional view conceptually showing a configuration of the present invention together with a state of a summer air-conditioning operation.

FIG. 5 is an explanatory sectional view conceptually showing a configuration of the present invention together with a state of a thermal storage operation in winter.

FIG. 6 is an explanatory sectional view conceptually showing a configuration of the present invention together with a state of a winter air conditioning operation.

FIG. 7 is an explanatory sectional view conceptually showing a configuration of a conventional air conditioning system.

[Explanation of symbols]

 Reference Signs List 1 floor frame (void slab) 2 hollow part 3 floor (free access floor) 4 underfloor space 5 communication port 6 storage space 7 air conditioner 8 outlet duct 9 communication port 10 outlet 11 perimeter 12 fan heater 13 fan 14 heater 15 Damper

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiko Nunokawa 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (5)

[Claims] 1. A floor blowing air-conditioning system in which conditioned air from an air conditioner is supplied from a floor-side blowing section into a room through an underfloor space formed between a floor and a floor frame, wherein the floor frame has a hollow portion. A floor blowing air-conditioning system using frame heat storage, wherein a communication port between the hollow portion and the under-floor space portion is provided in an appropriate place. 2. The floor blowing air-conditioning system according to claim 1, wherein the floor frame is a void slab. 3. A storage space for an air conditioner is installed adjacent to a room for performing air conditioning, and a communication port with a space under an upper ceiling in the room is provided above the storage space. Floor blowing air-conditioning system using the heat storage of the skeleton. 4. The floor blowing air-conditioning system according to claim 1, wherein the floor is a free access floor. 5. An indoor perimeter is provided with a fan heater which also serves as a blowout portion of the conditioned air passing through the underfloor space, and a damper is provided between the fan heater and the underfloor space. Any one of claims 1 to 4
Floor air-conditioning system using the heat storage of the skeleton described in the section.