JP3298813B2 - Floor air-conditioning system using heat storage - Google Patents

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 from a ceiling space from the floor side into a living room space through an underfloor space formed between a floor and a floor frame. And basically has a configuration as shown in FIG.

In FIG. 4, reference numeral a denotes a floor frame, b denotes a floor of a living room, for example, a free access floor, and an underfloor space c is formed between the floor b and the floor frame a. An air conditioner d is installed outside the room, and a duct e on the blow-out side of the conditioned air is located below the floor,
The duct f on the suction side corresponds to the ceiling side. The free access floor b is provided with an outlet g on the floor and an outlet h on a perimeter as a ceiling space for the conditioned air.

In the above configuration, the conditioned air blown out from the blow-off duct e of the air conditioner d is supplied into the living room from the outlets g and h through the underfloor space c, and is supplied to the air-conditioner. Inlet duct f through upper space j
To the air conditioner d.

[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 operating costs. Is needed.

In view of the above, the inventors of the present invention have proposed that, in the above-described floor blow air-conditioning system, the floor frame has a hollow portion so that conditioned air can be supplied to the hollow portion. A floor blowing air-conditioning system that uses heat stored in the floor frame outside the hours when air conditioning is required (at night) and radiates heat during the day when air conditioning is required (daytime) and uses it for air conditioning. Invented. However, such an air-conditioning system has the following problems because the conditioned air passes through the living room space even during heat storage at night. a. In order to pass through the living room space which has a large thermal effect from the outside area,
Heat storage loss occurs and energy is wasted. b. At the end of the heat storage, the interior of the living room becomes too cold (or too warm), and the comfort is impaired. An object of the present invention is to solve the problems described above and improve the performance of an air conditioning system using frame heat storage in such an air conditioning system using frame heat storage.

[0008]

In order to solve the above-mentioned problems, according to the present invention, air-conditioned air from an air conditioner is provided on a floor provided on a floor via an under-floor space formed between the floor and a floor frame. In the floor air-conditioning system in which the air flows into the living room space from the air outlet, flows out of the ceiling air inlet and returns to the air conditioner, the floor frame has a hollow portion, and the hollow portion forms an air passage. The air passage has a configuration in which both ends communicate with the underfloor space through communication ports.In the underfloor space, corresponding to each communication port, a wind shield plate is installed inside the position, and each of the airflow boards is provided with a corresponding one. A configuration in which the floor outlet is arranged corresponding to the underfloor space between the wind shields, and a configuration in which conditioned air from an air conditioner is blown out to an underfloor space corresponding to one end of the air passage, and at the other end side Ventilation opening / closing equipment on the corresponding wind shield Suggest floor blowout air conditioning system utilizing precursor thermal storage consisting installed configuration in which the.

The present invention proposes that the floor outlet has no automatic air volume adjusting mechanism in the above configuration.

According to the present invention, in the above structure, a bypass duct is provided from the underfloor space connected to the communication port at the other end of the air passage to the suction side of the air conditioner, and a ventilation opening / closing device is provided in the bypass duct. suggest. In the present invention, in this configuration, the bypass duct extends from the underfloor space to the ceiling space along the wall, passes through the ceiling space to the suction side of the air conditioner, and connects the ceiling suction port to the bypass duct. Propose that.

Further, the present invention proposes, in the above configuration, the ventilation opening / closing device is a damper whose opening can be automatically controlled by remote control.

Further, according to the present invention, in the above configuration,
We propose to cover the floor frame that constitutes the air passage with a heat insulating material.

According to the present invention described above, all of the conditioned air blown out from the air conditioner into the underfloor space flows into the hollow portion of the floor frame from the communication port, and the hollow portion serves as an air passage from the upstream side to the downstream side. After flowing, it flows into the underfloor space again from the communication port on the other end side.

In the daytime air-conditioning operation, by opening the ventilation opening / closing device of the wind shield plate, the conditioned air flowing into the underfloor space passes through the ventilation opening / closing device to the underfloor space where the floor outlet is disposed. It flows in and then blows out from the floor outlet into the living room space for air conditioning. Then, the conditioned air supplied to the air conditioner returns from the ceiling suction port to the suction side of the air conditioner through the ceiling space.

In the nighttime heat storage operation outside the air conditioning time,
Although it may be performed in the same manner as the daytime air conditioning operation, in the configuration in which the bypass duct is installed, in the heat storage operation outside the air conditioning time, the ventilation switch of the bypass duct is opened and the ventilation switch of the wind shield is closed. Thus, the conditioned air flowing into the underfloor space can be returned to the suction side of the air conditioner through the bypass duct without being supplied into the living room space at all.

In this manner, the air conditioner is operated only during the required time outside the time when air conditioning is required, particularly during the night when the unit price of the electricity rate is low, and flows through the air passage, that is, the hollow portion of the floor frame. The heat (including cold heat) generated by the operation can be efficiently stored in the floor frame, and the heat storage can be used for air conditioning by flowing the conditioned air through this air passage in the air conditioning operation. When the required time starts, predetermined conditioned air can be supplied into the living room immediately after the air conditioner is started.

Further, during the nighttime heat storage operation, conditioned air (cool air or warm air) having a lower temperature than during the daytime air-conditioning operation is not supplied to the living room, so that heat (cold heat) can be efficiently supplied to the floor frame. It is possible to store heat, and it is possible to solve a problem that impairs comfort such as excessive cooling of the living room space when the air conditioning operation is started in the daytime.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 are explanatory sectional views conceptually showing a first embodiment of a floor blowing air-conditioning system of the present invention for each operation, and FIG. 3 is a sectional view taken along line AA of FIG. is there. Reference numeral 1 denotes a floor frame, and the floor frame 1 is a concrete floor frame having a hollow structure having a hollow portion 2 like a void slab. Reference numeral 3 denotes a floor formed above the floor frame 1 with a space under the floor 4 interposed therebetween, which is, for example, a free access floor. Reference numeral 6 denotes a ceiling configured below a ceiling slab 7 with a ceiling space 8 therebetween.

Reference numeral 9 denotes an air conditioner stored in a storage space 10 adjacent to one end of the living room space 5. The air outlet side duct 11 of the air conditioner 9 is located in the underfloor space 4,
The suction side duct 12 is located in the ceiling space 8. In addition, the floor 3 is provided with an appropriate number of floor outlets 13 at appropriate places, and the floor outlets 13 have an automatic air volume adjusting mechanism capable of automatically controlling the degree of opening of the damper by remote control. Those that have not been applied are applied, and the arrangement will be described later. Meanwhile, ceiling 6
, An appropriate number of ceiling suction ports 14 are installed at appropriate places.

As shown in the figure, the floor frame 1 has a plurality of parallel hollow portions 2 arranged from one end of the living room space 5 to the other end, that is, in the horizontal direction in the drawing. And communication ports 15 and 16 communicating with the underfloor space 4 at the other end side. In the underfloor space 4, each communication port 1
The wind shields 17 and 18 are installed inside the positions of the wind shields 5 and 16, and the floor outlet 13 is arranged corresponding to the underfloor space 4 between the wind shields 17 and 18.

Further, the duct 1 on the outlet side from the air conditioner 9
1 is located in the underfloor space 4 on the side of the wind shield 17, and a damper 19 is installed in the wind shield 18 on the opposite side as a ventilation opening / closing device. The damper 19 is configured so that the opening can be automatically controlled by remote control. In this case, the control of the opening may be control of two positions of “fully open” and “closed”, or control capable of continuously adjusting the opening from “fully open” to “closed”. Is also good.

Further, a bypass duct 20 is connected to the underfloor space 4 communicating with the communication port 16 on the other end side of the air passage 2. The bypass duct 20 extends from the underfloor space 4 to the ceiling space 8 along the wall. The air conditioner 9 is connected to the suction side duct 12 through the ceiling space 8. The ceiling suction port 14 is connected to a bypass duct 20. Dampers 21 and 22 are installed in the bypass duct 20 and the connection duct (not shown) between the ceiling suction port 14 and the bypass duct 20 as ventilation opening / closing devices.

An operation method of the air conditioning system having the above configuration will be described. FIG. 1 shows a heat storage operation state, for example, outside the air-conditioning period in the cooling period, especially at night when the unit price of the electricity rate becomes low. In this heat storage operation state, the damper 19 of the wind shield 18 is closed and the bypass duct 20 is closed. Of the connection duct is closed, and the damper 22 of the connection duct is closed. First, the conditioned air blown out from the outlet side duct 11 of the air conditioner 9 into the underfloor space 4, that is, in this case, the cool air is blocked by the wind shield 17 and does not flow in the underfloor space 4, and all the communication ports 1
5 flows into the hollow part 2 of the floor frame 1. The cold air thus flowing into the hollow portion 2 flows toward the communication port 16 using the hollow portion 2 as an air passage, and cools the floor frame 1 at this time. That is, so-called cold heat is accumulated in the floor frame 1. The cool air that has cooled the floor frame 1 flows out from the communication port 16 into the underfloor space 4 and passes from the underfloor space 4 to the bypass duct 20.
Reflux to the suction side of the air conditioner 9 through the suction side duct 12

As described above, such a heat storage operation is performed only for a predetermined period of time at night when the unit price of the electricity 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, by setting the air blowing temperature in the air conditioner 9 to be lower than the set temperature at the time of air conditioning, for example, to 12 ° C. when the set temperature at the time of air conditioning is 18 ° C. Heat can be stored in the floor frame 1 more efficiently.

As described above, the air conditioner 9 is operated at a necessary time at night to store cold heat in the floor frame 1, and when the time required for air conditioning starts, the air conditioner 9 is again operated for cooling. In this air conditioning operation, unlike the heat storage operation, the damper 19 of the wind shield 18 is open, the damper 21 of the bypass duct 20 is closed, and the damper 22 of the connection duct is open. In this state, all the cool air from the air conditioner 9 flows into the hollow portion 2 from the communication port 15 and flows through the hollow portion 2 toward the communication port 16 in the cooling operation as in the heat storage operation described above. Go. Then, it flows out from the communication port 16 into the underfloor space 4, and then passes through the open damper 19, and then passes through the windshield 17,
The air flows into the area of the underfloor space 4 between the air outlets 18 and then flows out of the floor opening 13 which is always open into the living room to be cooled for the living room. Thereafter, the conditioned air flows into the bypass duct 20 from the ceiling suction port 14 via the connection duct, flows therethrough, and returns from the suction side duct 12 to the suction side of the air conditioner 9.

At the start of the cooling operation as described above, the floor frame 1 of the hollow portion 2 through which most of the conditioned air from the air conditioner 9 flows has been stored by the heat storage operation, that is, has been cooled. Since the air conditioner is in the state, the temperature of the cool air blown into the underfloor space 4 from the blow-out duct 11 of the air conditioner 9 at the start of daytime operation is, for example, a temperature (19 ° C. Even if it is set at 20 ° C.), when it passes through the hollow part of the floor frame 1, it is cooled by heat exchange, so when it exits the communication port 16 on the outlet side of the hollow part 2, The temperature of the conditioned air drops to 18 ° C., and cool air having a predetermined cooling temperature can be supplied into the living room space 5. Further, it is not necessary to start the air conditioner 9 before the time required for air conditioning starts.

Although the present invention has been described above with respect to the operation in the cooling period, the same operation is also performed in the operation in the heating period. In the heat storage operation, warm air is flown into the hollow portion 2 to store heat in the floor frame 1. At the same time, the heat stored in the heating operation can be recovered by the conditioned air and used for heating the room space. In the operation during the heating period, in the heat storage operation, the air blowing temperature of the air conditioner 9 is set higher than the set temperature during air conditioning. For example, when the set temperature during air conditioning is 24 ° C., the temperature is set to 30 ° C. By setting, heat storage can be performed more efficiently.

As described above, the bypass duct 2
0, the hollow portion 2 of the floor frame 1 during the heat storage operation
The air-conditioning air flowing through the
In this way, the conditioned air is not allowed to pass through the living room space 5 at all, so that the heat loss caused by passing through the living room space 5 having a large thermal influence from the outside can be reduced and the efficiency can be improved. At the time of completion of the heat storage, it is possible to prevent the living room space 5 from being air-conditioned too much (for example, too cold) and the comfort is impaired.

In addition, the floor outlet 13 does not need to automatically adjust the amount of air passing therethrough in the heat storage operation and the air conditioning operation, and can be configured without such an automatic air amount adjusting mechanism. . Since the floor outlet provided with the automatic air volume adjusting mechanism takes up space in the height direction, there is a restriction that the height of the underfloor space 4 is reduced and the room space is widened, and the cost also increases. On the other hand, in the present invention, as described above, the floor outlet 13 does not need to automatically adjust the amount of air passing therethrough in the heat storage operation and the air conditioning operation, and can perform efficient heat storage. The above problems and disadvantages do not occur.

In order to more efficiently store heat in the floor frame 1 in which the hollow portion 2 is formed and use the same, as another embodiment, as shown in FIG. It is effective to cover the skeleton 1 with the heat insulating material 23.

In the above-described embodiment, the bypass duct 20 extends from the underfloor space 4 to the ceiling space 8 along the wall, and is connected to the suction side duct 12 of the air conditioner 9 through the ceiling space 8. Although the ceiling suction port 14 is connected to this, as another embodiment, the bypass duct 20 is configured to open to the ceiling space 8, and the return of the conditioned air flows to the suction side duct 12 through the ceiling space 8. It can also be configured to flow.

In some cases, the bypass duct is not provided, and in the heat storage operation, the opening degree of the ventilation opening / closing device 19 of the wind shielding plate 18 is controlled to reduce the amount of ventilation air, and the air conditioning passing through the living room space 5 is controlled. A configuration in which the flow rate of air is reduced may be adopted. In this case, the ventilation opening / closing device 19 of the wind shield plate 18 needs an automatic air volume adjustment mechanism.
3 itself may not have this mechanism, so that the space and cost issues discussed above do not occur to the left.

[0033]

As described above, the present invention has the following effects. a. By storing heat (cold heat) in the frame portion of the floor by storing heat at night and using it during air conditioning operation in the daytime, the burden of heat treatment performed by the air conditioner can be reduced. b. Peak cut of air conditioning (cooling / heating) load in daytime can be performed. 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. The floor outlet does not have an automatic air volume adjustment mechanism, so it can save space, keep the height of the floor low, and increase the height of the living room space by that much, at low cost. is there. f. In the heat storage operation, since the conditioned air does not pass through the living room space, the thermal effect of the outside area can be reduced as much as possible, so that the heat loss can be reduced, and the heat storage operation can be performed with high efficiency. Prevents excessive air conditioning and does not impair comfort. g. By covering the floor frame that performs heat storage with a heat insulating material, it is possible to perform a heat storage and air conditioning operation with higher thermal efficiency.

[Brief description of the drawings]

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

FIG. 2 is an explanatory sectional view conceptually showing an embodiment of the present invention in an air-conditioning operation state.

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

FIG. 4 is an explanatory sectional view conceptually showing a configuration of a conventional air conditioning system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor frame 2 Hollow part (air passage) 3 Floor 4 Underfloor space 5 Living room space 6 Ceiling 7 Ceiling slab 8 Ceiling space 9 Air conditioner 10 Storage space 11 Duct side duct 12 Suction side duct 13 Floor outlet 14 Ceiling inlet 15, Reference Signs List 16 communication port 17, 18 wind shield plate 19 ventilation opening / closing device (damper) 20 bypass duct 21, 22 ventilation opening / closing device (damper) 23 heat insulating material

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI F28D 20/00 F28D 20/00 A (56) References JP-A-55-89639 (JP, A) JP-A-5-157279 ( JP, A) JP-A-2-233916 (JP, A) JP-A-1-184348 (JP, A) JP-A-59-138836 (JP, A) JP-A-6-82089 (JP, A) JP JP-A-3-177777 (JP, A) JP-A-61-184337 (JP, A) JP-A-10-9614 (JP, A) JP-A-10-220812 (JP, A) JP-A-10-227486 (JP) , A) Real opening 49-91132 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 5/00 102 F24F 5/00 F24F 3/00 F24F 13/02 F24F 13 / 068 F28D 20/00

Claims (6)

(57) [Claims] 1. Air-conditioning air from an air conditioner is caused to flow into a living room space from a floor outlet installed on a floor through an underfloor space formed between a floor and a floor frame, and to flow out from a ceiling inlet. In the floor-blowing air-conditioning system in which the air is returned to the air conditioner, the floor frame has a hollow portion, and the hollow portion forms an air passage, and the air passage communicates with the underfloor space through communication ports at both ends. In the underfloor space, corresponding to each communication port, a windshield is installed inside from that position, and the floor outlet corresponding to the underfloor space between the respective windshields. A configuration in which the air-conditioning air is blown out from an air conditioner into an underfloor space corresponding to one end of the air passage, and a ventilation opening / closing device is installed on a wind shield plate corresponding to the other end. Floor blowing using heat storage Air conditioning system 2. The floor air-conditioning system using heat stored in the frame according to claim 1, wherein the floor air outlet has no automatic air volume adjusting mechanism. 3. The air conditioner according to claim 1, wherein a bypass duct is provided from the underfloor space connected to the communication port on the other end side of the air passage to the suction side of the air conditioner, and a ventilation opening / closing device is provided in the bypass duct. Floor air-conditioning system using heat storage 4. The bypass duct extends from the underfloor space to the ceiling space along the wall, passes through the ceiling space to the suction side of the air conditioner, and a ceiling suction port is connected to the bypass duct. 4. A floor blowing air-conditioning system using heat storage of the frame according to claim 3. 5. The floor blow-out air-conditioning system according to claim 1, wherein the ventilation opening / closing device is a damper whose opening can be automatically controlled by remote control. 6. A floor blowing air-conditioning system utilizing heat storage of a frame according to claim 1, wherein the floor frame forming the air passage is covered with a heat insulating material.