JP2637361B2 - Bottom cooling prevention system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for preventing a floor from being cooled down in a downstairs, particularly in a cold region.
It is suitable for use when the slab is cooled downstairs in a piloti, a parking lot or the like.

[0002]

2. Description of the Related Art When a downstairs is a pillow, a parking lot, a machine room, etc., the slab is cooled by ventilation and invasion of the outside air, and in a living room on the upper floor, the floor is cooled by cold radiation from the floor surface. The environment deteriorates. Conventionally, as a countermeasure against such bottom cooling, heat insulation treatment is applied to the lower surface of the slab to increase the heat insulation coefficient of the floor, thereby reducing cold radiation from the floor and preventing a temperature drop on the floor. Was common. In addition, a radiator and a dedicated fan heater are installed directly on the lower floor of the ceiling and heat is generated on the lower floor to supply heat to the floor of the living room and reduce the temperature of the floor of the living room. There was something to prevent.

[0003]

However, if only the slab lower surface is subjected to heat insulation treatment, the slab has a resistance to cold radiation from the floor surface, but cannot completely block the cold radiation, and therefore cannot provide a cooling radiation. The feeling of cold from the bottom could not be removed. Also, in the case of only the heat insulation treatment, the floor surface temperature is lower than the room temperature, and the floor surface temperature rises in accordance with the increase in the room temperature. At times, the floor surface temperature is significantly lower than room temperature, and there is a problem that the thermal environment of the living room is significantly reduced. This became a very serious problem, especially in cold regions where bottom cooling is a factor in evaluating building performance. In a system that directly installs a radiator and a dedicated fan heater, etc., it is possible to actively heat the floor, but a radiator and an automatic control device are required, which increases initial costs and increases operating costs. Management (maintenance) has also become complicated. The present invention has been made in view of the above circumstances, and a bottom cooling prevention system capable of positively heating a floor surface without using a heat radiating device or an automatic control device, thereby reliably preventing bottom cooling. The purpose of the present invention is to improve the thermal environment.

[0004]

Means for Solving the Problems To achieve the above object, a configuration of a bottom cooling prevention system according to the present invention is a system for preventing a floor temperature of a room directly above a piloti where a lower floor is a piloty from lowering, The air supply duct from the air conditioner has been extended to the back of the piloti ceiling below the slab in the room directly above the piloti, and a self-opening / closing damper that opens and closes the damper by means of a temperature-sensitive driving means has been installed in the air supply duct extended behind the piloti ceiling. It is characterized by the following. And, together with the air supply duct, a retentate duct provided with a self-opening / closing damper may be extended behind the piloti ceiling. Further, the bottom cooling prevention system may be one in which the self-opening / closing damper is not provided, and the air supply duct and the return duct are extended in an open state to the back of the piloti ceiling. Further, in the bottom cooling prevention system, a motor damper controlled to be opened and closed by a thermostat can be provided in an air supply duct and a return duct extended behind the piloti ceiling. In addition, the bottom cooling prevention system is provided with a bypass duct that supplies air from the common part in the same building as the piloti ceiling to the piloti ceiling above the common part and the piloti ceiling, and provides an air supply fan that is started and stopped by a thermostat. It may be provided in a bypass duct. A self-opening / closing damper is provided in the bypass duct, and the start / stop of the air supply fan can be controlled in conjunction with the damper opening / closing operation of the self-opening / closing damper.

[0005]

[Function] In the bottom cooling prevention system in which a self-opening / closing damper is provided in the air supply duct, when the temperature behind the piloti ceiling falls, the self-opening / closing damper is driven to open the damper and hot air is supplied to the piloti ceiling back. As a result, the floor of the room directly above the piloti is heated, and the floor is not cooled down. When the temperature behind the ceiling of the piloti rises to a certain value, the self-opening / closing damper is driven to close the damper, and the supply of warm air is stopped. Therefore, hot air is supplied only when the temperature behind the ceiling of the piloti drops, and unnecessary heating loads are eliminated, thereby preventing the bottom from being cooled by economical operation. Then, if the urethane duct is extended behind the piloti ceiling, hot air is collected by the urethane duct, and the heat supply efficiency inside the piloti ceiling is enhanced. Also, if you do not provide a self-opening / closing damper and extend the air supply duct and the return duct behind the piloti ceiling in an open state, conditioned air will always be blown out,
In summer, cool air is supplied to reduce the air-conditioning load of the room directly above the piloti, and the thermal environment is improved throughout the year. In addition, if a motor damper controlled to be opened and closed by the thermostat is provided in the air supply duct and the return duct, the operation accuracy of hot air supply and stop can be improved. Furthermore, if the common area and the underside of the piloti are connected by a bypass duct, and if air from the common area is supplied to the underside of the piloti, the conditioned air is not directly used and the air-conditioning load does not increase, which is economical. It will be. Then, if the bypass duct is opened and closed by a self opening and closing damper, and the air supply fan is started and stopped in conjunction with the opening and closing operation of this self opening and closing damper, the backflow of cool air from behind the piloti ceiling to the common area is prevented. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a system for preventing cooling of a bottom according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view of the configuration of the bottom cooling prevention system of the present invention. Above the piloti 1 is provided a chamber 3 directly above the piloti, and below the slab 5 of the chamber 3 directly above the piloti, a ceiling 7 behind the piloti is formed. The lower floor living room 9 is provided adjacent to the piloti 1,
The upper floor of the lower floor living room 9 is an upper floor living room 11 adjacent to the room 3 directly above the piloti. An air supply duct (supply duct) 15 from an air conditioner (not shown) is provided on the underside 13 of the lower floor living room 9.
The supply duct 15 is open at an opening 17 of the lower floor living room 9. A branch duct 19 is connected to the supply duct 15.
Has been extended to A self-opening / closing damper 21 is provided in the branch duct 19 inside the piloti ceiling 7, and the self-opening / closing damper 21 opens and closes itself according to the temperature inside the piloti ceiling 7.

Here, the self-opening / closing damper 21 will be described.
This will be described in more detail. FIG. 2 is a front view of the self opening and closing damper, and FIG. 3 is a side view of the self opening and closing damper. A damper 25 is rotatably attached to the damper outer cylinder 23 via a rotation shaft 27, and a pinion 29 is fixed to an end of the rotation shaft 27. A rack gear 31 is meshed with the pinion 29, and the rack gear 31 is moved in a longitudinal direction by a driving cylinder 33 which is a temperature-sensitive driving means.
A wax (gel-like viscous material) 35 that expands and contracts due to a change in heat is sealed in the drive cylinder 33, and the expansion and contraction of the wax 35 drives the rack gear 31 via a piston 33a. In the case of the drive cylinder 33, when the ambient temperature decreases, the wax 35 shrinks, and the rack gear 31 moves rightward in the drawing, thereby causing the damper 2 to move.
5 is opened. When the ambient temperature rises, the damper 25 is closed by the above-described reverse operation.

FIGS. 4 and 5 show another embodiment of a self-opening / closing damper. Self-opening / closing damper 37 according to this embodiment
In this embodiment, a piston plate 39 and a spring 41 are used in place of the pinion 29 and the rack gear 31, and other mechanisms are substantially the same as those of the self-opening / closing damper 21. Therefore, when the drive cylinder 33 is driven, the piston plate 39
Is moved, and the damper opening / closing rod 43 connected to the piston plate 39 is rotated, so that the damper 2
5 is a mechanism to be closed.

FIGS. 6 and 7 show still another embodiment of the self-opening / closing damper. In the self-powered opening / closing damper 45 according to this embodiment, spring-shaped shape memory alloys 47 and 49 which are temperature-sensitive driving means are used for the opening / closing mechanism. That is, when the ambient temperature decreases, the shape memory alloy 49 becomes spring-like,
The shape memory alloy 47 becomes a linear wire, and the damper 25 is opened by being pulled by the shape memory alloy 49. When the temperature rises, the operation is reversed and the damper 25 is closed. One of the shape memory alloys 47 and 49 may be a normal spring. Branch duct 1 extended inside piloti ceiling 7
9. Self-powered opening / closing damper 21 (or self-powered opening / closing damper 3)
7 or 45) as a main member, a bottom cooling prevention system is configured.

The operation of the bottom cooling prevention system configured as described above will be described. When the temperature of the underside of the piloti ceiling 7 decreases due to a decrease in the outside air temperature, the wax 35 of the self-opening / closable damper 21 contracts, and the rack gear 31 (see FIG. 3) is moved rightward in the figure, whereby the damper 25 is moved. Be released.
When the damper 25 is opened, warm air is supplied to the underside of the piloti ceiling 7, and the floor of the room 3 immediately above the piloti is heated, so that the bottom is not cooled. In this case, the hot air is not collected, and a natural exhaust system through a gap or the like is used. Thereby, the cost of duct construction is reduced.

When the temperature of the underside 7 of the piloti rises to a certain value due to the supply of warm air, the self-opening / closing damper 2
The first wax 35 expands, and the rack gear 31 is moved leftward in the figure, whereby the damper 25 is closed. When the damper 25 is closed, the supply of warm air to the underside of the piloti ceiling 7 is stopped, and the heat load on the heating device is reduced. Therefore, the supply of the warm air is performed only when the temperature of the underside of the piloti ceiling 7 has dropped, and unnecessary heating loads are eliminated, so that economical operation is realized.
The bottom cooling prevention system, as described above,
Warm air is supplied to the underside of the piloti ceiling 7 to prevent the temperature of the underside of the piloti ceiling 7 from dropping and prevent the bottom of the room 3 directly above the piloti from cooling down. However, by further increasing the amount of heat supplied, the temperature of the slab 5 is reduced. It is also possible to raise the floor to obtain the comfort of floor heating.

In the bottom cooling prevention system shown in FIG. 1, a method is also conceivable in which the self-opening / closing damper 21 is not provided and air-conditioned air is constantly supplied. In this case, since conditioned air is constantly blown out, it is economically disadvantageous, but warm air is supplied in winter and cool air is supplied in summer, and the air conditioning load of the room 3 directly above the piloti is reduced. A comfortable thermal environment can be realized.

FIG. 8 is a schematic view of the configuration of a bottom cooling prevention system provided with a urethane duct. As described above, this bottom cooling prevention system has a branch duct 19 extended to the underside of the piloti ceiling 7 and provided with a self-opening / closable damper 21. Also has a self-opening / closing damper 21. With such a configuration, the warm air from the branch duct 19 is collected by the urethane duct 51, and the warm air is circulated in the underside of the piloti ceiling 7, so that the heat supply efficiency can be improved.

Further, in the bottom cooling prevention system shown in FIG. 8, a self-opening / closing damper 21 may not be provided in the branch duct 19 and the return duct 51. Also in this case, since the conditioned air is constantly circulated, it is slightly disadvantageous economically, but the air conditioning load of the room 3 directly above the piloti can be more efficiently reduced and a comfortable thermal environment can be realized. . Further, in the case of such a configuration, it is possible to make the supply of heat effective by making the air from the lining of the piloti 7 bypass the lower floor living room 9 and the like.

FIG. 9 is a schematic view of the configuration of a mechanical bottom cooling prevention system. In this embodiment, a motor damper 53 is provided in the branch duct 19 in place of the self-opening / closing damper 21 shown in FIG. 1, and a thermostat (T) 55 for detecting the temperature of the underside 7 of the piloti, and a temperature detected from the thermostat 55 A control device (C) 57 for controlling the opening and closing of the motor damper 53 based on the control is provided. In this system, when the temperature of the piloti ceiling 7 decreases, the thermostat 55 detects the temperature, and a control device 57 sends an open signal of the motor damper 53, and the damper is opened to supply hot air to the piloti ceiling 7. Is done. When the temperature of the underside of the piloti ceiling 7 rises and reaches the set temperature value, a closing signal of the motor damper 53 is transmitted from the control device 57, and the damper is closed.

In this system, a driving member and a control device are required, but the operation accuracy of supplying and stopping hot air can be improved. In addition, as described above, by supplying the warm air, the piloti ceiling 7 is pressurized, and the invasion of the outside air into the ceiling is effectively prevented. Further, also in this embodiment, the urethane duct is extended to the underside 7 of the piloti ceiling,
If a motor damper 53 is provided also in this retentate duct, conditioned air can be circulated more effectively.

FIG. 10 is a schematic view showing the construction of another embodiment of a mechanical bottom cooling prevention system. In this embodiment, instead of using the conditioned air from the supply duct, the air from the hall, corridor 59, etc., which is a common part in the same building, is supplied to the piloti ceiling 7 by the air supply fan 63 through the bypass duct 61. Supply. In this case, the air supply fan 63 is driven only by the thermostat 55 and the control device 57 provided on the underside of the piloti 7 when the temperature is lower than the set temperature. In this system, since the conditioned air is not used directly, the air conditioning load does not increase and the system is economical.
If the exhaust heat of the electric room, the machine room, the boiler room and the like is used, the economic efficiency is further improved.

FIG. 11 is a schematic diagram of a configuration of a bottom cooling prevention system using a bypass duct. In this embodiment, a limit switch is mounted on the self-opening / closing damper 21 and the damper 2 is mounted.
The air supply fan 63 is started and stopped in conjunction with the opening and closing of the air supply fan 5. The limit switch takes out a start / stop signal when the damper 25 and the stopper 65 (see FIG. 3) come into contact with or separate from each other, and sends the start / stop signal to the air supply fan 63. The start / stop signal is taken out by moving the position of the rotating shaft 27 (see FIG. 3), the rack gear 31 (see FIG. 3), the damper opening / closing rod 43 (see FIG. 5), the push stay 67 (see FIG. 5), and the like. This can be easily done by using elements.

In the mechanical bottom cooling prevention system shown in FIGS. 10 and 11, the air is not collected, and the air above the piloti ceiling 7 is supplied with air to prevent the invasion of outside air. A system provided between the corridor 59 and the underside of the piloti ceiling 7 for natural circulation, and a system for forcibly returning the corridor 59 to the corridor 59 by a return air fan, like the air supply side, are conceivable.

[0020]

As described above in detail, according to the bottom cooling prevention system of the present invention, when the temperature behind the piloti ceiling falls, the self-opening / closing damper is opened to supply warm air to the piloti ceiling back. Since the floor of the room directly above the piloti is heated, the bottom cooling state can be reliably prevented without using a heat radiating device or an automatic control device, and the thermal environment can be significantly improved. Further, by extending the urethane duct behind the piloti ceiling, the heat supply efficiency inside the piloti ceiling can be further increased. In addition, if the air supply duct and the return duct are extended to the back of the piloti ceiling in an open state without a self-opening / closing damper, the air-conditioning load in the room directly above the piloti can be reduced, and the thermal environment can be improved throughout the year. be able to. In addition, a motor damper that is opened and closed by a thermostat is connected to an air supply duct,
If it is provided in the urethane duct, it is possible to improve the accuracy of hot air supply and stop operations. Furthermore, if the common area and the underside of the piloti are connected by a bypass duct, and the air from the common area is supplied to the underside of the piloti, conditioned air will not be used directly, and the air conditioning load will not increase and the bottom will be economically cooled. Can be prevented. If the self-opening / closing damper of the bypass duct and the air supply fan are linked, it is possible to prevent the backflow of the cool air from the underside of the piloti to the common part.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a configuration of a bottom cooling prevention system of the present invention.

FIG. 2 is a front view of a self-opening / closing damper.

FIG. 3 is a side view of a self-opening / closing damper.

FIG. 4 is a front view of another embodiment of a self-opening / closing damper.

FIG. 5 is a side view of another embodiment of a self-opening / closing damper.

FIG. 6 is a front view of still another embodiment of the self-opening / closing damper.

FIG. 7 is a side view of still another embodiment of the self-opening / closing damper.

FIG. 8 is a schematic configuration diagram of a bottom cooling prevention system provided with a urethane duct.

FIG. 9 is a schematic configuration diagram of a mechanical bottom cooling prevention system.

FIG. 10 is a schematic structural view of another embodiment of a mechanical bottom cooling prevention system.

FIG. 11 is a schematic configuration diagram of a bottom cooling prevention system using a bypass duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piloti 3 Piloti immediately above room 5 Slab 7 Piloti ceiling back 15 Supply duct 21, 37, 45 Self-opening / closing damper 25 Damper 33 Driving cylinder (temperature-sensitive driving means) 51 Retaneduct 53 Motor damper 55 Thermostat 59 Corridor (Common part) 61 Bypass Duct 63 Air supply fan

Claims (8)

(57) [Claims] 1. A bottom cooling prevention system for preventing a floor temperature of a room directly above a piloti where a lower floor becomes a piloti, wherein an air supply duct from an air conditioner is extended to a space above a piloti ceiling below a slab of a room directly above a piloti. And a self-opening / closing damper for opening and closing the damper by means of a temperature-sensitive driving means is provided in an air supply duct extending above the ceiling of the piloti. 2. The bottom cooling device according to claim 1, wherein a return duct from the air conditioner extends to the underside of the piloti ceiling, and the self-opening / closing damper is provided in the return duct extended to the underside of the piloti ceiling. Prevention system. 3. The bottom cooling prevention system according to claim 1, wherein the air supply duct is extended to the back of the piloti ceiling in an open state without providing the self-opening / closing damper. 4. The bottom cooling prevention system according to claim 3, wherein the air supply duct and the return duct are extended to the back of the piloti ceiling in an open state without providing the self-opening / closing damper. 5. A bottom cooling prevention system, wherein a motor damper controlled to be opened and closed by a thermostat is provided in an air supply duct extending behind the piloti ceiling. 6. A retentate duct extending from the air conditioner to the back of the piloti ceiling, and a motor damper controlled to be opened and closed by the thermostat is provided in the retentate duct extending to the back of the piloti ceiling. Bottom cold prevention system as described. 7. A bypass duct for supplying air from the common part in the same building as the underside of the piloti ceiling to the underside of the piloti is provided over the common part and the underside of the piloti, and an air supply fan started and stopped by a thermostat A bottom cooling prevention system, wherein a cooling water is provided in the bypass duct. 8. The cooling according to claim 7, wherein said bypass duct is provided with said self-opening / closing damper, and said air supply fan is started and stopped in conjunction with a damper opening / closing operation of said self-opening / closing damper. Prevention system.