| 摘要 |
PROBLEM TO BE SOLVED: To provide an underfloor heating system having a sufficient heat storage capacity to rapidly heat an underfloor region.SOLUTION: An air flow passage 10 is connected to an air circulation layer S between a solar cell module 5 as a flat roofing material and a roof surface 4a, and a foundation slab 20 is cast in an underfloor region 17. A heat insulation layer 22 is arranged in the circumferential edge of the foundation slab 20, and on the foundation slab 20, an underfloor pipe 25 is arranged to be connected to the air flow passage 10. A plurality of upward air outlets 30 blowing warm air upward and a plurality of downward air outlets 30b blowing warm air downward are respectively formed in the underfloor pipe 25. A total flow passage cross sectional area of the downward air outlets 30b is larger than that of the upward air outlets 30a, so that heat by warm air from the downward air outlets can be sufficiently stored in the foundation slab with a high heat storage capacity, and at the same time, the underfloor region and the floor lower surface can be directly warmed up by warm air from the upward air outlets. Consequently, an underfloor temperature rising speed is increased and efficiency of underfloor heating is improved. |
