| 摘要 |
PROBLEM TO BE SOLVED: To simplify operation to store heat at a slab and operation to dissipate heat from the slab by applying an air control opening to air-conditioning equipment wherein a ceiling chamber functions as a return chamber and a slab fronting on the ceiling chamber is utilized as a heat storage medium. SOLUTION: An air control opening comprises a first air outlet 3 to supply supply air SA supplied from an air-conditioner through a duct 7 to the interior of a room; a second air outlet 4 to store heat at a slab 8 by spraying air against the slab fronting on a ceiling chamber 6; and a switching mechanism 5 to selectively open either the first or the second air outlet. An air outlet 3a to supply air in a room with supply air radially diffused is attached to the first air outlet 3. An air outlet to blow air against the slab 8 with supply air radially diffused is attached to the second air outlet 4.
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