Interior temperature control system

An interior temperature control system comprising a top light T1, a ceiling fan T2 and an air-conditioner T3 that are installed in or on a house 1, and a controller C for controlling the internal temperature by performing computing, and selectively opening and closing the top light T1, selectively rotating the ceiling fan T2 in one or the opposite direction, and selectively activating and deactivating the air-conditioner T3, based on signals from a temperature sensor D1 provided at an upper portion of the room, a temperature sensor D2 provided at a lower portion of the room, and a temperature sensor D3 provided outside the room, in the following steps:

• (1) the step of determining the difference X between the temperatures of the upper and lower portions of the room, the difference Y between the temperatures inside and outside the room, and the difference Z between the internal temperature and the predetermined temperature, based on input signals from the temperature sensors D1, D2 and D3;
• (2) the step of determining whether the difference X is not less than K1 (constant value);
• (3) the step of determining whether the difference Y is less than K2 (constant value) if in the step (2), the difference X is not less than K1;
• (4) the step of determining whether the difference Z is less than K3 (constant value) if in the step (3), the difference Y is determined to be less than K2;
• (5) the step of deactivating the ceiling fan T2, opening the top light T1 to introduce outer air into the room, and deactivating the air-conditioner T3 if in the step (4), the difference Z is determined to be less than K3 (constant value);
• (6) the step of turning the ceiling fan T2, thereby generating an upward air current, opening the top light T1, thereby replacing air in the room with outer air, and deactivating the air-conditioner T3 if in the step (4), the difference Z is determined to be not less than K3 (constant value);
• (7) the step of determining whether the difference Z is less than K3 (constant value) if in the step (3), the difference Y is determined to be not less than K2;
• (8) the step of deactivating the ceiling fan T2 and closing the top light T1 if in the step (7), the difference Z is determined to be less than K3 (constant value);
• (9) the step of turning the ceiling fan T2, thereby generating an upward air current, opening the top light T1 for ventilation with the ceiling fan T2, and activating the air-conditioner for cooling, if in the step (7), the difference Z is determined to be not less than K3 (constant value);
• (10) the step of determining whether the difference Y is not less than K2 (constant value) if in the step (2), the difference X is less than K1;
• (11) the step of determining whether the difference Z is less than K3 (constant value) if in the step (10), the difference Y is determined to be not less than K2 (constant value);
• (12) the step of deactivating the ceiling fan T2, closing the top light T1, and deactivating the air-conditioner T3 if in the step (11), the difference Z is determined to be less than K3 (constant value);
• (13) the step of turning the ceiling fan T2, thereby generating an upward air current, opening the top light T1 for ventilation with the ceiling fan T2, and keeping the air-conditioner T3 deactivated, if in the step (11), the difference Z is determined to be not less than K3 (constant value);
• (14) the step of determining whether the difference Z is less than K3 (constant value) if in the step (10), the difference Y is determined to be less than K2 (constant value);
• (15) the step of deactivating the ceiling fan T2, closing the top light T1, and deactivating the air-conditioner T3 if in the step (14), the difference Z is determined to be less than K3 (constant value);
• and
• (16) the step of turning the ceiling fan T2, thereby generating a downward air current, closing the top light T1, and activating the air-conditioner T3 for cooling if in the step (14), the difference Z is determined to be not less than K3 (constant value).