AUTOMATIC OPERATION DEVICE FOR AIR FEEDING

• Main Author: SAKAHARA TAKASHI
• Format: Patent
• Language: English
• Published: 16.05.1989
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PURPOSE:To enable a stabilized ventilating operation in automatic mode by measuring a difference between indoor and outdoor atmospheric pressure, using both a sensor to detect higher differential pressure and a sensor to detect lower differential pressure, deciding a required rotary speed of an air feed fan, and controlling the amount of electricity turned. CONSTITUTION:At the time of operating an exhaust fan 2 installed to a discharge port 3 in a dwelling house 1, a differential pressure is generated between an interior 10 and an exterior 9. Then, a differential pressure is generated between an outdoor side detection port 8 provided in the exterior 9 of a room and an indoor side detection port 6 provided in the interior 10 of a room. As a result, when the differential pressure exceeds a specified higher value, the signals are transmitted to a detection member 21 from a higher differential pressure detection sensor 11, then to a microcomputer 22, and increases the quantity of air feed, gradually raising the rotary speed of the fan until the signals from the higher differential pressure detection sensor 11 come to a halt. When the discharge fan 2 comes to a halt, or the amount of discharge air is decreased, the differential pressure between the interior 10 and the exterior 9 of the dwelling house 1 is reduced. When the differential pressure falls below a specified lower value in proportion with the reduction in differential pressure, the signals will be transmitted to the detection member 21 from a lower differential pressure detection sensor 12, then to the microcomputer 22, thereby reducing the quantity of air supply.