Patent ID: 8219252
Filing Date: 2012-07-10
Classification: F24F,G05B

Abstract:
1. A central air-conditioning system comprising: a single air-conditioning unit that generates heat exchange and outputs air generated by the heat exchange; a plurality of air-conditioning ducts that connect the air-conditioning system and a plurality of rooms of a house and allows the heat-exchanged air to pass therethrough; a plurality of open and close valves respectively arranged at each of the air-conditioning ducts to selectively open and close each of the air-conditioning ducts; a plurality of person detectors respectively arranged in each of the rooms to detect whether or not there is a person in each of the rooms and whether a person enters or exits each of the rooms; a plurality of temperature sensors respectively arranged in each of the rooms to detect temperature of each of the rooms; scheduling means that sets hour by hour a temperature control schedule used to control the temperature of each of the rooms at either an ordinary set temperature (T) or an energy-saving temperature (t) lower than the ordinary set temperature; and a controller that controls the temperature of each of the rooms by selectively opening and closing the open and close valves based on information indicative of both whether or not the person is present in each of the rooms and the temperature of each of the rooms detected by the temperature sensors, the controller functionally provides a presence checking process that checks, room by room, whether or not the person is present in the plurality of rooms; an ordinary conditioning mode process that makes a first flag ON to show that the presence checking process checks that there is a person in a room and controls the temperature of the occupied room in an ordinary temperature range (ΔT) into which the ordinary set temperature (T) falls; an unoccupied-room process that performs energy-saving conditioning in both an empty room checked by the presence checking process checks such that there is no person in the room and the occupied room whose temperature is already set to the energy-saving temperature (t), the energy-saving conditioning controlling the temperature at the energy-saving temperature (t); and a rapid conditioning mode transfer process that performs rapid conditioning for the room from the energy-saving temperature (t) to the ordinary set temperature (T), wherein the controller is configured to control the temperature of a targeted room which is repeatedly assigned to each of the plurality of rooms, during which the controller performs i) a determination process to determine whether or not there is a person in the targeted room, whether or not a person has entered the targeted room, and whether or not a person has exited the targeted room, and ii) the unoccupied-room process when it is determined by the determination process that there is no person in the targeted room, wherein each of the person detectors is configured to perform the detection by dividing an area of the targeted room into a plurality of monitoring areas, setting at least one of the divided monitoring areas as a doorway area to and from the targeted room, setting, of the divided monitoring areas, and a monitoring area adjacent to the doorway area as an adjacent monitoring area, such that each person detector detects whether or not there is a person in each of the plurality of divided monitoring areas, wherein the determination process is configured to wherein the controller is configured to