Patent ID: 8074636
Filing Date: 2011-12-13
Classification: F24H,Y02B

Abstract:
1. A warm air furnace, comprising: a heating source; an air blow fan which blows out air heated by the heating source into a room; a temperature sensor which detects the room temperature; a set temperature input unit which inputs a set temperature; a target temperature setting unit for setting the set temperature input to the set temperature input unit as an initial target temperature; a heating mount decision unit which decides a heating amount of the heating source, so that a detected temperature by the temperature sensor coincides with the target temperature; an ecology operation setting unit which sets a saving operation function of making the target temperature setting unit set the target temperature decreased by a first predetermined temperature, after lapse of a predetermined time from a time when the detected temperature reaches the target temperature, and sets a moderate operation function of limiting the heating amount of the heating source, when the detected temperature is higher than the target temperature by a second predetermined temperature or more, until the detected temperature decreases to a heating resume temperature which is in a predetermined correspondence to the target temperature; and an ecology operation setting input unit which is capable of setting on and off of the ecology operation setting unit, wherein when the ecology operation setting unit limits the heating amount of the heating source, the target temperature setting unit maintains the target temperature until the detected temperature decreases to or below the heating resume temperature.