Warm air furnace
AssigneeRinnai Corporation
InventorsKazunori Nishio, Hayato Mizouchi
Life of this patent
Estimating the term…
Abstract
A warm air furnace capable of reliably carrying out a fuel consumption conserving operation regardless of a heating load is equipped with an ecology operation setting unit for setting a saving operation function and a moderate operation function. The saving operation function makes a target temperature setting unit decrease a target temperature by a first predetermined temperature after a lapse of a predetermined time after a room temperature reaches the target temperature. The moderate operation function limits a target combustion amount when the room temperature is higher than the target temperature by a second predetermined temperature or more. An eco-operation switch is capable of turning the ecology operation setting unit on and off.
Claims18
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.
A control unit for controlling a warm air furnace having a heating source and an air blow fan for blowing air heated by the heating source into a room, the control unit comprising:
- a temperature sensor configured to detect a room temperature of said room;
- a target temperature setting unit configured to set a target temperature;
- a combustion control unit configured to control a heating amount of the heating source such that the detected room temperature coincides with the target temperature;
- a moderate operation setting unit configured to control the combustion control unit to interrupt heating by the heating source when the detected room temperature is higher than the target temperature by at least a second predetermined temperature, and to maintain interruption of heating by the heating source until the detected room temperature decreases to a heating resume temperature which is in a predetermined correspondence to the target temperature;
- and
- a saving operation setting unit configured to control the target temperature setting unit to decrease the target temperature by a first predetermined temperature after lapse of a predetermined time from a time when the detected room temperature reaches the target temperature excepting periods during which heating by the heating source is interrupted by the moderate operation setting unit, during which time the target temperature is maintained.
Dependencies are inferred from the claim text.