F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 11/08 (2006.01)
Patent
CA 2742191
In an air conditioning device (1) that includes: a PTC heater (55) in which, in a stable region (S1), when the temperature of the PTC heater (55) is increased, a resistance is decreased or is substantially constant whereas, in a rise region (S2), the resistance is rapidly increased when the temperature exceeds a rise temperature (T1); and an air blower (25) that generates an air current which exchanges heat with the PTC heater (55), and that performs a heating operation by discharging air heated by the PTC heater (55) into the room, when the temperature within the room is within a low temperature range including a region whose temperature is lower than a set temperature, the duty ratio is set at 100%, and the PTC heater (55) is driven in the rise region (S2), when the temperature within the room is within a high temperature range whose temperatures are higher than the set temperature, the PTC heater (55) is stopped, and when the temperature within the room is within an intermediate temperature range between the low temperature range and the high temperature range, the duty ratio is set at a predetermined duty ratio, and the PTC heater (55) is driven in the stable region (S1).
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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