초록 ▼

This invention relates to a simplified, substantially self contained fuel savings control system for in-room air conditioner/heater units, which automatically turns off the power when the room is unoccupied. The system is typically contained in a single housing unit that may be plugged in between an

This invention relates to a simplified, substantially self contained fuel savings control system for in-room air conditioner/heater units, which automatically turns off the power when the room is unoccupied. The system is typically contained in a single housing unit that may be plugged in between an in-room power line outlet and a power cord to the heater-cooler unit. The system is universal in scope, being adaptable to different kinds of thermostatically controlled systems powered from a local power line. That is achieved, in part, by letting the temperature controls built into in-room thermostatically controlled units establish the temperature and controlling the power to the in-room units by sensing room occupancy and removing power when the room is unoccupied. This invention therefore represents an advance in the art, which affords a simplified low cost power control unit for automatically turning off power to the in-room heater-cooler unit when a room is unoccupied, and which constitutes a power control unit configured to minimize installation cost and rewiring of different kinds of in-room temperature control systems.

대표청구항 ▼

An automatic electrically powered thermostatless occupancy controlled power savings system for retrofit with a temperature controlled room system having an in-room thermostatic control unit for automatic control of room temperature, wherein said temperature controlled room systems are operated from

An automatic electrically powered thermostatless occupancy controlled power savings system for retrofit with a temperature controlled room system having an in-room thermostatic control unit for automatic control of room temperature, wherein said temperature controlled room systems are operated from a power line source within a room being temperature controlled, comprising in combination: an electrically powered wide angle motion detector adapted to detect motion of an occupant within a substantial portion of a room in which one of said room systems is installed, time delay means responsive to said motion detector for producing a signal representative of lack of room occupancy for a predetermined time period, and switching means for controlling power from said power line source to said temperature controlled room system in response to the time delay means signal, said power savings system thereby constituting in combination a substantially self contained unit for retrofit installation by connection between said power line and said room system to supply power to the room system wherein said time delay means further comprises an auxiliary timing system for providing a standby mode of operation with the unit connected to the power line for controlling said switching means to produce a predetermined off-on duty cycle time for the temperature control room system during unoccupancy of the room.