Electronically-controlled heater

摘要

A heater, especially a portable electric space heater, that includes safety features selected from at least one of the following, which may turn off the heater or trigger an alarm or both: motion sensors for determining whether an object is within an unsafe distance of the heater; temperature sensors for determining whether the internal temperature of the heater is rising too fast, or is too much above ambient temperature so that it represents an unsafe condition, or is above a preset safe level.