초록 ▼

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 sensor

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.

대표청구항 ▼

[ What is claimed is:] [24.] A heater comprising:a portable housing;heating element within the portable housing to heat living and other habitation spaces; and,at least one safety means selected from the group consisting of (i) motion detection means for determining whether motion is taking place ne

[ What is claimed is:] [24.] A heater comprising:a portable housing;heating element within the portable housing to heat living and other habitation spaces; and,at least one safety means selected from the group consisting of (i) motion detection means for determining whether motion is taking place near the heater, and for deenergizing the heating means in response to such motion; (ii) first temperature sensing element for determining an internal temperature of the heater, and for deenergizing the heating element in response to an abnormal condition manifested when the rate at which the internal temperature of the heater rises faster than a predetermined rate; (iii) second temperature sensing means for determining an internal temperature of the heater, and for deenergizing the heating element in response to an abnormal condition manifested when the internal temperature of the heater exceeds a predetermined upper limit temperature for safe operation of the heater; and, (iv) third temperature sensing means for determining an internal temperature of the heater, fourth temperature sensing means for determining the ambient temperature of the space in which the heater is located, and a comparison means for determining the difference between the internal temperature of the heater and the ambient temperature, and for deenergizing the heating element in response to an abnormal condition manifested when this difference exceeds a predetermined amount.