Controller and heating wire capable of preventing generation of electromagnetic waves
First Claim
1. A controller, having a safety device, for blocking electromagnetic waves, comprising:
- a switch unit connected to a heating cable that blocks electromagnetic waves and includes a first electrical heating wire and a second electrical heating wire, the switch unit determining whether to supply power;
a heating current U-turn and detection unit for causing power input from the first electrical heating wire to make a U-turn to the second electrical heating wire and detecting a signal, wherein the heating current U-turn and detection unit comprises;
a heating current U-turn unit including a U-turn resistor for connecting an end of the first electrical heating wire to an end of the second electrical heating wire; and
a U-turn current detection unit including a transistor, wherein the transistor of the U-turn current detection unit includes a base connected to both the U-turn resistor and the first electrical heating wire, an emitter connected to both the U-turn resistor and the second electrical heating wire, and a collector connected to a gate of the silicon controlled rectifier;
a fuse; and
a cutting operation unit for culling the fuse depending on the signal detected by the heating current U-turn and detection unit, wherein the cutting operation unit comprises a silicon controlled rectifier and a heating resistor, wherein the silicon controlled rectifier of the cutting operation unit includes a cathode connected to the emitter of the transistor, and an anode connected to the heating resistor, wherein the heating resistor cuts the fuse when heat is generated.
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Abstract
The present invention relates, in general, to a temperature controller and heating cable used for electric heating bedding, such as an electric blanket, electric papered floor or electric fomentation device, or warmers and, more particularly, to a controller having a safety device, which can immediately shut off the supply of power when the disconnection, breakage or local overheating of a heating cable occurs while preventing the generation of an induced magnetic field and the leakage of an electric field, in warmers, such as simple bedding or fomentation devices that are operated by allowing a user to simply control a heating temperature to a high or low level without measuring the temperature of a separate heating cable. The controller, having a safety device, for blocking electromagnetic waves includes a switch unit, a heating current U-turn and detection unit, a fuse, and a cutting operation unit.
12 Citations
17 Claims
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1. A controller, having a safety device, for blocking electromagnetic waves, comprising:
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a switch unit connected to a heating cable that blocks electromagnetic waves and includes a first electrical heating wire and a second electrical heating wire, the switch unit determining whether to supply power; a heating current U-turn and detection unit for causing power input from the first electrical heating wire to make a U-turn to the second electrical heating wire and detecting a signal, wherein the heating current U-turn and detection unit comprises; a heating current U-turn unit including a U-turn resistor for connecting an end of the first electrical heating wire to an end of the second electrical heating wire; and a U-turn current detection unit including a transistor, wherein the transistor of the U-turn current detection unit includes a base connected to both the U-turn resistor and the first electrical heating wire, an emitter connected to both the U-turn resistor and the second electrical heating wire, and a collector connected to a gate of the silicon controlled rectifier; a fuse; and a cutting operation unit for culling the fuse depending on the signal detected by the heating current U-turn and detection unit, wherein the cutting operation unit comprises a silicon controlled rectifier and a heating resistor, wherein the silicon controlled rectifier of the cutting operation unit includes a cathode connected to the emitter of the transistor, and an anode connected to the heating resistor, wherein the heating resistor cuts the fuse when heat is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification