Electric blanket with digital temperature sensors
First Claim
1. An electric blanket comprising:
- a substrate (11) made of cotton cloth;
a heating member (12) mounted on the substrate (11), the heating member including a fiber (121), a heating wire (122) wound around the fiber, an inner silicon rubber insulating layer (123) covering the fiber and the heating wire, and an outer silicon rubber insulating layer (124) covering the inner silicon rubber insulating layer;
a plurality of digital temperature sensors (15) mounted to the heating member (12) at a plurality of positions for detecting temperature of the heating member (12) at the positions and sending signals relating to the temperature of the heating member at the positions and indicating the positions;
a temperature protection switch (16) electrically connected in series to the heating member (12);
an electromagnetic radiation interference filter (27) electrically connected to an AC power source;
a DC power supply circuit (22) electrically connected to the electromagnetic radiation interference filter (27) for converting AC power source into a DC power supply;
a display (20) for displaying at least temperature of the electric blanket;
a zero-cross detector (R8) electrically connected to the DC power supply circuit;
a triac (23) electrically connected to the heating member (12); and
a central processing unit (21) electrically connected to the digital temperature sensors (15), the electromagnetic radiation interference filter (27), the DC power supply circuit (22), the zero-cross detector (R8), the triac (23), and the display (20);
the central processing unit (21) receiving and processing the signals from the digital temperature sensors and a feedback signal from the temperature protection switch (16) to control temperature of the electric blanket.
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Accused Products
Abstract
An electric blanket includes a substrate made of cotton cloth, a heating member mounted on the substrate, a plurality of digital temperature sensors mounted to the heating member at a plurality of positions for detecting temperature of the heating member at the positions and sending signals relating to the temperature of the heating member at the positions and indicating the positions, a temperature protection switch, an electromagnetic radiation interference filter electrically connected to an AC power source, a DC power supply circuit, a display for displaying at least temperature of the electric blanket, a zero-cross detector, a triac electrically connected to the heating member, and a central processing unit. The central processing unit receives and processes the signals from the digital temperature sensors and a feedback signal from the temperature protection switch to control temperature of the electric blanket.
16 Citations
10 Claims
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1. An electric blanket comprising:
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a substrate (11) made of cotton cloth; a heating member (12) mounted on the substrate (11), the heating member including a fiber (121), a heating wire (122) wound around the fiber, an inner silicon rubber insulating layer (123) covering the fiber and the heating wire, and an outer silicon rubber insulating layer (124) covering the inner silicon rubber insulating layer; a plurality of digital temperature sensors (15) mounted to the heating member (12) at a plurality of positions for detecting temperature of the heating member (12) at the positions and sending signals relating to the temperature of the heating member at the positions and indicating the positions; a temperature protection switch (16) electrically connected in series to the heating member (12); an electromagnetic radiation interference filter (27) electrically connected to an AC power source; a DC power supply circuit (22) electrically connected to the electromagnetic radiation interference filter (27) for converting AC power source into a DC power supply; a display (20) for displaying at least temperature of the electric blanket; a zero-cross detector (R8) electrically connected to the DC power supply circuit; a triac (23) electrically connected to the heating member (12); and a central processing unit (21) electrically connected to the digital temperature sensors (15), the electromagnetic radiation interference filter (27), the DC power supply circuit (22), the zero-cross detector (R8), the triac (23), and the display (20); the central processing unit (21) receiving and processing the signals from the digital temperature sensors and a feedback signal from the temperature protection switch (16) to control temperature of the electric blanket. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification