Electric blanket

An electric blanket, comprising an electric blanket body and a power supply device for power supply and control;

• the power supply device including a power plug for electrical connection to an alternating-current electric power supply, a main control module for voltage conversion and control, and a first interface for electrical connection to the electric blanket body;
• the main control module including a main control circuit, an output control circuit, a voltage conversion circuit for converting the alternating-current electric power supply and a first communication power supply circuit for power supply and signal transmission and reception, the main control circuit being electrically connected to the output control circuit and the first communication power supply circuit, the output control circuit having an N3 terminal, the first communication power supply circuit having a COMM1 terminal and a GND1 terminal, the first interface having a first conductive terminal, a second conductive terminal and a third conductive terminal, the third conductive terminal being electrically connected to the N3 terminal, the first conductive terminal being electrically connected to the COMM1 terminal, the second conductive terminal being electrically connected to the GND1 terminal;
• a controller and a second interface being disposed on an outside of the electric blanket body, the second interface being pluggably connected to the first interface, the controller including a signal processing circuit, a function button circuit and a second communication power supply circuit for separating a power supply and a signal provided by the main control module, the signal processing circuit being electrically connected to the function button circuit and the second communication power supply circuit, the second communication power supply circuit having a COMM2 terminal and a GND2 terminal;
• the second interface having a fourth conductive terminal, a fifth conductive terminal and a sixth conductive terminal, the fourth conductive terminal being electrically connected to the COMM2 terminal, the fifth conductive terminal being electrically connected to the GND2 terminal;
• a heating load being disposed inside the electric blanket body, one end of the heating load being electrically connected to the sixth conductive terminal, another end of the heating load being electrically connected to the fifth conductive terminal;
• the first interface being connected to the second interface, the third conductive terminal being electrically connected to the sixth conductive terminal, the first conductive terminal being electrically connected to the fourth conductive terminal, the second conductive terminal being electrically connected to the fifth conductive terminal.