Electric blanket control circuit

Abstract

The present invention discloses an electric blanket control circuit, including a main control circuit composed of a relatively low-voltage power conversion circuit, a heating main loop circuit, an MCU main control circuit, an active and passive protection circuit, and a main power carrier serial port circuit; and also includes a sub-control circuit; the sub-control circuit is composed of a sub-power carrier serial port circuit, a sub-control power extraction circuit, an MCU sub-control circuit, a function key input circuit, and a display circuit; the main control circuit and the sub-control circuit exchange heating state information and control information through the main power carrier serial port circuit and the sub-power carrier serial port circuit to realize the heating control of the electric blanket in a mutually coordinated control manner. The control circuit control method of the present invention is simple, and can better increase the user experience of product operation.

Description

Technical Field

[0001] The invention relates to a temperature control technology of an electric heating body, in particular to an electric blanket control circuit. Background Art

[0002] At present, traditional electric heating products such as heating pads and electric blankets at home and abroad are connected to a controller through a line, and the controller is connected to a power plug through the line. Due to the design of the internal control circuit of this controller, its size is relatively large. When using the electric blanket, it is like dragging a burden with the controller, which is very inconvenient. It also affects the beauty of the entire blanket and greatly reduces people's experience of use. In order to make the operation of the electric heating blanket more convenient, it is necessary to redesign the control circuit of the electric heating blanket. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electric blanket control circuit for controlling the heating of the electric blanket through an interactive control method in view of the above technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] An electric blanket control circuit comprises a main control circuit composed of a relatively low-voltage power conversion circuit, a heating main loop circuit, an MCU main control circuit, active and passive protection circuits and a main power carrier serial port circuit; and also comprises a sub-control circuit; the sub-control circuit consists of a sub-power carrier serial port circuit, a sub-control power extraction circuit, an MCU sub-control circuit, a function key input circuit and a display circuit; the main control circuit and the sub-control circuit exchange heating state information and control information through the main power carrier serial port circuit and the sub-power carrier serial port circuit to realize heating control of the electric blanket in a mutually coordinated control manner.

[0006] To optimize the above technical solutions, the specific measures taken also include:

[0007] The above-mentioned MCU main control circuit includes a main MCU with 20 pins for controlling each output point to be turned on or off according to a predetermined program algorithm. The first pin of the main MCU is grounded, the 20th pin of the main MCU is connected to the positive 5V output terminal of the relatively low-voltage power conversion circuit, and a capacitor C4 is arranged between the first and 20th pins. The 19th pin of the main MCU is connected to the first end of the resistor R20, the second end of the resistor R20 is connected to the first end of the resistor R19 and the cathode of the voltage-stabilizing diode ZD2, the anode of the voltage-stabilizing diode ZD2 is grounded, and the second end of the resistor R19 is connected to the resistor The second end of R17 is connected to the ACN terminal in common, the first end of resistor R17 is connected to pin 16 of the main MCU, the first end of capacitor C5 and the first end of resistor 18, the second end of capacitor C5 and the second end of resistor 18 are both grounded, the pin 6 of the main MCU is connected to the first end of resistor R21, the second end of resistor R21 is connected to the anode of light-emitting diode LED1, and the cathode of light-emitting diode LED1 is grounded; the first end of relay J1 is connected to the positive 5 volt output terminal, the second end of relay J1 is connected to pin 18 of the main MCU, and the third end of relay J1 is grounded.

[0008] The relatively low voltage power conversion circuit comprises a short circuit protection circuit, an over-temperature failure protection circuit, an EMC anti-interference circuit, a resistance-capacitance step-down circuit and a 5V linear voltage transformation circuit, which are composed of an element F1, a fuse FT1, a variable resistor RV1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a rectifier diode D1, a voltage regulator diode ZD1, an electrolytic capacitor E1, a capacitor C2, a capacitor C3, a resistor R4 and a voltage regulator module IC1; the first end of the fuse FT1 is connected to the live wire terminal ACL of the AC power supply, the second end of the fuse FT1 is connected to the first end of the element F1, the second end of the element F1 and the second end of the variable resistor RV1, the second end of the capacitor CX1, the second end of the resistor R1, the anode of the voltage regulator diode ZD1, the negative electrode of the electrolytic capacitor E1, the capacitor C2 The second end of the voltage stabilizing module IC1, the second end of the capacitor C3 and the second end of the resistor R4 are all grounded, the first end of the variable resistor RV1, the first end of the capacitor CX1, the first end of the resistor R1 and the first end of the resistor R2 are all connected to the neutral line terminal ACN of the AC power supply, the second end of the resistor R2 is connected to the first end of the resistor R3 and the first end of the capacitor C1, the second end of the resistor R3 and the second end of the capacitor C1 are connected in common with the cathode of the voltage stabilizing diode ZD1 and the anode of the rectifier diode D1, the cathode of the rectifier diode D1, the positive electrode of the electrolytic capacitor E1, the first end of the capacitor C2 and the third pin of the voltage stabilizing module IC1 are connected in common to output a positive voltage of 7.5 volts, and the first pin of the voltage stabilizing module IC1, the first end of the capacitor C3 and the first end of the resistor R4 are connected in common to output a stable positive voltage of 5 volts.

[0009] The above-mentioned heating main loop circuit is composed of resistor R5, resistor R6, electronic component IC, resistor R7, resistor R8, main thyristor SCR1, load current sampling resistor R10, resistor R11, capacitor C7 and PTC / NTC heating wire of the electric blanket; the active and passive protection circuit (A4) is composed of line-connected resistor R14, thyristor SCR2, resistor 15, resistor 16 and resistor 9, resistor 12, resistor 13 and capacitor C6; the second end of the resistor 12, the first end of the resistor 13 and the first end of the capacitor C6 are all connected to the 13th pin of the main MCU, and the first end of the resistor R15 is connected to the 3rd pin of the main MCU.

[0010] The above-mentioned main power supply carrier serial port circuit is composed of line-connected resistor R22, resistor R23, tube Q1, tube Q2, relay J2, resistor R24, resistor R25, resistor R26, resistor R27, resistor R28, resistor R29, tube Q3 and resistor R30.

[0011] The above-mentioned auxiliary power supply carrier serial port circuit line is composed of a relay J3, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R54, a tube Q4, a tube Q5, a resistor R55, and a resistor R56 connected in the line; the auxiliary control power supply extraction circuit (B2) is composed of a diode D2, a capacitor C11, a capacitor C12, a capacitor C13, a voltage stabilizing module IC2 and a capacitor C14.

[0012] The above-mentioned MCU sub-control circuit includes a sub-MCU with 20 pins, a capacitor C15 and a relay J4. The first pin of the sub-MCU and the first end of the capacitor C15 are commonly grounded, and the second end of the capacitor C15 and the 20th pin of the sub-MCU are commonly connected to the positive 3 volt end of the sub-control power extraction circuit; the first pin of the relay J4 is connected to the positive 3 volt end of the sub-control power extraction circuit, the second pin of the relay J4 is connected to the 18th pin of the sub-MCU, and the third pin of the relay J4 is grounded.

[0013] The above-mentioned function key input circuit is composed of a line-connected button SW-PB and a resistor R60. The second contact of the button SW-PB is grounded, the first contact of the button SW-PB is connected to the second end of the resistor R60, and the first end of the resistor R60 is connected to the 5th pin of the sub-MCU.

[0014] The above-mentioned display circuit is composed of line-connected resistors R71, R72, R73, R74, R75, R76, R77 and display SEG; the first end of resistor R71 is connected to pin 15 of the sub-MCU, and the second end of resistor R71 is connected to pin 1 of the display SEG; the first end of resistor R72 is connected to pin 16 of the sub-MCU, and the second end of resistor R72 is connected to pin 2 of the display SEG; the third pin of the display SEG is connected to the positive 3V terminal of the sub-control power extraction circuit; the first end of resistor R73 is connected to pin 17 of the sub-MCU, and the second end of resistor R72 is connected to pin 4 of the display SEG; the display The 5th pin of the display SEG is left unused; the first end of the resistor R74 is connected to the 10th pin of the display SEG, and the second end of the resistor R74 is connected to the 14th pin of the sub-MCU; the first end of the resistor R75 is connected to the 9th pin of the display SEG, and the second end of the resistor R75 is connected to the 13th pin of the sub-MCU; the 8th pin of the display SEG is connected to the positive 3V end of the sub-control power extraction circuit; the first end of the resistor R76 is connected to the 7th pin of the display SEG, and the second end of the resistor R76 is connected to the 12th pin of the sub-MCU; the first end of the resistor R77 is connected to the 6th pin of the display SEG, and the second end of the resistor R77 is connected to the 11th pin of the sub-MCU.

[0015] Compared with the prior art, the electric blanket control circuit of the present invention consists of two parts: a main control circuit and a sub-control circuit; the main control circuit includes a relatively low-voltage power conversion circuit, a heating main loop circuit, an MCU main control circuit, an active and passive protection circuit, and a main power carrier serial port circuit; the sub-control circuit includes a sub-power carrier serial port circuit, a sub-control power extraction circuit, an MCU sub-control circuit, a function key input circuit, and a display circuit. The main control circuit and the sub-control circuit control the heating of the electric heating product in a mutually coordinated control manner. The sub-control circuit is mainly responsible for collecting the user's control intention and displaying the current working status of the heating product. The main control circuit controls the heating of the heating product according to the control intention collected by the sub-control circuit, and at the same time sends the collected current working status of the heating product to the sub-control circuit, which is displayed on the display of the sub-control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the main control circuit of the present invention;

[0017] Figure 2 is a schematic diagram of a secondary control circuit of the present invention;

[0018] Figure 3 yes Figure 1 Circuit diagram of medium to low voltage power conversion circuit;

[0019] Figure 4 yes Figure 1Circuit diagram of the heating main circuit;

[0020] Figure 5 yes Figure 1 Circuit diagram of MCU main control circuit;

[0021] Figure 6 yes Figure 1 Circuit diagram of active and passive protection circuit;

[0022] Figure 7 yes Figure 1 Circuit diagram of the main power supply carrier serial port circuit;

[0023] Figure 8 yes Figure 2 Circuit diagram of the secondary power supply carrier serial port circuit and the secondary control power supply extraction circuit;

[0024] Fig. 9 yes Figure 2 Circuit diagram of MCU sub-control circuit;

[0025] Fig.10 yes Figure 2 Circuit diagram of the function key input circuit;

[0026] Fig.11 yes Figure 2 A circuit diagram of the circuit is shown in FIG. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0028] Figures 1 to 11 It is a circuit diagram of the present invention.

[0029] In the prior art, heating products such as electric heating blankets and heating pads all have a cumbersome controller, which makes such heating products very inconvenient to use. In order to make the heating products more convenient to use and the blankets lighter and more beautiful, it is necessary to redesign the traditional controller, and the design of the controller is mainly its control circuit. To this end, the present invention proposes an electric heating blanket control circuit that uses a control method that interacts between the main control and the auxiliary control to control the normal operation of the electric heating product. The control circuit includes a main control circuit and an auxiliary control circuit, that is, a main control and an auxiliary control. A microprocessor MCU is provided in the main control circuit and the auxiliary control circuit. For the convenience of explanation, the microprocessor MCU in the main control circuit is hereinafter referred to as the main MCU, and the microprocessor MCU in the auxiliary control circuit is hereinafter referred to as the auxiliary MCU. The main control circuit is composed of a relatively low-voltage power conversion circuit A1, a heating main loop circuit A2, an MCU main control circuit A3, an active and passive protection circuit A4, and a main power carrier serial port circuit A5. The auxiliary control circuit is composed of an auxiliary power carrier serial port circuit B1, an auxiliary control power extraction circuit B2, an MCU auxiliary control circuit B3, a function key input circuit B4, and a display circuit B5. The main control circuit and the auxiliary control circuit exchange heating state information and control information through the main power carrier serial port circuit A5 and the auxiliary power carrier serial port circuit B1 to realize the heating control of the electric blanket in a mutually coordinated control manner.

[0030] Figure 3 It is a circuit diagram of a relatively low-voltage power conversion circuit in the main control circuit of the present invention. The function of the relatively low-voltage power conversion circuit A1 is to provide relatively low-voltage conversion for the main MCU and the sub-control, and finally obtain a DC5V power supply. The relatively low-voltage power conversion circuit A1 is composed of a line-connected element F1, a fuse FT1, a variable resistor RV1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a rectifier diode D1, a voltage regulator diode ZD1, an electrolytic capacitor E1, a capacitor C2, a capacitor C3, a resistor R4 and a voltage regulator module IC1, which constitute a short-circuit protection circuit, an over-temperature failure protection circuit, an EMC anti-interference circuit, a resistor-capacitor step-down circuit and a 5V linear voltage transformer circuit. From Figure 3It can be seen that the first end of the fuse FT1 is connected to the live wire terminal ACL of the AC power supply, the second end of the fuse FT1 is connected to the first end of the component F1, the second end of the component F1 and the second end of the variable resistor RV1, the second end of the capacitor CX1, the second end of the resistor R1, the anode of the Zener diode ZD1, the cathode of the electrolytic capacitor E1, the second end of the capacitor C2, the second pin of the voltage stabilizing module IC1, the second end of the capacitor C3 and the second end of the resistor R4 are all grounded. The first end of the variable resistor RV1, the second end of the capacitor CX1, the first end of the resistor R1 and the first end of the resistor R2 are all connected to the neutral line terminal ACN of the AC power supply, the second end of the resistor R2 is connected to the first end of the resistor R3 and the first end of the capacitor C1, the second end of the resistor R3 and the second end of the capacitor C1 are connected in common with the cathode of the voltage-stabilizing diode ZD1 and the anode of the rectifier diode D1, the cathode of the rectifier diode D1, the positive electrode of the electrolytic capacitor E1, the first end of the capacitor C2 and the third pin of the voltage-stabilizing module IC1 are connected in common to output a positive voltage of 7.5 volts, and the first pin of the voltage-stabilizing module IC1, the first end of the capacitor C3 and the first end of the resistor R4 are connected in common to output a stable positive voltage of 5 volts.

[0031] Figure 4 The main heating circuit A2 is composed of resistor R5, resistor R6, electronic component IC, resistor R7, resistor R8, main thyristor SCR1, load current sampling resistor R10, resistor R11, capacitor C7 and PTC / NTC heating wire of electric blanket. Figure 6 It is a circuit diagram of the active and passive protection circuit of the present invention. The active and passive protection circuit A4 is composed of a line-connected resistor R14, a thyristor SCR2, a resistor 15, a resistor 16, a resistor 9, a resistor 12, a resistor 13 and a capacitor C6; the second end of the resistor 12, the first end of the resistor 13 and the first end of the capacitor C6 are all connected to the 13th pin of the main MCU, and the first end of the resistor R15 is connected to the 3rd pin of the main MCU. The working current of the electric blanket PTC / NTC heating line forms a main loop through the main thyristor SCR1 and the load current sampling resistor R10 in series. The main MCU calculates the current temperature of the blanket by a certain program algorithm by detecting the working current on the load current sampling resistor R10, and controls the main thyristor SCR1 to open or close to control the PTC / NTC heating line to work or not work through the resistor R5 drive electronic component IC, thereby achieving the purpose of controlling the heating temperature of the blanket. In addition, the heating line detection layer, the resistor R9, the resistor R12 and the resistor R13 together form an NTC signal detection circuit.

[0032] The MCU main control circuit A3 of the present invention includes the above-mentioned main MCU, which has 20 pins and is responsible for collecting power supply voltage, load current, power supply frequency, fault information, and controlling the opening or closing of each output point according to a predetermined program algorithm; receiving and processing control information sent by the sub-controller, and sending the working status information of the heating product to the sub-controller, playing the role of a product control center. The first pin of the main MCU is grounded, the 20th pin of the main MCU is connected to the positive 5V output end of the relatively low-voltage power conversion circuit, a capacitor C4 is arranged between the first pin and the 20th pin, the 19th pin of the main MCU is connected to the first end of the resistor R20, the second end of the resistor R20 is connected to the first end of the resistor R19 and the cathode of the voltage-stabilizing diode ZD2, the anode of the voltage-stabilizing diode ZD2 is grounded, the second end of the resistor R19 and the second end of the resistor R17 are connected to the ACN end, the first end of the resistor R17 is connected to the 16th pin of the main MCU, the first end of the capacitor C5 and the first end of the resistor 18, the second end of the capacitor C5 and the second end of the resistor 18 are both grounded, the 6th pin of the main MCU is connected to the first end of the resistor R21, the second end of the resistor R21 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is grounded; the first end of the relay J1 is connected to the positive 5V output end, the second end of the relay J1 is connected to the 18th pin of the main MCU, and the third end of the relay J1 is grounded.

[0033] The active and passive protection circuit of the present invention is used to play a circuit protection role, wherein:

[0034] a. Active protection: When the main thyristor SCR1 is short-circuited and not controlled by the main MCU, which may cause the heating product to have an overall high temperature safety problem, the main MCU will drive the thyristor SCR2, turn on the resistor R14 to generate heat and burn out the temperature fuse FT1, and disconnect the main power supply for protection.

[0035] b. Passive protection: When the heating product may cause leakage of the inner and outer layers at one or more points of the heating line due to some reasons, a high voltage drop will appear on the resistor R9, causing heat to burn out the temperature fuse FT1, disconnecting the main power supply to play a protective role.

[0036] The auxiliary power supply carrier serial port circuit line B1 is composed of relay J3, resistor R50, resistor R51, resistor R52, resistor R53, resistor R54, tube Q4, tube Q5, resistor R55, and resistor R56 connected in the line. The main control circuit and the auxiliary control circuit exchange the status information of the heating product collected by the main control and the control information collected by the auxiliary control through the main power supply carrier serial port circuit A5 and the auxiliary power supply carrier serial port circuit B1, and finally achieve the purpose of the main MCU and the auxiliary MCU to coordinate and control the normal operation of the entire heating product. The auxiliary control power extraction circuit B2 is composed of a diode D2, a capacitor C11, a capacitor C12, a capacitor C13, a voltage regulator module IC2, and a capacitor C14. The auxiliary control power extraction circuit B2 extracts the power required by the auxiliary control from the main power supply carrier serial port of the main control circuit, and finally outputs a DC3.0V voltage, and ensures the normal operation of the auxiliary control.

[0037] The MCU sub-control circuit B3 of the present invention comprises a sub-MCU with 20 pins, a capacitor C15 and a relay J4, the first pin of the sub-MCU and the first end of the capacitor C15 are grounded together, the second end of the capacitor C15 and the 20th pin of the sub-MCU are connected to the positive 3 volt end of the sub-control power extraction circuit; the first pin of the relay J4 is connected to the positive 3 volt end of the sub-control power extraction circuit, the second pin of the relay J4 is connected to the 18th pin of the sub-MCU, and the third pin of the relay J4 is grounded. The MCU sub-control circuit B3 is responsible for collecting the control information that the user wants through the button SW-PB, and sending it to the main control through the sub-power carrier serial port; at the same time, the sub-power carrier serial port receives the working status information of the heating product sent by the main control, and displays it on the display SEG according to this information.

[0038] The function key input circuit B4 of the present invention is composed of a button SW-PB and a resistor R60 connected by a line. The second contact of the button SW-PB is grounded, the first contact of the button SW-PB is connected to the second end of the resistor R60, and the first end of the resistor R60 is connected to the 5th pin of the sub-MCU. The user of the heating product can input the desired product control information through the button SW-PB. By pressing the button SW-PB, the power on and off and the adjustment of the heating gear can be controlled.

[0039] The display circuit B5 of the present invention is composed of a resistor R71, a resistor R72, a resistor R73, a resistor R74, a resistor R75, a resistor R76, a resistor R77 and a display SEG connected in a line; the first end of the resistor R71 is connected to the 15th pin of the sub-MCU, and the second end of the resistor R71 is connected to the 1st pin of the display SEG; the first end of the resistor R72 is connected to the 16th pin of the sub-MCU, and the second end of the resistor R72 is connected to the 2nd pin of the display SEG; the 3rd pin of the display SEG is connected to the positive 3V terminal of the sub-control power supply extraction circuit; the first end of the resistor R73 is connected to the 17th pin of the sub-MCU, and the second end of the resistor R72 is connected to the 4th pin of the display SEG; The 5th pin of the display SEG is left unused; the first end of the resistor R74 is connected to the 10th pin of the display SEG, and the second end of the resistor R74 is connected to the 14th pin of the sub-MCU; the first end of the resistor R75 is connected to the 9th pin of the display SEG, and the second end of the resistor R75 is connected to the 13th pin of the sub-MCU; the 8th pin of the display SEG is connected to the positive 3V end of the sub-control power extraction circuit; the first end of the resistor R76 is connected to the 7th pin of the display SEG, and the second end of the resistor R76 is connected to the 12th pin of the sub-MCU; the first end of the resistor R77 is connected to the 6th pin of the display SEG, and the second end of the resistor R77 is connected to the 11th pin of the sub-MCU. The display circuit B5 is used to display the current working status of the heating product, including heating gear, product failure and other information.

[0040] The main control circuit of the control circuit of the present invention can be designed in a wall adapter type controller, and the auxiliary control circuit can be designed in a silicone button. The silicone button can be sewn on the heating blanket body. The wall adapter type controller is directly connected to the heating blanket body through a data cable, which can reduce the weight of the traditional controller dragged on the heating blanket body, thereby increasing the user's operation and usage experience.

[0041] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. An electric blanket control circuit, comprising a main control circuit consisting of a relatively low voltage power conversion circuit (A1), a heating main loop circuit (A2), an MCU main control circuit (A3), an active and passive protection circuit (A4) and a main power supply carrier serial port circuit (A5); wherein: Also includes Auxiliary control circuit; the auxiliary control circuit is composed of an auxiliary power supply carrier serial port circuit (B1), an auxiliary control power extraction circuit (B2), an MCU auxiliary control circuit (B3), a function key input circuit (B4) and a display circuit (B5); the main control circuit is arranged in a wall-plug adapter type controller, the auxiliary control circuit is arranged in a silicone key, and the silicone key is sewn on the heating blanket body. The main control circuit and the auxiliary control circuit exchange heating state information and control information through the main power supply carrier serial port circuit (A5) and the auxiliary power supply carrier serial port circuit (B1) to realize the heating control of the electric blanket in a mutually coordinated control manner.

2. The electric blanket control circuit according to claim 1, characterized in that: The MCU main control circuit (A3) includes a main MCU with 20 pins for controlling each output point to be turned on or off according to a predetermined program algorithm, the first pin of the main MCU is grounded, the 20th pin of the main MCU is connected to the positive 5V output terminal of the relatively low-voltage power conversion circuit, a capacitor C4 is arranged between the first pin and the 20th pin, the 19th pin of the main MCU is connected to the first end of the resistor R20, the second end of the resistor R20 is connected to the first end of the resistor R19 and the cathode of the voltage-stabilizing diode ZD2, the anode of the voltage-stabilizing diode ZD2 is grounded, and the second end of the resistor R19 is connected to the ground. The ACN terminal is connected together with the second end of the resistor R17, the first end of the resistor R17 is connected to the 16th pin of the main MCU, the first end of the capacitor C5 and the first end of the resistor R18, the second end of the capacitor C5 and the second end of the resistor R18 are both grounded, the 6th pin of the main MCU is connected to the first end of the resistor R21, the second end of the resistor R21 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is grounded; the first end of the relay J1 is connected to the positive 5V output terminal, the second end of the relay J1 is connected to the 18th pin of the main MCU, and the third end of the relay J1 is grounded.

3. The electric blanket control circuit according to claim 2, characterized in that: The relatively low voltage power conversion circuit (A1) comprises a short circuit protection circuit, an over-temperature failure protection circuit, an EMC anti-interference circuit, a resistance-capacitance step-down circuit and a 5V linear voltage transformation circuit, which are composed of an element F1, a fuse FT1, a variable resistor RV1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a rectifier diode D1, a voltage regulator diode ZD1, an electrolytic capacitor E1, a capacitor C2, a capacitor C3, a resistor R4 and a voltage regulator module IC1; the first end of the fuse FT1 is connected to the live wire end ACL of the AC power supply, the second end of the fuse FT1 is connected to the first end of the element F1, the second end of the element F1 and the second end of the variable resistor RV1, the second end of the capacitor CX1, the second end of the resistor R1, the anode of the voltage regulator diode ZD1, the cathode of the electrolytic capacitor E1, the capacitor The second end of C2, the second pin of the voltage stabilizing module IC1, the second end of the capacitor C3 and the second end of the resistor R4 are all grounded, the first end of the variable resistor RV1, the first end of the capacitor CX1, the first end of the resistor R1 and the first end of the resistor R2 are all connected to the neutral line terminal ACN of the AC power supply, the second end of the resistor R2 is connected to the first end of the resistor R3 and the first end of the capacitor C1, the second end of the resistor R3 and the second end of the capacitor C1 are connected in common with the cathode of the voltage stabilizing diode ZD1 and the anode of the rectifier diode D1, the cathode of the rectifier diode D1, the positive electrode of the electrolytic capacitor E1, the first end of the capacitor C2 and the third pin of the voltage stabilizing module IC1 are connected in common to output a positive voltage of 7.5 volts, and the first pin of the voltage stabilizing module IC1, the first end of the capacitor C3 and the first end of the resistor R4 are connected in common to output a stable positive voltage of 5 volts.

4. The electric blanket control circuit according to claim 3, characterized in that: The heating main loop circuit (A2) is composed of a resistor R5, a resistor R6, an electronic component IC, a resistor R7, a resistor R8, a main thyristor SCR1, a load current sampling resistor R10, a resistor R11, a capacitor C7 and a PTC / NTC heating wire of an electric blanket; the active and passive protection circuit (A4) is composed of a line-connected resistor R14, a thyristor SCR2, a resistor R15, a resistor R16, a resistor R9, a resistor R12, a resistor R13 and a capacitor C6; the second end of the resistor R12, the first end of the resistor R13 and the first end of the capacitor C6 are all connected to the 13th pin of the main MCU, and the first end of the resistor R15 is connected to the 3rd pin of the main MCU; the first end of the resistor R5 is connected to the 2nd pin of the main MCU, the second end of the resistor R5 and the first end of the resistor R6 are connected to the first input end of the electronic component IC, and the resistor R14 is connected to the 13th pin of the main MCU, and the first end of the resistor R13 and the first end of the capacitor C6 are ...3 and the first end of the capacitor C6 are connected to the 13th pin of the main MCU, and the first end of the resistor R13 and the first end of the capacitor C6 are connected to the 1 The second end of R6 is connected to the first output end of the electronic component IC and is grounded. The second output end of the electronic component IC is connected to the neutral line terminal ACN of the AC power supply. The neutral line terminal ACN of the AC power supply is also connected to the main circuit terminal T2 of the main thyristor SCR1. The third output end of the electronic component IC is connected to the first end of the upper resistor R7 controlled by the main thyristor SCR1. The second end of the resistor R7 and the first end of the lower resistor R8 controlled by the main thyristor SCR1 are connected to the control gate G end of the main thyristor SCR1. The second end of the resistor R8 and the main circuit terminal T1 of the main thyristor SCR1 are connected to the fourth end of the PTC / NTC heating wire. The third end of the PTC / NTC heating wire is connected to the first end of the load current sampling resistor R10 and the first end of the resistor R11. The second end of the resistor R11 is connected to the first end of the capacitor C7. The second ends of the capacitor C7 and the resistor R10 are grounded respectively.

5. The electric blanket control circuit according to claim 4, characterized in that: The main power supply carrier serial port circuit (A5) is composed of a line-connected resistor R22, a resistor R23, a tube Q1, a tube Q2, a relay J2, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a tube Q3 and a resistor R30; the first end of the resistor R22 and the first end of the resistor R23 are both connected to the first power supply, the second end of the resistor R22 and the second end of the resistor R23 are both connected to the drain of the tube Q1, the drain of the tube Q2 and the source of the tube Q1 are both connected to the first end of the resistor R24, the first end of the resistor R24 ​​is also connected to the first pin of the relay J2, the second end of the resistor R24 ​​and the resistor R30 are connected to the first pin of the relay J2, and the second end of the resistor R24 ​​and the resistor R30 are connected to the first power supply. The first end of 25 is connected to the 8th pin of the main MCU, the gate of tube Q1 is connected to the first end of resistor R29, the first end of resistor R26 and the second power supply, the 7th pin of the main MTU is connected to the second end of resistor R26 and the first end of resistor R27, the second end of resistor R27 is connected to the base of tube Q3 and the first end of resistor R28, the second end of resistor R29 is connected to the gate of tube Q2 and the first end of resistor R30 and the collector of tube Q3, the emitter of tube Q3, the second end of resistor R30, the source of Q2, the second end of resistor R28, and the second end of resistor R25 are grounded, and the 2nd pin of relay J2 is connected to the heating main loop circuit (A2).

6. The electric blanket control circuit according to claim 5, characterized in that: The auxiliary power supply carrier serial port circuit (B1) is composed of a relay J3, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R54, a tube Q4, a tube Q5, a resistor R55, and a resistor R56 connected in a line; the auxiliary control power supply extraction circuit (B2) is composed of a diode D2, a capacitor C11, a capacitor C12, a capacitor C13, a voltage stabilizing module IC2, and a capacitor C14; the first pin of the relay J3 is connected to the drain of the tube Q4, the source of the tube Q4 is grounded, the gate of the tube Q4 is respectively connected to the first end of the resistor R53, the first end of the resistor R54, and the collector of the transistor Q5, the second end of the resistor R53 is connected to a positive 3V voltage, and the base of the transistor Q5 is respectively connected to the first end of the resistor R51 and the collector of the transistor Q5. The first end of the relay J3 is connected to the input end of the diode D2, the output end of the diode D2 is respectively connected to the second end of the voltage stabilizing module IC2 and the first end of the capacitor C11, the capacitor C12 and the capacitor C13, the third end of the voltage stabilizing module IC2 and the first end of the capacitor C14 are connected to the positive 3V voltage, the second ends of the capacitors C11, C12 and C13, the first end of the voltage stabilizing module IC2 and the second end of the capacitor C14 are grounded.

7. The electric blanket control circuit according to claim 6, characterized in that: The MCU sub-control circuit (B3) includes a sub-MCU with 20 pins, a capacitor C15 and a relay J4, the first pin of the sub-MCU and the first end of the capacitor C15 are commonly grounded, the second end of the capacitor C15 and the 20th pin of the sub-MCU are commonly connected to the positive 3 volt end of the sub-control power extraction circuit; the first pin of the relay J4 is connected to the positive 3 volt end of the sub-control power extraction circuit, the second pin of the relay J4 is connected to the 18th pin of the sub-MCU, and the third pin of the relay J4 is grounded.

8. The electric blanket control circuit according to claim 7, characterized in that: The function key input circuit (B4) is composed of a button SW-PB and a resistor R60 connected by lines, the second contact of the button SW-PB is grounded, the first contact of the button SWPB is connected to the second end of the resistor R60, and the first end of the resistor R60 is connected to the 5th pin of the sub-MCU.

9. The electric blanket control circuit according to claim 8, characterized in that: The display circuit (B5) is composed of a line-connected resistor R71, a resistor R72, a resistor R73, a resistor R74, a resistor R75, a resistor R76, a resistor R77 and a display SEG; the first end of the resistor R71 is connected to the 15th pin of the sub-MCU, and the second end of the resistor R71 is connected to the 1st pin of the display SEG; the first end of the resistor R72 is connected to the 16th pin of the sub-MCU, and the second end of the resistor R72 is connected to the 2nd pin of the display SEG; the 3rd pin of the display SEG is connected to the positive 3V terminal of the sub-control power supply extraction circuit; the first end of the resistor R73 is connected to the 17th pin of the sub-MCU, and the second end of the resistor R72 is connected to the 4th pin of the display SEG; The 5th pin of the display SEG is left unused; the first end of the resistor R74 is connected to the 10th pin of the display SEG, and the second end of the resistor R74 is connected to the 14th pin of the sub-MCU; the first end of the resistor R75 is connected to the 9th pin of the display SEG, and the second end of the resistor R75 is connected to the 13th pin of the sub-MCU; the 8th pin of the display SEG is connected to the positive 3V terminal of the sub-control power extraction circuit; the first end of the resistor R76 is connected to the 7th pin of the display SEG, and the second end of the resistor R76 is connected to the 12th pin of the sub-MCU; the first end of the resistor R77 is connected to the 6th pin of the display SEG, and the second end of the resistor R77 is connected to the 11th pin of the sub-MCU.

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