Electric blanket temperature control circuit

Abstract

The utility model relates to the technical field of electric blanket temperature control, and provides an electric blanket temperature control circuit which comprises a master control single chip microcomputer, the input end of the master control single chip microcomputer is electrically connected with a temperature gear relay, the first output end of the master control single chip microcomputer is electrically connected with a temperature gear display, and the second output end of the master control single chip microcomputer is sequentially connected with a temperature sensor and a heating wire. According to the utility model, the ADC or PWM single-chip microcomputer is adopted, and high-precision temperature control and adjustment are realized. The fuse, the piezoresistor and other protection elements are adopted in the circuit, and the power supply can be cut off in time when the voltage is abnormal. Multiple voltage stabilizing circuits are adopted in the circuit, stable power supply of the single-chip microcomputer and other electronic elements is guaranteed, and the influence of voltage fluctuation on temperature control precision is reduced. Combined control of the temperature gear displayer and the relay is adopted in the circuit, so that a user can visually know and adjust the working gear and temperature of the electric blanket, and operation is more convenient. The microcontroller integrates a plurality of functions of power supply voltage stabilization, main control, a clock and the like, so that the circuit design is more compact, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric blanket temperature control, and in particular to an electric blanket temperature control circuit. Background Technology

[0002] Currently, traditional electric blanket temperature control circuits mostly use simple switches or regulators for temperature control. This control method has problems such as low control accuracy, low safety, and inconvenient operation.

[0003] With the continuous development of electronic technology, microcontroller control technology has been gradually applied to the control systems of household appliances, especially in devices such as electric blankets that require precise temperature control. Existing electric blanket temperature control circuits often only have three temperature settings. Furthermore, their temperature settings often use resistor voltage division adjustment or thyristor control. These methods of temperature control are susceptible to environmental interference, and the electronic components cannot achieve precise temperature control during voltage division and thyristor control, often resulting in a certain degree of fluctuation. In addition, the number of temperature settings is relatively small, because the more settings there are, the less precise the temperature control becomes. After five settings, it is difficult for users to perceive a significant difference in temperature between adjacent settings, and real-time temperature cannot be displayed.

[0004] Microcontroller-controlled electric blanket temperature control circuits can achieve more precise temperature regulation, improve safety, and increase user convenience. However, designing a safe, reliable, and easy-to-operate electric blanket temperature control circuit remains a problem that the industry needs to solve. Utility Model Content

[0005] This invention proposes a temperature control circuit for electric blankets, which addresses the issue of microcontroller-controlled electric blanket temperature control circuits achieving more precise temperature regulation and improving safety during use.

[0006] This utility model provides a temperature control circuit for an electric blanket, including:

[0007] The main control microcontroller has its input terminal electrically connected to the temperature range relay, its first output terminal electrically connected to the temperature range display, and its second output terminal connected in sequence to the temperature sensor and the heating wire.

[0008] Preferably, the main control microcontroller is an ADC or a PWM microcontroller.

[0009] Preferably, the temperature range relay includes a first output terminal and a second output terminal, both of which are grounded.

[0010] Preferably, the main control microcontroller is embedded with a microcontroller, which is connected to the power supply voltage regulator circuit, the main controller, the clock circuit, the temperature range relay, and the input / output ports.

[0011] Preferably, the power supply voltage regulator circuit includes: an AC input terminal, a fuse, a rectifier bridge, an enable circuit, a zero-point detection circuit, and a voltage regulator circuit, wherein,

[0012] The AC input terminal includes a first AC input terminal and a second AC input terminal. The first AC input terminal is electrically connected to the voltage regulator circuit through a rectifier bridge; the second AC input terminal is grounded through a fuse.

[0013] The rectifier bridge and the voltage regulator circuit are both electrically connected to the enable circuit and the zero-point detection circuit.

[0014] Preferably, the input and output terminals of the rectifier bridge are connected in parallel with a series-connected varistor and a first capacitor, and the output terminal of the rectifier bridge is also electrically connected to the enable terminal of the microcontroller through a series-connected first diode and a first resistor.

[0015] Preferably, the zero-point detection circuit includes a second resistor and a first suppression diode connected in series; the first suppression diode is connected in parallel with a second capacitor, and the first suppression diode and the second capacitor are grounded; the second resistor and the first suppression diode are electrically connected to the zero-point detection terminal of the microcontroller through a third resistor.

[0016] Preferably, the voltage regulator circuit includes a first voltage regulator circuit, a second voltage regulator circuit, and a third voltage regulator circuit;

[0017] The first voltage regulator circuit includes a sixth resistor, a fifth resistor, a second diode, and a third capacitor connected in series. The non-series terminal of the third capacitor is electrically connected to the control terminal of the microcontroller. The positive terminal of the second diode is grounded and connected in parallel with the fourth resistor. The sixth resistor and the fifth resistor are connected to the second voltage regulator circuit through a first polarized capacitor.

[0018] The second voltage regulator circuit includes a seventh resistor, a third diode, a seventeenth resistor, an eighteenth resistor, and a fifth capacitor. One end of the seventh resistor is electrically connected to the anode of the third diode and the anode of the first polarized capacitor. The other end of the seventh resistor is electrically connected to the anode of the third diode and the third voltage regulator circuit. The cathode of the third diode is connected to the seventeenth and eighteenth resistors in series. The seventeenth and eighteenth resistors are electrically connected to the positive power supply port of the microprocessor. The eighteenth resistor is connected in parallel with the fifth capacitor.

[0019] The third voltage regulator circuit includes an eighth resistor, a fourth capacitor, a ninth resistor, a tenth resistor, and an eleventh resistor. The eighth resistor and the fourth capacitor are connected in series, and a first output port is provided between the eighth resistor and the fourth capacitor. The ninth resistor, the tenth resistor, and the eleventh resistor are connected in series, and the other end of the fourth capacitor is connected between the tenth resistor and the eleventh resistor. A temporary positive port is connected between the ninth resistor and the tenth resistor. The other end of the ninth resistor is connected to the power supply port of the main control microcontroller.

[0020] Preferably, the output terminal of the rectifier bridge is electrically connected to the controller, and the output terminal of the controller is connected to the clock circuit.

[0021] Preferably, the input terminal of the controller is connected to a fourth diode, a thirteenth resistor and a first inductor connected in series, and the first inductor is connected in parallel to a second polarity capacitor and a third polarity capacitor connected in series.

[0022] The controller's output is connected in parallel with a seventh capacitor, and is connected to the power port of the main microcontroller through a second inductor.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention employs an ADC or PWM microcontroller to achieve high-precision temperature control and regulation. Protective components such as fuses and varistors are used in the circuit to promptly cut off the power supply in case of voltage abnormalities. Multiple voltage regulator circuits are employed to ensure stable power supply to the microcontroller and other electronic components, reducing the impact of voltage fluctuations on temperature control accuracy. Furthermore, the circuit uses a combination of a temperature level display and relay control, allowing users to intuitively understand and adjust the electric blanket's operating level and temperature, making operation more convenient. The microcontroller integrates multiple functions such as power supply regulation, main control, and clock, resulting in a more compact circuit design and reduced manufacturing costs.

[0025] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0026] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a circuit diagram of a temperature control circuit for an electric blanket in an embodiment of this utility model;

[0029] Figure 2 This is a circuit diagram of the power supply and voltage regulation circuit in an embodiment of this utility model;

[0030] Figure 3 This is a circuit diagram of the controller and clock circuit in an embodiment of this utility model;

[0031] Figure 4This is a schematic diagram of the circuit connection of the microcontroller in an embodiment of this utility model;

[0032] Figure 5 This is a circuit diagram of the microcontroller in an embodiment of the present invention;

[0033] Figure 6 This is a circuit diagram of the input / output ports in an embodiment of the present invention;

[0034] Figure 7 This is a circuit diagram of the temperature range relay in an embodiment of this utility model. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] like Figure 1 As shown, this embodiment provides a temperature control circuit for an electric blanket, including:

[0037] The main control microcontroller has its input terminal electrically connected to the temperature range relay, its first output terminal electrically connected to the temperature range display, and its second output terminal connected in sequence to the temperature sensor and the heating wire.

[0038] The principle behind the above technical solution is as follows:

[0039] In a specific implementation, this utility model includes a main control microcontroller whose input terminal is electrically connected to a temperature range relay. This temperature range relay (e.g., Figure 7The device (shown) is used to set and adjust the temperature of the controlled electric blanket. Its first output terminal is electrically connected to a temperature level display, which shows the current temperature setting value of the electric blanket. Its second output terminal is connected in sequence to a temperature sensor and a heating wire. The temperature sensor detects the temperature of the controlled environment or the covered object and converts the detected temperature signal into an electrical signal that can be processed by the microcontroller. The heating wire controls its heating power according to the detected temperature signal, thereby achieving temperature control of the controlled electric blanket. The main control microcontroller can be any type of microcontroller, such as a microcontroller or digital signal processor. Its input terminal can be analog or digital. The temperature level relay uses a mechanical or electronic temperature level adjustment device, such as a digital temperature controller or an infrared temperature sensor. The first output terminal can be connected to any temperature display device, such as an LCD screen, digital tube, or touch screen, allowing the user to intuitively see the real-time status of the temperature setting value. The second output terminal can be connected sequentially to a temperature sensor and a heating wire. The temperature sensor is typically an inductive temperature sensor, such as an inductive thermometer or a thermistor. Its function is to convert the temperature of the surrounding environment or the covered object into a measurable voltage or current signal for processing by the microcontroller. The heating wire is a heating element made of any heating electronic component material, such as a resistance wire, heating coil, or ceramic heating element. Its function is to control its heating power based on the detected temperature signal to achieve the preset temperature control target. The advantage of the electric blanket temperature control circuit is that, through intelligent control by the microcontroller, precise control of the electric blanket is achieved. Furthermore, the combined use of the temperature sensor and temperature level display improves user comfort and safety, avoiding dangers caused by overheating or underheating.

[0040] The beneficial effects of the above technical solution are as follows:

[0041] This invention employs an ADC or PWM microcontroller to achieve high-precision temperature control and regulation. Protective components such as fuses and varistors are used in the circuit to promptly cut off the power supply in case of voltage abnormalities. Multiple voltage regulator circuits are employed to ensure stable power supply to the microcontroller and other electronic components, reducing the impact of voltage fluctuations on temperature control accuracy. Furthermore, the circuit uses a combination of a temperature level display and relay control, allowing users to intuitively understand and adjust the electric blanket's operating level and temperature, making operation more convenient. The microcontroller integrates multiple functions such as power supply regulation, main control, and clock, resulting in a more compact circuit design and reduced manufacturing costs.

[0042] As one embodiment of this utility model: the main control microcontroller is an ADC or PWM microcontroller.

[0043] The principle behind the above technical solution is as follows:

[0044] In practical implementation, the ADC or PWM microcontroller possesses both analog-to-digital conversion (ADC) and pulse-width modulation (PWM) functions. It can digitize the analog voltage or current signal output from the temperature sensor and convert it into a high-precision digital signal that the microcontroller can process, thereby precisely controlling the heating power of the heating wire. Simultaneously, the microcontroller can calculate the corresponding PWM waveform based on the temperature setpoint and the signal output from the temperature sensor, and then control the PWM driver to output a PWM waveform of appropriate magnitude, thus precisely controlling the heating power of the heating wire and achieving accurate temperature control.

[0045] As one embodiment of this utility model: such as Figure 7 As shown, the temperature range relay includes a first output terminal COM1 and a second output terminal COM2, both of which are grounded.

[0046] The principle behind the above technical solution is as follows:

[0047] In actual implementation, the potential difference between the first output terminal COM1 and the second output terminal COM2 is equal to 0V. Even slight temperature changes will not cause a voltage difference between the two output terminals, ensuring normal operation even with temperature variations. Furthermore, it avoids the risk of malfunction of the temperature control relay due to temperature changes in the electric blanket.

[0048] As one embodiment of this utility model: such as Figure 4 and Figure 5 As shown, the main control microcontroller has an embedded microcontroller, which is connected to the power supply voltage regulator circuit, the main controller, the clock circuit, the temperature range relay, and the input / output ports.

[0049] The principle behind the above technical solution is as follows:

[0050] The main control microcontroller and microcontroller can communicate via bus or direct connection to achieve data sharing and functional expansion. The power supply regulator circuit provides stable voltage and current output to ensure the operational stability of each component; the main controller coordinates the operation of each module to ensure the stability and reliability of the entire system; the clock circuit provides a precise time synchronization signal to ensure time consistency between modules; temperature range relays and input / output ports (such as...) Figure 6 (As shown) It directly receives temperature signals and control commands from the external environment.

[0051] As one embodiment of this utility model: such as Figure 2As shown, the power supply voltage regulator circuit includes: an AC input terminal, a fuse F, a rectifier bridge F2, an enable circuit, a zero-point detection circuit, and a voltage regulator circuit, wherein...

[0052] The AC input terminals include a first AC input terminal AC1 and a second AC input terminal AC2. The first AC input terminal AC1 is electrically connected to the voltage regulator circuit through the rectifier bridge F2; the second AC input terminal AC2 is grounded through the fuse F.

[0053] The rectifier bridge F2 and the voltage regulator circuit are both electrically connected to the enable circuit and the zero-point detection circuit.

[0054] The principle behind the above technical solution is as follows:

[0055] In practical implementation, the power supply voltage regulator circuit can effectively convert AC power into DC power and regulate its voltage to ensure the stable operation of the entire system. The first AC input terminal AC1 and the second AC input terminal AC2 are connected to the circuit in different ways, making the circuit more flexible and reliable.

[0056] In addition, the fuse F and rectifier bridge F2 are used to prevent abnormal circuit conditions and protect the safety of equipment and personnel. The enable circuit and zero-point detection circuit control the operation of the circuit, detect its operating status, promptly identify and correct problems, and ensure the safety and stability of the entire system.

[0057] As one embodiment of this utility model: such as Figure 2 As shown, the input and output terminals of the rectifier bridge F2 are connected in parallel with a series-connected varistor RV1 and a first capacitor C1. The output terminal of the rectifier bridge F2 is also electrically connected to the enable terminal of the microcontroller through a series-connected first diode D1 and a first resistor R1.

[0058] The principle behind the above technical solution is as follows:

[0059] In practical implementation, by connecting a varistor RV1 and a capacitor C1 in parallel at the input and output terminals of rectifier bridge F2, the noise and electromagnetic interference of the circuit can be reduced to a certain extent, improving the circuit's anti-interference capability. Simultaneously, by connecting the first diode D1 and the first resistor R1 in series at the output terminal of rectifier bridge F2, the response speed and accuracy of the circuit can be further improved, enhancing the performance and reliability of the entire electric blanket temperature control circuit. The enable terminal of the microcontroller is responsible for sending control signals to the entire circuit, causing it to operate according to the set program, and adjusting the circuit's operating state through corresponding control algorithms.

[0060] As one embodiment of this utility model: such as Figure 2As shown, the zero-point detection circuit includes a second resistor R2 and a first suppression diode ZD1 connected in series; the first suppression diode ZD1 is connected in parallel with a second capacitor C2, and the first suppression diode ZD1 and the second capacitor C2 are grounded; the second resistor R2 and the first suppression diode ZD1 are electrically connected to the zero-point detection terminal of the microcontroller through a third resistor R3.

[0061] The principle behind the above technical solution is as follows:

[0062] By adding a second resistor R2 and a first suppression diode ZD1 to the zero-point detection circuit, the first zero-point drift caused by changes in the surface temperature of the electric blanket can be effectively suppressed, ensuring the accuracy and stability of zero-point detection. The function of the first suppression diode ZD1 is to provide short-circuit protection for the electric blanket when the first capacitor C1 is charging, avoiding circuit misjudgment. Simultaneously, by connecting the first suppression diode ZD1 in parallel with the second capacitor C2 and grounding them, voltage fluctuations and noise caused by capacitor charging and discharging can be further reduced, improving the stability and reliability of the entire zero-point detection circuit.

[0063] The second resistor R2 and the first suppression diode ZD1 are electrically connected to the zero-point detection terminal of the microcontroller through the third resistor R3. When the electric blanket is powered on, after passing through the first capacitor C1 and the second capacitor C2, the second resistor R2 will be turned on. At this time, the capacitors are charged through the second suppression diode ZD2, causing the charge in the first capacitor C1 and the second capacitor C2 to gradually accumulate. When the charge in the capacitors accumulates to a certain level, it is transferred to the electric heating element through the third resistor R3.

[0064] As one embodiment of this utility model: such as Figure 2 As shown, the voltage regulator circuit includes a first voltage regulator circuit, a second voltage regulator circuit, and a third voltage regulator circuit;

[0065] The first voltage regulator circuit includes a sixth resistor R6, a fifth resistor R5, a second diode D2, and a third capacitor C3 connected in series. The non-series terminal of the third capacitor C3 is electrically connected to the control terminal of the microcontroller. The positive terminal of the second diode D2 is grounded and connected in parallel with the fourth resistor R4. The sixth resistor R6 and the fifth resistor R5 are connected to the second voltage regulator circuit through a first polarized capacitor CZ1.

[0066] The second voltage regulator circuit includes a seventh resistor R7, a third diode D3, a seventeenth resistor R17, an eighteenth resistor R18, and a fifth capacitor C5. One end of the seventh resistor R7 is electrically connected to the positive terminal of the third diode D3 and the positive terminal of the first polarized capacitor CZ1. The other end of the seventh resistor R7 is electrically connected to the positive terminal of the third diode D3 and the third voltage regulator circuit. The negative terminal of the third diode D3 is connected to the seventeenth resistor R17 and the eighteenth resistor R18 in series. The seventeenth resistor R17 and the eighteenth resistor R18 are electrically connected to the positive power supply port of the microprocessor. The eighteenth resistor R18 is connected in parallel with the fifth capacitor C5.

[0067] The third voltage regulator circuit includes an eighth resistor R8, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11. The eighth resistor R8 and the fourth capacitor C4 are connected in series, and a first output port is located between them. The ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11 are connected in series, with the other end of the fourth capacitor C4 connected between the tenth resistor R10 and the eleventh resistor R11. A temporary positive port is connected between the ninth resistor R9 and the tenth resistor R10. The other end of the ninth resistor R9 is connected to the power supply port of the main control microcontroller.

[0068] The principle behind the above technical solution lies in the following: The circuit structure utilizes three voltage regulator circuits to achieve a stable power supply to the electric blanket. These three circuits effectively prevent abnormal temperature fluctuations in the electric blanket, ensuring its safe and reliable operation. Secondly, this circuit structure employs a capacitor charging method. By charging and discharging the capacitor, the electric blanket can heat up slowly, avoiding sudden heating or cooling, thus improving safety and comfort. Thirdly, through the coordination of the zero-point detection circuit, the voltage regulator circuit, and the other voltage regulator circuit, precise timing control of the electric blanket is achieved, preventing overheating or underheating and ensuring safety and comfort. Finally, this circuit design considers the usage environment and user habits, offering good compatibility and expandability. Different functions and parameter settings can be achieved by adding different capacitors, resistors, and diodes.

[0069] As one embodiment of this utility model: such as Figure 4 and Figure 3 As shown, the output terminal of the rectifier bridge F2 is electrically connected to the controller U2, and the output terminal of the controller U2 is connected to the clock circuit.

[0070] The principle behind the above technical solution is as follows:

[0071] In practical implementation, the capacitor array provides a fast power conversion mechanism between the controller U2 and the rectifier bridge F2, allowing electrical energy to be directly obtained from AC power and converted into DC power to power the entire system. In the capacitor array, each capacitor has a specific capacitance value, and these capacitors are interconnected and arranged in a certain way to form a capacitor array. At the output of the rectifier bridge F2, the capacitors in the capacitor array charge and discharge according to the control signals of the rectifier bridge to provide DC power. The output of the controller U2 is connected to a clock circuit, which provides a precise time reference for the entire system. When the controller receives an external signal, it controls the operation of the capacitor array according to the precise time reference provided by the clock circuit.

[0072] As one embodiment of this utility model: such as Figure 3 As shown, the input terminal of the controller U2 is connected to a fourth diode D4, a thirteenth resistor R13 and a first inductor L1 connected in series. The first inductor L1 is connected in parallel to a second polarity capacitor CZ2 and a third polarity capacitor CZ3 connected in series.

[0073] The output of controller U2 is connected in parallel with a seventh capacitor C7, and is connected to the power port of the main control microcontroller through the second inductor L2.

[0074] The principle behind the above technical solution is as follows:

[0075] In practical implementation, this invention adds three components to the input terminal of controller U2: a fourth diode D4, a thirteenth resistor R13, and a first inductor L1. These three components are connected in series to improve the efficiency of the capacitor array, enabling faster conversion of electrical energy into direct current and thus providing a more stable power supply. Furthermore, a set of inductors, namely the first inductor L1, is added to the input terminal of controller U2. It is connected in parallel with a set of capacitors, the second polarity capacitor CZ2 and the third polarity capacitor CZ3. The addition of this inductor group makes the capacitor array more efficient because it reduces energy loss during capacitor charging. A seventh capacitor C7 is added to the output terminal of controller U2. This capacitor provides a fast feedback mechanism during controller operation, resulting in more stable temperature control.

[0076] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A temperature control circuit for an electric blanket, characterized in that, include: The main control microcontroller has its input terminal electrically connected to the temperature range relay, its first output terminal electrically connected to the temperature range display, and its second output terminal connected in sequence to the temperature sensor and the heating wire. Among them, the temperature range relay is used to set and adjust the temperature of the controlled electric blanket; The temperature setting display shows the current temperature setting of the electric blanket. Temperature sensors are used to detect the temperature of the environment or covered objects; The heating wire is used to adjust the heating power; The main control microcontroller is an ADC or PWM microcontroller; The temperature range relay includes a first output terminal and a second output terminal, both of which are grounded.

2. The electric blanket temperature control circuit as described in claim 1, characterized in that, The main control microcontroller is embedded with a microcontroller, which is connected to the power supply voltage regulator circuit, the main controller, the clock circuit, the temperature range relay, and the input / output ports.

3. The electric blanket temperature control circuit as described in claim 2, characterized in that, The power supply and voltage regulation circuit includes: an AC input terminal, a fuse (F), a rectifier bridge (F2), an enable circuit, a zero-point detection circuit, and a voltage regulation circuit, wherein... The AC input terminals include a first AC input terminal (AC1) and a second AC input terminal (AC2). The first AC input terminal (AC1) is electrically connected to the voltage regulator circuit through a rectifier bridge (F2); the second AC input terminal (AC2) is grounded through a fuse (F). The rectifier bridge (F2) and the voltage regulator circuit are both electrically connected to the enable circuit and the zero-point detection circuit.

4. The electric blanket temperature control circuit as described in claim 3, characterized in that, The input and output terminals of the rectifier bridge (F2) are connected in parallel with a series-connected varistor (RV1) and a first capacitor (C1). The output terminal of the rectifier bridge (F2) is also electrically connected to the enable terminal of the microcontroller through a series-connected first diode (D1) and first resistor (R1).

5. The electric blanket temperature control circuit as described in claim 3, characterized in that, The zero-point detection circuit includes a second resistor (R2) and a first suppression diode (ZD1) connected in series; the first suppression diode (ZD1) is connected in parallel with a second capacitor (C2), and the first suppression diode (ZD1) and the second capacitor (C2) are grounded; the second resistor (R2) and the first suppression diode (ZD1) are electrically connected to the zero-point detection terminal of the microcontroller through a third resistor (R3).

6. The electric blanket temperature control circuit as described in claim 3, characterized in that, The voltage regulator circuit includes a first voltage regulator circuit, a second voltage regulator circuit, and a third voltage regulator circuit; The first voltage regulator circuit includes a sixth resistor (R6), a fifth resistor (R5), a second diode (D2), and a third capacitor (C3) connected in series. The non-series terminal of the third capacitor (C3) is electrically connected to the control terminal of the microcontroller. The positive terminal of the second diode (D2) is grounded and connected in parallel with the fourth resistor (R4). The sixth resistor (R6) and the fifth resistor (R5) are connected to the second voltage regulator circuit through a first polarized capacitor (CZ1). The second voltage regulator circuit includes a seventh resistor (R7), a third diode (D3), a seventeenth resistor (R17), an eighteenth resistor (R18), and a fifth capacitor (C5). One end of the seventh resistor (R7) is electrically connected to the positive terminal of the third diode (D3) and the positive terminal of the first polarized capacitor (CZ1). The other end of the seventh resistor (R7) is electrically connected to the positive terminal of the third diode (D3) and the third voltage regulator circuit. The negative terminal of the third diode (D3) is connected to the seventeenth resistor (R17) and the eighteenth resistor (R18) in series. The seventeenth resistor (R17) and the eighteenth resistor (R18) are electrically connected to the positive power supply port of the microprocessor. The eighteenth resistor (R18) is connected in parallel with the fifth capacitor (C5). The third voltage regulator circuit includes an eighth resistor (R8), a fourth capacitor (C4), a ninth resistor (R9), a tenth resistor (R10), and an eleventh resistor (R11). The eighth resistor (R8) and the fourth capacitor (C4) are connected in series, with a first output port located between them. The ninth resistor (R9), the tenth resistor (R10), and the eleventh resistor (R11) are connected in series, with the other end of the fourth capacitor (C4) connected between the tenth resistor (R10) and the eleventh resistor (R11). A temporary positive port is connected between the ninth resistor (R9) and the tenth resistor (R10). The other end of the ninth resistor (R9) is connected to the power supply port of the main control microcontroller.

7. The electric blanket temperature control circuit as described in claim 3, characterized in that, The output of the rectifier bridge (F2) is electrically connected to the controller (U2), and the output of the controller (U2) is connected to the clock circuit.

8. The electric blanket temperature control circuit as described in claim 7, characterized in that, The input terminal of the controller (U2) is connected to a fourth diode (D4), a thirteenth resistor (R13) and a first inductor (L1) in series. The first inductor (L1) is connected in parallel to a second polarity capacitor (CZ2) and a third polarity capacitor (CZ3) in series. The output of the controller (U2) is connected in parallel with a seventh capacitor (C7), and is connected to the power port of the main control microcontroller through a second inductor (L2).

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