Wireless electric blanket control circuit, wireless electric blanket control device and wireless control electric blanket

Abstract

The utility model discloses a wireless electric blanket control circuit, a wireless electric blanket control device and a wireless control electric blanket, which are applied to a wireless transmitting end and a wireless receiving end of a wireless electric blanket. The wireless transmitting end comprises a first microcontroller unit, a wireless transmitting unit, an LCD display unit, an operation panel unit, a second microcontroller unit, an AC / DC power conversion unit, a wireless receiving unit and an LED module. Remote control and state monitoring of the electric blanket are achieved through the wireless communication technology, a user can remotely control the electric blanket through the wireless transmitting end and does not need to directly make contact with the electric blanket or a control panel of the electric blanket, convenience and comfort of the user are improved, control over the electric blanket is more flexible, and user experience is improved. The electric blanket can be controlled at any position in a room and is not limited by positions. The wireless electric blanket control circuit provided by the utility model improves the user experience, enhances the flexibility and functionality of the electric blanket, and realizes intelligent control.

Description

Technical Field

[0001] This utility model relates to a wireless heating blanket control circuit and device, and a wirelessly controlled electric heating blanket, belonging to the technical field of electric heating products. Background Technology

[0002] With the development of technology and the improvement of people's living standards, the demand for home comfort is increasing. Electric blankets, as a common heating device, are widely welcomed due to their convenience and good heating effect. However, existing electric blankets usually require manual operation, and users need to directly touch the electric blanket to adjust the temperature or turn it on or off. This lack of convenience and potential safety hazards means they no longer meet people's requirements and urgently need improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a wireless heating blanket control circuit and device, and a wirelessly controlled electric heating blanket, so as to solve the shortcomings of the existing technology.

[0004] This utility model provides the following solution:

[0005] A control circuit for a wireless heated blanket is used in the wireless transmitter and wireless receiver of a wireless heated blanket, wherein the wireless transmitter includes:

[0006] The first microcontroller unit is used to decode the received wireless signal, extract the control command, and output it.

[0007] The wireless transmitting unit is used to receive wireless signals from the wireless transmitting end and demodulate the wireless signals.

[0008] An LCD display unit is used to display the current working status of the electric blanket.

[0009] The operation panel unit is used to acquire external operation information for the wireless receiver.

[0010] The wireless receiver is installed on the electric blanket and includes:

[0011] The second microcontroller unit parses the user input information and encodes it into a wireless signal format;

[0012] AC / DC power conversion unit, connected to the second microcontroller, is used to convert AC power into power input for the second microcontroller unit;

[0013] The wireless receiving unit is connected to the second microcontroller, receives wireless signals from the wireless receiving end, and converts the wireless signals into digital signals that can be processed by the second microcontroller;

[0014] The LED module, connected to the second microcontroller, is used to indicate the working status of the wireless receiver.

[0015] Furthermore, a filter capacitor is connected between pin 1 and pin 2 of the first microcontroller unit. The first microcontroller unit is connected to the LCD display unit and the operation panel unit. The operation panel unit is a push-button switch assembly, including: a first push-button switch, a second push-button switch, a third push-button switch, a fourth push-button switch, a fifth push-button switch, and a sixth push-button switch. One end of the first push-button switch is connected to the K_A pin of the first microcontroller, and the other end is grounded. One end of the second push-button switch is connected to the K_B pin of the first microcontroller, and the other end is grounded. One end of the third push-button switch is connected to the K_TIME pin of the first microcontroller, and the other end is grounded. One end of the fourth push-button switch is connected to the SLEEP pin of the first microcontroller, and the other end is grounded. One end of the fifth push-button switch is connected to the K_CM pin of the first microcontroller, and the other end is grounded. One end of the sixth push-button switch is connected to the K_PER pin of the first microcontroller, and the other end is grounded.

[0016] Furthermore, it also includes a backlight LED, the positive terminal of which is connected to the VCC power supply, and the negative terminal of which is connected to pin 3 of the first microcontroller. A current-limiting resistor is connected in series between the backlight LED and pin 3 of the first microcontroller.

[0017] Furthermore, the wireless transmitting unit includes a wireless communication chip, an antenna and its resonant matching network. A first crystal oscillator is connected between pin 1 and pin 6 of the wireless communication chip. Pin 5 of the wireless communication chip is connected to the VCC power supply. A decoupling capacitor is connected between the VCC power supply and pin 5. Pin 4 of the wireless communication chip is the TXD pin for receiving data from the first microcontroller.

[0018] Furthermore, the second microcontroller unit is connected to the wireless input pin of the wireless receiving unit via a wireless transmitting pin, and the peripheral circuit of the wireless receiving unit includes an antenna, an inductor, a capacitor, and a second crystal oscillator.

[0019] Furthermore, the antenna is connected to the RF output pin of the RF chip in the wireless receiving unit. The inductor includes a first inductor and a second inductor. The capacitors include a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor. One end of the fourth capacitor is connected to pin 7 of the RF chip, and the other end is grounded. One end of the fifth capacitor is connected to pin 4 of the RF chip, and the other end is grounded. One end of the sixth capacitor is connected to pin 3 of the RF chip, and the other end is grounded. One end of the seventh capacitor is connected to pin 2 of the RF chip, and the other end is connected between the antenna and the second inductor. One end of the second inductor is grounded.

[0020] Furthermore, the LED module includes a first LED, a second LED, a third LED, and a fourth LED. The positive terminal of the first LED is connected to the LEDPER pin of the first microcontroller unit, and the negative terminal of the first LED is grounded. The positive terminal of the second LED is connected to the LED ON pin of the second microcontroller, and the negative terminal of the second LED is grounded. The positive terminal of the third LED is connected to the LED YXRF pin of the second microcontroller, and the negative terminal of the third LED is grounded. The positive terminal of the fourth LED is connected to the YXSW pin of the second microcontroller, and the negative terminal of the fourth LED is grounded. A current-limiting resistor is connected in series between each of the above pins and the LED.

[0021] Furthermore, the AC / DC power conversion unit includes a fuse, a rectifier bridge, and an electrolytic capacitor. The fuse is connected in series on the AC input line, and the rectifier bridge is used to convert the input AC power into DC power.

[0022] A wireless heated blanket control device, wherein the wireless heated blanket control device is provided with the aforementioned wireless heated blanket control circuit.

[0023] A wireless heating blanket includes a wireless heating blanket control device, wherein a wireless receiver in the wireless heating blanket control device is connected to a wireless transmitter via a wireless connection.

[0024] This utility model has the following advantages compared with the prior art:

[0025] This invention utilizes wireless communication technology to achieve remote control and status monitoring of an electric blanket. The wireless blanket includes a wireless transmitter and a wireless receiver, which exchange data via wireless signals to achieve intelligent control of the electric blanket. The transmitter sends user commands, while the receiver receives the commands and controls the blanket's operating status. Users can remotely control the electric blanket via the wireless transmitter, using it as a wireless remote control without direct contact with the blanket or its control panel, improving convenience and comfort. This makes the blanket control more flexible, allowing users to control it from anywhere in the room without location restrictions. The wireless receiver displays the blanket's current operating status, such as temperature and timer information, on an LCD screen, providing real-time feedback to help users better manage the blanket's use. The operation panel provides an intuitive user interface, allowing users to control the blanket with simple button operations, simplifying operation and reducing the learning curve.

[0026] In summary, the wireless heating blanket control circuit provided by this utility model improves the user experience, enhances the flexibility and functionality of the electric blanket, and achieves intelligent control. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a wireless heated blanket.

[0029] Figure 2 This is a block diagram of the wireless transmitter circuit of a wireless heated blanket.

[0030] Figure 3 This is a block diagram of the wireless receiver circuit of a wireless heated blanket.

[0031] Figure 4 This is the circuit schematic of the first microcontroller unit and the push-button switch unit.

[0032] Figure 5 This is the circuit diagram of the wireless transmitting unit.

[0033] Figure 6 This is a circuit diagram of an LCD screen.

[0034] Figure 7 This is the circuit schematic of the second microcontroller unit.

[0035] Figure 8 This is the circuit diagram of the wireless receiver unit.

[0036] Figure 9 This is the circuit diagram of an LED module.

[0037] Figure 10 This is the circuit schematic of the AC / DC power conversion unit. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the specific implementation of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] like Figure 1As shown, the product components of a wireless heating blanket include a wireless transmitter A and a wireless receiver B. In many embodiments, the wireless transmitter A can be configured as a remote control, communicating with the wireless receiver B via infrared control or radio frequency to control the wireless heating blanket. The main application scenarios for wireless heating blankets include: home use, medical care, outdoor camping or travel, office environments, smart hotels, etc. In actual use, users can control the electric heating blanket without direct contact, improving convenience. Wireless control reduces the clutter of wires, lowering the risk of tripping or wire damage. Users can flexibly adjust the temperature settings according to personal preferences and environmental conditions, enhancing the user experience and improving product comfort.

[0040] like Figure 2 and Figure 3 As shown, Figure 2 and Figure 3 The main circuit structure of the wireless heating blanket control circuit is shown, including: a first microcontroller, a wireless transmitting unit, an LCD display unit, an operation panel unit, a second microcontroller unit, an AC / DC power conversion unit, a wireless receiving unit, and an LED module. These circuit components are interconnected to form the wireless transmitting end and wireless receiving end of the wireless heating blanket. The wireless transmitting end includes:

[0041] The first microcontroller unit is used to decode the received wireless signals, extract control commands, and output them.

[0042] The wireless transmitting unit is used to receive wireless signals from the wireless transmitting end and demodulate the wireless signals.

[0043] The LCD display unit is used to display the current working status of the electric blanket.

[0044] The operation panel unit is used to obtain external operation information for the wireless receiver, which is usually user input information.

[0045] The wireless receiver is installed on the electric blanket and includes:

[0046] The second microcontroller unit parses the user input information and encodes it into a wireless signal format;

[0047] AC / DC power conversion unit, connected to the second microcontroller, is used to convert AC power into power input for the second microcontroller unit;

[0048] The wireless receiving unit is connected to the second microcontroller, receives wireless signals from the wireless receiving end, and converts the wireless signals into digital signals that can be processed by the second microcontroller;

[0049] The LED module, connected to the second microcontroller, is used to indicate the working status of the wireless receiver.

[0050] The wireless transmitter and receiver of the wireless blanket achieve remote control of the electric blanket through the aforementioned wireless communication technology. The first microcontroller unit of the wireless transmitter receives user input information from the operation panel unit, encodes the user input information into a wireless coded signal, and transmits it through the wireless transmitter unit. This user input information is typically entered through the operation panel unit. The wireless transmitter unit receives the wireless coded signal from the first microcontroller, modulates the signal, and transmits it through the antenna. It can be seen that the wireless transmitter transmits user input information wirelessly via the first microcontroller, the wireless transmitter unit, and the antenna. The operation panel unit provides an intuitive user interface, allowing users to send corresponding commands through simple button operations.

[0051] At the wireless receiver, the wireless receiving unit receives the wireless signal from the wireless transmitter, demodulates the signal, and extracts the control commands. In this process, receiving external wireless signals is handled by the wireless receiving unit. Then, the wireless receiving unit demodulates the wireless signal and sends it to the second microcontroller unit (wireless receiver). The second microcontroller unit receives the demodulated control commands from the wireless receiving unit, parses the commands, and controls the electric blanket's operating state according to the commands. It can be seen that the wireless receiver, through the wireless receiving unit and the second microcontroller, receives the wireless signal from the wireless transmitter and extracts the corresponding control commands to control the electric blanket.

[0052] The wireless receiver also includes an AC / DC power conversion unit, which converts alternating current (AC) to direct current (DC) to power the second microcontroller and other components. The LCD display unit shows the electric blanket's operating status in real time, such as temperature and timer information, for user interaction, allowing users to monitor the blanket's operation at any time. The LED module reflects the wireless receiver's operating status by turning it on and off, including power status and signal reception status.

[0053] Based on the circuit structure and principle described above, the wireless electric blanket control circuit realizes functions such as remote control and status monitoring. It has technical effects such as easy operation, improved safety, and enhanced flexibility, providing users with a more comfortable, safe, and convenient electric blanket experience.

[0054] like Figure 4As shown, a filter capacitor is connected between pin 1 and pin 2 of the first microcontroller unit. The first microcontroller unit is connected to the LCD display unit and the operation panel unit. The operation panel unit is a push-button switch assembly, including: a first push-button switch S1, a second push-button switch S2, a third push-button switch S3, a fourth push-button switch S4, a fifth push-button switch S5, and a sixth push-button switch S6. One end of the first push-button switch S1 is connected to the K_A pin of the first microcontroller, and the other end is grounded. One end of the second push-button switch S2 is connected to the K_B pin of the first microcontroller, and the other end is grounded. One end of the third push-button switch S3 is connected to the K_TIME pin of the first microcontroller, and the other end is grounded. One end of the fourth push-button switch S4 is connected to the SLEEP pin of the first microcontroller, and the other end is grounded. One end of the fifth push-button switch S5 is connected to the K_CM pin of the first microcontroller, and the other end is grounded. One end of the sixth push-button switch S6 is connected to the K_PER pin of the first microcontroller, and the other end is grounded.

[0055] Figure 4 The circuit diagram shown provides an intuitive user input interface through six push-button switches (S1-S6), facilitating various operations such as turning the electric blanket on and off, adjusting the temperature, and setting timers, thus improving the user experience. The coordinated operation between different components achieves technical effects such as wireless control, status monitoring, ease of operation, energy saving, and enhanced flexibility, providing users with a more comfortable, safe, and convenient user experience.

[0056] like Figure 5 As shown, the wireless transmitting unit IC2 includes a wireless communication chip, an antenna, and its resonant matching network. A first crystal oscillator Y1 is connected between pins 1 and 6 of the wireless communication chip IC2. Pin 5 of the wireless communication chip Y1 is connected to the VCC power supply. Decoupling capacitors (C6 and C7) are connected between the VCC power supply and pin 5. Pin 4 of the wireless communication chip is the TXD pin for receiving data from the first microcontroller IC1. It also includes a backlight LED. The positive terminal of the backlight LED is connected to the VCC power supply, and the negative terminal of the backlight LED is connected to pin 3 of the first microcontroller. A current-limiting resistor R1 is connected in series between the backlight LED and pin 3 of the first microcontroller.

[0057] Figure 5The wireless transmitter IC2 shown communicates with the first microcontroller IC1 via the wireless communication chip antenna and its resonant matching network, thereby wirelessly transmitting user commands to the wireless receiver. The integration of the wireless communication chip, antenna, and resonant matching network in the wireless transmitter IC2 optimizes signal transmission and reception, improving the efficiency and reliability of wireless communication. The first crystal oscillator Y1 provides a stable clock signal for the wireless communication chip, ensuring the accuracy of data modulation. The use of decoupling capacitors (C6 and C7) reduces power supply noise and voltage fluctuations, providing a stable power supply for the wireless communication chip and ensuring its normal operation. The wireless transmitter IC2 is powered by the VCC power supply. Data from the first microcontroller IC1 is precisely transmitted to pin 4 of the wireless communication chip via the TXD pin. The backlight LED provides an intuitive indicator, displaying the device's operating status to the user. The coordinated operation of the wireless communication chip, crystal oscillator, decoupling capacitors, backlight LED, and current-limiting resistor ensures the efficient and stable operation of the wireless transmitter unit.

[0058] Figure 6 The circuit structure of an LCD screen is shown. Figure 6 In this circuit, the COM pins (COM1-COM4) are used to connect to the common terminal of the LCD screen, controlling the common electrode of the LCD. The SEG pins (SEG1-SEG14) are used to control the different segments of the LCD to display different numbers or characters. By combining the COM and SEG pins, the LCD can be controlled to display specific information, such as temperature, time, status messages, etc. The LCD circuit integrates the COM and SEG pins into a single IC, simplifying the circuit structure and reducing the number of external components. The combination of COM and SEG pins provides precise control over the LCD display, enabling the wireless heating blanket to dynamically display various information, making it suitable for various application scenarios.

[0059] like Figure 7 As shown, Figure 7 The circuit connections of the second microcontroller IC3 and its peripheral circuits are shown. Figure 7In this configuration, the positive terminal of the VCC power supply is connected to the power supply pin of the second microcontroller IC3 to power the IC. A decoupling capacitor smooths the power supply voltage, reducing the impact of power supply noise on the second microcontroller IC3. Data and clock inputs are fed into the DAT and CLK pins of the second microcontroller IC3 to receive data and clock signals from external microcontrollers or other control units for synchronizing data transmission and controlling the operation of the second microcontroller IC3. The OUT1 and OUT2 pins of the second microcontroller IC3 can be used to output control signals, such as driving other circuits or devices. The Buz pin can be used to drive a buzzer to provide audible cues. The LED series pins (LED_PER, LED_ON, LED_YXRF, LED_YXSW) are used to control LEDs, indicating different operating states or modes by controlling the on / off state of different LEDs. The RFIN reference is used to receive wireless radio frequency signals, enabling the wireless reception function of the second microcontroller IC3. The second microcontroller IC3 can process multiple input signals and control multiple output devices. It is a multi-functional circuit control unit. By integrating functions such as data reception, status indication and sound prompts, the second microcontroller IC3 enhances the interactivity and user experience of the wireless heating blanket and has good scalability.

[0060] like Figure 8 As shown, Figure 8 The circuit connection of the wireless receiver unit is shown. The antenna is connected to the RF output pin of the RF chip IC3 in the wireless receiver unit. The inductors include: a first inductor L1 and a second inductor L2. The capacitors include a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7. One end of the fourth capacitor C4 is connected to pin 7 of the RF chip IC4, and the other end is grounded. One end of the fifth capacitor C5 is connected to pin 4 of the RF chip IC4, and the other end is grounded. One end of the sixth capacitor C6 is connected to pin 3 of the RF chip, and the other end is grounded. One end of the seventh capacitor C7 is connected to pin 2 of the first RF chip, and the other end is connected between the antenna and the second inductor L2. One end of the second inductor L2 is grounded.

[0061] The RF chip IC3 and its peripheral circuitry (including the antenna, inductors, and capacitors) enable effective reception and demodulation of wireless signals. By optimizing signal reception quality, the system's sensitivity and anti-interference capabilities are improved, thereby ensuring accurate demodulation and reliable transmission of wireless signals. The antenna ANT is connected to the RF output pin of the RF chip ICE and is responsible for receiving wireless signals from the air. A carefully designed antenna matching network (composed of inductors L1 and L2 and capacitors C4, C5, C6, and C7) effectively improves signal reception efficiency and quality. The matching network, consisting of inductors L1 and L2 and capacitors C4, C5, C6, and C7, tunes the impedance between the antenna and the RF chip, ensuring maximum system sensitivity at the operating frequency. The matching network effectively filters out unwanted frequency components, reducing the impact of interference signals on the received signal and ensuring good control of the wireless receiver and the electric blanket by the wireless transmitter. Through the coordinated work of the antenna, inductors, and capacitors, efficient transmission of RF signals from the antenna to the RF chip is ensured, enabling the wireless receiver unit to efficiently and accurately receive and demodulate wireless signals.

[0062] like Figure 9 As shown, Figure 9 The circuit structure of the LED module is shown. The LED module includes a first LED LED1, a second LED LED2, a third LED LED3, and a fourth LED LED4. The positive terminal of the first LED LED1 is connected to the LED PER pin of the second microcontroller IC3, and the negative terminal of the first LED LED1 is grounded. The positive terminal of the second LED LED LED2 is connected to the LED ON pin of the second microcontroller IC3, and the negative terminal of the second LED LED2 is grounded. The positive terminal of the third LED LED LED3 is connected to the LED YXRF pin of the second microcontroller IC3, and the negative terminal of the third LED LED is grounded. The positive terminal of the fourth LED LED is connected to the YXSW pin of the second microcontroller IC3, and the negative terminal of the fourth LED LED is grounded. A current-limiting resistor is connected in series between each of the above pins and the LEDs.

[0063] exist Figure 9In the circuit structure shown, the LED module circuit connects four independently controlled LEDs (LED1-LED4) directly to specific pins of the microcontroller IC3, and connects them in series with current-limiting resistors. This enables precise driving and protection of each LED. Each LED is independently controlled by different pins of the microcontroller (such as LED PER, LED ON, etc.), providing multi-state indications such as power, operation, communication, etc. The output signals of each pin work together to interact with the user through LED combinations, allowing the user to know the working status of the electric blanket immediately. The current-limiting resistors are connected in series in each branch to prevent overcurrent damage to the LEDs or microcontroller pins. The LED module has a modular design, allowing for flexible expansion of functions by adding or removing LEDs or adjusting the microcontroller program without modifying the overall circuit structure. The multi-pin output of the microcontroller and the coordination of the current-limiting resistors ensure the independent controllability of each LED while maintaining the stability of the overall LED module circuit through a unified grounding and resistance protection mechanism, providing a stable and efficient electric blanket status indication function.

[0064] like Figure 10 The AC / DC power conversion unit shown converts alternating current (AC) to direct current (DC), providing a stable DC power supply for the wireless receiver circuitry. Overcurrent protection is provided by a fuse and opposing diodes to prevent reflected current from damaging the circuit. A rectifier bridge converts AC to DC, and electrolytic capacitors smooth the DC voltage, reducing voltage ripple. A voltage regulator chip and filter capacitors further smooth the output voltage. The AC / DC power conversion unit also includes a SWAT thermal switch for overheat protection, disconnecting the circuit when the temperature exceeds a set value to prevent overheating damage. Through rectification, filtering, and voltage regulation, the AC / DC power conversion unit provides a stable DC power supply, suitable for powering microcontrollers and wireless receivers. The combination of the rectifier bridge and voltage regulator chip results in high power conversion efficiency and reduced energy loss. LED indicators (LED1-LED4) provide a clear view of the wireless heating blanket's operating status, ensuring efficient and safe AC-to-DC conversion to power the wireless receiver and the heating blanket.

[0065] Based on the wireless heating blanket control circuit, this utility model also provides a corresponding wireless heating blanket control device and a wireless heating blanket, as an expansion of the application scenarios of the wireless heating blanket control circuit. By setting a wireless receiver on the wireless heating blanket and communicating wirelessly with the wireless receiver through a wireless transmitter, the wireless heating blanket can be controlled, thus meeting the operational requirements of this utility model in its main application scenarios.

[0066] In the practical application scenario of this utility model, the first microcontroller in the first microcontroller unit can be a microprocessor of model STC8G1K08A, the second microcontroller in the second microcontroller unit can be a microprocessor of model STM8S003F3 or EFM8BB10F8G, the RF chip in the wireless transmitting unit can be an RF chip of model CMT2189B, the receiving chip in the wireless receiving unit can be an RF chip of model CMT2219A, and the LCD display unit can be a segment LCD driver of model HT1621B-SOP24. When selecting components, if the number of pins at the transmitting or receiving end is limited, HT66F0185 (20-pin SOP) or STC8G1K08A (16-pin SOP) can be selected, which come with built-in LCD driver and hardware SPI, saving the need for external drivers. In smart home applications, the RF chips for both the wireless receiver and transmitter can be configured with a 433MHz OOK solution, which offers the lowest cost and is suitable for simple remote control applications. Alternatively, a 2.4GHz solution can be used, offering better anti-interference capabilities and suitability for multi-channel smart home scenarios. The LCD display (panel) can be customized with 32×4 or 24×8 segments, directly matching the HT1621B or TM1628, reducing MCU GPIO usage. All components are powered by 5V or 3.3V, compatible with common AC-DC 12V→5V or 3.3V power modules.

[0067] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0068] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the corresponding claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the corresponding claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing specific embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A control circuit for a wireless heated blanket, applied to the wireless transmitter and wireless receiver of a wireless heated blanket, characterized in that, The wireless transmitter includes: The first microcontroller unit is used to decode the received wireless signal, extract the control command, and output it. The wireless transmitting unit is used to receive wireless signals from the wireless transmitting end and demodulate the wireless signals. An LCD display unit is used to display the current working status of the electric blanket. The operation panel unit is used to acquire external operation information for the wireless receiver. The wireless receiver is installed on the electric blanket and includes: The second microcontroller unit parses the user input information and encodes it into a wireless signal format; AC / DC power conversion unit, connected to the second microcontroller, is used to convert AC power into power input for the second microcontroller unit; The wireless receiving unit is connected to the second microcontroller, receives wireless signals from the wireless receiving end, and converts the wireless signals into digital signals that can be processed by the second microcontroller; The LED module, connected to the second microcontroller, is used to indicate the working status of the wireless receiver.

2. The wireless heated blanket control circuit according to claim 1, characterized in that, A filter capacitor is connected between pins 1 and 2 of the first microcontroller unit. The first microcontroller unit is connected to the LCD display unit and the operation panel unit. The operation panel unit is a push-button switch assembly, including: a first push-button switch, a second push-button switch, a third push-button switch, a fourth push-button switch, a fifth push-button switch, and a sixth push-button switch. One end of the first push-button switch is connected to the K_A pin of the first microcontroller, and the other end is grounded. One end of the second push-button switch is connected to the K_B pin of the first microcontroller, and the other end is grounded. One end of the third push-button switch is connected to the K_TIME pin of the first microcontroller, and the other end is grounded. One end of the fourth push-button switch is connected to the SLEEP pin of the first microcontroller, and the other end is grounded. One end of the fifth push-button switch is connected to the K_CM pin of the first microcontroller, and the other end is grounded. One end of the sixth push-button switch is connected to the K_PER pin of the first microcontroller, and the other end is grounded.

3. The wireless heated blanket control circuit according to claim 2, characterized in that, It also includes a backlight LED, the positive terminal of which is connected to the VCC power supply, and the negative terminal of which is connected to pin 3 of the first microcontroller. A current-limiting resistor is connected in series between the backlight LED and pin 3 of the first microcontroller.

4. The wireless heated blanket control circuit according to claim 1, characterized in that, The wireless transmitting unit includes a wireless communication chip, an antenna and its resonant matching network. A first crystal oscillator is connected between pin 1 and pin 6 of the wireless communication chip. Pin 5 of the wireless communication chip is connected to the VCC power supply. A decoupling capacitor is connected between the VCC power supply and pin 5. Pin 4 of the wireless communication chip is the TXD pin for receiving data from the first microcontroller.

5. The wireless heated blanket control circuit according to claim 1, characterized in that, The second microcontroller unit is connected to the wireless input pin of the wireless receiver unit via a wireless transmit pin. The peripheral circuit of the wireless receiver unit includes an antenna, an inductor, a capacitor, and a second crystal oscillator.

6. The wireless heated blanket control circuit according to claim 5, characterized in that, The antenna is connected to the RF output pin of the RF chip in the wireless receiving unit. The inductor includes a first inductor and a second inductor. The capacitors include a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor. One end of the fourth capacitor is connected to pin 7 of the RF chip, and the other end is grounded. One end of the fifth capacitor is connected to pin 4 of the RF chip, and the other end is grounded. One end of the sixth capacitor is connected to pin 3 of the RF chip, and the other end is grounded. One end of the seventh capacitor is connected to pin 2 of the RF chip, and the other end is connected between the antenna and the second inductor. One end of the second inductor is grounded.

7. The wireless heated blanket control circuit according to claim 1, characterized in that, The LED module includes a first LED, a second LED, a third LED, and a fourth LED. The positive terminal of the first LED is connected to the LED PER pin of the first microcontroller unit, and the negative terminal of the first LED is grounded. The positive terminal of the second LED is connected to the LED ON pin of the second microcontroller, and the negative terminal of the second LED is grounded. The positive terminal of the third LED is connected to the LED YXRF pin of the second microcontroller, and the negative terminal of the third LED is grounded. The positive terminal of the fourth LED is connected to the YXSW pin of the second microcontroller, and the negative terminal of the fourth LED is grounded. A current-limiting resistor is connected in series between each of the above pins and the LED.

8. The wireless heated blanket control circuit according to claim 1, characterized in that, The AC / DC power conversion unit includes a fuse, a rectifier bridge, and an electrolytic capacitor. The fuse is connected in series with the AC input line, and the rectifier bridge is used to convert the input AC power into DC power.

9. A wireless heated blanket control device, characterized in that, The radio blanket control device is provided with a radio blanket control circuit as described in any one of claims 1 to 8.

10. A wireless heating blanket, characterized in that, The radio-controlled blanket includes the radio-controlled blanket control device as described in claim 9, wherein the wireless receiver in the radio-controlled blanket control device is connected to the wireless transmitter via a wireless connection.

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