Wireless electric energy transmission device for electric heating clothes

Abstract

The utility model discloses a wireless electric energy transmission device for electric heating clothes, which relates to the technical field of heating and comprises an emitter and a receiver. The transmitter circuit is composed of a voltage input circuit, an input voltage detection and input current detection circuit, a full-bridge power output circuit, an input current detection amplification circuit, an MCU and peripheral circuit, an output power supply circuit, a temperature measurement circuit and a transmitting coil, and the voltage input circuit is electrically connected with the input voltage detection circuit; the input voltage detection circuit is electrically connected with the input current detection circuit, the input current detection circuit is electrically connected with the full-bridge power output circuit, and the input current detection circuit is electrically connected with the input current detection amplification circuit.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a wireless power transmission device for electric heating clothing. Background Technology

[0002] Currently, heating costs are very high in winter. If the existing system of heating the entire room were changed to heating only the human body, energy could be saved. This is especially true in the Yangtze River basin and areas south of it, where central heating is not yet widespread in winter, and people feel very cold, especially when sitting at home with little physical activity.

[0003] Traditional electric heated clothing uses batteries, which produce little heat and heat up very slowly. It takes a long time for the body to feel warm, and the power supply is not continuous, requiring frequent battery charging, making it very inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a wireless power transmission device for electric clothing heating to solve at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wireless power transmission device for electric clothing heating, comprising a transmitter and a receiver. The transmitter circuit consists of a voltage input circuit, an input voltage detection circuit, an input current detection circuit, a full-bridge power output circuit, an input current detection amplification circuit, an MCU and peripheral circuits, an output power supply circuit, a temperature measurement circuit, and a transmitting coil. The voltage input circuit is electrically connected to the input voltage detection circuit, the input voltage detection circuit is electrically connected to the input current detection circuit, the input current detection circuit is electrically connected to the full-bridge power output circuit, and the input current detection circuit is electrically connected to the input current... The current detection amplifier circuit is electrically connected; the input current detection amplifier circuit is electrically connected to the MCU and its peripheral circuits; the MCU and its peripheral circuits are electrically connected to the output power supply circuit; the output power supply circuit is electrically connected to the full-bridge power output circuit; the temperature measurement circuit is electrically connected to the MCU and its peripheral circuits; and the full-bridge power output circuit is connected to the transmitting coil. The receiver circuit consists of a receiving coil, a bridge rectifier filter circuit, connecting wires, and a USB female plug. The receiving coil and the bridge rectifier filter circuit are electrically connected; the bridge rectifier filter circuit and the connecting wires are electrically connected; and the connecting wires and the USB female plug are electrically connected.

[0006] Preferably, both the transmitting coil and the receiving coil are tubular coils.

[0007] Preferably, the transmitting coil is on the inside and the receiving coil is on the outside.

[0008] Preferably, the MCU is a Holtek HT66FW2230 / 28SSOP chip.

[0009] Preferably, the voltage input circuit is the USB female socket, and in use, the USB male plug of the charger is connected to the USB female socket of the transmitting circuit.

[0010] Preferably, the temperature measuring circuit consists of RT, R22, R18, and C6, and is used to test the temperature around the MOSFET.

[0011] The beneficial effects of this utility model are as follows: This device is mainly used for indoor heating and is used in conjunction with electric heating clothing. It is used while sitting. When using it, simply remove the power bank or battery from the electric heating clothing and connect this device. At the same time, this device can achieve a better feeling of warmth with less power consumption than whole-house heating. The heating effect is also far better than that of electric heating clothing using power banks or batteries, saving energy. In particular, it can provide a better warm experience for people in southern areas without centralized heating in winter when power consumption is low. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the device;

[0013] Figure 2 This is the voltage input circuit diagram for this device;

[0014] Figure 3 This is the input voltage detection and input current detection circuit of this device;

[0015] Figure 4 This is the full-bridge power output circuit of this device;

[0016] Figure 5 This is the MOS transistor drive circuit for this device;

[0017] Figure 6 This is the input sampling current amplifier circuit for this device;

[0018] Figure 7 This refers to the MCU and peripheral circuitry of this device.

[0019] Figure 8 This is the output power supply circuit for this device;

[0020] Figure 9 This is the temperature measurement circuit of the device;

[0021] Figure 10 This is the receiver circuit for this device. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figure 1-10The illustrated wireless power transmission device for electric clothing heating includes a transmitter and a receiver. The transmitter circuit comprises a voltage input circuit, an input voltage detection circuit, an input current detection circuit, a full-bridge power output circuit, an input current detection amplification circuit, an MCU and peripheral circuits, an output power supply circuit, a temperature measurement circuit, and a transmitting coil. The voltage input circuit is electrically connected to the input voltage detection circuit, the input voltage detection circuit is electrically connected to the input current detection circuit, the input current detection circuit is electrically connected to the full-bridge power output circuit, the input current detection circuit is electrically connected to the input current detection amplification circuit, and the input current detection amplification circuit is electrically connected to the MCU and peripheral circuits. The MCU and its peripheral circuits are electrically connected to the output power supply circuit, which is also electrically connected to the full-bridge power output circuit. The temperature measuring circuit is electrically connected to the MCU and its peripheral circuits, and the full-bridge power output circuit is connected to the transmitting coil. The receiver circuit consists of a receiving coil, a bridge rectifier and filter circuit, connecting wires, and a USB female plug. The receiving coil and the bridge rectifier and filter circuit are electrically connected, as are the connecting wires. The connecting wires are also electrically connected to the USB female plug. The AC voltage received by the receiving coil is rectified and filtered to generate DC voltage, which is then connected to a USB female plug via a wire. This USB female plug can be connected to the USB male plug of the electric heating garment. The USB plug of the electric heating garment is generally a male plug (originally used for connecting a power bank or battery). Therefore, the socket of the receiving circuit uses a female plug. To power the electric heating garment, simply remove the power bank or battery from the electric heating garment and connect the male plug of the electric heating garment to the female plug of the receiving circuit's connecting wire. The two coils are the transmitting coil of the transmitting circuit and the receiving coil of the receiving circuit, respectively. Both coils are tubular coils. The transmitting coil is on the inside, and the receiving coil is on the outside. In use, simply place the receiving coil over the outside of the transmitting coil. By properly controlling the turns ratio of the primary and secondary coils, the power supply voltage of the electric heating garment can exceed 5V, achieving higher power heating. When using, remove the power bank or battery from the electric heating garment. Connect the USB female plug of the receiver to the USB male plug in the pocket of the electric heating garment. Then, place the receiving coil of the receiver over the transmitting coil of the transmitter, and connect the USB male plug of the charger to the USB female socket of the transmitter. Because the receiver and transmitter are not tightly connected, the charger will not be pulled away even if the user leaves. When not in use, the receiver can be placed in the pocket of the electric heating garment. The voltage input circuit is the USB female socket. When in use, the USB male plug of the charger is connected to the USB female socket of the transmitting circuit.

[0024] C1 and C2 are filter capacitors used to filter out noise in the input voltage and stabilize the input voltage.

[0025] R1, R6, and C7 constitute the input voltage detection circuit. R1 and R6 divide the input voltage, and after filtering by C7, the DetectVin signal is generated and sent to pin 23 of the MCU for AD conversion to obtain the magnitude of the input voltage.

[0026] RES2 is a 0.02 ohm alloy resistor used for input current sampling. The differential signals DetectIin1 and DetectIin2 detected by RES2 are sent to the amplifier circuit for amplification. The amplifier circuit consists of U10 and its peripheral circuits. After amplification, the Isen signal is output and sent to pin 22 of the MCU. On the one hand, it performs input current overcurrent protection, and on the other hand, it obtains the magnitude of the input current through AD conversion.

[0027] The function of this circuit is to detect the input voltage in real time and implement overvoltage and undervoltage protection. It also adjusts the PWM output based on the magnitude of the input voltage and current, thereby regulating or stabilizing the overall power of the device.

[0028] U1 and U2 are SO-8 packaged MOSFET integrated circuits, each integrating two MOSFETs. U1 and U2 together have four MOSFETs, forming a full-bridge circuit. The LUG and LLG signals are sent to the gates of the two MOSFETs in U1 (pins 2 and 4 of U1), respectively, while the RUG and RLG signals are sent to the gates of the two MOSFETs in U2 (pins 2 and 4 of U2), respectively. C3, C6, C8, and C9 are output capacitors, forming a series resonant circuit with the transmitting coil. OUT1 and OUT2 are connected to the transmitting coil. C4 and C5 are filter capacitors used to stabilize the operating voltage.

[0029] The PWM00 signal output from pin 12 of the MCU is sent to pin 3 of U8. After power amplification, it forms LUG and LLG signals to control the conduction and cutoff of the two MOSFETs in U1. The PWM01 signal output from pin 11 of the MCU is sent to pin 3 of U5. After power amplification, it forms RUG and RLG signals to control the conduction and cutoff of the two MOSFETs in U2. C33 and C31 are bootstrap capacitors, which can provide a drive voltage exceeding VCC to the two upper-layer MOSFETs of the full-bridge circuit, increasing the saturation depth of the two upper-layer MOSFETs.

[0030] U10 is a high-precision operational amplifier integrated circuit. Together with R43, R44, and C37, it forms a differential amplifier circuit. The input current sampling signals DetectIin1 and DetectIin2, acquired by RES2, are sent to the differential amplifier circuit. The amplified signals are output from pin 6 of U10, filtered by R11 and C10 to form the Isen signal, which is then sent to pin 22 of the MCU. This signal serves two purposes: firstly, it provides overcurrent protection for the input current, implemented through the chip's internal OCP (overcurrent protection) circuit; secondly, the input current magnitude can be obtained through the chip's internal AD conversion.

[0031] The MCU is Holtek Semiconductor HT66FW2230 / 28SSOP.

[0032] J3 is the ICP interface, used for on-board program updates.

[0033] R30, R31, D2, and D3 form an indicator light circuit used to indicate the circuit's operating status.

[0034] KEY1, KEY2, and KEY3 are button circuits, used for powering on, increasing output power, and decreasing output power, respectively.

[0035] Y1, C38, and C39 are oscillation circuit components used together with the MCU to form an oscillation circuit, generating a 20MHz oscillation frequency signal for the MCU to operate.

[0036] C18 and C19 are power supply filter circuits.

[0037] This chip also has a reserved Qi demodulation function, which can be used to demodulate the signal fed back from the receiver.

[0038] Pins 5 and 6 of the MCU are connected to J3 for on-board program updates. Pins 9, 10, and 25 are button pins. Pins 12 and 11 output complementary PWM signals, adjusting power through frequency modulation during initial power startup and by changing the PWM duty cycle as the output circuit approaches resonance. Pins 13 and 14 are connected to the LED circuit. Pins 17 and 18 are connected to the crystal oscillator. Pin 8 is the power supply pin for the chip's digital circuit, pin 7 is the ground pin for the chip's digital circuit, pin 19 is the power supply pin for the chip's analog circuit, and pin 20 is the ground pin for the chip's analog circuit. Pin 22 is the input current sampling value (Isen) input port, and pin 23 is the input voltage sampling value (DetectVin) input port. Pin 24 is the enable output port for the power output circuit, outputting the ENABLE_POWER signal to control the output power supply circuit. Pin 26 is used for temperature measurement.

[0039] The output power supply circuit consists of Q1 and R45. Q1 is a P-channel MOSFET. When the ENABLE_POWER signal output from pin 24 of the MCU is high, Q1 is cut off, thereby disconnecting the power supply circuit of the full-bridge power output circuit and reducing standby power consumption. When the ENABLE_POWER signal output from the MCU is low, Q1 is turned on, thereby turning on the power supply circuit of the full-bridge power output circuit.

[0040] The temperature sensing circuit consists of RT, R22, R18, and C6, and is used to measure the temperature around the MOSFET. RT and R22 form a voltage divider circuit. RT is a 100K / 3950 thermistor. The voltage divider signal generated by RT and R22 is filtered by R18 and C6 to form the FODtemp signal, which is sent to pin 26 of the MCU for AD conversion. This allows the temperature near the MOSFET to be calculated, preventing damage to the MOSFET due to overheating.

[0041] The receiving circuit consists of a receiving coil, a bridge rectifier circuit, a filter circuit, connecting wires, and a USB female connector. L2 is the receiving coil. D1, D2, D3, and D4 form the bridge rectifier circuit. L1, C1, C2, C3, and C4 form the filter circuit. The rectified and filtered DC power is connected to the USB female connector via the connecting wires, which can be connected to the USB male connector inside the heating garment.

[0042] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wireless power transmission device for electric heating clothes, characterized in that: The invention comprises a transmitter and a receiver, wherein the transmitter circuit comprises a voltage input circuit, an input voltage detection circuit and an input current detection circuit, a full-bridge power output circuit, an input current detection amplifier circuit, an MCU and peripheral circuits, an output power supply circuit, a temperature measurement circuit, and a transmitting coil. The voltage input circuit is electrically connected to the input voltage detection circuit, the input voltage detection circuit is electrically connected to the input current detection circuit, the input current detection circuit is electrically connected to the full-bridge power output circuit, the input current detection circuit is electrically connected to the input current detection amplifier circuit, the input current detection amplifier circuit is electrically connected to the MCU and peripheral circuits, the MCU and peripheral circuits are electrically connected to the output power supply circuit, the output power supply circuit is electrically connected to the full-bridge power output circuit, the temperature measurement circuit is electrically connected to the MCU and peripheral circuits, and the full-bridge power output circuit is connected to the transmitting coil; the receiver circuit comprises a receiving coil, a bridge rectifier filter circuit, a connecting wire, and a USB female plug. The receiving coil is electrically connected to the bridge rectifier filter circuit, the bridge rectifier filter circuit is electrically connected to the connecting wire, and the connecting wire is electrically connected to the USB female plug.

2. A wireless power transmission device for electric heating clothing according to claim 1, characterized in that: The transmitting coil and the receiving coil are both tubular coils.

3. A wireless power transmission device for electric heating clothing according to claim 2, characterized in that: The transmitting coil is on the inner side, and the receiving coil is on the outer side.

4. A wireless power transmission device for electric heating clothing according to claim 2, characterized in that: The MCU is the Hetai chip HT66FW2230 / 28SSOP.

5. A wireless power transmission device for electric heating clothing according to claim 2, characterized in that: The voltage input circuit is a USB female socket, and when in use, the USB male plug of the charger is connected to the USB female socket of the transmitting circuit.

6. A wireless power transmission device for electric heating clothing according to claim 2, characterized in that: The temperature measuring circuit is composed of RT, R22, R18 and C6, and is used to measure the temperature around the MOS tube.

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