Photovoltaic direct-drive heat pump heat storage power distribution device

Abstract

The application discloses a photovoltaic direct-drive heat pump heat storage power distribution device, which comprises a control module, a photovoltaic monocrystalline silicon assembly, a battery pack, a heat pump module and an electric heating module. A power distribution circuit in the control module preferentially supplies photovoltaic electric energy to the heat pump module, and switches to the electric heating module when power is insufficient or outdoor temperature is lower than -5 DEG C, and excess electric energy is stored in the battery pack. The device couples the photovoltaic direct-drive heat pump and the electric heating, realizes cross-season heat storage and heat exchange hole cold and heat balance, and improves solar energy resource utilization.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic energy storage control technology, and in particular to a photovoltaic direct-drive heat pump thermal power distribution device. Background Technology

[0002] The photovoltaic direct-drive heat pump cross-seasonal thermal storage system is a core device for solving the thermal imbalance of underground heat exchange holes in ground source heat pumps and improving the utilization rate of clean energy. Its power distribution performance directly determines the system's energy storage efficiency, heating stability and equipment lifespan.

[0003] Existing photovoltaic heat pump thermal storage power allocation technology cannot dynamically match the energy storage and heating load conditions according to the real-time output power of photovoltaics and the ambient temperature, resulting in low comprehensive energy utilization rate.

[0004] Therefore, there is an urgent need for a photovoltaic direct-drive heat pump thermal storage power distribution device. Summary of the Invention

[0005] The purpose of this invention is to provide a photovoltaic direct-drive heat pump thermal storage power distribution device, which solves the problem that existing photovoltaic direct-drive heat pump thermal storage power distribution devices cannot dynamically match the load by combining photovoltaic power and temperature parameters, resulting in low energy utilization.

[0006] This invention provides a photovoltaic direct-drive heat pump thermal energy storage power distribution device, employing the following technology: A photovoltaic direct-drive heat pump thermal energy storage power distribution device includes: The control module (3) is equipped with a data acquisition circuit, a controller and a power distribution circuit. The control module (3) has a photovoltaic input terminal, a first power output terminal, a second power output terminal and an energy storage interface. A photovoltaic monocrystalline silicon module (1) is electrically connected to the photovoltaic input terminal of the control module (3); The battery pack (4) is electrically connected to the energy storage interface of the control module (3); The heat pump module is electrically connected to the first power output terminal of the control module (3); The electric heating module is electrically connected to the second power output terminal of the control module (3); The acquisition circuit is used to acquire the output voltage, output current and ambient temperature of the photovoltaic monocrystalline silicon module (1), and output a first voltage signal, a second voltage signal and a temperature signal; The controller is used to calculate the input power of the photovoltaic input terminal based on the first voltage signal and the second voltage signal, and compare the input power of the photovoltaic input terminal with a preset power threshold and compare the temperature signal with a preset temperature threshold. The power distribution circuit is configured to: preferentially output electrical energy from the photovoltaic input terminal through the first power output terminal to supply the heat pump module; when the input power at the photovoltaic input terminal is lower than a preset power threshold or the temperature represented by the temperature signal is lower than a preset temperature threshold, switch the electrical energy to the second power output terminal to supply the electric heating module, and store excess electrical energy in the battery pack (4) through the energy storage interface.

[0007] Optionally, the power distribution circuit includes a first power distribution unit, a second power distribution unit, and a third power distribution unit. The first power distribution unit includes a first MOSFET, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first transistor, and a first diode. The source of the first MOSFET is connected to the first terminal of the thirteenth resistor and the bus voltage of the photovoltaic input terminal. The drain of the first MOSFET is connected to the cathode of the first diode and the first power output terminal. The anode of the first diode is grounded. The gate of the first MOSFET is connected to the first terminal of the twelfth resistor and the second terminal of the thirteenth resistor. The second terminal of the twelfth resistor is connected to the collector of the first transistor. The emitter of the first transistor is grounded. The base of the first transistor is connected to the first terminal of the tenth resistor and the first terminal of the eleventh resistor. The second terminal of the eleventh resistor is grounded. The second terminal of the tenth resistor is connected to the first input terminal of the power distribution circuit.

[0008] Optionally, the second power distribution unit includes a second MOSFET, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a second transistor, and a second diode. The source of the second MOSFET is connected to the first terminal of the seventeenth resistor and the bus voltage of the photovoltaic input terminal. The drain of the second MOSFET is connected to the cathode of the second diode and the second power output terminal. The anode of the second diode is grounded. The gate of the second MOSFET is connected to the first terminal of the sixteenth resistor and the second terminal of the seventeenth resistor. The second terminal of the sixteenth resistor is connected to the collector of the second transistor. The emitter of the second transistor is grounded. The base of the second transistor is connected to the first terminal of the fourteenth resistor and the first terminal of the fifteenth resistor. The second terminal of the fifteenth resistor is grounded. The second terminal of the fourteenth resistor is connected to the second input terminal of the power distribution circuit.

[0009] Optionally, the third power distribution unit includes a protection component and a charging component. The protection component includes a third MOSFET, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a third diode, a fourth diode, a fifth diode, a sixth diode, a tenth capacitor, an eleventh capacitor, and a voltage detection chip. The source of the third MOSFET is connected to the first terminal of the twentieth resistor, the anode of the third diode, and the bus voltage of the photovoltaic input terminal. The gate of the third MOSFET is connected to the second terminal of the twentieth resistor, the first terminal of the nineteenth resistor, and the first terminal of the eighteenth resistor. The second terminal of the eighteenth resistor is connected to the power distribution unit. The third input terminal of the circuit is connected as follows: the cathode of the third diode is connected to the cathode of the fourth diode, the positive terminal of the tenth capacitor, and the VDD power supply; the second terminal of the tenth capacitor is grounded; the anode of the fourth diode is connected to the positive terminal of the eleventh capacitor and the cathode of the fifth diode; the negative terminal of the eleventh capacitor is grounded; the drain of the third MOSFET is connected to the anode of the fifth diode, the power supply terminal VDD of the voltage detection chip, and the output terminal of the protection component; the ground terminal GND of the voltage detection chip is grounded; and the output terminal of the voltage detection chip is grounded through the second terminal of the sixth diode and the nineteenth resistor.

[0010] Optionally, the charging component includes a lithium battery management chip, a 21st resistor, a 22nd resistor, a 23rd resistor, a 24th resistor, a 12th capacitor, a 13th capacitor, a 14th capacitor, a 15th capacitor, a fourth MOSFET, a first light-emitting diode (LED), a second light-emitting diode (LED), a first Zener diode, a second Zener diode, a first inductor, and a battery pack. The charging terminal of the lithium battery management chip is connected to the first terminal of the 22nd resistor, the first terminal of the 13th capacitor, the first terminal of the 12th capacitor, the first terminal of the 24th resistor, the source of the fourth MOSFET, and the output terminal of the protection component. The second terminal of the 12th capacitor is grounded. The regulated output terminal of the lithium battery management chip is connected to the second terminal of the 13th capacitor. The charging status indicator terminal of the lithium battery management chip is connected to the cathode of the second LED. The charging completion indicator terminal of the lithium battery management chip is connected to the cathode of the first LED. The anode of the first LED is connected to the anode of the second LED and the first inductor of the 22nd resistor. The lithium battery management chip's photovoltaic maximum power tracking sampling terminal is connected to the second terminal of the 24th resistor and the first terminal of the 21st resistor. The ground terminal of the lithium battery management chip, the second terminal of the 21st resistor, and the second terminal of the 14th capacitor are all grounded. The loop compensation terminal COM of the lithium battery management chip is connected to the second terminal of the 14th capacitor through the 24th resistor. The negative terminal of the lithium battery management chip's charging current sampling is connected to the first terminal of the 23rd resistor, the first terminal of the 15th capacitor, and the positive terminal of the battery pack. The negative terminal of the battery pack is grounded. The positive terminal of the lithium battery management chip's charging current sampling is connected to the second terminal of the 23rd resistor and the first terminal of the first inductor. The second terminal of the first inductor is connected to the cathode of the first Zener diode and the cathode of the second Zener diode. The anode of the first Zener diode is grounded. The drive output terminal of the lithium battery management chip is connected to the gate of the fourth MOSFET. The drain of the fourth MOSFET is connected to the anode of the second Zener diode.

[0011] Optionally, the heat pump module includes a DC compressor (11), a DC fan (12), an evaporative heat exchanger (13), an air outlet (14), an air inlet (15), a compressor closed loop (16), a pump unit (22), and a heat pump unit (26).

[0012] Optionally, the electric heating module includes a heat exchange and energy storage device (17), an electric heating device circuit (18), an insulation layer (19), a closed pipeline (20), a heat exchange hole array (21), a pump group (22), and a PEU-type heat exchange tube (25).

[0013] Optionally, the heat exchange energy storage device (17) includes an electric heating device (6), a heat exchange hole array inlet (8), a condensing heat exchanger (9), and a heat exchange hole array outlet (10).

[0014] Optionally, the heat exchange energy storage device (17) is connected to the heat exchange hole array (21) through the heat exchange hole array inlet (8), the heat exchange hole array outlet (10), the closed pipe (20) to form a heat storage medium circulation channel.

[0015] Optionally, the heat exchange and energy storage device (17) is provided with an exhaust device (23) and a drain outlet (24).

[0016] The photovoltaic direct-drive heat pump thermal energy storage power distribution device proposed in this invention collects photovoltaic operating parameters and ambient temperature parameters in real time, and dynamically matches the working mode according to the surplus of photovoltaic output and ambient temperature conditions, so as to realize the precise allocation of photovoltaic power on demand and improve the utilization rate of solar energy resources. Attached Figure Description

[0017] Figure 1 A flowchart illustrating the operation of a photovoltaic direct-drive heat pump thermal storage power distribution device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a photovoltaic direct-drive heat pump thermal storage power distribution device according to an embodiment of the present invention; Figure 3 This is a circuit diagram of a control module for a photovoltaic direct-drive heat pump thermal storage power distribution device according to an embodiment of the present invention; Figure 4 This is a circuit diagram of a power distribution circuit for a photovoltaic direct-drive heat pump thermal storage power distribution device according to an embodiment of the present invention.

[0018] Icons: 1 - Photovoltaic monocrystalline silicon module; 2 - DC power generation line; 3 - Control module; 4 - Battery pack; 5 - Heat pump direct drive line; 6 - Electric heating device; 7 - Electric heating direct drive line; 8 - Inlet of reverse heat exchanger array; 9 - Condensing heat exchanger; 10 - Outlet of heat exchanger array; 11 - DC compressor; 12 - DC fan; 13 - Evaporator heat exchanger; 14 - Air outlet; 15 - Air inlet; 16 - Compressor closed loop; 17 - Heat exchange energy storage device; 18 - Electric heating device loop; 19 - Insulation layer; 20 - Closed pipeline; 21 - Heat exchanger array; 22 - Pump group; 23 - Exhaust device; 24 - Drain outlet; 25 - PEU type heat exchange tube; 26 - Heat pump unit.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are for illustrative purposes only and are not intended to limit the invention.

[0021] The main solution of this invention is: a photovoltaic direct-drive heat pump thermal storage power distribution device, comprising: The control module contains a data acquisition circuit, a controller, and a power distribution circuit. The control module has a photovoltaic input terminal, a first power output terminal, a second power output terminal, and an energy storage interface. The photovoltaic monocrystalline silicon module is electrically connected to the photovoltaic input terminal of the control module; The battery pack is electrically connected to the energy storage interface of the control module; The heat pump module is electrically connected to the first power output terminal of the control module; The electric heating module is electrically connected to the second power output terminal of the control module; The acquisition circuit is used to acquire the output voltage, output current and ambient temperature of the photovoltaic monocrystalline silicon module, and output a first voltage signal, a second voltage signal and a temperature signal; The controller is used to calculate the input power of the photovoltaic input terminal based on the first voltage signal and the second voltage signal, and compare the input power of the photovoltaic input terminal with a preset power threshold, and compare the temperature signal with a preset temperature threshold. The power distribution circuit is configured to: prioritize the output of electrical energy from the photovoltaic input terminal through the first power output terminal to supply the heat pump module; when the input power at the photovoltaic input terminal is lower than a preset power threshold, or when the temperature represented by the temperature signal is lower than a preset temperature threshold, switch the electrical energy to the second power output terminal to supply the electric heating module, and store the excess electrical energy in the battery pack through the energy storage interface.

[0022] Because existing photovoltaic heat pump thermal storage power allocation methods cannot dynamically adapt to operating conditions, resulting in low energy utilization, this invention provides a photovoltaic direct-drive heat pump thermal storage power allocation device. By combining multi-parameter sampling and detection with power and temperature dual threshold discrimination, it dynamically switches the power supply priority of the heat pump module, electric heating module and battery energy storage, realizing precise on-demand allocation of photovoltaic power, improving system operation reliability and comprehensive energy utilization.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can understand it.

[0024] This embodiment provides a photovoltaic direct-drive heat pump inter-seasonal thermal storage system, such as... Figure 1 and Figure 2As shown, it includes a photovoltaic monocrystalline silicon module, a DC power generation line, a control module, a battery pack, a heat pump direct drive line, an electric heating direct drive line, a heat pump module, and an electric heating module.

[0025] The photovoltaic monocrystalline silicon module is used to receive solar radiation and directly convert it into direct current (DC). The DC power generation line is used to transmit DC power. The control module includes a data acquisition circuit, a controller, and a power distribution circuit. The data acquisition circuit can collect the output voltage, output current, and ambient temperature of the photovoltaic monocrystalline silicon module in real time and output a first voltage signal, a second voltage signal, and a temperature signal. The power distribution circuit prioritizes the output of electrical energy from the photovoltaic input terminal through the first power output terminal to supply the heat pump module. When the input power at the photovoltaic input terminal is lower than a preset power threshold, or when the temperature represented by the temperature signal is lower than a preset temperature threshold, the electrical energy is switched to the second power output terminal to supply the electric heating module. Excess electrical energy is stored in the battery pack through the energy storage interface. The heat pump direct drive line transmits DC power to drive the heat pump module. The electric heating direct drive line transmits DC power to drive the electric heating module.

[0026] In one specific embodiment, reference is made to Figure 3 The data acquisition circuit includes a voltage acquisition unit, a current acquisition unit, and a temperature acquisition unit. The voltage acquisition unit includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, and a voltage sensor J1. The non-inverting input of the first operational amplifier U1 is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2. The second terminal of the first resistor R1 is grounded. The second terminal of the second resistor R2 is connected to the output terminal of the voltage sensor J1. The ground terminal of the voltage sensor J1 is grounded. The inverting input of the first operational amplifier U1 is connected to the first terminal of the third resistor R3 and the first terminal of the first capacitor C1. The output terminal of the first operational amplifier U1 is connected to the second terminal of the third resistor R3, the second terminal of the first capacitor C1, the first terminal of the second capacitor C2, and the first output terminal NET1 of the acquisition circuit. The second terminal of the second capacitor C2 is grounded.

[0027] In the specific operation process, the voltage at the photovoltaic input terminal is acquired by the voltage sensor J1 and converted into a voltage signal output proportional to the photovoltaic input terminal voltage. The voltage signal output by the voltage sensor J1 is sent to the non-inverting input terminal of the first operational amplifier U1 through the second resistor R2. The first resistor R1 and the second resistor R2 form a voltage divider input network, which attenuates the voltage signal output by the voltage sensor J1 to the range of the ADC, and at the same time reduces the measurement error caused by input impedance mismatch. The inverting input terminal of the first operational amplifier U1 is directly connected to the output terminal to form a unity-gain voltage follower. The virtual short characteristic of the operational amplifier makes the voltage at the output terminal of the first operational amplifier U1 follow the voltage at its non-inverting input terminal, thus completing impedance transformation and signal isolation. The third resistor R3 and the first capacitor C1 are connected in parallel to form a loop phase compensation network to cancel the phase shift caused by the lead inductance of the voltage sensor J1, ensure the loop phase margin, and prevent the operational amplifier from high-frequency self-oscillation. The voltage signal after voltage division and buffering is output from the output terminal of the first operational amplifier U1; the second capacitor C2 performs a first-order passive low-pass filter on the voltage signal after voltage division and buffering to filter out high-frequency ripple and residual noise, and finally outputs the first voltage signal at the first output terminal NET1 of the acquisition circuit.

[0028] The voltage sensor J1 is a Hall voltage sensor LV25-P, and the first operational amplifier U1 is an operational amplifier OPA2277.

[0029] In one specific embodiment, the current acquisition unit includes a second operational amplifier U2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third capacitor C3, a fourth capacitor C4, and a current sensor J2. The non-inverting input of the second operational amplifier U2 is connected to the first terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5. The second terminal of the fourth resistor R4 is grounded. The second terminal of the fifth resistor R5 is connected to the output terminal of the current sensor J2. The ground terminal of the current sensor J2 is grounded. The inverting input of the second operational amplifier U2 is connected to the first terminal of the sixth resistor R6 and the first terminal of the third capacitor C3. The output terminal of the second operational amplifier U2 is connected to the second terminal of the sixth resistor R6, the second terminal of the third capacitor C3, the first terminal of the fourth capacitor C4, and the second output terminal NET2 of the acquisition circuit. The second terminal of the fourth capacitor C4 is grounded.

[0030] In the specific operation process, the current at the photovoltaic input terminal is sensed by the Hall element of the Hall current sensor J2 and converted into a voltage signal output proportional to the current at the photovoltaic input terminal. The voltage signal output by the Hall current sensor J2 is sent to the non-inverting input terminal of the second operational amplifier U2 through the fifth resistor R5. The fourth resistor R4 and the fifth resistor R5 form a voltage divider input network to attenuate the voltage signal output by the Hall current sensor J2 to the range of the ADC, while reducing the measurement error caused by input impedance mismatch. The inverting input terminal of the second operational amplifier U2 is directly connected to the output terminal to form a unity-gain voltage follower. The virtual short characteristic of the operational amplifier makes the voltage at the output terminal of the second operational amplifier U2 follow the voltage at its non-inverting input terminal, completing impedance transformation and signal isolation. The sixth resistor R6 and the third capacitor C3 are connected in parallel to form a loop phase compensation network. The parallel impedance of the sixth resistor R6 and the third capacitor C3 changes the noise gain curve of the operational amplifier in the high-frequency band, canceling the phase shift caused by the lead inductance of the Hall current sensor J2, ensuring the loop phase margin, and preventing the operational amplifier from high-frequency self-oscillation. The voltage signal after voltage division and buffering is output from the output terminal of the second operational amplifier U2; the fourth capacitor C4 performs a first-order passive low-pass filter on the voltage signal after voltage division and buffering to filter out high-frequency ripple and residual noise, and finally outputs the second voltage signal at the second output terminal NET2 of the acquisition circuit.

[0031] The current sensor J2 is a Hall current sensor ACS712ELCTR-20A with a range of ±20A, a sensitivity of 100mV / A, a zero current output of 2.5V, and a supply voltage of 5V; the second operational amplifier U2 is an operational amplifier OPA2277 with unity gain stability.

[0032] In one specific embodiment, the temperature acquisition unit includes a third operational amplifier U3, a seventh resistor R7, an eighth resistor R8, a fifth capacitor C5, a sixth capacitor C6, and a temperature sensor J3. The non-inverting input of the third operational amplifier U3 is connected to the output of the temperature sensor J3 through the seventh resistor R7. The ground terminal of the temperature sensor J3 is grounded. The inverting input of the third operational amplifier U3 is connected to the first terminal of the eighth resistor R8 and the first terminal of the fifth capacitor C5. The output of the third operational amplifier U3 is connected to the second terminal of the eighth resistor R8, the second terminal of the fifth capacitor C5, the first terminal of the sixth capacitor C6, and the third ADC analog input terminal PA3 of the controller. The second terminal of the sixth capacitor C6 is grounded.

[0033] In the specific operation process, the ambient temperature is sensed by the thermistor of temperature sensor J3 and converted into a voltage signal proportional to the temperature. The voltage signal output by temperature sensor J3 is directly fed to the non-inverting input of the third operational amplifier U3 through the seventh resistor R7. The inverting input of the third operational amplifier U3 is directly connected to the output, forming a unity-gain voltage follower. Utilizing the virtual short characteristic of the operational amplifier, the voltage at the output of the third operational amplifier U3 follows the voltage at its non-inverting input, completing impedance transformation and signal isolation. The eighth resistor R8 and the fifth capacitor C5 are connected in parallel to form a loop phase compensation network. The parallel impedance of the eighth resistor R8 and the fifth capacitor C5 changes the noise gain curve of the operational amplifier in the high-frequency range, offsetting the phase shift caused by the distributed inductance of the long-distance leads of the temperature sensor, ensuring the loop phase margin, and preventing high-frequency self-oscillation of the operational amplifier. The buffered voltage signal is output from the output of the third operational amplifier U3. The sixth capacitor C6 performs a first-order passive low-pass filter on the buffered voltage signal to filter out high-frequency ripple and environmental electromagnetic interference, and finally outputs the temperature signal at the third output terminal NET3 of the acquisition circuit.

[0034] In one specific embodiment, the first ADC analog input terminal PA1 of the controller U4 is connected to the first output terminal NET1 of the acquisition circuit; the second ADC analog input terminal PA2 of the controller U4 is connected to the second output terminal NET2 of the acquisition circuit; the third ADC analog input terminal PA3 of the controller U4 is connected to the second output terminal NET3 of the acquisition circuit; the reset terminal PG10-NRST of the controller U4 is connected to the first terminal of the ninth resistor R9 and the first terminal of the seventh capacitor C7; the second terminal of the ninth resistor R9 is connected to a +3.3V power supply; the second terminal of the seventh capacitor C7 is grounded; and the controller U4 has a high-speed external crystal oscillator input. Terminal PF0-OSC_IN connects the first terminal of crystal oscillator X1 and the first terminal of eighth capacitor C8. The second terminal of eighth capacitor C8 is grounded. Terminal PF1-OSC_OUT of high-speed external crystal oscillator of controller U4 connects the second terminal of crystal oscillator X1 and the first terminal of ninth capacitor C9. The second terminal of ninth capacitor C9 is grounded. Terminal PB1 of controller U4 connects to the first input terminal NET4 of power distribution circuit. Terminal PB2 of controller U4 connects to the second input terminal NET5 of power distribution circuit. Terminal PB3 of controller U4 connects to the third input terminal NET6 of power distribution circuit.

[0035] In the specific operation, the +3.3V power supply charges the seventh capacitor C7 through the ninth resistor R9. The ninth resistor R9 and the seventh capacitor C7 form an RC reset delay network. The ninth resistor R9 provides a pull-up level for the reset pin, and the seventh capacitor C7 implements a power-on delay, ensuring that the reset pin remains at a low level for a sufficient duration at the moment of power-on, so that the controller can reliably complete the reset initialization. The crystal oscillator X1, the eighth capacitor C8, and the ninth capacitor C9 form a Pierce oscillation circuit. The crystal oscillator X1 generates an 8MHz high-precision sine wave signal. The eighth capacitor C8 and the ninth capacitor C9 act as the crystal oscillator load capacitors, adjusting the phase and gain of the oscillation circuit to ensure stable crystal oscillation and accurate frequency, providing a high-speed external clock source for the controller.

[0036] After the controller U4 is powered on and reset, the internal clock system phase-locked loop multiplies the 8MHz external crystal oscillator signal to the system operating frequency. The ADC module uses this clock as a reference for frequency division configuration. The controller configures the ADC to continuous scanning mode and sequentially enables the three analog input channels PA1, PA2, and PA3. The first voltage signal output by the voltage acquisition unit is sent to the first ADC analog input terminal PA1 of the controller U4 via the first output terminal NET1 of the acquisition circuit. The second voltage signal output by the current acquisition unit is sent to the second ADC analog input terminal PA2 of the controller U4 via the second output terminal NET2 of the acquisition circuit. The temperature signal output by the temperature acquisition unit is sent to the third ADC analog input terminal PA3 of the controller U4 via the third output terminal NET3 of the acquisition circuit. The ADC module performs successive approximation conversion on the analog voltage of the three channels according to the preset scanning order, converting the analog voltage into a 12-bit digital value, and storing the conversion result in the data register of the corresponding channel.

[0037] The controller U4 calculates the input power of the photovoltaic input terminal based on the collected voltage and current data and compares it with a preset power threshold in real time; it also compares the temperature data with a preset temperature threshold in real time; based on the comparison results, it outputs a first control signal to the first input terminal NET4 of the power distribution circuit through the first control terminal PB1. When the input power of the photovoltaic input terminal is greater than the preset power threshold and the temperature represented by the temperature signal is greater than the preset temperature threshold, the first control signal is high; when the input power of the photovoltaic input terminal is lower than the preset power threshold, or the temperature represented by the temperature signal is lower than the preset temperature threshold, the first control signal is low.

[0038] Based on the comparison results, a second control signal is output from the second control terminal PB2 to the second input terminal NET5 of the power distribution circuit. When the input power of the photovoltaic input terminal is greater than the preset power threshold and the temperature represented by the temperature signal is greater than the preset temperature threshold, the second control signal is at a low level; when the input power of the photovoltaic input terminal is lower than the preset power threshold, or the temperature represented by the temperature signal is lower than the preset temperature threshold, the second control signal is at a high level.

[0039] Based on the comparison results, a third control signal is output from the third control terminal PB3 to the third input terminal NET6 of the power distribution circuit. When the heat pump module and the electric heating module are in a shutdown state or when the power is sufficient, the third control signal is at a low level; when the heat pump module or the electric heating module is in a working state, the controller switches the third input terminal NET6 of the power distribution circuit from push-pull output to high-impedance input mode.

[0040] The controller U4 uses an STM32G431CBT6 with an ARM Cortex-M4 core and a maximum clock frequency of 170MHz. It has a built-in 12-bit successive approximation ADC with a maximum sampling rate of 4Msps and supports multi-channel scan conversion mode. The crystal X1 is a high-speed external crystal with a frequency of 8MHz, providing a high-precision system clock reference for the controller.

[0041] The power distribution circuit includes a first power distribution unit, a second power distribution unit, and a third power distribution unit.

[0042] In one specific embodiment, reference is made to Figure 4 The first power distribution unit includes a first MOSFET Q1, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a first transistor T1, and a first diode D1. The source of the first MOSFET Q1 is connected to the first terminal of the thirteenth resistor R13 and the bus voltage BUS+ of the photovoltaic input terminal. The drain of the first MOSFET Q1 is connected to the cathode of the first diode D1 and the first power output terminal NET7. The anode of the first diode D1 is grounded. The gate of the first MOSFET Q1 is connected to the first terminal of the twelfth resistor R12 and the second terminal of the thirteenth resistor R13. The second terminal of the twelfth resistor R12 is connected to the collector of the first transistor T1. The emitter of the first transistor T1 is grounded. The base of the first transistor T1 is connected to the first terminal of the tenth resistor R10 and the first terminal of the eleventh resistor R11. The second terminal of the eleventh resistor R11 is grounded. The second terminal of the tenth resistor R10 is connected to the first input terminal NET4 of the power distribution circuit.

[0043] In the specific implementation process, the first input terminal NET4 of the power distribution circuit receives the first control signal output by the controller. This signal is sent to the base of the first transistor T1 after being current-limited by the tenth resistor R10. The eleventh resistor R11 is connected in parallel between the base and emitter of the first transistor T1 to provide a pull-down bias for the base of the first transistor T1.

[0044] When the first control signal is high, the first transistor T1 is saturated and turned on, and the collector voltage of the first transistor T1 is pulled low. The twelfth resistor R12 is connected in series between the collector of the first transistor T1 and the gate of the first MOSFET Q1, limiting the gate charging and discharging current and suppressing switching oscillation. The gate of the first MOSFET Q1 is pulled low through the twelfth resistor R12 and the turned-on first transistor T1. The source of the first MOSFET Q1 is connected to the bus voltage BUS+ of the photovoltaic input terminal. The gate voltage is lower than the source voltage, and the first MOSFET Q1 is turned on. During the conduction period of the first MOSFET Q1, the bus voltage BUS+ of the photovoltaic input terminal is output to the first power output terminal NET7 through the first MOSFET Q1. The first power output terminal NET7 is connected to the positive power supply terminal of the heat pump module, and the heat pump module is powered on and operates.

[0045] When the first control signal is low, the first transistor T1 is turned off. The thirteenth resistor R13 is connected across the gate of the first MOSFET Q1 and the bus voltage BUS+ of the photovoltaic input terminal, pulling the gate potential of the first MOSFET Q1 up to the bus voltage BUS+, turning off the first MOSFET Q1. The first diode D1 is connected in reverse parallel between the first power output terminal NET7 and ground, providing a discharge path for the freewheeling current of the inductive load inside the heat pump module at the moment the first MOSFET Q1 is turned off, suppressing the turn-off voltage spike of the drain of the first MOSFET Q1, and preventing the first MOSFET Q1 from being damaged by overvoltage breakdown.

[0046] In one specific embodiment, reference is made to Figure 4 The second power distribution unit includes a second MOSFET Q2, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a second transistor T2, and a second diode D2. The source of the second MOSFET Q2 is connected to the first terminal of the seventeenth resistor R17 and the bus voltage BUS+ of the photovoltaic input terminal. The drain of the second MOSFET Q2 is connected to the cathode of the second diode D2 and the second power output terminal NET8. The anode of the second diode D2 is grounded. The gate of the second MOSFET Q2 is connected to the first terminal of the sixteenth resistor R16 and the second terminal of the seventeenth resistor R17. The second terminal of the sixteenth resistor R16 is connected to the collector of the second transistor T2. The emitter of the second transistor T2 is grounded. The base of the second transistor T2 is connected to the first terminal of the fourteenth resistor R14 and the first terminal of the fifteenth resistor R15. The second terminal of the fifteenth resistor R15 is grounded. The second terminal of the fourteenth resistor R14 is connected to the second input terminal NET5 of the power distribution circuit.

[0047] In the specific implementation process, the second input terminal NET5 of the power distribution circuit receives the second control signal output by the controller. This signal is sent to the base of the second transistor T2 after being current-limited by the fourteenth resistor R14. The fifteenth resistor R15 is connected in parallel between the base and emitter of the second transistor T2 to provide a pull-down bias for the base of the second transistor T2.

[0048] When the second control signal is high, the second transistor T2 is saturated and turned on, and the collector voltage of the second transistor T2 is pulled low. The sixteenth resistor R16 is connected in series between the collector of the second transistor T2 and the gate of the second MOSFET Q2, limiting the gate charging and discharging current and suppressing switching oscillation. The gate of the second MOSFET Q2 is pulled low through the sixteenth resistor R16 and the turned-on second transistor T2. The source of the second MOSFET Q2 is connected to the bus voltage BUS+ of the photovoltaic input terminal, and the gate voltage is lower than the source voltage. During the conduction period of the second MOSFET Q2, the bus voltage BUS+ of the photovoltaic input terminal is output to the second power output terminal NET8 through the second MOSFET Q2. The second power output terminal NET8 is connected to the positive power supply terminal of the electric heating module, and the electric heating module is powered on and operates.

[0049] When the second control signal is low, the second transistor T2 is cut off. The seventeenth resistor R17 is connected across the gate of the second MOSFET Q1 and the bus voltage BUS+ of the photovoltaic input terminal, pulling the gate potential of the second MOSFET Q2 up to the bus voltage BUS+, turning off the second MOSFET Q2. The second diode D2 is connected in reverse parallel between the second power output terminal NET8 and ground, providing a discharge path for the freewheeling current of the inductive load inside the electric heating module at the moment the second MOSFET Q2 is turned off, suppressing the turn-off voltage spike of the drain of the second MOSFET Q2, and preventing the second MOSFET Q2 from being damaged due to overvoltage breakdown.

[0050] The third power distribution unit includes protection components and charging components.

[0051] In one specific embodiment, reference is made to Figure 4The protection components include a third MOSFET Q3, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a tenth capacitor C10, an eleventh capacitor C11, and a voltage detection chip U5. The source of the third MOSFET Q3 is connected to the first terminal of the twentieth resistor R20, the anode of the third diode D3, and the bus voltage BUS+ of the photovoltaic input terminal. The gate of the third MOSFET Q3 is connected to the second terminal of the twentieth resistor R20, the first terminal of the nineteenth resistor R19, and the first terminal of the eighteenth resistor R18. The second terminal of the eighteenth resistor R18 is connected to the power distribution circuit. The third input terminal NET6, the cathode of the third diode D3 is connected to the cathode of the fourth diode D4, the positive terminal of the tenth capacitor C10 and the VDD power supply, the second terminal of the tenth capacitor C10 is grounded, the anode of the fourth diode D4 is connected to the positive terminal of the eleventh capacitor C11 and the cathode of the fifth diode D5, the negative terminal of the eleventh capacitor C11 is grounded, the drain of the third MOSFET Q3 is connected to the anode of the fifth diode D5, the power supply terminal VDD of the voltage detection chip U5 and the output terminal NET9 of the protection component, the ground terminal GND of the voltage detection chip U5 is grounded, and the output terminal VOUT of the voltage detection chip U5 is grounded through the sixth diode D6 and the second terminal of the nineteenth resistor R19.

[0052] In one specific embodiment, reference is made to Figure 4The charging component includes a lithium battery management chip U6, a 21st resistor R21, a 22nd resistor R22, a 23rd resistor R23, a 24th resistor R24, a 12th capacitor C12, a 13th capacitor C13, a 14th capacitor C14, a 15th capacitor C15, a 4th MOSFET Q4, a 1st LED LED1, a 2nd LED LED2, a 1st Zener diode ZD1, a 2nd Zener diode ZD2, a 1st inductor L1, and a battery pack BATY. The charging terminal of the lithium battery management chip U6 is connected to the first terminal of the 22nd resistor R22 and the second terminal of the 13th capacitor C13. One end of the twelfth capacitor C12, the first end of the twenty-fourth resistor R24, the source and protection component output terminal NET9 of the fourth MOSFET Q4, the second end of the twelfth capacitor C12 is grounded, the regulated output terminal VG of the lithium battery management chip U6 is connected to the second end of the thirteenth capacitor C13, the charging status indicator terminal CHRG# of the lithium battery management chip U6 is connected to the cathode of the second light-emitting diode LED2, the charging completion indicator terminal DONE# of the lithium battery management chip U6 is connected to the cathode of the first light-emitting diode LED1, and the anode of the first light-emitting diode LED1 is connected to the second light-emitting diode LED2. The anode of ED2 and the second terminal of the 22nd resistor R22 are connected to the second terminal of the 24th resistor R24 ​​and the first terminal of the 21st resistor R21. The ground terminal GND of the lithium battery management chip U6, the second terminal of the 21st resistor R21, and the second terminal of the 14th capacitor C14 are all grounded. The loop compensation terminal COM of the lithium battery management chip U6 is connected to the second terminal of the 14th capacitor C14 through the 24th resistor R24. The charging current sampling negative terminal BAT of the lithium battery management chip U6 is connected to the second terminal of the 23rd resistor R23. One end of the battery pack is connected to the first end of the fifteenth capacitor C15 and the positive end of the battery pack BATY. The negative end of the battery pack BATY is grounded. The positive terminal CSP of the charging current sampling of the lithium battery management chip U6 is connected to the second end of the twenty-third resistor R23 and the first end of the first inductor L1. The second end of the first inductor L1 is connected to the cathode of the first Zener diode ZD1 and the cathode of the second Zener diode ZD2. The anode of the first Zener diode ZD1 is grounded. The drive output terminal DRV of the lithium battery management chip U6 is connected to the gate of the fourth MOSFET Q4. The drain of the fourth MOSFET Q4 is connected to the anode of the second Zener diode ZD2.

[0053] In the specific implementation process, when the heat pump module and the electric heating module are in a shutdown state or when the power is sufficient, the controller outputs a third control signal through the third control terminal PB3. The third control signal is at a low level. The third input terminal NET6 of the power distribution circuit receives the third control signal. This signal flows into the gate of the third MOSFET Q3 through the eighteenth resistor R18. The nineteenth resistor R19 forms a discharge circuit to ground. The gate potential of the third MOSFET Q3 is lower than that of the source. The third MOSFET Q3 is turned on. The bus voltage BUS+ of the photovoltaic input terminal is output to the output terminal NET9 of the protection component through the drain of the third MOSFET Q3, and to the anode of the third diode. The third diode D3 is forward-biased and charges the tenth capacitor C10. The tenth capacitor C10 stores energy to form the auxiliary power supply VDD. The output terminal NET9 of the protection component charges the eleventh capacitor C11 through the fifth diode. The eleventh capacitor C11 completes secondary energy storage through the fourth diode D4. The auxiliary power supply VDD supplies power to the voltage detection chip U5, the first LED, and the second LED. The voltage detection chip U5 collects the bus voltage BUS+ at the photovoltaic input terminal in real time and determines that it does not exceed the overvoltage threshold. The output terminal VOUT of the bus voltage BUS+ at the photovoltaic input terminal remains in a high-impedance state, and the sixth diode D6 has no conducting current.

[0054] When the charging component is powered on, it starts MPPT (Maximum Power Point Tracking), driving the fourth MOSFET Q4 to perform high-frequency chopping and voltage reduction. The battery pack is charged with constant current and constant voltage through the first inductor L1 and the twenty-third resistor R23. During the fast charging phase, LED1 lights up. After the battery voltage reaches the full charge threshold of 3.65V, it switches to float charging, and LED2 lights up.

[0055] When the heat pump module or electric heating module is working, the controller U4 outputs a third control signal through the third control terminal PB3, switching the third input terminal NET6 of the power distribution circuit from push-pull output to high-impedance input mode. At this time, the resistance value of the twentieth resistor is less than the resistance value of the nineteenth resistor, the third MOSFET Q3 is turned off, the output terminal NET9 of the protection component has no photovoltaic power output, and the charging component stops working.

[0056] The heat pump module includes a DC compressor, a DC fan, an evaporative heat exchanger, an air outlet, an air inlet, a compressor closed loop, a pump unit, and a heat pump unit. The DC compressor compresses the low-temperature, low-pressure refrigerant after it has absorbed heat and vaporized within the compressor's closed loop, increasing its pressure and temperature to produce a high-temperature heat source for heat storage and exchange. The DC fan forces outdoor air to rapidly flush the evaporative heat exchanger, increasing the heat exchange area between the air and the refrigerant and improving the air-side heat absorption efficiency. The evaporative heat exchanger absorbs low-grade heat from the outdoor air, vaporizing it into a low-temperature gaseous refrigerant to complete the air heat extraction. The air outlet discharges the cooled air to the outside after it releases heat. The air inlet allows low-temperature outdoor air to flow in, providing a heat source for the evaporative heat exchanger.

[0057] The electric heating module includes a heat exchange and energy storage device, an electric heating device circuit, an insulation layer, a closed pipeline, a heat exchange hole array, a pump set, an exhaust device, a drain outlet, PEU-type heat exchange tubes, and a heat pump unit. The heat exchange and energy storage device includes an electric heating device, a heat exchange hole array inlet, a condenser heat exchanger, and a heat exchange hole array outlet. The heat exchange and energy storage device provides a unified heat exchange space for the underground thermal storage medium, the heat pump refrigerant, and the electric heating device. The electric heating device circuit is used to electrically heat the heat storage medium; the insulation layer is used to block heat conduction and convection between the high-temperature medium inside the heat exchange energy storage device and the outside air, thereby improving heat storage efficiency; the closed pipeline is used to carry the circulating transport of the heat storage medium; the heat exchange hole array is used to release heat to the surrounding soil when the high-temperature medium flows through it, and the medium absorbs and stores heat from the soil in winter; the pump set is used to provide circulation power for the heat storage medium, driving the medium to continuously flow back and forth between the heat exchange energy storage device and the underground heat exchange hole array for heat exchange; the exhaust device is used to discharge the air accumulated inside the pipeline; the drain outlet is used to discharge the mud, sand and impurities precipitated from the medium in the pipeline to prevent pipeline blockage; the PEU-type heat exchange tube is used to complete the heat transfer between the medium and the underground rock and soil; the heat pump unit is used to extract the underground stored heat in winter and raise the temperature of the medium to supply heat to the user end.

[0058] In practice, during spring, summer, and autumn, solar radiation intensity is high and user demand for heat energy is low. Initially, the photovoltaic monocrystalline silicon modules convert solar energy into DC power, which is then transmitted to the control module via a DC power generation line. The control module prioritizes outputting the power from the photovoltaic input through the first power output terminal, supplying it to the photovoltaic direct-drive heat pump module via the heat pump direct-drive line.

[0059] The DC compressor starts and runs, driving the refrigerant to circulate within the compressor's closed loop. The DC fan drives air to enter through the air inlet, flowing through the evaporator heat exchanger. The heat energy in the air is absorbed by the evaporator heat exchanger, and then compressed by the DC compressor to a high temperature and high pressure state. The refrigerant flows through the condenser heat exchanger to release heat, and the refrigerant returns to the DC compressor through the compressor's closed loop, completing the heat pump cycle.

[0060] The heat generated by the condenser heat exchanger enters the closed pipeline through the inlet of the heat exchange hole array. The pump unit starts and runs, forcibly driving the heat exchange medium to circulate in the closed pipeline, transferring the heat through the PEU-type heat exchange tube to the soil around the heat exchange hole array for storage. The heat exchanged medium returns to the condenser heat exchanger through the outlet of the heat exchange hole array to absorb heat again. This cycle is repeated to complete the inter-seasonal storage of solar energy.

[0061] When the input power at the photovoltaic input terminal is lower than the preset power threshold, or when the temperature represented by the temperature signal is lower than the preset temperature threshold, the power distribution circuit in the control module will switch the power to the second power output terminal and supply it to the electric heating module via the electric heating direct drive circuit.

[0062] An electric heating device is installed in the electric heating circuit, which directly converts electrical energy into heat energy and directly heats the heat exchange medium in the closed pipeline through a pipe heater. The pump unit forces the heated high-temperature heat exchange medium to circulate in the closed pipeline, flowing through the PEU-type heat exchange tubes, and transferring heat to the soil around the heat exchange hole array for storage, achieving a cross-seasonal heat storage effect.

[0063] When the outdoor temperature is below -5°C, the heating efficiency of the heat pump unit drops significantly. At this time, switching to electric heating devices for direct heating can avoid wear and energy efficiency reduction caused by long-term operation of the DC compressor under harsh conditions.

[0064] When neither the heat pump module nor the electric heating module is operating, or when the input power at the photovoltaic input terminal exceeds the total power requirement of the heat pump module and the electric heating module, the control module stores all excess electrical energy in the battery pack through the energy storage interface to supply the equipment for nighttime use, thus achieving the charging and discharging function. The battery pack uses lithium iron phosphate batteries.

[0065] For example, when photovoltaic power generation cannot supply the heat pump module or electric heating module during equipment maintenance, the control module directly stores the DC power generated by the photovoltaic monocrystalline silicon modules into the battery pack through the energy storage interface. At night or on cloudy or rainy days, the battery pack releases the stored electrical energy and supplies it to the heat pump module or electric heating module through the power distribution circuit of the control module, ensuring the system operates around the clock.

[0066] In winter, when solar radiation is weak, the photovoltaic monocrystalline silicon modules absorb and convert less electrical energy, insufficient to power the heat pump or electric heating modules to generate enough heat. In this case, the battery bank releases stored electrical energy, which is then supplied to the heat pump module via the control module. The heat pump module assists in operation, while the electric heating module's piping transfers heat stored in the surrounding soil to the heat exchange medium through closed pipes and PEU-type heat exchange tubes. This heat is then forced to circulate by the pump unit, and further amplified by the heat pump unit before being delivered to the user, thus achieving efficient utilization of stored solar energy across seasons.

[0067] In practice, the exhaust device is installed at a high point in the closed pipeline to remove gas from the pipeline, preventing air resistance from affecting the normal operation of the pump unit and the overall heat exchange efficiency, and ensuring smooth circulation of the heat exchange medium. The drain outlet is located at a low point in the closed pipeline to periodically clean impurities and deposits from the pipeline, ensuring long-term stable operation of the system.

[0068] PEU type heat exchange tubes can use conventional PE tubes. PE tubes have the characteristics of high strength, high temperature resistance, corrosion resistance, non-toxicity, and wear resistance. They also have good thermal conductivity and low fluid resistance, which can efficiently complete the heat transfer between soil and medium while reliably transporting the heat exchange medium.

[0069] The heat exchange hole array is vertically buried below the ground at a depth of 120m, with a spacing of 5m between the holes. Multiple layers can be arranged, resulting in uniform heat distribution, a compact overall structure, higher soil utilization, smaller footprint, and less land resource consumption.

[0070] This device uses photovoltaic monocrystalline silicon modules to convert solar energy into DC power, which is then transmitted to the control module via a DC power generation line. The control module has built-in acquisition circuits, controllers, and power distribution circuits to allocate power according to preset priorities. When the photovoltaic power is sufficient, the control module prioritizes supplying DC power to the heat pump module through the heat pump direct drive line. The DC compressor drives the refrigerant to circulate in the compressor's closed loop, and the DC fan drives outdoor air to flow from the air inlet across the surface of the evaporator heat exchanger. The refrigerant absorbs heat energy from the air and evaporates into a gaseous state. After being adiabatically compressed by the compressor into a high-temperature, high-pressure gaseous state, it enters the condenser heat exchanger and exchanges heat with circulating water from the inlet of the heat exchange hole array to produce hot water. The hot water flows into the heat exchange energy storage device through the outlet of the heat exchange hole array and stores the heat in the soil and rock mass through the underground heat exchange hole array, achieving cross-seasonal heat storage. When the photovoltaic power is insufficient or the outdoor temperature is below -5℃, the control module supplies DC power to the electric heating module through the electric heating direct drive line. The electric heating module directly converts the electrical energy into heat energy and directly heats the circulating medium in the closed pipeline of the heat exchange hole through the pipeline heater. The medium flows into the heat exchange energy storage device to achieve cross-seasonal heat storage. When the photovoltaic power meets the needs of both the heat pump module and the electric heating module and there is still a surplus, or when both the heat pump module and the electric heating module are in a shutdown state, the control module will send the excess power to the battery pack for storage; at night or on cloudy or rainy days when the photovoltaic monocrystalline silicon module has no output, the battery pack will discharge in reverse, supplying the stored DC power to the heat pump module or the electric heating module to achieve the discharge function.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0073] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0074] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0075] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0076] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0078] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A photovoltaic direct-drive heat pump thermal storage power distribution device, characterized in that, include: The control module (3) is equipped with a data acquisition circuit, a controller and a power distribution circuit. The control module (3) has a photovoltaic input terminal, a first power output terminal, a second power output terminal and an energy storage interface. A photovoltaic monocrystalline silicon module (1) is electrically connected to the photovoltaic input terminal of the control module (3); The battery pack (4) is electrically connected to the energy storage interface of the control module (3); The heat pump module is electrically connected to the first power output terminal of the control module (3); The electric heating module is electrically connected to the second power output terminal of the control module (3); The acquisition circuit is used to acquire the output voltage, output current and ambient temperature of the photovoltaic monocrystalline silicon module (1), and output a first voltage signal, a second voltage signal and a temperature signal; The controller is used to calculate the input power of the photovoltaic input terminal based on the first voltage signal and the second voltage signal, and compare the input power of the photovoltaic input terminal with a preset power threshold and compare the temperature signal with a preset temperature threshold. The power distribution circuit is configured to: preferentially output electrical energy from the photovoltaic input terminal through the first power output terminal to supply the heat pump module; when the input power at the photovoltaic input terminal is lower than a preset power threshold or the temperature represented by the temperature signal is lower than a preset temperature threshold, switch the electrical energy to the second power output terminal to supply the electric heating module, and store excess electrical energy in the battery pack (4) through the energy storage interface.

2. The photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 1, characterized in that, The power distribution circuit includes a first power distribution unit, a second power distribution unit, and a third power distribution unit. The first power distribution unit includes a first MOSFET, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first transistor, and a first diode. The source of the first MOSFET is connected to the first terminal of the thirteenth resistor and the bus voltage of the photovoltaic input terminal. The drain of the first MOSFET is connected to the cathode of the first diode and the first power output terminal. The anode of the first diode is grounded. The gate of the first MOSFET is connected to the first terminal of the twelfth resistor and the second terminal of the thirteenth resistor. The second terminal of the twelfth resistor is connected to the collector of the first transistor. The emitter of the first transistor is grounded. The base of the first transistor is connected to the first terminal of the tenth resistor and the first terminal of the eleventh resistor. The second terminal of the eleventh resistor is grounded. The second terminal of the tenth resistor is connected to the first input terminal of the power distribution circuit.

3. The photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 2, characterized in that, The second power distribution unit includes a second MOSFET, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a second transistor, and a second diode. The source of the second MOSFET is connected to the first terminal of the seventeenth resistor and the bus voltage of the photovoltaic input terminal. The drain of the second MOSFET is connected to the cathode of the second diode and the second power output terminal. The anode of the second diode is grounded. The gate of the second MOSFET is connected to the first terminal of the sixteenth resistor and the second terminal of the seventeenth resistor. The second terminal of the sixteenth resistor is connected to the collector of the second transistor. The emitter of the second transistor is grounded. The base of the second transistor is connected to the first terminal of the fourteenth resistor and the first terminal of the fifteenth resistor. The second terminal of the fifteenth resistor is grounded. The second terminal of the fourteenth resistor is connected to the second input terminal of the power distribution circuit.

4. The photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 3, characterized in that, The third power distribution unit includes a protection component and a charging component. The protection component includes a third MOSFET, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a third diode, a fourth diode, a fifth diode, a sixth diode, a tenth capacitor, an eleventh capacitor, and a voltage detection chip. The source of the third MOSFET is connected to the first terminal of the twentieth resistor, the anode of the third diode, and the bus voltage of the photovoltaic input terminal. The gate of the third MOSFET is connected to the second terminal of the twentieth resistor, the first terminal of the nineteenth resistor, and the first terminal of the eighteenth resistor. The second terminal of the eighteenth resistor is connected to the third input terminal of the power distribution circuit. The cathode of the third diode is connected to the cathode of the fourth diode, the positive terminal of the tenth capacitor, and the VDD power supply. The second terminal of the tenth capacitor is grounded. The anode of the fourth diode is connected to the positive terminal of the eleventh capacitor and the cathode of the fifth diode. The negative terminal of the eleventh capacitor is grounded. The drain of the third MOSFET is connected to the anode of the fifth diode, the power supply terminal VDD of the voltage detection chip, and the output terminal of the protection component. The ground terminal GND of the voltage detection chip is grounded. The output terminal of the voltage detection chip is grounded through the sixth diode and the second terminal of the nineteenth resistor.

5. A photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 4, characterized in that, The charging assembly includes a lithium battery management chip, a 21st resistor, a 22nd resistor, a 23rd resistor, a 24th resistor, a 12th capacitor, a 13th capacitor, a 14th capacitor, a 15th capacitor, a fourth MOSFET, a first light-emitting diode (LED), a second LED, a first Zener diode, a second Zener diode, a first inductor, and a battery pack. The charging terminal of the lithium battery management chip is connected to the first terminal of the 22nd resistor, the first terminal of the 13th capacitor, the first terminal of the 12th capacitor, the first terminal of the 24th resistor, the source of the fourth MOSFET, and the output terminal of the protection assembly. The second terminal of the 12th capacitor is grounded. The regulated output terminal of the lithium battery management chip is connected to the second terminal of the 13th capacitor. The charging status indicator terminal of the lithium battery management chip is connected to the cathode of the second LED. The charging completion indicator terminal of the lithium battery management chip is connected to the cathode of the first LED. The anode of the first LED is connected to the anode of the second LED and the second terminal of the 22nd resistor. The photovoltaic maximum power tracking sampling terminal of the lithium battery management chip is connected to the second terminal of the 24th resistor and the first terminal of the 21st resistor. The ground terminal of the lithium battery management chip, the second terminal of the 21st resistor, and the second terminal of the 14th capacitor are all grounded. The loop compensation terminal COM of the lithium battery management chip is connected to the second terminal of the 14th capacitor through the 24th resistor. The negative terminal of the charging current sampling of the lithium battery management chip is connected to the first terminal of the 23rd resistor, the first terminal of the 15th capacitor, and the positive terminal of the battery pack. The negative terminal of the battery pack is grounded. The positive terminal of the charging current sampling of the lithium battery management chip is connected to the second terminal of the 23rd resistor and the first terminal of the first inductor. The second terminal of the first inductor is connected to the cathode of the first Zener diode and the cathode of the second Zener diode. The anode of the first Zener diode is grounded. The drive output terminal of the lithium battery management chip is connected to the gate of the fourth MOSFET. The drain of the fourth MOSFET is connected to the anode of the second Zener diode.

6. The photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 1, characterized in that, The heat pump module includes a DC compressor (11), a DC fan (12), an evaporative heat exchanger (13), an air outlet (14), an air inlet (15), a compressor closed loop (16), a pump unit (22), and a heat pump unit (26).

7. A photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 6, characterized in that, The electric heating module includes a heat exchange and energy storage device (17), an electric heating device circuit (18), an insulation layer (19), a closed pipeline (20), a heat exchange hole array (21), and a PEU-type heat exchange tube (25).

8. A photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 7, characterized in that, The heat exchange and energy storage device (17) includes an electric heating device (6), a heat exchange hole array inlet (8), a condenser heat exchanger (9), and a heat exchange hole array outlet (10).

9. A photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 8, characterized in that, The heat exchange energy storage device (17) is connected to the heat exchange hole array (21) through the heat exchange hole array inlet (8), the heat exchange hole array outlet (10), the closed pipeline (20) to form a heat storage medium circulation channel.

10. A photovoltaic direct-drive heat pump thermal storage power distribution device according to claim 9, characterized in that, The heat exchange and energy storage device (17) is equipped with an exhaust device (23) and a drain outlet (24).

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