Air source heat pump outdoor unit and power line carrier communication temperature control system

Abstract

The utility model relates to a kind of air source heat pump outdoor unit and temperature control system of power carrier communication, including casing, photovoltaic power generation device and power switching circuit, the compressor, heat exchanger, fan and electric control board are equipped in the casing, the photovoltaic power generation device includes at least one photovoltaic panel, the photovoltaic panel covers at least one outer surface of the casing;The power switching circuit includes DC input end and mains input end, the DC input end is electrically connected by wire with the photovoltaic panel, and the mains input end is electrically connected with mains grid;The output end of the power switching circuit is electrically connected with the input end of the electric control board, and the compressor and fan are electrically connected with the output end of the electric control board respectively, to realize the automatic switching power supply of photovoltaic electric energy and mains electric energy.When photovoltaic electric energy is insufficient, it is automatically switched to mains, to ensure that unit continues stable operation, improve the reliability and energy-saving effect of system.

Description

Technical Field

[0001] This utility model relates to a temperature control system for an air source heat pump outdoor unit and power line carrier communication. Background Technology

[0002] Air source heat pumps, as energy-saving devices that utilize low-grade heat energy for energy conversion, are widely used in heating, cooling, and domestic hot water applications. Existing air source heat pump outdoor units typically include a compressor, heat exchanger, fan, and electrical control system. In current technology, air source heat pump outdoor units generally rely on mains power, resulting in significant energy consumption and high operating costs over long periods. Furthermore, due to grid pressure during peak electricity consumption periods, traditional mains-powered heat pump equipment still has room for improvement in terms of energy conservation and environmental protection. With the continuous development of renewable energy utilization, solar photovoltaic power generation, due to its clean, green, and sustainable nature, has been widely applied in buildings, transportation, and independent power generation systems.

[0003] However, existing air source heat pump outdoor units do not organically integrate photovoltaic power generation devices with their casing structure, nor do they form a power supply mode that switches between photovoltaic power generation and grid power, thus failing to make full use of solar energy resources to reduce energy consumption. Utility Model Content

[0004] The primary objective of this invention is to provide an air source heat pump outdoor unit that can operate partially or entirely powered by photovoltaics under sunlight conditions, and switch to mains power when photovoltaic power generation is insufficient, thereby achieving energy saving, consumption reduction, and improved operational reliability.

[0005] The second objective of this invention is to provide a temperature control system that enables unified communication and coordinated control between the outdoor unit of an air source heat pump and terminal equipment and controller via power line carrier communication.

[0006] The primary objective of this invention is achieved as follows: An outdoor unit for an air source heat pump includes a casing, a photovoltaic power generation device, and a power switching circuit. The casing contains a compressor, a heat exchanger, a fan, and an electronic control board. The photovoltaic power generation device includes at least one photovoltaic panel, which covers at least one outer surface of the casing. The power switching circuit includes a DC input terminal and an AC input terminal. The DC input terminal is electrically connected to the photovoltaic panel via a wire, and the AC input terminal is electrically connected to the AC power grid. The output terminal of the power switching circuit is electrically connected to the input terminal of the electronic control board, and the compressor and fan are respectively electrically connected to the output terminal of the electronic control board to realize automatic switching between photovoltaic power and AC power.

[0007] By introducing a photovoltaic power generation device into the outdoor unit of the air source heat pump and combining it with a power switching circuit, automatic switching between photovoltaic power and mains power is achieved. This not only makes full use of clean and renewable energy, reducing the energy consumption and operating costs of the unit, but also automatically switches to mains power when photovoltaic power is insufficient, ensuring the continuous and stable operation of the unit and improving the reliability and energy-saving effect of the system.

[0008] The primary objective of this utility model can also be achieved by the following technical measures: Furthermore, the photovoltaic panels are fixed to the top and front sides of the casing, respectively.

[0009] The photovoltaic panels are installed on the top and front sides of the casing, allowing them to receive more solar radiation from different angles, improving photovoltaic power generation efficiency, increasing the unit's utilization of renewable energy, and thus further enhancing energy-saving performance.

[0010] Furthermore, the photovoltaic panel is fixed to the outer wall of the housing by a waterproof sealing ring, and a heat dissipation gap is formed between the photovoltaic panel and the housing.

[0011] The photovoltaic panel is fixed to the outer wall of the casing by a waterproof sealing ring, and a heat dissipation gap is formed between the photovoltaic panel and the casing. This not only enhances the waterproof protection between the photovoltaic panel and the casing, preventing rainwater from seeping in and causing damage, but also effectively reduces the operating temperature of the photovoltaic panel through the heat dissipation gap, thereby improving the power generation efficiency and service life of the photovoltaic module.

[0012] Furthermore, a tempered glass layer is provided on the surface of the photovoltaic panel, and a dustproof and waterproof coating is provided on the outer surface of the tempered glass layer.

[0013] The photovoltaic panel is fixed to the outer wall of the casing by a waterproof sealing ring, and a heat dissipation gap is formed between the photovoltaic panel and the casing. This not only enhances the waterproof protection between the photovoltaic panel and the casing, preventing rainwater from seeping in and causing damage, but also effectively reduces the operating temperature of the photovoltaic panel through the heat dissipation gap, thereby improving the power generation efficiency and service life of the photovoltaic module.

[0014] The second objective of this utility model is achieved as follows: A temperature control system using power line carrier communication includes: an air source heat pump unit for providing cooling, heating, and domestic hot water; Fan coil units and underfloor heating coil units serve as terminal heat exchange devices; The Modbus to PLC gateway has its input terminal connected to the communication interface of the air source heat pump host, and is used to convert Modbus communication signals into PLC communication signals. A PLC fan coil unit controller is electrically connected to the fan coil unit and is used to control the operating status of the fan coil unit. The PLC floor heating actuator controller is electrically connected to the actuator corresponding to the floor heating coil and is used to control the operating status of the floor heating coil. A PLC thermostat is installed in the room to collect indoor temperature data and receive user input. The Modbus to PLC gateway, PLC fan coil controller, PLC floor heating actuator controller, and PLC thermostat are all interconnected via power line carrier communication.

[0015] By introducing a Modbus-to-PLC gateway between the air source heat pump unit and the terminal devices, and utilizing power line carrier technology to achieve interconnection and communication between the PLC fan coil controller, PLC floor heating actuator controller, and PLC thermostat, the entire system can complete signal transmission using existing power lines without the need for additional control wiring. This significantly reduces construction and renovation costs and avoids the problems of complex wiring, signal attenuation, and poor anti-interference in traditional wired communication. Simultaneously, the system achieves unified communication and collaborative control between the air source heat pump unit and the terminal devices, intelligently adjusting the operating status of the fan coil units and floor heating coils according to user needs. This improves energy efficiency, ensures stable and comfortable indoor temperatures, and offers excellent scalability and adaptability, making it particularly suitable for buildings with high requirements for energy efficiency, comfort, and ease of construction.

[0016] The beneficial effects of this utility model are as follows: This invention introduces a photovoltaic power generation device into the outdoor unit of an air source heat pump and combines it with a power switching circuit to achieve automatic switching between photovoltaic power and mains power. This not only makes full use of clean and renewable energy, reducing the energy consumption and operating costs of the unit, but also automatically switches to mains power when photovoltaic power is insufficient, ensuring the continuous and stable operation of the unit and improving the reliability and energy-saving effect of the system.

[0017] This invention uses a waterproof sealing ring to fix the photovoltaic panel to the outer wall of the housing, and forms a heat dissipation gap between the photovoltaic panel and the housing. This not only enhances the waterproof protection between the photovoltaic panel and the housing, preventing rainwater from seeping in and causing damage, but also effectively reduces the operating temperature of the photovoltaic panel through the heat dissipation gap, thereby improving the power generation efficiency and service life of the photovoltaic module.

[0018] This invention uses a waterproof sealing ring to fix the photovoltaic panel to the outer wall of the housing, and forms a heat dissipation gap between the photovoltaic panel and the housing. This not only enhances the waterproof protection between the photovoltaic panel and the housing, preventing rainwater from seeping in and causing damage, but also effectively reduces the operating temperature of the photovoltaic panel through the heat dissipation gap, thereby improving the power generation efficiency and service life of the photovoltaic module.

[0019] This invention introduces a Modbus-to-PLC gateway between the air source heat pump main unit and the terminal devices, and utilizes power line carrier technology to achieve interconnection and communication between the PLC fan coil controller, PLC floor heating actuator controller, and PLC thermostat. This allows the entire system to complete signal transmission using existing power lines without the need for additional control wiring, significantly reducing construction and renovation costs and avoiding the problems of complex wiring, signal attenuation, and poor anti-interference in traditional wired communication. Simultaneously, the system achieves unified communication and collaborative control between the air source heat pump main unit and the terminal devices, intelligently adjusting the operating status of the fan coil and floor heating coils according to user needs, thereby improving energy efficiency, ensuring stable and comfortable indoor temperatures, and possessing good scalability and adaptability. It is particularly suitable for building sites with high requirements for energy efficiency, comfort, and ease of construction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the outdoor unit of an air source heat pump.

[0021] Figure 2 This is a partial exploded view of the outdoor unit of an air source heat pump.

[0022] Figure 3 A cross-sectional view of the top assembly of the photovoltaic panel and the casing.

[0023] Figure 4 This is the circuit diagram of the outdoor unit of an air source heat pump.

[0024] Figure 5 This is a schematic diagram of a temperature control system using power line carrier communication. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 5 As shown, an air source heat pump outdoor unit 7 includes a housing 1, a photovoltaic power generation device and a power switching circuit 3. The housing 1 is equipped with a compressor 11, a heat exchanger 12, a fan 13 and an electronic control board 14. The photovoltaic power generation device includes at least one photovoltaic panel 2, which covers at least one outer surface of the housing 1. The power switching circuit 3 includes a DC input terminal 31 and an AC input terminal 41. The DC input terminal 31 is electrically connected to the photovoltaic panel 2 via a wire, and the AC input terminal 41 is electrically connected to the AC power grid. The output terminal of the power switching circuit 3 is electrically connected to the input terminal of the electronic control board 14, and the compressor 11 and the fan 13 are respectively electrically connected to the output terminal of the electronic control board 14 to realize automatic switching between photovoltaic power and AC power.

[0026] Furthermore, the photovoltaic panel 2 is fixed to the top surface and the front side of the housing 1, respectively.

[0027] Furthermore, the photovoltaic panel 2 is fixed to the outer wall of the housing 1 by a waterproof sealing ring 3, and a heat dissipation gap 4 is formed between the photovoltaic panel 2 and the housing 1.

[0028] Furthermore, a tempered glass layer 5 is provided on the surface of the photovoltaic panel 2, and a dustproof and waterproof coating 6 is provided on the outer surface of the tempered glass layer 5.

[0029] A temperature control system using power line carrier communication, comprising: The air source heat pump unit 7 is used to provide cooling, heating and domestic hot water; Fan coil unit 8 and underfloor heating coil unit 9 serve as terminal heat exchange devices; Modbus to PLC gateway 10, whose input terminal is connected to the communication interface of the air source heat pump host 7, is used to convert Modbus communication signals into PLC communication signals; The PLC fan coil controller 20 is electrically connected to the fan coil unit 8 and is used to control the operating status of the fan coil unit 8. The PLC floor heating actuator controller 30 is electrically connected to the actuator corresponding to the floor heating coil 9 and is used to control the operating status of the floor heating coil 9. PLC thermostat 40 is installed in the room to collect indoor temperature and receive user input; The Modbus to PLC gateway 10, PLC fan coil controller 20, PLC floor heating actuator 30 and PLC thermostat 40 are all interconnected via power line carrier communication.

[0030] The method for switching the power supply mode of the outdoor unit of an air source heat pump is as follows: When the DC power generated by the photovoltaic power generation device meets the operating requirements of the outdoor unit, the power switching circuit 3 prioritizes inputting the DC power to the control board 14 to power the compressor 11 and the fan 13. When the photovoltaic power is insufficient or interrupted, the power switching circuit 3 automatically switches to the mains power input terminal 41, and the mains power provides a stable power supply to the outdoor unit, thereby achieving seamless switching between photovoltaic power and mains power. This method can maximize the use of clean energy, reduce mains power consumption, save operating costs, and reduce carbon emissions while ensuring continuous and stable operation of the equipment, thus improving the energy-saving and environmental protection performance of the system.

[0031] Operation method of temperature control system based on power line carrier communication interconnection: The user sets the temperature or selects the operating mode on the PLC thermostat 40. The command is transmitted to the PLC fan coil controller 20 or the PLC floor heating actuator controller 30 via a power line carrier signal. The corresponding controller adjusts the operating status of the fan coil 8 or the floor heating coil 9 according to the received command. At the same time, the Modbus to PLC gateway 10 interacts with the air source heat pump host 7 to realize the coordinated work of the host and the terminal device.

[0032] This method allows all devices to communicate using existing power lines without additional wiring, reducing construction and renovation costs and avoiding signal attenuation and interference problems associated with traditional wired communication. It can significantly improve the system's energy efficiency and operational stability, and provide users with a more comfortable and intelligent user experience.

Claims

1. An outdoor unit for an air source heat pump, comprising a casing, a photovoltaic power generation device, and a power switching circuit, wherein the casing contains a compressor, a heat exchanger, a fan, and an electronic control board, characterized in that: The photovoltaic power generation device includes at least one photovoltaic panel, which covers at least one outer surface of the housing; The power switching circuit includes a DC input terminal and an AC input terminal. The DC input terminal is electrically connected to the photovoltaic panel via a wire, and the AC input terminal is electrically connected to the AC power grid. The output terminal of the power switching circuit is electrically connected to the input terminal of the electronic control board, and the compressor and fan are respectively electrically connected to the output terminal of the electronic control board to realize automatic switching between photovoltaic power and mains power.

2. The outdoor unit of the air source heat pump according to claim 1, characterized in that: The photovoltaic panels are fixed to the top and front sides of the casing, respectively.

3. The outdoor unit of the air source heat pump according to claim 1, characterized in that: The photovoltaic panel is fixed to the outer wall of the casing by a waterproof sealing ring, and a heat dissipation gap is formed between the photovoltaic panel and the casing.

4. The outdoor unit of the air source heat pump according to claim 1, characterized in that: The photovoltaic panel has a tempered glass layer on its surface, and the outer surface of the tempered glass layer has a dustproof and waterproof coating.

5. A temperature control system using power line carrier communication, characterized in that: Includes an outdoor unit of an air source heat pump as described in any one of claims 1 to 4, used to provide cooling, heating and domestic hot water; Fan coil units and underfloor heating coil units serve as terminal heat exchange devices; The Modbus to PLC gateway has its input terminal connected to the communication interface of the outdoor unit of the air source heat pump, and is used to convert Modbus communication signals into PLC communication signals. A PLC fan coil unit controller is electrically connected to the fan coil unit and is used to control the operating status of the fan coil unit. The PLC floor heating actuator controller is electrically connected to the actuator corresponding to the floor heating coil and is used to control the operating status of the floor heating coil. A PLC thermostat is installed in the room to collect indoor temperature data and receive user input. The Modbus to PLC gateway, PLC fan coil controller, PLC floor heating actuator controller, and PLC thermostat are all interconnected via power line carrier communication.

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