Air source heat pump outdoor unit with defrosting function

Abstract

The utility model relates to an air source heat pump outdoor unit with defrosting function, including the casing, the environmental temperature sensor for monitoring environmental temperature, the coil temperature sensor for monitoring heat exchanger coil temperature, photovoltaic power generation device and power switching circuit, the inside of casing is equipped with compressor, heat exchanger, fan and electric control board, the photovoltaic power generation device includes at least one photovoltaic board, the photovoltaic board covers at least one outer surface of casing, through introducing photovoltaic power generation device in air source heat pump outdoor unit, and combining power switching circuit, realized the automatic switching power supply of photovoltaic electric energy and commercial power, not only can make full use of clean renewable energy, reduce the energy consumption and use cost of unit operation, still can automatically switch to commercial power when photovoltaic electric energy is insufficient, ensure unit continuous steady operation, improve the reliability and energy -conserving effect of system.

Description

Technical Field

[0001] This utility model relates to an outdoor unit of an air source heat pump with a defrosting function. 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 purpose of this utility model is to provide an air source heat pump outdoor unit with a defrosting function that can operate partially or entirely by relying on photovoltaic power supply under sunlight conditions, and switch to mains power supply when photovoltaic power generation is insufficient, thereby achieving energy saving, consumption reduction and improved operational reliability.

[0005] The purpose of this utility model is achieved as follows: An outdoor unit of an air source heat pump with defrosting function includes a casing, an ambient temperature sensor for monitoring ambient temperature, a coil temperature sensor for monitoring heat exchanger coil temperature, 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. The electronic control board is equipped with a defrost control module. The ambient temperature sensor and the coil temperature sensor are electrically connected to the electronic control board. The defrost control module controls the outdoor unit of the air source heat pump to enter or exit the defrost mode based on the monitoring results of the ambient temperature sensor and the coil temperature sensor.

[0006] 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.

[0007] The defrosting control module is integrated into the control board. Combined with the monitoring results of the ambient temperature sensor and the coil temperature sensor, it can intelligently judge the frost status and automatically control the outdoor unit to enter or exit the defrosting mode. This avoids manual intervention, improves the timeliness and accuracy of defrosting, ensures the operating efficiency and reliability of the unit in low-temperature environments, and extends the service life of the equipment.

[0008] The 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] Furthermore, the power switching circuit includes a DC / AC inverter module and an AC power switching relay. The input terminal of the inverter module is electrically connected to the DC input terminal, and the output terminal of the inverter module is electrically connected to the first input terminal of the AC power switching relay. The second input terminal of the mains power switching relay is electrically connected to the mains power input terminal, and the output terminal of the mains power switching relay is electrically connected to the input terminal of the electronic control board.

[0015] By setting up DC / AC inverter modules and mains switching relays in the power switching circuit, the efficient conversion of photovoltaic DC power to AC power is realized, and the system can quickly switch to mains power supply when photovoltaic power is insufficient, thereby ensuring the stable operation of the control board, compressor and fan, and improving the overall power supply flexibility and reliability of the unit.

[0016] Furthermore, it also includes a power detection module, the input terminal of which is electrically connected to the DC input terminal, for real-time detection of photovoltaic power generation; The signal output terminal of the power detection module is electrically connected to the control terminal of the mains power switching relay, and is used to provide a control signal to the mains power switching relay.

[0017] The power detection module is set up to monitor the photovoltaic power generation in real time and output the detection signal to the control terminal of the mains power switching relay. This enables dynamic judgment and automatic switching control of the photovoltaic power supply capacity, allowing the system to intelligently select the best power supply mode under different lighting conditions, ensuring the continuity of unit operation and the optimization of energy utilization.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] This invention integrates a defrosting control module into the electrical control board. By combining the monitoring results of the ambient temperature sensor and the coil temperature sensor, it can intelligently determine the frost status and automatically control the outdoor unit to enter or exit the defrosting mode, thereby avoiding manual intervention, improving the timeliness and accuracy of defrosting, ensuring the operating efficiency and reliability of the unit in low-temperature environments, and extending the service life of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the outdoor unit of an air source heat pump with a defrosting function.

[0023] Figure 2 This is a partial exploded view of the outdoor unit of an air source heat pump with defrosting function.

[0024] Figure 3 A cross-sectional view of the top assembly of the photovoltaic panel and the casing.

[0025] Figure 4 This is the circuit diagram of the outdoor unit of an air source heat pump with defrosting function. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 4 As shown, an outdoor unit of an air source heat pump with defrosting function includes a housing 1, an ambient temperature sensor 2 for monitoring ambient temperature, a coil temperature sensor 3 for monitoring the temperature of the heat exchanger coil, a photovoltaic power generation device, and a power switching circuit 5. 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 4, which covers at least one outer surface of the housing 1. The power switching circuit 5 includes a DC input terminal 51 and an AC input terminal 52. The DC input terminal 51 is electrically connected to the photovoltaic panel 4 through a wire, and the AC input terminal 52 is electrically connected to the AC power grid. The output terminal of the power switching circuit 5 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 mains power. The electronic control board 14 is equipped with a defrost control module 141. The ambient temperature sensor 2 and the coil temperature sensor 3 are electrically connected to the electronic control board 14. The defrost control module 141 controls the outdoor unit of the air source heat pump to enter or exit the defrost mode according to the monitoring results of the ambient temperature sensor 2 and the coil temperature sensor 3.

[0027] Furthermore, the photovoltaic panel 4 is fixed to the top surface 15 and the front side surface 16 of the housing 1, respectively.

[0028] Furthermore, the photovoltaic panel 4 is fixed to the outer wall of the housing 1 by a waterproof sealing ring 6, and a heat dissipation gap 61 is formed between the photovoltaic panel 4 and the housing 1.

[0029] Furthermore, a tempered glass layer 7 is provided on the surface of the photovoltaic panel 4, and a dustproof and waterproof coating 8 is provided on the outer surface of the tempered glass layer 7.

[0030] Furthermore, the power switching circuit 5 includes a DC / AC inverter module 9 and a mains power switching relay 10. The input terminal of the inverter module 9 is electrically connected to the DC input terminal 51, and the output terminal of the inverter module 9 is electrically connected to the first input terminal of the mains power switching relay 10. The second input terminal of the mains power switching relay 10 is electrically connected to the mains power input terminal 52, and the output terminal of the mains power switching relay 10 is electrically connected to the input terminal of the control board 14.

[0031] Furthermore, it also includes a power detection module 20, the input terminal of which is electrically connected to the DC input terminal 51, for real-time detection of photovoltaic power generation; The signal output terminal of the power detection module 20 is electrically connected to the control terminal of the mains power switching relay 10, and is used to provide a control signal to the mains power switching relay 10.

[0032] The method for switching the power supply mode of the outdoor unit of an air source heat pump is as follows: The photovoltaic panel 4 outputs direct current under solar irradiation, which is converted into alternating current by the DC / AC inverter module 9 and then supplied to the electronic control board 14. The power detection module 20 monitors the photovoltaic power generation in real time. When the photovoltaic power generation meets the unit's operating requirements, the power detection module 20 outputs a control signal to the mains power switching relay 10. The relay remains in the photovoltaic power supply path state to achieve photovoltaic priority power supply. When the photovoltaic power generation is insufficient to meet the needs of the unit's operation, the power detection module 20 sends a switching command to the mains power switching relay 10, and the relay automatically switches the power supply path to the mains power input terminal 52, thereby ensuring that the outdoor unit can operate stably under different lighting conditions.

[0033] Implementation of intelligent defrosting method: The outdoor unit of the air source heat pump has a built-in defrost control module 141 on its electrical control board 14. The defrost control module 141 receives monitoring signals from the ambient temperature sensor 2 and the coil temperature sensor 3, and makes intelligent judgments based on the unit's operating time. When the ambient temperature is above -10℃ and the unit has been running continuously for more than 45 minutes, if the coil temperature is below -7℃, it will enter defrosting mode. When the ambient temperature is below or equal to -10℃, if the unit runs continuously for more than 90 minutes and the coil temperature is below -7℃, or if the unit runs for more than 45 minutes and the difference between the ambient temperature and the coil temperature is greater than or equal to 10℃, then the unit will enter defrosting mode. During the defrosting process, the electronic control board 14 continuously monitors the data of the ambient temperature sensor 2 and the coil temperature sensor 3. When the coil temperature rises and the difference between the ambient temperature and the coil temperature returns to the set normal range, the control system automatically exits the defrosting mode, realizing adaptive defrosting control under different environmental conditions, and ensuring the unit's operating efficiency and reliability.

Claims

1. An outdoor unit of an air source heat pump with defrosting function, comprising a casing, an ambient temperature sensor for monitoring ambient temperature, a coil temperature sensor for monitoring heat exchanger coil temperature, a photovoltaic power generation device, and a power switching circuit, wherein a compressor, a heat exchanger, a fan, and an electronic control board are disposed inside the casing, 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 AC power. The electronic control board is equipped with a defrost control module. The ambient temperature sensor and the coil temperature sensor are electrically connected to the electronic control board. The defrost control module controls the outdoor unit of the air source heat pump to enter or exit the defrost mode based on the monitoring results of the ambient temperature sensor and the coil temperature sensor.

2. The outdoor unit of an air source heat pump with defrosting function 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 an air source heat pump with defrosting function 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 an air source heat pump with defrosting function 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. The outdoor unit of an air source heat pump with defrosting function according to claim 1, characterized in that: The power switching circuit includes a DC / AC inverter module and an AC power switching relay. The input terminal of the inverter module is electrically connected to the DC input terminal, and the output terminal of the inverter module is electrically connected to the first input terminal of the AC power switching relay. The second input terminal of the mains power switching relay is electrically connected to the mains power input terminal, and the output terminal of the mains power switching relay is electrically connected to the input terminal of the electronic control board.

6. The outdoor unit of an air source heat pump with defrosting function according to claim 5, characterized in that: It also includes a power detection module, the input of which is electrically connected to the DC input, for real-time detection of photovoltaic power generation; The signal output terminal of the power detection module is electrically connected to the control terminal of the mains power switching relay, and is used to provide a control signal to the mains power switching relay.

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