Solar energy power and heat supplementing air source heat pump heating system and working method

Abstract

This invention proposes a solar-powered, frost-free air-source heat pump heating system and its operating method. It includes interconnected solar PV / T modules, an air-source heat pump unit, a heat storage device, a waste heat exchanger, and off-grid power distribution components. It also includes a fourth waste heat compensation unit on the source side of the air-source heat pump. This fourth unit comprises an air-source heat pump unit connected to the waste heat exchanger via a heat storage circulation pump to form a circulating waste heat compensation unit. This invention utilizes excess, unused heat energy released during the production process, using the waste heat exchanger to heat the air entering the air-source heat pump system. It directly converts solar radiation into electrical energy, with the generated electricity primarily used for system self-consumption, addressing local power supply and demand. Furthermore, it achieves waste heat recovery and utilization by storing various types of waste heat, such as high-temperature flue gas waste heat, cooling medium waste heat, wastewater and waste gas waste heat, chemical reaction waste heat, high-temperature products, and slag, through the heat storage device.

Description

Technical Field

[0001] This invention relates to the field of solar heating technology, and in particular to a solar-powered, frost-free air-source heat pump heating system and its operating method. Background Technology

[0002] Air source heat pumps convert low-grade heat energy (such as the heat contained in the air) that cannot be directly used into high-grade heat energy that can be directly utilized. Air source heat pump heating systems produce almost no greenhouse gas and pollutant emissions during operation. Compared with traditional heating methods, they have significant energy-saving advantages and help improve air quality.

[0003] Air source heat pump heating systems are somewhat dependent on ambient temperature. When the temperature is too low, the system's heating effect is affected, and frosting is prone to occur under certain humidity conditions. Their reliability is poor in cold regions. Heat pumps utilize air as a renewable energy source, supplemented by inexhaustible clean energy—solar energy—allowing for energy complementarity across different weather conditions and time periods, further improving overall energy efficiency.

[0004] Solar photovoltaic thermal technology (PVT) is a comprehensive utilization of solar photovoltaic and solar thermal technologies. Photovoltaic technology uses solar photovoltaic panels to convert solar radiation into electrical energy through a control system. Solar thermal technology converts solar radiation into heat energy through collectors, while simultaneously using a heat cycle to cool the solar photovoltaic panels, improving photoelectric conversion efficiency and maximizing the utilization of solar energy resources. However, solar heating systems are limited by geographical location, weather conditions, and storage technology, resulting in limitations in solar heating.

[0005] Chinese utility model patent CN207455686U, published on June 5, 2018, discloses an air-source heat pump coupled with solar energy for waterless heating, cooling, and hot water supply. This system uses solar energy and an air-source heat pump as heat sources, and waterless underfloor heating as a novel heating method, providing domestic hot water year-round. Specifically, it includes: a solar collector, an evaporator, a compressor, a hot water storage tank, a second water tank, underground coils, water-using equipment, a first heat exchanger, and a second heat exchanger. It utilizes both air and solar energy as dual heat sources and employs an air-source heat pump coupled with solar energy for waterless heating, cooling, and hot water supply.

[0006] Chinese invention patent CN109099614A, published on December 28, 2018, discloses a novel solar-powered frost-free air-source heat pump system, comprising a solar thermal-photovoltaic system, a solution circulation system, and a heat pump system. The solar thermal-photovoltaic system includes an integrated solar thermal-photovoltaic module for converting solar energy into heat and electricity, a controller, a battery for storing electrical energy, and a hot water storage tank for storing thermal energy. The solution circulation system includes a solution tower, a solution pump, a plate heat exchanger, a dilute solution heater, an axial flow fan, and a finned air-cooled heat exchanger. The heat pump circulation system includes a compressor and a four-way reversing valve refrigerant water heater.

[0007] However, neither of the aforementioned patents could recover and utilize the excess, unused heat energy released during the production process. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention proposes a solar-powered, heat-generating, frost-free air-source heat pump heating system and its operating method, which solves the problem that existing solar-coupled air-source heat pump systems fail to recover and utilize excess, unused heat energy released during the production process.

[0009] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A solar-powered, frost-free air-source heat pump heating system includes interconnected solar PV / T modules, an air-source heat pump unit, a heat storage device, a waste heat exchanger, and off-grid power distribution components. It also includes a fourth waste heat compensation unit on the source side of the air-source heat pump. This unit comprises the aforementioned air-source heat pump unit and the waste heat exchanger, with the air-source heat pump unit connected to the waste heat exchanger via a heat storage circulation pump to form a circulating waste heat compensation unit. This invention utilizes excess, unused heat energy released during the production process to achieve waste heat recovery. The waste heat exchanger is used to heat the air entering the air-source heat pump system. This invention directly converts solar radiation energy into electrical energy using the photovoltaic effect of photovoltaic cells. The generated electricity is primarily for system self-use, addressing local power supply and consumption needs. This invention also utilizes the heat storage device to store different types of waste heat, such as high-temperature flue gas waste heat, cooling medium waste heat, wastewater and waste gas waste heat, chemical reaction waste heat, high-temperature products, and slag, to achieve waste heat recovery and utilization.

[0010] Furthermore, it also includes a third solar supplementary heating unit on the source side of the air source heat pump. The third solar supplementary heating unit on the source side of the air source heat pump includes the solar PV / T module and the air source heat pump unit, and the solar PV / T module is connected to the air source heat pump unit through a supplementary heat storage circulation pump to form a circulating solar supplementary heating unit.

[0011] Furthermore, it also includes a source-side heat storage supplementary heating unit five for the air source heat pump, which includes the air source heat pump unit and the heat storage unit, and the air source heat pump unit is connected to the heat storage unit through a supplementary heat storage circulation pump to form a circulating heat storage supplementary heating unit.

[0012] Furthermore, it also includes an air source heat pump user-side heating unit six, which includes the aforementioned air source heat pump unit and heating circulation pump connected in series for supplying heat to the user side.

[0013] Furthermore, it also includes a solar power generation supplementary power unit one and a solar thermal storage unit two. The solar power generation supplementary power unit one includes a solar PV / T module connected in series and an off-grid power distribution module. The off-grid power distribution module is also connected to the supplementary thermal storage circulation pump, the heating circulation pump, and the air source heat pump compressor of the air source heat pump unit for power supply. The solar thermal storage unit two includes the solar PV / T module and the heat storage device, and the solar PV / T module is connected to the heat storage device through the supplementary thermal storage circulation pump to form a circulating thermal storage unit.

[0014] Furthermore, it also includes a user-side combined heat storage heating unit seven for air source heat pumps. The user-side combined heat storage heating unit seven for air source heat pumps includes the heating circulation pump, the air source heat pump unit, and the heat storage unit. The air source heat pump unit is connected in series with the heating circulation pump via line one, and the air source heat pump unit is connected to the user side via line two. The heat storage unit is circulatedly connected to line two via inlet and outlet lines. One of the inlet and outlet lines is connected to line one via a parallel line. The parallel line, the inlet and outlet lines, line one, and line two are respectively equipped with valves X, XI, XII, I, and II to control the parallel or series operation of the air source heat pump unit and the heat storage unit.

[0015] Furthermore, it also includes an air source heat pump user-side heat storage heating unit eight, which includes the aforementioned supplementary heat storage circulation pump and the aforementioned heat storage device. The supplementary heat storage circulation pump is connected in series with the aforementioned heat storage device through the aforementioned parallel line and the aforementioned inlet and outlet lines for releasing the stored heat from the heat storage device to supply heat to the user side.

[0016] Furthermore, it also includes a waste heat storage unit nine, which includes the aforementioned accumulator, supplementary heat storage circulation pump, and waste heat exchanger. The accumulator, supplementary heat storage circulation pump, and waste heat exchanger are connected by a line to form a circulating waste heat storage unit. A valve VIII is provided on the line between the accumulator and the supplementary heat storage circulation pump, and valves III and IX are provided on the line between the supplementary heat storage circulation pump and the waste heat exchanger.

[0017] Furthermore, valve VI is provided on the connection line between the air source heat pump unit and the heat storage unit; valve iii is also provided on the connection line between the supplementary heat storage circulation pump and the heat storage unit; valves II and V are provided on the connection line between the air source heat pump unit and the solar PV / T module; valve I is provided on the connection line between the solar PV / T module and the supplementary heat storage circulation pump; valve IV is provided on the connection line between the supplementary heat storage circulation pump and the air source heat pump unit; and valve VII is provided on the connection line between the supplementary heat storage circulation pump and the waste heat exchanger.

[0018] A method for operating a solar-powered, heat-supplemented, frost-free air source heat pump heating system, comprising any of the above-mentioned solar-powered, heat-supplemented, frost-free air source heat pump heating systems, and further comprising operating method A under solar radiation, heating method B, parallel operation method C, and series operation method D; Working method A during solar radiation includes the following steps: A1. When the system receives solar radiation, by opening valves I, VIII, IX, III, II, X, and XII, the solar thermal storage unit II and the air source heat pump user-side heat storage heating unit VIII will operate. Part of the energy obtained by the solar PV / T modules will be circulated and stored in the heat storage unit through the supplementary heat storage circulation pump, and then used to provide heating to the terminal. A2. By opening valves I, IV, V and II, part of the energy obtained by the solar PV / T module is used for the air preheater. When the outdoor temperature is low or below the set value, the solar supplementary heating unit on the source side of the air source heat pump will operate to supplement the heat to the evaporator side of the air source heat pump. A3. Once the solar power generation supplementary power unit is in operation, a portion of the energy obtained by the solar PV / T module is used for solar photovoltaic power generation; the electricity generated by the photovoltaic panel is converted into AC power by the inverter and supplied to the supplementary heat storage circulation pump, the heating circulation pump and the air source heat pump compressor. Heating method B includes the following steps: opening valves i and ii, the air source heat pump user-side heating unit six operates, the air source heat pump unit circulates through the heating circulation pump and releases heat through the condenser, providing heating to the user side; Parallel operation method C includes the following steps: opening valves X, XII, I, and II, and operating the air source heat pump unit and the heat accumulator in parallel; The series operation method D includes the following steps: opening valves XI, XII and I, and when the outlet water temperature of the air source heat pump unit is less than the temperature of the heat accumulator, the air source heat pump unit and the heat accumulator are operated in series.

[0019] The beneficial effects of this invention are: 1. The solar PV / T module of the present invention converts solar photothermal energy into thermal energy, stores the solar heat for several days or even longer through a heat storage device, and releases it when needed; 2. The energy cycle obtained by the solar PV / T module of the present invention is used to supplement the heat of the air source heat pump and the air preheater, and heat the surrounding air. This can improve the operating conditions of the air source heat pump and reduce the risk of frost formation due to low ambient temperature. 3. The energy stored in the heat storage device of the present invention is circulated through a supplementary heat storage circulation pump to supplement the heat of the air source heat pump and the air preheater; 4. This invention utilizes excess, unused heat energy released during the production process to achieve waste heat recovery, and uses a waste heat heat exchanger to heat the air entering the air source heat pump system. 5. This invention utilizes the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. The generated electricity is mainly used by the system itself, solving the power supply and consumption problem locally. 6. The air source heat pump of the present invention releases usable heat through a condenser, which is then circulated by a circulation pump and supplied to the user side separately. 7. The waste heat storage unit nine of the present invention stores different types of waste heat, such as high-temperature flue gas waste heat, cooling medium waste heat, wastewater and waste gas waste heat, chemical reaction waste heat, high-temperature products and slag, through a heat accumulator, so as to realize the recovery and utilization of waste heat. 8. The heat storage device of this invention can solve the problem caused by the mismatch between heat energy supply and demand in terms of time, space or intensity, and maximize the energy utilization rate of the entire system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of a solar power generation supplement unit of the present invention; Figure 3 This is a schematic diagram of the structure of the second solar thermal storage unit of the present invention; Figure 4 This is a schematic diagram of the structure of the air source heat pump source-side solar heating unit three of the present invention; Figure 5 This is a schematic diagram of the structure of the air source heat pump source-side waste heat replenishment unit four of the present invention; Figure 6 This is a schematic diagram of the structure of the heat supplement unit five of the air source heat pump source-side accumulator of the present invention; Figure 7 This is a schematic diagram of the structure of the air source heat pump user-side heating unit six of the present invention; Figure 8 This is a schematic diagram of the structure of the air source heat pump user-side combined heat storage heating unit seven of the present invention; Figure 9 This is a schematic diagram of the structure of the air source heat pump user-side heat storage heating unit eight of the present invention; Figure 10 This is a schematic diagram of the waste heat storage unit nine of the present invention; Figure 11 This is a schematic diagram of the workflow of the present invention.

[0022] In the diagram: 1. Solar PV / T module; 2. Air source heat pump unit, R1, compressor, R2, condenser, R3, throttling device, R4, evaporator, R5, fan, R6, air preheater; 3. Heat storage unit; 4. Waste heat exchanger; 5. Off-grid power distribution unit, D1, controller, D2, battery, D3, inverter group; B1, supplementary heat storage circulation pump; B2, heating circulation pump; F1, valve I; F2, valve II; F3, valve III; F4, valve IV; F5, valve V; F6, valve VI; F7, valve VII; F8, valve VIII; F9, valve IX; F10, valve X; F11, valve XI; F12, valve XII; F13, valve i; F14, valve ii; F15, valve iii; F16, valve iv. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-10 As shown in Embodiment 1 of the present invention, a solar-powered, heat-supplemented, frost-free air-source heat pump heating system includes a solar PV / T module 1, an air-source heat pump unit 2, a heat storage unit 3, a waste heat exchanger 4, an off-grid power distribution unit 5, a heat storage circulation pump B1, and a heating circulation pump B2 connected to each other. Wherein, as... Figure 1As shown, the air source heat pump unit 2 consists of a compressor R1, a condenser R2, a throttling device R3, an evaporator R4, a fan R5, and an air preheater R6. The off-grid power distribution system consists of a controller D1, a battery D2, and an inverter D3, adhering to the principles of localized adaptation, clean and efficient operation, decentralized layout, and local utilization, to achieve on-site power generation and consumption. The energy obtained by the solar PV / T1 module is circulated through the supplementary heat storage circulation pump B1 to supplement the heat of the air preheater R6 of the air source heat pump unit 2, heating the surrounding air. This improves the operating conditions of the air source heat pump and reduces the risk of frost formation due to low ambient temperatures. The energy stored in the heat storage tank 3 is circulated through the supplementary heat storage circulation pump B1 to supplement the heat of the air preheater R6 of the air source heat pump unit 2. This solar-powered, heat-generating, frost-free air source heat pump heating system can utilize excess, unused heat energy released during the production process to achieve waste heat recovery. The waste heat exchanger 4 is used to heat the air entering the air source heat pump system.

[0025] Furthermore, such as Figure 1 As shown, the air source heat pump unit 2 is connected to the user side via line two. The heat storage unit 3 is circulated and connected to line two via inlet and outlet lines respectively. The solar PV / T module 1 is connected to the supplementary heat storage circulation pump B1 via line three. The supplementary heat storage circulation pump B1 is connected to the heat inlet of the heat storage unit 3 via line five. The heat outlet of the heat storage unit 3 is connected to the solar PV / T module 1 via line four. Valve IF1 is installed on line three, valve VIII F8 is installed on line five, and valves II F2 and IX F9 are installed on line four. The air source heat pump unit 2 is connected to line five via line six, and valve IV F4 is installed on line six. The air source heat pump unit 2 is connected to line four via line seven. Line seven is also connected to the heat inlet of the waste heat exchanger 4 via line eight, and the heat outlet of the waste heat exchanger 4 is connected to line four. Valve V F5 is installed on line seven, and valve VII F7 is installed on line eight. Valve VF5 is located between the junction of line eight and line seven, and between line seven and line four. Valve IXF9 on line four is located between the junction of line seven and line four, and between the heat outlet of waste heat exchanger 4 and line four. Valve IIIF15 is installed on line four, located between the heat outlet of waste heat exchanger 4 and line four, and between line four and the heat accumulator 3. Line eight is also connected to line five via line nine, and line nine is equipped with valve VIF6. Furthermore, line three is connected to line four via line ten, and line ten is equipped with valve IIIF3. Line four is connected to line eight via line eleven. The connection point between line eleven and line eight is located between valve VIIF7 and waste heat exchanger 4, and the connection point between line eleven and line four is close to the heat accumulator 3. Valve IVF16 is installed on line eleven.

[0026] Furthermore, the solar-powered, frost-free air-source heat pump heating system comprises several units, such as... Figure 2 and Figure 3 As shown, the system includes a second solar thermal storage unit, which comprises the aforementioned solar PV / T module 1, a supplementary thermal storage circulation pump B1, and a heat storage unit 3. The solar PV / T module 1 is connected to the heat storage unit 3 via line three, the supplementary thermal storage circulation pump B1, and line five. The heat storage unit 3 is connected to the solar PV / T module 1 via line four, forming a circulating thermal storage unit. The solar PV / T module 1 converts solar thermal energy into heat energy, which is stored in the heat storage unit 3 for several days or even longer, and released when needed.

[0027] For the heat source side of the air source heat pump unit 2, it is divided into five parts: air source heat pump source-side solar heat supplementation unit 3, air source heat pump source-side waste heat supplementation unit 4, and air source heat pump source-side heat storage heat supplementation unit 5. Supplementing heat to the source side of the air source heat pump can effectively alleviate the frosting phenomenon under conditions of low ambient temperature and high relative humidity, increase the source-side temperature, improve the operating conditions of the air source heat pump, and increase the operating efficiency of the air source heat pump unit.

[0028] Furthermore, such as Figure 5 As shown, the solar-powered, frost-free air source heat pump heating system also includes a fourth air source heat pump source-side waste heat supplementation unit, comprising the air source heat pump unit 2, the supplementary heat storage circulation pump B1, and the waste heat exchanger 4. The air source heat pump unit 2 is connected to the outlet end of the waste heat exchanger 4 via line six, the supplementary heat storage circulation pump B1, and line ten. The inlet end of the waste heat exchanger 4 is connected to the air source heat pump unit 2 via line eight, forming a circulating waste heat supplementation unit. Valves IIIF3 and IXF9 are located between the supplementary heat storage circulation pump B1 and the outlet end of the waste heat exchanger 4. This fourth air source heat pump source-side waste heat supplementation unit extracts heat from the waste heat through the waste heat exchanger 4 and circulates it through the supplementary heat storage circulation pump B1 to supplement heat to the source side of the air source heat pump.

[0029] Example 2 differs from Example 1 in that, as Figure 4 As shown, the solar-powered, frost-free air source heat pump heating system also includes a third solar-powered heat supply unit on the source side of the air source heat pump. This third unit comprises the aforementioned solar PV / T module 1, the heat supply and storage circulation pump B1, and the air source heat pump unit 2. The solar PV / T module 1 is connected to the air source heat pump unit 2 via line three, the heat supply and storage circulation pump B1, and line six. The air source heat pump unit 2 is connected to the solar PV / T module 1 via line 7 and part of line four, forming a circulating solar-powered heat supply unit. The heat obtained by the solar PV / T module 1 is circulated through the heat supply and storage circulation pump B1 to supplement the heat supply to the source side of the air source heat pump.

[0030] Example 3 differs from Example 1 in that, as Figure 6 As shown, the solar-powered, frost-free air source heat pump heating system also includes a source-side heat storage unit five, which comprises the air source heat pump unit 2, the heat storage circulation pump B1, and the heat storage unit 3. The air source heat pump unit 2 is connected to the heat inlet of the heat storage unit 3 via partial lines eight, nine, and five. The heat outlet of the heat storage unit is connected to the air source heat pump unit 2 via partial lines four, ten, the heat storage circulation pump B1, and six to form a circulating heat storage unit. The heat stored in the heat storage unit 3 is circulated through the heat storage circulation pump B1 to supplement the heat on the source side of the air source heat pump.

[0031] Example 4 differs from Example 1 in that, as Figure 7 As shown, the solar-powered, frost-free air source heat pump heating system also includes a user-side air source heat pump heating unit six. This unit includes the aforementioned air source heat pump unit 2 and a heating circulation pump B2. The air source heat pump unit 2 is connected in series with the heating circulation pump B2 via line one, and is connected to the user side via line two. Line one is equipped with valve iF13, and line two is equipped with valve iiF14. The air source heat pump unit 2 releases usable heat through the condenser R2, which is then circulated by the heating circulation pump B2 to supply heat to the user side independently.

[0032] Example 5 differs from Example 4 in that, as Figure 8 As shown, the solar-powered, heat-supplemented, frost-free air source heat pump heating system also includes a user-side combined heat storage heating unit seven. This unit includes a heating circulation pump B2, the air source heat pump unit 2, and the heat storage unit 3. The heat storage unit 3 is circulatedly connected to line two via an inlet line and an outlet line. The inlet line is connected to line one via a parallel line, and valve XF10 is installed on the parallel line. Valve XIF11 is installed on the inlet line, and valve XIIF12 is installed on the outlet line. Valve iF13 is installed on line one, and valve iiF14 is installed on line two. Valve iiF14 is located on line two between the junction of the heat storage unit's inlet / outlet lines and line two. Air source heat pump unit 2 and heat storage unit 3 serve as two heat sources, respectively. The opening and closing of valves XF10, XIF11, XIIF12, IF13 and IIF14 control the air source heat pump user-side combined heat storage unit seven to form a parallel or series-parallel circuit of air source heat pump unit 2 and heat storage unit 3, and jointly supply heat to the user side through a combination of parallel and series-parallel connections.

[0033] Example 6 differs from Example 5 in that, as Figure 9 As shown, the solar-powered, frost-free air source heat pump heating system also includes an air source heat pump user-side heat storage unit eight. This unit comprises a supplementary heat storage circulation pump B1 and a heat storage device 3 connected in series. The supplementary heat storage circulation pump B1 is connected to the heat storage device 3 via the parallel line and the inlet line. The heat storage device 3 is connected to the user side via the outlet line. The heat storage device 3 releases the stored heat to supply heat to the user side independently.

[0034] For the user side, there are three heating methods: air source heat pump user side heating unit six, air source heat pump user side combined with heat storage unit seven, and air source heat pump user side heat storage unit eight.

[0035] Example 7 differs from Example 1 in that, as Figure 10 As shown, the solar-powered, heat-supplemented, frost-free air source heat pump heating system also includes a waste heat storage unit nine. This waste heat storage unit nine includes a heat accumulator 3, a heat storage circulation pump B1, and a waste heat exchanger 4. The heat storage circulation pump B1 is connected to the heat inlet of the heat accumulator 3 via line five. The heat outlet of the heat accumulator 3 is connected to the heat inlet of the waste heat exchanger 4 via a portion of line four and line eleven. The heat outlet of the waste heat exchanger 4 is connected to the heat storage circulation pump B1 via a portion of line four and line ten to form a circulating waste heat storage unit. Valve VIII F8 is installed on the line between the heat accumulator 3 and the heat storage circulation pump B1, and valves III F3 and IX F9 are installed on the line between the heat storage circulation pump B1 and the waste heat exchanger 4. This waste heat storage unit nine stores various types of waste heat, such as high-temperature flue gas waste heat, cooling medium waste heat, wastewater and waste gas waste heat, chemical reaction waste heat, high-temperature products, and slag, through heat accumulator 3, thereby achieving the recovery and utilization of waste heat. The presence of heat accumulator 3 can solve the problems caused by the mismatch between heat energy supply and demand in terms of time, space, or intensity, and maximize the energy utilization rate of the entire unit.

[0036] Example 8 differs from Example 1 in that, as Figure 2As shown, the solar-powered, frost-free air-source heat pump heating system also includes a solar power generation and power supply unit 1. This unit comprises a series-connected solar PV / T module 1 and an off-grid power distribution module 5. The off-grid power distribution module 5 is also connected via power transmission lines to the heat storage circulation pump B1, the heating circulation pump B2, and the air-source heat pump compressor R1 of the air-source heat pump unit 2 for power supply. The solar power generation and power supply unit 1 utilizes the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. The generated electricity is primarily for the unit's own use, supplying power to the heat storage circulation pump B1, the heating circulation pump B2, and the air-source heat pump compressor R1, thus solving the power supply and consumption problem locally.

[0037] Example 9: The working method of a solar-powered, frost-free air source heat pump heating system with supplemental power and heat supply, as shown in the flowchart below. Figure 11 As shown in the figure, G represents solar irradiance, with units of W / m². B represents waste heat load, with units of kW. Outdoor temperature Tw = T℃. Outdoor humidity RH = a%.

[0038] The working method of the solar-powered and heat-supplemented frost-free air source heat pump heating system includes four working methods, namely four heating modes. The four working methods are: working method A during solar radiation, heating method B, parallel operation method C of air source heat pump user-side combined heat storage heating unit seven, and series operation method D of air source heat pump user-side combined heat storage heating unit seven.

[0039] Working method A during solar radiation: A1. When the system receives solar radiation, valves IF1, VIII, F8, IX, F9, III, F15, II, F2, X, F10 and XII are opened to operate solar thermal storage unit II and air source heat pump user-side heat storage unit VIII. Part of the energy obtained by solar PV / T module 1 is circulated and stored in heat storage unit 3 through supplementary heat storage circulation pump B1, and indirectly provides heating to the terminal. A2. By opening valves IF1, IVF4, VF5 and IIF2, the solar supplementary heating unit on the source side of the air source heat pump is operated. A portion of the energy obtained by the solar PV / T module 1 is used for the air preheater R6. When the outdoor temperature is low or below the set value, the air source heat pump evaporator side is supplemented with heat to achieve the purpose of no frost on the air source heat pump. A3. A portion of the energy obtained by the solar PV / T module 1 is used for solar photovoltaic power generation, i.e., to operate the solar power supplement unit; the electricity generated by the photovoltaic panel is converted into AC power by the inverter to supply AC loads in the system. The AC loads include the supplementary heat storage circulation pump B1, the heating circulation pump B2, and the air source heat pump compressor R1, achieving zero energy consumption of the system.

[0040] Heating method B: Open valves iF13 and iiF14, and the air source heat pump user-side heating unit six will start operating. The air source heat pump system circulates through the heating circulation pump B2 and then releases usable heat through the condenser R2.

[0041] Parallel operation method C for air source heat pump user-side combined heat storage heating unit seven: Open valves XF10, XIIF12, iF13 and iiF14, and the air source heat pump unit 2 and the heat storage unit 3 of the air source heat pump user-side combined heat storage heating unit 7 will operate in parallel.

[0042] Series operation method D of air source heat pump user-side combined heat storage heating unit seven: Open valves XIF11, XIIF12 and iF13. When the outlet water temperature t2 of air source heat pump unit 2 is less than the temperature t3 of heat storage unit 3, air source heat pump unit 2 and heat storage unit 3 operate in series and meet the user's heating needs through cascade heating.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solar energy power and heat supplementing no-frost air source heat pump heating system, characterized in that, It includes a solar PV / T module (1), an air source heat pump unit (2), a heat storage device (3), a waste heat exchanger (4), and an off-grid power distribution unit (5) connected together. It also includes an air source heat pump source-side waste heat supplementation unit four, which includes the air source heat pump unit (2) and the waste heat exchanger (4). The air source heat pump unit (2) is connected to the waste heat exchanger (4) through a supplementary heat storage circulation pump (B1) to form a circulating waste heat supplementation unit. It also includes a waste heat storage unit nine, which includes the aforementioned heat storage unit (3), a supplementary heat storage circulation pump (B1), and a waste heat exchanger (4). The heat storage unit (3), the supplementary heat storage circulation pump (B1), and the waste heat exchanger (4) are connected by a line to form a circulating waste heat storage unit. A valve VIII (F8) is provided on the line between the heat storage unit (3) and the supplementary heat storage circulation pump (B1), and valves III (F3) and IX (F9) are provided on the line between the supplementary heat storage circulation pump (B1) and the waste heat exchanger (4). By opening valves I (F1), IV (F4), V (F5), and II (F2), part of the energy obtained by the solar PV / T module (1) is used for the air preheater (R6). When the outdoor temperature is low or below the set value, the solar supplementary heating unit three on the source side of the air source heat pump operates to supplement the heat on the evaporator side of the air source heat pump. The energy obtained by the solar PV / T1 module is circulated through the supplementary heat storage circulation pump (B1) to supplement the air preheater (R6) of the air source heat pump unit (2) and heat the surrounding air; the waste heat supplementary heating unit four on the source side of the air source heat pump extracts waste heat through the waste heat exchanger (4) and circulates it to the air preheater (R6) through the supplementary heat storage circulation pump (B1); the heat storage unit nine's heat accumulator (3) can transfer the stored heat to the waste heat exchanger (4) through the supplementary heat storage circulation pump (B1).

2. The solar power-assisted, heat-assisted, no-frost air source heat pump heating system according to claim 1, characterized in that, It also includes an air source heat pump source side solar supplement unit three, which includes the solar PV / T module (1) and the air source heat pump unit (2), and the solar PV / T module (1) is connected to the air source heat pump unit (2) through a supplementary heat storage circulation pump (B1) to form a circulating solar supplement unit.

3. The solar energy power and heat supplementing no-frost air source heat pump heating system according to claim 1 or 2, characterized in that, It also includes a source-side heat storage supplementary heating unit five for air source heat pumps. The source-side heat storage supplementary heating unit five includes the air source heat pump unit (2) and the heat storage unit (3). The air source heat pump unit (2) is connected to the heat storage unit (3) through a supplementary heat storage circulation pump (B1) to form a circulation heat storage supplementary heating unit.

4. The solar power-assisted heat-supplementing and frost-free air source heat pump heating system according to claim 1 or 2, characterized in that, It also includes an air source heat pump user-side heating unit six, which includes the air source heat pump unit (2) and the heating circulation pump (B2) connected in series for supplying heat to the user side.

5. The solar power-assisted, heat-assisted, no-frost air source heat pump heating system according to claim 4, characterized in that, It also includes a solar power generation supplementary power unit one and a solar thermal storage unit two. The solar power generation supplementary power unit one includes a solar PV / T module (1) connected in series and an off-grid power distribution module (5). The off-grid power distribution module (5) is also connected to the supplementary thermal storage circulation pump (B1), the heating circulation pump (B2) and the air source heat pump compressor (R1) of the air source heat pump unit (2) for power supply. The solar thermal storage unit two includes the solar PV / T module (1) and the heat storage device (3). The solar PV / T module (1) is connected to the heat storage device (3) through the supplementary thermal storage circulation pump (B1) to form a circulating thermal storage unit.

6. The solar power-assisted, heat-assisted, no-frost air source heat pump heating system according to claim 4, characterized in that, It also includes a user-side combined heat storage heating unit seven for air source heat pumps. The user-side combined heat storage heating unit seven for air source heat pumps includes a heating circulation pump (B2), the air source heat pump unit (2) and the heat storage unit (3). The air source heat pump unit (2) is connected in series with the heating circulation pump (B2) through line one. The air source heat pump unit (2) is connected to the user side through line two. The heat storage unit (3) is circulatedly connected to line two through inlet and outlet lines. One of the inlet and outlet lines is connected to line one through a parallel line. The parallel line, the inlet and outlet lines, line one and line two are respectively equipped with valves X (F10), XI (F11), XII (F12), I (F13) and II (F14) to control the parallel or series operation of the air source heat pump unit (2) and the heat storage unit (3).

7. The solar-powered, frost-free air-source heat pump heating system according to claim 6, characterized in that, It also includes an air source heat pump user-side heat storage heating unit eight, which includes the supplementary heat storage circulation pump (B1) and the heat storage device (3). The supplementary heat storage circulation pump (B1) is connected in series with the heat storage device (3) through the parallel line and the inlet and outlet lines to release the stored heat to supply heat to the user side.

8. The solar-powered, frost-free air-source heat pump heating system according to claim 1, 2, 5, or 7, characterized in that, The connection line between the air source heat pump unit (2) and the heat storage unit (3) is equipped with valve VI (F6); the connection line between the supplementary heat storage circulation pump (B1) and the heat storage unit (3) is also equipped with valve iii (F15); the connection line between the air source heat pump unit (2) and the solar PV / T module (1) is equipped with valve Ⅱ (F2) and valve Ⅴ (F5); the connection line between the solar PV / T module (1) and the supplementary heat storage circulation pump (B1) is equipped with valve Ⅰ (F1); the connection line between the supplementary heat storage circulation pump (B1) and the air source heat pump unit (2) is equipped with valve Ⅳ (F4); and the connection line between the supplementary heat storage circulation pump (B1) and the waste heat exchanger (4) is equipped with valve Ⅶ (F7).

9. A method for operating a solar-powered, frost-free air-source heat pump heating system, characterized in that, The solar-powered and heat-supplemented, frost-free air-source heat pump heating system as described in any one of claims 1 to 8 further includes a working method A during solar radiation, a heating method B, a parallel operating method C, and a series operating method D; The working method A during solar radiation includes the following steps: A1. When the system receives solar radiation, by opening valves I (F1), VIII (F8), IX (F9), III (F15), II (F2), X (F10), and XII (F12), the solar thermal storage unit II and the air-source heat pump user-side heat storage unit VIII operate. A portion of the energy obtained by the solar PV / T module (1) is circulated and stored in the heat storage unit (3) through the supplementary heat storage circulation pump (B1) to provide heating to the end. A2. By opening valve I (F1), valve IV (F4), valve V (F5) and valve II (F2), part of the energy obtained by the solar PV / T module (1) is used for the air preheater (R6). When the outdoor temperature is low or below the set value, the solar supplementary heating unit on the source side of the air source heat pump will operate to supplement the heat on the evaporator side of the air source heat pump. A3. When the solar power generation supplementary power unit is in operation, a portion of the energy obtained by the solar PV / T module (1) is used for solar photovoltaic power generation; the electricity generated by the photovoltaic panel is converted into AC power by the inverter and supplied to the supplementary heat storage circulation pump (B1), the heating circulation pump (B2) and the air source heat pump compressor (R1); the heating method B includes the following steps: opening valve i (F13) and valve ii (F14), the air source heat pump user-side heating unit six is ​​in operation, the air source heat pump unit (2) circulates through the heating circulation pump (B2) and releases heat through the condenser (R2) to provide heating to the user side; the parallel operation method C includes the following steps: opening valve X (F10), valve XII (F12), valve i (F13) and valve ii (F14), the air source heat pump unit (2) and the heat storage unit (3) are in parallel operation; The series operation method D includes the following steps: open valve XI (F11), valve XII (F12) and valve I (F13). When the outlet water temperature (t2) of the air source heat pump unit (2) is less than the temperature (t3) of the heat accumulator (3), the air source heat pump unit (2) and the heat accumulator (3) are operated in series.

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