Phase change energy storage type PV / T combined supply air source heat pump system

Abstract

The invention relates to the field of phase change energy storage and solar energy utilization, and discloses a phase change energy storage type PV / T combined supply air source heat pump system which comprises an air source heat pump unit, a PV / T combined supply unit, a phase change energy storage unit and a parameter monitoring unit which are circularly connected. The air source heat pump unit and the phase change energy storage unit form large waterway circulation; the PV / T combined supply unit independently forms small waterway circulation, and the small waterway circulation exchanges heat with the large waterway circulation at the outlet of the fan coil through the plate heat exchanger; a battery module of the PV / T combined supply unit is connected with the air source heat pump through an inverter; the parameter monitoring system can collect flow and temperature information and control operation of all assemblies of the whole system. A phase change energy storage technology, a PV / T combined supply technology and an air source heat pump air conditioner are combined, and through efficient energy storage of multi-source cooperation, an intelligent control mode and a modularized system structure, various working modes can be flexibly switched according to external conditions and heat requirements in different seasons, so that the energy-saving and environment-friendly air conditioning system is suitable for large-scale popularization and application. And the energy consumption and the operation cost of the heat pump unit are effectively reduced from the angles of renewable energy utilization and valley electricity and peak electricity utilization.

Description

Technical Field

[0001] The present invention relates to the field of heat pump energy storage and renewable energy utilization, and in particular to a phase change energy storage type PV / T combined air source heat pump air conditioning system. Background Art

[0002] With the continuous growth of global energy demand and the gradual severity of climate problems, reducing energy consumption and developing new energy technologies have become the focus of attention of all countries. The results of energy audits point out that building energy consumption accounts for nearly 40% of global energy consumption, of which air conditioning and heating equipment energy consumption accounts for more than 50% of total building energy consumption. Therefore, it is necessary to consider developing more energy-efficient HVAC technologies to reduce energy consumption and emissions.

[0003] Air source heat pump is a highly energy-efficient HVAC equipment that meets the heating and cooling needs of buildings by absorbing low-grade heat from the air. Compared with traditional coal-fired boiler heating, its COP is doubled, and there is no direct carbon emission during operation, which has significant energy-saving advantages. However, its performance is severely limited by the ambient temperature and it starts slowly. In response to the problems of air source heat pumps, renewable energy utilization technology provides a solution.

[0004] As a typical pollution-free clean energy, the conversion and utilization technology of solar energy photovoltaic (PV) and photothermal (PT) has developed rapidly in recent years. Continuous technical verification has proved that it has great potential in building energy conservation and can be organically combined with air source heat pumps to complement each other's advantages. However, the intermittent and volatile problems in the utilization of photovoltaic and photothermal (PV / T) limit their further promotion and application. In recent years, thanks to the continuous breakthroughs in battery technology, batteries can store unstable power supply and call it smoothly, which has improved the stability of photovoltaic power supply to a certain extent, but the problem of photothermal utilization has not been well solved. Moreover, the existing air source heat pump system mainly relies on direct supply of municipal electricity. When the ambient temperature is not supported, the heat exchange will be greatly attenuated and it cannot operate continuously and efficiently. Summary of the invention

[0005] In view of the problems in the prior art, the present invention aims to provide an air source heat pump air conditioning system which is more energy-saving and environmentally friendly, has lower operating costs and has a wide range of applications.

[0006] A phase-change energy storage type PV / T combined supply air source heat pump air conditioning system, comprising a circularly connected air source heat pump unit, a PV / T combined supply unit, a phase-change energy storage unit and a parameter monitoring unit. The air source heat pump unit forms a large water circuit after passing through the phase-change energy storage unit; the small water circuit where the PV / T combined supply unit is located exchanges heat with the large water circuit at the outlet of the fan coil through a plate heat exchanger; the battery module of the PV / T combined supply unit is connected to the air source heat pump through an inverter; the parameter monitoring system can collect information such as flow, temperature and power consumption and control the operation of each component of the entire system. The PV / T combined supply unit is a combination of solar panels, solar collectors and water circulation pipelines. The electricity generated by the solar panels can be directly powered or stored in batteries; the solar collector is linked with the phase-change energy storage unit to store heat / cold energy in the phase-change energy storage unit; the system realizes the "collection-storage-conversion-supply" link closed loop of renewable energy.

[0007] The air source heat pump unit includes an air source heat pump unit 1-1, a heat pump water tank 1-2, a first fan coil unit 1-5-1, a second fan coil unit 1-5-2, a first valve 1-4-1, a second valve 1-4-2, a third valve 1-4-3, a fourth valve 1-4-4, a fifth valve 1-4-5 and a first water pump 1-3-1, a second water pump 1-3-2; the phase change energy storage unit includes a phase change heat accumulator 3-1-2, a phase change The cold storage device 3-1-1, the first four-way valve (3-3-1), the second four-way valve (3-3-2), the sixth valve 3-2-1, the seventh valve 3-2-2, the eighth valve 3-2-3, the ninth valve 3-2-4, and the tenth valve 3-2-5; the air source heat pump unit 1-1, the heat pump water tank 1-2, the phase change heat storage device 3-1-2, and the phase change cold storage device 3-1-1 are connected through a water circulation pipeline to form a large water circulation.

[0008] Furthermore, the phase change temperature of the phase change material in the phase change cold storage device 3-1-1 is 18-22 degrees Celsius, and the phase change material includes fatty acids, paraffin and hydrated salts; the phase change temperature of the phase change material in the phase change heat storage device 3-1-2 is 35-50 degrees Celsius, and the phase change material includes fatty acids, paraffin and hydrated salts.

[0009] Furthermore, the phase change energy storage unit forms three parallel water paths by controlling the sixth valve 3-2-1, the seventh valve 3-2-2, the eighth valve 3-2-3, the ninth valve 3-2-4, and the tenth valve 3-2-5, and can be switched to three operating modes: no phase change, summer, and winter, by controlling the opening and closing of the valves.

[0010] The first water pump 1-3-1 is arranged on the water circulation pipeline between the air source heat pump unit 1-1 and the heat pump water tank 1-2; the second water pump 1-3-2 is arranged on the mixed water path between the heat pump water tank 1-2 and the phase change energy storage unit; the first valve 1-4-1 is arranged on the mixed water path between the heat pump water tank 1-2 and the phase change energy storage unit, the second valve 1-4-2, the third valve 1-4-3, the fourth valve 1-4-4, and the fifth valve 1-4-5 are arranged on the water pipeline between the first fan coil 1-5-1, the second fan coil 1-5-2 and the plate heat exchanger 2-3; the sixth valve 3-2-1, the seventh valve 3-2-2, the eighth valve 3-2-3, the ninth valve 3-2-4 and the tenth valve 3-2-5 are respectively arranged on the water pipeline connecting the phase change heat storage device 3-1-2 and the phase change cold storage device 3-1-1.

[0011] The PV / T combined supply unit includes a solar panel and a collector 2-1, a water tank 2-2, a plate heat exchanger 2-3, a third water pump 2-4, a battery 2-5 and an inverter 2-6; the collector 2-1 is connected to the water tank 2-2 and the plate heat exchanger 2-3 through a water pipeline; the third water pump 2-4 is arranged on the water pipeline of the collector 2-1 and the plate heat exchanger 2-3; the solar panel is connected to the battery 2-5 and the inverter 2-6 through a circuit, and the system can select three power supply modes: AC power, battery power and hybrid power supply.

[0012] The parameter monitoring unit includes a first temperature sensor 4-2-1, a second temperature sensor 4-2-2, a third temperature sensor 4-2-3, a fourth temperature sensor 4-2-4, a fifth temperature sensor 4-2-5, a sixth temperature sensor 4-2-6, and a seventh temperature sensor 4-2-7; the first to seventh temperature sensors are respectively arranged on the water pipes of the system; the parameter monitoring unit also includes a first flow meter 4-1-1 and a second flow meter 4-1-2, the first flow meter 4-1-1 is arranged on the mixed water path of the heat pump water tank 1-2 and the phase change energy storage unit, and the second flow meter 4-1-2 is arranged on the water path of the collector 2-1 and the plate heat exchanger 2-3; the parameter monitoring unit also includes a first power collector 4-3-1, a second power collector 4-3-2 and a third power collector 4-3-3 arranged on the system circuit.

[0013] Furthermore, the parameter monitoring unit can collect flow, temperature, power consumption, and control the operating parameters of the components through a program. The operating parameters include: heat pump water temperature, water pump speed, valve opening and closing, and fan coil air volume.

[0014] Furthermore, the heat pump water tank (1-2) is provided with a water supply port and a water outlet, and can directly supply hot and cold water for domestic use.

[0015] Beneficial effects of the present invention:

[0016] The phase change energy storage PV / T combined air source heat pump air conditioning system provided by the present invention organically combines air source heat pump technology, PV / T combined supply technology and phase change energy storage technology, and has the following advantages and beneficial effects:

[0017] (1) The closed loop of the “collection-storage-conversion-supply” link of renewable energy is realized. With phase change energy storage technology as a bridge, the advantages of solar energy utilization and air source heat pumps are complemented, reducing the volatility and intermittency of PV / T utilization. The high energy density and stable energy storage capacity of phase change materials and batteries using energy storage technology can convert the fluctuating input of photovoltaic / solar thermal energy into smooth and stable electrical and thermal energy output, enhancing the stability of system operation.

[0018] (2) This technology significantly reduces the operating cost of the system through multi-source coordinated and efficient energy storage. At night when electricity prices are low, a hybrid operation of mains electricity and batteries is used to store heat / cold energy in the phase change energy storage unit. During the day when electricity prices are high, part of the electricity generated by the PV modules is stored in the battery, and part is used to power the system; the heat / cold energy stored in the phase change energy storage unit and the heat energy generated by the PT modules are supplied to the air conditioning system to assist operation.

[0019] (3) Intelligent control methods and modular system structure can flexibly configure different modules to meet diverse cooling and heating load requirements, while also reducing the cost of subsequent maintenance.

[0020] (4) Air source heat pumps work together with PV / T cogeneration and energy storage technology to reduce carbon emissions and energy waste. As an environmentally friendly HVAC equipment, air source heat pumps have broadened their application scope with the assistance of PV / T cogeneration, and are also more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the system structure of a phase change energy storage PV / T combined air source heat pump air conditioning system.

[0022] Figure 2 This is a control logic diagram of a phase change energy storage PV / T combined air source heat pump air conditioning system.

[0023] Reference numerals:

[0024] 1-1 air source heat pump unit; 1-2 heat pump water tank; 1-3-1 first water pump; 1-3-2 second water pump;

[0025] 2-4 the third water pump; 2-1 collector; 2-2 water tank; 2-3 plate heat exchanger; 2-5 battery;

[0026] 2-6 inverter; 1-5-1 first fan coil unit; 1-5-2 second fan coil unit;

[0027] 1-4-1 the first valve; 1-4-2 the second valve; 1-4-3 the third valve; 1-4-4 the fourth valve; 1-4-5 the fifth valve; 3-2-1 the sixth valve; 3-2-2 the seventh valve; 3-2-3 the eighth valve; 3-2-4 the ninth valve;

[0028] 3-2-5 tenth valve;

[0029] 3-1-2 phase change heat storage device; 3-1-1 phase change cold storage device;

[0030] 3-3-1 first four-way valve; 3-3-2 second four-way valve;

[0031] 4-2-1 first temperature sensor; 4-2-2 second temperature sensor; 4-2-3 third temperature sensor;

[0032] 4-2-4 fourth temperature sensor; 4-2-5 fifth temperature sensor; 4-2-6 sixth temperature sensor;

[0033] 4-2-7 seventh temperature sensor;

[0034] 4-1-1 first flow meter; 4-1-2 second flow meter;

[0035] 4-3-1 first electricity collector; 4-3-2 second electricity collector; 4-3-3 third electricity collector. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application. The scope of protection required by the present invention is defined by the attached claims and their equivalents.

[0037] Before describing the embodiments of the present invention in detail, the entire application scenario is described first. The control method, control device, electronic device and computer-readable storage medium of the phase change energy storage PV / T combined air source heat pump air conditioning system of the embodiments of the present invention can be applied to the air conditioning system locally, to the cloud platform in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. Among them, third-party devices may include mobile phones, tablet computers, notebooks, car computers and other smart terminals and other different types.

[0038] Example

[0039] like Figure 1 As shown, an embodiment of the present application provides a phase-change energy storage type PV / T combined supply air source heat pump air conditioning system, including a circularly connected air source heat pump unit, a PV / T combined supply unit, a phase-change energy storage unit and a parameter monitoring unit, as well as pipes and circuits connecting the units. Specifically, the air source heat pump unit forms a large water circuit circulation after the phase-change energy storage unit, and the small water circuit circulation where the PV / T combined supply unit is located exchanges heat with the large water circuit circulation at the fan coil outlet through a plate heat exchanger. The battery module of the PV / T combined supply unit is connected to each electrical device in the system through an inverter. The parameter monitoring system can collect information such as flow, temperature, power consumption, etc. and control the operation of each component of the entire system.

[0040] The air source heat pump unit includes an air source heat pump unit 1-1, a heat pump water tank 1-2, a first fan coil unit 1-5-1, a second fan coil unit 1-5-2, a first valve 1-4-1, a second valve 1-4-2, a third valve 1-4-3, a fourth valve 1-4-4, a fifth valve 1-4-5 and a first water pump 1-3-1, a second water pump 1-3-2; the phase change energy storage unit includes a phase change heat accumulator 3-1-2, a phase change The cold storage device 3-1-1, the first four-way valve (3-3-1), the second four-way valve (3-3-2), the sixth valve 3-2-1, the seventh valve 3-2-2, the eighth valve 3-2-3, the ninth valve 3-2-4, and the tenth valve 3-2-5; the air source heat pump unit 1-1, the heat pump water tank 1-2, the phase change heat storage device 3-1-2, and the phase change cold storage device 3-1-1 are connected through a water circulation pipeline to form a large water circulation.

[0041] The phase change energy storage unit forms three parallel water paths by controlling the sixth valve 3-2-1, the seventh valve 3-2-2, the eighth valve 3-2-3, the ninth valve 3-2-4, and the tenth valve 3-2-5, and can be switched to three operating modes: no phase change, summer, and winter, by controlling the opening and closing of the valves.

[0042] The first water pump 1-3-1 is arranged on the water circulation pipeline between the air source heat pump unit 1-1 and the heat pump water tank 1-2; the second water pump 1-3-2 is arranged on the mixed water path between the heat pump water tank 1-2 and the phase change energy storage unit; the first valve 1-4-1 is arranged on the mixed water path between the heat pump water tank 1-2 and the phase change energy storage unit, the second valve 1-4-2 is arranged on the water path between the first fan coil 1-5-1 and the plate heat exchanger 2-3, the third valve 1-4-3 is arranged on the water path between the second fan coil 1-5-2 and the plate heat exchanger 2-3; the fourth valve 1-4-4 is arranged on the plate heat exchanger 2-3 and the first fan coil 1-5-1 and the second fan In the mixed water path of the machine coil 1-5-2, the fifth valve 1-4-5 is arranged on the water path pipeline between the plate heat exchanger 2-3 and the heat pump water tank 1-2; the sixth valve 3-2-1 is arranged on the water path of the phase change cold storage 3-1-1 and the first four-way 3-3-1, the seventh valve 3-2-2 is arranged on the water path of the phase change heat storage 3-1-2 and the first four-way, the eighth valve 3-2-3 is arranged on the water path of the phase change cold storage 3-1-1 and the second four-way 3-3-2, the ninth valve 3-2-4 is arranged on the water path of the phase change heat storage 3-1-2 and the second four-way, and the tenth valve 3-2-5 is arranged on the water paths of the first four-way and the second four-way respectively.

[0043] The PV / T combined supply unit includes a solar panel and a collector 2-1, a water tank 2-2, a plate heat exchanger 2-3, a third water pump 2-4, a battery 2-5 and an inverter 2-6; the collector 2-1 is connected to the water tank 2-2 and the plate heat exchanger 2-3 through a water pipeline; the third water pump 2-4 is arranged on the water pipeline of the collector 2-1 and the plate heat exchanger 2-3; the solar panel is connected to the battery 2-5 and the inverter 2-6 through a circuit, and the system can select three power supply modes: AC power, battery power and hybrid power supply.

[0044] The parameter monitoring unit includes a first temperature sensor 4-2-1, a second temperature sensor 4-2-2, a third temperature sensor 4-2-3, a fourth temperature sensor 4-2-4, a fifth temperature sensor 4-2-5, a sixth temperature sensor 4-2-6, and a seventh temperature sensor 4-2-7; the first to seventh temperature sensors are distributed on the water pipes of the system; the parameter monitoring unit also includes a first flow meter 4-1-1 and a second flow meter 4-1-2, the first flow meter 4-1-1 is arranged on the mixed water path of the heat pump water tank 1-2 and the phase change energy storage unit, and the second flow meter 4-1-2 is arranged on the water path of the collector 2-1 and the plate heat exchanger 2-3; the parameter monitoring unit also includes a first power collector 4-3-1, a second power collector 4-3-2 and a third power collector 4-3-3 arranged on the system circuit.

[0045] The parameter monitoring unit can collect flow, temperature, and power consumption, and control the operating parameters of the components through programs. The operating parameters include: heat pump water temperature, water pump speed, valve opening and closing, and fan coil air output.

[0046] The heat pump water tank 1-2 has a water supply port and a water outlet, which can directly supply hot and cold water for domestic use.

[0047] Specifically, the rated heating capacity of the air source heat pump in this embodiment is 10kW, the rated power is 2.5kW, the rated water outlet temperature is 55°C, and the supporting heat pump water tank capacity is 100L.

[0048] Specifically, the phase change material in the phase change heat storage device in this embodiment is lauric acid, whose phase change temperature is 48°C and phase change enthalpy is 175 J / g; the phase change material in the phase change cold storage device is paraffin, whose phase change temperature is 20°C and phase change enthalpy is 210 J / g. Both the phase change heat storage device and the phase change cold storage device are covered with 6 cm thick insulation cotton to reduce heat loss.

[0049] Specifically, the PV / T device in this embodiment is a device that combines a solar panel, a solar thermal collector and a water circulation pipeline, and has the functions of photovoltaic power generation and light heat recovery.

[0050] like Figure 2 As shown, the parameter monitoring unit in this embodiment can collect information such as flow, temperature, and power consumption, and control operating parameters such as heat pump water temperature, water pump speed, and fan coil air volume through programs. It can also switch the operating mode by controlling the opening and closing of valves and equipment. After considering whether the light is sufficient and the cooling / heating demand, the operating modes can be divided into the following six types:

[0051] (I) PV / T combined heat storage / release mode: In winter when the sun is sufficient, the PV / T combined heat unit is activated, the seventh valve 3-2-2, the ninth valve 3-2-4, and the fourth valve 1-4-4 are opened, and the sixth valve 3-2-1, the eighth valve 3-2-3, the tenth valve 3-2-5, and the fifth valve 1-4-5 are closed.

[0052] Photovoltaic power is stored in the battery 2-5 and then drives the air source heat pump unit 1-1 for heating and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 to circulate, so that the large water circuit circulates through the plate heat exchanger 2-3 and the small water circuit for heat exchange, and the light heat enters the large circulation. The large circulation water flows through the phase change heat accumulator 3-1-2. If the water temperature is lower than the phase change temperature at this time, the heat accumulator releases heat into the large circulation, shortening the start-up time of the heat pump; if the water temperature is higher than the phase change temperature at this time, the heat accumulator stores heat, and the excess heat energy is stored in the heat accumulator and waits for use. When the large circulation water flows through the fan coils 1-5-1 and 1-5-2, the heated air is sent into the room.

[0053] (ii) Hybrid heat storage / release mode: In winter when sunlight is insufficient, the PV / T combined power supply unit is activated and connected to the mains supply.

[0054] Open the seventh valve 3-2-2, the ninth valve 3-2-4, the fourth valve 1-4-4, and close the sixth valve 3-2-1,

[0055] The eighth valve 3-2-3, the tenth valve 3-2-5, and the fifth valve 1-4-5. Photovoltaic power is stored in the storage battery 2-5 and then used in conjunction with the city electricity to drive the air source heat pump unit 1-1 for heating and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 to circulate, so that the large water circuit circulates through the plate heat exchanger 2-3 and the small water circuit for heat exchange, and the light heat enters the large circulation. The large circulation water circuit flows through the phase change heat accumulator 3-1-2. If the water temperature is lower than the phase change temperature at this time, the heat accumulator releases heat and enters the large circulation, shortening the start-up time of the heat pump; if the water temperature is higher than the phase change temperature at this time, the heat accumulator stores heat, and the excess heat energy is stored in the heat accumulator and waits for call. When the large circulation water circuit flows through the first fan coil 1-5-1 and the second fan coil 1-5-2, the heated air is sent into the room.

[0056] (III) Mains direct supply heat storage / release mode: In winter when there is no sunlight, connect the mains supply, open the seventh valve 3-2-2, the ninth valve 3-2-4, and the fifth valve 1-4-5, and close the sixth valve 3-2-1, the eighth valve 3-2-3, the tenth valve 3-2-5, and the fourth valve 1-4-4. The mains direct supply drives the air source heat pump unit 1-1 to heat and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 to circulate. The large circulation water flows through the phase change heat accumulator 3-1-2. If the water temperature is lower than the phase change temperature at this time, the heat accumulator releases heat into the large circulation, shortening the start-up time of the heat pump; if the water temperature is higher than the phase change temperature at this time, the heat accumulator stores heat, and the excess heat energy is stored in the heat accumulator for use. When the large circulation water flows through the first fan coil 1-5-1 and the first fan coil 1-5-2, the heated air is sent into the room.

[0057] (IV) PV / T combined supply cold storage / release mode: In the summer with sufficient sunlight, the PV / T combined supply unit is enabled, the sixth valve 3-2-1, the eighth valve 3-2-3, and the fourth valve 1-4-4 are opened, and the seventh valve 3-2-2, the ninth valve 3-2-4, the tenth valve 3-2-5, and the fifth valve 1-4-5 are closed. Photovoltaic power is stored in the storage battery 2-5 and then drives the air source heat pump unit 1-1 for refrigeration and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 for circulation, so that the large water circuit circulates through the plate heat exchanger 2-3 and the small water circuit for heat exchange, and the cold can cool the high-temperature solar panels. The large circulation water circuit flows through the phase change cold storage 3-1-1. If the water temperature is higher than the phase change temperature at this time, the cold storage releases cold into the large circulation, shortening the start-up time of the heat pump; if the water temperature is lower than the phase change temperature at this time, the cold storage stores cold, and the excess cold energy is stored in the cold storage for call. The cooled air from the first fan coil unit 1-5-1 and the first fan coil unit 1-5-2 is delivered to the room.

[0058] (V) Hybrid cooling / releasing mode: In the summer when sunlight is insufficient, the PV / T combined power supply unit is activated and connected to the mains supply.

[0059] Open the sixth valve 3-2-1, the eighth valve 3-2-3, the fourth valve 1-4-4, and close the seventh valve 3-2-2,

[0060] The ninth valve 3-2-4, the tenth valve 3-2-5, the fifth valve 1-4-5). Photovoltaic power is stored in the storage battery 2-5 and then drives the air source heat pump unit 1-1 for refrigeration and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 for circulation, so that the large water circuit circulates through the plate heat exchanger 2-3 and the small water circuit for heat exchange, and the cold can cool the high-temperature solar panels. The large circulation water flows through the phase change cold storage 3-1-1. If the water temperature is higher than the phase change temperature at this time, the cold storage releases cold into the large circulation, shortening the start-up time of the heat pump; if the water temperature is lower than the phase change temperature at this time, the cold storage stores cold, and the excess cold energy is stored in the cold storage for use. When the large circulation water flows through the first fan coil 1-5-1 and the first fan coil 1-5-2, the cooled air is sent into the room.

[0061] (VI) Mains direct supply cooling / releasing mode: In the summer when there is no sunlight, connect the mains supply and open valve 6.

[0062] 3-2-1, the eighth valve 3-2-3, the fifth valve 1-4-5), close the seventh valve 3-2-2, the ninth valve 3-2-4,

[0063] The tenth valve 3-2-5, the fourth valve 1-4-4). The mains power directly drives the air source heat pump unit 1-1 for refrigeration and the first water pump 1-3-1, the second water pump 1-3-2 and the third water pump 2-4 for circulation. The large circulation water flows through the phase change cold storage device 3-1-1. If the water temperature is higher than the phase change temperature at this time, the cold storage device releases cold into the large circulation, shortening the start-up time of the heat pump; if the water temperature is lower than the phase change temperature at this time, the cold storage device stores cold, and the excess cold energy is stored in the cold storage device for use. The large circulation first fan coil unit 1-5-1, the first fan coil unit 1-5-2, the cooled air is sent into the room.

[0064] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the", "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0065] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0066] It should be understood that although the terms A-1-1, A-1-2, A-1, etc. may be used to describe components in the embodiments of the present invention, these components should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of the embodiments of the present invention, A-1-1 may also be referred to as A-1-2, and similarly A-2-2 may also be referred to as A-2-3.

[0067] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0068] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical factors in the commodity or device comprising the elements.

Claims

1. A phase change energy storage PV / T combined air source heat pump system, characterized in that: The system includes an air source heat pump unit, a PV / T combined supply unit, a phase change energy storage unit and a parameter monitoring unit; the air source heat pump unit and the phase change energy storage unit are connected in series through pipelines to form a large water circuit circulation; the PV / T combined supply unit is an independent small water circuit circulation; the independent small water circuit circulation exchanges heat with the large water circuit circulation return water circuit through the plate heat exchanger and the fan coil outlet; the PV / T combined supply unit is a combination of solar panels, solar collectors and water circulation pipelines, and the electric energy generated by the solar panels can be directly powered or stored in batteries; the solar collectors are linked with the phase change energy storage unit to store heat / cold energy in the phase change energy storage unit; the system realizes the "collection-storage-conversion-supply" link closed loop of renewable energy.

2. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The air source heat pump unit comprises an air source heat pump unit (1-1), a heat pump water tank (1-2), a first fan coil unit (1-5-1), a second fan coil unit (1-5-2), a first valve (1-4-1), a second valve (1-4-2), a third valve (1-4-3), a fourth valve (1-4-4), a fifth valve (1-4-5) and a first water pump (1-3-1), a second water pump (1-3-2); the phase change energy storage unit comprises a phase change heat accumulator (3-1-2) , phase change cold storage device (3-1-1), a first four-way valve (3-3-1), a second four-way valve (3-3-2), a sixth valve (3-2-1), a seventh valve (3-2-2), an eighth valve (3-2-3), a ninth valve (3-2-4), and a tenth valve (3-2-5); the air source heat pump unit (1-1), the heat pump water tank (1-2), the phase change heat storage device (3-1-2), and the phase change cold storage device (3-1-1) are connected through a water circulation pipeline to form a large water circulation.

3. A phase change energy storage PV / T combined air source heat pump system according to claim 2, characterized in that: The first water pump (1-3-1) is arranged on a water circulation pipeline between the air source heat pump unit (1-1) and the heat pump water tank (1-2); the second water pump (1-3-2) is arranged on a mixed water path between the heat pump water tank (1-2) and the phase change energy storage unit; the first valve (1-4-1) is arranged on a mixed water path between the heat pump water tank (1-2) and the phase change energy storage unit, and the second valve (1-4-2), the third valve (1-4-3), and the fourth valve (1-4-4 ), the fifth valve (1-4-5) is arranged on the water pipeline between the first fan coil unit (1-5-1), the second fan coil unit (1-5-2) and the plate heat exchanger (2-3); the sixth valve (3-2-1), the seventh valve (3-2-2), the eighth valve (3-2-3), the ninth valve (3-2-4) and the tenth valve (3-2-5) are respectively arranged on the water pipeline connecting the phase change heat storage device (3-1-2) and the phase change cold storage device (3-1-1).

4. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The PV / T combined power supply unit comprises a solar panel and a heat collector (2-1), a water tank (2-2), a plate heat exchanger (2-3), a third water pump (2-4), a storage battery (2-5) and an inverter (2-6); the heat collector (2-1) is connected to the water tank (2-2) and the plate heat exchanger (2-3) via a water pipeline; the third water pump (2-4) is arranged on the water pipeline between the heat collector (2-1) and the plate heat exchanger (2-3); and the solar panel is connected to the storage battery (2-5) and the inverter (2-6) via a circuit.

5. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The parameter monitoring unit comprises a first temperature sensor (4-2-1), a second temperature sensor (4-2-2), a third temperature sensor (4-2-3), a fourth temperature sensor (4-2-4), a fifth temperature sensor (4-2-5), a sixth temperature sensor (4-2-6), and a seventh temperature sensor (4-2-7); the first to seventh temperature sensors are respectively arranged on the water pipeline of the system; the parameter monitoring unit also comprises a first flow meter (4-1-1) and a second flow meter (4-1-2); the first flow meter (4-1-1) is arranged on the mixed water path of the heat pump water tank (1-2) and the phase change energy storage unit, and the second flow meter (4-1-2) is arranged on the water path of the plate heat exchanger (2-3) of the collector (2-1); the parameter monitoring unit also comprises a first power collector (4-3-1), a second power collector (4-3-2), and a third power collector (4-3-3) arranged on the system circuit.

6. A phase change energy storage PV / T combined air source heat pump system according to claim 3, characterized in that: The phase change energy storage unit has three parallel water paths, which can be switched to three operating modes: no phase change, summer and winter by controlling the opening and closing of valves.

7. A phase change energy storage PV / T combined air source heat pump system according to claim 5, characterized in that: The parameter monitoring unit can collect flow, temperature, and power consumption, and control the operating parameters of the components through a program. The operating parameters include: heat pump water temperature, water pump speed, valve opening and closing, and fan coil air volume.

8. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The system can select three power supply modes: mains power supply, battery power supply and hybrid power supply.

9. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The phase change temperature of the phase change material in the phase change cold storage device (3-1-1) is 18-22 degrees Celsius, and the phase change material includes fatty acids, paraffin wax, and hydrated salts; the phase change temperature of the phase change material in the phase change heat storage device (3-1-2) is 35-50 degrees Celsius, and the phase change material includes fatty acids, paraffin wax, and hydrated salts.

10. A phase change energy storage PV / T combined air source heat pump system according to claim 1, characterized in that: The water tank (1-2) is provided with a water supply port and a water outlet, and can directly supply hot and cold water for domestic use.

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