Novel PVT-air source double-source frosting-free heat pump system and working method thereof

Abstract

The invention discloses a novel PVT-air source double-source frosting-free heat pump system and a working method thereof.The novel PVT-air source double-source frosting-free heat pump system is characterized in that three channel loops which are arranged in parallel are arranged on the evaporation side of a water source heat pump assembly, and the three channel loops are the first circulation loop, the second circulation loop and the third circulation loop correspondingly; the first circulation loop is connected with the PVT assembly to form a PVT assembly water circulation loop; the second circulation loop is connected with the air-anti-freezing solution heat exchanger to form an air-anti-freezing solution heat exchanger water circulation loop; the third circulation loop is connected with the ice storage box to form an ice storage box water circulation loop; the condensation side of the water source heat pump assembly is connected with the plate heat exchanger to form a fourth circulation loop; the three circulation loops are switched and controlled through an electric three-way valve; the energy storage water tank and the plate heat exchanger are connected through a pipeline to form a fifth circulation loop; the plate heat exchanger and the air conditioner terminal are connected through a pipeline to form a sixth circulation loop.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat pumps, and particularly relates to a novel PVT-air source dual-source frost-free heat pump system and a working method thereof. BACKGROUND

[0002] With the rapid development of society, energy consumption is growing explosively. Building operation energy consumption accounts for one-third of the total social energy consumption, and is one of the main sources of carbon emissions. High peak air conditioning load also has a great impact on the power grid. New energy technology is the main way to solve the problems of energy shortage and environmental pollution caused by high energy consumption. Solar energy and air energy are renewable energy that has gradually emerged in recent years. Because of their environmental friendliness, renewability and universality, they play an important role in the use of new energy in buildings. With the expansion of their use range, their shortcomings have gradually emerged. For example, the increase of the temperature of the battery panel will reduce the photoelectric efficiency, the use stability of solar energy is limited, and the air source heat pump has the problem of frosting, which seriously affects the operation effect. SUMMARY

[0003] In order to solve the above problems, the application provides a novel PVT-air source dual-source frost-free heat pump system and a working method thereof, which adopts the following technical scheme:

[0004] A novel PVT-air source dual-source frost-free heat pump system, the evaporator of the heat pump system in the heating mode is an ice storage tank, the evaporation heat is the phase change latent heat of water changing into ice in the ice storage tank, and the heat of ice changing into water is provided by a PVT assembly and air energy;

[0005] The heat pump system comprises a PVT assembly, an ice storage tank, an air-antifreeze liquid heat exchanger, a water source heat pump assembly, a plate heat exchanger, an energy storage water tank and an air conditioning terminal;

[0006] The evaporation side of the water source heat pump assembly is provided with three channel circuits arranged in parallel, and the three channel circuits are respectively a first circulation circuit, a second circulation circuit and a third circulation circuit; the first circulation circuit is connected with the PVT assembly to form a PVT assembly water circulation circuit; the second circulation circuit is connected with the air-antifreeze liquid heat exchanger to form an air-antifreeze liquid heat exchanger water circulation circuit; the third circulation circuit is connected with the ice storage tank to form an ice storage tank water circulation circuit; and the condensation side of the water source heat pump assembly is connected with the plate heat exchanger to form a fourth circulation circuit;

[0007] Among them, the switching control among the three circulation circuits is realized through an electric three-way valve, and an electromagnetic valve and a water pump are connected on each circulation circuit;

[0008] The energy storage water tank and the plate heat exchanger are connected by pipelines to form a fifth circulating loop; the plate heat exchanger and the air conditioner terminal are connected by pipelines to form a sixth circulating loop; and the energy storage water tank and the air conditioner terminal are connected by pipelines to form a seventh circulating loop.

[0009] Further, the heat collecting unit in the PVT assembly adopts a flat plate heat pipe structure, and heat collected by the heat collecting unit can be stored in the ice storage tank or directly used as a low-temperature heat source of the water source heat pump assembly through a water pump operating a heat collecting cycle.

[0010] Further, the PVT assembly adopts a single-crystal silicon cell panel or a multi-crystal silicon cell panel, and a photovoltaic power generation unit of the PVT assembly is connected to a building power distribution system through an inverter.

[0011] Further, the ice storage tank adopts an indirect heat exchange structure, and a heat exchanger of the ice storage tank adopts a multi-channel flat tube structure; a main body of the heat exchanger of the ice storage tank is a flat channel extruded from metal, and the flat channel has multiple square channels arranged side by side inside, and fins are arranged on the outside of the flat tube.

[0012] Further, the air-antifreeze liquid heat exchanger adopts a finned tube structure, and heat exchange circulation is operated by a water pump, the air-antifreeze liquid heat exchanger is used as a low-temperature heat source of the ice storage tank or the water source heat pump assembly in a heating mode, and the air-antifreeze liquid heat exchanger is used as a cold source of the water source heat pump assembly in a cooling mode.

[0013] Further, in the cooling mode, the water source heat pump assembly uses the air-antifreeze liquid heat exchanger as a cold source, and stores cold through the ice storage tank or the energy storage water tank.

[0014] In the heating mode, the latent heat of condensation of water in the PVT assembly, the air-antifreeze liquid heat exchanger, and the ice storage tank can be used as a low-temperature heat source of the water source heat pump assembly, and heat is stored through the energy storage water tank; in the daytime, the ice storage tank is melted by using solar energy or air energy to restore energy for continuous and stable operation while heating, the PVT assembly collects heat and generates electricity at the same time to meet the building electricity demand.

[0015] Further, the plate heat exchanger is formed by welding stainless steel corrugated sheets, and high-efficiency flow channel structures are formed between adjacent corrugated sheets.

[0016] Further, the energy storage water tank adopts an open direct heat exchange water tank, and the energy storage working medium is water.

[0017] Further, the air conditioner terminal adopts a fan coil.

[0018] Further, a working method of the new PVT-air source dual-source frost-free heat pump system, the working method of the new PVT-air source dual-source frost-free heat pump system according to any one of the preceding, comprises the following steps:

[0019] Heating mode:

[0020] S1, the water source heat pump assembly is used as a main cold and heat source to undertake equipment, and the heat source in the heating mode is respectively solar energy, air energy and latent heat of water in the ice storage tank;

[0021] S11, if the heat source in the heating mode is solar energy as a low-temperature heat source, the fluid flows out from the water source heat pump assembly, passes through the PVT assembly, and then returns to the evaporator of the water source heat pump assembly;

[0022] S12, if the heat source in the heating mode is air energy as a low-temperature heat source, the fluid flows out from the water source heat pump assembly, passes through the air-antifreeze liquid heat exchanger, and then returns to the evaporator of the water source heat pump assembly;

[0023] S13, if the heat source in the heating mode is the ice storage tank as a low-temperature heat source, the fluid flows out from the water source heat pump assembly, passes through the ice storage tank, and then returns to the evaporator of the water source heat pump assembly; the fluid on the condensing side of the water source heat pump assembly passes through the plate heat exchanger, and then returns to the condenser of the water source heat pump assembly;

[0024] S2, the user side has a heat pump direct supply mode, an ice storage tank heat storage mode and an ice storage tank heat supply mode according to the heat use condition of the user and the heat storage condition of the ice storage tank;

[0025] S21, the heat pump direct supply mode: the fluid passes through the air conditioning terminal, and then returns to the plate heat exchanger;

[0026] S22, the ice storage tank heat storage mode: the fluid flows out from the plate heat exchanger, passes through the ice storage tank, and then returns to the plate heat exchanger;

[0027] S23, the ice storage tank heat supply mode: the fluid flows out from the ice storage tank, passes through the air conditioning terminal, and then returns to the ice storage tank;

[0028] Cooling mode:

[0029] S1, the heat source of the water source heat pump assembly in the cooling mode is air energy, the fluid flows out from the water source heat pump assembly, passes through the air-antifreeze liquid heat exchanger, and then returns to the condenser of the water source heat pump assembly;

[0030] S2, the user side has a heat pump direct supply mode, an ice storage tank heat storage mode, an ice storage tank heat supply mode, an ice storage tank heat storage mode and an ice storage tank heat supply mode according to the heat use condition of the user and the heat storage condition;

[0031] S21, heat pump direct supply mode: the fluid flows out from the plate heat exchanger and returns to the plate heat exchanger through the air conditioner terminal; the fluid of the water source heat pump assembly evaporation side returns to the evaporator of the water source heat pump assembly through the plate heat exchanger;

[0032] S22, energy storage water tank cold storage mode: the fluid flows out from the plate heat exchanger and returns to the plate heat exchanger through the energy storage water tank; the fluid of the water source heat pump assembly evaporation side returns to the evaporator of the water source heat pump assembly through the plate heat exchanger;

[0033] S23, energy storage water tank cooling supply mode: the fluid flows out from the energy storage water tank and returns to the energy storage water tank through the air conditioner terminal;

[0034] S24, ice storage tank cold storage mode: the fluid flows out from the water source heat pump assembly and returns to the evaporator of the water source heat pump assembly through the ice storage tank;

[0035] S25, ice storage tank cooling supply mode: the fluid flows out from the plate heat exchanger and returns to the plate heat exchanger through the ice storage tank; the user side fluid returns to the plate heat exchanger through the air conditioner terminal.

[0036] Beneficial effects:

[0037] The novel PVT-air source dual-source frost-free heat pump system and the working method thereof have the following beneficial effects:

[0038] (1) Efficient energy comprehensive utilization: the application innovatively combines photovoltaic-thermal technology, air source heat pump technology and phase change energy storage technology, realizes efficient collaborative utilization of multiple energy sources; the PVT component efficiently collects solar heat energy while generating electricity; the air-antifreeze heat exchanger provides suitable heat source or cold source for the system according to seasonal conditions; the ice storage tank and the energy storage water tank cooperatively complete energy storage and regulation of the system, greatly reduces energy waste and significantly improves the energy comprehensive utilization efficiency of the system.

[0039] (2) High operation stability: the application of phase change energy storage technology enables the system to effectively cope with the energy output fluctuation problem of solar energy caused by natural condition changes; in the heating mode, the ice storage tank serves as a stable low-temperature heat source, ensuring that the heat pump evaporator maintains a high temperature and maintains the stability of the system heat supply; in the cooling mode, the cold storage function ensures the continuity of the system cooling, greatly improves the stability and reliability of the system operation, ensures the stability of building energy supply, and effectively reduces the adverse effects of unstable energy supply on building normal operation.

[0040] (3) Ensure that the air energy heating system does not frost: the traditional air energy heat pump system when heating, when the ambient temperature is low, the evaporator is easy to frost, after frosting, the heating efficiency is reduced, when the frost layer reaches a certain thickness, not only needs to stop heating, but also needs to consume additional energy to defrost, which is the biggest technical bottleneck of the traditional air energy heat pump system. The air energy heating system of the present application, because the air-antifreeze heat exchanger absorbs air energy, the temperature of the air side must be higher than the freezing point temperature to melt the ice in the ice storage box to store heat, so the air-antifreeze heat exchanger never frosts, especially suitable for areas with high humidity.

[0041] (4) Significant environmental and energy-saving benefits: the system uses solar energy, air energy and other renewable clean energy as the main energy input, significantly reducing the dependence on traditional fossil energy, in line with the global green low-carbon development trend, and has important significance for promoting energy conservation and sustainable development in the building field, and helps buildings to achieve green star standards.

[0042] (5) System flexibility: through the intelligent switching control of the electric three-way valve on the multi-channel circuit of the water source heat pump assembly, the system can flexibly and efficiently adjust the operation mode according to different seasons, different environmental conditions and actual load demand of the building; whether it is extremely low temperature in winter in cold regions, or high temperature weather in summer, or diversified energy demand of different building types, the system can show strong environmental adaptability and working condition adjustment ability, and can be widely used in energy supply scenes of different climate regions and different types of buildings, and has broad market application prospect.

[0043] (6) Significant economic cost advantage: the system can effectively reduce peak electricity load to achieve "peak shaving", and through reasonable use of price difference in different time periods, energy storage operation is carried out in low valley electricity price period, and stored energy is used for energy supply in peak period, thereby greatly reducing system operation cost, having significant economic benefit, and improving the competitiveness of the system in the market. BRIEF DESCRIPTION OF DRAWINGS

[0044] Fig. 1 It is a schematic diagram of the new PVT-air source dual-source non-frosting heat pump system of the present application.

[0045] Fig. 2 It is a structural schematic diagram of the PVT assembly of the new PVT-air source dual-source non-frosting heat pump system of the present application.

[0046] Fig. 3 It is a structural schematic diagram of the heat exchange unit in the ice storage box of the new PVT-air source dual-source non-frosting heat pump system of the present application.

[0047] 1, PVT assembly; 2, ice storage tank; 3, air-antifreeze heat exchanger; 4, water source heat pump assembly; 5, plate heat exchanger; 6, energy storage water tank; 7, air conditioning terminal; 8, first water pump; 9, second water pump; 10, third water pump; 11, fourth water pump; 12, fifth water pump; 13, first solenoid valve; 14, second solenoid valve; 15, third solenoid valve; 16, fourth solenoid valve; 17, fifth solenoid valve; 18, sixth solenoid valve; 19, seventh solenoid valve; 20, eighth solenoid valve; 21, ninth solenoid valve; 22, tenth solenoid valve; 23, eleventh solenoid valve; 24, twelfth solenoid valve; 25, thirteenth solenoid valve; 26, fourteenth solenoid valve; 27, fifteenth solenoid valve; 28, sixteenth solenoid valve; 29, seventeenth solenoid valve; 30, eighteenth solenoid valve; 31, nineteenth solenoid valve; 101, photovoltaic backboard; 102, first multi-channel flat tube; 103, flat plate heat pipe; 201, second multi-channel flat tube; 202, closed rectangular fin. DETAILED DESCRIPTION

[0048] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0049] Example 1

[0050] Reference Figs. 1 to 3 A new PVT-air source dual-source frost-free heat pump system, the evaporator of the heat pump system in heating mode is the ice storage tank 2, the evaporation heat is the latent heat of phase change of water into ice in the ice storage tank 2, and the heat of ice into water is provided by the PVT assembly 1 and air energy;

[0051] The heat pump system comprises a PVT assembly 1, an ice storage tank 2, an air-antifreeze heat exchanger 3, a water source heat pump assembly 4, a plate heat exchanger 5, an energy storage water tank 6 and an air conditioning terminal 7;

[0052] The evaporation side of the water source heat pump assembly 4 is provided with three channel circuits arranged in parallel, which are respectively a first circulation circuit, a second circulation circuit and a third circulation circuit; the first circulation circuit is connected with the PVT assembly 1 to form a PVT assembly water circulation circuit; the second circulation circuit is connected with the air-antifreeze heat exchanger 3 to form an air-antifreeze heat exchanger water circulation circuit; the third circulation circuit is connected with the ice storage tank 2 to form an ice storage tank water circulation circuit; the condensation side of the water source heat pump assembly 4 is connected with the plate heat exchanger 5 to form a fourth circulation circuit;

[0053] Among them, the switching control among the three circulation circuits is realized through an electric three-way valve, and a solenoid valve and a water pump are connected on each circulation circuit;

[0054] The energy storage tank and the plate heat exchanger are connected by pipelines to form a fifth circulating loop; the plate heat exchanger and the air conditioner terminal are connected by pipelines to form a sixth circulating loop; and the energy storage tank and the air conditioner terminal are connected by pipelines to form a seventh circulating loop.

[0055] Through the above technical solution, by integrating and cooperatively controlling the key components in the system, i.e., the PVT component 1, the ice storage tank 2, the air-antifreeze liquid heat exchanger 3, the water source heat pump component, the plate heat exchanger 5, the energy storage tank 6 and the air conditioner terminal 7, the efficient integration and complementary utilization of multiple energies are achieved, and the energy utilization efficiency and the operation stability of the system in different seasons in cold regions are significantly improved.

[0056] In this embodiment, the heat collecting unit in the PVT component 1 adopts a flat plate heat pipe structure, and the collected heat can be stored in the ice storage tank 2 or directly used as a low-temperature heat source of the water source heat pump component through a heat collecting cycle operated by a water pump.

[0057] In this embodiment, the PVT component 1 adopts a single-crystal silicon cell panel or a multi-crystal silicon cell panel, and the photovoltaic power generation unit of the PVT component 1 is connected to the building power distribution system through an inverter.

[0058] Through the above technical solution, the PVT component 1 is composed of a photovoltaic cell layer and a heat collecting layer, the photovoltaic cell layer is made of single-crystal silicon or multi-crystal silicon, and the output end is connected to the building power distribution system; the heat collecting layer is connected to the ice storage tank 2 or the evaporator of the water source heat pump component through a circulating pipeline.

[0059] In this embodiment, the ice storage tank 2 adopts an indirect heat exchange structure, and the heat exchanger of the ice storage tank 2 adopts a multi-channel flat tube structure; the main body of the heat exchanger of the ice storage tank 2 is a flat channel formed by metal extrusion, and the inside is a plurality of side-by-side arranged square channels, and the outer side of the flat tube is provided with fins.

[0060] Through the above technical solution, the ice storage tank 2 is provided with a multi-channel flat tube heat exchanger, the multi-channel flat tube heat exchanger is provided with a plurality of second multi-channel flat tubes 201, the cross section of the flat tube is rectangular, the internal flowing fluid is water or glycol solution or antifreeze liquid, etc., the outside is provided with aluminum fins, and the energy storage medium is water; the heat exchanger is connected to the ice storage tank 2, the air-antifreeze liquid heat exchanger 3 or the evaporator of the water source heat pump component through a circulating pipeline; the heat exchange structure of the ice storage tank 2 includes the second multi-channel flat tube 201 and a closed rectangular fin 202, the closed rectangular fin 202 is a metal material extruded to have a plurality of side-by-side arranged hole structures, and the internal fluid is water.

[0061] In this embodiment, the air-antifreeze liquid heat exchanger 3 adopts a finned tube structure, and a heat exchange cycle is operated by a water pump, in the heating mode, the air-antifreeze liquid heat exchanger 3 melts ice for the ice storage tank 2 or serves as a low-temperature heat source of the water source heat pump component, and in the cooling mode, the air-antifreeze liquid heat exchanger 3 serves as a cold source of the water source heat pump component.

[0062] Through the technical scheme, the air-antifreeze liquid heat exchanger 3 is an air-antifreeze liquid heat exchanger, the air-antifreeze liquid heat exchanger adopts a finned tube structure, and is connected with the water source heat pump assembly 4 or the ice storage tank 2 through a circulating pipeline.

[0063] In the refrigeration mode, the water source heat pump assembly 4 takes the air-antifreeze liquid heat exchanger 3 as a cold source, and stores cold through the ice storage tank 2 or the energy storage water tank 6.

[0064] In the heating mode, the freezing latent heat of water in the PVT assembly 1, the air-antifreeze liquid heat exchanger 3 and the ice storage tank 2 can all be used as a low-temperature heat source of the water source heat pump assembly 4, and heat is stored through the energy storage water tank 6; in the daytime, ice in the ice storage tank 2 is melted by using solar energy or air energy to recover energy for continuous and stable operation, the PVT assembly 1 collects heat and generates electricity at the same time to meet the electricity demand of the building.

[0065] In the heating mode, when the ice in the ice storage tank 2 is melted by using air energy to recover energy for continuous and stable operation, the air-antifreeze liquid heat exchanger never frosts because the temperature of the air side must be higher than the freezing point temperature to melt the ice in the ice storage tank and store heat when the air-antifreeze liquid heat exchanger absorbs air energy.

[0066] In the embodiment, the plate heat exchanger 5 is composed of corrugated stainless steel sheets which are welded together, and high-efficiency flow channel structures are formed between adjacent corrugated sheets.

[0067] Through the technical scheme, the plate heat exchanger 5 is a plate heat exchanger, the plate heat exchanger 5 adopts a corrugated stainless steel sheet structure, one side of the plate heat exchanger 5 is connected with the ice storage tank 2 or the water source heat pump assembly, and the other side of the plate heat exchanger 5 is connected with the energy storage water tank 6 or the air conditioner terminal 7.

[0068] In the embodiment, the energy storage water tank 6 is an open direct heat exchange water tank, and the energy storage working medium is water.

[0069] Through the technical scheme, the energy storage water tank 6 has an open structure, a water supplementing port is arranged at the top of the energy storage water tank 6, one side of the energy storage water tank 6 is connected with the air conditioner terminal 7 through a circulating pipeline, and the other side of the energy storage water tank 6 is connected with the plate heat exchanger 5.

[0070] In the embodiment, the air conditioner terminal 7 adopts a fan coil.

[0071] By the technical scheme, the air conditioner terminal 7 is a fan-coil structure; the heat collection layer heat exchange structure of the PVT assembly 1 includes a flat plate heat pipe 103 and a first multi-channel flat tube 102, the flat plate heat pipe 103 is a flat heat conductor formed by extrusion of a metal material and has a porous structure, has a plurality of parallel arranged channels that are not communicated with each other, and encapsulates phase change working medium; one side of the flat plate heat pipe 103 is attached to a photovoltaic back plate 101 of the PVT, and the condensation section of the other side is attached to the first multi-channel flat tube 102; the multi-channel flat tube body is a flat tube formed by extrusion of a metal material, both ends of the inside are converging flow channels, and a plurality of parallel arranged square or rectangular branch channels are arranged between the converging channels, and the inside fluid is water or antifreeze.

[0072] Embodiment 2

[0073] A working method of a new PVT-air source dual-source frost-free heat pump system, for the working method of the new PVT-air source dual-source frost-free heat pump system in embodiment 1, the working method comprises the following steps:

[0074] Heating mode:

[0075] S1, the water source heat pump assembly 4 serves as a main cold and heat source and bears equipment, the heat sources in the heating mode are solar energy, air energy and latent heat of water in the ice storage tank 2;

[0076] S11, if the heat source in the heating mode is solar energy as a low-temperature heat source, the fluid circulates in the PVT assembly water circulation loop, and the fluid flows out from the water source heat pump assembly 4, passes through the PVT assembly 1 and returns to the evaporator of the water source heat pump assembly 4;

[0077] S12, if the heat source in the heating mode is air energy as a low-temperature heat source, the fluid circulates in the air-antifreeze heat exchanger water circulation loop, and the fluid flows out from the water source heat pump assembly 4, passes through the air-antifreeze heat exchanger 3 and returns to the evaporator of the water source heat pump assembly 4;

[0078] S13, if the heat source in the heating mode is the ice storage tank 2 as a low-temperature heat source, the fluid circulates in the ice storage tank water circulation loop, the fluid of the evaporating side of the water source heat pump assembly 4 flows out from the water source heat pump assembly 4, passes through the ice storage tank 2 and returns to the evaporator of the water source heat pump assembly 4; the fluid of the condensing side of the water source heat pump assembly 4 passes through the plate heat exchanger 5 and returns to the condenser of the water source heat pump assembly 4;

[0079] S2, the user side has a heat pump direct supply mode, an ice storage tank 6 heat storage mode and an ice storage tank 6 heating mode according to the heat use condition of the user and the heat storage condition of the ice storage tank 6;

[0080] S21, the heat pump direct supply mode: the fluid circulates in the fourth circulation loop, the fluid flows out from the water source heat pump assembly 4, passes through the air conditioner terminal 7 and returns to the plate heat exchanger 5;

[0081] S22, the energy storage water tank 6 heat storage mode: the fluid in the fifth circulating loop circulating flow, the fluid from the plate heat exchanger 5 after the energy storage water tank 6 return to the plate heat exchanger 5;

[0082] S23, the energy storage water tank 6 heat supply mode: the fluid in the seventh circulating loop circulating flow, the fluid from the energy storage water tank 6 after the air conditioning terminal 7 return to the energy storage water tank 6;

[0083] Wherein, in the daytime, the ice storage tank 2 can collect solar energy and air energy; the ice storage tank 2 collects solar energy, the fluid returns to the ice storage tank 2 after the PVT assembly 1; the ice storage tank 2 collects air energy, the fluid returns to the ice storage tank 2 after the air-antifreeze heat exchanger 3.

[0084] Cooling mode:

[0085] S1, the water source heat pump assembly 4 cooling heat source is air energy, the fluid in the air-antifreeze heat exchanger water circulating loop circulating flow, the fluid from the water source heat pump assembly 4 after the air-antifreeze heat exchanger 3 return to the condenser of the water source heat pump assembly 4;

[0086] S2, the user side according to the user cooling condition and the cold storage condition, respectively, there is a heat pump direct supply mode, the energy storage water tank 6 cold storage mode, the energy storage water tank 6 cooling mode, the ice storage tank 2 cold storage mode and the ice storage tank 2 cooling mode;

[0087] S21, the heat pump direct supply mode: the fluid in the sixth circulating loop circulating flow, the fluid from the plate heat exchanger 5 after the air conditioning terminal 7 return to the plate heat exchanger 5; the fluid of the water source heat pump assembly 4 evaporation side returns to the evaporator of the water source heat pump assembly 4 through the plate heat exchanger 5;

[0088] S22, the energy storage water tank 6 cold storage mode: the fluid in the fifth circulating loop circulating flow, the fluid from the plate heat exchanger 5 after the energy storage water tank 6 return to the plate heat exchanger 5; the fluid of the water source heat pump assembly 4 evaporation side returns to the evaporator of the water source heat pump assembly 4 through the plate heat exchanger 5;

[0089] S23, the energy storage water tank 6 cooling mode: the fluid in the seventh circulating loop circulating flow, the fluid from the energy storage water tank 6 after the air conditioning terminal 7 return to the energy storage water tank 6;

[0090] S24, the ice storage tank 2 cold storage mode: the fluid in the ice storage tank water circulating loop circulating flow, the fluid from the water source heat pump assembly 4 after the ice storage tank 2 return to the evaporator of the water source heat pump assembly 4;

[0091] S25, the ice storage tank 2 cooling mode: the fluid from the plate heat exchanger 5 after the ice storage tank 2 return to the plate heat exchanger 5; the user side fluid returns to the plate heat exchanger 5 through the air conditioning terminal 7.

[0092] Example 3

[0093] This embodiment is further provided on the basis of embodiment 1.

[0094] In this embodiment, the first interface of the first connecting pipe of the water source heat pump assembly 4 and the first end of the PVT assembly 1 are connected through a first communication pipe, and the first interface of the second connecting pipe of the water source heat pump assembly 4 and the second end of the PVT assembly 1 are connected through a second communication pipe, to form a PVT assembly 1 water circulation loop; wherein the first communication pipe is connected with a first water pump 8 and a seventh electromagnetic valve 19, and the second connecting pipe of the water source heat pump assembly 4 is connected with an eighth electromagnetic valve 20.

[0095] The second interface of the first connecting pipe of the water source heat pump assembly 4 and the inlet of the air-antifreeze liquid heat exchanger 3 are connected through a third communication pipe, and the second interface of the second connecting pipe of the water source heat pump assembly 4 and the outlet of the air-antifreeze liquid heat exchanger 3 are connected through a fourth communication pipe, to form an air-antifreeze liquid heat exchanger 3 water circulation loop; wherein the third communication pipe is connected with a fourth electromagnetic valve 16 and a second water pump 9.

[0096] The first opening of the ice storage tank 2 and the first communication pipe are connected through a fifth communication pipe, so that the first opening of the ice storage tank 2 is communicated with the first connecting pipe of the water source heat pump assembly 4, and the second opening of the ice storage tank 2 and the second communication pipe are connected through a sixth communication pipe, so that the second opening of the ice storage tank 2 is communicated with the second connecting pipe of the water source heat pump assembly 4, to form an ice storage tank 2 water circulation loop; wherein the sixth communication pipe is connected with a first electromagnetic valve 13, the fifth communication pipe and the third communication pipe are connected through a seventh communication pipe, and one end of the seventh communication pipe is connected between the fourth electromagnetic valve 16 and the second water pump 9.

[0097] The connection between the first communication pipe and the fifth communication pipe and the connection between the first communication pipe and the first interface of the first connecting pipe of the water source heat pump assembly 4 are connected with a sixth electromagnetic valve 18, and the sixth electromagnetic valve 18 is connected to the first communication pipe; the connection between the second communication pipe and the sixth communication pipe and the connection between the fourth communication pipe and the second interface of the second connecting pipe of the water source heat pump assembly 4 are provided with a second electromagnetic valve 14 and a third electromagnetic valve 15, and the second electromagnetic valve 14 and the third electromagnetic valve 15 are connected to the second communication pipe.

[0098] The first interface of the third connecting pipe of the water source heat pump assembly 4 is connected with the first interface of the plate heat exchanger 5 through an eighth communication pipe, and the second interface of the third connecting pipe of the water source heat pump assembly 4 is connected with the second communication pipe through a ninth communication pipe, and the ninth communication pipe is connected between the third electromagnetic valve 15 and the fourth electromagnetic valve 16; wherein the third connecting pipe of the water source heat pump assembly 4 is connected with a tenth electromagnetic valve 22, and the eighth communication pipe is connected with a twelfth electromagnetic valve 24.

[0099] The first interface of the fourth connecting pipe of the water source heat pump assembly 4 is connected with the second interface of the plate heat exchanger 5 through the tenth communication pipe, and the second interface of the fourth connecting pipe of the water source heat pump assembly 4 is connected with the first communication pipe through the eleventh communication pipe, wherein the tenth communication pipe is connected with the third water pump 10, the ninth electromagnetic valve 21 and the eleventh electromagnetic valve 23; the eleventh communication pipe between the ninth electromagnetic valve 21 and the eleventh electromagnetic valve 23 is connected with the tenth communication pipe through the twelfth communication pipe, wherein one end of the twelfth communication pipe is connected between the third water pump 10 and the second interface of the plate heat exchanger 5, the other end is connected between the ninth electromagnetic valve 21 and the eleventh electromagnetic valve 23, and the twelfth communication pipe is connected with the thirteenth electromagnetic pump.

[0100] The third interface of the plate heat exchanger 5 and the first interface of the air conditioner terminal 7 are connected through the thirteenth communication pipe, and the fourth interface of the plate heat exchanger 5 and the second interface of the air conditioner terminal 7 are connected through the fourteenth communication pipe; wherein the thirteenth communication pipe is connected with the fourteenth electromagnetic valve 26 and the seventeenth electromagnetic valve 29, and the fourteenth communication pipe is connected with the sixteenth electromagnetic valve 28 and the fifth water pump 12.

[0101] The first interface of the energy storage water tank 6 and the thirteenth communication pipe are connected through the fifteenth communication pipe, and the end of the fifteenth communication pipe is connected between the fourteenth electromagnetic valve 26 and the seventeenth electromagnetic valve 29, and the fifteenth communication pipe is connected with the fifteenth electromagnetic valve 27.

[0102] The second interface of the energy storage water tank 6 and the thirteenth communication pipe are connected through the sixteenth communication pipe, and the sixteenth communication pipe is connected between the seventeenth electromagnetic valve 29 and the first interface of the air conditioner terminal 7, and the sixteenth communication pipe is connected with the eighteenth electromagnetic valve 30.

[0103] The third interface of the energy storage water tank 6 and the fourteenth communication pipe are connected through the seventeenth communication pipe, and the end of the seventeenth communication pipe is connected on the fourteenth communication pipe between the sixteenth electromagnetic valve 28 and the fourth interface of the plate heat exchanger 5, and the seventeenth communication pipe is connected with the fourth water pump 11.

[0104] The fourth interface of the energy storage water tank 6 and the fourteenth communication pipe are connected through the eighteenth communication pipe, and the end of the eighteenth communication pipe is connected on the fourteenth communication pipe between the sixteenth electromagnetic valve 28 and the fifth water pump 12, and the eighteenth communication pipe is connected with the nineteenth electromagnetic valve 31.

[0105] Embodiment 4

[0106] The working method of the new PVT-air source dual-source frost-free heat pump system in this embodiment is the working method of the new PVT-air source dual-source frost-free heat pump system in embodiment 3, and the working method comprises the following steps:

[0107] Heating mode:

[0108] S1, the water source heat pump assembly 4 as the main cold and heat source undertakes the equipment, the heat source of heating respectively has solar energy, air energy and the latent heat of water in the ice storage tank 2;

[0109] S11, if the heat source of heating is solar energy as low-temperature heat source, the fluid circulates in the PVT assembly water circulation loop, the fluid flows out from the water source heat pump assembly 4 and sequentially passes through the sixth electromagnetic valve 18, the seventh electromagnetic valve 19, the first water pump 8, the PVT assembly 1, the second electromagnetic valve 14, the third electromagnetic valve 15, the eighth electromagnetic valve 20 and then returns to the evaporator of the water source heat pump assembly 4;

[0110] S12, if the heat source of heating is air energy as low-temperature heat source, the fluid circulates in the air-antifreeze liquid heat exchanger water circulation loop, the fluid flows out from the water source heat pump assembly 4 and sequentially passes through the second water pump 9, the fourth electromagnetic valve 16, the air-antifreeze liquid heat exchanger 3, the eighth electromagnetic valve 20 and then returns to the evaporator of the water source heat pump assembly 4; the fluid returns to the evaporator of the heat pump.

[0111] S13, if the heat source of heating is the ice storage tank 2 as low-temperature heat source, the fluid circulates in the ice storage tank water circulation loop, the fluid of the evaporating side of the water source heat pump assembly 4 flows out from the water source heat pump assembly 4 and sequentially passes through the second water pump 9, the fifth electromagnetic valve 17, the ice storage tank 2, the first electromagnetic valve 13, the second electromagnetic valve 14, the third electromagnetic valve 15, the eighth electromagnetic valve 20 and then returns to the evaporator of the water source heat pump assembly 4; the fluid of the condensing side of the water source heat pump assembly 4 sequentially passes through the third water pump 10, the plate heat exchanger 5, the twelfth electromagnetic valve 24, the tenth electromagnetic valve 22 and then returns to the condenser of the water source heat pump assembly 4;

[0112] S2, the user side has heat pump direct supply, ice storage tank 6 heat storage and ice storage tank 6 heating modes according to the user heat use and the heat storage of the ice storage tank 6; in the heat pump direct supply mode, the fluid returns to the plate heat exchanger.

[0113] S21, the heat pump direct supply mode: the fluid circulates in the fourth circulation loop, the fluid flows out from the water source heat pump assembly 4 and sequentially passes through the sixteenth electromagnetic valve 28, the fifth water pump 12, the air conditioning terminal 7, the seventeenth electromagnetic valve 29 and the fourteenth electromagnetic valve 26 and then returns to the plate heat exchanger 5;

[0114] S22, the ice storage tank 6 heat storage mode: the fluid circulates in the fifth circulation loop, the fluid flows out from the plate heat exchanger 5 and sequentially passes through the fourth water pump 11, the ice storage tank 6, the fifteenth electromagnetic valve 27 and the fourteenth electromagnetic valve 26 and then returns to the plate heat exchanger 5;

[0115] S23, the energy storage water tank 6 heating mode: the fluid circulates in the seventh circulation loop, the fluid flows out from the energy storage water tank 6 and returns to the energy storage water tank 6 in turn through the nineteenth electromagnetic valve 31, the fifth water pump 12, the air conditioning terminal 7 and the eighteenth electromagnetic valve 30;

[0116] Wherein, during the day, the ice storage tank 2 can collect solar energy and air energy; the ice storage tank 2 collects solar energy, and the fluid returns to the ice storage tank 2 after passing through the PVT assembly 1; the ice storage tank 2 collects air energy, and the fluid returns to the ice storage tank 2 after passing through the air-antifreeze liquid heat exchanger 3.

[0117] Cooling mode:

[0118] S1, when the water source heat pump assembly 4 cools, the heat source is air energy, the fluid circulates in the air-antifreeze liquid heat exchanger water circulation loop, and the fluid flows out from the water source heat pump assembly 4 and returns to the condenser of the water source heat pump assembly 4 in turn through the second water pump 9, the fourth electromagnetic valve 16, the air-antifreeze liquid heat exchanger 3 and the eighth electromagnetic valve 20;

[0119] S2, the user side has a heat pump direct supply mode, an energy storage water tank 6 cooling storage mode, an energy storage water tank 6 cooling supply mode, an ice storage tank 2 cooling storage mode and an ice storage tank 2 cooling supply mode according to the user cooling condition and the cooling storage condition;

[0120] S21, the heat pump direct supply mode: the fluid circulates in the sixth circulation loop, the fluid flows out from the plate heat exchanger 5 and returns to the plate heat exchanger 5 in turn through the sixteenth electromagnetic valve 28, the fifth water pump 12, the air conditioning terminal 7, the seventeenth electromagnetic valve 29 and the fourteenth electromagnetic valve 26; the fluid of the evaporation side of the water source heat pump assembly 4 returns to the evaporator of the water source heat pump assembly 4 through the third water pump 10, the plate heat exchanger 5, the twelfth electromagnetic valve 24 and the tenth electromagnetic valve 22;

[0121] S22, the energy storage water tank 6 cooling storage mode: the fluid circulates in the fifth circulation loop, the fluid returns to the plate heat exchanger 5 after passing through the fourth water pump 11, the energy storage water tank 6, the fifteenth electromagnetic valve 27 and the fourteenth electromagnetic valve 26; the fluid of the evaporation side of the water source heat pump assembly 4 returns to the evaporator of the water source heat pump assembly 4 through the third water pump 10, the plate heat exchanger 5, the twelfth electromagnetic valve 24 and the tenth electromagnetic valve 22;

[0122] S23, the energy storage water tank 6 cooling supply mode: the fluid circulates in the seventh circulation loop, the fluid flows out from the energy storage water tank 6 and returns to the energy storage water tank 6 in turn through the nineteenth electromagnetic valve 31, the fifth water pump 12, the air conditioning terminal 7 and the eighteenth electromagnetic valve 30;

[0123] S24, the ice storage tank 2 cold storage mode: fluid in the ice storage tank water circulation circuit circulation, fluid from the water source heat pump assembly 4 out in turn through the third water pump 10, the thirteenth solenoid valve 25, the ninth solenoid valve 21, the ice storage tank 2, the first solenoid valve 13, the second solenoid valve 14, the tenth solenoid valve 22, and then return to the water source heat pump assembly 4 evaporator;

[0124] S25, the ice storage tank 2 cold storage mode: fluid from the plate heat exchanger 5 in turn through the twelfth solenoid valve 24, the second solenoid valve 14, the first solenoid valve 13, the ice storage tank 2, the ninth solenoid valve 21, the eleventh solenoid valve 23, the third water pump 10, and then return to the plate heat exchanger 5; user side fluid in turn through the sixteenth solenoid valve 28, the fifth water pump 12, the air conditioning terminal 7, the seventeenth solenoid valve 29, the fourteenth solenoid valve 26, and then return to the plate heat exchanger 5.

[0125] The above, only is the preferred embodiment of the present application, not any limit to the technical scope of the present application, therefore, according to the technical essence of the present application, any slight modification, equivalent change and modification to the above embodiment, still belongs to the scope of the present application technical solution.

Claims

1. A novel PVT-air source dual-source frost-free heat pump system, characterized in that, In the heating mode, the evaporator of the heat pump system is a storage refrigerator. The heat of evaporation is the latent heat of phase change of water in the storage refrigerator turning into ice. The heat for ice to regenerate into water is provided by the PVT components and air energy. The heat pump system includes: PVT components, a refrigerator, an air-antifreeze heat exchanger, a water source heat pump component, a plate heat exchanger, an energy storage tank, and air conditioning terminals; The evaporator side of the water source heat pump assembly is provided with three parallel channel loops, namely a first circulation loop, a second circulation loop, and a third circulation loop; the first circulation loop is connected to the PVT assembly to form a PVT assembly water circulation loop; the second circulation loop is connected to the air-antifreeze heat exchanger to form an air-antifreeze heat exchanger water circulation loop; the third circulation loop is connected to the refrigerator to form a refrigerator water circulation loop; the condenser side of the water source heat pump assembly is connected to a plate heat exchanger to form a fourth circulation loop; The three circulation loops are switched and controlled by an electric three-way valve, and each circulation loop is connected to a solenoid valve and a water pump. The energy storage tank and the plate heat exchanger are connected by pipelines to form a fifth circulation loop; the plate heat exchanger and the air conditioning terminal are connected by pipelines to form a sixth circulation loop; the energy storage tank and the air conditioning terminal are connected by pipelines to form a seventh circulation loop.

2. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The heat collection unit in the PVT component adopts a flat plate heat pipe structure. It operates a heat collection cycle through a water pump. The collected heat is stored in the refrigerator by melting ice or directly used as a low-temperature heat source for the water source heat pump component.

3. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The PVT module uses monocrystalline silicon solar panels or polycrystalline silicon solar panels, and the photovoltaic power generation unit of the PVT module is connected to the building power distribution system through an inverter.

4. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The refrigerator adopts an indirect heat exchange structure, and the heat exchanger of the refrigerator adopts a multi-channel flat tube structure; the main body of the heat exchanger of the refrigerator is a flat channel made of metal extrusion, with multiple square channels arranged side by side inside, and fins are set on the outside of the flat tube.

5. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The air-antifreeze heat exchanger adopts a finned tube structure and operates a heat exchange cycle through a water pump. In heating mode, it melts ice for the refrigerator or serves as a low-temperature heat source for the water source heat pump assembly. In cooling mode, it serves as a cold source for the water source heat pump assembly.

6. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, In cooling mode, the water source heat pump assembly uses the air-antifreeze heat exchanger as the cold source and stores cold through the refrigerator or the energy storage tank. In heating mode, the PVT module, the air-antifreeze heat exchanger, and the latent heat of condensation of water in the storage tank can all serve as low-temperature heat sources for the water source heat pump module, and heat is stored through the energy storage tank. During the day, while providing heating, solar energy or air energy is used to melt ice in the storage tank to restore energy and achieve continuous and stable operation. The PVT module generates photovoltaic power while collecting heat to meet the building's electricity demand.

7. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The plate heat exchanger is made of corrugated stainless steel plates welded together, and a flow channel structure is formed between adjacent corrugated plates.

8. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The energy storage tank is an open direct heat exchange tank, and the energy storage medium is water.

9. The novel PVT-air source dual-source frost-free heat pump system according to claim 1, characterized in that, The air conditioning terminal uses a fan coil unit.

10. A method for operating a novel PVT-air source dual-source frost-free heat pump system, characterized in that, A method for operating the novel PVT-air source dual-source frost-free heat pump system according to any one of claims 1 to 9, the method comprising the following steps: In heating mode: S1. The water source heat pump component serves as the main cold and heat source, and the heat sources during heating are solar energy, air energy and the latent heat of water in the refrigerator. S11. If solar energy is used as a low-temperature heat source during heating, the fluid flows out of the water source heat pump component, passes through the PVT component, and then returns to the evaporator of the water source heat pump component. S12. If the heat source during heating is air energy as a low-temperature heat source, the fluid flows out of the water source heat pump component and returns to the evaporator of the water source heat pump component after passing through the air-antifreeze heat exchanger. S13. If the heat source during heating is a storage refrigerator as a low-temperature heat source, the fluid flows out of the water source heat pump assembly, passes through the storage refrigerator, and then returns to the evaporator of the water source heat pump assembly; the fluid on the condenser side of the water source heat pump assembly passes through the plate heat exchanger and then returns to the condenser of the water source heat pump assembly. S2. On the user side, depending on the user's heat consumption and the heat storage capacity of the energy storage tank, there are three modes: direct heat pump supply, energy storage tank heat storage, and energy storage tank heating. S21, direct heat pump supply mode: fluid returns to the plate heat exchanger after passing through the air conditioning terminal; S22, Energy storage tank heat storage mode: After the fluid flows out of the plate heat exchanger, it passes through the energy storage tank and then returns to the plate heat exchanger. S23, Energy storage tank heating mode: After the fluid flows out of the energy storage tank, it passes through the air conditioning terminal and then returns to the energy storage tank; Heating mode: S1. The heat source for the water source heat pump component during cooling is air energy. After the fluid flows out of the water source heat pump component, it passes through the air-antifreeze heat exchanger and returns to the condenser of the water source heat pump component. S2. On the user side, depending on the user's cooling demand and cooling storage situation, there are different modes: direct heat pump supply mode, energy storage tank cooling storage mode, energy storage tank cooling supply mode, energy storage refrigerator cooling storage mode, and energy storage refrigerator cooling supply mode. S21, Direct heat pump mode: After the fluid flows out of the plate heat exchanger, it returns to the plate heat exchanger through the air conditioning terminal; the fluid on the evaporator side of the water source heat pump component returns to the evaporator of the water source heat pump component through the plate heat exchanger. S22, Energy storage tank cold storage mode: The fluid returns to the plate heat exchanger after passing through the energy storage tank from the plate heat exchanger; the fluid on the evaporator side of the water source heat pump component returns to the evaporator of the water source heat pump component through the plate heat exchanger. S23, Cooling mode of energy storage tank: After the fluid flows out of the energy storage tank, it returns to the energy storage tank through the air conditioning terminal; S24, Cold Storage Mode of Refrigerator: After the fluid flows out of the water source heat pump component, it returns to the evaporator of the water source heat pump component through the refrigerator. S25, Cooling mode of the storage refrigerator: The fluid returns to the plate heat exchanger after passing through the storage refrigerator from the plate heat exchanger. User-side fluid returns to the plate heat exchanger via the air conditioning terminal.

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