Photovoltaic photo-thermal-double-source heat pump energy supply system

Abstract

The utility model discloses a photovoltaic photo-thermal-double-source heat pump energy supply system which comprises a PV / T photovoltaic photo-thermal plate, an air source heat pump unit, a water source heat pump unit, a heat storage water tank and a circulating water tank. Wherein the PV / T photovoltaic photo-thermal plate is respectively connected with the air source heat pump unit, the heat storage water tank and the circulating water tank through a circulating pipeline consisting of a plurality of connecting pipes, a plurality of communicating valves and a plurality of circulating pumps, and the heat storage water tank is connected with the water source heat pump unit through a first circulating pipeline; the circulating water tank is connected with the water source heat pump unit through a second circulating pipeline. The system has the beneficial effects that different modes are operated according to the radiation intensity of sunlight, the system is connected with the heat storage water tank to serve as a heat source, a closed water circulation mode is adopted, surface water is not adopted as the heat source, and the temperature, water volume and water quality requirements of the water source do not need to be considered.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of energy supply systems, in particular to a kind of photovoltaic photo-thermal-double source heat pump energy supply system. BACKGROUND

[0002] At present, with the acceleration of urbanization, the energy consumption of public buildings is increasingly high, and the heating and cooling of public buildings accounts for a large part of energy consumption. As a green and low-carbon heat supply scheme, heat pumps can transfer low-grade heat to high-grade heat by consuming a small amount of electricity, have the advantages of environmental protection, energy saving, high energy efficiency ratio and low operating cost, and can meet the cooling and heating needs of various buildings, with great environmental and social benefits.

[0003] Due to the low ambient temperature in winter in the north, the energy efficiency ratio of air source heat pump system is greatly reduced. In terms of the unit itself, the evaporator is prone to frosting in low temperature conditions, which seriously reduces the COP of the heat pump system, and in severe cases, the heat pump will stop, so relying solely on air source heat pump in the north is not ideal.

[0004] Water source heat pump units need to consider that the water source meets certain temperature, water quantity and water quality requirements, and need to use shallow water sources on the earth's surface. Hydrological conditions are an important prerequisite for the normal and stable operation of water source heat pump unit systems.

[0005] Although solar energy is a renewable and abundant clean energy, the supply of solar energy is affected by weather, is intermittent and unstable. Under poor weather conditions, simple use of one or two heat pump technologies cannot meet the heating needs of buildings, and often requires high-grade energy consumption to achieve the cooling and heating load required by the room, which leads to a decrease in the overall efficiency of the system. SUMMARY

[0006] The main purpose of the utility model is to solve the problems of poor running stability and weak environmental adaptability of single heat source heat pump system.

[0007] Another purpose of the utility model is to solve the problems of insufficient running flexibility and difficulty in effectively balancing system heating (cooling) capacity and load demand of existing coupled heat pump systems.

[0008] The utility model provides a kind of photovoltaic photo-thermal-double source heat pump energy supply system to achieve the above purpose and solve the above problems.

[0009] The photovoltaic photo-thermal-double-source heat pump energy supply system comprises a PV / T photovoltaic photo-thermal plate, an air source heat pump unit, a water source heat pump unit, a heat storage water tank and a circulating water tank.

[0010] The PV / T photovoltaic photo-thermal plate is further connected with a photovoltaic reverse control all-in-one machine, one end of the photovoltaic reverse control all-in-one machine is further connected with an external power grid, and the photovoltaic reverse control all-in-one machine is further connected with compressors assembled in the air source heat pump unit and the water source heat pump unit.

[0011] The upper and lower ends of the PV / T photovoltaic photo-thermal plate are respectively provided with a first connecting pipe and a second connecting pipe, the rear end of the first connecting pipe is provided with a first three-way valve, the other two ends of the first three-way valve are respectively connected with a third connecting pipe and a fourth connecting pipe, the other end of the third connecting pipe is connected with the circulating water tank, the rear end of the fourth connecting pipe is connected with a four-way valve, the other three ends of the four-way valve are respectively connected with a fifth connecting pipe, a sixth connecting pipe and a seventh connecting pipe, the other end of the fifth connecting pipe is connected with a condenser arranged in the air source heat pump unit, the other end of the sixth connecting pipe is connected with a second three-way valve, the other two ends of the second three-way valve are respectively connected with the second connecting pipe and an eighth connecting pipe, the other end of the seventh connecting pipe is connected with a third three-way valve, the other two ends of the third three-way valve are respectively connected with a ninth connecting pipe and a tenth connecting pipe, the other end of the ninth connecting pipe is connected with the heat storage water tank, the other end of the tenth connecting pipe is connected with the circulating water tank, the other end of the eighth connecting pipe is connected with a fourth three-way valve, the other two ends of the fourth three-way valve are respectively connected with an eleventh connecting pipe and a twelfth connecting pipe, the other end of the eleventh connecting pipe is connected with the condenser arranged in the air source heat pump unit, and the other end of the twelfth connecting pipe is connected with the heat storage water tank.

[0012] The first connecting pipe is provided with a first circulating pump, the third connecting pipe is provided with a second circulating pump, the ninth connecting pipe is provided with a third circulating pump, the tenth connecting pipe is provided with a constant pressure tank and a first stop valve, the eleventh connecting pipe is provided with a fourth circulating pump, and the twelfth connecting pipe is provided with a fifth circulating pump.

[0013] The first circulating pipe connected between the heat storage water tank and the water source heat pump unit is provided with a sixth circulating pump and a second stop valve, and the first circulating pipe is connected with an evaporator arranged in the water source heat pump unit.

[0014] The second circulating pipe connected between the circulating water tank and the water source heat pump unit is provided with a seventh circulating pump and a third stop valve, and the second circulating pipe is connected with the condenser arranged in the water source heat pump unit.

[0015] The air source heat pump unit is internally provided with a compressor, a condenser, an expansion valve, an auxiliary heat source and an evaporator, and the compressor, the condenser, the expansion valve, the auxiliary heat source and the evaporator are sequentially connected through a third circulating pipeline.

[0016] The water source heat pump unit is internally provided with an evaporator, an expansion valve, a condenser and a compressor, and the evaporator, the expansion valve, the condenser and the compressor are connected through a fourth circulating pipeline.

[0017] The circulating water tank is connected with a temperature controller, and the circulating water tank is further connected with a floor heating coil and a fan coil through pipelines, and an eighth circulating pump, a fourth stop valve, a fifth stop valve, a sixth stop valve and a seventh stop valve are arranged on the connecting pipelines.

[0018] The photovoltaic reverse control integrated machine, the first three-way valve, the four-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve, the first circulating pump, the second circulating pump, the third circulating pump, the constant pressure tank, the first stop valve, the fourth circulating pump, the fifth circulating pump, the sixth circulating pump, the second stop valve, the seventh circulating pump, the third stop valve, the compressor, the condenser, the expansion valve, the auxiliary heat source, the evaporator, the temperature controller, the eighth circulating pump, the fourth stop valve, the fifth stop valve, the sixth stop valve and the seventh stop valve are all assembled from existing devices, and therefore the specific type and specification are not described in detail.

[0019] The working principle of the utility model is as follows:

[0020] The photovoltaic light-heat-double source heat pump energy supply system provided by the utility model has the following working states:

[0021] Solar energy supply: under the condition that the illumination condition is sufficient, when the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic light-heat panel is greater than 6 DEG C, the PV / T photovoltaic light-heat panel generates direct current and a large amount of low-grade heat by absorbing solar energy, the direct current is converted into alternating current by the photovoltaic reverse control integrated machine and then is used by the compressors of the air source heat pump unit and the water source heat pump unit, the first three-way valve is opened to connect the second circulating pump, the second circulating pump reaches the circulating water tank through the third connecting pipe, the first stop valve, the third three-way valve, the four-way valve and the second three-way valve are opened, the first circulating pump is connected with the return water end of the PV / T photovoltaic light-heat panel through the second connecting pipe, if the return water temperature of the circulating water tank is greater than the temperature of the heat storage water tank, the third circulating pump and the fifth circulating pump are opened, the return water enters the heat storage water tank to store heat in the water tank, the fourth three-way valve is opened to return to the PV / T photovoltaic light-heat panel through the eighth connecting pipe and the second connecting pipe to continue heating.

[0022] If the temperature of the circulating water tank reaches 45℃ and above, the eighth circulating pump is started by the temperature controller, the sixth and seventh stop valves are opened, and the fan coil is used to supply energy to the user; if the temperature of the circulating water tank reaches 35-45℃, the eighth circulating pump is started, the fourth and fifth stop valves are opened, and the floor heating coil is used to supply energy to the user; if the temperature of the circulating water tank is lower than 35℃, the solar energy combined with air energy supply mode is used.

[0023] Solar energy combined with air energy supply: under the condition of sufficient light, the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel is less than 6℃, and the return water temperature of the circulating water tank is lower than the temperature of the heat storage water tank, the fourth, second, first and third three-way valves are opened, the first, fourth and second circulating pumps are started, the four-way valve is opened, the first stop valve is opened, and the air source heat pump unit and the PV / T photovoltaic-thermal panel are connected in parallel to supply heat to the user end (fan coil or floor heating coil). If the return water temperature of the circulating water tank is higher than the temperature of the heat storage water tank, the third, first and fifth circulating pumps are started, the fourth, third and second three-way valves are opened, and the heat storage water tank is entered to store heat.

[0024] If the temperature of the circulating water tank reaches 45℃ and above, the eighth circulating pump is started by the temperature controller, the sixth and seventh stop valves are opened, and the fan coil is used to supply energy to the user; if the temperature of the circulating water tank reaches 35-45℃, the eighth circulating pump is started, the fourth and fifth stop valves are opened, and the floor heating coil is used to supply energy to the user; if the temperature of the circulating water tank is lower than 35℃, the solar energy combined with water source supply mode is used.

[0025] Solar energy combined with water source supply: under the condition of sufficient light, the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel is less than 6℃, and the temperature of the circulating water tank reaches the set heating temperature, the second and third stop valves are opened, the expansion valve is opened, the second, fourth, first and third three-way valves are opened, the first, third, fifth, sixth and seventh circulating pumps are started, the four-way valve and the compressor are opened, and the PV / T photovoltaic-thermal panel is connected in series with the water source heat pump unit to supply heat to the user end (fan coil or floor heating coil).

[0026] If the temperature of the circulating water tank reaches 45℃ and above, the eighth circulating pump is started by the temperature controller, the sixth and seventh stop valves are opened, and the fan coil is used to supply energy to the user; if the temperature of the circulating water tank reaches 35-45℃, the eighth circulating pump is started, the fourth and fifth stop valves are opened, and the floor heating coil is used to supply energy to the user; if the temperature of the circulating water tank is lower than 35℃, the solar energy combined with air energy combined with water source supply mode is used.

[0027] Solar energy coupled with air energy combined with water source energy supply: in the case of insufficient light conditions, and the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel is less than 6 DEG C, and the circulating water tank temperature reaches the set heating temperature, the second and third stop valves are opened, the expansion valve is opened, the second, fourth, first and third three-way valves are opened, the first, fourth, third, fifth, sixth and seventh circulating pumps are opened, the four-way valve and the compressor are opened, the PV / T photovoltaic-thermal panel and the air source heat pump unit are connected in parallel, and then the two are connected in series with the water source heat pump unit to supply heat to the user end (fan coil and floor heating coil).

[0028] If the circulating water tank temperature reaches 45 DEG C or above, the eighth circulating pump is opened by the temperature controller, the sixth and seventh stop valves are opened, and the fan coil is used to supply energy to the user; if the circulating water tank temperature reaches 35 DEG C-45 DEG C, the eighth circulating pump is opened, the fourth and fifth stop valves are opened, and the floor heating coil is used to supply energy to the user.

[0029] The utility model discloses beneficial effect has:

[0030] The photovoltaic-thermal dual-source heat pump energy supply system provided by the utility model runs different modes according to the radiation intensity of sunlight, when sunlight is sufficient and the temperature of the heat storage water tank does not reach the heating setting temperature, only solar energy is used for energy supply, when the circulating water tank temperature reaches 45 DEG C or above, the fan coil is used for user energy supply, when the circulating water tank temperature reaches 35 DEG C-45 DEG C, the floor heating coil is used for user energy supply; when sunlight is sufficient and the temperature of the heat storage water tank does not reach the heating setting temperature, solar energy is combined with air source energy supply, when the circulating water tank temperature reaches 45 DEG C or above, the fan coil is used for user energy supply, when the circulating water tank temperature reaches 35 DEG C-45 DEG C, the floor heating coil is used for user energy supply; when sunlight is sufficient and the temperature of the heat storage water tank reaches the heating setting temperature, solar energy is combined with water source heat pump energy supply, when the circulating water tank temperature reaches 45 DEG C or above, the fan coil is used for user energy supply, when the circulating water tank temperature reaches 35 DEG C-45 DEG C, the floor heating coil is used for user energy supply; when there is less solar radiation or no solar radiation at night, and the temperature of the water in the heat storage water tank is lower than the heating setting temperature, the air source heat pump and the solar panel can be started to store heat for the heat storage water tank, when frost appears, the electric heating device is opened to defrost the evaporator of the air source heat pump unit, when the circulating water tank temperature reaches 45 DEG C or above, the fan coil is used for user energy supply, when the circulating water tank temperature reaches 35 DEG C-45 DEG C, the floor heating coil is used for user energy supply.

[0031] The water source heat pump system in the utility model, this system passes through connecting heat storage water tank as heat source, adopts the closed water circulation mode, does not adopt the surface water as heat source, need not consider the temperature, water quantity, water quality requirement of water source. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The whole structure schematic diagram of photovoltaic photo-thermal-double source heat pump energy supply system is shown in the utility model.

[0033] The annotations in the above diagram are as follows:

[0034] 1, PV / T photovoltaic photo-thermal plate 2, air source heat pump unit 3, water source heat pump unit

[0035] 4, heat storage water tank 5, circulating water tank 6, first circulating pipeline 7, second circulating pipeline

[0036] 8, photovoltaic reverse control all-in-one machine 9, external power grid 10, compressor 11, first connecting pipe

[0037] 12, second connecting pipe 13, first three-way valve 14, third connecting pipe 15, fourth connecting pipe

[0038] 16, four-way valve 17, fifth connecting pipe 18, sixth connecting pipe 19, seventh connecting pipe

[0039] 20, condenser 21, eighth connecting pipe 22, third three-way valve 23, ninth connecting pipe

[0040] 24, tenth connecting pipe 25, fourth three-way valve 26, eleventh connecting pipe

[0041] 27, twelfth connecting pipe 28, first circulating pump 29, second circulating pump 30, third circulating pump

[0042] 31, constant pressure tank 32, first stop valve 33, fourth circulating pump 34, fifth circulating pump

[0043] 35, sixth circulating pump 36, second stop valve 37, evaporator 38, seventh circulating pump

[0044] 39, third stop valve 40, expansion valve 41, auxiliary heat source 42, third circulating pipeline

[0045] 43, fourth circulating pipeline 44, temperature controller 45, floor heating coil 46, fan coil

[0046] 47, eighth circulating pump 48, fourth stop valve 49, fifth stop valve 50, sixth stop valve

[0047] 51, second three-way valve 52, seventh stop valve. DETAILED DESCRIPTION

[0048] Please refer to Figure 1 shown:

[0049] The photovoltaic light-heat-double-source heat pump energy supply system comprises a PV / T photovoltaic light-heat plate 1, an air source heat pump unit 2, a water source heat pump unit 3, a heat storage water tank 4 and a circulating water tank 5, wherein the PV / T photovoltaic light-heat plate 1 is connected with the air source heat pump unit 2, the heat storage water tank 4 and the circulating water tank 5 through a circulating pipeline which is composed of a plurality of connecting pipes, a plurality of communication valves and a plurality of circulating pumps, the heat storage water tank 4 is connected with the water source heat pump unit 3 through a first circulating pipeline 6, and the circulating water tank 5 is connected with the water source heat pump unit 3 through a second circulating pipeline 7.

[0050] The PV / T photovoltaic light-heat plate 1 is further connected with a photovoltaic reverse control all-in-one machine 8, one end of the photovoltaic reverse control all-in-one machine 8 is connected with an external power grid 9, and the photovoltaic reverse control all-in-one machine 8 is further connected with compressors 10 arranged in the air source heat pump unit 2 and the water source heat pump unit 3.

[0051] The PV / T photovoltaic light-heat plate 1 is further connected with a photovoltaic reverse control all-in-one machine 8, one end of the photovoltaic reverse control all-in-one machine 8 is connected with an external power grid 9, and the photovoltaic reverse control all-in-one machine 8 is further connected with compressors 10 arranged in the air source heat pump unit 2 and the water source heat pump unit 3. The upper and lower ends of the PV / T photovoltaic light-heat plate 1 are respectively provided with a first connecting pipe 11 and a second connecting pipe 12, the rear end of the first connecting pipe 11 is provided with a first three-way valve 13, the other two ends of the first three-way valve 13 are respectively connected with a third connecting pipe 14 and a fourth connecting pipe 15, the other end of the third connecting pipe 14 is connected with the circulating water tank 5, the rear end of the fourth connecting pipe 15 is connected with a four-way valve 16, the other three ends of the four-way valve 16 are respectively connected with a fifth connecting pipe 17, a sixth connecting pipe 18 and a seventh connecting pipe 19, wherein the other end of the fifth connecting pipe 17 is connected with a condenser 20 arranged in the air source heat pump unit 2, the other end of the sixth connecting pipe 18 is connected with a second three-way valve 51, the other two ends of the second three-way valve 51 are respectively connected with the second connecting pipe 12 and an eighth connecting pipe 21, the other end of the seventh connecting pipe 19 is connected with a third three-way valve 22, the other two ends of the third three-way valve 22 are respectively connected with a ninth connecting pipe 23 and a tenth connecting pipe 24, the other end of the ninth connecting pipe 23 is connected with the heat storage water tank 4, the other end of the tenth connecting pipe 24 is connected with the circulating water tank 5, the other end of the eighth connecting pipe 21 is connected with a fourth three-way valve 25, the other two ends of the fourth three-way valve 25 are respectively connected with an eleventh connecting pipe 26 and a twelfth connecting pipe 27, the other end of the eleventh connecting pipe 26 is connected with the condenser 20 arranged in the air source heat pump unit 2, and the other end of the twelfth connecting pipe 27 is connected with the heat storage water tank 4.

[0052] The second connecting pipe 12 is provided with a first circulating pump 28, the third connecting pipe 14 is provided with a second circulating pump 29, the ninth connecting pipe 23 is provided with a third circulating pump 30, the tenth connecting pipe 24 is provided with a constant pressure tank 31 and a first stop valve 32, the eleventh connecting pipe 26 is provided with a fourth circulating pump 33, and the twelfth connecting pipe 27 is provided with a fifth circulating pump 34.

[0053] The first circulation pipe 6 connecting the hot water storage tank 4 and the water source heat pump unit 3 is equipped with a sixth circulation pump 35 and a second shut-off valve 36. The first circulation pipe 6 is connected to the evaporator 37 installed in the water source heat pump unit 3.

[0054] The second circulation pipeline 7, which connects the circulating water tank 5 to the water source heat pump unit 3, is equipped with a seventh circulation pump 38 and a third shut-off valve 39. The second circulation pipeline 7 is connected to the condenser 20 installed inside the water source heat pump unit 3.

[0055] The air source heat pump unit 2 is equipped with a compressor 10, a condenser 20, an expansion valve 40, an auxiliary heat source 41, and an evaporator 37. The compressor 10, condenser 20, expansion valve 40, auxiliary heat source 41, and evaporator 37 are connected in sequence through a third circulation pipeline 42.

[0056] The water source heat pump unit 3 is equipped with an evaporator 37, an expansion valve 40, a condenser 20, and a compressor 10. The evaporator 37, expansion valve 40, condenser 20, and compressor 10 are connected through a fourth circulation pipeline 43.

[0057] The circulating water tank 5 is connected to a temperature controller 44. The circulating water tank 5 is also connected to a floor heating coil 45 and a fan coil unit 46 through pipes. The connecting pipes are equipped with an eighth circulating pump 47, a fourth shut-off valve 48, a fifth shut-off valve 49, a sixth shut-off valve 50 and a seventh shut-off valve 52.

[0058] The aforementioned photovoltaic inverter control unit 8, first three-way valve 13, four-way valve 16, second three-way valve 51, third three-way valve 22, fourth three-way valve 25, first circulating pump 28, second circulating pump 29, third circulating pump 30, pressure tank 31, first shut-off valve 32, fourth circulating pump 33, fifth circulating pump 34, sixth circulating pump 35, second shut-off valve 36, seventh circulating pump 38, third shut-off valve 39, compressor 10, condenser 20, expansion valve 40, auxiliary heat source 41, evaporator 37, temperature controller 44, eighth circulating pump 47, fourth shut-off valve 48, fifth shut-off valve 49, sixth shut-off valve 50, and seventh shut-off valve 52 are all assemblies of existing equipment, therefore their specific models and specifications are not detailed here.

[0059] The working principle of this utility model:

[0060] The photovoltaic-thermal dual-source heat pump energy supply system provided by this utility model has the following specific operating states:

[0061] Solar energy supply: in the case of sufficient light conditions, when the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel 1 is greater than 6℃, the PV / T photovoltaic-thermal panel 1 generates direct current and a large amount of low-grade heat by absorbing solar energy, the direct current is converted into alternating current by the photovoltaic inverter 8 and then used by the compressor 10 of the air source heat pump unit 2 and the water source heat pump unit 3, the second circulating pump 29 is connected through the second connecting pipe 14 to the circulating water tank 5 by opening the first three-way valve 13, the first circulating pump 28 is connected to the return water end of the PV / T photovoltaic-thermal panel 1 through the second connecting pipe 12 by opening the first stop valve 32, the third three-way valve 22, the four-way valve 16 and the second three-way valve 51, if the return water temperature of the circulating water tank 5 is greater than the temperature of the heat storage water tank 4, the third circulating pump 30 and the fifth circulating pump 34 are opened, the return water enters the heat storage water tank 4 to store heat in the water tank, and the fourth three-way valve 25 is opened to return to the PV / T photovoltaic-thermal panel 1 through the eighth connecting pipe 21 and the second connecting pipe 12 to continue heating.

[0062] If the temperature of the circulating water tank 5 reaches 45℃ or above, the eighth circulating pump 47 is opened by the temperature controller 44, the sixth stop valve 50 and the seventh stop valve 52 are opened, and the fan coil 46 is used to supply energy to the user; if the temperature of the circulating water tank 5 reaches 35℃-45℃, the eighth circulating pump 47 is opened, the fourth stop valve 48 and the fifth stop valve 49 are opened, and the floor heating coil 45 is used to supply energy to the user; if the temperature of the circulating water tank 5 is lower than 35℃, the solar energy combined with air energy supply mode is used.

[0063] Solar energy combined with air energy supply: in the case of sufficient light conditions, and the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel 1 is less than 6℃, and the return water temperature of the circulating water tank 5 is less than the temperature of the heat storage water tank 4, the fourth three-way valve 25, the second three-way valve 51, the first three-way valve 13 and the third three-way valve 22 are opened, the first circulating pump 28, the fourth circulating pump 33 and the second circulating pump 29 are opened, the four-way valve 16 is opened, the first stop valve 32 is opened, and the air source heat pump unit 2 is connected in parallel with the PV / T photovoltaic-thermal panel 1 to supply heat to the user end (fan coil 46 or floor heating coil 45). If the return water temperature of the circulating water tank 5 is greater than the temperature of the heat storage water tank 4, the third circulating pump 30, the first circulating pump 28 and the fifth circulating pump 34 are opened, the fourth three-way valve 25, the third three-way valve 22 and the second three-way valve 51 are opened, and the heat storage water tank 4 is entered to store heat in the water tank.

[0064] If the temperature of the circulating water tank 5 reaches 45°C and above, the eighth circulating pump 47 is opened by the temperature controller 44, the sixth stop valve 50 and the seventh stop valve 52 are opened, and the fan coil 46 is used to supply energy to the user; if the temperature of the circulating water tank 5 reaches 35-45°C, the eighth circulating pump 47 is opened, the fourth stop valve 48 and the fifth stop valve 49 are opened, and the floor heating coil 45 is used to supply energy to the user; if the temperature of the circulating water tank 5 is lower than 35°C, the solar energy combined with the water source energy supply mode is used.

[0065] Solar energy combined with water source energy supply: under the condition that the light condition is sufficient, the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel 1 is less than 6°C, and the temperature of the circulating water tank 5 reaches the set heating temperature, the second stop valve 36 and the third stop valve 39 are opened, the expansion valve 40 is opened, the second three-way valve 51, the fourth three-way valve 25, the first three-way valve 13 and the third three-way valve 22 are opened, the first circulating pump 28, the third circulating pump 30, the fifth circulating pump 34, the sixth circulating pump 35 and the seventh circulating pump 38 are opened, the four-way valve 16 and the compressor 10 are opened, and the PV / T photovoltaic-thermal panel 1 is connected in series with the water source heat pump unit 3 to supply heat to the user end (fan coil 46 or floor heating coil 45).

[0066] If the temperature of the circulating water tank 5 reaches 45°C and above, the eighth circulating pump 47 is opened by the temperature controller 44, the sixth stop valve 50 and the seventh stop valve 52 are opened, and the fan coil 46 is used to supply energy to the user; if the temperature of the circulating water tank 5 reaches 35-45°C, the eighth circulating pump 47 is opened, the fourth stop valve 48 and the fifth stop valve 49 are opened, and the floor heating coil 45 is used to supply energy to the user; if the temperature of the circulating water tank 5 is lower than 35°C, the solar energy combined with the water source energy supply mode is used.

[0067] Solar energy combined with water source energy supply: under the condition that the light condition is sufficient, the difference between the outlet water temperature and the return water temperature of the PV / T photovoltaic-thermal panel 1 is less than 6°C, and the temperature of the circulating water tank 5 reaches the set heating temperature, the second stop valve 36 and the third stop valve 39 are opened, the expansion valve 40 is opened, the second three-way valve 51, the fourth three-way valve 25, the first three-way valve 13 and the third three-way valve 22 are opened, the first circulating pump 28, the fourth circulating pump 33, the third circulating pump 30, the fifth circulating pump 34, the sixth circulating pump 35 and the seventh circulating pump 38 are opened, the four-way valve 16 and the compressor 10 are opened, and the PV / T photovoltaic-thermal panel 1 is connected in series with the water source heat pump unit 3 to supply heat to the user end (fan coil 46 or floor heating coil 45).

[0068] If the temperature of the circulating water tank 5 reaches 45℃ or above, the eighth circulating pump 47, the sixth stop valve 50 and the seventh stop valve 52 are opened by the temperature controller 44, and the fan-coil 46 is used to supply energy to the users; if the temperature of the circulating water tank 5 reaches 35℃-45℃, the eighth circulating pump 47 is opened, the fourth stop valve 48 and the fifth stop valve 49 are opened, and the floor heating coil 45 is used to supply energy to the users.

Claims

1. A photovoltaic photothermal-dual source heat pump powered system, characterized in that: The utility model relates to a PV / T photovoltaic and photo-thermal panel, air source heat pump unit, water source heat pump unit, heat storage water tank and circulating water tank, wherein the PV / T photovoltaic and photo-thermal panel is connected with the air source heat pump unit, heat storage water tank and circulating water tank through the circulating pipeline composed of several connecting pipes, several communication valves and several circulating pumps, the heat storage water tank is connected with the water source heat pump unit through the first circulating pipeline, and the circulating water tank is connected with the water source heat pump unit through the second circulating pipeline.

2. The photovoltaic, photothermal-dual source heat pump powered system according to claim 1, wherein: The PV / T photovoltaic and photo-thermal panel is further connected with a photovoltaic and inverter integrated machine, one end of the photovoltaic and inverter integrated machine is connected with an external power grid, and the photovoltaic and inverter integrated machine is further connected with the compressor arranged in the air source heat pump unit and the water source heat pump unit.

3. The photovoltaic, photothermic - dual source heat pump powered system of claim 1, wherein: The upper and lower ends of the PV / T photovoltaic and photo-thermal panel are respectively provided with a first connecting pipe and a second connecting pipe, the rear end of the first connecting pipe is provided with a first three-way valve, the other two ends of the first three-way valve are respectively connected with a third connecting pipe and a fourth connecting pipe, the other end of the third connecting pipe is connected with the circulating water tank, the rear end of the fourth connecting pipe is connected with a four-way valve, the other three ends of the four-way valve are respectively connected with a fifth connecting pipe, a sixth connecting pipe and a seventh connecting pipe, the other end of the fifth connecting pipe is connected with a condenser arranged in the air source heat pump unit, the other end of the sixth connecting pipe is connected with a second three-way valve, the other two ends of the second three-way valve are respectively connected with the second connecting pipe and an eighth connecting pipe, the other end of the seventh connecting pipe is connected with a third three-way valve, the other two ends of the third three-way valve are respectively connected with a ninth connecting pipe and a tenth connecting pipe, the other end of the ninth connecting pipe is connected with the heat storage water tank, the other end of the tenth connecting pipe is connected with the circulating water tank, the other end of the eighth connecting pipe is connected with a fourth three-way valve, the other two ends of the fourth three-way valve are respectively connected with an eleventh connecting pipe and a twelfth connecting pipe, the other end of the eleventh connecting pipe is connected with the condenser arranged in the air source heat pump unit, and the other end of the twelfth connecting pipe is connected with the heat storage water tank.

4. The photovoltaic, photothermal-dual source heat pump powered system of claim 3, wherein: The first circulating pump is arranged on the second connecting pipe, the second circulating pump is arranged on the third connecting pipe, the third circulating pump is arranged on the ninth connecting pipe, the first pressure tank and the first stop valve are arranged on the tenth connecting pipe, the fourth circulating pump is arranged on the eleventh connecting pipe, and the fifth circulating pump is arranged on the twelfth connecting pipe.

5. The photovoltaic, photothermal-dual source heat pump powered system of claim 1, wherein: The sixth circulating pump and the second stop valve are arranged on the first circulating pipeline connected between the heat storage water tank and the water source heat pump unit, and the first circulating pipeline is connected with an evaporator arranged in the water source heat pump unit.

6. The photovoltaic, photothermal-dual source heat pump powered system of claim 1, wherein: The seventh circulating pump and the third stop valve are arranged on the second circulating pipeline connected between the circulating water tank and the water source heat pump unit, and the second circulating pipeline is connected with the condenser arranged in the water source heat pump unit.

7. The photovoltaic, photothermal-dual source heat pump powered system of claim 1, wherein: The compressor, the condenser, the expansion valve, the auxiliary heat source and the evaporator are arranged in the air source heat pump unit and are sequentially connected through the third circulating pipeline.

8. The photovoltaic, photothermal-dual source heat pump powered system of claim 1, wherein: The evaporator, the expansion valve, the condenser and the compressor are arranged in the water source heat pump unit and are connected through the fourth circulating pipeline.

9. The photovoltaic, photothermal-dual source heat pump powered system of claim 1, wherein: The circulating water tank is connected with a temperature controller, and is connected with a floor heating coil and a fan coil respectively through pipelines. An eighth circulating pump, a fourth stop valve, a fifth stop valve, a sixth stop valve and a seventh stop valve are assembled on the connecting pipelines.

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