Three-energy coupled comprehensive energy quadruple supply system

Abstract

The utility model discloses a three-energy-coupled comprehensive energy quadruple supply system which solves the technical problems that an existing absorption heat pump system is large in energy consumption and poor in applicability. The system comprises a solar photovoltaic waste heat system connected with a power supply system, a domestic hot water heat pump unit, a ground source heat pump unit and an air source heat pump unit, a plurality of cold and heat sources are directly or indirectly connected with a user terminal or a domestic water tank along a heat conveying pipeline, and a valve assembly and a water pump assembly are arranged on the pipeline. The electric energy generated by the PV / T assembly can be used by power consumption equipment of the system, the system can operate normally during abnormal power failure, waste heat generated by power generation can serve as a low-temperature heat source of other heat pump units or be stored in soil to solve the problem of soil cold and heat imbalance, the solar energy utilization rate is increased, and energy conservation and emission reduction are achieved. Different modes are switched according to the external environment and needs so as to achieve low-energy-consumption heating, cooling, power supply and domestic hot water supply, applicability is high, energy consumption is low, and carbon emission is zero.

Description

Technical Field

[0001] This utility model relates to the field of clean energy utilization technology, and in particular to a three-energy coupled integrated four-energy supply system. Background Technology

[0002] Chinese invention patent CN 103604248 B, with an authorization announcement date of January 13, 2016, discloses a three-purpose ground source absorption heat pump system and its operation method. The system includes an absorption heat pump, a buried pipe, a domestic hot water tank, a plate heat exchanger, a switching pump, and multiple valves. The method combines a fuel combustion heating system with a ground source absorption heat pump, and adds a heat recovery loop and a switching device to provide heating in winter, air conditioning in summer, and domestic hot water year-round. Depending on the load characteristics of different seasons and demands, various operating modes can be achieved through switching. While cooling in summer, the heat discharged from the absorber and / or condenser is recovered for the production of domestic hot water. Compared to traditional electric heat pumps, absorption heat pumps extract less heat from the soil during heating and discharge more heat to the soil during cooling. The demand for domestic hot water year-round can further increase the heat extraction, and summer heat recovery can further reduce the heat discharge. Therefore, it can effectively reduce the annual heat imbalance rate, improve the primary energy efficiency of traditional systems, and maintain stable and reliable heating and air conditioning performance year-round.

[0003] However, the above system still has the following problems: First, the overall energy efficiency is not high. The fuel combustion heating system will cause a large amount of energy consumption and environmental pollution. Second, there are few operable functional modes, which cannot meet the heating or cooling needs under various conditions. Third, it requires additional power supply, which increases energy consumption. If there is an abnormal power outage, the system will be paralyzed. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a three-energy coupled integrated four-energy supply system, which solves the technical problems of high energy consumption and poor applicability of existing absorption heat pump systems.

[0005] The technical solution of this application is as follows:

[0006] A three-energy coupled integrated four-source heat pump system includes a solar photovoltaic waste heat system for cold and heat sources, a domestic hot water heat pump unit, a ground source heat pump unit, and an air source heat pump unit. Several of the cold and heat sources are connected to the user terminal or domestic water tank along heat transport pipelines, or several of the cold and heat sources are connected to a buried pipe heat exchanger or heat exchanger or thermal storage tank along heat transport pipelines before being connected to the user terminal or domestic water tank. The pipelines are equipped with valve assemblies and water pump assemblies. The solar photovoltaic waste heat system is also connected to a power supply system.

[0007] Preferably, the solar photovoltaic waste heat system includes PV / T modules, which are connected in parallel to a domestic hot water heat pump unit, a ground source heat pump unit, an air source heat pump unit, a buried pipe heat exchanger, and a heat exchanger via a heat collection tank.

[0008] Preferably, the ground source heat pump unit includes an evaporator two connected to a heat collection tank, and the evaporator two is connected in parallel with a condenser two via a throttling valve two and a compressor two, respectively. The condenser two is connected to the user terminal.

[0009] Preferably, a four-way reversing valve is provided between the evaporator and the condenser.

[0010] Preferably, the air source heat pump unit includes an evaporator three, which is connected in parallel with a condenser three via a throttling valve three and a compressor three, and the condenser three is connected to the user terminal.

[0011] Preferably, a four-way reversing valve is provided between the evaporator three and the condenser three.

[0012] Preferably, the domestic hot water heat pump unit includes an evaporator connected to a heat collection tank, and the evaporator is connected in parallel with a condenser via a throttling valve and a compressor. The condenser is connected to the domestic water tank.

[0013] Preferably, the heat collection tank is connected to the domestic water tank through the heat exchanger.

[0014] Preferably, the air source heat pump unit is connected in sequence to the heat storage tank, the domestic hot water heat pump unit, and the domestic water tank.

[0015] Preferably, the power supply system includes an inverter, a battery, and a power grid connected in sequence to the PV / T module. The battery is connected to a domestic hot water heat pump unit, a ground source heat pump unit, an air source heat pump unit, and a water pump assembly for conveying cold or hot water as a heat transfer medium.

[0016] Compared with the prior art, the technical solution disclosed in this utility model has the following beneficial effects:

[0017] 1. The system of this utility model mainly consists of a solar photovoltaic waste heat system, a ground source heat pump unit, an air source heat pump unit, a domestic hot water heat pump unit, a buried pipe heat exchanger, a heat exchanger, a user terminal, a water pump, valves, and connections; the waste heat generated by the PV / T module can be used as a low-temperature heat source for the ground source heat pump unit and the domestic hot water heat pump unit, or it can be stored in the soil to solve the problem of soil thermal imbalance, while improving the utilization rate of solar energy;

[0018] 2. The PV / T module can directly supply the generated electricity to the heat pump, water pump and other power-consuming equipment of this utility model. It ensures that the system of this utility model can operate normally in the event of an abnormal power outage. Moreover, it is connected to the power grid. During the non-heating season, the excess electricity generated can also be sold to the grid, realizing the full utilization of clean energy.

[0019] 3. The system of this utility model has multiple operating modes. Through different control strategies, it can achieve a stable supply of heating, cooling, power and domestic hot water. According to the external environment and needs, the operating mode with the lowest energy consumption can be selected adaptively. It has strong applicability and low energy consumption, providing a way for the comprehensive and efficient utilization of solar energy, geothermal energy and air energy, and achieving zero carbon emissions. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the overall working principle of this utility model;

[0022] Figure 2 This utility model relates to a PV / T-soil source heat pump heating mode;

[0023] Figure 3 This utility model relates to a buried pipe-soil source heat pump heating mode;

[0024] Figure 4 This utility model relates to an air source heat pump heating mode;

[0025] Figure 5 This utility model relates to a PV / T-buried pipe-soil source heat pump combined with an air source heat pump heating mode.

[0026] Figure 6 This utility model relates to a PV / T-soil source heat pump combined with an air source heat pump heating mode;

[0027] Figure 7 This utility model relates to a combined underground pipe-soil source heat pump and air source heat pump heating / cooling mode;

[0028] Figure 8 This utility model relates to a PV / T-type domestic hot water heat pump for supplying domestic hot water.

[0029] Figure 9 This utility model relates to a PV / T heat exchanger for supplying domestic hot water.

[0030] Figure 10 This utility model relates to an air source heat pump-domestic hot water heat pump mode for supplying domestic hot water.

[0031] Figure 11 This is the PV / T soil heating mode of this utility model;

[0032] Figure 12 This is the power generation mode of this utility model.

[0033] Explanation of icon numbers:

[0034] 1. Solar photovoltaic waste heat system, 101 PV / T modules; 2. Domestic hot water heat pump unit, 201 Evaporator I, 202 Compressor I, 203 Condenser I, 204 Throttling valve I; 3. Ground source heat pump unit, 301 Evaporator II, 302 Compressor II, 303 Condenser II, 304 Throttling valve II, 305 Four-way reversing valve I; 4. Air source heat pump unit, 401 Evaporator III, 402 Compressor III, 403 Condenser III, 404 Throttling valve III, 405 Four-way reversing valve II; 5. Buried pipe heat exchanger; 6. Heat exchanger; 7. User terminal; 8. Power supply system, 801 Electricity meter, 802 Inverter, 803 Power grid; 9. Valve assembly, 901 Valve I, 902 Valve II; 9. 03 Valve III, 904 Valve IV, 905 Valve V, 906 Valve VI, 907 Valve VII, 908 Valve VIII, 909 Valve IX, 910 Valve X, 911 Valve XI, 912 Valve XII, 913 Valve XIII, 914 Valve XIV, 915 Valve XV, 916 Valve XVI, 917 Valve XVII, 918 Valve XVIII, 919 Valve XIX, 10 Water Pump Assembly, 1001 Water Pump I, 1002 Water Pump II, 1003 Water Pump III, 1004 Water Pump IV, 1005 Water Pump V, 1006 Water Pump VI, 1007 Water Pump VII, 1101 Solar Collector Tank, 1102 Domestic Water Tank, 1103 Thermal Storage Tank. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] Example 1: A three-energy coupled integrated four-source heat pump system includes a solar photovoltaic waste heat system 1 (cold and hot source), a domestic hot water heat pump unit 2, a ground source heat pump unit 3, and an air source heat pump unit 4. Several of the cold and hot sources are connected to the user terminal 7 or the domestic water tank 1102 along heat transport pipelines, or several of the cold and hot sources are connected to the buried pipe heat exchanger 5 or heat exchanger 6 or heat storage tank 1103 along heat transport pipelines and then connected to the user terminal 7 or the domestic water tank 1102. The pipelines are equipped with valve assemblies 9 and water pump assemblies 10. The solar photovoltaic waste heat system 1 is also connected to a power supply system 8.

[0037] Specifically, such as Figure 1 As shown, the solar photovoltaic waste heat system 1 includes a PV / T module 101 and a collector tank 1101 connected by valve 901 and water pump 1001. The domestic hot water heat pump unit 2 includes an evaporator 201 and a condenser 203 connected by a throttle valve 204 and a compressor 202. The ground source heat pump unit 3 includes an evaporator 301 and a condenser 303 connected by a throttle valve 304, a compressor 302 connected in series, and a four-way reversing valve 305. The air source heat pump unit 4 includes an evaporator 401 and a condenser 403 connected by a throttle valve 404, a compressor 402 connected in series, and a four-way reversing valve 405. The power supply system 8 includes an electricity meter 801 connected to the PV / T module 101, and the electricity meter 801 is connected in sequence to an inverter 802 and a power grid 803. The solar photovoltaic waste heat system 1 generates electricity that can power various heat pump units, water pumps, and other power-consuming equipment within the system. The solar photovoltaic waste heat system 1, the domestic hot water heat pump unit 2, the ground source heat pump unit 3, the air source heat pump unit 4, and the buried pipe heat exchanger 5 or heat exchanger 6 provide stable heating, cooling, or domestic hot water to the user terminal 7.

[0038] The system uses water as a heat transfer medium to deliver hot water, heating, or cooling to the user terminal 7 through various heat pump units, the solar photovoltaic waste heat system 1, and the pipelines. The solar photovoltaic waste heat system 1 can generate electricity and also serve as a heat source and cold source. The waste heat generated by the PV / T module 101 can be used as a low-temperature heat source for the ground source heat pump unit 3 and the domestic hot water heat pump unit 2, or it can be stored in the soil to solve the problem of soil thermal imbalance, while improving the utilization rate of solar energy. The system has multiple operating modes and can achieve a stable supply of heating, cooling, power and domestic hot water through different control methods, providing a way for the comprehensive and efficient utilization of solar energy, geothermal energy and air energy, and achieving zero carbon emissions.

[0039] Example 2, based on Example 1, describes the working method of the integrated four-energy system with three coupled energy sources as follows:

[0040] The operating methods include PV / T-soil source heat pump heating mode, buried pipe-soil source heat pump heating mode, buried pipe-soil source heat pump cooling mode, air source heat pump heating mode, air source heat pump cooling mode, PV / T-domestic hot water heat pump domestic hot water supply mode, PV / T-heat exchanger domestic hot water supply mode, air source heat pump-domestic hot water heat pump domestic hot water supply mode, PV / T soil supplementary heating mode, and power generation mode. Each heating mode can operate independently or in parallel, and each cooling mode can operate independently or in parallel. This embodiment provides multiple operating modes that can stably provide heating, cooling, power, and domestic hot water, suitable for various external environments and user end needs. The most suitable operating mode can be selected according to the external ambient temperature or sunlight intensity to reduce the energy consumption of the system.

[0041] Specifically, the energy usage priority is solar energy, air source, and soil source in that order. When heating, solar energy is used first. When solar energy is insufficient, air source heat pump unit 4 is started first, and ground pipe heat exchanger 5 is used last. When cooling, air source heat pump unit 4 is started first. When the outdoor temperature is high, ground pipe heat exchanger 5 is used. When supplying domestic hot water, solar energy is used first. When solar energy is insufficient, air source heat pump unit 4 is used.

[0042] Based on the above implementation, this embodiment provides an implementation of the PV / T-soil source heat pump heating mode. The PV / T-soil source heat pump heating mode includes a solar photovoltaic waste heat system 1, a ground source heat pump unit 3, and a user terminal 7 connected sequentially along the pipeline. The solar photovoltaic waste heat system 1 includes a heat collection tank 1101 connected in parallel with the PV / T module 101. The heat collection tank 1101 is connected to the evaporator 301 of the ground source heat pump unit 3 through several valves and a water pump 1005. The ground source heat pump unit 3 also includes a condenser 303 connected in parallel with the evaporator 301 through a throttle valve 304, a compressor 302 connected in series, and a four-way reversing valve 305. The condenser 303 is connected to the user terminal 7 through several valves and a water pump 1006.

[0043] Specifically, the PV / T-soil source heat pump heating mode operates when solar irradiance is high during the heating season, and when the temperature of the collector tank 1101 is greater than 10℃, such as Figure 2As shown, the heat collection tank 1101 is connected to the evaporator 301 of the ground source heat pump unit 3 via valves 2 902, 3 903, 12 912, 5 1005 and 13 913 connected in series, and valves 6 906, 10 910, 15 915 and 16 916 connected in series. The ground source heat pump unit 3 also includes a condenser 303 connected in parallel with the evaporator 301 via throttle valve 2 304, compressor 2 302 connected in series and four-way reversing valve 1 305. The condenser 2 303 is connected to the user terminal 7 via valve 14 914, valve 17 917 connected in series and water pump 6 1006.

[0044] Based on the above implementation, this embodiment provides an implementation of a buried pipe-soil source heat pump heating mode. The buried pipe-soil source heat pump heating mode includes a buried pipe heat exchanger 5, a ground source heat pump unit 3, and a user terminal 7 connected sequentially along the pipeline. The buried pipe heat exchanger 5 is connected to the evaporator 301 of the ground source heat pump unit 3 via several valves and a water pump 1005. The evaporator 301 is connected to the user terminal 7 via a parallel condenser 303. The buried pipe-soil source heat pump heating mode and the buried pipe-soil source heat pump cooling mode are switched via a four-way reversing valve 305. The buried pipe-soil source heat pump heating mode can operate at any time during the heating and cooling seasons. The soil source heat pump exchanges heat through the buried pipe, utilizing the stable temperature within the soil to provide heating or cooling to the user terminal 7, resulting in higher energy efficiency and lower operating costs.

[0045] Specifically, such as Figure 3 As shown, the buried pipe heat exchanger 5 is connected to the evaporator 301 of the ground source heat pump unit 3 via valves 11 (911), 12 (912), 5 (1005), 13 (913), 15 (915), and 16 (916) connected in series. The ground source heat pump unit 3 also includes a condenser 303 connected in parallel with the evaporator 301 via a throttle valve 304, a compressor 302 connected in series, and a four-way reversing valve 305. The condenser 303 is connected to the user terminal 7 via valve 14 (914), 17 (917) connected in series, and 6 (1006). The buried pipe-soil source heat pump heating mode and the buried pipe-soil source heat pump cooling mode are switched via the four-way reversing valve 305.

[0046] Based on the above implementation, this embodiment provides an implementation of an air source heat pump heating mode. The air source heat pump heating mode includes an air source heat pump unit 4. The air source heat pump unit 4 includes an evaporator 401 and a condenser 403 connected in parallel via a throttling valve 404, a compressor 402 connected in series, and a four-way reversing valve 405. The condenser 403 is connected to the user terminal 7 via several valves and a water pump 1006. The air source heat pump heating mode and the air source heat pump cooling mode are switched via the four-way reversing valve 405. The air source heat pump heating mode operates when the temperature of the heat collection tank 1101 is less than 10°C and the average outdoor temperature is higher than 3°C during the heating season. During the cooling season, the air source heat pump cooling mode operates when the average outdoor temperature is lower than 32°C.

[0047] Specifically, such as Figure 4 As shown, the air source heat pump unit 4 includes an evaporator 401 and a condenser 403 connected in parallel via a throttle valve 404, a compressor 402 connected in series, and a four-way reversing valve 405. The condenser 403 is connected to the user terminal 7 via valves 918 and 914 connected in series, valves 919 and 917 connected in series, and a water pump 1006. The air source heat pump heating mode and the air source heat pump cooling mode are switched via the four-way reversing valve 405.

[0048] Based on the above implementation, this embodiment provides an implementation of a PV / T-domestic hot water heat pump supply mode. The PV / T-domestic hot water heat pump supply mode includes a solar photovoltaic waste heat system 1, a domestic hot water heat pump unit 2, and a domestic water tank 1102 connected sequentially along the pipeline. The collector tank 1101 is connected to the evaporator 201 of the domestic hot water heat pump unit 2 via several valves and a water pump 1003. The domestic hot water heat pump unit 2 also includes a condenser 203 connected in parallel with the evaporator 201 via a throttling valve 204 and a compressor 202. The condenser 203 is connected to the domestic water tank 1102 via several valves and a water pump 1004. The PV / T-domestic hot water heat pump supply mode can operate throughout the year when solar irradiance is high, and the water temperature in the collector tank 1101 must be greater than 10℃ and less than 45℃. The PV / T component 101 continuously stores heat into the heat collection tank. When the water temperature in the heat collection tank 1101 is greater than 10℃ and less than 45℃, by opening several valves and water pump 3 1003 between the heat collection tank 1101 and the domestic hot water heat pump unit 2, the domestic hot water heat pump unit 2 stores domestic hot water in the domestic water tank 1102 for use.

[0049] Specifically, such as Figure 8As shown, when the temperature of the heat collection tank 1101 is greater than 10℃ and less than 45℃, the heat collection tank 1101 is connected to the evaporator 201 of the domestic hot water heat pump unit 2 through valves 2 902, 3 903, 4 904 and water pump 3 1003 connected in series, and valves 6 906, 7 907 and 8 908 connected in series. The domestic hot water heat pump unit 2 also includes a condenser 203 connected in parallel with the evaporator 201 through throttle valve 204 and compressor 202. The condenser 203 is connected to the domestic water tank 1102 through valve 5 905, valve 9 909 connected in series and water pump 4 1004.

[0050] Based on the above implementation method, this embodiment provides an implementation method for a PV / T-heat exchanger-based domestic hot water supply mode. This PV / T-heat exchanger-based domestic hot water supply mode includes a solar photovoltaic waste heat system 1, a heat exchanger 6, and a domestic water tank 1102 connected sequentially along the pipeline. The heat exchanger 6 is connected to the heat exchanger 6 via several valves and a second water pump 1002, and the heat exchanger 6 is connected to the domestic water tank 1102 via several valves and a fourth water pump 1004. The PV / T-heat exchanger-based domestic hot water supply mode operates during the non-heating season when solar irradiance is high, and the water temperature in the heat exchanger tank needs to be greater than 45℃. The PV / T module 101 continuously stores heat in the heat collection tank 1101. When the water temperature in the heat collection tank 1101 is greater than 45°C, by opening several valves between the heat collection tank 1101 and the heat exchanger 6, and between the heat exchanger 6 and the domestic water tank 1102, as well as water pump 2 1002 and water pump 4 1004, the heat exchanger 6 stores domestic hot water in the domestic water tank 1102 for use.

[0051] Specifically, such as Figure 9 As shown, when the temperature of the heat collection tank 1101 is greater than 45℃, the heat collection tank 1101 is connected in parallel with the heat exchanger 6 through valve 2 902 and water pump 2 1002 connected in series, and valve 6 906, valve 7 907 and valve 8 connected in series. The heat exchanger 6 is connected to the domestic water tank 1102 through valve 5 905, valve 9 909 connected in series and water pump 4 1004.

[0052] Based on the above implementation, this embodiment provides an implementation of an air source heat pump-domestic hot water supply mode. The air source heat pump-domestic hot water supply mode includes an air source heat pump unit 4, a heat storage tank 1103, a domestic hot water heat pump unit 2, and a domestic water tank 1102 connected sequentially along the pipeline. A condenser 403 is connected to the heat storage tank 1103 through several valves and a water pump 1007. The heat storage tank 1103 is connected to the evaporator 201 through several valves and a water pump 1003. The condenser 203, which is connected in parallel with the evaporator 201, is connected to the domestic water tank 1102 through several valves and a water pump 1004. In the domestic hot water supply mode of the air source heat pump-domestic hot water heat pump, when the solar heat is insufficient or the solar irradiance is low on cloudy or rainy days during the heating season, and the water temperature in the collector tank 1101 is less than 10°C, the air source heat pump unit 4 produces hot water at a certain temperature and stores it in the heat storage tank 1103 as a low-temperature heat source for the domestic hot water heat pump unit 2 to produce domestic hot water.

[0053] Specifically, such as Figure 10 As shown, condenser 3 403 is connected to heat storage tank 1103 via valve 18 918, valve 19 919 connected in series and water pump 7 1007. Heat storage tank 1103 is connected to evaporator 1 201 of domestic hot water heat pump unit 2 via valve 4 904 connected in series and water pump 3 1003, valve 7 907 connected in series and valve 8 908. Evaporator 1 201 is connected in parallel with condenser 1 203 via throttle valve 1 204 and compressor 1 202. Condenser 1 203 is connected to domestic water tank 1102 via valve 5 905, valve 9 909 connected in series and water pump 4 1004.

[0054] Based on the above implementation methods, this embodiment provides an implementation method for a PV / T soil heating mode. The PV / T soil heating mode includes a solar photovoltaic waste heat system 1 connected to a buried pipe heat exchanger 5 via several valves and a water pump 1005. The PV / T soil heating mode operates during the non-heating season. The PV / T module 101 continuously stores heat in the heat collection tank 1101. When the required temperature is reached, the valves and water pump 1005 are opened to supplement heat to the soil through the buried pipe heat exchanger 5.

[0055] Specifically, such as Figure 11 As shown, the heat collection tank 1101 is connected to the buried pipe heat exchanger 5 via valves 2 902, 3 903, 12 912, 5 1005, 13 913, 16 916, 15 915, 6 906, 10 910, and 11 911 connected in series.

[0056] Based on the above implementation methods, this embodiment provides an implementation method for the power generation mode, which includes a grid-connected photovoltaic power generation mode and an off-grid photovoltaic power generation mode. In the grid-connected photovoltaic power generation mode, the PV / T module 101 is connected to the power grid 803 of the power supply system 8. The power grid 803 is connected to the water pump module 10, the domestic hot water heat pump unit 2, the ground source heat pump unit 3, and the air source heat pump unit 4, respectively. In the off-grid photovoltaic power generation mode, the PV / T module 101 is connected to the water pump module 10, the domestic hot water heat pump unit 2, the ground source heat pump unit 3, and the air source heat pump unit 4, respectively.

[0057] Specifically, such as Figure 12 As shown, the grid-connected photovoltaic (PV) power generation mode collects the electricity generated by the PV / T module 101 to the power grid 803, and then draws power from the power grid 803 to supply various heat pump units, water pumps, and other power-consuming equipment. The off-grid PV power generation mode directly supplies the electricity generated by the PV / T module 101 to heat pumps, water pumps, and other power-consuming equipment. The grid-connected PV power generation mode is mainly used during the non-heating season, and the excess electricity generated can be sold to the grid. The off-grid PV power generation mode is mainly used during the heating season, and the electricity generated is mainly used to supply heat pumps, water pumps, and other power-consuming equipment.

[0058] Example 3: Based on the above examples, this example provides three combined heating modes and three combined cooling modes for the integrated four-energy system with three-energy coupling. Specifically, the three combined heating modes are: PV / T-buried pipe-soil source heat pump combined with air source heat pump heating mode, PV / T-soil source heat pump combined with air source heat pump heating mode, and buried pipe-soil source heat pump combined with air source heat pump heating mode. Each combined heating mode can be switched to cooling mode by adjusting the four-way reversing valve in the heat pump unit.

[0059] To reduce energy consumption and increase heating stability, when the outlet water temperature of the solar photovoltaic waste heat system 1 is higher than that of the buried pipe heat exchanger 5, both the solar photovoltaic waste heat system 1 and the buried pipe heat exchanger 5 are used as heat sources, operating in a PV / T-buried pipe-ground source heat pump combined with air source heat pump heating mode. When the outlet water temperature of the solar photovoltaic waste heat system 1 is lower than or equal to that of the buried pipe heat exchanger 5, the solar photovoltaic waste heat system 1 is combined with the air source heat pump unit 4 as a heat source, operating in a PV / T-ground source heat pump combined with air source heat pump heating mode. When the outlet water temperature of the solar photovoltaic waste heat system 1 is lower than that of the buried pipe heat exchanger 5, the buried pipe heat exchanger 5 is combined with the air source heat pump unit 4 as a heat source, operating in a buried pipe-ground source heat pump combined with air source heat pump heating mode.

[0060] The PV / T-buried pipe-soil source heat pump combined with air source heat pump heating mode, such as Figure 5As shown, the system includes a solar photovoltaic waste heat system 1, a ground source heat pump unit 3, an air source heat pump unit 4, a buried pipe heat exchanger 5, and a user terminal 7, connected sequentially along a heat transfer pipeline. The PV / T module 101 is connected to the heat collection tank 1101 via valve 1 901 and water pump 1001. When the water temperature in the heat collection tank 1101 reaches a certain temperature, it is connected to the buried pipe heat exchanger 5 via valves 2 902, 3 903, 12 912, 11 911, 6 906, 10 910, and 15 915, which are connected in series. The buried pipe heat exchanger 5 is connected to the evaporator 301 of the ground source heat pump unit 3 via valves 11-911, 12-912, 5-1005, 13-913, 15-915, and 16-916 connected in series. The condenser 303 of the ground source heat pump unit 3 is connected to the condenser 403 of the air source heat pump unit 4 via valves 14-914, 18-918, 17-917, and 19-919 connected in series. Then, it is connected to the user terminal 7 via water pump 6-1006.

[0061] The PV / T-soil source heat pump combined with air source heat pump heating mode, such as Figure 6 As shown, the system includes a solar photovoltaic waste heat system 1, a ground source heat pump unit 3, an air source heat pump unit 4, and a user terminal 7 connected sequentially along a heat transfer pipeline. The PV / T module 101 is connected to the heat collection tank 1101 via valve 1 901 and water pump 1001. When the water temperature in the heat collection tank 1101 reaches a certain temperature, it is connected to the evaporator 2 301 of the ground source heat pump unit 3 via valves 2 902, 3 903, 12 912, 5 1005, and 13 913 connected in series, and valves 6 906, 10 910, 15 915, and 16 916 connected in series. The ground source heat pump unit 3 and the air source heat pump unit 4 are connected in parallel and then connected to the user terminal 7 via water pump 6 1006.

[0062] The underground pipe-soil source heat pump combined with air source heat pump heating mode, such as Figure 7 As shown, the system includes a ground source heat pump unit 3, an air source heat pump unit 4, a buried pipe heat exchanger 5, and a user terminal 7 connected in sequence along a heat transfer pipeline. The buried pipe heat exchanger 5 is connected to the evaporator 301 of the ground source heat pump unit 3 via valves 11-911, 12-912, 5-1005, 13-913, 15-915, and 16-916 connected in sequence. The condenser 303 of the ground source heat pump unit 3 is connected to the condenser 403 of the air source heat pump unit 4 via valves 14-914, 18-918, 17-917, and 19-919 connected in sequence, and then connected to the user terminal 7 via water pump 6-1006.

[0063] In summary, this utility model adapts the connection methods of various heat sources and heat exchangers to the external ambient temperature and the intensity of solar radiation, thereby achieving stable power supply, heating, cooling and domestic hot water supply, reducing energy consumption, making full use of clean energy, avoiding environmental pollution, and realizing the comprehensive and efficient utilization of solar energy, geothermal energy and air energy.

[0064] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0065] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A three-energy coupled integrated four-energy system, characterized in that: The system includes a solar photovoltaic waste heat system (1) with cold and heat sources, a domestic hot water heat pump unit (2), a ground source heat pump unit (3) and an air source heat pump unit (4). Several cold and heat sources are connected to the user terminal (7) or domestic water tank (1102) along the heat transmission pipeline, or several cold and heat sources are connected to the buried pipe heat exchanger (5) or heat exchanger (6) or heat storage tank (1103) along the heat transmission pipeline and then connected to the user terminal (7) or domestic water tank (1102). The pipeline is equipped with valve assembly (9) and water pump assembly (10). The solar photovoltaic waste heat system (1) is also connected to a power supply system (8).

2. The integrated four-energy system with three-energy coupling as described in claim 1, characterized in that: The solar photovoltaic waste heat system (1) includes a PV / T module (101), which is connected in parallel to a domestic hot water heat pump unit (2), a ground source heat pump unit (3), an air source heat pump unit (4), a buried pipe heat exchanger (5), and a heat exchanger (6) via a heat collection tank (1101).

3. The integrated four-energy system with three-energy coupling as described in claim 2, characterized in that: The ground source heat pump unit (3) includes an evaporator (301) connected to a heat collection tank (1101). The evaporator (301) is connected in parallel with a condenser (303) via a throttle valve (304) and a compressor (302). The condenser (303) is connected to the user terminal (7).

4. The integrated four-energy system with three-energy coupling as described in claim 3, characterized in that: A four-way reversing valve (305) is provided between the evaporator (301) and the condenser (303).

5. The integrated four-energy system with three-energy coupling according to claim 3, characterized in that: The air source heat pump unit (4) includes an evaporator (401), which is connected in parallel with a condenser (403) via a throttle valve (404) and a compressor (402). The condenser (403) is connected to the user terminal (7).

6. The integrated four-energy system with three-energy coupling according to claim 5, characterized in that: A four-way reversing valve (405) is provided between the evaporator three (401) and the condenser three (403).

7. The integrated four-energy system with three-energy coupling according to claim 5, characterized in that: The domestic hot water heat pump unit (2) includes an evaporator (201) connected to the heat collection tank (1101). The evaporator (201) is connected to a condenser (203) in parallel through a throttle valve (204) and a compressor (202). The condenser (203) is connected to the domestic water tank (1102).

8. The integrated four-energy system with three-energy coupling according to claim 7, characterized in that: The heat collection tank (1101) is connected to the domestic water tank (1102) through the heat exchanger (6).

9. The integrated four-energy system with three-energy coupling according to claim 8, characterized in that: The air source heat pump unit (4) is connected in sequence to the heat storage tank (1103), the domestic hot water heat pump unit (2) and the domestic water tank (1102).

10. The integrated four-energy system with three-energy coupling according to claim 9, characterized in that: The power supply system (8) includes an inverter (801), a storage battery (802) and a power grid (803) connected in sequence to the PV / T component (101). The storage battery (802) is connected to the domestic hot water heat pump unit (2), the ground source heat pump unit (3), the air source heat pump unit (4) and the water pump assembly (10) for conveying cold or hot water as a heat transfer medium.

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