阅读说明：本技术 一种储能式可再生能源利用及空调余热回收系统和方法 (Energy storage type renewable energy utilization and air conditioner waste heat recovery system and method ) 是由 陈晓明 方永林 邱金友 石青林 林晨伟 周威旸 刘晨阳 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种储能式可再生能源利用及空调余热回收的系统和方法。该系统包括空调制冷系统、热泵热水系统、第一储能水箱、第一热管、第二热管、第三热管、温度传感器及控制器；所述空调制冷系统包括第一压缩机、第二储能水箱、风冷冷凝器、第三储能水箱、第一节流装置、第一风冷蒸发器,同时第三储能水箱的制冷剂进口设有第一电动二通阀,制冷剂出口与第一电动二通阀的进口还接有制冷剂旁通管路,旁通管路上设有第二电动二通阀；所述热泵热水系统包括第二压缩机、生活热水水箱、第二节流装置、第二风冷蒸发器；第一储能水箱的出水口通过水管与生活热水水箱的进水口连接；该储能式可再生能源利用及空调余热回收的方法,易于实施,节能效果显著。(The invention relates to a system and a method for energy storage type renewable energy utilization and air conditioner waste heat recovery. The system comprises an air-conditioning refrigeration system, a heat pump hot water system, a first energy storage water tank, a first heat pipe, a second heat pipe, a third heat pipe, a temperature sensor and a controller; the air-conditioning refrigeration system comprises a first compressor, a second energy storage water tank, an air-cooled condenser, a third energy storage water tank, a first throttling device and a first air-cooled evaporator, wherein a refrigerant inlet of the third energy storage water tank is provided with a first electric two-way valve, a refrigerant bypass pipeline is connected between a refrigerant outlet and an inlet of the first electric two-way valve, and a second electric two-way valve is arranged on the bypass pipeline; the heat pump hot water system comprises a second compressor, a domestic hot water tank, a second throttling device and a second air-cooled evaporator; the water outlet of the first energy storage water tank is connected with the water inlet of the domestic hot water tank through a water pipe; the method for utilizing the energy storage type renewable energy and recovering the waste heat of the air conditioner is easy to implement and has obvious energy-saving effect.)

1. A system for utilizing energy storage type renewable energy and recovering waste heat of an air conditioner is characterized by comprising an air conditioner refrigerating system, a heat pump hot water system, a first energy storage water tank (S1), a first heat pipe (P1), a second heat pipe (P2), a third heat pipe (P3), a temperature sensor and a controller;

the air-conditioning refrigeration system comprises a first compressor (1), a second energy storage water tank (S2), an air-cooled condenser (2), a third energy storage water tank (S3), a first throttling device (3) and a first air-cooled evaporator (4); the air-conditioning refrigeration system is characterized in that the first compressor (1), the second energy storage water tank (S2), the air-cooled condenser (2), the third energy storage water tank (S3), the first throttling device (3) and the first air-cooled evaporator (4) are sequentially connected in series through refrigerant pipelines to form an air-conditioning refrigeration cycle, meanwhile, a first electric two-way valve (V1) is arranged at a refrigerant inlet of the third energy storage water tank (S3), and a bypass pipeline (5) is connected between a refrigerant outlet of the third energy storage water tank (S3) and an inlet of the first electric two-way valve (V1); the bypass pipeline (5) is a refrigerant pipeline, and a second electric two-way valve (V2) is arranged on the bypass pipeline;

the heat pump hot water system comprises a second compressor (6), a domestic hot water tank (7), a second throttling device (8) and a second air-cooled evaporator (9); the second compressor (6), the domestic hot water tank (7), the second throttling device (8) and the second air-cooled evaporator (9) are sequentially connected in series through refrigerant pipelines to form a heat pump heating cycle to prepare hot water;

the evaporation section of the first heat pipe (P1) is located outdoors, and the condensation section is located in the water inside the first energy storage water tank (S1); the evaporation section of the second heat pipe (P2) is positioned in the water inside the second energy storage water tank (S2), and the condensation section is positioned in the water inside the first energy storage water tank (S1); the evaporation section of the third heat pipe (P3) is positioned in the water in the third energy storage water tank (S3), and the condensation section is positioned at the air outlet of the second air-cooled evaporator (9);

the first energy storage water tank (S1) comprises a water tank shell and a phase change energy storage module, wherein the shell is provided with a water inlet, a water outlet and a heat pipe inlet, water is filled in the first energy storage water tank, the water outlet is connected with the water inlet of a domestic hot water tank (7) through a water pipe (10) and used for conveying hot water into the domestic hot water tank (7), and the phase change energy storage module is arranged in the water tank shell;

the temperature sensor module comprises a first temperature sensor arranged at an air inlet of the air-cooled condenser (2) and a second temperature sensor arranged in water of a third energy storage water tank (S3), signal output ends of the first temperature sensor and the second temperature sensor are respectively electrically connected with a signal input end of the controller, and the signal output end of the controller is respectively electrically connected with control signal input ends of a first electric two-way valve (V1) and a second electric two-way valve (V2).

2. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery as claimed in claim 1, wherein the second energy storage water tank (S2) and the third energy storage water tank (S3) each comprise a water tank shell, a phase change energy storage module, and a refrigerant pipeline, wherein the water tank shell is provided with a water inlet, a water outlet, a heat pipe inlet, a refrigerant inlet, and a refrigerant outlet, and water is filled in the water tank shell; the phase change energy storage module and the refrigerant pipeline are both arranged in water in the water tank, and two ends of the refrigerant pipeline are respectively connected with the corresponding refrigerant pipelines through the refrigerant inlet and the refrigerant outlet.

3. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery as claimed in claim 1, wherein the first heat pipe (P1), the second heat pipe (P2) and the third heat pipe (P3) are gravity heat pipes, and form an included angle of 30 ~ 45 ℃ with a horizontal plane, so that liquid refrigerant can conveniently flow back to the bottom due to the action of gravity, and the flowing working medium in the gravity heat pipes is refrigerant comprising R410 and R134 a.

4. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery as claimed in claim 1 or 2, wherein the phase change energy storage module is embedded in metal plates by using phase change materials, and the metal plates are parallel to each other to form a water flow channel.

5. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery according to claim 4, wherein the phase change material is inorganic hydrated salt, paraffin or organic-inorganic composite phase change material.

6. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery as claimed in claim 5, wherein the phase change temperature of the phase change material of the first energy storage water tank (S1) is 35 ~ 40 ℃, the phase change temperature of the phase change material of the second energy storage water tank (S2) is 45 ~ 50 ℃, and the phase change temperature of the phase change material of the third energy storage water tank (S3) is 20 ~ 25 ℃.

7. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery according to claim 1 or 2, wherein the water tank shell is a metal shell or a plastic shell; and heat insulation materials are arranged on the periphery of the outer sides of the water tank shell and the heat insulation section of the heat pipe, so that heat is prevented from being dissipated to the environment.

8. The system for energy storage type renewable energy utilization and air conditioner waste heat recovery according to claim 7, wherein the thermal insulation material is polyurethane, polystyrene, glass wool or rubber plastic.

9. A method for energy storage type renewable energy utilization and air conditioner waste heat recovery by using the system of any one of claims 1 to 8, characterized in that the renewable energy utilization and the air conditioner waste heat recovery are carried out according to the following method:

when the solar radiation intensity is high, the refrigerant of the evaporation section of the first heat pipe (P1) absorbs solar radiation and is changed into gaseous refrigerant, the gaseous refrigerant enters the condensation section and is cooled by water in the first energy storage water tank (S1) to be changed into liquid refrigerant, the temperature of the water is increased, the phase change material of the phase change energy storage module in the first energy storage water tank (S1) is heated, the temperature of the phase change material is increased and is melted into the liquid phase change material, solar energy is stored, the liquid refrigerant flows back to the evaporation section again by means of the gravity of the liquid refrigerant to complete a cycle, the process is repeated, and the first energy storage water tank (S1) realizes unpowered solar energy storage;

when the air-conditioning refrigeration system is started, when the air-conditioning refrigeration cycle runs, refrigerant steam at the outlet of the first compressor (1) enters the second energy storage water tank (S2) to be cooled and release heat, the temperature of water rises to heat the phase-change material of the phase-change energy storage module in the water, the temperature of the phase-change material rises to be melted into a liquid phase-change material, and heat is stored;

when the temperature difference between water in the second energy storage water tank (S2) and water in the first energy storage water tank (S1) reaches the working temperature difference of the second heat pipe (P2), the refrigerant in the evaporation section of the second heat pipe (P2) absorbs the heat of the water in the second energy storage water tank (S2) and is changed into gaseous refrigerant, the gaseous refrigerant enters the condensation section, the gaseous refrigerant is cooled by the water in the first energy storage water tank (S1) and is changed into liquid refrigerant, the temperature of the water in the first energy storage water tank (S1) is increased, the phase change material of the phase change energy storage module in the first energy storage water tank (S1) is heated, the temperature of the phase change material is increased and is melted into liquid phase change material, the heat is stored, the liquid refrigerant flows back to the evaporation section of the heat pipe again by depending on the gravity of the liquid refrigerant, the process is repeated, and the first energy storage;

when the hot water provided by the first energy storage water tank (S1) to the domestic hot water tank (7) can meet the temperature requirement, the heat pump hot water system does not need to be started; when the hot water provided by the first energy storage water tank (S1) to the domestic hot water tank (7) cannot meet the temperature requirement, a heat pump hot water system is started to realize the heating circulation of a heat pump and prepare hot water;

when the temperature difference between outdoor air and water in the third energy storage water tank (S3) reaches the working temperature difference of the third heat pipe (P3), the refrigerant in the evaporation section of the third heat pipe (P3) absorbs the heat of the water in the third energy storage water tank (S3) and becomes gaseous refrigerant, the temperature of the water is reduced, the phase-change material in the phase-change energy storage module is cooled, the temperature of the phase-change material is reduced, the phase-change material is solidified into solid phase-change material, cold energy is stored, the gaseous refrigerant enters the condensation section and is cooled by the outdoor air and becomes liquid refrigerant, the liquid refrigerant flows back to the evaporation section of the heat pipe again by means of the gravity of the liquid refrigerant to complete a cycle, the process is repeated, and the third energy storage water tank (S3); meanwhile, when the heat pump hot water system operates, the low-temperature air exhausted by the second air-cooled evaporator (9) cools the gaseous refrigerant at the condensation section of the third heat pipe (P3), and the carried cold energy is stored in the third energy storage water tank (S3);

when the water temperature in the third energy storage water tank (S3) is lower than the outdoor temperature, the first electric two-way valve (V1) is opened, the second electric two-way valve (V2) is closed, the refrigerant coming out of the air-cooled condenser (2) enters the third energy storage water tank (S3) to be cooled and released, the temperature of the refrigerant is further reduced, and the refrigeration cycle efficiency of the air conditioner is improved; otherwise, the first electric two-way valve (V1) is closed, the second electric two-way valve (V2) is opened, and the refrigerant coming out of the air-cooled condenser (2) directly enters the first throttling device (3).

Technical Field

The invention belongs to the technical field of renewable energy utilization and phase change energy storage, and particularly relates to an energy storage type system and method for renewable energy utilization and air conditioner waste heat recovery.

Background

The air source heat pump water heater heats water by absorbing heat in air, the same electric power consumption for heating the hot water is only about 1/4 of an electric water heater, and the air source heat pump water heater has wide attention and application due to high energy efficiency.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, heat is discharged to the environment during the refrigeration cycle of an air conditioner, and energy is wasted due to the fact that heat is absorbed from the environment during the heating cycle of an air source heat pump water heater, and provides a system and a method for utilizing energy storage type renewable energy and recovering waste heat of the air conditioner.

In order to achieve the purpose, the technical scheme of the invention is as follows: a system for utilizing energy storage type renewable energy and recovering waste heat of an air conditioner comprises an air conditioner refrigeration system, a heat pump hot water system, a first energy storage water tank (S1), a first heat pipe (P1), a second heat pipe (P2), a third heat pipe (P3), a temperature sensor and a controller;

the air-conditioning refrigeration system comprises a first compressor (1), a second energy storage water tank (S2), an air-cooled condenser (2), a third energy storage water tank (S3), a first throttling device (3) and a first air-cooled evaporator (4); the air-conditioning refrigeration system is characterized in that the first compressor (1), the second energy storage water tank (S2), the air-cooled condenser (2), the third energy storage water tank (S3), the first throttling device (3) and the first air-cooled evaporator (4) are sequentially connected in series through refrigerant pipelines to form an air-conditioning refrigeration cycle, meanwhile, a first electric two-way valve (V1) is arranged at a refrigerant inlet of the third energy storage water tank (S3), and a bypass pipeline (5) is connected between a refrigerant outlet of the third energy storage water tank (S3) and an inlet of the first electric two-way valve (V1); the bypass pipeline (5) is a refrigerant pipeline, and a second electric two-way valve (V2) is arranged on the bypass pipeline;

the heat pump hot water system comprises a second compressor (6), a domestic hot water tank (7), a second throttling device (8) and a second air-cooled evaporator (9); the second compressor (6), the domestic hot water tank (7), the second throttling device (8) and the second air-cooled evaporator (9) are sequentially connected in series through refrigerant pipelines to form a heat pump heating cycle to prepare hot water;

the evaporation section of the first heat pipe (P1) is located outdoors, the condensation section is located in the water inside the first energy storage water tank (S1), and the evaporation section of the first heat pipe (P1) is coated with a selective coating for enhancing solar energy absorption; the evaporation section of the second heat pipe (P2) is positioned in the water inside the second energy storage water tank (S2), and the condensation section is positioned in the water inside the first energy storage water tank (S1); the evaporation section of the third heat pipe (P3) is positioned in the water in the third energy storage water tank (S3), and the condensation section is positioned at the air outlet of the second air-cooled evaporator (9);

the first energy storage water tank (S1) comprises a water tank shell and a phase change energy storage module, wherein the shell is provided with a water inlet, a water outlet and a heat pipe inlet, water is filled in the first energy storage water tank, the water outlet is connected with the water inlet of a domestic hot water tank (7) through a water pipe (10) and used for conveying hot water into the domestic hot water tank (7), and the phase change energy storage module is arranged in the water tank shell;

the temperature sensor module comprises a first temperature sensor arranged at an air inlet of the air-cooled condenser (2) and a second temperature sensor arranged in water of a third energy storage water tank (S3), signal output ends of the first temperature sensor and the second temperature sensor are respectively electrically connected with a signal input end of the controller, and the signal output end of the controller is respectively electrically connected with control signal input ends of a first electric two-way valve (V1) and a second electric two-way valve (V2).

In an embodiment of the invention, the second energy storage water tank (S2) and the third energy storage water tank (S3) both include a water tank shell, a phase change energy storage module, and a refrigerant pipeline, wherein the shell is provided with a water inlet, a water outlet, a heat pipe inlet, a refrigerant inlet, and a refrigerant outlet, and water is filled in the shell; the phase change energy storage module and the refrigerant pipeline are both arranged in water in the water tank, and two ends of the refrigerant pipeline are respectively connected with the corresponding refrigerant pipelines through the refrigerant inlet and the refrigerant outlet.

In an embodiment of the invention, the first heat pipe (P1), the second heat pipe (P2) and the third heat pipe (P3) are gravity heat pipes, and form an included angle of 30 ~ 45 ℃ with the horizontal plane, so that liquid refrigerant can conveniently flow back to the bottom under the action of gravity, and the flowing medium in the gravity heat pipes is refrigerant comprising R410 and R134 a.

In an embodiment of the invention, the phase change energy storage module is embedded in the metal plates by using a phase change material, and the metal plates are parallel to each other to form the water flow channel.

In an embodiment of the present invention, the phase change material is an inorganic hydrated salt, paraffin, or an organic-inorganic composite phase change material.

In an embodiment of the invention, the phase change temperature of the phase change material of the first energy storage water tank (S1) is 35 ~ 40 ℃, the phase change temperature of the phase change material of the second energy storage water tank (S2) is 45 ~ 50 ℃, and the phase change temperature of the phase change material of the third energy storage water tank (S3) is 20 ~ 25 ℃.

In an embodiment of the invention, the water tank shell is a metal shell or a plastic shell; and heat insulation materials are arranged on the periphery of the outer sides of the water tank shell and the heat insulation section of the heat pipe, so that heat is prevented from being dissipated to the environment.

In an embodiment of the invention, the heat insulating material is polyurethane, polystyrene, glass wool or rubber plastic.

The invention also provides a method for utilizing the energy storage type renewable energy and recovering the waste heat of the air conditioner, and the system for utilizing the energy storage type renewable energy and recovering the waste heat of the air conditioner is adopted to realize the utilization of the renewable energy and the recovery of the waste heat of the air conditioner and improve the utilization rate of energy; the specific implementation method comprises the following steps:

when the solar radiation intensity is high, the refrigerant of the evaporation section of the first heat pipe (P1) absorbs solar radiation and is changed into gaseous refrigerant, the gaseous refrigerant enters the condensation section and is cooled by water in the first energy storage water tank (S1) to be changed into liquid refrigerant, the temperature of the water is increased, the phase change material of the phase change energy storage module in the first energy storage water tank (S1) is heated, the temperature of the phase change material is increased and is melted into the liquid phase change material, solar energy is stored, the liquid refrigerant flows back to the evaporation section again by means of the gravity of the liquid refrigerant to complete a cycle, the process is repeated, and the first energy storage water tank (S1) realizes unpowered solar energy storage;

when the air-conditioning refrigeration system is started, when the air-conditioning refrigeration cycle runs, refrigerant steam at the outlet of the first compressor (1) enters the second energy storage water tank (S2) to be cooled and release heat, the temperature of water rises to heat the phase-change material of the phase-change energy storage module in the water, the temperature of the phase-change material rises to be melted into a liquid phase-change material, and heat is stored;

when the temperature difference between water in the second energy storage water tank (S2) and water in the first energy storage water tank (S1) reaches the working temperature difference of the second heat pipe (P2), the refrigerant in the evaporation section of the second heat pipe (P2) absorbs the heat of the water in the second energy storage water tank (S2) and is changed into gaseous refrigerant, the gaseous refrigerant enters the condensation section, the gaseous refrigerant is cooled by the water in the first energy storage water tank (S1) and is changed into liquid refrigerant, the temperature of the water in the first energy storage water tank (S1) is increased, the phase change material of the phase change energy storage module in the first energy storage water tank (S1) is heated, the temperature of the phase change material is increased and is melted into liquid phase change material, the heat is stored, the liquid refrigerant flows back to the evaporation section of the heat pipe again by depending on the gravity of the liquid refrigerant, the process is repeated, and the first energy storage;

when the hot water provided by the first energy storage water tank (S1) to the domestic hot water tank (7) can meet the temperature requirement, the heat pump hot water system does not need to be started; when the hot water provided by the first energy storage water tank (S1) to the domestic hot water tank (7) cannot meet the temperature requirement, a heat pump hot water system is started to realize the heating circulation of a heat pump and prepare hot water;

when the temperature difference between outdoor air and water in the third energy storage water tank (S3) reaches the working temperature difference of the third heat pipe (P3), the refrigerant in the evaporation section of the third heat pipe (P3) absorbs the heat of the water in the third energy storage water tank (S3) and becomes gaseous refrigerant, the temperature of the water is reduced, the phase-change material in the phase-change energy storage module is cooled, the temperature of the phase-change material is reduced, the phase-change material is solidified into solid phase-change material, cold energy is stored, the gaseous refrigerant enters the condensation section and is cooled by the outdoor air and becomes liquid refrigerant, the liquid refrigerant flows back to the evaporation section of the heat pipe again by means of the gravity of the liquid refrigerant to complete a cycle, the process is repeated, and the third energy storage water tank (S3); meanwhile, when the heat pump hot water system operates, the low-temperature air exhausted by the second air-cooled evaporator (9) cools the gaseous refrigerant at the condensation section of the third heat pipe (P3), and the carried cold energy is stored in the third energy storage water tank (S3);

when the water temperature in the third energy storage water tank (S3) is lower than the outdoor temperature, the first electric two-way valve (V1) is opened, the second electric two-way valve (V2) is closed, the refrigerant coming out of the air-cooled condenser (2) enters the third energy storage water tank (S3) to be cooled and released, the temperature of the refrigerant is further reduced, and the refrigeration cycle efficiency of the air conditioner is improved; otherwise, the first electric two-way valve (V1) is closed, the second electric two-way valve (V2) is opened, and the refrigerant coming out of the air-cooled condenser (2) directly enters the first throttling device (3).

Compared with the prior art, the invention has the following beneficial effects: the invention fully combines the characteristics of unpowered high-efficiency heat transfer property of the gravity heat pipe and high energy storage density of the phase-change material, and provides the system and the method for energy storage type renewable energy utilization and air conditioner waste heat recovery. The system can store cold energy discharged by a heat pump heating cycle and a natural cold source at night in the phase-change material in an unpowered manner, so that a refrigerant before entering the throttling device in the air conditioning cooling cycle is recooled, the air conditioning cooling cycle efficiency is improved, heat discharged by the air conditioning cooling cycle and solar energy in the daytime are stored in the phase-change material in an unpowered manner to be used as domestic hot water, and the system has a remarkable effect of improving the energy utilization rate.

Drawings

Fig. 1 is a schematic structural diagram of a system for energy storage type renewable energy utilization and air conditioner waste heat recovery according to the present invention.

The reference numbers illustrate:

1-a first compressor, 2-an air-cooled condenser, 3-a first throttling device, 4-a first air-cooled evaporator, 5-a bypass pipeline, 6-a second compressor, 7-a domestic hot water tank, 8-a second throttling device, 9-a second air-cooled evaporator, 10-a water pipe, S1-a first energy storage water tank, S2-a second energy storage water tank, S3-a third energy storage water tank, P1-a first heat pipe, P2-a second heat pipe, P3-a third heat pipe, V1-a first electric two-way valve and V2-a second electric two-way valve.

Detailed Description

The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.

The invention provides an energy storage type renewable energy utilization and air conditioner waste heat recovery system, which comprises an air conditioner refrigeration system, a heat pump hot water system, a first energy storage water tank (S1), a first heat pipe (P1), a second heat pipe (P2), a third heat pipe (P3), a temperature sensor and a controller, wherein the air conditioner refrigeration system comprises a heat pump, a heat pump hot water system, a first energy storage water tank (S1), a second heat pipe (P3526), a;

the air-conditioning refrigeration system comprises a first compressor (1), a second energy storage water tank (S2), an air-cooled condenser (2), a third energy storage water tank (S3), a first throttling device (3) and a first air-cooled evaporator (4); the air-conditioning refrigeration system is characterized in that the first compressor (1), the second energy storage water tank (S2), the air-cooled condenser (2), the third energy storage water tank (S3), the first throttling device (3) and the first air-cooled evaporator (4) are sequentially connected in series through refrigerant pipelines to form an air-conditioning refrigeration cycle, meanwhile, a first electric two-way valve (V1) is arranged at a refrigerant inlet of the third energy storage water tank (S3), and a bypass pipeline (5) is connected between a refrigerant outlet of the third energy storage water tank (S3) and an inlet of the first electric two-way valve (V1); the refrigerant pipeline of the bypass pipeline (5) is provided with a second electric two-way valve (V2);

the heat pump hot water system comprises a second compressor (6), a domestic hot water tank (7), a second throttling device (8) and a second air-cooled evaporator (9); the second compressor (6), the domestic hot water tank (7), the second throttling device (8) and the second air-cooled evaporator (9) are sequentially connected in series through refrigerant pipelines to form a heat pump heating cycle to prepare hot water;

the evaporation section of the first heat pipe (P1) is located outdoors, the condensation section is located in the water inside the first energy storage water tank (S1), and the evaporation section of the first heat pipe (P1) is coated with a selective coating for enhancing solar energy absorption; the evaporation section of the second heat pipe (P2) is positioned in the water inside the second energy storage water tank (S2), and the condensation section is positioned in the water inside the first energy storage water tank (S1); the evaporation section of the third heat pipe (P3) is positioned in the water in the third energy storage water tank (S3), and the condensation section is positioned at the air outlet of the second air-cooled evaporator (9);

the first energy storage water tank (S1) comprises a water tank shell and a phase change energy storage module, wherein the water tank shell is provided with a water inlet, a water outlet and a heat pipe inlet, water is filled in the water tank shell, the water outlet is connected with the water inlet of a domestic hot water tank (7) through a water pipe (10) and used for conveying hot water into the domestic hot water tank (7), and the phase change energy storage module is arranged in the water tank shell;

the temperature sensor module comprises a first temperature sensor arranged at an air inlet of the air-cooled condenser (2) and a second temperature sensor arranged in water of a third energy storage water tank (S3), signal output ends of the first temperature sensor and the second temperature sensor are respectively electrically connected with a signal input end of the controller, and the signal output end of the controller is respectively electrically connected with control signal input ends of a first electric two-way valve (V1) and a second electric two-way valve (V2).

The following are specific examples of the present invention.

Fig. 1 shows an energy storage type renewable energy utilization and air conditioner waste heat recovery system, which includes an air conditioner refrigeration system, a heat pump hot water system, a first energy storage water tank S1, a plurality of first heat pipes P1, a plurality of second heat pipes P2, a plurality of third heat pipes P3, a temperature sensor, and a controller.

The air-conditioning refrigeration system comprises a first compressor 1, a second energy storage water tank S2, an air-cooled condenser 2, a third energy storage water tank S3, a first throttling device 3 and a first air-cooled evaporator 4; the first compressor 1, the second energy storage water tank S2, the air-cooled condenser 2, the third energy storage water tank S3, the first throttling device 3 and the first air-cooled evaporator 4 are sequentially connected in series through refrigerant pipelines to form an air-conditioning refrigeration cycle, meanwhile, a refrigerant inlet of the third energy storage water tank S3 is provided with a first electric two-way valve V1, and a refrigerant outlet of the third energy storage water tank S3 and an inlet of the first electric two-way valve V1 are further connected with a bypass pipeline 5; the bypass pipeline 5 is a refrigerant pipeline, and a second electric two-way valve V2 is arranged on the bypass pipeline;

the heat pump hot water system comprises a second compressor 6, a domestic hot water tank 7, a second throttling device 8 and a second air-cooled evaporator 9; the second compressor 6, the domestic hot water tank 7, the second throttling device 8 and the second air-cooled evaporator 9 are sequentially connected in series through refrigerant pipelines to form a heat pump heating cycle, and hot water is prepared.

The evaporation section of the first heat pipe P1 is located outdoors, the condensation section is located in the water inside the first energy storage water tank S1, and meanwhile, the evaporation section of the first heat pipe P1 is coated with a selective coating for enhancing solar energy absorption; the evaporation section of the second heat pipe P2 is positioned in the water in the second energy storage water tank S2, and the condensation section is positioned in the water in the first energy storage water tank S1; the evaporation section of the third heat pipe P3 is positioned in the water in the third energy storage water tank S3, and the condensation section is positioned at the air outlet of the second air-cooled evaporator 9.

First energy storage water tank S1 include water tank shell, phase change energy storage module, be provided with water inlet, delivery port, outlet, heat pipe import on its casing, there is water inside, the delivery port leads to pipe 10 to be connected with the water inlet of life hot water tank 7, carries life hot water tank 7 with hot water in, phase change energy storage module is in the inside aquatic of water tank.

The second energy storage water tank S2 and the third energy storage water tank S3 comprise water tank shells, phase change energy storage modules and refrigerant pipelines, wherein the shells are provided with a water inlet, a water outlet, a heat pipe inlet, a refrigerant inlet and a refrigerant outlet, and water is filled in the shells; the phase change energy storage module and the refrigerant pipeline are both arranged in water in the water tank, and two ends of the refrigerant pipeline are respectively connected with the corresponding refrigerant pipelines through the refrigerant inlet and the refrigerant outlet.

The first heat pipe P1, the second heat pipe P2 and the third heat pipe P3 are all gravity heat pipes and form an included angle of 30 ~ 45 ℃ with the horizontal plane, liquid refrigerants can conveniently flow back to the bottom under the action of gravity, and flowing media in the gravity heat pipes are refrigerants such as R410 and R134 a.

The phase change energy storage module is characterized in that phase change materials are embedded in a metal plate, the metal plate is parallel to each other to form a water flow channel, the phase change materials are inorganic hydrated salt, paraffin or organic-inorganic composite phase change materials, the phase change temperature of the phase change material of the first energy storage water tank S1 is 35 ~ 40 ℃, the phase change temperature of the phase change material of the second energy storage water tank S2 is 45 ~ 50 ℃, and the phase change temperature of the phase change material of the third energy storage water tank S3 is 20 ~ 25 ℃.

The water tank shell is a metal shell or a plastic shell; the periphery of the outer sides of the water tank shell and the heat pipe heat insulation section is provided with heat insulation materials, so that heat is prevented from being dissipated to the environment; the heat-insulating material is polyurethane, polystyrene, glass wool or rubber and plastic.

The temperature sensor module comprises a first temperature sensor arranged at an air inlet of the air-cooled condenser and a second temperature sensor arranged in water of a third energy storage water tank, the signal output ends of the first temperature sensor and the second temperature sensor are respectively and electrically connected with the signal input end of the controller, and the signal output end of the controller is respectively and electrically connected with the control signal input ends of the first electric two-way valve and the second electric two-way valve.

A method for energy storage type renewable energy utilization and air conditioner waste heat recovery adopts the system for energy storage type renewable energy utilization and air conditioner waste heat recovery; the method comprises the following steps:

when the intensity of solar radiation is high, the refrigerant of the evaporation section of the first heat pipe P1 absorbs the solar radiation and becomes a gaseous refrigerant, the gaseous refrigerant enters the condensation section and is cooled by the water in the first energy storage water tank S1 to become a liquid refrigerant, the temperature of the water is increased to heat the phase change material in the first energy storage water tank S1, the temperature of the phase change material is increased to be melted into the liquid phase change material, the solar energy is stored, the liquid refrigerant flows back to the evaporation section again to complete a cycle depending on the gravity of the liquid refrigerant, the process is repeated, and the first energy storage water tank S1 realizes unpowered solar heat storage.

When the air-conditioning refrigeration cycle operates, refrigerant steam at the outlet of the first compressor 1 enters the second energy storage water tank S2 to be cooled and release heat, the temperature of water rises to heat the phase-change material therein, the temperature of the phase-change material rises to be melted into a liquid phase-change material, and heat is stored.

When the temperature difference between the water in the second energy storage water tank S2 and the water in the first energy storage water tank S1 reaches the working temperature difference of the second heat pipe P2, the refrigerant in the evaporation section of the second heat pipe P2 absorbs the heat of the water in the second energy storage water tank S2 and becomes a gaseous refrigerant, the gaseous refrigerant enters the condensation section and is cooled by the water in the first energy storage water tank S1 to become a liquid refrigerant, the temperature of the water in the first energy storage water tank S1 rises to heat the phase change material of the phase change energy storage module in the first energy storage water tank S1, the temperature of the phase change material rises to be melted into the liquid phase change material, the heat is stored, the liquid refrigerant flows back to the evaporation section of the heat pipe again by means of the gravity of the liquid refrigerant to complete a cycle, the process is repeated, and the unpowered air conditioner.

When the hot water provided by the first energy storage water tank S1 to the domestic hot water tank 7 can meet the temperature requirement, the heat pump heating cycle does not need to be started; when the hot water provided by the first energy storage water tank S1 to the domestic hot water tank 7 does not meet the temperature requirement, the heat pump heating cycle is started to prepare hot water.

When the temperature difference between the outdoor air and the water in the third energy storage water tank S3 reaches the working temperature difference of the third heat pipe P3, the refrigerant in the evaporation section of the third heat pipe P3 absorbs the heat of the water in the third energy storage water tank S3 and becomes a gaseous refrigerant, the temperature of the water is reduced, the phase-change material in the evaporation section of the third heat pipe is cooled, the temperature of the phase-change material is reduced, the phase-change material is solidified into a solid phase-change material, cold energy is stored, the gaseous refrigerant enters the condensation section and is cooled by the outdoor air to become a liquid refrigerant, the liquid refrigerant flows back to the evaporation section of the heat pipe again by depending on the gravity of the liquid refrigerant to complete a cycle, the process is repeated; meanwhile, when the heat pump hot water system operates, the low-temperature air discharged by the second air-cooled evaporator 9 cools the gaseous refrigerant at the condensation section of the third heat pipe P3, and the carried cold energy is stored in the third energy-storage water tank S3.

When the water temperature in the third energy storage water tank S3 is lower than the outdoor temperature, the first electric two-way valve V1 is opened, the second electric two-way valve V2 is closed, the refrigerant from the air-cooled condenser 2 enters the third energy storage water tank S3 to be cooled and released, the temperature of the refrigerant is further reduced, and the refrigeration cycle efficiency of the air conditioner is improved; otherwise, the first electric two-way valve V1 is closed, the second electric two-way valve V2 is opened, and the refrigerant coming out of the air-cooled condenser 2 directly enters the first throttling device 3.

The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.