Waste heat recovery system of energy storage air conditioner

Abstract

The utility model provides an energy storage air conditioner waste heat recovery system which comprises an energy storage air conditioner system, a domestic hot water system, an indoor air cooling system, a first heat exchanger and a second heat exchanger. The domestic hot water system is used for providing domestic hot water, and the indoor air system is used for adjusting the indoor temperature. The energy storage air conditioning system is in heat exchange connection with the domestic hot water system through a first heat exchanger and is in heat exchange connection with the indoor air system through a second heat exchanger. The waste heat utilization of the energy storage air conditioning system can be improved, and waste of the waste heat of the energy storage air conditioning system is better avoided.

Description

Technical Field

[0001] This application belongs to the field of heat recovery technology, and in particular relates to an energy storage air conditioning waste heat recovery system. Background Technology

[0002] The charging and discharging process of energy storage batteries generates a large amount of heat. Using an energy storage air conditioning system for efficient heat management ensures the efficient operation and safety of the energy storage batteries. However, the energy storage air conditioning system also generates a significant amount of waste heat. Current technology typically uses this waste heat to heat water for supplying nearby users, but this method of waste heat utilization is relatively limited, resulting in the waste heat from the energy storage air conditioning system not being fully utilized. Utility Model Content

[0003] This application provides an energy storage air conditioning waste heat recovery system to improve the utilization of waste heat from existing energy storage air conditioning systems.

[0004] The energy storage air conditioning waste heat recovery system provided in this application embodiment includes an energy storage air conditioning system, a domestic hot water system, an indoor air system, a first heat exchanger, and a second heat exchanger. The domestic hot water system is used to provide domestic hot water, and the indoor air system is used to regulate indoor temperature. The energy storage air conditioning system and the domestic hot water system are connected for heat exchange through the first heat exchanger, and the energy storage air conditioning system and the indoor air system are connected for heat exchange through the second heat exchanger.

[0005] Optionally, the energy storage air conditioning waste heat recovery system further includes a heat pump circulation system and a third heat exchanger. The energy storage air conditioning system is connected to the heat pump circulation system through the third heat exchanger, the heat pump circulation system is connected to the domestic hot water system through the first heat exchanger, and the heat pump circulation system is connected to the indoor air system through the second heat exchanger.

[0006] Optionally, the energy storage air conditioning waste heat recovery system further includes an organic Rankine cycle system and a fourth heat exchanger. The heat pump cycle system is connected to the organic Rankine cycle system through the fourth heat exchanger, and the organic Rankine cycle system is connected to the domestic hot water system through the first heat exchanger.

[0007] Optionally, the energy storage air conditioning waste heat recovery system further includes a compression refrigeration cycle system, which is connected to the domestic hot water system through the first heat exchanger, and to the indoor air system through the second heat exchanger. The organic Rankine cycle system selectively drives the compression refrigeration cycle system.

[0008] Optionally, the organic Rankine cycle system includes a turbine and a connecting rod, and the compression refrigeration cycle system includes a third compressor. The turbine selectively drives the third compressor through the connecting rod. The turbine, the first heat exchanger, and the fourth heat exchanger are connected end-to-end in sequence, and the third compressor, the first heat exchanger, and the second heat exchanger are connected end-to-end in sequence.

[0009] Optionally, the organic Rankine cycle system further includes a working fluid pump connected between the fourth heat exchanger and the first heat exchanger.

[0010] Optionally, the energy storage air conditioning system includes a first compressor and a condenser, wherein the first compressor, the third heat exchanger, and the condenser are connected end to end in sequence.

[0011] Optionally, the energy storage air conditioning system further includes a fifth heat exchanger, a return liquid pipe, an injection liquid pipe, and a water pump. The return liquid pipe, the water pump, the fifth heat exchanger, and the injection liquid pipe are connected in sequence, and the first compressor, the third heat exchanger, the condenser, and the fifth heat exchanger are connected end to end in sequence.

[0012] Optionally, a first three-way valve is connected between the water pump and the fifth heat exchanger, and a second three-way valve is connected between the fifth heat exchanger and the injection pipeline, with the second three-way valve connected to the first three-way valve.

[0013] Optionally, the heat pump cycle system includes a second compressor, the second compressor, the fourth heat exchanger, and the third heat exchanger are connected end to end in sequence; a third three-way valve is connected between the second compressor and the fourth heat exchanger, and a fourth three-way valve is connected between the fourth heat exchanger and the third heat exchanger, and the third three-way valve, the second heat exchanger, and the fourth three-way valve are connected in sequence.

[0014] Optionally, the domestic hot water system includes an inlet pipe, an outlet pipe, and a water tank, wherein the inlet pipe, the first heat exchanger, the outlet pipe, and the water tank are connected in sequence.

[0015] Optionally, the domestic hot water system further includes a temperature sensor and a second electric heater. The temperature sensor is communicatively connected to the second electric heater. The temperature sensor is used to detect the water temperature in the water tank, and the second electric heater selectively heats the water in the water tank.

[0016] Optionally, the indoor air system includes an air outlet duct, an air inlet duct, and a second fan, wherein the air outlet duct, the second fan, the second heat exchanger, and the air inlet duct are connected in sequence.

[0017] The energy storage air conditioning waste heat recovery system provided in this application embodiment is configured to connect the energy storage air conditioning system and the domestic hot water system through a first heat exchanger, and connect the energy storage air conditioning system and the indoor air system through a second heat exchanger. This allows the waste heat of the energy storage air conditioning system to be used for domestic hot water and indoor temperature regulation, thereby improving the utilization of the waste heat of the energy storage air conditioning system, better avoiding the waste of the waste heat of the energy storage air conditioning system, and providing convenience to the surrounding residents. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without creative effort. In the following description, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic diagram of the structure of the energy storage air conditioning waste heat recovery system provided in the embodiments of this application.

[0020] Explanation of icon numbers:

[0021] 102. First compressor; 103. Condenser; 104. Fifth heat exchanger; 105. Return liquid pipe; 106. Injection liquid pipe; 107. Water pump; 108. First throttling device; 109. First fan; 110. First three-way valve; 111. Second three-way valve; 112. First electric heater; 201. Second compressor; 202. Second throttling device; 203. Third three-way valve; 204. Fourth three-way valve; 301. Turbine; 302. Working fluid pump; 303. Connecting rod ; 401, Third compressor; 402, Third throttling device; 501, Water tank; 502, Inlet pipe; 503, Outlet pipe; 504, Temperature sensor; 505, Second electric heater; 506, First valve; 601, Outlet duct; 602, Inlet duct; 603, Second fan; 604, Dehumidifier; 605, Second valve; 701, First heat exchanger; 702, Second heat exchanger; 703, Third heat exchanger; 704, Fourth heat exchanger; 800, Room. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] This application provides an energy storage air conditioning waste heat recovery system, such as... Figure 1 As shown, the energy storage air conditioning waste heat recovery system includes an energy storage air conditioning system, a domestic hot water system, an indoor air system, a first heat exchanger 701, and a second heat exchanger 702. The domestic hot water system is used to provide domestic hot water, and the indoor air system is used to regulate the indoor temperature. The energy storage air conditioning system and the domestic hot water system are connected for heat exchange through the first heat exchanger 701, and the energy storage air conditioning system and the indoor air system are connected for heat exchange through the second heat exchanger 702.

[0026] The energy storage air conditioning waste heat recovery system provided in this application embodiment is configured to connect the energy storage air conditioning system and the domestic hot water system through a first heat exchanger 701, and connect the energy storage air conditioning system and the indoor air system through a second heat exchanger 702. This allows the waste heat of the energy storage air conditioning system to be used for domestic hot water and indoor temperature regulation, thereby improving the utilization of the waste heat of the energy storage air conditioning system, better avoiding the waste of the waste heat of the energy storage air conditioning system, and providing convenience to the surrounding residents.

[0027] In some embodiments of this application, the energy storage air conditioning waste heat recovery system further includes a heat pump circulation system and a third heat exchanger 703. The energy storage air conditioning system and the heat pump circulation system are connected via the third heat exchanger 703, the heat pump circulation system and the domestic hot water system are connected via the first heat exchanger 701, and the heat pump circulation system and the indoor air system are connected via the second heat exchanger 702. This application transfers the waste heat from the energy storage air conditioning system to the heat pump circulation system via the third heat exchanger 703. The heat pump circulation system can raise the temperature of the received low-temperature waste heat from the energy storage air conditioning system; appropriate temperature increases can improve the energy efficiency ratio. Specifically, the heat from the heated energy pump circulation system can be transferred to the domestic hot water system via the first heat exchanger 701 to heat domestic water, or it can be transferred to the indoor air system via the second heat exchanger 702 to provide indoor heating.

[0028] The energy storage air conditioning system contains a refrigerant that can circulate, and the heat pump cycle system contains a first working fluid that can circulate. The first heat exchanger 701 is provided with a first channel and a second channel that are isolated from each other. The first heat exchanger 701 is connected to the energy storage air conditioning system through its first channel. The refrigerant flows through the first channel of the first heat exchanger 701. The first heat exchanger 701 is connected to the heat pump cycle system through its second channel. The first working fluid flows through the second channel of the first heat exchanger 701. In this way, the refrigerant and the first working fluid can exchange heat when flowing through the first heat exchanger 701, realizing the heat exchange connection between the energy storage air conditioning system and the heat pump cycle system.

[0029] In some embodiments of this application, the energy storage air conditioning waste heat recovery system further includes an organic Rankine cycle system and a fourth heat exchanger 704. The heat pump cycle system and the organic Rankine cycle system are connected through the fourth heat exchanger 704, and the organic Rankine cycle system and the domestic hot water system are connected through the first heat exchanger 701.

[0030] Specifically, the organic Rankine cycle system carries a second working fluid that can circulate. The second heat exchanger 702 is provided with a first channel and a second channel that are isolated from each other. The second heat exchanger 702 is connected to the heat pump cycle system through its first channel. The first working fluid flows through the first channel of the second heat exchanger 702. The second heat exchanger 702 is connected to the organic Rankine cycle system through its second channel. The second working fluid flows through the second channel of the second heat exchanger 702. In this way, the first and second working fluids can exchange heat when flowing through the second heat exchanger 702, realizing the heat exchange connection between the heat pump cycle system and the organic Rankine cycle system.

[0031] The domestic hot water system carries domestic water. The third heat exchanger 703 is equipped with a first channel, a second channel, and a third channel that are isolated from each other. The third heat exchanger 703 is connected to the organic Rankine cycle system through its first channel. The second working fluid flows through the first channel of the third heat exchanger 703. The third heat exchanger 703 is connected to the domestic hot water system through its third channel. The domestic water flows through the third channel of the third heat exchanger 703. In this way, the domestic water and the second working fluid can exchange heat when flowing through the third heat exchanger 703, realizing the heat exchange connection between the domestic hot water system and the organic Rankine cycle system.

[0032] In some embodiments of this application, the energy storage air conditioning waste heat recovery system further includes a compression refrigeration cycle system. The compression refrigeration cycle system is connected to the domestic hot water system through a first heat exchanger 701, and the compression refrigeration cycle system is connected to the indoor air system through a second heat exchanger 702. The organic Rankine cycle system selectively drives the compression refrigeration cycle system.

[0033] Specifically, the compression refrigeration cycle system carries a third working fluid that can circulate. The third heat exchanger 703 is connected to the compression refrigeration cycle system through its second channel. The third working fluid flows through the second channel of the third heat exchanger 703. In this way, the third working fluid and the domestic water can exchange heat when flowing through the third heat exchanger 703, realizing the heat exchange connection between the compression refrigeration cycle system and the domestic hot water system.

[0034] Airflow flows through the indoor air system. The fourth heat exchanger 704 is provided with a first channel, a second channel, and a third channel that are isolated from each other. The fourth heat exchanger 704 is connected to the compression refrigeration system through its first channel. The third working fluid flows through the first channel of the fourth heat exchanger 704. The fourth heat exchanger 704 is connected to the heat pump cycle system through its second channel. The first working fluid flows through the second channel of the fourth heat exchanger 704. The fourth heat exchanger 704 is connected to the indoor air system through its third channel. The airflow flows through the third channel of the fourth heat exchanger 704. In this way, the first working fluid and the airflow can exchange heat when flowing through the fourth heat exchanger 704, realizing the heat exchange connection between the indoor air system and the heat pump cycle system. The third working fluid and the airflow can exchange heat when flowing through the fourth heat exchanger 704, realizing the heat exchange connection between the indoor air system and the compression refrigeration system.

[0035] Understandably, this application transfers the waste heat from the energy storage air conditioning system to the heat pump cycle system via the third heat exchanger 703. The heat pump cycle system heats up the received low-temperature waste heat from the energy storage air conditioning system and transfers the heated heat to the organic Rankine cycle system via the fourth heat exchanger 704 or to the indoor air system via the second heat exchanger 702 for indoor heating. The organic Rankine cycle system can transfer the received heat to the hot water system via the first heat exchanger 701 for heating domestic water. At the same time, the organic Rankine cycle system can also selectively use the received heat to drive the operation of the compression refrigeration cycle system. When the compression refrigeration cycle system is working, it exchanges heat with the indoor air system via the second heat exchanger 702 for indoor cooling. The compression refrigeration cycle system also exchanges heat with the hot water system via the first heat exchanger 701 for heating domestic water. This achieves the recovery of waste heat from the energy storage air conditioning system and uses the recovered waste heat for domestic hot water and indoor cooling, thereby avoiding the waste of waste heat from the energy storage air conditioning system and providing convenience to surrounding residents.

[0036] In some embodiments of this application, the energy storage air conditioning system includes a first compressor 102 and a condenser 103, with the first compressor 102, the third heat exchanger 703, and the condenser 103 connected end-to-end. Specifically, the first channel of the first compressor 102, the third heat exchanger 703, and the condenser 103 are connected end-to-end, and the refrigerant of the energy storage air conditioning system circulates in the first compressor 102, the third heat exchanger 703, and the condenser 103.

[0037] Optionally, the energy storage air conditioning system is a liquid-cooled energy storage air conditioning system. The energy storage air conditioning system also includes a fifth heat exchanger 104, a return liquid pipe 105, an injection liquid pipe 106, and a water pump 107. The return liquid pipe 105, the water pump 107, the fifth heat exchanger 104, and the injection liquid pipe 106 are connected in sequence. The first compressor 102, the third heat exchanger 703, the condenser 103, and the fifth heat exchanger 104 are connected end to end in sequence. Specifically, the fifth heat exchanger 104 has a first channel and a second channel. The return liquid pipe 105, the water pump 107, the first channel of the fifth heat exchanger 104, and the injection pipe 106 are connected in sequence. The first compressor 102, the third heat exchanger 703, the condenser 103, and the second channel of the fifth heat exchanger 104 are connected end to end. Liquid cooling medium (e.g., a water-ethylene glycol mixture) flows in the return liquid pipe 105, the water pump 107, the first channel of the fifth heat exchanger 104, and the injection pipe 106. This liquid cooling medium is used to cool the energy storage battery or other devices that require cooling. The liquid cooling medium and the refrigerant of the energy storage air conditioning system can exchange heat when flowing through the fifth heat exchanger 104 to cool the liquid cooling medium.

[0038] Specifically, the liquid-cooled energy storage air conditioning system includes a liquid-cooled end and a refrigerant end. The liquid-cooled end includes components such as a return pipe 105, an injection pipe 106, and a water pump 107. The refrigerant end includes components such as a first compressor 102 and a condenser 103. The liquid-cooled end and the refrigerant end exchange heat through a fifth heat exchanger 104. That is, the liquid cooling working fluid flowing through the liquid-cooled end and the refrigerant flowing through the refrigerant end exchange heat in the fifth heat exchanger 104, thereby cooling the liquid cooling working fluid in the liquid-cooled end. The cooled liquid cooling working fluid then flows through... The supercooled plate cools the energy storage battery to regulate the cell temperature, ensure charging and discharging safety, and extend the cell life. The refrigerant at the refrigerant end exchanges heat with the liquid cooling working fluid in the fifth heat exchanger 104 and then flows to the third heat exchanger 703. The refrigerant is pre-cooled by exchanging heat with the first working fluid of the heat pump cycle system in the third heat exchanger 703, and then flows to the condenser 103 for further cooling. Finally, the refrigerant returns to the fifth heat exchanger 104 to exchange heat with the liquid cooling working fluid flowing in the liquid cooling end, and so on.

[0039] Optionally, a first three-way valve 110 is connected between the water pump 107 and the fifth heat exchanger 104, and a second three-way valve 111 is connected between the fifth heat exchanger 104 and the injection pipe 106. The second three-way valve 111 is connected to the first three-way valve 110. Specifically, both the first three-way valve 110 and the second three-way valve 111 have three ports A, B, and C. Port A of the first three-way valve 110 is connected to the water pump 107, port B of the first three-way valve 110 is connected to the first channel inlet of the fifth heat exchanger 104, port C of the first three-way valve 110 is connected to port C of the second three-way valve 111, port A of the second three-way valve 111 is connected to the injection pipe 106, and port B of the second three-way valve 111 is connected to the first channel outlet of the fifth heat exchanger 104.

[0040] Optionally, a first electric heater 112 is provided on the liquid injection pipe 106. The first electric heater 112 is used to turn on the heating when the temperature of the liquid cooling medium is lower than the set value, so as to heat the liquid cooling medium in the liquid cooling circuit and avoid damage to the energy storage battery when the temperature of the liquid cooling medium is too low.

[0041] In some embodiments of this application, the energy storage air conditioning system further includes a first fan 109, which is disposed on one side of the condenser 103 to dissipate heat from the condenser 103, thereby improving the heat exchange efficiency of the condenser 103.

[0042] Optionally, the energy storage air conditioning system also includes a first throttling element 108, which is connected between the condenser 103 and the fifth heat exchanger 104. Optionally, the first throttling element 108 can be an expansion valve, a throttling valve, or a capillary tube.

[0043] In some embodiments of this application, the heat pump cycle system includes a second compressor 201, the second compressor 201, a fourth heat exchanger 704 and a third heat exchanger 703 connected end to end; a third three-way valve 203 is connected between the second compressor 201 and the fourth heat exchanger 704, and a fourth three-way valve 204 is connected between the fourth heat exchanger 704 and the third heat exchanger 703; the third three-way valve 203, the second heat exchanger 702 and the fourth three-way valve 204 are connected in sequence.

[0044] Specifically, both the third three-way valve 203 and the fourth three-way valve 204 have three ports A, B, and C. Port A of the third three-way valve 203 is connected to the outlet of the second compressor 201, port B of the third three-way valve 203 is connected to the first channel inlet of the fourth heat exchanger 704, and port C of the third three-way valve 203 is connected to the second channel inlet of the second heat exchanger 702. Port A of the fourth three-way valve 204 is connected to the first channel inlet of the third heat exchanger 703, port B of the fourth three-way valve 204 is connected to the first channel outlet of the fourth heat exchanger 704, and port C of the fourth three-way valve 204 is connected to the second channel outlet of the second heat exchanger 702.

[0045] Optionally, the heat pump cycle system further includes a second throttling element 202, which is connected between the third heat exchanger 703 and the fourth heat exchanger 704. Optionally, the second throttling element 202 can be an expansion valve, a throttling valve, or a capillary tube.

[0046] In some embodiments of this application, the organic Rankine cycle system includes a turbine 301 and a connecting rod 303, and the compression refrigeration cycle system includes a third compressor 401. The turbine 301 selectively drives the third compressor 401 through the connecting rod 303. The turbine 301, the first heat exchanger 701, and the fourth heat exchanger 704 are connected end-to-end in sequence, and the third compressor 401, the first heat exchanger 701, and the second heat exchanger 702 are connected end-to-end in sequence. The turbine 301 can convert heat into kinetic energy, and drive the third compressor 401 of the compression refrigeration cycle system to perform work.

[0047] This application sets the turbine 301 to selectively drive the third compressor 401 through the connecting rod 303, thereby allowing the organic Rankine cycle system and the compression refrigeration cycle system to be selectively independent of each other. This enables functional changes during seasonal variations. For example, when indoor cooling is not required in winter or autumn, the organic Rankine cycle system and the compression refrigeration cycle system can be separated, and the power output of the organic Rankine cycle system can be used for other functions such as power supply or indoor heating.

[0048] Specifically, the two ends of the connecting rod 303 are detachably connected to the turbine 301 and the third compressor 401, respectively. When the organic Rankine cycle system is connected to the compression refrigeration cycle system, the organic Rankine cycle system converts heat into kinetic energy through the turbine 301, and drives the connecting rod 303 to drive the third compressor 401 of the compression refrigeration cycle system to perform work. When the organic Rankine cycle system does not need to be connected to the compression refrigeration cycle system, the connecting rod 303 can be detached from the turbine 301 and the third compressor 401, so that the turbine 301 cannot drive the third compressor 401 to perform work, and the compression refrigeration cycle system does not operate.

[0049] Optionally, the organic Rankine cycle system also includes a working fluid pump 302, which is connected between the fourth heat exchanger 704 and the first heat exchanger 701. The working fluid pump 302 is used to drive the operation of the second working fluid in the organic Rankine cycle system, and also plays a role in pressurizing and heating it.

[0050] Optionally, the compression refrigeration cycle system further includes a third throttling element 402, which is connected between the first heat exchanger 701 and the second heat exchanger 702. Optionally, the third throttling element 402 can be an expansion valve, a throttling valve, or a capillary tube.

[0051] In some embodiments of this application, the domestic hot water system includes an inlet pipe 502, an outlet pipe 503, and a water tank 501, which are connected sequentially. Specifically, the inlet pipe 502, the third channel of the first heat exchanger 701, the outlet pipe 503, and the water tank 501 are connected sequentially. Domestic water is transported to the first heat exchanger 701 through the inlet pipe 502, where it exchanges heat with the second working fluid of an organic Rankine cycle system and / or the third working fluid of a compression refrigeration cycle system. The resulting hot water flows into the water tank 501 through the outlet pipe 503 for storage and is used by residents. A first valve 506 may be provided on the inlet pipe 502 to control the inlet water flow rate.

[0052] Optionally, the water tank 501 is equipped with a temperature sensor 504 and a second electric heater 505. The temperature sensor 504 is communicatively connected to the second electric heater 505. The temperature sensor 504 is used to detect the water temperature in the water tank 501, and the second electric heater 505 selectively heats the water in the water tank 501. Specifically, the temperature sensor 504 detects the water temperature in the water tank. When the water temperature in the water tank is lower than a set value, the second electric heater 505 is activated to heat the water, thereby achieving a stable supply of domestic hot water.

[0053] In some embodiments of this application, the indoor air system includes an air outlet duct 601, an air inlet duct 602, and a second fan 603, which are connected sequentially. Specifically, the air outlet duct 601, the second fan 603, the third channel of the second heat exchanger 702, the air inlet duct 602, and the room 800 are connected end-to-end. Optionally, a dehumidifier 604 is provided on the air outlet duct 601. When cooling the room, the dehumidifier 604 is activated to dehumidify the air and prevent the air from becoming too humid, which could cause discomfort to the user. A second valve 605 is provided on the air inlet duct 602 to control the air intake volume.

[0054] When indoor cooling is required, the outlet duct 601 delivers hot air from room 800 to the second heat exchanger 702 via the second fan 603. In the second heat exchanger 702, the air exchanges heat with the third working fluid of the compression refrigeration cycle system, cooling it down to become cold air. Then, the inlet duct 602 delivers the cooled air to room 800, providing cooling to room 800. When indoor heating is required, the outlet duct 601 delivers cold air from room 800 to the second heat exchanger 702 via the second fan 603. In the second heat exchanger 702, the air exchanges heat with the first working fluid of the heat pump cycle system, heating it up to become hot air. Then, the inlet duct 602 delivers the heated air to room 800, providing heating to room 800.

[0055] See Figure 1 , Figure 1 The energy storage air conditioning waste heat recovery system shown can adjust its operating status by controlling the first three-way valve 110, the second three-way valve 111, the third three-way valve 203, and the fourth three-way valve 204, thereby switching between different modes to meet the needs of residents in different seasons. The specific adjustment methods and modes are as follows:

[0056] (1) First cooling mode: When the energy storage air conditioning system is in cooling mode (at this time, the first three-way valve 110 and the second three-way valve 111 are both AB passages, and the refrigerant end of the energy storage air conditioning system is running), residents need cooling. At this time, the third three-way valve 203 and the fourth three-way valve 204 are both AB passages, and the heat pump cycle system, organic Rankine cycle system, compression refrigeration cycle system, domestic hot water system and indoor air cooling system are all running.

[0057] (2) Second cooling mode: When the energy storage liquid cooling air conditioning system is in heating mode or self-circulation mode (at this time, the first three-way valve 110 and the second three-way valve 111 are both AC passages, the refrigerant end of the energy storage air conditioning system stops working, and the first electric heater starts in heating mode), residents need cooling. At this time, the third three-way valve 203 and the fourth three-way valve 204 are both AB passages. The heat pump cycle system and the organic Rankine cycle system stop working, and the linkage between the organic Rankine cycle system and the compression refrigeration cycle system is disconnected. The third compressor 401 of the compression refrigeration cycle system is connected to the power supply, and the compression refrigeration cycle system, the domestic hot water system and the indoor air system are all running.

[0058] (3) Heating mode: When residents need heating, the third three-way valve 203 and the fourth three-way valve 204 are both AC channels. The heat pump circulation system, domestic hot water system and indoor air system are all running, while the organic Rankine circulation system and the compression refrigeration circulation system are all stopped. Among them, the domestic hot water system uses the second electric heater 505 to heat the water in the water tank 501, and the water temperature in the water tank 501 is detected by the temperature sensor 504 so that the water temperature in the water tank 501 is stabilized at the set value.

[0059] (4) Idle mode: When residents do not need heating or cooling, the energy storage air conditioning system and the domestic hot water system are both running, while the heat pump cycle system, organic Rankine cycle system and compression refrigeration cycle system are all stopped. Among them, the domestic hot water system uses the second electric heater 505 to heat the water in the water tank 501, and the water temperature in the water tank 501 is detected by the temperature sensor 504 to keep the water temperature in the water tank 501 stable at the set value.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0061] The above provides a detailed description of the energy storage air conditioning waste heat recovery system provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A waste heat recovery system for energy storage air conditioning, characterized in that, It includes an energy storage air conditioning system, a domestic hot water system, an indoor air system, a first heat exchanger (701) and a second heat exchanger (702). The domestic hot water system is used to provide domestic hot water, and the indoor air system is used to regulate indoor temperature. The energy storage air conditioning system and the domestic hot water system are connected through the first heat exchanger (701), and the energy storage air conditioning system and the indoor air system are connected through the second heat exchanger (702).

2. The energy storage air conditioning waste heat recovery system according to claim 1, characterized in that, The energy storage air conditioning waste heat recovery system also includes a heat pump circulation system and a third heat exchanger (703). The energy storage air conditioning system and the heat pump circulation system are connected through the third heat exchanger (703). The heat pump circulation system and the domestic hot water system are connected through the first heat exchanger (701). The heat pump circulation system and the indoor air system are connected through the second heat exchanger (702).

3. The energy storage air conditioning waste heat recovery system according to claim 2, characterized in that, The energy storage air conditioning waste heat recovery system also includes an organic Rankine cycle system and a fourth heat exchanger (704). The heat pump cycle system is connected to the organic Rankine cycle system through the fourth heat exchanger (704), and the organic Rankine cycle system is connected to the domestic hot water system through the first heat exchanger (701).

4. The energy storage air conditioning waste heat recovery system according to claim 3, characterized in that, The energy storage air conditioning waste heat recovery system also includes a compression refrigeration cycle system. The compression refrigeration cycle system is connected to the domestic hot water system through the first heat exchanger (701), and the compression refrigeration cycle system is connected to the indoor air system through the second heat exchanger (702). The organic Rankine cycle system selectively drives the compression refrigeration cycle system.

5. The energy storage air conditioning waste heat recovery system according to claim 4, characterized in that, The organic Rankine cycle system includes a turbine (301) and a connecting rod (303), and the compression refrigeration cycle system includes a third compressor (401). The turbine (301) selectively drives the third compressor (401) through the connecting rod (303). The turbine (301), the first heat exchanger (701) and the fourth heat exchanger (704) are connected end to end, and the third compressor (401), the first heat exchanger (701) and the second heat exchanger (702) are connected end to end.

6. The energy storage air conditioning waste heat recovery system according to claim 5, characterized in that, The organic Rankine cycle system also includes a working fluid pump (302) connected between the fourth heat exchanger (704) and the first heat exchanger (701).

7. The energy storage air conditioning waste heat recovery system according to claim 2, characterized in that, The energy storage air conditioning system includes a first compressor (102) and a condenser (103), and the first compressor (102), the third heat exchanger (703) and the condenser (103) are connected end to end.

8. The energy storage air conditioning waste heat recovery system according to claim 7, characterized in that, The energy storage air conditioning system also includes a fifth heat exchanger (104), a return liquid pipe (105), an injection liquid pipe (106), and a water pump (107). The return liquid pipe (105), the water pump (107), the fifth heat exchanger (104), and the injection liquid pipe (106) are connected in sequence. The first compressor (102), the third heat exchanger (703), the condenser (103), and the fifth heat exchanger (104) are connected end to end in sequence.

9. The energy storage air conditioning waste heat recovery system according to claim 8, characterized in that, A first three-way valve (110) is connected between the water pump (107) and the fifth heat exchanger (104), and a second three-way valve (111) is connected between the fifth heat exchanger (104) and the liquid injection pipe (106). The second three-way valve (111) is connected to the first three-way valve (110).

10. The energy storage air conditioning waste heat recovery system according to any one of claims 3 to 6, characterized in that, The heat pump cycle system includes a second compressor (201), the second compressor (201), the fourth heat exchanger (704) and the third heat exchanger (703) are connected end to end; A third three-way valve (203) is connected between the second compressor (201) and the fourth heat exchanger (704), and a fourth three-way valve (204) is connected between the fourth heat exchanger (704) and the third heat exchanger (703). The third three-way valve (203), the second heat exchanger (702) and the fourth three-way valve (204) are connected in sequence.

11. The energy storage air conditioning waste heat recovery system according to any one of claims 1 to 9, characterized in that, The domestic hot water system includes an inlet pipe (502), an outlet pipe (503), and a water tank (501), wherein the inlet pipe (502), the first heat exchanger (701), the outlet pipe (503), and the water tank (501) are connected in sequence.

12. The energy storage air conditioning waste heat recovery system according to claim 11, characterized in that, The domestic hot water system also includes a temperature sensor (504) and a second electric heater (505). The temperature sensor (504) is communicatively connected to the second electric heater (505). The temperature sensor (504) is used to detect the water temperature in the water tank (501). The second electric heater (505) selectively heats the water in the water tank (501).

13. The energy storage air conditioning waste heat recovery system according to any one of claims 1 to 9, characterized in that, The indoor air system includes an air outlet duct (601), an air inlet duct (602), and a second fan (603), which are connected in sequence.

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