An energy supply system coupling an air source heat pump with municipal heat

Abstract

This application discloses an energy supply system coupled with municipal heat supply via an air source heat pump, including an air source heat pump, a circulating pump, an energy storage tank, a heat exchanger, and a controller. The air source heat pump can not only heat the heating water supply and the heating return water from the user end, but also heat the cooling water supply and the cooling return water from the user end, and cool them down. Excess energy supplied to users during the heating or cooling process of the air source heat pump can be stored in the energy storage tank, and then used for heating or cooling. In the severe cold weather of northern regions, the air source heat pump can be coupled with municipal hot water to provide heating to users. The entire system has a simple architecture, and simple operation control can be achieved by connecting the controller to the electric regulating valve and thermometer on the system pipeline. The control method is simple. In addition, the air source heat pump coupled with municipal heat scheme maximizes the use of renewable energy and has the effect of peak shaving and valley filling, while ensuring the stability of the heat source in extremely cold weather.

Description

Technical Field

[0001] This application relates to the field of heating technology for public buildings, and in particular to an energy supply system that combines heating and cooling functions, specifically an energy supply system that uses an air source heat pump coupled with municipal heat. Background Technology

[0002] In northern my country, winter heating mainly relies on municipal centralized heat sources, which have the advantages of high primary energy utilization efficiency and relatively low operating costs. However, with the continuous improvement of building energy efficiency standards, the limitations of relying solely on municipal heat sources are gradually becoming apparent.

[0003] In addition, many ultra-low energy and near-zero energy buildings have been constructed in recent years, significantly reducing their heat load. If the traditional "high flow rate, small temperature difference" municipal heat access method continues to be used, the proportion of energy consumption in pipeline transmission will actually increase, and the overall energy efficiency of the system will decrease. To address this, some new buildings use air source heat pumps as independent heat sources. Although this makes full use of renewable energy, the coefficient of performance (COP) drops sharply under extreme low temperature conditions, requiring complete reliance on electric auxiliary heating, resulting in high operating costs and high peak pressure on the power grid.

[0004] Therefore, existing single municipal heat source heating and single air source heat pump heating systems are insufficient to meet the actual heating needs of public buildings. To address this, Chinese invention patent CN119826219A discloses a cross-seasonal thermal storage coupled solar-ground source heat pump combined heating system. During the non-heating season, this system collects and stores solar radiation heat from the off-season in the soil surrounding the buried phase change hot water storage tank and buried pipes through cross-seasonal underground thermal storage, thus performing solar-soil thermal storage. During the heating season, when the solar radiation intensity is sufficient, the heat absorbed by the solar collectors can meet the heating requirements, providing direct solar heating. When solar energy cannot meet the heating needs... Solar energy is coupled with a buried phase change hot water storage tank for heating. During cloudy or rainy weather or at night, when solar radiation intensity is almost zero, the buried phase change hot water storage tank provides direct heating. In the later stages of the heating season, as the heat released from the buried phase change hot water storage tank increases, the water supply temperature decreases, potentially failing to meet users' heating needs. In this case, when solar energy cannot meet the heating demand, a ground source heat pump is activated for combined solar and ground source heat pump heating. During cloudy or rainy weather or at night, when solar radiation intensity is almost zero, the ground source heat pump provides heating independently.

[0005] Although the aforementioned patent documents disclose a cross-seasonal solar-ground source heat pump combined heating system, offering multiple heating modes and seemingly being very environmentally friendly and energy-efficient, enabling year-round cascade utilization of renewable energy, this solution still has several drawbacks: First, the solution requires a large-area solar thermal collector array, an underground phase change hot water storage tank, and underground pipe networks, resulting in high initial investment, a long construction period, and strict requirements on soil thermal properties, groundwater level, and site area, making it difficult to implement in densely populated urban areas or areas with complex soil and rock conditions; second, relying on the combined operation of a ground source heat pump and a phase change hot water storage tank, the soil temperature field continuously decreases with the extension of heat extraction time, leading to a decrease in the temperature of the supplied water in the later stages, requiring additional heat replenishment; third, the system is complex, the control strategy is complex, and troubleshooting underground system faults is difficult after long-term operation, resulting in high maintenance costs.

[0006] Therefore, the multi-heat source coupling scheme disclosed in the aforementioned patent documents is difficult to implement. From a practical application perspective, it has little practical significance compared to traditional single municipal heat source heating or single air source heat pump heating schemes. Consequently, with increasingly stringent building energy efficiency standards, existing single municipal heat source heating and single air source heat pump heating systems are insufficient to meet the environmentally friendly and energy-saving heating requirements of public buildings. Therefore, it is necessary to propose a new technical solution to address the problems existing in the current technology. Utility Model Content

[0007] This application provides an energy supply system that couples an air source heat pump with municipal heat, in order to solve the problem that existing single municipal heat source heating and single air source heat pump heating are insufficient to meet the environmentally friendly and energy-saving heating needs of public buildings in the context of continuously improving building energy efficiency standards.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] This application provides an energy supply system coupled with an air source heat pump and municipal thermal power, including an air source heat pump, a circulating pump, an energy storage tank, a heat exchanger, and a controller, wherein:

[0010] The air source heat pump includes a heating unit for exchanging heat and raising the temperature of heating water supply and return water from the user end. The heating unit has a heating water supply port and a heating water return port. The heating water supply port is connected to the user end water supply port, and the heating water return port is connected to the user end return port through the circulation pump. A portion of the heating water produced by the air source heat pump flows to the user end, and another portion flows to the energy storage tank. The energy storage tank can supply water to the user end and receive return water from the user end. The heating water supply port, the heating water return port, and the inlet and outlet of the energy storage tank are each equipped with an electric regulating valve.

[0011] The heat exchanger has a municipal hot water inlet, a municipal hot water outlet, a heating water heat exchange inlet, and a heating water heat exchange outlet. The heat exchanger can use the municipal hot water to stabilize the temperature of the heating water supply. The heating water with a stable temperature is sent to the user's water supply port. The heating water heat exchange outlet is equipped with an electric regulating valve.

[0012] The controller can adjust the operation of each electric regulating valve in the system to control the air source heat pump to independently generate heat, or the air source heat pump to store energy in the energy storage tank while generating heat, or the energy storage tank to independently generate heat, or the air source heat pump to be coupled with municipal hot water supply for heating.

[0013] Furthermore, in the above technical solution, the air source heat pump includes a refrigeration unit for heat exchange and cooling of the cooling water supply and the cooling return water returned from the user end. The refrigeration unit has a cooling water supply port and a cooling water return port. The cooling water supply port is connected to the user end water supply port, and the cooling water return port is connected to the user end return water port through the circulation pump. A portion of the cooling water produced by the air source heat pump flows to the user end, and another portion of the cooling water produced flows to the energy storage tank. The energy storage tank can supply water to the user end and receive the user end return water. The cooling water supply port, the cooling water return port, and the inlet and outlet of the energy storage tank are respectively equipped with electric regulating valves. The controller can control the air source heat pump to independently provide cooling, or the air source heat pump to store energy in the energy storage tank while providing cooling, or the energy storage tank to independently provide cooling by adjusting the operation of each electric regulating valve in the system.

[0014] Furthermore, the heating water supply inlet and the cooling water supply inlet are respectively connected to the user-end water supply inlet via the first water supply pipe. The heating water return inlet and the cooling water return inlet are respectively connected to the outlet end of the circulating pump via the first water return pipe. The inlet end of the circulating pump is connected to the user-end water return inlet via the second water return pipe. The outlet end of the circulating pump is also connected to the heating water heat exchange inlet of the heat exchanger via the third water return pipe.

[0015] Furthermore, the energy storage tank has an outlet pipe and a return pipe, the outlet pipe being connected to the first water supply pipe and the return pipe being connected to the first return pipe.

[0016] Furthermore, the municipal hot water outlet is connected to the first water supply pipe via a second water supply pipe.

[0017] Furthermore, the energy storage tank is equipped with a liquid level sensor.

[0018] Furthermore, the first water supply pipe is equipped with a first thermometer for measuring the outlet water temperature of the energy storage tank and a second thermometer for measuring the water temperature flowing into the user's water supply port; the second return water pipe is equipped with a third thermometer for measuring the temperature of the water flowing out of the user's return water port.

[0019] Furthermore, the first water supply pipe is equipped with a first electric regulating valve and a third electric regulating valve. The first electric regulating valve can stop the air source heat pump and the energy storage tank from supplying water to the user end, and the third electric regulating valve can stop the air source heat pump from supplying water to the user end.

[0020] Furthermore, a second electric regulating valve is installed on the first return water pipe, which can stop the circulation pump from delivering user-end return water to the air source heat pump.

[0021] Furthermore, a fourth electric regulating valve is installed on the third return water pipe, which can stop the circulating pump from supplying water to the heating water inlet of the heat exchanger.

[0022] Furthermore, a fifth electric regulating valve is installed on the second water supply pipe, which can shut off the supply of municipal hot water from the heat exchanger to the user.

[0023] Furthermore, a sixth electric regulating valve is installed on the outlet pipe of the energy storage tank, and a seventh electric regulating valve is installed on the return pipe of the energy storage tank. The sixth electric regulating valve can stop the energy storage tank from supplying water to the user end, and the seventh electric regulating valve can stop the circulation pump from delivering user-end return water to the energy storage tank.

[0024] Furthermore, the liquid level sensor, the first thermometer, the second thermometer, the third thermometer, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, the fourth electric regulating valve, the fifth electric regulating valve, the sixth electric regulating valve, and the seventh electric regulating valve are respectively connected to the controller signal.

[0025] Furthermore, during the low energy consumption period from 10 PM to 8 AM the following morning in winter, the controller sends closing signals to the fourth and fifth electric regulating valves respectively, enabling the air source heat pump to independently provide heating. The controller can obtain the return water temperature in real time through the third thermometer, and the controller can output an action signal to the first electric regulating valve based on the return water temperature. After the controlled opening of the first electric regulating valve decreases, part of the heating water produced by the air source heat pump flows to the energy storage tank.

[0026] Furthermore, during the peak energy consumption period from 8 AM to 10 PM in winter, the controller sends closing signals to the fourth, fifth, second, and third electric regulating valves respectively, enabling the energy storage tank to provide independent heating. The controller can obtain the outlet water temperature of the energy storage tank in real time through the first thermometer, and can send opening signals to the second and third electric regulating valves and a closing signal to the seventh electric regulating valve based on the outlet water temperature, enabling the air source heat pump to provide auxiliary heating. The controller can monitor the liquid level of the energy storage tank in real time through the liquid level sensor, and when the liquid level of the energy storage tank reaches the lowest point, the controller sends a closing signal to the sixth electric regulating valve, enabling the air source heat pump to provide independent heating.

[0027] Furthermore, the controller can obtain the user-end water supply temperature in real time through the second thermometer to monitor whether the air source heat pump is heating enough. When the air source heat pump is not heating enough, the controller sends an opening signal to the fourth and fifth electric regulating valves, so that the air source heat pump can be coupled with the municipal heating water supply for heating.

[0028] Furthermore, the liquid level sensor, the first thermometer, the second thermometer, the third thermometer, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, the fourth electric regulating valve, the fifth electric regulating valve, the sixth electric regulating valve, and the seventh electric regulating valve are respectively connected to the controller signal. In summer, the fourth and fifth electric regulating valves are closed; during the low energy consumption period from 10 PM to 8 AM the following morning, the air source heat pump's cooling unit starts, allowing the air source heat pump to provide independent cooling; the controller can obtain the return water temperature in real time through the third thermometer, and the controller can output an action signal to the first electric regulating valve based on the return water temperature; after the controlled opening of the first electric regulating valve decreases, part of the cooling water produced by the air source heat pump flows to the energy storage tank; during the peak energy consumption period from 8 AM to 10 PM in summer, the controller is used to output an action signal to the second electric regulating valve. The valve and the third electric regulating valve respectively send a closing signal, enabling the energy storage tank to provide independent cooling; the controller can obtain the outlet water temperature of the energy storage tank in real time through the first thermometer, and the controller can send an opening signal to the second electric regulating valve and the third electric regulating valve, and a closing signal to the seventh electric regulating valve, enabling the air source heat pump to provide auxiliary cooling; the controller can monitor the liquid level of the energy storage tank in real time through the liquid level sensor, and when the liquid level of the energy storage tank reaches the lowest point, the controller sends a closing signal to the sixth electric regulating valve, enabling the air source heat pump to provide independent cooling.

[0029] Compared with the prior art, this application has at least the following beneficial effects:

[0030] 1. Based on further analysis and research of existing technologies, this application recognizes that the heating equipment currently used in public buildings is mainly municipal heating and air source heat pumps, each with its own advantages and disadvantages. Therefore, the inventor conceived of combining the two, and thus proposed the air source coupled with municipal heat source scheme of this application. This system mainly consists of an air source heat pump, a circulating pump, an energy storage tank, a heat exchanger, an electric regulating valve, a thermometer, a level gauge, a controller, and pipe connection components. The system architecture is simple, and the control method is straightforward. In the severe cold weather of northern regions, it can be combined with municipal heating. The heat pump does not require auxiliary electric heating, which can reduce power consumption and alleviate the burden on the power grid. The heating temperature of the system is more stable and the operating cost is low. Furthermore, the air source heat pump... Excess energy supplied to users during heating or cooling can be stored in an energy storage tank, which can then use the stored energy to provide heating or cooling to users, thus realizing energy storage applications and avoiding energy waste. Therefore, the scheme of using an air source heat pump coupled with municipal heating and adding an energy storage tank in this application maximizes the use of renewable energy. In the context of continuously improving building energy efficiency standards, the scheme provided in this application can meet the requirements of public buildings for environmentally friendly and energy-saving heating. Furthermore, the air source coupling scheme provided in this application is applicable to the renovation of existing buildings and the construction of new buildings. Moreover, the air source heat pump extracts heat from the outdoor air, is almost unrestricted by geological conditions, and is a "ready-to-use" device that can be quickly connected to the existing municipal heating network, making it easy to construct and implement.

[0031] 2. The energy supply system provided in this application couples an air source heat pump with a municipal heat source. When electricity prices are low, from 10 PM to 8 AM the next morning, the air source heat pump is used for heating. During the heating process, excess heat after meeting the user's needs can flow into an energy storage tank for storage, avoiding heat waste. During the day when electricity prices are high, the energy storage tank can be used for heating first. When the energy storage tank is depleted, the air source heat pump is used for heating. In extremely cold weather, the air source heat pump can be coupled with a municipal heat source for heating, which can not only reduce electricity consumption but also ensure stable heating temperature at the user end and reduce heating costs.

[0032] 3. The energy supply system provided in this application can not only provide heating but also cooling. When the electricity price is low from 10 pm to 8 am the next morning, the air source heat pump is used for cooling. During the cooling process, the excess cooling capacity after meeting the user's supply can flow into the energy storage tank for storage, avoiding the waste of cooling capacity. When the electricity price is high during the day, the energy storage tank can be used for cooling first. When the cooling capacity of the energy storage tank is exhausted, the air source heat pump is used for cooling.

[0033] 4. This application achieves dual functions of cooling and heating through a single system, maximizes the use of renewable energy, and has the effect of peak shaving and valley filling, while ensuring the stability of the heat source in extremely cold weather. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application. For example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0035] Figure 1 This is a system architecture diagram of the energy supply system provided in this application in Embodiment 1.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Circulating pump; 2. Heat exchanger; 3. Air source heat pump; 31. Heating water supply inlet; 32. Heating water return inlet; 33. Cooling water supply inlet; 34. Cooling water return inlet; 4. Energy storage tank; 5. First thermometer; 6. Second thermometer; 7. Third thermometer; 8. Liquid level sensor;

[0038] V1, First electric regulating valve; V2, Second electric regulating valve; V3, Third electric regulating valve; V4, Fourth electric regulating valve; V5, Fifth electric regulating valve; V6, Sixth electric regulating valve; V7, Seventh electric regulating valve. Detailed Implementation

[0039] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0041] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0042] Promoting clean heating in northern regions in accordance with local conditions and driving the large-scale development of waste heat heating, by the end of 2025, all new urban buildings will fully implement green building standards, the renewable energy substitution rate of new public institutions and urban buildings will reach 8%, and the area of ​​new ultra-low energy consumption buildings and near-zero energy consumption buildings will increase by more than 20 million square meters compared with 2023. These are the current policy requirements for building heating in northern regions.

[0043] The inventors discovered that most existing buildings (public buildings) currently use municipal heat sources, while newly constructed buildings using air-source heat pump systems rely solely on electricity during extremely cold winters and lack necessary energy storage devices, resulting in significant energy waste. Therefore, currently implemented heating systems mainly fall into two categories: municipal heat sources and air-source heat pumps. However, municipal heat sources suffer from insufficient heating in extremely cold weather, while air-source heat pumps consume excessive amounts of electricity in the same conditions.

[0044] Based on this, the inventors proposed an energy supply system that couples an air source heat pump with a municipal heat source. This system combines an air source heat pump with a municipal heat source and incorporates an energy storage device to store energy from the air source heat pump, reducing energy waste, maximizing the use of renewable energy, and providing peak shaving and valley filling effects while ensuring the stability of the heat source in extremely cold weather. The system structure and operation of this air source heat pump and municipal heat source coupling energy supply system are described in detail below with reference to embodiments.

[0045] This embodiment provides an energy supply system coupled with municipal thermal power to an air source heat pump 3. The system includes an air source heat pump 3, a circulating pump 1, an energy storage tank 4, a heat exchanger 2, and a controller, wherein:

[0046] See Figure 1The air source heat pump 3 includes a heating unit for heat exchange and heating of the heating supply water and the heating return water returned from the user end. The heating unit has a heating supply water inlet 31 and a heating return water inlet 32. The heating supply water inlet 31 is connected to the user end supply water inlet, and the heating return water inlet 32 ​​is connected to the user end return water inlet through a circulation pump 1. A portion of the heating water produced by the air source heat pump 3 flows to the user end, and another portion flows to the energy storage tank 4. The energy storage tank 4 can supply water to the user end and receive the user end return water. The inlet and outlet of the heating supply water inlet 31, the heating return water inlet 32, and the energy storage tank 4 are respectively equipped with electric adjustment. The heat exchanger 2 has a municipal hot water inlet, a municipal hot water outlet, a heating water heat exchange inlet, and a heating water heat exchange outlet. The heat exchanger 2 can use the municipal hot water to stabilize the temperature of the heating water supply. The heating water with a stable temperature is sent to the user's water supply port. The heating water heat exchange outlet is equipped with an electric regulating valve. The controller can control the air source heat pump 3 to independently provide heating, or the air source heat pump 3 to store energy in the energy storage tank 4 while providing heating, or the energy storage tank 4 to independently provide heating, or the air source heat pump 3 to be coupled with the municipal hot water supply for heating.

[0047] This application uses an air source heat pump 3 to heat the heating water, and simultaneously stores excess heating water supplied to users through an energy storage tank 4, achieving energy storage and reducing energy waste. Furthermore, this application incorporates a heat exchanger to utilize municipal heating water for temperature and pressure stabilization. When the air source heat pump 3 is insufficient for heating in extremely cold weather, it can be coupled with the municipal heating water supply for heat exchange, ensuring the stability of the heat source in extremely cold weather. Moreover, the air source heat pump coupled with municipal heating solution provided in this application maximizes the use of renewable energy and has peak shaving and valley filling effects.

[0048] In this application, the air source heat pump 3 is an existing device, which includes an evaporator, a compressor, a condenser, and an expansion valve. Its working principle is as follows: First, the evaporator absorbs heat from the outdoor air (liquid low-temperature refrigerant flows into the evaporator, outdoor air flows through the evaporator under the action of a fan, the heat in the air is absorbed by the refrigerant, and the low-temperature liquid refrigerant evaporates into a low-temperature, low-pressure gaseous refrigerant). Second, the compressor consumes electrical energy to compress the low-temperature, low-pressure gas into a high-temperature, high-pressure gas (compressing the gas causes its volume to shrink rapidly, and its temperature and pressure to rise rapidly; what is discharged from the compressor becomes a high-temperature, high-pressure gaseous refrigerant). Third, the condenser… The high-temperature refrigerant gas releases heat to the circulating air or water indoors (the cold air or water flows through the condenser under the action of a fan or water pump; the high-temperature refrigerant gas releases heat to the cold air or water, raising its temperature and providing heating to the room; after releasing heat, the high-temperature gaseous refrigerant condenses into a medium-temperature, high-pressure liquid refrigerant). Finally, the expansion valve reduces the pressure and temperature of the refrigerant, preparing for the next heat absorption (the expansion valve causes a sudden drop in pressure and temperature of the medium-temperature, high-pressure liquid refrigerant, turning it back into a low-temperature, low-pressure liquid refrigerant, which is then sent to the outdoor evaporator to begin the next cycle).

[0049] Air source heat pumps have advantages such as high efficiency and energy saving, safety and environmental protection, and dual-use. Most existing air source heat pumps can be used in both winter and summer. They mainly use the internal "four-way reversing valve" to switch the flow direction of the refrigerant, thereby completely reversing the heat pump's heating mode in winter to the cooling mode in summer.

[0050] Therefore, the aforementioned air source heat pump 3 also includes a refrigeration unit for heat exchange and cooling of the cooling water supply and the cooling water returned from the user end. The refrigeration unit has a cooling water supply port 33 and a cooling water return port 34. The cooling water supply port 33 is connected to the user end water supply port, and the cooling water return port 34 is connected to the user end return port through the circulation pump 1. A portion of the cooling water produced by the air source heat pump 3 flows to the user end, and another portion of the cooling water produced flows to the energy storage tank 4. The energy storage tank 4 can supply water to the user end and receive the user end return water. The cooling water supply port 33, the cooling water return port 34, and the inlet and outlet of the energy storage tank 4 are respectively equipped with electric regulating valves. The controller can control the air source heat pump 3 to independently provide cooling, or the air source heat pump 3 to store energy in the energy storage tank 4 while providing cooling, or the energy storage tank 4 to independently provide cooling by adjusting the operation of each electric regulating valve in the system.

[0051] That is, the energy supply system provided in this application, which is an air source heat pump 3 coupled with municipal heat, can not only play a role in heating in winter, but also achieve cooling in summer using the air source heat pump 3, thus realizing the dual functions of heating and cooling in one system.

[0052] The following provides a detailed description of the specific piping connections for the air source heat pump 3, the circulating pump 1, the energy storage tank 4, and the heat exchanger 2.

[0053] The heating water inlet 31 and cooling water inlet 33 of the air source heat pump 3 are connected to the user end water inlet through the first water supply pipe, respectively. The heating water return inlet 32 ​​and cooling water return inlet 34 are connected to the outlet end of the circulating pump 1 through the first return water pipe, respectively. The outlet end of the circulating pump 1 is also connected to the heating water heat exchange inlet of the heat exchanger 2 through the third return water pipe, and the inlet end of the circulating pump 1 is connected to the user end return water inlet through the second return water pipe.

[0054] The energy storage tank 4 has an outlet pipe and a return pipe. The outlet pipe is connected to the first water supply pipe, and the return pipe is connected to the first return pipe. A liquid level sensor 8 is installed on the energy storage tank 4.

[0055] The municipal hot water supply outlet is connected to the first water supply pipe via the second water supply pipe.

[0056] The first water supply pipe is equipped with a first thermometer 5 for measuring the outlet water temperature of the energy storage tank 4, and a second thermometer 6 for measuring the water temperature flowing into the user's water supply port; the second return water pipe is equipped with a third thermometer 7, which is used to measure the temperature of the water flowing out of the user's return water port.

[0057] The first water supply pipe is equipped with a first electric regulating valve V1 and a third electric regulating valve V3. The first electric regulating valve V1 can stop the air source heat pump 3 and the energy storage tank 4 from supplying water to the user end, and the third electric regulating valve V3 can stop the air source heat pump 3 from supplying water to the user end. The first return water pipe is equipped with a second electric regulating valve V2, which can stop the circulation pump 1 from delivering return water to the user end to the air source heat pump 3. The third return water pipe is equipped with a fourth electric regulating valve V4, which can stop the circulation pump 1 from supplying water to the heating water inlet of the heat exchanger 2. The second water supply pipe is equipped with a fifth electric regulating valve V5, which can stop the heat exchanger 2 from supplying municipal hot water to the user end. The outlet pipe of the energy storage tank 4 is equipped with a sixth electric regulating valve V6, and the return water pipe of the energy storage tank 4 is equipped with a seventh electric regulating valve V7. The sixth electric regulating valve V6 can stop the energy storage tank 4 from supplying water to the user end, and the seventh electric regulating valve V7 can stop the circulation pump 1 from delivering return water to the user end to the energy storage tank 4. It should be noted that this system is also equipped with a water replenishment pump, which is connected to the circulation pump to replenish water to the system, such as injecting water into the system when it is first started, or automatically replenishing water during operation.

[0058] In a specific application example, the heat exchanger 2 of this application may be a plate heat exchanger.

[0059] The control method of this system is explained below:

[0060] The aforementioned liquid level sensor 8, first thermometer 5, second thermometer 6, third thermometer 7, first electric regulating valve V1, second electric regulating valve V2, third electric regulating valve V3, fourth electric regulating valve V4, fifth electric regulating valve V5, sixth electric regulating valve V6, and seventh electric regulating valve V7 are respectively connected to the controller signal.

[0061] During the winter night from 10 pm to 8 am the next morning (when electricity prices are low and electricity consumption is low), the air source heat pump is turned on to provide heating. At this time, the fourth electric regulating valve V4 and the fifth electric regulating valve V5 are closed, and the first electric regulating valve V1 adjusts the valve opening according to the temperature. The third thermometer obtains the return water temperature in real time. When the return water temperature is higher than 35℃, the opening of the first electric regulating valve V1 decreases, and the excess heat flows into the energy storage tank 4.

[0062] During peak energy consumption periods from 8 AM to 10 PM, the fourth electric regulating valve V4, the fifth electric regulating valve V5, the third electric regulating valve V3, and the second electric regulating valve V2 are closed. The first thermometer obtains the outlet water temperature of the energy storage tank in real time. When the outlet water temperature is below 40℃ (considering that some heat is lost in the heat storage tank), the third electric regulating valve V3 and the second electric regulating valve V2 are opened. When the liquid level in the energy storage tank 4 reaches the lowest point, the sixth electric regulating valve V6 and the seventh electric regulating valve V7 are closed, and only the third electric regulating valve V3 and the second electric regulating valve V2 are opened, with heating provided solely by the air source.

[0063] In extremely cold weather, when the air source heat pump is used for heating alone, the second thermometer obtains the user's water supply temperature in real time to monitor whether the air source heat pump is heating enough. When the water supply temperature is below 40°C, the fourth electric regulating valve V4 and the fifth electric regulating valve V5 are opened to add municipal heat source to ensure stable heat supply.

[0064] During summer, the fourth electric regulating valve V4 and the fifth electric regulating valve V5 are closed. From 10 pm to 8 am (when electricity prices are low and electricity consumption is low), during the off-peak energy consumption period, the air source heat pump is turned on for cooling. At this time, the first electric regulating valve V1 adjusts its opening according to the temperature, and the third thermometer obtains the return water temperature in real time. When the return water temperature is lower than 12℃, the opening of the first electric regulating valve V1 decreases, and the excess cooling energy flows into the energy storage tank 4.

[0065] During peak energy consumption periods from 8 AM to 10 PM, the third electric regulating valve V3 and the second electric regulating valve V2 are closed. The first thermometer obtains the outlet water temperature of the energy storage tank in real time. When the outlet water temperature is higher than 10℃ (considering that some heat is lost in the energy storage tank), the third electric regulating valve V3 and the second electric regulating valve V2 are opened. When the liquid level in the energy storage tank reaches the lowest point, the sixth electric regulating valve V6 and the seventh electric regulating valve V7 are closed, and only the third electric regulating valve V3 and the second electric regulating valve V2 are opened, with the air source heat pump providing cooling independently.

[0066] In summary, the energy supply system provided in this application couples an air-source heat pump with a municipal heat source. During the period from 10 PM to 8 AM the following morning when electricity prices are low, the air-source heat pump is used for heating. Excess heat after meeting user demand during the heating process can be stored in an energy storage tank, preventing heat waste. During the day when electricity prices are high, the energy storage tank can be used for heating first, and the air-source heat pump is used for heating when the energy storage tank is depleted. In extremely cold weather, the air-source heat pump coupled with the municipal heat source can be used for heating, which not only reduces electricity consumption but also ensures stable heating temperatures at the user end, reducing heating costs. Furthermore, the energy supply system provided in this application can not only provide heating but also cooling. During the period from 10 PM to 8 AM the following morning when electricity prices are low, the air-source heat pump is used for cooling, and excess cooling after meeting user demand during the cooling process can be stored in an energy storage tank, preventing cooling waste. During the day when electricity prices are high, the energy storage tank can be used for cooling first, and the air-source heat pump is used for cooling when the cooling capacity of the energy storage tank is depleted.

[0067] Therefore, this application achieves dual functions of cooling and heating through a single system, maximizing the use of renewable energy and having the effect of peak shaving and valley filling, while ensuring the stability of the heat source in extremely cold weather. Furthermore, the solution provided in this application only requires conventional heat pump units, heat exchangers, energy storage tanks, electric regulating valves, thermometers, controllers, and related piping connection components. The system architecture is simple, the control method is straightforward, and it can be applied to the renovation of existing buildings and the construction of new buildings. Moreover, the air source heat pump extracts heat from the outdoor air, which is almost unrestricted by geological conditions and allows for flexible deployment. In addition, this application utilizes off-peak electricity to directly drive the heat pump for heating and heat storage, and the energy storage tank releases heat during the day, resulting in significant peak shaving and valley filling effects and lower operating costs. Furthermore, the air source coupling solution provided in this application is a "ready-to-use" device that can be quickly connected to the existing municipal heating network, making it easy to construct and implement. Finally, the air source coupling solution provided in this application can be combined with municipal heating in extremely low temperatures. The heat pump does not require auxiliary electric heating, which can reduce power consumption, reduce the burden on the power grid, and make the heating system more stable in temperature and lower in operating costs. In addition, the air source heat pump has two functions in one unit, and can also cool in summer, achieving two functions in one system.

[0068] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0069] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. An energy supply system coupled with an air source heat pump and municipal thermal power, characterized in that, It includes an air source heat pump (3), a circulating pump (1), an energy storage tank (4), a heat exchanger (2), and a controller, wherein: The air source heat pump (3) includes a heating unit for exchanging heat and raising the temperature of the heating water supply and the heating return water returned from the user end. The heating unit has a heating water supply port (31) and a heating water return port (32). The heating water supply port (31) is connected to the user end water supply port, and the heating water return port (32) is connected to the user end water return port through the circulation pump (1). A portion of the heating water produced by the air source heat pump (3) flows to the user end, and another portion of the heating water produced flows to the energy storage tank (4). The energy storage tank (4) can supply water to the user end and receive the user end return water. The inlet and outlet of the heating water supply port (31), the heating water return port (32), and the energy storage tank (4) are respectively equipped with electric regulating valves. The heat exchanger (2) has a municipal hot water inlet, a municipal hot water outlet, a heating water heat exchange inlet and a heating water heat exchange outlet. The heat exchanger (2) can use the municipal hot water to stabilize the water temperature of the heating water supply. The heating water with stable temperature is sent to the user end water supply port. The heating water heat exchange outlet is equipped with an electric regulating valve. The controller can control the air source heat pump (3) to independently heat, or the air source heat pump (3) to store energy in the energy storage tank (4) while heating, or the energy storage tank (4) to independently heat, or the air source heat pump (3) to be coupled with municipal hot water supply for heating by adjusting the action of the electric regulating valve in the system.

2. The energy supply system of air source heat pump coupled with municipal thermal coupling according to claim 1, characterized in that, The air source heat pump (3) includes a refrigeration unit for exchanging heat and cooling the cooling water supply and the cooling return water returned from the user end. The refrigeration unit has a cooling water supply port (33) and a cooling water return port (34). The cooling water supply port (33) is connected to the user end water supply port, and the cooling water return port (34) is connected to the user end return water port through the circulation pump (1). A portion of the cooling water produced by the air source heat pump (3) flows to the user end, and another portion of the cooling water produced flows to the energy storage tank (4). The energy storage tank (4) can supply water to the user end and receive the user end return water. The cooling water supply port (33), the cooling water return port (34), and the inlet and outlet of the energy storage tank (4) are respectively equipped with electric regulating valves. The controller can control the air source heat pump (3) to independently provide cooling by adjusting the action of the electric regulating valve in the system, or the air source heat pump (3) to store energy in the energy storage tank (4) while providing cooling, or the energy storage tank (4) to independently provide cooling.

3. The energy supply system of air source heat pump coupled with municipal thermal coupling according to claim 2, characterized in that, The heating water supply port (31) and the cooling water supply port (33) are respectively connected to the user end water supply port through the first water supply pipe. The heating return water port (32) and the cooling return water port (34) are respectively connected to the outlet end of the circulating pump (1) through the first return water pipe. The inlet end of the circulating pump (1) is connected to the user end return water port through the second return water pipe. The outlet end of the circulating pump (1) is also connected to the heating water heat exchange inlet of the heat exchanger (2) through the third return water pipe. The energy storage tank (4) has an outlet pipe and a return pipe. The outlet pipe is connected to the first water supply pipe, and the return pipe is connected to the first return pipe. The municipal hot water supply outlet is connected to the first water supply pipe via a second water supply pipe; A liquid level sensor (8) is installed on the energy storage tank (4).

4. The energy supply system of air source heat pump coupled with municipal thermal coupling according to claim 3, characterized in that, The first water supply pipe is equipped with a first thermometer (5) for measuring the outlet water temperature of the energy storage tank (4) and a second thermometer (6) for measuring the water temperature flowing into the user end water supply port; the second return water pipe is equipped with a third thermometer (7) for measuring the temperature of the water flowing out from the user end return water port. The first water supply pipe is equipped with a first electric regulating valve (V1) and a third electric regulating valve (V3). The first electric regulating valve (V1) can shut off the air source heat pump (3) and the energy storage tank (4) from supplying water to the user end, and the third electric regulating valve (V3) can shut off the air source heat pump (3) from supplying water to the user end. A second electric regulating valve (V2) is installed on the first return water pipe. The second electric regulating valve can stop the circulation pump (1) from delivering user-end return water to the air source heat pump (3). The third return water pipe is equipped with a fourth electric regulating valve (V4), which can stop the circulation pump (1) from sending water to the heating water inlet of the heat exchanger (2). A fifth electric regulating valve (V5) is installed on the second water supply pipe. The fifth electric regulating valve (V5) can shut off the supply of municipal hot water from the heat exchanger (2) to the user end. A sixth electric regulating valve (V6) is installed on the outlet pipe of the energy storage tank (4), and a seventh electric regulating valve (V7) is installed on the return pipe of the energy storage tank (4). The sixth electric regulating valve (V6) can stop the energy storage tank (4) from supplying water to the user end, and the seventh electric regulating valve (V7) can stop the circulation pump (1) from delivering return water to the user end to the energy storage tank (4).

5. The energy supply system of air source heat pump coupled with municipal thermal coupling according to claim 4, characterized in that, The liquid level sensor (8), the first thermometer (5), the second thermometer (6), the third thermometer (7), the first electric regulating valve (V1), the second electric regulating valve (V2), the third electric regulating valve (V3), the fourth electric regulating valve (V4), the fifth electric regulating valve (V5), the sixth electric regulating valve (V6), and the seventh electric regulating valve (V7) are respectively connected to the controller signal. During the winter night from 10 pm to 8 am the next morning, when energy consumption is at its lowest, the controller sends a closing signal to the fourth electric regulating valve (V4) and the fifth electric regulating valve (V5) respectively, so that the air source heat pump (3) can independently provide heating. The controller can obtain the return water temperature in real time through the third thermometer (7), and the controller can output an action signal to the first electric regulating valve (V1) according to the return water temperature. After the controlled opening of the first electric regulating valve (V1) is reduced, part of the heating water produced by the air source heat pump (3) flows to the energy storage tank (4). During the peak energy consumption period from 8:00 AM to 10:00 PM in winter, the controller sends a closing signal to the fourth electric regulating valve (V4), the fifth electric regulating valve (V5), the second electric regulating valve (V2), and the third electric regulating valve (V3) respectively, so that the energy storage tank (4) can supply heat independently. The controller can obtain the outlet water temperature of the energy storage tank (4) in real time through the first thermometer (5), and the controller can send an opening signal to the second electric regulating valve (V2) and the third electric regulating valve (V3) according to the outlet water temperature, and send a closing signal to the seventh electric regulating valve (V7), so that the air source heat pump (3) can provide auxiliary heating. The controller can monitor the liquid level of the energy storage tank (4) in real time through the liquid level sensor (8). When the liquid level of the energy storage tank (4) reaches the lowest point, the controller sends a closing signal to the sixth electric regulating valve (V6), so that the air source heat pump (3) can provide heat independently. The controller can obtain the user-end water supply temperature in real time through the second thermometer (6) to monitor whether the air source heat pump (3) is heating enough. When the air source heat pump (3) is not heating enough, the controller sends an opening signal to the fourth electric regulating valve (V4) and the fifth electric regulating valve (V5) so that the air source heat pump (3) can be coupled with the municipal heating water supply for heating.

6. The energy supply system of air source heat pump coupled with municipal thermal coupling according to claim 4, characterized in that, The liquid level sensor (8), the first thermometer (5), the second thermometer (6), the third thermometer (7), the first electric regulating valve (V1), the second electric regulating valve (V2), the third electric regulating valve (V3), the fourth electric regulating valve (V4), the fifth electric regulating valve (V5), the sixth electric regulating valve (V6), and the seventh electric regulating valve (V7) are respectively connected to the controller signal. During the summer, the fourth electric regulating valve (V4) and the fifth electric regulating valve (V5) are closed. During the summer night from 10 pm to 8 am the next morning, when energy consumption is at its lowest, the cooling unit of the air source heat pump (3) is activated, allowing the air source heat pump (3) to provide independent cooling. The controller can obtain the return water temperature in real time through the third thermometer (7), and the controller can output an action signal to the first electric regulating valve (V1) according to the return water temperature. After the controlled opening of the first electric regulating valve (V1) is reduced, part of the cooling water produced by the air source heat pump (3) flows to the energy storage tank (4). During the peak energy consumption period from 8 a.m. to 10 p.m. in summer, the controller sends a closing signal to the second electric regulating valve (V2) and the third electric regulating valve (V3) respectively, so that the energy storage tank (4) can provide independent cooling. The controller can obtain the outlet water temperature of the energy storage tank (4) in real time through the first thermometer (5), and the controller can send an opening signal to the second electric regulating valve (V2) and the third electric regulating valve (V3) according to the outlet water temperature, and send a closing signal to the seventh electric regulating valve (V7), so that the air source heat pump (3) can provide auxiliary cooling. The controller can monitor the liquid level of the energy storage tank (4) in real time through the liquid level sensor (8). When the liquid level of the energy storage tank (4) reaches the lowest point, the controller sends a closing signal to the sixth electric regulating valve (V6), so that the air source heat pump (3) can provide independent cooling.

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