Air source heat pump heating system and operation method

Abstract

The invention relates to the technical field of heating systems, in particular to an air source heat pump heating system and an operation method. Comprising a heat supply loop and a heat utilization loop, the heat supply loop and the heat utilization loop are each provided with a circulating pump, heat exchange is conducted through a heat exchange part, the heat utilization loop is suitable for supplying heat to a heat supply terminal, the heat supply loop is provided with an air source heat pump, and the heat utilization loop, the heat exchange part and the heat supply terminal are each provided with a temperature measuring device. In the application, the industrial control system can start or stop the air source heat pump and the circulating pump according to the temperature of the heat utilization loop, the heat exchange part and the heat supply terminal detected by the temperature measuring equipment, so that the heating system can meet the heat supply demand at the peak of the heat load demand, and correspondingly reduce the heat supply at the valley of the heat load demand; and energy waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heating systems, and particularly relates to an air source heat pump heating system and an operation method thereof. Background Art

[0002] At present, as a device that utilizes low-grade heat energy in the air for heating, the air source heat pump has the advantages of energy conservation, environmental protection, high efficiency, etc. For heating terminals, such as industrial factories in mining areas, the heat load demand has large fluctuations. However, the heating capacity of the existing air source heat pump is relatively fixed. For example, when the heat load demand is at a low ebb, the heating capacity may be excessive, resulting in energy waste. Summary of the Invention

[0003] In view of this, the present invention provides an air source heat pump heating system and an operation method thereof to solve the problem of energy waste caused by large fluctuations in the heat load demand of the heating terminal.

[0004] In a first aspect, the present invention provides an air source heat pump heating system, including:

[0005] A heating circuit and a heat-using circuit. The heating circuit and the heat-using circuit are both provided with circulation pumps and exchange heat through a heat exchange part. The heat-using circuit is adapted to supply heat to a heating terminal. The heating circuit is provided with an air source heat pump. Temperature measuring devices are provided on the heat-using circuit, the heat exchange part, and the heating terminal.

[0006] A power supply module, which is respectively connected to the air source heat pump, the circulation pump, and the temperature measuring device, and is adapted to supply power to the air source heat pump, the circulation pump, and the temperature measuring device.

[0007] An industrial control system, which is respectively connected to the air source heat pump, the circulation pump, and the temperature measuring device.

[0008] In the present application, the industrial control system can turn on or off the air source heat pump and the circulation pump according to the temperatures detected by the temperature measuring devices on the heat-using circuit, the heat exchange part, and the heating terminal, so that the heating system can meet the heating demand during the peak of the heat load demand and reduce the heating accordingly during the low ebb of the heat load demand, avoiding energy waste.

[0009] In an optional implementation manner, it further includes:

[0010] An electric auxiliary heating device, which is arranged on the heat-using circuit and is located between the outlet of the heat exchange part and the heating terminal. The electric auxiliary heating device is connected to the power supply module.

[0011] The electric auxiliary heating device can ensure that the heating system can meet the heating demand during the peak of the heat load demand. The electric auxiliary heating device can directly supply heat to the heating terminal through the heat-using circuit.

[0012] In an alternative embodiment, the power supply module includes:

[0013] A solar power generation device and a wind power generation device, which are respectively connected to an air source heat pump, a circulation pump, a temperature measuring device, and an electric auxiliary heating device, and are adapted to supply power to the air source heat pump, the circulation pump, the temperature measuring device, and the electric auxiliary heating device.

[0014] The power supply module can generate electricity through solar energy and wind energy, and supply power to the air source heat pump, the circulation pump, and the temperature measuring device, which can reduce the electricity load of the heating system and realize the "green electricity" supply of the heating system.

[0015] In an alternative embodiment, the power generation amount of the solar power generation device is not less than the daytime electricity consumption of the heating circuit and the heat-using circuit, and the power generation amount of the wind power generation device is not less than the nighttime electricity consumption of the heating circuit and the heat-using circuit.

[0016] The daytime electricity consumption and nighttime electricity consumption of the heating circuit and the heat-using circuit can be respectively satisfied by the solar power generation device and the wind power generation device.

[0017] In an alternative embodiment, the power supply module further includes:

[0018] An energy storage device, which is connected to the solar power generation device and the wind power generation device, is adapted to store the surplus electric energy of the solar power generation device and the wind power generation device, and is connected to the air source heat pump and is adapted to supply power to the air source heat pump.

[0019] The surplus electric energy of the solar power generation device and the wind power generation device can be stored to prevent waste of electric energy.

[0020] In an alternative embodiment, the capacity of the energy storage device is not less than the sum of the daytime surplus demand electricity consumption and the nighttime electricity consumption of the heating circuit and the heat-using circuit.

[0021] The capacity of the energy storage device can meet the electricity demand of the heating circuit and the heat-using circuit, and in extreme cases, such as insufficient solar energy and windless weather, the electricity demand of the heating circuit and the heat-using circuit can be met through the energy storage of the energy storage device.

[0022] In an alternative embodiment, the temperature measuring device includes:

[0023] A first temperature measuring device, which is arranged inside the heat exchange part and is adapted to detect the internal temperature of the heat exchange part;

[0024] A second temperature measuring device, which is arranged between the outlet of the heat exchange part and the electric auxiliary heating device and is adapted to detect the temperature in the heat-using circuit between the heat exchange part and the electric auxiliary heating device;

[0025] A third temperature measuring device, which is arranged between the heat supply terminal and the heat exchange part, is adapted to detect the temperature in the heat-using loop between the heat supply terminal and the heat exchange part;

[0026] A fourth temperature measuring device, which is arranged inside the heat supply terminal, is adapted to detect the internal temperature of the heat supply terminal.

[0027] In an optional embodiment, the heat exchange part is a buffer water tank, and the buffer water tank is connected with a water replenishing end adapted to replenish water to the buffer water tank.

[0028] In an optional embodiment, the industrial control system completes the real-time prediction of the heat-using load of the heat supply terminal according to the historical data of the heat-using load of the heat supply terminal, the predicted weather data of the weather station and the real-time monitoring data, and formulates an air source heat pump coupled with electric auxiliary heating energy supply scheme with the goal of minimizing energy consumption.

[0029] In a second aspect, the present invention also provides an operation method for an air source heat pump heating system, which is applicable to the air source heat pump heating system as described above, and includes the following steps:

[0030] When the detected temperature of the first temperature measuring device is less than the first temperature, turn on the air source heat pump and the circulation pump on the heat supply loop;

[0031] When the detected temperature of the first temperature measuring device is greater than the second temperature, turn off the air source heat pump and the circulation pump on the heat supply loop, and the second temperature is greater than the first temperature;

[0032] When the detected temperature of the second temperature measuring device is less than the third temperature, turn on the electric auxiliary heating device, and the third temperature is less than the first temperature;

[0033] When the detected temperature of the second temperature measuring device is greater than the first temperature, turn off the electric auxiliary heating device;

[0034] When the detected temperature of the third temperature measuring device is less than the fourth temperature, turn on the circulation pump on the heat-using loop, and the fourth temperature is less than the third temperature;

[0035] When the detected temperature of the third temperature measuring device is greater than the first temperature, turn off the circulation pump on the heat-using loop;

[0036] When the detected temperature of the fourth temperature measuring device is less than the fifth temperature, turn on the circulation pump on the heat-using loop, and the fifth temperature is less than the fourth temperature;

[0037] When the detected temperature of the fourth temperature measuring device is greater than the sixth temperature, turn off the circulation pump on the heat-using loop, and the sixth temperature is less than the fourth temperature and the sixth temperature is greater than the fifth temperature.

[0038] This application can dynamically configure the air source heat pump, circulation pump, and electric auxiliary heating device according to the actual working conditions, such as the temperatures of the heat exchange section, heat-using circuit, and heat supply terminal, so that the heating system can meet the heating demand during the peak heat load demand at the heat supply terminal, and reduce the heating accordingly during the low valley of the heat load demand, avoiding waste of energy and achieving intelligent heating of the heat supply terminal. Brief Description of the Drawings

[0039] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0041] Description of the Reference Numerals:

[0042] 1. Heat supply circuit; 2. Heat-using circuit; 3. Heat supply terminal; 4. Air source heat pump; 5. Industrial control system; 6. Electric auxiliary heating device; 7. Solar power generation device; 8. Wind power generation device; 9. Energy storage device; 10. First temperature measuring device; 11. Second temperature measuring device; 12. Third temperature measuring device; 13. Fourth temperature measuring device; 14. Buffer water tank; 15. Resin tank; 16. Brine tank; 17. Weather station; 18. Inverter. Detailed Embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] At present, as a device that utilizes the low-grade heat energy in the air for heating, the air source heat pump has the advantages of energy conservation, environmental protection, and high efficiency. On the one hand, in an ultra-low temperature environment, the heating efficiency (COP) of the air source heat pump drops significantly. For some models, the heating capacity is only 30%-50% of that under normal temperature conditions, unable to meet all the heating demands of industrial plants in mining areas (heating terminals). The air source heat pump can be coupled with electric auxiliary heating, which can not only provide more reliable heating guarantee in low temperature environments, but also improve the overall energy efficiency of the system and reduce operating costs. On the other hand, the heat load demand of industrial plants in mining areas has large fluctuations, while the heating capacity of the air source heat pump coupled with electric auxiliary heating is relatively fixed. During peak heat load demands, it may not be able to meet all the heating demands; during low heat load demands, the heating capacity may be excessive, resulting in energy waste. The real-time electricity price, ambient temperature, and end load demand can be analyzed through an intelligent heating industrial control system to dynamically adjust the operation ratio of the heat pump and electric auxiliary heating to achieve minimum energy consumption.

[0045] The following combines Figure 1 , to describe the embodiments of the present invention.

[0046] Embodiment 1

[0047] As Figure 1 shown, the present invention provides an air source heat pump heating system, including:

[0048] A heating circuit 1 and a heat-using circuit 2. Both the heating circuit 1 and the heat-using circuit 2 are provided with circulation pumps and exchange heat through a heat exchange part. The heat-using circuit 2 is suitable for heating a heating terminal 3. The heating circuit 1 is provided with an air source heat pump 4. The heat-using circuit 2, the heat exchange part, and the heating terminal 3 are all provided with temperature measuring devices; the heating terminal 3 can be a building such as an industrial plant in a mining area, and the heat load can be a heating load for heating. The air source heat pump 4 can at least include a compressor, an evaporator, and a condenser. The evaporator, the compressor, and the condenser are sequentially connected to form a heat exchange working medium circuit. Both the heating circuit 1 and the heat-using circuit 2 are circuits formed by pipelines and exchange heat at the heat exchange part. The pipeline is internally provided with a heat exchange medium. Specifically, the heat exchange medium in the heating circuit 1 becomes a high-temperature heat exchange medium after passing through the air source heat pump 4, becomes a low-temperature cooling medium after passing through the heat exchange part, and then enters the air source heat pump 4 through the circulation pump. The air source heat pump 4 is connected in series with the circulation pump on the heating circuit 1. The heat exchange medium in the heat-using circuit 2 becomes a low-temperature cooling medium after passing through the heating terminal 3, becomes a high-temperature cooling medium after passing through the heat exchange part, and then enters the heating terminal 3 through the circulation pump on the heat-using circuit 2. The circulation pump on the heat-using circuit 2 can be a heating circulation pump. Specifically, there can be multiple heating circulation pumps and they are connected in parallel on the heat-using circuit 2. The air source heat pump 4 can also be multiple and are connected in parallel on the heating circuit 1.

[0049] In the circulating pumps of the heating circuit 1 and the heat-using circuit 2, fixed-speed circulating pumps or variable-frequency circulating pumps can be used. The variable-frequency circulating pumps can dynamically adjust the rotational speed according to the real-time temperature signals received by the industrial control system 5, so as to precisely control the flow rate and circulation speed of the heat exchange medium. For example, when it is detected that the temperature of the heating terminal 3 drops rapidly, the variable-frequency pump can automatically increase the rotational speed to increase the delivery volume of the heat medium. Through variable-frequency control, more refined flow regulation can be achieved, avoiding energy consumption losses caused by frequent start-stop of fixed-speed pumps, while improving the system response speed, further reducing energy waste, and extending the service life of the equipment.

[0050] A power supply module, which is respectively connected to the air-source heat pump 4, the circulating pump, and the temperature measuring device, and is suitable for supplying power to the air-source heat pump 4, the circulating pump, and the temperature measuring device; the circulating pump on the heating circuit 1 can be a heat pump circulating pump. Specifically, multiple heat pump circulating pumps can be connected in parallel on the heating circuit 1.

[0051] An industrial control system 5, which is respectively connected to the air-source heat pump 4, the circulating pump, and the temperature measuring device, and can be an intelligent heating industrial control system 5. The temperature measuring device is suitable for transmitting the detected temperature signal to the industrial control system 5.

[0052] On the basis of the original temperature measuring devices of the heat-using circuit 2, the heat exchange part, and the heating terminal 3, a multi-point redundant temperature measuring device (such as a distributed optical fiber sensor) is added, and an adaptive fuzzy control algorithm is integrated through the industrial control system 5. The algorithm can dynamically optimize the start-stop thresholds of the air-source heat pump 4 and the circulating pump according to the weighted average of the multi-point temperature data. It can improve the comprehensiveness and reliability of temperature monitoring, and avoid misjudgment caused by single-point temperature measurement errors; the adaptive algorithm can real-time correct the control logic, adapt to complex working condition changes, further optimize the energy consumption distribution, and improve the heating accuracy.

[0053] In this application, the industrial control system 5 can turn on or off the air-source heat pump 4 and the circulating pump according to the temperatures detected by the temperature measuring device on the heat-using circuit 2, the heat exchange part, and the heating terminal 3, so that the heating system can meet the heating demand during the peak of the heat load demand, and reduce the heating correspondingly during the trough of the heat load demand, avoiding waste of energy.

[0054] In the air-source heat pump 4 unit of the heating circuit 1, multiple small heat pumps connected in parallel can be used instead of a single large heat pump. Each heat pump is independently connected to the industrial control system 5 and starts and stops in stages according to the real-time heat load demand. For example, only some heat pumps are started at low load, and all units are gradually started at high load. It can improve the flexibility of system regulation, avoid the phenomenon of "using a big horse to pull a small cart", and reduce the operating energy consumption under partial load; at the same time, the redundant design can improve the system reliability, and the single unit failure can still maintain partial heating capacity to ensure the continuous heating demand of the mining area workshops.

[0055] In an alternative embodiment, it further includes:

[0056] An electric auxiliary heating device 6 is provided on the heat-using circuit 2 and is located between the outlet of the heat exchange part and the heat supply terminal 3. The electric auxiliary heating device 6 is connected to the power supply module. The electric auxiliary heating device 6 includes, but is not limited to, an electrode boiler, an electric hot water boiler, and a pipeline electric heater. The total heating amount of the air source heat pump 4 and the electric auxiliary heating device 6 should be greater than the heating load of the mining industrial plant buildings to ensure sufficient heating supply.

[0057] The electric auxiliary heating device 6 can ensure that the heating system can meet the heating demand during the peak period of heat load demand. The electric auxiliary heating device 6 can directly supply heat to the heat supply terminal 3 through the heat-using circuit 2.

[0058] A multi-stage power module (such as low, medium, and high power gears) is set in the electric auxiliary heating device 6 and is started in stages by the industrial control system 5 according to the real-time temperature demand of the heat supply terminal 3. For example, when it is detected that the temperature at the outlet of the heat exchange part is lower than the threshold value, the low-power module is preferentially started; if the temperature continues to drop, the medium and high-power modules are gradually enabled. It can avoid the waste of electric energy caused by the full-power operation of the electric auxiliary heating device 6, reduce the impact of peak load on the power grid, extend the service life of the equipment, and reduce the operation cost at the same time.

[0059] The electric auxiliary heating device 6 can be directly connected to the energy storage device 9 in the power supply module, and the solar or wind green electricity stored in the energy storage device 9 is preferentially used for power supply. When the energy storage power is insufficient, it is then switched to the power grid or other backup power sources. The industrial control system 5 dynamically controls the power supply source of the electric auxiliary heating device 6 according to the energy storage power state. It can maximize the utilization of green electricity resources, reduce fossil energy consumption and carbon emissions; through energy storage for peak shaving and valley filling, it can reduce the power consumption cost of the power grid and improve the energy independence of the system.

[0060] A waste heat recovery preheater can be added to the inlet end of the electric auxiliary heating device 6 to preheat the low-temperature medium entering the electric auxiliary heating device 6 by using the waste heat dissipated from the air source heat pump 4 or the factory building roof, reducing the energy consumption required for the electric auxiliary heating device 6 to heat the medium to the target temperature. It can reduce the electric energy consumption of the electric auxiliary heating device 6, improve the overall system energy efficiency; through waste heat recovery, the secondary utilization of energy is realized, and the operation cost is further reduced.

[0061] The electric auxiliary heating device 6 can be designed as multiple independent modules (such as small electric heater groups), which are connected in parallel on the heat-using circuit 2, and some modules are dynamically started and stopped by the industrial control system 5 according to the heat load demand. For example, only 1-2 modules are started at low load, and gradually increased to all modules running at high load. It can improve the heating regulation accuracy and flexibility, avoid the energy waste caused by "overheating"; the modular design is convenient for maintenance and expansion, and reduces the impact of single-point failure on the system.

[0062] In an alternative embodiment, the power supply module includes:

[0063] The solar power generation device 7 and the wind power generation device 8 are respectively connected to the air source heat pump 4, the circulation pump, the temperature measuring device, and the electric auxiliary heating device 6, and are adapted to supply power to the air source heat pump 4, the circulation pump, the temperature measuring device, and the electric auxiliary heating device 6.

[0064] A solar thermal power generation module can be added to the solar power generation device 7 to complement the existing photovoltaic power generation. Solar thermal power generation generates high-temperature steam through concentrating solar heat to drive a turbine to generate electricity, and at the same time stores thermal energy for auxiliary power supply to the heating system at night or on cloudy days. It can improve the utilization rate of solar energy, and the heat storage characteristics of solar thermal power generation can stabilize the output of green electricity; the thermal energy is directly used for preheating the heating circuit 1, reducing the energy consumption of the electric auxiliary heating device 6, and realizing cascaded utilization of energy.

[0065] The power supply module can generate electricity through solar energy and wind energy, and supply power to the air source heat pump 4, the circulation pump, and the temperature measuring device, which can reduce the electricity load of the heating system and realize the "green electricity" supply of the heating system.

[0066] In an optional embodiment, the power generation amount of the solar power generation device 7 is not less than the daytime electricity consumption of the heating circuit 1 and the heat-using circuit 2, and the power generation amount of the wind power generation device 8 is not less than the nighttime electricity consumption of the heating circuit 1 and the heat-using circuit 2.

[0067] For example, the capacity of the solar power generation device 7 should be calculated in combination with the total power of the electrical equipment (power supply to the air source heat pump 4, the circulation pump, and the temperature measuring device) and the daytime power consumption time. Assuming that the total power of the daytime electrical equipment is 1000 kW, the daytime power consumption time is 8 hours, the local sunshine condition is good, and the conversion efficiency of the solar panel is 20%, then the required capacity of the solar power generation device 7 is 5000 kW; wind power generation is mainly used to supplement the deficiency of solar power generation, and the capacity should be calculated in combination with the total power of the electrical equipment and the nighttime power consumption time. Assuming that the total power of the nighttime electrical equipment is 1000 kW, the local minimum wind speed is 3 m / s, and a wind turbine with an output power of 50 kW at a wind speed of 3 m / s is selected, then at least 20 such wind turbines need to be configured, with a total capacity of 1000 kW, to meet the nighttime electricity demand. It should be noted that the capacity calculation of the solar power generation device 7 needs to refer to the conversion efficiency.

[0068] The daytime electricity consumption and nighttime electricity consumption of the heating circuit 1 and the heat-using circuit 2 can be respectively met by the solar power generation device 7 and the wind power generation device 8.

[0069] In an optional embodiment, the power supply module further includes:

[0070] The energy storage device 9 is connected to the solar power generation device 7 and the wind power generation device 8, and is adapted to store the surplus electric energy of the solar power generation device 7 and the wind power generation device 8. It is connected to the air source heat pump 4 and is adapted to supply power to the air source heat pump 4. Among them, the power supply module and the energy storage device 9 can both be connected to the air heat pump through the inverter 18.

[0071] It can store the surplus electric energy of the solar power generation device 7 and the wind power generation device 8, preventing waste of electric energy.

[0072] In an alternative embodiment, the capacity of the energy storage device 9 is not less than the sum of the daytime surplus demand electricity consumption and the nighttime electricity consumption of the heating circuit 1 and the heat-using circuit 2.

[0073] For example, the energy storage device 9 is mainly used to store the surplus electric energy of solar and wind power generation, and to provide power support under conditions of no wind and no light. According to the daytime and nighttime electricity demands, as well as the predicted electricity generation of solar and wind power, the capacity of the required energy storage device 9 is calculated. Assuming the daytime surplus demand electricity consumption is 500 kWh, the nighttime electricity demand is 6000 kWh, and the charge-discharge efficiency of the energy storage device 9 is 90%, then the required capacity of the energy storage device 9 is 7222.22 kWh. Considering the margin, an energy storage device 9 with a capacity of 7500 kWh can be selected.

[0074] The capacity of the energy storage device 9 can meet the electricity demands of the heating circuit 1 and the heat-using circuit 2, and in extreme cases, such as insufficient solar energy and windless weather, the electricity demands of the heating circuit 1 and the heat-using circuit 2 can be met through the energy storage of the energy storage device 9.

[0075] In an alternative embodiment, the temperature measuring device includes:

[0076] The first temperature measuring device 10 is arranged inside the heat exchange part and is adapted to detect the internal temperature of the heat exchange part;

[0077] The second temperature measuring device 11 is arranged between the outlet of the heat exchange part and the electric auxiliary heating device 6 and is adapted to detect the temperature in the heat-using circuit 2 between the heat exchange part and the electric auxiliary heating device 6;

[0078] The third temperature measuring device 12 is arranged between the heat supply terminal 3 and the heat exchange part and is adapted to detect the temperature in the heat-using circuit 2 between the heat supply terminal 3 and the heat exchange part;

[0079] The fourth temperature measuring device 13 is arranged inside the heat supply terminal 3 and is adapted to detect the internal temperature of the heat supply terminal 3.

[0080] In an optional embodiment, the heat exchange part is a buffer water tank 14, and the buffer water tank 14 is connected to a water replenishment end suitable for replenishing water to the buffer water tank 14. The buffer water tank 14 can be replenished with tap water. Specifically, the water replenishment end may include a resin tank 15 and a salt solution tank 16, and the tap water can pass through the resin tank 15 and the salt solution tank 16 respectively, or pass through the resin tank 15 and the salt solution tank 16 in sequence, and be connected to the buffer water tank 14.

[0081] The industrial control system 5 may include a real-time monitoring module, an optimization control operation module, a smart operation and maintenance module, a diagnosis and early warning module, a safety management module, and a model microservice system, which is suitable for real-time monitoring, control, alarm, and statistics of the heating conditions of the heat-using module. The industrial control system 5 may be connected to the weather station 17.

[0082] In an optional embodiment, the industrial control system 5 completes the real-time prediction of the heat load of the heating terminal 3 based on the historical data of the heat load of the heating terminal 3, the weather data predicted by the meteorological station 17 and the real-time monitoring data, and formulates an air source heat pump 4 coupled with electric auxiliary heating energy supply plan with the goal of minimizing energy consumption.

[0083] Specifically, the industrial control system 5 includes a real-time monitoring module, an optimization control operation module, an intelligent operation and maintenance module, a diagnosis and warning module, a safety management module and a model microservice system. Each module works together and is connected to the weather station 17 to form a complete intelligent heating control network. The specific functions are as follows:

[0084] Real-time monitoring module: Through the sensor network (such as temperature, pressure, and flow sensors) of the heating terminal 3, air source heat pump 4, electric auxiliary heating device 6, and power supply module, the heating system operation data (such as buffer water tank 14 water temperature T1 / T2 / T3, indoor temperature T4, heat pump power, green electricity output, etc.) is collected in real time and transmitted to the industrial control system 5 database through the Internet of Things protocol.

[0085] Optimization control operation module: Based on the load forecast results generated by the model microservice system, combined with the real-time electricity price and the temperature / wind speed / light forecast data for the next 24 hours provided by the weather station 17, the start / stop priority and power allocation ratio of the air source heat pump 4 and the electric auxiliary heating device 6 are dynamically adjusted. For example, the air source heat pump 4 is started first when there is surplus green electricity at night, and the electric auxiliary heating device 6 is enabled to supplement the heating at extremely low temperatures.

[0086] Smart operation and maintenance module: Integrates equipment health status assessment algorithm, predicts equipment life and generates maintenance plan by analyzing parameters such as circulating pump vibration frequency and compressor operating current; supports remote fault diagnosis and firmware upgrade.

[0087] Diagnostic and Warning Module: Set multi-level warning thresholds (such as water temperature deviation ≥ 5°C, energy storage power below 20%, equipment efficiency decreased by 10%), trigger audible and visual alarms and push them to the operation and maintenance personnel through the mobile terminal.

[0088] Safety Management Module: Adopt an encrypted communication protocol to ensure data security, monitor the risks of system overload, leakage, and short circuit in real time, and automatically cut off the faulty circuit.

[0089] Model Microservice System: Built-in heating load prediction models (such as LSTM neural network), energy consumption optimization models (such as dynamic programming algorithm), and support online training of models and parameter updates.

[0090] The industrial control system 5 can optimize the load prediction based on machine learning. In the model microservice system, a deep learning algorithm (such as the Transformer time series prediction model) that integrates meteorological data and historical load data is used to replace the traditional regression model. The algorithm generates an hourly load prediction curve by analyzing the thermal inertia characteristics of the mining area factory buildings, the law of personnel activities, and weather mutation events (such as cold snaps). For example, the electric auxiliary heating device 6 is started 12 hours in advance before the cold snap arrives to preheat the pipeline. It can improve the load prediction accuracy, reduce energy waste caused by prediction deviation, and dynamically adjust the preheating strategy to avoid heating delay.

[0091] Furthermore, a distributed edge computing node deployment can be adopted. The real-time monitoring module and the optimized control operation module of the industrial control system 5 are split into multiple edge computing nodes and deployed near key equipment such as the heating terminal 3 and the air source heat pump 4 unit. Each node is interconnected through a 5G private network to achieve local data processing and fast response. For example, when a node detects a sudden drop in temperature in a local area, it can independently start the adjacent electric auxiliary heating device 6 without waiting for instructions from the central system. It can reduce the communication delay to the millisecond level and improve the system response speed; the decentralized computing enhances the system's anti-single-point failure ability.

[0092] Furthermore, a multi-level warning and adaptive fault tolerance mechanism can be introduced. Add a three-level fault tolerance strategy in the diagnostic and warning module:

[0093] First-level warning (slight anomaly): Automatically adjust the operation parameters (such as increasing the rotation speed of the circulation pump);

[0094] Second-level warning (moderate fault): Switch to standby equipment (such as enabling redundant heat pump units);

[0095] Third-level warning (severe fault): Start the emergency heating mode (such as switching to diesel generator power supply). Beneficial effects: Realize hierarchical fault handling, reduce unnecessary shutdowns, and ensure continuous heating of the mining area factory buildings under extreme working conditions.

[0096] Furthermore, demand response linkage with smart grid can be introduced. The industrial control system 5 is connected to the smart grid platform of the mining area to obtain the grid load status and electricity price signals in real time. When the grid is in the peak electricity price period, the energy storage device 9 is used for power supply first; when the grid provides demand response subsidies, the power of the electric auxiliary heating device 6 is actively reduced in exchange for economic benefits. The electricity cost can be reduced; the system economy can be improved by participating in the peak load regulation of the grid.

[0097] The data fusion and load forecasting phase includes:

[0098] Synchronize weather station 17 data (temperature, wind speed, sunshine intensity) and historical load data every hour;

[0099] Generate the load forecast curve for the next 6 hours / 24 hours through the model microservice system;

[0100] The optimal energy supply combination is calculated based on the real-time green electricity supply (solar / wind power generation and remaining energy storage capacity).

[0101] The dynamic control execution phase includes:

[0102] When the water temperature T1 of the buffer water tank 14 is ≤ 45°C, the air source heat pump 4 is started, and the compressor frequency is adjusted according to the COP value;

[0103] If the load forecast shows that the heat demand will increase in the next two hours, the energy storage capacity will be increased to more than 80% in advance;

[0104] The energy storage device 9 is charged first during the electricity price valley period (such as at night), and is discharged first during the electricity price peak period (such as in the morning and evening).

[0105] The energy efficiency closed-loop optimization phase includes:

[0106] Generate energy consumption analysis reports daily, compare actual and predicted data, and automatically correct model parameters;

[0107] Evaluate equipment operating efficiency monthly and trigger maintenance instructions from the smart operation and maintenance module for equipment whose energy efficiency is below the threshold.

[0108] This application can improve the system's comprehensive energy efficiency (SEER) and reduce annual operating costs through machine learning and real-time optimization; multi-level early warning and edge computing design can improve the system's availability and meet the continuous heating needs of the mining area; improve the utilization rate of green electricity and reduce carbon dioxide emissions annually; reduce equipment failure rate and maintenance costs.

[0109] Example 2

[0110] The present invention also provides an operating method of an air source heat pump heating system, which is applicable to the air source heat pump heating system as described above, and comprises the following steps:

[0111] When the detected temperature of the first temperature measuring device 10 is less than the first temperature, the air source heat pump 4 and the circulation pump on the heating circuit 1 are turned on;

[0112] When the detected temperature of the first temperature measuring device 10 is greater than the second temperature, the air source heat pump 4 and the circulation pump on the heating circuit 1 are turned off, and the second temperature is greater than the first temperature;

[0113] When the detected temperature of the second temperature measuring device 11 is less than the third temperature, the electric auxiliary heating device 6 is turned on, and the third temperature is less than the first temperature;

[0114] When the detected temperature of the second temperature measuring device 11 is greater than the first temperature, the electric auxiliary heating device 6 is turned off;

[0115] When the detected temperature of the third temperature measuring device 12 is less than the fourth temperature, the circulation pump on the heat - using circuit 2 is turned on, and the fourth temperature is less than the third temperature;

[0116] When the detected temperature of the third temperature measuring device 12 is greater than the first temperature, the circulation pump on the heat - using circuit 2 is turned off;

[0117] When the detected temperature of the fourth temperature measuring device 13 is less than the fifth temperature, the circulation pump on the heat - using circuit 2 is turned on, and the fifth temperature is less than the fourth temperature;

[0118] When the detected temperature of the fourth temperature measuring device 13 is greater than the sixth temperature, the circulation pump on the heat - using circuit 2 is turned off, and the sixth temperature is less than the fourth temperature and the sixth temperature is greater than the fifth temperature.

[0119] Specifically, in the heating mode, the heat pump circulation pump is turned on. When the industrial control system 5 detects that the water temperature T1 in the buffer water tank 14 ≤ 45 °C (the first temperature), the air source heat pump 4 is turned on;

[0120] When the system detects that the water temperature T1 in the buffer water tank 14 ≥ 50 °C (the second temperature), the air source heat pump 4 is turned off;

[0121] The air source heat pump 4 circulation pump is linked with the air source heat pump 4;

[0122] When the outlet water temperature T2 of the buffer water tank 14 ≤ 40 °C (the third temperature), it indicates that the heating capacity of the air source heat pump 4 cannot meet the indoor heating demand, and at this time, the electric auxiliary heating device 6 is turned on.

[0123] When T2 ≥ 45 °C (the first temperature), the electric auxiliary heating device 6 is turned off; when the return water temperature T3 of the buffer water tank 14 ≤ 38 °C (the fourth temperature), the heating circulation pump is turned on;

[0124] When T3 ≥ 45 °C (the first temperature), the heating circulation pump is turned off;

[0125] When the indoor temperature T4 of the factory building ≤ 5 °C (the fifth temperature), the heating circulation pump is turned on;

[0126] When T4 ≥ 10 °C (the sixth temperature), the heating circulation pump is turned off.

[0127] This application can dynamically configure the air source heat pump 4, the circulation pump, and the electric auxiliary heating device 6 according to the actual working conditions, such as the temperatures of the heat exchange part, the heat-using circuit 2, and the heat supply terminal 3, so that the heating system can meet the heat supply demand during the peak heat load demand of the heat supply terminal 3, and reduce the heat supply correspondingly during the low valley of the heat load demand, avoiding waste of energy. It realizes intelligent heat supply to the heat supply terminal 3.

[0128] The purpose of the present invention is to overcome the problems of low heating efficiency and insufficient heat supply on demand of the air source heat pump 4 in the prior art at ultra-low temperatures, so as to provide an ultra-low temperature air source heat pump 4 coupled with an electric auxiliary heating intelligent heat supply system and an operation method.

[0129] The present invention uses the "green" electricity generated by the mine area solar power generation set, the wind power generation set, and the energy storage device 9 to supply power to the air source heat pump 4 and the electric auxiliary heating device 6, realizing the "green" electricity supply for the heating of the mine area factory buildings and achieving the goal of zero-carbon heat supply.

[0130] The present invention adopts an intelligent heat supply industrial control system 5 to realize the coupling of the air source heat pump 4 and the electric auxiliary heating for heat supply, achieving the goal of intelligent heat supply.

[0131] The present invention defines a zero-carbon intelligent heat supply solution for the mine area factory buildings.

[0132] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An air source heat pump heating system, characterized in that: include: A heat supply circuit (1) and a heat utilization circuit (2), wherein the heat supply circuit (1) and the heat utilization circuit (2) are both provided with a circulation pump and heat is exchanged through a heat exchange unit, the heat utilization circuit (2) is suitable for providing heat to a heat supply terminal (3), the heat supply circuit (1) is provided with an air source heat pump (4), and the heat utilization circuit (2), the heat exchange unit and the heat supply terminal (3) are all provided with temperature measuring equipment; A power supply module is connected to the air source heat pump (4), the circulation pump and the temperature measuring device respectively, and is suitable for supplying power to the air source heat pump (4), the circulation pump and the temperature measuring device; The industrial control system (5) is connected to the air source heat pump (4), the circulation pump and the temperature measuring equipment respectively.

2. The air source heat pump heating system according to claim 1, characterized in that: Also includes: The electric auxiliary heating device (6) is arranged on the heat-using circuit (2) and is located between the outlet of the heat exchange part and the heat supply terminal (3); the electric auxiliary heating device (6) is connected to the power supply module.

3. The air source heat pump heating system according to claim 2, characterized in that: The power supply module comprises: The solar power generation device (7) and the wind power generation device (8) are respectively connected to the air source heat pump (4), the circulation pump, the temperature measuring device and the electric auxiliary heating device (6), and are suitable for supplying power to the air source heat pump (4), the circulation pump, the temperature measuring device and the electric auxiliary heating device (6).

4. The air source heat pump heating system according to claim 3, characterized in that: The power generation capacity of the solar power generation device (7) is not less than the daytime power consumption of the heating circuit (1) and the heat utilization circuit (2), and the power generation capacity of the wind power generation device (8) is not less than the nighttime power consumption of the heating circuit (1) and the heat utilization circuit (2).

5. The air source heat pump heating system according to claim 3, characterized in that: The power supply module also includes: The energy storage device (9) is connected to the solar power generation device (7) and the wind power generation device (8) and is suitable for storing surplus electric energy of the solar power generation device (7) and the wind power generation device (8), and is connected to the air source heat pump (4) and is suitable for supplying power to the air source heat pump (4).

6. The air source heat pump heating system according to claim 5, characterized in that: The capacity of the energy storage device (9) is not less than the sum of the daytime surplus power demand and nighttime power demand of the heat supply circuit (1) and the heat consumption circuit (2).

7. The air source heat pump heating system according to claim 2, characterized in that: The temperature measuring device comprises: A first temperature measuring device (10), arranged inside the heat exchange portion and suitable for detecting the internal temperature of the heat exchange portion; A second temperature measuring device (11) is arranged between the outlet of the heat exchange part and the electric auxiliary heating device (6), and is suitable for detecting the temperature between the heat exchange part and the electric auxiliary heating device (6) in the heat circuit (2); A third temperature measuring device (12) is arranged between the heating terminal (3) and the heat exchange part, and is suitable for detecting the temperature between the heating terminal (3) and the heat exchange part in the heat circuit (2); The fourth temperature measuring device (13) is arranged in the heating terminal (3) and is suitable for detecting the internal temperature of the heating terminal (3).

8. The air source heat pump heating system according to claim 1, characterized in that: The heat exchange part is a buffer water tank (14), and the buffer water tank (14) is connected to a water replenishment end suitable for replenishing water to the buffer water tank (14).

9. The air source heat pump heating system according to claim 2, characterized in that: The industrial control system (5) completes the real-time prediction of the heat load of the heating terminal (3) based on the historical data of the heat load of the heating terminal (3), the weather forecast data of the meteorological station and the real-time monitoring data, and formulates the energy supply plan of the air source heat pump (4) coupled with the electric auxiliary heating device (6) with the goal of minimizing energy consumption.

10. An operating method of an air source heat pump heating system, applicable to the air source heat pump heating system according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the temperature detected by the first temperature measuring device (10) is lower than the first temperature, the air source heat pump (4) and the circulation pump on the heating circuit (1) are turned on; When the temperature detected by the first temperature measuring device (10) is greater than the second temperature, the air source heat pump (4) and the circulation pump on the heating circuit (1) are turned off, and the second temperature is greater than the first temperature; When the temperature detected by the second temperature measuring device (11) is lower than the third temperature, the electric auxiliary heating device (6) is turned on, and the third temperature is lower than the first temperature; When the temperature detected by the second temperature measuring device (11) is greater than the first temperature, the electric auxiliary heating device (6) is turned off; When the detected temperature of the third temperature measuring device (12) is lower than the fourth temperature, the circulation pump on the heat circuit (2) is turned on, and the fourth temperature is lower than the third temperature; When the temperature detected by the third temperature measuring device (12) is greater than the first temperature, the circulation pump on the heat circuit (2) is turned off; When the detected temperature of the fourth temperature measuring device (13) is lower than the fifth temperature, the circulation pump on the heat circuit (2) is turned on, and the fifth temperature is lower than the fourth temperature; When the detected temperature of the fourth temperature measuring device (13) is greater than the sixth temperature, the circulation pump on the heat circuit (2) is turned off, and the sixth temperature is less than the fourth temperature and greater than the fifth temperature.

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