Ground source heat pump system, control method and device thereof and storage medium

Abstract

The invention discloses a control method and device of a ground source heat pump system, the ground source heat pump system, a storage medium and a computer program product, the ground source heat pump system comprises a water tank, a floor heating device, an indoor heat exchanger and a ground source heat pump unit, and the method comprises the steps that the energy supply priority of the ground source heat pump unit is determined according to the outdoor environment temperature, the ground source heat pump unit is controlled to supply energy to the water tank, the indoor heat exchanger and the floor heating device according to the energy supply priority; in the process, the heat supply distribution proportion of the ground source heat pump unit is determined according to the temperature of the water tank, and the ground source heat pump unit is controlled to supply heat to the water tank and the floor heating device according to the heat supply distribution proportion. According to the scheme, by dynamically adjusting the energy supply priority and the heat supply distribution proportion of the ground source heat pump unit, the problems of fixed control priority and control lag are solved, and the system energy efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy utilization, and specifically relates to a control method and device for a ground source heat pump system, a ground source heat pump system, a storage medium, and a computer program product. Background Art

[0002] With the continuous increase in energy demand and the continuous improvement of environmental protection requirements, ground source heat pump systems that combine cooling, heating and water supply have gradually begun to be used in the process of building energy control. However, the control priority of this system is fixed (such as heating in winter and cooling in summer), and there is a certain lag in the control, resulting in low energy efficiency of the system and poor user experience.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The object of the present invention is to provide a control method, device, ground source heat pump system, storage medium and computer program product for a ground source heat pump system, so as to solve the problems in related schemes that the control priority of the ground source heat pump system is fixed and there is a certain lag in the control, resulting in low energy efficiency of the system and poor user experience. By dynamically adjusting the energy supply priority and heat distribution ratio of the ground source heat pump unit, the problems of fixed control priority and control lag are solved, the system energy efficiency is improved, and the user experience is improved.

[0005] The present invention provides a control method for a ground-source heat pump system, which includes a water tank, a floor heating device, an indoor heat exchanger, and a ground-source heat pump unit; the ground-source heat pump unit is used to absorb underground heat, provide thermal energy for the water tank and the floor heating device, and provide heat for the indoor heat exchanger; the ground-source heat pump unit is also used to discharge heat into the ground, providing cooling for the indoor heat exchanger; the method includes: during the operation of the ground-source heat pump system, obtaining the outdoor ambient temperature and the temperature of the water tank; determining the energy supply priority of the ground-source heat pump unit according to the outdoor ambient temperature, and controlling the ground-source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority; in the process of controlling the ground-source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, determining the heat supply distribution ratio of the ground-source heat pump unit according to the temperature of the water tank, and controlling the ground-source heat pump unit to supply heat to the water tank and the floor heating device respectively according to the heat supply distribution ratio.

[0006] In some embodiments, the energy supply priority of the ground source heat pump unit is determined according to the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than a preset first outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset first energy supply priority; the preset first energy supply priority is: providing heat for the floor heating device > providing heat for the water tank > providing heat for the indoor heat exchanger; if the outdoor ambient temperature is greater than a preset second outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heat for the water tank; if the outdoor ambient temperature is greater than or equal to the preset first outdoor temperature and less than or equal to the preset second outdoor temperature, the energy supply priority of the ground source heat pump unit is set by the user.

[0007] In some embodiments, the geothermal heat pump unit is connected to the indoor heat exchanger through a pipeline, and refrigerant flows in the pipeline; the method further includes: in the process of controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user, obtaining the refrigerant pressure in the pipeline; judging the magnitude of the refrigerant pressure; if the refrigerant pressure is less than or equal to the preset threshold, controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; if the refrigerant pressure is greater than the preset threshold, controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the preset default energy supply priority.

[0008] In some embodiments, the heat supply distribution ratio of the ground source heat pump unit is determined according to the temperature of the water tank, including: judging the temperature of the water tank; if the temperature of the water tank is greater than or equal to the preset water temperature, determining the heat supply distribution ratio of the ground source heat pump unit according to a preset dynamic weight formula; if the temperature of the water tank is less than the preset water temperature, determining the heat supply distribution ratio of the ground source heat pump unit according to the outdoor ambient temperature.

[0009] In some embodiments, the heat supply distribution ratio of the ground source heat pump unit is determined according to the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than a preset first outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset first heat supply distribution ratio; if the outdoor ambient temperature is greater than a preset second outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset second heat supply distribution ratio; wherein, the proportion of the water tank heating in the preset first heat supply distribution ratio is not less than 50%, and the proportion of the water tank heating in the preset second heat supply distribution ratio is 20% to 30%.

[0010] Matching the above method, the present invention provides a control device for a ground source heat pump system on the other hand, wherein the ground source heat pump system includes a water tank, a floor heating device, an indoor heat exchanger, and a ground source heat pump unit; the ground source heat pump unit is used to absorb underground heat, provide heat energy for the water tank and the floor heating device, and provide heat for the indoor heat exchanger; the ground source heat pump unit is also used to discharge heat into the ground, providing cooling for the indoor heat exchanger; the control device includes: an acquisition unit, configured to obtain the outdoor ambient temperature and the temperature of the water tank during the operation of the ground source heat pump system; a control unit, It is configured to determine the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature, and control the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority; the control unit is also configured to determine the heat supply distribution ratio of the ground source heat pump unit according to the temperature of the water tank in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, and control the ground source heat pump unit to supply heat to the water tank and the floor heating device respectively according to the heat supply distribution ratio.

[0011] In some embodiments, the control unit determines the energy supply priority of the geothermal heat pump unit based on the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than the preset first outdoor temperature, determining that the energy supply priority of the geothermal heat pump unit is the preset first energy supply priority; the preset first energy supply priority is: providing heat for the floor heating device > providing heat for the water tank > providing heat for the indoor heat exchanger; if the outdoor ambient temperature is greater than the preset second outdoor temperature, determining that the energy supply priority of the geothermal heat pump unit is the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heat for the water tank; if the outdoor ambient temperature is greater than or equal to the preset first outdoor temperature and less than or equal to the preset second outdoor temperature, the energy supply priority of the geothermal heat pump unit is set by the user.

[0012] In some embodiments, the geothermal heat pump unit is connected to the indoor heat exchanger through a pipeline, and refrigerant flows in the pipeline; the control unit is further configured to obtain the refrigerant pressure in the pipeline while controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; judge the magnitude of the refrigerant pressure; if the refrigerant pressure is less than or equal to a preset threshold, control the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; if the refrigerant pressure is greater than the preset threshold, control the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the preset default energy supply priority.

[0013] In some embodiments, the control unit determines the heat supply distribution ratio of the ground source heat pump unit based on the temperature of the water tank, including: judging the temperature of the water tank; if the temperature of the water tank is greater than or equal to the preset water temperature, determining the heat supply distribution ratio of the ground source heat pump unit according to a preset dynamic weight formula; if the temperature of the water tank is lower than the preset water temperature, determining the heat supply distribution ratio of the ground source heat pump unit according to the outdoor ambient temperature.

[0014] In some embodiments, the control unit determines the heat supply distribution ratio of the ground source heat pump unit based on the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than the preset first outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset first heat supply distribution ratio; if the outdoor ambient temperature is greater than the preset second outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset second heat supply distribution ratio; wherein, the proportion of the water tank heating in the preset first heat supply distribution ratio is not less than 50%, and the proportion of the water tank heating in the preset second heat supply distribution ratio is 20% to 30%.

[0015] In accordance with the above-mentioned device, the present invention further provides a ground source heat pump system, comprising: the control device of the ground source heat pump system described above.

[0016] In accordance with the above method, the present invention further provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned control method for the ground source heat pump system.

[0017] In accordance with the above method, the present invention further provides a computer program product, which includes a computer program. When the computer program product is processed and executed, it implements the steps of the above method for controlling the ground source heat pump system.

[0018] The solution of this invention determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. It then controls the ground-source heat pump unit to supply energy to the water tank, indoor heat exchanger, and floor heating system according to this energy supply priority. During this process, the ground-source heat pump unit's heat supply allocation ratio is determined based on the water tank temperature. This allocation ratio is then used to control the ground-source heat pump unit to supply heat to the water tank and floor heating system. By dynamically adjusting the ground-source heat pump unit's energy supply priority and heat supply allocation ratio, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0019] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic flow chart of an embodiment of a method for controlling a ground source heat pump system according to the present invention;

[0022] Figure 2 A schematic structural diagram of an embodiment of a control device for a ground source heat pump system according to the present invention;

[0023] Figure 3 is a structural diagram of the ground source heat pump system of the present invention;

[0024] Figure 4 This is a flow chart of another embodiment of a control method for a ground source heat pump system.

[0025] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0026] 1-water tank; 2-ground source heat pump unit; 3-indoor heat exchanger; 4-floor heating device; 5-underground pipe; 102-acquisition unit; 104-control unit. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The current ground-source heat pump system has the following problems: the limitations of fixed priority strategies, strong dependence on geological conditions, and delayed response of control algorithms.

[0029] First, most existing systems use a pre-set priority control method, such as prioritizing heating in winter and cooling in summer. However, this method is fixed and cannot dynamically allocate equipment according to user needs. For example, when there is a demand for heating and hot water in winter, all the heat from the condenser is used for heating, which results in insufficient hot water supply or poor heating effect. Another example is that in the summer, if the air conditioner is in cooling mode and the user suddenly needs hot water, they can only manually switch modes, which interferes with the user's cooling and significantly reduces the system's energy efficiency. Another example is that in a system with multiple operating modes such as air conditioning, floor heating, and hot water, when all indoor units, such as air conditioners, floor heating, and hot water, are operating simultaneously, there is serious interference between the indoor units, resulting in uneven refrigerant distribution and substandard temperatures in some rooms, resulting in a poor user experience.

[0030] Second, the efficiency of geothermal systems is highly dependent on the thermal conductivity of the soil, and existing technologies lack adaptive designs for different geological conditions. For example, placing U-shaped buried pipes in rock or dry soil significantly reduces heat transfer efficiency. The lack of a modular solution leads to high installation costs and limited applicability. Furthermore, the performance of geothermal systems is related to the thermal conductivity of the soil itself. U-shaped buried pipes have poor heat transfer efficiency when used in rock or dry soil, and without a compatible buried pipe structure, it is difficult to meet the diverse requirements of geothermal utilization in various geological conditions.

[0031] Third, traditional PID control uses empirical methods. When users have sudden hot water demands or sudden bad weather, it is difficult to respond and make timely adjustments to ensure the stability of the hot water temperature. It also requires manual calibration of the coefficients in the superheat adjustment formula. If immediate changes cannot be made during use, it is likely to cause temperature fluctuations and a certain lag, which will make the system less stable.

[0032] Therefore, the present invention provides a ground-source heat pump system and control method. This system, on the one hand, utilizes a multi-objective priority strategy to adjust the refrigerant flow and heat ratio, dynamically adjusting the refrigerant flow and heat ratio online and improving the system's energy efficiency. It also enables cross-seasonal energy storage, storing air conditioning waste heat underground in the summer and extracting it in the winter to utilize the ground heat, increasing geothermal utilization and reducing energy waste. Furthermore, when user needs are precisely matched, the system prioritizes heating in winter mode, while allocating excess heat to domestic hot water based on demand. In summer mode, cooling is prioritized, with any excess heat stored in the ground heat. In case of sudden hot water demand, 20% to 30% of the refrigerant can be allocated for hot water use. In emergency mode, the system switches to hot water heating when the water tank temperature falls below the set temperature, ensuring basic user needs. Furthermore, modular underground pipes (both vertical and horizontal, suitable for various geological conditions) can be used, reducing foundation installation costs. The system automatically adjusts the water pump flow rate based on ground temperature fluctuations to prevent geothermal saturation or reduced heat exchange efficiency, improving the stability and reliability of the entire system.

[0033] According to an embodiment of the present invention, a control method for a ground-source heat pump system is provided, wherein the ground-source heat pump system includes a water tank, a floor heating device, an indoor heat exchanger, and a ground-source heat pump unit; the ground-source heat pump unit is used to absorb underground heat, provide thermal energy for the water tank and the floor heating device, and provide heat for the indoor heat exchanger; the ground-source heat pump unit is also used to discharge heat into the ground, providing cooling for the indoor heat exchanger.

[0034] The specific structure of the ground source heat pump system is as follows: Figure 3 As shown, the system includes a water tank 1, a ground-source heat pump unit 2, an indoor heat exchanger 3, a floor heating system 4, and underground pipes 5. The water tank 1 stores domestic hot water and receives heat from the ground-source heat pump unit 2 to heat the water. The ground-source heat pump unit 2 provides heat to the water tank 1 and floor heating system 4, and to the indoor heat exchanger 3. In summer, the indoor heat exchanger 3 acts as an evaporator, absorbing heat from the refrigerant to achieve indoor cooling. In winter, it acts as a condenser, dissipating heat from the refrigerant to achieve indoor heating. The floor heating system 4 circulates hot water through pipes under the floor, evenly dissipating heat through the ground, achieving indoor heating. The underground pipes 5, which exchange heat with the soil, are modular in design and can be arranged vertically or horizontally. Using flange-type quick-release connectors, the underground pipes can be arranged either perpendicular or parallel to the ground surface, making them suitable for both vertical modules in rocky areas and horizontal modules in soft soils. Diverters and manifolds are used between the underground pipes to adjust the water flow distribution between modules under different geological conditions.

[0035] The geothermal heat pump unit 2 is directly connected to the underground pipe 5 via piping, forming a closed heat exchange loop. A heat transfer medium (such as water or antifreeze) flows through the loop. In winter, the geothermal heat pump unit 2 absorbs underground heat from the underground pipe 5 and discharges the heat back into the pipe 5 in summer. The geothermal heat pump unit 2 is bidirectionally connected to the indoor heat exchanger 3 via a refrigerant pipeline. A four-way valve controls the flow of refrigerant, directing high-temperature refrigerant to the indoor heat exchanger 3 in winter to provide heat, and low-temperature refrigerant to the indoor heat exchanger 3 in summer to provide cooling. The geothermal heat pump unit 2 is connected to the floor heating system 4 via a hot water pipeline. The geothermal heat pump unit 2 delivers heated hot water to the underfloor pipes of the floor heating system 4 to provide indoor heating. The geothermal heat pump unit 2 is also connected to the water tank 1 via a hot water pipeline. The geothermal heat pump unit 2 delivers heat to the water tank 1 to produce domestic hot water.

[0036] During winter operation, the system's buried pipes 5 transfer underground heat to the geothermal heat pump unit 2. The geothermal heat pump unit 2 then transfers the heat to the water tank 1, floor heating device 4, and indoor heat exchanger 3, providing heating and hot water. The system also adjusts the heating priority and ratio based on environmental data and operating parameters. The system prioritizes high-priority heat demands and distributes heat according to the heating ratio. During summer operation, the indoor heat exchanger 3 absorbs heat from the room and transfers it to the geothermal heat pump unit 2, which then transfers this heat to the water tank 1 to produce hot water. If the heat exceeds the required amount for hot water production, the excess heat is transferred underground through the buried pipes 5. During transitional season operation, the system selects the appropriate energy supply method based on user settings. Users can set energy supply priorities, for example, setting hot water production to the highest priority. Transitional seasons occur during periods of time, such as late spring and early autumn, when seasonal characteristics are less pronounced and user needs are unclear. Traditional fixed-priority systems can easily lead to energy waste or a poor user experience.

[0037] like Figure 1 FIG2 is a flow chart of an embodiment of the method of the present invention. The control method of the ground source heat pump system may include steps S110 to S130.

[0038] In step S110 , during the operation of the ground source heat pump system, the outdoor ambient temperature and the temperature of the water tank are obtained.

[0039] The system prioritizes energy supply in different seasons. The outdoor ambient temperature is used to determine the current season. The water tank temperature is the temperature of the water inside the tank and is used to monitor domestic hot water demand. Heat distribution adjustments are triggered when the water temperature falls below a set value.

[0040] In step S120, the energy supply priority of the ground source heat pump unit is determined according to the outdoor ambient temperature, and the ground source heat pump unit is controlled to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority.

[0041] The system prioritizes heating in winter to prevent excessive heat from being diverted to hot water, which could result in substandard room temperatures. In summer, it prioritizes cooling, while also storing waste heat underground to maximize geothermal utilization. Energy supply priority refers to the order in which the ground-source heat pump unit supplies energy to the water tank, indoor heat exchanger, and floor heating system. Energy supply includes both heating and cooling.

[0042] In some embodiments, in step S120, the specific process of determining the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature includes: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is lower than the preset first outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset first energy supply priority; the preset first energy supply priority is: providing heat for the floor heating device > providing heat for the water tank > providing heat for the indoor heat exchanger; if the outdoor ambient temperature is higher than the preset second outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heat for the water tank; if the outdoor ambient temperature is greater than or equal to the preset first outdoor temperature and less than or equal to the preset second outdoor temperature, the energy supply priority of the ground source heat pump unit is set by the user.

[0043] The outdoor ambient temperature is a key parameter that reflects the user's core needs. The first preset outdoor temperature can be set to 15°C, and the second preset outdoor temperature can be set to 25°C. When the outdoor ambient temperature is less than 15°C, the system determines that it is winter and the user's heating demand is urgent. Therefore, floor heating is prioritized, and the indoor heat exchanger only serves as a supplementary heating method. The energy supply priority is: floor heating > water tank heating > indoor heat exchanger heating.

[0044] When the outdoor ambient temperature is greater than 25°C, the system determines that it is summer, cooling demand takes priority, and there is no need for floor heating. Therefore, the energy supply priority is: indoor heat exchanger cooling > water tank heating; at this time, if there is no need to produce hot water, the energy supply priority is: indoor heat exchanger cooling > geothermal energy storage > water tank heating. Geothermal energy storage refers to the discharge of excess indoor heat into the underground soil through buried pipes for storage, so as to realize cross-seasonal heat utilization.

[0045] When the outdoor ambient temperature is 15℃≤≤25℃, the system determines that it is currently a transitional season and the user's needs are unclear, so it allows manual override of the default priority to improve the system's adaptability. The user can select "hot water priority mode" through the control panel to force the hot water weight to the highest. In some embodiments, if the user selects the heating mode, the preset first energy supply priority will be used as the default energy supply priority, and control will be performed according to this priority; if the user selects the cooling mode, the preset second energy supply priority will be used as the default energy supply priority, and control will be performed according to this priority. At this time, the user can still set the priority order.

[0046] Through temperature-driven priority switching, the system achieves a balanced supply of floor heating and hot water in winter and ensures cooling is not disrupted by hot water demand in summer, reducing energy waste and preventing substandard indoor temperatures. A manual transition mode, combined with a modular underground pipe design, makes the system adaptable to different climate zones and allows users to intervene based on real-time needs, overcoming the control limitations of traditional systems.

[0047] In some embodiments, the geothermal heat pump unit is connected to the indoor heat exchanger through a pipeline, and refrigerant flows in the pipeline; the method further includes: in the process of controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user, obtaining the refrigerant pressure in the pipeline; judging the magnitude of the refrigerant pressure; if the refrigerant pressure is less than or equal to the preset threshold, controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; if the refrigerant pressure is greater than the preset threshold, controlling the geothermal heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the preset default energy supply priority.

[0048] Refrigerant pressure is a key parameter for the safe operation of the system. Excessive refrigerant pressure may cause compressor overload, pipeline leakage and other faults in the system. The system implements the past refrigerant pressure value through the pressure sensor installed in the refrigerant pipeline, and compares it with the preset threshold value. The preset threshold value is determined by the equipment material and design parameters. Specifically, if the refrigerant pressure is ≤ the preset threshold value, the refrigerant pressure is within the safe range, and the system runs at the user-defined priority level to meet personalized needs; if the refrigerant pressure is greater than the preset threshold value, the default priority switch is triggered, and the system is forced to switch to the default priority to ensure safety. The default priority can be determined according to the current season. If it is winter, the default priority is the first energy supply priority; if it is summer, the default priority is the second energy supply priority; if it is a transition season, it is determined according to the heating mode or cooling mode set by the user. The default priority in heating mode is the first energy supply priority, and the default priority in cooling mode is the second energy supply priority.

[0049] Therefore, when the system operates according to the user-defined energy supply priority, it prevents pressure exceeding the limit due to user misoperation or unreasonable priority setting, thereby reducing the risk of equipment operation; when the pressure exceeds the limit, switching to the default priority can avoid a sudden drop in energy efficiency caused by overload operation of the system, ensuring that the system always operates in the high-efficiency range.

[0050] At step S130, in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, the heat supply distribution ratio of the ground source heat pump unit is determined according to the temperature of the water tank, and the ground source heat pump unit is controlled to supply heat to the water tank and the floor heating device respectively according to the heat supply distribution ratio.

[0051] The heat distribution ratio refers to the ratio of heat allocated by the ground-source heat pump unit to the water tank and floor heating system in heating mode. By dynamically determining the energy supply priority of the ground-source heat pump unit and adjusting the heat distribution ratio in real time, this breaks the limitations of traditional systems with fixed control priorities, allowing for flexible heat distribution based on seasons and user needs. Furthermore, by real-time monitoring and responding to changes in water tank temperature, it solves the energy inefficiency caused by control lag, achieves on-demand heat distribution, improves system energy efficiency, avoids interference with indoor units and insufficient hot water supply, and significantly improves the user experience.

[0052] In some embodiments, in step S130, the specific process of determining the heat supply distribution ratio of the ground source heat pump unit according to the temperature of the water tank includes: steps S210 to S230.

[0053] Step S210: determining the temperature of the water tank.

[0054] Step S220: If the temperature of the water tank is greater than or equal to the preset water temperature, the heat supply distribution ratio of the ground source heat pump unit is determined according to a preset dynamic weight formula.

[0055] The water tank temperature reflects the user's domestic hot water demand. When the water tank temperature is ≥ the preset water temperature, the water temperature is considered to be up to standard. The system can optimize the distribution based on the dynamic weight formula to balance energy efficiency and demand. The preset water temperature can be set to the user-set target water temperature -5°C. The dynamic weight formula is:

[0056] W heat =α·(T set -T env )+β·(T water_set -T water );

[0057] Among them, W heatis the heat distribution weight, which determines the total heat distribution ratio of heating and hot water supply. Heating includes floor heating and air conditioning heating. α is the ambient temperature difference weight coefficient, which reflects the intensity of heating demand. The value range is 0.4-0.8. The initial value of α is set to 0.7 in winter and 0.55 in transition season. set The indoor target temperature set by the user; T env is the outdoor ambient temperature; β is the water temperature deviation weight coefficient, which reflects the urgency of hot water demand and ranges from 0.2 to 0.6. The initial value of β is set to 0.3 in winter and 0.45 in transition season; T water_set Set the target hot water temperature for the user; T water is the water temperature in the water tank. α and β can also be adjusted according to user demand for heating or hot water.

[0058] The dynamic weight formula comprehensively considers the ambient temperature difference and the hot water demand deviation, where the weight coefficients α and β are optimized every 15 minutes based on historical energy consumption data, with the goal of minimizing the cumulative deviation between actual energy consumption and the theoretical optimal value. heat , and adjusts the heat distribution ratio based on the weight. For example, the lower the ambient temperature in winter, the greater the α weight, and the heat is more inclined to heating; the closer the water tank temperature is to the set value, the smaller the β weight, and the hot water heat distribution is reduced.

[0059] Step S230: If the temperature of the water tank is lower than the preset water temperature, the heat supply distribution ratio of the ground source heat pump unit is determined according to the outdoor ambient temperature.

[0060] In some embodiments, in step S230, the specific process of determining the heat supply distribution ratio of the ground source heat pump unit according to the outdoor ambient temperature includes: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than the preset first outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset first heat supply distribution ratio; if the outdoor ambient temperature is greater than the preset second outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset second heat supply distribution ratio; wherein, the proportion of the water tank heating in the preset first heat supply distribution ratio is not less than 50%, and the proportion of the water tank heating in the preset second heat supply distribution ratio is 20% to 30%.

[0061] When the outdoor temperature is lower than the preset first outdoor temperature, it's winter. Winter brings increased demand for both heating and hot water. Traditional systems often face insufficient hot water supply due to fixed priorities. Therefore, the system dynamically adjusts the hot water share to at least 50% to ensure a balance between the two. When the outdoor temperature is higher than the preset second outdoor temperature, it's summer. In summer, cooling is the core demand, while hot water demand is more of an emergency scenario. Therefore, the hot water allocation ratio is reduced to 20%-30% to avoid excessive refrigerant flow that could impact cooling efficiency.

[0062] In some embodiments, the ground source heat pump unit uses refrigerant to supply energy to the water tank, floor heating device, and indoor heat exchanger respectively, and adjusts the energy supply ratio by adjusting the distribution ratio of the refrigerant flow. The system adjusts the opening of the electronic expansion valve according to the difference between the target weight and the real-time status, switches the direction of the four-way valve according to the seasonal mode, and dynamically adjusts the speed of the fan and water pump with the square root value of the set temperature difference to improve the heat exchange efficiency. The priority order in summer is: air conditioning and cooling (to ensure basic comfort) > domestic hot water (response to sudden demand) > geothermal energy storage (utilization of redundant heat). The refrigerant flow used for air conditioning and cooling accounts for 70% to 100%; the refrigerant flow used for domestic hot water accounts for 20% to 30%, which is triggered by sudden demand and does not rely on formula calculation; the refrigerant flow of geothermal energy storage is the remaining refrigerant flow after air conditioning and cooling, such as 100% when there is no hot water demand, and is reduced proportionally when there is demand.

[0063] The summer mode control strategy uses pre-defined rules instead of dynamic formulas. Air conditioning and cooling rigidly utilize 70% to 100% of the refrigerant flow. Domestic hot water accounts for 0% when there's no demand. When demand is present, a fixed 20% to 30% of the refrigerant's excess heat is intercepted. Geothermal energy storage utilizes the remaining refrigerant flow (0% to 30%) to passively discharge heat into the ground.

[0064] During the transitional season, if the user selects heating mode, a dynamic weighting formula is used to allocate heating and hot water. If the user selects cooling mode, the allocation follows the summer rules. For example, in winter, with an outdoor temperature of -5°C, the user turns on floor heating (set to 22°C) and hot water (50°C). The control flow is as follows: the ground-source heat pump unit absorbs heat from the underground pipe system, and the refrigerant pressure increases in the economizer. The compressor heats the refrigerant to 60°C, and the four-way valve switches to heating mode: 70% of the heat is sent to the floor heating pipes (water temperature 45°C); 30% of the heat is sent to the water tank for heating (refrigerant flows to the water tank through a branch solenoid valve). If the water tank temperature reaches 50°C, the hot water branch is closed, and all the heat is used for floor heating. The electronic expansion valve adjusts its opening based on the indoor temperature difference, and the fan speed varies according to demand. For another example, in summer, with an outdoor temperature of 35°C, the user turns on the air conditioner for cooling (set to 26°C), while the floor heating system stores heat. The control flow is as follows: the four-way valve reverses, the refrigerant absorbs heat in the indoor evaporator, and the air conditioner blows out cold air. Excess heat is discharged into the geothermal pipe system (underground temperature rises from 17°C to 20°C); if the user temporarily needs hot water: the controller divides 20% of the refrigerant flow to the water tank for heating, and the remaining 80% continues to be discharged into the ground; after the water tank temperature reaches the standard, full flow geothermal heat discharge is restored.

[0065] Figure 4 FIG. 1 is a flow chart of another embodiment of a control method for a ground source heat pump system. Figure 4 As shown, the method includes:

[0066] Step 1: After the system starts, first collect the ambient temperature T in real time env , geothermal temperature T geo , water tank temperature T water , refrigerant pressure P ref and refrigerant pressure / flow and other parameters, while monitoring whether the user customizes the priority of the mode.

[0067] Step 2, enter mode judgment, when T env When the temperature is less than 15℃, it is judged as winter mode and enters the heating priority branch. The priority order is: heating is the highest priority by default, and heat is allocated to floor heating, domestic hot water and standby air conditioning in turn. env When the temperature is higher than 25℃, it is judged as summer mode and enters the cooling priority branch. The priority order is: air conditioning cooling > geothermal energy storage > hot water. When 15℃≤T env When the temperature is ≤25°C, it is considered a transitional season. User-defined mode allows users to manually select "Hot Water Priority Mode," which prioritizes hot water usage. The system has safety constraints. If user settings cause refrigerant pressure to exceed the limit, the system will automatically switch to the default mode to ensure equipment operation and safety.

[0068] In step 3, when the system detects that the water tank temperature is more than 5°C below the set water temperature, a response mechanism is triggered: in winter mode, the heating and domestic hot water distribution is adjusted to a 50 / 50 ratio. In summer mode, geothermal energy storage is interrupted, and 60% of the heat is allocated to domestic hot water to meet users' daily needs. During normal operation, the system calculates the real-time distribution ratio using a dynamic weighting formula. The electronic expansion valve opening is adjusted based on the difference between the target weight and the real-time status. The direction of the four-way valve is switched according to the seasonal mode. The fan and water pump speeds are dynamically adjusted based on the square root of the set temperature difference.

[0069] The technical solution of this embodiment determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. The unit is then controlled to supply energy to the water tank, indoor heat exchanger, and floor heating system, respectively, according to this energy supply priority. During this process, the heat supply distribution ratio of the ground-source heat pump unit is determined based on the water tank temperature. This heat supply ratio is then controlled to supply heat to the water tank and floor heating system, respectively. By dynamically adjusting the energy supply priority and heat supply distribution ratio of the ground-source heat pump unit, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0070] According to an embodiment of the present invention, a control device for a ground-source heat pump system corresponding to the control method for a ground-source heat pump system is also provided. The ground-source heat pump system includes a water tank, a floor heating device, an indoor heat exchanger, and a ground-source heat pump unit. The ground-source heat pump unit is configured to absorb underground heat, provide thermal energy to the water tank and the floor heating device, and provide heat to the indoor heat exchanger. The ground-source heat pump unit is also configured to discharge heat into the ground, providing cooling to the indoor heat exchanger.

[0071] The specific structure of the ground source heat pump system is as follows: Figure 3 As shown, the system includes a water tank 1, a ground-source heat pump unit 2, an indoor heat exchanger 3, a floor heating system 4, and underground pipes 5. The water tank 1 stores domestic hot water and receives heat from the ground-source heat pump unit 2 to heat the water. The ground-source heat pump unit 2 provides heat to the water tank 1 and floor heating system 4, and to the indoor heat exchanger 3. In summer, the indoor heat exchanger 3 acts as an evaporator, absorbing heat from the refrigerant to achieve indoor cooling. In winter, it acts as a condenser, dissipating heat from the refrigerant to achieve indoor heating. The floor heating system 4 circulates hot water through pipes under the floor, evenly dissipating heat through the ground, achieving indoor heating. The underground pipes 5, which exchange heat with the soil, are modular in design and can be arranged vertically or horizontally. Using flange-type quick-release connectors, the underground pipes can be arranged either perpendicular or parallel to the ground surface, making them suitable for both vertical modules in rocky areas and horizontal modules in soft soils. Diverters and manifolds are used between the underground pipes to adjust the water flow distribution between modules under different geological conditions.

[0072] The geothermal heat pump unit 2 is directly connected to the underground pipe 5 via piping, forming a closed heat exchange loop. A heat transfer medium (such as water or antifreeze) flows through the loop. In winter, the geothermal heat pump unit 2 absorbs underground heat from the underground pipe 5 and discharges the heat back into the pipe 5 in summer. The geothermal heat pump unit 2 is bidirectionally connected to the indoor heat exchanger 3 via a refrigerant pipeline. A four-way valve controls the flow of refrigerant, directing high-temperature refrigerant to the indoor heat exchanger 3 in winter to provide heat, and low-temperature refrigerant to the indoor heat exchanger 3 in summer to provide cooling. The geothermal heat pump unit 2 is connected to the floor heating system 4 via a hot water pipeline. The geothermal heat pump unit 2 delivers heated hot water to the underfloor pipes of the floor heating system 4 to provide indoor heating. The geothermal heat pump unit 2 is also connected to the water tank 1 via a hot water pipeline. The geothermal heat pump unit 2 delivers heat to the water tank 1 to produce domestic hot water.

[0073] When the system is operating in winter, the buried pipe 5 transfers the underground heat to the ground source heat pump unit 2. The ground source heat pump unit 2 transfers the heat to the water tank 1, the floor heating device 4, and the indoor heat exchanger 3 respectively to provide heating and hot water. At the same time, the priority and proportion of heating are adjusted according to environmental data and operating parameters. The system gives priority to meeting the heat demand with high priority and distributes heat according to the heating proportion. When the system is operating in summer, the indoor heat exchanger 3 absorbs heat from the room and transfers the heat to the ground source heat pump unit 2. The ground source heat pump unit 2 can transfer the heat to the water tank 1 to produce hot water. If the heat exceeds the heat demand for hot water production, the excess heat is transferred to the ground through the buried pipe 5. When the system is operating in the transition season, the system selects the corresponding energy supply method according to the user's settings. The user can set the energy supply priority, for example, setting the priority of hot water production to the highest.

[0074] See also Figure 2 The control device of the ground source heat pump system may include: an acquisition unit 102 and a control unit 104 .

[0075] The acquisition unit 101 is configured to acquire the outdoor ambient temperature and the temperature of the water tank during the operation of the ground source heat pump system.

[0076] The system prioritizes energy supply in different seasons. The outdoor ambient temperature is used to determine the current season. The water tank temperature is the temperature of the water inside the tank and is used to monitor domestic hot water demand. Heat distribution adjustments are triggered when the water temperature falls below a set value.

[0077] The control unit 102 is configured to determine the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature, and control the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority.

[0078] The system prioritizes heating in winter to avoid excessive heat allocation to hot water, which would cause the room temperature to not meet the standard; it prioritizes cooling in summer, while storing waste heat underground to improve geothermal utilization.

[0079] In some embodiments, the control unit 102 determines the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than the preset first outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset first energy supply priority; the preset first energy supply priority is: providing heat for the floor heating device > providing heat for the water tank > providing heat for the indoor heat exchanger; if the outdoor ambient temperature is greater than the preset second outdoor temperature, determining that the energy supply priority of the ground source heat pump unit is the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heat for the water tank; if the outdoor ambient temperature is greater than or equal to the preset first outdoor temperature and less than or equal to the preset second outdoor temperature, the energy supply priority of the ground source heat pump unit is set by the user.

[0080] The outdoor ambient temperature is a key parameter that reflects the user's core needs. The first preset outdoor temperature can be set to 15°C, and the second preset outdoor temperature can be set to 25°C. When the outdoor ambient temperature is less than 15°C, the system determines that it is winter and the user's heating demand is urgent. Therefore, floor heating is prioritized, and the indoor heat exchanger only serves as a supplementary heating method. The energy supply priority is: floor heating > water tank heating > indoor heat exchanger heating.

[0081] When the outdoor ambient temperature is greater than 25°C, the system determines that it is summer, cooling demand takes priority, and there is no need for floor heating. Therefore, the energy supply priority is: indoor heat exchanger cooling > water tank heating; at this time, if there is no need to produce hot water, the energy supply priority is: indoor heat exchanger cooling > geothermal energy storage > water tank heating. Geothermal energy storage refers to the discharge of excess indoor heat into the underground soil through buried pipes for storage, so as to realize cross-seasonal heat utilization.

[0082] When the outdoor ambient temperature is 15℃≤≤25℃, the system determines that it is currently a transitional season and the user's needs are unclear, so it allows manual override of the default priority to improve the system's adaptability. The user can select "hot water priority mode" through the control panel to force the hot water weight to the highest. In some embodiments, if the user selects the heating mode, the preset first energy supply priority will be used as the default energy supply priority, and control will be performed according to this priority; if the user selects the cooling mode, the preset second energy supply priority will be used as the default energy supply priority, and control will be performed according to this priority. At this time, the user can still set the priority order.

[0083] Through temperature-driven priority switching, the system achieves a balanced supply of floor heating and hot water in winter and ensures cooling is not disrupted by hot water demand in summer, reducing energy waste and preventing substandard indoor temperatures. A manual transition mode, combined with a modular underground pipe design, makes the system adaptable to different climate zones and allows users to intervene based on real-time needs, overcoming the control limitations of traditional systems.

[0084] In some embodiments, the ground source heat pump unit is connected to the indoor heat exchanger through a pipeline, and refrigerant flows in the pipeline; the control unit 102 is also configured to: obtain the refrigerant pressure in the pipeline in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; judge the magnitude of the refrigerant pressure; if the refrigerant pressure is less than or equal to the preset threshold, control the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; if the refrigerant pressure is greater than the preset threshold, control the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the preset default energy supply priority.

[0085] Refrigerant pressure is a key parameter for the safe operation of the system. Excessive refrigerant pressure may cause compressor overload, pipeline leakage and other faults in the system. The system implements the past refrigerant pressure value through the pressure sensor installed in the refrigerant pipeline, and compares it with the preset threshold value. The preset threshold value is determined by the equipment material and design parameters. Specifically, if the refrigerant pressure is ≤ the preset threshold value, the refrigerant pressure is within the safe range, and the system runs at the user-defined priority level to meet personalized needs; if the refrigerant pressure is greater than the preset threshold value, the default priority switch is triggered, and the system is forced to switch to the default priority to ensure safety. The default priority can be determined according to the current season. If it is winter, the default priority is the first energy supply priority; if it is summer, the default priority is the second energy supply priority; if it is a transition season, it is determined according to the heating mode or cooling mode set by the user. The default priority in heating mode is the first energy supply priority, and the default priority in cooling mode is the second energy supply priority.

[0086] Therefore, when the system operates according to the user-defined energy supply priority, it prevents pressure exceeding the limit due to user misoperation or unreasonable priority setting, thereby reducing the risk of equipment operation; when the pressure exceeds the limit, switching to the default priority can avoid a sudden drop in energy efficiency caused by overload operation of the system, ensuring that the system always operates in the high-efficiency range.

[0087] The control unit 102 is further configured to determine the heat distribution ratio of the ground source heat pump unit according to the temperature of the water tank in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, and control the ground source heat pump unit to supply heat to the water tank and the floor heating device respectively according to the heat distribution ratio.

[0088] By dynamically determining the energy supply priority of the ground-source heat pump unit and adjusting the heat distribution ratio in real time, the limitations of the traditional system's fixed control priority are broken, and heat can be flexibly distributed according to the season and user needs. At the same time, through real-time monitoring and response to changes in water tank temperature, the problem of low energy efficiency caused by control lag is solved, heat is distributed on demand, the system energy efficiency ratio is improved, indoor unit interference, insufficient hot water supply, etc. are avoided, and the user experience is significantly improved.

[0089] In some embodiments, the control unit 102 determines the heat distribution ratio of the ground source heat pump unit according to the temperature of the water tank, including:

[0090] The control unit 104 is further configured to determine the temperature of the water tank.

[0091] The control unit 104 is further configured to determine the heat supply distribution ratio of the ground source heat pump unit according to a preset dynamic weight formula if the temperature of the water tank is greater than or equal to the preset water temperature.

[0092] The water tank temperature reflects the user's domestic hot water demand. When the water tank temperature is ≥ the preset water temperature, the water temperature is considered to be up to standard. The system can optimize the distribution based on the dynamic weight formula to balance energy efficiency and demand. The preset water temperature can be set to the user-set target water temperature -5°C. The dynamic weight formula is:

[0093] W heat =α·(T set -T env )+β·(T water_set -T water );

[0094] Among them, W heat is the heat distribution weight, which determines the total heat distribution ratio of heating and hot water supply. Heating includes floor heating and air conditioning heating. α is the ambient temperature difference weight coefficient, which reflects the intensity of heating demand. The value range is 0.4-0.8. The initial value of α is set to 0.7 in winter and 0.55 in transition season. set Set the target temperature for the user; T env is the outdoor ambient temperature; β is the water temperature deviation weight coefficient, which reflects the urgency of hot water demand and ranges from 0.2 to 0.6. The initial value of β is set to 0.3 in winter and 0.45 in transition season; Twater_set Set the target hot water temperature for the user; T water is the water temperature in the water tank. α and β can also be adjusted according to user demand for heating or hot water.

[0095] The dynamic weight formula comprehensively considers the ambient temperature difference and the hot water demand deviation, where the weight coefficients α and β are optimized every 15 minutes based on historical energy consumption data, with the goal of minimizing the cumulative deviation between actual energy consumption and the theoretical optimal value. heat , and adjusts the heat distribution ratio based on the weight. For example, the lower the ambient temperature in winter, the greater the α weight, and the heat is more inclined to heating; the closer the water tank temperature is to the set value, the smaller the β weight, and the hot water heat distribution is reduced.

[0096] The control unit 104 is further configured to determine the heat supply distribution ratio of the ground source heat pump unit according to the outdoor ambient temperature if the temperature of the water tank is lower than the preset water temperature.

[0097] In some embodiments, the control unit 104 determines the heat supply distribution ratio of the ground source heat pump unit based on the outdoor ambient temperature, including: judging the size of the outdoor ambient temperature; if the outdoor ambient temperature is less than the preset first outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset first heat supply distribution ratio; if the outdoor ambient temperature is greater than the preset second outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset second heat supply distribution ratio; wherein, the proportion of the water tank heating in the preset first heat supply distribution ratio is not less than 50%, and the proportion of the water tank heating in the preset second heat supply distribution ratio is 20% to 30%.

[0098] When the outdoor temperature is lower than the preset first outdoor temperature, it's winter. Winter brings increased demand for both heating and hot water. Traditional systems often face insufficient hot water supply due to fixed priorities. Therefore, the system dynamically adjusts the hot water share to at least 50% to ensure a balance between the two. When the outdoor temperature is higher than the preset second outdoor temperature, it's summer. In summer, cooling is the core demand, while hot water demand is more of an emergency scenario. Therefore, the hot water allocation ratio is reduced to 20%-30% to avoid excessive refrigerant flow that could impact cooling efficiency.

[0099] In some embodiments, the ground source heat pump unit uses refrigerant to supply energy to the water tank, floor heating device, and indoor heat exchanger respectively, and adjusts the energy supply ratio by adjusting the distribution ratio of the refrigerant flow. The system adjusts the opening of the electronic expansion valve according to the difference between the target weight and the real-time status, switches the direction of the four-way valve according to the seasonal mode, and dynamically adjusts the speed of the fan and water pump with the square root value of the set temperature difference to improve the heat exchange efficiency. The priority order in summer is: air conditioning and cooling (to ensure basic comfort) > domestic hot water (response to sudden demand) > geothermal energy storage (utilization of redundant heat). The refrigerant flow used for air conditioning and cooling accounts for 70% to 100%; the refrigerant flow used for domestic hot water accounts for 20% to 30%, which is triggered by sudden demand and does not rely on formula calculation; the refrigerant flow of geothermal energy storage is the remaining refrigerant flow after air conditioning and cooling, such as 100% when there is no hot water demand, and is reduced proportionally when there is demand.

[0100] The summer mode control strategy uses pre-defined rules instead of dynamic formulas. Air conditioning and cooling rigidly utilize 70% to 100% of the refrigerant flow. Domestic hot water accounts for 0% when there's no demand. When demand is present, a fixed 20% to 30% of the refrigerant's excess heat is intercepted. Geothermal energy storage utilizes the remaining refrigerant flow (0% to 30%) to passively discharge heat into the ground.

[0101] During the transitional season, if the user selects heating mode, a dynamic weighting formula is used to allocate heating and hot water. If the user selects cooling mode, the allocation follows the summer rules. For example, in winter, with an outdoor temperature of -5°C, the user turns on floor heating (set to 22°C) and hot water (50°C). The control flow is as follows: the ground-source heat pump unit absorbs heat from the underground pipe system, and the refrigerant pressure increases in the economizer. The compressor heats the refrigerant to 60°C, and the four-way valve switches to heating mode: 70% of the heat is sent to the floor heating pipes (water temperature 45°C); 30% of the heat is sent to the water tank for heating (refrigerant flows to the water tank through a branch solenoid valve). If the water tank temperature reaches 50°C, the hot water branch is closed, and all the heat is used for floor heating. The electronic expansion valve adjusts its opening based on the indoor temperature difference, and the fan speed varies according to demand. For another example, in summer, with an outdoor temperature of 35°C, the user turns on the air conditioner for cooling (set to 26°C), while the floor heating system stores heat. The control flow is as follows: the four-way valve reverses, the refrigerant absorbs heat in the indoor evaporator, and the air conditioner blows out cold air. Excess heat is discharged into the geothermal pipe system (underground temperature rises from 17°C to 20°C); if the user temporarily needs hot water: the controller divides 20% of the refrigerant flow to the water tank for heating, and the remaining 80% continues to be discharged into the ground; after the water tank temperature reaches the standard, full flow geothermal heat discharge is restored.

[0102] Figure 4 FIG. 1 is a flow chart of another embodiment of a control method for a ground source heat pump system. Figure 4 As shown, the method includes:

[0103] Step 1: After the system starts, first collect the ambient temperature T in real timeenv , geothermal temperature T geo , water tank temperature T water , refrigerant pressure P ref and refrigerant pressure / flow and other parameters, while monitoring whether the user customizes the priority of the mode.

[0104] Step 2, enter mode judgment, when T env When the temperature is less than 15℃, it is judged as winter mode and enters the heating priority branch. The priority order is: heating is the highest priority by default, and heat is allocated to floor heating, domestic hot water and standby air conditioning in turn. env When the temperature is higher than 25℃, it is judged as summer mode and enters the cooling priority branch. The priority order is: air conditioning cooling > geothermal energy storage > hot water. When 15℃≤T env When the temperature is ≤25°C, it is considered a transitional season. User-defined mode allows users to manually select "Hot Water Priority Mode," which prioritizes hot water usage. The system has safety constraints. If user settings cause refrigerant pressure to exceed the limit, the system will automatically switch to the default mode to ensure equipment operation and safety.

[0105] In step 3, when the system detects that the water tank temperature is more than 5°C below the set water temperature, a response mechanism is triggered: in winter mode, the heating and domestic hot water distribution is adjusted to a 50 / 50 ratio. In summer mode, geothermal energy storage is interrupted, and 60% of the heat is allocated to domestic hot water to meet users' daily needs. During normal operation, the system calculates the real-time distribution ratio using a dynamic weighting formula. The electronic expansion valve opening is adjusted based on the difference between the target weight and the real-time status. The direction of the four-way valve is switched according to the seasonal mode. The fan and water pump speeds are dynamically adjusted based on the square root of the set temperature difference.

[0106] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0107] The technical solution of this invention determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. The unit is then controlled to supply energy to the water tank, indoor heat exchanger, and floor heating system according to this energy supply priority. During this process, the heat supply distribution ratio of the ground-source heat pump unit is determined based on the water tank temperature. This heat supply ratio is then controlled to supply heat to the water tank and floor heating system respectively. By dynamically adjusting the energy supply priority and heat supply distribution ratio of the ground-source heat pump unit, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0108] According to an embodiment of the present invention, a ground source heat pump system corresponding to the control device of the ground source heat pump system is also provided. The ground source heat pump system may include: the control device of the ground source heat pump system described above.

[0109] Since the processing and functions implemented by the ground source heat pump system of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0110] The technical solution of this invention determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. The unit is then controlled to supply energy to the water tank, indoor heat exchanger, and floor heating system according to this energy supply priority. During this process, the heat supply distribution ratio of the ground-source heat pump unit is determined based on the water tank temperature. This heat supply ratio is then controlled to supply heat to the water tank and floor heating system respectively. By dynamically adjusting the energy supply priority and heat supply distribution ratio of the ground-source heat pump unit, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0111] According to an embodiment of the present invention, a storage medium corresponding to the control method of the ground source heat pump system is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the control method of the ground source heat pump system described above.

[0112] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0113] The technical solution of this invention determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. The unit is then controlled to supply energy to the water tank, indoor heat exchanger, and floor heating system according to this energy supply priority. During this process, the heat supply distribution ratio of the ground-source heat pump unit is determined based on the water tank temperature. This heat supply ratio is then controlled to supply heat to the water tank and floor heating system respectively. By dynamically adjusting the energy supply priority and heat supply distribution ratio of the ground-source heat pump unit, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0114] According to an embodiment of the present invention, a computer program product corresponding to the control method of the ground source heat pump system is also provided. The computer program product includes a computer program, and when the computer program product is processed and executed, the steps of the control method of the ground source heat pump system are implemented.

[0115] Since the processing and functions implemented by the computer program product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0116] The technical solution of this invention determines the energy supply priority of the ground-source heat pump unit based on the outdoor ambient temperature. The unit is then controlled to supply energy to the water tank, indoor heat exchanger, and floor heating system according to this energy supply priority. During this process, the heat supply distribution ratio of the ground-source heat pump unit is determined based on the water tank temperature. This heat supply ratio is then controlled to supply heat to the water tank and floor heating system respectively. By dynamically adjusting the energy supply priority and heat supply distribution ratio of the ground-source heat pump unit, the problems of fixed control priority and control lag are resolved, improving system energy efficiency and enhancing the user experience.

[0117] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0118] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A control method for a ground source heat pump system, characterized in that: The ground source heat pump system includes a water tank, a floor heating device, an indoor heat exchanger, and a ground source heat pump unit; the ground source heat pump unit is used to absorb underground heat, provide heat energy for the water tank and the floor heating device, and provide heat for the indoor heat exchanger; the ground source heat pump unit is also used to discharge heat into the ground, providing cooling for the indoor heat exchanger; The method comprises: During the operation of the ground source heat pump system, obtaining the outdoor ambient temperature and the temperature of the water tank; determining the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature, and controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority; In the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, the heat supply distribution ratio of the ground source heat pump unit is determined according to the temperature of the water tank, and the ground source heat pump unit is controlled to supply heat to the water tank and the floor heating device respectively according to the heat supply distribution ratio.

2. The control method of the ground source heat pump system according to claim 1, characterized in that: Determining the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature includes: Determining the outdoor ambient temperature; If the outdoor ambient temperature is lower than the preset first outdoor temperature, the energy supply priority of the ground source heat pump unit is determined to be the preset first energy supply priority; the preset first energy supply priority is: heat supply for the floor heating device > heat supply for the water tank > heat supply for the indoor heat exchanger; If the outdoor ambient temperature is greater than the preset second outdoor temperature, the energy supply priority of the ground source heat pump unit is determined to be the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heating for the water tank; If the outdoor ambient temperature is greater than or equal to a preset first outdoor temperature and less than or equal to a preset second outdoor temperature, the user sets the energy supply priority of the ground source heat pump unit.

3. The control method of the ground source heat pump system according to claim 2, characterized in that: The ground source heat pump unit is connected to the indoor heat exchanger via a pipeline, and a refrigerant flows in the pipeline; The method further comprises: obtaining the refrigerant pressure in the pipeline in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; Determining the magnitude of the refrigerant pressure; If the refrigerant pressure is less than or equal to a preset threshold, the ground source heat pump unit is controlled to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority set by the user; If the refrigerant pressure is greater than a preset threshold, the ground source heat pump unit is controlled according to a preset default energy supply priority to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively.

4. The control method of the ground source heat pump system according to any one of claims 1 to 3, characterized in that: Determining the heat supply distribution ratio of the ground source heat pump unit according to the temperature of the water tank includes: Determining the temperature of the water tank; If the temperature of the water tank is greater than or equal to the preset water temperature, the heat supply distribution ratio of the ground source heat pump unit is determined according to a preset dynamic weight formula; If the temperature of the water tank is lower than the preset water temperature, the heat supply distribution ratio of the ground source heat pump unit is determined according to the outdoor ambient temperature.

5. The control method of the ground source heat pump system according to claim 4, characterized in that: Determining the heat supply distribution ratio of the ground source heat pump unit according to the outdoor ambient temperature includes: Determining the outdoor ambient temperature; If the outdoor ambient temperature is lower than the preset first outdoor temperature, the heat supply distribution ratio of the ground source heat pump unit is determined to be the preset first heat supply distribution ratio; If the outdoor ambient temperature is greater than the preset second outdoor temperature, determining the heat supply distribution ratio of the ground source heat pump unit to be the preset second heat supply distribution ratio; Among them, the proportion of water tank heating in the preset first heat supply distribution ratio is not less than 50%, and the proportion of water tank heating in the preset second heat supply distribution ratio is 20% to 30%.

6. A control device for a ground source heat pump system, characterized in that: The ground source heat pump system includes a water tank, a floor heating device, an indoor heat exchanger, and a ground source heat pump unit; the ground source heat pump unit is used to absorb underground heat, provide heat energy for the water tank and the floor heating device, and provide heat for the indoor heat exchanger; the ground source heat pump unit is also used to discharge heat into the ground, providing cooling for the indoor heat exchanger; The control device comprises: An acquisition unit is configured to acquire the outdoor ambient temperature and the temperature of the water tank during the operation of the ground source heat pump system; a control unit configured to determine an energy supply priority of the ground-source heat pump unit according to the outdoor ambient temperature, and control the ground-source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority; The control unit is further configured to determine the heat supply distribution ratio of the ground source heat pump unit according to the temperature of the water tank in the process of controlling the ground source heat pump unit to supply energy to the water tank, the indoor heat exchanger, and the floor heating device respectively according to the energy supply priority, and control the ground source heat pump unit to supply heat to the water tank and the floor heating device respectively according to the heat supply distribution ratio.

7. The control device of the ground source heat pump system according to claim 6, characterized in that: The control unit determines the energy supply priority of the ground source heat pump unit according to the outdoor ambient temperature, including: Determining the outdoor ambient temperature; If the outdoor ambient temperature is lower than the preset first outdoor temperature, the energy supply priority of the ground source heat pump unit is determined to be the preset first energy supply priority; the preset first energy supply priority is: heat supply for the floor heating device > heat supply for the water tank > heat supply for the indoor heat exchanger; If the outdoor ambient temperature is greater than the preset second outdoor temperature, the energy supply priority of the ground source heat pump unit is determined to be the preset second energy supply priority; the preset second energy supply priority is: providing cooling for the indoor heat exchanger > providing heating for the water tank; If the outdoor ambient temperature is greater than or equal to a preset first outdoor temperature and less than or equal to a preset second outdoor temperature, the user sets the energy supply priority of the ground source heat pump unit.

8. A ground source heat pump system, characterized in that: include: A control device for a ground source heat pump system according to claim 6 or 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the control method of the ground source heat pump system according to any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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