Control method, device and equipment of heating system, medium and heating system

Abstract

The invention relates to the technical field of heating, and particularly discloses a control method, device and equipment of a heating system, a medium and the heating system.The method comprises the steps that when a heating assembly has the heating requirement, the current heating return water temperature, the target heating temperature and the current heat storage amount of a heat storage module are obtained; whether the temperature difference value between the current heating return water temperature and the target heating temperature exceeds the working temperature difference threshold value of an outdoor unit or not is judged, the current working mode of the heating system is determined based on the judgment result and the current heat storage amount, and a water pump, a first valve and a second valve are controlled based on the current working mode; the water pump and the valves are controlled based on the current working mode of the heating system, so that the valves are controlled to be opened and closed in different heating application scenes to switch a proper heating flow path, the starting and stopping times of the heating system under low load are effectively reduced, the operation stability of the heating system is ensured, and the heating efficiency is improved. And the service life of the heating system is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, and in particular to a control method, device, equipment, medium and heating system of a heating system. Background Art

[0002] Heating includes floor heating, heating, electric heating film, wall-mounted boiler, electric blanket and other methods. Among them, floor heating is closest to the ideal heating curve of the human body and is a more comfortable heating method. The heat is radiated from bottom to top, which conforms to the traditional health concept.

[0003] The current heating system controls the start and stop of the unit only by detecting the return water temperature of the heating system. When the heating system is in heating operation, when the user's heating demand is low, it will cause the heating system to start and stop frequently, which will cause the instantaneous power of the heating system to increase and affect the life of the heating system.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a control method, device, equipment, medium and heating system for a heating system, aiming to solve the technical problem that the prior art cannot effectively control the heating system, resulting in frequent start and stop of the heating system, thereby affecting the life of the heating system and user experience.

[0006] To achieve the above-mentioned purpose, the present invention provides a control method for a heating system, the control method for a heating system is applied to a heating system, the heating system comprises an outdoor unit, a heat storage component, a control component and a heating component, the control component comprises a heat exchanger, a water pump, a first valve and a second valve, the refrigerant inlet and outlet pipes of the outdoor unit are connected with the heat exchanger, the heat exchange flow path of the heat exchanger is connected with the first valve and the second valve respectively, the heat exchange flow path of the heat exchanger is connected with the water inlet flow path of the heating component through the first valve, the heat exchange flow path of the heat exchanger is connected with the water inlet flow path of the heat storage component through the second valve, the water pump is arranged between the heat exchanger and the water outlet flow path of the heating component, and the water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component;

[0007] The method comprises the following steps:

[0008] When the heating component has a heating demand, obtaining the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module;

[0009] Determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit;

[0010] Determining a current operating mode of the heating system based on the judgment result and the current heat storage;

[0011] The water pump, the first valve and the second valve are controlled respectively based on the current working mode.

[0012] Optionally, the current working mode includes a heating mode, a heat storage heating mode and a heat storage module heating mode;

[0013] The determining the current working mode of the heating system based on the judgment result and the current heat storage comprises:

[0014] When the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the external unit, determining that the current operating mode of the heating system is the heating mode;

[0015] When the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the operating temperature difference threshold of the outdoor unit, and the current heat storage amount does not exceed the preset heat storage threshold, determining that the current operating mode of the heating system is the heat storage heating mode;

[0016] When the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the preset temperature difference threshold of the external unit, and the current heat storage exceeds the preset heat storage threshold, it is determined that the current working mode of the heating system is the heat storage module heating mode.

[0017] Optionally, when the heating system is in the heating mode, the water pump, the first valve and the second valve are controlled respectively, including:

[0018] respectively controlling the water pump to start, the first valve to start, and the second valve to close, and controlling the external unit to heat, so as to supply heat to the heating module through the heat exchanger connected to the external unit;

[0019] Monitoring whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold;

[0020] If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, the external unit is controlled to shut down.

[0021] Optionally, when the heating system is in the heat storage heating mode, the controlling the water pump, the first valve and the second valve respectively includes:

[0022] respectively controlling the water pump to start, the first valve to start, and the second valve to open, and controlling the external unit to heat, so as to supply heat to the heating module and the heat storage module through the heat exchanger connected to the external unit;

[0023] Monitor whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold, and whether the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit;

[0024] If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, or the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit, the external unit is controlled to shut down.

[0025] Optionally, when the heating system is in the thermal storage module heating mode, the water pump, the first valve and the second valve are controlled respectively, including:

[0026] The water pump, the first valve and the second valve are controlled to be turned on respectively, and the external unit is turned off to supply heat to the heating component through the heat storage module.

[0027] Optionally, the control method of the heating system further includes:

[0028] When the outdoor machine has a defrosting demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, so as to control the outdoor machine to perform cooling, so as to provide heat to the outdoor machine through the heat storage module.

[0029] Optionally, the control method of the heating system further includes:

[0030] When the outdoor unit has a defrosting demand and the heating component has a heating demand, the water pump is controlled to be turned on, the first valve is closed, and the second valve is controlled to be opened, so as to control the outdoor unit to perform cooling, so as to provide heating to the outdoor unit through the heat storage module;

[0031] Monitoring the current outlet water temperature of the heat exchanger and the target heating temperature;

[0032] When the current outlet water temperature is greater than the target heating temperature, the first valve is controlled to open.

[0033] Optionally, the control method of the heating system further includes:

[0034] When the heat storage component has a heat storage demand and the heating component does not have a heating demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, and the external unit is controlled to heat, so as to heat the heat storage module through the heat exchanger connected to the external unit.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a heating system, which includes an outdoor unit, a heat storage component, a control component and a heating component. The control component includes a heat exchanger, a water pump, a first valve and a second valve. The refrigerant inlet and outlet pipes of the outdoor unit are connected to the heat exchanger. The heat exchange flow path of the heat exchanger is connected to the first valve and the second valve respectively. The heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heating component through the first valve. The heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heat storage component through the second valve. The water pump is arranged between the heat exchanger and the water outlet flow path of the heating component. The water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component.

[0036] In addition, to achieve the above-mentioned purpose, the present invention also provides a control device for a heating system, the control device for the heating system comprising:

[0037] A temperature acquisition module, used to acquire the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module when the heating component has a heating demand;

[0038] A temperature difference monitoring module is used to determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit;

[0039] A mode determination module, configured to determine a current working mode of the heating system based on a determination result and the current heat storage;

[0040] A heat exchange control module is used to control the water pump, the first valve and the second valve respectively based on the current working mode.

[0041] In addition, to achieve the above-mentioned purpose, the present invention also proposes a control device for a heating system, which includes: a memory, a processor, and a control program for the heating system stored in the memory and executable on the processor, and the control program for the heating system is configured to implement the steps of the control method for the heating system as described above.

[0042] In addition, to achieve the above objectives, the present invention also proposes a storage medium, on which a control program of a heating system is stored, and when the control program of the heating system is executed by a processor, the steps of the control method of the heating system as described above are implemented.

[0043] The present invention obtains the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module when the heating component has a heating demand, determines whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the external unit, determines the current operating mode of the heating system based on the judgment result and the current heat storage capacity, and controls the water pump, the first valve and the second valve respectively based on the current operating mode; since the present invention controls the water pump, the first valve and the second valve respectively based on the current operating mode of the heating system, it is possible to control the valve switch in different heating application scenarios to switch the appropriate heating flow path, thereby effectively reducing the number of starts and stops of the heating system under low load conditions, ensuring the operating stability of the heating system, and greatly improving the life of the heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of a control device of a heating system in a hardware operating environment involved in an embodiment of the present invention;

[0045] Figure 2 It is a flow chart of a first embodiment of a control method for a heating system of the present invention;

[0046] Figure 3 is a schematic structural diagram of a heating system in one embodiment of the present invention;

[0047] Figure 4 A schematic diagram of the structure of a control module in one embodiment of the present invention;

[0048] Figure 5 It is a flow chart of a second embodiment of a control method for a heating system of the present invention;

[0049] Figure 6 It is a structural block diagram of the first embodiment of the control device of the heating system of the present invention.

[0050] Description of Figure Numbers:

[0051] Label name Label name 1 External unit 2 Control Module 3 Domestic hot water terminal 4 Thermal storage module 5 Heating module 6 Water supply end 21 Plate Heat Exchanger 22 Exhaust valve 23 Electric heating components 24 System outlet water temperature probe 25 Water flow switch 26 First Valve 27 Second valve 28 System flow meter 29 Expansion tank 31 pressure gauge 32 Pressure relief valve 33 Water Pump 34 System return water temperature probe 35 Domestic hot water terminal flow meter 36 Domestic hot water temperature detection 37 Thermal storage module outlet water temperature detection 38 Thermal storage module inlet water temperature probe 39 Mixing valve

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0054] Reference Figure 1 , Figure 1 This is a schematic diagram of the control device structure of a heating system in the hardware operating environment involved in an embodiment of the present invention.

[0055] like Figure 1 As shown, the control device of the heating system may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the control device of the heating system, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0057] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a control program for the heating system.

[0058] exist Figure 1 In the control device of the heating system shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the control device of the heating system of the present invention can be set in the control device of the heating system, and the control device of the heating system calls the control program of the heating system stored in the memory 1005 through the processor 1001, and executes the control method of the heating system provided in the embodiment of the present invention.

[0059] The embodiment of the present invention provides a control method for a heating system, referring to Figure 2 , Figure 2 It is a flow chart of a first embodiment of a control method for a heating system according to the present invention.

[0060] In this embodiment, the control method of the heating system includes the following steps:

[0061] Step S10: When the heating component has a heating demand, the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module are obtained.

[0062] It should be understood that the executor of this embodiment is a controller, mainly a controller connected to the heating system, which can be a device that can control the opening, adjustment and switching of various components of the heating system, and can process and transmit data, or it can be other devices that can achieve this function, which is not limited in this embodiment.

[0063] It can be understood that the control method of the heating system of this embodiment is applied to the heating system, see Figure 3 , Figure 3 This is a schematic diagram of the heating system structure. The heating system includes an outdoor unit, a control module, a domestic hot water terminal, a heat storage module, a heating module, and a tap water terminal. The tap water terminal is used to supply water to the heating system, and the domestic hot water terminal is used to supply domestic hot water to users using the hot water discharged from the heating system. The outdoor unit is connected to the control module, and the control module is respectively connected to the outdoor unit, the heat storage module, the heating module, the domestic hot water terminal, and the tap water terminal.

[0064] It should be understood that referring to Figure 4 , Figure 4 The control module is a schematic diagram of the control module structure. A heat exchanger is provided in the control module. The refrigerant flow path of the external unit is connected to the control module through the heat exchanger, so as to achieve heat exchange of the control module through the external unit. The control module includes a plate heat exchanger, an exhaust valve, an electric heating component, a system outlet water temperature probe, a water flow switch, a heating electric two-way valve (i.e., the first valve), a heat storage electric two-way valve (i.e., the second valve), a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump, a system return water temperature probe, a domestic hot water terminal flow meter, a domestic hot water temperature probe, a thermal storage module outlet water temperature probe, and a thermal storage module inlet water temperature probe. A mixing valve is provided between the domestic hot water temperature probe and the thermal storage module inlet water temperature probe.

[0065] It should be noted that the heat exchanger is respectively connected to the water outlet branch and the water inlet branch in the control module, the heat exchanger is connected to the exhaust valve and the electric heating component through the water outlet branch, the heat exchanger is connected to the water pump through the water inlet branch, and a system return water temperature probe is arranged on the water inlet branch between the water pump and the heat exchanger; the above-mentioned electric heating component is respectively connected to the heat exchanger and the water flow switch, and a system outlet water temperature probe is arranged between the electric heating component and the water flow switch; the water outlet branch is divided into a first branch and a second branch after passing through the water flow switch, wherein a heating electric two-way valve (i.e., the first valve) is arranged on the first branch, and a heat storage electric two-way valve (i.e., the second valve) is arranged on the second branch, the first branch is connected to the water inlet of the heating module, and the second branch is connected to the heat storage module.

[0066] It can be understood that the water inlet branch in the control module is provided with a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump and a system return water temperature probe, and the heat exchanger is connected to the water pump through the water inlet branch, wherein a system return water temperature probe is provided on the water inlet branch between the water pump and the heat exchanger; the pressure relief valve is connected to the water pump and the pressure gauge respectively; the expansion tank is connected to the pressure gauge and the system flow meter respectively; the system flow meter is connected to the return water branches of the heat storage module and the heating module respectively, the water pump is arranged between the heat exchanger and the water outlet flow path of the heating component, and the water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component.

[0067] It can be understood that the refrigerant inlet and outlet pipes of the outdoor unit are connected to the plate heat exchanger in the control module, and the water refrigerant heat exchange is realized through the plate heat exchanger. It flows out from the plate heat exchanger, flows through the electric heating and water flow switch, and is connected in parallel with the water inlet flow paths of the heating terminal and the heat storage module through the heating electric two-way valve and the heat storage electric two-way valve. Their water outlet flow paths are combined and flow through the system flow meter, water pump, and system return water temperature probe.

[0068] It should be understood that the heat storage module can be composed of a sealing structure, a filling structure, a tube sheet anti-scratch structure, a box structure, a heat exchanger and a phase change material. When the heat storage temperature is less than 80°C, the energy storage density of the phase change material is greater than that of a water tank with the same heat storage capacity, and the volume is smaller (50%). The heat storage module is used to replace the water tank for air source heating to reduce the living area occupied. Each component assembly has a certain structural strength and can be assembled, transported and stacked normally. The sealing structure can be provided with a sealing ring, and the upper and lower fasteners are composed. The distance between the bottom of the sealing structure and the top of the heat exchanger can be 0.5mm-300mm. The filling structure can be a common sealing structure for filling phase change materials. The distance between the bottom of the filling structure and the top of the heat exchanger can be 0.5mm-300mm. The heat exchanger in the above heat storage module can be a tube-fin heat exchanger. The tube sheet anti-scratch structure is located on the copper tubes on both sides to protect the copper tubes from scratches or collision deformation. The distance between the anti-scratch plate and the copper tube (bend) can be 0.5mm-50mm.

[0069] It should be noted that the current heating return water temperature may be the return water temperature discharged from the heating module, and the target heating temperature may be the heating temperature of the heating system set by the user, that is, the heating temperature required by the user.

[0070] Step S20: Determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit.

[0071] It should be noted that the above-mentioned operating temperature difference threshold may be the return water and outlet water temperature difference threshold of the system for the external function to work normally.

[0072] It should be understood that this embodiment determines the current working mode of the heating system by calculating the temperature difference between the return water temperature of the heating module and the heating temperature set by the user, and by judging whether the temperature difference is greater than the return water and outlet water temperature difference threshold of the system for normal operation of the external function.

[0073] Step S30: determining the current working mode of the heating system based on the judgment result and the current heat storage amount.

[0074] It should be noted that the user's heating demand is determined based on the judgment result, and whether the heat storage module can currently provide heating is determined based on the current heat storage capacity.

[0075] It should be understood that when the user's heating demand is large, heat is generated externally, and the heat is used to heat the heating module through the heat exchanger; when the user's heating demand is not large, and the heat storage module stores less heat, heat is generated externally, and the heat is used to heat the heating module and the heat storage module at the same time through the heat exchanger; when the user's heating demand is not large, but the heat storage module stores more heat, heating is provided through the heat storage module, thereby effectively reducing the energy consumption of the heating system.

[0076] Step S40: Controlling the water pump, the first valve and the second valve respectively based on the current working mode.

[0077] It is understandable that when the current working mode is heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal. This mode can directly heat the heating module, thereby ensuring the heating rate and heating efficiency.

[0078] It should be understood that when the current working mode is the thermal storage heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal and the thermal storage module at the same time. While heating the heating module, it also heats the thermal storage module. This mode can store part of the system output heat in the phase change thermal storage module when the user's heating load is low, delaying the rise of the system return water temperature, thereby avoiding frequent start and stop of the external machine.

[0079] It is understandable that when the current working mode is the heat storage module heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the water pump is controlled to start, and the heat storage module is used for heating. This mode can use the heat of the phase change heat storage module for heating when the user's heating load is low, thereby avoiding frequent start and stop of the outdoor unit.

[0080] It should be noted that the current working mode also includes a defrosting mode and a heating and heat storage mode.

[0081] It should be understood that when the current working mode is the defrost mode, the first valve is controlled to be closed, the second valve is opened, and the water pump is turned on, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the outdoor unit defrost is turned on, and the heat storage module is used to supply heat for defrosting. If a household has heating needs, then in the above mode, check whether the system outlet water temperature is greater than the heating temperature. If the system outlet water temperature is greater than the heating temperature, the first valve is controlled to be opened, and the heat storage module is used to supply heat for defrosting and heating, thereby reducing the impact of the compressor on the water temperature during defrosting.

[0082] It is understandable that when the current working mode is the heating and heat storage mode, the user has no heating demand but hot water demand, so this mode is adopted. In this mode, the water pump is controlled to start, the first valve is closed, and the second valve is opened, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heat storage module.

[0083] This embodiment controls the water pump, the first valve and the second valve respectively based on the current working mode of the heating system, so as to control the valve switch in different heating application scenarios to switch the appropriate heating flow path, thereby effectively reducing the number of starts and stops of the heating system under low load conditions, ensuring the operating stability of the heating system, and greatly improving the life of the heating system.

[0084] refer to Figure 5 , Figure 5 It is a flow chart of a second embodiment of a control method for a heating system according to the present invention.

[0085] Based on the above first embodiment, in this embodiment, the current working mode includes a heating mode, a heat storage heating mode and a heat storage module heating mode, and the step S30 includes:

[0086] Step S31: when the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit, determining that the current operating mode of the heating system is the heating mode;

[0087] Step S32: when the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the operating temperature difference threshold of the outdoor unit, and the current heat storage amount does not exceed the preset heat storage threshold, determining that the current operating mode of the heating system is the heat storage heating mode;

[0088] Step S33: When the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the preset temperature difference threshold of the outdoor unit, and the current heat storage amount exceeds the preset heat storage threshold, determine that the current working mode of the heating system is the heat storage module heating mode.

[0089] It should be understood that the heating mode may be a mode in which the heating module is heated only by external heating. The heat storage heating mode may be a mode in which heat is supplied to the heating module and the heat storage module simultaneously by external heating. The heat storage module heating mode may be a mode in which the heat stored in the heat storage module is used for heating only.

[0090] It should be noted that when the temperature difference is greater than the return water and outlet water temperature difference threshold for the normal operation of the external function, it is determined that the heating heat demand is large, and the heating mode is entered. The heat is generated by the external function, and the heat passes through the plate heat exchanger to supply heat to the heating terminal.

[0091] It can be understood that when the temperature difference is not greater than the return water and outlet water temperature difference threshold of the system for normal operation of the external function, it is determined whether the current heat storage capacity of the heat storage module exceeds the preset heat storage threshold (for example, the preset heat storage threshold can be 50%-90% of the heat storage capacity). If it does not exceed the preset heat storage threshold, it is determined that the current heat storage of the heat storage module is less, and the heat storage heating mode is entered. The external function generates heat, and the heat passes through the plate heat exchanger to heat the heating terminal and the heat storage module at the same time.

[0092] It should be understood that when the temperature difference is not greater than the return water and outlet water temperature difference threshold of the external function system for normal operation, and the heat storage capacity of the heat storage module exceeds the preset heat storage threshold, it is determined that the current heat storage capacity of the heat storage module is large, and the heat storage module can be used to heat the heating module.

[0093] Furthermore, when the heating system is in the heating mode, step S40 may include:

[0094] respectively controlling the water pump to start, the first valve to start, and the second valve to close, and controlling the external unit to heat, so as to supply heat to the heating module through the heat exchanger connected to the external unit;

[0095] Monitoring whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold;

[0096] If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, the external unit is controlled to shut down.

[0097] It should be noted that the heating mode may be a mode in which the heating module is heated solely by external heating.

[0098] It is understandable that when the current working mode is heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal. This mode can directly heat the heating module, thereby ensuring the heating rate and heating efficiency.

[0099] Further, when the heating system is in the heat storage heating mode, the step S40 may include:

[0100] respectively controlling the water pump to start, the first valve to start, and the second valve to open, and controlling the external unit to heat, so as to supply heat to the heating module and the heat storage module through the heat exchanger connected to the external unit;

[0101] Monitor whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold, and whether the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit;

[0102] If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, or the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit, the external unit is controlled to shut down.

[0103] It should be noted that the heat storage heating mode can be a mode in which heat is generated by an external machine and heat is supplied to the heating module and the heat storage module at the same time.

[0104] It should be understood that when the current working mode is the thermal storage heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal and the thermal storage module at the same time. While heating the heating module, it also heats the thermal storage module. This mode can store part of the system output heat in the phase change thermal storage module when the user's heating load is low, delaying the rise of the system return water temperature, thereby avoiding frequent start and stop of the external machine.

[0105] Furthermore, when the heating system is in the thermal storage module heating mode, step S40 may include:

[0106] The water pump, the first valve and the second valve are controlled to be turned on respectively, and the external unit is turned off to supply heat to the heating component through the heat storage module.

[0107] It should be noted that the thermal storage module heating mode may be a mode in which heating is performed only by heat stored in the thermal storage module.

[0108] It is understandable that when the current working mode is the heat storage module heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the water pump is controlled to start, and the heat storage module is used for heating. This mode can use the heat of the phase change heat storage module for heating when the user's heating load is low, thereby avoiding frequent start and stop of the outdoor unit.

[0109] Furthermore, the current working mode also includes a defrost mode; when the heating system is in the defrost mode, the control method of the heating system may include:

[0110] When the outdoor machine has a defrosting demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, so as to control the outdoor machine to perform cooling, so as to provide heat to the outdoor machine through the heat storage module.

[0111] It should be noted that the defrost mode may be a mode in which the external unit is defrosted by means of the heat storage module, and heat is supplied by the heat storage module to provide heat to the external unit for defrosting.

[0112] Furthermore, in order to realize defrosting and heating at the same time, the control method of the heating system may include:

[0113] When the outdoor unit has a defrosting demand and the heating component has a heating demand, the water pump is controlled to be turned on, the first valve is closed, and the second valve is controlled to be opened, so as to control the outdoor unit to perform cooling, so as to provide heating to the outdoor unit through the heat storage module;

[0114] Monitoring the current outlet water temperature of the heat exchanger and the target heating temperature;

[0115] When the current outlet water temperature is greater than the target heating temperature, the first valve is controlled to open.

[0116] It should be understood that when the current working mode is the defrost mode, the first valve is controlled to be closed, the second valve is opened, and the water pump is turned on, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the outdoor unit defrost is turned on, and the heat storage module is used to supply heat for defrosting. If a household has heating needs, then in the above mode, check whether the system outlet water temperature is greater than the heating temperature. If the system outlet water temperature is greater than the heating temperature, the first valve is controlled to be opened, and the heat storage module is used to supply heat for defrosting and heating, thereby reducing the impact of the compressor on the water temperature during defrosting.

[0117] Furthermore, the current working mode also includes a heating and heat storage mode; when the heating system is in the heating and heat storage mode, the control method of the heating system may include:

[0118] When the heat storage component has a heat storage demand and the heating component does not have a heating demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, and the external unit is controlled to heat, so as to heat the heat storage module through the heat exchanger connected to the external unit.

[0119] It should be noted that the heating thermal storage module can be in a mode where heat is generated by an external machine when the user has no heating demand, thereby accumulating heat for the thermal storage module, thereby increasing the heat storage capacity of the thermal storage module.

[0120] It is understandable that when the current working mode is the heating and heat storage mode, the user has no heating demand but hot water demand, so this mode is adopted. In this mode, the water pump is controlled to start, the first valve is closed, and the second valve is opened, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heat storage module.

[0121] This embodiment determines the temperature difference between the return water temperature of the heating module and the heating temperature required by the user, determines the user's heating demand based on the temperature difference and the return water and outlet water temperature difference threshold of the external function normal operation system, and determines whether the heat storage module has sufficient heat storage based on the current heat storage capacity of the heat storage module, thereby accurately selecting the appropriate working mode of the heating system, and controlling the heating system based on the working mode, thereby effectively improving the heating efficiency and heating energy efficiency of the system.

[0122] In addition, an embodiment of the present invention further provides a heating system, and the control method of the heating system is applied to the heating system described in this embodiment.

[0123] Reference Figure 3 , Figure 3 It is a schematic diagram of the structure of a heating system, the heating system includes an outdoor unit, a heat storage component, a control component and a heating component, the control component includes a heat exchanger, a water pump, a first valve and a second valve, the refrigerant inlet and outlet pipes of the outdoor unit are connected to the heat exchanger, the heat exchange flow path of the heat exchanger is connected to the first valve and the second valve respectively, the heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heating component through the first valve, the heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heat storage component through the second valve, the water pump is arranged between the heat exchanger and the water outlet flow path of the heating component, and the water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component.

[0124] Understandably, see Figure 3 , Figure 3 This is a schematic diagram of the heating system structure. The heating system includes an outdoor unit, a control module, a domestic hot water terminal, a heat storage module, a heating module, and a tap water terminal. The tap water terminal is used to supply water to the heating system, and the domestic hot water terminal is used to supply domestic hot water to users using the hot water discharged from the heating system. The outdoor unit is connected to the control module, and the control module is respectively connected to the outdoor unit, the heat storage module, the heating module, the domestic hot water terminal, and the tap water terminal.

[0125] It should be understood that a heat exchanger is provided in the control module, and the refrigerant flow path of the external unit is connected to the control module through the heat exchanger, so as to realize heat exchange of the control module through the external unit. The above-mentioned control module includes a plate heat exchanger, an exhaust valve, an electric heating component, a system outlet water temperature probe, a water flow switch, a heating electric two-way valve (i.e., the first valve), a heat storage electric two-way valve (i.e., the second valve), a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump, a system return water temperature probe and a domestic hot water terminal flow meter, a domestic hot water mixed water temperature probe, a thermal storage module outlet water temperature probe and a thermal storage module inlet water temperature probe.

[0126] It should be noted that the heat exchanger is respectively connected to the water outlet branch and the water inlet branch in the control module, the heat exchanger is connected to the exhaust valve and the electric heating component through the water outlet branch, the heat exchanger is connected to the water pump through the water inlet branch, and a system return water temperature probe is arranged on the water inlet branch between the water pump and the heat exchanger; the above-mentioned electric heating component is respectively connected to the heat exchanger and the water flow switch, and a system outlet water temperature probe is arranged between the electric heating component and the water flow switch; the water outlet branch is divided into a first branch and a second branch after passing through the water flow switch, wherein a heating electric two-way valve (i.e., the first valve) is arranged on the first branch, and a heat storage electric two-way valve (i.e., the second valve) is arranged on the second branch, the first branch is connected to the water inlet of the heating module, and the second branch is connected to the heat storage module.

[0127] It is understandable that, referring to Figure 4 , Figure 4 This is a schematic diagram of the control module structure. The water inlet branch in the control module is provided with a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump and a system return water temperature probe. The heat exchanger is connected to the water pump through the water inlet branch, wherein a system return water temperature probe is provided on the water inlet branch between the water pump and the heat exchanger; the pressure relief valve is respectively connected to the water pump and the pressure gauge; the expansion tank is respectively connected to the pressure gauge and the system flow meter; the system flow meter is respectively connected to the return water branches of the heat storage module and the heating module.

[0128] It can be understood that the refrigerant inlet and outlet pipes of the outdoor unit are connected to the plate heat exchanger in the control module, and the water refrigerant heat exchange is realized through the plate heat exchanger. It flows out from the plate heat exchanger, flows through the electric heating and water flow switch, and is connected in parallel with the water inlet flow paths of the heating terminal and the heat storage module through the heating electric two-way valve and the heat storage electric two-way valve. Their water outlet flow paths are combined and flow through the system flow meter, water pump, and system return water temperature probe.

[0129] It should be understood that the heat storage module can be composed of a sealing structure, a filling structure, a tube sheet anti-scratch structure, a box structure, a heat exchanger and a phase change material. When the heat storage temperature is less than 80°C, the energy storage density of the phase change material is greater than that of a water tank with the same heat storage capacity, and the volume is smaller (50%). The heat storage module is used to replace the water tank for air source heating to reduce the living area occupied. Each component assembly has a certain structural strength and can be assembled, transported and stacked normally. The sealing structure can be provided with a sealing ring, and the upper and lower fasteners are composed. The distance between the bottom of the sealing structure and the top of the heat exchanger can be 0.5mm-300mm. The filling structure can be a common sealing structure for filling phase change materials. The distance between the bottom of the filling structure and the top of the heat exchanger can be 0.5mm-300mm. The heat exchanger in the above heat storage module can be a tube-fin heat exchanger. The tube sheet anti-scratch structure is located on the copper tubes on both sides to protect the copper tubes from scratches or collision deformation. The distance between the anti-scratch plate and the copper tube (bend) can be 0.5mm-50mm.

[0130] In addition, an embodiment of the present invention further proposes a storage medium, on which a control program of a heating system is stored. When the control program of the heating system is executed by a processor, the steps of the control method of the heating system described above are implemented.

[0131] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0132] Reference Figure 6 , Figure 6 It is a structural block diagram of the first embodiment of the control device of the heating system of the present invention.

[0133] like Figure 6 As shown, the control device of the heating system provided in the embodiment of the present invention includes:

[0134] The temperature acquisition module 10 is used to obtain the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module when the heating component has a heating demand;

[0135] The temperature difference monitoring module 20 is used to determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit;

[0136] A mode determination module 30, configured to determine a current working mode of the heating system based on a determination result and the current heat storage amount;

[0137] The heat exchange control module 40 is used to control the water pump, the first valve and the second valve respectively based on the current working mode.

[0138] Understandably, see Figure 3 , Figure 3 This is a schematic diagram of the heating system structure. The heating system includes an outdoor unit, a control module, a domestic hot water terminal, a heat storage module, a heating module, and a tap water terminal. The tap water terminal is used to supply water to the heating system, and the domestic hot water terminal is used to supply domestic hot water to users using the hot water discharged from the heating system. The outdoor unit is connected to the control module, and the control module is respectively connected to the outdoor unit, the heat storage module, the heating module, the domestic hot water terminal, and the tap water terminal.

[0139] It should be understood that a heat exchanger is provided in the control module, and the refrigerant flow path of the external unit is connected to the control module through the heat exchanger, so as to realize heat exchange of the control module through the external unit. The above-mentioned control module includes a plate heat exchanger, an exhaust valve, an electric heating component, a system outlet water temperature probe, a water flow switch, a heating electric two-way valve (i.e., the first valve), a heat storage electric two-way valve (i.e., the second valve), a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump, a system return water temperature probe and a domestic hot water terminal flow meter, a domestic hot water mixed water temperature probe, a thermal storage module outlet water temperature probe and a thermal storage module inlet water temperature probe.

[0140] It should be noted that the heat exchanger is respectively connected to the water outlet branch and the water inlet branch in the control module, the heat exchanger is connected to the exhaust valve and the electric heating component through the water outlet branch, the heat exchanger is connected to the water pump through the water inlet branch, and a system return water temperature probe is arranged on the water inlet branch between the water pump and the heat exchanger; the above-mentioned electric heating component is respectively connected to the heat exchanger and the water flow switch, and a system outlet water temperature probe is arranged between the electric heating component and the water flow switch; the water outlet branch is divided into a first branch and a second branch after passing through the water flow switch, wherein a heating electric two-way valve (i.e., the first valve) is arranged on the first branch, and a heat storage electric two-way valve (i.e., the second valve) is arranged on the second branch, the first branch is connected to the water inlet of the heating module, and the second branch is connected to the heat storage module.

[0141] It can be understood that the water inlet branch in the control module is provided with a system flow meter, an expansion tank, a pressure gauge, a pressure relief valve, a water pump and a system return water temperature probe, and the heat exchanger is connected to the water pump through the water inlet branch, wherein the water inlet branch between the water pump and the heat exchanger is provided with a system return water temperature control; the pressure relief valve is connected to the water pump and the pressure gauge respectively; the expansion tank is connected to the pressure gauge and the system flow meter respectively; the system flow meter is connected to the return water branches of the heat storage module and the heating module respectively.

[0142] It can be understood that the refrigerant inlet and outlet pipes of the outdoor unit are connected to the plate heat exchanger in the control module, and the water refrigerant heat exchange is realized through the plate heat exchanger. It flows out from the plate heat exchanger, flows through the electric heating and water flow switch, and is connected in parallel with the water inlet flow paths of the heating terminal and the heat storage module through the heating electric two-way valve and the heat storage electric two-way valve. Their water outlet flow paths are combined and flow through the system flow meter, water pump, and system return water temperature probe.

[0143] It should be understood that the heat storage module can be composed of a sealing structure, a filling structure, a tube sheet anti-scratch structure, a box structure, a heat exchanger and a phase change material. When the heat storage temperature is less than 80°C, the energy storage density of the phase change material is greater than that of a water tank with the same heat storage capacity, and the volume is smaller (50%). The heat storage module is used to replace the water tank for air source heating to reduce the living area occupied. Each component assembly has a certain structural strength and can be assembled, transported and stacked normally. The sealing structure can be provided with a sealing ring, and the upper and lower fasteners are composed. The distance between the bottom of the sealing structure and the top of the heat exchanger can be 0.5mm-300mm. The filling structure can be a common sealing structure for filling phase change materials. The distance between the bottom of the filling structure and the top of the heat exchanger can be 0.5mm-300mm. The heat exchanger in the above heat storage module can be a tube-fin heat exchanger. The tube sheet anti-scratch structure is located on the copper tubes on both sides to protect the copper tubes from scratches or collision deformation. The distance between the anti-scratch plate and the copper tube (bend) can be 0.5mm-50mm.

[0144] It should be noted that the current heating return water temperature may be the return water temperature discharged from the heating module, and the target heating temperature may be the heating temperature of the heating system set by the user, that is, the heating temperature required by the user.

[0145] It should be noted that the above-mentioned operating temperature difference threshold may be the return water and outlet water temperature difference threshold of the system for the external function to work normally.

[0146] It should be understood that this embodiment determines the current working mode of the heating system by calculating the temperature difference between the return water temperature of the heating module and the heating temperature set by the user, and by judging whether the temperature difference is greater than the return water and outlet water temperature difference threshold of the system for normal operation of the external function.

[0147] It should be noted that the user's heating demand is determined based on the judgment result, and whether the heat storage module can currently provide heating is determined based on the current heat storage capacity.

[0148] It should be understood that when the user's heating demand is large, heat is generated externally, and the heat is used to heat the heating module through the heat exchanger; when the user's heating demand is not large, and the heat storage module stores less heat, heat is generated externally, and the heat is used to heat the heating module and the heat storage module at the same time through the heat exchanger; when the user's heating demand is not large, but the heat storage module stores more heat, heating is provided through the heat storage module, thereby effectively reducing the energy consumption of the heating system.

[0149] It is understandable that when the current working mode is heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal. This mode can directly heat the heating module, thereby ensuring the heating rate and heating efficiency.

[0150] It should be understood that when the current working mode is the thermal storage heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heating terminal and the thermal storage module at the same time. While heating the heating module, it also heats the thermal storage module. This mode can store part of the system output heat in the phase change thermal storage module when the user's heating load is low, delaying the rise of the system return water temperature, thereby avoiding frequent start and stop of the external machine.

[0151] It is understandable that when the current working mode is the heat storage module heating mode, the water pump is controlled to start, the first valve is opened, the second valve is closed, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the water pump is controlled to start, and the heat storage module is used for heating. This mode can use the heat of the phase change heat storage module for heating when the user's heating load is low, thereby avoiding frequent start and stop of the outdoor unit.

[0152] It should be noted that the current working mode also includes a defrosting mode and a heating and heat storage mode.

[0153] It should be understood that when the current working mode is the defrost mode, the first valve is controlled to be closed, the second valve is opened, and the water pump is turned on, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the outdoor unit defrost is turned on, and the heat storage module is used to supply heat for defrosting. If a household has heating needs, then in the above mode, check whether the system outlet water temperature is greater than the heating temperature. If the system outlet water temperature is greater than the heating temperature, the first valve is controlled to be opened, and the heat storage module is used to supply heat for defrosting and heating, thereby reducing the impact of the compressor on the water temperature during defrosting.

[0154] It is understandable that when the current working mode is the heating and heat storage mode, the user has no heating demand but hot water demand, so this mode is adopted. In this mode, the water pump is controlled to start, the first valve is closed, and the second valve is opened, and the water flow switch is used to check whether the water circuit is normal. If the water circuit is normal, the heat is generated by the external machine, and the heat passes through the plate heat exchanger to heat the heat storage module.

[0155] This embodiment controls the water pump, the first valve and the second valve respectively based on the current working mode of the heating system, so as to control the valve switch in different heating application scenarios to switch the appropriate heating flow path, thereby effectively reducing the number of starts and stops of the heating system under low load conditions, ensuring the operating stability of the heating system, and greatly improving the life of the heating system.

[0156] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0157] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0158] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the control method of the heating system provided in any embodiment of the present invention, and will not be repeated here.

[0159] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0160] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0161] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0162] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling a heating system, characterized in that: The control method of the heating system is applied to a heating system, the heating system comprises an outdoor unit, a heat storage component, a control component and a heating component, the control component comprises a heat exchanger, a water pump, a first valve and a second valve, the refrigerant inlet and outlet pipes of the outdoor unit are connected with the heat exchanger, the heat exchange flow path of the heat exchanger is connected with the first valve and the second valve respectively, the heat exchange flow path of the heat exchanger is connected with the water inlet flow path of the heating component through the first valve, the heat exchange flow path of the heat exchanger is connected with the water inlet flow path of the heat storage component through the second valve, the water pump is arranged between the heat exchanger and the water outlet flow path of the heating component, and the water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component; The control method of the heating system comprises: When the heating component has a heating demand, obtaining the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module; Determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit; Determining a current operating mode of the heating system based on the judgment result and the current heat storage; The water pump, the first valve and the second valve are controlled respectively based on the current working mode.

2. The control method of the heating system according to claim 1, characterized in that: The current working mode includes a heating mode, a heat storage heating mode and a heat storage module heating mode; The determining the current working mode of the heating system based on the judgment result and the current heat storage comprises: When the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the external unit, determining that the current operating mode of the heating system is the heating mode; When the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the operating temperature difference threshold of the outdoor unit, and the current heat storage amount does not exceed the preset heat storage threshold, determining that the current operating mode of the heating system is the heat storage heating mode; When the temperature difference between the current heating return water temperature and the target heating temperature does not exceed the preset temperature difference threshold of the external unit, and the current heat storage exceeds the preset heat storage threshold, it is determined that the current working mode of the heating system is the heat storage module heating mode.

3. The control method of the heating system according to claim 2, characterized in that: When the heating system is in the heating mode, the water pump, the first valve and the second valve are controlled respectively, including: respectively controlling the water pump to start, the first valve to start, and the second valve to close, and controlling the external unit to heat, so as to supply heat to the heating module through the heat exchanger connected to the external unit; Monitoring whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold; If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, the external unit is controlled to shut down.

4. The control method of the heating system according to claim 2, characterized in that: When the heating system is in the heat storage heating mode, the water pump, the first valve and the second valve are controlled respectively, including: respectively controlling the water pump to start, the first valve to start, and the second valve to open, and controlling the external unit to heat, so as to supply heat to the heating module and the heat storage module through the heat exchanger connected to the external unit; Monitor whether the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than a preset threshold, and whether the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit; If the absolute value of the difference between the current outlet water temperature of the heat exchanger and the preset shutdown temperature is lower than the preset threshold, or the difference between the current return water temperature of the heat exchanger and the current outlet water temperature of the heat exchanger is lower than the operating temperature difference threshold of the external unit, the external unit is controlled to shut down.

5. The control method of the heating system according to claim 2, characterized in that: When the heating system is in the heating mode of the thermal storage module, the water pump, the first valve and the second valve are controlled respectively, including: The water pump, the first valve and the second valve are controlled to be turned on respectively, and the external unit is turned off to supply heat to the heating component through the heat storage module.

6. The control method of the heating system according to claim 1, characterized in that: The control method of the heating system further comprises: When the outdoor machine has a defrosting demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, so as to control the outdoor machine to perform cooling, so as to provide heat to the outdoor machine through the heat storage module.

7. The control method of the heating system according to claim 1, characterized in that: The control method of the heating system further comprises: When the outdoor unit has a defrosting demand and the heating component has a heating demand, the water pump is controlled to be turned on, the first valve is closed, and the second valve is controlled to be opened, so as to control the outdoor unit to perform cooling, so as to provide heating to the outdoor unit through the heat storage module; Monitoring the current outlet water temperature of the heat exchanger and the target heating temperature; When the current outlet water temperature is greater than the target heating temperature, the first valve is controlled to open.

8. The method for controlling a heating system according to claim 1, characterized in that: The control method of the heating system further comprises: When the heat storage component has a heat storage demand and the heating component does not have a heating demand, the water pump is controlled to be turned on, the first valve is controlled to be closed, and the second valve is controlled to be opened, and the external unit is controlled to heat, so as to heat the heat storage module through the heat exchanger connected to the external unit.

9. A heating system, characterized in that: The heating system includes an outdoor unit, a heat storage component, a control component and a heating component. The control component includes a heat exchanger, a water pump, a first valve and a second valve. The refrigerant inlet and outlet pipes of the outdoor unit are connected to the heat exchanger. The heat exchange flow path of the heat exchanger is connected to the first valve and the second valve respectively. The heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heating component through the first valve. The heat exchange flow path of the heat exchanger is connected to the water inlet flow path of the heat storage component through the second valve. The water pump is arranged between the heat exchanger and the water outlet flow path of the heating component. The water pump is also arranged between the heat exchanger and the water outlet flow path of the heating component.

10. A control device for a heating system, characterized in that: The control device of the heating system comprises: A temperature acquisition module, used to acquire the current heating return water temperature and the target heating temperature, as well as the current heat storage capacity of the heat storage module when the heating component has a heating demand; A temperature difference monitoring module is used to determine whether the temperature difference between the current heating return water temperature and the target heating temperature exceeds the operating temperature difference threshold of the outdoor unit; A mode determination module, configured to determine a current working mode of the heating system based on a determination result and the current heat storage; A heat exchange control module is used to control the water pump, the first valve and the second valve respectively based on the current working mode.

11. A control device for a heating system, characterized in that: The control device of the heating system comprises: a memory, a processor, and a control program of the heating system stored in the memory and executable on the processor, wherein the control program of the heating system is configured to implement the control method of the heating system according to any one of claims 1 to 8.

12. A storage medium, characterized in that: The storage medium stores a control program of the heating system, and when the control program of the heating system is executed by the processor, the control method of the heating system according to any one of claims 1 to 8 is implemented.

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