Hot water system and control method, device and equipment thereof

Abstract

The present invention relates to a hot water system and its control method, device, and equipment, belonging to the field of hot water regulation technology. In this hot water system, a solar collector heats water in an insulated water tank using solar energy; a controller controls the opening and closing of different operating modes of a direct-heating water heater according to the current liquid level of the insulated water tank, thereby enabling joint control of the direct-heating water heater and the solar collector. Therefore, the technical solution provided in this application utilizes the current liquid level of the insulated water tank to reflect the user's water demand, thereby determining the operating mode of the direct-heating water heater based on the user's water demand. Combining the solar water collector and an air source heat pump, the system reduces hot water energy consumption while ensuring hot water capacity.

Description

Technical Field

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

[0002] Improvements in living standards have led to a growing demand for hot water. This high demand and long peak periods of hot water use in real life result in significant energy consumption for hot water systems. In the context of energy conservation and environmental protection, reducing the energy consumption of hot water systems has become a key concern.

[0003] Solar water heaters are commonly used to address green energy conservation and reduce the energy consumption of hot water systems. However, these heaters are susceptible to weather conditions, severely impacting their hot water capacity in low-light conditions. Air-source heat pumps, on the other hand, offer instant hot water and high energy efficiency. Therefore, combining solar water heaters and air-source heat pumps to maintain hot water capacity while reducing hot water consumption has become a pressing technical challenge in the existing technology. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a hot water system and a control method, device and equipment thereof to overcome the problem of poor combination effect of the current solar water collector and air source heat pump.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] In one aspect, a hot water system comprises: an insulated water tank, a solar thermal collector, a direct-heating water heater unit, and a controller; a first end of the solar thermal collector and a second end of the solar thermal collector are connected to a first end and a second end of the insulated water tank, respectively; a first end of the direct-heating water heater unit and a second end of the direct-heating water heater unit are connected to a third end and a fourth end of the insulated water tank, respectively;

[0007] A first circulation pump is provided on the connecting pipe between the solar water collector and the thermal insulation water tank; a second circulation pump is provided on the connecting pipe between the direct heating water heater and the thermal insulation water tank;

[0008] The third end of the direct heating water heater is connected to cold water; a liquid level detection component is provided in the thermal insulation water tank;

[0009] The controller is respectively connected to the first circulation pump, the second circulation pump, the liquid level detection component and the direct heating water heater; the controller controls the opening and closing of different working modes of the direct heating water heater according to the current liquid level of the insulated water tank detected by the liquid level detection component.

[0010] Optionally, a first temperature detection component is provided in the solar thermal collector, and a second temperature detection component is provided in the thermal insulation water tank; the first temperature detection component and the second temperature detection component are both connected to the controller;

[0011] The first temperature detection component is used to detect the temperature of the solar collector in the solar collector; the second temperature detection component is used to detect the temperature of the thermal insulation water tank in the thermal insulation water tank;

[0012] The controller is used to control the switch of the first circulation pump according to the temperature of the solar collector and the temperature of the thermal insulation water tank.

[0013] Optionally, the fourth end of the thermal insulation water tank is connected to cold water through a water supply solenoid valve;

[0014] The water replenishment solenoid valve is connected to the controller, and the controller is used to control the opening and closing of the water replenishment solenoid valve according to the temperature of the thermal insulation water tank and / or the current liquid level of the thermal insulation water tank.

[0015] In another aspect, a method for controlling a hot water system is provided, applied to any of the above-mentioned hot water systems, the method comprising:

[0016] Within a first preset time period, if the current liquid level of the thermal insulation water tank is less than or equal to a first liquid level threshold, the direct heating water heater is triggered to start a direct heating working mode;

[0017] Within the second preset time period, if the current liquid level of the insulated water tank is less than or equal to a second liquid level threshold, the direct heating water heater is triggered to start the direct heating working mode; the first liquid level threshold is less than the second liquid level threshold.

[0018] Optionally, also include:

[0019] Within a first preset time period, if the current liquid level of the thermal insulation water tank is greater than a third liquid level threshold, the direct heating water heater is triggered to shut down the direct heating working mode; the third liquid level threshold is greater than the first liquid level threshold;

[0020] Within the second preset time period, if the current liquid level of the insulated water tank is greater than a fourth liquid level threshold, the direct heating water heater is triggered to shut down the direct heating working mode; the fourth liquid level threshold is greater than the second liquid level threshold.

[0021] Optionally, applied to the hot water system described above, the control method further includes:

[0022] Obtaining the temperature of the insulated water tank in the insulated water tank and the temperature of the solar water heater in the solar water heater; calculating the temperature difference between the temperature of the solar water heater and the temperature of the insulated water tank;

[0023] When the temperature difference is greater than or equal to a first temperature threshold, and the temperature of the solar water collector is less than a second temperature threshold, triggering the first circulation pump to start;

[0024] When the temperature difference is less than a third temperature threshold, or the temperature of the insulated water tank is greater than or equal to the second temperature threshold, the first circulation pump is triggered to shut down; the third temperature threshold is less than the first temperature threshold.

[0025] Optionally, applied to the hot water system described above, the control method further includes:

[0026] When the temperature of the solar water heater is less than or equal to a first temperature threshold, and the temperature of the thermal insulation water tank is greater than or equal to a fourth temperature threshold, the first circulation pump is triggered to start;

[0027] When the temperature of the solar water heater is greater than or equal to a fifth temperature threshold, or the temperature of the thermal insulation water tank is lower than the temperature of the solar water heater, the first circulation pump is triggered to shut down; the fifth temperature threshold is greater than the first temperature threshold.

[0028] Optionally, applied to the hot water system described above, the control method further includes:

[0029] When the temperature of the insulated water tank is less than or equal to a sixth temperature threshold, the second circulation pump is triggered to start;

[0030] When the temperature of the insulated water tank is greater than or equal to a seventh temperature threshold, the second circulation pump is triggered to shut down;

[0031] The seventh temperature threshold is greater than the sixth temperature threshold.

[0032] Optionally, applied to the hot water system described above, the control method further includes:

[0033] When the temperature of the thermal insulation water tank is greater than or equal to the eighth temperature threshold, and the current liquid level of the thermal insulation water tank is less than or equal to the fourth liquid level threshold, the water supply solenoid valve is triggered to open;

[0034] When the temperature of the thermal insulation water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the thermal insulation water tank is greater than the fourth liquid level threshold, the water supply solenoid valve is triggered to close;

[0035] The ninth temperature threshold is lower than the eighth temperature threshold.

[0036] In another aspect, a control device for a hot water system is provided, applied to any of the above-mentioned hot water systems, the device comprising:

[0037] a first triggering module, configured to trigger the direct heating water heater to start a direct heating operation mode if the current liquid level of the thermal insulation water tank is less than or equal to a first liquid level threshold within a first preset time period;

[0038] The second trigger module is used to trigger the direct heating water heater to start the direct heating working mode if the current liquid level of the insulated water tank is less than or equal to a second liquid level threshold within a second preset time period; the first liquid level threshold is less than the second liquid level threshold.

[0039] In another aspect, a control device for a hot water system includes a processor and a memory, wherein the processor is connected to the memory:

[0040] The processor is configured to call and execute the program stored in the memory;

[0041] The memory is used to store the program, and the program is at least used to execute any one of the above-mentioned hot water system control methods.

[0042] In the hot water system provided by the embodiments of this application, a solar thermal collector heats water in an insulated water tank using solar energy. A controller controls the opening and closing of different operating modes of the direct-heating water heater based on the current liquid level in the insulated water tank, thereby enabling joint control of the direct-heating water heater and the solar thermal collector. Therefore, the technical solution provided by this application utilizes the current liquid level in the insulated water tank to reflect the user's water demand, thereby determining the operating mode of the direct-heating water heater based on the user's water demand. This rationally combines the solar thermal collector and the air source heat pump to ensure hot water production capacity while reducing hot water energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 is a structural schematic diagram of a hot water system according to an exemplary embodiment;

[0045] Figure 2 is a flow chart showing a method for controlling a hot water system according to an exemplary embodiment;

[0046] Figure 3 is a structural schematic diagram of a control device for a hot water system according to an exemplary embodiment;

[0047] Figure 4The figure is a schematic structural diagram of a control device for a hot water system according to an exemplary embodiment. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0049] Solar water heaters are commonly used to address green energy conservation and reduce the energy consumption of hot water systems. However, these heaters are susceptible to weather conditions, severely impacting their hot water capacity in low-light conditions. Air-source heat pumps, on the other hand, offer instant hot water and high energy efficiency. Therefore, combining solar water heaters and air-source heat pumps to maintain hot water capacity while reducing hot water consumption has become a pressing technical challenge in the existing technology.

[0050] Based on this, an embodiment of the present invention provides a hot water system and a control method, device, and equipment thereof.

[0051] Example 1:

[0052] Figure 1 is a structural diagram of a hot water system according to an exemplary embodiment. Figure 1 The hot water system provided in this embodiment may include: an insulated water tank 1, a solar thermal collector 2, a direct heating type water heater unit 3 and a controller; a first end of the solar thermal collector and a second end of the solar thermal collector are respectively connected to a first end and a second end of the insulated water tank; a first end of the direct heating type water heater unit and a second end of the direct heating type water heater unit are respectively connected to a third end and a fourth end of the insulated water tank;

[0053] A first circulation pump D1 is provided on the connecting pipe between the solar water collector and the thermal water tank;

[0054] A second circulation pump D2 is provided on the connecting pipe between the direct heating water heater unit and the insulated water tank;

[0055] The third end of the direct heating hot water unit is connected to cold water; a liquid level detection component is provided in the insulated water tank;

[0056] The controller is respectively connected to the first circulation pump, the second circulation pump, the liquid level detection component and the direct heating water heater; the controller controls the opening and closing of different working modes of the direct heating water heater according to the current liquid level of the insulated water tank detected by the liquid level detection component.

[0057] It is worth noting that in this embodiment, the direct-heating water heater unit may be a direct-heating air-energy water heater unit, and its operating modes may be set to a circulation heating mode and a direct-heating mode. In the direct-heating mode, water is directly heated to a desired temperature; in the circulation heating mode, hot water in the insulated water tank is circulated and heated to a desired temperature.

[0058] Among them, cold water is injected from the cold water side L1, and users use hot water at the user side L2.

[0059] It is understood that in the hot water system provided by the embodiments of this application, the solar collector heats the water in the insulated water tank using solar energy; the controller controls the opening and closing of different operating modes of the direct-heating water heater based on the current liquid level of the insulated water tank, thereby enabling the direct-heating water heater and the solar collector to be jointly controlled. Therefore, the technical solution provided by this application utilizes the current liquid level of the insulated water tank to reflect the user's water demand, thereby determining the operating mode of the direct-heating water heater based on the user's water demand. This rationally combines the solar water heater and the air source heat pump to ensure hot water capacity while reducing hot water energy consumption.

[0060] It is worth noting that, in some embodiments, a first temperature detection component is provided in the solar thermal collector, and a second temperature detection component is provided in the thermal insulation water tank; both the first temperature detection component and the second temperature detection component are connected to the controller;

[0061] The first temperature detection component is used to detect the temperature of the solar collector in the solar collector; the second temperature detection component is used to detect the temperature of the thermal insulation water tank in the thermal insulation water tank;

[0062] The controller is used to control the switch of the first circulation pump according to the temperature of the solar collector and the temperature of the insulation water tank.

[0063] It can be understood that by adopting the technical solution provided in the embodiment of the present application, the circulation control of the solar collector side is achieved by analyzing the temperature of the solar collector and the temperature of the insulation water tank, thereby further increasing the heat on the solar collector side.

[0064] It is worth noting that in some embodiments, the fourth end of the insulated water tank is connected to cold water through a water supply solenoid valve; the water supply solenoid valve is connected to a controller, and the controller is used to control the opening and closing of the water supply solenoid valve according to the temperature of the insulated water tank and / or the current liquid level of the insulated water tank.

[0065] It can be understood that by adopting the technical solution provided in the embodiment of the present application, by detecting the current liquid level of the insulated water tank, the opening and closing of the water supply solenoid valve is controlled by the current liquid level and the temperature of the insulated water tank, so that when the heat of the solar collector is insufficient, the direct heating hot water unit is used to meet the hot water supply.

[0066] Example 2:

[0067] Based on a general inventive concept, an embodiment of the present invention further provides a method for controlling a hot water system.

[0068] Figure 2 is a flow chart of a method for controlling a hot water system according to an exemplary embodiment. The method for controlling a hot water system provided in the embodiment of the present application can be applied to the hot water system described in any of the above embodiments. Figure 2 The technical solution provided in the embodiment of the present application may include the following steps:

[0069] Step S21: within a first preset time period, if the current liquid level of the insulated water tank is less than or equal to a first liquid level threshold, the direct heating water heater is triggered to start a direct heating working mode.

[0070] Among them, the first liquid level threshold can be set according to the user's usage requirements; the current liquid level of the insulation box is detected by the liquid level detection component, which is not specifically limited in this application.

[0071] In an embodiment of the present invention, the insulated water tank can set the liquid level to four levels according to the total amount of hot water throughout the day in the applicable place, with the highest liquid level level being the first liquid level threshold, the lowest liquid level level being the fourth liquid level threshold, and the middle liquid level level being the third liquid level threshold and the second liquid level threshold.

[0072] For example, the first preset time period may be 22:00-14:00 in summer. When the system makes a judgment, it may first determine whether it is summer, and then determine whether it is within the time period of 22:00-14:00 in summer. If so, it means that it is not a peak period for hot water use. Then, it is determined whether the current liquid level of the insulated water tank is less than or equal to the first liquid level threshold. If so, the hot water supply is less at this time. In order to ensure the minimum water consumption and avoid heat waste, the direct heating hot water unit is triggered to start the direct heating working mode to supply hot water.

[0073] It is worth noting that in some embodiments, it also includes: within the first preset time period, if the current liquid level of the insulated water tank is greater than the third liquid level threshold, the direct heating hot water unit is triggered to shut down the direct heating working mode; the third liquid level threshold is greater than the first liquid level threshold.

[0074] For example, after the direct heating water heater starts the direct heating working mode, when the current liquid level of the insulated water tank is greater than or equal to the third liquid level threshold, the hot water supply is guaranteed, triggering the direct heating water heater to turn off the direct heating working mode.

[0075] Step S22: within the second preset time period, if the current liquid level of the insulated water tank is less than or equal to the second liquid level threshold, the direct heating water heater is triggered to start the direct heating working mode; the first liquid level threshold is less than the second liquid level threshold.

[0076] For example, the second preset time period can be 14:00-22:00 in summer. When making a judgment, the system can first determine whether it is summer, and then determine whether it is within the time period of 14:00-22:00 in summer. If so, it means that this is the peak period for hot water use, and determine whether the current liquid level of the insulated water tank is less than or equal to the second liquid level threshold. If so, the hot water inventory is small at this time, triggering the direct heating hot water unit to start the direct heating working mode and supply a large amount of hot water.

[0077] It is worth noting that in some embodiments, it also includes: within the second preset time period, if the current liquid level of the insulated water tank is greater than the fourth liquid level threshold, the direct heating hot water unit is triggered to shut down the direct heating working mode; the fourth liquid level threshold is greater than the second liquid level threshold.

[0078] For example, after the direct heating water heater starts the direct heating working mode, when the current liquid level of the insulated water tank is greater than or equal to the fourth liquid level threshold, the hot water supply is guaranteed, triggering the direct heating water heater to turn off the direct heating working mode.

[0079] It is understood that, using the technical solution provided by the embodiments of the present invention, the solar thermal collector heats the water in the insulated water tank using solar energy; the controller controls the opening and closing of different operating modes of the direct-heating water heater based on the current liquid level of the insulated water tank, thereby enabling joint control of the direct-heating water heater and the solar thermal collector. Therefore, the technical solution provided by this application utilizes the current liquid level of the insulated water tank to reflect the user's water demand, thereby determining the operating mode of the direct-heating water heater based on the user's water demand. This rationally combines the solar thermal collector and the air source heat pump to ensure hot water capacity while reducing hot water energy consumption.

[0080] It is worth noting that, in some embodiments, the control method further includes:

[0081] Obtaining the temperature of the insulated water tank in the insulated water tank and the temperature of the solar water heater in the solar water heater; calculating the temperature difference between the temperature of the solar water heater and the temperature of the insulated water tank;

[0082] When the temperature difference is greater than or equal to the first temperature threshold, and the temperature of the solar water collector is less than the second temperature threshold, the first circulation pump is triggered to start;

[0083] When the temperature difference is less than the third temperature threshold, or the temperature of the insulated water tank is greater than or equal to the second temperature threshold, the first circulation pump is triggered to shut down; the third temperature threshold is less than the first temperature threshold.

[0084] In an embodiment of the present invention, the temperature requirement of the thermal insulation water tank can be set to 46°C, the temperature of the solar collector is detected by the first temperature detection component, and the temperature of the thermal insulation water tank is detected by the second temperature detection component. Both the first temperature detection component and the second temperature detection component can be configured as temperature sensors.

[0085] After obtaining the temperature of the solar collector and the temperature of the insulated water tank, calculate the temperature difference of the solar collector temperature minus the insulated water tank temperature. Set the temperature threshold according to the application requirements. For example, the first temperature threshold can be set to 4°C, the second temperature threshold can be set to 55°C, and the third temperature threshold can be set to 1°C. The present application can achieve efficient utilization of the heat of the solar water collector through temperature difference control. When it is detected that the temperature difference is greater than or equal to the first temperature threshold, and the temperature of the solar water collector is less than the second temperature threshold, it means that there is a temperature difference between the solar water collector and the insulated water tank. The first circulation pump can be turned on to introduce hot water. In order to ensure that the hot water temperature is not too high, the temperature of the solar water collector is set to be less than the second temperature threshold. When it is detected that the temperature difference is less than the third temperature threshold, it means that the temperature difference is reduced and is not enough to achieve the injection of hot water, then the first circulation pump is turned off; or, when the temperature of the insulated water tank is greater than or equal to the second temperature threshold, in order to ensure water safety, the first circulation pump is triggered to shut down.

[0086] It is worth noting that, in some embodiments, the control method further includes: when the temperature of the solar water heater is less than or equal to the first temperature threshold, and the temperature of the thermal insulation water tank is greater than or equal to the fourth temperature threshold, triggering the first circulation pump to start;

[0087] When the temperature of the solar water heater is greater than or equal to the fifth temperature threshold, or the temperature of the insulated water tank is lower than the temperature of the solar water heater, the first circulation pump is triggered to shut down; the fifth temperature threshold is greater than the first temperature threshold.

[0088] It is understood that in embodiments of the present invention, antifreeze circulation control can be implemented based on the temperature of the solar water heater. The fourth temperature threshold can be set to 15°C, and the fifth temperature threshold can be set to 8°C. When the solar water heater temperature is less than or equal to the first temperature threshold, and the insulated water tank temperature is greater than the fourth temperature threshold, the first circulation pump can be turned on for antifreeze circulation. When the solar water heater temperature is greater than or equal to the fifth temperature threshold, or the insulated water tank temperature is less than the solar water heater temperature, the first circulation pump can be turned off.

[0089] It is worth noting that, in some embodiments, the control method further includes: when the temperature of the thermal insulation water tank is less than or equal to a sixth temperature threshold, triggering the second circulation pump to start;

[0090] When the temperature of the insulated water tank is greater than or equal to the seventh temperature threshold, the second circulation pump is triggered to shut down;

[0091] The seventh temperature threshold is greater than the sixth temperature threshold.

[0092] In this embodiment of the present invention, the sixth temperature threshold can be set to 42°C, and the seventh temperature threshold can be set to 46°C. When the temperature of the insulated water tank is less than or equal to the sixth temperature threshold, the second circulation pump is triggered to turn on, causing the direct-heating water heater to enter the circulation heating mode. When the temperature of the insulated water tank is greater than or equal to the seventh temperature threshold, the second circulation pump is triggered to turn off, causing the direct-heating water heater to exit the circulation heating mode.

[0093] It is understandable that by adopting the technical solution provided in the embodiment of the present invention, effective circulation control of the direct-heating water heater unit can be achieved through analysis of the temperature of the insulated water tank.

[0094] It is worth noting that, in some embodiments, the control method further includes: when the temperature of the thermal insulation water tank is greater than or equal to an eighth temperature threshold, and the current liquid level of the thermal insulation water tank is less than or equal to a fourth liquid level threshold, triggering the water supply solenoid valve to open;

[0095] When the temperature of the thermal insulation water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the thermal insulation water tank is greater than the fourth liquid level threshold, the water supply solenoid valve is triggered to close;

[0096] The ninth temperature threshold is lower than the eighth temperature threshold.

[0097] For example, in this application, the eighth temperature threshold can be set to 47°C and the ninth temperature threshold can be set to 43°C, so as to control the water replenishment of the insulated water tank according to the temperature and current liquid level of the insulated water tank. When the temperature of the insulated water tank is greater than or equal to the eighth temperature threshold, and the current liquid level of the insulated water tank is less than or equal to the fourth liquid level threshold, it means that the water temperature is high and there is a need for water replenishment, which triggers the water replenishment solenoid valve to open and replenish water; when the temperature of the insulated water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the insulated water tank is greater than the fourth liquid level threshold, the water replenishment solenoid valve is triggered to close.

[0098] It can be understood that by adopting the technical solution provided in the embodiment of the present invention, the water replenishment of the water tank can be controlled by analyzing the temperature and liquid level of the insulated water tank, and the solar water collector and the air source heat pump can be reasonably combined to reduce the hot water energy consumption while ensuring the hot water capacity.

[0099] Example 3:

[0100] Based on a general inventive concept, an embodiment of the present invention further provides a control device for a hot water system.

[0101] Figure 3 FIG1 is a schematic structural diagram of a control device for a hot water system according to an exemplary embodiment, which is applied to the hot water system described in any of the above embodiments. Referring to FIG1 , the device provided in this embodiment may include:

[0102] The first trigger module 301 is configured to trigger the direct heating water heater to start the direct heating operation mode if the current liquid level of the insulated water tank is less than or equal to a first liquid level threshold within a first preset time period;

[0103] The second trigger module 302 is used to trigger the direct heating water heater to start the direct heating working mode if the current liquid level of the insulated water tank is less than or equal to the second liquid level threshold within the second preset time period; the first liquid level threshold is less than the second liquid level threshold.

[0104] Optionally, the first trigger module is further configured to trigger the direct heating type water heater unit to shut down the direct heating mode if the current liquid level of the insulated water tank is greater than a third liquid level threshold within a first preset time period; the third liquid level threshold is greater than the first liquid level threshold;

[0105] The second trigger module is also used to trigger the direct heating water heater to shut down the direct heating working mode if the current liquid level of the insulated water tank is greater than the fourth liquid level threshold within the second preset time period; the fourth liquid level threshold is greater than the second liquid level threshold.

[0106] Optionally, it also includes: an acquisition module for acquiring the insulated water tank temperature in the insulated water tank and the solar water heater temperature in the solar water heater; a calculation module for calculating the temperature difference between the solar water heater temperature and the insulated water tank temperature; a first trigger module for triggering the first circulation pump to turn on when the temperature difference is greater than or equal to the first temperature threshold and the solar water heater temperature is less than the second temperature threshold; a second trigger module for triggering the first circulation pump to turn off when the temperature difference is less than a third temperature threshold, or the insulated water tank temperature is greater than or equal to the second temperature threshold; the third temperature threshold is less than the first temperature threshold.

[0107] Optionally, the first trigger module is further configured to trigger the first circulation pump to start when the temperature of the solar water collector is less than or equal to the first temperature threshold, and the temperature of the thermal insulation water tank is greater than or equal to a fourth temperature threshold;

[0108] The second trigger module is also used to trigger the first circulation pump to shut down when the temperature of the solar water heater is greater than or equal to the fifth temperature threshold, or the temperature of the insulated water tank is lower than the temperature of the solar water heater; the fifth temperature threshold is greater than the first temperature threshold.

[0109] Optionally, the first trigger module is also used to trigger the second circulation pump to turn on when the temperature of the insulated water tank is less than or equal to the sixth temperature threshold; the second trigger module is also used to trigger the second circulation pump to turn off when the temperature of the insulated water tank is greater than or equal to the seventh temperature threshold; the seventh temperature threshold is greater than the sixth temperature threshold.

[0110] Optionally, the first trigger module is also used to trigger the water supply solenoid valve to open when the temperature of the insulated water tank is greater than or equal to the eighth temperature threshold and the current liquid level of the insulated water tank is less than or equal to the fourth liquid level threshold; the second trigger module is also used to trigger the water supply solenoid valve to close when the temperature of the insulated water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the insulated water tank is greater than the fourth liquid level threshold; the ninth temperature threshold is less than the eighth temperature threshold.

[0111] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0112] Example 4:

[0113] Based on a general inventive concept, an embodiment of the present invention further provides a control device for a hot water system.

[0114] The present invention also provides a control device for a hot water system, which is used to implement the above method embodiment. Figure 4 FIG. 1 is a schematic diagram showing a structure of a control device for a hot water system according to an exemplary embodiment. Figure 4 As shown, the control device of the hot water system of this embodiment includes a processor 41 and a memory 42, and the processor 41 is connected to the memory 42. The processor 41 is used to call and execute the program stored in the memory 42; the memory 42 is used to store the program, and the program is used to at least execute the control method of the hot water system in the above embodiment.

[0115] The specific implementation scheme of the control device of the hot water system provided in the embodiment of the present application can refer to the implementation scheme of the control method of the hot water system in any of the above embodiments, and will not be repeated here.

[0116] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0117] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is at least two.

[0118] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0119] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0120] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0121] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0122] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0123] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0124] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for controlling a hot water system, characterized in that: Applicable to a hot water system, the hot water system comprises: an insulated water tank, a solar thermal collector, a direct-heating water heater unit, and a controller; the first end of the solar thermal collector and the second end of the solar thermal collector are respectively connected to the first end and the second end of the insulated water tank; the first end of the direct-heating water heater unit and the second end of the direct-heating water heater unit are respectively connected to the third end and the fourth end of the insulated water tank; A first circulation pump is provided on the connecting pipe between the solar collector and the thermal insulation water tank; a second circulation pump is provided on the connecting pipe between the direct heating water heater unit and the thermal insulation water tank; The third end of the direct heating water heater is connected to cold water; a liquid level detection component is provided in the thermal insulation water tank; The controller is respectively connected to the first circulation pump, the second circulation pump, the liquid level detection component and the direct heating type water heater; the controller controls the opening and closing of different working modes of the direct heating type water heater according to the current liquid level of the insulated water tank detected by the liquid level detection component; The method comprises: Within a first preset time period, if the current liquid level of the thermal insulation water tank is less than or equal to a first liquid level threshold, the direct heating water heater is triggered to start a direct heating working mode; Within a second preset time period, if the current liquid level of the insulated water tank is less than or equal to a second liquid level threshold, the direct heating water heater is triggered to start the direct heating working mode; the first liquid level threshold is less than the second liquid level threshold; Also includes: Within a first preset time period, if the current liquid level of the thermal insulation water tank is greater than a third liquid level threshold, the direct heating water heater is triggered to shut down the direct heating working mode; the third liquid level threshold is greater than the first liquid level threshold; Within a second preset time period, if the current liquid level of the insulated water tank is greater than a fourth liquid level threshold, the direct heating water heater is triggered to shut down the direct heating working mode; the fourth liquid level threshold is greater than the second liquid level threshold; The control method further includes: Obtaining the temperature of the insulating water tank in the insulating water tank and the temperature of the solar collector in the solar collector; calculating the temperature difference between the solar collector temperature and the insulating water tank temperature; When the temperature difference is greater than or equal to a first temperature threshold and the temperature of the solar collector is less than a second temperature threshold, triggering the first circulation pump to start; When the temperature difference is less than a third temperature threshold, or the temperature of the thermal insulation water tank is greater than or equal to the second temperature threshold, the first circulation pump is triggered to shut down; the third temperature threshold is less than the first temperature threshold; Also includes: When the temperature of the thermal insulation water tank is greater than or equal to the eighth temperature threshold, and the current liquid level of the thermal insulation water tank is less than or equal to the fourth liquid level threshold, the water supply solenoid valve is triggered to open; When the temperature of the thermal insulation water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the thermal insulation water tank is greater than the fourth liquid level threshold, the water supply solenoid valve is triggered to close; The ninth temperature threshold is lower than the eighth temperature threshold.

2. The method according to claim 1, characterized in that Also includes: When the temperature of the solar collector is less than or equal to a first temperature threshold, and the temperature of the thermal insulation water tank is greater than or equal to a fourth temperature threshold, triggering the first circulation pump to start; When the temperature of the solar collector is greater than or equal to a fifth temperature threshold, or the temperature of the thermal insulation water tank is lower than the temperature of the solar collector, the first circulation pump is triggered to shut down; the fifth temperature threshold is greater than the first temperature threshold.

3. The method according to claim 1, characterized in that Also includes: When the temperature of the insulated water tank is less than or equal to a sixth temperature threshold, the second circulation pump is triggered to start; When the temperature of the insulated water tank is greater than or equal to a seventh temperature threshold, the second circulation pump is triggered to shut down; The seventh temperature threshold is greater than the sixth temperature threshold.

4. The method according to claim 1, wherein A first temperature detection component is provided in the solar thermal collector, and a second temperature detection component is provided in the thermal insulation water tank; the first temperature detection component and the second temperature detection component are both connected to the controller; The first temperature detection component is used to detect the temperature of the solar collector in the solar collector; the second temperature detection component is used to detect the temperature of the thermal insulation water tank in the thermal insulation water tank; The controller is used to control the switch of the first circulation pump according to the temperature of the solar collector and the temperature of the thermal insulation water tank.

5. The method according to claim 4, characterized in that The fourth end of the thermal insulation water tank is connected to cold water through a water supply solenoid valve; The water replenishment solenoid valve is connected to the controller, and the controller is used to control the opening and closing of the water replenishment solenoid valve according to the temperature of the thermal insulation water tank and / or the current liquid level of the thermal insulation water tank.

6. A control device for a hot water system, characterized in that: The control method for a hot water system according to any one of claims 1 to 5, wherein the device comprises: a first triggering module, configured to trigger the direct heating water heater to start a direct heating operation mode if the current liquid level of the thermal insulation water tank is less than or equal to a first liquid level threshold within a first preset time period; a second triggering module, configured to trigger the direct heating type water heater unit to start a direct heating operation mode if the current liquid level of the insulated water tank is less than or equal to a second liquid level threshold value within a second preset time period; the first liquid level threshold value is less than the second liquid level threshold value; and further configured to trigger the direct heating type water heater unit to turn off the direct heating operation mode if the current liquid level of the insulated water tank is greater than a third liquid level threshold value within the first preset time period; the third liquid level threshold value is greater than the first liquid level threshold value; Within a second preset time period, if the current liquid level of the insulated water tank is greater than a fourth liquid level threshold, the direct heating water heater is triggered to shut down the direct heating working mode; the fourth liquid level threshold is greater than the second liquid level threshold; Also used for: Obtaining the temperature of the insulating water tank in the insulating water tank and the temperature of the solar collector in the solar collector; calculating the temperature difference between the solar collector temperature and the insulating water tank temperature; When the temperature difference is greater than or equal to a first temperature threshold, and the temperature of the solar collector is less than a second temperature threshold, triggering the first circulation pump to start; When the temperature difference is less than a third temperature threshold, or the temperature of the thermal insulation water tank is greater than or equal to the second temperature threshold, the first circulation pump is triggered to shut down; the third temperature threshold is less than the first temperature threshold; Also used for: When the temperature of the thermal insulation water tank is greater than or equal to the eighth temperature threshold, and the current liquid level of the thermal insulation water tank is less than or equal to the fourth liquid level threshold, the water supply solenoid valve is triggered to open; When the temperature of the thermal insulation water tank is less than or equal to the ninth temperature threshold, or the current liquid level of the thermal insulation water tank is greater than the fourth liquid level threshold, the water supply solenoid valve is triggered to close; The ninth temperature threshold is lower than the eighth temperature threshold.

7. A control device for a hot water system, characterized in that: The device comprises a processor and a memory, wherein the processor is connected to the memory: The processor is configured to call and execute the program stored in the memory; The memory is used to store the program, and the program is used at least to execute the control method of the hot water system according to any one of claims 1 to 5.

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