Water temperature control method and device based on hot water system

Abstract

The invention relates to a water temperature control method and device based on a hot water system, and the method comprises the steps: determining the solar radiation intensity of the current environment of the hot water system; based on the intensity range in which the solar radiation intensity falls, a heating strategy for heating a first water tank and a second water tank in the hot water system is determined, and the heating strategy refers to whether a heating source for heating the first water tank and the second water tank is solar energy or a heat pump unit in the hot water system; a heating strategy is executed, so that the solar energy and the heat pump unit cooperatively operate to heat the first water tank and the second water tank, and after heating is completed, a heat preservation strategy for heat preservation of the second water tank is executed based on the heating strategy, and the first water tank is closer to a solar heat collection pipe than the second water tank in the hot water system; the solar heat collecting pipe heats water through solar energy. By means of the water heating system, the problem that the solar energy resource utilization rate is low due to the fact that a hot water system in the prior art adopts the fixed outlet water temperature is solved.

Description

Technical Field

[0001] This application relates to the field of water temperature control, and in particular to a water temperature control method and device based on a hot water system. Background Technology

[0002] In hot water systems, the energy consumption of the heating unit accounts for approximately 80% of the total system energy consumption. Existing hot water systems often employ a parallel connection of solar energy and hot water units to reduce system energy consumption. Studies have shown that when solar radiation intensity is constant, the heat collection efficiency of solar collectors decreases significantly as the outlet water temperature increases, leading to a reduction in the amount of heat collected per unit time. However, the fixed outlet water temperature setting in existing technologies cannot adapt to dynamic changes in radiation intensity. During periods of low radiation, efficiency is low, requiring additional energy consumption from the unit, resulting in low utilization of solar energy resources and increased operating costs. Summary of the Invention

[0003] This application provides a water temperature control method and device based on a hot water system to solve the problem that the use of a fixed outlet water temperature in existing hot water systems leads to low utilization of solar energy resources.

[0004] In a first aspect, this application provides a water temperature control method based on a hot water system, comprising: determining the solar radiation intensity of the current environment in which the hot water system is located; determining a heating strategy for heating a first water tank and a second water tank in the hot water system based on the intensity range in which the solar radiation intensity falls, wherein the heating strategy refers to whether the heating source for heating the first water tank and the second water tank is solar energy or a heat pump unit in the hot water system; executing the heating strategy to enable the solar energy and the heat pump unit to work together to heat the first water tank and the second water tank, and executing a heat preservation strategy for heat preservation of the second water tank based on the heating strategy after heating is completed, wherein the first water tank is closer to the solar collector tube in the hot water system than the second water tank, and the solar collector tube uses solar energy to heat the water.

[0005] Optionally, based on the intensity range within which the solar radiation intensity falls, a heating strategy for heating the first and second water tanks in the hot water system is determined, including: when the solar radiation intensity is greater than a first preset threshold, determining the heating strategy as a first heating strategy, wherein the first heating strategy indicates heating the first and second water tanks using solar energy; when the solar radiation intensity is greater than a second preset threshold and less than the first preset threshold, determining the heating strategy as a second heating strategy, wherein the second heating strategy indicates heating the first water tank multiple times using solar energy and heating the second water tank multiple times using a heat pump unit; when the solar radiation intensity is greater than a third preset threshold and less than the second preset threshold, determining the heating strategy as a third heating strategy, wherein the third heating strategy indicates heating the first water tank multiple times using solar energy and a heat pump unit, and heating the second water tank multiple times using the heat pump unit; when the solar radiation intensity is less than the third preset threshold, determining the heating strategy as a fourth heating strategy, wherein the fourth heating strategy indicates heating the first and second water tanks using the heat pump unit.

[0006] Optionally, the first heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank. After heating is completed, a heat preservation strategy is executed based on the heating strategy to keep the second water tank warm. This includes: controlling the water supply three-way valve in the hot water system to supply water to the solar collector to full level; heating the water in the solar collector to a first preset temperature based on the solar energy, and then transporting the heated water to the second water tank for storage; supplying water to the solar collector again, heating it to the second preset temperature, and then transporting it to the first water tank for storage; when the water temperature in the second water tank is lower than the third preset temperature and the water temperature in the first water tank is higher than the first preset temperature, controlling the water in the first water tank to flow into the second water tank to keep the second water tank warm; wherein the third preset temperature is lower than the first preset temperature, and the first preset temperature is lower than the second preset temperature.

[0007] Optionally, the second heating strategy is implemented to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank. After heating is completed, a heat preservation strategy is implemented based on the heating strategy to keep the second water tank warm. This includes: controlling the heat pump unit to heat the water in the first water tank to a fourth preset temperature, and then using the solar energy to heat the water in the first water tank to a fifth preset temperature; transferring the water in the first water tank to the second water tank, and refilling the first water tank; controlling the heat pump unit to heat the water in the first water tank to the fourth preset temperature, and then using the solar energy to heat the water in the first water tank to a sixth preset temperature; when the water temperature in the second water tank is lower than a seventh preset temperature and the water temperature in the first water tank is higher than the fifth preset temperature, controlling the water in the first water tank to flow into the second water tank to keep the second water tank warm; wherein the sixth preset temperature is greater than the fifth preset temperature, the fifth preset temperature is greater than the fourth preset temperature, and the seventh preset temperature is less than the fifth preset temperature.

[0008] Optionally, the third heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank. After heating is completed, a heat preservation strategy is executed based on the heating strategy to keep the second water tank warm. This includes: heating the water in the solar collector to an eighth preset temperature based on solar energy and storing it in the first water tank, and then transferring the heated water in the first water tank to the second water tank; controlling the heat pump unit to heat the water in the second water tank to a ninth preset temperature; reheating the water in the solar collector to the eighth preset temperature based on solar energy and storing it in the first water tank, and then controlling the heat pump unit to heat the water in the first water tank to the ninth preset temperature; if the water temperature in either water tank is lower than a tenth preset temperature, controlling the heat pump unit to keep the water tank warm; wherein the eighth preset temperature is lower than the ninth preset temperature, and the tenth preset temperature is lower than the ninth preset temperature.

[0009] Optionally, the fourth heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank, and after heating is completed, a heat preservation strategy is executed based on the heating strategy to keep the second water tank warm, including: controlling the heat pump unit to heat the water in the first water tank and the second water tank to an eleventh preset temperature respectively; if the water temperature in either water tank is lower than a twelfth preset temperature, controlling the heat pump unit to keep the water tank warm and heated; wherein, the eleventh preset temperature is greater than the twelfth preset temperature.

[0010] Optionally, the method includes: comparing the water temperatures in the first water tank and the second water tank, and selecting the water tank with the higher water temperature to supply water to the user through the water supply three-way valve in the hot water system.

[0011] Secondly, this application provides a water temperature control device based on a hot water system, comprising: a first determining module for determining the solar radiation intensity of the current environment of the hot water system; a second determining module for determining a heating strategy for heating a first water tank and a second water tank in the hot water system based on the intensity range of the solar radiation intensity, wherein the heating strategy refers to whether the heating source for heating the first water tank and the second water tank is solar energy or a heat pump unit in the hot water system; and a first processing module for executing the heating strategy to enable the solar energy and the heat pump unit to work together to heat the first water tank and the second water tank, and, after heating is completed, executing a heat preservation strategy for heat preservation of the second water tank based on the heating strategy, wherein the first water tank is closer to the solar collector tube in the hot water system than the second water tank, and the solar collector tube uses solar energy to heat the water.

[0012] Thirdly, this application provides an electronic device, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute the water temperature control method based on a hot water system as described in any of the preceding claims of this application.

[0013] Fourthly, this application also provides a computer storage medium storing computer-executable instructions for executing the water temperature control method based on a hot water system as described in any of the preceding claims of this application.

[0014] Compared with the prior art, the above-mentioned technical solution provided in this application embodiment has the following advantages: The method provided in this application embodiment first determines the solar radiation intensity of the current environment of the hot water system, then determines the heating strategy for heating the first water tank and the second water tank in the hot water system based on the intensity range of the solar radiation intensity, then executes the heating strategy so that the solar energy and the heat pump unit work together to heat the first water tank and the second water tank, and after the heating is completed, executes the heat preservation strategy for the second water tank based on the heating strategy. As can be seen, in this embodiment, the strategy of co-heating by solar energy and heat pump units is selected based on the current solar radiation intensity. That is, the greater the solar radiation intensity, the more times and the more water tanks are heated by solar energy, which can make full use of the sun and thus save energy consumption of the hot water system. Moreover, in this application, a corresponding heat preservation strategy can be executed according to the heating strategy. That is, if the current solar radiation intensity is high, the first water tank can be heated by solar energy, and then the water in the first water tank and the second water tank can be exchanged to achieve the purpose of heat preservation. If the current solar radiation intensity is low, the heat pump unit will be used to preserve the second water tank. It can be seen that solar energy is also fully utilized in the heat preservation stage, further saving energy consumption, thereby solving the problem of low utilization rate of solar energy resources caused by the use of fixed outlet water temperature in the hot water system of the prior art. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 A flowchart illustrating a water temperature control method based on a hot water system, provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a hot water system provided in an embodiment of this application; Figure 3 A flowchart of a control method based on a hot water system provided in an embodiment of this application; Figure 4A schematic diagram of the structure of a water temperature control device based on a hot water system provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0020] To address the problem of low solar energy utilization caused by the use of fixed outlet water temperature in existing hot water systems, this application provides a water temperature control method based on a hot water system, such as... Figure 1 As shown, the steps of this method include: Step 101: Determine the solar radiation intensity of the current environment in which the hot water system is located; like Figure 2 As shown, the hot water system in this embodiment includes water tank 1 (first water tank) and water tank 2 (second water tank), T1~T4 are temperature sensors, F1~F8 are three-way valves, B-1~B-4 are pumps, A is a heat pump unit, and C is a solar collector. It should be noted that B-3 and B-4 are pump sets, each consisting of two pumps of the same specifications. In actual operation, only one pump will be activated, with the other serving as a backup pump to prevent system malfunction if the operating pump fails. B-1 and B-2 are two pumps of different specifications, used for different functions. The two pumps can serve as backups for each other; if one pump fails, the other can still replace it, ensuring normal system operation.

[0021] Step 102: Based on the intensity range of solar radiation intensity, determine the heating strategy for heating the first and second water tanks in the hot water system. The heating strategy refers to whether the heating source for heating the first and second water tanks is solar energy or a heat pump unit in the hot water system. In a specific example of this application's embodiment, the intensity range of solar radiation can be less than 100 W / m², 100 W / m² to 300 W / m², 300 W / m² to 500 W / m², and greater than 500 W / m². The above intensity range is merely illustrative; in other application scenarios, appropriate settings can be made according to actual needs.

[0022] Step 103: Execute a heating strategy to enable the solar energy and heat pump unit to work together to heat the first and second water tanks. After heating is completed, execute a heat preservation strategy to keep the second water tank warm based on the heating strategy. The first water tank is closer to the solar collector tube in the hot water system than the second water tank. The solar collector tube uses solar energy to heat the water.

[0023] In this embodiment, the greater the solar radiation intensity, the more times and the more water tanks can be heated by solar energy. For example, if the current solar radiation intensity is greater than 500W / m², only solar energy can heat the water in the first and second water tanks. If the solar radiation intensity is between 100W / m² and 300W / m², or between 300W / m² and 500W / m², solar energy and the heat pump unit of the hot water system can be used for heating in combination. If the current solar radiation intensity is low, below 100W / m², only the heat pump unit can be used for heating to ensure heating efficiency. Furthermore, in this embodiment, if the current solar radiation intensity is high, the first water tank can be heated by solar energy, and then the water in the first and second water tanks can be exchanged to achieve heat preservation. If the current solar radiation intensity is low, the heat pump unit will be used to preserve the temperature of the second water tank.

[0024] Through steps 101 to 103 of this application, the solar radiation intensity of the current environment of the hot water system is first determined. Then, based on the intensity range of the solar radiation intensity, a heating strategy for heating the first and second water tanks in the hot water system is determined. The heating strategy is then executed so that the solar energy and the heat pump unit work together to heat the first and second water tanks. After the heating is completed, a heat preservation strategy for heat preservation of the second water tank is executed based on the heating strategy. As can be seen, in this embodiment, the strategy of co-heating by solar energy and heat pump units is selected based on the current solar radiation intensity. That is, the greater the solar radiation intensity, the more times and the more water tanks are heated by solar energy, which can make full use of the sun and thus save energy consumption of the hot water system. Moreover, in this application, a corresponding heat preservation strategy can be executed according to the heating strategy. That is, if the current solar radiation intensity is high, the first water tank can be heated by solar energy, and then the water in the first water tank and the second water tank can be exchanged to achieve the purpose of heat preservation. If the current solar radiation intensity is low, the heat pump unit will be used to preserve the second water tank. It can be seen that solar energy is also fully utilized in the heat preservation stage, further saving energy consumption, thereby solving the problem of low utilization rate of solar energy resources caused by the use of fixed outlet water temperature in the hot water system of the prior art.

[0025] In this embodiment of the application, the method of determining the heating strategy for heating the first and second water tanks in the hot water system based on the intensity range of solar radiation intensity involved in step 102 above may further include: Step 11: When the solar radiation intensity is greater than the first preset threshold, the heating strategy is determined to be the first heating strategy, wherein the first heating strategy is used to indicate that the first water tank and the second water tank are heated by solar energy. Step 12: When the solar radiation intensity is greater than the second preset threshold and less than the first preset threshold, the heating strategy is determined to be the second heating strategy. The second heating strategy is used to indicate that the first water tank is heated by solar energy and the second water tank is heated by heat pump unit multiple times. Step 13: When the solar radiation intensity is greater than the third preset threshold and less than the second preset threshold, the heating strategy is determined to be the third heating strategy. The third heating strategy is used to indicate that the first water tank is heated multiple times by solar energy and heat pump unit, and the second water tank is heated by heat pump unit. Step 14: When the solar radiation intensity is less than the third preset threshold, the heating strategy is determined to be the fourth heating strategy, wherein the fourth heating strategy is used to indicate that the first water tank and the second water tank are heated by the heat pump unit.

[0026] As can be seen from steps 11 to 14 above, the greater the solar radiation intensity, the more times and the more tanks can be heated by solar energy. Therefore, the first heating strategy indicates that the solar radiation intensity is at its maximum, at which point the first and second water tanks can be directly heated by solar energy. The second and third heating strategies require the solar energy and heat pump unit to work together for heating. Finally, the fourth heating strategy involves only the heat pump unit heating the water tanks. In other words, in this embodiment, corresponding heating strategies are executed according to different ranges of solar radiation intensity to achieve coordinated operation of solar energy and the heat pump unit, fully utilizing solar energy to save energy consumption.

[0027] In an optional embodiment of this application, the method of executing a first heating strategy in step 103 above, so that the solar energy and heat pump unit work together to heat the first water tank and the second water tank, and then executing a heat preservation strategy to keep the second water tank warm based on the heating strategy after the heating is completed, may include: Step 21: Control the water supply three-way valve in the hot water system to supply water to the solar collector until it reaches full level; Step 22: Heat the water in the solar collector to a first preset temperature based on solar energy, and then transfer the heated water to a second water tank for storage. Step 23: Add water to the solar collector again, heat it to the second preset temperature, and then transfer it to the first water tank for storage; Step 24: When the water temperature in the second water tank is lower than the third preset temperature and the water temperature in the first water tank is higher than the first preset temperature, control the water in the first water tank to flow into the second water tank to keep the second water tank warm; wherein, the third preset temperature is lower than the first preset temperature and the first preset temperature is lower than the second preset temperature.

[0028] As can be seen, in this embodiment, if the solar radiation intensity exceeds a certain threshold, the water can be directly heated by the solar collector and then transported to the first and second water tanks. Since the first water tank is closer to the solar collector, even after the water temperature in the first tank drops, it can still be heated by the solar collector before being transported to the first water tank to maintain its temperature. Meanwhile, the first water tank can also be used to maintain the temperature of the water in the second water tank. Therefore, this method fully utilizes solar energy for heating, significantly saving energy consumption in the hot water system.

[0029] In an optional embodiment of this application, the method of executing a second heating strategy in step 103 above, so that the solar energy and heat pump unit work together to heat the first water tank and the second water tank, and then executing a heat preservation strategy to keep the second water tank warm based on the heating strategy after the heating is completed, may further include: Step 31: First, control the heat pump unit to heat the water in the first water tank to the fourth preset temperature, and then use solar energy to heat the water in the first water tank to the fifth preset temperature. Step 32: Transfer the water in the first water tank to the second water tank, refill the first water tank, and control the heat pump unit to heat the water in the first water tank to the fourth preset temperature. Then, the solar energy heats the water in the first water tank to the sixth preset temperature. Step 33: When the water temperature in the second water tank is lower than the seventh preset temperature and the water temperature in the first water tank is higher than the fifth preset temperature, control the water in the first water tank to flow into the second water tank to keep the second water tank warm. Wherein, the sixth preset temperature is greater than the fifth preset temperature, the fifth preset temperature is greater than the fourth preset temperature, and the seventh preset temperature is less than the fifth preset temperature. As can be seen from steps 31 to 33 above, when the solar radiation intensity is neither too high nor too low, the heat pump unit first heats the water in the first water tank, and then the solar energy heats the water in the first water tank a second time. After heating to a certain temperature, the water in the first water tank is transferred to the second water tank. Then, the first water tank is filled again, and the water temperature is heated to the target temperature through the coordinated control of the heat pump unit and the solar energy. Therefore, in this embodiment, if the solar radiation intensity is neither too high nor too low, one water tank can be heated by the combined action of the solar energy and the heat pump unit, and then the heated water can be transferred to the other water tank. The above process is then repeated to heat the first water tank again. In this process, the water temperature in the first water tank is ensured to reach the required level before the water temperature in the second water tank is met. Therefore, the solar radiation is relatively high at this time, and the heating is faster. This method not only ensures the heating temperature of the water in the first and second water tanks but also ensures heating efficiency and saves energy.

[0030] In an optional embodiment of this application, the method of executing a third heating strategy in step 103 above, so that the solar energy and heat pump unit work together to heat the first water tank and the second water tank, and then executing a heat preservation strategy to keep the second water tank warm based on the heating strategy after the heating is completed, may further include: Step 41: Heat the water in the solar collector to the eighth preset temperature based on solar energy and store it in the first water tank, and then transfer the heated water in the first water tank to the second water tank. Step 42: Control the heat pump unit to heat the water in the second water tank to the ninth preset temperature; Step 43: Reheat the water in the solar collector to the eighth preset temperature based on solar energy and store it in the first water tank. Then control the heat pump unit to heat the water in the first water tank to the ninth preset temperature. Step 44: If the water temperature in any water tank is lower than the tenth preset temperature, control the heat pump unit to heat and insulate the water tank; wherein the eighth preset temperature is lower than the ninth preset temperature, and the tenth preset temperature is lower than the ninth preset temperature.

[0031] As can be seen from steps 41 to 43 above, if the solar radiation intensity is further reduced compared to steps 31 to 33 above, the water in the solar collector can be heated first by solar energy, because the solar radiation is relatively low at this time. The heated water is then transferred to the second water tank, where the heat pump unit heats the water. Next, the water in the solar collector is heated again by solar energy to the eighth preset temperature and stored in the first water tank. Then, the heat pump unit is controlled to heat the water in the first water tank to the ninth preset temperature. It is evident that the water temperature in the second water tank is prioritized throughout the process. Because the solar radiation is relatively low at this time, the heating efficiency of the first water tank by solar energy will be slower. Therefore, after the water in the first water tank is heated to a certain temperature by solar energy, it is transferred to the second water tank for heating by the heat pump unit, thus ensuring the water temperature in the second water tank. After this, the first water tank is heated by the coordinated control of solar energy and the heat pump unit.

[0032] In an optional embodiment of this application, the method of executing the fourth heating strategy in step 103 above, so that the solar energy and heat pump unit work together to heat the first water tank and the second water tank, and then executing a heat preservation strategy to keep the second water tank warm based on the heating strategy after the heating is completed, may further include: Step 51: Control the heat pump unit to heat the water in the first water tank and the second water tank to the eleventh preset temperature respectively; Step 52: If the water temperature in any water tank is lower than the twelfth preset temperature, control the heat pump unit to heat and maintain the water temperature of that water tank; wherein the eleventh preset temperature is greater than the twelfth preset temperature.

[0033] As can be seen in this embodiment, if the current solar radiation intensity is low, the heat pump unit can directly heat the water to ensure the heating efficiency of the first and second water tanks.

[0034] The present application will now be explained and described through specific embodiments, which provide a control method for a high-efficiency multi-energy complementary air source heat pump water heating system, in conjunction with the above. Figure 2 It can be seen that this control method is as follows: Figure 3 Specifically, it may include the following stages: Real-time monitoring of solar radiation intensity When the solar radiation intensity value is greater than Ea, open the water replenishing valves F3-1 and F7-1 until the solar energy reaches the full liquid level (solar heat collecting tubes), heat it by solar energy to the set water temperature T0, open the pumps B-4 and B-1, store it in the water tank 2 through F1-1 until the water tank 2 reaches the full liquid level, then close the pump B-1 and the valve F1-1. At this time, the hot water with the water temperature of T0 is stored in the water tank 2; then open the valves F3-1 and F7-1 until the solar energy reaches the full liquid level. When the solar heated water temperature T4 reaches T0 + m, open the valve B-4 until the water tank 1 reaches the full liquid level, close the valves F3-1 and F7-1, and close the pump B-4. At this time, the hot water with the water temperature of T0 + m is stored in the water tank 1; when the water temperature of the water tank 2 is lower than T0 - n and the water temperature of the water tank 1 is higher than the set water temperature T0, open the pump B-1 and F1-1, and keep the water tank 2 warm with the hot water in the water tank 1 until the water temperature in the water tank 2 reaches the set temperature T0, completing the heat preservation process; when the water temperature of the water tank 2 is lower than T0 - n and the water temperature of the water tank 1 is lower than the set water temperature T0 °C, heat the water in the water tank 1 by solar energy again to T0 + m; When the solar radiation intensity value is less than Ea and greater than Eb, open the valve F3-2 until the water tank 2 reaches the full liquid level, open the water pump B-2, the heat pump unit, and the valve F1-2 until the water temperature T1 in the water tank 1 ≥ T0 - b, completing the first heating of the hot water. Then close the heat pump unit, open the water pump B-4, heat the water in the water tank 1 by solar energy to the set water temperature T0, close the pump B-4, open the water pump B-1 and the valve F1-1 until the water tank 2 reaches the full liquid level; open the valves F3-1 and F7-2 until the water tank 1 reaches the full liquid level, open the pump B-1, the heat pump unit, and the valve F1-2, heat the hot water in the water tank 1 by the heat pump unit to T0 - b, close the heat pump unit, open the water pump B-4 to heat the water in the water tank 1 until the water temperature reaches T0 + d’, close the water pump B-4, and complete the heating of the water temperature in the water tank 1; when the temperature T2 of the water tank 2 < T0 - n and the water temperature of the water tank 1 is higher than the set water temperature T0, open the pump B-1 and F1-1, and keep the water tank 2 warm with the hot water in the water tank 1 until the water temperature in the water tank 2 reaches the set temperature T0, completing the heat preservation process; when the water temperature of the water tank 2 is lower than T0 - n and the water temperature of the water tank 1 is lower than the set water temperature T0 °C, heat the water in the water tank 1 by solar energy again to T0 + d’; When the solar radiation intensity value is less than Eb and greater than Ec, open valves F3-1 and F7-1 until the solar energy liquid level is full. When the water temperature of solar heating T4≥Tc, open valve B-4 to store the TC warm water in water tank 1 until it reaches the full liquid level, then open pump B-1, the heat pump unit, and valve F1-1 to heat the water temperature in water tank 2 to the set temperature T0, and then close valve F1-1; then open valves F3-1 and F7-1 until the solar energy liquid level is full, heat it to TC by solar energy, then open valve B-4 to store it in water tank 1 until it reaches the full liquid level. At this time, the water temperature in water tank 1 reaches TC, open pump B-1, the heat pump unit, and valve F1-2 until the water temperature in water tank 1 reaches T0, and then close water pump B-1, the heat pump unit, and valve F1 to complete the heating of the hot water in water tank 1; when the temperature of water tank 2 T2<T0-n, start the heat pump unit, water pump B-2, and valve F1-1 until the water temperature in water tank 2 reaches T0 to complete the heat preservation of water tank 2. When the temperature of water tank 1 T1<T0-n, start the heat pump unit, water pump B-1, and F1-2 until the water temperature in water tank 1 reaches T0 to complete the heat preservation of water tank 2; When the solar radiation intensity value is less than Ec, open valve F3-2 until the liquid level of water tank 2 is full, open water pump B-2, the heat pump unit, and valve F1-1 until the water temperature in water tank 2 reaches the set temperature T0, and then switch the water replenishing valve to the open state of F3-1 and F7-2 until the liquid level of water tank 1 is full, open water pump B-1, the heat pump unit, and valve F1-2 until the water temperature in water tank 1 reaches T0 to complete the heating of water tank 1; when the temperature of water tank 2 T2<T0-n, start the heat pump unit, water pump B-2, and valve F1-1 until the water temperature in water tank 2 reaches T0 to complete the heat preservation of water tank 2. When the temperature of water tank 1 T1<T0-n, start the heat pump unit, water pump B-1, and F1-2 until the water temperature in water tank 1 reaches T0 to complete the heat preservation of water tank 2; When the user has a demand for hot water, the system first judges the water temperatures of water tank 1 and water tank 2. When the water temperature of water tank 1 T1≥the water temperature of water tank 2 T2, open valve F5-1 to supply water to the user, otherwise open valve F5-2 to supply water to the user.

[0035] It should be noted that the above explanation of the flow of the three-way valve is that if a 1 is added after the three-way valve, it indicates a horizontal flow direction. For example, F1-1 means that the F1 three-way valve is in a horizontal flow state at this time, and F1-2 means that the F1 three-way valve is in a vertical flow state at this time.

[0036] Furthermore, for the above Figure 3 the process in a specific example can be: When the solar radiation intensity exceeds Ea, open the water supply valves F3-1 and F7-1 until the solar water heater is full. The solar energy will heat the water to the set temperature of 50℃. Then, open pumps B-4 and B-1, and the water will be stored in water tank 2 via F1-1 until tank 2 is full. Afterward, close pump B-1 and valve F1-1. At this point, water tank 2 contains hot water at 50℃. Then, open valves F3-1 and F7-1 until the solar water heater is full. When the solar-heated water temperature T4 reaches 55℃, open valve B-4 until water tank 1 is full, then close... Close valves F3-1 and F7-1, and shut off pump B-4. At this time, water tank 1 stores hot water at a temperature of 55℃. When the water temperature in water tank 2 is lower than 45℃ and the water temperature in water tank 1 is higher than the set water temperature of 50℃, turn on pumps B-1 and F1-1 to heat the water in water tank 2 from the hot water in water tank 1 until the water temperature in water tank 2 reaches the set temperature of 50℃, thus completing the heat preservation process. When the water temperature in water tank 2 is lower than 45℃ and the water temperature in water tank 1 is lower than the set water temperature of 50℃, the water in water tank 1 is reheated to 55℃ by solar energy.

[0037] When the solar radiation intensity is less than Ea but greater than Eb, open valve F7-2 until water tank 1 is full, then turn on water pump B-2, the heat pump unit, and valve F1-2 until the water temperature T1 in water tank 1 reaches ≥30℃, completing the first heating of the hot water. Then turn off the heat pump unit, turn on water pump B-4, and use solar energy to heat the water in water tank 1 to the set temperature of 50℃. Turn off pump B-4, then turn on water pump B-1 and valve F1-1 until water tank 2 is full; then open valves F3-1 and F7-2 until water tank 1 is full, and turn on pump B-1, the heat pump unit, and valve F1-2, allowing the heat pump unit to heat the water in water tank 1... When the hot water is heated to 30℃, the heat pump unit is turned off, and water pump B-4 is turned on to heat the water in water tank 1 to 52℃. Then, water pump B-4 is turned off, completing the heating of the water in water tank 1. When the temperature of water tank 2 T2 < 45℃ and the water temperature of water tank 1 is higher than the set water temperature of 50℃, pumps B-1 and F1-1 are turned on to transfer the hot water from water tank 1 to water tank 2 to keep the water temperature in water tank 2 up to the set temperature of 50℃, completing the heat preservation process. When the water temperature of water tank 2 is lower than 45℃ and the water temperature of water tank 1 is lower than the set water temperature of 50℃, the water in water tank 1 is reheated by solar energy to 52℃.

[0038] When the solar radiation intensity is less than Eb but greater than Ec, open valves F3-1 and F7-1 until the solar water heater is full. When the solar-heated water temperature T4 is ≥30℃, open valve B-4 to store water at 30℃ until the water tank 1 is full. Then, turn on pump B-1 and the heat pump unit, and open valve F1-1 to heat the water in water tank 2 to the set temperature of 50℃. Close valve F1-1. Then, open valves F3-1 and F7-1 until the solar water heater is full. After the solar water heater heats the water to 30℃, open valve B-4 to store the water in water tank 1 until it is full. At this point, the water temperature in tank 1 reaches 30°C. Pump B-1, the heat pump unit, and valve F1-2 are turned on until the water temperature in tank 1 reaches 50°C. Then, pump B-1, the heat pump unit, and valve F1 are turned off to complete the heating of the hot water in tank 1. When the temperature T2 in tank 2 is less than 45°C, the heat pump unit, pump B-2, and valve F1-1 are turned on until the water temperature in tank 2 reaches 50°C to complete the insulation of tank 2. When the temperature T1 in tank 1 is less than 45°C, the heat pump unit, pump B-1, and valve F1-2 are turned on until the water temperature in tank 1 reaches 50°C to complete the insulation of tank 2.

[0039] When the solar radiation intensity is less than Ec, open valve F3-2 until water tank 2 is full, turn on water pump B-2, heat pump unit and valve F1-1 until the water temperature in water tank 2 reaches the set temperature of 50℃. Then switch the water supply valves to the open state of F3-1 and F7-2 until water tank 1 is full, turn on water pump B-1, heat pump unit and valve F1-2 until the water temperature in water tank 1 reaches 50℃, and complete the heating of water tank 1. When the temperature T2 of water tank 2 is less than 45℃, turn on heat pump unit, water pump B-2 and valve F1-1 until the water temperature in water tank 2 reaches 50℃, and complete the heat preservation of water tank 2. When the temperature T1 of water tank 1 is less than 45℃, turn on heat pump unit, water pump B-1 and F1-2 until the water temperature in water tank 1 reaches 50℃, and complete the heat preservation of water tank 2.

[0040] When a user needs hot water, the system first determines the water temperature of water tank 1 and water tank 2. If the water temperature T1 of water tank 1 is greater than or equal to the water temperature T2 of water tank 2, the system opens valve F5-1 to supply water to the user; otherwise, the system opens valve F5-2 to supply water to the user.

[0041] As can be seen, in this embodiment, the solar water outlet temperature and insulation method are set according to the differences in solar radiation illuminance to improve the utilization rate of solar energy. In addition, by adding a three-way water supply valve, the solar energy and the hot water unit are connected in series for tiered heating. By comprehensively scheduling the equipment operation, the system fully utilizes solar energy to produce hot water while reducing the inlet water temperature of the hot water unit, improving unit energy efficiency, reducing operating costs, and increasing the system's hot water output.

[0042] Corresponding to the above Figure 1 This application provides a water temperature control device based on a hot water system, such as... Figure 4 As shown, the device includes: The first determining module 402 is used to determine the solar radiation intensity of the current environment of the hot water system; The second determining module 404 is used to determine the heating strategy for heating the first water tank and the second water tank in the hot water system based on the intensity range of solar radiation intensity. The heating strategy refers to whether the heating source for heating the first water tank and the second water tank is solar energy or a heat pump unit in the hot water system. The first processing module 406 is used to execute a heating strategy to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank, and after the heating is completed, to execute a heat preservation strategy to keep the second water tank warm based on the heating strategy. The first water tank is closer to the solar collector tube in the hot water system than the second water tank. The solar collector tube uses solar energy to heat the water.

[0043] The apparatus of this application first determines the solar radiation intensity of the current environment of the hot water system, then determines a heating strategy for heating the first and second water tanks in the hot water system based on the intensity range of the solar radiation intensity, then executes the heating strategy so that the solar energy and the heat pump unit work together to heat the first and second water tanks, and after the heating is completed, executes a heat preservation strategy for heat preservation of the second water tank based on the heating strategy. As can be seen, in this embodiment, the strategy of co-heating by solar energy and heat pump units is selected based on the current solar radiation intensity. That is, the greater the solar radiation intensity, the more times and the more water tanks are heated by solar energy, which can make full use of the sun and thus save energy consumption of the hot water system. Moreover, in this application, a corresponding heat preservation strategy can be executed according to the heating strategy. That is, if the current solar radiation intensity is high, the first water tank can be heated by solar energy, and then the water in the first water tank and the second water tank can be exchanged to achieve the purpose of heat preservation. If the current solar radiation intensity is low, the heat pump unit will be used to preserve the second water tank. It can be seen that solar energy is also fully utilized in the heat preservation stage, further saving energy consumption, thereby solving the problem of low utilization rate of solar energy resources caused by the use of fixed outlet water temperature in the hot water system of the prior art.

[0044] In an optional embodiment of this application, the second determining module may further include: a first determining unit, configured to determine a heating strategy as a first heating strategy when the solar radiation intensity is greater than a first preset threshold, wherein the first heating strategy indicates heating the first water tank and the second water tank using solar energy; a second determining unit, configured to determine a heating strategy as a second heating strategy when the solar radiation intensity is greater than a second preset threshold and less than a first preset threshold, wherein the second heating strategy indicates heating the first water tank multiple times using solar energy and heating the second water tank multiple times using a heat pump unit; a third determining unit, configured to determine a heating strategy as a third heating strategy when the solar radiation intensity is greater than a third preset threshold and less than a second preset threshold, wherein the third heating strategy indicates heating the first water tank multiple times using solar energy and a heat pump unit, and heating the second water tank multiple times using a heat pump unit; and a fourth determining unit, configured to determine a heating strategy as a fourth heating strategy when the solar radiation intensity is less than a third preset threshold, wherein the fourth heating strategy indicates heating the first water tank and the second water tank multiple times using a heat pump unit.

[0045] In an optional embodiment of this application, the first processing module may further include: a control unit for controlling a three-way valve in the hot water system to replenish water to the solar collector to full level; a first processing unit for heating the water in the solar collector to a first preset temperature based on solar energy, and then transporting the heated water to a second water tank for storage; a second processing unit for replenishing water to the solar collector again, heating it to a second preset temperature, and then transporting it to the first water tank for storage; and a third processing unit for controlling the water in the first water tank to flow into the second water tank to keep the second water tank warm when the water temperature in the second water tank is lower than a third preset temperature and the water temperature in the first water tank is higher than the first preset temperature; wherein the third preset temperature is lower than the first preset temperature, and the first preset temperature is lower than the second preset temperature.

[0046] In an optional embodiment of this application, the first processing module may further include: a fourth processing unit, configured to control a heat pump unit to heat the water in the first water tank to a fourth preset temperature, and then solar energy to heat the water in the first water tank to a fifth preset temperature; a fifth processing unit, configured to transfer the water in the first water tank to a second water tank, and refill the first water tank, and control the heat pump unit to heat the water in the first water tank to a fourth preset temperature, and then solar energy to heat the water in the first water tank to a sixth preset temperature; a sixth processing unit, configured to control the water in the first water tank to flow into the second water tank to keep the second water tank warm when the water temperature in the second water tank is lower than a seventh preset temperature and the water temperature in the first water tank is higher than a fifth preset temperature; wherein the sixth preset temperature is greater than the fifth preset temperature, the fifth preset temperature is greater than the fourth preset temperature, and the seventh preset temperature is less than the fifth preset temperature.

[0047] In an optional embodiment of this application, the first processing module may further include: a seventh processing unit, configured to heat water in the solar collector to an eighth preset temperature based on solar energy and store it in a first water tank, and then transport the heated water in the first water tank to a second water tank; an eighth processing unit, configured to control a heat pump unit to heat water in the second water tank to a ninth preset temperature; a ninth processing unit, configured to reheat water in the solar collector to the eighth preset temperature based on solar energy and store it in the first water tank, and then control a heat pump unit to heat water in the first water tank to the ninth preset temperature; and a tenth processing unit, configured to control a heat pump unit to heat and maintain the temperature of any water tank if the water temperature in either tank is lower than the tenth preset temperature; wherein the eighth preset temperature is lower than the ninth preset temperature, and the tenth preset temperature is lower than the ninth preset temperature.

[0048] In an optional embodiment of this application, the first processing module in this application embodiment may further include: an eleventh processing unit, used to control the heat pump unit to heat the water in the first water tank and the second water tank to an eleventh preset temperature respectively; and a twelfth processing unit, used to control the heat pump unit to heat the water tank when the water temperature in either water tank is lower than the twelfth preset temperature; wherein the eleventh preset temperature is greater than the twelfth preset temperature.

[0049] In an optional embodiment of this application, the device in this application includes: a second processing module, used to compare the water temperatures in the first water tank and the second water tank, and select the water tank with the higher water temperature to supply water to the user through the water supply three-way valve in the hot water system.

[0050] like Figure 5As shown in the figure, this application provides an electronic device, including a processor 411, a communication interface 412, a memory 413, and a communication bus 414, wherein the processor 411, the communication interface 412, and the memory 413 communicate with each other through the communication bus 414. Memory 413 is used to store computer programs; In one embodiment of this application, when the processor 411 executes the program stored in the memory 413, it implements the water temperature control method based on the hot water system provided in any of the aforementioned method embodiments, and its function is similar, so it will not be described again here.

[0051] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the water temperature control method based on a hot water system provided in any of the foregoing method embodiments.

[0052] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0053] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0054] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0055] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A water temperature control method based on a hot water system, characterized in that, include: Determine the solar radiation intensity of the current environment in which the hot water system is located; Based on the intensity range of the solar radiation intensity, a heating strategy for heating the first and second water tanks in the hot water system is determined, wherein the heating strategy refers to whether the heating source for heating the first and second water tanks is solar energy or a heat pump unit in the hot water system. The heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank. After heating is completed, a heat preservation strategy is executed to keep the second water tank warm based on the heating strategy. The first water tank is closer to the solar collector tube in the hot water system than the second water tank. The solar collector tube uses solar energy to heat the water.

2. The method according to claim 1, characterized in that, Based on the intensity range within which the solar radiation intensity falls, a heating strategy for heating the first and second water tanks in the hot water system is determined, including: When the solar radiation intensity is greater than a first preset threshold, the heating strategy is determined to be a first heating strategy, wherein the first heating strategy is used to indicate heating the first water tank and the second water tank by the solar energy; When the solar radiation intensity is greater than a second preset threshold and less than the first preset threshold, the heating strategy is determined to be a second heating strategy, wherein the second heating strategy is used to indicate that the first water tank is heated by the solar energy and the second water tank is heated multiple times by the heat pump unit. When the solar radiation intensity is greater than a third preset threshold and less than a second preset threshold, the heating strategy is determined to be a third heating strategy, wherein the third heating strategy is used to indicate that the first water tank is heated multiple times by the solar energy and heat pump unit, and the second water tank is heated by the heat pump unit; If the solar radiation intensity is less than the third preset threshold, the heating strategy is determined to be a fourth heating strategy, wherein the fourth heating strategy is used to indicate that the first water tank and the second water tank are heated by the heat pump unit.

3. The method according to claim 2, characterized in that, The first heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank. After heating is completed, a heat preservation strategy is executed based on the heating strategy to keep the second water tank warm, including: Control the water supply three-way valve in the hot water system to supply water to the solar collector until it is full; Based on the solar energy, the water in the solar collector is heated to a first preset temperature, and the heated water is then transported to the second water tank for storage. Water is added to the solar collector again and heated to the second preset temperature before being transported to the first water tank for storage. When the water temperature in the second water tank is lower than the third preset temperature and the water temperature in the first water tank is higher than the first preset temperature, the water in the first water tank is controlled to flow into the second water tank to keep the second water tank warm. Wherein, the third preset temperature is less than the first preset temperature, and the first preset temperature is less than the second preset temperature.

4. The method according to claim 2, characterized in that, The second heating strategy is executed to enable the solar energy and heat pump unit to work together to heat the first and second water tanks, and after heating is completed, a heat preservation strategy is executed based on the heating strategy to keep the second water tank warm, including: The heat pump unit is controlled to heat the water in the first water tank to a fourth preset temperature, and then the solar energy heats the water in the first water tank to a fifth preset temperature. The water in the first water tank is transferred to the second water tank, and the first water tank is refilled. The heat pump unit is controlled to heat the water in the first water tank to the fourth preset temperature. Then, the solar energy heats the water in the first water tank to the sixth preset temperature. When the water temperature in the second water tank is lower than the seventh preset temperature and the water temperature in the first water tank is higher than the fifth preset temperature, the water in the first water tank is controlled to flow into the second water tank to keep the second water tank warm. Wherein, the sixth preset temperature is greater than the fifth preset temperature, the fifth preset temperature is greater than the fourth preset temperature, and the seventh preset temperature is less than the fifth preset temperature.

5. The method according to claim 2, characterized in that, The third heating strategy is implemented to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank, and after heating is completed, a heat preservation strategy is implemented to keep the second water tank warm based on the heating strategy, including: The water in the solar collector is heated to an eighth preset temperature by solar energy and stored in the first water tank. The heated water in the first water tank is then transported to the second water tank. The heat pump unit is controlled to heat the water in the second water tank to the ninth preset temperature; The water in the solar collector is reheated to the eighth preset temperature by solar energy and stored in the first water tank. Then, the heat pump unit is controlled to heat the water in the first water tank to the ninth preset temperature. If the water temperature in any water tank is lower than the tenth preset temperature, the heat pump unit is controlled to heat and insulate the water tank. The eighth preset temperature is lower than the ninth preset temperature, and the tenth preset temperature is lower than the ninth preset temperature.

6. The method according to claim 2, characterized in that, The fourth heating strategy is implemented to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank, and after heating is completed, a heat preservation strategy is implemented to keep the second water tank warm based on the heating strategy, including: The heat pump unit is controlled to heat the water in the first water tank and the second water tank to the eleventh preset temperature, respectively. If the water temperature in any water tank is lower than the twelfth preset temperature, the heat pump unit is controlled to heat and insulate the water tank. The eleventh preset temperature is greater than the twelfth preset temperature.

7. The method according to claim 1, characterized in that, The method includes: The water temperatures in the first water tank and the second water tank are compared, and the water tank with the higher water temperature is selected to supply water to the user through the water supply three-way valve in the hot water system.

8. A water temperature control device based on a hot water system, characterized in that, include: The first determining module is used to determine the solar radiation intensity of the current environment in which the hot water system is located; The second determining module is used to determine a heating strategy for heating the first water tank and the second water tank in the hot water system based on the intensity range in which the solar radiation intensity falls, wherein the heating strategy refers to whether the heating source for heating the first water tank and the second water tank is solar energy or a heat pump unit in the hot water system. The first processing module is used to execute the heating strategy to enable the solar energy and heat pump unit to work together to heat the first water tank and the second water tank, and after the heating is completed, to execute a heat preservation strategy to keep the second water tank warm based on the heating strategy. The first water tank is closer to the solar collector tube in the hot water system than the second water tank. The solar collector tube uses solar energy to heat the water.

9. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. The memory is used to store computer programs; the processor is used to execute the computer programs to implement the water temperature control method based on a hot water system as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the water temperature control method based on a hot water system as described in any one of claims 1-7.

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