A water temperature control method and device, a household appliance and a storage medium

Abstract

The application discloses a water temperature control method and device, a household appliance and a storage medium. The method comprises the following steps: acquiring a first temperature of a water outlet end; calculating a difference value between a target temperature and the first temperature, and adjusting the opening and closing states of a first valve and a second valve based on the relationship between the difference value and a preset temperature difference range, so that the first temperature difference value is within the preset temperature range. In this way, the opening and closing states of the first valve and the second valve are adjusted according to the relationship between the temperature difference between the target temperature and the actual water outlet temperature and the preset temperature difference range, the water source for the water supply end to supply water can be adjusted, the water temperature of different water sources is different, the first temperature of the water flow of the water supply end can be adjusted by adjusting the water source, the temperature difference between the target temperature and the actual water outlet temperature can be controlled within a certain range, the precision and the automation degree of the water temperature control are improved, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of household appliances, and more particularly to a water temperature control method, device, household appliance, and storage medium. Background Technology

[0002] The water temperature control schemes of household appliances, whether air source heat pump water heaters or gas water heaters, can only produce high-temperature hot water, approximately above 50℃. Users cannot directly use this hot water; they must manually adjust the terminal valve to control the ratio of hot and cold water to achieve the desired temperature, making the process complex. Furthermore, current water heater temperature control methods rely on controlling the tank temperature. Heating stops when the tank reaches the set temperature and resumes when the temperature drops below a certain threshold. Therefore, when hot water usage is high, the tank temperature will decrease or fluctuate, requiring users to manually adjust the terminal valve repeatedly. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application aim to provide a water temperature control method, device, household appliance, and storage medium.

[0004] The technical solution of this application is implemented as follows: In a first aspect, a water temperature control method is provided, the method comprising: When the switch for the water outlet is in the open state, the first temperature of the water outlet is obtained; Calculate the difference between the target temperature and the first temperature to obtain the first temperature difference; based on the relationship between the first temperature difference and the preset temperature difference range, adjust the opening and closing states of the first valve and the second valve so that the first temperature difference is within the preset temperature range. When the first valve is open, the first water source supplies water to the outlet through the first valve; when the second valve is open, the second water source supplies water to the outlet through the second valve; and the water temperature of the first water source is different from that of the second water source.

[0005] In the above scheme, when the water temperature of the first water source is greater than that of the second water source, the step of adjusting the opening and closing states of the first valve and the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: when the first temperature difference is greater than or equal to the maximum preset temperature difference of the preset temperature difference range, and the duration for which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than a first preset duration, controlling the first valve to be in the open state and the second valve to be in the closed state.

[0006] In the above scheme, when the water temperature of the first water source is greater than that of the second water source, the step of adjusting the opening and closing states of the first valve and the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: when the first temperature difference is less than or equal to the minimum preset temperature difference of the preset temperature difference range, and the duration during which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than a second preset duration, the first valve is controlled to be in a closed state and the second valve is controlled to be in an open state.

[0007] In the above scheme, the method further includes: when the first valve is in the open state, determining a first opening ratio of the first valve based on the relationship between the first temperature difference and a preset temperature difference range, so that the first temperature difference is within the preset temperature difference range; and / or, when the second valve is in the open state, determining a second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range, so that the first temperature difference is within the preset temperature difference range.

[0008] In the above scheme, determining the first opening ratio of the first valve based on the relationship between the first temperature difference and the preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the first opening ratio; determining the second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the second opening ratio.

[0009] In the above scheme, the method further includes: obtaining a second temperature of a third water source, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source; calculating the difference between the first temperature and the second temperature as a second temperature difference; when both the first valve and the second valve are in the closed state, calculating and recording the first average value of the second temperature difference within a third preset time period; when the first valve is in the open state and the second valve is in the closed state, obtaining the opening ratio of the first valve; calculating the first ratio of the second temperature difference to the opening ratio of the first valve, and recording the first average value of the first ratio within the third preset time period; when the first valve is in the closed state and the second valve is in the open state, obtaining the opening ratio of the second valve; calculating the second ratio of the second temperature difference to the opening ratio of the second valve, and recording the second average value of the second ratio within the third preset time period; when obtaining the first temperature at the outlet fails, determining the first temperature based on the open / closed states of the first valve and the second valve, the second temperature, the first average value, the first average value, and the second average value.

[0010] In the above scheme, determining the first temperature based on the on / off states of the first valve and the second valve, the second temperature, the first average value, the first ratio average value, and the second ratio average value includes: when the first valve and the second valve are in the closed state, calculating the sum of the second temperature and the first average value as the first temperature; when the first valve is in the open state and the second valve is in the closed state, obtaining the first opening ratio of the first valve; calculating the first product of the first ratio average value and the first opening ratio; and summing the first product and the second temperature as the first temperature; when the first valve is in the closed state and the second valve is in the open state, obtaining the second opening ratio of the second valve; calculating the second product of the second ratio average value and the second opening ratio; and summing the second product and the second temperature as the first temperature.

[0011] In the above scheme, when the water temperature of the first water source is greater than that of the second water source, the method further includes: controlling the first heating module to heat the first water source so that the water temperature of the first water source is within a first preset temperature range; controlling the first heating module and the second heating module to heat the third water source so that the water temperature of the third water source is within a second preset temperature range, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperatures of the first water source and the second water source; wherein the second heating module is used to recover heat in the hot water supply system and heat the third water source based on the recovered heat.

[0012] Secondly, a water temperature control device is provided, the device comprising: The acquisition module is used to acquire the first temperature of the water outlet when the switch at the water outlet is in the open state. The processing module is used to calculate the difference between the target temperature and the first temperature to obtain a first temperature difference; based on the relationship between the first temperature difference and a preset temperature difference range, it adjusts the opening and closing states of the first valve and the second valve so that the first temperature difference is within the preset temperature range; wherein, when the first valve is in the open state, the first water source supplies water to the outlet through the first valve; when the second valve is in the open state, the second water source supplies water to the outlet through the second valve; wherein, the water temperature of the first water source is different from the water temperature of the second water source.

[0013] Thirdly, a household appliance is provided, the household appliance comprising: a processor and a memory configured to store a computer program capable of running on the processor, wherein the processor is configured to perform the steps of the aforementioned method when running the computer program.

[0014] Fourthly, a computer storage medium is provided that stores a computer program thereon, wherein the computer program, when executed by a processor, implements the steps of the aforementioned method.

[0015] This application discloses a water temperature control method, device, household appliance, and storage medium. Based on the relationship between the temperature difference between the user's desired target temperature and the actual outlet water temperature and a preset temperature difference range, the opening and closing states of a first valve and a second valve are adjusted. This allows adjustment of the water source supplied to the outlet. Since different water sources have different temperatures, adjusting the water source can adjust the first temperature of the water flow at the outlet, thereby controlling the temperature difference between the user's desired target temperature and the actual outlet water temperature within a certain range. This improves the accuracy and automation of water temperature control, ultimately enhancing the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first process of the water temperature control method in the embodiments of this application; Figure 2 This is a schematic diagram of the second process of the water temperature control method in the embodiments of this application; Figure 3 This is a schematic diagram of the hot water supply system in an embodiment of this application; Figure 4 This is a schematic diagram of the composition of the water temperature control device in the embodiments of this application; Figure 5 This is a schematic diagram of the composition of household appliances in the embodiments of this application. Detailed Implementation

[0017] In order to gain a more detailed understanding of the features and technical content of the embodiments of this application, the implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this application.

[0018] This application provides a water temperature control method. Figure 1 This is a schematic diagram of the first process of the water temperature control method in the embodiments of this application, as shown below. Figure 1 As shown, the water temperature control method may specifically include: Step 101: When the switch at the water outlet is in the open state, obtain the first temperature at the water outlet.

[0019] Here, the water outlet is located on the user's side, and the user can control the water flow by controlling the outlet switch. When the outlet switch is turned on, the water flowing out can be used directly. Here, the initial temperature of the outlet is equal to the temperature of the water flowing out. In practical applications, this initial temperature can be measured by a temperature sensor installed at the outlet.

[0020] Step 102: Calculate the difference between the target temperature and the first temperature to obtain the first temperature difference.

[0021] Here, the target temperature is the preset ideal water outlet temperature, which can be set by the user according to their needs, and is also the default value set by the manufacturer at the factory. For example, multiple target temperatures can be set for different water usage modes. That is, the desired water temperature when using each water usage mode. For example, water usage modes can be: shower mode, foot bath mode, normal mode, etc. For example, the target temperature can be set to 38℃ by default, or the user can select and set it within the range of 30~40℃ & room temperature (using only tap water).

[0022] Here, the first temperature difference is determined by the difference between the target temperature and the first temperature. It is used to characterize the degree to which the target temperature deviates from the first temperature. The larger the difference, the higher the target temperature is than the first temperature. In this case, the first temperature at the outlet needs to be increased to reduce the first temperature difference until the user's needs are met.

[0023] Step 103: Based on the relationship between the first temperature difference and the preset temperature difference range, adjust the opening and closing states of the first valve and the second valve so that the first temperature difference is within the preset temperature range. When the first valve is open, the first water source supplies water to the outlet through the first valve; when the second valve is open, the second water source supplies water to the outlet through the second valve. The water temperature of the first water source is different from that of the second water source.

[0024] Here, the preset temperature difference range is used to characterize the accuracy of water temperature control. For example, the preset temperature difference range is (-1℃, 1℃), which means that by using the water temperature control method of this application, the first temperature difference value can be within (-1℃, 1℃), that is, the outlet water temperature accuracy can be controlled within ±1℃.

[0025] Here, the first and second valves can be proportional two-way valves. For example, in practical applications, a proportional three-way valve can also perform the functions of these two valves.

[0026] For example, in some embodiments, the method further includes: when the switch at the water outlet is in the open state, a third water source supplies water to the water outlet; wherein the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source.

[0027] It should be noted that there is no valve connection between the third water source and the outlet. Regardless of the on / off state of the first and second valves, as long as the outlet valve is open, the third water source will always supply water to the outlet. Generally, the temperature of the third water source is closest to the target temperature, the temperature of the first water source is higher than the target temperature, and the temperature of the second water source is lower than the target temperature. For example, the first water source can be called a high-temperature water source, the second water source can be a normal-temperature water source, such as tap water, and the third water source can be called a low-temperature water source.

[0028] For example, in some embodiments, when the water temperature of the first water source is greater than that of the second water source, the method further includes: controlling the first heating module to heat the first water source so that the water temperature of the first water source is within a first preset temperature range; controlling the first heating module and the second heating module to heat the third water source so that the water temperature of the third water source is within a second preset temperature range, wherein when the switch at the water outlet is in the open state, the third water source supplies water to the water outlet, and the water temperature of the third water source is between the water temperatures of the first water source and the second water source; wherein the second heating module is used to recover heat in the hot water supply system and heat the third water source based on the recovered heat.

[0029] Here, when the water temperature of the first water source is greater than that of the second water source, it is equivalent to the water temperature of the third water source being less than that of the first water source but greater than that of the second water source. For example, the first water source is a high-temperature water source, the second water source is a normal-temperature water source, and the third water source is a low-temperature water source. For example, when the household appliance is an electric water heater (or a heat pump water heater), the target temperature range is 30–40℃, normal temperature; the first preset temperature range corresponding to the first water source is 50–60℃; and the second preset temperature range corresponding to the third water source is 37–40℃.

[0030] Here, the first heating module can be a conventional heating module, such as one based on solar energy, electricity, heat pumps, or air source heat pumps; that is, the first heating module can be a conventional energy source heating module. For example, in practical applications, the second heating module, in addition to the heat from the hot water supply system, can also recover heat from other systems that generate heat loss and use it to heat the third water source. The second heating module can effectively utilize the heat from systems that generate heat loss and also solve the heat dissipation problem of the computer room; that is, the second heating module can be a heat recovery energy heating module. For example, in some embodiments, the heat from the third water source mainly comes from the second heating module, and a small portion comes from the first heating module.

[0031] For example, when the same first heating module heats both the first water source and the third water source simultaneously, the heating priority of the third water source can be set to be higher than that of the first water source. This is because the water temperature of the third water source is closer to the target water temperature, making it the primary water source for supplying water to the outlet.

[0032] By employing a conventional heating module and a second heating module that uses recovered energy to heat a third water source with lower temperature requirements (compared to the first water source), the waste of heat resources can be reduced while ensuring the temperature requirements of the third water source are met.

[0033] When the first temperature difference is within a preset temperature difference range, it indicates that the first temperature difference meets the preset range, and no temperature adjustment is required. For example, in some embodiments, adjusting the opening and closing states of the first valve and the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: maintaining the current opening and closing states of the first valve and the second valve when the first temperature difference is within the preset temperature difference range.

[0034] When the first temperature difference is not within the preset temperature difference range, it indicates that the first temperature difference does not meet the preset range and temperature adjustment is required.

[0035] For example, in some embodiments, when the water temperature of the first water source is greater than that of the second water source, the opening and closing states of the first valve and the second valve are adjusted based on the relationship between the first temperature difference and the preset temperature difference range. This includes: when the first temperature difference is greater than or equal to the maximum preset temperature difference of the preset temperature difference range, and the duration for which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than the first preset duration, the first valve is controlled to be in the open state and the second valve is controlled to be in the closed state.

[0036] Here, the water temperature of the first water source is higher than that of the second water source, which is equivalent to the water temperature of the third water source being lower than that of the first water source but higher than that of the second water source. In this case, the first valve is a heating valve, and the second valve is a cooling valve. For example, the first water source is a high-temperature water source, the second water source is a normal-temperature water source, and the third water source is a low-temperature water source.

[0037] The maximum preset temperature difference is the maximum value within the preset temperature difference range. When the first temperature difference is greater than or equal to the maximum preset temperature difference within the preset temperature difference range, and the duration for which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than the first preset duration, it indicates that the heating valve needs to be opened to heat the first water temperature so that the first temperature at the outlet approaches the target temperature, thereby reducing the first temperature difference until it falls within the preset temperature difference range.

[0038] For example, in some embodiments, when the water temperature of the first water source is greater than that of the second water source, the opening and closing states of the first valve and the second valve are adjusted based on the relationship between the first temperature difference and the preset temperature difference range. This includes: when the first temperature difference is less than or equal to the minimum preset temperature difference of the preset temperature difference range, and the duration during which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than the second preset duration, the first valve is controlled to be in a closed state and the second valve is controlled to be in an open state.

[0039] The minimum preset temperature difference is the minimum value of the preset temperature difference range. When the first temperature difference is less than or equal to the minimum preset temperature difference of the preset temperature difference range, and the duration for which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than the second preset duration, it indicates that the cooling valve needs to be opened to cool down the first water temperature so that the first temperature at the outlet is close to the target temperature, thereby reducing the first temperature difference until it is within the preset temperature difference range.

[0040] For example, the first preset duration and the second preset duration may be equal or unequal.

[0041] For example, in some embodiments, the method further includes: when the first valve is in the open state, determining a first opening ratio of the first valve based on the relationship between the first temperature difference and a preset temperature difference range, so that the first temperature difference is within the preset temperature difference range; and / or, when the second valve is in the open state, determining a second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range, so that the first temperature difference is within the preset temperature difference range.

[0042] Here, by controlling the first opening ratio of the first valve, the flow rate of water from the first water source to the outlet can be controlled. By controlling the second opening ratio of the second valve, the flow rate of water from the second water source to the outlet can be controlled. Generally, the adjustable range of the opening ratio is 10%-100%.

[0043] For example, in some embodiments, determining a first opening ratio of a first valve based on the relationship between a first temperature difference and a preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the first opening ratio; determining a second opening ratio of a second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the second opening ratio.

[0044] Here, proportional PID control is used to determine the opening ratio of the first valve and the second valve so that the first temperature difference is within a preset temperature difference range. Based on the first temperature difference and the preset temperature difference range, when performing proportional PID control, the greater the deviation of the first temperature difference from the preset temperature difference range, the greater the opening ratio of the first valve or the second valve; conversely, the smaller the deviation of the first temperature difference from the preset temperature difference range, the smaller the opening ratio of the first valve or the second valve.

[0045] Here, the execution entity for steps 101 to 103 can be the processor of a household appliance.

[0046] The technical solution of this application embodiment adjusts the opening and closing states of the first valve and the second valve according to the relationship between the temperature difference between the user's desired target temperature and the actual outlet water temperature and the preset temperature difference range. This can adjust the water source supplied to the outlet. Since different water sources have different temperatures, adjusting the water source can adjust the first temperature of the water flow at the outlet, thereby controlling the temperature difference between the user's desired target temperature and the actual outlet water temperature within a certain range, improving the accuracy of water temperature control, and preventing significant fluctuations in the hot water temperature at the user's end, thus enhancing the user experience. It can also achieve automatic adjustment of the outlet water temperature, eliminating the need for manual adjustment by the user and improving the automation level of water temperature control.

[0047] It should be noted that the water source in this application can also be other liquid sources, and the method of this application can also be used to control the temperature of other liquids.

[0048] To better illustrate the purpose of this application, further examples are provided based on the embodiments described above. Figure 2 This is a schematic diagram of the second process of the water temperature control method in an embodiment of this application. Figure 2 As shown, the water temperature control method includes: Step 201: When the switch at the water outlet is in the open state, obtain the first temperature at the water outlet.

[0049] In practical applications, there may be situations where the first temperature at the water outlet fails to be obtained. This could be due to a malfunction in the sensor used to measure the first temperature at the water outlet, or a malfunction in the module used to obtain the first temperature at the water outlet.

[0050] For example, in some embodiments, the method further includes: obtaining a second temperature of a third water source, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source; calculating the difference between the first temperature and the second temperature as the second temperature difference; when both the first valve and the second valve are in the closed state, calculating and recording the first average value of the second temperature difference within a third preset time period; when the first valve is in the open state and the second valve is in the closed state, obtaining the opening ratio of the first valve; calculating the first ratio of the second temperature difference to the opening ratio of the first valve, and recording the first average value of the first ratio within a third preset time period; when the first valve is in the closed state and the second valve is in the open state, obtaining the opening ratio of the second valve; calculating the second ratio of the second temperature difference to the opening ratio of the second valve, and recording the second average value of the second ratio within a third preset time period; when obtaining the first temperature at the outlet fails, determining the first temperature based on the open / closed states of the first valve and the second valve, the second temperature, the first average value, the first average value, and the second average value.

[0051] For example, in some embodiments, determining the first temperature based on the on / off state of the first valve and the second valve, a second temperature, a first average value, a first ratio average value, and a second ratio average value includes: when the first valve and the second valve are in the closed state, calculating the sum of the second temperature and the first average value as the first temperature; when the first valve is in the open state and the second valve is in the closed state, obtaining a first opening ratio of the first valve; calculating a first product of the first ratio average value and the first opening ratio; and summing the first product and the second temperature as the first temperature; when the first valve is in the closed state and the second valve is in the open state, obtaining a second opening ratio of the second valve; calculating a second product of the second ratio average value and the second opening ratio; and summing the second product and the second temperature as the first temperature.

[0052] By recording the first average value, the first ratio average value, and the second ratio average value, when the first temperature cannot be obtained, the current first temperature can be determined by using the current second temperature and the recorded average value information, thereby improving the reliability of water temperature control methods and household appliances.

[0053] Step 202: Calculate the difference between the target temperature and the first temperature to obtain the first temperature difference.

[0054] Step 203: When the first temperature difference is greater than or equal to the maximum preset temperature difference within the preset temperature difference range, and the duration for which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than the first preset duration, control the first valve to be in the open state and the second valve to be in the closed state.

[0055] When the first valve is open, the first water source supplies water to the outlet through the first valve; when the second valve is open, the second water source supplies water to the outlet through the second valve; regardless of the state of the first and second valves, the third water source supplies water to the outlet; the water temperature of the third water source is lower than that of the first water source but higher than that of the second water source.

[0056] Step 204: Based on the relationship between the first temperature difference and the preset temperature difference range, determine the first opening ratio of the first valve so that the first temperature difference is within the preset temperature difference range.

[0057] For example, determining the first opening ratio of the first valve based on the relationship between the first temperature difference and the preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the first opening ratio.

[0058] Proportional PID control can be achieved using a PID controller.

[0059] Step 205: When the first temperature difference is less than or equal to the minimum preset temperature difference within the preset temperature difference range, and the duration during which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than the second preset duration, control the first valve to be in the closed state and the second valve to be in the open state.

[0060] Step 206: Based on the relationship between the first temperature difference and the preset temperature difference range, determine the second opening ratio of the second valve so that the first temperature difference is within the preset temperature difference range.

[0061] For example, determining the second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: performing proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the second opening ratio.

[0062] Here, the execution entity for steps 201 to 206 can be the processor of a household appliance.

[0063] The technical solution of this application embodiment adjusts the opening and closing states and opening ratios of the first and second valves based on the relationship between the temperature difference between the user's desired target temperature and the actual outlet water temperature and a preset temperature difference range. This adjusts the water source supplying water to the outlet and the flow rate of each water source towards the outlet. Since different water sources have different temperatures, by adjusting the water source and the flow rate of each water source towards the outlet, the first temperature at the outlet can be precisely adjusted. This controls the temperature difference between the user's desired target temperature and the actual outlet water temperature within a certain range, improving the accuracy of water temperature control and preventing significant fluctuations in the hot water temperature at the user's end, thus enhancing the user experience. Furthermore, it enables automatic adjustment of the outlet water temperature, eliminating the need for manual adjustment by the user and increasing the automation level of water temperature control.

[0064] To better demonstrate the purpose of this application, based on the embodiments described above, this application proposes a hot water supply system. For example, Figure 3 This is a schematic diagram of the hot water supply system in an embodiment of this application. Figure 3 As shown, the hot water supply system includes a heating section and a water supply section.

[0065] The heating component includes a conventional heat source and a heat recovery heat source. The conventional heat source is used to heat both the high-temperature and low-temperature water tanks. The heat recovery heat source is used to heat the low-temperature water tank. For example, the conventional heat source includes a first heating module as described in this embodiment, and the heat recovery heat source includes a second heating module as described in this embodiment.

[0066] like Figure 3As shown, the conventional heat source includes conventional heat pump unit components, including a compressor, outdoor unit heat exchanger, throttling device (valve 1), and water-fluorine heat exchanger, etc. The first heating module can be the water-fluorine heat exchanger.

[0067] The water supply system includes: a water pump, a high-temperature water tank, a low-temperature water tank, two-way valve 1, two-way valve 2, temperature sensor 1, temperature sensor 2, and temperature sensor 3. The high-temperature water tank provides a high-temperature water source, and the second water tank provides a low-temperature water source. When the water supply valve is open, ambient temperature water (such as tap water) enters the high-temperature and low-temperature water tanks; when the two-way valve is open, ambient temperature water (such as tap water) enters the outlet.

[0068] Figure 4 This is a schematic diagram of the composition of a water temperature control device in an embodiment of this application, illustrating an apparatus for implementing a water temperature control method. The water temperature control device 40 specifically includes: The acquisition module 401 is used to acquire the first temperature of the water outlet when the switch at the water outlet is in the open state. Processing module 402 is used to calculate the difference between the target temperature and the first temperature to obtain a first temperature difference; based on the relationship between the first temperature difference and a preset temperature difference range, adjust the opening and closing states of the first valve and the second valve so that the first temperature difference is within the preset temperature range; wherein, when the first valve is in the open state, the first water source supplies water to the outlet through the first valve; when the second valve is in the open state, the second water source supplies water to the outlet through the second valve; regardless of the states of the first valve and the second valve, a third water source supplies water to the outlet; wherein, the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source.

[0069] In some embodiments, when the water temperature of the first water source is greater than the water temperature of the second water source, the processing module 402 controls the first valve to be in an open state and the second valve to be in a closed state when the first temperature difference is greater than or equal to the maximum preset temperature difference of the preset temperature difference range and the duration for which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than a first preset duration.

[0070] In some embodiments, when the water temperature of the first water source is greater than the water temperature of the second water source, the processing module 402 controls the first valve to be in a closed state and the second valve to be in an open state when the first temperature difference is less than or equal to the minimum preset temperature difference of the preset temperature difference range and the duration for which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than a second preset duration.

[0071] In some embodiments, the processing module 402 is further configured to, when the first valve is in the open state, determine a first opening ratio of the first valve based on the relationship between the first temperature difference and a preset temperature difference range, so that the first temperature difference is within the preset temperature difference range; and / or, when the second valve is in the open state, determine a second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range, so that the first temperature difference is within the preset temperature difference range.

[0072] In some embodiments, the processing module 402 is further configured to perform proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the first opening ratio; and to perform proportional PID adjustment based on the first temperature difference and the preset temperature difference range to determine the second opening ratio.

[0073] In some embodiments, the acquisition module 401 is further configured to acquire a second temperature of the third water source, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source; the processing module 402 is further configured to calculate the difference between the first temperature and the second temperature as a second temperature difference; when both the first valve and the second valve are in the closed state, calculate and record the first average value of the second temperature difference within a third preset time period; when the first valve is in the open state and the second valve is in the closed state, acquire the opening ratio of the first valve; calculate... Calculate the first ratio of the second temperature difference to the opening ratio of the first valve, and record the average value of the first ratio within the third preset time period; when the first valve is in the closed state and the second valve is in the open state, obtain the opening ratio of the second valve; calculate the second ratio of the second temperature difference to the opening ratio of the second valve, and record the average value of the second ratio within the third preset time period; when obtaining the first temperature at the outlet fails, determine the first temperature based on the on / off state of the first valve and the second valve, the second temperature, the first average value, the average value of the first ratio, and the average value of the second ratio.

[0074] In some embodiments, the processing module 402 is further configured to: when the first valve and the second valve are in a closed state, calculate the sum of the second temperature and the first average value as the first temperature; when the first valve is in an open state and the second valve is in a closed state, obtain a first opening ratio of the first valve; calculate a first product of the first ratio average value and the first opening ratio; and sum the first product and the second temperature as the first temperature; when the first valve is in a closed state and the second valve is in an open state, obtain a second opening ratio of the second valve; calculate a second product of the second ratio average value and the second opening ratio; and sum the second product and the second temperature as the first temperature.

[0075] In some embodiments, when the water temperature of the first water source is greater than that of the second water source, the processing module 402 is further configured to control the first heating module to heat the first water source so that the water temperature of the first water source is within a first preset temperature range; and to control the first heating module and the second heating module to heat the third water source so that the water temperature of the third water source is within a second preset temperature range, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperatures of the first water source and the second water source; wherein the second heating module is configured to recover heat in the hot water supply system and heat the third water source based on the recovered heat.

[0076] Based on the hardware implementation of each unit in the above-mentioned water temperature control device, this application embodiment also provides a household appliance. For example, this household appliance can be a water heater. Figure 5 This is a schematic diagram of the composition and structure of a household appliance in an embodiment of this application. For example... Figure 5 As shown, the device 50 includes: a processor 501 and a memory 502 configured to store computer programs capable of running on the processor; Wherein, when the processor 501 is configured to run a computer program, it executes the steps of the method in the foregoing embodiments.

[0077] Of course, in practical applications, such as Figure 5 As shown, the various components in this household appliance are coupled together via a bus system 503. It can be understood that the bus system 503 is used to enable communication between these components. In addition to a data bus, the bus system 503 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 5 The general designated all buses as Bus System 503.

[0078] In practical applications, the aforementioned processor can be at least one of the following: Application-Specific Integrated Circuit (ASIC), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), controller, microcontroller, and microprocessor. It is understood that, for different devices, the electronic device used to implement the above processor function can also be other types, and the embodiments of this application do not specifically limit it.

[0079] The aforementioned memory can be volatile memory, such as random-access memory (RAM); or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); or a combination of the above types of memory, and provides instructions and data to the processor.

[0080] In an exemplary embodiment, this application also provides a computer-readable storage medium, such as a memory including a computer program, which can be executed by a processor of a household appliance to perform the steps of the aforementioned method.

[0081] It should be understood that the terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items. The expressions “having,” “may have,” “comprising,” and “including,” or “may include” and “may contain” used herein may be used to indicate the presence of a corresponding feature (e.g., an element such as a number, function, operation, or component), but do not exclude the presence of additional features.

[0082] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other and are not necessarily used to describe a specific order or sequence. For example, without departing from the scope of the invention, first information can also be referred to as second information, and similarly, second information can also be referred to as first information. The technical solutions described in the embodiments of this application can be arbitrarily combined without conflict. In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatus, and devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division, and there may be other division methods in actual implementation, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical, or other forms.

[0083] The units described above 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 units may be selected to achieve the purpose of this embodiment according to actual needs.

[0084] In addition, each functional unit in the various embodiments of this application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0085] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A water temperature control method, characterized in that, The method includes: When the switch at the water outlet is in the open state, the first temperature of the water outlet is obtained; Calculate the difference between the target temperature and the first temperature to obtain the first temperature difference; Based on the relationship between the first temperature difference and the preset temperature difference range, the opening and closing states of the first valve and the second valve are adjusted so that the first temperature difference is within the preset temperature range; wherein, when the first valve is in the open state, the first water source supplies water to the outlet through the first valve; when the second valve is in the open state, the second water source supplies water to the outlet through the second valve. When the water temperature of the first water source is greater than that of the second water source, the first heating module is controlled to heat the first water source so that the water temperature of the first water source is within a first preset temperature range. The first heating module and the second heating module are controlled to heat the third water source so that the water temperature of the third water source is within a second preset temperature range. Regardless of the state of the first valve and the second valve, the third water source supplies water to the outlet. The second heating module is used to recover heat from the hot water supply system and heat the third water source based on the recovered heat; the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source, wherein the water temperature of the first water source is greater than the target temperature and the water temperature of the second water source is less than the target temperature.

2. The method according to claim 1, characterized in that, When the water temperature of the first water source is greater than the water temperature of the second water source, The step of adjusting the opening and closing states of the first valve and the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: When the first temperature difference is greater than or equal to the maximum preset temperature difference within the preset temperature difference range, and the duration during which the first temperature difference is greater than or equal to the maximum preset temperature difference is greater than a first preset duration, the first valve is controlled to be in the open state and the second valve is controlled to be in the closed state.

3. The method according to claim 1, characterized in that, When the water temperature of the first water source is greater than the water temperature of the second water source, The step of adjusting the opening and closing states of the first valve and the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: When the first temperature difference is less than or equal to the minimum preset temperature difference within the preset temperature difference range, and the duration during which the first temperature difference is less than or equal to the minimum preset temperature difference is greater than the second preset duration, the first valve is controlled to be in a closed state and the second valve is controlled to be in an open state.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: When the first valve is in the open state, based on the relationship between the first temperature difference and the preset temperature difference range, a first opening ratio of the first valve is determined so that the first temperature difference is within the preset temperature difference range. And / or, When the second valve is in the open state, based on the relationship between the first temperature difference and the preset temperature difference range, the second opening ratio of the second valve is determined so that the first temperature difference is within the preset temperature difference range.

5. The method according to claim 4, characterized in that, The step of determining the first opening ratio of the first valve based on the relationship between the first temperature difference and the preset temperature difference range includes: Based on the first temperature difference and the preset temperature difference range, a proportional PID adjustment is performed to determine the first opening ratio; The step of determining the second opening ratio of the second valve based on the relationship between the first temperature difference and the preset temperature difference range includes: Based on the first temperature difference and the preset temperature difference range, a proportional PID adjustment is performed to determine the second opening ratio.

6. The method according to claim 1, characterized in that, The method further includes: The second temperature of the third water source is obtained, wherein when the switch at the outlet is in the open state, the third water source supplies water to the outlet, and the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source. Calculate the difference between the first temperature and the second temperature, and use it as the second temperature difference; When both the first valve and the second valve are in the closed state, calculate and record the first average value of the second temperature difference within the third preset time period; When the first valve is in the open state and the second valve is in the closed state, obtain the opening ratio of the first valve; Calculate the first ratio of the second temperature difference to the opening ratio of the first valve, and record the average value of the first ratio within the third preset time period; When the first valve is in the closed state and the second valve is in the open state, obtain the opening ratio of the second valve; Calculate the second ratio of the second temperature difference to the opening ratio of the second valve, and record the average value of the second ratio within the third preset time period; When obtaining the first temperature at the outlet fails, the first temperature is determined based on the on / off states of the first valve and the second valve, the second temperature, the first average value, the first ratio average value, and the second ratio average value.

7. The method according to claim 6, characterized in that, Determining the first temperature based on the on / off states of the first valve and the second valve, the second temperature, the first average value, the first ratio average value, and the second ratio average value includes: When the first valve and the second valve are in the closed state, the sum of the second temperature and the first average value is calculated as the first temperature; When the first valve is in the open state and the second valve is in the closed state, obtain the first opening ratio of the first valve; Calculate the first product of the average of the first ratios and the first opening ratio; The sum of the first product and the second temperature is taken as the first temperature; When the first valve is in the closed state and the second valve is in the open state, obtain the second opening ratio of the second valve; Calculate the second product of the average of the second ratio and the second opening ratio; The sum of the second product and the second temperature is taken as the first temperature.

8. A water temperature control device, the device comprising: The acquisition module is used to acquire the first temperature of the water outlet when the switch at the water outlet is in the open state. The processing module is used to calculate the difference between the target temperature and the first temperature to obtain the first temperature difference. Based on the relationship between the first temperature difference and the preset temperature difference range, the opening and closing states of the first valve and the second valve are adjusted so that the first temperature difference is within the preset temperature range; wherein, when the first valve is in the open state, the first water source supplies water to the outlet through the first valve; when the second valve is in the open state, the second water source supplies water to the outlet through the second valve; regardless of the states of the first valve and the second valve, the third water source supplies water to the outlet; The processing module is further configured to: control the first heating module to heat the first water source so that the water temperature of the first water source is within a first preset temperature range; control the first heating module and the second heating module to heat the third water source so that the water temperature of the third water source is within a second preset temperature range, wherein, regardless of the state of the first valve and the second valve, the third water source supplies water to the outlet; wherein, the second heating module is configured to recover heat in the hot water supply system and heat the third water source based on the recovered heat; the water temperature of the third water source is between the water temperature of the first water source and the water temperature of the second water source, wherein the water temperature of the first water source is greater than the target temperature and the water temperature of the second water source is less than the target temperature.

9. A household appliance, characterized in that, The household appliance includes: a processor and a memory configured to store computer programs capable of running on the processor. Wherein, when the processor is configured to run the computer program, it performs the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 1 to 7.

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