Water purifier water output control method

Abstract

The present application provides a water outlet control method for a water purifier, the water purifier including a hot water control device, a cold water control device, a proportional adjustment device, and a heating device. The water outlet control method includes: obtaining a target water outlet temperature and a target water outlet flow rate; based on the target water outlet temperature and the target water outlet flow rate, determining that the heating device adopts a preset heating power, and obtaining a predicted value of the intersection water temperature in the proportional adjustment device; determining an initial water production ratio for the hot water control device and the cold water control device based on the predicted value of the intersection water temperature; obtaining the actual heating power of the heating device when producing water at the initial water production ratio; adjusting the initial water production ratio based on the actual heating power and the preset heating power so that the actual heating power approaches the preset heating power. The present application can maximize the heating power by adjusting the initial water production ratio, fully utilize the heating device, and enable the heating device to achieve constant temperature and quantitative water output at the maximum heating power as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of water purifiers, and in particular to a water outlet control method for a water purifier. Background Art

[0002] In the daily use of water purifiers, users hope to be able to draw water at a constant temperature, constant volume, and large flow rate when taking water. Currently, water purifiers on the market are roughly divided into two types, namely water purifiers without hot water tanks and water purifiers with hot water tanks. Due to the power limitation of the heating element, water purifiers without hot water tanks can only deliver water at a very small flow rate when users need boiling water. Water purifiers with hot water tanks generally keep the water in the hot water tank at a certain temperature. For example, the water temperature in the hot water tank is set to maintain at 50°C. This temperature can ensure the functions commonly used by users. At this time, due to the high water temperature, after passing through the heating element, it can be heated faster than cold water, so the flow rate can be larger than that without hot water tanks. However, the capacity of the hot water tank is limited, and the amount of water that can be continuously taken at a constant temperature is small. If users want to quickly produce a large amount of constant temperature water, it is difficult to meet the user's desired continuous water output at a constant temperature and large flow rate by simply heating the water in the hot water tank.

[0003] How to maintain high-flow constant-temperature water output for a longer period of time to meet the user's needs for continuous constant-temperature, high-flow water output has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a water outlet control method for a water purifier to solve the technical problem of how to achieve high flow rate and constant temperature water outlet for a longer period of time.

[0005] According to one aspect of an embodiment of the present application, a water outlet control method for a water purifier is provided, wherein the water purifier includes a hot water control device, a cold water control device, a proportional adjustment device and a heating device, the proportional adjustment device is arranged between the intersection water outlet of the hot water control device and the cold water control device and the water outlet of the water purifier, and the heating device is arranged between the proportional adjustment device and the water outlet of the water purifier, and the water outlet control method includes: obtaining a target water outlet temperature and a target water outlet flow rate; taking a preset heating power according to the heating device, obtaining a predicted value of the intersection water temperature in the proportional adjustment device; determining an initial water production ratio of the hot water control device and the cold water control device based on the predicted value of the intersection water temperature; when the actual water outlet temperature reaches stability, obtaining the actual heating power of the heating device when water is produced at the initial water production ratio; adjusting the initial water production ratio based on the actual heating power and the preset heating power, so that the actual heating power approaches the preset heating power.

[0006] Optionally, adjusting the initial water production ratio based on the actual heating power and the preset heating power includes: determining whether the actual heating power is less than the preset heating power; when the actual heating power is less than the preset heating power, increasing the water production ratio of the cold water control device until the actual heating power reaches the preset heating power, or until the cold water control device is turned on alone and the hot water control device is turned off.

[0007] Optionally, increasing the water production ratio of the cold water control device includes: lowering the intersection water temperature in the ratio adjustment device according to a first preset gradient; determining the water production ratio of the cold water control device and the hot water control device and the actual heating power of the heating device based on the lowered intersection water temperature, until the actual heating power reaches the preset heating power and the actual water outlet temperature reaches the target water outlet temperature.

[0008] Optionally, when the lowered intersection water temperature reaches the cold water inlet temperature of the cold water control device, the cold water control device is turned on alone, the hot water control device is turned off, and the actual heating power of the heating device is adjusted based on the cold water temperature until the actual water outlet temperature reaches the target water outlet temperature.

[0009] Optionally, when the actual heating power is equal to the preset heating power, it is determined whether the actual water outlet temperature is lower than the target water outlet temperature; when the actual water outlet temperature is lower than the target water outlet temperature, the water production ratio of the hot water control device is increased until the actual water outlet temperature reaches the target water outlet temperature, or until the hot water control device is turned on alone and the cold water control device is turned off.

[0010] Optionally, increasing the water production ratio of the hot water control device includes: increasing the intersection water temperature in the ratio adjustment device according to a second preset gradient until the actual outlet water temperature is equal to the target outlet water temperature.

[0011] Optionally, when the increased intersection water temperature reaches the hot water inlet temperature of the hot water control device, the hot water control device is turned on separately, the cold water control device is turned off, and the flow of the hot water control device is adjusted based on the target outlet water temperature until the actual outlet water temperature reaches the target outlet water temperature.

[0012] Optionally, adjusting the initial water production ratio based on the actual heating power and the preset heating power includes: judging the temperature range in which the intersection water temperature prediction value is located, the temperature range at least including a first temperature preset range, a second temperature preset range and a third temperature preset range with temperature values ​​from high to low; when the intersection water temperature prediction value is in the first preset temperature range, closing the cold water control device according to the target water outlet flow rate, and opening the hot water control device; when the intersection water temperature prediction value is in the second preset temperature range, opening the cold water control device and the hot water control device at the same time according to the target water outlet flow rate; when the intersection water temperature prediction value is in the third preset temperature range, opening the cold water control device according to the target water outlet flow rate, and closing the hot water control device.

[0013] Optionally, simultaneously turning on the cold water control device and the hot water control device according to the target water outlet flow rate includes: obtaining a target water outlet volume; determining a first working power of the hot water control device based on the target water outlet temperature; determining a second working power of the cold water control device based on the target water outlet volume and the first working power; controlling the hot water control device to operate at the first working power, and controlling the cold water control device to operate at the second working power; wherein, when the hot water control device and the cold water control device are operating simultaneously, the water flow in the proportional adjustment device satisfies a preset relationship with the first working power and the second working power, and the preset relationship is determined based on the working power range and the maximum actual flow of the hot water control device and the cold water control device.

[0014] Optionally, when the hot water control device and the cold water control device work simultaneously, the maximum actual flow of the hot water control device is determined based on the flow of the cold water control device; and / or the maximum actual flow of the cold water control device is determined based on the flow of the hot water control device.

[0015] After obtaining the target water outlet temperature and target water outlet flow rate, the present application pre-sets the heating power in combination with the heating device. The preset heating power can be a heating power value that can ensure that the water purifier can continuously output water at a large flow rate and constant temperature according to the target temperature for a set time. The intersection water temperature prediction value under the preset heating power is calculated in the proportional adjustment device, and the initial water production ratio of the hot water outlet control device and the cold water outlet control device is determined based on the intersection water temperature prediction value. The water purifier is controlled according to the initial water production ratio, and the actual heating power of the heating device during actual operation is obtained. When the actual heating power does not match the preset heating power, the initial water production ratio can be adjusted to change the intersection water temperature value to change the actual heating power until the actual heating power is equal to the preset heating power. The present application can achieve the preset heating power by adjusting the initial water production ratio to ensure the preset large flow rate and constant temperature water outlet, and then achieve constant temperature and large flow water outlet according to the water outlet time required by the user.

[0016] Furthermore, the preset heating power can be the maximum heating power. When the actual heating power is less than the preset heating power, it indicates that the intersection water temperature in the proportional adjustment device is slightly higher. When the heating device heats the intersection water to the target water outlet temperature, the heating power does not reach the preset heating power, that is, the hot water usage ratio in the hot water control device is high, which is not conducive to the longest continuous large flow and constant temperature water outlet. At this time, the initial water production ratio can be adjusted to gradually reduce the intersection water temperature and reduce the hot water usage ratio in the hot water control device, so as to achieve the effect of gradually increasing the actual heating power of the heating device until the actual heating power is equal to the preset heating power. The present application can maximize the heating power by adjusting the initial water production ratio, and try to enable the heating device to achieve the longest continuous water outlet at a constant temperature and large flow rate at the maximum heating power.

[0017] Furthermore, when the actual heating power is equal to the preset heating power, it is also necessary to ensure that the actual water outlet temperature is equal to the target water outlet temperature. When the actual water outlet temperature is lower than the target water outlet temperature, it can be determined that the junction water temperature is too low at this time. The water production ratio of the hot water control device can be increased until the actual water outlet temperature reaches the target water outlet temperature, or the water production ratio of the cold water control device can be reduced until the actual water outlet temperature reaches the target water outlet temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 This is a flow chart of an optional water outlet control method for a water purifier according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of an optional cold water control device only discharging water according to an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of an optional hot water-only control device discharging water according to an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of an optional cold and hot water co-discharging method according to an embodiment of the present application;

[0024] Figure 5 This is a structural block diagram of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] According to one aspect of the present application, a water outlet control method for a water purifier is proposed. The water purifier includes a hot water control device, a cold water control device, a proportional adjustment device, and a heating device. The proportional adjustment device is arranged between the intersection of the hot water control device and the cold water control device and the water outlet of the water purifier. The heating device is arranged between the proportional adjustment device and the water outlet of the water purifier. The water outlet control method includes:

[0028] S10. Obtain target outlet water temperature and target outlet water flow rate.

[0029] The user can set the water outlet temperature, water outlet flow rate and other required information through the operation panel on the water purifier. After receiving the user's required information, the controller decodes the information to obtain the target water outlet temperature and target water outlet flow rate, and controls the water outlet device of the water purifier based on the target water outlet temperature and target water outlet flow rate.

[0030] S20. According to the preset heating power of the heating device, a predicted value of the intersection water temperature in the proportional adjustment device is obtained.

[0031] After obtaining the target water outlet temperature and target water outlet flow rate, the heating device is controlled to heat based on the pre-set heating power, and the intersection water temperature prediction value in the proportional adjustment device can be calculated, that is, the intersection water with a temperature value of the intersection water temperature prediction value ensures that the water outlet temperature value is equal to the target water outlet temperature after passing through the heating device and the water purifier outlet.

[0032] Specifically, the temperature of the intersecting water is heated to the target outlet water temperature. According to the specific heat capacity formula and Joule's law, equation (1) can be obtained:

[0033] cm(T 目标 -T 交汇 )=ηPt1 (1)

[0034] Where c is the specific heat capacity of the interaction water, m is the mass of the intersection water, T 目标 is the target outlet water temperature, T 交汇 is the intersection water temperature, η is the heating efficiency, P is the preset heating power, and t1 is the heating time. According to the flow rate and mass formula, see formula (2):

[0035] m=S 设定 *ρ*t2 (2)

[0036] Among them, S 设定is the target water outlet flow rate, ρ is the density of water, and t2 is the time the water flows. Since the water in the water purifier is heated while the intersecting water is flowing, t1 in formula (1) is equal to t2 in formula (2). The density of water is 1 g / ml, and the heating efficiency can be a constant close to 1. Since this application considers maximizing the utilization of the heating power of the heating device, the heating power is taken as 1. The specific heat capacity of water is 4.2 J / (ml*℃). Substituting formula (2) into formula (1) yields formula (3):

[0037] T 交汇 =T 目标 -P / (S 设定 *4.2) (3)

[0038] Therefore, after the target outlet water temperature and target outlet water flow rate are known, the temperature value of the intersection water can be predicted.

[0039] In this embodiment, the preset heating power can be the maximum power of the heating device, or it can be another pre-set heating power. In this embodiment, the preset heating power can be determined based on the target water outlet temperature, target water outlet flow rate, and the user's target water intake. That is, after the water intake is determined, under the preset heating power, it can be ensured that the water purifier meets the user's target water intake by discharging water at a constant temperature and high flow rate during the water intake process. In this embodiment, the greater the preset power, the less hot water is consumed by the hot water control device, and the longer the duration of continuous high-flow water outlet.

[0040] S30. Determine the initial water production ratio of the hot water control device and the cold water control device based on the predicted value of the intersection water temperature.

[0041] After obtaining the predicted value of the intersection water temperature, the ratio of cold water and hot water that can reach the predicted value of the intersection water temperature can be determined based on the cold water temperature value and the hot water temperature value. The initial water production ratio of the hot water control device and the cold water control device can be determined, and the operation of the water purifier can be controlled according to the initial water production ratio.

[0042] S40. When the actual outlet water temperature reaches stability, obtain the actual heating power of the heating device when producing water at the initial water production ratio.

[0043] For a water purifier that operates according to an initial water production ratio, when the generated intermixed water passes through a heating device in a ratio regulating device, the heating device will adjust the preset heating power so that the actual outlet water temperature matches the target outlet water temperature. For example, PI regulation or PID regulation can be used to obtain the actual heating power of the heating device after the actual outlet water temperature stabilizes. In this embodiment, the actual outlet water temperature is stable, which means that the actual outlet water temperature is equal to the target temperature. In some optional embodiments, during the actual water outlet process, the actual outlet water temperature may not be equal to the target outlet water temperature. Therefore, if the actual outlet water temperature fluctuates around the target outlet water temperature, it can be considered that the actual outlet water temperature has reached the target temperature. For example, if the actual outlet water temperature fluctuates within a fluctuation range of ±2°C, ±3°C, or the like, the actual outlet water temperature is considered to be stable and has reached the target outlet water temperature.

[0044] In this embodiment, the lower the water temperature before passing through the heating device, that is, the lower the intersection water temperature, the greater the heating power will be through PI regulation or PID regulation. The greater the flow rate of water through the heating device, the greater the heating power will be.

[0045] S50. Adjust the initial water production ratio based on the actual heating power and the preset heating power, so that the actual heating power approaches the preset heating power.

[0046] After obtaining the target outlet water temperature and target outlet water flow rate, the present application calculates the predicted value of the intersection water temperature under the preset heating power in the proportional adjustment device in combination with the preset heating power of the heating device and the target outlet water temperature, determines the initial water production ratio of the hot water control device and the cold water control device based on the predicted value of the intersection water temperature, controls the operation of the water purifier according to the initial water production ratio, and obtains the actual heating power of the heating device during actual operation when the actual outlet water temperature reaches stability. When the actual heating power does not match the preset heating power, it is considered that the heating power of the heating device can still be adjusted, and the initial water production ratio can be adjusted to change the intersection water temperature value to change the actual heating power until the actual heating power is equal to the preset heating power. With such a setting, the heating power of the heating device is optimized on the basis of ensuring the target outlet water temperature and target outlet water flow rate, so that the heating power is as close to the preset heating power as possible, thereby ensuring that the water purifier can continuously discharge water at a large flow rate and constant temperature. This application adjusts the initial water production ratio to bring the actual heating power of the heating device close to the preset heating power, ensuring the preset large-flow constant-temperature water output, and thus achieving constant-temperature and large-flow water output according to the water output time required by the user.

[0047] The preset heating power can be the maximum heating power. When the actual heating power is less than the preset heating power, it indicates that the intersection water temperature in the proportional adjustment device can be further reduced. When the heating device heats the intersection water to the target water outlet temperature, the heating power is not maximized, that is, the hot water usage ratio in the hot water control device is high, which is not conducive to long-term continuous large-flow constant-temperature water outlet. At this time, the initial water production ratio can be adjusted to gradually reduce the intersection water temperature and reduce the hot water usage ratio in the hot water control device to achieve the effect of gradually increasing the actual heating power of the heating device until the actual heating power is equal to the preset heating power. On the basis of meeting the target water outlet temperature and target water outlet flow rate, the present application can maximize the heating power by adjusting the initial water production ratio, and try to enable the heating device to achieve the longest time of continuous water outlet at a constant temperature and large flow rate at the maximum heating power. Since the amount of hot water stored in the hot water control device is limited, in order to maximize the duration of high-flow constant-temperature water output, the preset heating power can be set to the maximum heating power. Of course, in order to meet the diverse needs of users or for the purpose of energy saving, the heating power of the heating device can be determined based on the high-flow constant-temperature water output duration required by the user. In this embodiment, the longer the required time, the greater the heating power.

[0048] For example, when the actual heating power is less than the preset heating power and the water production ratio is adjusted, the heating power difference between the actual heating power and the preset heating power and the current water production ratio can be obtained, and the water production ratio adjustment amount is determined based on the water production ratio and the heating power difference; the water production ratio is adjusted according to the ratio adjustment amount; wherein, different water production ratios and different heating power differences correspond to different adjustable temperature values.

[0049] The water production ratio adjustment amount may be determined based on the actual water production ratio and the power difference in the following manner:

[0050] Obtain the preset ratio range of the current water production ratio, wherein the same ratio adjustment value corresponds to different temperature adjustment values ​​in different water production ratio ranges;

[0051] A proportional adjustment amount is determined based on the adjustable temperature value corresponding to the power difference and the preset proportional interval, so that the actual heating power approaches the target heating power and the actual water outlet temperature approaches the target water outlet temperature.

[0052] The temperature range of cold water is 20℃-35℃, the temperature range of hot water is 50℃-95℃, and the water production ratio of hot water to cold water is 1:4 to 4:1.

[0053] Example description:

[0054] In this embodiment, the preset ratio intervals are divided according to the ratio. For example, the preset ratio intervals of hot water to cold water are: a first preset ratio interval of 1:1-1:2; a second preset ratio interval of 1:2-1:3; and a third preset ratio interval of 1:3-1:4. In different preset ratio intervals, when adjusting according to the preset ratio adjustment amount, the temperature change amount varies.

[0055] For example, if the cold water ratio increases by 0.2, within the first preset ratio range, the temperature changes by approximately 2.5°C. Within the second preset ratio range, the temperature changes by approximately 1°C. Within the third preset ratio range, the temperature changes by approximately 0.5°C. As the cold water ratio increases, the same ratio adjustment amount results in a smaller temperature variation.

[0056] For example, taking the cold water temperature as 30°C and the hot water temperature as 80°C as an example, refer to the three preset ratio intervals listed in Tables 1-1 to 1-3:

[0057] Table 1-1: First preset ratio range

[0058]

[0059] Table 1-2: Second preset ratio range

[0060]

[0061] Table 1-3: The third preset ratio range

[0062]

[0063] Regarding the relationship between heating power and temperature change: For example, at a preset flow rate, each increase or decrease in heating power will correspond to a fixed temperature change. For example, at a preset flow rate, a 200W decrease in heating power will result in a 2.5°C change in the actual outlet water temperature.

[0064] To keep the actual outlet water temperature stable and close to the target outlet water temperature, if the actual heating power is less than the preset heating power, the heating power must be increased to adjust the actual heating power to the preset heating power. At the same time, the water production ratio must be adjusted according to the temperature change corresponding to the increased heating power to keep the actual outlet water temperature close to the target outlet water temperature.

[0065] Therefore, the temperature variation amount that needs to be adjusted by the water production ratio can be determined based on the temperature variation amount corresponding to the power difference between the actual heating power and the preset heating power.

[0066] In different preset ratio intervals, the same ratio change corresponds to different temperature changes. Therefore, after obtaining the temperature change, it is necessary to determine the ratio adjustment amount based on the preset ratio interval in which the current water production ratio is located.

[0067] The following example uses the difference between the actual power and the preset power as 200W, and the corresponding temperature change as 2°C:

[0068] If the current water production ratio is within the first preset ratio range (see Table 1-1), the ratio adjustment is to increase the cold water ratio by 0.2. For example, if the hot water to cold water ratio was 1:1.2 before the adjustment, the hot water to cold water ratio will be 1:1.4 after the adjustment. This ensures that the actual heating power is roughly equal to the preset heating power, and the actual water outlet temperature is equal to the target water outlet temperature.

[0069] If the current water production ratio is within the second range (see Table 1-2), the ratio adjustment is to increase the cold water ratio by 0.5. For example, if the hot water to cold water ratio was 1:2 before the adjustment, the hot water to cold water ratio will be 1:2.5 after the adjustment. This ensures that the actual heating power is roughly equal to the preset heating power, and the actual water outlet temperature is equal to the target water outlet temperature.

[0070] If the current water production ratio is within the third range (see Table 1-3), the ratio adjustment is to increase the cold water ratio by 1. For example, if the hot water to cold water ratio was 1:3 before the adjustment, the hot water to cold water ratio will be 1:4 after the adjustment. This ensures that the actual heating power is roughly equal to the preset heating power, and the actual water outlet temperature is equal to the target water outlet temperature.

[0071] In this embodiment, the correspondence between the heating power variation and the temperature variation is not limited to the above embodiment, where a heating power variation of 200 W corresponds to a temperature variation of 2.5°C. Other correspondences can also be determined based on the flow rate. For example, at a flow rate of 1.5 L / min, a heating power variation of 200 W corresponds to a temperature variation of 2°C. The correspondence between the heating power variation and the temperature variation may change as the flow rate changes.

[0072] In this embodiment, the preset heating power is taken as the maximum heating power of the heating device as an example for explanation:

[0073] On the basis of meeting the target water outlet temperature and target water outlet flow rate, when the actual heating power is less than the preset heating power, it may be because the intersection water temperature generated when the water purifier works according to the initial water production ratio is too high. When the intersection water temperature is too high, if the heating device heats with the preset heating power, the intersection water temperature after heating will be higher than the target water outlet temperature.

[0074] In order to ensure that the heating power of the heating device is as high as possible and to meet the target outlet water temperature, the initial water production ratio can be adjusted, that is, the water production ratio of the hot water control device and the water production ratio of the cold water control device can be adjusted. Exemplarily, adjusting the initial water production ratio based on the actual heating power and the preset heating power includes: determining whether the actual heating power is less than the preset heating power; when the actual heating power is less than the preset heating power, increasing the water production ratio of the cold water control device until the actual heating power reaches the preset heating power, or until the cold water control device is turned on alone and the hot water control device is turned off. In this embodiment, when the actual heating power is less than the preset heating power, it indicates that the junction water temperature in the ratio adjustment device is slightly higher, and when the heating device heats the junction water to the target outlet water temperature, the heating power does not reach the preset heating power. In this case, the initial water production ratio can be adjusted, which can be to increase the water production ratio of the cold water control device to gradually reduce the junction water temperature, so as to achieve the effect of gradually increasing the actual heating power of the heating device until the actual heating power equals the preset heating power. When increasing the water production ratio of the cold water control device, if the actual heating power is slightly different from the preset heating power, then if the water production ratio of the cold water control device is increased, even if the heating power of the heating device has reached the preset heating power, the intersection water temperature after heating may be lower than the target water outlet temperature. That is, the water production ratio of the cold water control device increased at this time is too large. Therefore, a preset gradient can be set to gradually adjust the water production ratio of the cold water control device until the actual heating power is equal to the preset heating power.

[0075] As an exemplary embodiment, increasing the water production ratio of the cold water control device includes: reducing the intersection water temperature in the ratio adjustment device according to a first preset gradient; and determining the water production ratio of the cold water control device and the hot water control device and the actual heating power of the heating device based on the reduced intersection water temperature, until the actual heating power reaches the preset heating power and the actual outlet water temperature reaches the target outlet water temperature. In this embodiment, reducing the intersection water temperature in the ratio adjustment device according to the first preset gradient is equivalent to gradually increasing the water production ratio of the cold water control device. To ensure that the outlet flow rate of the intersection water meets the target outlet flow rate, the water production ratio of the hot water control device is adjusted simultaneously with the water production ratio of the cold water control device. After the water production ratio adjustment is completed, the water purifier is controlled to operate and the actual heating power is detected. If the actual heating power still does not reach the preset heating power, the intersection water temperature is further reduced according to the first preset gradient, and the water production ratio of the cold water control device and the hot water control device are further adjusted until the actual heating power reaches the preset heating power, thereby ensuring that the heating power of the heating device is at its maximum value and water is discharged at a constant temperature and in a constant quantity.

[0076] Optionally, the first preset gradient may be 1°C-5°C. In this embodiment, the intersection water temperature may be adjusted with a gradient of 1°C or 2°C.

[0077] As the water production ratio of the cold water control device increases, the actual heating power also gradually increases. When the proportion adjustment unit is filled with cold water, that is, when the cold water control device is turned on alone and the hot water control device is turned off, the actual heating power is still less than the preset heating power, and water can be discharged according to the current water discharge method. Of course, the flow rate of the cold water control device can also be increased to further increase the actual heating power.

[0078] For example, in actual use, the target water outlet temperature set by the user may be lower. Therefore, when the intersection water temperature is gradually lowered, if the intersection water temperature is equal to the cold water inlet temperature of the cold water control device, the cold water control device is turned on separately and the hot water control device is turned off. In addition, the actual heating power needs to be adjusted in combination with the target water outlet temperature to ensure the constant temperature and constant quantity water outlet effect of the water purifier. When the water purifier is operating, the operating power of the chilled water control device is determined based on the target water outlet flow rate. After the chilled water control device starts operating, the actual heating power of the heating device is determined based on the target water outlet temperature and the water inlet temperature of the chilled water control device in combination with PID regulation. When the actual heating power reaches the preset heating power, if the actual water outlet temperature is equal to the target water outlet temperature, the water purifier can operate in the current state. If the actual water outlet temperature is lower than the target water outlet temperature, it indicates that the water inlet temperature of the chilled water control device is too low. In other words, even with the maximum heating power, the target water outlet temperature cannot be achieved when water is discharged only through the chilled water control device. In this case, the water temperature in the proportional control device needs to be increased to enter a state where cold water and hot water meet. When the temperature of the mixed water is increased to a temperature that just meets the outlet water temperature and the full heating power, water is continuously discharged. This is the final stable water discharge state. If the heating power of the heating device does not reach the preset heating power, that is, when it is at its maximum, it indicates that the target water outlet temperature set by the user is too low. In this case, the water purifier is not controlled and water is continued to be discharged in this state. When the actual heating power of the heating device is equal to the preset heating power, it is also necessary to ensure that the actual water outlet temperature is equal to the target water outlet temperature. If the actual water outlet temperature is lower than the target water outlet temperature, it indicates that the intersection water temperature gathered in the proportional adjustment device is low. At this time, the water production ratio of the hot water control device should be increased.

[0079] When the actual heating power is equal to the preset heating power, determine whether the actual water outlet temperature is lower than the target water outlet temperature; when the actual water outlet temperature is lower than the target water outlet temperature, increase the water production ratio of the hot water control device until the actual water outlet temperature reaches the target water outlet temperature, or until the hot water control device is turned on alone and the cold water control device is turned off.

[0080] For example, when the actual outlet water temperature is lower than the target outlet water temperature, the water production ratio can be adjusted as follows:

[0081] Obtain the preset water production ratio range in which the current water production ratio is located, wherein the same ratio adjustment amount corresponds to different temperature adjustment values ​​in different water production ratio ranges;

[0082] Calculate the temperature difference between the actual outlet water temperature and the target outlet water temperature;

[0083] Determining a ratio adjustment amount based on the temperature difference and a preset water production ratio interval in which the current water production ratio is located;

[0084] The water production ratio is adjusted according to the ratio adjustment amount.

[0085] The temperature range of cold water is 20℃-35℃, the temperature range of hot water is 50℃-95℃, and the water production ratio of hot water to cold water is 1:4 to 4:1.

[0086] Example description:

[0087] In this embodiment, the preset ratio intervals are divided according to the ratio. For example, the preset ratio intervals of cold water to hot water are 1:1-1:2, the fifth preset ratio interval is 1:2-1:3, and the sixth preset ratio interval is 1:3-1:4. In different preset ratio intervals, when adjusting according to the preset ratio adjustment amount, the temperature change amount varies.

[0088] For example, taking a 0.2 increase in the hot water ratio as an example, within the fourth preset ratio range, the temperature change is approximately 2°C. Within the fifth preset ratio range, the temperature change is approximately 1°C. Within the sixth preset ratio range, the temperature change is approximately 0.5°C. As the hot water ratio increases, the temperature change corresponding to the same ratio adjustment decreases.

[0089] For example, taking the cold water temperature as 30°C and the hot water temperature as 80°C as an example, refer to the three preset ratio intervals listed in Table 2-1 to Table 2-3:

[0090] Table 2-1: The fourth preset ratio range

[0091]

[0092] Table 2-2: Fifth preset ratio range

[0093]

[0094] Table 2-3: Sixth preset ratio range

[0095]

[0096] After the actual heating power is equal to the preset heating power, if the actual water outlet temperature is lower than the target water outlet temperature, the junction water temperature is too low. Therefore, the water production ratio can be adjusted based on the temperature difference between the actual water outlet temperature and the target water outlet temperature.

[0097] In different preset ratio intervals, the same ratio change corresponds to different temperature change amounts. Therefore, after obtaining the temperature change amount, it is necessary to determine the ratio adjustment amount based on the preset ratio interval in which the current water production ratio is located.

[0098] The following example uses the temperature difference between the actual outlet water temperature and the target outlet water temperature as 2°C, and the water production ratio range as shown in Table 2-1, value 2-3:

[0099] If the current water production ratio is within the fourth preset ratio range (see Table 2-1), the ratio adjustment is to increase the hot water ratio by 0.2. For example, if the cold water to hot water ratio was 1:1.2 before the adjustment, the cold water to hot water ratio will be 1:1.4 after the adjustment. This ensures that the actual heating power is roughly equal to the preset heating power, and the actual water outlet temperature is equal to the target water outlet temperature.

[0100] If the current water production ratio is within the fifth preset ratio range (see Table 2-2), the ratio adjustment is to increase the hot water ratio by 0.5. For example, if the cold water to hot water ratio was 1:2 before the adjustment, the cold water to hot water ratio will be 1:2.5 after the adjustment. This ensures that the actual heating power is roughly equal to the preset heating power and the actual water outlet temperature is equal to the target water outlet temperature.

[0101] If the current water production ratio is within the sixth preset ratio range (see Table 2-3), the ratio adjustment is to increase the hot water ratio by 0.5. For example, if the cold water to hot water ratio was 1:3 before the adjustment, the cold water to hot water ratio will be 1:3.5 after the adjustment. This ensures that the actual heating power is substantially equal to the preset heating power, and the actual water outlet temperature is equal to the target water outlet temperature.

[0102] In this embodiment, the change in the intersecting water temperature is also related to the initial temperatures of the cold and hot water. Different initial temperatures of the cold and hot water correspond to different temperature changes corresponding to the preset proportional adjustment amount. The above embodiment is merely illustrative and does not represent all embodiments. Other intersecting water temperature changes composed of initial cold and hot water temperatures are also applicable to this embodiment.

[0103] In this embodiment, when the actual heating power is equal to the preset heating power, it is also necessary to ensure that the actual water outlet temperature is equal to the target water outlet temperature. If the actual water outlet temperature is lower than the target water outlet temperature, it indicates that the temperature of the intersection water gathered in the proportional adjustment device is lower. At this time, the water production ratio of the hot water control device should be increased until the actual water outlet temperature reaches the target water outlet temperature. If the target water outlet temperature is higher, in the process of gradually increasing the water production ratio of the hot water control device, it may appear that the intersection water is composed only of hot water flowing out of the water outlet of the hot water control device. At this time, the hot water control device is controlled to be turned on separately, and the cold water control device is turned off.

[0104] When increasing the water production ratio of the hot water control device, similar to increasing the water production ratio of the cold water control device, it can be achieved by adjusting the intersection water temperature. The intersection water temperature in the ratio adjustment device can be gradually increased according to the second preset gradient. When increasing the intersection water temperature, the water production ratio of the hot water control device can be increased. Under the condition that the flow rate of the intersection water is equal to the target water outlet flow rate, the water production ratio of the corresponding cold water control device may need to be reduced and adjusted to ensure that the water outlet of the final water purifier is constant in temperature and quantity to meet the user's set requirements. When only the hot water control device is required to output water, the working power of the hot water control device is first determined according to the target water outlet flow rate, and the heating power of the heating device is determined by PID adjustment based on the target water outlet temperature and the water outlet temperature of the hot water control device. During operation, if the actual heating power of the heating device is equal to the preset heating power, and the water temperature after heating in the ratio adjustment device is equal to the target water outlet temperature, the water purifier can be controlled to continue operating according to the current state; when the water temperature after heating in the ratio adjustment device is lower than the target water outlet temperature, in order to meet the target water outlet temperature requirement set by the user, the flow rate of the hot water control device needs to be reduced.

[0105] Optionally, the second preset gradient may be 1°C-5°C. In this embodiment, the intersection water temperature may be adjusted with a gradient of 1°C or 2°C.

[0106] As an exemplary embodiment, the initial water production ratio can be described as the ratio of cold water being [0-1], or it can also be described as the ratio of hot water being [0-1]. The outlet water production ratio can be determined by the intersection water temperature prediction value in the ratio adjustment device under the preset heating power of the heating device, that is, under the preset heating power, when the target outlet water temperature is reached, the minimum intersection water temperature prediction value is used as the basis for determining the initial water production ratio. For example, with the preset heating power as the maximum heating power, the minimum temperature required to be reached by the ratio adjustment unit (under a certain outlet water flow rate) is determined according to the maximum heating power of the heating device. Then, the minimum temperature and the temperature in the hot tank are judged. First, it is judged whether the temperature in the tank is less than the minimum temperature. If so, when the required outlet water temperature is higher than the temperature in the tank, only hot water is turned on; then, it is judged whether the heating device is at the maximum heating power. If not, it can be considered to add cold water to perform a cold and hot ratio adjustment scheme. If so, only hot water is output. Then determine whether the cold water temperature is greater than the above-mentioned minimum temperature (the predicted value of the intersection water temperature). If so, only cold water is needed. If the cold water temperature is less than the minimum temperature, the proportion of cold and hot water needs to be adjusted.

[0107] Specifically, the adjustment of the initial water production ratio based on the actual heating power and the preset heating power includes: judging the temperature range in which the intersection water temperature prediction value is located, the temperature range at least including a first temperature preset range, a second temperature preset range and a third temperature preset range with temperature values ​​from high to low; when the intersection water temperature prediction value is in the first preset temperature range, closing the cold water control device according to the target water outlet flow rate, and opening the hot water control device; when the intersection water temperature prediction value is in the second preset temperature range, opening the cold water control device and the hot water control device at the same time according to the target water outlet flow rate; when the intersection water temperature prediction value is in the third preset temperature range, opening the cold water control device according to the target water outlet flow rate, and closing the hot water control device.

[0108] In this embodiment, the proportion of the hot water control device and the cold water control device in the initial water production ratio can be preliminarily determined by the temperature range of the intersection water temperature prediction value.

[0109] Since the heating device uses a preset heating power, i.e., the maximum heating power, the lowest value of the intersection water temperature in the proportional adjustment device can be deduced based on the target water outlet temperature, which is the intersection water temperature prediction value in this application. Then, the initial water stop ratio is determined based on the relationship between the temperature in the hot water control device and the intersection water temperature prediction value. The preliminary judgment method is as follows:

[0110] When the predicted value of the intersection water temperature is greater than or equal to the water temperature at the water outlet of the hot water control device, only the hot water control device is controlled to work and the cold water control device stops working; when the predicted value of the intersection water temperature is between the water temperature at the water outlet of the cold water control device and the water temperature at the water outlet of the hot water control device, the cold water control device and the hot water control device are controlled to work at the same time; when the predicted value of the intersection water temperature is less than or equal to the water temperature at the water outlet of the cold water control device, only the cold water control device is controlled to work and the hot water control device does not work.

[0111] It is understandable that the water temperature in the hot water control device is variable. For example, during certain time periods or certain user operations, the water temperature in the hot water control device is fixed at a certain temperature value, while during other time periods or other operations, the water temperature in the hot water control device changes to another temperature value. The water temperature in the hot water control device can be achieved by building a circulation pipeline or a return pipeline between the hot water control device and the instant heating body. The following introduces the water output control method of the water purifier based on the three situations of the initial water production ratio being hot water alone, the intersection of cold water and hot water, and cold water alone:

[0112] See also Figure 2 As shown, when it is preliminarily determined that only the cold water control device is discharging water according to the above judgment method, the working power of the cold water control device is determined according to the target water outlet flow rate, and the actual heating power of the heating device is determined according to the target water outlet temperature. When the actual water outlet temperature reaches stability, check whether the actual water outlet temperature reaches the target water outlet temperature. If the actual water outlet temperature reaches the target water outlet temperature, the water purifier can use the current state to discharge water. If the actual water outlet temperature does not reach the target water outlet temperature, check the actual heating power of the heating device. If the actual heating power does not reach the preset heating power, increase the actual heating power until the actual water outlet temperature is equal to the target water outlet temperature, and the water purifier can maintain the current water outlet state to discharge water. If the actual heating power has reached the preset heating power, it means that the water temperature of the cold water control device is too low, and the water outlet of the heating device and the cold water control device alone cannot reach the target temperature, then consider using the hot water control device and the cold water control device to work simultaneously to discharge water.

[0113] See also Figure 3As shown, when the above determination method preliminarily determines that only the hot water control device is discharging water, the operating power of the hot water control device is first determined based on the target water outlet flow rate, and the actual heating power of the heating device is determined based on the target water outlet temperature. When the actual water outlet temperature stabilizes, the relationship between the actual water outlet temperature and the target water outlet temperature is checked. If the actual water outlet temperature is equal to the target water outlet temperature, the actual heating power of the heating device is checked. If the actual heating power does not reach the preset heating power, consider increasing the cold water supply and adjusting the water outlet mode so that the hot water control device and the cold water control device operate simultaneously. If the actual heating power reaches the preset heating power, the water purifier uses the hot water control device to discharge water. If the actual water outlet temperature is lower than the target water outlet temperature, the actual heating power of the heating device is checked to see if it reaches the preset heating power. If not, the actual heating power is increased until the actual water outlet temperature reaches the target water outlet temperature. The water purifier then maintains the current water outlet mode. If the preset heating power is reached, this indicates that even at maximum heating power, the hot water control device alone cannot reach the target temperature. In this case, the flow rate of the hot water control device should be reduced until the target water outlet temperature is reached.

[0114] See also Figure 4As shown, when it is preliminarily determined that hot and cold water are flowing out at the intersection according to the above judgment method, the working power of the cold water control device and the hot water control device, as well as the actual heating power of the heating device are first determined according to the target water outlet flow rate and the target water outlet temperature and PID adjustment. After the water purifier is working, it is judged whether the actual heating power is equal to the preset heating power. When the actual heating power is not equal to the preset heating power, it means that the intersection water temperature is too high and the intersection water temperature needs to be lowered, that is, the water production ratio of the cold water control device is increased. In the process of adjusting the intersection water temperature, when the intersection water temperature is less than or equal to the cold water temperature, only the cold water control device is controlled to work, and the hot water control device does not work; when the intersection water temperature is greater than the cold water temperature, it is judged whether the actual heating power is equal to the preset heating power. When the actual heating power is equal to the preset heating power, the water purifier discharges water according to the current state. When the actual heating power is not equal to the preset heating power, the intersection water temperature continues to be lowered. After determining the actual heating power of the heating device based on the target water outlet flow rate and the target water outlet temperature, if the actual heating power is equal to the preset heating power, it is determined whether the intersection water temperature after heating is equal to the target water outlet temperature. If the intersection water temperature after heating is equal to the target water outlet temperature, the water purifier is controlled to discharge water according to the current state. If the intersection water temperature after heating is less than the target water outlet temperature, it indicates that the intersection water temperature is too low and needs to be increased, that is, the water production ratio of the hot water control device is increased. It is then determined again whether the actual heating power after adjusting the water production ratio of the hot water control device is equal to the preset heating power. If the actual heating power is equal to the preset heating power, the water purifier is controlled to discharge water according to the current state. If the actual heating power is not equal to the preset heating power, the water production ratio of the hot water control device is further increased until the actual heating power is equal to the preset heating power. During the process of increasing the water production ratio of the hot water control device, if the water temperature in the ratio adjustment device is equal to the hot water temperature of the hot water control device, water is determined to be discharged only through the hot water control device, thereby ensuring that the water purifier discharges water at a constant temperature for a long time when the heating power utilization is maximized.

[0115] As an exemplary embodiment, simultaneously turning on the cold water control device and the hot water control device according to the target water outlet flow rate includes: obtaining a target water outlet volume; determining a first working power of the hot water control device based on the target water outlet temperature; determining a second working power of the cold water control device based on the target water outlet volume and the first working power; controlling the hot water control device to operate at the first working power, and controlling the cold water control device to operate at the second working power; wherein, when the hot water control device and the cold water control device are operating simultaneously, the water flow in the proportional adjustment device satisfies a preset relationship with the first working power and the second working power, and the preset relationship is determined based on the working power range and the maximum actual flow of the hot water control device and the cold water control device.

[0116] In this embodiment, the first working power of the hot water control device can be determined by the target water outlet temperature and PID adjustment, and the water output of the hot water control device is determined by the first working power. The water output of the cold water control device can be determined in combination with the target water output, and then the second working power of the cold water control device is determined. By controlling the working power of the hot water control device and the cold water control device, the water flow of the flow control device can be controlled, and then the ratio of hot water and cold water can be adjusted to mix water of different temperatures.

[0117] When the cold water control device and the hot water control device operate simultaneously, due to the mutual influence, there is an error in the control of the flow rate. The inventors have found that when the two control devices operate simultaneously, they have different mutual influences at different working powers, and the maximum actual flow rates of the two control devices are also different from the theoretical maximum flow rates due to the mutual influence. Therefore, in this application, it is defined that when the hot water control device and the cold water control device operate simultaneously, the water flow rate in the proportional control device and the first working power and the second working power meet a preset relationship, and the preset relationship is determined based on the working power range of the hot water control device and the cold water control device and the maximum actual flow rate. Under the above preset relationship, a target water outlet temperature and a target water outlet are obtained, and the second working power of the cold water control device is determined based on the target water outlet and the first working power; the hot water control device is controlled to operate at the first working power, and the cold water control device is controlled to operate at the second working power, and the first working power and the second working power are limited to the working power range. The actual maximum flow rate is used according to the preset relationship, and the first working power and the second working power are controlled according to the target water outlet as the water flow rate in the proportional control device to achieve accurate flow calculation, thereby achieving accurate temperature control and accurate quantitative water outlet at the maximum flow rate.

[0118] As an optional embodiment, when the hot water control device and the cold water control device are operating simultaneously, the maximum actual flow rate of the hot water control device is determined based on the flow rate of the cold water control device; and / or the maximum actual flow rate of the cold water control device is determined based on the flow rate of the hot water control device. In this embodiment, the actual flow rates of the hot water control device and the cold water control device can be determined based on the flow rate of the other, and when calculating the water flow rate in the proportional control device, the calculated actual flow rate and operating power are used. This ensures the accuracy of the water flow calculation in the proportional control device.

[0119] The water flow in the proportional regulating device satisfies a preset relationship with the first working power and the second working power, and can satisfy the following relationship:

[0120] When the power of the hot water control device and the cold water control device are within a preset range, the actual water output of the hot water control device is VA, the actual water output of the hot water control device is VB, and the water flow rate of the proportional control device V = VA + VB. The preset range includes the operating power range P1 of the hot water control device and the operating power range P2 of the cold water control device. If the rated power of the hot water control device is greater than the rated power of the cold water control device, then A ≤ P1 < B, C ≤ P2 ≤ D, where A is the minimum starting power of the hot water control device and B is the maximum operating power of the hot water control device; C is the minimum starting power of the cold water control device and D is the maximum operating power of the cold water control device.

[0121] As an exemplary embodiment, setting the operating power of the hot water pump to 25%-75% and the operating power of the cold water pump to 25%-100% best conforms to the linear relationship.

[0122] From the above embodiment, it can be seen that A and C can be 25% full power, which is the minimum starting power of the pump, B can be 75% full power, and D can be 100% full power. Therefore, 25% full power ≤ P1 < 75% full power, and 25% full power ≤ P2 ≤ 100% full power. When the water of the hot water control device and the cold water control device are turned on simultaneously and intersected, the hot water control device and the cold water control device need to have a minimum starting power. A and C are the minimum starting power of the pump. Since the water of the hot water control device and the cold water control device are simultaneously discharged and intersected, it will affect the actual water flow rate of the two control devices. If the rated power of the two control devices is also different, in the actual water flow, the control device with a higher actual water flow rate will inevitably generate a back pressure effect on the control device with a lower actual water flow rate. In order to reduce this back pressure effect and minimize the flow rate calculation error caused by the intersection of the two water streams, in the preset relationship of this application, the maximum operating power of the control device with a higher rated power is excluded from the operating power range of the control device. That is to say, the maximum operating power of a control device with a larger rated power does not include the rated power.

[0123] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM (Read-Only Memory, Read-Only Memory) / RAM (Random Access Memory, Random Access Memory), a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0124] According to another aspect of the embodiment of the present application, an electronic device for implementing the above-mentioned water purifier water outlet control method is also provided. The electronic device can be a server, a terminal, or a combination thereof.

[0125] Figure 5 is a structural block diagram of an optional electronic device according to an embodiment of the present application, such as Figure 5 As shown, it includes a processor 502, a communication interface 504, a memory 506 and a communication bus 508, wherein the processor 502, the communication interface 504 and the memory 506 communicate with each other through the communication bus 508, wherein,

[0126] Memory 506, for storing computer programs;

[0127] The processor 502 is configured to implement a water outlet control method for a water purifier when executing a computer program stored in the memory 506 .

[0128] Optionally, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0129] The communication interface is used for communication between the above electronic device and other devices.

[0130] The memory may include RAM, or may include non-volatile memory, such as at least one disk memory. Alternatively, the memory may also be at least one storage device located away from the aforementioned processor.

[0131] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0132] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0133] The above are merely embodiments of the present invention and are not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A water outlet control method for a water purifier, characterized in that: The water purifier includes a hot water control device, a cold water control device, a ratio adjustment device and a heating device. The ratio adjustment device is arranged between the intersection of the hot water control device and the cold water control device and the water outlet of the water purifier. The heating device is arranged between the ratio adjustment device and the water outlet of the water purifier. The water outlet control method includes: Obtain target outlet water temperature and target outlet water flow rate; According to the preset heating power of the heating device, a predicted value of the intersection water temperature in the proportional adjustment device is obtained; Determining the initial water production ratio of the hot water control device and the cold water control device based on the predicted value of the intersection water temperature; When the actual outlet water temperature reaches stability, obtaining the actual heating power of the heating device when producing water at the initial water production ratio; The initial water production ratio is adjusted based on the actual heating power and the preset heating power so that the actual heating power approaches the preset heating power.

2. The water outlet control method of a water purifier according to claim 1, characterized in that: The adjusting the initial water production ratio based on the actual heating power and the preset heating power includes: Determining whether the actual heating power is less than the preset heating power; When the actual heating power is less than the preset heating power, the water production ratio of the cold water control device is increased until the actual heating power reaches the preset heating power, or until the cold water control device is turned on alone and the hot water control device is turned off.

3. The water outlet control method of a water purifier according to claim 2, characterized in that: Increasing the water production ratio of the cold water control device includes: reducing the intersection water temperature in the proportional adjustment device according to a first preset gradient; The water production ratio of the cold water control device and the hot water control device and the actual heating power of the heating device are determined based on the lowered intersection water temperature, until the actual heating power reaches the preset heating power and the actual outlet water temperature reaches the target outlet water temperature.

4. The water outlet control method of a water purifier according to claim 3, characterized in that: When the lowered intersection water temperature reaches the cold water inlet temperature of the cold water control device, the cold water control device is turned on alone, the hot water control device is turned off, and the actual heating power of the heating device is adjusted based on the cold water temperature until the actual water outlet temperature reaches the target water outlet temperature.

5. The water outlet control method of a water purifier according to claim 2, characterized in that: When the actual heating power is equal to the preset heating power, Determine whether the actual outlet water temperature is lower than the target outlet water temperature; When the actual outlet water temperature is lower than the target outlet water temperature, the water production ratio of the hot water control device is increased until the actual outlet water temperature reaches the target outlet water temperature, or until the hot water control device is turned on alone and the cold water control device is turned off.

6. The water outlet control method of a water purifier according to claim 5, characterized in that: Increasing the water production ratio of the hot water control device includes: The intersection water temperature in the proportional adjustment device is increased according to a second preset gradient until the actual outlet water temperature is equal to the target outlet water temperature.

7. The water outlet control method of a water purifier according to claim 6, characterized in that: When the increased intersection water temperature reaches the hot water inlet temperature of the hot water control device, the hot water control device is turned on alone, the cold water control device is turned off, and the flow rate of the hot water control device is adjusted based on the target outlet water temperature until the actual outlet water temperature reaches the target outlet water temperature.

8. The water outlet control method of a water purifier according to any one of claims 1 to 7, characterized in that: The adjusting the initial water production ratio based on the actual heating power and the preset heating power includes: Determine the temperature range in which the intersection water temperature prediction value is located, wherein the temperature range includes at least a first temperature preset range, a second temperature preset range, and a third temperature preset range from high to low temperature values; When the predicted value of the intersection water temperature is within a first preset temperature range, closing the cold water control device and opening the hot water control device according to the target water outlet flow rate; When the predicted value of the intersection water temperature is within a second preset temperature range, simultaneously turning on the cold water control device and the hot water control device according to the target water outlet flow rate; When the predicted value of the intersection water temperature is within a third preset temperature range, the cold water control device is turned on and the hot water control device is turned off according to the target water outlet flow rate.

9. The water outlet control method of a water purifier according to claim 8, characterized in that: Simultaneously turning on the cold water control device and the hot water control device according to the target water flow rate includes: Obtain target water output; determining a first operating power of the hot water control device based on the target water outlet temperature; determining a second operating power of the chilled water control device based on the target water output and the first operating power; controlling the hot water control device to operate at a first operating power, and controlling the cold water control device to operate at a second operating power; In which, when the hot water control device and the cold water control device work at the same time, the water flow in the proportional adjustment device satisfies a preset relationship with the first working power and the second working power, and the preset relationship is determined based on the working power range and maximum actual flow of the hot water control device and the cold water control device.

10. The water outlet control method of a water purifier according to claim 9, characterized in that: When the hot water control device and the cold water control device work at the same time, The maximum actual flow rate of the hot water control device is determined based on the flow rate of the cold water control device; and / or The maximum actual flow rate of the cold water control device is determined based on the flow rate of the hot water control device.

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