Water drinking device and control method thereof

Abstract

The invention discloses a water drinking device and a control method thereof, and relates to the technical field of water drinking devices. The water inlet end of the water purification module communicates with the water outlet end of the water pump, and the water outlet end is connected with a normal-temperature water path and a hot water path in parallel; the phase change heat storage module is arranged on the hot water path; the water mixing valve is provided with a first water inlet end, a second water inlet end and a water outlet end, the first water inlet end communicates with the water outlet end of the normal-temperature water path, and the second water inlet end communicates with the water outlet end of the hot water path; the water inlet end of the instant heating module communicates with the water outlet end of the water mixing valve; the control module is electrically connected with the water pump, the water mixing valve and the instant heating module and used for adjusting the opening degree of the water mixing valve at the first water inlet end and the opening degree of the water mixing valve at the second water inlet end according to the current target water outlet mode of the water drinking device and controlling the instant heating module to start or stop working. The water outlet freshness of the water drinking device can be improved, and the water outlet temperature stability and the water outlet flow of the water drinking device in the boiling water outlet mode and the hot water outlet mode are improved.

Description

Technical Field

[0001] This application relates to the field of drinking water device technology, and in particular to a drinking water device and its control method. Background Technology

[0002] Existing drinking water devices that can provide various water temperatures, such as boiling water, hot water, and cold water, mainly adopt two methods: instant heating and heat storage heating.

[0003] However, instant hot water dispensers are limited by the power limits of household appliances. When dispensing boiling or hot water, they often need to reduce the water flow rate to ensure the heating effect. This results in a small water flow rate, which is difficult to meet the high flow rate needs of users in scenarios such as getting water and making drinks.

[0004] In order to provide hot water at any time, storage-type drinking water devices need to preheat the water and store it in an insulated tank. This can cause the water to stagnate and become stagnant water, and may be repeatedly heated to become repeatedly boiled water, which seriously affects the freshness of the water. Summary of the Invention

[0005] The main purpose of this application is to provide a drinking water device that aims to improve the freshness of the water dispensed by the device and to improve the stability of the water temperature and the water flow rate in both boiling water mode and hot water mode.

[0006] To achieve the above objectives, this application proposes a drinking water device, comprising:

[0007] Water pump; A water purification module, wherein the water inlet of the water purification module is connected to the water outlet of the water pump, and the water outlet of the water purification module is connected in parallel to a normal temperature water circuit and a hot water circuit; A phase change heat storage module, wherein the phase change heat storage module is disposed on the hot water circuit; A mixing valve, the mixing valve having a first inlet end, a second inlet end and an outlet end, the first inlet end being connected to the outlet end of the ambient temperature water circuit, and the second inlet end being connected to the outlet end of the hot water circuit; An instant heating module, wherein the water inlet of the instant heating module is connected to the water outlet of the mixing valve; The control module is electrically connected to the water pump, the mixing valve, and the instant heating module, respectively. It is used to adjust the opening degree of the mixing valve at the first water inlet and the opening degree at the second water inlet according to the target water outlet mode of the drinking water device, and to control the instant heating module to start or stop working.

[0008] In one embodiment, the drinking water device further includes: A pure water inlet valve is provided on the ambient temperature water circuit and is located between the outlet end of the water purification module and the first inlet end. A hot water inlet valve is provided on the hot water circuit and is located between the outlet end of the water purification module and the second inlet end. The control module is also electrically connected to the pure water inlet valve and the hot water inlet valve, and the control module is also used to control the opening and closing of the pure water inlet valve and the hot water inlet valve according to the target water output mode.

[0009] In one embodiment, the drinking water device further includes a first temperature sampling module disposed at the water inlet of the instant heating module, and the first temperature sampling module is electrically connected to the control module. The control module is further configured to: When the target water output mode is boiling water output mode, the first actual inlet water temperature of the instant heating module collected by the first temperature sampling module is periodically acquired. Based on the first actual inlet water temperature and the preset inlet water temperature threshold, adjust the opening degree of the mixing valve at the first inlet end and / or at the second inlet end; When the target water output mode is hot water output mode, the second actual inlet water temperature of the instant heating module collected by the first temperature sampling module is periodically acquired. Based on the second actual inlet water temperature and the target hot water temperature, adjust the opening of the mixing valve at the first inlet end and / or at the second inlet end so that the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module is within a preset temperature difference range.

[0010] In one embodiment, the control module is further configured to: If the first actual inlet water temperature is greater than the preset inlet water temperature threshold, then the opening of the mixing valve at the first inlet end is increased, and / or the opening at the second inlet end is decreased. If the first actual inlet water temperature is less than or equal to the preset inlet water temperature threshold, then the opening of the mixing valve at the first inlet end is adjusted to be fully closed and the opening at the second inlet end is adjusted to be fully open.

[0011] In one embodiment, the control module is further configured to: The difference between the target hot water temperature and the second actual inlet water temperature is determined as the actual temperature difference; If the actual temperature difference is greater than the upper limit of the preset temperature difference range, then the opening of the mixing valve at the first water inlet end is reduced, and / or the opening at the second water inlet end is increased. If the actual temperature difference is less than the lower limit of the preset temperature difference range, then the opening of the mixing valve at the first inlet end is increased, and / or the opening at the second inlet end is decreased. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is less than the preset temperature difference threshold, then the opening of the mixing valve at the first water inlet end is increased, and / or the opening at the second water inlet end is decreased. If the actual temperature difference is within the preset temperature difference range, and the actual temperature difference is greater than or equal to the preset temperature difference threshold, then the opening degree of the mixing valve at the first water inlet end and the opening degree at the second water inlet end are maintained.

[0012] In one embodiment, the drinking water device further includes a flow meter connected to the outlet of the water purification module, and the flow meter is electrically connected to the control module. The control module is further configured to: When the target water outlet mode is boiling water outlet mode, while adjusting the opening of the mixing valve at the first water inlet end and / or the opening at the second water inlet end according to the first actual water inlet temperature and the preset water inlet temperature threshold, the first water flow rate collected by the flow meter is periodically acquired. The first target heating power of the instant heating module is determined based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. Control the instant heating module to operate at the first target heating power; When the target water outlet mode is hot water outlet mode, while adjusting the opening of the mixing valve at the first water inlet and / or the opening at the second water inlet according to the second actual water inlet temperature and the target hot water temperature, the second water flow rate collected by the flow meter is periodically acquired. The second target heating power of the instant heating module is determined based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature. The instant heating module is controlled to operate at the second target heating power.

[0013] In one embodiment, the drinking water device further includes a second temperature sampling module disposed at the water outlet of the instant heating module, and the second temperature sampling module is electrically connected to the control module. The control module is further configured to: When the target water outlet mode is boiling water outlet mode, if the heating power of the instant heating module is detected to reach the maximum working power of the instant heating module, the first actual water outlet temperature of the instant heating module collected by the second temperature sampling module is periodically acquired. If the first actual outlet water temperature is lower than the target boiling water temperature, then the speed of the water pump is reduced.

[0014] In one embodiment, the control module is further configured to: After controlling the instant heating module to operate at the second target heating power, the second actual outlet water temperature of the instant heating module collected by the second temperature sampling module is periodically acquired. If the second actual outlet water temperature is greater than the target hot water temperature, then reduce the heating power of the instant heating module; If the second actual outlet water temperature is lower than the target hot water temperature, then the heating power of the instant heating module is increased.

[0015] In one embodiment, the control module is used to: When the target water output mode is boiling water output mode, adjust the opening of the mixing valve to be fully closed at the first water inlet and fully open at the second water inlet, and control the instant heating module to start working. When the target water output mode is hot water output mode, the opening degree of the mixing valve at the first water inlet is adjusted to a first preset opening degree and the opening degree at the second water inlet is adjusted to a second preset opening degree, and the instant heating module is controlled to start working. When the target water output mode is cold water output mode, adjust the opening of the mixing valve to be fully open at the first water inlet and fully closed at the second water inlet, and control the instant heating module to stop working.

[0016] In one embodiment, the control module is used to: Obtain the initial inlet water temperature at the water inlet of the instant heating module when the drinking water device enters the hot water dispensing mode; Based on the initial inlet water temperature and the target hot water temperature, with the goal of adjusting the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module to be within a preset temperature difference range, the first preset opening degree and the second preset opening degree are determined.

[0017] In one embodiment, the drinking water device further includes: The third temperature sampling module is installed on the phase change heat storage module and is used to collect the temperature of the phase change heat storage module; A cast aluminum heating tube is installed on the phase change heat storage module and is used to heat the phase change material in the phase change heat storage module; The control module is also electrically connected to the third temperature sampling module and the cast aluminum heating tube, and the control module is further used for: When the water drinking device is in standby mode, the first temperature of the phase change heat storage module collected by the third temperature sampling module is obtained; If the first temperature is greater than or equal to the melting point temperature of the phase change material in the phase change heat storage module, then the phase change heat storage module is controlled to enter the heat preservation mode. If the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module, then the cast aluminum heating tube is controlled to start working.

[0018] In one embodiment, the drinking device further includes a fourth temperature sampling module installed on the cast aluminum heating tube, and the fourth temperature sampling module is electrically connected to the control module. The control module is further configured to: When the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module, the second temperature of the cast aluminum heating tube collected by the fourth temperature sampling module is obtained. If the second temperature is less than the preset safe temperature threshold, the cast aluminum heating tube is controlled to start working. If the second temperature is greater than or equal to the preset safe temperature threshold, the cast aluminum heating tube is controlled to stop working.

[0019] Furthermore, to achieve the above objectives, this application also proposes a control method for a drinking water device, applied to the drinking water device described above, the method comprising: Monitor the current target water dispensing mode of the drinking water device; According to the target water output mode, adjust the opening degree of the mixing valve at the first water inlet and the opening degree at the second water inlet in the drinking water device, and control the instant heating module in the drinking water device to start or stop working.

[0020] This application provides a drinking water device, comprising: a water pump; a water purification module, the inlet of which is connected to the outlet of the water pump, and the outlet of which is connected in parallel to a normal temperature water path and a hot water path; a phase change heat storage module disposed on the hot water path; a mixing valve having a first inlet, a second inlet, and an outlet, the first inlet being connected to the outlet of the normal temperature water path, and the second inlet being connected to the outlet of the hot water path; an instant heating module, the inlet of which is connected to the outlet of the mixing valve; and a control module electrically connected to the water pump, the mixing valve, and the instant heating module, respectively, for adjusting the opening degree of the mixing valve at the first inlet and the opening degree at the second inlet according to the target water dispensing mode currently in which the drinking water device is, and controlling the instant heating module to start or stop working.

[0021] Therefore, the technical solution provided in this application sets up parallel ambient temperature water and hot water circuits upstream of the instant heating module, and integrates a phase change heat storage module in the hot water circuit. This allows the water flow to preheat by acquiring the heat energy stored in the phase change heat storage module through the hot water circuit before entering the instant heating module. More importantly, the control module can flexibly adjust the opening of the mixing valve at the first inlet and the second inlet according to the current target water output mode of the drinking water device. This allows the drinking water device to flexibly switch between various states such as "pure phase change hot water preheating" and "cold and hot mixed water preheating." This not only provides the instant heating module with a more stable inlet water condition closer to the target temperature, thereby improving the stability of the final water output temperature, but also distributes most of the heat load required for heating, enabling the instant heating module to heat a larger flow rate of water from the preheating temperature to the target temperature under the same rated power. This overcomes the water output flow bottleneck caused by power limitations in pure instant heating solutions, significantly increasing the water output flow rate in both boiling and hot water output modes.

[0022] Meanwhile, the drinking water device provided in this application adopts the principle of instant heating. The water can be heated instantly during the process of preheating through the phase change heat storage module and final heating through the instant heating module, and is directly output through the dynamic flow path. The entire process does not require water storage and insulation, thus effectively avoiding the problem of stale water caused by water stagnation, and also avoiding the formation of repeatedly boiled water, thereby significantly improving the freshness of the water.

[0023] In summary, the technical solution provided in this application can improve the freshness of the water dispensed by the water dispenser, and improve the stability of the water temperature and the water flow rate in both boiling water mode and hot water mode. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the drinking water device provided in the first embodiment of this application; Figure 2 This is another structural schematic diagram of the drinking device provided in the first embodiment of this application; Figure 3 This is a schematic diagram of the structure of the drinking water device provided in the second embodiment of this application; Figure 4 This is a schematic diagram of the structure of the drinking water device provided in the third embodiment of this application; Figure 5 This is a schematic diagram of the structure of the drinking water device provided in the fourth embodiment of this application; Figure 6 This is a schematic diagram of the structure of the drinking water device provided in the sixth embodiment of this application; Figure 7 This is a schematic diagram of the structure of the drinking water device provided in the seventh embodiment of this application; Figure 8 A schematic flowchart illustrating the control method of the drinking water device provided in the embodiments of this application.

[0026] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Explanation of icon numbers: 1. Water pump; 2. Water purification module; 3. Phase change heat storage module; 4. Mixing valve; 5. Instant heating module; 6. Control module; 7. Pure water inlet valve; 8. Hot water inlet valve; 9. First temperature sampling module; 10. Flow meter; 11. Second temperature sampling module; 12. Third temperature sampling module; 13. Cast aluminum heating tube; 14. Fourth temperature sampling module. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0031] Existing drinking water devices that can provide various water temperatures, such as boiling water, hot water, and cold water, mainly adopt two methods: instant heating and heat storage heating.

[0032] However, instant hot water dispensers are limited by the power limits of household appliances. When dispensing boiling or hot water, they often need to reduce the water flow rate to ensure the heating effect. This results in a small water flow rate, which is difficult to meet the high flow rate needs of users in scenarios such as getting water and making drinks.

[0033] In order to provide hot water at any time, storage-type drinking water devices need to preheat the water and store it in an insulated tank. This can cause the water to stagnate and become stagnant water, and may be repeatedly heated to become repeatedly boiled water, which seriously affects the freshness of the water.

[0034] Based on this, the first embodiment of this application proposes a drinking water device, please refer to... Figure 1 The drinking water device may include: Water pump 1; Water purification module 2, the water inlet of water purification module 2 is connected to the water outlet of water pump 1, and the water outlet of water purification module 2 is connected in parallel to a normal temperature water circuit and a hot water circuit. Phase change heat storage module 3 is installed on the hot water circuit; The mixing valve 4 has a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to the outlet end of the normal warm water circuit, and the second inlet end is connected to the outlet end of the hot water circuit. The water inlet of the instant heating module 5 is connected to the water outlet of the mixing valve 4. The control module 6 is electrically connected to the water pump 1, the mixing valve 4 and the instant heating module 5 respectively. It is used to adjust the opening degree of the mixing valve 4 at the first water inlet and the opening degree at the second water inlet according to the target water outlet mode of the drinking water device, and to control the instant heating module 5 to start or stop working.

[0035] It should be noted that water pump 1 provides the water flow power for the drinking water device, and its inlet is used to connect to municipal tap water or other water source pipelines. Water purification module 2 filters and purifies the incoming water flow. It may include multi-stage filter cartridges, such as polypropylene cotton filter cartridges, granular activated carbon filter cartridges, reverse osmosis membrane filter cartridges, and post-activated carbon filter cartridges, to remove suspended solids, residual chlorine, heavy metals, microorganisms, and other impurities from the water flow, outputting purified water that meets direct drinking standards. The ambient temperature water circuit and the hot water circuit are led out in parallel from the outlet of water purification module 2. Thus, the ambient temperature water circuit directly guides the purified water to mixing valve 4, while the hot water circuit guides the purified water to phase change heat storage module 3 for preheating before guiding it to mixing valve 4. Phase change heat storage module 3 is located on the hot water circuit and is used to store heat energy and instantaneously preheat the flowing water. The mixing valve 4 is a two-inlet, one-outlet mixing valve. By controlling the position of the valve core or the opening and closing of the actuator, the mixing ratio of water from the ambient temperature water circuit and the hot water circuit can be adjusted, thereby regulating the temperature of the mixed water. The instant heating module 5 is used to finally heat the mixed water. It adopts the instant heating principle, and its maximum heating power is limited by household circuits, typically 2200W. The control module 6 can be an MCU (Microcontroller Unit) or a control system or control circuit with data processing, network communication, and program execution functions. This embodiment does not specifically limit this.

[0036] In one feasible implementation, when the control module 6 adjusts the opening degree of the mixing valve 4 at the first water inlet and the second water inlet according to the target water dispensing mode currently in which the water drinking device is operating, and controls the instant heating module 5 to start or stop working, the specific implementation process may include: When the target water output mode is boiling water output mode, adjust the opening of the mixing valve 4 to be fully closed at the first water inlet and fully open at the second water inlet, and control the instant heating module 5 to start working. When the target water output mode is hot water output mode, adjust the opening of the mixing valve 4 at the first water inlet to the first preset opening and the opening at the second water inlet to the second preset opening, and control the instant heating module 5 to start working. When the target water output mode is cold water output mode, adjust the opening of the mixing valve 4 to be fully open at the first water inlet and fully closed at the second water inlet, and control the instant heating module 5 to stop working.

[0037] It should be noted that both the first preset opening degree and the second preset opening degree can be default values, or they can be flexibly set by the user according to the actual situation. For example, the initial inlet water temperature at the water inlet of the instant heating module 5 when the water dispenser enters the hot water dispensing mode can be obtained first. Then, based on the initial inlet water temperature and the target hot water temperature, the first preset opening degree and the second preset opening degree are determined with the goal of adjusting the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module 5 to be within a preset temperature difference range. This embodiment does not make specific limitations on this. The initial inlet water temperature refers to the inlet water temperature at the water inlet of the instant heating module 5 when the water dispenser enters the hot water dispensing mode; the first preset opening degree can be equal to or unequal to the second preset opening degree, and this embodiment does not make specific limitations on this.

[0038] Understandably, in boiling water mode, by setting the first inlet (normal temperature water path) to be fully closed and the second inlet (hot water path) to be fully open, the preheating efficiency of the phase change heat storage module 3 can be maximized, providing the highest possible inlet water temperature starting point for the instant heating module 5. By allowing all water to flow through the phase change heat storage module 3, the water can achieve the highest possible preheating temperature, thereby minimizing the temperature difference required for the instant heating module 5 to rise. This allows the instant heating module 5 to heat a larger flow rate of water at the same power.

[0039] In hot water mode, by setting specific first and second preset opening degrees for the first and second inlet terminals, the preheating temperature can be flexibly set and the system energy efficiency optimized through precise adjustment of the hot and cold water ratio. Specifically, the user's required hot water temperature is usually below the boiling point (e.g., 40-85℃). If pure hot water is still used for preheating, the preheating temperature may be higher than the target temperature, requiring the instant heating module 5 to cool down, resulting in low heating efficiency. Therefore, by adjusting the opening degrees of the two inlet terminals, the control module 6 can mix high-temperature phase-change hot water with room-temperature pure water as needed, allowing the temperature of the mixed water to be precisely set to a value slightly lower than the target hot water temperature. In this way, the instant heating module 5 only needs to perform a small, precise final heating to heat the water flow to the target hot water temperature, ensuring both the stability and accuracy of temperature control and avoiding energy waste.

[0040] In cold water output mode, the instant heating module 5 is stopped, and the first water inlet is set to fully open and the second water inlet to fully close, so that the water flows directly to the outlet through the ambient temperature water path without passing through the phase change heat storage module 3 and the instant heating module 5. This ensures that the water is heated and stored without any heating, and is output in the most direct and fastest way, thereby maximizing the freshness and low temperature of the purified water.

[0041] In one feasible implementation, please refer to Figure 2 The drinking water device may also include: Pure water inlet valve 7 is located on the normal temperature water circuit and is located between the outlet end and the first inlet end of the water purification module 2. Hot water inlet valve 8 is located on the hot water circuit and is positioned between the outlet end and the second inlet end of the water purification module 2. The control module 6 is also electrically connected to the pure water inlet valve 7 and the hot water inlet valve 8. The control module 6 is also used to control the opening and closing of the pure water inlet valve 7 and the hot water inlet valve 8 according to the target water output mode.

[0042] It should be noted that both the pure water inlet valve 7 and the hot water inlet valve 8 can be normally closed, normally open, or proportional regulating valves, etc., and this embodiment does not impose any specific limitations on them. In this embodiment, a normally closed solenoid valve is preferred because it is in an automatically closed state when it does not receive a conduction command from the control module 6. It can reliably cut off the water path when not in operation, thereby further improving the sealing and safety of the flow path.

[0043] It is understandable that the mixing valve 4 is mainly used to achieve proportional mixing of two water flows. Its internal sealing structure usually cannot withstand the continuous water pressure of the water circuit, and problems such as water leakage and cross-contamination are prone to occur during long-term use. Therefore, this embodiment sets independent pure water inlet valve 7 and hot water inlet valve 8 on the normal temperature water circuit and the hot water circuit respectively. The control module 6 synchronously controls the opening and closing of the two valves according to the target water output mode. Thus, when the mixing valve 4 closes the corresponding flow path, the pure water inlet valve 7 and the hot water inlet valve 8 can completely cut off the corresponding water path, thereby blocking the water flow from the source. This effectively prevents the pressurized water flow in the water circuit from leaking or cross-contaminating through the sealing gap of the mixing valve 4, improves the sealing and reliability of the water flow control of the drinking water device, ensures that each flow path operates independently and does not interfere with each other, and also extends the service life of the mixing valve 4.

[0044] As can be seen from the above, the technical solution provided in this embodiment, by setting up a parallel ambient temperature water path and a hot water path upstream of the instant heating module 5, and integrating a phase change heat storage module 3 in the hot water path, allows the water flow to preheat by acquiring the heat energy stored in the phase change heat storage module 3 through the hot water path before entering the instant heating module 5. More importantly, the control module 6 can flexibly adjust the opening degree of the mixing valve 4 at the first water inlet and the second water inlet according to the current target water dispensing mode of the drinking water device. This allows the drinking water device to flexibly switch between various states such as "pure phase change hot water preheating" and "cold and hot mixed water preheating". This not only provides the instant heating module 5 with a more stable inlet water condition that is closer to the target temperature, thereby improving the stability of the final outlet water temperature; but also the preheating distributes most of the heat load required for heating, enabling the instant heating module 5 to heat a larger flow of water from the preheating temperature to the target temperature under the same rated power, thus breaking through the bottleneck of outlet water flow caused by power limitation in pure instant heating schemes, and greatly improving the outlet water flow in boiling water and hot water modes.

[0045] Meanwhile, the drinking water device provided in this embodiment adopts the principle of instant heating. The water can be heated instantly during the process of preheating through the phase change heat storage module 3 and final heating through the instant heating module 5, and is directly output through the dynamic flow path. The entire process does not require water storage and heat preservation, thus effectively avoiding the problem of stale water caused by water stagnation, and also avoiding the formation of repeatedly boiled water, thereby significantly improving the freshness of the water.

[0046] In summary, the technical solution provided in this embodiment can improve the freshness of the water dispensed by the water dispenser, and improve the stability of the water temperature and the water flow rate of the water dispenser in both boiling water mode and hot water mode.

[0047] Based on the first embodiment described above, a second embodiment of the drinking water device of this application is proposed. For the second embodiment, please refer to... Figure 3 The drinking water device may further include a first temperature sampling module 9 located at the water inlet of the instant heating module 5, and the first temperature sampling module 9 is electrically connected to the control module 6. The control module 6 is also used for: When the target water output mode is boiling water output mode, the first actual inlet water temperature of the instant heating module 5 collected by the first temperature sampling module 9 is periodically acquired. Based on the first actual inlet water temperature and the preset inlet water temperature threshold, adjust the opening degree of the mixing valve 4 at the first inlet end and / or the opening degree at the second inlet end. When the target water output mode is hot water output mode, the second actual inlet water temperature of the instant heating module 5 collected by the first temperature sampling module 9 is periodically acquired. Based on the second actual inlet water temperature and the target hot water temperature, adjust the opening of the mixing valve 4 at the first inlet end and / or the opening at the second inlet end so that the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module 5 is within the preset temperature difference range.

[0048] It should be noted that the first temperature sampling module 9 can be a temperature sensor, temperature probe, or other device with temperature acquisition function, etc., and this embodiment does not specifically limit it. The first actual inlet water temperature is the actual water temperature value at the inlet of the instant heating module 5, which is periodically measured by the first temperature sampling module 9 and fed back to the control module 6 in boiling water mode. When periodically acquiring the first actual inlet water temperature at the inlet of the instant heating module 5 collected by the first temperature sampling module 9, the first actual inlet water temperature at the inlet of the instant heating module 5 collected by the first temperature sampling module 9 can be acquired according to the default period (e.g., 0.1 seconds); or it can be acquired according to the period flexibly set by the user according to the actual situation, and this embodiment does not specifically limit it. The preset inlet water temperature threshold is a preset critical temperature value used to determine whether the inlet water temperature in boiling water mode meets the preheating requirements. It can be a default value, such as 85°C, or it can be flexibly set by the user according to the actual situation (for example, it can be set to the melting point temperature of the phase change material in the phase change heat storage module 3). This embodiment does not make specific limitations on this.

[0049] Additionally, it should be noted that the second actual inlet water temperature is the actual water temperature value at the inlet of the instant heating module 5, which is periodically measured and fed back to the control module 6 by the first temperature sampling module 9 in hot water output mode. When periodically acquiring the second actual inlet water temperature at the inlet of the instant heating module 5 collected by the first temperature sampling module 9, the second actual inlet water temperature can be acquired at a default period (e.g., 0.1 seconds); or at a period flexibly set by the user according to actual conditions. This embodiment does not specifically limit this. The target hot water temperature is the target hot water output temperature set by the user or by default in hot water output mode. The preset temperature difference range is the allowable temperature difference range between the target hot water temperature and the inlet water temperature of the instant heating module 5, set in advance to ensure stable hot water heating and reasonable power. The preset temperature difference range can be a default range, such as 0℃~10℃, or it can be flexibly set by the user according to actual conditions. This embodiment does not specifically limit this.

[0050] In one feasible implementation, when the control module 6 adjusts the opening degree of the mixing valve 4 at the first inlet end and / or the opening degree at the second inlet end based on the first actual inlet water temperature and the preset inlet water temperature threshold, the specific implementation process may include: If the first actual inlet water temperature is greater than the preset inlet water temperature threshold, then the opening of the mixing valve 4 at the first inlet end is increased, and / or the opening at the second inlet end is decreased. If the first actual inlet water temperature is less than or equal to the preset inlet water temperature threshold, then the opening of the mixing valve 4 at the first inlet end is fully closed and the opening at the second inlet end is fully open.

[0051] It should be noted that when increasing the opening of the mixing valve 4 at the first water inlet, the opening of the mixing valve 4 at the first water inlet can be increased by a set amount or percentage; or the opening can be increased by a flexibly determined amount or percentage (for example, the corresponding amount or percentage can be determined based on the difference between the first actual water inlet temperature and the preset water inlet temperature threshold). This embodiment does not impose specific limitations on this.

[0052] Similarly, when reducing the opening of the mixing valve 4 at the second water inlet, the opening of the mixing valve 4 at the second water inlet can be reduced by a set amount or percentage of reduction; or the opening of the mixing valve 4 at the second water inlet can be reduced by a flexibly determined amount or percentage of reduction (for example, the corresponding amount or percentage of reduction can be determined based on the difference between the first actual water inlet temperature and the preset water inlet temperature threshold). This embodiment does not impose specific limitations on this.

[0053] This embodiment uses a preset inlet water temperature threshold as the adjustment benchmark to differentiate the opening of the two channels of the mixing valve 4. Specifically, when the first actual inlet water temperature is too high, the opening of the mixing valve 4 at the first inlet end is increased and / or the opening at the second inlet end is decreased to increase the amount of ambient temperature water mixed in and / or decrease the amount of hot water mixed in, thereby appropriately lowering the temperature and avoiding overheating of the instant heating module 5 or excessive outlet water temperature due to excessively high inlet water temperature. When the first actual inlet water temperature is too low, the opening of the mixing valve 4 at the first inlet end is adjusted to be fully closed and the opening at the second inlet end is adjusted to be fully open to fully utilize the preheating capacity of the phase change heat storage module 3 and ensure that the inlet water temperature meets the boiling water heating requirements. Therefore, the adjustment method provided in this embodiment has a simple, reliable and rapid response logic, and can continuously provide stable and qualified preheated water to the instant heating module 5. This not only ensures the stability of the boiling water outlet temperature, but also gives full play to the preheating function of the phase change heat storage module 3, thereby improving the overall heating efficiency and water flow rate.

[0054] This embodiment does not specifically limit the implementation method of the control module 6 in adjusting the opening degree of the mixing valve 4 at the first inlet end and / or the second inlet end based on the first actual inlet water temperature and the preset inlet water temperature threshold. For example, in other feasible embodiments, a proportional-integral-differential algorithm can be used to generate a control output quantity based on the first actual inlet water temperature and the preset inlet water temperature threshold, and then the opening degree of the mixing valve 4 at the first inlet end and / or the second inlet end can be adjusted based on the control output quantity.

[0055] In one feasible implementation, when the control module 6 adjusts the opening degree of the mixing valve 4 at the first inlet end and the second inlet end according to the second actual inlet water temperature and the target hot water temperature, the specific implementation process may include: The difference between the target hot water temperature and the second actual inlet water temperature is determined as the actual temperature difference; If the actual temperature difference is greater than the upper limit of the preset temperature difference range, then reduce the opening of the mixing valve 4 at the first inlet end and / or increase the opening at the second inlet end. If the actual temperature difference is less than the lower limit of the preset temperature difference range, the opening of the mixing valve 4 at the first inlet end will be increased, and / or the opening at the second inlet end will be decreased. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is less than the preset temperature difference threshold, then increase the opening of the mixing valve 4 at the first water inlet and / or decrease the opening at the second water inlet. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is greater than or equal to the preset temperature difference threshold, then the opening of the mixing valve 4 at the first water inlet end and the opening at the second water inlet end will be maintained.

[0056] It should be noted that the upper limit of the preset temperature difference range is the maximum temperature difference within the preset temperature difference range (e.g., 10℃), and the lower limit of the preset temperature difference range is the minimum temperature difference within the preset temperature difference range (e.g., 0℃). The preset temperature difference threshold is a specific boundary value set within the preset temperature difference range. It serves as the basis for determining whether the thermal energy of the instant heating module 5 can be maximized. It can be a default value, such as 5℃, or it can be flexibly set by the user according to the actual situation. This embodiment does not impose specific limitations on it.

[0057] Understandably, if the actual temperature difference is greater than the upper limit of the preset temperature difference range, it means that the second actual inlet water temperature is much lower than the target hot water temperature. The instant heating module 5 needs to bear an excessive heating load. In this case, the mixing ratio of room temperature water can be reduced and the mixing ratio of hot water can be increased by reducing the opening of the mixing valve 4 at the first inlet end and / or increasing the opening at the second inlet end, so as to increase the inlet water temperature of the instant heating module 5, reduce the actual temperature difference, and ensure that the instant heating module 5 can quickly and stably heat the water to the target hot water temperature.

[0058] If the actual temperature difference is less than the lower limit of the preset temperature difference range, it means that the second actual inlet water temperature is close to the target hot water temperature and the inlet water temperature is too high. At this time, the mixing ratio of room temperature water and the mixing ratio of hot water can be increased by increasing the opening of the mixing valve 4 at the first inlet end and / or decreasing the opening at the second inlet end, so as to reduce the inlet water temperature of the instant heating module 5 and avoid the outlet water temperature from being too high.

[0059] If the actual temperature difference is within the preset temperature difference range and is less than the preset temperature difference threshold, it means that the heat energy of the instant heating module 5 cannot be maximized under the current inlet water temperature. In this case, the mixing ratio of room temperature water can be appropriately increased and the mixing ratio of hot water can be reduced by increasing the opening of the mixing valve 4 at the first inlet water end and / or decreasing the opening at the second inlet water end, so as to further reduce the inlet water temperature and make the inlet water temperature appropriately far away from the target hot water temperature, thereby maximizing the utilization of the heat energy of the instant heating module 5.

[0060] If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is greater than or equal to the preset temperature difference threshold, it means that the difference between the target hot water temperature and the current inlet water temperature is in the optimal range, which can ensure heating effect while taking efficiency into account. At this time, the opening of the mixing valve 4 at the first inlet and the second inlet can be kept unchanged to avoid frequent system adjustments and ensure stable outlet water temperature and smooth operation.

[0061] In this embodiment, by setting a preset temperature difference threshold within a preset temperature difference range, the actual temperature difference is compared and judged at multiple levels with the preset temperature difference range and the preset temperature difference threshold, thereby achieving refined and intelligent adjustment of the opening of the mixing valve 4. Specifically, when the actual temperature difference exceeds the preset temperature difference range, the opening of the mixing valve 4 can be quickly adjusted to correct the inlet water temperature deviation, ensuring stable and reliable inlet water conditions for the instant heating module 5; when the actual temperature difference is within the preset temperature difference range and less than the preset temperature difference threshold, the mixing ratio of room temperature water is appropriately increased to minimize the inlet water temperature and increase the heating temperature difference while ensuring the heating effect, thereby maximizing the utilization of the heat energy of the instant heating module 5; when the actual temperature difference is greater than or equal to the preset temperature difference threshold, the opening of the mixing valve 4 is kept unchanged to avoid system fluctuations caused by frequent adjustments. Therefore, this implementation not only ensures the stability and accuracy of the hot water outlet temperature, but also realizes the efficient utilization of the thermal energy of the instant heating module 5, making the cooperation between the phase change heat storage module 3 and the instant heating module 5 more reasonable, and further improving the temperature control accuracy, operational stability and energy utilization rate of the drinking water device in the hot water outlet mode.

[0062] This embodiment does not specifically limit the implementation method of the control module 6 in adjusting the opening degree of the mixing valve 4 at the first inlet and the second inlet based on the second actual inlet water temperature and the target hot water temperature. For example, in other feasible embodiments, after determining the difference between the target hot water temperature and the second actual inlet water temperature as the actual temperature difference, if the actual temperature difference is greater than the upper limit of the preset temperature difference range, the opening degree of the mixing valve 4 at the first inlet water is reduced, and / or the opening degree at the second inlet water is increased; if the actual temperature difference is less than the lower limit of the preset temperature difference range, the opening degree of the mixing valve 4 at the first inlet water is increased, and / or the opening degree at the second inlet water is decreased; if the actual temperature difference is within the preset temperature difference range, the opening degree of the mixing valve 4 at the first inlet water and the second inlet water are maintained.

[0063] Based on the above, this embodiment achieves real-time closed-loop monitoring of the water temperature before it enters the instant heating module 5 by setting a first temperature sampling module 9 at the water inlet. The control module 6 dynamically adjusts the opening of the two mixing valves 4 according to the different requirements of the boiling water mode and the hot water mode, using a preset inlet water temperature threshold and a target hot water temperature as adjustment benchmarks, ensuring that the instant heating module 5 always operates under optimal inlet water temperature conditions. Specifically, in the boiling water mode, it ensures a sufficiently stable inlet water temperature, providing a reliable preheating basis for rapid, high-flow-rate boiling water output. In the hot water mode, it controls the difference between the target hot water temperature and the inlet water temperature within a reasonable range, reducing heating pressure and power fluctuations in the instant heating module 5, and improving heating efficiency and outlet water temperature stability. Overall, the technical solution provided in this embodiment not only improves the accuracy of water temperature regulation but also makes the cooperation between the phase change heat storage module 3 and the instant heating module 5 more efficient and stable, while avoiding fluctuations in outlet water temperature caused by inlet water temperature fluctuations, further enhancing the user experience of the drinking water device.

[0064] Based on the first and / or second embodiments described above, a third embodiment of the drinking water device of this application is proposed. In the third embodiment, please refer to... Figure 4 The drinking water device may also include a flow meter 10 connected to the outlet of the water purification module 2, and the flow meter 10 is electrically connected to the control module 6. The control module 6 is also used for: When the target water outlet mode is boiling water mode, while adjusting the opening of the mixing valve 4 at the first water inlet and / or the opening at the second water inlet according to the first actual water inlet temperature and the preset water inlet temperature threshold, the first water flow rate collected by the flow meter 10 is periodically acquired. The first target heating power of the instant heating module 5 is determined based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. Control the instant heating module 5 to operate at the first target heating power; When the target water outlet mode is hot water outlet mode, while adjusting the opening of the mixing valve 4 at the first water inlet and / or the opening at the second water inlet according to the second actual water inlet temperature and the target hot water temperature, the second water flow rate collected by the flow meter 10 is periodically acquired. The second target heating power of the instant heating module 5 is determined based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature. Control the instant heating module 5 to operate at the second target heating power.

[0065] It should be noted that the first water flow rate is the real-time water flow rate value at the outlet of the water purification module 2 collected by the flow meter 10 in boiling water mode. The first target heating power is the target heating power required for the heating module 5 to operate, calculated by the control module 6 based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. The second water flow rate is the real-time water flow rate value at the outlet of the water purification module 2 collected by the flow meter 10 in hot water mode. The second target heating power is the target heating power required for the heating module 5 to operate, calculated by the control module 6 based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature.

[0066] The control module 6 can use the water flow temperature rise calculation formula to calculate the first target heating power of the instant heating module 5 based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. Alternatively, a relational table can be used to record the working power corresponding to different outlet water temperatures, inlet water temperatures, and water flow rates in advance, thereby allowing the first target heating power to be quickly determined by looking up the table. This embodiment does not specifically limit the specific implementation method of the control module 6 in determining the first target heating power of the instant heating module 5 based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature.

[0067] Similarly, control module 6 can use the water flow temperature rise calculation formula to calculate the second target heating power of instant heating module 5 based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature. Alternatively, a relational table can be used to record the corresponding working power for different outlet water temperatures, inlet water temperatures, and water flow rates. Therefore, the second target heating power can be quickly determined by looking up the table. This embodiment does not specifically limit the specific implementation method of control module 6 in determining the second target heating power of instant heating module 5 based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature.

[0068] As can be seen from the above, this embodiment, by adding a flow meter 10 to collect water flow in real time, enables the control module 6 to accurately calculate and output the target heating power required by the instant heating module 5 by combining three parameters: inlet water temperature, target outlet water temperature, and real-time flow rate. This achieves synchronous closed-loop control of the opening adjustment of the mixing valve 4 and the power adjustment of the instant heating module 5. Therefore, it can be ensured that regardless of changes in inlet water temperature or fluctuations in outlet water flow, the instant heating module 5 can output power that precisely meets the heating requirements. This not only avoids the problem of insufficient power leading to substandard water temperature but also avoids excessive power causing temperature overshoot or energy waste, resulting in a more stable outlet water temperature and a more efficient heating process. Thus, it further improves the temperature control accuracy, operational safety, and energy utilization rate of the drinking water device in both boiling water and hot water modes.

[0069] Based on the first, second, and / or third embodiments described above, a fourth embodiment of the drinking water device of this application is proposed. In the fourth embodiment, please refer to... Figure 5 The drinking water device may further include a second temperature sampling module 11 located at the water outlet of the instant heating module 5, and the second temperature sampling module 11 is electrically connected to the control module 6. The control module 6 is also used for: When the target water outlet mode is boiling water mode, if the heating power of the instant heating module 5 is detected to reach the maximum working power of the instant heating module 5, the first actual water outlet temperature of the instant heating module 5 collected by the second temperature sampling module 11 is periodically acquired. If the first actual outlet water temperature is lower than the target boiling water temperature, then reduce the speed of water pump 1.

[0070] It should be noted that the second temperature sampling module 11 can be a temperature sensor, temperature probe, or other device with temperature acquisition function, etc., and this embodiment does not specifically limit it. The first actual outlet water temperature is the actual water temperature value at the outlet of the instant heating module 5, which is periodically measured by the second temperature sampling module 11 and fed back to the control module 6 in boiling water mode. The maximum operating power of the instant heating module 5 refers to the maximum power that the instant heating module 5 can output under rated voltage (e.g., 220V), such as 2200W. When periodically acquiring the first actual outlet water temperature at the outlet of the instant heating module 5 collected by the second temperature sampling module 11, the first actual outlet water temperature at the outlet of the instant heating module 5 collected by the second temperature sampling module 11 can be acquired according to the default period (e.g., 0.1 seconds); or it can be acquired according to the period flexibly set by the user according to the actual situation, and this embodiment does not specifically limit it.

[0071] When reducing the rotational speed of the water pump 1, the rotational speed of the water pump 1 can be reduced according to a set rotational speed reduction amount or rotational speed reduction ratio; alternatively, the rotational speed of the water pump 1 can be reduced according to a flexibly determined rotational speed reduction amount or rotational speed reduction ratio (for example, the corresponding rotational speed reduction amount or rotational speed reduction ratio can be determined according to the difference between the first actual water outlet temperature and the target boiling water temperature), and this embodiment does not make specific limitations on this.

[0072] In this embodiment, by arranging the second temperature sampling module 11 at the water outlet end of the instant heating module 5, it is used to monitor in real time whether the temperature at the water outlet end of the instant heating module 5 reaches the water outlet target temperature, and combined with the maximum working power of the instant heating module 5 for linkage protection control. Specifically, when the instant heating module 5 has reached the maximum working power but still cannot raise the water temperature to the target boiling water temperature, by reducing the rotational speed of the water pump 1, the water flow rate is reduced to extend the effective heating time of the water flow, ensuring that the water temperature can stably reach the target boiling water temperature. This not only avoids the problem of insufficient water outlet temperature caused by power limitation, but also avoids the safety hazards brought by the long-term over-power operation of the instant heating module 5, so as to improve the safety and reliability of the operation of the drinking water device while ensuring that the water outlet temperature is stably up to standard.

[0073] Similarly, in other embodiments, when the target water outlet mode is the hot water outlet mode, if it is detected that the heating power of the instant heating module 5 reaches the maximum working power of the instant heating module 5, the actual water outlet temperature at the water outlet end of the instant heating module 5 collected by the second temperature sampling module 11 can also be periodically obtained. If the actual water outlet temperature is less than the target hot water temperature, the rotational speed of the water pump 1 is reduced.

[0074] Based on the above fourth embodiment, the fifth embodiment of the drinking water device of the present application is proposed. In the fifth embodiment, the control module 6 can also be used for: After controlling the instant heating module 5 to operate at the second target heating power, periodically obtain the second actual water outlet temperature at the water outlet end of the instant heating module 5 collected by the second temperature sampling module 11; If the second actual water outlet temperature is greater than the target hot water temperature, reduce the heating power of the instant heating module 5; If the second actual water outlet temperature is less than the target hot water temperature, increase the heating power of the instant heating module 5.

[0075] It should be noted that the second actual outlet water temperature is the actual water temperature value at the outlet of the instant heating module 5, which is periodically measured and fed back to the control module 6 by the second temperature sampling module 11 in hot water mode. When periodically acquiring the second actual outlet water temperature at the outlet of the instant heating module 5 collected by the second temperature sampling module 11, the second actual outlet water temperature can be acquired according to the default period (e.g., 0.1 seconds); or it can be acquired according to the period flexibly set by the user according to the actual situation. This embodiment does not specifically limit this.

[0076] When reducing the heating power of the instant heating module 5, the heating power of the instant heating module 5 can be reduced by a set power reduction amount or power reduction ratio; or the heating power of the instant heating module 5 can be reduced by a flexibly determined power reduction amount or power reduction ratio (for example, the corresponding power reduction amount or power reduction ratio can be determined based on the difference between the second actual outlet water temperature and the target hot water temperature). This embodiment does not make specific limitations on this.

[0077] Similarly, when increasing the heating power of the instant heating module 5, the heating power of the instant heating module 5 can be increased by a set power increase amount or power increase ratio; or the heating power of the instant heating module 5 can be increased by a flexibly determined power increase amount or power increase ratio (for example, the corresponding power increase amount or power increase ratio can be determined based on the difference between the second actual outlet water temperature and the target hot water temperature). This embodiment does not make specific limitations on this.

[0078] As can be seen from the above, after controlling the instant heating module 5 to operate at the second target heating power, this embodiment will monitor the outlet water temperature of the instant heating module 5 in real time and dynamically adjust the heating power of the instant heating module 5 accordingly to quickly offset the outlet water temperature deviation caused by fluctuations in inlet water temperature and water flow, so that the outlet water temperature always stably matches the target hot water temperature. This further improves the stability and accuracy of the hot water outlet temperature, while avoiding excessive power output and improving the stability and energy utilization efficiency of the drinking water device.

[0079] Based on the first, second, third, fourth, and / or fifth embodiments described above, a sixth embodiment of the drinking water device of this application is proposed. In the sixth embodiment, please refer to... Figure 6 The drinking water device may also include: The third temperature sampling module 12 is installed on the phase change heat storage module 3 and is used to collect the temperature of the phase change heat storage module 3. A cast aluminum heating tube 13 is installed on the phase change heat storage module 3 and is used to heat the phase change material in the phase change heat storage module 3. The control module 6 is also electrically connected to the third temperature sampling module 12 and the cast aluminum heating tube 13. The control module 6 is also used for: When the water drinking device is in standby mode, the first temperature of the phase change heat storage module 3 collected by the third temperature sampling module 12 is obtained. If the first temperature is greater than or equal to the melting point temperature of the phase change material in the phase change heat storage module 3, then the phase change heat storage module 3 is controlled to enter the heat preservation mode. If the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module 3, then the cast aluminum heating tube 13 is controlled to start working.

[0080] It should be noted that the third temperature sampling module 12 can be a temperature sensor, temperature probe, or other device with temperature acquisition function, etc., and this embodiment does not specifically limit it. The first temperature is the actual temperature of the phase change heat storage module 3 measured by the third temperature sampling module 12 and fed back to the control module 6 in standby mode. Standby mode refers to the working state in which the water drinking device is powered on but has not received any water dispensing command from the user. The melting point temperature refers to the critical temperature at which the phase change material in the phase change heat storage module 3 undergoes a solid-liquid phase change. When the temperature of the phase change material reaches the melting point temperature, it begins to melt and absorb a large amount of heat to store energy; when the temperature of the phase change material drops from this melting point temperature, it begins to solidify and release a large amount of heat. The heat preservation mode is the low-power operation state of the phase change heat storage module 3. In the heat preservation mode, the control module 6 only intermittently and with low power activates the cast aluminum heating tube 13 to compensate for the heat lost by the phase change heat storage module 3 to the environment, aiming to maintain the temperature of the phase change material at a high level near the melting point with minimal energy consumption, rather than continuously heating it up.

[0081] In practical use, the third temperature sampling module 12 is generally installed on the top of the phase change heat storage module 3, and the cast aluminum heating tube 13 is generally installed at the bottom of the phase change heat storage module 3.

[0082] When acquiring the first temperature of the phase change heat storage module 3 collected by the third temperature sampling module 12, it can be acquired in real time or periodically at certain time intervals (e.g., 1 second). This embodiment does not make specific limitations on this.

[0083] This embodiment further includes a third temperature sampling module 12 and a cast aluminum heating tube 13 installed on the phase change heat storage module 3. When the water drinking device is in standby mode, the first temperature of the phase change heat storage module 3 collected by the third temperature sampling module 12 is compared with the melting point temperature of the phase change material in the phase change heat storage module 3 to ensure that the phase change material is always maintained at or above its melting point temperature, ensuring that the phase change heat storage module 3 always has sufficient and stable preheating capacity. Therefore, the technical solution provided by this embodiment not only avoids the problem of insufficient preheating of hot water and boiling water due to excessively low phase change material temperature, but also controls the phase change heat storage module 3 to automatically enter a heat preservation mode after heat storage is completed, reducing unnecessary heating energy consumption, thereby effectively improving the heating efficiency, water temperature stability, and energy utilization efficiency of the water drinking device.

[0084] Based on the sixth embodiment described above, a seventh embodiment of the drinking water device of this application is proposed. In the seventh embodiment, please refer to... Figure 7 The drinking water device may also include a fourth temperature sampling module 14 mounted on the cast aluminum heating tube 13, and the fourth temperature sampling module 14 is electrically connected to the control module 6. The control module 6 is also used for: When the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module 3, the second temperature of the cast aluminum heating tube 13 collected by the fourth temperature sampling module 14 is obtained. If the second temperature is lower than the preset safe temperature threshold, the cast aluminum heating tube 13 will be started. If the second temperature is greater than or equal to the preset safe temperature threshold, the cast aluminum heating tube 13 will stop working.

[0085] It should be noted that the fourth temperature sampling module 14 can be a temperature sensor, temperature probe, or other device with temperature acquisition function, etc., and this embodiment does not specifically limit it. The second temperature is the actual temperature of the cast aluminum heating tube 13 measured by the fourth temperature sampling module 14 and fed back to the control module 6 when the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module 3. The preset safety temperature threshold is the pre-set upper limit temperature for safe operation of the cast aluminum heating tube 13, used to prevent the cast aluminum heating tube 13 from being damaged due to overheating or causing safety hazards. The preset safety temperature threshold can be a default value, or it can be flexibly set by the user according to the actual situation. For example, it can be determined based on the material, insulation class, and long-term reliability engineering specifications of the cast aluminum heating tube 13, and this embodiment does not specifically limit it.

[0086] This embodiment installs a fourth temperature sampling module 14 on the cast aluminum heating tube 13 and sets a control module 6 to control the start and stop of the cast aluminum heating tube 13 based on the temperature of the cast aluminum heating tube 13 collected by the fourth temperature sampling module 14 and the preset safe temperature threshold. This allows for independent and real-time safety monitoring of the temperature of the cast aluminum heating tube 13 throughout the entire process of the phase change heat storage module 3 replenishing heat, avoiding safety hazards such as overheating and burnout of the cast aluminum heating tube 13 due to prolonged operation or excessive temperature. This significantly improves the operational safety, reliability, and service life of the drinking water device while ensuring that the phase change heat storage module 3 can stably store energy and continuously provide preheating for the water circuit.

[0087] Furthermore, this application also provides a control method for a drinking water device, applied to the drinking water device in the above embodiments. Please refer to... Figure 8 The method includes: Step S10: Monitor the current target water dispensing mode of the drinking water device; Step S20: According to the target water output mode, adjust the opening degree of the mixing valve in the drinking water device at the first water inlet end and the opening degree at the second water inlet end, and control the instant heating module in the drinking water device to start or stop working.

[0088] In one embodiment, step S20 may include: When the target water output mode is boiling water output mode, adjust the opening of the mixing valve at the first water inlet to be fully closed and the opening at the second water inlet to be fully open, and control the instant heating module to start working. When the target water output mode is hot water output mode, adjust the opening of the mixing valve at the first water inlet to the first preset opening and the opening at the second water inlet to the second preset opening, and control the instant heating module to start working. When the target water output mode is cold water output mode, adjust the opening of the mixing valve at the first water inlet to the fully open state and the opening at the second water inlet to the fully closed state, and control the instant heating module to stop working.

[0089] In one embodiment, the step of determining the first preset opening and the second preset opening includes: Obtain the initial inlet water temperature at the water inlet of the instant heating module when the water dispenser enters the hot water dispensing mode; Based on the initial inlet water temperature and the target hot water temperature, with the goal of adjusting the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module to be within a preset temperature difference range, the first preset opening degree and the second preset opening degree are determined.

[0090] In one embodiment, the control method for the drinking water device may further include: When the target water output mode is boiling water output mode, the first actual water inlet temperature at the water inlet of the instant heating module is periodically obtained. Adjust the opening degree of the mixing valve at the first inlet end and / or the opening degree at the second inlet end based on the first actual inlet water temperature and the preset inlet water temperature threshold. When the target water output mode is hot water output mode, the second actual inlet water temperature at the inlet of the instant heating module is periodically obtained. Based on the second actual inlet water temperature and the target hot water temperature, adjust the opening of the mixing valve at the first inlet end and / or the opening at the second inlet end so that the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module is within the preset temperature difference range.

[0091] In one embodiment, the step of adjusting the opening degree of the mixing valve at the first inlet end and / or the opening degree at the second inlet end based on the first actual inlet water temperature and a preset inlet water temperature threshold includes: If the first actual inlet water temperature is greater than the preset inlet water temperature threshold, then increase the opening of the mixing valve at the first inlet end and / or decrease the opening at the second inlet end. If the first actual inlet water temperature is less than or equal to the preset inlet water temperature threshold, the opening of the mixing valve at the first inlet end is adjusted to be fully closed and the opening at the second inlet end is adjusted to be fully open.

[0092] In one embodiment, the step of adjusting the opening degree of the mixing valve at the first inlet end and / or the opening degree at the second inlet end according to the second actual inlet water temperature and the target hot water temperature includes: The difference between the target hot water temperature and the second actual inlet water temperature is determined as the actual temperature difference; If the actual temperature difference is greater than the upper limit of the preset temperature difference range, then reduce the opening of the mixing valve at the first inlet and / or increase the opening at the second inlet. If the actual temperature difference is less than the lower limit of the preset temperature difference range, the opening of the mixing valve at the first inlet end will be increased, and / or the opening at the second inlet end will be decreased. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is less than the preset temperature difference threshold, then increase the opening of the mixing valve at the first inlet end and / or decrease the opening at the second inlet end. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is greater than or equal to the preset temperature difference threshold, then the opening of the mixing valve at the first inlet end and the opening at the second inlet end will be maintained.

[0093] In one embodiment, the control method for the drinking water device may further include: When the target water output mode is boiling water output mode, while adjusting the opening of the mixing valve at the first water inlet and / or the opening at the second water inlet according to the first actual water inlet temperature and the preset water inlet temperature threshold, the first water flow rate at the water outlet of the water purification module in the drinking water device is periodically acquired. The first target heating power of the instant heating module is determined based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. Control the instant heating module to operate at the first target heating power; When the target water output mode is hot water output mode, while adjusting the opening of the mixing valve at the first water inlet and / or the opening at the second water inlet according to the second actual water inlet temperature and the target hot water temperature, the second water flow rate at the water outlet of the water purification module is periodically acquired. The second target heating power of the instantaneous heating module is determined based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature. Control the instant heating module to operate at the second target heating power.

[0094] In one embodiment, after the step of controlling the instant heating module to operate at a first target heating power, the control method of the water drinking device may further include: When the target water outlet mode is boiling water outlet mode, if the heating power of the instant heating module is detected to reach the maximum working power of the instant heating module, the first actual water outlet temperature at the outlet of the instant heating module is periodically obtained. If the actual outlet water temperature is lower than the target boiling water temperature, reduce the pump speed.

[0095] In one embodiment, after the step of controlling the instant heating module to operate at the second target heating power, the control method of the water drinking device may further include: The second actual outlet water temperature of the instant heating module is periodically obtained. If the second actual outlet water temperature is greater than the target hot water temperature, then reduce the heating power of the instant heating module; If the second actual outlet water temperature is lower than the target hot water temperature, then increase the heating power of the instant heating module.

[0096] In one embodiment, the control method for the drinking water device may further include: When the water dispensing device is in standby mode, obtain the first temperature of the phase change heat storage module; If the first temperature is greater than or equal to the melting point temperature of the phase change material in the phase change heat storage module, then the phase change heat storage module is controlled to enter the heat preservation mode. If the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module, the cast aluminum heating tube will be started.

[0097] In one embodiment, the control method for the drinking water device may further include: The second temperature of the cast aluminum heating tube is obtained when the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module. If the second temperature is lower than the preset safe temperature threshold, the cast aluminum heating tube will be activated. If the second temperature is greater than or equal to the preset safe temperature threshold, the cast aluminum heating element will stop working.

[0098] It is understood that the beneficial effects of the control method of the drinking water device in this application embodiment are the same as the beneficial effects of the drinking water device provided in the above embodiments, and other technical features in the control method of the drinking water device are the same as the features disclosed in the above embodiments, and will not be repeated here.

[0099] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A drinking water device, characterized in that, include: Water pump; A water purification module, wherein the water inlet of the water purification module is connected to the water outlet of the water pump, and the water outlet of the water purification module is connected in parallel to a normal temperature water circuit and a hot water circuit; A phase change heat storage module, wherein the phase change heat storage module is disposed on the hot water circuit; A mixing valve, the mixing valve having a first inlet end, a second inlet end and an outlet end, the first inlet end being connected to the outlet end of the ambient temperature water circuit, and the second inlet end being connected to the outlet end of the hot water circuit; An instant heating module, wherein the water inlet of the instant heating module is connected to the water outlet of the mixing valve; The control module is electrically connected to the water pump, the mixing valve, and the instant heating module, respectively. It is used to adjust the opening degree of the mixing valve at the first water inlet and the opening degree at the second water inlet according to the target water outlet mode of the drinking water device, and to control the instant heating module to start or stop working.

2. The drinking water device as described in claim 1, characterized in that, The drinking water device also includes: A pure water inlet valve is provided on the ambient temperature water circuit and is located between the outlet end of the water purification module and the first inlet end. A hot water inlet valve is provided on the hot water circuit and is located between the outlet end of the water purification module and the second inlet end. The control module is also electrically connected to the pure water inlet valve and the hot water inlet valve, and the control module is also used to control the opening and closing of the pure water inlet valve and the hot water inlet valve according to the target water output mode.

3. The drinking water device as described in claim 1, characterized in that, The drinking water device further includes a first temperature sampling module disposed at the water inlet of the instant heating module, and the first temperature sampling module is electrically connected to the control module. The control module is further used for: When the target water output mode is boiling water output mode, the first actual inlet water temperature of the instant heating module collected by the first temperature sampling module is periodically acquired. Based on the first actual inlet water temperature and the preset inlet water temperature threshold, adjust the opening degree of the mixing valve at the first inlet end and / or at the second inlet end; When the target water output mode is hot water output mode, the second actual inlet water temperature of the instant heating module collected by the first temperature sampling module is periodically acquired. Based on the second actual inlet water temperature and the target hot water temperature, adjust the opening of the mixing valve at the first inlet end and / or at the second inlet end so that the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module is within a preset temperature difference range.

4. The drinking water device as described in claim 3, characterized in that, The control module is also used for: If the first actual inlet water temperature is greater than the preset inlet water temperature threshold, then the opening of the mixing valve at the first inlet end is increased, and / or the opening at the second inlet end is decreased. If the first actual inlet water temperature is less than or equal to the preset inlet water temperature threshold, then the opening of the mixing valve at the first inlet end is adjusted to be fully closed and the opening at the second inlet end is adjusted to be fully open.

5. The drinking water device as described in claim 3, characterized in that, The control module is also used for: The difference between the target hot water temperature and the second actual inlet water temperature is determined as the actual temperature difference; If the actual temperature difference is greater than the upper limit of the preset temperature difference range, then the opening of the mixing valve at the first water inlet end is reduced, and / or the opening at the second water inlet end is increased. If the actual temperature difference is less than the lower limit of the preset temperature difference range, then the opening of the mixing valve at the first inlet end is increased, and / or the opening at the second inlet end is decreased. If the actual temperature difference is within the preset temperature difference range and the actual temperature difference is less than the preset temperature difference threshold, then the opening of the mixing valve at the first water inlet end is increased, and / or the opening at the second water inlet end is decreased. If the actual temperature difference is within the preset temperature difference range, and the actual temperature difference is greater than or equal to the preset temperature difference threshold, then the opening degree of the mixing valve at the first water inlet end and the opening degree at the second water inlet end are maintained.

6. The drinking water device as described in claim 3, characterized in that, The drinking water device further includes a flow meter connected to the outlet of the water purification module, and the flow meter is electrically connected to the control module. The control module is also used for: When the target water outlet mode is boiling water outlet mode, while adjusting the opening of the mixing valve at the first water inlet end and / or the opening at the second water inlet end according to the first actual water inlet temperature and the preset water inlet temperature threshold, the first water flow rate collected by the flow meter is periodically acquired. The first target heating power of the instant heating module is determined based on the first actual inlet water temperature, the first water flow rate, and the target boiling water temperature. Control the instant heating module to operate at the first target heating power; When the target water outlet mode is hot water outlet mode, while adjusting the opening of the mixing valve at the first water inlet and / or the opening at the second water inlet according to the second actual water inlet temperature and the target hot water temperature, the second water flow rate collected by the flow meter is periodically acquired. The second target heating power of the instant heating module is determined based on the second actual inlet water temperature, the second water flow rate, and the target hot water temperature. The instant heating module is controlled to operate at the second target heating power.

7. The drinking water device as described in claim 6, characterized in that, The drinking water device further includes a second temperature sampling module located at the water outlet of the instant heating module, and the second temperature sampling module is electrically connected to the control module. The control module is further used for: When the target water outlet mode is boiling water outlet mode, if the heating power of the instant heating module is detected to reach the maximum working power of the instant heating module, the first actual water outlet temperature of the instant heating module collected by the second temperature sampling module is periodically acquired. If the first actual outlet water temperature is lower than the target boiling water temperature, then the speed of the water pump is reduced.

8. The drinking water device as described in claim 7, characterized in that, The control module is also used for: After controlling the instant heating module to operate at the second target heating power, the second actual outlet water temperature of the instant heating module collected by the second temperature sampling module is periodically acquired. If the second actual outlet water temperature is greater than the target hot water temperature, then reduce the heating power of the instant heating module; If the second actual outlet water temperature is lower than the target hot water temperature, then the heating power of the instant heating module is increased.

9. The drinking water device according to any one of claims 1 to 8, characterized in that, The control module is used for: When the target water output mode is boiling water output mode, adjust the opening of the mixing valve to be fully closed at the first water inlet and fully open at the second water inlet, and control the instant heating module to start working. When the target water output mode is hot water output mode, the opening degree of the mixing valve at the first water inlet is adjusted to a first preset opening degree and the opening degree at the second water inlet is adjusted to a second preset opening degree, and the instant heating module is controlled to start working. When the target water output mode is cold water output mode, adjust the opening of the mixing valve to be fully open at the first water inlet and fully closed at the second water inlet, and control the instant heating module to stop working.

10. The drinking water device as described in claim 9, characterized in that, The control module is used for: Obtain the initial inlet water temperature at the water inlet of the instant heating module when the drinking water device enters the hot water dispensing mode; Based on the initial inlet water temperature and the target hot water temperature, with the goal of adjusting the temperature difference between the target hot water temperature and the inlet water temperature of the instant heating module to be within a preset temperature difference range, the first preset opening degree and the second preset opening degree are determined.

11. The drinking water device according to any one of claims 1 to 8, characterized in that, The drinking water device also includes: The third temperature sampling module is installed on the phase change heat storage module and is used to collect the temperature of the phase change heat storage module; A cast aluminum heating tube is installed on the phase change heat storage module and is used to heat the phase change material in the phase change heat storage module; The control module is also electrically connected to the third temperature sampling module and the cast aluminum heating tube, and the control module is further used for: When the water drinking device is in standby mode, the first temperature of the phase change heat storage module collected by the third temperature sampling module is obtained; If the first temperature is greater than or equal to the melting point temperature of the phase change material in the phase change heat storage module, then the phase change heat storage module is controlled to enter the heat preservation mode. If the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module, then the cast aluminum heating tube is controlled to start working.

12. The drinking water device as described in claim 11, characterized in that, The drinking water device further includes a fourth temperature sampling module installed on the cast aluminum heating tube, and the fourth temperature sampling module is electrically connected to the control module. The control module is also used for: When the first temperature is lower than the melting point temperature of the phase change material in the phase change heat storage module, the second temperature of the cast aluminum heating tube collected by the fourth temperature sampling module is obtained. If the second temperature is less than the preset safe temperature threshold, the cast aluminum heating tube is controlled to start working. If the second temperature is greater than or equal to the preset safe temperature threshold, the cast aluminum heating tube is controlled to stop working.

13. A control method for a drinking water device, characterized in that, The method, applied to a drinking device as described in any one of claims 1 to 12, comprises: Monitor the current target water dispensing mode of the drinking water device; According to the target water output mode, adjust the opening degree of the mixing valve at the first water inlet and the opening degree at the second water inlet in the drinking water device, and control the instant heating module in the drinking water device to start or stop working.

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