Liquid heating device and method of temperature control thereof

Abstract

This invention relates to the field of household appliances, providing a liquid heating device and its temperature control method. The liquid heating device includes a water tank assembly, a circulating water passage, a liquid heating component, a drinking water passage, and a heat exchange component. The water tank assembly has a first liquid storage chamber suitable for storing a liquid medium. Both ends of the circulating water passage are connected to the first liquid storage chamber. The liquid heating component has a second liquid storage chamber suitable for heating the liquid medium, and the drinking water passage is connected to the second liquid storage chamber. The heat exchange component is coupled between the circulating water passage and the drinking water passage, and is used to cool the drinking water passage. This application enables precise control of the outlet water temperature according to user needs, and at the same time, it can effectively improve the energy recycling rate to achieve energy saving.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more particularly to a liquid heating device and its temperature control method. Background Technology

[0002] An instant hot water bottle (or kettle) is a heating tool that uses a heater to quickly heat a portion of water, allowing users to obtain hot water quickly.

[0003] Existing instant hot water kettles have low capacity, requiring repeated refills and are inconvenient to use. Furthermore, while they achieve rapid cooling by adding a semiconductor cooling element to the heated, warm water storage tank, requiring the user to press a freeze switch to activate the cooling element and directly cool the warm water to a suitable temperature before opening the ice-cold water valve. Although this achieves rapid cooling, the separate cooling device consumes a significant amount of energy, resulting in high energy consumption and being detrimental to energy conservation and environmental protection. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention proposes a liquid heating device and its temperature control method, which enables precise control of the outlet water temperature according to user needs, while effectively improving energy recycling efficiency to achieve energy savings.

[0005] A liquid heating device according to the present invention includes: A water tank assembly having a first liquid storage chamber suitable for storing a liquid medium; A circulating water passage, both ends of which are connected to the first liquid storage chamber; A liquid heating assembly having a second liquid storage chamber suitable for heating a liquid medium. A drinking water passage, wherein the drinking water passage is connected to the second liquid storage chamber; A heat exchange component is coupled between the circulating water passage and the drinking water passage, and the heat exchange component is adapted to cool the drinking water passage.

[0006] According to one embodiment of the present invention, the liquid heating device further includes a water replenishment passage, which is connected between the first liquid storage chamber and the second liquid storage chamber.

[0007] According to one embodiment of the present invention, the inlet end of the water replenishment passage is connected to the first liquid storage chamber through the circulating water passage, and the outlet end of the water replenishment passage is connected to the second liquid storage chamber through the drinking water passage.

[0008] According to an embodiment of the present invention, the liquid heating assembly includes a liquid heating container and a base, the second liquid storage chamber is located inside the liquid heating container, the liquid heating container is detachably connected to the base, and the drinking water passage communicates with the liquid heating container through the base.

[0009] According to an embodiment of the present invention, the water tank assembly includes a water tank and a base, the first liquid storage chamber is located inside the water tank, the water tank is detachably connected to the base, and one end of the circulating water passage communicates with the water tank through the base.

[0010] The present invention further provides a control method for a liquid heating apparatus, comprising the following steps: Taking the target heating temperature set by the user as T1, the temperature of the liquid medium in the current second liquid storage chamber detected by the first temperature measuring assembly is t1; If the temperature t1 of the liquid medium in the current first liquid storage chamber detected by the first temperature measuring assembly is lower than T1, the heating device is started until the temperature t1 of the liquid medium in the current first liquid storage chamber detected by the first temperature measuring assembly is greater than or equal to T1, then the heating device is turned off; If the temperature t1 of the liquid medium in the current first liquid storage chamber detected by the first temperature measuring assembly is greater than or equal to T1, the heating device is not started.

[0011] According to an embodiment of the present invention, in response to the user selecting the first water outlet to directly output the liquid medium in the second liquid storage chamber, the first water pumping assembly is started, the second electromagnetic valve assembly is started and adjusted, the first water pumping assembly is directly started, or the first water pumping assembly is started after the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first electromagnetic valve assembly, so as to select the first water outlet section for water output.

[0012] According to an embodiment of the present invention, taking the target outlet water temperature T2 set by the user, the current temperature of the liquid medium in the first liquid storage chamber detected by the first temperature measuring assembly is t1; If t1 equals T2, the first water pumping assembly is directly started, or after the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first electromagnetic valve assembly, the first water pumping assembly is started, the second electromagnetic valve assembly is started and adjusted, and the first water outlet section is selected for water output; If t1>T2, the temperature t2 of the liquid medium in the second liquid storage chamber is detected by the second temperature measurement assembly, wherein if t2<T2, the first water pumping assembly and the second water pumping assembly are directly started, or the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first solenoid valve assembly, and after the first solenoid valve assembly opens the circulating water passage flowing through the heat exchange assembly, the first water pumping assembly and the second water pumping assembly are started; the second solenoid valve assembly is started and adjusted to select the second water outlet section for water discharge, and at the same time, by adjusting the flow ratio between the first water pumping assembly and the second water pumping assembly, the real-time outlet water temperature is made equal to the target outlet water temperature T2 set by the user; if t2≥T2, the user is reminded to replace the liquid medium in the water tank assembly; If t1>T2, the user is prompted to start the liquid heating assembly.

[0013] According to an embodiment of the present invention, adjusting the flow ratio between the first water pumping assembly and the second water pumping assembly includes: When (t1+t2) / 2=T2, the flow rate of the first water pumping assembly is V1, the flow rate of the second water pumping assembly is V2, and V1=V2; When (t1-T2)<(T2-t2), the flow rate V1' of the first water pumping assembly ≥ V1, and the flow rate V2' of the second water pumping assembly ≤ V2; When (t1-T2)>(T2-t2), the flow rate V1' of the first water pumping assembly ≤ V1, and the flow rate V2' of the second water pumping assembly ≥ V2.

[0014] According to an embodiment of the present invention, the liquid medium in the second liquid storage chamber is directly discharged from the first water outlet according to a user's selection; the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first solenoid valve assembly; the first water pumping assembly is started, the second solenoid valve assembly is started and adjusted to select the first water outlet section for water discharge.

[0015] According to an embodiment of the present invention, the second liquid storage chamber is replenished with the liquid medium in the water tank according to a user's selection; The second solenoid valve assembly is controlled to disconnect the communication between the drinking water passage and the first water outlet section as well as between the drinking water passage and the second water outlet section; The first solenoid valve assembly is controlled to communicate the water replenishing passage with the circulating water passage, and simultaneously disconnect the circulating water passage flowing through the heat exchange assembly; The second water pumping assembly is started to pump the liquid medium in the water tank into the second liquid storage chamber.

[0016] The above one or more technical solutions in the embodiments of the present invention at least achieve one of the following technical effects: This application achieves rapid heating of water to boiling and rapid cooling to a suitable temperature by coupling heat exchange components to the circulating water passage and the drinking water passage, through circulating heat exchange, which can effectively improve the energy recycling rate and achieve the purpose of saving energy.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the connection relationship of an embodiment of the liquid heating device provided in this invention.

[0020] Figure 2 This is a schematic diagram of the connection relationship of another embodiment of the liquid heating device provided in this invention.

[0021] Figure label: 10. Liquid heating device; 100. Water tank assembly; 110. Water tank; 111. First liquid storage chamber; 120. Base; 130. Circulating water passage; 131. Return water inlet; 140. Water replenishment passage; 150. First solenoid valve assembly; 160. Second water pump assembly; 170. Second temperature measuring assembly; 200, Liquid heating assembly; 210, Liquid heating container; 211, Second liquid storage chamber; 220, Base; 221, Heating element; 230, Drinking water passage; 231, First water outlet section; 231a, First water outlet; 232, Second water outlet section; 232a, Second water outlet; 240, Second solenoid valve assembly; 250, First water pump assembly; 260, First temperature measuring assembly; 270, Mechanical water valve; 280, Electrical coupling connector; 300. Heat exchange components; 400. Electronic control components. Detailed Implementation

[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0025] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] An instant hot water bottle (or kettle) is a heating tool that uses a heater to quickly heat a portion of water, allowing users to obtain hot water quickly.

[0028] Existing instant hot water kettles have low capacity, requiring repeated refills and are inconvenient to use. Furthermore, while they achieve rapid cooling by adding a semiconductor cooling element to the heated, warm water storage tank, requiring the user to press a freeze switch to activate the cooling element and directly cool the warm water to a suitable temperature before opening the ice-cold water valve. Although this achieves rapid cooling, the separate cooling device consumes a significant amount of energy, resulting in high energy consumption and being detrimental to energy conservation and environmental protection.

[0029] The following is combined with Figure 1 and Figure 2 The liquid heating device and its temperature control method provided in this invention will be described in detail through specific embodiments and application scenarios.

[0030] In this embodiment of the invention, reference is made to Figure 1 and Figure 2 The liquid heating device 10 includes a water tank assembly 100, a circulating water passage 130, a liquid heating component 200, a drinking water passage 230, and a heat exchange component 300. The water tank assembly 100 has a first liquid storage chamber 111, which is suitable for storing liquid media. Both ends of the circulating water passage 130 are connected to the first liquid storage chamber 111. The liquid heating component 200 has a second liquid storage chamber 211, which is suitable for heating liquid media. The drinking water passage 230 is connected to the second liquid storage chamber 211. The heat exchange component 300 is coupled between the circulating water passage 130 and the drinking water passage 230 and is suitable for cooling the drinking water passage 230.

[0031] In this embodiment, the water tank assembly 100 serves as the liquid storage center of the entire device, and the first liquid storage chamber 111 is responsible for storing the liquid medium (such as drinking water) to be heated and supplied. This ensures that the device can meet the user's continuous needs with a certain amount of liquid medium and provides the basis for liquid heating and heat exchange.

[0032] The circulating water passage 130 connects the two ends of the first liquid storage chamber 111, allowing the water in the first liquid storage chamber 111 to form a circulating flow path. When hot water is cooled by the heat exchange component 300, the cold water in the first liquid storage chamber 111 travels through the circulating water passage 130 to the heat exchange component 300 to exchange heat with the hot water in the drinking water passage 230, absorbs heat, and then returns to the first liquid storage chamber 111. The circulating water passage 130 ensures that the water in the first liquid storage chamber 111 can continuously participate in the heat exchange process, maintaining a stable water temperature, and also facilitates the user to replenish the water in the first liquid storage chamber 111 into the liquid heating component 200 for heating.

[0033] The inlet of the circulating water passage 130 is connected to the bottom of the first liquid storage chamber 111, while the outlet of the circulating water passage 130, i.e. the return water port 131, is connected to the top of the first liquid storage chamber 111. The hot water and cold water in the first liquid storage chamber 111 will achieve the effect of hot at the top and cold at the bottom due to the temperature difference, and the lower temperature liquid medium will be continuously input into the circulating water passage 130 for cooling.

[0034] The second liquid storage chamber 211 in the liquid heating assembly 200 is a space for heating the liquid medium. The user adds water that needs to be heated into the second liquid storage chamber 211, and the water is heated to boiling by the heating element 221.

[0035] The drinking water passage 230 connects the second liquid storage chamber 211 and the water outlet, delivering heated water to the user. Simultaneously, the drinking water passage 230 also serves as a crucial channel for heat exchange in the heat exchange component 300, allowing the hot water to release some heat to the liquid medium in the circulating water passage 130 before flowing out, thereby cooling the liquid medium in the drinking water passage 230.

[0036] The drinking water passage 230 ensures that the heated water can be smoothly guided to the cooling stage, while also providing a channel for hot water output.

[0037] The heat exchange component 300 is coupled between the circulating water passage 130 and the drinking water passage 230. Its purpose is to use the cold water in the first liquid storage chamber 111 as a cooling medium and, through the principle of heat exchange, to quickly cool the hot water in the drinking water passage 230 to a suitable drinking temperature.

[0038] Among them, the heat exchange component 300 adopts materials such as metal pipes and metal plates to realize the heat transfer between hot water in the drinking water passage 230 and cold water in the circulating water passage 130.

[0039] Reference Figure 2 In one embodiment, the liquid heating device 10 further includes a water replenishment passage 140, which connects the first liquid storage chamber 111 and the second liquid storage chamber 211. The main function of the water replenishment passage 140 is to enable automatic water replenishment to the second liquid storage chamber 211. When the water level in the second liquid storage chamber 211 drops to a certain level, the water replenishment passage 140 automatically opens, allowing water from the first liquid storage chamber 111 to flow into the second liquid storage chamber 211 for replenishment. This reduces the number of times the user needs to manually add water and improves ease of use.

[0040] This application provides a water replenishment passage 140 between the water tank assembly 100 and the liquid heating assembly 200. Users can automatically replenish water from the water tank assembly 100 to the liquid heating assembly 200 as needed, improving replenishment efficiency and reducing the number of times users need to repeatedly draw water, thus enhancing user convenience. Simultaneously, by coupling a heat exchange assembly 300 to the circulating water passage 130 and the drinking water passage 230, rapid heating of water to boiling and subsequent rapid cooling to a suitable temperature is achieved through circulating heat exchange, effectively improving energy recycling efficiency and achieving energy savings.

[0041] Reference Figure 2 According to one embodiment of the present invention, the inlet end of the water replenishment passage 140 is connected to the first liquid storage chamber 111 through the circulating water passage 130, and the outlet end of the water replenishment passage 140 is connected to the second liquid storage chamber 211 through the drinking water passage 230.

[0042] It is understood that in this embodiment, the water replenishment passage 140 is indirectly connected to the first liquid storage chamber 111 and the second liquid storage chamber 211 through the circulating water passage 130 and the drinking water passage 230. This reduces the number of independent pipes, lowering the system's complexity and manufacturing cost. It also avoids the risk of leakage that might arise from excessive pipe connections. Furthermore, since the water replenishment passage 140 is connected to the circulating water passage 130 and the drinking water passage 230, the water replenishment function can be more easily integrated into the overall system's control logic. Through a unified control system, precise control and monitoring of the water replenishment process can be achieved, thereby improving the system's operating efficiency and stability. Simultaneously, in terms of maintenance, since the water replenishment passage 140 is connected to other passages, overall inspection and repair can be performed more conveniently, reducing maintenance costs and time.

[0043] Reference Figure 2 According to one embodiment of the present invention, the liquid heating device 10 includes a first solenoid valve assembly 150, and the water inlet end of the water supply passage 140 is connected to the circulating water passage 130 through the first solenoid valve assembly 150.

[0044] It is understood that in this embodiment, the opening and closing of the water supply passage 140 and the circulating water passage 130 can be conveniently controlled by setting the first solenoid valve assembly 150; at the same time, by controlling the opening and closing state of the first solenoid valve assembly, the flow rate of the water supply passage 140 can be precisely adjusted to ensure that an appropriate amount of water is added to the second liquid storage chamber 211 when needed, while avoiding over-watering or under-watering, which helps to improve the stability and efficiency of the system.

[0045] Reference Figure 1 and Figure 2According to one embodiment of the present invention, a first pump assembly 250 is provided on the drinking water passage 230, and the first pump assembly 250 is adapted to regulate the water flow rate of the drinking water passage 230; a second pump assembly 160 is provided on the circulating water passage 130, and the second pump assembly 160 is adapted to regulate the water flow rate of the circulating water passage 130; wherein, the inlet end of the water replenishment passage 140 is connected to the rear end of the second pump assembly 160, and the outlet end of the water replenishment passage 140 is connected to the front end of the first pump assembly 250.

[0046] It is understood that in this embodiment, by providing a first pump assembly 250 on the drinking water passage 230, the speed at which hot water passes through the heat exchange assembly 300 can be controlled by adjusting the operating state of the pump assembly, thereby affecting the cooling effect of the hot water. Thus, by adjusting the first pump assembly 250, precise control of the hot water temperature can be achieved, ensuring that users can obtain hot water at the desired temperature. Simultaneously, the first pump assembly 250 can also be used to control the on / off state of the drinking water passage 230.

[0047] Specifically, when a user needs hot water at high temperatures, the first pump water assembly 250 can be adjusted to a higher flow rate, allowing hot water to quickly pass through the heat exchange assembly 300, reducing the contact time with cold water and thus maintaining a higher water temperature. When a user needs warm water, the first pump water assembly 250 can be adjusted to a lower flow rate, allowing the hot water to stay in the heat exchange assembly 300 for a longer time, increasing the heat exchange area with cold water, thereby achieving a better cooling effect.

[0048] The second pump assembly 160 is installed on the circulating water passage 130 and is used to regulate the water flow rate through the circulating water passage 130. By adjusting the operating state of the pump assembly, the speed at which cold water in the first liquid storage chamber 111 passes through the heat exchange component 300 can be controlled, thereby affecting the hot water cooling effect. This achieves precise control of the hot water temperature, ensuring that users can obtain hot water at the required temperature. Simultaneously, the second pump assembly 160 can also be used to control the on / off state of the circulating water passage 130.

[0049] Specifically, when a user requires high-temperature hot water, the second pump assembly 160 can be adjusted to a lower flow rate, slowing down the flow of cold water in the first storage chamber 111 through the heat exchange assembly 300, reducing the contact time with the hot water, and thus maintaining a higher water temperature. When a user requires warm water, the second pump assembly 160 can be adjusted to a higher flow rate, accelerating the flow of cold water in the first storage chamber 111 through the heat exchange assembly 300, increasing the contact time with the hot water, and thus achieving a better cooling effect.

[0050] The first pump assembly 250 regulates the flow rate of hot water in the drinking water passage 230, while the second pump assembly 160 regulates the flow rate of cold water in the circulating water passage 130. The two work together to determine the rate at which the hot water cools down and its final temperature.

[0051] This implementation connects the inlet of the water supply passage 140 to the rear end of the second pump assembly 160, and the outlet of the water supply passage 140 to the front end of the first pump assembly 250. This allows the water supply passage 140 to share the second pump assembly 160 with the circulating water passage 130, thereby reducing the number of pump assemblies and improving integration. Simultaneously, the first pump assembly 250 can shut off the drinking water output during water supply, improving the reliability of the device.

[0052] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the drinking water passage 230 includes a first water outlet section 231 and a second water outlet section 232. The first water outlet section 231 is provided with a first water outlet 231a at its end, and the second water outlet section 232 is provided with a second water outlet 232a at its end. The heat exchange component 300 is coupled to the second water outlet section 232.

[0053] Understandably, dividing the drinking water passage 230 into a first outlet section 231 and a second outlet section 232 allows the water to undergo different treatment stages during its outflow, thereby improving the flexibility and controllability of the device.

[0054] Specifically, the first outlet 231aa is located at the end of the first outlet section 231 and can be used directly to supply hot water without heat exchange treatment, or as a backup outlet. This provides users with more options, allowing them to choose higher temperature hot water as needed.

[0055] The second water outlet 232aa is located at the end of the second water outlet section 232. Since the second water outlet section 232 is coupled to the heat exchange component 300, the water supplied by this outlet is water that has undergone heat exchange treatment and is at a more suitable temperature, in order to meet the daily drinking water needs of most users.

[0056] In this embodiment, the heat exchange component 300 is coupled to the second water outlet section 232. Hot water undergoes cooling treatment via the heat exchange component 300 before flowing out to the second water outlet 232aa. This ensures that the water flowing out of the second water outlet 232aa remains within a suitable temperature range, improving user comfort. By cooling the hot water in the second water outlet section 232 through the heat exchange component 300, the water in the circulating water passage 130 is simultaneously heated, achieving effective heat recovery and utilization. This design reduces energy waste and improves the system's energy efficiency.

[0057] Of course, in other embodiments, the drinking water passage 230 may be provided with only one outlet or two or more outlets. No special limitation is made here, and the arrangement can be made according to specific needs.

[0058] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, a second solenoid valve assembly 240 is provided between the first water outlet section 231 and the second water outlet section 232. The second solenoid valve assembly 240 is adapted to control the on / off state of the first water outlet section 231 and the second water outlet section 232.

[0059] Understandably, the second solenoid valve assembly 240 is installed at the junction between the first outlet section 231 and the second outlet section 232 to control the direction of water flow. When the solenoid valve opens or closes, it determines whether hot water flows out from the first outlet section 231 or the second outlet section 232. Thus, through the control of the solenoid valve, the user can select the hot water temperature according to actual needs, thereby improving the flexibility and convenience of the device.

[0060] Specifically, when high-temperature hot water is needed, the second solenoid valve assembly 240 closes the second outlet section 232, allowing hot water to flow only through the first outlet section 231 from the first outlet 231aa. When warm water is needed, the second solenoid valve assembly 240 closes the first outlet section 231, allowing the hot water to enter the heat exchange assembly 300 through the second outlet section 232 for cooling before flowing out from the second outlet 232aa.

[0061] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the liquid heating assembly 200 includes a liquid heating container 210 and a base 220, a second liquid storage chamber 211 is located inside the liquid heating container 210, the liquid heating container 210 is detachably connected to the base 220, and the drinking water passage 230 is connected to the liquid heating container 210 through the base 220.

[0062] It is understood that the liquid heating container 210 is used to store the liquid medium to be heated (such as drinking water), and the second liquid storage chamber 211 is located inside the liquid heating container 210 and is used to heat the liquid medium.

[0063] The base 220 serves as a support structure for the liquid heating container 210 and also as a bridge connecting the heating element and the water tank assembly 100. Through the base 220, the drinking water passage 230 is connected to the second liquid storage chamber 211 inside the liquid heating container 210. The base 220 not only provides stable support but also ensures the correct connection between the heating element and the water tank assembly 100.

[0064] The liquid heating container 210 is detachably connected to the base 220, allowing users to easily remove the liquid heating container 210 from the base 220 for adding, emptying, and cleaning the second liquid storage chamber 211. This improves the ease of use and cleanliness of the device, ensuring that users can always obtain a clean second liquid storage chamber 211.

[0065] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the liquid heating assembly 200 further includes a mechanical water valve 270, which is located at the hot water outlet of the liquid heating container 210. The mechanical water valve 270 is adapted to control the connection and disconnection between the drinking water passage 230 and the liquid heating container 210 when the liquid heating container 210 is connected or separated from the seat 220.

[0066] It is understandable that there is a mechanical water valve (with an internal spring valve core) at the bottom of the liquid heating container, and a push rod at the corresponding position on the seat.

[0067] When the liquid heating container is placed on the base, the push rod will push the spring valve core in the mechanical valve to move, and the liquid heating container will be connected to the water passage of the base.

[0068] When the liquid heating container is separated from the base, the spring valve core in the mechanical valve resets, closing the water outlet at the bottom of the liquid heating container.

[0069] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the liquid heating assembly 200 further includes an electrical coupling connector 280, which is respectively disposed on the liquid heating container 210 and the base 220 to realize the electrical connection between the liquid heating container 210 and the base 220.

[0070] When the liquid heating container 210 is removed from the base 220, the electrical coupling connector 280 disconnects, severing the electrical connection between the liquid heating container 210 and the base 220.

[0071] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the water tank assembly 100 includes a water tank 110 and a base 120, a first liquid storage chamber 111 is located inside the water tank 110, the water tank 110 is detachably connected to the base 120, and one end of the circulating water passage 130 is connected to the water tank 110 through the base 120.

[0072] Understandably, the detachable connection between the water tank 110 and the base 120 makes the entire water tank assembly 100 more modular, facilitating maintenance and cleaning. When it is necessary to clean the inside of the water tank 110 or inspect the connecting parts of the base 120, the user can easily remove the water tank 110 from the base 120, complete the necessary work, and then reinstall it. This improves the ease of use and cleanliness of the device.

[0073] Of course, in other embodiments, the water tank assembly 100 may also include a lid and a handle, etc.

[0074] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the liquid heating assembly 200 further includes a first temperature measuring assembly 260, which is adapted to detect the temperature of the liquid medium in the second liquid storage chamber 211.

[0075] Understandably, the first temperature sensing component 260 is installed inside the second liquid storage chamber 211 to monitor the temperature of the liquid medium within the chamber in real time. During the heating phase, the first temperature sensing component 260 monitors the water temperature in the second liquid storage chamber 211 in real time and feeds the data back to the control system. When the detected water temperature reaches a preset value, the control system sends a command to stop heating. During the cooling phase, based on the user's selected desired hot water mode, the heated hot water enters the heat exchange component 300 through the second outlet section 232 for cooling. The first temperature sensing component 260 continues to monitor the temperature of the remaining hot water in the second liquid storage chamber 211. The control system adjusts the operating status of the first water pump component 250 and the second water pump component 160 based on the temperature data to ensure that the hot water achieves the expected cooling effect when passing through the heat exchange component 300. Users can accurately obtain hot water at the desired temperature, improving the product's user experience.

[0076] Reference Figure 1 and Figure 2 The water tank assembly 100 also includes a second temperature measuring assembly 170, which is suitable for detecting the temperature of the liquid medium in the first liquid storage chamber 111.

[0077] Understandably, the second temperature sensing component 170 is installed inside the first liquid storage chamber 111 of the water tank assembly 100 to monitor the temperature of the liquid medium (usually cold water) inside the first liquid storage chamber 111 in real time. Using the data acquired by the second temperature sensing component 170, the control system can precisely control the heat exchange process, ensuring that the hot water can be quickly cooled to a suitable drinking temperature. The temperature data provided by the second temperature sensing component 170 is the foundation for achieving precise temperature control, ensuring that users can obtain hot water at the required temperature and effectively utilize the cold water inside the first liquid storage chamber 111 for heat exchange.

[0078] Specifically, based on the user's selected hot / warm water mode, the heated water will enter the heat exchange component 300 for cooling through the second outlet section 232. The second temperature sensing component 170 monitors the temperature of the cold water in the first liquid storage chamber 111 in real time and feeds the data back to the control system. The control system adjusts the operating states of the first pumping component 250 and the second pumping component 160 based on the temperature of the hot water in the second liquid storage chamber 211 (provided by the first temperature sensing component 260) and the temperature of the cold water in the first liquid storage chamber 111 (provided by the second temperature sensing component 170) to ensure that the hot water achieves the expected cooling effect when passing through the heat exchange component 300. By monitoring the temperature of the cold water in the first liquid storage chamber 111 in real time, the control system can optimize the use of cold water and reduce unnecessary energy consumption.

[0079] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, the liquid heating device 10 further includes an electronic control component 400, which is communicatively connected to the water tank assembly 100 and the liquid heating assembly 200.

[0080] It is understood that in this embodiment, the electronic control component 400 is used to receive user commands and coordinate the operation of various components according to the commands to ensure that the device can operate according to the user's needs. Through the centralized management and coordinated control of the electronic control component 400, the heating and cooling processes are automated and intelligent, improving the user experience and the efficiency of the device.

[0081] The electronic control component 400 can obtain the temperature of the cold water in the first liquid storage chamber 111 through the second temperature measuring component 170. Based on the temperature difference between the cold water in the first liquid storage chamber 111 and the hot water in the second liquid storage chamber 211, the electronic control component 400 can adjust the flow rates of the first water pump component 250 and the second water pump component 160 to regulate the heat exchange efficiency.

[0082] The electronic control component 400 can obtain the temperature of the liquid medium in the second liquid storage chamber 211 through the first temperature sensing component 260, and control the start and stop of the heating component according to the target temperature set by the user. At the same time, the electronic control component 400 can control the first water pump component 250 and the second water pump component 160 to achieve selective flow of hot water at different temperatures.

[0083] This implementation achieves automated control of the heating and cooling processes through the setting of the electronic control component 400, thereby improving the intelligence level of the device.

[0084] Reference Figure 1In another aspect, a temperature control method for a liquid heating apparatus 10 includes the following steps: according to the target outlet water temperature T2 set by the user, the current temperature of the liquid medium in the first liquid storage cavity 111 is detected as t1 by the first temperature measurement assembly 260; if t1=T2, the passage between the first liquid storage cavity and the second liquid storage cavity is disconnected by the first solenoid valve assembly 150, the first water pumping assembly 250 is started, the second solenoid valve assembly 240 is started and adjusted, and the first water outlet section 231 is selected for water outlet; if t1>T2, the temperature t2 of the liquid medium in the second liquid storage cavity 211 is detected by the second temperature measurement assembly 150, wherein if t2<T2, the passage between the first liquid storage cavity and the second liquid storage cavity is disconnected by the first solenoid valve assembly 150, the first solenoid valve assembly 150 is controlled to open the circulating water passage flowing through the heat exchange assembly, the first water pumping assembly 250 and the second water pumping assembly 160 are started, the second solenoid valve assembly 240 is started and adjusted, the second water outlet section 232 is selected for water outlet, and at the same time, by adjusting the flow ratio between the first water pumping assembly 250 and the second water pumping assembly 160, the real-time outlet water temperature is made equal to the target outlet water temperature T2 set by the user; if t2≥T2, the user is reminded to replace the liquid medium in the water tank assembly 100; if t1>T2, the user is prompted to start the liquid heating assembly 200.

[0085] It can be understood that in the present application, the cold water temperature t1 in the first liquid storage cavity 111 is detected by the first temperature measurement assembly 260, and the hot water temperature t2 in the second liquid storage cavity 211 is detected by the second temperature measurement assembly 150. According to the target outlet water temperature T2 set by the user and the detected temperature data, the system can precisely control the flow rates of the first water pumping assembly 250 and the second water pumping assembly 160, as well as the selection of the water outlet section, so as to control the outlet water temperature.

[0086] If t1 is equal to T2, cold water is directly used as outlet water, the first water pumping assembly 250 and the second solenoid valve assembly 240 are started, and the first water outlet section 231 is selected for water outlet.

[0087] If t1 is greater than T2, hot water needs to be used for cooling. If t2 is less than T2, the first water pumping assembly 250 and the second water pumping assembly 160 are started, the second water outlet section 232 is selected for water outlet, and by adjusting the flow ratio of the two water pumping assemblies, the real-time outlet water temperature is made equal to T2.

[0088] If t2 is greater than or equal to T2, it indicates that the water in the water tank 110 is already overheated, and the user needs to be reminded to replace the water in the water tank 110.

[0089] If t1 is greater than T2 but there is no hot water in the second liquid storage cavity 211, the user needs to be prompted to start the liquid heating assembly 200 to heat the water.

[0090] In this way, the system can automatically control the outlet water temperature according to the target outlet water temperature set by the user, without the need for manual adjustment by the user. In addition, the system will give corresponding prompts based on the temperature data, helping the user understand the state of the device and providing operation suggestions.

[0091] In one embodiment, the target heating temperature set by the user is T1, and the temperature of the liquid medium in the current second liquid storage chamber 211 detected by the first temperature measurement assembly 260 is t1; if the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is lower than T1, the heating device is started until the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is greater than or equal to T1, then the heating device is turned off; if the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is greater than or equal to T1, the heating device is not started.

[0092] It can be understood that the user can set the target heating temperature T1 according to their own needs. The system monitors the temperature t1 of the water in the second liquid storage chamber 211 in real time through the first temperature measurement assembly 260. If t1 is less than T1, the heating device is started to heat the water until t1 reaches or exceeds T1. If t1 has already reached or exceeded T1, the heating device is not started to avoid overheating and energy waste. The entire heating process is automatically controlled by the system, no manual operation is required from the user, which is convenient and fast. The system intelligently controls the start and stop of the heating device based on the temperature data fed back by the temperature sensor, ensuring that the water temperature is always kept within the target range set by the user. By precisely controlling the heating process, overheating is avoided, thereby saving energy.

[0093] In some embodiments, according to the user's selection that the first water outlet 231a directly discharges the liquid medium in the second liquid storage chamber 211, the first solenoid valve assembly 150 disconnects the passage between the first liquid storage chamber and the second liquid storage chamber; the first water pumping assembly 250 is started, and the second solenoid valve assembly 240 is started and adjusted to select the first water outlet section 231 for water discharge.

[0094] It can be understood that the user can select different water outlet modes according to their own needs. If the user needs to directly use the hot water in the second liquid storage chamber 211 that has not undergone heat exchange treatment, the first water outlet 231a can be selected for water discharge. By starting the first water pumping assembly 250, the flow rate of the hot water can be controlled to ensure that the user obtains the required amount of water. By starting and adjusting the second solenoid valve assembly 240, the first water outlet section 231 can be selected for water discharge, preventing hot water from flowing out of the second water outlet section 232. Users can select different water outlet modes and water volumes according to different needs to meet different usage scenarios.

[0095] According to one embodiment of the present invention, adjusting the flow ratio between the first pump assembly 250 and the second pump assembly 160 includes: when (t1+t2) / 2=T2, the flow rate of the first pump assembly 250 is V1, the flow rate of the second pump assembly 160 is V2, and V1=V2; when (t1-T2)<(T2-t2), the flow rate of the first pump assembly 250 is V1'≥V1, and the flow rate of the second pump assembly 160 is V2'≤V2; when (t1-T2)>(T2-t2), the flow rate of the first pump assembly 250 is V1'≤V1, and the flow rate of the second pump assembly 160 is V2'≥V2.

[0096] It is understandable that when (t1+t2) / 2=T2, it means that the hot and cold water temperatures are moderate or the heat exchange component 300 has good capacity, and convection can be carried out at the same flow rate. At this time, V1=V2.

[0097] When (t1-T2)<(T2-t2), it indicates that the cold water temperature is too high. It is necessary to increase the hot water flow rate V1' and decrease the cold water flow rate V2' so that the outlet water temperature reaches T2.

[0098] When (t1-T2)>(T2-t2), it indicates that the cold water temperature is low. It is necessary to reduce the hot water flow rate V1' and increase the cold water flow rate V2' so that the outlet water temperature reaches T2.

[0099] In this way, by adjusting the flow ratio of the two pump components, the mixing ratio of hot and cold water can be precisely controlled, thereby precisely controlling the outlet water temperature.

[0100] In one embodiment, the second storage chamber is replenished by the liquid medium in the water tank according to the user's selection; the second solenoid valve assembly 240 is controlled to disconnect the drinking water passage from the first water outlet section and the connection between the drinking water passage and the second water outlet section; the first solenoid valve assembly 150 is controlled to connect the water replenishment passage to the circulating water passage and disconnect the circulating water passage flowing through the heat exchange assembly; the second pump assembly is started to pump the liquid medium in the water tank into the second storage chamber.

[0101] Understandably, traditional liquid heating devices require users to manually add water. This solution, by incorporating a water replenishment pathway and a second solenoid valve, achieves automatic water replenishment, reducing the number of times users need to repeatedly add water and improving ease of use. Users can choose whether to activate the water replenishment function as needed, avoiding the tedious manual water addition and saving time and effort.

[0102] Reference Figure 2A temperature control method for a liquid heating device 10, comprising the following steps: taking T1 as the target heating temperature set by a user, detecting that the current temperature of the liquid medium in the second liquid storage chamber 211 is t1 through the first temperature measurement assembly 260; if the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is lower than T1, starting the heating device until the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is greater than or equal to T1, then turning off the heating device; if the temperature t1 of the liquid medium in the current first liquid storage chamber 111 detected by the first temperature measurement assembly 260 is greater than or equal to T1, the heating device is not started.

[0103] It can be understood that the user can set the target heating temperature T1 according to their own needs. The system monitors the temperature t1 of the water in the second liquid storage chamber 211 in real time through the first temperature measurement assembly 260. If t1 is lower than T1, the heating device is started to heat the water until t1 reaches or exceeds T1. If t1 has already reached or exceeded T1, the heating device is not started, so as to avoid overheating and energy waste. The entire heating process is automatically controlled by the system, and the user does not need to perform manual operations, which is convenient and fast. The system intelligently controls the start and stop of the heating device according to the temperature data fed back by the temperature sensor, ensuring that the water temperature is always kept within the target range set by the user. By precisely controlling the heating process, overheating is avoided, thereby saving energy.

[0104] In some embodiments, in response to the user selecting the first water outlet 231a to directly discharge the liquid medium in the second liquid storage chamber 211, the first water pumping assembly 250 is started, and the second electromagnetic valve assembly 240 is started and adjusted, so that the first water outlet section 231 is selected for water discharge.

[0105] It can be understood that the user can select different water discharge modes according to their own needs. If the user needs to directly use the hot water in the second liquid storage chamber 211 that has not undergone heat exchange treatment, the user can select the first water outlet 231a for water discharge. By starting the first water pumping assembly 250, the flow rate of the hot water can be controlled to ensure that the user obtains the required amount of water. By starting and adjusting the second electromagnetic valve assembly 240, the first water outlet section 231 can be selected for water discharge, preventing hot water from flowing out from the second water outlet section 232. The user can select different water discharge modes and water volumes according to different needs, to meet different usage scenarios.

[0106] In one embodiment, according to the target outlet water temperature T2 set by the user, the current temperature of the liquid medium in the first liquid storage chamber 111 is detected as t1 by the first temperature measuring assembly 260; if t1=T2, the first water pumping assembly 250 is started, the second solenoid valve assembly 240 is started and adjusted, and the first water outlet section 231 is selected for water outlet; if t1>T2, the temperature t2 of the liquid medium in the second liquid storage chamber 211 is detected by the second temperature measuring assembly 170, wherein if t2<T2, the first water pumping assembly 250 and the second water pumping assembly 160 are started, the second solenoid valve assembly 240 is started and adjusted, the second water outlet section 232 is selected for water outlet, and at the same time, by adjusting the flow ratio between the first water pumping assembly 250 and the second water pumping assembly 160, the real-time outlet water temperature is made equal to the target outlet water temperature T2 set by the user; if t2≥T2, the user is reminded to replace the liquid medium in the water tank assembly 100; if t1>T2, the user is prompted to start the liquid heating assembly 200.

[0107] It can be understood that the system detects the cold water temperature t1 in the first liquid storage chamber 111 through the first temperature measuring assembly 260, and detects the hot water temperature t2 in the second liquid storage chamber 211 through the second temperature measuring assembly 170. According to the target outlet water temperature T2 set by the user and the detected temperature data, the system can precisely control the flow rates of the first water pumping assembly 250 and the second water pumping assembly 160, as well as the selection of the water outlet section, so as to control the outlet water temperature.

[0108] If t1 is equal to T2, cold water is directly used as outlet water, the first water pumping assembly 250 and the second solenoid valve assembly 240 are started, and the first water outlet section 231 is selected for water outlet.

[0109] If t1 is greater than T2, hot water needs to be used for cooling. If t2 is less than T2, the first water pumping assembly 250 and the second water pumping assembly 160 are started, the second water outlet section 232 is selected for water outlet, and by adjusting the flow ratio of the two water pumping assemblies, the real-time outlet water temperature is made equal to T2.

[0110] If t2 is greater than or equal to T2, it indicates that the water in the water tank 110 is already overheated, and the user needs to be reminded to replace the water in the water tank 110.

[0111] If t1 is greater than T2 but there is no hot water in the second liquid storage chamber 211, the user needs to be prompted to start the liquid heating assembly 200 to heat the water.

[0112] In this way, the system can automatically control the outlet water temperature according to the target outlet water temperature set by the user, without the need for the user to manually adjust. Moreover, the system will give corresponding prompts according to the temperature data, helping the user understand the state of the device and providing operation suggestions.

[0113] According to one embodiment of the present invention, adjusting the flow ratio between the first pump assembly 250 and the second pump assembly 160 includes: when (t1+t2) / 2=T2, the flow rate of the first pump assembly 250 is V1, the flow rate of the second pump assembly 160 is V2, and V1=V2; when (t1-T2)<(T2-t2), the flow rate of the first pump assembly 250 is V1'≥V1, and the flow rate of the second pump assembly 160 is V2'≤V2; when (t1-T2)>(T2-t2), the flow rate of the first pump assembly 250 is V1'≤V1, and the flow rate of the second pump assembly 160 is V2'≥V2.

[0114] It is understandable that when (t1+t2) / 2=T2, it means that the hot and cold water temperatures are moderate or the heat exchange component 300 has good capacity, and convection can be carried out at the same flow rate. At this time, V1=V2.

[0115] When (t1-T2)<(T2-t2), it indicates that the cold water temperature is too high. It is necessary to increase the hot water flow rate V1' and decrease the cold water flow rate V2' so that the outlet water temperature reaches T2.

[0116] When (t1-T2)>(T2-t2), it indicates that the cold water temperature is low. It is necessary to reduce the hot water flow rate V1' and increase the cold water flow rate V2' so that the outlet water temperature reaches T2.

[0117] In this way, by adjusting the flow ratio of the two pump components, the mixing ratio of hot and cold water can be precisely controlled, thereby precisely controlling the outlet water temperature.

[0118] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A liquid heating apparatus, characterised in that, comprising: a water tank assembly, which is provided with a first liquid storage cavity, wherein the first liquid storage cavity is suitable for storing a liquid medium; a circulating water passage, wherein both ends of the circulating water passage are in communication with the first liquid storage cavity; a liquid heating assembly, which is provided with a second liquid storage cavity, wherein the second liquid storage cavity is suitable for heating the liquid medium, a drinking water passage, which is in communication with the second liquid storage cavity; a heat exchange assembly, which is coupled and connected between the circulating water passage and the drinking water passage, wherein the heat exchange assembly is suitable for cooling the drinking water passage.

2. The liquid heating device of claim 1, wherein, The liquid heating device further comprises a water replenishing passage, which is communicated between the first liquid storage cavity and the second liquid storage cavity.

3. The liquid heating device of claim 2, wherein, The water inlet end of the water replenishing passage is communicated with the first liquid storage cavity through the circulating water passage, and the water outlet end of the water replenishing passage is communicated with the second liquid storage cavity through the drinking water passage.

4. The liquid heating device of any one of claims 1-3, wherein, The liquid heating assembly comprises a liquid heating container and a base body, the second liquid storage cavity is located inside the liquid heating container, the liquid heating container is detachably connected with the base body, and the drinking water passage is communicated with the liquid heating container through the base body.

5. The liquid heating device according to any one of claims 1-3, characterized in that, The water tank assembly comprises a water tank and a base, the first liquid storage cavity is located inside the water tank, the water tank is detachably connected with the base, and one end of the circulating water passage is communicated with the water tank through the base.

6. A temperature control method, applied to the liquid heating device according to any one of claims 1 to 5, characterized in that, comprising the following steps: taking T1 as the target heating temperature set by a user, detecting that the current temperature of the liquid medium in the second liquid storage cavity is t1 by a first temperature measuring assembly; if the first temperature measuring assembly detects that the current temperature t1 of the liquid medium in the first liquid storage cavity is lower than T1, starting a heating device, until the first temperature measuring assembly detects that the current temperature t1 of the liquid medium in the first liquid storage cavity is greater than or equal to T1, turning off the heating device; if the first temperature measuring assembly detects that the current temperature t1 of the liquid medium in the first liquid storage cavity is greater than or equal to T1, the heating device is not started.

7. The temperature control method according to claim 6, characterized in that, According to the user's selection that a first water outlet directly discharges the liquid medium in the second liquid storage cavity, starting a first water pumping assembly, starting and adjusting a second electromagnetic valve assembly, directly starting the first water pumping assembly, or disconnecting the passage between the first liquid storage cavity and the second liquid storage cavity through a first electromagnetic valve assembly, then starting the first water pumping assembly, and selecting a first water outlet section for water discharge.

8. The temperature control method according to claim 6, characterized in that, Taking T2 as the target outlet water temperature set by the user, detecting that the current temperature of the liquid medium in the first liquid storage cavity is t1 by the first temperature measuring assembly; if t1=T2, directly starting the first water pumping assembly, or disconnecting the passage between the first liquid storage cavity and the second liquid storage cavity through the first electromagnetic valve assembly, then starting the first water pumping assembly, starting and adjusting the second electromagnetic valve assembly, and selecting the first water outlet section for water discharge; If t1 > T2, the temperature t2 of the liquid medium in the second liquid storage chamber is detected by the second temperature measuring assembly, wherein if t2 < T2, the first water pumping assembly and the second water pumping assembly are directly started, or the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first electromagnetic valve assembly, and the first electromagnetic valve assembly is controlled to open the circulating water passage flowing through the heat exchange assembly before starting the first water pumping assembly and the second water pumping assembly; the second electromagnetic valve assembly is started and adjusted to select the second water outlet section for water outlet, and meanwhile, by adjusting the flow ratio between the first water pumping assembly and the second water pumping assembly, the real-time outlet water temperature is made equal to the target outlet water temperature T2 set by the user; if t2 ≥ T2, the user is reminded to replace the liquid medium in the water tank assembly; If t1 > T2, the user is prompted to start the liquid heating assembly.

9. The temperature control method according to claim 8, characterized in that, Adjusting the flow ratio between the first water pumping assembly and the second water pumping assembly includes: When (t1+t2) / 2 = T2, the flow rate V1 of the first water pumping assembly and the flow rate V2 of the second water pumping assembly satisfy V1 = V2; When (t1-T2) < (T2-t2), the flow rate V1' of the first water pumping assembly is ≥ V1, and the flow rate V2' of the second water pumping assembly is ≤ V2; When (t1-T2) > (T2-t2), the flow rate V1' of the first water pumping assembly is ≤ V1, and the flow rate V2' of the second water pumping assembly is ≥ V2.

10. The temperature control method for the liquid heating device according to claim 6, characterized in that, The liquid medium in the second liquid storage chamber is directly discharged from the first water outlet according to the user's selection; the passage between the first liquid storage chamber and the second liquid storage chamber is disconnected by the first electromagnetic valve assembly; the first water pumping assembly is started, the second electromagnetic valve assembly is started and adjusted to select the first water outlet section for water outlet.

11. The temperature control method for the liquid heating device according to claim 6, characterized in that, The second liquid storage chamber is replenished with the liquid medium in the water tank according to the user's selection; The second electromagnetic valve assembly is controlled to disconnect the communication between the drinking water passage and the first water outlet section, and between the drinking water passage and the second water outlet section; The first electromagnetic valve assembly is controlled to communicate the water replenishing passage with the circulating water passage, and simultaneously disconnect the circulating water passage flowing through the heat exchange assembly; The second water pumping assembly is started to pump the liquid medium in the water tank into the second liquid storage chamber.

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