Water drinking device

Abstract

The embodiment of the utility model discloses a water drinking device. The water drinking device comprises an instant heating pipeline, a cold water pipeline and a backflow pipeline. The cold water pipeline comprises a cold tank; the backflow pipeline is communicated with the instant heating pipeline and the cold tank and used for enabling hot water in the instant heating pipeline to flow back into the cold tank when the cold tank is sterilized so as to sterilize the cold water pipeline, and therefore the probability that bacteria breed in the cold water pipeline can be reduced, and reliable guarantee is provided for drinking water health of a user.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and more specifically, to a drinking water device. Background Technology

[0002] In related technical fields, drinking water devices often use a cold tank to cool room temperature water. When a user takes cold water, the cold tank delivers cold water to the cold water outlet, allowing the user to take cold water. However, since the cold water is stored in the cold tank, impurities in the water will also accumulate in the cold tank. Over time, this becomes a breeding ground for bacteria, which can easily affect the user's health. Utility Model Content

[0003] This application provides a drinking water device designed to return hot water from an instant heating pipeline to a cold tank for sterilization of the cold water pipeline, thereby reducing the probability of bacterial growth in the cold water pipeline and providing reliable protection for the user's drinking water health.

[0004] This application provides a drinking water device, including an instant hot water pipeline, a cold water pipeline, and a return pipeline; the cold water pipeline includes a cold tank; the return pipeline is connected to both the instant hot water pipeline and the cold tank, and is used to return the hot water from the instant hot water pipeline to the cold tank to sterilize the cold water pipeline when sterilizing the cold tank.

[0005] In some embodiments, the return pipeline includes a return water pipe, which is connected to both the instant heating pipeline and the cold tank; a first control valve is located on the return water pipe; wherein, when the cold tank is sterilized, the first control valve is opened, and the hot water from the instant heating pipeline enters the cold tank through the return water pipe.

[0006] In some embodiments, the instant heating pipeline further includes an instant heating pipe, an instant hot water outlet pipe, and a second control valve. The inlet of the instant heating pipe is used to connect to room temperature water, and the outlet of the instant heating pipe is connected to the return water pipe. The instant hot water outlet pipe is connected to the outlet of the instant heating pipe. The second control valve is located on the instant hot water outlet pipe. When sterilizing the cold tank, the first control valve is opened and the second control valve is closed.

[0007] In some embodiments, the first control valve and the second control valve are a three-way control valve as a whole, or the first control valve and the second control valve are different control valves.

[0008] In some embodiments, the instant heating pipeline further includes a first water temperature detection element, which is disposed at the outlet of the instant heating pipeline and is used to detect the water temperature at the outlet of the instant heating pipeline.

[0009] In some embodiments, the instant heating pipeline further includes an instant heating inlet pipe, an instant heating inlet valve, and a hot water pump. The instant heating inlet pipe is connected to the inlet of the instant heating pipe. The instant heating inlet valve is located on the instant heating inlet pipe. The hot water pump is located on the instant heating inlet pipe and is located on the side of the instant heating inlet valve near the instant heating pipe.

[0010] In some embodiments, the instantaneous heating pipeline also includes a pressure reducing valve, which is located in the instantaneous water inlet pipe and between the instantaneous water inlet valve and the hot water pump.

[0011] In some embodiments, the cold water pipeline also includes a cold tank inlet pipe and a cold tank inlet valve. The cold tank inlet pipe is connected to the inlet of the cold tank and to the return pipeline. The cold tank inlet valve is located on the cold tank inlet pipe. The return pipeline is connected to the side of the cold tank inlet valve near the cold tank. When the cold water pipeline is sterilized, the return pipeline is opened and the cold tank inlet valve is closed, so that hot water from the hot water pipeline enters the cold tank through the return pipeline and the cold tank inlet pipe.

[0012] In some embodiments, the cold water pipeline further includes a cold tank outlet pipe, a cold water pump, and a cold tank outlet valve. The cold tank outlet pipe is connected to the outlet of the cold tank. The cold water pump is located on the cold tank outlet pipe. The cold tank outlet valve is located on the cold tank outlet pipe and is located on the side of the cold water pump away from the cold tank.

[0013] In some embodiments, the cold water pipeline further includes a second water temperature sensor, which is disposed inside the cold tank and is used to detect the water temperature inside the cold tank.

[0014] In some embodiments, the cold water pipeline further includes a water level detection device disposed in the cold tank for detecting the water level in the cold tank; wherein the water level detection device includes at least one of a water level probe, a water level float, and a Hall element.

[0015] In some embodiments, the drinking water device further includes a main water inlet pipe and a first flow meter. The main water inlet pipe is connected to the instant hot water pipe and the cold water pipe and is used to supply water to the instant hot water pipe and the cold water pipe. The first flow meter is installed on the main water inlet pipe.

[0016] In some embodiments, the cold water pipeline also includes a cold tank outlet pipe and a second flow meter. The cold tank outlet pipe is connected to the outlet of the cold tank. The second flow meter is installed on the cold tank outlet pipe and is used in conjunction with the first flow meter to detect the water level in the cold tank.

[0017] In some embodiments, the cold water line also includes an exhaust pipe connected to the cold tank for connecting the cold tank to the atmosphere.

[0018] In some embodiments, the cold water pipeline also includes an air vent valve, which is disposed on the air vent pipe and is used to control the opening and closing of the air vent pipe.

[0019] Based on the water drinking device of this application, when sterilizing the cold tank, the hot water from the instant heating pipeline can be returned to the cold tank to sterilize the cold water pipeline, thereby reducing the probability of bacteria growing in the cold water pipeline and providing reliable protection for the user's drinking water health.

[0020] Furthermore, since this application uses an instant heating pipeline, room temperature water can be heated into hot water as it flows through the instant heating pipeline. Compared with the solution of using a hot tank to heat room temperature water, the instant heating pipeline has higher heating efficiency. Therefore, when sterilizing cold water pipelines, the time it takes for room temperature water to be heated into hot water can be reduced, thereby improving the sterilization efficiency of cold water pipelines. Attached Figure Description

[0021] 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 these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a drinking water device in one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the water circuit structure of a drinking water device in one embodiment of this application;

[0024] Figure 3 This is a flowchart of a control method for a drinking water device in one embodiment of this application;

[0025] Figure 4 This is a flowchart of a control method for a drinking water device in another embodiment of this application;

[0026] Figure 5 This is a flowchart of a control method for a drinking water device in another embodiment of this application;

[0027] Figure 6 This is a flowchart of a control method for a drinking water device in another embodiment of this application;

[0028] Figure 7 This is a flowchart of a control method for a drinking water device in another embodiment of this application;

[0029] Figure 8 This is a flowchart of a control method for a drinking water device in another embodiment of this application;

[0030] Figure 9 This is a flowchart of a control method for a drinking water device in another embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Drinking water device; 11. Outer casing; 12. Instantaneous heating pipe; 120. Instantaneous heating pipe; 121. Instantaneous hot water outlet pipe; 122. Second control valve; 123. First water temperature sensor; 124. Instantaneous hot water inlet pipe; 125. Instantaneous hot water inlet valve; 126. Hot water pump; 127. Pressure reducing valve; 13. Cold water pipe; 130. Cold tank; 131. Cold tank inlet pipe; 132. Cold tank inlet valve ; 133. Cold tank outlet pipe; 134. Cold water pump; 135. Cold tank outlet valve; 136. Second water temperature sensor; 137. Water level sensor; 138. Vent pipe; 14. Return pipeline; 140. Return water pipe; 141. First control valve; 15. Three-way control valve; 16. Main inlet pipe; 160. First flow meter; 17. Normal temperature water pipeline; 171. Normal temperature water valve; 18. Check valve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] Please refer to Figure 1 and Figure 2 This application provides a drinking water device 1, including a housing 11, a filtration system (not shown in the figure), an instant heating pipe 12, a cold water pipe 13, and a room temperature water pipe 17.

[0034] The filtration system, instant heating pipe 12, cold water pipe 13, and ambient temperature water pipe 17 are all housed within the outer casing 11. The outer casing 11 protects these components, reducing the probability of damage and thus extending the service life of the drinking water device 1. It is understood that the outer casing 11 can be made of metal or plastic. In other embodiments, the outer casing 11 can also be made of other materials. In this embodiment, the material of the outer casing is not limited. It is understood that the shape of the outer casing 11 can be a cube, cylinder, or sphere. In other embodiments, the outer casing 11 can also be other shapes. In this embodiment, the shape of the outer casing 11 is not limited.

[0035] The filtration system is connected to the tap water pipe and includes a filter element, a booster pump, and an inlet solenoid valve. The booster pump and solenoid valve are electrically connected to the controller. When the controller detects a signal for room temperature water, a signal for hot water, or a signal for water replenishment from the cold water pipe 13, it controls the filtration system to start water production. When the signal disappears, the controller controls the filtration system to stop water production and enter standby mode. The room temperature water from the filtration system's outlet can enter the instant hot water pipe 12, the cold water pipe 13, and the room temperature water pipe 17, allowing users to obtain hot water from the hot water outlet, cold water from the cold water outlet, and room temperature water from the room temperature water outlet.

[0036] For example, a filtration system may include multiple filter elements, which may be set up independently or integrated into a composite filter element.

[0037] For example, the filtration system may include an inlet valve, a first filter element, a second filter element, a booster pump, and a check valve. The inlet end of the inlet valve is connected to the raw water inlet, the outlet end of the inlet valve is connected to the inlet end of the first filter element, the outlet end of the first filter element is connected to the inlet end of the booster pump, the outlet end of the booster pump is connected to the inlet end of the second filter element, the outlet end of the second filter element is connected to the inlet end of the check valve, and the outlet end of the check valve is connected to the outlet end of the filtration system.

[0038] The first filter element is used for preliminary filtration of raw water, which can filter out large particles such as mud, rust, insect eggs, and red worms. The raw water can be tap water, well water, etc. The first filter element can be a PP cotton filter element (polypropylene melt-blown filter element), carbon rod filter element, composite filter element, etc.

[0039] The second filter element contains a reverse osmosis membrane, which can be an artificial semi-permeable membrane. The membrane pore size of the reverse osmosis membrane is very small, which can effectively remove impurities such as dissolved salts, colloids, microorganisms, and organic matter from the water.

[0040] A wastewater pipe is connected to the second filter element, and a wastewater valve is installed on the wastewater pipe to control the discharge of wastewater.

[0041] In other embodiments, the filtration system may further include a third filter element, the inlet of which is connected to the outlet of the second filter element, and the outlet of the third filter element is connected to the outlet of the filtration system.

[0042] The third filter element is used to adsorb odors and residual chlorine, and can be used to improve the taste of room temperature water. The third filter element can be an activated carbon filter element.

[0043] The inlet of the instant heating pipe 12 is connected to the outlet of the filtration system, and the outlet of the instant heating pipe 12 is connected to the hot water outlet. When the user takes hot water, the filtration system starts to produce water, or water stored in the pure water tank enters the instant heating pipe 12. The instant heating pipe 12 heats the room temperature water and delivers it to the hot water outlet, so that the user can take hot water.

[0044] The inlet of the cold water pipe 13 is connected to the outlet of the filtration system, and the outlet of the cold water pipe 13 is connected to the cold water outlet. Room temperature water can be cooled through the cold water pipe 13 and delivered to the cold water outlet when the user takes cold water, so that the user can take cold water.

[0045] The inlet of the ambient temperature water pipe 17 is connected to the outlet of the filtration system, and the outlet of the ambient temperature water pipe 17 is connected to the ambient temperature water outlet. Ambient temperature water filtered by the filtration system can enter the ambient temperature water pipe 17. It is understood that an ambient temperature water valve 171 is installed on the ambient temperature water pipe 17. When a user needs ambient temperature water, the valve 171 opens, the ambient temperature water pipe 17 is open, and the user can then access ambient temperature water at the outlet.

[0046] Please refer to Figure 1 and Figure 2 In related technologies, the cold water pipeline 13 often includes a cold tank 130. Room temperature water enters the cold tank 130 for cooling, and when the user takes cold water, the cold tank 130 delivers cold water to the cold water outlet, so that the user can take cold water from the cold water outlet. However, since the cold water is stored in the cold tank 130, impurities in the water will also accumulate in the cold tank 130. Over time, it becomes a breeding ground for bacteria, which can easily affect the user's health.

[0047] Please refer to Figure 1 and Figure 2 In one embodiment, the drinking water device 1 further includes a return pipe 14, which is connected to both the instant heating pipe 12 and the cold tank 130. When sterilizing the cold tank 130, the hot water from the instant heating pipe 12 can be returned to the cold tank 130 to sterilize the cold water pipe 13, thereby reducing the probability of bacteria growing in the cold water pipe 13 and providing reliable protection for the user's drinking water health.

[0048] Furthermore, since this application uses an instant heating pipe 12, room temperature water can be heated into hot water as it flows through the instant heating pipe 12. Compared with the solution of using a hot tank to heat room temperature water, the instant heating pipe 12 can have higher heating efficiency. Therefore, when sterilizing the cold water pipe 13, the time for room temperature water to be heated into hot water can be reduced, thereby improving the sterilization efficiency of sterilizing the cold water pipe 13.

[0049] Please refer to Figure 1 and Figure 2In one embodiment, the return pipeline 14 includes a return water pipe 140 and a first control valve 141. The return water pipe 140 is connected to both the instant heating pipeline 12 and the cold tank 130. The first control valve 141 is disposed on the return water pipe 140.

[0050] When it is necessary to sterilize the cold tank 130, the controller can control the first control valve 141 to open, so that the instant heating pipe 12 and the cold tank 130 are connected through the return pipe 14. The hot water from the instant heating pipe 12 enters the cold tank 130 through the return water pipe 140, and the hot water can be used to sterilize the cold tank 130.

[0051] Please refer to Figure 1 and Figure 2 Furthermore, in order to improve the sterilization efficiency of the cold tank 130, the instant heating pipeline 12 also includes an instant heating pipe 120, an instant hot water outlet pipe 121, and a second control valve 122. The inlet of the instant heating pipe 120 is used to connect to room temperature water, and the outlet of the instant heating pipe 120 is connected to the return water pipe 140; the instant hot water outlet pipe 121 is connected to the outlet of the instant heating pipe 120; and the second control valve 122 is installed on the instant hot water outlet pipe 121.

[0052] When sterilization of the cold tank 130 is required, the second control valve 122 can be closed first, and the first control valve 141 can be opened. Then, room temperature water is controlled to flow through the instant heating pipe 120 and heated into hot water. The hot water enters the cold tank 130 through the return water pipe 140, thereby sterilizing the cold tank 130. Furthermore, since the second control valve 122 is closed, the instant hot water outlet pipe 121 is also closed, allowing all the hot water to flow into the cold tank 130. This increases the water volume in the cold tank 130 and the contact area between the water and the inner wall of the cold tank 130, thereby improving the sterilization efficiency of the hot water in the cold tank 130.

[0053] Furthermore, since the instant heating pipe 120 is used to heat room temperature water in real time, the room temperature water can be heated into hot water as it flows through the instant heating pipe 12. Compared with the solution of using a hot tank to heat room temperature water, the instant heating pipe 12 can have higher heating efficiency. Therefore, when sterilizing the cold water pipe 13, the time it takes for room temperature water to be heated into hot water can be reduced, thereby improving the sterilization efficiency of the cold water pipe 13.

[0054] Please refer to Figure 1 and Figure 2 In another embodiment, the first control valve 141 and the second control valve 122 can be integrated into a three-way control valve 15.

[0055] Please refer to Figure 1 and Figure 2Specifically, the first port of the three-way control valve 15 is connected to the outlet of the instant heating pipe 120, the second port of the three-way control valve 15 is connected to the return water pipe 140, and the third port of the three-way control valve 15 is connected to the instant hot water outlet pipe 121. The three-way control valve 15 can connect the first port and the second port, or connect the first port and the third port. When the user receives hot water from the hot water outlet, the first port and the third port of the three-way control valve 15 are connected, so that room temperature water can be heated into hot water through the instant heating pipe 120, and the hot water can flow out through the instant hot water outlet pipe 121 and the hot water outlet. When hot water sterilization is required for the cold tank 130, the three-way valve can switch the connection state, so that the first port and the second port are connected, and the first port and the second port are closed.

[0056] Please refer to Figure 1 and Figure 2 In one embodiment, the instant heating pipe 12 further includes a first water temperature detection element 123, which is disposed at the outlet of the instant heating pipe 120. The first water temperature detection element 123 is used to detect the water temperature at the outlet of the instant heating pipe 120, so that the instant heating pipe 120 can adjust the hot water temperature of the instant heating pipe 120 according to the user's hot water demand and the sterilization demand of the cold tank 130, thereby meeting the user's hot water temperature demand and the sterilization water temperature demand of the cold tank 130.

[0057] Please refer to Figure 1 and Figure 2 It is understandable that a water temperature sensor can be installed at the inlet of the instant heating pipe 120. This sensor detects the water temperature at the inlet of the instant heating pipe 120, allowing the heating power of the instant heating pipe 120 to be adjusted accordingly. For example, in winter, when the ambient water temperature is low, the sensor detects a low water temperature at the inlet of the instant heating pipe 120. In this case, given the same length of the instant heating pipe 120, the power of the instant heating pipe 120 can be increased to ensure that within the same timeframe, the heating element can heat the ambient water to a temperature that meets the user's hot water consumption requirements and the sterilization requirements of the cold tank 130. This improves the heating efficiency of the instant heating pipe 120 and reduces the user's waiting time. Furthermore, during the sterilization process in the cold tank 130, the hot water production time can be shortened to improve the sterilization efficiency of using hot water to sterilize the cold tank 130.

[0058] Please refer to Figure 1 and Figure 2In one embodiment, the instant heating pipeline 12 further includes an instant heating inlet pipe 124, an instant heating inlet valve 125, and a hot water pump 126. The inlet of the instant heating inlet pipe 124 is connected to the outlet of the filtration system, and the outlet of the instant heating inlet pipe 124 is connected to the inlet of the instant heating pipe 120. The instant heating inlet valve 125 is disposed on the instant heating inlet pipe 124. The hot water pump 126 is disposed on the instant heating inlet pipe 124 and is disposed on the side of the instant heating inlet valve 125 near the instant heating pipe 120.

[0059] When room temperature water needs to be heated, the controller controls the instant hot water inlet valve 125 to open and controls the hot water pump 126 and the instant hot water pipe 120 to work. The hot water pump 126 drives room temperature water to move from the instant hot water inlet pipe 124 to the instant hot water pipe 120 until the room temperature water enters the instant hot water pipe 120 and is heated into hot water by the heating pipe.

[0060] Please refer to Figure 1 and Figure 2 In one embodiment, the instant heating pipe 12 further includes a pressure reducing valve 127, which is disposed in the instant heating inlet pipe 124 and between the instant heating inlet valve 125 and the hot water pump 126. The pressure reducing valve 127 can reduce the pressure of the room-temperature water in the instant heating inlet pipe 124, thereby reducing the flow rate of the room-temperature water in the instant heating inlet pipe 124. This results in a slower flow rate of water in the instant heating pipe 120, allowing the instant heating pipe 120 to heat the water flowing through it into hot water, thus improving the accuracy of water temperature control by the instant heating pipe 120.

[0061] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes an instant heating pipeline 131 and a cold tank inlet valve 132. The instant heating pipeline 131 is connected to the inlet of the cold tank 130 and to the return pipeline 14. The cold tank inlet valve 132 is disposed on the instant heating pipeline 131. The return pipeline 14 is connected to the side of the cold tank inlet valve 132 near the cold tank 130.

[0062] When sterilizing the cold water pipe 13, the return pipe 14 is opened and the cold tank inlet valve 132 is closed. The hot water from the instant heating pipe 12 enters the cold tank 130 through the return pipe 14 and the instant heating pipe 131, so as to use hot water to sterilize the instant heating pipe 131 and the cold tank 130.

[0063] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes a cold tank outlet pipe 133, a cold water pump 134, and a cold tank outlet valve 135. The cold tank outlet pipe 133 is connected to the outlet of the cold tank 130 and is also connected to the cold water outlet. The cold water pump 134 is disposed on the cold tank outlet pipe 133. The cold tank outlet valve 135 is disposed on the cold tank outlet pipe 133 and is disposed on the side of the cold water pump 134 away from the cold tank 130.

[0064] When a user needs to take cold water, the cold water outlet valve is opened and the cold water pump 134 is operated to pump the cold water in the cold tank 130 through the outlet of the cold tank 130 and out of the cold water outlet, so that the user can take cold water from the cold water outlet.

[0065] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes a second water temperature detection element 136, which is disposed inside the cold tank 130 and is used to detect the water temperature inside the cold tank 130, thereby keeping the water temperature inside the cold tank 130 at the cold water temperature so that the user can take out cold water.

[0066] Furthermore, since the second water temperature sensor 136 is installed inside the cold tank 130, when hot water is used to sterilize the cold tank 130, the water temperature inside the cold tank 130 can be detected by the second water temperature sensor 136. This ensures that the hot water inside the cold tank 130 can sterilize the cold tank 130, thereby improving the sterilization effect of the cold tank 130 and improving the quality of hot water sterilization, thus providing reliable protection for the health of users.

[0067] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes a water level detection element 137, which is disposed in the cold tank 130 and is used to detect the water level in the cold tank 130. When the water level in the cold tank 130 is low, the cold tank inlet valve 132 is opened so that room temperature water can enter the cold tank 130 through the instant heating pipeline 131, thereby replenishing the cold tank 130 with water. This ensures that there is enough cold water in the cold tank 130 for the user to use when taking cold water, thus improving the user's experience of taking cold water.

[0068] It is understood that the water level detection element 137 includes at least one of a water level probe, a water level float, and a Hall element. In other embodiments, the water level detection element 137 may also take other forms. In the embodiments of this application, the specific form of the water level detection element 137 is not limited.

[0069] Please refer to Figure 1 and Figure 2 In one embodiment, the drinking water device 1 further includes a main water inlet pipe 16 and a first flow meter 160. The main water inlet pipe 16 is connected to the instant hot water inlet pipe 124 and the instant hot water pipeline 131, and is used to supply water to the instant hot water pipeline 12 and the cold water pipeline 13. The first flow meter 160 is disposed on the main water inlet pipe 16 and is used to detect the flow rate of the main water inlet pipe 16.

[0070] Please refer to Figure 1 and Figure 2In one embodiment, the cold water pipeline 13 further includes a second flow meter, which is disposed on the cold tank outlet pipe 133 and is used to cooperate with the first flow meter 160 to detect the water level in the cold tank 130.

[0071] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes an exhaust pipe 138, which is connected to the cold tank 130. The exhaust pipe 138 connects the cold tank 130 to the atmosphere, thereby balancing the internal and external air pressure of the cold tank 130, facilitating the entry of room temperature water into the cold tank 130 for water replenishment, and also facilitating the entry of hot water into the cold tank 130 for sterilization. It also facilitates the outflow of cold water from the cold tank 130, allowing for emptying the cold tank 130 or for use by the user.

[0072] Please refer to Figure 1 and Figure 2 Furthermore, the cold water pipe 13 also includes an air vent valve, which is located on the air vent pipe 138 and is used to control the opening and closing of the air vent pipe 138.

[0073] Please refer to Figure 1 and Figure 2 For example, when the cold tank 130 needs to be replenished with water or sterilized with hot water, after room temperature water or hot water enters the cold tank 130, the exhaust valve can be closed to reduce the loss of cold air through the exhaust pipe 138 during the refrigeration process, thereby improving the refrigeration efficiency of the cold tank 130, or to reduce the loss of hot air through the exhaust pipe 138, thereby improving the sterilization effect of hot water on the cold tank 130.

[0074] Please refer to Figure 1 and Figure 2 In one embodiment, the cold water pipeline 13 further includes a drain pipe, which is connected to the drain outlet of the cold tank 130. The drain pipe can be used to drain the water in the cold tank 130 to facilitate cleaning of the cold tank 130. It is understood that a drain valve is also provided on the drain pipe. By controlling the opening and closing of the drain valve, the opening and closing of the drain pipe can be controlled, thereby controlling the drainage status of the cold tank 130.

[0075] Please refer to Figure 1 and Figure 2 In this embodiment of the application, in order to optimize the pipeline design, the ambient temperature water outlet and the cold water outlet are combined. In order to prevent ambient temperature water and cold water from flowing together, a one-way valve 18 is also provided on the cold water outlet pipe 133 so that the one-way valve 18 can remain closed when cold water is not being used, so as to prevent ambient temperature water from entering the cold water outlet pipe, thereby improving the user's experience of using cold water.

[0076] Please refer to Figure 1 , Figure 2 and Figure 3 This application also provides a control method for a drinking water device 1, the control method including:

[0077] Step S100: When the first sterilization condition is met, obtain the water level in the cold tank 130.

[0078] In this embodiment, when the first sterilization condition is met, the controller can obtain the water level inside the cold tank 130 through the water level detection element 137. In other embodiments, the water level inside the cold tank 130 can also be obtained through the first flow meter 160 and the second flow meter. In this embodiment, there are no specific limitations on the method of detecting the water level inside the cold tank 130.

[0079] It is understood that the first sterilization condition includes the water drinking device 1 continuously operating for a preset running time, or the water drinking device 1 receiving a sterilization signal. Specifically, the preset running time can be 10 hours, 24 hours, 36 hours, 72 hours, etc., and in this embodiment, no specific limitation is made on the preset running time. Specifically, the sterilization signal received by the water drinking device 1 can be issued by a mobile device, or it can be issued by a triggering device set on the water drinking device 1. For example, the triggering device can be a button set on the water drinking device 1. The mobile device can be a mobile phone, watch, tablet, or laptop computer that can communicate with the water drinking device 1, wherein the communication method includes at least one of NFC (Near Field Communication), Bluetooth, and WIFI (Wireless Fidelity).

[0080] Step S200: When the water level in the cold tank 130 is not higher than the first preset water level, control the instant heating pipeline 12 to work and control the return pipeline 14 to return the hot water in the instant heating pipeline 12 to the cold tank 130 to sterilize the cold water pipeline 13.

[0081] In this embodiment, when the water level in the cold tank 130 is not higher than the first preset water level, the controller can control the return water pipe 140 to connect with the outlet of the heat collection pipe, control the instant hot water inlet pipe 124 to open, and control the instant hot water pipe 120 to work, so that when room temperature water flows through the instant hot water pipe 120, the instant hot water pipe 120 can heat the room temperature water into hot water. The hot water enters the cold tank 130 through the return water pipe 140 to sterilize the cold tank 130 with hot water, thereby reducing the probability of bacteria growing in the cold water pipe 13, and providing reliable protection for the user's drinking water health.

[0082] Furthermore, since this application uses an instant heating pipe 12, room temperature water can be heated into hot water as soon as it flows through the instant heating pipe 12. Compared with the solution of using a hot water tank to heat room temperature water, the instant heating pipe 12 can have a higher heating efficiency. Therefore, when sterilizing the cold water pipe 13, the time it takes for room temperature water to be heated into hot water can be reduced, thereby improving the sterilization efficiency of the cold water pipe 13.

[0083] Please refer to Figure 1 , Figure 2 and Figure 4 In one embodiment, step S200 includes:

[0084] Step S210: When the water level in the cold tank 130 is not higher than the first preset water level, control the instant hot water outlet pipe 121 to close and control the return water pipe 140 to open.

[0085] In this embodiment of the application, when the water level in the cold tank 130 is not higher than the first preset water level, the controller can control the instant hot water outlet pipe 121 to close and control the return water pipe 140 to open, so that the cold tank 130 can be connected to the outlet of the instant hot water pipe 120 through the return water pipe 140.

[0086] Step S220: Control the instant hot water inlet pipe 124 to open and control the instant hot water pipe 120 to work so that hot water with the first preset water temperature can enter the cold tank 130 through the return water pipe 140 to sterilize the cold tank 130.

[0087] In this embodiment, after the cold tank 130 is connected to the outlet of the instant heating pipe 120 through the return water pipe 140, the controller controls the instant water inlet valve 125 to open the instant water inlet pipe 124, and controls the hot water pump 126, the pressure reducing valve 127 and the instant heating pipe 120 to work, so that the instant heating pipe 120 can heat the room temperature water to hot water with a first preset water temperature. The hot water with the first preset water temperature can enter the cold tank 130 through the return water pipe 140, thereby sterilizing the cold tank 130.

[0088] Please refer to Figure 1 , Figure 2 and Figure 5 In one embodiment, step S210 includes:

[0089] Step S211: When the water level in the cold tank 130 is not higher than the first preset water level, control the three-way control valve 15 to connect the outlet of the instant heating pipe 120 with the return water pipe 140.

[0090] In this embodiment, when the water level in the cold tank 130 is not higher than the first preset water level, the controller controls the three-way control valve 15 to connect the outlet of the instant heating pipe 120 with the return water pipe 140. At this time, the outlet of the instant heating pipe 120 is not connected to the instant hot water outlet pipe 121, so as to ensure that all the hot water can enter the cold tank 130, thereby improving the sterilization efficiency of the cold tank 130.

[0091] Please refer to Figure 1 , Figure 2 and Figure 6 In one embodiment, after step S220, the method further includes:

[0092] Step S230: When the water level in the cold tank 130 is not lower than the second preset water level, control the instant hot water inlet pipe 124 to close, control the instant hot water pipe 120 to stop heating, and control the return water pipe 140 to close; wherein, the second preset water level is higher than the first preset water level.

[0093] In this embodiment, when the water level in the cold tank 130 is not lower than the second preset water level, the controller controls the instant hot water inlet valve 125 to close, thereby closing the instant hot water inlet pipe 124, and controlling the instant hot water pipe 120 to stop heating. It also controls the first control valve 141 to close, thereby closing the return water pipe 140. This allows hot water with the first preset water temperature to remain in the cold tank 130 for sterilization. Furthermore, since the return water pipe 140 is closed, the probability of steam generated by the hot water in the cold tank 130 escaping through the return water pipe 140 is reduced, thus slowing down the temperature drop of the hot water in the cold tank 130 and improving the sterilization effect of the hot water on the cold tank 130. In other embodiments, the three-way control valve 15 can also be controlled to connect the outlet of the instant hot water pipe 120 to the instant hot water outlet pipe 121. In this case, the return water pipe 140 is also closed.

[0094] Please refer to Figure 1 , Figure 2 and Figure 7 In one embodiment, after step S230, the method further includes:

[0095] Step S240: When the second sterilization condition is met, the cold tank outlet pipe 133 is opened, and the hot water in the cold tank 130 is discharged through the cold tank outlet pipe 133 to sterilize the cold tank outlet pipe 133; wherein, the second sterilization condition includes the water temperature of the hot water in the cold tank 130 being reduced to a second preset water temperature, the second preset water temperature being lower than the first preset water temperature, and / or, the water level in the cold tank 130 being maintained at the second preset water level for a preset sterilization time.

[0096] In this embodiment of the application, when the second sterilization condition is met, the controller controls the cold tank outlet valve 135 to open, so that the cold tank outlet pipe 133 is opened, and the hot water from the cold tank 130 can be discharged through the cold tank outlet pipe 133. This allows the hot water to be used to sterilize the cold tank outlet pipe 133, thereby reducing the probability of bacteria growing in the cold tank outlet pipe 133 and providing a reliable guarantee for the user's drinking water health.

[0097] It is understood that the second sterilization condition can be that the water temperature in the cold tank 130 is reduced to a second preset water temperature, which is lower than the first preset water temperature. In other embodiments, the second sterilization condition can also be that the water level in the cold tank 130 remains at the second preset water level for a preset sterilization time. For example, the first preset water temperature can be 100°, 99°, 98°, 97°, 96°, etc. In other embodiments, the first preset water temperature can also be other temperatures. In this application embodiment, the specific temperature value of the first preset water temperature is not limited. For example, the second preset water temperature can be 65°, 70°, 75°, 80°, etc. In other embodiments, the second preset water temperature can also be other temperatures. In this application embodiment, the specific temperature value of the second preset water temperature is not limited.

[0098] The preset sterilization time can be 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 40 minutes, etc. In other embodiments, the preset sterilization time can also be other durations. In the embodiments of this application, no specific limitation is made on the preset sterilization time.

[0099] Please refer to Figure 1 , Figure 2 and Figure 8 In one embodiment, prior to step S200, the method further includes:

[0100] Step S300: When the water level in the cold tank 130 is higher than the first preset water level, control the cold tank outlet pipe 133 to open so that the water in the cold tank 130 can be discharged through the cold tank outlet pipe 133.

[0101] In this embodiment of the application, when the controller detects through the water level detection device 137 that the water level in the cold tank 130 is higher than the first preset water level, the controller can control the cold tank outlet valve 135 to open, so that the cold tank outlet pipe 133 can be opened, so that the water in the cold tank 130 can be discharged through the cold tank outlet pipe 133, thereby adjusting the water level in the cold tank 130.

[0102] Please refer to Figure 1 , Figure 2 and Figure 9 In one embodiment, prior to step S200, the method further includes:

[0103] Step S400: When the water level in the cold tank 130 is higher than the first preset water level, control the drain pipe to open so that the water in the cold tank 130 can be discharged through the drain pipe.

[0104] In this embodiment of the application, when the controller detects through the water level detection device 137 that the water level in the cold tank 130 is higher than the first preset water level, the controller can control the drain valve to open so that the drain pipe can be opened so that the water in the cold tank 130 can be discharged through the drain pipe, thereby adjusting the water level in the cold tank 130.

[0105] It is understood that the first preset water level can be the lowest water level that the water level detection device 137 in the cold tank 130 can measure, or it can be the water level after the cold tank 130 is emptied. In other embodiments, the first preset water level can also be higher than the lowest water level that the water level detection device 137 can measure. In this case, the heating power of the instant heating pipe 120 can be adjusted according to the specific water level in the cold tank 130 to adjust the water temperature at the outlet of the instant heating pipe 120. This ensures that the water temperature after the hot water heated by the instant heating pipe 120 enters the cold tank 130 and mixes with the residual water in the cold tank 130 is still higher than the second preset water temperature. This can improve the sterilization effect of the hot water on the cold tank 130 and reduce the probability of bacterial growth in the cold tank 130.

[0106] It is understandable that, in order to adapt to different sterilization requirements, the above control method can be cycled multiple times until the corresponding requirements are met. The number of cycles can be 3, 4, 5, 6, etc., but in the embodiments of this application, no specific limit is placed on the number of cycles.

[0107] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 this application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0108] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0109] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "communication," "fixation," etc., should be interpreted broadly. For example, they can refer to fixed communication, detachable communication, or integral communication; they can refer to mechanical communication or electrical communication; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0110] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0111] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A drinking water device, characterized in that The application relates to a water heating system. The water heating system comprises: a heating pipeline; a cold water pipeline comprising a cold tank; and 2. The drinking water device of claim 1, wherein a backflow pipeline in communication with the heating pipeline and the cold tank, and used for backflowing hot water in the heating pipeline into the cold tank to sterilize the cold water pipeline when the cold tank is sterilized. The backflow pipeline comprises: a backflow water pipe in communication with the heating pipeline and the cold tank; and a first control valve arranged in the backflow water pipe; 3. The drinking water device of claim 2, wherein wherein when the cold tank is sterilized, the first control valve is opened, and the hot water in the heating pipeline enters the cold tank through the backflow water pipe. The heating pipeline further comprises: a heating pipe with a water inlet for connecting to normal-temperature water and a water outlet in communication with the backflow water pipe; a heating water outlet pipe connected to the water outlet of the heating pipe; and 4. The drinking water device of claim 3, wherein a second control valve arranged in the heating water outlet pipe, and when the cold tank is sterilized, the first control valve is opened, and the second control valve is closed.

5. The water dispensing device of claim 3, wherein The first control valve and the second control valve are integrated into a three-way control valve, or the first control valve and the second control valve are different control valves. The heating pipeline further comprises:

6. The drinking water device of claim 3, wherein a first water temperature detecting element arranged at the water outlet of the heating pipe, and used for detecting the water temperature of the water outlet of the heating pipe. The heating pipeline further comprises: a heating water inlet pipe in communication with the water inlet of the heating pipe; a heating water inlet valve arranged in the heating water inlet pipe; and 7. The drinking water device of claim 6, wherein a hot water pump arranged in the heating water inlet pipe and arranged on the side of the heating water inlet valve close to the heating pipe. The heating pipeline further comprises:

8. The drinking water device of claim 1, wherein a pressure reducing valve arranged in the heating water inlet pipe and arranged between the heating water inlet valve and the hot water pump. The cold water pipeline further comprises: a cold tank water inlet pipe in communication with a water inlet of the cold tank and in communication with the backflow pipeline; and a cold tank water inlet valve arranged in the cold tank water inlet pipe, and the backflow pipeline is in communication with the side of the cold tank water inlet valve close to the cold tank; 9. The drinking water device of claim 1, wherein, wherein when the cold water pipeline is sterilized, the backflow pipeline is opened, the cold tank water inlet valve is closed, and the hot water in the heating pipeline enters the cold tank through the backflow pipeline and the cold tank water inlet pipe. The cold water pipeline further comprises: a cold tank water outlet pipe in communication with a water outlet of the cold tank; a cold water pump arranged in the cold tank water outlet pipe; and 10. The drinking water device of claim 1, wherein a cold tank water outlet valve arranged in the cold tank water outlet pipe and arranged on the side of the cold water pump away from the cold tank. The cold water pipeline further comprises:

11. The drinking water device of claim 1, wherein a second water temperature detecting element arranged in the cold tank, and used for detecting the water temperature of water in the cold tank. The cold water pipeline further comprises: a water level detecting element arranged in the cold tank, and used for detecting the water level of water in the cold tank; 12. The drinking water device of claim 1, wherein wherein the water level detecting element comprises at least one of a water level probe, a water level float ball and a Hall element. The application further relates to a water heating system. The water heating system comprises: a main water inlet pipe in communication with the heating pipeline and the cold water pipeline, and used for supplying water to the heating pipeline and the cold water pipeline; and 13. The drinking water device of claim 12, wherein a first flow meter arranged in the main water inlet pipe. The cold water pipeline further comprises: a cold tank water outlet pipe in communication with a water outlet of the cold tank; and A second flow meter is arranged in the cold tank water outlet pipe and cooperates with the first flow meter to detect the water level in the cold tank.

14. The drinking water device according to any one of claims 1 to 13, characterized in that The cold water pipeline further comprises: An exhaust pipe is in communication with the cold tank and is used to communicate the cold tank with the atmosphere.

15. The drinking water device of claim 14, wherein, The cold water pipeline further comprises: An exhaust valve is arranged in the exhaust pipe and is used to control the opening and closing of the exhaust pipe.

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