Water drinking equipment

Abstract

The utility model provides drinking water equipment which comprises a heating container, a water purification unit, a water inlet pipe communicated with the water purification unit and the heating container, a water outlet pipe communicated with the heating container and a water outlet end and an electric heater, and the electric heater comprises an insulating material on the outer layer and an electric heating base body in the electric heater. At least one part of the electric heater in the length direction and at least one part of the water outlet pipe in the length direction are contained in at least one part of the water inlet pipe in the length direction at the same time, and an electric heating base body of the electric heater located in the water inlet pipe is insulated from the outside through an insulating material. According to the water drinking equipment, the heating and heat exchange efficiency and the energy utilization rate are improved, the stability of the outlet water temperature is improved, and the water drinking experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to a drinking water device. Background Technology

[0002] Currently, integrated water purifiers and water heaters on the market, such as four-faucet drinking fountains, are water purifiers with heating functions and multiple water outlets, commonly known as "one-on-three-temperature" water purifiers. These integrated water purifiers and water heaters are often used in schools and similar places. The heating container (such as an electric heating tank or a heating element) heats the purified water, and the heated or warm purified water, or water that has undergone heat exchange, is available for multiple students to drink simultaneously through multiple outlets.

[0003] However, during breaks, when multiple students simultaneously turn on multiple taps to get water, the water temperature becomes extremely unstable, dropping rapidly. Conversely, when fewer students are using water and only one tap is turned on, the water temperature remains very high. This creates a poor user experience. Furthermore, existing water purifiers and heaters suffer from low heating and heat exchange efficiency and low energy utilization. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of low heating and heat exchange efficiency and unstable water temperature in the existing integrated water purifier and heat exchanger, and to provide a drinking water device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A drinking water device includes a heating container, a water purification unit, an inlet pipe connecting the water purification unit and the heating container, and an outlet pipe connecting the heating container and an outlet end. The drinking water device also includes an electric heater, which includes an outer insulating material and an inner electric heating base. At least a portion of the electric heater along its length and at least a portion of the outlet pipe along its length are simultaneously housed within at least a portion of the inlet pipe along its length. The electric heating base of the electric heater located within the inlet pipe is insulated from the outside by the insulating material.

[0007] In this design, the drinking water device incorporates at least a portion of the electric heater along its length and at least a portion of the outlet pipe along its length within at least a portion of the inlet pipe, forming a heat exchanger. On one hand, the cold purified water in the inlet pipe exchanges heat with the high-temperature water in the outlet pipe, and the electric heater can also be used to heat the cold purified water, improving heating and heat exchange efficiency and reducing the energy consumption of the heating container for heating the cold purified water. On the other hand, the high-temperature water in the outlet pipe, after heat exchange, has a lower temperature. Alternatively, if a large amount of water is used, causing the water temperature in the outlet pipe to be too low after heat exchange, the electric heater can be used to reheat it, making it easier to adjust the outlet water temperature and maintain it at a suitable drinking temperature. Therefore, this drinking water device improves heating and heat exchange efficiency and energy utilization, enhances the stability of the outlet water temperature, and improves the user's drinking experience. The electric heating element inside the inlet pipe is insulated from the outside by insulating material, ensuring electrical insulation and leak-proof insulation.

[0008] Preferably, the electric heater and the water outlet pipe, which are at least partially located within the water inlet pipe, are coiled together in a spiral shape with the water inlet pipe.

[0009] In this design, the electric heater inside the inlet pipe, the outlet pipe, and the inlet pipe are spiral-shaped, which extends the water flow path and makes heat exchange more efficient; it also allows for a longer response time to adjust the outlet water temperature, making it easier to maintain a stable outlet water temperature.

[0010] Preferably, the electric heater further includes two terminals, which are located at both ends of the electric heater outside the water inlet pipe, and the two ends of the electric heating base are electrically connected to the two terminals respectively.

[0011] In this design, two terminals are located at the two ends of the electric heater outside the water inlet pipe to ensure electrical insulation and safety.

[0012] Preferably, the outlet pipe is provided with a first temperature sensor on the side outside the inlet pipe and near the outlet end;

[0013] And / or, a second temperature sensor is provided inside the heating container.

[0014] In this solution, the first temperature sensor detects the outlet water temperature and adjusts the heating power of the heating container and / or electric heater based on the detected temperature. The second temperature sensor detects the heated water temperature and adjusts the heating power of the heating container accordingly.

[0015] Preferably, the water inlet pipe is also connected to a water inlet pump between the water purification unit and the heating container.

[0016] In this solution, the water inlet pump provides the power for water intake and / or regulates the water flow rate.

[0017] Preferably, the drinking water device includes a plurality of water outlets, and each water outlet is connected to a solenoid valve and / or a flow meter.

[0018] In this solution, the solenoid valve mentioned above can be used to regulate the water flow rate, preventing the water temperature from dropping too quickly. A flow meter can detect the water flow rate, thereby determining whether to add water to the heating container and adjusting the inlet flow rate to ensure a stable water output at all multiple outlets.

[0019] Preferably, the water purification unit includes a water tank and at least one filter device, the filter device being connected to an external water source, the top of the water tank being connected to the filter device, and the bottom of the water tank being connected to the heating container via the water inlet pipe;

[0020] The water tank is equipped with a liquid level detection device for detecting the water level; and / or, the water tank is equipped with a sterilizer at the bottom outlet where the water tank is connected to the water inlet pipe.

[0021] In this design, the water purification unit filters external water sources through a filtration device to obtain purified water. The filtered water flows into the top of the water tank, and the water pressure generated by the stored water provides the power for the water flow, which then flows out from the bottom to supply the heating container. A water level detection device monitors the water level, ensuring timely replenishment. A sterilizer is installed at the bottom outlet of the water tank for more thorough sterilization, eliminating dead zones within the tank.

[0022] Preferably, a one-way valve is connected between the water tank and the filter device, and the one-way valve is used to control the flow of filtered water into the water tank.

[0023] In this solution, the filtered water is controlled by the aforementioned one-way valve to flow into the water tank in one direction only, and cannot flow back into the filtration device, thus avoiding damage to the filtration device.

[0024] Preferably, the outlet of the heating container includes a first outlet branch and a second outlet branch. The first outlet branch is connected to the outlet end of the drinking water device through the outlet pipe, and the second outlet branch is connected to an external hot water user.

[0025] In this design, the heating container has two outlet branches to meet different water or drinking water needs. The first outlet branch outputs high-temperature hot water, which, after heat exchange and cooling, is provided as warm drinking water. The second outlet branch outputs high-temperature hot water directly to users requiring it, eliminating waste of the hot water in the container. Furthermore, by controlling the flow rate of the second outlet branch, the amount of hot water output from the first outlet branch can be adjusted to better meet different water consumption needs; conversely, controlling the flow rate of the first outlet branch can also adjust the amount of hot water output from the second outlet branch.

[0026] Preferably, the heating container further includes a drain outlet, with the water outlet located at the top of the heating container and the drain outlet located at the bottom of the heating container, for discharging wastewater accumulated in the heating container.

[0027] In this solution, the water outlet is located at the top of the heating container, so that the water inside the container is fully heated and filled before being output from the top; the sewage outlet is located at the bottom of the heating container to discharge the sediment or sewage accumulated at the bottom, thus keeping the water clean.

[0028] The positive and progressive effects of this utility model are as follows: the drinking water equipment improves heating and heat exchange efficiency and energy utilization, and improves the stability of the outlet water temperature, thereby enhancing the user's drinking water experience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the connection structure of the drinking water device according to an embodiment of the present utility model.

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the water outlet pipe and electric heater in the water inlet pipe according to an embodiment of the present invention.

[0031] Figure 3 This is a flowchart illustrating the operation steps of the drinking water device according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] Drinking water equipment 1

[0034] Heating container 2

[0035] Heat pump 3

[0036] Liquid level probe 31

[0037] Electric heating rod 32

[0038] First water outlet branch 33

[0039] Second water outlet branch 34

[0040] Sewage outlet 35

[0041] Electric ball valve 36

[0042] Hot water solenoid valve 37

[0043] Water inlet pipe 4

[0044] First check valve 41

[0045] Second check valve 42

[0046] First inlet solenoid valve 43

[0047] Second inlet solenoid valve 44

[0048] Inlet pump 45

[0049] Booster pump 46

[0050] Water outlet pipe 5

[0051] First sterilizer 50

[0052] First water outlet 51

[0053] Second water outlet 52

[0054] Third water outlet 53

[0055] First outlet solenoid valve 54

[0056] Second water outlet solenoid valve 55

[0057] Third outlet solenoid valve 56

[0058] First flow meter 57

[0059] Second flow meter 58

[0060] Third flow meter 59

[0061] Electric heater 6

[0062] Insulating material 61

[0063] Electric heating substrate 62

[0064] Terminal block 63

[0065] Casing 64

[0066] First temperature sensor 7

[0067] Second temperature sensor 8

[0068] External water source 9

[0069] Water purification unit 10

[0070] Water tank 11

[0071] Liquid level detection device 110

[0072] Second sterilizer 111

[0073] Exhaust port 112

[0074] Filter device 12

[0075] CPP composite filter element 121

[0076] NF nanofiltration membrane filter element 122

[0077] MPF composite filter element 123

[0078] Wastewater solenoid valve 124

[0079] Wastewater outlet 125 Detailed Implementation

[0080] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0081] This embodiment provides a drinking water device 1, which is an integrated water purification and heating machine that has both water purification and water heating functions.

[0082] like Figure 1 and Figure 2 As shown, the drinking water device 1 includes a heating container 2, a water purification unit 10, an inlet pipe 4 connecting the water purification unit 10 and the heating container 2, and an outlet pipe 5 connecting the heating container 2 and the outlet. The drinking water device 1 also includes an electric heater 6, which includes an outer insulating material 61 and an inner electric heating base 62. At least a portion of the electric heater 6 along its length and at least a portion of the outlet pipe 5 along its length are simultaneously housed within at least a portion of the inlet pipe 4 along its length. The electric heating base 62 of the electric heater 6 located within the inlet pipe 4 is insulated from the outside by the insulating material 61.

[0083] Specifically, in this embodiment, the water purification unit 10 includes a water tank 11 and a filter device 12, etc., to process externally supplied cold water to obtain hygienic and clean cold water. The water purification unit 10 delivers the cold purified water (i.e., cold pure water) to the heating container 2 for heating through the water inlet pipe 4. The heating container 2 is specifically a heating tank 3. A liquid level probe 31 is provided on the top of the heating tank 3 to detect the hot water level in the heating tank 3 in real time. When the liquid level probe 31 detects that the water level is too low, it will feed back to the control system (not shown in the figure), and the control system will adjust the water inlet flow of the water purification unit 10. The water inlet pipe 4 enters from the bottom of the heating tank 3. Near the water inlet of the heating tank 3, a first one-way valve 41 is provided on the water inlet pipe 4. The first one-way valve 41 controls the cold purified water to flow into the heating tank 3 in one direction and prevents it from flowing back into the water tank 11. Therefore, the first one-way valve 41 can prevent the expansion of the heating tank 3 during heating from causing hot water to flow back into the water tank 11 and damage the water tank 11. The front end of the first one-way valve 41 is also connected to the first inlet solenoid valve 43 to control the flow rate and speed of water flowing into the heating tank 3. An electric heating rod 32 is also provided at the bottom of the heating tank 3. When the electric heating rod 32 is energized and generates heat, the heat generated can heat the low-temperature water inside the heating tank 3. The heating tank 3 is connected to the outlet end through the outlet pipe 5 to output hot water.

[0084] like Figure 2As shown, the electric heater 6 is a tubular, coaxial electric heating element. Its outer insulating material 61 is specifically magnesium oxide powder, and its inner electric heating substrate 62 is specifically a heating wire. Magnesium oxide powder has excellent thermal conductivity and electrical insulation properties, enabling it to quickly conduct the heat from the heating wire to the outer layer after it becomes conductive and heated, while also providing electrical insulation between the heating wire and the outside. The electric heater 6 inside the water inlet pipe 4 has an outer shell 64 beyond the magnesium oxide powder, with the magnesium oxide powder filling this shell 64. A section of the water outlet pipe 5 and part of the electric heater 6 are located within a section of the water inlet pipe 4, forming a structure where the inner and outer pipes cooperate. The water outlet pipe 5 is the inner pipe, and the water inlet pipe 4 is the outer pipe. Cold clean water flows between the inner and outer pipes, while hot water from the heating element 3 flows through the inner pipe, and the cold and hot water flow in opposite directions.

[0085] The drinking water device 1, with at least a portion of the electric heater 6 along its length and at least a portion of the outlet pipe 5 along its length simultaneously housed within at least a portion of the inlet pipe 4 along its length, constitutes a heat exchanger. On one hand, the cold purified water in the inlet pipe 4 exchanges heat with the high-temperature water in the outlet pipe 5. If necessary, the electric heater 6 can also be used to heat the cold purified water, improving heating and heat exchange efficiency and reducing the energy consumption of the heating container 2 in heating the cold purified water. On the other hand, the high-temperature water in the outlet pipe 5, after heat exchange, has a lower temperature. Alternatively, if a large amount of water is used, causing the water temperature in the outlet pipe 5 to be too low after heat exchange, the electric heater 6 can be used to reheat it, making it easier to adjust the outlet water temperature and maintain it at a suitable drinking temperature. Therefore, the drinking water device 1 improves heating and heat exchange efficiency and energy utilization, enhances the stability of the outlet water temperature, and improves the user's drinking experience. The electric heating element 62 inside the inlet pipe 4 is insulated from the outside by an insulating material 61, ensuring electrical insulation and leak-proof insulation.

[0086] Among them, such as Figure 1 As shown, the electric heater 6 and the outlet pipe 5, which are at least partially located inside the inlet pipe 4, are coiled together in a spiral shape with the inlet pipe 4. The spiral shape of the electric heater 6, the outlet pipe 5, and the inlet pipe 4 extends the water flow path, resulting in more thorough heat exchange; it also allows for a longer response time to outlet water temperature adjustments, making it easier to maintain a stable outlet water temperature.

[0087] Among them, such as Figure 1 As shown, the electric heater 6 also includes two terminals 63, which are located at both ends of the electric heater 6 outside the water inlet pipe 4. The two ends of the electric heating base 62 (i.e., the heating wire) are electrically connected to the two terminals 63 respectively. Placing the two terminals 63 outside the water inlet pipe 4 ensures electrical insulation and safety.

[0088] The outlet pipe 5 is equipped with a first temperature sensor 7 on the side outside the inlet pipe 4 and near the outlet end; and / or, the heating container 2 is equipped with a second temperature sensor 8. The first temperature sensor 7 can detect the outlet water temperature after heat exchange in real time, and adjust the heating power of the heating container 2 and / or the electric heater 6 according to the detected temperature. The second temperature sensor 8 can detect the heated water temperature and adjust the heating power of the heating container 2 in a timely manner.

[0089] In this embodiment, two temperature sensors are provided: a first temperature sensor 7 and a second temperature sensor 8, which are respectively installed in the water outlet pipe 5 and the heating container 2, to better detect the water temperature at different locations. In other embodiments, the number and location of the temperature sensors can be adjusted as needed; that is, there can be only one temperature sensor, or more temperature sensors can be installed at different locations.

[0090] The drinking water device 1 includes three outlets: a first outlet 51, a second outlet 52, and a third outlet 53. Each outlet is connected to a solenoid valve and a flow meter: a first outlet solenoid valve 54, a second outlet solenoid valve 55, a third outlet solenoid valve 56, and a first flow meter 57, a second flow meter 58, and a third flow meter 59. A first sterilizer 50, a UV sterilizer, is also connected to the side of the outlet pipe 5 closest to the outlet. After heat exchange, the warm purified water (i.e., pure water at a certain temperature) is sterilized by the first sterilizer 50 and then flows sequentially from each flow meter and outlet solenoid valve to each outlet. The outlet solenoid valves can be used to adjust the water flow rate to prevent the water temperature from dropping too quickly. The flow meters can detect the water flow rate to determine whether to add water to the heating container 2 and to adjust the inlet flow rate, ensuring a stable water output from all outlets.

[0091] like Figure 1 As shown, the water inlet pipe 4 is also connected to the water inlet unit and the heating container 2 by a water inlet pump 45. This water inlet pump 45 is a self-priming pump that provides the power for water intake and / or regulates the water flow rate.

[0092] The water purification unit 10 includes a water tank 11 and three filtration devices 12. Along the water inlet direction, the three filtration devices 12 are, in sequence, a CPP (cast polypropylene) composite filter element, an NF nanofiltration membrane filter element 122, and an MPF ​​composite filter element 123. The CPP composite filter element 121 can be a composite of polypropylene meltblown and activated carbon, a carbon fiber filter element, or a composite of polypropylene meltblown and carbon rods, and is connected to an external water source. The NF nanofiltration membrane filter element 122 has a flux of 400G. In other embodiments, the NF nanofiltration membrane filter element 122 can also be a membrane element with other fluxes, such as 300G, 500G, 600G, 800G, 1000G, etc., and can be set according to design requirements. The MPF composite filter element 123 can be a carbon rod filter element, a granular activated carbon filter element, or a filter element combining carbon rods and ultrafiltration membranes, etc. The MPF composite filter element 123 is connected to the top of the water tank 11 via a second one-way valve 42. A second inlet solenoid valve 44 and a booster pump 46 are sequentially connected between the NF nanofiltration membrane filter element 122 and the CPP composite filter element 121 along the water inlet direction. The second inlet solenoid valve 44 controls the water inlet speed and / or flow rate, while the booster pump 46 pressurizes the inlet water to provide power for the inlet. The NF nanofiltration membrane filter element 122 is also connected to the wastewater outlet 125 through a wastewater solenoid valve 124, hence the wastewater solenoid valve 124 is also called a wastewater solenoid valve. This wastewater solenoid valve has two states: one is a normally closed state, in which the solenoid valve can still maintain a certain flow rate of wastewater, which is the nominal wastewater flow rate of the solenoid valve; the other state is a normally open state, that is, the solenoid valve is fully open. The second one-way valve 42 is used to control that the filtered water can only flow into the water tank 11 in one direction and cannot flow back into the filter device 12, thus avoiding damage to the filter device 12.

[0093] The top of the water tank 11 is also provided with an exhaust port 112 to expel the air inside the water tank 11 and ensure that the pressure of the entire water tank 11 is consistent with the atmospheric pressure. The bottom of the water tank 11 is connected to the heating container 2 through the water inlet pipe 4. The water tank 11 is also provided with a liquid level detection device 110 for detecting the water level. The liquid level detection device 110 is specifically a liquid level float ball, which has high water level, medium water level and low water level. The position of the clean water outlet at the bottom of the water tank 11 is lower than the low water level. A second sterilizer 111 is provided at the bottom outlet of the water tank 11.

[0094] The water purification unit 10 filters external water through the filter device 12 to obtain purified water. The filtered purified water flows into the top of the water tank 11, and the water pressure generated by the stored water in the tank provides the water flow power, allowing it to flow out from the bottom and supply the heating container 2. The water level is detected by the liquid level detection device 110, ensuring timely replenishment. A second sterilizer 111 is installed at the bottom outlet of the water tank 11 for more thorough sterilization, avoiding dead zones within the water tank 11.

[0095] like Figure 1As shown, the outlet of the heating container 2 is divided into two branches: a first outlet branch 33 and a second outlet branch 34. The first outlet branch 33 is connected to the outlet of the drinking water device 1 via an outlet pipe 5, and the second outlet branch 34 is connected to an external hot water user via a hot water solenoid valve 37. The heating container 2, through these two outlet branches, can meet different water or drinking water needs. Specifically, it can output high-temperature hot water through the first outlet branch 33, which, after heat exchange and cooling, provides warm drinking water to users. Alternatively, it can output high-temperature hot water through the second outlet branch 34, directly supplying it to users who require hot water, thus avoiding waste of the hot water in the heating container 2. Furthermore, by controlling the flow rate of the second outlet branch 34, the amount of hot water output from the first outlet branch 33 can be adjusted to better meet different water demand scenarios; conversely, the amount of hot water output from the second outlet branch 34 can also be adjusted by controlling the flow rate of the first outlet branch 33.

[0096] The heating container 2 also includes a drain outlet 35. The water outlet of the heating container 2 is located at the top of the heating container 2, and the drain outlet 35 is located at the bottom of the heating container 2. The drain outlet 35 is connected to an electric ball valve 36 for discharging wastewater accumulated in the heating container 2. Placing the water outlet at the top of the heating container 2 ensures that the water in the container is fully heated and filled before being discharged from the top; placing the drain outlet 35 at the bottom of the heating container 2 discharges sediment or wastewater accumulated at the bottom, keeping the water quality clean.

[0097] In this embodiment, each electric heater 6 or electric heating rod 32, terminal block 63, sensor, solenoid valve, flow meter, water inlet pump 45, booster pump 46 and filter device 12 are connected to the control system so that the control system can coordinate and control each electronic component to perform functions such as rinsing, water making, cleaning, heating and water output.

[0098] like Figure 3 As shown, when using this drinking water device 1, its operating principle and operation steps can be as follows:

[0099] 1. Flushing process (i.e., the drinking water equipment 1 is powered on and flushing is performed): After the whole machine is powered on from the power-off state, the second water inlet solenoid valve 44 is opened, the booster pump 46 is opened, and the wastewater solenoid valve 124 is opened. The flushing time is 60 seconds. After 60 seconds, the system enters the next logic.

[0100] 2. Water production process: When the high-pressure switch detects that the water pressure in the system of the drinking water device 1 is less than 0.15 MPa, it enters this mode. When entering this mode, the second inlet solenoid valve 44 and the booster pump 46 are opened. The system starts producing water until the high-pressure switch in the system detects that the pressure value reaches 0.3 MPa, at which point water production stops, that is, the second inlet solenoid valve 44 closes and the booster pump 46 shuts down.

[0101] 3. Full water flushing process: When the high-pressure switch in the system detects that the pressure value is equal to the system preset pressure, the whole machine stops water production and enters the flushing process, that is, the second water inlet solenoid valve 44 opens, the booster pump 46 opens, and the wastewater solenoid valve opens. The duration is 30 seconds.

[0102] 4. Cleaning Process: After the system is full of water, the first inlet solenoid valve 43 and the hot water solenoid valve open, allowing purified water from water tank 11 to replenish the heating element 3. During this replenishment process, if the system detects a pressure value lower than the preset pressure, it can simultaneously enter the water production mode, meaning water production and cleaning occur concurrently. This continues until the level probe 31 detects the water level. At this point, the first inlet solenoid valve 43 and the hot water solenoid valve close, and all three outlet solenoid valves open for 5 minutes. This time can be preset according to system requirements. After 5 minutes, the three outlet solenoid valves close, and the water production process stops when the pressure reaches the preset value.

[0103] 5. Drainage process: After the water production process stops, the first inlet solenoid valve 43 opens, the electric ball valve 36 connected to the drain outlet 35 opens, and the hot water solenoid valve connected to the second outlet branch 34 opens. The process lasts for 30 minutes. This time can be preset according to the system. Here it is defined as 30 minutes. After 30 minutes, the above actions will stop.

[0104] 6. Water production process: After the system completes the purging process, it enters the above process. After the system is full of water, the first inlet solenoid valve 43 opens and the hot water solenoid valve opens, and purified water is added to the heating tank 3. At this time, the system simultaneously detects the pressure value. If the pressure value is less than the system preset value of 0.15Mpa, the system will simultaneously carry out the water production process.

[0105] 7. Heating process: When the liquid level probe 31 detects the liquid level, the system starts the electric heater 6. When the temperature probe detects that the temperature has reached the system preset value of 95℃, the heating stops.

[0106] 8. Full pipeline sterilization: When the electric heater 6 stops heating, the hot water solenoid valve, the three outlet solenoid valves at the three outlet ends, the first inlet solenoid valve 43, and the first sterilizer 50 in the system are opened simultaneously for 5 minutes to sterilize the five outlet pipes in all directions. At the same time, the system also detects the pressure value. If it is lower than the preset pressure, water production will also be carried out at the same time.

[0107] 9. Draining Process: When the system is preset to begin draining at 3:00 AM daily, the system will open the first inlet solenoid valve 43, the hot water solenoid valve, the three outlet solenoid valves at the three outlet ends, and the electric ball valve 36 for 50 minutes. During this time, the system will have completely drained the water from the internal containers and pipes. After executing this command, the system will enter water production mode. The entire system will cycle in this manner.

[0108] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A water drinking device, comprising a heating container, a water purification unit, a water inlet pipe connecting the water purification unit and the heating container, and a water outlet pipe connecting the heating container and a water outlet end, characterized in that, the water drinking device further comprises an electric heater, the electric heater comprising an outer layer of insulating material and an inner electric heating base, at least a part of the length direction of the electric heater and at least a part of the length direction of the water outlet pipe are simultaneously contained in at least a part of the length direction of the water inlet pipe, the electric heating base of the electric heater located in the water inlet pipe is insulated from the outside by the insulating material.

2. The drinking water apparatus of claim 1, wherein The electric heater and the water outlet pipe located at least partially in the water inlet pipe are coiled into a spiral shape together with the water inlet pipe.

3. The drinking water apparatus of claim 1, wherein, The electric heater further comprises two wiring terminals, the two wiring terminals being arranged at the two ends of the electric heater outside the water inlet pipe, and the two ends of the electric heating base being electrically connected to the two wiring terminals, respectively.

4. The drinking water apparatus of claim 1, wherein, The water outlet pipe is provided with a first temperature sensor on the side outside the water inlet pipe and close to the water outlet end. And / or, the heating container is provided with a second temperature sensor.

5. The drinking water apparatus of claim 1, wherein, The water inlet pipe is further connected with a water inlet pump between the water purification unit and the heating container.

6. The drinking water apparatus of claim 1, wherein, The water drinking device comprises a plurality of water outlet ends, and the water outlet pipe is connected with a solenoid valve and / or a flow meter at each water outlet end.

7. The drinking water apparatus of claim 1, wherein The water purification unit comprises a water tank and at least one filtering device, the filtering device being connected to an external water source, the top of the water tank being connected to the filtering device, and the bottom of the water tank being connected to the heating container through the water inlet pipe; The water tank is provided with a liquid level detection device for detecting the water level; and / or, the water tank is provided with a sterilizer at the bottom outlet of the water tank connected to the water inlet pipe.

8. The drinking water apparatus of claim 7, wherein, A one-way valve is connected between the water tank and the filtering device, and the one-way valve is used to control the filtered water into the water tank.

9. The drinking water apparatus of claim 1, wherein, The water outlet of the heating container comprises a first water outlet branch and a second water outlet branch, the first water outlet branch being connected to the water outlet end of the water drinking device through the water outlet pipe, and the second water outlet branch being connected to an external hot water user.

10. The drinking water apparatus of claim 9, wherein, The heating container further comprises a sewage outlet, the water outlet being arranged at the top of the heating container, and the sewage outlet being arranged at the bottom of the heating container for discharging the waste water accumulated in the heating container.

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