Liquid heating device and water dispenser

Abstract

The utility model discloses a liquid heating device and water dispenser, the utility model discloses a liquid heating device passes through the design spiral inside flow and reverse outside flow's double heat exchange path, has fully utilized the heat of the inner wall and outer wall of heating pipe. Spiral flow guide piece has prolonged the path of water flow in the heating pipe, has increased heat exchange area and time. The reverse flow process of water flow after flowing out the heating pipe, has recovered the waste heat of the outer wall of heating pipe effectively. This design has improved the thermal energy utilization rate significantly, has reduced the heat loss, has maintained the compactness of device structure simultaneously. Therefore, the application realizes more efficient liquid heating process, improves the overall performance and energy utilization efficiency of heating device.

Description

Technical Field

[0001] This utility model relates to the field of liquid heating technology, and in particular to a liquid heating device and a water dispenser. Background Technology

[0002] Currently, most water dispenser heaters on the market use traditional electric heating element storage-type heating technology. Some high-end products are beginning to try instant heating technology, often using thick-film heaters and quartz tube heating technology. In existing technologies, a spiral-shaped flow guide is often set inside the heating chamber. The flow guide and the inner wall of the heating chamber can form a spiral water flow channel. This increases the path of water flow within the heating chamber, thereby increasing the contact area between the water flow and the inner wall of the heating chamber. However, after flowing through the spiral water flow channel, the water flows directly out of the heating device without contacting the outer wall of the heating element for heating, reducing the effective utilization rate of the heating element and the heating effect on the water. Utility Model Content

[0003] The main purpose of this invention is to propose a liquid heating device, which aims to solve the technical problem of how to improve the effective utilization rate and heating effect of the liquid heating device.

[0004] To achieve the above objectives, the liquid heating device proposed in this utility model includes: The outer casing has a first water inlet, a first water outlet and a heating chamber. The first water inlet and the first water outlet are both connected to the heating chamber. The first water inlet is located at one end of the outer casing along its length, and the first water outlet is located at one end of the outer casing near the first water inlet. A heating element is installed inside the heating chamber. A second water inlet and a second water outlet are respectively provided at both ends of the heating element. The second water inlet is connected to the first water inlet so that external water can flow into the heating element through the first water inlet and the second water inlet. A spiral guide is installed inside the heating tube and forms a first spiral flow channel inside the heating tube; after the external water flows into the heating tube, it flows along the first spiral flow channel to the second outlet, and after flowing out of the heating tube, it flows in the opposite direction to the first outlet.

[0005] Optionally, the spiral guide includes a core rod and spiral blades. The core rod extends along the length of the heating tube, and the spiral blades are connected to the peripheral wall of the core rod, extending spirally around the peripheral wall of the core rod.

[0006] Optionally, the outer edge of the helical blade is connected to the inner wall of the heating tube.

[0007] Optionally, a second spiral flow channel is formed between the inner wall of the outer shell and the outer wall of the heating tube. The second spiral flow channel extends spirally around the circumference of the heating tube. After the water in the heating tube flows out of the second outlet, it flows along the second spiral flow channel to the first outlet.

[0008] Optionally, the inner wall of the outer casing is provided with a spiral pattern, which extends circumferentially around the heating tube, and the second spiral flow channel is formed by the spiral pattern.

[0009] Optionally, the outer casing and the heating tube extend vertically, and the first water inlet and the first water outlet are both located at the upper end of the outer casing, with the position of the first water inlet higher than that of the first water outlet.

[0010] Optionally, the second water inlet is located at the top of the heating tube, and the second water outlet is located at the bottom of the heating tube; the position of the first water inlet is higher than the position of the second water inlet, and the first water inlet and the second water inlet are sealed and connected.

[0011] Optionally, the outer casing and the heating tube extend laterally, the first water inlet is located on one side of the second water inlet along the lateral direction, and the first water outlet is located on the outer wall of the outer casing facing upward.

[0012] Optionally, the outer casing is made of stainless steel, and the heating element is made of ceramic.

[0013] This utility model also proposes a water dispenser, including a water dispensing valve and a liquid heating device as described above, wherein the water dispensing valve is connected to the first water outlet of the liquid heating device.

[0014] This invention discloses a liquid heating device that fully utilizes the heat from both the inner and outer walls of the heating tube by designing a dual heat exchange path of spiral inward flow and reverse outward flow. The spiral guide extends the path of the water flow within the heating tube, increasing the heat exchange area and time. The reverse flow of the water after exiting the heating tube effectively recovers the residual heat from the outer wall of the heating tube. This design significantly improves thermal energy utilization, reduces heat loss, and maintains the compactness of the device structure. Therefore, this application achieves a more efficient liquid heating process, improving the overall performance and energy utilization efficiency of the heating device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the liquid heating device of this utility model; Figure 2 This is an exploded view of the liquid heating device of this utility model; Figure 3 This is a structural cross-sectional view of an embodiment of the liquid heating device of this utility model; Figure 4 This is a structural anatomical view of the liquid heating device of this utility model; Figure 5 This is a structural cross-sectional view of another embodiment of the liquid heating device of this utility model. Explanation of icon numbers: The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] This utility model proposes a liquid heating device, aiming to solve the technical problem of how to improve the effective utilization rate and heating effect of the liquid heating device.

[0021] In the embodiments of this utility model, such as Figures 1 to 4 As shown, the liquid heating device includes: a housing 10, which has a first inlet 11, a first outlet 12, and a heating chamber 13. Both the first inlet 11 and the first outlet 12 are connected to the heating chamber 13. The first inlet 11 is located at one end of the housing 10 along its length, and the first outlet 12 is located at the end of the housing 10 near the first inlet 11. A heating tube 20 is installed inside the heating chamber 13, and each end of the heating tube 20 has a second inlet. 21 and a second water outlet 22, the second water inlet 21 is connected to the first water inlet 11 so that external water can flow into the heating pipe 20 through the first water inlet 11 and the second water inlet 21; a spiral guide 30 is installed in the heating pipe 20 and forms a first spiral flow channel 33 in the heating pipe 20; after the external water flows into the heating pipe 20, it flows along the first spiral flow channel 33 to the second water outlet 22, and after flowing out of the heating pipe 20, it flows in the opposite direction to the first water outlet 12.

[0022] In this embodiment, the outer shell 10 refers to the shell structure used to house the heating tube 20 and guide the water flow path. Specifically, it can be made of stainless steel, such as 316 stainless steel or other safe food-grade metals, thus ensuring that the outer shell 10 will not decompose and release harmful substances when heated. The first water inlet 11 and the first water outlet 12 on the outer shell 10 are both located at the same end. By setting the water inlet and outlet on the same side, the water flow is forced to form a reverse flow path inside and outside the heating tube 20, thereby prolonging the residence time of the water flow in the heating chamber 13. The heating tube 20 refers to the tubular structure installed inside the outer shell 10 for directly heating the water flow. Specifically, it can be made of ceramic tube material. The heating tube 20 can generate heat when energized. It has a second water inlet 21 and a second water outlet 22 at its two ends. The second water inlet 21 is connected to the first water inlet 11 of the outer shell 10, so that the water flow first enters the heating tube 20 for initial heating, and then is discharged to the external space of the heating tube 20 through the second water outlet 22. The spiral guide 30 refers to the component installed inside the heating tube 20 to adjust the water flow path. Specifically, it can be a combination structure of a core rod 31 and a spiral blade 32. The spiral blade 32 extends spirally around the periphery of the core rod 31 and connects to the inner wall of the heating tube 20 to form a first spiral flow channel 33, which forces the water to flow along the spiral path, increasing the contact area between the water and the inner wall of the heating tube 20 and the heating time.

[0023] By designing a dual flow path inside and outside the heating tube 20, the water is initially heated along the first spiral flow channel 33 inside the heating tube 20, and then flows in the opposite direction through the space between the outer wall of the heating tube 20 and the inner wall of the outer shell 10, using the residual heat of the outer wall of the heating tube 20 for secondary heating. This simultaneously utilizes the heat from both the inner and outer walls of the heating tube 20, thereby improving heating efficiency.

[0024] After entering the liquid heating device, the water first enters the outer casing 10 through the first inlet 11, and then enters the heating tube 20 through the second inlet 21. Inside the heating tube 20, the water flows along the first spiral flow channel 33 formed by the spiral guide 30, increasing the contact area and time with the inner wall of the heating tube 20 for initial heating. After reaching the second outlet 22 at the other end of the heating tube 20, the water flows out of the heating tube 20 but remains inside the outer casing 10. At this point, the water changes direction and flows in the opposite direction along the space between the outer wall of the heating tube 20 and the inner wall of the outer casing 10, utilizing the residual heat of the outer wall of the heating tube 20 for secondary heating. Finally, the water, after being doubly heated, flows out of the liquid heating device from the first outlet 12 near the inlet end.

[0025] This design optimizes the water flow path, enabling full utilization of the heat from the inner and outer walls of the heating tube 20. The spiral guide 30 forces the water flow to form a spiral path inside the heating tube 20, extending the contact time between the water flow and the heating surface.

[0026] The above solution solves the problem of low heating efficiency caused by the water not contacting the outer wall of the heating tube 20 in traditional liquid heating devices. By designing a dual heat exchange path of spiral inward flow and reverse outward flow, the heat of both the inner and outer walls of the heating tube 20 is fully utilized. The spiral guide 30 extends the path of the water flow within the heating tube 20, increasing the heat exchange area and time. The reverse flow of the water after exiting the heating tube 20 effectively recovers the waste heat from the outer wall of the heating tube 20. This design significantly improves thermal energy utilization, reduces heat loss, and maintains the compactness of the device structure. Therefore, this application achieves a more efficient liquid heating process, improving the overall performance and energy utilization efficiency of the heating device.

[0027] For example, such as Figures 2 to 4 As shown, the spiral guide 30 includes a core rod 31 and a spiral blade 32. The core rod 31 extends along the length of the heating tube 20, and the spiral blade 32 is connected to the peripheral wall of the core rod 31. The spiral blade 32 extends spirally around the peripheral wall of the core rod 31.

[0028] The core rod 31 extends along the length of the heating tube 20 and can be made of silicone material, such as food-grade and high-temperature resistant silicone. The spiral blade 32 can be made of the same material as the core rod 31. The core rod 31 and the spiral blade 32 can be connected by welding, riveting, or integral molding.

[0029] When water flows into the heating tube 20 from the second inlet 21, the axial extension structure of the core rod 31 restricts the tendency of the water to flow in a straight line, forcing the water to enter the first spiral flow channel 33 formed by the spiral blades 32. The rigid support of the core rod 31 can resist the vibration caused by the impact of the water flow and prevent the spiral blades 32 from radially deviating and causing local blockage of the flow channel.

[0030] By defining the specific structure of the spiral guide 30, the problems of unstable formation and uneven water flow distribution in the first spiral channel 33 are solved. The design of the core rod 31 extending along the length of the heating tube 20 ensures the axial positioning stability of the guide within the heating tube 20, preventing channel deformation due to offset. The spiral blades 32 are connected to the peripheral wall of the core rod 31 and extend in a spiral shape, forming an integrated spiral support structure with the core rod 31, maintaining the continuity and regularity of the first spiral channel 33. The combined structure of the core rod 31 and the spiral blades 32 further enhances the mechanical strength of the guide, preventing deformation caused by water flow impact, thereby ensuring the long-term effectiveness of the first spiral channel 33.

[0031] Specifically, such as Figure 3 As shown, the outer edge of the spiral blade 32 is connected to the inner wall of the heating tube 20. The outer edge of the spiral blade 32 can abut against or be fixed to the inner wall of the heating tube 20. When the core rod 31 extends along the length of the heating tube 20, the rigid connection between the outer edge of the spiral blade 32 and the inner wall of the heating tube 20 can form a continuous support, and the torsional stress borne by the core rod 31 is transmitted to the inner wall of the heating tube 20 through the spiral blade 32.

[0032] After water enters the heating tube 20 through the first inlet 11, it flows along the first spiral flow channel 33 formed by the core rod 31 and the spiral blades 32. Because the outer edge of the spiral blades 32 is fixedly connected to the inner wall of the heating tube 20, the water flow is confined within the channel formed by the adjacent pitches of the spiral blades 32, preventing escape from the gap between the outer edge of the blades and the tube wall. As the water flows through the first spiral flow channel 33, its flow direction is forcibly changed to a spiral forward path.

[0033] The above technical solution eliminates the gap between the spiral blades 32 and the inner wall of the heating tube 20, ensuring that the water flow maintains close contact with the inner wall of the heating tube 20 when flowing in the first spiral channel 33, thus improving heat transfer efficiency. The rigid connection between the spiral blades 32 and the inner wall of the heating tube 20 enhances the overall structural stability of the guide component, preventing vibration or displacement caused by water flow impact or temperature changes, ensuring the shape of the first spiral channel 33 is maintained, and reliably achieving the extension effect of the water flow path. The heat from the inner wall of the heating tube 20 is directly transferred to the water flow through the outer edge of the spiral blades 32, forming a continuous heat exchange interface, optimizing the heat distribution and utilization efficiency inside the heating tube 20.

[0034] For example, such as Figure 3 As shown, a second spiral flow channel 14 is formed between the inner wall of the outer shell 10 and the outer wall of the heating tube 20. The second spiral flow channel 14 extends spirally around the heating tube 20. After the water in the heating tube 20 flows out of the second outlet 22, it flows along the second spiral flow channel 14 to the first outlet 12.

[0035] The second spiral flow channel 14 between the inner wall of the outer casing 10 and the outer wall of the heating tube 20 can be formed by spiral patterns 15 or guide protrusions. After the water has been heated by the first spiral flow channel 33 inside the heating tube 20, it is discharged from the second outlet 22 at the lower end of the heating tube 20. Under the constraint of the spiral patterns 15 on the inner wall of the outer casing 10, it forms a spiral upward motion along the annular space between the outer wall of the heating tube 20 and the inner wall of the outer casing 10. During the spiral upward process, the water is in continuous contact with the outer wall of the heating tube 20. After the water has been heated twice in the second spiral flow channel 14, it is finally discharged from the first outlet 12 near the first inlet 11.

[0036] The above technical solution fully utilizes the space between the outer wall of the heating tube 20 and the inner wall of the outer casing 10 for secondary heat exchange. After the water is heated by the first spiral flow channel 33 inside the heating tube 20, it continues to flow spirally along the second spiral flow channel 14, extending the contact time and path between the water and the outer wall of the heating tube 20. This design allows for the effective utilization of the heat on the outer wall of the heating tube 20, avoiding the waste of residual heat caused by direct and rapid outflow. Through the synergistic effect of the inner and outer double spiral flow channels, the heat on both the inner and outer walls of the heating tube 20 is fully utilized, improving the overall heat exchange efficiency and heating effect.

[0037] Specifically, such as Figure 4 As shown, the inner wall of the outer casing 10 is provided with a spiral pattern 15, which extends circumferentially around the heating tube 20. The second spiral flow channel 14 is formed by the spiral pattern 15. The spiral pattern 15 can be implemented, including but not limited to, machining continuous spiral protrusions or spiral grooves on the inner wall of the outer casing 10. The gap between the spiral pattern 15 and the outer wall of the heating tube 20 is constructed as a flow channel with a continuous guiding structure. The pitch of the spiral pattern 15 can be adjusted as needed to control the water flow rate and heat exchange efficiency. The depth or height of the spiral pattern 15 can be designed according to the size of the gap between the outer casing 10 and the heating tube 20 to ensure the formation of an effective second spiral flow channel 14.

[0038] After flowing out of the heating tube 20, the water enters the second spiral flow channel 14 defined by the spiral pattern 15. The continuous protrusions or grooves of the spiral pattern 15 force the water to flow in the opposite direction of the spiral. Through the above technical solution, the water flow is effectively guided to flow uniformly along a predetermined spiral trajectory. The physical structure of the spiral pattern 15 defines the water flow path, avoids deviation of the flow direction, and ensures that the water flow forms a stable spiral motion between the outer wall of the heating tube 20 and the inner wall of the outer shell 10. This structural design prolongs the contact time between the water flow and the outer wall of the heating tube 20, promoting sufficient heat exchange. At the same time, the spiral pattern 15 enhances the mechanical strength of the inner wall of the outer shell 10 and reduces local overheating or cold spots by guiding the water flow to a uniform distribution. Therefore, this design significantly improves the flow stability and heat exchange efficiency of the water in the second spiral flow channel 14, thereby improving the overall heating effect. The main heating area of ​​the ceramic heating element 20 is located on its outer wall. If the spiral pattern 15 (inner wall of the outer shell 10) comes into contact with the outer wall of the ceramic heating element 20, heat will easily accumulate in the contact area, causing the temperature of the contact area to rise. This can lead to the ceramic heating element 20 breaking or failing due to the difference in thermal expansion coefficients. Therefore, a gap should be left between the spiral pattern 15 (inner wall of the outer shell 10) and the outer wall of the ceramic heating element 20. When water flows through this gap, it can carry away the heat from the outer wall of the ceramic heating element 20, thereby preventing the ceramic heating element 20 from breaking or failing and extending its service life.

[0039] For example, such as Figure 3 As shown, the outer shell 10 and the heating tube 20 extend in a vertical direction. The first water inlet 11 and the first water outlet 12 are both located at the upper end of the outer shell 10, with the position of the first water inlet 11 being higher than that of the first water outlet 12.

[0040] The vertically extending outer shell 10 and the heating tube 20 form a longitudinal flow channel, and the water flow inside the heating tube 20 flows downward under the action of gravity. The first inlet 11 is located at the highest point of the upper part of the outer shell 10, and the first outlet 12 is located at the same end but lower than the first inlet 11. The heating tube 20 is arranged vertically along the axis of the outer shell 10, and its top end is connected to the first inlet 11 through a sealing structure, and its bottom end extends to the lower end of the outer shell 10. The annular space between the inner wall of the outer shell 10 and the outer wall of the heating tube 20 forms a second spiral flow channel 14. After the water is initially heated in the heating tube 20, it flows out from the bottom end of the heating tube 20 and flows in the opposite direction along the second spiral flow channel 14, and finally is discharged from the first outlet 12.

[0041] After entering the outer casing 10 through the first inlet 11 at a higher position, the external water flow preferentially flows into the second inlet 21 at the top of the heating tube 20, and flows downward along the first spiral flow channel 33 inside the heating tube 20. The flow resistance is reduced due to the acceleration caused by gravity. After being heated, the water flows out from the bottom of the heating tube 20 and enters the annular space between the outer casing 10 and the heating tube 20, and flows back upward along the second spiral flow channel 14.

[0042] The above technical solution achieves a vertical layout of the outer shell 10 and heating tube 20, optimizing water flow dynamics through gravity. The vertically extending structure allows for natural convection during heating, reducing flow resistance. The first inlet 11 and the first outlet 12 are located at the upper end of the outer shell 10, with the first inlet 11 higher than the first outlet 12, ensuring a stable circulation path for the water flowing from top to bottom with gravity assistance. The high-position design of the first inlet 11 prevents air bubble retention and improves heating uniformity. The vertical layout compresses the lateral space of the device, enhancing structural compactness. Through the synergistic effect of gravity and thermal convection, heating efficiency and energy utilization are improved.

[0043] Specifically, such as Figure 3 As shown, the second water inlet 21 is located at the top of the heating tube 20, and the second water outlet 22 is located at the bottom of the heating tube 20; the position of the first water inlet 11 is higher than the position of the second water inlet 21, and the first water inlet 11 and the second water inlet 21 are sealed and connected.

[0044] The sealed connection between the first inlet 11 and the second inlet 21 can be achieved through a flange connection or a nested snap-fit ​​structure. The second inlet 21 is located at the top, allowing the water to flow naturally downwards under gravity, while the second outlet 22 is located at the bottom, extending the spiral path of the water flow within the heating pipe 20.

[0045] When external water enters through the first inlet 11, because the first inlet 11 is higher than the second inlet 21, the water flows into the top of the heating tube 20 under the action of gravity. The water flows downward along the first spiral flow channel 33 formed by the spiral guide 30, and after being heated inside the heating tube 20, it is discharged from the second outlet 22 at the lower end. The second spiral flow channel 14 between the inner wall of the outer casing 10 and the outer wall of the heating tube 20 guides the water to flow in the opposite direction, prolonging the heating time. The sealed connection between the first inlet 11 and the second inlet 21 eliminates the risk of leakage at the interface, ensuring that all water enters the heating tube 20.

[0046] The above technical solution optimizes the vertical flow path of the water. The second inlet 21 is located at the top of the heating tube 20, allowing external water to flow naturally downwards into the top of the heating tube 20 after passing through the first inlet 11, enhancing the smoothness of the water flow into the heating tube 20 using gravity. The second outlet 22 is located at the lower end of the heating tube 20, extending the spiral flow path of the water within the heating tube 20 and increasing the heating time. The sealed connection between the first inlet 11 and the second inlet 21 eliminates the risk of leakage at the connection point, ensuring that all water enters the heating tube 20 and avoiding energy loss. This design not only improves the efficiency of water entering the heating tube 20 but also extends the residence time of the water within the heating tube 20, thereby enhancing the overall heating effect.

[0047] For example, such as Figure 5 As shown, the outer shell 10 and the heating tube 20 extend laterally, the first water inlet 11 is located on one side of the second water inlet 21 along the lateral direction, and the first water outlet 12 is located on the outer wall of the outer shell 10 facing upward.

[0048] When the outer casing 10 and the heating tube 20 extend laterally, their length direction is parallel to the horizontal plane, and the first water inlet 11 and the second water inlet 21 are arranged on the same side laterally. After the external water flows into the outer casing 10 through the first water inlet 11, it is evenly distributed along the lateral flow direction to the second spiral flow channel 14 between the outer wall of the heating tube 20 and the inner wall of the outer casing 10. This arrangement allows the water to complete two heat exchanges during the lateral flow: the first exchange occurs within the heating tube 20 through the first spiral flow channel 33, and the second exchange occurs within the outer casing 10 through the second spiral flow channel 14, where the water contacts the outer wall of the heating tube 20.

[0049] The above technical solution effectively optimizes the water flow path control in horizontal installation scenarios. The water flow forms a laminar flow around the outer wall of the heating tube 20 within the annular channel, increasing the contact area between the liquid and the heating surface. This structural layout allows the device to maintain stable heat exchange efficiency even under horizontal installation conditions. Furthermore, by adjusting the relationship between the water flow direction and the position of the first outlet 12, the adaptability of the equipment to different installation spaces is enhanced.

[0050] For example, the outer casing 10 is made of stainless steel, and the heating tube 20 is made of ceramic tube.

[0051] This utility model also proposes a water dispenser, which includes a water dispensing valve and a liquid heating device. The specific structure of the liquid heating device is as described in the above embodiments. Since this water dispenser adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The water dispensing valve is connected to the first water outlet 12 of the liquid heating device.

[0052] This water dispenser uses data collection and analysis of flow rate and inlet / outlet water temperature parameters, along with software algorithms to precisely control power output, thus meeting users' needs for drinking water at different temperatures. If the water temperature is insufficient, the flow rate can be adjusted via a flow valve to ensure the required power output.

[0053] Specifically, the water dispenser also includes a flow valve, a Hall effect flow meter, an inlet water temperature sensor, an outlet water temperature sensor, and a pressure safety valve. Purified water first enters the adjustable flow valve, which regulates the flow rate into the liquid heating device. Then, the water enters the Hall effect flow meter, which measures the flow rate in real time and transmits the data to the control system. Next, the water enters the heating element 20, which is encased in a food-grade stainless steel (SUS316L) outer shell 10. During the heating process, the inlet and outlet water temperature sensors monitor the water temperature in real time and feed the temperature data back to the control system. Based on the collected flow and temperature parameters, the control system uses software algorithms to precisely control the power output of the heating element 20 to achieve the user's desired water temperature. If the water temperature does not reach the set value, the control system will control the flow valve to reduce the outlet water flow, thereby increasing the heating power to ensure the water temperature meets the requirements.

[0054] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A liquid heating device, characterized in that, include: The outer casing has a first water inlet, a first water outlet and a heating chamber. The first water inlet and the first water outlet are both connected to the heating chamber. The first water inlet is located at one end of the outer casing along its length, and the first water outlet is located at one end of the outer casing near the first water inlet. A heating element is installed inside the heating chamber. A second water inlet and a second water outlet are respectively provided at both ends of the heating element. The second water inlet is connected to the first water inlet so that external water can flow into the heating element through the first water inlet and the second water inlet. A spiral guide is installed inside the heating tube and forms a first spiral flow channel inside the heating tube; after the external water flows into the heating tube, it flows along the first spiral flow channel to the second outlet, and after flowing out of the heating tube, it flows in the opposite direction to the first outlet.

2. The liquid heating device as described in claim 1, characterized in that, The spiral guide includes a core rod and spiral blades. The core rod extends along the length of the heating tube, and the spiral blades are connected to the peripheral wall of the core rod, extending spirally around the peripheral wall of the core rod.

3. The liquid heating device as described in claim 2, characterized in that, The outer edge of the spiral blade is connected to the inner wall of the heating tube.

4. The liquid heating device as described in claim 1, characterized in that, A second spiral flow channel is formed between the inner wall of the outer shell and the outer wall of the heating tube. The second spiral flow channel extends spirally around the circumference of the heating tube. After the water in the heating tube flows out of the second outlet, it flows along the second spiral flow channel to the first outlet.

5. The liquid heating device as described in claim 4, characterized in that, The inner wall of the outer shell is provided with a spiral pattern, which extends circumferentially around the heating tube, and the second spiral flow channel is formed by the spiral pattern.

6. The liquid heating device as described in claim 1, characterized in that, The outer casing and the heating tube extend vertically. The first water inlet and the first water outlet are both located at the upper end of the outer casing, with the position of the first water inlet higher than that of the first water outlet.

7. The liquid heating device as described in claim 6, characterized in that, The second water inlet is located at the top of the heating tube, and the second water outlet is located at the bottom of the heating tube; the first water inlet is located higher than the second water inlet, and the first water inlet and the second water inlet are sealed and connected.

8. The liquid heating device as described in claim 1, characterized in that, The outer casing and the heating tube extend laterally, the first water inlet is located on one side of the second water inlet along the lateral direction, and the first water outlet is located on the outer wall of the outer casing facing upwards.

9. The liquid heating device as described in claim 1, characterized in that, The outer casing is made of stainless steel, and the heating element is made of ceramic.

10. A water dispenser, characterized in that, The liquid heating device includes a water intake valve as described in any one of claims 1 to 9, wherein the water intake valve is connected to the first outlet of the liquid heating device.

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