Liquid heating device and water dispenser

Abstract

The utility model discloses a liquid heating device and water dispenser, the liquid heating device adopts the heat preservation shell structure of integrated molding, avoided the process that traditional split type shell needs splicing installation, through the sleeve entry directly sets up in the outside of shell, has simplified the assembly flow. The first via hole and the second via hole that heat preservation shell set up can supply the water inlet joint and the water outlet joint on the shell and go out, both guarantee the pipeline connection function, and maintained the integrity of heat preservation shell. The nested combination mode of shell and heat preservation shell reduces the heat loss through reducing the seam quantity, and the one -way assembly path of sleeve entry improves the convenience of assembly.

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 tubes for water storage heating. Some high-end products are beginning to experiment with instant heating technology, often employing thick-film heaters and quartz tube heating technologies. Traditional electric heating tubes typically require preheating and storing a certain amount of hot water, resulting in high energy consumption and limited hot water supply. While thick-film and quartz tube instant heating technologies can achieve rapid heating, improvements are still needed in thermal efficiency, temperature control accuracy, water quality assurance, and safety. Related technologies use ceramic heating tubes to heat the liquid within the heating chamber, and an insulation shell is installed outside the heating chamber to achieve insulation and prevent human contact. However, the insulation shell consists of two half-shells, which need to be connected when installing it into the heating chamber, causing assembly inconvenience and poor insulation performance. 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 assembly convenience and heat preservation effect of the liquid heating device.

[0004] To achieve the above objectives, the liquid heating device proposed in this utility model includes:

[0005] The housing has an inlet, an outlet and a heating chamber, and the heating chamber connects the inlet and the outlet.

[0006] A water inlet connector is connected to the outer wall of the housing and communicates with the water inlet.

[0007] A water outlet connector is connected to the outer wall of the housing and communicates with the water outlet.

[0008] A ceramic heater, which is installed inside the heating chamber to heat the liquid flowing through the heating chamber;

[0009] The insulation shell is an integrally molded part. One end of the insulation shell has a sleeve inlet, and the insulation shell is sleeved onto the housing through the sleeve inlet. The insulation shell has a first through hole and a second through hole. The water inlet connector extends out of the insulation shell through the first through hole, and the water outlet connector extends out of the insulation shell through the second through hole.

[0010] Optionally, both the shell and the insulation shell are columnar, the inlet is located at the bottom of the insulation shell, and the bottom of the shell is provided with a flange, which is connected to the periphery of the inlet.

[0011] Optionally, the water inlet and the water outlet are located on the peripheral wall of the shell. The peripheral wall of the insulation shell has a first through groove and a second through groove extending along the height direction. One end of the first through groove passes through the first through hole, and the other end passes through the periphery of the sleeve inlet, so that the water inlet connector can move from the bottom end of the insulation shell along the first through groove to the first through hole. One end of the second through groove passes through the second through hole, and the other end passes through the periphery of the sleeve inlet, so that the water outlet connector can move from the bottom end of the insulation shell along the second through groove to the second through hole.

[0012] Optionally, the liquid heating device further includes a first heat insulation component and a second heat insulation component, wherein the first heat insulation component is filled in the first through groove, and the second heat insulation component is filled in the second through groove, and both the first heat insulation component and the second heat insulation component are made of foamed material.

[0013] Optionally, the water inlet is located near the bottom end of the housing, and the water outlet is located near the top end of the housing.

[0014] Optionally, the liquid heating device further includes an electrical control box located on one side of the insulation shell and adjacent to the insulation shell, and the second through slot is formed on the peripheral wall of the insulation shell facing the electrical control box, so that the electrical control box can at least partially cover the second through slot.

[0015] Optionally, the ceramic heater is in the shape of a hollow tube, with a first flow port at the lower end of the peripheral wall and a second flow port at the top wall, both the first and second flow ports connecting the heating chamber to the tube cavity of the ceramic heater.

[0016] Optionally, the housing may be a stainless steel housing, and the insulation may be a plastic housing.

[0017] Optionally, the peripheral wall of the insulation shell is provided with an installation port, and the liquid heating device further includes a thermal circuit breaker installed at the installation port. The thermal circuit breaker abuts against the shell and is used to detect the temperature of the shell and disconnect the power supply to the ceramic heater when the temperature of the shell reaches a preset temperature.

[0018] 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 water outlet connector of the liquid heating device.

[0019] In the technical solution of this utility model's liquid heating device, an integrally molded insulation shell structure is adopted, avoiding the splicing and installation process required by traditional split shells. It is directly fitted onto the outside of the shell through the inlet, simplifying the assembly process. The first and second through holes in the insulation shell allow the inlet and outlet connectors on the shell to pass through, ensuring both pipeline connection functionality and maintaining the integrity of the insulation shell. The nested combination of the shell and insulation shell effectively reduces heat loss by minimizing the number of seams, while the unidirectional assembly path of the inlet improves the ease of assembly. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the liquid heating device of this utility model;

[0022] Figure 2 This is a structural cross-sectional view of an embodiment of the liquid heating device of this utility model;

[0023] Figure 3 This is an exploded view of an embodiment of the liquid heating device of this utility model.

[0024] Figure 4 This is a structural anatomical view of an embodiment of the liquid heating device of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of an embodiment of the thermal insulation shell in this utility model.

[0026] Explanation of icon numbers:

[0027] label name label name label name 10 case 11 Inlet 12 water outlet 13 Heating chamber 20 Water inlet connector 30 Water outlet connector 40 Ceramic heater 50 Insulation shell 51 Entry 52 First via 53 Second via 54 First through slot 55 Second through slot 60 Electrical control box 41 First overflow port 42 Second overflow port 56 Installation port 70 thermal circuit breaker 14 Flip-edge 80 base

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This utility model proposes a liquid heating device, aiming to solve the technical problem of how to improve the assembly convenience and heat preservation effect of the liquid heating device.

[0033] In the embodiments of this utility model, such as Figures 1 to 5 As shown, the liquid heating device includes: a housing 10, which has an inlet 11, an outlet 12, and a heating chamber 13, the heating chamber 13 connecting the inlet 11 and the outlet 12; an inlet connector 20, which is connected to the outer wall of the housing 10 and connected to the inlet 11; an outlet connector 30, which is connected to the outer wall of the housing 10 and connected to the outlet 12; and a ceramic heater 40, which is installed in the housing. The heating chamber 13 is used to heat the liquid flowing through it; the insulation shell 50 is an integrally molded part, and one end of the insulation shell 50 has a sleeve inlet 51, through which the insulation shell 50 is fitted onto the shell 10; the insulation shell 50 has a first through hole 52 and a second through hole 53, the water inlet connector 20 extends out of the insulation shell 50 through the first through hole 52, and the water outlet connector 30 extends out of the insulation shell 50 through the second through hole 53.

[0034] In this embodiment, the integrally molded part refers to a complete shell structure manufactured through a single molding process, specifically injection molding or blow molding. This structure avoids the seams caused by splicing separate shells, reducing heat loss paths. The inlet 51 refers to the opening structure at the end of the insulation shell 50, specifically a circular or rectangular hole. This structure allows the insulation shell 50 to be directly fitted into the shell 10 in a single direction, simplifying the assembly process. The first through hole 52 and the second through hole 53 refer to through holes opened on the surface of the insulation shell 50, specifically implemented by stamping or drilling. This structure ensures a tight fit between the inlet connector 20 and the outlet connector 30 when they pass through the insulation shell 50, preventing heat leakage. The ceramic heater 40 installed in the heating chamber 13 refers to directly embedding the tubular ceramic heating element into the liquid flow channel, specifically using threaded connection or snap-fit ​​fixing. This structure ensures that the liquid flowing through the heating chamber 13 makes full contact with the heater surface, improving heat conduction efficiency.

[0035] The device adopts a nested structure of one-piece molded insulation shell 50 and shell 10. Through the matching design of inlet 51 and through hole, it can achieve rapid assembly while maintaining the integrity of insulation shell 50. It also reduces heat loss by reducing the number of seams. Combined with the built-in layout of ceramic heater 40, it forms a continuous heat blocking layer, which comprehensively improves the insulation performance and assembly efficiency of liquid heating device.

[0036] When the device is in operation, liquid enters through the inlet connector 20, flows into the heating chamber 13 through the inlet 11, is heated by the ceramic heater 40, and then flows out through the outlet 12 and the outlet connector 30. Throughout the process, the integrally molded insulation shell 50 wraps around the shell 10, forming a continuous insulation layer and reducing heat loss. The integral design of the insulation shell 50 eliminates the seams of traditional split structures, improving the insulation effect. The nested installation method simplifies the assembly process and improves production efficiency. The design of the first through hole 52 and the second through hole 53 ensures both the functionality of the inlet and outlet connectors and maintains the integrity of the insulation shell 50.

[0037] This embodiment employs a one-piece molded insulation shell 50 structure, eliminating the seams of traditional split shells, reducing heat loss paths, and improving insulation performance. The insulation shell 50 is directly fitted onto the outside of the shell 10 through the inlet 51, simplifying the assembly process and improving production efficiency. The first through hole 52 and the second through hole 53 on the insulation shell 50 precisely match the water inlet connector 20 and the water outlet connector 30, ensuring both pipeline connection functionality and maintaining the integrity of the insulation shell 50. The overall structural design achieves a dual improvement in ease of assembly and insulation performance, effectively enhancing the performance and user experience of the liquid heating device.

[0038] Specifically, such as Figures 2 to 5As shown, both the shell 10 and the insulation shell 50 are columnar in shape. The sleeve inlet 51 is opened at the bottom end of the insulation shell 50. The bottom end of the shell 10 is provided with a flange 14, which is connected to the periphery of the sleeve inlet 51.

[0039] The columnar design aligns the axes of the housing 10 and the insulation shell 50, facilitating axial alignment. The insertion port 51, located at the bottom of the insulation shell 50, allows direct insertion of the housing 10 from the bottom, simplifying the assembly process. The housing 10 and flange 14 can be made of stainless steel, while the insulation shell 50 can be made of plastic. After the housing 10 is inserted into the insulation shell 50 through the insertion port 51, the flange 14 contacts and positions itself against the lower end face of the insulation shell 50. The ceramic heater 40 can then be inserted into the housing 10 through the bottom opening. The flange of the ceramic heater 40 can be sealed to the housing 10 using a sealing ring. The liquid heating device also includes a base 80. The lower ends of the insulation shell 50, the housing 10, and the ceramic heater 40 are all mounted on the base 80. The insulation shell 50 and the base 80 are fixedly connected by fasteners. The bottom end of the insulation shell 50 presses the flange 14, the sealing ring, and the flange of the ceramic heater 40 into the base 80 to ensure the sealing effect of the sealing ring.

[0040] The shell 10 is connected to the periphery of the inlet 51 at the bottom of the insulation shell 50 via the bottom flange 14. The axial alignment characteristics of the columnar structure ensure that the two will not be radially offset during the fitting process. The connection between the flange 14 and the periphery of the inlet 51 forms an axial limit to prevent the shell 10 from moving up and down inside the insulation shell 50.

[0041] The design of the inlet 51 at the bottom allows the housing 10 to be inserted vertically from the bottom, avoiding the risk of misalignment caused by lateral assembly.

[0042] The above technical solution achieves a reliable connection and precise positioning between the shell 10 and the insulation shell 50. The columnar structure design allows the shell 10 and the insulation shell 50 to be aligned axially during installation, facilitating assembly. The connection between the bottom flange 14 and the periphery of the insertion port 51 prevents relative displacement between the shell 10 and the insulation shell 50 in the axial or radial direction, ensuring the overall structural strength. This connection method simplifies the assembly process, improves production efficiency, and enhances the durability and safety of the product.

[0043] For example, such as Figures 2 to 5As shown, the inlet 11 and the outlet 12 are located on the peripheral wall of the housing 10. The peripheral wall of the insulation shell 50 has a first through groove 54 and a second through groove 55 extending along the height direction. One end of the first through groove 54 passes through the first through hole 52, and the other end passes through the periphery of the sleeve inlet 51, so that the water inlet connector 20 can move from the bottom end of the insulation shell 50 along the first through groove 54 to the first through hole 52. One end of the second through groove 55 passes through the second through hole 53, and the other end passes through the periphery of the sleeve inlet 51, so that the water outlet connector 30 can move from the bottom end of the insulation shell 50 along the second through groove 55 to the second through hole 53.

[0044] The width of the through groove is set slightly larger than the outer diameter of the connector to ensure that the connector can slide freely along the through groove. When the insulation shell 50 is fitted from the bottom end of the shell 10, the inlet connector 20 and the outlet connector 30 are pre-positioned at the starting end of the through groove around the inlet 51. As the insulation shell 50 moves axially along the shell 10, the inlet connector 20 slides upward along the first through groove 54, and the outlet connector 30 moves synchronously along the second through groove 55. The straight extension path of the through groove constrains the movement direction of the connector to a single dimension, avoiding the risk of misalignment. During assembly, the inlet connector 20 can move from the bottom end of the insulation shell 50 along the first through groove 54 to the first through hole 52; the outlet connector 30 can move from the bottom end of the insulation shell 50 along the second through groove 55 to the second through hole 53. The design of the through groove provides a clear guiding path for the connector, enabling the connector to be accurately aligned and smoothly pass through the through hole.

[0045] The above technical solution provides a clear guiding path for the assembly of the inlet connector 20 and the outlet connector 30, simplifying the assembly process. The through-slot design ensures accurate alignment of the connectors, avoiding assembly difficulties caused by directly fixing the through-hole position. The through-slot design allows the connectors to move unimpeded, while limiting the direction of movement ensures the stability of the final position of the connectors. This structural design improves assembly efficiency, enhances sealing performance, and strengthens the overall structural reliability.

[0046] Specifically, such as Figures 2 to 5 As shown, the liquid heating device further includes a first heat insulation component and a second heat insulation component. The first heat insulation component is filled in the first through groove 54, and the second heat insulation component is filled in the second through groove 55. Both the first heat insulation component and the second heat insulation component are made of foamed material.

[0047] The foaming material is selected as closed-cell polyurethane foam or polyethylene foam. The foaming material is filled into the channel via injection molding or preforming. During filling, the material expands to cover all voids within the channel. After being injected into the channel in liquid form, the foaming material expands, completely occupying the internal space of the channel and forming a continuous, gapless insulation layer. Because the channel extends along its height and one end penetrates the perimeter of the inlet 51, the cured foaming material simultaneously seals the gap between the inlet 51 and the channel.

[0048] The above technical solution effectively solves the insulation performance defects caused by the through-slot structure. The insulation component filled with foam material blocks the path of heat loss through the through-slot, while simultaneously isolating the heating chamber 13 from external environmental interference. The low thermal conductivity and high sealing properties of the foam material prevent moisture or foreign objects from entering the device through the through-slot, improving heating efficiency and safety. The plasticity of the insulation component allows it to tightly conform to the irregular shape of the through-slot, ensuring structural stability and long-term insulation performance after filling. The lightweight and easy-to-process characteristics of the foam material ensure that the installation of the insulation component does not significantly increase the overall weight or complexity of the device, balancing production efficiency and cost control.

[0049] In practical applications, such as Figures 2 to 4 As shown, the water inlet 11 is located near the bottom of the housing 10, and the water outlet 12 is located near the top of the housing 10. The distance between the water inlet 11 and the bottom of the housing 10 can be set to 5%-15% of the total height of the housing 10, and the distance between the water outlet 12 and the top of the housing 10 can be set to 5%-15% of the total height of the housing 10.

[0050] After the liquid enters the heating chamber 13 through the inlet 11 near the bottom of the housing 10, the liquid level gradually rises. During this rise, the liquid continuously contacts the heating surface, and the heated liquid accumulates at the top of the housing 10, preferentially discharging through the outlet 12 near the top. A liquid level buffer zone with a height of 10-20 mm can be formed between the top of the housing 10 and the outlet 12. When the set target water temperature is high (e.g., 90℃ to 100℃), as the water temperature in the liquid level buffer zone rises, water vapor will be generated near the outlet 12. This water vapor can easily increase the pressure at the outlet 12, causing a jetting phenomenon. To prevent this jetting, a pressure relief valve is added to the outlet connector 30. When the pressure inside the outlet connector 30 reaches or exceeds the preset pressure value, the pressure relief valve opens to relieve pressure on the outlet connector 30, thereby preventing jetting and ensuring water safety.

[0051] The above technical solution achieves optimized liquid flow within the heating chamber 13. The liquid enters from the bottom and rises naturally, fully contacting the heater surface and reducing heating dead zones. Heated liquid preferentially exits from the top, preventing insufficiently heated liquid from flowing out prematurely. This layout shortens the liquid's residence time within the heating chamber 13, improving heating efficiency and uniformity. Simultaneously, the inlet and outlet positions make the overall structure more compact, facilitating connection to external pipelines and optimizing the device's space utilization.

[0052] For example, such as Figure 1 As shown, the liquid heating device also includes an electrical control box 60, which is located on one side of the insulation shell 50 and adjacent to the insulation shell 50. The second through groove 55 is formed on the peripheral wall of the insulation shell 50 facing the electrical control box 60, so that the electrical control box 60 can at least partially cover the second through groove 55.

[0053] The main control board is installed inside the electrical control box 60. The main control board is electrically connected to various electrical components of the liquid heating device, such as the ceramic heater 40, to receive detection signals from relevant sensors and control the operation of these components. The electrical control box 60 is located on the side of the insulation shell 50 and is adjacent to it. The thyristor on the main control board is cooled by a flow meter cover plate mounted on the insulation shell 50. The flow meter cover plate is made of metal (copper or stainless steel). Because it is in direct contact with the inlet water, the flow meter cover plate has a low temperature and is made of a material with good thermal and electrical conductivity, thus providing good heat dissipation for the thyristor. The flow meter cover plate also has a grounding hole to ground the inlet end, reducing the risk of leakage from the inlet water source.

[0054] The second through slot 55 is positioned within the peripheral wall region of the insulation shell 50 facing the electrical control box 60. The electrical control box 60 forms a physical barrier, shielding the slot structure of the second through slot 55. This arrangement allows the opening structure of the peripheral wall of the insulation shell 50 to be naturally concealed by adjacent functional components, maintaining the through slot assembly function while eliminating externally visible slot openings and preventing human hands from reaching into the second through slot 55 to contact the shell 10.

[0055] By adding an electrical control box 60 and arranging it logically, the second through slot 55 is effectively concealed, improving the device's overall appearance. Simultaneously, the concealing effect of the electrical control box 60 reduces heat loss and improves insulation. Furthermore, the presence of the electrical control box 60 reduces the risk of foreign objects entering the device through the second through slot 55, enhancing operational safety. The electrical control box is equipped with a cover, which encloses the main control board and connectors, effectively protecting them from water splashes.

[0056] For example, such as Figures 2 to 4As shown, the ceramic heater 40 is in the shape of a hollow tube. A first flow port 41 is provided at the lower end of the peripheral wall of the ceramic heater 40, and a second flow port 42 is provided at the top wall of the ceramic heater 40. Both the first flow port 41 and the second flow port 42 connect the heating chamber 13 to the tube cavity of the ceramic heater 40.

[0057] The hollow tubular structure allows liquid to flow simultaneously in the heating chamber 13 and the internal cavity of the ceramic heater 40. After entering the heating chamber 13, part of the liquid enters the internal cavity of the ceramic heater 40 through the first outlet 41, and the other part flows upward along the heating chamber 13. As water continues to flow in, the water level in the heating chamber 13 and the ceramic heater 40 rises simultaneously until the liquid surface covers the top of the ceramic heater 40. As the water level rises, the water temperature also gradually increases. When the water level rises to the outlet 12, the water temperature also reaches the preset temperature.

[0058] Through the above technical solution, since the liquid can flow simultaneously in the heating chamber 13 and the internal cavity of the ceramic heater 40, the contact area between the liquid and the heating surface is expanded, accelerating the heat transfer rate. Furthermore, this structure promotes uniform heating of the liquid, avoiding the formation of localized overheating or cold zones, thereby improving the accuracy of temperature control. Overall, this design optimizes the liquid flow path and heat exchange process, improving heating efficiency and temperature uniformity, effectively solving the problems of insufficient heat exchange efficiency and uneven heating. Because the temperature difference between the inside and outside of the ceramic heater 40 is small, the risk of the ceramic heater 40 cracking due to thermal stress caused by the temperature difference is also reduced.

[0059] Specifically, the housing 10 is made of stainless steel, such as food-grade stainless steel (SUS304L or SUS316L). The insulation shell 50 is made of plastic. The thickness of the stainless steel shell can be controlled within the range of 0.3 mm to 2 mm, for example, using SUS316L stainless steel, whose corrosion resistance meets the requirements for long-term contact with high-temperature liquids. The plastic shell can be made of polypropylene, polyphenylene sulfide, or glass fiber reinforced nylon material, and integrally molded by injection molding.

[0060] The high strength of the stainless steel shell can withstand the stress caused by pressure fluctuations in the liquid within the heating chamber 13, preventing deformation of the shell 10 that could lead to sealing failure. Its high-temperature resistance allows for long-term operation at temperatures between 80 and 100 degrees Celsius, and the surface passivation layer effectively resists chloride ion corrosion in water. The plastic shell, using low thermal conductivity materials, blocks heat transfer to the outside, and its enveloping structure reduces the surface temperature of the shell 10 to below 50 degrees Celsius, meeting safe contact requirements. During assembly, the elastic deformation capacity of the plastic shell allows the inlet 51 to fit over the stainless steel shell flange 14 with an interference fit, while the through-slot structure provides guiding space for joint movement, enabling rapid positioning and installation. The complementary rigidity design of the stainless steel and plastic shells ensures that the overall structure maintains deformation coordination when subjected to water flow impacts, preventing cracking at the joints due to differences in the thermal expansion coefficients of the materials.

[0061] In practical applications, such as Figure 1 and Figure 5 As shown, the heat insulation shell 50 has an installation port 56 on its peripheral wall. The liquid heating device also includes a thermal circuit breaker 70 installed at the installation port 56. The thermal circuit breaker 70 abuts against the shell 10. The thermal circuit breaker 70 is used to detect the temperature of the shell 10 and disconnect the power supply to the ceramic heater 40 when the temperature of the shell 10 reaches a preset temperature.

[0062] The thermal circuit breaker 70 can be installed using either a snap-fit ​​connection or a threaded connection. For example, an annular protrusion can be provided on the inner wall of the mounting port 56 to engage with the limiting groove of the thermal circuit breaker 70. A thermally conductive silicone layer, such as a sheet structure with a thickness of 0.5-1 mm, can be further provided on the contact surface between the thermal circuit breaker 70 and the housing 10 to improve temperature transfer efficiency. A protective cover made of plastic is designed on top of the thermal circuit breaker 70 to protect the terminals from water splashes. A reset hole is provided above the reset button of the thermal circuit breaker 70 for easy manual reset.

[0063] One end of the thermal circuit breaker is connected to one phase of the power input, and the other end is connected to one end of the ceramic heater 40; this is the first level of high-temperature physical protection for the heating device. The other end of the ceramic heater 40 is connected in series with a thermoplastic material and connected to the other phase of the power input. The thermoplastic material provides non-recoverable thermal protection, providing secondary high-temperature physical safety protection for the system. After the thermoplastic material's protection mechanism is triggered, the cause must be identified and eliminated before a new thermoplastic material can be replaced.

[0064] Through the above technical solution, this application solves the problem that the temperature of the housing 10 cannot be accurately monitored due to the enclosure of the insulation shell 50. The thermal circuit breaker 70 directly contacts the housing 10 through elastic contacts, eliminating the lag of traditional non-contact temperature measurement and controlling the temperature detection error within ±2℃. The embedded design of the mounting port 56 and the thermal circuit breaker 70 avoids the assembly complexity caused by disassembling the insulation shell 50 or its split structure, while maintaining the thermal insulation performance of the insulation shell 50 through the sealing ring. When the housing 10 is dry-burned or abnormally heated, the thermal circuit breaker 70 can complete the power-off action within 3 seconds, effectively preventing the risk of material deformation or insulation failure caused by overheating of the housing 10.

[0065] 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 water outlet connector 30 of the liquid heating device.

[0066] 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.

[0067] 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 upright ceramic heater 40, which is encased in a food-grade stainless steel tubing (SUS316L) housing 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 ceramic heater 40 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.

[0068] 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 housing has an inlet, an outlet and a heating chamber, and the heating chamber connects the inlet and the outlet. A water inlet connector is connected to the outer wall of the housing and communicates with the water inlet. A water outlet connector is connected to the outer wall of the housing and communicates with the water outlet. A ceramic heater, which is installed inside the heating chamber to heat the liquid flowing through the heating chamber; The insulation shell is an integrally molded part, and one end of the insulation shell has a sleeve inlet, through which the insulation shell is sleeved onto the shell. The insulation shell has a first through hole and a second through hole. The water inlet connector extends out of the insulation shell through the first through hole, and the water outlet connector extends out of the insulation shell through the second through hole.

2. The liquid heating device as described in claim 1, characterized in that, Both the shell and the insulation shell are columnar in shape. The inlet is located at the bottom of the insulation shell, and the bottom of the shell is provided with a flange that is connected to the periphery of the inlet.

3. The liquid heating device as described in claim 2, characterized in that, The inlet and outlet are located on the peripheral wall of the housing. The peripheral wall of the insulation housing has a first through groove and a second through groove extending along the height direction. One end of the first through groove passes through the first through hole, and the other end passes through the periphery of the sleeve inlet, so that the water inlet connector can move from the bottom end of the insulation housing along the first through groove to the first through hole. One end of the second through groove passes through the second through hole, and the other end passes through the periphery of the sleeve inlet, so that the water outlet connector can move from the bottom end of the insulation housing along the second through groove to the second through hole.

4. The liquid heating device as described in claim 3, characterized in that, The liquid heating device further includes a first heat insulation component and a second heat insulation component. The first heat insulation component is filled in the first through groove, and the second heat insulation component is filled in the second through groove. Both the first heat insulation component and the second heat insulation component are made of foamed material.

5. The liquid heating device as described in claim 3, characterized in that, The water inlet is located near the bottom of the housing, and the water outlet is located near the top of the housing.

6. The liquid heating device as described in claim 5, characterized in that, The liquid heating device also includes an electrical control box, which is located on one side of the insulation shell and adjacent to the insulation shell. The second through slot is formed on the peripheral wall of the insulation shell facing the electrical control box, so that the electrical control box can at least partially cover the second through slot.

7. The liquid heating device as described in claim 5, characterized in that, The ceramic heater is in the shape of a hollow tube. A first flow port is provided at the lower end of the peripheral wall of the ceramic heater, and a second flow port is provided at the top wall of the ceramic heater. Both the first flow port and the second flow port connect the heating chamber to the tube cavity of the ceramic heater.

8. The liquid heating device as described in claim 1, characterized in that, The housing is made of stainless steel, and the insulation can be made of plastic.

9. The liquid heating device as described in claim 2, characterized in that, The insulation shell has an installation port on its peripheral wall. The liquid heating device also includes a thermal circuit breaker installed at the installation port. The thermal circuit breaker abuts against the shell and is used to detect the temperature of the shell and disconnect the power supply to the ceramic heater when the temperature of the shell reaches a preset temperature.

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 water outlet connector of the liquid heating device.

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