Liquid heating container

Abstract

The utility model discloses a liquid heating container, which comprises an insulating container made of glass or ceramic; the at least one first heating film covers at least part of the outer bottom wall of the insulating container; and / or; the at least one second heating film covers at least part of the outer side wall of the insulating container; the first heating film and the second heating film are tin dioxide semiconductor films. The problems that an existing liquid heating container is low in heat efficiency, local overheating exists, heating uniformity is not good enough, and the risk of secondary pollution of drinking water is caused are solved. The effects of energy saving, time saving, safety, health, integrated structure innovation and trustworthiness are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid heating technology, and more specifically, relates to a liquid heating container. Background Technology

[0002] With the advancement of technology, the variety of household appliances has increased, and their applications have become more widespread. Liquid heating containers such as electric kettles and health-preserving kettles are widely used in people's daily lives, improving their quality of life. However, because electric kettles and similar products are relatively large, they can be inconvenient when the demand for hot water is not high. To address this issue, smaller electric kettles have emerged on the market. Taking electric kettles as an example, they have become a commonly used water heating container in recent years. Due to their compact size, ease of use, and portability, they have become a frequently used household appliance when people are out and about or traveling.

[0003] However, existing electric kettles and water heaters typically use stainless steel containers as heat conductors, with heating wires or conductive thick films installed at the bottom of the stainless steel container. For electrical safety, both of these heating devices must use an insulator as a medium to heat the stainless steel container, resulting in low electrothermal efficiency. Furthermore, during the heating process, the stainless steel container comes into direct contact with water, which can easily lead to the release of harmful substances such as rust or the formation of scale.

[0004] To address the problems associated with stainless steel containers, electric kettles and pots with insulated containers and separate stainless steel heating plates have emerged on the market. However, because the kettle body and the electric heating plate are separate, heating can only be achieved from the bottom of the container, resulting in issues such as a longer heat transfer path, reduced heat utilization efficiency, localized overheating affecting lifespan, and poor heating uniformity. Utility Model Content

[0005] To address the problems of low heat utilization efficiency, localized overheating, poor heating uniformity, and the risk of secondary pollution of drinking water in existing liquid heating containers, the purpose of this utility model is to provide a liquid heating container, which includes: an insulating container made of glass or ceramic; at least one first heating film covering at least a portion of the outer bottom wall of the insulating container; and / or: at least one second heating film covering at least a portion of the outer side wall of the insulating container; wherein both the first heating film and the second heating film are tin dioxide semiconductor thin films.

[0006] Furthermore, the outer bottom wall and outer side wall of the insulating container are provided with heating films, and the second heating film is connected in parallel with the first heating film.

[0007] Furthermore, the first heating film is a square heating film, with two electrodes located at both ends of the square heating film.

[0008] Furthermore, a second heating film is provided on the outer wall of the insulating container, and the second heating film is a non-closed heating film; or, a plurality of second heating films are spaced apart on the outer wall of the insulating container, and the plurality of second heating films are evenly distributed on the outer wall of the insulating container.

[0009] Furthermore, the liquid heating container also includes: a container lid, which is openably disposed at the container opening of the insulated container; the container lid is provided with a temperature sensor and a temperature display.

[0010] Furthermore, the liquid heating container also includes: a controller; a power socket electrically connected to the controller; a temperature detection unit electrically connected to the controller; a temperature adjustment unit electrically connected to the controller for adjusting the heating temperature of the first heating film and the second heating film; and a liquid level detection unit electrically connected to the controller.

[0011] Furthermore, the liquid heating container has a double-wall structure, and the liquid heating container further includes: an outer wall disposed on at least a portion of the outer side of the insulating container; wherein, the space between the outer wall and the insulating container is a hollow insulation layer or a vacuum insulation layer.

[0012] Furthermore, the liquid heating container has a double-layered glass structure, and the outer wall is provided with liquid level scale lines along its height direction.

[0013] Furthermore, the liquid heating container has a single-wall structure, and the liquid heating container also includes an outer jacket disposed on the outside of the liquid heating container.

[0014] Furthermore, the insulating container is made of glass, and the outer casing has a viewing window along its height; and / or, the insulating container has liquid level markings.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Energy saving and high heat utilization rate. ① The tin dioxide semiconductor film is less than 200 nanometers thick (less than 0.02 millimeters), thin enough to have a light transmittance of over 85%. The presence of the film is virtually imperceptible to the touch on the substrate surface before and after its formation, resulting in a near-two-dimensional structure. It has a small inherent heat capacity, leading to minimal heat loss. ② Large area and simple structure. Sheet-based heating and heat transfer result in a large area and fast heat transfer, eliminating the need for additional heat transfer and heat dissipation structures. The insulating substrate and semiconductor electrothermal film are integrally formed, eliminating the need for additional insulation structures. Compared to any other existing resistive electrothermal technology, it has fewer heat transfer and heat dissipation transition links, shorter paths, and a simpler structure. Therefore, heat loss is low and heat utilization rate is high.

[0017] 2. Time-saving: Due to its high heat utilization rate, it heats liquids the fastest with the same power consumption. Because it can conduct heat transfer in a three-dimensional manner from the bottom and sides, overcoming the limitations of bottom planar heating, it can withstand greater heating power, resulting in faster and more time-saving liquid heating.

[0018] 3. Safety. The container is made of glass or ceramic, eliminating the potential risks of secondary contamination such as heavy metal leaching, rust formation, glue residue, and aging seals, as well as the risk of leakage. The heated liquid is safe for drinking.

[0019] 4. The double-walled structure design of the container integrates electric heating and thermal insulation for glass and ceramic containers. This results in less heat loss during the heating process, saving energy and time, and opening up a new category of structural design.

[0020] 5. Peace of mind and visibility. If a glass container is used, the water level and water quality are clearly visible, and the entire heating process is visible.

[0021] 6. Insulating containers made of glass or ceramic possess excellent thermal and chemical stability. Compared to stainless steel containers, glass and ceramic containers are primarily composed of inorganic non-metallic materials with good molecular structure stability. They do not contain heavy metals and will not leach heavy metals or other harmful substances when boiling water at high temperatures. They maintain their structural integrity in acidic, alkaline, and saline environments, are corrosion-resistant, and will not leach heavy metals due to corrosion. Therefore, they pose no potential threat to human health, allowing users to cook and eat with peace of mind.

[0022] 7. By setting a tin dioxide semiconductor thin film on the outer bottom and outer walls of the insulating container, the heat transfer area is expanded compared to heating via a bottom heating tube. With the same input power, this reduces the power density of the heating film, preventing localized overheating at the bottom of the container, extending the lifespan of the liquid heating container, and ensuring electrical safety. Furthermore, it increases output power, resulting in faster water heating. Compared to heating with conductive thick films such as graphene heating films, the tin dioxide semiconductor thin film is thinner, provides more uniform heating, and avoids the cracking problems associated with conductive thick films like graphene heating films. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a liquid heating container provided by this utility model;

[0024] Figure 2 yes Figure 1 Exploded view of a liquid heating container;

[0025] Figure 3 This is a schematic diagram of a liquid heating container with a single-wall structure;

[0026] Figure 4 yes Figure 3Enlarged view of point A in the middle;

[0027] Figure 5 This is a schematic diagram of a liquid heating container with a double-walled structure.

[0028] Figure 6 This is a schematic diagram of another type of liquid heating container with a double-wall structure;

[0029] Figure 7 This is a schematic diagram of the electrical control components of a liquid heating container.

[0030] In the diagram: 100, liquid heating container; 11, insulating container; 12, outer wall; 13, vacuum insulation layer; 21, first heating film; 22, second heating film; 30, bottom mounting plate; 31, controller; 32, temperature detection unit; 33, temperature regulation unit; 34, power socket. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0032] See Figure 1 This is a structural schematic diagram of a liquid heating container 100 provided by this utility model. Combined with... Figures 1 to 7 The liquid heating container 100 includes, for example, an insulating container 11, a first heating film 21, and / or a second heating film 22. The insulating container 11 is made of a high-temperature resistant insulating material such as glass or ceramic. At least one first heating film 21 covers at least a portion of the outer bottom wall of the insulating container 11; at least one second heating film 22 covers at least a portion of the outer side wall of the insulating container 11. For example, the first heating film 21 may completely cover the outer bottom wall of the insulating container 11, or it may partially cover the outer bottom wall of the insulating container 11. The second heating film 22 is located below the safe water level line when the liquid heating container 100 is normally heating water. For example, the first heating film 21 may be provided solely on the outer bottom wall of the insulating container 11, or the second heating film 22 may be provided solely on the outer side wall of the insulating container 11, or both the second heating film 22 and the first heating film 21 may be provided together and used in parallel. The area and arrangement of the first heating film 21 and the second heating film 22 can be adjusted according to actual needs, combined with heating effect and production cost.

[0033] It should be noted that the insulating container 11 made of glass or ceramic possesses excellent thermal and chemical stability. Compared to stainless steel containers, glass and ceramic containers are primarily composed of inorganic non-metallic materials, exhibiting good molecular structural stability, containing no heavy metals, and will not leach heavy metals or other harmful substances when boiling water at high temperatures. They maintain structural integrity in acidic, alkaline, and saline environments, are corrosion-resistant, and will not leach heavy metals due to corrosion. Therefore, they pose no potential threat to human health, allowing users to cook and eat with peace of mind. In one specific embodiment, the insulating container 11 is made of quartz glass.

[0034] By installing heating films on the bottom and outer walls of the insulating container 11, the heat transfer area is expanded compared to heating via a bottom heating pipe. With the same input power, this reduces the power density of the heating film, preventing localized overheating at the bottom of the container, extending the lifespan of the liquid heating container 100, and ensuring electrical safety. Furthermore, it increases the output power, resulting in faster water heating.

[0035] It should be noted that both the first heating film 21 and the second heating film 22 are tin dioxide semiconductor films formed on the outer bottom and outer walls of the insulating container 11 using coating processes such as chemical vapor deposition, spray pyrolysis, ion sputtering, and high-temperature evaporation. Tin dioxide semiconductor films possess excellent physicochemical properties, including high hardness, high light transmittance, high conductivity, high temperature resistance, and good thermal stability. The regions where tin dioxide metal oxide grains are formed are modified into semiconductor materials, exhibiting electrothermal and electromagnetic properties; the regions where tin dioxide metal oxide grains are not formed remain insulators, forming a new material that integrates insulator and semiconductor.

[0036] Furthermore, the first heating film 21 is a square heating film, with two electrodes located at both ends of the square heating film. For example, silver paste electrodes are coated on a tin dioxide film, and copper sheet electrodes can be attached or soldered onto the silver paste electrodes. The heating film is powered and transmits signals through wiring via the silver paste electrodes or copper sheet electrodes. By setting the bottom electrothermal film layer to a square shape, current can flow from one end of the square heating film to the other, resulting in more stable heating and a better and more uniform heating effect.

[0037] In one specific embodiment, a second heating film 22 is provided on the outer wall of the insulating container 11, and the second heating film 22 is a non-closed heating film, with two electrodes located at both ends of the non-closed heating film. For example, the bottom of the insulating container 11 is circular, and the second heating film 22 on the outer wall of the insulating container 11 is a non-closed C-shape, rather than a closed ring.

[0038] In one specific embodiment, a plurality of second heating films 22 are provided on the outer side wall of the insulating container 11, and the plurality of second heating films 22 are evenly distributed on the outer side wall of the insulating container 11. The plurality of second heating films 22 may be arranged at intervals along the height direction of the outer side wall of the insulating container 11, or they may be arranged at intervals along the periphery of the outer side wall of the insulating container 11.

[0039] The number and placement of the silver paste electrodes determine the number of second heating films 22. For example, two parallel silver paste electrodes, insulated from each other, form a resistor, which is one second heating film 22; two opposing silver paste electrodes form two parallel resistors, which are two second heating films 22; three or more spaced silver paste electrodes form multiple parallel resistors, which are multiple second heating films 22, the same number as the number of electrodes. The number of silver paste electrodes can be set according to production costs and applicability.

[0040] Furthermore, the liquid heating container 100 also includes a container lid, which is openably disposed at the opening of the insulating container 11. For example, the liquid heating container 100 can be a heating cup or a heating kettle; the opening of the insulating container 11 can be a flat opening or a screw-in opening. Preferably, the container lid is provided with a temperature sensor and a temperature display, allowing the user to visually view the liquid temperature inside the liquid heating container 100 through the temperature display on the container lid. For example, the container lid has a built-in button battery, and the temperature sensor can monitor the steam temperature and display it on the lid via the temperature display.

[0041] Furthermore, the liquid heating container 100 also includes: a controller 31, a temperature detection unit 32, a temperature regulation unit 33, and a power socket 34. The power socket 34 is electrically connected to the controller 31, and an external power cord supplies power to the controller 31, the temperature detection unit 32, and the temperature regulation unit 33 through the power socket 34. The temperature detection unit 32, the temperature regulation unit 33, the first heating film 21, and the second heating film 22 are all electrically connected to the controller 31. The user can set the heating temperature or heating level through the temperature regulation unit 33. The controller 31 can receive signals from the temperature regulation unit 33 and the temperature detection unit 32 to control the heating temperature and power supply of the first heating film 21 and the second heating film 22. For example, the temperature detection unit 32 is an NTC temperature sensor, and the temperature regulation unit 33 is equipped with a temperature level adjustment component, which is a capacitive button. The user can set and adjust different heating temperatures by pressing the capacitive button.

[0042] In one specific embodiment, a bottom mounting plate 30 is provided below the liquid heating container 100. The controller 31 is installed on the side of the bottom mounting plate 30 away from the insulating container 11. The NTC temperature sensor, the temperature adjustment unit 33, and the power socket 34 are all installed on the controller 31. The NTC temperature sensor passes through the bottom mounting plate 30 and contacts the bottom of the insulating container 11. When the set heating temperature is reached, the temperature adjustment unit 33 automatically cuts off the power. When the temperature is detected to be lower than the set heat preservation temperature, the power is automatically turned on to heat, realizing the functions of heat preservation and automatic power off.

[0043] For example, the temperature regulating unit 33 contains two types of bimetallic strips with different coefficients of thermal expansion, which bend to different degrees when heated. When the temperature reaches the upper limit of the set value, the bimetallic strip bends more and disconnects the power supply; when the temperature reaches the lower limit of the set value, the bimetallic strip returns to its original shape, and the circuit is closed.

[0044] For example, the liquid heating container 100 also has a tilt switch to enable automatic power-off. For example, the liquid heating container 100 also has a liquid level detection unit, which is electrically connected to the controller 31. When the liquid level in the insulating container 11 is lower than the minimum water level line, the power supply cannot be connected or the power supply is automatically cut off to prevent electrical safety risks caused by dry burning or partial dry burning.

[0045] Furthermore, the liquid heating container 100 has a double-walled structure, and further includes an outer wall 12 disposed on at least a portion of the outer side of the insulating container 11; wherein, a vacuum insulation layer 13 is located between the outer wall 12 and the insulating container 11, which serves both to provide insulation and to improve structural strength, eliminating the need for an outer casing. Alternatively, a hollow insulation layer can be located between the outer wall 12 and the insulating container 11, and whether or not the insulation layer is evacuated can be determined according to actual needs. The height of the vacuum insulation layer 13 or the hollow insulation layer can be adjusted as needed. The outer wall 12 can completely or partially cover the insulating container 11; no limitation is made here.

[0046] For example, a double-walled structure can be a double-layered ceramic structure or a double-layered glass structure.

[0047] Preferably, the liquid heating container 100 has a double-layered glass structure. The glass material is clean and transparent, providing good visibility, and the outer wall 12 is printed with liquid level markings. Users can intuitively see the remaining water level in the container.

[0048] In one specific embodiment, the liquid heating container 100 has a single-wall structure, and further includes an outer jacket disposed on the outside of the liquid heating container 100; for example, the outer jacket can be a high-temperature resistant plastic jacket or a double-layer stainless steel vacuum jacket. The single-wall structure can be made of glass or ceramic material, and there is no limitation here.

[0049] Preferably, the insulating container 11 is made of glass, and the outer casing has a viewing window along its height direction. The insulating container 11 is provided with liquid level scale lines, and the user can intuitively see the water level inside the insulating container 11 according to the viewing window and the liquid level scale lines.

[0050] In one specific embodiment, the liquid heating container 100 is a heating cup. The opening of the insulating container 11 can be a flat opening or a flat opening with an external threaded opening. The shape of the insulating container 11 can be a cylindrical straight cylinder, or a straight cylinder with a domed contraction and a threaded opening at the top. For example, the cylindrical shape can be round or square; a filter device can also be installed on the top of the insulating container 11 for holding tea leaves, flower tea, etc.

[0051] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A liquid heating vessel characterised in that, The liquid heating container includes: Insulating container, made of glass or ceramic; At least one first heating film covers at least a portion of the outer bottom wall of the insulating container; and / or At least one second heating film covers at least a portion of the outer wall of the insulating container; Both the first heating film and the second heating film are tin dioxide semiconductor thin films.

2. The liquid heating vessel of claim 1, wherein, The insulating container is provided with heating films on its bottom and outer sides, and the second heating film is connected in parallel with the first heating film.

3. The liquid heating vessel of claim 1, wherein, The first heating film is a square heating film, with two electrodes located at both ends of the square heating film.

4. The liquid heating vessel of claim 1, wherein, The insulating container has a second heating film on its outer wall, which is a non-closed heating film; or, the insulating container has multiple second heating films spaced apart on its outer wall, which are evenly distributed on the outer wall of the insulating container.

5. The liquid heating vessel of claim 1, wherein, Also includes: A container lid is detachably disposed at the opening of the insulated container; a temperature sensor and a temperature display are disposed on the container lid.

6. The liquid heating vessel of claim 1, wherein, Also includes: Controller; A power connector is electrically connected to the controller. The temperature detection unit is electrically connected to the controller; A temperature regulating unit, electrically connected to the controller, is used to regulate the heating temperature of the first heating film and the second heating film; The liquid level detection unit is electrically connected to the controller.

7. The liquid heating vessel according to any one of claims 1-6, wherein, The liquid heating container has a double-walled structure, and the liquid heating container further includes: The outer wall is disposed on at least a portion of the outside of the insulating container; The space between the outer wall and the insulating container is a hollow insulation layer or a vacuum insulation layer.

8. The liquid heating vessel of claim 7, wherein, The liquid heating container has a double-layered glass structure, and the outer wall is provided with liquid level scale lines along its height direction.

9. The liquid heating vessel according to any one of claims 1-6, wherein, The liquid heating container has a single-wall structure, and the liquid heating container further includes: An outer casing is provided on the outside of the liquid heating container.

10. The liquid heating vessel of claim 9, wherein, The insulating container is made of glass, and the outer casing has a viewing window along its height; and / or, the insulating container has liquid level markings.

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