Liquid heating device

Abstract

The utility model provides a liquid heating device which comprises a container body used for containing liquid; the heating assembly is a flexible part and is laid on the outer surface of the container body, the heating assembly comprises a heating film and a reflecting layer which are arranged in an overlapped mode, and the reflecting layer is laid on the surface of the side, away from the container body, of the heating film. According to the scheme, the reflecting layer is laid on the surface of the side, away from the container body, of the heating film to form the heating assembly, heat radiation generated by the heating film can be fully reflected, heat radiation loss is reduced, and the heating efficiency of the heating assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen utensils, and particularly relates to a liquid heating device. Background Art

[0002] Electric kettles are widely used in people's daily lives. Existing electric kettles usually adopt the method of arranging an electric heating tube at the bottom of the kettle to achieve heating. However, the electric heating tube has the defect of poor heating uniformity. On the one hand, this easily causes calcium and magnesium plasma in the kettle to crystallize and precipitate in the high-temperature heating area, sticking to the bottom of the kettle, resulting in easy caking of the pot and difficult cleaning. On the other hand, violent water molecule movement will occur in the area where the bottom of the kettle contacts the electric heating tube, and the high-speed and violent tearing movement will cause great noise. In addition, due to the small contact area between the electric heating tube and the kettle body, there is also the problem of low heating efficiency. Summary of the Utility Model

[0003] Therefore, the purpose of the present utility model is to provide a liquid heating device to at least solve the problems of uneven heating, high noise, and low heating efficiency.

[0004] According to one aspect of the present utility model, there is provided a liquid heating device, which includes: a container body for containing liquid; and a heating assembly, the heating assembly being a flexible member and laid on the outer surface of the container body, the heating assembly including an overlapping heating film and a reflective layer, wherein the reflective layer is laid on one surface of the heating film facing away from the container body.

[0005] The liquid heating device provided by the embodiment of the present utility model, by adopting a flexible heating assembly, can fit the outer surface of the container body, achieve surface heating, improve heating uniformity, reduce caking of the pot and the cleaning difficulty, and reduce the local noise source formed by uneven heating of water molecules, and can fully reduce noise. At the same time, the flexible member has high adaptability to different installation positions, unlike the traditional electric heating tube which can only be limited to the bottom of the kettle body. By laying the flexible heating assembly on the outer surface of the container body, the contact area between the heating assembly and the container body can be increased, thereby significantly increasing the speed of heating the liquid and improving the heating efficiency. In addition, the heating assembly specifically includes an overlapping heating film and a reflective layer, and both the heating film and the reflective layer are flexible members. By laying the reflective layer on one surface of the heating film facing away from the container body to form the heating assembly, the heat radiation generated by the heating film can be fully reflected, reducing the loss of heat radiation and improving the heating efficiency of the heating assembly.

[0006] In some embodiments, the heating assembly further includes a heat insulation member, wherein the heat insulation member and the reflective layer are constructed as an integral structure; or the heat insulation member is constructed as a heat insulation layer, and the heat insulation layer is overlapped on one surface of the reflective layer facing away from the heating film.

[0007] In these embodiments, by further adding a heat-insulating member to the heating component, the cooling effect caused by heat conduction and heat convection in the external low-temperature environment can be reduced, thereby reducing the negative impact on the working efficiency of the heating component. In terms of implementing the heat-insulating member, the heat-insulating member and the reflective layer can be constructed as an integral structure, that is, the reflective material and the heat-insulating material are constructed as an integral structure, so that the integral structure has both heat-insulating and reflective functions. Alternatively, the heat-insulating member can be constructed as an independent heat-insulating layer, thus forming a three-layer structure of the heat-insulating layer, the reflective layer, and the heating film. For the case where the heat-insulating member is constructed as a heat-insulating layer, by arranging the heat-insulating layer outside the reflective layer and the heating film instead of between the reflective layer and the heating film, the risk of the heat-insulating layer absorbing too much heat and causing danger can be avoided, ensuring the use safety of the product.

[0008] In some embodiments, when the power density of the heating film exceeds a preset value, a heat-insulating member is provided in the heating component.

[0009] In these embodiments, by specifically limiting the setting of the heat-insulating member only when the power density of the heating film is relatively high, the heat-insulating member can be set when there is a risk of the heating film being cooled by the external environment due to its working temperature being significantly higher than the external environment temperature, which can simplify the structure of the heating component as much as possible, contribute to reasonable cost control, and simplify production.

[0010] In some embodiments, the heating film is provided on the outer surface of the container body in at least one of the following ways: pasting, warm pressing and pre-tightening, spraying.

[0011] In these embodiments, by adopting at least one of the above methods, the heating film can be set on the outer surface of the container body more reliably, realizing the close contact between the heating film and the container body, which helps to ensure the working reliability of the heating film.

[0012] In some embodiments, the reflective layer is provided on the surface of the heating film facing away from the container body in at least one of the following ways: bonding, hot pressing and pre-tightening, electric welding.

[0013] In these embodiments, by adopting at least one of the above methods, a reflective layer can be more tightly wrapped around the outer surface of the heating film facing away from the container body as a whole, making the two basically integrated, reducing the risk of the reflective layer falling off during work, and thus being able to effectively reflect the heat radiated outward by the heating film, improving the heating efficiency of the heating component.

[0014] In some embodiments, the heating component is laid on the outer side surface of the container body; or the heating component is laid on the outer side surface and the outer bottom surface of the container body.

[0015] In these embodiments, compared with a conventional bottom-heated liquid heating device, by laying the heating component on the outer side surface of the container body, uniform side heating can be achieved, the boiling noise during liquid heating can be reduced, and the heating speed of the liquid can be significantly increased. By further extending the heating component to the outer bottom surface of the container body, the contact area between the heating component and the container body can be increased, which helps to improve the overall heating power and heating speed, and enhances the flexibility of the heating component setting scheme.

[0016] In some embodiments, the number of heating components is one; or the number of heating components is at least two, and the heating components are distributed along the height direction of the container body.

[0017] In these embodiments, the heating component can be set as a whole, which can reduce the use cost of the heating component and simplify the control of the heating component. The number of heating components does not have to be limited to one, so that the heating scheme can be flexibly adjusted. Specifically, by arranging a plurality of heating components along the height direction of the container body, zone heating and control at different heights can be achieved. For example, according to the liquid level of the liquid contained in the container body, the heating components below the liquid level are controlled to start to heat the liquid, which can not only achieve efficient heating, but also reduce the dry burning of the heating components in the area not covered by the liquid, helping to extend the service life of the liquid heating device.

[0018] In some embodiments, when the number of heating components is at least two, the heating components are connected in parallel.

[0019] In these embodiments, by connecting a plurality of heating components in parallel, independent control of each heating component can be achieved, which helps to improve the flexibility and convenience of control. At the same time, when a local heating component is damaged, the other heating components can still operate without being affected, thus ensuring the working reliability of the plurality of heating components as a whole.

[0020] In some embodiments, when the number of heating components is one, the liquid heating device according to the embodiments of the present invention further includes: a temperature sensor located at the top of the heating component; and a controller connected to the temperature sensor and the heating component for controlling the start and stop of the heating component according to the detection signal of the temperature sensor.

[0021] In these embodiments, it is found through observation and analysis that when the heating component is laid on the outer side of the container body, the container body and the liquid inside it are often heated up first in the upper part and then in the lower part, so that the upper temperature is higher than the lower temperature. In the case where the heating component is further laid on the outer bottom surface of the container body, the coverage of the heating component is large, and it is not convenient to set the temperature sensor. Based on this, by setting the temperature sensor on the top of the heating component, the temperature change of the heating component caused by the heating liquid can be quickly captured without hindering the operation of the heating component, and the heating situation of this part can be reflected, thereby improving the sensitivity of temperature detection and the response rate and reliability of the controller. In addition, when there is liquid near the height corresponding to the temperature sensor in the container body, that is, when the liquid level in the container body submerges the heating component, the heat generated by the heating component can be quickly absorbed by the liquid, so that the temperature of the heating component is significantly reduced, that is, the detection value of the temperature sensor is significantly reduced or lower than a certain threshold. On the contrary, if there is no liquid here, the heating component will heat up rapidly due to dry burning, and the less liquid in the container body, the less heat generated by the heating component is absorbed, and the heating component at the location where the temperature sensor is set will be more intense. Based on this, the controller can analyze the detection value of the temperature sensor to roughly determine the liquid level in the container, which helps to control the heating component in combination with the liquid level. Specifically, the heating component will only be heated when the liquid level submerges the heating component. This can effectively reduce the risk of dry burning of the heating component, extend the service life of the heating component, ensure the safe operation of the liquid heating device, and help improve the heating control effect.

[0022] In some embodiments, when the number of heating components is at least two, the liquid heating device according to the embodiment of the utility model also includes: a temperature sensor, in the outer side area of the container body, the number of temperature sensors is consistent with the number of heating components, and a temperature sensor is arranged on the top of each heating component; a controller, connected to the temperature sensor and the heating component, and used to control the start and stop of the heating component according to the detection signal of the temperature sensor.

[0023] In these embodiments, in the case of setting multiple heating components, in addition to the advantages of setting the temperature sensors and controllers mentioned above, by setting the temperature sensors in the outer side area of the container body according to the number of heating components, the heating conditions of each heating component on the side can be fully understood, and the controller can then perform targeted control on the start and stop of each heating component, which helps to improve the accuracy of control and enhance the heating effect.

[0024] In some embodiments, no matter how many heating components there are, for the corresponding temperature sensors and heating components, the spacing between the temperature sensors and the corresponding heating components and the outer surface of the container body is less than 3 mm, so that relatively close contact can be achieved.

[0025] In these embodiments, during the heating process of the heating component, heat is specifically transferred to the container body and then to the liquid contained therein via the container body. Therefore, at local positions, the temperatures of the heating component, the container body, and the liquid are approximately equal. By making the temperature sensor closely contact both the heating component and the outer surface of the container body, the contact area for temperature measurement can be increased, and thus a more accurate local temperature can be detected, which helps to improve the control accuracy and the heating effect.

[0026] Some aspects and / or advantages of the general concept of the present invention will be described partially in the following description, and some will be clear from the description, or can be learned through the implementation of the general concept of the present invention. Brief Description of the Drawings

[0027] Through the following description of the embodiments in conjunction with the drawings, the above and other objects and features of the present invention will become clearer. In the drawings:

[0028] Figure 1 is a partial schematic view of a liquid heating device according to an embodiment of the present invention;

[0029] Figure 2 is a partial schematic view of a liquid heating device according to another embodiment of the present invention;

[0030] Figure 3 is a longitudinal sectional view of a liquid heating device according to an embodiment of the present invention;

[0031] Figure 4 is according to an embodiment of the present invention Figure 3 partial enlarged view at part J;

[0032] Figure 5 is a longitudinal sectional view of a liquid heating device according to another embodiment of the present invention;

[0033] Figure 6 is according to an embodiment of the present invention Figure 5 partial enlarged view at part K;

[0034] Figure 7 is a longitudinal sectional view of a liquid heating device according to another embodiment of the present invention;

[0035] Figure 8 is according to an embodiment of the present invention Figure 7 partial enlarged view at part L.

[0036] Figures 1 to 8 Explanation of Reference Numerals in the Drawings:

[0037] 10: Container body;

[0038] 20: Heating component; 21: Heating film; 211: Heating body; 212: Heat-conducting insulating member; 212a: First heat-conducting insulating layer; 212b: Second heat-conducting insulating layer; 22: Reflective layer; 23: Heat-insulating layer; 24: Live wire; 25: Neutral wire; 26: Signal wire;

[0039] 30: Housing;

[0040] 40: Handle;

[0041] 50: Cover body;

[0042] 60: Power connection terminal;

[0043] 70: Temperature sensor;

[0044] 80: Controller. Detailed implementation manners

[0045] The following detailed implementation manners are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be changed as will be apparent after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0046] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. On the contrary, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, devices, and / or systems described herein, which will be apparent after understanding the disclosure of the present application.

[0047] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more of them.

[0048] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts should not be limited by these terms. Instead, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, a first component, first element, first region, first layer, or first part as referred to in the examples described herein may also be referred to as a second component, second element, second region, second layer, or second part without departing from the teachings of the examples.

[0049] In the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" or "coupled to" another element, the element may be directly "on" the other element, directly "connected to" or "coupled to" the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly on" another element, "directly connected to" or "directly coupled to" another element, there may be no other elements intervening therebetween.

[0050] The terms used herein are only for describing various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including", and "having" specify the presence of the recited features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs after understanding this utility model. Unless explicitly defined as such herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this utility model, and should not be interpreted in an idealized or overly formalized manner.

[0052] Furthermore, in the description of the examples, when a detailed description of a related structure or function that is considered well-known would cause an ambiguous interpretation of this utility model, such detailed description will be omitted.

[0053] Next, in combination with Figures 1 to 8 the liquid heating device provided by the embodiments of this utility model will be introduced.

[0054] Embodiments of one aspect of this utility model provide a liquid heating device, such as an electric kettle, a health kettle, and other devices. As Figure 1As shown in the figure, the liquid heating device includes a container body 10 and a heating component 20. The container body 10 is used to hold liquid; the heating component 20 is a flexible member and is laid on the outer surface of the container body 10. The heating component 20 includes a heating film 21 and a reflective layer 22 which are overlapped. Among them, the reflective layer 22 is attached to the surface of the heating film 21 facing away from the container body 10.

[0055] In the liquid heating device provided by the embodiment of the present utility model, by adopting the flexible heating component 20, it can fit the outer surface of the container body 10 to achieve planar heating, improve the heating uniformity, reduce the sticking of the pot and the cleaning difficulty, and reduce the local noise source formed by uneven heating of water molecules, which can fully reduce the noise. At the same time, the flexible member has a high adaptability to different installation positions, unlike the traditional electric heating tube which can only be limited to the bottom of the kettle body. By laying the flexible heating component 20 on the outer surface of the container body 10, the contact area between the heating component 20 and the container body 10 can be increased, thereby significantly improving the heating speed of the liquid and the heating efficiency. In addition, the heating component 20 specifically includes a heating film 21 and a reflective layer 22 which are overlapped, and both the heating film 21 and the reflective layer 22 are flexible members. By laying the reflective layer 22 on the surface of the heating film 21 facing away from the container body 10 to form the heating component 20, the heat radiation generated by the heating film 21 can be fully reflected, reducing the loss of heat radiation and improving the heating efficiency of the heating component 20.

[0056] As an example, the reflective layer 22 can be made of high-reflectivity materials such as aluminum foil paper and tin foil.

[0057] As an example, the heating film 21 may include a heating body 211 and a thermally conductive insulating member 212. The heating body 211 is wrapped inside the thermally conductive insulating member 212. For example, two thermally conductive insulating layers with slightly larger extension dimensions than the heating body 211 can be prepared first, and then stacked in the order of the first thermally conductive insulating layer 212a, the heating body 211, and the second thermally conductive insulating layer 212b, and then subjected to high-temperature vacuum static pressure to form the heating film 21. The heating body 211 can be made of whisker carbon nanotubes and high-temperature fibers, as thin as a piece of paper, in the shape of a paper sheet, very light, with uniform heating, soft, hydrophobic, foldable and punchable, acid and alkali resistant, thermoplastic, with a temperature rise of up to 200°C in one-second dry burning, fatigue resistant, flame retardant, and a service life of up to 50,000 h, having electromagnetic shielding and electrostatic protection functions. The thermally conductive insulating member 212 can be made of materials with thermally conductive and insulating properties, such as epoxy resin glass fiber board, silicone film, polyimide film, etc.

[0058] As an example, such as Figure 3As shown, the liquid heating device may further include a housing 30 and a handle 40 connected to each other, as well as a cover 50 located at the top of the housing 30. The container body 10 is located inside the housing 30, and the cover 50 can cover the container body 10 and the housing 30. These structures together constitute the main structure of the liquid heating device. The housing 30 and the container body 10 can form an assembly sandwich layer. The handle 40 can be a hollow structure, and the inner cavity of the handle 40 is connected to the assembly sandwich layer. The formed space can be used to assemble other components. For example, a power connection terminal 60 can be arranged in the inner cavity of the handle 40. One end of the power connection terminal 60 is connected to the electronic components inside the liquid heating device, and the other end extends out of the handle 40 for connecting to an external power source to realize the power supply of the liquid heating device.

[0059] In some embodiments, the heating component 20 further includes a heat insulation member. Among them, the heat insulation member and the reflective layer 22 are constructed as an integral structure; or as Figure 2 shown, the heat insulation member is constructed as a heat insulation layer 23, and the heat insulation layer 23 is overlapped and arranged on the surface of the reflective layer 22 facing away from the heating film 21.

[0060] In these embodiments, by further adding a heat insulation member to the heating component 20, the cooling effect caused by heat conduction and heat convection in the external low-temperature environment can be reduced, thereby reducing the negative impact on the working efficiency of the heating component 20. In the implementation of the heat insulation member, the heat insulation member and the reflective layer 22 can be constructed as an integral structure, that is, the reflective material and the heat insulation material are constructed as an integral structure, so that the integral structure has both heat insulation and reflection functions. The heat insulation member can also be constructed as an independent heat insulation layer 23, thereby forming a three-layer structure of the heat insulation layer 23, the reflective layer 22, and the heating film 21. For the case where the heat insulation member is constructed as the heat insulation layer 23, by arranging the heat insulation layer 23 outside the reflective layer 22 and the heating film 21 instead of between the reflective layer 22 and the heating film 21, the risk of the heat insulation layer 23 bursting or carbonizing due to absorbing too much heat can be avoided, ensuring the use safety of the product. It should be understood that there are many heat insulation materials that can be used for the integrated heat insulation and reflection structure and the heat insulation layer 23, as long as they have characteristics such as low thermal conductivity, easy processing, and light weight, such as foam, glass fiber, ceramic fiber, silicone, etc. The present invention does not limit this.

[0061] In some embodiments, a heat insulation member is provided in the heating component 20 when the power density of the heating film 21 exceeds a preset value.

[0062] In these embodiments, by specifically defining that the heat insulation member is provided only when the power density of the heating film 21 is relatively high, the heat insulation member can be provided when the heating film 21 has a risk of being cooled by the external environment due to its working temperature being significantly higher than the external environment temperature, which can simplify the structure of the heating component 20 as much as possible, contribute to reasonable cost control, and simplify production. As an example, the preset value is 2 kW / m 2 .

[0063] In some embodiments, the heating film 21 is disposed on the outer surface of the container body 10 in at least one of the following ways: pasting, warm pressing and pre-tightening, spraying.

[0064] In these embodiments, by adopting at least one of the above ways, the heating film 21 can be relatively reliably disposed on the outer surface of the container body 10, realizing close contact between the heating film 21 and the container body 10, which helps to ensure the working reliability of the heating film 21.

[0065] In some embodiments, the reflective layer 22 is disposed on the surface of the heating film 21 facing away from the container body 10 in at least one of the following ways: bonding, hot pressing and pre-tightening, electric welding.

[0066] In these embodiments, by adopting at least one of the above ways, a reflective layer 22 can be integrally and relatively closely wrapped on the outer surface of the heating film 21 facing away from the container body 10, making the two basically integrated into one body, reducing the risk of the reflective layer 22 falling off during work, and thus being able to effectively reflect the heat radiated outward by the heating film 21, improving the heating efficiency of the heating component 20.

[0067] In some embodiments, as Figure 3 and Figure 4 shown, the heating component 20 is laid on the outer side surface of the container body 10; or as Figure 5 shown, the heating component 20 is laid on the outer side surface and the outer bottom surface of the container body 10.

[0068] In these embodiments, compared with a conventional liquid heating device with bottom heating, by laying the heating component 20 on the outer side surface of the container body 10, side uniform heating can be realized, the boiling noise during the liquid heating process can be reduced, and the speed of heating the liquid can be significantly increased. By further extending the heating component 20 to the outer bottom surface of the container body 10, the contact area between the heating component 20 and the container body 10 can be increased, which helps to improve the overall heating power and heating speed, and improves the flexibility of the setting scheme of the heating component 20.

[0069] In some embodiments, the number of the heating components 20 is one; or as Figure 5 and Figure 7 shown, the number of the heating components 20 is at least two, and the heating components 20 are distributed along the height direction of the container body 10. When the heating components 20 are laid on the outer side surface and the outer bottom surface of the container body 10, for example Figure 5 shown, two heating components 20 can be specifically set, one is laid on the outer side surface of the container body 10, and the other is laid on the outer bottom surface of the container body 10.

[0070] In these embodiments, the heating component 20 can be set as a whole, which can reduce the usage cost of the heating component 20 and simplify the control of the heating component 20. The number of the heating components 20 does not have to be limited to one, so as to enable flexible adjustment of the heating scheme. Specifically, by arranging a plurality of heating components 20 along the height direction of the container body 10, zonal heating and control at different heights can be achieved. For example, according to the liquid level of the liquid contained in the container body 10, the heating component 20 located below the liquid level is controlled to start to heat the liquid, which can not only achieve efficient heating, but also reduce the dry burning of the heating component 20 in the area not covered by the liquid, contributing to extending the service life of the liquid heating device. As an example, each heating component 20 is connected end to end along the circumferential direction of the container body 10, so as to achieve uniform heating along the circumferential direction of the container body 10 at the corresponding height.

[0071] In some embodiments, when the number of the heating components 20 is at least two, the heating components 20 are connected in parallel.

[0072] In these embodiments, by connecting a plurality of heating components 20 in parallel, independent control of each heating component 20 can be achieved, which helps to improve the flexibility and convenience of control. At the same time, when a local heating component 20 is damaged, the other heating components 20 can still operate without being affected, thus ensuring the working reliability of the plurality of heating components 20 as a whole. As an example, to energize the heating component 20, a live wire 24 and a neutral wire 25 need to be set, as Figure 5 and Figure 6 shown, the live wire 24 of each heating component 20 can be an independent line and is connected in parallel to the same power supply. Specifically, independent wire cores are wrapped in the same wire outer sheath, so Figure 5 and Figure 6 it looks like one live wire 24 in the figure. The neutral wires 25 of the heating components 20 can be connected to the same shared neutral wire 25. When it is necessary to control some heating components 20 to cut off the power, only the live wire 24 of the corresponding heating component 20 needs to be disconnected.

[0073] In some embodiments, when the number of the heating components is one, the liquid heating device according to the embodiment of the present invention further includes a temperature sensor 70 and a controller 80 as shown in Figure 5 and Figure 6 shown. The temperature sensor 70 is located at the top of the heating component 20; the controller 80 is connected to the temperature sensor 70 and the heating component 20, and is used to control the start and stop of the heating component 20 according to the detection signal of the temperature sensor 70. As an example, as shown in Figure 5 and Figure 6 shown, the temperature sensor 70 is connected to the controller 80 through a signal wire 26, and the heating component 20 is connected to the controller 80 through the live wire 24 and the neutral wire 25.

[0074] In these embodiments, it is found through observation and analysis that, when the heating component 20 is laid on the outer side of the container body 10, the container body 10 and the liquid inside it are often heated up first at the upper part and then at the lower part, so that the upper temperature is higher than the lower temperature. When the heating component 20 is further laid on the outer bottom surface of the container body 10, the coverage area of the heating component 20 is large, and it is not convenient to set the temperature sensor 70. Based on this, by setting the temperature sensor 70 on the top of the heating component 20, the temperature change of the heating component 20 caused by the heating liquid can be quickly captured without hindering the operation of the heating component 20, and the heating condition of the part can be reflected, thereby improving the sensitivity of temperature detection and the response rate and reliability of the controller 80. In addition, when there is liquid in the container body 10 near the height corresponding to the location of the temperature sensor 70, that is, when the liquid level in the container body 10 submerges the heating component 20, the heat generated by the heating component 20 can be quickly absorbed by the liquid, so that the temperature of the heating component 20 is significantly reduced, that is, the detection value of the temperature sensor 70 is significantly reduced or lower than a certain threshold. On the contrary, if there is no liquid here, the heating component 20 will heat up quickly due to dry burning, and the less liquid in the container body 10, the less heat generated by the heating component 20 will be absorbed, and the heating component 20 will heat up more violently at the location where the temperature sensor 70 is set. Based on this, the controller 80 can analyze the detection value of the temperature sensor 70 to roughly determine the liquid level in the container body 10, which helps to control the heating component 20 in combination with the liquid level. Specifically, the heating component 20 can be heated only when the liquid level submerges the heating component 20, which can effectively reduce the risk of dry burning of the heating component 20, extend the service life of the heating component 20, ensure the safe operation of the liquid heating device, and help improve the heating control effect.

[0075] In some embodiments, Figure 7 and Figure 8 As shown, when the number of heating components 20 is at least two, the liquid heating device according to the embodiment of the utility model also includes a temperature sensor 70 and a controller 80. In the outer side area of the container body 10, the number of temperature sensors 70 is consistent with the number of heating components 20, and a temperature sensor 70 is arranged on the top of each heating component 20; the controller 80 is connected to the temperature sensor 70 and the heating component 20, and is used to control the start and stop of the heating component 20 according to the detection signal of the temperature sensor 70.

[0076] In these embodiments, for the case of arranging multiple heating components 20, in addition to the advantages of arranging the temperature sensor 70 and the controller 80 as described above, by arranging the temperature sensor 70 in the outer side area of the container body 10 according to the number of the heating components 20, it is also possible to comprehensively understand the heating conditions of each heating component 20 on the side and the liquid level in the container body 10. Furthermore, the controller 80 can perform targeted control on the start and stop of each heating component 20, which helps to improve the control accuracy and the heating effect. It should be noted that for the case where the heating component 20 is laid on the outer bottom surface of the container body 10, there is no limitation on whether to arrange the temperature sensor 70 at the top of the heating component 20, and it can be selected according to actual needs. As an example, for the heating component 20 that needs to be provided with the temperature sensor 70, such as Figure 8 as shown, an appropriate distance can be reserved between the heating component 20 and the heating component 20 above it, so as to provide a setting space for the temperature sensor 70 of the heating component 20. It should be understood that when the number of the temperature sensors 70 is one or more, the principle of determining the liquid level in the container body 10 based on the detection values of the temperature sensors 70 is the same, and the more the number of the heating components 20 and the temperature sensors 70 and the denser the distribution, the more accurate the detection of the liquid level will be. However, according to different actual control strategies, when determining the liquid level in the container body 10 based on the detection values of each temperature sensor 70, parallel independent detections can be performed for each pair of the temperature sensor 70 and the heating component 20 to improve the response speed, or linkage detections can be performed. For example, when it is determined based on the detection value of the temperature sensor 70 at a higher position that the liquid level has submerged the heating component 20 corresponding to the temperature sensor 70, it can be directly determined that the other heating components 20 lower than the heating component 20 are also submerged, without the need to detect the temperature sensor 70 and the heating component 20 at a lower position. Correspondingly, when the controller 80 controls the start and stop of a certain heating component 20, the detection value of the temperature sensor 70 corresponding to this heating component 20 can be used as the control basis, or the detection values of other temperature sensors 70 can be used as the control basis. The above are all implementation manners of the present utility model and fall within the protection scope of the present utility model.

[0077] In some embodiments, regardless of the number of the heating components 20, for the correspondingly arranged temperature sensor 70 and the heating component 20, the distance between the temperature sensor 70 and the correspondingly arranged heating component 20 and the outer surface of the container body 10 is less than 3 mm, which can achieve a relatively close contact.

[0078] In these embodiments, the heating process of the heating component 20 is specifically to transfer heat to the container body 10, and then transfer it to the liquid contained therein through the container body 10. Therefore, at a local position, the temperatures of the heating component 20, the container body 10, and the liquid are approximately equal. By making the temperature sensor 70 closely contact with the outer surfaces of both the heating component 20 and the container body 10 simultaneously, the contact area for temperature measurement can be increased, thereby detecting a more accurate local temperature, which helps to improve the control accuracy and heating effect. It should be understood that Figure 1 , Figure 2 , Figure 6 and Figure 8 the positions of the temperature sensor 70 shown in are only for illustrative purposes and do not limit the spacing between the temperature sensor 70 and the outer surfaces of the heating component 20 and the container body 10.

[0079] In some embodiments, the action frequency of the controller 80 is higher than the detection frequency of the temperature sensor 70.

[0080] In these embodiments, by setting the action frequency of the controller 80 to be higher than the detection frequency of the temperature sensor 70, the controller 80 can act quickly when the temperature sensor 70 detects a signal, ensuring the timeliness of control. As an example, when the number of temperature sensors 70 is multiple, the detection frequencies of the respective temperature sensors 70 can be the same or different, and the present invention does not limit this. However, regardless of whether they are the same or not, the action frequency of the controller 80 needs to be higher than the detection frequency of each temperature sensor 70. The detection frequencies of the temperature sensor 70 are, for example, 500 Hz and 250 Hz, that is, the detection periods are 2 ms and 4 ms respectively.

[0081] In some embodiments, the liquid heating device further includes a liquid level display, which is connected to the controller 80 and is used to display the liquid level determined by the controller 80.

[0082] In these embodiments, by configuring the liquid level display connected to the controller 80, the liquid level determined by the controller 80 can be presented to the user, facilitating the user to intuitively understand the liquid level situation and add liquid as needed. As an example, the liquid level display can be an indicator light, which is set at the height corresponding to the set liquid level. When the controller 80 determines that the liquid level in the container body 10 reaches the set liquid level, the indicator light lights up; otherwise, the indicator light goes out. For the embodiment in which at least two heating components 20 are distributed along the height direction of the container body 10 and the number of temperature sensors 70 is the same as the number of heating components 20 in the outer side area of the container body 10, and a temperature sensor 70 is provided at the top of each heating component 20, indicator lights can be provided at the height of the set liquid level corresponding to each temperature sensor 70, so that the lit indicator light can be used to indicate that the current liquid level reaches the corresponding height. At this time, each indicator light can be independently controlled. When the controller 80 determines that the liquid level in the container body 10 reaches the set liquid level corresponding to a temperature sensor 70, the corresponding indicator light lights up, so that all the indicator lights below the current actual liquid level are lit; the indicator lights can also be jointly controlled. When the controller 80 determines that the liquid in the container body 10 reaches the set liquid levels corresponding to multiple temperature sensors 70, only the highest one of the indicator lights below the current actual liquid level is lit, and the other indicator lights are all extinguished. Of course, other feasible indicator light control methods can also be adopted, and the present utility model does not limit this. The liquid level display can also be a display screen. At this time, marks can be made at multiple different heights of the liquid heating device. For example, serial numbers can be marked, or words such as "high", "medium", and "low" can be marked, or the liquid volume at the corresponding height, such as 100 ml, 200 ml, etc., can be marked. This is not listed one by one here. The display screen can display the marks at the corresponding heights according to the liquid level determined by the controller 80. It should be understood that the implementation manner of the liquid level display here is only an exemplary illustration and not a limitation.

[0083] Although the embodiments of the present utility model have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present utility model without departing from the spirit and scope of the present utility model. It should be understood that in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present utility model defined by the claims.

Claims

1. A liquid heating device, characterized in that, The liquid heating device includes: A container body (10) for containing liquid; and A heating component (20), which is a flexible member laid on the outer surface of the container body (10). The heating component (20) includes an overlapping heating film (21) and a reflective layer (22). Among them, the reflective layer (22) is laid on one surface of the heating film (21) facing away from the container body (10).

2. The liquid heating device according to claim 1, wherein, The heating component (20) further includes a heat insulation member. Among them, the heat insulation member and the reflective layer (22) are constructed as an integral structure; or The heat insulation member is constructed as a heat insulation layer (23), and the heat insulation layer (23) is overlapped and arranged on one surface of the reflective layer (22) facing away from the heating film (21).

3. The liquid heating device according to claim 1, wherein The heating film (21) is arranged on the outer surface of the container body (10) in at least one of the following ways: pasting, temperature-pressure pre-tightening, spraying; and / or The reflective layer (22) is arranged on one surface of the heating film (21) facing away from the container body (10) in at least one of the following ways: bonding, hot-press pre-tightening, electric welding.

4. The liquid heating device according to any one of claims 1 to 3, wherein The heating component (20) is laid on the outer side surface of the container body (10); or The heating component (20) is laid on the outer side surface and the outer bottom surface of the container body (10).

5. The liquid heating device according to claim 4, wherein The number of the heating components (20) is one; or The number of the heating components (20) is at least two, and each of the heating components (20) is distributed along the height direction of the container body (10).

6. The liquid heating device according to claim 5, wherein When the number of the heating components (20) is at least two, each of the heating components (20) is connected in parallel.

7. The liquid heating device according to claim 5, characterized in that, When the number of the heating components (20) is one, the liquid heating device further includes: A temperature sensor (70) located at the top of the heating component (20); A controller (80), connected to the temperature sensor (70) and the heating component (20), for controlling the start and stop of the heating component (20) according to the detection signal of the temperature sensor (70).

8. The liquid heating device according to claim 7, wherein The distances between the temperature sensor (70) and the heating component (20) and the outer surface of the container body (10) are both less than 3 mm.

9. The liquid heating device according to claim 5, characterized in that When the number of the heating components (20) is at least two, the liquid heating device further includes: A temperature sensor (70). In the outer side surface area of the container body (10), the number of the temperature sensors (70) is the same as the number of the heating components (20), and one temperature sensor (70) is arranged at the top of each heating component (20). A controller (80), connected to the temperature sensor (70) and the heating component (20), is configured to control the start and stop of the heating component (20) according to the detection signal of the temperature sensor (70).

10. The liquid heating device according to claim 8, wherein the distance between each temperature sensor (70) and the corresponding heating component (20) and the outer surface of the container body (10) is less than 3 mm.

Images