A heating disc and a liquid heater using the same

Abstract

The utility model discloses a kind of heating disc and the liquid heater applied to it, it is related to heating disc technical field, comprising have: stainless steel contact layer, the stainless steel contact layer is used to directly contact with liquid, realize the heating conduction of liquid;Stainless steel base layer, the stainless steel base layer is used to bear thick film circuit or heating element, realize heat generation and conduction;Aluminum alloy soldering layer, the aluminum alloy soldering layer is between stainless steel contact layer and stainless steel base layer, for the welding of auxiliary stainless steel contact layer and stainless steel base layer;Stainless steel contact layer and stainless steel base layer of using S316 or S304 material, collocation porous aluminum alloy soldering layer, avoid heating disc surface rust, corrosion, prolong the service life of heating disc, while enhanced the overall structural stability of heating disc, and effectively improve heating efficiency, shorten the time of liquid heating.

Description

Technical Field

[0001] This utility model relates to the field of heating plate technology, specifically to a heating plate and a liquid heater using the same. Background Technology

[0002] In liquid heating devices such as electric kettles, the heating element is a core component, and its performance directly affects the product's heating efficiency, lifespan, and safety. As people's living standards improve, the requirements for electric kettle heating elements are also increasing.

[0003] Traditional electric kettle heating elements have several shortcomings in terms of structure and materials. For example, some heating elements use a single material, which cannot simultaneously guarantee corrosion resistance, thermal conductivity, and the stability of the heating element. When in direct contact with liquid, they are easily corroded by various chemicals in the liquid, causing the heating element surface to rust and corrode. This not only shortens the lifespan of the heating element but may also cause metal ions to dissolve into the liquid, affecting the quality of the liquid and posing a potential threat to the user's health.

[0004] Furthermore, traditional heating plate structures primarily rely on conventional resistance wire heating, which has numerous limitations. Specifically, traditional resistance wire heating plates have relatively low thermal efficiency. During energy conversion, due to the inherent characteristics of the resistance wire and its heat conduction with the surrounding environment, a significant amount of electrical energy is converted into heat and dissipated into the surrounding environment, failing to be effectively concentrated on the object being heated. This not only wastes energy but also increases operating costs and energy consumption, contradicting modern energy conservation and environmental protection principles.

[0005] Therefore, it is necessary to propose an improved technical solution to address the above problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] A heating plate, comprising:

[0008] A stainless steel contact layer, which is used to directly contact the liquid to achieve heat conduction to the liquid;

[0009] A stainless steel base layer is used to support thick-film circuits or heating elements to achieve heat generation and conduction.

[0010] An aluminum alloy flux layer is located between the stainless steel contact layer and the stainless steel base layer, and is used to assist in the welding of the stainless steel contact layer and the stainless steel base layer.

[0011] As a further embodiment of this utility model: the stainless steel contact layer and the stainless steel base layer are both made of S316 or S304.

[0012] As a further embodiment of this utility model: the aluminum alloy flux layer is a porous aluminum alloy structure.

[0013] As a further embodiment of this utility model: the mating surfaces of the stainless steel contact layer and the aluminum alloy welding layer, as well as the mating surfaces of the aluminum alloy welding layer and the stainless steel base layer, are all planar.

[0014] As a further embodiment of this utility model: the stainless steel contact layer, the aluminum alloy soldering layer, and the center of the aluminum alloy soldering layer all penetrate each other to form a mounting hole.

[0015] As a further embodiment of this utility model: a connecting structure is formed on the surface of the stainless steel base away from the aluminum alloy welding layer.

[0016] As a further embodiment of this utility model, the connection structure is a threaded column.

[0017] As a further embodiment of this utility model: the stainless steel contact layer extends outward from its periphery to form an extension portion, and the extension portion is bent.

[0018] As a further embodiment of this utility model, the aluminum alloy flux layer is welded by a brazing process.

[0019] This invention also proposes a liquid heater that utilizes the heating plate described above.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1) The stainless steel contact layer is in direct contact with the liquid. The corrosion resistance of stainless steel itself can effectively prevent the erosion of chemicals in the liquid, avoid rusting and corrosion on the surface of the heating plate, extend the service life of the heating plate, and at the same time, prevent metal ions from dissolving into the liquid, ensuring the quality of the liquid and protecting the health and safety of users.

[0022] 2) The presence of the aluminum alloy flux layer makes the welding between the stainless steel contact layer and the stainless steel base layer stronger, enhancing the overall structural stability of the heating plate. The stable structure further improves the corrosion resistance of the heating plate, because the integrity of the structure can reduce the possibility of liquid penetration into the interior and reduce the risk of internal corrosion.

[0023] 3) Both the stainless steel contact layer and the aluminum alloy soldering layer have good thermal conductivity, which can quickly and evenly conduct the heat generated by the thick film circuit or heating element on the stainless steel base to the liquid. This efficient heat conduction method reduces heat loss inside the heating plate, improves heating efficiency, and shortens the liquid heating time.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] 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 these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the planar structure of this utility model;

[0027] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0028] The reference numerals and names in the figure are as follows:

[0029] 1. Stainless steel contact layer; 2. Stainless steel base layer; 3. Aluminum alloy soldering layer; 4. Mounting holes; 5. Connection structure; 6. Extension section. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-2 In this embodiment of the utility model, a heating plate suitable for liquid heaters (such as electric kettles) includes:

[0032] Stainless steel contact layer 1, which is used to directly contact the liquid to achieve heat conduction to the liquid;

[0033] Stainless steel base layer 2, which is used to support thick film circuits or heating elements to realize heat generation and conduction;

[0034] An aluminum alloy flux layer 3 is located between the stainless steel contact layer 1 and the stainless steel base layer 2, and is used to assist in the welding of the stainless steel contact layer 1 and the stainless steel base layer 2.

[0035] In this utility model, the heating plate adopts a layered structure, which fully considers the characteristics of different materials: stainless steel has good corrosion resistance and certain thermal conductivity, and is used in the stainless steel contact layer 1 and the stainless steel base layer 2, which can respectively meet the anti-corrosion requirements when in contact with liquid and the stability requirements of supporting the heating element; aluminum alloy has good thermal conductivity and weldability, and is used as the aluminum alloy welding flux layer 3, placed between the stainless steel contact layer 1 and the stainless steel base layer 2, using its characteristics to assist the welding of the two stainless steel layers, thus realizing the combination of the advantages of different materials.

[0036] Through layered design, the different functions of the heating plate are divided into zones. The stainless steel contact layer 1 is specifically responsible for contacting the liquid and conducting heat, the stainless steel base layer 2 focuses on supporting the thick film circuit or heating element to generate heat, and the aluminum alloy soldering layer 3 plays the role of connecting and strengthening the structure, so that each part can efficiently complete its specific function and avoid the performance deficiency caused by a single material having to take on multiple functions.

[0037] Traditional resistance wire heating methods suffer from high energy loss, while thick film circuits use processes such as printing and sintering to fabricate heating materials on a stainless steel base layer 2, forming a uniform heating body. The heating principle of thick film circuits allows electrical energy to be converted into heat energy more concentratedly, reducing heat loss during conduction and thus improving energy conversion efficiency.

[0038] In summary, the stainless steel contact layer 1 is in direct contact with the liquid. The inherent corrosion resistance of stainless steel effectively prevents the erosion of chemicals in the liquid, avoiding rust and corrosion on the heating plate surface, thus extending the service life of the heating plate. Simultaneously, it prevents metal ions from dissolving into the liquid, ensuring liquid quality and protecting the health and safety of users. The presence of the aluminum alloy soldering layer 3 makes the weld between the stainless steel contact layer 1 and the stainless steel base layer 2 more robust, enhancing the overall structural stability of the heating plate. This stable structure further improves the corrosion resistance of the heating plate, as the structural integrity reduces the possibility of liquid penetration into the interior, lowering the risk of internal corrosion. Both the stainless steel contact layer 1 and the aluminum alloy soldering layer 3 have excellent thermal conductivity, enabling the rapid and uniform transfer of heat generated by the thick-film circuit or heating element on the stainless steel base layer 2 into the liquid. This efficient heat transfer method reduces heat loss within the heating plate, improves heating efficiency, and shortens the liquid heating time.

[0039] In this embodiment of the present invention, the stainless steel contact layer 1 and the stainless steel base layer 2 are both made of S316 or S304; the aluminum alloy flux layer 3 is a porous aluminum alloy structure.

[0040] S316 is a stainless steel material with excellent corrosion resistance. In applications such as electric kettle heating plates, the stainless steel contact layer 1 is in direct contact with water and other liquids, making it susceptible to corrosion from various chemicals in the water (such as dissolved minerals, trace acids and alkalis). While the stainless steel base layer 2 is not in direct contact with the liquid, it may still face corrosion risks due to moisture and other factors during the heating plate's operation. S316 material effectively resists this corrosion, ensuring the heating plate will not be damaged by corrosion during long-term use and guaranteeing its performance stability. In addition to corrosion resistance, S316 also possesses good thermal conductivity and a certain degree of mechanical strength. As the stainless steel contact layer 1, its good thermal conductivity allows heat to be quickly transferred from the heat source to the liquid, improving heating efficiency. As the base layer, its mechanical strength ensures that it will not deform when supporting thick-film circuits or heating elements, ensuring the normal operation of the heating elements.

[0041] S304 is a common austenitic stainless steel containing 18% chromium and 8% nickel. It can form a dense chromium oxide film on its surface, providing excellent corrosion resistance and protecting against impurities in water and acid / alkali corrosion, thus ensuring the lifespan of the heating element. It is highly malleable and easy to process, meeting the shape and size requirements of different heating elements. It has high strength and toughness, withstanding thermal expansion and contraction stress and maintaining structural stability. It has excellent thermal conductivity, improving heating efficiency. Furthermore, it meets food hygiene standards, is non-toxic and harmless, ensuring user health. In terms of cost, S304 is moderately priced, effectively controlling costs and enhancing product competitiveness. It is also widely used in the manufacture of heating elements for various electric kettles and similar products, demonstrating strong versatility and adaptability.

[0042] Aluminum alloy itself has good weldability, but the porous structure further increases its contact area with the stainless steel contact layer 1 and the stainless steel base layer 2. During the welding process, more contact area means more welding points, which can significantly improve the strength of the weld and allow the three-layer structure to be better combined to form a stable whole. The porous structure also has a certain degree of elasticity, which can buffer the stress difference between the stainless steel contact layer 1 and the stainless steel base layer 2 caused by thermal expansion and contraction during the operation of the heating plate, reducing the risk of delamination or cracking caused by thermal stress. At the same time, the porous structure can also adjust the heat conduction path to a certain extent, so that the heat is more evenly distributed on the entire heating plate.

[0043] In this embodiment of the present invention, the mating surfaces of the stainless steel contact layer 1 and the aluminum alloy welding flux layer 3, as well as the mating surfaces of the aluminum alloy welding flux layer 3 and the stainless steel base layer 2, are all planar.

[0044] During the welding process, the planar mating surfaces can provide a larger and more uniform contact area. When welding is performed, the welding material can be more evenly distributed on the plane, so that a stronger and more stable welded connection can be formed between the stainless steel contact layer 1 and the aluminum alloy flux layer 3, and between the aluminum alloy flux layer 3 and the stainless steel base layer 2; wherein, the aluminum alloy flux layer is welded by brazing process.

[0045] Heat conduction requires a good contact interface. The planar mating surface makes the contact between different layers tighter and reduces thermal resistance. When the thick film circuit or heating element generates heat, the heat can be transferred more smoothly and evenly from the stainless steel base layer 2 to the aluminum alloy solder layer 3, then to the stainless steel contact layer 1, and finally to the liquid to be heated through the planar mating surface. This uniform heat conduction method helps to improve heating efficiency and avoid problems such as local overheating or inconsistent heating speed caused by uneven heat conduction.

[0046] In this embodiment of the present invention, the stainless steel contact layer 1, the aluminum alloy soldering layer 3, and the center of the aluminum alloy soldering layer 3 all penetrate each other to form the mounting hole 4.

[0047] The mounting hole 4 serves as a positioning reference during installation and plays a crucial role in the assembly of the heating plate. In actual production, workers can use this mounting hole 4 to quickly and accurately align and fix the stainless steel contact layer 1, the aluminum alloy welding layer 3, and the stainless steel base layer 2, ensuring a high level of fit between these three layers. This precise fit not only reduces errors and adjustment time during assembly and avoids problems such as uneven heating and structural instability caused by installation deviations, but also significantly improves production efficiency. At the same time, it ensures that every heating plate produced has a highly consistent quality, guaranteeing the stability and reliability of product quality, which is conducive to large-scale standardized production for enterprises.

[0048] In the design of electric kettles, precise water temperature control is a crucial performance indicator. Installing a temperature sensor at the center mounting hole 4 of the stainless steel contact layer 1, aluminum alloy solder layer 3, and stainless steel base layer 2 enables more direct and accurate temperature measurement. From the perspective of heat conduction principles, the center position is the core area for heat generation and conduction by the heating element. When the heating element is working, heat is generated from the thick-film circuit or heating element of the stainless steel base layer 2, efficiently conducted through the aluminum alloy solder layer 3, and then transferred to the stainless steel contact layer 1 to heat the water. Temperature changes at the center position most accurately and timely reflect the real-time status of the entire heating process. Furthermore, the temperature at this location is relatively stable and representative. Installing a sensor here allows for more reliable and accurate temperature data. Based on this precise data, the electric kettle can accurately control the heating power and adjust the heating state promptly according to changes in water temperature, effectively preventing abnormal situations such as dry burning. This ensures safe use and the quality of hot water, providing users with a better experience.

[0049] Regarding the water inlet function of the electric kettle, the design of the central mounting hole 4 also has unique advantages. This mounting hole 4 can be connected to the water inlet pipe inside the kettle. When water needs to be added to the kettle, water can enter the kettle through the central mounting hole 4. Utilizing gravity or external pressure, the water flow can be evenly (or relatively evenly) distributed around the heating plate. This even water flow distribution ensures that the water can fully contact the stainless steel contact layer 1, allowing heat to be transferred from the heating plate to the water more efficiently, greatly improving heating efficiency and heating uniformity. At the same time, it avoids local overheating or dry burning caused by uneven water flow, ensuring the safe and stable operation and efficient heating performance of the electric kettle, and extending the service life of the heating plate and the entire electric kettle.

[0050] In this embodiment of the present invention, a connecting structure 5 is formed on the surface of the stainless steel base layer 2 away from the aluminum alloy welding layer 3.

[0051] Considering that the heating plate needs to be connected to external devices or components to achieve its heating function in practical applications, a connecting structure 5 is formed by extending from the lower end of the heating plate. This design is based on a comprehensive consideration of mechanical connection and heat transfer. From the perspective of mechanical connection, the connecting structure 5 with a specific shape and size (such as bolt holes, threaded posts, snap-fit ​​structures, or welded flanges) can easily and firmly connect the heating plate to the support structure, power connection components, or heat dissipation components of other devices, ensuring the stability and reliability of the heating plate during operation. From the perspective of heat transfer, the rationally designed connecting structure 5 can minimize the additional thermal resistance caused by the connection while ensuring the strength of the mechanical connection, so that the heat generated by the heating plate can be effectively transferred to the external device, or the connecting structure 5 can better integrate external heat dissipation measures with the heating plate, further optimizing the thermal performance of the entire heating system.

[0052] In this embodiment of the present invention, the stainless steel contact layer 1 extends outward from its periphery to form an extension portion 6, and the extension portion 6 is bent.

[0053] The presence of the extension portion 6 increases the contact area between the stainless steel contact layer 1 and the surrounding environment (mainly liquid). According to the principle of heat conduction, the larger the contact area, the higher the heat transfer efficiency. During the heating process, more heat can be quickly transferred to the liquid through the extension portion 6, improving the heating efficiency. At the same time, after heating is completed, the extension portion 6 can also serve as a heat dissipation area, accelerating the heat dissipation speed of the heating plate, reducing the accumulation of heat in the heating plate, and reducing the risk of damage to other components of the heating plate due to overheating.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A heating plate, characterized in that, Including: A stainless steel contact layer, which is used to directly contact the liquid to achieve heat conduction to the liquid; A stainless steel base layer is used to support thick-film circuits or heating elements to achieve heat generation and conduction. An aluminum alloy flux layer is located between the stainless steel contact layer and the stainless steel base layer, and is used to assist in the welding of the stainless steel contact layer and the stainless steel base layer.

2. A heating plate according to claim 1, characterized in that, Both the stainless steel contact layer and the stainless steel base layer are made of S316 or S304.

3. A heating plate according to claim 1, characterized in that, The aluminum alloy flux layer has a porous aluminum alloy structure.

4. A heating plate according to claim 1, characterized in that, The mating surfaces of the stainless steel contact layer and the aluminum alloy flux layer, as well as the mating surfaces of the aluminum alloy flux layer and the stainless steel base layer, are all planar.

5. A heating plate according to claim 1, characterized in that, The stainless steel contact layer, the aluminum alloy soldering layer, and the center of the aluminum alloy soldering layer all penetrate each other to form mounting holes.

6. A heating plate according to claim 1, characterized in that, A connection structure extends from the surface of the stainless steel base layer away from the aluminum alloy welding layer.

7. A heating plate according to claim 6, characterized in that, The connection structure is a threaded column.

8. A heating plate according to claim 1, characterized in that, The stainless steel contact layer extends outward from its periphery to form an extension portion, and the extension portion is bent.

9. A heating plate according to claim 1 or 3, characterized in that, The aluminum alloy flux layer is welded using a brazing process.

10. A liquid heater, characterized in that, The heating plate described in any one of claims 1-9 is used.

Images