Titanium heating appliance and manufacturing method thereof

Abstract

The invention discloses a titanium heating appliance and a manufacturing method thereof, and the titanium heating appliance comprises a container which is made of a titanium material, the interior of the container is used for containing heated water, and the surface of the container is provided with a titanium crystal layer; the heat transfer part is arranged on the outer side of the bottom of the container, a heat transfer cavity is formed by the heat transfer part and the bottom of the container, and the heat transfer cavity communicates with an inner cavity of the container; the electric heating assembly is arranged on the outer side of the heat transfer part, and the electric heating assembly continuously heats the water entering the heat transfer cavity through the heat transfer part so as to heat the water in the container. The electric heating assembly is not welded to the container and not in direct contact with the container, the container is heated through the heat transfer piece, the situation that the container is oxidized and blackened due to welding and high temperature caused by long-term heating is avoided, the appearance attractiveness is guaranteed, and the crystalline state and the corresponding surface performance of the titanium crystallization layer are kept.

Description

Technical Field

[0001] The present application relates to the technical field of electric heating devices, and in particular to a titanium heating device and a manufacturing method thereof. Background Art

[0002] Electric water heating devices such as electric kettles, electric water cups and electric pots are widely used in drinking water, tea, coffee, soy milk and other categories because they can heat and cook water or other beverages safely and quickly. Traditional electric water heating devices mostly use glass, ceramics or stainless steel to make containers for holding water. Although glass and ceramics have good corrosion resistance and high temperature safety, they are brittle and fragile. Although stainless steel is strong and not easy to break, it is still insufficient in corrosion resistance and high temperature safety.

[0003] The use of titanium metal to make water containers has many advantages; titanium metal has a low density, which makes titanium water containers light and easy to carry; at the same time, titanium is strong and wear-resistant, so it has good durability; titanium metal can resist corrosion from a variety of chemical substances, including acids, alkalis, salts, etc., so titanium water containers are not easily chemically eroded and have excellent corrosion resistance. This feature is especially important for water that may contain various minerals and acidic and alkaline substances; titanium metal has good compatibility with the human body and will not release harmful substances. Drinking water from titanium water containers is harmless to human health; titanium alloys have excellent anti-pollution properties, which can reduce the growth of bacteria and algae for water containers and keep the water clean; titanium metal has good fatigue resistance, which means that it can be used in scenarios where water containers are repeatedly loaded and unloaded. Resisting the formation and expansion of cracks improves the service life and reliability of water containers; titanium alloy has a high strength-to-weight ratio, which means that while it maintains high strength, its density is much lower than many other metals, such as steel and iron, which allows titanium water containers to withstand greater pressure while remaining light; special patterns can be formed on the surface of titanium metal, which are not only decorative, but also can improve the surface properties of the material to a certain extent, making titanium water containers practical while also having high aesthetics; titanium metal can maintain stable performance in various environments, and its performance will not be affected whether in high or low temperature environments, which makes titanium water containers suitable for various environmental conditions; titanium metal is recyclable, which means that when the water container reaches the end of its service life, the material can be recycled and reused, reducing the impact on the environment.

[0004] When titanium is used to make the water container in the electric water heating device, the electric heating component is fixed to the bottom of the container. The high temperature generated by the welding of the electric heating component and the long-term high temperature will cause the bottom of the container in direct contact with it to oxidize and blacken, affecting the appearance; and the titanium crystal surface may also change the original crystal state, resulting in a decrease in the surface performance of the container. Summary of the invention

[0005] The present application provides a titanium heating device and a manufacturing method thereof, aiming to at least improve one of the technical problems existing in the prior art.

[0006] According to the above purpose, the present application provides a titanium heating device, including:

[0007] A container made of titanium material, the interior of the container is used to hold heated water, and the surface of the container has a titanium crystal layer;

[0008] A heat transfer element, which is disposed on the outer side of the bottom of the container, wherein the heat transfer element and the bottom of the container form a heat transfer cavity, and the heat transfer cavity is communicated with the inner cavity of the container;

[0009] The electric heating component is arranged on the outer side of the heat transfer element. The electric heating component continuously heats the water entering the heat transfer cavity through the heat transfer element, thereby completing the heating of the water inside the container.

[0010] Furthermore, the heat transfer cavity includes an upper enclosure portion and a lower enclosure portion, the upper enclosure portion is located at the bottom of the container, the lower enclosure portion is located at the heat transfer element, and the upper enclosure portion and / or the lower enclosure portion have a protrusion so that the upper enclosure portion and the lower enclosure portion are aligned and enclosed to form the heat transfer cavity.

[0011] Furthermore, the protrusion includes a first inner protrusion arranged on the upper enclosure portion toward the inner cavity of the container, and a first outer protrusion arranged on the lower enclosure portion away from the inner cavity of the container, and the outer edge of the first outer protrusion matches the inner edge of the first inner protrusion.

[0012] Furthermore, the upper enclosure portion is provided with at least one through hole to enable the heat transfer cavity to communicate with the inner cavity of the container.

[0013] Furthermore, when the upper enclosing portion has the protrusion, a plurality of the through holes are arranged on the surface and / or side of the protrusion.

[0014] Furthermore, the electric heating assembly includes a heating tube and a heat sink, the heat transfer element, the heat sink and the heating tube are arranged in sequence from top to bottom, and the heat transfer element, the heat sink and the heating tube are welded and connected.

[0015] Furthermore, the heat transfer element and the container are bonded by welding or adhesive.

[0016] The present application also provides a method for manufacturing the above-mentioned titanium heating device, wherein the electric heating component comprises a heating tube and a heat dissipation plate, and the manufacturing method comprises the following steps:

[0017] Pressing and stretching a titanium metal sheet into a shape according to a container to obtain a semi-finished container, and subjecting the container to a surface crystallization process;

[0018] The heat transfer element, the heat sink and the heat pipe are welded and fixed, the heat sink is welded to the bottom of the heat transfer element, and the heat pipe is welded to the bottom of the heat sink;

[0019] Treating the surface of the heat transfer element to eliminate the discoloration and blackening of the surface caused by welding;

[0020] The heat transfer element is aligned with the bottom of the container and fixed by welding or bonding with adhesives, and the heat transfer element is connected to the bottom of the container to form a heat transfer cavity.

[0021] Furthermore, the ambient temperature of the surface crystallization process is 900-1200°C.

[0022] Furthermore, the heat transfer element is aligned with the bottom of the container and fixed by laser welding, the power of the laser welding is 600-900W, and the welding speed is 10-30mm / s.

[0023] The present application has the following beneficial effects: the electric heating component is not welded to the container, nor is it in direct contact with the container, but heats the container through the heat transfer element, thereby avoiding oxidation and blackening of the container caused by welding and high temperature of long-term heating, ensuring the beautiful appearance, and maintaining the crystallization state of the titanium crystal layer and the corresponding surface properties; at the same time, a heat transfer cavity is formed between the heat transfer element and the bottom of the container, and the heat transfer cavity is connected to the inner cavity of the container. Compared with the water in the inner cavity, the water in the heat transfer cavity can be quickly heated up by the electric heating component, so that the hot water in the heat transfer cavity and the cold water in the inner cavity further quickly form convection, so that the heating efficiency of the appliance is improved.

[0024] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an overall schematic diagram of a titanium heating device provided in an exemplary embodiment;

[0026] Figure 2 is a schematic diagram of the bottom structure of a titanium heating device provided in an exemplary embodiment;

[0027] Figure 3 is an exploded schematic diagram of a titanium heating device provided in an exemplary embodiment;

[0028] Figure 4 is a vertical cross-sectional view of Example 1 of a titanium heating device provided in an exemplary embodiment;

[0029] Figure 5is a vertical cross-sectional view of Example 2 of a titanium heating device provided in an exemplary embodiment;

[0030] Figure 6 is a vertical cross-sectional structural diagram of Example 1 of a titanium heating device provided in an exemplary embodiment;

[0031] Figure 7 It is a vertical cross-sectional structural diagram of Example 3 of a titanium heating device provided in an exemplary embodiment.

[0032] in, Figures 1 to 7 The reference numerals in the figures are described as follows:

[0033] 1 container, 11 titanium crystal layers;

[0034] 2 electric heating components, 21 heat sink, 22 heating tube, 23 temperature probe hole;

[0035] 3. Heat transfer parts;

[0036] 4 heat transfer cavity, 41 upper enclosure, 42 lower enclosure, 411 first inner protrusion, 421 first outer protrusion, 422 second outer protrusion, 43 water guide hole, 44 through hole. DETAILED DESCRIPTION

[0037] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0038] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0040] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0042] At present, heating appliances used to heat water include electric water cups, electric kettles, electric water bottles, electric water cookers, electric tea kettles or electric steam sterilizers, etc., all of which have a container for holding water inside the appliance, and an electric heating component at the bottom of the container. The electric heating component heats the water in the container after being powered on. In order to ensure the health and safety of the water heating process, the electric heating component does not contact the water, but is arranged on the outside of the bottom of the container, and heats the water in the container by heating the bottom of the container. Depending on the different application fields of the heating appliance, the shape of the container can be round, rectangular or square, etc.

[0043] Refer to the following Figure 1-7 A titanium heating device according to some embodiments of the present application is described.

[0044] The embodiment of the present application provides a titanium heating device, including a container 1 and an electric heating component 2. The container 1 is made of titanium metal material, and the surface of the container 1 has a titanium crystal layer 11 formed after recrystallization treatment. A heat transfer element 3 is arranged on the outer side of the bottom of the container 1, and the electric heating component 2 is arranged on the outer side of the heat transfer element 3. The heat transfer element 3 and the bottom of the container 1 form a heat transfer cavity 4, and the heat transfer cavity 4 is connected to the inner cavity of the container 1. The electric heating component 2 heats the water entering the heat transfer cavity 4 through the heat transfer element 3, thereby completing the heating of the water inside the container 1.

[0045] The electric heating component 2 will generate a high temperature of about 600°C during welding, and a high temperature of about 150-450°C when the electric heating component 2 is working. The high temperature directly acts on the container containing water, causing the contacted parts to oxidize and turn black. The use of titanium metal material to make the container 1 is to utilize the relevant characteristics of titanium metal to make the container 1 have a significant aesthetic appearance, especially the titanium crystal layer 11 formed after recrystallization on the surface, which has a unique pattern and texture, and can further improve the strength and wear resistance of the surface. Therefore, in order to prevent the container 1 from being affected by the welding high temperature and the operating high temperature of the electric heating component 2, the electric heating component 2 is not welded to the container 1, but is connected to the container 1 through the heat transfer component 3. In this way, the electric heating component 2 is not in direct contact with the container 1, but heats the water entering the heat transfer cavity 4 through the heat transfer component 3. The heated water then circulates with the water in the container 1 and transfers heat to complete the overall heating of the water in the container 1. Therefore, it is avoided that the high temperature of welding and long-term heating directly acts on the bottom of the container 1 and causes it to oxidize and blacken, thereby ensuring the beautiful appearance. At the same time, it also avoids damage to the titanium crystal layer 11, and maintains the crystal state and corresponding surface properties of the titanium crystal layer 11.

[0046] The heat transfer cavity 4 includes an upper enclosure 41 and a lower enclosure 42, wherein the upper enclosure 41 is located on the bottom wall of the container 1, and the lower enclosure 42 is located on the heat transfer element 3. By providing a protrusion on one of the upper enclosure 41 and the lower enclosure 42, or on both the upper enclosure 41 and the lower enclosure 42, the upper enclosure 41 and the lower enclosure 42 are connected to form a heat transfer cavity 4. The heat transfer cavity 4 formed by the protrusion allows the heat generated by the electric heating component 2 to be concentrated in the heat transfer cavity 4 through the heat conduction surface of the heat transfer element 3. Since the space of the heat transfer cavity 4 is small and the amount of water in the heat transfer cavity 4 is also small, the small amount of water in the heat transfer cavity 4 is rapidly heated under the concentrated action of heat, so that a large temperature difference is generated between the heat transfer cavity 4 and the water in the container 1 in a short time. The larger the temperature difference, the faster the circulation of water between the heat transfer cavity 4 and the container 1, thereby improving the overall heating efficiency of the heating device for water.

[0047] In different embodiments, the protrusion has different settings on the upper enclosure 41 and the lower enclosure 42 and different protrusion directions of the protrusion itself, among which the protrusion facing the inner cavity of the container 1 is an inner protrusion, and the protrusion away from the inner cavity of the container 1 is an outer protrusion.

[0048] In Example 1, as shown in the attached Figure 4 and attached Figure 6As shown, the protrusions include a first inner protrusion 411 provided on the upper enclosure 41 and a first outer protrusion 421 provided on the lower enclosure 42, and the outer edge of the first outer protrusion 421 matches the inner edge of the first inner protrusion 411, so that when the upper enclosure 41 and the lower enclosure 42 are abutted and enclosed, the outer side surface of the side wall of the first outer protrusion 421 can be close to the inner side surface of the side wall of the first inner protrusion 411, thereby forming a gap suitable for laser welding or adhesive bonding, and then the heat transfer element 3 is connected to the bottom of the container 1 by laser welding or adhesive bonding. In Example 1, the first inner protrusion 411 is provided on the bottom wall of the container 1, and the first outer protrusion 421 is provided on the heat transfer element 3. When the heat transfer cavity 4 is enclosed to form, the upper enclosure 41 and the lower enclosure 42 have a large spacing, and the bottom wall of the container 1 is least affected by the heating of the electric heating component 2, so it can be used for a long time without oxidation and blackening.

[0049] Of course, when the upper enclosure 41 is provided with the first inner protrusion 411, the lower enclosure 42 may also have a heat transfer member 3 with a flat surface instead of a protrusion, and the upper enclosure 41 and the lower enclosure 42 may also be combined to form a heat transfer cavity 4 after being connected; or, when the upper enclosure 41 is provided with the first inner protrusion 411, the lower enclosure 42 has a second inner protrusion (not shown in the figure) that protrudes inward like the first inner protrusion 411, and the outer edge of the second inner protrusion matches the inner edge of the first inner protrusion 411, and the protrusion height of the second inner protrusion is less than the protrusion height of the first inner protrusion 411, so that the upper enclosure 41 and the lower enclosure 42 can still be combined to form a heat transfer cavity 4 after being connected.

[0050] In Example 2, as shown in the attached Figure 5 As shown, when the lower enclosure 42 is provided with the first outer protrusion 421, the upper enclosure 41 may also not have a protrusion, and the bottom of the container 1 is a flat surface; or, when the lower enclosure 42 is provided with the first outer protrusion 421, the upper enclosure 41 has a second outer protrusion 422 that protrudes outward like the first outer protrusion 421, and the inner edge of the first outer protrusion 421 matches the outer edge of the second outer protrusion 422, and the protrusion height of the second outer protrusion 422 is less than the protrusion height of the first outer protrusion 421, so that the upper enclosure 41 and the lower enclosure 42 can still enclose to form the heat transfer cavity 4 after docking.

[0051] In order to achieve the communication between the heat transfer cavity 4 and the cavity of the container 1, so that the water in the container 1 can circulate with the water in the heat transfer cavity 4, at least one through hole 44 is provided on the upper enclosure 41 to connect the heat transfer cavity 4 with the inner cavity of the container 1. When the upper enclosure 41 has a protrusion, the through hole 44 can be arranged on the surface and / or side of the protrusion, that is, when the upper enclosure 41 has a first inner protrusion 411 or a first outer protrusion 421, the through hole 44 is arranged on the surface and / or side of the first inner protrusion 411, or the through hole 44 is arranged on the surface and / or side of the first outer protrusion 421. When the upper enclosure 41 has no protrusion but a flat surface, the through hole 44 is arranged on the bottom wall of the container 1 corresponding to the heat transfer element 3.

[0052] The through hole 44 is processed simultaneously when the container 1 is processed, and will not affect the subsequent connection between the container 1 and the heat transfer element 3. In the embodiment 1, the through hole 44 is arranged on the surface of the first inner protrusion 411.

[0053] Preferably, in Example 3, as shown in the attached Figure 7 As shown, the through hole 44 is arranged on the side of the first inner protrusion 411, so that in daily use, the user cannot see the through hole 44 from the front use direction of the container 1, nor can the heat transfer element 3 at the bottom of the container 1 be observed through the through hole 44. What the user sees is the inner surface of the container 1 with a complete and unified effect. In addition, in order to improve the health and safety of the long-term use of the heating device, the heating element 3 can also be made of titanium material. After long-term use, the surface of the heat transfer element 3 will be oxidized and blackened or scale will remain. If these surface defects are exposed to the user's field of vision through the through hole 44, it will affect the overall appearance of the container 1. Therefore, the upper enclosure 41 can shield the heat transfer element 3 from being exposed and entering the user's field of vision by providing a protrusion and providing the through hole 44 on the side of the protrusion, thereby avoiding the influence of the surface defects of the heat transfer element 3 after long-term use on the appearance of the container 1.

[0054] In different usage scenarios, the capacity of the container 1 of the heating device of the embodiment of the present application is designed to be of different sizes to meet the needs of different heated water volumes. When the capacity of the container 1 is small, the water can be taken in and poured out by moving the container 1 and through the upper opening of the container 1; and when the capacity of the container 1 is large or it is fixed and inconvenient to move the container 1, a water guide hole 43 is provided in the lower enclosure 42, and the water guide hole 43 can be opened and closed by a switch device. When the water guide hole 43 is opened, water is injected into the container 1 or the water in the container 1 is discharged through a connected external pipeline. After the water guide hole 43 is closed, the heating device heats the water in the heat transfer cavity 4 normally to complete the heating of the water in the container 1.

[0055] In the technical solution of the embodiment of the present application, the electric heating component 2 is arranged on the bottom outer side of the heat transfer component 3, and the electric heating component 2 includes a heating tube 22 and a heat sink 21. The heat transfer component 3, the heat sink 21 and the heating tube 22 are welded in sequence from top to bottom and connected to each other as an integral component. The container 1, the heat transfer component 3 and the electric heating component 2 can be connected and fixed by welding or gluing the heat transfer component 3 to the container 1 with an adhesive.

[0056] In addition, a temperature detection hole 23 is opened on the heat sink 21. The temperature sensing probe of the device passes through the temperature detection hole 23 and contacts the heat transfer element 3. The real-time temperature of the heated water in the container 1 is measured by obtaining the surface temperature of the heat transfer element 3.

[0057] Another embodiment of the present application further provides a method for manufacturing a titanium heating device, wherein the titanium heating device is the titanium heating device provided above, and the manufacturing method comprises the following steps:

[0058] The titanium metal sheet is pressed and stretched into shape according to the container shape to obtain a semi-finished container, and the container is subjected to a surface crystallization process; specifically, the ambient temperature of the surface crystallization process is 900-1200°C.

[0059] The heat transfer element, the heat sink and the heating tube are welded and fixed, the heat sink is welded to the bottom of the heat transfer element, and the heating tube is welded to the bottom of the heat sink. Brazing is preferably used for welding the heat transfer element, the heat sink and the heating tube. Specifically, the heat transfer element, the heat sink and the heating tube are placed in a brazing furnace, and the heat sink and the heating tube are brazed to the bottom of the heat transfer element and the heating tube is brazed to the bottom of the heat sink by means of brazing flux and soldering flux. The ambient temperature for brazing is 550-600°C. After brazing, an annealing process is performed. The ambient temperature for the annealing process is 500-530°C, and the annealing process takes 10-20 minutes. After the annealing process is completed, the temperature is lowered to room temperature and the heat transfer element, the heat sink and the heating tube that are welded together are taken out.

[0060] Treat the surface of the heat transfer parts to eliminate the discoloration and blackening caused by welding;

[0061] The heat transfer element is aligned with the bottom of the container and fixed by welding or bonding with adhesives, and the heat transfer element is connected to the bottom of the container to form a heat transfer cavity.

[0062] The titanium heating device manufactured by the manufacturing method has a container 1 for holding water made of titanium, which is formed by pressing and stretching a titanium metal sheet according to the shape of the final product of the container 1, and has a titanium crystal layer 11 on the surface that has been recrystallized. The electric heating component 2 is first brazed to the heat transfer element 3, and then the heat transfer element 2 is welded to the bottom of the container 1 or bonded with an adhesive to complete the manufacturing of the entire titanium heating device. In order to ensure the appearance of the container 1, the container 1, the heat transfer element 3 and the electric heating component 2 are manufactured and completed with the corresponding surface treatment, and finally assembled by welding or bonding with an adhesive, so that the titanium crystal layer 11 on the surface of the container 1 will not be affected by welding, and the appearance of the surface of the titanium crystal layer 11 is kept intact.

[0063] Specifically, the container 1, the heat transfer element 3 and the electric heating component 2 are manufactured separately and assembled after completing the corresponding surface treatment. Therefore, the steps of forming and surface crystallizing the container 1 and the steps of welding the heat transfer element 3, the heat sink 21 and the heating tube 22 and the surface treatment of the heat transfer element 3 in the manufacturing method can be performed simultaneously or in a different order according to actual conditions, and both can realize the manufacturing of titanium heating appliances.

[0064] Specifically, in the manufacturing method, the brazing furnace for brazing can be a vacuum furnace or a high-frequency furnace, and a cooling system is provided in the brazing furnace. The cooling system includes an electronic control valve and a cooling device. The cooling device can adopt any one or more of an inert gas cooling device, a fan cooling device, a water tower cooling device, and a condensing device.

[0065] Because the heat sink 21 and the heating tube 22 are generally made of aluminum, and the melting point of aluminum is about 630°C, the ambient temperature and annealing temperature of brazing are both below 600°C. The selection of the ambient temperature and annealing temperature of brazing is determined according to the wall thickness, external dimensions and size of the brazing part 3, the heat sink 21 and the heating tube 22, and the size of the brazing part. The preferred ambient temperature of brazing is 550-600°C, the ambient temperature of the annealing process is 500-530°C, and the time of the annealing process is 10-20 minutes. The brazing temperature is selected to be below the melting point of aluminum, which can avoid the aluminum heat sink 21 and the heating tube 22 from being melted and damaged by high temperature. The higher temperature can make the brazing flux and the soldering flux fully melt and have good fluidity, which can tightly fill the welding gap and enhance the bonding effect with the welding surface, thereby obtaining a tight welding strength. In the annealing process after brazing, since the heat transfer element 3 and the heat sink 21 are thin-walled products, the aluminum material of the heat sink 21 and the heating tube 22 has good thermal conductivity, and the annealing temperature slightly lower than the brazing temperature and the shorter annealing time are used, the above-mentioned parts that need to be annealed can quickly obtain the heat required to release the internal welding stress, and avoid overheating caused by long-term high temperature and the generation of new internal stress.

[0066] Specifically, in this manufacturing method, after brazing with the electric heating component 2 is completed, the surface treatment of the heat transfer element 3 includes polishing or sandblasting. The surface here mainly refers to the inner surface of the heat transfer element 3 facing the bottom of the container 1. This part of the surface is in direct contact with the water heated in the container 1 and may also be seen by the user through the through hole 44. Therefore, polishing or sandblasting can not only ensure the safety of the material in contact with water during the heating process, but also ensure the overall appearance of the container 1.

[0067] Specifically, in the manufacturing method, laser welding can be used to weld the heat transfer element 3 to the bottom of the container 1. The power and speed of laser welding are selected according to the wall thickness of the heat transfer element 3 and the container 1, the gap between the upper enclosure 41 of the container 1 and the lower enclosure 42 of the heat transfer element 3, and the welding efficiency. The preferred laser welding power is 600-900W and the welding speed is 10-30mm / s. As a heating device for heating water, the wall thickness of the container 1 and the heat transfer element 3 is generally less than 5mm, and the gap is basically within 3mm. Combined with the melting point of titanium metal materials, a welding power of 600-900W is selected to achieve the necessary melting of the container 1 and the heat transfer element 3 to form a molten pool that can fill the gap, reduce the area of ​​the outer surface of the bottom of the container 1 affected by laser welding, and avoid damage to the inner surface of the bottom of the container 1 caused by excessive melting of the welding part.

[0068] Specifically, in the manufacturing method, when the heat transfer element 3 is bonded to the bottom of the container 1 by an adhesive, the adhesive used is food-grade silicone adhesive. The food-grade silicone adhesive can meet the connection strength and use temperature requirements of the heat transfer element 3 and the container 1, and will not damage the appearance of the bonding surface between the heat transfer element 3 and the container 1.

[0069] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A titanium heating device, characterized in that: include: A container made of titanium material, the interior of the container is used to hold heated water, and the surface of the container has a titanium crystal layer; A heat transfer element, which is disposed on the outer side of the bottom of the container, wherein the heat transfer element and the bottom of the container form a heat transfer cavity, and the heat transfer cavity is communicated with the inner cavity of the container; The electric heating component is arranged on the outer side of the heat transfer element. The electric heating component continuously heats the water entering the heat transfer cavity through the heat transfer element, thereby completing the heating of the water inside the container.

2. A titanium heating device according to claim 1, characterized in that: The heat transfer cavity includes an upper enclosure and a lower enclosure, wherein the upper enclosure is located at the bottom of the container, and the lower enclosure is located at the heat transfer element, and the upper enclosure and / or the lower enclosure have protrusions so that the upper enclosure and the lower enclosure are aligned and enclosed to form the heat transfer cavity.

3. A titanium heating device according to claim 2, characterized in that: The protrusion includes a first inner protrusion arranged on the upper enclosure portion toward the inner cavity of the container, and a first outer protrusion arranged on the lower enclosure portion away from the inner cavity of the container, and the outer edge of the first outer protrusion matches the inner edge of the first inner protrusion.

4. A titanium heating device according to claim 2, characterized in that: The upper enclosure portion is provided with at least one through hole to connect the heat transfer cavity with the inner cavity of the container.

5. A titanium heating device according to claim 4, characterized in that: When the upper enclosing portion has the protrusion, a plurality of the through holes are arranged on the surface and / or side surface of the protrusion.

6. A titanium heating device according to claim 1, characterized in that: The electric heating assembly comprises a heating tube and a heat sink. The heat transfer element, the heat sink and the heating tube are arranged in sequence from top to bottom, and the heat transfer element, the heat sink and the heating tube are welded and connected.

7. A titanium heating device according to any one of claims 1 to 6, characterized in that: The heat transfer element and the container are bonded by welding or adhesive.

8. A method for manufacturing a titanium heating device, characterized in that: The titanium heating device is a titanium heating device according to any one of claims 1 to 7, the electric heating assembly comprises a heating tube and a heat sink, and the manufacturing method comprises the following steps: Pressing and stretching a titanium metal sheet into a shape according to a container to obtain a semi-finished container, and subjecting the container to a surface crystallization process; The heat transfer element, the heat sink and the heat pipe are welded and fixed, the heat sink is welded to the bottom of the heat transfer element, and the heat pipe is welded to the bottom of the heat sink; Treating the surface of the heat transfer element to eliminate the discoloration and blackening of the surface caused by welding; The heat transfer element is aligned with the bottom of the container and fixed by welding or bonding with adhesives, and the heat transfer element is connected to the bottom of the container to form a heat transfer cavity.

9. The method for manufacturing a titanium heating device according to claim 8, characterized in that: The ambient temperature of the surface crystallization process is 900-1200°C.

10. The method for manufacturing a titanium heating device according to claim 8, characterized in that: The heat transfer element is aligned with the bottom of the container and fixed by laser welding. The power of the laser welding is 600-900W and the welding speed is 10-30mm / s.

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