Titanium heating appliance and method of manufacturing the same

Abstract

The application discloses a titanium heating appliance and a manufacturing method thereof. The titanium heating appliance comprises a container made of titanium material, an inner part of the container is used for containing heated water, and a titanium crystalline layer is arranged on a surface of the container; a heat transfer member is arranged on an outer side of a bottom of the container, a heat transfer cavity is formed between the heat transfer member and the bottom of the container, and the heat transfer cavity is communicated with an inner cavity of the container; and an electric heating assembly is arranged on an outer side of the heat transfer member, the electric heating assembly continuously heats water entering the heat transfer cavity through the heat transfer member, and the heating of the water in the container is completed. The electric heating assembly of the application is not welded with the container, and does not directly contact the container, but heats the container through the heat transfer member, thereby avoiding the oxidation and blackening of the container caused by welding and high temperature of long-term heating, guaranteeing the appearance aesthetics, and maintaining the crystalline state of the titanium crystalline layer and the corresponding surface performance.

Description

TECHNICAL FIELD

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

[0002] Electric heating water devices such as electric kettles, electric cups and electric pots are widely used for heating and cooking water or other beverages such as drinking water, tea, coffee and soy milk, etc. Traditional electric heating water devices use glass, ceramic or stainless steel containers to hold water. Glass and ceramic have good corrosion resistance and high temperature safety, but are brittle and easy to break. Stainless steel is strong and not easy to break, but has insufficient corrosion resistance and high temperature safety.

[0003] Using titanium to make a water container has many advantages. Titanium has a low density, making titanium water containers lightweight and easy to carry. Titanium also has high strength and wear resistance, making it very durable. Titanium can resist corrosion from a variety of chemicals, including acids, bases, and salts, so titanium water containers are not easily corroded and have excellent corrosion resistance, which is particularly important for water that may contain various minerals and acidic or basic substances. Titanium has good compatibility with the human body and does not release harmful substances, so using a titanium water container to drink water is harmless to human health. Titanium has excellent anti-pollution properties, which can reduce the growth of bacteria and algae in water containers and maintain the cleanliness of the water. Titanium has good fatigue resistance, meaning it can resist the formation and propagation of cracks in repeated use scenarios such as filling and removing the water container, improving the service life and reliability of the water container. Titanium has a high strength-to-weight ratio, meaning it has a much lower density than many other metals such as steel and iron while maintaining high strength, allowing titanium water containers to remain lightweight while also being able to withstand significant pressure. Titanium can form special patterns on its surface, which not only have a decorative effect but also improve the surface properties of the material to some extent, making titanium water containers not only practical but also aesthetically pleasing. Titanium maintains stable performance in various environments, whether in high or low temperature environments, without affecting its performance, making titanium water containers suitable for a variety of environmental conditions. Titanium is recyclable, meaning that when the water container reaches the end of its service life, the material can be recycled and reused, reducing its impact on the environment.

[0004] When using titanium to make a water container for an electric heating water device, the electric heating assembly is fixed to the bottom of the container. The high temperature generated by the welding of the electric heating assembly and the long-term high temperature can cause the container bottom in direct contact with it to oxidize and turn black, affecting the appearance. For titanium crystalline surfaces, it can also change the original crystalline state, leading to a decline in the performance of the container surface. SUMMARY

[0005] The present application provides a titanium heating appliance 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-mentioned purpose, the present application provides a titanium heating appliance, comprising:

[0007] a container made of titanium material, an inner part of the container being used for containing heated water, and a surface of the container having a titanium crystalline layer;

[0008] a heat transfer member arranged on an outer side of a bottom of the container, the heat transfer member and the bottom of the container forming a heat transfer cavity, the heat transfer cavity being in communication with an inner cavity of the container;

[0009] an electric heating assembly arranged on an outer side of the heat transfer member, the electric heating assembly continuously heating water entering the heat transfer cavity through the heat transfer member, so as to complete the heating of the water in the inner part of the container.

[0010] Further, the heat transfer cavity comprises an upper enclosing part and a lower enclosing part, the upper enclosing part being located at the bottom of the container, and the lower enclosing part being located at the heat transfer member, the upper enclosing part and / or the lower enclosing part having a protrusion so that the upper enclosing part and the lower enclosing part abut to form the heat transfer cavity.

[0011] Further, the protrusion comprises a first inner protrusion arranged on the upper enclosing part and directed towards the inner cavity of the container, and a first outer protrusion arranged on the lower enclosing part and directed away from the inner cavity of the container, an outer edge of the first outer protrusion and an inner edge of the first inner protrusion being matched.

[0012] Further, the upper enclosing part is provided with at least one through hole so that the heat transfer cavity is in communication with the inner cavity of the container.

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

[0014] Further, the electric heating assembly comprises a heating tube and a heat dissipation plate, the heat transfer member, the heat dissipation plate and the heating tube being arranged in sequence from top to bottom, and the heat transfer member, the heat dissipation plate and the heating tube being welded.

[0015] Further, the heat transfer member and the container are welded or bonded by an adhesive.

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

[0017] The titanium metal sheet is pressed and stretch formed according to the shape of the container to obtain a semi-finished product of the container, and a surface crystallization process is performed on the container;

[0018] The heat transfer member, the heat dissipation plate and the heating tube are welded and fixed, the heat dissipation plate is welded to the bottom of the heat transfer member, and the heating tube is welded to the bottom of the heat dissipation plate;

[0019] The surface of the heat transfer member is treated to eliminate the discoloration caused by welding;

[0020] The heat transfer member is fixed to the bottom of the container by welding or adhesion, and the heat transfer member is connected to the bottom of the container to form a heat transfer cavity.

[0021] Further, the environmental temperature of the surface crystallization process is 900-1200℃.

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

[0023] The application has the following beneficial effects: the electric heating assembly is not welded with the container, nor directly contacted with the container, but heats the container through the heat transfer member, avoiding the oxidation and blackening of the container caused by welding and long-term high temperature heating, ensuring the appearance beauty, maintaining the crystallization state of the titanium crystalline layer and the corresponding surface performance; at the same time, the heat transfer member and the bottom of the container form a heat transfer cavity, the heat transfer cavity is communicated with the inner cavity of the container, the water in the heat transfer cavity can be quickly heated by the electric heating assembly compared with the water in the inner cavity, so that the hot water in the heat transfer cavity and the cold water in the inner cavity further quickly form a convection, and the heating efficiency of the appliance is improved.

[0024] In order to better understand and implement, the application is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a whole schematic view of a titanium heating appliance provided in an exemplary embodiment;

[0026] Figure 2 is a bottom structure schematic view of a titanium heating appliance provided in an exemplary embodiment;

[0027] Figure 3 is an explosion schematic view of a titanium heating appliance provided in an exemplary embodiment;

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

[0029] Figure 5is a vertical sectional view of embodiment 2 of a titanium heating appliance provided in the exemplary embodiments;

[0030] Figure 6 is a vertical sectional view of embodiment 1 of a titanium heating appliance provided in the exemplary embodiments;

[0031] Figure 7 is a vertical sectional view of embodiment 3 of a titanium heating appliance provided in the exemplary embodiments.

[0032] wherein, Figures 1 to 7 Reference signs in the drawings are explained as follows:

[0033] 1 container, 11 titanium crystalline layer;

[0034] 2 electric heating assembly, 21 heat dissipation plate, 22 heating tube, 23 temperature sensing hole;

[0035] 3 heat transfer member;

[0036] 4 heat transfer cavity, 41 upper enclosing part, 42 lower enclosing part, 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 application, further detailed description will be made to the present application with reference to the accompanying drawings.

[0038] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

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

[0040] The following description refers to the accompanying drawings. Unless otherwise noted, like elements in different drawings have the same or similar reference numerals. The following description of illustrative embodiments is not meant to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first", "second", "third", etc., merely identify similar objects in the description, and are not necessarily indicative of a particular order or sequence, nor are they intended to indicate or imply relative importance of the referenced objects.

[0041] In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. The "and / or" describes the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0042] At present, the heating appliances for heating water include electric heating cups, electric heating pots, electric heating bottles, electric heating pans, electric tea pots or electric steam sterilization pots, etc. They all have a container for containing water in the appliance, and an electric heating assembly is arranged at the bottom of the container. The electric heating assembly heats the water in the container after being powered on. In order to ensure the health and safety of the heating process of water, the electric heating assembly does not contact with water, but is arranged outside the bottom of the container, and the heat is transferred to the water in the container through heating the bottom of the container to complete the heating. According to different application fields of the heating appliance, the shape of the container can be circular, rectangular or square, etc.

[0043] The following description refers to the accompanying drawings. Figures 1-7 A titanium heating appliance is described according to some embodiments of the present application.

[0044] The titanium heating appliance provided by the embodiments of the present application includes a container 1 and an electric heating assembly 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 piece 3 is arranged on the outside of the bottom of the container 1, and the electric heating assembly 2 is arranged outside the heat transfer piece 3. The heat transfer piece 3 and the bottom of the container 1 form a heat transfer cavity 4, which is in communication with the inner cavity of the container 1. The electric heating assembly 2 heats the water entering the heat transfer cavity 4 through the heat transfer piece 3, thereby completing the heating of the water in the container 1.

[0045] The electric heating assembly 2 generates high temperature of about 600℃ during welding, and generates high temperature of about 150-450℃ during working. The high temperature directly acts on the container 1 containing water, which causes the contacted part to be oxidized and blackened. The container 1 is made of titanium metal material, which has the related characteristics to make the container 1 have significant appearance aesthetics, especially the titanium crystalline layer 11 formed after recrystallization of the surface, which has unique and unique pattern texture and can further improve the strength and wear resistance of the surface. Therefore, in order to avoid the influence of the welding high temperature and working high temperature of the electric heating assembly 2 on the container 1, the electric heating assembly 2 is not welded and connected with the container 1, but connected with the container 1 through the heat transfer piece 3. In this way, the electric heating assembly 2 does not directly contact the container 1, but heats the water entering the heat transfer cavity 4 through the heat transfer piece 3. The heated water circulates with the water in the container 1 and transfers heat to complete the overall heating of the water in the container 1, thereby avoiding the direct action of the welding and long-term heating high temperature on the bottom of the container 1 and causing it to be oxidized and blackened, ensuring the appearance aesthetics, and also avoiding the damage to the titanium crystalline layer 11, maintaining the crystalline state and the corresponding surface properties of the titanium crystalline layer 11.

[0046] The heat transfer cavity 4 includes an upper surrounding part 41 and a lower surrounding part 42, wherein the upper surrounding part 41 is located on the bottom wall of the container 1, and the lower surrounding part 42 is located on the heat transfer piece 3. The upper surrounding part 41 and the lower surrounding part 42 are connected and surrounded to form the heat transfer cavity 4 by setting a protrusion in one of the upper surrounding part 41 and the lower surrounding part 42, or in both the upper surrounding part 41 and the lower surrounding part 42. The heat transfer cavity 4 formed by the protrusion makes the heat generated by the electric heating assembly 2 concentrated on the heat transfer cavity 4 through the heat conduction surface of the heat transfer piece 3. Since the space of the heat transfer cavity 4 is small, the amount of water in the heat transfer cavity 4 is also small. The small amount of water in the heat transfer cavity 4 rapidly heats up under the concentrated action of heat, and a large temperature difference is generated between the heat transfer cavity 4 and the water in the container 1 in a short time. The greater 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 on the water.

[0047] In different embodiments, the protrusion has different setting modes of the upper surrounding part 41 and the lower surrounding part 42 and different protrusion directions of the protrusion itself. The protrusion direction toward the inner cavity direction of the container 1 is an inner protrusion, and the protrusion direction away from the inner cavity direction of the container 1 is an outer protrusion.

[0048] In embodiment 1, as shown in FIG. 1, the upper surrounding part 41 of the container 1 is provided with a protrusion 41a, and the lower surrounding part 42 of the heat transfer piece 3 is provided with a protrusion 42a. The protrusion 41a of the upper surrounding part 41 and the protrusion 42a of the lower surrounding part 42 are connected and surrounded to form the heat transfer cavity 4. Figure 4 and FIG. 2, the upper surrounding part 41 of the container 1 is provided with a protrusion 41a, and the lower surrounding part 42 of the heat transfer piece 3 is provided with a protrusion 42a. The protrusion 41a of the upper surrounding part 41 and the protrusion 42a of the lower surrounding part 42 are connected and surrounded to form the heat transfer cavity 4. Figure 6As shown, the protrusions include a first inner protrusion 411 disposed in the upper enclosure 41 and a first outer protrusion 421 disposed in the lower enclosure 42. The outer edge of the first outer protrusion 421 matches the inner edge of the first inner protrusion 411. Thus, when the upper enclosure 41 and the lower enclosure 42 are joined together, the outer sidewall of the first outer protrusion 421 can approach the inner sidewall of the first inner protrusion 411, thereby forming a gap suitable for laser welding or adhesive bonding. The heat transfer element 3 is then connected to the bottom of the container 1 by laser welding or adhesive bonding. In Embodiment 1, the first inner protrusion 411 is disposed on the bottom wall of the container 1, and the first outer protrusion 421 is disposed on the heat transfer element 3. While forming the heat transfer cavity 4, the upper enclosure 41 and the lower enclosure 42 have a large distance between them. The bottom wall of the container 1 is minimally affected by the heating of the electric heating component 2, thus allowing for long-term use without oxidation or blackening.

[0049] Of course, when the upper enclosure 41 is provided with the first inner protrusion 411, the lower enclosure 42 may not have a protrusion but a flat heat transfer element 3. After the upper enclosure 41 and the lower enclosure 42 are joined, they can also enclose and form a heat transfer cavity 4. Alternatively, 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. The outer edge of the second inner protrusion matches the inner edge of the first inner protrusion 411. The protrusion height of the second inner protrusion is less than the protrusion height of the first inner protrusion 411. In this way, after the upper enclosure 41 and the lower enclosure 42 are joined, they can still enclose and form a heat transfer cavity 4.

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

[0051] To achieve communication between the heat transfer cavity 4 and the container 1, allowing water in the container 1 to circulate with the water in the heat transfer cavity 4, at least one through hole 44 is provided in the upper enclosure 41 to communicate with the inner cavity of the container 1. When the upper enclosure 41 has a protrusion, the through hole 44 can be provided 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 provided on the surface and / or side of the first inner protrusion 411, or the through hole 44 is provided on the surface and / or side of the first outer protrusion 421. When the upper enclosure 41 does not have a protrusion but is a flat surface, the through hole 44 is provided on the bottom wall of the container 1 corresponding to the heat transfer element 3.

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

[0053] Preferably, in Example 3, as shown in the appendix Figure 7 As shown, the through hole 44 is located on the side of the first inner protrusion 411. This ensures that during daily use, the user cannot see the through hole 44 from the front of the container 1, nor can they observe the heat transfer element 3 at the bottom of the container 1 through the through hole 44. The user sees only the internal surface of the container 1, which appears uniform and integrated. Furthermore, to improve the health and safety of the heating appliance during long-term use, the heating element 3 can also be made of titanium. However, after prolonged use, the surface of the heat transfer element 3 may oxidize and turn black, or develop scale residue. If these surface defects are visible to the user through the through hole 44, they will affect the overall appearance of the container 1. Therefore, by providing a protrusion and placing the through hole 44 on the side of the protrusion, the upper enclosure 41 can shield the heat transfer element 3 from view, preventing it from being exposed and avoiding the impact of surface defects on the appearance of the container 1 after long-term use.

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

[0055] In the technical solution of the embodiment of the application, the electric heating component 2 is arranged on the bottom outer side of the heat transfer member 3, the electric heating component 2 comprises a heating tube 22 and a heat dissipation plate 21, the heat transfer member 3, the heat dissipation plate 21 and the heating tube 22 are sequentially welded and connected to form an integral component, and then the heat transfer member 3 is welded or bonded to the container 1 to complete the connection and fixation of the container 1, the heat transfer member 3 and the electric heating component 2.

[0056] In addition, a temperature sensing hole 23 is formed in the heat dissipation plate 21, a temperature sensing probe of the device is in contact with the heat transfer member 3 through the temperature sensing hole 23, and the real-time temperature of the heated water in the container 1 is determined by obtaining the surface temperature of the heat transfer member 3.

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

[0058] The titanium metal sheet is stretched and formed according to the shape of the container to obtain a semi-finished product of the container, and a surface crystallization process is performed on the container; specifically, the environmental temperature of the surface crystallization process is 900-1200℃.

[0059] The heat transfer member, the heat dissipation plate and the heating tube are welded and fixed, the heat dissipation plate is welded to the bottom of the heat transfer member, and the heating tube is welded to the bottom of the heat dissipation plate; preferably, the welding of the heat transfer member, the heat dissipation plate and the heating tube is brazing; specifically, the heat transfer member, the heat dissipation plate and the heating tube are placed in a brazing furnace, the heat dissipation plate is brazed to the bottom of the heat transfer member and the heating tube is brazed to the bottom of the heat dissipation plate by brazing agent and flux, the environmental temperature of brazing is 550-600℃; after brazing, an annealing process is further performed, the environmental temperature of the annealing process is 500-530℃, the annealing process lasts for 10-20 minutes; after the annealing process is completed, the heat transfer member, the heat dissipation plate and the heating tube welded and connected as an integral whole are taken out at room temperature;

[0060] The surface of the heat transfer member is treated to eliminate the discoloration and blackening caused by welding;

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

[0062] The titanium heating appliance manufactured by the manufacturing method, the container 1 filled with water is made of titanium material, which is pressed and drawn by titanium metal sheet according to the final product shape of the container 1, and has a titanium crystalline layer 11 on the surface after recrystallization treatment, the electric heating assembly 2 is firstly connected with the heat transfer piece 3 by brazing, and then is welded or bonded with the bottom of the container 1 by the heat transfer piece 2, thereby completing the manufacturing of the whole titanium heating appliance. In order to ensure the appearance effect of the container 1, the container 1, the heat transfer piece 3 and the electric heating assembly 2 are respectively manufactured and the corresponding surface treatment is completed, and finally the welding or adhesive bonding is completed, so that the titanium crystalline layer 11 on the surface of the container 1 is basically not affected by the welding, and the appearance effect of the surface of the titanium crystalline layer 11 is maintained.

[0063] Specifically, the container 1, the heat transfer piece 3 and the electric heating assembly 2 are respectively manufactured and the corresponding surface treatment is completed, and then assembled, so that the steps of forming and surface crystallization of the container 1 in the manufacturing method and the steps of welding of the heat transfer piece 3, the heat dissipation plate 21 and the heating pipe 22 and the surface treatment of the heat transfer piece 3 can be simultaneously performed or the order thereof can be changed, and the manufacturing of the titanium heating appliance can be realized.

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

[0065] Because the heat dissipation plate 21 and the heating pipe 22 are generally made of aluminum, and the melting point of aluminum is about 630℃, the brazing environment temperature and the annealing temperature are both below 600℃. The brazing environment temperature and the annealing temperature are determined according to the wall thickness, the shape size and the size of the brazing part of the heat transfer piece 3, the heat dissipation plate 21 and the heating pipe 22. Preferably, the brazing environment temperature is 550-600℃, the annealing environment temperature is 500-530℃, and the annealing time is 10-20 minutes. The brazing temperature is selected to be below the melting point of aluminum, so as to avoid damage of the aluminum heat dissipation plate 21 and the heating pipe 22 due to high-temperature melting, and a higher temperature can promote the brazing agent and the flux to fully melt and have good fluidity, so as to tightly fill the welding gap and enhance the bonding effect with the welding surface, thereby obtaining a tight welding strength; and the annealing process after brazing can make the above-mentioned components to be annealed quickly obtain the heat required for releasing the internal welding stress, and avoid new internal stress caused by overheat due to long-time high temperature.

[0066] Specifically, in the manufacturing method, after the brazing with the electric heating assembly 2, the surface treatment of the heat transfer piece 3 includes polishing or sand blasting, and the surface mainly refers to the inner surface of the heat transfer piece 3 towards the bottom of the container 1, which directly contacts the heated water in the container 1 and can also be seen by the user through the through hole 44, so that the polishing or sand blasting can ensure the safety of the material contacting the water during the heating and the overall appearance of the container 1.

[0067] Specifically, in the manufacturing method, the heat transfer piece 3 can be welded to the bottom of the container 1 by laser welding, and the power and speed of the laser welding are selected according to the wall thickness of the heat transfer piece 3 and the container 1, the gap between the upper enclosing portion 41 of the container 1 and the lower enclosing portion 42 of the heat transfer piece 3, and the welding efficiency. The preferred power of the laser welding is 600-900W, and the welding speed is 10-30mm / s. As a heating appliance for heating water, the wall thickness of the container 1 and the heat transfer piece 3 is generally less than 5mm, and the gap is basically within 3mm. Combined with the melting point of titanium metal material, the welding power of 600-900W can realize the necessary melting of the container 1 and the heat transfer piece 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 the laser welding, and avoid the damage of 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 piece 3 is bonded to the bottom of the container 1 by using an adhesive, the adhesive used is a food-grade silicone adhesive. The food-grade silicone adhesive can meet the connection strength and use temperature of the heat transfer piece 3 and the container 1, and will not damage the appearance of the bonding surface of the heat transfer piece 3 and the container 1.

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

Claims

1. A titanium heating appliance, characterized in that, include: A container made of titanium, the interior of which is used to hold heated water, and the surface of which has a titanium crystalline layer; A heat transfer element, made of titanium, is disposed on the outer bottom of the container. The heat transfer element and the bottom of the container form a heat transfer cavity. The heat transfer cavity includes an upper enclosure and a lower enclosure. The upper enclosure is located at the bottom of the container, and the lower enclosure is located at the heat transfer element. The upper enclosure and the lower enclosure are joined together to form the heat transfer cavity. The upper enclosure has at least one through hole to allow the heat transfer cavity to communicate with the inner cavity of the container. An electric heating component is disposed on the outside of the heat transfer element. The electric heating component continuously heats the water entering the heat transfer chamber through the heat transfer element, thereby completing the heating of the water inside the container. After long-term use, surface defects appear on the surface of the heat transfer element. The upper enclosure is provided with a first inner protrusion facing the inner cavity of the container, and the through hole is provided on the side of the first inner protrusion to cover the heat transfer element, thereby preventing surface defects of the heat transfer element after use from being exposed to the user's view. The lower enclosure is provided with a water guide hole, which can be opened and closed by a switch device. When the water guide hole is open, water is injected into the container or the water inside the container is released through the connected external pipe. When the water guide hole is closed, the heating device heats the water in the heat transfer chamber normally to complete the heating of the water in the container.

2. A titanium heating appliance according to claim 1, characterized in that, The lower enclosure is provided with a first outward protrusion in the direction away from the inner cavity of the container, and the outer edge of the first outward protrusion matches the inner edge of the first inner protrusion.

3. A titanium heating appliance according to claim 2, characterized in that, The through hole is also provided on the surface of the first inner protrusion.

4. A titanium heating appliance according to claim 1, characterized in that, The electric heating assembly includes a heating element and a heat sink. The heat transfer element, the heat sink, and the heating element are arranged sequentially from top to bottom, and the heat transfer element, the heat sink, and the heating element are welded together.

5. A titanium heating appliance according to any one of claims 1-4, characterized in that, The heat transfer element is welded to the container or bonded with an adhesive.

6. A method for manufacturing a titanium heating appliance, characterized in that, The titanium heating appliance is the titanium heating appliance according to any one of claims 1-5, the electric heating assembly includes a heating element and a heat sink, and the manufacturing method includes the following steps: Titanium metal sheets are 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. The heat transfer element, heat sink, and heating element are welded and fixed together. The heat sink is welded to the bottom of the heat transfer element, and the heating element is welded to the bottom of the heat sink. The surface of the heat transfer component is treated to eliminate surface discoloration and blackening caused by welding; The heat transfer element is aligned with the bottom of the container and fixed by welding or adhesive bonding, and the heat transfer element is connected to the bottom of the container to form a heat transfer cavity.

7. A method for manufacturing a titanium heating appliance according to claim 6, characterized in that, The ambient temperature for the surface crystallization process is 900-1200℃.

8. A method for manufacturing a titanium heating appliance according to claim 6, characterized in that, The heat transfer component is fixed to the bottom of the container by laser welding. The laser welding power is 600-900W and the welding speed is 10-30mm / s.

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