High-temperature-resistant composite heater

Abstract

The utility model provides a high-temperature-resistant composite heater, which comprises a ceramic seat and a nickel-chromium heating sheet arranged in the ceramic seat, the nickel-chromium heating sheet is hollowed out, a loop is formed in a non-hollowed-out area of the nickel-chromium heating sheet, and two ends of the loop of the nickel-chromium heating sheet are respectively connected with a nickel wire through spot welding. And the two nickel wires serve as lead wires of the loop and extend out of the ceramic seat. The nickel-chromium heating sheet and the spot welding nickel wire are used as the lead, so that the high temperature resistance of the welding part between the lead and the nickel-chromium heating sheet is improved, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic cigarette field, concretely relates to a high temperature resistant composite heater. BACKGROUND

[0002] The electronic cigarette ceramic heater usually includes a ceramic seat and a metal heating component installed in the ceramic seat, which achieves the effect of atomizing the tobacco tar by heating the tobacco tar. The metal heating sheet component includes a metal heating sheet and a lead wire welded at both ends of the metal heating sheet. The prior art usually adopts brazing to weld the lead wire and the metal heating sheet. Silver copper solder is mostly used for brazing. It can be used in an environment of 800 DEG C in the short term. Even if it is long-term, it can only be used in an environment of 400 DEG C. The general electronic cigarette liquid atomization temperature requirement reaches 150-450 DEG C. The temperature is too low to cause incomplete atomization of the tobacco tar, reduce the amount of smoke, affect the taste, and possibly produce bad taste or harmful substances (such as tar and other harmful chemical substances), thereby causing potential risks to health. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a high temperature resistant composite heater, which mainly solves the problem of poor high temperature resistance of the welding part between the heating sheet and the lead wire.

[0004] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0005] The utility model provides a high temperature resistant composite heater, which includes a ceramic seat and a nickel-chromium heating sheet installed inside the ceramic seat. The nickel-chromium heating sheet is hollow, and the non-hollow area of the nickel-chromium heating sheet forms a loop. The loop of the nickel-chromium heating sheet is connected to one nickel wire at each end by spot welding. The two nickel wires act as lead wires of the loop and extend outside the ceramic seat.

[0006] As a preferred, the nickel-chromium heating sheet is circular and has a circular hole in the center. The top surface of the ceramic seat is provided with an annular groove matching the shape of the nickel-chromium heating sheet. The nickel-chromium heating sheet is located in the annular groove, and the two nickel wires extend outside the ceramic seat from two notches provided on the side surface of the annular groove.

[0007] As a preferred, the ceramic seat includes a bottom plate, a first limiting ring and a second limiting ring formed by the upward protrusion of the top surface of the bottom plate. The first limiting ring is located inside the second limiting ring. The first limiting ring, the second limiting ring and the bottom plate form an annular groove. The second limiting ring is provided with two notches for the nickel wires to extend out.

[0008] As a kind of preferred, ceramic seat is equipped with ceramic cover plate, the bottom surface of nickel-chromium heating sheet is pasted with annular groove groove bottom by high-temperature resistant glue, nickel-chromium heating sheet is inserted into annular groove, and annular groove is filled with high-temperature resistant glue and firmly bonded ceramic cover plate, ceramic cover plate covers on ceramic seat and closes annular groove.

[0009] As a kind of preferred, bottom plate is equipped with center hole, the center hole of bottom plate is located inside first limiting ring, the center of the three of first limiting ring, second limiting ring, the center hole of bottom plate coincides.

[0010] As a kind of preferred, the high-temperature resistant glue is inorganic high-temperature alumina powder glue.

[0011] The utility model has the following beneficial effects:

[0012] Nickel-chromium heating sheet and spot welding nickel wire are used as lead, improve the high-temperature resistance of welding position between lead and nickel-chromium heating sheet, and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic view of nickel-chromium heating sheet of the embodiment;

[0014] Figure 2 It is the connection schematic view of nickel-chromium heating sheet and nickel wire of the embodiment;

[0015] Figure 3 It is the structure schematic view of ceramic seat of the embodiment;

[0016] Figure 4 It is the structure schematic view of ceramic cover plate of the embodiment;

[0017] Figure 5 It is the assembly flow chart of high-temperature resistant composite heater of the embodiment. DETAILED DESCRIPTION

[0018] The utility model is further described below in connection with the drawings and embodiment.

[0019] In the description of the utility model, it needs to be understood that, the orientation or position relationship indicated by terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular orientation, is constructed and operated with a particular orientation, so it cannot be understood as the limitation to the utility model.

[0020] As Figures 1 to 5As shown, the embodiment discloses a high-temperature-resistant composite heater, which comprises a ceramic base 1 and a nickel-chromium heating sheet 2 installed inside the ceramic base 1. The nickel-chromium heating sheet 2 is provided in a hollowed-out manner, and the non-hollowed-out area of the nickel-chromium heating sheet 2 forms a loop. The two ends of the loop of the nickel-chromium heating sheet 2 are respectively connected to a nickel wire 3 through spot welding. The two nickel wires 3 serve as leads of the loop and extend outside the ceramic base 1.

[0021] The high temperature in the embodiment is understood as a temperature above 400 DEG C. Unlike ordinary brazing, the high-temperature-resistant composite heater in the embodiment uses spot welding to integrally connect the leads and the nickel-chromium heating sheet 2. The welding position of the nickel wire 3 lead and the nickel-chromium heating sheet 2 does not have additional soldering materials such as silver copper required in soldering, which is beneficial to the stability of the welding position and enhances the welding firmness of the lead compared with the soldering method, so that the high-temperature-resistant composite heater can be used at a temperature above 800 DEG C for a long time, and has a longer service life.

[0022] The shape of the nickel-chromium heating sheet 2 can be any one of a circle, an ellipse or a polygon. Preferably, the nickel-chromium heating sheet 2 in the embodiment is circular and has a circular hole in the center (when used for heating an electronic cigarette, the electronic cigarette is located in the circular hole in the center, and the circular center hole is beneficial to uniform heating of the electronic cigarette). The top surface of the ceramic base 1 is provided with an annular groove 11 matched with the shape of the nickel-chromium heating sheet 2. The nickel-chromium heating sheet 2 is located in the annular groove 11, and the two nickel wires 3 extend outside the ceramic base 1 from two notches 14 provided on the side surface of the annular groove 11. The edge of the circular nickel-chromium heating sheet 2 has no sharp structure such as an edge, and is not easy to be damaged during assembly. The two nickel wires 3 are welded on the same side of the loop of the nickel-chromium heating sheet 2.

[0023] In a specific structure, the ceramic base 1 comprises a bottom plate and a first limiting ring 12 and a second limiting ring 13 protruding upward from the top surface of the bottom plate. The first limiting ring 12 is located inside the second limiting ring 13, and the first limiting ring 12, the second limiting ring 13 and the bottom plate form the annular groove 11. The side surface of the second limiting ring 13 is provided with two notches 14 (or two holes) for the nickel wires 3 to extend out (or the notches 14 and the holes can also be provided on the bottom plate). According to actual needs, the nickel wires 3 can be bent to change the direction when extending out of the ceramic base 1.

[0024] The ceramic base 1 is provided with a ceramic cover plate 415. The bottom surface of the nickel-chromium heating sheet 2 is pasted to the bottom of the annular groove 11 through high-temperature-resistant glue. After the nickel-chromium heating sheet 2 is placed in the annular groove 11, the annular groove 11 is filled with high-temperature-resistant glue and the ceramic cover plate 415 is firmly pasted. The ceramic cover plate 415 covers the ceramic base 1 and seals the annular groove 11. After the glue is filled, the components are bonded to form a whole, ensuring the sealing performance.

[0025] Preferably, the bottom plate is provided with a center hole 15, the center hole 15 of the bottom plate is located inside the first limiting ring 12, the centers of the first limiting ring 12, the second limiting ring 13 and the center hole of the bottom plate coincide, which is beneficial to the uniform heating of the side wall of the center hole of the ceramic seat 1 by the nichrome heating sheet 2. When the high-temperature-resistant composite heater is used to heat the electronic cigarette, the electronic cigarette can be inserted into the center hole, so as to uniformly heat the electronic cigarette.

[0026] Nickel-chromium has excellent formability and is easy to process into various shapes. Unlike the paste pattern which needs to be printed on the cast sheet and then sintered before use, the nickel-chromium only needs to be cut into the designed shape and can be used. The stability of the nichrome heating sheet 2 is much higher than that of the heating sheet made of paste printing, and the resistance floating range is small. The heating sheet of the embodiment adopts nickel-chromium alloy material, has good corrosion resistance, wear resistance, thermal conductivity, good plasticity, and can maintain good strength and hardness in a high-temperature environment, so the nichrome heating sheet 2 is selected instead of printing the heating resistance paste on the cast sheet.

[0027] Manufacturing process: first, the nichrome heating sheet 2 is customized (the resistance can be customized according to requirements, and the finished resistance is stable), then the nickel wire 3 is welded, then the nickel wire 3 is bent to extend out of the ceramic seat 1 to meet the subsequent installation, the nichrome heating sheet 2 is installed into the ceramic seat 1, then the glue is poured and the ceramic cover plate 415 is sealed (the ceramic cover plate 415 is attached to the ceramic seat 1), and finally the glue is dried for 10 hours, which can sufficiently reduce the water content in the glue to ensure its adhesion and sealing. Preferably, the glue is inorganic high-temperature alumina powder glue.

[0028] The high-temperature-resistant composite heater of the embodiment adopts the nichrome heating sheet 2 and uses the nickel wire 3 as the lead, so the spot welding process can be used.

[0029] Spot welding has more advantages than ordinary brazing, the most important of which is the reduction of process complexity, small heat-affected zone and high welding strength. The spot welding process is simple, fast and suitable for mass production; the brazing process is relatively complex, which needs to control the temperature and the flow of the solder, and the welding speed is slow. The heat-affected zone of brazing is large, which may affect the performance of the material, while the heat-affected zone of spot welding is small, which usually has little effect on the performance of the material. In terms of welding strength, both are tested for tensile force in a normal temperature environment, and the welding strength of brazing is better than that of spot welding. However, this high-temperature-resistant composite heater is mainly used in electronic cigarettes, which requires high temperature but low tensile force, so good temperature resistance is more needed.

[0030] The above describes the embodiments only to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, therefore, all other embodiments obtained by the ordinary skilled in the art without creative labor, belong to the protection scope of the present application.

Claims

1. A high temperature resistant composite heater, characterized by, The ceramic base and the nickel-chromium heating sheet are arranged in the ceramic base, the nickel-chromium heating sheet is arranged in a hollow manner, and the non-hollow area of the nickel-chromium heating sheet forms a loop, two ends of the loop of the nickel-chromium heating sheet are connected with a nickel wire through spot welding, and the two nickel wires are used as the lead wires of the loop and extend out of the ceramic base.

2. The high temperature resistant composite heater of claim 1, wherein, The nickel-chromium heating sheet is circular and is provided with a circular hole in the center, the top surface of the ceramic base is provided with an annular groove matched with the shape of the nickel-chromium heating sheet, the nickel-chromium heating sheet is arranged in the annular groove, and the two nickel wires extend out of the ceramic base from two notches arranged on the side surface of the annular groove.

3. The high temperature resistant composite heater of claim 2, wherein, The ceramic base comprises a bottom plate and a first limiting ring and a second limiting ring which are formed by protruding upward from the top surface of the bottom plate, the first limiting ring is arranged inside the second limiting ring, and the first limiting ring, the second limiting ring and the bottom plate form the annular groove.

4. The high temperature resistant composite heater of claim 2 or 3, wherein, The ceramic base is provided with a ceramic cover plate, the bottom surface of the nickel-chromium heating sheet is pasted to the bottom of the annular groove through high-temperature resistant glue, the nickel-chromium heating sheet is poured and sealed in the annular groove through high-temperature resistant glue, and the ceramic cover plate is pasted to the annular groove, the ceramic cover plate covers the ceramic base and seals the annular groove.

5. The high temperature resistant composite heater of claim 4, wherein, The bottom plate is provided with a central circular hole, the central circular hole of the bottom plate is arranged inside the first limiting ring, and the centers of the first limiting ring, the second limiting ring and the central circular hole of the bottom plate coincide.

6. The high temperature resistant composite heater of claim 4, wherein, The high-temperature resistant glue is inorganic high-temperature alumina powder glue.

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