Aluminum tube-free assembled heating element and electric mosquito-repellent incense burner

Abstract

The present invention discloses an aluminum tube-free assembled heating element and an electric mosquito-repellent incense burner, belonging to the technical field of electric mosquito-repellent incense burner heating elements, including a bipod, and also including: a ceramic body, which is installed on the bipod through a snap-fit ​​mechanism, and a heating cavity is provided on the ceramic body; a mounting cavity is provided on the bipod, and the top end faces the ceramic body; an elastic lower pole piece, which is installed at the bottom of the mounting cavity, and the elastic pole piece is provided with a first connecting pin extending outward; a PTC thermistor, which abuts against the upper end of the elastic pole piece; an upper pole piece, which abuts against the upper end of the PTC thermistor, and the top end of the upper pole piece abuts against the ceramic body, and the upper pole piece is provided with a second connecting pin extending outward. The aluminum tube-free assembled heating element and the electric mosquito-repellent incense burner disclosed in the present application have a relatively simple manufacturing process, and the stable installation of the heating element is achieved through the snap-fit ​​mechanism, and the heating of the far end of the ceramic body is achieved through the extension heater, which ensures the heating consistency and stability of the ceramic body.

Description

Technical Field

[0001] The present invention relates to the technical field of electric mosquito coil components, and in particular to an aluminum tube-free assembled heating element and an electric mosquito coil. The aluminum tube-free assembled heating element of the present application can be applied to various liquid volatilizers such as electric mosquito coils and electric perfume volatilizers. Background Art

[0002] At present, the heating elements of traditional electric mosquito coils mostly adopt the process of ceramic glue filling. The main process is to first weld two wires to the two poles of the PTC, then fill a proper amount of glue into the ceramic, insert the welded PTC into the ceramic, and then put the semi-finished product into an oven for drying. The dried ceramic is riveted to the plastic bipod and aluminum tube to make a finished heating element.

[0003] It is not difficult to see from the traditional electric mosquito coil heating element process that the overall process is relatively complicated, with many steps, and the temperature consistency of the heating element is the most important technical parameter for the electric mosquito coil heating element. The temperature consistency of the traditional heating element depends on factors such as the temperature error of the PTC, the formula of the glue, and the drying process. It is relatively difficult to control the temperature consistency of the traditional heating element, and the required temperature range is generally selected through subsequent temperature measurement.

[0004] The manufacturing process of the new assembled heating element is relatively simple compared to the traditional heating element. It only requires the PTC and two pole pieces to be installed into the two-legged frame, and then the whole is fastened to the ceramic. At the same time, the wires can be connected by riveting, plugging, spot welding, etc. The whole process is automatically assembled in one go using automated equipment, and the temperature consistency is relatively easy to control.

[0005] However, in the prior art, the ceramic body and the bipod are mainly fixed by aluminum tubes. When a structure without aluminum tubes is used, a more complex structure is required for the fixing method, which makes the assembly process more complicated. At the same time, when there is no aluminum tube, the heating uniformity of the ceramic body is poor.

[0006] Therefore, how to provide an aluminum tube-free assembled heating element and electric mosquito coil burner to improve the convenience of installation and uniform heating consistency is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0007] To this end, the present invention provides an aluminum tube-free assembled heating element and an electric mosquito-repellent incense burner to solve the related technical problems existing in the prior art.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] According to a first aspect of the present invention, there is provided an aluminum tube-free assembled heating element, comprising a two-legged stand and further comprising:

[0010] A ceramic body, mounted on the bipod through a snap-fit ​​mechanism, wherein a heating chamber is provided on the ceramic body;

[0011] A mounting cavity, disposed on the bipod, with a top end facing toward the ceramic body;

[0012] An elastic lower pole piece is installed at the bottom of the installation cavity, and the elastic pole piece is provided with a first connection pin extending outward;

[0013] A PTC thermistor abutting against the upper end of the elastic pole piece;

[0014] The upper pole piece is abutted against the upper end of the PTC thermistor, and the top end of the upper pole piece is abutted against the ceramic body. The upper pole piece is provided with a second connection pin extending outward.

[0015] Preferably, the buckling mechanism comprises:

[0016] The buckling teeth are symmetrically arranged on both sides of the installation cavity and extend toward the ceramic body;

[0017] The buckling grooves are symmetrically arranged on both sides of the ceramic body and are fixedly matched with the buckling teeth.

[0018] Preferably, it also includes:

[0019] A mounting groove, opposite to the mounting cavity and disposed on the ceramic body, wherein the upper pole piece is mounted in the mounting groove;

[0020] The outlet passages are symmetrically arranged on both sides of the installation groove, and the installation groove is communicated with the buckling groove through the outlet passages.

[0021] Preferably, it also includes:

[0022] An extended heating cavity is arranged in the ceramic body, and the extended heating cavity is arranged around the heating cavity, and two ends of the extended heating cavity are respectively connected to the buckling groove;

[0023] The extended heater is arranged in the extended heating cavity, and two ends of the extended heater are respectively passed through two ends of the extended heating cavity.

[0024] Preferably, two extended heating chambers are provided, and the two extended heating chambers are arranged axially along the heating chamber.

[0025] Preferably, the extension heater includes a heating wire, an extension sheet and an abutment sheet connected in sequence, the distal end of the heating wire is inserted into the extension heating cavity, the proximal end of the heating wire passes through the extension heating cavity and is connected to the extension sheet, the extension sheet is in the snap-fit ​​groove and is in friction contact with the snap-fit ​​teeth, the extension sheet is connected to the abutment sheet, the abutment sheet passes through the exit channel into the installation groove, and the abutment sheet is inserted between the PTC thermistor and the upper pole sheet.

[0026] Preferably, the two extension heaters are symmetrically arranged.

[0027] Preferably, a surface of the extension piece facing the locking teeth is rough.

[0028] Preferably, it further comprises a limiting mechanism, wherein the limiting mechanism comprises:

[0029] A limit groove is provided between the inner surface of the bipod and the buckling teeth;

[0030] A limit baffle, which is arranged at the rear side of the buckling groove on the ceramic body, and the limit baffle is integrally formed with the ceramic body;

[0031] When the buckling groove and the buckling teeth are matched, the limit baffle is inserted into the limit groove.

[0032] According to a second aspect of the present invention, there is provided an electric mosquito coil incense burner, comprising the aluminum tube-free assembled heating element as described above, and further comprising:

[0033] A base, on which the aluminum tube-free assembled heating element is fixed;

[0034] A cover, which is disposed on the base and is fixedly connected to the base;

[0035] An integrated switch is arranged at the front end of the base, a button is provided on the integrated switch, and the integrated switch is electrically connected to the aluminum tube-free assembled heating element through a wire;

[0036] The plug socket assembly is arranged at the rear end of the base, and the plug socket assembly is electrically connected to the integrated switch through a wire.

[0037] The present invention has the following advantages:

[0038] The aluminum tube-free assembled heating element is different from the traditional heating element. It only needs to install the PTC thermistor and two pole pieces into the two-legged frame, and then buckle the whole with the ceramic body. At the same time, the wires can be connected by riveting, plugging, spot welding, etc. The whole process is automatically assembled in one time using automated equipment. The key design principle of the aluminum tube-free assembled heating element is to completely fit the plane of one electrode of the PTC thermistor on the upper pole piece, and the upper pole piece is completely fitted on the surface of the ceramic body, and then the other electrode of the PTC thermistor is supported by an elastic lower pole piece. The heat of the PTC thermistor is mainly transferred to the ceramic body through the upper pole piece. The aluminum tube-free assembled heating element and electric mosquito coiler disclosed in the present application have a relatively simple manufacturing process, and the stable installation of the heating element is achieved through the buckling mechanism, and the heating of the far end of the ceramic body is achieved by extending the heater, which ensures the heating consistency and stability of the ceramic body. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0040] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0041] Figure 1 A schematic structural diagram of a first-viewing angle of view of an aluminum tube-free assembled heating element provided in Example 1 of the present invention;

[0042] Figure 2 A schematic structural diagram of a second viewing angle of an aluminum tube-free assembled heating element provided in Example 1 of the present invention;

[0043] Figure 3 An exploded diagram of an assembled heating element provided in Example 1 of the present invention;

[0044] Figure 4 A schematic diagram of an extended heating cavity and an extended heater on a ceramic body provided in Example 2 of the present invention;

[0045] Figure 5 A schematic cross-sectional view of a ceramic body provided in Example 2 of the present invention;

[0046] Figure 6A schematic diagram of disassembling the electric mosquito coil device provided in Embodiment 3 of the present invention;

[0047] In the figure:

[0048] 1. Bipod; 2. Ceramic body; 3. Heating cavity; 4. Mounting cavity; 5. Elastic lower pole piece; 6. PTC thermistor; 7. Upper pole piece; 8. First connecting pin; 9. Second connecting pin; 10. Fastening mechanism; 10. Fastening teeth; 10. Fastening groove; 11. Mounting groove; 12. Passageway; 13. Extended heating cavity; 14. Extended heater; 14. Heating wire; 14. Extended piece; 14. Abutting piece; 15. Limiting mechanism; 15. Limiting groove; 15. Limiting baffle; 16. Base; 17. Cover; 18. Integrated switch; 19. Plug socket assembly; 20. Button. DETAILED DESCRIPTION

[0049] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] In order to solve the problems of complicated installation process of assembled heating element and poor control of heating uniformity of heating chamber in the prior art, according to a first aspect of the present invention, an assembled heating element without aluminum tube is provided, including a two-legged stand 1, such as Figure 1 As shown, the bipod 1 is used to be installed in the electric mosquito coil device, and its structure is not described in detail, and it also includes:

[0052] The ceramic body 2 is mounted on the bipod 1 through a buckle mechanism 10. The ceramic body 2 is provided with a heating chamber 3. As shown in the figure, the heating chamber 3 is a circular chamber, and its axis direction is perpendicular to the bipod 1. At the same time, the buckle mechanism 10 is arranged on the side of the ceramic body 2 for buckling and fixing with the bipod 1.

[0053] Mounting cavity 4, such as Figure 2 As shown, it is arranged on the bipod 1, and the top end faces the ceramic body 2. In this embodiment, the installation cavity 4 is used to install the heating main structure, and specifically, the heating main structure includes:

[0054] The elastic lower pole piece 5 is installed at the bottom of the installation cavity 4, and is provided with a first connection pin 8 extending outward; specifically, in this embodiment, the elastic lower pole piece 5 is wavy, and when squeezed, its stretched state generates elastic force to abut against the PTC thermistor 6. As shown in the figure, a through hole is provided on the bipod 1, and the first connection pin 8 is passed outward from the through hole and connected to the wire.

[0055] A PTC thermistor 6, abutting against the upper end of the elastic pole piece;

[0056] The upper pole piece 7 is in contact with the upper end of the PTC thermistor 6, and the top of the upper pole piece 7 is in contact with the ceramic body 2. The upper pole piece 7 is provided with a second connecting pin 9 extending outward. As shown in the figure, a through hole is provided on the bipod 1, and the second connecting pin 9 is extended outward from the through hole and connected to the wire.

[0057] The aluminum tube-free assembled heating element of this embodiment, when used in an electric mosquito-repellent incense burner, can heat the mosquito-repellent incense liquid to promote volatilization, thereby achieving the effect of repelling and killing mosquitoes.

[0058] The key design principle of the new aluminum tube-free assembled heating element is to completely fit one electrode plane of the PTC thermistor 6 to the upper electrode piece 7, which is completely fitted on the surface of the ceramic body 2, and then support the other electrode of the PTC thermistor 6 through an elastic lower electrode piece 5, so that the PTC thermistor 6 is completely fitted with the upper electrode piece 7, and the upper electrode piece 7 is completely fitted with the ceramic body 2. The heat of the PTC thermistor 6 is mainly transferred to the ceramic body 2 through the upper electrode piece 7. Only when the PTC thermistor 6, the upper electrode piece 7 and the ceramic body 2 are completely fitted, the temperature consistency of the heating element can be guaranteed.

[0059] At the same time, compared with the traditional electric mosquito coil heater, the new assembled heating element has a simpler manufacturing process and fewer control points, and the stability and consistency of the heating element will be improved. Compared with the traditional electric mosquito coil heater, it does not have automatic PTC wire welding machines, ovens and other high-energy consumption equipment, and its corresponding manufacturing cost will be reduced, and the production operation will be simplified.

[0060] In the above embodiment, in order to achieve convenient and stable installation, a buckling mechanism 10 is provided. Specifically, the buckling mechanism 10 includes:

[0061] The snap-fit ​​teeth 101 are symmetrically arranged on both sides of the installation cavity 4 and extend toward the ceramic body 2; the snap-fit ​​grooves 102 are symmetrically arranged on both sides of the ceramic body 2 and are fixed with the snap-fit ​​teeth 101. As shown in the figure, the snap-fit ​​teeth 101 are inverted tooth structures, and the snap-fit ​​teeth 101 are hooked in the snap-fit ​​grooves 102 to achieve installation and fixation during installation.

[0062] At the same time, it also includes a limiting mechanism 15, such as Figure 2 and 3As shown in , the limiting mechanism 15 includes:

[0063] The limiting groove 151 is provided between the inner surface of the bipod 1 and the buckling teeth 101;

[0064] The limit baffle 152 is disposed at the rear side of the buckling groove 102 on the ceramic body 2, and the limit baffle 152 is integrally formed with the ceramic body 2;

[0065] When the buckling groove 102 and the buckling tooth 101 are matched, the limiting baffle 152 is inserted into the limiting groove 151 .

[0066] Specifically, during installation, the elastic lower pole piece 5, the PTC thermistor 6 and the upper pole piece 7 are first stacked in the installation cavity 4 in sequence, and then the upper limit baffle 152 of the ceramic body 2 is aligned with the direction of the limit groove 151, and the ceramic body 2 is pushed to slide along the direction of the limit groove 151. Finally, the locking tooth 101 is resisted and stretched open by the limit groove 151, and the push continues. When the lower end of the tooth body of the locking tooth 101 exceeds the upper end of the locking groove 102, the locked tooth 101 in the stretched state is tightened. At this time, the ceramic body 2 is slowly released, and under the upward elastic action of the elastic lower pole piece 5, the ceramic body 2 is pushed upward for a certain distance, so that the locking tooth 101 fits and snaps into the locking groove 102.

[0067] Example 2

[0068] On the basis of the above-mentioned embodiment, because it is an assembled heating element without aluminum tubes, when in use, in order to better achieve the uniformity of heat transfer of the ceramic body 2, the structure of the ceramic body 2 is improved.

[0069] Specifically, Figure 4 and 5 Also includes:

[0070] The mounting groove 11 is opposite to the mounting cavity 4 and is opened on the ceramic body 2, and the upper pole piece 7 is installed in the mounting groove 11; that is, the mounting groove 11 structure is opened on the ceramic body 2, which is exactly opposite to the structure of the mounting cavity 4. The purpose of this is to achieve a more stable installation of the elastic lower pole piece 5, the PTC thermistor 6 and the upper pole piece 7, and prevent the problem of poor contact caused by the shaking of the PTC thermistor 6.

[0071] The outlet passages 12 are symmetrically arranged on both sides of the mounting groove 11 , and the mounting groove 11 is communicated with the buckling groove 102 through the outlet passages 12 .

[0072] On the basis of the above structure, in order to achieve uniform heating at the far end of the ceramic body 2, it also includes:

[0073] The extended heating chamber 13 is arranged in the ceramic body 2, and the extended heating chamber 13 is arranged around the heating chamber 3, and the two ends of the extended heating chamber 13 are respectively connected to the snap-fit ​​grooves 102; specifically, the extended heating chamber 13 is a channel arranged around the heating chamber 3, and the extended heater 14 can be passed through it to bring heat to the far end of the ceramic body 2 through the extended heater 14.

[0074] The extension heater 14 is disposed in the extension heating cavity 13, and the two ends of the extension heater 14 are respectively passed through the two ends of the extension heating cavity 13. At the same time, it should be noted that the extension heater 14 can be moved in the extension heating cavity 13 as needed during installation and installed at a corresponding position.

[0075] Specifically, two extended heating chambers 13 are provided, and the two extended heating chambers 13 are arranged axially along the heating chamber 3. As shown in the figure, two extended heating chambers 13 are symmetrically arranged with respect to the heating chamber 3, and two extended heaters 14 are symmetrically arranged. One of the extended heaters 14 can heat from the left side, and the other extended heater 14 can heat from the right side, thereby ensuring the heating effect.

[0076] In this embodiment, the extended heater 14 includes a heating wire 141, an extension sheet 142 and an abutment sheet 143 connected in sequence. The distal end of the heating wire 141 is inserted into the extended heating cavity 13, and the proximal end of the heating wire 141 passes through the extended heating cavity 13 and is connected to the extension sheet 142. The extension sheet 142 is in the snap-fit ​​groove 102 and is in friction contact with the snap-fit ​​tooth 101. The extension sheet 142 is connected to the abutment sheet 143. The abutment sheet 143 passes into the installation groove 11 from the exit channel 12, and the abutment sheet 143 is inserted between the PTC thermistor 6 and the upper pole piece 7.

[0077] During specific use, the heating wire 141 is inserted into the extended heating cavity 13, and the position of the heating wire 141 can be moved as needed during actual installation; the extension sheet 142 can be integrated with the heating wire 141 or welded and fixed, mainly to establish a connection relationship between the heating wire 141 and the abutment sheet 143; the specific purpose of the abutment sheet 143 is to be inserted between the PTC thermistor 6 and the upper pole piece 7, so that the heat generated by the PTC thermistor 6 is transferred to the heating wire 141 through the extension sheet 142, and the heating wire 141 can heat the ceramic body 2 at the far end, and after the abutment sheet 143 takes away part of the heat, the heat of the upper pole piece 7 is relatively reduced. In this process, the heat generated by the PTC thermistor 6 can also be balanced, that is, part of the heat is also transferred to the proximal end of the ceramic body 2 through the upper pole piece 7, and the other part of the heat is transferred to the distal end of the ceramic body 2 through the extended heater 14.

[0078] Specifically, the side of the extension piece 142 facing the snap-fitting tooth 101 is a rough surface. During the specific installation, first, the elastic lower pole piece 5, the PTC thermistor 6 and the upper pole piece 7 are stacked in the installation cavity 4 in sequence, and then the upper limit baffle 152 of the ceramic body 2 is aligned with the direction of the limit groove 151, and the ceramic body 2 is pushed to slide along the direction of the limit groove 151. Finally, the snap-fitting tooth 101 is resisted and stretched open by the limit groove 151, and the push continues. When the lower end of the tooth body of the snap-fitting tooth 101 exceeds the upper end of the snap-fitting groove 102, the snap-fitting tooth 101 in the stretched state is tightened, and then the inclined surface of the snap-fitting tooth 101 is in friction contact with the rough surface of the extension piece 142. At this time, after slowly loosening the ceramic body 2, under the upward elastic action of the elastic lower pole piece 5, the ceramic body 2 is pushed upward for a certain distance, so that the snap-fitting tooth 101 is matched and buckled in the snap-fitting groove 102. During this process, the extension piece 142 is in the snap-fitting groove 102 and is in frictional contact with the snap-fitting tooth 101. When the snap-fitting tooth 101 moves in the snap-fitting groove 102, the extension piece 142 is connected to the abutment piece 143, and the abutment piece 143 passes through the exit channel 12 into the installation groove 11, and the abutment piece 143 is inserted between the PTC thermistor 6 and the upper pole piece 7.

[0079] Example 3

[0080] According to a second aspect of the present invention, an electric mosquito-repellent incense burner is provided, comprising the above-mentioned aluminum tube-free assembled heating element, such as Figure 6 , also includes:

[0081] A base 16, on which the aluminum tube-free assembled heating element is fixed;

[0082] A cover 17 is disposed on the base 16, and the cover 17 is fixedly connected to the base 16;

[0083] The integrated switch 18 is arranged at the front end of the base 16, and a button 20 is arranged on the integrated switch 18, and the integrated switch 18 is electrically connected to the aluminum tube-free assembled heating element through a wire;

[0084] The plug socket assembly 19 is disposed at the rear end of the base 16 , and the plug socket assembly 19 is electrically connected to the integrated switch 18 through a wire.

[0085] The above-mentioned base 16, cover 17, integrated switch 18, button 20, plug socket assembly 19 and other components are all common structures in the prior art and will not be described in detail here.

[0086] Compared with the traditional electric mosquito coil heater, the new aluminum tube-free assembled heating element has a simpler production process and fewer control points, and the stability and consistency of the heating element will be improved. Compared with the traditional electric mosquito coil heater, it does not have automatic PTC wire welding machines, ovens and other high-energy consumption equipment, and its corresponding manufacturing cost will be reduced, the production operation becomes simpler, and the material input and use are reduced, saving earth resources.

[0087] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An aluminum tube-free assembled heating element, comprising a two-legged stand, characterized in that: Also includes: A ceramic body, mounted on the bipod through a snap-fit ​​mechanism, wherein a heating chamber is provided on the ceramic body; A mounting cavity, disposed on the bipod, with a top end facing toward the ceramic body; An elastic lower pole piece is installed at the bottom of the installation cavity, and the elastic lower pole piece is provided with a first connection pin extending outward; A PTC thermistor abutting against the upper end of the elastic lower electrode; An upper pole piece is abutted against the upper end of the PTC thermistor, and the top end of the upper pole piece is abutted against the ceramic body, and the upper pole piece is provided with a second connecting pin extending outward; The buckling mechanism comprises: The buckling teeth are symmetrically arranged on both sides of the installation cavity and extend toward the ceramic body; The buckling grooves are symmetrically arranged on both sides of the ceramic body and are fixed with the buckling teeth; It also includes a limiting mechanism, which includes: A limit groove is provided between the inner surface of the bipod and the buckling teeth; A limit baffle, which is arranged at the rear side of the buckling groove on the ceramic body, and the limit baffle is integrally formed with the ceramic body; When the buckling groove and the buckling teeth are matched, the limit baffle is inserted into the limit groove.

2. The aluminum tube-free assembled heating element according to claim 1, characterized in that: Also includes: A mounting groove, opposite to the mounting cavity and disposed on the ceramic body, wherein the upper pole piece is mounted in the mounting groove; The outlet passages are symmetrically arranged on both sides of the installation groove, and the installation groove is communicated with the buckling groove through the outlet passages.

3. The aluminum tube-free assembled heating element according to claim 2, characterized in that: Also includes: An extended heating cavity is arranged in the ceramic body, and the extended heating cavity is arranged around the heating cavity, and two ends of the extended heating cavity are respectively connected to the buckling groove; The extended heater is arranged in the extended heating cavity, and two ends of the extended heater are respectively passed through two ends of the extended heating cavity.

4. The aluminum tube-free assembled heating element according to claim 3, characterized in that: The extended heating chambers are provided with two, and the two extended heating chambers are arranged axially along the heating chamber.

5. The aluminum tube-free assembled heating element according to claim 3, characterized in that: The extended heater includes a heating wire, an extension sheet and an abutment sheet connected in sequence, the distal end of the heating wire is inserted into the extended heating cavity, the proximal end of the heating wire passes through the extended heating cavity and is connected to the extension sheet, the extension sheet is in the snap-fit ​​groove and is in friction contact with the snap-fit ​​teeth, the extension sheet is connected to the abutment sheet, the abutment sheet passes through the installation groove from the exit channel, and the abutment sheet is inserted between the PTC thermistor and the upper electrode sheet.

6. The aluminum tube-free assembled heating element according to claim 5, characterized in that: The two extension heaters are symmetrically arranged.

7. The aluminum tube-free assembled heating element according to claim 5, characterized in that: A surface of the extension piece facing the locking teeth is a pitted surface.

8. Electric mosquito coil device, characterized in that: The aluminum tube-free assembled heating element according to any one of claims 1 to 7 further comprises: A base, on which the aluminum tube-free assembled heating element is fixed; A cover, which is disposed on the base and is fixedly connected to the base; An integrated switch is arranged at the front end of the base, a button is provided on the integrated switch, and the integrated switch is electrically connected to the aluminum tube-free assembled heating element through a wire; The plug socket assembly is arranged at the rear end of the base, and the plug socket assembly is electrically connected to the integrated switch through a wire.

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