Heating device and electronic cigarette

Abstract

The embodiment of the present application provides a heating device and an electronic cigarette, wherein the bracket of the heating component has a first end and a second end that are relatively arranged, the first end is provided with a storage groove, the heating component is arranged in the storage groove, the heating component is used to generate heat, the spacer cover is arranged on the heating component and is close to the first end, the temperature sensing element is arranged on the bracket, the temperature sensing element is in contact with the spacer, and the temperature sensing element is electrically connected to the heating component, wherein the temperature sensing element monitors the temperature of the heating component through the spacer and controls the heating of the heating component. When the heating component is working, the heat of the heating component will be transferred to the spacer covering the heating component, the spacer can transfer the heat to the temperature sensing element, the temperature sensing element can monitor the temperature of the heating component, and when the temperature sensing element detects that the temperature of the heating component exceeds a preset threshold, the heating component can be controlled to reduce or increase power to achieve a stable temperature adjustment for heating the cigarette.

Description

Technical Field

[0001] The present application relates to the technical field of smoking articles, and in particular to a heating device and an electronic cigarette. Background Art

[0002] With the development of society, people pay more and more attention to health. An important factor that causes cigarettes to harm health is the harmful substances produced when tobacco burns. Cigarettes are addictive and difficult to quit. In order to avoid the harm of cigarettes to health, some companies have developed electronic cigarettes. Electronic cigarettes have the taste of cigarettes, but they do not burn cigarettes and produce harmful substances.

[0003] Traditional electronic cigarette devices generally use a heating element to heat the cigarette. During the process of the heating element heating the cigarette, the temperature of the heating element cannot be fed back in real time. Summary of the invention

[0004] The embodiments of the present application provide a heating device and an electronic cigarette, which can provide real-time feedback on the temperature of a heating element.

[0005] The present application provides a heating device, comprising:

[0006] The bracket has a first end and a second end that are arranged opposite to each other, and the first end is provided with a receiving groove;

[0007] A heating component, the heating component is arranged in the receiving groove, and the heating component is used for generating heat;

[0008] A spacer, the spacer cover is disposed on the heating component and is close to the first end;

[0009] A temperature sensing element is disposed on the bracket, the temperature sensing element is in contact with the spacer, and the temperature sensing element is electrically connected to the heating component, wherein the temperature sensing element monitors the temperature of the heating component through the spacer and controls the heating of the heating component.

[0010] In some embodiments, the bracket includes a base and a protrusion, the protrusion extends upward from the base, the protrusion and the base form the storage groove, and a bayonet is provided on the protrusion, the bayonet is located at the first end, and the bayonet is used to clamp the temperature sensing element.

[0011] In some embodiments, the protrusion includes a first sub-protrusion and a second sub-protrusion, the first sub-protrusion and the second sub-protrusion form the storage groove, the bayonet is arranged on the outside of the first sub-protrusion close to the first end, and a through groove is provided on the outer side of the first sub-protrusion, and the through groove is used to avoid the connecting line of the temperature sensing element.

[0012] In some embodiments, the heating component includes a heating element and a heating cup, the heating cup is disposed in the storage groove, and the bottom of the heating cup is fixedly connected to the base, and the heating element is disposed in the heating cup.

[0013] In some embodiments, the spacer has a first surface and a second surface arranged opposite to each other, the first surface is provided with a first annular flange, the second surface is provided with a second annular flange, the second annular flange is embedded in the inner side of the heating cup to clamp the heating element in the heating cup, the spacer outside the second annular flange falls on the end of the heating cup close to the temperature sensing element, and the outer edge of the spacer is in contact with the temperature sensing element.

[0014] In some embodiments, at least two through holes are provided on the spacers within the first annular flange and the second annular flange.

[0015] In some embodiments, the spacer is made of metal or ceramic, and the thickness of the spacer is 0.5-1.0 mm.

[0016] In some embodiments, the inner wall edge of the first annular flange is arc-shaped, and the inner wall of the second annular flange is provided with at least two protrusions, and the protrusions are used to cooperate and fix with the heating element.

[0017] In some embodiments, the heating device also includes a cigarette cup, a metal tube, a sealing cover and an insulation tube. The cigarette cup is arranged on the first surface of the partition and is sleeved on the outer periphery of the first annular flange boss. The metal tube is sleeved on the outside of the cigarette cup. The insulation tube is fixed to the outside of the bracket, and the cigarette cup and the metal tube are stored inside the insulation tube. One end of the sealing cover extends into the insulation tube and is covered on one end of the cigarette cup and the metal tube away from the partition, and the other end cover is arranged on one end of the insulation tube away from the bracket. The inner wall of the insulation tube and the outer wall of the sealing cover and the cigarette cup form an annular closed air cavity.

[0018] An embodiment of the present application further provides an electronic cigarette, wherein the electronic cigarette comprises a heating device, and the heating device is the heating device described above.

[0019] The heating device provided in the embodiment of the present application includes a bracket, a heating component, a spacer and a temperature sensing element. The bracket has a first end and a second end that are arranged opposite to each other. The first end is provided with a storage groove. The heating component is arranged in the storage groove. The heating component is used to generate heat. The spacer is covered on the heating component and is close to the first end. The temperature sensing element is arranged on the bracket. The temperature sensing element is in contact with the spacer. The temperature sensing element is electrically connected to the heating component. The temperature sensing element monitors the temperature of the heating component through the spacer and controls the heating of the heating component. When the heating component is working, the heat of the heating component will be transferred to the spacer covering the heating component. The spacer can transfer the heat to the temperature sensing element. The temperature sensing element can monitor the temperature of the heating component. When the temperature sensing element detects that the temperature of the heating component exceeds a preset threshold, the heating component can be controlled to reduce or increase power to achieve a stable temperature adjustment for heating the cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a heating device provided in an embodiment of the present application.

[0022] Figure 2 A schematic diagram of the structure of the bracket provided in an embodiment of the present application.

[0023] Figure 3 This is a schematic diagram of the front structure of the spacer provided in an embodiment of the present application.

[0024] Figure 4 A schematic diagram of the back structure of the spacer provided in an embodiment of the present application.

[0025] Figure 5 Another schematic diagram of the structure of the heating assembly provided in an embodiment of the present application.

[0026] Figure 6 An electronic cigarette is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0028] It should be noted that, in the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In related electronic cigarettes, when people smoke by using electronic cigarettes, the air pressure in the inner cavity of the electronic cigarette will decrease, and cold air will enter from the bottom of the device and be heated to about 400°C when passing through the heating element composed of heating wires and microporous ceramics. When the gas continues to flow upward and passes through other objects, the heat will be absorbed by other objects, so the temperature gradually decreases. The farther the gas goes up from the heating element, the lower the temperature. The heated gas passes upward through the partition and then enters the inside of the cigarette to heat the tobacco. When the hot air enters the cigarette, the temperature is about 320°C, and this temperature needs to be maintained to stably extract nicotine from the tobacco.

[0030] Therefore, the following situations will cause the temperature of the air to be different after it is heated: (1) When the external environment temperature is different, the initial temperature of the inhaled air is different, and the power of the heating element is constant, so the temperature of the air after heating is also different. (2) When the air humidity is different, the amount of heat required to increase the temperature is also different, and the power of the heating element is constant, so the temperature of the air after heating is also different. (3) When people smoke cigarettes with different strengths, the air pressure in the device cavity decreases differently, resulting in different air flow rates. Then, the time it takes for the air to flow through the heating element and be heated is different, resulting in different air temperature rises.

[0031] Therefore, the amount of nicotine extracted will change, and the smoke temperature at the outlet will also be different, resulting in different smoking tastes and affecting user experience. In order to ensure the stability of air after heating, so as to ensure that the electronic cigarette can have a stable taste. In order to improve the problems in related electronic cigarettes, the embodiments of the present application provide a heating device and an electronic cigarette.

[0032] The embodiments of the present application provide a heating device and an electronic cigarette. The heating device is described in detail below.

[0033] See also Figure 1 , Figure 1A schematic diagram of the structure of a heating device provided in an embodiment of the present application. The heating device 10 provided in the embodiment of the present application includes a bracket 11, a heating component 12, a spacer 13 and a temperature sensing element 14, the bracket 11 has a first end 11a and a second end 11b arranged opposite to each other, the first end 11a is provided with a receiving groove 115, the heating component 12 is arranged in the receiving groove 115, the heating component 12 is used for generating heat, the spacer 13 is covered on the heating component 12 and is close to the first end 11a, the temperature sensing element 14 is arranged on the bracket 11, the temperature sensing element 14 is in contact with the spacer 13, and the temperature sensing element 14 is electrically connected to the heating component 12, wherein the temperature sensing element 14 monitors the temperature of the heating component 12 through the spacer 13 and controls the heating of the heating component 12.

[0034] It should be noted that the first end 11a may be the upper end of the bracket 11, and the second end 11b may be the lower end of the bracket 11. Of course, the first end 11a may also be the lower end of the bracket 11, and the second end 11b may be the upper end of the bracket 11. In the embodiment of the present application, unless otherwise specified, it is assumed that the first end 11a is the upper end of the bracket 11, and the second end 11b is the lower end of the bracket 11.

[0035] In addition, the storage groove 115 can be formed by the bracket 11 being recessed downward. Of course, the storage groove 115 can also be formed by the bracket 11 protruding a shielding portion downward, and the storage groove 115 is formed between the shielding portion and the bracket 11. The main function of the storage groove 115 is to store the heating component 12. Therefore, the storage space of the storage groove 115 can store the heating component 12. Of course, in order to better adapt to the heating component 12, the shape of the storage groove 115 can be adapted to the structure of the heating component 12.

[0036] In addition, the heating component 12 is used for generating heat, and the heating component 12 may include a heating wire, a heating body 121, etc. The heating wire and the heating body 121 may generate heat through the action of electric current, and after the heating wire or the heating body 121 generates heat, the heat may be transferred to the spacer 13, and then the cigarette may be heated through the spacer 13. In addition, the material of the heating body 121 may be one or a combination of more than one of ceramics, silicon dioxide, aluminum oxide, silicon nitride, zirconium oxide, silicon carbide, ore, and graphene.

[0037] In addition, the temperature sensing element 14 may include a temperature sensor and a processor. When the heating component 12 generates heat, the heat is transferred to the spacer 13, and the spacer 13 is in contact with the temperature sensing element 14. That is, the temperature sensor can monitor the temperature transferred from the spacer 13, thereby monitoring the temperature of the heating component 12 in real time. When the monitored temperature is unstable or exceeds a preset threshold, the processor can adjust the current of the heating component 12, thereby adjusting the heating temperature of the heating wire or the heating body 121, to ensure that the temperature of the heated cigarette is kept within a stable range.

[0038] See also Figure 2 , Figure 2 A schematic diagram of the structure of a bracket provided in an embodiment of the present application. The bracket 11 includes a base 111 and a protrusion 112, wherein the protrusion 112 extends upward from the base 111, the protrusion 112 and the base 111 form the receiving groove 115, and a bayonet 113 is provided on the protrusion 112, the bayonet 113 is located at the first end 11a, and the bayonet 113 is used to clamp the temperature sensing element 14.

[0039] It should be noted that the material used for the bracket 11 is a high temperature resistant plastic, such as polyphenylene sulfone resin. Of course, the bracket 11 can also be made of other high temperature resistant materials. For example, one or a combination of stainless steel, glass fiber, ceramic fiber, and thermal insulation aerogel. It is understandable that the bracket 11 can be made of a variety of materials.

[0040] In addition, the protrusion 112 may be an annular flange extending upward from the base 111, and the annular flange and the base 111 form a receiving groove 115. Of course, the protrusion 112 may include multiple protrusions 112, and the multiple protrusions 112 extend upward from the base 111, and the protrusion 112 and the base 111 form a receiving groove 115. Specifically, a bayonet 113 is provided on the outer side of the protrusion 112, and the shape of the bayonet 113 is adapted to the shape of the temperature sensing element 14. The bayonet 113 can clamp the temperature sensing element 14.

[0041] It is understandable that in order to better clamp the temperature sensing element 14 , the aperture of the bayonet 113 is retractable, and when the bayonet 113 contracts, the aperture of the bayonet 113 can be smaller than the temperature sensing element 14 , so that the temperature sensing element 14 and the bayonet 113 have an interference fit, thereby enabling the bayonet 113 to clamp the temperature sensing element 14 .

[0042] In addition, the base 111 and the protrusion 112 may be integrally formed, or the base 111 and the protrusion 112 may be connected via a connecting component.

[0043] In the embodiment of the present application, the temperature sensing element 14 is clamped by the bayonet 113 , and because the bayonet 113 is located at one end close to the spacer 13 , the spacer 13 is convenient to contact with the temperature sensing element 14 , which is beneficial to monitor the temperature of the heating component.

[0044] Among them, the protrusion 112 includes a first sub-protrusion 1121 and a second sub-protrusion 1122, the first sub-protrusion 1121 and the second sub-protrusion 1122 form the storage groove 115, the bayonet 113 is arranged on the outer side of the first sub-protrusion 1121 close to the first end 11a, and a through groove 114 is provided on the outer side of the first sub-protrusion 1121, and the through groove 114 is used to avoid the connecting line 141 of the temperature sensing element 14.

[0045] It should be noted that the first sub-protrusion 1121 and the second sub-protrusion 1122 are arranged opposite to each other, and the shapes of the first protrusion 1121 and the second sub-protrusion 1122 are trapezoidal. The height of the first sub-protrusion 1121 is higher than that of the second sub-protrusion 1122.

[0046] In the embodiment of the present application, the receiving groove 115 is formed by the first sub-protrusion 1121 and the second sub-protrusion 1122, so that the heating component can be confined in the receiving groove 115 without wasting too much material. At the same time, a through groove 114 is provided on the outside of the first sub-protrusion 1121, and the through groove 114 can avoid the connecting wire 141 of the temperature sensing element 14, so that the connecting wire 141 of the temperature sensing element 14 can be protected.

[0047] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of the front structure of a spacer is provided for an embodiment of the present application. Figure 4 A schematic diagram of the back structure of the spacer is provided for the embodiment of the present application. The spacer 13 has a first surface 13a and a second surface 13b arranged opposite to each other, the first surface 13a is provided with a first annular flange 131, the second surface 13b is provided with a second annular flange 132, the second annular flange 132 is embedded in the inner side of the heating cup 122 to clamp the heating element 121 in the heating cup 122, the spacer 13 outside the second annular flange 132 falls on the end of the heating cup 122 close to the temperature sensing element 14, and the outer edge of the spacer 13 is in contact with the temperature sensing element 14.

[0048] It should be noted that the first surface 13a may be the upper end surface of the spacer 13, and the second surface 11b may be the lower end surface of the spacer 13. Of course, the first surface 13a may also be the lower end surface of the spacer 13, and the second surface 13b may be the upper end surface of the spacer 13. In the embodiment of the present application, unless otherwise specified, it is assumed that the first surface 13a is the upper end surface of the spacer 13, and the second surface 13b is the lower end surface of the spacer 13.

[0049] In the embodiment of the present application, the spacer 13 outside the second annular flange 132 falls on the end of the heating cup 122 close to the temperature sensing element 14, and the outer edge of the spacer 13 contacts the temperature sensing element 14. This can facilitate the heat of the heating component 12 to be transferred to the temperature sensing element 14 through the spacer 13, thereby improving the temperature sensitivity of the temperature sensing element 14.

[0050] Therein, at least two through holes 133 are provided on the spacer 13 inside the first annular flange 131 and the second annular flange 132 .

[0051] It should be noted that the provision of the through hole 133 on the spacer 13 can facilitate the transfer of heat from the heating component 12 to the cigarette, thereby facilitating the heating of the cigarette.

[0052] Specifically, five through holes 133 are provided on the spacer 13 within the first annular flange 131 and the second annular flange 132. The five through holes 133 have the same diameter and are arranged in a ring shape. With this structural design, when the heat of the heating component is transferred to the cigarette through the spacer 13, the heat can be evenly transferred, so that the cigarette can be evenly burned.

[0053] More specifically, the spacer 13 in the first annular flange 131 and the second annular flange 132 is provided with a through hole 133, and the opening rate of the through hole 133 is more than 50%. For example, 50%, 60% and 70%. The opening rate of the through hole 133 in the heat insulation sheet is more than 50%, which can ensure the heat flux of the heating component, thereby ensuring the heat transfer efficiency and reducing the power consumption.

[0054] The spacer 13 is made of metal or ceramic, and has a thickness of 0.5-1.0 mm.

[0055] It should be noted that the thickness of the spacer 13 can be 0.5 mm, 0.7 mm, 1.0 mm, etc. In the embodiment of the present application, the thickness of the spacer 13 is limited to 0.5-1.0 mm, so as to ensure that the spacer 13 has good thermal conductivity.

[0056] The inner wall edge of the first annular flange 131 is arc-shaped, and the inner wall of the second annular flange 132 is provided with at least two protrusions 134 , and the protrusions 134 are used to cooperate and fix with the heating element 121 .

[0057] It should be noted that the inner wall of the second annular flange 132 is provided with four protrusions 134, and the four protrusions 134 are evenly arranged. This structure can better cooperate and fix with the heating element 121, making the heating element 121 less prone, so that the heating element 121 can generate heat at a higher temperature.

[0058] See also Figure 5 , Figure 5 Another structural schematic diagram of the heating assembly provided in the embodiment of the present application. The heating device 10 further includes a cigarette cup 15, a metal tube 16, a sealing cover 17 and an insulation tube 18, wherein the cigarette cup 15 is arranged on the first surface 13a of the spacer 13 and is sleeved on the outer periphery of the first annular flange 131, the metal tube 16 is sleeved on the outside of the cigarette cup 15, the insulation tube 18 is fixed on the outside of the bracket 11, and the cigarette cup 15 and the metal tube 16 are stored inside the insulation tube 18, one end of the sealing cover 17 extends into the insulation tube 18 and covers one end of the cigarette cup 15 and the metal tube 16 away from the spacer 13, and the other end is covered on one end of the insulation tube 18 away from the bracket 11, and the inner wall of the insulation tube 18 and the outer wall of the sealing cover 17 and the cigarette cup 15 form an annular closed air cavity.

[0059] It should be noted that the sealing cover 17 and the inner wall of the cigarette cup 15 can form a storage cavity, and the storage cavity can be used to place cigarettes. After the heating component is heated, the heat is transferred to the cigarettes through the spacer 13, thereby heating the cigarettes.

[0060] In the embodiment of the present application, the inner wall of the insulation tube 18 and the outer walls of the sealing cover 17 and the cigarette cup 15 form an annular closed air cavity for insulation. At the same time, the insulation tube 18 can also be insulated to avoid scalding the user.

[0061] The heating component 12 includes a heating element 121 and a heating cup 122 . The heating cup 122 is disposed in the receiving groove 115 , and the bottom of the heating cup 122 is fixedly connected to the base 111 . The heating element 121 is disposed in the heating cup 122 .

[0062] It should be noted that the heating cup 122 has a storage space, and the heating element 121 is arranged in the storage space of the heating cup 122. The bottom of the heating cup 122 and the base 111 can be fixedly connected by screws. Of course, the bottom of the heating cup 122 and the base 111 can also be fixedly connected by gluing or snapping.

[0063] In the embodiment of the present application, the heating element 121 is disposed in the heating cup 122, and the heating cup 122 can isolate the heat of the heating element 121, thereby preventing the heat of the heating element 121 from being conducted to the outside, thereby preventing the user from being burned when using the electronic cigarette 100 equipped with the heating device 10 in the embodiment of the present application.

[0064] The heating device 10 provided in the embodiment of the present application includes a bracket 11, a heating component 12, a spacer 13 and a temperature sensing element 14. The bracket 11 has a first end 11a and a second end 11b that are arranged opposite to each other. The first end 11a is provided with a storage groove 115. The heating component 12 is arranged in the storage groove 115. The heating component 12 is used for generating heat. The spacer 13 covers the heating component 12 and is close to the first end 11a. The temperature sensing element 14 is arranged on the bracket 11. The temperature sensing element 14 is in contact with the spacer 13. The temperature sensing element 14 is electrically connected to the heating component 12, wherein the temperature sensing element 14 monitors the temperature of the heating component 12 through the spacer 13 and controls the heating of the heating component 12. When the heating component 12 is working, the heat of the heating component 12 will be transferred to the partition 13 covering the heating component 12, and the partition 13 can transfer the heat to the temperature sensing element 14. The temperature sensing element 14 can monitor the temperature of the heating component 12. When the temperature sensing element 14 detects that the temperature of the heating component 12 exceeds a preset threshold, the heating component 12 can be controlled to reduce or increase the power to achieve a stable temperature for heating the cigarette.

[0065] See also Figure 6 , Figure 6 An electronic cigarette is provided in an embodiment of the present application. The electronic cigarette 100 provided in an embodiment of the present application includes a heating device 10 and a processing chip, wherein the heating device 10 is connected to the processing chip 20, and the processing chip 20 can control the heating device to generate heat, wherein the heating device 10 is the heating device 10 described in the above embodiment. Since the heating device 10 has been described in detail in the above embodiment, the heating device 10 is not described in detail in the embodiment of the present application.

[0066] When the heating component 12 is working, the heat of the heating component 12 will be transferred to the partition 13 covering the heating component 12. The partition 13 can transfer the heat to the temperature sensing element 14. The temperature sensing element 14 can monitor the temperature of the heating component 12. When the temperature sensing element 14 detects that the temperature of the heating component 12 exceeds a preset threshold, the processing chip 20 can control the heating component 12 to reduce or increase the power to achieve a stable temperature for heating the cigarette.

[0067] The above is a detailed introduction to the heating device and the electronic cigarette provided by the embodiments of the present application. The principles and implementation methods of the present application are described in detail using specific examples herein. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A heating device, characterized in that: include: A bracket, the bracket having a first end and a second end arranged opposite to each other, the first end being provided with a receiving groove; A heating component, the heating component is arranged in the receiving groove, and the heating component is used for generating heat; A spacer, the spacer cover is arranged on the heating component and is close to the first end, the spacer has a first surface and a second surface which are arranged opposite to each other, and the spacer is provided with at least two through holes; A temperature sensing element, the temperature sensing element is arranged on the bracket, the temperature sensing element is in contact with the spacer, the temperature sensing element is electrically connected to the heating component, wherein the temperature sensing element monitors the temperature of the heating component through the spacer and controls the heating of the heating component, the temperature sensing element includes a temperature sensor and a processor; The bracket includes a base and a protruding portion, the protruding portion extends upward from the base, the protruding portion and the base form the receiving groove, and a bayonet is provided on the protruding portion, the bayonet is located at the first end, and the bayonet is used to clamp the temperature sensing element; The heating device further comprises a cigarette cup, and the cigarette cup is arranged on the first surface of the partition.

2. The heating device according to claim 1, characterized in that The protrusion includes a first sub-protrusion and a second sub-protrusion, the first sub-protrusion and the second sub-protrusion form the storage groove, the bayonet is arranged on the outer side of the first sub-protrusion close to the first end, and a through groove is provided on the outer side of the first sub-protrusion, and the through groove is used to avoid the connecting line of the temperature sensing element.

3. The heating device according to claim 1, characterized in that: The heating component comprises a heating element and a heating cup. The heating cup is arranged in the storage groove, and the bottom of the heating cup is fixedly connected to the base. The heating element is arranged in the heating cup.

4. The heating device according to claim 3, characterized in that: The first surface is provided with a first annular flange, and the second surface is provided with a second annular flange. The second annular flange is embedded in the inner side of the heating cup to clamp the heating element in the heating cup. The spacer on the outer side of the second annular flange falls on the end of the heating cup close to the temperature sensing element, and the outer edge of the spacer is in contact with the temperature sensing element.

5. The heating device according to claim 4, characterized in that: The material of the spacer is metal or ceramic, and the thickness of the spacer is 0.5-1.0 mm.

6. The heating device according to claim 4, characterized in that: The inner wall edge of the first annular flange is arc-shaped, and the inner wall of the second annular flange is provided with at least two protrusions, and the protrusions are used to cooperate and fix with the heating element.

7. The heating device according to claim 4, characterized in that: The heating device also includes a metal tube, a sealing cover and an insulation tube. The cigarette cup is sleeved on the outer periphery of the first annular flange boss, the metal tube is sleeved on the outside of the cigarette cup, the insulation tube is fixed to the outside of the bracket, and the cigarette cup and the metal tube are stored inside the insulation tube. One end of the sealing cover extends into the insulation tube and covers one end of the cigarette cup and the metal tube away from the partition, and the other end cover is arranged on the end of the insulation tube away from the bracket. The inner wall of the insulation tube and the outer wall of the sealing cover and the cigarette cup form an annular closed air cavity.

8. An electronic cigarette, characterized in that: The electronic cigarette comprises a heating device, and the heating device is the heating device according to any one of claims 1 to 7.

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