Aerosol generating device
By designing multiple heating modules in the aerosol generator device, ensuring that the airflow can be heated in multiple modules, the problem of uneven and unstable hot airflow in traditional devices is solved, and the quality of aerosol generation is improved.
Patent Information
- Application Number
- CN202420470672.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-12
AI Technical Summary
When traditional aerosol generators heat the air flow, the cold air flow can easily affect the heating module, resulting in uneven and unstable hot air flow, affecting the generation of aerosol.
An aerosol generator is designed, including a first and a second heating module. The airflow is first heated through the first heating module, and then enters the second heating module through the first air outlet and the second air inlet for further heating to ensure that the airflow can be heated to a preset temperature.
Through this design, the stability of the hot air flow is improved, the heating effect on the aerosol matrix is enhanced, and the quality of the aerosol generation is improved.
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Figure CN222548602U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of aerosol generating devices, and in particular to an aerosol generating device. Background Art
[0002] The aerosol generating device is used to generate aerosol from an aerosol matrix, and is usually used in the fields of electronic cigarettes, air purifiers, etc. In the process of generating aerosol, the aerosol generating device can heat the aerosol matrix through a hot air flow, so as to generate an aerosol from the aerosol matrix. In this process, when the traditional aerosol generating device heats the airflow, the cold airflow is likely to affect the heating module, resulting in failure to be heated to the preset temperature, that is, the hot air flow is prone to uneven and unstable phenomenon, which further leads to poor heating effect of the hot air flow on the aerosol matrix, affecting the generation of aerosol. Utility Model Content
[0003] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art and provide an aerosol generating device that can improve the stability of the hot air flow.
[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:
[0005] According to the embodiment of the present application, the aerosol generating device includes: a first heating module, the first heating module is provided with a first air inlet and a first air outlet, the first air inlet is connected to the first air outlet, and in a preset direction, the first air inlet is located behind the first air outlet; a second heating module, the second heating module is provided with a second air inlet and a second air outlet, the second air inlet is connected to the first air outlet, the second air outlet is connected to the second air inlet, in the preset direction, the second air outlet is located in front of the second air inlet, and the first air outlet is located behind the second air inlet; wherein, the airflow enters the first heating module from the first air inlet and flows along the preset direction.
[0006] According to the aerosol generating device of the embodiment of the present application, the aerosol generating device further includes a power supply module, and the first heating module and the second heating module are both electrically connected to the power supply module.
[0007] According to the aerosol generating device of the embodiment of the present application, the first heating module includes a first heating element, the first air inlet and the first air outlet are both opened on the first heating element, the first heating element is provided with a heating chamber, the first air inlet and the first air outlet are both connected to the heating chamber, and the first air inlet is arranged behind the heating chamber along the preset direction, and the first air outlet is arranged in front of the heating chamber along the preset direction.
[0008] According to the aerosol generating device of the embodiment of the present application, the first heating module further includes a first heating element, the first heating element is disposed in the heating chamber, and the power supply module is electrically connected to the first heating element.
[0009] According to the aerosol generating device of the embodiment of the present application, the second heating module includes a second heating element, the second heating element is provided with a plurality of heating through holes arranged at intervals, each of the heating through holes is extended along the preset direction, there are multiple second air inlets and second air outlets, and in the preset direction, the rear end of each of the heating through holes is connected to one of the second air inlets, and the front end of each of the heating through holes is connected to one of the second air outlets.
[0010] According to the aerosol generating device of the embodiment of the present application, the second heating module further includes a second heating element, the second heating element is in contact with the second heating element, and the second heating element is electrically connected to the power supply module.
[0011] According to the aerosol generating device of the embodiment of the present application, the aerosol generating device also includes a shell, the shell is provided with a third air inlet and a accommodating cavity, the first heating module, the second heating module and the power supply module are all arranged in the shell, the third air inlet is connected with the first air inlet, and the third air inlet is arranged behind the first air inlet along the preset direction, the accommodating cavity is connected with the second air outlet, and the accommodating cavity is arranged in front of the second air inlet along the preset direction.
[0012] According to the aerosol generating device of the embodiment of the present application, the aerosol generating device further includes a control module, the control module is disposed in the housing, and the control module is electrically connected to the power supply module.
[0013] According to the aerosol generating device of the embodiment of the present application, the control module includes an airflow sensing switch, the airflow sensing switch is located at the third air inlet, and the airflow sensing switch is electrically connected to the power supply module.
[0014] According to the aerosol generating device of the embodiment of the present application, the aerosol generating device also includes an isolation limiter, which is arranged in the outer shell, the isolation limiter is sealed and connected to the inner wall of the outer shell, and the isolation limiter is arranged between the first heating module and the second heating module, the isolation limiter is provided with a plurality of air holes, and the first air outlet is connected to any of the second air inlets through the plurality of air holes.
[0015] The aerosol generating device of the present application has the following advantages:
[0016] In the above-mentioned aerosol generating device, the airflow can enter the first heating module from the first air inlet to heat the airflow through the first heating module. In the process of the first heating module heating the airflow, the airflow entering the first heating module will affect the temperature of the first heating module, causing the temperature of the first heating module to drop, so that the airflow cannot be heated to the preset temperature. At this time, the airflow can continue to flow along the preset direction and enter the second heating module through the first air outlet and the second air inlet to further heat the airflow through the second heating module, so that the airflow can be heated to the preset temperature, thereby improving the stability of the hot airflow that heats the aerosol matrix, thereby improving the heating effect of the hot airflow on the aerosol matrix. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic cross-sectional view of the aerosol generating device of the present application is shown;
[0019] Figure 2 A schematic cross-sectional structure diagram of a first heating module of the present application is shown;
[0020] Figure 3 A schematic cross-sectional structure diagram of the second heating module and the isolation limiter of the present application is shown;
[0021] Figure 4 A schematic structural diagram of the isolation and limiting member of the present application is shown.
[0022] Description of main component symbols:
[0023] 100 - first heating module; 110 - first air inlet; 120 - first air outlet; 130 - first heating element; 131 - heating chamber; 140 - first heating element;
[0024] 200 - second heating module; 210 - second air inlet; 220 - second air outlet; 230 - second heating element; 231 - heating through hole; 240 - second heating element;
[0025] 300-power supply module;
[0026] 400-housing; 410-third air inlet; 420-accommodating chamber;
[0027] 500-control module; 510-air flow sensor switch;
[0028] 600-Isolation limiter; 610-Air hole. DETAILED DESCRIPTION
[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0034] Reference Figure 1 As shown, the aerosol generating device involved in the embodiment of the present application includes: a first heating module 100 and a second heating module 200.
[0035] Specifically, the first heating module 100 is provided with a first air inlet 110 and a first air outlet 120, the first air inlet 110 is connected with the first air outlet 120, and in a preset direction, the first air inlet 110 is located behind the first air outlet 120; the second heating module 200 is provided with a second air inlet 210 and a second air outlet 220, the second air inlet 210 is connected with the first air outlet 120, and the second air outlet 220 is connected with the second air inlet 210, in the preset direction, the second air outlet 220 is located in front of the second air inlet 210, and the first air outlet 120 is located behind the second air inlet 210; wherein, the air flow enters the first heating module 100 from the first air inlet 110 and flows along the preset direction.
[0036] It should be noted that the preset direction is Figure 1 The direction that x points to.
[0037] In the above-mentioned aerosol generating device, the airflow can enter the first heating module 100 from the first air inlet 110 to heat the airflow through the first heating module 100. During the process of the first heating module 100 heating the airflow, the airflow entering the first heating module 100 will affect the temperature of the first heating module 100, causing the temperature of the first heating module 100 to drop, so that the airflow cannot be heated to the preset temperature. At this time, the airflow can continue to flow along the preset direction and enter the second heating module 200 through the first air outlet 120 and the second air inlet 210 to further heat the airflow through the second heating module 200, so that the airflow can be heated to the preset temperature, thereby improving the stability of the hot airflow that heats the aerosol matrix, thereby improving the heating effect of the hot airflow on the aerosol matrix.
[0038] Continue to refer to Figure 1As shown, the aerosol generating device further includes a power supply module 300 , and the first heating module 100 and the second heating module 200 are both electrically connected to the power supply module 300 .
[0039] It can be understood that since the first heating module 100 and the second heating module 200 are both electrically connected to the power supply module 300, the first heating module 100 and the second heating module 200 can be powered by the power supply module 300, so that the first heating module 100 and the second heating module 200 are powered on and heated, thereby enabling the first heating module 100 and the second heating module 200 to heat the airflow.
[0040] Reference Figure 1 as well as Figure 2 As shown, the first heating module 100 includes a first heating element 130, a first air inlet 110 and a first air outlet 120 are both opened on the first heating element 130, the first heating element 130 is provided with a heating chamber 131, the first air inlet 110 and the first air outlet 120 are both connected to the heating chamber 131, and the first air inlet 110 is arranged behind the heating chamber 131 along a preset direction, and the first air outlet 120 is arranged in front of the heating chamber 131 along the preset direction.
[0041] It can be understood that since the first air inlet 110 and the first air outlet 120 are both connected to the heating chamber 131, and the first air inlet 110 is arranged at the rear of the heating chamber 131 along the preset direction, and the first air outlet 120 is arranged at the front of the heating chamber 131 along the preset direction, the airflow can enter the heating chamber 131 through the first air inlet 110, so that the airflow can be heated in the heating chamber 131. At the same time, the airflow in the heating chamber 131 can flow to the second heating module 200 via the first air outlet 120 to achieve reheating of the airflow, thereby improving the stability of the hot airflow that heats the aerosol matrix, thereby improving the heating effect of the hot airflow on the aerosol matrix.
[0042] Continue to refer to Figure 1 as well as Figure 2 As shown, the first heating module 100 further includes a first heating element 140 , which is disposed in the heating chamber 131 , and the power supply module 300 is electrically connected to the first heating element 140 .
[0043] Specifically, in the above embodiments, the material of the first heating element 130 can be ceramic, glass, fiber, metal, plastic, etc., and the shape of the first heating element 130 can be a cube, a rectangular parallelepiped, a cylinder, a triangular prism, a polyhedron, etc., so as to provide a certain thermal insulation effect for the heating chamber 131.
[0044] It can be understood that, since the first heating element 140 is arranged in the heating chamber 131, and the power supply module 300 is electrically connected to the first heating element 140, the first heating element 140 can be powered on and heated through the power supply module 300, so that the first heating element 140 can increase the temperature in the heating chamber 131, and further heat the first heating element 130, so that the first heating element 130 can provide insulation for the heating chamber 131 and the first heating element 140. At the same time, when the airflow enters the heating chamber 131, it can be heated by the first heating element 140 in the heating chamber 131, and can also be heated by the cavity wall of the heating chamber 131. However, when the airflow enters the heating chamber 131, it will also have a certain cooling effect on the heating chamber 131 and the first heating element 140. Therefore, the phenomenon of unstable hot air flow is prone to occur. At this time, the airflow can be further heated by the second heating module 200 to improve the stability of the hot air flow.
[0045] Specifically, in the above-mentioned embodiment, the edge of the first air inlet 110 is curved, the first heating element 140 is consistent with the shape of the edge of the first air inlet 110, and the first heating element 140 is located in front of the first air inlet 110 along a preset direction. In this way, the airflow can be broken up through the first air inlet 110 so that the airflow can be in a turbulent state, so that the airflow can be fully heated in the heating chamber 131, thereby improving the heating effect of the airflow in the first heating module 100. At the same time, the airflow entering through the first air inlet 110 can first contact the first heating element 140, which can further improve the heating effect of the airflow in the first heating module 100.
[0046] Reference Figure 1 as well as Figure 3 As shown, the second heating module 200 includes a second heating element 230, and the second heating element 230 is provided with a plurality of heating through holes 231 arranged at intervals, each heating through hole 231 is extended along a preset direction, and there are multiple second air inlets 210 and second air outlets 220. In the preset direction, the rear end of each heating through hole 231 is connected to a second air inlet 210, and the front end of each heating through hole 231 is connected to a second air outlet 220.
[0047] Specifically, in the above-mentioned embodiment, each second air inlet 210 is communicated with the first air outlet 120 .
[0048] It can be understood that the airflow flowing out of the first heating element 130 from the first air outlet 120 can enter each second air inlet 210, and enter the heating through hole 231 connected thereto through each second air inlet 210, so that the airflow can be heated in multiple heating through holes 231. In this process, the airflow can be further dispersed through multiple heating through holes 231, so that the airflow entering the second heating element 230 can be in a turbulent state, so that the airflow can be fully heated in the second heating element 230, thereby improving the heating effect of the airflow in the second heating module 200. At the same time, when the airflow flows out of the second air outlet 220 through multiple heating through holes 231, the airflow can be distributed more evenly, so that the aerosol matrix can be heated more evenly, further improving the heating effect of the aerosol matrix.
[0049] Continue to refer to Figure 1 as well as Figure 3 As shown, the second heating module 200 further includes a second heating element 240 , the second heating element 240 is in contact with the second heating element 230 , and the second heating element 240 is electrically connected to the power supply module 300 .
[0050] Specifically, in the above-mentioned embodiment, the second heating element 230 is a microporous ceramic heating element, which has countless small pores, has the effects of adsorption and emission, and has good heating effects. At the same time, the small pores of the microporous ceramic heating element can make the aerosol matrix evaporate more actively through heating. The shape of the second heating element 230 can be a cube, a cuboid, a cylinder, a triangular prism, a polyhedron, etc.
[0051] More specifically, in the above-mentioned embodiment, the second heating element 240 contacts the outer surface of the second heating element 230 . In addition, in other embodiments, the second heating element 240 may also be replaced on the surface of the second heating element 230 .
[0052] It can be understood that since the second heating element 240 is in contact with the second heating element 230 and the second heating element 240 is electrically connected to the power supply module 300, the second heating element 240 can be energized through the power supply module 300 so that the second heating element 240 is energized and generates heat, and further the second heating element 240 heats the first heating element 130 so that the first heating element 130 can generate heat. In this way, when the airflow flows through the multiple heating through holes 231, the airflow can be heated by the first heating element 130.
[0053] Reference Figure 1As shown, the aerosol generating device also includes a shell 400, the shell 400 is provided with a third air inlet 410 and a accommodating chamber 420, the first heating module 100, the second heating module 200 and the power supply module 300 are all arranged in the shell 400, the third air inlet 410 is connected with the first air inlet 110, and the third air inlet 410 is arranged behind the first air inlet 110 along the preset direction, the accommodating chamber 420 is connected with the second air outlet 220, and the accommodating chamber 420 is arranged in front of the second air inlet 210 along the preset direction.
[0054] It can be understood that the accommodating chamber 420 is used for placing the aerosol matrix. Since the third air inlet 410 is connected to the first air inlet 110, and the third air inlet 410 is arranged behind the first air inlet 110 along the preset direction, the accommodating chamber 420 is connected to the second air outlet 220, and the accommodating chamber 420 is arranged in front of the second air inlet 210 along the preset direction, therefore, the airflow can enter the above-mentioned aerosol generating device through the third air inlet 410, and flow through the first heating module 100 and the second heating module 200 in turn through the first air inlet 110, the first air outlet 120 and the second air inlet 210, and enter the accommodating chamber 420 through the second air outlet 220, so as to achieve the purpose of heating the aerosol matrix in the accommodating chamber 420.
[0055] Continue to refer to Figure 1 As shown, the aerosol generating device further includes a control module 500 , which is disposed in the housing 400 , and is electrically connected to the power supply module 300 .
[0056] It can be understood that since the control module 500 is electrically connected to the power supply module 300, the control module 500 can control the power supply module 300 to supply power to the first heating module 100 and the second heating module 200, so as to achieve the purpose of heating the airflow by the first heating module 100 and the second heating module 200.
[0057] Continue to refer to Figure 1 As shown, the control module 500 includes an airflow sensing switch 510 . The airflow sensing switch 510 is located at the third air inlet 410 , and the airflow sensing switch 510 is electrically connected to the power supply module 300 .
[0058] Specifically, in the above-mentioned embodiment, the airflow sensing switch 510 is a microphone airflow sensing switch 510 .
[0059] It can be understood that since the airflow sensing switch 510 is located at the third air inlet 410 and the airflow sensing switch 510 is electrically connected to the power supply module 300, when the airflow enters the aerosol generating device through the third air inlet 410, the airflow can first contact the airflow sensing switch 510, so that the airflow sensing switch 510 is triggered, and further the airflow sensing switch 510 controls the power supply module 300 to obtain power, so that the power supply module 300 can supply power to the first heating module 100 and the second heating module 200, thereby making the first heating module 100 and the second heating module 200 heat up, when the airflow enters the first heating module 100 and the second heating module 200, the airflow can be heated, when there is no airflow passing through the above-mentioned aerosol generating device, the airflow sensing switch 510 is in an off state, and at this time the power supply module 300 is also in an off state, which can extend the single service life of the power supply module 300.
[0060] Reference Figure 1 , Figure 3 as well as Figure 4 As shown, the aerosol generating device also includes an isolation limit member 600, which is arranged in the outer shell 400, and the isolation limit member 600 is sealed to the inner wall of the outer shell 400, and the isolation limit member 600 is arranged between the first heating module 100 and the second heating module 200. The isolation limit member 600 is provided with a plurality of air holes 610, and the first air outlet 120 is connected to any second air inlet 210 through the plurality of air holes 610.
[0061] It can be understood that, since the isolation limiter 600 is sealed and connected to the inner wall of the housing 400, and the isolation limiter 600 is arranged between the first heating module 100 and the second heating module 200, the isolation limiter 600 can isolate the first heating module 100 and the second heating module 200, and at the same time, it can also limit the second heating module 200, so that the first heating module 100 and the second heating module 200 can be spaced apart, and at the same time, it can also prevent the aerosol matrix in the accommodating cavity 420 from passing through the second heating module 200. The gap between the thermal module 200 and the outer shell 400 enters into the first heating module 100, the power supply module 300 and the control module 500, so as to avoid leakage of the aerosol matrix. Furthermore, since the isolation limit member 600 is provided with a plurality of air holes 610, the first air outlet 120 is connected with any second air inlet 210 through the plurality of air holes 610. Therefore, it is possible to ensure that the airflow in the first heating module 100 enters into the second heating module 200 through the isolation limit member 600, thereby avoiding interference of the isolation limit member 600 with the flow of the airflow.
[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. An aerosol generating device, characterized in that: include: A first heating module, wherein the first heating module is provided with a first air inlet and a first air outlet, the first air inlet is connected to the first air outlet, and in a preset direction, the first air inlet is located behind the first air outlet; a second heating module, wherein the second heating module is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the first air outlet, the second air outlet is communicated with the second air inlet, and in the preset direction, the second air outlet is located in front of the second air inlet, and the first air outlet is located behind the second air inlet; The airflow enters the first heating module from the first air inlet and flows along the preset direction.
2. The aerosol generating device according to claim 1, characterized in that: The aerosol generating device further comprises a power supply module, and the first heating module and the second heating module are both electrically connected to the power supply module.
3. The aerosol generating device according to claim 2, characterized in that: The first heating module includes a first heating element, the first air inlet and the first air outlet are both opened on the first heating element, the first heating element is provided with a heating chamber, the first air inlet and the first air outlet are both connected to the heating chamber, and the first air inlet is arranged behind the heating chamber along the preset direction, and the first air outlet is arranged in front of the heating chamber along the preset direction.
4. The aerosol generating device according to claim 3, characterized in that: The first heating module further includes a first heating element, which is disposed in the heating chamber, and the power supply module is electrically connected to the first heating element.
5. The aerosol generating device according to any one of claims 2 to 4, characterized in that: The second heating module includes a second heating element, which is provided with a plurality of heating through holes arranged at intervals, each of which extends along the preset direction, and there are multiple second air inlets and second air outlets. In the preset direction, the rear end of each heating through hole is connected to a second air inlet, and the front end of each heating through hole is connected to a second air outlet.
6. The aerosol generating device according to claim 5, characterized in that: The second heating module further includes a second heating element, the second heating element is in contact with the second heating element, and the second heating element is electrically connected to the power supply module.
7. The aerosol generating device according to any one of claims 2 to 4, characterized in that: The aerosol generating device also includes a shell, which is provided with a third air inlet and a accommodating chamber. The first heating module, the second heating module and the power supply module are all arranged in the shell. The third air inlet is connected with the first air inlet, and the third air inlet is arranged behind the first air inlet along the preset direction. The accommodating chamber is connected with the second air outlet, and the accommodating chamber is arranged in front of the second air inlet along the preset direction.
8. The aerosol generating device according to claim 7, characterized in that: The aerosol generating device further comprises a control module, which is disposed in the housing and is electrically connected to the power supply module.
9. The aerosol generating device according to claim 8, characterized in that: The control module includes an airflow sensing switch, which is located at the third air inlet and is electrically connected to the power supply module.
10. The aerosol generating device according to claim 7, characterized in that: The aerosol generating device also includes an isolation limiter, which is arranged in the shell, the isolation limiter is sealed to the inner wall of the shell, and the isolation limiter is arranged between the first heating module and the second heating module, the isolation limiter is provided with a plurality of air holes, and the first air outlet is connected to any of the second air inlets through the plurality of air holes.