Heating module and aerosol generating device

Abstract

The present application relates to a heating module (2) and an aerosol generating device, the heating module (2) comprising: a tubular body (21) having a receiving cavity formed therein, part of which is used to receive an aerosol-generating product (1) and part of which is used to receive a porous body (22), where air passes through a void inside the porous body (22) and then enters the inside of the aerosol-generating product (1), and a heater (23) arranged on a side of the tubular body (21) and including a first heating area (231) and a second heating area (232), the first heating area (231) being provided in correspondence with the outer periphery of the aerosol-generating product (1) and being used to heat or keep the aerosol-generating product (1) warm, and the second heating area (232) being provided in correspondence with the outer periphery of the porous body (22) and being used to heat the porous body (22).

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application filed with the China Patent Office on April 30, 2022, bearing application number 202221035011.X and entitled "Heating module and aerosol generating device", the entire contents of which are incorporated herein by reference.

[0002] TECHNICAL FIELD The embodiments of the present application relate to the technical field of aerosol generation, and in particular to a heating module and an aerosol generating device. [Background technology]

[0003] Existing aerosol generating devices typically include a heater that heats an aerosol generating product to generate an aerosol.

[0004] The heater in some aerosol generating devices is a porous body. The porous body can heat the air entering the aerosol generating product to form hot air. Due to the fluidity of the air, the hot air can be uniformly distributed in the aerosol generating product after entering the aerosol generating product, so that the aerosol generating product can be baked uniformly.

[0005] However, while the hot air flows through the interior of the sol-generating product, its temperature drops rapidly due to heat exchange with the aerosol-generating product, so that at least the downstream aerosol-generating product cannot be baked sufficiently. Summary of the Invention

[0006] The embodiment of the present application provides a heating module and an aerosol-generating device, in which the second heating area heats the air flowing through the second heating area by the porous body, and the first heating area can heat or keep warm the aerosol-generating product in the first containing cavity, which can prevent the temperature of the air inside the aerosol-generating product from decreasing, and is helpful in providing a heating effect to the aerosol-generating product.

[0007] The heating module provided in the embodiments of the present application comprises: a tubular body having a receiving cavity formed therein, a portion of which is used to receive the aerosol-generating product and a portion of which is used to receive a porous body, a tubular body through which air passes through voids within the porous body and then into the interior of the aerosol-generating product; a heater arranged on a side of the tubular body and including a first heating area and a second heating area, wherein the first heating area is provided corresponding to the outer periphery of the aerosol-generating product and is used to heat or keep the aerosol-generating product warm, and the second heating area is provided corresponding to the outer periphery of the porous body and is used to heat the porous body.

[0008] The aerosol generating device provided in the embodiments of the present application comprises the heating module.

[0009] In the above-mentioned heating module and aerosol generating device, the first heating area heats or keeps warm the aerosol-generating product in the receiving cavity, and the second heating area heats the porous body in the receiving cavity, and further heats the air flowing inside the porous body to form hot air entering the aerosol-generating product. On the one hand, the design of the first heating area and the second heating area can slow down the temperature drop rate of the hot air in the aerosol-generating product, so that the aerosol-generating product can be more fully heated by the hot air, so that the aerosol-generating product can be more fully utilized to prevent the aerosol-generating product from being wasted, and can also prevent the aerosol generated from the aerosol-generating product from condensing in the aerosol-generating product, thereby preventing clogging of the aerosol-generating product. On the other hand, by arranging the heater only in the tubular body, not only can air heating be performed on the aerosol-generating product by the porous body, but the aerosol-generating product can also be heated or kept warm by heat transfer or radiation, resulting in no need to arrange a heating circuit in the porous body, no need to electrically connect the porous body to an element having a conductive connection function such as a wire, and no need to add an auxiliary element for heating the porous body, thus simplifying the structure and being advantageous for maintaining the porous body inside the tubular body. [Brief description of the drawings]

[0010] One or more embodiments are illustratively described in corresponding drawing figures, but these illustrative descriptions are not intended to be limiting of the embodiments, in which elements having the same reference numbers in the drawings represent similar elements, and the drawings are not intended to be drawn to scale unless otherwise specified. [Figure 1] FIG. 1 is a schematic diagram of an aerosol generating device provided in one embodiment of the present application. [Diagram 2] FIG. 2 is a schematic diagram of a heating module provided in one embodiment of the present application. [Diagram 3] FIG. 2 is another schematic diagram of a heating module provided in an embodiment of the present application. [Figure 4] FIG. 2 is an exploded schematic view of a heating module provided in another embodiment of the present application. [Diagram 5] FIG. 2 is a schematic diagram of a heating module provided in another embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Of course, the described embodiments are only a part of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort shall fall within the scope of protection of the present application.

[0012] The terms "first", "second", and "third" in this application are for illustrative purposes only and should not be understood as indicating or implying relative importance or implying the number or order of the indicated technical features. All directional indications in the examples of this application (e.g., up, down, left, right, front, back...) are only for interpreting the relative positional relationship, movement situation, etc. between each member in a certain position (as shown in the drawings), and when the specific position changes, the directional indications change accordingly. In addition, the terms "comprise", "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or apparatus.

[0013] An "embodiment" referred to in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The term appears in various places in the specification not necessarily all referring to the same embodiment, nor does it refer to an embodiment that is exclusively independent of or in place of other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in this specification can be combined with other embodiments.

[0014] It should be noted that when an element is said to be "fixed" to another element, the element may be directly located on the other element, or there may be intervening elements. When an element is said to be "connected" to another element, the element may be directly connected to the other element, or there may simultaneously be one or more intervening elements between them. The terms "vertical," "horizontal," "left," "right," and similar terms used herein are for illustrative purposes only and do not represent the only embodiments.

[0015] One embodiment of the present application provides an aerosol generating device that can be used to heat an aerosol generating product to volatilize an aerosol for inhalation from the aerosol generating product, which may include flavoring substances such as herbal medicines, nicotine, or tobacco flavorings.

[0016] In an embodiment as shown in FIG. 1, the aerosol generating device comprises a receiving cavity for receiving an aerosol generating product 1, a heating module 2 for heating the aerosol generating product, and further comprises a power supply component 3 for providing power for the operation of the heating module 2.

[0017] With reference to FIG. 1, the aerosol generating device has an insertion port for an aerosol-generating product 1, such as a cigarette, to be removably received in the receiving cavity. The heating module 2, at least a portion of which extends longitudinally within the receiving cavity, generates heat by electromagnetic induction in a changing magnetic field, or generates heat by resistance when current is applied, or radiates infrared radiation to the aerosol-generating product when induction is applied, and further heats the aerosol-generating product 1, such as a cigarette, and volatilizes at least one component of the aerosol-generating product 1 to form an aerosol for inhalation. The power supply component 3 includes a battery cell 31, which is a rechargeable DC battery cell capable of outputting a DC current. In other embodiments, the battery cell 31 may be a disposable battery that is not rechargeable or does not need to be recharged. In other embodiments, the power supply component 3 may be a wired power supply that is directly connected to utility power by a plug to power the aerosol generating device.

[0018] In an alternative embodiment, the DC supply voltage provided by the battery cells 31 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current capable of being provided by the battery cells 31 is in the range of about 2.5A to about 20A.

[0019] The power of the power supply component 3 can be supplied to the heating module 2 as a pulsed signal, and the amount of power transferred to the heating module 2 can be adjusted by varying the duty cycle, the pulse width, or the pulse amplitude of the power signal.

[0020] The aerosol generating device further comprises a controller 32 which may be provided on the circuit board. The aerosol generating device comprises an insertion detector and a user interface (e.g., a graphic display or a combination of LED indicators, etc.) for communicating information about the aerosol generating device to a user.

[0021] The insertion detector can detect the presence and characteristics of an aerosol-generating product in the heat transfer path adjacent the heating module 2 and send a signal of the presence of the aerosol-generating product 1 to the controller 32. It will be appreciated that the provision of an insertion detector is optional, but not required.

[0022] The controller 32 controls the user interface to display system information such as, for example, the power of the battery cell 31, the temperature, the status of the aerosol generating product 1, the number of puffs, other information, or a combination thereof.

[0023] The controller 32 is electrically connected to the battery cell 31 and the heating module 2, and is used to control the output of current, voltage or power from the battery cell 31 to the heating module 2, etc.

[0024] The controller 32 may include a programmable microprocessor. In another embodiment, the controller 32 may include a dedicated electronic chip, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). In general, any device capable of providing a signal capable of controlling the heating module 2 may be used with the embodiments described herein. In one embodiment, the controller 32 is configured to detect a rate of temperature change of the actual temperature of the heating module 2 relative to a target temperature to detect and indicate a user inhale event.

[0025] The controller 32 may include a storage component, which may include a memory and / or a buffer. The storage component may be configured to record changes in the detected airflow or the user's inhalations. The storage component may record the count of the user's inhalations, or the time of each inhalation. The storage component may be configured to record the temperature of the heating module 2 and the power supplied per inhalation period. The recorded data may be displayed via a user interface under the call of the controller 32, or may be output and displayed via other output interfaces. When the recorded number of inhalations reaches a preset total number of inhalations of the aerosol-generating product 1, the controller 32 may, for example, reset, clear the recorded number of inhalations, control the aerosol generating device to shut down, control the power supply component 3 to stop supplying power to the heater, or prompt the user that the aerosol-generating product 1 has reached its inhalation limit through sound, light, vibration, etc.

[0026] The user puff data can be the basis for subsequent research, device maintenance and device design. The data of the number of user puffs can be transmitted to an external memory or processing device by any suitable data output device. For example, the aerosol generating device may comprise a radio, Bluetooth, connected to the controller 32 or memory, or a Universal Serial Bus (USB) socket connected to the controller or memory. Alternatively, the aerosol generating device may be configured to transmit the data from the memory to an external memory in a charging device for the battery cell 31 each time the aerosol generating device is recharged via a suitable data connection.

[0027] Further, in select embodiments, the aerosol-generating product 1 may employ a tobacco-containing material that releases volatile compounds from the inhalable product when heated, or may be a non-tobacco material suitable for electrically heated smoking after heating. The aerosol-generating product 1 may employ a solid matrix that includes one or more of the following powders, granules, elongated pieces, strips, or flakes: vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco. Alternatively, the aerosol-generating product 1 may contain additional tobacco or non-tobacco volatile flavor compounds to be released when heated. In some select embodiments, the aerosol-generating product 1 is fabricated to have a traditional cigarette or cigar shape.

[0028] Furthermore, in an alternative embodiment, the aerosol-generating product 1 may be included in a smoke-generating article. During operation, the smoke-generating article including the aerosol-generating product 1 may be completely contained within the aerosol-generating device. In this case, the user can inhale on the mouthpiece of the aerosol-generating device. The mouthpiece may be any part of the aerosol-generating device that is placed in the mouth of the user to directly inhale the aerosol generated by the aerosol-generating product 1 or the aerosol-generating device. The aerosol is delivered to the user's mouth via the mouthpiece. Alternatively, during operation, the smoke-generating article including the aerosol-generating product 1 may be partially contained within the aerosol-generating device. In this case, the user can inhale directly on the mouthpiece of the smoke-generating article.

[0029] In one embodiment, referring to FIGS. 1-5, the heating module 2 includes a tubular body 21, a porous body 22, and a heater .

[0030] In one embodiment, the tubular body 21 is made of an insulating material such as a PAEK type material such as PEEK, PEKK, PEK, or a high temperature resistant plastic material such as a PI material, a PBI material, or an insulating material such as ceramics, glass, or the like, or the tubular body 21 is at least surface insulated.

[0031] In one embodiment, the base material of the tubular body 21 is a metal tube or a metal sheet, and an insulating layer is disposed on the surface of the metal tube or the metal sheet, and the heater 23 and the electrodes are disposed on the insulating layer. Since the metal tube or the metal sheet is made of metal, it has a small specific heat capacity, a high heat transfer efficiency, and can reduce energy consumption. The thickness of the metal tube or the metal sheet may be any value between 0.03 and 0.2 mm, and may be a value between 0.04 and 0.1 mm, 0.05 and 0.1 mm, or 0.05 and 0.08 mm, etc., and since the metal tube or the metal sheet has a small thickness, it is possible to further reduce the energy consumption of the tubular body 21 itself, thereby achieving energy saving, and it is also possible to further improve the heating efficiency of the aerosol-generating product 1 by the heating module 2. The insulating layer may be a metal oxide insulating layer formed by oxidizing the surface of the metal tube or metal plate, or an insulating layer formed by applying a slurry made of an insulating material to the surface of the metal tube or the metal sheet.

[0032] The tubular body 21 is generally tubular, and has formed therein a receiving cavity including at least a first receiving cavity 211 and a second receiving cavity. That is, the receiving cavity can be divided into at least two parts, so that at least a part of the receiving cavity is composed of the first receiving cavity 211 and the second receiving cavity (not shown). The first receiving cavity 211 and the second receiving cavity are arranged side by side in the axial direction and penetrate each other. The first receiving cavity 211 is used to receive at least a part of the aerosol-generating product 1, and the second receiving cavity is used to receive the porous body 22 having at least one hole through which air passes. After passing through the porous body 22, the air can enter the first receiving cavity 211 and further enter the inside of the aerosol-generating product 1.

[0033] 2, 3 and 5, the heater 23 is disposed on the side of the tubular body 21 and includes a first heating area 231 and a second heating area 232. The first heating area 231 and the second heating area 232 can both generate heat or radiate infrared rays. The first heating area 232 is provided on the outer periphery of the first containing cavity 211 and is used to heat or keep warm the aerosol-generating product 1 located in the first containing cavity 211. The second heating area 232 is provided on the outer periphery of the second containing cavity and is used to heat the porous body 22 to increase the temperature of the porous body 22. The porous body 22 then heats the air flowing through the voids therein, and the air becomes hot air. After the hot air enters the inside of the aerosol-generating product 1, the aerosol-generating product 1 can be baked uniformly from the inside, so that the aerosol-generating product 1 generates aerosol.

[0034] Since the first heating area 231 is located on the outer periphery of the first containing cavity 211, it can heat or keep the aerosol-generating product 1 in the first containing cavity 211 warm, ensure that the air and aerosol in the aerosol-generating product 1 can maintain a high temperature, and prevent the aerosol-generating product 1 from being unable to continue baking sufficiently due to a drop in temperature caused by heat exchange between the air and the aerosol-generating product 1, and also prevent the generated aerosol from condensing due to the low environmental temperature while flowing inside the aerosol-generating product 1, causing the pores inside the aerosol-generating product 1 to become clogged.

[0035] In an alternative embodiment, the heating power of the second heating area 232 is greater than that of the first heating area 231. The second heating area 232 is used to generate high-temperature air by the porous body 22. The aerosol-generating product 1 mainly generates aerosol by baking the high-temperature air. The second heating area 232 has a large heating power, so that the porous body 22 can rapidly heat the porous body 22 to a high temperature, so that the porous body 22 can rapidly heat the air flowing therethrough to a preset temperature, and the aerosol-generating product 1 can generate aerosol quickly. The first heating area 231 is mainly used to keep the aerosol-generating product 1 warm, ensure that the aerosol-generating product 1 is in a high-temperature environment, and reduce the rate and range of temperature drop of the air and aerosol inside the aerosol-generating product 1.

[0036] By setting the heating power of the first heating area 231 lower than the heating power of the second heating area 232, the overall energy consumption of the heating module 2 can be reduced, which contributes to extending the standby time of the aerosol generating device.

[0037] Of course, it will be appreciated that in some embodiments, the heating power of the first heating area 231 may have a large heating power, so that the first heating area 231 can also bake the aerosol-generating product 1 to volatilize and form an aerosol. In some embodiments, the heating power of the first heating area 231 may be equal to the heating power of the second heating area 232, or the heating power of the first heating area 231 may be greater than the heating power of the second heating area for a certain period of time, so that the baking efficiency of the aerosol-generating product 1 is high, and the user's need to release smoke quickly at the first draw is met.

[0038] In an alternative embodiment, heater 23 is a resistive heater and generates heat by the thermal effect of resistance.

[0039] In one embodiment, the heater 23 may be a heating coil, a mesh net, a metal etched net, or the like, and is sleeved onto the outside of the tubular body 21, embedded in the sidewall of the tubular body 21, or mounted inside the tubular body 21.

[0040] In one embodiment, the heater 23 is a heating film, which may be a resistive film. The resistive film may be formed by forming a resistive conductive material, such as an iron-chromium-aluminum alloy, a nickel-chromium alloy, a nickel-iron alloy, platinum, tungsten, silver, or conductive ceramics, on the side of the tubular body 22 by thick-film printing, spray coating, vapor deposition, ion implantation, ion sputtering, or the like. Alternatively, the resistive film may be formed by forming a resistive conductive material, such as an iron-chromium-aluminum alloy, a nickel-chromium alloy, a nickel-iron alloy, platinum, tungsten, silver, or conductive ceramics, on a cast sheet by thick-film printing, spray coating, vapor deposition, ion implantation, ion sputtering, or the like, and then coating the cast sheet on the side of the tubular body 21 and sintering it.

[0041] In one embodiment, the heating film may be an infrared film coated on the outer surface or inner surface of the tubular body 21. The infrared film generates heat when power is received, and generates infrared rays of a certain wavelength, such as far infrared rays of 8 μm to 15 μm. If the wavelength of the infrared rays matches the absorption wavelength of the aerosol-generating product 1, the energy of the infrared rays is easily absorbed by the aerosol-generating product. In the embodiment of the present application, the wavelength of the infrared rays is not limited, and may be infrared rays of 0.75 μm to 1000 μm, or alternatively, far infrared rays of 1.5 μm to 400 μm.

[0042] In one embodiment, the heating film may be other flexible films capable of generating heat, such as graphene electric heating film, FPC electric heating film, etc.

[0043] 2-5, the first heating area 231 and the second heating area 232 are connected in parallel to each other and have the same operating voltage. Therefore, by making the operating resistance of the first heating area 231 and the second heating area 232 different, the first heating area 231 and the second heating area 232 can have different heating powers.

[0044] In an alternative embodiment, the heater 23 is a resistive film, which partly constitutes a first heated area 231 and partly constitutes a second heated area 232. In the direction of current flow in each heated area, the resistance of the first heated area 231 is greater than the resistance of the second heated area 232. JPEG2025515363000002.jpg1126 (where R is the resistance of the resistive film, L is the length of the resistive film in the direction of the current, ρ is the resistivity of the resistive film, and S is the cross-sectional area of ​​the cross section through which the current flows in the resistive film, where S=w*h, h is the thickness of the cross section, and w is the width of the cross section), so According to the formula of JPEG2025515363000003.jpg1126, by changing L and / or S, the first heating area 231 and the second heating area 232 made of the same material can have different resistances R. Of course, the resistive film of the first heating area 231 and the resistive film of the second heater 232 can have different resistivities ρ by being made of different materials, so that the first heating area 231 and the second heating area 232 having the same L and S have different resistances. That is, by adjusting ρ, L, and S, the magnitude of the resistance of the first heating area 231 and the second heating area 232 can be adjusted.

[0045] In one embodiment, the resistive films of the first heating area 231 and the second heating area 232 are the same, i.e., ρ is the same, but the thickness of the entire resistive film is not uniform, and the thickness of the resistive film of the first heating area 231 is smaller than that of the second heating area 232. When the lengths of the first heating area 231 and the second heating area 232 in the current direction are the same or have little difference, the resistance (operating resistance) of the first heating area 231 is larger than that of the second heating area 232. According to the power formula Q=U2 / R (Q is heating power, U is operating voltage, and R is operating resistance), it can be seen that the heating power of the first heating area 231 with higher resistance is smaller than that of the second heating area 232.

[0046] 2, 3 and 5, the resistive films of the first heating area 231 and the second heating area 232 are the same, i.e., ρ is the same, and the thickness of the entire resistive film is uniform, the thickness of the resistive film of the first heating area 231 is equal to that of the resistive film of the second heating area 232, but the length of the first heating area 231 in the current direction is greater than the length of the second heating area 232 in the current direction. Thus, the operating resistance of the first heating area 231 is greater than the operating resistance of the second heating area 232, and when the first heating area 231 and the second heating area 232 have the same operating voltage, the heating power of the first heating area 231 with higher resistance is smaller than the heating power of the second heating area 232.

[0047] 2-4, the heating module 2 further comprises a plurality of electrodes, at least one of which is a common electrode 24. The common electrode 24 extends in the axial direction of the tubular body 21 and is simultaneously electrically connected to the first heating area 231 and the second heating area 232. The common electrode 24 may be a common negative electrode of the first heating area 231 and the second heating area 232, or a common positive electrode of the first heating area 231 and the second heating area 232.

[0048] When there is one common electrode 24, one ends of the first heating area 231 and the second heating area 232 are both electrically connected to the common electrode 24, and the other ends of the first heating area 231 and the second heating area 232 are each independently electrically connected to a different electrode.

[0049] The common electrode 24 includes a wide portion 241 and a narrow portion 242, and the width of the wide portion 241 in the circumferential direction of the tubular body 21 is larger than the width of the narrow portion 242 in the circumferential direction of the tubular body 21. The narrow portion 242 is electrically connected to the first heated area 231, and the wide portion 241 is electrically connected to the second heated area 232. Another electrode electrically connected to the first heated area 231 and another electrode electrically connected to the second heated area 232 may have the same circumferential width, so that the first heated area 231 connected to the narrow portion 242 has a circumferential length larger than the second heated area 232 connected to the wide portion 241 (the length of the heated area described in this application includes the axial length and the circumferential length, both of which refer to the length through which current flows, regardless of whether the heated area forms a closed ring). Since the current in the first heated area 231 flows in the circumferential direction and the current in the second heated area 232 flows in the circumferential direction, the dynamic resistance of the first heated area 231 is greater than the dynamic resistance of the second heated area 232 .

[0050] Of course, in other embodiments, the separate electrodes electrically connected to the first heated area 231 and the separate electrodes electrically connected to the second heated area 232 may have different circumferential widths. For example, the circumferential width of the separate electrodes electrically connected to the first heated area 231 is smaller than the circumferential width of the separate electrodes electrically connected to the second heated area 232. In other embodiments, the common electrode 24 has the same circumferential width everywhere, but the circumferential width of the separate electrodes electrically connected to the first heated area 231 is smaller than the circumferential width of the separate electrodes electrically connected to the second heated area 232. Regardless of how the width of each electrode is set, as long as the distance between the electrodes at both ends of the first heating area 231 is greater than the distance between the electrodes at both ends of the second heating area 232, assuming that the thickness and material of the heating film are the same, it is possible to achieve that the operating resistance of the first heating area 231 is greater than the operating resistance of the second heating area 232, and that, for the operating voltages of the first heating area 231 and the second heating area 232, the heating power of the first heating area 231 is greater than the heating power of the second heating area 232.

[0051] 4, there are two common electrodes 24, each of which is a common positive electrode and a common negative electrode. One end of each of the first heating area 231 and the second heating area 232 is electrically connected to one common electrode 24, and the other end of each of the first heating area 231 and the second heating area 232 is electrically connected to the other common electrode 24.

[0052] Optionally, one common electrode 24 includes a wide portion 241 and a narrow portion 242, and the other common electrode 24 has the same circumferential width everywhere. The narrow portion 242 is electrically connected to the first heated area 231, and the wide portion 241 is electrically connected to the second heated area 232. As a result, the first heated area 231 connected to the narrow portion 242 has a circumferential length (length through which current flows) greater than that of the second heated area 232 connected to the wide portion 241, and current flows in the first heated area 231 in the circumferential direction, and current flows in the second heated area 232 in the circumferential direction, so that the dynamic resistance of the first heated area 231 is greater than that of the second heated area 232.

[0053] Optionally, the two common electrodes 24 (i.e., a common positive electrode and a common negative electrode) each include a wide portion 241 and a narrow portion 242. The two narrow portions 242 are both electrically connected to the first heated area 231, and the two wide portions 241 are both electrically connected to the second heated area 232. As a result, the first heated area 231 connected to the two narrow portions 242 has a circumferential length (length through which current flows) greater than that of the second heated area 232 connected to the two wide portions 241, and the current in the first heated area 231 flows in the circumferential direction, and the current in the second heated area 232 flows in the circumferential direction, so that the operating resistance of the first heated area 231 is greater than that of the second heated area 232.

[0054] The first heating area 231 has one end electrically connected to the narrow portion 242 of the common positive electrode, and the other end electrically connected to the narrow portion 242 of the common negative electrode. The second heating area 232 has one end electrically connected to the wide portion 241 of the common positive electrode, and the other end electrically connected to the wide portion 241 of the common negative electrode. This further increases the difference between the circumferential length of the first heating area 231 connected to the narrow portion 242 and the circumferential length of the second heating area 232 connected to the wide portion 241, so that the resistance of the first heating area 231 between the two narrow portions 242 is further increased than the resistance of the second heating area 232 between the two wide portions 241. When the first heating area 231 and the second heating area 232 have the same operating voltage, the heating power of the first heating area 231 with a larger resistance is further reduced than the heating power of the second heating area 232.

[0055] Optionally, the two common electrodes 24 (i.e., a common positive electrode and a common negative electrode) each include a first part and a second part. The two first parts are both electrically connected to the first heating area 231, and the two second parts are both electrically connected to the second heating area 232. In addition, a current flows from one first part to the other first part through the first heating area 231, and a current flows from one second part to the other second part through the second heating area 232. In addition, the length through which the current flows between the two first parts is greater than the length through which the current flows between the two second parts, and the dynamic resistance of the first heating area 231 is greater than that of the second heating area 232.

[0056] Since the first heating area 231 and the second heating area 232 are located between a common positive electrode and a common negative electrode, the first heating area 231 and the second heating area 232 have the same operating voltage.

[0057] 2 and 3, the resistive film is continuous without interruption in the axial direction of the tubular body 21. The resistive film is equally divided into two parts, a left part and a right part, which are arranged in parallel in the circumferential direction of the tubular body 21, by the common electrode 24. Both the left part and the right part include a first heating area 231 and a second heating area 232. Of course, it will be understood that the resistive film may be provided discontinuously on the side surface of the tubular body 21, for example, the resistive film may be discontinuously divided into two parts, the first heating area 231 and the second heating area 232.

[0058] In the embodiment shown in FIG. 5, the heater 23 is a resistive film, a part of which constitutes the first heating area 231 and a part of which constitutes the second heating area 232. A current flows in the axial direction of the first heating area 231 and the second heating area 232. The axial length of the first heating area 231 is greater than that of the second heating area 232. The resistive film covers the side surface of the tubular body 21 with a uniform thickness, i.e., the first heating area 231 and the second heating area 232 have the same thickness. As a result, the operating resistance of the first heating area 231 is greater than that of the second heating area 232, and further, when the first heating area 231 and the second heating area 232 have the same operating voltage, the heating power of the first heating area 231 with a greater resistance is smaller than that of the second heating area 232.

[0059] 5, the heater 23 further includes a first electrode 251, a second electrode 252, and a third electrode 253, all of which extend in the circumferential direction of the tubular body 21. The first electrode 251 is electrically connected to the first heating area 231, the third electrode 253 is electrically connected to the second heating area 232, and the second electrode 252 is electrically connected to the first heating area 231 and the second heating area 232 at the same time. Referring to FIG. 5, the second electrode 252 is located between the first electrode 251 and the third electrode 253.

[0060] Optionally, the first electrode 251 and the third electrode 253 are negative electrodes, and the second electrode 252 is a positive electrode, and constitutes a common positive electrode of the first heating area 231 and the second heating area 232. Since the second electrode 232 is a common positive electrode, the first heating area 231 between the first electrode 231 and the second electrode 232 and the second heating area 232 between the second electrode 252 and the third electrode 253 have the same operating voltage.

[0061] Optionally, one of the first electrode 251 and the second electrode 252 is a negative electrode, and the third electrode 253 is a positive electrode, and constitutes a common positive electrode of the first heating area 231 and the second heating area 232. The controller 32 controls so that only one of the first electrode 251 and the second electrode 252 is conductive to the third electrode 253. When the controller 32 controls the second electrode 252 to be conductive to the third electrode 253, the second heating area 232 heats, and the first heating area 231 is free and does not participate in heating. When the controller 32 controls the first electrode 251 to be conductive to the third electrode 253, both the first heating area 231 and the second heating area 232 heat.

[0062] When the potential difference U between the positive and negative electrodes is the same, if only the second heating area 232 heats up, the heating power Q1=U2 / R2, where U is the potential difference between the positive and negative electrodes, and R2 is the resistance of the second heating area. If both the first heating area 231 and the second heating area 232 heat up, the heating power Q2=U2 / (R1+R2), where R1 is the resistance of the first heating area, so that Q1>Q2. Therefore, the controller 32 can control the third electrode 253 to alternately conduct electricity to the first electrode 251 and the second electrode 252.

[0063] When the heater includes electrodes and a heating film disposed on the side surface of the tubular body, the electrodes cover the surface of the heating film, and for example, the heating film is formed on the side surface of the tubular body 22 by thick film printing, spray coating, vapor deposition, ion implantation, ion sputtering, etc., and surrounds the tubular body 22 360°, and the electrodes are formed on the surface of the heating film by thick film printing, spray coating, vapor deposition, ion implantation, ion sputtering, etc. Since the resistance of the electrodes is much smaller than the resistance of the heating film, almost no current flows through the heating film overlapping the electrodes.

[0064] In one embodiment, at least one of the first heating area and the second heating area generates heat by magnetic induction. That is, at least one of the first heating area and the second heating area includes grade 430 stainless steel (SS430), grade 420 stainless steel (SS420), or other magnetically sensitive material that generates heat in a changing magnetic field, such as an iron-nickel alloy material (e.g., permalloy), and thus can self-heat due to the generation of eddy currents and hysteresis in the changing magnetic field. Correspondingly, the aerosol generating device further includes a magnetic field generator, such as an induction coil, for generating a magnetic field that changes with an alternating current, and the circuit board can connect the battery cell 31 and the induction coil to convert the direct current output from the battery cell 31 into an alternating current. Optionally, the frequency of the alternating current is in the range of 80KHz to 400KHz, and more specifically, the frequency may be in the range of about 200KHz to 300KHz.

[0065] When the first heating area 231 and the second heating area 232 both generate heat by magnetic induction, the first heating area 231 and the second heating area 232 adopt different materials to have different heating efficiencies. Alternatively, an induction coil provides the first heating area 231 and the second heating area 232 with changing magnetic fields of different strengths, so that the first heating area 231 and the second heating area 232 have different heating efficiencies. In this case, the induction coil may be one or more.

[0066] In one embodiment, the controller 32 is electrically connected to the heating module 2 and the power supply component 3. The controller 32 controls the power supply component 3 to provide different operating voltages to the first heating area 231 and the second heating area 232, or to provide operating voltages with different duty ratios, or to provide different magnetic field strengths or changing magnetic fields with changing frequencies, etc., so that the first heating area 231 and the second heating area 232 can have different heating efficiencies, for example, the heating power of the first heating area 231 is smaller than the heating efficiency of the second heating area 232.

[0067] In one embodiment, referring to Figs. 2-4, the porous body 22 is glass fiber having pores. Compared with honeycomb ceramics, honeycomb glass fiber can have denser pores, so that air can be heated more fully and quickly. In one embodiment, the porous body 22 is a honeycomb structure made of a carbon material, and the carbon material may be graphite, graphene, graphite alloy, or other carbon materials. The advantage of using a carbon material to make a honeycomb structure is that the carbon material has a higher thermal conductivity than ceramics, glass fiber, etc., and its thermal conductivity can be up to 129 W / (m·K). In one embodiment, the porous body 22 is made of a metal foam, such as silver foam, titanium foam, etc. The characteristics of the metal foam material are as follows: (1) Lightweight, low specific gravity: Metal foam is a mixture of metal and gas, and its specific gravity is only 1 / 50 to 3 / 5 of the same volume of metal. (2) High void ratio: Generally, the void ratio of porous metal foam is 40% to 90%, while the void ratio of sponge-like metal foam can be up to 98%. (3) Large specific surface area: The specific surface area of ​​metal foam is 10 to 40 cm 2 / cm 3 (4) Large pore size range: Through process control, pore sizes from microns to centimeters can be obtained. The properties of metal foam can improve the heating efficiency of the air flowing through it.

[0068] In the above-mentioned heating module and aerosol generating device, the first heating area heats or keeps warm the aerosol-generating product in the receiving cavity, and the second heating area heats the porous body in the receiving cavity, and further heats the air flowing inside the porous body to form hot air entering the aerosol-generating product. On the one hand, the design of the first heating area and the second heating area can slow down the temperature drop rate of the hot air in the aerosol-generating product, so that the aerosol-generating product can be more fully heated by the hot air, so that the aerosol-generating product can be more fully utilized to prevent the aerosol-generating product from being wasted, and can also prevent the aerosol generated from the aerosol-generating product from condensing in the aerosol-generating product, thereby preventing clogging of the aerosol-generating product. On the other hand, by arranging the heater only in the tubular body, not only can air heating be performed on the aerosol-generating product by the porous body, but the aerosol-generating product can also be heated or kept warm by heat transfer or radiation, resulting in no need to arrange a heating circuit in the porous body, no need to electrically connect the porous body to an element having a conductive connection function such as a wire, and no need to add an auxiliary element for heating the porous body, thus simplifying the structure and being advantageous for maintaining the porous body inside the tubular body.

[0069] It should be noted that although the preferred embodiments of the present application are provided by the specification and drawings of the present application, the present application can be realized in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to further limit the contents of the present application, but are provided for the purpose of providing a more complete and comprehensive understanding of the disclosure of the present application. In addition, various embodiments not listed above in which the above technical features are further combined with each other are all considered to be within the scope of the description of the present application. Furthermore, a person skilled in the art may make improvements or modifications based on the above description, and all of these improvements and modifications are intended to fall within the scope of protection of the claims attached to this application. [Explanation of symbols]

[0070] 1. Aerosol-generating products 2 Heating Module 21 Tubular body 211 First containment cavity 22 Porous bodies 23 Heater 231 First heating area 232 Second heating area 24 Common electrode 241 Wide section 242 Narrow part 251 1st electrode 252 2nd electrode 253 3rd electrode 3 Power Components 31 Battery Cell 32 Controller

Claims

1. 1. A heating module for heating an aerosol-generating product, comprising: a tubular body having formed therein a containment cavity, one portion of which is used to contain the aerosol-generating product and one portion of which is used to contain a porous body, a tubular body through which air passes through voids within the porous body and then into the interior of the aerosol-generating product; A heating module comprising: a heater arranged on a side of the tubular body and including a first heating area and a second heating area, wherein the first heating area is provided corresponding to the outer periphery of the aerosol-generating product and is used to heat or keep the aerosol-generating product warm, and the second heating area is provided corresponding to the outer periphery of the porous body and is used to heat the porous body.

2. The heating module according to claim 1 , wherein the heating power of the second heating area is greater than the heating power of the first heating area.

3. The heating module of claim 1 , wherein the first heating area and the second heating area are connected in parallel to each other and have the same operating voltage.

4. 2. The heating module of claim 1, wherein the heater is a resistive heater, and in a direction of current flow, the resistance of the first heating area is greater than the resistance of the second heating area.

5. the resistive heater is a resistive film, a part of the resistive film constitutes the first heating area and a part of the resistive film constitutes the second heating area, and currents in the first heating area and the second heating area flow in a circumferential direction thereof; The circumferential length of the first heating area is greater than the circumferential length of the second heating area, or The heating module according to claim 4 , wherein the thickness of the first heating area is smaller than the thickness of the second heating area.

6. the heater further includes a common electrode extending in an axial direction of the tubular body and electrically connected simultaneously to the first heating area and the second heating area; the common electrode includes a wide portion and a narrow portion, the circumferential width of the wide portion being greater than the circumferential width of the narrow portion, The heating module of claim 5 , wherein the narrow portion is electrically connected to the first heating area and the wide portion is electrically connected to the second heating area.

7. The heater further includes two common electrodes, a common positive electrode and a common negative electrode, both of which extend in an axial direction of the tubular body and are both electrically connected to the first heating area and the second heating area at the same time; one common electrode has the same width everywhere in the circumferential direction of the tubular body, the other common electrode includes a wide portion and a narrow portion, the width of the wide portion in the circumferential direction of the tubular body is larger than the width of the narrow portion in the circumferential direction of the tubular body, the narrow portion is electrically connected to the first heating area, and the wide portion is electrically connected to the second heating area; or each of the two common electrodes includes a wide portion and a narrow portion, the width of the wide portion in the circumferential direction of the tubular body is greater than the width of the narrow portion in the circumferential direction of the tubular body, and the two narrow portions are electrically connected to the first heating area and the two wide portions are electrically connected to the second heating area; or The heating module of claim 5, characterized in that the two common electrodes each include a second portion and a first portion, the two first portions are electrically connected to the first heating area, and the two second portions are electrically connected to the second heating area, and the pitch of the two first portions in the circumferential direction of the tubular body is greater than the pitch of the two second portions in the circumferential direction of the tubular body.

8. The heating module described in claim 7, characterized in that the resistive film is continuous in the axial direction of the tubular body, and the resistive film is equally divided into two parallel parts in the circumferential direction of the tubular body by the two common electrodes, each part including the first heating area and the second heating area.

9. the resistive heater is a resistive film, a part of the resistive film constitutes the first heating area and a part of the resistive film constitutes the second heating area, and a current flows in an axial direction of the first heating area and the second heating area; The axial length of the first heating area is greater than the axial length of the second heating area; or The heating module according to claim 4 , wherein the thickness of the first heating area is smaller than the thickness of the second heating area.

10. the heater further includes a first electrode, a second electrode, and a third electrode, all of which extend in a circumferential direction of the tubular body, the first electrode being electrically connected to the first heating area, the third electrode being electrically connected to the second heating area, and the second electrode being electrically connected to the first heating area and the second heating area simultaneously; 10. The heating module according to claim 9, wherein the first electrode and the third electrode are negative electrodes, the second electrode is a positive electrode, and constitute a common positive electrode of the first heating area and the second heating area.

11. the heater further includes a first electrode, a second electrode, and a third electrode, all of which extend in a circumferential direction of the tubular body, the first electrode being electrically connected to the first heating area, the third electrode being electrically connected to the second heating area, and the second electrode being electrically connected to the first heating area and the second heating area simultaneously; 5. The heating module according to claim 4, wherein one of the first electrode and the second electrode is a negative electrode, and the third electrode is a positive electrode, and constitutes a common positive electrode of the first heating area and the second heating area.

12. The heating module of claim 1 , wherein the heater is disposed on an outer surface of the tubular body.

13. 2. The heating module according to claim 1, characterized in that the porous body is a glass fiber having many holes, or the porous body is a honeycomb structure made of a carbon material, or the porous body is made of foam metal.

14. The heating module of claim 1, characterized in that the heater includes a resistive or infrared film arranged on a side of the tubular body, and further includes an electrode covering a surface of the resistive or infrared film and electrically connected to the resistive or infrared film.

15. 2. The heating module according to claim 1, characterized in that at least one of the first heating area and the second heating area is used to generate heat by magnetic induction, or generate heat by resistive thermal effect, or radiate infrared rays into the accommodating cavity.

16. 1. A heating module for heating an aerosol-generating product, comprising: a tubular body having formed therein a containment cavity, one portion of which is used to contain the aerosol-generating product and one portion of which is used to contain a porous body, a tubular body through which air passes through voids within the porous body and then into the interior of the aerosol-generating product; a heater including a heating film disposed on a side surface of the tubular body and an electrode electrically connected to the heating film; a part of the heating film constitutes a first heating area and a part of the heating film constitutes a second heating area, the first heating area being provided corresponding to the outer periphery of the aerosol-generating product and being used for heating or keeping warm the aerosol-generating product, and the second heating area being provided corresponding to the outer periphery of the porous body and being used for heating the porous body, There are two electrodes, each of which is electrically connected to the first heating area and the second heating area at the same time, and each of the two electrodes includes a second part and a first part, and the two first parts are electrically connected to the first heating area and the two second parts are electrically connected to the second heating area; A heating module, characterized in that the circumferential pitch of the tubular bodies of the two first portions is greater than the circumferential pitch of the tubular bodies of the two second portions.

17. An aerosol generating device comprising a heating module according to any one of claims 1 to 16.

18. The aerosol generating device of claim 17, further comprising a power supply component and a controller, the controller being electrically connected to the heating module and the power supply component to control the heating power of the second heating area to be greater than the heating power of the first heating area.

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