Heating tube, prefabricated structure thereof and smoking set

Abstract

The utility model provides a heating tube, a prefabricated structure thereof and a smoking set, the prefabricated structure of the heating tube comprises a flexible heat-resistant base film, and at least part of the flexible heat-resistant base film is used for manufacturing the inner wall of the heating tube; the heating sheet comprises a first pin, a second pin, a third pin, a first heating part and a second heating part; the first heating part and the second heating part are connected with the first pin; the second pin is connected with the first heating part, and the third pin is connected with the second heating part; the first heating part and the second heating part are adhered to the flexible heat-resistant base film and are arranged at an interval along the width direction of the flexible heat-resistant base film; the first pin, the second pin and the third pin extend out of the width edge of the flexible heat-resistant base film and are arranged at intervals in the length direction of the flexible heat-resistant base film. The technical problems that in the prior art, time-sharing heating cannot be achieved, and the heat transfer efficiency is low are solved.

Description

Technical Field

[0001] The present application relates to the technical field of smoking articles, and in particular to a heating tube and a prefabricated structure thereof and a smoking article. Background Art

[0002] Low-temperature smoking devices utilize a heating device to heat cigarettes without burning them. The heating tube is a crucial component of the heating device. In existing technologies, the heating tube is a monolithic structure attached to the outside of the heat transfer tube of the heating device. This prevents time-sharing heating of different areas, resulting in low heat transfer efficiency and inefficient smoking. Utility Model Content

[0003] The main purpose of this application is to provide a heating tube and its prefabricated structure and smoking device, aiming to solve the technical problems in the prior art of being unable to generate heat in a time-sharing manner and having low heat transfer efficiency.

[0004] This application proposes a heat pipe prefabricated structure for manufacturing a heat pipe; the heat pipe prefabricated structure includes:

[0005] a flexible heat-resistant base film, at least a portion of which is used to form the inner wall of the heating pipe; and

[0006] The heating sheet includes a first pin, a second pin, a third pin, a first heating part and a second heating part; the first heating part and the second heating part are both connected to the first pin; the second pin is connected to the first heating part, and the third pin is connected to the second heating part; the first heating part and the second heating part are adhered to the flexible heat-resistant base film and are spaced apart along the width direction of the flexible heat-resistant base film; the first pin, the second pin and the third pin extend out of the width edge of the flexible heat-resistant base film and are spaced apart along the length direction of the flexible heat-resistant base film.

[0007] Optionally, the width of the heating sheet is b; the flexible heat-resistant base film has a first length edge in its length direction; the distance between the heating sheet and the first length edge is a; wherein a>b;

[0008] When the heating element is wound into a heating tube, the portion between the heating sheet and the first length edge is wound inside the heating sheet.

[0009] Optionally, a positioning structure is provided at the first length edge.

[0010] Optionally, the width of the heating sheet is b; the flexible heat-resistant base film has a second length edge in its length direction; the distance between the heating sheet and the second length edge is c; wherein c=Nb, N is greater than 1;

[0011] Wherein, when being wound into a heating tube, the portion between the heating sheet and the second length edge is wound outside the heating sheet.

[0012] Optionally, the first heating portion includes a first resistor bar, wherein both ends of the first resistor bar are respectively connected to the first pin and the second pin; the first resistor bar includes at least one first resistor short section, wherein the first resistor short section includes a first resistor segment, a second resistor segment, and a third resistor segment connected end to end in sequence, and the first resistor segment and the third resistor segment are respectively formed from one end of the second resistor segment and extend in the same direction in the width direction of the flexible heat-resistant base film; and / or

[0013] The second heating part includes a second resistor bar, the two ends of which are respectively connected to the first pin and the third pin; the second resistor bar includes at least one second resistor short section, the second resistor short section includes a fourth resistor segment, a fifth resistor segment and a sixth resistor segment connected end to end in sequence, and the fourth resistor segment and the sixth resistor segment are respectively extended in the same direction from one end of the fifth resistor segment in the width direction of the flexible heat-resistant base film.

[0014] Optionally, the first resistor bar includes at least two first resistor short sections, and the at least two first resistor short sections are arranged in sequence along the length direction of the flexible heat-resistant base film; and / or the second resistor bar includes at least two second resistor short sections, and the at least two second resistor short sections are arranged in sequence along the length direction of the flexible heat-resistant base film.

[0015] Optionally, there are at least two first resistor bars, and the at least two first resistor bars are spaced apart in the width direction of the flexible heat-resistant base film; and / or there are at least two second resistor bars, and the at least two second resistor bars are spaced apart in the width direction of the flexible heat-resistant base film.

[0016] Optionally, the first pin, the second pin and the third pin extend from the same edge of the flexible heat-resistant base film in the width direction; and / or

[0017] The second pin and the third pin are located on the same side of the heating plate, and the first pin is located on the other side of the heating plate.

[0018] In a second aspect, an embodiment of the present application further provides a heating tube, which is formed by winding the aforementioned prefabricated heating tube structure.

[0019] In a third aspect, an embodiment of the present application further provides a smoking device comprising the heating tube as described above.

[0020] Technical advantages: The first heating part and the second heating part of the heating sheet, which are spaced apart along the width direction of the flexible heat-resistant base film, are adhered to the flexible heat-resistant base film, and the first pin commonly connected to the first heating part and the second heating part extends out of the width edge of the flexible heat-resistant base film, and the second pin connected to the first heating part and the third pin connected to the second heating part extend out of the width edge of the flexible heat-resistant base film, and are spaced apart from each other along the length direction, so that the first heating part and the second heating part can achieve independent heating; when the prefabricated structure of the heating tube is made into a heating tube, at least part of the flexible heat-resistant base film is made into the inner wall of the heating tube; the inner wall can be the channel wall of the cigarette insertion channel, so there is no need to set up a heat transfer tube, that is, it can meet the needs of at least two-section zoned heating, and can also reduce the heat loss during heat conduction caused by the setting of the heat transfer tube, thereby improving the heat transfer efficiency, improving the smoking efficiency of the cigarette, reducing energy consumption, and improving the endurance of the smoking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a prefabricated structure of a heating pipe provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of the heating element in the heating tube provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of the heating tube provided in an embodiment of the present application;

[0025] Figure 4 A schematic structural diagram of a heat pipe provided in an embodiment of the present application from one perspective;

[0026] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0027] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 7 A schematic structural diagram of the heating device provided in an embodiment of the present application.

[0029] Reference Signs List

[0030]

[0031] DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] The present embodiment first provides a prefabricated structure 1 for a heat pipe 2, which is used to form a heat pipe 2. The prefabricated structure 1 does not need to be located outside the heat transfer tube, but can be used to directly form a cigarette insertion channel S when the heat pipe 2 is formed, thereby reducing heat loss during heat transfer and improving heat transfer efficiency.

[0037] Specifically, refer to Figure 1 and Figure 2 As shown, the prefabricated structure 1 of the heating pipe includes:

[0038] a flexible heat-resistant base film 10 , at least a portion of which is used to form the inner wall 10 a of the heating tube 2 ; and

[0039] The heating sheet 20 includes a first pin 230, a second pin 240, a third pin 250, a first heating part 210 and a second heating part 220; the first heating part 210 and the second heating part 220 are both connected to the first pin 230; the second pin 240 is connected to the first heating part 210, and the third pin 250 is connected to the second heating part 220; the first heating part 210 and the second heating part 220 are adhered to the flexible heat-resistant base film 10 and are spaced apart along the width direction of the flexible heat-resistant base film 10; the first pin 230, the second pin 240 and the third pin 250 extend out of the width edge of the flexible heat-resistant base film 10 and are spaced apart along the length direction of the flexible heat-resistant base film 10.

[0040] In this embodiment, the first heating portion 210 and the second heating portion 220 of the heating sheet 20, which are spaced apart along the width direction of the flexible heat-resistant base film 10, are bonded to the flexible heat-resistant base film 10, and the first pin 230 connected to the first heating portion 210 and the second heating portion 220 extends out of the width edge of the flexible heat-resistant base film 10, the second pin 240 connected to the first heating portion 210 and the third pin 250 connected to the second heating portion 220 extend out of the width edge of the flexible heat-resistant base film 10, and are spaced apart from each other along the length direction. The first heating part 210 and the second heating part 220 can achieve independent heating; when the prefabricated structure 1 of the heating tube is made into the heating tube 2, at least part of the flexible heat-resistant base film 10 is made into the inner wall 10a of the heating tube 2; the inner wall 10a can be the channel wall of the cigarette insertion channel S, and thus there is no need to set up a heat transfer tube, that is, it can meet the requirements of at least two-section zoned heating, and can also reduce the heat loss during heat conduction caused by the setting of the heat transfer tube, thereby improving the heat transfer efficiency, improving the smoking efficiency of the cigarette, reducing energy consumption, and improving the endurance of the smoking device.

[0041] Of course, it should be noted that the prefabricated structure 1 of the heating tube provided in the embodiment of the present application is intended to solve the heat loss caused by the installation of the heat transfer tube; however, it does not mean that the prefabricated structure 1 of the heating tube cannot be used in a structure provided with a heat transfer tube. For example, in some application scenarios, a heat transfer tube can also be provided in the inner wall 10a of the heating tube 2 made of the prefabricated structure 1 of the heating tube 2 in the heating device 1000. However, the heat transfer efficiency of this setting is relatively low compared to that without a heat transfer tube. It can be specifically set according to the type of cigarette that needs to be heated; for example, when the heating temperature required for some cigarettes is relatively low, a structure with a heat transfer tube can be adopted; and when the heating temperature required for some cigarettes is relatively high, there is no need to use a heat transfer tube, and the inner wall 10a made of the flexible heat-resistant base film 10 can be directly used as the inner wall 10a of the cigarette insertion channel S.

[0042] In the above embodiment, the flexible, heat-resistant base film 10 can be a PI film (polyimide film), which has excellent thermal conductivity, heat resistance, insulation, adhesion, and radiation resistance, and can be used for a long time within the temperature range of the smoking device. The heating sheet 20 can be pressed against the base film. When the flexible, heat-resistant base film 10 serves as the channel wall of the insertion channel S, its excellent heat resistance can prevent damage to the base film caused by heat.

[0043] In the above embodiment, in the heating device 1000, the heating element 20 can rapidly heat up when powered on; while ensuring battery current safety, the heating element 20 can pass more current, provide greater heating power, and rapidly increase the temperature. In summary, the initial resistance of the heating element 20 needs to be as small as possible while ensuring safety. For example, when using commonly used 18650 series batteries, the resistance can be configured to be between 0.4Ω and 1Ω.

[0044] The temperature control circuitry of the heating element 20 utilizes the metal's temperature coefficient of resistance (TCR) to detect changes in the metal's resistance to achieve temperature control. Therefore, the material selected for the heating element 20 must have a relatively large TCR (Temperature Coefficient of Resistance) of ≥1000 at 20°C. Commonly selected materials include nickel-chromium alloy, nickel-iron alloy, stainless steel, iron-chromium-aluminum, titanium, and nickel.

[0045] As an optional implementation of the above embodiment, Figure 1 As shown, the width of the heating sheet 20 is b; the flexible heat-resistant base film 10 has a first length edge in its length direction; the distance between the heating sheet 20 and the first length edge is a; wherein a>b; wherein, when the heating sheet 20 is wound into the heating tube 2, the portion between the heating sheet 20 and the first length edge is wound inside the heating sheet 20. Figure 1As shown, when winding, the part between the heating sheet 20 and the first length edge is the second part 12, and the second part 12 is wound into a cylindrical structure and is located inside the heating sheet 20; the distance between the heating sheet 20 and the first length edge is set to be greater than the width, so that after winding, the flexible heat-resistant base film 10 has a surplus after completing a full circle, thereby avoiding short circuit of the heating part of the heating sheet 20 and preventing the ash of the cigarette from entering the heating part.

[0046] In some embodiments, the value of a (in mm) is greater than b (in mm) + 0.5 mm.

[0047] As an optional embodiment of the above embodiment, a positioning structure is provided at the edge of the first length (not shown). In the embodiment, the prefabricated structure 1 of the heating pipe is provided with a positioning structure so that when the heating sheet 20 is pressed onto the flexible heat-resistant base film 10, the positioning structure is first positioned on the jig to facilitate the accurate positioning of the second portion 12 of the heating sheet 20 onto the flexible heat-resistant base film 10, so that the heating sheet 20 can be fitted with the second portion 12 under the action of the pressing tool, thereby improving the accuracy of the position of the heating tube 2 after molding and reducing the risk of short circuit of the heating tube 2.

[0048] As an optional implementation of the above embodiment, Figure 1 As shown, the width of the heating sheet 20 is b; the flexible heat-resistant base film 10 has a second length edge in its length direction; the distance between the heating sheet 20 and the second length edge is c; wherein c=Nb, N is greater than 1; wherein, when wound into a heating tube 2, the portion between the heating sheet 20 and the second length edge is wound outside the heating sheet 20. Figure 1 As shown, when winding, the portion between the heating sheet 20 and the second length edge is the third portion 13, and the distance between the heating sheet 20 and the second length edge is set to be at least greater than the width of the heating sheet 20, so that after winding, the flexible heat-resistant base film 10 has a surplus amount after completing a complete circle outside the heating sheet 20, thereby avoiding the heating part of the heating sheet 20 from being exposed.

[0049] Further, refer to Figure 1 As shown, the N can be an integer greater than 1, such as 2, 3, 4 or 5 and above, so that the flexible heat-resistant base film 10 is wound multiple times around the outside of the heating sheet 20; combined Figure 4 、 Figure 5 and Figure 6 As shown, the thickness of the base film on the inner side of the heat pipe 2 is smaller than the thickness of the base film on the outer side of the heat pipe 2, thereby allowing more heat to be transferred inward, reducing heat loss.

[0050] As an optional implementation of the above embodiment, Figure 2As shown, the first heating part 210 includes a first resistor bar 211, and the two ends of the first resistor bar 211 are respectively connected to the first pin 230 and the second pin 240; the first resistor bar 211 includes at least one first resistor short section, and the first resistor short section includes a first resistor segment 2111, a second resistor segment 2112 and a third resistor segment 2113 connected in sequence end to end, and the first resistor segment 2111 and the third resistor segment 2113 are respectively extended in the same direction from one end of the second resistor segment 2112 in the width direction of the flexible heat-resistant base film 10.

[0051] In one embodiment, the first resistor strips 211 are arranged in a serpentine pattern to increase the heating area and improve the uniformity of heat transfer. In some embodiments, the second resistor segments 2112 extend along the length of the flexible heat-resistant base film 10. When there are two or more first heating short sections, two adjacent first heating short sections are connected (the first resistor segment 2111 of one is connected to the third resistor segment 2113 of the other), so that the first resistor strips 211 are arranged in a serpentine pattern extending along the length.

[0052] like Figure 2 As shown, the second heating part 220 includes a second resistor bar 221, and the two ends of the second resistor bar 221 are respectively connected to the first pin 230 and the third pin 250; the second resistor bar 221 includes at least one second resistor short section, and the second resistor short section includes a fourth resistor segment 2211, a fifth resistor segment 2212 and a sixth resistor segment 2213 connected in sequence end to end, and the fourth resistor segment 2211 and the sixth resistor segment 2213 are respectively extended in the same direction from one end of the fifth resistor segment 2212 in the width direction of the flexible heat-resistant base film 10.

[0053] In one embodiment, the second resistor strips 221 are arranged in a serpentine pattern to increase the heating area and improve the uniformity of heat transfer. In some embodiments, the fourth resistor segment 2211 extends along the length of the flexible heat-resistant base film 10. When there are two or more second heating short sections, two adjacent second heating short sections are connected (the fourth resistor segment 2211 of one is connected to the sixth resistor segment 2213 of the other). In this way, the second resistor strips 221 are arranged in a serpentine pattern extending along the length of the flexible heat-resistant base film 10.

[0054] As an optional implementation of the above embodiment, Figure 2As shown, the first resistor bar 211 includes at least two first resistor segments, which are sequentially arranged along the length of the flexible heat-resistant base film 10; and / or the second resistor bar 221 includes at least two second resistor segments, which are sequentially arranged along the length of the flexible heat-resistant base film 10. By providing multiple first heating segments and / or second heating segments, the serpentine arrangement density of the first resistor bar 211 and / or the second resistor bar 221 is increased, thereby increasing the heating area and further improving the uniformity of heat transfer.

[0055] like Figure 2 As shown, the first resistor bar 211 is provided with three first heating short sections arranged in sequence along the circumferential direction; the second resistor bar 221 is provided with three second heating short sections arranged in sequence along the axial direction. The number of first heating short sections and second heating short sections is set according to the inner diameter of the cigarette, the required internal resistance, etc. Figure 2 This is just an example.

[0056] As an alternative implementation of the above embodiment, Figure 2 As shown, there are at least two first resistor bars 211, and the at least two first resistor bars 211 are spaced apart in the width direction of the flexible heat-resistant base film 10; and / or there are at least two second resistor bars 221, and the at least two second resistor bars 221 are spaced apart in the width direction of the flexible heat-resistant base film 10. At least two first resistor bars 211 extend in a serpentine shape from one end connected to the first pin 230 to be connected to the second conductive end, and are spaced apart in the width direction of the flexible heat-resistant base film 10; and / or at least two second resistor bars 221 extend in a serpentine shape from one end connected to the first pin 230 to be connected to the third pin 250, and are spaced apart in the width direction of the flexible heat-resistant base film 10; and furthermore, arranging multiple first resistor bars 211 and / or multiple second resistor bars 221 can increase the layout density of the heating surface of the heating plate, increase the heating area, and improve the uniformity of heat transfer.

[0057] As an alternative implementation of the above embodiment, Figure 2As shown, between two adjacent first resistor bars 211, at least a portion of the first heating short section of one of the first heating short sections is located between the first resistor segment 2111 and the third resistor segment 2113 of the other first heating short section; and / or between two adjacent second resistor bars 221, at least a portion of the second heating short section of one of the second heating short sections is located between the fourth resistor segment 2211 and the sixth resistor segment 2213 of the other second heating short section. That is, in the serpentine arrangement, the first resistor bar 211 will at least partially embed within the space between the first resistor segment 2111 and the third resistor segment 2113 of the other adjacent heating bar, thereby increasing the arrangement density of the first heating short sections and further contributing to improved thermal uniformity. And / or in the serpentine arrangement, the second resistor bar 221 will at least partially embed within the space between the fourth resistor segment 2211 and the sixth resistor segment 2213 of the other adjacent heating bar, thereby increasing the arrangement density of the first heating short sections and further contributing to improved thermal uniformity.

[0058] As an optional implementation of the above embodiment, Figure 1 As shown, the first pin 230, the second pin 240, and the third pin 250 extend from the same edge of the flexible heat-resistant base film 10 in the width direction. In this embodiment, the first pin 230, the second conductive end, and the third pin 250 are extended from the same edge of the flexible base film in the width direction. On the one hand, this facilitates the arrangement of the conductive ends at the same end after the heating tube 2 is fabricated and connected to the heating control circuit on the circuit board. On the other hand, this facilitates the arrangement of the first pin 230, the second conductive end, and the third pin 250 away from the upper cover 6 (for inserting cigarettes) in the heating device 1000, preventing the conductive ends from interfering with the normal insertion of cigarettes.

[0059] In the above embodiment, the segmented heating circuits of the heating element 20 are formed as a single unit, etched in a single process. This circuit is then pressed onto the flexible, heat-resistant base film 10 and then wound to form the heating tube 2. This allows for integrated assembly, simplifying the manufacturing process of the heating tube 2. Specifically, taking the circuit design of a two-segment heating element as an example, the first heating portion 210 and the second heating portion 220 are etched from the same metal sheet. The two circuits are connected via a shared first pin 230, meaning the first heating portion 210 and the second heating portion 220 are etched from the same metal material. The shared conductive terminal allows the upper and lower heating portions to be integrated prior to assembly, simplifying the manufacturing process of the heating element. When current is applied between the first pin 230 and the second pin 240, or between the first pin 230 and the third pin 250, the heating element forms two independent heating circuits. Current can flow through the first heating portion 210 and the second heating portion 220 in a time-sharing manner, enabling independent heating control in the two regions.

[0060] In the technical solution of the above embodiment, the heating sheet may further include a third heating part or more heating parts that can independently pass current. For example, the third heating part, the first heating part and the second heating part are commonly connected to the first conductive end. The heating sheet also includes a fourth conductive end, which is connected to the third heating part. That is: the heating component has two or more heating areas, which can provide segmented heating for the cigarette; the two or more heating areas can control the temperature in different time periods, and can provide support for local preheating or delayed heating of the cigarette, which saves energy compared to the heating of the overall tubular heating body.

[0061] In a second aspect, the present application also provides a heating pipe, which is formed by winding the heating pipe prefabricated structure 1 described in the previous embodiment. Figure 1 As shown, the prefabricated structure 1 of the heating tube is wound from the right side to the left side to form the heating tube. Figure 3 As shown. In some embodiments, the right side area of ​​the heating sheet is the second part 12 of the flexible heat-resistant base film 10, the area pressed against it is the first part 11 of the flexible heat-resistant base film 10, and the area on the left side of the heating sheet is the third part 13 of the flexible heat-resistant base film 10. When winding, the second part 12 is pre-formed into a cylindrical structure of one circle, and then wound from right to left to form a heating tube. After winding, the first heating part and the second heating part are between the first part 11 (corresponding to the inner wall 10a) and the second part 12 (corresponding to the outer wall 10b).

[0062] After the winding is completed, the length direction of the flexible heat-resistant base film 10 is the circumferential direction of the heating tube, and the width direction of the flexible heat-resistant base film 10 is the axial direction of the heating tube.

[0063] In a third aspect, the present application also provides a smoking device, comprising the aforementioned heating tube. The smoking device includes a heating device and a circuit board. Figure 7 As shown, the heating device includes an insulation tube 3, an outer shell 4, a lower cover 5, and an upper cover 6. The insulation tube 3 is mounted on the outside of the aforementioned heating tube and is located inside the outer shell 4. The lower cover 5 and upper cover 6 are respectively located at the two axial ends of the outer shell 4 and are fixed to the outer shell 4 via a first colloid 7 and a second colloid 8, respectively. The first colloid 7 and the second colloid 8 are thermosetting adhesives. In some embodiments, the interior of the heating tube directly forms a cigarette insertion channel S, meaning that the heating device is constructed without a heat transfer tube.

[0064] In an embodiment, the first pin, the second pin, and the third pin are respectively connected to a heating control circuit on a circuit board. The first pin, the second pin, and the third pin have a common connection end; the second pin and the third pin are respectively connected to the first heating part and the second heating part, and then the first heating part and the second heating part are connected in parallel. During segmented time-sharing heating, the heating control circuit can control the first pin, the first heating part, and the second pin to be turned on, and the first pin, the second heating part, and the third pin to be turned off; or the heating control circuit can control the first pin, the first heating part, and the second pin to be turned off, and the first pin, the second heating part, and the third pin to be turned on; or the first pin, the first heating part, and the second pin to be turned on, and the first pin, the second heating part, and the third pin to be turned on.

[0065] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A prefabricated structure for heating pipes, used for making heating pipes; characterized in that: include: A flexible heat-resistant base film, at least a portion of which is used to form the inner wall of the heating tube; and The heating sheet includes a first pin, a second pin, a third pin, a first heating part and a second heating part; the first heating part and the second heating part are both connected to the first pin; the second pin is connected to the first heating part, and the third pin is connected to the second heating part; the first heating part and the second heating part are adhered to the flexible heat-resistant base film and are spaced apart along the width direction of the flexible heat-resistant base film; the first pin, the second pin and the third pin extend out of the width edge of the flexible heat-resistant base film and are spaced apart along the length direction of the flexible heat-resistant base film.

2. The heating pipe prefabricated structure according to claim 1, characterized in that: The width of the heating sheet is b; the flexible heat-resistant base film has a first length edge in its length direction; the distance between the heating sheet and the first length edge is a; wherein a>b; When the heating element is wound into a heating tube, the portion between the heating sheet and the first length edge is wound into the inner wall of the heating sheet.

3. The heating pipe prefabricated structure according to claim 2, characterized in that: A positioning structure is provided at the first length edge.

4. The heating pipe prefabricated structure according to claim 1, wherein: The width of the heating sheet is b; the flexible heat-resistant base film has a second length edge in its length direction; the distance between the heating sheet and the second length edge is c; wherein c=Nb, N is greater than 1; When the heating element is wound into a heating tube, the portion between the heating sheet and the second length edge is wound outside the heating sheet.

5. The heating pipe prefabricated structure according to claim 1, wherein: The first heating portion includes a first resistor bar, wherein both ends of the first resistor bar are connected to the first pin and the second pin respectively; the first resistor bar includes at least one first resistor section, wherein the first resistor section includes a first resistor segment, a second resistor segment, and a third resistor segment connected end to end in sequence, wherein the first resistor segment and the third resistor segment are respectively formed from one end of the second resistor segment and extend in the same direction in the width direction of the flexible heat-resistant base film; and / or The second heating part includes a second resistor bar, the two ends of which are respectively connected to the first pin and the third pin; the second resistor bar includes at least one second resistor short section, the second resistor short section includes a fourth resistor segment, a fifth resistor segment and a sixth resistor segment connected end to end in sequence, and the fourth resistor segment and the sixth resistor segment are respectively extended in the same direction from one end of the fifth resistor segment in the width direction of the flexible heat-resistant base film.

6. The heat pipe prefabricated structure according to claim 5, characterized in that: The first resistor bar includes at least two first resistor short sections, and the at least two first resistor short sections are arranged in sequence along the length direction of the flexible heat-resistant base film; and / or the second resistor bar includes at least two second resistor short sections, and the at least two second resistor short sections are arranged in sequence along the length direction of the flexible heat-resistant base film.

7. The heat pipe prefabricated structure according to claim 5, characterized in that: There are at least two first resistor bars, and the at least two first resistor bars are spaced apart in the width direction of the flexible heat-resistant base film; and / or there are at least two second resistor bars, and the at least two second resistor bars are spaced apart in the width direction of the flexible heat-resistant base film.

8. The heat pipe prefabricated structure according to claim 1, wherein: The first pin, the second pin, and the third pin extend from the same edge of the flexible heat-resistant base film in the width direction; and / or The second pin and the third pin are located on the same side of the heating plate, and the first pin is located on the other side of the heating plate.

9. A heating pipe, characterized in that: The heating pipe is formed by winding the heating pipe prefabricated structure according to any one of claims 1 to 8.

10. A smoking article, characterized in that: The heat pipe according to claim 9 is included.

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