A heating element for low-temperature cigarettes and the low-temperature cigarette

Abstract

The present invention discloses a heating element for low-temperature cigarettes and the low-temperature cigarette, wherein the heating element for low-temperature cigarettes comprises a heating body, which is composed of a first heating section corresponding to the air inlet section of the tobacco part, a second heating section corresponding to the middle section of the tobacco part, and a third heating section corresponding to the air outlet section of the tobacco part, which are connected in sequence; along the length direction of the tobacco part, the heat power of the second heating section to a unit volume of tobacco is P, the heat power of the first heating section to a unit volume of tobacco is (3-8) P, and the heat power of the third heating section to a unit volume of tobacco is (1.5-4) P. In view of the different heat requirements for heating each section of the tobacco part of a cigarette to generate smoke, the present invention designs the heat power and length of the heating body in sections, so that the atomization and smoke output speed is fast, the tobacco part is not easy to be carbonized and burned, the smoke taste is consistent, and the user experience is good.

Description

Technical Field

[0001] The present invention particularly relates to a heating element for low-temperature cigarettes and the low-temperature cigarettes. Background Art

[0002] There are various low-temperature cigarettes that rely on heating elements to heat the tobacco part of the cigarette to produce smoke for users to inhale. In the prior art, the thermal power of each section of the heating element is the same along the length of the tobacco part. Since cold air is continuously replenished in the air intake section of the tobacco part, part of the heat of the heating element corresponding to the air intake section of the tobacco part is used to heat the cold air; the part of the heating element corresponding to the middle section of the tobacco part and the air outlet section of the tobacco part is only used to heat the tobacco without heating the cold air. Therefore, it is easy to have a long waiting time for smoke output or partial carbonization and burning, inconsistent smoke taste, and poor user experience. Summary of the invention

[0003] In the existing low-temperature cigarettes, the heat power of each section of the heating element is the same along the length of the tobacco part, which is prone to long waiting time for smoke output or partial carbonization and burning, inconsistent smoke taste, and poor user experience. The purpose of the present invention is to provide an improved heating element for low-temperature cigarettes and the low-temperature cigarette in view of the above-mentioned deficiencies in the prior art, which has fast atomization and smoke output speed, the tobacco part is not easy to be carbonized and burned, the smoke taste is consistent, and the user experience is good.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A low-temperature heating element for cigarettes comprises a heating body, and its structural feature is that the heating body is composed of a first heating section corresponding to an air inlet section of a tobacco section, a second heating section corresponding to an intermediate section of the tobacco section, and a third heating section corresponding to an air outlet section of the tobacco section, which are connected in sequence; along the length direction of the tobacco section, the heat power of the second heating section to a unit volume of tobacco is P, the heat power of the first heating section to a unit volume of tobacco is (3-8) P, and the heat power of the third heating section to a unit volume of tobacco is (1.5-4) P.

[0006] With the above structure, since the airflow entering the air inlet section of the tobacco part is cold air, the air inlet section of the tobacco part requires the first heating section to generate more heat to heat the cigarette, so as to prevent part of the heat from being absorbed by the cold air and affecting the atomization speed of the air inlet section of the tobacco part. Since the third heating section is close to the mouthpiece, the main function of the third heating section is to quickly heat the air outlet section of the tobacco part to produce smoke, so that the user can inhale the smoke at the initial moment of the electronic cigarette. In view of the different heat requirements for heating each section of the tobacco part of the cigarette to produce smoke, the present invention designs the thermal power of the heating body in sections. When in use, the heating body is arranged along the length direction of the tobacco part of the cigarette, the atomization and smoke output speed is fast, the tobacco part is not easy to carbonize and burn, the smoke taste is consistent, and the user experience is good.

[0007] As a preferred embodiment, the heat power of the first heating section to a unit volume of tobacco is (3-4)P, preferably 3P.

[0008] As a preferred embodiment, the heat power of the third heating section to a unit volume of tobacco is (2-3)P, preferably 2P.

[0009] In a preferred embodiment, the length of the first heating section is (1 / 6~1 / 3) of the length of the heating body, and the length of the second heating section is (3 / 4~1 / 2) of the length of the heating body; preferably, the length of the first heating section is 1 / 6 of the length of the heating body, and the length of the second heating section is 3 / 4 of the length of the heating body.

[0010] In another preferred embodiment, the length of the first heating section is (1 / 10~4 / 3) of the length of the heating body, and the length of the second heating section is (6 / 10~5 / 10) of the length of the heating body; preferably, the length of the first heating section is 1 / 10 of the length of the heating body, and the length of the second heating section is 6 / 10 of the length of the heating body.

[0011] In the above two schemes, the heat of the first heating section is sufficient to heat the air intake section of the atomized tobacco part to produce smoke and heat the cold air. The energy provided by the second heating section rises at a relatively slow rate, so the middle section of the tobacco part is heated more evenly, the heat preservation effect is better, and local overheating and carbonization can be prevented. Since the third heating section is close to the suction nozzle, the main function of the third heating section is to quickly heat the air outlet section of the tobacco part to produce smoke, so that the user can inhale the smoke at the initial moment of the electronic cigarette working. The third heating section should not be too long to avoid local rapid high temperature and burning and carbonization of the smoke outlet section. The third heating section can be slightly longer than the first heating section, so that the amount of smoke atomized is faster and larger.

[0012] As a preferred embodiment, the heat transfer tube is further included, the inner cavity of which is used to place the tobacco part of the cigarette, the heating body is a spring-shaped structure formed by winding the heating wire, and the heating body is sleeved outside the heat transfer tube. Corresponding to the thermal power, the winding pitch of the heating wire in the second heating section is a; the winding pitch of the heating wire in the first heating section is (3~8)a, preferably (3~4)a, and more preferably 3a; the winding pitch of the heating wire in the third heating section is (1.5~4)a, preferably (2~3)a, and more preferably 2a.

[0013] As another preferred embodiment, the heating body is a tubular structure formed by connecting multiple sections of heating sheets.

[0014] Compared with the first structure, the heating body of this structure can be an FPC flexible heating element, which has good flexibility and is easy to assemble.

[0015] Furthermore, a heat-conducting insulating substrate layer is provided on the surface of the heating body.

[0016] In this solution, during production, the heat-conducting insulating substrate layer and the multiple segments of heating sheets connected in sequence are first packaged into a flexible board, and then the flexible board is rolled into a tubular structure to form the heating element. Therefore, the processing technology is simpler, the production cost is lower, and the heat coverage is better.

[0017] Based on the same inventive concept, the present invention also provides a low-temperature cigarette, including a cigarette with a tobacco portion, and also including the heating body, wherein the heating body is arranged along the length direction of the tobacco portion and heats the tobacco portion to generate smoke.

[0018] Furthermore, it also includes a heat transfer tube, the heating body is a spring-shaped structure formed by winding a heating wire, and the heating body is sleeved outside the heat transfer tube; the tobacco part is placed in the inner cavity of the heat transfer tube; a base supporting the tobacco part is provided at the bottom of the heat transfer tube, and an air hole connecting the tobacco part and the air inlet channel is provided on the base.

[0019] Furthermore, a first air storage cavity communicating with the tobacco portion and the air hole is provided between the base and the tobacco portion.

[0020] By means of the above structure, the top surface of the base is provided with a recessed portion which is not in direct contact with the tobacco portion, so as to prevent the smoke flow from being blocked by the bottom of the tobacco portion during smoking and thus affecting the smoking effect.

[0021] Furthermore, it also includes an outer sleeve, in which the heating body and the heat transfer tube are fixed through a base. A battery is also provided in the outer sleeve below the heating body, and a second air storage cavity connected to the air hole and the air inlet channel is provided between the base and the battery.

[0022] With the above structure, the second air storage cavity can not only prevent the air passage from being blocked by the debris, but also play a role in heat insulation or heat dissipation, preventing heat from being directly transferred to the battery and affecting the battery life.

[0023] Furthermore, a heat insulation mechanism which is sleeved on the outside of the heating body is also provided in the outer sleeve.

[0024] As a preferred embodiment, the thermal insulation mechanism includes a first thermal insulation tube and a second thermal insulation tube in an outer sleeve, and the first thermal insulation tube is sleeved between the second thermal insulation tube and the heating body.

[0025] As a preferred embodiment, the air inlet passage is provided between the first thermal insulation tube and the second thermal insulation tube.

[0026] Furthermore, a heat-insulating cavity is provided between the second heat-insulating tube and the outer sleeve.

[0027] The arrangement of the air inlet channel and the heat insulation cavity can further reduce the heat transferred to the outer sleeve, prevent burns, and provide a good user experience.

[0028] Compared with the prior art, the present invention designs the thermal power and length of the heating body in sections according to the different heat requirements for heating the tobacco section of a cigarette to generate smoke. The atomization and smoke output speed is fast, the tobacco section is not easily carbonized or burnt, the smoke taste is consistent, and the user experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of a first embodiment of a heating element.

[0030] Figure 2 It is a schematic diagram of the structure of the second embodiment of the heating element unfolded from the busbar.

[0031] Figure 3 This is a schematic diagram of the structure of the third heating element embodiment unfolded from the busbar.

[0032] Figure 4 It is a schematic diagram of the structure of an embodiment of low-temperature smoke.

[0033] Figure 5 for Figure 4 Schematic diagram of the structure after taking out the cigarette.

[0034] Figure 6 for Figure 4 Exploded diagram.

[0035] Figure 7 It is a relationship diagram between the heating temperature and heating time of each section of the tobacco portion of the present invention.

[0036] Among them, 1 is a cigarette, 101 is a tobacco part, 2 is a heating body, 201 is a first heating section, 202 is a second heating section, 203 is a third heating section, 3 is a heat transfer tube, 4 is an insulating substrate layer, 5 is a base, 501 is an air hole, 6 is an air inlet channel, 7 is a first gas storage cavity, 8 is an outer sleeve, 9 is a battery, 10 is a second gas storage cavity, 11 is a first insulation tube, 1101 is an air inlet, 12 is a second insulation tube, 13 is an insulation cavity, 14 is a bracket, 15 is a control panel, 16 is a button, 17 is a spring, and 18 is a bottom cover. DETAILED DESCRIPTION

[0037] Heat generating element embodiment 1

[0038] like Figure 1As shown, the low-temperature cigarette heating element includes a heating body 2 arranged along the length direction of the tobacco portion 101 of the cigarette 1, and the heating body 2 is composed of a first heating section 201 corresponding to the air inlet section of the tobacco portion 101, a second heating section 202 corresponding to the middle section of the tobacco portion 101, and a third heating section 203 corresponding to the air outlet section of the tobacco portion 101, which are connected in sequence; along the length direction of the tobacco portion 101, the thermal power of the second heating section 202 to a unit volume of tobacco is P.

[0039] The heat power of the first heating section 201 to a unit volume of tobacco is (3-8)P, preferably (3-4)P, and more preferably 3P.

[0040] The heat power of the third heating section 203 to a unit volume of tobacco is (1.5-4)P, preferably (2-3)P, and more preferably 2P.

[0041] The length of the first heating section 201 is (1 / 6~1 / 3) of the length of the heating body 2, and the length of the second heating section 202 is (3 / 4~1 / 2) of the length of the heating body 2; preferably, the length of the first heating section 201 is 1 / 6 of the length of the heating body 2, and the length of the second heating section 202 is 3 / 4 of the length of the heating body 2.

[0042] The heating element also includes a heat transfer tube 3 with an inner cavity for placing the tobacco portion 101 of the cigarette 1. The heating body 2 is a spring-shaped structure formed by winding a heating wire, and the heating body 2 is sleeved outside the heat transfer tube 3.

[0043] Corresponding to the thermal power, the winding pitch of the heating wire in the second heating section 202 is a; the winding pitch of the heating wire in the first heating section 201 is (3~8)a, preferably (3~4)a, and more preferably 3a; the winding pitch of the heating wire in the third heating section 203 is (1.5~4)a, preferably (2~3)a, and more preferably 2a.

[0044] Heat generating element embodiment 2

[0045] like Figure 2 As shown, in embodiment 2, the low-temperature cigarette heating element includes a heating body 2 arranged along the length direction of the tobacco portion 101 of the cigarette 1, and the heating body 2 is composed of a first heating segment 201 corresponding to the air inlet segment of the tobacco portion 101, a second heating segment 202 corresponding to the middle segment of the tobacco portion 101, and a third heating segment 203 corresponding to the air outlet segment of the tobacco portion 101, which are connected in sequence; along the length direction of the tobacco portion 101, the thermal power of the second heating segment 202 to a unit volume of tobacco is P.

[0046] The heat power of the first heating section 201 to a unit volume of tobacco is (3-8)P, preferably (3-4)P, and more preferably 3P.

[0047] The heat power of the third heating section 203 to a unit volume of tobacco is (1.5-4)P, preferably (2-3)P, and more preferably 2P.

[0048] The length of the first heating section 201 is (1 / 10~4 / 3) of the length of the heating body 2, and the length of the second heating section 202 is (6 / 10~5 / 10) of the length of the heating body 2; preferably, the length of the first heating section 201 is 1 / 10 of the length of the heating body 2, and the length of the second heating section 202 is 6 / 10 of the length of the heating body 2.

[0049] The heating body 2 is a tubular structure formed by connecting multiple sections of heating sheets. Figure 2 The figure shows a schematic diagram of the structure of the second embodiment of the heating element unfolded from the busbar. During assembly, the heating element is rolled up to form a tubular structure that can accommodate the tobacco portion 101 .

[0050] Heat generating element embodiment 3

[0051] like Figure 3 As shown, based on the second embodiment, the surface of the heating body is further provided with a heat-conducting insulating substrate layer 4. Figure 3 The figure shows a schematic diagram of the structure of the third embodiment of the heating element unfolded from the busbar. When manufacturing, the heat-conducting insulating substrate layer 4 and the multiple heating sheets connected in sequence are first packaged into a flexible board, and then the flexible board is rolled into a tubular structure that can accommodate the tobacco part 101, that is, the heating element is formed. When the user replaces the cigarette, the cigarette can be inserted and removed more smoothly, and the inner wall of the flexible board is convenient to clean.

[0052] Low temperature smoke embodiment

[0053] like Figures 4 to 6 As shown, the low-temperature cigarette includes a cigarette stick 1 having a tobacco portion 101, and also includes the heating body described in the first embodiment. The heating body 2 is arranged along the length direction of the tobacco portion 101 and heats the tobacco portion 101 to generate smoke.

[0054] The tobacco portion 101 is placed in the inner cavity of the heat transfer tube 3 ; a base 5 for supporting the tobacco portion 101 is provided at the bottom of the heat transfer tube 3 , and an air hole 501 connecting the tobacco portion 101 and the air inlet channel 6 is provided on the base 5 .

[0055] A first air storage cavity 7 communicating with the tobacco portion 101 and the air hole 501 is disposed between the base 5 and the tobacco portion 101 .

[0056] The low-temperature smoke also includes an outer sleeve 8, in which the heating body 2 and the heat transfer tube 3 are fixedly arranged through the base 5. A battery 9 is also provided in the outer sleeve 8 below the heating body 2, and a second air storage cavity 10 connected to the air hole 501 and the air inlet channel 6 is provided between the base 5 and the battery 9.

[0057] The outer sleeve 8 is also provided with a heat insulation mechanism which is sleeved outside the heating body 2 .

[0058] The heat insulation mechanism includes a first heat insulation tube 11 and a second heat insulation tube 12 in the outer sleeve 8 , and the first heat insulation tube 11 is sleeved between the second heat insulation tube 12 and the heating body 2 .

[0059] The air intake passage 6 is provided between the first thermal insulation tube 11 and the second thermal insulation tube 12 .

[0060] A heat insulation cavity 13 is provided between the second heat insulation tube 12 and the outer sleeve 8 .

[0061] An air inlet hole 1101 connecting the outside with the air inlet passage 6 is provided at the top of the first heat insulation tube 11 . Figure 5 The direction indicated by the arrow is the direction of airflow.

[0062] A bracket 14 is provided inside the outer sleeve 8 and is located between the battery 9 and the heating body 2. A control board 15 for controlling whether the heating element is working is fixed on the bracket 14, and a button 16 for controlling the control board 15 to be turned on or off is provided on the side wall of the outer sleeve 8. A spring 17 is provided between the button 16 and the control board 15, one end of the spring 17 passes through the side wall of the bracket 14 and abuts against the control board 15, and the other end of the spring 17 abuts against the button 16.

[0063] A bottom cover 18 is provided at the bottom of the outer sleeve 8 for sealing.

[0064] Test results

[0065] When the length of the first heating section 201 is 1 / 6 of the length of the heating body 2, the length of the second heating section 202 is 3 / 4 of the length of the heating body 2, and the length of the third heating section 203 is 1 / 12 of the length of the heating body 2, and at the same time, the winding pitch of the heating wire in the second heating section 202 is a, the winding pitch of the heating wire in the first heating section 201 is 3a, and the winding pitch of the heating wire in the third heating section 203 is 2a, the relationship between the heating temperature and the heating time of each section of the tobacco portion 101 in the low-temperature cigarette of the present invention is as follows: Figure 7 shown. Figure 7 middle, , , The curves respectively represent the relationship between the heating temperature and the heating time of the air inlet section of the tobacco section 101, the middle section of the tobacco section 101, and the air outlet section of the tobacco section 101.

[0066] Depend on Figure 7It can be seen that the density of each heating wire winding is related to the time required for the temperature to rise. The higher the winding density, the faster the heating speed. When the temperature reaches the preset temperature, the temperature of the section is maintained within the preset temperature range by software control in the low-temperature smoke. If the preset value is 250°, the time required for the tobacco section 101 outlet section to reach 250° is the shortest, that is, the smoke output speed is the fastest; the tobacco section 101 air intake section is second, because when smoking, cold air passes through and takes away part of the heat, so it is slower to reach the preset temperature; the middle section of the tobacco section 101 is the slowest, because the density of the second heating section 202 winding the heating wire is small and the heated area is longer, so the heating speed is relatively slow. Judging from the length of time it takes to reach the preset temperature through these three sections, the amount of smoke in each time period is just replenished in time, which can prevent the user from choking due to inconsistent smoke volume in each puff.

[0067] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A low-temperature heating element for cigarettes, comprising a heating body (2), characterized in that: The heating body (2) is composed of a first heating section (201) corresponding to the air inlet section of the tobacco section (101), a second heating section (202) corresponding to the middle section of the tobacco section (101), and a third heating section (203) corresponding to the air outlet section of the tobacco section (101), which are connected in sequence; along the length direction of the tobacco section (101), the heat power of the second heating section (202) to a unit volume of tobacco is P, the heat power of the first heating section (201) to a unit volume of tobacco is (3-8) P, and the heat power of the third heating section (203) to a unit volume of tobacco is (1.5-4) P; The length of the first heating section (201) is (1 / 6 to 1 / 3) of the length of the heating body (2), and the length of the second heating section (202) is (3 / 4 to 1 / 2) of the length of the heating body (2); or, the length of the first heating section (201) is 1 / 10 of the length of the heating body (2), and the length of the second heating section (202) is (6 / 10 to 5 / 10) of the length of the heating body (2).

2. The low-temperature heating element for cigarettes according to claim 1, characterized in that: The heat power of the first heating section (201) to a unit volume of tobacco is (3-4)P.

3. The low-temperature heating element for cigarettes according to claim 2, characterized in that: The thermal power of the first heating section (201) to a unit volume of tobacco is 3P.

4. The low-temperature heating element for cigarettes according to claim 1, characterized in that: The heat power of the third heating section (203) to a unit volume of tobacco is (2-3)P.

5. The low-temperature heating element for cigarettes according to claim 4, characterized in that: The heat power of the third heating section (203) per unit volume of tobacco is 2P.

6. The low-temperature heating element for cigarettes according to any one of claims 1 to 5, characterized in that: The length of the first heating section (201) is 1 / 6 of the length of the heating body (2), and the length of the second heating section (202) is 3 / 4 of the length of the heating body (2).

7. The low-temperature heating element for cigarettes according to any one of claims 1 to 5, characterized in that: The length of the first heating section (201) is 1 / 10 of the length of the heating body (2), and the length of the second heating section (202) is 6 / 10 of the length of the heating body (2).

8. The low-temperature heating element for cigarettes according to any one of claims 1 to 5, characterized in that: It also comprises a heat transfer tube (3) whose inner cavity is used to place the tobacco portion (101) of the cigarette (1); the heating body (2) is a spring-shaped structure formed by winding a heating wire; the heating body (2) is sleeved outside the heat transfer tube (3).

9. The low-temperature heating element for cigarettes according to any one of claims 1 to 5, characterized in that: The heating body (2) is a tubular structure formed by connecting a plurality of heating sheets.

10. The low-temperature heating element for cigarettes according to claim 9, characterized in that: The surface of the heating body (2) is provided with a heat-conducting insulating substrate layer (4).

11. A low-temperature cigarette, comprising a cigarette stick (1) having a tobacco portion (101), characterized in that: It also comprises a heating body as claimed in any one of claims 1 to 10, wherein the heating body (2) is arranged along the length direction of the tobacco portion (101) and heats the tobacco portion (101) to generate smoke.

12. The low-temperature smoke according to claim 11, characterized in that: It also comprises a heat transfer tube (3), the heating body (2) being a spring-shaped structure formed by winding a heating wire, the heating body (2) being sleeved outside the heat transfer tube (3); the tobacco portion (101) being placed in the inner cavity of the heat transfer tube (3); a base (5) for supporting the tobacco portion (101) being provided at the bottom of the heat transfer tube (3), and an air hole (501) for connecting the tobacco portion (101) and the air inlet channel (6) being provided on the base (5).

13. The low-temperature smoke according to claim 12, characterized in that: A first air storage cavity (7) communicating with the tobacco portion (101) and the air hole (501) is provided between the base (5) and the tobacco portion (101).

14. The low-temperature smoke according to claim 12 or 13, characterized in that: The device further comprises an outer sleeve (8), wherein the heating body (2) and the heat transfer tube (3) are fixedly arranged in the outer sleeve (8) via a base (5), and a battery (9) is also arranged in the outer sleeve (8) below the heating body (2), and a second air storage cavity (10) is arranged between the base (5) and the battery (9) and is connected to the air hole (501) and the air inlet channel (6).

15. The low-temperature smoke according to claim 14, characterized in that: The outer sleeve (8) is also provided with a heat insulation mechanism which is sleeved on the outside of the heating body (2).

16. The low-temperature smoke according to claim 15, characterized in that: The heat insulation mechanism comprises a first heat insulation tube (11) and a second heat insulation tube (12) inside an outer sleeve (8); the first heat insulation tube (11) is sleeved between the second heat insulation tube (12) and the heating body (2).

17. The low-temperature smoke according to claim 16, characterized in that: The air inlet passage (6) is provided between the first thermal insulation tube (11) and the second thermal insulation tube (12).

18. The low-temperature smoke according to claim 16, characterized in that: A heat-insulating cavity (13) is provided between the second heat-insulating tube (12) and the outer sleeve (8).

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