A circumferentially heated non-burning smoking device and a heat insulation system for its heating component

Abstract

The present invention discloses a circumferentially heated non-combustion smoking device and a heat insulation system of a heating component thereof in the technical field of heated smoking devices. The smoking device comprises a heating tube and a heat insulation tube. The upper and lower ends of the heating component are respectively fixedly connected to a support member. The upper and lower ends of the heating tube and the heat insulation tube are respectively in point contact / line contact with the support member. There is a gap between the heating tube and the heat insulation tube. The heating tube, the heat insulation tube and the upper and lower support members are sealed to form a main closed air chamber. The support member is provided with a plurality of laterally distributed support ribs. The support ribs are sleeved in the heat insulation tube and a gap is left between the outer edge of the support ribs and the inner wall of the heat insulation tube, so that a plurality of support closed air chambers are formed between the support member and the inner wall of the heat insulation tube. The present invention has a small heat conduction loss, a low heat conduction efficiency, a short preheating time for the smoking device, a high energy utilization rate, and will not cause the temperature of the product shell to rise, thereby ensuring a good user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of heated smoking articles, and in particular to a circumferentially heated non-burning smoking article and a heat insulation system of a heating component thereof. Background Art

[0002] With the rapid development of heat-not-burn cigarettes, more and more tobacco products are being used. Traditional heat-not-burn tobacco products cannot completely heat and burn cigarettes, but circumferential heating technology can solve this problem. Existing circumferential heat-not-burn tobacco products use heating films to heat metal tubes. Heat-not-burn cigarettes are inserted into the metal tubes and heated by the surrounding metal tubes. A vacuum insulation tube is used on the outside of the heating film to prevent the heat from leaking out of the heating film. However, this type of tobacco product technology is also imperfect, which can easily lead to defects such as high shell temperature, long preheating time, and low energy utilization.

[0003] The reason is that the insulation effect of the heating component is poor. The thermal resistance of the whole product is small, and a large amount of heat is dissipated outward through conduction; and because the air in the high temperature zone cannot be sealed, the high temperature air leaks outward; at the same time, there is no temperature transition zone between the high temperature zone and the normal temperature zone, and the heat conduction loss is serious.

[0004] The above defects are worth solving. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a circumferentially heated non-burning smoking device and an insulation system for a heating component thereof.

[0006] The technical solution of the present invention is as follows:

[0007] A heat insulation system for a heating component of a circumferentially heated non-combustion smoking device, wherein the heating component comprises a heating tube and a heat insulation tube sleeved outside the heating tube, wherein the upper and lower ends of the heating component are respectively fixedly connected to a support member;

[0008] The upper and lower ends of the heating pipe and the insulating pipe are respectively in point contact / line contact with the support member, a gap is provided between the heating pipe and the insulating pipe, and the heating pipe, the insulating pipe and the upper and lower supporting members are sealed to form a main closed air chamber;

[0009] The support member is provided with a plurality of support ribs distributed laterally, the support ribs are sleeved in the insulation tube and a gap is left between the outer edge of the support ribs and the inner wall of the insulation tube, so that a plurality of support closed air chambers are formed between the support member and the inner wall of the insulation tube.

[0010] The present invention according to the above scheme is characterized in that the outer side of the end of the heating pipe is in point contact with a plurality of first supporting ribs on the inner wall of the support member; or the end of the heating pipe is in line contact with the first supporting surface on the support member.

[0011] The present invention according to the above scheme is characterized in that the end of the insulation tube is in point contact with a plurality of second support ribs on the inner wall of the support member; or the end of the insulation tube is in line contact with the second support surface on the support member.

[0012] The present invention according to the above scheme is characterized in that a plurality of support columns are provided at the end or outer side of the support member / the heating pipe / the insulating pipe, and the support member / the heating pipe / the insulating pipe is in point contact with the external structural member through the support columns;

[0013] The ends of the support member / the heating pipe / the insulating pipe are provided with protruding external ribs, and the support member / the heating pipe / the insulating pipe is in line contact with the external structural member through the external ribs.

[0014] The present invention according to the above solution is characterized in that the material of the support member is PEEK material.

[0015] The present invention according to the above scheme is characterized in that the upper and lower ends of the insulating tube protrude from the upper and lower ends of the heating tube, so that the upper and lower ends of the heating tube are connected to the end of the support member, and the supporting rib is sleeved inside the insulating tube.

[0016] Furthermore, the length of the insulation tube is at least 6 mm longer than the length of the heating tube.

[0017] The present invention according to the above scheme is characterized in that the insulating pipe includes an insulating inner wall and an insulating outer wall spaced apart from each other, and the length of the insulating inner wall is greater than the length of the insulating outer wall, so that the insulating pipe is connected to the support member through the insulating inner wall.

[0018] The present invention according to the above scheme is characterized in that a support groove is provided at the end of the support member, and the end of the heating pipe extends into the support groove and is connected to the support groove.

[0019] The present invention according to the above scheme is characterized in that the support member includes an upper support member and a lower support member, the upper end of the heating component is connected to the outer shell through the upper support member, and the lower end of the heating component is connected to the outer shell through the lower support member.

[0020] Furthermore, a hollow flue is provided inside the upper support member, and a hollow air duct is provided inside the lower support member. The inner diameter of the flue is larger than the inner diameter of the air duct, so that the width of the support ribs of the upper support member is smaller than the width of the support ribs of the lower support member.

[0021] Furthermore, at least two upper support ribs protruding outward are provided on the outer side of the lower end of the upper support member, so that at least one upper support closed air chamber is formed between two adjacent upper support ribs and the inner wall of the insulation pipe.

[0022] Furthermore, three upper supporting ribs are provided on the outer side of the lower end of the upper supporting member.

[0023] Furthermore, at least two lower support ribs protruding outward are provided on the outer side of the upper end of the lower support member, so that at least one lower support closed air chamber is formed between two adjacent lower support ribs and the inner wall of the insulation pipe.

[0024] Furthermore, three lower supporting ribs are provided on the outer side of the upper end of the lower supporting member.

[0025] The present invention according to the above solution is characterized in that the wall thickness of the heating tube is 0.1-0.2 mm;

[0026] And / or, the wall thickness of the thermal insulation pipe is 0.1-0.2 mm;

[0027] And / or, the axial wall thickness of the support member is 0.4-1.0 mm;

[0028] And / or, the width of the gap between the outer edge of the supporting rib and the inner wall of the insulation pipe is 0.05-0.15 mm.

[0029] On the other hand, a circumferentially heated non-burning smoking device comprises a shell, characterized in that an insulation system of the heating component of the circumferentially heated non-burning smoking device is arranged inside the shell.

[0030] The present invention according to the above scheme has the beneficial effect that the present invention isolates most of the heat through the main closed air chamber, and a small part of the heat is sequentially transferred through multiple supporting closed air chambers, so that the heat conduction loss is small; in addition, the heat dissipation position in the present invention is connected by point contact / line contact, so that the thermal resistance is large and the heat conduction efficiency is reduced. The present invention achieves a short preheating time for the smoking device and a high energy utilization rate, and at the same time does not cause the temperature of the product shell to rise, ensuring a good experience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention.

[0032] Figure 2 for Figure 1 Enlarged view of part A.

[0033] Figure 3 for Figure 2 Magnified view of part C.

[0034] Figure 4 for Figure 1 Magnified view of part B.

[0035] Figure 5 for Figure 4 Enlarged view of part D.

[0036] Figure 6 Schematic diagram of point contact between the upper support and the heating tube.

[0037] Figure 7 Schematic diagram of line contact between the upper support and the heating tube.

[0038] Figure 8 Schematic diagram of point contact between the upper support and the insulation pipe.

[0039] Fig. 9 It is an enlarged view of the point contact between the upper support and the insulation pipe.

[0040] Fig.10 Schematic diagram of line contact between the upper support and the insulation pipe.

[0041] Fig.11 It is an enlarged view of the line contact between the upper support and the insulation pipe.

[0042] Fig.12 Schematic diagram of point contact between the upper support member and the external structural member.

[0043] Fig.13 Schematic diagram of point contact and line contact between the upper support member and the external structural member.

[0044] Fig.14 This is the air flow diagram of the present invention.

[0045] In the figure, 10, housing; 11, bottom cover; 12, partition plate;

[0046] 20. Heating pipe; 21. Main closed air chamber;

[0047] 30. Insulated pipe; 31. Insulated inner wall; 32. Insulated outer wall;

[0048] 40. upper support member; 401. upper support rib; 402. flue; 4031. first support rib; 4032. first support surface; 4041. second support rib; 4042. second support surface; 4051. first support column; 4052. second support column; 4053. external rib; 41. first upper support closed air chamber; 42. second upper support closed air chamber; 43. third upper support closed air chamber; 44. upper support groove;

[0049] 50. Lower support member; 501. Lower support rib; 502. Air guide tube; 51. First lower support sealed air chamber; 52. Second lower support sealed air chamber; 53. Third lower support sealed air chamber; 54. Lower support groove;

[0050] 61. PCB board; 62. Battery;

[0051] 70. Cigarette. DETAILED DESCRIPTION

[0052] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0053] like Figure 1 As shown, a circumferential heating non-burning smoking device includes a shell 10, and a bottom cover 11 is provided at the bottom of the shell 10. A partition plate 12 is provided inside the shell 10, and the partition plate 12 divides the space inside the shell 10 into an electric control chamber and a heating chamber. Among them, a PCB board 61 and a battery 62 are provided in the electric control chamber, and the battery 62 is connected to the PCB board 61 and supplies power to it; a heating component is provided in the heating chamber, and the heating component is connected to the PCB board 61, and the PCB board 61 controls the heating component to generate heat.

[0054] The heating component includes a heating tube 20 and an insulating tube 30 sleeved on the outside of the heating tube 20. The upper and lower ends of the heating component are respectively fixedly connected to the support members, and the support members are fixed on the outer shell 10 of the circumferential heat-not-burn smoking device, or the support members are connected to other external structural members in the outer shell 10. The heating component is supported and fixed by two support members, ensuring that the cigarette 70 can be well limited in the circumferential heat-not-burn smoking device.

[0055] In the circumferentially heated non-burning smoking device, the defects of poor air tightness and poor thermal insulation effect of the heated non-burning smoking device are improved by an insulation system of the heating component of the circumferentially heated non-burning smoking device. Specifically: there is a gap between the heating tube 20 and the insulating tube 30, and the upper and lower ends of the heating tube 20 and the insulating tube 30 are respectively in point contact / line contact with the support member, and the heating tube 20, the insulating tube 30 and the upper and lower supports are sealed to form a main closed air chamber 21. The heat emitted from the outer wall of the heating tube 20 is sealed inside the main closed air chamber 21 and will not leak out. In addition, the double-layer insulating tube 30 on the outside of the main closed air chamber 21 achieves the isolation of internal heat.

[0056] In addition, the support member is made of a high temperature resistant plastic material (preferably PEEK material), which fully reduces the heat transferred through the support member. In this embodiment, the support member includes an upper support member 40 and a lower support member 50, the upper end of the heating component is connected to the housing 10 or the external structure through the upper support member 40, and the lower end of the heating component is connected to the housing 10 or the external structure through the lower support member 50.

[0057] Preferably, the upper and lower ends of the insulating tube 30 protrude from the upper and lower ends of the heating tube 20, so that the upper and lower ends of the heating tube 20 are connected to the ends of the support member, and part of the support member is sleeved inside the insulating tube 30, so that a plurality of small relatively closed supporting airtight chambers are formed between the inner wall of the insulating tube 30 and the support member. In this embodiment, the length of the insulating tube 30 is at least 6 mm longer than the length of the heating tube 20, and the inner diameter of the insulating tube is more than 2 mm larger than the outer diameter of the heating tube 20, which not only fully saves the space inside the smoking device, but also ensures the mutual support and resistance effect between the heating tube 20, the insulating tube 30 and the support member.

[0058] Preferably, a hollow flue 402 is provided inside the upper support 40, and a hollow air guide tube 502 is provided inside the lower support 50. The inner diameter of the flue 402 is larger than the inner diameter of the air guide tube 502, so that the width of the support ribs of the upper support 40 is smaller than the width of the support ribs of the lower support 50. Since the temperature of the lower end of the cigarette 70 is higher than the temperature of the upper end thereof, the size design of the upper support rib 401 and the lower support rib 501 conforms to the distribution form of heat during the flow of smoke.

[0059] The end of the support member in the present invention is provided with a support groove, and the end of the heating tube 20 extends into the support groove and is in contact with and connected to the support groove. The support member is provided with a plurality of support ribs distributed laterally, and a gap is left between the outer edge of the support rib and the inner wall of the insulating tube 30, so that a plurality of support closed air chambers are formed between the support member and the inner wall of the insulating tube 30, wherein a support closed air chamber is formed between two adjacent support ribs and the inner wall of the insulating tube 30, and the inner wall of the insulating tube 30, the position of the support member connected to the insulating tube 30, and the support ribs adjacent to the connection position form another support closed air chamber. Specifically:

[0060] like Figure 1 , Figure 2 As shown, at least two upper support ribs 401 protruding outward are provided on the outer side of the lower end of the upper support member 40 , so that at least one upper support closed air chamber is formed between two adjacent upper support ribs 401 and the inner wall of the insulation pipe 30 .

[0061] In this embodiment, three thin-walled upper support ribs 401 are provided on the outer side of the lower end of the upper support member 40. Extending from the bottom to the top: the first upper support rib 401, the second upper support rib 401 and the inner wall of the insulation tube 30 are sealed to form the first upper support closed air chamber 41; the second upper support rib 401, the third upper support rib 401 and the inner wall of the insulation tube 30 are sealed to form the second upper support closed air chamber 42; the third upper support rib 401, the position in contact with the top of the insulation tube 30, and the inner wall of the insulation tube 30 are sealed to form the third upper support closed air chamber 43. Each upper support closed air chamber is used to isolate the air, so that the air can only convect in each upper support closed air chamber, so that the heat in the high temperature area can only be conducted out through the upper support closed air chamber, and the temperature gradually decreases from the second upper support closed air chamber 42, which greatly reduces the leakage of heat.

[0062] In this embodiment, the upper support member 40 is provided with an upper support groove 44 at the lower opening of the flue 402, and the upper end of the heating pipe 20 extends upward into the upper support groove 44. Since the wall of the heating pipe 20 is very thin, the contact surface between the heating pipe 20 and the upper support groove 44 is very small, so that the thermal resistance becomes larger, further reducing the heat conducted to the upper support member 40.

[0063] like Figure 1 , Figure 4 As shown, at least two lower support ribs 501 protruding outward are provided on the outer side of the upper end of the lower support member 50 , so that at least one lower support closed air chamber is formed between two adjacent lower support ribs 501 and the inner wall of the insulation pipe 30 .

[0064] In this embodiment, three thin-walled lower support ribs 501 are provided on the outer side of the upper end of the lower support member 50. Extending from the top to the bottom: the first lower support rib 501, the second lower support rib 501 and the inner wall of the insulation tube 30 are sealed to form the first lower support closed air chamber 51; the second lower support rib 501, the third lower support rib 501 and the inner wall of the insulation tube 30 are sealed to form the second lower support closed air chamber 52; the third lower support rib 501, the position in contact with the top of the insulation tube 30, and the inner wall of the insulation tube 30 are sealed to form the third lower support closed air chamber 53. Each lower support closed air chamber is used to isolate the air, so that the air can only convect in each lower support closed air chamber, so that the heat in the high temperature area can only be conducted out through the lower support closed air chamber, and the temperature gradually decreases from the second lower support closed air chamber 52, which greatly reduces the leakage of heat.

[0065] In this embodiment, the lower support member 50 is provided with a lower support groove 54 at the lower end opening of the flue 402, and the lower end of the heating pipe 20 extends downward into the lower support groove 54. Since the wall of the heating pipe 20 is very thin, the contact surface between the heating pipe 20 and the lower support groove 54 is very small, so that the thermal resistance becomes larger, and the heat conducted to the lower support member 50 is further reduced.

[0066] like Figure 2-Figure 5 As shown, the heat-insulating pipe 30 includes a heat-insulating inner wall and a heat-insulating outer wall 32 spaced apart from each other, and the length of the heat-insulating inner wall 31 is greater than the length of the heat-insulating outer wall 32, so that the heat-insulating pipe 30 is connected to the support member through the heat-insulating inner wall 31. The top of the heat-insulating inner wall 31 is used as the installation part, and its contact area is very small, forming a line contact mode, resulting in a large thermal resistance, and then the heat conducted to the upper support member 40 or the lower support member 50 is very small.

[0067] like Figures 6 to 13 As shown, when the heating tube 20 and the insulating tube 30 are insulated by the main closed air chamber 21 and several supporting closed air chambers, in order to further reduce the heat conduction between the support and the insulating tube 30 / heating tube 20 and reduce heat leakage, point contact / line contact, micro-interval method and reducing wall thickness are used to reduce heat conduction.

[0068] 1. Point contact / line contact

[0069] Point contact or line contact is used between the support and the insulation tube 30 / heating tube 20, and between the support and the housing 10 or other external structural parts to reduce heat conduction. Specifically:

[0070] like Figure 6 As shown, the outer side of the end of the heating tube 20 is in point contact with a plurality of first supporting ribs 4031 on the inner wall of the supporting member;

[0071] like Figure 7 As shown, the end of the heating pipe 20 is in line contact with the first supporting surface 4032 on the supporting member;

[0072] like Figure 8 , Fig. 9 As shown, the end of the insulation pipe 30 is in point contact with a plurality of second support ribs 4041 on the inner wall of the support member;

[0073] like Fig.10 , Fig.11 As shown, the end of the thermal insulation pipe 30 is in line contact with the second support surface 4042 on the support member;

[0074] like Fig.12 , Fig.13 As shown, a plurality of support columns (including a first support column 4051 and a second support column 4052) are provided at the end or outer side of the support member / heating tube 20 / insulating tube 30, and the support member / heating tube 20 / insulating tube 30 is in point contact with the external structural member through the support columns;

[0075] like Fig.13As shown, the end of the support member / heating pipe 20 / insulating pipe 30 is provided with a protruding external rib 4053, and the support member / heating pipe 20 / insulating pipe 30 is in line contact with the external structural member through the external rib 4053.

[0076] 2. Micro-interval method

[0077] In this embodiment, the gap width between the outer edge of the support rib and the inner wall of the insulation tube 30 is 0.05-0.15mm. The tiny gap between the support member and the insulation tube 30 can not only ensure that the two do not contact each other, but also ensure the relative airtightness between each supporting closed air chamber, so that the hot air in the air chamber will not flow out.

[0078] 3. Reduce wall thickness

[0079] According to the characteristics of each part and material, the wall thickness of the parts on each heat transfer path should be reduced as much as possible, which can effectively and maximize the thermal resistance on the heat transfer path.

[0080] In this embodiment: the wall thickness of the heating tube 20 is 0.1-0.2 mm; the wall thickness of the insulation tube 30 is 0.1-0.2 mm; the axial wall thickness of the support member is 0.4-1.0 mm;

[0081] like Fig.14 As shown, with the air flowing in the smoking device, the design of each supporting closed air chamber of the present invention makes the air temperature gradually decrease, greatly reducing the heat leakage; at the same time, with the thermal resistance design inside the product, the temperature outside the heating component is further reduced. Specifically:

[0082] The assembly positions of the heating tube 20, the insulating tube 30, the upper support member 40 and the lower support member 50 adopt point contact or line contact, which greatly increases the thermal resistance of the heat conduction path between the parts; the matching interval size between each support rib is small, ensuring that no contact is generated except the contact point between the support rib and the inner wall of the insulating tube 30, and the hot air in the air chamber will not flow out; along the direction of heat transfer, the wall thickness of the insulating tube 30 and the wall thickness of each support rib on the path are small, which can effectively and maximize the thermal resistance of the heat transfer path; the wall of the insulating tube 30 and the wall of the heating tube are both thin, forming a line contact method, thereby increasing the thermal resistance.

[0083] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0084] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A heat insulation system for a heating component of a circumferentially heated non-combustion smoking device, wherein the heating component comprises a heating tube and a heat insulation tube sleeved outside the heating tube, It is characterized in that The upper and lower ends of the heating component are respectively fixedly connected to the support member; The upper and lower ends of the heating pipe and the insulating pipe are respectively in point contact / line contact with the support member, a gap is provided between the heating pipe and the insulating pipe, and the heating pipe, the insulating pipe and the upper and lower supporting members are sealed to form a main closed air chamber; The support member is provided with a plurality of support ribs distributed transversely, the support ribs are sleeved in the insulation tube, and a gap is left between the outer edge of the support ribs and the inner wall of the insulation tube, so that a plurality of support closed air chambers are formed between the support member and the inner wall of the insulation tube, and the upper and lower ends of the insulation tube are protruding from the upper and lower ends of the heating tube, so that the upper and lower ends of the heating tube are connected to the end of the support member, and the support ribs are sleeved inside the insulation tube; The support member includes an upper support member and a lower support member, the upper end of the heating component is connected to the outer shell through the upper support member, and the lower end of the heating component is connected to the outer shell through the lower support member. A hollow flue is provided inside the upper support member, and a hollow air duct is provided inside the lower support member. The inner diameter of the flue is larger than the inner diameter of the air duct, so that the width of the support ribs of the upper support member is smaller than the width of the support ribs of the lower support member.

2. The heat insulation system of the heating component of the circumferential heating non-burning smoking device according to claim 1, It is characterized in that The outer side of the end of the heating tube is in point contact with a plurality of first supporting ribs on the inner wall of the supporting member; or the end of the heating tube is in line contact with the first supporting surface on the supporting member.

3. The heat insulation system of the heating component of the circumferential heating non-burning smoking device according to claim 1, It is characterized in that The end of the thermal insulation tube is in point contact with a plurality of second support ribs on the inner wall of the support member; or the end of the thermal insulation tube is in line contact with the second support surface on the support member.

4. The heat insulation system of the heating component of the circumferential heating non-burning smoking device according to claim 1, It is characterized in that A plurality of support columns are provided at the end or outer side of the support member / the heating pipe / the insulating pipe, and the support member / the heating pipe / the insulating pipe is in point contact with the external structural member through the support columns; The ends of the support member / the heating pipe / the insulating pipe are provided with protruding external ribs, and the support member / the heating pipe / the insulating pipe is in line contact with the external structural member through the external ribs.

5. The heat insulation system of the heating component of the circumferential heating non-burning smoking device according to claim 1, It is characterized in that The insulating pipe comprises an insulating inner wall and an insulating outer wall spaced apart from each other, wherein the length of the insulating inner wall is greater than the length of the insulating outer wall, so that the insulating pipe is connected to the support member through the insulating inner wall.

6. The heat insulation system of the heating component of the circumferentially heated non-burning smoking device according to claim 1, It is characterized in that The wall thickness of the heating tube is 0.1-0.2 mm; And / or, the wall thickness of the thermal insulation pipe is 0.1-0.2 mm; And / or, the axial wall thickness of the support member is 0.4-1.0 mm; And / or, the width of the gap between the outer edge of the supporting rib and the inner wall of the insulation pipe is 0.05-0.15 mm.

7. A circumferentially heated non-burning smoking device, comprising a housing, It is characterized in that The shell is provided with an insulation system of the circumferential heating non-burning smoking device heating component according to any one of claims 1 to 6.

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