Cigarette heater and electric heating smoking apparatus

Patent metadata

Field	Value
Publication number	US-12102128-B2
Application number	US-202017425886-A
Country	US
Kind code	B2
Filing date	Jan 19, 2020
Priority date	Jan 26, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A cigarette heater, comprising a heating assembly and a heat insulation assembly used for insulating the heating assembly; the heating assembly comprises a longitudinal heating cavity used for accommodating a cigarette and a heating body used for heating the cigarette; the heat insulation assembly comprises an anisotropic material layer sleeved outside the heating assembly, the thermal conductivity coefficient of the anisotropic material layer in the radial direction being lower than the thermal conductivity coefficient thereof in the axial direction, being used for reducing the thermal conduction of the heat in the heating cavity along the radial direction toward the periphery. By means of arranging the anisotropic material layer outside the heating assembly, the present cigarette heater isolates the heat transfer in the radial direction and also converts the direction of conduction to a dispersed transfer toward the axial direction, reducing the radially outward heat transfer.

First claim

What is claimed is:

1. A cigarette heater comprising a heating assembly and a heat insulation assembly configured for insulating the heating assembly, the heating assembly comprising an elongated heating cavity configured for accommodating a cigarette and a heating body configured for heating the cigarette;
wherein the heat insulation assembly comprises an anisotropic material layer sleeved outside the heating assembly, the anisotropic material layer having a lower thermal conductivity coefficient in the radial direction than in the axial direction, and the anisotropic material layer configured for reducing conduction of heat from inside the heating cavity towards periphery of the heating cavity along the radial direction; wherein a first air medium layer is formed between the heat insulation assembly and the heating body.

2. The cigarette heater according to claim 1 , wherein the thermal conductivity coefficient of the anisotropic material layer in the axial direction is 30 times or more than that in the radial direction.

3. The cigarette heater according to claim 2 , wherein the thermal conductivity coefficient of the anisotropic material layer in the axial direction is 30-100 times of that in the radial direction.

4. The electric heating smoking apparatus, comprising a cigarette heater, and a power device configured for supplying power to the cigarette heater, wherein the cigarette heater is according to claim 3 .

5. The electric heating smoking apparatus, comprising a cigarette heater, and a power device configured for supplying power to the cigarette heater, wherein the cigarette heater is according to claim 2 .

6. The cigarette heater according to claim 2 , wherein the heat insulation assembly further comprises an insulation tube disposed between the heating assembly and the anisotropic material layer; the insulation tube comprises an inner tube body and an outer tube body opposite each other along the radial direction, wherein a spacing is defined between the inner tube body and the outer tube body to form a first insulation cavity; the first insulation cavity is filled with a first powder insulation material; the anisotropic material layer is disposed on the outer surface of the outer tube body in an overlapping manner along the radial direction; wherein the first air medium layer is formed between the inner tube body and the heating body.

7. The cigarette heater according to claim 2 , wherein the cigarette heater further comprises a hollow outer shell with an open end, an end cover base covering on the open end of the outer shell; the outer shell and the end cover base are matched to form an accommodating space, in which the heating assembly and the heat insulation assembly are disposed.

8. The cigarette heater according to claim 1 , wherein the heat insulation assembly further comprises an insulation tube disposed between the heating assembly and the anisotropic material layer; the insulation tube comprises an inner tube body and an outer tube body opposite each other along the radial direction, wherein a spacing is defined between the inner tube body and the outer tube body to form a first insulation cavity; the first insulation cavity is filled with a first powder insulation material; the anisotropic material layer is disposed on the outer surface of the outer tube body in an overlapping manner along the radial direction; wherein the first air medium layer is formed between the inner tube body and the heating body.

9. The cigarette heater according to claim 8 , wherein the first powder insulation material comprises at least one of aerogel powder, diatomite powder and zirconia powder.

10. The cigarette heater according to claim 9 , wherein the first powder insulation material has a particle diameter of 500-1000 μm.

11. The cigarette heater according to claim 8 , wherein the insulation tube further comprises a second insulation cavity defined outside the anisotropic material layer in an overlapping manner along the radial direction; the second insulation cavity is filled with a second powder insulation material.

12. The cigarette heater according to claim 11 , wherein the first powder insulation material has a greater particle diameter than that of the second powder insulation material; the second powder insulation material has a particle diameter of 1 to 500-1000 μm.

13. The cigarette heater according to claim 8 , wherein the heat insulation assembly further comprises an outer heat shield disposed outside the anisotropic material layer; the outer heat shield is configured for reducing the conduction of the heat from inside the heating cavity towards the periphery of the heating cavity along the radial direction.

14. The cigarette heater according to claim 13 , wherein the outer heat shield has a heat radiation rate lower than 0.3.

15. The cigarette heater according to claim 13 , wherein a spacing is defined between the insulation tube and the heating assembly along the radial direction to form a first air medium layer; and/or
a spacing is defined between the anisotropic material layer and the outer heat shield along the radial direction to form a second air medium layer.

16. The cigarette heater according to claim 13 , wherein the heating assembly comprises a bracket, an electromagnetic coil wound on the bracket, and an induction heating element electromagnetically coupled with the electromagnetic coil, the bracket defining an elongated heating cavity therein, which is configured for accommodating a cigarette.

17. The electric heating smoking apparatus, comprising a cigarette heater, and a power device configured for supplying power to the cigarette heater, wherein the cigarette heater is according to claim 8 .

18. The cigarette heater according to claim 1 , wherein the cigarette heater further comprises a hollow outer shell with an open end, an end cover base covering on the open end of the outer shell;
the outer shell and the end cover base are matched to form an accommodating space, in which the heating assembly and the heat insulation assembly are disposed.

19. An electric heating smoking apparatus, comprising a cigarette heater, and a power device configured for supplying power to the cigarette heater,
wherein the cigarette heater comprising a heating assembly and a heat insulation assembly configured for insulating the heating assembly, the heating assembly comprising an elongated heating cavity configured for accommodating a cigarette and a heating body configured for heating the cigarette; wherein the heat insulation assembly comprises an anisotropic material layer sleeved outside the heating assembly, the anisotropic material layer having a lower thermal conductivity coefficient in the radial direction than in the axial direction, and the anisotropic material layer configured for reducing conduction of heat from inside the heating cavity towards periphery of the heating cavity along the radial direction; wherein a first air medium layer is formed between the heat insulation assembly and the heating body.

Assignees

• Shenzhen First Union Tech Co

Inventors

• Zhang Yunkai
• Lei baoling
• Tang Shuhui
• Hu Ruilong
• Xu Zhongli
• Li Yonghai

Classifications

• A24F40/42

  Cartridges or containers for inhalable precursors · CPC title

• A24F40/20

  Devices using solid inhalable precursors · CPC title

• H05B1/0202

  Switches · CPC title

• H05B6/36

  Coil arrangements · CPC title

• A24D1/20

  Cigarettes specially adapted for simulated smoking devices · CPC title