阅读说明：本技术 加热不燃烧烟草制品的电磁感应式加热烟具 (Electromagnetic induction type heating smoking set for heating non-burning tobacco products ) 是由 吴超群 徐逸飞 雷艇 邓腾飞 严可汗 于 2021-08-27 设计创作，主要内容包括：公开了一种加热不燃烧烟草制品的电磁感应式加热烟具,包括：加热杯(2),其一侧开口用于容纳烟草制品(4),内具有插入烟草制品内进行加热的加热元件(1)；套筒(6),与加热杯同轴设置,且加热杯位于其内；感应线圈(5),布置在加热杯外壁上；电源(8),用于给感应线圈提供高频交变电流,使其产生方向不断改变的交变磁场,处于交变磁场中的加热元件壁面出现涡旋电流,涡旋电流的焦耳热效应使加热元件升温实现对烟草制品的加热。本发明采用无线传能加热方式,有效提升加热效率和缩短加热时间。(An electromagnetic induction heating smoking set for heating non-combustible tobacco products is disclosed, comprising: a heating cup (2) with one side opening for accommodating tobacco products (4) and a heating element (1) inserted into the tobacco products for heating; the sleeve (6) is coaxially arranged with the heating cup, and the heating cup is positioned in the sleeve; an induction coil (5) arranged on the outer wall of the heating cup; and the power supply (8) is used for providing high-frequency alternating current for the induction coil to generate an alternating magnetic field with the direction changing constantly, the wall surface of the heating element in the alternating magnetic field generates vortex current, and the joule heat effect of the vortex current enables the heating element to be heated to heat the tobacco products. The invention adopts a wireless energy transmission heating mode, thereby effectively improving the heating efficiency and shortening the heating time.)

1. An electromagnetic induction heating smoking set for heating a non-combustible tobacco product, comprising:

a heating cup, one side of which is opened for accommodating tobacco products and is internally provided with a heating element which is inserted into the tobacco products for heating;

the sleeve is coaxially arranged with the heating cup, and the heating cup is positioned in the sleeve;

an induction coil disposed on an outer wall of the heating cup;

the power supply is used for providing high-frequency alternating current for the induction coil to generate an alternating magnetic field with the direction changing constantly, eddy current appears on the wall surface of the heating element in the alternating magnetic field, and the joule heat effect of the eddy current enables the heating element to be heated to heat the tobacco products;

a shield layer disposed on an inner wall of the sleeve to prevent heat dissipation and electromagnetic leakage;

a parameter setting unit for setting an operating frequency of the induction coil or a heating temperature of the heating element; and

and a controller for adjusting the operating frequency of the induction coil or the heating temperature of the heating element to be within the range set by the parameter setting unit.

2. The inductively heated smoking article of claim 1, wherein the heating element is of a burred configuration.

3. An electromagnetic induction heating smoking article for heating a non-combustible smoking article according to claim 1 or 2, wherein said heating element is operated at a temperature in the range of 150 ℃ to 350 ℃.

4. An electromagnetic induction heating smoking article for heating a non-combustible smoking article according to claim 3, wherein said heating element is an iron-nickel alloy comprising, in mass percent: 30 to 40 percent of Ni, 55 to 65 percent of Fe, 0.1 to 0.8 percent of Mn, 0.01 to 0.1 percent of C, 0.01 to 0.05 percent of P, 0.01 to 0.05 percent of S and 0.1 to 0.5 percent of Si.

5. The electromagnetic induction heated smoking article of claim 1, wherein said controller generates different PWM or SPWM signals to adjust the operating frequency of said induction coil during different operating conditions and utilizes a temperature sensor and an internal clock to trigger said different operating conditions.

6. The electromagnetic induction heating smoking article for heating a non-combustible smoking article as claimed in claim 5, wherein said controller adjusts the frequency of the output PWM or SPWM signal to a desired operating frequency of said induction coil after said heating element reaches a stable temperature on a time scale to eliminate energy reflection and to mitigate heating during operation of said induction coil.

7. An electromagnetic induction heating smoking article for heating a non-combustible smoking article according to claim 1, wherein said shielding layer comprises a magnetic ferrite material.

8. The induction heating smoking article of claim 1, wherein said heating cup and said sleeve are attached to a hand piece, said hand piece being provided with a layer of insulation of porous material.

9. An electromagnetic induction heating smoking article for heating a non-combustible smoking article according to claim 1, wherein said heating cup is of a spindle configuration having a cross-sectional diameter which decreases in the direction of insertion of the smoking article.

10. The electromagnetic induction heating smoking article for heating non-combustible tobacco products of claim 1, further comprising a display screen capable of displaying one or more of the following information: usage time, cumulative usage time, operating frequency, heating temperature.

Technical Field

The invention relates to a heating device for heating non-combustible tobacco by adopting an electromagnetic induction heating mode.

Background

The safety of the tobacco product which is not combusted by heating is far higher than that of the traditional cigarette. Unlike the working principle of electronic cigarettes, the characteristic of heating non-burning tobacco products is to heat tobacco by using an external heat source instead of igniting tobacco, which is the most essential difference from the traditional tobacco. The smoking temperature of the cigarette which is not burnt is generally below 300 ℃, only distillation and simpler pyrolysis reaction occur, the generation of a plurality of potential harmful substances in the processes of high-temperature burning, pyrolysis and thermal synthesis can be effectively reduced, and the harm of the tobacco products to human bodies is reduced to a great extent. In terms of emissions, a tobacco product that does not burn when heated is 5% of a traditional cigarette. From a cytotoxicity perspective, heating a non-burning tobacco product is only 14% of a conventional cigarette.

The smoking set that traditional carbon heating type and fuel heating type heating do not burn tobacco hinders greatly, has the peculiar smell, produces waste gas, rate of heating is slow, has certain potential safety hazard, is unfavorable for subsequent branding of product and market promotion. In addition, the temperature control of the smoking set which heats the non-burning tobacco is generally realized by adopting the feedback control of a temperature sensor, and the control mode can lead the design of a circuit board to be complex and is not beneficial to the miniaturization of the smoking set.

Disclosure of Invention

The electromagnetic induction type heating smoking set for heating the non-burning tobacco products, provided by the invention, adopts a wireless energy transfer heating mode to replace the traditional carbon heating mode and the traditional fuel heating mode, and generates a high-frequency alternating magnetic field through the induction coil, so that the heating element generates movement relative to a cutting magnetic induction line, eddy current is induced on the surface of the heating element, a large amount of joule heat is released, the heating purpose is further realized, the heating efficiency can be effectively improved, the heating time is shortened, and the use experience of a user is integrally improved. In addition, the invention improves the magnetic induction characteristic of the heating element by changing the component proportion of the heating element, further realizes the control of temperature, simplifies the design of a circuit board and is beneficial to the miniaturization of smoking set.

According to an aspect of an embodiment of the present invention, there is provided an electromagnetic induction heating smoking article for heating a non-combustible smoking article, comprising:

a heating cup, one side of which is opened for accommodating tobacco products and is internally provided with a heating element which is inserted into the tobacco products for heating;

the sleeve is coaxially arranged with the heating cup, and the heating cup is positioned in the sleeve;

an induction coil disposed on an outer wall of the heating cup;

the power supply is used for providing high-frequency alternating current for the induction coil to generate an alternating magnetic field with the direction changing constantly, eddy current appears on the wall surface of the heating element in the alternating magnetic field, and the joule heat effect of the eddy current enables the heating element to be heated to heat the tobacco products;

a shield layer disposed on an inner wall of the sleeve to prevent heat dissipation and electromagnetic leakage;

a parameter setting unit for setting an operating frequency of the induction coil or a heating temperature of the heating element; and

and a controller for adjusting the operating frequency of the induction coil or the heating temperature of the heating element to be within the range set by the parameter setting unit.

In some examples, the heating element is of a burred type construction.

In some examples, the heating element operates at a temperature in the range of 150 ℃ to 350 ℃.

In some examples, the heating element is an iron-nickel alloy comprising, in mass percent: 30 to 40 percent of Ni, 55 to 65 percent of Fe, 0.1 to 0.8 percent of Mn, 0.01 to 0.1 percent of C, 0.01 to 0.05 percent of P, 0.01 to 0.05 percent of S and 0.1 to 0.5 percent of Si.

In some examples, the controller generates different PWM or SPWM signals to adjust the operating frequency of the induction coil in different operating states, and triggers the different operating states using a temperature sensor and an internal clock.

In some examples, the controller adjusts the frequency of the output PWM or SPWM signal after the heating element reaches a stable temperature on a time scale to achieve a desired operating frequency of the induction coil to eliminate energy reflection phenomena to mitigate heating phenomena during operation of the induction coil.

In some examples, the shielding layer is made of a magnetic ferrite material.

In some examples, the heating cup and the sleeve are attached to a hand piece that is provided with a layer of insulation of porous material.

In some examples, the heating cup is in a spindle configuration with a cross-sectional diameter that tapers in a direction of insertion of the smoking article.

In some examples, further comprising a display screen capable of displaying one or more of the following information: usage time, cumulative usage time, operating frequency, heating temperature.

The invention has the following beneficial effects: (1) the material property of the iron-nickel alloy with a specific proportion is used for controlling the heating temperature, so that the design of a control circuit is simplified, and the whole equipment is smaller. (2) The problem that the temperature of the coil is increased due to energy reflection after the temperature is stabilized is solved by means of frequency conversion control, and the user experience effect is improved. (3) The working temperature of the heating element can be changed when the temperature rise is stable by changing the material proportion of the heating element, and the heating element has the advantages of being suitable for tobacco products with different use temperatures. (4) The human-computer interaction interface is provided, so that the user can conveniently master the equipment information, and the use convenience is improved. (5) And an active frequency modulation function is provided, so that the use flexibility of the equipment is increased.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

Fig. 1 is a schematic view of an electromagnetic induction heating smoking set for heating a nonflammable tobacco product according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of an electromagnetic induction heating smoking set portion for heating a nonflammable tobacco product according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a heating element according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of an electromagnetic induction heating smoking set for heating a nonflammable tobacco product according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the frequency modulation function of an electromagnetic induction heating smoking set for heating non-combustible tobacco products according to an embodiment of the present invention.

Description of reference numerals:

1-heating element, 2-heating cup, 3-switch, 4-tobacco product, 5-induction coil, 6-sleeve, 7-PCB circuit board, 8-power supply, 9-heat insulation material, 10-shielding layer, 11-fixing piece, 12-display screen, 13-state inquiry part, 14-parameter setting part and 15-shell.

Detailed Description

Fig. 1, 2 show an electromagnetic induction heating smoking set for heating a non-combustible smoking article, said smoking set comprising a heating element 1, a heating cup 2, an induction coil 5, a sleeve 6, a PCB circuit board 7, a power supply 8, a shielding layer 10.

The heating cup 2 and the sleeve 6 are positioned at the same end of the smoking set, the heating cup 2 and the sleeve 6 are coaxially arranged, and the heating cup 2 is positioned in the sleeve 6. The heating cup 2 is used for accommodating the tobacco products and is integrally in a spindle-shaped structure with one side opened, and the section diameter of the heating cup is gradually reduced along the insertion direction of the tobacco products so as to limit the freedom degrees of the tobacco products in five directions after the tobacco products are completely inserted. The heating element 1 is arranged in the heating cup 2 by means of a fixing element 11. The heating element 1 and the fixing piece 11 can be detachably connected through threads, and replacement is convenient. The tobacco product is inserted on the heating element 1 when it is placed in the heating cup 2. As shown in fig. 3, the heating element 1 has a burred structure, which increases the contact area without affecting the insertion of the tobacco product, and improves the heating efficiency and uniformity. The heating cup 3 and the holder 5 may be made of polyetheretherketone.

The induction coil 5 is arranged on the outer wall of the heating cup 2. The shield layer 10 is arranged on the inner wall of the sleeve 6. The shield layer 10 serves to prevent heat dissipation and electromagnetic leakage. There is a thermally insulating air gap between the shield 10 and the induction coil 5. The shielding layer 10 may be made of a magnetic ferrite material, but is not limited thereto.

Referring to fig. 1 and 4, the heating cup 2 and the sleeve 6 are connected to the hand-held part to form a shell 15 of the smoking set, and the PCB 7 is packaged in the shell 15. The hand-held portion is provided with a switch 3, a display 12, a state inquiry portion 13, and a parameter setting portion 14. Aiming at the problem of heating of the smoking set, the hand-held part is provided with a porous heat-insulating material 9.

The status inquiry unit 13 may be a key or a virtual key on the display 12. The user obtains the smoking set using condition through the status inquiring part 13, including but not limited to: information such as current usage time, current accumulated usage time, operating frequency, heating temperature, battery level, etc. is displayed on the display 12.

The parameter setting unit 14 is used to set the operating frequency of the induction coil 5 or the heating temperature of the heating element 1. The controller of the PCB 7 adjusts the operating frequency of the induction coil 5 or the heating temperature of the heating element 1 to be within the range set by the parameter setting unit 14. As for the principle of the frequency modulation function, referring to fig. 5, after the user sets the heating frequency of the induction coil 5 through the parameter setting unit 14, the controller achieves the purpose of changing the heating frequency by changing the frequency of the output PWM wave.

The power supply 8 is used for providing the energy required when the smoking set is heated. The power passes through preceding stage voltage stabilizing circuit, high frequency inverter circuit, impedance matching circuit on the control circuit PCB board 7 and then inputs induction coil 5, produces high frequency alternating magnetic field, makes heating element 1 produce the motion of cutting magnetic induction line relatively, and its surface induction goes out the vortex, releases a large amount of joule heat, and then realizes the purpose of heating, can effectively promote heating efficiency and shorten heating time, and the use that wholly promotes the user is experienced.

The invention improves the magnetic induction characteristic of the heating element 1 by changing the component proportion thereof, further realizes the control of the temperature, simplifies the design of the circuit board and is beneficial to the miniaturization of smoking set. In a possible embodiment, the heating element 1 is an iron-nickel alloy comprising, in mass%: 30-40% of Ni, 55-65% of Fe, 0.1-0.8% of Mn, 0.01-0.1% of C, 0.01-0.05% of P, 0.01-0.05% of S and 0.1-0.5% of Si, and the magnetic induction characteristic of the heating element can be changed by adjusting the component proportion, so that the stable temperature of the heating element is controlled between 150 ℃ and 350 ℃.

The present invention maintains the frequency of the high frequency alternating magnetic field generated by the induction coil 5 in a certain interval through a frequency tracking control technology, and the frequency interval can be between 50KHz and 500KHz, but is not limited thereto.

According to the characteristics of tobacco when being heated, the invention adopts a control method of variable-frequency segmented control, and designs various working frequencies for the induction coil 5 in the working process aiming at different heating stages. The control program of the controller on the control circuit PCB board 7 comprises a module for generating various PWM or SPWM signals, and different working states such as a rapid temperature rise state, a transition state before frequency reduction and a stable state are triggered by using a temperature sensor and an internal clock, and the temperature rise is not uniform at high frequency, so that the temperature of the tobacco products is more uniform by adding the transition state.

After the heating element 1 reaches a stable temperature on a time scale, the controller adjusts the frequency of the output PWM wave or SPWM wave through a program, so that the frequency of a driving signal is changed, the frequency of the alternating current on the load is changed to an expected value, the frequency of the alternating magnetic field in the induction coil 5 is changed and adjusted, the energy reflection phenomenon is eliminated, and the heating phenomenon in the working process of the induction coil 5 is relieved.