WO2019109883A1

WO2019109883A1 - Sectioned heating device for heat-not-burn cigarette

Info

Publication number: WO2019109883A1
Application number: PCT/CN2018/118905
Authority: WO
Inventors: 郭洪礼
Original assignee: 深圳市余看智能科技有限公司
Priority date: 2017-12-05
Filing date: 2018-12-03
Publication date: 2019-06-13
Also published as: CN207678852U

Abstract

A sectioned heating device for a heat-not-burn cigarette, the device comprising a heater and a control circuit, wherein the heater comprises multiple heating units and a heat-conducting tube (1), and each heating unit comprises a ring-shaped electric heating element (2); the heating unit comprises a heating ring (401), and the electric heating element (2) is sheathed at the periphery of the heating ring (401); and multiple heating rings (401) are tightly sheathed outside the heat-conducting tube (1) and are separated and arranged along the axial direction of the heat-conducting tube (1). The heating ring (401) allows tobacco shreds to be evenly heated, and the tobacco shreds do not spontaneously ignite due to localized high temperature. The heat-conducting tube (1) is arranged between the heating ring (401) and the tobacco shreds. When the next section is heated, the tobacco shreds, the heating of which was stopped in the previous section, can obtain some heat energy conducted from the heat-conducting tube (1), so that the temperature of these tobacco shreds being too low does not lead to smoke generated by the thermal cracking of the heated section being excessively absorbed by the low-temperature heated tobacco shreds.

Description

Segment heating device for heating non-burning cigarette

Related application

This application claims priority to Chinese Utility Model Application No.: 201721666518.4, filed on Dec. 5, 2017, entitled "Sectional Heating Device for Heating Non-Combustible Cigarettes".

Technical field

The present application relates to an electronic smoking device, and more particularly to a segmented heating device for heating non-burning cigarettes.

Background technique

Tobacco smoke contains at least three chemicals: tar, nicotine, and carbon monoxide. Tar is a mixture of several substances that condense into a sticky carcinogen in the lungs. Nicotine has a boiling point of 247 ° C. Nicotine is an addictive drug that is absorbed by the lungs and acts primarily on the nervous system. Carbon monoxide is produced by incomplete combustion of cut tobacco, which can reduce the ability of red blood cells to transport oxygen to the whole body, which is extremely harmful to the human body.

In the smoking process, except for the outer part of the cigarette, it is basically burned under the condition of insufficient oxygen supply. The carcinogens such as tobacco tar are mostly produced at 500-900 °C, and the smoke tar and carbon monoxide generated during smoking are accompanied by smoke. Flow into the respiratory tract of smokers, causing harm to smokers.

The invention of the application No. CN201611067068.7 discloses an electronic smoking device comprising a power source, a controller and a heater, the heater being cylindrical, including a heating chamber into which the cigarette is inserted, the heater comprising at least one heating unit, and the heating unit comprising The electronic switch and the annular electric heating element; the electric heating element is connected to the power source through an electronic switch, and the control end of the electronic switch is connected to the control signal output end of the controller. The invention uses an electric heater to heat the tobacco of the cigarette, the smoker can only suck the nicotine generated by the heating of the tobacco, the electric heater does not produce an open flame, the heated tobacco does not produce the smoke tar and the carbon monoxide, and can reduce the smoking of the tobacco. The harm of the person.

The invention has the disadvantage that the tobacco of the cigarette is directly heated by the annular electric heating element, the tobacco is not heated uniformly, the tobacco has a local high temperature, and the local high temperature spontaneous combustion is easily caused when sucking; and the tobacco segment of the cigarette is heated, The tobacco section that stops heating may be too low in temperature, and the smoke generated by the thermal cracking of the heating section may be excessively absorbed by the low-temperature heated tobacco to reduce the generated smoke.

Summary of the invention

The technical problem to be solved by the utility model is to provide a partial heating of the non-burning cigarette which does not cause local high temperature of the tobacco, and does not cause excessive burning of the tobacco due to local high temperature, and the tobacco is not absorbed by the heated tobacco. Device.

In order to solve the above technical problem, the technical solution adopted by the utility model is a segment heating device for heating non-burning cigarettes, comprising a heater and a control circuit, the heater comprises a plurality of heating units and a heat pipe, and the heating unit comprises a ring shape. The heating element comprises a heating ring, and the heating element is sleeved on the outer circumference of the heating ring; the plurality of heating rings are tightly arranged outside the heat conducting tube and are arranged separately along the axial direction of the heat conducting tube.

In the segment heating device described above, the heating ring is a C-shaped elastic ring and includes an axial through groove.

In the segment heating device described above, the heater comprises a heating pipe, the heating pipe comprises a plurality of heating rings of the heating unit, and the heating ring comprises a C-shaped insulating groove, and the adjacent heating rings pass between The beam is partially connected.

In the segment heating device described above, the heat pipe is a stainless steel pipe, and the heating pipe is an aluminum alloy pipe.

In the segment heating device described above, the heating unit comprises an electronic switch and a temperature sensor, the control circuit comprises a microcontroller, the electric heating element is connected to the power source through the electronic switch, and the control end of the electronic switch is connected to the control signal output end of the controller; the temperature sensor is arranged On the outside of the heating element, the signal output of the temperature sensor is connected to the microcontroller.

In the above segment heating device, the temperature sensor is a thermistor, the first end of the thermistor is connected to the chip power supply through a current limiting resistor, the second end is grounded, and the first end of the thermistor is also used as a temperature sensor. The signal output is terminated to the microcontroller.

The segment heating device described above, the control circuit comprises an operating current sampling circuit, the working current sampling circuit comprises a sampling resistor, a filter resistor and a filter capacitor, the first end of the electric heating element is connected to the positive pole of the power source through the electronic switch, and the second end is passed through the sampling resistor Grounding, the current sampling end of the microcontroller is connected to the second end of the heating element through a filter resistor, and the filter capacitor is connected between the current sampling end of the microcontroller and the ground.

The heating ring of the utility model can make the shredded tobacco heat evenly, and the shredded tobacco does not spontaneously ignite due to local high temperature. The heat pipe is arranged between the heating ring and the shredded tobacco. When heating to the next section, the heated shredded tobacco in front can obtain a part of the heat conducted by the heat pipe, and the heat of the heating section is not caused by the temperature of the shredded tobacco being too low. The smoke is excessively absorbed by the low temperature heated tobacco.

DRAWINGS

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of a segmented heating apparatus for heating non-combustion cigarettes in accordance with an embodiment of the present invention.

2 is a rear elevational view of a segmented heating apparatus for heating non-burning cigarettes in accordance with an embodiment of the present invention.

Fig. 3 is a cross-sectional view taken along line A in Fig. 1;

Figure 4 is a front elevational view of the heating tube of the embodiment of the present invention.

Figure 5 is a rear elevational view of the heating tube of the embodiment of the present invention.

Figure 6 is a left side elevational view of the heating tube of the embodiment of the present invention.

Figure 7 is a cross-sectional view taken along line C in Figure 4 .

Figure 8 is a schematic diagram of a control circuit of an embodiment of the present invention.

Detailed ways

The structure and principle of the segment heating device for heating non-burning cigarettes according to the embodiment of the present invention are as shown in FIGS. 1 to 7, and include a heater and a control circuit.

The heater comprises a heat pipe of stainless steel 1, a heating pipe 4 of aluminum alloy and four heating units, and the heating unit comprises a ring-shaped electric heating element 2, an electronic switch and a thermistor 3.

The heating tube 4 of the aluminum alloy is tightly sheathed on the outside of the stainless steel heat pipe 1, and the heating pipe 4 has four heating rings 401 which are arranged apart along the axial direction of the heat pipe 1. There is a C-shaped heat insulating groove 402 between the heating rings 401, and the adjacent heating rings 401 are partially connected by the cross beam 403.

The heating ring 401 is a C-shaped elastic ring having an axial through groove 404 to increase the elasticity of the C-ring.

The heating ring 401 is a part of the heating unit, the electric heating element 2 is sleeved on the outer circumference of the heating ring 401, and the temperature sensor of the thermistor 3 as a heating unit is disposed outside the electric heating element 2. The first end of the thermistor NTC is connected to the chip power supply Vcc through a current limiting resistor, and the second end is grounded. The first end of the thermistor is also connected to the microcontroller as a signal output end of the temperature sensor.

The control circuit comprises a microcontroller and an operating current sampling circuit. The heating element of each heating unit is connected to the power source through an electronic switch, and the control end of the electronic switch is connected to the control signal output end of the controller.

Each of the heating units operates in sequence along the axial direction of the heat pipe 1. When the heating unit is working, the microcontroller opens the electronic switch of the heating unit to heat the electric heating element 2, and the heat generated by the electric heating element 2 is transmitted to the stainless steel heat pipe 1 through the heating ring 401, and then the stainless steel heat pipe 1 does not heat. The tobacco burning the cigarette is heated. When the temperature of the thermistor of the heating unit reaches the set temperature, the voltage output by the temperature sensor changes, the microcontroller turns off the electronic switch of the heating unit, and the heating unit stops heating. At the same time, the microprocessor opens the electronic switch of the next heating unit in the axial direction, and the next heating unit starts to work until all the heating units have completely heated the tobacco that heats the non-burning cigarette.

The working current sampling circuit comprises a sampling resistor R10, a filter resistor 11 and a filter capacitor C7. The first end of the electric heating element is connected to the positive pole of the power supply through the electronic switch, the second end is grounded through the sampling resistor R10, and the current sampling end of the microcontroller passes through the filter resistor 11 The second end of the heating element is connected, and the filter capacitor C7 is connected between the current sampling end of the microcontroller and the ground; the microprocessor controls the on/off of the electronic switch according to the sampling value of the working current to prevent the circuit from being overloaded.

The aluminum alloy heating ring of the above embodiment can make the shredded tobacco heat evenly, and the shredded tobacco does not spontaneously ignite due to local high temperature. The stainless steel tube is arranged between the aluminum alloy tube and the shredded tobacco. When heating to the next stage, the shredded tobacco that stops heating in front can obtain a part of the heat conducted by the stainless steel heat-conducting tube, and the temperature of the shredded tobacco is not too low, resulting in thermal cracking of the heating section. The generated smoke is excessively absorbed by the low temperature heated tobacco.

While the principles of the present invention have been described in detail, the preferred embodiments of the present invention The details of the embodiments are not intended to limit the scope of the invention, and any obvious changes, such as equivalent transformations, simple substitutions, etc., based on the technical solutions of the present invention, fall within the scope of the present invention. Within the scope of protection.

Claims

A segment heating device for heating non-burning cigarettes, comprising a heater and a control circuit, the heater comprising a plurality of heating units, the heating unit comprising an annular electric heating element; wherein the heater comprises a heat pipe and the heating unit comprises a heating ring The electric heating element is sleeved on the outer circumference of the heating ring; a plurality of heating rings are tightly sleeved on the outer side of the heat conducting tube and are arranged separately along the axial direction of the heat conducting tube.
The segmented heating apparatus of claim 1 wherein the heating ring is a C-shaped elastic ring comprising an axial passage.
The segment heating device according to claim 2, wherein the heater comprises a heating pipe, the heating pipe comprises a plurality of heating rings of the heating unit, and the heating ring comprises a C-shaped insulating groove, the phase The adjacent heating rings are partially connected by a lintel.
The segment heating device according to claim 2, wherein the heat pipe is a stainless steel pipe, and the heating pipe is an aluminum alloy pipe.
The segment heating device according to claim 1, wherein the heating unit comprises an electronic switch and a temperature sensor, the control circuit comprises a microcontroller, the electric heating element is connected to the power source through the electronic switch, and the control terminal of the electronic switch is controlled by the controller. The signal output end; the temperature sensor is arranged outside the electric heating element, and the signal output end of the temperature sensor is connected to the microcontroller.
The segment heating device according to claim 5, wherein the temperature sensor is a thermistor, the first end of the thermistor is connected to the chip power supply through a current limiting resistor, the second end is grounded, and the thermistor is The first end is also connected to the microcontroller as a signal output of the temperature sensor.
The segment heating device according to claim 5, wherein the control circuit comprises an operating current sampling circuit, the working current sampling circuit comprises a sampling resistor, a filter resistor and a filter capacitor, and the first end of the electric heating element is connected to the positive electrode through the electronic switch. The second end is grounded through the sampling resistor, and the current sampling end of the microcontroller is connected to the second end of the electric heating element through a filter resistor, and the filter capacitor is connected between the current sampling end of the microcontroller and the ground.