WO2016172921A1

WO2016172921A1 - Electronic cigarette and temperature control method for heating element thereof

Info

Publication number: WO2016172921A1
Application number: PCT/CN2015/077968
Authority: WO
Inventors: 向智勇
Original assignee: 惠州市吉瑞科技有限公司深圳分公司; 惠州市吉瑞科技有限公司
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-11-03
Also published as: CN106572703A; CN106572703B; WO2016172921A8

Abstract

An electronic cigarette and a temperature control method for a heating element thereof. The electronic cigarette comprises: a heating element (1) used to vaporize a liquid and having a resistance value that increases as temperature increases; a power supply circuit (2) used to supply power to the heating element (1); and a voltage adjustment circuit (3) used to detect the resistance value of the heating element (1), to acquire current temperature of the heating element (1). The voltage adjustment circuit (3) is further used to: when the current temperature is greater than a first preset value or is less than a second preset value, adjust a power supply voltage of the heating element (1), to keep heating temperature of the heating element (1) within a preset temperature range. A technical effect that when the heating element (1) is being heated, a heating resistance of the heating element (1) is detected to monitor and control temperature of the heating element (1), to keep the temperature of the heating element (1) within a suitable temperature range is implemented.

Description

Electronic cigarette and heating element temperature control method thereof

Technical field

The invention relates to the field of electronic cigarette technology, in particular to an electronic cigarette and a heating element temperature control method thereof.

Background technique

Electronic cigarettes are a relatively common type of artificial cigarette electronic products, mainly used to quit smoking and replace cigarettes. The atomizing heating wire is a heating device for atomizing the smoke oil in the electronic cigarette. When the electronic cigarette works, the battery supplies power to the atomizing heating wire, the heating wire is energized and heated, and when the temperature rises to the atomizing temperature of the smoke oil, The atomized smoke oil forms a simulated smoke, so that the user has a feeling of sucking the smoke when smoking the electronic cigarette.

At present, the heating wire used for atomizing the smoke oil in the electronic cigarette mostly uses a heat-generating alloy, such as a nickel-chromium alloy, an iron-chromium-aluminum alloy, etc., and the heat-generating alloy has good heat resistance and a long service life. However, regardless of the material used for the heating wire, the temperature rises within a certain range during continuous energization. If the temperature of the heating wire is higher than the temperature at which the oil is atomized, the oil will crack and produce The burnt taste affects the taste of smoking. Especially when the remaining amount of electronic cigarette smoke is small, the temperature on the heating wire will rise sharply, which will eventually lead to the adverse consequences of burning the electronic cigarette. Therefore, in the process of working the electronic cigarette, it is necessary to detect the temperature of the heating wire and control the heating temperature.

Moreover, since the temperature coefficient of resistance of the heat-generating alloy material used in the existing electronic cigarette is relatively low, taking the nickel-chromium alloy and the iron-chromium-aluminum alloy as an example, the temperature coefficient of resistance of the nickel-chromium alloy is 1.3×10 ^-6 /° C., iron chromium The temperature coefficient of resistance of aluminum alloy is 0.8×10 ^-6 /°C. When the electronic cigarette works normally, although the heating resistance of the atomizing heating wire will increase with the increase of temperature, the change is not obvious, so the heat is detected. The heating resistance of the wire is known to change the temperature of the heating wire, and further, the temperature control of the heating wire is not feasible when the temperature is high. Further, in the prior art, the temperature sensor is directly detected in the electronic cigarette, and the temperature change of the heating wire is directly detected by the temperature sensor, and is output to the microprocessor, so that the microprocessor determines the current temperature of the heating wire. Is it too high, and when its temperature is too high, control the supply voltage of the heating wire to maintain the temperature of the heating wire within a suitable temperature range. However, this solution requires the addition of a temperature sensor in the electronic cigarette, which increases the volume and design complexity of the internal circuit of the electronic cigarette.

That is to say, in the prior art, the electronic cigarette cannot detect the heat generated by the atomizing heating wire to know the heat. The temperature change of the wire, in order to control the temperature of the heating wire when the temperature is too high, there is also a temperature sensor in the electronic cigarette to detect the temperature change of the heating wire to control the temperature of the heating wire, so that the internal circuit of the electronic cigarette Technical problems with increased volume and design complexity.

technical problem

The present invention is directed to the prior art, the electronic cigarette cannot detect the temperature change of the heating wire by detecting the resistance of the heating wire, to control the temperature of the heating wire when the temperature is too high, and to detect by setting a temperature sensor in the electronic cigarette. The temperature change of the heating wire to control the temperature of the heating wire, so as to increase the volume and design complexity of the internal circuit of the electronic cigarette, provides an electronic cigarette and a heating element temperature control method thereof, and realizes the heating element in the atomizer By detecting the heating resistance of the heating element during heating, the temperature is monitored and controlled, so that the temperature is not too high, and there is no need to add a temperature sensor in the electronic cigarette, and the volume and design complexity of the internal circuit of the electronic cigarette are not increased. Technical effect of degree.

Problem solution

Technical solution

In one aspect, the present invention provides an electronic cigarette including a heat generating component, a power supply circuit, and a voltage adjusting circuit;

The heat generating component is used for atomizing the smoke oil, and the resistance value of the heat generating component becomes larger as the temperature increases;

The power supply circuit is configured to supply power to the heat generating component;

The voltage adjustment circuit is configured to detect a resistance value of the heat generating component to obtain a current temperature of the heat generating component, and adjust the current temperature when the current temperature is greater than a first preset value or less than a second preset value a supply voltage of the heat generating component to maintain a heating temperature of the heat generating component within a preset temperature range;

Wherein, the material of the heat generating component is in weight percentage, and includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 8.5% ~15% nickel, and iron.

Optionally, when the temperature is between 0 ° C and 350 ° C, the temperature coefficient of resistance of the heat generating member is 0.3×10 ⁻³ /° C. to 3×10 ⁻³ /° C.

Optionally, the heat generating component further comprises: 2% to 3.5% of molybdenum by weight percentage.

Optionally, the heat generating component specifically includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015%~ 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 8.5% to 15% nickel, and iron which makes the heat-generating member as a whole 100% by weight.

Optionally, the heat generating component specifically includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 10.5% ～14.5% of nickel, and iron which makes the weight percentage of the heat generating member as a whole 100%.

Optionally, the heat generating component specifically includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 10.5% ～13.5% of nickel, 2% to 2.5% of molybdenum, and iron which gives the entire heat-generating member a weight percentage of 100%.

Optionally, the heat generating component specifically includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 12.5% ～14.5% nickel, 2% to 2.5% of molybdenum, and iron which gives the entire heat-generating member a weight percentage of 100%.

Optionally, the heat generating component is in the form of a filament or a sheet.

Optionally, the heat generating component is specifically wire-shaped and has a diameter of 0.08 mm to 0.4 mm.

Optionally, the voltage adjustment circuit includes:

a voltage current sampling sub-circuit for detecting a current supply voltage and a current supply current of the heat generating component;

a microprocessor connected to the voltage current sampling sub-circuit, configured to acquire a resistance value of the heat generating component based on the current power supply voltage and a current power supply current, and obtain a current temperature of the heat generating component based on the resistance value, And issuing a control signal when the current temperature is greater than the first preset value or less than the second preset value;

And a driving sub-circuit connected to the microprocessor, configured to adjust a power supply voltage of the heat generating component based on the control signal, so that a heat generation temperature of the heat generating component is maintained within the preset temperature range.

Optionally, the driving sub-circuit is specifically configured to generate a first driving signal and a second driving signal based on the control signal; the voltage adjusting circuit further includes:

An oscillating switch sub-circuit and a synchronous commutating sub-circuit connected to the driving sub-circuit, the oscillating switching sub-circuit receiving and starting or stopping operation based on the first driving signal, the synchronous commutating sub-circuit Receiving and starting or stopping the operation based on the second driving signal;

The microprocessor is further configured to determine, after acquiring the current temperature of the heat generating component, whether a current temperature of the heat generating component is greater than the first preset value or less than the second preset value, and The control signal is sent when the current temperature is greater than the first preset value or less than the second preset value; the driving sub-circuit is configured to start the oscillation switch sub-circuit starting operation based on the first driving signal Causing the oscillating switch sub-circuit to charge and store energy, while the driving sub-circuit is configured to stop the synchronous commutator circuit from operating based on the second driving signal; the driving sub-circuit is further configured to be in the oscillating After the switch sub-circuit is charged and stored, the oscillation switch sub-circuit is driven to stop according to the first driving signal, so that the oscillation switch sub-circuit is discharged to the synchronous commutator circuit, and the driving sub-circuit is further Driving the synchronous commutator circuit to start operation based on the second driving signal, so that the synchronous commutator circuit synchronously rectifies the discharge current of the oscillation switch sub-circuit Based on the voltage and the synchronous rectifier to supply the heat generating member.

Optionally, the current supply voltage of the heat generating component is specifically: the driving sub circuit drives the oscillation switch subcircuit and the ground based on a pulse width modulation signal of a first duty ratio output by the microprocessor The voltage obtained by the synchronous commutator circuit;

The control signal is specifically a pulse width modulation signal of a second duty ratio output by the microprocessor, wherein the first duty ratio is different from the second duty ratio.

In another aspect, the present invention also provides a method for controlling temperature of an electronic cigarette heating element, comprising the steps of:

S1. During a process of energizing the heat generating component of the electronic cigarette for atomizing the smoke oil, detecting a resistance value of the heat generating component to obtain a current temperature of the heat generating component;

S2. Adjusting a power supply voltage of the heat generating component when the current temperature is greater than a first preset value or less than a second preset value, so that a heat generation temperature of the heat generating component is maintained within a preset temperature range.

Optionally, the step S1 is specifically:

In a process of energizing the heat generating component of the electronic cigarette for atomizing the smoke oil, detecting a current power supply voltage and a current power supply current of the heat generating component, and acquiring the heat based on the current power supply voltage and the current power supply current The resistance value of the piece, and the current temperature of the heat generating member is obtained based on the resistance value.

Advantageous effects of the invention

Beneficial effect

One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

Since the material for the heat generating member for atomizing the tobacco oil used in the electronic cigarette of the present invention includes, by weight, 0.02% to 0.08% of carbon, 0.05% to 1% of silicon, and 1% to 2%. Manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 8.5% to 15% nickel, and iron; the electronic cigarette further includes a power supply circuit for The heating element is powered when the user smokes to detect, so that the heat generating member is heated, and in the process, the resistance value of the heat generating member becomes larger as the temperature increases; further, the electronic cigarette is further a voltage adjustment circuit for detecting a resistance value of the heat generating component to obtain a current temperature of the heat generating component, and adjusting the current temperature when the current temperature is greater than a first preset value or less than a second preset value The power supply voltage of the heat generating component is such that the heat generation temperature of the heat generating component is maintained within a preset temperature range; effectively solving the prior art that the electronic cigarette cannot pass the resistance of the heating wire to know the temperature change of the heating wire, Control the heating wire temperature when the temperature is too high And a technical problem of detecting the temperature change of the heating wire by setting a temperature sensor in the electronic cigarette to control the temperature of the heating wire, so that the volume and design complexity of the internal circuit of the electronic cigarette are increased, and the heat generating element in the atomizer is realized ( For example, if the heating wire is heated, the heating resistance of the heating element is detected to monitor and control its temperature, so that the temperature is not too high, and there is no need to add a temperature sensor in the electronic cigarette, and the internal circuit of the electronic cigarette is not increased. Technical effects of volume and design complexity.

Brief description of the drawing

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a block diagram showing the circuit structure of a first type of electronic cigarette according to an embodiment of the present invention;

2a is a schematic structural view of a wire-shaped heat generating component according to an embodiment of the present invention;

2b is a schematic structural view of a wire-shaped heat generating component and a smoke oil adsorbing member according to an embodiment of the present invention;

3 is a block diagram showing a circuit structure of a second electronic cigarette according to an embodiment of the present invention;

4 is a schematic diagram of a microprocessor and a peripheral circuit thereof of a voltage adjustment circuit according to an embodiment of the present invention;

5 is a partial circuit schematic diagram of a voltage adjustment circuit according to an embodiment of the present invention;

6 is a schematic diagram of a battery protection circuit of an electronic cigarette according to an embodiment of the present invention;

FIG. 7 is a flowchart of a method for controlling temperature of an electronic cigarette heating element according to an embodiment of the present invention.

Invention embodiment

Embodiments of the invention

The embodiment of the present invention provides an electronic cigarette for solving the problem that the electronic cigarette cannot detect the temperature change of the heat generating component by detecting the resistance of the heat generating component in the prior art, so as to control the temperature of the heat generating component when the temperature is too high, and A temperature sensor is arranged in the smoke to detect the temperature change of the heat generating component, so as to control the temperature of the heat generating component, so that the volume of the internal circuit of the electronic cigarette and the design complexity increase, and the heating element is detected when the heat generating component of the atomizer is heated. The heating resistor is used to monitor and control its temperature, so that its temperature is not too high, and there is no need to add a temperature sensor to the electronic cigarette, and the technical effect of the volume and design complexity of the internal circuit of the electronic cigarette is not increased.

The technical solution of the embodiment of the present invention is to solve the above technical problem, and the general idea is as follows:

An embodiment of the present invention provides an electronic cigarette including a heat generating component, a power supply circuit, and a voltage adjusting circuit; the heat generating component is used for atomizing the smoke oil, and the resistance value of the heat generating component becomes larger as the temperature increases; The power supply circuit is configured to supply power to the heat generating component; the voltage adjusting circuit is configured to detect a resistance value of the heat generating component to obtain a current temperature of the heat generating component, and the current temperature is greater than the first preset When the value is less than the second preset value, adjusting the power supply voltage of the heat generating component to maintain the heat generation temperature of the heat generating component within a preset temperature range; wherein the heat generating component is made of a weight percentage, including : 0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 8.5 % to 15% nickel, and iron.

It can be seen that, in the embodiment of the present invention, a heat-generating component of a specific material is used (the constituent materials thereof include, by weight percentage, 0.02% to 0.08% carbon, 0.05% to 1% silicon, and 1% to 2% manganese). , 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 8.5% to 15% nickel, and iron), the temperature coefficient of resistance is large, so that the heating element is energized and heated In the process, the heating resistance changes significantly with the change of temperature, and the temperature change of the heating element can be obtained by obtaining the heating resistance of the heating element through the voltage adjusting circuit, and the temperature of the heating element is controlled based on the temperature change. Appropriate temperature range; effectively solve the problem that the electronic cigarette in the prior art cannot pass the detection of the resistance of the heating wire Knowing the temperature change of the heating wire to control the temperature of the heating wire when its temperature is too high, and detecting the temperature change of the heating wire by setting a temperature sensor in the electronic cigarette to control the temperature of the heating wire, so that the volume of the internal circuit of the electronic cigarette is The technical problem of increasing design complexity is achieved by detecting the heating resistance of the heating element when the atomizing device heating element (such as heating wire) is heated, so as to monitor and control its temperature, so that the temperature is not too high, and it is not necessary Adding a temperature sensor to the electronic cigarette does not increase the technical effect of the volume and design complexity of the internal circuit of the electronic cigarette.

For a better understanding of the above technical solutions, the above technical solutions will be described in detail in conjunction with the drawings and specific embodiments. It should be understood that the specific features of the embodiments and embodiments of the present invention are detailed to the technical solutions of the present application. The description, rather than the limitation of the technical solution of the present application, can be combined with each other in the embodiments of the present invention and the technical features in the embodiments without conflict.

Embodiment 1

Referring to FIG. 1, an embodiment of the present invention provides an electronic cigarette, including a heat generating component 1, a power supply circuit 2, and a voltage adjusting circuit 3;

The heat generating component 1 is used for atomizing the smoke oil, and the resistance value of the heat generating component 1 becomes larger as the temperature increases;

The power supply circuit 2 is used to supply power to the heat generating component 1;

The voltage adjustment circuit 3 is configured to detect the resistance value of the heat generating component 1 to obtain the current temperature of the heat generating component 1, and adjust the power supply of the heat generating component 1 when the current temperature is greater than the first preset value or less than the second preset value. The voltage is such that the heat generation temperature of the heat generating component 1 is maintained within a preset temperature range; for example, the optimum temperature of the smoke oil atomization is 200 ° C to 270 ° C, when the current temperature of the heat generating component 1 is greater than 270 ° C or less than 200 ° C The voltage adjusting circuit 3 adjusts the power supply voltage of the heat generating element 1 so that the heat generation temperature of the heat generating element 1 is maintained within a temperature range of 200 ° C to 270 ° C.

Specifically, the heat generating element 1 is usually an alloy material, and it must have certain heat resistance, plasticity, weldability, toughness, and the like due to the specific use of the heat generating element 1 in the electronic cigarette. Nickel is an excellent corrosion-resistant material and an important alloying element. Nickel can form austenite elements in the heating alloy. Chromium acts as an alloying element in the heating alloy, which promotes the contradictory movement inside it to favor corrosion corrosion. , chromium increases the electrode potential of the iron-based solid solution, chromium absorbs iron electrons to passivate iron, and nickel plays a role in the heat-generating alloy after being combined with chromium; carbon is an element that stabilizes austenite, and The degree of action is very large (about 30 times that of nickel), and the affinity of carbon and chromium is very large, forming a series of complicated carbonization with chromium. The material can effectively improve the strength and corrosion resistance of the heating alloy; silicon can significantly improve the elastic limit, yield point and tensile strength of the heating alloy, and combine silicon and molybdenum and chromium to improve the corrosion resistance and oxidation resistance of the heating alloy. The role of the heating alloy can also improve the heat resistance; in addition, phosphorus and sulfur are essential harmful impurities in some alloys, such as phosphorus will cause the alloy to appear "cold brittleness", sulfur will cause the alloy to appear "hot brittleness" "Because the reduction of the content of both will increase the cost of the process, usually not completely eliminated in the specific implementation process, can only reduce the content as low as possible within a certain range, or by adding other elements to alleviate the two The negative effects of manganese; manganese can weaken and eliminate the adverse effects of sulfur. The effect of manganese on austenite is similar to that of nickel, but the effect of manganese is not on the formation of austenite, but on the reduction of the critical quenching rate of the heat-generating alloy. It increases the stability of austenite, inhibits the decomposition of austenite, maintains the austenite formed at high temperature to normal temperature and improves the hardenability of the alloy. Gold has good wear resistance and other physical properties; Iron is an essential element of many alloys. The elements constituting the above alloys each have their roles and uses (or drawbacks). In order for the heat-generating alloy to finally achieve a specific application performance, the content of each element must satisfy a certain ratio. In the present embodiment, the material of the heat-generating member 1 In weight percent, including: 0.02% to 0.08% carbon (C), 0.05% to 1% silicon (Si), 1% to 2% manganese (Mn), 0.015% to 0.045% phosphorus (P) , 0.01% to 0.03% of sulfur (S), 16.5% to 20% of chromium (Cr), 8.5% to 15% of nickel (Ni), and iron (Fe).

In the specific implementation process, the components of the heat generating component 1 have the following conditions:

1) The heat generating component 1 specifically includes: 0.02% to 0.08% of carbon, 0.05% to 1% of silicon, 1% to 2% of manganese, 0.015% to 0.045% of phosphorus, 0.01% to 0.03% of sulfur, and 16.5%. ～18.1% of chromium, 8.5% to 15% of nickel, and iron which gives the entire heat-generating member 1 a weight percentage of 100%. Such as 0.03% carbon, 0.08% silicon, 2% manganese, 0.045% phosphorus, 0.03% sulfur, 17% chromium, 14% nickel.

2) The heat generating component 1 specifically includes: 0.02% to 0.08% of carbon, 0.05% to 1% of silicon, 1% to 2% of manganese, 0.015% to 0.045% of phosphorus, 0.01% to 0.03% of sulfur, and 16.5%. ～20% of chromium, 10.5% to 14.5% of nickel, and iron which gives the entire heat-generating member 1 a weight percentage of 100%. Such as 0.08% carbon, 1% silicon, 2% manganese, 0.045% phosphorus, 0.03% sulfur, 19% chromium, 14% nickel.

3) In addition to the above materials, the heat generating component 1 further includes other materials, such as 2% to 3.5% of molybdenum (Mo), which can significantly improve the hardenability and heat strength of the alloy, prevent temper brittleness, and increase the remaining Magnetic and coercive, at this time the content of iron (Fe) can make the weight ratio of the composition as a whole 100%. Specifically, the heat generating component 1 includes: 0.02% to 0.08% of carbon, 0.05% to 1% of silicon, 1% to 2% of manganese, 0.015% to 0.045% of phosphorus, 0.01% to 0.03% of sulfur, and 16.5%. ~ 18.1% chromium, 10.5% to 13.5% nickel, 2% to 2.5% molybdenum, and iron to 100% by weight of the heat generating component 1; such as 0.08% carbon, 1% silicon, 2% Manganese, 0.045% phosphorus, 0.03% sulfur, 17% chromium, 12% nickel and 2.5% molybdenum. Alternatively, the heat generating component 1 specifically includes: 0.02% to 0.08% of carbon, 0.05% to 1% of silicon, 1% to 2% of manganese, 0.015% to 0.045% of phosphorus, 0.01% to 0.03% of sulfur, and 16.5%. ~ 18.1% chromium, 12.5% to 14.5% nickel, 2% to 2.5% molybdenum, and iron to 100% by weight of the heat generating component 1; such as 0.03% carbon, 1% silicon, 2% Manganese, 0.045% phosphorus, 0.03% sulfur, 17% chromium, 14% nickel and 2.5% molybdenum. In both ratios, the temperature coefficient of resistance of the heat generating member 1 is about 1.1 × 10 ^-3 / ° C.

In summary, by the above various ratio schemes or similar ratio schemes for the heat generating member 1, the temperature coefficient of resistance of the heat generating member 1 is between 0.3 ° C 10 and 350 ° C, which is 0.3 × 10 ^-3 / ° C to 3 × 10 ^-3 / ° C, so that the heating element 1 has a significant change in the heating resistance of the heat generating element 1 during the temperature rise.

Further, in the specific implementation process, the heat generating element 1 obtained by the above material ratio has good heat resistance, plasticity, weldability, toughness, and the like, and the heat generating element 1 may be in the form of a filament or a sheet. Wherein, when the heat generating component 1 is filament-shaped, the diameter thereof is set to be 0.08 mm to 0.4 mm, because the toughness and hardness of the heat generating component 1 in this embodiment are better than the conventional nickel-chromium alloy and the iron-chromium-alloy alloy, and the wire is assembled. When the heating element 1 is used, the deformation of the heating wire does not occur, and the normal operation of the heating element 1 is preferably ensured. 2a and 2b, FIG. 2a is a specific structural view of the filament-like heat generating component 1. The heat generating component 1 is a device provided with a spiral atomizing portion, and the end portion of the atomizing portion is provided with two a connecting end (11, 12) connected to the power supply module, and in combination with FIG. 2b, the atomizing portion is used for contacting the smoke adsorbing member 13 (for example, an oil absorbing cotton sleeve wound from a cotton material) to make the oil The adsorbing member 13 adsorbs the smoke oil, and the atomizing smoke oil is carried out when the heat generating member 1 works.

In a specific implementation process, the original power supply voltage of the power supply device (such as a battery) in the power supply circuit 2 is small (for example, 4.2V), in order to be able to quickly detect after the user is detected to smoke and the battery is electrically connected to the heat generating component 1. The heat generating element 1 is heated so that the temperature of the heat generating element 1 rises rapidly to the temperature water required for atomizing the smoke oil In the electronic cigarette, it is usually necessary to provide a booster circuit connected to the power supply circuit 2, in order to boost the original voltage of the battery output, so as to increase the output power when the battery output power and load are constant, and then quickly Heating the heat generating component 1; in this process, in order to increase the amount of atomized smoke to improve the user experience, the booster circuit of the existing electronic cigarette outputs the largest possible power to the heat generating component 1, but if the heating is blindly increased The power will cause the temperature of the heat generating component 1 to be too high, which eventually leads to a bad result of the scorching of the electronic cigarette. In this regard, the present embodiment provides a specific voltage adjustment circuit 3, which can be used in the process of boosting without causing burnt cotton (ie, the heat generation temperature of the heat generating component 1 is maintained within a preset temperature range). To provide the heating element 1 with as much heating power as possible.

Specifically, referring to FIG. 3, the voltage adjustment circuit 3 includes: a voltage current sampling sub-circuit 31 for detecting the current supply voltage of the heat generating component 1 and the current supply current; and a microprocessor 32 connected to the voltage current sampling sub-circuit 31, And acquiring a resistance value of the heat generating component 1 based on the current power supply voltage and the current power supply current, and acquiring a current temperature of the heat generating component 1 based on the resistance value, and when the current temperature is greater than the first preset value Or less than the second preset value, issuing a control signal; a driving sub-circuit 33 connected to the microprocessor 32 for adjusting the power supply voltage of the heat generating component 1 based on the control signal to cause the heat of the heat generating component 1 to be generated The temperature is maintained within the preset temperature range.

Further, in order to obtain the adjusted voltage for driving the heat generating component 1 based on the driving signal outputted by the driving sub-circuit 33, the driving sub-circuit 33 is specifically configured to emit the first driving signal and the second driving signal based on the control signal, still refer to FIG. The voltage adjusting circuit 3 further includes: an oscillation switch sub-circuit 34 connected to the driving sub-circuit 33 and a synchronous commutating sub-circuit 35, and the oscillation switching sub-circuit 34 receives and starts or stops working based on the first driving signal, and the synchronous commutator The circuit 35 receives and starts or stops the operation based on the second driving signal; the microprocessor 32 is further configured to determine whether the current temperature of the heat generating component 1 is greater than the first preset value after acquiring the current temperature of the heat generating component 1. Or less than the second preset value, and when the current temperature is greater than the first preset value or less than the second preset value, the control signal is issued; the driving sub-circuit 33 is configured to be based on the The first driving signal drives the oscillation switch sub-circuit 34 to start operation to charge the oscillation switch sub-circuit 34 while simultaneously driving the synchronous commutator based on the second driving signal The circuit 35 is stopped. The driving sub-circuit 33 is further configured to drive the oscillation switch sub-circuit 34 to stop operating based on the first driving signal after the charging and switching sub-circuit 34 is charged and stored, so that the oscillation switching sub-circuit 34 is synchronously rectified. The sub-circuit 35 is discharged while simultaneously driving the synchronous commutator circuit 3 based on the second drive signal 5 starts the operation so that the synchronous commutator circuit 35 synchronously rectifies the discharge current of the oscillation switch sub-circuit 34, and supplies power to the heat generating element 1 based on the synchronously rectified voltage.

The current supply voltage of the heat generating component 1 is specifically obtained by driving the oscillation switch sub-circuit 34 and the synchronous commutator circuit 35 based on the pulse width modulation signal of the first duty ratio output by the microprocessor 32. The control signal is specifically a pulse width modulation signal of a second duty ratio output by the microprocessor 32, wherein the first duty ratio is different from the second duty ratio.

For the above-mentioned "heating element supply voltage adjustment scheme", the embodiment of the present application further provides a schematic diagram of a specific voltage adjustment circuit of the electronic cigarette, and FIG. 4 and FIG. 5 together constitute a voltage adjustment circuit 3, and the model number of the STM32F030 is shown in FIG. The processor U8 and its peripheral circuits correspond to the microprocessor 32 of FIG. 3. The driver U1 of the model LM5106 in FIG. 5 and its peripheral circuits correspond to the driving sub-circuit 33 of FIG. 3, and the inductor L1 of FIG. 5 and the MOS of the model RU30E60M2. The circuit composed of the device such as the tube Q1 corresponds to the oscillation switch sub-circuit 34 in FIG. 3, and the circuit composed of the device such as the MOS tube Q2 of the model RU30E60M2 in FIG. 5 corresponds to the synchronous commutator circuit 35 in FIG. 3, and the resistor in FIG. A circuit composed of R2, a capacitor C6, and a capacitor C7 corresponds to the voltage-current sampling sub-circuit 31 of FIG. The same two or more pins or terminals are connected in FIGS. 4 and 5, for example, the pin 12-PA6 of the microprocessor U8 of FIG. 4 for outputting a PWM signal, and the driver U1 of FIG. The pin 8-IN for receiving the PWM signal is connected. For other similar connections, it will not be described here. In addition, the terminal B+ indicates the positive pole of the battery in the power supply circuit, the terminal VOT is the voltage sampling point, and the terminal VCT For the current sampling point, the heating element 1 is connected between the terminals VO+ and VO-.

The working principle of the circuit shown in FIG. 4 and FIG. 5 is: when the electronic cigarette detects the user's smoking action, the microprocessor U8 sends a signal to the signal receiving pin 8-IN of the driver U1 through the signal output pin 12-PA6. a duty cycle pulse width modulation signal (referred to as PWM), so that the driver U1 drives the device such as the inductor L1, the MOS transistor Q1 and the MOS transistor Q2, and adjusts the original output voltage of the battery to pass the adjusted voltage. Connected to the terminal VO+ and VO- to connect the heating element 1 to supply power. Further, during the heating of the heat generating component 1, the microprocessor U8 obtains the current supply voltage of the heat generating component 1 through the pins 7-PA1 and the pins 8-PA2 respectively connected to the voltage sampling point VOT and the current sampling point VCT. The current supply current is calculated, and the current heating resistance of the heat generating component 1 is calculated based on the current power supply voltage and the current power supply current, and a correspondence table of the heat generating resistor and the heat generating temperature of the heat generating component 1 is stored in the microprocessor U8, and the heat generating component 1 is The optimal temperature range of the atomized smoke oil can be obtained based on the calculated current heating resistance of the heat generating component 1 and the current heating temperature is determined. Whether the current heating temperature is within the optimal temperature range, and if the determination result is YES, the microprocessor U8 performs voltage output to the heat generating component 1 by the PWM control driver U1 of the first duty ratio, and if the result is determined If not, the microprocessor U8 adjusts the control signal output to the driver U1, and outputs the PWM of the second duty cycle to the driver U1 to drive the driver U1 based on the second duty cycle PWM drive inductance L1, MOS transistor Q1 and MOS. The device such as the tube Q2 operates to adjust the supply voltage to the heat generating member 1.

Wherein, when the driver U1 drives the device such as the inductor L1, the MOS transistor Q1 and the MOS transistor Q2 based on the PWM control signal from the microprocessor U8 (such as the PWM of the first duty ratio or the second duty ratio), the driver U1 respectively The first driving signal and the second driving signal are sent through the pin 10-LO and the pin 3-HO output, the pin 10-LO of the driver U1 is connected to the gate of the MOS transistor Q1, and the pin 3-HO and the MOS transistor Q2 The gate is connected; when receiving the PWM control signal, the driver U1 first drives the MOS transistor Q1 to be turned on by the first driving signal, and drives the MOS transistor Q2 to be turned off by the second driving signal, so that the inductor L1 oscillates, thereby charging and storing After the charging and energy storage of the inductor L1 is completed, the driver U1 drives the MOS transistor Q1 to be turned off by the first driving signal, and drives the MOS transistor Q2 to be turned on by the second driving signal. At this time, the inductor L1 is discharged and is performed by the MOS transistor Q2. Rectification to obtain a stable DC voltage, and finally to the MOS transistor Q3 of model AON7423, through the pin 14-PB0 of the microprocessor U8 output control signal VO_EN through the transistor Q4 control MOS tube Q3 on and off, to achieve the heating element 1 output voltage control to achieve The heat generation temperature of the heat generating member 1 is maintained within the preset temperature range. For example, the optimum temperature of the atomized smoke oil is 200 ° C ~ 270 ° C, when the temperature of the heating element 1 is lower than 200 ° C, adjust the duty cycle of the PWM signal output by the microprocessor U8, the PWM signal through the pin 12-PA6 Passed to the pin 8-IN of the LM5106, the LM5106 transmits the signal to the oscillation switch sub-circuit through the pin 10-LO to boost the voltage. When the operating temperature of the electronic cigarette heat-generating component 1 exceeds 270 °C, it can be adjusted. The duty ratio of the PWM signal outputted by the microprocessor U8 is stepped down to ensure that the smoke oil is always at a good atomization temperature. When the amount of smoke oil is small, the micro controller U8 detects that the temperature of the heat generating element 1 rises sharply. The alarm signal will be sent, and the micro controller U8 controls the MOS tube Q3 to be disconnected, which can avoid the occurrence of burning of charcoal and burning of cotton.

In addition, FIG. 6 is a battery protection circuit of the electronic cigarette in the present scheme, and the battery is protected by an IC of the type MM3280, and the MM3280 series IC adopts a high-voltage CMOS manufacturing process for overcharging the lithium battery/polymer battery for two times. It can protect against over-discharge and discharge over-current. When a single-cell lithium battery/polymer battery is overcharged, overdischarged, discharged, overcurrent, shorted, overcharged, and overcharged It has a certain protective effect when the charger is pressed.

In summary, by implementing the solution of the present application, a heat-generating member of a specific material (the constituent materials thereof comprises, in weight percentage, 0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015) %～0.045% phosphorus, 0.01%～0.03% sulfur, 16.5%～20% chromium, 8.5%～15% nickel, and iron), the temperature coefficient of resistance is large, so that the heating element is energized and heated. In the middle, the heating resistance changes significantly with the change of temperature, and the temperature change of the heating element can be obtained by obtaining the heating resistance of the heating element through the voltage adjusting circuit, and the temperature of the heating element is controlled to be appropriate based on the temperature change. The temperature range is effectively solved; in the prior art, the electronic cigarette cannot detect the temperature of the heating wire by detecting the resistance of the heating wire to control the temperature of the heating wire when the temperature is too high, and by setting a temperature sensor in the electronic cigarette. To detect the temperature change of the heating wire to control the temperature of the heating wire, so that the electronic circuit internal circuit volume and design complexity increase technical problems, the atomizer heating When heating (such as heating wire), the heating resistance of the heating element is detected to monitor and control its temperature, so that the temperature is not too high, and there is no need to add a temperature sensor in the electronic cigarette, and the inside of the electronic cigarette is not increased. The technical effect of the size and design complexity of the circuit.

In addition, according to the proportioning scheme of the heat-generating component in the embodiment, the heat-resistant component has high corrosion resistance and high-temperature strength, and the high-temperature resistance can reach 1200° C. to 1300° C., and the chemical property is relatively stable, and is not easily corroded by the smoke oil and does not pollute. Smoke oil. An austenitic crystal structure is formed inside the heat generating member to improve alloy properties such as plasticity, weldability and toughness, because the toughness and hardness are better than those of the conventional nickel-chromium alloy and the iron-chromium-aluminum alloy, in the case of assembling the heat generating member. , there will be no deformation of the heating element, which better guarantees the normal operation of the heating element.

Embodiment 2

Based on the same inventive concept, please refer to FIG. 7. The embodiment of the present invention further provides a temperature control method for the electronic cigarette heating element 1 , including the steps of:

S1, in the process of energizing the heat generating component 1 of the electronic cigarette for atomizing the smoke oil, detecting the resistance value of the heat generating component 1 to obtain the current temperature of the heat generating component 1;

S2: Adjusting a power supply voltage of the heat generating component 1 when the current temperature is greater than a first preset value or less than a second preset value, so that a heat generation temperature of the heat generating component 1 is maintained within a preset temperature range.

Specifically, the step S1 is specifically:

During the energization operation of the heat generating component 1 for atomizing the smoke oil of the electronic cigarette, detecting the current power supply voltage and the current power supply current of the heat generating component 1 and acquiring the heat based on the current power supply voltage and the current power supply current The resistance value of the component 1 and the current temperature of the heat generating component 1 is obtained based on the resistance value.

According to the above description, the electronic cigarette heating element temperature control method is applied to the electronic cigarette, and therefore, one or more embodiments of the method are the same as the one or more embodiments of the electronic cigarette, and are no longer one by one. I will go into details.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims mean All changes and modifications that come within the scope of the invention are intended to be included.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

An electronic cigarette characterized by comprising a heat generating component (1), a power supply circuit (2) and a voltage adjusting circuit (3);

The heat generating component (1) is used for atomizing smoke oil, and the resistance value of the heat generating component (1) becomes larger as the temperature increases;

The power supply circuit (2) is configured to supply power to the heat generating component (1);

The voltage adjustment circuit (3) is configured to detect a resistance value of the heat generating component (1) to obtain a current temperature of the heat generating component (1), and when the current temperature is greater than a first preset value or less than a second preset value, adjusting a power supply voltage of the heat generating component (1) to maintain a heating temperature of the heat generating component (1) within a preset temperature range;

Wherein, the material of the heat generating component (1) is in weight percentage, and includes:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 8.5% ~15% nickel, and iron.
The electronic cigarette according to claim 1, wherein the heat-generating member (1) has a temperature coefficient of resistance of 0.3 × 10 -3 / ° C to 3 × 10 -3 / between 0 ° C and 350 ° C / °C.
The electronic cigarette according to claim 1, wherein the heat generating member (1) further comprises: 2% to 3.5% of molybdenum by weight.
The electronic cigarette according to claim 1, wherein the heat generating member (1) specifically comprises:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 8.5% ～15% of nickel, and iron which makes the weight percentage of the heat generating member (1) as a whole 100%.
The electronic cigarette according to claim 1, wherein the heat generating member (1) specifically comprises:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 20% chromium, 10.5% ~ 14.5% of nickel, and iron which makes the weight percentage of the heat generating member (1) as a whole 100%.
The electronic cigarette according to claim 1, wherein the heat generating member (1) specifically comprises:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 10.5% ～13.5% of nickel, 2% to 2.5% of molybdenum, and iron which makes the weight percentage of the heat generating element (1) as a whole 100%.
The electronic cigarette according to claim 1, wherein the heat generating member (1) specifically comprises:

0.02% to 0.08% carbon, 0.05% to 1% silicon, 1% to 2% manganese, 0.015% to 0.045% phosphorus, 0.01% to 0.03% sulfur, 16.5% to 18.1% chromium, 12.5% ～14.5% of nickel, 2% to 2.5% of molybdenum, and iron which makes the weight percentage of the heat generating element (1) as a whole 100%.
The electronic cigarette according to any one of claims 1 to 7, characterized in that the heat generating element (1) is in the form of a filament or a sheet.
The electronic cigarette according to any one of claims 1 to 7, wherein the heat generating element (1) is specifically filament-shaped and has a diameter of 0.08 mm to 0.4 mm.
The electronic cigarette according to any one of claims 1 to 7, wherein the voltage adjustment circuit (3) comprises:

a voltage current sampling sub-circuit (31) for detecting a current supply voltage and a current supply current of the heat generating component (1);

a microprocessor (32) connected to the voltage current sampling sub-circuit (31) for acquiring a resistance value of the heat generating component (1) based on the current power supply voltage and the current supply current, and based on the The resistance value acquires a current temperature of the heat generating component (1), and sends a control signal when the current temperature is greater than the first preset value or less than the second preset value;

a driver subcircuit (33) coupled to the microprocessor (32) for The control signal adjusts the power supply voltage of the heat generating component (1) to maintain the heat generation temperature of the heat generating component (1) within the preset temperature range.
The electronic cigarette according to claim 10, wherein the driving sub-circuit (33) is specifically configured to emit a first driving signal and a second driving signal based on the control signal; the voltage adjusting circuit (3) further include:

An oscillation switch sub-circuit (34) and a synchronous commutator circuit (35) connected to the driving sub-circuit (33), the oscillation switch sub-circuit (34) receiving and starting or stopping operation based on the first driving signal The synchronous commutator circuit (35) receives and starts or stops working based on the second driving signal;

The microprocessor (32) is further configured to determine, after acquiring the current temperature of the heat generating component (1), whether a current temperature of the heat generating component (1) is greater than the first preset value or less than the first Two preset values, and the control signal is issued when the current temperature is greater than the first preset value or less than the second preset value; the driving sub-circuit (33) is configured to be based on the first a driving signal drives the oscillation switch sub-circuit (34) to start operation to charge and store the oscillation switch sub-circuit (34), while the driving sub-circuit (33) is configured to be driven based on the second driving signal The synchronous commutator circuit (35) stops working; the driving sub-circuit (33) is further configured to drive the oscillation based on the first driving signal after the oscillating switch sub-circuit (34) is charged and stored The switch sub-circuit (34) is stopped to discharge the oscillation switch sub-circuit (34) to the synchronous commutator circuit (35) while the drive sub-circuit (33) is further configured to be based on the second drive Signaling the synchronous commutator circuit (35) to start operation to cause the synchronous commutator circuit (35) The oscillation sub-discharge current switching circuit (34) performs synchronous rectification, and based on the voltage of the synchronous rectification to the heating element (1) power.
The electronic cigarette according to claim 11, wherein the current supply voltage of the heat generating component (1) is specifically: the driver subcircuit (33) is based on the output of the microprocessor (32) a duty cycle pulse width modulation signal driving the voltage obtained by the oscillation switch sub-circuit (34) and the synchronous commutator circuit (35);

The control signal is specifically a pulse width modulation signal of a second duty ratio output by the microprocessor (32), wherein the first duty ratio is different from the second duty ratio.
A method for controlling temperature of an electronic cigarette heating element, comprising the steps of:

S1, in the process of energizing the heat generating component (1) of the electronic cigarette for atomizing the smoke oil, detecting a resistance value of the heat generating component (1) to obtain a current temperature of the heat generating component (1);

S2, adjusting a power supply voltage of the heat generating component (1) when the current temperature is greater than a first preset value or less than a second preset value, so that a heat generation temperature of the heat generating component (1) is maintained at a preset Within the temperature range.
The heating element (1) temperature control method according to claim 13, wherein the step S1 is specifically:

During a power-on operation of the heat-generating component (1) of the electronic cigarette for atomizing the smoke oil, detecting a current supply voltage and a current supply current of the heat-generating component (1), and based on the current supply voltage and the current The supply current acquires the resistance value of the heat generating component (1), and acquires the current temperature of the heat generating component (1) based on the resistance value.