RU2785040C1 - Contact-free electronic cigarette heater (variants), method and apparatus for controlling heating in the contact-free heater, machine-readable medium and computer apparatus for implementing the method for controlling heating in the contact-free heater - Google Patents

Abstract

FIELD: smoking devices.

SUBSTANCE: group of inventions relates to the field of electronic cigarettes. Apparatus for controlling the heating of a ceramic heater in a contact-free electronic cigarette heater, wherein the ceramic heater comprises a heating body and a heating circuit, wherein the heating body is cylindrical, and a porous channel is located in the heating body. The heating circuit is located on the heating body in order to heat the air passing through the porous channel. The apparatus for controlling heating comprises a time counting module, a current detection module, and a voltage control module. The voltage control module herein is intended for controlling the heating circuit using a first operating voltage to heat when the contact-free electronic cigarette heater is activated. The time counting module is intended for calculating the duration of operation of the heating circuit when the contact-free electronic cigarette heater is activated. The current detection module is intended for determining the operating current of the heating circuit.

EFFECT: ensured uniform and efficient heating of the smoking article.

12 cl, 10 dwg

Description

Technical field

The present invention relates to the field of electronic cigarettes, in particular to a method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, a device for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, and also to a non-contact heater of electronic cigarettes with a heating control device.

State of the art

A smoking article such as cigarettes and cigars burns tobacco during use and produces tobacco smoke. A burning cigarette contains many carcinogenic substances, such as tar, in its smoke, and prolonged inhalation of these substances can cause great harm to the human body. With the scientific and technological progress of science and technology and people's continuous pursuit of a healthy lifestyle, a cigarette substitute has emerged, namely electronic cigarettes. In particular, non-combustion heating, which releases the active substances in the smoking article, such as nicotine, is one typical solution for electronic cigarettes.

Non-burning heating of electronic cigarettes basically uses the working principle of low temperature heating to heat the smoking article up to about 300°C, thereby burning active ingredients in smoking articles such as nicotine. Due to the fact that the combustion temperature is not reached, the amount of harmful substances in the smoking article, such as tar, is significantly reduced.

In the related art, for heating electronic cigarettes without combustion, a contact heating scheme is generally used to heat a smoking article, for example, inserting a sword-shaped needle heater into the smoking article for heating. But the contact heating circuit has the disadvantage of uneven heating, that is, the temperature of the part directly in contact with the heater is relatively high, and the temperature of the part far from the heater gradually decreases rapidly, so that only the tobacco part near the heater can be completely baked. This can cause incomplete baking of the tobacco in the smoking article, not only resulting in a large waste of tobacco, but also an insufficient amount of smoke. If you increase baking efficiency by raising the temperature of the heater, it can easily cause tobacco fire near the heater, and not only affect the taste, but also cause a significant increase in harmful ingredients, affect health.

The essence of the invention

This application is based on the knowledge and research of the author on the following issues:

In the non-burning electronic cigarette heating operation, because the contact heating circuit has the disadvantage of uneven heating, incomplete heating of the smoking article is bound to occur. This not only leads to a large waste of tobacco, but also to an insufficient amount of smoke.

Therefore, after a lot of research and experimentation, the author found that the puffing process itself is an air flow process, if the temperature of the air flowing into the smoking article is high, the hot air can directly heat the smoking article, also because the hot air can relatively completely and uniformly penetrate and heat the entire tobacco of the smoking article during puffing, the problem of uneven heating can be effectively solved. Therefore, the air should be heated first, then in the puffing process, use the hot air flow to heat the smoking article, thus performing heating. This gives the best overall heating effect.

The present invention aims to solve one of the above technical problems, at least to a certain extent. Therefore, the first object of the present invention is to provide a method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes. The required air heating effect can be obtained by controlling the operating voltage of the heating circuit. Ceramic heater does not need dynamic power compensation based on airflow sensor, and also does not need temperature detection and control based on temperature sensor, this not only simplifies the complexity of the control system, but also has a better control response effect.

The second object of the present invention is to provide a device for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes. The third object of the present invention is to provide a non-contact heater for electronic cigarettes.

To solve the above problem, the first object of the present invention is a method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, wherein the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, a porous channel is located in the heating body; the heating circuit is located on the heating body to heat the air passing through the porous channel, the heating control method includes the following steps: when the contactless electronic cigarette heater is turned on, controlling the heating circuit using the first operating voltage for heating, determining the heating circuit operation time; determination of the operating current of the heating circuit; performing control to lower the operating voltage of the heating circuit in accordance with the operating time of the heating circuit and the operating current of the heating circuit.

The method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes according to an embodiment of the present invention, due to the porous honeycomb structure of the heating body, can ensure that the heat capacity of the ceramic heater is sufficient to make the temperature effect of the air flow on the heater when simulating the puffing process small. In addition, the heating circuit has a clear temperature-sensing effect, so when the contactless electronic cigarette heater is turned on, first the controlled heating circuit uses the first operating voltage for heating, then, according to the heating circuit operating time and the heating circuit operating current, the heating circuit operating voltage lowering control is performed. , that is, by controlling the operating voltage of the heating circuit, it is possible to obtain the effect of heating the air necessary for puffing cigarettes without dynamic power compensation based on the air flow sensor, and without temperature detection and control based on the temperature sensor. This not only reduces the complexity of the control system, but also has a better control response effect.

In addition, the ceramic heater heating control method in the contactless electronic cigarette heater provided according to the above embodiment of the present invention may also have the following additional specifications:

Further, after completion of the voltage reduction, the operating voltage of the heating circuit is adaptively controlled according to the rate of change of the operating current of the heating circuit.

After the voltage reduction is completed, the operating voltage of the heating circuit is adaptively adjusted according to the rate of change of the operating current of the heating circuit, and the amount of smoke required by the puffing habit of different groups of people can be provided, and the user experience can be improved.

Further, adaptive control of the heating circuit operating voltage according to the heating circuit operating current change rate includes: whether the heating circuit operating current change rate is within a predetermined current change rate interval; if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the range of the rate of change of the current, then the operating voltage for controlling the heating circuit is lowered; if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the range of the rate of change of the current, then the operating voltage for controlling the heating circuit is raised; if the rate of change of the operating current of the heating circuit is within a predetermined range of the rate of change of the current, then the operating voltage for controlling the heating circuit is left unchanged.

Further, performing the heating circuit operating voltage lowering control according to the heating circuit operating time and the heating circuit operating current includes: determining whether the heating circuit operating current reaches a predetermined threshold value; if the operating current of the heating circuit reaches a predetermined threshold value, then a corresponding voltage reduction curve is obtained in accordance with the operating time of the heating circuit, and the operation voltage of the heating circuit is controlled to decrease in accordance with the obtained voltage reduction curve.

Further, dividing the heating circuit running time into several time periods, each time period corresponding to a voltage declining curve, wherein obtaining a corresponding declining curve according to the heating circuit running time includes: determining a time period for the heating circuit running time; obtaining an appropriate voltage reduction curve in accordance with the time period for the heating circuit operating time.

Further, when the running current of the heating circuit reaches the predetermined current threshold, if the running time of the heating circuit is greater than or equal to the predetermined threshold time, the heating circuit operating voltage is controlled to be reduced using a plurality of voltage reduction curves, with the voltage reduction rate corresponding to the plurality voltage drop curves, decreases sequentially.

Additionally, a heating circuit in the form of a thick film circuit is printed on the outer surface of the heater.

To solve this problem, the second object of the present invention is a device for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, wherein the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, a porous channel is located in the heating body; a heating circuit is located on the heating body to heat the air passing through the porous channel; the heating control device includes a time counting module, a current detection module, and a voltage control module, the voltage control module is for controlling the heating circuit using the first operating voltage for heating when the contactless heater of electronic cigarettes is turned on; the time counting module is designed to count the operating time of the heating circuit when the non-contact heater of electronic cigarettes is turned on; the current detection module is used to determine the operating current of the heating circuit; the voltage control module is also designed to perform lowering control of the operating voltage of the heating circuit in accordance with the operating time of the heating circuit and the operating current of the heating circuit.

In the ceramic heater heating control apparatus of the non-contact electronic cigarette heater of the present invention, due to the porous honeycomb structure, the heating body can provide sufficient heat capacity of the ceramic heater so that the temperature effect of the air flow on the heater when simulating the puffing process is small. In addition, the heating circuit has a clear temperature-sensing effect, so when the contactless electronic cigarette heater is turned on, the voltage control module first controls the heating circuit using the first operating voltage for heating, then, according to the heating circuit operating time and the heating circuit operating current, the operation voltage reduction control is performed. heating circuit, that is, by controlling the operating voltage of the heating circuit, the effect of heating the air required for puffing cigarettes can be obtained without dynamic power compensation based on the air flow sensor, and without temperature detection and control based on the temperature sensor, this not only reduces the complexity of the control system but also has better control response effect.

In addition, the ceramic heater heating control device in the contactless electronic cigarette heater according to the above-described embodiment of the present invention may also have the following additional specifications:

Further, the voltage control module is also used to adaptively adjust the operating voltage of the heating circuit according to the rate of change of the operating current of the heating circuit, after completion of the voltage reduction.

Also, after the voltage reduction is completed, the heating circuit operating voltage is adaptively adjusted according to the heating circuit operating current change rate, and the amount of smoke required by the puffing habit of different groups of people can be met, and the user experience can be improved.

Additionally, the voltage control module is also designed to determine whether the rate of change of the operating current of the heating circuit is within a predetermined range of the rate of change of the current; to control the operating voltage of the heating circuit downwards, if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the rate of change interval, to control the operating voltage of the heating circuit upwards, if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the rate of change interval current, to control the operating voltage of the heating circuit to remain unchanged if the rate of change of the operating current of the heating circuit is within the range of the current change rate.

Further, the voltage control unit is also for determining whether the operating current of the heating circuit reaches a predetermined threshold value, and for obtaining an appropriate undervoltage curve according to the running time of the heating circuit, and for controlling the undervoltage of the heating circuit operating voltage according to the obtained undervoltage curve. if the operating current of the heating circuit has reached a predetermined threshold.

Additionally, the voltage control module is also designed to divide the heating circuit operation time into several time periods, each time period corresponds to a voltage reduction curve, and to determine the time period for the heating circuit operation time and obtain the corresponding voltage reduction curve according to the heating circuit operation time. .

Additionally, the voltage control module is also designed to, when the operating current of the heating circuit reaches a predetermined current threshold, if the operating time of the heating circuit is greater than or equal to the predetermined threshold time, to control the decrease in the operating voltage of the heating circuit using a plurality of voltage reduction curves, while the voltage reduction rate corresponding to the plurality of voltage reduction curves is sequentially reduced.

Additionally, a heating circuit in the form of a thick film circuit is printed on the outer surface of the heater.

In order to achieve the above object, a third aspect of the present invention is a non-contact electronic cigarette heater comprising the above-described ceramic heater heating control device in the non-contact electronic cigarette heater.

By using the non-contact electronic cigarette heater according to the embodiment of the present invention with the above heating control device, it is possible to obtain the effect of heating the air by controlling the operating voltage of the heating circuit necessary to puff cigarettes, without dynamic power compensation based on the airflow sensor, and without temperature detection and control. Based on the temperature sensor, it not only reduces the complexity of the control system, but also has a better control response effect.

Another object of the present invention is a computer-readable medium that stores a ceramic heater heating control program in a non-contact heater of electronic cigarettes, when the heating control program is implemented, the above-described method of controlling heating of a ceramic heater in a non-contact heater of electronic cigarettes is performed.

Another object of the present invention is a computer device containing a memory device, a processor and a computer program stored in the memory device and capable of executing on the processor. When the processor executes the computer program, the above-described method for controlling the heating of the ceramic heater in the non-contact heater of electronic cigarettes is executed.

Another object of the present invention is a non-contact heater of electronic cigarettes, which contains a ceramic heater, the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, a porous channel is located in the heating body; a heating circuit is located on the heating body to heat the air passing through the porous channel. The contactless electronic cigarette heater also includes a memory device, a processor, and a computer program stored in the memory device and capable of executing on the processor. When the processor executes this computer program, the above-described method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes is performed.

In addition, the non-contact air-heating electronic cigarette heater of the embodiment of the present invention includes a heating block, a shielding tube, and a heat recovery device, wherein the first honeycomb porous channel, the first honeycomb porous channel, are disposed in the side wall of the heat recovery device. separating the heat recovery device into an outer wall and an inner wall; a shielding tube is located in the inner wall of the heat recovery device, a heating element is inserted into the shielding tube, the heating block is connected to the heat energy recovery device by means of a shielding tube; a heating body is located in the heating block; a heating circuit is located on the heating body, a wire is located at the end of the heating circuit, a second honeycomb porous channel is located in the heating body.

Further, the heating block includes a preheating tube, a baffle and a heater installed from top to bottom in the order of enumeration, a plurality of guide holes are located on the baffle.

Further, the heating block and the heat recovery device are made of high purity alumina ceramic with a density of at least 3.86 g/cm ³ .

Further, the first honeycomb porous channel and the second honeycomb porous channel are formed by evenly spaced square holes or polygonal holes, the hole size range is from 0.1 to 2 mm, the minimum distance between two adjacent holes is from 0.1 to 0.5 mm.

Further, printed heating circuit materials include, but are not limited to, silver, tungsten, MoMn (molybdenum-manganese).

Further wire materials include, but are not limited to, silver, copper, and nickel.

The non-contact air-heating electronic cigarette heater according to the present invention heats air using a heating block so that the heated airflow evenly heats tobacco to increase the volume of smoke. Due to the fact that the heating block and the heat recovery device are made of high purity alumina ceramic, which has a high density and almost no pores in microstructure. contaminants in the liquid cannot penetrate them, cannot leave dirt and odor on the surface. Also, the method of heating the air provides protection of the device from contamination due to the lack of contact with the cartridge.

Description of attached drawings

In FIG. 1 is a block diagram of a non-contact air heated electronic cigarette heater according to an embodiment of the present invention.

In FIG. 2 shows a diagram of a ceramic heater according to an embodiment of the present invention.

In FIG. 3 shows a deflector according to an embodiment of the present invention.

In FIG. 4 shows a heat recovery device according to an embodiment of the present invention.

In FIG. 5 is a block diagram of a smoking article holder according to an embodiment of the present invention.

In FIG. 6 is a block diagram of a smoking article holder according to another embodiment of the present invention.

In FIG. 7 is a block diagram of a smoking article holder according to the third embodiment of the present invention.

In FIG. 8 is a flowchart of a method for controlling heating of a ceramic heater in an electronic cigarette contactless heater according to an embodiment of the present invention.

In FIG. 9 is a flowchart of a method for controlling heating of a ceramic heater in an electronic cigarette contactless heater according to one embodiment of the present invention.

In FIG. 10 is a schematic diagram of a ceramic heater heating control device in an electronic cigarette contactless heater according to an embodiment of the present invention.

Detailed description of exemplary embodiments

Examples of implementation of the present invention are described in detail below. Examples are shown in the attached figures. In this case, the same or similar designations always indicate the same or similar elements or elements with the same or similar functions. The following exemplary embodiments based on the accompanying figures are illustrative, are intended to explain the present invention, and should not be understood as limiting the present invention.

In order to better understand the above technical solutions, illustrative embodiments of the present invention will be described in more detail below with reference to the accompanying figures. Although the accompanying figures show illustrative embodiments of the present invention, it should be understood that the present invention can be implemented in various forms, not limited to the embodiments described here. On the contrary, these exemplary embodiments are provided so that the present invention can be more clearly understood, while at the same time fully conveying the scope of the present invention to a person skilled in the art.

In order to better understand the above technical solutions, the above technical solutions will be described in detail below based on the attached figures and specific implementation methods.

First, after a lot of research and experimentation, the present inventor has found that preheating the air and using the hot air flow during the puffing process to heat the smoking article allows a better overall heating effect to be obtained.

But in order to carry out air heating, it is first necessary to select a suitable air heating heater. When the heater heats the air, the temperature of the air entering the heater is at room temperature, the temperature of the air leaving the heater is more than 300°C. Secondly, the general puffing habit must be taken into account, when the temperature increase process must maintain about 20 ml per second, and each puff lasts approximately 3 seconds. The heater requires a total heating efficiency of about 60 ml of air.

After a lot of experiments, the author came to the conclusion that in order to achieve the above effect when using a filament to heat air, a higher temperature of the filament is required to heat the air only by the filament, and only when the temperature of the filament is higher than 600 ° C, can heat the flowing air to a temperature above 300°C. If the airflow is leaking, the heating wire will cool rapidly, so that one puff will reduce the temperature of the filament by 200-300°C. Therefore, it is necessary to compensate for the power of the filament when puffing, otherwise it is difficult to achieve the effect of heating the air necessary to puff the cigarette. With power compensation by air flow sensor detecting the presence of air flow due to the small filament-air contact area, this example of power compensation not only requires high power to achieve the desired heating effect, but also creates the problem of uneven temperature in all directions due to inaccurate air temperature and untimely compensation response after heating.

At the same time, when the flowing air is heated by increasing the temperature of the filament above 300 ° C, due to the increase in the temperature of the filament and direct contact with air, metal ions separated from the filament can mix with the flow of smoking air and enter the human body. harm human health.

Based on the above, after a lot of research, the present inventor has concluded that, when using the example of heating air to heat a smoking article, the air heating heater should have a large heating area in order to reduce the temperature difference between the heater and the air. At the same time, the heater must also have a large heat capacity to resist cooling after passing through the smoking air flow, and the heater must also have a higher thermal conductivity in order to shorten the heating preparation time.

Therefore, based on many years of in-depth research on ceramics, the applicant found that the porous structure of honeycomb ceramics can obtain a large heating surface area, so that the heater has high air heating efficiency, at the same time, honeycomb ceramics of the porous structure is more like a solid structure, has a higher heat capacity than a ceramic tube. the same volume. The thermal conductivity of the aluminum oxide material is more than 30 W/m⋅K. This can provide faster and more uniform heat transfer as well as high thermal conductivity, so that the honeycomb ceramic porous structure heater can meet the heating needs of a smoking article by heating air.

The heating control method of the ceramic heater in the contactless electronic cigarette heater, the heating control device for the ceramic heater in the contactless electronic cigarette heater, and the contactless electronic cigarette heater with the heating control device are described below as exemplary embodiments of the present invention based on the accompanying figures.

As shown in FIG. 1 and FIG. 2, a ceramic heater 10 according to an embodiment of the present invention comprises a heating body 11 and a heating circuit 12.

Specifically, the heating body 11 is cylindrical, and a porous passage 101 is provided in the heating body 11. A heating circuit 12 is provided on the heating body 11 to heat the air passing through the porous passage 101.

That is, the heating circuit 12 performs heating after the power is turned on to heat the air passing through the porous passage 101 to perform the air uniform heating function.

Additionally, the heating body 11 may have a cylindrical shape, also a polygonal cylindrical shape, such as prismatic, square, pentagonal, and so on. This is not specifically limited to the present invention.

As an exemplary embodiment, as shown in Figure 2, the heating body 11 is a cylinder, and the porous channel 101 is located in the heating body 11 in the axial direction.

However, as shown in FIG. 2, the heating circuit 12 in the form of a thick film circuit is printed on the outer surface of the heating body 11, for example, in the form of a heating coil surrounding the outer surface of the heating body 11, and integrally formed with the heating body 11.

According to an exemplary embodiment of the present invention, the material of the printed heating circuit 12 is silver, tungsten, or molybdenum-manganese.

More specifically, a heating circuit in the form of a heating thick-film silver paste is printed on an outer wall of a cylindrical honeycomb ceramic heater. Because the ceramic heating body 11 has a porous honeycomb structure, the heating surface area of the heater can be greatly increased. It has been experimentally proven that by heating the ceramic heater 11 to a temperature of about 380°C, it is possible to heat the air to a temperature above 300°C. Also, the ceramic heating body 11 has a higher heat capacity. After each puff, an air flow, for example, 50 ml, passes through the ceramic heating body, while the temperature decrease is small, only 20-30°C.

When the heating circuit 12 is printed on the outer surface of the heating body 11 in the form of a thick film circuit, its heating resistance is usually a PTC, that is, the resistance increases as the temperature rises. After repeatedly experimenting with raising and lowering the temperature, it is found that the temperature of the ceramic heater is consistent with the resistance, so it is possible to determine the temperature of the ceramic heater by measuring the resistance value. Thus, with a constant voltage of the DC power supply, using the self-compensation effect of the thick film heating circuit (decrease the temperature of the heater, decrease the resistance value, increase the current, increase the power), it is possible to return the temperature of the heater to its original temperature within a few seconds. In the absence of air flow, the temperature of the heater can be stably maintained without fluctuations.

Therefore, in the exemplary embodiment of the present invention, due to the honeycomb structure, the heating body 11 can provide sufficient heat capacity of the ceramic heater so that the temperature effect of the air flow on the heater is small when simulating the puffing process. Power compensation is not required, because due to self-regulation, the effect of heating the air necessary for puffing cigarettes can be achieved.

However, the heating circuit 12 printed on the heating element 11 in the form of a thick film circuit has a clear temperature sensing effect. The resistance increases with increasing temperature and decreases with decreasing temperature. The heating circuit itself can be used as a temperature sensor, so no temperature sensor is required to control the temperature of the heater.

Accordingly, as shown in FIG. 8, the method for controlling the heating of a ceramic heater in a contactless electronic cigarette heater according to an embodiment of the present invention includes the following steps:

Step S1, in which, when the contactless electronic cigarette heater is turned on, the heating circuit is controlled using the first operating voltage for heating, and the operating time of the heating circuit is determined.

That is, when the contactless electronic cigarette heater is turned on, a constant voltage is first applied to the heating circuit, using high power to increase the temperature rise rate, and the operating time of the heating circuit is determined at the same time.

Step S2, in which the operating current of the heating circuit is determined.

Step S3, in which, in accordance with the running time of the heating circuit and the operating current of the heating circuit, control is performed to lower the operating voltage of the heating circuit.

That is, since the voltage is constant in the fast heating step, and the resistance of the heating circuit increases with increasing temperature, the operating current of the heating circuit decreases with increasing temperature, and the operating temperature of the ceramic heater can be expressed in terms of the operating current of the heating circuit, and lowering control can be performed. heating circuit voltage after the ceramic heater reaches a certain operating temperature according to the heating circuit operating time and the heating circuit operating current, in order to perform heat balance control.

Therefore, according to the method for controlling the heating of the ceramic heater in the non-contact heater of electronic cigarettes according to the embodiment of the present invention, due to the porous honeycomb structure, the heating body can provide sufficient heat capacity of the ceramic heater so that the temperature effect of the air flow on the heater when simulating the puffing process is small. In addition, the heating circuit has a clear temperature-sensitive effect, so when the contactless electronic cigarette heater is turned on, the controlled heating circuit first uses the first operating voltage to heat, then according to the heating circuit operating time and the heating circuit operating current, the heating circuit operating voltage is lowered control, that is, by controlling the operating voltage of the heating circuit, it is possible to obtain an air heating effect necessary for puffing cigarettes without dynamic power compensation based on the air flow sensor, and without temperature detection and control based on the temperature sensor. This not only reduces the complexity of the control system, but also has a better control response effect.

Further, as shown in FIG. 9, the method for controlling heating of a ceramic heater in a non-contact heater of electronic cigarettes provided by an embodiment of the present invention includes the following steps.

Step S1, in which, when the contactless electronic cigarette heater is turned on, the heating circuit is controlled using the first operating voltage for heating, and the operating time of the heating circuit is determined.

That is, when the contactless electronic cigarette heater is turned on, a constant voltage is first applied to the heating circuit, using high power to increase the temperature rise rate, and the operating time of the heating circuit is determined at the same time.

Step S2, in which the operating current of the heating circuit is determined.

Step S3, in which, in accordance with the running time of the heating circuit and the operation current of the heating circuit, the operation voltage of the heating circuit is lowered.

That is, since the voltage is constant in the fast heating step, and the resistance of the heating circuit increases with increasing temperature, the operating current of the heating circuit decreases with increasing temperature, and the operating temperature of the ceramic heater can be expressed in terms of the operating current of the heating circuit, and lowering control can be performed. heating circuit voltage after the ceramic heater reaches a certain operating temperature according to the heating circuit operating time and the heating circuit operating current, in order to perform heat balance control.

Step S4, in which, after completion of the voltage reduction, the operating voltage of the heating circuit is adaptively adjusted in accordance with the change rate of the operating current of the heating circuit.

That is, in the heat balance stage, after the completion of the puffing voltage reduction, the operating current of the heating circuit will increase depending on the smoke volume of each puff of different groups of people. The rate of change of the current is different, so to meet the habits of different groups of people, the operating voltage of the heating circuit can be adaptively adjusted according to the rate of change of the operating current of the heating circuit to meet the habits of different groups of people.

According to the exemplary embodiment of the present invention, step S4, in which, according to the rate of change of the operating current of the heating circuit, the operating voltage of the heating circuit is adaptively adjusted, comprising: determining whether the rate of change of the operating current of the heating circuit is within a predetermined range of the rate of change of the current; if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the interval of the rate of change of current, then the operating voltage of the heating circuit is reduced; if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the interval of the rate of change of current, then the operating voltage of the heating circuit is increased; if the rate of change of the operating current of the heating circuit is within the range of the rate of change of the current, then the operating voltage for controlling the heating circuit is left unchanged.

In particular, it is possible to set a predetermined current change rate interval according to the actual situation.

That is, in the state of heat balance, if the user's smoke volume per puff is large, the rate of change of the heating circuit current is large, and in order to ensure heat balance, it is necessary to reduce the operating voltage of the heating circuit, for example, can be reduced by one division, can be reduced by changing the threshold voltage value (0.1V). If the user's smoke volume per puff is small, then the rate of change of the heating circuit current is small, and in order to ensure thermal balance, it is necessary to increase the operating voltage of the heating circuit, for example, it can be increased by one division, it can be increased by changing the voltage threshold (0.1V). If the user's smoke volume per puff is moderate, then the rate of change of the heating circuit current is within the set range of the current change rate, and there is no need to adjust the operating voltage of the heating circuit, it remains unchanged.

Therefore, the heating control method of the ceramic heater in the non-contact heater of electronic cigarettes according to the embodiment of the present invention, due to the porous honeycomb structure of the heating body, can ensure that the heat capacity of the ceramic heater is sufficient so that the temperature effect of the air flow on the heater when simulating the puffing process is small. In addition, the heating circuit has a clear temperature-sensitive effect, so when the contactless electronic cigarette heater is turned on, the controlled heating circuit first uses the first operating voltage for heating, then, according to the heating circuit operating time and the heating circuit operating current, the heating circuit operating voltage is lowered. That is, by controlling the operating voltage of the heating circuit, it is possible to obtain an air heating effect necessary for puffing cigarettes without dynamic power compensation based on the air flow sensor, and without temperature detection and control based on the temperature sensor. This not only reduces the complexity of the control system, but also has a better control response effect. In addition, after the voltage lowering is completed, also in accordance with the rate of change of the heating circuit operating current, the heating circuit operating voltage is adaptively adjusted, and the amount of smoke required by the puffing habit of different groups of people can be provided and the user experience can be improved.

Additionally, according to an embodiment of the present invention, the through holes of the porous channel 101 are round holes or polygonal holes.

However, in the exemplary embodiment, the through holes of the porous channel 101 may be evenly distributed in the heating element 11 as shown in FIG. 2.

Further, when the heating element 11 is cylindrical, the through holes of the porous passage 101 can be uniformly distributed along the circumferential direction. Or, as shown in FIG. 2, when the through holes of the porous channel 101 are polygonal holes, they can be distributed in the cylinder in a centrally symmetrical manner.

It can be understood that in the exemplary embodiment of the present invention, the distribution of the through holes of the porous channel 101 may not be limited if the heating element 11 has a porous honeycomb structure.

Specifically, in the exemplary embodiment of the present invention, the diameter of the through hole of the porous channel 101 is 0.1 to 2 mm, such as 0.5 mm, 1 mm, and so on, the distance between two adjacent through holes is 0.1 to 0.5 mm, such as 0.2mm, 0.4mm and so on. It is understood that the diameter of the through hole of the porous channel 101 and the distance between two adjacent through holes can be limited according to the specific conditions of the heating body 11, in order to increase the contact area of the air with the air circulation surface.

Preferably, according to an embodiment of the present invention, the heating body 11 is made of alumina ceramic, aluminum nitride ceramic, silicon nitride ceramic, silicon carbide ceramic, beryllium oxide ceramic, or zirconium oxide ceramic.

The content of aluminum oxide in ceramics of aluminum oxide is more than 99%, and the density of ceramics of aluminum oxide is not less than 3.86 g/cm ³ .

More specifically, as an example, as shown in FIG. 2, the ceramic heater comprises a honeycomb heating body 11 made of alumina ceramic, a heating circuit 12, and a wire 13. At the same time, a porous channel 101 is located in the center of the honeycomb heating body 11, the porous channel 101 is made in the form of evenly spaced square holes; the heating circuit 12 surrounds and is located on the outer surface of the honeycomb heating body 11; the start end and the end end of the printed heating circuit 12 are provided with wires 13.

At the same time, the density of the alumina ceramic of which ^the heating body 11 is made is 3.9 g/cm and so on; the size of the square hole of the porous channel 101 may be 1.5 mm, that is, the side length of the square hole is 1.5 mm; the wall thickness of the porous channel 101 may be 0.2 mm (as shown in Fig. 2, the distance between the respective sides of two adjacent square holes is the wall thickness of the porous channel 101).

Further, the material of the heating circuit 12 is silver. Specifically, the printing thickness of the heating circuit 2 is 0.01-0.02 mm, the wire 13 may be a silver wire, its diameter is 0.2 mm.

In the exemplary embodiment of the present invention, the purity of the alumina honeycomb ceramic body of which the heating body 11 is made exceeds 99%, so that the surface density of the high-purity alumina honeycomb ceramic is very high, it can effectively prevent the adsorption of soot particles and protect against bad smell. . Honeycomb heating body, made of high purity aluminum oxide honeycomb ceramic, has good thermal conductivity, thermal conductivity coefficient up to 33W/m⋅K. The wall thickness and hole diameter of the honeycomb ceramic structure is very small, with good thermal conductivity. At the same time, the shape of the honeycomb porous structure can significantly increase the area of contact with air. Aluminum oxide honeycomb ceramic area is large, with high heating efficiency, help to complete the purpose of air heating faster. Thus, the honeycomb ceramic heater in the exemplary embodiment of the present invention is located under the smoking article to be heated and does not come into contact with the smoking article to be heated. When the user smokes a cigarette, air flows out of the hole of the honeycomb heater heated to a certain temperature, then hot air passes through the smoking article, quickly heats the smoking article to 320°C. This greatly increases the heating area and the heating efficiency of the smoking article, the heating is more uniform, the charring of the tobacco is more complete, the waste of tobacco is reduced, the feeling in the user's mouth is improved, and sufficient smoke is provided regardless of the type of smoking article. At the same time, due to the presence of a honeycomb porous structure, the air flow rate is limited to a certain extent, the contact time of hot air with a smoking article is longer, which slows down heat loss and saves energy. In the absence of puffing, the porous shape of the honeycomb ceramic can simultaneously block hot air, reduce the outlet of hot air, further save energy.

Based on the above, for the ceramic heater according to an embodiment of the present invention, the heating body is provided with a porous channel. Thus, when the heating circuit heats the air in the porous passage, it is possible to increase the contact area of the heating body with the air, make the surface area of the ceramic honeycomb body large, and complete heating of the air. This not only gives high heating efficiency, but because the ceramic heater body has good thermal conductivity, it can achieve the purpose of air heating faster. In addition, due to the porous structure of the channel, the air flow rate is limited to a certain extent, the contact time of hot air with the smoking article is longer, which slows down the heat loss, saves energy, also in the absence of puffing, the porous shape of honeycomb ceramics can simultaneously block hot air, reduce hot air flowing out, save energy even more. In addition, the surface density of the body of high purity ceramic heater is very high, it can effectively prevent the adsorption of soot particles and protect against bad smell.

As shown in FIG. 1, an object of the present invention is also a non-contact electronic cigarette heater that includes the ceramic heater 10 described above in the exemplary embodiment, the smoking article holder 20, and the shield tube 30.

Specifically, the cavity defined by the smoking article holder 20 is used to accommodate the smoking article, and the smoking article holder 20 also separates the smoking article from the ceramic heater 10.

Further, as an exemplary embodiment, the holder 20 of the smoking article comprises a ceramic tube 21 and a baffle 22, the cavity defined by the ceramic tube 21 being used to house the smoking article, the baffle 22 is connected to the ceramic tube 21 and adjacent to the ceramic heater 10 to separate the smoking article from the ceramic heater 10.

In particular, as shown in FIG. 1, fig. 3 and FIG. 5, the baffle 22 is a baffle, the baffle is located in a hole at one end of the ceramic tube 21 and forms a cup body together with the ceramic tube 21, and the baffle is provided with a plurality of guiding holes 202.

Further, as shown in FIG. 1 or fig. 3, the guide holes 202 are uniformly distributed along the circumferential direction.

More specifically, as an example, as shown in Figure 1 or Figure 3, the guide hole 202 is a round hole, and its diameter is also 0.1-2 mm.

Thus, when the ceramic heater 10 is heated, the baffle separates the ceramic heater 10 from the smoking article, this can effectively prevent the ceramic heater 10 from directly contacting the smoking article or being too close to it, thus preventing the part of the smoking article near the ceramic heater from burning. - for heating over 320°С. However, when the user smokes the smoking article, hot air can quickly enter the first cavity through the hot air flow through holes, namely the guide holes 202 for uniformly and rapidly heating the smoking article.

Additionally, in another embodiment, as shown in FIG. 6, the baffle 22 is a stepped surface projecting towards the center and extending along the preheat tube 21.

More specifically, as shown in Figure 6, there are two attachment plates 22, and two attachment plates 22 are oppositely arranged so that the ceramic heater 10 in the cavity can be effectively separated from the smoking article, this can effectively prevent the ceramic heater 10 from directly contacting the smoking article or its too close to it, thus preventing burning of the part of the smoking article next to the ceramic heater due to heating over 320°C. However, when the user smokes the smoking article, hot air can quickly enter through the gap between the two parts of the baffle to heat the smoking article evenly and quickly.

Further, according to an embodiment of the present invention, the ceramic tube 21 is made of alumina ceramic, aluminum nitride ceramic, silicon nitride ceramic, silicon carbide ceramic, beryllium oxide ceramic, or zirconium oxide ceramic.

Further, the deflector may also be made of alumina ceramic, aluminum nitride ceramic, silicon nitride ceramic, silicon carbide ceramic, beryllium oxide ceramic, or zirconium oxide ceramic.

The content of aluminum oxide in ceramics of aluminum oxide is more than 99%, and the density of ceramics of aluminum oxide is not less than 3.86 g/cm ³ .

In the exemplary embodiment of the present invention, the purity of the alumina ceramic exceeds 99%, so that the surface density of the high purity alumina honeycomb ceramic is very high, it can effectively prevent the adsorption of soot particles and prevent malodor, while the alumina ceramic has good thermal conductivity, thermal conductivity up to 33W/m⋅K, with high heating efficiency, help to achieve the purpose of air heating faster.

However, the alumina ceramic tube 21 is not used as a heater, which can reduce heat loss. At the same time, on the one hand, the through hole for hot air flow facilitates the circulation of hot air, on the other hand, the baffle prevents direct diffusion of hot air in the absence of a puff, and the effect of thermal insulation is achieved.

Based on in-depth study of the ceramic heater and smoking article holder 20, the present inventor has found that a modern conventional smoking article used in non-burning electronic cigarettes has a carbonization temperature of the cigarette paper wrapped around it that is lower than the temperature of inner tobacco. When the temperature of the cigarette paper wrapped around the smoking article exceeds 240° C., a burnt smell appears, and the inner tobacco must be heated at about 330° C. in order to efficiently release the smoke. It is necessary to solve the problem of heating tobacco to the ideal temperature without burning the cigarette paper. Further, through experimentation, the author has found that when puffing, the best user experience will be achieved if the entire smoking article is given an ideal cooking operating temperature, for example, 200-220°C.

Therefore, when using an electronic cigarette heater without direct contact of the smoking article with the ceramic heater, the smoking article holder 20 is required to provide a brewing temperature of 200-220°C. Therefore, the ceramic tube must have a preheating function. To prevent direct contact of the smoking article with the ceramic heater, a baffle should be placed at the bottom of the ceramic tube or in a restricted cavity to limit the position. After repeated experiments, it was found that the baffle can not only effectively isolate the smoking article from the ceramic heater, but also the tobacco tar deposit formed during the puffing of the smoking article will not condense on the ceramic heater and the baffle. Repeated smoking naturally produces a self-cleaning effect, prevents unpleasant odors from remaining, no frequent cleaning is required, and a high use value is achieved.

With regard to the heating effect, after many experiments, it has been found that the alumina ceramic tube can be used as a container of a smoking article, and not only effectively ensures the ideal cooking temperature of a smoking article due to the high thermal conductivity of the alumina material, but the dense material of the alumina ceramic tube does not allows tobacco tar to remain and helps to avoid the odor problem caused by continuous use.

Based on the above, according to another embodiment of the present invention, the ceramic tube 21 can also create a preheating effect, can preheat a smoking article, so it can be called a preheating tube.

Additionally, in order to obtain a better preheating effect, the wall of the preheating tube may also protrude axially outward relative to the baffle to accommodate at least a portion of the ceramic heater 10.

That is, the baffle 22 is located in the cavity formed by the ceramic tube 21 and divides the cavity into two parts, whereby one part is used to house the smoking article and the other part is used to house at least part of the ceramic heater 10.

More specifically, as shown in Figure 7, when the baffle 22 is a baffle, the baffle with many guide holes 202 is located in the cavity defined by the ceramic tube 21.

Thus, when the ceramic heater 10 is heated, because the baffle and the ceramic tube are made of high purity alumina ceramic, they can be quickly heated, provide cavity preheating effect, improve efficiency, ensure uniform heating of the smoking article.

In an embodiment of the present invention, as shown in FIG. 1, the shield tube 30 is hollow to accommodate the ceramic heater 10 and the smoking article holder 20.

The non-contact air-heating electronic cigarette heater according to an embodiment of the present invention heats air with a ceramic heater so that the heated air stream evenly heats a smoking article, avoids wasting tobacco in smoking articles, and can also increase the volume of smoke. However, due to the fact that the ceramic heater is made of high purity alumina ceramic, which has high density, almost no pores in microstructure, the contaminants in the liquid can not penetrate into them, can not leave dirt and bad smell on the surface. . Also, since the smoking article holder separates the smoking article from the ceramic heater, non-contact heating of the air is fully ensured, and the product is also protected from contamination. In addition, the ceramic heater has a porous structure, which makes the surface area of the ceramic honeycomb body large, ensuring that the air is fully heated. This not only gives high heating efficiency, but also, due to the fact that the ceramic heater body has good thermal conductivity, it can achieve the purpose of heating the air faster. Also, due to the structure of the porous channel, the air flow rate is limited to a certain extent, the contact time of hot air with the cigarette is increased, which slows down the loss of heat, saves energy, and in the absence of a puff, the porous shape of honeycomb ceramics can simultaneously block hot air, reduce the outflow of hot air air, even more save energy.

In addition, in order to increase the rate of temperature rise, the following heating strategy can be adopted: when heating with a controlled ceramic heater, high power can be used to increase at the initial stage, and after reaching the operating temperature, low power can be used to maintain the operating temperature.

Further, according to the exemplary embodiment of the present invention, the step of executing the heating circuit operating voltage lowering control according to the heating circuit operating time and the heating circuit operating current includes: determining whether the heating circuit operating current has reached a predetermined threshold value; if the operating current of the heating circuit has reached a predetermined threshold value, then according to the operating time of the heating circuit, a corresponding voltage reduction curve is obtained, and in accordance with the obtained voltage reduction curve, the operation voltage of the heating circuit is controlled to decrease.

More specifically, by way of example, the step of dividing the heating circuit run time into a plurality of time periods each corresponding to a declining curve and obtaining a corresponding declining curve according to the heating circuit running time includes: determining a time period for the heating circuit running time; obtaining an appropriate voltage reduction curve in accordance with the time period for the heating circuit operating time.

That is, each time the non-contact heater of electronic cigarettes is turned on, the initial temperature of the ceramic heater may be different, which leads to a different operating time of the heating circuit from the initial temperature to a certain operating temperature (that is, the heat balance temperature). In order to ensure heat balance, it is necessary to determine the appropriate voltage reduction curve depending on the heating circuit running time, in order to create an ideal puff effect, when the contactless electronic cigarette heater does not need to wait for food to cool, fully satisfies the need of users, and improves user experience.

However, due to the heat transfer process, the smoking article and the smoking article holder do not reach the appropriate temperature even if the ceramic heater reaches the operating temperature. Therefore, in order to maintain the operating temperature (that is, after the voltage is reduced), the ceramic heater is powered by low power, the voltage cannot be directly reduced to the voltage in the thermal insulation stage, but must be reduced slowly.

Therefore, when driving the ceramic heater to enter the thermal insulation stage, the execution of the voltage reduction process needs to be divided into several stages, for example, two-stage voltage reduction is required. The first stage requires a rapid decrease in voltage, the second stage requires a slow decrease in voltage to the corresponding voltage in the thermal insulation stage in order to enter the thermal insulation stage to maintain the operating temperature. This is due to the fact that for a rapid temperature increase, the power must be much higher than the heat balance power. If the voltage decrease is too slow, after the first puff, the user continues to smoke, this will easily cause the temperature of the smoking article to rise to 330°C, which will cause the smoking article to burn. Therefore, the control process of initially rapidly reducing the voltage and then slowly reducing the voltage effectively avoids this situation.

According to an exemplary embodiment of the present invention, when the heating circuit operating current reaches a predetermined current threshold, if the heating circuit operation time is greater than or equal to the predetermined time threshold, the heating circuit operating voltage is controlled to decrease using a multi-step reduction curve, in particular, the decrease rate voltage, corresponding to the multi-step voltage reduction curve, is successively reduced.

The use of multi-stage voltage reduction control, as well as the gradual decrease in the voltage reduction rate corresponding to the multi-stage voltage reduction curve, can effectively avoid the burning phenomenon of a smoking article, effectively maintain heat balance, ensure uniform and efficient heating of a smoking article, avoid wasting tobacco, and provide smoke volume.

As shown in FIG. 10, an object of the present invention is also a heating control device for a ceramic heater in a non-contact heater of electronic cigarettes, wherein the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, and a porous channel is located in the heating body; a heating circuit is located on the heating body to heat the air passing through the porous channel; the heating control device 900 includes a voltage control module 901, a time counting module 902, a current detection module 903.

The voltage control module 901 is used to control the heating circuit at the first operating voltage for heating when the contactless electronic cigarette heater is turned on; the time counting module 902 is used to count the running time of the heating circuit when the contactless heater of the electronic cigarettes is turned on; the current detection module 903 is used to monitor the operating current of the heating circuit. The voltage control unit 901 is also used to perform lowering control of the heating circuit operating voltage in accordance with the heating circuit running time and the operating current of the heating circuit.

As an exemplary embodiment, the voltage control unit 901 is also used to perform lowering control of the heating circuit operating voltage in accordance with the heating circuit running time and the operating current of the heating circuit.

Further, the current determination unit 903 is also used to determine whether the rate of change of the operating current of the heating circuit is within a predetermined range of the rate of change of the current; if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the interval of the rate of change of the current, then the operating voltage for controlling the heating circuit is reduced; if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the interval of the rate of change of the current, then the operating voltage for controlling the heating circuit is increased; if the rate of change of the operating current of the heating circuit is within the range of the rate of change of the current, then the operating voltage for controlling the heating circuit does not change.

That is, at the stage of heat balance, if the user's smoke volume per puff is large, then the rate of change of the heating circuit current is large, while in order to ensure heat balance, it is necessary to reduce the operating voltage of the heating circuit, for example, can be reduced by one division, can be reduced by one threshold voltage value (0.1V); if the user's smoke volume per puff is small, then the rate of change of the heating circuit current is small, while in order to ensure thermal balance, it is necessary to increase the operating voltage of the heating circuit, for example, it can be increased by one division, it is possible to increase one threshold voltage value (0.1V); if the user's smoke volume per puff is moderate, the heating circuit current change rate is within a predetermined current change rate range, and the operating voltage of the heating circuit need not be adjusted and kept unchanged.

Therefore, after the voltage reduction is completed, also in accordance with the rate of change of the operating current of the heating circuit, the operating voltage of the heating circuit is adaptively adjusted to achieve the amount of smoke required by the puffing habit of different groups of people and improve the user experience.

Additionally, as an exemplary embodiment, the voltage control module 901 is also used to determine whether the operating current of the heating circuit has reached a predetermined threshold value; if the operating current of the heating circuit has reached a predetermined threshold value, a corresponding voltage reduction curve is obtained according to the operation time of the heating circuit, and the operating voltage of the heating circuit is controlled to decrease in accordance with the obtained voltage reduction curve.

That is, when the contactless electronic cigarette heater is turned on, the voltage control unit 901 applies a first constant voltage to the heating circuit to increase the temperature rise rate using the increased power, while the time counting unit 902 counts the operation time of the heating circuit. Because the voltage is constant in the rapid heating stage and the resistance of the heating circuit increases with increasing temperature, the operating current of the heating circuit decreases with increasing temperature, and it is possible to reflect the operating temperature of the ceramic heater with the operating current of the heating circuit. After the ceramic heater reaches a certain operating temperature (i.e., heat balance temperature) in accordance with the heating circuit operating time and the heating circuit operating current, the heating circuit operating voltage lowering control is performed to achieve heat balance control.

More specifically, as an example, the voltage control module is used to divide the operation time of the heating circuit into several time periods, each time period corresponding to a voltage reduction curve. Specifically, the voltage control unit 901 determines the time period of the heating circuit operation time and obtains the corresponding voltage reduction curve in accordance with the heating circuit operation time.

That is, each time the non-contact heater of electronic cigarettes is turned on, the initial temperature of the ceramic heater may be different, which leads to a different operating time of the heating circuit from the initial temperature to a certain operating temperature (that is, the heat balance temperature). In order to ensure the heat balance, it is necessary to determine the appropriate voltage reduction curve according to the heating circuit running time, so as to obtain the ideal puff effect, which is that you can puff on the contactless electronic cigarette heater at any time without waiting for the products to cool, fully meet the needs of users, improve user experience. an experience.

Further, according to the exemplary embodiment of the present invention, the voltage control module 901 is also used to, if the running time of the heating circuit is greater than or equal to a predetermined threshold time, when the operating current of the heating circuit reaches the predetermined current threshold, to control the operating voltage of the heating circuit to decrease. using the multi-stage voltage reduction curve, in particular, the voltage reduction rate corresponding to the multi-stage voltage reduction curve is successively reduced.

However, due to the heat transfer process, the smoking article and the smoking article holder do not reach the appropriate temperature even if the ceramic heater reaches the operating temperature. Therefore, in order to maintain the operating temperature (that is, after the voltage is reduced), the ceramic heater is powered by low power, the voltage cannot be directly reduced to the voltage in the thermal insulation stage, but must be reduced slowly.

Therefore, when driving the ceramic heater to enter the thermal insulation stage, the execution of the voltage reduction process needs to be divided into several stages, for example, two-stage voltage reduction is required. The first stage requires a rapid decrease in voltage, the second stage requires a slow decrease in voltage to the corresponding voltage in the thermal insulation stage in order to enter the thermal insulation stage to maintain the operating temperature. This is due to the fact that for a rapid temperature increase, the power must be much higher than the heat balance power. If the voltage decrease is too slow, after the first puff, the user continues to smoke, this will easily cause the temperature of the smoking article to rise to 330°C, which will cause the smoking article to burn. Therefore, the control process of initially rapidly reducing the voltage and then slowly reducing the voltage effectively avoids this situation.

The use of multi-stage voltage reduction control, as well as the gradual decrease in the voltage reduction rate, corresponding to the multi-stage voltage reduction curve, can effectively avoid the burning phenomenon of a smoking article, effectively achieve heat balance, ensure uniform and efficient heating of a smoking article, avoid wasting tobacco, and ensure smoke volume.

Additionally, in an exemplary embodiment, a heating circuit in the form of a thick film circuit is printed on the outer surface of the heating body.

In particular, it should be noted that, in the embodiment of the present invention, it is possible to assign a predetermined current threshold and a predetermined time threshold independently of each other according to the actual situation of the product.

In the ceramic heater heating control apparatus of the non-contact electronic cigarette heater according to the embodiment of the present invention, due to the porous honeycomb structure, the heating body can provide sufficient heat capacity of the ceramic heater so that the temperature effect of the air flow on the heater when simulating the puffing process is small. In addition, the heating circuit has a clear temperature-sensing effect, so when the contactless electronic cigarette heater is turned on, the voltage control module first controls the heating circuit using the first operating voltage for heating, then, according to the heating circuit operating time and the heating circuit operating current, performs step-down control. operating voltage of the heating circuit, that is, by controlling the operating voltage of the heating circuit, the effect of heating the air required for puffing cigarettes can be obtained without dynamic power compensation based on the air flow sensor, and without temperature detection and control based on the temperature sensor. This not only reduces the complexity of the control system, but also gives a better control response effect. In addition, after the completion of the voltage reduction, also according to the rate of change of the operating current of the heating circuit, the operating voltage of the heating circuit is adaptively adjusted, and the amount of smoke required by the puffing habit of different groups of people can be provided, and the user experience can be improved.

Further, the subject of the present invention is also a contactless electronic cigarette heater including a ceramic heater heating control device in the contactless electronic cigarette heater.

The non-contact heater of electronic cigarettes according to an embodiment of the present invention using the above-described heating control device can achieve the necessary air heating effect for puffing cigarettes by controlling the operating voltage of the heating circuit without dynamic power compensation based on the air flow sensor, and without detecting and controlling temperature based on the sensor. temperature. This not only reduces the complexity of the control system, but also gives a better control response effect. In addition, it can also provide the amount of smoke required by the puffing habit of different groups of people, improve the user experience.

As shown in FIG. 1-4, an air-heating contactless electronic cigarette heater also shown as an embodiment of the present invention includes a heating element 1, a shield tube 30, and a heat recovery device 3, with a first honeycomb porous body located in the side wall of the heat recovery device 3. channel 31, the first honeycomb porous channel 31 separates the heat recovery device 3 into an outer wall 32 and an inner wall 33; a shielding tube 30 is located in the inner wall of the heat recovery device 3, a heating element 1 is inserted into the shielding tube 30, the heating element 1 is connected to the heat recovery device 3 by means of a shielding tube 3; in the heating element 1 is the heating body 11; on the heating body 11 there is a heating circuit 12, at the end of the heating circuit 12 there is a wire 13, in the heating body 11 there is a second honeycomb porous channel 101.

Further, the heating element 1 includes a preheating tube 21, a baffle 22, and a heater 20 arranged from top to bottom in order of enumeration. The baffle 22 has a plurality of guide holes 202.

Further, the heating element 1 and the heat recovery device 3 are made of high purity alumina ceramics, their density is not less than 3.86 g/cm ³ .

Further, the first honeycomb porous channel 31 and the second honeycomb porous channel 101 are evenly spaced quarter holes or other polygonal holes, the hole size range is from 0.1mm to 2mm, the minimum distance between two adjacent holes is from 0.1 to 0. 5 mm.

Further, the materials of the printed heating circuit 12 include, without limitation, silver, tungsten, MoMn (molybdenum-manganese).

Further materials of wire 13 include, but are not limited to, silver, copper, and nickel.

In the embodiment shown in FIG. 1, a first honeycomb porous channel 31 is located in the side wall of the heat recovery device 3. The first honeycomb porous channel 31 divides the heat recovery device 3 into an outer wall 32 and an inner wall 33. Inwardly, with respect to the inner wall 33 of the heat recovery device 3 a shielding tube 30 is located in the shielding tube 30, a heating element 1 is inserted into the shielding tube 30. The heating element 1 is connected to the heat energy recovery device 3 by means of the shielding tube 30; the heating element 1 comprises a preheating tube 21, a baffle 22 and a heating body 11 arranged from top to bottom in the order listed. As shown in FIG. 2, the heating element 1 has a heating circuit 12, a wire 13 is located at the end of the heating circuit 12, a second honeycomb porous channel 101 is located in the heating body 11. When a smoker wants to smoke, he inserts a smoking article (for example, a cartridge) into the tube 21 for pre- heating circuit to prevent the smoke projectile from falling, after the power is turned on, the heating circuit 2 begins to heat up to warm up the cartridge at 280°C-320°C, release active ingredients such as nicotine, and generate smoke for puffing, so it is necessary to preheat the device. After reaching a temperature of 200° C., the preheating tube 21 and the baffle 22 complete the preheating. After the completion of preheating in the first and second puffs, namely the first heating, the temperature of the cartridge is increased only from 200°C to 320°C, which is faster than the temperature rise from room temperature, and more smoke of the first and second puffs can also be provided. For fast heating, in the heating body 11 there is a second honeycomb porous channel 101, also this honeycomb porous channel is made in the form of evenly spaced square holes or polygonal holes. The hole size range is 0.1 to 2 mm, the minimum distance between two adjacent holes is 0.1 to 0.5 mm. The sweep area is large, so the air heating efficiency is very high. Also, the hot air passes through the center of the honeycombs and does not come into contact with the heating circuit 12 and does not cause pollution. Meanwhile, the heating element 1 and the heat recovery device 3 are made of high purity alumina ceramic, with good electrical insulation, high strength, and good thermal conductivity. Therefore, the heater 20 has no current leakage when heated, the preheating tube 21 and the baffle 22 also quickly raise temperatures due to the good thermal conductivity of the high purity alumina ceramic, and tobacco smoking is soon possible. When puffed, the air flow through the ceramic heater 20 is heated to a temperature of 320 ° C, and then passes through the guide holes 202 on the deflector 22 for further homogenization and flow separation, more uniform entry into the heated tobacco cartridge to increase the volume of smoke during heating. All the heat that does not act on the cartridge will be recovered because a shielding tube 30 is located in the inner wall 33 of the heat recovery device 3, and a heating element 1 is inserted into the shielding tube 30. The heat generated by the heating element 1 does not remain in the cartridge , is transmitted to the first honeycomb porous channel 31. This honeycomb porous channel is composed of evenly spaced square holes or other polygonal holes, the hole size range is from 0.1 to 2 mm, the minimum distance between two adjacent holes is from 0.1 to 0, 5 mm. The sweep area is large, so the air heating efficiency is very high, heat insulation also plays a role, and the heating time is reduced to save energy. When puffed, the heated air passes into the second honeycomb porous passage 101, and the air flows into the heat recovery device 3 and further removes heat from the first honeycomb porous passage 31 to perform heat recovery. The shield tube 30 acts as a seal between the heat recovery device 3 and the heating element 1 to prevent hot air from flowing to other places. During the puffing process, some liquid contaminants emitted by the cartridge inevitably remain in the device. Due to the fact that high purity alumina ceramic has a high density, its density is not less than 3.86g/ ^cm smell on the surface.

It should be understood that in the description of the present invention, the relationship of orientations or positions that indicate the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "forward , back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and others based on the accompanying figures are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the above described device or element must have a particular orientation and must be installed and operated in a particular orientation, should not be understood as limiting the present invention. .

In addition, the terms "first" and "second" are used for purposes of description only, and should not be understood as indicating or implying the relative importance or implicitly indicating the number of said technical characteristics. Thus, the characteristics that limit the "first" and "second" may explicitly or implicitly include one or more of these characteristics. In the description of the present invention, unless otherwise expressly limited, "several" means two or more.

In the present invention, unless otherwise clearly defined and limited, the terms "mounting", "installed", "connection" and so on should be understood in a broad sense, for example, "connection" can be understood as a permanent connection, can also be understood as a detachable connection or as a complete unit; can be understood as a mechanical connection, or can be understood as an electrical connection; can be understood as a direct connection, can also be understood as an indirect connection through an intermediate medium, can be understood as an internal connection between two components, or as an interaction relationship between two components. Ordinary technical personnel in this field can understand the specific meanings of the above terms in the present invention in accordance with specific situations.

In the present invention, unless otherwise clearly defined and limited, the first feature "above" or "under" the second feature may include direct contact between the first and second features, and may also include contact of other features between the first and second features without direct contact. Also, the first feature "above" the second feature, or on its upper side or on it, includes: the first feature is directly above the second feature and obliquely above it, or only indicates the height of the level of the first feature above the second feature. The first feature "below" the second feature, or on or on its underside, includes: the first feature is directly below the second feature and obliquely below it, or only indicates the first feature's level height is less than the second feature.

In this specification, the reference terms "one embodiment", "certain embodiments", "examples", "specific examples" or "some examples" and others mean the inclusion of specific features, structures, materials or features described based on this embodiment. or example, at least one embodiment or example of the present invention. In this description, the wording of the above terms is not to be understood as binding on the same embodiment. Moreover, it is possible to combine the described specific features, structures, materials or characteristics in any one or more embodiments or examples as appropriate. In addition, technical personnel in the art can combine and combine various embodiments or examples described in the formula.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments cannot be understood as limiting the present invention. Ordinary technical personnel in the art may change, amend, replace and modify the above embodiments.

Claims (36)

1. A method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, wherein the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, and a porous channel is located in the heating body; the heating circuit is located on the heating body to heat the air passing through the porous channel, the heating control method includes the following steps: when the contactless electronic cigarette heater is turned on, controlling the heating circuit using the first operating voltage for heating, determining the operating time of the heating circuit; determination of the operating current of the heating circuit; execution of the heating circuit operating voltage reduction control according to the heating circuit operating time and the heating circuit operating current, performing, after the completion of the voltage drop, adaptive adjustment of the heating circuit operating voltage in accordance with the rate of change of the heating circuit operating current, wherein performing adaptive adjustment of the heating circuit operating voltage in accordance with the rate of change of the heating circuit operating current includes: determining whether the rate of change of the operating current of the heating circuit is within a predetermined range of the rate of change of the current; if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the interval of the rate of change of current, then the operating voltage of the heating circuit is lowered; if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the interval of the rate of change of current, then the operating voltage of the heating circuit is increased; if the rate of change of the operating current of the heating circuit is within the range of the rate of change of the current, then the operating voltage of the heating circuit is left unchanged. 2. The method according to claim. 1, in which the control of lowering the operating voltage of the heating circuit in accordance with the operating time of the heating circuit and the operating current of the heating circuit includes: determining whether the operating current of the heating circuit reaches a predetermined threshold value; if the operating current of the heating circuit reaches a predetermined threshold value, performing the acquisition of a corresponding voltage-down curve according to the running time of the heating circuit, and controlling the reduction of the operating voltage of the heating circuit in accordance with the obtained voltage-down curve. 3. The method according to claim 2, including dividing the operating time of the heating circuit into several periods of time, each period of time corresponds to a voltage reduction curve, while obtaining a corresponding voltage reduction curve in accordance with the heating circuit operation time includes: determining a period of time for the operating time of the heating circuit; obtaining an appropriate voltage reduction curve in accordance with the time period for the heating circuit operating time. 4. The method according to claim 2, wherein when the operating current of the heating circuit reaches a predetermined current threshold, if the operating time of the heating circuit is greater than or equal to the predetermined threshold time, then the operating voltage of the heating circuit is controlled to decrease using a plurality of voltage reduction curves. , wherein the slew rate corresponding to the plurality of slew curves decreases sequentially. 5. A ceramic heater heating control device in a non-contact electronic cigarette heater, wherein the ceramic heater comprises a heating body and a heating circuit, the heating body is cylindrical, and a porous channel is located in the heating body; a heating circuit is located on the heating body to heat the air passing through the porous channel; the heating control device comprises a time counting module, a current detection module and a voltage control module, wherein the voltage control module is designed to control the heating circuit using the first operating voltage for heating when the contactless heater of electronic cigarettes is turned on; the time counting module is designed to count the heating circuit operation time when the non-contact heater of electronic cigarettes is turned on; the current detection module is designed to determine the operating current of the heating circuit; while the voltage control module is also designed to performing the heating circuit operating voltage lowering control according to the heating circuit operating time and the heating circuit operating current, after completion of the voltage reduction, adaptive adjustment of the operating voltage of the heating circuit in accordance with the rate of change of the operating current of the heating circuit, determining whether the rate of change of the operating current of the heating circuit is within a predetermined interval of the rate of change of the current; control the operating voltage of the heating circuit downwards, if the rate of change of the operating current of the heating circuit is greater than the value of the upper limit of the interval of the rate of change of current, controlling the operating voltage of the heating circuit upwards, if the rate of change of the operating current of the heating circuit is less than the value of the lower limit of the current change rate interval, controlling the operating voltage of the heating circuit to keep it unchanged if the rate of change of the operating current of the heating circuit is within the range of the current change rate. 6. The device according to claim 5, wherein the voltage control module is also designed to determining whether the operating current of the heating circuit reaches a predetermined threshold value; obtaining an appropriate voltage reduction curve according to the heating circuit running time; and controlling the heating circuit operating voltage to decrease according to the obtained voltage reduction curve if the heating circuit operation current has reached a predetermined threshold value. 7. Apparatus according to claim 6, wherein the voltage control module is also designed to divide the heating circuit operation time into several periods of time, each period of time corresponds to a voltage reduction curve, and to determine the period of time for the heating circuit operation time and obtain the corresponding reduction curve voltage according to the operating time of the heating circuit. 8. The device according to claim. 6, in which the voltage control module is also designed to, when the operating current of the heating circuit reaches a predetermined threshold current value, if the operating time of the heating circuit is greater than or equal to a predetermined threshold time value, to control the decrease in the operating voltage of the heating loop using a plurality of voltage reduction curves, wherein the voltage reduction rate corresponding to the plurality of voltage reduction curves is sequentially reduced. 9. Contactless heater of electronic cigarettes, which contains a device for controlling the heating of a ceramic heater in a contactless heater of electronic cigarettes according to any one of paragraphs. 5-8. 10. A computer-readable medium that stores a program for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes, the implementation of which performs a method for controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes according to any one of paragraphs. 1-4. 11. A computer device comprising a memory device, a processor, and a computer program stored in the memory device and capable of being executed on the processor, wherein when the processor executes the computer program, the method of controlling the heating of a ceramic heater in a non-contact heater of electronic cigarettes according to any one of paragraphs. 1-4. 12. The non-contact heater of electronic cigarettes, which contains a ceramic heater, the ceramic heater includes a heating body and a heating circuit, the heating body is cylindrical, a porous channel is located in the heating body; the heating circuit is located on the heating body to heat the air passing through the porous channel, the contactless electronic cigarette heater also includes a memory device, a processor and a computer program stored in the memory device and capable of being executed on the processor, wherein when the processor executes the computer program, a control method is executed heating a ceramic heater in a non-contact electronic cigarette heater according to any one of paragraphs. 1-4.

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