WO2019134456A1

WO2019134456A1 - Electronic cigarette automatic temperature control device, system and method, and electronic cigarette

Info

Publication number: WO2019134456A1
Application number: PCT/CN2018/116517
Authority: WO
Inventors: 刘德文
Original assignee: 威滔电子科技（深圳）有限公司
Priority date: 2018-01-08
Filing date: 2018-11-20
Publication date: 2019-07-11
Also published as: CN108107951A

Abstract

An electronic cigarette automatic temperature control device, system and method and an electronic cigarette, comprising: a heating sheet (1), a heating wire (10) being pasted on the heating sheet (1); a sampling circuit (2), which is electrically connected to the heating sheet (1) and is used to monitor in real time the resistance change of the heating wire (10) during the heating process of the heating wire (10) so as to generate a sampling signal; a controller (4) for receiving and generating a power regulation signal according to the sampling signal transmitted by the sampling circuit (2), the controller (4) comprising a storage, and the storage having a data table showing the correspondence relation between temperatures and resistances associated with the heating wire (10) stored therein; and a power-driven circuit (3), which is connected with the controller (4) and the sampling circuit (2) respectively and is used to receive and regulate, in the heating process of the heating sheet (1), the power of the heating wire (10) according to the power regulation signal, so as to regulate the temperature of the heating wire (10). The heating temperature of the electronic cigarette can be precisely controlled during the use of the electronic cigarette.

Description

Electronic cigarette automatic temperature control device, system and method, electronic cigarette

Technical field

The present invention relates to the field of electronic cigarettes, and more particularly to an electronic cigarette automatic temperature control device, system and method, and electronic cigarette.

Background technique

With the advancement of technology and the improvement of people's living standards, electronic cigarettes have gradually become a fashion technology product favored by the public.

At present, the common electronic cigarettes mainly cause the cigarettes or the smoke liquid to be ignited by heating the heating wires in the electronic cigarettes. In the current electronic cigarettes, since the actual temperature of the heating wires is not monitored in real time and automatically adjusted, often It is easy to cause the temperature to be too high, so that the cigarette or the smoke liquid is burned quickly, or the cigarette or the liquid smoke cannot be fully burned due to the low temperature, which affects the user's use, and also makes the electronic cigarette susceptible to temperature and burning. To shorten the service life of electronic cigarettes.

technical problem

The technical problem to be solved by the present invention is to provide an electronic cigarette automatic temperature control device, system and method, and electronic cigarette for the above-mentioned defects of the prior art.

Technical solution

The technical solution adopted by the present invention to solve the technical problem thereof is: constructing an automatic temperature control device for an electronic cigarette, comprising:

a heat generating sheet on which a heating wire for heating is attached;

a sampling circuit, the sampling circuit is electrically connected to the heating element, and is configured to monitor a resistance change of the heating wire in real time during heating of the heating wire to generate a sampling signal, and send the sampling signal to a controller Signal monitoring terminal;

The controller receives and generates a power adjustment signal according to the sampling signal sent by the sampling circuit, the controller includes a memory, the memory is built in the controller, and the memory stores the heat a data table corresponding to the temperature and resistance of the wire;

a power driving circuit, wherein the power driving circuit is respectively connected to the controller and the sampling circuit, and is configured to receive and adjust power of the heating wire according to the power adjustment signal during heating of the heat generating sheet to adjust The temperature of the heating wire.

Preferably, the method further comprises:

An amplifying circuit, the amplifying circuit is connected in series between the sampling circuit and the signal monitoring end of the controller, and is configured to perform amplification processing on the sampling signal and then send the signal to the controller;

The sampling circuit includes a sampling resistor, and the amplifying circuit includes a first input end, a second input end, and an output end;

a first end of the sampling resistor is connected to a positive end of the heating element, and a serial connection end of the first end of the sampling resistor and a positive end of the heating element is connected to a first input end of the amplifying circuit. A second end of the sampling resistor is coupled to a second input of the amplifying circuit, and an output of the amplifying circuit is coupled to a signal monitoring terminal of the controller.

Preferably, the power driving circuit includes a control MOS transistor, a gate of the control MOS transistor is connected to a power control end of the controller, and a source of the control MOS transistor is connected to a second end of the sampling resistor The drain of the control MOS transistor is connected to a power supply pin of the controller and is connected to a supply voltage.

Preferably, further comprising a battery;

A positive output terminal of the battery is coupled to a drain of the control MOS transistor and a power supply pin of the controller, respectively.

Preferably, a battery management module is further included, the battery management module being connected in parallel between the positive output terminal and the negative output terminal of the battery for managing and controlling charging of the battery.

Preferably, further comprising a vibration motor and a motor drive circuit coupled to the vibration motor;

a control end of the motor driving circuit is connected to a vibration enabling end of the controller, configured to receive and generate a driving signal according to a vibration signal output by the vibration enabling end of the controller, and send the driving signal To the vibration motor;

The vibration motor receives and generates a shock based on the drive signal.

Preferably, further comprising at least one LED indicator for indicating the power information/heating time information;

The signal ends of the LED indicators are respectively connected to signal pins corresponding to the controller.

The invention also provides an electronic cigarette comprising the above-mentioned electronic cigarette automatic temperature control device.

The invention also provides an electronic cigarette automatic temperature control system, comprising a central processing unit, a temperature measuring instrument connected to the central processing unit, and the above-mentioned electronic cigarette automatic temperature control device;

The thermometer is connected to the heating wire in the electronic cigarette automatic temperature control device for monitoring and reading the measured temperature of the heating wire in real time, and transmitting the measured temperature to the central processing unit;

The central processing unit receives and transmits the measured temperature to the electronic cigarette automatic temperature control device, and the electronic cigarette automatic temperature control device adjusts the temperature of the heating wire according to the measured temperature and the target temperature.

The invention also provides an electronic temperature automatic temperature control method, which is applied to the foregoing electronic cigarette automatic temperature control system, comprising the following steps:

In the production of electronic cigarettes:

A11. The controller receives and generates a power adjustment signal according to a target temperature sent by the central processing unit to adjust a temperature of the heating wire;

A12, the thermometer monitors and reads the real-time temperature of the heating wire in real time, obtains the measured temperature, and sends the measured temperature to the central processing unit;

A13. The central processing unit receives and transmits the measured temperature to the controller.

A14, the controller receives and determines whether the measured temperature is equal to the target temperature, if not, step A15; if yes, step A16;

A15, the controller adjusts the power adjustment signal to adjust the temperature of the heating wire until the measured temperature of the heating wire is equal to the target temperature, step A16;

A16. The central processing unit records the current measured temperature and the current resistance of the heating wire;

A17. Repeat steps A11-A16 at a plurality of different target temperatures to obtain a plurality of temperatures and resistance values corresponding to the heating wires;

A18: processing a plurality of temperature and resistance data corresponding to the heating wire to generate a temperature and resistance correspondence data table associated with the heating wire;

When using e-cigarettes:

B21. The controller controls the heating wire heating according to a target temperature output power adjustment signal;

B22, the sampling circuit monitors the resistance change of the heating wire in real time and generates a corresponding sampling signal, and sends the sampling signal to the signal monitoring end of the controller;

B23. The controller receives and processes the sampling signal to obtain a measured resistance value of the heating wire.

B24. The controller searches the measured resistance value in a temperature and resistance correspondence data table associated with the heating wire stored in the memory, and obtains a matching temperature corresponding to the measured resistance value;

B25, the controller determines whether the matching temperature is equal to the target temperature, and if so, step B26 is performed; if not, step B27 is performed;

B26. The controller maintains a current power adjustment signal, and controls the heating wire to maintain a current temperature.

B27. If the matching temperature is greater than the target temperature, the controller decreases the power adjustment signal to reduce a temperature of the heating wire; if the matching temperature is less than the target temperature, the controller improves the A power adjustment signal is provided to increase the temperature of the heating wire until the matching temperature is equal to the target temperature.

Beneficial effect

The electronic cigarette automatic temperature control device embodying the present invention has the following beneficial effects: the electronic cigarette automatic temperature control device of the present invention monitors the actual resistance change of the heating wire in real time by setting a sampling circuit, and based on the storage in the memory The only corresponding temperature and resistance data table of the heating wire generates corresponding power adjustment signal, automatically adjusts the actual temperature of the heating wire, and realizes precise control and adjustment of the actual temperature of the heating wire, so that the heating wire is in the heating process. Heating the cigarette according to the target temperature improves the stability of the heating temperature of the heating wire, enhances the safety and reliability of the electronic cigarette, and prolongs the service life of the electronic cigarette.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of an electronic cigarette automatic temperature control device according to an embodiment of the present invention;

2 is a schematic block diagram of an electronic cigarette automatic temperature control device according to an embodiment of the present invention;

3 is a schematic flow chart of an electronic cigarette automatic temperature control method in an electronic cigarette production process according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of an electronic cigarette automatic temperature control method according to an embodiment of the present invention when an electronic cigarette is used.

BEST MODE FOR CARRYING OUT THE INVENTION

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2, the electronic cigarette automatic temperature control device of the embodiment includes: a heating sheet 1, a sampling circuit 2, a controller 4, and a power driving circuit 3, wherein the heating sheet 1 is attached with a heating device. The heating wire 101; the sampling circuit 2 is electrically connected to the heating element 1 for monitoring the resistance change of the heating wire 101 in real time during heating of the heating wire 101 to generate a sampling signal, and transmitting the sampling signal to the signal monitoring end of the controller 4 The controller 4 receives and generates a power adjustment signal according to the sampling signal sent by the sampling circuit 2. The controller 4 includes a memory, the memory is built in the controller 4, and the temperature and the resistance value associated with the heating wire 101 are stored in the memory. The relation data table; the power driving circuit 3 is connected to the controller 4 and the sampling circuit 2, respectively, for receiving and adjusting the power of the heating wire 101 according to the power adjustment signal during the heating of the heat generating sheet 1 to adjust the temperature of the heating wire 101.

Optionally, the sampling circuit 2, the controller 4, and the power driving circuit 3 can all be disposed on a first surface of a PCB control board. One end of the PCB control board is fixedly connected to the heating sheet 1, and the other end of the PCB control board is charged. interface.

It can be understood that when the heating wire 101 on the heating sheet 1 starts to work, generally, the controller 4 outputs a corresponding power adjustment signal according to the preset target temperature to control the heating wire 101 to be heated according to the target temperature, and at the same time, by heating. A sampling circuit 2 is connected in series on the sheet 1. During the heating of the heating wire 101 on the heating sheet 1, the sampling circuit 2 monitors the actual resistance change of the heating wire 101 in real time, and converts the monitoring result into a corresponding sampling signal. The sampling signal is used to determine the resistance of the heating wire 101. The controller 4 is sent to the controller 4 by converting the real-time resistance change of the heating wire 101 during heating, and the controller 4 performs corresponding operation processing after receiving the sampling signal, and converts it into a corresponding measured resistance value (this The measured resistance is the current actual resistance value of the heating wire), and then according to the measured resistance value, the matching temperature corresponding to the measured resistance value is searched from the temperature and resistance correspondence data table stored in the memory, and then the matching temperature is matched. Comparing with the target temperature, if the matching temperature is equal to the target temperature, the current power adjustment signal is maintained, so that the heating wire 101 maintains the current temperature; if the matching temperature is greater than the target temperature, the power adjustment signal is correspondingly lowered to reduce the heating wire 101. If the matching temperature is lower than the target temperature, the power adjustment signal is accordingly increased to increase the heating temperature of the heating wire 101, and thus repeatedly monitored and adjusted until the matching temperature obtained according to the measured resistance value of the heating wire 101 is equal to the target temperature. Through the above control, precise control of the actual heating temperature of the heating wire 101 can be achieved, and the heating wire 101 is heated at the target temperature.

It should be noted that the temperature and resistance correspondence data table stored in the memory in the embodiment is associated with the heating wire 101 and uniquely corresponding, that is, the temperature and resistance correspondence data table reflects the heat generation. Correspondence between the temperature of the wire 101 and the resistance. Optionally, the temperature and resistance correspondence data table stored in the memory may be a corresponding temperature and resistance test when the heating wire 101 is produced, and the obtained data is processed to form the temperature and the resistance value. The correspondence data table is then stored in the memory. In some embodiments, the correspondence between temperature and resistance can also be made to be stored in a memory as a relationship curve.

Further, the electronic cigarette automatic temperature control device of the embodiment of the invention further includes:

The amplifying circuit 5 is connected in series between the sampling circuit 2 and the signal monitoring end of the controller 4 for amplifying the sampled signal and transmitting it to the controller 4.

The sampling circuit 2 includes a sampling resistor, and the amplifying circuit 5 includes a first input terminal, a second input terminal, and an output terminal.

The first end of the sampling resistor is connected to the positive end of the heating element 1, and the series connection end of the first end of the sampling resistor and the positive end of the heating element 1 is connected to the first input end of the amplifying circuit 5, and the second end of the sampling resistor is amplified The second input of the circuit 5 is connected, and the output of the amplifying circuit 5 is connected to the signal monitoring terminal of the controller 4.

It can be understood that, in the embodiment of the present invention, the sampling resistor is mainly used for real-time monitoring and sampling of the actual resistance value of the heating wire 101. Therefore, the selected sampling resistor has a small resistance value, generally much smaller than the resistance of the heating wire 101. The value, in turn, can achieve both signal monitoring and sampling purposes without adversely affecting the circuit.

Since the resistance of the sampling resistor is small, the generated sampling signal is small. Therefore, in the embodiment of the present invention, an amplifying circuit 5 is added between the signal monitoring end of the controller 4 and the sampling resistor, and the sampling is performed by the amplifying circuit 5. After the signal is amplified and processed, it is sent to the signal monitoring terminal of the controller 4, so that the sampling signal can be stably monitored by the controller 4, which improves the stability and accuracy of the signal transmission.

Alternatively, the amplifying circuit 5 may include an operational amplifier which is a high precision operational amplifier.

In the embodiment of the present invention, the power driving circuit 3 includes a control MOS tube, and the gate of the control MOS tube is connected with the power control end of the controller 4, and the source of the control MOS tube is connected with the second end of the sampling resistor, and the MOS tube is controlled. The drain is connected to the power supply pin of the controller 4 and is connected to the supply voltage. By controlling the heating time of the heating wire 101 by the sampling control MOS tube, the heating temperature of the heating wire 101 can be accurately controlled. The specific control principle is as follows: the controller 4 outputs a PWM power adjustment signal to the control end of the control MOS tube to control the conduction time of the MOS tube, that is, adjust the duty ratio of the control MOS tube, thereby changing the heating time of the heating wire 101. The purpose is to finally achieve control of the heating temperature of the heating wire 101.

Further, the electronic cigarette automatic temperature control device of the embodiment of the present invention may further include a battery 7 disposed on the second surface of the PCB control board. The battery 7 is mainly used to supply power to components disposed on the first side of the PCB control board. As shown in FIG. 2, the positive output terminals of the battery 7 are respectively connected to the drain of the control MOS transistor and the power supply pin of the controller 4. As can be seen from Fig. 2, the control MOS tube is turned on or off to control the operating state of the heating wire 101. For example, when the control MOS transistor is turned on, the supply voltage provided by the battery 7 can be controlled by the drain and the source of the MOS transistor, and then transmitted to the positive end of the heat generating sheet 1 via the sampling resistor, and the heating sheet 1 starts to heat; When the control MOS transistor is turned off, at this time, the drain and the source of the control MOS transistor are extremely disconnected, the power supply voltage cannot pass, and the heat generating sheet 1 stops heating.

Further, the electronic cigarette automatic temperature control device of the embodiment of the present invention may further include a battery management module 8 connected in parallel between the positive output end and the negative output end of the battery 7 for charging the battery 7. Management and control.

Alternatively, the battery management module 8 may include a charge management IC and a battery protection IC that can monitor and control the power and charge of the battery 7 in real time. For example, during the charging process, the charging management IC monitors the charging state of the battery 7 in real time. When the battery 7 is full, the charging management IC outputs a control signal to cut off the connection between the battery 7 and the external power source, so that the battery 7 automatically turns off charging, avoiding the battery 7 Overcharge and damage the battery 7. A battery protection IC can be used to manage and protect the battery 7.

In the embodiment of the present invention, the electronic cigarette automatic temperature control device may further include: a vibration motor 11 and a motor drive circuit 10 connected to the vibration motor 11. The control end of the motor drive circuit 10 is connected to the vibration enable end of the controller 4, and is configured to receive and generate a drive signal according to the vibration signal outputted by the vibration enable end of the controller 4, and send the drive signal to the vibration motor. 11; the vibration motor 11 receives and generates vibration according to the drive signal.

During use, when the heating wire 101 is heated to start smoking, the controller 4 outputs a vibration signal to the motor driving circuit 10, and the motor driving circuit 10 is turned on and generates a driving signal to drive the vibration motor 11 to generate vibration, prompting the user. You can start smoking.

Optionally, the motor driving circuit 10 of the embodiment of the present invention may include a driving MOS tube, and the driving state of the vibration motor 11 can be controlled by the driving MOS tube.

In the embodiment of the present invention, the electronic cigarette automatic temperature control device may further include: at least one LED indicator light 6. Wherein at least the LED indicator 6 is disposed on the first side of the PCB control board, the LED indicator 6 for indicating the power information/heating time information; and the signal end of the LED indicator 6 is respectively corresponding to the signal of the controller 4. When the plurality of LED indicators 6 are used, the signal terminals of each of the LED indicators 6 are respectively connected to the signal pins corresponding to the controller 4.

Optionally, the LED indicator 6 of the embodiment may include four LED indicators 6 that may indicate the power signal of the battery or the heating time information of the heating wire 101. For example, during the heating process of the heating wire 101, the four LED lights automatically perform the lighting action according to the indication signal output by the controller 4, for example, when the heating time reaches half of the preset heating time, the two LED lights are illuminated; when heating When the time reaches the preset heating time, the four LED lights are all on. Or when the power indicator is received, when the power indicator signal is received, the corresponding lighting indicator is performed according to the power indicator signal. For example, if the battery remaining 50%, 2 LED lights are on, and when the battery remaining 75%, 3 LED lights are on. When the power is still 100%, the 4 LED lights are all on. Here, the heating time information indicates that the heating wire 101 is executed during heating, and the electric quantity indication is performed when the heating wire 101 stops heating.

Further, the electronic cigarette automatic temperature control device of the embodiment of the present invention may further include: a button switch 9 disposed on the first surface of the PCB control board, the button switch 9 being configured to trigger the opening of the electronic cigarette automatic temperature control device and the power indicator Wait. For example, when the user presses the button switch 9 shortly, the LED light displays the power; during long press (for example, long press for 3 seconds), the heating wire 101 starts to heat; if the heating wire 101 is heated, if it wants to manually control the stop The heating wire 101 is heated, and can be pressed long (for example, for 3 seconds), and the heating wire 101 stops heating.

The electronic cigarette automatic temperature control device of the present invention monitors the actual resistance change of the heating wire 101 in real time by setting the sampling circuit 2, and based on the temperature and resistance correspondence data table uniquely corresponding to the heating wire 101 stored in the memory. The corresponding power adjustment signal is generated, and the actual temperature of the heating wire 101 is automatically adjusted, so that the precise control and adjustment of the actual temperature of the heating wire 101 is realized, so that the heating wire 101 heats the cigarette according to the target temperature during the heating process, thereby improving The heating temperature of the heating wire 101 is stable, the safety and reliability of the electronic cigarette are enhanced, and the service life of the electronic cigarette is prolonged.

The invention also provides an electronic cigarette comprising the aforementioned electronic cigarette automatic temperature control device.

The invention also provides an electronic cigarette automatic temperature control system, comprising a central processing unit, a temperature measuring instrument connected to the central processing unit, and the aforementioned electronic cigarette automatic temperature control device.

The thermometer is connected to the heating wire 101 in the automatic temperature control device of the electronic cigarette, and is used for real-time monitoring and reading the measured temperature of the heating wire 101, and transmitting the measured temperature to the central processing unit;

The central processing unit receives and transmits the measured temperature to the electronic cigarette automatic temperature control device, and the electronic cigarette automatic temperature control device adjusts the temperature of the heating wire 101 according to the measured temperature and the target temperature.

Specifically, in the production of the electronic cigarette (ie, before leaving the factory), the external temperature meter is connected to the heating wire 101 in the automatic temperature control device of the electronic cigarette, and the heating wire 101 is monitored and read in real time during the heating process at the target temperature. The measured temperature of the heating wire 101 is sent to the central processing unit. The central processing unit receives and transmits the measured temperature to the controller 4 of the electronic cigarette automatic temperature control device, and the controller 4 determines whether the measured temperature is equal to the target temperature, and if the measured temperature is equal to the target temperature, maintaining the current output power by the central processing unit Recording the current temperature of the heating wire 101 and the current resistance value and storing it in the memory; if the measured temperature is greater than the target temperature, the controller 4 lowers the power adjustment signal to reduce the output power, thereby reducing the heating temperature of the heating wire 101; When the temperature is lower than the target temperature, the controller 4 increases the power adjustment signal to increase the output power, thereby increasing the heating temperature of the heating wire 101, until the measured temperature is equal to the target temperature, maintaining the current output power, and recording the current heating wire 101 by the central processing unit. The temperature and the corresponding resistance value are stored in the memory; the plurality of different temperature target values of the heating wire 101 and the corresponding resistance value of the heating wire 101 are repeatedly tested to generate a unique temperature and resistance associated with the heating wire 101. Corresponding relational data table or relationship curve, the central processing unit compares the relationship data The table or relationship curve is assigned to the controller 4 and stored in the internal memory of the controller 4.

It can be understood that, in the production process of the electronic cigarette according to the embodiment of the present invention, each of the heating wires 101 is subjected to the above test, and the temperature and resistance correspondence data table or relationship curve stored in the memory inside the controller 4 is used. It is uniquely corresponding to the corresponding heating wire 101.

When the electronic cigarette is used, specifically, when the heating wire 101 on the heating sheet 1 in the electronic cigarette starts to work, generally, the controller 4 outputs a corresponding power adjustment signal to control the heating wire 101 according to the preset target temperature. The target temperature is heated, and at the same time, a sampling circuit 2 is connected in series on the heating sheet 1, and the actual resistance change of the heating wire 101 is monitored in real time during heating of the heating wire 101 on the heating sheet 1, and the monitoring result is converted. For the corresponding sampling signal, the sampling signal is used to determine the resistance of the heating wire 101. The controller 4 converts the real-time resistance change of the heating wire 101 into a corresponding sampling signal and sends it to the controller 4, and after receiving the sampling signal, the controller 4 performs corresponding operation processing and converts it into a corresponding measured resistance value. And searching the matching temperature corresponding to the measured resistance value from the temperature and resistance correspondence data table stored in the memory according to the measured resistance value, and then comparing the matching temperature with the target temperature, if the matching temperature is equal to the target Maintaining a current power adjustment signal to maintain the current temperature of the heating wire 101; if the matching temperature is greater than the target temperature, lowering the power adjustment signal to reduce the heating temperature of the heating wire 101; if the matching temperature is lower than the target temperature, Accordingly, the power adjustment signal is increased to increase the heating temperature of the heating wire 101, and thus repeatedly monitored and adjusted until the matching temperature obtained according to the measured resistance of the heating wire 101 is equal to the target temperature. Through the above control, precise control of the actual heating temperature of the heating wire 101 can be achieved, and the heating wire 101 is heated at the target temperature.

The invention also provides an automatic temperature control method for an electronic cigarette, and the electronic cigarette automatic temperature control method of the embodiment of the invention can be realized by the above-mentioned electronic cigarette automatic temperature control system. FIG. 3 is a schematic flow chart of an electronic cigarette automatic temperature control method in an electronic cigarette production process according to an embodiment of the present invention.

In the electronic cigarette production, an electronic cigarette automatic temperature control method of the embodiment includes the following steps:

A11. The controller 4 receives and generates a power adjustment signal according to the target temperature sent by the central processing unit to adjust the temperature of the heating wire 101.

A12. The thermometer monitors and reads the real-time temperature of the heating wire 101 in real time, obtains the measured temperature, and sends the measured temperature to the central processing unit.

A13. The central processing unit receives and transmits the measured temperature to the controller 4.

A14. The controller 4 receives and determines whether the measured temperature is equal to the target temperature. If not, step A15 is performed; if yes, step A16 is performed.

A15. The controller 4 adjusts the power adjustment signal to adjust the temperature of the heating wire 101 until the measured temperature of the heating wire 101 is equal to the target temperature, and step A16 is performed.

A16. The central processing unit records the current measured temperature and the current resistance of the heating wire 101.

A17. Repeat steps A11-A16 at a plurality of different target temperatures to obtain a plurality of temperatures and resistance values corresponding to the heating wire 101.

A18. The data of the plurality of temperatures and resistance values corresponding to the heating wire 101 are processed to generate a temperature and resistance correspondence data table associated with the heating wire 101.

In some embodiments, the correspondence between the temperature and the resistance value associated with the heating wire 101 can be processed to generate a temperature versus resistance relationship curve.

When the electronic cigarette is used, as shown in FIG. 4, an automatic electronic cigarette temperature control method of the embodiment includes the following steps:

B21. The controller 4 controls the heating of the heating wire 101 according to the target temperature output power adjustment signal.

B22. The sampling circuit 2 monitors the resistance change of the heating wire 101 in real time and generates a corresponding sampling signal, and simultaneously sends the sampling signal to the signal monitoring end of the controller 4.

B23. The controller 4 receives and processes the sampling signal to obtain the measured resistance value of the heating wire 101.

B24. The controller 4 searches the measured resistance value in the temperature and resistance correspondence data table associated with the heating wire 101 stored in the memory, and obtains a matching temperature corresponding to the measured resistance value.

B25. The controller 4 determines whether the matching temperature is equal to the target temperature. If yes, step B26 is performed; if not, step B27 is performed.

B26. The controller 4 maintains the current power adjustment signal and controls the heating wire 101 to maintain the current temperature.

B27. If the matching temperature is greater than the target temperature, the controller 4 reduces the power adjustment signal to reduce the temperature of the heating wire 101; if the matching temperature is lower than the target temperature, the controller 4 increases the power adjustment signal to increase the temperature of the heating wire 101 until the matching The temperature is equal to the target temperature.

By adopting the electronic cigarette automatic temperature control method according to the embodiment of the present invention, the actual heating of the heating wire can be accurately and automatically controlled according to the temperature and resistance relationship data table associated with the heating wire embedded in the memory in the controller 4. The temperature realizes the precise control and adjustment of the actual heating temperature of the heating wire, so that the heating wire heats the cigarette according to the target temperature during the heating process, improves the stability of the heating temperature of the heating wire, and enhances the safety of the electronic cigarette. And reliability, extending the life of the electronic cigarette.

The above embodiments are merely illustrative of the technical concept and the features of the present invention. The purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention without limiting the scope of the present invention. Equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the appended claims.

It is to be understood that those skilled in the art will be able to make modifications and changes in accordance with the above description, and all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

An electronic cigarette automatic temperature control device, comprising:

a heat generating sheet on which a heating wire for heating is attached;

a sampling circuit, the sampling circuit is electrically connected to the heating element, and is configured to monitor a resistance change of the heating wire in real time during heating of the heating wire to generate a sampling signal, and send the sampling signal to a controller Signal monitoring terminal;

The controller receives and generates a power adjustment signal according to the sampling signal sent by the sampling circuit, the controller includes a memory, the memory is built in the controller, and the memory stores the heat a data table corresponding to the temperature and resistance of the wire;

a power driving circuit, wherein the power driving circuit is respectively connected to the controller and the sampling circuit, and is configured to receive and adjust power of the heating wire according to the power adjustment signal during heating of the heat generating sheet to adjust The temperature of the heating wire.
The electronic cigarette automatic temperature control device according to claim 1, further comprising:

An amplifying circuit, the amplifying circuit is connected in series between the sampling circuit and the signal monitoring end of the controller, and is configured to perform amplification processing on the sampling signal and then send the signal to the controller;

The sampling circuit includes a sampling resistor, and the amplifying circuit includes a first input end, a second input end, and an output end;

a first end of the sampling resistor is connected to a positive end of the heating element, and a serial connection end of the first end of the sampling resistor and a positive end of the heating element is connected to a first input end of the amplifying circuit. A second end of the sampling resistor is coupled to a second input of the amplifying circuit, and an output of the amplifying circuit is coupled to a signal monitoring terminal of the controller.
The electronic cigarette automatic temperature control device according to claim 2, wherein the power driving circuit comprises a control MOS transistor, and a gate of the control MOS transistor is connected to a power control terminal of the controller, the control A source of the MOS transistor is connected to the second end of the sampling resistor, and a drain of the control MOS transistor is connected to a power supply pin of the controller and is connected to a supply voltage.
The electronic cigarette automatic temperature control device according to claim 3, further comprising a battery;

A positive output terminal of the battery is coupled to a drain of the control MOS transistor and a power supply pin of the controller, respectively.
The electronic cigarette automatic temperature control device according to claim 4, further comprising a battery management module, wherein the battery management module is connected in parallel between the positive output terminal and the negative output terminal of the battery, Battery charging is managed and controlled.
The electronic cigarette automatic temperature control device according to claim 5, further comprising a vibration motor and a motor driving circuit connected to the vibration motor;

a control end of the motor driving circuit is connected to a vibration enabling end of the controller, configured to receive and generate a driving signal according to a vibration signal output by the vibration enabling end of the controller, and send the driving signal To the vibration motor;

The vibration motor receives and generates a shock based on the drive signal.
The electronic cigarette automatic temperature control device according to claim 1, further comprising at least one LED indicator for indicating power amount information/heating time information;

The signal ends of the LED indicators are respectively connected to signal pins corresponding to the controller.
An electronic cigarette comprising the electronic cigarette automatic temperature control device according to any one of claims 1-7.
An electronic cigarette automatic temperature control system, comprising: a central processing unit, a temperature measuring instrument connected to the central processing unit; and the electronic cigarette automatic temperature control device according to any one of claims 1-7;

The thermometer is connected to the heating wire in the electronic cigarette automatic temperature control device for monitoring and reading the measured temperature of the heating wire in real time, and transmitting the measured temperature to the central processing unit;

The central processing unit receives and transmits the measured temperature to the electronic cigarette automatic temperature control device, and the electronic cigarette automatic temperature control device adjusts the temperature of the heating wire according to the measured temperature and the target temperature.
An electronic cigarette automatic temperature control method is applied to the electronic cigarette automatic temperature control system according to claim 9, characterized in that it comprises the following steps:

In the production of electronic cigarettes:

A11. The controller receives and generates a power adjustment signal according to a target temperature sent by the central processing unit to adjust a temperature of the heating wire;

A12, the thermometer monitors and reads the real-time temperature of the heating wire in real time, obtains the measured temperature, and sends the measured temperature to the central processing unit;

A13. The central processing unit receives and transmits the measured temperature to the controller.

A14, the controller receives and determines whether the measured temperature is equal to the target temperature, if not, step A15; if yes, step A16;

A15, the controller adjusts the power adjustment signal to adjust the temperature of the heating wire until the measured temperature of the heating wire is equal to the target temperature, step A 16;

A16. The central processing unit records the current measured temperature and the current resistance of the heating wire;

A17. Repeat step A11- at multiple different target temperatures. A16, obtaining a plurality of temperatures and resistance values corresponding to the heating wire;

A18: processing a plurality of temperature and resistance data corresponding to the heating wire to generate a temperature and resistance correspondence data table associated with the heating wire;

When using e-cigarettes:

B21. The controller controls the heating wire heating according to a target temperature output power adjustment signal;

B22, the sampling circuit monitors the resistance change of the heating wire in real time and generates a corresponding sampling signal, and sends the sampling signal to the signal monitoring end of the controller;

B23. The controller receives and processes the sampling signal to obtain a measured resistance value of the heating wire.

B24. The controller searches the measured resistance value in a temperature and resistance correspondence data table associated with the heating wire stored in the memory, and obtains a matching temperature corresponding to the measured resistance value;

B25, the controller determines whether the matching temperature is equal to the target temperature, and if so, step B26 is performed; if not, step B27 is performed;

B26. The controller maintains a current power adjustment signal, and controls the heating wire to maintain a current temperature.

B27. If the matching temperature is greater than the target temperature, the controller decreases the power adjustment signal to reduce a temperature of the heating wire; if the matching temperature is less than the target temperature, the controller improves the A power adjustment signal is provided to increase the temperature of the heating wire until the matching temperature is equal to the target temperature.