WO2016201911A1 - Système de régulation de température pour élément de chauffage de cigarette électronique - Google Patents

Système de régulation de température pour élément de chauffage de cigarette électronique Download PDF

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Publication number
WO2016201911A1
WO2016201911A1 PCT/CN2015/096043 CN2015096043W WO2016201911A1 WO 2016201911 A1 WO2016201911 A1 WO 2016201911A1 CN 2015096043 W CN2015096043 W CN 2015096043W WO 2016201911 A1 WO2016201911 A1 WO 2016201911A1
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Prior art keywords
capacitor
resistor
chip
module
leg
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PCT/CN2015/096043
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English (en)
Chinese (zh)
Inventor
周学武
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深圳葆威道科技有限公司
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Publication of WO2016201911A1 publication Critical patent/WO2016201911A1/fr

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes

Definitions

  • the invention belongs to the field of electronic technology, and in particular relates to a temperature control system for an electronic cigarette heating element.
  • the current electronic cigarette heating control method is in power regulation or NTC control regulation.
  • the power adjustment causes the temperature to be not constant, and the hot mouth temperature is high and low, which may cause burnt smell.
  • NTC temperature control if the NTC is placed on the nebulizer, the complexity and compatibility of the nebulizer and the battery case connection will be caused. For example, the detection on the control board or other power devices will cause the actual temperature and The detection temperature is inaccurate and the error is large.
  • the electronic cigarette heating element temperature control technology the heating temperature changes to cause a change in the resistance value of the heating element, and the system determines the temperature monitoring by detecting the resistance value.
  • the invention is realized by the method, the temperature control system of the electronic cigarette heating body, the temperature control system comprises a central processing unit MCU, a display module, a power management module, a power supply module, a battery anti-reverse module, a voltage detection module, a heating module, a heating detection AD feedback module and a key input module, wherein an output end of the heating detection AD feedback module is connected to an input end of the central processing unit MCU, and an output end of the central processing unit MCU is connected to the heating module
  • the input end of the central processing unit MCU is connected to the input end of the display module, the key input mode
  • the output end of the block is connected to the input end of the central processing unit MCU, the power supply module is electrically connected to the power management module, and the power management module is connected to the central processing unit MCU for bidirectional communication, and the voltage detecting module
  • the output end is connected to the input end of the central processing unit MCU, the input end of the voltage detecting module is connected to the output end of the power supply module
  • the power management module includes a capacitor C20, a resistor R12, a chip U5, a resistor R15, a capacitor C19, and a terminal P4.
  • the first leg of the terminal P4 is connected to the anode and the chip of the capacitor C19.
  • the seventh leg of the chip U5 is connected to one end of the resistor R11
  • the second leg of the chip U5 is grounded to the resistor R12
  • the fifth leg of the chip U5 is connected to the positive electrode of the capacitor C20.
  • the negative electrode of the capacitor C20 is connected to the first leg of the chip U5 and to the ground.
  • the third and sixth legs of the chip U5, the negative pole of the capacitor C19, and the fourth and fifth legs of the connected terminal P4 are grounded.
  • the battery anti-reverse connection module includes a resistor R14, a resistor R13, a MOS transistor Q3, a MOS transistor Q4, and a terminal P5, and a gate of the MOS transistor Q4 is connected to one end of the resistor R14.
  • the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q3 and the second pin of the terminal P5, the gate of the MOS transistor Q3 is connected to one end of the resistor R13, the other end of the resistor R13, and the resistor R14 are The other end and the first leg of the terminal P5 are respectively connected to the fifth leg of the chip U5, and the source of the MOS transistor is grounded.
  • the power supply module includes a first power supply unit that supplies power to the display module and a second power supply unit that supplies power to the central processing unit, and the structure of the first power supply unit and the second power supply unit Similarly, the first power supply unit includes a capacitor C7, a capacitor C8, a chip U2, a capacitor C9, a capacitor C10, and an inductor L1.
  • the Vin pin of the chip U2 is respectively connected to the anode of the capacitor C7 and one end of the capacitor C8.
  • the Vout pin of the chip U2 is respectively connected to one end of the capacitor C9, the anode of the capacitor C10, and one end of the inductor L.
  • the second power supply unit includes a capacitor C11, a capacitor C12, a chip U3, a capacitor C13, a capacitor C14, and an inductor L2.
  • the Vin pin of the chip U3 is respectively connected to the anode of the capacitor C11 and one end of the capacitor C12.
  • the Vout pin of the chip U3 is connected to one end of the capacitor C13, the anode of the capacitor C14, and one end of the inductor L.
  • the cathode of the capacitor C11, the other end of the capacitor C12, the GND pin of the chip U3, and the end of the capacitor C13 are respectively connected. Negative capacitor C14 are grounded.
  • the display module includes a chip U1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, and a resistor R1.
  • the 29th pin of the chip U1 passes through the capacitor C6. Grounding, the 28th pin of the chip U1 is grounded via the capacitor C8, the 27th leg of the chip U1 is grounded via the resistor R1, and the 9th pin of the chip U1 is grounded via the capacitor C3, and the chip U1 is The sixth pin is grounded via the capacitor C4.
  • the fourth pin of the chip U1 connects the capacitor C2 to the fifth pin of the chip U1, and the second pin of the chip U1 connects the capacitor C1 to the chip U1. In the third leg, the 8th, 11th, 12th, 16th, 17th, and 20th-25th legs of the chip U1 are grounded.
  • the central processing unit MCU includes a chip U4, a capacitor C15, a capacitor C16, a switch SW1, and a switch SW2.
  • the seventh and eighth pins of the chip U4 are grounded via the capacitor C15, respectively.
  • the 13th pin of the chip U4 is grounded via the capacitor C16, the 19th leg of the chip U4 is connected to one end of the switch SW1, and the 20th leg of the chip U4 is connected to one end of the switch SW2, the chip U4
  • the 18th and 10th feet are grounded.
  • the heating detection AD feedback module includes a resistor R10, a transistor Q1, a resistor R9, a MOS transistor Q2, a resistor R7, a resistor R8 terminal P3, and a capacitor C18, and one end of the resistor R10 is connected
  • the base of the transistor Q1 the collector of the transistor Q1 is connected to the gate of the MOS transistor Q2 and one end of the resistor R9, and the drain of the MOS transistor is connected to the first leg of the terminal P3, the terminal
  • the second leg of P3 is respectively one end of the resistor R7 and one end of the resistor R8.
  • the other end of the resistor R8 is grounded via a capacitor C18, and the other end of the resistor R7 and the emitter of the transistor Q1 are grounded.
  • the heat generating module includes a resistor Rt.
  • the key input module includes a resistor R2, a resistor R3, a resistor R4, a button S1, a button S2, and a button S3.
  • One end of the resistor R2 is connected to one end of the button S1, and the resistor R3
  • One end of the button S2 is connected to one end of the button S2, and the other end of the button S1, the other end of the button S2, and the other end of the button S3 are grounded.
  • the voltage detecting module block includes a resistor R5, a resistor R6, and a capacitor C17.
  • One end of the resistor R5 is respectively connected to one end of the resistor R6 and one end of the capacitor C17, and the resistor R6 is The other end and the other end of the capacitor C17 are grounded.
  • the invention has the advantages that the utility model has the advantages of simple structure, convenient use, low cost, more accurate detection, more convenient control and effective implementation of the overall stability and coordination of the system. Built-in boost, improve communication speed and stable operation.
  • FIG. 1 is a block diagram showing the structure of a temperature control system for an electronic cigarette heating element according to an embodiment of the present invention
  • FIG. 2 is an electrical schematic diagram of a power supply module according to an embodiment of the present invention.
  • FIG. 3 is an electrical schematic diagram of a power management module and a battery anti-reverse module according to an embodiment of the present invention
  • FIG. 4 is an electrical schematic diagram of a display module according to an embodiment of the present invention.
  • FIG. 5 is an electrical schematic diagram of a central processing unit according to an embodiment of the present invention.
  • FIG. 6 is an electrical schematic diagram of a heating detection AD feedback module according to an embodiment of the present invention.
  • FIG. 7 is an electrical schematic diagram of a key input module according to an embodiment of the present invention.
  • FIG. 8 is an electrical schematic diagram of a voltage detecting module according to an embodiment of the present invention.
  • control data temperature target temperature of 180 degrees corresponding to a data point according to an embodiment of the present invention
  • FIG. 11 is a flowchart of controlling a PID control software according to an embodiment of the present invention.
  • the temperature control system includes a central processing unit MCU, a display module, a power management module, a power supply module, a battery anti-reverse module, and a voltage detection module.
  • Heating module, heating detection AD feedback module and button input In the module, the output of the heating detection AD feedback module is connected to the input end of the central processing unit MCU, and the output end of the central processing unit MCU is connected to the input end of the heating module, the central processing unit MCU The output end is connected to the input end of the display module, the output end of the key input module is connected to the input end of the central processing unit MCU, the power supply module is electrically connected to the power management module, and the power management module is connected.
  • the central processing unit MCU communicates bidirectionally, the output end of the voltage detecting module is connected to the input end of the central processing unit MCU, and the input end of the voltage detecting module is connected to the output end of the power supply module, An input end of the battery anti-reverse module is connected to the power supply module, and an output end of the battery anti-reverse module is connected to an input end of the central processing unit MCU, wherein the power supply module is electrically connected to the display module and Central Processing Unit MCU.
  • the power management module includes a capacitor C20, a resistor R12, a chip U5, a resistor R15, a capacitor C19, and a terminal P4.
  • the first leg of the terminal P4 is connected to the anode of the capacitor C19 and the fourth and eighth pins of the chip U5.
  • the seventh leg of the chip U5 is connected to one end of the resistor R11, the second leg of the chip U5 is grounded to the resistor R12, the fifth leg of the chip U5 is connected to the positive pole of the capacitor C20, and the negative terminal of the capacitor C20 is connected.
  • the first leg and the ground of the chip U5, the third and sixth legs of the chip U5, the negative pole of the capacitor C19, and the fourth and fifth legs of the connected terminal P4 are grounded.
  • the battery anti-reverse module includes a resistor R14, a resistor R13, a MOS transistor Q3, a MOS transistor Q4, and a terminal P5.
  • the gate of the MOS transistor Q4 is connected to one end of the resistor R14, and the drain of the MOS transistor Q4.
  • Connect the drain of the MOS transistor Q3 and the second leg of the terminal P5, the gate of the MOS transistor Q3 is connected to one end of the resistor R13, the other end of the resistor R13, the other end of the resistor R14, and the terminal P5. 1 leg is respectively connected to the 5th pin of the chip U5, the MOS tube The source is grounded.
  • the power supply module includes a first power supply unit that supplies power to the display module and a second power supply unit that supplies power to the central processing unit.
  • the first power supply unit has the same structure as the second power supply unit, and the first power supply unit
  • the capacitor C7, the capacitor C8, the chip U2, the capacitor C9, the capacitor C10 and the inductor L1 are connected.
  • the Vin pin of the chip U2 is respectively connected to the anode of the capacitor C7 and one end of the capacitor C8, and the Vout pins of the chip U2 are respectively connected.
  • the unit includes a capacitor C11, a capacitor C12, a chip U3, a capacitor C13, a capacitor C14, and an inductor L2.
  • the Vin pin of the chip U3 is respectively connected to the anode of the capacitor C11 and one end of the capacitor C12, and the Vout pins of the chip U3 are respectively connected.
  • One end of the capacitor C13, the anode of the capacitor C14, and one end of the inductor L, the cathode of the capacitor C11, the other end of the capacitor C12, the GND pin of the chip U3, one end of the capacitor C13, and the cathode of the capacitor C14 are all grounded.
  • the display module includes a chip U1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, and a resistor R1.
  • the 29th pin of the chip U1 is grounded via the capacitor C6, and the chip U1 is
  • the second leg of the chip U1 is grounded via the resistor C3, and the sixth leg of the chip U1 is grounded via the capacitor C4.
  • the sixth leg of the chip U1 is grounded via the capacitor C3, and the sixth leg of the chip U1 passes through the capacitor C4.
  • the fourth leg of the chip U1 connects the capacitor C2 to the fifth leg of the chip U1
  • the second leg of the chip U1 connects the capacitor C1 to the third leg of the chip U1, the chip U1
  • the 8th, 11th, 12th, 16th, 17th, and 20th-25th feet are grounded.
  • the central processing unit MCU includes a chip U4, a capacitor C15, a capacitor C16, a switch SW1, and The switch SW2, the seventh and eighth legs of the chip U4 are grounded via the capacitor C15, the 13th pin of the chip U4 is grounded via the capacitor C16, and the 19th leg of the chip U4 is connected to the switch SW1. At one end, the 20th pin of the chip U4 is connected to one end of the switch SW2, and the 18th and 10th pins of the chip U4 are grounded.
  • the heating detection AD feedback module includes a resistor R10, a transistor Q1, a resistor R9, a MOS transistor Q2, a resistor R7, a resistor R8 terminal P3, and a capacitor C18, and one end of the resistor R10 is connected to the base of the transistor Q1.
  • the collector of the transistor Q1 is connected to the gate of the MOS transistor Q2 and one end of the resistor R9.
  • the drain of the MOS transistor is connected to the first leg of the terminal P3, and the second leg of the terminal P3 is respectively resistor R7.
  • One end of the resistor R8 and the other end of the resistor R8 are grounded via a capacitor C18, and the other end of the resistor R7 and the emitter of the transistor Q1 are grounded.
  • the heat generating module includes a resistor Rt.
  • the button input module includes a resistor R2, a resistor R3, a resistor R4, a button S1, a button S2, and a button S3.
  • One end of the resistor R2 is connected to one end of the button S1, and one end of the resistor R3 is connected to the button S2.
  • One end of the resistor R4 is connected to one end of the button S3, and the other end of the button S1, the other end of the button S2, and the other end of the button S3 are grounded.
  • the voltage detecting module block includes a resistor R5, a resistor R6 and a capacitor C17.
  • One end of the resistor R5 is respectively connected to one end of the resistor R6 and one end of the capacitor C17, and the other end of the resistor R6 and the other end of the capacitor C17. Both are grounded.
  • the display module adopts built-in boost and SPI three-wire communication interface mode, which is stable at high speed.
  • the power supply module adopts two power supply modes to supply power to the OLED.
  • the built-in boost of the display module prevents the power supply from interfering with the MCU power supply, which causes the AD calculation to be inaccurate. Therefore, the power supply is isolated.
  • MCU (SN8F27E93L) central processing unit with 1K RAM, 16K ROM, 12-bit high-precision ADC input channel, PWM with built-in hardware module, more sophisticated detection, more convenient control, effective implementation of system stability and coordination .
  • the data fitting analysis shows the calculation relationship between AD and temperature T.
  • the above calculation relationship is different according to the heat generation system, and the generated calculation relationship is also different. Therefore, the above calculation relationship refers to supporting the heat generation system as an embodiment.
  • the temperature value T0 corresponding to different AD can be calculated, the output is displayed, and the MCU is fed back to the MCU.
  • the MCU obtains the feedback value and the set value only to see the comparison.
  • the PID algorithm is used to realize the precise control of the heating element. .
  • a PID controller (also known as a PID regulator) controlled by the ratio of deviation (P), integral (I), and derivative (D) is the most widely used automatic controller. It has the advantages of simple principle, easy implementation, wide application range, independent control parameters, simple selection of parameters, etc.; and theoretically, it can be proved that the typical object of process control--"first-order lag + pure lag" and The control object of "second-order lag + pure lag", PID controller is an optimal control.
  • the PID regulation law is an effective method for dynamic quality correction of continuous systems. Its parameter setting method is simple and the structure changes flexibly (PI, PD, ).
  • proportional coefficient P The influence of proportional coefficient P on system performance: the proportional coefficient is increased, the action of the system is sensitive, the speed is accelerated, and the steady-state error is reduced; P is too large, the number of oscillations is increased, and the adjustment time is lengthened; when P is too large, the system will It tends to be unstable; if P is too small, it will slow the system. P can choose a negative number, which is mainly determined by the characteristics of the actuator, sensor and control object. If the symbol selection of P is improper, the measured value of the object will be farther and farther away from the set value of the control target. If such a situation occurs, the sign of P must be negated. At the same time, it should be noted that the P parameter of the PID control block of the force control strategy controller is the gain in the PID control.
  • differential action can improve the dynamic characteristics, when D is too large, the overshoot is larger, the adjustment time is shorter; when D is too small, the overshoot is also larger, and the adjustment time is longer; Only when D is appropriate can the overshoot be small and the adjustment time be shortened.
  • the PID controller is a linear regulator.
  • the control amount is formed by linear combination, so it is simply referred to as a PID controller.
  • the analog PID control law in the continuous control system is: In the above formula, u(t) is the output of the controller, e(t) is the deviation between the system given amount and the output quantity, K P is the proportional coefficient, T I is the integral time constant, and T D is the differential time constant. Its corresponding transfer function is:
  • Proportional regulator The proportional regulator reacts immediately to the deviation. Once the deviation occurs, the regulator immediately produces a control effect, so that the output changes in the direction of decreasing the deviation.
  • the strength of the control depends on the proportional coefficient K. P.
  • K P the proportional coefficient
  • the proportional regulator is simple and fast, there is a static difference for the control object whose system response is finite. Increasing the proportional coefficient K P can reduce the static difference.
  • K P is too large, the dynamic quality of the system will be deteriorated, causing the output to oscillate and even causing the closed-loop system to be unstable.
  • Proportional integral regulator In order to eliminate the residual static difference in the proportional adjustment, integral adjustment can be added on the basis of proportional adjustment.
  • the integral adjustment has a cumulative component, as long as the deviation e is not zero, it will affect the control amount u by the cumulative action, thereby reducing the deviation until the deviation is zero. If the integral time constant T I is large, the integral action is weak, and vice versa. Increasing T I will slow down the process of eliminating static differences, but can reduce overshoot and improve stability. The cost of introducing an integral vocabulary is to reduce the speed of the system.
  • Proportional integral differential adjuster In order to speed up the control process, it is necessary to control the tendency of the deviation change at the moment when the deviation occurs or changes, so that the deviation is eliminated in the bud state, which is the principle of differential adjustment. The addition of differential action will help to reduce overshoot, overcome oscillations, and stabilize the system.
  • the control amount can only be calculated according to the deviation value at the sampling time. Therefore, the numerical integration is performed by the circumscribed rectangle method, and the first-order backward difference is numerically differentiated.
  • T Good thing
  • u i is the full output, which corresponds to the position that the actuator of the controlled object should reach at the ith sampling time. Therefore, the above formula is called the PID position type control algorithm.
  • the computer only outputs the control increment, that is, the change portion of the actuator position, and thus the influence of the malfunction is small.
  • the control is obtained by PID calculation, and then the PWM is adjusted to output the duty ratio.
  • Controlled temperature The target curve temperature is 180 degrees corresponding to the data point, as shown in Figure 9.
  • FIG. 11 shows the specific software implementation steps:
  • Step 2 Initialize the MCU, AD, IO port status, timer, etc.
  • Step 3 The user can set the target temperature T by pressing the button.
  • Step 4 Compare the temperature T0 set by the user with the temperature T0 fed back, and calculate the error value to adjust the output. If it is greater than the set temperature, step 5 stops outputting, otherwise step 6 turns on the open PWM value according to the PID calculation.
  • Step 5 Monitor the temperature of the heating element at a certain periodic frequency (for example, monitoring once every 10 milliseconds).
  • the feedback device is connected in series in the circuit. Monitoring the AD requires constant power supply, but the heating element is caused by the power supply. When the temperature rises, the measurement is not accurate. Therefore, when needed, turn on the MOS tube Q2 to supply power. Before turning on, back up the output value in the PWM to measure the temperature. Immediately after the temperature measurement, turn off Q2, and then turn off the PWM output value. In this case, the test time is short, and it takes about 30 microseconds to measure the temperature, which does not affect the temperature parameter of the heating body but has a very accurate temperature. The calculated temperature is output to the display of step 7 OLED and is also fed back to step 4 through step 8 to perform the next adjustment output.
  • a certain periodic frequency for example, monitoring once every 10 milliseconds.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Abstract

La présente invention concerne un système de régulation de température pour un élément de chauffage de cigarette électronique, dans lequel une extrémité de sortie d'un module de rétroaction A/N de détection de chauffage est connectée à une extrémité d'entrée d'une unité centrale de traitement ; une extrémité de sortie de l'unité centrale de traitement est connectée à une extrémité d'entrée d'un module de chauffage, et l'extrémité de sortie du module de traitement central est connectée à une extrémité d'entrée d'un module d'affichage ; une extrémité de sortie d'un module d'entrée à touches est connectée à l'extrémité d'entrée de l'unité centrale de traitement ; un module d'alimentation électrique est connectée électriquement à un module de gestion de source d'alimentation ; le module de gestion de source d'alimentation est connecté à l'unité centrale de traitement à des fins de communication bidirectionnelle ; une extrémité de sortie d'un module de détection de tension est connectée à l'extrémité d'entrée de l'unité centrale de traitement, et une extrémité d'entrée du module de détection de tension est connectée à une extrémité de sortie du module d'alimentation électrique ; une extrémité d'entrée d'un module anti-inverse à batterie est connectée au module d'alimentation électrique, et une extrémité de sortie du module anti-inverse à batterie est connectée à l'extrémité d'entrée de l'unité centrale de traitement ; et le module de gestion de source d'alimentation est connecté électriquement au module d'affichage et à l'unité centrale de traitement respectivement. Le système est simple en termes de structure et est peu coûteux.
PCT/CN2015/096043 2015-06-15 2015-11-30 Système de régulation de température pour élément de chauffage de cigarette électronique WO2016201911A1 (fr)

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CN201510331222.6A CN104902595B (zh) 2015-06-15 2015-06-15 一种电子烟发热体的温度控制系统

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