Patent Application
20240206561
This application claims the benefit of Chinese patent application No. 202211668676.9 filed on Dec. 23, 2022, the entire contents of which are incorporated herein by reference.
The present application relates to electronic cigarettes, and in particular, to an electronic cigarette having double atomizing cores and a method for controlling the heat balance thereof.
Electronic cigarettes are electronic atomization devices for heating and atomizing e-liquid through a heating wire; heat of different powers is output by driving and heating the heating wires having different resistance through a lithium battery, so as to atomize the e-liquid around the heating wire, thereby outputting the atomized substance for the user to inhale.
In order to increase the atomization amount in a single inhalation of the e-liquid, conventionally, the resistance of the heating wire is reduced, or the driving voltage at both ends of the heating wire is increased to increase the atomization amount. However, after the heating wire operates for a long time, carbon deposits will be generated on its surface, and the longer the operating time of the heating wire, the more carbon will be deposited. Excessive carbon deposits will affect the atomization taste of e-liquid. At the same time, in order to pursue the taste of atomization, the excessive heating power of the heating wire also aggravates and accelerates the generation of carbon deposits. As a result, the amount of e-liquid contained in the disposable e-liquid compartment is limited, and the service life is short. Therefore, few disposable e-cigarette products with a large e-liquid volume are available on the market.
The present application provides an electronic cigarette having double atomizing cores and a method for controlling the heat balance thereof, in order to tackle the problem of carbon deposits on the single heating wire of the existing electronic cigarettes.
An embodiment of the present application provides an electronic cigarette having double atomizing cores, which includes: a cigarette rod, the cigarette rod includes an oil compartment having a lithium battery, a circuit board, a fixing plate, a first atomizing core, and a second atomizing core arranged therein:
Optionally, in the electronic cigarette having double atomization cores, the first atomization core and the second atomization core are arranged symmetrically and alongside with each other in the oil compartment.
Optionally, in the electronic cigarette having double atomizing cores, the circuit board is provided with a first heating drive circuit, a second heating drive circuit, and a processor:
Optionally, in the electronic cigarette having double atomizing cores, the first heating drive circuit includes a first switch transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor;
Optionally, in the electronic cigarette having double atomizing cores, the second heating drive circuit includes a second switch transistor, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor;
A second aspect of the present application provides a method for controlling the heat balance of an electronic cigarette having double atomizing cores, the method includes:
Optionally, in the method for controlling the heat balance, the step of selecting, when the operating mode is a single-core operating mode, an atomizing core with a short total heating and atomizing time from the first atomizing core and the second atomizing core to heat includes:
Optionally, in the method for controlling the heat balance, after the step of selecting, when the operating mode is a single-core operating mode, an atomizing core with a short total heating and atomizing time from the first atomizing core and the second atomizing core to heat, the method further includes:
Optionally, in the method for controlling the heat balance, the step of heating simultaneously the first atomizing core and the second atomizing core when the operating mode is a double-core operating mode includes:
Optionally, in the method for controlling the heat balance, after the step of heating simultaneously the first atomizing core and the second atomizing core when the operating mode is a double-core operating mode, the method further includes:
In the technical proposals of the present application, the electronic cigarette having double atomizing cores includes a cigarette rod, the cigarette rod includes an oil compartment having a lithium battery, a circuit board, a fixing plate, a first atomizing core, and a second atomizing core arranged therein: the lithium battery supplies power to the circuit board, and the circuit board controls the first atomizing core and the second atomizing core to maintain balanced heating under a single-core alternating operation and a double-core simultaneous operation, the fixing plate is used to fix the first atomizing core and the second atomizing core and is connected with the positive and negative electrodes of the lithium battery. The double atomizing cores can be heated alternately, which produces less carbon deposits than heating by a single heating wire, which solves the problem of easy carbon deposition in existing e-cigarettes using a single heating wire, and also prolongs the service life of the atomizing cores. The double atomizing cores can be heated simultaneously, which improves the utilization rate of the e-liquid.
The present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.
It can be understood that relational terms such as first and second etc. used herein are only for distinguishing one object, operation, or direction from another object, operation, or direction, and not requiring nor implying any relationship or order between these objects, operations, or directions. It should be understood that the orientations or positional relationships indicated by terms “upper”, “lower”, “front”, “rear”, “left”, “right”, “inner”, “outer”, “side”, “top”, “bottom” etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than limiting the application. In the following description, various parameters and components are described for embodiments with different arrangements, and these specific parameters and components are only examples and do not intend to limit the embodiments of the present application.
Referring to
The first atomizing core A and the second atomizing core B share a large-capacity oil compartment 2, and the two atomizing cores are arranged symmetrically alongside with each other in the oil compartment 2. An oil storage cotton 5 is wrapped around the first atomizing core A and the second atomizing core B. The resistance values of the first atomizing core A and the second atomizing core B match each other, that is, the resistance values of the two atomizing cores are close to or equal to each other, so that the heating power can be balanced.
When the electronic cigarette is in the single-core operating mode, the first atomizing core A and the second atomizing core B operates alternately, with only one atomizing core being heated each time, so that the heat is balanced to steadily consume the oil around the atomizing core. Since the duration of which a user uses varies every time, the cumulative heating time of each atomizing core is also different. Therefore, when the two atomizing cores operate alternately, the priority of operation is based on the respective total heating and atomizing time (that is, the cumulative heating time), that is, the atomizing core with a shorter total heating and atomizing time operates first, and a corresponding atomizing core is selected to operate again according to the total heating atomization time at the next heating (re-inhalation). It can be seen from the oil-guiding path 6 in
When the electronic cigarette is in the double-core operating mode, the first atomizing core A and the second atomizing core B operate simultaneously. In this way, the heating power of the respective atomizing core is not increased, while the amount of atomized oil in a single inhalation is increased without shortening the service life of the atomizing core. In the existing technology with a single atomizing core, in order to increase the amount of atomization, the resistance of the atomizing core must be reduced or the driving voltage at both ends of the atomizing core must be increased, such that the heating power can be increased to increase the amount of atomization. However, this must be achieved by optimizing and improving the oil conduction speed and matching the oil conduction and atomizing core (increasing the oil conducting speed through the structure, and increasing the atomizing power by increasing the voltage at both ends of the atomizing core). When the remained oil is reduced during a later stage of using the electronic cigarette, if the oil conduction speed does not match well with the atomizing core, the risk of burning the atomizing core will increase. Moreover, the heating power of the single atomizing core that is too high will also increase the carbon deposit on the atomizing core and reduce the service life of the atomizing core.
Also referring to
It should be understood that the circuit board is also provided with an airflow sensor, a battery charging management circuit, an LED status indicator circuit, an atomizing core short-circuit detection circuit, and the like, which can all be found in the prior art, and the functions and circuit structures are the same. Therefore, it will not be described in detail herein.
Also referring to
The first switch transistor Q1 is preferably a PMOS tube of WSD1216DN22 type, and the processor outputs the first drive signal MCU_HEAT_A to control the on and off of the first switch transistor Q1. When the first drive signal MCU_HEAT_A is at a low level, the first switch transistor Q1 is turned on, the battery voltage BAT+ supplied by the lithium battery 3 is output to the first atomizing core A through Q1, and a grounded circuit is formed on the first atomizing core A, so that the first atomizing core A starts to heat once energized. When the first drive signal MCU_HEAT_A is at a high level, the first switch transistor Q1 is turned off, the output of the battery voltage BAT+ is stopped, and the first atomizing core A is powered off to stop heating.
The resistance of the first resistor R1 is preferably 1 kΩ, the first resistor R1 acts as a protection to prevent Q1 from operating automatically when the control terminal of the processor fails. The resistance of the second resistor R2 is preferably 560 kΩ, the second resistor R2 is used for no-load detection, that is, to detect whether the first atomizing core is connected. The resistance of the third resistor R3 and the fourth resistor R4 is preferably 1 kΩ, both resistors are used for current limiting to protect the analog input detection port connected to the processor. Through the sampling of the third resistor R3, a signal MCU_MOS_CMP_N_A is output from the other terminal of the third resistor R3 to the processor. The signal MCU_MOS_CMP_N_A is used to detect the voltage H_A± at both ends of the first atomizing core A. The processor determines whether the atomizing core A is short-circuited according to the voltage value of the signal MCU_MOS_CMP_N_A, so as to realize the over-current protection function. Through the sampling of the fourth resistor R4, a signal MCU_MOS_CHECK_A is output from the other terminal of the fourth resistor R4 to the processor, and the signal MCU_MOS_CHECK_A is also used to detect the voltage H_At± at both ends of the first atomizing core A: the processor determines whether the output voltage of the first atomizing core A when heating meets the operating requirements. When the voltage is low; it is determined that the lithium battery does not have enough power, the processor then controls the LED status indicator circuit to light up the light of a corresponding color to indicate the battery level.
Preferably, the first heating drive circuit 41 also includes a fifth resistor R5, one terminal of the fifth resistor R5 is connected to the gate of the first switch transistor Q1 and one terminal of the first resistor R1, and the other terminal of the fifth resistor R5 is connected to the processor. The resistance value of the fifth resistor R5 is preferably 1 kΩ, which is used for providing current limiting protection on the circuit on which the processor controls Q1 to be turned on and off, so as to avoid burning out Q1.
The second heating drive circuit 42 includes a second switch transistor Q2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. A gate of the second switch transistor Q2 is connected to one terminal of the sixth resistor R6 and the processor. A source of the second switch transistor Q2 is connected to the other terminal of the sixth resistor R6, the power supply terminal, and one terminal of the seventh resistor R7. A drain of the second switch transistor Q2 is connected to the other terminal of the seventh resistor R7, one terminal of the eighth resistor R8, the other terminal of the ninth resistor R9, and one terminal TP3 of the second atomizing core B. The other terminal of the eighth resistor R8 and the other terminal of the ninth resistor R9 are both connected to the processor. The other terminal TP4 of the second atomizing core B is grounded.
The second switch transistor Q2 is preferably a PMOS tube of WSD1216DN22 type, and the processor outputs a second drive signal MCU_HEAT_B to control the on and off of the second switch transistor Q2. When the second drive signal MCU_HEAT_B is at a low level, the second switch transistor Q2 is turned on, and the battery voltage BAT+ supplied by the lithium battery 3 is output to the second atomizing core B through Q2, so that a grounded circuit is formed on the second atomizing core B, and the second atomizing core B starts to be heated once energized. When the second drive signal MCU_HEAT_B is at a high level, the second switch transistor Q2 is turned off, the output of the battery voltage BAT+ is stopped, and the second atomizing core B is powered off to stop heating.
The resistance value of the sixth resistor R6 is preferably 1 kΩ, which acts as a protection to prevent Q2 from operating automatically when the control terminal of the processor fails. The resistance value of the seventh resistor R7 is preferably 560 kΩ, which is used for no-load detection, that is, to detect whether the second atomizing core B is connected. The resistance values of the eighth resistor R8 and the fourth resistor R4 are preferably 1 kΩ, both resistors are used for current limiting and protect the analog input detection port connected to the processor. Through the sampling of the eighth resistor R8, a signal MCU_MOS_CMP_N_B is output from the other terminal of the eighth resistor R8 to the processor. The signal MCU_MOS_CMP_N_B is used to detect the voltage H_A± at both ends of the second atomizing core B: the processor determines whether the second atomizing core B is short-circuited according to the voltage value of the signal MCU_MOS_CMP_N_B, thereby providing over-current protection. Through the sampling of the ninth resistor R9, a signal MCU_MOS_CHECK_B is output from the other terminal of the ninth resistor R9 to the processor, and the signal MCU_MOS_CHECK_B is also used to detect the voltage H_At± at both ends of the second atomizing core B: the processor determines whether the output voltage of the second atomizing core B when heated meets the operating requirements, when the voltage is low; it is determined that the lithium battery does not have enough power, so that the processor then controls the LED status indicator circuit to light up the light of a corresponding color to indicate the battery level.
Preferably; the first heating drive circuit 41 also includes a tenth resistor R10, one terminal of the tenth resistor R10 is connected to the gate of the second switching transistor Q2 and the one terminal of the sixth resistor R6, and the other terminal of the tenth resistor R10 is connected to the processor. The resistance value of the tenth resistor R10 is preferably 1 kΩ, which is used for providing current limiting protection on the circuit on which the processor controls the on and off of Q2, so as to avoid burning out Q2.
In the single-core operating mode, when the first atomizing core A or the second atomizing core B is heated separately, and the processor will record the cumulative heating time of the first atomizing core A and the second atomizing core B respectively. The first drive signal MCU_HEAT_A and the second drive signal MCU_HEAT_B indicate the duration for which the low level current lasts, therefore, when the next reheating starts, the cumulative heating time of the first atomizing core A and the second atomizing core B will be compared, and the heating core with a shorter heating time will be chosen to operate.
Based on the above-mentioned electronic cigarette with double atomizing cores, this embodiment further provides a method for controlling the heat balance of an electronic cigarette with double atomizing cores. Referring to
The surface of the cigarette rod 1 is provided with a button (environmentally friendly trigger button), and when the button is detected to be pressed five times by the processor, the cigarette rod is activated to start heating, which can be heated according to the currently selected operating mode. In order to allow time for switching the operating mode, the processor reads the current operating mode and starts timing (for example, 5 seconds) after detecting the activation of the cigarette rod: the operating mode used before switching off last time is selected: the operating mode is switched when pressing of the button is detected before the timing stops, and the user can switch the operating mode for multiple times. When the timing is finished, the currently selected operating mode is read and step S200 or step S300 is executed correspondingly.
In order for the user to know the current operating mode, the processor can control the LED state indicator circuit to display the current operating mode, for example, one indicator light is on in the single-core operating mode, and two indicator lights are on in the double-core operating mode, which is not limited herein.
The step S200 includes:
Step S210: when the operating mode is the single-core operating mode, the respective total heating and atomizing time of the first atomizing core and the second atomizing core is read.
The respective total heating and atomizing time of the atomizing cores is stored in the processor, and when each atomizing core works alone, each heating and atomizing time is timed and accumulated by the processor.
Step S220: it is determined whether the total heating and atomizing time of the first atomizing core is greater than the total heating and atomizing time of the second atomizing core; if yes, the second atomizing core is controlled to be heated: otherwise, the first atomizing core is controlled to be heated.
Since the durations for which the user uses are different every time. In order to balance the operating time of heating and the service life of the two atomizing cores, the atomizing core with a shorter total heating and atomizing time is selected to operate first. If the total heating and atomizing of the first atomizing core A is longer than that of the second atomizing core B, the second atomizing core B will operate: otherwise, the first atomizing core A will operate. If the total heating and atomizing time of the two is equal, the first atomizing core A is selected randomly or by default.
To control the heating of the second atomizing core, the processor outputs a low-level (valid) second drive signal MCU_HEAT_B to control the energize the second switch transistor Q2, the battery voltage BAT+ supplied by the lithium battery 3 is output to the second atomizing core B through Q2, and the second atomizing core B starts heating once energized. resistors R8 and R9 sample the voltage at both ends of the second atomizing core B, and output the signals MCU_MOS_CMP_N_B and MCU_MOS_CHECK_B to the processor, so that the processor can determine whether the second atomizing core B is short-circuited and whether the output voltage during heating meets the operating requirements.
To control the heating of the first atomizing core, the processor outputs a low-level first drive signal MCU_HEAT_A to energize the first switch transistor Q1, and the voltage BAT+ supplied by the lithium battery 3 is output to the first atomizing core A through Q1, and the first atomizing core A starts heating when it is energized. R3 and R4 sample the voltage at both ends of the first atomizing core A, and output signals MCU_MOS_CMP_N_A and MCU_MOS_CHECK_A to the processor, so that the processor can determine whether the first atomizing core A is short-circuited and whether the output voltage during heating meets the operating requirements.
In the heating process of any atomizing core, the processor also times the heating time, and when the heating time is reached, outputs a corresponding invalid drive signal to turn off the corresponding switching transistor, and stops supplying power to the atomizing core to stop heating.
For example, when the heating time of the first atomizing core is reached, the output high-level first drive signal MCU_HEAT_A controls the first switch transistor Q1 to be turned off, the battery voltage BAT+ stops outputting, and the first atomizing core A is powered off and stops heating, the processor accumulates the current heating time into the total heating and atomizing time of the first atomizing core A, and the heating cycle completes. Similarly, when the heating time of the second atomizing core is reached, the output high-level (invalid) second drive signal MCU_HEAT_B controls the second switching transistor Q2 to be turned off, the battery voltage BAT+ stops outputting, and the second atomizing core B is powered off and the heating is stopped, and the processor accumulates the current heating time into the total heating and atomizing time of the second atomizing core B, and the current heating cycle completes.
The step S300 specifically includes: when the operating mode is a double-core operating mode, the processor outputs a valid first drive signal to control the first heating drive circuit to supply power to the first atomizing core, and outputs a valid second drive signal to control the second heating drive circuit to supply power to the second atomizing core, and the first atomizing core and the second atomizing core are heated simultaneously.
During heating, the processor counts the heating time, and when the heating time is reached, the processor outputs an invalid first drive signal to control the first heating drive circuit to stop the power supply, and outputs an invalid second drive signal to control the second heating drive circuit to stop the power supply; the first atomizing core and the second atomizing core are powered off to stop heating, and the current heating cycle completes. Since the two atomizing cores are heated simultaneously, the heating time is the same. Therefore, the total heating and atomizing time does not need to be accumulated.
In summary; because the taste and service life of the atomizing core are affected by the carbon deposition on the atomizing core, in the case of atomizing the same amount of oil, the electronic cigarette with double atomizing cores and the method for controlling the heat balance thereof provided by the present application produce less carbon deposit and have a longer service life than single atomizing core, as double atomizing cores are adopted to generate heat alternately and the respective operating time is balanced.
Because the utilization rate of oil in the oil storage cotton is affected by the distance from the atomizing core to the distal end of the oil storage cotton, the further the distance, the worse the oil conduction performance, and the lower the utilization rate of the oil. In the case of using the same oil storage cotton structure, the double atomizing core can greatly reduce the radius of the oil conduction or the distance of the oil conduction path, and the oil consumption is balanced, which can make the oil at the distal end of the oil compartment smoothly and evenly transferred to the atomizing core, solving the problem of oil transfer in large oil compartments. Compared with the structure of a single atomizing core, the utilization rate of the oil can be improved and the risk of burning the atomizing core due to poor oil conduction can be reduced: at the same time, the consistency of the taste of the double atomizing cores are ensured throughout the early and the later stage of consumption of the oil in the entire oil compartment, and the taste is more balanced, which provides better consistency of the taste throughout the early and the later stage compared to that using a single atomizing core.
The match of resistance of the above-mentioned first atomizing core and the second atomizing core realizes a combined balance of the heating power, the taste of the double atomizing cores, the fuel consumption, and the operating life, thereby realizing a heat balance.
Above embodiment merely show optional embodiments of the present application, and cannot be interpreted as the limitation to the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211668676.9 | Dec 2022 | CN | national |
