VAPE DEVICE LIQUID QUANTITY CONTROL SYSTEM

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202411338619.3, filed on Sep. 25, 2024, which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present application relates to the technical field of vape devices, and more particularly to a vape device liquid quantity control system.

BACKGROUND

In traditional electronic vape devices, the transparent chamber stores liquid, and the heating coil is directly soaked in the liquid reservoir. When the product is placed inside a high-temperature car interior, the gas in the liquid reservoir expands at high temperature, and under the effect of external atmospheric pressure, liquid leakage and seepage occur. This issue is currently a pain point in the electronic vape device industry. Moreover, the liquid quantity of the vape device is generally filled once or in an open refillable manner, and the usage process is relatively limited, with no automatic function for liquid filling, resulting in the disposable-use phenomenon of the atomizing device.

SUMMARY

The present application provides a vape device liquid quantity control system, aiming to solve the problems of liquid leakage, liquid seepage, and lack of automatic liquid filling function in the existing vape device.

The present application provides a vape device liquid quantity control system comprising a housing as well as a liquid storage chamber, a liquid reservoir, an atomization chamber, a heating element, a porous liquid-absorbent material, a sealing plug, and a drive mechanism all arranged within the housing; the heating element and the porous liquid-absorbent material are assembled inside the atomization chamber, with the porous liquid-absorbent material wrapped around the heating element; the porous liquid-absorbent material is in contact with the liquid reservoir; the liquid storage chamber and the liquid reservoir are coupled through a liquid filling hole; the sealing plug is adapted to the liquid filling hole; the drive mechanism drives the sealing plug to move up and down to open or close the liquid filling hole.

As a further improvement of the present application, the drive mechanism comprises a push rod solenoid valve, a connecting rod, and a restoring spring; the push rod solenoid valve comprises an electromagnet and a push rod that is arranged within the electromagnet and can extend and retract; the push rod links to one end of the connecting rod, and another end of the connecting rod passes through the liquid filling hole and connects to the sealing plug; the connecting rod is arranged with a limit snap component; the restoring spring is sleeved on the connecting rod with two ends connected between the limit snap component and the liquid filling hole, respectively.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a PCBA arranged inside the housing; the PCBA has arranged therein an MCU module and a solenoid control module; a solenoid is wound around the electromagnet; the MCU module comprises a chip U2, and the solenoid control module for the electromagnet comprises a MOS transistor Q2, a voltage regulator diode D1, a resistor R13, and a resistor R15; the source of the MOS transistor Q2 is connected to one end of the solenoid and to the negative terminal of the voltage regulator diode D1; another end of the solenoid and the positive terminal of the voltage regulator diode D1 are grounded; the drain of the MOS transistor Q2 is connected to one end of the resistor R13 and to a BAT+ terminal; the gate of the MOS transistor Q2 is connected to another end of the resistor R13 and to one end of the resistor R15; another end of the resistor R15 is connected to a PWM2 pin of the chip U2.

As a further improvement of the present application, the vape device liquid quantity control system further comprises an airflow sensor used for detecting airflow; the airflow sensor is coupled to the atomization chamber; the MCU module further comprises a resistor R16; a MIC Out pin of the chip U2, the resistor R16, and the airflow sensor are connected in series in that order.

As a further improvement of the present application, a process by which the MCU module controls the opening or closing of the liquid filling hole is as follows:

• • a1. When the vape device is not in use, the PWM2 pin of the chip U2 outputs a high-level signal, the MOS transistor Q2 is turned off, the solenoid is unpowered, the electromagnet loses magnetic force, and the restoring spring pulls the sealing plug down to close the liquid filling hole;
  • a2. When the vape device is in use, the airflow sensor triggers a signal, and the chip U2 begins counting the usage time; when a preset usage duration set by the chip U2 is reached, the chip U2 outputs a low-level signal through the PWM2 pin, the MOS transistor Q2 is turned on, the solenoid is powered, and the electromagnet generates upward magnetic force, and the push rod and the connecting rod push the sealing plug to open the liquid filling hole;
  • a3. The chip U2 begins counting the time that the sealing plug remains open; when a preset opening duration set by the chip U2 is reached, the PWM2 pin of the chip U2 switches to output a high-level signal, the MOS transistor Q2 is turned off, the solenoid is powered, and the electromagnet loses magnetic force, and the restoring spring pulls the sealing plug downward to close the liquid filling hole.

As a further improvement of the present application, the PCBA further comprises a heating element control module, the heating element control module comprising a MOS transistor Q1, a resistor R9, a resistor R10, and a resistor R12; the source of the MOS transistor Q1 is connected to one end of the resistor R10 and one end of the heating element, and another end of the heating element is grounded; another end of the resistor R10 is connected to a VDCDC_READ pin of the chip U2; the drain of the MOS transistor Q1 is connected to one end of the resistor R9 and to the BAT+ terminal; the gate of the MOS transistor Q1 is connected to another end of the resistor R9 and to one end of the resistor R12, and another end of the resistor R12 is connected to a PWM1 pin of the chip U2.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a battery arranged within the housing; the positive terminal of the battery is connected to the BAT+ terminal, and the negative terminal of the battery is grounded.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a charging port; the PCBA further comprises a charging module; the charging module comprises a chip U1; pin 4 of the chip U1 is connected to the charging port, pin 5 of the chip U1 is connected to a 5V READ pin of the chip U2, pin 1 of the chip U1 is connected to a C CHECK pin of the chip U2, and pin 3 of the chip U1 is connected to the BAT+ terminal.

As a further improvement of the present application, the vape device liquid quantity control system according to claim 3, characterized in that, the PCBA further comprises a gyroscopic acceleration sensor module; the gyroscopic acceleration sensor module comprises a chip U3; pin 12, pin 2, pin 5, and pin 6 of the chip U3 are respectively connected to a SCL pin, SDA pin, INT1 pin, and INT2 pin of the chip U2.

As a further improvement of the present application, a process by which the gyroscopic acceleration sensor module controls the opening or closing of the liquid filling hole is as follows:

• • b1. When the chip U3 detects that a tilt angle of the vape device is greater than a set tilt angle, the chip U3 sends a tilt signal to the chip U2 through the SCL, SDA, INT1, and INT2 pins; the PWM2 pin of the chip U2 outputs a high-level signal, the MOS transistor Q2 is turned off, the solenoid is powered off, the electromagnet 52 loses magnetic force, and the restoring spring drives the sealing plug downward to close the liquid filling hole;
  • b2. When the electronic vape device is placed upright or the tilt angle is less than the set tilt angle, the chip U3 stops sending the signal to the chip U2.

As a further improvement of the present application, another end of the connecting rod is arranged with an inverted buckle; the sealing plug is arranged with an inverted buckle hole; the inverted buckle snaps into the inverted buckle hole.

As a further improvement of the present application, a sealing holder is arranged between the liquid filling hole and the push rod solenoid valve for the connecting rod to pass through; an upper end of the sealing holder is arranged with at least one sealing ring sleeved on the connecting rod; the restoring spring is connected between the sealing holder and the limit snap component.

As a further improvement of the present application, an inner wall at one end of the liquid filling hole near the liquid storage chamber is arranged with a sealing bevel; a lower end of the sealing plug is arranged with a sealing conical surface adapted to the sealing bevel.

As a further improvement of the present application, the sealing plug is arranged with a step boundary extending to the side; when the liquid filling hole is closed, the step boundary covers the top of the liquid filling hole.

As a further improvement of the present application, the housing comprises a liquid tank upper shell and an atomization holder; the liquid tank upper shell is sealed and connected to the atomization holder; the liquid storage chamber is arranged within the liquid tank upper shell; the liquid reservoir and the atomization chamber are arranged within the atomization holder; the liquid filling hole is arranged on the atomization holder.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a first sealing material and a first mouthpiece; the atomization holder is arranged with a first central air tube; the sealing material is sealed and connected to the liquid tank upper shell; a suction hole is arranged within the first sealing material; two ends of the first central air tube are respectively coupled to the atomization chamber and the bottom of the suction hole; the top of the suction hole is coupled to the first mouthpiece.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a second sealing material; the liquid tank upper shell is arranged with a second mouthpiece and a second central air tube; the upper end of the second central air tube is coupled to the second mouthpiece; the atomization holder is arranged with an atomization hole coupled to the atomization chamber; a suction hole is arranged within the second sealing material; two ends of the second sealing material are respectively connected to the atomization hole and the second central air tube.

As a further improvement of the present application, the vape device liquid quantity control system further comprises a sealed base shell, an airflow sensor, and an absorbent member; the sealed base shell is connected to the atomization holder and seals the bottom of the atomization chamber; the airflow sensor and the absorbent member are connected to the sealed base shell.

The beneficial effects of the present application are: the sealing plug is driven by the drive mechanism to move up and down to achieve the opening and sealing of the liquid filling hole, thereby controlling the connection and disconnection between the liquid storage chamber and the liquid reservoir, to be able to achieve automatic liquid filling by controlling the opening and closing of the liquid storage chamber to prevent liquid leakage or liquid seepage during transportation or under high temperature conditions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall structural diagram of a vape device liquid quantity control system of the present application;

FIG. 2 is an internal structural diagram of a first structural mode of the vape device liquid quantity control system of the present application;

FIG. 3 is a structural exploded diagram of the first structural mode of the vape device liquid quantity control system of the present application;

FIG. 4 is a structural decomposition diagram of a connecting rod and a sealing plug in the present application;

FIG. 5 is a structural cross-sectional diagram of a liquid filling hole in a closed state in the first structural mode of the vape device liquid quantity control system of the present application;

FIG. 6 is a structural cross-sectional diagram of the liquid filling hole in an open state in the first structural mode of the vape device liquid quantity control system of the present application;

FIG. 7 is a structural cross-sectional diagram of a second structural mode of the vape device liquid quantity control system of the present application;

FIG. 8 is a structural diagram of a sealing plug in the second structural mode of the present application;

FIG. 9 is a circuit structural diagram of an MCU module in the present application;

FIG. 10 is a circuit structural diagram of a solenoid control module in the present application;

FIG. 11 is a circuit structural diagram of a heating element control module in the present application;

FIG. 12 is a circuit structural diagram of a charging module in the present application;

FIG. 13 is a circuit structural diagram of a gyroscopic acceleration sensor module in the present application;

FIG. 14 is an operational flowchart of the vape device liquid quantity control system in the present application.

DETAILED DESCRIPTION OF EMBODIMENTS

In order to make the objectives, technical solutions, and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 to FIG. 8, a vape device liquid quantity control system of the present application comprises a housing as well as a liquid storage chamber 21, a liquid reservoir 31, an atomization chamber 32, a heating element 34, a porous liquid-absorbent material 35, a sealing plug 4, and a drive mechanism 5 all arranged within the housing. The heating element 34 and the porous liquid-absorbent material 35 are assembled inside the atomization chamber 32, with the porous liquid-absorbent material 35 wrapped around the heating element 34. The porous liquid-absorbent material 35 is in contact with the liquid reservoir 31. The liquid storage chamber 21 and the liquid reservoir 31 are coupled through a liquid filling hole 33. The sealing plug 4 is adapted to the liquid filling hole 33. The drive mechanism 5 drives the sealing plug 4 to move up and down to open or close the liquid filling hole 33.

The present application divides a liquid chamber into two parts, the liquid storage chamber 21 (transparent chamber) and the liquid reservoir 31. At a connection position between the liquid storage chamber 21 and the liquid reservoir 31, the sealing plug 4 is added. By means of a switch, the liquid storage chamber 21 remains closed during use, which can effectively solve the problem of liquid leakage and seepage under negative pressure or high temperature.

The drive mechanism 5 comprises a push rod solenoid valve 51, a connecting rod 54, and a restoring spring 55. The push rod solenoid valve 51 comprises an electromagnet 52 and a push rod 53 that is arranged within the electromagnet 52 and can extend and retract. The push rod 53 links to one end of the connecting rod 54, and another end of the connecting rod 54 passes through the liquid filling hole 33 and connects to the sealing plug 4. The connecting rod 54 is arranged with a limit snap component 56. The restoring spring 55 is sleeved on the connecting rod 54 with two ends connected between the limit snap component 56 and the liquid filling hole 33, respectively.

The lower side of the connecting rod 54 is equipped with the push rod solenoid valve 51, and the push rod 53 of the push rod solenoid valve 51 faces the lower side of the connecting rod 54. When liquid needs to be filled, when a circuit activates the solenoid coil of the electromagnet 52, the electromagnet 52 drives the push rod 53 to overcome the force of the restoring spring 55 and push the connecting rod 54 upward, pushing open the sealing plug 4 and opening the liquid filling hole 33 to begin filling liquid. When the solenoid coil of the electromagnet 52 is turned off, the magnetic force of the electromagnet 52 disappears, and the push rod 53 resets. The connecting rod 54 drives the sealing plug 4 to return to an initial sealed state under the force of the restoring spring 55.

The distance of the upward movement of the push rod 53 of the push rod solenoid valve 51 is greater than 1.5 mm, and the diameter of the liquid filling hole 33 is greater than 4 mm, thereby ensuring effective liquid intake.

As shown in FIG. 4, another end of the connecting rod 54 is arranged with an inverted buckle 57. The sealing plug 4 is arranged with an inverted buckle hole 41. The inverted buckle 57 snaps into the inverted buckle hole 41. The sealing plug 4 and the connecting rod 54 are connected through the inverted buckle 57. One end of the connecting rod 54 is designed with the inverted buckle 57 structure, which is installed in the inverted buckle hole 41 of the sealing plug 4 and can drive the sealing plug 4 to move up and down.

A sealing holder 6 is arranged between the liquid filling hole 33 and the push rod solenoid valve 51 for the connecting rod 54 to pass through. An upper end of the sealing holder 6 is arranged with at least one sealing ring 61 sleeved on the connecting rod 54. The restoring spring 55 is connected between the sealing holder 6 and the limit snap component 56.

One end of the sealing plug 4 extends into the liquid storage chamber 21, and another end is exposed outside and connected to the connecting rod 54. The middle of the connecting rod 54 passes through at least one sealing ring 61. The sealing ring 61 ensures that the connecting rod 54 remains sealed during upward and downward displacement, ensuring no liquid leakage. A lower end of the connecting rod 54 is equipped with a limit snap component 56. The restoring spring 55 is installed between the limit snap component 56 and the sealing holder 6. During assembly, the restoring spring 55 is pre-compressed. Under the pressure of the restoring spring 55, the connecting rod 54 pulls the sealing plug 4 downward, and a beveled surface around the sealing plug 4 tightly abuts a beveled surface around the liquid filling hole 33, thereby achieving a sealing effect. This design is a normally closed design, that is, under the force of the restoring spring 55, the liquid filling hole 33 of the liquid storage chamber 21 remains sealed at all times.

An inner wall at one end of the liquid filling hole 33 near the liquid storage chamber 21 is arranged with a sealing bevel 36. A lower end of the sealing plug 4 is arranged with a sealing conical surface 42 adapted to the sealing bevel 36. A silicone sealing plug 4 is located at the liquid filling hole 33, with its outer periphery made into a bevel, and the outer periphery of the liquid filling hole 33 of the liquid storage chamber 21 is also a bevel. When the two bevels tightly abut each other, the sealing effect can be achieved. The sealing plug 4 is a sealing plug 4 made of soft materials such as silicone or TPE, which can achieve a better sealing effect.

As a further improvement of the sealing plug 4 structure, as shown in FIG. 7 and FIG. 8, the sealing plug 4 is arranged with a step boundary 43 extending to the side. When the liquid filling hole 33 is closed, the step boundary 43 covers the top of the liquid filling hole 33. The step boundary 43 is made of soft material. When opening the liquid filling hole 33, the step boundary 43 will be lifted with the sealing plug 4 to open the liquid filling hole 33. When closing the liquid filling hole 33, the step boundary 43 resets with the sealing plug 4 under the action of the restoring spring 55, and at the same time, the step boundary 43 fits and covers the top of the liquid filling hole 33, thereby sealing the liquid filling hole 33.

The housing comprises a liquid tank upper shell 2 and an atomization holder 3. The liquid tank upper shell 2 is sealed and connected to the atomization holder 3. The liquid storage chamber 21 is arranged within the liquid tank upper shell 2. The liquid reservoir 31 and the atomization chamber 32 are arranged within the atomization holder 3. The liquid filling hole 33 is arranged on the atomization holder 3. The liquid reservoir 31 can store 1-5 ml of liquid, which is used during the normal operation of the electronic vape device. The liquid storage chamber 21 is set to store 5-20 ml of liquid. The liquid storage chamber 21 comprises the liquid tank upper shell 2, a central air tube 37, and the atomization holder 3. One liquid filling hole 33 is defined on the atomization holder 3. One sealing plug 4 is arranged in the middle of the liquid filling hole 33 for sealing the liquid storage chamber 21.

The housing further comprises an outer shell 1. Components such as the liquid tank upper shell 2, the atomization holder 3, a PCBA 7, a battery 71, and the push rod solenoid valve 51 are all located inside the outer shell 1. The outer shell 1 is used for aesthetic purposes and is easy to hold.

As shown in FIG. 5 and FIG. 6, as one form of a vape device mouthpiece structure, the vape device liquid quantity control system further comprises a first sealing material 82 and a first mouthpiece 81. The atomization holder 3 is arranged with a first central air tube 37. The first sealing material 82 is sealed and connected to the liquid tank upper shell 2. A suction hole is arranged within the first sealing material. Two ends of the first central air tube 37 are respectively coupled to the atomization chamber 32 and the bottom of the suction hole. The top of the suction hole is coupled to the first mouthpiece 81. The first sealing material 82 seals the top of the liquid storage chamber 21 and serves as a connection between the first central air tube 37 and the first mouthpiece 81, allowing airflow between the atomization chamber 32 and the first mouthpiece 81.

As shown in FIG. 7 and FIG. 8, as another form of the vape device mouthpiece structure, the vape device liquid quantity control system further comprises a second sealing material 83. The liquid tank upper shell 2 is arranged with a second mouthpiece 22 and a second central air tube 23.

The upper end of the second central air tube 23 is coupled to the second mouthpiece 22. The atomization holder is arranged with an atomization hole 38 coupled to the atomization chamber 32. A suction hole is arranged within the second sealing material 83. Two ends of the second sealing material 83 are respectively connected to the atomization hole 38 and the second central air tube 23. The second mouthpiece 22, the second central air tube 23, and the liquid tank upper shell 2 are integrally formed. The outer wall of the second central air tube 23 and the inner wall of the liquid tank upper shell 2 cooperatively form the liquid storage chamber 21. The inner wall of the second central air tube 23 is connected to the second mouthpiece 22, the second sealing material 83, and the atomization hole 38, so that the atomization chamber 32, the second central air tube 23, and the second mouthpiece 22 form an airflow passage.

The vape device liquid quantity control system further comprises a sealed base shell 9 and an airflow sensor 91. The sealed base shell 9 is connected to the atomization holder 3 and seals the bottom of the atomization chamber 32, and the airflow sensor 91 is connected to the sealed base shell 9. The sealed base shell 9 can seal the bottom of the atomization chamber 32, while the airflow sensor 91 serves as an air vent used for detecting airflow entering the atomization chamber 32 during inhalation. An absorbent member 92 can also be arranged on the sealed base shell 9 for absorbing atomized liquid seeping from the atomization chamber 32, preventing the atomized liquid from leaking onto the electronic components below.

Under normal conditions, the sealing plug 4 is pulled by the restoring spring 55, and the liquid filling hole 33 is in a closed state, ensuring that during production, packaging, transportation, and normal usage, the liquid storage chamber 21 does not leak. When the liquid in the porous liquid-absorbent material 35 is depleted, the circuit detects it and activates the electromagnet 52. At this point, the push rod 53 of the electromagnet 52 overcomes the force of the restoring spring 55, pushing the sealing plug 4 to open, allowing the liquid from the liquid storage chamber 21 to enter the liquid reservoir 31 through the liquid filling hole 33 and replenish the porous liquid-absorbent material 35. After the liquid is refilled, the electromagnet 52 powers off, the push rod 53 resets, and the sealing plug 4 returns to its original sealed position under the force of the restoring spring 55. During the lifecycle of the whole product, the aforementioned process repeats multiple times until all the visible liquid in the liquid storage chamber 21 is fully consumed.

When the vape device is operating and the time for liquid injection is reached, the solenoid control circuit can automatically open the valve of the electromagnet at the same time. After the valve is opened each time and a fixed amount of liquid is filled, the control circuit automatically closes the valve of the electromagnet 52. Through alternating operation of the solenoid of the electromagnet 52, the valve of the electromagnet 52 can be opened and closed to automatically open and close the liquid storage chamber 21, thereby filling the liquid from the liquid storage chamber 21 into the liquid reservoir 31, continuously filling liquid into the interior of the atomization chamber 32. The valve of the electromagnet 52 can also be used to realize different operating modes to meet the needs of different users.

As shown in FIG. 9 and FIG. 10, the vape device liquid quantity control system further comprises a PCBA 7 arranged inside the housing. The PCBA 7 has arranged therein an MCU module and a solenoid control module. A solenoid is wound around the electromagnet 52. The MCU module comprises a chip U2, and the solenoid control module for the electromagnet 52 comprises a MOS transistor Q2, a voltage regulator diode D1, a resistor R13, and a resistor R15. The source of the MOS transistor Q2 is connected to one end of the solenoid M1 and to the negative terminal of the voltage regulator diode D1. Another end of the solenoid M1 and the positive terminal of the voltage regulator diode D1 are grounded. The drain of the MOS transistor Q2 is connected to one end of the resistor R13 and to a BAT+ terminal. The gate of the MOS transistor Q2 is connected to another end of the resistor R13 and to one end of the resistor R15. Another end of the resistor R15 is connected to a PWM2 pin of the chip U2.

When the PWM2 receives a low-level signal from the chip U2, the MOS transistor Q2 is turned on, which means that the solenoid M1 of the electromagnet 52 is powered, and the electromagnet 52 generates magnetic force to lift the sealing plug 4, thereby opening the liquid filling hole 33. When the PWM2 receives a high-level signal from the chip U2, the MOS transistor Q2 is turned off, cutting power to the solenoid M1 of the electromagnet 52, and the magnetic force of the electromagnet 52 disappears. The sealing plug 4 is then pulled down by the elastic force of the restoring spring 55, thereby closing the liquid filling hole 33. The voltage regulator diode D1 is added to prevent the peak voltage generated when switching the solenoid of the electromagnet 52.

As shown in FIG. 9, the vape device liquid quantity control system further comprises the airflow sensor 91 used for detecting airflow. The airflow sensor 91 is coupled to the atomization chamber 32. The MCU module further comprises a resistor R16. A MIC Out pin of the chip U2, the resistor R16, and the airflow sensor 91 are connected in series in that order. When a user inhales through the mouthpiece, the airflow sensor 91 generates an air pressure change, and at this time, the airflow sensor 91 senses a signal and outputs the signal through the MIC Out pin to the chip U2. The chip U2 controls the heating element 34 to power on or power off based on the signal of the airflow sensor 91. In FIG. 7, MIC1 refers to the airflow sensor 91.

A process by which the MCU module controls the opening or closing of the liquid filling hole 33 is as follows:

• • a1. When the vape device is not in use, the PWM2 pin of the chip U2 outputs a high-level signal, the MOS transistor Q2 is turned off, the solenoid is unpowered, the electromagnet 52 loses magnetic force, and the restoring spring 55 pulls the sealing plug 4 down to close the liquid filling hole 33;
  • a2. When the vape device is in use, the airflow sensor 91 triggers a signal, and the chip U2 begins counting the usage time. When a preset usage duration set by the chip U2 is reached, the chip U2 outputs a low-level signal through the PWM2 pin, the MOS transistor Q2 is turned on, the solenoid is powered, and the electromagnet 52 generates upward magnetic force, and the push rod 53 and the connecting rod 54 push the sealing plug 4 to open the liquid filling hole 33;
  • a3. The chip U2 begins counting the time that the sealing plug 4 remains open. When a preset opening duration set by the chip U2 is reached, the PWM2 pin of the chip U2 switches to output a high-level signal, the MOS transistor Q2 is turned off, the solenoid is powered, and the electromagnet 52 loses magnetic force, and the restoring spring 55 pulls the sealing plug 4 downward to close the liquid filling hole 33.

There is a PCBA 7 inside the electronic vape device. The MCU module in the PCBA 7 is controlled by software algorithms and calculates a smoking duration of the user. After 50-80 seconds of smoking, the circuit controls the electromagnetic valve to open the sealing plug 4, allowing the liquid to enter the refill chamber and replenish the liquid. After 10-20 seconds of opening, the electromagnetic valve is closed to stop refilling and prevent overfilling and leakage. The 50-80 seconds is the preset duration for opening the liquid filling hole 33, calculated from the moment the airflow sensor 91 detects a change in air pressure during inhalation through the mouthpiece. By the time 50-80 seconds has passed, the heating element 34 will have consumed some of the liquid in the porous liquid-absorbent material 35 and the liquid reservoir 31, so refilling at this point is optimal. Based on the refilling speed, it takes about 10-20 seconds to fill the liquid reservoir 31 and the porous liquid-absorbent material 35, so the liquid filling hole 33 is closed after this time.

As shown in FIG. 11, the PCBA 7 further comprises a heating element control module, the heating element control module comprising a MOS transistor Q1, a resistor R9, a resistor R10, and a resistor R12. The source of the MOS transistor Q1 is connected to one end of the resistor R10 and one end of the heating element 34, and another end of the heating element 34 is grounded. Another end of the resistor R10 is connected to a VDCDC_READ pin of the chip U2. The drain of the MOS transistor Q1 is connected to one end of the resistor R9 and to the BAT+ terminal. The gate of the MOS transistor Q1 is connected to another end of the resistor R9 and to one end of the resistor R12, and another end of the resistor R12 is connected to a PWM1 pin of the chip U2. In FIG. 8, BAT2 refers to the battery 71. The VDCDC_READ of the chip U2 is used for detecting the output of the MOS transistor Q1. The chip U2 controls the MOS transistor Q1 to turn on or turn off through the PWM1, thereby powering on or powering off the heating element 34. In FIG. 9, F1 refers to the heating element 34.

The vape device liquid quantity control system further comprises the battery 71 arranged within the housing. The positive terminal of the battery 71 is connected to the BAT+ terminal, and the negative terminal of the battery 71 is grounded. The battery 71 provides power to the heating element 34, the solenoid coil of the electromagnet 52, and the MCU module through the BAT+ terminal.

To achieve better control results, the operating frequency and power-on duration of the solenoid coil of the electromagnet 52 are related to the power of the heating element 34, the liquid storage capacity of the porous liquid-absorbent material 35, and other factors. Therefore, depending on different designs and practical applications, these parameters can be reasonably adjusted for the operating frequency and duration of the solenoid coil of the electromagnet 52, thus ensuring that the heating element 34 does not dry burn and that the liquid storage capacity of the porous liquid-absorbent material 35 is sufficient, avoiding liquid leakage caused by excessive refueling.

As shown in FIG. 12, the vape device liquid quantity control system further comprises a charging port 72. The PCBA 7 further comprises a charging module. The charging module comprises a chip U1. Pin 4 of the chip U1 is connected to the charging port 72, pin 5 of the chip U1 is connected to a 5V READ pin of the chip U2, pin 1 of the chip U1 is connected to a C CHECK pin of the chip U2, and pin 3 of the chip U1 is connected to the BAT+ terminal. In FIG. 10, J1 indicates the charging port 72.

As shown in FIG. 13, the PCBA 7 further comprises a gyroscopic acceleration sensor module. The gyroscopic acceleration sensor module comprises a chip U3. Pin 12, pin 2, pin 5, and pin 6 of the chip U3 are respectively connected to a SCL pin, SDA pin, INT1 pin, and INT2 pin of the chip U2.

A process by which the gyroscopic acceleration sensor module controls the opening or closing of the liquid filling hole is as follows:

• • b1. When the chip U3 detects that a tilt angle of the vape device is greater than a set tilt angle, the chip U3 sends a tilt signal to the chip U2 through the SCL, SDA, INT1, and INT2 pins. The PWM2 pin of the chip U2 outputs a high-level signal, the MOS transistor Q2 is turned off, the solenoid is powered off, the electromagnet 52 loses magnetic force, and the restoring spring 55 drives the sealing plug 4 downward to close the liquid filling hole 33;
  • b2. When the electronic vape device is placed upright or the tilt angle is less than the set tilt angle, the chip U3 stops sending the signal to the chip U2.

The chip U3 of the gyroscopic detector is added. The chip U3 is connected to the MCU through the SCL, SDA, INT1, and INT2 for communication. When the chip U3 detects that the tilt angle of the e-cigarette is too large, the MOS transistor Q2 is turned off, causing the sealing plug 4 to descend and thus close the liquid filling hole 33. This is because when the liquid filling hole 33 is open when the electronic vape device is lying down or the mouthpiece is facing downward, the liquid has no way to fill the porous liquid-absorbent material 35. Only when the electronic vape device is placed upright or tilted at a small angle (e.g., a set angle less than 45°) can opening the liquid filling hole 33 allow the liquid to fill the porous liquid-absorbent material 35.

As shown in FIG. 14, a determination process for opening and closing the liquid filling hole 33 in the present application is as follows:

• • S1. The MCU module detects through the VDCDC_READ of the chip U2 whether the heating element 34 has stopped operating. If it is still operating, the process ends. If it has stopped operating, S2 is implemented;
  • S2. Whether the time to open the liquid filling hole 33 has been reached is determined. If this time requirement has not been reached, the MOS transistor Q2 is kept in an off state, and the process ends. If this time requirement has been reached, S3 is implemented;
  • S3. Whether the tilt angle detected by the gyroscope exceeds the set value is determined. If the set value has not been reached, the MOS transistor Q2 is kept in an off state, and the process ends. If the value has been reached, the MOS transistor Q2 is switched on;
  • S4. Whether the liquid has been filled is determined. In other words, whether a liquid refilling time has reached a set time is determined. If not yet reached, S3 is repeated. If reached, the MOS transistor Q2 is turned off, and the process ends.

A specific circuit signal process in the aforementioned determination process is as follows:

• • (1) Circuit state when the liquid filling hole 33 is closed: When the heating element 34 is operating, the heating element 34 operates when the MCU module receives the trigger signal from MIC1 of the airflow sensor 91 through pin 1 of the chip U2, and controls the MOS transistor Q1 to turn on through PWM1, supplying power to the heating element 34. VDCDC_READ of the chip U2 is used for detecting the output of the MOS transistor Q1. When the solenoid controller system outputs a high-level signal through the PWM2 pin of the chip U2 and the MOS transistor Q2 is turned off, the solenoid M1 is not powered. Therefore, the electromagnet 52 has no magnetic force, the sealing plug 4 is pressed against the liquid filling hole 33 under the force of the restoring spring 55, and the liquid filling hole 33 is closed.
  • (2) Circuit state when the liquid filling hole 33 is open: After the heating element 34 stops operating, the trigger signal from MIC1 of the airflow sensor 91 stops, and the MOS transistor Q1 is turned off. The MCU module detects whether the operating time of the heating element 34 has reached the set time. This time is set by software in the MCU module. Then, the chip U2 of the MCU module outputs a low-level signal through the PWM2 pin, the MOS transistor Q2 is turned on, the solenoid M1 is powered, and the electromagnet 52 generates an upward magnetic force. Under the magnetic force, the push rod, the connecting rod 54, and the sealing plug 4 are lifted upward, opening the liquid filling hole 33 and allowing the liquid in the liquid storage chamber 21 to flow into the liquid reservoir 31, supplying liquid to the porous liquid-absorbent material 35. When the liquid filling time reaches the set value, the chip U2 outputs a high-level signal again through the PWM2 pin, the MOS transistor Q2 is turned off, the electromagnet 52 has no magnetic force, and the sealing plug 4 under the force of the restoring spring 55 returns the liquid filling hole 33 to a closed state.

The present application integrates the electromagnet solenoid with the main body of the vape device product. During use of the product, the switching process of the electromagnetic solenoid valve is smooth and gentle, so the overall product use effect is better, and the noise generated is very low, which does not cause noise impact on the user. At the same time, by using an electromagnetic valve, liquid can be tightly locked inside the sealed liquid storage chamber 21, avoiding many liquid leakage situations caused by the environment. Since the product uses the solenoid valve to control the liquid inlet, the timing and amount of liquid input can be controlled, greatly improving the usage effect, bringing a different experience to the user, and further enhancing the user experience. Additionally, waste of liquid cups caused by insufficient one-time refilling is reduced, reducing environmental pollution.

The aforementioned contents combine specific preferred embodiments to further describe the present application in detail, and the specific implementations of the present application should not be regarded as limited to these descriptions only. For those of ordinary skill in the art of the present application, several simple inferences or substitutions can still be made without departing from the concept of the present application, and all should be considered within the scope of protection of the present application.