CN116138514A

CN116138514A - Airflow sensing device, power supply device and electronic atomization device

Info

Publication number: CN116138514A
Application number: CN202111390019.8A
Authority: CN
Inventors: 周亮德; 邓泽文
Original assignee: Shenzhen Smoore Technology Ltd
Current assignee: Shenzhen Smoore Technology Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-23

Abstract

The invention relates to an airflow sensing device, a power supply device and an electronic atomization device, wherein the airflow sensing device comprises a containing cavity, at least one fan blade rotatably contained in the containing cavity, at least one magnetic element which is arranged on the at least one fan blade and can synchronously rotate along with the at least one fan blade, and at least one magnetic inductor for sensing the magnetic field change of the at least one magnetic element. The invention realizes the detection of the air flow through the non-contact transmission of the magnetic field, and the air flow does not need to pass through any electronic component, so that condensate and atomized liquid can not enter the electronic component, and the abnormal function and failure of the electronic component caused by the leakage of the condensate and the atomized liquid are avoided.

Description

Airflow sensing device, power supply device and electronic atomization device

Technical Field

The invention relates to the field of atomization, in particular to an airflow sensing device, a power supply device and an electronic atomization device.

Background

Prior art electronic atomizing devices typically employ an airflow sensor to detect and sense changes in the suction airflow to determine whether to activate the electronic atomizing device. At present, most of air flow sensors adopt a microphone, a silicone microphone, a differential pressure sensor and the like, and the air flow needs to be in direct physical contact with the air flow, so that the air flow can pass through the air flow sensor, and leaked condensate and atomized liquid can flow into the air flow sensor through an air passage and then be conducted to the whole circuit board. Due to the conductivity of condensate and atomized liquid, electronic components on the circuit board can fail, thereby causing abnormal functions or functional failure.

Disclosure of Invention

The present invention is directed to an improved airflow sensing device, and a power supply device and an electronic atomizing device having the airflow sensing device, which address the above-mentioned drawbacks of the prior art.

The technical scheme adopted for solving the technical problems is as follows: an airflow sensing device is constructed and used for an electronic atomization device, and comprises a containing cavity, at least one fan blade rotatably contained in the containing cavity, at least one magnetic element which is arranged on the at least one fan blade and can synchronously rotate along with the at least one fan blade, and at least one magnetic inductor for sensing the magnetic field change of the at least one magnetic element.

In some embodiments, the at least one magnetic sensor is capable of sensing a change in a magnetic field of the at least one magnetic element to generate a pulse signal when the at least one magnetic element rotates synchronously with the at least one fan blade.

In some embodiments, the magnetic sensor is a switch hall.

In some embodiments, the magnetic sensor is a linear hall.

In some embodiments, the airflow sensing device comprises at least two blades.

In some embodiments, the airflow sensing device further comprises an air inlet channel and an air outlet channel in communication with the receiving cavity.

In some embodiments, when the number N of the fan blades is greater than or equal to 3, the included angle between the air inlet channel and the air outlet channel ranges from 360 degrees/N to 180 degrees.

In some embodiments, when the number of the fan blades n=2, the included angle between the air inlet channel and the air outlet channel ranges from 90 degrees to 180 degrees.

In some embodiments, the magnetic element is embedded in the fan blade.

In some embodiments, the magnetic element is a magnet.

In some embodiments, the at least one magnetic inductor is disposed outside the receiving cavity.

In some embodiments, there are at least two of the magnetic inductors.

In some embodiments, at least two of the magnetic sensors are spaced apart along the direction of rotation of the magnetic element.

In some embodiments, the airflow sensing device further comprises an MCU electrically connected to at least two of the magnetic sensors, the MCU being configured to determine whether to perform an air blowing or air suction operation by determining the sequence in which signals are received by the at least two magnetic sensors.

In some embodiments, the airflow sensing device further comprises a circuit board electrically connected to the at least one magnetic inductor.

In some embodiments, the at least one magnetic inductor is disposed independently of the circuit board.

In some embodiments, the airflow sensing device includes a bracket assembly, and the receiving cavity is formed on the bracket assembly.

In some embodiments, the airflow sensing device further comprises a rotating shaft, and the at least one fan blade is rotatably installed in the accommodating cavity through the rotating shaft.

The invention also provides a power supply device comprising an airflow sensing device as claimed in any one of the preceding claims.

The invention also provides an electronic atomizing device, which comprises the power supply device and an atomizer electrically connected with the power supply device.

The implementation of the invention has at least the following beneficial effects: the airflow sensing device realizes the detection of the airflow through the non-contact transmission of the magnetic field, and the airflow does not need to pass through any electronic component, so that condensate and atomized liquid cannot enter the electronic component, and the abnormal function and failure of the electronic component caused by the leakage of the condensate and the atomized liquid are avoided.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic perspective view of an airflow sensing device according to some embodiments of the invention;

FIG. 2 is a schematic cross-sectional view of the airflow sensing device shown in FIG. 1;

FIG. 3 is an exploded view of the airflow sensing device shown in FIG. 1;

FIG. 4 is a simulation of the magnetic field strength received by the magnetic sensor as the magnetic element rotates;

FIG. 5 is a functional block diagram of an electronic atomizing device control circuit in some embodiments of the present disclosure;

fig. 6 is a schematic perspective view of an electronic atomizing device according to some embodiments of the present invention.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or those conventionally placed in use of the present invention product are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Fig. 1-3 illustrate an air flow sensing device 1 according to some embodiments of the present invention, where the air flow sensing device 1 may be used in an electronic atomizing device to sense a change in suction air flow to determine whether to start the electronic atomizing device for atomizing. The airflow sensing device 1 may include a bracket assembly 10 formed with a receiving cavity 110, at least one fan blade 20 rotatably disposed in the receiving cavity 110, at least one magnetic element 30 disposed on the at least one fan blade 20 and rotatable synchronously with the at least one fan blade 20, at least one magnetic sensor 50 for sensing a magnetic field variation of the at least one magnetic element 30, and a circuit board 60 electrically connected to the at least one magnetic sensor 50. The air flow sensing device 1 of the present invention adopts a windmill type structural design, when a user sucks, a negative pressure is formed in the accommodating cavity 110, and the fan blades 20 are pushed to rotate under the action of the negative pressure, so as to drive the magnetic element 30 to rotate, thereby generating a magnetic field change, and the magnetic sensor 50 senses the magnetic field change of the magnetic element 30 to generate a control signal.

The stand assembly 10 may be made of a PC material, and may include a stand body 11 and a cover 12, and the receiving cavity 110 may be formed on the stand body 11. In this embodiment, the accommodating cavity 110 has a cylindrical shape with one side open, and the cover plate 12 has a circular plate shape and covers the opening of the accommodating cavity 110. The bracket body 11 may further be formed with an inlet channel 111 and an outlet channel 112 respectively communicating with the receiving chamber 110. The air inlet channel 111, the accommodating cavity 110 and the air outlet channel 112 are sequentially communicated to form an air flow channel through which air flows.

The fan blade 20 may be made of PC material, and the fan blade 20 may be a flat fan blade, or may be a fan blade with an arc. In general, the number of the fan blades 20 may be two or more, and the two or more fan blades 20 may be uniformly spaced apart in the circumferential direction. Preferably, when the number N of the fan blades 20 is n=2, the included angle between the air inlet channel 111 and the air outlet channel 112 can be between 90 degrees and 180 degrees. When the number N of the fan blades 20 is N being more than or equal to 3, the included angle between the air inlet channel 111 and the air outlet channel 112 can be between 360 degrees/N and 180 degrees.

The airflow sensing device 1 may further include a rotating shaft 40, and the at least one fan blade 20 may be rotatably disposed in the accommodating cavity 110 through the rotating shaft 40. The rotating shaft 40 may be coaxially disposed with the accommodating cavity 110, and the at least one fan blade 20 may rotate about a center line of the rotating shaft 40 as a rotation center. In some embodiments, the rotating shaft 40 may be fixedly mounted on the bracket body 11, and the at least one fan blade 20 may be rotatably sleeved on the rotating shaft 40. In other embodiments, the rotating shaft 40 may be rotatably mounted on the bracket body 11, and the at least one fan blade 20 may be fixedly sleeved on the rotating shaft 40.

The magnetic element 30 may be a magnet, which may be embedded in the fan blade 20. It should be understood that the structures of the fan blade 20 and the magnetic element 30 are not limited to the above-mentioned manner, and only the magnetic element 30 can be rotated by the rotation of the fan blade 20 to generate the magnetic field change.

In this embodiment, the magnetic sensor 50 and the circuit board 60 can be disposed outside the accommodating cavity 110. The electronic components such as the magnetic inductor 50, the circuit board 60 and the like are completely isolated from the air flow channel, the detection of the air flow is completely from the non-contact transmission of the magnetic field, and the air flow does not need to pass through any electronic component, so that condensate and atomized liquid cannot enter the electronic component, and the abnormal function and failure of the electronic component caused by the leakage of the condensate and the atomized liquid are avoided. In some embodiments, the magnetic sensor 50 may be provided separately from the circuit board 60. In the present embodiment, the circuit board 60 may be mounted on the bracket body 11 by screws. The magnetic sensor 50 is disposed between the cover plate 12 and the circuit board 60, and may be mounted on the circuit board 60 or may be mounted on the cover plate 12.

Preferably, the magnetic sensor 50 can be a switch Hall, and only needs to sense 0 and 1 in one period, so that the cost is saved. When a user sucks, a negative pressure is formed in the accommodating cavity 110, the fan blade 20 is pushed to rotate under the action of the negative pressure, when the magnetic element 30 embedded in the fan blade 20 is close to the magnetic sensor 50, the magnetic field intensity received by the magnetic sensor 50 is increased, so that the magnetic sensor 50 is triggered to output an effective level, and when the magnetic element 30 embedded in the fan blade 20 is far away from the magnetic sensor 50, the magnetic field intensity received by the magnetic sensor 50 is decreased, so that the magnetic sensor 50 is triggered to output an ineffective level. By adopting the pulse signal as the control signal to control the operation of related components such as the heating element and the like, the reliability is higher, and the false triggering of signals caused by a strong magnetic field and the like can be avoided.

Fig. 4 shows a simulation of the magnetic field strength received by the magnetic sensor 50 when the magnetic element 30 rotates, and it can be seen from this graph that the magnetic element 30 reaches the magnetic field threshold of the magnetic sensor 50 when approaching the magnetic sensor 50, and the magnetic sensor 50 can generate a pulse level by selecting an appropriate magnetic field threshold.

The air flow sensing device 1 further comprises an MCU, which may be integrated on the circuit board 60. The MCU is electrically connected to the at least one magnetic sensor 50, and the high-low pulse signal output by the magnetic sensor 50 is sent to the MCU for processing, and the MCU determines whether to start the related electronic components such as the heating element according to the high-low pulse signal. Preferably, there are at least two magnetic sensors 50, and the at least two magnetic sensors 50 may be substantially spaced apart along the rotation direction of the magnetic element 30. The at least two magnetic sensors 50 are respectively electrically connected with the MCU, and the MCU can judge whether to blow or inhale the air through judging the sequence of the signals received by the at least two magnetic sensors 50, so that the anti-blowback detection is realized.

It will be appreciated that in other embodiments, the magnetic sensor 50 may also be a linear hall. Preferably, at least two linear hall devices are arranged, and whether the air blowing or the air suction action is performed can be judged by judging the sequence of signals received by the at least two linear hall devices, so that the back blowing prevention detection is realized.

Fig. 5 illustrates a functional block diagram of an electronic atomizing device control circuit in some embodiments of the present disclosure, wherein a battery 70 is coupled to a heating element 90 for supplying power to the heating element 90. The switch circuit 80 is connected between the battery 70 and the heating element 90 to form a power supply loop for controlling the on-off of the power supply loop. The MCU is connected to the switch circuit 80 and the two magnetic sensors 50, respectively, and determines whether to perform an air blowing or an air sucking operation by determining the sequence in which the two magnetic sensors 50 receive signals, thereby controlling the switch circuit 80 to be turned on or off. When the switch circuit 80 is turned on, the power supply circuit is conducted to form a conductive path, so that the battery 70 supplies power to the heating element 90. The switching circuit 80 may cause the power supply circuit to be opened when it is opened, thereby causing the battery 70 to stop supplying power to the heating element 90.

Fig. 6 illustrates an electronic atomizing device, which in this embodiment is generally elliptical and columnar, in some embodiments of the present invention, and may include a power supply device 100 and an atomizer 200 removably disposed above the power supply device 100 in a longitudinal direction. The atomizer 200 may include an atomization housing 201 and a heating element 90 disposed in the atomization housing 201. The atomization shell 201 is internally provided with a liquid storage cavity for containing atomized liquid, and the heating element 90 is communicated with the liquid storage cavity and can heat and atomize the atomized liquid after being electrified. The power supply device 100 is used for supplying power to the heating element 90 and controlling the operation of electronic components such as the heating element 90, and may include a housing 101, and a battery 70 and a gas flow sensing device 1 disposed in the housing 101. It should be understood that the electronic atomizer device is not limited to be in an oval column shape, but may be in other shapes such as a column shape, a square column shape, a flat column shape, etc., and the atomizer 200 and the power supply device 100 may be connected together in a non-detachable manner.

It will be appreciated that the above technical features may be used in any combination without limitation.

The foregoing examples only illustrate preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. An air flow induction device for an electronic atomizing device is characterized in that the air flow induction device (1) comprises a containing cavity (110), at least one fan blade (20) rotatably contained in the containing cavity (110), at least one magnetic element (30) which is arranged on the at least one fan blade (20) and can synchronously rotate along with the at least one fan blade (20), and at least one magnetic inductor (50) for inducing the magnetic field change of the at least one magnetic element (30).

2. The airflow sensing device according to claim 1, wherein the at least one magnetic sensor (50) is capable of sensing a change in a magnetic field of the at least one magnetic element (30) to generate a pulse signal when the at least one magnetic element (30) rotates synchronously with the at least one fan blade (20).

3. The airflow sensing device according to claim 2, characterized in that the magnetic sensor (50) is a switch hall.

4. The airflow sensing device according to claim 1, characterized in that the magnetic sensor (50) is a linear hall.

5. The airflow sensing device according to claim 1, characterized in that the airflow sensing device (1) comprises at least two fan blades (20).

6. The airflow sensing device according to claim 1, further comprising an air inlet channel (111) and an air outlet channel (112) in communication with the receiving cavity (110).

7. The airflow sensing device according to claim 6, wherein when the number N of the fan blades (20) is greater than or equal to 3, the included angle between the air inlet channel (111) and the air outlet channel (112) ranges from 360 degrees/N to 180 degrees.

8. The airflow sensing device according to claim 6, wherein when the number n=2 of the fan blades (20), the included angle between the air inlet channel (111) and the air outlet channel (112) ranges from 90 degrees to 180 degrees.

9. The airflow sensing device according to any one of claims 1-8, characterized in that the magnetic element (30) is embedded in the fan blade (20).

10. An air flow sensing device according to any of claims 1-8, characterized in that the magnetic element (30) is a magnet.

11. The airflow sensing device according to any one of claims 1-8, characterized in that the at least one magnetic inductor (50) is arranged outside the receiving cavity (110).

12. The airflow sensing device according to any one of claims 1-8, characterized in that there are at least two of said magnetic inductors (50).

13. The air flow sensing device according to claim 12, characterized in that at least two of the magnetic inductors (50) are spaced apart along the direction of rotation of the magnetic element (30).

14. The airflow sensing device according to claim 12, further comprising an MCU electrically connected to at least two of the magnetic sensors (50), the MCU being adapted to determine whether an air blowing or air sucking action is performed by determining the sequence in which signals are received by at least two of the magnetic sensors (50).

15. The air flow sensing device according to any one of claims 1-8, further comprising a circuit board (60) electrically connected to the at least one magnetic inductor (50).

16. The air flow sensing device according to claim 15, wherein the at least one magnetic inductor (50) is provided independently of the circuit board (60).

17. An air flow sensing device according to any one of claims 1-8, characterized in that the air flow sensing device comprises a bracket assembly (10), the receiving cavity (110) being formed on the bracket assembly (10).

18. The airflow sensing device according to any one of claims 1-8, further comprising a shaft (40), wherein the at least one fan blade (20) is rotatably mounted in the housing cavity (110) via the shaft (40).

19. A power supply device, characterized by comprising an air flow sensing device (1) according to any one of claims 1-18.

20. An electronic atomizing device comprising the power supply device of claim 19 and an atomizer electrically connected to the power supply device.