CN113243572A

CN113243572A - Electronic cigarette pressure sensor and electronic cigarette

Info

Publication number: CN113243572A
Application number: CN202110573866.1A
Authority: CN
Inventors: 黄高东; 石秀红
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-08-13
Also published as: WO2022247074A1

Abstract

The invention discloses an electronic cigarette air pressure sensor and an electronic cigarette, wherein the sensor comprises a shell, a circuit board, an ASIC chip and an air pressure sensing element, wherein a first air hole is formed in the circuit board, the air pressure sensing element comprises a base and a piezoelectric film, the base forms an air cavity, and the first air hole is communicated with the air cavity; the piezoelectric film gradually inclines from the connecting end with the base to the direction far away from the air cavity; the shell is welded with the circuit board through solder paste, the piezoelectric film is connected with the ASIC chip through a lead, the ASIC chip is bonded and fixed with the circuit board, and the first air holes and the second air holes are staggered. Compared with the prior art, this application can be fine prevent that oil or water droplet from falling on piezoelectric film surface and the mistake produces the defect of signal of telecommunication, has promoted baroceptor's reliability.

Description

Electronic cigarette pressure sensor and electronic cigarette

Technical Field

The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette pressure sensor and an electronic cigarette.

Background

The electronic cigarette is novel electronic equipment for a user to use the cigarette liquid after atomization through the atomizer, and substances such as tar and the like which harm the body are removed when the cigarette liquid is manufactured, so that harm to the human body is eliminated. The existing electronic cigarette mainly comprises a battery component, a core control component, an atomizer component and an air pressure sensor which are fixedly connected in sequence, the electronic cigarette is affected by the problem of structural design, condensate often flows back to the electronic smoke pressure sensor after the atomization of tobacco tar, the existing electronic cigarette air pressure sensor mostly adopts a capacitance sensor which mainly causes the deformation of a PPS (polyphenylene sulfide) vibrating diaphragm inside the sensor through airflow flowing into a cavity, so that the relative distance and the relative area between the PPS vibrating diaphragm (SW) and a back pole plate (GND) are changed, the capacitance of the SW to the GND is finally changed, a rear-end data processing chip judges whether a user inhales through the detection of the capacitance variation, the condensate flows back to the PPS vibrating diaphragm, the capacitance variation is easy to generate abnormity, and the rear-end data processing chip cannot acquire accurate data, thereby causing the start failure of the electronic cigarette. Therefore, how to design an electronic cigarette pressure sensor capable of preventing oil and water is an urgent technical problem to be solved in the industry.

Disclosure of Invention

The invention provides an electronic cigarette air pressure sensor and an electronic cigarette, and solves the problem that the reliability of the air pressure sensor is poor due to poor waterproof and oilproof capabilities of the electronic cigarette in the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides an electronic flue gas pressure sensor, is including having the open-ended shell, the lid is located circuit board on the shell opening is located ASIC chip on the inside circuit board of shell is located on the circuit board and with the atmospheric pressure sensing element that ASIC chip electricity is connected, be equipped with first gas pocket on the circuit board, atmospheric pressure sensing element include with the air cavity of first gas pocket intercommunication with locate at least a slice mobilizable piezoelectric film of air cavity one end, the shell with the one end that the circuit board is relative is equipped with the second gas pocket.

Furthermore, the air pressure sensing element comprises a base, an annular air cavity is formed by surrounding the base, one end of the base is fixedly bonded at the first air hole on the circuit board, and the piezoelectric film is fixedly arranged at the other end of the base.

Furthermore, the air pressure sensing element is provided with four piezoelectric films, one end of each piezoelectric film is connected with the base, and the piezoelectric films shield the air cavity.

Further, the piezoelectric film is gradually inclined from the connecting end with the base towards the direction away from the air cavity.

Furthermore, the cross section of the base is rectangular, the piezoelectric film is triangular, each side edge of the base is connected with one piezoelectric film, the edge of each piezoelectric film is connected with the side edge of the base, and the sharp-angled end of each piezoelectric film faces the direction of the central line of the base.

Furthermore, the shell and the circuit board are welded through solder paste.

Further, the piezoelectric film and the ASIC chip are connected through a wire.

Further, the ASIC chip is fixedly bonded with the circuit board.

Further, the first air hole and the second air hole are staggered with each other.

An electronic cigarette, the electronic cigarette comprises the air pressure sensor.

Compared with the prior art, the air pressure sensing element adopts the piezoelectric film, the film can generate an electric signal only by being pressed by continuous air flow, and when the film is in a static state or a static state with liquid and oil, the piezoelectric material does not generate the electric signal; compared with the conventional technology, this application can be fine prevent oil or water droplet from dropping on piezoelectric film surface and the mistake produces the defect of signal of telecommunication, has promoted baroceptor's reliability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic cross-sectional view of an air pressure sensor according to the present invention;

fig. 2 is a schematic view of a structure of a gas pressure sensor in a plan view according to the present invention.

1. A housing; 2. a circuit board; 3. an ASIC chip; 4. an air pressure sensing element; 41. a piezoelectric film; 42. a base; 5. a first air hole; 6. a second air hole; 7. a wire; 8. tin paste; 9. resin glue; 10. silica gel.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.

The application provides an air pressure sensor of an electronic cigarette, which mainly comprises a shell 1, a circuit board 2, an ASIC chip 3 and an air pressure sensing element 4, as shown in figure 1.

The shell 1 is a round cover-shaped shell, an opening is formed in the lower end of the shell, and the circuit board 2 is fixed at the opening below the shell in a welding mode through solder paste 8; the circuit board 2 is also provided with an ASIC chip 3, wherein the ASIC chip 3 is fixedly bonded with the circuit board 2 through a resin adhesive 9, and the ASIC chip 3 is positioned in the shell 1; the air pressure sensing element 4 is fixed on the circuit board 2 by the silica gel 10, and is also arranged inside the shell 1.

The difference between this application and the prior art lies in, having carried out the adaptive change to atmospheric pressure sensing element 4 in this application, atmospheric pressure sensing element 4 among the conventional art generally uses capacitive sensing element, and atmospheric pressure sensing element 4 in this application adopts piezoelectric sensing element, and it specifically includes: the base 42 is a square cylinder surrounded by four side walls, the upper end and the lower end of the base 42 are communicated to form an air cavity, the upper end of the base 42 is provided with a piezoelectric film 41, the piezoelectric film 41 covers the end part of the air cavity, one end of the piezoelectric film 41 is fixedly connected with the base 42, and the other end of the piezoelectric film 41 is movably arranged, so that the piezoelectric film 41 can deform under the action of force; the circuit board 2 is provided with a first air hole 5, the base 42 is arranged at the first air hole 5 on the circuit board 2, the lower end of the air cavity of the base 42 is communicated with the first air hole 5, and the upper end (the end opposite to the circuit board 2) of the shell 1 is provided with a second air hole 6, thereby forming an air circulation path inside the shell 1, when air is sucked, air flows from bottom to top to drive the piezoelectric film 41 to deform, because of the material property of the piezoelectric film 41, the piezoelectric material integrated on the surface of the silicon film is used for energy conversion, when the film is pressed by continuous air flow, the film deforms and drives the piezoelectric material to deform, the piezoelectric film 41 is connected with the ASIC chip 3 through a lead 7, when the physical property of the piezoelectric material changes, the piezoelectric material can generate electric signal output and transmit the electric signal to the ASIC chip 3, and when the film is in a static state, the piezoelectric material does not generate an electrical signal.

Because the air pressure sensing element 4 provided by the application adopts the piezoelectric film 41, the film can generate an electric signal only by being pressed by continuous air flow, and when the film is in a static state or a static state with liquid and oil, the piezoelectric material does not generate the electric signal; compared with the conventional technology, the air pressure sensor has the advantages that the defect that oil or water drops fall on the surface of the piezoelectric film 41 to generate electric signals by mistake can be well overcome, and the reliability of the air pressure sensor is improved.

Specifically, as shown in fig. 2, four piezoelectric films 41 are specifically arranged in the present application, the cross section of the base 42 is rectangular, each piezoelectric film 41 is triangular, each piezoelectric film 41 has the same shape, the edge of the triangular piezoelectric film 41 is fixed to the side of the base 42, and the pointed end of the corresponding triangular piezoelectric film 41 extends toward the center line of the base 42, so that the four piezoelectric films 41 are spliced with each other, and a gap is formed between each piezoelectric film 41 and the piezoelectric film 41, so that the sensitivity of the piezoelectric film 41 can be greatly improved, and as long as a user inhales, the deformation can be sensed and generated, and a reliable electrical signal is provided.

Preferably, the piezoelectric film 41 in the present application is gradually inclined from the connection end with the base 42 toward the direction away from the air cavity, and the portion of the piezoelectric film 41 located at the center of the air cavity is protruded in a mountain top shape when viewed from the side, so that the air can flow from bottom to top conveniently, and the sensitivity of the air pressure sensing element 4 is also improved.

Preferably, the ASIC chip 3 and the piezoelectric film 41 are electrically connected using gold wires in the present application.

Preferably, first air vent 5 and second air vent 6 in this application stagger each other, and second air vent 6 sets up in the position relative with ASIC chip 3, and the circulation route of the gas that can effectively prolong like this reduces the degree of difficulty of breathing in, makes the action of breathing in of electron cigarette more approximate real smoking state, promotes user experience.

In order to improve the air suction experience, the air chamber of the pedestal 42 may be specially configured, such as being curved to extend the airflow path.

The application also provides an electronic cigarette, which comprises the air pressure sensor.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an electronic flue gas pressure sensor, is including having open-ended shell (1), the lid is located circuit board (2) on shell (1) opening is located ASIC chip (3) on circuit board (2) inside shell (1), locate on circuit board (2) and with atmospheric pressure sensing element (4) that ASIC chip (3) electricity is connected, its characterized in that, be equipped with first gas pocket (5) on circuit board (2), atmospheric pressure sensing element (4) including with the air cavity of first gas pocket (5) intercommunication with locate the mobilizable piezoelectric film (41) of at least a slice of air cavity one end, shell (1) with the one end that circuit board (2) is relative is equipped with second gas pocket (6).

2. The electronic cigarette pressure sensor according to claim 1, wherein the pressure sensing element (4) comprises a base (42), the base (42) surrounds an annular air cavity, one end of the base (42) is bonded and fixed to a first air hole (5) on the circuit board (2), and the piezoelectric film (41) is fixed to the other end of the base (42).

3. The electronic smoke pressure sensor according to claim 2, wherein said pressure sensing element (4) is provided with four piezoelectric films (41), one end of said piezoelectric film (41) is connected to said base (42), and said piezoelectric film (41) shields said air cavity.

4. An electronic smoke pressure sensor according to claim 3, wherein said piezoelectric film (41) is gradually inclined from the end connected to said base (42) towards a direction away from said air cavity.

5. The electronic smoke pressure sensor according to claim 3, wherein said base (42) has a rectangular cross section, said piezoelectric film (41) has a triangular cross section, each side of said base (42) is connected with a piece of said piezoelectric film (41), the edge of said piezoelectric film (41) is connected with the side of said base (42), and the tip end of said piezoelectric film (41) is arranged toward the center line of said base (42).

6. The electronic smoke pressure sensor according to claim 1, wherein said housing (1) and said circuit board (2) are soldered together by means of a solder paste (8).

7. The electronic smoke pressure sensor according to claim 1, wherein a piezoelectric film (41) is connected to said ASIC chip (3) by a wire (7).

8. The electronic smoke pressure sensor according to claim 1, wherein said ASIC chip (3) is adhesively secured to said circuit board (2).

9. The electronic smoke pressure sensor of claim 1, wherein said first air hole (5) and said second air hole (6) are staggered with respect to each other.

10. An electronic cigarette, characterized in that it comprises a barometric pressure sensor according to any of claims 1 to 9.