WO2022247074A1 - 电子烟气压传感器及电子烟 - Google Patents

电子烟气压传感器及电子烟 Download PDF

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Publication number
WO2022247074A1
WO2022247074A1 PCT/CN2021/119976 CN2021119976W WO2022247074A1 WO 2022247074 A1 WO2022247074 A1 WO 2022247074A1 CN 2021119976 W CN2021119976 W CN 2021119976W WO 2022247074 A1 WO2022247074 A1 WO 2022247074A1
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Prior art keywords
air pressure
electronic cigarette
base
pressure sensor
air
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PCT/CN2021/119976
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English (en)
French (fr)
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黄高东
石秀红
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黄高东
石秀红
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Publication of WO2022247074A1 publication Critical patent/WO2022247074A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/51—Arrangement of sensors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F47/00—Smokers' requisites not otherwise provided for
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors

Definitions

  • the invention relates to the technical field of electronic cigarettes, in particular to an air pressure sensor of the electronic cigarette and the electronic cigarette.
  • E-cigarette is a new type of electronic equipment that atomizes the smoke liquid through an atomizer for users to use. Since the smoke liquid removes substances harmful to the body such as tar during production, the harm to the human body is eliminated.
  • Existing electronic cigarettes mainly include battery components, core control components, atomizer components, and air pressure sensors, which are fixedly connected in turn. This type of electronic cigarette is hindered by the structural design itself, and condensation often occurs after the smoke oil is atomized. The liquid returns to the air pressure sensor of the electronic cigarette. Most of the existing air pressure sensors of the electronic cigarette use capacitive sensors.
  • This type of sensor mainly deforms the internal PPS diaphragm through the airflow flowing into the cavity, thus causing the PPS diaphragm ( The relative spacing and relative area between SW) and the back plate (GND) change, which will eventually lead to a change in the capacitance of SW to GND. Gas, and the return of condensate to the PPS diaphragm will easily lead to abnormal capacitance changes, and the back-end data processing chip will not be able to collect accurate data, which will cause the electronic cigarette to fail to start. Therefore, how to design an oil-proof and waterproof electronic cigarette air pressure sensor is a technical problem to be solved urgently in the industry.
  • the invention provides an air pressure sensor for an electronic cigarette and an electronic cigarette, which solves the problem of poor reliability of the air pressure sensor caused by the poor waterproof and oil-proof ability of the electronic cigarette in the prior art.
  • an electronic cigarette air pressure sensor comprising a shell with an opening, a circuit board covering the opening of the shell, an ASIC chip set on the circuit board inside the shell, and The air pressure sensing element on the circuit board and electrically connected with the ASIC chip, the circuit board is provided with a first air hole, and the air pressure sensing element includes an air cavity communicated with the first air hole and is arranged on the There is at least one movable piezoelectric film at one end of the air cavity, and a second air hole is provided at the end of the housing opposite to the circuit board.
  • the air pressure sensing element includes a base, the base is surrounded by an annular air cavity, one end of the base is glued and fixed at the first air hole on the circuit board, and the piezoelectric film is fixed at the other end of the base.
  • the air pressure sensing element is provided with four piezoelectric films, one end of the piezoelectric film is connected to the base, and the piezoelectric film shields the air cavity.
  • the piezoelectric film is gradually inclined from the connection end with the base toward the direction away from the air cavity.
  • the cross-section of the base is rectangular, and the piezoelectric film is triangular, each side of the base is connected with a piece of the piezoelectric film, and the side of the piezoelectric film is connected to The sides of the base are connected, and the pointed end of the piezoelectric film is arranged toward the center line of the base.
  • solder paste is used between the shell and the circuit board.
  • the piezoelectric film is connected to the ASIC chip through wires.
  • the ASIC chip is bonded and fixed to the circuit board.
  • first air hole and the second air hole are staggered from each other.
  • An electronic cigarette comprising the air pressure sensor.
  • the air pressure sensing element in the present invention uses a piezoelectric film, and the electric signal can only be generated by making the film subject to continuous airflow pressure.
  • the piezoelectric material No electrical signal is generated; compared with the conventional technology, the present application can well prevent the defect that oil or water droplets fall on the surface of the piezoelectric film and generate an electrical signal by mistake, and improves the reliability of the air pressure sensor.
  • Fig. 1 is the sectional structure schematic diagram of air pressure sensor among the present invention
  • Fig. 2 is a schematic structural diagram of the air pressure sensing element in the top view direction of the present invention.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it may be mechanical connection or electrical connection; it may be direct connection or indirect connection through an intermediary, and it may be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
  • the present application proposes an air pressure sensor for an electronic cigarette, as shown in FIG. 1 , which mainly includes a housing 1 , a circuit board 2 , an ASIC chip 3 and an air pressure sensing element 4 .
  • the shell 1 is a dome-shaped shell with an opening at its lower end, and the circuit board 2 is welded and fixed at the opening below the shell by solder paste 8; the circuit board 2 is also provided with an ASIC chip 3, wherein the ASIC The chip 3 and the circuit board 2 are bonded and fixed by resin glue 9 , and the ASIC chip 3 is located inside the housing 1 ;
  • the difference between this application and the prior art is that the air pressure sensing element 4 has been adaptively modified in this application.
  • the air pressure sensing element 4 in the conventional technology generally uses a capacitive sensing element, while the air pressure sensing element 4 in this application generally uses a capacitive sensing element.
  • Element 4 adopts a piezoelectric sensor element, which specifically includes: a base 42, which is a square cylinder surrounded by four side walls, and the upper and lower ends of the base 42 communicate 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 of the air cavity, and one end of the piezoelectric film 41 is fixedly connected with the base 42, and the other end is movably arranged , so that the piezoelectric film 41 can be deformed under the action of force; the circuit board 2 is provided with a first air hole 5, the base 42 is installed at the first air hole 5 on the circuit board 2, and the air cavity of the base 42 The lower end communicates with the first air hole 5, and a second air hole 6 is provided on the upper end of the shell 1 (the end opposite to the circuit board 2), thereby forming a gas circulation path inside the shell 1.
  • a base 42 which is a square cylinder surrounded by four side walls, and the upper and lower ends
  • the gas flows from the bottom.
  • the upward flow drives the piezoelectric film 41 to deform. Due to the material characteristics of the piezoelectric film 41, the piezoelectric material integrated on the surface of the silicon film is used for energy conversion.
  • the film is pressed by continuous airflow, the film deforms and drives the pressure.
  • the electrical material is deformed, and the piezoelectric film 41 is connected to the ASIC chip 3 through the wire 7.
  • the piezoelectric Electrical materials do not generate electrical signals.
  • the air pressure sensing element 4 proposed in this application uses a piezoelectric film 41, the electric signal can only be generated by making the film subject to continuous airflow pressure.
  • the film is in a static state, or in a static state with liquid and oil, the piezoelectric material Then no electrical signal will be generated; compared with the conventional technology, the present application can well prevent the defect that the oil or water drop falls on the surface of the piezoelectric film 41 and generate an electrical signal by mistake, and improves the reliability of the air pressure sensor.
  • each piezoelectric film 41 is specifically arranged in the present application, and the cross-section of the base 42 is arranged as a rectangle, each piezoelectric film 41 is arranged as a triangle, and each piezoelectric film 41 The shape is the same, the side 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 towards the center line of the base 42, so that the four pieces of piezoelectric film 41 are pressed together.
  • the electrical thin films 41 are joined together, and a gap is formed between each piezoelectric thin film 41 and the piezoelectric thin film 41. This setting can greatly improve the sensitivity of the piezoelectric thin film 41. As long as the user inhales, it can sense and generate deformation, providing Reliable electrical signal.
  • 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. Viewed from the side, the part of the piezoelectric film 41 located at the center of the air cavity protrudes into a hilltop shape, so that It can facilitate the flow of gas from bottom to top, and also improves the sensitivity of the air pressure sensing element 4 .
  • gold wires are used in this application to electrically connect the ASIC chip 3 and the piezoelectric film 41 .
  • the first air hole 5 and the second air hole 6 in the present application are staggered from each other, and the second air hole 6 is arranged at a position opposite to the ASIC chip 3, so that the circulation path of the gas can be effectively extended, and the difficulty of inhalation is reduced, so that The inhalation action of the electronic cigarette is closer to the real smoking state, which improves the user experience.
  • the present application can also make special settings for the air cavity of the base 42, such as setting it in a curved shape to extend the airflow path.
  • the present application also proposes an electronic cigarette, which includes the above air pressure sensor.

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Abstract

一种电子烟气压传感器及电子烟，传感器包括外壳(1)、线路板(2)、ASIC芯片(3)、气压感应元件(4)，线路板(2)上设有第一气孔(5)，气压感应元件(4)包括基座(42)和压电薄膜(41)，基座(42)形成气腔，第一气孔(5)与气腔连通；压电薄膜(41)从与基座(42)的连接端起朝向远离气腔方向逐渐倾斜；外壳(1)与线路板(2)之间通过锡膏焊接，压电薄膜(41)与ASIC芯片(3)通过导线连接，ASIC芯片(3)与线路板(2)粘结固定，第一气孔(5)和第二气孔(6)相互错开。该技术方案能够很好的防止油或水滴落在压电薄膜(41)表面而误产生电信号的缺陷，提升了气压传感器的可靠性。

Description

电子烟气压传感器及电子烟 技术领域
本发明涉及电子烟技术领域，特别涉及一种电子烟气压传感器及电子烟。
背景技术
电子烟是将烟液经过雾化器雾化供使用者使用的新型电子设备，由于烟液在制作时便去除了焦油等危害身体的物质，消除了对于人体的危害。现有的电子烟主要包括电池组件、核心控制组件、雾化器组件及气压传感器依次固定连接构成，此类电子烟碍于结构设计本身的问题，往往在烟油雾化工作后，会出现冷凝液回流至电子烟气压传感器中，现有的电子烟气压传感器大多采用电容式传感器，这类传感器主要是通过流入腔体的气流致使其内部PPS振膜发生形变，从而导致PPS振膜(SW)与背极板(GND)的相对间距和相对面积发生改变，最终导致SW对GND的电容量的发生变化，后端数据处理芯片通过对这一电容变化量的侦测判断使用者是否吸气，而冷凝液回流到PPS振膜上容易导致电容的变化量产生异常，后端数据处理芯片便无法采集到准确的数据，进而导致电子烟启动失灵。因此，如何设计一种可防油防水的电子烟气压传感器是业界亟待解决的技术难题。
发明内容
本发明提供了一种电子烟气压传感器及电子烟，解决了现有技术中电子烟防水防油能力差而导致气压传感器可靠性差的问题。
本发明采用的技术方案是：一种电子烟气压传感器，包括具有开口的外壳，盖设于所述外壳开口上的线路板，设于所述外壳内部的线路板上的ASIC芯片，设于所述线路板上并与所述ASIC芯片电连接的气压感 应元件，所述线路板上设有第一气孔，所述气压感应元件包括与所述第一气孔连通的气腔和设于所述气腔一端的至少一片可活动的压电薄膜，所述外壳与所述线路板相对的一端设有第二气孔。
进一步地，所述气压感应元件包括基座，所述基座围设成环形的气腔，所述基座一端粘接固定在所述线路板上的第一气孔处，所述压电薄膜固定在所述基座的另一端。
进一步地，所述气压感应元件共设有四片压电薄膜，所述压电薄膜的一端与所述基座连接，且所述压电薄膜遮挡所述气腔。
进一步地，所述压电薄膜从与所述基座的连接端起朝向远离所述气腔方向逐渐倾斜。
进一步地，所述基座的横截面为矩形，且所述压电薄膜为三角形，所述基座的每个侧边均连接有一片所述压电薄膜，所述压电薄膜的边部与所述基座的侧边连接，且所述压电薄膜的尖角端朝向所述基座的中心线方向设置。
进一步地，所述外壳与所述线路板之间通过锡膏焊接。
进一步地，压电薄膜与所述ASIC芯片通过导线连接。
进一步地，所述ASIC芯片与所述线路板粘结固定。
进一步地，所述第一气孔和第二气孔相互错开。
一种电子烟，所述电子烟包括所述的气压传感器。
与现有技术比较，本发明中气压感应元件采用了压电薄膜，通过使薄膜受到持续的气流压迫才能产生电信号，当薄膜处于静止状态或者带液带油的静止状态时，压电材质则不产生电信号；与常规技术相比，本申请能够很好的防止油或水滴落在压电薄膜表面而误产生电信号的缺陷，提升了气压传感器的可靠性。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明中气压传感器的剖面结构示意图；
图2为本发明中气压感应元件的俯视方向的结构示意简图。
1、外壳；2、线路板；3、ASIC芯片；4、气压感应元件；41、压电薄膜；42、基座；5、第一气孔；6、第二气孔；7、导线；8、锡膏；9、树脂胶；10、硅胶。
具体实施方式
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
在本发明的描述中，需要理解的是，术语“中心”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
下面结合附图以及实施例对本发明的原理及结构进行详细说明。
本申请提出了一种电子烟的气压传感器，如图1所示，其主要包括外壳1、线路板2、ASIC芯片3以及气压感应元件4。
其中，外壳1为圆盖形的壳体，其下端设有开口，线路板2通过锡膏8焊接固定在壳体的下方的开口处；在线路板2上还设置有ASIC芯片3，其中ASIC芯片3与线路板2之间通过树脂胶9粘接固定，且ASIC芯片3位于外壳1的内部；气压感应元件4通过硅胶10粘结固定在线路板2上，同样设置在外壳1内部。
本申请与现有技术的不同之处在于，本申请中对气压感应元件4进行了适应性的改动，常规技术中的气压感应元件4一般使用电容式传感元件，而本申请中的气压感应元件4采用压电式传感元件，其具体包括：基座42，基座42为一个由四个侧壁围在一起的方形筒状，基座42的上、下两端相通形成一个气腔，基座42的上端设置有压电薄膜41，压电薄膜41遮盖在气腔的端部，且压电薄膜41的一端与基座42之间固定连接在一起，另一端为可活动地设置，从而使压电薄膜41能够在力的作用下发生变形；在线路板2上设置有第一气孔5，基座42安装在线路板2上的第一气孔5处，基座42气腔的下端与第一气孔5连通，并且在外壳1的上端(与线路板2相对的一端)设置有第二气孔6，从而在外壳1内部形成一个气体流通路径，在吸气的时候，气体从下向上流动，带动压 电薄膜41变形，由于压电薄膜41的材料特性，利用集成在硅材薄膜的表面的压电材料进行能量转换，当薄膜受到持续的气流压迫时，薄膜进行形变并带动压电材料产生形变，压电薄膜41与ASIC芯片3通过导线7连接，压电材质在物理特性改变时就会产生电信号输出，并传递到ASIC芯片3中，而当薄膜处于静止状态时，压电材质则不产生电信号。
由于本申请中所提出的气压感应元件4采用了压电薄膜41，通过使薄膜受到持续的气流压迫才能产生电信号，当薄膜处于静止状态，或者带液带油的静止状态时，压电材质则不产生电信号；与常规技术相比，本申请能够很好的防止油或水滴落在压电薄膜41表面而误产生电信号的缺陷，提升了气压传感器的可靠性。
具体地，如图2所示，本申请中具体设置了四片压电薄膜41，且基座42的横截面设置成矩形，每片压电薄膜41设置成三角形，每片压电薄膜41的形状相同，三角形的压电薄膜41的边部与基座42的侧边固定，对应的三角形的压电薄膜41的尖角端则朝向基座42的中心线方向延伸，这样便使得四片压电薄膜41相互拼合，且每片压电薄膜41与压电薄膜41之间形成间隙，这样设置能够极大提升压电薄膜41的灵敏性，只要用户吸气便能够感应到并产生形变，提供可靠的电信号。
优选地，本申请中的压电薄膜41从与基座42的连接端起朝向远离气腔方向逐渐倾斜，从侧面看，压电薄膜41位于气腔中心位置的部分凸起成山顶形状，这样能够便于气体从下向上流动，同样提高了气压感应元件4的灵敏性。
优选地，本申请中使用金线将ASIC芯片3和压电薄膜41进行电连接。
优选地，本申请中的第一气孔5和第二气孔6相互错开，第二气孔6设置在与ASIC芯片3相对的位置，这样能够有效延长的气体的流通路 径，减小吸气难度，使电子烟的吸气动作更接近真实的吸烟状态，提升用户体验。
为提升吸气体验，本申请还可以对基座42的气腔进行特殊设置，如设置成弯曲状来延长气流路径等。
本申请还提出了一种电子烟，其包括上述气压传感器。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，应包含在本发明的保护范围之内。

Claims (10)

  1. 一种电子烟气压传感器，包括具有开口的外壳(1)，盖设于所述外壳(1)开口上的线路板(2)，设于所述外壳(1)内部的线路板(2)上的ASIC芯片(3)，设于所述线路板(2)上并与所述ASIC芯片(3)电连接的气压感应元件(4)，其特征在于，所述线路板(2)上设有第一气孔(5)，所述气压感应元件(4)包括与所述第一气孔(5)连通的气腔和设于所述气腔一端的至少一片可活动的压电薄膜(41)，所述外壳(1)与所述线路板(2)相对的一端设有第二气孔(6)。
  2. 根据权利要求1所述的电子烟气压传感器，其特征在于，所述气压感应元件(4)包括基座(42)，所述基座(42)围设成环形的气腔，所述基座(42)一端粘接固定在所述线路板(2)上的第一气孔(5)处，所述压电薄膜(41)固定在所述基座(42)的另一端。
  3. 根据权利要求2所述的电子烟气压传感器，其特征在于，所述气压感应元件(4)共设有四片压电薄膜(41)，所述压电薄膜(41)的一端与所述基座(42)连接，且所述压电薄膜(41)遮挡所述气腔。
  4. 根据权利要求3所述的电子烟气压传感器，其特征在于，所述压电薄膜(41)从与所述基座(42)的连接端起朝向远离所述气腔方向逐渐倾斜。
  5. 根据权利要求3所述的电子烟气压传感器，其特征在于，所述基座(42)的横截面为矩形，且所述压电薄膜(41)为三角形，所述基座(42)的每个侧边均连接有一片所述压电薄膜(41)，所述压电薄膜(41)的边部与所述基座(42)的侧边连接，且所述压电薄膜(41)的尖角端朝向所述基座(42)的中心线方向设置。
  6. 根据权利要求1所述的电子烟气压传感器，其特征在于，所述外壳(1)与所述线路板(2)之间通过锡膏(8)焊接。
  7. 根据权利要求1所述的电子烟气压传感器，其特征在于，压电薄膜(41)与所述ASIC芯片(3)通过导线(7)连接。
  8. 根据权利要求1所述的电子烟气压传感器，其特征在于，所述ASIC芯片(3)与所述线路板(2)粘结固定。
  9. 根据权利要求1所述的电子烟气压传感器，其特征在于，所述第一气孔(5)和第二气孔(6)相互错开。
  10. 一种电子烟，其特征在于，所述电子烟包括如权利要求1至9中任意一项所述的气压传感器。
PCT/CN2021/119976 2021-05-25 2021-09-23 电子烟气压传感器及电子烟 WO2022247074A1 (zh)

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