Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 1 of 16 PageID# 17058
`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 1 of 16 Page|D# 17058
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`EXHIBIT 15
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`EXHIBIT 15
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 2 of 16 PageID# 17059
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`(19) State Intellectual Property Office of the P. R. China
`[12] Utility Model Patent
`Specification
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`(10) Authorized Publication No.: CN 201482667 U
`(45) Authorized Publication Date: May 26, 2010
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`1 Page of Claims, 3 Pages of Specification, and 2 Pages of
`Attached Drawings
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`(21) Application No.: 200920151031. 1
`(22) Date of Application: April 28, 2009
`(73) Patent Assignee: Minilogic Device Corporation Limited
`Address: Room 508-509, IC Development Centre,
`Sha Tin Science Park, Hong Kong, China
`(72) Patent inventor: Loi Ying Liu
`(74) Patent Agency: Guangdong Guoxin Law Firm 44221
` Agent Man Lee
`(51) Int. Cl.
` B05B 17/00 (Jan. 2006)
` B05B 15/00 (Jan. 2006)
` A24B 15/00 (Jan. 2006)
`(54) Title of Utility Model
` An Electronic Atomizer
`(57) Abstract
` A kind of electronic atomizer relates to a battery-driven
`heating device, which comprises a shell and a battery
`arranged in the shell, wherein a processing chip, a heating
`device and a sensing device are arranged in the shell, and the
`processing chip is electrically connected with the battery, the
`heating device and the sensing device respectively; the
`processing chip is internally provided with an airflow
`sensing switch circuit, a heating drive circuit, a charging
`mode detection circuit, a battery charging and protection
`circuit and a light-emitting diode drive circuit, the output pin
`of the heating drive circuit is connected with the heating
`device, the output pin of the light-emitting diode drive
`circuit is connected with light-emitting diode, the input pin
`of the airflow sensing switch circuit is connected with the
`sensing device, and the charging mode detection circuit and
`the battery charging and protection circuit are connected
`with the battery at one end, and with the power input at the
`other end. The present utility model can sense the user’s
`smoking motion by airflow sensing mode, which can greatly
`improve the service life of the switch device, increase
`sensitivity, eliminate wrong triggering and reduce assembly
`cost.
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`CN 201482667 U
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`

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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 3 of 16 PageID# 17060
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`CN 201482667 U Claims
`1 / 1
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`1. An electronic atomizer comprising a shell (1) and a battery (5) arranged in the shell, wherein a processing chip (2), a
`heating device (3) and a sensing device (4) are arranged inside the shell (1), the processing chip (1) is electrically
`connected with the battery (5), the heating device (3) and the sensing device (4) respectively; the processing chip (2) is
`internally provided with an airflow sensing switch circuit (21), a heating drive circuit (22), a charging mode detection
`circuit (23), a battery charging and protection circuit (24) and a light-emitting diode drive circuit (25); the output pin of
`the heating drive circuit (22) is connected with the heating device (3), the output pin of the light-emitting diode drive
`circuit (25) is connected with light-emitting diode D1, the input pin of the airflow sensing switch circuit (21) is
`connected with the sensing device (4), and the charging mode detection circuit (23) and the battery charging and
`protection circuit (24) are connected with the battery (5) at one end, and with the power input at the other end.
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`2. The electronic atomizer according to claim 1, wherein an electronic serial interface (6) is arranged in the shell (1), an
`opening for the electronic serial interface is arranged on the shell (1), and the electronic serial interface (6) is electrically
`connected with the processing chip (2).
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`3. The electronic atomizer according to claim 1, wherein a battery compartment is arranged in the shell (1), and a battery is
`installed in the battery compartment.
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`4. The electronic atomizer according to claim 1, wherein the heating device (3) is a heating wire.
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`5. The electronic atomizer according to claim 1, wherein the sensing device (4) is a capacitive airflow sensing.
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`6. The electronic atomizer according to claim 2, wherein the electronic serial interface (6) is a USB interface.
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`7. The electronic atomizer according to claim 1, wherein: the pin 1 of the processing chip (2) is set as an input pin of an
`air-flow sensing switch circuit, pin 2 is set as a grounding pin, the pin 3 is set as an output pin of the light-emitting diode
`drive circuit, the pin 4 is set as an output pin of the heating drive circuit and an input pin of the charging mode detection
`circuit and the battery charging and protection circuit, and the pin 5 is set as a power input pin.
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`8. The electronic atomizer according to claim 1, wherein the heating drive circuit (22) outputs the voltage to the heating
`device (3) in the form of pulse width modulation.
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 4 of 16 PageID# 17061
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`CN 201482667 U Specification
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`An Electrical Connector
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`Technical Field
`[0001] The present utility model relates to a battery-driven heating device.
`Background Art
`[0002]
`In the market, electronic atomizers are powered by lithium batteries or other power sources and use a heating wire
`to generate heat to atomize the liquid, which is then inhaled by people. In medical applications, the atomized liquid is
`medicinal liquid. In the application of electronic cigarettes, the atomized liquid simulates the traditional tobacco effect or
`other flavors. At present, electronic cigarettes use various switching devices such as mechanical switch and Hall sensing
`switch to sense the smoking motion of users, so as to decide to switch on or off the heating device. These switching devices
`all have a mechanical part or magnetic sensing part, causing the products to have a short life, be easy to produce error
`triggering, or be lack sensitivity.
`Summary of the Invention
`[0003] The purpose of the present utility model is to provide an electronic atomizer that controls the switch by airflow
`sensing.
`[0004] The purpose of the present utility model can be achieved by designing an electronic atomizer comprising a shell
`and a battery arranged in the shell, wherein a processing chip, a heating device and a sensing device are arranged inside the
`shell, the processing chip is electrically connected with the battery, the heating device and the sensing device respectively;
`the processing chip is internally provided with an airflow sensing switch circuit, a heating drive circuit, a charging mode
`detection circuit, a battery charging and protection circuit and a light-emitting diode drive circuit; the output pin of the
`heating drive circuit is connected with the heating device, the output pin of the light-emitting diode drive circuit is connected
`with light-emitting diode, the input pin of the airflow sensing switch circuit is connected with the sensing device, and the
`charging mode detection circuit and the battery charging and protection circuit are connected with the battery at one end, and
`with the power input at the other end.
`[0005] The present utility model senses the smoking motion of the user in an innovative airflow sensing way, which can
`greatly prolong the service life of the switch device, increase sensitivity, eliminate wrong triggering and reduce assembly
`cost.
`Description of the Attached Drawings
`[0006] Fig. 1 is a structural schematic diagram of a preferred embodiment of the present utility model.
`[0007] Fig. 2 is a functional module diagram of the preferred embodiment of the present utility model.
`[0008] Fig. 3 is a circuit schematic diagram of the preferred embodiment of the present utility model in heating mode.
`[0009] Fig. 4 is a circuit schematic diagram of the preferred embodiment of the present utility model in charging mode.
`Specific Embodiment
`[0010] The present utility model will be further described concerning the following embodiment.
`[0011] As shown in Figs. 1 and 2, an electronic atomizer comprising a shell 1 and a battery 5 arranged in the shell,
`wherein a processing chip 2, a heating device 3 and a sensing device 4 are arranged inside the shell 1, the processing chip 1
`is electrically connected with the battery 5, the heating device 3 and the sensing device 4 respectively; the processing chip 2
`is internally provided with an airflow sensing switch circuit 21, a heating drive circuit 22, a charging mode detection circuit
`23, a battery charging and protection circuit 24 and a light-emitting diode drive circuit 25; the output pin of the heating drive
`circuit 22 is connected with the heating device 3, the output pin of the light-emitting diode drive circuit 25 is connected with
`the light-emitting diode D1, the input pin of the airflow sensing switch circuit 21 is connected with the sensing device 4, the
`charging mode detection circuit 23 and the battery charging and protection circuit 24 are connected with the battery 5 at one
`end, and with the power input at the other end, and an opening for the heating device is provided on the shell.
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`3
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 5 of 16 PageID# 17062
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`CN 201482667 U Specification
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`[0012] As shown in Fig. 1, an electronic serial interface 6 is arranged in shell 1, an opening for the electronic serial
`interface is arranged on shell 1, and the electronic serial interface 6 is electrically connected with the processing chip 2. The
`electronic serial interface 6 in this embodiment is a USB interface.
`[0013] As shown in Fig. 2, pin 1 of the processing chip 2 is set as an input pin of an air-flow sensing switch circuit, pin 2
`is set as a grounding pin, the pin 3 is set as an output pin of the light-emitting diode drive circuit, the pin 4 is set as an output
`pin of the heating drive circuit and an input pin of the charging mode detection circuit and the battery charging and
`protection circuit, and the pin 5 is set as a power input pin.
`[0014] A battery compartment is arranged in shell 1, and a battery is installed in the battery compartment. The battery in
`this embodiment is a lithium battery.
`[0015] The heating drives circuit 22 is used to drive the heating device 3, and the heating drives circuit 22 outputs the
`voltage to the heating device 3 in the form of pulse width modulation. The heating device 3 burns cigarettes and atomized
`liquid by generating heat. The heating device 3 can be a heating wire, a heating resistor, or other materials that generate heat
`by using electric energy. In this embodiment, the heating device 3 is a heating wire.
`[0016] The sensing device 4 is a capacitive airflow sensor. The airflow sensing switch circuit 21 is used to sense the user’s
`smoking motion and provides airflow sensing function by detecting a capacitance value of an external capacitive airflow
`sensor C1. Airflow will be generated when the users smoke, and when the airflow passes through the capacitive airflow
`sensor C1, the capacitance value of capacitive airflow sensor C1 will change, thus triggering the airflow sensing switch
`circuit 21.
`[0017] As shown in Fig. 3, the processing chip is U1, the battery pack is BT1, the sensing device is C1, the heating device
`is L1, and the light-emitting diode is D1. The capacitor C2 is connected with pin 5 (BAT) of the processing chip U1 at one
`end, and the capacitor C2 is grounded at the other end. Airflow is generated when the user smokes, and the airflow triggers
`the airflow sensing switch circuit 21 through the capacitive airflow sensing device C1. Then, the heating drive circuit 22
`outputs voltage to the heating device L1 in the form of pulse width modulation, and the high temperature and heat generated
`by the heating device L1 are enough to atomize the liquid imitating a cigarette for the user to inhale. When heating, the
`light-emitting diode drive circuit 25 simultaneously outputs current to the light-emitting diode D1 to show that the heating
`device L1 is heating. When the user stops smoking, processing chip 2 will immediately stop driving the heating device L1
`and the light-emitting diode D1.
`[0018]
`If the user smokes continuously for more than five seconds, the processing chip 2 will stop outputting voltage to
`the heating device L1 and flash the light-emitting diode D1 several times, indicating that the heating time is too long.
`[0019] When the voltage of the lithium battery is lower than 3.2V, after the user smokes and the airflow sensing switch
`circuit 21 is triggered, the processing chip 2 will not output voltage to the heating device L1, and will flash the light-emitting
`diode D1 several times to indicate that the battery voltage is too low. This can protect battery 5 from over-discharge.
`[0020] The charging mode detection circuit 23 can detect whether the present utility model is in battery charging mode or
`normal heating mode so that it can normally charge or atomize the liquid. When the voltage of the fourth pin (OUT) of the
`processing chip 2 is higher than the voltage of the fifth pin (BAT), the processing chip 2 is in the charging mode, and
`receives power from USB via the fourth pin (OUT) for charging the battery. When the voltage of the fifth pin (BAT) is
`higher than or equal to the voltage of the fourth pin (OUT), processing chip 2 is in a normal heating state and can drive the
`heating wire to heat according to the instruction of the airflow sensing switch circuit 21.
`[0021] The battery charging and protection circuit 24 provides the charging and protection functions to the lithium battery
`5, and can fully charge the lithium battery 5 by limiting the voltage with a constant current. In addition, circuit 24 can be
`connected to other electronic products through the USB interface 6, and can directly use the USB power supply for charging.
`In the normal working state, circuit 24 can detect the voltage of the lithium battery 5 to protect battery 5 from over-discharge.
`Lithium batteries can be of different capacities, shapes and packages. In this way, the lithium battery can be directly used for
`power supply without adding a lithium battery protection chip and charging chip.
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`4
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 6 of 16 PageID# 17063
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`CN 201482667 U Specification
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`[0022] As shown in Fig. 4, the processing chip is U1, the battery pack is BT1, the sensing device is C1, and the
`light-emitting diode is D1. The capacitor C2 is connected with pin 5 (BAT) of the processing chip U1 at one end and is
`grounded at the other end. When the output pin 4 (OUT) of the processing chip U1 is connected with a charging power
`supply (5V power supply or USB power supply in the figure), the whole circuit enters a charging state. The processing chip
`U1 inputs the current (constant current 100mA) to the lithium battery BT1 in the way of limiting the voltage with a constant
`current until the battery is fully charged (limiting voltage of 4.2V). During charging, the processing chip U1 drives the
`light-emitting diode D1 to emit light, indicating that the circuit is charging. When the battery is fully charged, the processing
`chip U1 will turn off the light-emitting diode D1 to indicate a full charge.
`[0023] During charging, if the battery voltage is above 2.9V, the processing chip U1 will charge at full speed (100mA)
`until the battery is fully charged. If the battery voltage is below 2.9V, the processing chip U1will charge at one-tenth of the
`speed. This can protect the battery and prevent charging in a short circuit.
`[0024] The light-emitting diode drive circuit 25 drives the light-emitting diode D1 to display the working state or imitate
`the real cigarette fire after receiving the switching instruction of the airflow sensing switching circuit.
`[0025] The present utility model is simple and durable, and can ignite 2,000 times under normal conditions. It has the
`function of airflow sensing switch and also the battery charging and battery protection functions, and can directly take
`electricity
`from
`the
`USB
`interface
`of
`other
`electronic
`products
`for
`charging.
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`5
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 7 of 16 PageID# 17064
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`CN 201482667 U Drawings
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`Fig. 1
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`Fig. 2
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 8 of 16 PageID# 17065
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`CN 201482667 U Drawings
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`Fig. 3
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`Fig. 4
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 9 of 16 PageID# 17066
`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 9 of 16 PagelD# 17066
`7‘
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`f6!
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`
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`
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`Project Manager
`
`Date:
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`May 20, 2021
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`

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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 10 of 16 PageID# 17067
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`(19)中华人民共和国国家知识产权局
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`汐 (12)实用新型专利
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`(10)授权公告号 CN 201482667 U
`(45)授权公告日2010. 05. 26
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`权利要求书1页说明书3页附图2页
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`(21)申请号 200920151031. 1
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`(22)申请日 2009. 04. 28
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`(73)专利权人微创高科有限公司
`地址中国香港沙田科学园集成电路开发中
`心 508-509 室
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`(72)发明人廖来英
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`(74)专利代理机构广东国欣律师事务所44221
`代理人李文
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`(51) Int. Cl.
`B05B /7/00(2006.01)
`B05B /QW (2006. 01)
`A24B /QW (2006. 01)
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`(54)实用新型名称
`电子雾化器
`(57)摘要
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`一种电子雾化器，涉及电池驱动发热装置。其
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`包括壳体、设置在壳体内的电池，所述壳体内设有
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`处理芯片、发热装置和感应装置，处理芯片分别与
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`电池、发热装置和感应装置电连接；处理芯片内
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`设有气流感应开关电路、发热驱动电路、充电模式
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`检测电路、电池充电及保护电路和发光二极管驱
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`动电路，发热驱动电路的输出脚与发热装置连接,
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`发光二极管驱动电路的输出脚与发光二极管连
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`接，气流感应开关电路的输入脚与感应装置连接,
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`充电模式检测电路和电池充电及保护电路的一端
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`与电池连接，另一端与电源输入端连接。本实用新
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`型以气流感应方式来感应使用者抽烟的动作，可
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`以大幅度提高开关装置的寿命，增加敏感度，去除
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`错误触发和降低组装成本。
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`二
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`Z 9 9魁寸 Ι0Ζg
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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 11 of 16 PageID# 17068
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`CN 201482667 U
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`权利要求书
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`1/1页
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`1. 一种电子雾化器，包括壳体（1）、设置在壳体内的电池（5）,其特征在于：所述壳体
`（1）内设有处理芯片（2）、发热装置（3）和感应装置（4）,处理芯片（1）分别与电池（5）、发热
`装置（3）和感应装置（4）电连接；处理芯片（2）内设有气流感应开关电路（21）、发热驱动电
`路（22）、充电模式检测电路（23）、电池充电及保护电路（24）和发光二极管驱动电路（25）,
`发热驱动电路（22）的输出脚与发热装置（3）连接,发光二极管驱动电路（25）的输出脚与
`发光二极管D1连接，气流感应开关电路（21）的输入脚与感应装置（4）连接,充电模式检测
`电路（23）和电池充电及保护电路（24）的一端与电池（5）连接,另一端与电源输入端连接。
`2. 根据权利要求1所述的电子雾化器，其特征在于：所述壳体（1）内设置电子串接口
`（6）,壳体 ⑴ 上设有供电子串接口使用的开口 ；电子串接口⑹ 与处理芯片 ⑵ 电连接。
`3. 根据权利要求1所述的电子雾化器，其特征在于：所述壳体（1）内设置电池仓，电池
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`安装在电池仓内。
`4. 根据权利要求1所述的电子雾化器,其特征在于：所述发热装置（3）为发热丝。
`5. 根据权利要求1所述的电子雾化器,其特征在于：所述感应装置（4）为电容式气流
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`感应器。
`6. 根据权利要求2所述的电子雾化器，其特征在于：所述电子串接口（6）为USB接口。
`7. 根据权利要求1所述的电子雾化器,其特征在于：所述处理芯片（2）的脚1设为气
`流感应开关电路输入脚，脚2设为接地脚，脚3设为发光二极管驱动电路的输出脚，脚4设
`为发热驱动电路的输出脚和充电模式检测电路、电池充电及保护电路的输入脚，脚5设为
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`电源输入脚。
`&根据权利要求1所述的电子雾化器，其特征在于：所述发热驱动电路（22）以脉冲宽
`度变调形式输出电压给发热装置（3）。
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`2
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`

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`Case 1:20-cv-00393-LO-TCB Document 696-8 Filed 06/02/21 Page 12 of 16 PageID# 17069
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`CN 201482667 U
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`说明书
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`电子雾化器
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`技术领域
`[0001] 本实用新型涉及电池驱动发热装置。
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`1/3页
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`背景技术
`[0002] 在市场上有电子雾化器都以锂电池或其它电源供电，以发热丝发热雾化液体，然
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`后让人吸入。在医疗应用中，被雾化的是药用性液体。在电子香烟的应用中，被雾化的是模
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`拟传统烟草效果或其它味道的液体。现时的电子香烟都在用各式各样的开关装置如机械开
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`关和霍尔感应开关等来感应使用者抽烟的动作，以决定开关发热装置。这些开关装置都有
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`机械部份或磁感部份，令产品寿命短和容易产生错误触发或敏感度不足。
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`发明内容
`[0003] 本实用新型的目的在于提供一种通过气流感应控制开关的电子雾化器。
`[0004] 本实用新型的目的可以这样实现,设计一种电子雾化器，包括壳体、设置在壳体内
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`的电池，所述壳体内设有处理芯片、发热装置和感应装置,处理芯片分别与电池、发热装置
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`和感应装置电连接；处理芯片内设有气流感应开关电路、发热驱动电路、充电模式检测电
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`路、电池充电及保护电路和发光二极管驱动电路,发热驱动电路的输出脚与发热装置连接,
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`发光二极管驱动电路的输出脚与发光二极管连接，气流感应开关电路的输入脚与感应装置
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`连接，充电模式检测电路和电池充电及保护电路的一端与电池连接，另一端与电源输入端
`
`连接。
`[0005] 本实用新型以创新的气流感应方式来感应使用者抽烟的动作，可以人幅度提高开
`
`关装置的寿命，增加敏感度，去除错误触发和降低组装成本。
`
`附图说明
`[0006] 图1是本实用新型较佳实施例的结构示意图。
`[0007] 图2是本实用新型较佳实施例的功能模块图。
`[0008] 图3是本实用新型较佳实施例在发热模式的电路原理图。
`[0009] 图4是本实用新型较佳实施例在充电模式的电路原理图。
`
`具体实施方式
`[0010] 以下结合实施例对本实用新型作进一步的描述。
`[0011] 如图1、图2所示,一种电子雾化器，包括壳体1、设置在壳体内的电池5,所述壳体
`1内设有处理芯片2、发热装置3和感应装置4,处理芯片1分别与电池5、发热装置3和感
`应装置4电连接；处理芯片2内设有气流感应开关电路21、发热驱动电路22、充电模式检测
`电路23、电池充电及保护电路24和发光二极管驱动电路25,发热驱动电路22的输出脚与
`发热装置3连接,发光二极管驱动电路25的输出脚与发光二极管D1连接，气流感应开关电
`路21的输入脚与感应装置4连接，充电模式检测电路23和电池充电及保护电路24的一端
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`与电池5连接，另一端与电源输入端连接，壳体上设有供发热装置使用开口。
`[0012] 如图1所示，所述壳体1内设置电子串接口 6,壳体1上设有供电子串接口使用的
`开口 ；电子串接口 6与处理芯片2电连接。本实施例中所述电子串接口 6为USB接口。
`[0013] 如图2所示,所述处理芯片2的脚1设为气流感应开关电路输入脚，脚2设为接地
`脚，脚3设为发光二极管驱动电路的输出脚，脚4设为发热驱动电路的输出脚和充电模式检
`测电路、电池充电及保护电路的输入脚，脚5设为电源输入脚。
`[0014] 所述壳体1内设置电池仓，电池安装在电池仓内。本实施例的电池采用锂电池。
`[0015] 发热驱动电路22用作驱动发热装置3,所述发热驱动电路22以脉冲宽度变调形式
`输出电压给发热装置3。发热装置3透过产生热量来燃点香烟和雾化液体。这发热装置3
`可以是发热丝、发热电阻或其它利用电能产生热量的材料。本实施例中,所述发热装置3为
`
`发热丝。
`[0016] 所述感应装置4为电容式气流感应器。气流感应开关电路21用于感应使用者抽
`烟的动作，该电路透过检测外接电容式气流感应器C 1的电容值来提供气流感应功能。使
`用者抽烟时会产生气流，当气流流经电容式气流感应器C1时,该电容式气流感应器C1的电
`容值会改变,从而触发气流感应开关电路21。
`[0017] 如图3所示，处理芯片为U1,电池组为BT1,感应装置为C1,发热装置为L1,发光二
`极管为DE电容C2的一端与处理芯片U1的引脚5 (BAT)连接，电容C2的另一端接地。使
`用者抽烟时会产生气流，气流通过电容式气流感应装置C1触发气流感应开关电路21,然后
`发热驱动电路22会以PWM的形式输出电压给发热装置L1,发热装置L1产生的高温和热量
`足以雾化模仿香烟的液体，供使用者吸入。在发热的时候，发光二极管驱动电路25会同时
`输出电流给发光二极管D1,以显示发热装置L1正在发热。当使用者停下不抽的时候，处理
`芯片2会立即停止驱动发热装置L1和发光二极管DL·
`[0018] 如果使用者连续抽烟五秒钟以上，处理芯片2会停止输出电压给发热装置L1,并
`闪动发光二极管D1数次,表示发热时间过长。
`[0019] 当锂电池电压低于3. 2V,使用者抽烟触发气流感应开关电路21后，处理芯片2不
`会输出电压给发热装置L1发热,并且闪动发光二极管D1数次，以表示电池电压太低。这可
`以保护电池5,避免过度放电。
`[0020] 充电模式检测电路23可检测本实用新型处于电池充电模式或是正常发热模式,
`使其可正常充电或正常雾化液体。当处理芯片2第四引脚(OUT)的电压高于第五引脚(BAT)
`的电压时，则处理芯片2处于充电模式，经第四引脚(OUT)从USB取电，以作电池充电之用。
`当第五引脚(BAT)的电压高于或相等于第四引脚(OUT)的电压时，则处理芯片2处于正常
`发热状态，能按气流感应开关电路21的指令驱动发热丝发热。
`[0021] 电池充电及保护电路24提供锂电池5充电及保护功能，能以恒定电流限定电压的
`方式，把锂电池5充满。而且该电路24能透过USB接口 6连接其它电子产品,直接利用USB
`电源来充电。在平时的工作状态,该电路24能侦测锂电池5的电压，保护电池5,避免过度
`
`放电。锂电池可以是不同容量，不同形状和不同封装。这样可以直接用锂电池供电，不用另
`
`加锂电池保护芯片和充电芯片。
`[0022] 如图4所示，处理芯片为U1,电池组为BT1,感应装置为C1,发光二极管为D1。电容
`C2的一端与处理芯片U1的引脚5 (BAT)连接，电容C2的另一端接地。当处理芯片U1的输
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`出引脚4（OUT）接上充电电源（图中为5V电源或USB电源）的时候，整个电路进入充电状
`态。处理芯片U1会以恒定电流限定电压的方式,把电流（恒流100mA）输入到锂电池BT1,
`直到电池充满（限压4.2V）。在充电的时候，处理芯片U1会驱动发光二极管D1发光，表示
`线路在充电状态。当充满电的时候，处理芯片U1会关掉发光二极管D1,以表示充满电。
`[0023] 在充电时，电池电压在2. 9V以上，处理芯片U1会以全速（100mA）充电，直到电池
`充满电。如果电池电压在2. 9V以下，处理芯片U1会以十份之一的速度来充电。这可以保
`
`护电池和防止在短路状态下充电。
`[0024] 发光二极管驱动电路25在接收到气流感应开关电路的开关指令后，驱动发光二
`极管D1显示工作状态或模仿真香烟火光。
`[0025] 本实用新型简便耐用，正常情况下可燃点2000次。并具备气流感应开关功能，同
`时配备电池充电及电池保护功能,并能直接从其它电子产品的USB接口取电作充电用途。
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