US 12,127,598 B2
Airflow sensor and electronic cigarette
Jing Yang, Shenzhen (CN); Laihong Zhang, Shenzhen (CN); Zhongli Xu, Shenzhen (CN); and Yonghai Li, Shenzhen (CN)
Assigned to SHENZHEN FIRST UNION TECHNOLOGY CO., LTD., Shenzhen (CN)
Appl. No. 17/765,438
Filed by SHENZHEN FIRST UNION TECHNOLOGY CO., LTD., Shenzhen (CN)
PCT Filed Sep. 25, 2020, PCT No. PCT/CN2020/117869
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/063268, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 201921653910.4 (CN), filed on Sep. 30, 2019.
Prior Publication US 2022/0361584 A1, Nov. 17, 2022
Int. Cl. A24F 40/51 (2020.01); A24F 40/10 (2020.01); A24F 40/40 (2020.01); G01F 1/56 (2006.01)
CPC A24F 40/51 (2020.01) [A24F 40/10 (2020.01); A24F 40/40 (2020.01); G01F 1/56 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An airflow sensor, comprising a sensing circuit module, a first sealing piece and a second sealing piece, wherein the sensing circuit module comprises a circuit board and a sensing component disposed on the circuit board, the circuit board comprises a first surface and a second surface disposed at two opposite sides of the circuit board, the first sealing piece is disposed to cover at least a part of the first surface, the second sealing piece is disposed to cover at least a part of the second surface, a first accommodating cavity is defined and formed between the first sealing piece and the circuit board, the sensing component is received in the first accommodating cavity, the first sealing piece comprises a first waterproof air-permeable portion, the first waterproof air-permeable portion is used to form airflow communication between the first accommodating cavity and an outside of the airflow sensor, and to prevent liquid outside the airflow sensor from entering the first accommodating cavity, a connecting soldering pad electrically connected with the sensing component is disposed at the circuit board, the airflow sensor is electrically connected with other circuitry components through the connecting soldering pad, the connecting soldering pad is not covered by either the first sealing piece or the second sealing piece.