Title:
VACUUM STICK
Document Type and Number:
WIPO Patent Application WO/2023/016186
Kind Code:
A1
Abstract:
Disclosed in the present utility model is a vacuum stick, comprising a housing, a holder mounted inside the housing, and an adapter assembly mounted at an opening end of the housing, wherein a vacuum pump is mounted on the holder; a storage battery and a circuit board are mounted in the housing; the vacuum pump and the storage battery are both electrically connected to the circuit board; the housing is provided with a button for triggering a key on the circuit board to control the vacuum pump to start or stop; a negative pressure sensor is mounted on the circuit board; and the vacuum stick further comprises a tee joint, an inner cavity of the adapter assembly being in communication with a first end of the tee joint, a measurement end of the negative pressure sensor being in communication with a second end of the tee joint, and an extraction opening of the vacuum pump being in communication with a third end of the tee joint. In the present utility model, the inner cavity of the adapter assembly, the measurement end of the negative pressure sensor and the extraction opening of the vacuum pump are in communication by means of the tee joint, that is, the measurement end of the negative pressure sensor is in direct communication with the extraction opening of the vacuum pump, which can improve the measurement accuracy of the negative pressure sensor on the negative pressure value at the extraction opening of the vacuum pump.
Inventors:
LI BIN (CN)
Application Number:
PCT/CN2022/105811
Publication Date:
February 16, 2023
Filing Date:
July 14, 2022
Export Citation:
Assignee:
NINGBO HAOLEI INTELLIGENT TECH CO LTD (CN)
International Classes:
F04B37/14; F04B35/04; F04B39/12
Foreign References:
| CN215566451U | 2022-01-18 | |||
| CN212774636U | 2021-03-23 | |||
| CN202768320U | 2013-03-06 | |||
| US6439104B1 | 2002-08-27 |
Attorney, Agent or Firm:
SHENZHEN WINSTON PATENT ATTORNEYS (CN)
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