An airtight double-inlet micro air pump

Abstract

The invention discloses an air tightness double-air-inlet mini-type air pump which comprises a motor and a shell assembly. The shell assembly comprises a fixing base and a cup base, a valve seat is installed on the cup base, an upper cover with an air outlet is arranged on the valve seat, a vibration-resistant sealing pad is arranged between the valve seat and the upper cover, an air inlet cavity is defined by the fixing base and the cup base, an air exhaust cavity is defined by the valve seat and the upper cover, an eccentric cap, a coupled axle and a coupled support are arranged in the air inlet cavity, an air compression cup is installed on the cup base, a one-way vent valve is installed on the valve seat, the inner cavity of the air compression cup is an air compression cavity, the eccentric cap is connected with the motor, an eccentric hole is formed in the eccentric cap, one end of the coupled axle is installed in the eccentric hole, the other end of the coupled axle is connected with the coupled support, a left air inlet and a right air inlet are formed in the fixing base, the position of the left air inlet and the position of the right air inlet exceed a rotation track of the eccentric cap, and therefore a double-air-inlet structure can be formed. The air tightness double-air-inlet mini-type air pump has the advantages of being good in sealing effect, large in suction capacity and capable of reducing air suction resistance and vibration.

Description

technical field [0001] The invention relates to the technical field of a micro air pump product, in particular to an airtight double air intake micro air pump. Background technique [0002] At present, the commonly used miniature air pump generally includes a motor and a housing assembly. The housing assembly includes an upper cover and a valve seat welded together by ultrasonic waves. The upper cover and the valve seat together form an exhaust cavity. The housing assembly is provided with a gas compression assembly, and an exhaust port is opened on the upper end of the housing assembly. The output shaft of the motor is connected to the eccentric cap of the gas compression assembly. The left air inlet and the right air inlet of the motor, the output shaft of the motor is connected to the non-central position of the eccentric cap, and the eccentric cap blocks the left air inlet or the right air inlet during the rotation process. Moreover, the gas compressed by the gas compre...

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Problems solved by technology

For this reason, the micro air pump of this common structure has the following three defects: (1) Since the upper cover and the valve seat are welded together by ultrasonic welding, the welding position cannot be guaranteed to be 100% sealed. Gas phenomenon; (2) Since the gas is directly discharged through the one-way exhaust valve, the vibration noise of the one-way exhaust valve is easily transmitted directly during the period, resulting in a loud noise when the air is output; (3) Due to the air intake Only a single air inlet can always work, and the air intake of the air intake chamber in the shell assembly is insufficient, resulting in large air intake resistance of the pump body, severe vibration and loud noise when the pump body is working

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