A low-noise air pump

Abstract

The invention discloses a low-noise air pump which comprises an upper cover, a cylinder, a piston, a base, a unidirectional inlet and outlet air distributing device, a motor, a linkage mechanism and a partition plate. The upper cover is provided with an exhaust port and an air inlet, and the piston is integrally provided with at least two air bags; the partition plate is provided with a first air outlet hole and first air inlet holes; the partition plate is fixed to a position between the upper cover and the unidirectional inlet and outlet air distributing device, the partition plate and the upper cover are hermetically matched with each other to form a sealed cavity, the air inlet of the upper cover and the first air inlet holes of the partition plate are respectively communicated with the sealed cavity, the first air outlet hole of the partition plate is communicated with the exhaust port of the upper cover, and the first air outlet hole and the first air inlet holes are respectively correspondingly matched with the unidirectional inlet and outlet air distributing device to realize a unidirectional outlet air distributing effect and a unidirectional inlet air distributing effect. The low-noise air pump has the advantages that owing to the partition plate, an airflow passage is prolonged, inlet air can be buffered, impact force is reduced, accordingly, running noise of the air pump is greatly reduced, and tilting deformation of an air inlet check valve of the unidirectional inlet and outlet air distributing device due to long-term direct stress can be prevented.

Description

technical field [0001] The invention relates to an air pump, in particular to a low-noise air pump. Background technique [0002] Air pumps have been widely used in medical and health, instrumentation, automobile, chemical, scientific research and other industries for pumping, inflating, vacuuming, pressurizing, gas circulation, gas sampling and other purposes. At present, the air pumps in the prior art generally use a motor to drive a connecting rod mechanism to pull or compress the piston, and cooperate with a one-way flow distribution device for air in and out to realize air inhalation and exhaust. Because the air pump of the prior art usually makes the gas enter the airbag of the piston directly through the intake check valve of the one-way flow distribution device of the inlet and outlet after the air intake, resulting in a shorter airflow path of the intake gas and a large impact, Thereby causing the running noise of the air pump to be louder. Contents of the invent...

AI Technical Summary

Problems solved by technology

Because the air pump of the prior art usually makes the gas enter the airbag of the piston directly through the intake check valve of the one-way flow distribution device of the inlet and outlet after the air intake, resulting in a shorter air flow passage of the intake air and a greater impact, As a result, the air pump is running noisy

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