Turbofan with double-impeller noise reduction structure

Abstract

The invention relates to the technical field of breathing machine accessories, in particular to a turbofan with a double-impeller noise reduction structure. The turbofan comprises a centrifugal fan main body and an outer rotating cylinder axially and fixedly installed on a rotating shaft at the upper end of the centrifugal fan main body. According to the turbofan with the double-impeller noise reduction structure, a lateral assembling frame internally provided with internal adjustable blades is fixedly connected to the arc-shaped surface of the outer side of the outer rotating cylinder, the wind direction of the centrifugal fan is adjusted by adjusting the angles of the internal adjustable blades, and therefore, the application range of the turbofan is wider; a detachable elastic extrusionlimiting device is arranged on the inner side of the outer rotating cylinder to conduct elastic extrusion limiting on the internal adjustable blades, people can conveniently disassemble and replace the internal adjustable blades, and the later use cost is reduced; and the number and the separation gap of the blades can be conveniently and automatically adjusted according to the rotating speed, sothat the linkage performance of the turbofan is improved, and the turbofan is quite simple and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of ventilator accessories, in particular to a turbo blower with a double impeller noise reduction structure. Background technique [0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients. [0003] Ventilators are divided into controlled mechanical ventilation (CMV) and assisted mechanical ventilation (AMV) according to the type of use, and are powered by an internal centrifugal fan, which is mainly composed of a volute, an impel...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, provide an improved turbo fan with double-impeller noise reduction structure, solve the problem that most of the blades on the current centrifugal fan are integrally fixed structures, and cannot Changing the number, specifications and angles of its centrifugal blades also cannot change the wind direction and air volume, which limits its scope of application.

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