Air purifier

Abstract

An air purifier comprises a main air purifier body and a fan for sucking air actively, wherein the main air purifier body is tightly attached to the mouth and the nose of a person and provided with a casing assembly and a filter assembly arranged in the casing assembly; the fan is arranged on the casing assembly, used for sucking air into the casing assembly from outside, fixedly mounted on the casing assembly, located behind air flow of the filter assembly and provided with an axial flow guide blade unit, a front cover plate, a centrifugal impeller and a motor; the axial flow guide blade unit is provided with a central ring and multiple axial flow guide blades arranged on the outer wall of the central ring in a surrounding manner; the centrifugal impeller is arranged in space between the front cover plate and the axial flow guide blades; the motor is fixedly mounted on the casing assembly, and an output shaft of the motor is connected with the centrifugal impeller. A boost process is realized by the centrifugal impeller, large air outlet flow and uniform air outlet are realized by a radial-to-axial annular cover and the axial flow guide blade unit, then the fan of the whole air purifier is wide in variable working condition range and high in efficiency, and user experience is better.

Description

technical field [0001] The invention relates to an air purifier and belongs to the field of machinery. Background technique [0002] In the head-mounted air purifier that actively sucks air to filter, it is necessary to use a fan to suck air into the air filter layer for air filtration, and the filtered air is supplied to people's mouth and nose for breathing. [0003] Although the axial fan designed by Tang Binhong (Chinese Patent, Axial Fan for Mask and Mask, CN205446182U, Publication Date 2016.08.10 and Chinese Patent, Active Protective Mask for Children, CN205569545U, Publication Date 2016.09.14) is more common The wind power of the fan is enhanced, which can overcome the resistance of the filter layer, making it convenient for children with breathing difficulties and the frail elderly to wear the air purifier. However, since it adopts the form of axial flow impeller (that is, the axial flow fan blade in the invention patent) + axial guide vane (that is, the axial flow ...

AI Technical Summary

Problems solved by technology

However, since it adopts the form of axial flow impeller (that is, the axial flow fan blade in the invention patent) + axial guide vane (that is, the axial flow fan stator blade in the invention patent), it is found that this However, the wind pressure it can achieve is still not enough to completely overcome the resistance of the filter layer (such as the filter cotton used in practice), especially when the haze is severe, tiny particles will The filter layer will be blocked quickly and the resistance will be greater, and the efficiency of the fan in this form is low

[0004] A general and usual method to solve the above problem of insufficient air pressure is to use the air outlet volute to boost the pressure. The fan installed with the air outlet volute can achieve a higher wind pressure. However, due to the uneven circumferential shape of the air outlet volute, the air outlet If it is small, it will lead to insufficient air flow and uneven air outlet around the outlet, and will make the working range of the fan narrow, low efficiency, and high energy consumption. In this case, the power capacity of the air purifier must be increased accordingly when wearing the head. Not only increases the cost, but also increases the weight of the purifier and affects the consumer experience

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