Handheld air purification breathing device and active air supply mask including same

Abstract

The invention provides a handheld air purification breathing device and an active air supply mask including the same. The handheld air purification breathing device comprises a control module, an air supply unit, and an air purifying unit for providing clean air to the air supply unit; the air supply unit includes a fan volute with a fan mounting cavity and a static pressure chamber, and a centrifugal fan arranged in the mounting cavity; a guide air way is formed between the centrifugal fan and the annular peripheral wall of the mounting cavity; the guide air way is configured to gradually increase the radial size in an air flowing path; and the static pressure chamber is positioned on the downstream side of the guide air way in the air flowing path, and is provided with a guide inclined surface for guiding the clean air to an air supply hole in the axial side part of the fan volute. The handheld air purification breathing device can realize comfortable air supply effect under the condition of not influencing the pressing head and the efficiency of the centrifugal fan.

Description

technical field [0001] The invention relates to a hand-held air-purifying breathing device and an active air-supply mask comprising the device. Background technique [0002] Under conditions of poor air quality such as smog or dust, as the most common way of protection at present, people often wear traditional masks made of gauze or paper during outdoor activities (such as walking), but this This kind of mouth mask has the deficiency that affects breathing and cannot or is difficult to effectively block small particle pollutants. As an improvement, it is also proposed in the prior art to use an active air supply mask with air purification function to replace the traditional mask. [0003] For example, Chinese patent document CN 103919304 B discloses an active air-supply mask, including a cover body; the lower part of the cover body is provided with an air-supply chamber, and a DC fan for air-supply is arranged in the air-supply chamber, and the inner surface of the air-supp...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the mask disclosed in the above-mentioned patent documents is that the air delivery channel is symmetrically arranged on both sides of the mask body and extends to the opposite position above the nose side of the nostril, and the airflow in the air delivery channel is directly injected into the breathing mask, causing air intake disorder , the local air velocity is too fast, making the nose and mouth less comfortable, and at the same time, it is easy to sweep the external dirty air, resulting in unclean breathing air

However, when the host structure is practical as a hand-held purifier, an elbow-type air nozzle needs to be inserted on the air outlet of the casing; Connected to a respirator, making it inconvenient to use and carry

[0009] The more important defect is that a vertical air duct is formed between the air suction port and the air outlet of the host structure, that is, the centrifugal fan directly blows air out of the casing from the air outlet located in its tangential direction, so that the flow rate of the blown air is very fast, Causes severe breathing discomfort when the user breathes

Even if the elbow type air nozzle is used, it cannot effectively solve the problem

Images