Pressurized mixed flow generator and portable bladeless fan provided with same

Abstract

The invention provides a pressurized mixed flow generator for a portable bladeless fan, which comprises a shell, an air inlet part is arranged on the rear side of the shell, an air outlet part is arranged on the front side of the shell, and the air inlet part and the air outlet part are communicated in the shell; the pressurizing piece is connected with the front side of the shell; the mixed flow fan is located in the shell and connected to the rear side of the pressurizing piece, and the mixed flow fan rotates around a rotating shaft to generate airflow; a pressurization flow guide channel is formed between the pressurization piece and the shell and between the mixed flow fan and the shell, the radial sectional area of the pressurization flow guide channel at the air inlet end is larger than the radial sectional area of the pressurization flow guide channel at the air outlet end, and air enters the pressurization flow guide channel from the air inlet part. And pressurized mixed flow is formed in the pressurized flow guide channel and then is discharged from the air outlet part.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a pressurized mixed flow generator with large air volume and high air pressure and a portable bladeless fan equipped with the same. Background technique [0002] The common fans in daily life are axial flow fans. The characteristic of axial flow fans is that the path of the wind from the air inlet to the air outlet will not deviate radially, which is basically equivalent to straight in and straight out. After entering the axial flow fan at the end axially, it leaves axially from the air outlet end. This way the wind resistance is small, so the loss of air volume is small. That is to say, by default, those skilled in the art will use axial-flow blades to manufacture axial-flow fans if they want to ensure that the air volume loss is small. Because of this, those skilled in the art have not put forward ideas to solve this technical problem. By default, using axial flow fans will not m...

AI Technical Summary

Problems solved by technology

[0003] However, unlike other companies in this field who pursue low R&D costs and quickly produce products to seize market profits, the inventors of the present application have been deeply involved in the field of fan technology, and have a deep understanding of fluid theory, fan product markets, and user pain points. After investigation and understanding of demand points, and after research on the industry, it was found that, taking hand-held fans or ordinary desktop fans as examples, although the existing axial flow fans have small wind resistance and small air volume loss, they have not taken into account at all. Another technical problem is that the air pressure of the axial flow fan is low and the air supply distance is short

That is to say, although there is no loss of air volume, there is no incremental supplement, and the air supply distance is difficult to guarantee. Therefore, the general use distance of ordinary portable fans is about 1-1.5 meters. If you are a little farther away, you cannot experience the blowing effect The refreshing feeling of enjoying the cool

At the same time, because the fan blades of the axial flow fan are visible, infants and young children are likely to cut their fingers when using them, or if toys, chopsticks and other foreign objects are inserted into the fan blades, it is easy to break or even fragments fly and cut the human body. The fan has completely failed to meet the user's safe use needs

[0004] Moreover, the inventors of the present application have found that some portable fans use centrifugal fan blades to overcome the difficulty of low wind pressure. However, after the wind enters the centrifugal fan axially from the air inlet end, it leaves radially from the air outlet end, and the wind direction changes greatly. The loss is very serious, and the wind effect is difficult to meet the user's requirements

[0005] In addition, although the industry is well known, since Dyson launched the bladeless fan, in order to achieve the use of air volume, it is made of ultra-high-speed fans, so its volume is generally 30*30*150CM 3 (cubic centimeters), occupies a very large area and is inconvenient to use and carry. In addition, the price of Dyson’s fan products is generally about 3,000-8,000 yuan, which is very expensive for ordinary families or individuals. It can be said to be a luxury level, so this is of no use value for ordinary users

[0006] In recent years, there have also been products and patents that imitate Dyson's bladeless fans, and they are also used in portable scenarios such as hand-held. However, because the products cannot be thinned, or the air volume and wind power are sacrificed due to excessive pursuit of lightness, they cannot meet the needs of users. Use requirements, especially if the fan is used in a diagonal flow fan, the sharp and harsh noise caused by the motor and wind noise cannot be accepted by users, so it is impossible to form a fan product with excellent performance

[0007] Due to the above-mentioned technical problems and the existence of technical prejudices, the existing portable fans can no longer meet the needs of users. At the same time, with the improvement of living standards and the enrichment of fan application scenarios, people have more and more requirements for portable fans that can be carried with them. After several years of research and experiments, the inventor of the present application proposed a portable bladeless fan with a volumetric A small portable fan is designed with a large air volume, high wind pressure and low noise structure to solve many of the above-mentioned problems in this technical field

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