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Propeller of a pulsed airflow generator, in particular for a portable blower

A pulsed airflow and propeller technology, applied in the field of portable hair dryers and electric portable hair dryers, can solve the problems of large variation between batches, insufficient component accuracy, low blade twist, and achieve the effect of simple manufacturing method and good repeatability

Active Publication Date: 2014-02-05
PELLENC SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, parts obtained by such materials and methods have insufficient precision and large batch-to-batch variability
[0010] It is expected to overcome these disadvantages by proposing an axial propeller with blades fixed on a cylindrical hub, or with low blade twist, or by reducing the number of blades, but this reduces the efficiency of the propeller thus obtained

Method used

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  • Propeller of a pulsed airflow generator, in particular for a portable blower
  • Propeller of a pulsed airflow generator, in particular for a portable blower
  • Propeller of a pulsed airflow generator, in particular for a portable blower

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Embodiment Construction

[0043] An interesting but by no means limiting embodiment of a propeller according to the invention is described with reference to said drawings.

[0044] The high-efficiency axial propeller 1 according to the invention is assembled from two parts joined together coaxially in succession, said two parts being:

[0045] - a first front part 2, which is formed in one piece and consists of a plurality of helical blades 3 connected to a central ring 4;

[0046]- a second rear part 5, which is tapered in its entirety and is likewise formed from a single piece;

[0047] The central part 6 of the fitting has the shape of a continuous cone, or more precisely a frustum of a cone, which forms the rear of the air inlet cone.

[0048] Advantageously, the front part 2 and the rear part 5 are assembled by fitting.

[0049] According to an interesting mode of implementation, the helical blades 3 are fixed on the central ring 4 by means of spaced blade feet 3a, and the rear part 5 comprises ...

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Abstract

The invention relates to a propeller (1) of a pulsed airflow generator, in particular for a standalone portable blower, of the type made up of the assembly of two parts coaxially adjoining one another, i.e.: a first front part (2) made as a single piece and comprising a plurality of twisted blades (3) connected to a central ring (4), and a second rear part (5) with a generally conical shape also made as a single piece, the central portion (6) of said assembly having a conical shape and making up the rear portion of an air-inlet cone, said propeller being characterised in that said first front part and second rear part are secured by means of a clamping device (10) made up of a hub including two parts (11, 12) assembled coaxially and between which said two parts (2, 5) that make up the propeller (1) are clamped, said hub being rotatably secured to the latter and maintaining said front and rear parts in the assembled position thereof.

Description

technical field [0001] The present invention relates to a propeller for pulsed airflow generators, in particular for portable hair dryers. Of particular interest is that it can be applied to electric portable hair dryers. Such devices are typically used to "sweep" dead leaves or litter that may cover various surfaces such as lawns, city traffic roads, outdoor parking lots, sports surfaces, game areas, and the like. [0002] The invention also aims to propose a portable device, in particular a self-contained (autonomous) portable hair dryer, comprising a propeller of a pulsed airflow generator produced by the method. Background technique [0003] Axial fans used to realize blowing machines comprise a propeller consisting of a plurality of rectilinear or helical radial blades fixed by means of their bases on a central hub. [0004] Blowers of this type utilizing straight blades are particularly inefficient, so that the use of propellers consisting of more efficient helical b...

Claims

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Application Information

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IPC IPC(8): F04D29/32F04D29/38F04D29/64F04D29/02
CPCF04D29/34F04D29/388F04D29/023F04D29/329F04D29/646F04D29/384F04D29/64F05D2230/23F05D2300/12F05D2300/43
Inventor R·佩朗P·吉尔伯特
Owner PELLENC SA
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