Improved airflow system & apparatus and method for airflow system

Abstract

An airflow system enhances airflow in a hand-drying apparatus which expels a stream of sterilised, hot air for drying of hands. Inside the apparatus, the airflow is decelerated by one or more filters. Therefore, the system is provided with an airflow-pathway that is progressively smaller along its pathway in respect of flowthrough cross-section. The airflow is enhanced by flowing initially through a larger part of the airflow-pathway, and subsequently through a smaller part of the airflow-pathway after which the airflow exits the apparatus. To enhance the airflow, a universal commutator motor is used to drive an appliance that provides air movement. The motor comprises magnetic field generating means, a rotating armature adapted for rotational motion in operative association with the magnetic field. A ratio of magnetic field strength at the armature to the magnetic field strength within the magnetic field is less than about 1 to 1.

Description

[0001] related application [0002] This application claims priority to Australian Provisional Patent Application No. 2007901255, entitled "Improved Airflow System and Apparatus and Method for an Airflow System", filed on 12 March 2007 in the name of Alpha Global Holdings Pty Ltd, which The entire contents are hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to air flow systems and devices and methods for air flow systems, in particular, devices adapted to generate air flow, for example, adapted to generate a stream of sterilized air for "clean" drying conditions air dryer. In one form, the invention is adapted for use in a hand dryer and, for convenience, the following device is used to describe the invention: A germ-killing hand dryer that produces a stream of germ-free hot air especially for drying hands , where the one or more filters through which the airflow passes decelerate the airflow within the device. Howev...

AI Technical Summary

Problems solved by technology

Therefore, more powerful motors are not the most ideal solution to this problem in relation to the suction rate

[0010] Second, the faster fan motor will be more expensive, and the internal losses will be more, so that the service life of the motor will be shorter

[0011] Third, larger fan motors run hotter and tend to make more noise

[0012] Fourth, the faster fan motor will be larger, the motor is prone to failure due to overheating, and also requires a larger dryer housing to accommodate the larger motor

[0016] It is also known that a motor dealing with the above difficulties can be modified to operate outside its standard operating range and thus may malfunction

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