Motor, fan and filter arrangement for a vacuum cleaner

Abstract

In a first aspect, the present invention provides a motor, fan and filter arrangement for a vacuum cleaner, comprising: a motor (10); a fan (20) connected to an output shaft (12) of the motor and having an axial intake; and a filter (30, 230, 330); wherein the fan (20) is arranged with its axial intake facing the motor (10); and the motor (10) is housed within the filter (30, 230, 330). Such an arrangement makes much more efficient use of space than a conventional arrangement and allows the motor to be positioned within the filter in a reversed direction in comparison to conventional arrangements, so that clear air from the filter can be drawn over the motor before encountering the fan. This also has the beneficial side-effect of cooling the motor with the filtered air. In a second aspect, the present invention also provides vacuum cleaners (100, 200, 300) comprising such a motor, fan and filter arrangement. Preferred embodiments of such vacuum cleaners are described, including a pivotable stick vac and different hand-holdable vacuum cleaners.

Description

technical field [0001] The present invention relates to a motor, fan and filter arrangement for a vacuum cleaner and a vacuum cleaner comprising such a motor, fan and filter arrangement. Background technique [0002] Vacuum cleaners are known primarily for collecting dirt, although wet-and-dry variants capable of collecting liquids are also known. Typically, vacuum cleaners are used in domestic environments, although vacuum cleaners may also be used in other environments such as construction sites. Usually, they are electric and thus comprise an electric motor and a fan connected to the output shaft of the motor, an inlet for dirty air, an outlet for clean air and a collection chamber for dust, dirt and possibly also liquids. Electric power to the motor may be provided by a mains power supply, in which case the vacuum cleaner will further comprise a power cable which may be provided by a removable and replaceable battery pack or by one or more built-in rechargeable batterie...

AI Technical Summary

Problems solved by technology

On the other hand, however, if it is necessary to provide the filter 30 with a larger surface area or such a shape, then in order to save space and reduce the size of the area Q, the fan 20 and possibly the same part or the entire motor 10 is inserted into the area Q The alternative in 20 is also unforeseen, as this would prevent the air discharged tangentially from the fan 20 from flowing out to the clean air outlet of the vacuum cleaner, but instead cause the air discharged by the fan to hit the inner surface of the filter 30, thereby interacting with The clean air flowing in through the filter 30 is opposite and again severely reduces the efficiency of the filtering operation

[0005] Thus the conventional arrangement of motors, fans and filters shown in Figure 1 is inefficient in its use of space, but has no apparent solution to this problem itself

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