Process for removing spots from clothes in laundry machines with a vertical shaft

Abstract

A process for removing spots from clothes in laundry machines with a vertical shaft comprising the steps of: a—supplying a washing liquid to a load of soiled clothes inside a perforated basket (2) for containing clothes and provided internal to a tub (1) that is supplied with washing liquid until reaching a predetermined level, which is substantially lower than the lowest laundering level and compatible with the load of clothes; b—submitting this load of clothes to at least one agitation period during a certain first agitation time interval; c—maintaining said load of clothes at rest after a respective agitation period has elapsed and during a predetermined first rest time interval, sufficient for the temperature of the washing liquid to reach a value necessary to allow the activation of at least one of the enzymatic and bleaching functions of the washing liquid; d—submitting the load of clothes to a subsequent agitation period during a certain second agitation time interval, sufficient to provide a certain cleaning of the load of clothes, but insufficient to cause a relevant drop in the temperature reached by the washing liquid.

Description

FIELD OF THE INVENTION [0001] The present invention refers to a process for removing spots from clothes in laundry machines with a vertical shaft and which presents a perforated basket to contain the clothes to be laundered. BACKGROUND OF THE INVENTION [0002] In conventional laundry machines with a vertical shaft and with a laundering system by agitation, the laundering cycle has a water heating system usually provided in a bottom portion of a tub, inside which is provided the perforated basket, said water heating system containing a resistance of about 1500 W, which actuates during the soaking step of the laundering cycle to increase the temperature to about 45° C. [0003] Among the conventional constructions for laundry machines are those with the capacity to wash 5 kg of dry clothes and those with the capacity to wash 7 kg of dry clothes. These machines generally present laundering programs, each for a determined intensity of laundering action, which can be selected according to t...

AI Technical Summary

Benefits of technology

[0009] Thus, it is an object of the present invention to provide a process for laundering clothes, which allows an improved spot removal from the clothes to be laundered.

[0010] Another object of the present invention is to present a process as mentioned above, which allows, within the existing limitations of installation and energetic consumption, to obtain temperatures for laundering clothes higher than those reached in the existing laundry machines of household use, without requiring to modify the capacity of the resistance presently used in the available laundry machines. SUMMARY OF THE INVENTION

Problems solved by technology

Although the known laundering programs lead to good results in cleaning the common soil from the clothes, the quality of the spot removing operation is not the desired one.

However, the known constructions cannot increase the temperature of the washing water as a function of the aspects presented below.

The laundry machines with a vertical shaft require a large quantity of water to effect the laundering of clothes.

The high energy consumption and mainly the long time needed to heat this volume of water by means of the electrical resistance available in these machines make the use of temperatures above 45° C. impracticable.

On the other hand, the use of a more powerful resistance to reduce the heating time and increase the temperature of the volume of water requires a special electrical installation in residences, making this solution unfeasible.

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