FR2616162A1 - DRUM LAUNDRY WASHING MACHINE PROVIDED WITH WATER DISTRIBUTION MEANS - Google Patents

Abstract

The hollow vanes 11 responsible for driving the laundry in rotation during the rotation of the drum 10 are provided with a longitudinal slot 13 for taking water from the bottom of the tank 14 and with spaced holes 12 to let it fall from there. high, by gravity, on the laundry below, while a level sensor 16 connected to the water supply means 17 keeps substantially constant the level of water in which the drum 10 partially plunges during its rotation .

Description

The invention relates to an improved washing machine comprising

  a drum provided with means allowing a uniform distribution of the washing water on the laundry

contained in this drum.

  Washing machines are known in which the laundry contained in the perforated rotating drum is soaked by the amount of water contained in the tank inside

  which the drum is called to turn.

  In order to be able to rotate the laundry contained in the drum and to ensure proper wetting, the inside of the drum has a series of ribs or internal vanes arranged at regular intervals and

extending axially.

  In a washing machine of this type, the amount of washing water used is independent of the weight of the

linen introduced into the machine.

  Thus, it very often happens that when the machine is not operating at full load, the water consumption is excessive and, consequently, the energy consumption for

The heat is excessive too.

  To overcome this drawback, washing machines have been proposed in which the washing water

  is sprayed onto the laundry through a plurality of nozzles

  mented by a pump which draws water from a food tank

  water ment separated from the tank containing the drum.

  The wash cycle can be programmed according to

the amount of water to be washed.

  Although the operation of this type of machinery

  is satisfactory, with low consumption of water and energy

  electric machine, these machines nevertheless have a fairly high cost price due to the need to install a circuit

  separate for pumping water to the sprinkler nozzles

  ge as well as a water quantity control system

  charged according to the weight of the laundry treated.

  The main object of the invention is to remedy these drawbacks of the known technique by providing a washing machine which has the advantages of water jet machines at the same time as those of immersed drum machines. This object is achieved, according to the present invention, by a washing machine of the type comprising a perforated drum to contain the laundry and rotating inside a tank, part of which is immersed in a certain amount of water of washing introduced into the tank by appropriate supply means, the inside of this

  the drum being furthermore provided with retaining means

  ble to rotate the laundry during the rotation of the drum, this machine being characterized in that the retaining means are formed so that they take water from the bottom of the tank and drop it from above, by gravity, on the laundry below, means for detecting the water level connected to the water supply means being provided to maintain a level

  substantially constant the amount of water in which the tam-

  bour partially dives during his rotation.

  Preferably, the retaining means are constituted

  killed by vanes or hollow sections with sets of openings

  vertices capable of taking washing water which is

  ve at the bottom of the tank and then pour it in rain on

  the laundry inside the drum.

  Preferably, these hollow blades have a substantially triangular cross section and they are perforated along their apex closest to the axis of rotation of the drum, while along their base which is close to the perforated peripheral wall of the drum , they present

a longitudinal slot.

  The structural and functional characteristics of the invention, as well as its advantages over the known technique, will be better understood on reading the

  description which follows of a washing machine

  produced in accordance with the invention; this description is

  given by way of example, with reference to the appended drawings in which:

  - Figures 1 and 2 are views in vertical section-

  the of a washing machine according to the invention, showing the drum respectively at two different positions of its operation, - Figure 3 is a partial view in perspective

  showing better The drum shown schematically in Figures 1 and 2.

  The washing machine The laundry according to the invention has a general structure known to those skilled in the art and it includes a laundry drum 10 provided with a plurality of blades 11, extending axially at intervals

  regular along the inside of the cylindrical wall

  that perforated constituting this drum. The vanes 11, the number of which can vary according to the requirements, can be produced on said inner face of the perforated wall, either in

  being in one piece with it, that is to say by being

  tees. Their profile is generally triangular in cross section and they extend over the entire axial length of the

washing machine drum 10.

  These blades have a rounded apex, that which is closest to the axis of rotation of the drum, along which is provided a plurality of holes spaced% 12, the shape of which may be any, and a base formed by the same wall. drum 10 (or in any other equivalent way), having a longitudinal slot 13 through which these hollow vanes can take a certain amount of the washing water which has been introduced into the bottom of the tank 14 inside The drum is rotated

  by partially immersing in this water.

  Thus, during the rotation of the drum, the blades 11 are alternately and cyclically immersed one at a time in the water which is at the bottom of the tank 14 and this water fills the interior volume 15 of the blade 1i by passing to

through the longitudinal slot 13.

  Each blade which is filled with water during its lower stroke, is then driven upwards as a result of the rotation of the drum 10 and, during its upper stroke, it pours uniformly in rain, through the holes 12, its contents water on the laundry inside

drum 10.

  The rotation of the drum 10 continuing, dawn, main-

  holding empty, goes back down to the bottom of the tank 14 to fill up again and start this rain washing cycle. A level detector 16, connected to a solenoid valve 17 which controls the admission of water inside the tank 14 ensures maintenance at a substantially constant level of

  the water at the bottom of the tank 14.

  Consequently, the blades 15 continue to spray from above, and in a constant manner, the laundry which is in the drum 10 throughout the duration of the rotation of

this last.

  The advantages of a washing machine produced in accordance with the invention can be summarized as follows: a) the consumption of water is reduced compared to conventional machines; b) water consumption is proportional to the quantity of laundry treated; c) the energy consumption required to heat the washing water is reduced compared to conventional machines; d) the consumption of electrical energy is proportional to the quantity of laundry treated; e) the dissolution of the detergent products is better, resulting in an improved washing effect thanks to greater agitation of the detergent powder in water, without otherwise being modified the mechanical bubbling, and consequently

wear and tear on the laundry.

Claims (3)

  1. Washing machine of the type comprising a   perforated drum (10) to hold the laundry and turn inside   inside of a tank (14), part of which is immersed in a certain quantity of washing water introduced into the bottom of the tank (14) by suitable supply means (17), the inside of this drum (10) being furthermore provided with retaining means (11) capable of rotating the laundry during the rotation of the drum (10), characterized in that said retaining means (11) are constituted so that '' they can take water from the bottom of the tank (14) and let it fall from above, by gravity, onto the laundry below, means for detecting (16) the level of the connected to the means of supplying   water (17) being provided to hold at a substantially consistent level   as the amount of water in which the drum (10) plunges partially during its rotation.   2. Washing machine according to the claim   tion 1, characterized in that said retaining means (11) consist of hollow blades and provided with sets of openings (12,13) capable of taking washing water which is located at the bottom of the tank (14) and pour it in   rain on the laundry inside the drum (10).   3. Washing machine according to claim 2 characterized in that the hollow blades (11) have a   substantially triangular cross section, they are perfo-   rees of holes (12) along their apex closest to the axis of rotation of said drum (10) and they have a longitudinal slot (13) Along their base which is close   of the perforated peripheral wall of the drum (10).