EP2044253A1

EP2044253A1 - Washing machine with hollow drivers

Info

Publication number: EP2044253A1
Application number: EP07765529A
Authority: EP
Inventors: Uwe Ratfisch; Wilfried Wildung; Uwe Mette
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2006-07-06
Filing date: 2007-06-21
Publication date: 2009-04-08
Anticipated expiration: 2027-06-21
Also published as: ATE449209T1; RU2413802C2; WO2008003594A1; DE102006031355A1; DE502007002069D1; CN101495694A; CN101495694B; CN201065483Y; EP2044253B1; US20090276966A1; RU2009101950A

Abstract

Washing machine with a driven drum (4) which can be rotated horizontally in a liquor container and with hollow drivers (11') which are disposed on the inside of a drum casing (41) and which, in the drum casing (41) in each case have a driver bottom (42), in which there is at least one inlet opening (14'). Portions of the liquor flow from a liquor at the bottom of the liquor container (1) through the inlet opening (14') into the cavity (13') of the driver (11'). After a further rotation of the drum (4) of the washing machine, these portions flow into a raised position of the driver (H') through outlet openings (15) in the ridge region of the driver (11') into the interior of the drum (4) of the washing machine. Due to the inventive construction of the driver (11'), the wetting may be more intensive than it is in the case of the previously known washing machines, and the washing process requires less time.

Description

WASHING MACHINE WITH HOLLOWERS

The invention relates to a washing machine with a horizontally rotatably driven in a tub laundry drum and arranged on the inside of a drum shell, hollow carriers, each having a driver base in the course of the drum shell, is introduced into the at least one inlet opening, wherein proportions a lye located in the lower vertex of the tub in the cavity of the driver flow through the corresponding inlet opening and after further rotation of the laundry drum in a raised position of the driver from the cavity via outlet openings in the ridge area of the driver remote from the driver base in the interior of the laundry drum pour out, as well as a method of operating the washing machine.

Such a washing machine is known from DE 38 03 195 A1, flows in the fleet introduced by lateral flanks of the driving rib Schöpflöcher in the cavity and pours from there with rotating laundry drum from higher position from outlet openings on the laundry. For pouring the laundry in both directions of rotation Schöpflöcher are closed by internal, movable seals. The seals of the forward in the direction of rotation Schöpflöcher be opened by the generated during the drum rotation back pressure of the liquor or free liquor, and accordingly the rear Schöpflöcher be closed. Such an arrangement is structurally relatively expensive and susceptible to wear because of the moving parts.

Another designed as a scoop driving rib is known for example from DD-PS 37 560. Here are within the Mitnehmerhöhlen blades arranged. When driving through the bottom of the sump standing sump scoop on the drum shell projecting parts of the blades Fleet that they promote in the upward movement on the arranged in the flank of the driver hole in the drum interior. Such blades and arranged in the flanks of the driver holes are not very suitable to effectively wet the laundry lying within the drum. The scooped water quantity is namely already flow when scooping under the resulting in Mitnehmerhöhe back pressure immediately after the exit of the driver from the sump on the perforation in the Mitnehmerflanken and then flow back along the inner wall of the drum to the sump, without having significantly wetted the laundry. It has already been proposed here to form the device in the driving ribs in another way, for. B. such that the scooping during the wetting phase, the free liquor - which is located in the lower drum space, not absorbed by the laundry amount of lye - promotes in a raised position and pours from there to the laundry or the laundry to be washed by Raining above.

Another washing machine drum with trained as a scoop driving rams is known from EP 0 245 721 A1, in which the Mitnehmerhöhlen arranged by a arranged in the drum contour, the blades leaves having driver base and are divided into chambers transversely to the drum axis. At least one respective airfoil is assigned to the chambers, so that the airfoils of respectively adjacent chambers are assigned to different directions of rotation of the drum and aligned oppositely to the airfoil of the adjacent chamber and wherein the scooping devices are designed and arranged so that they at the earliest from a height during the wetting phase in the area of the second eighth of the drum rotation, calculated from the lowest point, until the end of the seventh eighth of the drum rotation at the latest into the drum interior. In this arrangement, however, the entrained liquor volume of the driving ribs is comparatively small.

It is the object of the present invention to provide a structurally simple and low-wear way for effective Waschgutbenetzung trained as a scoop driving rams. This object is achieved by a trained according to claim 1 washing machine in such a way that in the cavity from the Mitnehmerboden ago in the direction W of the inflowing liquor ascending, solid barrier is present, which forms an open chamber within the cavity behind, and that the upper edge of the barrier in the lowest position of the driver is higher than the level of the liquor and the chamber located behind the upper edge can be filled with lye on further rotation of the laundry drum by overflowing the barrier.

Advantageous embodiments are, even in any combination with each other, removed from the dependent claims.

The washing machine is equipped with a washing drum horizontally rotatably driven in a tub around an axis A. In the laundry drum protrude hollow carriers that take the laundry with a drum rotation; their number is not limited and is typically three. In each driver at least one inlet opening is introduced, flow through the amounts of a located in the lower vertex (6 o'clock position) of the tub free fleet into the associated Mitnehmerhöhle; the number of inlet openings is not limited. After a further rotation of the driver in a raised position, the lye present in the driver cavity pours into the interior of the laundry drum, typically via pouring openings in the ridge region of the driver.

The inlet opening is placed in a Mitnehmboden arranged in the jacket of the laundry drum. In the Mitnehmerhöhle continues from the Mitnehmerboden rising, solid barrier is present, which forms an open chamber. Liquor flowing over the barrier is retained in the chamber. The chamber is designed and arranged so that upon rotation of the laundry drum through the free liquor or the lye supply the barrier is even filled with entering from the associated inlet opening liquor when the level of the liquor level is lower than the upper edge of the barrier. This is effected by the fact that the kinetic energy of the liquor flowing into the cavity of the driver or its dynamic pressure sufficient to overcome the barrier. During the rotation of the laundry drum by the free liquor so the liquor is flushed through the inlet opening with a kinetic energy available to the laundry drum. The lye then hits the bar she overflows and gets into the chamber behind the barrier. The barrier rises from the Mitnehmerboden, but does not have to be part of the drum contour, but z. B. be designed as an insert.

The barrier, since it does not need to be structured and no moving parts are needed, can be easily and inexpensively manufactured and inserted and operated wear. Due to the fact that the chamber can be filled beyond the filling level of the liquor supply and generally shows a good retention effect, a comparatively large amount of liquor can be carried along and poured out over the laundry. Due to the thus increased washing effect per unit time (washing efficiency), a shorter program time can be achieved, which in turn allows a reduction of the heating time and thus the energy consumption. On the other hand, alternatively, the total amount of the wash liquor can be reduced, which also causes a reduction in energy consumption and also water consumption because of the lower heating power required.

Conveniently, the height, shape and position of the barrier are chosen so that a maximum filling depending on, inter alia, the rotational speed of the drum and the filling level of the liquor results. These parameters are typically set for the various washing phases (wetting phase, rinsing phase, etc.) by a control program so that the barrier is structurally tunable to the particular washing machine.

Advantageously, the barrier is inclined away from the associated inlet opening because the alkali can flow well over the barrier, which is also conveniently present as a wall parallel to the drum shell.

The barrier may be an additional rib which is attached to the drum contour, z. B. by riveting or welding. The chamber may also be a trough-like insert in the driver, the tub bottom rests at least partially on the driver bottom. The barrier then corresponds to a wall of the tub, wherein the other wall, for example, rests against a driver flank or spaced parallel thereto or even (mit-) is formed by the Mitnehmerflanke. In another embodiment, the barrier or wall can be used as inwardly folded edge rich in the inlet opening, for example, as inwardly encircling Umbug the - preferably slot-shaped - inlet opening is formed.

To increase the inflowing amount of liquor and liquor speed, it is advantageous if the inlet opening is provided with a pump drum arranged on the outer circumference, z. B. a ladle, which opens to the direction of rotation.

If an improved laundry irrigation in both directions of rotation is desired, the drivers can be divided in a direction parallel to the drum shell in several departments, which are aligned alternately in opposite directions and only in these show the desired effect. The departments can z. B. be constructed mirrored in the direction of rotation.

In the following embodiments, the washing machine is shown schematically in more detail. In this case, functionally identical components are provided with the same reference numerals for better clarity. Show it

1 is a sketch of a section of a washing machine with horizontally rotatable laundry drum,

2 is another sketch of a conventional laundry drum in a first rotational position,

3 shows a further sketch of the laundry drum according to FIG. 2 in a second rotational position, FIG.

4 shows a sketch of a laundry drum of the washing machine according to the invention in a rotational position analogous to FIG. 2, FIG.

5 is a sketch of the laundry drum according to FIG. 4 in a rotational position analogous to FIG. 3, FIG.

6 is an enlarged detail view of a laundry drum according to the invention with a driver in a first embodiment,

7 is an enlarged detail view of a laundry drum according to the invention with a driver in a second embodiment, Fig. 8 is an enlarged detail view of a laundry drum according to the invention with a driver in a third embodiment.

The tub 1 a washing machine in Fig. 1 includes in its upper region an inlet opening 2 for liquor. The liquor may consist of water or of a mixture of detergents introduced from a detergent dispenser 3 together with feed water. The bottom of the lye container 1, which is held at the shortest possible distance from the laundry drum 4, has a depression 5 in which the radiators 6 required for heating the lye (shown in dashed lines) are arranged. At the lowest point of the recess 5 an outlet opening 7 is attached, which is kept closed by a closure body 8, as long as a (not shown) drain pump on the drain line 9 does not suck. This closure body 8 has the task of keeping the space below the drain opening 7 closed as long as there is required for washing the laundry 10 detergent within the tub 1.

Because as little as water and detergent should be used for washing, the amount of washing required for washing has been reduced so much that the laundry drum 4 is now only slightly immersed in the bottom of the tub 1 lye. However, this creates the difficulty that the stored at the bottom of the laundry drum 4 laundry 10 does not come in sufficient extent with the liquor in contact, so that the laundry 10 is wetted only very slowly and very incomplete. As a result, the washing result is in danger. The wetting of the laundry 10 with lye is improved by the use of drivers 11, which are mounted on the drum shell 41 and the turning of the laundry drum 4, for example in the direction indicated by the arrow D direction of rotation, from the standing in the recess 5 liquor stock the respective Mitnehmerhöhle 13 via equipped with scoops 12 inlet openings 14 can fill. During the upward movement of the driver 1 1, this scooped amount of liquor is first temporarily stored and then discharged via outlet openings in the ridge region of the driver 11 into the drum interior, when the driver 1 1 has reached a certain height above the lying in the drum 4 laundry 10. By the arrows R is indicated, in which way the lye raised in this way rains over the laundry 10.

In the laundry drum 4 of FIG. 2 shown in simplified form, the lowest of the three internally mounted, structurally identical driver 1 1 is just in its lowest position (lower vertex, 6 o'clock position). He dips into the free liquor at the bottom of the tub and takes about the equipped with the gill-like scooping device 12 inlet opening 14 which is incorporated in the drum shell, liquor (dotted shown) in its cavity 13. In the ridge region of the driver 1 1 outlet openings 15 are introduced, which are here above the liquor level Nv. The liquor level Nv is typically filled at a level-based fill to a predetermined value set in a wash program. By the rotation of the laundry drum 4 in the direction of the arrow D, the scooping device 12 fills the cavity 13 of the driver 1 1 higher than would be set in the static state.

Another, top left marked driver 1 1 has already reached such a high position that it leaches liquor from the outlet openings 15 into the interior of the drum, as indicated by the arrows R. The driver 1 1 shown at the top right is already emptied and, after passing through the remaining rotation, can again draw lye from the supply in the lye container 1 at the bottom.

Upon further rotation of the lower driver 1 1 (FIG. 3) as a result of the rotation of the laundry drum 4 in the direction of rotation D, it reaches a position in which the lowermost edge of the inlet opening 14 corresponds to the liquor level Nv. In this raised position of the lower driver 11 shown here, the back pressure has dropped to zero, so that the amount of liquor in the lower driver 1 1 corresponds to that in the static state, that is, the amount of liquor through the small space behind and below the edge of the inlet opening 14 is determined. The other driver 1 1 continue to rain leach or approach emptied the liquor stock.

FIG. 4 shows driver 1 1 'of a washing machine according to the invention, into which in each case a slot-shaped inlet opening 14' is arranged in a drum contour. Neten Mitnehmerboden 42 is introduced. The inlet opening 14 'is each equipped with a ladle 12'.

In contrast to the laundry drum 4 shown in Fig. 2 and 3 is now in the respective cavity 13 'in the direction of rotation D behind the inlet opening 14' from the driver base 42 and the drum shell 41 rising, solid barrier 17 is present. Through the barrier 17, an open chamber 18 is formed in the cavity 13 '. The open chamber 18 is thus limited by the barrier 17, the driver base 42 and an edge of the respective driver 1 1 '.

The barrier 17 of the driver 1 1 'is wall-shaped and rises from the respective inlet opening 14' starting at an angle in the cavity 13 'at. In the embodiment shown here, the upper edge 171 of the barrier 17 is in the 6 o'clock position of the driver 1 1 'higher than the set liquor level Nv. During operation of the washing machine, as indicated by the arrow W, lye (shown in dotted lines) is flushed through the inlet opening 14 'into the cavity 13'. Due to the kinetic energy of the liquor, relative to the laundry drum 4, it is possible that the liquor overcomes the height difference between liquor level Nv and the edge of the barrier 17 Ü. In other words, the liquor, due to its relative velocity, overflows the barrier 17 and is retained in the chamber 18.

4, after further rotation in the direction of rotation D. In contrast to the driver 1 1 in Fig. 3 now holds the barrier 17, the liquor in its chamber 18 back even after a decrease in dynamic pressure, when the lower driver 1 1 'has been raised to the liquor level Nv. This allows a more than 80% higher entrained liquor volume in the driver 1 1 'compared to the driver 1 1 in Fig. 3 can be achieved.

When operating the washing machine, z. B., in a wetting, washing or rinsing phase, the tub is first filled with liquor, typically level-based to a level Nv. Then the laundry drum 4 is rotated. As the entrainment passes through the liquor supply or the free liquor, liquor flows through the inlet opening (s) 14 'into the cavity 13'. If the level level Nv is lower than the bottom 42 of the driver 11 'in the 6 o'clock position, correspondingly its lower vertex, in the inventive design of the laundry drum 4, the liquor can still wash over the barrier 17 and be collected or stored in the chamber 18.

Upon further rotation of the laundry drum 4, the driver 1 1 'is brought into a raised position, in which the liquor flows from the chamber 18 to the outlet openings 15', and flows through them into the laundry drum 4.

The outlet openings 15 'are preferably in the upper region of each driver 1 1', the ridge region. This ensures that a high entrained liquor volume does not rain out of the driver until it is far above the laundry.

The inlet opening 14 'may be a single opening, e.g. B. slotted with or without gills, or there may be more inlet openings per Mitnehmerboden 42, z. B. several slots or holes.

The driver 1 1 'can be divided into parallel to the Mitnehmerboden 42, which is also parallel to the longitudinal axis of the driver 1 1', arranged compartments. This is particularly advantageous if the laundry drum 4 is to perform the moistening process in both directions of rotation. Then, for example, the compartments can be effective alternately in opposite directions of rotation, for. B. by alternating to a direction of rotation reversed arrangement of the design features.

Of course, the barrier is also advantageous in the retention of liquor in the driver when the liquor level Nv when passing through the liquor supply over the edge 171 of the barrier. Although then compared to the undivided cavity 13 'entrained liquor volume is no longer so large; however, it is higher than a split cavity without a barrier.

The barrier 17 may, as shown in Fig. 6, be formed as an additional rib 19, here, z. B., riveted, but can also be fixed elsewhere. As shown in Fig. 7, but it is also possible that the barrier 17 is formed by a trough-like insert 18 in the driver 11 ', the trough bottom 201 at least partially rests on Mitnehmerboden 42. The tub can be made, for example Metal or plastic. Furthermore, the barrier 17, in particular, if it is to be formed of flat material, may be formed as an inwardly folded edge region 21 of the inlet opening, as shown in FIG. 8.

Claims

Patent claims

1. Washing machine with a in a tub (1) horizontally rotatably driven laundry drum (4) and arranged on the inside of a drum shell (41), hollow drivers (1 1, 1 1 '), in the course of the drum shell (41) respectively a driver base (42), in which at least one inlet opening (14, 14 ') is introduced, wherein proportions of a lower vertex of the tub (1) liquor through the corresponding inlet opening (14, 14') in the cavity ( 13, 13 ') of the driver (1 1, 1 1') flow in and after a further rotation of the laundry drum (4) in a raised position of the driver (1 1, 1 1 ') from the cavity (13, 13') pour out into the interior of the laundry drum (4) via outlet openings (15) in the ridge area of the driver (1 1, 1 1 ') remote from the driver bottom (42), characterized in that a cavity (13') projects from the driver base (42) in the direction (W) of the inflowing liquor rigid, solid barrier (17) which forms an open chamber (18) behind the cavity (13 '), and that the upper edge (171) of the barrier (17) in the lowest position of the driver (11 ') is higher than the level (Nv) of the liquor and lying behind the upper edge (171) chamber (18) upon further rotation of the laundry drum (4) by overflowing the barrier (17) can be filled with liquor.

2. Washing machine according to claim 1, characterized in that the barrier (17) is parallel to the drum shell (41) running wall of the associated inlet opening (14 ') arranged in the direction of rotation (D) in front of the barrier (17) is inclined, away.

3. Washing machine according to claim 2, characterized in that the barrier (17) is an additional rib (19).

4. Washing machine according to claim 2, characterized in that the barrier (17) and the chamber (18) by a trough-like insert (20) in the Mitneh- mer (1 1 ') is formed, the trough bottom (201) at least partially against the driving bottom (42).

5. Washing machine according to claim 2, characterized in that the barrier (17) as inwardly folded edge region (21) of the inlet opening (14 ') is formed.

6. Washing machine according to claim 1, characterized in that the inlet opening (14 ') with a drum shell (41) arranged ladle (12') is provided which opens in the direction of rotation (D).

7. Washing machine according to claim 1, characterized in that the driver (11 ') in a direction parallel to the drum shell (41) direction is divided into several departments whose inlet openings (14') are alternately aligned in opposite directions of rotation (D).

8. A method for operating the washing machine according to one of the above claims, characterized in that

(A) a tub (1) with liquor to a level level (Nv) is filled, which is below the edge of the barrier (17) located in the lower vertex entrainment (1 1 ');

(b) and then that the laundry drum (4) is rotated;

(C) and that during the passage of the driver (1 1 ') through the lye supply lye flows through the inlet opening (14') in the respective driver (1 1 '), the barrier (17) flushed and enters the chamber (18) where it is stored.

(d) and that on further rotation of the laundry drum (4) the driver (1 1 ') is brought into a raised position, in which the liquor from the chamber (18) to the outlet openings (15) in the driver (1 1') flows and flows through them into the interior of the laundry drum (4).