KR20060116225A - Front-loading washing machine with rotating washing drum - Google Patents

Abstract

The drum shell (20) has flow perforations (22) in the rear zone thereof, for exchange of the washing liquor (13) between the interior of the washing drum and the interior of a liquor tank (4), enclosing the above and, in the operating position for the washing machine, the lower shell line increasingly differs from a horizontal, on rising towards the front. Hollow, long lifting bodies (12), which are embodied to take liquid amounts from the deepest position thereof and raise the same, on rotation of the washing drum (5), to a raised position within the washing drum and to release the same from said raised position into the interior of the washing drum, inadequately wet the pieces of washing in the front region. The above effect is increased with reduced amounts of laundry items. According to the invention, the amount of water discharged in the interior can more effectively be applied to the laundry items, whereby the drum shell (20) has a total surface of flow perforations (23, 24), in the front region (19) thereof which measures about a quarter to a third of the total depth of the washing drum, reduced by at least 50 % relative to the rear region (21) thereof.

Description

FRONT-LOADING WASHING MACHINE WITH ROTATING WASHING DRUM}

The present invention relates to a front-loading washing machine having a rotating drum, the drum shell of the washing machine for exchanging detergent solution between the interior of the liquid container surrounding the drum and the interior of the washing drum. A flow perforation is provided, wherein the bottom shell line at the operating position of the washing machine is different from the horizontal line rising forward and comprises a hollow carrier elongated carrier, the carrier drum When discharging the detergent solution from the rotated and raised position into the laundry drum, it is configured to lift and absorb the solution.

The laundry which has to be washed by the washing machine for a long time according to the prior art is mechanically treated to soak in detergent and to remove contamination. By the drum washing machine the function is performed by a washing drum arranged horizontally in the detergent container for accommodating the laundry, the position of the drum is changed during the rotational movement, and as a result the laundry is processed inside the drum. In order to support this function, an extension extending over the washing drum cover, rib-shaped carriers are arranged therein, and the configuration transverse to the direction of movement of the washing drum cover is provided. Known. Carrier ribs of this type fixed inside the washing drum are already known from DE-PS 8 347 of 1879 and have long since been mounted in drum washing machines with almost no exception for washing operations.

In addition, several drum washing machines are known in which the carrier is inclined and moves substantially along the thread within the cover of the laundry drum. As a result, the carrier forms an inclined arrangement in all cases to transport the laundry, for example mechanical energy within the laundry. For example, drum washing machines of this type are disclosed in DE-PS 537 759, DE-PS 576 523, FR 1 136 981 and DE 44 12 718A1. Drum washing machines are known in which the inclined arrangement of the carriers carries laundry to the inside of the drum by the rotational movement of the drum. In the drum washing machine known from document DE-GM 88 04 246, the loading of laundry is facilitated by this method.

In addition, a washing machine according to the front end of claim 1 is disclosed in DE 199 25 917 A1, which sprays water from an elevated position through an opening to a laundry located at the bottom, and at the bottom of the detergent container for raising water In the region the carrier draws water. At the same time, when the lower lid line is positioned at an angle, the carrier moves the absorbed solution forward and the raised solution is no longer reached with a small amount of laundry moved to the rear region. As a result, the process of soaking a small amount of laundry is delayed and ineffectively formed because the discharged solution flows through the flow opening of the drum cover before reaching the laundry.

 It is therefore an object of the present invention to improve the wettability of a small amount of laundry in the washing machine described above.

This object is achieved in accordance with the invention, wherein the front region has a size of approximately 1/4 to 1/3 of the total depth of the washing drum, and the drum cover covers the entire region of the flow hole, which is approximately 50% reduced compared to the rear region. Have In this way the solution is pulled up by the carrier, transported forward with respect to the relatively small perforated area, and then flowing towards the laundry on the inner surface of the lid. This makes the process of soaking relatively short compared to the prior art and effectively wets small amounts of laundry. In addition, the exchange of solution is increased over the entire washing process.

Since the rear perforated surface is widely covered by the laundry during rotation, and the air exchange is formed with the interior of the detergent container surrounded by the front perforated surface, the method according to the invention is called a radial square pump of a rotating laundry drum. It causes a reduction in the radial pumping effect, where air is sucked from the inlet at the front, from the detergent container, and again compressed into the detergent container by an uncovered flow hole. This effect entrains the spent detergent from the sleeve area of the inlet and undesirably wets the laundry again.

The effect of the method according to the invention is best realized when the front region does not have a flow hole.

According to a preferred embodiment of the present invention, the flow holes in the front region are formed to be the same size as the flow holes in the rear region but a small number or the flow holes in the front region are flow holes in the rear region. If we have a relatively small internal diameter, wetting is clearly accelerated. For example, for relatively high detergent levels inside the detergent container while rinsing laundry, a relatively small number of flow holes in the front region are useful.

In one embodiment, it is particularly preferred that no flow holes are arranged in the front region and that the front region without holes is provided with an incidence of the groove structure. The incidence will be positioned in a way that promotes the discharge of wasted water. According to a preferred embodiment of the present invention, the incidence of the recess structure is directed towards the flow gap in the rear region, and it is particularly preferred that the boundary is formed in front of the rear region.

1 is a side view showing a vibration unit of a washing machine according to the invention, consisting of a laundry drum with a carrier and a detergent container;

2 is a plan view of a metal section consisting of a sheet of a cover showing a first variant of a laundry drum constructed in accordance with the invention;

3 shows a second variant according to FIG. 2;

4 shows a third variant according to FIG. 2;

FIG. 5 shows a fourth variant according to FIG. 2; FIG.

In the washing machine shown in FIG. 1, a corrugated tube 2 and a vibration unit 1 are shown having a discharge pump 3 connected to the bottom.

The unit 1 suspended in a vibrating manner, not shown, consists of a detergent container 4 and a washing drum 5 mounted concentrically about it. The vibrating unit 1 is positioned obliquely in the housing of the washing machine such that the rotating shaft 6 of the washing drum 5 is formed, for example, by 5 ° toward the front inlet 7 of the detergent container 4, or It is formed in a suspended state. As a result, the inlet is formed in an inclined structure to be convenient for the user.

In the hub 8 the washing drum 5 is mounted according to the known art by means of stable pins 10 on the back base 9 of the detergent container 4. The laundry drum has a cylindrical structure. The lower cover line 11 of the washing drum 5 forms an upward structure toward the front at an angle of the rotation shaft 6. Three carriers 12 are uniformly distributed in the inner shell of the drum cylinder. On the one hand while the washing drum 5 is rotating, according to the known art the carriers raise the laundry, so that the laundry is mechanically processed, dropping from the relatively higher position back to the drum lower position after the upward movement, Contaminated parts are delivered with the detergent.

However, during this washing process, the carriers 12 pour out the solution, and the fluid forms a part, i.e., a free solution 13, and at the rear lower part of the detergent container 4 in the entire inner space of the detergent container. Form a fluid in place. The next time the carrier is located at the deepest position in the circular path of the carrier 12, a portion of it is separated from the solution by each carrier 12 above the inlet 14 at all times. Usually the carrier 12 is mounted in an inclined structure with respect to the rotational axis of the washing drum 5 with respect to a right angle position. In addition, the carriers 12 are configured to be concave bent in the drum rotation direction. In conclusion, while the drum rotates, the solution located inside the carrier 12 and the raised solution is raised upwards, and the inside of the carrier with the same mass as the elongated bent shape of the carrier is inclined forward by the rotational operation. Forwards from the front.

In the front region on the convex arc shaped flank 15 of the carrier 12 the carrier 12 has various openings 16 for delivering a portion of the pumped solution. Within the convex flank 17, the carrier does not have the openings or has only a few openings, only in the forward and very close position of the raised edge 18. It is thus possible to spread a significant amount of the solution which has been pumped onto the part of the laundry lying ahead. At the same time, however, due to the inclined position of the rotating shaft 6, a considerable amount of the solution is transferred onto the laundry part which lies further rearward in the washing drum 5.

It is shown in FIG. 1 that the lid of the washing drum 5 is penetrated by flow perforation so that a continuous exchange of solution can occur between the solution 13 in the free state and the interior of the rotating washing drum 5. Not shown. This is of great importance for the good cleaning effect of the laundry. It is important to have as much solution as possible into the laundry per unit of time. However, if the flow holes are arranged in the front region of the drum cover according to the washing machine described above, as in the prior art, quite a lot of solution poured over the laundry by the pumping carrier wets the laundry and is moved out of the drum again in this position. It will flow straight through the flow hole without this. This effect is most pronounced when a relatively small amount of laundry is placed inside the drum, which means that if a small amount of laundry exposes the top flow hole, most of the poured water will not come into contact with the laundry at all. It is discharged through the flow hole.

In order to avoid this problem, the washing drum of the washing machine formed according to the present invention has no flow hole in the front region or has a reduced number of flow holes or reduced size, thereby causing a swelling amount that is not absorbed by the laundry. The solution is placed at the bottom of the front region of the laundry drum for a sufficiently long time until it is absorbed by the laundry located above.

In the embodiment of the invention according to FIG. 2, unlike the rear region 21, no flow hole is provided in the front region 19 of the drum cover 20, and the rear region 21 has a flow hole ( 22) is arranged. The surface is formed completely impermeable to water, and the solution impinged on the surface from the top can remain useful for soaking the laundry for a very long time.

However, during rotation, if the laundry is drained or overflowed to a high level, water or solution will be prevented from standing on the bottom of the washing drum for too long, which would lead to a further improvement of the present invention. All areas are preferably reduced compared to the area left. This can be implemented by reducing the same number of reduced cross-section flow holes 24 as shown in FIG. 4 or the same number of flow holes 23 of the same size as shown in FIG. Any type of mixed form in which flow holes having a plurality of different diameters or cross sections can be used is implemented under the spirit of the same invention.

 During the rotation, it is important to remove the spent water from the washing drum as soon as possible. This may be helpful by providing a recess-shaped indentation 25 in the front region 19 towards a region 21 provided with a conventional flow hole 22. In such a case, depending on the direction of rotation, the groove can be spirally wound in one direction or in both directions. In order to immediately remove the water collected in this way, it is preferred that the groove reaches the top flow hole in the area 21 of the conventional flow hole.

Claims (8)

The drum cover 20 is provided with a flow hole 22 for exchanging the detergent solution 13 between the inside of the detergent container 4 surrounding the drum and the inside of the washing drum, the bottom cover line at the operating position of the washing machine. Is different from the horizontal line which rises toward the front, and comprises an elongated carrier having a hollow structure, which carries the solution as the laundry drum rotates and discharges the detergent solution into the laundry drum 5 from the raised position. In a front-loading washing machine configured to pull up and absorb liquid from the lowest position, comprising a rotating drum (5), The front region 19 has a size of approximately 1/4 to 1/3 of the overall depth of the washing drum 5, and the drum cover 20 has a flow hole 23 that is approximately 50% reduced compared to the rear region 21. Washing machine having a total area of 24). Washing machine according to claim 1, characterized in that the front region (19) is free of flow holes. 2. Washing machine according to claim 1, characterized in that the flow holes (23) in the front region (19) are the same as the size of the flow holes in the rear region (21) but the number is small. Washing machine according to claim 1, characterized in that the flow holes (24) in the front region (19) have a smaller inner diameter than the flow holes in the rear region (21). 3. Washing machine according to claim 2, characterized in that the holeless front region (19) is provided with an embossing (25) in the form of a groove. 6. The washing machine according to claim 5, wherein the groove-shaped relief (25) is formed at the front end of the rear region and is formed toward the flow hole (22) of the foremost row in the rear region (21). 7. Washing machine according to claim 5 or 6, characterized in that the relief angles (25) in the form of two adjacent recesses each have a distance which increases from front to back. 8. Washing machine according to any one of claims 5 to 7, characterized in that the indents (25) in the form of grooves are arranged in a spiral form with respect to the bearing axis (6) of the washing drum (5).

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