EP2684992A1 - System consisting of a tub and a door sealing ring - Google Patents

Abstract

The system (1) is composed of caustic solution container and door sealing ring (2). The container has cap portion (3) that consists of metal-made annular disc (4) fixed at front edge of mantle of the container. The cap portion has an edge shoulder (5) via which lip seal (6) formed at door sealing ring is inserted. A gap provided between edge shoulder and lip seal ensures air or water circulation in flushing medium for inhibiting bacterial growth or crevice corrosion in connection area of materials.

Description

The invention relates to a system consisting of a tub and a door seal, wherein the tub comprises a tub container cap, which is attached from a metal annular disc attached to the front side edge of the tub, and wherein the tub container cap for connection has an edge approach, on the one on the door seal Molded grooved ring is turnable.

A lye container cap has the task on the one hand to provide a connection to the lye container shell and on the other to ensure a secure connection to the door seal. Two variants are known in the known lye container caps, wherein a first variant is a tub container cap made of steel, which has an optimal connection by means of clamping ring to the steel tub container jacket. A second variant is a suds container cap made of plastic, which is connected by means of screws, clamps or welding to a plastic liquid container jacket. This lye container cap has an optimal connection to the door seal, since a support for the door seal can be formed here.

For example, from the DE 44 29 810 A1 a drum washing machine with a vibrating unit known which is made of steel. In the tub a rotatably mounted drum is arranged, wherein the tub consists of a cylindrical shell, a rear wall and provided with a door opening front wall. In this case, a connection technique in the form of a door seal is provided on the front wall of the tub, which is arranged undetachably on the tub container cap. In the known stainless steel suds containers, a high-quality material is used for the suds container in order to prevent the crevice corrosion in the area of the sealing ring clamping. This material is significantly more expensive than a tub made of standard chrome steel. The geometry of the clamping may cause crevice corrosion on the tub cap in the low grade material. For example, stainless steel lye containers use a non-caustic lye container cap that is considerably more expensive than a lye container cap made from standard materials. When using a standard material, crevice corrosion may occur in the area of the door sealing ring clamping. This corrosion is visible. To prevent this crevice corrosion, a higher quality and more expensive chrome or stainless steel is used.

The connection of the door sealing ring is usually carried out by an integrally formed geometry surface on the tub container cap on which abuts a corresponding geometry of the sealing ring. This system keeps the hammer geometry, which contributes decisively to the laundry, in the required position. During the washing process, it comes to movements of the elastic sealing ring, whereby water passes between the sealing ring and the contact surface, which can not flow through the very small gap or dry. This can lead to biofilms, bacteria, contamination etc. and crevice corrosion.

The invention thus presents the problem of providing a system in which the tub comprises a tub container cap, which can be made of a cheaper and thus possibly less high-quality material, crevice corrosion and microbial contamination should be prevented in the connection area to the door seal.

According to the invention, this problem is solved by the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The achievable with the invention advantages are that it is ensured by the special construction of the sealing ring in the connection area on the one hand, that the hammer geometry, which remains in the flat system in the necessary position for the laundry, while ensuring that the water is not in the gap remains, but flows to the lowest point of the sealing ring and dries there. This reduces microbial contamination in the gap area and prevents crevice corrosion. Due to the special design of the sealing ring in the clamping area of the tub cap sufficient gap between the sheet and the sealing ring is present to prevent moisture and thus the crevice corrosion. In addition, a tight fit and optimum function of the sealing ring is ensured by the molded ring geometry.

According to the invention it is therefore proposed that a gap space is provided in the connection region of the edge approach and grooved ring, which ensures a radially applied air or water circulation as flushing medium to prevent bacterial contamination in the field of application of the materials. In this case, the gap is formed essentially by the shape of the groove on the groove-ring.

According to an advantageous embodiment of the invention, the gap has at least one drain for the flushing medium. In this case, the drain is preferably arranged in the lower region of the Nutrings. In a further development, the groove overlaps with its front facing the dry side front leg, the edge profile lying flush fitting, the groove with her rear to the wet area aligned legs at a distance to form the gap space abuts the edge profile.

According to an advantageous embodiment of the invention support cams are formed on the rear leg, which form a radially arranged cam ring on the inner wall of the rear leg. In this case, at least six cams may be present over the annular region, which in particular form the gap. In a further development of the invention, at least one opening is preferably formed in the lower region of the rear leg to provide an inlet or outlet for the flushing medium.

The invention also relates to a door seal in its design for a tub cap.

Figur 1

eine perspektivische Darstellung von Laugenbehälterkappe und Türdichtring in explosionsartiger Darstellung;

Figur 2

eine geschnittene Darstellung des Randansatzes der Laugenbehälterkappe mit angesetztem Türdichtring in einer ersten Schnittebene zwischen den Abstütznocken;

Figur 3

eine weitere Darstellung gemäß der Figur 2 in einer zweiten Schnittebene im Bereich eines Abstütznockens;

Figur 4

eine perspektivische Darstellung des Türdichtringes in der geschnittenen Ansicht in Blickrichtung auf den hinteren Schenkel der Nut mit Nockenkranz; und

Figur 5

eine weitere perspektivische Darstellung des Türdichtringes in der geschnittenen Ansicht in Blickrichtung auf den hinteren Schenkel der Nut mit Nockenkranz und Ablauflöchern im unteren Bereich.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows:

FIG. 1

a perspective view of Laugenbehälterkappe and door seal in an exploded view;

FIG. 2

a sectional view of the edge attachment of the tub container cap with attached door seal in a first sectional plane between the support cams;

FIG. 3

another illustration according to the FIG. 2 in a second cutting plane in the region of a support cam;

FIG. 4

a perspective view of the door sealing ring in the sectional view in the direction of the rear leg of the groove with cam ring; and

FIG. 5

a further perspective view of the door sealing ring in the sectional view in the direction of the rear leg of the groove with cam ring and drain holes in the lower area.

The FIG. 1 shows a system 1 consisting of a non-illustrated tub and a door seal 2, wherein the tub a tub container cap 3, as shown, comprises, which is attached as a made of metal washer 4 on the front-side shell region of the tub. The lye container cap 3 has for connection to an edge extension 5, over which a molded on the door seal ring 2 U-ring 6 is slipped, as this in the Figures 2 . 3 . 4 and 5 is shown in more detail.

As from the synopsis of FIGS. 2 to 5 can be seen in different sectional views, a gap 7 is provided in the connection region of the edge approach 5 and groove ring 6, which is a radially applied air or water circulation as Rinsing medium to prevent microbial contamination in the application of materials guaranteed. To clarify how the air or water circulation takes place as flushing medium in the gap 7, results from the arrows, which illustrate a flush. As can be seen from all figures, the gap 7 is formed essentially by the shape of the groove 8 on the grooved ring 6. From the FIG. 5 It can be seen that the gap space 7 has at least one outlet 9 for the flushing medium in the lower region.

From the FIG. 2 and 3 It can be seen how the groove 8 with its front leg 10, the edge projection 5 overlaps surface-fitting, wherein the front leg 10 toward the dry side, so the front housing of the machine housing is aligned. With its rear leg 11, the groove 8 is located at a distance to form the gap 7 at a point on the edge profile of the marginal projection 5. The so-called punctiform system results from the synopsis of Figures 2 and 3 , where in the FIG. 2 above a free space is recognizable, because in this area no punctual investment is given, and accordingly in the FIG. 3 a sectional plane is shown where the punctual investment is given. The punctiform contact with the edge profile of the edge approach 5 results from the integrally formed on the rear leg 11 supporting cam 12, on the inner wall 13 of the rear leg 11 a radially arranged cam ring, as shown in the FIG. 5 recognizable form.

In this case, for example over the annular region of the inner wall 13, six support cams 12 may be present, which form a sufficient open gap space 7 in the groove 8 on the grooved ring 6. As already mentioned, 11 openings 14 are formed in the lower region of the rear leg to provide the inlet or the outlet for the flushing medium. It is particularly advantageous that in the region of the openings 14 of the cam ring to form a free space 15, as in the FIG. 5 is shown, is interrupted for the drying or for the water flow.

Claims (8)

System (1), consisting of a tub and a door sealing ring (2), wherein the tub comprises a tub container cap (3), which is attached from an annular disc (4) made of metal on the front-side jacket edge of the tub, and wherein the tub container cap (3 ) has an edge projection (5) for connection via which a groove ring (6) formed on the door sealing ring (2) can be turned,
characterized,
that in the connection region of the rim attachment (5) and nut ring (6) a gap (7) is provided which has a radially-scale air - guaranteed or water circulation as the purging medium for prohibiting contamination or crevice corrosion in the connection region of the materials. System according to claim 1,
characterized,
that the gap (7) is formed essentially by the shape of the groove (8) on the grooved ring (6). System according to claim 2,
characterized,
that the gap (7) has at least one inlet and an outlet for the flushing medium. System according to claim 3,
characterized,
that the inlet or the discharge in the region of the groove (8) of the U-cup (6) is arranged. System according to claim 2,
characterized,
that the groove (8) with its front leg (10) engages behind the edge projection (5) of the edge profile in a surface-fitting manner. System according to claim 2,
characterized,
that the groove (8) with its rear leg (11) at a distance to form the gap space (7) punctiformly on the edge shoulder (5). System according to claims 1 to 6,
characterized,
in that support cams (12) are formed on the rear leg (11) and form a radially arranged cam ring on the inner wall (13) of the rear leg (11). System according to claim 4,
characterized,
that in the region of the openings of the cam ring to form a free space (15) for the drying or for the water flow is interrupted.

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