DE2745644A1 - SPRAYER FOR A DISHWASHER - Google Patents

Description

EBHZ-77/68 10.10.1977

Ul / kt

Licentia

Patent-Verwaltungs-GmbH

Frankfurt / Main

Spray arm for a dishwasher

The invention relates to a spray arm for a dishwasher according to the preamble of claim 1.

A known spray arm of this type (DT-OS 1 628 547) consists of two composite shells or a blown part and has a cross-section tapering towards the ends. Several spray nozzles are provided over the length of the tubular spray arm.

The object of the invention is a spray arm of the type mentioned at the beginning Kind to train in such a way that it delivers spray jets with high kinetic energy even at low speeds.

The solution to this problem according to the invention is the characteristic of claim 1 can be found.

The invention improves the washing result and ensures that the water is evenly distributed on the items to be washed in the Dishwasher reached. The training of the spray arm with

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the smallest cross-section at the water inlet and the spray arm cross-section which increases towards the ends of the arms causes the spray arm to rotate an increase in the spray jet intensity by utilizing the amount of water in the spray arm Centrifugal forces. To ensure even water distribution, the spray nozzles are designed so that they are close to the spray arm support have the largest and in the area of the spray arm ends the smallest outlet cross-section. The nozzle shapes be different. With the known spray arms with the water inlet With a large cross-section and a small cross-section at the spray arm ends, the pressure of the spray jets can only be increased by high speeds can be reached at the nozzles, which, however, results in a high level of stress on the spray arm bearing.

The invention is explained in more detail with reference to the drawing. It shows:

Fig. 1 shows a spray arm in longitudinal section and

2 shows a spray arm in plan view.

The spray arm made of plastic or metal is a hollow body 1 is designed in one or more parts and has spray nozzles 2 on the top and / or bottom. There is a bearing axis at the pivot point 3 and a water supply 4 is located in the area of the pivot point.

Figure 2 shows as an embodiment a spray arm, the Cross-section increases from the bearing point 3 to the spray arm ends 5, 6 and e.g. in the form of an elongated figure-eight loop

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is trained. Since the force acting on the iließenden by Jen spray arm water flow during rotation of the Sprüheirmes centrifugal force from the bearing point 3 z \> increases toward the Sprüharmenden are the cans 2 uniform for achieving sprays designed so that their outlet openings with increasing distance from the bearing point smaller cross-sections
exhibit. The shape of the spray nozzles can be different.

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Claims (2)

27 / .56AA EBHZ-77/68 10.10.1977 Ul / kt EXPECTATIONS r 1. Rotatable spray arm for a dishwasher, consisting of a hollow body closed at the ends, which is provided with several spray nozzles and in the area of the pivot point has a bearing point with a water supply, characterized in that the cross section of the hollow body (D increases from the bearing point (3) to the spray arm ends (5, 6) and that the outlet openings of the spray nozzles (2) with increasing Have smaller cross-sections at a distance from the bearing point, 2. Spray arm according to claim 1, characterized in that the hollow body (1) has the shape of an elongated figure eight loop or the like. 909815/0547