DE1435026A1 - Device for reversing the direction of rotation of the drive motor of a laundry mover - Google Patents

Description

SEI ₁ LSCH Berlin and Munich

Ι ^

JLXpI

PVA 30/60

ff) BERUN-S5EMENGCTADT

ADMINISTRATIVE CCBmUCB

Device for reversing the direction of rotation of the drive motor a laundry mover

Addition to the patent. ... ... (note S 65 04? VTl / 8d)

The main patent relates to a device for reversing the direction of rotation the drive motor of a laundry mover (e.g. the drum of a washing machine) with an electrical switch, of its drive, preferably the laundry mover itself, is controlled so that the Sehaltzeit the contacts of a Delay device influenced v / can ground. This delay device can, for example, consist of a bimetal strip exist, which lies in the switching path of the changeover switch contact. This way you can use a

809806/0276 V " _M

' - 1 - BAD ORIGINAL He / Hoß

198

received fine, in which the movements of the Wäsehe mover in a slower rhythm than in the normal wash cycle. A such! "input is preferably used during the heating-up time of the Washing time used to ensure that all items of laundry remain evenly distributed in the lye, without during this Too much influence on the laundry takes place.

In the case of a reverser with a fine inlet of the type mentioned at the outset, in which the fine inlet times are given by the cooling of a bimetal strip, these fine inlet times vary greatly from the ambient temperature. The invention aims to compensate for this change or even to create a reverse dependency. According to the invention, for this purpose the influence of the outside temperature on the bimetal strip operating as a delay device is compensated for by a second bimetal strip which acts to accelerate the actuation of the switch when the outside temperature rises. It can be reached with this additional device that the "fine set times-well, at - '' ■■ outside temperature rises remain smooth and even '■''the · opportunity to"^1''' with increasing ^{Laugentempeiratur:} to achieve a gradual reduction of the fine set times The last-mentioned effect is particularly favorable in terms of washing technology, because the detergent only comes into its full effect at higher temperatures. Long work in fine-tuning is therefore no longer necessary. These conditions can be met in a simple manner with the device according to the invention .

80980 * 6 / 0276- 2 -. ^B ^ ^D original

PVA / e / H 198

There are various possibilities for the embodiment of the invention. The second bimetal strip will be arranged in such a way that that it reverses the mechanical delay of the switch actuation caused by the first bimetal strip is made. This can be done, for example, so that the delay causing the first bimetal strip at the end of the second Bimetallic strip is attached so-that it is moved by this in the sense of the desired compensation. With such a Arrangement must be ensured that the compensation bimetal strip from the first heated bimetal strip is heated up with. It must therefore be insulated from this, preferably by interposing a heat insulating layer.

This embodiment of the invention is shown schematically in the figure an embodiment shown. With 1 is the reversing switch of the washing motor. Depending on whether the switch 1 is in position a or in position b, has the motor connected to the network K, Ph has a very specific direction of rotation. The motor current flows through the heater 2 of the bimetal strip 3, and this is bent downwards by the amount of heat supplied. The one with the bimetal strip 3 During this process, the connected pin 4 lies in the path of the lever connected to the switching lever of the reversing switch 1 ' and holds this in a division c. By remaining in this intermediate position, the bimetal heating 2 currentless. As a result, see .de; c, bimetallic strips cool down and releases the switching path for the lever, 5, like this. that then switch 1 jumps to position a or b.

80 98 0 6/0 2 76 = '

3? ΝΑ / Ε / ΗΊ98

The bimetal strip cools down when the outside temperature rises slower, d. H. the reception times become longer,. because the pin holds the lever 5 longer. To this undesirable To compensate for the influence of the outside temperature, the bimetallic strip 3 is attached to a second one via a heat-insulating layer 7 Bimetal strip 6 attached, which is when the ambient temperature increases curved upwards. As a result, when the bimetal strip 3 is heated, the pin 4 can no longer be as deep immerse in the direction of the lever 5, d. This means, although there are longer cooling times, when the outside temperature rises, the The distance to be covered is shorter and the precision times remain uniformly or, given a particularly favorable design of the bimetallic strip 6, are higher in the sense of overcompensation heat-insulating layer 7 can be bonded to the ends of the bimetal strips 3 and 6.

The compensation bimetallic strip 6 can differ from the one shown Embodiment also sit at a suitable other point of the switching device. So could z. B. the stop 5 sit on such a bimetallic strip which is used for compensation and which descends when the temperature rises bent through.

1 figure

4 claims

809806/0 27-6

Claims (2)

Patent claims! 1.' Device for reversing the direction of rotation of the drive motor of a laundry mover (e.g. the drum of a washing machine) with an electrical switch that is controlled by its drive, preferably the laundry mover itself, so that the switching time of the contacts is influenced by a delay device formed by a bimetal strip can according to patent (note S 65 047 VIl / 8d), characterized in that the influence of the outside temperature on the bimetal strip working as a delay device is compensated for by a second bimetal strip which acts to accelerate the actuation of the switch when the outside temperature rises. 2. Apparatus according to claim 1, characterized in that the second bimetal strip serves to pass through the first bimetal strip caused mechanical delay in switch actuation to undo. 3 · Device according to claim 1 and 2, characterized in that that the delay causing the first bimetal strip at the end of the second bimetal strip with the interposition of a Heat insulating layer is attached, ao that it is moved by this in the sense of the desired compensation. - 5 - 809806/0276 bathroom ORIGINAL 198 4 * device according to claim 1 and 2, characterized in that that the second bimetallic strip is connected to one with the changeover switch Stop acts so that it is moved in the sense of the desired compensation.