Claims
- 1. In an automatically controlled washing machine including:
- a laundry drum;
- a drive motor for driving the laundry drum with a plurality of different speeds for washing, rinsing and spinning;
- an rpm control circuit for adjusting an rpm of the drive motor; and
- means for determining the rpm of the drive motor in accordance with set-point and actual rpm values; the improvement comprising:
- a control circuit receiving a signal during a spin cycle, the signal being a measure for an undesired braking of the drum and being determined by a mutual ratio of the following operating parameters of the drive motor:
- a) the set-point rpm,
- b) the actual rpm, and
- c) a load-dependent electrical variable;
- and said control circuit controlling a spinning operation of the washing machine in dependence on the signal.
- 2. The washing machine according to claim 1, wherein the rpm control circuit is a phase angle control circuit, and the load-dependent electrical variable is a phase angle of a supply voltage of the drive motor.
- 3. The washing machine according to claim 1, wherein the rpm control circuit is a chopper control circuit, and the load-dependent electrical variable is a current takeup of the drive motor.
- 4. The washing machine according to claim 1, including means for turning off a spin drive of the drum at least for a limited length of time, upon application of the signal with a variable being an indication of a presence of a quantity of suds slowing down the drum.
- 5. The washing machine according to claim 4, including a water and detergent pump, and means for continuing to drive said water and detergent pump during the period when the spin drive is turned off.
- 6. The washing machine according to claim 4, including means for driving the drum in reverse in a gentle cycle during the time that the spin drive is turned off.
- 7. The washing machine according to claim 1, including means for initiating at least one further rinse cycle after a quantity of suds that slows down the drum is ascertained.
- 8. The washing machine according to claim 7, including means for conducting at least one of the rinse cycle and further rinse cycle with an elevated water level.
- 9. The washing machine according to claim 7, wherein said control circuit includes a configuration for storing a number of spin startup attempts in memory, and for using certain frequencies of the numbers for future treatment processes to either add a number of rinse cycles corresponding to a value gained by experience to the number of rinse cycles already initially installed by a manufacturer, or to install it before a next attempt to start up a spin cycle.
- 10. An automatically controlled washing machine, comprising:
- a laundry drum, and a drive motor driving the laundry drum with a plurality of different speeds for washing, rinsing and spinning;
- an rpm control circuit for adjusting a speed of the drive motor; said control circuit receiving signals representing an actual speed of the laundry drum, and said control circuit being programmed to control the speed of the drive motor during a spin cycle in dependence on a signal formed from the following parameters:
- a) a set-point speed,
- b) an actual speed, and
- c) a load-dependent variable;
- wherein the signal is a ratio of the parameters and the signal is a measure for an undesired braking of the drum.
Priority Claims (1)
Number |
Date |
Country |
Kind |
43 42 274.8 |
Dec 1993 |
DEX |
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CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 08/353,614, filed Dec. 12, 1994, and now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4410329 |
Blevins et al. |
Oct 1983 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
3828039 |
Feb 1990 |
DEX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
353614 |
Dec 1994 |
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