Domestic appliance having electrically isolated input control circuitry
US5144543A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/902
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a domestic appliance such as a washer, dishwasher, dryer, beverage preparation device or the like having several control circuits driven by varying voltage supplies, the input control circuit is supplied with a relatively low voltage and is electrically isolated from higher voltages within the circuitry of the appliance. An optical isolator is provided in the communication channel between the input control circuit and a power control circuit which is connected to circuit elements connected to the A.C. line voltage. The low voltage supply driving the input control circuit is also isolated from the A.C. line voltage. All operator accessible components are coupled to the input control circuit and are therefore isolated from the A.C. line voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.