High speed freezing system for a refrigerator
US4389854A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Sep 29, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2400/30
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A high speed freezing apparatus in use for a refrigerator. In the freezing apparatus, evaporators for the cold and freezing chambers are coupled in a series relation with respect to a compressor. An electromagnetic valve is provided in parallel with the evaporator for the cold chamber. When a high speed freezing start signal is produced from an operating section mounted on a front panel of a door for the freezing chamber, a timer circuit provided in a control section is operated. An operating condition of the compressor is detected by a detecting transformer and a given signal is produced from a start-failure preventing circuit. The start signal is transferred through a gate circuit to a relay portion only during the time that the given signal is transmitted to a gate circuit. Through the relay portion, the compressor and the electromagnetic valve are driven, so that the refrigerant is supplied to only the evaporator for the freezing chamber to start the high speed freezing operation. The time period of the high speed freezing operation is controlled by a timer circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.