Refrigeration equipment, particularly household refrigeration or the like
US4129993A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Mar 29, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2700/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Refrigeration equipment, particularly a household refrigerator or the like, having a heat-insulated refrigeration chamber and a refrigeration unit which can be switched-on intermittently by a temperature-dependent control and the heat exchanger of which, arranged in the refrigeration chamber, can be defrosted between the cooling periods through the supply of thermal energy and/or natural incidence of heat from the environment of the refrigeration equipment, the control being equipped with two sensors, one of which measures the air temperature in the refrigeration chamber and the other, the temperature at the heat exchanger. The sensors have their switching functions coupled by a mutually interlocking electronic circuit in which the switching function activated by the temperature at one sensor must run down completely before the switching function activated at the other sensor is set in motion. Proper defrosting of the heat exchanger is ensured and the temperature in the refrigeration chamber is kept constant independent to a large extent of the ambient temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.