Refrigerant loss detector and alarm
US5228304A · kind A · utility
66Cited by
12References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H29/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A refrigerant loss detector and alarm, the detector device suitable for installation in the piping of a refrigeration system which utilizes a liquid/vapor phase change substance as the refrigerant. Upon detection of refrigerant vapor accumulating in the loss detector, thereby displacing refrigerant liquid therefrom, the orientation of a float element containing a mercury switch is affected. Upon a fall in refrigerant liquid level in the loss detector, the mercury switch becomes activated, thereby completing an external electrical circuit which contains a time delay device and an alarm device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.