Method and an installation for the air-conditioning of greenhouses and frames
US4215672A · kind A · utility
6Cited by
1References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 14, 1977 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Dec 14, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P60/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Solar radiations having longer wavelengths than those which are useful for plant development are selectively absorbed by an optical filter formed by two transparent walls which constitute at least part of the roofing structure of a greenhouse or "lean-to" frame and by a heat-transporting fluid which is circulated between the walls in a closed-circuit system. The heat absorbed is removed and stored in a separate reservoir, then recovered at night by pumping and circulating the fluid so as to maintain a predetermined minimum temperature within the greenhouse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.