Hänvisningar finns i följande patent|
| US4165619 | 29 nov 1977 | 28 aug 1979 | Messler, Societe Anonyme | Method of controlling a heat pump, and a heat pump device adapted to operate in accordance with said method | | US4270362 | 19 mar 1979 | 2 jun 1981 | Liebert Corporation | Control system for an air conditioning system having supplementary, ambient derived cooling | | US4313310 | 3 sep 1980 | 2 feb 1982 | Fujitsu Limited
Fuji Kaden Co., Ltd. | Cooling system | | US4367634 | 19 jan 1981 | 11 jan 1983 | | Modulating heat pump system |
|
