Apparatus for heating and cooling

摘要

Apparatus for heating and cooling fluids in a habitation, particularly for heating and cooling air and heating water in a caravan or other mobile habitation. The apparatus includes a refrigeration unit 3 to cool a refrigerant and to circulate the cooled refrigerant through a circulation means (21,22) and an interior heat exchanger 2, to absorb heat from air in the habitation. The apparatus also includes a gas fired boiler 1, for heating water and a sub circuit (23,24) of the circulation means arranged so that refrigerant may be circulated through a further heat exchanger 15 to absorb heat from the water in the boiler 1 for subsequent emission through the interior heat exchanger 2 to heat air in the habitation. The sub circuit (23,24) is valve controlled so that when refrigerant is circulated between the further (15) and interior (2) heat exchangers this flow is substantially isolated from the refrigeration unit (3). <IMAGE>