Patent ID: 9468158
Filing Date: 2016-10-18
CPC Classification: A01G,F24F,Y02A,Y02B,Y02P

Claim Text:
1. Apparatus for controlling an environment in a greenhouse, the apparatus comprising: a first heat exchanger, comprising a first radiator and a first fan system for driving air through the first radiator and a second heat exchanger comprising a second radiator and a second fan system for driving air through the second radiator; a first refrigerant circulation system that circulates a refrigerant fluid between and through the first and second radiators; a heater controllable to heat the refrigerant; a controller that controls the apparatus to operate selectively in a maintenance mode or a flush mode, wherein in the maintenance mode the heater heats the refrigerant and the first and second fan systems drive air from outside to inside the greenhouse and through the first and second radiators to acquire heat from the refrigerant, and in the flush mode the first fan system vents air from inside to outside the greenhouse through the first radiator to deposit heat in the refrigerant and the second fan system drives air from outside to inside the greenhouse and through the second radiator to acquire the heat deposited in the refrigerant.