Apparatus and method for controlling a greenhouse environment
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United States of America Patent
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Oct 18, 2016
Grant Date -
Jul 17, 2014
app pub date -
Jul 18, 2011
filing date -
Jul 18, 2011
priority date (Note) -
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Abstract
Apparatus for controlling an environment in a greenhouse, the apparatus comprising: first and second heat exchangers, each comprising a radiator and a fan system for driving air through the radiator; a first refrigerant circulation system that circulates a refrigerant fluid between and through the 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 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 its respective radiator to deposit heat in the refrigerant and the second fan system drives air from outside to inside the greenhouse and through its respective radiator to acquire the heat deposited in the refrigerant.
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