Cooling device and controlling method thereof for reefer container
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United States of America Patent
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N/A
Issued Date -
Nov 15, 2007
app pub date -
May 3, 2007
filing date -
May 15, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A cooling device and a controlling method thereof for a reefer container are disclosed. The cooling device has a controlling circuit comprising a controller; a compressor relay, a condenser fan relay and an evaporator fan relay connected in parallel; a pressure switch connected to the compressor relay in series; and a pressure sensing and controlling device for controlling the pressure switch to turn on or off. The pressure sensing and controlling device controls the pressure switch to turn off when air pressure inside container drops to a preset pressure, and controls the pressure switch to turn on when air pressure inside container rises higher than the preset pressure. The controlling method comprises steps of detecting and controlling air pressure inside container. The invention can be implemented in a simple structure and at a low cost, as only a few of electric elements are added to conventional controlling circuits.
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