Refrigeration device uses phase change material for cooling air
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United States of America Patent
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Apr 28, 2020
Grant Date -
Feb 28, 2019
app pub date -
Aug 29, 2017
filing date -
Aug 29, 2017
priority date (Note) -
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Abstract
A refrigeration device has a condenser coil that has periodic access to outside air. A time-activated thermostat controls the operation of an evaporator coil that is in thermal contact with a reservoir containing phase change material. A thermally conductive pipe containing antifreeze fluid is connected to a pump that circulates the antifreeze fluid inside the pipe. A first portion of the pipe is inside the reservoir in thermal contact with the phase change material and a second portion of the pipe is near an air fan or connected to a fan coil unit to exchange heat through the pipe between the reservoir and the air blown by the fan or the fan coil unit. The evaporator coil produces a phase change in the phase-changing material in the reservoir at night when outdoor temperature is colder than during day and the phase-change material is used during day to cool air blown by the air fan or the fan coil unit. The air fan and a portion of the pipe can be outside of the refrigeration device and be detached.
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