Combination hot gas and air defrost refrigerated display case
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United States of America Patent
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May 22, 1984
Issued Date -
N/A
app pub date -
Jul 13, 1982
filing date -
Jan 19, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A refrigerated display case having a defrost means which combines the supply of hot refrigerant gas to the refrigeration coils with the supply of ambient air in order to provide defrost action during a defrost cycle. The ambient air band is taken into and propelled out of the air conduit in a manner to prevent ambient air from being forced into the product display space in order to avoid thawing of the stored refrigerated products. The defrost air is ejected away from the access opening in order to allow a cold air layer to remain on top of stored products in an open top case. In front cases, a defrost air band is established across the access opening to form a protective air curtain in order to exclude the contacting of the stored products with high temperature and moist ambient air. The ambient air band is unidirectional during the entire defrost cycle. Ejector means are provided for expelling the defrost air band outwardly away from the display space of the case when ejected out of the open top and open front refrigerated cases.
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