Refrigeration – Display type – With air controlling or directing means
Patent
1990-07-16
1991-09-17
Tapolcai, William E.
Refrigeration
Display type
With air controlling or directing means
62282, A47F 304
Patent
active
050483030
ABSTRACT:
An open front refrigerated display case having an improved ambient air defrost system which includes a housing with a display compartment area for displaying articles therein and an open front area to facilitate placement and removal of the articles, a main refrigeration duct extends throughout the housing having a primary inlet above the open front area and a primary outlet defined below the front area, a primary refrigeration coil is positioned within the primary refrigeration duct for cooling of air passing therethrough and a primary fan device is positioned within the primary refrigeration duct to facilitate drawing of air through the air inlet and expelling of refrigerated air through the air outlet in such a manner as to form an air curtain across the open front area. An ambient air defrost system is included having an ambient air circulation device such as a fan and an ambient air drive means for powering thereof. A one-way ambient air flow restriction device is included preferably having a header member and an air damper means pivotally movable with respect thereto between a refrigeration mode position and a defrosting mode position. The one-way ambient air restriction device allowing full air flow when in the refrigeration mode while allowing restricted air flow while in the defrosting mode,. Preferably the air damper device includes a plurality of air flow apertures defined therein to facilitate restricted flow therethrough in the reverse direction during ambient air defrost.
REFERENCES:
patent: 2594066 (1952-04-01), Pabst
patent: 3226945 (1966-01-01), Spencer
patent: 4182130 (1980-01-01), Ljung
patent: 4242882 (1981-01-01), Abraham
patent: 4449374 (1984-05-01), Ibrahim
Campbell Bradley J.
Rosanio Ronald R.
Hill Refrigeration Division of the Jepson Corporation
Tapolcai William E.
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