Robert R Vogel

US Patent:

39370330, Feb 10, 1976

Filed:

Feb 7, 1975

Appl. No.:

5/547817

Inventors:

Sterling Beckwith - Menlo Park CA
Robert E. Vogel - Marshall MI
William Goyman - Marshall MI

Assignee:

Kysor Industrial Corporation - Cadillac MI

International Classification:

F25D 2106

US Classification:

62155

Abstract:

A multiple curtain, refrigerated display case employing an energy saving air defrost system that, during the first defrost stage, draws defrosting ambient air into the refrigerated air curtain passage from both directions, and during the second defrost stage employs part of the defrost air to form a circulating air curtain over the open front of the case. The case has defrost exhaust fans in the upper rear thereof actuated by a timer simultaneously with deactuation of the guard curtain fans and the refrigeration condensing unit. The circulation fans for the refrigerated air of the case have a total propulsive capacity significantly greater than that of the exhaust fans, such refrigerated air circulation fans being upstream of the refrigeration coils in the refrigerated air curtain passage, and the exhaust fans being downstream of such coils.