Refrigerated merchandiser with foul-resistant condenser
View Patent ↗A refrigerated cold beverage merchandiser ( 10 ) includes an enclosure defining an insulated, refrigerated display cabinet ( 25 ) and a compartment ( 30 ) heat insulated therefrom wherein a compressor ( 40 ) a condenser ( 50 ) and a condenser fan ( 60 ) are disposed. The condenser ( 50 ) is formed by a plurality of in-line tube banks ( 52 ). Each tube bank ( 52 ) is a serpentine tube formed a plurality of unfinned, straight tube segments ( 54 ) extending in parallel rows ( 55 ) between a pair of spaced, opposed end plates ( 58 ) and elbow turns ( 56 ) connecting neighboring straight tube segments ( 56 ) in a conventional manner. Each successive tube bank ( 52 ) is arranged with the other tube banks so that respective parallel tube rows ( 55 ) are disposed in-line from the front to the rear of the condenser ( 50 ) or with each successive tube bank being offset in a slightly staggered arrangement.
1. A refrigerated merchandiser comprising:
an enclosure defining a refrigerated display cabinet;
an evaporator disposed in operative association with the refrigerated display cabinet;
a compartment heat insulated from the refrigerated display cabinet
a condenser disposed within said compartment;
a condenser fan disposed within said compartment in operative association with said condenser; and
a compressor disposed within said compartment and connected in refrigerant flow communication with said evaporator and said condenser for circulating refrigerant through said evaporator and said condenser;
said condenser having at least one first tube bank and at least one second tube bank, each tube bank being an unfinned serpentine tube having a plurality of a parallel, straight tube rows extending between a pair of spaced end plates, the tube rows within each tube bank being spaced apart at a transverse spacing S t , the first and second tube banks being disposed such that respective tube rows are offset in a staggered arrangement with an offset S S of not greater than 0.25 S t .
2. A refrigerated merchandiser as recited in claim 1 wherein the first and second tube banks being disposed such that respective tube rows are offset in a staggered arrangement with an offset S s in the range of 0.06 to 0.25 S t .
3. A refrigerated merchandiser as recited in claim 1 wherein the tube banks are spaced apart in the longitudinal direction at a spacing of at least 0.7 the transverse spacing S t between tube rows within the tube banks.