Air flow balance in food display applications

An open-fronted food display cabinet, comprising:

• a rear wall;
• two side walls;
• a shelf for holding food;
• an air duct having an air duct port, wherein the duct port has a center portion and side portions;
• a compartment, wherein the compartment is defined by the shelf, the air duct, a compartment rear wall, and the two side walls, wherein the shelf is on a bottom of the compartment and the air duct is on a top of the compartment;
• a fan;
• and
• an air conditioner,
• wherein the air duct port is in communication with the compartment, and the fan supplies conditioned air from the air conditioner through the air duct and out of the duct port into the compartment,
• wherein the duct port has a top, a bottom, and a gap between the top and the bottom, wherein the gap is shorter at the center portion than at the side portions, so that the volume of air exiting the duct port at the side portions is greater than the volume of air exiting the center portion.

An open-fronted food display cabinet, comprising:

• a rear wall;
• two side walls;
• a shelf for holding food;
• an air duct having an air duct port, wherein the duct port has a center portion, side portions, a top, a bottom, and a gap between the top and the bottom, wherein the gap is shorter at the center portion than at the side portions;
• a compartment, wherein the compartment is defined by the shelf, the air duct, a compartment rear wall, and the two side walls, wherein the shelf is on a bottom of the compartment and the air duct is on a top of the compartment;
• a fan;
• an air conditioner, wherein the air duct port is in communication with the compartment, and the fan supplies conditioned air from the air conditioner through the air duct and out of the duct port into the compartment;
• and
• a diffuser connected to the duct port, wherein the diffuser directs the conditioned air from the duct port into the compartment, and the diffuser comprises profiled portions so that the diffuser bends away from the duct portion at the side portions,
• wherein the volume of air exiting the duct port at the center portion is less than the volume of air exiting the duct port at the side portions.

An open-fronted food display cabinet, comprising:

• two side walls;
• a shelf for holding food;
• a moveable door at the rear of the cabinet;
• an air duct having an air duct port, wherein the duct port has a center portion and side portions;
• a compartment, wherein the compartment is defined by the shelf, the air duct, the rotatable door, and the two side walls, wherein the shelf is on a bottom of the compartment and the air duct is on a top of the compartment;
• a fan;
• and
• an air conditioner,
• wherein the air duct port is in communication with the compartment, and the fan supplies conditioned air from the air conditioner through the air duct and out of the duct port into the compartment, and
• wherein the moveable door moves from a first position to a second position, wherein the first position allows a user to access the compartment from the rear, and the second position closes off the compartment from the rear..