Patent ID: 8104306

Claim:
A refrigeration system having an evaporator, compressor, condenser, and metering valve, operating in conjunction with an evaporative cooler having a housing containing an evaporative pad, a centrifugal blower assembly comprising a motor, a centrifugal squirrel cage fan and a blower shell, and a tank configured to provide the evaporative pads with an evaporative liquid, wherein the evaporator further comprises: a three way solenoid valve which receives a refrigerant from the condenser and outputs the refrigerant to the evaporator through a first outlet and a second outlet, wherein the three way solenoid valve alternates refrigerant between the first outlet and the second outlet based upon a first cycle and a second cycle; a first evaporator tube having a first end and a second end, the first end is directly connected to the first outlet, wherein the first evaporator tube transports refrigerant to a suction fitting connected in line with the compressor during the first cycle, wherein the second end is connected to the suction fitting; a second evaporator tube having a first end and a second end, the first end is directly connected to the second outlet, wherein the second evaporator tube transports refrigerant to the suction fitting connected in line with the compressor during the second cycle, wherein the second end is connected to the suction fitting; and a fin in contact with the first evaporator tube and the second evaporator tube, wherein the first evaporator tube and the second evaporator tube are in parallel contact with the fin along most of the fin's length, wherein the fin is sandwiched between the first evaporator tube and the second evaporator tube, wherein the first evaporator tube and the second evaporator tube are biased toward an edge of the fin farthest from the centrifugal squirrel cage fan.