Patent ID: 7043927

Claim:
A refrigeration unit for regulating the temperature of an enclosed volume, the refrigeration unit comprising: a refrigeration module, said refrigeration module including: a compressor having a discharge port and a suction port; a condenser heat exchanger unit operatively coupled to said discharge port; an evaporator heat exchanger unit operatively coupled to said suction port; a condenser fan disposed proximate to said condenser heat exchanger unit; an evaporator fan disposed proximate to said evaporator heat exchanger unit; and a suction modulation valve coupled to said suction port; a bypass module coupled to said refrigeration module, said bypass module including: a bypass mode switch, said bypass mode switch having a normal operation position and bypass operation position; and an operational mode switch, said operational mode switch having a full cool position and fan only position; and an electronic controller coupled to said bypass module; wherein when said bypass mode switch is in the normal operation position said electronic controller regulates the operation of said compressor, said condenser fan, said evaporator fan and said suction modulation valve; wherein when said bypass mode switch is in the bypass operation position, said compressor, said condenser fan, said evaporator fan and said suction modulation valve are selectively operated by said bypass module, wherein such selective operation is controlled by the position of said operational mode switch.