摘要:
A transport refrigeration unit for cooling the interior of a cargo box having multiple cargo compartments includes a refrigerant compressor, a main evaporator associated with a first compartment of the trailer and a remote evaporator associated with a second compartment of the cargo box. During loading of product into at least one compartment, a controller determines the degree of superheat (CSS) in the refrigerant, compares the degree of suction superheat (CSS) to a lower limit for the degree of superheat (LSS), and continues operation of the refrigerant unit in a refrigeration mode if the degree of suction superheat (CSS) is greater than the lower limit for the degree of superheat (LSS); or terminates operation of the refrigerant unit in the refrigeration mode if the degree of suction superheat (CSS) is not greater than the lower limit for the degree of superheat (LSS) and initiates a defrost of at least one of the evaporators.
摘要:
A power supply system for a transport refrigeration system includes an engine coupled to a compressor of a refrigeration unit for direct drive powering the compressor and a generator arranged to also be direct driven by the engine for generating electric power. The generator and the compressor are mounted to a common drive shaft driven by the engine, and the generator may be integrated with the compressor. The power supply system may further include an alternator arranged to be belt driven by the engine for generating DC electric power. A battery pack may be provided for storing and supplying additional DC power. During peak load demand on the refrigeration unit, the engine may be operated with the generator switched off to directly drive the compressor and direct current may be drawn from the battery pack to drive the condenser/gas cooler and evaporator fans.
摘要:
The refrigeration unit of an electrically powered trailer refrigeration system includes an economized scroll compressor and an economizer circuit selectively operable to inject refrigeration vapor into an intermediate stage of the scroll compressor. An engine driven generator produces AC current to power the scroll compressor and other electric components of the system. During operation of the refrigeration system at high capacity demand, a controller will operate the refrigeration system in an economized mode if sufficient electric power is available from the generator and in the non-economized mode if insufficient power is available to sustain operation of the refrigeration system in the economized mode.
摘要:
A transport refrigeration unit for cooling the interior of a cargo box having multiple cargo compartments includes a refrigerant compressor, a main evaporator associated with a first compartment of the trailer and a remote evaporator associated with a second compartment of the cargo box. During loading of product into at least one compartment, a controller determines the degree of superheat (CSS) in the refrigerant, compares the degree of suction superheat (CSS) to a lower limit for the degree of superheat (LSS), and continues operation of the refrigerant unit in a refrigeration mode if the degree of suction superheat (CSS) is greater than the lower limit for the degree of superheat (LSS); or terminates operation of the refrigerant unit in the refrigeration mode if the degree of suction superheat (CSS) is not greater than the lower limit for the degree of superheat (LSS) and initiates a defrost of at least one of the evaporators.
摘要:
A refrigeration system having a refrigeration unit (22) for providing temperature conditioned air to a temperature controlled space, an engine (26) and an electric generation device (24) driven by the engine, is provided with a battery system (28) for supplying electric power. A method of operating the transport refrigeration includes, during a high cooling demand mode, operating the engine (26) to drive the electric generation device (24) for supplying electric power and simultaneously employing the battery system (28) for supplying electric power to jointly power the plurality of power demand loads (50, 42, 46, 48) of the refrigerant unit.
摘要:
A power supply system for a transport refrigeration system includes an engine coupled to a compressor of a refrigeration unit for direct drive powering the compressor and a generator arranged to also be direct driven by the engine for generating electric power. The generator and the compressor are mounted to a common drive shaft driven by the engine, and the generator may be integrated with the compressor. The power supply system may further include an alternator arranged to be belt driven by the engine for generating DC electric power. A battery pack may be provided for storing and supplying additional DC power. During peak load demand on the refrigeration unit, the engine may be operated with the generator switched off to directly drive the compressor and direct current may be drawn from the battery pack to drive the condenser/gas cooler and evaporator fans.