A method of controlling a transport refrigeration system including a refrigeration unit including a compressor, and a refrigerated compartment operably coupled to the refrigeration unit, and the transport refrigeration system is operable in a standby mode in which the transport refrigeration system is connected to and powered by a mains power source, the method including providing a first compressor speed, wherein the first compressor speed is less than a maximum speed of the compressor of the refrigeration unit; determining when the transport refrigeration system is being operated in the standby mode; determining whether a current time is within a first time period; and when it is determined that the transport refrigeration system is being operated in the standby mode, and when it is determined that the current time is within the first time period: operating the compressor of the refrigeration unit in accordance with the first compressor speed.

A transport refrigeration system includes a refrigeration unit including a controller configured to control the refrigeration unit: an electric power device configured to provide power to a refrigeration component of the refrigeration unit: an export power module (EPM) including: an EPM controller in communication with the controller: a power control device configured to receive power from the electric power device: an auxiliary device coupled to the power control device: wherein the controller is configured to communicate with the EPM controller to control power supplied from the electric power device to the auxiliary device.

A method of operating a transport refrigeration system is provided. The method includes electrically powering a first plurality of components of a first refrigeration unit and a second plurality of components of a second refrigeration unit, wherein electrically powering comprises operating a prime mover and an electric generation device. The method also includes monitoring a plurality of operating parameters of the first refrigeration unit. The method further includes monitoring a plurality of operating parameters of the second refrigeration unit. The method yet further includes calculating a combined power load of the first refrigeration unit and the second refrigeration unit. The method also includes comparing the combined power load to a maximum available power of the prime mover.

A torque estimating device of a gas compressor includes a reference torque characteristic storage unit that stores a reference torque characteristic of the gas compressor as a torque characteristic of the gas compressor in a specific operation state, a torque setting unit that sets a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit, and a torque correcting unit that sets a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation and an elapsed time from startup.

A rotational speed control apparatus for an engine that drives an air conditioning compressor includes an electronic control unit. The electronic control unit corrects a calculated value of a load torque of a compressor in accordance with a deviation between a rotational speed of the engine and a target rotational speed, as a changeover transition period control, in a changeover transition period. The electronic control unit also sets an execution period of the changeover transition period control such that the execution period in a changeover transition period from the stopped state to the driven state of the compressor is longer than an execution period of the changeover transition period control in a changeover transition period from the driven state to the stopped state of the compressor.

Disclosed are climate systems and methods for control the climate systems. A climate system includes a plurality of compressors arranged in parallel, a condenser disposed downstream of the compressors and an evaporator disposed downstream of the condenser. The compressors, the condenser, and the evaporator are fluidly connected by refrigerant lines to form a refrigerant circuit. The climate system also includes a controller that controls the operation of the compressors to draw back lubricant to the compressors without use of an oil equalization system.

An air conditioning system for use with a vehicle is configured to provide conditioned air. The air conditioning system includes a controller configured to vary a flow of the conditioned air and the controller is arranged to be cooled by the conditioned air.

Methods and systems for a MTRS with an ejector system are provided. The system can include a refrigeration circuit that has a compressor, a first heat exchanger downstream of the compressor, first and second heat exchange units downstream of the first heat exchanger, and an ejector system downstream of the first and second heat exchange units and upstream of the compressor. The first heat exchange unit provides independent climate control to a first zone of the transport unit. The second heat exchange unit provides independent climate control to a second zone of the transport unit. The ejector system mixes refrigerant exiting the first heat exchange unit with refrigerant exiting the second heat exchange unit, increases the pressure of the mixed refrigerant, and directs the mixed refrigerant to the compressor.

The refrigeration device has an inverter device, an electric compressor, a condenser, an evaporator, a condenser fan, an evaporator fan, and a controller. An AC output from a power generator is supplied to the inverter device. A refrigerant discharge amount of the electric compressor is controlled by the inverter device. The refrigerant from the electric compressor flows in the condenser, and the condenser causes the refrigerant to radiate heat to outside air outside a container. The refrigerant from the condenser flows in the evaporator, and the evaporator cools an interior of the container. The condenser fan is driven by a DC output from a DC power supply device and blows air to the condenser. The evaporator fan is driven by the DC output from the DC power supply device and blows air to the evaporator. The controller controls at least the electric compressor, the inverter device, and the engine.

A transport refrigeration system includes a refrigeration unit including a controller configured to control the refrigeration unit; an electric power device configured to provide power to a refrigeration component of the refrigeration unit; an export power module (EPM) including: an EPM controller in communication with the controller; a power control device configured to receive power from the electric power device; an auxiliary device coupled to the power control device; wherein the controller is configured to communicate with the EPM controller to control power supplied from the electric power device to the auxiliary device.