A transport refrigeration unit controllably cools a container, and includes a compressor (58) constructed and arranged compress a refrigerant and a compressor motor (60) configured to drive the compressor (58). A battery (52) of the unit is configured to at least in-part provide electric power to the compressor motor (60). A power management system of the unit includes a computer-based controller configured to generate diagnostic data from data signals received from a battery temperature sensor (122), a battery current sensor (124), and a compressor motor current sensor (126).

Methods and systems are provided for adjusting a position of an air recirculation valve of a HVAC system to adjust a ratio of ambient to recirculated air routed to an AC evaporator to collect condensed water for water injection into an engine. In one example, a method may include adjusting the position of the air recirculation valve of the HVAC system based on a water level in a water storage tank of the water injection system. Further, the method may include adjusting the position of the air recirculation valve of the HVAC system based on a determined humidity of the ambient air and a determined humidity of the recirculated air.

A method for operating a device for the thermal conditioning of a motor vehicle interior, including: a refrigerant circuit including a compressor and a heat exchanger able to form an evaporator, the heat exchanger being able to exchange heat with a flow of air intended to be conditioned, a bypass means able to divert from the heat exchanger at least part of said air flow and which can be controlled in terms of position between the closed position in which no flow is diverted from the heat exchanger and a multitude of open positions in which part of the flow is diverted from the heat exchanger according to the position of opening, a mixing zone for mixing the flow that has passed through the evaporator and the flow of air diverted by the bypass means.

A vehicular air conditioning system is described including: an electrically powered compressor; the electrically powered compressor is controllable to operate at a range of speeds; and a condenser fan which is controllable to operate at a range of speeds.

A parking cooler which is capable of battery powered operation during engine off operation. The parking cooler or air conditioning system may vary in cooling capacities to maximize cooling or maximize battery life. The parking cooler includes one or more condensers and a housing to accommodate such variation of cooling capacity.

An exterior heat exchanger is provided with first to fourth paths. The flow rate of the air being blown by an exterior blower to pass through the first path closer to a refrigerant inlet of the exterior heat exchanger is set to be higher than that of the air being blown by the exterior blower to pass through the fourth path closer to a refrigerant outlet of the exterior heat exchanger.

A method for controlling an air condition arrangement of a vehicle. The air condition arrangement includes a heat pump system having a compressor, a condenser, and an evaporator. An air distribution unit is arranged in the vehicle for providing air to a vehicle compartment of the vehicle. The method includes directing a flow of air heated by the condenser by work from the compressor to the evaporator.

A method of minimizing C-Rate fluctuations with an electrically powered accessory (EPA) is disclosed. The EPA is configured to be used with at least one of a vehicle, a trailer, and a transport container that has a first controller. The EPA has a second controller. The method includes determining, by the first controller, a first C-Rate of a Rechargeable Energy Storage System (RESS). Also, the method includes comparing the first C-Rate to a first predetermined threshold. The method also includes when the first C-Rate exceeds the first predetermined threshold, the first controller sending a first request to the second controller to adjust a load of the EPA. The method further includes the second controller determining a first operational mode of the EPA based on the first request. Also the method includes when the first operational mode of the EPA allows a load change, the second controller adjusting the load of the EPA.

A hybrid vehicle, an air conditioning system and a method for controlling the air conditioning system are provided. The air conditioning system includes: an electric compressor; a mechanical compressor, connected with the electric compressor in parallel; a power battery, connected with the electric compressor and configured to supply power to the electric compressor; an engine, connected with the mechanical compressor and configured to supply a power source to the mechanical compressor; an engine controller, connected with the engine and configured to start the engine when the mechanical compressor is to be started; a battery manager, connected with the power battery and configured to detect a state of charge of the power battery; and a controller, connected with the engine controller and the battery manager and configured to start the electric compressor and the mechanical compressor at different time according to the state of charge of the power battery.

A parking cooler which is capable of battery powered operation during engine off operation. The parking cooler or air conditioning system may vary in cooling capacities to maximize cooling or maximize battery life. The parking cooler includes one or more additional cooling mechanicals within either of two housings to accommodate variation of cooling capacity.