Disclosed are climate systems for vehicles and methods for controlling the climate systems. In some implementations, a climate system includes: (1) a temperature sensor configured to measure a temperature within the compartment of the vehicle; (2) a user interface configured to receive a desired temperature from a user; (3) a first compressor powered by an engine of the vehicle to compress a refrigerant; (4) a second compressor driven by an electric motor to compress the refrigerant; and (5) a controller electrically coupled to the first compressor and the second compressor. The controller configured to: (1) calculate a thermal load of the compartment based on a difference between a desired temperature and a measured temperature; and, (2) based on the calculated load, selectively activate: (i) the engine, (ii) the first compressor, and/or (iii) the second compressor.

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.

The various implementations described herein include methods, devices, and systems for starting-up a vehicle air-conditioning system. In one aspect, a method is performed at a vehicle air-conditioning system including a blower fan, a condenser fan, and a compressor electrically coupled to a battery system. The method includes: (1) starting the blower fan; (2) after starting the blower fan, measuring a first current drawn from the battery system, the first current indicative of current drawn by the blower fan; (3) in accordance with a determination that the first current meets predefined criteria, starting the condenser fan; (4) after starting the condenser fan, measuring a second current drawn from the battery system, where the difference between the second current and the first current is indicative of current drawn by the condenser fan; and (5) in accordance with a determination that the second current meets predefined second criteria, starting the compressor.

A system and method for controlling a transport heating, ventilation, and air conditioning (HVAC) system having a fresh air intake is disclosed. The fresh airflow intake system includes a fresh air damper configured to regulate a flow of fresh air into the transport HVAC system, an evaporator fan having at least a high-speed mode and a low speed mode, and a controller. The controller is configured to determine whether a fresh air condition is met and increase a fresh airflow in response to determining the fresh air condition is met. The controller is further configured to increase an evaporator fan speed when the fresh airflow is increased.

A plurality of fans is connectable to a heat exchanger arrangement having a plurality of separated cooling loops. At least one of the fans is operable to move air through at least two of the cooling loops, and at least one other fan is operable to move air through at least one of the cooling loops. A control system includes at least one controller and is operable to control each of the at least one fan using a respective control strategy correlating temperature values with fan outputs, and to control each of the at least one other fan using a respective control strategy that is different from each control strategy used to control the at least one fan.

A system is provided that includes mode, engine, and battery modules. The mode module is configured to determine whether to operate in an engine mode or a battery mode based on parameters. The engine module, while operating in the engine mode, runs a compressor at a first speed based on a temperature within a temperature controlled container of a vehicle and permits passage of refrigerant through eutectic plates independent of the temperature. A battery, while in the engine mode, is charged based on power received from an electrical source. The battery module, while operating in the battery mode and based on the temperature, runs the compressor at a second speed and prevents passage of the refrigerant through the eutectic plates. While in the battery mode, the battery is not being charged based on power from a shore power source and the electrical source from which power is received during the engine mode.

A system is provided that includes mode, shore power, engine, and battery modules. The mode module determines whether to operate in a shore power, engine, or battery mode based on parameters. The shore power module, while in the shore power mode, runs a compressor at a speed based on a temperature within a container of a vehicle and limits the speed to a first speed. A battery is charged based on utility power while in the shore power mode. The engine module, while in the engine mode, limits the compressor speed to a second speed. The battery, while in the engine mode, is charged based on power received from an alternator/generator. The battery module, while in the battery mode, limits the compressor speed to a third speed. While in the battery mode, the battery is not being charged based on power from a shore power source and the alternator/generator.

An air conditioning and refrigeration system for a container equipped with a transport refrigeration unit (TRU) is disclosed. The system comprises a variable speed fan configured with the TRU, and one or more first sensors positioned at predefined positions at a rear section of a conservation space associated with the container. The one or more first sensors are configured to monitor one or more first attributes associated with the rear section. The system further comprises a controller in communication with the one or more first sensors and the fan. The controller is configured to adjust speed of the fan and/or adjust cooling capacity of the TRU based on the monitored first attributes of the rear section, to maintain a predefined environment at the rear section or across the conservation space.

In an embodiment, an apparatus includes a processor including logic to determine from data received from one or more sensors, whether the apparatus is in physical contact with a user. The logic is further to set a power management policy of the apparatus based on a processor context, where the processor context is determined based at least in part on whether the apparatus is in physical contact with the user, and where the power management policy is used by the logic to determine a level of power consumption at which to operate the processor. Other embodiments are described and claimed.

There is disclosed a vehicular air-conditioning device of a so-called heat pump system which eliminates or decreases noise generated when an opening/closing valve opens at a changing time of an operation mode. The vehicular air-conditioning device executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, decompress the refrigerant by which heat has been radiated, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, and a dehumidifying and heating mode to open a solenoid valve 22 in a state of the heating mode, decompress at least a part of the refrigerant flowing out from the radiator and then let the refrigerant absorb heat in a heat absorber 9. When the heating mode changes to the dehumidifying and heating mode, the controller decreases a radiator pressure or a pressure difference before and after the solenoid valve to a predetermined value or less, and then opens the solenoid valve 22.