A vehicle air conditioner with a refrigerant circuit has as components at least one evaporator, a refrigerant compressor, a refrigerant condenser, an expansion valve associated with the evaporator and at least one heat exchanger with an associated expansion valve for coupling with a coolant circuit of a heat source, wherein the components are connected by a refrigerant line. A refrigerant container is provided which is connected on the high-pressure side of the refrigerant compressor with the refrigerant line and has a refrigerant-receiving chamber with a controllable volume, and a control unit is provided with which the volume of the chamber of the refrigerant container is controlled as a function of operating parameters of the refrigerant circuit. Alternatively, the refrigerant container is connected on the high-pressure side of the refrigerant compressor with the refrigerant line by way of a branch line.

A vehicle air conditioner capable of making a determination that the dehumidification is unnecessary in a vehicle interior early to make a prompt transition from a dehumidifying mode to a heating mode and reduce power consumption is provided. A control device executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator, decompress the refrigerant, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, and a dehumidifying mode to let the refrigerant flow into the outdoor heat exchanger without flowing to the radiator to radiate heat therein, decompress the refrigerant, and then let the refrigerant absorb heat in a heat absorber 9 and let an auxiliary heater 23 generate heat. The control device shifts from the dehumidifying mode to the heating mode on the basis of the heat absorber suction air temperature Tevain being lowered more than a target heat absorber temperature TEO.

A transport refrigeration unit system (26) for cooling a trailer compartment (24) is provided. The transport refrigeration unit system (26) includes an engine for controlling a cooling rate capacity, the engine operable at a nominal high speed and a nominal low speed. Also included is a controller (50) in operative communication with the engine to control an engine speed of the engine. Further included is a user interface (52) in operative communication with the controller (50), the user interface (52) providing a high capacity cooling mode to a user, wherein initiation of the high capacity cooling mode includes the engine operating at a speed greater than the nominal high speed to result in a high capacity cooling rate.

The present disclosure relates to the field of hybrid air conditioning for automobiles and controlling system thereof, and envisages a hybrid air conditioning system (10) for cooling a passenger cabin of an automobile having an engine (30). The system (10) comprises a metal hydride based air conditioning subsystem, a vapor compression based air conditioning subsystem, a first sensor, a second sensor and a control unit. The first sensor is mounted in the passenger cabin to sense temperature inside the passenger cabin to generate a first sensed signal. The second sensor is configured to sense temperature of exhaust gases to generate a second sensed signal. The control unit cooperates with the first sensor and the second sensor, to selectively actuate either the metal hydride based air conditioning subsystem or the vapor compression based air conditioning subsystem based on the first and second sensed signals.

A vehicular cooling device includes: a main cooling system including a compressor, a condenser, a liquid receiver, an expansion valve, an evaporator, a first refrigerant flow line connecting the compressor and the condenser, a second refrigerant flow line connecting the condenser and the liquid receiver, a third refrigerant flow line connecting the liquid receiver and the expansion valve, a fourth refrigerant flow line connecting the expansion valve and the evaporator, and a fifth refrigerant flow line connecting the evaporator and the compressor; and a sub-cooling system for enabling the refrigerant to flow to including the liquid receiver, the third refrigerant flow line, the expansion valve, the fourth refrigerant flow line, the evaporator, and a pre-cooling means disposed between the evaporator and the compressor, an absorbent tank storing an absorbent and a sixth refrigerant flow line connecting the absorbent tank to the fifth refrigerant flow line.

A vehicle air conditioner capable of making a determination that the dehumidification is unnecessary in a vehicle interior early to make a prompt transition from a dehumidifying mode to a heating mode and reduce power consumption is provided. A control device executes a heating mode to let a refrigerant discharged from a compressor 2 radiate heat in a radiator, decompress the refrigerant, and then let the refrigerant absorb heat in an outdoor heat exchanger 7, and a dehumidifying mode to let the refrigerant flow into the outdoor heat exchanger without flowing to the radiator to radiate heat therein, decompress the refrigerant, and then let the refrigerant absorb heat in a heat absorber 9 and let an auxiliary heater 23 generate heat. The control device shifts from the dehumidifying mode to the heating mode on the basis of the heat absorber suction air temperature Tevain being lowered more than a target heat absorber temperature TEO.

This disclosure provides a control method and control system for two or more air-conditioning water chilling units, and air conditioning system. The control method includes: receiving at least one standby request generated by at least one air-conditioner water chilling unit of the two or more air-conditioning water chilling units based on a standby condition; determining whether or not two or more standby requests are received; generating standby sequence numbers of the air-conditioning water chilling units that send the standby requests according to the standby requests in case where two or more standby requests are received; and closing the air-conditioning water chilling units that send the standby requests according to a preset rule based on the standby sequence numbers.

A vehicle air conditioner includes a bypass passage configured to cause a coolant to circulate while bypassing a heater core, a switching device set to switch between a first mode in which the coolant flows through the bypass passage and returns to an internal combustion engine while bypassing the heater core and a second mode in which the coolant flows to the heater core, a coolant-temperature sensor that detects a temperature of the coolant at a part through which the coolant flows in both the first mode and the second mode, and a control unit that controls an operation of a blower based on the coolant-temperature control data. Furthermore, first and second calculating portions are configured to calculate the coolant-temperature control data in the first and second modes, respectively. The first calculating portion calculates the coolant-temperature control data based on the temperature of the coolant detected at start-up of the internal combustion engine, and the second calculating portion sets, as the coolant-temperature control data, a temperature lower than the detected temperature of the coolant.

Illustrative examples of a vehicle system and associated methods may be directed to monitoring one or more vehicle components to prevent excess temperatures or heat. A thermal controller may be configured to determine a timer based on a predicted thermal input, and based on the timer, compare a temperature of the vehicle component to a temperature threshold. The thermal controller may be further configured to send an instruction to reduce the temperature of the vehicle component based on the comparison of the temperature to the temperature threshold.

An externally-controlled variable displacement compressor (EVDC) cold-start method is described including, during an EVDC cold-start procedure, iteratively alternating an amount of a control current supplied to an electronic control valve (ECV) associated with the EVDC between no control current and a full control current. Systems for implementing the described method are provided.