Abstract: An air-conditioning system for vehicle temperature control incorporates a thermostat having contacts, and a circulation contour, including a condenser, an expansion valve essentially connected with the condenser, an evaporator connected sequentially with the expansion valve, a first tee splitter connected to a common line, a second tee splitter connected to the condenser, a main compressor connected with the first tee splitter and with the second tee splitter, a supplemental compressor connected with the first tee splitter and the second tee splitter. The supplemental compressor is operatively controlled by the thermostat and powered by a supplemental battery. In embodiments, the supplemental compressor is electrically connected with the supplemental battery and operatively controlled by a control circuitry including a power relay, an air-condition relay, and the contacts of thermostat. The proposed system reduces pollutions and saves energy.

Abstract: An air-conditioning system for vehicle temperature control incorporates a thermostat having contacts, and a circulation contour, including a condenser, an expansion valve essentially connected with the condenser, an evaporator connected sequentially with the expansion valve, a first tee splitter connected to a common line, a second tee splitter connected to the condenser, a main compressor connected with the first tee splitter and with the second tee splitter, a supplemental compressor connected with the first tee splitter and the second tee splitter. The supplemental compressor is operatively controlled by the thermostat and powered by a supplemental battery. In embodiments, the supplemental compressor is electrically connected with the supplemental battery and operatively controlled by a control circuitry including a power relay, an air-condition relay, and the contacts of thermostat. The proposed system reduces pollutions and saves energy.

Abstract: An air-conditioning system embodiment for temperature control in a vehicle comprises heater cores, controllably connected to a coolant contour, outletting the conditioned air towards a person sitting in a chair, or into a food compartment. Some cores are mounted inside of chairs' backs situated in front of rear passengers, other cores are mounted in the chair back and inside the chair seat. A refrigerant-coolant heat exchanger provides heat exchange between a refrigerant contour and the coolant contour, cooling the coolant supplied to the cores. A refrigerant compressor is driven by a hydraulic motor, operated by pressurized oil delivered through a hydraulic contour from a first hydraulic pump driven by the vehicle's engine connected to the first pump through an electromagnetic clutch, or alternatively from a second hydraulic pump driven by a substitute engine, connected to the second pump through another electromagnetic clutch, both clutches are controlled by a thermostat.

Abstract: A device for air temperature control in a vehicle has a unit forming a first circuit for circulation of an coolant, a unit forming a second circuit for circulation of a refrigerant, a unit for connecting the first circuit with an engine for heating the coolant, a unit for providing a heat exchange between the second circuit and the first circuit for cooling the coolant, a single air temperature regulating element, and a unit for alternatively connecting the first a unit to the air temperature regulating element so that when the coolant is heated from the engine and supplied through the first a unit the air temperature regulating element heats air in the vehicle, or connecting the second a unit with the common air temperature regulating element so that when the coolant in the first circuit is cooled by heat exchange with the refrigerant of the second circuit and the cooled coolant is supplied to the air temperature regulating element to cool air in the vehicle, and a heat exchanger which provides a heat exchan