Abstract: A device for air-conditioning a motor vehicle has an engine-cooling loop, a heat-pump loop containing a compressor, an evaporator as cold source of the heat pump and a condenser as hot source of the heat pump. The condenser is integrated into the engine-cooling loop upstream of the air heater. An air-conditioning branch has a condenser and an evaporator with an upstream end connected to the heat-pump loop downstream of the compressor, and a downstream end connected to the heat-pump loop upstream of the compressor. Switching means make it possible to make the refrigerant fluid circulate either in the heat-pump loop, or in the heat-pump branch, in such a way as to form a heat-pump loop.

Abstract: A refrigerant fluid circuit for a motor vehicle includes an air conditioning loop and a heating loop, the heating loop comprising a heating branch. A variable opening valve is connected in the heating loop. This valve is controllable so as not only to control the distribution of the refrigerant fluid flowing in the circuit into the heating loop, but also to control the expansion of the fluid in its gaseous state in the heating loop in the additional heating mode.

Abstract: Refrigerant fluid such as CO2, compressed to the supercritical pressure by a compressor, is delivered selectively through a three-way valve, either into a branch of the circuit containing a cooler, an expansion device and an evaporator for cooling the cabin of a vehicle, or into a branch containing another expansion device and a heat exchanger for the purpose of heating the cabin.

Abstract: In a heating and air conditioning installation for a motor vehicle, the refrigerant fluid circuit includes a cooling (air conditioning) loop including a condenser, and a heating loop. In order to detect excess pressure in the refrigerant fluid in the condenser, during corrective discharges of the fluid to the condenser from the heating loop, the frequency of occurrence of these discharges is monitored continuously, and an evaluation is made as to whether the measured frequency exceeds a threshold value. The outlet pressure of the compressor is also monitored continuously, an evaluation being made as to whether the measured pressure exceeds a predetermined demand pressure by an excess value over a given period of time.

Abstract: The CO2 refrigerant fluid, compressed by the compressor to a supercritical pressure, is delivered through a three-way valve selectively into a cooler and/or into a bypass branch, so that in the former case, after passing through an expansion device, the fluid is vaporised in an evaporator so as to cool the cabin of the vehicle; while flow of the fluid through the bypass branch avoids the cooler so that the fluid is then cooled in the evaporator, thereby heating the cabin.

Abstract: The invention relates to a pharmaceutical composition comprising an antiviral compound selected from the group consisting of foscarnet, acyclovir, valaciclovir, penciclovir and famciclovir, in admixture with galactolipids and a polar solvent. The pharmaceutical composition can be used in a prophylactic and/or curative treatment of herpesvirus infections in mammals including man, by topical or parenteral administration.

Abstract: In a motor vehicle air conditioning apparatus, the fluid flowing in the circuit of the apparatus flows in a bypass branch, bypassing the condenser, in a heating mode of the apparatus. The evaporator then receives the fluid in a gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator can be used for heating the cabin when that produced by the engine of the vehicle is insufficient. A control unit provides special control of the variable capacity of the compressor which is compatible with the heating mode.

Abstract: The pressure of the fluid at the outlet of the compressor is measured by a pressure sensor connected to a control module. When the fluid circulates in a heating loop not comprising a condenser, so as to heat a flow of air by heat exchange in the evaporator, and pressure oscillations indicating the presence of liquid are detected, the momentary opening of a discharge valve is triggered to send a portion of the fluid into the condenser of the air conditioning loop. The presence of liquid is thus detected and eliminated without having recourse to special sensors.

Abstract: The invention relates to a pharmaceutical composition for topical administration comprising a combination of foscarnet and an antiinflammatory glucocorticoid, in admixture with a carrier based on galactolipids and a polar solvent. The pharmaceutical composition can be used in a prophylactic and/or curative treatment of herpesvirus infections in mammals including man.The invention also relates to the use of said pharmaceutical composition in the manufacture of a medicament for said prophylactic or curative treatment.

Abstract: In the heating mode, the fluid in the air conditioning circuit flows in a bypass branch avoiding the condenser. The evaporator then receives the fluid in the gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator can be used for heating the cabin when that which is produced by the propulsion engine of the vehicle is insufficient.In addition, the fluid pressure at the inlet of the evaporator, and therefor the calorific power produced by the latter, is adjusted by a pressure regulator disposed in the bypass branch.

Abstract: A refrigerant fluid circuit for a motor vehicle air conditioning installation has three branches, with two three-way valves for selectively passing fluid from the first branch into either the second branch to establish a cooling loop, or into the third branch to establish a heating loop. The three-way valves and a second expansion device in the third branch of the circuit, are incorporated in a modular component which comprises a monobloc body; the monobloc body having three body ports for connection in the three branches of the circuit, and further body ports which are arranged to be connected to the inlet and outlet, respectively of the compressor of the circuit.

Abstract: A refrigerant fluid circuit for air conditioning a motor vehicle has three branches, including a first branch having an evaporator and a compressor, the three branches having a common junction point. The circuit includes a monobloc component comprising a body having three body ports for connection to the three branches of the circuit respectively. The common junction point is formed within the body of the monobloc component, which also contains an expansion device of the circuit, situated between the second body port and the junction point. The body also includes a direct cross passage which is connected in the first circuit branch between the evaporator and the compressor.

Abstract: The compressor (3) of the refrigerating fluid circuit is driven by the thermal engine (1) of the vehicle when the latter is functioning and, when parked, by the alternator (2). The latter, fed with three-phase current from an auxiliary battery (10) so as to function as a motor, and the compressor (3), are then disconnected from the crankshaft (20) by a free-wheel mechanism (7). The preliminary air conditioning of the vehicle when parked is thus provided without a special electric motor for driving the compressor, with reduced expenditure of energy by virtue of the feeding of the alternator with three-phase current, and without any risk of exhaustion of the main battery by virtue of the auxiliary battery (10).

Abstract: A connector assembly, and associated method, connects a first circuit element portion and a second circuit element portion of a radio frequency circuit device together. Isolated conduction of a radio frequency signal between the first and second circuit element portions is provided. Appropriate selection of the relative dimensions of the connector assembly permits the characteristic impedance of the connector assembly to match the characteristic impedance of the circuit element portions.

Abstract: An air conditioning circuit of a motor vehicle is used for heating the cabin of the vehicle. The air conditioning circuit accordingly operates in a cooling mode and a heating mode, selectively. In the heating mode, the refrigerant fluid flowing in the air conditioning circuit flows in a branch of the circuit which bypasses the condenser. The evaporator therefore receives this fluid in the gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator can be used for heating the cabin when that produced by the engine of the vehicle is insufficient for this purpose. To this end, an ejector draws a complementary mass of fluid into the heating loop for the purpose of adjusting the heat energy produced.

Abstract: In a heating mode, the fluid in the air conditioning circuit flows in a bypass branch avoiding the condenser. The evaporator then receives the fluid in the gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator may be employed to heat the cabin when that produced by the drive motor of the vehicle is insufficient. In addition, special configurations of the circuit enable the mass of fluid flowing in the heating loop to be increased or reduced with a view to regulating the calorific power produced.

Abstract: A motor vehicle air conditioning system includes an adjustable position air inlet valve for controlling the relative proportions of recirculated air and fresh air from outside entering the system. A first sensor and a second sensor give respective measurement signals representing the inside temperature of the cabin and the outside temperature. The occupant of the vehicle can set a required value of inside temperature on a data unit, which memorizing this setting. The installation includes a processor for computing the difference between the actual inside temperature and its required value, and for memorizing at least one first temperature threshold value. The processor makes a first comparison between this first threshold value and the computed absolute value of the temperature difference, and then performs a second comparison between the inside and outside temperatures.

Abstract: A temperature control device for an electric motor vehicle passenger compartment, wherein a fluid coolant flows through an inner heat exchanger arranged in the path of an air flow to the passenger compartment, a first outer heat exchanger arranged in the path of an air flow out of the passenger compartment, and a second outer heat exchanger ?(42)! for exchanging heat with a heat source outside the passenger compartment. Said device may operate in heating mode or in cooling mode depending on the direction of flow of the fluid coolant. The device is useful in motor vehicles.