Refrigeration – Disparate apparatus utilized as heat source or absorber – With vapor compression system
Patent
1999-03-18
2000-07-25
Tapolcai, William E.
Refrigeration
Disparate apparatus utilized as heat source or absorber
With vapor compression system
623231, 165 43, F25B 2702
Patent
active
060923830
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a device for cooling the engine of a motor vehicle and for air conditioning the passenger compartment of the vehicle, comprising the engine and a heat exchanger through which flows air to be directed into the passenger compartment, and an expansion unit and an evaporator, the condenser and the evaporator being adapted to transfer heat from a first medium in contact with the evaporator to a second medium in contact with the condenser via the refrigerant fluid to cool said flow of air.
In a device of the above kind the first medium and the second medium are conventionally the external atmosphere and said flow of air, respectively. The condenser is generally at the front end of the vehicle so as to receive directly the flow of atmospheric air caused by the movement of the vehicle. The evaporator is disposed in the passenger compartment, within an air conditioning unit, so that the flow of air to be directed into the passenger compartment flows through it in series or in parallel with the heat exchanger.
The compressor is usually driven by the engine of the vehicle and consequently is located near the engine.
The components of the refrigerant fluid circuit are therefore dispersed, which necessitates long connecting pipes in the engine compartment of the vehicle, which are costly and introduce the risk of leaks. The pipes must be removed to enable work to be carried out in the engine compartment, and this necessitates refilling of the circuit.
The aim of the invention is to remedy the above drawbacks.
BRIEF DESCRIPTION OF THE INVENTION
The invention is directed in particular to a device of the kind defined in the introduction and provides for said first and second media to comprise the heat-conveying fluid flowing in the first circuit, the latter including supply means for supplying said heat exchanger with hot fluid from the engine and/or fluid cooled by the evaporator, to regulate the temperature of said flow of air.
Because the respective flows of air defined above no longer have to pass through the condenser and the evaporator, the latter can be disposed as required, and in particular very close to each other and very close to the compressor, which eliminates the connecting pipes or reduces their length.
Complementary or alternative optional features of the invention are as follows: and cooled fluids. evaporator and to the heat exchanger. radiator. exchanger, which fraction can vary in the range 0% to 100%. radiator and the heat exchanger are sent to the engine. evaporator is cooled more than the fraction sent to the engine. other. engine. module.
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the invention will be explained in more detail in the following description with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a device in accordance with the invention; and
FIG. 2 is a diagrammatic perspective view of the device.
DETAILED DESCRIPTION OF DRAWINGS
The device shown in FIG. 1 comprises a circuit in which flows a heat-conveying fluid such as an aqueous solution of ethylene glycol used in particular to cool the internal combustion engine 1 that drives the motor vehicle on which the device is mounted. One branch 2 of the circuit conveys the heat-conveying fluid from the outlet 3 from the engine to a connecting point A. A pipe 4 leads from the point A to the inlet connector 5 of a cooling radiator 6, that inlet connector being on a fluid box 7 divided into two compartments by a partition 8. Another fluid box 9 of the radiator 6 is divided by a partition 10 into two compartments that respectively communicate with outlet connectors 11 and 12. Thus the fluid 2 can leave the radiator either via the connector 11 after a single pass or via the connector 12 after three passes. A pipe 13 leads from the connector 11 to a circulating pump 15 at the inlet of the engine 1.
The second outlet connector 12 of the radiator 6 is connected via a pipe 16 to the heat-conveying fluid inlet connector 17 of a condens
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Tapolcai William E.
Valeo Thermique Moteur
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