Refrigeration – Refrigeration producer – Compressor-condenser-evaporator circuit
Patent
1997-02-21
1999-04-27
Tapolcai, William E.
Refrigeration
Refrigeration producer
Compressor-condenser-evaporator circuit
62509, 165132, 165173, F25B 3904
Patent
active
058967540
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a condenser which can form part of a refrigeration circuit, for example part of an air conditioning system for a motor vehicle.
It relates more specifically to a condenser for a refrigeration circuit through which a refrigerant travels, comprising a bundle of tubes which is mounted between two manifolds, an inlet for the gaseous refrigerant, an outlet for the condensed refrigerant, as well as a reservoir through which the refrigerant can pass.
In a refrigeration circuit of this type, the refrigerant is sent, in superheated vapor phase, under the action of a compressor, toward the condenser where it is in turn cooled or "unsuperheated", condensed into a hot liquid phase, then "supercooled" into a cold liquid phase.
The condensed and cooled refrigerant is then sent, via a pressure reducer, toward an evaporator where it exchanges heat with an airflow to be sent into the cabin of the vehicle. In the evaporator, the refrigerant is converted into the vapor phase, while the airflow is cooled to provide air-conditioned air. The refrigerant in the vapor phase leaves the evaporator to return thereafter to the compressor and carry out another operating cycle.
In condensers of this type, the reservoir is usually produced in the form of a separate receptacle also known as a "bottle" which is placed in the circuit between the condenser and the pressure reducer.
Also known, from French Patent Application No. 93 10325, is a condenser of this type in which the reservoir is built into the condenser by being fixed on the outside of one of the manifolds.
This known solution requires the provision of connections and holding lugs between the reservoir and the manifold, which makes the assembly of the condenser, especially the brazing operations, complicated.
Furthermore, this known solution increases the bulk of the condenser owing to the fact that the reservoir is arranged outside one of the manifolds.
What is more, the external reservoir constitutes an element which is mounted in cantilever fashion and generates vibration at the condenser.
The object of the invention is especially to overcome the aforementioned drawbacks.
It therefore proposes a condenser of the type defined in the introduction, in which the reservoir is produced in the form of a receptacle housed in a first manifold and communicating, via at least one opening, with a downstream part of the bundle on the outlet side of the condenser.
It is thus no longer necessary to provide connections and holding lugs between the reservoir and the manifold, owing to the fact that the reservoir is housed inside the manifold.
It is thus possible to produce the reservoir and manifold as a single piece, something which requires assembly operations which are less complicated and less time-consuming.
This appreciably simplifies brazing operations.
The condenser of the invention also has the advantage of offering reduced bulk, owing to the fact that the external reservoir is eliminated.
Furthermore, it better withstands vibration on account of the fact that it eliminates any element mounted in cantilever fashion outside the manifold.
In a first embodiment of the invention, the manifold comprises a tubular side wall, while the reservoir comprises a side wall which is at least partially spaced away from the side wall of the manifold, transverse partitions being provided between the side wall of the manifold and the side wall of the reservoir so as to define peripheral compartments communicating with different parts of the tube bundle so as to allow multipass circulation of the refrigerant through the tube bundle.
Advantageously, the side wall of the reservoir comprises an opening for the inlet of refrigerant coming from a peripheral compartment and an outlet for removing condensed refrigerant toward a second peripheral compartment, which communicates with the outlet of the condenser through a part of the bundle.
Thus the condensed refrigerant passes through the reservoir and then leaves the condenser after having passed through part of the bundle.
As an alte
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Balthazard Patrick
Faille Philippe
Tapolcai William E.
Valeo Thermique Moteur
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