Heat exchange – With impeller or conveyor moving exchange material – Mechanical gas pump
Patent
1997-02-21
1999-02-09
Leo, Leonard R.
Heat exchange
With impeller or conveyor moving exchange material
Mechanical gas pump
174117FF, F28F 700
Patent
active
058681973
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for electrically connecting up a motor/fan unit mounted on the body of a heat exchanger, particularly of a radiator used to cool the combustion engine of a motor vehicle.
It applies particularly to the electric connecting-up of a motor/fan unit comprising an electric motor fixed to the body of the heat exchanger and driving a fan arranged facing a large face of the finned body.
A heat exchanger of this type is already known, from the publication of French Patent No. 2 573 128.
In such a heat exchanger, the electric motor of the motor/fan unit is fixed directly to the body of the heat exchanger, which is contrary to the conventional solutions in which this motor is fixed either to the heat exchanger by means of cross members or to the bodywork or to the chassis of the vehicle.
This results especially in a reduction of the bulk of the heat exchanger/motor/fan unit assembly, in a reduction of the vibrations generated by the fan and in better flow of the air passing through the finned body.
However, in a heat exchanger according to the aforementioned publication, the motor is arranged between the fan and a large face of the body of the heat exchanger, and this presents a problem in the electrical connecting-up of the motor/fan unit by comparison with the traditional solutions in which the motor of the motor/fan unit lies on the other side of the fan with respect to the finned body.
To solve this problem the Applicant Company has already conceived a number of solutions which consist in making a bundle of electric cables run along at least part of the large face of the body of the exchanger, and in keeping this bundle pressed against the finned body so that it is completely out of contact with the fan, as taught in French Patent Application No. 95 01044 (unpublished).
The invention has just brought another solution to this problem by proposing a connection device which offers easier assembly and avoids any risk of the electric wires being cut.
For this purpose it proposes a connecting-up device of the type defined in the introduction, which comprises an elongate strip capable of being laid out flat along the large face of the body and is formed of an insulating core in which at least two electric conductors are embedded, a first connector provided at a first end of the strip and capable of being connected up to a connector of the electric motor, and a second connector provided at a second end of the strip and capable of being connected up to a connector of an electric control circuit.
Thus a device is obtained which can easily be connected both to the electric motor of the motor/fan unit and to the electric control circuit.
Furthermore, the electric conductors are embedded in an insulating core which acts as an extension piece between the two connectors and they are thus protected.
In this way any risk of the electric conductors being cut or damaged either as a result of accidental contact with the fan or as a result of rubbing caused by the body of the exchanger, which usually comprises fins with sharp edges is avoided.
According to another feature of the invention, the strip together with the first connector and the second connector form a single-piece assembly.
Advantageously, the strip has a cross section in the overall shape of a flattened rectangle of small thickness, the electric conductors being embedded within the thickness of the strip.
Advantageously, the electric conductors are produced in the form of flattened blades, which makes them easier to integrate into the thickness of the strip.
The invention also makes provision for the strip to be fitted with a stiffening rib which stretches along at least part of its length and which points in a direction perpendicular to the plane of the large face.
As a preference, this rib has a height which decreases from the first connector in the direction of the second connector and which has a minimum value at the periphery of the fan.
Thus there is no risk of this rib impairing the passage of the fan, which generally comprises a
REFERENCES:
patent: 3061277 (1962-10-01), Anderson
patent: 3324938 (1967-06-01), Berkoff
patent: 4210833 (1980-07-01), Neveux
patent: 4664459 (1987-05-01), Flanagan et al.
patent: 4832621 (1989-05-01), Asai et al.
patent: 5002019 (1991-03-01), Klaucke et al.
patent: 5083238 (1992-01-01), Bousman
Leo Leonard R.
Valeo Thermique Moteur
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