FR3064541A1 - INTAKE DEVICE INTO A DASHBOARD OF A MOTOR VEHICLE - Google Patents

Abstract

The invention relates to a ventilation device comprising a fixed structure (1) in which a main duct (2) of air flow is integrated to a main outlet (3) through a plurality of flaps ( 4) adapted to direct the air opening through this outlet, characterized in that it comprises a bypass path (5) connecting the main duct (2) upstream of the main outlet (3) to a secondary outlet (6) distinct from the main outlet (3), shaped to allow an evacuation of a portion of the air flowing in the duct (2), so as to limit the losses of air flow and overspeeds s' discharging through the main outlet (3).

Description

© Publication number: 3,064,541 (to be used only for reproduction orders) (© National registration number: 17 52838 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

COURBEVOIE © IntCI ⁸

B 60 H 1/24 (2017.01), B 60 H 1/34

A1 PATENT APPLICATION

©) Date of filing: 03.04.17. (© Applicant (s): RENAULT S.A.S. Joint-stock company (© Priority: simplified - FR. @ Inventor (s): CORRE JEAN-MARIE and DAGOREAU ALAIN. (43) Date of public availability of the request: 05.10.18 Bulletin 18/40. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ©) Holder (s): RENAULT S.A.S. Joint-stock company related: simplified. ©) Extension request (s): © Agent (s): RENAULT SAS.

(34) AERATION DEVICE INTEGRATED INTO A DASHBOARD OF A MOTOR VEHICLE.

FR 3 064 541 - A1

The invention relates to a ventilation device comprising a fixed structure (1) in which a main air flow duct (2) is integrated to a main outlet (3) through a plurality of flaps ( 4) capable of directing the air emerging through this outlet, characterized in that it comprises a bypass path (5) connecting the main duct (2) upstream of the main outlet (3) to a secondary outlet (6) separate from the main outlet (3), shaped to allow a discharge of part of the air flowing in the duct (2), so as to limit the pressure losses and overspeeds of air flow discharging through the main outlet (3).

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Ventilation device integrated into a dashboard of a motor vehicle

Field of the invention:

The present invention relates to a ventilation device, typically integrated into a dashboard of a motor vehicle, and through which air flows from the HVAC system (in English "Heating, Ventilation and Air Conditioning") allowing heating, ventilation and air conditioning of the passenger compartment of the vehicle.

State of the art:

Motor vehicles have multiple interior ventilation systems. Conventionally, the dashboard of a vehicle has at least two air outlets, also called "aerator", provided with flaps or adjustable fins for the purpose of regulating the direction of air flow.

In the context of new vehicle concepts, new possibilities of style and layout are sought, which lead, among other things, to reducing the size of the aerators, compared to the conventional dimensions of the prior art.

This reduction in size generates pressure drops (pressure) and overspeeds which result in whistling unacceptable to the occupants of the vehicle.

Purpose of the invention:

The purpose of the invention is to overcome all or part of the preceding drawbacks by proposing an aeration device which prevents pressure drops and limits the overspeeds of air flow at the aerators.

Object of the invention:

The invention relates to a ventilation device comprising a fixed structure in which is integrated a main air flow duct to a main outlet through a plurality of flaps capable of directing the air emerging through this outlet, characterized in that it comprises a bypass path connecting the main duct upstream of the main outlet to a secondary outlet distinct from the main outlet, shaped to allow a discharge of part of the flowing air in the duct, so as to limit the pressure losses and overspeeds of air flow discharging through the main outlet. This device provides an exhaust, otherwise known as "clearance" in the main duct, preventing the pressure drop and limiting the air flow speed. Whistling phenomena are eliminated or significantly reduced.

According to other advantageous features of the invention:

- the diversion track is connected to the main duct in an area whose distance from the main outlet is less than 200 mm;

- the diversion track has a longitudinal axis forming an angle between 30 and 60 ° with a longitudinal axis of the main duct, in particular an angle of about 45 °;

- the diversion track and the main conduit are connected directly to each other without separation means;

- the bypass track and the main duct are connected to each other by a zone provided with a valve articulated between a closed position of the bypass track under the influence of a return spring, when the air pressure in the main duct is less than a predetermined threshold value, and an open position giving access to the bypass path against the return spring when the air pressure in the main duct is greater than a predetermined threshold value.

- the main conduit and the bypass path are made in one piece, for example from injected plastic.

The invention also relates to a dashboard of a motor vehicle comprising at least one ventilation device having all or some of the preceding characteristics.

The invention also relates to a motor vehicle comprising a dashboard having the above characteristics.

Statement of the invention:

The invention will be better understood on reading the following description of a nonlimiting example of the invention, and in the light of the appended drawings in which:

- Figure 1 shows a cross-sectional view of a known ventilation device of a motor vehicle, according to the prior art;

FIG. 2 represents a cross-sectional view of a ventilation device according to a first embodiment of the invention, and

- Figure 3 shows a cross-sectional view of a ventilation device according to a second embodiment of the invention.

FIG. 1 shows a ventilation device known from the prior art. This ventilation device conventionally comprises a fixed structure 1 in which is integrated a main duct 2 for air flow to a main outlet 3, also called "aerator" through a plurality of flaps 4 able to orient the air emerging through this outlet. In the example presented, the flaps 4 consist of a first series of directivity fins articulated on the structure 1 around substantially horizontal axes making it possible to adjust the up / down direction of the air flow, and of a second series of directivity fins, closer to the outlet without the example illustrated, these fins being articulated on the structure 1 around a substantially vertical axis making it possible to adjust the left / right direction of the air flow.

The ventilation device of the invention incorporating these characteristics of the prior art, the same references have been assigned to the common characteristics, as illustrated in FIGS. 2 and 3. FIGS. 2 and 3 respectively illustrate a first and a second mode of realization of the invention as described below.

The ventilation device of the invention comprises a bypass path 5 connecting the main conduit 2 upstream of the main outlet 3 to a secondary outlet 6 separate from the main outlet 3. This bypass path is shaped to allow evacuation of '' part of the air flowing in the duct 2, so as to limit the pressure losses (pressure loss) and overspeeds of air flow evacuating through the main outlet 3. Thus the track bypass regulates the flow (quantity and speed) of air, to avoid whistling phenomena.

The bypass track 5 is connected to the main conduit 2 in an area whose distance from the main outlet 3 is less than 200 mm.

The diversion track 5 has a longitudinal axis forming with a longitudinal axis of the main conduit 2 an angle between 30 and 60 °, in particular an angle of about 45 °.

According to, the first embodiment of the invention illustrated in Figure 2, the bypass track 5 and the main conduit 2 are connected directly to each other without separation means.

According to the second embodiment of the invention illustrated in Figure 3, the bypass track 5 and the main conduit 2 are connected to each other by a connection zone provided with a valve 7. The valve 7 is articulated between a closed position of the bypass track 5 under the influence of a return spring 8, when the air pressure in the main duct 2 is less than a predetermined threshold value, and a position d opening giving access to the bypass path 5 against the return spring 8 when the air pressure in the main duct 2 is greater than a predetermined threshold value.

The main conduit 2 and the bypass path 5 are made in one piece, for example from injected plastic. In an alternative embodiment not shown, they can be made in two separate parts assembled and connected to each other.

Of course, the invention is not limited to the embodiments or variants described above and includes all the technical equivalents of these means.

Claims (8)

1. Aeration device comprising a fixed structure (1) in which is integrated a main duct (2) for air flow to a main outlet (3) through a plurality of flaps (4) capable directing the air emerging through this outlet, characterized in that it comprises a bypass path (5) connecting the main duct (2) upstream of the main outlet (3) to a secondary outlet (6) distinct from the main outlet (3), shaped to allow evacuation of part of the air flowing in the duct (2), so as to limit pressure losses and overspeeds of air flow evacuating through from the main exit (3). 2. Aeration device according to claim 1, characterized in that the bypass track (5) is connected to the main conduit (2) in a connection zone whose distance from the main outlet (3) is less than 200 mm. 3. Aeration device according to claim 1 or 2, characterized in that the bypass track (5) has a longitudinal axis forming with a longitudinal axis of the main duct (2) an angle between 30 and 60 °, in particular an angle of about 45 °. 4. Aeration device according to any one of the preceding claims, characterized in that the bypass path (5) and the main conduit (2) are connected directly to each other without separation means. 5. Aeration device according to any one of claims 1 to 3, characterized in that the bypass track (5) and the main duct (2) are connected to each other by a zone provided with a valve (7) articulated between a closed position of the bypass track (5) under the influence of a return spring (8), when the air pressure in the main duct (2) is less than a predetermined threshold value, and an open position giving access to the bypass path (5) against the return spring (8) when the air pressure in the main duct (2) is greater than a predetermined threshold value. 5 6. Aeration device according to any one of the preceding claims, characterized in that the main duct (2) and the bypass path (5) are made in one piece, for example made of injected plastic. 7. Dashboard of a motor vehicle, characterized in that it comprises 10 at least one ventilation device according to any one of the preceding claims. 8. Motor vehicle, characterized in that it comprises a dashboard according to claim 7. 1/1