FR2718682A1 - Air conditioning installation with improved control for a motor vehicle. - Google Patents

Abstract

The invention proposes an air conditioning installation for the passenger compartment of a motor vehicle, of the type comprising heating means for heating an air stream, cooling means for cooling an air stream, recirculation means for circulate air in contact with the heating means and / or with the cooling means, two aerators (36, 38) to introduce into the passenger compartment air circulating under the action of the circulation means and the if necessary heated and / or cooled, a first aerator (38) being provided, for the adjustment of the air flow which passes through it, with a movable element (80) mounted to pivot on a support arranged in the passenger compartment, between a minimum opening position and a maximum opening position, characterized in that a first flap (92) integral in rotation with the movable element (80) closes the second aerator (36), when the movable element (80 ) is in the minimum open position.

Description

The present invention relates to an air conditioning installation

  improved control for a motor vehicle. Already known in the prior art an air conditioning installation of the passenger compartment of a motor vehicle, of the type comprising heating means

  to heat a stream of air, cooling means

  to cool an air stream, circulation means for circulating the air in contact with the

  heating means and / or with cooling means

  ment, two aerators for introducing into the passenger compartment air circulating under the action of the circulation means and if necessary heated and / or cooled, a first aerator being provided, for adjusting the air flow rate which passes through it , of a movable element pivotally mounted on a support arranged in the passenger compartment, between a position

  minimum opening and maximum opening position.

  The object of the invention is in particular to optimize the

  distribution of heated or cooled air in the passenger compartment.

  To this end, the subject of the invention is an installation

  tion of air conditioning of the passenger compartment of a motor vehicle, of the aforementioned type, characterized in that a first component integral in rotation with the movable element closes the second aerator, when the movable element is in

minimum opening position.

  According to other characteristics of the invention: - the movable element controls temperature adjustment means acting on the heating and / or cooling and / or circulation means to adjust the temperature of the air reaching the aerators , so that the air is heated and cooled in the minimum and maximum opening positions respectively - the support consists of a dashboard, the first aerator being arranged in the front position of the dashboard and the second aerator being disposed in the upper part of this dashboard, near the pivot axis of the movable element; - The first component is secured to the articulated end of the movable element; - A second flap is integral in rotation with the movable element closes an opening communicating the aerators with air supply means of the heating means, when the movable element is in the minimum open position; - the second flap is integral with the end

  opposite the hinged end of the movable member.

  Other characteristics and advantages of the invention

  tion will appear on reading the detailed description

  which follows for the understanding of which reference will be made to the appended drawings in which: - Figure 1 is a schematic partial view in longitudinal section of a motor vehicle, equipped with an installation according to the invention; - Figure 2 is a schematic representation of the installation of Figure 1; - Figures 3 and 4 are partial views, in

  longitudinal section, showing a first embodiment

  tion of the mobile element of the aerator in its minimum and maximum opening positions respectively; and - Figures 5 and 6 are views similar to Figures 3 and 4 showing a second embodiment of

the moving part of the aerator.

  In Figure 1, there is shown an installation according to the invention for air conditioning the passenger compartment of a motor vehicle, designated by the reference

general 10.

  In the example described, the vehicle is of the “one-piece” type, the windshield P of this vehicle being strongly inclined in the extension of the engine hood C. The installation 10 comprises elements disposed on both sides of a transverse partition 12 separating the passenger compartment H from the front engine compartment M of the vehicle. The elements of the installation 10 arranged in the engine compartment M include an air intake member 14 provided with an inlet 16 for air (arrow F1) taken from outside the vehicle and an inlet 18 for recirculated air (arrow F2) coming from the passenger compartment H. The inlet 16 is connected to a separator 20 intended for

  separate rainwater from outside air,

  below the windshield P. The air intake member 14 comprises a pivoting flap 22 movable between a position for closing the inlet 18 (shown in solid lines in FIG. 1) and a position for closing the 'entry 16 (shown

  in broken lines in Figure 1).

  The air intake member 14 also comprises a dust filter 24 making it possible to obtain a flow of external air or recirculated and filtered, this flow of air then being sent, through a passage of the partition 12, towards the elements of the installation 10 which are arranged on the side of the passenger compartment H. These elements are placed in line on the longitudinal axis XX of the vehicle and are housed in a central module of the dashboard B. The elements of the installation 10 internal to the passenger compartment include a heating device 26 for the production of hot air and a ventilation arrangement

  28 for the production of cold or conditioned air.

  The heating device 26 is arranged in the part of the dashboard close to the front of the vehicle, and the ventilation device 28 is arranged in the part of the dashboard close to the rear of the vehicle. The filtered air from the intake device 14 first passes through the heating device 26 and then reaches the

ventilation 28.

  The heating device 26 is connected to at least one defrosting / defogging mouth 30 of the windshield P to direct an air flow (arrow F3) towards the windshield, to at least one lateral mouth 32 suitable for sending a air flow (arrow F4) towards a side window of the vehicle, and at least one mouth 34 adapted to direct an air flow

  (arrow F5) towards the lower part of the passenger compartment.

  The ventilation device 28 is connected to at least one mouth 36 placed in the upper part of the dashboard B and to at least one aerator 38 placed in the front part of the dashboard B. With reference to FIGS. 1 and 2, it can be seen that the heating device 26 comprises a set of electric heating radiators 40 comprising three successive electric radiators 40-1, 40-2 and 40-3 having for example respective powers of 600 W 1000 W and 1000 W. in a variant , the radiator assembly could include a radiator through which the engine coolant flows. It could also be envisaged to combine both an electric heater and

  a coolant circulation radiator.

  The heating device 26 further comprises a heating unit 42 comprising an axial inlet 44 for the air coming from the intake member 14 and optionally heated by the radiator 40. The housing 42 also comprises outlets 46, 48 The outputs 46 are connected to the outlets 30 and 32, while the output 48

is connected to the mouth 34.

  The housing 42 receives a blower 52 carrying a turbine 54 driven by a motor 56, the common axis of

  rotation of the motor and the turbine being the axis X-X.

  The ventilation device comprises a housing 58 comprising an axial inlet 60 connected to inlets, 50 ′ of the housing 42 and an axial outlet 62. In the

  housing 58 is housed a ventilation blower 64 comprising

  both a propeller 66 driven by a motor 68 whose axis of rotation is coaxial with that of the motor 56, and with the axis X-X. A diffusion box 70 in which is housed a

  evaporator 72 is mounted on outlet 62 of housing 58.

  The housings 42, 58 and 70 are mounted coaxially and thus constitute a compact module arranged in a central position in the dashboard B. In FIGS. 2 and 3, a first embodiment of an aerator 38 is shown according to the invention. This aerator 38 comprises an opening 76 formed in the front wall 78 of the dashboard facing the occupants of the passenger compartment, and a movable element 80 pivotally mounted on the upper edge of the opening 76, by means of a pin. 82 with a horizontal axis parallel to this edge. The movable element 80 can be moved between a minimum opening position of the aerator 38, as shown in FIG. 3, and a maximum opening position of the aerator 38, as shown in FIG.

figure 4.

  The movable element 80 comprises a perforated front part forming a grid 84 which, in the position illustrated in FIG. 3, substantially matches the profile of the wall

  78 so as to cover the opening 76.

  The lower edge of the grid 84 opposite the spindle 82 is extended, by means of a gripping spout 86, by a lower wall 87 which, considering the position illustrated in FIG. 3, protrudes inside. of the housing 58 through the opening 76. The left and right lateral edges of the grid 84 and of the lower edge 87 are extended by two lateral walls forming cheeks 88 in the general shape of

triangle with rounded angles.

  Still referring to FIGS. 3 and 4, it can be seen that the aerator 36 has an opening 90 formed in the upper wall of the dashboard B, at

  proximity of the pivoting axis of the movable element 80.

  A flap 92 integral in rotation with the movable element 80 closes this opening 90, when the movable element is in the minimum open position such that

shown in Figure 3.

  Preferably, the flap 90 has one end crossed by the pin 82, integral with the end

articulated of the movable element.

  Preferably, the movable element 80 controls means for adjusting the temperature acting on the heating device 26 and / or the heating device.

  ventilation 28, in particular on the means of circulation

  tion of these devices, and / or a compressor, not shown in the figures, ensuring the circulation of a coolant in the evaporator 72, so that the air is heated and cooled in the positions

  minimum and maximum opening respectively.

  The movable element 80 also comprises electrical contact members, not shown in the figures, intended to cooperate with contact members integral with the dashboard B to establish and interrupt, during the pivoting of the movable element, electrical connections for the control of different

  components of the air conditioning system 10.

  Preferably, the mobile element controls the intake flap 22, the blowers 52 and 64 and the compressor,

as follows.

  When the aerator 38 is in its minimum open position, as shown in FIG. 3, the flap 22 is arranged so as to admit exclusively outside air, the heating fan 52 rotates at its maximum speed, the ventilation blower 64 is stopped as well as the compressor. The aerator 36 is closed by the flap 92. Heated air therefore enters the passenger compartment

  by the aerator 38, at a reduced rate.

  When the movable member 80 is pulled in the opening direction, the flap 22 remains in its initial position, the speed of the blower 52 decreases progressively and that of the blower 64 increases progressively and the compressor remains stopped. The shutter 92 opens according to

  the pivoting angle of the movable member 80.

  Aerators 36 and 38 thus send into the habiti-

  tackles an increasing flow of air which is less and less

  heated to finally become ventilation air.

  When the aerator 38 is in its maximum open position, as shown in FIG. 3, the flap 22, driven by a micro-motor not shown, comes to occupy its position ensuring the exclusive admission of recirculated air, the Pulser 52 is stopped and Pulser 64 rotates at its maximum speed, and the compressor is in service. Aerators 36 and 38 then provide a flow

maximum air conditioning.

  The air conditioning installation 10 may also include known thermostatic means temporarily interrupting the operation of the compressor when the temperature in the passenger compartment drops below a

  preset value, under the effect of air conditioning.

  The all-or-nothing compressor usually used in existing air conditioning systems can be replaced by means allowing the evaporator to extract air at an adjustable heat output, for example a variable power compressor. These adjustment means can be used to provide air conditioning with progressive efficiency over a fraction of the travel of the movable element, this efficiency being maximum for the full position.

opening of aerators.

  Figures 5 and 6 show a second

  embodiment of an aerator 38 according to the invention.

  In this case, an additional flap 94 integral in rotation with the movable element 80 closes an opening 96 communicating the aerators 36, 38 with air supply means for the heating device 26, when the movable element is in position opening

  minimum as shown in Figure 5.

  The additional flap 94 forms for example an extension of the bottom wall 87 of the movable element 80. The movable element 80 controls means for adjusting the temperature of the air reaching the aerators 36, 38

  so as to allow the operation described previously

is lying.

  Thus, when the movable element 80 is in the minimum open position as shown in FIG. 5, all the air flow put into circulation passes through the

heater 26.

  When the movable element 80 is in its maximum open position as shown in FIG. 5, cold air or a mixture of cold air and hot air

  can pass through the aerators 36, 38.

Claims (6)

  1. Installation for air conditioning the passenger compartment (H) of a motor vehicle, of the type comprising heating means (40) for heating a stream of air, cooling means (72) for cooling a stream of air , recirculation means (14, 52, 64) for circulating air in contact with the heating means and / or with the cooling means, two aerators (36, 38) for introducing into the passenger compartment air circulating under the action of the circulation means and if necessary heated and / or cooled, a first aerator (38) being provided, for the adjustment of the air flow which passes through it, with a mobile element (80) pivotally mounted on a support disposed in the passenger compartment (H), between a minimum open position and a maximum open position, characterized in that a first flap (92) integral in rotation with the movable element (80 ) closes the second aerator (36), when the movable element (80) is in minimum opening position.   2. Installation according to claim 1, character-   in that the movable element (80) controls temperature adjustment means acting on the heating and / or cooling and / or circulation means to adjust the temperature of the air reaching the aerators (36, 38) , so that the air is heated and cooled to the minimum open positions and maximum respectively.   3. Installation according to claim 1 or 2, characterized in that the support consists of a dashboard (B), the first aerator (38) being disposed in the front part of the dashboard and the second aerator being arranged in upper part of this dashboard, near the pivot axis of the movable element (80). 4. Installation according to any one of   previous claims, characterized in that the   first flap (92) is integral with the articulated end of the movable element (80).   5. Installation according to any one of   previous claims, characterized in that a   second flap (94) integral in rotation with the movable element (80) closes an opening (96) communicating the aerators (36, 38) with air supply means of the heating means (26), when the moving element   (80) is in the minimum open position.   6. Installation according to claim 5, character-   in that the second flap (94) is integral with the end opposite the articulated end of the element mobile (80).