Abstract: The invention concerns a fluid box-manifold assembly for a heat exchanger comprising at least a single-piece housing produced by swaging a sheet metal and including; a cap comprising a base linked to a peripheral wall defining an open surface, and a cover including a base provided with holes for receiving the tube ends of a tube bundle and linked to a peripheral edge matching in shape the cap peripheral wall, the cap and the cover being linked by a material strip forming a bend line, such that the cap and the cover can be mutually brought together up to an interlocking position to define an internal volume of the fluid box. The invention is applicable to motor vehicle heat exchanger.

Abstract: The CO2 refrigerant fluid, compressed by the compressor to a supercritical pressure, is delivered through a three-way valve selectively into a cooler and/or into a bypass branch, so that in the former case, after passing through an expansion device, the fluid is vaporised in an evaporator so as to cool the cabin of the vehicle; while flow of the fluid through the bypass branch avoids the cooler so that the fluid is then cooled in the evaporator, thereby heating the cabin.

Abstract: A device for fixing a motor-fan unit to a heat exchanger comprising an inner support forming a housing for fixing the motor casing of the motor-fan unit and having a lateral opening providing a passage for ancillary equipment of the motor, an outer support surrounding the inner support and adapted to be fixed to the heat exchanger and connecting armatures joining the inner support and the outer support

Abstract: An evaporator consisting of stacked pockets wherein the refrigerating fluid is injected into an upstream connecting duct formed by a sub-assembly of the pockets by a longitudinal tubing which passes through an end face of the evaporator, distant from the upstream connecting duct, and at least another connecting duct formed by other pockets. According to the invention, the tubing is offset with respect to the centers of the openings through which the pockets forming the other connecting duct communicate between them. This results in an improvement in the heat exchange efficiency. The invention is applicable to the air conditioning of the passenger space of automobile vehicles.

Abstract: A motor vehicle heating, ventilating and/or air conditioning installation has air distribution, air mass flow and air temperature functions, each of which is adjustable between several different states. Control of these functions is exercised, by a control device which includes an electronic control module, in response to operation of a single manual control knob by the driver. The control knob acts on the control module when put into a position selected among several positions, each corresponding to one of the functions of the installation. The control member is displaced by tilting within its selected position, so as to act on the control member in such a way as to modify the state of the selected function.

Abstract: An air inlet control device for a ventilating, heating and/or air conditioning system in a motor vehicle comprises a main valve pivotable about a first axis of rotation for selectively closing off a recirculated air inlet and a fresh air inlet, and a pressure adjusting valve, which is also movable pivotally so as to act on the dynamic pressure of the air at the fresh air inlet when the main valve is covering the recirculated air inlet. The pressure adjusting valve has an axis of rotation which is carried by the main valve and which is spaced away from the axis of rotation of the main valve.

Abstract: In a motor vehicle air conditioning apparatus, the fluid flowing in the circuit of the apparatus flows in a bypass branch, bypassing the condenser, in a heating mode of the apparatus. The evaporator then receives the fluid in a gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator can be used for heating the cabin when that produced by the engine of the vehicle is insufficient. A control unit provides special control of the variable capacity of the compressor which is compatible with the heating mode.

Abstract: A motor having radial fastening lugs received damping elements which are adapted to be lodged in matching cavities defined within a housing, with each of the said cavities having open radial and axial faces for enabling the said motor to be introduced or removed axially. The device also includes a retaining member, the shape of which is matched to that of the housing, and which includes at least one engagement surface for supporting each damping element in the region of the open axial face of the cavity in which it is lodged, and removable fastening means between the housing and the retaining member, for axially immobilizing each fastening lug within a cavity. The damping elements include on their outer faces a plurality of grooves which enable the retaining member to be trapped axially by the fastening means and, at the same time, elastic decoupling to be obtained in all directions between the motor and the housing.

Abstract: The pressure of the fluid at the outlet of the compressor is measured by a pressure sensor connected to a control module. When the fluid circulates in a heating loop not comprising a condenser, so as to heat a flow of air by heat exchange in the evaporator, and pressure oscillations indicating the presence of liquid are detected, the momentary opening of a discharge valve is triggered to send a portion of the fluid into the condenser of the air conditioning loop. The presence of liquid is thus detected and eliminated without having recourse to special sensors.

Abstract: A motor vehicle dashboard including a body made of injection-molded plastic form, and at least one air duct integrally molded with the dashboard body. The air duct is produced by means of an at least partially absorbable removable insert, particularly an inflatable balloon.

Abstract: The invention concerns a heating/air conditioning installation for the passenger compartment of a vehicle.It comprises treatment means produced in the form of at least one removable box suitable for being installed underneath the floor of the vehicle and containing an air inlet, an optional evaporator, a heating radiator and at least one air outlet suitable for being connected to distribution vents distributed within the passenger compartment.

Abstract: The heat exchanger has a plurality of stacked individual boxes for defining locally an inlet chamber and an outlet chamber for fluid. The heat exchanger includes an insert that comprises an inlet and outlet opening for fluid extended into the chambers by a body arranged for fluid communication of the opening with the first or second chamber. The insert that comprises a common part the body of which is provided with at least two openings capable of communicating with the first and second chambers, and it comprises a separating member for isolating the fluid currents between the opening and the chamber with which the opening must not communicate, the separating member being selected between two different shapes each corresponding to the fluid communication of the opening with one of the chambers.

Abstract: In the heating mode, the fluid in the air conditioning circuit flows in a bypass branch avoiding the condenser. The evaporator then receives the fluid in the gaseous state and acts as a heat exchanger for dissipating the heat produced in the compressor. The heat dissipated by the evaporator can be used for heating the cabin when that which is produced by the propulsion engine of the vehicle is insufficient.In addition, the fluid pressure at the inlet of the evaporator, and therefor the calorific power produced by the latter, is adjusted by a pressure regulator disposed in the bypass branch.

Abstract: A centrifugal fan for a motor vehicle has a fan rotor driven in rotation by an electric motor and lodged in a central part of a casing. The outer walls of the casing define, in conjunction with a peripheral portion of the rotor, a volute for channeling air which is delivered by the rotor in a tangential direction. The outer wall of the casing includes a longitudinal side wall portion formed with through apertures constituting diversion ports, for taking off some of the air delivered by the rotor and diverting this air through an external duct fixed to the casing and open into the central region of the latter, so as to cool the motor.

Abstract: The air mixing device, for use in an air conditioning apparatus or a vehicle heater system as a flow control device which consists of at least two flap members, the flap members being mutually independently movable between first and second positions in which they respectively obturate first and second air inlet openings.

Abstract: A plate type heat exchanger, which may for example be an evaporator for a motor vehicle air conditioning installation, comprises a stack of hollow plates with a pipe connector interposed in the stack. The flow circuit in which the heat exchanger is inserted includes a fluid flow tube coupled to the pipe connection of the heat exchanger by means of a coupling device which includes a clamping ring. This coupling device includes an intermediate sleeve having a cylindrical portion fitted intimately around a cylindrical end portion of the pipe connection, together with another cylindrical portion which serves in effect as an extension of the cylindrical end portion. The clamping ring is engaged around the outer cylindrical portion of the sleeve, so as to clamp the latter around the end of the fluid flow tube, the latter having previously been introduced into the sleeve and the end portion of the pipe connection.

Abstract: An air conditioning installation for the cabin of a motor vehicle comprises an air treatment and distribution unit having an upstream chamber containing a fan and a downstream chamber containing distribution valves for distribution of treated air to the cabin. The two chambers are separated by an evaporator, through which air is driven by the fan into the downstream chamber. A collector for recovery of condensates is located below the evaporator and drains to outside the vehicle. The installation includes control means arranged to operate an automatic scavenging cycle immediately prior to the start of a period of air conditioning operation. This cycle consists in closing all the distribution valves and then running the fan for a predetermined scavenging period so as to drive the stale air out of the interior of the unit.

Abstract: An apparatus for controlling the flow of a stream of air consists of an independent module that comprises a support structure on which two rollers are mounted for rotation. A film, having open regions and closed regions, is wound between the two rollers, so that when the rollers are rotated to displace the film between the rollers, the relative positions of the open and closed regions of the film gives selective control of the flow of an air stream directed on to the film. The support structure includes a drive mechanism, for driving the rollers in alternate rotary motion and including a synchronizing shaft for synchronizing the rotary motion of the two rollers.

Abstract: The control system includes: a memory for memorizing a table of correspondence between inputs which comprise, on the one hand, sets of parameters and, on the other hand, operational adjustments of the working parts of the installation; an installation interface for instigating such adjustments; and a data unit having touch pads or other manual setting elements operated by the user so as to define a set of desired (or running) parameters. The data unit also has manual programming elements, and the memory includes individual zones for storing a set of parameters, each of these zones being associated with one of the manual programming elements, so that actuation of one of the latter stores the set of running parameters in the associated programming zone as a set of programmed parameters.

Abstract: The apparatus includes a casing, in which a fresh air passage member has an inlet port communicating with a fresh air inlet, and an outlet port open into an outlet chamber, which is fed through a mixing zone and which in its turn supplies a ventilating duct and a heating duct, the passage member containing internal deflecting walls for encouraging mixing of a stream of fresh air with a stream of mixed air at the outlet of the said passage member.