Abstract: A magnetically controlled flow system having a pivotable flap with a permanent magnet at distal ends. Two coils with magnetizable cores are mounted inside the duct and positioned so as to cooperate with the permanent magnet when the flap is in either a closed or an open position. By energizing the coils, the permanent magnet is attracted to the magnetizable cores in either one of the coils, thereby actuating the flap between the closed and open positions.

Abstract: A zonal climate control system for a vehicle passenger compartment provides independent outside air mixing for zones behind the operator area. A forward zone climate unit comprises, an air circulation system having an outlet to the vehicle passenger compartment, an inlet from the vehicle passenger compartment, an inlet communicating with an outside environment, a heater core coupled to the engine driven heat source and an evaporator coupled to the engine driven air conditioning compressor. The passenger compartment further includes a rearward zone climate unit, comprising, an air circulation system having an outlet to the vehicle passenger compartment, an inlet from the vehicle passenger compartment, an inlet communicating with the outside environment through the exterior skin of the vehicle, a heater core coupled to the engine driven heat source and an evaporator coupled to the engine driven compressor.

Abstract: A mechanical control head system allows a vehicle user to control certain HVAC functions. The mechanical control head system includes a mounting plate, a faceplate, at least two user-adjustable actuators, at least two function interfaces and connections between the function interfaces and the HVAC module. The knobs provide the user a means to control, for example, the ambient temperature in the vehicle interior and the outside air circulation within the vehicle. The rotary cylinders can be coupled and uncoupled to the knobs in a single step instead of requiring individual steps for each knob.

Abstract: An air conditioning apparatus for an automotive vehicle includes a heater core and a mix door assembly installed in a case. The mix door assembly is detachably installed in the case through an opening formed at a side wall of the case. The mix door assembly constitutes a housing, a mix door and a slide mechanism. The slide mechanism is arranged to slide the mix door according to a received rotational force so as to vary the ratio of warm air to quantity and cool air quantity.

Abstract: The mixing device, for distributing in variable proportions a main air stream (8) flowing through an apparatus for heating and/or air-conditioning the cabin of a motor vehicle between a hot air duct (14) and a cold air duct (18), comprises a perforated panel (40) arranged in the hot duct (14) and a shut-off plate (44) that can move between an open position in which it is spaced away from the perforations (42) in the panel (40) and a shut-off position in which it shuts off the panel, a shutter (50) for adjusting the passage cross section of the cold air duct (18) that can move between an open position and a shut-off position, a control mechanism (54) for controlling, in synchronism, the movement of the shut-off plate (44) and the movement of the shutter (50).

Abstract: A plastic cross car beam for a motor vehicle includes first and second members joined together at sealing points to form at least two ducts. The cross sectional shapes of the ducts are essentially constant along the length of the cross car beam and shaped to provide structural support for various types of loadings. Each duct is provided with at least one inlet, aligned with an HVAC assembly, and one outlet, aligned with a vent or register. Preferably a support member, which is integral with one of the members, extends downward from one of the ducts and supports an HVAC case. Also, preferably, the support member is provided with a pocket for receiving an energy absorbing bracket.

Abstract: In an air passage switching door, a packing material having a size approximately corresponding to a plate surface of a door base member is used, and the door base member is crossed with the packing material at a, portion around a rotation shaft for rotating the door base member, so that both plate portions of the door base member are bonded to opposite surfaces of the packing material at different areas of the packing material. Accordingly, the air passage switching door can be manufactured using the single packing material in low cost, while having a reduced thickness.

Abstract: An air flow control arrangement is constructed with an air feed into an interior of a motor vehicle. Vertical and horizontal air guiding vanes are swivelably arranged in a housing, and controllable by way of an adjusting device. The housing can be fastened in an opening of a column paneling. The housing has a vertically aligned air guiding duct that includes a first lower duct section with an adjusting flap which can be swiveled about a bearing axis into a horizontal closed position, a vertical open position and intermediate positions, and a second adjoining upper duct section with the integrated air guiding vanes. The adjusting flap can be operated by means of the operating element via a reversing bow which is connected with a crank of the flap and can be swiveled at the housing in a bearing. The housing is fastened by detent hooks which can be snapped onto edges of the column paneling. Furthermore, a retaining spring fastens the head side of the housing.

Abstract: In an air passage switching door, a packing material having a size approximately corresponding to a plate surface of a door base member is used, and the door base member is crossed with the packing material at a portion around a rotation shaft for rotating the door base member, so that both plate portions of the door base member are bonded to opposite surfaces of the packing material at different areas of the packing material. Accordingly, the air passage switching door can be manufactured using the single packing material in low cost, while having a reduced thickness.

Abstract: A distributor box for a heating, ventilating and/or air conditioning apparatus for a passenger compartment of a motor vehicle, comprises an air inlet for admitting a heated airflow and/or a cold airflow into the distributor box therethrough, a plurality of air outlets for leading the airflow to different zones of the passenger compartment, and at least one distributor valve pivotally mounted within the distributor box for pivoting movement between a plurality of positions whereby to distribute said airflow between the plurality of outlets. The distributor valve is provided with vane members on at least one face surface thereof for guiding the airflow from the air inlet toward at least one of the air outlets. The vane member is integrally formed on the distributor valve.

Abstract: In a vehicle air conditioner having an actuator for driving an air mixing door and mode switching doors, an automatic range and a manual range are set in different operation angle ranges of an operation angle of the actuator. In the automatic range, an air outlet mode is automatically switched in accordance with an opening degree of the air mixing door. On the other hand, in the manual range, a multi-mode or a defroster mode is manually set, regardless of the opening degree of the air mixing door. In the manual range, air is simultaneously blown from all openings such as a face opening, a foot opening and a defroster opening in the multi-mode, and air is blown from the defroster opening in the defroster mode.

Abstract: A casing 21 of an automotive air conditioner is formed with a hole TH for accommodating a steering member S extending in a right-left direction of a vehicle. The hole TH extends through the casing 1 in the right-left direction of the vehicle.

Abstract: Disclosed is a component in a hybrid construction, in particular a cross member for arranging between A-pillars of a motor vehicle, having a shell-shaped base body which is stiffened by plastic reinforcing ribs and in which at least one duct is provided. In order to be able to integrate a duct in an advantageous manner, it is proposed that the duct is formed at least in some areas from a plastic shell which is injected together with the reinforcing ribs, extends in the longitudinal direction of the component and can be closed by means of a cover so as to form the duct. The component according to the invention is used as a dashboard support in a motor vehicle.

Abstract: A low-cost vehicle air-conditioning apparatus for idle stopping vehicles is capable of performing both cooling and heating operations throughout the year. The air-conditioning apparatus includes an engine-driven compressor and engine-driven pump for a heating unit. The air-conditioning apparatus includes a motor-driven compressor and pump. A control unit drives the motor such that the motor-driven compressor is operated when there is a need for cooling and the motor-driven pump is operated when there is a need for heating when the engine is stopped. Battery power is conserved through various methods.

Abstract: An actuator for car air duct damper which allows a precise control on the flow of the air. The actuator invention includes a rotary wheel (30) provided on and coaxial to the rotation shaft (54) of the damper (53), said rotary wheel being formed with a plurality of holes (33) along its circumference at a predetermined interval, optical sensors (40) disposed at the both side of the rotary wheel (30) closely so as to correspond to the holes (33), said optical sensors detecting the passage of the light through the holes (33), and a control section connected respectively to the optical sensors (40 ) and input button (63) in the indoor space of a car for controlling the driving motor (10) in accordance with respective input signals.

Abstract: A heating or air-conditioning system for a vehicle occupant compartment has an air distributor with a warm-air outlet which is connected with an air duct leading to a center plane the vehicle occupant compartment. A cold-air bypass controlled by a cold-air flap is provided for lowering the temperature of the warm air flowing out of the warm air outlet to the air duct. In the cold-air bypass, which has a relatively small cross-section, a throttling element is coupled with the cold-air flap such that the cold-air flap partially, to a defined extent, covers the warm-air outlet in the open position of the cold-air flap, thus maximally opening up the cold-air bypass. In addition, in this arrangement the throttling element completely opens up the warm-air outlet in the closed position of the cold-air flap, thus completely blocking the cold-air bypass.

Abstract: An outflow element for motor vehicles has a frame defining an outflow opening and at least one guide element mounted on the frame for guiding air exiting through the outflow opening. The at least one guide element has at least one illuminated display which displays differently as a function of the temperature of the air exiting through said outflow opening. The display is part of a light guide provided on the at least one guide element and is illuminated by light sources of different colors.

Abstract: An air conditioning unit including a box having an intake switching damper for selectively opening an outside air inlet and an inside air inlet to receive introduced air. The air conditioning unit further including a blower unit configured to draw in the introduced air and blow the introduced air to a downstream side, and an air regulating unit. The air regulating unit has a unit case with an evaporator configured to exchange heat between the introduced air and a refrigerant, a heater core configured to exchange heat between the introduced air and a warm fluid, and an air mix damper for adjusting a flow quantity of the introduced air that passes through the heater core. The unit case has a defroster damper for a defroster air outlet configured to discharge toward a glass surface a two-layer flow of air-conditioned air comprising a warm layer and a cold layer.

Abstract: An air conditioning unit for a vehicle has a unit case enclosing a blower fan, a cooling heat exchanger (evaporator) and a heating heat exchanger (heater core), and defining therein an air conditioning passage for conveying air from the blower fan through the cooling heat exchanger and the heating heat exchanger, to an upper outlet opening. The air conditioning passage has an upstream passage section extending downward on a first side of the blower fan to convey the air from the blower fan downward, an intermediate passage section extending under the blower fan in a first direction from the first side to a second side of the blower fan, and a downstream passage section extending upward on the second side of the blower fan to the upper outlet opening for directing the air over the blower fan in a second direction, opposite to the first direction, from the second side toward the first side (toward the passenger compartment of the vehicle).

Abstract: A heating/air-conditioning device suitable for housing in a vehicle instrument panel includes an evaporator, a heating radiator, an air-distribution means with first and second deflector means, and a blower. The blower sends an airflow through the evaporator and the heating radiator. The evaporator has a principal surface in a first principal plane and the heating radiator has a principal surface in a second principal plane. The evaporator is traversed by the airflow in a first direction substantially perpendicular to the first principal plane. The first deflector means then divert the airflow into a second direction substantially perpendicular to the second principal plane with part of the airflow passing through the heating radiator. The second deflector means then diverts the airflow into a direction substantially parallel to the second principal plane. The air-distribution means diffuses the airflow into a passenger compartment of the vehicle.

Abstract: An air conditioner unit comprises a case having a plurality of air passages defined therein; two pivotal mode doors pivotally arranged in the case to provide various operation modes of the air conditioner unit when assuming given angular positions, each of the mode doors having a pivot shaft of which leading end is exposed to the outside from a wall of the case; and a mode door actuating mechanism attached to an outer surface of the wall of the case to actuate the two pivotal mode doors.

Abstract: In a vehicle air conditioner, an air conditioning case has a first front foot air outlet from which air is blown toward a front-seat foot area of a passenger compartment, and a rear foot passage for introducing air toward a rear-seat foot area of the passenger compartment. A rear foot air outlet is provided at a most downstream end of the rear foot passage, and a second front foot air outlet from which air is blown toward the front-seat foot area is provided in the rear foot passage at a position adjacent to the first front foot air outlet. Thus, a ratio between an air amount blown toward the front-seat foot area and an air amount blown toward the rear-seat foot area is readily adjusted by changing an opening area of the second foot air outlet.

Abstract: A sealing member 11 made of an elastic material secured to the outer peripheral edge of a door plate 10 is provided with support portions 11a and 11b that extend in a direction to intersect the door plate 10, and the support portions 11a and 11b are directly supported by the outer peripheral edge of the door plate 10. Sealing portions 11c and 11d pressed onto a sealing surface 12a of an air passage casing 12 are so formed as to be directed toward the central portion of the door from the support portions 11a and 11b, and the sealing member 11 is folded, in cross-section, from the outer peripheral edge of the door plate 10 toward the central portion of the door due to the support portions 11a and 11b and the sealing portions 11c and 11d.

Abstract: The invention relates to an actuator for car air duct damper which allows a precise control on the flow of the air and has an improved ability.

Abstract: In a vehicle air conditioner having manually operated operation members of an air-conditioning operation panel, rotation shafts of an air mixing door and a mode switching rotary door are disposed in a vehicle front-rear direction, so that an axial direction of the rotation shafts of the doors is made the same as that of rotation shafts of the operation members of the air-conditioning operation panel. Accordingly, operation force of the operation members can be directly transmitted to the rotation shafts of the doors by a simple structure.

Abstract: In a vehicle air-conditioning system, plural electrical members such as a blower controller, servomotors and a post-evaporator temperature sensor are collectively disposed on an electrical circuit board integrally formed with an evaporator case cover for closing a side surface of an evaporator case. Therefore, a wire structure of an electrical connection or a wire harness can be made simple. Further, because an elastically deformable sensor-pressing portion for pressing the post-evaporator sensor toward an evaporator side surface is integrally formed with the evaporator case cover integrated with the electrical circuit board, a contact pressure of a temperature sensitive portion of the post-evaporator sensor onto the evaporator side surface can be maintained.

Abstract: To provide a cockpit module structure for a vehicle where large foot space and a secure and stable supported state can be secured, the body of an air conditioning unit inside which heat exchangers and opening and closing doors are installed is penetrated by a steering member.

Abstract: An air conditioning unit having an indoor section and an outdoor section separated by a dividing wall. The outdoor heat exchanger and fan are enclosed within a housing that is split into a stationary lower wall section and a removable upper wall section which, when removed, provides ready access to the outdoor heat exchanger. A hole is placed in the bottom of the lower wall section in front of the fan so that condensate can be drawn into the unit by the fan and distributed over the heat exchanger surfaces. Vanes are placed on the inside wall of the housing to enhance the distribution of the condensate.

Abstract: The invention relates to a mechanical control device (10) making it possible to act on control members of an airflow-distribution system (1) for a motor vehicle, characterized in that it comprises at least two separate control means (30, 40) with rotary movement acting respectively independently with respect to one another on the control members, a first control means (30) being mounted turning about a first rotational axis and carrying a second control means (40) mounted turning about a second rotational axis which is inclined with respect to the first rotational axis.

Abstract: In a heat exchanger including an evaporator, a blower, an air inlet unit and an air outlet unit, air is fed from outside into the inner part of the heat exchanger through the air inlet unit and then the air flows toward the blower through a first predetermined portion of the evaporator to thereby supply first heat-exchanged air and thereafter, the first heat-exchanged air is fed to the air outlet unit through a second predetermined portion of the evaporator by the blowing operation of the blower to thereby supply second heat-exchanged air.

Abstract: The invention relates to a heating, ventilation and/or air conditioning apparatus that includes a control device and a flap controlled by the control device. The control device includes a control member and a kinematic control linkage of the direct-coupling type arranged between the control member and the flap. The kinematic linkage includes a cable fixed close to its ends and at least one elastic element arranged in such a way as to confer deformability by flexing the kinematic linkage when the flap is at an end stop position. The provided flexibility makes it possible to dispense with the setting-up of the control device and reduces the spring effect in the kinematic linkage.

Abstract: In an air passage switching door, a packing material having a size approximately corresponding to a plate surface of a door base member is used, and the door base member is crossed with the packing material at a portion around a rotation shaft for rotating the door base member, so that both plate portions of the door base member are bonded to opposite surfaces of the packing material at different areas of the packing material. Accordingly, the air passage switching door can be manufactured using the single packing material in low cost, while having a reduced thickness.

Abstract: An air conditioner unit comprises a case having a plurality of air passages defined therein; two pivotal mode doors pivotally arranged in the case to provide various operation modes of the air conditioner unit when assuming given angular positions, each of the mode doors having a pivot shaft of which leading end is exposed to the outside from a wall of the case; and a mode door actuating mechanism attached to an outer surface of the wall of the case to actuate the two pivotal mode doors.

Abstract: A sealing member 11 made of an elastic material secured to the outer peripheral edge of a door plate 10 is provided with support portions 11a and 11b that extend in a direction to intersect the door plate 10, and the support portions 11a and 11b are directly supported by the outer peripheral edge of the door plate 10. Sealing portions 11c and 11d pressed onto a sealing surface 12a of an air passage casing 12 are so formed as to be directed toward the central portion of the door from the support portions 11a and 11b, and the sealing member 11 is folded, in cross-section, from the outer peripheral edge of the door plate 10 toward the central portion of the door due to the support portions 11a and 11b and the sealing portions 11c and 11d.

Abstract: The invention relates to a control unit for a ventilation arrangement in a vehicle. The control unit is designed to indicate and initiate supply of an air flow to at least three intake air regions in the vehicle, which regions may include a defroster region, a panel region and a floor region. The control unit incorporates a first control device (1) designed to indicate and initiate a supply of air flow to the three intake air regions by a first intake air distribution which in each control position caters for at most two of the intake air regions. The control unit also incorporates a second control device (2) designed to indicate and initiate supply of the air flow to the three intake air regions by a second intake air distribution which in each control position caters for at most two of the intake air regions. The result is that the intake air can be distributed variably between the three intake air regions.

Abstract: The invention concerns an air conduit for motor vehicle instrument panel made in the form of an open conduit with a longitudinal slot defined by two fusion faces, the open conduit being produced in one single piece with the instrument panel by moulding a ductile material enabling the stripping by widening the longitudinal slot, means for joint being provided by joining the fusion faces of the longitudinal slop after stripping.

Abstract: An apparatus (10) includes a manually rotatable input member (15), an input gear (20), an output gear (40), a drive link (60), a first planar link (80), and a second planar link (90). The input gear (20) is operatively connected to the input member (15) to rotate with the input member (15). The input gear (20) includes a smooth portion (26, 28) and a toothed portion (22, 24). The output gear (40) has teeth (42, 43) which are operatively engageable with the toothed portion (22, 24) of the input gear (20) such that the toothed portion (22, 24) of the input gear (20) imparts rotation to the output gear (40). The smooth portion (22, 24) of the input gear (20) allows rotation of the input member (15) without imparting rotation to the output gear (40). The drive link (60) is connected to the output gear (40) such that rotation of the output gear (40) imparts rotation to the drive link (60). The drive link (60) has an engagement pin (62) which is rotatable with the drive link (60).

Abstract: An air passage switching system includes a case forming an air passage having an opening portion, and a butterfly door for opening and closing the opening. The door includes a door body portion made of a material having a high rigidity, and a seal member attached to the door body. The seal member is made of an elastic material, and is formed into a thin-plate shape to extend from an outer peripheral portion of the door body portion toward an outer side. The seal member of the door is press-fitted to a case seal surface around the opening portion along a seal line (D), so that the opening portion is closed. The door is set in such a manner that an inner peripheral curvature radius (RC2) of a corner portion of the case seal surface on the seal line is larger than an outer peripheral curvature radius (RD) of the seal member on the corner portion. Thus, the air passage switching system prevents air leak due to a deformation of the seal member while being produced in low cost.

Abstract: Actuation means for actuating a structural part in an automobile, particuarly a flap for a fan, wherein the part is pivotally supported about an axis, comprising a pull wire a power transfer component connected to the pull wire and the structural part, and a damper coupled to the power transfer component or the structural part, with the power transfer component including a resilient portion such that upon exerting tension on the power transfer component the resilient portion is deformed until a force is transferred to the structural part or the damper element, respectively.

Abstract: The present invention relates to an apparatus for controlling the supply of intake air to a vehicle, incorporating a control unit which is arranged to indicate and initiate supply of intake air to at least three intake air regions in the vehicle which usually comprise a defroster region, a panel region and a floor region. The apparatus incorporates a control arrangement which is designed, depending on the setting of the control unit, to control dampers (15 A-C) which are situated in ducts which lead to the intake air regions. The control arrangement incorporates a cam arrangement designed to act upon an arm (14 A-C), arranged for each inlet air region, for variable setting of at least one of the dampers (15 A-C) between an open and a closed position.

Abstract: In constituting an air conditioner case by bonding a first case member having a cooling air intake chamber and a second case member that is not provided with a cooling air intake chamber, the cooling air intake chamber is formed in a direction that is perpendicular to an air intake port and a blower mounting hole, opening via an opening portion. A mounting plate provided with a regulator is mounted at the opening portion. Thus, since a partitioning wall and barrier walls defining the periphery of the cooling air intake chamber can be formed at the same time as the formation of the case main body of the first case member, it is not necessary to further divide the first case member.

Abstract: An air passage switching system includes a case forming an air passage, and a butterfly door for opening and closing the air passage. The door includes a door body, a rotation shaft for rotating the door body, and a seal member attached to the door body. A link member is connected to a first end of the rotation shaft, and the first end of the rotation shaft is rotatably held in a shaft receiving portion of the case through the link member. A first cylindrical portion is formed in the door body concentrically with the rotation shaft at an outer peripheral side of the first end, and a second cylindrical portion protruding to a side of the door body is formed in the case. The first cylindrical portion and the second cylindrical portion are engaged so that a small gap is formed between an outer peripheral surface of the second cylindrical portion, and an inner peripheral surface of the first cylindrical portion and an end of the seal member.

Abstract: An air handling system includes at least two doors to control the flow of air to achieve a selected mode. A first door travels through a first path, and a second door travels through a second path which intersects the first path. A first final position is determined for the first door and a second final position is determined for the second door to achieve the selected mode. It is determined whether the two doors will collide when traveling to the respective final door positions and it is determined whether both doors could be closed simultaneously while rotating to the final positions. A relief door is maintained at a partially open position.

Abstract: A closure device for a closure flap, has an actuating element which is remote from the closure flap. A connecting rod is articulated pivotably on the closure flap and the actuating element to transmit tensile and compressive forces. The connecting rod is assigned to a position element, which is stationary with respect to the mounting of the closure flap, and is provided, at least in the region of the position element, with at least one spring element which acts transversely with respect to the longitudinal extent of said connecting rod. This spring element allows the connecting rod to be moved, by way of contact with the position element, into defined longitudinal positions with associated positions of the closure flap and actuating element. The connecting rod is preferably a spring wire incorporating a shaped spring element.

Abstract: In constituting an air conditioner case by bonding a first case member having a cooling air intake chamber and a second case member that is not provided with a cooling air intake chamber, the cooling air intake chamber is formed in a direction that is perpendicular to an air intake port and a blower mounting hole, opening via an opening portion. A mounting plate provided with a regulator is mounted at the opening portion. Thus, since a partitioning wall and barrier walls defining the periphery of the cooling air intake chamber can be formed at the same time as the formation of the case main body of the first case member, it is not necessary to further divide the first case member.

Abstract: The cylindrical end of the shaft of a rotating valve door in an automotive HVAC case is closely supported without either excessive clearance or binding, accommodating expected tolerance variations in the final, assembled location of the shaft end. The expected tolerance range is divided up into components along, and perpendicular to, the direction in which two housings of the case are assembled. One slot is cut into one housing along the direction of assembly, and another perpendicular thereto. When the housings are assembled, the two slots cross one another, capturing the shaft end closely on all four sides between the two pairs of slots. The closed ends of the slots have enough clearance from the nominal location of the shaft end to let the shaft end float to its final location without binding.

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: An apparatus for cooling electrical components contained inside an enclosed housing, which is positioned proximate to a dashboard of a vehicle, includes an inlet pipe which receives a forced air flow and an outlet pipe which expels air from the enclosed housing. The inlet pipe receives the forced air flow either from a fan or from an air intake mechanism which supplies filtered air to an intake manifold of the vehicle engine. The air intake mechanism also maintains the temperature of the vehicle battery at a predetermined temperature by use of heated air from the engine exhaust manifold.

Abstract: A blower unit for an automobile air conditioner includes a centrifugal fan having a suction port for sucking outside air, and a motor for rotating the fan. The motor is disposed approximately horizontally to penetrate through the suction port of the fan. One end of the fan in an axial direction is connected to a rotation shaft of the motor by a connection member, and a water-prevention member is disposed on an outer peripheral surface of the motor at an inner peripheral side of the one end of the fan in the axial direction. The water-prevention member prevents water dropped onto the outer peripheral surface of the motor from moving to a side of the connection member. Further, the water-prevention member includes a groove portion for receiving water dropped from the one end of the fan along the connection member. Thus, in the blower unit, the water-prevention member prevents water from flowing into the motor.

Abstract: An air flow control device is of the film obturator type, and is in the form of an independent module comprising a support frame on which two rollers are mounted for rotation. A film or blind, having open regions and closed regions for selectively controlling the flow of a stream of air, is wound on the rollers. The support frame comprises a guide frame which lies between the two rollers, for guiding the film and for contact with the film; and a press frame is arranged in facing relationship with the guide frame. The press frame carries springs for pressing the film against the guide frame.