Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Patent
1996-06-18
1999-08-10
McMahon, Marguerite
Valves and valve actuation
Electrically actuated valve
Rotary electric actuator
B60H 124
Patent
active
059346442
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a setting device for a ventilation flap in an air duct, particularly in a heating and ventilation system of an automobile.
Ventilation flaps are used in the air ducts of heating and ventilation systems or air conditioning systems in an automobile and are usually adjusted via Bowden pull mechanisms or mechanical transmissions.
It is known to adjust the ventilation flaps by an electric motor, a corresponding control unit for the electric motor being arranged in the region of the dashboard. Desired-value transmitters to be adjusted by the user are provided for the rotary angles of the flap in the control unit, the associated electric motor being adjusted according to the desired-value presetting via the electronics.
A plurality of ventilation flaps are arranged in an automobile, and these, as a rule, have different directions of rotation and often also have to be adjusted over different rotary angle ranges. Each electric motor must therefore be actuated in an appropriate way by the control unit.
In the mounting of a plurality of ventilation flaps adjustable in each case by means of electric motors, it is necessary to ensure that the respective control outputs are correctly assigned to the respective electric motors. Although confusion between the junction leads can be recognized during an operating test, there is nevertheless the risk of damage to the ventilation flap or to the electric motor when, for example on account of incorrect assignment, the electric motor is adjusted beyond a permissible rotary angle range.
SUMMARY OF THE INVENTION
The object on which the invention is based is to develop a generic setting device in such a way that, along with easier mounting and high operating reliability, electromechanical adjustment of a ventilation flap is achieved.
The object is achieved, according to the invention, defined herein.
The electric motor designed as a stepping motor is activated by the output pulses from the control unit, each electric motor having adjacent to it a control unit which possesses encoding inputs for the selection of the direction of rotation and/or of the rotary angle. The stepping motor and the control unit are arranged in the region of the ventilation flap, so that the control unit simply has to be connected to a transmitter arranged in the dashboard of the automobile. The stepping motor physically connected to the control unit is designed in the same way, irrespective of its place of use; adaptation to its place of use, that is to say the direction of rotation predetermined for the place of use as well as the rotary angle, is achieved by the occupancy of the encoding inputs. In a heating and ventilation system or air conditioning system, therefore, the same structural units composed of stepping motor and of control unit are always used, so that both an interchange of the motors and a simple replacement of a motor are possible. The input signals predetermining a desired value are fed in analog form to the control unit and are converted by the latter into output pulses which are used in a known way for controlling the stepping motor. These preferably digital pulses bring about the adjustment of the electric motor and consequently a corresponding adjustment of the ventilation flap in individual steps of predeterminable rotary angle.
In a preferred embodiment, the stepping motor and the control unit assigned to it are arranged in a common housing. The control unit is preferably arranged in the housing of the stepping motor.
The junctions of the control unit, that is to say the voltage supply, the desired-value junctions and the encoding junctions, are preferably designed as plug junctions which are, in particular, located behind a housing window of the common housing. A preferably one-part plug can be attached to the plug junctions, which plug is to be introduced in the correct position into the window, for example by means of notches, projections or the like, and, by being plugged on, predetermines the voltage supply, the junction
REFERENCES:
patent: 4154425 (1979-05-01), Smith
patent: 4915074 (1990-04-01), Arai
patent: 4951712 (1990-08-01), Becker
patent: 5100101 (1992-03-01), Shah
patent: 5113824 (1992-05-01), Haubner
patent: 5160115 (1992-11-01), Ito et al.
patent: 5398910 (1995-03-01), Kitazawa
Boillat Pierre
Martin Ralf
Portmann Urs
Richter Christian
Scholz Rudolf
McMahon Marguerite
Saia AG Industrie-Elektronik Und Komponenten Behr GmbH & Co
LandOfFree
Setting device for a ventilation flap does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Setting device for a ventilation flap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Setting device for a ventilation flap will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1111958