Servo door-closer
A power-assisted door closer includes an output shaft, a driving mechanism operatively connected to the output shaft, a mechanical energy accumulator for storing closing energy for the door leaf and acting upon the driving mechanism, a motor/generator unit operatively connected to the output shaft and an electrical energy accumulator for storing an assisting energy for the door leaf and being electrically connected to the motor/generator unit.
1. A power-assisted door closer ( 1 ), comprising:
an output shaft ( 2 );
a driving mechanism ( 3 ) operatively connected to the output shaft ( 2 );
a mechanical energy accumulator configured to store a closing energy for a door leaf and act upon the driving mechanism ( 3 );
a motor/generator unit ( 5 ) mechanically and directly operatively connected to the output shaft ( 2 ); and
an electrical energy accumulator ( 6 ) configured to store assisting energy for the door leaf, the electrical energy accumulator ( 6 ) being electrically connected to the motor/generator unit ( 5 ),
wherein the motor/generator unit ( 5 ) is configured to assist a manual opening of the door leaf only up to an angular door range between 0 and 45°.
2. The power-assisted door closer according to claim 1 , wherein the mechanical energy accumulator ( 4 ) comprises a closer spring.
3. The power-assisted door closer according to claim 1 , wherein the electrical energy accumulator ( 6 ) comprises an accumulator and/or a capacitor.
4. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to assist a manual opening of the door leaf and a simultaneous tensioning of the mechanical energy accumulator ( 4 ), and/or to assist or to dampen a closing of the door leaf performed by a discharge of the mechanical energy accumulator ( 4 ).
5. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to act as a generator for charging the electrical energy accumulator ( 6 ) during opening and/or closing of the door leaf.
6. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to dampen, while functioning as a generator, a manual opening of the door leaf in the angular door range of up to 30° before the terminal position of the door.
7. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to assist or to dampen, while functioning as a generator, a closing of the door leaf only in the angular door range between 0° and 45°.
8. The power-assisted door closer according to claim 1 , further comprising a position sensor ( 16 ) configured to detect an angle of door rotation directly at the motor/generator unit ( 5 ).
9. The power-assisted door closer according to claim 1 , further comprising a control unit ( 7 ) actuating the motor/generator unit ( 5 ), the control unit ( 7 ) being configured to detect the direction of rotation of the door leaf based on the current and/or the voltage at the motor/generator unit ( 5 ).
10. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to assist a manual opening of the door leaf only between 0 and 30°.
11. The power-assisted door closer according to claim 1 , wherein the motor/generator unit ( 5 ) is configured to assist a manual opening of the door leaf only between 0 and 25°.
12. The power-assisted door closer according to claim 6 , wherein the motor/generator unit ( 5 ) is configured to dampen, while functioning as a generator, a manual opening of the door leaf in the angular door range of up to 20° before the terminal position of the door.
13. The power-assisted door closer according to claim 6 , wherein the motor/generator unit ( 5 ) is configured to dampen, while functioning as a generator, a manual opening of the door leaf in the angular door range of up to 15° before the terminal position of the door.
14. The power-assisted door closer according to claim 7 , wherein the motor/generator unit ( 5 ) is configured to assist or to dampen, while functioning as a generator, a closing of the door leaf only in the angular door range between 0° and 30°.
15. The power-assisted door closer according to claim 7 , wherein the motor/generator unit ( 5 ) is configured to assist or to dampen, while functioning as a generator, a closing of the door leaf only in the angular door range between 0° and 25°.
16. The power-assisted door closer according to claim 1 , wherein the operative connection of the motor/generator unit ( 5 ) to the output shaft is bi-directional.