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1. WO2007097715 - CONTROLS FOR VENTILATION AND EXHAUST DUCTS AND FANS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

THE CLAIMS

1. A fan assembly for placement in ducting of a ventilation or exhaust system for an environment space, the fan assembly comprising;
(a) a motor having an output shaft;
(b) a fan mounted on the output shaft; and
(c) a brake mounted for operation on the motor;
wherein
(d) the brake is operable for stopping rotation of the motor upon a detection of a prescribed situation one or more of: the environmental space, and the ducting.

2. A fan assembly as claimed in claim 1 , wherein the motor and fan are within a shroud.

3. A fan assembly as claimed in claim 1 or claim 2, wherein the brake comprises a variable speed drive.

4. A fan assembly as claimed in any one of claims 1 to 3, wherein the prescribed situation may be the presence of one or more of: smoke, fumes, gas, heat, noxious fumes, and fire; and the gas included a cooking gas, carbon dioxide or carbon monoxide.

5. A valve assembly for placement in ducting of a ventilation or exhaust system, the vaive assembly comprising:
(a) a valve member for placement in the ducting for movement between a first position where the ducting is substantially open, and a second position where the ducting is substantially closed;
(b) the valve member being adapted to move from the first position to the second position in response to at least one detection of a prescribed situation.

6. A vaive assembly as claimed in claim 5, wherein the valve member is sized and shaped to substantially accord to an interior size and shape of the exhaust ducting.

7. A valve assembly as claimed in claim 5 or claim 6, wherein the prescribed situation may be the presence of one or more of: smoke, fumes, gas, heat, noxious fumes, and fire; and the gas includes a cooking gas, carbon dioxide or carbon monoxide.

8. A ventilation or exhaust system comprising:
(a) ducting;
(b) the fan assembly of any one of claims 1 to 4;
(c) the valve assembly of any one of claims 5 to 7claim 5 or claim 6;
(d) at least one detector for detecting a prescribed situation, the detector being for controlling the operation of the brake of the fan assembly, and the valve assembly, in response to the detecting.

9. A system as claimed in claim 8, wherein the valve assembly is located at, adjacent or near an outiet end of the exhaust ducting.

10. A system as claimed in claim 8 or claim 9 further comprising a control panel comprising a reset contra! for resetting the at least one detector, releasing the brake of the fan assembly, and moving the valve member to the first position.

11. An system as claimed in any one of claims 8 to 10 further comprising at least one sensor for controlling the operation of the fan assembly.

12. A system as claimed in claim 11 , wherein the at least one sensor is at least one selected from the group consisting of: at least one time sensor, at least one heat sensor, at least one temperature sensor, at least one gas sensor, at least one fumes sensor.

13. A system as claimed in any one of claims 8 to 12, wherein there are a plurality of sensors arranged in groups.

14. A system as claimed in claim 13, wherein at least one group of the groups of sensors comprises more than one sensor.

15. A system as claimed in any one of claims 8 to 14, wherein a number of sensors activated determines the fan assembly operational speed.

16, A system as claimed in any one of claims 8 to 15, wherein a stage in a time sensor determines a stage in a time sensor determines the fan assembly operational speed.

17. A ventilation or exhaust apparatus comprising:
(a) a fan assembly as claimed in any one of claims 1 to 4; and
(b) a plurality of sensors for automatically controlling the operation of the fan assembly by controlling the operational speed of the fan assembly in accordance with the number, location or nature of sensors that are activated.

18. Apparatus as claimed in claim 17, wherein the plurality of sensors is at least two selected from the group consisting of: at least one time sensor, at least one heat sensor,. at least one temperature sensor, at least one gas sensor, and at least one fumes sensor.

19. Apparatus s claimed in claim 17 or claim 18 further comprising at least one of:
(a) a master on control for overriding the time sensor;
(b) a master off control for overriding the time sensor; and
(c) time controls for setting a plurality of preset times- for the operation of the time sensor.