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1. AU2007218220 - Controls for ventilation and exhaust ducts and fans

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[ EN ]
THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1.           A ventilation or exhaust apparatus comprising:
(a) a fan assembly comprising:
i. a motor having an output shaft;
ii. a fan mounted on the output shaft;
iii. a variable speed drive including an electric brake component that operates electrically to stop the motor upon a detection of a prescribed situation in one or more of: the environmental space, and the ducting; and
(b) at least one sensor for controlling the operation of the fan assembly.
2.           The apparatus as claimed in claim 1, 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, and at least one fumes sensor.
3.           The apparatus as claimed in claim 2 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;
(c) time controls for setting a plurality of preset times for the operation of the time sensor.
4.            The apparatus as claimed in any one of claims I to 3 further comprising a valve assembly for placement in ducting of a ventilation or exhaust system, the valve 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 to at least one detection of the prescribed situation;
(c) the valve assembly being for location at, adjacent or near an outlet end of the ducting.
5. The apparatus as claimed in claim 4, wherein the valve member is sized and shaped to substantially accord to an interior size and shape of the ducting, and at least one of a plurality of sensors is for providing the at least one detection of the prescribed situation; the prescribed situation being the presence of at least one of: smoke, fumes, gas, heat, noxious fumes, and fire; and the gas includes at least one of a cooking gas, carbon dioxide or carbon monoxide.
6. 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 in one or more of: the environmental space, and the ducting.
7.          The fan assembly as claimed in claim 6, wherein the motor and fan are within a shroud, and the brake comprises an electric brake component of a variable speed drive.
8.          The fan assembly as claimed in claim 6 or claim 7, 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 at least one of: a cooking gas, carbon dioxide or carbon monoxide.
9.          A ventilation or exhaust system comprising:
(a) ducting;
(b) a fan assembly comprising:
i. a motor having an output shaft;
ii. a fan mounted on the output shaft;
(c) a valve assembly comprising a valve member; and
(d) at least one detector for detecting a prescribed situation, the detector being for controlling the operation of a brake of the fan assembly, and the valve assembly, in response to the detecting.
10. The system as claimed in claim 9 further comprising a control panel comprising a reset control for resetting the at least one detector, releasing the brake of the fan assembly, and moving the valve member to the first position; and at least one sensor for controlling the operation of the fan assembly; the at least one sensor being 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.
11. The system as claimed in claim 9 or claim 10, wherein there are a plurality of sensors arranged in groups, at least one group of the groups of sensors comprising more than one sensor; and wherein the fan assembly operational speed is determined by one of: a number of sensors activated, and a stage in a time sensor.
12.       The  system as claimed in claim 9, wherein the valve assembly comprises: 
(a) the 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 to at least one detection of the presence of one or more of: smoke, fumes, gas, heat, noxious fumes, and fire; and the gas includes at least one of a cooking gas, carbon dioxide or carbon monoxide;
(c) the valve assembly being for location at, adjacent or near an outlet end of the ducting.
13. The valve assembly as claimed in claim 12, wherein the valve member is sized and shaped to substantially accord to an interior size and shape of the ducting.
14. A ventilation or exhaust apparatus substantially as herein described with reference to the accompanying illustrations.
15. A fan assembly substantially as herein described with reference to the accompanying illustrations.
16. A ventilation or exhaust system substantially as herein described with reference to the accompanying illustrations.