Abstract: A corrugated laminate material (44) for use in an evaporative heat exchanger, said material including a water retaining medium having a wettable surface (40) and an opposed vapour resistant surface (42).

Abstract: A corrugated laminate material (44) for use in an evaporative heat exchanger, said material including a water retaining medium having a wettable surface (40) and an opposed vapour resistant surface (42).

Abstract: A corrugated laminate material (44) for use in an evaporative heat exchanger, said material including a water retaining medium having a wettable surface (40) and an opposed vapour resistant surface (42).

Abstract: A protective device fitted to an electromagnetic coil to prevent damage to a thermal protective switch installed in the electromagnetic coil beneath the winding. In a preferred embodiment there is a subsequent encapsulation process following manufacture of the coil. Preferably, said device comprises a protective cap shaped to conform with the shape of the thermal switch and closely fitting the thermal switch and wiring connected thereto.

Abstract: A protective device fitted to an electromagnetic coil to prevent damage to a thermal protective switch installed in the electromagnetic coil beneath the winding. In a preferred embodiment there is a subsequent encapsulation process following manufacture of the coil. Preferably, said device comprises a protective cap shaped to conform with the shape of the thermal switch and closely fitting the thermal switch and wiring connected thereto.

Abstract: A mechanism is disclosed for the activation of a system which will deliver material such as a fire extinguishant in response to an electrical signal from a fire detector. The mechanism is actuated by a small electrical storage device which operates the system even after a fire or other event has occurred and the normal electrical supply is lost. Upon actuation, a container of pressurized carbon dioxide gas is used to pressurize a container of fire extinguishing fluid, which is then delivered by a spray mechanism to the source of the fire. A feature of the mechanism is that energy levels for initiation are very low, and all other sources of energy are self contained within the mechanism.

Abstract: A system for the detection of fire in an apparatus or device having a fan and a pump, comprising means 20, 25 for detecting the presence of a pre-condition of fire, control means 30 for deactivating the fan on detection of said precondition, and fire detector means 35 for detecting smoke or fire in the absence of air movement.

Abstract: Cooling means for cooling an electric motor mounted on or adjacent a volute of a centrifugal fan, the cooling means including an opening through the wall of the volute, and a shroud connected to the volute, the shroud including a volute end and a motor end, wherein the volute end of the shroud substantially covers the opening, and the motor end of the shroud extends around at least a portion of the periphery of the electric motor, such that the shroud provides a passage for flow of air from the volute and directs the flow of air around at least a portion of the periphery of the motor.

Abstract: An air conditioning installation designed with regard to achieving a comfort temperature as well as meeting heat load requirements for a conditional space. The comfort temperature being dependent upon the velocity of the air flow in the space and the design being established by an iterative process until the comfort temperature differs from the exit temperature of the space within predetermined limits.

Abstract: Desiccant brine is heated and diluted in an air drier by coming into contact with air to be cooled in an evaporative cooler but is regenerated by dewatering in a vacuum chamber, from which it is discharged first into a sump, and then back into the vacuum chamber. Both the desiccant brine and air are heated in the air drier and the hot brine when in the vacuum chamber has a temperature above atmospheric, which provides a higher vapor pressure and its water is readily vaporized. The higher efficiency reduces the amount of heat input required, and thereby reduces the extent of heat exchanger requirement.

Abstract: An evaporative air cooler evaporates water in multistages by passing air across a series of spaced parallel wetted wicks (11) which repeatedly interrupt air flow. This enhances both evaporation and heat transfer rates.