Abstract: The invention relates to a fan unit comprising a tubular external housing which has inlet and outlet connectors placed coaxially one behind in the other. A radial impeller have backwardly directed vanes. A distributor surrounds the radial impeller and positioned downstream thereof. The distributor is secured on an inner side of the housing and having a plurality of guide vanes extending axially and circumferentially spaced around the periphery. The vanes are adapted to deflect the flow of impelled fluid radially emerging from the impeller to an axial direction and which are so inclined at an angle of attack, which is selected in accordance with the direction of emergence of the impelled fluid in relation to the axis of rotation of the radial impeller that a smooth even flow transition takes place in the distributor. The ring of guide vanes coaxially surrounds the impeller with a clearance gap of substantially constant width.

Abstract: A fan unit is designed for installation in ducting systems or in similar casings in air conditioning and ventilation systems. The fan unit has a freely turning radial impeller without any spiral housing and has a driving motor for the impeller. Downstream from the outlet of the impeller, there is a guiding structure for redirecting the flow coming radially out of the impeller to an axial direction.

Abstract: The invention relates to a motor-powered roof ventilator or extractor fan having its motor-impellor unit mounted within the housing for mounting on the roof or wall of a building. The centrifugal impellor draws in air through a base member adapted for attachment to the roof by way of an intermediate mount and expels it through oblique, diverging outlet ports away from the roof. The outlet ports are constituted by the ends of channel-like, mutually opposite side parts of the housing which are hinged to the base member and may be folded away from the rest of the housing to uncover the centrifugal impellor and the motor for inspection and servicing.

Abstract: An external rotor motor used in drying fans and blowers provides an air current within a hollow fixed post which passes through the stator of the motor so that heat is transferred to the air current from the stator interior and transported by the air current to the end of the hollow post. At the end of the hollow post there is an air foil mounted normal to the post and designed for producing a radial air flow in a space between the air foil and the end plate of the rotor. An air flow produced by the impellers mounted to the rotor draw the air from the space and produces the current of air in the hollow post which thereby removes heat from the stator. Heat pipes may also be mounted within the hollow shaft to remove heat from the stator.

Abstract: A blower unit, designed for use for example with air-conditioning plant, has an outer housing with a first aspiration or inlet connection forming part of an aspiration duct for a primary volume flow, and a second aspiration connection forming part of an aspiration duct for a secondary volume flow. The outer housing furthermore has outlet or pressure connections joined up with the primary and with the secondary circuits for the supply of air thereto. In the housing two blower impellers are placed and the outer part of the housing has an adjustable unit which may be moved into different positions of adjustment so that the volume flows incoming at the outlet side of the blower impellers may be directed by different adjustments to the pressure (or outlet) connections as may be desired. The outer housing has two separate spaces in which the two blower impellers are placed which are fixed in an axial direction. Each such blower impeller has an air guiding housing.

Abstract: The invention in connection with regenerative heat exchangers and ways of manufacturing them. The outer wall of the tubular rotor of such a heat exchanger is made up of one or more layers of an embossed aluminum strip that are fixed on edge and running radially outwards and in the form of a structure whose generatrix is a radius moving along a helical path, the structure being supported on an inner core. The embossing process is responsible for producing folds or puckers in the strip at its radially inner edge; furthermore the strip may have a stepped and/or waved form. Because of the helical coiling of the strip on a core, a rotor is produced whose outer wall may be used for the radial motion therethrough of flows giving or taking up heat.

Abstract: A radial fan has airfoil-like, backwardly curved blades placed between a support plate and a cover plate. The blades are so formed that the blade entry angle on the cover plate side is 4.degree. to 7.degree. smaller than the blade entry angle on the support plate side and the blade exit angle on the cover plate side is 3.degree. to 6.degree. smaller than the blade exit angle on the support plate side. The blade entry angle on the cover plate side is between 14.degree. and 20.degree. and the blade exit angle on the cover plate side is between 39.degree. and 45.degree.. This form is produced by twist of the blades or twist-free deformation thereof.

Abstract: A blower unit, designed for use for example with air-conditioning plant, has an outer housing with a first aspiration or inlet connection forming part of an aspiration duct for a primary volume flow, and a second aspiration connection forming part of an aspiration duct for a secondary volume flow. The outer housing furthermore has outlet or pressure connections joined up with the primary and with the secondary circuits for the supply of air thereto. In the housing two blower impellers are placed and the outer part of the housing has an adjustable distributor unit which may be moved into different positions of adjustment so that the volume flows incoming at the outlet side of the blower impellers may be directed by different adjustments to the pressure (or outlet) connections as may be desired. The outer housing has two separate spaces in which the two blower impellers are placed which are fixed in an axial direction. Each such blower impeller has an air guiding housing.

Abstract: A regenerator with a hollow cylindrical heat exchange roller which is provided with a jacket of heat carrier material with separated flow regions that are passed through by a flow medium emitting heat and a flow medium receiving heat. The hollow cylindrical roller has a partition wall which separates the flow regions. The flow media pass through the regions by substantially radial passages through the jacket and transverse to the axis of rotation of the heat exchange roller. A housing which holds the roller is provided with radial inlet and outlet channels for the flow media. These channels are displaced from one another by substantially 90.degree..

Abstract: A device for pumping a liquid or gaseous current medium has a casing designed to guide the flow of the current medium and a rotary bearing motor driven rotor wheel designed to pump the current medium through the casing. The rotor wheel is equipped with a number of blades mounted on a shaft or other machine part whose function resembles that of a shaft, the blades being installed one behind the other in series in the direction of circulation. The blades project almost radially outwards in one embodiment and extend over the axial length of the rotor wheel in another embodiment. A partition fitted to the rotor wheel separates the volume flow of the medium pumped through the casing into an incoming pumping medium current, e.g. the inlet air or external air current, and an outgoing pumping medium current, e.g. the expelled air or outgoing air current. At least one heat pipe is fitted permanently to each blade, and rotates with its respective blade.