Abstract: Method and air treatment device (1) for control of supply air flow (L1). The air treatment device (1) comprises a chilled beam (2) with a pressure box (5) comprising an inlet (6) for inflow of supply air flow (L1) and a plurality of outlets (7) for outflow of the supply air flow (L1) out of the pressure box (5). The air treatment device (1) comprises an actuator (12) for control of supply air flow (L1), and the pressure box (5) comprises at least one pressure measuring socket (13) for control of static pressure (ps). The air treatment device (1) registers the static pressure (ps) and the position of the actuator (12), and calculates the real supply air flow (L1). The actuator (12) is arranged to change the configuration of the outlets (7) by a linear motion of a cover member (9) and change the open area of the outlets (7).

Abstract: Method and air treatment device (1) for control of supply air flow (L1). The air treatment device (1) comprises a chilled beam (2) with a pressure box (5) comprising an inlet (6) for inflow of supply air flow (L1) and a plurality of outlets (7) for outflow of the supply air flow (L1) out of the pressure box (5). The air treatment device (1) comprises an actuator (12) for control of supply air flow (L1), and the pressure box (5) comprises at least one pressure measuring socket (13) for control of static pressure (ps). The air treatment device (1) registers the static pressure (ps) and the position of the actuator (12), and calculates the real supply air flow (L1). The actuator (12) is arranged to change the configuration of the outlets (7) by a linear motion of a cover member (9) and change the open area of the outlets (7).

Abstract: Method and device for defrosting of an evaporator (1) in a heat pump (2) connected to an air handling unit (9), which comprises a controllable heat recovery device (10). The heat pump (2) comprises a refrigerant system (3) with a refrigerant (4), a compressor (5), a condenser (6), a first expansion valve (7) and an evaporator (1). A four-way valve (8) is arranged after the compressor (5) and before the condenser (6), for changing a flow direction of the refrigerant (4) to the evaporator (1) instead of the condenser (6). The heat recovery device (10) recovers energy from first air stream (11) and transfer energy to second air stream (12). When frost formation occurs, the refrigerant temperature is increased and the recovery device (10) is regulated down so that heating of the evaporator (1) is accomplished, both from inside and outside to defrost the evaporator (1).

Abstract: Method and device for defrosting of an evaporator (1) in a heat pump (2) connected to an air handling unit (9), which comprises a controllable heat recovery device (10). The heat pump (2) comprises a refrigerant system (3) with a refrigerant (4), a compressor (5), a condenser (6), a first expansion valve (7) and an evaporator (1). A four-way valve (8) is arranged after the compressor (5) and before the condenser (6), for changing a flow direction of the refrigerant (4) to the evaporator (1) instead of the condenser (6). The heat recovery device (10) recovers energy from first air stream (11) and transfer energy to second air stream (12). When frost formation occurs, the refrigerant temperature is increased and the recovery device (10) is regulated down so that heating of the evaporator (1) is accomplished, both from inside and outside to defrost the evaporator (1).

Abstract: This invention relates to a radial blade wheel comprising a first (1,1?) and a second (2,2?) end plate arranged at a mutual distance from each other, the first end plate having an opening (6) which allows inflow to the radial blade wheel, and blades (3) arranged between the first and the second end plate. To achieve optimal efficiency for the radial blade wheel, the radial blade wheel comprises an inner part with blades, in which curvature (R1) of the blades (3) is shaped to bring motion energy to the flowing particles while the radial blade wheel is rotating, and an outer part with blades, in which curvature (R2) of the blades (3) is shaped not to bring motion energy to the flowing particles while the radial blade wheel is rotating.

Abstract: A device for an air handling system in which the cooling beam has a pressure chamber (2), from which the volume flow of the supply air (L1) out to the room is regulated with a regulating strip (6) that is mounted on the surfaces (9) in the pressure chamber and where the flow of the supply air (L1), in the mixing chamber (4), provides an optimal flow pattern of the recirculating air (L2) from the room and where the combined flow of supply air (L1) and recirculating air (L2) acquire well defined flow profiles independent from the volume flow (L1).

Abstract: A device for an air handling system in which the cooling beam has a pressure chamber (2), from which the volume flow of the supply air (L1) out to the room is regulated with a regulating strip (6) that is mounted on the surfaces (9) in the pressure chamber and where the flow of the supply air (L1), in the mixing chamber (4), provides an optimal flow pattern of the recirculating air (L2) from the room and where the combined flow of supply air (L1) and recirculating air (L2) acquire well defined flow profiles independent from the volume flow (L1).

Abstract: This invention relates to a radial blade wheel comprising a first (1,1?) and a second (2,2?) end plate arranged at a mutual distance from each other, the first end plate having an opening (6) which allows inflow to the radial blade wheel, and blades (3) arranged between the first and the second end plate. To achieve optimal efficiency for the radial blade wheel, the radial blade wheel comprises an inner part with blades, in which curvature (R1) of the blades (3) is shaped to bring motion energy to the flowing particles while the radial blade wheel is rotating, and an outer part with blades, in which curvature (R2) of the blades (3) is shaped not to bring motion energy to the flowing particles while the radial blade wheel is rotating.

Abstract: The invention relates to a high-pressure fan which comprises an electric motor provided with a shaft that goes through it; blade wheels which are mainly made of a carbon fibre-based composite material, arranged on both sides of the electric motor and mounted directly on the shaft of the electric motor; fan housings surrounding the blade wheels; and an intermediate channel which connects a pressure opening of one fan housing to a suction opening of the other fan housing, the intermediate channel being integrated into the base structure of the high-pressure fan.

Abstract: The present invention relates to a radial blade wheel (1) with blades (3), a first wall (2) connected with the blades and having an opening (4) for enabling a flow through the wall (2) to the blades (3), and a second wall (5) connected with the blades (3), by which the radial blade wheel (1) may be connected with an apparatus rotating it. To achieve a higher efficiency, the protrusion of the blades (3) in the radial direction diminishes at intervals from the first wall (2) towards the second wall (3).