Abstract: The invention relates to an inlet nozzle for a radial fan, having a plurality of flow sections defined over the wall of the inlet nozzle (1), as viewed in the direction of flow, said flow sections comprising at least: an inlet section (2) which has an inlet opening (7), a perturbation section (3) directly adjoining the inlet section (2), and an outlet section directly adjoining the perturbation section (3), wherein the flow cross-section of the inlet nozzle (1) decreases in the inlet section (2), and wherein the perturbation section (3) that is formed between the inlet section (2) and the outlet section (4) is designed as cylindrical over its entire axial length and extends parallel to the rotational axis of the inlet nozzle (1), so that the flow cross-section of the inlet nozzle (1) is constant in the perturbation section (3).

Abstract: The invention relates in particular to a ventilator wheel of an axial ventilator, which includes multiple blades, each having radially outward extending blade forward edges and radial outer edges on the outlet side, wherein a transition from the radial outer edges to the blade forward edges is formed, in each case with a projection extending in the circumferential direction relative to the adjacent, radially outward extending blade forward edges, wherein a seamless transition is formed from the radial outer edge portion (7) to a region of the respective blade situated radially further inward.

Abstract: The invention relates to a blade for a fan impeller. In particular, the invention relates to the geometric configuration of the blade in its end area facing a hub. Furthermore, the invention relates to a fan impeller. A blade according to the invention for a fan impeller has an end area facing a hub, whereby the blade has at least one rib in the end area facing the hub, whereby the rib has an outer contour that simulates a flow profile.

Abstract: A rooftop-mounted air-conditioning installation, in particular for the roof of a bus, has at least having a condenser unit and an evaporator unit. It has an air-flow duct with at least one air intake opening and one air discharge opening. A heat exchanger and a radial fan are arranged in the air-flow duct between the air intake opening and the air discharge opening. An axis of rotation of a fan wheel of the radial fan is oriented parallel to an air flow main direction that extends through the air-flow duct from the at least one air intake opening through the heat exchanger to the radial fan.

Abstract: A radial fan has a housing with a motor-drivable fan wheel. The fan wheel generates an air volume flow during operation. The housing has a blow-out portion (4) with an impeller (5). The impeller (5) has a plurality of impeller blades (7) spaced apart in the circumferential direction. The impeller (5) is driven by the air volume flow generated by the fan wheel.

Abstract: A ventilation unit (1) designed for installation and use at a refrigeration plant has a fan and a heat exchanger (3) arranged in series with the fan. The fan is designed and positioned with regard to the heat exchanger (3) so as it delivers, in operation, an air volume flow through the heat exchanger (3) and out from the ventilation unit. The fan is designed as a diagonal fan (2). The diagonal fan axially draws in the air volume flow during operation and blows it out diagonally at an angle relative to its axis of rotation (RA).

Abstract: A housing for a fan or blower, in particular an axial fan, includes a wall ring (2) having an inlet nozzle section (3), an outer diffuser (6) having an inlet flow opening (7) and an outlet flow opening (8), and a holder for an electric motor (9) of the fan. The holder is arranged in an inner space of the housing. The outer diffuser (6) is formed by at least two partial ring sections that are connected to the outer circumferential surface via mechanical connection elements. The holder includes several struts (14) that are fastened to an inner circumferential surface of the outer diffuser (6) by one end, are circumferentially spaced apart, and are fastened in the edge region of the inlet flow opening (7). The struts can be installed by their other end to a motor flange (16) of the motor housing (17) of the electric motor (9).

Abstract: A connecting element (1) interacting with a fan blade (50) to transfer torque of a drive to the fan blade (50). An attachment portion (2) connects the connecting element (1) with the fan blade. The attachment portion (2) forms an outer edge portion (4) adjoining the outer contour of the connecting element (1). The attachment portion (2) cross-sectional shape is designed to taper toward the outer edge in at least some portions.

Abstract: A diffuser (3) for a fan (2) of axial, radial or diagonal type of construction, has an inlet opening (10) and having an outlet opening (20) for a gaseous medium which flows through a diffuser interior (I), which is enclosed by an outer housing (30), in an axially oriented main flow direction (S) from the inlet opening (10) to the outlet opening (20). The cross section of the diffuser interior (I) increases from the cross section (11) of the inlet opening to the cross section (21) of the outlet opening (20), wherein the outer housing (30) forms an outer diffuser part (AD) which delimits the diffuser interior (I) to the outside. Along the main flow direction (S), the cross section of the outer diffuser part (AD) changes from a circular cross section (31) at the inlet opening (10) to a non-circular cross section (32) at the outlet opening (20).

Abstract: The disclosure relates to a rooftop-mounted air-conditioning installation, in particular for the roof of a bus, at least having a condenser unit and an evaporator unit which has an air-flow duct with at least one air intake opening and one air discharge opening, wherein a heat exchanger and a radial fan which generates an air flow are arranged in the air-flow duct between the air intake opening and the air discharge opening, and an axis of rotation of a fan wheel of the radial fan is oriented parallel to an air flow main direction which extends through the air-flow duct from the at least one air intake opening through the heat exchanger to the radial fan.

Abstract: The disclosure relates to a flow-conducting grille for arranging on the suction side of a fan, with a grille web structure which comprises radial webs spaced apart in the circumferential direction and coaxial circumferential webs spaced apart in the radial direction, wherein the radial webs of at least one quadrant of the flow-conducting grille are curved in each case over their radial extension, viewed in the circumferential direction, towards a predetermined radial plane extending from a central axis of the flow conducting grille.

Abstract: A spiral housing of a radial fan has a flow cross-sectional area which, starting from a housing tongue, increases in the circumferential direction, around a fan impeller which can be arranged on an axial central axis. The cross-sectional area is determined via a contour of at least one axial side part of the spiral housing. The one axial side part has an axial suction opening with an opening edge section surrounding the suction opening, which is directly adjoined, viewed in the radial direction, by a transition section extending in the circumferential direction. The transition section, in a starting section which extends from the housing tongue in the circumferential direction over a predetermined angle, is spaced apart in the axial direction relative to the opening edge section and has a course which increases the flow cross section in the circumferential direction until axial surfaces of the opening edge section and of the transition section extend in the same plane.

Abstract: A fan housing includes a housing body for accommodating fan components and an outer casing which surrounds the housing body in circumferential direction. The housing body has at least two webs extending in a circumferential direction on the radial outer side. The outer casing has at least two ribs extending in the circumferential direction on the radial inner side. The ribs, in the assembled state, between the housing body and the outer casing, form a channel circulating in the circumferential direction for receiving and holding a heating band. The outer casing has at least one guiding rib directed in the radial direction toward a housing body as well as into the channel and extending in the circumferential direction.

Abstract: The invention relates to an inlet nozzle for a radial fan, having a plurality of flow sections defined over the wall of the inlet nozzle (1), as viewed in the direction of flow, said flow sections comprising at least: an inlet section (2) which has an inlet opening (7), a perturbation section (3) directly adjoining the inlet section (2), and an outlet section directly adjoining the perturbation section (3), wherein the flow cross-section of the inlet nozzle (1) decreases in the inlet section (2), and wherein the perturbation section (3) that is formed between the inlet section (2) and the outlet section (4) is designed as cylindrical over its entire axial length and extends parallel to the rotational axis of the inlet nozzle (1), so that the flow cross-section of the inlet nozzle (1) is constant in the perturbation section (3).

Abstract: A ventilation device, in particular for heating, cooling and/or humidifying air in residential buildings, includes a duct-shaped housing (1) with an air inlet opening (2) and an air outlet opening (3), and a fan impeller (6) as well as a filter unit, heat exchange unit and/or heating coil unit (14) arranged in the main flow direction (Z) of an air flow generated by the fan impeller (6). An air guiding device (17) is arranged in the flow direction (Z) of the air flow in front of a suction nozzle (16)—configured as a flow conditioner, includes a bar structure with air guiding bars-such that a flow inlet opening is configured on the suction side at an axial height in front of the flow inlet opening (15) by the bar structure whose opening surface is smaller than the opening surface of the flow inlet opening (15).

Abstract: The present disclosure relates to a current rectifier for being arranged on the suction area of a ventilator, with an axial initial flow side and an axial exit flow side, wherein the current rectifier comprises several crossing struts formed by at least one circumferential strut and by at least one radial strut, and a pressure measuring conduit is constructed at least in one of the struts and which comprises at least one opening facing the exit flow side, and wherein the pressure measuring conduit comprises a measuring opening for being connected to a measuring line for the connection to a pressure sensor or a pressure sensor is integrated in the pressure measuring conduit.