Abstract: A method of detecting an operating condition of a controllable flow regulator in a fluid flow channel of an HVAC system, comprising transmitting a sonic signal, from a sonic transmitter, directly or indirectly to the flow regulator, the sonic signal being distinguished from background noise by being at least one of: (i) modulated according to a modulation schema, (ii) an ultrasonic signal, (iii) a frequency selected to be away from background noise, receiving a signal from a sonic receiver for detecting the transmitted signal after interacting with the flow regulator; and determining, in an electronic signal processor, the operating condition of the flow regulator on the basis of the signal received.

Abstract: An anti-rotation connector for releasable coupling a field device with an inner room of a fluidic component via an anti-rotation counter-connector includes a connector stub, an access channel, and a first connector-sided anti-rotation structure. The connector stub has a stub body that extends along a connector axis. The access channel is coaxial with respect to the connector axis and extends through the stub body. The first connector-sided anti-rotation structure is arranged at a lateral stub body surface and is rotationally symmetric of order two with respect to the connector axis. The first connector-sided anti-rotation structure is engageable with a first counter-connector-sided anti-rotation structure of the anti-rotation counter-connector by relatively displacing the connector and the counter-connector towards each other. A locking connector for the releasable coupling includes the connector stub, the access channel, and a circumferential locking structure that is arranged at a lateral stub body surface.

Abstract: A method of monitoring an air flow in a zone (1) of an HVAC system (10) is described, the zone (1) comprising a supply port (11) and a return port (12), a first flow sensor (111) configured to measure a supply flow (?1) through the supply port (11), and a second flow sensor (121) configured to measure a return flow (?2) through the return port (12), the method comprising: recording by a control system (20, 20?) the supply flow (?1) measured by the first flow sensor (111) and the return flow (?2) measured by the second flow sensor (121); determining by the control system (20, 20?) an infiltration and exfiltration component (?inf/exf), using the supply flow (?1) and the return flow (?2) recorded by the control system (20, 20?); and determining by the control system (20, 20?) an operational sensor state of at least one of the first flow sensor (111) and the second flow sensor (121), using the supply flow (?1), the return flow (?2), and the infiltration and exfiltration component (?inf/exf).

Abstract: A method of monitoring an air flow in a zone (1) of an HVAC system (10) is described, the zone (1) comprising a supply port (11) and a return port (12), a first flow sensor (111) configured to measure a supply flow (?1) through the supply port (11), and a second flow sensor (121) configured to measure a return flow (?2) through the return port (12), the method comprising: recording by a control system (20, 20?) the supply flow (?1) measured by the first flow sensor (111) and the return flow (?2) measured by the second flow sensor (121); determining by the control system (20, 20?) an infiltration and exfiltration component (?inf/exf), using the supply flow (?1) and the return flow (?2) recorded by the control system (20, 20?); and determining by the control system (20, 20?) an operational sensor state of at least one of the first flow sensor (111) and the second flow sensor (121), using the supply flow (?1), the return flow (?2), and the infiltration and exfiltration component (?inf/exf).

Abstract: A device for measuring a volume flow in a ventilation pipe (1) comprises a sensor element (13) disposed on the mounting (8) and configured as a thermal anemometer. Upstream of the sensor element is a turbulence-generating element, which is configured and disposed at a distance from the sensor surface (18.1) such that highly turbulent flow is generated in the region of the sensor surface in a targeted manner. Downstream of the sensor surface is a flow element (20), which widens in the cross-section thereof in the flow direction (L), wherein starting from a height level of the sensor surface a height is reached that is greater than the height of the break-away edge (17.1) opposite the sensor surface.

Abstract: A control device (10?) comprises a control unit (10?) with a control element for controlling a fluid flow and being rotatable about a first axis (13) between an open position and a closed position, and a separate motor-driven actuator unit (24), which is mechanically coupled to said control unit (10?) to rotate said control element about said first axis (13) in a controllable fashion, whereby said actuator unit (24) comprises a driving part (25) with a driving element (31) being rotatable about a second axis (26), to be mechanically coupled to said control element in a coupling position to rotate said control element about said first axis (13), and a control part (28) for driving said driving element (31) in a controllable fashion. Said driving element (31) is removably coupled to said control unit (10?) by means of a spur gearing (Hirth serration) (22, 29).

Abstract: A control device (10?) comprises a control unit (10?) with a control element for controlling a fluid flow and being rotatable about a first axis (13) between an open position and a closed position, and further comprises a separate motor-driven actuator unit (24), which is mechanically coupled to said control unit (10?) to rotate said control element about said first axis (13) in a controllable fashion, whereby said actuator unit (24) comprises a driving part (25) with a driving element (31) being rotatable about a second axis (26), to be mechanically coupled to said control element in a coupling position to rotate said control element about said first axis (13), and a control part (28) for driving said driving element (31) in a controllable fashion. An easy and space-saving assembly is achieved having said driving element (31) removable coupled to said control unit (10?) by means of a spur gearing (Hirth serration) (22).

Abstract: This device has a drive output element for the actuation of a rotatable body which is separate or separable from the device, and it has a housing part in which the drive output element is rotatably mounted. The drive output element has a coupling part which is designed for rotational positive locking and which is designed to be mounted on a corresponding coupling connector of the shaft of the rotatable body. The device is characterized in that a quick-action fastener arrangement is provided for the detachable connection of the coupling part to the coupling connector. Further, the quick-action fastener arrangement can have manually actuable elements for enabling the quick-action fastener arrangement to be closed without tools.

Abstract: An anti-twist device retains an actuating motor (10), which is placed in a force-fitting and/or form-fitting manner onto the projecting driveshaft (22) of a pivotable shut-off flap (62) of a gas transport tube (34), in particular of an HVAC tube or flue gas tube for a building, in a longitudinally moveable manner. Arranged at an adjustable axial distance (a) from the driveshaft (22) is at least one clamp (36) which secures the actuating motor (10). The parallel limbs (46) of the preferably substantially U-shaped clamp (36) are of resilient design, wherein in each case one end-side, inwardly projecting latching lug (48) is formed for holding down the actuating motor (10).

Abstract: A device for measuring a volume flow in a ventilation pipe (1) comprises a mounting (8) that can be fixed in the ventilation pipe (1) and a sensor element (13) having a sensor surface (18.1), said element being disposed on the mounting (8) and configured as a thermal anemometer. Upstream of the sensor element (13) is a turbulence-generating element, for example in the form of a break-away edge (17.1), which is configured and disposed at a distance from the sensor surface (18.1) such that highly turbulent flow is generated in the region of the sensor surface (18.1) in a targeted manner. Downstream of the sensor surface (18.1) is a flow element (20), which widens in the cross-section thereof in the flow direction (L), wherein starting from a height level of the sensor surface (18.1) a height is reached that is greater than the height of the break-away edge (17.1) opposite the sensor surface (18.1).

Abstract: An anti-twist device retains an actuating motor (10), which is placed in a force-fitting and/or form-fitting manner onto the projecting driveshaft (22) of a pivotable shut-off flap (62) of a gas transport tube (34), in particular of an HVAC tube or flue gas tube for a building, in a longitudinally moveable manner. Arranged at an adjustable axial distance (a) from the driveshaft (22) is at least one clamp (36) which secures the actuating motor (10). The parallel limbs (46) of the preferably substantially U-shaped clamp (36) are of resilient design, wherein in each case one end-side, inwardly projecting latching lug (48) is formed for holding down the actuating motor (10).