摘要:
A 6-way valve (20) comprises two similar 3-way sub-valves (20a, 20b) being mechanically coupled with each other, such that both sub-valves (20a, 20b) are always in the same position, whereby each sub-valve (20a, 20b) has three different valve ports (33, 34, 35) and a valve member (22′) with an internal connecting channel (29), which valve member (22′) can moved between first and second end positions via an intermediate position such that in said first end position the first (33) and third (35) valve ports are connected with each other by means of said connecting channel (29), in said second end position the second (34) and third (35) valve ports are connected with each other by means of said connecting channel (29), and in said intermediate position said connecting channel (29) is disconnected from said first and second valve ports (33, 34).A simple and effective volume/pressure relief means (28) is provided at one of said valve members (22′), which volume/pressure relief means (28) establishes a hydraulic relief connection between said first or second valve port (33, 34) and said third valve port (35) of the respective sub-valve (20a or 20b), when said sub-valves (20a, 20b) are in said intermediate position, and is inactive, when said sub-valves (20a, 20b) are in the first or second end positions.
摘要:
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).
摘要:
A 6-way valve (20) comprises two similar 3-way sub-valves (20a, 20b) being mechanically coupled with each other, such that both sub-valves (20a, 20b) are always in the same position, whereby each sub-valve (20a, 20b) has three different valve ports (33, 34, 35) and a valve member (22′) with an internal connecting channel (29), which valve member (22′) can moved between first and second end positions via an intermediate position such that in said first end position the first (33) and third (35) valve ports are connected with each other by means of said connecting channel (29), in said second end position the second (34) and third (35) valve ports are connected with each other by means of said connecting channel (29), and in said intermediate position said connecting channel (29) is disconnected from said first and second valve ports (33, 34).A simple and effective volume/pressure relief means (28) is provided at one of said valve members (22′), which volume/pressure relief means (28) establishes a hydraulic relief connection between said first or second valve port (33, 34) and said third valve port (35) of the respective sub-valve (20a or 20b), when said sub-valves (20a, 20b) are in said intermediate position, and is inactive, when said sub-valves (20a, 20b) are in the first or second end positions.
摘要:
A hydraulic network (1) having plural parallel zones (Z1, Z2) with a regulating valve (V1, V2) in each zone for regulating a flow of fluid (φ1, φ2) through respective zones. Characteristic parameters of the hydraulic network (1) include static flow capacity values (Kex,a, Kex,b) of the zones. Measurement data sets are recorded which include a determined value of a hydraulic system variable of the hydraulic network (1), e.g. the total flow (φtot) or the system pressure (ΔP), and valve positions of the regulating valves (V1, V2) set for the determined value of the hydraulic system variable. The characteristic parameters are calculated from plural measurement data sets, by grouping related measurement data sets, which include the same value of the hydraulic system variable but different valve positions, and by using the flow capacity (Kvalve,a, Kvalve,b) of the regulating valves (V1, V2) at the valve positions included in the data sets.
摘要:
A connecting device comprises housing, a board with electrical components, including at least one digital bus connection and an input/output section. It allows outsourcing of analogue and digital I/O from a connected device, e.g. an HVAC actuator control unit by decentralizing inputs and outputs.
摘要:
A control valve having a closing element, mounted in a housing between an inlet side and an outlet side and rotatable about an axis between a first and second end positions, and a passage channel through the closing element perpendicularly with respect to the rotational axis. The channel has inlet and outlet openings and connects the inlet side to the outlet side in the first end position, disconnects the inlet side from the outlet side in the second end position, and permits an increasing throughflow of a medium during the transition from the second end position into the first end position with a characteristic curve. Low valve noise is achieved because of the shape, size and configuration of the inlet and outlet openings of the passage channel and the configuration of walls of the passage channel without steps and edges.
摘要:
For controlling opening (B2) of a valve in an HVAC system to regulate the fluid flow through a thermal energy exchanger and adjust power transfer of the thermal energy exchanger, a control system sets (S6) a control signal for the valve to different setpoints and records (S1) a plurality of data points. Each data point includes for a certain setpoint operating data values related to the power transfer effectuated by the thermal energy exchanger with the control signal set to the certain setpoint. The control system determines (S2) a fitting curve for the data points and determines (S3) a transformation which transforms the fitting curve into a transformed curve having a given target shape. The control system controls (B2) the opening of the valve by transforming (S5) the setpoint to a transformed setpoint, using the transformation, and setting (S6) the control signal for the valve to the transformed setpoint.
摘要:
A room unit for an HVAC system is disclosed including a connection means to connect the device to the HVAC system, a controller and a housing. The housing includes a mounting plate for installing a room unit on a wall of a building. The mounting plate includes a base plate with a circumferential rim projecting away perpendicularly from the base plate. The mounting plate includes at least one first protrusion projecting away from an outer surface of the rim in a direction parallel to the base plate. The housing frame includes a circumferential side wall that laterally surrounds the inside of the room unit. The side wall is configured to receive the rim of the mounting plate with positive fit. The housing frame includes at least one second protrusion projecting away from an inner surface of the side wall towards an opposite inner surface of the housing frame.
摘要:
The invention relates to an HVAC field device comprising a plurality of HVAC device blocks. The HVAC field device comprises: a) a base HVAC device block comprising: a base housing; an electric motor configured to drive an actuated part, and/or a sensor for the measurement of operational parameters of an HVAC system; a base control module connected to the electric motor, and/or the sensors; a base near field communication (NFC) circuit connected to the base control module; and b) a first add-on HVAC device block comprising: an add-on housing and a first add-on NFC antenna, wherein the base HVAC device block and the first add-on HVAC device block are mechanically connected, and wherein the first NFC antenna is electrically connected to the base HVAC device block.
摘要:
For controlling an electric motor to maintain a current motor position, a motor controller determines the current motor position of the electric motor and selects (S41) from a set of stable positions, defined by cogging torque of the electric motor, a selected stable position closest to the current motor position. The controller controls the motor torque of the electric motor to maintain the motor position (S4) within a defined range around the selected stable position.