Abstract: An add-on Heating, Ventilating and Air Conditioning (HVAC) device block includes a housing, an add-on electronic circuit and an add-on interface. The add-on HVAC device block establishes, upon attachment of the add-on interface to an extension interface of a base HVAC device block, a first electrical connection between the add-on electronic circuit and an external electrical interface and a second electrical connection between the add-on electronic circuit and an HVAC functional device of the base HVAC device block. The add-on HVAC device block is operable in a sensor operation mode, for operation with a base HVAC device block including a sensor; and/or an actuator operation mode for operation with a base HVAC device block including an actuator for actuating a drivingly attached actuated part.

Abstract: A Heating, Ventilation and Air Conditioning (HVAC) field device includes a housing. an HVAC functional device including a sensor that measures a physical quantity of a system and/or includes an actuator for actuating a drivingly coupled actuated part, an extension interface, and an electronic circuit coupled to the HVAC functional device and the extension interface. The electronic circuit performs a validation of an add-on identifier, the add-on identifier corresponding to an add-on device attachable to the extension interface, and enables exchange of a data signal between the HVAC field device and the add-on device via the extension interface following a successful validation of the add-on identifier and/or blocks exchange of the data signal between the HVAC field device and the add-on device via the extension interface in the absence of successful validation of the add-on identifier.

Abstract: A pneumatic adapter for a Heating, Ventilation, and Air Condition (HVAC) sensor device includes an adapter body made of an elastomer, the adapter body having two inlet openings that extend into the adapter body in a main extension direction and that connect to two pneumatic ports of the HVAC sensor device, respectively, two outlet openings that extend into the adapter body and that connect to two pneumatic connectors of a sensor module of the HVAC sensor device that measures one or more characteristics of an HVAC fluid, and two channels that connect the two inlet openings to the two outlet openings, respectively.

Abstract: A system and method of detecting positions of HVAC automation devices of an HVAC system with respect to an HVAC information plan representing the HVAC system are described. For each HVAC automation device, separation distances between the respective HVAC automation device and multiple other HVAC automation devices and/or a mobile device are measured using antenna transmission and reception distance measuring. Separation distance data is generated. For each HVAC automation device, a position in the HVAC information plan is identified based on the separation distance data.

Abstract: A method of controlling a thermal power transfer of a thermal energy exchanger (80) of an HVAC system (1), the method comprising: receiving, by a controller (10), a setpoint thermal power transfer (Power SP); measuring, by a flow sensor (52), a measured flow of fluid (?act) through the thermal energy exchanger (80); determining, by the controller (10), an estimated thermal power transfer (Power EST), using the measured flow of fluid (?act) and a defined flow rate to delta-T mapping; comparing, by the controller (10), the setpoint thermal power transfer (Power SP) and the estimated thermal power transfer (Power EST); and regulating, by the controller (10), the flow (?act) of the fluid (W) through the thermal energy exchanger (80) based on the comparing.

Abstract: A Heating, Ventilating, and Air Conditioning, HVAC, actuator for actuating an actuated part in an HVAC system includes an electric motor and a controller that controls the electric motor. The controller includes an Application Specific Integrated Circuit, ASIC, that includes an analog circuit and a digital circuit, the analog circuit of the ASIC generates a motor current for the electric motor, the digital circuit of the ASIC generates control signals for controlling the analog circuit, and the digital circuit of the ASIC includes a motor control circuit, a microprocessor directing the motor control circuit, and a memory having stored therein program code to control the microprocessor.

Abstract: A device for monitoring a characteristic of an airflow, especially in an HVAC system, includes: an inlet port for receiving a partial airflow (PAF) of the airflow to be monitored (AF); a particle separator arranged downstream the inlet port and configured for separating particles (P) having a particle size and/or particle weight above of a given threshold out of the partial airflow; a measurement cell located downstream the particle separator and including a fluid flow channel with a channel inlet and channel outlet for guiding the partial air flow (PAF) from the channel inlet through the measurement cell to the channel outlet; a sensor unit configured for measuring at least one characteristic of the partial airflow (PAF) when passing through the fluid flow channel; and an outlet port for discharging the partial airflow after having passed the measurement cell.

Abstract: A base HVAC device block (10) comprising a housing (11); an HVAC functional device (M/S); an extension interface (16A); an external electrical interface (18) for the transmission of electrical power and data signal(s); and an electronic circuit (12) connected with the HVAC functional device (M/S). In a first configuration, the base HVAC device block (10) is configured to connect the external electrical interface (18) with the electronic circuit (12) for transmission of data signal(s) and thereby provide HVAC functionality(s) of a first category. In a second configuration, the base HVAC device block (10) is configured to route the transmission of data signal(s) through an add-on electronic circuit (22) of an add-on HVAC device block (20) attached to the base HVAC device block (10) via an add-on interface (26B) of the add-on HVAC device block (20) to thereby provide HVAC functionality(s) of a second category.

Abstract: Apparatuses and devices in heating, ventilating, and air conditioning systems are described. A device can include a rectifier including a first input interface configured to receive a first input signal and a second input interface configured to receive a second input signal. The device can further include a half-wave path configured to convert one of the first input signal and the second input signal into a half-wave output. The device can further include a low-pass filter (LPF). The device can further include a circuit connected between a rectifier in the power supply and the LPF. The circuit can include a plurality of resistance paths. The circuit can be configured to receive the half-wave output from the rectifier. The circuit can be further configured to, based on a current of the half-wave output, pass the half-wave output through one of the plurality of resistance paths.

Abstract: A near field communication device for communicating with a field device of a heating, ventilation and air conditioning system includes an electronic circuit that controls the near field communication device, and a near field communication circuit that is connected to the electronic circuit for near field communication with the field device. The electronic circuit controls the near field communication circuit to enable or disable the near field communication depending on one or more of information attributed to the field device or information attributed to the near field communication device.

Abstract: A room operating unit (ROU) which is integral part of a HVAC system has an operating unit providing different functionalities, a device terminal and an analog sensor unit including an electrical circuit for determining room temperature. Depending on the construction of the device, self-heating effects caused by the heat generating components of the device may affect the result of the temperature measurement, i.e., the ambient temperature of the sensor unit may be higher than room temperature. Therefore, the sensor unit comprises a compensation circuit for correcting the temperature output by the sensor unit by eliminating self-heating effects.

Abstract: An ultrasonic flowmeter for measuring a flow of fluid through a channel includes a flowmeter body, and two or more ultrasonic transducers attached to the flowmeter body. The two or more ultrasonic transducers emit an ultrasonic pulse into the channel and receive an ultrasonic pulse in the channel and are arranged at a distance from each other in flow direction, when the flowmeter body is fixed to the channel. One or more ultrasonic transducer of the two or more ultrasonic transducers is attached to the flowmeter body by an acoustic decoupling element.

Abstract: A method of operating an HVAC system that includes a thermal energy source and a thermal energy transfer device, using a flow regulating device arranged to regulate a flow rate of a fluid between the thermal energy source and the thermal energy transfer device, the method including determining a supply temperature of the fluid, determining a return temperature of the fluid, determining the flow rate of the fluid, and regulating the flow rate of the fluid such as to maintain a target temperature difference between the supply temperature and the return temperature, while ensuring that the return temperature is above a minimum return temperature threshold and the flow rate is above an operational flow rate threshold of the thermal energy transfer device.

Abstract: A brushless DC motor includes a stator, a permanent magnet rotor, a motor shaft, and a shaft bearing. The brushless DC motor has a motor axis. The stator includes a set of teeth, each of the teeth being spaced apart from the rotor by a gap having a gap width. The motor shaft and the shaft bearing are radially biased with respect to each other by a magnetic biasing force, the magnetic biasing force acting in a fixed radial direction. A tooth design of the teeth differs among the teeth.

Abstract: An actuator includes an electric motor having cogging torque, and a controller that controls operation of the electric motor and determines a motor position of the electric motor, the electric motor having a set of stable positions being defined by the cogging torque. The controller includes a circuit that controls the electric motor to drive an actuated part of a Heating, Ventilating, and Air Conditioning system to a target position and maintain a current motor position by controlling a motor torque of the electric motor to maintain the motor position within a defined range around the stable position closest to the current motor position.

Abstract: A heating, ventilating and air conditioning (HVAC) sensor device includes a control signal input for receiving, from an HVAC controller, a control signal for controlling a HVAC actuator, a control signal output for transmitting a control signal to the HVAC actuator; and an electronic circuit, which receives a sensor signal indicative of condensation and/or indicative of relative humidity; and passes through the control signal to the control signal output in response to the sensor signal indicative of condensation and/or indicative of relative humidity being within defined ranges, or overwrites the control signal received at the control signal input with a control reference value and outputs the overwritten control signal at the control signal output in response to the sensor signal being outside the defined ranges. The control reference value causes the HVAC actuator to move an actuated part to a safety position which reduces and/or prevents formation of condensation.

Abstract: A method of controlling a Heating, Ventilating and Air Conditioning (HVAC) system including a fluid transportation network that includes one or more network sections, each network section being connected to a fluid transportation circuit through respective supply lines and return lines, each network section including plural parallel zones, includes arranging a pressure regulating device in the supply lines and/or respective return lines of the network sections, arranging flow regulating devices in the zones of the network sections, measuring a remote differential pressure of the fluid in a first zone of the plurality of zones of each of the network sections, and controlling, by a controller, the pressure regulating devices of each network section to maintain the measured remote differential pressure within a specified differential pressure range.

Abstract: An apparatus for automatically controlling the flow rate of a fluid (FR) flowing along a duct is disclosed, including a valve element provided with an obturator interposed along a section of the duct, a servo-motor connected to the obturator to allow displacement thereof, and an electronic control unit connected to the servo-motor configured to generate an output signal supplied to the servo-motor. The apparatus also includes an electronic interface module connected to the electronic control unit and external electronic control means. The electronic interface module converts the input signal received by the external electronic control means into an intermediate signal and the electronic control unit converts the intermediate signal into the output signal.