BELIMO HOLDING AG

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.

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.

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.

In some aspects, the HVAC field device described herein includes: a housing; an HVAC functional device; a non-volatile memory unit including: a first set of computer-executable instructions in a first memory partition configured to execute an operating system; and a second set of computer-executable instructions in a second memory partition configured to execute an application module, wherein the application module is configured to control operation of the HVAC functional device; a volatile memory unit; and at least one processor configured to: execute the operating system in a first memory region of the volatile memory unit and execute the application module in a second memory region of the volatile memory unit, wherein the application module is prevented from accessing the first memory region of the volatile memory unit.

A heating, ventilation, and air conditioning (HVAC) system for configuring parameters of a plurality of field devices of the HVAC system. The HVAC system includes the plurality of field devices including a first field device and a second field device, a commissioning device including a user interface and a communication interface for receiving parameters from the first field device and for transmitting parameters to the second field device. The user interface displays a reference set of configuration data and/or setting data. The communication interface transmits a target set of configuration data and/or setting data that is based on the reference set of configuration data and/or setting data and includes at least one data element not in common with the reference set of configuration data and/or setting data.

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.

A flow controller for use in a HVAC system includes a control unit for controlling at least one of a flow rate and power of a fluid passing through an opening of a flow regulating element The opening position of an actuator for opening/closing the flow regulating element is adjustable by the control unit. The flow controller is configured for determining a flow entry point position of the actuator. The control unit is configured for applying a first control method for controlling the actuator position when the actuator position is below the flow entry point position, and for applying a second control method for controlling the actuator position when the actuator position exceeds the flow entry point position.

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.

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.