A heating, ventilation, and air conditioning (HVAC) system actuator including a stator magnet and a rotor magnet. The rotor magnet turns an axle connected to an airflow door such that rotation of the axle moves the door and generates waveforms. The number of waveforms generated corresponds to how much the axle has rotated. The stator magnet is magnetized to a saturated state, thereby providing the waveforms with a consistent shape that is consistently detectable by a climate control pulse count module.

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).

A Fluid Flow Control System (FFCS) door assembly includes a continuous belt and a plurality of rollers. The plurality of rollers support the continuous belt and define a first segment, a second segment, a third segment, and a fourth segment. The continuous belt includes a plurality of openings that selectively allow fluid flow to pass through the first segment, the second segment, the third segment, and the fourth segment when two openings of the plurality of openings align with the first segment, the second segment, the third segment, or the fourth segment.

A retrofit damper system is configured for installation in existing ductwork including a duct supplying conditioned air through a register boot to a register vent. The retrofit damper system includes a damper assembly including a damper blade and a damper motor configured to drive the damper blade between a closed end position and an open end position. A control module includes a control module housing and a controller within the control module housing that is configured to regulate operation of the damper motor. The controller outputs a drive signal that causes the electric damper motor to drive the damper blade to the desired position and creates a plurality of interruptions in the drive signal while driving the damper blade. A sense circuit senses back EMF signal, and the controller estimates a blade position based at least in part on the back EMF signals.

A printed wiring board includes a primary circuit that receives power supply of a high voltage from a high power source; a pattern for a low voltage circuit that is used when a low voltage component used for a low voltage lower than the high voltage and a power supply terminal block that receives power supply of the low voltage from a low power source are provided; a pattern for a common circuit that is used when a high voltage component used for the high voltage and the low voltage that insulates the pattern for the primary circuit from the pattern for the common circuit; a first insulator which insulates the pattern of the primary circuit from the pattern of the common circuit; and a second insulator that insulates the pattern for the common circuit from the pattern for the low voltage circuit.

A building ventilator to provide a supply of air into a building comprises an external inlet port and a separate external outlet port and an internal inlet port and a separate internal outlet port to allow respective airstreams to flow into and out of the ventilator respectively at an exterior and at an interior of the building; a heat exchanger mounted in the flow paths between the external and internal inlet and outlet ports. The ventilator is configured to drive an airflow from the external inlet port through the heat exchanger and out of the ventilator via the internal outlet port; and to drive an airflow from the internal inlet port through the heat exchanger and out of the ventilator via the external outlet port. The ventilator comprises a heating element mounted in the air flow path between the external inlet port and the heat exchanger.

In a known indoor unit, a casing may move away from a wall surface and a gap may be formed between the casing and the wall surface, with the result that the design of the indoor unit may be deteriorated. An indoor unit includes a mounting board fixed to a wall surface and a bottom frame (casing) attached to the mounting board. The bottom frame (casing) has screw holes (screw fixing portions) for fixing the bottom frame (casing) to the wall surface of the room.

A regulating flap reduction gear for an electrically driven regulating flap for regulating a gas or liquid volume flow includes two parallel bearing plates between which gear parts are rotatably arranged. A plurality of spacers keep the two bearing plates at a distance from one another. The plurality of spacers are designed as tabs of one, first bearing plate, which are bent by 90° from the plane of the first bearing plate and have at least one lateral projection. The tabs are inserted with their free tab ends into plug-in openings of the other second bearing plate until their at least one lateral projection rests against the second bearing plate.

A hygiene management device for an entrance space is proposed. In the hygiene management device, an air discharger for discharging air toward the bottom of an entrance space operates within a predetermined angle range in an entering/exiting direction of a person, and air to be discharged through a discharge hole of the air discharger is guided to an air guide unit. A plurality of vanes are installed in a row in the air guide unit to control the direction of the air to be discharged through the discharge hole.

Disclosed herein is an air conditioner capable of guiding air in a desired direction with an adjusted speed without marring the appearance to solve the above-described problems. An air conditioner comprising a ceiling-embedded type indoor unit configured to discharge air into an indoor room through an air outlet simultaneously sucking indoor air through an air inlet, wherein a air conditioner comprises, a main flap configured to guide a direction of air discharged from a air outlet in a preset direction, and a sub-flap configured to guide the direction of air between the main flap and the sub-flap in the preset direction, wherein a length of a main flap in a direction where air flows is longer than that of the sub-flap in the direction where air flows.