An air conditioner and a control method thereof are provided. The air conditioner includes a sensor portion including at least one sensor, a controller including at least one control portion to control a function of the air conditioner, and at least one processor operatively connected to the sensor and the controller. The at least one processor is configured to obtain an airflow speed and indoor environmental data by the sensor portion while the air conditioner is operating, generate a first algorithm by applying the obtained airflow speed, the indoor environmental data, and pre-stored reference data to a second algorithm, and control operation of the air conditioner based on the generated first algorithm.

A method for calibrating a product valve disposed along a flow path in a duct, with a calibration valve in a duct remote from the product valve and having a geometric shape and operational parameters corresponding to those of the product valve. A calibration controller establishes calibration conditions and, in responsive thereto, generates a calibration flow rate (CFM) function by measuring for the calibration valve, a sparse set of flow rates and determining a surface-fit mathematical representation of fluid flow through the calibration valve over applied calibrated flow rates and the measured pressure drops. The CFM Function is transferred to a product blade controller, which in turn, processes the representation of the mathematical surface, and controls fluid flow through product valve based on values extracted from the received CFM Function as well as at least one parameter control signal indicative of a desired set point.

Greenhouse, comprising a substantially airtight enclosure having an interior space, comprising a crop space in which crops are to be grown, and a climate control chamber configured to control a climate in the crop space, comprising at least one air inlet opening and at least one air outlet opening through which an interior of the chamber is in fluid communication with the crop space, an air displacement means configured to create an air flow from the crop space to the interior of the chamber through the at least one air inlet opening, and from the interior of the chamber to the crop space through the at least one air outlet opening, and an air conditioning means configured to condition air in the interior of the chamber such that a conditioned climate is created in the interior of the chamber, wherein the climate control chamber is configured and located relative to the crop space such that the at least one air inlet opening and the at least one air outlet opening of the climate control chamber are distributed across the crop space such that the chamber both receives and delivers air from and to the crop space, respectively, locally at a plurality of locations distributed across the crop space, and wherein the climate control chamber comprises one or more climate control chambers.

Controlling a switching element in accordance with a voltage output from a signal amplifying circuit enables adjusting a voltage to be received by a current calculation circuit. Even when a range of a air volume to be used is wide and a range of output of a DC motor is wide, or a current flowing through the DC motor has a wide range, a resistance value of a shunt resistor and an amplification factor of a signal amplifying circuit are not required to be reduced, and thus current detection accuracy of the DC motor can be improved.

Air conditioner units and methods for operating air conditioner units are provided. A method includes determining an operational state of each heater bank of a plurality of heater banks of the air conditioner unit, and determining a speed of a blower fan of the air conditioner unit when the operational state of every heater bank is active. The method further includes comparing a blower fan input voltage to a voltage threshold value when the speed is a low speed, and deactivating one of the plurality of heater banks when the blower fan input voltage is less than the voltage threshold value.

Systems and methods for dehumidifying and conditioning air for a commercial building are presented. In one instance, a system involves ventilating a building at a rate higher than the required outdoor airflow rate in order to compensate for the fan being turned off when the compressor is off. Other systems and methods are presented.

A space cleaning system includes: a detection unit configured to detect generation and a generation position of an infectious substance in a space; an airflow control unit configured to generate an airflow towards the generation position detected in response to detection of the generation of the infectious substance; and a cleaning control unit configured to clean the space at least after the generation of the infectious substance is detected.

The present disclosure discloses a fan driving device, and the fan driving device comprises a sensing unit and a processing unit, wherein the sensing unit at least comprises a microwave sensing module; the sensing unit is at least used for sensing whether any human activity exists within the action range based on microwave sensing according to a certain microwave sensing cycle, and outputting a sensing signal to the processing unit periodically; and the processing unit is used for processing the sensing signal, so that the driving device can adaptively control the turn-on and turn-off of the fan and adaptively regulate the working power of the fan. Based on this, a dynamic intelligent fan driving device without a user's turn-on and turn-off action and based on environmental state sensing is realized.

A structure for providing an indoor space includes an air-sterilizing apparatus configured to suction in air existing in the indoor space and to sterilize the suctioned air, a droplet blocking table configured to discharge the sterilized air in a direction toward a table top so as to allow the discharged air to be suctioned in along a central axis of the droplet blocking table, an air-conditioning apparatus configured to move the air suctioned in by the droplet blocking table, and an ordering apparatus configured to perform an order for a menu according to information input from a user.

An air conditioner unit is configured for automatically detecting a restricted duct and adjusting fan speed schedules in response. The air conditioner unit includes an indoor fan including a drive motor for selectively rotating the indoor fan to urge a flow of air through the indoor portion and a controller is configured for sending a control signal to the drive motor to rotate the indoor fan to an actual fan speed. Based on the actual fan speed and a unit voltage, the controller obtains a target control signal, e.g., via a lookup table, and determines that a restricted duct condition exists if the control signal is different than the target control signal. The controller adjusts the operation of the indoor fan in response to determining that the restricted duct condition exists.