An air conditioner includes a housing including an inlet and an outlet, and a blade rotatably provided to open and close the outlet. A blade drive device is connected to one end of the blade in a longitudinal direction of the blade to rotate the blade. A blade support unit is configured to rotatably support the other end of the blade in the longitudinal direction of the blade. The blade support unit includes a coil spring configured to apply torque to the blade and a blade holder is coupled to the other end of the blade. A first coupler is coupled to the coil spring, and is configured to penetrate the coil of the coil spring. A case is configured to accommodate the first coupler of the blade holder and is mounted to the housing. The air conditioner is capable of reducing deformation and noise in a blade.

A device configured to operate a Heating, Ventilation, and Air Conditioning (HVAC) system and to receive an audio signal from a microphone while operating HVAC system. The device is further configured to generate a representation of the audio signal, to compare one or more audio signatures to the representation of the audio signal, and to determine that an audio signature from among the one or more audio signatures is not present within the representation of the audio signal. The device is further configured to determine a fault type that is associated with the audio signature that is not present within the representation of the audio signal, to identify a component identifier for a component of the HVAC system that is associated with fault type, and to output the component identifier.

An appliance hub for use in an upper portion of an enclosure can include a substrate configured to be positioned in an upper portion of an enclosure. The appliance hub can include a climate control apparatus mounted on the substrate and the climate control apparatus can be configured to regulate a temperature within the enclosure. The appliance hub can include one or more lighting elements configured to provide light within the enclosure, a plurality of fluid lines connected to the substrate and configured to provide fluid service and return to the climate control apparatus, and/or a plurality of electrical connections connected to the substrate and configured to provide electrical power and/or data to at least one of the climate control apparatus and the one or more lighting elements.

Methods, systems, and devices for monitoring air quality and controlling air purification in an environment are described herein. The method can include receiving from a device a plurality of air quality parameters for the environment and receiving an indication representing a potential change in occupancy in the environment. In response to the indication of a potential change in occupancy, the method can include determining an air quality target that is based at least in part on at least one air quality parameter in the plurality of air quality parameters and the potential change in occupancy. The air quality parameter can be representative of the quality of air to be achieved in the environment for the change in occupancy. The method can include transmitting instructions to control purification in the environment based at least in part on the air quality target.

A device that can accurately detect clogging of a filter and that has a simple structure is provided. A device for measuring clogging of a filter in an air conditioner (2) having a blower (30) that blows gas (40), (42) through a duct (10) and a filter (20) that is provided in the duct (10) and filters dust floating in the gas, comprises a device (26) for measuring a sound pressure that is provided in the duct (10), a data processor (70) that extracts data on the sound pressure at a specific frequency from the data on the sound pressure that have been measured by means of the device (26) for measuring a sound pressure, and an estimating device (70) that estimates clogging of the filter based on the data on the sound pressure at the specific frequency that have been extracted by means of the data processor (70).

An environmental control equipment control apparatus controls an environment of a target space using a plurality of environmental control equipment. The control apparatus includes a receiver and an electronic controller. The receiver may receive state information relating to states of a plurality of subject persons. In this case, the electronic controller controls a plurality of kinds of environmental control equipment such that the state information of the plurality of subject persons received by the state information receiver satisfies a predetermined target state condition. The receiver may receive a second environmental stimulus given to a subject person other than a first environmental stimulus caused by control of the environmental control equipment. In this case, the electronic controller controls the environmental control equipment such that an influence of the second environmental stimulus received by the environmental stimulus receiver on the subject person is cancelled or reduced.

Systems, devices, and methods are provided for monitoring air in an indoor space. An example system includes at least one sensor located in the indoor space to generate monitoring data, a communication interface, and a processor connected to the communication interface and in communication with the at least one sensor. The at least one sensor includes at least a carbon dioxide sensor or a particle sensor. The processor is operable to receive monitoring data for an extended time period, which includes at least one period when the indoor space is occupied and at least one period when the indoor space is unoccupied. The processor is operable to identify at least one region of interest in the monitoring data; and determine an air change rate for the indoor space based on the region of interest. The processor can be further operable to determine an occupancy or an airborne infection risk based on real-time monitoring data.

A device is configured to operate a Heating, Ventilation, and Air Conditioning (HVAC) system. The device is further configured to determine that the amount of time to close a pressure switch exceeds a time threshold value. The device is further configured to receive an audio signal from a microphone while operating the HVAC system and to determine that an audio signature for a combustion air inducer is not present within the audio signal. The device is further configured to determine whether an audio signature for an integrated furnace controller is present within the audio signal. The device is further configured to determine a fault type based on the determination of whether the audio signature for the integrated furnace controller is present within the audio signal, to identify a component identifier for a component of the HVAC system associated with fault type, and to output a recommendation identifying the component identifier.

The present invention provides an intelligent air shield formation device, having a plurality of nozzles are configured to discharge purified air towards ground, detecting a body region of the detected person, generating region information, controlling the plurality of nozzles corresponding to the region information, generating movement information based on a speed of movement of the body region, controlling the shape of the region information to be deformed based on the movement information.

An integrated device in an HVAC system is configured to modify an environmental condition of a building. The device includes a valve configured to regulate the flow of fluid through a conduit, an actuator comprising a motor and a drive device, and a communications mechanism. The communications mechanism is configured to receive a flow rate setpoint from an external control device of an outer control loop. The device further includes a processing circuit. The processing circuit is configured to determine an actuator position setpoint using a cascaded feedback control mechanism based on the flow rate setpoint and a flow rate measurement from a flow rate sensor of an inner control loop. The valve, the actuator, the communications mechanism, and the processing circuit are located within a common integrated device chassis.