Thermal monitoring and analysis of conditions in a power electronic system include sensing of thermal parameters of interest, such as temperature and humidity in an enclosure housing power electronic components. The components are cooled by a liquid coolant flow from a chiller through chiller plates associated with the power electronic components. Air is circulated through the enclosure for heat rejection from the chiller plates. Based on the sensed parameters, factors such as relative humidity and dew point of the cooling air may be computed and evaluated to determine the potential for condensation. Alarms, notices, or recommendations may be output for regulation of the chiller to avoid condensation. The system may also provide for evaluation of installation errors, and degradation of performance over time.

A humidity measuring device is equipped with a temperature and humidity measurement unit including a temperature sensing element that measures temperature and a humidity sensing element that measures humidity, a casing having an accommodating section in which the temperature and humidity measurement unit is accommodated, and a supply tube that supplies a gas at a measurement location into the accommodating section, and a display unit having a display device, and which is fixed to the casing. The display unit further includes a display control unit that controls the display device to thereby cause the display device to display at least one of the humidity of the gas measured by the humidity sensing element, or a dew point temperature of the gas calculated based on the temperature of the gas measured by the temperature sensing element, and the humidity of the gas measured by the humidity sensing element.

A droplet range control system includes a first obtainer that obtains environment information indicating at least wind speed in a space, wind direction in the space, temperature in the space, humidity in the space, or spatial scale, a second obtainer that obtains target information indicating positions and directions of faces of a first target and a second target in the space, an estimator that estimates a range of droplets from the first target on a basis of the environment information and the target information, and a controller that, if a respiration area of the second target exists within the range, conditions an environment in the space such that the respiration area gets out of the range.

The disclosed technology includes devices and systems for an economizer of a heating ventilation and air conditioning (HVAC) system. The disclosed technology can include an economizer for an HVAC system comprising a housing, an air inlet extending through a wall of the housing, a sliding door configured to transition between a closed position and an open position, and a controller configured to cause the sliding door to transition between the closed position and the open position based on temperature data. The sliding door can comprise a first portion forming a barrier and a second portion comprising at least one aperture. In the closed position, the first portion can align with the air inlet and substantially prevent ambient air from moving through the air inlet. In the open position, the second portion can align with the air inlet and permit the ambient air to move through the air inlet.

A heating, ventilation, and/or air conditioning (HVAC) system includes a first condenser coil of a refrigerant circuit, wherein the first condenser coil is configured to receive a first refrigerant flow from a compressor of the refrigerant circuit, a modulating valve of the refrigerant circuit, and control circuitry communicatively coupled to the modulating valve. The modulating valve is configured to receive a second refrigerant flow from the compressor and configured to direct the second refrigerant flow to a second condenser coil of the refrigerant circuit and to a reheat coil of the refrigerant circuit in a parallel flow arrangement, and the control circuitry is configured to operate the modulating valve to apportion the second refrigerant flow between the second condenser coil and the reheat coil based on a detected operating parameter of an air flow directed across the reheat coil.

An air conditioning control system includes a casing including paths through which air passes, dampers arranged at an entrance and an exit of each of the paths and operated to open or close the entrance and the exit according to a control signal, a heat and mass exchanger including a hygroscopic material for absorbing moisture and arranged across the paths to be rotated with respect to the casing, a driving unit rotating the heat and mass exchanger, a heat exchange unit having a heat transfer medium flowing inside the heat exchange unit and arranged on at least one of the paths, and a controller opening or closing the entrance and the exit of the paths by applying a control signal to the dampers, and changing a rotation speed of the heat and mass exchanger by applying a control signal to the driving unit, according to operation modes.

When heating is being performed, and a temperature detected by a temperature sensor is lower than a first determination value, a controller opens the flow rate control valve corresponding to a heat exchanger, of the third heat exchangers, to which a request for air conditioning has not been made, and closes the flow rate control valve corresponding to a heat exchanger, of the third heat exchangers, to which the request for air conditioning has been made. When heating is being performed, and the temperature detected by the temperature sensor is higher than a second determination value, the controller opens the flow rate control valve corresponding to the heat exchanger to which the request for air conditioning has been made, and closes the flow rate control valve corresponding to the heat exchanger to which the request for air conditioning has not been made.

An exhaust fan for a space is provided. The exhaust fan includes a vent and a plurality of blades. The exhaust fan further includes a fan motor operatively coupled to the plurality of fan blades. The fan motor is configured to drive rotation of the plurality of fan blades to draw air within the space through the vent. The exhaust fan includes a microphone and a sensor. The sensor is configured to detect one or more parameters of the air. The exhaust fan further includes one or more control devices. The one or more control devices are configured to obtain, via the one or more microphones, audio data indicative of one or more voice commands associated with controlling operation of the fan motor. The one or more control devices are further configured to control operation of the fan motor based, at least in part, on the audio data.

A smart artificial intelligence based mobile robot having an air purification, humidification, dehumidification, and ultraviolet cleaning-based system to remove pathogens is disclosed. The robot also acts as an emergency alert system for break-ins and human fall detection using AI algorithm. The mobile robot operates and navigates intelligently using real time data collected from the environment through various sensors and input devices. An object detection module may use inputs from the camera to recognize people, pets, and others by pre-trained machine learning data set. The mobile purification, humidity management and sanitizing robot includes a ball bearing for balance and a motor controller, which drives two motors and wheels. The central controller of the smart mobile robot system has memory and processor to handle navigation, communication, notifications, and air handling system through real time data collection.

A method is provided for controlling an HVAC system. The method includes receiving zone priority levels and zone temperature setpoints, where at least one of the zones haves a higher priority level than others of the zones, receiving an indication of zone ambient temperature values, determining requested zone capacity values to maintain the zone ambient temperature values within a threshold deviation of respective ones of the zone temperature setpoints, determining target zone capacity values from the requested zone capacity values and zone size values, and from the zone priority levels where the target zone capacity values may be responsive to a total of the requested zone capacity values that is less than a minimum capacity or greater than a maximum capacity of the HVAC system, and causing the HVAC system to provide the conditioned air to the zones according to respective ones of the target zone capacity values.