An air conditioning control system includes: an air pressure measurement unit (111) configured to measure an air pressure value; an air conditioning unit (136) whose wind direction and airflow volume are changeable; a wind velocity calculation unit (132) configured to calculate a wind velocity of wind received by a portable terminal (110) from a variation in a plurality of atmospheric pressure values and to specify a presence direction that is a direction in which the portable terminal (110) is present with respect to the air conditioner (130); an air conditioning control determination unit (134) configured to determine a wind direction and an airflow volume of the air conditioning unit (136) in accordance with the wind velocity and the presence direction; and an air conditioning control unit (135) configured to control the air conditioning unit (136) so that the determined wind direction and airflow volume are obtained.

A dynamic air supply system for controlling ventilation in a clean room, wherein the clean room comprises a clean area subject to contamination, comprising a radiant panel arranged within a ceiling above the clean area, a first air supply diffuser and a second air supply diffuser arranged within the ceiling, a controller coupled with the air supply diffusers for controlling the air supply. The first air supply diffuser and the second air supply diffuser are arranged on opposite sides of the radiant panel. The first air supply diffuser and the second air supply diffuser are arranged to diffuse air flows along the radiant panel and towards clean area. The controller is configured to change the air supply diffusers between nursing mode and normal mode, wherein the supply air volume in normal mode is 10%-65% of the supply air volume in nursing mode.

A dynamic air supply system for controlling ventilation in a clean room, wherein the clean room comprises a clean area subject to contamination, comprising a radiant panel arranged within a ceiling above the clean area, a first air supply diffuser and a second air supply diffuser arranged within the ceiling, a controller coupled with the air supply diffusers for controlling the air supply. The first air supply diffuser and the second air supply diffuser are arranged on opposite sides of the radiant panel. The first air supply diffuser and the second air supply diffuser are arranged to diffuse air flows along the radiant panel and towards clean area. The controller is configured to change the air supply diffusers between nursing mode and normal mode, wherein the supply air volume in normal mode is 10%-65% of the supply air volume in nursing mode.

A method and computing device for inferring an airflow of a controlled appliance operating in an area of a building. The computing device stores a predictive model. The computing device determines a measured airflow of the controlled appliance and a plurality of consecutive temperature measurements in the area. The computing device executes a neural network inference engine using the predictive model for inferring an inferred airflow based on inputs. The inputs comprise the measured airflow and the plurality of consecutive temperature measurements. The inputs may further include at least one of a plurality of consecutive humidity level measurements in the area and a plurality of consecutive carbon dioxide (CO2) level measurements in the area. For instance, the controlled appliance is a Variable Air Volume (VAV) appliance and a K factor of the VAV appliance is calculated based on the inferred airflow.

An air conditioning system and a method for controlling an air conditioning system are provided. The air conditioning system may determine loads for each indoor unit of a plurality of indoor units considering capacities of the plurality of indoor units, a length of an indoor unit pipe connected from a pump to each indoor unit, and map the plurality of indoor units and a plurality of pumps based on the determined loads.

An integrated method for assessing metabolic rate and maintaining indoor air quality and efficient ventilation energy use. A physical sensor assesses room occupancy. An actuated ventilation system is set to a constant CO.sub.2 level in a predetermined healthy range, where the actuated ventilation system includes a CO.sub.2 sensor. The actuated ventilation system sets a first air ventilation rate and the sensor measures a first CO.sub.2 level. The system determines whether CO.sub.2 level is in a healthy range, if not then the CO.sub.2 level is adjusted by setting a subsequent air ventilation rate. A subsequent CO.sub.2 level is measured. If the CO.sub.2 level is determined to meet a predetermined healthy range, then an assessment of change of air ventilation rate (Δ ACH) is determined. The determination of air change rate can be further augmented by a physical pressure based measurement. The overall metabolic rate is generated.

An integrated method for assessing metabolic rate and maintaining indoor air quality and efficient ventilation energy use. A physical sensor assesses room occupancy. An actuated ventilation system is set to a constant CO.sub.2 level in a predetermined healthy range, where the actuated ventilation system includes a CO.sub.2 sensor. The actuated ventilation system sets a first air ventilation rate and the sensor measures a first CO.sub.2 level. The system determines whether CO.sub.2 level is in a healthy range, if not then the CO.sub.2 level is adjusted by setting a subsequent air ventilation rate. A subsequent CO.sub.2 level is measured. If the CO.sub.2 level is determined to meet a predetermined healthy range, then an assessment of change of air ventilation rate (Δ ACH) is determined. The determination of air change rate can be further augmented by a physical pressure based measurement. The overall metabolic rate is generated.

An air purifier for preventing air pollution is disclosed and includes a main body, a gas guider, a filtration and purification component and at least one gas detection module. The main body is configured to form a diversion path. The gas guider is disposed in the diversion path for guiding an air convection. The filtration and purification component is disposed in the diversion path for filtering and purifying an air pollution source contained in the air convection guided by the gas guider. The at least one gas detection module is disposed in the diversion path for detecting the air pollution source and transmitting a gas detection datum.

An air purifier for preventing air pollution is disclosed and includes a main body, a gas guider, a filtration and purification component and at least one gas detection module. The main body is configured to form a diversion path. The gas guider is disposed in the diversion path for guiding an air convection. The filtration and purification component is disposed in the diversion path for filtering and purifying an air pollution source contained in the air convection guided by the gas guider. The at least one gas detection module is disposed in the diversion path for detecting the air pollution source and transmitting a gas detection datum.

A building management system is provided. The building management system includes one or more variable air volume units and a controller. The controller includes a processor and a memory. The memory stores processor executable instruction. The processor executable instruction when executed by the processor cause the building management system to perform functional tests on the one or more variable air volume units of the building management system to generate building data; analyze the building data to produce health information per functional test; and visualize a condition of the building system based on the health information.