A heating ventilation and air conditioning (HVAC) system includes an air handling unit having an outlet, at least one zone operably coupled to the outlet of the air handling unit, and at least one indoor air quality sensor operable to monitor an amount of one or more contaminants. The at least one indoor air quality sensor is arranged within the at least one zone. A controller operably coupled to the at least one indoor air quality sensor is configured to detect the occurrence of a fault or an unsatisfied indoor air quality condition and perform diagnostics to determine the cause of the fault or the unsatisfied indoor air quality condition.

The air condition measurement apparatus according to various embodiments of the present invention comprises: a housing comprising a first space and a second space therein; a light-emitting unit which is positioned inside the housing, comprises a first lens, and radiates light to air flowing into the housing; a light-receiving unit which is positioned inside the housing, comprises a second lens, and receives reflected light formed from the reflection of the radiated light, radiated from the light-emitting unit, by foreign substances included in the air; a blocking member which transmits the radiated light or the reflected light and separates the first space, in which the light-emitting unit or the light-receiving unit is disposed, from the second space; and a control unit, wherein the control unit may be configured to measure the condition of air on the basis of a signal corresponding to the reflected light received by the light-receiving unit. Other various embodiments may be possible.

An object of the present invention is to provide a safety cabinet capable of controlling the purity during usage. In order to realize the object, the safety cabinet is configured to include an operation space including an operation stage; a front panel formed in a front surface of the operation space; an operation opening provided in a lower portion of the front panel; a suction port that is provided in the vicinity of the operation opening on a front side of the operation stage to lead downward; an air circulation path through which air suctioned from the suction port flows along a lower portion, a back surface, and an upper portion of the operation space; a particle counter; an operation space-air intake port provided in the operation space to take air into the particle counter; and an introduction pipe that introduces the air into the particle counter from the operation space-air intake port.

A method for indicating to a user the expected time for an air purifier to achieve a target level of pollution in a room by: (A) acquiring the current level of pollution (CP) in said room; (B) acquiring current air flow speed (CAFS) through said air purifier; (C) comparing the current level of pollution (CP) with a pre-determined target level of pollution (IP); (D) calculating the expected time (T) required to reduce current pollution (CP) to said target level of pollution (IP) at current air flow speed (CAFS); (E) indicating said expected time (T) required to reduce current pollution to said target level of pollution at current air flow speed to a user; and (F) repeating steps (A) to (E).

Provided is an air cleaner, and more specifically, to an air cleaner in which a filter part using a photocatalyst is formed in a module type to facilitate replacement and cleaning and which includes an insert fan which is disposed inward from a suction port of a casing forming an exterior and including the suction port disposed at one side and a discharge port disposed at the other side, and suctions ambient air, a driving motor provided to be axially detachably coupled to the insert fan in a direction from the discharge port, and a suction unit fixing part in which an accommodation space, into which the insert fan and the driving motor are fixedly inserted in the direction from the suction port toward the discharge port and which is finished by inserting a cover member in the direction from the discharge port.

The systems and methods described herein provide for a novel deep learning approach to estimating and predicting faulty mechanical system conditions before they occur without using any measurements from the system itself. Environmental data, such as temperature, humidity, occupancy, volatile organic compounds (VOC), equivalent carbon dioxide (eCO2) and particulate matter may be used in the estimation and prediction of faults, failures, and other inefficiencies within the HVAC system.

An air filtering and treatment apparatus (10), the apparatus (10) including: a housing (12) having an air inlet (14), an air outlet (16), an air passageway (24) between the inlet (14) and outlet (16), and a fan (18) arranged to urge air through the air passageway (24) between the air inlet (14) and the air outlet (16), wherein the housing (12) includes filter (20) arranged to filter air passing through the air passageway (24), and a receptacle (26) located toward the air outlet (16) relative to filter (20). The receptacle (26) is adapted to hold treatment composition (22) such that an evaporable vapour associated with the treatment composition (22) is able to accumulate in a headspace (41) of the receptacle (26), the headspace (41) including at least one aperture (36). The air passageway (24) may be shaped such that air flows substantially perpendicularly past the at least one aperture (36) of the receptacle (26) such that a pre-determined amount of the evaporable vapour is entrained into the filtered air released from the air outlet (16). A system (100) and method are also disclosed.

A building system for a building including one or more storage devices storing instructions thereon that, when executed by one or more processors, cause the one or more processors to operate one or more pieces of building equipment associated with a building space based on a first operating mode. The instructions cause the one or more processors to receive an indication to update operation of the building space based on an emergency situation and responsive to receiving the indication to update operation of the building space based on the emergency situation, operate the one or more pieces of building equipment based on a second operating mode, wherein the second operating mode defines one or more second parameters for the one or more pieces of building equipment and is adapted to reconfigure the operation of the building space to address or mitigate the emergency situation.

Air-cleaning control is performed in accordance with a situation of motion of a person and brightness in a room. An air-cleaning device (100) includes: a first determination unit (11) that determines, from a detection signal from a person detection sensor (31), whether a state of an air-cleaning target room is at least any of a state where a person is absent in the air-cleaning target room, a state where a person is present and a motion amount is small, and a state where a person is present and the motion amount is large; a second determination unit (12) that determines, from a detection signal from as illuminance sensor (32), whether the state of the air-cleaning target room is at least any of a state where it is bright inside the air-cleaning target room and a state where it is dark inside the air-cleaning target room; and an operation control unit (13) that controls an operation of an air-cleaning function by using determination results of the first determination unit (11) and the second determination unit (12).

A hybrid clean room system includes: a clean room which includes a plurality of side walls arranged in the vertical direction between a floor part and a ceiling part; a circulation part which is disposed outside of the clean room, and which forms a closed space along the upper plate with the other two facing side walls from among the plurality of side walls; an air pump disposed in the circulation part; a plurality of discharge ports, which are arranged on the other two facing side walls from among the plurality of side walls so as to supply, to the clean room, the air that is discharged from the air pump and passes through the circulation part; a suction part disposed at at least one of the plurality of side walls, and connected to the air pump.