An arrangement (1) for air management of a room (100) comprises ventilating means (10) for enabling exchange of air between the inside environment (102) of the room (100) and the outside environment (103) of the room (100); a stand-alone air purifier (20), which is arranged separately from the ventilating means (10), and which is adapted to remove pollutants from the air in the inside environment (102) of the room (100); and a control system (30, 31, 32), which is in communication with both the ventilating means (10) and the air purifier (20), and which is adapted to control operation of the ventilating means (10) and the air purifier (20) in dependence of air quality data relating to the inside environment (102) of the room and the outside environment (103) of the room, the control system (30,31,32) being configured to control the ventilating means (10) and the air purifier (20) differently depending on whether the air quality data relating to the outside environment of the room (100) is above or below a predetermined reference. Operation of the arrangement (1) is aimed at optimizing indoor air quality and minimizing energy consumption.

A method for controlling drainage of a dehumidifier includes the following steps. When a compressor of a dehumidifier is powered on, it is detected whether the compressor operates or not. When it is detected that the compressor stops operating, a power device of the dehumidifier is controlled to start draining water off after a first preset period. Operation period of the power device is detected. It is judged whether the operation period reaches a second preset period or not. When it is determined that the operation period reaches the second preset period, the power device is controlled to stop operating. A dehumidifier and a drainage control device thereof are also disclosed.

The present invention is directed toward a movable airborne contaminant control system having a retractable/extendable booth attached in a sealing manner to a ventilation unit, preferably mounted on wheels. The ventilation unit includes a filter assembly that opens into the work are formed by the booth. Front doors support air filters. In operation, the ventilation unit draws air in a longitudinal laminar flow over one or more work pieces. The filter assembly captures both particulates and VOCs to allow the exhaust air to include an extremely low contaminant load.

A combined heating, ventilation, air conditioning, and refrigeration (HVACR) system including an HVAC sub-system and a refrigeration sub-system. The HVAC sub-system is in communication with an open space of an indoor environment and includes a first condenser, a first evaporator, and a first compressor at least partially defining a first refrigerant circuit circulating a first refrigerant for selectively conditioning an airflow within the HVAC sub-system that conditions the open space. The refrigeration sub-system is in communication with an enclosed space within the indoor environment and includes a second condenser, a second evaporator, and a second compressor and at least partially defining a second refrigerant circuit circulating a second refrigerant for selectively conditioning the enclosed space. Heat from the second refrigerant is selectively transferred to the airflow within the second condenser to reheat the airflow prior to the airflow being discharged into the open space.

A control apparatus that controls, based on a temperature of a predetermined space measured by a plurality of temperature sensors associated with a plurality of air conditioning apparatuses, the air conditioning apparatuses so that the temperature of the predetermined space becomes a set target temperature, comprises: an air conditioning controller that performs control such that the air conditioning apparatus operates, and a determiner that causes one of the plurality of air conditioning apparatuses to perform a predetermined operation, and decides a temperature sensor that is fastest in a change rate of the measured temperature among the plurality of temperature sensors as a temperature sensor to be associated with the one air conditioning apparatus.

An air conditioning system includes a housing defining a first airflow path therein between an outside air inlet over a cooling coil and an outlet for delivering outside air from the outside air inlet over the coil to the outlet, a second airflow path between a return air inlet over the cooling coil and to the outlet for delivering return air over the cooling coil, and a third airflow path between the return air inlet and the outlet for delivering return air through the housing without passing over the cooling coil. The system includes outside, return, and bypass air dampers that are sequentially moveable between open and closed positions for directing air through or preventing air from entering the first, second, and third airflow paths, respectively. A controller independently controls the opening and closing of each damper in response to data received from the sensor.

The present technology relates to systems and methods for control of home automation activity based on user preferences. More specifically, the present technology relates to using a home automation system to control home automation activity based on user preferences. Example embodiments include receiving an input from a user including a set of preferences, generating a user profile using the set of preferences, receiving data indicating that a mobile device has moved from a first location to a second location, transmitting the user profile to the mobile device for application to the home automation system, receiving data indicating that the mobile device has been at the second location for a period of time, comparing the period of time to a predetermined threshold period of time, and applying the home automation settings associated with the second location to the home automation system.

A combined heating, ventilation, air conditioning, and refrigeration (HVACR) system including an HVAC sub-system and a refrigeration sub-system. The HVAC sub-system is in communication with an open space of an indoor environment and includes a first condenser, a first evaporator, and a first compressor at least partially defining a first refrigerant circuit circulating a first refrigerant for selectively conditioning an airflow within the HVAC subsystem that conditions the open space. The refrigeration sub-system is in communication with an enclosed space within the indoor environment and includes a second condenser, a second evaporator, and a second compressor and at least partially defining a second refrigerant circuit circulating a second refrigerant for selectively conditioning the enclosed space. Heat from the second refrigerant is selectively transferred to the airflow within the second condenser to reheat the airflow prior to the airflow being discharged into the open space.

The present invention relates to a system and method of HVAC (Heating, Ventilating, Air Conditioning) energy management system. More specially, the present invention provides a system and method that can provide automatic optimized control mechanism for HVAC system to save energy.

Various embodiments of air conditioner units are detailed. Such air conditioner units may use multiple air ventilation chambers arranged on both an indoor and outdoor portion of the air conditioner unit. A through-unit window may be present that permits an unobstructed view through the air conditioner unit between the first air ventilation chamber and the second air ventilation chamber.