In a construction method of an air conditioning system, the respective rooms are provided with air intake sections 9a to 9d, 18a to 18d which spout air sent from blowers 40a to 40d, 41a to 41d, an exhaust section 52 which forms discharged air current directed from the respective rooms toward the return compartment is provided between the respective rooms and the return compartment, and the plurality of blowers 40a to 40d, 41a to 41d and at least one air conditioner are disposed in the return compartment. Air discharged from the plurality of rooms in the building 1 by the air conditioner 30b operated by the return compartment is adjusted in temperature and moisture in the return compartment, and wind is sent into the plurality of rooms in the building 1 by the blowers 40a to 40d, 41a to 41d, and air conditioning in the building 1 can be performed.

A heating, ventilation, and/or air conditioning (HVAC) system includes a refrigerant circuit configured to circulate refrigerant. The circuit includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a reversing valve that transitions between a first configuration to direct the refrigerant from the compressor toward the outdoor heat exchanger and a second configuration to direct the refrigerant from the compressor toward the indoor heat exchanger. The system includes a compensator with a conduit that is part of the refrigerant circuit and configured to pass the refrigerant therethrough and a chamber disposed about the conduit. The chamber is also communicatively coupled to the refrigerant circuit, and configured to retain a portion of the refrigerant in the chamber. A coil assembly plate of the indoor heat exchanger or the outdoor heat exchanger includes a receptacle configured to receive the refrigerant charge compensator.

Variable airflow energy efficient HVAC systems can be used to provide for a three duct air supply, a multi-zone air supply, and a two duct air supply. The systems include an air handling unit that defines a cooling circuit portion and an independent heating/bypass circuit portion. The two circuit portions may each have variable air dampers for admitting variable amounts of ambient and return air, and/or the cooling circuit portion and the heating/bypass circuit portion may each have an active cooling element. Corresponding methods are also disclosed.

Variable airflow energy efficient HVAC systems can be used to provide for a three duct air supply, a multi-zone air supply, and a two duct air supply. The systems include an air handling unit that defines a cooling circuit portion and an independent heating/bypass circuit portion. The two circuit portions may each have variable air dampers for admitting variable amounts of ambient and return air, and/or the cooling circuit portion and the heating/bypass circuit portion may each have an active cooling element. Corresponding methods are also disclosed.

A central air conditioning and heat pump system includes a main heat exchange system and a cooling arrangement. The main heat exchange system includes a compressor, a first heat exchanger, a second heat exchanger. The cooling arrangement includes a cooling tower and a condensing unit. When the central air conditioning and heat pump system is selectively operated in an air conditioning mode, refrigerant may be cooled both by water and ambient air in the condensing unit and the second heat exchanger respectively.

A method is disclosed comprising drawing air into a robotic vapor device via a pump, exposing the drawn air to a sensor, determining a concentration of one or more constituents of the drawn air via the sensor, dispensing a vapor from the robotic vapor device based on an air treatment protocol, and engaging a filtration element based on the air treatment protocol.

A building management system includes (i) one or more building systems including equipment configured to serve one or more spaces in a building and (ii) one or more circuits. The one or more circuits are configured to receive an input to invoke a control strategy to modify a condition of the one or more spaces; define an output of the control strategy where the output relates to a modification that impacts at least one of a location, an equipment type, or a point type; perform a query to identify one or more points associated with the output where the one or more points are defined in terms of at least one of the location, the equipment type, or the point type; and automatically modify one or more values of the one or more points to implement the control strategy.

This disclosure relates generally to cabinets for commercial heating, ventilation, air conditioning and refrigeration (HVACR) systems. More particularly, this disclosure relates to HVACR cabinets including one or more plenum fans located in a fan box. The fan box may be located between an indoor coil and a heat exchanger compartment of an HVACR unit. The fan box may be configured to direct air into a heat exchanger compartment inlet. The fan box may be parallel with or angled with respect to the indoor coil.

An apparatus that includes a supply duct and a return duct fluidly coupled to the supply duct. A first evaporator is disposed between the supply duct and the return duct. A second evaporator is disposed between the supply duct and the return duct. A fresh-air intake is disposed between the supply duct and the return duct upstream of the first evaporator and the second evaporator. A first plurality of dampers are disposed upstream of the first evaporator. A second plurality of dampers are disposed upstream of the second evaporator. A divider panel is disposed between the first evaporator and the second evaporator. The divider panel directs air egressing the first plurality of dampers across the first evaporator and air egressing the second plurality of dampers across the second evaporator.

A device providing automatic control of temperature for an environment of a working station includes an air box, a baffle member, and a driving assembly. The air box is coupled to a machine defining a working space which the working station is in. The air box defines an opening. The opening allows cooling air to be introduced into the working space. The baffle member is slidably coupled to the air box at the opening. The driving assembly coupled to the baffle member drives the baffle member to cover the opening completely, to cover the opening partially, or to leave the opening uncovered in accordance with a difference between a current temperature of the working space and a desired target temperature of the working space. A related system and method are also disclosed.