A system for fault detection and diagnostics of equipment. The system may also be capable of disaggregation and/or virtual submetering of energy consumption by equipment, such as that of heating, ventilation and air conditioning, lighting, and so forth, in a building. Vibration and current sensors, along with one or more algorithms, may be utilized for fault detection and diagnostics of equipment. Models may be developed to aid in deducing energy consumption of individual components of equipment, and the like, for a building.

Disclosed are an air conditioning indoor unit and an air conditioner. The air conditioning indoor unit includes a housing and a ventilator in the housing. The housing has a frame and a panel. The panel defines a first ventilation opening, and the frame defines a second ventilation opening corresponding to the first ventilation opening. The ventilator is communicated with the second ventilation opening. The air conditioning indoor unit further includes a sealer disposed at the second ventilation opening and configured to seal a gap between the frame and the ventilator and/or to seal a gap between the frame and the panel.

Disclosed are an air conditioning indoor unit and an air conditioner. The air conditioning indoor unit includes a housing and a ventilator in the housing. The housing has a frame and a panel. The panel defines a first ventilation opening, and the frame defines a second ventilation opening corresponding to the first ventilation opening. The ventilator is communicated with the second ventilation opening. The air conditioning indoor unit further includes a sealer disposed at the second ventilation opening and configured to seal a gap between the frame and the ventilator and/or to seal a gap between the frame and the panel.

Disclosed are a fresh air assembly (100), an air conditioner indoor unit, and an air conditioner. The fresh air assembly (100) includes a fresh air housing (10) and a fresh air motor (30). The fresh air housing (10) includes a mounting holder (13), the mounting holder (13) has a clamp space (13a), and a surface of the mounting holder (13) away from the clamp space (13a) is defined with a reinforcement rib (1311); and the fresh air motor (30) is mounted in the clamp space (13a).

Disclosed are a fresh air assembly (100), an air conditioner indoor unit, and an air conditioner. The fresh air assembly (100) includes a fresh air housing (10) and a fresh air motor (30). The fresh air housing (10) includes a mounting holder (13), the mounting holder (13) has a clamp space (13a), and a surface of the mounting holder (13) away from the clamp space (13a) is defined with a reinforcement rib (1311); and the fresh air motor (30) is mounted in the clamp space (13a).

A dehumidification system for use with a dehumidification refrigerant to dry ambient air as part of a heating, ventilation, and air-conditioning (“HVAC”) system that includes an HVAC condenser as part of an HVAC refrigeration circuit. The dehumidification system may include a dehumidification refrigeration circuit separate from the HVAC refrigeration circuit. The dehumidification circuit may include a dehumidification compressor, a dehumidification condenser, a dehumidification expansion device, and a dehumidification evaporator. The dehumidification condenser may be positioned in close proximity to the HVAC condenser such that airflow across the HVAC condenser also flows across the dehumidification condenser. The dehumidification evaporator may be spaced apart from the dehumidification condenser such that airflow across the dehumidification evaporator does not flow across the dehumidification condenser.

An air conditioner may include an outdoor unit including a compressor and an outdoor heat exchanger configured to heat exchange compressed refrigerant; an indoor unit having an air inlet and an air outlet and connected with the outdoor unit through a first pipe through which refrigerant discharged from the compressor flows and a second pipe through which refrigerant discharged from the outdoor heat exchanger flows; a blowing fan disposed in the indoor unit; a main heat exchanger configured to heat exchange air, which flows inside through the air inlet, and connected with the second pipe; a reheat exchanger disposed downstream of the main heat exchanger and connected with the first pipe; and a waste heat exchanger disposed upstream of the main heat exchanger and configured to heat-exchange air, which flows inside through the air inlet, and condensate water, which is produced at the main heat exchanger, with each other. Accordingly, air flowing inside through the air inlet is primarily cooled before exchanging heat through the main heat exchanger, whereby the cooling and dehumidifying performance is improved.

An air terminal device for a ventilation system includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The air terminal device further includes a cover plate to control and change the open area of the outlet openings. The outlet openings are in a wall of the pressure box forming an outlet surface of the pressure box. The cover plates are arranged to make contact with and slide relative the outlet surface while changing the open area of the outlet openings. The cover plate is located on the high pressure side of the outlet surface. The cover plate cooperates with the outlet surface such that there is at least one outlet opening or suction opening being partly or fully covered by the cover plate also when the air terminal device is set to maximum flow.

An air terminal device for a ventilation system includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The air terminal device further includes a cover plate to control and change the open area of the outlet openings. The outlet openings are in a wall of the pressure box forming an outlet surface of the pressure box. The cover plates are arranged to make contact with and slide relative the outlet surface while changing the open area of the outlet openings. The cover plate is located on the high pressure side of the outlet surface. The cover plate cooperates with the outlet surface such that there is at least one outlet opening or suction opening being partly or fully covered by the cover plate also when the air terminal device is set to maximum flow.

In a system for air-conditioning interior spaces of a building which are connected via at least one exhaust air duct, one or more interior spaces are provided with an air-conditioning unit which has a inlet line of outdoor air, which supplies inlet air or circulating air to the interior space or spaces, and which is connected to a fluid circuit of a heat pump. The exhaust air duct and a further fluid circuit of the heat pump are connected to an energy store installed outside the building, wherein the energy store is connected to a heat exchanger in a liquid reservoir for energy transfer and for energy storage, which is connected via the heat exchanger to another fluid circuit of the heat pump, the exhaust air being directed into the liquid reservoir via a heat exchanger.