A multi-type air conditioner is provided including an outdoor unit and a plurality of indoor units connected to the outdoor unit by a liquid pipe and a gas pipe. The plurality of indoor units includes a first indoor unit including first and second heat exchangers and first and second heat exchanger connecting pipes, and a second indoor unit. An indoor heat exchanger connecting pipe connects the first and second indoor units, and a liquid pipe connecting tube connects the first indoor unit and the liquid pipe. Opening amounts of a first indoor expansion valve, and first and second bypass expansion valves provided in the first indoor unit are opened selectively to operate the first heat exchanger as a condenser and the second heat exchanger as an evaporator to continuously drive a dehumidification mode while maintaining a room temperature within a predefined range.

A multi-connection air conditioning system and a method for calculating a heat exchange amount thereof includes a plurality of indoor units, and the method includes: obtaining a total heat exchange amount of the multi-connection air conditioning system; obtaining inlet air temperature of each indoor unit; obtaining a two-phase saturation temperature of each indoor unit; obtaining an air supply volume of each indoor unit; obtaining a heat exchange area of each indoor unit; and calculating a heat exchange amount of each indoor unit according to the total heat exchange amount of the multi-connection air conditioning system, the inlet air temperature of each indoor unit, the two-phase saturation temperature of each indoor unit, the air supply volume of each indoor unit, and the heat exchange area of each indoor unit. Thus the user can monitor the heat exchange amount of each indoor unit so that they can be managed with separate targets.

A control method for an air conditioning system includes: calculating an average heat exchange amount of a coil according to real-time operation information; setting a full-load air volume parameter and a full-load water volume parameter in a heat exchange model according to the real-time operation information and the heat exchange model, and calculating a full-load heat exchange amount; calculating a dynamic margin value based on the average heat exchange amount and the full-load heat exchange amount; determining whether the dynamic margin value is greater than a first preset condition or less than a second preset condition, so that the controller outputs a first control signal or a second control signal respectively to adjust a coil water inlet temperature; and when the dynamic margin value is less than the first preset condition and greater than the second preset condition, maintaining the current setting state.

In an air conditioner of the present embodiment capable of selecting either a fan rotation speed determined on the basis of a static pressure value and an air volume or a required fan rotation speed, motor control means determines, on the basis of the static pressure Pt, the fan rotation speed Rm of a fan motor that provides the air volume Av required by the user, and transmits the determined fan rotation speed Rm to an indoor unit control means. When the fan rotation speed Rm received from the motor control means is a prohibited rotation speed, the indoor unit control means transmits a correction fan rotation speed different from the prohibited rotation speed to the motor control means, and the motor control means drives the fan motor at the received correction fan rotation speed.

An air conditioner including a heat exchanger; a blower fan; a compressor; and a controller. The controller performs: a cooling process in which the compressor is operated to compress a circulating refrigerant, the heat exchanger performs heat exchange between the refrigerant and air, and the blowing fan is operated to blow air to the heat exchanger. The controller performs a drying process including: performing, a blowing process in which the blower fan is operated to blow air to the heat exchanger while the compressor is stopped, and performing a heating process in which the refrigerant is circulated in a direction that is changed from that of the cooling process, the blower fan is operated to blow air to the heat exchanger, and the compressor is operated to compress the refrigerant, thereby heating the surface of the heat exchanger and drying water condensed on the surface of the heat exchanger.

A dedicated outside air-conditioning system (DOAS) that may automatically generate variable subcooling refrigerant delivered to the evaporator; and modulate hot discharge gas to reduce the relative humidity of the discharge air from the DOAS. The DOAS may include fluid control valves configured to regulate delivery of the refrigerant in order to seamlessly flex between maximum latent capacity (minimum discharge dewpoint) and maximum sensible capacity (minimum leaving air discharge dry bulb temperature) to match load and/or ventilation air requirements.

A heating, ventilation, or air conditioning (HVAC) system for a building includes HVAC equipment configured to provide heating or cooling to one or more building spaces and one or more controllers. The one or more controllers include one or more processing circuits configured to generate energy targets for the one or more building spaces using a thermal capacitance of the one or more building spaces to which the heating or cooling is provided by the HVAC equipment, generate setpoints for the HVAC equipment using the energy targets for the one or more building spaces to which the heating or cooling is provided by the HVAC equipment, and operate the HVAC equipment using the setpoints to provide the heating or cooling to the one or more building spaces.

A method for controlling cold storage of an air conditioner includes acquiring an ambient temperature around the air conditioner and a pipe temperature of an exhaust pipe of a compressor of the air conditioner, acquiring a target opening degree corresponding to a current cold storage mode of the air conditioner according to the ambient temperature and the pipe temperature, and adjusting an opening degree of a throttle device of the air conditioner to be the target opening degree. The throttle device is arranged at a pipe between a cold storage box of the air conditioner and a condenser of the air conditioner.

For controlling an orifice of a valve (10) in an HVAC system (100) to regulate the flow (Φ) of a fluid through a thermal energy exchanger (2) of the HVAC system (100) and adjust the energy transfer rate ({dot over (Q)}) of the thermal energy exchanger (2) in response to a demand value (d), the orifice of the valve (10) is controlled in a first mode of operation where the flow (Φ) of the fluid through the thermal energy exchanger (2) is regulated within efficiency constraints on the energy transfer rate ({dot over (Q)}) with respect to an efficiency threshold value. Upon receiving an override signal (OS), the orifice of the valve (10) is controlled in a second mode of operation where the flow (Φ) of the fluid through the thermal energy exchanger (2) is not regulated with respect to the first efficiency threshold value.

An air conditioner indoor unit, comprising a casing, and a fan casing, an electric heating assembly and a heat exchanger assembly which are disposed in the casing. The fan casing has a return air inlet and an air outlet, the electric heating assembly and the heat exchanger assembly are both disposed at the air outlet of the fan casing, and the electric heating assembly is located between the fan casing and the heat exchanger assembly. Further disclosed are an air conditioner control method, an air conditioner, and a storage medium. Since the electric heating assembly is disposed at the air outlet of the fan casing and between the fan casing and the heat exchanger assembly, the fan casing and the heat exchanger assembly can isolate a fire source that may be generated by the electric heating assembly when the electric heating assembly has a blow or other accident.