An air conditioner (100), comprising a compressor (110), a reversing assembly (120), an outdoor heat exchanger (130), an indoor heat exchanger (140), an electric control heat sink assembly (150), a unidirectional throttle valve (160) and a throttle component (170). The unidirectional throttle valve (160) comprises a first valve port (161) and a second valve port (162), on the flow direction from the first valve port (161) to the second valve port (162), the unidirectional throttle valve (170) is fully turned on, and on the flow direction from the second valve port (162) to the first valve port (161), the unidirectional throttle valve (170) is a throttle valve.

A heating, ventilation, and air conditioning (HVAC) system for regulating humidity of an enclosed space. The HVAC system includes an evaporator coil. A metering device is fluidly coupled to the evaporator coil. A variable-speed compressor is fluidly coupled to the condenser coil and the evaporator coil and a controller is operatively coupled to the variable-speed compressor. A humidity sensor is operatively coupled to the controller and exposed to the enclosed space. Responsive to a determination that the relative humidity of the enclosed space exceeds the maximum humidity threshold, the controller adjusts a speed of the variable-speed compressor to increase latent capacity of the HVAC system. Responsive to a determination that the relative humidity of the enclosed space falls below the minimum humidity threshold, the controller adjusts a speed of the variable-speed compressor to decrease latent capacity of the HVAC system.

An evaporator rough-in box includes a flat panel having a first score mark by which the flat panel can be folded between a front wall and a top wall of the rough-in box, and a second score mark by which the flat panel can be folded between the front wall and a bottom wall of the rough-in box. The front wall has an opening through which an interior of the rough-in box can be accessed, the opening being covered by a removable cover plate. Left and right ends of the top and bottom walls include extension pieces bendably attached to central portions of the top and bottom walls to form mounting brackets. The central portions include score marks that delineate knock-out holes by which a lineset and a drain line can be installed to the rough-in box. A drain fitting is attached to the knock-out hole of the drain line.

An air conditioning apparatus includes a first refrigerant circuit enclosing a first refrigerant, and a second refrigerant circuit enclosing a second refrigerant. The first refrigerant circuit includes a compressor configured to compress the first refrigerant, an outdoor heat exchanger, an expansion device, and a first flow path through which the first refrigerant passes in an intermediate heat exchanger configured to exchange heat between the first refrigerant and the second refrigerant. The second refrigerant circuit includes a pump configured to increase a pressure of the second refrigerant and transfer the second refrigerant, a second flow path through which the second refrigerant passes in the intermediate heat exchanger, and an indoor heat exchanger. At least one of the first refrigerant and the second refrigerant has a global warming potential lower than that of R32, and the second refrigerant has a lower flammable limit concentration higher than that of the first refrigerant.

An air conditioning apparatus includes a first refrigerant circuit enclosing a first refrigerant, and a second refrigerant circuit enclosing a second refrigerant. The first refrigerant circuit includes a compressor configured to compress the first refrigerant, an outdoor heat exchanger, an expansion device, and a first flow path through which the first refrigerant passes in an intermediate heat exchanger configured to exchange heat between the first refrigerant and the second refrigerant. The second refrigerant circuit includes a pump configured to increase a pressure of the second refrigerant and transfer the second refrigerant, a second flow path through which the second refrigerant passes in the intermediate heat exchanger, and an indoor heat exchanger. At least one of the first refrigerant and the second refrigerant has a global warming potential lower than that of R32, and the second refrigerant has a lower flammable limit concentration higher than that of the first refrigerant.

A mounting bracket assembly includes a support bracket, an outdoor support mounted at the support bracket and configured to be supported by a wall, and a connection member. The support bracket includes a lateral fixation member configured to be fixed to an inner side of a window frame and extending along an extension direction, and a support plate. The lateral fixation member includes a lateral extension member. The lateral extension member includes an extension bottom plate, and a first extension side plate and a second extension side plate disposed at opposite side edges of the extension bottom plate, respectively. One end of the support plate is connected to the lateral fixation member, and another end of the support plate is configured to extend outside the window frame. One end of the connection member is configured to connect to a window air conditioner, and another end of the connection member is provided in the lateral extension member and connected to the extension bottom plate.

A Variable Refrigerant Flow (VRF) dehumidification system. The system has at least one condenser module in fluid communication with one or more indoor air handlers. At least one evaporator coil is in fluid communication with the indoor air handlers and at least one reheat/reclaim coil. The evaporator and reheat/reclaim coils are also in communication with the condenser module. A plurality of electronic expansion valves (EEVs) are in fluid communication with the indoor air handlers. A plurality of sensors is disposed in the system and are in communication with at least one VRF dehumidification system controller. In one embodiment, a logic is stored in a non-transitory computer readable medium that, when executed by one or more processors, causes the VRF dehumidification system to monitor the data input from the plurality of sensors and regulates the capacity of the VRF dehumidification system needed to maintain a set dew point parameter.

A system for air-conditioning and hot-water supply is configured to selectively perform a cooling operation and a heating operation. The system includes: an outdoor unit having a compressor and an outdoor heat exchanger; at least one or more indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit so as to be arranged in parallel to the at least one or more indoor units and including a refrigerant-water heat exchanger; and a controller configured to monitor an occurrence of a request for hot-water supply from the hot-water supply unit during the cooling operation performed at at least one of the indoor units, and then to start the heating operation. The controller is further configured to determine a time point to resume the cooling operation based on at least one of an outdoor temperature and a target temperature of at least one indoor unit in the heating operation.

A system for air-conditioning and hot-water supply is configured to selectively perform a cooling operation and a heating operation. The system includes: an outdoor unit having a compressor and an outdoor heat exchanger; at least one or more indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit so as to be arranged in parallel to the at least one or more indoor units and including a refrigerant-water heat exchanger; and a controller configured to monitor an occurrence of a request for hot-water supply from the hot-water supply unit during the cooling operation performed at at least one of the indoor units, and then to start the heating operation. The controller is further configured to determine a time point to resume the cooling operation based on at least one of an outdoor temperature and a target temperature of at least one indoor unit in the heating operation.

A control method includes acquiring indoor temperatures of a plurality of rooms each having one of a plurality of indoor units of a multi-split air conditioner, identifying a target indoor unit corresponding to a target room in response to the target room satisfying an overheating condition or a supercooling condition, controlling other one or more indoor units of the multi-split air conditioner except for the target indoor unit to be shut down, and switching an operation mode of the target indoor unit.