A split air conditioner having an indoor unit and an outdoor unit. A piping system interconnects the indoor unit with the outdoor unit. The indoor unit has an indoor heat exchanger for cooling or heating air in the indoor unit. The outdoor unit has a compressor, a first outdoor heat exchanger, and a second outdoor heat exchanger. The compressor is configured to drive a refrigerant via the first outdoor heat exchanger and the second outdoor heat exchanger in a refrigerant circuit. The piping system is configured to circulate an energy transport media from the first outdoor heat exchanger via the piping system to the indoor heat exchanger.

An apparatus for delivering circulating water includes a cooling/warming controller configured to perform heat exchange of circulating water supplied to a cooling/warming apparatus using a refrigerant; an indoor-unit controller configured to perform heat exchange of circulating water supplied to an indoor unit using the refrigerant; and a mode change unit (MCU) configured to control a flow of the refrigerant supplied to the cooling/warming controller and the indoor-unit controller according to an operation mode of the cooling/warming apparatus and the indoor unit. The cooling/warming controller and the indoor-unit controller may be configured to share a circulating water passage through which the circulating water moves.

A blower device includes a Coanda effect fluid flow amplifier having a suction opening, an outlet opening to provide an amplified fluid flow, an inner passage along an amplifier central axis passing through the suction opening and the outlet opening. An inlet conduit inputs pressurized fluid into the inner passage for drawing the ambient fluid from the suction opening to the outlet opening by Coanda effect, achieving amplified flow. A diffuser downstream of the amplifier includes diffuser side walls that delimit a diffuser inner side surface extending about a diffuser central axis arranged along the amplifier central axis and terminates with a first flow inlet open end facing the outlet opening, and an opposite second flow outlet open end delivers further amplified fluid flow. At least one side opening is upstream of the second flow outlet open end to allow additional ambient fluid to be sucked into the diffuser.

The present disclosure is directed to a single compressor HVAC system with hot gas reheat. The system includes a single compressor, a pair of condensers, a reheat heat exchanger, an evaporator, and an expansion device. Within the system, the refrigerant exiting the compressor is separated into two portions. In the cooling mode, the first and second portions of the refrigerant are directed from the compressor through the two condensers in parallel. In the reheat mode, the first portion of the refrigerant is directed through the first condenser, while the second portion of the refrigerant is directed through the reheat heat exchanger. The system also may include a head pressure control device that is designed to maintain the compressor discharge pressure within a desired range by adjusting the condenser fan speed.

An air conditioning apparatus 1 includes a compressor (321), an indoor heat exchanger (242) that is a use-side heat exchanger that exchanges heat with first air (F1), an outdoor heat exchanger (323) that is a heat-source-side heat exchanger that exchanges heat with second air, a refrigerant, a first duct (209), and a casing (230). The refrigerant contains at least 1,2-difluoroethylene, and circulates in the compressor (321), the indoor heat exchanger (242), and the outdoor heat exchanger (323) to repeat a refrigeration cycle. The first duct (209) supplies the first air (F1) to a plurality of rooms in an interior. The casing (230) includes a use-side space (SP2) that is connected to the first duct (209) and that accommodates the indoor heat exchanger (242). The casing (230) is configured to allow the first air (F1) after heat exchange with the refrigerant at the indoor heat exchanger (242) to be sent out to the first duct (209).

A convection/radiation air conditioning terminal and an air conditioning system are provided. The convection/radiation air conditioning terminal includes a heat pipe. One end of the heat pipe is connected to a first heat exchange pipeline, and the other end of the heat pipe is connected to a second heat exchange pipeline. The heat pipe includes multiple first microchannels which are arranged and independent of each other, and multiple second microchannels which are arranged and independent of each other, where the first microchannels and the second microchannels are arranged and independent of each other. The first microchannels are each internally provided with a first heat exchange working medium, and the second microchannels are each internally provided with a second heat exchange working medium.

An HVAC system includes a single compressor, a pair of condensers, a reheat heat exchanger, an evaporator, and an expansion device. Within the system, the refrigerant exiting the compressor is separated into two portions. In the cooling mode, the first and second portions of the refrigerant are directed from the compressor through the two condensers in parallel. In the reheat mode, the first portion of the refrigerant is directed through the first condenser, while the second portion of the refrigerant is directed through the reheat heat exchanger. The system also may include a head pressure control device that is designed to maintain the compressor discharge pressure within a desired range by adjusting the condenser fan speed.

An air-conditioning apparatus includes a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, a heat-source-side expansion device, and a circuit-circuit heat exchanger are connected via a refrigerant pipe and refrigerant circulates, and a heat medium circuit in which a pump, the circuit-circuit heat exchanger, a load-side expansion device, and a load-side heat exchanger are connected via a heat medium pipe and a heat medium circulates. The air-conditioning apparatus includes a radiator that is connected to the heat medium pipe and a control unit that is attached to the radiator. The circuit-circuit heat exchanger exchanges heat between the refrigerant circulating in the refrigerant circuit and the heat medium circulating in the heat medium circuit. The control unit is cooled via the radiator by the heat medium flowing in the heat medium pipe.

An air conditioning apparatus includes: an outdoor unit configured to circulate refrigerant; an indoor unit configured to circulate water; a heat exchange device that connects the indoor unit to the outdoor unit and that is configured to perform heat exchange between the refrigerant and the water; and a plurality of pipes and valves. The heat exchange device includes first and second heat exchangers. The air conditioning apparatus is configured to perform a cooling operation or a heating operation based on operating one or both of the first heat exchanger and the second heat exchanger and one or more of the valves.

An air conditioning apparatus includes: an outdoor unit configured to circulated refrigerant; a first pipe and a second pipe that are connected to the outdoor unit; an indoor unit configured to circulate water; and a heat exchange device that connects the outdoor unit to the indoor unit. The heat exchange device includes a first heat exchanger and a second heat exchanger that are each configured to perform heat exchange between the refrigerant and the water, a plurality of connection pipes, a bypass pipe configured to guide the refrigerant passing through the first heat exchanger to the second heat exchanger, and a bypass valve installed at the bypass pipe.