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 system according to an embodiment may include an outdoor unit including a compressor; at least one distributor connected to the outdoor unit and including a condenser and an evaporator that exchange heat between a refrigerant and water with each other; a plurality of heating pipes in communication with the condenser; a plurality of cooling pipes in communication with the evaporator; a plurality of fan coil units connected to the heating pipes or the cooling pipes; and a controller configured to perform a heating pipe search operation for matching a portion of the plurality of fan coil units with the plurality of heating pipes, and a cooling pipe search operation for matching another portion of the plurality of fan coil units with the plurality of cooling pipes, in parallel.

The temperature adjustment apparatus includes a first pipe, a second pipe, the second pipe being branched into a first branch pipe and a second branch pipe, the first branch pipe and the second branch being thereafter merged again, a second heat exchanger in which heat is exchanged between the heating medium that flows through the first branch pipe and the heating medium that flows through the first pipe, and a flow rate regulator configured to change a flow rate of the heating medium that flows through the first branch pipe and a flow rate of the heating medium that flows through the second branch pipe. The second pipe is a pipe configured to supply the heating medium from the heat source apparatus to the indoor heat exchanger and the first pipe is a pipe configured to return the heating medium from the indoor heat exchanger to the heat source apparatus.

The amount of refrigerant to be charged in a refrigerant circuit of an air conditioner is set to a range defined by a lower-limit charge amount and an upper-limit charge amount. The lower-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of a supercooling heat exchanger when a cooling operation is performed under an overload condition in which the refrigerant is hardly condensed in an outdoor heat exchanger that functions as a condenser. On the other hand, the upper-limit charge amount is a charge amount with which a refrigerant supercooling degree is 0 deg and a refrigerant quality is 0 at a refrigerant outlet side of the outdoor heat exchanger when the cooling operation is performed under a rated condition.

A split liquid desiccant air conditioning system is disclosed for treating an air stream flowing into a space in a building. The split liquid desiccant air-conditioning system is switchable between operating in a warm weather operation mode and a cold weather operation mode.

An air conditioning system that includes at least one indoor unit that uses water as a working fluid, an outdoor unit that uses a refrigerant as a working fluid, the outdoor unit including a compressor compressing the refrigerant and an outdoor heat exchanger for heat-exchange with the refrigerant, and a heat collection unit connecting the at least one indoor unit to the outdoor unit, the heat collection unit including at least one heat exchange part for heat-exchanging water supplied from the at least one indoor unit with the refrigerant supplied from the outdoor unit.

A refrigerant detection device that can be used in common in device models having different structures, and an indoor unit of an air-conditioning apparatus that uses the refrigerant detection device. The refrigerant detection device and the indoor unit of the air-conditioning apparatus include a refrigerant-detection air passage having both ends connected to a main air passage extending from a suction port of the indoor unit of the air-conditioning apparatus to an air outlet of the indoor unit, and a refrigerant detection sensor that detects refrigerant in the refrigerant-detection air passage.

An air conditioner indoor unit is provided. The air conditioner indoor unit includes: a base module, having a base part which is arranged with a fan motor; a heat exchange module having a heat exchanger and a connection pipeline for connecting the heat exchanger to an air conditioner outdoor unit; the heat exchanger and the connection pipeline are arranged in such a way that in a mounted state, the heat exchanger and the connection pipeline are entirely located at a front side of the base module; an air and water duct module having an air duct assembly; the air duct assembly is suitable to be entirely disassembled from the base part without disassembling the fan motor in the base part. During mounting, pre-assembly is first performed and then general assembly is performed; in such manner, the time needed to assemble the whole unit may be reduced.

An air conditioner includes: a first heat exchanger configured to perform a first process of cooling air-conditioning air by heat-exchange water; a second heat exchanger configured to perform a second process of cooling the air-conditioning air by the heat-exchange water; a first water passage configured to cause the heat-exchange water to flow through the first heat exchanger and then flow through the second heat exchanger; a second water passage branching off from the first water passage and configured to cause the heat-exchange water that has been used in the first process to flow in a manner to bypass the second heat exchanger; a first water regulating valve configured to adjust performance of the first heat exchanger in the first process; a second water regulating valve configured to adjust performance of the second heat exchanger in the second process; and an air conditioner control device configured to adjust the air-conditioning air.

A heating and cooling system or installation for heating or cooling air within a building space, including a water chiller for chilling water and a coil to which the chilled water can be delivered. Air can then be driven by a fan through the coil to cool the air and the cooled air can be delivered into the building space for cooling the building space. The system can include a water heating facility to heat water that is delivered to the coil so that air driven through the coil can be heated. The coil is connected to ducting for delivering cooled or heated air to the building space.