An air conditioning system includes an inlet duct, supply duct, return duct and exhaust duct: a heat exchanger for providing heat transfer between air from the inlet duct and air from the return duct: a cooling coil position in the supply duct: a pan for collecting condensate from the cooling coil; a pump to pump condensate from the pan: and a sprayer coupled to the pump, the sprayer spraying condensate into an air path to increase efficiency of the air conditioning system.

A cooling system includes an evaporator coil and a compressor fluidly coupled to the evaporator coil. A circulation fan is arranged to direct air through the evaporator coil and through a discharge air duct into a conditioned space. At least one sensor is disposed in at least one of the discharge air duct, the conditioned space, and the evaporator coil. An HVAC controller is electrically coupled to the at least one sensor and electrically coupled to the compressor. The HVAC controller is configured to receive a measurement of an HVAC parameter from the at least one sensor, determine if the HVAC parameter indicates frost formation on the evaporator coil, and, responsive to a determination that the HVAC parameter indicates frost formation on the evaporator coil, raise a saturated suction temperature of the evaporator coil.

Provided is a refrigerant cycle apparatus capable of suppressing detects caused by iodine even when a refrigerant containing iodine is used. An air conditioner includes a refrigerant circuit through which a refrigerant containing iodine circulates. The refrigerant circuit includes a component that is in contact with a refrigerant containing iodine, the component being made of metal other than aluminum or an aluminum alloy, or having a content of aluminum which is equal to or less than a ratio at which corrosion of aluminum occurs by iodine. The component is at least one of a component of a compressor, a component of a heat-source-side heat exchanger or a utilization-side heat exchanger, a component of an expansion valve, a drier, and a connection pipe.

A system and method of freeze protection for a chiller including a metering device in flow communication with a condenser, a controller in electrical communication with the metering device, wherein the controller is configured to determine whether the difference between the fluid characteristic of the first liquid and the fluid characteristic of the second liquid is greater than a freezing limit, and enter a freeze protection mode if the difference between the fluid characteristic of the first liquid and the fluid characteristic of the second liquid is greater than the freezing limit.

In an embodiment, a method of preventing evaporator coil freeze in a heating, ventilation and air conditioning (HVAC) system is performed by a controller in the HVAC system. The method includes determining a reference saturated suction temperate (SST) via a sensor disposed in relation to an evaporator coil in the HVAC system. The method also includes determining whether the reference SST is below a minimum SST threshold. The method also includes, responsive to a determination that the reference SST is below the minimum SST threshold, increasing a discharge air temperature (DAT) setpoint.

A valve device includes a case having an opened bottom portion and a receiving space formed therein, a base plate covering the open bottom of the case, a flow-in pipe coupled to the base plate to bring in a refrigerant, a boss installed to the base plate and including a plurality of refrigerant flow-in/out holes through which the introduced refrigerant flows in/out, a plurality of flow-in/out pipes coupled to the plurality of refrigerant flow-in/out holes and through which the introduced refrigerant flows in/out, and a pad arranged on the boss and including an open cavity formed therein to selectively opening one of the plurality of refrigerant flow-in/out holes and a connection cavity formed therein to selectively connecting two of the plurality of refrigerant flow-in/out holes.

A valve device comprises a case comprising an open lower portion and an accommodation space formed therein, a base plate to cover the open lower portion of the case, an inlet pipe connected to the base plate and through which a refrigerant is introduced to the accommodation space, a boss installed to the base plate and comprising a plurality of refrigerant inlet and outlet holes through which the introduced refrigerant from the accommodation space is introduced and discharged, a plurality of inlet and outlet pipes respectively connected to the plurality of refrigerant inlet and outlet holes, and through which the refrigerant is introduced from the boss or discharged to the boss, and a pad comprising an open cavity formed therein to selectively open one refrigerant inlet and outlet hole, and a connection cavity formed therein to selectively connect two refrigerant inlet and outlet holes.

There is provided a refrigerant cycle apparatus capable of suppressing, even when a refrigerant containing CF.sub.3I is used, corrosion of a component of a refrigerant circuit due to the refrigerant containing CF.sub.3I. A refrigerant cycle apparatus includes a refrigerant circuit in which a refrigerant containing CF.sub.3I circulates, the refrigerant circuit including a compressor, an expansion valve, an outdoor heat exchanger, and an indoor heat exchanger that are connected to each other. The refrigerant circuit includes a component to be in contact with the refrigerant. At least a surface of the component to be in contact with the refrigerant is formed by a corrosion resistance material that contains at least one or more selected from a metal in which the percentage of zinc is 10 wt % or less, a resin other than nylon 66, and carbon.

A thermoelectric assembly includes a thermoelectric module having a hot side and a cold side, where a heat sink is coupled with the hot side of the thermoelectric module and a cold sink is coupled with the cold side of the thermoelectric module. A gasket is disposed between the heat sink and the cold sink and extends around a portion of the thermoelectric module. A vapor barrier is attached to and covers an outer surface of the gasket to prevent water vapor from penetrating the outer surface of the gasket.

A method of operating a refrigeration system. The method includes operating a multi-temperature refrigeration system that has a plurality of heat absorption heat exchangers in a single temperature mode. A number of the plurality of heat absorption heat exchangers are determined that require defrosting a single heat absorption heat exchanger is directed into a different operational state when the number of heat absorption heat exchangers that require defrosting is equal to one. E of the plurality of heat absorption heat exchangers is directed into a defrost mode when the number of heat absorption heat exchangers that requires defrosting is more than one.