An exhaust fan unit of a heating, ventilation, and/or air conditioning (HVAC) system includes an outer fluid path of a nozzle assembly of the exhaust fan unit defined by and between an outer wall of the nozzle assembly and an inner wall of the nozzle assembly, an inner fluid path of the nozzle assembly defined by and radially inward from the inner wall, and a plurality of entrainment ports extending from the outer wall to the inner wall and configured to enable environmental air to pass to the inner fluid path, where each entrainment port includes a bottom surface that tapers downwardly from the inner wall to the outer wall.

An external-air conditioning apparatus and a ventilation system are provided, the external-air conditioning apparatus includes a fin tube type heat exchanger and a housing that stores this heat exchanger. The housing includes a base body that serves as a back side of the apparatus body and a cover body that serves as a front side of the apparatus body, and the base body and the cover body are dividable and detachable in structure. The base body has a base portion, a partitioning portion, a connecting pipe portion, a heat-exchanger-holding structure portion, and a water receiving portion. The cover body is a structure in which a front wall portion and a three-side peripheral wall portion are formed integrally with each other, and a part in which the peripheral wall portion is not formed is an inlet for external air.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.

Example embodiments of the present disclosure relate to a method of commissioning an HVAC system and a related unit. Some embodiments of the method include providing a unit of the HVAC system with a plurality of condensate outlets such that the unit may be installed in a plurality of orientations; installing the unit in a preferred orientation; selecting one of the condensate outlets from the plurality of outlets that is positioned to receive condensate based on the preferred orientation; attaching a condensate line to the selected one of the condensate outlets; and installing a sensor along the condensate line, the sensor configured to detect a presence of a refrigerant that is heavier than air and would flow with gravity along with the condensate collected by the unit.

A heating, ventilation, and air conditioning (HVAC) system includes one or more compressors, one or more outdoor heat exchangers, and one or more indoor heat exchangers. The HVAC system also includes a base pan on which the one or more compressors are mounted. The base pan includes a base level and one or more tier levels higher than the base level. The distance from any point on a perimeter of the first-tier level to a nearest point on a perimeter of the base level is based on the smallest bolt circle diameter of the one or more compressors mounted on the base pan. Also, the perimeter lengths of the tier levels are based on a percentage of the base level perimeter length.

A condensate drain assembly for use with a horizontally oriented multi-poise heat exchanger includes a first drain pan having a first hollow interior configured to receive an apex of the multi-poise heat exchanger therein. The first drain pan has a generally vertical orientation. A second drain pan has at least one second drain and a second hollow interior for receiving condensate therein. The second hollow interior is configured to receive a header of the multi-poise heat exchanger therein. The second drain pan has a generally horizontal orientation and the first hollow interior is fluidly connected to the second hollow interior.

A purification dehumidifier includes a housing, a fan, a dehumidifier assembly, and a purifier assembly. The housing includes an air inlet, a dehumidified air outlet, and a purified air outlet. An air duct in communication with the air inlet, the dehumidified air outlet, and the purified air outlet is formed in the housing. The fan is arranged in the air duct and configured to introduce an airflow into the air duct from the air inlet and blow the airflow in the air duct out from at least one of the dehumidified air outlet or the purified air outlet. The dehumidifier assembly is arranged in the air duct and corresponding to the dehumidified air outlet. The purifier assembly is arranged in the air duct and corresponding to the purified air outlet.

The automatic air conditioner drain system sanitizer may comprise a pump, a controller, a solution reservoir, and a power source. The automatic air conditioner drain system sanitizer may be configured to dispense a drain clearing solution from the solution reservoir into a drain line of an air conditioning system periodically in order to prevent growth of microorganisms within the drain line. The microorganisms may be referred to as white slime and may comprise bacteria, algae, mold, mildew, fungus, or any combination thereof. As non-limiting examples, the drain clearing solution may be white vinegar, bleach, chlorine tablet dissolved in water, or a liquid drain line clearing product. The quantity of the drain clearing solution dispensed and the dispensing interval may be selected and may vary based upon the drain clearing solution used.

The present disclosure relates to an enclosure of a vapor compression system, where a component is disposed within the enclosure. The component is fluidly coupled to the vapor compression system and configured to discharge a flow of fluid. The enclosure includes a hole within a portion of the enclosure and a relief valve disposed within the hole of the enclosure, where the relief valve is configured to discharge the flow of fluid in a first direction through a passage within the relief valve. The passage extends from an interior region of the enclosure to an environment external of the enclosure. The relief valve is configured to block a second flow of fluid through the passage in a second direction, where the second direction is opposite of the first direction.

A heat exchanger element has a heat-conducting body and a heat-transfer fluid pipe embedded in ducts having a channel-shaped locating section and two tabs connected flat to the heat-conducting body. To produce the heat exchanger element, foil strips are pressed into grooves so that they each form a section pressed into the grooves in a channel-like manner and laterally projecting tabs. A building panel has a heat exchanger element with a heat exchange surface, a cooling device and a collecting device, the cooling device being designed to cool the heat exchange surface in contact with the ambient air to a temperature below the dew point of the water vapour in the ambient air.