Abstract: An air conditioner according to the disclosure includes a blowing fan including a suction port, a bell mouth formed along a circumferential direction of the suction port, and a fan guard extending from an inner circumferential surface of the bell mouth and covering the suction port, wherein the fan guard includes a plurality of annular ribs arranged concentrically with a gap from a center of the fan guard corresponding to a rotation axis of the blowing fan, the plurality of annular ribs includes a first annular rib adjacent the outermost edge of the fan guard and the first annular rib is arranged to be inclined to the rotation axis in a direction corresponding to the tangent line of the bell mouth.

Abstract: A heat exchanger includes heat exchange fins, refrigerant pipes are arranged across the heat exchange fins, and connecting pipes connected to the refrigerant pipes to thereby define refrigerant passages. The connecting pipes include a first pipe portion having a first end connected to one of the refrigerant pipes, a branch pipe portion that is branched from the first pipe portion, that extends parallel to the first pipe portion, and that is connected to another of the refrigerant passages, and a second pipe that is connected to the first pipe portion and that is configured to guide gas-phase refrigerant separated from the refrigerant in the first pipe portion. The second pipe includes an inner insert portion inserted into a second end of the first pipe portion and an outlet portion that extends from the inner insert portion in direction opposite to the second end of the first pipe portion.

Abstract: An outdoor heat exchanger includes: a main heat exchange area; a sub heat exchange area; and a connecting pipe and a connecting pipe interconnecting the main heat exchange area and the sub heat exchange area. The main heat exchange area has a main heat exchange channel and a main heat exchange channel. The sub heat exchange area has a sub heat exchange channel, a sub heat exchange channel, and a sub heat exchange channel. The connecting pipe connects the sub heat exchange channel and the sub heat exchange channel to the main heat exchange channel while the sub heat exchange channels are joined together. The connecting pipe interconnects the sub heat exchange channel and the main heat exchange channel.

Abstract: A refrigerant can tap with a tap body having an inlet and an outlet, an internal pin, a gasket, and a backflow preventer. The inlet and outlet of the tap body have a one-half inch ACME left-handed thread, the inlet for engaging the self-sealing valve of an R-1234yf can.

Abstract: The invention concerns a device for distribution of a refrigerant fluid in a header of a heat exchanger comprising at least two conduits (12, 13), an external conduit (12) and an internal conduit (13), with the internal conduit accommodated in the external conduit in such a manner as to form a volume (14) for communication between the internal conduit and the external conduit, the external conduit comprising spraying orifices (120) each having an axis (120A) intersecting a principal lengthwise axis (12A) of the external conduit, the internal conduit comprising at least one communication orifice having an axis intersecting a principal lengthwise axis of the internal conduit. According to the invention, the internal conduit (13) comprises a portion (16) of reduced thickness formed by removal of material from an external face of the internal conduit (13), the external face facing toward the external conduit (12).

Abstract: This refrigeration apparatus (1) comprises a main refrigerant circuit (2) including a positive displacement compressor (4), a condenser (6), an expansion valve (8), an evaporator (10), through which a refrigerant circulates successively in a closed loop circulation, and a lubrication refrigerant line (18) in fluid connection with the main refrigerant circuit (2) and connected to the compressor (4) for lubrication of said compressor (4) with the refrigerant. The refrigeration apparatus (1) comprises a refrigerant container (20) connected between the condenser (6) and the expansion valve (8), said refrigerant container (20) being configured to retain a quantity of refrigerant, the lubrication refrigerant line (18) being connected to said refrigerant container (20). The refrigeration apparatus (1) further comprises heating means (28) for heating the refrigerant contained in the refrigerant container (20).

Abstract: An outdoor unit of an air-conditioning apparatus includes: a bottom plate having a drain hole formed therein to discharge drain water generated in a heat exchanger; a heater provided at an upper surface of the bottom plate; a heater fixing tool provided to fix the heater to the bottom plate, with the heater interposed between the heater fixing tool and the upper surface of the bottom plate; a screw fastened after inserted into a screw hole from above to fix the heater fixing tool to the bottom plate, the screw hole being provided in overlapping portions of the heater fixing tool and the bottom plate; and a protective cap configured to cover a tip of the screw from below, which projects downwards from a lower surface of the bottom plate. The screw hole is located in a surrounding area which surrounds the drain hole, and the heater fixing tool is fixed to the bottom plate in the surrounding area.

Abstract: A HVAC system refrigeration circuit is provided. Embodiments of the present disclosure relate to a refrigeration circuit configured to balance the oil carryover between multiple compressors using a single refrigeration circuit. Embodiments of the present disclosure allow for the use of one or more inverter compressors and one or more fixed speed compressors. Embodiments of the present disclosure utilize capillary tubes or other flow control methods to balance the oil carryover between multiple compressors.

Abstract: A heat exchanger unit includes: a first heat exchanger including a first header, a second header, and a first flat pipe group that includes first flat multi-hole pipes connected to each of the first header and the second header; and a second heat exchanger: disposed in parallel with the first heat exchanger on an air downstream side, from the first heat exchanger, of air flow generated by a fan; and including a third header, a fourth header, and a second flat pipe group that includes second flat multi-hole pipes connected to each of the third header and the fourth header. The fourth header causes a refrigerant that flows in from the third header to flow out to the first header.

Abstract: Provided are a separator with improved oil separation efficiency, and a refrigeration cycle apparatus including the separator. The separator includes an inflow pipe portion, an oil storage portion, an oil return pipe portion, and an outflow pipe portion. The inflow pipe portion includes a swirling portion that defines a flow direction of refrigerant so as to swirl the refrigerant. The oil storage portion is connected to the inflow pipe portion. The oil return pipe portion is connected to a vertically lower side of the oil storage portion. The outflow pipe portion includes an opening end that faces the swirling portion. The outflow pipe portion extends from a region that faces the swirling portion to the outside of the oil storage portion. The opening end is configured such that the refrigerant discharged from the swirling portion can directly flow thereinto.

Abstract: Outdoor units for climate control systems and related methods are disclosed. In an embodiment, the outdoor unit includes a base pan including an upper surface, a lower surface opposite the upper surface, and at least one receptacle, wherein the at least one receptacle comprises an aperture. Additionally, the outdoor unit includes at least one coil locator coupled to the at least one receptacle of the base pan wherein the at least one coil locator comprises a tongue which extends through the aperture and a pair of horizontally spaced feet separate and distinct from the tongue and which are received in the aperture. Further, the outdoor unit includes a heat exchanger coil, and an outdoor fan configured to produce an airflow across the heat exchanger coil.

Abstract: A multi-slab microchannel heat exchanger is disclosed. The heat exchanger includes a first slab having a first inlet header and a first outlet header, a second slab including a second inlet header and a second outlet header, a first inlet connector fluidly connected to the first inlet header, a first outlet connector fluidly connected to the first outlet header, a second inlet connector fluidly connected to the second inlet header, and a second outlet connector fluidly connected to the second outlet header. The first slab and the second slab are arranged successively in a direction along a length of the heat exchanger. The first inlet connector, the first outlet connector, the second inlet connector, and the second outlet connector are disposed at a same end of the heat exchanger.

Abstract: A compressor system includes a first compressor and a second compressor. A suction equalization line fluidly couples the first compressor and the second compressor. A first branch suction line is fluidly coupled to the first compressor and a second branch suction line is fluidly coupled to the second compressor. A main suction line is fluidly coupled to the first branch suction line and the second branch suction line. An obstruction device is disposed in at least one of the first branch suction line and the second branch suction line. Responsive to deactivation of at least one of the first compressor and the second compressor, the obstruction device is at least partially closed thereby causing prescribed liquid levels in the first compressor and the second compressor during partial-load operation.

Abstract: A heat exchanger, such as a flooded evaporator, comprises a shell extending along a longitudinal axis (X), an inlet pipe and an outlet pipe, through which respectively enters (F1) and exits (F2) a refrigerant flow, and a bundle of pipes crossing the shell along the longitudinal axis (X), and comprising a refrigerant flow diffuser provided inside the shell downstream the inlet pipe, the refrigerant flow diffuser extending along the longitudinal axis (X) and comprising openings through which the refrigerant flows. The refrigerant flow diffuser comprises a moving element and a stationary element, the moving element being movable with respect to the stationary element under action of a pressure force (FP) exerted by the refrigerant flow so that the refrigerant flow going through the openings is adjusted and a differential refrigerant pressure between refrigerant pressure downstream (P2) and upstream (P1) the refrigerant flow diffuser is kept constant.

Abstract: A heat exchanger includes a fin body and a heat pipe having a first portion disposed on or at least partially within the fin body and a second portion extending from the fin body, wherein the heat pipe includes a hollow core filled with a heat pipe working fluid having a liquid phase that is configured to transition to gas and to be returned to the liquid phase at an operational temperature of the heat exchanger.

Abstract: A vapor chamber structure includes a main body having multiple internal independent chambers. A capillary structure is disposed in each of the independent chambers. A working fluid is contained in each of the independent chambers. The working fluids contained in the independent chambers have different physical or chemical properties. The independent chambers are respectively in contact with different heat sources with different properties to conduct the heat. Accordingly, one single vapor chamber structure can provide complex heat conduction effect for different heat sources.

Abstract: A panel restrictor for a heating, ventilation, and/or air conditioning (HVAC) unit includes a first bracket configured to couple to a structural support of the HVAC unit, where the first bracket includes a slot. The panel restrictor includes a second bracket configured to couple to a panel of the HVAC unit. An arcuate segment extends from the second bracket and is configured to extend through the slot. The panel restrictor also includes an engager configured to secure the arcuate segment within the slot at a plurality of discrete positions along the arcuate segment.

Abstract: A refrigerating cycle apparatus is equipped with a plurality of outdoor units, each of which includes at least one high-pressure type compressor with refrigerant and lubricating oil stored therein. A discharge pipe of the respective compressor is connected to a main discharge pipe for jointly discharging refrigerant and oil to the indoor unit. A suction pipe of the respective compressors is connected for returning the refrigerant and the oil from the indoor unit to the compressor. Each outdoor unit comprises a first oil balancing circuit connected between a side surface of the casing of the respective compressor and the main discharge pipe for allowing a flowing-in of the exceeding oil from the casing of the compressor. In another embodiment, each outdoor unit may include a second oil balancing circuit connected between a side surface of the casing of the respective compressor and the main suction pipe.

Abstract: A heat exchanger includes: a plate-like fin having one end and an other end in a first direction; and a first heat transfer tube and a second heat transfer tube that each extends through the fin and that are adjacent to each other in a second direction. A portion to which the fin and the first heat transfer tube are connected and a clearance portion that separates between the fin and the first heat transfer tube are disposed between the fin and the first heat transfer tube. The clearance portion is disposed at one end side in the first direction relative to an imaginary center line that passes through a center of the first heat transfer tube in a long side direction and that extends along a short side direction.

Abstract: An auxiliary heat exchange unit of a heat exchanger has a first auxiliary heat exchange region and a second auxiliary heat exchange region. A main heat exchange unit has a first main heat exchange region, a second main heat exchange region, a third main heat exchange region, and a fourth main heat exchange region. The auxiliary heat exchange unit and the main heat exchange unit are configured to cause refrigerant to flow successively through the first auxiliary heat exchange region, the second auxiliary heat exchange region, the first main heat exchange region, the second main heat exchange region, the fourth main heat exchange region, and the third main heat exchange region when the heat exchanger functions as an evaporator.