Abstract: A heat source unit of a refrigerant cycle apparatus includes a compressor, a pipe, and a fixing member. The compressor includes two or three connection portions of a first connection portion connecting a suction pipe, a second connection portion connecting a discharge pipe, and a third connection portion connecting an injection pipe. The pipe includes a vertical portion. At least a part of the vertical portion extends vertically from each of the two or three connection portions. The fixing member fixes at least two of the vertical portions of two or three of the pipes of the suction pipe, the discharge pipe, and the injection pipe. Each of the connection portions of the pipes fixed by the fixing member is located on a first straight line as seen in a top view.

Abstract: The refrigerant circuit includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a second flow path switching unit. The outdoor heat exchanger has a plurality of first flat heat transfer tubes, a plurality of second flat heat transfer tubes, and a plurality of third flat heat transfer tubes. The second flow path switching unit switches the refrigeration cycle apparatus between a third state and a fourth state. In the third state, the plurality of first flat heat transfer tubes and the plurality of third flat heat transfer tubes are sequentially connected in series. In the fourth state, the plurality of first flat heat transfer tubes, the plurality of second flat heat transfer tubes, and the plurality of third flat heat transfer tubes are connected in parallel to each other.

Abstract: The present disclosure relates to a heat exchanger and an air conditioner including the same. The heat exchanger may be provided for heat exchange between refrigerant and air. The heat exchanger may include a plurality of refrigerant tubes that are disposed with a clearance (C) therebetween in a first direction (A), in which the air moves, and are disposed to be spaced apart in a second direction (B) crossing the first direction (A) and a plurality of heat exchange fins that are disposed between the plurality of refrigerant tubes disposed to be spaced apart in the second direction (B).

Abstract: A conical refrigerant coil comprises a plurality of pipes, each pipe arranged in a conical spiral and each pipe comprising a plurality of loops. At least some of the loops of each pipe of the plurality of pipes are arranged alternatingly along at least a portion of a length of the coil.

Abstract: A modular arrangement for use in vapor-compression refrigeration system includes an evaporator, oil separator, condenser and oil cooler, arranged inside an outer casing with a longitudinal cylindrical shell and the end plates in both ends of the shell. The shell includes three separate parts, separated from each other by arranging first and second partition walls between the parts. The first part includes the evaporator, the second part includes the oil separator and the third part includes the oil cooler and the condenser. The third part including a combination of the oil cooler and the condenser is constructed by arranging one plate pack into the third part, which is divided two functional plate pack parts by an intermediate plate arranged between the heat exchange plates of the plate pack. The first plate pack part functions as oil cooler and the second plate pack part functions as the condenser.

Abstract: A mixing device and a vapor compression system incorporating a mixing device are provided. The vapor compression system includes a suction line, at least two compressors, and at least one mixing device that is predominantly open (e.g., i.e., include at least a certain percentage, such as seventy percent (70%), of voids/openings). The suction line is used for transferring a working fluid made up of a mixture of a refrigerant and an oil. The suction line includes at least one inlet (e.g., for receiving the working fluid) and at least one outlet (e.g., for distributing the working fluid). The vapor compression system include a first compressor fluidly connected to a first outlet and a second compressor fluidly connected to a second outlet. At least one mixing device is disposed within the suction line (e.g., to increase an internal turbulence of the working fluid).

Abstract: A multi-air conditioner for heating/cooling operations, including at least one indoor unit for heating/cooling operations including an indoor heat exchanger; and an outdoor unit for heating/cooling operations including a compressor, an outdoor heat exchanger, and a switching unit configured to be disposed in a discharge side of the compressor to switch a flow of refrigerant. The outdoor unit includes a receiver that selectively stores refrigerant or oil according to a cooling or heating operation mode and provides the stored refrigerant or oil to the compressor. Accordingly, in the accumulator of the multi-air conditioner using the receiver, the receiver which is not used in the heating mode may be converted and used for oil storage, thereby preventing oil burnout without adding structure.

Abstract: A refrigeration system comprising an evaporator, and a method of operating a refrigeration system. The evaporator comprises: a first fluid volume upstream of a second fluid volume, and a plurality of channels fluidly connecting the first fluid volume and the second fluid volume. The system further comprises a flow restrictor arranged to prevent fluid flow through at least a first channel of the plurality of channels in response to a pressure difference between the first fluid volume and the second fluid volume being less than a predetermined threshold, and to permit fluid flow through the first channel in response to the pressure difference being greater than the predetermined threshold.

Abstract: A vapor compression method and system including: a compressor configured to circulate a working fluid and operate at a plurality of operating conditions; an evaporator in fluid communication with the compressor, the evaporator heat exchanger comprising: a shell configured to allow the working fluid to flow therethrough; a plurality of parallel-spaced tubes disposed within the shell, the plurality of parallel spaced tubes configured to allow a heat transfer fluid to flow therethrough; and at least one baffle operably coupled to the plurality of parallel-spaced tubes, the at least one baffle configured to divide the shell into at least two chambers; an expansion valve assembly in fluid communication with the evaporator; and a control device operably coupled to the compressor and the expansion valve assembly, the control device configured to operate the valve assembly based at least in part on the plurality of operating conditions.

Abstract: An evaporator unit includes an evaporator comprising an evaporation pipe and a plurality of heat exchange fins, through which the evaporation pipe penetrates, and a defrost heater mounted below the evaporator. The defrost heater may include a heating line and a heating pipe in which the heating line is accommodated, and the heating pipe may have a plurality of irregularities extending in a longitudinal direction of the heating pipe.

Abstract: A system for a heat pump that allows the heat pump to work efficiently in extreme cold weathers. The system includes an evaporator influid communication with an expansion valve, the expansion valve can receive a liquid refrigerant from a condenser of the heat pump. The evaporator contains a pool of liquid refrigerant and an electric resistance heating source dipped in the pool of liquid refrigerant. The electric resistance heating source can heat the liquid refrigerant of the pool to generate vapors and thus maintaining a desired pressure within the heat pump.

Abstract: Disclosed is a refrigerant processing unit (1) for evaporating a refrigerant. The refrigerant processing unit (1) comprises a recirculation container (2) and a refrigerant inlet (3) connected to the recirculation container (2) for leading liquid refrigerant into the recirculation container (2). The refrigerant processing unit (1) also comprises a flooded evaporator heat exchanger (4) arranged to heat the liquid refrigerant to generate a phase change of the refrigerant from a liquid phase to a gaseous phase and a standpipe (5) extending between a liquid refrigerant outlet (6) of the recirculation container (2) and an evaporator inlet (28) of the flooded evaporator heat exchanger (4).

Abstract: A plate heat exchanger includes heat transfer plates having openings at four corners thereof, having outer wall portions at their edges, and stacked together. The heat transfer plates are partially brazed together such that a first flow passage for first fluid and a second flow passage for second fluid are alternately arranged, with a heat transfer plate interposed between these flow passages, the openings communicating with each other, forming a first header allowing the first fluid to flow into and out of the first flow passage and a second header allowing the second fluid to flow into and out of the second flow passage. One heat transfer plate located between the first or second flow passage is formed by stacking two metal plates. Space between the metal plates includes a fine flow passage located within a heat exchange region, and a peripheral leakage passage outward of the fine flow passage.

Abstract: A water-cooled heat exchanger with oil separator having integrated refrigerant distribution, the oil separator, including: an exterior shell having opposite end walls defining a first interior, and a first and second opening fluidly communicative with the first interior; a plurality of baffles operably coupled to and extending from at least a first opposite end wall, each baffle including a first support member generally parallel to a second support member, each operably coupled in a generally perpendicular orientation, to at least the first opposite end wall, and a crossmember operably coupled between a first and second support member, the crossmember having a width dimension that is less than the width of the first support member and the second support member, forming an orifice between the crossmember and the at least first opposite end wall; and a distributor integrated within the exterior shell to define a second interior within the first interior.

Abstract: An air conditioner may include a compressor that compresses refrigerant; a condenser that condenses the refrigerant; at least one expansion valve that expands the refrigerant; a gas-liquid separator that separates and discharges the refrigerant into gas refrigerant and liquid refrigerant; an evaporator that evaporates the liquid refrigerant discharged from the gas-liquid separator; a refrigerant inflow pipe that connects the expansion valve and the gas-liquid separator; a bypass pipe that connects the gas-liquid separator and the compressor; and a refrigerant discharge pipe that connects the gas-liquid separator and the evaporator. The gas-liquid separator may include a housing in which a portion of the refrigerant inflow pipe, the bypass pipe, and the refrigerant discharge pipe may be disposed, and first and second partition walls disposed in the housing.

Abstract: A refrigeration system including a storage chamber configured to store a product at a predetermined temperature. The storage chamber is defined by an inner wall. The inner wall at least partially defines an air plenum. The inner wall includes an opening wall surface, a floor surface, a rear wall surface and a ceiling wall surface. The system also includes a refrigerant circuit including a compressor, a condenser, a condenser fan, an evaporator and an evaporator fan arranged and disposed in an operable configuration to provide refrigeration to the storage chamber. The air plenum includes a conduit arranged and disposed to convey air from an air inlet across the evaporator and into a discharge chamber and out an air outlet. The air outlet is configured to discharge cooled air in a direction toward the opening wall surface.

Abstract: A grille assembly for an air handling unit is provided. The grille assembly includes a plurality of first wires aligned in a first plane perpendicular to a direction of flow of air and a plurality of second wires aligned in a second plane perpendicular to the direction of flow of air. The plurality of first wires and the plurality of second wires together form a staggered structure to at least partly enclose an air passage opening of the air handling unit. The second plane is parallel to the first plane and separated by an offset distance along a third plane parallel to the direction of flow of air.

Abstract: An automatic oil level retention system for a compressor and a method for controlling a same, including: a normal oil return mode and an auxiliary oil return mode. When a lubricating oil liquid level monitored by a liquid level detection unit in real time is above a required liquid level height, the system initiates only the normal oil return mode; and when the lubricating oil liquid level monitored by the liquid level detection unit in real time is below the required liquid level height, the system initiates the auxiliary oil return mode, and the auxiliary oil return mode is closed and the normal oil return mode is initiated after the lubricating oil liquid level monitored in real time is lifted above the required liquid level height.

Abstract: A flash gas bypass system includes a separation assembly having an inlet configured to receive a refrigerant flow from an expansion valve. A bypass conduit is coupled to a first port of the separation assembly and configured to receive a first portion of the refrigerant flow via the first port, where the first portion of the refrigerant flow includes flash gas. A second port of the separation assembly is coupled to an outlet conduit in fluid communication with an evaporator. The outlet conduit is configured to receive the second portion of the refrigerant flow via the second port and direct the second portion of the refrigerant flow toward the evaporator, where the second portion of the refrigerant flow includes liquid refrigerant. A filter is configured to redirect droplets captured by the filter from the first portion of the refrigerant flow into the second portion of the refrigerant flow.

Abstract: An air conditioner may include a compressor that compresses a refrigerant; a condenser that condenses the refrigerant discharged from the compressor; at least one expansion valve that expands the refrigerant passed through the condenser; at least one gas-liquid separation pipe through which the refrigerant passed through the at least one expansion valve flows; a gas-liquid separator, into which the refrigerant passed through the at least one gas-liquid separation pipe is introduced, that separates and discharges the refrigerant introduced into the gas-liquid separator into gas refrigerant and liquid refrigerant; and an evaporator that evaporates the liquid refrigerant discharged from the gas-liquid separator. The gas refrigerant discharged from the gas-liquid separator and the refrigerant passed through the evaporator may be provided to the compressor.