Abstract: An HVACR system, a direct expansion evaporator, and a direct expansion heat exchanger tube arranged to evaporate a working fluid inside the tube are disclosed. The tube includes an exterior surface of the tube opposing an inner surface of the tube, and a cavity layer on the inner surface configured to evaporate the working fluid flowing in a first flow path arranged to direct the first fluid to flow through the tube and contact the cavity layer on the inner surface. A second flow path, separate from the first flow path, is arranged to direct a second fluid across the tube and to contact the extended member on the exterior surface of the tube such that the first fluid exchanges thermal energy with the second fluid.

Abstract: A rotary compressor includes a casing, a compression mechanism housed in the casing and having a suction port, a joint pipe fixed to the casing and formed into a cylindrical shape, a suction pipe arranged inside the joint pipe and communicating with the suction port, and an accumulator including an outlet pipe connected to an inlet end of the suction pipe. A large diameter portion formed on an inlet side of the suction pipe is fixed to an inner peripheral surface of the joint pipe, and a small diameter portion formed on an outlet side of the suction pipe has a smaller outside diameter than the large diameter portion. The joint pipe is made of an iron-based material. A clearance is formed between an outer peripheral surface of the small diameter portion of the suction pipe and the inner peripheral surface of the joint pipe.

Abstract: A refrigeration system includes a compressor for compressing a refrigerant, a condenser for cooling the refrigerant, an evaporator for heating the refrigerant, and a lubrication system for providing a lubricant mist to a movable component of the compressor. The lubrication system includes an ejector arranged in fluid communication with the compressor and the evaporator, wherein the lubricant mist is carried by the refrigerant to the movable component.

Abstract: A condenser includes a casing and pipes. The casing includes an inlet chamber, an outlet chamber, a first inlet, a first outlet, an accommodation space, a second inlet, and a second outlet. The first inlet and the first outlet are respectively in fluid communication with the inlet chamber and the outlet chamber. The accommodation space accommodates a coolant, and the second inlet and the second outlet are in fluid communication with the accommodation space not in fluid communication with the inlet chamber and the outlet chamber. The pipes are in the accommodation space and connect the inlet chamber with the outlet chamber, and a working fluid flows from the inlet chamber to the outlet chamber via the pipes. The first inlet is located closer to the second outlet than the first outlet, and the first outlet is located closer to the second inlet than the first inlet.

Abstract: An HVAC system having a fixed orifice expansion device coupled to an evaporator coil is provided. In one embodiment, an expansion device coupled to an evaporator coil includes a flow restrictor and an evaporator inlet manifold. The flow restrictor includes multiple fixed orifices aligned with the refrigerant distribution tubes to restrict flow of refrigerant from the evaporator inlet manifold into the refrigerant distribution tubes through the multiple fixed orifices. Additional systems, devices, and methods are also disclosed.

Abstract: A heat exchange system and a method for reclaiming corrosion inhibitor in a heat exchange system are provided by the present disclosure. The heat exchange system includes a compressor (1), a condenser (2) and an evaporator (3) connected in sequence, and the heat exchange system further includes a system for reclaiming corrosion inhibitor which includes an ejector (6) including a high-pressure fluid inlet (61) connected to an outlet (11) of the compressor, a suction fluid inlet (62) connected to the heat exchange system to extract a liquid-state refrigerant in the heat exchange system, and a fluid outlet (63) leading to bearings of the compressor, wherein a pressurizing device (5) is provided between the outlet of the compressor and the high-pressure fluid inlet of the ejector. The heat exchange system according to the embodiments of the present disclosure can provide sufficient corrosion inhibitor to the bearings of the compressor under various working conditions.

Abstract: An air conditioner includes: a casing; a partition plate in the casing that separates a heat-source-side space of the casing through which outdoor air passes and a utilization-side space of the casing through which indoor air passes and blocks air flow between the heat-source-side space and the utilization-side space; a heat-source-side heat exchanger in the heat-source-side space that causes heat exchange between a refrigerant and the outdoor air; a utilization-side heat exchanger in the utilization-side space that causes heat exchange between the indoor air and the heat-exchanged refrigerant; a duct that extends from the utilization-side space to an indoor air conditioning target space; and a refrigerant leakage sensor in the utilization-side space that detects leaked refrigerant in the utilization-side space.

Abstract: A multi-stacked heat exchanger comprises a first heat exchanger and a second heat exchanger. A first end of the first heat exchanger receives a first fluid in a first conduit flowing in a first direction within a plane. A first end of the second heat exchanger receives the first fluid from the first heat exchanger in a second direction flowing opposite to the first direction within the plane. A flow of a second fluid is communicated through the second heat exchanger and then through the first heat exchanger, in a second direction orthogonal to the first direction. The second fluid is in thermal communication with the first fluid in the second heat exchanger and then in the first heat exchanger. By doubling the flowed first fluid back upon itself, embodiments achieve counterflow between the first fluid and second fluid within a compact space.

Abstract: Described is a stopper including a filtering unit housed in an interior of a liquid receiver main body through which a refrigerant passes, a fixed portion that includes a screw portion that is screwed into an inner peripheral face of the liquid receiver main body, a sealing member in contact with the inner peripheral face of the liquid receiver main body, thereby preventing a leakage of a refrigerant to the fixed portion, and a movable connection portion provided between the filtering unit and the fixed portion for linking the filtering unit to the fixed portion in such a way that the filtering unit is not caused to follow a rotation of the fixed portion, and in such a way that the filtering unit is caused to follow an axial direction movement of the fixed portion.

Abstract: A cryopump includes an accommodation space for a condensed layer of gas, a first-stage cryopanel having an inner surface of the first-stage cryopanel disposed so as to surround the accommodation space, and a second-stage cryopanel disposed so as to be surrounded by the inner surface of the first-stage cryopanel together with the accommodation space. A first-stage heat load is incident on the inner surface of the first-stage cryopanel from outside the cryopump through an intake port, and the gas enters the accommodation space from outside the cryopump. The first-stage cryopanel is cooled to a temperature higher than a condensation temperature of the gas, the second-stage cryopanel is cooled to a temperature of the condensation temperature or less, and the condensed layer is deposited. The cryopump monitors the amount of condensed gas in the accommodation space based on a change in the first-stage heat load.

Abstract: A water chamber structure for a condenser, including an orifice plate arranged at one end of the condenser; a water cover fixed to the orifice plate in a sealed manner to form a water storage space; and a partition plate assembly for dividing the water storage space into a water inlet chamber and a water outlet chamber in a sealed manner, including: a first partition plate, the top and side walls of the first partition plate are fixed to the inner walls of the water cover; and a second partition plate, the top of the second partition plate is fixedly connected with the bottom of the first partition plate, the bottom of the second partition plate is fixed to the orifice plate, and the side walls of the second partition plate are connected with the inner walls of the water cover in a sealed manner.

Abstract: A lubricant supply system is for a compressor that compresses a first working fluid in a heat transfer circuit. The lubricant supply system includes a lubricant tank, a lubricant pathway for supplying lubricant from the lubricant tank to one or more bearings of the compressor, and a lubricant refrigeration system with a lubricant heater and a lubricant cooler. The lubricant heater configured to heat the lubricant discharged from the one or more bearings and the lubricant cooler configured to cool the lubricant flowing through the lubricant pathway. A method of lubricating a compressor includes heating the lubricant, directing the lubricant from a lubricant tank through a lubricant pathway to one or more bearings of the compressor, and cooling the lubricant passing through the lubricant pathway.

Abstract: An outer panel-mediated cooling system includes a heat source chamber; a cooling path that is located between outer and inner panels; a non-cooling path that is located between the outer and inner panels and thermally insulated from a cooling path and the outer panel and through which at least one of pressurized gas and return gas from the heat source chamber passes; a mixing chamber into which cooled gas leaving the cooling path and an uncooled gas leaving the non-cooling path flow, in which the cooled gas and the uncooled gas are mixed to form a mixed gas, and out of which the mixed gas flows toward the heat source chamber; and a flow rate regulating valve that regulates a flow rate of gas flowing toward the mixing chamber.

Abstract: An air conditioning system including swappable/interchangeable heat exchanger access panels with accessory mounting capabilities is disclosed. The air conditioning system includes a heat exchanger, a drain pan beneath the heat exchanger to collect condensation from the heat exchanger, a bracket with an opening coupled to the heat exchanger, a plurality of interchangeable access panels adapted to be interchangeably mounted to the opening on the bracket, and an accessory coupled to one of the plurality of access panels.

Abstract: A climate-control system may include a first compressor, a second compressor, a suction manifold, and a flow restrictor. The first and second compressors each include a shell and a compression mechanism. The shells define suction chambers from which the compression mechanisms draw working fluid. The shells include suction inlet fittings through which working fluid is drawn into the suction chambers. The suction inlet fittings are fluidly connected to the suction manifold. The suction manifold provides suction-pressure working fluid to the suction inlet fittings of the first and second compressors. The flow restrictor may be at least partially disposed within the suction manifold.

Abstract: A method of assembling a refrigeration unit includes inserting a machine compartment assembly, including a base plate and a compressor coupled to the base plate, into a machine compartment of the refrigeration unit, mounting a control box of the refrigeration unit to a side panel, and coupling the side panel to the refrigeration unit, such that the side panel conceals a lateral side of the machine compartment and the control box is laterally-inboard of the side panel.

Abstract: A compressor operable in a heat pump mode of a refrigerant circuit includes a compression space in which a refrigerant is compressed. The compression space includes a discharge port and an injection port. A discharge chamber is fluidly coupled to the compression space by the discharge port. An injection chamber is fluidly coupled to the compression space by the injection port. A discharge recirculation pathway selectively provides fluid communication between the discharge chamber and the injection chamber. An injection of the recirculated refrigerant into the compression space through the injection port results in an increase in pressure, and hence temperature, of the refrigerant when discharged to the discharge chamber. The increased temperature of the discharged refrigerant increases a heating capacity of a condenser of the associated refrigerant circuit.

Abstract: The current invention provides an evaporative condensing system using an evaporative condenser heat exchanger having an outer surface. The heat exchanger has a superhydrophilic surface. A compressor is configured to circulate a working fluid through the heat exchanger. A water distribution system is adapted to deposit a controlled amount of water on the heat exchanger to absorb heat from the heat exchanger by evaporation of water from the heat exchanger. A collector is located below the heat exchanger to receive excess water from the heat exchanger and direct excess water to a drain and an air delivery system is provided to direct air over the heat exchanger. The water distribution system supplies water to the heat exchanger in sufficient quantity that the water wets the heat exchanger, keeps the heat exchanger wet along its length, and excess water remains to carry dissolved solids to the collector.

Abstract: An air conditioning system is provided and including a solar heat generator configured for collecting solar radiation and for heating fluid by the solar radiation and a fluid container coupled to the solar heat generator and being configured to maintain the heated fluid. The system further includes a heat exchanger disposed inside the fluid container and being configured for transferring heat from the heated fluid to refrigerant inside the heat exchanger, the heat exchanger is configured to increase pressure and temperature of the refrigerant. The system further includes a condenser, an expansion member and an evaporator configured to form together with the heat exchanger an air-conditioning cycle.

Abstract: A method includes receiving, by a processing device and from a variable frequency drive coupled to one or more compressors, operation information of the one or more compressors. The method also includes comparing the operation information of the one or more compressors to an operation threshold and determining that the operation information satisfies the operation threshold. The method also includes changing, based on the determination that the operation information of the one or more compressors satisfies the operation threshold, an operation parameter of a component of the refrigeration system. Changing the operation parameter increases at least one of: (i) a velocity of a working fluid in a piping assembly fluidly coupled to the one or more compressors, or (ii) a flow rate of an oil in the piping assembly flowing into the one or more compressors.