Abstract: Provided are a gas-replenishing and enthalpy-increasing control method, device and apparatus for a two-stage compressor. The method includes: when a gas-replenishing electronic expansion valve needs to be opened, gradually increasing, by a controller, an opening degree of the gas-replenishing electronic expansion valve in a time sequence; after the gas-replenishing electronic expansion valve is opened, acquiring a detected gas-replenishing superheat degree of a two-stage compressor; and adjusting, based on the gas-replenishing superheat degree of the two-stage compressor, the opening degree of the gas-replenishing electronic expansion valve, wherein the gas-replenishing electronic expansion valve is disposed between a medium-pressure liquid storage tank and the two-stage compressor, and when the opening degree of the gas-replenishing electronic expansion valve is not zero, a gaseous refrigerant in the medium-pressure liquid storage tank replenishes gas and increases enthalpy for the two-stage compressor.

Abstract: A heat pipe comprises a tube and protrusions. The tube has an internal surface, an external surface, and a length running from a first end to a second end. The protrusions are on the internal surface. A first cross-section of the protrusions at a first location of the length of the tube is different from a second cross-section of the protrusions at a second location of the length of the tube. The tube and the protrusions are monolithic.

Abstract: A liquefaction system and method for producing liquefied natural gas (LNG) is provided. The liquefaction system may include a heat exchanger to cool natural gas to LNG, a first compressor to compress and combine first and second portions of a single mixed refrigerant from the heat exchanger, a first cooler to cool the single mixed refrigerant from the first compressor to a first liquid phase and a gaseous phase, and a first liquid separator to separate the first liquid phase from the gaseous phase. The liquefaction system may also include a second compressor to compress the gaseous phase, a second cooler to cool the compressed gaseous phase to a second liquid phase and the second portion of the single mixed refrigerant, a second liquid separator to separate the second liquid phase from the second portion of the single mixed refrigerant, and a pump to pressurize the first liquid phase.

Abstract: Provided is a refrigeration apparatus in which a decrease in a temperature of an indoor heat exchanger can be suppressed as much as possible while depletion of refrigerator oil in a compressor is also suppressed. An air-conditioning apparatus configured from a parallel connection of a plurality of outdoor units to an indoor unit, wherein when a predetermined defrosting condition has been fulfilled, a controller includes at least one processor programmed to selectively execute a reverse-cycle defrost mode when a predetermined outflow condition pertaining to an outflow integrated quantity of refrigerator oil has also been fulfilled, and selectively execute an alternating defrost mode, in which the outdoor unit that is to be defrosted is changed in sequence, when the predetermined outflow condition has not been fulfilled.

Abstract: A heat exchanger having a drainage member (1) mounted on an open end (322) of a heat-transfer tube (32), wherein the drainage member (1) contains a flow guide portion (11) including an insertion portion (11a) configured to be inserted into the heat-transfer tube (32) from the open end (322), and a projecting portion (11b) projecting toward an outside of the heat-transfer tube (32) from the open end (322) and extending downward.

Abstract: A heating, ventilation, and air conditioning (HVAC) assembly. The HVAC assembly includes a first shaft and a first airflow door movable by the first shaft. A second shaft and a second airflow door movable by the second shaft are also included. A case houses the first airflow door and the second airflow door. A cap is coupled to both the first shaft and the second shaft outside of the case. Rotation of the cap simultaneously rotates the first shaft and the second shaft.

Abstract: A multiphase pumping system for transporting a fluid includes a multiphase pump configured to increase pressure within the fluid and a recuperator in fluid communication with the multiphase pump. The recuperator is configured to remove thermal energy from a fluid upstream of the multiphase pump and is further configured to add thermal energy to a fluid downstream of the multiphase pump. The multiphase pumping system further includes a cooler configured to remove thermal energy from the fluid upstream of the multiphase pump.

Abstract: A heat exchanger includes a plurality of flat tubes, a header part, and a guide part. An interior of the header part is partitioned into first and second spaces. One end of each of the tubes is connected to the first space. The guide part has a guide space positioned below the first space. The guide space communicates with the first space via an ascending opening. The first and second spaces communicate with each other via upper and lower communication ports provided within upper and lower sides of the header part, respectively. When the heat exchanger is viewed from above after installation, the tubes and the ascending opening have an area of overlap, and the ascending opening and a space where the lower communication port is extended do not overlap or have an area of overlap that is up to 50% of the ascending opening.

Abstract: An airtight penetration structure for heat dissipation device includes a first plate member, a second plate member, and a plurality of hollow shaft members. The first and the second plate member are closed to each other to together define a closed chamber between them. The hollow shaft members are respectively provided at two free ends with a first and a second flange. The hollow shaft members are correspondingly extended through fastening holes provided on the first and the second plate member with the first and the second flanges attached to and flush with outer surfaces of the first and the second plate member to seal around the fastening holes, so that the closed chamber between the first and the second plate member is in an airtight state.

Abstract: A bracket system includes a first bracket configured to couple a heat exchanger coil to a base of a heat exchanger via engagement of a mounting surface of the base, where the first bracket has a recessed member and a fastening tab, and a second bracket configured to couple the heat exchanger coil to a shroud of the heat exchanger via engagement of a fastener, where the second bracket has a protruding member and a protruding ridge. The recessed member is configured to receive the protruding member such that the first bracket and the second bracket are coupled to one another in a first configuration of the bracket system, and where the fastening tab is configured to receive the protruding ridge such that the first bracket and the second bracket are coupled to one another in a second configuration of the bracket system.

Abstract: An air conditioner includes a heat exchanger having one or more flow paths. At least one of the flow paths is associated with more than one pass and/or fluid flow through the flow path is restricted. A setting of the beat exchanger includes associations between flow path(s) and/or pass(es). A setting for the heat exchanger is determined and the heat exchanger is allowed to operate in the determined setting.

Abstract: A heat exchanger fixing structure, for two or more heat exchangers bent in multiple layers, includes two or more plates respectively fixed to one ends of the two or more heat exchangers, wherein portions of the two or more plates may overlap each other, and the two or more heat exchangers are connected and fixed to each other by fastening a fastening member to the overlapping portions.

Abstract: In an indoor unit for an air-conditioning apparatus, a filter, a cleaning mechanism configured to clean the filter, and a dust box are provided to an air inlet. Further, the dust box is provided so as to be freely mountable into and dismountable from a casing in a fore-and-aft direction.

Abstract: Methods and systems are provided for regulating the temperature of rear axle lubrication oil. In one example, a rear axle coolant system may include a coolant loop with a plurality of valves and sensors, regulating the coolant flow in heat exchange relationship with an exhaust gas heat recovery and storage system to deliver warm coolant to a rear axle heat exchanger to warm the rear axle lubrication oil. The method may regulate the components of the rear axle coolant system through a controller, receiving sensor input from the components of the coolant system.

Abstract: An axial fan includes: a hub; a plurality of blades arranged in a circumferential direction of the hub; a cutout in a rear edge part of each of the plurality of blades, the cutout divides the rear edge part into an outer rear edge part and an inner rear edge part; a first groove part disposed in the outer rear edge part, the first groove part including a plurality of grooves extending toward the front edge part; and a second groove part disposed in the inner rear edge part, the second groove part including a plurality of grooves extending toward the front edge part, the plurality of grooves of the first groove part and the plurality of grooves of the second groove part having different shapes when viewed in a rotational axis direction of the hub.

Abstract: A climate control system for a vehicle having a plurality of modes includes an evaporator having a downstream face. The system also includes at least one blower that blows air across the evaporator. The air downstream of the blower has a pressure distribution defined generally along the downstream face. The pressure distribution along the downstream face is variable depending on which of the plurality of modes the climate control system is currently set.

Abstract: A system and method for regulating an airstream to a radiator device of a vehicle. The device guides the airstream through at least one opening toward the radiator device, and includes at least two cover elements that at least partially close the at least one opening while in a closed position. The device includes a drive that moves the cover elements between the closed position and an open position such that the at least one opening is at least partially open. A driver coupled to the drive and cover elements transfers the movement from the drive to the elements.

Abstract: A device for controlling an airstream to a radiator device of an airstream, and an assembly of same between an assembly position and an operating position. When the device is in operating position, the airstream is guided via at least one opening to the radiator device. The device includes a cover element with at least one cover means that partially closes the opening while in a closed position and at least one bearing element connected to the cover means such that when the cover element is in operating position, the cover means can be moved between an open position and a closed position, and vice versa.

Abstract: A climate control system for a vehicle having a plurality of modes includes an evaporator having a downstream face. The system also includes at least one blower that blows air across the evaporator. The air downstream of the blower has a pressure distribution defined generally along the downstream face. The pressure distribution along the downstream face is variable depending on which of the plurality of modes the climate control system is currently set.

Abstract: A heat exchanger fixing structure, for two or more heat exchangers bent in multiple layers, includes two or more plates respectively fixed to one ends of the two or more heat exchangers, wherein portions of the two or more plates may overlap each other, and the two or more heat exchangers are connected and fixed to each other by fastening a fastening member to the overlapping portions.