A refrigeration system for cooling an object and preventing system overheating. The system includes an evaporator coil configured to thermally communicate with the object, where the object is cooled by a refrigerant flowing through the evaporator coil. A compressor receives the refrigerant downstream from the evaporator coil and increases a pressure of the refrigerant. A condenser receives the refrigerant downstream from the compressor, where the refrigerant is cooled by flowing through the condenser. An expansion valve receives the refrigerant downstream from the condenser and decreases the pressure of the refrigerant, where the evaporator coil receives the refrigerant downstream from the expansion valve. An bypass coolant valve also receives the refrigerant downstream from the condenser. The compressor also receives the refrigerant downstream from the bypass coolant valve, and the refrigerant received by the compressor from the bypass coolant valve bypasses the evaporator coil to prevent overheating of the compressor.

A water chiller includes at least one refrigeration apparatus, a water circuit in which circulates a water flow to be cooled down, and at least one fan generating an air flow (Fl) that is aspired from the outside. The refrigeration apparatus comprises a refrigerant circuit functioning in closed loop and comprising a compressor, at least one condenser, an expansion valve and an evaporator. The condenser is configured to release heat from the refrigerant to the air flow (Fl) under action of said at least one fan, the evaporator is configured to draw heat from the water flow to cool down said water flow. The water chiller further comprises at least one free cooling heat exchanger, configured to be exposed to the air flow (Fl), and connectable to the water circuit.

A heat pump system including a charge compensator having a liquid line port for an inflow of a refrigerant into the charge compensator and for an outflow of the refrigerant from the charge compensator. The heat pump system further includes an isolation valve configured to control flows of the refrigerant to and from the charge compensator through a liquid line piping of the heat pump system based on whether the heat pump system is operating in a cooling mode, a defrost mode, or a heating mode, where the liquid line port is fluidly coupled to the liquid line piping of the heat pump system.

A refrigeration apparatus, including a main circuit (1) for circulation of a main flow (90) of refrigerant, and a lubrication branch (20), comprising a lubrication inlet (21), configured to derive a lubrication flow (91) from the main flow (90) circulating through a supply part (16) of the main circuit; and a lubrication outlet (22), to feed the compressor (2) with the lubrication flow (91) for lubrication. According to the invention, the refrigeration apparatus further includes: a subcooling branch (40), comprising a subcooling inlet (41), connected to an evaporator (8) of the main circuit (1), so as to derive a subcooling flow (92), and a subcooling outlet (42), connected to the evaporator (8), for reintroducing the subcooling flow (92) into the main flow (90); and a subcooling heat exchanger (31).

An air-conditioning apparatus includes a refrigerant circuit in which pipes sequentially connect a compressor, a flow switching device, a heat source side heat exchanger, an expansion device, a load side heat exchanger, and the flow switching device, and configured to perform a cooling operation and a heating operation switched by the flow switching device, an oil separator configured to separate refrigerating machine oil from refrigerant discharged from the compressor, a first bypass passage in which fluid flowing out of the oil separator flows, an auxiliary heat exchanger configured to cool the fluid, a first flow control device configured to control passing of the fluid, a second bypass passage in which liquid refrigerant or two-phase gas-liquid refrigerant flowing through one of the pipes connecting the heat source side heat exchanger and the expansion device flows, and a second flow control device configured to control passing of refrigerant.

A cooling device for a frequency converter of a refrigerating or conditioning plant comprises at least one thermal exchange element supplied with a total flow rate of refrigerating fluid; regulating means configured to selectively regulate the total flow rate of refrigerating fluid on the basis of at least one parameter indicative of the temperature of the frequency converter.

The present disclosure relates to a refrigeration system that includes an evaporator disposed along an evaporator line, a compressor system disposed along a compressor line, a condenser disposed along a condenser line and configured to condense the refrigerant compressed by the compressor system to heat a second fluid stream, and an outdoor coil disposed along a coil line and configured to receive the refrigerant from the condenser or from a discharge line, to selectively transfer heat to or from the refrigerant, and to selectively transfer the refrigerant to the evaporator or to a suction line. The refrigeration system includes two valves and three expansion valves disposed along the different refrigerant flow lines, and a controller configured to determine a simultaneous heating/cooling operating mode of the refrigeration system and to control the valves and expansion valves to operate the refrigeration system in the desired mode.

The present invention concerns a thermal management device comprising an indirect air-conditioning circuit (1) for a motor vehicle, comprising: a first refrigerant loop (A) comprising, in the direction of flow of the refrigerant, a compressor (3), a two-fluid heat exchanger (5), a first expansion device (7), a first heat exchanger (9) arranged inside a first heating, ventilation and air-conditioning device (X), a second expansion device (11), a second heat exchanger (13), and a first bypass duct (30) comprising a first stop valve (33), a first inner heat exchanger (19), a second inner heat exchanger (19), a second bypass duct (40) comprising a third expansion device (17) arranged upstream from a first cooler (15), a third bypass duct (80) comprising a first additional heat exchanger (9) arranged in a second heating, ventilation and air-conditioning device (Y), a second heat transfer fluid loop (B).

An information display device comprising a processor, the processor executing: time information acquiring processing of acquiring time information; azimuth information acquiring processing of acquiring azimuth information; coordinate setting processing of setting a time coordinate system for display of the time information on a display image and setting an azimuth coordinate system for display of the azimuth information on the display image; and display control processing of displaying particular time information acquired by the time information acquiring processing, in the time coordinate system set on the display image and particular azimuth information acquired by the azimuth information acquiring processing, in the azimuth coordinate system set on the display image.

A controller that controls an electric compressor, which is mounted to a vehicle and configures a two-stage compression refrigeration cycle device, has a deceleration section, an operation stop section, and a restart section. The deceleration section reduces a rotational speed of an electric motor by controlling an AC current which is output to the electric motor, when a two-stage compression mode, in which an intermediate-pressure refrigerant flows into the electric compressor from an intermediate-pressure port, is performed and an operation stop request to stop the electric compressor is made. The operation stop section stops the electric motor after the deceleration section reduces the rotational speed of the electric motor. The restart section restarts the electric compressor when the operation stop request is canceled after the operation stop section stops the electric compressor.