A bulb (5) for a thermostatic expansion valve is provided, said bulb (5) comprising a chamber (7), said chamber (7) being located within a metallic casing of said bulb and being filled with a filling adapted to influence a valve element of said thermostatic expansion valve. Service of a temperature controlled valve connected to a bulb should be facilitated. To this end said bulb (5) comprises a connection geometry (10) adapted to be connected to a capillary member (6) and said casing being provided with a closed opening zone located within said connection geometry (10), said opening zone being adapted to be opened upon mounting a counterpart (15) to said connection geometry (10).

A motor drive apparatus includes a power converter including an inverter having an upper arm and a lower arm, the inverter being configured to control an operation of an electric motor, and a drive controller configured to apply a dead time for preventing a short circuit between the upper arm and the lower arm, and to control the power converter. The drive controller is configured to control the power converter by switching a first mode in which a first correction value representing a time used to correct a voltage drop due to the dead time is employed to control the power converter, and a second mode in which a second correction value smaller than the first correction value is employed to control the power converter.

A heat pump system and control method thereof. The heat pump system includes: a main flow path with a compressor, a reversing valve, a first heat exchanger, a first throttling device and a second heat exchanger; the heat pump system further includes an ejector comprising a high-pressure fluid inlet, a fluid suction inlet and a fluid outlet, the high-pressure fluid inlet of the ejector is connected between the second heat exchanger and the first throttling device on the main flow path through a second throttling device, the fluid suction inlet of the ejector is connected to the reversing valve, and the fluid outlet of the ejector is connected to a separator, and a gas phase outlet of the separator is connected to the compressor, and a liquid phase outlet of the separator is connected between the first heat exchanger and the first throttling device on the main flow path.

A refrigeration system is provided and includes a common suction line, a common discharge line, first and second high-side compressors disposed in parallel to receive low-pressure refrigerant from the common suction line and to direct high-pressure refrigerant to the common discharge line, a first pipe connected to the first and second high-side compressors at vertical heights at which an oil supply is required to remain higher and a second pipe connected to the first and second high-side compressors at vertical heights sufficient to maintain gas pressure balance between the first and second high-side compressors.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

The invention relates to an expansion device for refrigeration apparatuses, comprising a suction tube (1) and a capillary tube (2) in a single extruded aluminum profile, in which the two parallel tubes, referred to as the suction tube (1) and the capillary tube (2), are linked together by a wall portion in the manner of a connection (3), in which said connection-shaped wall (3) can thus be cut to a sufficient desired length to release the ends of the suction tube (1) and of the capillary tube (2) at both tips or just one tip of the device, logically so that said tips can be handled and adapted to suit each project.

An electronic expansion valve, a heat exchange system, and a control for controlling an electronic expansion valve. The electronic expansion valve includes: a valve body; a first temperature sensor configured to detect an evaporator temperature T.sub.eva; a second temperature sensor configured to detect a compressor inlet temperature T.sub.suc; a third temperature sensor configured to detect a compressor outlet temperature T.sub.dis; a fourth temperature sensor configured to detect a condenser temperature T.sub.con; and a controller, which is associated with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor, and which adjusts an opening degree of the valve body based on temperature signals from the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor.

A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.

A magnetic heat pump includes magnetocaloric members, an impeller, deformable members, a casing, an electric motor, and a magnetic field generator. The impeller has accommodation chambers. The deformable members face the accommodation chambers. The casing has an interior space accommodating the magnetocaloric members, the impeller, and the deformable members and allowing a heat transport medium to circulate, a first inlet, and a first outlet spaced apart from the first inlet in the circumferential direction. The magnetic field generator produces a magnetic field becoming stronger along the first direction, in a first region extending from the first inlet to the first outlet in the first direction in the interior space. The shapes of the deformable members individually change with the rotation. The volumes of the accommodation chambers individually increase and decrease with change in shape of the deformable members.

A vapor compression refrigeration system having an air dehumidifying system and a heat transfer system. The dehumidifying system has a refrigerant circuit and an air circulating system transporting air from an enclosed space at least partly through the refrigerant circuit and back to the enclosed space. The refrigerant circuit carries a phase change refrigerant which picks up heat from the air passing through the air circulating system. The heat transfer system carries a fluid that will not freeze below the ambient temperature. A heat exchanger connects the refrigerant circuit to the heat transfer system to pass heat from the phase change refrigerant in the refrigerant circuit to the fluid in the heat transfer system. At least one heat removal unit in the heat transfer system to remove heat from the fluid.