An apparatus includes a suction header, a drain leg, an oil separator, and an oil reservoir. The suction header is configured to receive a refrigerant and the drain leg is coupled to the suction header. The oil separator is configured to separate an oil from the refrigerant from a compressor. During a first mode of operation, the drain leg is configured to collect an oil from the refrigerant from a compressor at the suction header. During a second mode of operation, the oil separator is configured to direct the oil separated from the refrigerant from the compressor through the drain leg and to the oil reservoir.

A compressor includes a shell that defines an enclosed space inside the shell, an electric motor unit located in the enclosed space of the shell and configured to generate a driving force, and a compression unit located in the enclosed space of the shell and configured to compress refrigerant. The compression unit includes a cylinder and a piston that is configured to reciprocate in the cylinder based on the driving force transmitted from the electric motor unit. The shell includes a plurality of heat radiation fins that are located at an outer circumferential surface of the shell and that are configured to emit heat generated inside the shell to an outside of the shell.

Provided herein are compact chiller and cooler apparatuses, devices and systems. Chiller apparatuses disclosed herein include a refrigeration system contained in a central housing with an external heat exchanger or “cold finger” designed to be universally applicable to cooling various sizes and configurations of water baths and laboratory applications needing a cooling capacity. Chiller apparatuses disclosed herein are designed to be universally used with rotary evaporators, vacuum ovens, centrifugal concentrators and freeze dryers.

A packaged, pumped liquid, evaporative-condensing recirculating ammonia refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated inside the plenum of a standard evaporative condenser unit, and the evaporator is close coupled to the evaporative condenser. Single or dual phase cyclonic separators may also be housed in the plenum of the evaporative condenser.

A centralized energy module for a vehicle includes a base plate, a compressor mounted on the base plate, a first condenser mounted on the base plate at a location spaced part from the compressor and configured for condensing the refrigerant through heat-exchange with a first coolant supplied from a high temperature radiator while firstly passing the refrigerant supplied from the compressor, a second condenser connected with the first condenser and configured for condensing the refrigerant through heat-exchange with a second coolant supplied from a low temperature radiator while secondly passing the refrigerant supplied from the compressor, an expansion valve connected with the second condenser, and an evaporator mounted on the base plate, evaporating the refrigerant supplied from the expansion valve through heat-exchange with a third coolant which flows into the evaporator and supplying the evaporated refrigerant to the compressor.

A displacement compressor system for the refrigerant R718 includes a compressor machine, an evaporator, and a condenser. The open compressor machine is designed as a spindle compressor in the form of a double-shaft rotation displacement compressor for displacing and compressing gaseous conveying media. The displacement compressor has a spindle rotor pair which is arranged in a compressor housing and is designed with an electronic motor pair spindle rotor synchronization function. The compressor machine is arranged between the evaporator and the condenser.

A dehumidifier includes: a housing; a refrigerant circuit configured to allow low GWP refrigerant to circulate therethrough, the refrigerant circuit including a compressor having a variable operating frequency, a condenser, a pressure reducing device, and an evaporator, which are provided in the housing, the low GWP refrigerant being flammable and having a value of GWP of 6 or less; a blowing fan, which is provided in the housing, and is configured to take in air in a room into the housing and cause the taken-in air to pass through the evaporator and the condenser before blowing out the air from the housing into the room; and a water storage tank, which is provided below the evaporator, and is configured to accumulate dew condensation water generated in the evaporator, a number of refrigerant paths passing through the evaporator being greater than a number of refrigerant paths passing through the condenser.

A packaged, pumped liquid, recirculating refrigeration system with charges of 10 lbs or less of refrigerant per ton of refrigeration capacity. The compressor and related components are situated in a pre-packaged modular machine room, and in which the condenser is mounted on the machine room and the evaporator is close coupled to the pre-packaged modular machine room. Prior art large receiver vessels may be replaced with a single or dual phase cyclonic separator also housed in the pre-packaged modular machine room.

A heat pump includes a condenser having a condenser housing; a compressor motor mounted on the condenser housing and having a rotor and a stator, the rotor having a motor shaft which has a compressor wheel for compressing working medium vapor mounted thereon, and the compressor motor having a motor wall; a motor housing which surrounds the compressor motor and has a working medium intake so as to direct liquid working medium out of the condenser to the motor wall for the purpose of cooling the motor, wherein the motor housing is further configured to form a vapor space during operation of the heat pump, and wherein the motor housing further has a vapor discharge outlet for discharging vapor from the vapor space within the motor housing.

An apparatus includes a suction header, a drain leg, an oil separator, and an oil reservoir. The suction header is configured to receive a refrigerant and the drain leg is coupled to the suction header. The oil separator is configured to separate an oil from the refrigerant from a compressor. During a first mode of operation, the drain leg is configured to collect an oil from the refrigerant from a compressor at the suction header. During a second mode of operation, the oil separator is configured to direct the oil separated from the refrigerant from the compressor through the drain leg and to the oil reservoir.