Abstract: A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit.

Abstract: A heat exchanger comprises a shell having an elongated shape and a cylindrical geometry. A first fluid, fed through one or more first inlet pipes, flows inside the shell and a second fluid, fed through at least one second inlet pipe, flows inside the shell in order to perform heat exchange with the first fluid. The heat exchanger also comprises a fluid distributor assembly placed at the first inlet pipes. The fluid distributor assembly is provided with a first perforated plate, in turn provided with first through holes, and with at least one second perforated plate, in turn provided with second through holes. The second perforated plate is disposed parallel and downstream of the first perforated plate with respect to the flow direction of the first fluid flowing into the first through holes and the second through holes. Between the first perforated plate and the second perforated plate a hermetic seal device is disposed.

Abstract: A screw compressor comprises two screw rotors arranged in a screw rotor chamber, and mounted on the compressor housing to be rotatable about respective screw rotor axes, and mesh with one another. At least one control slide is arranged in a slide channel of the compressor housing, adjacently to both screw rotors by means of slide compression wall surfaces, is movable in a displacement direction parallel to the screw rotor axes, is rigidly connected to a piston rod that leads to a cylinder assembly for moving the at least one control slide, and is guided relative to the compressor housing by means of a guide insert that movably receives the piston rod in the displacement direction. The piston rod is guided transversely to the displacement direction in the guide insert in elastically resilient fashion by means of a guide element.

Abstract: A compressor/expander machine is pressure-proof with an electrical connecting unit arranged on the housing thereof comprising at least one electrical lead-through that leads into an inner space for an electrical connection with an electrical unit arranged in the housing. The electrical lead-through comprises a mounting body that is mounted on the housing as a separate element and electrical contact elements seated therein. The mounting body comprises a first mounting body sealing surface which is remote from the at least one inner space and surrounds the electrical contact elements in closed manner and which runs transverse to a compressive force that acts on the lead-through due to the medium under pressure in the at least one inner space and which cooperates in sealing manner with a first housing sealing surface of the housing that faces the at least one inner space and this first mounting body sealing surface.

Abstract: The present invention relates to a heat exchanger (2) having a jacket (10) through which a first medium (A) can flow and which has at least one first inlet (11) and at least one first outlet (12), at least one tube (30) through which a second medium (B) can flow, the tube (30) being guided through the jacket (10) and having at least one second inlet (31) and at least one second outlet (32), wherein a deflection segment (50) or a plurality of deflection segments (50) are arranged in a row in a longitudinal axis (X) in the jacket (10), wherein the deflection segment (50) is formed from at least two partial sections (51, 52), which are arranged so as to overlap and cross, in areas, transverse to the longitudinal axis (X).

Abstract: To be as lightweight and compact, for example for automotive technology, a scroll compressor further includes an axial guide that supports the movable compressor body to prevent movements in the direction parallel to a centre axis of the stationary compressor body and, in the event of movements, guides it in the direction transverse to the centre axis. A coupling prevents the movable compressor body from rotating freely. The axial guide supports a compressor body base, which carries the scroll vane, of the second compressor body against an axial support face, in that the axial support face abuts a sliding body such that it is slidable transversely to the centre axis. The sliding body is slidable transversely to the centre axis, on a carrier element that is arranged in the compressor housing.

Abstract: In order to improve safety in a refrigerant compressor system comprising a refrigerant compressor and an electric drive motor for driving the refrigerant compressor, and, arranged in a protected manner in an interior of a control housing, a control electronics system, comprising electric components or electronic power components, for controlling the electronic drive motor, it is proposed that, during operation of the refrigerant compressor system with combustible refrigerant, the control housing is provided with a refrigerant drain, which does not impair at least one protection criterion of the control housing, for discharging refrigerant which enters the interior due to a refrigerant leakage, said refrigerant drain causing the refrigerant entering into the interior due to the refrigerant leakage to pass out of the interior into the surroundings of the refrigerant compressor system.

Abstract: The invention relates to a compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front surfaces, and a channel for guiding at least a portion of said refrigerant entering through said su

Abstract: In order to improve a compressor comprising a compressor housing, a scroll compressor unit which is arranged in the compressor housing and comprises a first stationary compressor body and a second compressor body that can be moved relative to the stationary compressor body, an eccentric drive for the scroll compressor unit, said drive having a drive member which is driven by a drive motor and which revolves about the central axis of a driveshaft on an orbital path, and an orbital path balancing mass which counteracts an unbalance due to the compressor body moving on the orbital path, so that even at high rotational speeds the long-term stability of the drive member guidance in the drive member receptacle can be ensured, it is proposed that the orbital path balancing mass is coupled to the eccentric drive such that the mass moves on the orbital path in a manner corresponding to the movement of the drive member but is uncoupled with respect to the transmission of tilting moments to the drive member.

Abstract: A screw compressor includes two screw rotors and two control sliders that are arranged one behind the other in a slider channel. The control sliders have a combined position with mutually facing end surfaces sealing tightly with each other, and being movable together and have a separated position, with positionable spacing from one another, forming an intermediate space. In a transfer position between the combined and separated positions, the control sliders form an inflow chamber into which the medium to be compressed flows out of one of the compression chambers by passing between the mutually facing end surfaces of the control sliders. One of the control sliders is provided with at least one outflow outlet that is adjacent to the inflow chamber and through which the medium from the inflow chamber enters an outflow opening in the slider channel that overlaps with the outflow outlet in this transfer position.

Abstract: The invention relates to a compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front surfaces, and a channel for guiding at least a portion of said refrigerant entering through said su

Abstract: The invention relates to an expansion unit for installation in a refrigerant circuit, including an expansion system having an subcooling unit for subcooling a mass flow of a refrigerant that is supplied to the expansion unit, having an expansion/compression unit including an expander stage and a compressor stage, having a branching point that splits off a subcooling mass flow from a total mass flow supplied to the expansion unit and that is connected to a supply conduit that guides the subcooling mass flow to an inlet of the subcooling unit, having an expansion member that expands the subcooling mass flow to a subcooling pressure, having a connection conduit that supplies the subcooling mass flow exiting from the subcooling unit to the compression stage, which for its part compresses the subcooling mass flow to a return high pressure, and having an electrically operated controller that detects an ambient temperature and/or a temperature of the mass flow of refrigerant that is supplied to the expansion unit an

Abstract: In a refrigerant compressor for refrigeration plants, comprising a compressor unit driven by a drive unit, wherein at least one of these units is provided with a control unit which is controllable by means of a delivery rate control system in order to control the refrigerant compressor at different delivery rates, wherein an external delivery rate setpoint value is communicated to the delivery rate control system, in order to prevent critical operating states, it is proposed that the delivery rate control system acquires, by means of a sensor, a compressor reference temperature of the compressor unit, that the delivery rate control system ascertains an operating state value group for the acquisition of an operating state of the refrigerant compressor and, taking account of specified reference values, if the value of the ascertained operating state value group based upon the compressor reference temperature permits a critical operating state of the refrigerant compressor, specifies a delivery rate which has as

Abstract: In order to an initialising system for a refrigerant compressor unit, including a refrigerant compressor, an electrical drive motor for the refrigerant compressor and a compressor controller that determines the voltage and speed of the drive motor on the basis of sets of configuration parameters loaded into this compressor controller and controls the drive motor accordingly, wherein the initialising system has a compressor data memory, in which compressor data relating to respectively possible refrigerant compressors are stored, and a motor data memory, in which motor data relating to possible drive motors are stored, wherein the initialising system has a processor for performing the initialisation, a display unit and an input unit, wherein during initialisation the display unit and the input unit serve to determine the refrigerant compressor and the drive motor, and wherein the processor uses the compressor data of the determined refrigerant compressor and uses the motor data of the determined drive motor to

Abstract: In order to improve a refrigerant compressor, comprising an overall housing with a motor housing portion and a compressor housing portion, which has a cylinder housing with a cylinder head, wherein the cylinder head has a cylinder head lower part arranged on the cylinder housing and a cylinder head upper part which closes off the cylinder head and has at least one outlet chamber integrated in the cylinder head upper part, in such a way that it is possible to provide optimal protection for the cylinder head, it is proposed that the cylinder head is covered by means of a hood which engages over the cylinder head upper part on an upper side facing away from the cylinder head lower part with a hood cover and over the cylinder head in the region of its peripheral side with a hood skirt surrounding the cylinder head.

Abstract: In a refrigerant compressor comprising an overall housing with a motor housing portion, in which there is arranged a motor chamber having, provided therein, an electric motor comprising a stator and a rotor, and with a compressor housing portion which has a compressor unit, in order to be able to mount the stator as easily as possible it is proposed that the stator is mounted in the motor housing portion by means of supporting elements inserted into the motor housing portion, which supporting elements on the one hand abut against a stator-receiving surface of the motor housing portion and on the other hand surround the stator inserted into the supporting elements on its outer side and support it spring-elastically relative to the stator-receiving surface.

Abstract: In order to adapt to different operating conditions a screw expander, comprising an expander housing with a screw rotor chamber arranged therein, two screw rotors arranged in the screw rotor chamber and mounted rotatably in the expander housing, which screw rotors intermesh with their screw contours in order to receive working medium supplied by means of a high-pressure chamber arranged in the expander housing and in order to discharge said medium in the region of a low-pressure chamber arranged in the expander housing, and a generator driven by the screw rotors, it is proposed that the screw expander has at least one control slide, which is arranged in a slide channel of the expander housing and is adjacent to both screw rotors with slide wall surfaces, which control slide is movable in a displacement direction parallel to the screw rotor axes and is thereby configured to influence the final volume and/or the initial volume, and that a slide drive is provided for moving the control slide into different slide

Abstract: A thermally insulating sleeve for a compressor discharge pipe is provided. The insulating sleeve includes a non-metallic first half-sleeve having a first curved body portion and a first extended portion. The first curved body portion is configured to fit at least partially around a portion of the compressor discharge pipe. A non-metallic second half-sleeve has a second curved body portion configured to attach to the first curved body portion such that the first and second curved body portions completely encircle the portion of the compressor discharge pipe. The second half-sleeve includes a second extended portion configured to attach to the first extended portion. Each of the first and second extended portions include respective first and second cavities which, together, encase a temperature sensor in contact with, or in spaced relation to, the compressor discharge pipe.

Abstract: In order to improve an expansion installation for obtaining electrical energy from heat by means of a thermodynamic circulation procedure, comprising an expansion device, which is operated by an expanding working medium of the thermodynamic circulation procedure, and a generator driven by the expansion device, it is proposed that the expansion installation should be provided with a rotational speed sensor, which is coupled to a shaft of the expansion installation that rotates proportionally to a rotor of the generator, and which takes the form of an electrical sensor generator that generates an electrical sensor signal.