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: 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: The present invention relates to an apparatus and to a method for carrying out a vapour refrigeration process. The apparatus has a motor-operated main compressor which is equipped to suck-in a mass flow of a fluid serving as a refrigerant which is at evaporating pressure level and to compress this mass flow to a high pressure level, and also a high-pressure heat exchanger which is equipped to cool the mass flow of the fluid at a high pressure level, to increase a density and to reduce a temperature of the fluid. Also provided is an expander which is equipped to expand the mass flow of the fluid coming from the high pressure heat exchanger to evaporating pressure level in work-performing manner, and an evaporator which is equipped to absorb heat such that the density of the fluid decreases as it passes through the evaporator and the temperature of the mass flow coming from the expander at evaporating pressure and the temperature of the fluid being fed through the evaporator increase.

Abstract: The present invention relates to an apparatus and to a method for carrying out a vapour refrigeration process. The apparatus has a motor-operated main compressor which is equipped to suck-in a mass flow of a fluid serving as a refrigerant which is at evaporating pressure level and to compress this mass flow to a high pressure level, and also a high-pressure heat exchanger which is equipped to cool the mass flow of the fluid at a high pressure level, to increase a density and to reduce a temperature of the fluid. Also provided is an expander which is equipped to expand the mass flow of the fluid coming from the high pressure heat exchanger to evaporating pressure level in work-performing manner, and an evaporator which is equipped to absorb heat such that the density of the fluid decreases as it passes through the evaporator and the temperature of the mass flow coming from the expander at evaporating pressure and the temperature of the fluid being fed through the evaporator increase.

Abstract: The invention concerns a combined piston-expander compressor comprising a plurality of pistons (3, 14) which are mechanically coupled together by a piston rod (4), as well as a main slide (6), an auxiliary slide (7) and a control valve (9) for control purposes, characterized in that the main slide (6) is formed from a plurality of slide elements that are not interconnected, two outer slide bodies (6a, 6b) being provided. Control pistons (6c) with control edges and simple slide elements (6d) are arranged in a row between the outer slide elements, in the form of a small piston (6a) and a large piston (6b), such that a differential pressure acting on the outer slide elements (6a, 6b) automatically and mechanically holds together the main slide (6).

Abstract: The invention relates to a heat engine having a working medium cycle, comprising: an evaporator for evaporating the liquid working medium; an expander for expanding the evaporated working medium; a condenser for liquefying the expanded working medium from the expander; and a working medium pump for supplying liquid working medium to the evaporator, wherein a valve is provided for controlling the amount of working medium conveyed from the working medium pump to the evaporator.