Screw compressor including control sliders that cooperate to form an inflow chamber for inflow from a compression chamber and with one slider provided with an outflow outlet

A screw compressor, comprising:

• a compressor housing having a screw rotor chamber arranged therein,
• two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing, each rotatably about a respective screw rotor axis, and engage in each other by means of their helical contours and each cooperate with compression wall surfaces which are adjacent thereto and partly surround them in order to receive gaseous medium that is supplied by way of a low-pressure chamber arranged in the compressor housing and to discharge the gaseous medium in the region of a high-pressure chamber that is arranged in the compressor housing, wherein the gaseous medium is enclosed in compression chambers that are formed between the helical contours and compression wall surfaces that are adjacent thereto with an inflow volume at low pressure and is compressed to a final volume at high pressure, and
• two control sliders that are arranged one behind the other in a slider channel of the compressor housing in a direction of displacement parallel to the screw rotor axes and are adjacent to the two screw rotors by means of slider compression wall surfaces and are movable in the direction of displacement, wherein a first control slider of the two control sliders is arranged such that it affects the final volume and a second control slider of the two control sliders is arranged such that it affects the initial volume, wherein, in a combined position with mutually facing end surfaces the first control slider and the second control slider are sealed tightly with each other and are movable together in the direction of displacement and, in a separated position, are positionable at a spacing from one another, forming an intermediate space between the mutually facing end surfaces,
• wherein the two control sliders take a form in the mutually facing end surfaces such that, in the event of a transfer from the combined position to the separated position, a first throttling gap having a gap width that runs transversely to the direction of displacement is formed in a first transfer position that comes directly after the combined position, the first throttling gap being formed at a location different than the intermediate space.

A screw compressor, comprising:

• a compressor housing having a screw rotor chamber arranged therein,
• two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing, each rotatably about a respective screw rotor axis, and engage in each other by means of their helical contours and each cooperate with compression wall surfaces which are adjacent thereto and partly surround them in order to receive gaseous medium that is supplied by way of a low-pressure chamber arranged in the compressor housing and to discharge the gaseous medium in the region of a high-pressure chamber that is arranged in the compressor housing, wherein the gaseous medium is enclosed in compression chambers that are foimed between the helical contours and compression wall surfaces that are adjacent thereto with an inflow volume at low pressure and is compressed to a final volume at high pressure, and
• two control sliders that are arranged one behind the other in a slider channel of the compressor housing in a direction of displacement parallel to the screw rotor axes and are adjacent to the two screw rotors by means of slider compression wall surfaces and are movable in the direction of displacement, wherein a first control slider of the two control sliders is arranged such that it affects the final volume and a second control slider of the two control sliders is arranged such that it affects the initial volume, wherein, in a combined position with mutually facing end surfaces the first control slider and the second control slider are sealed tightly with each other and are movable together in the direction of displacement and, in a separated position, are positionable at a spacing from one another, forming an intermediate space,
• wherein at least one of the end surfaces of the two control sliders has a sealing edge surface that is adjacent to the slider compression wall surfaces and, on an opposite side of the sealing edge surface to the slider compression wall surfaces, an inner surface that is adjacent to the sealing edge surface and set back in relation thereto,
• wherein, in the combined position of the two control sliders, the inner surface that is set back from the sealing- edge surface forms with an opposing end surface a gap space that is connected to an inflow chamber delimited by the two control sliders in the combined position and is at the same level of pressure as the inflow chamber, wherein the inner surface and the opposing end surface are respectively provided by different members of the two control sliders, and
• wherein, in the combined position of the two control sliders, the inflow chamber is connected to the low-pressure chamber of the compressor housing in that, in the combined position, an outflow outlet in one of the two control sliders is arranged to overlap with an outflow opening in the slider channel.