Patents by Inventor Hans-Joachim Krauss
Hans-Joachim Krauss has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9638476Abstract: The invention relates to a plate-shaped heat exchanger for a cooling device comprising at least one heat exchanger package, in particular for a motor vehicle, consisting of a plurality of openings for accommodating a pipe conducting a coolant, wherein each opening is surrounded by an passage and a plurality of projections are distributed between the passages for the heat exchange with the medium to be cooled. In order to allow a high performance increase of a cooling device, yet a low increase in pressure loss of the charge air, a plurality of projections are arranged around an passage, wherein the projections have a shape that assures deliberate heat conduction from the projections to the passage.Type: GrantFiled: August 4, 2011Date of Patent: May 2, 2017Assignee: MAHLE INTERNATIONAL GMBHInventors: Boris Kerler, Steffen Grözinger, Mehmet Tosun, Christian Schnepf, Florian Schmidt, Hans-Joachim Krauss, Vinko Lukcin, Stéphanie Larpent
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Patent number: 8590607Abstract: A heat exchanger includes a tube with a heat-exchange passage and an end piece. The heat-exchange passage directs the flow of a first medium and includes a first flow section and a second flow section arranged in parallel. The end piece has a tube plate that includes a base plate, a diverter plate, and a cover plate. An end of the tube connects to the base plate. The diverter plate has a cutout that forms a diverter passage. The cover plate lies adjacent to the diverter plate and covers the diverter passage in a fluid-tight manner. A second medium flows exterior to the heat-exchange passage.Type: GrantFiled: January 8, 2009Date of Patent: November 26, 2013Assignee: Behr GmbH & Co. KGInventors: Walter Demuth, Martin Kotsch, Michael Kranich, Hans Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter
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Publication number: 20130264038Abstract: The invention relates to a plate-shaped heat exchanger for a cooling device comprising at least one heat exchanger package, in particular for a motor vehicle, consisting of a plurality of openings for accommodating a pipe conducting a coolant, wherein each opening is surrounded by an passage and a plurality of projections are distributed between the passages for the heat exchange with the medium to be cooled. In order to allow a high performance increase of a cooling device, yet a low increase in pressure loss of the charge air, a plurality of projections are arranged around an passage, wherein the projections have a shape that assures deliberate heat conduction from the projections to the passage.Type: ApplicationFiled: August 4, 2011Publication date: October 10, 2013Applicants: MAHLE BEHR INDUSTRY GMBH & CO. KG, BEHR GMBH & CO. KGInventors: Boris Kerler, Steffen Grözinger, Mehmet Tosun, Christian Schnepf, Florian Schmidt, Hans-Joachim Krauss, Vinko Lukcin, Stéphanie Larpent
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Patent number: 7650935Abstract: The invention relates to a heat exchanger comprising tubes (2, 3) that can be flown through along a number of hydraulically parallel flow paths (2c, 2d) that are comprised of sections.Type: GrantFiled: December 19, 2002Date of Patent: January 26, 2010Assignee: BEHR GmbH & Co. KGInventors: Walter Demuth, Martin Kotsch, Michael Kranich, Hans Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter
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Publication number: 20090126920Abstract: Disclosed herein is a heat exchanger with tubes (1) and at least one end piece, which has a tube bottom that, in turn, has a bottom plate (8), a baffle plate (12) and a covering plate (16).Type: ApplicationFiled: January 8, 2009Publication date: May 21, 2009Inventors: Walter Demuth, Martin Kotsch, Michael Kranich, Hans Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter
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Patent number: 7481266Abstract: Disclosed herein is a heat exchanger with tubes (1) and at least one end piece, which has a tube bottom that, in turn, has a bottom plate (8), a baffle plate (12) and a covering plate (16).Type: GrantFiled: December 19, 2002Date of Patent: January 27, 2009Assignee: Behr GmbH & Co. KGInventors: Walter Demuth, Martin Kotsch, Michael Kranich, Hans Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter
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Patent number: 7146819Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (TS) with the pressure being outside a predefinable intended pressure range ([pu,po]).Type: GrantFiled: February 10, 2004Date of Patent: December 12, 2006Assignee: BEHR GmbH & Co.Inventors: Walter Demuth, Rainer Heilig, Volker Kirschner, Martin Kotsch, Hans-Joachim Krauss, Hagen Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Publication number: 20060248906Abstract: The invention relates to a simplified air conditioning system (1) for a motor vehicle, comprising a flow channel (4) for an air stream (2) to be conditioned. According to the invention, said system is provided with a circuit (8) which can be operated in a cooling mode or in a heating mode and is used to circulate a fluid (F) for conditioning the air stream (2). In the heating mode, the circuit comprises an compressor (26), a heat exchanger (24), and an intermediate reservoir (28), and is controlled in such a way that the suction pressure of the compressor (26) at least partially exceeds a saturated vapour pressure in the circuit, caused by the ambient temperature.Type: ApplicationFiled: October 31, 2003Publication date: November 9, 2006Inventors: Roland Burk, Gunther Feuerecker, Andreas Kemle, Hans-Joachim Krauss, Ottokar Kunberger, Thomas Strauss, Hans-Martin Stuck
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Patent number: 6993838Abstract: The invention relates to a collector tube (1) for a heat transfer unit. The tube comprises one or several slits (3d) on the periphery thereof, whereby said slits are formed by a punch press without an inner die or by high-pressure shaping for inserting a respective flat tube. The invention also relates to a method for producing said collector tube (1). According to the invention, a collector tube (1) is provided with an outer radius (D/2) to tube wall thickness (s) ratio of less than 5. The slits (3d) are introduced preferably parallel to, or at an acute 2 angle to the longitudinal axis of the tube. The collection tube can be produced by bending a flat material and subsequently sealing the longitudinal slits arising from the bending process by soldering or welding. Said collector tube can be used, e.g. for gas coolers and evaporators for CO2 air conditioning systems in motor vehicles.Type: GrantFiled: February 29, 2000Date of Patent: February 7, 2006Assignee: Behr GmbH & Co.Inventors: Karl-Heinz Staffa, Hans-Joachim Krauss, Hagen Mittelstrass, Christoph Walter, Bernd Dienhart
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Patent number: 6953325Abstract: A safety device limits the pressure in an axial-piston compressor with variable piston displacement. The compressor has as wobble plate or swash plate whose tilt angle can be variably controlled by the pressure differential between the high pressure in the discharge pressure zone and the pressure in the piston-drive chamber. The safety device consists of a valve arranged in a connector channel between the discharge pressure zone and the pressure zone of the piston-drive chamber. When the discharge pressure exceeds a given pressure limit, the safety device responds by allowing an increased flow of pressure medium from the discharge pressure zone to the piston-drive chamber. The influx of pressure medium into the piston-drive chamber causes a reduction of the tilt angle of the swash plate or wobble plate.Type: GrantFiled: January 6, 2003Date of Patent: October 11, 2005Assignees: LuK Fahrzeug-Hydraulik GmbH & Co., KG, Behr GmbH & Co.Inventors: Georg Weber, Michael Sickelmann, Tilo Schäfer, Christoph Walter, Hans-Joachim Krauss, Harald Raiser, Frank Obrist
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Patent number: 6843312Abstract: An air conditioning system has a refrigerant cycle, a coolant cycle, a refrigerant/coolant heat exchanger, coupling these cycles so as to transfer heat, and a valve for operating mode-dependent control of the refrigerant flow, whereby the air conditioning system can be operated not only in air conditioning mode but also in a heat pump or reheat mode. An internal combustion engine exhaust gas/coolant heat exchanger is connected upstream in series to the refrigerant/coolant heat exchanger in the coolant cycle in the heat pump mode; and/or in the reheat operating mode the refrigerant/coolant heat exchanger functions as a condenser/gas cooler, connected upstream in series on the coolant side to the supply air/coolant heat exchanger. In addition or as an alternative, a drying operating mode can be provided for drying the supply air/refrigerant heat exchanger with reversed air conveying direction.Type: GrantFiled: February 15, 2001Date of Patent: January 18, 2005Assignee: Behr GmbH & Co.Inventors: Roland Burk, Hans-Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6810949Abstract: A multiblock heat-transfer system including a first heat-transfer unit and at least a second heat transfer unit mounted onto the first heat-transfer unit. The first heat transfer unit contains a first heat-transfer tubular block with at least a first collecting chamber at the side. The second heat-transfer unit contains a second heat-transfer tubular block with at least a second collecting chamber at the side. The first and second collecting chamber each consist of their own collecting pipe, and both collecting pipes are inserted into each other at their front faces and are connected in a fluid-tight manner. In the pipe connection area, the external diameter of one of the collecting pipes approximately matches the internal diameter of the other collecting pipe, and a transverse partition is provided for separating the two collecting chambers.Type: GrantFiled: January 7, 2002Date of Patent: November 2, 2004Assignee: BEHR GmbH & Co.Inventors: Karl-Heinz Staffa, Hans-Joachim Krauss, Hagen Mittelstrass, Christoph Walter, Bernd Dienhart, Jochen Schumm
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Publication number: 20040159114Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (Ts) with the pressure being outside a predefinable intended pressure range ([pu,po]).Type: ApplicationFiled: February 10, 2004Publication date: August 19, 2004Applicant: BEHR GmbH & CO.Inventors: Walter Demuth, Rainer Heilig, Volker Kirschner, Martin Kotsch, Hans-Joachim Krauss, Hagen Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6772518Abstract: The invention relates to a method for forming at least one flat-tube insertion slot in a header tube. A sawcut is introduced into the header tube during a sawing step, and the slot is configured, during a subsequent punching step, by means of a slot punch, which punches into the region of the sawcut. A rimmed opening can be configured during the punching step by using a slot punch with a larger width and/or length relative to the sawcut. The sawcut is preferably introduced to a depth less that the wall thickness of the header tube. The respective web region(s) between chamber of a multi-chamber header tube can be compressed during the punching operation to a level lower than that of a header-tube wall region functioning as a flat-tube insertion stop, in order to form a chamber-connecting duct.Type: GrantFiled: January 22, 2002Date of Patent: August 10, 2004Assignee: Behr GmbH & Co.Inventors: Walter Demuth, Wolfgang Geiger, Martin Kotsch, Hans-Joachim Krauss, Hagen Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6751983Abstract: The invention relates to an air conditioning unit with a coolant circuit which consists of a compressor, an evaporator, a collector located at the low pressure side between the evaporator and the compressor and an inner heat transfer unit with a beat transfer channel located at the high pressure side and a low pressure side beat transfer channel. According to the invention, the inner heat transfer unit has an at least segmentally spiraling and/or spiral-shaped steps between the outer and inner pipe of a coaxial pipe system.Type: GrantFiled: October 1, 2002Date of Patent: June 22, 2004Assignee: Behr GmbH & Co.Inventors: Bernd Dienhart, Hans-Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter, Bernd Kallfass
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Publication number: 20040103535Abstract: The invention relates to a method for forming at least one flat-tube insertion slot in a header tube. A sawcut is introduced into the header tube during a sawing step, and the slot is configured, during a subsequent punching step, by means of a slot punch, which punches into the region of the sawcut. A rimmed opening can be configured during the punching step by using a slot punch with a larger width and/or length relative to the sawcut. The sawcut is preferably introduced to a depth less that the wall thickness of the header tube. The respective web region(s) between chamber of a multi-chamber header tube can be compressed during the punching operation to a level lower than that of a header-tube wall region functioning as a flat-tube insertion stop, in order to form a chamber-connecting duct.Type: ApplicationFiled: November 21, 2003Publication date: June 3, 2004Applicant: BEHR GmbH & Co.Inventors: Walter Demuth, Wolfgang Geiger, Martin Kotsch, Hans-Joachim Krauss, Hagen Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6708508Abstract: The invention relates to a method of refrigerant level monitoring in a refrigerant circuit of an air-conditioning or heat-pump system having a compressor and a refrigerant which may, depending on the operating point, be operated in the supercritical range. The method includes standstill level monitoring with the compressor switched off and/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registered and, in the event of excessive overheat, it is concluded that there is underfilling. At a standstill, the pressure and temperature of the refrigerant are registered, and it is concluded that there is an improper refrigerant filling level if the pressure (pKM) lies below a minimum pressure value (pmin) or the temperature (TKM) lies above a maximum saturation temperature value (TS) with the pressure being outside a predefinable intended pressure range ([pu,po]).Type: GrantFiled: December 11, 2001Date of Patent: March 23, 2004Assignee: Behr GmbH & Co.Inventors: Walter Demuth, Rainer Heilig, Volker Kirschner, Martin Kotsch, Hans-Joachim Krauss, Hagen Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6705386Abstract: The invention relates to a serpentine heat exchanger having a first serpentine tube block (12a) comprising one or more adjacent first serpentine tube sections with parallel through-flow and a second serpentine tube block (12b) disposed behind the first and comprising one or more adjacent second serpentine tube sections with parallel through-flow. According to the invention, at least one of the second serpentine tube sections is connected in series for flow purposes via a diversion section (10, 11) to a first serpentine tube section lying adjacent thereto.Type: GrantFiled: October 5, 2001Date of Patent: March 16, 2004Assignee: Behr GmbH & Co. StuttgartInventors: Walter Demuth, Martin Kotsch, Hans-Joachim Krauss, Hagan Mittelstrass, Harald Raiser, Michael Sickelmann, Karl-Heinz Staffa, Christoph Walter
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Patent number: 6662864Abstract: An air-conditioning system is designed at least for an air-conditioning mode for cooling a thermal control medium (13) and a heat-pump mode for heating the thermal control medium. The system comprises a refrigerant circuit with a compressor (1) and an evaporator (8), a coolant circuit with a heat-generating unit (10) to be cooled and a heater (12) for heating the thermal control medium, and also a first refrigerant/coolant heat exchanger (3) functioning on the refrigerant side as a condenser/gas cooler. The evaporator is formed by a second refrigerant/coolant heat exchanger (8). A cooling body (14) for cooling the thermal control medium is connected downstream of heat exchanger (8) on the coolant side.Type: GrantFiled: June 15, 2001Date of Patent: December 16, 2003Assignee: Behr GmbH & Co.Inventors: Roland Burk, Hans-Joachim Krauss, Christoph Walter, Marcus Weinbrenner
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Publication number: 20030223883Abstract: A safety device limits the pressure in an axial-piston compressor with variable piston displacement. The compressor has as wobble plate or swash plate whose tilt angle can be variably controlled by the pressure differential between the high pressure in the discharge pressure zone and the pressure in the piston-drive chamber. The safety device consists of a valve arranged in a connector channel between the discharge pressure zone and the pressure zone of the piston-drive chamber. When the discharge pressure exceeds a given pressure limit, the safety device responds by allowing an increased flow of pressure medium from the discharge pressure zone to the piston-drive chamber. The influx of pressure medium into the piston-drive chamber causes a reduction of the tilt angle of the swash plate or wobble plate.Type: ApplicationFiled: January 6, 2003Publication date: December 4, 2003Applicants: LuK Fahrzeug-Hydraulik GmbH & Co. KG, Behr GmbH & Co.Inventors: Georg Weber, Michael Sickelmann, Tilo Schafer, Christoph Walter, Hans-Joachim Krauss, Harald Raiser, Frank Obrist