Patents Assigned to Danfoss Compressors GmbH
  • Publication number: 20060131977
    Abstract: The invention provides a rotor for an electrical motor. The rotor comprises both a squirrel cage and a number of magnets and can be inserted e.g. in a line-start motor. To secure the magnets in cavities in a core of the rotor, an end plate is attached to one axial end face by rivet means, and to simplify manufacturing of the rotor, the rivet means forms part of at least one of the short circuit rings of the squirrel cage.
    Type: Application
    Filed: December 19, 2005
    Publication date: June 22, 2006
    Applicant: Danfoss Compressors GmbH
    Inventors: Niels Weihrauch, Peter Andersen
  • Publication number: 20060133943
    Abstract: The invention concerns a piston compressor cylinder arrangement (1), particularly for a hermetically enclosed refrigerant compressor, with a cylinder body (2) and a cylinder head arrangement (7), the cylinder body (2) having a first front side (6) in the area of the cylinder head arrangement (7) and a second front side (8) at the other end. It is endeavoured to manufacture such a cylinder arrangement in a cost-effective manner without having to fear for a deformation during mounting. For this purpose, a cup-shaped mounting sleeve (9) surrounds the cylinder body (2) over its full axial working length with a radial distance on all sides.
    Type: Application
    Filed: October 17, 2005
    Publication date: June 22, 2006
    Applicant: Danfoss Compressors GmbH
    Inventors: Marten Nommensen, Frank Iversen, Heinz Lassen, Beate Sonksen
  • Publication number: 20060131980
    Abstract: The invention provides a rotor for an electrical motor, a tool for making a rotor core and a method of making the rotor. The rotor could be incorporated e.g. in a line-start motor and comprises a squirrel cage and magnet located in a rotor core. The magnets are, in one end of the rotor, secured by an end plate with apertures which are larger than the magnet openings, and the end plate is indexed relative to the magnet slots such that a first portion of openings into the magnet slots is in communication with the aperture and such that a remaining, second, portion of the magnet slots is covered by the end plate. In one aspect, the end plate forms an integrated part of the rotor core and comprises openings cooperating with conductor slots to form through-going passages for conductors of the squirrel cage. In that way, the end plate is held in a completely fixed position by the squirrel cage which is moulded directly onto the core and into the conductor slots.
    Type: Application
    Filed: December 19, 2005
    Publication date: June 22, 2006
    Applicant: Danfoss Compressors GmbH
    Inventors: Niels Weihrauch, Peter Andersen
  • Publication number: 20060082236
    Abstract: The invention relates to a rotor for an electric motor, particularly an electric line-start motor, comprising axially accommodating spaces (4 to 6) for conductor rods, and axially extending receiving spaces (10, 11) for permanent magnets (14, 15), which are-designed and located in such a way that they generate a permanent magnet field with a magnet axis (22) and a neutral axis (23). The aim of the invention is to ensure that the rotor runs as regularly as possible during the operation of the electric motor. To this end, the diameter of the rotor along the magnet axis is larger than that along the neutral axis (23).
    Type: Application
    Filed: December 12, 2003
    Publication date: April 20, 2006
    Applicant: DANFOSS COMPRESSORS GMBH
    Inventor: Niels Weihrauch
  • Publication number: 20060067844
    Abstract: The invention concerns a piston compressor (1), particularly a hermetical refrigerant compressor, with a compression chamber (2), which is bordered by a cylinder (3), a piston (4) and a valve plate arrangement (5), which has a suction valve arrangement (14, 15) and a pressure valve arrangement (16, 17). It is endeavoured to provide a piston compressor with a good efficiency. For this purpose, it is ensured that the suction valve arrangement (14, 15) opens into the compression chamber (2) in a central area of the cylinder (3) and the pressure valve arrangement (16, 17) has a plurality of pressure openings (16), which are located in an annular area surrounding the suction valve arrangement (14, 15).
    Type: Application
    Filed: September 27, 2005
    Publication date: March 30, 2006
    Applicant: Danfoss Compressors GmbH
    Inventor: Frank Iversen
  • Patent number: 6976559
    Abstract: The invention relates to a piston compressor, particularly a hermetically enclosed refrigerant compressor, with a crank drive, having a crank shaft with an eccentric crank pin and an oil channel arrangement, and a connecting rod with a first piston-side connecting rod eye and a second pin-side connecting rod eye, said eyes having between them a connecting rod shank with a longitudinal channel, which opens into the connecting rod eyes. In this compressor, it is endeavoured to improve the lubricating conditions. For this purpose a bearing element is arranged between the crank pin and the second connecting rod eye, which is unrotatably connected with the second connecting rod eye under formation of an oil channel, the longitudinal channel communicating with the oil channel and a control arrangement being provided, which ensures a communication between the oil channel and the oil channel arrangement at least once per rotation of the crank pin.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: December 20, 2005
    Assignee: Danfoss Compressors GmbH
    Inventors: Frank Holm Iversen, Preben Bjerre
  • Publication number: 20050275298
    Abstract: The invention concerns a method for mounting a drive shaft (19) of a compressor, particularly a hermetical refrigerant compressor, which has a motor with a stator (1) and a rotor (23), connected with the drive shaft (19) and located in a rotor opening (4) of the stator (1), a first bearing support (8) and a second bearing support (29) being connected with the stator (1), a first bearing (15) for the drive shaft (19) being mounted in the first bearing support (8) and a second bearing (28) for the drive shaft (19) being mounted in the second bearing support (29). It is endeavoured to provide a method for mounting a drive shaft, in which the use of components with relatively large manufacturing tolerances will still result in a good alignment of the drive shaft in relation to the stator. For this purpose, at least the first bearing support (8) is provided with a positioning stop for the first bearing (15) after mounting the first bearing support (8) on the stator (1).
    Type: Application
    Filed: May 24, 2005
    Publication date: December 15, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Frank Iversen, Heinz Lassen, Marten Nommensen, Christian Petersen, Beate Sonksen
  • Publication number: 20050275305
    Abstract: The invention concerns a rotor arrangement for an electrical drive motor of a compressor, particularly a refrigerant compressor, with a rotor (15) having a rotor lamination (20) of stacked sheet plates, and a shaft (8), which is inserted in an axial recess (18) of the rotor lamination (20) and is unrotatably connected with the rotor lamination (20), the recess (28) being formed by openings in adjacent sheet plates (23, 25). It is endeavoured to simplify the manufacturing of such rotor arrangements. For this purpose, it is ensured that openings (24, 26) of different sizes are provided in the sheet plates (23, 15) at least two sheet plates (23) forming a first group, each having an opening (24), which is smaller than the cross-section of the shaft (8), the remaining sheet plates (25) forming a second group, each having an opening (26), which is larger than the cross-section of the shaft (8).
    Type: Application
    Filed: May 10, 2005
    Publication date: December 15, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Marten Nommensen, Frank Iversen, Heinz Lassen, Christian Petersen, Beate Sonksen
  • Publication number: 20050218748
    Abstract: The invention concerns a stator for a line-start electric motor, with a rotor accommodating chamber, in which a rotor is accommodated to be rotatable, and which has accommodating chambers for conducting rods and accommodating chambers for permanent magnets, and with a stator winding comprising several windings, which, during operation of the line-start electric motor under the influence of the rotor, generate a magnetic field with a main axis. In order to increase the efficiency of the line-start electric motor, the rotor accommodating chamber has no constant inner radius, but, in the area of a vertical to the main axis, has a larger inner radius than in the adjacent areas.
    Type: Application
    Filed: February 28, 2005
    Publication date: October 6, 2005
    Applicant: Danfoss Compressors GmbH
    Inventor: Niels Weihrauch
  • Publication number: 20050168188
    Abstract: The invention concerns a starter for a line start electric motor having at least one main winding (4) and at least one start winding (12) and which start winding is connected in series with a run capacitor (14) with which a start capacitor (17) and a PTC-thermistor (19) are connected in parallel. In order to make a simply constructed starter for a line start electric motor the start capacitor (17) and the PTC-thermistor (19) are connected in series with a switch mechanism (20). The series connected circuit made up of the start capacitor (17), the PTC-thermistor (19) and the switch mechanism (20) is connected in parallel with the run capacitor (14).
    Type: Application
    Filed: January 28, 2005
    Publication date: August 4, 2005
    Applicant: Danfoss Compressors GmbH
    Inventor: Niels Weihrauch
  • Publication number: 20050166625
    Abstract: A refrigerating apparatus (3) for a refrigerator (1) has an electrical voltage supply (7) and an electrical interface for connection with components of the refrigerator (1) with the interface having a galvanic isolation between an input arrangement connected with the refrigerating apparatus (3) and an output arrangement connected with at least one component of the refrigerator (1).
    Type: Application
    Filed: January 13, 2005
    Publication date: August 4, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Carsten Rothmann, Ole Bachmann
  • Publication number: 20050155489
    Abstract: The invention concerns a piston arrangement having a piston with a piston head and a piston skirt with a circumferential surface, and a connecting rod, which is connected with the piston via a ball joint comprising a ball, and penetrated by an oil supply channel, which is connected with a bearing surface of the ball joint.
    Type: Application
    Filed: December 1, 2004
    Publication date: July 21, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Christian Petersen, Heinz Lassen, Marten Nommensen, Frank Iversen
  • Publication number: 20050135955
    Abstract: The invention concerns a refrigerant compressor arrangement with a compressor having a suction inlet, a casing, in which the compressor is located, a suction socket, which is in communication with the casing, a suction opening in the casing, which is connected with the suction socket, and a telescopic pipe, which is located between the suction inlet and the suction opening in the casing. It is endeavoured to manufacture a refrigerant compressor arrangement in a cost-effective manner. For this purpose, the suction opening is surrounded by a drawing through in the casing wall, whose inner wall forms a sliding surface for the telescopic pipe.
    Type: Application
    Filed: December 13, 2004
    Publication date: June 23, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Frank Iversen, Marten Nommensen, Heinz Lassen, Christian Petersen
  • Publication number: 20050123411
    Abstract: The invention concerns a piston compressor with a piston, which is connected with a crank pin of a drive shaft via a connecting rod having a longitudinal channel. It is endeavoured to make the manufacturing of a piston compressor cost effective. For this purpose, it is ensured that the shaft of the connecting rod is made as a sheet metal pipe.
    Type: Application
    Filed: December 1, 2004
    Publication date: June 9, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Christian Petersen, Heinz Lassen, Marten Nommensen, Frank Iversen
  • Publication number: 20050120876
    Abstract: The invention concerns a piston arrangement having a piston with a piston head and a piston skirt and a connecting rod, which is connected with the piston via a ball joint arrangement comprising a ball, the ball being held in the piston by means of a safety element.
    Type: Application
    Filed: December 1, 2004
    Publication date: June 9, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Christian Petersen, Heinz Lassen, Marten Nommensen, Frank Iversen
  • Patent number: 6845843
    Abstract: The invention concerns a suction muffler for a refrigerating machine with a housing, in which at least one chamber is arranged and which has an inlet opening (7), an outlet opening and an oil discharge opening. It is endeavoured to avoid that too much oil remains in the chamber. For this purpose, an oil collecting room is arranged to be connected to the bottom end of the chamber, the oil discharge opening being arranged at the bottom end of said oil collecting room.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: January 25, 2005
    Assignee: Danfoss Compressor GmbH
    Inventors: Christian Svendsen, Jens Erik Nissen, Morten Svendsen
  • Publication number: 20050008517
    Abstract: The invention concerns a piston compressor, particularly a hermetic refrigerant compressor, with a compression chamber, which is limited by a valve plate arrangement having a valve plate with a suction gas opening and a pressure gas opening, a suction valve plate with a suction valve element, and a pressure valve plate with a pressure valve element. It is endeavoured to achieve a good efficiency combined with a simple assembly. For this purpose, it is ensured that the pressure valve plate and the suction valve plate are located on the side of the valve plate facing the compression chamber.
    Type: Application
    Filed: May 17, 2004
    Publication date: January 13, 2005
    Applicant: Danfoss Compressor GmbH
    Inventors: Frank Iversen, Marten Nommensen
  • Publication number: 20050006172
    Abstract: The invention concerns a suction muffler for a hermetic refrigerant compressor with a housing having an inlet and an outlet and limiting at least one muffling chamber, and a gas supply channel located in the muffling chamber between the inlet and the outlet. It is endeavoured to prevent too much oil from remaining in the refrigerant gas flow. For this purpose, the gas supply channel forms a throttling path and ends in the muffling chamber, and that in the area of the inlet of the gas supply channel an oil extraction opening is located, which ends in the muffling chamber.
    Type: Application
    Filed: May 13, 2004
    Publication date: January 13, 2005
    Applicant: Danfoss Compressor GmbH
    Inventors: Jan Thomsen, Preben Bjerre, Christian Svendsen, Morten Svendsen, Klaus Reinwand
  • Publication number: 20050002811
    Abstract: The invention relates to a cylinder head arrangement for a piston compressor, particularly for a hermetically enclosed refrigerant compressor, with a valve plate, a suction gas channel, a discharge chamber and a retainer element for a discharge valve. It is endeavoured to improve the efficiency of the piston compressor. For this purpose, it is ensured that the suction gas channel and the discharge chamber are arranged on different sides of the retainer element.
    Type: Application
    Filed: September 19, 2003
    Publication date: January 6, 2005
    Applicant: Danfoss Compressors GmbH
    Inventors: Peter Froeslev, Frank Iversen
  • Publication number: 20050002798
    Abstract: The invention concerns a refrigerant compressor with a motor, a compressor driven by the motor, and a muffling device having at least one muffler with a housing. It is endeavoured to reduce the thermal influence of suction gas in the refrigerant compressor. For this purpose, it is ensured that the housing has at least one outer wall, which is made of a foamed plastic.
    Type: Application
    Filed: May 13, 2004
    Publication date: January 6, 2005
    Applicant: Danfoss Compressor GmbH
    Inventors: Preben Bjerre, Frank Iversen