Abstract: An automatically controlled washing machine includes a laundry drum and a drive motor which drives the laundry drum at a plurality of different speeds for washing, rinsing and spinning. The speed of the drive motor is adjustable with an rpm control circuit and is determinable in accordance with set-point and actual rpm values. A control circuit of the washing machine can receive a signal during a spin cycle, which is a measure for an undesired braking of the drum (for instance from suds production) and is determined by a mutual ratio of the following operating parameters of the drive motor: the set-point rpm, the actual rpm, and a load-dependent electrical variable, such as a motor current.
Type:
Grant
Filed:
April 8, 1996
Date of Patent:
July 15, 1997
Assignee:
Bosch-Siemens Hausgeraete GmbH
Inventors:
Frank Boldt, Ingo Schulze, Harald Moschutz, Marianne Rohl
Abstract: An automatic front-loading washing machine includes a tub having a lower portion, a lowest point and a fill opening with an air inlet neck. A tub drain is connected to the lowest point of the tub. A detergent dispenser has a multiplicity of chambers. A detergent supply line leads into the lower portion of the tub. A closed air recirculation circuit is associated with the tub for drying and includes a waste air conduit leading out of the tub and having a condensation device, a blower, a heating conduit, and an air inlet conduit opening into the air inlet neck to the fill opening of the tub. The waste air conduit and the detergent supply line are one component and dehumidified waste air is carried outside the chambers through the detergent dispenser to the blower.
Abstract: A washing machine includes a perforated washing drum with a contact rpm at which items of laundry in the washing drum come to rest against a surface of the washing drum due to centrifugal force. The washing drum is intermittently driven in alternating rotary directions (reversing mode) during washing and/or rinsing, for accelerating the washing drum in one of the rotary directions to a first rpm being markedly below the contact rpm and accelerating the washing drum in the other of the rotary directions to a second rpm being markedly above the contact rpm.
Type:
Grant
Filed:
March 31, 1994
Date of Patent:
October 1, 1996
Assignee:
Bosch-Siemens Hausgeraete GmbH
Inventors:
Gunter Wentzlaff, Ingo Schulze, Harald Moschutz, Gundula Czyzewski
Abstract: A method for determining an amount of laundry in an at least approximately horizontally supported drum for laundry being driven by a universal drive motor at a washing and drying rpm is performed on the basis of observations of parameters of an operation in a laundry handling machine. A drive moment at the drum drive motor is determined during a drum startup phase, for operating the drum at a controlled handling rpm at which the laundry is not held against a wall of the drum by centrifugal force.
Type:
Grant
Filed:
October 26, 1994
Date of Patent:
April 16, 1996
Assignee:
Bosch-Siemens Hausgeraete GmbH
Inventors:
Peter Blauert, Frank Boldt, Martina Wobkemeier, Paul T. Pilgram, Ulrich Rehfuess
Abstract: A method for determining a mass of wet laundry in a washing machine drum being driven by an rpm-controlled universal motor is performed with the aid of controller variables. The drum is operated before and/or during a spin cycle within first, second and third phases in a mass determining segment. The drum is operated in the first phase with a delayed rpm rise up to a final rpm above an application rpm at which the laundry is applied to a wall of the drum, and near but below a resonant rpm of a drive system. The drum is operated in the second phase with a constant command rpm equal to the final rpm of a ramp. The drum is operated in the third phase with an rpm running down to a minimum rpm without being driven, and with the rpm still being high enough to prevent a previously developed ring of laundry from separating or more than slightly separating from the drum wall.
Type:
Grant
Filed:
October 25, 1994
Date of Patent:
April 16, 1996
Assignee:
Bosch-Siemens Hausgeraete GmbH
Inventors:
Peter Blauert, Frank Boldt, Martina Wobkemeier, Paul T. Pilgram, Ulrich Rehfuess
Abstract: An oven, particularly with an apparatus for pyrolytic self cleaning, includes an oven wall having an exhaust opening formed therein through which exhaust produced during oven operation can flow out to the outside. A throttle automatically adjusts an exhaust flow cross section of the exhaust opening or of a flow conduit adjoining the exhaust opening.
Abstract: A clothes dryer includes a housing, a back wall being joined to the housing, an at least approximately horizontally rotatably supported laundry drum having at least one bottom, and a bearing journal supporting the at least one bottom on the back wall. The bearing journal has a spherical bearing-relevant surface being secured to the back wall. The drum bottom has at least one bearing shell tightly embracing the spherical surface.
Abstract: A cooktop includes an at least partially transparent surface formed of glass or glass ceramic and having burner regions with peripheral and inner portions. Heating elements are disposed beneath the surface in the vicinity of the burner regions. A lighting apparatus visually indicates a temperature of the surface which exceeds a predetermined temperature at which the surface is permitted to be touched. The lighting apparatus has a temperature-dependent switch thermally coupled to the surface. The light devices controlled by the switch. Each of the light devices is disposed in one of the portions of a respective one of the burner regions.
Abstract: A dishwasher equipped for single-phase alternating current connection, in particular a dishwasher for typical designated use in a household, includes a recirculating pump for wash water and rinse water with which items to be cleaned are acted upon under a spray pressure. A three-phase rotary current motor drives the recirculating pump. An electronically controlled single-phase AC/three-phase rotary current/frequency inverter impresses current on the three-phase rotary current motor.
Type:
Grant
Filed:
August 16, 1993
Date of Patent:
July 4, 1995
Assignee:
Bosch-Siemens Hausgeraete GmbH
Inventors:
Richard Graf, Uwe Kampet, Bernd-Peter Herrmann
Abstract: A water-conducting cleaning machine, in particular a household dishwasher or a household washing machine, has a processing vessel. A device for repeated, automatic metering of doses of a powdered detergent includes a detergent holder having an interior and an outlet opening. A metering and dispensing device is associated with a duct, is disposed below the outlet opening and has at least one indentation with an interior for receiving individual doses of a powdered detergent from the outlet opening and for feeding the individual doses to the processing vessel in a dispensing position. A compressed air generator generates a flow of compressed air continuously acting upon the interior of the detergent holder and upon the duct, and acting upon the interior of the indentation in the dispensing position.