EP0860141A2 - Liquid detergent dispenser for dishwashers - Google Patents
Liquid detergent dispenser for dishwashers Download PDFInfo
- Publication number
- EP0860141A2 EP0860141A2 EP98200241A EP98200241A EP0860141A2 EP 0860141 A2 EP0860141 A2 EP 0860141A2 EP 98200241 A EP98200241 A EP 98200241A EP 98200241 A EP98200241 A EP 98200241A EP 0860141 A2 EP0860141 A2 EP 0860141A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- detergent
- motor
- reduction unit
- dispenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
- A47L15/4418—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
Definitions
- the present invention relates to a dispenser intended to be installed inside a dishwasher, especially an industrial dishwasher using liquid detergents for cleaning dishes.
- dishwasher dispensers generally contain a peristaltic pump powered by an electric motor.
- the pump draws the detergent out of a tank and pumps it into the wash compartment.
- This electric motor inside the dishwasher is, however, disadvantageous in that it increases the risk of electrical faults, such as short circuits caused by the ingress of water.
- the presence of the electric motor and its control means raises production costs and reduces the reliability of the dishwasher as a whole.
- the dispenser in accordance with the present invention requires neither its own electric motor nor control means for operating it, and is therefore cheaper, safer and more reliable than dispensers currently on the market.
- the dishwasher can be seen to comprise, as in the prior art, a wash compartment 1 containing at least one sprayer 2 for spraying the dishes with water.
- This sprayer is connected via a delivery pipe 3 to a pump 4, preferably a centrifugal pump.
- the pump 4 has an inlet which is connected in turn to a suction pipe 5 carrying water from the wash compartment 1.
- the impeller of the pump 4 is keyed to one end of the shaft 6 of an electric motor 7.
- the dispenser according to the present invention conveniently comprises a speed reduction unit 8 alongside the motor 7 on the opposite side from the pump 4, and the rotary motion of the shaft 6 is stepped down by this unit 8.
- this speed reduction unit comprises a gear train composed of at least two gears in mesh with each other, but in other embodiments of the dispenser according to the present invention the reduction unit 8 may of course contain other transmission components capable of reducing the number of revolutions of the drive shaft 6.
- the impeller of a pump 10 Keyed to the driven shaft 9 of the reduction unit 8 is the impeller of a pump 10 which in the present embodiment is of the peristaltic type having a hose.
- the pump 10 draws the liquid detergent contained in a tank 11 through a feed pipe 12 which preferably has a valve 13 for regulating the flow rate.
- the diameter of the hose of the pump 10 and of the impeller of the pump 10, and also the transmission ratio of the speed reduction unit 8, are determined as a function of the number of revolutions of the motor 7 when running steadily, so that the amount of detergent injected by the pump 10 into the compartment 1 during the entire period of operation of the motor 7 is approximately the amount of detergent necessary for one washing cycle.
- the dispenser according to the present invention starts to operate as soon as the motor 7 of the water pump 4 is turned on.
- the rotation of the shaft 6 of this motor is stepped down and transmitted by the speed reduction unit 8 to the pump 10, which draws the detergent from the tank 11 and pumps it into the wash compartment 1.
- the direction of flow of the water and detergent through the pipes of the dishwasher while the motor 7 is running is indicated in Fig. 1 by a series of arrows.
- the pump 10 obviously continues to pump detergent into the wash compartment 1 until the motor 7 is turned off.
- means may be provided for mechanically uncoupling the pump 10 from the motor 7 so that the pump is running only during certain periods of operation of the motor.
- Some dishwashers comprise not only a pump for pumping the water used during the washing of the dishes but also another pump for water used to rinse the dishes.
- the speed reduction unit 8 may therefore be connected mechanically to the motor of the rinsing pump instead of to the washing pump.
Landscapes
- Washing And Drying Of Tableware (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims (7)
- Liquid detergent dispenser that comprises a pump (10) for drawing the detergent from a tank (11) and pumping it into the wash compartment (1) of a dishwasher, which in turn comprises at least one other pump (4) driven by a motor (7) for pumping water into this wash compartment (1), the said dispenser being characterized in that the shaft (6) of the motor (7) of the water pump (4) is connected mechanically to a speed reduction unit (8) whose driven shaft (9) is connected mechanically to the impeller of the detergent pump (10).
- Dispenser according to the preceding claim, characterized in that the impeller of the water pump (4) is mounted on the drive shaft (6) of the speed reduction unit (8).
- Dispenser according to one of the preceding claims, characterized in that the impeller of the detergent pump (10) is mounted on the driven shaft (9) of the speed reduction unit (8).
- Dispenser according to one of the preceding claims, characterized in that the speed reduction unit (8) is positioned between the motor (7) of the water pump (4) and the detergent pump (10).
- Dispenser according to one of the preceding claims, characterized in that the detergent pump (10) is a peristaltic pump.
- Dispenser according to one of the preceding claims, characterized in that the pipe (12) that connects the tank (11) to the detergent pump (10) is provided with a valve (13) for regulating the rate of flow of the detergent in the said pipe (12).
- Dispenser according to one of the preceding claims, characterized in that it comprises means for mechanically uncoupling the motor (7) of the water pump (4) from the detergent pump (10).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI970186 | 1997-01-31 | ||
ITMI970186 IT1290226B1 (en) | 1997-01-31 | 1997-01-31 | DISPENSER OF LIQUID DETERGENT FOR DISHWASHER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0860141A2 true EP0860141A2 (en) | 1998-08-26 |
EP0860141A3 EP0860141A3 (en) | 1999-05-12 |
Family
ID=11375812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98200241A Withdrawn EP0860141A3 (en) | 1997-01-31 | 1998-01-28 | Liquid detergent dispenser for dishwashers |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0860141A3 (en) |
IT (1) | IT1290226B1 (en) |
TR (1) | TR199800151A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7571734B2 (en) | 2005-01-20 | 2009-08-11 | General Electric Company | Fluid dispensing system for a washing device |
US7802335B2 (en) | 2007-10-12 | 2010-09-28 | General Electric Company | Bulk dispense user adjustable controls |
US8056747B2 (en) | 2007-10-12 | 2011-11-15 | General Electric Company | Removable tank for laundry bulk dispenser system |
US8056374B2 (en) | 2007-10-12 | 2011-11-15 | General Electric Company | Multiple compartments wash additives auto-dispenser in washer or dryer pedestal |
US10815605B2 (en) | 2017-10-06 | 2020-10-27 | Whirlpool Corporation | Laundry treating appliance having a bulk dispensing assembly |
US11253135B2 (en) * | 2016-06-01 | 2022-02-22 | Illinois Tool Works Inc. | Motor driven in-door dishwasher aid dispenser |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4218264A (en) * | 1979-03-09 | 1980-08-19 | Federighi George B | Dishwasher utilizing pump impeller suction for feeding detergent, sanitizing agent and rinse aid in timed sequences |
DE3636384A1 (en) * | 1986-10-25 | 1988-04-28 | Licentia Gmbh | Dishwasher or washing machine, in particular for the household, with a metering device for liquid detergent |
DE3704080A1 (en) * | 1987-02-10 | 1988-08-18 | Bosch Siemens Hausgeraete | Flushing-in device for liquid washing agents in a washing machine |
DE3812109A1 (en) * | 1988-04-12 | 1989-10-26 | Schwarzwaelder Uhrwerke Fabrik | Detergent-feeding device for domestic appliances, in particular dishwashers |
DE4125692C1 (en) * | 1991-08-02 | 1993-01-07 | Walcher Messtechnik Gmbh, 7815 Kirchzarten, De | Alternating drive system e.g. for two pumps - has two coaxial drive shafts driven by electromotor alternatingly with auxiliary coupling allowing simultaneous drive via by=pass gearing |
-
1997
- 1997-01-31 IT ITMI970186 patent/IT1290226B1/en active IP Right Grant
-
1998
- 1998-01-28 TR TR1998/00151A patent/TR199800151A2/en unknown
- 1998-01-28 EP EP98200241A patent/EP0860141A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4218264A (en) * | 1979-03-09 | 1980-08-19 | Federighi George B | Dishwasher utilizing pump impeller suction for feeding detergent, sanitizing agent and rinse aid in timed sequences |
DE3636384A1 (en) * | 1986-10-25 | 1988-04-28 | Licentia Gmbh | Dishwasher or washing machine, in particular for the household, with a metering device for liquid detergent |
DE3704080A1 (en) * | 1987-02-10 | 1988-08-18 | Bosch Siemens Hausgeraete | Flushing-in device for liquid washing agents in a washing machine |
DE3812109A1 (en) * | 1988-04-12 | 1989-10-26 | Schwarzwaelder Uhrwerke Fabrik | Detergent-feeding device for domestic appliances, in particular dishwashers |
DE4125692C1 (en) * | 1991-08-02 | 1993-01-07 | Walcher Messtechnik Gmbh, 7815 Kirchzarten, De | Alternating drive system e.g. for two pumps - has two coaxial drive shafts driven by electromotor alternatingly with auxiliary coupling allowing simultaneous drive via by=pass gearing |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7571734B2 (en) | 2005-01-20 | 2009-08-11 | General Electric Company | Fluid dispensing system for a washing device |
US7802335B2 (en) | 2007-10-12 | 2010-09-28 | General Electric Company | Bulk dispense user adjustable controls |
US8056747B2 (en) | 2007-10-12 | 2011-11-15 | General Electric Company | Removable tank for laundry bulk dispenser system |
US8056374B2 (en) | 2007-10-12 | 2011-11-15 | General Electric Company | Multiple compartments wash additives auto-dispenser in washer or dryer pedestal |
US11253135B2 (en) * | 2016-06-01 | 2022-02-22 | Illinois Tool Works Inc. | Motor driven in-door dishwasher aid dispenser |
US10815605B2 (en) | 2017-10-06 | 2020-10-27 | Whirlpool Corporation | Laundry treating appliance having a bulk dispensing assembly |
US11162207B2 (en) | 2017-10-06 | 2021-11-02 | Whirlpool Corporation | Laundry treating appliance having a bulk dispensing assembly |
Also Published As
Publication number | Publication date |
---|---|
ITMI970186A1 (en) | 1998-07-31 |
EP0860141A3 (en) | 1999-05-12 |
IT1290226B1 (en) | 1998-10-22 |
TR199800151A3 (en) | 1998-08-21 |
TR199800151A2 (en) | 1998-08-21 |
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