US3087504A - Dishwasher - Google Patents

Dishwasher Download PDF

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Publication number
US3087504A
US3087504A US102170A US10217061A US3087504A US 3087504 A US3087504 A US 3087504A US 102170 A US102170 A US 102170A US 10217061 A US10217061 A US 10217061A US 3087504 A US3087504 A US 3087504A
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Prior art keywords
water
dishwasher
conduit
wash water
contact
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Expired - Lifetime
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US102170A
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English (en)
Inventor
Geschka Hugo Werner
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Constructa GmbH
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Constructa GmbH
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    • 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
    • A47L15/4229—Water softening arrangements

Definitions

  • the dishes are placed on a grid or in a basket in a washing space.
  • a sump is provided below the washing space to receive fresh wash water and a chemical cleansing medium to prepare the water for the washing cycle. If the water is to be heated, means may also be provided to heat the sump.
  • a whirlpool wheel may be provided at the bottom of the w-ashing space to throw the prepared wash water continuously against the dishes during the washing cycle whereby dirt is removed from their surfaces.
  • the pump delivers the clean water from the bottom chamber to shower heads so as to spray the Water into the washing space.
  • the complete dish washing cycle usually includes a pre-washing cycle, a main washing cycle, a rinsing cycle and a drying cycle, all of which may be controlled by an automatic programming means or by hand.
  • This object is accomplished by mounting a water softening ion exchanger in the water inlet conduit means leading to the washing space of the dishwasher.
  • Known water softening cation exchangers bind the calcium in hard water and release sodium chloride in -solution in the Water.
  • the ion exchanger is mounted within the casing of the dishwasher.
  • means is provided -for indicating the exhaustion of the ion exchange capacity of the ion exchanger and the indicating means operates a programming means designed to cut off further water supply to the dishwasher and thus to stop its operation upon exhaustion of the ion exchange capacity of the ion exchanger.
  • the indicating means may include a counter indicating the number of washing cycles or a means analysing the chemical composition of the ion exchanger, and the programming means may include a switch responsive to the indicating means 4and operating a solenoid valve in the water inlet conduit means to shut olf water supply upon exhaustion of the ion exch-anger.
  • IlFlG. 2 is a perspective view thereof
  • FIG. 3 is a circuit diagram of an electrical control system of the dishwasher according to this invention.
  • FIG. 4 is a control unit for controlling the ion exchange capacity of the water softener.
  • an automatic dishwasher with a casing 1 holding the dish container 2.
  • the container 2 defines the dish washing space 3 and the wash water chamber 4. Space 3 and chamber 4 are separated by sieve 5 which retains solid particles removed from the dishes by the wash water.
  • a drain outlet pipe ⁇ 6 is mounted on the -bottom of the wash water chamber and communicates with the input of wash water circulation pump 7 the output of which is connected to conduit 8.
  • the conduit or pipe 8 carries one or sever-al shower heads 9 through which the wash water from chamber 4 is forcefully pressed into the washing space 3 during the washing and rinsing cycles.
  • the machine is supplied with water from a water supply source (not shown) through inlet pipe 10 leading to the water inlet conduit 11 which may be opened and closed by solenoid valve 12 in any suitably programmed manner.
  • the inlet conduit leads from ⁇ the valve 12 to a container 13 holding a water softening ion exchange material.
  • the ion exchange material may be any of the well known cation exchange materials used in water-softening processes. Such materials include, by way of example, ion exchange resins with active sulfonic groups which may be converted to the sodium form and will then exchange its sodium ions with the calcium ions present in hard water. Polystyrene -type resins sold by Rohm and Haas Co. under the trademark Amberlite Ill-i are useful for this purpose.
  • O'ther useful cation exchangers include the zeolites which are a class of hydrated silicates of aluminum and sodium compounds of the type Natural zeolites include analcite, chabazite, heulandite, natrolite, stilbite and thompsonite. Artificial zeolites are made in a variety of forms ranging from gelatinous to porous and sandlike. The mineral glauconite has also been found suitable for water softening.
  • any of the known water softening ion exchangers may be used, including natural and synthetic cation exchange minerals as well as organic cation exchangers, such as -sulfonated phenol-formaldehyde resins and carboxylic -acid resins. All of these water softeners being well known, the present invention is not concerned with any such specific material but with its use in a dishwasher, as herein described.
  • the ion exchange Water softener placed in container 13 should have an activity suicient to soften about 8 to l0 liters of water per minute.
  • a conduit 14 connects the container 13 ⁇ with sump 15 which receives 4the softened water from container 13.
  • a feed pipe 17 leads from funnel 18 to the sump whereby a liquid or solid cleansing medium, such as a detergent ⁇ or the like, may be fed to the softened water in sump 15.
  • a liquid or solid cleansing medium such as a detergent ⁇ or the like
  • the sump may also serve for heating the wash water, for which purpose the sump is shown provided with -an electric heating element 16. This, of course, may be eliminate-d if hot water is supplied to the machine.
  • the cleansing medium is fed through funnel 18 into pipe 17 which received a stream of water from inlet pipe through the branch pipe 19 which may be opened or closed by valve 20.
  • the sump 15 is connected with the input of circulating pump 7 by conduit 21.
  • fresh wash water is circulated from sump into conduit 8 and through shower heads 9 into the washing space 3 where the wash water is irnpinged upon lthe dish-es in space 3 and runs off through sieve 5 into the wash water chamber 4.
  • the drain outlet pipe 6 in the chamber 4 returns the wash water to the circulating pump which operates continuously during the main washing cycle -to recirculate the water constantly through the washing space 3.
  • pump 22 which is connected with drain outlet pipe 6 by conduit 23, is actuated to remove the dirty wash water through outlet pipe 24 from the wash water chamber 4.
  • the circulating pump 7 remains inoperative, of course, while pump 22 operates.
  • the container 13, which holds the water softening ion exchanger, is connected with funnel 27 by conduit 25, a pivotal lid 28 being mounted in the cover plate 26 of the casing V1 to open and close access to funnel 27.
  • the ion exchanger requires regeneration and, for this purpose, a sodium chloride solution is fed through funnel 27 and flushed under pressure into container 13 whence calcium-rich water is removed through outlet pipe 29 leading from container 13 and being closable by a valve 29a.
  • the programming means may include a counter 30 indicating the number of times wash water has been recirculated through space 3.
  • a suitable signaling means giving a visible or audible signal to indicate -that the ion exchange capacity of the water softener has been exhausted, is provided, as indicated by signal lamp 33.
  • This signal means is operated by counter 30 after a set number of washing cycles predetermined on the basis of the known capacity of the particular ion exchanger used and when it gives a signal, the ion exchanger is regenerated by flushing a common salt solution through pipe 25 and container 13, the outlet pipe 29 being opened at the outlet valve 29a to remove the resultant calcium-rich water. After regeneration, the counter is returned to its zero setting, for instance manually, by setting element 34.
  • the exhaustion of the ion exchanger also automatically closes olf any further water supply to the machine from inlet pipe 10.
  • the signal means 33 is connected with a relay operating switch 36 which actuates via lines 35 the solenoid valve 12 in inlet pipe 11 so that the valve is closed upon actuation of signal lamp 33, i.e. when the ion exchange capacity of the water softener in container 13 is exhausted.
  • the dishwasher casing 1 has a front wall 32 with a door 31 through which the dishes are placed in washing space 3 of the machine.
  • FIG. 3 shows the circuit diagram of an electrical control system for an automatic dishwasher according to the invention.
  • Electric power is fed .to the dishwasher by power supply lines 42, 44.
  • Valve is connected to power supply lines 42, 44 by lines 46, 48 resp.
  • Line 46 comprises contact 50 of a start butto-n 52.
  • Line 48 comprises a contact 54 actuated by a cam 56 on a shaft 58.
  • the solenoid valve 12 is also connected to power supply lines 42, 44 by connectors 60, 62.
  • Connector 60 comprises a contact 64 of the starting button 52, connector 62 a contact 66 actuated by a cam 68 on the shaft 58.
  • Connector 70 comprises a contact 74 of the starting button 52
  • connector 72 comprises a contact 76 actuated by a cam 78 on the shaft 58.
  • Connector 82 comprises a contact 84 actuated by a cam 86 on the shaft 5S.
  • Connector 90 comprises a contact 92 Iactuated by a cam 94 on the shaft 58.
  • Connector 100 comprises a contact ⁇ 102 actuated by a earn 104 on .the shaft 58.
  • a relay 106 is connected to the power supply lines 42, 44 by connectors 103, 110.
  • Connector 110 comprises a contact 112, actuated by a control unit further to be described.
  • the shaft with ⁇ the cams 56, 68, 78, 86, 94, 104 is connected to a reduction gear ⁇ 116 driven by an electric motor 114.
  • the electric motor 114 is connected by connectors 118', 118 Ito power supply lines 42, 44.
  • Connector 118' comprises a contact 120.
  • This contact 120 is actuated by a level control unit 122.
  • the level control unit 122 comprises a floating body 124 mounted in the wash water chamber 4 (FIG. l).
  • the starting button 52 When the operation of lthe dishwasher is to be started, the starting button 52 is moved to the right in the illustration of FIG. 3. By moving the starting button 52 to the right, contacts S0, 64, 74 are closed. Closing of contact 50 causes opening of the valve 20 as contact 54 is closed. Closing of contact 64 causes energization of solenoid valve 12 as contact 66 is also closed. When the solenoid valve 12 lis energized fresh water is admitted to the dishwasher. Closing of the contact 74 causes power supply to the heating element 16 as contact 76 is also closed. Under these conditions fresh water is admitted into the dishwasher in the way described above. The heating element 16 supplied with electric power heats the water entering into the dishwasher. As soon as a predetermined level in the water chamber 4 is obtained, floating body 124 is raised so as to close contact ⁇ 120. When contact 120 is closed, the motor 114 starts and drives the cam shaft 58 via the reduction gear box '1.16.
  • cam 56 yopens contact 54, so that no further water flow takes place through valve 20 and pipe 17.
  • contact 66 is opened by cam 68, so as to deener-gize solenoid valve 12 and to stop ywater ow through this valve.
  • Cam 86 is so adjusted -as to ⁇ close contact 84 before simultaneously with ⁇ or after opening of contact 66.
  • contact 84 is closed, the circulating pump begins to circulate washing water in the dish washer continuously, las already described.
  • cam 78 may continue to keep contact 76 closed, so as to further heat the circulated water by the heating element 16.
  • contact 92 When the dirty wash water has been removed from the dishwasher, contact 92 is opened again, so that pump 22 stops. At ⁇ the same time contact 102 is closed by cam 104, :so as to supply power to a motor and a heating element (not shown) of the air heating ⁇ and compressor unit 96. After some time when the clean dishes have been dried by the air stream coming from the .air heating and compressor unit 96, contact 102 is opened again so as to interrupt power supply to the air heating and compresser unit.
  • ythere may be a relay, which keeps contact 120 closed, when it has once been closed by floating body 124 and which opens contact 120 again, when the drying action is finished, so as to stop the motor 114.
  • FIG. 4 a control unit for controlling the exhaustion of the water softener is illustrated.
  • Solenoid valve 12 comprises a valve housing 126 land a valve piston 128.
  • the valve pist-on ⁇ 128 is supported by a magnetic core l130 movable within a magnetic coil 132.
  • the magnetic core 130 comprises an extension 134, which co-operates with a lsprocket 136 on an input shaft 138 ofthe counter 30.
  • An output shaft 140 of the counter 30 bears a lever 142 cooperating with a push rod 143.
  • the push rod 143 acts on a contact 112 of the connector 110 (FIG. 4).
  • the relay 106 (FIGS. 3 and 4) comprises two contacts 144, 146. Contact 144 is normally open and contact 146 is normally closed, when the relay 106 is energized by .the normally closed contact 1l12.
  • the output shaft 140 ⁇ of the counter 30 actua-tes contact 1i12 after la predetermined number of counting steps transmitted by input shaft 138.
  • Said predetermined nurnber can be varied -by adjusting counter 30.
  • counter 30 can lbe reset by reset switch 34.
  • a dishwasher comprising (a) a casing; and mounted within said casing:
  • a water circulation pump in said conduit means for supplying water from the wash water chamber to the dish washing space, the pump having an input connected to the -drain outlet means and an output connected to the distributing means;
  • V(i) a second branch
  • the dishwasher of claim l further comprising I(o) a valve in each of said branches for selectively opening and closing said branches.
  • the dishwasher of claim l further comprising (s) an inlet means connected to the other one of said branches for introducing a cleansing medium into the fresh water in said other branch.
  • a dishwasher comprising (a) a casing; and mounted within said casing;
  • a water circulation pump in said conduit means for supplying water from the wash water chamber to the dish washing space, the pump having an input connected to the drain outlet means and an output connected to the distributing means;
  • a dishwasher comprising (a) a casing; and mounted within said casing:
  • a dish container defining a dish washing space and :a wash water chamber below said space;
  • a water circulation pump in said conduit means for supplying water from the wash water chamber to the dish washing space, the pump having an input connected to the drain outlet means and an output c011- nected to the distributing means;
  • a fresh water supply and conduit system connected to the input of the water circulation pump, said system including (h) a first branch,
  • An automatic dishwasher comprising (a) a casing; and mounted within said casing:
  • a water circulation pump in said conduit means for supplying water from the wash water chamber to the dish washing space, the pump having an input connected to the drain outlet means and an output connected to the distributing means;
  • a fresh water supply and conduit system connected to the input of the water circulation pump, said system including (v) a water supply conduit,
  • valve means between said water supply conduit and said first and second branch conduits
  • (r) ⁇ a programming means sequentially opening said valve means to connect the water supply conduit t0 the first branch conduit, closing said valve means in response to the water level in said wash water chamber, operating said water circulation pump, and finally opening said valve means to connect the water supply conduit to the second branch conduit;

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  • Washing And Drying Of Tableware (AREA)
  • Treatment Of Fiber Materials (AREA)
US102170A 1960-04-14 1961-04-11 Dishwasher Expired - Lifetime US3087504A (en)

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DEM0045013 1960-04-14

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AT (1) AT238400B (enrdf_load_html_response)
BE (1) BE602376A (enrdf_load_html_response)
CH (1) CH396335A (enrdf_load_html_response)
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GB (1) GB945821A (enrdf_load_html_response)
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204767A (en) * 1964-02-20 1965-09-07 Borochaner Stuart Automatic washing machines with water-softening means
US3386454A (en) * 1966-03-30 1968-06-04 Gen Electric Dishwasher with integral water softener
US3492159A (en) * 1968-10-18 1970-01-27 Economics Lab Water conditioning
US3517816A (en) * 1967-01-21 1970-06-30 Philips Corp Fluid treatment apparatus
US3544371A (en) * 1968-03-25 1970-12-01 Miele & Cie Device for regenerating an ion exchanger,water softener in a dishwashing or other washing machine
US3595252A (en) * 1967-06-28 1971-07-27 Giovanni Conte Apparatus for controlled washing by de-ionized high-purity, recirculated water, particularly adapted for scientific glassware
US3974843A (en) * 1975-06-23 1976-08-17 Societe Distrembal Sa Washing machine more especially for dental instruments and equipment for making dental prostheses
USD313678S (en) 1986-11-14 1991-01-08 Sharp Corporation Dishwasher
USD456859S1 (en) 2000-11-23 2002-05-07 Golden Bright Manufacturer Ltd. Toy dish washer
US6557382B1 (en) * 1999-09-20 2003-05-06 Hitachi, Ltd. Washing machine
US20050257810A1 (en) * 2001-02-15 2005-11-24 Bigott James W Kitchenware washers and related methods
US20060237047A1 (en) * 2001-02-15 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US20060237046A1 (en) * 2005-04-22 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US20060237045A1 (en) * 2005-04-22 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US20060254619A1 (en) * 2005-04-22 2006-11-16 Bigott James W Commerical kitchenware washers and related methods
US20070034236A1 (en) * 2005-08-15 2007-02-15 Johnsondiversey, Inc. Automatic control system for a kitchen warewasher
US20070068562A1 (en) * 2005-09-27 2007-03-29 General Electric Company Multiple spray arm dishwashing apparatus and method for assembling same
US20070084486A1 (en) * 2005-09-06 2007-04-19 Lg Electronics Inc. Dish washer
US20140305471A1 (en) * 2011-08-19 2014-10-16 Akrion Systems Llc Reduced consumptions stand alone rinse tool having self-contained closed-loop fluid circuit, and method of rinsing substrates using the same
US20150204005A1 (en) * 2012-06-29 2015-07-23 Electrolux Home Products Corporation N.V. Laundry Washing Machine
US9265400B2 (en) 2005-04-22 2016-02-23 Duke Manufacturing Co. Commercial kitchenware washers and related methods

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1450054A (en) * 1921-04-04 1923-03-27 Walter E Titus Water-treating attachment for washing machines, etc.
US1525756A (en) * 1922-10-18 1925-02-10 Albion T Mckenney Dishwashing machine
US1910011A (en) * 1926-07-19 1933-05-23 Permutit Co Automatic, semiautomatic or time controlled water softener
US1963520A (en) * 1931-05-02 1934-06-19 Cinderella Washing Machine Com Washing machine
US2157112A (en) * 1931-09-16 1939-05-09 Douglas E Bonner Machine for cleansing and treating
US2434353A (en) * 1943-09-02 1948-01-13 Westinghouse Electric Corp Washing apparatus having an automatically cycled regenerative water-softening system
US2522242A (en) * 1942-02-28 1950-09-12 Gen Motors Corp Ingredient supply for washing machines
US2633437A (en) * 1951-07-31 1953-03-31 Stoelting Bros Co Method of washing aluminum kitchen utensils
US2651191A (en) * 1949-08-09 1953-09-08 Barnes John Washing machine for agitating clothes and cleansing liquid by the use of air jets submerged in said cleansing liquid
US2843137A (en) * 1956-03-22 1958-07-15 Federighi George Joseph Motor-actuated apparatus for injecting drying agents into a rinse-spray system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1450054A (en) * 1921-04-04 1923-03-27 Walter E Titus Water-treating attachment for washing machines, etc.
US1525756A (en) * 1922-10-18 1925-02-10 Albion T Mckenney Dishwashing machine
US1910011A (en) * 1926-07-19 1933-05-23 Permutit Co Automatic, semiautomatic or time controlled water softener
US1963520A (en) * 1931-05-02 1934-06-19 Cinderella Washing Machine Com Washing machine
US2157112A (en) * 1931-09-16 1939-05-09 Douglas E Bonner Machine for cleansing and treating
US2522242A (en) * 1942-02-28 1950-09-12 Gen Motors Corp Ingredient supply for washing machines
US2434353A (en) * 1943-09-02 1948-01-13 Westinghouse Electric Corp Washing apparatus having an automatically cycled regenerative water-softening system
US2651191A (en) * 1949-08-09 1953-09-08 Barnes John Washing machine for agitating clothes and cleansing liquid by the use of air jets submerged in said cleansing liquid
US2633437A (en) * 1951-07-31 1953-03-31 Stoelting Bros Co Method of washing aluminum kitchen utensils
US2843137A (en) * 1956-03-22 1958-07-15 Federighi George Joseph Motor-actuated apparatus for injecting drying agents into a rinse-spray system

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204767A (en) * 1964-02-20 1965-09-07 Borochaner Stuart Automatic washing machines with water-softening means
US3386454A (en) * 1966-03-30 1968-06-04 Gen Electric Dishwasher with integral water softener
US3517816A (en) * 1967-01-21 1970-06-30 Philips Corp Fluid treatment apparatus
US3595252A (en) * 1967-06-28 1971-07-27 Giovanni Conte Apparatus for controlled washing by de-ionized high-purity, recirculated water, particularly adapted for scientific glassware
US3544371A (en) * 1968-03-25 1970-12-01 Miele & Cie Device for regenerating an ion exchanger,water softener in a dishwashing or other washing machine
US3492159A (en) * 1968-10-18 1970-01-27 Economics Lab Water conditioning
US3974843A (en) * 1975-06-23 1976-08-17 Societe Distrembal Sa Washing machine more especially for dental instruments and equipment for making dental prostheses
USD313678S (en) 1986-11-14 1991-01-08 Sharp Corporation Dishwasher
US6557382B1 (en) * 1999-09-20 2003-05-06 Hitachi, Ltd. Washing machine
USD458316S1 (en) 2000-11-23 2002-06-04 Golden Bright Manufacturer Ltd. Toy washing machine
USD456859S1 (en) 2000-11-23 2002-05-07 Golden Bright Manufacturer Ltd. Toy dish washer
US7578305B2 (en) 2001-02-15 2009-08-25 Steelkor, L.L.C. Kitchenware washers and related methods
US20050257810A1 (en) * 2001-02-15 2005-11-24 Bigott James W Kitchenware washers and related methods
US20060237047A1 (en) * 2001-02-15 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US7527062B2 (en) 2001-02-15 2009-05-05 Steelkor, L.L.C. Kitchenware washers and methods of manufacturing the same
US20060254619A1 (en) * 2005-04-22 2006-11-16 Bigott James W Commerical kitchenware washers and related methods
US20060237045A1 (en) * 2005-04-22 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US9265400B2 (en) 2005-04-22 2016-02-23 Duke Manufacturing Co. Commercial kitchenware washers and related methods
US20100282281A1 (en) * 2005-04-22 2010-11-11 Steelkor, L.L.C. Kitchenware washers and methods of manufacturing the same
US7763119B2 (en) * 2005-04-22 2010-07-27 Steelkor, L.L.C. Kitchenware washers and methods of manufacturing the same
US7475698B2 (en) 2005-04-22 2009-01-13 Steelkor, L.L.C. Kitchenware washers and methods of manufacturing the same
US20060237046A1 (en) * 2005-04-22 2006-10-26 Bigott James W Kitchenware washers and methods of manufacturing the same
US20070034236A1 (en) * 2005-08-15 2007-02-15 Johnsondiversey, Inc. Automatic control system for a kitchen warewasher
US7691209B2 (en) 2005-08-15 2010-04-06 Johnsondiversey, Inc. Automatic control system for a kitchen warewasher
WO2007021562A3 (en) * 2005-08-15 2007-06-14 Johnson Diversey Inc Automatic control system for a kitchen warewasher
CN101272724B (zh) * 2005-08-15 2011-08-17 迪瓦西公司 炊具器皿洗涤机的自动控制系统
US20070084486A1 (en) * 2005-09-06 2007-04-19 Lg Electronics Inc. Dish washer
US7931033B2 (en) * 2005-09-06 2011-04-26 Lg Electronics Inc. Dish washer
US7681582B2 (en) * 2005-09-27 2010-03-23 General Electric Company Multiple spray arm dishwashing apparatus and method for assembling same
US20070068562A1 (en) * 2005-09-27 2007-03-29 General Electric Company Multiple spray arm dishwashing apparatus and method for assembling same
US20140305471A1 (en) * 2011-08-19 2014-10-16 Akrion Systems Llc Reduced consumptions stand alone rinse tool having self-contained closed-loop fluid circuit, and method of rinsing substrates using the same
US20150204005A1 (en) * 2012-06-29 2015-07-23 Electrolux Home Products Corporation N.V. Laundry Washing Machine
US9422660B2 (en) * 2012-06-29 2016-08-23 Electrolux Home Products Corporation N.V. Laundry washing machine

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DE1403664A1 (de) 1968-12-12
BE602376A (fr) 1961-07-31
DE1403664B2 (de) 1971-09-09
CH396335A (de) 1965-07-31
AT238400B (de) 1965-02-10
LU39984A1 (enrdf_load_html_response) 1961-06-07
GB945821A (en) 1964-01-08
FR1285663A (fr) 1962-02-23

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