US3807420A - Dishwasher drying system - Google Patents

Dishwasher drying system Download PDF

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Publication number
US3807420A
US3807420A US00253387A US25338772A US3807420A US 3807420 A US3807420 A US 3807420A US 00253387 A US00253387 A US 00253387A US 25338772 A US25338772 A US 25338772A US 3807420 A US3807420 A US 3807420A
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US
United States
Prior art keywords
air
tub
blower
dishwasher
water
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.)
Expired - Lifetime
Application number
US00253387A
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English (en)
Inventor
E Donselman
Cloy G Mc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US00253387A priority Critical patent/US3807420A/en
Priority to ZA732766A priority patent/ZA732766B/xx
Priority to CA170,340A priority patent/CA1011222A/en
Priority to AU55239/73A priority patent/AU471939B2/en
Priority to ES414718A priority patent/ES414718A1/es
Priority to JP48052662A priority patent/JPS4955168A/ja
Application granted granted Critical
Publication of US3807420A publication Critical patent/US3807420A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L15/48—Drying arrangements
    • A47L15/486—Blower arrangements

Definitions

  • FIG. 1 DISHWASHER DRYING SYSTEM BACKGROUND OF THE INVENTION 1.
  • FIG. 1 the undercounter domestic dishwasher il- The invention pertains to the art of drying systems for lustrated is shown in a typical location installed below domestic dishwashers.
  • the arrangement includes a tub with heating means in the lower portion energized at least during the drying operation, means defining an air inlet through the tub adjacent the lower edge of the tub door, means in the upper portion of one of the vertical walls of the tub defining an air outlet from the tub, with the outlet means including means for trapping water to substantially block the outlet from the tub during washing and rinse operations and for releasing the water block during a drying operation, an electric motor driven blower having a suction and pressure side means for channeling air in heat exchange relation past the motor to the suction side of the blower, duct means connecting the air outlet for the tub to the suction side of the blower, and discharge duct means leading from the pressure side of the blower to the room space at the lower front of the dishwasher.
  • the blower draws both moist air from the tub and heated air from the motor and discharges the comingled air through the discharge duct means.
  • the arrangement according to the invention also contemplates that the water inlet opening to the tub be located in the upper portion of the tub so that following the drying operation, ventilating air can enter the tub through the air inlet and leave by way of at least the opening through which water is admitted to the tub.
  • FIG.- 1 is a partly schematic side elevational view of an undercounter dishwasher provided with a drying system according to the invention
  • FIG. 2 is an isometric view of the motor-blowerpump assembly for the dishwasher
  • FIG. 3 is a partly broken view of the interior of the blower.
  • FIG. 4 is a vertical section corresponding to one taken along the line lV-IV of FIG. 1 and illustrating the air outlet arrangement for the tub including the water trap.
  • the tub is conventional in the sense of including opposite side and rear walls 12 and 14, respectively, a bottom sump 16 and an open front face 18 adapted to be closed by a door 20 hinged adja- 0 cent its lower edge, as is conventional.
  • the sump contains an electric resistance heater 22 adapted to be energized at least during a dish drying operation.
  • the dishwasher includes the usual conventional components such as controls including a timer which controls a cycle including wash, rinse and dry operations, dish racks, water drain arrangement, and the water inlet control arrangement, for example. As such are not a part of the invention, they are not shown. However, the location of the water inlet 23 in the upper portion of the tub on the wall opposite that wall facing the viewer in FIG. 1 is shown. In accordance with conventional practice, the water inlet opening 23 to the tub is in communication with atmosphere through the conventional air gap provided in the water inlet arrangement for the dishwasher.
  • the motor 28 drives both the air blower 30 and the water pump 32 arranged in successive series relation at the one end of the motor.
  • the water return inlet for the pump is designated 34 while the pump recirculation outlet is designated 36.
  • the water drawn into inlet 34 is drawn into the inlet 34 and forced up through the outlet 36 into water distributing means (not shown) located within the tub.
  • the water drawn into inlet 34 is pumped out a drain outlet (not shown).
  • the blower 30 includes a casing 46 of generally scroll shape in outline including an opposite end wall 48, only part of which is seen through the arc-shaped opening 50 provided in a partition 52 which is spaced from and generally parallel to the end wall 48.
  • This arrangement is provided so that air may be drawn into the eye of the impeller 44 both through the usual location, which is the opening 42 aligned with the axis of the blower, and from a peripheral location on the scroll.
  • a hollow connection 54 through which air is received from the tub, as will be explained later. The air which is admitted through the connection 54 flows as indicated by the arrows in FIG.
  • the suction side of the blower is connected to the tub air outlet generally designated 62 by a hose or duct 64 which extends from the air outlet to the blower connection 54.
  • An opening 66 is provided in the upper portion of the side wall 12 of the tub.
  • a fitting 68 is secured to the inside face of the wall 12 to prevent water from being thrown directly through the opening 66 by the water distributing means in the tub.
  • the fitting includes a lower water trap portion 70 which holds water thrown at the side wall by the water distributing means during wash and rinse operations.
  • the trap includes a leak hole 72 in its bottom through which the water 74 accumulated in the trap drains continuously during the wash and rinse operations. However, the hole 72 is sized so that the trap maintains a water level, as shown, by the continual addition of water flung about by the water distributing means.
  • a connecting fitting 76 is provided to which the duct 64 is connected.
  • a pressure relief hole 78 in the exterior connector so that the suction pressure induced by the blower is not sufficient that the water 74 bubbles and the air seal provided thereby is lost.
  • the size of the pressure relief opening 78 is dependent upon the suction pressure developed by the blower in the air outlet plenum, relative to the head of water in the trap 70. So long as the machine cycle is in a washing or rinsing operation during which water is being flung about, the trap will prevent air from leaving the tub. This is of course desirable since loss of air would also result in loss of heat from the tub and the water therein.
  • the water in the trap drainsthrough the hole 72 and then air can exit through the outlet means in the path indicated by the dash line arrows in FIG. 4.
  • the heater 22 is energized to facilitate the drying. Accordingly, the tub contains moist hot air during the drying operation. Air is admitted into the tubthrough an air inlet 80 (FIG. 1) formed in the lower portion of the door 20 and provided with suitable baffles to prevent the passage of water outwardly therethrough during a washing and rinsing operation.
  • the air outlet means 62 is located in the upper portion of the tub (i.e., above the middle of the tub with respect to its height).
  • This discharge duct is preferably of a material which absorbs vibration, such a a soft plastic foam, which also gives it the property of some sound absorption.
  • This duct leads to the lower front of the dishwasher where an elbow 84 directs it downwardly through an opening in the horizontal wall of the toe panel 86.
  • this comingled heated moist air from the tub, and the heated air from the motor is carried out from underneath the tub and discharged into the room air space at the lower front of the dishwasher.
  • the significance of the location of the water inlet opening 23 in the upper portion of the tub wall relates to obtaining a ventilating air flow through the tub after the drying operation is terminated.
  • the air inside the, tub at the end of a drying operation is still somewhat moist. Since at the end of a drying operation the walls of the tub cool down faster than the dishes and utensils in the tub, moisture will condense first upon these walls to the degree that it is present. This can give an impression that an inadequate drying job has not been done on the dishes.
  • the ventilation through the inlet and out the water inlet 23 at this time the relative humidity of the air in the tub is reduced more quickly.
  • the rate at which warm moist air is drawn from the upper portion of the tub by the blower, relative to the rate at which dry air is drawn in heat exchange relation past the motor, when a heating element 22 of typical wattage rating is used, is relatively small.
  • a heating element of approximately 700 to 750 watts, in a tub of ordinary size it is believed that drawing air at a rate falling at a range of about 2 to 7 CF M provides satisfactory operation.
  • the rate at which cooling air is drawn past the motor of course depends upon the character of the motor itself, but this rate in one commercial device which we envisage employing the invention may be in the order of, say, 50 CFM.
  • a drying system therefor including:
  • water trap means for blocking the withdrawal of air from the upper portion of said tub during washing and rinsing operations.
  • a tub including opposite and rear side walls and having an open front face
  • a heating element in the lower portion of said tub energized at least during said drying operation
  • said air outlet means includes means for trapping water to substantially block said outlet from said tub during wash and rinse operations, and for releasing said water to unblock said air outlet during a drying operation;
  • a-blower having a suction and a pressure side
  • discharge duct means having an inlet end connected to said pressure side of said blower, and an outlet end in communication with the room space in front of said dishwasher so that the air discharged from said blower is directed into the room in front of said dishwasher;
  • blower operating during said dry operation to draw both moist warm air from said tub and heated air from said motor and discharging all of said comingled air through said discharge duct outlet.
  • said water trapping means includes a reservoir in which water is accumulated during washing and rinsing operations, said reservoir including a leak port therein to permit said water to drain therefrom at the conclusion of said operations.
  • said air outlet means includes a pressure relief opening on the downstream side of said reservoir, relative to the direction of air flow through said air outlet means.
  • said dishwasher includes a water inlet opening, placing the interior of the tub in communication with the exterior, in the upper portion of one of said side walls of said tub.

Landscapes

  • Washing And Drying Of Tableware (AREA)
US00253387A 1972-05-15 1972-05-15 Dishwasher drying system Expired - Lifetime US3807420A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00253387A US3807420A (en) 1972-05-15 1972-05-15 Dishwasher drying system
ZA732766A ZA732766B (en) 1972-05-15 1973-04-24 An improvement in or relating to dishwasher drying system
CA170,340A CA1011222A (en) 1972-05-15 1973-05-03 Dishwasher drying system
AU55239/73A AU471939B2 (en) 1972-05-15 1973-05-04 Improvements in or relating to dishwasher drying system
ES414718A ES414718A1 (es) 1972-05-15 1973-05-12 Perfeccionamientos introducidos en un sistema de secado pa-ra lavaplatos.
JP48052662A JPS4955168A (enrdf_load_html_response) 1972-05-15 1973-05-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00253387A US3807420A (en) 1972-05-15 1972-05-15 Dishwasher drying system

Publications (1)

Publication Number Publication Date
US3807420A true US3807420A (en) 1974-04-30

Family

ID=22960060

Family Applications (1)

Application Number Title Priority Date Filing Date
US00253387A Expired - Lifetime US3807420A (en) 1972-05-15 1972-05-15 Dishwasher drying system

Country Status (6)

Country Link
US (1) US3807420A (enrdf_load_html_response)
JP (1) JPS4955168A (enrdf_load_html_response)
AU (1) AU471939B2 (enrdf_load_html_response)
CA (1) CA1011222A (enrdf_load_html_response)
ES (1) ES414718A1 (enrdf_load_html_response)
ZA (1) ZA732766B (enrdf_load_html_response)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184500A (en) * 1978-07-31 1980-01-22 General Electric Company Dishwasher vent closing arrangement
US5165431A (en) * 1990-12-28 1992-11-24 Whirlpool Corporation Air flow control for a dishwasher
US5187954A (en) * 1990-11-15 1993-02-23 Samsung Electronics Co., Ltd. Cooling device for washing machine transmission
US5273061A (en) * 1991-11-26 1993-12-28 Zanussi Elettrodomestici S.P.A. Dishwasher with drying by condensation
US5287868A (en) * 1993-02-19 1994-02-22 Maytag Corporation Dishwasher convection air inlet and suds control device
US5875802A (en) * 1996-04-10 1999-03-02 Electrolux Zanussi Elettrodomestici S.P.A. Washload drying arrangement of dishwashing machines
US6006553A (en) * 1997-02-18 1999-12-28 Samsung Electronics Co., Ltd. Heat dissipating blades for a motor of a washing machine
EP1127531A3 (en) * 2000-02-24 2002-07-03 Electrolux Zanussi S.p.A. Dishwashing machine with air cooling system
EP1172060A3 (en) * 2000-07-03 2002-07-24 Electrolux Zanussi S.p.A. Dishwashing machine with air cooling system
US20060151010A1 (en) * 2005-01-12 2006-07-13 Lg Electronics Inc. Drive unit for dish washing machines
US20060231122A1 (en) * 2005-04-18 2006-10-19 Ark-Les Corporation Dishwasher with counter-convection air flow
DE102005023428A1 (de) * 2005-05-20 2006-11-23 Premark Feg L.L.C. (N.D.Ges.D. Staates Delaware), Wilmington Gewerbliche Geschirrspülmaschine
US20080115811A1 (en) * 2006-11-17 2008-05-22 Electrolux Home Products, Inc. Dishwasher apparatus including a fan for a drying cycle
DE102007008826A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine und Verfahren zu ihrem Betrieb
DE102007008827A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine
US20080264455A1 (en) * 2007-04-25 2008-10-30 Mark Edward Brewer Humidity reducing exhaust duct for dishwasher
US20160022116A1 (en) * 2014-07-23 2016-01-28 Whirlpool Corporation Dishwasher
DE102015211197A1 (de) * 2015-06-18 2016-12-22 BSH Hausgeräte GmbH Geschirrspülmaschine mit einer Sorptionstrocknungseinrichtung
US10295256B2 (en) 2009-02-04 2019-05-21 Electrolux Home Products, Inc. Dishwasher, a door assembly for the dishwasher, and an associated method for drying dishware
EP3511025A1 (de) * 2018-01-11 2019-07-17 MELAG Medizintechnik oHG Reinigungs- und desinfektionsgerät sowie verfahren zum trocknen medizinischer und/oder zahnmedizinischer instrumente
US10533755B2 (en) 2017-11-15 2020-01-14 Bsh Home Appliances Corporation Hidden ventilation toe kick
US10980391B2 (en) 2017-04-28 2021-04-20 Owens Corning Intellectual Capital, Llc Appliance with acoustically insulated ductwork
US20210267433A1 (en) * 2018-09-20 2021-09-02 Electrolux Appliances Aktiebolag Dishwasher goods drying system
US20230292985A1 (en) * 2020-09-30 2023-09-21 BSH Hausgeräte GmbH Dishwasher with at least one air outlet

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800008A (en) * 1955-10-06 1957-07-23 Gen Electric Venting arrangement for clothes dryers and combination washerdryers
US2824567A (en) * 1951-11-24 1958-02-25 Elektroiux Ab Dishwashing machine
US2909184A (en) * 1957-08-28 1959-10-20 Gen Electric Dishwashing machine
US3068877A (en) * 1958-09-12 1962-12-18 Gen Motors Corp Dishwasher
US3103227A (en) * 1961-04-18 1963-09-10 Westinghouse Electric Corp Dishwasher apparatus
US3126898A (en) * 1964-03-31 Dishwasher ventilating system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126898A (en) * 1964-03-31 Dishwasher ventilating system
US2824567A (en) * 1951-11-24 1958-02-25 Elektroiux Ab Dishwashing machine
US2800008A (en) * 1955-10-06 1957-07-23 Gen Electric Venting arrangement for clothes dryers and combination washerdryers
US2909184A (en) * 1957-08-28 1959-10-20 Gen Electric Dishwashing machine
US3068877A (en) * 1958-09-12 1962-12-18 Gen Motors Corp Dishwasher
US3103227A (en) * 1961-04-18 1963-09-10 Westinghouse Electric Corp Dishwasher apparatus

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184500A (en) * 1978-07-31 1980-01-22 General Electric Company Dishwasher vent closing arrangement
US5187954A (en) * 1990-11-15 1993-02-23 Samsung Electronics Co., Ltd. Cooling device for washing machine transmission
US5165431A (en) * 1990-12-28 1992-11-24 Whirlpool Corporation Air flow control for a dishwasher
US5273061A (en) * 1991-11-26 1993-12-28 Zanussi Elettrodomestici S.P.A. Dishwasher with drying by condensation
US5287868A (en) * 1993-02-19 1994-02-22 Maytag Corporation Dishwasher convection air inlet and suds control device
US5875802A (en) * 1996-04-10 1999-03-02 Electrolux Zanussi Elettrodomestici S.P.A. Washload drying arrangement of dishwashing machines
US6006553A (en) * 1997-02-18 1999-12-28 Samsung Electronics Co., Ltd. Heat dissipating blades for a motor of a washing machine
EP1127531A3 (en) * 2000-02-24 2002-07-03 Electrolux Zanussi S.p.A. Dishwashing machine with air cooling system
EP1172060A3 (en) * 2000-07-03 2002-07-24 Electrolux Zanussi S.p.A. Dishwashing machine with air cooling system
US20060151010A1 (en) * 2005-01-12 2006-07-13 Lg Electronics Inc. Drive unit for dish washing machines
US7581552B2 (en) * 2005-01-12 2009-09-01 Lg Electronics Inc. Drive unit for dish washing machines
US20060231122A1 (en) * 2005-04-18 2006-10-19 Ark-Les Corporation Dishwasher with counter-convection air flow
US7887643B2 (en) * 2005-04-18 2011-02-15 Illinois Tool Works, Inc. Dishwasher with counter-convection air flow
DE102005023428A1 (de) * 2005-05-20 2006-11-23 Premark Feg L.L.C. (N.D.Ges.D. Staates Delaware), Wilmington Gewerbliche Geschirrspülmaschine
US7901518B2 (en) * 2005-05-20 2011-03-08 Premark Feg L.L.C. Commercial dishwasher with air deflector arrangement
US20080264458A1 (en) * 2005-05-20 2008-10-30 Premark Feg L.L.C. Commercial Dishwasher
US20080115811A1 (en) * 2006-11-17 2008-05-22 Electrolux Home Products, Inc. Dishwasher apparatus including a fan for a drying cycle
US20080202566A1 (en) * 2007-02-22 2008-08-28 Premark Feg L.L.C. Industrial dishwasher
DE102007008827A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine
US7875122B2 (en) 2007-02-22 2011-01-25 Premark Feg L.L.C. Industrial dishwasher and method of operating the same
US20080202557A1 (en) * 2007-02-22 2008-08-28 Premark Feg L.L.C. Industrial Dishwasher and Method of Operating the Same
DE102007008826A1 (de) 2007-02-22 2008-08-28 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine und Verfahren zu ihrem Betrieb
US20080264455A1 (en) * 2007-04-25 2008-10-30 Mark Edward Brewer Humidity reducing exhaust duct for dishwasher
US7909939B2 (en) 2007-04-25 2011-03-22 Illinois Tool Works, Inc. Humidity reducing exhaust duct for dishwasher
US10295256B2 (en) 2009-02-04 2019-05-21 Electrolux Home Products, Inc. Dishwasher, a door assembly for the dishwasher, and an associated method for drying dishware
US10136793B2 (en) * 2014-07-23 2018-11-27 Whirlpool Corporation Dishwasher
US20160022116A1 (en) * 2014-07-23 2016-01-28 Whirlpool Corporation Dishwasher
US11259684B2 (en) 2014-07-23 2022-03-01 Whirlpool Corporation Dishwasher
DE102015211197A1 (de) * 2015-06-18 2016-12-22 BSH Hausgeräte GmbH Geschirrspülmaschine mit einer Sorptionstrocknungseinrichtung
US10980391B2 (en) 2017-04-28 2021-04-20 Owens Corning Intellectual Capital, Llc Appliance with acoustically insulated ductwork
US10533755B2 (en) 2017-11-15 2020-01-14 Bsh Home Appliances Corporation Hidden ventilation toe kick
EP3511025A1 (de) * 2018-01-11 2019-07-17 MELAG Medizintechnik oHG Reinigungs- und desinfektionsgerät sowie verfahren zum trocknen medizinischer und/oder zahnmedizinischer instrumente
US20210267433A1 (en) * 2018-09-20 2021-09-02 Electrolux Appliances Aktiebolag Dishwasher goods drying system
US12318054B2 (en) * 2018-09-20 2025-06-03 Electrolux Appliances Aktiebolag Dishwasher goods drying system
US20230292985A1 (en) * 2020-09-30 2023-09-21 BSH Hausgeräte GmbH Dishwasher with at least one air outlet

Also Published As

Publication number Publication date
ES414718A1 (es) 1976-11-16
JPS4955168A (enrdf_load_html_response) 1974-05-29
CA1011222A (en) 1977-05-31
AU5523973A (en) 1974-11-07
ZA732766B (en) 1974-04-24
AU471939B2 (en) 1976-05-06

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