EP2241242A2 - Geschirrspüler - Google Patents

Geschirrspüler Download PDF

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Publication number
EP2241242A2
EP2241242A2 EP10003952A EP10003952A EP2241242A2 EP 2241242 A2 EP2241242 A2 EP 2241242A2 EP 10003952 A EP10003952 A EP 10003952A EP 10003952 A EP10003952 A EP 10003952A EP 2241242 A2 EP2241242 A2 EP 2241242A2
Authority
EP
European Patent Office
Prior art keywords
water
tub
dish washer
humid air
water jacket
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Withdrawn
Application number
EP10003952A
Other languages
English (en)
French (fr)
Inventor
Jung Youp Han
Young Hwan Park
Min Kyung Jung
Je Hoon Kim
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP2241242A2 publication Critical patent/EP2241242A2/de
Withdrawn legal-status Critical Current

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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
    • A47L15/48—Drying arrangements
    • A47L15/483—Drying arrangements by using condensers

Definitions

  • the present invention relates generally to a dish washer, and more particularly, to a dishwasher including a water jacket.
  • a dish washer sprays high pressure washing water to dishes by using spray nozzles for washing the dishes.
  • the dish washer has a holding space in a tub for washing the dishes, which, in turn, includes a plurality of dish racks for holding the dishes.
  • the washing water is held in a sump assembly and supplied to the spray nozzles therefrom to be sprayed through the spray nozzles.
  • the washing water used for the dish washing is then collected at the sump assembly and may be used again.
  • Air used for drying the dishes contains moisture and is generally at a high temperature. Once washing and drying of the dishes is finished, such high temperature, humid air is discharged partially, or re-circulated to the tub. However, when the user opens a door on the dish washer, the high temperature, humid air can cause inconvenience to the user if the air rushes out at one time. Therefore, in order to prevent accidents caused by the user opening the door to soon, the high temperature, humid air is cooled down to a certain extent after drying the dishes.
  • the partial discharge of the high temperature, humid air to an outside of the dish washer or re-circulation of the high temperature, humid air to the tub causes condensing of vapor to form water drops in the vicinity of a portion through which the air is being discharged to the outside of the dish washer, or an inside of the tub, respectively. If the water drops are discharged to the outside of the dish washer, or the water drops formed in the tub fall down on the dishes, the user can be inconvenienced.
  • an object of the present invention is to provide a dish washer which can dehumidify humid air formed after drying dishes and discharge dehumidified water effectively for reducing an amount of water condensed in the tub.
  • a dish washer includes, a cabinet defining an exterior of the dish washer, a tub in the cabinet to provide a washing chamber for washing dishes, a water jacket mounted to a sidewall of the tub to hold water supplied to condense moisture from humid air formed after washing and drying of the dishes when the humid air is brought into contact thereto, and a condensing duct mounted to the water jacket for guiding the humid air to the water jacket in removing the moisture from the humid air.
  • the dish washer may include a water supply unit to supply water to the water jacket from the exterior of the dish washer.
  • the condensing duct may be mounted to an outside of the water jacket such that the water jacket is located between the condensing duct and the washing chamber.
  • the dish washer may include a condensed water tank located under the water jacket to hold condensed water fallen from the condensing duct.
  • the condensing duct may have one end in communication with the tub, and the other end connected to the condensed water tank.
  • the condensing duct may be smaller than the water jacket, and the condensing duct may be located in the water jacket.
  • the condensing duct may include a plurality of nozzles configured to spray water to an inside of the condensing duct.
  • the condensing duct may further include a plurality of fins projected from an inside of the condensing duct.
  • the plurality of fins may be configured such that fins are alternately arranged or the plurality of fins may be configured such that adjacent fins have generally the same curved shape.
  • the dish washer may include a water softener mounted under the tub for treating the water supplied thereto.
  • the treated water may be supplied to the water jacket through the water softener.
  • a dish washer includes a cabinet defining an exterior of the dish washer, a tub in the cabinet to provide a washing chamber for washing dishes, a water jacket mounted to a first sidewall of the tub to hold water supplied to condense moisture from humid air formed after washing and drying of the dishes when the humid air is brought into contact thereto, and a circulating duct module mounted to a second sidewall of the tub opposite the first sidewall, the circulating duct module being configured to receive humid air from the tub and spray the humid air toward the first sidewall of the tub having the water jacket mounted thereto.
  • the circulating duct module may include a circulating duct configured to receive humid air from the tub, a fan assembly having a fan and a motor for introducing the humid air to the circulating duct, a heater for heating the humid air, and a spray nozzle for spraying the heated humid air into the tub.
  • the circulating duct may be in communication with the tub.
  • the spray nozzle may radially spray the heated humid air heated toward the first sidewall of the tub.
  • FIG. 1 illustrates a section of a dish washer in accordance with the exemplary embodiments of the present invention
  • FIG. 2 illustrates a perspective view of a dish washer in accordance with a first exemplary embodiment of the present invention
  • FIG. 3 illustrates a perspective view of an inside of the dish washer of Fig. 2 ;
  • FIG. 4 illustrates a perspective view of a dish washer in accordance with a second exemplary embodiment of the present invention
  • FIG. 5 illustrates an exploded perspective view of the condensing duct shown in FIG. 4 ;
  • FIG. 6 illustrates an exploded perspective view of a part of a tub of the dish washer shown in FIG. 5 ;
  • FIG. 7 illustrates a perspective view of the condensing duct shown in FIG. 4 ;
  • FIG. 8 illustrates a front view of the water jacket shown in FIG. 4 ;
  • FIG. 9 illustrates a schematic diagram of a dish washer in accordance with a third exemplary embodiment of the present invention.
  • FIG. 10 illustrates a plan view of a water supply flow passage of the dish washer shown in FIG. 9 ;
  • FIG. 11 illustrates a modification of the condensing ducts in accordance with the exemplary embodiments of the present invention.
  • FIG. 12 illustrates a modification of the condensing ducts in accordance with the exemplary embodiments of the present invention.
  • the dish washer includes a cabinet 10 which is an exterior of the dish washer, a tub 100 which forms a washing chamber 100a for washing dishes, a door 101 for opening/closing the tub 100, and a machinery room 100b for mounting electric components, such as a sump assembly 130 for supplying and recovering washing water, and the like.
  • the washing chamber 100a is formed in the tub 100 for holding the dishes, and the washing chamber 100a has a plurality of racks 110 mounted thereto for placing the dishes thereon.
  • the washing water is sprayed through the spray arm assembly 120 in a state the dishes are placed on the rack 110 for washing the dishes.
  • the spray arm assembly 120 includes an upper arm 122 arranged under an upper rack 112, and a lower arm 124 arranged under a lower rack 114.
  • Each of the upper arm 122 and the lower arm 124 is rotatably mounted and has a plurality of spray nozzles (not shown) for spraying washing water toward the dishes.
  • the sump assembly 130 is connected to the upper arm 122 and the lower arm 124 with a connection pipe 200.
  • the sump assembly 130 receives the washing water from a water supply source through a water supply pipe 300, holds the washing water received thus therein, and supplies the washing water to the upper arm 122 and the lower arm 124 through the connection pipe 200 selectively, or at the same time.
  • the washing water used in the washing is drained to an outside of the dish washer through a drain pipe 400.
  • the sump assembly 130 includes a sump 132 for holding the washing water, a water supply pump (not shown) for pumping up the washing water from the sump 132, a discharge pump assembly 136 for discharging the washing water to an outside of the dish washer; a filter chamber 134 having a drain filter mounted thereto, and a fan assembly 138 for driving the discharge pump assembly 136.
  • each of the exemplary embodiments includes a condensing duct 500 or circulating duct module 500A, a water jacket 600, and a water softener module 700.
  • the air becomes high temperature wet vapor or humid air.
  • the terms high temperature wet vapor and humid air will be used interchangeably.
  • a water softener 700 is mounted to the dish washer for treating the hard water to provide soft water. While the related art dish washer may use a water jacket filled with cold water for dehumidifying the air being discharged to an outside of the dish water, the cold water held in the water jacket cools down one sidewall surface of the tub for condensing moisture in the humid air in the tub and making water condensed thus to flow down to a bottom of the tub.
  • a condensing duct 500 or circulating duct module 500A is provided to cooperate with the water jacket 600 and/or the water softener module 700. Structures for dehumidifying wet vapor in accordance with the exemplary embodiments of the present invention will be described in detail below.
  • FIGS. 2 and 3 A configuration of the dish washer for dehumidifying wet vapor in accordance with a first exemplary embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3 .
  • a water jacket 600 filled with cold water is mounted to one side of a tub 100.
  • a condensing duct 500 placed therein for removing moisture from the wet vapor.
  • a condensed water tank 550 is mounted under an outside of the water jacket 600 for holding the condensed water from the condensing duct 500.
  • the condensing duct 500 has one side in communication with the tub 100 and the other side in communication with the condensed water tank 550, for leading the condensed water from the condensing duct 500 to the condensed water tank 550.
  • a water supply unit 610 on one side of lower side of the water jacket 600 connected to a water supply flow passage which is connected to an external water supply source, for supplying the washing water to the water jacket 600.
  • a sump connection portion 620 on the other side of the lower side of the water jacket 600 where the water supply unit is positioned for supplying the water from the water jacket 600 to the sump.
  • a condensed water drain portion 552 under the condensed water tank 550 for supplying the condensed water from the condensed water tank 550 to the sump. The water collected at the sump supply pipe 570 by means of the sump connection portion 620 and the condensed water drain portion 552 is supplied to the sump.
  • the condensing duct 500 leads the humid air formed after washing and drying of the dishes to the water jacket 600 holding the cold water (washing water), for dehumidifying the humid air by heat exchange to condense moisture in the humid air.
  • the condensing duct 500 since the condensing duct 500 is in communication with the tub 100 at one side thereof, the humid air is introduced to the condensing duct 500 from the tub 100 (the air introduction may be made with an additional fan provided or a fan provided already). Because the condensing duct 500 is in the water jacket 600, a surface where the condensing duct 500 is in contact with the cold water in the water jacket 600 is colder than the air in the tub. Therefore, the humid air introduced to the condensing duct 500 moves along the condensing duct 500 while heat exchanging with the surface to have the moisture therein condensed to remove the moisture from the humid air, making the humid air drier than the air in the tub 100. It is preferable that the condensing duct 500 has extensions of an appropriate combination of meandering and stream lines to make a long flow passage in the water jacket 600 to assist in the removal of the moisture to a certain level.
  • the condensed water falls down from the condensing duct 500, along with the extra washing water supplied to the water jacket 600, and is collected at the sump supply pipe 570 through the condensed water drain portion 552 and the sump connection portion 620.
  • the collected water is then returned to the sump 132.
  • the dehumidified air may be introduced to a heater (not shown) via a supplementary duct 150 connected to an upper side (see FIG. 3 ) of the condensing duct 500, heated by the heater, and introduced to the tub again or discharged to an outside of the tub 100.
  • a water jacket 600A is mounted to one sidewall of a tub 100A and a circulating duct module is mounted to an opposite sidewall of the tub 100A.
  • the water jacket 600A filled with cold water therein cools down the one sidewall of the tub 100A. Accordingly, when the humid air in the tub 100A is brought into contact thereto, moisture in the humid air is condensed by heat exchange and flows down to a bottom of the tub 100A.
  • the circulating duct module include a circulating duct 500A having one end in communication with the tub 100A, and the other end coupled to a fan assembly 570A.
  • the fan assembly 570A has a fan (not shown) mounted thereto for circulating air from the tub 100A to the circulating duct 500A. Then, the air is introduced to and heated at a heater 574. The air heated thus is lead to the tub 100A through a nozzle 572 in the tub 100A, again.
  • the heated air is radially sprayed toward the water jacket 600A through the nozzle 572. Because the humid air in the tub 100A is heated and sprayed, a temperature difference of the humid air with the water jacket 600A becomes greater. According to this, moisture is condensed at a wall surface of the tub 100A having the water jacket 600A mounted thereto, enabling to remove the moisture from the humid air.
  • a fine flow passage portion 640A having a plurality of fine flow passages is provided on one side of the water jacket 600A.
  • the washing water is introduced to the fine flow passage portion 640A from the water supply unit 610A and held in the water jacket 600A.
  • the fine flow passage portion 640A has an air brake 650A mounted thereto for moving upward from a mounted position at the time of draining to prevent the washing water from being introduced to the water jacket 600A because of a siphon phenomenon in a state such that the water supplied is stopped.
  • the air brake 650A always serves to maintain the atmospheric pressure at the mounted position except during draining.
  • Excess water supplied to the water jacket 600A is returned to the tub 100A through a communication hole in the tub 100A, lead to the sump 132 through the sump connection portion 620A, or supplied to the water softener (not shown) through the water softener connection portion 630A. This may be selectively controlled by a valve (not shown).
  • a water jacket 600B and a condensing duct 500B having a size similar to the water jacket 600B are mounted to one side of the tub 100B.
  • the condensing duct 500B may be placed in the water jacket 600B or may be attached to an outside of the water jacket 600B.
  • the condensing duct 500B is similar to the condensing duct 500 of the first embodiment except that the contact area between the condensing duct 500B and the water jacket 600B is maximized.
  • the large contact area of the condensing duct 500B to the cold water in the water jacket 600B improves dehumidifying efficiency by heat exchange with the wet vapor. Moreover, the large condensing duct 500B enables the reduction flow resistance of the humid air being introduced thereto.
  • the water is described as being supplied to the water jacket and then proceeding to either the sump or the water softener, it is possible that the water is supplied to the water jacket after the water is lead to the water softener, as shown in FIG. 10 .
  • the water may be desirable to have the water be supplied to the water softener first before supplying the water to the sump. That is, referring to FIG. 10 , it can be made possible that, after the water is supplied to the water softener 700, the water is transferred to the water jacket 600, 600A, 600B, and thereafter, the water is supplied to the sump (or the tub), or a steam generator, or the like by means of valve control.
  • each of the condensing duct 500, circulating duct 500A, and condensing duct 500B can have a variety of shapes as follows.
  • Each of the condensing duct 500, circulating duct 500A, and condensing duct 500B can have a tube of a circular or polygonal cross section, as shown in the exemplary embodiments of FIGS 2-10 , or a plate 500' placed in the water jacket 600 having alternate projections from surfaces of the plate without a separate condensing duct 500(See FIG. 11 ).
  • the condensing duct 500, circulating duct 500A, and condensing duct 500B can have a shape in which a plurality of fins are projected from a plate in the condensing duct (see FIG. 7 ).
  • the moisture can be condensed by heat exchange while the humid air moves therein, there is no limitation to shapes of the condensing duct.
  • one or more spray nozzles 500" can be mounted.
  • a circulation pump (not shown) can be provided for supplying the washing water to the one or more spray nozzles 500".
  • the circulating pump in a machinery room is connected to an underside to the water jacket for pumping up the washing water from the water jacket to the spray nozzle.
  • the one or more spray nozzles 500" can be mounted to the condensing duct for spraying the washing water from the circulating pump to the condensing duct.
  • the humid air passing through the condensing duct has a temperature higher than the washing water being sprayed, when the humid air is in contact with the washing water being sprayed directly, heat exchange takes place. That is, owing to direct contact (direct cooling type) with the washing water, the moisture in the humid air is condensed, the moisture is removed from the humid air.
  • the air having the moisture therein removed by heat exchange with the washing water being sprayed from the spray nozzle as the air is passing through the condensing duct is discharged to the tub 100 or an outside of the cabinet 10, through a circulating discharge duct (not shown) that is provided for this purpose. It is preferable that the circulating discharge duct is mounted to be in communication with an end of the condensing duct, and can be in communication with a discharge duct (not shown) in communication with the tub 100 or an outside of the cabinet 10.
  • a heater may additionally be mounted to the water jacket 600 for heating the air having the moisture removed therefrom by heat exchange for removing the moisture therefrom completely.
  • the heater can be mounted to the end of the condensing duct, or between the condensing duct and the circulating discharge duct, or an inside of the circulating discharge duct and the like, freely.
  • the humid air (wet vapor) formed after washing and drying of the dishes is dehumidified and discharged by using the water jacket and the condensing duct or circulating duct module, the problem of condensed water formed at the time of humid air discharge can be solved. Moreover, noise caused by the humid air discharge can be reduced.

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  • Washing And Drying Of Tableware (AREA)
EP10003952A 2009-04-14 2010-04-14 Geschirrspüler Withdrawn EP2241242A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090032179A KR20100113730A (ko) 2009-04-14 2009-04-14 식기세척기

Publications (1)

Publication Number Publication Date
EP2241242A2 true EP2241242A2 (de) 2010-10-20

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ID=42239442

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EP10003952A Withdrawn EP2241242A2 (de) 2009-04-14 2010-04-14 Geschirrspüler

Country Status (4)

Country Link
US (1) US20100300499A1 (de)
EP (1) EP2241242A2 (de)
KR (1) KR20100113730A (de)
CN (1) CN101862171B (de)

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ITTO20110943A1 (it) * 2011-10-19 2013-04-20 Indesit Co Spa Macchina lavastoviglie
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US20100300499A1 (en) 2010-12-02
CN101862171B (zh) 2012-03-28
CN101862171A (zh) 2010-10-20

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