US20110036382A1 - Dishwasher with connection device for a plurality of water inlet lines - Google Patents

Dishwasher with connection device for a plurality of water inlet lines Download PDF

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Publication number
US20110036382A1
US20110036382A1 US12/849,855 US84985510A US2011036382A1 US 20110036382 A1 US20110036382 A1 US 20110036382A1 US 84985510 A US84985510 A US 84985510A US 2011036382 A1 US2011036382 A1 US 2011036382A1
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Prior art keywords
water
dishwasher
connection
inputs
connection device
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Abandoned
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US12/849,855
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English (en)
Inventor
Christian Ertl
Markus Gram
Bernd Heisele
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.)
BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Assigned to BSH BOSCH UND SIEMENS HAUSGERAETE GMBH reassignment BSH BOSCH UND SIEMENS HAUSGERAETE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Gram, Markus, ERTL, CHRISTIAN, HEISELE, BERND
Publication of US20110036382A1 publication Critical patent/US20110036382A1/en
Abandoned 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops

Definitions

  • the invention relates to a dishwasher, in particular a domestic dishwasher, having a plurality of water connections.
  • DE 197 17 449 A1 discloses a washing machine having a warm water supply and a cold water supply.
  • the warm water supply comprises a warm water valve and the cold water supply comprises a cold water valve, these being controllable by means of a controller of the washing machine.
  • the object underlying the invention is to provide a dishwasher, in particular a domestic dishwasher, having at least two water connections, in particular a cold water connection and a warm water connection, with improved water feed.
  • the object of the invention is achieved by means of a dishwasher, in particular a domestic dishwasher, having a plurality of water connections, and a connection device which has a plurality of inputs that are attached to the water connections, in particular via water inlet lines, and one output, and which is embodied in such a way that it opens the input whose assigned water connection supplies water and seals the other input or all other inputs automatically when the relevant input is open.
  • the connection device embodied according to the invention prevents the possibility of unintended filling of the cold water inlet line with warm water and the warm water inlet line with cold water.
  • the inventive connection device therefore allows the selective supply of currently desired water volumes from the plurality of water connections into the dishwasher in a controlled manner.
  • the inventive connection device As a result of the isolation of the plurality of water inlet paths by means of the inventive connection device it is moreover possible reliably to prevent any impurities in the water of the first water connection, such as e.g. a warm water connection, from being introduced via the water inlet line of the second water connection, such as e.g. a cold water connection, into its upstream water supply system, e.g. a drinking water network.
  • a warm water connection such as e.g. a warm water connection
  • the second water connection such as e.g. a cold water connection
  • the inventive dishwasher has a plurality of water connections by means of which it can be connected to e.g. one and the same water supply system, in particular a water network, or a plurality of independent water supply systems and/or installations.
  • This beneficial bithermal multiple, in particular “duo”, connection is advantageous in particular for increasing the energy efficiency and/or drying performance of the dishwasher, since it allows the washing-stage-specific, i.e.
  • the supply of the dishwasher with warm water or hot water from an external warm water supply installation is advantageous in particular if its warm water or hot water is generated exclusively, i.e. solely, or at least to some extent with the aid of a thermal solar system.
  • the inventive dishwasher has a common connection device that on one side is attached by its inputs to the two different water connections and on the other side comprises an output, this being attached e.g. to a water inlet part of the dishwasher, in such a way that water from the relevant selected open water connection can only flow into the inventive dishwasher in a forward direction, but cannot cross-couple in a reverse direction to the other water connection, which is not currently carrying water.
  • connection device is embodied so as both to open that one of its inputs whose assigned water connection is currently supplying water, and also to seal its other inputs automatically, in particular as a result solely of the water pressure becoming effective in the water-carrying input.
  • the automatic closure of the input or inputs whose water connections do not currently supply water is realized by embodying the connection device such that the relevant input opens and the other input or inputs are sealed as a result of the water pressure of the water connection that does supply water.
  • the connection device therefore functions automatically without additional (electronic) control.
  • connection device can preferably have a sealing means which opens the relevant input and seals the other input or inputs.
  • This sealing means is preferably activated or set as a result of the water pressure of the water of the water connection which is currently supplying water.
  • the connection device can have a hollow main body, in the interior of which the sealing means is movably mounted. As a result of the movable mounting it is possible with relative ease for the water pressure to move the sealing means and hence open the relevant input and seal the other input or inputs.
  • the main body can preferably be embodied in the form of a hollow cylinder.
  • the main body can be embodied as a hollow circular cylinder and in particular in the form of a straight circular hollow cylinder.
  • connection device has exactly two inputs, these being connected to opposite ends of the main body. Consequently, the water pressure can where necessary push the sealing means away from the input receiving the water flow and toward the opposite input, whereby the connection device input to which water is applied opens automatically, solely as a result of the water pressure, and the other input closes automatically.
  • the output can be connected in particular to the lateral surface of the main body, in particular essentially midway between the two inputs. It is then possible for the sealing means to leave the output free with minimal impedance, thereby allowing an unimpeded flow of water from the relevant water connection via the connection device into the appliance interior of the inventive dishwasher.
  • the sealing means is embodied as a piston which is displaceably mounted in the main body. This can be moved with particular ease by the water pressure, thereby increasing the operating reliability of the inventive dishwasher.
  • connection device in such a way that the sealing means, which is implemented in particular as a piston, is pushed by the water pressure of the water-supplying water connection toward the input situated opposite to the input that is attached to the water-supplying water connection, in order to close this and to open the input that is attached to the water-supplying water connection.
  • the water connections of the inventive dishwasher are preferably embodied as inlet valves or supply valves.
  • the inlet valves comprise e.g. magnetic valves, preferably aquastop valves, which are opened and closed e.g. by a control device of the inventive dishwasher, in order to control e.g. the water inlet of the inventive dishwasher.
  • the inlet valves can be attached to the inputs of the connection device via water feed lines which are embodied in particular as water hoses.
  • water feed lines which are embodied in particular as water hoses.
  • the convenience of connecting the inventive dishwasher to the water network is increased in particular if the water hoses are implemented to be flexible.
  • the water hoses can preferably run inside sleeving hoses. If one of the water hoses leaks, for example, the corresponding sleeving hose can capture the escaping water.
  • the inlet valves, the water feed lines and the connection device can preferably form a waterstop system. This then has a security mechanism if applicable, in order to prevent the inlet of water if there is a fault in the water hoses in particular, e.g. by means of the control device automatically blocking the inlet valves.
  • the invention therefore provides a bithermal or duothermal water connection where appropriate, i.e. a cold water connection and a warm water connection at the same time, or expressed even more generally, preferably as a multithermal water connection, having a type of integrated non-return valve at the common junction point or coupling region, which largely or completely blocks, i.e. prevents, any reverse flow or “crossover”, i.e. from one water supply line to the other against its water supply direction.
  • the inventive dishwasher can be utilized in particular in conjunction with solar energy. Increasing use is being made of solar energy for the purpose of generating warm water. Owing to the fact that this energy is available for heating at essentially no cost during the summer months, its use should be maximized at this time of year.
  • the dishwasher can utilize this free energy efficiently, at least relatively efficiently, and largely without compromising washing and drying performance or even with improved washing and drying performance, if the solar energy provides a sufficient contribution to the warm water supply of e.g. a building, preferably a house.
  • the dishwasher is equipped with the inventive connection device, preferably internally, such that its two separate inputs can be connected to at least two separately controllable water connections, in particular having integrated waterstop valves or so-called aquastop valves, for cold water inlet and warm water inlet.
  • the inventive connection device preferably internally, such that its two separate inputs can be connected to at least two separately controllable water connections, in particular having integrated waterstop valves or so-called aquastop valves, for cold water inlet and warm water inlet.
  • one of the valves is therefore used as appropriate for the connection to the inexpensive water supply which is based partly or fully on solar heating, and the other valve is used for the connection to the customary cold water connection line. Both valves can be used separately from each other.
  • the two valves are connected together via e.g.
  • connection piece which joins the lines together as an advantageous connection device within the dishwasher, in particular the domestic dishwasher.
  • a dual-action non-return valve prevents in particular the flow of the liquid from one side to the other, i.e. “crossover reverse flow”.
  • this non-return valve seals the outflow to the other valve (and vice versa).
  • the water then has only a one-way option, flowing via the output of the connection piece and only into the appliance.
  • the waterstop or aquastop valves themselves themselves only to be controllable to the extent that, with their assistance, the water flow can be controlled in the supply direction to the dishwasher, i.e. they open and block the water flow in the inlet direction only. In this case they need not always be sufficiently pressure-resistant in the opposite direction, i.e. in the reverse direction.
  • the inventive connection device provision is made for largely preventing a water volume from uncontrollably entering the relevant other water supply line, which is currently not carrying water, in the reverse direction and reaching its aquastop valve on the upstream side.
  • the inventive connection device and its junction part for its inputs, to which water inlet lines with upstream terminal aquastop valves can be connected can be provided in particular in the interior of the relevant dishwasher or possibly alternatively thereto as an external junction piece.
  • a currently running dishwashing program could be adversely affected by unintended fillings.
  • an unintended filling of the warm water supply line with backward-flowing cold water could result in, instead of a requested warm water volume having a specific minimum temperature, merely a different water volume mixture of cold water and subsequent warm water arriving in the washing compartment of the dishwasher, said mixture having a combined temperature that is too low.
  • the delivery of warm water from the warm water connection is then advantageously activated, in particular by means of an operator pressing a special operating button on the dishwasher or in particular by means of an automatic selection by the control unit of the dishwasher, if a dishwasher-internal heating device is less efficient than the external warm water supply installation, i.e. would require higher energy consumption than this to provide warm water.
  • FIG. 1 schematically shows a domestic dishwasher which is embodied according to an advantageous embodiment variant of the invention
  • FIG. 2 schematically shows an exemplary embodiment variant of an inventive water supply system of the domestic dishwasher from FIG. 1 .
  • FIG. 3 schematically shows an exemplary connection device of the water supply system from FIG. 2 .
  • FIG. 1 shows a domestic dishwasher 1 in cross-section as an example of a water-carrying domestic appliance.
  • the domestic dishwasher 1 has a washing compartment 2 for holding items to be washed which can be arranged e.g. in an upper rack 3 and a lower rack 4 .
  • At least two spray devices for applying a liquid to the dishes are arranged in the washing compartment 2 , said liquid normally being referred to as washing liquor.
  • the spray devices are embodied as upper and lower spray arms 5 , 6 .
  • the liquid can be conveyed by a circulating pump 7 via a first liquid feed line 8 to the upper spray arm 5 and via a second liquid feed line 9 to the lower spray arm 6 .
  • the circulating pump 7 is driven e.g. by means of an electrical drive which is not shown in greater detail, and in particular by means of the electric motor of said electrical drive.
  • the liquid is heated in a subprogram step of a washing program of the domestic dishwasher 1 by means of a flow-through water heater 10 which is connected by means of an input nozzle 11 to the circulating pump 7 and by means of output nozzles 12 , 13 to the liquid feed lines 8 , 9 .
  • the number of output nozzles 12 , 13 corresponds to the number of spray arms 5 , 6 or concurrently operated groups of spray arms 5 , 6 .
  • the liquid that is conveyed by the circulating pump 7 in the case of the present exemplary embodiment is accordingly carried to the input nozzle 11 of the flow-through heater 10 and from the output nozzles 12 , 13 thereof via the liquid feed lines 8 , 9 to the spray arms 5 , 6 .
  • the domestic dishwasher 1 additionally has a water switch 14 which is e.g. arranged in the flow-through water heater 10 or is integrally molded on the latter.
  • the water switch 14 can, however, also be e.g. arranged independently in the domestic dishwasher 1 or connected directly to the circulating pump 7 .
  • the spray arms 5 , 6 can be in each case alternately and/or continuously supplied with the liquid, this being achieved by means of opening one liquid outlet and closing another liquid outlet of the water switch 14 .
  • FIG. 2 shows a water supply system of the domestic dishwasher 1 having a plurality of water connections.
  • the domestic dishwasher 1 has a plurality of water connections, in particular in the form of a first inlet valve 15 and a second inlet valve 16 .
  • the inlet valves 15 , 16 are e.g. magnetic valves and are attached to a control device of the domestic dishwasher 1 in a manner which is not shown, said control device being configured inter alia to control the operation of the domestic dishwasher 1 and to open and close the inlet valves 15 , 16 selectively, i.e. independently of each other.
  • the two inlet valves 15 , 16 are provided for connection to a water line which is not illustrated in greater detail or to a water supply network.
  • One of the inlet valves 15 , 16 can be connected for example to a cold water connection and the other to a warm water connection or a hot water connection, in order to supply cold or preheated water to the domestic dishwasher 1 .
  • the water supply system of the domestic dishwasher 1 comprises a connection device 17 , as shown in FIG. 3 , having a first input 18 , a second input 19 and an output 20 .
  • the first input 18 is attached to the first inlet valve 15 via a water feed line, in particular via a first water hose 21
  • the second input 19 is attached to the second inlet valve 16 via a further water feed line, in particular via a second water hose 22 .
  • the output 20 of the connection device 17 is attached to an appliance inlet of the domestic dishwasher 1 e.g. via a further water hose.
  • the water arriving from the water connections enters the washing compartment 2 via the appliance inlet in order to form the washing liquor when it is mixed with a detergent.
  • connection device 17 has a main body 23 which is implemented in particular in a hollow cylindrical shape and is made e.g. of metal or plastic.
  • the main body 23 is implemented in particular in the shape of a circular cylinder and has in particular the form of a circular cylinder that is in particular straight.
  • the two inputs 18 , 19 connect to the two ends of the main body 23 , i.e. to the base surfaces of the circular cylinder.
  • the output 20 of the connection device 17 connects to the lateral surface of the circularly cylindrical main body 23 , in particular midway between the two inputs 18 , 19 .
  • a movable sealing means e.g. in the form of a piston 24 is displaceably mounted within the main body 23 , in particular along the longitudinal axis L of the main body 23 .
  • the piston 24 is provided so as to be moved in a translational manner between a first position, in which it opens the first input 18 and seals the second input 19 , and a second position, in which it seals the first input 18 and opens the second input 19 , i.e. linearly back and forth in this case.
  • the output 20 is always open in this case.
  • the piston 24 is displaceably mounted along the longitudinal axis L of the main body 23 . Consequently it is possible, depending on which of the two inlet valves 15 , 16 opens, i.e. allows water to flow in via the water hoses 21 , 22 in the direction of the connection device 17 , and solely as a result of the water pressure of the water flowing through the relevant inlet valve 15 , 16 and the subsequent water hose 21 , 22 , for the piston 24 to be pressed against the relevant input 18 , 19 which is attached to the inlet valve 15 , 16 that is currently blocked.
  • the water supply system can be implemented as a waterstop system and accordingly include a safety mechanism in order to prevent the supply of water if there is a fault in particular in the water hoses 21 , 22 , e.g. by means of the control device automatically blocking the inlet valves 15 , 16 .
  • the two water hoses 21 , 22 can be implemented as double hoses for this purpose.
  • connection device 17 is arranged inside the domestic dishwasher 1 , and the water hoses 21 , 22 are guided e.g. through a rear wall 25 of the domestic dishwasher 1 .
  • connection device in which a plurality of water hoses, i.e. generally expressed as a plurality of water inlet lines, are merged into a common output or connected thereto, provision is therefore made for a common backflow preventer which closes or blocks the water inlet line that is not currently supplying water in the inlet direction, against inflow of water in a reverse direction from the other water inlet line which is currently supplying water to the common outlet line.
  • This backflow preventer therefore functions as a type of water inlet branch which only allows an outflow of incoming water to its output and no backflow to its other input.
  • this backflow preventer ensures that the two different water inlet flows, in particular hot and cold water, cannot be mixed together in the water inlets upstream of said backflow preventer in the feed lines, in particular as far as the respective water connection, preferably a faucet.
  • a strict separation of the two water inlet flows from each other is ensured at all times.
  • a desired warm water volume and a desired cold water volume can be supplied to the output of the connection device selectively, i.e. separately at different inlet times and in a precisely controllable manner, i.e. metered.
  • desired quantities of warm or cold water can be fed in a specifically metered manner via the output of the connection device into the liquid inlet system of the dishwasher for the purpose of carrying out the various partial wash cycles of a current wash cycle of a selected dishwashing program of a domestic dishwasher.
  • This allows specific proportioning of a defined required warm water volume for at least one first partial wash cycle, e.g. cleaning cycle or rinsing cycle, and a defined required cold water volume for at least one second partial wash cycle, e.g. prewash cycle, intermediate wash cycle and/or other filling operation, e.g.
  • the dishwasher can be operated with greater energy efficiency and/or greater drying efficiency.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
US12/849,855 2009-08-17 2010-08-04 Dishwasher with connection device for a plurality of water inlet lines Abandoned US20110036382A1 (en)

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DE102009028591A DE102009028591A1 (de) 2009-08-17 2009-08-17 Geschirrspülmaschine mit Anschlussvorrichtung für mehrere Wasserzulaufleitungen
DE102009028591.1 2009-08-17

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140174569A1 (en) * 2012-12-21 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher, in particular domestic dishwasher
CN104224077A (zh) * 2013-06-08 2014-12-24 林波荣 用于食堂或餐厅洗碗机的节能系统
WO2017108358A1 (en) * 2015-12-25 2017-06-29 Arcelik Anonim Sirketi A washer
CN110856641A (zh) * 2018-08-24 2020-03-03 青岛海尔洗碗机有限公司 一种喷淋器引水机构及洗碗机
CN112587060A (zh) * 2020-12-04 2021-04-02 珠海格力电器股份有限公司 洗碗机自供水方法、洗碗机
US20220273158A1 (en) * 2019-05-07 2022-09-01 Illinois Tool Works Inc. System for optical wash item recognition in dishwashers, method for optical wash item recognition, dishwasher with an optical wash item recognition system and method for operating such a dishwasher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105816038A (zh) * 2015-12-03 2016-08-03 深圳市易安诺科技有限公司 兼容多种饮用水源的饮水机

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WO2006072515A1 (de) * 2005-01-03 2006-07-13 BSH Bosch und Siemens Hausgeräte GmbH Steuereinheit für den zulauf von wasserführenden haushaltgeräten

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140174569A1 (en) * 2012-12-21 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher, in particular domestic dishwasher
US9402527B2 (en) * 2012-12-21 2016-08-02 BSH Hausgeräte GmbH Dishwasher, in particular domestic dishwasher
CN104224077A (zh) * 2013-06-08 2014-12-24 林波荣 用于食堂或餐厅洗碗机的节能系统
WO2017108358A1 (en) * 2015-12-25 2017-06-29 Arcelik Anonim Sirketi A washer
CN110856641A (zh) * 2018-08-24 2020-03-03 青岛海尔洗碗机有限公司 一种喷淋器引水机构及洗碗机
US20220273158A1 (en) * 2019-05-07 2022-09-01 Illinois Tool Works Inc. System for optical wash item recognition in dishwashers, method for optical wash item recognition, dishwasher with an optical wash item recognition system and method for operating such a dishwasher
CN112587060A (zh) * 2020-12-04 2021-04-02 珠海格力电器股份有限公司 洗碗机自供水方法、洗碗机

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DE102009028591A1 (de) 2011-02-24
EP2286711A3 (de) 2015-01-21

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