CN1897865B - Dishwasher with device for storage of rinsing water - Google Patents

Abstract

The invention relates to a dishwasher, with a storage container, for rinsing water, which is particularly simple and economical to produce, whereby the space loss in the dishwasher is kept very low, said storage reservoir being embodied as a flexible film bag, which may be matched in volume to the volume of the liquid, and wherein the dishwasher has a lye pump for pumping away the rinsing water from the dishwasher and a circulating pump for acting upon spray arms, and the film bag can be filled with filtered rinsing water via a filter system in the pump sump and a first rinsing water pipe from the circulating pump.

Description

Dishwashing machine with a device for storing washing liquid

technical field

The invention relates to a dishwasher with a device for storing washing liquid and to a method for storing washing liquid.

Background technique

In a dishwashing machine, the rinsing process is carried out according to a rinsing program generally consisting of the subprogram steps "pre-rinse", "cleaning", "intermediate rinsing", "rinsing" and "drying", for cleaning located in the dishwashing machine of washings. In order to achieve the best possible cleaning results, a pre-rinse step is usually provided in a rinsing program consisting of several subprogramme steps. In this case, coarse dirt is firstly removed from the laundry by a first washing liquid and finally drained out of the dishwasher with a first washing liquid after the pre-rinse process. The new water is then fed into the dishwasher for carrying out further partial program steps, such as cleaning, with the new rinsing liquid.

From DE 297 06 153 U1 a dishwashing machine with a water reservoir and a condensation dryer is known. The hot water for the final rerinsing process is stored in a storage container serving as a water reservoir and then fed back into the rinsing chamber of the dishwasher. The tableware is dried according to the principle of condensation. The air in the washing chamber is sucked out by a fan through a suction pipe and led through a condenser through a delivery pipe to the storage container. After cooling in the storage container, the air is heated in the condenser and sent to the flushing chamber.

A washing machine or dishwashing machine is known from DE 39 13 355 A1, which has a device for intermediate storage of used washing liquid and/or rinsing liquid for later reuse. The period of intermediate storage is obtained according to time and when a given time period is reached or exceeded, either an indication or signal is released or a lye pump for delivering intermediately stored washing and/or rinsing liquid is set to discharge by a control device. stream runs.

A method for operating a dishwasher and a dishwasher for carrying out the method are known from DE 42 43 605 A1. At the end of the rinsing in the middle of a partial program step, the washing liquid is removed from the rinsing container, stored in the storage container and returned to the rinsing container in the first partial program step in the subsequent rinsing program. The disadvantage here is that the storage container is not adapted to the space ratio, which leads to an unnecessary loss of space. Furthermore, a complex ventilation system is required for the storage container.

EP 05 46 348 A1 relates to a domestic dishwasher having a bag-shaped, collapsible, ie flexible, store or reservoir in a rigid or rigid container. The flexible storage bag is additionally used for intermediate storage of washing liquid.

In the washing machine of EP 0800785A2, by means of its lye pump, that is, the drain pump, waste water is pumped into a strong, rigid storage container during the pump-out phase of the washing program carried out for subsequent reuse. The same construction principle is also used in the washing machine or dishwashing machine of EP 0 607 628 A1.

Even in the washing machine of EP 0 771 898 A2 only a rigid, solid storage container for the intermediate storage of washing liquid from the last washing process of the washing program that has just been completed is used.

Contents of the invention

It is therefore the object of the present invention to provide a dishwasher and a method for operating the dishwasher, in which the storage container for the washing liquid is particularly simple and economical to produce and on the other hand the storage container The resulting loss of space in the dishwasher is very low and/or it is also possible to store the washing liquid in the storage container for a particularly long time without forming microorganisms.

This object is achieved according to the invention by a dishwasher of the type described below.

The above objects are also achieved by a method of the type described below.

The invention also relates to further advantageous refinements.

A dishwashing machine according to the invention is suitable for carrying out a rinsing program with at least one rinsing process with washing liquid, the dishwasher has a program controller, a rinsing container for the laundry to be cleaned, a System for circulating washing liquid and a storage container for washing liquid for storing and later reusing at least part of the washing liquid present in the dishwasher, the storage container consisting of a flexible film bag, which The capacity of the dishwasher is adapted to the liquid volume, and wherein the dishwasher has a lye pump for pumping washing liquid out of the dishwasher, a circulation pump for loading the rinse arm, and the film bag is passed through A filter system located in the pump sump and a first wash liquid pipe fed with filtered wash liquid by the circulation pump. As a result, any free space in the dishwasher can advantageously be used for storing washing liquid. As a result, no unnecessary space is lost for storing the washing liquid. Such a flexible film bag can be produced economically and simply and can be easily assembled or processed in a dishwasher. The washing liquid filtered in the pump tank is introduced into the membrane bag by using the circulation pump for filling the membrane bag according to the suction pipe structure to the circulation pump. This results in less contamination in the rinsing liquid lines and film bags. In addition, less protein and bacteria are produced. The washing liquid can thus be stored in the film bag without problems for a long period of time, for example several months.

Suitably, said film bag is preferably made of plastic or metal. Plastic is therefore a very economical material in particular, so that the processing of the film bag according to the invention is particularly inexpensive.

Preferably, the film bag is designed such that it can hold several washing liquids, preferably two washing liquids. The rinsing liquid is therefore advantageously stored for several partial program steps within a rinsing program by means of the film bag according to the invention.

In a further embodiment, the dishwasher has a lye pump for pumping washing liquid out of the dishwasher and a circulation pump for loading the rinse arm (Sprueharm), and the film bag can be passed through The first washing liquid pipe is added with washing liquid by a lye pump. The film bag can thus be filled with a lye pump.

In an additional embodiment, a water diverter is provided, which either opens the first washing line from the lye pump to the film bag or opens the second washing line from the lye pump to the drain when a shut-off valve is opened. Liquid pipe, the drain pipe can preferably be closed by another shut-off valve. In this way, a simple water switch can advantageously be used to control whether the washing liquid is fed by the lye pump to the drain or to the film bag.

Expediently, for the further introduction of washing liquid, the washing liquid from the film bag is introduced into the washing liquid circuit of the dishwasher via a third washing liquid line, which preferably leads from the film bag to the bottom of the rinsing container. Inside a pump pool. As a result, washing liquid can continue to be fed through a third washing liquid line independently of the filling of washing liquid.

Expediently, the first washing liquid line and/or the second washing liquid line and/or the third washing liquid line can each be closed by a shut-off valve. As a result, all washing liquid lines can advantageously be separated and opened or closed independently of one another, whereby the film bag can also be filled and emptied and the washing liquid drained into the drain.

Expediently, a first washing liquid line can be closed by a shut-off valve and is provided with a water diverter, which is used for loading or releasing one rinsing arm, both rinsing arms or not releasing the rinsing arm with water. The filling of the film bag can thus be controlled by a circulation pump.

Advantageously, for further feeding of washing liquid, washing liquid from the film bag can be introduced into a pump sump via the first washing liquid line when the shut-off valve is opened via the disconnected circulation pump. Advantageously, therefore, only one rinsing liquid line is required for filling and emptying the film bag.

Expediently, the operation of the lye pump and/or the circulation pump and the actuation of the shut-off valve are controlled by a preferably electronic program controller.

In a further embodiment, the film bag is arranged between an outer wall of the dishwasher and a side wall of a rinsing container of the dishwasher. As a result, a free space between the outer wall and the side wall of the rinsing container can be used for storing the washing liquid.

It is advantageous if the film bag is arranged between a top wall of the dishwasher and a top wall of the rinsing container. This free space can thus also be used to store washing liquid.

Expediently, the film bag has at least one opening for the introduction or discharge of washing liquid, which preferably opens into the first washing liquid line.

In a further variant, the flexible film bag and/or the washing liquid line are at least partially coated on the water-conducting inner side in an anti-bacterial manner, for example with Agion. This limits the growth of bacteria and algae, so that the washing liquid can be stored for a longer period of time and deposits and contamination are prevented. This increases the operational safety, since, for example, contamination does not impede the operation of the shut-off valve or the pump.

In another dishwashing machine according to the invention, which is suitable for carrying out a rinsing program with at least one rinsing process using washing liquid, the dishwasher has a program controller, a rinsing chamber containing the laundry to be cleaned container, a system for circulating the washing liquid and a storage container for the washing liquid for storing and later reusing at least a part of the washing liquid present in the dishwasher, and the dishwasher has a A lye pump for pumping washing liquid out of the dishwasher and a circulation pump for loading the rinsing arm, wherein the storage container can be filled with filtered washing liquid by the circulation pump.

In a method according to the invention for operating a dishwasher, the washing liquid present in the dishwasher is at least partially withdrawn from the washing liquid circuit of the dishwasher at the end or during the rinsing process and Introduced into a flexible film bag whose capacity is adapted to the volume of liquid, and the washing liquid is at least partially drained from the flexible film bag and re- Feed into the washing liquid circuit of the dishwasher, wherein the washing liquid present in the dishwasher is at least partly taken out of the pump sump by means of the circulation pump via the dishwasher filter system present there and is introduced filtered into the membrane inside the bag. As a result, any free space in the dishwasher can advantageously be used for storing washing liquid. There is thus no unnecessary loss of space due to storage of washing liquid. Such a flexible film bag can be produced economically and simply and simplifies assembly and processing in the dishwasher. The film bag is filled by using a circulating pump according to the structure of the suction pipe to the circulating pump so that the filtered washing liquid in the pump tank is introduced into the film bag. As a result, less contamination and less algae and bacteria build up in the rinsing liquid line and in the film bag. The washing liquid can therefore be stored in the film bag without any problems for a long period of time, for example several months.

In a further variant of a method for operating a dishwasher, the washing liquid present in the dishwasher is at least partially drained from the dishwasher at the end or during the rinse subprogramme step of a rinsing program. is withdrawn from the washing liquid circuit and introduced into the flexible film bag and is at least partially drained from the flexible film bag before or with the start of the pre-rinse subprogramme step of the subsequent rinsing program and conveyed to the dishwashing inside the washing liquid circuit of the machine. As a result, particularly clean washing liquid is intermediately stored in the film bag and used in a partial program step prerinsing in which slight contamination in the washing liquid is not important.

It is expedient for the rinsing liquid from the film bag to be fed back into the rinsing liquid circuit of the dishwasher before or with the start of the intermediate rinsing sub-program step.

Expediently, the rinsing liquid from the flexible film bag which is fed back into the rinsing liquid circuit of the dishwasher is only used for cleaning the rinsing container of the dishwasher.

In another method for operating a dishwasher, the washing liquid present in the dishwasher is at least partially removed from the washing liquid circuit of the dishwasher at the end or during the rinsing process and introduced into a storage container and is at least partly drained from the storage container before the subsequent rinsing process or with the start of the process and fed back into the washing liquid circuit of the dishwasher, wherein the storage container is filled with filtered liquid by a circulation pump detergent.

Description of drawings

The invention is described in detail below with the aid of preferred exemplary embodiments and with reference to the drawings. In the attached picture:

FIG. 1 shows an embodiment of the invention of a dishwasher according to the invention in a perspective view,

FIG. 2 shows a perspective view of another preferred embodiment of the invention of the dishwasher according to the invention,

FIG. 3 shows the method according to the invention for operating the dishwasher according to the invention in a schematic block diagram of a first embodiment of the invention,

FIG. 4 shows the method according to the invention for operating the dishwasher according to the invention in a schematic block diagram of a second embodiment of the invention.

Detailed ways

The dishwasher 9 according to the invention shown in FIG. 1 comprises a rinsing container 11 into which two crockery baskets 12 for receiving the laundry to be cleaned can be inserted in a drawer-like manner. The dishwasher 9 has a flap door 13 on its front, which can be swiveled into a horizontal position for loading the cutlery basket 12 . In the operating state, the cutlery basket 12 is inserted into the rinsing container 11 and the flap 13 is closed. In the illustrated embodiment of the dishwasher 9 according to the invention, a storage container 17 for washing liquid is arranged between an outer wall (not shown) of the dishwasher 9 and a side wall 14 of the rinsing container 11 , preferably fixed on the side wall 14 of the flushing container 11.

A method for operating the dishwasher can be carried out according to the invention by means of the dishwasher 9 shown in FIG. During an arbitrary sub-program step of the rinsing program, at least partly is taken out from the washing liquid circuit of the dishwasher 9 and introduced into the flexible film bag 17 and the washing liquid present in the film bag 17 is made available in a second step. In a subsequent rinsing process, before an optional sub-program step of the rinsing program of the next rinsing process or with the start of this step, at least partly is drained from the film bag 17 and fed to the washing liquid circuit of the dishwasher 9 again. . Here the film bag 17 is clamped between the outer wall or another limiting device, for example a grille (not shown) and a side wall of the flushing container 11, so that the flexible film bag 17 fits optimally, That is, the space between the outer wall or another limiting device and the side wall of the flushing container 11 is fully utilized.

The filling and emptying of the film bag 17 are each effected via at least one opening 15 in the film bag 17 . In order to ensure complete filling and emptying of the film bag 17 , the opening 15 for filling and draining the washing liquid is located at the bottom of the film bag 17 . In this way, any rinsing residues that may have been carried along with the rinsing liquid, which may have settled in the film bag 17 during storage of the rinsing liquid, are drained away with the rinsing liquid being drained from the film bag 17 . The addition and possible emptying of washing liquid in or from the film bag 17 is realized by a pump, wherein it is best to make full use of the circulation pump (not shown) or the lye pump (not shown) of the dishwashing machine 9 ) pump power.

The dishwasher 9 according to the invention with a flap 13 shown in FIG. 2 has a film bag 17 as a reservoir for washing liquid. The film bag 17 rests against the top wall 18 of the rinsing container 11 and thus lies in a free space (not shown) between the top wall 16 of the dishwasher 9 and the top wall 18 of the rinsing container 11 . The film bag 17 generally has fastening elements integrated into the film bag 17 , by means of which the film bag 17 can be fastened very conveniently to the dishwasher (not shown) during assembly. The film bag 17 has an opening 15 which is particularly advantageous for a film bag 17 which is very economical to produce and which can be adapted to the spatial dimensions due to its flexible properties. The adaptation of the membrane bag 17 according to the invention to the volume of the stored washing liquid and to the spatial proportions is preferably produced by the mobility and/or expansion of the membrane. The available free space can thus be optimally utilized. Furthermore, no degassing is required, since the flexible film bag 17 is adapted to changing washing liquid volumes. The film bag 17 can hold multiple washing liquids, preferably two washing liquids. The film bag can be arranged at any other position in the dishwasher with free space, for example below the rinsing container 11 or on the rear wall of the rinsing container 11 . The shape of the free space is likewise arbitrary, the film pocket 17 need only have a correspondingly adapted shape.

FIG. 3 shows a schematic block diagram illustrating a first embodiment of the method according to the invention for operating a dishwasher according to the invention. In this embodiment of the method according to the invention, a lye pump is used to fill the film bag 17 with washing liquid. The film bag 17 is filled via a first rinsing liquid line 1 from the lye pump to the film bag 17 , wherein the lye pump draws rinsing liquid from a pump sump on the bottom of the rinsing container 11 .

A second washing liquid line 2 in FIG. 3 leads from the lye pump to a drain, through which washing liquid can be conveyed from the dishwasher 9 . The drain has a non-return valve 5 for preventing used washing liquid from flowing backwards from the drain into the dishwasher 9 . In order to better control the flow path of the washing liquid through the washing liquid pipes 1, 2, 3, a shut-off valve 6, 7, 8 is respectively arranged in the washing liquid pipes 1, 2, 3, and they are opened or closed when necessary Associated wash solution tubes 1, 2, 3. The shut-off valve 7 in the first rinsing liquid line 1 between the lye pump and the membrane bag 17 serves in particular to prevent an undesired backflow of rinsing liquid from the filled membrane bag 17 through the lye pump into the pump sump. When an inlet pipe is used, it terminates at the top of the storage vessel without shut-off valve 7 (not shown). The emptying of the film bag 17 into the rinsing container 11 or the drain 5 is generally by gravity with corresponding controls via at least one shut-off valve or a water diverter. This shut-off valve can also be integrated on the through-flow heater.

But the control of the washing liquid flow path can also be realized by the water diverter 4, which either opens the first washing liquid pipe 1 from the lye pump to the film bag 17 or opens the second washing liquid pipe 2 from the lye pump to the drain . In this way, during operation of the lye pump, either the film bag 17 is fed with washing liquid via the first washing liquid line 1 or the washing liquid is conveyed from the dishwasher 9 to the drain via the second washing liquid line 2 .

The further conduction of washing liquid from the film bag 17 to the washing liquid circuit of the dishwasher 9 takes place via a third washing liquid line 3 , which leads from the film bag 11 to the pump sump in the bottom of the rinsing container 11 . In the pump sump, the washing liquid is conveyed by a circulating pump into the washing liquid circuit with the rinsing arm. An electronic program controller (not shown) coordinates and controls the operation of the lye pump, the circulation pump and the operation of the water diverter 4 and the shut-off valves 6, 7, 8.

The schematic block diagram used to represent the method shown in FIG. 3 can also be changed in that only one opening and thus a washing liquid pipe is arranged on the film bag 17, in which the first washing liquid pipe 1 and the second washing liquid pipe Wash solution line 2 is combined into one wash solution line. A branch (not shown) to the shut-off valves 7, 8 is required at the end of this common washing liquid line. Furthermore, the filling and emptying of the film bag 17 can be effected by any other suitable device or other method.

FIG. 4 shows a schematic representation of a second preferred embodiment of the invention for the method for operating a dishwasher according to the invention. In this embodiment of the method according to the invention, a circulation pump is used to fill the film bag 17 with washing liquid. Filling of the film bag 17 is effected via a first washing liquid line 1 when the shut-off valve 7 is opened from the circulation pump to the film bag 17 , which draws in washing liquid from a pump sump on the bottom of the rinsing container 11 . When the shut-off valve 7 is closed, the washing liquid is introduced into the flushing arm through the water diverter 4 . The flow resistance of the flushing arm when the shut-off valve 7 is opened is sufficient to fill the film bag 17 . Therefore, generally no additional shut-off valve (not shown) is required immediately before the water diverter 4 or the water diverter 4 needs to be closed for filling the film bag 17 .

As a result, the filtered washing liquid is pumped into the membrane bag 17 in a particularly advantageous manner. The washing liquid sucked from the circulation pump in the pump pool is filtered by a filter system generally set in the pump pool. The filter system generally consists of multiple filters, such as a coarse filter and a fine filter, because the circulation pump is in The suction hose in the pump pool is set up differently than the lye pump suction hose. This makes it possible to prolong the residence time of the washing liquid in the film bag 17 and to produce no or only very little deposits in the film bag 17 and/or in the washing liquid line 1 . Blockages due to deposits in the washing liquid line 1 and/or shut-off valve 7 can thus be prevented. Furthermore, the growth of bacteria, microorganisms and algae is substantially limited, since nutrients for these organisms are removed. The emptying of the film bag 17 to the flushing container 11 or drain 5 is generally effected by gravity by opening the shut-off valve 7 . When the shut-off valve 7 is opened, the washing liquid flows back into the pump sump via the washing liquid line 1 through the disconnected circulation pump, preferably by gravity.

The operation of the lye pump and the circulation pump and the operation of the water diverter 4 and the shut-off valve 1 are coordinated and controlled by an electronic program controller.

The washing liquid stored in the film bag 17 can also be used for intermediate swallowing (cleaning the sieve by alternately operating the lye pump and the circulation pump momentarily) except preferably for the pre-rinsing process of a subsequent cleaning program.

The film bag 17 and/or the washing liquid pipes 1 , 2 , 3 can be coated on the water-conducting inner wall in a bacteria-proof manner, for example by Agion.

As a result, significantly fewer bacteria or microorganisms deposit on the inner walls of the components 1 , 2 , 3 , 6 , 7 , 8 , 17 . As a result, the residence time of the washing liquid in the film bag 17 can be increased and clogging of the washing liquid lines 1 , 2 , 3 due to deposits can be prevented.

List of reference signs

1 Washing liquid line between pump and storage container

2 Washing liquid tube for drain

3 Washing liquid pipe between film bag and pump tank

4 water fork

5 Check valve in drain pipe

6 Shut-off valve in washing liquid line 2

7 Shut-off valve in washing liquid line 1

8 Shut-off valve in washing liquid line 3

9Dishwashing machine

11 rinse container

12 cutlery basket

13 The flap door of the dish washing machine 9

14 Rinse the side wall of the container 11

15 opening in storage container 10

16 top wall of dishwashing machine 9

17 film bags

18 wash the top wall of the container 11

Claims (13)

1. table-ware washing machine, it is suitable for carrying out one and has the cleaning procedure that at least one uses the flushing process of cleaning solution, this table-ware washing machine has a cyclelog, an eluant container (11) that is used to hold the washings that will be cleaned, a system and a reservoir vessel that is used for cleaning solution that is used to make the cleaning solution circulation, this reservoir vessel is reused the cleaning solution that at least a portion exists at table-ware washing machine (9) after being used for storing also, wherein, described reservoir vessel is made of the bag film (17) of flexibility, its capacity can adapt to liquid volume, and wherein said table-ware washing machine (9) has a lye pump that is used for pumping from table-ware washing machine (9) cleaning solution, a circulating pump that is used to make the rinse arm loading, and described bag film (17) is added the cleaning solution that has filtered by a filtration system and one first washing lotion tube (1) that is arranged in the pump pond by circulating pump.

2. table-ware washing machine as claimed in claim 1, wherein said bag film (17) is made by plastics or metal.

3. table-ware washing machine as claimed in claim 1 or 2 wherein so constitutes described bag film (17), makes it can hold multiple cleaning solution.

4. table-ware washing machine as claimed in claim 1, wherein said first washing lotion tube (1) can be closed by a stop valve (7), and be provided with a water branch road device (4), this water branch road device discharges a rinse arm or discharges two rinse arm or do not discharge rinse arm to be used to load water.

5. table-ware washing machine as claimed in claim 1 wherein makes the cleaning solution from bag film (17) import to pump pond the inside by the circulating pump that disconnects by first washing lotion tube (1) when opening stop valve (7) in order to continue to import cleaning solution.

6. table-ware washing machine as claimed in claim 1 or 2, the manipulation of the operation of wherein said lye pump and/or circulating pump and stop valve (6,7,8) is controlled by the cyclelog of electronics.

7. table-ware washing machine as claimed in claim 1 or 2, wherein said bag film (17) are arranged between the sidewall (14) of eluant container (11) of outer wall of table-ware washing machine (9) and table-ware washing machine (9).

8. table-ware washing machine as claimed in claim 1 or 2, wherein said bag film (17) are arranged between the roof (18) of the roof (16) of table-ware washing machine (9) and eluant container (11).

9. table-ware washing machine as claimed in claim 1 or 2, wherein said bag film (17) has the perforate that at least one is used to import or discharge cleaning solution, and it leads to first washing lotion tube (1) the inside.

10. table-ware washing machine as claimed in claim 1 or 2, bag film of wherein said flexibility (17) and/or washing lotion tube (1,2,3) carry out coating at least partly fungi-proofingly on the medial surface of water guide.

11. be used for making method a kind of as each the described table-ware washing machine operation of above-mentioned claim, wherein the cleaning solution that exists in table-ware washing machine (9) is when finishing or take out from the cleaning solution loop of table-ware washing machine (9) at least in part during flushing process, and import to inside the flexible bag film (17), the capacity of this bag film adapts to liquid volume, and before the flushing process of following or along with the described cleaning solution of the beginning of this flushing process is discharged from the bag film (17) of flexibility at least in part, and be transported to again inside the cleaning solution loop of table-ware washing machine (9), wherein the cleaning solution that exists in table-ware washing machine (9) takes out by table-ware washing machine (9) filtration system that exists there from the pump pond by circulating pump at least in part, and is subjected to import to bag film (17) the inside with filtering.

12. the method that is used to make a table-ware washing machine operation as claimed in claim 11, wherein the cleaning solution that exists in table-ware washing machine (9) takes out from the cleaning solution loop of table-ware washing machine (9) when finishing or during the rinsing branch step at a cleaning procedure at least in part, and import to inside the flexible bag film (17), and before the pre-flushing branch step of the cleaning procedure of following or along with the beginning of this step is discharged from the bag film (17) of flexibility at least in part, and be transported to again inside the cleaning solution loop of table-ware washing machine (9).

13. method as claimed in claim 11 is wherein from before the branch step of underway the flushing of cleaning solution of bag film (17) or be transported to the inside, cleaning solution loop of table-ware washing machine (9) again along with the beginning of this step.

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