DE102009011571A1 - Household appliance i.e. dishwasher, has pump circuit including pump for pressurizing operating fluid and control element for operating filter element, which is used for filtering operating fluid in filter phase - Google Patents

Abstract

The household appliance has a pump circuit for transferring operating fluid i.e. operating water. The pump circuit has a pump for pressurizing the operating fluid, a distribution unit i.e. spray arm, for distributing the operating fluid within an operating space and a collector unit i.e. collecting tray, for collecting the distributed operating fluid. The spray arm is pivotable around an axis. The pump circuit has a control element for operating a filter element, which is used for filtering the operating fluid in a filter phase. The filter element has a coding and/or identification device. A bacterial contamination-preventive additive e.g. biocide and/or fungicide, is added into the operating fluid.

Description

The The invention relates to a household appliance according to the preamble of Claim 1.

Domestic dishwashing machines are common with dosing devices for the detergent addition in the rinsing process fitted. These are commercially available dishwashers the metering devices equipped with a cleaning chamber, the for the absorption of liquid or solid, for example powdered or tablet-shaped cleaner is provided. This cleaning chamber is closed with a lid, wherein a trip unit is provided to the cover over a corresponding actuator unit, For example, to open a control coil at the appropriate time. Of the flushing is meanwhile over so-called spray or spray arms carried out, the above a circulation pump with rinsing liquid, usually water or soapy water supplied and over the pump pressure can be driven in a rotational movement. About the vents the spray arms occurs here the rinsing liquid which is sprayed onto the dishes to be cleaned to clean it.

At the outer end These spray arms are special spray holes provided to the opened Rinse out the cleaner chamber and in this way adding the cleaner to the rinsing liquid.

such Domestic machines have a pumping circuit, wherein a pump draws the water from a so-called swamp and by means of advantageous Lines to the spray arms or the like pumps. Distribute these spray or spray arms the water over the objects to be cleaned, from which this in turn flows to the swamp. In the swamp is usually a sieve to hold back of coarse dirt particles present.

Either for dishwashers as well as washing machines is generally after the actual Cleaning cycle or the cleaning phase provided a rinsing or rinsing phase, around the corresponding objects such as dishes, cutlery or textiles from the residual dirt or the cleaning liquor or the detergent residues continue to be freed or washed. In one or more of these final rinses is by means of new water preferably rinsed the dishes from the drinking water pipe or by means of a rinse aid rinsed. This can, however, residual dirt on the lines or in the swamp itself in the rinse water solve or be carried away by this, so that this pollution on the dishes etc. can adhere. This is called residual dirt or streaks from Consumers perceived negatively.

Also can Clot stains on the glasses accordingly attach, which can be left behind by drying water. To this, too In some cases, very soft rinse water is used, but this is avoided lead to glass corrosion can.

task The invention is therefore a household appliance, in particular Dishwasher or The like, with a pumping circuit for pumping operating fluid, in particular of process water, wherein the pumping circuit at least a pump for pressurizing the working fluid and at least one Distribution unit, in particular a rotatable about an axis spray arm, for Distribute the operating fluid in an operating room and a collecting unit, in particular collecting trough, for collecting the distributed working fluid, to propose with a particularly high quality of the circulated operating fluid or water is guaranteed at least temporarily.

These Task becomes, starting from a household machine the introductory mentioned type, by the characterizing features of the claim 1 solved. By the mentioned in the dependent claims activities are advantageous embodiments and further developments of the invention possible.

Accordingly is a household appliance according to the invention characterized in that the pump circuit at least one control element for commissioning a filter unit for filtering the operating fluid in a filtering phase.

With Help of the advantageous control element, the filter unit be put into operation in order, in a particular phase of operation, to esp. in a final Rinsing or rinsing phase, a relatively high quality the circulatory fluid or of the circulating water to generate. In normal operation or in the cleaning phase can the filter unit except Operation be set, so that a fouling with the the objects Stick as much dirt as possible is avoided to a particularly long life of preferably To achieve designed as a fine filter filter unit.

Advantage oats way becomes the filter unit according to the invention only after the cleaning water or cleaning solution has been sucked off put into operation. Therefor the control element is provided that the pumping circuit in the Operating phase of the filter unit via this one is running.

For example is the control element as a preferably controllable switch and / or Valve formed.

In Advantageously, the filter unit is in a bypass or in arranged a bypass line, in particular by means of the Control set in operation or acted upon with process water becomes.

In a preferred embodiment becomes the flushing pump However, on the suction side with the already existing line system for the cleaning fluid connected to that for the functional cleaning of laundry, Dishes or the like is used. Advantageously the suction line of the flushing pump with the sump of the machine, d. H. the bottom area connected to the machine interior, in which the cleaning liquid while of the operation of the machine.

at many home appliances is a circulation pump for circulating the cleaning fluid used. In a particularly advantageous embodiment of the invention will now this circulation pump at the same time for the filter unit used. In this way, a separate flushing pump can be saved.

Basically the entire flow of operating fluid over the Filter unit are passed. If necessary, only a partial flow the operating fluid for the flush the filter unit is diverted from the pumping circuit.

advantageously, the control element is used as a switching valve for selectively connecting the filter unit connected to the pumping circuit. By such Switching valve, the special filter or flushing process triggered and again be stopped while if necessary, run the other operating functions of the appliance.

An embodiment of the invention is illustrated in the drawing and will be explained with reference to the single figure below. So shows 1 a schematic diagram of an embodiment of the invention.

One Filter and additive transmitter in the switchable hydraulic bypass of a Hydraulic circulation circuit for in particular dishwashers is of particular advantage.

One preferred subject of the invention is a structural unit made of filters and additive generator. This unit is intended to be a filter for dirt particles and alike Delivery of additives (additives) wear. The filter and additive generator is separately switchable in a hydraulic bypass of the circulation circuit of dishwashers used. In this case, there is the circulation circuit in an advantageous manner from circulating pump, Heating, possibly diverter or switching points or the like, spray arm supply line, spray arms, Coarse sieve, fine sieve and dishwasher pump sump. The filter and additive should as possible exclusively in the rinse cycle of the dishwasher be switched on, so he usually exclusively from the largely cleaned liquor in the rinse cycle with previous water change is reached. The connection can z. B. by a special Diverter as a multi-way valve or via a bypass valve located in the switch.

The The task of the filter and Additivgebers is at least the other Filtration of dirt at this time still in the fleet Fine dirt and in an advantageous manner beyond the Aufkonditiones of rinse water with additives, on the one hand the glass corrosion at this point prevent as far as possible and in particular on the other a biocidal and fungicidal action for can carry out the biomass contained in the circulating water. This will make a better Cleaning and better drying with simultaneous ligation Glass corrosion caused by lack of divalent cations.

Of the Filter and additive dispenser is preferably in a separate bypass so constructively executed in the machine that easy changing of the Filters and Additivgebers by the end user is possible.

Claims (21)

Household machine, in particular dishwasher or the like, with a pump circuit for pumping operating fluid, in particular operating water, wherein the pump circuit at least one pump for pressurizing the working fluid and at least one distribution unit, in particular a rotatable about an axis spray arm, for distributing the operating fluid in an operating room and a collecting unit, in particular collecting trough, for collecting the distributed operating fluid, characterized in that the pump circuit comprises at least one control element for starting a filter unit for filtering the operating fluid in a filter phase. Domestic appliance according to claim 1, characterized the filter phase comprises at least one subphase of a rinsing phase of the Household machine is. Household machine according to one of the preceding claims, characterized characterized in that the rinsing phase as a final rinse phase a dishwasher is formed, wherein the operating fluid comprises at least one rinse aid. Household machine according to one of the preceding claims, characterized characterized in that the pumping circuit at least one coarse filter device for coarse filtering of coarse particles of the working fluid having. Household machine according to one of the preceding claims, characterized characterized in that the filter unit as the first filter and the Coarse filter device is designed as a separate second filter. Household machine according to one of the preceding claims, characterized characterized in that the coarse filter device during the entire pumping phase the pump is in operation. Household machine according to one of the preceding claims, characterized characterized in that the collecting unit at least the coarse filter device includes. Household machine according to one of the preceding claims, characterized in that the filter unit is arranged in a bypass of the pumping circuit is, wherein the control element is designed as a distributor element is. Household machine according to one of the preceding claims, characterized characterized in that the filter unit as a fine filter for fine filtering of fine particles and / or components of the working fluid is trained. Household machine according to one of the preceding claims, characterized characterized in that a control device for commissioning an adding device for adding additives to the working fluid in an addition phase. Household machine according to one of the preceding claims, characterized characterized in that the control element for commissioning the Filter unit at the same time as the control device of the adding device is trained. Household machine according to one of the preceding claims, characterized characterized in that the filter phase is the addition phase. Household machine according to one of the preceding claims, characterized characterized in that the filter unit comprises the adding device. Household machine according to one of the preceding claims, characterized in that the additives are used as glass corrosion prevention additives to avoid glass corrosion of household objects or glass are formed. Household machine according to one of the preceding claims, characterized in that the additives are used as limescale avoidance additives to avoid limescale on household objects or glass are formed. Household machine according to one of the preceding claims, characterized in that the additives are used as germicidal avoidance additives designed to avoid bacterial contamination of the operating fluid and / or household items are. Household machine according to one of the preceding claims, characterized in that the germicidal avoidance additives are used as biocides and / or fungicides are formed. Household machine according to one of the preceding claims, characterized characterized in that the filter unit as a replaceable filter unit is trained. Household machine according to one of the preceding claims, characterized characterized in that the filter unit is designed as a disposable filter unit. Household machine according to one of the preceding claims, characterized characterized in that the filter unit as a releasably pluggable filter unit is trained. Household machine according to one of the preceding claims, characterized in that the filter unit has at least one coding and / or identifying device includes.