CN103889298B - It is implemented as the warewasher of washing system of recirculation circuit containing at least one - Google Patents

Abstract

In order to improve throughput, warewasher has the washing system of at least one band recirculation circuit, and it is with at least one Washing spray nozzle (13；13 1) a, washing tube (14；14 1) and one washing pump (11；11‑1).Dirt collecting system (70) is connected with washing system, and dirt excavationg pump (74；74 1) dirt discharge pipe system (72,73 it is connected to；72 1,73 1), in order to discharge the dirt particle being isolatable from from washing system wash fluid out at least partially.Waste water pump (40) connects maybe can be connected to washing tube (14；14 1) in introducing side, and connection maybe can be connected on the releasing side of waste pipe system (41), is collected in washing tube (14 at least partially for pumping out when necessary；14 1) wash fluid in.

Description

It is implemented as the warewasher of washing system of recirculation circuit containing at least one

The present invention relates to the warewasher with washing system recirculation circuit, and especially, the present invention Relating to the industrial appliances washing machine of tableware or vessel, it is with automatic programmed machine or with conveying type device Tool washing machine realizes.

The method that the invention still further relates to operate this warewasher.

The method that present invention is accordingly directed to operation utensil washing machine, and relate to there is at least one with recirculation The warewasher of the washing system that loop realizes itself.This washing system has and carries at least one for washing Wash fluid spray to the nozzle system of the Washing spray nozzle above article to be washed, for collecting at least one Divide the washing tube of the wash fluid of spray and for the wash fluid being collected in washing tube being supplied at least The washing pump of one Washing spray nozzle.Dirt-collecting is also provided in the case of according to the warewasher of the present invention System, it is connected with at least one scrubbing section, and is used for from the spray flowing back into washing tube by means of gravity Eliminating impurities granule in the wash fluid drenched.Further providing for dirt excavationg pump, its connection maybe can be connected to In the introducing side of dirt collecting system, and connect the releasing side that maybe can be connected to dirt discharge pipe system On, for discharging the wash fluid and at least having been enter into dirt collecting system at least partially when necessary It is isolatable from the dirt particle of the wash fluid being collected in washing tube by means of dirt collecting system.

According to the present invention for the warewasher of tableware or vessel be form be box warewasher (also referred to as For batch processing dish-washing machine) automatic programmed machine or conveying type warewasher.

The form of conveying type warewasher is flight type warewasher or shelf conveying type utensil especially Washing machine.Conveying type warewasher is generally used for industrial zone.With article to be washed in washing The box warewasher that period is held in fixed position is contrary, and article are transmitted logical by conveying type warewasher Cross the different disposal district of conveying type warewasher.

Conveying type warewasher is generally of at least one and pre-washes district and at least one main scrubbing section, the latter It is arranged in the downstream pre-washing district, in view of the direction of transfer at article to be washed.Typically at least one Individual rear scrubbing section or pre-rinsing district are arranged in the downstream of main scrubbing section, and at least one is finally arranged in rinsing district In the downstream of rear scrubbing section, from the point of view of in the transmission direction.From the point of view of in the transmission direction, directly it is accommodated in The article kept on conveyer belt or by shelf run in the transmission direction, are typically inserted through intake channel, connect down That comes pre-washes district, main scrubbing section, rear scrubbing section, final rinsing district and dries district's entrance exit portion.

The aforementioned scrubbing section of conveying type warewasher is each assigned washing system, and described washing system has Washing pump and the pipe-line system (washing pipeline system) being connected to washing pump, wash fluid is via described washing pump It is fed into nozzle system or is supplied at least one Washing spray nozzle of nozzle system.It is supplied to nozzle system The wash fluid of at least one Washing spray nozzle is sprayed at the corresponding scrubbing section of conveying type warewasher and is wanted Above the article being washed, described article are transported through by the transporter of conveying type warewasher accordingly Scrubbing section.Each scrubbing section is assigned bucket, Washing spray nozzle the fluid sprayed be accommodated in bucket and/or for The fluid of the nozzle system in relevant treatment district supplies in bucket.

In the case of usual known conveying type warewasher from the prior art, via finally rinsing district Spray spout the final rinse fluid of fresh water form is sprayed above article, described final rinse fluid Being pure form, or can there is further additive it is mixed with, such as rinse aid.At least one The final rinse fluid of part spray transmits the most district by district via the direction of transfer of cascade system with article.

The final rinse fluid of spray is collected in the bucket (rear washing tube) of rear scrubbing section, after it is via belonging to The washing pump of the washing system of scrubbing section is delivered to the spray spout of rear scrubbing section from described bucket and (washs afterwards Nozzle).In rear scrubbing section, wash fluid rinses from article to be washed.It is accumulated in here Fluid flows into the washing tube of at least one main scrubbing section, and at least one main scrubbing section described is arranged in rear scrubbing section Upstream, in view of the direction of transfer at article to be washed.Here, usual convection cell is provided with and washes Wash agent, and by belonging to the pumping system (washing pump) nozzle via main scrubbing section of the washing system of main scrubbing section (Washing spray nozzle) is sprayed above article.If then fluid flows from the washing tube of main scrubbing section and does not has Have if further main scrubbing section is set enter to pre-wash district to pre-wash bucket.Pre-wash the fluid warp in bucket By belonging to the pumping system (pre-washing pump) of the washing system pre-washing district, pre-washing nozzle via pre-wash district Above spray to article, in order to remove thick spot from which.

Conveying type warewasher is typically provided with washing pump, be in the final rinse fluid of final rinsing district spray It is fed into the final pipe-line system rinsing district by means of this.This ensure in particular final rinse fluid Rinse constant volume flow more or less in district eventually.It is envisaged, however, that utilize on-the-spot loine pressure Such as the pressure of fresh water supply to be directed to finally rinse the pipe-line system in district by final rinse fluid. In the case of the latter, can arrange between pipe-line system and the spray spout in final rinsing district bootable Valve, in order to likely interrupt spray spout is supplied final rinse fluid on some time or All Time.

Box warewasher is can manual load and the warewasher of unloading.These include that bell-type utensil is washed Wash machine or front loading formula warewasher.The form of front loading formula warewasher can be undercounter machine Device, platform-type machine or self-support front loading formula warewasher.

It is generally of the process for washing articles with the warewasher that box warewasher form realizes Room.It is generally formed in this process chamber with the washing system that recirculation circuit realizes.Process chamber is generally of cloth Putting washing tube thereunder, wherein fluid can leave process chamber under gravity and flows back to.Washing tube accommodates Wash fluid, it is common that water, can provide detergent in the appropriate case wherein.

Washing system has washing pump, the pipe-line system being connected to washing pump and with at least one Washing spray nozzle Nozzle system.Can be delivered at least by the wash fluid that washing pump will be located in washing tube via pipe-line system One Washing spray nozzle, and sprayed to be washed by this at least one Washing spray nozzle in the process chamber Above article.Then the wash fluid sprayed flow back in washing tube under gravity.

Generally enter by two main process steps with the customary furnishings washing machine that box warewasher realizes Row operation, say, that wash by wash fluid in the very first time, and then with the fresh water being heated Finally rinse, described in the fresh water that is heated there is metering be added to the rinse aid of the inside.Wash fluid contains There is the detergent that water and metering add.In order to be able to implement the two process step, real with box warewasher Existing industrial appliances washing machine is typically provided with two independent fluid systems, and they are completely separate from each other.These are two years old One of individual fluid system is washing-fluid circuit, and it is responsible for washing articles and utilizes making from washing tube Fluid.Another fluid system is final rinse fluid system, and it is generally of for heating fresh water Water heater.

The main task finally rinsed by final rinse fluid is to remove the wash fluid being positioned on article. Additionally, the final rinse fluid flowed there through in washing tube during final rinsing plays the washing made in washing tube The effect of fluid regeneration.

Before the fresh water new for final rinsing supply, from washing tube, generally pump out same amount of scrub stream Body is in on-the-spot waste water network.

The composition of a kind of certain types of industrial appliances washing machine of box warewasher form is covering type Warewasher.It seals by taking off lid for the process chamber of washing articles.Take off lid can be lifted up, in order to place Reason room is loaded, and the most again declines, in order to process article.Covering type warewasher Almost without being provided with inflow platform and outlet platform exceptionally.Flowing into platform is real with precleaning station position in many cases Existing, described precleaning station position is for carrying out prerinse to article, and mode is by being pushed to put by article Before in covering type warewasher in frame, it rinsed and/or remove thereon in a manual fashion Spot.It is typically manual operation by tentatively rinsing the prerinse carried out.For prewashed preliminary rinsing Typically use the fresh water enforcement of the cold of scene or preheating.In some cases, also use other clear Clean chemicals tentatively rinses.Outlet platform is for the purpose being dried with for unloading the shelf of article.

Either still realize warewasher with conveying type warewasher with box warewasher, logical Normal situation is, is subjected to the most preliminary clean operation with manual before article are supplied to warewasher Pre-wash.This is to prevent owing to such as doing prematurely as napkin or the reason of the thick spot of food debris Dirty wash fluid.

The present invention is to realize the mesh of the throughput of the warewasher of type mentioned in introduction 's.Especially, it is intended to describe in detail a kind of method and a kind of warewasher, permissible by means of this Relatively large amount article compared with conventional machine are effectively washed in the unit interval, and without at this being Machine loading and unloading are equipped with other personnel.

Therefore, it is proposed to a kind of utensil washing with at least one washing system realized with recirculation circuit Machine, wherein this at least one washing system have the nozzle system with at least one Washing spray nozzle, washing tube and For the wash fluid being collected in washing tube being supplied to the washing pump of at least one Washing spray nozzle.Dirt is received Collecting system and at least one washing system are connected and are embodied as from the spray flowing back into washing tube by means of gravity Eliminating impurities granule in the wash fluid drenched.Dirt excavationg pump connects maybe can be connected to dirt collecting system In introducing side, and connection maybe can be connected on the releasing side of dirt discharge pipe system, for when necessary Discharge from scrubbing section and have been enter into the wash fluid of dirt collecting system and at least some of separation at least partially Dirt particle from the wash fluid being collected in washing tube by means of dirt collecting system.

According to the present invention, warewasher also has waste water pump, and its connection maybe can be connected to drawing of washing tube Enter on side, and connect and maybe can be connected on the releasing side of waste pipe system, for pump out when necessary to The wash fluid that a few part is collected in washing tube；Described waste water pump can be coordinated to open with dirt excavationg pump Dynamic.

Can achieve the advantage that obviously by the solution according to the present invention: by the one hand Thering is provided dirt collecting system, and provide the pumping out system including waste water pump on the other hand, waste water pump connects Maybe can be connected in the introducing side of washing tube, and connect the releasing side that maybe can be connected to waste pipe system On, it is possible to make that typically manually implements outside scrubbing section to pre-wash operation automatization, and to utensil Washing machine gives this function.By this function performed by warewasher, thus likely save warp The job step carried out by manual prewashed article.So shorten the working time, thus improve utensil The throughput of washing machine.

The test carried out in background range of the present invention shows, be typically only capable to by a people carry out operating normal In the case of rule covering type warewasher, use and likely realize 20% left side according to the solution of the present invention Right ability improves.This is attributable to the fact especially, i.e. integrates the additional machine function pre-washed and makes Likely save have to manually to implement for conventional machine loading pre-wash operation.In routine In the case of warewasher, only it is only possible to realize this when employing more personnel and carrying out operation utensil washing machine Ability improves.

In case of the method according to the invention, during pre-washing the stage, trigger by this way The washing pump of tool washing machine so that the wash fluid being collected in washing tube at least partially is fed at least One Washing spray nozzle, in order to make article be pre-washed.Then, during the dirt discharge stage, with such Mode starts dirt excavationg pump so that be isolatable from wash fluid by means of dirt collecting system at least partially Dirt particle is fed into dirt discharge pipe system, in order to make dirt particle be discharged from machine or scrubbing section. During the main washing stage subsequently, start washing pump by this way so that be collected at least partially Wash fluid in washing tube is fed at least one Washing spray nozzle, in order to washing articles.Finally, at pump During going out the stage, start waste water pump by this way so that be collected at least partially in washing tube washes Wash fluid and be fed into waste pipe system.

In dependent claims 2 to 32, specifically illustrate the favourable of the warewasher according to the present invention send out Exhibition, and in dependent claims 34 to 41, specifically illustrate the Advantageous developments of the method according to the invention.

Therefore, provide in the advantageous development according to the warewasher of the present invention, dirt collecting system There is barrel covering sieve and for collecting the dirt of the dirt particle being isolatable from wash fluid by means of bucket covering sieve Collecting region.Dirt-collecting district is preferably open upwards, but completely encloses at sidepiece.Here dirt is discharged Guard system should connect or be connectable to dirt-collecting district.

Here it is contemplated that bucket covering sieve is disposed in above dirt-collecting district, and on the direction of supply opening It is provided with runoff slope, wherein by this way the dirt-collecting district being open upwards should be arranged in supply opening Lower section so that the dirt particle separated by means of bucket covering sieve can enter dirt-collecting by means of supply opening District.

A barrel covering sieve (preferably realizing with horizontal screen) is on the one hand set, on the other hand dirt collecting system is set, Which ensure that the dirt particle rinsed on the article in washing system and be otherwise directed into washing The dirt particle of fluid can be effectively separated from wash fluid, and is collected with dense in dirt-collecting district Contracting.Owing to dirt-collecting district is completely enclosed (i.e. fluid tight) at sidepiece, therefore it is collected in dirt-collecting Dirt particle in district is enclosed relative to the wash fluid in washing tube, even being therefore likely to be due to It is collected in that the dirt particle in dirt-collecting district is dissolved and the relatively small dirt particle that produces also cannot Return in the wash fluid being accommodated in washing tube.

On the other hand providing in the case of a solution in accordance with the invention, dirt-collecting district is via dirt Thing excavationg pump connects or is connectable to dirt discharge pipe system, wherein can incite somebody to action by means of dirt discharge pipe system The dirt particle being collected in dirt-collecting district is together with the dirt having been enter into dirt collecting system at least partially The wash fluid of collecting region removes in washing system.So can shorten dirt particle in dirt-collecting district The time of staying, and therefore shorten the time of staying in washing system, and the most no longer make dirt likely Dissolve because of the wash fluid recirculation in washing system.

Although the most automatically implementing prerinse therefore, it is possible to use according to the solution of the present invention Realize stable clean result, even if wash time increased, wherein effectively prevent in wash fluid Dirt particle situation that article are made dirty again.

Providing in the preferred implementation according to the warewasher of the present invention, the latter is provided with control dress Putting, it is realized as the most optionally starting washing pump, dirt excavationg pump and waste water pump.Specifically For, if meter control device so that during pre-washing the stage, it is collected at least partially in washing tube Wash fluid is fed at least one Washing spray nozzle by means of washing pump.During the dirt discharge stage, extremely A few part is isolatable from the dirt particle of wash fluid together with the most by means of dirt collecting system The wash fluid entering dirt collecting system is fed into dirt discharge pipe system by means of dirt excavationg pump.? During the main washing stage, the wash fluid being collected in washing tube at least partially is supplied to by means of washing pump To at least one Washing spray nozzle, and during pumping out the stage, it is collected in washing in washing tube at least partially Wash fluid and be fed into waste pipe system by means of waste water pump.Control device preferably be realized as rely on by means of Dirt collecting system is isolatable from the amount of the dirt particle of wash fluid to start dirt excavationg pump.

Here can be such as it is contemplated that also set up the device for detecting the filling level in washing tube, wherein Control device is implemented as rely on detected filling level automatically and the most automatically open Dynamic dirt excavationg pump.

It is being especially susceptible to realization but in unspent embodiment, control device is being implemented as starts dirt and discharges Pump reaches the previously determined good persistent period, and wherein this previously determined good persistent period is depended on detected Filling level.As an alternative or additionally, if such situation it is contemplated that, device is i.e. controlled There is comparator, for detected filling level is previously determined good or confirmable with at least one Threshold value compares, and wherein controls device startup dirt excavationg pump and reaches the previously determined good persistent period, and this depends on In the result compared by means of comparator.

As the alternative to this, it is contemplated that control device and start dirt excavationg pump, until by means of dirt The wash fluid of previously determined good volume or the wash fluid containing the dirt particle separated are pumped out by excavationg pump, The most previously determined good volume depends on detected filling level.Also by this embodiment, it is contemplated that Additionally or alternatively, control device and there is comparator, in order to by detected filling level with At least one previously determined good or confirmable threshold value compares, and wherein controls device and starts dirt and discharge (this depends on borrowing for pump, the wash fluid until previously determined good volume or the wash fluid containing dirt particle Help the result of the comparison that comparator is carried out) it is pumped out.

In this case, provide by the development of the warewasher according to the present invention, discharge to dirt A kind of device of pump distribution, it is used for determining the wash fluid discharged by dirt excavationg pump or containing the dirt separated The volume of the wash fluid of grain.

For detecting the device for example, filling level sensor of the filling level in washing tube, it is arranged in washes Wash in bucket, and be designed to examine continuously or in the predetermined time and/or in the case of scheduled event Survey the current filling level in washing tube.Here it is contemplated that such as provide pressure transducer, it is arranged in washing In Tong, and continuously or the predetermined time or in the case of scheduled event detection be accommodated in washing tube In wash fluid hydrostatic pressure at pressure transducer level, wherein will be examined by means of controlling device The hydrostatic pressure force value measured is converted into corresponding filling liquid place value.

Can also be such as filling level limit switch for detecting the device of the filling level in washing tube, its It is arranged in washing tube and is designed to detect whether the filling level in washing tube falls below the most really The filling level threshold value reserved.In the case of this embodiment, if control device is implemented as so, It is favourable, i.e. when being unsatisfactory for previously determined good filling level threshold value automatically and preferably selectively Automatically dirt excavationg pump is started.

In the advantageous development of last-mentioned embodiment, for detecting the dress of the filling level in washing tube Putting and be made up of at least two filling level limit switch, they are arranged in washing tube and their design side It is to fall below the first previously determined good filling liquid that formula makes them can detect the filling level in washing tube Position threshold value or the second previously determined good filling level threshold value.This in the warewasher according to the present invention In the case of implementation, if being implemented as so by controlling device, it is favourable, i.e. when by means of layout At least two filling level limit switch in washing tube detects and is only unsatisfactory for the first filling level threshold value Shi Qidong dirt excavationg pump reached for the first previously determined good or confirmable persistent period.Additionally, here should Realize by this way controlling device so that when by means of at least two filling liquid being arranged in washing tube Position limit switch detects and is also unsatisfactory for the second filling level threshold in addition to being unsatisfactory for the first filling level threshold value Start dirt excavationg pump during value and reached for the second previously determined good or confirmable persistent period.Here first fill Level threshold corresponds to the level of more than the second filling level threshold value.

As the alternative of last-mentioned embodiment, if such situation it is contemplated that, i.e. Being made up of two filling level limit switches for detecting the device of the filling level in washing tube, wherein this is extremely Few two filling level limit switches are arranged in washing tube, and their design makes them detect Filling level in washing tube is to fall below the first previously determined good filling level threshold value or second previous The filling level threshold value determined.If being implemented as so by controlling device here, it is favourable, i.e. when borrowing Help start dirt when at least two filling level limit switch detects and is only unsatisfactory for the first filling level threshold value Thing excavationg pump, until pumping out the wash fluid of previously determined the first good volume by means of dirt excavationg pump or containing The wash fluid of dirt particle.Additionally, should be implemented as controlling device when by means of at least two filling liquid Position limit switch detects and starts dirt excavationg pump when being also unsatisfactory for the second filling level threshold value, until by means of Dirt excavationg pump pumps out the wash fluid of previously determined the second good volume.

Additionally, according to the solution of the present invention provide from wash fluid discharge dirt particle have efficacious prescriptions Method, therefore compared with the situation of conventional solution, it is possible to realizes making wash fluid have longer validity period Limit.This makes it possible to use wash fluid to clean larger amount of tableware, the most just has to be changed. This decreases the amount of used fresh water, detergent and heat energy especially.

The exemplary of the solution according to the present invention is illustrated in greater detail below in reference to accompanying drawing, Wherein:

Fig. 1 schematically shows the first reality of the warewasher realized with the form of conveying type warewasher Execute scheme；

Fig. 2 schematically shows the second reality of the warewasher realized with the form of conveying type warewasher Execute scheme；

Fig. 3 shows the Hydraulic Power System figure of the washing system of warewasher, and this warewasher is with conveying type device Tool washing machine realizes, and has integration and pre-wash function and dirt device for transferring；

Fig. 4 shows the Hydraulic Power System figure of the washing system of the first embodiment of warewasher, and this utensil is washed Machine of washing realizes with box warewasher, and has integration and pre-wash function and dirt device for transferring；

Fig. 5 a-c shows that the process with the warewasher that integration pre-washes function and dirt device for transferring is suitable Sequence describes；And

Fig. 6 shows the Hydraulic Power System figure of the washing system of the second embodiment of warewasher, and this utensil is washed Machine of washing realizes with box warewasher, and has integration and pre-wash function and dirt device for transferring.

Fig. 1 shows the longitudinal direction of an embodiment of the conveying type warewasher 50 by the teachings of the present invention realization Schematic cross-section.Have according to the conveying type warewasher 50 shown in Fig. 1 and pre-wash district 51 and be arranged in Pre-wash the main scrubbing section 52 in downstream, district 51, such as the sender in article (not shown in figure 1) to be washed From the point of view of on T.In the case of the conveying type warewasher 50 that figure 1 illustrates, wash afterwards or rinse in advance District 53 is arranged in the downstream of main scrubbing section 52, and finally rinsing district 54 washs after being arranged in or pre-rinsing district 53 Downstream, as in view of direction of transfer T.

In the case of the conveying type warewasher 50 illustrated, at least pre-wash district 51 and main scrubbing section 52 The most each realize with washing system 10-1 and washing system 10-2.

The article being directly accommodated on conveyer belt 58 or kept by shelf run on direction of transfer T, pass Intake channel 55, ensuing pre-wash district 51, main scrubbing section 52, rear scrubbing section 53, final rinsing district 54 Exit portion 57 is entered with drying district 56.

The aforementioned processing district 51,52,53,54 of conveying type warewasher 50 is each assigned spray spout 13-1,13-2,13-3,13-4, fluid sprays above article via these nozzles, and article are transmitted by conveyer belt 58 Through corresponding treatment region 51,52,53,54.At least pre-wash district 51, main scrubbing section 52 and rear washing or prebleaching Wash district 53 and be each assigned bucket (washing tube 14-1,14-2,14-3), the wash fluid of spray be accommodated in its neutralize/ Or the wash fluid of spray spout 13-1,13-2,13-3 for the district 51,52,53 that is correlated with is supplied to wherein.

The conveying type warewasher 50 according to first embodiment of the invention shown in Fig. 1 pre-wash district 51, main scrubbing section 52 and rear scrubbing section 53 each have washing system 10-1,10-2,10-3.Each washing system 10-1,10-2,10-3 is by washing pump 11-1,11-2,11-3, the pipe-line system that is connected to washing pump 11-1,11-2,11-3 12-1,12-2,12-3 and the spray spout 13-1,13-2,13-3 composition being connected to pipe-line system 12-1,12-2,12-3.

Being also provided with controlling device 100 (only symbolically illustrating in figure), it is connected with machine part, and It is programmed or is otherwise configured to impact and control washing operation.With conveying type warewasher 50 In the case of the embodiment of the present invention realized, control device (especially) and be used for during washing process starting Washing system 10-1, the corresponding washing pump 11-1 of 10-2,10-3,11-2,11-3 so that at least in some time, wash Wash fluid to be fed into and corresponding washing system via pipe-line system 12-1,12-2,12-3 being connected The spray spout 13-1,13-2,13-3 of the nozzle system that 10-1,10-2,10-3 is connected.Meanwhile, device 100 is controlled It is used for starting in a synchronous manner washing pump 11-1 and dirt excavationg pump 74-1 according to the present invention, in order to improve spy It not to discharge at the machine 50 dirt at the region of entrance.This measure makes it possible to save generally Manually preliminary clean (pre-washing) what machine exterior was implemented, ensure that the most especially such as food debris or The thick spot (till now, manually preliminary cleaning is removed from article) of napkin etc is no The scourability pre-washing district 51 can be negatively affected.

Later phases will be shown in Fig. 1 and 2 with reference to being described in more detail according to the Hydraulic Power System figure of Fig. 3 in the text Conveying type warewasher 50 in the case of distribute to the structure of washing system of at least one scrubbing section 51 And model of action.

In the case of conveying type warewasher 50 shown in FIG, via the final spray rinsing district 54 By the final rinse fluid of fresh water form, (it can have the further chemistry being mixed with and add nozzle 13-4 Add agent, such as rinse aid) spray above article (not shown in figure 1), these nozzles are disposed in transmission Above and below 58.As shown in fig. 1, it is also possible in final rinsing district 54, lateral arrangement is set Spray spout 13-5.

Via cascade system by the final part rinsing the final rinse fluid of spray in district 54 and article Direction of transfer T transmit the most district by district.Via valve 59 and bypass line 60 by remaining final rinse streams Body is conducted directly to pre-wash the pre-washing in barrel 14-1 of district 51.

In finally rinsing district 54, the final rinse fluid of spray is washed after being collected in or rinses district 53 in advance In bucket (rear washing or pre-rinsing tub 14-3), it is therefrom via washing after belonging to or the pre-washing rinsing district 53 The washing pump 11-3 of system 10-3 washs after being delivered to or the spray spout 13-3 in pre-rinsing district 53 (washs afterwards Or pre-rinse nozzle).In rear washing or pre-rinsing district 53, wash fluid is floated from article to be washed Wash off.

The fluid here accumulated flows into the washing tube 14-2 of main scrubbing section 52, is wherein typically provided with washing Agent, and by means of belonging to the washing pump 11-2 of washing system 10-2 of main scrubbing section 52 via belonging to main washing The spray spout 13-2 (Washing spray nozzle) of the washing system 10-2 in district 52 is by above spray to article.

Be washed out fluid flow into from the washing tube 14-2 of main scrubbing section 52 pre-wash district 51 pre-wash bucket 14-1.It is collected in the wash fluid pre-washed in barrel 14-1 by means of belonging to the washing system pre-washing district 51 The washing pump 11-1 of 10-1 is via the spray spout 13-1 (prewashing belonging to the washing system 10-1 pre-washing district 51 Wash nozzle) by above spray to the article pre-washed in district 51, in order to from article, remove thick spot.

In the case of conveying type warewasher 50 shown in FIG, main scrubbing section 52 has a barrel covering sieve 20-2, it is arranged in above main washing tube 14-2.During the operation of conveying type warewasher 50, washing Fluid is sprayed above article via the spray spout 13-2 (Washing spray nozzle) of washing system 10-2.Spray Wash fluid flow back in the washing tube 14-2 of main scrubbing section 52 under gravity, wherein from main scrubbing section 52 In article on the dirt particle that rinses blocked by bucket covering sieve 20-2, condition is that dirt particle covers than bucket The mesh width of sieve 20-2 is big.The mesh width preferably about 1mm to 4mm of bucket covering sieve 20-2.

In the case of being illustrated schematically in the conveying type warewasher 50 of Fig. 1, washing bucket covering sieve 20-2 Need operation disruption, in order to can Manual-cleaning bucket covering sieve 20-2.

In main scrubbing section 52, the portion washes fluid of spray enters via overflow system 61 and pre-washes district 51 Washing tube (pre-washes a barrel 14-1).Also such as the situation of main scrubbing section 52, pre-wash district 51 and be provided with a barrel covering sieve 20-1, it realizes with horizontal screen.This barrel of covering sieve 20-1 is arranged in and pre-washes the washing tube in district 51 (in advance Washing tube 14-1) top, in order to leisure pre-washes to spray and flow back under gravity in district 51 and pre-washes Wash fluid eliminating impurities granule in bucket 14-1.The preferred scope of the mesh width of bucket covering sieve 20-1 is greatly Between about 1mm and 4mm.

Due to as in introduction explanation as dirt concentration in wash fluid in pre-washing district 51 Maximum, because major part dirt here accumulates, therefore the conveying type warewasher 50 shown in Fig. 1 sets Having dirt collecting system 70, it is assigned to pre-wash district 51, and have be arranged in pre-wash in district 51 and The particularly dirt-collecting district 71-1 in pre-washing barrel 14-1.More detailed below in reference to the diagram in Fig. 3 Be described in the dirt collecting system 70 that uses in the case of the conveying type warewasher 50 shown in Fig. 1 Structure and model of action.

In the case of the embodiment of the conveying type warewasher 50 shown in FIG, dirt-collecting district 71 uses Collect the dirt particle being isolatable from wash fluid by means of bucket covering sieve 20-1.Specifically and such as hereafter join As being described in more detail according to the Hydraulic Power System figure in Fig. 3, dirt-collecting district 71-1 realizes with compartment, its cloth Put in pre-washing barrel 14-1, completely enclose at its sidepiece, and be unlimited, therefore in an upward direction There is a possibility that the dirt particle separated by means of bucket covering sieve 20-1 enters the dirt of compartment shape via this opening Thing collecting region 71-1.Owing to dirt-collecting district 71 is completely enclosed at sidepiece, therefore can be effectively prevented The dirt particle being collected in dirt-collecting district 71-1 may return to the receipts that pre-wash in barrel 14-1 and make dirty The situation of collection wash fluid in pre-washing barrel 14-1.

As specifically and being described in more detail referring below to the diagram in Fig. 3, if so, being excellent Choosing, will be arranged in above dirt-collecting district 71-1 by bucket covering sieve 20-1, and have at supply opening 22 The runoff slope of bevel-faced form that travels upwardly, side, the dirt-collecting district 71-1 being wherein open upwards is arranged in Below supply opening 22, the dirt particle therefore separated by means of bucket covering sieve 20-1 can be by means of supply opening 22 enter dirt-collecting district 71-1.

Here it is specifically contemplated that at least realize a barrel covering sieve 20-1 in some regions in the way of funnel, wherein Supply opening 22 realizes in the funnel area 21 of bucket covering sieve 20-1, and preferably at bucket covering sieve 20-1 The center (in this respect especially referring also to the diagram in Fig. 3) of funnel area 21.

The dirt collecting system 70 used in the case of embodiment shown in FIG also has dirt and discharges Guard system, it is connected to dirt-collecting district 71-1, including vertical tube 72-1 and plumbing drain 73-1, and collects Dirt particle in dirt-collecting district 71-1 certainly pre-washes district 51 by means of them and discharges.As directed that Sample, dirt excavationg pump 74-1 is arranged in dirt discharge pipe system 72-1, in 73-1.Dirt excavationg pump 74-1 draws The import entered on side is connected to dirt-collecting via the vertical tube 72-1 belonging to dirt discharge pipe system 72-1,73-1 The lower area of district 71-1.The outlet released on side of dirt excavationg pump 74-1 is outwardly open to belonging to dirt row Go out in the plumbing drain 73-1 of guard system.

In the case of embodiment shown in FIG, plumbing drain 73-1 leads to the dirt-collecting of outside and holds Device 80, it is arranged in and pre-washes beyond district 51, in the upstream of the intake channel 55 of conveying type warewasher 50. This outside dirt collection vessel 80 preferably has sieve and the connector 81 with waste water system.

Due to the wash fluid that can not prevent when spray washing fluid in pre-washing district 51 part from spraying Entering dirt-collecting district 71, therefore dirt excavationg pump 74-1 is more than to separate by means of bucket covering sieve 20-1 Dirt particle is delivered out pre-washing district 51, and is delivered out pre-washing district 51 by portion washes fluid.Will be from Material (dirt particle and the wash fluid) mistake in dirt collection vessel 80 removed in dirt-collecting district 71-1 Sieve, wherein liquid component (wash fluid) can be supplied to waste water system via outflow connector 81, then can dispose Stay the solid (dirt particle) in dirt collection vessel 80.As shown in Figure 2, as the reality shown in Fig. 1 Execute the replacement scheme of scheme, it is also contemplated that pumped out by the dirt particle containing waste water and pre-wash district 51 to Waste disposal In system 82, wherein in position this system 82 can be directly positioned on conveying type warewasher 50 Side or otherwise farther place.The waste disposal system 82 used can be by for separating solid and liquid Constitute outwardly against system and/or crushing system (grind, morcellating system etc.).Also, it is preferred that situation be, will Material (dirt particle and the wash fluid) mistake in waste disposal system 82 removed from dirt-collecting district 71-1 Sieve, wherein liquid component (wash fluid) can be supplied to waste water system via outflow connector 83, then can locate Put the solid (dirt particle) stayed in waste disposal system 82.In the case of the embodiment of Fig. 2, control Device 100 processed is used for starting in a synchronous manner according to the present invention washing pump 11-1 and dirt excavationg pump equally 74-1, in order to improve and particularly discharge at the machine 50 dirt at the region of entrance.

Those exemplary enforcements of the conveying type warewasher 50 according to the present invention in being shown in Fig. 1 and 2 In the case of scheme, the washing system distributing to pre-wash district 51 is additionally provided with waste water pump 40 in each case, Its connection maybe can be connected in the introducing side of washing tube 14-1, and connection maybe can be connected to waste water piping On the releasing side of system 41.The most such as belong to other pump (washing pump 11-1, dirt excavationg pump 74-1) of washing system Situation, can by control device 100 start waste water pump 40, in order to when necessary via waste pipe system 41 will The wash fluid being collected in washing tube 14-1 at least partially pumps out in on-the-spot waste water network.

According to the present invention, it is also provided with the device 42 for determining the dirty degree in wash fluid.By means of figure In the case of the embodiment shown in embodiment in 1 and 2, for determining the device of the dirty degree in wash fluid 42 have at least one turbidity transducer, and it is arranged in waste pipe system 41, and real by this way Existing, in order to determine when wash fluid being pumped out washing tube 14-1 in the wash fluid flowing through waste pipe system 41 Dirty degree.

Describe such as with the conveying type according to Fig. 1 and 2 below in reference to the Hydraulic Power System figure shown in Fig. 3 The structure of the washing system used in the warewasher that warewasher realizes and model of action.But this is washed The system of washing can be also used in the warewasher realized with box warewasher, as by with reference to the figure in Fig. 4 Described in showing.

The dirt collecting system 70 being illustrated schematically in Fig. 3 is arranged in the washing of conveying type warewasher 50 In bucket 14-1.Dirt collecting system 70 has a barrel covering sieve 20-1, and it is preferably placed in washing tube 14-1, Above the liquid level of the wash fluid in being accommodated in washing tube 14-1.Bucket covering sieve 20-1 is for making from gravity Eliminating impurities granule in the wash fluid of the spray in washing tube it is flow back under with.For this reason, it is necessary to For bucket covering sieve 20-1, suitable mesh width is set.

Dirt collecting system 70 also has the dirt-collecting district 71 realized with completely enclosed compartment, and it is upwards It is unlimited on direction.Via the opening in the dirt-collecting district 71 realized with compartment, divide bucket covering sieve 20-1 From dirt particle be fed into dirt-collecting district 71.If supplied for this purpose it is proposed, bucket covering sieve 20-1 has The runoff slope of the bevel-faced form travelled upwardly to the side of opening 22 is then dirt that is preferred, that be wherein open upwards Thing collecting region 71 is arranged in below supply opening 22.As shown in Figure 3, such as it is contemplated that at least in some districts Realizing a barrel covering sieve 20-1 in territory in the way of funnel, wherein supply opening 22 realizes bucket covering sieve 20-1's In funnel area 21, and preferably at the conical region of funnel area 21 of bucket covering sieve 20-1.

If being the most also preferred, i.e. realize dirt-collecting district 71 in upper end in infundibulate mode, in order to have The supply opening 22 of barrel covering sieve 20-1 may be inserted into and be accommodated in wherein.

During the operation of warewasher, wash fluid is sprayed in the scrubbing section 51 distribute to washing system Drenching, wherein the wash fluid of part spray flow back in washing tube 14-1 via bucket covering sieve 20-1.Remaining spray The wash fluid drenched directly flows via the supply opening 22 being arranged in barrel covering sieve 20-1 under gravity Enter dirt-collecting district 71.

If warewasher realizes (seeing Fig. 1 and 2) with conveying type warewasher, then situation is this Sample as already noted during the operation of warewasher, wash fluid is via spray spout 13-1 (pre-washing nozzle) and/or via spray spout 13-2 (Washing spray nozzle) by spray to above article.If Realize warewasher (seeing Fig. 4) with box warewasher on the contrary, and the most pending article keep Static, individually process step and carry out the most successively, then situation is such, washs at utensil During the operation of machine, wash fluid is sprayed to above article via the Washing spray nozzle marked with " 13 " in Fig. 4.

As long as the dirt particle rinsed from article during washing operation they than bucket covering sieve 20-1's Mesh width is big can not be entered the scrub stream being collected in washing tube 14-1 by bucket covering sieve 20-1 prevention Body.More precisely, the dirt particle separated by bucket covering sieve 20-1 is moved to supply by runoff slope Opening 22, and hence into dirt-collecting district 71.Owing to the sidewall in dirt-collecting district 71 is completely enclosed, The most no longer possible make the dirt particle that is collected in dirt-collecting district 71 enter to be collected in washing tube 14-1 Wash fluid.Even if the dirt being collected in dirt-collecting district 71 due to wash fluid falls downward Grain is pulverized further, is still unlikely to make this dirt enter and is collected in the wash fluid in washing tube 14-1 also Therefore the dirt content in wash fluid is increased.

For the most automatically emptying dirt collecting region 71, dirt collecting system 70 also has dirt discharge pipe System.In the case of dirt shown in figure 3 discharges the embodiment of system 70, described dirt discharge pipe System includes the vertical tube 72-1 being connected to the lower area in dirt-collecting district 71.Vertical tube 72-1 is connected to dirt row Go out the import in the introducing side of pump 74-1.The outlet released on side of dirt excavationg pump 74-1 is outwardly open to dirt In water lines 73-1, and therefore in the case of starting dirt excavationg pump 74-1, can be by dirt-collecting district The inclusions of 71 removes in scrubbing section.

Being also provided with waste water pump 40 in the case of being shown in the Hydraulic Power System figure of Fig. 3, its connection maybe can connect In the introducing side of washing tube 14-1, and connection maybe can be connected on the releasing side of waste pipe system 41, For pumping out the wash fluid being collected at least partially in washing tube 14-1 when necessary.

It is shown in the Hydraulic Power System of Fig. 4 schematically to show to be particularly suited for use in and realize with box warewasher Warewasher process chamber in washing system.This warewasher has for controlling at least one The presetting apparatus 100 of washing procedure and can close by door (not shown) or cover (not shown) and intend (do not show, such as tableware, silver dinner set, kettle, pan and/or torr for receiving article to be washed Dish) process chamber.

It is positioned at below process chamber 4 from the washing tube 14 of the fluid of the spray of process chamber 4 for storage.Setting is washed Wash pump 11 for the wash fluid from washing tube 14 is delivered to washing by washing-fluid-pipe-line system 5 Nozzle 13.Washing spray nozzle 13 is directed to the region of article to be washed in process chamber 4, in order to will washing Fluid spray is to above article.The wash fluid of spray flow back in washing tube 14 under gravity.Therefore, Washing tube 14, washing pump 11, washing-fluid-pipe-line system 5 and Washing spray nozzle 13 are formed together with process chamber 4 and wash Wash fluid circuit.

Final rinse-system includes finally rinsing pump 44, for final rinse fluid is passed through final-rinsing-pipe Road system 48 is delivered to final rinse nozzle 49, and the latter is directed to article to be washed in process chamber 4 Region.The final rinse fluid sprayed by final rinse nozzle 49 flows into from process chamber 4 under gravity and washes Wash bucket 14.The releasing side finally rinsing pump 44 is connected to final rinse nozzle by finally-rinsing-pipe-line system 48 49。

Washing spray nozzle 13 and final rinse nozzle 49 can be arranged in article container region top and/or under Side, can also be arranged in the sidepiece in article container region if necessary, and in each case by it Guiding article housing region, here article can being placed in process chamber 4 to wash.

Multiple Washing spray nozzle 13 is preferably set at least one upper wash arm, at least one lower wash Multiple Washing spray nozzle 13 is set on arm, the final rinse arm at least one top arranges multiple final rinsing spray Mouth 49 and multiple final rinse nozzle is set in the final rinse arm at least one bottom.

Before spraying final rinse fluid, by means of waste water pump 40, a certain amount of wash fluid is pumped out washing tube 14, this amount is corresponding to the amount of final rinse fluid to be sprayed, and the introducing side of waste water pump 40 is connected to washing The storage tank of bucket 14.

If washing tube 14 is empty before the warewasher that initial start realizes with box warewasher , then it is first necessary to will be via fresh water pipeline (not shown) or by means of including finally rinsing the final of pump 44 Rinse-system is filled fresh water.

Final rinse fluid can be fresh water or the fresh water being mixed with rinse aid.

Wash fluid contains and is dosed to be contained in washing tube 14 by detergent metering device (not shown) In fluid in detergent.

Warewasher according to the Hydraulic Power System figure shown in Fig. 4 is designed with fresh water even in each case Fitting 46, it may be connected to fresh water supply network.Fresh water connector 46 can supply via fresh water Valve (can by control device 100 control) and be connected to finally float via the air gap and preferably via water heater 45 Wash the introducing side of pump 44.Rinse aid can be dosed in the fresh water in such as water heater 45.

Water heater 45 is provided with at least one liquid level sensor, for by controlling device 100 by fresh water Fresh water valve is correspondingly opened and closed to regulate the liquid level of the fluid in water heater 45 at connector 46.

Also such as the situation of above-mentioned conveying type warewasher, according to the Hydraulic Power System figure shown in Fig. 4 with box The warewasher that warewasher realizes does not has the precleaning station position of outside (to be namely arranged in machine or place Precleaning station position beyond reason room 4) because in the case of shown exemplary, be washed The prerinse of article carry out in process chamber 4.This eliminate by thing in particular according to the present invention Product be enclosed in process chamber 4 before time-consuming (manually) prerinse.

Wash fluid is not made to become during the course in order to make machine can implement prerinse in process chamber 4 itself The dirtiest (so can reduce the quality of washing process subsequently), the washing system shown in Fig. 4 is provided with dirt Collection system 70 and waste water pump, the latter's connection maybe can be connected in the introducing side of washing tube 14, and connect Maybe can be connected on the releasing side of waste pipe system 41, in order to pump out when necessary and be collected at least partially Wash fluid in washing tube 14.

Being also provided with the device 42 for determining the dirty degree in wash fluid, wherein this device 42 preferably has At least one turbidity transducer, it is arranged by this way and realizes, in order to wash when wash fluid being pumped out The dirty degree in the wash fluid flowing through waste pipe system 41 is determined when washing bucket 14.

Structure and the model of action of washing system 70 has been described with reference to the diagram in Fig. 3.For avoiding repeating, Submit to reference to the content described.

Below in reference to the procedural sequences shown in Fig. 5 a to c, washing pump 11 (and/or 11-1), dirt are described The interaction with waste water pump 40 of excavationg pump 74 (and/or 74-1).Specifically, the present invention provides control dress Putting 100, it is realized as optionally starting washing pump 11 and/or 11-1, dirt with such method of synchronization Excavationg pump 74 and/or 74-1 and waste water pump 40 so that

-during pre-washing stage S1, it is collected in the scrub stream in washing tube 14 and/or 14-1 at least partially Body is fed at least one Washing spray nozzle 13 and/or 13-1 by means of washing pump 11 and/or 11-1；And/or

-during dirt discharges stage S2, it is isolatable from washing by means of dirt collecting system 70 at least partially The dirt particle of fluid is fed into dirt discharge pipe system 72,73 by means of dirt excavationg pump 74 and/or 74-1 And/or 72-1,73-1；And/or

-during main washing stage S3, it is collected in the scrub stream in washing tube 14 and/or 14-1 at least partially Body is fed at least one Washing spray nozzle 13 and/or 13-1 by means of washing pump 11 and/or 11-1；And/or

-during pumping out stage S4, it is collected in the wash fluid in washing tube 14 and/or 14-1 at least partially It is fed into waste pipe system 41 by means of waste water pump 40.

Pre-wash stage S1, be collected in washing in washing tube 14 and/or 14-1 the most at least partially Wash fluid and be fed at least one Washing spray nozzle 13 and/or 13-1 by means of washing pump 11 and/or 11-1, with Just wash fluid is sprayed above article to be washed, such as the thick spot of food debris is by from article On rinse, this spot is removed manually pre-washing period in conventional machine on article.

In the case of the procedural sequences schematically shown in fig 5 a, pre-wash stage S1 followed by dirt Thing discharges stage S2.In the case of this dirt discharges stage S2, at least some is by means of dirt-collecting system The dirt particle that system 70 is isolatable from wash fluid is fed into dirt by means of dirt excavationg pump 74 and/or 74-1 Discharge pipe system 72,73 and/or 72-1,73-1.Therefore this constitute by dirt excavationg pump 74 and/or 74-1 real (first) executed pumps out the stage.In this case, at least many separates by means of dirt collecting system 70 Preferably it is pumped to (relative to warewasher) from the dirt particle of wash fluid and is arranged on outside or inside Waste rexeptacle.

In the case of the procedural sequences schematically shown in fig 5 a, do not stand after completing to pre-wash stage S1 I.e. carry out dirt and discharge stage S2.More precisely, there is the time-out continuing preferably approximately 1 to 2 second, in this phase Between, the stage S1 of pre-washing terminate and dirt discharge stage S2 start between washing pump 11 and/or 11-1 and Dirt excavationg pump 74 and/or 74-1 does not starts.This time-out dirt-collecting district to dirt collecting system 70 Dirt in 71 provides and preferably concentrates.Due to washing pump 11 and/or 11-1's and dirt excavationg pump 74 and/ Or the operation of 74-1 is all stopped a period of time of short duration, to discharge it is ensured that discharge stage S2 at dirt Dirt particle be collected in a particularly efficient manner in the dirt-collecting district 71 of dirt collecting system 70.

In the case of the procedural sequences schematically shown in fig 5 a, the dirt continuing about 2 to 3 seconds is discharged Stage S2 is followed by main washing stage S3, during this period by means of washing pump 11 and/or 11-1 by least one Portion collection wash fluid in washing tube 14 and/or 14-1 be applied at least one Washing spray nozzle 13 and/or 13-1, in order to this wash fluid is sprayed above article to be washed.Will be left in article in such a way On spot remove from which.According to dirty degree and/or selected processing routine situation, the main washing stage is usual Continue 20 to 45 seconds.

In the case of the procedural sequences schematically shown in fig 5 a, complete main washing stage S3 followed by Further (second) pumps out stage S4, is collected in the most at least partially in washing tube 14 and/or 14-1 Wash fluid be fed into waste pipe system 41 by means of waste water pump 40.

Particularly in the case of the warewasher realized with box warewasher, this is followed by finally Rinse stage S5, in the case, by means of final rinse-system, final rinse fluid (especially with The fresh water of rinse aid therein may be dosed to) article being washed finally are rinsed, I.e. rinse the wash fluid remaining adhered to article.Final rinse fluid is sprayed during final rinse stage S5 Simultaneously work as the effect making the wash fluid being collected in washing tube 14 and/or 14-1 regenerate.

In the case of the procedural sequences schematically shown in fig 5 a, carry out with final rinse stage S5 simultaneously Or measure stage S6 the most immediately, it is therefore an objective to determine and pump out at the stage S4 of pumping out and be positioned at waste water The dirty degree of the wash fluid in guard system 41.This can such as be carried out by means of turbidimetry.Therefore exist During measuring phases S6, the quality to wash fluid checks.If quality falls below previously determined good Or confirmable limit value, if to have certain (previously determined for the wash fluid i.e. in the test of measuring phases S6 Good or confirmable) muddiness of degree, the most automatically increase and spray during final rinse stage S5 The amount of final rinse fluid, in order to regeneration (dilution) wash fluid fully so that wash fluid is the most again Secondary have predetermined quality.Here it is contemplated that the wash fluid quality determined during relying on measuring phases S6 is come Select the persistent period of final rinse stage S5.

For the single stage, in the case of procedural sequences shown in fig 5 a, it is contemplated that following continues Time:

Pre-wash persistent period t1:4 to 12 second of stage S1, preferably 6 to 10 seconds, even more preferably 8 Second；

Pre-washing persistent period t2:1 to 3 second suspended between stage S1 and dirt discharge stage S2, excellent Elect 1 to 2 second as；

Persistent period t3:1 to 8 second of dirt discharge stage S2, preferably 2 to 5 seconds；

Persistent period t4:10 to 90 second of main washing stage S3, preferably 20 to 50 seconds, or as another Outer it is chosen as 40 to 50 seconds, preferably 42 to 48 seconds；

Pump out persistent period t5:2 to 10 second of stage S4, preferably 3 to 6 seconds；

The persistent period t6 (depending on the dirty degree in wash fluid) of final rinse stage S5: 4 to 10 seconds, excellent Elect 5 to 8 seconds as, even more preferably 7 seconds.

Value given above should be considered merely as being example and not have any restriction effect.Especially for figure For procedural sequences shown in 5b and Fig. 5 c, same or similar value is possible.

Fig. 5 b schematically shows another example of the procedural sequences of the warewasher according to the present invention.With The procedural sequences described with reference to the diagram in Fig. 5 a is contrary, and the procedural sequences shown in Fig. 5 b is pre-washing the stage S1 and dirt are discharged and are not suspended between stage S2.More precisely, according to the process shown in Fig. 5 b In the case of the exemplary of order, during pre-washing stage S1, still start dirt excavationg pump 74 And/or 74-1 and start dirt discharge stage S2.Due to pre-wash stage S1 and dirt discharge stage S2 it Between not do not suspend, and pre-wash stage S1 and dirt is discharged stage S2 and had overlap in time, therefore may be used Correspondingly shorten the total duration of washing cycle.

Fig. 5 c schematically shows another example of the procedural sequences of the warewasher according to the present invention.Tool Body ground, Fig. 5 c shows two continuous print cycles.In the case of the period 1 indicated with " 1. " in fig. 5 c, First carry out pre-washing stage S1, followed by dirt and discharge stage S2 and main washing stage S3 also as shown in figure The situation again in which of the procedural sequences in 5a is discharged and is had temporarily between stage S2 pre-washing stage S1 and dirt Stop.

In the case of alternative shown in fig. 5 c, contrary with the procedural sequences being shown in Fig. 5 a, the One cycle 1. in, the most main washing stage S3 is final rinse stage S5 rather than pumps out stage S4.

In second round (indicating with " 2. " in fig. 5 c) subsequently, carry out pre-washing stage S1, as carried out Main washing stage S3 and pump out stage S4, but after pre-washing stage S1, do not carry out dirt discharge stage S2.

The second round of the procedural sequences in being illustrated schematically in Fig. 5 c 2. in the case of, and finally rinse rank Section S5 carries out simultaneously or measures the most immediately stage S6, determines during this period and is pumping out the phase in stage S4 Between the dirty degree that pumps out and be positioned in the wash fluid in waste pipe system 41.Here at final rinse stage S5 The amount of the final rinse fluid of period spray depends on the wash fluid quality determined during measuring phases S6.

In the case of the embodiment according to the warewasher of the present invention, control device 100 is designed to The most optionally start washing pump 11 (and/or 11-1), dirt excavationg pump 74 (and/or 74-1) and Waste water pump 40, it is therefore possible to realize the procedural sequences described above with reference to the diagram in Fig. 5 a to 5c.Here It is specifically contemplated that once have been carried out pre-washing stage S1, then the recirculation circuit of washing system is interrupted a certain section Time t2, and once have been carried out pre-washing stage S1, or the latest after t2 during this period of time, by dirt Granule is discharged.For this purpose it is proposed, control device 100 is connected to pump 11,74 via control line 100-1,100-2. If the short time interrupt washing pump recirculation, then wash fluid can sieve on vortex.Dirt contained therein The kinetic energy of composition granule thus reduce, therefore they more easily can suck dirt by means of dirt excavationg pump 74 and receive Collection district 71.Here can realize controlling device 100 with a part for machine controling equipment or the part being integrated with.

Controlling device 100 and preferably have microprocessor, this microprocessor is with running thereon and trigger pump The program code of the start by set date of 11,74.Here it is intended to preferred to the sum periodically repeating washing pump 11 The synchronous averaging of dirt excavationg pump 74 realizes controlling device 100, in order to guarantee periodically to discharge dirt particle.

Furthermore, it is possible to design dirt excavationg pump 74, in order to continuously or in the predetermined time and/or in advance In the case of determining event, the dirt particle being collected in dirt-collecting district 71 is received together with being collected in dirt equally Wash fluid in collection district 71 removes.Especially, here it is contemplated that rely on and be collected in dirt-collecting district 71 The amount of dirt particle and start dirt excavationg pump 74 via the control equipment 100 mentioned.

But, certainly it is contemplated that liquid level in the liquid level relied in such as dirt-collecting district 71, washing tube 14 or Other factors and dirt is pumped out dirt-collecting district 71.

If using dirt collecting system 70 in conveying type warewasher 50 (see, e.g. Fig. 1 to 4), Then it can also be envisaged that such as rely on the article that will be washed and passed by the treatment region of conveying type warewasher 50 The transfer rate sent or such as rely on the final rinse streams of time per unit spray in final rinsing district 54 The amount of body starts dirt excavationg pump 74.

It is of course possible to only discharge dirt when each washing cycle, S3 started but it also may at the end of it or Discharge at interlude.Fundamental is to periodically repeat discharging operation, in order to realize consistent high washing Quality.

Describing another washing system below in reference to Hydraulic Power System figure shown in Figure 6, it also shows as in Fig. 4 The situation of the washing system illustrated to meaning property is particularly suited for use in the utensil realized with box warewasher and washes Wash in the process chamber of machine.

Washing system according to Fig. 6 be different from especially above with reference in Fig. 4 diagram describe washing system it Place is, control device 100 is implemented as dependence and is isolatable from wash fluid by means of dirt collecting system 70 The amount of dirt particle starts dirt excavationg pump 74.Specifically, the washing system being illustrated schematically in Fig. 6 Using device 99, it is used for detecting the filling level in washing tube 14.This device 99 is connected to control device 100, wherein control device 100 and be realized as relying on detected filling level and automatically and preferably selecting Selecting property ground starts dirt excavationg pump 74 automatically.Pre-wash the wash fluid liquid level in period washing tube 14 at this In be used as to introduce the instruction of amount of contaminants of washing system.Here with such discovery, i.e. along with pre-washing the phase Between increasing of introducing of dirt, wash fluid backflow in washing tube 14 reduces, because dirty introducing high-load In the case of thing, the sieve surface (that is, bucket covering sieve 20) of dirt collecting system 70 becomes stifled at least in part, and And prevent wash fluid backflow in washing tube 14 the most at least in part.

In order to the most preferably be automatically activated dirt excavationg pump 74, shown in Figure 6 by the amount of contaminants introduced Embodiment in the case of detect the filling level in washing tube 14, wherein rely on detected filling liquid Position, starts dirt excavationg pump 74 by means of controlling device 100.

Here it is contemplated that control device 100 is implemented as starting dirt excavationg pump 74 reach certain persistent period, Wherein this certain persistent period is previously to have had determined that, and depends on detected filling level (and being accordingly dependent on the amount of the dirt being incorporated into washing system).

In order to start dirt excavationg pump 74 as accurately as possible, it is contemplated that make control device 100 have comparator, So that by previously determined good with at least one for the filling liquid place value detected by means of device 99 or can determine that Threshold value compare.Here it is contemplated that control device 100 starts dirt excavationg pump 74 and reaches previously determined good holding The continuous time, wherein this previously determined good persistent period depends on the knot compared by means of comparator enforcement Really.

In the case of the washing system schematically shown in figure 6, also it is implemented as control device 100 selecting Property ground start dirt excavationg pump 74, until by means of dirt excavationg pump 74 by the washing of previously determined good volume Fluid pumps out.This previously determined good volume of wash fluid depends on by means of filling out that device 99 detects Liquid-filling position.It is provided that for this purpose, to dirt excavationg pump 74 distributor 98, true by means of this device The fixed wash fluid discharged in washing system by dirt excavationg pump 74 or the wash fluid containing dirt particle Volume.

Being preferably filling level sensor for detecting the device 99 of the filling level in washing tube 14, it is arranged In washing tube 14, and be designed to continuously or the predetermined or predeterminable time or predetermined or The filling level in washing tube 14 is detected in the case of event that can be predetermined.It is recommended here that be that pressure is such as set Force transducer, it is arranged in washing tube 14, and is designed to detect the washing being accommodated in washing tube 14 Fluid hydrostatic pressure at pressure transducer level.Here should by control device 100 be implemented as by Current filling level in detected hydrostatic pressure determines washing tube 14.But the feelings certainly also having Condition is exactly, for other embodiment of the filling level of wash fluid of being detected and determined in washing tube 14 also It is feasible.

The preferred implementation of the washing system in being illustrated schematically in Fig. 6 provides, is used for detecting The device 99 of the filling level in washing tube 14 is made up of altogether two filling level limit switches, and they are arranged In washing tube 14, and it is designed so that these filling level limit switches can determine that filling out in washing tube 14 Liquid-filling position whether fall below first (on) filling level threshold value, and the filling level in washing tube 14 in addition The most also fall below second (under) filling level.Here it is contemplated that such as when two filling level limit switches Detect and be only unsatisfactory for first (on) filling level threshold value timed unit 100 starts dirt excavationg pump 74 and reach One previously determined good or confirmable persistent period.On the other hand, arrive when two filling level threshold test Also be unsatisfactory for second (under) filling level threshold value time, control device 100 and should start dirt excavationg pump 74 and reach second The previously determined good or confirmable persistent period.

As the alternative to this, it is contemplated that control device 100 is implemented as when two filling levels limit Switch detect and be only unsatisfactory for first (on) filling level threshold value time start dirt excavationg pump 74, until by means of Dirt excavationg pump 74 pumps out the wash fluid of previously determined good volume, and when two filling level limit switches Detect and be also unsatisfactory for second (under) filling level threshold value timed unit 100 starts dirt excavationg pump 74, directly To the wash fluid pumping out previously determined the second good volume by means of dirt excavationg pump 74.

Washing system in being illustrated schematically in Fig. 6 it is contemplated that implementation in provide, if Pre-washing period, the minimum wash fluid liquid level in washing tube 14 keeps being not less than the liquid level shown in Fig. 6 01, then in dirt collecting system 70, discharge such as 0.2 to 0.4 liter wash fluid by means of dirt excavationg pump 74. If minimum wash fluid liquid level drop to liquid level 01 with as value between the liquid level 02 that is also depicted in Fig. 6, then Such as 1.2 to 2.0 liters wash fluid are discharged by means of dirt excavationg pump 74.If minimum wash fluid liquid level drops To less than liquid level 02, then interrupt pre-washing because of dirty Du Taigao, be then discharged out 2.5 to 3.5 liters of wash fluid. The amount of the wash fluid discharged in each case should be selected so that they be enough to clean whole sieve and dirt is received Collecting system.

The present invention is not limited to the embodiment being described in conjunction with the accompanying.

Therefore it is contemplated that the bucket covering sieve 20,20-1 of such as dirt collecting system 70 does not have substantially center cloth The supply opening 22 put, and by means of bucket covering sieve 20, the dirt particle that 20-1 separates is via supply opening 22 Enter dirt-collecting district 71,71-1's.More precisely, it is also possible to be arranged on barrel covering sieve 20,20-1 Neighboring area gap realize supply opening 22.

In principle it can also be envisaged that cover supply opening 22, the mesh that the most this scalping has by means of scalping Width should be preferably greater than the mesh width of bucket covering sieve 20,20-1.Thering is provided such scalping to make can Can be effectively prevented and wherein be different from the silver dinner set article of sewage particulate or other vessel accidentally enter The situation of dirt-collecting district 71,71-1.

Claims (49)

1. a warewasher, it is with automatic programmed machine or with conveying type warewasher (50) Realizing, wherein said warewasher has at least one washing system realized with recirculation circuit, At least one washing system wherein said has: with for wash fluid sprays thing to be washed At least one Washing spray nozzle (13 above product；Nozzle system 13-1)；Sprayed at least partially for collecting The washing tube (14 of the wash fluid drenched；14-1)；With for described washing tube (14 will be collected in；In 14-1) Wash fluid be supplied at least one Washing spray nozzle (13 described；Washing pump (11 13-1)；11-1), its In, it being provided with dirt collecting system (70), it is associated with at least one washing system described and realizes Become to flow back into washing tube (14 from by means of gravity；Eliminating impurities in the wash fluid sprayed in 14-1) Grain, and wherein, it is provided with dirt excavationg pump (74；74-1), it connects at entrance side or is connectable to Described dirt collecting system (70), and connect at outlet side or be connectable to dirt discharge pipe system (72,73；72-1,73-1), have been enter at least the one of described dirt collecting system (70) for discharging when necessary Portion washes fluid and by means of described dirt collecting system (70) from being collected in described washing tube (14；14-1) In wash fluid in separate at least some of dirt particle,

It is characterized in that, described warewasher also has waste water pump (40), and it connects at entrance side or can It is connected to described washing tube (14；14-1), and at outlet side connect or be connectable to waste pipe system (41), it is used for pumping out when necessary being collected in described washing tube (14；At least some of scrub stream in 14-1) Body；Described waste water pump and described dirt excavationg pump are coordinated to start.

Warewasher the most according to claim 1, described utensil detergent is for tableware or vessel Industrial appliances washing machine.

Warewasher the most according to claim 1, wherein said dirt collecting system (70) has bucket Covering sieve (20；20-1) with dirt-collecting district (71), described dirt-collecting district (71) is for collecting by means of institute State barrel covering sieve (20；20-1) the dirt particle separated from described wash fluid, wherein said dirt-collecting District (71) is open upwards, but completely encloses at sidepiece, and wherein said dirt discharge pipe system (72,73；72-1,73-1) connect or be connectable to described dirt-collecting district (71).

Warewasher the most according to claim 3, wherein said bucket covering sieve (20；20-1) arrange In described dirt-collecting district (71) top, and on the direction of supply opening (22), there is runoff slope, its Described in the dirt-collecting district (71) that is open upwards be arranged in described supply opening (22) lower section so that by institute State barrel covering sieve (20；Dirt particle 20-1) separated enters described dirt by means of described supply opening (22) Collecting region (71).

Warewasher the most according to claim 4, at least a part of which in some regions with the side of funnel Formula realizes described bucket covering sieve (20；20-1), and the real presently described bucket of wherein said supply opening (22) covers Lid sieve (20；In described funnel area (21) 20-1).

Warewasher the most according to claim 5, wherein said supply opening (22) is real presently described Bucket covering sieve (20；In the conical region of described funnel area (21) 20-2).

7. according to the warewasher one of claim 4 to 6 Suo Shu, wherein said supply opening (22) be Described bucket covering sieve (20；Center 20-1) realizes.

Warewasher the most according to claim 4, is wherein also provided with scalping, and described scalping is at least Partly cover described supply opening (22), and the mesh width having is more than described bucket covering sieve (20； Mesh width 20-1).

Warewasher the most according to claim 1, wherein said waste pipe system (41) connects or energy Enough it is connected to the waste water network in side of buildings, and described dirt discharge pipe system (72,73；72- 1,73-1) connect or be connectable to outside described washing system realize dirt collection vessel (80) or with The waste disposal system (82) realized outside described warewasher connects.

Warewasher the most according to claim 1, wherein also sets up for determining described scrub stream The device (42) of the dirty degree in body.

11. warewasher according to claim 10, wherein for determining in described wash fluid The device (42) of dirty degree has at least one turbidity transducer, and it is arranged and is implemented as so that when washing described Wash fluid and pump out described washing tube (14；The wash fluid flowing through described waste pipe system (41) is determined time 14-1) In dirty degree.

12. warewasher according to claim 1, wherein it is additionally provided with control device (100), its It is realized as the most optionally starting described washing pump (11；11-1), described dirt excavationg pump (74；74-1) with described waste water pump (40) so that

-during pre-washing the stage, it is collected in described washing tube (14；At least some of scrub stream in 14-1) Body is by means of described washing pump (11；11-1) it is fed into described at least one Washing spray nozzle (13,13-1)；

-during the dirt discharge stage, by means of described dirt excavationg pump (74；74-1), by means of described dirt Thing collection system (70) is isolatable from least some of dirt particle of described wash fluid and is fed into described dirt Thing discharge pipe system (72,73；72-1,73-1)；

-during the main washing stage, it is collected in described washing tube (14；At least some of scrub stream in 14-1) Body is by means of described washing pump (11；11-1) it is fed at least one Washing spray nozzle (13 described；13-1)； And

-during pumping out the stage, it is collected in described washing tube (14；At least some of wash fluid in 14-1) It is fed into described waste pipe system (41) by means of described waste water pump (40).

13. warewasher according to claim 12, wherein described control device (100) is implemented as Described pre-wash the stage during or after pre-washing the stage described in completing, but in the described main washing stage Described dirt excavationg pump (74 is started before beginning；74-1).

14. warewasher according to claim 13, are wherein implemented as described control device (100) Described in delay pattern but starting before the described main washing stage starts after pre-washing the stage described in completing Dirt excavationg pump (74；74-1).

15. according to the warewasher one of claim 12 to 14 Suo Shu, wherein by described control device (100) it is implemented as after completing the described main washing stage starting described waste water pump (40).

16. warewasher according to claim 12, wherein described control device (100) is implemented as Rely on the dirty degree in described wash fluid to start described waste water pump (40).

17. warewasher according to claim 16, the wherein said length pumping out the stage depends on Dirty degree in described wash fluid, described waste water pump (40) described pump out the stage during be by described control Device (100) starts.

18. warewasher according to claim 12, are wherein implemented as described control device (100) Dependence is isolatable from the amount of the dirt particle of described wash fluid and opens by means of described dirt collecting system (70) Dynamic described dirt excavationg pump (74；74-1).

19. warewasher according to claim 18, are wherein additionally provided with for detecting described washing Bucket (14；The device (99) of the filling level in 14-1), is wherein implemented as described control device (100) relying on Detected filling level and be automatically activated described dirt excavationg pump (74；74-1).

20. warewasher according to claim 19, wherein described control device (100) is implemented as Filling level detected by dependence and optionally automatically start described dirt excavationg pump (74；74-1).

21. according to the warewasher described in claim 19 or 20, wherein that described control device (100) is real Ready-made startup described dirt excavationg pump (74；74-1) reach the previously determined good persistent period, wherein said previously The persistent period determined depends on detected filling level.

22. warewasher according to claim 19, wherein said control device (100) have for By the ratio compared with at least one threshold value good with previously determined or confirmable for detected filling level Relatively device, wherein is implemented as starting described dirt excavationg pump (74 by described control device (100)；74-1) reach elder generation Before persistent period of determining, the described previously determined good persistent period depends on by means of described comparator The result of the comparison carried out.

23. warewasher according to claim 19, wherein described control device (100) is implemented as Start described dirt excavationg pump (74；74-1), until by means of described dirt excavationg pump (74；74-1) pump out The wash fluid of previously determined good volume, the wash fluid of wherein said previously determined good volume depends on In detected filling level.

24. have according to the warewasher described in claim 19 or 23, wherein said control device (100) For compared with at least one threshold value good with previously determined or confirmable for detected filling level Comparator, wherein be implemented as starting described dirt excavationg pump (74 by described control device (100)；74- 1), until pumping out the wash fluid of previously determined good volume, the washing of described previously determined good volume Fluid depends on the result of the comparison carried out by means of described comparator.

25. according to the warewasher described in claim 1 or 23, is wherein also provided with arranging with described dirt Go out pump (74；The device (98) 74-1) being connected, is used for determining by described dirt excavationg pump (74；74-1) row The volume of the wash fluid gone out.

26. warewasher according to claim 19, are wherein used for detecting described washing tube (14； The device (99) of the filling level in 14-1) has at least one filling level sensor, described filling level Transducer arrangements is at described washing tube (14；In 14-1), for detecting described filling level continuously.

27. warewasher according to claim 19, are wherein used for detecting described washing tube (14； The device (99) of the filling level in 14-1) has and is arranged in described washing tube (14；Pressure sensing in 14-1) Device, is contained in described washing tube (14 for detection；Wash fluid in 14-1) is at described pressure transducer water The hydrostatic pressure at flat place, and wherein described control device (100) is implemented as by means of detected Hydrostatic pressure determines described washing tube (14；Current filling level in 14-1).

28. warewasher according to claim 19, wherein detect described washing tube (14；14-1) In the device (99) of filling level have and be arranged in described washing tube (14；At least one in 14-1) is filled Liquid level limit switch, is used for detecting described washing tube (14；Whether the filling level in 14-1) falls below elder generation Before the filling level threshold value that determines.

29. warewasher according to claim 28, are wherein implemented as described control device (100) It is automatically activated described dirt excavationg pump (74 when being unsatisfactory for described previously determined good filling level threshold value； 74-1)。

30. warewasher according to claim 29, are wherein implemented as described control device (100) The most automatically start described dirt to discharge when being unsatisfactory for described previously determined good filling level threshold value Pump (74；74-1).

31. according to the warewasher one of claim 28 to 30 Suo Shu, is provided with being arranged in described Washing tube (14；At least two filling level limit switch in 14-1), is used for detecting described filling level and is Fall below the first previously determined good filling level threshold value or the second previously determined good filling level threshold Value, is wherein implemented as described control device (100) being only unsatisfactory for described first filling level threshold when detecting Described dirt excavationg pump (74 is started during value；74-1) reach first previously determined good or confirmable when continuing Between, and be implemented as described control device (100) being also unsatisfactory for described second filling level threshold when detecting Described dirt excavationg pump (74 is started during value；74-1) reach second previously determined good or confirmable when continuing Between.

32. according to the warewasher one of claim 28 to 30 Suo Shu, is provided with being arranged in described Washing tube (14；At least two filling level limit switch in 14-1), is used for detecting described filling level and is Fall below the first previously determined good filling level threshold value or the second previously determined good filling level threshold Value, is wherein implemented as described control device (100) being only unsatisfactory for described first filling level threshold when detecting Described dirt excavationg pump (74 is started during value；74-1), until by means of described dirt excavationg pump (74；74-1) Pump out the wash fluid of previously determined the first good volume, and be implemented as described control device (100) working as Detect and be also unsatisfactory for during described second filling level threshold value starting described dirt excavationg pump (74；74-1), directly To by means of described dirt excavationg pump (74；74-1) pump out the wash fluid of previously determined the second good volume.

33. warewasher according to claim 1, wherein said warewasher is embodied as transmitting Formula warewasher (50), wherein said conveying type warewasher (50) has at least one scrubbing section (51,52) and at least one finally rinse district (54) and for the article that will be washed transport through described in extremely A few scrubbing section (51,52) and the transporter (58) of described final rinsing district (54), described final rinsing district (54) on the direction of transfer (T) of article to be washed, described at least one scrubbing section (51,52) it is connected to Downstream, wherein said washing system and described at least one scrubbing section (51,52) are associated.

34. warewasher according to claim 1, wherein said warewasher is embodied as automatically Programmable machine also has process chamber, and wherein said washing system is associated with described process chamber.

35. warewasher according to claim 34, are wherein also provided with final rinse-system, institute State final rinse-system with at least one finally rinse pump (44) and be arranged in described process chamber final Rinse nozzle system (49), in order to the final rinsing of spray in described process chamber during final rinse stage Fluid.

36. warewasher according to claim 35, wherein said final rinse fluid is fresh Water.

37. according to the warewasher described in claim 35 or 36, wherein relies in described wash fluid Dirty degree controls the amount of the final rinse fluid sprayed.

38. warewasher according to claim 35, wherein during described final rinse stage In described process chamber, the amount of the final rinse fluid of spray depends on during pumping out the stage by means of described useless Water pump (40) is from washing tube (14；The amount of the wash fluid removed in 14-1).

39. for the method operating the warewasher according to one of claims 1 to 38, wherein said side Method has a following methods step:

I) during pre-washing the stage, described washing pump (11 is started；11-1) so that be collected in described washing Bucket (14；At least some of wash fluid in 14-1) is fed at least one Washing spray nozzle (13 described； 13-1), for article to be washed are pre-washed；

Ii) during the dirt discharge stage, described dirt excavationg pump (74 is started；74-1) so that have been enter into institute State at least some of wash fluid of dirt collecting system (70) and be isolatable from by means of described dirt-collecting system System (70) is collected in described washing tube (14；At least some of dirt particle of the wash fluid in 14-1) is supplied It is given to described dirt discharge pipe system (72,73；72-1,73-1), for dirt particle being discharged described utensil The treatment region of washing machine or process chamber；

Iii) during the main washing stage, described washing pump (11 is started；11-1) so that wash described in being collected in Wash bucket (14；At least some of wash fluid in 14-1) is fed at least one Washing spray nozzle described (13；13-1), for article to be washed are carried out main washing；And

Iv) during pumping out the stage, described waste water pump (40) is started so that be collected in described washing tube (14； At least some of wash fluid in 14-1) is fed into described waste pipe system (41).

40. according to the method described in claim 39, wherein completes described method step i) afterwards but described Method step iii) start to implement described method step ii before).

41. methods according to claim 40, wherein with delay pattern after completing described method step i) But at described method step iii) start to implement described method step ii before).

42. according to the method one of claim 39 to 41 Suo Shu, wherein completes described method step iii) after Implement described method step iv).

43. according to the method described in claim 39, wherein at method step iv) in, it is being supplied to described giving up The described wash fluid of water pipe system (41) determines the dirty degree in described wash fluid.

44. methods according to claim 43, wherein said method is at method step iv) after also have with Lower method step:

V) during final rinse stage, pump (44) is finally rinsed by means of at least one by final rinse fluid It is supplied to final rinse nozzle system (49), for article to be washed finally are rinsed.

45. according to the method described in claim 39, wherein detects described washing tube (14；Filling out in 14-1) Liquid-filling position, and at described method step ii) in, the filling level detected by dependence is automatically activated institute State dirt excavationg pump (74；74-1).

46. methods according to claim 45, wherein at described method step ii) in, rely on and detected To filling level the most automatically start described dirt excavationg pump (74；74-1).

47. according to the method described in claim 45 or 46, wherein at described method step ii) in, start institute State dirt excavationg pump (74；74-1) reach the previously determined good persistent period, wherein said previously determined good holding The continuous time depends on detected filling level.

48. methods according to claim 47, wherein by detected filling level and at least one Previously determined good or confirmable threshold value compares, and wherein at described method step ii) in, rely on Described result of the comparison is by described dirt excavationg pump (74；74-1) startup reaches the previously determined good persistent period.

49. according to the method described in claim 45 or 46, wherein determines at described method step ii) in institute By means of described dirt excavationg pump (74 during stating the dirt discharge stage；The body of wash fluid 74-1) discharged Long-pending, and wherein at described method step ii) in, start described dirt excavationg pump (74；74-1), until borrowing Help described dirt excavationg pump (74；74-1) pump out the wash fluid of previously determined good volume, wherein said The wash fluid of previously determined good volume depends on detected filling level.