CN101940460B - Tableware washer - Google Patents

Abstract

The invention relates to a tableware washer having a storage part for storing washings, and a washings jetting mechanism, the jetting mechanism jets the washings stored in the storage part to objects to be washed in a washing tank to clean the objects. The washer comprises a turbidity detection part, which is located at a position higher than a water level of residual water of the washings stored in the storage part, and used for detecting the turbidity of the washings. The washer further comprises a control part for adjusting a detected value of turbidity to be a reference value before a period of cleaning via action of the washings jetting mechanism, and then, setting a cleaning condition according to the turbidity of the washings. Thereby, dreggy degree of the objects to be cleaned can be accurately detected for long time.

Description

Dish cleaning machine

Technical field

The present invention relates to a kind of dish cleaning machine of cleaning tableware.

Background technology

There is a kind of dish cleaning machine that possesses the optical sensor of the turbidity that is used to detect the washings that when cleaning tableware, use.The transmission of light sensors washings is used as the turbidity of washings.As this dish cleaning machine, the dish cleaning machine that japanese kokai publication hei 6-22896 communique (patent documentation 1) is put down in writing for example is described.

The dish cleaning machine of patent documentation 1 for example utilizes the material of light transmission to form at least a portion wall of suction hose, and this suction hose is arranged between the ponding portion and the suction side of nozzle with pump that is provided with in the bottom of sink.In addition, be provided with light-emitting component and the photo detector that the transmission that is used to detect the inner liquid of suction hose changes.Thus, constitute optical sensor.According to the variation of the light income of photo detector, come cleaning, rinsing, draining and dry step are controlled.

Yet the dish cleaning machine of patent documentation 1 exists in the inside of sink under the situation of residual water, can automatically not proofread and correct the characteristic deviation of light-emitting component and photo detector.Make the normalized current of storage in advance flow through light-emitting component.When using dish cleaning machine at first, the wall that is formed by translucent material of optical sensor does not adhere to dirt, is clean therefore.Therefore, even normalized current is flow through under the situation of light-emitting component, in the dirty degree detection of washings, can not produce very big difference yet.Yet,, on wall, adhere to the dirt that washings comprise along with the access times of dish cleaning machine increase.Thus, the transmission of wall descends.In this case, if make normalized current flow through light-emitting component, then false judgment is that dirty degree is bigger because transmission descends when the detection dirt is spent.

Summary of the invention

The present invention provides a kind of dish cleaning machine that does not make the detection accuracy reduction of turbidity detection portion and can suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.Dish cleaning machine involved in the present invention cleans through jet cleaning water and is cleaned thing, and this dish cleaning machine possesses: sink, and it holds and is cleaned thing, has the portion that accumulates that accumulates washings; And the washings injection equipment, its thing that is cleaned in being contained in sink sprays the washings accumulate in the portion of accumulating and cleans and be cleaned thing.Dish cleaning machine involved in the present invention also possesses turbidity detection portion; This turbidity detection portion be set at sink inner, than the high position of water level of the residual water of accumulating the washings that institute of portion can accumulate, the turbidity of the washings of detection sink inside.Dish cleaning machine involved in the present invention also possesses control part; This control part will be adjusted into a reference value by the detected value of turbidity detection portion before during the washings injection equipment being moved clean the cleaning that is cleaned thing, afterwards according to during cleaning, setting the cleaning condition that is cleaned thing by the turbidity of the detected washings of turbidity detection portion.

Thus, pinpoint accuracy ground detects the dirty degree that is cleaned thing for a long time.In addition, owing to can detect the dirty degree that is cleaned thing in pinpoint accuracy ground, therefore can suitably clean.

Description of drawings

Fig. 1 is the front view of the structure of the related dish cleaning machine of expression embodiment of the present invention.

Fig. 2 is the side view of the structure of the related dish cleaning machine of expression embodiment of the present invention.

Fig. 3 is the structure chart that is used to explain a plurality of streams that are connected with the hydroseparator structure of Fig. 2.

Fig. 4 is the flow chart of the action summary of the related dish cleaning machine of expression embodiment of the present invention.

Fig. 5 is the assembling stereogram of the turbidity detection portion of Fig. 1.

Fig. 6 is the sectional view of the turbidity detection portion of Fig. 1.

Fig. 7 is the sequential chart of expression from the variation of the magnitude of voltage of the detection signal of optical sensor output.

Fig. 8 is the block diagram of structure of the control system of the related dish cleaning machine of expression embodiment of the present invention.

Fig. 9 is the circuit diagram of the detailed structure of expression optical sensor.

Figure 10 is the sequential chart of the pulse signal that provides from control part.

Figure 11 is the flow chart that output adjustment that expression is undertaken by control part is handled.

Sequential chart when Figure 12 is the output adjustment of being undertaken by control part.

Figure 13 is the curve map of the relation between the voltage of turn-on time and detection signal of indicating impulse signal.

Figure 14 is the curve map of the relation between the voltage of turbidity and detection signal of expression washings.

Figure 15 is the flow chart of the control action of expression control part.

Figure 16 is the flow chart of the control action of expression control part.

Figure 17 is the flow chart of the control action of expression control part.

Figure 18 is the flow chart of the control action of expression control part.

Figure 19 is the flow chart of the control action of expression control part.

The specific embodiment

Below, with reference to accompanying drawing the dish cleaning machine that embodiment of the present invention is related is described.In the explanation below, will be cleaned the liquid that uses in cleaning and the rinsing of thing at tableware etc. and be called washings.

(1) structure of dish cleaning machine

Fig. 1 and Fig. 2 are the front view and the side views of the structure of the related dish cleaning machine of expression embodiment of the present invention.In the front view of Fig. 1, cut dish cleaning machine 1 the front a part and illustrate.In addition, in the side view of Fig. 2 the perspective dish cleaning machine 1 inside and illustrate.In addition, all around in this embodiment, all around when being meant from top view dish cleaning machine 1 up and down, up and down.

As depicted in figs. 1 and 2, dish cleaning machine 1 possesses housing 1a.That kind as shown in Figure 2 is provided with the door 16 that can open and close on the front surface of housing 1a.On the part of door 16, form fenestrate 16a (shown in Fig. 2).Be provided with in the inside of housing 1a and be used for the sink 2 that cleaning tableware etc. is cleaned thing 10.

Upper strata at sink 2 is provided with upper strata tableware basket 8 with the mode that can move up in front and back.Upper strata tableware basket 8 has the left accommodation section 8a and the right accommodation section 8b that is located at the another side side of sink 2 of a side being located at sink 2.Left side accommodation section 8a is located at the position that is lower than right accommodation section 8b.

Lower floor at sink 2 is provided with lower floor's tableware basket 9 with the mode that can move up in front and back.Lower floor's tableware basket 9 has the left accommodation section 9a and the right accommodation section 9b that is located at the another side side of sink 2 of a side being located at sink 2.Left side accommodation section 9a is located at identical height place with right accommodation section 9b.

In the left accommodation section 9a of the left accommodation section 8a of upper strata tableware basket 8 and right accommodation section 8b and lower floor's tableware basket 9 and right accommodation section 9b, hold the various things 10 that are cleaned.

Dispose roughly criss-cross fixedly washer jet 5 at the back side of sink 2.Fixedly washer jet 5 has 5a of longitudinal nozzle portion that extends along the vertical direction and the transverse jet mouth 5b that extends along transverse direction in the substantial middle portion of the 5a of this longitudinal nozzle portion.The upper end of the 5a of longitudinal nozzle portion is crooked along transverse direction towards the another side of sink 2, thereby forms bend 5c.On bend 5c, be formed with a plurality of liquid ejection outlet 20a.

In addition, directly over the upper end of the 5a of longitudinal nozzle portion, locate to be provided with turbidity detection portion 60.Record and narrate turbidity detection portion 60 after a while in detail.

At a side of sink 2, aqueduct 6 is installed with the mode of forwards extending from the fixing transverse jet mouth 5b of washer jet 5.Front end at aqueduct 6 rotates washer jet 7 being equipped with around the mode of vertical axis rotation.Rotation washer jet 7 has the blade part that extends to a direction and rightabout thereof from pivot, is formed with a plurality of liquid ejection outlets (not shown) at the upper surface of these blade parts.Rotation washer jet 7 is configured in the below of the left accommodation section 8a of upper strata tableware basket 8.In addition, on the transverse jet mouth 5b of the another side of sink 2 side, be formed with a plurality of liquid ejection outlet 20b.

Bottom at sink 2 rotates washer jet 3,4 being equipped with around the mode of vertical axis rotation.Each rotates washer jet 3,4 and rotation washer jet 7 likewise has from the blade part of pivot to a direction and rightabout extension thereof.Upper surface at these blade parts is formed with a plurality of liquid ejection outlets (not shown).Rotation washer jet 3 is configured in the below of the left accommodation section 9a of lower floor's tableware basket 9.Rotation washer jet 4 is configured in the below of the right accommodation section 9b of lower floor's tableware basket 9.In addition, by the rotation washer jet 3,4,7, fixedly washer jet 5 constitutes the washings injection equipment.

As shown in Figure 2, the front face side of the sink 2 below lower floor's tableware basket 9 is formed with the portion of accumulating 12, and this accumulates portion 12 and temporarily accumulates and be used to clean or washings that rinsing is used when being cleaned thing 10.Near the portion of accumulating 12, dispose the heater 14 that is used to heat the washings that accumulated and is used for the air of heated scrub groove 2 inside as the heating part.In addition, be provided with the temperature sensor 17 that the temperature to the inner air of the temperature of the washings that accumulated and sink 2 detects at the portion of accumulating 12 places as temperature detecting part.

Be formed with discharge outlet 12a in the bottom of the portion of accumulating 12.Directly over discharge outlet 12a, be equipped with and be used to collect from being cleaned the leftovers filter 13 of the leftovers that thing 10 removes with mode that can installation and removal.In addition, in this embodiment, leftovers is meant through cleaning or rinsing and solid matter from be cleaned the dirt that thing 10 removes.

Below discharge outlet 12a, be formed with washings and import and export the G of portion.Washings import and export the G of portion and are connected with an end of feed pipe 31.Feed pipe 31 extends to the outside of housing 1a, and the other end is connected with not shown running water tube.In the inside of housing 1a, on feed pipe 31, be provided with feed water valve 31a.Come to import and export the G of portion importing running water as washings through opening feed water valve 31a to washings.

In addition, pump 11 imports and exports the G of portion via pipe arrangement 11a with washings and is connected.Thus, the inner space of pump 11 is connected with the inner space that washings import and export G of portion and feed pipe 31.The drainpipe 32 and hydroseparator structure 15 of the outside that extends to housing 1a are installed on pump 11.In addition, in this embodiment, use reversible rotary-type pump as pump 11.

Be provided with drier 72 in the side of pump 11.Drier 72 for example comprises fan etc., through not shown gas introduction tube from the back side of sink 2 the internal feed gas to sink 2.Thus, after in the drying steps that is cleaned thing 10 stated, produce air-flow in the inner space of sink 2.

On above-mentioned hydroseparator structure 15, be connected with a plurality of streams.These a plurality of streams are described.Fig. 3 is the structure chart that is used to explain a plurality of streams that are connected with the hydroseparator structure 15 of Fig. 2.

Shown in chain-dotted line among Fig. 3, on hydroseparator structure 15, be connected with the first, second, third and the 4th stream Ra, Rb, Rc, Rd.The first stream Ra connects hydroseparator structure 15 and rotation washer jet 3.This first stream Ra is used for the washings in rotation washer jet 3 supply hydroseparator structures 15.

The second stream Rb connects hydroseparator structure 15 and rotation washer jet 4.This second stream Rb is used for the washings in rotation washer jet 4 supply hydroseparator structures 15.

The 3rd stream Rc is formed on the fixedly inside of washer jet 5.Specifically, the 3rd stream Rc passes through the fixedly 5a of the longitudinal nozzle portion connection hydroseparator structure 15 and turbidity detection portion 60 of washer jet 5.In addition, the 3rd stream Rc is connected hydroseparator structure 15 and a plurality of liquid ejection outlet 20a through the fixing 5a of longitudinal nozzle portion of washer jet 5 with bend 5c.And the transverse jet mouth 5b of the another side side of longitudinal nozzle portion 5a and the sink 2 of the 3rd stream Rc through fixing washer jet 5 is connected hydroseparator structure 15 and a plurality of liquid ejection outlet 20b.The 3rd stream Rc is used for supplying with the inner washings of hydroseparator structure 15 to turbidity detection portion 60 and fixedly a plurality of liquid ejection outlet 20a, the 20b of washer jet 5.

The 4th stream Rd also is formed on the fixedly inside of washer jet 5.Specifically, the transverse jet mouth 5b and the aqueduct 6 of a side of the longitudinal nozzle portion 5a of the 4th stream Rd through fixing washer jet 5, sink 2 connect hydroseparator structures 15 and rotate washer jets 7.The 4th stream Rd is used for supplying with to rotation washer jet 7 washings of hydroseparator structure 15 inside.

In dish cleaning machine 1, under the situation of cleaning that is cleaned thing 10 or rinsing, at first come to import and export the G of portion and discharge outlet 12a through washings and to the internal feed washings (running water) of the portion of accumulating 12 from feed pipe 31 through opening feed water valve 31a.

After the washings of ormal weight had been accumulated in the inside of the portion of accumulating 12, the motor of pump 11 rotated to positive direction.Thus, accumulate the washings that portion 12 accumulated and sucked, be pressed to first～the 4th stream Ra～Rd via hydroseparator structure 15 by pump 11.In addition, hydroseparator structure 15 is constituted to first～the 4th stream Ra～Rd supply with washings successively.Perhaps hydroseparator structure 15 is constituted to first～the 4th stream Ra～Rd and supply with washings simultaneously.

Through supplying with washings to the first stream Ra, to the left accommodation section 9a that is contained in lower floor's tableware basket 9, be cleaned thing 10 jet cleaning water from the liquid ejection outlet of rotation washer jet 3.Through supplying with washings to the second stream Rb, to the right accommodation section 9b that is contained in lower floor's tableware basket 9, be cleaned thing 10 jet cleaning water from the liquid ejection outlet of rotation washer jet 4.Through supplying with washings to the 4th stream Rd, to the left accommodation section 8a that is contained in upper strata tableware basket 8, be cleaned thing 10 jet cleaning water from the liquid ejection outlet of rotation washer jet 7.

From rotation washer jet 3,4,7 jet cleaning water the time, rotation washer jet 3,4,7 rotates around vertical axis through the reaction force that the injection along with washings acts on blade part.Thus, recur variation from rotation washer jet 4 to the injection direction that is cleaned thing 10 jet cleaning water.

Through supplying with washings to the 3rd stream Rc, to the right accommodation section 8b that is contained in upper strata tableware basket 8, be cleaned thing 10 jet cleaning water from the liquid ejection outlet 20a of fixing washer jet 5,20b.In addition, supply with washings, detect the turbidity of washings to turbidity detection portion 60.Record and narrate the detection of the turbidity of washings after a while.

In above-mentioned dish cleaning machine 1, when cleaning that is cleaned thing 10 or rinsing end, the motor of pump 11 is to contrary direction rotation.Thus, accumulate in the washings in the portion of accumulating 12 and remain in washings in the hydroseparator structure 15 and import and export the G of portion through discharge outlet 12a and washings and sucked, be discharged to the outside of sink 2 through drainpipe 32 by pump 11.

(2) the action summary of dish cleaning machine

The action summary of dish cleaning machine 1 is described.Fig. 4 is the flow chart of the action summary of expression dish cleaning machine 1.

As shown in Figure 4, at first discharge the washings that remain in sink 2 inside, come from internal feed running water (the step S1: draining/water supply step) of feed pipe 31 through opening feed water valve 31a to the portion of accumulating 12.

Then, begin to carry out as the cleaning step one of during cleaning.Through dissolving detergent in the running water that is fed into sink 2 inside, can access washings.These washings through pump 11 dextrorotation then be pressed to first～the 4th stream Ra～Rd.Thus, from the rotation washer jet 3,4,7 and fixedly washer jet 5 be cleaned cleaning (the step S2: cleaning step) of thing 10 to being cleaned thing 10 jet cleaning water.

In this case, be injected into the washings that are cleaned thing 10 and accumulate portion 12, accumulate in once more in the portion of accumulating 12 along the inflows such as wall of sink 2.The washings that accumulate in the portion of accumulating 12 are pressed to first～the 4th stream Ra～Rd through pump 11 once more, spray to being cleaned thing 10 from each nozzle 3,4,5,7.Like this, when cleaning was cleaned thing 10, washings were in the inner loop of sink 2.

When the cleaning that is cleaned thing 10 finished, the used washings of institute were discharged through drainpipe 32 when utilizing the contrary rotation of pump 11 that cleaning is cleaned thing 10.Afterwards, come to supply with running water (step S3: draining/water supply step) once more through opening feed water valve 31a to the portion that accumulates 12 of sink 2.

Then, begin to carry out as the rinse step one of during cleaning.Running water to the internal feed of sink 2 is pressed to first～the 4th stream Ra～Rd as washings through pump 11.Thus, from each nozzle 3,4,5,7 to being cleaned thing 10 jet cleaning water, thereby be cleaned rinsing (the step S4: rinse step) of thing 10.

In this embodiment, the number of times of the rinse step of step S4 is according to the difference by the turbidity of turbidity detection portion 60 detected washings.Record and narrate the relation between the number of times of turbidity and rinse step of washings after a while.

When the rinsing that is cleaned thing 10 finished, employed washings were discharged through drainpipe 32 when utilizing pump 11 with rinsing.Afterwards, come to supply with running water (step S5: draining/water supply step) once more through opening feed water valve 31a to the portion that accumulates 12 of sink 2.

Then, through making heater 14 carry out work with accumulating in the temperature that the portion's of accumulating 12 inner running water are heated to regulation.Afterwards, the running water after the heating is pressed to first～the 4th stream Ra～Rd as washings through pump 11.Thus, spray the washings that are heated to set point of temperature to being cleaned thing 10, be cleaned heating rinsing (the step S6: the heating rinse step) of thing 10 from each nozzle 3,4,5,7.

In this case, utilize heat energy enough to be cleaned the degerming of thing 10, and the drying efficiency that is cleaned thing 10 in the drying steps after can improving.When the heating rinsing that is cleaned thing 10 finished, employed washings were discharged (step S7: drain step) through drainpipe 32 when utilizing pump 11 to heat rinsing.

At last, stop the action of pump 11, drier 72 moves.Drier 72 makes the inner space of sink 2 produce air-flow.Thus, be heated to the inner loop of the air of set point of temperature by heater 14 at sink 2.Utilize the air after heating to carry out drying (step S8: drying steps) to being cleaned thing 10.The drying that is cleaned thing 10 is accomplished a series of release in the dish cleaning machine 1 thus.In addition, though do not mention in the foregoing, in fact in the cleaning step of step S2, also washings are heated to the temperature of regulation through heater 14.

(3) details of turbidity detection portion

Specify turbidity detection portion 60.Fig. 5 is the assembling stereogram of the turbidity detection portion 60 of Fig. 1, and Fig. 6 is the sectional view of the turbidity detection portion 60 of Fig. 1.

Like Fig. 5 and shown in Figure 6, turbidity detection portion 60 mainly detects nozzle 5x by end cover 610, seal 620, sensor housing 630, sensor support housing 640, overhead guard 650, optical sensor 64 and turbidity and constitutes.The part of the end face in the sink 2 of 610 pie graphs 1 is covered at the end.That is, to form its part outstanding downwards for the end face of sink 2.The central portion of cover 610 is formed with peristome 611 end of at.In addition, on end cover 610, be formed with two screwed holes 612 near peristome 611 ground.

As the material of the back side, side, bottom surface and the end face of sink 2, for example use polypropylene (PP) resin with light-proofness.In addition, the material as the part beyond the 16a of window portion that removes door 16 of the front surface that constitutes sink 2 also can use polypropylene (PP) resin.With respect to this,, use polymethylpentene (PMP) resin with light transmission as the material of the 16a of window portion of door 16.Thus, the user of dish cleaning machine 1 can see the inside of sink 2 from the 16a of window portion of door 16.

When assembling turbidity detection portion 60, the inward flange of the peristome 611 of cover 610 is installed seal 620 end of along.Under this state, having roughly, the sensor housing 630 of ship shape shape is embedded in the peristome 611 of end cover 610 across seal 620.As the material of sensor housing 630, for example use polymethylpentene (PMP) resin.In this case, sensor housing 630 has light transmission.

Central portion at sensor housing 630 is formed with the spatial accommodation 630S that is used to hold sensor support housing 640.In addition, on sensor housing 630, be formed with two through holes 639 near spatial accommodation 630S ground.

Be embedded under the state in the end cover 610 at sensor housing 630, two through holes 639 through sensor housing 630 are installed to screw N in two screwed holes 612 of end cover 610.Thus, sensor housing 630 is fixed in the end cover 610 reliably.In addition, guarantee the watertightness between sensor housing 630 and the end cover 610 through seal 620.As shown in Figure 6, the bottom surface central authorities of the sensor housing 630 that forms spatial accommodation 630S be formed with to above the cross section of depression be the concavity portion 631 of rectangle.

Light-emitting component 64a that printed circuit board (PCB) 64P is installed on sensor support housing 640, constitutes by light emitting diode and the photo detector 64b that constitutes by photodiode.Constitute optical sensor 64 by printed circuit board (PCB) 64P, light-emitting component 64a and photo detector 64b.In this embodiment, use the optical sensor of transmission-type as optical sensor 64.The terminal of light-emitting component 64a and photo detector 64b is connected with printed circuit board (PCB) 64P.

The sensor support housing 640 that optical sensor 64 is installed is accommodated among the spatial accommodation 630S of sensor housing 630.Under this state, by the light-emitting component 64a of sensor support housing 640 supporting and photo detector 64b across the concavity portion 631 of sensor housing 630 and mutually opposed.

Mode with the upper end of pushing down sensor support housing 640 is installed overhead guard 650.Thus, sensor support housing 640 is positioned, and sensor support housing 640 is fixed in the sensor housing 630 simultaneously.Thus, light-emitting component 64a and photo detector 64b also are positioned.

The upper surface of overhead guard 650 connects with the end face of the housing 1a that covers sink 2.Thus, each structure member of turbidity detection portion 60 is fixing by reliably.

Detect nozzle 5x as the upper end of the fixedly washer jet 5 of Fig. 1～shown in Figure 3 is as shown in Figure 6, being equipped with towards turbidity detection portion 60 and along the turbidity that vertical is extended.The inner space of turbidity detection nozzle 5x constitutes the part of the 3rd stream Rc.

The front end that turbidity detects nozzle 5x is oriented to relative with the concavity portion 631 of sensor housing 630.When the 3rd stream Rc supplies with washings, detect nozzle 5x from turbidity and spray washings continuously to the top.The washings that are ejected into concavity portion 631 flow out successively, but owing to spray washings continuously, the inside that therefore remains on concavity portion 631 is filled with the state of washings.That is to say, be filled in the inside of concavity portion 631 from the washings of turbidity detection nozzle 5x ejection successively with replacing.

Under this state, drive optical sensor 64.As stated, sensor housing 630 has light transmission.Thereby, the light that produces by light-emitting component 64a through the concavity portion 631 of sensor housing 630 sidewall and be filled in the washings in this concavity portion 631 and received by photo detector 64b.

Thus, the luminous quantity of adjustment light-emitting component 64a makes and is fixed by the magnitude of voltage of the detection signal of the light income decision of photo detector 64a.The light income of photo detector 64b according to the dirty degree that is filled in the washings in the concavity portion 631, be that turbidity changes.Thus, detect the turbidity of washings according to magnitude of voltage by the detection signal of the light income of photo detector 64b decision.

In addition, when stopping when the 3rd stream Rc supplies with washings, the washings that are filled in the concavity portion 631 flow down downwards along the inner peripheral surface of concavity portion 631 etc.

(4) characteristic of turbidity detection portion

(4-a) in the related dish cleaning machine 1 of this embodiment, turbidity detection portion 60 is set at than accumulates in the high position of water level of the residual water of the washings in the portion of accumulating 12.Thus, at the stream Ra beyond the 3rd stream Rc, Rb, when Rd supplies with washings, the concavity portion 631 of part that washings can not detect the turbidity of washings with the conduct in the turbidity detection portion 60 contacts.In addition, when sink 2 is discharged washings, washings can not remain in the concavity portion 631 of part of turbidity that conduct in the turbidity detection portion 60 detects washings.

Thereby, prevent that incrustation scale, wet goods are attached to the concavity portion 631 of sensor housing 630.Its result can reduce the detection error of the turbidity of washings, thereby can correctly detect the turbidity of washings for a long time.

In addition, turbidity detection portion 60 is set at the inside of sink 2, safeguards easily.Thereby even have under the situation of dirt in concavity portion 631, the user also can easily remove this dirt.

(4-b) as stated, in turbidity detection portion 60, detect the concavity portion 631 ejection washings of nozzle 5x to sensor housing 630 from turbidity.Through washings being filled in the inside of concavity portion 631, cause optical sensor 64 detects the turbidity of washings.

At this, detect nozzle 5x along vertical configuration turbidity, and dispose concavity portion 631 with the relative mode of front end with turbidity detection nozzle 5x.Thus, the bottom 632 of concavity portion 631 is along horizontal plane expansion and faces downwards.Under this state, during along vertical ejection washings, apply roughly hydraulic pressure uniformly to concavity portion 631 to the bottom surface 632 of concavity portion 631 when detect nozzle 5x from turbidity.Thus, in the washings that import to concavity portion 631, be mixed with under the situation of bubble, extruded equably downwards from concavity portion 631 through this bubble of hydraulic pressure.Therefore, continuing under the situation of concavity portion 631 ejection washings, hardly can residual bubble in concavity portion 631 etc. gas phase.In this case, owing in the washings that import between light-emitting component 64a and the photo detector 64b, do not have gas phase, therefore reduced the detection error of washings turbidities.

At this, consider that along continuous straight runs configuration turbidity detects nozzle 5x and detect the situation of the relative mode landscape configuration sensor housing 630 of the front end of nozzle 5x with concavity portion 631 and turbidity.In this case, when detecting nozzle 5x from turbidity, because the influence of gravity is difficult to apply uniform hydraulic pressure to the bottom surface 632 along vertical of concavity portion 631 to concavity portion 631 ejection washings.Therefore, in the washings that import to concavity portion 631, be mixed with under the situation of bubble, the side shifting that might this bubble makes progress in the inside of concavity portion 631 also is detained.

Thereby, detect nozzle 5x and sensor housing 630 about turbidity, comparatively it is desirable to, along vertical configuration turbidity detection nozzle 5x and with the front end relative mode sensors configured housing 630 of concavity portion 631 with turbidity detection nozzle 5x.Thus, as above-mentioned, reduced the detection error of turbidity.

In addition; Bubble in being blended into washings influences under the situation of detection error of turbidity hardly, can along continuous straight runs configuration turbidity detects nozzle 5x and detects the relative mode landscape configuration sensor housing 630 of front end of nozzle 5x with concavity portion 631 and turbidity.In addition, also can dispose turbidity obliquely with respect to vertical detects nozzle 5x and detects the relative mode of the front end of nozzle 5x sensors configured housing 630 obliquely with concavity portion 631 and turbidity.

Turbidity detection portion 60 is arranged on than is accumulated in the high position of peak level of the washings in the portion of accumulating 12 in this case, when the stream Ra beyond the 3rd stream Rc, Rb, Rd supply washings, washings can not contact concavity portion 631 thus yet.In addition, from sink 2 discharge washings the time, washings can not remain in the concavity portion 631 yet.Thereby, prevent in incrustation scale, the concavity portion 631 of wet goods attached to sensor housing 630.

(4-c) as stated, the 16a of window portion of the door 16 of the front surface of formation sink 2 has light transmission.Thus, under door 16 pent states, from the light of outside from the 16a of window portion to the incident of the inside of sink 2.In this case, when detecting the turbidity of washings, the detection accuracy of optical sensor 64 might be owing to stray light reduces.

To this, in turbidity detection portion 60, surround the concavity portion 631 of the turbidity that detects washings by end cover 610.As stated, end cover 610 constitutes the part of the end face of sink 2, and this end face has light-proofness.

Thus, even incide at light outside under the door 16 pent states under the situation of inside of sink 2, can prevent that also this light from entering into the concavity portion 631 of the inboard of end cover 610.Its result, the detection accuracy that prevents optical sensor 64 when detecting the turbidity of washings is owing to stray light reduces.

(4-d) inner surface in the concavity portion 631 of the sensor housing 630 that receives washings has under the hydrophobic situation; When detecting nozzle 5x from turbidity to the release of concavity portion 631 ejection washings, washings as drop easily attached to the inner surface of concavity portion 631.When the droplet drying of the inner surface that is attached to concavity portion 631, be included in dirt in the drop unevenly on the inner surface attached to concavity portion 631.In this case, because there is uneven dirt in the inner surface of concavity portion 631, the turbidity that causes utilizing optical sensor 64 to carry out detects the instability that becomes.

Thereby, comparatively it is desirable to the surperficial possess hydrophilic property of the concavity portion 631 of the sensor housing 630 of reception washings.For example, the inner surface in concavity portion 631 covers hydrophilic resin.

In this case, prevent detecting under the situation that the action of nozzle 5x to concavity portion 631 ejection washings finished washings from turbidity as the inner surface of drop attached to concavity portion 631.Thus, prevent to adhere to dirt unevenly at the inner surface of concavity portion 631.Its result prevents when the turbidity of each detection washings, to reduce owing to the drop that is attached to concavity portion 631 makes the detection accuracy of turbidity.

(5) the initial adjustment of detection signal

In this embodiment during the above-mentioned cleaning of beginning before, adjust so that fix by the magnitude of voltage of the detection signal of the light income of photo detector 64b decision.The luminous quantity of control part 70 (in Fig. 8,9, recording and narrating after a while) adjustment light-emitting component 64a makes the magnitude of voltage by the detection signal of photo detector 64b decision become the voltage (being called a reference value later on) of regulation.Its result; Even light-emitting component 64a, photo detector 64b all the year round under the situation of deterioration, sensor housing 630 all the year round under the situation of deterioration, or under the situation that the light income of photo detector 64b reduces owing to be included in the adhering to of dirt in the washings; Also can be through increasing the luminous quantity of light-emitting component 64a, come will be adjusted into a reference value by the voltage of the detection signal of the light income decision of photo detector 64b at each start of run.Therefore, can correctly detect the turbidity of washings for a long time.In addition, owing to before carrying out cleaning step, adjust a reference value that turbidity detects, therefore can turbidity detection accuracy be reduced owing to water droplet, steam are attached to turbidity detection portion yet.Thereby, pinpoint accuracy and suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.

(6) variation of detection signal

In this embodiment, in above-mentioned cleaning step and rinse step, detect the turbidity of the washings in the sink 2 by the optical sensor 64 of turbidity detection portion 60.Then, variation by the turbidity of optical sensor 64 detected washings is described.

Fig. 7 sequential chart that to be expression change from the magnitude of voltage of the detection signal of optical sensor 64 output (below be called detect voltage).In Fig. 7, except the variation that detects voltage, also illustrate by the variations in temperature of temperature sensor 17 detected washings and the opening and closing of heater 14.

In the example of Fig. 7, during moment t0～t1, carry out draining/water supply step of the step S1 of Fig. 4.At this moment, will be adjusted into a reference value (V3), and discharge the washings that remain in the sink 2 and supply with running water to sink 2 by the magnitude of voltage of the detection signal of optical sensor 64 output.In this example, be lower than 50 ℃ running water to sink 2 supplying temperatures.In drain step, discharge the washings in the portion that accumulates 12 that remains in sink 2 bottoms.In the water supply step, supply with running water to the portion of accumulating 12 from the inwall bottom of sink 2.Thereby in draining/water supply step, washings can not contact with optical sensor.Thereby, can under the state of the dry tack free of optical sensor 64, carry out the correction of a reference value.Therefore, can suppress owing to water droplet, steam produce error.

Then, during as the moment t1～t2 during cleaning, carry out the cleaning step of the step S2 of Fig. 4.As stated, in cleaning step, to the inner loop of the washings that are cleaned thing 10 injections at sink 2.In this case, owing to be blended into the washings from the dirt that is cleaned thing 10 removals, so the turbidity of washings rises gradually.Its result detects voltage and reduces gradually.In addition, the dirty degree that is cleaned thing 10 is big more, and the turbidity of washings rises highly more, and detecting voltage drop must be low more.

In addition, in moment t1 heater 14.In cleaning step,, the temperature of washings closes heater 14 when reaching setting T2, heater 14 when the temperature of washings is reduced to setting T3.Thus, the temperature of washings is maintained at more than or equal in setting T3 and the scope smaller or equal to setting T2.Setting T3 for example is 50 ℃, and setting T2 for example is 53 ℃.Close heater 14 at moment t2.

Then, during moment t2～t3, carry out draining/water supply step of the step S 3 of Fig. 4.That is, employed washings during from sink 2 discharge cleanings, and to the new running water of sink 2 supplies.

Then, during moment t3～t4, carry out the rinse step of the step S4 of Fig. 4.In this case, with cleaning step likewise, to being cleaned washings that thing 10 sprays inner loop at sink 2.But, be removed in cleaning step owing to be cleaned most of dirt of thing 10, so the turbidity step-down of washings.Therefore, comparing detection voltage with cleaning step uprises.In addition, in rinse step, heater 14 keeps and cuts out, but owing to the waste heat of the circulating path of 2 inside of the sink in the cleaning step and washings rises the temperature of washings gradually.

At this, detection voltage minimum in the cleaning step is made as cleans minimum voltage V1, minimum detection voltage in the first time rinse step is made as rinsing minimum voltage V2.In this embodiment,, determine whether carrying out the rinsing second time according to cleaning minimum voltage V1 and cleaning the difference Vo between minimum voltage V1 and the rinsing minimum voltage V2.

Specifically, be higher than under the setting A1 and the situation of difference Vo between cleaning minimum voltage V1 and the rinsing minimum voltage V2 that is predetermined, do not carry out secondary rinsing less than the setting A2 that is predetermined at cleaning minimum voltage V1.In this case, carry out draining/water supply step of the step S5 of Fig. 4 since moment t4.

On the other hand, be lower than at cleaning minimum voltage V1 under the situation and the situation of difference Vo between cleaning minimum voltage V1 and the rinsing minimum voltage V2 of the setting A1 that is predetermined, carry out secondary rinsing greater than the setting A2 that is predetermined.In this case, carry out the draining/water supply step of the step S3 of Fig. 4 and the rinse step of step S4 once more from moment t4.

(7) control system

The control system of the related dish cleaning machine of this embodiment 1 then, is described.Fig. 8 is the block diagram of structure of the control system of expression dish cleaning machine 1.

As shown in Figure 8, dish cleaning machine 1 possesses control part 70.Control part 70 comprises central arithmetic processing apparatus (CPU) 70a, memory 70b, timer 70c and counter 70d.Control part 70 is connected with optical sensor 64, temperature sensor 17, pump 11, heater 14, feed water valve 31a and drier 72.

Control part 70 provides pulse signal PS and detects voltage switching signal KS to optical sensor 64.Record and narrate pulse signal PS after a while in detail and detect voltage switching signal KS.Turbidity by optical sensor 64 detected washings is provided for control part 70 as detection signal TS.Temperature by temperature sensor 17 detected washings is provided for control part 70 as temperature signal HL.In addition, the action of the switch of the opening and closing of the action of control part 70 control pumps 11, heater 14, feed water valve 31a and drier 72.

(8) optical sensor and power supply circuit and detection voltage commutation circuit

Fig. 9 is the circuit diagram of the detailed structure of expression optical sensor 64.As shown in Figure 9, optical sensor 64 comprises power supply circuit 71, element driving circuit 73 and detects voltage commutation circuit 90.

Power supply circuit 71 possesses digital-to-analog (D/A) translation circuit 85, NPN bipolar transistor (following brief note is a transistor) 86, PNP bipolar transistor (following brief note is a transistor) 87 and resistance 88.Element driving circuit 73 possesses light-emitting component 64a, photo detector 64b, digital-to-analog (D/A) translation circuit 81, NPN bipolar transistor (following brief note is a transistor) 82,83 and resistance 84a, 84b, 84c.Detect voltage commutation circuit 90 and possess NPN bipolar transistor (following brief note is a transistor) 92 and resistance 84d, 91.

Power supply circuit 71, element driving circuit 73 and detection voltage commutation circuit 90 are arranged on the printed circuit board (PCB) 64P.The light-emitting component 64a of element driving circuit 73 and photo detector 64b that kind as shown in Figure 6 are configured in the both sides of concavity portion 631.

The input terminal of D/A translation circuit 85 is connected with the lead-out terminal of control part 70 via node N 1.The lead-out terminal of D/A translation circuit 85 is connected with the base stage of transistor 86.The emitter stage of transistor 86 is connected with ground terminal, and the colelctor electrode of transistor 86 is connected via the base stage of resistance 88 with transistor 87.The emitter stage of transistor 87 is connected with the power supply terminal Vd that receives supply voltage VDD, and colelctor electrode is connected with node N2.

The input terminal of D/A translation circuit 81 is connected with the lead-out terminal of control part 70 via node N1.The lead-out terminal of D/A translation circuit 81 is connected with the base stage of transistor 82.The colelctor electrode of transistor 82 is connected with node N2, and emitter stage is connected with the base stage of transistor 83 via resistance 84a.

Between the colelctor electrode of node N2 and transistor 83, be connected light-emitting component 64a.The emitter stage of transistor 83 is connected with the ground terminal with earthing potential GND via resistance 84b.

The photo detector 64b that between node N2 and node N3, is connected optical sensor 64.Between node N3 and ground terminal, be connected resistance 84c, 84d.The voltage of node N3 is provided for control part 70 as detection signal TS.Control part 70 built-in analog/digital (A/D) translation circuits carry out analog/digital (A/D) conversion to the detection signal TS that is provided and obtain and the corresponding detected value of turbidity (magnitude of voltage).

Control part 70 offers the D/A translation circuit 85 of power supply circuit 71 and the D/A translation circuit 81 of element driving circuit 73 with pulse signal PS via node N1.Shown in the sequential chart of Figure 10, but pulse signal PS is fixed as the variable signal of 512 μ S T turn-on time the cycle.

The D/A translation circuit 85 of power supply circuit 71 is to the base stage output of transistor 86 and T correspondent voltage turn-on time of the pulse signal P S that provides from control part 70.In transistor 86, flow through and the corresponding electric current of exporting from D/A translation circuit 85 of voltage.Base stage to transistor 87 provides and the electric current correspondent voltage that flows through transistor 86.In transistor 87, flow through and the corresponding electric current of this base voltage.

In addition, the D/A translation circuit 81 of element driving circuit 73 is to the base stage output of transistor 82 and T correspondent voltage turn-on time of the pulse signal PS that provides from control part 70.In transistor 82, flow through and the corresponding electric current of exporting from D/A translation circuit 81 of voltage.Base stage to transistor 83 provides and the electric current correspondent voltage that flows through transistor 82.In transistor 83, flow through and the corresponding electric current of this base voltage.

When from the pulse signal PS of control part 70 turn-on time, T changed the time, change from the voltage of D/A translation circuit 85 outputs with from the voltage of D/A translation circuit 81 outputs, the electric current that flows through transistor 86 changes with the electric current that flows through transistor 82.Thus, the electric current that flows through transistor 87, light-emitting component 64a and transistor 83 changes.Thereby the luminous intensity of light-emitting component 64a changes, and the light income of photo detector 64b changes.Its result, the electric current that flows through photo detector 64b and resistance 84c, 84d changes, and the voltage of node N3 (magnitude of voltage of detection signal TS) changes.

Detect voltage commutation circuit 90 will output to transistor 92 from the detection signal KS of control part 70 outputs via resistance 91 base stage.The colelctor electrode of transistor 92 is connected with node N4, this node N4 be resistance 84c and and the resistance 84d that is connected in series of resistance 84c between node.The emitter stage of transistor 92 is connected with ground terminal.Output signal KS output 0V or 5V from control part 70.When output signal KS was 0V, transistor 92 was failure to actuate.At this moment, to become the current transformation that will flow through photo detector 64b through resistance 84c and resistance 84d be the value that voltage obtains to detection signal TS.In addition, when output signal KS is 5V, transistor 92 actions.Thus, the colelctor electrode of transistor 92 and the voltage between the emitter stage become 0V, so node N4 becomes the state that is connected with ground terminal.Thereby the current transformation that only will flow through photo detector 64b through resistance 84c is a voltage.

As stated, in cleaning step, be directed between light-emitting component 64a and the photo detector 64b to the washings that the 3rd stream Rc provides.At this, the light income with photo detector 64b before cleaning step is adjusted into a reference value (fixed value).Afterwards, when importing washings, the light income of photo detector 64b changes according to turbidity.Thus, the electric current that flows through node N3 changes, and the voltage of node N3 changes.That is to say, make rotation washer jet 3,4,7, fixedly during the cleaning of moving of cleaning injection equipment such as washer jet 5 before, will be adjusted into a reference value by turbidity detection portion 60 detected values, afterwards, clean according to the turbidity of washings.

In addition, be under 0 the situation, at T turn-on time from the voltage vanishing of D/A translation circuit 85 outputs from the pulse signal PS of control part 70.Thus, the transistor 86 of power supply circuit 71 ends, and transistor 87 ends.Thus, light-emitting component 64a closes.In this embodiment; In draining/water supply step as the step S1 of Fig. 4; Promptly in the concavity portion 631 of sensor housing 630, do not exist under the state of washings, by control part 70 be used to adjust pulse signal PS turn-on time T the output adjustment handle.

Figure 11 is the flow chart that output adjustment that expression is undertaken by control part 70 is handled.Shown in figure 11, control part 70 is set at n=0 (step S101) with the count value n of counter 70d.Then, T turn-on time of control part 70 pulse signal PS that memory 70b is stored is set at T=256 μ s (step S102).

Then, the detection voltage switching signal KS (step S103) of control part 70 output 5V judges whether the count value n of counter 70d is n=8 (step S104).Not (step S104: " denying ") under the situation of n=8 at the count value n of counter 70d, T turn-on time of pulse signal PS is made as T=256 μ s and output pulse signal (step S105).Afterwards, is set the time delay (step S106) of 60ms.This be for make control part 70 after the output pulse signal PS standby till detection signal TS is stable.

Then, control part 70 judge detection signal TS magnitude of voltage VTS (detection voltage) whether smaller or equal to a reference value V3+ Δ V (step S107) that is predetermined.For example, a reference value V3 is more than or equal to 3V and smaller or equal to 4V, Δ V as tolerance more than or equal to 0.1V and smaller or equal to 0.2V.Surpass at the magnitude of voltage VTS of detection signal TS under the situation of a reference value+tolerance (V3+ Δ V) that is predetermined (step S107: " denying "), the count value n of counter 70d is added 1 and be made as n=n+1 (step S108).Afterwards, T turn-on time with pulse signal PS is made as T=T-256/2 ⁿμ s promptly, makes T turn-on time of pulse signal PS reduce 256/2 ⁿμ s (step S 109).For example, when n=1,, therefore become T=256-128=128 μ s turn-on time because T turn-on time of pulse signal PS reduces 256/2=128 μ s.Afterwards, return step S 104.

On the other hand, under the situation of magnitude of voltage VTS smaller or equal to V3+ Δ V of detection signal TS (step S107: " being "), whether the magnitude of voltage VTS that judges detection signal TS is more than or equal to V3-Δ V (step S 110) in step S107.Under the situation of the magnitude of voltage VTS of detection signal TS (step S110: " denying "), the count value n of counter 70 is added 1 and be made as n=n+1 (step S111) less than a reference value-tolerance that is predetermined (V3-Δ V).Afterwards, T turn-on time with pulse signal PS is made as T=T+256/2 ⁿμ s promptly, makes T turn-on time of pulse signal PS increase by 256/2 ⁿμ s (step S112).For example, when current T turn-on time is 128 μ s and n=2, become T=128+256/4=192 μ s turn-on time of pulse signal PS.Afterwards, return step S 104.

Like this, according to step S107 and step S110, when the magnitude of voltage VTS of detection signal TS gets in the scope of a reference value ± tolerance (step S107: " being " and step S110: " being "), finish output adjustment processing.

At this, an example of above-mentioned steps is shown.A reference value is made as 3.6V and tolerance is made as 0.1V.The sequential chart of the example that the magnitude of voltage of the detection signal TS when Figure 12 is expression output adjustment processing changes.When the count value n of counter 70d was n=0, T turn-on time of pulse signal PS was T=256 μ s.

If be made as pulse signal P S turn-on time the detection signal TS during T=256 μ s magnitude of voltage VTS be 3.0V, then become the relation (step S110: " denying ") of 3.0＜3.6 (a reference value)-0.1 (tolerance).Thereby, in step S111, establish n=1, increase T turn-on time of pulse signal PS.That is to say T=256+256/2=384 μ s in step S112.

If be made as pulse signal PS turn-on time the detection signal TS during T=384 μ s magnitude of voltage VTS be 4.0V, then become the relation (step S107: " denying ") of 4.0＞3.6 (a reference value)+0.1 (tolerance).Thereby, in step S 108, establish n=2, reduce T turn-on time of pulse signal PS.That is to say, in step S109, T=384-256/4=320 μ s.

If be made as pulse signal P S turn-on time the detection signal TS during T=320 μ s magnitude of voltage VTS be 3.8V, then become the relation (step S107: " denying ") of 3.8＞3.6 (a reference value)+0.1 (tolerance).Thereby, further reduce T turn-on time of pulse signal PS.That is, in step S108, establish n=3, reduce T turn-on time of pulse signal PS.That is to say, in step S109, T=320-256/8=288 μ s.

If be made as pulse signal P S turn-on time the detection signal TS during T=288 μ s magnitude of voltage VTS be 3.55V, then get into the scope (step S107: " being " and step S110: " being ") of 3.6V ± 0.1.Thus, finishing the output adjustment handles.In addition, till changing T turn-on time, be provided with the time delay of 60ms next time, so compare with reference voltage after can becoming stable value at the voltage of detection signal TS from T turn-on time that changes pulse signal PS.

On the other hand, when the count value n of counter 70d is n=8 in step S104 (step S104: " being "), judges and detect whether voltage switching signal KS is 5V (step S113).Detecting under the situation that voltage switching signal KS is 5V (step S113: " being "), the count value n of counter 70d is being set at n=0 (step S114).Afterwards, will detect voltage switching signal KS and be made as 0V (step S115).Thus, transistor 92 becomes and ends, and can access the voltage of detection signal TS according to the relation between resistance 84c and the resistance 84d.For example, when the electric current that will flow through photo detector 64b be made as 1.5mA and with resistance 84c be made as 2K Ω, when resistance 84d is made as 0 Ω, the voltage of detection signal TS is 1.5 * 2=3.0V.When resistance 84c is made as 2K Ω, when resistance 84d is made as 1k Ω, the voltage of detection signal TS is 1.5 * (2+1)=4.5V, can detection signal TS be amplified, even therefore also can export adjustment detecting under the lower situation of voltage.Consider the deviation of optical sensor 64, deterioration all the year round, the resistance value of resistance 84c, 84d is redefined for the resistance value that can detection signal TS be adjusted into reference voltage.

Figure 13 be the indicating impulse signal turn-on time T and the voltage of detection signal TS between the curve map of relation.Consider the voltage of detection signal TS by the situation of resistance 84c decision, promptly to detect voltage switching signal KS be the situation of 5V.Under the less situation of the resistance value of resistance 84c, though make pulse signal TS turn-on time T near 512 maximum μ s, the voltage of detection signal TS do not reach yet a reference value (Figure 13 a).On the contrary, under the bigger situation of the resistance value of resistance 84c, when T turn-on time that makes pulse signal TS became big, the voltage of detection signal TS was saturated halfway, even change detection signal TS turn-on time can not change yet (c of Figure 13).For example, if the turn-on time of pulse signal detection signal TS during T=120 μ s voltage become about 5V, then when carrying out above-mentioned output adjustment and handle, adjust T turn-on time in need be during 0 to 120 μ s.Under the situation of resistance value the best (b of Figure 13), can in the scope of 0 to 512 μ s, adjust T turn-on time.Yet, aforesaid must be during 0 to 120 μ s in the situation of adjustment T turn-on time compare with the situation of the best, need adjust with the accuracy of 120/512=about 1/4.That is, generation can't be adjusted the situation of detection signal TS in the scope of a reference value ± tolerance.Certainly, if establish tolerance more greatly then can adjust, but the detection accuracy variation of dirty degree in this case.

In this embodiment, be provided with one and detect voltage switching signal KS, but, adjust the voltage of detection signal TS more easily through a plurality of detection voltage switching signal KS are set.When a plurality of detection voltage switching signal KS is set, owing to the characteristic of the parts of light-emitting component 64a, photo detector 64b, deviation, also can adjust when dirt, water droplet, the steam of deterioration, the washings inner surface that is attached to concavity portion 631 causes that detection signal reduces all the year round.

On the other hand, in the flow chart of Figure 11, in the time will detecting voltage switching signal KS and be set at 0V (step S115), likewise carry out the adjustment of step S105 to step S112 with above-mentioned.Under situation about can't adjust owing to light-emitting component 64a, photo detector 64b break down, the circuit block of optical sensor 64 breaks down, the count value of counter 70d is that n=8 (step S104: " being ") and detection voltage switching signal KS are 0V (step S113: " denying ").Carry out abnormality detection (step S 116) this moment, finish adjustment.In addition, in this case, control part 70 is regarded as the dirty degree of washings and carries out later action greatly.That is to say that control part 70 also can't be regarded as turbidity detection portion 60 and detect maximum turbidity being adjusted under the situation of a reference value by turbidity detection portion 60 detected values making to move as the detection voltage commutation circuit 90 that detects the voltage switching part.

Figure 14 is the curve map of the relation between the voltage of turbidity and detection signal TS of expression washings.Solid line representes to detect the situation that the voltage switching signal is 5V, and dotted line representes to detect the situation that the voltage switching signal is 0V.Voltage with detection signal TS before cleaning is adjusted into a reference value ± tolerance.Afterwards, when cleaning, reduce under the situation of turbidity of the washings when judging washing according to the voltage of detection signal TS, no matter detecting the voltage switching signal is 0V or 5V, and the voltage of detection signal TS all likewise changes.That is, with the value of resistance value 84c, 84d irrespectively, as long as before cleaning, the voltage of detection signal TS is adjusted in the scope of a reference value ± tolerance, just also can detect the turbidity of washings with identical accuracy.In addition, in cleaning step and rinse step, has pulse signal PS through output adjustment processing adjusted turn-on time of T from control part 70 outputs.

At this, because there is deviation in the characteristic of light-emitting component 64a and photo detector 64b, if therefore T turn-on time of pulse signal PS is fixed, even then the turbidity of washings is identical, the magnitude of voltage of detection signal TS can be not identical yet.Therefore, can't correctly detect the turbidity of washings.

Therefore, when using dish cleaning machine 1, all handle T turn-on time that adjusts pulse signal PS through the output adjustment in advance at every turn make that the magnitude of voltage of detection signal TS is consistent with a reference value V3.Thus, can eliminate because the magnitude of voltage deviation of the caused detection signal TS of characteristic of light-emitting component 64a and photo detector 64b.

In addition, all the year round under the situation of deterioration, if T turn-on time of pulse signal PS is fixed, even then the turbidity of washings is identical, the magnitude of voltage of detection signal TS is also different at light-emitting component 64a and photo detector 64b.Therefore, can't correctly detect the turbidity of washings.In this case, also can eliminate the magnitude of voltage deviation of the caused detection signal TS of deterioration all the year round by light-emitting component 64a and photo detector 64b.

And because the use of dish cleaning machine 1, the concavity portion 631 of sensor housing 630 is attached with dirt sometimes.As the dirt of concavity portion 631, the pigment dirt that enumerate out dirt that the oil that comprised by food materials forms, forms by dark food materials such as currys and be included in formed dirts of hard water composition (so-called incrustation scale) such as calcium in the washings etc.Thus, have in concavity portion 631 under the situation of dirt, the magnitude of voltage of detection signal TS and concavity portion 631 are that the situation of clean state is compared to some extent and changed.

Therefore, handle, compensate variation by the magnitude of voltage of the caused detection signal TS of the dirt of concavity portion 631 through exporting adjustment under the state that in the concavity portion 631 of sensor housing 630, does not have washings.Thus, even have under the situation of dirt, also can correctly discern the turbidity of washings in the concavity portion 631 of sensor housing 630.

(9) control action

The control action of control part 70 then, is described.Figure 15～Figure 19 is the flow chart of the control action of expression control part 70.

Shown in figure 15, at first, control part 70 carries out above-mentioned output adjustment and handles (step S11).Thus, T turn-on time of adjustment pulse signal PS makes the magnitude of voltage of detection signal TS become a reference value V3.T turn-on time that memory 70b is stored is updated to adjusted turn-on time of T.Afterwards, control part 70 is made as 0 through T turn-on time with pulse signal PS and closes optical sensor 64 (step S12).

Then, control part 70 rotates to contrary direction through the motor that makes pump 11 and discharges the washings (step S 13) that remain in sink 2 inside.Then, control part 70 supplies with to the portion that accumulates 12 of sink 2 washings (step S14) of ormal weight through the switching of control feed water valve 31a.

Then, control part 70 judges according to the temperature signal HL from temperature sensor 17 whether the temperature of the washings of the portion that accumulates 12 inside is lower than setting T1 (step S15).As stated, setting T1 for example is 60 ℃.Be lower than in the temperature of the inner washings of the portion of accumulating 12 under the situation of setting T1 (step S15: " being "), control part 70 is opened optical sensors 64 (step S16).Specifically, control part 70 output pulse signal PS, this pulse signal PS have output adjustment processing adjusted turn-on time of the T through step S11.Thus, light-emitting component 64a is luminous.

Then, control part 70 begins to store the minimum voltage value (step S17) from the detection signal TS of optical sensor 64.Specifically, control part 70 will be at first the magnitude of voltage from the detection signal TS of optical sensor 64 outputs stores into the memory 70b as cleaning minimum voltage V1 in moment of step S16.Afterwards, when the magnitude of voltage from the detection signal TS of optical sensor 64 output is lower than the cleaning minimum voltage V1 that memory 70b stored, control part 70 will clean minimum voltage V1 and be updated to lower magnitude of voltage.

Then, control part 70 begins to clean and is cleaned thing 10 (step S18).Specifically, control part 70 rotates to positive direction through the motor that makes pump 11 and makes the inner loop of washings at sink 2, to being cleaned thing 10 continuous injection washings.

On the other hand, in step S15, under the situation of temperature more than or equal to setting T1 of the inner washings of the portion of accumulating 12 (step S15: " denying "), control part 70 is fixed as optical sensor 64 and closes (step S19).In this case, optical sensor 64 keeps and cuts out till the release of dish cleaning machine 1.In addition, control part 70 will clean minimum voltage V1 and be made as 0 and store (step S20) among the memory 70b into.Afterwards, control part 70 begins to clean and is cleaned thing 10 (step S18).

Then, shown in figure 16, control part 70 is according to the temperature signal HL from temperature sensor 17, and whether judgement is lower than setting T1 (step S 21) in the temperature of the washings of the inner loop of sink 2.Under the situation of temperature more than or equal to setting T1 of the washings of the inner loop of sink 2 (step S21: " denying "); With above-mentioned steps S19, S 20 likewise; Control part 70 is fixed as optical sensor 64 and closes, and will clean minimum voltage V1 and be made as 0 and store (step S22, S23) among the memory 70b into.Afterwards, the processing of control part 70 entering step S24.In addition, under the situation of the processing of having carried out above-mentioned steps S19, S20, do not carry out the processing of step S22, S 23.

On the other hand, in step S21, the temperature of circulated washing water is lower than under the situation of setting T1 (step S21: " being ") in sink 2, and control part 70 judges whether to have passed through the predefined cleaning stipulated time (step S24).Under not through the situation of cleaning the stipulated time (step S24: " deny "), control part 70 is according to the temperature signal HL from temperature sensor 17, judgement in the temperature of the washings of the inner loop of sink 2 whether smaller or equal to setting T3 (step S25).As stated, setting T3 for example is 50 ℃.Be higher than in the temperature of the washings of the inner loop of sink 2 under the situation of setting T3 (step S 25: " denying "), control part 70 returns the processing of step S21.Under the situation of temperature smaller or equal to setting T2 of the washings of the inner loop of sink 2 (step S25: " being "), control part 70 heater 14 (step S26).Thus, the temperature of circulated washing water rises gradually in sink 2.

Then, control part 70 judges whether to have passed through the above-mentioned cleaning stipulated time (step S27).Do not passing through under the situation of cleaning the stipulated time (step S27: " denying "), control part 70 is according to the temperature signal HL from temperature sensor 17, and whether judgement has reached setting T2 (step S28) in the temperature of the washings of the inner loop of sink 2.As stated, setting T2 for example is 53 ℃.Be lower than in the temperature of the washings of the inner loop of sink 2 under the situation of setting T2 (step S28: " denying "), control part 70 returns the processing of step S27.

Reach in the temperature of the washings of the inner loop of sink 2 under the situation of setting T3 (step S28: " being "), control part 70 is closed heater 14 (step S29).Thus, the temperature at the washings of the inner loop of sink 2 descends gradually.Afterwards, control part 70 returns the processing of step S21.

In step S24, through under the situation of cleaning stipulated time (step S24: " being "), control part 70 is confirmed the cleaning minimum voltage V1 (step S31) that memory 70b is stored constantly at this.In addition, under the situation of the processing of having carried out step S20, S23, cleaning minimum voltage V1 is 0.Afterwards, control part 70 is closed optical sensor 64 (step S32), and stops the action of pump 11, thereby finishes to be cleaned the cleaning (step S33) of thing 10.

In step S27, through under the situation of cleaning stipulated time (step S27: " being "), control part 70 is closed heater 14 (step S30), gets into the processing of step S31.

Then, shown in figure 17, control part 70 rotates the washings (step S41) of discharging sink 2 inside through the motor that makes pump 11 to contrary direction.Then, control part 70 supplies with to the portion that accumulates 12 of sink 2 washings (step S42) of ormal weight through the switching of control feed water valve 31a.

Then, control part 70 judges according to the temperature signal HL from temperature sensor 17 whether the temperature of the washings of the portion that accumulates 12 inside is lower than setting T1 (step S43).Be lower than in the temperature of the inner washings of the portion of accumulating 12 under the situation of setting T 1 (step S43: " being "); Control part 70 is opened optical sensor 64 (step S44), and begins to store the minimum voltage value (step S45) from the detection signal TS of optical sensor 64.

In this case, control part 70 will store into the memory 70b as rinsing minimum voltage V2 by the magnitude of voltage from the detection signal TS of optical sensor 64 outputs in moment of step S44.Afterwards, when the magnitude of voltage from the detection signal TS of optical sensor 64 output was lower than the rinsing minimum voltage V2 that memory 70b stored, control part 70 was updated to lower magnitude of voltage with the rinsing minimum voltage V2 that memory 70b is stored.

Then, control part 70 begins to be cleaned first rinsing (step S46) of thing 10.Specifically, control part 70 rotates to positive direction through the motor that makes pump 11 and makes the inner loop of washings at sink 2, to being cleaned thing 10 continuous injection washings.

On the other hand, in step S43, under the situation of temperature more than or equal to setting T1 of the inner washings of the portion of accumulating 12 (step S43: " denying "), control part 70 is fixed as optical sensor 64 and closes (step S47).In addition, in step S19, S22, optical sensor 64 is fixed as under the situation of cutting out, does not carry out the processing of step S47.

Then, control part 70 is made as 0 and store (step S48) among the memory 70b into rinsing minimum voltage V2.Afterwards, control part 70 begins to be cleaned first rinsing (step S46) of thing 10.

Then, control part 70 has judged whether to pass through the first rinsing stipulated time (step S49) that is predetermined.There is not under the situation through the first rinsing stipulated time (step S49: " denying ") processing of control part 70 repeating step S49.Under the situation of passing through for the first rinsing stipulated time (step S49: " being "), control part 70 is confirmed the rinsing minimum voltage V2 (step S50) that memory 70b is stored constantly at this.In addition, under the situation of the processing of having carried out step S48, rinsing minimum voltage V2 is 0.

Then, control part 70 is closed optical sensor 64 (step S51).In addition, in step S19, S22, S47, under the pent situation of optical sensor 64, do not carry out the processing of step S51.Afterwards, control part 70 stops the action of pump 11, finishes to be cleaned first rinsing (step S52) of thing 10.

Then, shown in figure 18, control part 70 judges that whether the cleaning minimum voltage V1 that in the step S31 of Figure 16, confirms is smaller or equal to the setting A1 (step S61) that is predetermined.Be higher than under the situation of setting A1 (step S61: " deny ") cleaning minimum voltage V1, control part 70 judge clean minimum voltage V1 and in the step S50 of Figure 17 the difference Vo between the definite rinsing minimum voltage V2 whether more than or equal to the setting A2 (step S62) that is predetermined.In step S62, under the situation of difference Vo less than setting A2 of cleaning between minimum voltage V1 and the rinsing minimum voltage V2 (step S62: " denying "), the processing of the step S68 that states after control part 70 gets into.

On the other hand; In step S61, clean under the situation of minimum voltage V1 smaller or equal to setting A1 (step S61: " being "); Perhaps in step S62, clean under the situation of difference Vo more than or equal to setting A2 between minimum voltage V1 and the rinsing minimum voltage V2 (step S62: " being "), control part 70 rotates the washings (step S63) of discharging sink 2 inside through the motor that makes pump 11 to contrary direction.Then, control part 70 supplies with to the portion that accumulates 12 of sink 2 washings (step S64) of ormal weight through the switching of control feed water valve 31a.

Then, control part 70 rotates second rinsing (step S65) that begins to be cleaned thing 10 through the motor that makes pump 11 to positive direction.Then, control part 70 has judged whether to pass through the second rinsing stipulated time (step S66) that is predetermined.There is not under the situation through the second rinsing stipulated time (step S66: " denying ") processing of control part 70 repeating step S66.Under the situation of passing through for the second rinsing stipulated time (step S66: " being "), control part 70 stops the action of pump 11, finishes to be cleaned second rinsing (step S67) of thing 10.

Then, control part 70 rotates the washings (step S68) of discharging sink 2 inside through the motor that makes pump 11 to contrary direction.Then, control part 70 supplies with to the portion that accumulates 12 of sink 2 washings (step S69) of ormal weight through the switching of control feed water valve 31a.

Then, shown in figure 19, control part 70 heater 14 (step S71).Thus, the temperature that supplies to the washings of the portion of accumulating 12 rises.Then, control part 70 comes to begin to be cleaned the heating rinsing (step S72) of thing 10 to being cleaned the washings that thing 10 sprays high temperature to the positive direction rotation through the motor that makes pump 11.

Then, control part 70 judges according to the temperature signal HL from temperature sensor 17 whether the temperature of carrying out circulated washing water has reached setting T4 (step S73).Setting T4 for example is 70 ℃.Do not reach under the situation of setting T4 (step S73: " denying ") processing of control part 70 repeating step S73 in the temperature of carrying out circulated washing water.Reached in the temperature of carrying out circulated washing water under the situation of setting T4 (step S73: " being "), control part 70 stops the action of pump 11, finishes to be cleaned the heating rinsing (step S74) of thing 10.

Then, control part 70 is closed heater 14 (step S75).Then, control part 70 rotates to contrary direction through the motor that makes pump 11, discharges the washings (step S76) of sink 2 inside.Then, control part 70 heater 14 (step S77), and control drier 72 makes and produces air-flow in the inner space of sink 2, begins to be cleaned the drying (step S78) of thing 10 thus.

Then, control part 70 has judged whether to pass through the dry stipulated time (step S79) that is predetermined.Not under the situation of super-dry stipulated time (step S79: " denying "), the processing of control part 70 repeating step S79.Under the situation of having passed through the dry stipulated time (step S79: " being "), control part 70 stops the action of drier 72, finishes to be cleaned the drying (step S80) of thing 10 thus.Thus, a series of processing in the dish cleaning machine 1 finishes.

(10) effect

(10-a) like this, in this embodiment, adjust in the draining/water supply process that carries out before during cleaning so that fix by the magnitude of voltage of the detection signal of the light income decision of photo detector 64b.The luminous quantity of control part 70 adjustment light-emitting component 64a makes the voltage (a reference value) that is become regulation by the magnitude of voltage of the detection signal of photo detector 64b decision.Its result; Even since light-emitting component 64a, photo detector 64b all the year round deterioration or sensor housing 630 all the year round deterioration, be included in the adhering to of dirt in the washings and the light income of photo detector 64b reduces; Also can be through increasing the luminous quantity of light-emitting component 64a, come will be adjusted into a reference value by the voltage of the detection signal of the light income decision of photo detector 64b at each start of run.Therefore, can correctly detect the turbidity of washings for a long time.Therefore in addition, owing to adjusted before during cleaning, water droplet can not take place yet, steam is attached to turbidity detection portion and makes turbidity detect the situation that accuracy reduces.Thereby, pinpoint accuracy and suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.

In addition; Even reduce owing to light-emitting component 64a, the further deterioration of photo detector 64b and dirt further adhere to the light income that causes photo detector 64b; Detect voltage switching signal KS through being provided with; Even at the voltage of detection signal TS under the lower and situation that also can't adjust through the luminous quantity that increases light-emitting component 64a, also can be through amplifying and be adjusted into a reference value to detecting voltage.Therefore, pinpoint accuracy and suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.

In addition; Following situation is regarded as unusual and sets the cleaning condition when detecting maximum turbidity:, also can't the voltage of detection signal TS be adjusted into a reference value even increase the luminous quantity of light-emitting component 64a because optical sensor 64 breaks down and detection voltage is amplified through detecting voltage switching signal KS.Thus, can remove the dirt that is cleaned thing fully.

(10-b) like this, in this embodiment, in step S61, cleaning minimum voltage V1 in the cleaning step and setting A1 are compared.V1 is lower than under the situation of setting A1 at the cleaning minimum voltage, and the turbidity that is judged as washings is high.In this case, it is big to be judged as the turbidity that is cleaned thing 10.

On the other hand, when the testing conditions of optical sensor 64 not simultaneously, even the turbidity of washings is identical, the magnitude of voltage of detection signal TS also can create a difference.Therefore, have following situation: be higher than setting A1 although clean minimum voltage V1, in fact the turbidity of washings is higher.In addition, the testing conditions of optical sensor 64 comprise characteristic, the optical sensor 64 of light-emitting component 64a and photo detector 64b component-assembled property, sensor housing 630 concavity portion 631 dirty degree, supply with the supply condition of cleaning solutions etc. to the concavity portion 631 of sensor housing 630.

In this embodiment, can handle that the testing conditions of optical sensor 64 is fixed through the output adjustment.Yet, be attached at water droplet under the state of concavity portion 631 of sensor housing 630, because water droplet and light generation diffuse reflection or disperse, the magnitude of voltage step-down of detection signal TS thus.When the output adjustment of under this state, carrying out step S11 was handled, the luminous intensity that T turn-on time of pulse signal PS is adjusted to light-emitting component 64a was higher than the luminous intensity of under the state that does not have the water droplet influence, exporting the situation of adjusting processing.

In this case, the magnitude of voltage of the detection signal TS in cleaning step and the rinse step with under the state that does not have the water droplet influence, export situation that adjustment handles and compare relatively and uprise.Thus, although in fact the turbidity of washings is higher, cleans minimum voltage V1 and also be higher than setting A1.

In addition, in this embodiment, in cleaning step, in the temperature of the washings of the inner loop of sink 2 is maintained at more than or equal to setting T3 and the scope smaller or equal to setting T2.In this case, through suitably setting setting T2, T3, can remove the dirt that is cleaned thing 10 that is difficult at low temperatures remove fully.Be difficult to the dirt removed at low temperatures, for example enumerate out greasy dirts such as butter or lard.

In addition, in cleaning step, with the minimum magnitude of voltage of detection signal TS as cleaning minimum voltage V1.Thus, in the turbidity that is cleaned thing 10 is judged, can not use and be difficult at low temperatures from being cleaned dirt that thing 10 removes etc. not by the turbidity of the cleaning solution under the state of removing fully.Thereby, prevent to judge by error the turbidity that is cleaned thing 10.

In addition, as stated,, can remove the dirt that is cleaned thing 10 fully through the temperature of washings being adjusted in the scope of regulation.Therefore, also can in the scope of the temperature of washings being adjusted to regulation, begin to utilize afterwards optical sensor 64 to detect turbidities.

(11) other embodiment

In the above-described embodiment; Control the number of times of rinse step according to the difference of the turbidity of the turbidity of the turbidity of the washings in the cleaning step and the washings in the cleaning step and the washings in first rinse step, but also can carry out other control according to the difference of the turbidity of the turbidity of the turbidity of the washings in the cleaning step and the washings in the cleaning step and the washings in first rinse step.

For example, can be adjusted at the amount of the washings that use in the rinse step for the second time according to the difference of the turbidity of the washings in the turbidity of the turbidity of the washings in the cleaning step and the washings in the cleaning step and the rinse step for the first time.In this case; Be judged as under the big situation of the turbidity that is cleaned thing 10; The amount of the washings that will use in the rinse step in the second time is adjusted into more; Be judged as under the little situation of the turbidity that is cleaned thing 10, the amount of the washings that will use in the rinse step in the second time is adjusted into less.

In addition, can adjust the time of rinse step for the second time according to the turbidity of the washings in the turbidity of the washings in the cleaning step and the rinse step for the first time.In this case, be judged as under the big situation of the turbidity that is cleaned thing 10, the time of rinse step is adjusted into longlyer with the second time, is being judged as under the little situation of the turbidity that is cleaned thing 10, and the time of rinse step is adjusted into shorter with the second time.

In addition, be cleaned the turbidity of thing 10, then also can be only carry out the control of the action after the rinse step for the first time according to the difference of the turbidity of the washings in the turbidity of the washings in the cleaning step and the rinse step for the first time if can judge rightly.In addition, in the above-described embodiment, detect the turbidity of the washings in the turbidity of the washings in the cleaning steps and the rinse step for the first time by optical sensor 64, but can regularly detect the turbidity of washings at other.

For example; Detect the turbidity of the washings in the rinse step for the first time and the turbidity of the washings in the rinse step for the second time, can control the action after the rinse step for the second time according to the difference of the turbidity of the washings in the turbidity of the washings in the first time rinse step and the rinse step for the second time.In this case, under the situation that for example difference of the turbidity of the washings in the turbidity of the washings in first time rinse step and the rinse step for the second time is bigger, can carry out rinse step for the third time.In addition, consider that also the turbidity of the washings in the rinse step second time is higher than the situation of the turbidity of the washings in the rinse step first time.In this case, become clean through carrying out for the third time rinse step or carry out cleaning step once more, can make reliably to be cleaned thing 10.

In addition, in this embodiment, have cleaning step and rinse step during the cleaning, can also have drying steps.In addition, also can during cleaning, only implement cleaning step, rinse step or drying steps.In addition, in the dish cleaning machine operation process, can will be adjusted into a reference value by the detected value of turbidity detection portion from as the rotation washer jet of washings injection equipment or fixedly before the washer jet jet cleaning water.

As discussed above, the present invention is a kind of dish cleaning machine, cleans through jet cleaning water and is cleaned thing, and this dish cleaning machine possesses: sink, and it holds and is cleaned thing, has the portion that accumulates that accumulates washings; The washings injection equipment, its thing that is cleaned in being contained in sink sprays the washings accumulate in the portion of accumulating and cleans and be cleaned thing; Turbidity detection portion, its be set at sink inside, than accumulate portion the high position of water level of residual water of the washings that can accumulate, detect the turbidity of the inner washings of sink; And control part; It will be adjusted into a reference value by the detected value of turbidity detection portion before during the washings injection equipment being moved clean the cleaning that is cleaned thing, afterwards according to during cleaning, setting the cleaning condition that is cleaned thing by the turbidity of the detected washings of turbidity detection portion.

In this dish cleaning machine, accumulated and accumulated washings in the portion in that sink has.During cleaning, the thing injection that is cleaned that is contained in the sink is accumulated in the washings in the portion of accumulating through the washings injection equipment.Thus, cleaning is cleaned thing.

In this case, prevent that washings from always contacting turbidity detection portion.Thus, the dirt that is cleaned thing that washings comprised hardly can be attached on the turbidity detection portion.In addition; During cleaning before not under the state of washings injection equipment jet cleaning water; Promptly when turbidity detection portion does not contact washings; To be adjusted into a reference value by the detected value of turbidity detection portion, and the dirt that water droplet, steam, washings comprise can not take place thus be attached to turbidity detection portion and make turbidity detect the situation that accuracy reduces.Thereby, pinpoint accuracy and suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.

In addition; In the present invention; Control part also possesses the detection voltage switching part of change by the detected value of turbidity detection portion, and control part can't move detection voltage switching part and change the value that is detected detected value is adjusted under the situation of a reference value by turbidity detection portion.Even for example because constitute the deviation of the parts of turbidity detection portion, change in time, the influence of environment temperature makes each parts deterioration of turbidity detection portion and detected value can't become under the situation of a reference value by turbidity detection portion, also can be adjusted into a reference value through changing detected value.Therefore, pinpoint accuracy and suitably carry out and be cleaned the dirty degree corresponding cleaning of thing for a long time.

In addition; In the present invention; Control part detects the voltage switching part and moves and also can't be regarded as turbidity detection portion and detect maximum turbidity detected value is adjusted under the situation of a reference value by turbidity detection portion making, and can the cleaning condition that be cleaned thing be made as the best.

Claims (2)

1. dish cleaning machine cleans through jet cleaning water and to be cleaned thing, and this dish cleaning machine possesses:

Sink, it holds and is cleaned thing, has the portion that accumulates that accumulates washings;

The washings injection equipment, its thing that is cleaned in being contained in above-mentioned sink sprays and to accumulate in the above-mentioned washings that accumulate in the portion and clean and be cleaned thing;

Turbidity detection portion, its be set at above-mentioned sink inner, than the above-mentioned high position of water level of accumulating the residual water of the washings that institute of portion can accumulate, detect the turbidity of the washings of above-mentioned sink inside;

Control part; It will be adjusted into a reference value by the detected value of above-mentioned turbidity detection portion before during the washings injection equipment being moved clean the cleaning that is cleaned thing, afterwards according to during above-mentioned cleaning, setting the above-mentioned cleaning condition that is cleaned thing by the turbidity of the detected washings of above-mentioned turbidity detection portion; And

Detect the voltage switching part, it changes by the detected value of above-mentioned turbidity detection portion,

If above-mentioned control part can't then change detected value through above-mentioned detection voltage switching part is moved with being adjusted into a reference value by the detected value of above-mentioned turbidity detection portion.

2. dish cleaning machine according to claim 1 is characterized in that,

Above-mentioned control part can't be regarded as above-mentioned turbidity detection portion and detect maximum turbidity being adjusted under the situation of a reference value by the detected value of above-mentioned turbidity detection portion in that above-mentioned detection voltage switching part is moved also.

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