KR20100103404A - Dish washer - Google Patents

Abstract

PURPOSE: A dish washer is provided to prevent pollutants, such as oil floating on the surface of the water, from becoming stuck to a turbidity detecting unit. CONSTITUTION: A dish washer(1) comprises a washing drum(2), a washing unit, a washing pump, a water storing unit, and a turbidity detecting unit(60). The washing bath holds tableware(10). The washing unit jets tap water to the tableware. The washing pump forcibly sends the washing water to the washing unit. The water storing unit is installed in the washing drum. The water storing unit stores the water. The turbidity detecting unit is located on the higher location than the maximum water level of the water storing unit in the washing drum. The turbidity detecting unit detects the turbidity of the water provided from fluid jetting holes(20a,20b) of the washing unit.

Description

Dish Washer {DISH WASHER}

The present invention relates to a dishwasher for washing dishes.

As a dish washer provided with the optical sensor for detecting the turbidity (transmission degree) of the liquid employ | adopted by washing of dishes, For example, the dish washer of Unexamined-Japanese-Patent No. 2006-204565 (patent document 1) is demonstrated. do.

The dishwasher of patent document 1 is equipped with the washing tank which accommodates tableware, the some washing nozzle arrange | positioned inside the washing tank, and the washing pump which supplies washing water to some washing nozzle. In this dish washing machine, when washing dishes, for example, dishes are accommodated in the washing tank and a predetermined amount of washing water is supplied into the washing tank. The washing water stored in the lower part of the washing tank is supplied to each washing nozzle by the washing pump.

The washing water from each washing nozzle is sprayed on the dishes accommodated in the washing tank, and washing of the dishes is performed. The washing water sprayed on the tableware is stored at the bottom of the washing tank and is sent to each washing nozzle again by the washing pump.

The dishwasher of patent document 1 also has a fountain part. The fountain is connected to the plurality of cleaning nozzles downstream of the cleaning pump. The valve body is provided inside the fountain. By operating the valve body, the washing water pumped by the washing pump is selectively supplied to any one of the plurality of washing nozzles.

In addition, the fountain may be equipped with a detector that detects the turbidity of the washing water flowing therein and detects the operation of the valve body. As the detection unit, a transmissive optical sensor consisting of a light emitting unit and a light receiving unit can be used. Based on the detection result by this detection part, the turbidity of the wash water at the time of washing | cleaning by each washing | cleaning nozzle is detected. Thereby, washing | cleaning of a tableware can be controlled for every washing nozzle. Moreover, in this structure, as long as wash water exists in the inside of a washing tank, wash water always exists in a fountain part. For this reason, the inner surface of the fountain may be soiled over time due to scale.

In addition, in the dishwasher of patent document 1, the water level inside a water storage part rises and falls at the time of washing | cleaning and drainage. On the water surface of the washing water collected in the reservoir, contaminants, such as oil, which have adhered to the object to be cleaned, such as tableware, are suspended. For this reason, contaminants such as oil collected on the surface of the washing water adhere to the surface of the optical sensor located at a lower position than the highest level of the washing water. Therefore, when the surface of the optical sensor is contaminated with contaminants such as oil, the detection accuracy of the optical sensor is lowered, and the turbidity of the washing water is not accurately detected. In this case, it becomes difficult to accurately control the washing of the tableware for each cleaning nozzle.

The present invention provides a dish washer capable of accurately detecting the turbidity of the washing water.

The dishwasher of this invention is equipped with the washing tank which accommodates a to-be-cleaned object, the washing | cleaning part which injects wash water to a to-be-cleaned object, and the washing | cleaning pump which conveys wash water to a washing | cleaning part. Moreover, this invention is provided in the inside of a washing tank, and is equipped with the storage part which stores washing water. Moreover, this invention is equipped with the turbidity detection part provided in the storage part inside a washing tank higher than the highest water level of the washing water which can be stored. Moreover, in this invention, a turbidity detection part detects the turbidity of the wash water supplied from the liquid injection port provided in a washing | cleaning part.

With this configuration, the turbidity detection unit is provided at a position higher than the highest water level of the washing water that can be stored in the storage unit in the washing tank. Therefore, when the washing water is not supplied to the washing portion, the washing water does not exist in the turbidity detection portion.

Accordingly, the dishwasher of the present invention is reduced in that contaminants such as oil floating on the surface of the washing water adhere to the turbidity detection unit. As a result, the turbidity of the washing water can be accurately detected by the turbidity detection unit.

BRIEF DESCRIPTION OF THE DRAWINGS The main part broken front view of the dishwasher which concerns on Embodiment 1 of this invention,
2 is a side sectional view of the dishwasher according to Embodiment 1 of the present invention;
3 is a configuration diagram of a plurality of flow paths connected to the fountain mechanism of the dish washing machine according to the first embodiment of the present invention;
4 is a flowchart of the dish washing machine according to the first embodiment of the present invention;
5 is an assembled view of the turbidity detection unit of the dish washing machine according to the first embodiment of the present invention;
6 is a cross-sectional view of the turbidity detection unit of the dish washing machine according to the first embodiment of the present invention;
7 is a block diagram of a control system of the dish washing machine according to the first embodiment of the present invention;
8 is an explanatory diagram of detection results of a turbidity detection unit in a washing step of the dish washing machine according to the first embodiment of the present invention;
9 is a flow chart in a washing step and a rinsing step of the dish washing machine according to the first embodiment of the present invention;
10 is another flow chart in the washing step and the rinsing step of the dish washing machine according to the first embodiment of the present invention;
11 is another flow chart in the washing step and the rinsing step of the dish washing machine according to the first embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the dishwasher which concerns on embodiment of this invention is demonstrated, referring drawings. In the following description, the liquid used for washing | cleaning and rinsing of to-be-cleaned objects, such as tableware, is called washing water.

(1) composition of the dishwasher

1 and 2 are main part broken front and side cross-sectional views showing the configuration of the dish washing machine according to the first embodiment of the present invention. In the main part broken front view of FIG. 1, a part of the front surface of the dish washing machine 1 is cut | disconnected and shown.

As shown in FIG. 1 and FIG. 2, the dishwasher 1 includes a housing 1a. The door 16 (FIG. 2) which can be opened and closed is provided in the front surface of the housing 1a. A portion of the door 16 is provided with a window portion 16a (FIG. 2). The cleaning tank 2 for cleaning the to-be-cleaned object 10, such as tableware, is provided in the housing 1a.

In the upper end part of the washing tank 2, the upper dish basket 8 is provided so that the movement to the front-back direction is possible. The upper dish basket 8 has a left accommodating part 8a provided in one side surface side of the washing tank 2, and a right accommodating part 8b provided in the other side surface side of the washing tank 2; . The left accommodating part 8a is provided in the position lower than the right accommodating part 8b.

At the lower end of the washing tank 2, the lower dish basket 9 is provided to be movable in the front-back direction. The lower side dish basket 9 has the left accommodating part 9a provided in one side surface side of the washing tank 2, and the right accommodating part 9b provided in the other side surface side of the washing tank 2. . The left accommodating part 9a and the right accommodating part 9b are provided in the same height. The various objects to be cleaned 10 are disposed on the left side receiving portion 8a and the right side receiving portion 8b of the upper dish basket 8 and the left side receiving portion 9a and the right receiving portion 9b of the lower side dish basket 9. ) Is accepted.

On the back of the cleaning tank 2, a substantially cross-shaped fixed cleaning nozzle 5 is disposed as the cleaning portion. The fixed cleaning nozzle 5 has the vertical nozzle part 5a extended in an up-down direction, and the horizontal nozzle part 5b extended in the horizontal direction from the substantially center of the vertical nozzle part 5a. At the upper end of the vertical nozzle part 5a, the bending part 5c which bends in the horizontal direction toward the other side surface of the washing tank 2 is formed. A plurality of liquid injection holes 20a are formed in the bent portion 5c. Moreover, the turbidity detection part 60 is provided directly above the upper end of the vertical nozzle part 5a. The detail of the turbidity detection part 60 is mentioned later.

On one side of the cleaning tank 2, a water pipe 6 is attached so as to extend forward from the horizontal nozzle portion 5b of the fixed cleaning nozzle 5. At the tip of the water pipe 6, the rotary cleaning nozzle 7 is rotatably mounted around the vertical axis. The rotary cleaning nozzle 7 has wings extending in one direction and in the opposite direction from the center of rotation, and a plurality of liquid injection holes (not shown) are formed on the upper surface of these wings. The rotary cleaning nozzle 7 is disposed below the left container 8a of the upper dish basket 8. Moreover, the some liquid injection port 20b is formed in the horizontal nozzle part 5b in the other side surface side of the washing tank 2. As shown in FIG.

At the bottom of the washing tank 2, the rotary washing nozzles 3 and 4 are rotatably mounted around the vertical axis. Each of the rotary cleaning nozzles 3 and 4 has a wing portion extending in one direction and a reverse direction from the center of rotation similarly to the rotary cleaning nozzle 7, and a plurality of liquid injection ports (not shown) are provided on the upper surface of these wing portions. Formed. The rotary cleaning nozzle 3 is disposed below the left container 9a of the lower dish basket 9, and the rotary cleaning nozzle 4 is disposed below the right container 9b of the lower dish basket 9. do. In addition, the rotary nozzles 3, 4 and 7 are also examples of the cleaning unit. As shown in FIG. 2, a storage portion for temporarily storing the washing water used for washing or rinsing the object to be cleaned 10 on the front side of the washing tank 2 below the lower dish basket 9 ( 12) is formed.

One end of the water supply pipe 31 is connected to the lower end vicinity of the back surface of the washing tank 2. The water supply pipe 31 extends to the outside of the housing 1a, and the other end thereof is connected to a water pipe (not shown). In the housing 1a, the water supply pipe 31 is provided with a water supply valve 31a. By opening the water supply valve 31a, tap water is introduced into the washing tank 2 as the washing water. The washing water introduced into the washing tank 2 is stored in the storage 12.

In the reservoir 12, a heater 14 for heating the stored washing water and for heating the air inside the washing tank 2 is disposed. Moreover, the temperature sensor 17 is provided in the outer wall of the bottom face of the washing tank 2. The temperature sensor 17 indirectly detects the temperature of the washing water stored in the reservoir 12 and the temperature of the air inside the washing tank 2 via the outer wall of the bottom face of the washing tank 2.

A drain port 12a is formed at the bottom of the reservoir 12. Directly above the drain port 12a, a remnant filter 13 for collecting a remnant removed from the object to be cleaned 10 is detachably attached. In addition, in this embodiment, a remainder refers to the solid substance in the contaminant removed from the to-be-cleaned substance 10 by washing | cleaning or rinsing.

The washing water induction lead-out part G is formed in the lower part of the drain port 12a. The pump 11 is connected to the washing water induction derivation part G via the piping 11a. Thereby, the internal space of the pump 11 and the internal space of the washing | cleaning water introduction | transduction lead part G communicate. The pump 11 is equipped with a drain pipe 32 and a water fountain mechanism 15 extending out of the housing 1a. In this embodiment, a reversible rotary pump can be used as the pump 11. The drain pipe 32 has a trap structure (not shown).

A drying mechanism 72 is provided on the side of the pump 11. The drying mechanism 72 includes a fan or the like, for example, passes through an air inlet tube (not shown), and supplies air to the inside of the cleaning tank 2 from the rear surface of the cleaning tank 2. Thereby, airflow generate | occur | produces in the space inside the washing tank 2 in the drying step of the to-be-cleaned object 10 mentioned later.

A plurality of flow paths are connected to the fountain mechanism 15 described above. These multiple flow paths are demonstrated. FIG. 3 is a diagram illustrating a plurality of flow paths connected to the fountain mechanism 15 of FIG. 2, and is a front view.

As shown by the dashed-dotted line in FIG. 3, the first, second, third and fourth flow paths Ra, Rb, Rc, and Rd are connected to the fountain mechanism 15. The first flow path Ra connects the fountain mechanism 15 and the rotary cleaning nozzle 3. This 1st flow path Ra is used in order to supply the washing | cleaning water inside the fountain mechanism 15 to the rotating washing nozzle 3.

The second flow path Rb connects the fountain mechanism 15 and the rotary cleaning nozzle 4. The second flow path Rb is used to supply the washing water inside the fountain mechanism 15 to the rotary washing nozzle 4.

The third flow path Rc is formed inside the fixed cleaning nozzle 5. Specifically, the third flow path Rc passes through the vertical nozzle part 5a of the fixed cleaning nozzle 5 and connects the fountain mechanism 15 and the turbidity detection part 60. Moreover, the 3rd flow path Rc passes through the vertical nozzle part 5a and the bent part 5c of the fixed washing | cleaning nozzle 5, and connects the fountain mechanism 15 and the some liquid injection port 20a. Moreover, the 3rd flow path Rc passes through the vertical nozzle part 5a of the fixed washing | cleaning nozzle 5, and the horizontal nozzle part 5b of the washing tank 2, and the fountain mechanism 15 and several liquid injection ports are carried out. 20b is connected. The third flow path Rc is used to supply the washing water inside the fountain mechanism 15 to the plurality of liquid injection ports 20a and 20b of the turbidity detection unit 60 and the fixed cleaning nozzle 5.

The fourth flow path Rd is also formed inside the fixed cleaning nozzle 5. Specifically, the fourth flow path Rd is the fountain mechanism 15 through the vertical nozzle portion 5a of the fixed washing nozzle 5, the horizontal nozzle portion 5b of the washing tank 2, and the water pipe 6. And the rotary cleaning nozzle 7 are connected. This fourth flow path Rd is used to supply the washing water inside the fountain mechanism 15 to the rotary washing nozzle 7.

The valve body is provided inside the fountain mechanism 15. In the present embodiment, the valve body selectively communicates the internal space of the fountain mechanism 15 to any one of the first to fourth flow paths Ra to Rd in accordance with the operation of the pump 11.

Specifically, the valve main body, when the motor of the pump 11 is stopped from the state in which the motor of the pump 11 is stopped to move to a state that rotates in one direction, the internal space of the water fountain mechanism 15 and the first to The communication state with the fourth flow paths Ra to Rd is switched. As a result, when the motor of the pump 11 intermittently rotates in one direction, each time the pump 11 operates from the stopped state, the first, second, third and fourth flow paths Ra, Rb, Rc and Rd communicate with the internal space of the fountain mechanism 15 in this order.

In the dishwasher 1, when washing or rinsing the object to be cleaned 10 is performed first, the water supply valve 31a is opened to pass through the bottom surface of the cleaning tank 2 from the water supply pipe 31. Then, the washing water (tap water) is supplied into the reservoir 12.

After a predetermined amount of washing water is stored in the reservoir 12, the motor of the pump 11 rotates in one direction. As a result, the washing water stored in the reservoir 12 is sucked by the pump 11 and pumped into the water fountain mechanism 15. In the water fountain mechanism 15, the washing water pumped from the pump 11 is selectively supplied to any one of the first to fourth flow paths Ra to Rd by the valve body.

When the washing water is supplied to the first flow path Ra, the washing water is sprayed from the liquid injection port of the rotary washing nozzle 3 toward the object 10 to be accommodated in the left receiving portion 9a of the lower dish basket 9. When the washing water is supplied to the second flow path Rb, the washing water is sprayed from the liquid injection port of the rotary washing nozzle 4 toward the object 10 to be accommodated in the right receiving portion 9b of the lower dish basket 9. When the washing water is supplied to the fourth flow path Rd, the washing water is injected from the liquid injection port of the rotary washing nozzle 7 toward the object 10 to be housed in the left receiving portion 8a of the upper dish basket 8.

When the washing water is injected from the rotary washing nozzles 3, 4, 7, the rotary washing nozzles 3, 4, 7 rotate around the vertical axis due to the reaction force acting on the blades in accordance with the injection of the washing water. As a result, the spraying direction of the washing water from the rotary washing nozzle 4 to the object to be cleaned 10 is continuously changed.

When the washing water is supplied to the third flow path Rc, from the liquid injection ports 20a and 20b of the fixed washing nozzle 5 toward the object to be cleaned 10 accommodated in the right receiving portion 8b of the upper dish basket 8. Washing water is sprayed. In addition, the washing water is supplied to the turbidity detection unit 60, and the turbidity of the washing water is detected. Details will be described later.

In the above dishwasher 1, when the washing or rinsing of the object to be cleaned 10 is completed, the motor of the pump 11 rotates in the reverse direction. As a result, the washing water stored in the reservoir 12 and the washing water remaining in the water fountain mechanism 15 are sucked by the pump 11 through the drain port 12a and the washing water introduction-inducing part G, and the drain pipe It discharges to the exterior of the washing tank 2 through the 32.

(2) Overview of operation of the dishwasher

The operation | movement outline of the dishwasher 1 is demonstrated. 4 is a flowchart showing an outline of the operation of the dishwasher 1.

As shown in FIG. 4, firstly, the washing water remaining in the washing tank 2 is discharged, and the water supply valve 31a is opened, so that tap water is introduced into the storage 12 from the water supply pipe 31. It is supplied (step S1: drainage / water supply step).

Next, the detergent is dissolved in the tap water supplied into the washing tank 2, so that the washing water can be obtained. The washing water is pumped into the first to fourth flow paths Ra to Rd by the pump 11. In this way, the washing water is injected from the rotary washing nozzles 3, 4, 7 and the fixed washing nozzle 5 to the object to be cleaned 10, and the object to be cleaned 10 is washed (step S2: cleaning). step).

In this case, the washing water sprayed on the object to be cleaned 10 flows into the reservoir 12 via the wall surface of the washing tank 2 and the like, and is again stored in the reservoir 12. The washing water stored in the reservoir 12 is again pumped by the pump 11 into the first to fourth flow paths Ra to Rd, and the object to be cleaned is removed from each nozzle 3, 4, 5, 7. Sprayed to (10). Thus, at the time of washing | cleaning the to-be-cleaned object 10, the wash water circulates inside the washing tank 2. As shown in FIG. In addition, each nozzle points out the rotation washing nozzle 3, 4, 7 and the fixed washing nozzle 5 generically.

When the cleaning of the object to be cleaned 10 is completed, the washing water used for cleaning the object to be cleaned 10 is discharged through the drain pipe 32 by the pump 11. Thereafter, the water supply valve 31a is opened, and the tap water is again supplied to the storage 12 of the cleaning tank 2 (step S3: drainage / water supply step).

Next, the tap water supplied into the washing tank 2 is pumped into the first to fourth flow paths Ra to Rd by the pump 11 as washing water. As a result, washing water is injected from the nozzles 3, 4, 5, and 7 to the object to be cleaned 10, and rinsing of the object to be cleaned 10 is performed (step S4: rinsing step).

When the rinsing of the object to be cleaned 10 is completed, the washing water used for the rinsing is discharged through the drain pipe 32 by the pump 11. Thereafter, the water supply valve 31a is opened, and the tap water is again supplied to the storage 12 of the cleaning tank 2 (step S5: drainage / water supply step).

Next, by operating the heater 14, the tap water stored in the storage 12 is heated to a predetermined temperature. Thereafter, the heated tap water is pumped into the first to fourth flow paths Ra to Rd by the pump 11 as washing water. In this way, the washing water heated at the predetermined temperature is sprayed from the nozzles 3, 4, 5, 7 to the object to be cleaned 10, and the heating and rinsing of the object to be cleaned 10 are performed (step S6: rinsing). step). In this case, the object to be cleaned 10 can be sterilized by heat. Moreover, since the temperature of the to-be-cleaned object 10 rises with heat, the drying efficiency of the to-be-cleaned object 10 can be improved in a subsequent drying step.

When the heating rinsing of the object to be cleaned 10 is completed, the washing water used for the heating rinsing is discharged through the drain pipe 32 by the pump 11 (step S7: drainage step).

Finally, the operation of the pump 11 is stopped, and the drying mechanism 72 operates. The drying mechanism 72 generates airflow in the interior space of the washing tank 2. As a result, the air heated to the predetermined temperature by the heater 14 circulates inside the washing tank 2. The to-be-cleaned object 10 is dried by heated air (step S8: drying step). When drying of the to-be-cleaned object 10 is completed, a series of operation | movement in the dishwasher 1 is complete | finished.

In addition, although it is not mentioned above, in fact, also in the washing | cleaning step of step S2, washing water is heated by the heater 14 to predetermined temperature. On the other hand, in the rinsing step of step S4, the washing water is not heated by the heater 14 in many cases. However, when the washing conditions are adjusted, the washing water may be heated to a predetermined temperature by the heater 14 even in the rinsing step of step S4.

During the series of operations described above, the number of times of the drainage / water supply step of step S1 and the washing step of step S2, and the number of times of the drainage / water supply step of step S3 and the rinsing step of S4 is detected by the turbidity detection unit 60. The turbidity can be changed accordingly. In addition, in the washing step S2 and the rinsing step S4, the temperature of the washing water and the washing time or the rinsing time can be appropriately changed in accordance with the turbidity of the washing water detected by the turbidity detection unit 60. The control of the dishwasher 1 according to the turbidity of the washing water will be described later.

(3) The details of turbidity detection part

Details of the haze detection unit 60 will be described. 5 is an assembly view of the haze detection unit 60. 6 is a cross-sectional view of the turbidity detection unit 60 cut longitudinally.

5 and 6, the turbidity detection unit 60 mainly includes a lower cover 610, a packing 620, a sensor accommodating cover 630, a sensor support case 640, an upper cover 650, and a print. It consists of the board | substrate 64P, the optical sensor 64, and turbidity detection nozzle 5x. The lower cover 610 constitutes a part of the ceiling surface in the cleaning tank 2 of FIG. 1. In other words, the ceiling surface of the cleaning tank 2 is formed so that a part thereof may protrude downward. An opening 611 is formed in the center of the lower cover 610. In the lower cover 610, two screw holes 612 are formed close to the opening 611.

As a material of the back surface, the side surface, the bottom surface, and the ceiling surface (respectively, the right side, inner side, lower surface, and upper surface of the washing tank 2 in FIG. 2), the polypropylene which has light-shielding property, for example (PP) resin is used. Moreover, polypropylene resin is used also as a material of the part except the window part 16a of the door 16 which comprises the front surface of the washing tank 2 (left side surface of the washing tank 2 in FIG. 2). On the other hand, as a material of the window part 16a of the door 16, polymethyl pentene (PMP) resin which has a translucency is used. Thereby, the user of the dishwasher 1 can confirm the inside of the washing tank 2 from the window part 16a of the door 16. As shown in FIG.

At the time of assembling the turbidity detection unit 60, the packing 620 may be mounted to conform to the inner edge of the opening 611 of the lower cover 610. In this state, the sensor accommodating cover 630 having a substantially double shape is fitted to the opening 611 of the lower cover 610 via the packing 620. As a material of the sensor accommodating cover 630, for example, polymethylpentene resin can be used. In this case, the sensor accommodating cover 630 is transparent.

In the center portion of the sensor accommodating cover 630, an accommodating space 630S is formed for accommodating the sensor support case 640. In addition, two through holes 639 are formed in the sensor accommodating cover 630 close to the accommodating space 630S.

With the sensor accommodating cover 630 fitted to the lower cover 610, it passes through the two through holes 639 of the sensor accommodating cover 630 and into the two screw holes 612 of the lower cover 610. The screw N can be mounted. Thereby, the sensor accommodating cover 630 is fixed to the lower cover 610 reliably. In addition, the watertightness between the sensor accommodating cover 630 and the lower cover 610 is ensured by the packing 620. As shown in FIG. 6, the concave-shaped part 631 of the cross section rectangle concave upward is formed in the center of the bottom face of the sensor accommodating cover 630 which forms the accommodating space 630S.

The sensor support case 640 is equipped with a printed board 64P and an optical sensor 64. In this embodiment, a transmissive optical sensor can be used as the optical sensor 64. The optical sensor 64 includes a light emitting element 64a made of a light emitting diode and a light receiving element 64b made of a photodiode. The terminals of the light emitting element 64a and the light receiving element 64b are connected to the printed board 64P.

The sensor support case 640 on which the printed board 64P and the optical sensor 64 are mounted is accommodated in the accommodation space 630S of the sensor accommodation cover 630. In this state, the light emitting element 64a and the light receiving element 64b supported by the sensor support case 640 sandwich the concave portion 631 of the sensor accommodating cover 630 to face each other. In this way, the light emitting element 64a which is a light emitting part and the light receiving element 64b which is a light receiving part are arrange | positioned so as to oppose each other on the outer side of the side wall which opposes each other of the concave shape part 631.

The upper cover 650 is mounted to press the upper end of the sensor support case 640. As a result, the sensor support case 640 is positioned, and the sensor support case 640 is fixed to the sensor accommodating cover 630. Thereby, the light emitting element 64a and the light receiving element 64b are also positioned.

The upper surface of the upper cover 650 is in contact with the ceiling surface of the housing 1a covering the cleaning tank 2. Thereby, each structural member of the turbidity detection part 60 is fixed reliably.

As shown in FIG. 6, the turbidity detection nozzle 5x extended in the perpendicular direction toward the turbidity detection part 60 is attached to the upper end of the fixed cleaning nozzle 5 of FIGS. At the tip of the turbidity detection nozzle 5x, a liquid injection port 20c for supplying the washing water to the turbidity detection unit 60 is formed. The internal space of the haze detection nozzle 5x constitutes a part of the third flow path Rc in FIG. 3.

The liquid injection port 20c at the tip of the turbidity detection nozzle 5x is positioned to face the concave portion 631 of the sensor accommodating cover 630. When the washing water is supplied to the third flow path Rc, the washing water is continuously discharged upward from the turbidity detection nozzle 5x. The washing water discharged to the concave portion 631 is sequentially discharged, but since the washing water is discharged continuously, the state in which the washing water is stored in the concave portion 631 is retained. That is, inside the concave portion 631, the washing water discharged from the turbidity detection nozzle 5x is stored while being sequentially replaced.

In this state, the optical sensor 64 is driven. As described above, the sensor accommodating cover 630 is transparent. Therefore, the light generated by the light emitting element 64a passes through the side wall of the concave portion 631 of the sensor accommodating cover 630 and the washing water stored in the concave portion 631, and receives the light receiving element 64b. ) Is received.

When the light emission amount of the light emitting element 64a is constant, the light reception amount of the light reception element 64b changes depending on the contaminant of the washing water stored in the concave portion 631, that is, the degree of clouding. For this reason, turbidity of the washing water is detected based on the voltage value of the light receiving signal output from the light receiving element 64b. When the supply of the washing water to the third flow path Rc is stopped, the washing water stored in the concave portion 631 flows downward through the inner circumferential surface thereof.

(4) Characteristics of the turbidity detector

In the dishwasher 1 which concerns on this embodiment, the turbidity detection part 60 is provided in the position higher than the highest water level of the wash water stored by the storage part 12. As shown in FIG. As a result, when the washing water is supplied to the flow paths Ra, Rb, and Rd other than the third flow path Rc, the turbidity detector 60 detects the turbidity of the washing water (concave portion 631). No washing water is in contact. In addition, when the washing water is discharged from the washing tank 2, the washing water does not remain in the turbidity detection portion (concave-shaped portion 631) of the washing water in the turbidity detection unit 60. Therefore, contaminants do not adhere to the turbidity detection unit 60 as in the prior art.

In addition, in the turbidity detection unit 60, contaminants such as residues and oils contained in the washing water may adhere to the detection portion of the turbidity of the washing water (concave-shaped portion 631). However, in this embodiment, since the washing water is sprayed from the liquid injection port 20c of the turbidity detection nozzle 5x toward the concave portion 631, the contaminants attached to the concave portion 631 are removed. That is, when the washing water is sprayed toward the concave portion 631, the effect of self cleaning is produced.

Therefore, contaminants such as scale and oil are prevented from adhering to the concave portion 631 of the sensor accommodating cover 630. As a result, the detection error of the turbidity of the washing water is reduced, and it becomes possible to detect the turbidity of the washing water accurately over a long period of time.

Moreover, since the turbidity detection part 60 is provided in the inside of the washing tank 2, a user's hand touches and maintenance is easy. Therefore, even if the concave portion 631 is contaminated, the contaminant can be easily removed.

On the other hand, when manufacturing the dishwasher 1, in order to confirm the operation | movement of the optical sensor 64, the optical sensor 64 is driven. Since the optical sensor 64 is arrange | positioned at both sides of the recessed part 631 of the ceiling surface of the washing tank 2, a manufacturing worker inserts a white paper etc. into the recessed part 631, and the optical sensor 64 You can check the presence or absence of light. For this reason, the operation | movement confirmation at the time of manufacture can be performed easily.

In the dishwasher 1 of this embodiment, the turbidity detection part 60 detects the turbidity of the wash water supplied to the 3rd flow path Rc. In the washing step and the rinsing step, it is possible to accurately detect the communication state between the internal space of the fountain mechanism 15 and the third flow path Rc based on the detection result of the turbidity detection unit 60. Details will be described later.

As described above, in the turbidity detection unit 60, the washing water is discharged from the turbidity detection nozzle 5x to the concave portion 631 of the sensor accommodating cover 630. By the washing water being stored in the concave portion 631, the turbidity of the washing water is detected by the optical sensor 64.

Here, the turbidity detection nozzle 5x is disposed in the vertical direction, and the concave portion 631 is disposed so as to face the tip of the turbidity detection nozzle 5x. As a result, the bottom portion 632 of the concave portion 631 is horizontally widened and faces downward. In this state, when the washing water is discharged in the vertical direction from the turbidity detection nozzle 5x to the concave portion 631, almost uniform water pressure is applied to the bottom portion 632 of the concave portion 631. As a result, when bubbles are mixed in the washing water introduced into the concave portion 631, the bubbles are uniformly extruded downward from the concave portion 631 by hydraulic pressure. For this reason, in the case where the washing water is continuously discharged to the concave portion 631, most of the gaseous phase, such as air bubbles, remains in the concave portion 631. That is, since no gaseous phase exists in the washing water introduced between the light emitting element 64a and the light receiving element 64b, the detection error of turbidity of the washing water is reduced.

When the turbidity detection nozzle 5x is disposed in the horizontal direction and the sensor accommodating cover 630 is disposed such that the concave portion 631 faces the front end of the turbidity detection nozzle 5x, the turbidity detection nozzle 5x is disposed in the concave portion 631. When the washing water is discharged from the turbidity detection nozzle 5x, the pressure applied to the bottom portion 632 along the vertical direction of the concave portion 631 is less likely to be uniform due to the effect of gravity. For this reason, when bubbles are mixed in the washing water introduced into the concave portion 631, the bubbles may move upward and stay inside the concave portion 631.

Therefore, the turbidity detection nozzle 5x and the sensor accommodating cover 630 have a sensor such that the turbidity detection nozzle 5x is disposed in the vertical direction and the concave portion 631 faces the tip of the turbidity detection nozzle 5x. It is preferable that the accommodation cover 630 is disposed. This reduces the detection error of turbidity as described above.

In addition, when the bubble mixed in washing water does not affect the detection error of turbidity most, the turbidity detection nozzle 5x is arrange | positioned in the horizontal direction, and the sensor accommodating cover 630 has the concave part 631 for turbidity. You may arrange so that it may oppose the front-end | tip of the detection nozzle 5x. The turbidity detection nozzle 5x may be disposed to be inclined with respect to the vertical direction, and the sensor accommodating cover 630 may be disposed so that the concave portion 631 faces the front end of the turbidity detection nozzle 5x.

Also in this case, the turbidity detection unit 60 is provided at a position higher than the highest water level of the washing water stored in the storage unit 12, so that the washing water is a flow path Ra, Rb, Rd other than the third flow path Rc. ), The washing water does not contact the concave portion 631. Further, even when the washing water is discharged from the washing tank 2, the washing water does not remain in the concave portion 631. Therefore, contaminants such as scale and oil are prevented from adhering to the concave portion 631 of the sensor accommodating cover 630.

As above-mentioned, the window part 16a of the door 16 which comprises the front surface of the washing tank 2 is transparent. As a result, external light enters the cleaning tank 2 from the window portion 16a while the door 16 is closed. In this case, when the turbidity of the washing water is detected, the detection accuracy of the optical sensor 64 may decrease due to disturbance light.

On the other hand, in the turbidity detection unit 60, the concave portion 631 in which the turbidity of the washing water is detected is surrounded by the lower cover 610. As described above, the lower cover 610 constitutes a part of the ceiling surface of the cleaning tank 2, and the ceiling surface has light shielding properties.

As a result, even when external light enters the inside of the cleaning tank 2 while the door 16 is closed, the light is forced into the concave portion 631 inside the lower cover 610. Is prevented. That is, the lower cover 610 is an example of the light blocking wall portion. As a result, the fall of the detection accuracy of the optical sensor 64 by the disturbance light is prevented at the time of detection of the turbidity of wash water.

When the inner surface of the concave portion 631 of the sensor accommodating cover 630 that receives the washing water has waterproofness, when the discharge of the washing water from the turbidity detection nozzle 5x to the concave portion 631 ends, the concave shape Washing water easily adheres to the inner surface of the section 631 as droplets. When the droplets adhered to the inner surface of the concave portion 631 are dried, contaminants contained in the droplets are unevenly attached to the inner surface of the concave portion 631. In this case, the inner surface of the concave portion 631 is unevenly soiled, so that the detection of turbidity by the optical sensor 64 becomes unstable.

Therefore, it is preferable that the surface of the recessed part 631 of the sensor accommodating cover 630 which receives washing water has hydrophilicity. For example, a hydrophilic resin is coated on the inner surface of the concave portion 631.

In this case, when the discharge of the washing water from the turbidity detection nozzle 5x to the concave portion 631 is completed, the washing water is prevented from adhering to the inner surface of the concave portion 631 as droplets. This prevents non-uniform contamination from adhering to the inner surface of the concave portion 631. As a result, whenever the detection of the turbidity of the washing water is performed, the detection accuracy of the turbidity is prevented from being lowered by the droplets attached to the concave portion 631.

(5) the control system of the dishwasher

Next, the control system of the dish washing machine 1 according to the present embodiment will be described. 7 is a block diagram showing the configuration of the control system of the dish washing machine 1.

As shown in FIG. 7, the dishwasher 1 includes a control unit 70. The control unit 70 includes a central processing unit (CPU) 70a, a memory 70b, and a timer 70c. The turbidity detection unit 60, the temperature sensor 17, the water supply valve 31a, the pump 11, the heater 14, and the drying mechanism 72 are connected to the control unit 70.

The control part 70 is based on the turbidity of the washing water and the temperature of the washing water or the temperature inside the washing tank 2, the water supply valve 31a, the pump 11, the heater 14 and the drying mechanism 72 Control the operation of Here, as the turbidity of the washing water, the detection value which is a detection result by the turbidity detection unit 60 is used. In addition, as a temperature of washing water or the temperature of the inside of the washing tank 2, the detection value which is a detection result by the temperature sensor 17 is used. In addition, the detection value of the turbidity detection part 60 and the detection value of the temperature sensor 17 are normally voltage values.

(6) Detection example of turbidity of washing water

In the following description, the area | region corresponding to the left side accommodating part 9a of the lower side dish basket 9 among the insides of the washing tank 2 in FIG. 1 is called the washing | cleaning area A, and the lower side dish basket 9 The area | region corresponding to the right side accommodating part 9b is called washing area | region B, and the area | region corresponding to the right side accommodating part 8b of the upper side dish basket 8 is called washing area C, and the upper side dish basket 8 The area | region corresponding to the left accommodating part 8a of () is called washing area | region D (refer FIG. 3).

In the washing step and the rinsing step, the CPU 70a rotates the motor of the pump 11 in one direction, for example, and temporarily stops the motor of the pump 11 every 30 seconds. As a result, the washing water is sequentially supplied to the first, second, third, and fourth flow paths Ra, Rb, Rc, and Rd, and the washing regions A, B, C, and D are sequentially rotated every 30 seconds. Washing water is sprayed. Therefore, in this example, washing or rinsing of the object to be cleaned 10 in the cleaning areas A, B, C, and D is performed in two minutes.

The dishwasher 1 of this embodiment determines which washing | cleaning area | region of the washing | cleaning area | region A, B, C, D is wash | cleaned from the detection result of the turbidity of wash water. Below, an example is demonstrated about the detection result of the turbidity of wash water in a washing | cleaning step.

8 is an explanatory diagram showing an example of a detection result of the turbidity detection unit 60 in the washing step. In Fig. 8, the vertical axis represents the detection value (voltage value in this example) of the turbidity of the washing water by the turbidity detection unit 60, and the horizontal axis represents time. In addition, in this example, the detection value by the turbidity detection part 60 becomes low, so that the turbidity of wash water is high.

As shown in FIG. 8, the detected value of the turbidity of the washing water is, respectively, from the time point t0 to the time point t1, from the time point t2 to the time point t3, and after the time point t4, respectively. It remains almost constant. Further, the fluctuation is greatly reduced in the period from the time point t1 to the time point t2 and the time period from the time point t3 to the time point t4.

Here, in the dish washing machine 1, washing water is sequentially supplied to the first, second, third and fourth flow paths Ra, Rb, Rc, and Rd as described above. Therefore, in the period in which the washing water is not supplied to the third flow path Rc, the washing water does not exist inside the concave portion 631 of FIG. For this reason, the detection value by the turbidity detection part 60 is kept substantially constant.

As a result, when the detection result shown in FIG. 8 is obtained, the period in which the detection value by the turbidity detection unit 60 greatly decreases (in this example, the period and the time point t3 from the time point t1 to the time point t2). It can be determined that the washing water is injected into the washing region C by passing through the third flow path Rc at the time period t4). In this way, the washing water is sequentially supplied to the plurality of washing nozzles (rotating washing nozzles 3, 4, 7 and fixed washing nozzle 5) serving as washing units. The turbidity of the washing water supplied to the fixed washing nozzle 5 which is at least one washing nozzle among the plurality of washing nozzles is detected, and the timing at which the washing water is supplied to the fixed washing nozzle 5 which is the at least one washing nozzle is determined. Doing.

In the above description, the detection result of the turbidity of the washing water in the washing step has been described, but almost the same detection result can be obtained even in the rinsing step. Therefore, even in the rinsing step, it can be determined that the washing water is injected into the washing region C in a period in which the detection value by the turbidity detecting unit 60 greatly decreases.

Here, the period during which the detection value by the turbidity detection unit 60 greatly decreases can be determined as described below, for example. In addition, in the following description, the period in which washing | cleaning or rinsing of the to-be-cleaned object 10 in the washing | cleaning area | region A, B, C, D is carried out is called 1 cycle period.

First, during the predetermined period as one cycle period, the detection value of the turbidity of the wash water is sampled at a fixed time interval, and the average value of the detected values sampled at the end of the one cycle period is calculated. In the next one cycle period, it is determined whether the detected value of the turbidity of the washing water is high or low with respect to the average value Av (the dashed dashed line in FIG. 8) calculated at the end of the immediately preceding one cycle period. Thereby, when the detection value of the turbidity of wash water is more than average value Av, it can be determined that wash water is not sprayed in the washing | cleaning area | region C. As shown in FIG. On the other hand, when the detected value of the turbidity of the washing water is lower than the average value Av, it can be determined that the washing water is injected into the washing region C. That is, the timing at which the washing water is supplied to the fixed cleaning nozzle 5 based on this reference value is an average value Av calculated based on the turbidity of the washing water detected by the turbidity detecting unit 60 (variation in the following description). Period). The sampling process, the average value calculation process, and the discrimination process are performed in each cycle period. Thereby, the period by which the detection value by the turbidity detection part 60 falls significantly is detected.

(7) control example of the dishwasher

Hereinafter, the control example of the dishwasher 1 in a washing step and a rinsing step is demonstrated. In the following description, as described above, the period in which the detected value of the turbidity of the washing water by the turbidity detection unit 60 greatly decreases (for example, the period from the time point t1 to the time point t2 in FIG. 8). The period from the time point t3 to the time point t4) is called a variation period.

(7-a) Control Example 1

9 is a flowchart showing an example of control of the dish washing machine 1 in the washing step and the rinsing step. In this example, when the washing step or the rinsing step is started, the CPU 70a starts the detection of the turbidity of the washing water by the turbidity detection unit 60 (step S11). In addition, the CPU 70a starts the intermittent drive of the pump 11 (step S12). Here, the intermittent drive of the pump 11 rotates the motor of the pump 11 in one direction as described above, and temporarily rotates the motor of the pump 11 at regular time intervals (30 seconds in this example). It means to stop.

By intermittent driving of the pump 11, the washing water is sequentially supplied to the first to fourth flow paths Ra to Rd in FIG. 3, and the washing water is sprayed into the washing regions A to D in order. When the washing water is supplied to the third flow path Rc, the detection value of the turbidity of the washing water by the turbidity detection unit 60 greatly decreases.

On the basis of the detection value of the turbidity detection unit 60, the CPU 70a detects the above-described fluctuation period (YES in step S13), and stores the detected value of turbidity in the memory 70b in the fluctuation period ( Step S14). More specifically, for example, the CPU 70a stores, in the memory 70b, a detection value (lowest voltage value) showing the highest haze among the fluctuation periods as the detection value in the fluctuation period. In addition, in step S13, when CPU70a does not detect the above-mentioned fluctuation period (NO of step S13), it returns to the process of step S13.

The pump 11 is intermittently driven between step times (cleaning time or rinsing time) set in advance for each cleaning step or rinsing step. As a result, when the supply of the washing water to each of the flow paths Ra to Rd is performed in a single order, and the washing water is supplied to the third flow path Rc again, the detection value of the turbidity of the washing water by the turbidity detection unit 60 is increased again. Lowers.

As a result, when the CPU 70a detects the fluctuation period again based on the detection value by the turbidity detection unit 60 (YES in step S15), the detection value of the turbidity is stored in the memory 70b in the fluctuation period. At the same time, the detected value is compared with the detected value stored in the previous variation period (step S16). In the comparison process at step S16, the CPU 70a calculates the difference between these two detection values and assumes the amount of change in turbidity. In addition, in step S15, when the CPU 70a does not detect the above-mentioned fluctuation period (NO in step S15), the processing returns to step 15. Next, the CPU 70a determines whether or not the amount of change calculated in step S16 is equal to or less than a predetermined threshold value (step S17).

Here, it is considered that the amount of change in the turbidity of the washing water calculated each time the supply of the washing water to each of the flow paths Ra to Rd changes in accordance with the contaminants of the object to be cleaned 10. In other words, when the degree of contamination of the object to be cleaned 10 is large, the amount of change in turbidity of the wash water is also large, and when the degree of contamination of the object to be cleaned 10 is small, the amount of change in turbidity of the wash water is also small. It is thought to be losing.

When the amount of change is less than or equal to the threshold value, that is, when the degree of contamination of the object to be cleaned 10 is small (YES in step S17), the CPU 70a ends the detection of the turbidity of the washing water and stops the pump 11. By this, the washing step or the rinsing step is completed. On the other hand, when the amount of change is not below the threshold, that is, when the amount of change is larger than the threshold (NO in step S17), the CPU 70a returns to the process of step S15.

In the above control example, when the amount of change in turbidity is larger than a predetermined threshold value, that is, when the degree of contamination of the object to be cleaned 10 is large, the washing step or the rinsing step is performed again. Thereby, since the washing | cleaning time or the rinsing time are extended with the contamination of the to-be-cleaned object 10 in the inside of the washing tank 2, the to-be-cleaned object 10 is fully and reliably cleaned.

(7-b) Control Example 2

In the above control example 1, control is performed based on the difference between the detected value of the turbidity of the fluctuation period in one cycle period and the detected value of the turbidity of the fluctuation period in the next cycle period (that is, the amount of change in turbidity). In the control example 2, the control based on the amount of change of the detection value of turbidity during a fluctuation period is demonstrated. 10 and 11 are flowcharts illustrating another control example of the dish washing machine 1 in the washing step and the rinsing step. 10 and 11, the flows are connected via J and L in the figure.

In this example, when the washing step or the rinsing step is started, the CPU 70a starts the timer 70c (step S20) and starts the detection of the turbidity of the washing water by the turbidity detection unit 60 (step). S21). In addition, the CPU 70a starts the intermittent drive of the pump 11 (step S22).

Thereafter, as the washing water is supplied to the third flow path Rc as described above, the detection value of the turbidity of the washing water greatly decreases. Thus, when the CPU 70a detects the above-described fluctuation period based on the detection value of the haze detection unit 60 (YES in step S23), the memory 70b stores the detected value of the turbidity at the beginning of the fluctuation period. ) (Step S24).

Here, when the washing water is supplied to the third flow path Rc, the washing water may not be sufficiently stored in the concave portion 631 of FIG. 6. In this case, the detection value of the turbidity of the washing water becomes unstable. Therefore, when the fluctuation period is actually detected, the memory 70b uses the detected value of turbidity after a predetermined time (for example, about 2 seconds) has elapsed since the start of the fluctuation period as the detection value of the turbidity at the beginning of the fluctuation period. It is desirable to remember. In addition, in step S23, when the CPU 70a does not detect the above-mentioned fluctuation period (NO in step S23), the processing returns to step 23.

Subsequently, the CPU 70a stores the detection value (lowest voltage value) showing the highest haze during the variation period in the memory 70b as the detection value in the variation period (step S25). When the fluctuation period ends (the example of step S26), the CPU 70a compares the detection value of the turbidity at the beginning of the fluctuation period with the detection value indicating the maximum haze between the fluctuation period (step S27). In the comparison process in step S27, the CPU 70a calculates the difference between these two detection values, that is, the difference between the detection value showing the maximum turbidity between the detection value of the initial turbidity of the variation period and the variation period. It is called the change amount of turbidity. In addition, in step S26, when the fluctuation period does not end (NO in step S26), the processing returns to step 25.

Next, the CPU 70a determines whether or not the calculated change amount is equal to or less than a predetermined threshold value (step S28). When the amount of change is equal to or less than the threshold (YES in step S28), the CPU 70a determines whether or not the preset step time (wash time or rinse time) has elapsed based on the time measurement result of the timer 70c ( Step S29).

When the predetermined step time has elapsed (YES in step S29), the CPU 70a ends the detection of the turbidity of the washing water and stops the pump 11. This completes the washing step or the rinsing step. On the other hand, when the predetermined step time has not elapsed (NO in step S29), the CPU 70a returns to the process of step S23.

In the above step S28, when the amount of change is not equal to or less than the threshold, that is, when the amount of change is larger than the threshold (NO in step S28), the processing proceeds to step S31. In step S31, if the fluctuation period is detected again (YES in step S31), the CPU 70a temporarily sets the stop interval of the drive of the pump 11, that is, the interval from the stop of the drive of the pump 11 to the next stop. By prolonging, the drive time of the pump 11 is prolonged (step S32).

As a result, the time for the motor of the pump 11 to drive is temporarily increased. For this reason, the injection time of the washing water to the washing | cleaning area | region C becomes long compared with the injection time of the washing water to other washing | cleaning area | regions A, B, and D. Therefore, when the to-be-cleaned object 10 with a large degree of contamination exists in the washing | cleaning area | region C, according to the contamination of the to-be-cleaned object 10, a washing time or a rinsing time is extended. As a result, the object to be cleaned 10 inside the cleaning region C is sufficiently and reliably cleaned.

In addition, the process of step S32 advances to the process of step S29. On the other hand, in step S31, when the CPU 70a does not detect the variation period again (NO in step S31), the processing returns to step S31.

(8) effect

In this dishwasher 1, the turbidity detection part 60 is provided in the position higher than the highest water level of the wash water stored by the storage part 12. As shown in FIG. As a result, turbidity of the washing water flowing through the third flow path Rc is accurately detected over a long period of time.

In addition, by accurately detecting the turbidity of the washing water flowing through the third flow path Rc, the washing conditions or the rinsing conditions can be adjusted in the plurality of washing regions A to D based on the detection result. As a result, it becomes possible to perform appropriate washing due to the contamination of the object to be cleaned 10.

Moreover, based on the detection value of turbidity by the turbidity detection part 60, the amount of change in turbidity of the washing water can be calculated in one of the cleaning areas C among the plurality of cleaning areas A to D. Thereby, it becomes possible to individually adjust the washing | cleaning conditions or the rinsing conditions of one washing | cleaning area C among the some washing | cleaning area | regions A-D based on the calculated change amount. As a result, an appropriate and efficient cleaning can be performed in accordance with the arrangement state of the object to be cleaned 10 and the degree of contamination of the object to be cleaned 10 inside the cleaning tank 2.

As described above, in the washing step and the rinsing step, the washing water is sequentially supplied to the first, second, third and fourth flow paths Ra, Rb, Rc, and Rd. That is, the washing water discharged from the pump 11 is not classified into each flow path. Thereby, washing water can be supplied to each flow path Ra, Rb, Rc, and Rd with the maximum capability of the pump 11. As a result, the washing water can be sprayed to the washing areas A to D at a sufficiently high pressure, so that the washing object 10 can be cleaned more efficiently.

(9) Modification

In the control example 1 and the control example 2, the change amount of turbidity is calculated based on the detection result of the turbidity of the wash water detected by the turbidity detection unit 60, and the washing conditions or the rinsing conditions are adjusted based on the change amount. . Moreover, it is not limited to this, You may adjust washing | cleaning conditions or a rinse condition according to the degree of turbidity. For example, when the detected turbidity is high, the washing time or the rinsing time is adjusted to be long, and when the detected turbidity is low, the washing time or the rinsing time is shortened. Also in this case, the appropriate washing due to the contamination of the object to be cleaned 10 can be performed.

In the control example 1, the washing time or the rinsing time are adjusted based on the detection result of the turbidity of the washing water. In addition, the temperature of the washing water may be adjusted by the CPU 70a controlling the heater 14 based on the detection result of the turbidity of the washing water. In addition, the CPU 70a may increase or decrease the number of washing steps or rinsing steps based on the detection result of turbidity of the washing water. This makes it possible to perform more appropriate cleaning due to the contamination of the object to be cleaned 10.

Also in the control example 2, the washing | cleaning time or the rinsing time are adjusted in the washing | cleaning area | region C based on the detection result of the turbidity of wash water. The temperature of the washing water may be adjusted by controlling the heater 14 based on the detection result of the turbidity of the washing water, without being limited to this. This makes it possible to perform more appropriate cleaning due to the contamination of the object to be cleaned 10.

In the control example 2, the amount of change in turbidity of the washing water in the washing area C is calculated, and the washing time or the rinsing time in the washing area C is changed based on the calculated amount of change. In B and D), adjustment is performed independently of the washing time or the rinsing time. However, adjustment of washing time or rinsing time is not limited to this.

In addition, the cleaning area A is based on the detection value indicating the maximum turbidity stored in the step S25 by the CPU 70a and the detection value of the initial turbidity in the next variation detection period detected in the step S23 or the step S31. , B, D) may be adjusted for washing time or rinsing time. Thereby, according to the arrangement | positioning state of the to-be-cleaned object 10 and the contamination of the to-be-cleaned object 10 in the inside of the washing tank 2, it becomes possible to simultaneously and efficiently wash efficiently more appropriately.

In the dishwasher 1, one turbidity detection unit 60 corresponding to the third flow path Rc is provided. Not limited to this, a plurality of turbidity detection units 60 may be provided corresponding to the first to fourth flow paths Ra to Rd. In this case, based on the detection result of the turbidity of the washing water by the plurality of turbidity detection units 60, the washing conditions or the rinsing conditions can be individually adjusted for each of the washing regions A to D.

1: dishwasher 2: washing tank
3, 4, 5, 7: Nozzle 5x: Turbidity Detection Nozzle
8: top dish basket 9: bottom dish basket
10: To be cleaned 11: Pump
12 storage part 14 washing water heater
15: fountain mechanism 16: the door
20a, 20b: liquid injection port 32: drain pipe
60: turbidity detection unit 64: light sensor
70: control unit 70a: CPU
70b: memory 72: drying apparatus
630: sensor housing cover 631: concave

Claims (12)

A washing tank accommodating the object to be cleaned,
A washing unit for injecting washing water into the object to be cleaned,
A washing pump for pumping the washing water into the washing unit;
A storage portion provided inside the washing tank for storing the washing water;
A turbidity detection unit provided at a position higher than the highest water level of the washing water that can be stored in the storage unit inside the washing tank;
The turbidity detection unit detects the turbidity of the washing water supplied from the liquid injection port provided in the cleaning unit
dish washer. The method of claim 1,
The turbidity detection unit,
A concave portion provided to face the liquid injection port, the recess having a bottom portion receiving the washing water discharged from the liquid injection port and returning the liquid injection port;
And an optical sensor for detecting turbidity of the washing water based on the light passing through the washing water stored in the concave portion.
dish washer. The method of claim 2,
The concave portion has a translucent side wall,
The optical sensor has a light emitting portion for generating light and a light receiving portion for receiving light,
The light emitting portion and the light receiving portion are disposed so as to face each other on the outer side of the sidewalls facing each other.
dish washer. The method of claim 2,
The liquid injection port sprays the washing water upwards,
The concave portion has the bottom portion disposed downward
dish washer. The method of claim 2,
The turbidity detection unit further includes a light blocking wall portion provided to surround the concave portion and the optical sensor.
dish washer. The method of claim 2,
The inner surface of the concave portion has hydrophilicity
dish washer. The method of claim 1,
The cleaning unit has a fixed cleaning nozzle provided on the inner wall rear surface of the cleaning tank,
The turbidity detection unit detects the turbidity of the washing water supplied from the liquid injection port provided in the fixed cleaning nozzle.
dish washer. The method of claim 7, wherein
The fixed cleaning nozzle,
A turbidity detection nozzle provided at an upper end of the fixed cleaning nozzle and extending toward the turbidity detection unit;
The liquid injection port is provided at the tip of the turbidity detection nozzle.
dish washer. The method of claim 1,
The cleaning unit is composed of a plurality of cleaning nozzles,
Further provided with a fountain mechanism for sequentially switching the washing water supplied to the plurality of washing nozzles,
The turbidity detection unit detects the turbidity of the washing water supplied to at least one cleaning nozzle of the plurality of cleaning nozzles,
And a control unit for determining the timing at which the washing water is supplied to the at least one washing nozzle based on the turbidity of the washing water detected by the turbidity detecting unit and adjusting the washing conditions of the object to be cleaned.
dish washer. The method of claim 9,
The control unit calculates a reference value based on the turbidity of the washing water detected by the turbidity detecting unit in the period in which the washing water is supplied to the plurality of washing nozzles, and washes the at least one washing nozzle based on the reference value. To determine the timing at which water is supplied
dish washer. The method of claim 9,
The washing condition includes a washing time in which washing water is sprayed to wash the object to be cleaned.
dish washer. The method of claim 9,
The cleaning condition includes a number of times to wash the object to be cleaned by spraying the washing water.
dish washer.

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