JPH07322999A - Dish washer - Google Patents

Abstract

PURPOSE:To easily grasp the salt concentration in food with an electric conductivity measuring means in a dish washer washing the dishes stored in a washing tank. CONSTITUTION:Washing water is fed into a washing tank by a water feed valve 3, the washing water in the washing tank is circulated by a washing pump 5, the washing water sent by the washing pump 5 is heated by a heater 6 while being sprayed to dishes through a washing nozzle, and the washing water in the washing tank is discharged to the outside of the washing tank by a drain pump 7. The temperature of the washing water in the washing tank is detected by a temperature detecting means 8, and the water level of the washing water is detected by a water level detecting means 9. This dish washer is provided with an automatic detergent inserting device 11 automatically inputting a detergent, an electric conductivity measuring means 16 measuring the electric conductivity of food and washing water, and a control means 17 controlling a series of processes for washing, rinsing, and drying in sequence. The control means 17 displays the result measured by the electric conductivity measuring means 16 with a display means 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes stored in a washing tank.

[0002]

2. Description of the Related Art In recent years, interest in hygiene and health has increased, and it has become important to develop a product in consideration of hygiene and health in addition to the basic function of washing dishes in a dishwasher.

Conventionally, this type of dishwasher has been constructed as shown in FIGS. 7 and 8. The configuration will be described below.

As shown in FIG. 7, the washing tank 1 stores the dishes 2 and collects the washing water at the bottom to wash the dishes 2. The water supply valve 3 supplies tap water into the cleaning tank 1. Cleaning nozzle 4
Is fed with the washing water stored in the washing tank 1 by the washing pump 5 and sprays the washing water toward the tableware 2. The heater 6 heats the cleaning water in the cleaning tank 1. The drainage pump 7 discharges the cleaning water in the cleaning tank 1 to the outside of the cleaning tank 1. The temperature detecting means 8 detects the temperature of the cleaning water, and the water level detecting means 9 detects the water level of the cleaning water in the cleaning tank 1. The controller 10 controls operations of the water supply valve 3, the cleaning pump 5, the heater 6, the drainage pump 7, and the like. The automatic detergent depositing device 11 is for automatically depositing detergent into the cleaning tank 1. On the front surface of the control device 10, as shown in FIG. 8, operation means 12 and display means 13 are provided. Operating means 12
Is operated by the user to make a desired input, and the display means 13 displays the operating state.

To explain the operation of the above structure, first, when the user presses the start / temporary stop key 14 in the operating means 12, the operation is started and the pre-washing process is performed. After the water supply valve 3 is opened by the control device 10 and tap water is supplied to the bottom of the cleaning tank 1 until the water level detection means 9 detects a predetermined water level S1, the cleaning pump 5 is operated. The cleaning water is sprayed from the cleaning nozzle 4, and after cleaning the tableware 2, it is collected again at the bottom of the cleaning tank 1 and is repeated. The pre-washing process is performed for a predetermined time t1 without the heater 6 being energized, and the washing water temperature is room temperature.

After the washing water in the pre-washing process is discharged to the outside of the washing tank 1 by the drainage pump 7, the water supply valve 3 is opened again, and the water level detecting means 9 at the bottom of the washing tank 1 has a predetermined water level S1.
The tap water is supplied until it is detected. After that, the cleaning pump 5 is operated, the heater 6 is energized, and at the same time, the automatic detergent introducing device 11 is operated to start the main washing process. The washing water is heated and sprayed from the washing nozzle 4 to wash the dishes 2 and then collects again on the bottom of the washing tank 1, and this is repeated. The temperature detecting means 8 causes the predetermined washing water temperature T1 (about 5
0 ° C to 60 ° C) and the cleaning time is a predetermined time t2
After the passage of time, the cleaning pump 5 is stopped, the cleaning water is discharged to the outside of the cleaning tank 1 by the drainage pump 7, and the main cleaning process is completed.

After that, the water supply valve 3 is opened again, and tap water is supplied to the bottom of the cleaning tank 1 until the water level detection means 9 detects a predetermined water level S1. Then, the cleaning pump 5 is operated to perform the swishing process. To start. The cleaning water is sprayed from the cleaning nozzle 4, and after cleaning the tableware 2, it is collected again at the bottom of the cleaning tank 1 and is repeated. The step of washing the tin is performed three times, during which the heater 6 is energized, the temperature detecting means 8 detects the predetermined washing water temperature T3, and the washing time elapses the predetermined time t3, or the washing time elapses. Suzu washing is performed until a predetermined time t4 has passed.

After that, in the drying process, the blower fan is operated to discharge the steam in the cleaning tank 1 to the outside of the machine, and at the same time, the heater 6 is intermittently energized to heat the tableware 2 to remove water droplets adhering thereto. dry. The above-described series of operations are all controlled by the control device 10, and the progress of each step of prewashing, main washing, rinsing and drying is displayed by the display means 13.

[0009]

The conventional dishwasher as described above has only a basic function of removing dirt while having a very close relationship with eating habits, and the development in consideration of health is delayed. Had the problem. In addition, since the number of times of rinsing steps is constant regardless of the type of detergent, the amount of the detergent, and the water quality, there is a problem that rinsing cannot be properly performed under various cleaning conditions.

SUMMARY OF THE INVENTION The first object of the present invention is to solve the above problems and to make it possible to easily grasp the electric conductivity of food and wash water.

A second object is to grasp the amount of salt ingested from food and use it as a guideline for health management.

[0012] Also, soup such as miso soup or boiled soup of simmered food,
A third object is to make it possible to easily grasp the proper salt content for each menu such as Western style and Japanese style.

A fourth object is to eliminate waste in the rinsing process by performing rinsing based on the electric conductivity of the cleaning water in the rinsing process.

A fifth object is to perform efficient rinsing on the basis of the electric conductivity of the washing water in the main washing process, and to perform appropriate rinsing regardless of the water quality, the type of detergent, and the input amount. There is.

A sixth object is to provide an initialization course for measuring the electric conductivity of tap water, which is a standard for rinsing, so that a detergent amount suitable for the water quality can be added.

A seventh object is to perform appropriate rinsing on the basis of the electric conductivity of tap water regardless of the water quality, the type of detergent and the amount of the detergent added.

[0017]

In order to achieve the first object, the present invention circulates a cleaning tank, a water supply valve for supplying cleaning water into the cleaning tank, and circulation of cleaning water in the cleaning tank. Cleaning pump, a cleaning nozzle for spraying the cleaning water sent from the cleaning pump onto the dishes in the washing tank, a heater for heating the cleaning water in the cleaning tank, and the cleaning water in the cleaning tank. A drainage pump for discharging to the outside of the cleaning tank, a temperature detecting means for detecting the temperature of the cleaning water in the cleaning tank, a water level detecting means for detecting the water level of the cleaning water in the cleaning tank, and a detergent for automatically adding the detergent. An automatic charging device, food, electrical conductivity measuring means for measuring electrical conductivity of cleaning water, etc., display means, main washing, rinsing, control means for sequentially controlling a series of steps such as drying, The control means measures the electric conductivity measurement means. And a first means for solving problems that have to be displayed by the display means results.

Further, in order to achieve the second object, in addition to the first problem solving means, the display means includes a salt concentration display section for displaying the salt concentration, and the control means is the electrical conductivity measuring means. The second problem solving means is that the salt concentration in the food is displayed on the basis of the result of measurement by the salt concentration display unit.

Further, in order to achieve the third object, the control means of the first problem solving means has a display means for displaying the result measured by the electric conductivity measuring means step by step according to the kind of food for which the measurement is performed. The third problem solving means is to display by.

Further, in order to achieve the fourth object, the control means of the above-mentioned first problem solving means is based on the electric conductivity of the washing water in the rinsing process measured by the electric conductivity measuring means. The fourth problem solving means is that the rinsing process is performed a predetermined number of times.

In order to achieve the fifth object, the control means of the above-mentioned first problem solving means is such that the electric conductivity of the washing water in the main washing process and the electric conductivity of the washing water in the rinsing process are large. The fifth problem solving means is that the rinsing process is terminated when the ratio of R is less than or equal to a predetermined value.

In order to achieve the sixth object, in addition to the means for solving the above-mentioned first problem, the display means has a detergent amount display section for displaying the detergent amount, and the control means has an electric conductivity of tap water. A sixth object is to provide an initialization course for measuring the degree, and to display an appropriate detergent amount on the detergent amount display section based on the electrical conductivity of tap water measured by the electrical conductivity measuring means. It is a solution.

In order to achieve the seventh object, the control means of the first problem solving means is provided with an initialization course for measuring the electric conductivity of tap water, and the electric conduction is performed in the initialization course. The electrical conductivity of the wash water measured by the degree measuring means is memorized, and the rinsing process is terminated when the electrical conductivity of the rinsing water in the rinsing process matches the memorized electrical conductivity of the tap water. This is the means for solving the seventh problem.

[0024]

According to the first means for solving the above problems, the present invention provides:
The electric conductivity measuring means makes it possible to measure the electric conductivity of food and wash water.

In addition, since the salt concentration in the food is displayed based on the electric conductivity of the food measured by the electric conductivity measuring means by the second means for solving the problem, it is possible to grasp the amount of salt taken from the food. Can be used as a guide for health management.

In addition, since the salt concentration is displayed stepwise according to the type of food by the third means for solving the problem, the appropriate salt content for each menu such as miso soup or simmered simmered food, or Western style or Japanese style is displayed. It can be easily grasped.

According to the fourth means for solving the problems, when the electric conductivity of the washing water in the rinsing process reaches a predetermined value, the number of subsequent rinsing processes is determined.
It is possible to eliminate waste in the rinsing process.

By the fifth means for solving the problems, the rinsing process is performed until the ratio of the electric conductivity of the rinsing water in the main washing process to the electric conductivity of the rinsing water in the rinsing process is equal to or less than a predetermined value. Since this is performed, appropriate rinsing can be performed regardless of the water quality, the type of detergent, and the input amount.

According to the sixth means for solving problems, an initialization course for measuring the electric conductivity of tap water is provided, and a proper detergent is prepared based on the electric conductivity of the tap water measured by the electric conductivity measuring means. Since the amount is displayed, a detergent amount suitable for the water quality can be added.

Further, by the seventh means for solving the problems, the electric conductivity of tap water is stored, and the rinsing process is performed until the electric conductivity of the rinsing water in the rinsing process matches the electric conductivity of the tap water. Since this is performed, appropriate rinsing can be performed regardless of the water quality, the type of detergent, and the input amount.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 2 and 3, the electrode 15 is for measuring the electric conductivity, and is input to the electric conductivity measuring means 16 as shown in FIG. The electrical conductivity measuring means 16 measures the electrical conductivity of food and wash water from the potential difference of the electrode 15, and inputs the output to the control means 17 and the computing means 18. The calculating means 18 calculates the electric conductivity input from the electric conductivity measuring means 16 into a salinity concentration. The storage unit 19 stores the information sent from the control unit 17. The power switching means 20 is the control means 1
The output of 7 controls the energization of the cleaning pump 5, the drainage pump 7, the water supply valve 3, the heater 6, the automatic detergent feeding device 11, and the like.

The operating means 21 is operated by the user to make a desired input. As shown in FIG. 4, in addition to the drying time setting key, the course setting key, the start / pause key,
A salt key 22 is provided. The display unit 23 displays the operating state, and is provided with a salt concentration display unit 24. The control means 17 successively controls a series of steps such as main washing, rinsing and drying, and displays the result measured by the electric conductivity measuring means 16 on the display means 23. Incidentally, 25 is a power switch, and 26 is a commercial power source.

To explain the operation in the above-mentioned structure, first, when the user puts in a liquid food to the extent that the electrode 15 is submerged in the automatic detergent feeding device 11 and presses the salt key 22 of the operating means 21, the control means is activated. A command for measuring the electric conductivity is issued from 17, the electric conductivity measuring means 16 measures the electric conductivity from the potential difference between the electrodes 15, and the calculating means 18 calculates the salt concentration to display the salt concentration in the display means 23. The salt concentration in the food is displayed in the part 24. After that, as in the conventional example, prewashing, main washing, rinsing and drying steps are performed.

As described above, according to this embodiment, the electric conductivity measuring means 16 and the electrode 1 for measuring electric conductivity are provided.
5 and the calculation means 18 make it possible to measure the electric conductivity of food and show the salt concentration in the food to the user.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the display means 27 is provided with a salt concentration display section 28 for displaying the salt concentration, and the operating means 29 is provided with a menu key 30 for selecting a food menu. The control means 17 in FIG. 1 displays the salt concentration in the food on the salt concentration display part 28 based on the result measured by the electrical conductivity measuring means 16.

To explain the operation in the above configuration, first, the user puts a liquid food into the automatic detergent feeder 11 to the extent that the electrode 15 is immersed, and presses the menu key 30 to select the food menu. Next, when the salt key 22 of the operating means 29 is pressed, the control means 17 issues a command for measuring the electric conductivity, and the electric conductivity measuring means 16 causes the electrode 15 to move.
The electric conductivity is measured from the potential difference between them, the salt concentration is calculated by the calculating unit 18, and the information is input to the control unit 17. The control means 17 analyzes the inputted information based on the proper salt concentration for each menu which has been inputted in the storage means 19 in advance, and has five levels of strong taste, slightly strong taste, suitable salt, slightly light taste and light taste. Display the salt concentration with.

As described above, according to this embodiment, the storage means 19 stores the proper salt concentration for each type of food, and the degree of salt concentration of each food is displayed based on the stored salt concentration. It is possible to easily grasp the salt concentration for each dish.

Next, a third embodiment of the present invention will be described. The control means 17 in FIG. 1 performs subsequent rinsing steps a predetermined number of times based on the electric conductivity of the wash water in the rinsing steps measured by the electric conductivity measuring means 16. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described. First, the user operates the start / pause key 1 of the operating means 21.
Pressing 4 will start the operation. After the pre-washing process and the main washing process are performed in the same manner as the conventional example, the rinsing process is started. When the rinsing process is started, the control means 17 issues a command for measuring the electric conductivity, and the electric conductivity measuring means 16 measures the electric conductivity of the washing water by the potential difference of the electrode 15. When the electric conductivity of the wash water reaches the predetermined value A1, the control means 17 determines the number of subsequent rinsing strokes.

As described above, according to the present embodiment, the number of rinsing strokes is determined based on the electric conductivity of the washing water in the rinsing stroke, so that the next step of drying is performed with insufficient rinsing. It is possible to prevent the process from progressing.

Next, a fourth embodiment of the present invention will be described. The control means 17 in FIG. 1 ends the rinsing process when the ratio of the electrical conductivity of the rinsing water in the main washing process to the rinsing water electrical conductivity in the rinsing process is below a predetermined value. . The other structure is the same as that of the first embodiment.

To explain the operation of the above configuration, first, the user starts / pauses the key 1 of the operating means 21.
Pressing 4 will start the operation. The pre-washing process is performed in the same manner as the conventional example, and then the main-washing process is started. When the main washing process is started, the automatic detergent depositing device 1 is passed through the power switching means 20 according to a command from the control means 17.
1, operations of the cleaning pump 5, the heater 6, the water supply valve 3, etc. are started. The main washing process is carried out until a predetermined time t1 has elapsed from the start and the temperature detecting means 8 detects a predetermined washing water temperature T1. During that time, the detergent is sufficiently melted t2.
The electric conductivity A2 of the subsequent washing water is measured by the electric conductivity measuring means 16 according to the command of the control means 17 by the potential difference of the electrode 15, and is stored in the storage means 19. After that, the process of rinsing is started.

When the rinsing process is started, the control means 17 issues an instruction to measure the electric conductivity again, and the electric conductivity measuring means 16 measures the electric conductivity A3 of the washing water by the potential difference of the electrode 15. To do. The ratio of the electric conductivity A3 in the rinsing process to the electric conductivity A2 in the main cleaning process stored in the storage means 19, that is, A3 / A
When 2 becomes equal to or less than the predetermined value P, the rinsing process is finished by the control means 17.

The predetermined value P is set to 1/500 in this embodiment, though it varies depending on the dirt and water quality adhering to the tableware.

As described above, according to this embodiment, since the rinsing step is performed based on the electric conductivity in the main washing step, the rinsing can be performed efficiently.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the display means 31 is provided with a detergent amount display section 32 for displaying the detergent amount, and the control means 17 in FIG. 1 is provided with an initialization course for measuring the electric conductivity of tap water. The appropriate detergent amount is displayed on the detergent amount display unit 3 based on the electrical conductivity of tap water measured by the electrical conductivity measuring means 16.
I am trying to display it on 2.

To explain the operation in the above configuration, first, before starting the use of the dishwasher, an initialization course for measuring the electric conductivity of water used in the dishwasher is operated.
When the operation of the initialization course is started, the control means 17 issues a command for measuring the electric conductivity, and the electric conductivity means 16 measures the electric conductivity of the used water from the potential difference of the electrode 15.
The measured electric conductivity of the used water is calculated to the hardness of the water by the calculation means 18 according to the command of the control means 17, and the control means 17 is operated.
Judges the appropriate detergent concentration that suits the water quality from its hardness,
In the detergent amount display section 32, "standard", "1.5 times", "2"
The amount of detergent is displayed in three stages of "double".

Generally, the hardness of tap water is almost constant, and the hardness of ordinary tap water is about 50 ppm. However, in some areas, there is an area of 200 to 300 ppm, and depending on the user, well water may be used in the dishwasher, so it is necessary to consider cleaning with hard water having high hardness. Hard water usually means water of 150 ppm or more, and washing with hard water lowers the cleaning power for detergent stains (particularly protein stains), and the adhesion of many water spots deteriorates the finish of the glass cup. I need more detergent.

Therefore, in this embodiment, when the amount of detergent added for each hardness of water is 150 ppm or less, "standard", 15
It is set to "1.5 times" at 0 to 200 ppm and "2 times" at 200 ppm or more.

As described above, according to this embodiment, the electric conductivity of water used in the dishwasher is measured in advance, and the hardness of the used water is calculated, so that an appropriate amount of detergent suitable for the water quality can be obtained by the user. Can be shown in.

Next, a sixth embodiment of the present invention will be described. The control means 17 in FIG. 1 is provided with an initialization course for measuring the electrical conductivity of tap water, and the electrical conductivity of the wash water measured by the electrical conductivity measuring means 16 in the initialization course is stored in the storage means 19. However, when the electric conductivity of the wash water in the rinsing process matches the electric conductivity of the tap water stored in the storage means 19, the rinsing process is ended. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described. First, in the initialization course, the electric conductivity A4 of water used in the dishwasher is measured. The measured value A4 is stored in the storage means 19
It is stored in and is not updated until the initialization course is driven again. Next, when the user presses the start / temporary stop key 14 of the operating means 21, the operation is started, and the pre-washing process and the main-washing process are performed in the same manner as in the conventional example.

After that, when the rinsing process is started, the electric conductivity measuring means 16 is instructed by the control means 17 to cause the electric potential difference of the electrode 15 to cause the electric conductivity A5 of the washing water.
To measure. When the electric conductivity A5 of the wash water matches the electric conductivity A4 of the used water stored in the storage means 19, the control means 17 terminates the rinsing step and proceeds to the drying step of the next step.

As described above, according to the present embodiment, by preliminarily measuring and storing the electric conductivity of water used in the dishwasher, it is possible to perform rinsing with reference to the water used, so that it adheres to the dishes. The rinsing process can be efficiently and sufficiently performed without being affected by the dirt and water quality.

[0058]

As described above, according to the present invention, a cleaning tank, a water supply valve for supplying cleaning water into the cleaning tank, a cleaning pump for circulating the cleaning water in the cleaning tank, and a pump for supplying the cleaning water from the cleaning pump. A washing nozzle for spraying the washed water on the tableware in the washing tub, a heater for heating the washing water in the washing tub, and a drainage pump for discharging the washing water in the washing tub to the outside of the washing tub, Temperature detecting means for detecting the temperature of the cleaning water in the cleaning tank, water level detecting means for detecting the water level of the cleaning water in the cleaning tank, automatic detergent injection device for automatically injecting detergent, food, cleaning water, etc. Electrical conductivity measuring means for measuring the electrical conductivity of, a display means, and a control means for sequentially controlling a series of steps such as main washing, rinsing and drying, the control means, the electrical conductivity measurement The result measured by the means is displayed on the display means. Because the the, by measuring the electrical conductivity of the food, the salt concentration in the food can be easily grasped.

Further, the display means includes a salt concentration display portion for displaying the salt concentration, and the control means displays the salt concentration in the food by the salt concentration display portion based on the result measured by the electric conductivity measuring means. By doing so, the amount of salt ingested from the food can be grasped and can be used as a guideline for health management.

Further, since the control means causes the display means to display the result measured by the electric conductivity measuring means step by step according to the type of food for which the measurement is performed, the salt concentration for each menu is displayed stepwise. By doing so, it becomes possible to position various dishes such as soups, boiled dishes, western style, and Japanese style with respect to the appropriate salt content, and the dishwasher can be used as a guide for health management.

Further, since the control means performs the subsequent rinsing steps a predetermined number of times based on the electric conductivity of the washing water in the rinsing steps measured by the electric conductivity measuring means, it is appropriate without waste. Can be rinsed.

Further, the control means ends the rinsing process when the ratio of the electric conductivity of the rinsing water in the main washing process to the electric conductivity of the rinsing water in the rinsing process is below a predetermined value. Therefore, it is possible to perform proper rinsing regardless of the water quality, the type of detergent, and the input amount.

Further, the display means has a detergent amount display section for displaying the amount of detergent, the control means has an initialization course for measuring the electric conductivity of tap water, and the water measured by the electric conductivity measuring means is provided. Since the proper detergent amount is displayed on the detergent amount display section based on the electric conductivity of water, the detergent amount suitable for the water quality can be added.

Further, the control means is provided with an initialization course for measuring the electric conductivity of tap water, stores the electric conductivity of the wash water measured by the electric conductivity measurement means in the initialization course, and rinses the rinse water. Since the rinsing process is terminated when the electric conductivity of the washing water in the process of (1) matches the memorized electric conductivity of tap water, an appropriate rinsing is performed regardless of the water quality, the type of detergent, and the input amount. It can be carried out.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a dishwasher according to a first embodiment of the present invention.

[Figure 2] Sectional view of the dishwasher

FIG. 3 is a sectional view of the lid of the dishwasher.

FIG. 4 is an enlarged front view of operating means and display means of the dishwasher.

FIG. 5 is an enlarged front view of operation means and display means of the dishwasher according to the second embodiment of the present invention.

FIG. 6 is an enlarged front view of the operating means and display means of the dishwasher of the fifth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a conventional dishwasher

FIG. 8 is an enlarged front view of operating means and display means of the dishwasher.

[Explanation of symbols]

 1 Washing Tank 2 Tableware 3 Water Supply Valve 4 Washing Nozzle 5 Washing Pump 6 Heater 7 Drainage Pump 8 Temperature Detecting Device 9 Water Level Detecting Device 11 Detergent Automatic Filling Device 16 Electrical Conductivity Measuring Device 17 Controlling Device 23 Displaying Device

Claims (7)

[Claims] 1. A washing tank, a water supply valve for supplying washing water into the washing tank, a washing pump for circulating the washing water in the washing tank, and washing water sent from the washing pump for the washing tank. A cleaning nozzle for spraying the tableware inside, a heater for heating the cleaning water in the cleaning tank, a drainage pump for discharging the cleaning water in the cleaning tank to the outside of the cleaning tank, and a cleaning water in the cleaning tank Temperature detecting means for detecting the temperature, water level detecting means for detecting the water level of the cleaning water in the cleaning tank, automatic detergent injection device for automatically injecting the detergent, and electricity for measuring electric conductivity of food, cleaning water, etc. A conductivity measuring unit, a display unit, and a control unit that sequentially controls a series of steps such as main washing, rinsing, and drying, and the control unit displays the result measured by the electric conductivity measuring unit. Dishwasher designed to display. 2. The display unit includes a salt concentration display unit for displaying the salt concentration, and the control unit displays the salt concentration in the food by the salt concentration display unit based on the result measured by the electric conductivity measuring unit. The dishwasher according to claim 1, wherein. 3. The dishwasher according to claim 1, wherein the control means causes the display means to display the result measured by the electric conductivity measuring means step by step according to the type of food for which the measurement is performed. 4. The dishwashing according to claim 1, wherein the control means performs the subsequent rinsing step a predetermined number of times based on the electric conductivity of the washing water in the rinsing step measured by the electric conductivity measuring means. Machine. 5. The control means ends the rinsing process when the ratio of the electric conductivity of the rinsing water in the main washing process to the electric conductivity of the rinsing water in the rinsing process is below a predetermined value. The dishwasher according to claim 1. 6. The display means comprises a detergent amount display section for displaying the detergent amount, the control means is provided with an initialization course for measuring the electrical conductivity of tap water, and the water measured by the electrical conductivity measuring means is measured. The dishwasher according to claim 1, wherein an appropriate detergent amount is displayed on the detergent amount display unit based on the electric conductivity of water. 7. The control means is provided with an initialization course for measuring the electrical conductivity of tap water, stores the electrical conductivity of the wash water measured by the electrical conductivity measuring means in the initialization course, and rinses the rinse water. 2. The dishwasher according to claim 1, wherein the rinsing step is terminated when the electric conductivity of the wash water in the step of (1) matches the stored electric conductivity of the tap water.