JP2002153408A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washer capable of obtaining excellent washing performance even in the case that many oils and fats are contained in dish contaminants. SOLUTION: In this dish washer 150 for washing dishes 16 by the plural times of washing processes, by using acid washing water 8 adjusted by an electrolytic washing water adjusting part 2 in the washing process of the first time as washing water, the contaminants stuck to the dishes 16, especially oil and fat components, are efficiently washed off, the load amount of oil and fat stains in the washing water in the washing process is reduced and the washing rate of the dishes 16 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher used in ordinary households, and more particularly to a dishwasher for washing dishes using ionized water.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view of a main part of a conventional dishwasher.

A dishwasher 100 shown in FIG. 7 has a front door 29 which can be freely opened and closed for taking in and out dishes to be washed.
And a rack 15 for installing tableware 16 to be washed
A washing tank 12 for storing washing water 48 in a lower direction of the rack 15, a washing nozzle 14 protruding substantially at the center of the washing tank 12, and a rotatable washing nozzle 14;
6, a filter 42 for collecting solid food residues and the like dropped from the nozzle 6, a plurality of injection holes 49 provided on the cleaning nozzle 14, and heating for heating the cleaning water 48 provided in the cleaning tank 12. Heater 40 and cleaning water 48 are supplied to cleaning nozzle 1
A cleaning pump 13 for supplying the cleaning water 4 to the drain pipe 18; a drain pump 17 for discharging the cleaning water 48 to the drain pipe 18;
8, a water supply valve 47 for controlling water supply from the water supply pipe 19, and a drying fan 43 for blowing air for drying the washed dishes.
And a hot air heater 44 for heating the air blown from the drying fan 43, and discharging the supplied hot air from the main body to the outside, condensing water vapor to remove water from the cleaning tank 1.
2 and a control device 41 centered on a CPU for controlling the entire dishwasher.

Next, the washing operation of the dishwasher 100 will be briefly described. First, the front door 29 is opened and the tableware 16 to be washed is stored in a predetermined place of the rack 15,
After arranging the rack 15 on the washing tank 12, the exclusive detergent is introduced and the operation is started. Then, a predetermined amount of cleaning water 48 is supplied to the cleaning tank 12 through the water supply pipe 19 by the “opening” operation of the water supply valve 47.

Subsequently, the cleaning water 48 pressurized by the operation of the cleaning pump 13 is supplied to the rotary cleaning nozzle 14 together with the detergent.
Are sprayed onto the tableware 16 from the spray holes 49, and washing is performed. Thereafter, a rinsing step and a drying step are performed.

[0006]

In the dishwasher 100, when the washing process is started, the contaminants adhering to the dish 16 are mixed into the washing water 48, and the solid food residue is filtered by a filter for collecting the residue. Although filtered at 42, liquid contaminants such as oils and fats are mixed into the washing water 48 and injected again by the washing pump 13 onto the tableware 16.

In such a washing method, when the contaminant contains a large amount of oil, the detergent is reduced in washing power, and the washing water mixed with the oil which is not emulsified or dispersed is jetted. It re-adhered and it was difficult to improve the cleaning performance.

As a method for solving this problem, as disclosed in Japanese Patent Laid-Open Publication No. Sho 56-68423, a method of injecting air by injecting air into washing water or a method disclosed in Japanese Patent Publication No. 6-735.
No. 14, a method of pickling tableware has been proposed.

In order to improve the cleaning performance, Japanese Utility Model Application Laid-Open No. Hei 5-26051, Japanese Patent Application Laid-Open No. Hei 6-319673 and Japanese Patent Application No. Hei 6-187407 disclose washing with alkaline ionized water and then rinsing with acidic ionized water. Cleaning methods have been proposed.

[0010] However, in such a dishwasher, when there is a particularly large amount of greasy dirt attached to the dishes,
There was a problem that the cleaning performance was insufficient. In addition, since one of the ionized waters (either the alkaline ionized water or the acidic ionized water) obtained by the electrolysis is discarded without being used for washing and rinsing, it is not excellent in water saving ability. There were challenges.

It is therefore an object of the present invention to provide a dishwasher capable of obtaining good cleaning performance even when there is a large amount of fats and oils in the tableware contaminants.

It is another object of the present invention to provide a dishwasher which can prevent waste of disposing of supplied water without using it.

[0013]

According to a first aspect of the present invention, there is provided a dishwasher having a plurality of washing steps for washing dishes, and using washing water supplied for each of the plurality of washing steps. In the first washing step of a plurality of washing steps, acidic ionic water is supplied as washing water.

[0014] The dishwasher according to the second aspect is the first aspect.
In the dishwasher described in 1 above, alkaline ionized water is supplied as washing water at least once in the second and subsequent washing steps of the plurality of washing steps.

A dishwasher according to a third aspect of the present invention is for washing dishes using acidic ionized water, wherein the temperature of the acidic ionized water is 40 ° C. or higher.

A dishwasher according to a fourth aspect of the present invention is used for washing dishes using alkaline ionized water, wherein the temperature of the alkaline ionized water is 55 ° C. or higher.

A dishwasher according to a fifth aspect of the present invention includes at least a dishwashing step and a rinsing step, wherein the tableware is rinsed with acidic ionized water in the rinsing step, and the temperature of the acidic ionized water is 60 ° C. It is characterized by being at least ℃.

A dishwasher according to a sixth aspect of the present invention is for performing dishwashing and rinsing using a plurality of steps, and is required in each of the plurality of steps from supplied water. Means for simultaneously producing a predetermined amount of alkaline ionized water and acidic ionized water, and for each step, performing the step using any of the simultaneously generated predetermined amount of alkaline ionized water and predetermined amount of acidic ionized water Means, the number of times that the step is continuously performed using alkaline ionized water and the number of times that the step is continuously performed using acidic ionized water by the performing means in each of the plurality of steps is 2 The number of times is less than or equal to.

A dishwasher according to a seventh aspect of the present invention performs dishwashing and rinsing by using a plurality of steps, and requires water from supplied water in each of the plurality of steps. Means for simultaneously producing a predetermined amount of alkaline ionized water and acidic ionized water, and for each step, supplying water, and any one of a predetermined amount of simultaneously generated alkaline ionized water and a predetermined amount of acidic ionized water. Means for performing the step by using water, and when the plurality of steps is an odd number, at least one of the plurality of steps is a step using water supplied to the generating means. Features.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a main part of a dishwasher according to an embodiment of the present invention. Referring to FIG. 1, the configuration of the main body is basically the same as that of conventional dishwasher 100 shown in FIG. 7, and therefore description thereof will not be repeated here. The configuration of a water supply processing part different from the machine 100 will be described.

In the dishwasher 150 shown in FIG. 1, tap water 50 supplied from a tap of a water pipe is supplied to an electrolytic cleaning water adjusting unit 2 via a valve 1 provided between the water supply pipes 19 and 20. The structure of the electrolytic cleaning water adjusting unit 2 will be described later.

The cathode water pipe 3 taken out of the electrolytic cleaning water adjusting section 2 is connected to an alkaline cleaning water tank 5, and the anode water pipe 4 also taken out of the electrolytic cleaning water adjusting section 2 is connected to an acidic cleaning water tank 6. . The alkaline cleaning water tank 5 is supplied with alkaline cleaning water 7 supplied through the cathode water pipe 3.
Is stored to a predetermined water level, and acidic cleaning water 8 supplied through the anode water pipe 4 is stored in the acidic cleaning water tank 6 to a predetermined water level. Valves 9 and 10 are provided below the alkaline washing water tank 5 and the acidic washing water tank 6, respectively, and are connected to a washing water supply pipe 11 connected inside the dishwasher main body.

FIG. 2 is a sectional view showing the internal structure of the electrolytic cleaning water adjusting section 2 of FIG. Referring to FIG. 2, the electrolytic cleaning water adjusting section 2 connected to a water supply pipe 20 connected to a water pipe faucet includes anode plates 21a and 21b and cathode plates 22a and 2a.
2b and 22c are partition walls 2 provided with a plurality of openings.
They are arranged facing each other with 3a to 23d interposed therebetween. Tap water 50
Are cathode chambers 24a, 24b, and 24c containing the cathode plates 22a, 22b, and 22c partitioned by the partitions 23a to 23d, respectively, and the partitions 23a to 23d.
Are respectively led to anode chambers 25a and 25b which house the respective anode plates 21a and 22b partitioned.

Here, the cathode plate 22 of the electrolytic cleaning water adjusting unit 2
When a DC voltage is applied between the a, 22b and 22c and the anode plates 21a and 21b, the supplied tap water 50 is supplied to the cathode chambers 24a, 24b and 24c through the openings of the partition walls 23a to 23d by electrolysis. Alkaline cleaning water 7 is generated, and anode water (acid cleaning water) 8 is generated in the anode chambers 25a and 25b.

Next, the operation of the dishwasher 150 will be described with reference to FIGS. Tableware 16 to be washed
After the cleaning operation is instructed after the
When the valve 1 is in the “open” state, the tap water 50 is guided to the electrolytic cleaning water adjustment unit 2 through the water supply pipes 19 and 20 connected to the tap. Tap water 50 supplied into the electrolytic cleaning water adjusting unit 2 is electrolyzed into anodic water and cathodic water when the anode plates 21a and 21b and the cathode plates 22a, 22b and 22c are energized. Cathode water is an alkaline wash water that has a washing effect on fats and oils, starches and proteins, and anode water has an action of coagulating dirt, has a bactericidal action, and is an acidic wash water with a small amount of dissolved minerals. It is.

The alkaline washing water 7 obtained in the electrolytic washing water adjusting section 2 passes through the cathode water pipe 3 from the cathode chambers 24a, 24b and 24c.
A and 25b are supplied to an alkaline washing water tank 5 and an acidic washing water tank 6, which are independent of each other, through an anode water pipe 4 to a predetermined water level and stored. In this state, both valves 9 and 10 are in the "closed" state.

As described above, the alkaline cleaning water 7 and the acidic cleaning water 8 stored in the alkaline cleaning water tank 5 and the acidic cleaning water tank 6 are controlled according to the cleaning process by controlling the open / close states of the valves 9 and 10. The cleaning water 48 is sequentially supplied to the cleaning tank 12 through the cleaning water supply pipe 11 in an amount corresponding to the amount of cleaning water necessary for each cleaning step.
The required amount of washing water is an amount corresponding to the above-mentioned predetermined level of the ionic water in the tanks 5 and 6.

The tableware 16 may store the alkaline washing water 7 and the acidic washing water 8 while storing them, and then arrange them on the rack 15.

Then, the first cleaning step is started. The acidic washing water 8 is supplied to the washing tank 12, and the acidic washing water 8 is pressurized by the energization of the washing pump 13. The cleaning is performed by spraying the acidic cleaning water 8 from the nozzle. At this time, since the heater 40 installed in the cleaning tank 12 is also energized, the cleaning water 8 is warmed while circulating, and the cleaning effect is further improved.

The washing water 8 is drained to a general household sewer through the drain pipe 18 by the operation of the drain pump 17 through the filter 42 for collecting the residue. This means that the first cleaning step has been completed.

Next, the second, third, fourth,...
The cleaning process is repeated the number of times designated as, and a series of processes from cleaning to draining is repeated using new cleaning water as in the first cleaning process, and finally a new rinsing process is performed. Rinse and cleaning of the dishes is performed using the acidic cleaning water 8 in the same manner as in the cleaning step.

With the above, a series of washing and rinsing steps for dishes are completed, and then a drying step is performed.

The amount of washing water supplied to and stored in the tanks 5 and 6 corresponds to the amount of washing water required for each of a plurality of washing steps and rinsing steps. Therefore, the predetermined water level at which the cleaning water in the tanks 5 and 6 is stored is a water level corresponding to the amount of cleaning water required for each of a plurality of cleaning steps and rinsing steps.

The number of washing steps can be arbitrarily set according to, for example, the degree of contamination of the tableware 16.

Further, although the acidic cleaning water 8 is designated as the cleaning water used in the first cleaning step, it is not limited to this. That is, the washing water in the first washing step may be determined according to the degree of dirt on the tableware 16, particularly, the degree of dirt on the grease. Specifically, when the grease stain is particularly severe, the first
The acidic washing water 8 is used as the second washing water.

This is because the dirt on the tableware 16 is efficiently washed away due to the coagulation action of the grease stains by the acidic washing water 8, and the washing load on the stains in the second and subsequent washing steps is reduced, and the washing performance is improved. It is. If the grease stain is severe, the alkaline cleaning water 7 is added to the second cleaning step following the first cleaning step using the acidic cleaning water 8.
By using the water, the emulsifying action of the oil and fat, the hydrolysis reaction of the protein, and the swelling action of the starch by the washing water 7 are promoted, and the washing is effectively performed.

Further, in the case where dishes are washed by repeating a plurality of washing steps, the properties of the washing water used in each washing step (alkaline washing 7 or acidic washing) are taken into consideration in consideration of the load on the stains (degree of stains). Water 8) may be determined.

When the acidic washing water 8 is used at the time of rinsing after the completion of the washing step, rinsing without water spots can be performed.

The drying step after the rinsing step includes a drying fan 43 and a hot air heater 4 provided on the upper side wall of the cleaning tank 12.
4 to supply hot air to the tableware 16.

The control of time, temperature, water level (amount of washing water), etc. in a series of washing steps and rinsing steps is appropriately performed through the control device 41 based on signals from various sensors (not shown) disposed in each section and each place. Done. Specifically, the control device 41 controls the applied voltage of the electrolytic cleaning water adjustment unit 2, cleaning of the anode and the cathode,
Opening and closing of 9 and 10, control of the amount of water stored in the cleaning water tanks 5 and 6, control of the supply amount of the cleaning water 7 and 8 to the cleaning tank 12,
Temperature control of cleaning water 7 and 8 by heater 40, drive control of cleaning pump 13 and drain pump 17,
The operation or control of the drying fan 43 and the warm air heater 44 is automatically performed. Therefore, in the process, the cleaning water 7 and 8 are automatically supplied / discharged, and the tableware 16 is dried and dried.
Can be stored.

FIG. 3 is a diagram showing a configuration of an electric circuit of the dishwasher 150, and FIG. 4 is a detailed configuration diagram of the power supply circuit 31 for the electrolytic cleaning water adjusting unit of FIG.

Referring to the figure, the AC power supplied to dishwasher 150 includes a fuse Fu and a power switch (in the figure,
This is supplied to each unit via S1 and a door switch S2. The power supply circuit 31 for the electrolytic cleaning water adjusting unit includes a water level switch S3 on the tank 7 side and a switch S4 on the tank 8 side.
ON / OFF control is performed by a pressure switch S12 and the valve 11 is controlled by switches S3 and S4.
The valve 9 is turned on / off by switches S3 and S4 and further by a timer contact S6. The valve 10 is on / off controlled by a switch S4 and a timer contact S7. The cleaning pump 13 and the heater 40 are controlled by the water level switch S5 and the timer contact S8, and the drainage pump 17 is controlled by the timer contact S9.
On / off of the heater 44 for hot air is controlled by a timer contact S10 and a temperature switch S11. The control device 41 including the CPU receives power supply by turning on the power switch S1 and the door switch S2.

Referring to FIG. 4, in power supply circuit 31 for the electrolytic cleaning water adjusting unit, a power indicator lamp 33 is provided on primary side wiring 32 of power transformer 34, and electrolytic cleaning water adjusting unit 2 is operating. Is displayed. On the other hand, a secondary side tap changer 35 is provided on the secondary side wiring 38 of the transformer 34, and the anode plates 21 a and 21 b and the cathode plate in the electrolytic cleaning water adjusting unit 2 are provided via a rectifier 36 and a smoothing capacitor 37. Adjustment of the voltage applied to 22a-22c is performed. The voltage applied between the anode plate and the cathode plate is adjusted in order to adjust the hydrogen ion concentration (pH) of the anode water and the cathode water according to the purpose of cleaning.

Next, a specific example of the actual washing process of the dishwasher 150 will be described. FIG. 5 is a diagram for comparing the cleaning performance in a table format when various cleaning waters are used in the dishwasher.

FIG. 5 shows cleaning examples 1 to 9 in which dishwashing is performed in the dishwasher 150 and cleaning example 10 in which dishwashing is performed in the dishwasher 100 using tap water and a detergent.

The cleaning examples 1 to 7 and 9 correspond to the first to sixth 6
Dish washes were washed by two washing steps. Washing example 8
Tables 10 and 10 show the results of washing the dishes by the first to fifth washing steps.

Each pH of washing water used in washing examples 1 to 9
Since it was confirmed that there was no difference in the cleaning performance even when the value was changed, the cleaning was performed with the acidic cleaning water 8 at a pH value of 3.5 and the alkaline cleaning water 7 at a pH value of 10.0. ing.

In FIG. 5, the cleaning ability in each cleaning example is shown by the corresponding glass cleaning rate. The higher the glass cleaning rate, the better the cleaning ability.

In FIG. 5, first, attention is paid to a change in the cleaning rate depending on the temperature of the acidic cleaning water 8 used in the first cleaning step. For example, when cleaning examples 1 and 2 are compared with each other,
The difference between the two is only in the temperature of the acidic cleaning water 8 used in the first cleaning step. Cleaning example 1 has a higher temperature of the acidic cleaning water 8 used in the first cleaning step than cleaning example 2, and cleaning example 1
Of the cleaning example 2 is higher than that of the cleaning example 2. This is because fats and oils, particularly solid fats and oils such as lard, are not sufficiently dissolved when the temperature of the acidic washing water 8 is low.

Therefore, the acidic cleaning water 8 in the first cleaning step
Is desirably at least 40 ° C. at which a solid fat such as lard dissolves.

Next, in FIG. 5, attention is paid to a change in the cleaning rate due to the temperature of the alkaline cleaning water 7 used in the second cleaning step. For example, when the cleaning examples 1, 3 and 4 are compared with each other, the difference between them is only the temperature of the alkaline cleaning water 7 used in the second cleaning step. The temperature of the alkaline cleaning water 7 in the second cleaning step of Cleaning Examples 1 and 4 is higher than that of Cleaning Example 3, and the cleaning rates of Cleaning Examples 1 and 4 are Cleaning Example 3.
It is higher than that of. This is because if the temperature of the alkaline cleaning water 7 decreases, the degree of dispersion of dirt decreases, which affects the cleaning rate.

According to an experiment, it was found that the alkaline washing water 7 at the time of washing is desirably 55 ° C. or higher.

FIG. 6 is a table showing the sterilizing effect of the washing water in a table format. In FIG. 6, cleaning examples 1, 9 and 10 of FIG.
In each example, the germicidal effect in the rinsing step after washing, that is, the step corresponding to the final washing step in each case, is shown.

Referring to FIG. 6, cleaning examples 1, 9 and 1
Among 0, the bactericidal effect is the largest in Cleaning Example 9. FIG.
Referring to FIG. 8, the acidic washing water 8 used in the final washing step
Of the cleaning example 9 is 60 ° C., which is the highest. According to the experiment, it was found that when the temperature of the acidic cleaning water 8 at the time of the final cleaning step (at the time of rinsing) is 60 ° C. or higher, the sterilizing ability is the highest.

Therefore, at the time of rinsing after the dishwashing mode is completed, it is desirable that acidic washing water having a bactericidal action is used and the temperature of the washing water is 60 ° C. or more.

Referring to cleaning examples 1, 2, 3, 4, and 9 in FIG. 5, it can be seen that the cleaning water generated by the electrolytic cleaning water adjusting unit 2 is all effectively used without being wasted. That is, when the tap water 50 is supplied, the electrolytic cleaning water adjusting unit 2 in FIG.
The tank 6 stores the alkaline cleaning water 7 for one cleaning step, and the tank 6 stores the acidic cleaning water 8 for one cleaning step. Therefore, if the number of washing steps using the same type of washing water is continuously set to two or less as in Washing Examples 1, 2, 3, 4, and 9, one time of tap water 50 in the dishwasher 150 is used.
Washing can be performed using the washing waters 7 and 8 obtained by water supply each time, and any one of the obtained washing waters is not wasted.

In the case of FIG. 5, since the acidic cleaning water 8 is used so that the sixth cleaning step, which is the final cleaning step, is a rinsing step, rinsing cleaning without water spots can be performed.

In the cleaning example 8 shown in FIG. 5, the cleaning step is repeated first to fifth times. In this case, since the tap water 50 is used as the washing water in the third washing step, the washing water generated by the electrolytic water adjusting unit 2 can be effectively used without being discarded. That is, when the washing mode includes an odd number of washing steps, by providing a washing step using tap water 50, the electrolytic water generated by the electrolytic washing water adjusting unit 2 can be used for dishwashing without being discarded.

The tap water 50 is supplied to the electrolytic cleaning water adjusting unit 2.
When the valve 9 or 10 and the valve 1 are opened in a state where power is not supplied to the cleaning tank 12, cleaning water is supplied to the cleaning tank 12.

Although the lower limit of the water temperature of the washing water 7 or 8 is specified here, the upper limit of the water temperature of each washing water is set so as not to exceed the maximum temperature allowed by the material of the tableware 16. Alternatively, the temperature does not exceed the maximum temperature at which the cleaning water can be heated by the heater within the limited cleaning time of each cleaning step.

[0062]

According to the first aspect of the present invention, the dishwasher according to the first aspect of the present invention can efficiently wash away contaminants adhering to the tableware by washing the tableware with acidic ion water in the first washing step. The load of oil stains in the washing water in the washing step is reduced, and the effect of washing dishes can be improved.

The dishwasher according to the second aspect of the present invention is the dishwasher according to the first aspect, in which the dishwashing is performed at least once with alkaline ionized water in the second and subsequent washing steps. The emulsifying action, the protein hydrolysis reaction and the swelling action of the starchy substance occur, and the washing can be performed effectively.

In the dishwasher according to the third aspect, the temperature of the acidic ionized water as the washing water used in the washing step is set at 40 ° C.
℃ or higher, so that it is possible to efficiently wash away animal fats and oils and dirt adhering to dishes, reduce the load of animal fats and oils and dirt in the wash water in the washing process, and improve the washing effect of dishes. Can be.

In the dishwasher according to the fourth aspect of the present invention, the temperature of the alkaline ionized water as the washing water used for washing the dishes is set to 55 ° C. or higher, whereby the emulsifying action of the oil and fat by the alkaline ionized water and the protein The decomposition reaction and the swelling action of the starch material become more active, and the washing effect is further increased.

The dishwasher according to the fifth aspect uses acidic ionized water having a water temperature of 60 ° C. or higher in the rinsing step, so that the dishes can be effectively sterilized.

In the dishwasher according to the sixth aspect of the present invention, the number of times the steps using alkaline ionized water are continuously performed in the plurality of steps for washing and rinsing the dishes, and the steps using acidic ionized water are different. By setting the number of times to be continuously performed to twice or less, it is possible to wash using the acidic ionized water and the alkaline ionized water generated by one water supply, and to generate the generated ions. Either one of the water is not wastefully discarded, and the generated ion water can be used without waste.

In the dishwasher according to the present invention, when the dishes are washed by a plurality of steps including a washing step and a rinsing step, if the steps are repeated an odd number of times, a step using supplied water is provided. In addition, the generated acidic ion water and alkaline ion water can be used without waste.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an internal structure of the electrolytic cleaning water adjusting unit of FIG.

FIG. 3 is a diagram showing a configuration of an electric circuit of the dishwasher of FIG. 1;

FIG. 4 is a detailed configuration diagram of a power supply circuit for the electrolytic cleaning water adjusting unit in FIG. 3;

FIG. 5 is a diagram for comparing, in a table format, cleaning performance when various types of cleaning water are used in a dishwasher;

FIG. 6 is a diagram showing a sterilization effect of cleaning water in a table format.

FIG. 7 is a sectional view of a main part of a conventional dishwasher.

[Explanation of symbols]

 2 Electrolytic cleaning water adjustment unit 7 Alkaline cleaning water 8 Acidic cleaning water 12 Cleaning tank 50 Tap water 150 Dishwasher Note that the same reference numerals in each figure indicate the same or corresponding parts.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoko Fukushima 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Inside Sharp Corporation (72) Inventor Takeo Abe 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Sharp Co., Ltd. F-term (reference) 3B082 BD01 CC02

Claims (7)

[Claims] 1. A dishwasher having a plurality of washing steps for washing dishes, wherein said dishwasher is washed using washing water supplied each time of said plurality of washing steps, In the first cleaning step of the multiple cleaning steps,
A dishwasher, wherein acidic ionic water is supplied as the washing water. 2. The dishwasher according to claim 1, wherein in the second and subsequent washing steps of the plurality of washing steps, alkaline ionized water is supplied as the washing water at least once. . 3. A dishwasher for washing dishes using acidic ionized water, wherein the temperature of the acidic ionized water is 40 ° C. or higher. 4. A dishwasher for washing dishes using alkaline ionized water, wherein the temperature of the alkaline ionized water is 55 ° C. or higher. 5. A dishwasher having at least a dishwashing step and a rinsing step, wherein the tableware is rinsed with acidic ionized water in the rinsing step, wherein the temperature of the acidic ionized water is 60 ° C. or higher. And a dishwasher. 6. A dishwasher for washing and rinsing dishes using a plurality of steps, wherein a predetermined amount of alkalinity required in each of the plurality of steps is determined from supplied water. Means for simultaneously generating ionized water and acidic ionized water, and means for performing the step using any of the predetermined amount of alkaline ionized water and the predetermined amount of acidic ionized water simultaneously generated for each step. In the plurality of steps, the number of times the step is continuously performed using the alkaline ionized water by the performing means and the cleaning step is continuously performed using the acidic ionized water. The dishwasher is characterized in that the number of times of the dishwasher is two or less. 7. A dishwasher for washing and rinsing dishes using a plurality of steps, wherein a predetermined amount of alkalinity required in each of the plurality of steps is determined from supplied water. Means for simultaneously generating ionized water and acidic ionized water, and for each of the steps, using the supplied water, and any one of the predetermined amount of the simultaneously generated alkaline ionized water and the predetermined amount of acidic ionized water. Means for performing the step, wherein when the plurality of steps is an odd number, at least one of the plurality of steps is a step using the supplied water.