JP3258884B2 - Dishwasher and dishwashing method for dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG. 10 is a sectional view of a main part of a conventional dishwasher.

A dishwasher 100 shown in FIG. 10 has a front door 29 which can be freely opened and closed for taking in and out the 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 rotatable washing nozzle 14 protruding substantially at the center of the washing tank 12, and a tableware 16 for washing.
A filter 42 for collecting solid food residues and the like dropped from the water, 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 discharge 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, a drying fan 43 for blowing air to dry the washed dishes, and a drying fan 43. A hot air heater 44 for heating the blown air, a heat exchange duct 30 for discharging the supplied hot air from the main body to the outside, condensing water vapor, and returning the water to the washing tank 12; 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, the tableware 16 to be washed is stored in a predetermined place of the rack 15, the rack 15 is placed on the washing tank 12, and a dedicated detergent is supplied to start the operation. Then, a predetermined amount of washing water 4 is supplied through the water supply pipe 19 by the “open” operation of the water supply valve 47.
8 is supplied to the cleaning tank 12.

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 through the spray holes 49, and washing is performed. Thereafter, a rinsing step and a drying step are performed.

[0006]

In the above-described dishwasher, 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 trapped. The contaminants in the form of liquid such as oils and fats are mixed into the washing water 48,
Is again injected into the tableware 16. In such a cleaning method, when the contaminants contain a large amount of fats and oils, the cleaning power of the detergent is reduced, and the washing water mixed with the fats and oils that are not emulsified or dispersed is jetted. However, it was difficult to enhance the cleaning performance.

As a method for solving this problem, as disclosed in Japanese Patent Application Laid-Open No. 56-68423, a method of injecting air by injecting air into washing water, or a method disclosed in Japanese Patent Publication No. 6-735.
As disclosed in Japanese Patent Publication No. 14, a method of placing tableware has been proposed. In order to improve the cleaning performance, Japanese Unexamined Utility Model Publication No. Hei 5-26051 and Japanese Unexamined Patent Publication No. Hei 6-3196 have been proposed.
No. 73 discloses a method of washing with alkaline ionized water and then rinsing with acidic ionized water. However, in such a dishwasher, there is a problem that the cleaning performance is insufficient when there is a particularly large amount of greasy dirt attached to the tableware.

Further, in the method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-319673, the pH of alkaline ionized water is 9-1.
1, the pH of acidic water ion water is described as 2 to 4,
In some areas, there is a problem that water contains a large amount of carbonate ions and bicarbonate ions, and there is a water quality where the pH value does not appear.

[0009] Therefore, an object of the present invention is to provide a dishwasher capable of obtaining good washing performance in any water quality area even when the amount of fats and oils in the tableware contaminants is high.

[0010]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention has solved the above-mentioned problems, and the invention according to claim 1 has a water supply means for sending water, an electrolysis of the supplied water and an acidification. comprising a electrolytic washing <br/> water purification adjusting means for adjusting the ionized water and alkaline ionized water, a cleaning vessel for performing the dishes were housed washed, and drainage means for discharging the water in the cleaning tank to the outside of the apparatus, In a dishwasher for washing and rinsing dishes by repeating the washing and draining steps a plurality of times, the first washing of the washing steps repeated a plurality of times is performed using acidic ionized water having a pH of 6.0 or less, and a water temperature of 40 ° C. As above, the cleaning time is 10
It is provided with a washing means for washing under the condition of minutes or less.

[0011] According to a second aspect of the invention, a water supply means for feeding water, the water supply and water electrolyzed, storage and electrolytic washing water adjusting means for adjusting an acidic ion water and alkaline ionized water, the dishes A washing tank for performing washing and rinsing, and a drainage means for discharging water in the washing tank to the outside of the machine. By repeating the washing and draining steps a plurality of times, the dishwasher for washing and rinsing the dishes is repeated a plurality of times. The first cleaning step of the cleaning step using acidic ionized water
Cleaning process, and at least one of the subsequent cleaning processes
The washing is performed using alkaline ionized water having a pH of 8.5 or more as washing water, and provided with washing means for washing at a water temperature of 55 ° C. or more and a washing time of 15 minutes or more.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, in order to wash dishes,
Injecting means for injecting washing water to tableware, and injecting the injecting means
It has a configuration with switching means for switching the intensity, at least
Injection intensity of acidic ionized water used in the first round of washing steps
Dishwasher characterized by washing only with "weak"
This is the method of cleaning the dishes used .

According to a fourth aspect of the present invention, in addition to the configuration of the second aspect of the present invention, a dishwasher is provided.
An injection means for injecting washing water into tableware in order to
The apparatus is provided with a switching means for switching the injection intensity.
Adjust the injection strength of the acidic ion water used for the second cleaning process.
Wash as "weak", and use pH 8.5 or higher as washing water.
Water temperature of 55 ° C or higher, using lubricated ionized water, cleaning time
A dishwasher characterized in that the washing water in the washing step for washing for more than 15 minutes is washed with the jet strength of the washing water being set to "strong".
This is a method of cleaning dishes used in the present invention.

In the dishwasher of the present invention having the above-mentioned construction, the invention according to claim 1 is characterized in that the pH of the acidic ionized water is adjusted to 6. by the electrolytic cleaning water adjusting section in the first cleaning step of the plurality of cleaning steps. By adjusting the temperature to 0 or less and washing at a water temperature of 40 ° C., it becomes possible to efficiently wash away animal oil and fat stains adhering to tableware due to the cohesive action of the oil and fat stains by the acidic ionized water. Can reduce the load of animal fats and oils and improve the washing effect of dishes. In addition, by keeping the cleaning time at 10 minutes or less, the dirt can be prevented from adhering to the inner wall of the cleaning tank without dispersing the oily dirt aggregated by the acidic ionized water again.

Further, the invention according to claim 2 is characterized in that the pH of the alkaline ionized water is adjusted to 8.5 or more by the electrolytic cleaning water adjusting section, and the washing is carried out at a water temperature of 55 ° C. or more and a washing time of 15 minutes or more. The emulsifying action of fats and oils, the hydrolysis reaction of proteins, and the swelling action of starchy substances by the alkaline ionized water are promoted effectively and effectively, and the washing effect of dishes can be improved.

According to a third aspect of the present invention, in the acidic ionized water cleaning performed in the first of a plurality of cleaning steps,
By performing the jetting intensity of the washing water at “weak”, it is possible to prevent the stains from adhering to the inner wall or the like of the washing tank without dispersing the oil stains aggregated by the acidic ion water again.

[0017] and also, the invention of 請 Motomeko 4 described, cleaning
Use alkaline ionized water with pH 8.5 or more as water
Cleaning at a water temperature of 55 ° C or higher and a cleaning time of 15 minutes or longer
By performing the jetting intensity of the washing water in the washing step to be “strong”, the emulsifying action of the fats and oils by the alkaline ionized water, the hydrolysis reaction of the protein and the swelling action of the starchy substance more effectively remove the dirt floating from the dishes. Can be discharged.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dishwasher according to the present invention will be described 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. In FIG. 1, the configuration of the main body is shown in FIG.
Since the configuration is basically the same as that of the conventional dishwasher 100 indicated by “0”, the same parts as those of the conventional dishwasher are denoted by the same reference numerals, and the description thereof is omitted. The configuration of the different water supply processing parts 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 through 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.

In the alkaline washing water tank 5, alkaline ion water 7 supplied through the cathode water pipe 3 is stored to a predetermined level, and in the acidic cleaning water tank 6, acid ion water 8 supplied through the anode water pipe 4 is stored. Up to the 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, anode cleaning plates 21 a and 21 b and cathode plates 22 a and 22 are provided in electrolytic cleaning water adjustment unit 2 connected to water supply pipe 20 connected to a water pipe faucet.
b and 22c are partitions 23 provided with a plurality of openings.
a to 23d. Tap water 50 is the cathode plate 2 partitioned by each of the partition walls 23a to 23d.
It is led to the cathode chambers 24a, 24b and 24c containing the respective 2a, 22b and 22c and the anode chambers 25a and 25b containing the respective anode plates 21a and 21b partitioned by the partition walls 23a to 23d.

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 ionized water) 7 is generated, and anode water (acidic ionized water) 8 is generated in the anode chambers 25a and 25b.

Next, the operation of the dishwasher 150 of the present invention will be described with reference to FIGS. When the washing operation is instructed after the tableware 16 to be washed is set on the rack 15, the valve 1 is set to “open”, and the electrolytic washing water adjusting unit is passed through the water supply pipes 19 and 20 connected to the water pipe faucet. Tap water 50 is led to 2. Electrolytic cleaning water adjustment unit 2
The tap water 50 supplied to the inside is supplied to the anode plates 21a and 21a.
When b and the cathode plates 22a, 22b and 22c are energized, they are electrolyzed into anode water and cathode water. Cathode water is alkaline ionized water that has a cleaning effect on fats, starches, and proteins, and anode water has the action of coagulating dirt, has a bactericidal action, and is acidic ionized water with a small amount of dissolved minerals. It is.

The alkaline ionized water 7 obtained in the electrolytic cleaning water adjusting section 2 passes through the cathode water pipe 3 from the cathode chambers 24a, 24b and 24c, and similarly, the acidic ionized water 8 passes through the anode water pipe 4 from the anode chambers 25a and 25b. The water is supplied to and stored in a predetermined water level in the alkaline cleaning water tank 5 and the acidic cleaning water tank 6, which are independent of each other. In this state, both valves 9 and 10 are in the "closed" state.

As described above, the alkaline ionic water 7 and the acidic ionic 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 state of the valves 9 and 10. The washing water 48 is sequentially supplied to the washing tank 12 through the washing water supply pipe 11 in an amount corresponding to the amount of washing water necessary for each washing 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. In addition, the tableware 16 stores the alkaline ionized water 7 and the acidic ionized water 8, or after storing these, the rack 15.
May be arranged.

Then, the first cleaning step is started. The cleaning water 7 or 8 supplied to the cleaning tank 12 is pressurized when the cleaning pump 13 is energized, and the tableware 16 arranged on the rack 15 converts the cleaning water 7 or 8 from the jet hole 49 of the rotating cleaning nozzle 14. Or it is washed by the injection of 8. At this time, the injection pressure of the cleaning pump 13 can be switched between high and low by an injection intensity switch (not shown). At the same time, since the heater 40 installed in the cleaning tank 12 is also energized, the cleaning water 7 or 8 is heated while circulating, and the cleaning effect is further improved.

The washing water 7 or 8 is passed through a filter 42 for collecting the residue, and the drain pipe 1 is operated by the operation of the drain pump 17.
It is drained to general household sewers through 8. This is the first
This means that the second cleaning step has been completed. Next, the cleaning process is repeated the number of times designated as the second, third, fourth,..., But from the cleaning to drainage using fresh cleaning water in the same manner as the first cleaning process. Is repeated, finally, as a rinsing step, the tableware is rinsed with fresh cleaning water 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 drying process is performed by supplying hot air to the tableware 16 by a drying fan 43 and a hot air heater 44 provided on the upper side wall of the cleaning tank 12. The control of time, temperature, water level (wash water amount) and the like 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.

More specifically, the control device 41 controls the applied voltage of the electrolytic cleaning water adjusting section 2, cleaning of the anode and cathode, opening and closing of valves 1, 9 and 10, cleaning water tanks 5 and 6.
Control of the amount of stored water, supply amount of cleaning water 7 and 8 to cleaning tank 12, temperature control of cleaning water 7 and 8 by heating heater 40, drive control of cleaning pump 13 and drainage pump 17,
The operation or control of the drying fan 43 and the warm air heater 44 is automatically performed. Therefore, the washing water 7 and 8 are automatically supplied / discharged in the process, and the tableware 16 can be dried and stored. FIG. 3 is a diagram showing a configuration of an electric circuit of the dishwasher 150, and FIG. 4 is a detailed diagram of a power supply circuit 31 for the electrolytic cleaning water adjusting unit in FIG.

[0030] With reference to FIG. 3, the AC power supplied to the dishwasher 150, the fuse Fu, the power switch (in the figure, abbreviated as SW) is supplied to each section via the S ₁ and the door switch S _2. The power supply circuit 31 for the electrolytic cleaning water adjusting unit includes a water level switch S ₃ on the tank 5 side and a switch S ₄ on the tank 6 side.
And it is turned on / off controlled by the pressure switch S _12,
Valves 1, the switch S ₃ and S _4, the valve 9
Is turned on / off by switches S ₃ and S ₄ and a timer contact S ₆ . The valve 10 has a switch S ₄
And on / off controlled by the timer contact S _7.
Washing pump 13 and the heater 40, the water level switch S ₅ and the timer contact S _8, the drainage pump 17,
The timer contact S _9, the drying fan 43 and Yutakakazeyo heater 44, the timer contact S ₁₀ and temperature switches S
On / off control is performed by ₁₁ respectively. Also, CP
Controller 41 including a U is supplied with power by the on of the power switch S ₁ and the door switch S _2.

Referring to FIG. 4, the power supply circuit 31 for the electrolytic cleaning water adjusting unit is provided with a power indicator lamp 33 on the primary side wiring 32 of the power transformer 34, indicating that the electrolytic cleaning water adjusting unit is operating. Is displayed. On the other hand, a secondary side tap changer 35 is provided on the secondary side wiring 38 of the power transformer 34, and the anode plate 21 a and the cathode plate 21 in the electrolytic cleaning water adjustment unit 2 are provided via a rectifier 36 and a smoothing capacitor 37.
b and the voltage applied to the cathode plates 22a to 22c are adjusted. At this stage of adjustment, in the dishwasher of the present invention, the pH of the alkaline ionized water is adjusted to 8.5 or more, and similarly,
The pH of the acidic ionized water is adjusted to 6.0 or less. This value is supported by the experimental results described below.

FIG. 5 is a diagram showing a change in the amount of fats and oils depending on the pH of the acidic ionized water 8. The amount of fats and oils is the amount of fats and oils contained in the washing wastewater, the higher the value, the better the dirt is discharged,
It shows that cleaning performance is excellent. In FIG.
It is confirmed that the amount of fats and oils is remarkably reduced at the borderline of 6.0, and that the efficiency of washing is being reduced more than that. Thereby, when the pH of the acidic ionized water 8 becomes 6.0 or more,
It can be seen that the aggregating action of the fats and oils is reduced and the recovery of the fats and oils is deteriorated. Therefore, it is desirable that the pH of the acidic ionized water 8 be suppressed to 6.0 or less at the highest. In other words, it can be said that the cleaning performance can be ensured even at a weak acidity up to pH 6.0.

FIG. 6 shows the washing of dishes when the washing time of the acidic ionized water 8 used in the first washing step is changed.
It is a figure showing the change of beauty of going up . (Hereafter, tableware
The beauty of the wash is expressed using the term "wash index"
The higher the washing index, the more beautiful
It is assumed that 6 ) In FIG. 6, a decrease in the washing index is remarkably observed around the time when the washing time exceeds 10 minutes.
According to the experiment, if the cleaning time of the acidic ion water 8 used in the first cleaning step is lengthened, the oily dirt that has once aggregated is not drained as it is but is deposited on the inner wall of the cleaning tank 12 or in the middle of the drainage path. I know it will go. This can be said to have affected the decrease in the cleaning index. Therefore, when performing the first cleaning step with the acidic ionized water 8, the cleaning time is desirably suppressed to 10 minutes or less.

FIG. 7 is a diagram showing a change in the cleaning index depending on the pH of the alkaline ionized water 7. In FIG . In FIG.
The cleaning index increased remarkably after 8.5, and the index was maintained at around 90. After that, even if the pH value is increased, the cleaning index is almost constant, and it is confirmed that there is no difference in the cleaning performance. This shows that up to pH 8.5 of the alkaline ionized water 7, the emulsifying action of fats and oils, the hydrolysis reaction of proteins, and the swelling action of starch are performed effectively.
Therefore, the pH of the alkaline ionized water 7 is desirably at least 8.5 or more. In other words, p
It can be said that H can be effectively washed even when the alkali is weakly alkaline up to 8.5.

FIG. 8 is a diagram showing a change in the cleaning index when the cleaning time of the alkaline ionized water 7 in the second step is changed . In Figure 8, the cleaning index increases over time, washed index 9 0 Become can be seen around became cleaning time over 15 minutes. According to the experiment, if the washing time with the alkaline ionized water 7 is short, the hydrolysis reaction of fats and oils and proteins is not sufficiently performed, which can be said to affect the washing index .

Therefore, it is desirable that the washing with the alkaline ionized water be performed for at least 15 minutes or more. Further, since the water temperature of the acidic ionized water is 40 ° C. or higher, the washing effect of the tableware can be improved. Similarly, it can be understood that the cleaning effect is increased by setting the water temperature of the alkaline ionized water to 55 ° C. or higher. I have.

FIG. 9 is a table showing a specific example of the actual washing process of the dishwasher 150. According to the results shown in FIGS. 5 and 6, acidic ion water having a pH of 6.0 or less was used in the first step, the water temperature was 40 ° C. or more, the cleaning time was 10 minutes or less, and the injection intensity of the acidic ion water was set to “weak”. By performing the washing, the oil stains adhered to the tableware are efficiently aggregated, and the load amount of the oil stains in the washing water is reduced without dispersing the aggregated soil again.

Next, in the second step, alkaline ionized water having a pH of 8.5 or more was used, the water temperature was 55 ° C. or more, and the washing time was 1 hour.
By washing the alkaline ionized water for 5 minutes or more with the jetting strength of "strong", the dirt that has floated due to the emulsifying action of fats and oils, the swelling action of starchy substances, etc. is efficiently washed away.

In the third step, as in the first step, the pH was 6.0.
Washing is performed at a water temperature of 40 ° C. or higher using the following acidic ionized water. Here, it is considered that re-dispersion of dirt is small, and the washing time and the jetting strength of the washing water are not specified. In the fourth to sixth steps, washing was performed under each condition using each washing water as shown in the table, but acidic ionized water having a pH of 6.0 or less and pH 8.5 were washed.
Except for using the above alkaline ionized water, the jetting strength of the cleaning water is not specified.

The number of cleaning steps and the nature of the cleaning water (alkaline ionized water 7 or acidic ionized water 8) used in each of the cleaning steps can be arbitrarily set according to the load on the dirt (the degree of dirt). For example, when the load of dirt is small, the first step using the acidic ionized water shown in FIG. 9 may be omitted, and the washing may be performed five times after the second step.

[0041]

Since dishwasher of the present invention exhibits a structure Unaryo above, according the invention of claim 1, wherein the plurality of first time acidic ionized water by a washing step electrolytic washing water adjusting means of the cleaning process By adjusting the pH to 6.0 or less and washing at a water temperature of 40 ° C., it becomes possible to efficiently wash away animal fats and oils stains adhering to dishes due to the cohesive action of fats and oils stains by acidic ionized water. The load of animal stains in the washing water in the process can be reduced, and the effect of washing dishes can be improved. In addition, by setting the washing time to 10 minutes or less, it is possible to discharge the once-aggregated oil and fat stain without dispersing it again.

Further, the invention according to claim 2 is characterized in that the pH of the alkaline ionized water is adjusted to 8.5 or more by the electrolytic washing water adjusting means, and the washing is performed under the conditions of a water temperature of 55 ° C. or more and a washing time of 15 minutes or more. The emulsifying action of the oil and fat, the hydrolysis reaction of the protein, and the swelling action of the starchy substance by the alkaline ionized water are promoted, and the washing is effectively performed.

The third aspect of the present invention is the first aspect of the present invention.
In addition to the configuration, wash water to the dishes to wash the dishes
Switching between the injection means for injection and the injection intensity of the injection means
In dishwasher having a changeover means that, at least a
Cleaning is performed with only "weak" injection strength of the acidic ion water used in the first cleaning step, so that the dirt adheres to the inner wall of the cleaning tank without dispersing the oil and dirt aggregated by the acidic ion water again. Can be prevented.

[0044] And also, the invention described in claim 4, wherein
In addition to the configuration of the invention described in item 2, for washing dishes
Injecting means for injecting washing water into tableware, and injecting the injecting means
The first configuration is provided with a switching means for switching the intensity.
Injection intensity of acidic ion water used for washing process
Washing, alkaline as pH 8.5 or more as washing water
Using ion water, water temperature 55 ° C or more, cleaning time 15 minutes or more
Washing is performed under the above conditions with the jetting strength of the washing water in the washing process set to "strong" , so that it floats on the dishes due to the emulsifying action of the oil and fat by alkaline ionized water, the hydrolysis reaction of proteins and the swelling action of starch. The dirt can be discharged more effectively.

[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 showing a change in the amount of fats and oils depending on the pH of acidic ionized water.

FIG. 6 shows acidic ionized water used in the first washing step .
FIG. 4 is a diagram showing a change in a cleaning index when a cleaning time is changed .

FIG. 7 is a diagram showing a change in a cleaning index depending on the pH of alkaline ionized water.

FIG. 8 is a diagram illustrating a second process of washing with alkaline ionized water .
It is a figure showing change of a washing index when changing the interval .

FIG. 9 is a view showing a specific example of a washing step when various washing waters are used in the dishwasher of FIG. 1;

FIG. 10 is a sectional view of a main part of a conventional dishwasher.

Continuation of the front page (72) Inventor Takeo Abe 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-6-319673 (JP, A) JP-A-6-296572 (JP) JP-A-58-173525 (JP, A) JP-A-4-49936 (JP, A) JP-A-8-47471 (JP, A) JP-A-8-47473 (JP, A) JP-A-3-33633 (JP, A) JP-A-6-197857 (JP, A) JP-A-5-26051 (JP, U) JP-A-7-37028 (JP, U) JP-B-49-29330 (JP, A) B1) Jikken 46-31818 (JP, Y1) Jikken 46-31817 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 15/00-15/46

Claims (4)

(57) [Claims] A water supply means for sending 1. A water, the water supply and water electrolyzed, the electrolytic washing water adjusting means for adjusting an acidic ion water and alkaline ionized water, a cleaning vessel for performing the dishes were housed washed, A drain means for discharging water in the washing tank to the outside of the machine, wherein the washing and draining steps are repeated a plurality of times, so that the dishwasher for washing and rinsing the dishes is the first one of the washing steps repeated a plurality of times. Washing
A dishwasher characterized by comprising a washing means for washing with an acidic ionized water of H6.0 or less under conditions of a water temperature of 40 ° C or more and a washing time of 10 minutes or less. A water supply means for sending wherein water, the water supply and water electrolyzed, the electrolytic washing water adjusting means for adjusting an acidic ion water and alkaline ionized water, a cleaning vessel for performing the dishes were housed washed, A drain means for discharging water in the washing tank to the outside of the machine, wherein the washing and draining steps are repeated a plurality of times, so that the dishwasher for washing and rinsing the dishes is the first one of the washing steps repeated a plurality of times. Washer
The process is a washing process of washing with acidic ionized water.
At least one of the subsequent washing steps is performed using pH as washing water.
Using alkaline ionized water of 8.5 or more, water temperature 55 ° C
A dishwasher comprising a washing means for washing under a condition of a washing time of 15 minutes or more. 3. In addition to the structure of claim 1, washing dishes.
Means for injecting washing water into tableware for
Dishwasher with switching means for switching the injection intensity of the stage
In at least the acidic ionic water used in the first washing step
Tableware characterized by washing with only a weak injection intensity
A dishwashing method used for washing machines. 4. In addition to the constitution of claim 2, the dishes are washed.
Means for injecting washing water into tableware for
Dishwasher with switching means for switching the injection intensity of the stage
In, the injection intensity of the acidic ion water used in the first cleaning step
Wash as “weak” and use alkaline ionized water with a pH of 8.5 or more as washing water.
Wash at a water temperature of 55 ° C or more and a wash time of 15 minutes or more
Cleaning with the cleaning water jet strength of the cleaning process to be "strong"
For washing dishes used in dishwashers
Law.