JPH09215651A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably obtain the alkaline and acidic washing water of a preset degree of hydrogen ion concentration (pH) by supplying (adding) a soluble strong electrolyte. SOLUTION: This dishwasher which washes dishes in a series of washing processes adds a strong electrolyte into water from an electrolyte storage tank 28 by the function of a valve 27 when the water supplied from a running-water tap passes through an electrolyte dissolution tank 29. And after an electrolytic washing water regulator 2 is supplied with the water treated above, the dishes are washed and rinsed with acidic and alkaline washing water several times.

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 electrolyzed ionized water as washing water.

[0002]

2. Description of the Related Art FIG. 10 is a cross-sectional view of a main part of a conventional dishwasher. The main body 100 of the dishwasher shown in FIG. 10 is a front door 2 which can be opened and closed for taking in and out dishes to be washed.
9 and rack 15 for installing dishes 16 to be washed
And a cleaning tank 12 for storing the cleaning water 48 in the lower direction of the rack 15, a cleaning nozzle 14 projecting almost in the center of the cleaning tank 12 and rotatable, and provided on the cleaning nozzle 14. A plurality of injection holes 49 and a heater 40 for heating the cleaning water 48 provided in the cleaning tank 12.
A cleaning pump 13 for supplying the cleaning water 48 to the cleaning nozzle 14, a discharge pump 17 for discharging the cleaning water 48 to the drain pipe 18, a water supply pipe 19 for supplying the cleaning water 48, and a water supply A water supply valve 47 for controlling the water supply from the pipe 19, a drying fan 43 for blowing air to dry the washed dishes, and a temperature for heating the air blown from the drying fan 43. A wind heater 44, a heat exchange duct 30 for discharging the supplied warm air outward from the main body, condensing water vapor and returning the water to the washing tank 12, and a CPU for controlling the entire dishwasher. And a control circuit 41 centered on.

Next, the cleaning operation of the dishwasher 100 will be described. First, the front door 29 is opened to store the dishes to be washed, the cooking utensil 16 and the like in a predetermined location of the rack 15, the rack 15 is placed on the washing tank 12, and a dedicated detergent is put in to start the operation. . Then, a predetermined amount of washing water 48 is passed through the water supply pipe 19 by the opening operation of the water supply valve 47.
Is supplied to the cleaning tank 12.

Subsequently, the cleaning water 48 pressurized by the operation of the cleaning pump 13 is rotated together with the detergent into the rotary cleaning nozzle 14.
Is sprayed onto the tableware 16 from the spraying holes 49 of No. 1, and cleaning is performed. Thereafter, a rinsing step and a drying step are performed.

[0005]

In the conventional dishwasher 100 as described above, when the washing process is started, the dishes 16
Contaminants adhering to the are mixed into the wash water 48, solid food residues are filtered by the filter 42 that collects the residues, while liquid contaminants such as fats and oils are mixed into the wash water 48 and the cleaning pump is used. It is sprayed again on the tableware 16 by 13.

In such a cleaning method, when the contaminants have a large amount of oil and fat, the cleaning power of the detergent is reduced, and the cleaning water mixed with the oil and fat that is not emulsified or dispersed is sprayed. It was redeposited and it was difficult to improve the cleaning performance.

As a method for solving such a problem, there is a method, as disclosed in Japanese Patent Application Laid-Open No. 56-68423, in which air is sent into cleaning water to inject it, or Japanese Patent Publication No. 6-73.
There is proposed a method of putting tableware on, such as disclosed in Japanese Patent No. 514. In addition, in order to improve the cleaning performance, Japanese Utility Model Laid-Open No. 5-26051 and Japanese Patent Laid-Open No. 6-3196.
As disclosed in Japanese Patent Laid-Open No. 73-73, a method of rinsing with alkaline water and then rinsing with acidic water is proposed.

However, in such a dishwasher, there is a problem that the cleaning performance is insufficient when the amount of oily stains is particularly large. Further, since one of the water obtained by electrolysis (one of the alkaline ionized water and the acidic ionized water) is discarded without being used for cleaning and rinsing, there is a problem that the water saving ability is not excellent. there were.

Further, when a large amount of hydrogen ion concentration (pH) buffering ion species such as carbonate ion is contained in the supplied tap water, alkaline wash water and acid wash water having a predetermined hydrogen ion concentration (pH) are generated. Since it cannot be obtained, there is a problem that the cleaning performance is deteriorated.

Therefore, the present invention provides a dishwasher which can obtain good cleaning performance even in the case where a large amount of oil and fat is contained in dish contaminants, and which can be effectively used without discarding the supplied water. It is intended to be provided. Another object of the present invention is to produce alkaline cleaning water and acidic cleaning water having a stable hydrogen ion concentration (pH) without being affected by the quality of tap water, and prevent deterioration of cleaning performance due to water quality. It is to provide a dishwasher.

[0011]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention has solved the above-mentioned problems, and the invention of claim 1 provides a water supply means for supplying water and electrolysis of water from the water supply means. Electrolytic cleaning water adjusting means for adjusting to cleaning water, a cleaning tank for storing and cleaning tableware, and a cleaning means for cleaning tableware with cleaning water stored in the cleaning tank and adjusted by electrolytic adjusting means, It is provided with a drainage means for draining the water in the cleaning tank to the outside of the machine and a supply means for supplying a water-soluble strong electrolytic substance to the water supply means.

The invention according to claim 2 is a water supply means for supplying water, an electrolytic cleaning water adjusting means for electrolyzing the water from the water supplying means to adjust it to cleaning water, and a cleaning for accommodating and cleaning the dishes. A washing tank for storing dishes in the washing tank and washing the dishes with the washing water adjusted by the electrolytic adjusting means; a draining means for draining the water in the washing tank out of the machine; and a water-soluble means for the water supply means. A supply means for supplying a strong electrolytic substance is provided, and an electrolyte dissolution tank for dissolving an electrolyte is arranged in the water supply means.

The invention according to claim 3 is the same as claim 1
In the invention described above, the electrolyte is composed of a substance containing sodium chloride as a main component. The invention according to claim 4 is the invention according to claim 1, wherein the electrolyte is composed of a solid material slightly soluble in water.

Further, the invention of claim 5 is the same as that of claim 4.
In the invention described above, the electrolyte is provided with a plurality of water passage holes. Furthermore, the invention according to claim 6 is the same as the invention according to claim 1, wherein the addition amount of the electrolyte is 10 mg /
It is set to 1 or more.

The invention according to claim 7 is a water supply means for supplying water, an electrolytic cleaning water adjusting means for electrolyzing the water from the water supplying means to adjust it to cleaning water, and a cleaning for accommodating and cleaning the dishes. A tank, a cleaning means for storing the dishes in the cleaning tank and washing the dishes with the cleaning water adjusted by the electrolytic adjusting means, a drainage means for draining the water in the cleaning tank to the outside of the machine, and a water-soluble means for the water supply means. And a measuring means for measuring the added amount of the electrolyte.

The dishwasher of the present invention has the above-mentioned structure. According to the invention of claim 1, a mechanism for adding a water-soluble strong electrolytic substance to the water supply mechanism is provided, so that the hydrogen ion concentration can be stably maintained at a predetermined value. It becomes possible to obtain alkaline cleaning water and acidic cleaning water of (pH), without being affected by water quality.
It is possible to improve the cleaning effect of dishes.

Further, according to the second aspect of the present invention, by providing a mechanism for adding a water-soluble strong electrolytic substance to the water supply mechanism, it is possible to stably supply alkaline washing water having a predetermined hydrogen ion concentration (pH) and acid. It becomes possible to obtain the washing water, the washing effect of the dishes can be improved without being affected by the water quality, and the water supply mechanism is provided with the electrolyte dissolving tank for dissolving the electrolyte, thereby supplying the water. It is possible to make the electrolyte concentration in water constant and to obtain a more stable hydrogen ion concentration (pH).

The invention according to claim 3 is the same as claim 1.
In addition to the action of the invention described, the electrolyte is composed of a substance containing sodium chloride as a main component, so that it becomes possible to supply the electrolyte in a general household, and the alkalinity of stable hydrogen ion concentration (pH) is maintained for a long period of time. Wash water and acidic wash water can be obtained.

Further, in the invention described in claim 4, in addition to the function of the invention described in claim 1, it is possible to obtain an effective and stable hydrogen ion concentration (pH) by a simple mechanism. Furthermore, in addition to the effect of the invention of claim 4, the invention of claim 5 can increase the amount of water supplied to the electrolytic cleaning water adjusting section.

Furthermore, according to the invention of claim 6, in addition to the effect of the invention of claim 1, a more stable hydrogen ion concentration (pH) can be obtained. Further, according to the invention of claim 7, by providing a mechanism for adding a water-soluble strong electrolytic substance to the water supply mechanism, it is possible to stably supply alkaline cleaning water and acidic cleaning water having a predetermined hydrogen ion concentration (pH). Therefore, it is possible to improve the washing effect of tableware without being affected by water quality, obtain a more stable hydrogen ion concentration (pH), and eliminate wasteful consumption of electrolyte. It becomes possible.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the dishwasher of the present invention will be described in detail below with reference to FIGS. 1, 2, 3 and 4. 1 is a cross-sectional view of a main part of a dishwasher according to a first embodiment of the present invention, and FIG. 2 is an electrolyte supply (addition) unit, an electrolytic cleaning water adjusting unit, and a dishwasher according to a first embodiment of the present invention. It is a principal part sectional view of a wash water tank part (the part shown by the code | symbol A of FIG. 1).

The structure of the main body will be described with reference to FIGS. 1 and 2. The conventional dishwasher 10 shown in FIG.
The same reference numerals are basically given to the same parts as 0 and the description thereof will be omitted. Here, the configuration of the water supply processing part different from the conventional dishwasher 100 will be described.

The first embodiment of the dishwasher 150 of the present invention is constructed as shown in FIGS. 1 and 2, and the tap water 50 supplied from the tap is the water supply pipe 1.
It is supplied to the electrolyte dissolution tank 28 via a valve 1 provided between 9 and 20. At this time, the valve 27 is operated for a certain period of time to discharge a certain amount of electrolyte from the electrolyte storage tank 26 to the electrolyte dissolution tank 28. The amount of electrolyte added is supplied in an appropriate amount by operating the valve 27 in response to signals from the conductivity sensors 60a and 60b provided in the water supply pipe 20 and the electrolyte dissolution tank 28. For example, if sodium chloride is added at 10 mg / l, the conductivity will be about 0.02.
Since the mS / cm rise, the conductivity sensors 60a, 60
An appropriate amount can be supplied by measuring the difference in b. In the first embodiment of the present invention, the conductivity sensor is used as the means for supplying an appropriate amount of electrolyte, but it is also possible to use other means for adding electrolyte, such as a metering pump, instead of the conductivity sensor. is there.

Subsequently, the tap water to which the electrolyte has been added is supplied to the electrolytic cleaning water adjusting section 2. Electrolytic cleaning water adjustment means 2
Will be described later. The cathode water pipe 3 taken out of the electrolytic cleaning water adjusting unit 2 is connected to the alkaline cleaning water tank 5, and the anode pipe 4 taken out of the electrolytic cleaning water adjusting unit 2 is connected to the acidic cleaning water tank 6. In the alkaline cleaning water tank 5, the alkaline cleaning water 7 supplied through the cathode water pipe 3 is stored up to a predetermined water level, and the acidic cleaning water tank 6 is stored.
The acidic cleaning water supplied through the anode water pipe 4 is stored up to a predetermined water level. Valves 9 and 10 are provided below the alkaline cleaning water tank 5 and the acidic cleaning water tank 6, respectively, and are connected to a cleaning water supply pipe 11 connected to the inside of the main body of the cleaning machine.

FIG. 3 is a sectional view showing the internal structure of the electrolytic cleaning water adjusting section 2 of FIG.

Referring to the drawing, a plurality of anode plates 21a and 22b and a plurality of cathode plates 22a and 22b are provided in the electrolytic cleaning water adjusting section 2 connected to the water supply pipe 20 connected to the water pipe faucet.
22c is a partition wall 23a-23 having a plurality of openings.
It is arranged so as to be opposed via d. Tap water 50 is partition wall 23
cathode plates 22a, 22 partitioned by a to 23d, respectively
cathode chambers 24a, 24b, 2 accommodating respective b, 22c
4c and the anode chambers 25a and 25b accommodating the anode plates 21a and 21b partitioned by the partition walls 23a to 23d, respectively.

Here, the cathode plate 22 of the electrolytic cleaning water adjusting section 2
When a DC voltage is applied between a, 22b, 22c and the anode plates 21a, 21b, the supplied tap water 50 is electrolyzed to pass through the openings of the partition walls 23a to 23d and the cathode chamber 24.
Cathode water (alkaline cleaning water) 7 for a, 24b, and 24c
However, in the anode chambers 25a and 25b, anode water (acid cleaning water) 8
Are respectively generated.

Next, referring to FIGS. 1, 2 and 3,
The operation of the dishwasher 150 according to the first embodiment of the present invention will be described.

After the dishes 16 to be washed are installed on the rack 15, when the washing operation is instructed, the valve 1 is opened.
Then, the water is supplied to the electrolyte dissolution tank 28 through the water supply pipe 19 and the water supply pipe 20 which are connected to the water pipe faucet.
At this time, the valve 27 is operated for a certain period of time to discharge a certain amount of the electrolyte from the electrolyte storage tank 26, and several tens mg / l of the electrolyte is added to the tap water in the electrolyte dissolution tank 28, and subsequently the tap water to which the electrolyte is added is added. Water is supplied to the electrolytic cleaning water adjusting unit 2. Electrolyte-added tap water supplied into the electrolytic cleaning water control unit 2 is electrically supplied to the anode plates 21a, 21b and the cathode plates 22a, 22b, 22c to generate anode water and cathode water by electrolysis. To be done. Cathode water is alkaline cleaning water that has a cleaning effect on oils and fats, starch and proteins, and anode water is an acidic cleaning water that has a function of aggregating dirt and has a bactericidal effect and a low content of dissolved minerals. is there.

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

In this way, 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 cleaned by controlling the open / close states of the valves 9 and 10. In accordance with the order of the cleaning water 48 through the cleaning water supply pipe 11 to the cleaning tank 12.
Is supplied as required. The tableware and the like may be arranged on the rack 15 while storing the alkaline cleaning water 7 and the acidic cleaning water 8 or after storing these.

Then, the first cleaning step is started. The washing water 12 is supplied to the washing tank 12, and the washing water 13 is pressurized by the washing pump 13 being energized,
The dishes 16 arranged on the rack 15 are washed by jetting from the jetting holes 49 of the rotating washing nozzle 14. At this time, since the heater 40 installed in the cleaning tank 12 is also energized, the cleaning water is circulated to be warmed and the cleaning effect is further improved.

The wash water 8 is drained to the general domestic 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 number of times of washing steps such as the second time, the third time, the fourth time, etc. are repeated, but from the washing to drainage using new washing water as in the case of the first washing step. After repeating the above series of steps, finally, as a rinsing step, a rinsing and washing step is performed using new acidic washing water 8 in the same manner as the washing step. With the above, a series of washing and rinsing steps of the dishes is completed, and then a drying process of the dishes is performed.

The drying step is performed by supplying warm air to the dishes 16 by the drying fan 43 and the warm air heater 44 provided on the upper side wall of the cleaning tank 12. The amount of wash water supplied to and stored in the tanks 5 and 6 corresponds to the amount of wash water required for each of the multiple washing steps and rinsing steps. Therefore, the predetermined water level at which the wash water is stored in the tanks 5 and 6 is a water level corresponding to the amount of wash water required for a plurality of washing steps and rinsing steps.

Further, the number of times of the cleaning process is, for example, 1 tableware.
It can be arbitrarily set according to the degree of contamination of No. 6. Also,
Here, the acidic cleaning water 8 is specified as the cleaning water used in the first cleaning process, but it is not limited to this. That is, depending on the degree of stains on the tableware 16, in particular, the amount of grease stains,
You may decide the washing | cleaning water of the washing process of the 1st time. Specifically, when the oil and grease stains are particularly severe, acid wash water is used as the first wash water. In addition, when the acidic cleaning water 8 is used for rinsing after the completion of the cleaning step, rinsing cleaning without water spots can be performed.

The drying process after the rinsing process is performed by supplying warm air to the dishes 16 by the drying fan 43 provided on the upper side wall of the cleaning tank 12 and the warm air heater 44. Note that the control of the time, temperature, water level (water amount), etc. in the series of cleaning steps is based on signals from various sensors (not shown) arranged at each part and each location.
Is done properly through. Specifically, the control device 41 controls the applied voltage of the electrolytic cleaning water adjusting unit 2 and the cleaning of the anode and the cathode, the opening / closing of the valves 1, 9, 10 and 27,
Storage amount of cleaning water tanks 5, 6; control of supply amount of cleaning water 7, 8; temperature control of cleaning water 7 and 8 by heating heater 40; driving of cleaning pump 13, drainage pump 17; drying fan 43 and temperature The operation or control of the wind heater 44 is automatically performed. Therefore, the cleaning water 7 and 8 can be automatically supplied / discharged according to the process, and the dishes 16 can be dried and stored.

FIG. 4 is a diagram showing the configuration of the electric circuit of the dishwasher 150 shown in FIGS. 1, 2 and 3, and FIG.
FIG. 5 is a detailed configuration diagram of a power supply circuit 31 for an electrolytic cleaning water adjusting unit in FIG. 4. Referring to FIG. 4, the AC power supplied to the dishwasher is supplied to each unit via fuse Fu, power switch S ₁ and door switch S ₂ . The power supply circuit 31 for the electrolytic cleaning water adjusting unit is on / off controlled by the water level switch S ₃ on the tank 7 side, the switch S ₄ on the tank 8 side and the pressure switch S ₁₂ , and the valve 1 is controlled by the switches S ₃ and S ₄ . The valve 9 is on / off controlled by switches S ₃ and S ₄ and a timer contact S ₆ . The valve 10 is on / off controlled by a switch S ₄ and a timer contact S ₇ . The cleaning pump 13 and the heating heater 40 are connected to the water level switch S ₅ and the timer contact S ₈ , the drain pump 17 is connected to the timer contact S ₉ , and the drying fan 43 and the warm air heater 44 are connected to the timer contact S 8.
On / off control is performed by ₁₀ and the temperature switch S ₁₁ . The control device 41 including the CPU is supplied with power by turning on the power switch S ₁ and the door switch S ₂ .

Referring to FIG. 5, a power supply circuit 31 for the electrolytic cleaning water adjusting section is provided with a power supply indicator lamp 33 on a primary side wiring 32 of a power transformer 34, and the electrolytic cleaning water adjusting section 2 is in operation. Is displayed. On the other hand, the secondary side wiring 38 of the transformer 34 is provided with a secondary side tap changer 35, and the secondary side tap changer 35 is connected to the anode plate 21 and the cathode plate 22 in the electrolytic cleaning water adjusting section 2 via the rectifier 36 and the smoothing capacitor 37. The applied voltage is adjusted. The voltage applied between the anode plate 21 and the cathode plate 22 is adjusted in order to adjust the hydrogen ion concentration (pH) of the cathode water and the anode water according to the purpose of cleaning.

Next, a concrete example of the actual washing process of the dishwasher 150 will be shown. FIG. 6 is a diagram for comparing the cleaning performance in a tabular form when the hydrogen ion concentration (pH) of the acidic cleaning water and the alkaline cleaning water is changed in the dishwasher of FIG. 1.

Referring to the drawing, the cleaning examples 1 to 4 and 5 are as follows.
The dish washing is performed by the first to sixth washing steps, and the washing example 6 is the dish washing performed by the first to fifth washing steps in the conventional dedicated detergent standard course. In FIG. 6, the cleaning ability of each cleaning example is shown by the corresponding glass cleaning rate. The higher the glass cleaning rate, the better the cleaning ability.

In FIG. 6, the glass cleaning rate tends to decrease as the hydrogen ion concentration (pH) of the acidic cleaning water and the alkaline cleaning water approaches neutral, and the hydrogen ion concentration (pH) of the acidic cleaning water is 6%. When the hydrogen ion concentration (pH) of the alkaline washing water reaches 8.0, the glass washing rate is reduced to the same level as the conventional dedicated detergent standard course.

In FIG. 7, a strong electrolyte (sodium chloride) is added to tap water of a quality that makes it difficult to obtain acidic cleaning water and alkaline cleaning water having a predetermined hydrogen ion concentration (pH), and the electrolytic cleaning water adjusting unit 2 is used. It is a figure which measured hydrogen ion concentration (pH) by producing acidic washing water and alkaline washing water.
In addition, the hydrogen ion concentration (pH) in the figure is the electrode material made of platinum plating on a titanium base material, and the water flow rate is 2 ml / mi of acidic water.
n is the measured value when the alkaline water is 2 ml / min.

FIG. 7 shows the effect of shifting the hydrogen ion concentration (pH) of the acidic cleaning water and the alkaline cleaning water by adding the strong electrolyte. Referring to the figure, as the addition amount of the strong electrolyte is increased, the hydrogen ion concentration (pH) of the acidic cleaning water and the alkaline cleaning water shifts to the acidic side and the alkaline side, respectively, and the addition amount is 10 mg / l or more. Then, the hydrogen ion concentration (pH) is such that a glass cleaning rate equal to or higher than that of the conventional dedicated detergent standard course can be obtained (see FIG. 5). Further, when a substance containing chlorine ions such as sodium chloride is used as the strong electrolyte, the redox potential of the acid wash water is significantly increased, so that the sterilizing action of the acid wash water effectively acts.

Next, a second embodiment of the dishwasher of the present invention will be described. The operation of the dishwasher of the second embodiment is the same as that of the first embodiment, The description is omitted. The water supply mechanism of the dishwasher of the second embodiment is configured as shown in FIG. 8, and in FIG. 8, 39 is a solid strong electrolyte slightly soluble in water (for example, calcium sulfate or rock salt). .

In the cleaning step, the water supplied from the water supply pipe 20 passes through the solid strong electrolyte 39 installed in the electrolyte dissolving tank 28, and then is supplied to the electrolytic cleaning water adjusting section 2 for acidic cleaning water and alkaline cleaning. The water is adjusted. At this time, since the solid strong electrolyte 39 is eluted in a trace amount in water, the electrolytic cleaning water adjusting unit 2 adjusts the acidic cleaning water and the alkaline cleaning water having a stable hydrogen ion concentration (pH) without being affected by the water quality. .

Next, a third embodiment of the dishwasher of the present invention will be described. The operation of the dishwasher of the third embodiment is the same as that of the first embodiment, and the description thereof will be omitted.

The solid electrolyte of the dishwasher of the third embodiment is constructed as shown in FIG. 9, and in FIG. 9, the solid strong electrolyte 39 is in the flowing direction of the water supplied from the water supply pipe. Since a plurality of holes 39a, 39b ... Are formed, the solid strong electrolyte can be efficiently dissolved even when the flow rate of the supplied water is high.

[0049]

Since the dishwasher of the present invention has the above-mentioned constitution, the invention according to claim 1 is provided with the supply means for supplying (adding) the water-soluble strong electrolytic substance to the water supply means. It becomes possible to stably obtain alkaline cleaning water and alkaline cleaning water having a predetermined hydrogen ion concentration (pH), and it is possible to improve the cleaning effect on tableware without being affected by water quality.

[0050] In the invention according to claim 2, the water supply means is provided with a supply means for supplying (adding) a water-soluble strong electrolytic substance, so that a stable hydrogen ion concentration (p) can be stably obtained.
It is possible to obtain the alkaline washing water and H) of H), the dish washing effect can be improved without being affected by the water quality, and an electrolyte dissolution tank for dissolving the electrolyte in the water supply means. By disposing, the electrolyte concentration in the feed water can be made constant, and a more stable hydrogen ion concentration (pH) can be obtained.

The invention according to claim 3 is the same as claim 1
In addition to the effects of the invention described above, since the electrolyte is composed of a substance containing sodium chloride as a main component, it becomes possible to supply the electrolyte in a general household, and the alkalinity of the hydrogen ion concentration (pH) is stable for a long period of time. Wash water and acidic wash water can be obtained.

Further, according to the invention described in claim 4, in addition to the effect described in claim 1, a stable hydrogen ion concentration (pH) can be effectively obtained by a simple mechanism.
Furthermore, in addition to the effect of the invention described in claim 4, the invention described in claim 5 can increase the amount of water supplied to the electrolytic cleaning water adjusting section.

Furthermore, in the invention described in claim 6, in addition to the effect of the invention described in claim 1, a more stable hydrogen ion concentration (pH) can be obtained.

In the invention according to claim 7, the water supplying means is provided with a supplying means for supplying (adding) a water-soluble strong electrolytic substance, so that a stable hydrogen ion concentration (p
It is possible to obtain alkaline washing water and H) of H) to improve the washing effect of dishes without being affected by water quality, and to obtain a more stable hydrogen ion concentration (pH). In addition, it is possible to eliminate wasteful consumption of electrolyte.

[Brief description of drawings]

FIG. 1 is a sectional view of essential parts of a dishwasher according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts of an electrolyte addition section, an electrolytic cleaning water adjusting section, and a cleaning water tank section in FIG.

FIG. 3 is a cross-sectional view showing an internal structure of an electrolytic cleaning water adjusting unit of FIG.

4 is a diagram showing a configuration of an electric circuit of the dishwasher of FIG.

FIG. 5 is a detailed configuration diagram of a power supply circuit for an electrolytic cleaning water adjustment unit in FIG.

FIG. 6 is a diagram for comparing the cleaning performance in a table format with various hydrogen ion concentrations (pH) in a dishwasher.

FIG. 7 is a diagram showing changes in hydrogen ion concentration (pH) of acidic cleaning water and alkaline cleaning water due to addition of a strong electrolyte.

FIG. 8 is a cross-sectional view of essential parts of a dishwasher according to a second embodiment of the present invention.

FIG. 9 is a cross-sectional view of essential parts of a solid strong electrolyte according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view of essential parts of a conventional dishwasher.

[Explanation of symbols]

 2 Electrolytic cleaning water adjustment unit 5 Alkaline cleaning water tank 6 Acidic cleaning water tank 7 Alkaline cleaning water 8 Acidic cleaning water 12 Cleaning tank 26 Electrolyte storage tank 28 Electrolyte dissolution tank 39 Solid strong electrolyte 50 Tap water 60a, 60b Conductivity sensor 150 Dishwashing Machine

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeo Abe 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation

Claims (7)

[Claims] 1. A water supply means for supplying water, an electrolytic cleaning water adjusting means for electrolyzing water from the water supply means to adjust it to cleaning water, a cleaning tank for storing and cleaning the dishes, and a tableware for the cleaning tank. Washing means for washing dishes with the wash water stored and adjusted by the washing water adjusting means, draining means for draining water in the washing tank to the outside of the machine, and supplying means for supplying a water-soluble strong electrolytic substance to the water supplying means And a dishwasher. 2. A water supply means for supplying water, an electrolytic cleaning water adjusting means for electrolyzing the water from the water supply means to adjust it to cleaning water, a washing tank for storing and cleaning the dishes, and the dishes for the cleaning tank. Washing means for washing dishes with stored washing water adjusted by the electrolytic adjusting means, draining means for draining water in the washing tank out of the machine, and supply for supplying a water-soluble strong electrolytic substance to the water supplying means And a means for supplying water, wherein an electrolyte dissolving tank for dissolving the electrolyte is provided in the water supplying means. 3. The dishwasher according to claim 1, wherein the electrolyte is composed of a substance containing sodium chloride as a main component. 4. The dishwasher according to claim 1, wherein the electrolyte is made of a solid material slightly soluble in water. 5. The dishwasher according to claim 4, wherein the electrolyte is provided with a plurality of water passage holes. 6. The dishwasher according to claim 1, wherein the amount of the electrolyte added is 10 mg / l or more. 7. A water supply means for supplying water, an electrolytic cleaning water adjusting means for electrolyzing the water from the water supply means to adjust it to cleaning water, a cleaning tank for storing and cleaning the dishes, and a tableware for the cleaning tank. Washing means for washing dishes with the wash water stored and adjusted by the washing water adjusting means, draining means for draining water in the washing tank to the outside of the machine, and supplying means for supplying a water-soluble strong electrolytic substance to the water supplying means And a measuring means for measuring the amount of electrolyte added, a dishwasher.