JPH1033448A - Dishwasher and two step washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently wash tablewear using a small amount of a detergent by using a washing liquid comprising a strong alkaline water which is prepared by electrolyzing water containing table salt and heated at a high and low temperatures and added by an alkaline detergent thereto. SOLUTION: The water from a water source is passed through a cation removing apparatus 2 and is added with table salt and electrolyzed to a strong alkaline water and strong acid water in an electrolyzing tank 3. The strong alkaline water in a tank 4A is heated and kept at a lower temperature and the strong alkaline water in tank 4B is heated and kept at a high temperature. Then the strong alkaline water kept at a low temperature is supplied to a washing case 8 and is added with an alkaline detergent from a detergent supply nozzle 19, the washing water is jetted from jetting nozzles 12a-12d, 14a, 14b using a water supply pump 10 to wash out soil adhered on the table wears. Then the strong alkali water kept at a high temperature is supplied to a washing case 8, added with an alkaline detergent, jetted from jetting nozzle 12a-12d, 14a and 14b and circulated by the water supply pump to conduct the washing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher and a two-stage washing method for dishes, and more particularly, to a large or small flat plate, a bowl, a bowl, and the like after a meal in a home or washing operation.
A dishwasher capable of efficiently washing food meals containing ingredients such as protein, oil, and starch attached to saji, spoons, chopsticks, etc., and a method for washing dishes in two steps using the dishwasher About.

[0002]

2. Description of the Related Art Conventionally, a spout port for sprinkling washing water is provided in a washing machine, and tap water is circulated as it is for washing.
Alternatively, cleaning water to which detergent or the like has been added is uniformly applied to the front and back surfaces of the contaminated tableware so as to circulate in the cleaning device. However, if tap water is used as it is, there is a problem that oil stains due to the recent westernization are hard to remove, unpleasant scum is often generated in the dishwasher due to unwashed scum, and detergents are used. Even if the added washing water is used, dirt including various components does not fall off. As a result, it is necessary to increase the use amount of the detergent to about 0.2% by weight or more. There were problems such as insufficient rinsing and a high concentration of detergent contained in the wastewater, which had an adverse effect on the environment.

[0003] In order to solve these problems, there has been proposed a washing machine using either or both of alkaline ionized water and acidic water obtained by electrolysis as washing water (Japanese Patent Laid-Open No. 6-319673). Gazette), when acidic water is used as the washing liquid, the protein food hardens to coagulate,
On the other hand, when alkaline water is used as a washing liquid, there is a certain degree of washing effect, but it is not possible to wash protein foods and starch, and it is not possible to prevent reattachment of dirt. Could not be washed. Also, strong alkaline water and strong acidic water obtained by electrolysis are used as washing water, and strong alkaline water is heated to about 40 ° C.
A washing and disinfecting apparatus has been proposed in which the washing is carried out by heating the washing water to be used as washing water, and after washing, rinsing with strong acid water is carried out.
Japanese Patent Application Laid-Open No.-296572), when a strong alkaline water is used as a washing solution, there is a washing effect by saponification action of fats and oils and action of dissolving protein. However, starch cannot be washed, and reattachment of dirt cannot be prevented. Tableware to which food residue from foods containing components such as oil and starch has adhered cannot be efficiently washed.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a flat plate to which food waste containing components such as protein, oil and starch is attached.
An object of the present invention is to provide a washing machine and a washing method capable of efficiently washing tableware such as bowls, teacups, saji, spoons, and chopsticks by using a small amount of detergent.

[0005]

Means for Solving the Problems As a result of repeated studies to solve the above-mentioned problems, the present inventor has found that strong alkaline water obtained by electrolyzing water to which salt is added is converted into two types of high and low temperatures. It is possible to solve the above-mentioned problem by sequentially cleaning dirty dishes with a cleaning solution obtained by adding an alkaline detergent to the strongly alkaline water controlled to these two temperatures as needed. The inventors have found and completed the present invention.

[0006] The invention of claim 1 of the present invention is a dishwashing apparatus for sequentially washing dishes using a washing solution comprising a strong alkaline water controlled to a high and low temperature range to which an alkaline detergent is added as required. A device for electrolyzing water supplied from the outside to produce the strong alkaline water and the strong acidic water, and a device for heating the strong alkaline water to control and supply the strong alkaline water to high and low temperature zones. And a device for supplying the alkaline detergent.

According to a second aspect of the present invention, in the dishwasher according to the first aspect, a tank for storing low-temperature strong alkaline water and a tank for storing high-temperature strong alkaline water are provided. I do.

[0008] According to a third aspect of the present invention, in the dishwasher according to the first or second aspect, the washing water after washing the dishes is neutralized with the strong acid water and drained. It is characterized by.

According to a fourth aspect of the present invention, there is provided the dishwasher according to any one of the first to third aspects, wherein the dishwasher is made of a strong alkaline water controlled at 50 to 55 ° C. to which an alkaline detergent is added as required. After washing the dishes using the washing liquid,
Subsequently, the tableware is washed using a washing liquid comprising strong alkaline water controlled at 70 to 80 ° C. to which an alkali detergent is added.

According to a fifth aspect of the present invention, there is provided the dishwasher according to any one of the first to fourth aspects, wherein an alkaline detergent containing an enzyme selected from the group consisting of a protease, an oil-degrading enzyme and a starch-degrading enzyme is used. It is characterized by doing.

According to a sixth aspect of the present invention, there is provided the dishwasher according to any one of the first to fifth aspects, wherein the dishes are washed with a low-temperature washing liquid to which 0 to 0.1% by weight of an alkaline detergent is added. After the washing, the dishes are successively washed using a high-temperature washing liquid to which 0.1 to 0.15% by weight of an alkaline detergent is added.

According to a seventh aspect of the present invention, there is provided a dishwasher according to any one of the first to sixth aspects, wherein strong alkaline water controlled at a low temperature range to which an alkali detergent is added as required. Washing the dishes using a washing liquid comprising the following steps, and then washing the dishes using a washing liquid comprising strong alkaline water controlled to a high temperature range to which an alkaline detergent has been added. It is a washing method.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, for example, salt is added to water such as tap water or well water, and electrolysis is performed.
Ten or more strongly alkaline waters are obtained, and the obtained strongly alkaline water is heated and controlled at, for example, 50 to 55 ° C., and one obtained by heating and controlling at 70 to 80 ° C., for example.
By successively washing dishes using a cleaning solution consisting of strong alkaline water controlled to a high and low temperature range in which alkaline detergent is added to a kind of strong alkaline water as needed, the oil can be washed with strong alkaline water. A good cleaning effect can be obtained due to the activating action, the dissolving action of proteins, the cleaning effect on starch, etc., and when an alkaline detergent is used, the cleaning action of the alkaline detergent, that is, the surface active action, the permeability to dirt, the renewal of dirt. The cleaning effect is greatly enhanced by the synergistic effect of the combination of the anti-adhesion effect and the like.

This makes it possible to wash starch, lipstick, etc., which has been difficult to wash in the past, without reattachment of dirt, and on dishes to which food residue containing ingredients such as proteins, oils, and starch has adhered. Can be efficiently washed. Conventionally, about 0.2% by weight of an alkali cleaning agent is usually used. However, according to the method of the present invention, an alkali cleaning agent may not be used in some cases. The amount may be about 05% to 0.15% by weight, and the use amount of the alkaline cleaning agent can be reduced by about 25% to 75%. In addition, there is an excellent effect that the cleaning time can be shortened. In the present invention, the method of applying the cleaning liquid is not limited, and for example, any of a storage type and a jet nozzle type can be used.

The pH of the strong alkaline water used in the present invention is not particularly limited, but is preferably 10 or more. If the pH is less than 10, the washing effect may be insufficient. The temperature after heating the strong alkaline water is not particularly limited as long as it is high and low. However, the low temperature is preferably 50 to 55 ° C. 5
If the temperature is lower than 0 ° C., the washing effect becomes insufficient. If the temperature exceeds 55 ° C., there is a risk of coagulation of the protein. In addition, when a protease, an oil-degrading enzyme, or a starch-degrading enzyme is added, the action of these enzymes is reduced. . The high temperature is preferably from 70 to 80C. If the temperature is lower than 70 ° C., the cleaning effect on rice grains may be insufficient. If the temperature is higher than 80 ° C., further improvement of the cleaning effect is difficult and uneconomical.

In the present invention, the order of using the low-temperature cleaning liquid and the high-temperature cleaning liquid is not particularly limited. However, a flat plate with food residue containing ingredients such as protein, oil and starch,
When washing tableware such as bowls, teacups, saji, spoons, and chopsticks, it is preferable to wash with a low-temperature washing liquid and then with a high-temperature washing liquid. Washing with a low-temperature washing solution removes protein stains and oil stains, and washing with this low-temperature washing solution has a pre-treatment effect and a soaking effect on stains such as rice grains and lipsticks, and then continues washing with a high-temperature washing solution. Thus, the problem of coagulation of protein can be avoided and dirt such as rice grains and lipstick can be sufficiently removed. Cleaning with this high-temperature cleaning solution has a bactericidal effect. In the dishwasher of the present invention, heating to a low temperature,
With a tank for storing controlled strong alkaline water and a tank for storing high-temperature, controlled strong alkaline water, keep low-temperature strong alkaline water and high-temperature strong alkaline water as needed This is preferable because the cleaning time can be shortened.

In the present invention, if an enzyme selected from the group consisting of a protease, an oil-degrading enzyme, and a starch-degrading enzyme is added to an alkaline detergent, the component-decomposing action (proteolytic action, oil-degrading action, starch-degrading action) of various enzymes can be obtained. ) Is added, so that the cleaning effect is greatly improved.

According to the present invention, if strong alkaline water as described above is used, even if the dishes are considerably soiled, 0.2% by weight can be obtained.
It is no longer necessary to add the above alkaline detergent. If necessary, just add 0.2% by weight or less of alkaline detergent,
Efficiently cleans flatware, bowls, bowls, saji, spoons, chopsticks, and other tableware to which food residue containing ingredients such as protein, oil, and starch has adhered, reducing the concentration of detergent contained in wastewater and being environmentally friendly. It becomes a washing method. But 0.05
If the amount of the alkaline detergent is less than or equal to% by weight, the cleaning effect may be insufficient depending on the stain. In the present invention, the adverse effect on the natural environment can be reduced by neutralizing and draining the washing water after washing the dishes using strongly acidic water obtained by performing the electrolysis.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram for explaining an example of a dishwasher and a washing method according to the present invention. In the figure, reference numeral 1 denotes a dishwasher, which is provided with calcium ions contained in water (indicated by an arrow) supplied from an external water source (not shown) such as a tap or a well. A cation removal device 2 filled with an ion exchange resin for removal is provided. The water from which calcium ions and the like are removed through the tap water or well water is provided in the cation removal device 2.
For example, salt is added and electrolyzed to obtain a strong alkaline water (pH
10 or more) and a strong alkaline water producing apparatus 3A in which an electrolytic cell 3 for producing strongly acidic water (about pH 2 to 4) is provided. The strong alkaline water produced by the electrolytic cell 3 is stored in tanks 4A and 4B in the strong alkaline water producing apparatus 3A, and the strong alkaline water in the tank 4A is heated to 50 to 55 ° C. by a heating / heating device (not shown). The strong alkaline water in the tank 4B is heated and maintained at 70 to 80 ° C. by a heating / warming device (not shown). The strongly acidic water produced by the electrolytic cell 3 is similarly stored in the tank 5 and, if necessary, heated / heated by a heating / warming device (not shown).
Will be maintained. The strong alkaline water stored in the tank 4A and the tank 4B or the strong acidic water stored in the tank 5 is washed through a pipe 7 by opening a switching valve 6 which is opened and closed by a signal from a control device (not shown) as necessary. Case 8
Sent to the bottom of

In a washing case 8 provided in the dishwasher 1, there is provided a washing room 9 for washing dishes and the like. The washing room 9 is generated by the electrolytic cell 3 and has a predetermined size. After the strong alkaline water heated and maintained at the temperature is sent through the pipe 7, the strong alkaline water is sent upward from the pipe 11 by the water supply pump 10 and is sprayed by the injection nozzles 12 a, 12 b, 12 c, and 12 d.
From the bottom of the shelf 13 containing tableware (not shown), and the table-like body 15 containing tableware (not shown) from ejection nozzles 14a and 14b provided thereabove. It is designed to be sprayed from below the tableware. Reference numeral 16 denotes a discharge valve, which is opened and closed by a signal from a control device (not shown). The discharge valve is opened when washing, rinsing, neutralization, or the like is completed, and dirty water or a rinsing liquid passes through a pipe 17 to wash dishes. It is discharged out of the vessel 1.

Although not shown, the electrolytic cell 2 is provided with a microporous diaphragm between an anode plate and a cathode plate made of platinum-plated titanium, and an appropriately controlled voltage is applied between the anode plate and the cathode plate. Is applied. Thereby, the electrolytic cell 3
Tap water and the like, from which cations have been removed, are added with salt (not shown) and electrolyzed to produce strongly alkaline water on the cathode plate side and strongly acidic water on the anode plate side. I have.

Reference numeral 18 in the figure denotes a device for supplying a liquid or powdery alkaline detergent or an alkaline detergent composition to which an enzyme selected from the group consisting of a protease, an oil-degrading enzyme, and a starch-degrading enzyme is added. An alkaline detergent or the like can be added into the cleaning case 8 from the detergent supply port 19 provided with an opening / closing valve which is opened and closed by a signal from a required amount at a required time. The inside of the alkaline detergent supply device 18 is divided into a plurality of parts, a detergent supply port is provided for each of the divided sections, and a different kind of alkaline detergent is put in each section, and each of the alkaline detergents is determined according to the degree of dirt and the type of dirt. May be used properly, or two or more alkaline detergents may be used in combination at a time or sequentially.

Reference numeral 20 in the figure denotes a wire mesh which allows the washing liquid to pass therethrough, but can filter out food residues such as rice grains and meat pieces. Further, a single plate-like body having a lattice-shaped ridge (not shown) is provided on the inner surface on the upper surface side of the cleaning case 8.

In the dishwasher 1 having the above-mentioned structure, after the shelves 13 and 15 are installed at predetermined positions in the washing chamber 9, when a start button (not shown) is pressed, an external water supply source such as a tap or a well is provided. The supplied water is subjected to cation removal through a cation removal device 2 filled with an ion-exchange resin, and cations are removed. Depending on electrolysis conditions set by a push button on an operation panel, the electrolytic cell 3 is made of tap water or the like to which salt is added. Is electrolyzed into strong alkaline water and strong acidic water, and the strong alkaline water generated is sent to tanks 4A and 4B, and the strong alkaline water in tank 4A is heated to 50 to 55 by a heating / heating device (not shown).
C., and the strong alkaline water in the tank 4B is heated and maintained at 70-80.degree. C. by a heating / warming device (not shown). The generated strong acid water is stored in the tank 5. First, an appropriate amount of strong alkaline water heated to 50 to 55 ° C. is supplied to the cleaning case 8 through the switching valve 6 and the pipe 7.

When an appropriate amount of strong alkaline water heated to 50 to 55 ° C. is supplied to the cleaning case 8, a necessary amount of an appropriate type of alkaline detergent or the like is added into the cleaning case 8 from the detergent supply port 19. It is dissolved and mixed in strong alkaline water, and if the heating is insufficient, it is further heated by a heater (not shown) of the washing case 8 and is maintained at 50 to 55 ° C. It is sent and is sprayed from the bottom of a shelf 13 containing tableware (not shown) to tableware from the spray nozzles 12a, 12b, 12c and 12d, and the spray nozzles 14a and 14b provided above the tableware.
From below, it is sprayed onto the tableware from below the shelf 15 containing the tableware not shown. Including the spouted alkaline detergent 5
Strongly alkaline water heated to 0 to 55 ° C (referred to as cleaning liquid)
Strikes the tableware to wash off the dirt, while the washing liquid scattered to the ceiling of the washing room 9 falls along the ridges provided on the ceiling surface and falls almost directly below, and also removes the dirt on the tableware from the upper surface side. The cleaning liquid is circulated by the water supply pump 10 so that the cleaning is sufficiently performed. Further, the sewage that has fallen to the bottom of the washing case 8 is filtered through the wire mesh 20 to remove the food waste, the food waste is collected on the wire mesh 20, only the cleaning liquid is circulated, and the tableware is washed for a certain period of time. Next, the switching valve 6 is switched,
A predetermined amount of strongly acidic water in the tank 5 is supplied from the conduit 7 to the dishwasher 1, the water supply pump 10 is rotated forward to perform rinsing and washing, and the dishes are sterilized and the drainage is neutralized. Then, the discharge valve 16 is opened and the water supply pump 10 is rotated in the reverse direction,
The waste water in the lower part of the pipe 11 and the washing case 8 is discharged.

Next, a suitable amount of strong alkaline water heated to 70 to 80 ° C. is supplied to the washing case 8 through the switching valve 6 and the pipe 7. When an appropriate amount of strong alkaline water heated to 70 to 80 ° C. is supplied to the cleaning case 8, a necessary amount of an appropriate kind of alkaline detergent or the like is added into the cleaning case 8 from the detergent supply port 19, and the strong alkaline water is added. If the heating is insufficient, the water is further heated by a heater (not shown) of the cleaning case 8 and maintained at 70 to 80 ° C., and is sent upward from the pipe 11 by the forward rotation of the water supply pump 10. The spray nozzles 12a, 12b, 12c, and 12d spray the tableware from below the shelf 13 containing the tableware (not shown), and the spray nozzles 14a and 14b provided above the tableware.
From below, it is sprayed onto the tableware from below the shelf 15 containing the tableware not shown. 7 including spouted alkaline detergent
Strongly alkaline water heated to 0 to 80 ° C (referred to as cleaning liquid)
Strikes the dishes and removes dirt in the same manner as above. The washing liquid is circulated by the water supply pump 10 to sufficiently wash the dishes, and the dishes are washed for a certain period of time.

Next, the switching valve 6 is switched to supply a predetermined amount of the strongly acidic water in the tank 5 from the pipe 7 to the dishwasher 1, and the water supply pump 10 is rotated forward to perform rinsing and washing. Sterilizes tableware and neutralizes wastewater. Then, the discharge valve 16 is opened, and the water supply pump 10 is rotated in the reverse direction so that the pipe 11
And the waste water in the lower part of the cleaning case 8 is discharged. Along with drainage,
A rinsing liquid such as tap water is temperature-controlled by opening a water supply valve (not shown) or water is supplied into the cleaning room at room temperature,
After the water supply pump 10 is rotated forward and rinsed and washed, the waste water is drained in the same manner.

A flat plate, a bowl, a teacup, a saji, to which the food residue containing components such as protein, oil, starch, etc. adheres as described above,
When you wash dishes such as spoons and chopsticks, you can remove protein stains and oil stains by first washing with a low-temperature washing solution, and washing with this low-temperature washing solution removes stains such as rice grains and lipstick. By having a pretreatment effect and a dipping effect, and by successively washing with a high-temperature washing solution, it is possible to avoid the problem of protein coagulation and sufficiently remove stains such as rice grains and lipstick. Washing with this high-temperature washing solution has a sterilizing effect. In addition, since strongly acidic water has a bacteriostatic action, while dishes and the like are kept more clean,
Generation of offensive odor due to food residue in the dishwasher itself is suppressed. Even if the dishes are considerably soiled, the dishes can be efficiently washed only by adding 0.2% by weight or less of an alkaline detergent, so that the concentration of the detergent contained in the wastewater is reduced. Since the washing water after washing the dishes is neutralized and drained using the strong acid water, the adverse effect on the environment can be reduced.

[0029]

The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention. (Experiment) (1) Types of dirt The dirt adhering to tableware can be roughly classified into starch dirt, protein dirt, and oil dirt. Rice dirt as starch dirt, eggs as protein dirt, and salad oil as oil dirt. Lipstick was selected. Eggs were used individually as samples because it is said that coagulation temperatures differ between white and yolk. (2) Adjustment method of dirt and adhesion method Starch dirt was prepared by cooking rice with a pressure of 0.5 using a rheometer.
The sample was attached to a slide glass at kg / cm ² and left at room temperature for 1 hour to obtain a sample. Further, the persistence after washing was confirmed by an iodine starch reaction. Protein stains were obtained by separately attaching egg yolk and white meat to a slide glass and leaving them at room temperature for 1 hour to prepare a sample. In addition, since the white body was transparent, the protein indicator amide black 10B was added and colored, and the degree of stain removal was confirmed. Further, the persistence of the yolk after washing was confirmed by an Amido-Schwarz reaction. For oil stains, oil after fried beef was used. That is, oily indicator oil Red O is added to a mixture of oil, broth and a trace amount of protein, and after attaching to a slide glass,
The sample left at room temperature for 1 hour was used as a sample. The lipstick is Lippiers <6> made by Rapiers (main component:
(Dibutylhydroxytoluene) was attached to a slide glass and left at room temperature for 1 hour to obtain a sample.

(3) Cleaning solution to be used The cleaning solution is a strong alkaline water producing device [commercial acidic water generator F
SW-S150 manufactured by Sanyo Electric Co., Ltd.] or a strong alkali water (pH 12.1 to 12.3) or a dishwasher alkaline detergent (trade name: WashMate S, Adeka Corporation) Clean Aid) was used in a predetermined amount. The temperature of the cleaning solution is 40, 45, 50, 55, 60, 6
5, 70, 75 and 80 ° C. In addition, in the case of rice grains and lipstick, there was no cleaning effect at 60 ° C, so the test was carried out at 63 to 80 ° C.

(4) Cleaning method Detergent concentration: 0%, 0.05%, 0.1%, 0.15%,
0.2% temperature of washing solution: Eggs may coagulate if the temperature exceeds 55 ° C.
The temperature was set to 0 ° C. and 55 ° C. The rice grains and the lipstick were set to 75 ° C., because the rice grains were less likely to fall below 70 ° C. and the lipstick was less likely to fall below 63 ° C. Six stained slide glasses were put into the washing solution under each condition, and washed with stirring for 5 minutes. (5) Evaluation method The amount of dirt adhering to the washed slide glass was evaluated visually and by photograph. (6) Experimental results Table 1 shows the results of the experiments. However, ◎: cleaning effect (large),
：: Cleaning effect (medium), Δ: Cleaning effect (small). It should be noted that the portions with () indicate that dirt was removed after washing, but the portions to which dirt had adhered before washing repelled water.

[0032]

[Table 1]

From Table 1, it can be seen that rice grains have a washing effect at a washing temperature of 75 ° C. at a detergent concentration of 0.15% by weight or more, and lipsticks have a washing effect at a washing temperature of 75 ° C. at a detergent concentration of 0.1% by weight or more. Was confirmed. The washing effect of the egg white was confirmed under all the washing conditions described above. The cleaning effect of the egg yolk and oil was confirmed under all the above-mentioned cleaning conditions. However, when the detergent was not added and when the detergent concentration was 0.05% by weight, the dirt was removed.
After the washing, water was repelled at places where dirt was attached. Therefore, in order to remove all dirt, it is found that it is desirable to remove proteins that coagulate during high-temperature washing in the first stage and raise the temperature of the washing solution in the second stage to remove lipsticks and rice grains that were difficult to remove conventionally. . That is, by first washing using a washing solution at a detergent concentration of about 0 to 0.1% by weight at a temperature of 50 to 55 ° C., the protein can be washed without coagulating, and at the same time, oil stains can be washed. It can be seen that starch such as rice grains can be washed by washing with a washing solution at 70 to 80 ° C. of about 1 to 0.15% by weight, and lipstick can also be washed.

[0034]

According to the present invention, a flat plate, a bowl, a tea bowl, a saji, to which food residue containing components such as protein, oil, starch, etc. adheres,
Tableware such as spoons and chopsticks can be efficiently cleaned using a small amount of detergent. That is, the protein adhered to the tableware is first coagulated by washing the tableware with a washing solution containing alkaline detergent, if necessary, in a strong alkaline water heated to a low temperature of about 50 to 55 ° C. It can be cleaned without oil and oil stains. And then, 7
Rice grains, which have been considered difficult to remove by washing with a washing solution obtained by adding about 0.1 to 0.15% by weight of an alkaline detergent to strongly alkaline water heated to a high temperature of about 0 to 80 ° C. Of lipstick, which is a current problem in dishwashers. Cleaning at a high temperature of about 70 to 80 ° C. has a bactericidal effect. If strong alkaline water heated to about 50 to 55 ° C. and strong alkaline water heated to about 70 to 80 ° C. are stored in separate tanks, the temperature can be kept at a predetermined temperature and the cleaning time can be shortened.

If an enzyme selected from proteolytic enzymes, lipolytic enzymes, amylolytic enzymes and the like is added to the alkaline detergent,
Component decomposition of various enzymes (proteolysis, oil decomposition,
(Starch decomposing action, etc.) is added, so that the washing effect is greatly improved. 0.2% by weight even if dishes are very dirty
By simply adding the following alkaline detergent, dishes to which food residue containing components such as protein, oil, starch, etc. adhere can be efficiently washed, so that the concentration of detergent contained in wastewater is reduced.
If the washing water after washing the dishes is neutralized and drained using strongly acidic water, the adverse effect on the natural environment can be reduced.
INDUSTRIAL APPLICABILITY The dishwasher and the dishwashing method of the present invention are economical because they have a simple configuration, and are highly effective, and therefore have high industrial utility value.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a dishwasher of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Tableware washing machine 2 Cation removal apparatus 3 Electrolysis tank 3A Strong alkaline water production apparatus 4A, 4B Strong alkaline water tank 5 Strong acidic water tank 6 Switching valve 7, 11, 17 Pipe line 8 Cleaning case 9 Cleaning room 10 Water supply pumps 12a, 12b, 12c, 12d, 14a, 14b Injection nozzles 13, 15 Shelf 16 Discharge valve 18 Alkaline detergent set supply device 19 Detergent supply port 20 Wire mesh

Claims (7)

[Claims] 1. A dishwasher for sequentially washing dishes using a washing liquid comprising strong alkaline water controlled to a high and low temperature zone to which an alkali detergent is added as required, and supplied from outside. An apparatus for electrolyzing water to be produced to produce the strong alkaline water and the strongly acidic water, an apparatus for heating the strong alkaline water and controlling and supplying the high and low temperature zones, and supplying the alkaline detergent A dishwasher comprising a device. 2. The dishwasher according to claim 1, further comprising a tank for storing low-temperature strong alkaline water and a tank for storing high-temperature strong alkaline water. 3. The dishwasher according to claim 1, wherein the washing water after washing the dishes is neutralized with the strong acid water and drained. 4. An alkaline detergent, if necessary.
The dishes are washed with a washing liquid composed of strongly alkaline water controlled at 0 to 55 ° C., and then the dishes are washed with a cleaning liquid composed of strongly alkaline water controlled at 70 to 80 ° C. to which an alkaline detergent is added. The dishwasher according to any one of claims 1 to 3, wherein the dishwasher is washed. 5. The dishwasher according to claim 1, wherein an alkaline detergent containing an enzyme selected from the group consisting of a protease, an oil-degrading enzyme and a starch-degrading enzyme is used. 6. A dishwasher is washed with a low-temperature washing solution to which 0 to 0.1% by weight of an alkali detergent is added, and then a high-temperature washing solution to which 0.1 to 0.15% by weight of an alkali detergent is added. The dishwasher according to any one of claims 1 to 5, wherein the dishware is washed using the dishwasher. 7. A dishwashing apparatus according to claim 1, wherein said dishwashing apparatus is provided with a washing liquid comprising a strong alkali water controlled to a low temperature range to which an alkali detergent is added as required. A two-step dishwashing method for washing dishes, comprising washing the dishes with a washing liquid consisting of strongly alkaline water controlled to a high temperature zone to which an alkali detergent has been added subsequently.