JP2003135361A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate waste water, and eliminate fear for the corrosion of a water draining pipe of a building for a washing machine which washes articles to be washed using an alkaline water or an acidic water. SOLUTION: This dishwasher is equipped with a washing pump 10 and an arm 5, a heater 15, an electrolytic water-feeding section 22, a tap water-feeding section 20, and a control unit 51. In this case, the washing pump 10 and the arm 5 wash tableware using a washing water stored in a washing tank 2. The heater 15 heats the washing water. The electrolytic water-feeding section 22 is constituted in such a manner that tap water is electrolyzed to generate the alkaline water, and only the alkaline water is fed to the washing tank as the washing water. The tap water-feeding section 20 feeds tap water to the washing tank as it is. The control unit 51 controls the motions of the washing pump, the heater, the electrolytic water-feeding section, and the tap water-feeding section. Then, a washing process wherein tableware are washed using the alkaline water is performed. After the washing process, a heat-rinsing process wherein the tableware are sterilized while being rinsed using a hot water which is obtained by heating tap water by the heating means is performed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art Conventionally, a dishwasher is equipped with a device for producing electrolytic water (generation device) that separates alkaline water and acidic water by electrolyzing tap water to produce dishes using alkaline water. For example, Japanese Patent No. 3183118 discloses a method in which the dishes are washed and the dishes are cleaned, and then the dishes are rinsed with acidic water to sterilize the dishes.

In the dishwasher disclosed in the above patent publication, the water creating device is a so-called running water type, and during the washing process, tap water is made to flow into the water creating device to generate alkaline water and acid water. The alkaline water flowing out of the water creating device due to the inflow pressure of tap water is introduced into the washing tank, while the acidic water flowing out of the water creating device is discharged to the outside. On the contrary, during the rinsing process, acidic water is introduced into the washing tank and alkaline water is drained to the outside.

[0004]

In the above dishwasher, there is a problem that the amount of water used becomes large because a large amount of water is not used for cleaning and is discarded to the outside. Also, since a large amount of acidic water is drained, if the acidity is strong, the drainage pipe of a house may be corroded.

The present invention relates to a dishwasher, and an object thereof is to solve such problems.

[0006]

Means for Solving the Problems and Effects of the Invention A dishwasher according to the present invention which solves the above-mentioned problems uses a water storage unit for storing wash water and a washing process for washing dishes using the wash water stored in the water storage unit. Means, heating means for heating the wash water stored in the water storage part, and alkaline water and acidic water are produced by electrolyzing tap water from a water source, and only the produced alkaline water is used as wash water. Electrolysis water supply means configured to be supplied to the water storage section as a water supply source, tap water supply means for supplying tap water from a water source as raw water to the water storage section, the cleaning means, heating means, electrolysis water supply means And a control means for controlling the operation of the tap water supply means, performing a washing step of washing the dishes with the alkaline water stored in the water storage section, and after the washing step, heating the tap water stored in the water storage section By heating By using the high temperature water is characterized by performing the heating rinsing operation for sterilization, rinsing the dishes.

That is, in the structure in which alkaline water is generated by electrolysis, acidic water is also generated as a by-product. For this reason, the electrolyzed water supply means is configured to be able to supply acidic water to the water storage part, and after washing with alkaline water, acid water is generated in the rinsing step and rinsed with this acidic water to disinfect tableware. However, rinsing can be considered as a conventional method. However, in the present invention, the electrolyzed water supply means is configured to be able to supply only alkaline water to the water storage portion as wash water, and not dare to supply acidic water to the water storage portion as wash water for rinsing. Then, as the rinsing step, a high temperature rinsing step is performed in which tap water is heated to a high temperature and the tableware is rinsed with this high temperature water to remove bacteria.

Therefore, since the acidic water which may cause a lot of waste water is not used, it is possible to prevent the amount of water used from increasing. Moreover, there is no need to worry about corrosion of the drainage pipe of the house.

Further, in the dishwasher of the present invention,
The electrolyzed water supply means includes a running water generation device that electrolyzes inflowing tap water to generate alkaline water, and causes the generated alkaline water to flow out by the water pressure of the inflowing tap water. It is preferable that the supply flow rate to the water storage section is relatively reduced and the supply flow rate to the water storage section by the tap water supply means is relatively increased.

That is, the supply flow rate by the electrolytic water supply means and the supply flow rate by the tap water supply means are not the same, but the supply flow rate by the tap water supply means is made larger than the supply flow rate by the electrolytic water supply means. And With such a configuration, it is possible to generate alkaline water having a sufficient PH in the generating device and supply the alkaline water to the water storage unit without increasing the supply flow rate when the alkaline water is supplied, and to supply the tap water to the raw water. It is possible to shorten the water supply time by sufficiently increasing the supply flow rate when supplying as it is. Therefore, it is possible to supply water appropriately according to the water supplied to the water tank.

Further, in the dishwasher of the present invention,
As the washing step, a low temperature alkaline washing step of washing dishes with alkaline water in a water temperature range lower than the solidification temperature of protein stains attached to the dishes and a high temperature of washing dishes with alkaline water in a water temperature zone higher than the solidification temperature It is preferable to carry out the alkali cleaning step sequentially.

With such a structure, it is possible to drop and decompose the protein stains from the dishes without solidifying the protein stains by the low temperature alkaline washing process. Also, stubborn oil stains and sticky rice grains can be well removed by the high temperature alkaline washing process.

In this case, it is preferable that the alkaline water in the water storage section is replaced after the low temperature alkaline cleaning step and the high temperature alkaline cleaning step is performed with new alkaline water. By doing so, the alkaline water cannot be decomposed by the action of the alkaline water, and even if the protein dirt remains in the alkaline water stored in the water storage part, it will be drained. Can prevent coagulation.

Further, in this case, the electrolyzed water supply means includes a storage tank for storing alkaline water having a PH value higher than that of the alkaline water used for cleaning, and the alkaline water in the storage tank is diluted with tap water. It is preferable that the configuration is used. With such a configuration, it is possible to shorten the water supply time when using alkaline water. In particular, when the washing with alkaline water is performed a plurality of times, the effect becomes large.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A dishwasher which is an embodiment of the washing machine of the present invention will be described below with reference to the drawings. First, the dishwasher of 1st Embodiment is demonstrated.

FIG. 1 is a side sectional view showing the overall construction of the dishwasher according to this embodiment. A cleaning tank 2 (corresponding to a water storage portion of the present invention) is disposed inside the machine frame 1, and the cleaning tank 2
A door 3 whose lower end is axially supported is provided in the front opening of the so as to open in the front direction. In the cleaning tank 5,
A tableware basket 4 for accommodating tableware is arranged so that it can be pulled out. A rotatable arm 5 is provided at the center of the bottom of the cleaning tank 2, and a plurality of nozzles 5a are formed on the upper surface thereof at a predetermined angle. At the bottom of the cleaning tank 2,
A water tank 6 having a circulation port 7 and a drain port 8 on the side thereof is provided in communication with each other, and a residue left over from the tableware is dropped between the water tank 6 and the washing chamber 2. A mesh-shaped filter 9 for collecting vegetables is provided.

A cleaning pump 10 and a drainage pump 18 are arranged below the bottom surface of the cleaning tank 2. At the time of cleaning, the cleaning pump 10 delivers the water sucked from the circulation port 7 of the water storage tank 6 to the arm 5. At the time of drainage, the drainage pump 18 drains the water sucked from the drainage port 8 of the water storage tank 6 through the drainage hose 11 to the outside. Arm 5 and washing pump 10
Constitutes the cleaning means of the present invention.

A water supply mechanism 12 is disposed behind the cleaning tank 2. The water supply mechanism 12 will be described in detail later, but the water from the water supply mechanism 12 is poured into the cleaning tank 2 through a water supply port 13 provided on the rear wall of the cleaning tank 2. Cleaning tank 2
A water level detection device 14 including a float (not shown) for detecting the water level in the cleaning tank 2 is arranged behind the
The water in the cleaning tank 2 also flows into the water level detection device 14 through a communication port (not shown). A loop-shaped sheathed heater 15 (corresponding to the heating means of the present invention) is provided at the bottom of the cleaning tank 2 to warm the cleaning water and increase the temperature of the air in the cleaning tank 2 during drying.

A blower fan 16 is rotatably driven by a fan motor 17 at the rear of the cleaning tank 2. When the blower fan 16 is rotated, an intake port (not shown) formed on the back surface of the machine casing 1 is shown. The outside air sucked from (1) is introduced into the cleaning tank 2. In addition, the moist air in the cleaning tank 2 is discharged to the outside through an exhaust port (not shown) provided on the upper portion of the door 3.

The water supply mechanism 12 includes a water supply pipe 19 connected to the water supply port 13 of the cleaning tank 2 and a tap water supply unit 20 for supplying the tap water as raw water into the cleaning tank 2 through the water supply pipe 19.
(Corresponding to tap water supply means of the present invention) and electrolyzed water generator 21, and electrolyzed water supply unit 22 (electrolyzed water supply means) for supplying electrolyzed water generated by generator 21 via water supply pipe 19. Equivalent to) and.

The electrolyzed water supply unit 22 includes a first water supply valve 23 connected to a water supply source for tap water, a generator 21, a water conduit 24 for guiding the tap water from the first water supply valve 23 to the generator 21, and generation. Electrolyzed water generated by the device 21
And an electrolyzed water lead-out pipe 25 for sending to. The tap water supply unit 20 includes a second water supply valve 26 connected to a tap water supply source.
And a tap water outlet pipe 27 that sends tap water from the second water supply valve 26 to the water supply pipe 19.

Next, the construction of the electrolyzed water producing apparatus 21 is shown in FIG.
It will be described in detail based on. FIG. 2A shows a generation device 21.
2B is a front cross-sectional view of FIG. 2A, and FIG.
FIG.

The generator 21 is provided with a box-shaped resin-made electrolytic cell 28 having a thin depth and a little lateral length. Electrolyzer 2
Reference numeral 8 includes an upper case 29 having a lower opening and a lower case 30 having an upper opening. The lower case 29 and the upper case 30 are coupled via a packing 31 for sealing, and are fixed by screws 60 at appropriate positions. This generator 21
The (electrolysis tank 28) is arranged behind the cleaning tank 2 with its front surface facing the rear surface of the cleaning tank 2. Therefore, the space behind the washing tank 2 does not become large, and the dishwasher body does not become large. The generator 21 may be arranged laterally of the cleaning tank 2 with its front surface facing the side surface of the cleaning tank 2.

In the electrolytic cell 28, two diaphragm plates 31 are vertically arranged at a predetermined distance from each other, and upper partition plates 32 are horizontally arranged at the upper and lower ends of the diaphragm plates 31, respectively. The central electrolysis chamber 34, the front electrolysis chamber 35, and the rear electrolysis chamber 36 are defined by the lower partition plate 33. The diaphragm plate 31 is a so-called ion-permeable diaphragm having a large number of pores that allow ions to pass therethrough and hardly water. In this embodiment, the diaphragm plate 31 is made of polyethylene chloride, has a thickness of 0.17 mm, and has a water permeability of 400 cc /
A diaphragm of cm ² min, 700 mHg and 25 ° C. is used. The upper partition plate 32 and the lower partition plate 33 are made of rubber.

The central electrolysis chamber 34, the front electrolysis chamber 35, and the rear electrolysis chamber 36 are respectively provided with a central electrode plate 37 and a front electrode plate 3.
8. A rear electrode plate 39 is arranged. These electrode plates are
The surface of a plate-shaped base material is coated with a thin film member serving as an oxidation catalyst. In the present embodiment, the base material is made of titanium, and platinum is used as the thin film member.
The central electrode plate 37 has platinum coating on both sides,
The front electrode plate 38 and the rear electrode plate 39 are coated with platinum only on the surface facing the central electrode plate 37.

The terminal 37a of the central electrode plate 37 is formed near the right end of the lower end, and the terminal (not shown) of the front electrode plate 38 and the terminal 39a of the rear electrode plate 39 are located near the left end of the lower end. Has been formed. These terminals are led out to the outside through the bottom portion of the electrolytic cell 28. Lead wires from an energizing circuit (described later) are connected to these terminals. A packing 40 integrally formed with the lower partition plate 33 is attached to the roots of these terminals, and the packing 40 prevents water leakage from the lead-out portion of the terminal to the outside. Further, these terminals are held on the bottom surface portion of the electrolytic cell 28 via the packing 40.

On the top surface of the electrolytic cell 28, a tap water intake 41 is formed so as to project upward on the left side, and an electrolytic water intake 42 is formed so as to project upward on the right side. The tap water inlet 41 is connected to the water conduit 24, and the electrolytic water outlet 42 is connected to the electrolytic water outlet pipe 25. In the upper space formed between the top surface portion of the electrolytic cell 28 and the upper partition plate 32, an inflow passage 44 connected to the tap water intake 41 is formed in the central portion by the partition rib 43 hanging from the top surface portion. An outflow passage 45 connected to the electrolyzed water outlet 42 is formed around the inflow passage 44. Then, in the upper partition plate 32, an inflow port 46 of tap water that connects the inflow path 44 and the central electrolysis chamber 34 to each other.
Are formed. Further, an outlet 47 for electrolyzed water (alkaline water or acidic water) that connects the outflow passage 45 to the front electrolysis chamber 35 and the rear electrolysis chamber 36 is formed. The tap water intake 41, the inflow path 44, and the inflow port 46 form the inflow port of the present invention. Further, the electrolyzed water outlet 42, the outflow passage 45 and the outflow port 47 constitute the outflow port portion of the present invention.

A lower space formed between the lower partition plate 33 and the bottom surface of the electrolytic cell 28 constitutes a communication portion 48. The lower partition plate 33 is provided with a large number of communication holes 49 that connect the central electrolysis chamber 34, the front electrolysis chamber 35, the rear electrolysis chamber 36, and the communication portion 48. These three electrolysis chambers are connected at a lower position via a communication part 48. Support ribs 50 for supporting the lower partition plate 33 are erected from the bottom surface of the electrolytic cell 28 at a predetermined interval so that water can pass through.

In this embodiment, the three electrode plates 37, 3 are
The dimensions of 8 and 39 are 72 mm in height and 102 m in width.
m and thickness 0.5 mm. Also, three electrolysis chambers 3
The volumes of 4, 35 and 36 are all about 25 ml. Further, the distance between the electrode plates is set to 2.5 mm.

Further, in this embodiment, acidic water is generated in the central electrolysis chamber 34, and the front electrolysis chamber 35 and the rear electrolysis chamber 36 are produced.
To generate alkaline water in the central electrode plate 37
Is an anode, and the front electrode plate 38 and the rear electrode plate 39 are cathodes.

FIG. 3 is an electric system configuration diagram of a main part of the dishwasher. The control unit 51 (corresponding to the control means of the present invention) is C
It is mainly composed of a microcomputer including a PU, a ROM, a RAM, a timer, and the like, and the ROM stores a control program for performing the operation described later. The functions described below are achieved by the CPU executing various calculations and processes in accordance with this control program. An operation signal is input to the control unit 51 from various operation keys 52 such as a start key and a latch lever (not shown).
Detection switch 5 for detecting the locked state of the door 3 due to
3, detection signals are input from the temperature sensor 54 that detects the water temperature in the washing cabinet 2, the water level detection device 14, and the like. The control unit 51 causes the various display units 55 to perform a predetermined display. Moreover, the buzzer 56 is sounded as needed. Further, the control unit 51 controls the operations of the first water supply valve 23, the second water supply valve 26, the cleaning pump 10, the drainage pump 18, the heater 15, and the fan motor 17 via the load drive unit 57.

The central electrode plate 37, the front electrode plate 38, and the rear electrode plate 39 are connected to the output side of the control section 51 via an energizing circuit 58 composed of a transformer or the like. Control unit 51
When a signal for instructing energization is output from the energizing circuit 58, the energizing circuit 58 applies a DC voltage between the central electrode plate 37 which is an anode and the front electrode plate 38 and the rear electrode plate 39 which are cathodes.

In the dishwasher of this embodiment, in addition to the standard course of washing dishes with a detergent as the washing operation course, the alkaline water produced by the producing device 21 is used, so that the dishwashing without the detergent is performed. Equipped with a detergent zero course for cleaning. The control operation in the detergent zero course will be described below with reference to the flowchart of FIG.

When the user selects the detergent zero course and presses the start key, the detergent zero course cleaning operation is started under the control of the controller 51.

First, the pre-washing process is executed. The second water supply valve 26 is opened to supply water from the tap water supply unit 20 into the cleaning tank 2 (step S1). That is, tap water is supplied as raw water. At this time, the amount of water supplied from the tap water supply unit 20 is set to about 6 l / min. When the predetermined cleaning water level is reached, the second water supply valve 26 is closed to end the water supply. Next, the washing pump 10 is operated without operating the heater 15, and washing water (tap water at room temperature) is sprayed from the nozzle 5a of the arm 5 onto the dishes in the washing tank 2 to pre-wash the dishes (step S2). This removes rough stains on the tableware. When 2 minutes have passed from the start of prewashing, the washing pump 10 is stopped and the prewashing is completed. Then, the drainage pump 18 is operated to drain the water from the cleaning tank 2 (step S3).

Next, the same prewashing step as above is executed again. In this way, by performing the pre-washing process twice, the rough dishes are thoroughly cleaned, and then the main-washing process is performed.

This main washing step includes a low temperature alkaline washing step in which alkaline water is used for washing in a low temperature area (a temperature area where proteins are not solidified), and a high temperature alkaline washing step is performed in which alkaline water is used for washing at a high temperature. Consists of. First, a low temperature alkaline cleaning step is performed.

First, the first water supply valve 23 is opened to supply alkaline water as cleaning water into the cleaning tank 2 from the electrolytic water supply unit 22 (step S4). That is, the first water supply valve 2
3 supplies tap water into the generator 21 through the water conduit 24, and operates the energizing circuit 58 to operate the central electrode plate 3
A voltage is applied between 7 and the front electrode plate 38 and the rear electrode plate 39. The tap water that has flowed into the electrolytic cell 28 from the tap water inlet 41 passes through the inflow passage 44 and from the inflow port 46 to the central electrolysis chamber 3.
Enter within 4 (solid arrow in FIG. 2). The tap water is stored in the central electrolysis chamber 34, flows into the front electrolysis chamber 35 and the rear electrolysis chamber 36 through the communication portion 48, and is also stored in the front electrolysis chamber 35 and the rear electrolysis chamber 36 (see FIG. 2). Arrow from solid line to dashed line). As a result of the electrolysis, acidic water is generated in the central electrolysis chamber 34 which is the anode chamber, and alkaline water is generated in the front electrolysis chamber 35 and the rear electrolysis chamber 36 which are the cathode chambers. In this way, the alkaline water generated in the front electrolysis chamber 35 and the rear electrolysis chamber 36 is supplied with new tap water into the electrolyzer 28, that is, the tap water that newly flows into the central electrolysis chamber 34 from the inflow port 46. The washing tank 2 is pushed by the inflow pressure of water and flows out from the outlet 47, passes through the outflow passage 45, the electrolytic water outlet 42, the electrolytic water outlet pipe 25, and the water supply pipe 19.
It is introduced inside (dashed line arrow in FIG. 2).

Here, if the supply flow rate of the tap water supplied to the generator 21 is too large, alkaline water will flow out without sufficient electrolysis, and alkaline water having a sufficiently high PH will be washed. There is a possibility that it cannot be supplied into the tank 2. The same applies when the current flowing between the central electrode plate 37 and the front electrode plate 38 and the rear electrode plate 39 (hereinafter referred to as energization current) is small. In the present embodiment, the supply flow rate is set to about 900 ml / min so that the alkaline water flows out after sufficient electrolysis, and the applied voltage is adjusted so that the energization current value becomes about 1.5 A. ing. As a result, in this embodiment, alkaline water having a pH of about 10.5 is stored in the cleaning tank 2.

When the alkaline water is stored up to a predetermined cleaning water level, the second water supply valve 26 is closed and the operation of the energizing circuit 58 is stopped. Next, the heater 15 is operated to heat the alkaline water, and the washing pump 10 is operated to spray the alkaline water on the dishes to wash the dishes (step S5). Dirt adhering to the dishes is removed and further decomposed by the action of alkaline water. Thus, when the temperature of the alkaline water in the cleaning tank 2 reaches 40 ° C., the heater 15 and the cleaning pump 10 are stopped, and the alkaline cleaning at low temperature is completed. Then, the drainage pump 18 is operated to discharge the alkaline water from the cleaning tank 2 (step S6). Protein stains are mainly removed in this low temperature alkaline cleaning process. Here, since washing is performed in a temperature range lower than the coagulation temperature of the protein, it is possible to prevent the protein from coagulating and becoming difficult to fall off.

Next, a high temperature alkali cleaning step is executed. First, similar to the low temperature alkaline cleaning process, alkaline water is stored up to a predetermined cleaning water level (step S7).
Then, the heater 15 is operated to heat the alkaline water, and the washing pump 10 is operated to spray the alkaline water on the dishes to wash the dishes (step S8). Thus, when the temperature of the alkaline water in the cleaning tank 2 reaches 60 ° C., the heater 15 and the cleaning pump 10 are stopped and the alkaline cleaning at high temperature is completed. Then, the drainage pump 18 is operated to discharge the alkaline water from the cleaning tank 2 (step S9). In this hot alkali cleaning process, stubborn oil stains and sticky rice grains are removed. here,
Although washing is carried out in a temperature range higher than the coagulation temperature of the protein, protein stains are sufficiently removed in the previous low temperature alkaline washing step, so there is no concern about protein coagulation.

In the low temperature alkali cleaning process and the high temperature alkaline cleaning process, the minimum cleaning time is determined. In the low temperature alkaline cleaning process, cleaning is performed for 5 minutes even if the water temperature reaches 40 ° C., and the high temperature alkaline cleaning process is performed. In the process, washing is performed for 10 minutes even if the water temperature reaches 60 ° C. Therefore,
More reliably removes protein stains and oil stains.

When the main washing step using alkaline water is completed, a high temperature rinsing step is performed. Second water supply valve 26
Is opened and tap water is supplied as it is to the cleaning water level (step S10). Then, the heater 15 is operated to heat the water in the cleaning tank 2, and the cleaning pump 10 is operated to spray the water on the dishes to rinse the dishes (step S11). The water in the cleaning tank 2 is heated to about 70 ° C,
In the latter half of this high temperature rinsing, the tableware is sterilized by rinsing the tableware with hot water. Also, warming the dishes makes them easier to dry. Water temperature is 70 ℃
When the temperature reaches, the heater 15 and the cleaning pump 10 are stopped to finish the high temperature rinsing, and the drainage pump 18 drains the water (step S12).

Thus, when the high temperature rinsing process is completed,
Finally, the drying process is executed. In this drying process, the heater 15 and the blower fan 16 are operated to apply the air heated by the heater 15 to the tableware to dry the tableware (step S13). Upon completion of this drying process, the detergent zero course cleaning operation is terminated.

As described above, in the dishwasher of this embodiment, the amount of detergent used can be reduced by performing the detergent zero course of washing dishes with alkaline water.

Further, as the rinsing step for rinsing the dishes and sterilizing the dishes, high temperature rinsing using tap water is carried out without rinsing with acidic water, so there is a concern about corrosion of the drainage pipe of the house. Absent.

Further, since the low temperature alkali cleaning step and the high temperature alkaline cleaning step are sequentially performed as the main washing step, protein dirt can be dropped and decomposed from the dishes without solidifying by the low temperature alkaline cleaning step. Also, stubborn oil stains and sticky rice grains can be removed well by the high temperature alkaline washing process.
In particular, after the low temperature alkaline cleaning process, the alkaline water in the cleaning tank 2 is replaced and the high temperature alkaline cleaning process is performed with new alkaline water. Therefore, in the low temperature alkaline cleaning process, the alkaline water cannot be completely decomposed by the action of the alkaline water, and even if the protein dirt remains in the alkaline water stored in the cleaning tank 2, it is drained, so that in the high temperature alkaline cleaning process, Can prevent the coagulation of protein dirt.

Further, the generator 21 is constructed so that only alkaline water can be taken out when the water is supplied into the cleaning tank 2, so that the acidic water is not discarded when the alkaline water is supplied to the cleaning tank 2 (water to be discharged to the outside). Since there is no water), it is possible to eliminate waste water.

Further, the water supply mechanism 12 relatively increases the supply flow rate when the tap water is supplied as it is to the cleaning tank 2, and generates alkaline water by the generator 21 to supply the alkaline water. Since the supply flow rate is relatively small, it is possible to supply alkaline water having a sufficiently high PH without supplying too much supply flow rate when supplying alkaline water, and to supply tap water as raw water. The supply flow rate can be increased sufficiently to shorten the water supply time in the prewashing process and high temperature rinsing process. Therefore, it is possible to appropriately supply water to the cleaning tank 2 according to the water supply status.

Next, a dishwasher according to a second embodiment of the present invention will be described. In the dishwasher of this embodiment,
The configuration of the generating device 21 is different, and the rest is the same as the dishwasher of the first embodiment.

FIG. 5 (a) is a front sectional view showing the construction of the generator 21 in the dishwasher of the second embodiment, FIG.
(B) is an AA sectional view of (a).

In this generator 21, a tap water intake 411 (corresponding to the inflow port of the present invention) is formed at the central position of the bottom surface of the electrolytic cell 2. The tap water that has flowed in from the tap water inlet 411 flows into the central electrolysis chamber 34, the front electrolysis chamber 35, and the rear electrolysis chamber 36 through the communication portion 48 and the communication hole 49 (solid line and broken line arrow in FIG. 5). Then, the alkaline water generated in the front electrolysis chamber 35 and the rear electrolysis chamber 36 by electrolysis flows out from the outflow port 47 by the water pressure due to the introduction of new tap water, and the outflow passage 45 and the electrolyzed water intake port 4
2, introduced into the cleaning tank 2 through the electrolyzed water outlet pipe 25 and the water supply pipe 19 (broken line arrow in FIG. 5). The supply flow rate of tap water to the generator 21 in the second embodiment is the same as that in the first embodiment.

The tap water intake (inlet) may be formed in the lower part of the front surface of the electrolytic cell 28 so as to be connected to the lower part of the front electrolysis chamber 35 (in the vicinity of the communication part), and the lower part of the rear electrolysis chamber 36. It may be formed on the lower part of the rear surface of the electrolytic cell 28 so as to be connected to.

Finally, a dishwasher according to a third embodiment of the present invention will be described. FIG. 6 is a side sectional view showing the overall configuration of the dishwasher of this embodiment.

In the dishwasher of the third embodiment, the structure of the water supply mechanism is different from that of the first embodiment. Other configurations are the same. The water supply mechanism 121 uses the alkaline water for cleaning the tank 2.
It is composed of an electrolytic water supply unit 122 for supplying the raw water to the cleaning tank 2 and a tap water supply unit 123 for supplying the raw water to the cleaning tank 2.

The electrolyzed water supply unit 122 includes a generator 124 for generating alkaline water, a first water supply valve 125 for supplying tap water to the generator 124, and the generator 1.
Water storage tank 12 for storing alkaline water generated in 24
6 and a device 1 for producing an electrolysis auxiliary agent such as hydrochloric acid or saturated saline.
24, and an auxiliary agent supply device 127 for supplying 24.
The auxiliary agent supply device 127 is connected between the first water supply valve 125 and the generation device 124, that is, the water conduit 128. The tap water from the first water supply valve 125 is the water conduit 1
Is introduced into the generator 124 via 28 and the generator 12
The alkaline water generated in No. 4 is introduced into the water storage tank 126 via the electrolyzed water outlet pipe 129. Water storage tank 126
Is connected to the cleaning tank 2 by a water supply pipe 131 having an opening / closing valve 130. The tap water supply unit 123 is the second
A water supply valve 132 and a tap water outlet pipe 133 for supplying the tap water from the second water supply valve 132 into the cleaning tank 2 are provided. The structure of the generation device 124 is similar to that of the first embodiment.

In the dishwasher according to the third embodiment, by adding the electrolysis auxiliary agent, the generating device 124 generates strong alkaline water having a pH of about 12, for example. The generated strong alkaline water is stored in the water storage tank 126. Alkaline water is generated and stored during the prewash process. Then, in the low temperature alkaline cleaning process, the opening / closing valve 130 is opened to supply a part of the strong alkaline water in the water storage tank 126 into the cleaning tank 2, and the second water supply valve 132 is opened to supply tap water into the cleaning tank 2. To introduce. Thereby, the strong alkaline water is diluted, for example, PH10.
Store about 5 alkaline water in the cleaning tank 2. The remaining strong alkaline water in the water storage tank 126 is similarly diluted and used in the subsequent high temperature alkaline cleaning step. With such a configuration, the water supply time can be shortened and the total operation time can be shortened. In particular, when the cleaning process using alkaline water is performed a plurality of times, the effect becomes large.

As the generators 21 and 124 in the dishwashers of the first to third embodiments, the acidic water generated in the central electrolytic chamber 34, which is the anode chamber, is compared with the alkaline water supply amount. You may employ | adopt the thing of the structure which drains outside so that it may become a small amount. In such a case, waste water can be reduced as much as possible by performing high temperature rinsing as a rinsing step and not using acidic water.

Further, the tap water supply unit 20 may be eliminated, and a valve whose flow rate can be adjusted may be adopted as the first water supply valve 23 so that the electrolytic water supply unit 22 also serves as the tap water supply unit 20. (The electrolyzed water supply unit corresponds to tap water supply means). In this case, when tap water is supplied into the cleaning tank 2 as raw water, the generator 21 is not operated and the supply flow rate by the first water supply valve 23 is increased. That is, for example, about 6 l / min. On the other hand, when supplying the alkaline water into the cleaning tank 2, the generator 21 is operated and the first water supply valve 23 is operated.
Reduce the supply flow rate. That is, for example, about 900m
l / min.

Although the configuration of the dishwasher according to the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and various modifications are possible within the scope of the matters described in the claims. You can make changes.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall configuration of a dishwasher according to a first embodiment of the present invention.

2A and 2B show a configuration of an electrolyzed water producing apparatus in the dishwasher of the first embodiment, wherein FIG. 2A is a front sectional view of the producing apparatus 21, and FIG. 2B is an AA sectional view of FIG. .

FIG. 3 is an electrical system configuration diagram of a main part of the dishwasher according to the first embodiment.

FIG. 4 is a flow chart showing a control operation of a detergent zero course in the dishwasher of the first embodiment.

FIG. 5 shows a configuration of an electrolyzed water producing apparatus in a dishwasher according to a second embodiment of the present invention, (a) showing the producing apparatus 2
1 is a front sectional view of FIG. 1, and (b) is an AA sectional view of (a).

FIG. 6 is a side sectional view showing the overall structure of a dishwasher according to a third embodiment of the present invention.

[Explanation of symbols]

2 Cleaning tank (water storage part) 5 arms (cleaning means) 10 Cleaning pump (cleaning means) 15 Sheath heater (heating means) 20 Tap Water Supply Department (Tap Water Supply Means) 21 Generator 22 Electrolyzed water supply unit (electrolyzed water supply means) 51 control unit (control means) 126 Water storage tank

Continued front page    (72) Kenichi Sanada             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Tetsuo Harada             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3B082 BD01 BD04 CC02 CC05 DA02                       DC01 DC02

Claims (4)

[Claims] 1. A water reservoir for storing wash water, a cleaning means for washing dishes using the wash water stored in the water reservoir, a heating means for heating the wash water stored in the water reservoir, and a water source. Electrolyzed tap water to produce alkaline water and acidic water by separation, electrolytic water supply means configured to be able to supply only the generated alkaline water as wash water to the water reservoir, and tap water from a water source Tap water supply means for supplying water as raw water to the water storage section, and the cleaning means,
The heating means, the electrolyzed water supply means, and the control means for controlling the operations of the tap water supply means are provided, and a washing step is performed to wash the dishes with the alkaline water stored in the water storage section, and after this washing step, the water storage section is A dishwasher characterized by performing a heat rinsing step of sterilizing dishes while rinsing the dishes with high-temperature water obtained by heating the stored tap water with the heating means. 2. The electrolyzed water supply means includes a flowing water generation device for electrolyzing the inflowing tap water to generate alkaline water, and discharging the generated alkaline water by the water pressure of the inflowing tap water, 2. The supply flow rate to the water storage part by the electrolyzed water supply means is relatively reduced, and the supply flow rate to the water storage part by the tap water supply means is relatively increased. dishwasher. 3. In the washing step, a low-temperature alkaline washing step of washing the dishes with alkaline water having a water temperature lower than the solidifying temperature of protein stains adhering to the dishes and an alkaline water having a water temperature higher than the solidifying temperature are used. 2. A high temperature alkaline washing step of washing dishes is sequentially performed.
Dishwasher as described in. 4. The electrolyzed water supply means includes a storage tank for storing alkaline water having a PH value higher than that of alkaline water used for cleaning, and the alkaline water in the storage tank is diluted with tap water for use. The dishwasher according to claim 3, characterized in that.