JP2003220007A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher having an excellent washing effect even with less amount of a detergent than that used in conventional dishwashers. <P>SOLUTION: The dishwasher 1 is provided with an upper washing chamber 3 and a lower machine chamber 4. The lower machine chamber is disposed with a washing tank 8, a washing pump 9, a rinsing tank 10, and a rinsing pump 11. The washing tank 8 is connected with a water ionizer 15 and a detergent supply device 14. Alkaline water generated by the water ionizer 15 and detergent are supplied to the washing tank 8 for the use as washing water and non-ionized hot water is used as rinsing water. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for effectively washing items to be washed such as tableware by using electrolyzed water and a detergent.

[0002]

2. Description of the Related Art A dishwasher for washing objects to be washed such as dishes used in restaurants such as restaurants is equipped with a washing room in the upper part for accommodating the items to be cleaned in a rack and a rack in the lower part. Is equipped with a machine room. In the upper cleaning chamber, a cleaning nozzle is provided so as to be rotatable above the cleaning chamber and below the rack, and a rinsing nozzle is provided adjacent to the cleaning nozzle and concentric with the cleaning nozzle.

The machine room at the lower part of the cleaning chamber supplies a cleaning tank for storing cleaning water, a cleaning pump for supplying the cleaning water to the cleaning nozzle, a rinsing tank for storing the rinsing water, and a rinsing water for the rinsing nozzle. It is composed of a rinse pump and a detergent supply device for supplying detergent to the cleaning water.

Nowadays, when environmental problems are regarded as important, users demand a dishwasher with a minimal amount of detergent used. On the other hand, Japanese Patent No. 3183118 and Japanese Patent No. 3183271 disclose a dishwasher using acidic water and alkaline water in order to effectively remove dirt adhering to the object to be cleaned. . this is,
It is divided into an alkaline water generating chamber and an acidic water generating chamber by a diaphragm, and an electrolytic water generating device that electrolyzes water by providing electrodes in each chamber is equipped with a dishwasher to generate acidic water and alkaline water, and to generate alkaline water. By using water for washing and acid water for rinsing, the stains on the object to be washed are effectively removed.

[0005]

However, when dishwashing is performed by the above method, since acidic water is used,
There was a risk of corroding the inside of the dishwasher and water pipes. Further, aluminum has weak resistance to acids and alkalis, and if acidic rinse water remains on aluminum tableware, pots, etc., there is a risk of making holes.

Further, when a large amount of items to be washed such as dishes have to be washed in a restaurant, it is difficult to clean off the stains attached to the items to be washed only with alkaline water.

The present invention solves the above-mentioned problems, and provides a dishwasher which reduces the amount of detergent used in an ordinary dishwasher and effectively removes stains on the objects to be washed.

[0008]

The invention according to claim 1 is
The upper part was provided with a washing room for containing items to be washed such as dishes, a washing nozzle for injecting washing water, a rinsing nozzle for injecting rinsing water, and an overflow port for storing the washing water in the lower part. A washing tank, a washing pump for supplying washing water to the washing nozzle, a rinsing tank for storing high-temperature water of 70 ° C. to 90 ° C. to be used as rinsing water, and a rinsing pump for supplying the rinsing water to the rinsing nozzle. And an electrolytic water device for partitioning the acidic water generating chamber and the alkaline water generating chamber by a diaphragm, and providing an electrode in each chamber to electrolyze salt water to produce acidic water and alkaline water, and a detergent inside. The cleaning tank is provided with a detergent supply device for charging detergent into the cleaning tank, and the cleaning tank is connected to the detergent supply device and the alkaline water generating chamber side of the electrolyzed water device. The object to be cleaned is electrolyzed after being washed with the washing water in which the alkaline water generated by the electrolyzed water device and the detergent from the detergent supplying device are supplied to the washing tank at a constant ratio and the alkaline water and the detergent are mixed. It is characterized by rinsing with unrinsed rinsing water.

The invention according to claim 2 is characterized in that a connection pipe connecting the electrolyzed water apparatus and the cleaning tank is connected below the cleaning tank.

According to the third aspect of the present invention, the dishwasher is provided with a mineral removing device for removing minerals such as calcium contained in water, and the mineral removing device supplies water to the washing tank. It is characterized by doing.

The invention according to claim 4 is the dishwasher according to any one of claims 1 to 3, wherein the alkaline water is diluted with the cleaning water.

According to a fifth aspect of the present invention, in the water supply operation for supplying the cleaning water from a state where the inside of the cleaning tank is empty,
The amount of the alkaline water introduced during the water supply operation is 5 to 20% of the wash water storage capacity that can be stored in the wash tank.

The invention according to claim 6 is characterized in that the additional amount of the alkaline water after completion of the rinsing step is 3% to 16% with respect to the amount of rinsing water used.

The invention according to claim 7 is characterized in that the additional amount of the detergent after the rinsing step is determined by the pH value in the washing tank.

The invention according to claim 8 is the dishwasher according to claims 5 and 6, characterized in that, when the rinse water is replenished, the alkaline water is introduced and then the detergent is introduced.

The above invention has the following effects.

According to the first aspect of the present invention, the alkaline water produced by the electrolyzed water producing apparatus is used for washing, which contributes to removing dirt adhering to the article to be washed. Can also be small. Moreover, since no acidic water is used, the dishwasher, the water pipe, and the aluminum dishes are prevented from being corroded.

According to the second aspect of the invention, the pipe connecting the alkaline water generating chamber and the cleaning tank is provided below the cleaning tank, so that the alkaline water supplied into the cleaning tank is supplied and overflows immediately. I try to prevent it from leaking out of my mouth.

According to the third aspect of the present invention, the mineral removing device is attached to the dishwasher, and the water from which the mineral content has been removed is used as washing water to prevent the scale from adhering to the dishwasher. I have to.

According to the invention as set forth in claim 4, by using alkaline water as the cleaning water, it is possible to dissolve the salt remaining in the alkaline water and prevent corrosion in the dishwasher. ing.

According to the invention of claim 5, the introduction amount of the alkaline water is set to be at least 10% or more of the wash water storage capacity that can be stored in the wash tank.
We try to reduce the amount of detergent in the wash water.

According to the fifth aspect of the present invention, by supplying the additional amount of the alkaline water to 5% to 8% of the amount of the rinse water used, the concentration of the alkaline water in the wash water can always be kept constant. I am able to do it.

According to the sixth aspect of the present invention, it is possible to prevent the detergent from being overfilled by adding the detergent in an amount calculated by calculating the detergent supply amount from the pH value in the cleaning tank.

According to the seventh aspect of the present invention, the alkaline water is first supplied, and then the detergent is added to prevent the excessive detergent from being added.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a dishwasher showing an embodiment of the present invention, FIG. 2 is a diagram showing an operation sequence of water supply operation of the dishwasher showing an embodiment of the present invention, and FIG. 3 is a diagram showing the present invention. FIG. 4 is a diagram showing an operation sequence of a washing operation of the dishwasher showing the embodiment, and FIG. 4 is a diagram showing an operation sequence of a supply operation of the dishwasher showing the embodiment of the present invention. 1-4, the same code | symbol has shown the same part.

In FIG. 1, the main body 2 of the dishwasher 1 is
A cleaning chamber 3 for accommodating items to be cleaned such as dishes is formed in the upper part, and a machine room 4 is formed in the lower part. The cleaning chamber 3 is covered with a hood door 5 whose outer side moves up and down. In the upper part inside the cleaning room 3,
A cleaning nozzle 6 for spraying cleaning water while rotating, and a rinse nozzle 7 for spraying rinse water immediately below the cleaning nozzle 6.
However, in the lower part of the cleaning chamber 3, the cleaning nozzle 6 and the cleaning nozzle 6
A rinse nozzle 7 is provided immediately above the cleaning nozzle 6
The rinse nozzle 7 is concentrically and rotatably arranged.

The machine room 4 has a cleaning tank 8 for storing cleaning water and a cleaning pump 9 for supplying the cleaning water to the cleaning nozzle 6.
The rinsing tank 10 has a rinsing pump 11 which stores hot rinsing water having a temperature of about 80 ° C. and supplies the rinsing water to the rinsing nozzle 7.

An electrolytic water generator 15 for dividing an acidic water generating chamber and an alkaline water generating chamber by a diaphragm and providing an electrode in each chamber to electrolyze salt water to generate acidic water and alkaline water is used. The production chamber side is connected to the lower side of the cleaning tank 8. Further, the detergent supply device 14 having the detergent accommodated therein is also connected to the cleaning tank 8 so that the detergent is appropriately supplied to the cleaning tank 8.

In front of the electrolyzed water generator 15, there is provided a mineral remover 13 for removing minerals such as calcium contained in tap water such as tap water.

In the drawings used in the present invention, the mineral removing device 13 and the detergent supplying device 1 are provided outside the dishwasher 1.
4 and the electrolyzed water generator 15 are provided, but may be provided in the machine room 4 of the dishwasher 1.

The operation of the dishwasher 1 configured as described above will be described. The operation mode of the dishwasher 1 includes a water supply operation (FIG. 2), a cleaning operation (FIG. 3), and a supply operation (FIG. 4).

First, when the dishwasher 1 is turned on, a water supply operation is performed (FIG. 2). In the water supply operation, the solenoid valve 12 operates to change from the closed state to the open state.
Salt is added to water from which minerals such as calcium causing scale have been removed by an electrolytic water generator 15
Is electrolyzed, acidic water is generated in the acidic water generating chamber, alkaline water is generated in the alkaline water generating chamber, and only the alkaline water is supplied to the cleaning tank 8 (a in FIG. 2).
At this time, the amount of alkaline water supplied is, for example, about 10% of the wash water storage capacity of the wash tank 8. The alkaline water generation chamber side of the electrolyzed water generator 15 is connected to the cleaning tank 8, only alkaline water is used for cleaning the object to be cleaned, and the acidic water generated at the same time as the alkaline water cleans the foodstuffs. It shall be used for other purposes such as sterilization.

The non-electrolyzed water supplied into the rinse tank 10 becomes high temperature water of about 80 ° C. by the booster provided in the rinse tank 10. When the alkaline water is introduced into the cleaning tank 8 and the hood door 5 is closed, the high temperature water is sprayed from the upper and lower rinse nozzles 7 by the rinse pump 11 to the top surface of the cleaning tank 8. High-temperature water is supplied to the cleaning tank 8 through an opening (not shown) provided. When high-temperature water is supplied to the cleaning tank 8 and the water level in the rinse tank 10 drops, a water level sensor (not shown) provided in the rinse tank 10 senses the water level and supplies the water into the rinse tank 10 ( 2B). Although not shown, the water supplied to the rinsing tank 10 is also demineralized by the mineral removing device.

When high temperature water is stored in the washing tank 8 and becomes full, the rinsing pump 11 stops and the rinsing tank 1
Supply of hot water from 0 to the washing tank 8 is stopped (Fig. 2
D). Then, while the detergent is supplied from the detergent supply device 14 to the cleaning tank 8, the cleaning pump 9 is driven to inject the cleaning water from the cleaning nozzle 6 (e in FIG. 2). By doing so, it is possible to prepare cleaning water in which the alkaline water in the cleaning tank 8 and the detergent are uniformly mixed. After circulating the wash water in the wash tank 8 for a certain period of time,
The washing pump 9 stops, and the water supply operation ends. At this time,
The pH of the wash water in the wash tank 8 is, for example, between pH 10 and pH 11.

After the water supply operation is completed, a rack containing not-shown objects such as dishes is housed in the cleaning chamber 3 and the hood door 5
When is closed, the cleaning operation starts (Fig. 3). The cleaning operation includes three steps of operation including a washing step (a in FIG. 3), a pause (b in FIG. 3), and a rinsing step (c in FIG. 3).

In the washing step (a in FIG. 3), the washing water in the washing tank 8 is supplied by the washing pump 9 to the upper and lower washing nozzles 6 through the washing water pipes. The cleaning water is sprayed while rotating to remove dirt from the object to be cleaned. Here, since the cleaning water in which the alkaline water and the detergent are mixed is used, it is possible to remove dirt even when the amount of the cleaning agent used is smaller than that in the case of cleaning with the cleaning water in which only the cleaning agent is mixed.

When the washing step (a in FIG. 3) is completed, a pause for shifting to a rinsing step (c in FIG. 3) (b in FIG. 3)
Is provided. During this pause (b), the cleaning pump 9 is stopped and the water is drained from the cleaning nozzle 6.

In the rinsing step (C in FIG. 3), the rinsing pump 11 is driven, the rinsing water is supplied to the upper and lower rinsing nozzles 7, and the rinsing water is sprayed from the rinsing nozzle 7 to rinse the object to be cleaned. Be done. This rinse water is, for example, 8
Since high-temperature water of 0 ° C. is used, the cleaning water used in the cleaning process is rinsed, and the effects such as sterilization and disinfection of the object to be cleaned and drainage of the object to be cleaned are achieved.

After driving the rinsing pump 11 for a certain period of time, the driving of the rinsing pump 11 is stopped and the rinsing process is completed. When the rinsing process is completed, the cleaning operation is completed, and the user is informed by a buzzer or a lamp that the cleaning is completed. When the cleaning operation is completed, the supply operation (FIG. 4) is performed.

In the supply operation (FIG. 4), since the wash water is diluted by the rinse water flowing into the wash tank 8 in the rinse step, the wash water is adjusted to the initial concentration (concentration created by the water supply operation). To be done.

When the cleaning operation is completed, the alkaline water supply solenoid valve 12 is opened and alkaline water is supplied to the cleaning tank 8 (a in FIG. 4). This alkaline water supply is
For example, it is 6% to 7% of the amount of rinsing water used in the rinsing step (C in FIG. 3). This is because the rinse water sprayed from the rinse nozzle 7 flows into the cleaning tank 8.
About 60% to 70% of the rinse water flowing into the cleaning tank remains in the cleaning tank 8 and the rest overflows.
Therefore, in the rinsing step, the amount of rinsing water added to the washing tank 8 is about 60% to 70% of the amount of rinsing water used for rinsing. Then, in the water supply operation (FIG. 2), the alkaline water supplied to the cleaning tank 8 is 10
Since the water is diluted twice, if the amount of the rinse water remaining in the cleaning tank 8 is increased by 1/10, the cleaning water becomes the initial concentration.

When the above-mentioned amount of alkaline water is supplied,
The alkaline water supply solenoid valve 12 is closed. After that, the pH is measured by a pH meter (not shown) provided in the cleaning tank 8, and the detergent is supplied from the detergent supply device 14 into the cleaning tank 8 according to the pH value (B in FIG. 4).

After the detergent is supplied, the cleaning water may be stirred by the cleaning pump 9 and the cleaning nozzle 6 as in the water supply operation (FIG. 2), or the cleaning operation may be continued without stirring (FIG. 3).
It is okay to proceed to.

Although the embodiment of the present invention has been described with reference to the drawings, the present invention is not limited to this.

[0046]

The above invention has the following effects.

According to the first aspect of the present invention, the alkaline water produced by the electrolyzed water producing apparatus is used for washing, which contributes to removing dirt adhering to the article to be washed. Can also be small. Further, since no acidic water is used, it is possible to suppress corrosion of the dishwasher, the water pipe, the aluminum dish and the like.

According to the second aspect of the present invention, the pipe connecting the alkaline water generating chamber and the cleaning tank is provided on the lower side of the cleaning tank, so that the alkaline water supplied into the cleaning tank is supplied and overflows immediately. It can be prevented from flowing out from the mouth.

According to the third aspect of the present invention, the scale is attached to the dishwasher by attaching the mineral removing device to the dishwasher and using water from which minerals in the water are removed as washing water. You will be able to prevent it.

According to the fourth aspect of the present invention, by using alkaline water as the cleaning water, it is possible to dissolve the salt remaining in the alkaline water and prevent corrosion in the dishwasher.

According to the fifth aspect of the present invention, the amount of the alkaline water introduced is set to 5% to 20% of the wash water storage capacity that can be stored in the wash tank, thereby reducing the amount of detergent in the wash water. be able to.

According to the sixth aspect of the present invention, by supplying the additional amount of the alkaline water to 3% to 20% of the amount of the rinse water used, the concentration of the alkaline water in the wash water can be always kept constant. it can.

According to the seventh aspect of the present invention, it is possible to prevent the detergent from being overfilled by adding the detergent in an amount calculated from the pH value in the washing tank to calculate the detergent supply amount.

According to the eighth aspect of the present invention, by supplying alkaline water first and then adding the detergent, it is possible to prevent the addition of the excessive detergent.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a dishwasher showing an embodiment of the present invention.

FIG. 2 is a diagram showing an operation sequence of a water supply operation of the dishwasher showing the embodiment of the present invention.

FIG. 3 is a diagram showing an operation sequence of a cleaning operation of the dishwasher showing the embodiment of the present invention.

FIG. 4 is a diagram showing an operation sequence of a supply operation of the dishwasher showing the embodiment of the present invention.

[Explanation of symbols]

1 dishwasher 2 body 3 washing room 4 machine room 5 hood door 6 cleaning nozzle 7 Rinsing nozzle 8 washing tank 9 Washing pump 10 rinse tank 11 Rinse pump 12 Alkaline water supply solenoid valve 13 Mineral removal equipment 14 Detergent supply device 15 Electrolyzed water generator

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiromi Saito             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Hideo Hasegawa             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 3B082 BD01 CC02

Claims (8)

[Claims] 1. A washing chamber for containing an object to be washed such as dishes, a washing nozzle for injecting washing water, a rinsing nozzle for injecting rinsing water, and an overflow at an upper portion for storing rinsing water in the lower portion. A washing tank provided with a mouth, a washing pump for supplying washing water to the washing nozzle,
A rinsing tank that stores high-temperature water of 90 ° C. and uses it as rinsing water, a rinsing pump that supplies the rinsing water to the rinsing nozzle, and a partition membrane that divides the water into an acidic water generating chamber and an alkaline water generating chamber. An electrolytic water apparatus for providing an electrode to electrolyze salt water to produce acidic water and alkaline water, and a detergent supply apparatus for accommodating the detergent therein and for putting the detergent into the cleaning tank are provided. The cleaning tank is connected to the detergent supply device and the alkaline water generating chamber side of the electrolyzed water device, and the object to be cleaned has a constant amount of alkaline water generated by the electrolyzed water device and detergent from the detergent supply device. It is characterized in that it is supplied to the cleaning tank in a ratio and is washed with cleaning water in which alkaline water and a detergent are mixed, and then rinsed with rinsing water which is not electrolyzed. Dishwasher. 2. The dishwasher according to claim 1, wherein a connection pipe connecting the electrolyzed water apparatus and the cleaning tank is connected below the cleaning tank. 3. The dishwasher is provided with a mineral removing device for removing minerals such as calcium contained in water, and the mineral removing device supplies water to the washing tank. The dishwasher according to claim 1 or 2. 4. The dishwasher according to claim 1, wherein the washing water is used by diluting the alkaline water. 5. The amount of the alkaline water introduced during the water supply operation in which the cleaning water is supplied from the state where the inside of the cleaning tank is empty is 5% to 5% of the storage capacity of the cleaning water that can be stored in the cleaning tank. It is 20%, The dishwasher of Claim 1 thru | or 4 characterized by the above-mentioned. 6. The dishwasher according to claim 5, wherein the additional amount of the alkaline water after the rinsing step is 3% to 16% with respect to the amount of rinsing water used. 7. The dishwasher according to claim 1, wherein the additional amount of the detergent after the rinsing step is determined by the pH value in the washing tank. 8. The dishwasher according to claim 7, wherein the washing water is replenished after the rinsing step by introducing the alkaline water and then the detergent.