JPH0624502B2 - Automatic dishwashing method and apparatus - Google Patents

Description

The present invention relates to an automatic dishwashing method and an automatic dishwashing method for preventing impurities from adhering to electrodes during washing and replenishing an appropriate amount of detergent in a washing solution. It relates to the device.

(Prior Art) Generally, an automatic dishwashing device has a dishwashing unit for washing dishes by ejecting washing liquid from a nozzle, and a washing liquid tank provided below the dishwashing unit. The washing liquid in the washing liquid tank is a dishwashing unit. It is pumped up to and washed and returned to the washing liquid tank for reuse, and the detergent in the washing liquid is constantly replenished by an automatic detergent supply device attached to the dishwashing machine.

The parts of the automatic detergent supply device are roughly classified into (1) a main body of the automatic detergent supply control device, (2) a detergent injection device (an overflow hopper in the case of powder detergent, an injector, a tube pump in the case of liquid detergent), ( 3) It is divided into three detergent concentration detection electrodes.

The detergent concentration detection electrode, which is the main part of the automatic detergent supply device, is installed in the cleaning liquid tank, and the detergent concentration of the cleaning liquid is detected during operation of the cleaning device. The detergent concentration is constantly detected by the electric resistance value (electrical conductivity) of the electrode. I am trying. Then, when this electric resistance value changes from the electric resistance value at the time of initial setting determined based on the set concentration of the detergent, this electric signal is sent to the control device, whereby the control device opens and closes the detergent injection device, The detergent is automatically injected into the cleaning liquid.

However, if this concentration detection electrode is used for a long time, calcium, magnesium, etc., contained in the cleaning liquid,
The scale adheres to and deposits on the electrodes, resulting in reduced electrical conductivity and increased electrical resistance. When the electric resistance increases, the electric resistance becomes equal to the electric conductivity at the time of initial setting, so that the supply amount of the detergent increases, and thus the detergent is supplied in an amount larger than necessary.

(Problems to be Solved by the Invention) In order to suppress such an excessive supply of detergent, the cleaning liquid tank, particularly the detergent concentration detection electrode, has conventionally been regularly cleaned. It takes a lot of time and effort. In addition, the amount of scale adhered to the detection electrode due to calcium or the like increases with time even during one cleaning, and thus a large amount of detergent is supplied over time during one cleaning. However, this cannot be dealt with by regular cleaning of the cleaning liquid tank or the detection electrode, and an effective prevention method has not been found.

(Means for Solving Problems) In order to solve the above problems, in the present invention, a washing liquid is caused to flow, and dishes are washed under the water flow.
The counter electrode of the electrode is configured in an automatic dishwashing apparatus in which the detergent concentration in the cleaning liquid is detected by the resistance value of the electrode installed in the cleaning liquid and the detergent is replenished with the detergent based on the detected value. An automatic dishwashing method in which a floating motion ring is attached to an electrode rod, the floating motion ring is allowed to float under a water flow of a cleaning liquid, and dishware is washed while polishing the side wall surface of the electrode rod with the inner wall surface of the floating motion ring. And that device is proposed.

(Operation) In the present invention, since the floating motion ring is inserted through the electrode rod forming the counter electrode of the electrode, the ring floats in accordance with the water flow of the cleaning liquid, which causes calcium and magnesium on the surface of the electrode rod during cleaning. It becomes difficult for the scale to adhere due to factors such as the above, and the scale once adhered is likely to be peeled off. Therefore, in the present invention, scales due to calcium, magnesium, etc. do not adhere to the surface of the electrode rod even during dishwashing, and therefore the detergent concentration in the washing tank can be correctly detected and an excessive amount of detergent supply can be prevented. it can.

(Embodiment) Hereinafter, the present invention will be described based on an illustrated embodiment.

1 is a dishwasher used in the present invention. Washing machine 1
Inside, a rack 2 for placing dishes to be washed is installed in the upper stage, and a cleaning liquid tank 3 having an open upper side is disposed in the lower stage. A suction port strainer 5 attached to the lower end of the water supply pipe 4 is provided in the cleaning liquid tank 3, and a cleaning pump 6 is built in the water supply pipe 4 near the suction port strainer 5. Further, a cleaning nozzle 7a is provided above the rack 2 downward at the upper end of the water supply pipe 4, and an upward cleaning nozzle 7b is provided below the rack 2 at the middle end of the water supply pipe 4. Further, the cedar nozzles 8a and 8b are further provided above and below the rack 2.
The cleaning liquid tank 3 is provided with a drain plug 9.

On the other hand, at the upper end of the dishwasher 1, there is provided a powder detergent hopper 10 having an overflow pipe 10a therein, and a liquid detergent bottle 11 is arranged in parallel with the dishwasher 1 to provide a powder detergent hopper.
10 and the liquid detergent bottle 11 are inserted into the ends of pipes 13a and 13b branched from the water supply pipe 12, an injector 14 is provided in the pipe 13b, and the water supply pipe 12 has a controller 15
An electromagnetic valve 16 controlled by the above is provided, and the controller 15 is connected to an electrode 17 for detergent concentration measurement provided in the cleaning liquid tank 3.

As shown in FIG. 2, the detergent concentration measuring electrode 17 has positive electrode and negative electrode counter electrodes 18a and 18b. For example, stainless steel floating motion rings 19 and 19 are inserted into the counter electrodes 18a and 18b, and the tips thereof are inserted. Ring stoppers 20 and 20 are installed on the.

A rack 2 is used when washing dishes using the above washing machine 1.
When the tableware to be washed is placed on and the cleaning pump 6 is driven, the cleaning liquid is supplied from the suction port strainer 5 into the water supply pipe 4, and this cleaning liquid passes through the water supply pipe 4 and is ejected from the cleaning nozzles 7a and 7b. , Wash the dishes placed on the rack 2.

After the cleaning with the cleaning liquid is finished, the cedar liquid is ejected from the cedar nozzles 8a and 8b onto the tableware, and the tableware placed on the rack 2 is rinsed.

These washing machines and cedar solutions are returned to the washing solution tank 3, and the washing solution overflows from the drain plug 9 and drains when the washing solution tank 3 is full.

The detergent concentration in the cleaning liquid is measured by the resistance value of the electrode 17. If the resistance value of electrode 17 exceeds the default value, the controller
In response to an instruction from 15, the solenoid valve 16 opens and water flows through the water supply pipe 12 into the pipes 13a and 13b. The water flowing into the pipe 13a is supplied to the hopper 10 to dissolve the powder detergent, and this cleaning liquid is supplied into the cleaning liquid tank 3 by overflowing from the overflow pipe 10a.

On the other hand, when the water flowing into the pipe 13b passes through the injector 14, the liquid detergent in the bottle 11 is
Is sucked and supplied into the cleaning liquid tank 3. Thereby, the detergent concentration in the cleaning liquid is adjusted.

However, the detergent concentration in the cleaning liquid is detected by the resistance value of the electrode 17 and adjusted by the system as described above.In the present invention, the floating electrodes 19a and 19b are respectively formed on the counter electrodes 17a and 17b that constitute the electrode 17. It is inserted and this floating motion ring 19,19
Floats in accordance with the water flow in the cleaning liquid tank 3 generated by driving the cleaning pump 6, so that scales due to calcium or the like adhering to the counter electrodes 17a and 17b are peeled off, and accurate concentration detection can be performed.

As shown in FIG. 3, when the counter electrodes 17a and 17b of the positive electrode portion and the negative electrode portion are provided on one electrode rod, the floating motion rings 19 and 19 should be inserted through these positive electrode portion and the negative electrode portion. Just do it.

Further, as shown in FIG. 4, when the cleaning liquid tank 3 is used as a positive electrode or a negative electrode and one electrode rod is used as the counter electrode, the floating motion ring 19 may be inserted only in the electrode rod serving as the counter electrode.

(Effects of the Invention) In summary, according to the present invention, by attaching the floating motion ring to the electrode rod serving as the positive electrode or the negative electrode, adhesion of scale due to calcium, magnesium or the like to the electrode rod during cleaning is prevented, It is possible to accurately detect the detergent concentration in the cleaning liquid and prevent excessive supply of detergent.

[Brief description of drawings]

FIG. 1 is a schematic view of a dishwashing apparatus showing an embodiment of the present invention, FIG. 2 is an enlarged view of a detergent concentration detecting electrode portion of the same, and FIG. 3 is a view showing another embodiment of the present invention. , FIG. 4 is a view showing still another embodiment of the present invention. In the figure, 1 is a dishwasher, 2 is a rack, 3 is a washing liquid tank, 6
Is a cleaning pump, 7a and 7b are cleaning nozzles, 17a and 17b are counter electrodes,
19 is a floating ring.

Claims (2)

[Claims] 1. A washing liquid is caused to flow, and dishes are washed under the flowing water, and the detergent concentration in the washing liquid is detected by the resistance value of an electrode installed in the washing liquid, and the detergent liquid is detected based on the detected value. In an automatic dishwashing method in which a detergent is replenished therein, a floating motion ring is attached to an electrode rod forming a counter electrode of the electrode, and the floating motion ring is allowed to float under a water flow of a cleaning liquid, An automatic dishwashing method characterized in that dishwashing is performed while polishing the side wall surface of the electrode rod with the inner wall surface of the electrode. 2. A washing liquid is caused to flow, and dishes are washed under the flowing water, and the detergent concentration in the washing liquid is detected by the resistance value of an electrode installed in the washing liquid, and the detergent liquid is detected based on the detected value. In an automatic dishwashing machine in which detergent is replenished inside, a floating motion ring that floats under the flow of water and polishes the side wall surface of the electrode rod with its inner wall surface is attached to the electrode rod forming the counter electrode of the electrode. An automatic dishwasher characterized in that