JP2755583B2 - Dishwasher - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial application field) The present invention relates to a dishwasher for washing by spraying water onto tableware.

(Prior Art) Conventionally, a dishwasher sprays water for a short time (for example, about 6 minutes) on tableware stored in a tableware basket to perform pre-washing, and then dissolves a detergent into the tableware. The main washing is performed by spraying water (hereinafter, referred to as a detergent liquid).

By the way, in a general household, for example, when the father goes home for work, the return of the father is delayed, so that the father may not have dinner at the same time, such as when the father has dinner later than other households. is there. In such a case, if you try to wash the dishes of a person who has eaten first and a person who has eaten later at once, the dishes of the person who has eaten first will be left dirty for a long time. As a result, dirt such as starch is dried and firmly adheres to tableware. In this case, it is difficult to remove the firmly attached dirt only by performing the pre-washing and the main washing. For this reason, if the meal time of the family is different, you have to wash the dishes each time you finish the meal,
There is much waste.

To solve this problem, the present applicant has previously filed Japanese Patent Application No. 55-166698. This dishwasher uses 1 water
By repeating the cycle of spraying for 10 minutes and then resting for 10 minutes six times (pre-washing operation), water is allowed to penetrate the dirt firmly attached to the tableware to make the dirt easy to remove, and the dirt is surely washed by the main wash after that So that even if the meal time of each family member is different,
These dishes can be washed all at once.

(Problems to be Solved by the Invention) However, in the dishwasher disclosed in Japanese Patent Application No. 55-166698, once the operation is started, the pre-washing operation is performed for a predetermined time set in advance, and then the main washing is performed. Because it is a transition, you have to wait for the last person to finish eating before you start driving.

In other words, in this dishwasher, the tableware of the person who completed the meal was left as it was, and after the person who ate later finished eating, the tableware of the person who completed the meal and ate later The human tableware is put together in the washing tank and the operation is performed. Then, by this pre-washing operation at the beginning of the operation, it is said that water is soaked into the dirt which is firmly adhered to the tableware of the person who has finished eating earlier and is easily dropped during the main washing operation. Things.

In other words, while it is known that starch and other dirt are dried and firmly adhere to the tableware, the tableware of the person who has finished eating is left as it is, which is irrational. is there.

The present invention has been made in view of the above circumstances, and its purpose is, for example, even if the meal time of a family member is different, it is possible to wash the meal at once, and of course, the stains on the tableware of a person who has finished eating first. It is an object of the present invention to provide a dishwasher capable of always keeping a wet state without drying.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, a dishwasher of the present invention comprises:
In a main washing operation in which water is sprayed on tableware stored in a washing tank to wash the tableware, the main washing operation is automatically shifted to after a long time, and the main washing operation is automatically performed for a long time. It is characterized in that a wetting process of injecting water into tableware every time is repeated.

(Operation) For example, when the meal time of the family is different, after the meal is completed, the tableware of the person is stored in the washing tank, and the main washing operation is performed after a long time. Then, a wet process of spraying water on the tableware is repeatedly performed at regular intervals during a long period of time up to the main washing operation, so that the dirt adhering to the tableware is wetted by the wet process and is not dried. Then, after the last person finishes the meal, the tableware of that person is stored in the washing tank. Then, after the elapse of the long time, the operation automatically shifts to the main washing operation to wash the dishes.

As described above, the main washing operation is performed after a long time, and the wet process of injecting water to the tableware at regular intervals during the long period of time is repeated. The intermittent wetting process performed until the time of washing the dishes of the person who has eaten at the time prevents the dirt from drying. In addition, about tableware of person who ate later,
It is not necessary to perform a useless wetting process, and it is possible to perform a main washing operation together with tableware of a person who has already eaten.

An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 4, reference numeral 1 denotes an outer box, in which a washing tank 3 opened and closed by a door 2 is provided. The bottom of the washing tank 3 is a water storage section 3a. Tap water is supplied to the water storage section 3a by a water supply valve 4, and the water in the water storage section 3a is drained by a drain pump. 5 is discharged outside the machine. Reference numeral 6 denotes a washing pump for sucking water in the water storage section 3a and spraying the water from the spray tower 7 and the spray arm 8 to the tableware stored in the dish basket 9.

Next, in FIG. 3 showing an electric configuration of the dishwasher, reference numeral 10 denotes a microcomputer as operation control means, which is provided with a water supply valve 4, a washing pump drive motor 12, and a drainage pump drive motor 13 via a driver 11. , The heater 14 and the fan drive motor 15 for drying by turning off and on
The main washing operation, the rinsing operation, and the drying operation are executed according to a preset program. The drying fan drive motor 15 drives a fan device (not shown) during the drying operation to supply the air heated by the heater 14 into the washing tank 3 to evaporate the moisture attached to the tableware. It is for so-called tableware drying. Reference numeral 16 denotes a door switch that operates when the door 2 is closed. When the door 2 is opened during operation, the operation is temporarily stopped when the door switch 16 is turned off, and the operation is resumed when the door switch 16 is turned on when the door 2 is closed. It has become so. Reference numeral 17 denotes a water level switch for detecting that water has been supplied to the predetermined water level in the water storage unit 3a, and stops the water supply operation of the water supply valve 4.
A thermistor 19 serving as a temperature detecting means for detecting the temperature inside and turning off the heater 14, and a display device 19 comprising an LED driven via a driver 20.

In the wet operation, as shown in FIG. 1, the "drain" step in which the drain pump drive motor 13 is energized for one minute and the water supply valve 4 is energized to supply tap water into the water storage section 3a. After performing the “water supply” step, the “wet” step and the cleaning pump drive motor for energizing the washing pump drive motor 12 for one minute
The "pause" process of turning off the power for 12 for 9 minutes is alternately repeated until the end of the wet operation. In addition, the main washing operation,
After executing the same “draining” step and “water supply” step as described above, the “washing” step of continuously energizing the washing pump drive motor 12 for 20 minutes is executed. The remaining first and second rinsing operations are "drainage", "water supply",
The steps of "water supply and drainage", "pause", "drainage", "water supply" and "rinse" are sequentially executed. In the drying operation, the steps of "drainage", "pause" and "drying" are sequentially executed. The water supply valve 4, the washing pump drive motor 12, the drainage pump drive motor 13, the heater
14 and the drying fan drive motor 15
It can be understood from the fact that the energization timing is indicated by oblique lines and the power cutoff period is indicated by blanks.

In FIG. 3, reference numeral 21 denotes a wet operation time setting switch for performing an operation for setting the execution time of the wet operation, 22 denotes a start switch for starting the operation, and 23 denotes a stop switch for stopping the operation. Each time the switch 21 for setting the wet operation time is pressed once, the microcomputer 10 changes the wet operation time for a predetermined long period, for example, 1 to 12 hours, at one-hour intervals. ing. Therefore, the microcomputer 10 also functions as a wet operation time setting unit. When the start switch 22 is pressed without the wet operation time setting switch 21 being pressed once (wet operation time “0”), the microcomputer 10 returns to FIG. The normal washing course shown in a) is executed, and the main washing operation, the first rinsing operation, the second rinsing operation and the drying operation are automatically advanced in order, and the wet operation time is 1 to 12 hours.
When the time is set to any of the time ranges, the wet additional course shown in FIG. 1B is executed, and the wet operation, the main washing operation, the first rinsing operation, the second rinsing operation, and the drying operation are performed. Are automatically advanced in order (however, the drainage process and the water supply process of the main washing operation are omitted). Then, when the start switch 22 is pressed during the wet operation, the wet operation is stopped as shown in FIG. 1 (c), and the remaining wet operation is omitted to proceed to the main washing operation. (In this case as well, the “draining” step and the “water supply” step in the main washing operation are omitted). Therefore, the start switch 22 also functions as stop operation means for stopping the wet operation halfway. The first
In FIGS. (A) to (c), the steps executed in each course are indicated by oblique lines.

Next, the operation of the above configuration will be described with reference to the time chart of FIG. 1 and the flowchart of FIG. The door 2 is opened, the tableware basket 9 is pulled out from the washing tank 3, the tableware is stored in the tableware basket 9, and is pushed into the washing tank 3. Then, the detergent is put into the water storage section 3a, and the door 2 is closed. Thereafter, when the start switch 22 is operated without operating the wet operation time setting switch 21, the normal washing course shown in FIG. 1A is selected (steps 1 and 2 in FIG. 2).
2), the main washing operation after step 3 in FIG. 2 is started. This main washing operation is performed from the “drain” step, and the drain pump drive motor 13 is energized. Therefore, if water remains in the water storage unit 3a, the water is discharged outside the machine by the drain pump 5. Is done. When this “drainage” process is completed, the water supply valve 4 is energized to supply water into the water storage unit 3a.
The water dissolves the previously introduced detergent and becomes a detergent solution. Then, when water is supplied to the predetermined water level in the water storage section 3a, the water level switch 17 is turned on, whereby the water supply valve 4 is cut off and the water supply is stopped, and the washing pump drive motor 12 is turned off.
Is energized. When the washing pump drive motor 12 is energized, the washing pump 6 is started, so that the pump 6 sucks the detergent liquid in the water storage portion 3a and discharges the detergent solution from the jet tower 7 and the jet arm 8 into the dishware in the dish basket 9. To wash the dishes. When such washing is continuously performed for 20 minutes, the main washing operation is completed (Step 8 in FIG. 2), and then the first rinsing operation is performed. In this rinsing operation, first, the same “draining” process as described above is performed, so that the detergent liquid used during the main washing operation is discharged outside the machine, and the subsequent “water supply”
In addition, the water storage section 3a is cleaned by the respective steps of “drainage”, and clean water is stored in the water storage section 3a by the next “water supply” step. Then, the water stored in the water storage unit 3a is injected into the tableware by the subsequent “rinse” process,
Soot After the end of the first rinsing operation, the second rinsing operation is performed in the same manner as the first rinsing operation,
Thereafter, the operation shifts to the drying operation. In this drying operation, first, water from the second rinsing operation is discharged outside the machine by a “drain” process, and then the heater 14 and the drying fan drive motor are driven.
A "drying" step is performed in which both the power supplies 15 are energized, whereby the dishes are dried, and a series of operations is completed as described above.

By the way, for example, the whole family cannot eat at once because of the delay in returning home from the father who went to work, and the meal may be repeated twice. In such a case, the tableware of the person who has finished the meal is put in the washing tank 3 in the same manner as described above, the detergent is put in the concave portion (not shown) of the door 2, and the door 2 is closed. Then, the switch 21 for setting the wet operation time is operated so that the main wash operation is performed after a desired long time, and the wet operation time setting switch 21 is operated in accordance with the time at which the meal of a person who comes home late will be finished. The execution time is set to a desired long time, and the start switch 22 is operated. Then, the wet additional course shown in FIG. 1 (b) is selected (steps 1 and 2 in FIG. 2), and the wet operation after step 9 in FIG. 2 is started. In this wet operation, first, the respective steps of “drainage” and “water supply” are executed in the same manner as described above, so that water in which the detergent is dissolved is stored in the water storage section 3a. When the "water supply" step is completed, both the "wet" and "pause" steps in which the washing pump drive motor 12 is energized for 1 minute and cut off for 9 minutes are repeatedly executed (wet operation). In such a wet operation, the detergent liquid is sprayed on the tableware in the "wet" process, so that the detergent liquid permeates the dirt attached to the tableware. Then, in the "pause" step, when the dirt on the tableware is in a state shortly before the state where the dirt is almost naturally dried, the "wet" step is performed again and the detergent liquid is sprayed on the tableware, so that the dirt is eventually dried. It can be prevented from firmly adhering to tableware.

By the way, when the person who has come home late finishes the meal, the door 2 is opened and the tableware of the person is stored in the tableware basket 9. in this case,
Even if the door 2 is opened during the "wetting" process, the "wetting" process is temporarily stopped by the OFF operation of the door switch 16, so that the cleaning liquid does not flow out. Then, the door 2 is closed (restarting the wet operation), and then the start switch 22 is operated. Then, as shown in FIG. 1C, the wet operation is stopped halfway (step 15 in FIG. 2), the remaining wet operation is omitted, and the "washing" step of the main washing operation (step in FIG. 2) Go directly to 7). Then, the "washing" step of continuously energizing the washing pump drive motor 12 and continuously injecting the washing liquid into the dishes as described above is performed for 20 minutes, and then the first washing is performed as described above. Then, the second rinsing operation and the drying operation are automatically performed in order, and a series of operations is completed as described above.

Also, when the tableware of a person who is late to return home is stored in the tableware basket 9 and the door 2 is closed, if the start switch 22 is not operated, the wet operation time setting switch is initially set.
When the wet operation time set by 21 elapses, the operation automatically shifts to the main washing operation at that time. Therefore, even if the start switch 22 is forgotten to be operated, it is possible to effectively prevent a situation in which the wet operation is performed forever and the operation does not shift to the main washing operation.

As described above, according to the present embodiment, the main washing operation is performed after a long period of time. Therefore, when the meal is repeated twice, the tableware of the person who has completed the meal and the meal are later eaten. It can be washed together with human tableware at once.
In this case, the washing liquid is soaked in the dirt by the spraying of the washing liquid in the intermittent “wetting” process performed during a long time before the main washing operation is performed. Since it is kept in a wet state, it is dried so that dirt is not firmly adhered to tableware. For this reason, the dirt always contains moisture and is kept in a state where it is easily washed off by continuous spraying of the detergent solution, so that after eating afterwards, tableware in an undried state where dirt is still easy to remove In the case of washing in a lump, it is possible to immediately perform the main washing. Even in this case, it is possible to satisfactorily remove dirt from all the dishes and clean the dishes.

In this embodiment, particularly, the wet operation is performed by intermittent injection of water containing detergent, so that the enzyme contained in the detergent sufficiently penetrates into the stain and effectively acts on the stain. Therefore, cleaning during the main cleaning operation can be performed more effectively.

Further, in this embodiment, since the wet operation time can be set to a desired long time, the execution time of the wet operation can be set in accordance with the time interval of two meals. Therefore, when it is time to wash the dishes of a person who has eaten later, a situation has occurred in which the wet operation of the dishes of the person who has already finished eating has been completed and shifted to the main washing operation. Can be prevented. Further, in this embodiment, since the wet operation time can be set to a maximum of 12 hours, for example, it is sufficiently possible to wash the dishes used for breakfast and the dishes used for lunch together.

In addition, the use form of the wet addition course is, as described above,
In the case of two meals, in addition to washing dishes all together, it may be used for washing dishes that have become dirty and dry, because the dishes have been left for a long time. For example, the wet operation time may be set to, for example, 1 hour, and the wet operation may be performed until the dry operation is completed without stopping the wet operation.

In the above-described embodiment, the cleaning liquid is sprayed even during the wet operation. However, the cleaning liquid is sprayed only when the cleaning operation is performed. It may be configured as follows. In the above embodiment, the set time of the long-time wet operation is set to a minimum of 1
Although it was time, this may be about 30 minutes.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and the execution time of the wet operation may be fixedly set to 12 hours, for example, within a range not departing from the gist thereof. Various modifications can be made.

[Effects of the Invention] As described above, according to the present invention, the main washing operation is automatically shifted to after a long time elapses, and the wet process of injecting water into the tableware at regular intervals during the long time elapses. By adopting a repetitive configuration, for example, even if the meal times of family members are different, the dishes can be washed together at once, and the dirt on the dishes of the person who has eaten first can be prevented from drying, and the dirt can always be removed. Can be maintained in a moist state containing water and easily washed off.

In addition, after a long period of time, since the operation automatically shifts to the main washing operation, it is possible to prevent the occurrence of a situation in which only the wetting process is repeatedly performed forever without washing the dishes, and has an excellent effect. .

[Brief description of the drawings]

1 is a time chart, FIG. 2 is a flowchart, FIG. 3 is a block diagram showing an outline of an electric configuration, and FIG. 4 is a schematic configuration of a dishwasher. FIG. In the figure, 3 is a washing tank, 4 is a water supply valve, 5 is a drain pump, 6 is a washing pump, 7 is an injection tower, 8 is an injection arm, 10 is a microcomputer, 12 is a washing pump drive motor, and 21 is a wet operation time. A setting switch 22 is a start switch.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-132535 (JP, A) JP-A-57-89838 (JP, A) Fully open 63-139526 (JP, U) Really open 101476 (JP, U)

Claims (1)

(57) [Claims] 1. A main washing operation in which water is sprayed on tableware stored in a cleaning tank to wash the tableware,
A dishwasher characterized by automatically shifting to the main washing operation after a long time, and repeating a wet process of injecting water to the tableware at regular intervals during the long time.