JPH07289492A - Tableware washing machine - Google Patents

Abstract

PURPOSE:To certainly discharge the refuse in a washing water tank. CONSTITUTION:After a predetermined time is elapsed from a point of time when washing operation is completed by a timer, the drain valve 12 provided to the drain passage 11 of a washing water tank 5 is opened to deposit the refuse contained in washing water on the bottom surface 5a of the washing water tank 5 before the start of drainage. After the refuse is deposited, a part of washing water is drained to discharge the refuse to the outside of the washing water tank 5 along with washing water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly to a dishwasher for collecting rinse water used for a rinsing operation in a wash water tank.

[0002]

2. Description of the Related Art A conventional dishwasher is provided with a wash water tank for storing wash water, such as that disclosed in Japanese Utility Model Publication No. 59-31370. There is one in which after washing water is sucked up, it is sprayed into a washing chamber to wash dishes and the like in the washing chamber. The cleaning water is returned from the cleaning chamber to the cleaning water tank after cleaning, and the dishes are cleaned by circulating the cleaning water in this manner.

On the other hand, in such a dishwasher, when the washing operation is completed, the rinse water is sucked up from the rinse water tank by the rinse pump and then sprayed toward the dish to rinse the dish. By the way, since the rinsing water used for this rinsing operation is relatively clean water, recently, after rinsing, the rinsing water should be collected in the rinsing water tank instead of being drained to the outside of the main body. I try to reduce.

However, when the rinse water is collected in the wash water tank as described above, if the rinse water is allowed to flow into the wash water tank as it is, the wash water tank overflows. Therefore, conventionally, a drain valve was provided in the drain passage formed on the bottom surface of the wash water tank, and after the cleaning operation was completed, the drain valve was opened for a certain period of time so that part of the dirty wash water accumulated in the wash water tank I try to drain it. By providing the drainage passage on the bottom surface of the wash water tank in this way, it is possible to simultaneously discharge the food residue and the like in the wash water accumulated on the bottom surface as the wash water is drained.

[0005]

However, in such a conventional dishwasher, the drain valve is opened immediately after the washing operation is completed. Thus, the drain valve is opened immediately after the washing operation is completed. If the water is opened, the drainage ends after a certain period of time elapses before the debris in the wash water accumulates, so the debris remains in the wash water tank and the inside of the wash water tank becomes dirty. There was a problem that it would end up.

Therefore, the present invention has been made in order to solve such a problem, and an object of the present invention is to provide a dishwasher capable of reliably discharging the dust and the like in the wash water tank. It is a thing.

[0007]

SUMMARY OF THE INVENTION According to the present invention, while washing water is circulated from a washing water tank into a washing chamber to wash dishes and the like, the washing operation is completed and the washing water in the washing water tank is finished. After rinsing after draining a part,
In the dishwasher configured to collect the rinse water used for this rinse operation in the wash water tank, a drain valve provided in a drain passage formed in the bottom surface of the wash water tank and the drain valve are provided. After the cleaning operation is completed, the drainage valve control means is configured to be opened after a predetermined time has elapsed.

[0008]

[Function] By allowing the drain valve control means to open the drain valve provided in the drain passage of the wash water tank after a lapse of a predetermined time after the cleaning operation is completed, the drain water is controlled before the drain starts. Make sure that the contained debris is deposited on the bottom of the wash water tank. Then, after depositing the dust and the like, a part of the wash water is drained to discharge the dust and the like to the outside of the wash water tank together with the wash water.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a dishwasher according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a dishwasher main body (hereinafter referred to as a main body), and a washing chamber 2 in which an opening (not shown) for storing and taking out dishes and the like is formed is provided on an upper portion of the main body 1. . Then, cleaning nozzles 3a and 3b and rinsing nozzles 4a and 4b are provided at the top and bottom of the cleaning chamber 2, respectively.

On the other hand, a wash water tank 5 is arranged at the bottom of the main body 1, and wash water (not shown) stored in the wash water tank 5 is sucked up by a wash pump 6 at the time of washing. After being sprayed, it passes through the connecting pipe 7 and the cleaning pipe 8 and is ejected from the cleaning nozzles 3a and 3b toward the dishes and the like in the cleaning chamber 2. The cleaning water that has been cleaned is collected into the cleaning water tank 5 through a recovery hole (not shown) formed on the upper surface of the cleaning water tank 5 and is circulated and ejected.

A rinsing water tank (not shown) is disposed below the main body 1 or outside the main body 1, and the rinsing water stored in the rinsing water tank is stored after the cleaning operation is completed. After being sucked up by a rinsing pump 14 shown in FIG. 2, which will be described later, the rinsing nozzles 4a and 4b eject the rinsing nozzles 4a and 4b toward dishes and the like.

The rinsing water used for the rinsing operation is collected in the washing water tank 5 through the collecting hole. When the washing operation and the rinsing operation of the dishes and the like are completed in this manner, the door 9 that closes the opening for storing and taking out the dishes and the like is opened by the handle 9 to take out the dishes and the like.

On the other hand, in FIG. 1, reference numeral 11 denotes a drainage passage formed on the bottom surface 5a of the wash water tank 5 and communicating with the outside. The drainage passage 11 is opened after the washing operation is completed to pass the wash water. A solenoid valve 12, which is a drain valve for draining the water to the outside of the main body 1, is provided. The bottom surface 5a of the cleaning water tank 5 is inclined toward the drainage passage 11 so that the dust and the like in the accumulated cleaning water can easily flow toward the drainage passage 11.

By the way, the main body 1 is provided with a control circuit for controlling the dishwashing operation as shown in FIG. 2, and in this control circuit, numeral 13 sequentially drives the washing pump 6 and the rinsing pump 14. On the other hand, it is a timer that is a drain valve control means that opens the solenoid valve 12 after a predetermined time has elapsed after the cleaning operation is completed.

In the timer 13, tableware and the like are stored in the washing room 2 and the door 10 is closed, whereby the door switch SW1 is turned on, and thereafter the power switch SW is turned on.
When 2 is pressed, the first switch S
When 1 is turned on, the cleaning pump 6 is driven for a time (hereinafter referred to as a cleaning time) T1 according to the amount of dishes or the like.

When the cleaning time T1 elapses, that is, when the cleaning operation is completed, the first switch S1 is turned off and the second switch S2 is turned on, and the dirty cleaning water accumulated in the cleaning water tank 5 is then removed. The electromagnetic valve 12 is opened for a time T2 (hereinafter referred to as drainage time) required to drain a part of the water.

The second switch S2 and the solenoid valve 12
A delay relay R is provided between the solenoid valve 1 and the solenoid valve 12. After the predetermined time T3 has elapsed after the second switch S2 was turned on by the delay relay R, the solenoid valve 12 is energized to
Two are supposed to be opened. Therefore, the time for turning on the second switch S2 is the drain time T2 and the predetermined time T3.
It becomes the time which added and.

After the cleaning operation is completed, the electromagnetic valve 12 is opened after a lapse of a predetermined time T3, so that the dust contained in the cleaning water is deposited on the bottom surface 5a of the cleaning water tank 5. After that, drainage can be started, and dust and the like can be surely discharged along with the drainage of this wash water.

Further, when the predetermined time T3 and the drainage time T2 elapse in this way, the timer 13 turns off the second switch S2 and turns on the third switch S3, so that the rinsing pump 14 can be operated for a time corresponding to the amount of dishes or the like. Only the T4 (hereinafter referred to as rinse time) is driven. Then, during this rinsing operation, the rinsing water used for the rinsing operation is collected in the cleaning water tank 5 in which a part of the cleaning water has been drained.

Next, the operation of washing and rinsing dishes and the like in the dishwasher thus constructed will be described.

When the table 10 is stored in the washing room 2 and the door 10 is closed and the door switch SW1 is turned on and then the power switch SW2 is pressed, the timer 13 first turns on the first switch S1 to wash the dishes. Pump 6 cleaning time T
Only one is driven. Then, when the cleaning pump 6 is driven in this way, the cleaning water is sucked up from the cleaning water tank 5, passes through the connecting pipe 7 and the cleaning pipe 8 and is ejected from the cleaning nozzles 3a and 3b into the cleaning chamber 2. The dishes are washed.

When the cleaning time T1 has elapsed, the timer 13 then turns off the first switch S2 and the second switch S2 is turned off.
The switch S2 is turned on. Then, the second switch S2
Is turned on, the second switch S2 is activated by the delay relay R.
After a predetermined time T3 elapses after is turned on, the solenoid valve 12 is energized and the solenoid valve 12 is opened. Then, the dust or the like contained in the wash water is accumulated on the bottom surface 5a of the wash water tank 5 before the predetermined time T3 elapses, and the predetermined time T
Dust and the like accumulated on the bottom surface 5a are discharged to the outside of the main body 1 along with the drainage performed after 3 has passed.

After the elapse of the predetermined time T3 and the drainage time T2, the timer 13 turns off the second switch S2 and turns on the third switch S3, whereby the rinsing pump 14 is driven for the rinsing time T4. Then, when the rinsing pump 14 is driven in this way, the rinsing water is sucked up from the rinsing water tank, and the rinsing nozzles 4a and 4b are used.
Is sprayed into the washing room 2 to rinse dishes and the like. The rinse water used for this rinsing operation is collected in the wash water tank 5.

In this way, after the cleaning operation is completed by the timer 13, the electromagnetic valve 12 of the cleaning water tank 5 is opened after the lapse of a predetermined time T3, so that the residue contained in the cleaning water is cleaned. After depositing on the bottom surface 5a of 5, part of the wash water can be drained. As a result, dust and the like contained in the wash water can be reliably discharged to the outside of the main body 1.

In the above description, the case where the delay relay R is used to open the solenoid valve 12 after the elapse of the predetermined time T3 has been described, but the present invention is not limited to this, and an IC or the like is used. You may use it.

[0027]

As described above, according to the present invention, after the cleaning operation is completed, the drain valve is opened after a lapse of a predetermined time so that the debris contained in the cleaning water is accumulated on the bottom surface of the cleaning water tank. After that, since drainage can be started, it is possible to reliably discharge dust and the like in the wash water tank.

[Brief description of drawings]

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

FIG. 2 is a circuit diagram of a control circuit that controls a washing and rinsing operation of the dishwasher.

FIG. 3 is a diagram showing a relationship between ON / OFF of each switch, which is performed by a timer of the control circuit, and driving or opening / closing of a cleaning pump electromagnetic valve or the like.

[Explanation of symbols]

 1 Dishwasher main body 2 Wash room 5 Wash water tank 6 Wash pump 11 Drain passage 12 Solenoid valve 13 Timer 14 Rinse pump R Delay relay

Claims (1)

[Claims] 1. A rinsing operation is performed after washing water is circulated and spouted from a washing water tank into a washing chamber to wash dishes and the like, and at the same time the washing operation is completed and a portion of the washing water in the washing water tank is drained. In addition to the above, in the dishwasher configured to collect the rinse water used for this rinse operation in the wash water tank, a drain valve provided in a drain passage formed in the bottom surface of the wash water tank, A dishwasher comprising: a drainage valve control unit configured to open the drainage valve after a predetermined time has elapsed after the cleaning operation is completed.