JP3063293B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher having a drainage pump for supplying washing water into a washing tank, washing dishes stored in the washing tank, and then draining the washing water out of the washing tank.

[0002]

2. Description of the Related Art The structure of a conventional dishwasher will be described with reference to FIG. That is, a cleaning tank 2 provided inside the main body 1 and a cleaning water discharge pump 3 for discharging cleaning water into the cleaning tank 2 for cleaning the dishes stored in the cleaning tank 2.
A drain pump 4 for draining the washing water in the washing tank 2 out of the machine, and a machine switch 5 for shutting off a power supply circuit of the machine.

Further, a recess 6 (a) for containing a detergent is provided in a part of an inner surface of a lid 6 which covers a front surface of the cleaning tank 2.

A heater 7 for heating the cleaning water in the cleaning tank 2 is provided on the bottom of the cleaning tank 2.

[0005] With the above configuration, when the operation is started, the drain pump 4 is first operated to drain the washing water remaining in the washing tank 2 to the outside of the machine, and then the washing process is started, and the washing step is started. After supplying water, the washing water discharge pump 3 and the heater 7
Is to drive.

At this time, the detergent contained in the recess 6 (a) on the inner surface of the lid 6 dissolves in the washing water, and together with the washing water, the washing bath 2
It is discharged inside.

[0007]

As can be understood from the above description, in the conventional structure, after the cleaning process is started, the cleaning process is started.
If the power supply to the machine is cut off halfway, the operation is started again, and when the drainage pump 4 is first operated, the washing water remaining in the washing tank 2 is drained out of the machine . For this reason,
And detergent was put before the source shut-off, there is a problem that would waste washing water heated by the heater 7.

After the cleaning process is started, the reason why the power supply to the machine is cut off is that the cleaning process requires a large current because the heater 7 for heating the cleaning water and the cleaning water discharge pump 3 are simultaneously operated. When the dishwasher and other electric appliances and the like are operated at the same time, the breaker of the house operates and the power supply to the dishwasher is shut off.

According to the present invention, even when the power to the dishwasher is cut off for the above-mentioned reasons during the operation of the washing process, the power is cut off.
The operation is intended to be restarted without wasting the previously introduced detergent and the washing water heated by the heater 7.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a washing tank for accommodating tableware, a washing water and a washing tank.
Cleaning nozzle that jets rinse water and cleaning water in the cleaning tank
Pump and heater for draining water and rinsing water out of the machine
And the aircraft switch that turns on and off the power circuit that drives the aircraft
Switch to detect the on / off state of the machine switch.
Power from the power supply without passing through the
And control means for controlling the operation of the aircraft.
First, the drainage pump is driven at the beginning of the operation, and then the cleaning process is performed.
When the operation is properly completed, the aircraft switch
When the power is cut off during operation
Indicates that the voltage is
The detecting means detects the on state of the body switch.
If detected, wash without first operating the drain pump.
It operates the purification process.

[0011]

According to the present invention, the on / off state of the machine switch at the time of turning on the power is detected, and if the machine switch is turned on at the time of turning on the power, the power to the dishwasher is reduced for the above-described reason. It is possible to determine that the connection has been interrupted.

That is, when the user terminates the operation of the dishwasher, the user turns off the body switch. In addition, in recent dishwashers, when the operation is properly terminated,
Since the machine switch is automatically turned off, the user does not need to operate the machine switch, and the machine switch is turned off when the operation is completed. In other words, the operation of the dishwasher
If it ends immediately, the aircraft switch is turned off.
ing. On the other hand, the power is shut off during operation such as during the cleaning process.
The aircraft (power failure, circuit breaker, etc.)
Operation stops with the switch turned on.

[0013] Therefore, if the state of the aircraft switched on when the power is turned on, it is determined that the power supply to the dishwasher in the middle of operation has been cut off, the operation of the normal series of dishwasher
A control means is provided for restarting the cleaning step without driving the first drain pump. As a result, the detergent supplied before the power is turned off and the cleaning water heated by the heater 7 are drained.
They will not be wasted and will not be wasted.

[0014]

An embodiment of the present invention will be described below with reference to the drawings. The basic structure of the dishwasher of the present invention is shown in FIG.
Therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 1, a control device 8 provided at the lower portion of the inner surface of the main body 1 is provided with a detecting means for detecting the on / off state of the machine switch 5, and controls the drain pump 4 based on this detection signal. A control unit for performing the control is provided in the control device 8. Reference numeral 9 denotes an AC power supply, and the control device 8 supplies power to the control unit 11 through a DC 5 V power supply 10 irrespective of the body switch 5. Normally, a microcomputer (hereinafter, referred to as a microcomputer) is used as the control unit 11, and when the power is supplied to the microcomputer, the microcomputer starts operating.

Next, the body switch 5 is turned on.
That if, aircraft switch turns on and off detection means 12 will enter Jo of
State , and this detection signal is input to the control means 11,
It can operate as a dishwasher. ON / OFF of the transistor 13 which is turned ON / OFF by the control means 11
Accordingly, the drain pump 4, the washing water discharge pump 3, heater 7
And a bidirectional thyristor 14 as a switching element.
Are used to turn ON and OFF.

The operation of the above configuration will be described with reference to the flowchart shown in FIG.

At the same time as turning on the power of the machine (step 1),
The control device 8 detects the on / off state of the machine switch 5 (step 2). The operation is started (steps 3 and 4), and the following operation is performed based on the detection signal of the ON / OFF state of the machine switch 5.

That is, when the body switch 5 is in the off state, it is determined that the previous operation has been properly completed.
As the next operation, the drain pump 4 is operated to drain the washing water in the washing tank 2 (step 5). That is, a normal series
The operation of the dishwasher is performed as it is. Thereafter, water is supplied into the washing tank 2 (step 6), and after supplying a specified amount of water, the washing water discharge pump 3 and the washing water heating heater 7 are operated (step 7).

When the body switch 5 is turned on,
The next operation is to restart the operation after turning off the power during operation.
It is determined that the cleaning tank 2
Water supply is started inside (step 6). At this time, if a prescribed amount of water is stored in the washing tank 2 in advance, there is no need to supply water, and the washing water discharge pump 3 and the washing water heating heater 7 are operated as the next operation.

That is, the ON / OFF state of the body switch 5
, The presence or absence of the first drainage operation is controlled. When the power is shut off during the operation, the detergent has already been put into the cleaning tank by the user before the restart of the operation , and has been dissolved in the cleaning water discharged from the cleaning water discharge pump 3. As described above, when the power of the dishwasher is cut off during the operation of the washing process and the operation is started again, the operation control starts to progress from the power-on. At this time, since the power supply is cut off and the operation is stopped, the body switch 5 is turned on.
Thus, the operation proceeds to the cleaning step without operating the drain pump 4 at the beginning of the cleaning step. Then, because it can be used again washing step without draining <br/> put the detergent and washing water before power-off, it become possible to eliminate the waste of detergent and washing water.

[0022]

As is apparent from the above embodiments, the present invention provides a washing tank containing tableware, washing water and rinsing water.
Cleaning nozzle that sprays water,
A drain pump for discharging seepage water, a heater, and
Aircraft switch to turn on and off the power circuit to be driven
Detecting means for detecting the on / off state of the body switch;
When power is supplied from the power supply without going through the body switch
Both are equipped with control means for controlling the operation of the aircraft,
First, the drainage pump is driven, and then the cleaning process is performed.
When the operation is properly completed, the body switch automatically turns off.
On purpose becomes Zhou incoming when the power supply during operation Application is blocked
In the state that remains in the state, when the voltage is applied, the detection
When the means detects the on-state of the aircraft switch
Operates the cleaning process without first driving the drainage pump
Since the dishwasher is turned off during the washing process, the detergent and washing water added before the shutoff can be used again in the washing process.
It is possible to eliminate waste of detergent and washing water,
It is also possible to save the trouble of re-feeding the detergent.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control unit of a dishwasher according to one embodiment of the present invention.

FIG. 2 is a flowchart showing an operation control method of the dishwasher according to one embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a conventional dishwasher.

[Explanation of symbols]

 4 Drain pump 5 Airframe switch 8 Control device

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Wataru Uchiyama 1006 Kazuma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 15/46 A47L 15/42

Claims (1)

(57) [Claims] 1. A washing tank containing tableware, washing water and
The cleaning nozzle that jets the rinse water and the cleaning water and water in the cleaning tank
Pump and heater for draining water and rinse water out of the machine
And the aircraft switch that turns on and off the power circuit that drives the aircraft
Switch to detect the on / off state of the machine switch.
Power from the power supply without passing through the
And control means for controlling the operation of the aircraft.
First, the drainage pump is driven at the beginning of the operation, and then the cleaning process is performed.
When the operation is properly completed, the aircraft switch
When the power is cut off during operation
Indicates that the voltage is
The detecting means detects the on state of the body switch.
If detected, wash without first operating the drain pump.
A dishwasher that drives the cleaning process .