JPH0591965A - dishwasher - Google Patents

Abstract

(57) [Summary] [Purpose] To restart the operation without wasting the detergent and the washing water heated by the heater that was previously put in even when the power to the dishwasher was shut off during the washing process. With the goal. [Structure] The control device 8 is provided with a detection means 12 for detecting the on / off state of the machine body switch 5, and based on this detection signal, a control means 11 for controlling the drainage pump 4 is provided in the control device 8 for restarting operation. At the start, when the machine body switch 5 is turned on, the first drainage operation is stopped and the cleaning process operation is performed.

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 to wash 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, the cleaning water discharge pump 3 for discharging the cleaning water into the cleaning tank 2 for cleaning the cleaning tank 2 provided inside the main body 1 and the dishes stored in the cleaning tank 2.
A drain pump 4 for draining the cleaning water in the cleaning tank 2 to the outside of the machine and a machine switch 5 for cutting off the power circuit of the machine are provided.

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

With the above configuration, when the operation is started, the drainage pump 4 is first operated to drain the cleaning water remaining in the cleaning tank 2 to the outside of the machine, and then the cleaning process is started to enter the cleaning tank. Water is supplied to the cleaning water discharge pump 3 and the heater 7.
Is to drive.

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

[0007]

As can be seen from the above description, in the conventional configuration, after the washing process is started, when the power supply to the machine is cut off, the operation is restarted and the drainage pump 4 is firstly operated. When the washing machine is operated, the washing water remaining in the washing tank 2 is discharged to the outside of the machine.
There is a problem in that the wash water heated by is required to be wasted.

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

According to the present invention, even when the power to the dishwasher is cut off due to the above-mentioned reasons during the washing process operation, the detergent introduced previously and the washing water heated by the heater 7 are not wasted. The purpose is to restart.

[0010]

In order to achieve the above object, the present invention provides a drainage pump for draining cleaning water in a cleaning tank to the outside of the machine, a machine switch for cutting off the power supply circuit of the machine, and the machine switch. And a control means for controlling the operation of the drainage pump based on a detection signal of the on / off state of the machine switch when the power is turned on.

[0011]

According to the present invention, with the above structure, the on / off state of the machine switch when the power is turned on is detected, and if the machine switch is on when the power is turned on, the power to the dishwasher is supplied for the reasons described above. It is possible to determine that the power has been cut off.

That is, when the user finishes the operation of the dishwasher, the machine switch is turned off, and in the recent dishwasher, when the operation is finished properly,
Since the airframe switch is automatically turned off, the user does not need to operate the airframe switch, and the airframe switch is turned off when the power is turned on.

If the machine switch is turned on when the power is turned on, it is determined that the power to the dishwasher has been cut off for the above-mentioned reason, and control means is provided for restarting the washing process without operating the drainage pump. As a result, the previously introduced detergent and the cleaning water heated by the heater 7 are not wasted.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The basic configuration of the dishwasher of the present invention is shown in FIG.
Therefore, the same parts are denoted by the same reference numerals and the 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 detection means for detecting the on / off state of the body switch 5, and the drain pump 4 is controlled based on this detection signal. A control unit for performing the operation is provided in the control device 8. Further, 9 is an AC power supply, and the control device 8 does not relate to the machine switch 5 and energizes the control means 11 through the DC 5V power supply 10. A microcomputer (hereinafter, referred to as a microcomputer) is normally used as the control means 11, and the microcomputer starts its operation when the power is supplied.
When the machine body switch 5 is turned on, the machine body switch on / off detection means 12 detects this, inputs this detection signal to the control means 11, and becomes operable as a dishwasher. The control means 11 turns on / off the transistor 13, which turns on / off, to turn on / off the drainage pump 4, the wash water discharge pump 3, the heater 7, and the bidirectional thyristor 14 as a switching element. ..

The operation of the above configuration will be described with reference to the flowchart shown in FIG. Power on the aircraft (step 1)
At the same time, the control device 8 detects the on / off state of the body 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 body switch 5.

That is, when the machine body switch 5 is in the off state, the next operation is to operate the drainage pump 4 to drain the cleaning water in the cleaning tank 2 (step 5). After that, water is supplied into the cleaning tank 2 (step 6), and after supplying a prescribed amount of water, the cleaning water discharge pump 3 and the cleaning water heater 7 are operated (step 7).

When the body switch 5 is turned on,
As the next operation, water supply is started into the cleaning tank 2 without operating the drainage pump 4 (step 6). At this time, if a prescribed amount of water is stored in advance in the cleaning tank 2, it is not necessary to supply water, and the cleaning water discharge pump 3 and the cleaning water heating heater 7 are operated as the next operation.

That is, the presence / absence of the first drainage operation is controlled by the on / off state of the machine switch 5.

At this time, the detergent has been put into the washing tank by the user before the operation is started, and the washing water discharge pump 3
Dissolved in the cleaning water discharged. When the power of the dishwasher is cut off during the washing process operation and the operation is restarted, the operation control starts from the power-on. At this time, since the power supply is cut off and the operation is stopped, it is determined that the machine switch 5 is in the ON state, and the drainage pump 4 is not operated and the cleaning process is started. By being able to use the detergent and cleaning water that were previously supplied in the cleaning process again, it is possible to eliminate waste of the cleaning agent and cleaning water.

[0021]

As is clear from the above embodiments, the present invention is a drainage pump for draining the cleaning water in the cleaning tank to the outside of the machine,
A machine switch that shuts off the power supply circuit of the machine and a detection means for detecting the on / off state of this machine switch are provided. Since the control means for controlling is provided, even if the power of the dishwasher is shut off during the washing process operation, the detergent and the washing water previously supplied can be used again for the washing process. It is possible to eliminate waste, and it is also possible to save the trouble of adding the detergent again.

[Brief description of drawings]

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

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

FIG. 3 is a vertical cross-sectional view of a conventional dishwasher

[Explanation of symbols]

 4 Drain pump 5 Airframe switch 8 Control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Wataru Uchiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A washing tank for storing dishes, a drainage pump for draining the washing water in the washing tank to the outside of the machine, a machine switch for cutting off the power supply circuit of the machine, and a detection of the on / off state of the machine switch. A dishwasher provided with a detection means and a control means for controlling the operation of the drainage pump based on a detection signal indicating whether the machine body switch is turned on or off when the power is turned on.