KR20030092203A - Dish Washer's Operating Method - Google Patents

Abstract

PURPOSE: An operation method of a dishwasher is provided to reduce the consumption of water and electricity by varying the speed of a pump motor according to the pollution level of the water. CONSTITUTION: An operation method of a dishwasher comprises the steps of: detecting the pollution level of water(S3); setting the speed of a pump motor to pump the water according to the detected pollution level of the water(S4); and injecting the water according to the speed of the pump motor(S7).

Description

Dish Washer's Operating Method

The present invention relates to an operation method of a dishwasher, and in particular, while washing dishes in a dishwasher, by detecting the contamination of the dish to adjust the spraying pressure of the washing water to spray the washing water corresponding to the pollution degree while improving the washing ability The present invention relates to a method of operating a dishwasher to prevent unnecessary energy consumption.

Referring to the structure of the dishwasher described above with reference to the structure of the general dishwasher shown in Figure 1 as follows.

That is, when the water supplied to the washing tank 10 is sucked by the pump motor 20 and supplied to the washing nozzle 40 through the connecting pipe 30, the washing nozzle 40 is a spray hole formed to spray the washing water. Spraying to the dish 60 on the washing basket 61 provided in the washing tank 10 through 50 to remove the contamination on the surface of the dish.

After washing the dishes, the dirt and washing water separated from the dishes flow to the bottom of the washing tank 10 and are stored in the washing tank 70. At this time, the contaminated washing water collected in the washing tank is purified through the filter 80 and sucked into the pump motor 20 to be re-supplied as the washing water, and finally the washing is completed. The stored washing water is discharged to the outside through the drain hose 90 together with the dirt.

2 is a flowchart illustrating an operation method according to the related art of the dish washing machine having such a configuration.

The first stage of supplying water (L1) to the washing tank, the second stage of driving the fixed speed of the pump motor at the initial set speed (L2), and performing the washing while maintaining the speed of the pump motor of the second stage (L3) And a fourth step of performing rinsing (L4), and a fifth step of performing drying (L5).

However, the operation method of the conventional dishwasher as described above is driven at a fixed speed set in the initial pump motor 20 regardless of the degree of contamination of the dish as the washing process proceeds to maintain a constant rotation speed of the pump motor Washing water is pumped with a constant force so that the washing water is injected at a constant injection pressure through the injection port (50).

Therefore, when the speed of the motor is higher than the pollution of the dishes, washing water and electric energy are consumed unnecessarily, and the efficiency of washing is reduced. Also, when the setting speed is lower than the pollution of the dishes, the washing power is not completely removed because the contamination of the dishes is not completely removed. There is concern.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to change the speed of the pump motor to adjust the injection pressure for washing the dish according to the degree of contamination of the dishwashing water and electricity It is to provide a method of operating a dish washer that prevents the consumption of energy and at the same time ensures a proper cleaning power to the contamination of the dishes.

1 is a view showing a configuration of a dishwasher,

2 is a flow chart showing an operation method of the conventional dish washing,

3 is a flowchart illustrating a method of operating a dish washer according to the present invention;

4 is a view showing the waveform of the power input to the pump motor during the operation of the dishwasher according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: washing tank 20: pump motor

40: washing nozzle 50: nozzle

60: tableware 70: washing tank

80: filter

According to the operating method of the dishwasher according to the present invention for solving the above problems, the first step of detecting the contamination level of the washing water, the second step of changing the speed of the pump motor for pumping the washing water according to the detected pollution degree and Including the third step, the washing water is sprayed according to the speed of the pump motor adjusted in the second step.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart illustrating a method of operating a dishwasher according to the present invention, and FIG. 4 is a view illustrating waveforms of power input to a pump motor during operation of the dishwasher.

The washing operation for removing the contamination of the dishes stored in the washing tank is performed (S1).

While the washing operation is performed for a predetermined time, when a predetermined time elapses in the dishwasher (S2), the degree of contamination of the wash water stored in the washing tank of the dishwasher is sensed (S3).

The pollution degree may be detected through a sensor device such as an optical sensor as a pollution degree of the washing water after performing the washing operation (S1). Therefore, the dishwasher of the present invention detects the degree of contamination of the washing water and predicts the degree of contamination of the entire dish.

In operation S4, the detected pollution level and the information on the pollution level previously input to the dishwasher are compared. The pollution level is a standard value for comparing the severity of pollution degree, and is a standardized value divided into levels of I for heavy pollution, II for medium and III for low pollution. These standardized contamination levels are entered into the dishwasher so that the pollution levels I, II and III are compared in order with the detected pollution levels.

According to the comparison result, the phase of the power applied to the pump motor is controlled (S5), and the driving speed of the motor is divided into three modes by the controlled phase (S6).

The speed of the motor has a variety of speed modes according to the pollution degree, the speed mode is a high speed mode suitable for the pollution level of I level, the medium speed mode decelerated by a set value than the high speed mode to suit the pollution level of II level, III It is composed of low speed mode which is decelerated by setting value than medium speed mode to suit the level of pollution.

If the detected pollution level is pollution level I, the motor is phase controlled to enter high speed mode. If the pollution level is less than pollution level I, it is compared with pollution level II. If the pollution level is II, the motor can enter medium speed mode. When the phase of the motor is controlled, and the pollution level II or less, it is regarded as the pollution level of the pollution level III, and the phase of the motor is controlled to enter the low speed mode.

According to the three speed modes of the regulated motor, the force that the pump motor pumps the washing water is changed, and the injection pressure of the washing water is also changed. Therefore, the washing water is sprayed (S7) at an appropriate spray pressure corresponding to the degree of contamination of the tableware can be efficiently performed washing.

After the process is performed, the dishwasher performs the remaining steps of rinsing and drying.

The phases of the motor controlled for entering the high speed mode, the medium speed mode, and the low speed mode of the motor are shown in FIGS. 4A, 4B, and 4C.

In order to control the phase of the motor, the phase of power supplied to the pump motor is controlled by a trigger signal output from the controller of the dishwasher. That is, referring to the graph of FIG. The waveform is output from the input power, the solid bar signal is the trigger signal, and the hatched portion is the power supplied to the pump motor.

As shown, the portion of the power input to the motor is from the trigger signal position to the next zero crossing point. Therefore, the amount of power input to the pump motor is determined by controlling the phase of the trigger signal to adjust the position of the first trigger signal.

Figure 4a is a case where all of the input power is applied to the pump motor in order to spray the high pressure washing water, Figure 4b is a case of spraying the washing water medium pressure, Figure 4c is a case of spraying the washing water low pressure only part of the power to the pump motor The motor speed is reduced.

Therefore, in the present invention, when the degree of contamination of the washing water is high, the contamination of the dishware is determined to be severe, and the rotation speed of the pump motor is adjusted at high speed to increase the injection pressure by pumping the washing water at high pressure, and when the degree of contamination is low, the contamination is not very good. By lowering the spray pressure of the washing water, it is determined that the cleaning water is reduced, thereby reducing the amount of washing water and electric energy for driving the motor, and shortening the washing time.

Operating method of the dishwasher of the present invention configured as described above by detecting the pollution degree of the washing water for washing the dishes by adjusting the spraying pressure of the spray by controlling the speed of the motor driven through the phase control of the washing motor according to the pollution degree It also increases energy efficiency by preventing unnecessary waste of washing water during washing and preventing unnecessary motor operation. In addition, when washing the utensils weak to impact, the injection pressure of the washing water is controlled to protect the surface of the utensils being washed, thereby improving the durability of the utensils.

Claims (5)

A first step of detecting a degree of contamination of the washing water; A second step of determining an appropriate speed of the pump motor for pumping the washing water according to the detected pollution degree; And a third step of spraying the washing water according to the speed of the pump motor determined in the second step. The method of claim 1, Contamination degree of the washing water in the first step is the operation method of the dishwasher, characterized in that detected after a predetermined time elapsed. The method of claim 1, In the second step, the detected pollution level is compared with the information on the pollution level previously input to the dishwasher to have different pump motor proper speeds, and the phase of the power applied to the pump motor is controlled according to the comparison result. Operation method of the dishwasher, characterized in that further comprising the process. The method of claim 3, wherein Method of operation of the dishwasher, characterized in that the speed of the pump motor is changed as the phase of the power applied to the pump motor is controlled. The method of claim 4, wherein Method of operation of the dish washer characterized in that the injection pressure of the washing water is changed as the speed of the pump motor is changed.