KR20080050842A - Method for controlling washing of a dish washing machine - Google Patents

Abstract

A washing control method of a dishwasher is provided to achieve effective washing performance of dishes by measuring turbidity of rinsing water, determining the frequency of washing cycle and adjusting temperature for the rinsing water based on the frequency. A washing control method of a dishwasher comprises the steps of: measuring turbidity of rinsing water while a cycle for washing dishes using the rinsing water is in progress(S206); determining the frequency of the washing cycle based on the measured turbidity of rinsing water, according to a difference between the measured turbidity of rinsing water with a reference value if the measured turbidity of rinsing water is greater than the reference value(S208,S210); and adjusting temperature of the rinsing water according to the determined frequency of washing cycle.

Description

Method for controlling washing of a dish washing machine

1 is a side cross-sectional view showing the configuration of a dish washer according to the present invention,

2 is a control block diagram of a dish washer according to one embodiment of the present invention;

3A and 3B are an operation flowchart of a washing control method of the dish washing machine according to the present invention.

* Description of symbols on the main parts of the drawings *

20: washing tank 26a, 26b, 26c: spray nozzle

42: sump 44: turbidity sensor

46: washing pump 48: drainage pump

100: input unit 110: control unit

The present invention relates to a washing control method of the dishwasher, and more particularly, to a washing control method of the dishwasher for adjusting the washing water temperature of washing and rinsing according to the number of times of pre-washing according to the wash water turbidity.

In general, the dishwasher is a device for washing food residues (hereinafter, referred to as contaminants) on the tableware by using cold or hot water wash water, a main body having a washing tank, and a dish basket provided inside the washing tank. And a spray nozzle for spraying the washing water into the dish basket and a sump pumping the washing water with the spray nozzle connected to the spray nozzle.

When the dishwasher is placed in the dish basket to wash the dishware (washing vessel) to be washed, the washing water flows in the sump and the washing pump operates to move the washing water to the spray nozzle to spray the washing water to the dish at high pressure. Wash the dishes through. This washing administration is to perform a pre-cleaning a predetermined number of times (usually, twice) prior to performing the main cleaning to remove the contamination on the dishes in advance.

By the way, even if the contamination is not severe, the dishwasher performs the preliminary number of washings in a predetermined number of times even though only one preliminary washing can remove the contaminants. Therefore, a large amount of water is consumed and a large amount of energy is required. On the contrary, when the pollution is severe, there is a problem that the washing cannot be sure by only a predetermined number of pre-washes.

Accordingly, the present invention is to solve the conventional problems as described above, the object of the present invention is to detect the turbidity of the washing water during the pre-cleaning to determine the number of times of the pre-washing while reducing the number of unnecessary washing while washing water It is to provide a washing control method of the dishwasher to prevent waste of.

Another object of the present invention is to provide a washing control method of a dish washer that can ensure the washing in the case of serious contamination by adjusting the washing water temperature of washing and rinsing according to the number of times of pre-washing according to the wash water turbidity.

In order to achieve the above object, the present invention detects the turbidity of the wash water during the washing process using the wash water, determines the number of washes based on the detected turbidity of the wash water, and adjusts the temperature of the wash water according to the determined number of washes. It is characterized by.

In addition, detecting the turbidity of the washing water, characterized in that for detecting the turbidity of the washing water in the pre-cleaning stroke during the stroke of the dishwasher.

The determining of the number of washing cycles may include: comparing the detected turbidity of the washing water with a predetermined reference turbidity, and when the washing water turbidity is greater than or equal to the reference turbidity, the number of times of preliminary washing administration is performed according to the difference between the wash water turbidity and the reference turbidity. It is characterized by determining.

In addition, the present invention is characterized in that the number of times of preliminary washing administration increases as the difference between the wash water turbidity and the reference turbidity increases.

In addition, adjusting the temperature of the washing water is to adjust the washing water temperature of the washing or rinsing according to the determined number of times of the preliminary washing stroke, characterized in that to control the washing water temperature higher as the number of times of the preliminary washing stroke increases. do.

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

1 is a side cross-sectional view showing the configuration of a dish washer according to the present invention.

In Figure 1, the dishwasher of the present invention is formed of a main body 10 having a washing space therein, and a door 12 for opening and closing the front of the main body 10 to form its appearance.

The main body 10 is provided with a washing tank 20 for washing, and the washing tank 20 supports a plurality of dish baskets 22 for storing dishes and a plurality of dish baskets 22 to be slidably movable. Upper and lower injection nozzles 26a, interruption injection nozzles 26b, and lower injection nozzles 26c are provided at upper and lower portions of the rack 24 and the plurality of dish baskets 22 to spray washing water.

Here, the upper injection nozzle 26a and the interruption injection nozzle 26b are connected to the sump 42 which will be described later by the first supply pipe 28a, and the lower injection nozzle 26c is sump by the second supply pipe 28b. In connection with (42), the washing water is supplied.

And, the bottom surface of the washing tank 20 is provided with a heater 30 for heating the washing water, the heater 30 is accommodated in the heater installation groove 32 in which the washing tank 20 is formed on the bottom surface.

In addition, the lower portion of the washing tank 20 is provided with a machine room 40, the inside of the machine room 40 is introduced into the washing tank 20 and pumped by pumping the washing water to the upper, middle and lower injection nozzles 26a, A sump 42 for moving to 26b and 26c is provided, and inside the sump 42, a turbidity sensor 44 for detecting the turbidity of the dish-washed water during the washing stroke, that is, the degree of contamination of the wash water, is provided.

The turbidity sensor 44 detects the turbidity of the wash water by using a photo coupler for detecting the light signal received by the light receiving unit 44b by passing the light emitted from the light emitting unit 44a through the dish-washed wash water.

In addition, the sump 42 is provided with various flow paths and a washing pump 46 for pumping water into these flow paths, and on one side of the sump 42, a drain pump 48 and a drain pipe for discharging contaminated washing water to the outside. 50) is provided.

FIG. 2 is a control block diagram of the dish washing machine according to one embodiment of the present invention, and includes an input unit 100, a control unit 110, a driving unit 120, and a display unit 130 in addition to the apparatus illustrated in FIG. 1. .

The input unit 100 inputs operation information such as a washing course, washing water temperature, and rinsing addition to the control unit 110 according to a user's command.

The control unit 110 is a microcomputer that controls the dishwasher according to the operation information input from the input unit 100, and the washing water turbidity Tw detected by detecting the turbidity Tw of the washing water washed in the preliminary washing stroke in advance. If it is less than the reference turbidity (Ts), pre-cleaning is terminated once, and if the detected wash water turbidity (Tw) is greater than or equal to the reference turbidity (Ts), according to the difference between the detected wash water turbidity (Tw) and the reference turbidity (Ts). Determine the number of preliminary washes (approx. 2-3 times).

In addition, the controller 110 adjusts the washing water temperature in the subsequent main washing or rinsing stroke according to the determined number of times of preliminary washing.

① For 1 time of pre-cleaning (contamination degree approx.): The wash water temperature of this wash is 55 ℃, and the wash water temperature of rinse is 60 ℃

② In case of two preliminary washes (during pollution): The wash water temperature of this wash is 60 ℃, and the wash water temperature of rinse is 65 ℃

③ In case of 3 times of preliminary washing (contamination degree steel): The temperature of the washing water in this wash is 65 ℃, and the temperature of the washing water in rinsing is 70 ℃

As described above, the controller 110 controls the washing water temperature of the main washing and the rinsing according to the number of times of preliminary washing while varying the number of times of preliminary washing according to the degree of contamination of the dishes, thereby ensuring the washing regardless of the type or degree of contamination. You can do it.

The driving unit 120 drives the heater 30, the washing pump 46, the drainage pump 48, the water supply valve 122, and the like according to the driving control signal of the control unit 110. The water supply valve 122 controls the water supply of the washing water supplied into the washing tank (20).

The display unit 130 displays an operation state and an error of the dishwasher according to the display control signal of the controller 110.

Hereinafter, an operation process and an effect of the washing control method of the dish washing machine configured as described above will be described.

3A and 3B are flowcharts illustrating operations of a washing control method of the dish washing machine according to the present invention.

When the user selects desired driving information in a state where the dishes to be washed are stored in the dish basket 22 inside the washing tub 20, the driving information selected by the user is input to the controller 110 through the input unit 100.

Therefore, the control unit 110 starts the washing operation according to the operation information input from the input unit 100, and first determines whether the preliminary washing operation (S200).

In the case of the preliminary washing operation, the control unit 110 controls the water supply valve 122 through the driving unit 120 to start supplying the washing water necessary for the preliminary washing into the washing tank 20 through the washing water supply hole (not shown). (S202).

After the washing water supplied into the washing tank 20 flows into the sump 42 provided under the washing tank 20, the washing water introduced by the pumping action of the washing pump 46 inside the sump 42 is first and first. Preliminary water is sprayed to the upper spray nozzle 26a, the middle spray nozzle 26b and the lower spray nozzle 26c through the second supply pipe (28a, 28b) to spray the washing water at a high pressure to the dishes stored in the dish basket 22 The washing starts to proceed (S204).

When the preliminary washing is performed in the control unit 110 for a predetermined time, the turbidity sensor installed inside the sump 42 before draining the washing water because the contaminants on the dishes as well as the washing water is washed by the washing water and introduced into the sump 42. In operation 44, the light emitted from the light emitting unit 44a passes through the dishwashing wash water by using a photo coupler, and inputs an optical signal received by the light receiving unit 44b to the control unit 110 to store the dishwashing water during prewashing. Turbidity Tw is detected (S206).

Therefore, the controller 110 compares the turbidity Tw of the washing water detected by the turbidity sensor 44 with a predetermined reference turbidity Ts (the turbidity of the washing water for determining the number of times of preliminary washing) (S208). When the detected turbidity (Tw) of the wash water is less than the reference turbidity (Ts), it is determined that the contamination is not severe and drains the wash water containing the contaminants through the drain pipe 50 according to the operation of the drain pump 48 (S209). Finish prewash once.

On the other hand, if the turbidity (Tw) of the wash water detected as a result of the comparison is determined that the contamination is severe, depending on the difference value (Tw-Ts) of the detected wash water turbidity (Tw) and reference turbidity (Ts) The number of times of preliminary washing (about 2 to 3 times) is determined (S210), and the washing water containing contaminants is drained through the drain pipe 50 according to the operation of the drain pump 48 (S212).

At this time, the number of times of the preliminary washing determined is preset in the controller 110 according to the difference value Tw-Ts between the wash water turbidity Tw and the reference turbidity Ts.

When the number of times of preliminary washing is determined according to the difference value (Tw-Ts) between the wash water turbidity (Tw) and the reference turbidity (Ts), a series of water runs → washing water spraying → washing water drainage is performed according to the determined number of preliminary washing cycles. The preliminary washing administration is carried out (S214).

During the series of preliminary washing cycles, the controller 110 determines whether the preliminary washing process is performed for the determined number of times (S216), and when the preliminary washing time is not performed for the determined number of times, the number of times of the preliminary washing is determined. Continue with a series of pre-cleaning cycles, followed by wash water feed → wash water spray → wash water drain.

As a result of the determination, when the preliminary washing operation is performed for the determined number of times, the controller 110 controls the water supply valve 122 to perform the main washing after the preliminary washing, and supplies the washing water required for the main washing (S218).

The washing water supplied into the washing tank 20 is introduced into the sump 42 like the preliminary washing, and then, by the pumping action of the washing pump 46, the upper spray nozzle 26a, the stop spray nozzle 26b and the lower spray nozzle. Moved to (26c) and proceeds to the main wash in which the washing water is sprayed at a high pressure to the dishes stored in the dish basket 22 (S220), the washing water is the upper injection nozzle (26a) and the interruption injection nozzle (26b) and the lower injection nozzle Before moving to (26c), according to the number of times of pre-washing to adjust the wash water temperature of the wash as follows (S222).

① For 1 time of pre-cleaning (contamination degree approx.): Wash water temperature 55 ℃

② In case of two preliminary washes (during pollution): Wash water temperature 60 ℃

③ In case of 3 times of pre-washing (contamination degree steel): 65 ℃

The number of times of preliminary washing is determined according to the wash water turbidity, and the washing water temperature is controlled in this washing stroke according to the determined number of preliminary washings to ensure washing regardless of the type or degree of contamination.

As such, the washing is a temperature (about 55-65 ° C.) adjusted according to the number of times of pre-washing by driving the heater 30 before the washing water is injected at a high pressure by the pumping action of the washing pump 46. The washing detergent is introduced through a detergent input device (not shown) to be heated, so that the washing water of the warm water containing the washing detergent is sprayed onto the dishes stored in the dish basket 22 to wash the dishes.

When the main wash, in which the washing water temperature is adjusted according to the number of times of preliminary washing, proceeds, the controller 110 counters the progress of the main wash and passes the predetermined main washing time (about 15 minutes), that is, the main washing is completed. If it is determined that the authorization is not complete (S224), the main cleaning is continued until the main cleaning time elapses.

As a result of the determination, when the washing is completed, the dishwashing washing water is drained according to the operation of the drain pump 48 (S226), and the control unit 110 controls the water supply valve 122 to proceed with rinsing after the main washing. Supply the washing water required for rinsing (S228).

The washing water supplied into the washing tank 20 is introduced into the sump 42 in the same manner as the pre-washing or the main washing, and then, by the pumping action of the washing pump 46, the upper spray nozzle 26a and the stop spray nozzle 26b and Moved to the lower injection nozzle (26c) proceeds to the rinse in which the washing water is sprayed at a high pressure to the dishes stored in the dish basket 22 (S230), the washing water is the upper injection nozzle (26a) and the interruption injection nozzle (26b) and the lower The washing water temperature of the rinsing is adjusted as follows according to the number of times of preliminary washing before moving to the injection nozzle 26c (S232).

① For 1 time of pre-cleaning (contamination degree approx.): Rinse water temperature 60 ℃

② In case of two preliminary washes (during pollution degree): Rinsing water temperature of 65 ℃

③ In case of 3 times of pre-washing (contamination degree steel): Rinse washing water temperature 70 ℃

The washing water temperature in the rinsing stroke is adjusted according to the number of times of pre-cleaning determined by the washing water turbidity, so that the washing can be surely performed regardless of the type or degree of contamination.

As such, the rinsing is driven by the heater 30 before the washing water is injected at a high pressure by the pumping action of the washing pump 46 to a temperature (about 60 to 70 ° C.) adjusted according to the number of times of preliminary washing. Rinse the detergent from the dishes by spraying the heated hot water on the dishes, and during the final rinsing, add detergent to the dishes through the detergent input device (not shown) to spray the wash water of the hot water containing the detergent on the dishes. After the dishes are heated, the drying effect is obtained by a series of strokes in which the dishes are dried by latent heat.

When the rinsing in which the washing water temperature is adjusted according to the number of times of preliminary washing is performed, the control unit 110 counters the rinsing time to determine whether the rinsing time has elapsed, that is, whether the rinsing is completed (S234). If not, continue rinsing until the rinse time has elapsed.

As a result of the determination, when the rinsing is completed, the operation is terminated while draining the washing water in which all the strokes are completed according to the operation of the drain pump 48 (S236).

As described above, according to the washing control method of the dishwasher according to the present invention, by detecting the turbidity of the washing water during the preliminary washing to determine the number of times of preliminary washing, waste of washing water can be reduced There is an effect that can be prevented.

In addition, the present invention has the effect that the washing can be sure when the contamination is severe by adjusting the washing water temperature of washing and rinsing according to the number of times of pre-washing according to the wash water turbidity.

Claims (6)

Detect turbidity of the wash water during the washing process using the wash water, Determine the number of washes based on the detected turbidity of the wash water, The washing control method of the dishwasher, characterized in that for controlling the temperature of the washing water according to the determined number of washing. The method of claim 1, Detecting the turbidity of the wash water, Washing control method of the dishwasher, characterized in that for detecting the turbidity of the wash water in the pre-washing stroke of the dishwasher. The method of claim 2, Determining the number of washes, When the turbidity of the wash water is greater than the reference turbidity by comparing the detected turbidity of the wash water with a predetermined reference turbidity, the number of times of preliminary washing stroke is determined according to the difference value between the wash water turbidity and the reference turbidity. Wash control method. The method of claim 3, wherein The washing control method of the dishwasher, characterized in that the number of times of the preliminary washing stroke increases as the difference between the wash water turbidity and the reference turbidity increases. The method of claim 3, wherein Adjusting the temperature of the wash water, The washing control method of the dishwasher, characterized in that for controlling the washing water temperature of the washing or rinsing according to the number of times of the preliminary washing operation. The method of claim 5, Adjusting the temperature of the wash water, The washing control method of the dishwasher, characterized in that to control the washing water temperature as the number of times the preliminary washing stroke increases.

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