KR0184387B1 - Dish washer - Google Patents

Abstract

The present invention relates to a control method of a dishwasher, even if the water is excessively supplied in the washing tank during washing the dish, it is convenient and easy to wash the dish by continuing the washing after draining the appropriate amount of water, The dish washing is not interrupted in the middle, so there is no need to repeat the operation required for washing.

Description

How to control your dishwasher

The present invention relates to a control method of a dishwasher, and more particularly, to a control method of a dishwasher which continues washing even when water is excessively supplied into the washing tank while the dishes are being washed.

As shown in the flowchart of steps S50 to S61 of FIG. 1, in the conventional dishwasher, the user turns on the power switch of the dishwasher (S50), selects a washing course (S51), and then turns on the operation switch. If it is (S52) the water supply proceeds (S53).

Next, the control means (not shown) senses the frequency of the water level sensor (not shown) (S54), and if the frequency of the water level sensor is equal to the frequency of the normal water level preset in the control means (YES), the water supply is stopped and then washed. The washing is performed by operating the motor (S55).

The control means continuously detects the frequency of the water level sensor during the washing (S56), and if the frequency of the water level sensor is lower than the frequency of the abnormal water level (if NO), it determines whether or not the progress of the washing course is finished (S57). As a result of this determination, when the progress of the washing course is finished (YES), the voltage supplied to the loads of the feed valve, feed pump and heater is cut off (S58).

On the other hand, if the frequency of the water level sensor in step S56 is equal to the frequency of the abnormal level (YES), the control means cuts off the load of the feed pump and the heater (S59). Next, after the water is drained (S60), an indication that the water is excessively supplied into the washing tank is indicated on the display means (not shown) because there is an error in the water supply valve.

However, the conventional dishwasher as described above has a problem that the washing of the dishes is stopped by stopping the water supply when detecting the abnormal water level in the washing tank as described above.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a method of controlling a dishwasher, which can conveniently and easily wash dishes.

In order to achieve the above object, the control method of the dishwasher according to the present invention includes an abnormal level determination step of determining whether water is excessively supplied into the washing tank while washing the dishes, and excessive water in the washing tank in the abnormal level determination step. If it is determined that the supply is a washing progress step of continuing to wash the dishes, after the washing of the dishes is finished, the abnormal state notification step of informing the user of the abnormal state of the water supply valve.

1 is a flowchart of a control method of a dish washer according to the prior art,

2 is a control circuit block diagram of a control device for a dish washing machine according to an embodiment of the present invention;

3 is a flowchart of a control method of a dish washer according to one embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

108: memory 116: water level sensor

120: water supply valve 122: water supply pump

126: drain pump drive circuit 128: drain pump

130: abnormal state notification means 132: display unit

134: sound generator

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

As shown in Fig. 2, the control means 102 is a microcomputer for controlling the washing operation.

The power supply means 104 is connected to the control means 102 to receive an AC voltage output from an external AC power source 106 via a power switch 105 to supply a DC voltage to the control means 102. have.

The memory 108 is connected to the control means 102 to store various data necessary for cleaning.

The key input means 110 is connected to the control means 102 to input a user's command to the control means 102.

The temperature detecting means 112 is a thermistor connected to the control means 102 to detect the temperature of the air of the washing tank.

The door open / close detection means 114 is connected to the control means 102 to detect that the door (not shown) is opened / closed.

The water level sensor 116 is connected to the control means 102 to output a frequency corresponding to the water level in the washing tank to the control means 102.

The water supply circuit 118 is connected to the control means 102 and the power switch 105 to drive the water supply valve 120 and the water supply pump 122 according to the control signal output from the control means 102. Circuit.

The heating circuit 124 is connected to the control means 102 and the power switch 105 to heat the heater 125 in accordance with a control signal output from the control means 102 to dry the dishes in the washing tank. It is a switching circuit.

The drain pump driving circuit 126 is a switching circuit connected to the control means 102 and the power switch 105 to drive the drain pump 128 in accordance with the control signal output from the control means 102.

The abnormal state notification means 130 receives the display signal from the control means 102 and the display unit 132 for displaying the user's operation command, the state of the washing operation and the abnormal state of the water supply valve 120 to the user, Receiving a sound signal from the control means 102 is composed of a sound generating unit 134 for generating a sound to inform the user of the user's operation command, the state of the washing operation and the abnormal state of the water supply valve 120.

Hereinafter, a method of controlling a dish washing machine according to an embodiment of the present invention will be described with reference to FIG. 3.

In Fig. 3, S denotes a step STEP.

As an initial condition for the operation description, it is assumed that the power switch 105 is turned off, the dishes are placed in the washing tank inside the door, the door is closed, and the power plug is inserted into the outlet.

First, in step S1, the user turns on the power switch 105. Then, an AC voltage of 220 V is output from the external AC power supply 106 to the power supply means 104 via the power switch 105. Subsequently, a DC voltage of 5 V is output from the power supply means 104 to the control means 102.

Next, in step S2, the user selects the washing course by pressing one of the soak, strong, standard, and saving buttons installed in the key input means 110. The washing course is then output from the key input means 110 to the control means 102.

Subsequently, in step S3, the control means 102 determines whether the operation switch of the key input means 110 is on. As a result of this determination, when the user determines that the operation switch is turned on by pressing the operation switch, the process proceeds to step S4 (if YES).

In step S4, the control means 102 sets the value of ERROR, which is a display character designated in the memory 108, to 0 to indicate whether there is an abnormality in the water supply valve 120.

Next, a control signal is output from the control means 102 to the water supply circuit 118 in step S5. Next, a voltage is applied from the water supply circuit 118 to the water supply valve 120. Subsequently, the water supply valve 120 is opened to supply water from the external water supply pipe into the washing tank. Water supplied into the washing tank is supplied to a sump (not shown).

Subsequently, in step S6, the pressure of the water in the washing tank is transmitted to the water level sensor 116 installed below the washing tank. Then, the frequency corresponding to the water level in the washing tank is output from the water level sensor 116 to the control means 102. Then, the control means 102 compares the frequency output from the water level sensor 116 with the set frequency input from the memory 108 to determine whether the water level in the washing tank is equal to the normal water level preset in the memory 108. Determine. As a result of this determination, when it is determined that the water level in the washing tank is equal to the normal water level preset in the memory 108, the flow proceeds to step S7 (if YES).

In step S7, a voltage is applied from the water supply circuit 118 to the water supply pump 122. By the operation of the feed water pump 122, water stored in the sump is injected into the tableware through the nozzle guide. The dish is then washed. The set washing course then follows.

In step S8 during the course of the washing course as described above, it is determined whether the water level in the washing tank is higher than the abnormal water level preset in the memory 108. As a result of the determination, when it is determined that the level in the washing tank is not higher than the abnormal level set in the memory 108, the flow in the washing tank is normal (if NO), and the flow proceeds to step S9.

In step S9, the control means 102 determines whether the washing course is finished by determining whether the preset washing time has elapsed in the memory 108 in response to the washing course. As a result of this determination, if it is determined that the washing course is finished, the process proceeds to step S10 (if YES).

In step S10, the control means 102 determines whether the display character ERROR is one. If it is determined that the display character ERROR is not 1, the water supply valve 120 is in a normal state (if NO), and the flow proceeds to step S11.

In step S11, a control signal is output from the control means 102 to the water supply circuit 118, the heating circuit 124, the drain pump driving circuit 126, the display unit 132 and the sound generating unit 134. Subsequently, no voltage is applied to the feed water pump 122 from the feed water circuit 118, and no voltage is applied to the feed water valve 120. Then, the operation of the water supply pump 122 is stopped, and the water supply valve 120 is closed. At the same time, no voltage is applied to the heater 125 from the heating circuit 124, so that the heater 125 does not generate heat. Since no voltage is applied from the drain pump driving circuit 126 to the drain pump 128, the operation of the drain pump 128 is stopped. At the same time, the display unit 132 indicates that the washing course selected by the user is finished, and the sound generating unit 134 generates a sound indicating that the washing course selected by the user is finished.

On the other hand, if it is determined in step S8 that the water level in the washing tank is higher than the abnormal water level preset in the memory 108 (in case of YES), the water supply valve 120 has an abnormality and the water level in the washing tank is excessively high. Since it is high, the flow advances to step S12.

In step S12, the control means 102 stores in the memory 108 the remaining portion of the washing course that has not been advanced.

Next, in step S13, a control signal is output from the control means 102 to the water supply circuit 118 and the heating circuit 124. Subsequently, no voltage is applied to the feed water pump 122 from the feed water circuit 118, and no voltage is applied to the feed water valve 120. Then, the operation of the water supply pump 122 is stopped, and the water supply valve 120 is closed. At the same time, no voltage is applied to the heater 125 from the heating circuit 124, so that the heater 125 does not generate heat.

Next, in step S14, the control means 102 sets the value of ERROR, which is a display character designated in the memory 108, to indicate whether or not there is an abnormality in the water supply valve 120.

Subsequently, a control signal is output from the control means 102 to the drain pump driving circuit 126 in step S15. Next, a voltage is applied from the drain pump driving circuit 126 to the drain pump 128. Then, the drain pump 128 operates to drain the water in the washing tank to the outside of the washing tank.

Next, in step S16, the control means 102 determines whether the water level in the washing tank is below the normal water level based on the frequency output from the water level sensor 116. As a result of this determination, the control means 102 proceeds to step S17 (if YES) when it is determined that the water level in the washing tank is below the normal water level based on the frequency output from the water level sensor 116.

Next, in step S17, the control means 102 reads out the remaining portion of the washing course stored in the memory 108, which has not progressed. Subsequently, a control signal is output from the control means 102 to the water supply circuit 118 and the heating circuit 124. The rest of the cleaning course will then proceed.

Next, the flow advances to step S8 to determine whether the water level in the washing tank is higher than the abnormal water level preset in the memory 108 as described above.

On the other hand, if it is determined in step S16 that the water level in the washing tank is higher than the normal water level, the control means 102 proceeds to the step S15 (if NO) and drains the water in the washing tank as described above.

On the other hand, when the control means 102 determines that the display character (ERROR) is 1 in step S10 (if YES), the water supply valve 120 is in an abnormal state and the flow proceeds to step S18.

In step S18, the control means 102 determines whether the water level in the washing tank is higher than the abnormal level set in the memory 108 in advance. As a result of this determination, when the control means 102 determines that the water level in the washing tank is higher than the abnormal water level preset in the memory 108, the process proceeds to step S19 (if YES).

In step S19, a control signal is output from the control means 102 to the drain pump driving circuit 126. Next, a voltage is applied from the drain pump driving circuit 126 to the drain pump 128. Then, the drain pump 128 operates to drain the water in the washing tank to the outside of the washing tank.

Next, in step S20, a display signal is output from the control means 102 to the display unit 132 and an acoustic signal is output from the control means 132 to the sound generator 134. Subsequently, since the display unit 132 has an abnormality in the water supply valve 120, the user displays a mark to check the water supply valve 120. At the same time, the sound generator 134 generates a warning sound to check the water supply valve 120 because there is an error in the water supply valve 120.

Subsequently, in step S21, the control means 102 determines whether the level of the voltage supplied from the power supply means 104 to the input terminal I2 of the control means 102 is higher than or equal to the reference level set in the memory 108. By discriminating, it is determined whether an AC voltage of 220 V is supplied from the AC power supply 106 to the power supply means 104. As a result of this determination, the level of the voltage supplied from the power supply means 104 to the input terminal I2 of the control means 102 is less than the reference level set in the memory 108, and thus the AC power supply 106 is used. If it is determined that the AC voltage of 220V is not being supplied to the power supply means 104 (when NO), the user turns off the power switch 105 or checks the power plug to check the water supply valve 120. Since it is disconnected from an outlet, the control program of the above-mentioned abnormal state notification is terminated.

On the other hand, when the control means 102 determines that the water level in the washing tank is not higher than the abnormal level set in the memory 108 in the step S18 (if NO), the process proceeds to the step S20 and the above-mentioned. Inform the user of the abnormal state of the water supply valve 120 as well.

On the other hand, in step S21, the level of the voltage supplied from the power supply means 104 to the input terminal I2 of the control means 102 is equal to or higher than the reference level set in the memory 108 so that the AC power supply 106 is used. When it is determined that the AC voltage of 220V is supplied to the power supply means 104 from (step NO), since the user has not yet taken the necessary measures to check the water supply valve 120, the step S18 As described above, it is determined whether the water level in the washing tank is higher than the abnormal water level preset in the memory 108.

On the other hand, when the control means 102 determines that the operation switch is not turned on in step S3 (if NO), the user turns on the operation switch of the key input means 110 in step S3. waiting.

On the other hand, if it is determined in step S6 that the water level in the washing tank is not equal to the preset normal water level in the memory 108 (if NO), since there is not enough water yet to wash the dishes in the washing tank. Proceeding to step S5, water is continuously supplied to the washing tank as described above.

On the other hand, if the control means 102 determines that the progress of the cleaning course has not been completed in step S9 (if NO), the process proceeds to step S7 to continue the cleaning course as described above.

As described above, according to the control method of the dishwasher according to the present invention, even if water is excessively supplied into the washing tank while the dishes are being washed, the washing of the dishes is convenient and easy by continuing the washing after draining the appropriate amount of water. It has a very good effect. In other words, the dish washing is not interrupted in the middle, so it is not necessary to repeat the operation required for washing.

Claims (2)

An abnormal water level determining step of determining whether water is excessively supplied into the washing tank while washing the dishes, and a washing progress step of continuing to wash the dishes when it is determined that the water is excessively supplied into the washing tank in the abnormal water level determining step; , After the washing of the dishes is finished control method of the dishwasher, characterized in that the abnormal state notification step of notifying the user of the abnormal state of the water supply valve. The method according to claim 1, wherein in the washing step, the drain pump is operated to maintain the water level in the washing tank at the normal level.