KR950002454B1 - Method of controlling water level in tableware washing machine - Google Patents

Abstract

The method includes the steps of setting an amount of water supply, supplying hot water while water level is checked for a predetermined time when hot water is selected, judging the water temperature is abnormal or not, controlling the abnormal water temperature by supplying cool water and hot water, stopping supplying water and draining water if water temperature is not abnormal, supplying cool water if hot water is not selected, supplementing water if the cool water does not reach a predetermined level or the water is in an appropriate temperature.

Description

How to control water in your dishwasher

1 is a block diagram of a water supply control device of a dish washing machine according to the present invention.

2 is a to c control flow chart showing a water supply control method of the dishwasher according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Key input unit 2: Water level detection unit

3: water temperature detection unit 4: control unit

5: water supply valve drive unit 6: step motor drive unit

7: Step motor 8: Main motor drive unit

9: main motor

The present invention relates to a water supply control method of a dishwasher, and more particularly, to a water supply control method of a dishwasher, which divides the washing chamber of the dishwasher into an upper washing chamber and a lower washing chamber and enables the selection of hot water supply.

In the conventional dishwasher, one washing chamber is partitioned within the body, and inside the old washing chamber, a transfer rack in which dishes are arranged is installed in two stages above and below, and an injection device is provided below each transfer rack. Is installed, a collecting part is formed at the bottom of the washing chamber, is pumped to a predetermined water pressure by a main pump of the washing water collected in the collecting part, and is supplied to the two injection apparatuses, and the washing water is supplied by the injection apparatus. It was sprayed on the dishes placed in the transfer rack to wash the dishes.

In the conventional dishwasher, water is supplied from the outside at the start of washing, and only cold water is selected. That is, a water supply valve is provided, and the water supply valve is connected to a tap for supplying a cold water, and a water level detection device is installed in the water collecting unit to receive water to a certain level, and then pump the washing water by a pump. Dish washing was to be performed.

However, since the conventional dishwasher is divided into one washing chamber, the washing water pumped from the pump is supplied to the injector in the washing chamber irrespective of the amount of dishes so that water is sprayed to both the upper and lower transfer racks. When the amount of tableware is small, there is a problem in that efficiency is reduced such as waste of water and waste of power.

Therefore, according to the dishwasher previously filed by the present applicant in order to use the dishwasher efficiently according to the amount of dishes to be cleaned, when the washing chamber is divided into two upper and lower portions, and only the upper washing chamber is used according to the capacity of the dishware, In case of using only the lower washing room or using both upper and lower washing room, the washing room can be used separately. Accordingly, it is possible to increase the use efficiency of the dishwasher by selectively using the washing room according to the amount of dishes and by setting the water supply level differently in each case.

Therefore, if the washing room temperature is divided into two, the water supply according to the use of the washing room is selected differently to improve the use efficiency of the washing machine. The efficiency of separating and using the wash chamber is inferior.

In addition, the washing efficiency of the dishwasher is heated to a proper water temperature during the washing operation so that the washing is performed by hot water, thereby improving the washing efficiency and drying by the latent heat. Since hot water can be supplied at any time in the home according to the use, when the hot water is supplied to the dishwasher using this, it is possible to reduce power waste or heating time for heating the water temperature of the washing water to the desired washing water temperature. However, the conventional water supply control method is based on the premise of cold water supply, and thus requires time for receiving cold water and heating the water temperature of the washing water through the heater to match the washing water temperature, and there is a waste of power due to heating.

An object of the present invention is to provide a water supply control method of the dishwasher to receive water by the appropriate water level according to the choice of use of the washing room, and to receive hot water.

The object of the present invention is to set the water supply amount according to the washing room selection and determine whether hot water is selected, the initial water supply step of receiving hot water while checking the water level for a predetermined time at the time of hot water selection, and the initial hot water An abnormal water temperature discrimination step of determining whether or not the abnormal water temperature by checking the water temperature while pumping after the damp water, and after draining at the abnormal water temperature detection, select to mix the cold water and hot water to receive water and return to the initial hot water supply step. In the case of the abnormal abnormal temperature treatment step and the non-ideal temperature temperature, the water temperature check process is performed for a predetermined time, and when the water temperature is lower than the optimum temperature, the water supply is stopped and drained, and then the proper water temperature is returned to the initial water supply stage. If the hot water is not selected in the step and the initial step, if the water level is higher than the set level by receiving cold water while checking the water level, After the pumping in between, the cold water supply step to go to the next stroke, and if the set water level is not reached for a predetermined time in the cold water supply step, when it is determined that the proper water temperature in the proper water temperature determination step and the proper water temperature determination step If the number exceeds the predetermined number of times, check the water level while receiving additional water supply for a predetermined time, and when the water level is reached, stop the water supply and perform the next stroke, and if the water level is not reached even after performing the additional water supply, It is achieved by configuring the water supply control method of the dishwasher according to the present invention to perform the water supply error determination step of processing the water supply error.

Hereinafter, an embodiment of a water supply control method of a dish washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a water supply control apparatus for performing a water supply control method of a dish washing machine according to the present invention. As shown therein, the washing compartment is divided into two and each washing chamber is selectively and used according to the amount of dishes. As a dishwasher, a key input unit 1 for inputting various control key signals such as washing chamber selection, cold water / hot water selection, and washing temperature selection by a user, and a water level detection unit for detecting the water level of the water supplied in the reservoir (2) and water supply based on the water temperature detection unit 3 for detecting the water temperature of the washing water in the reservoir, the key signal of the key input unit 1, and the detection signals of the water level detection unit 2 and the water level detection unit 3 Control unit 4 for controlling the overall operation of the dishwasher, a water supply valve drive unit 5 for controlling the cold water valve and the hot water valve based on the control of the control unit 4, and the control unit 4 Under the control of It is composed of the step motor driving unit 6 and the main drive motor (8) for driving the main motor 9 on the basis of the control of the control section 4 for driving the motor (step motor) (7).

Here, the step motor (7) is to drive a multi-way valve (multiw-ay valve) for selecting the flow path of the wash water, the main motor (8) is to drive a pump for pumping the wash water. In addition, the heater drive part, the display part drive part, etc. are not shown in figure.

According to the water supply control device of the dishwasher configured as described above, a water supply control program is embedded in the control unit 4, and the water supply amount (ie, the water level) according to the washing room selection is stored in advance, and the user uses it according to the amount of dishes. If you select the desired washing room, and also select the use of hot water / cold water, the controller 4 finds the corresponding water supply amount among the pre-stored water supply amount and set the water supply level, and then the water supply valve drive unit according to the use of the hot water / cold water selection Through (5), the hot water / cold water supply valve is controlled to receive water.

Subsequently, when receiving cold water while receiving water, water temperature is detected only when hot water is supplied without water temperature detection and water supply control is performed according to the water temperature. Will receive. In addition, the water supply is controlled to selectively switch to the injection device or the drain of the washing chamber through the step motor drive unit 6, and the main motor 9 is driven through the main motor drive unit 8 to operate the pump. Control.

On the other hand, the water supply control method of the dish washing machine according to the present invention will be described based on the control flow chart shown in FIG.

First, when the user puts the dishes in the washing room, selects the washing room and selects the use of hot / cold water, the user performs initial draining for a predetermined time to drain the washing water that may remain in the receiving unit, and selects the washing room. According to the pre-stored water supply amount of each washing room by selecting the corresponding water supply level (hereinafter set water level; Wh), and performs the initial step of determining whether hot water selection.

Subsequently, when the hot water is selected, the hot water valve is opened to receive hot water, and the first timer t1 for checking the pure water supply time is initialized and turned on, and the detected water level Wp and the set water level are detected from the water level detector 2. Compared with the set water level (Wh), if the water level is not reached, the initial water supply stage to continue to receive hot water while detecting the water level until the first timer t! Elapses a predetermined time (for example, 30 seconds) Perform

At this time, when the detected water level (Wp) is higher than the set water level (Wh) in the initial stage of hot water supply, after stopping the water supply, the pump is turned on to spray the washing water into the washing chamber and to check the initial pumping time. 2 The timer t2 is initialized and turned on. When the predetermined time of the first timer t1 has elapsed while the detection water level Wp has not reached the set water level Wh in the hot water initial water supply stage, the pump is supplied with water supply. Turn on the second timer t2. Then, after the pumping time is a predetermined time (for example, 5 seconds), the water temperature check is started through the water temperature detection unit 3, and it is determined whether the detected water temperature T is an abnormal water temperature (for example, 80 ° C). Perform the abnormal water temperature determination step.

If the detected water temperature (T) exceeds 80 ° C. in the abnormal water temperature determination step, hot washing water may be sprayed on the dishes and the dishes may be broken. In this case, after the water supply is stopped and drained, the cold water valve and the hot water After the valves are opened at the same time and selected to receive lukewarm water, the abnormal water temperature treatment step of returning to the process of determining the water level while receiving pure water for the set time of the first timer t1 is performed.

On the other hand, if the water temperature (T) detected in the abnormal water temperature determination step is within the abnormal water temperature (80 ° C), the detected water temperature is a proper water temperature (wherein, the proper water temperature is a predetermined temperature, and is not a water temperature heated by the Herti, If the temperature is lower than the appropriate water temperature, the second timer t2 has passed 30 seconds, and if the second timer t2 has not passed 30 seconds, When the water level is checked and the water level is higher than the set water level, the water supply is stopped and the flow returns to the water level checking step. When the water level is not reached, the water level is continuously received and the flow returns to the water level checking step. After that, when the time when the second timer t2 has passed 30 seconds has elapsed, the number N is increased by one, and the number of times is more than a predetermined number of times (example 3). If it is within the number of times, after stopping the water supply and draining, it returns to the initial hot water supply step and performs the appropriate water temperature determination step of repeating the process.

Here, in the step of determining the proper water temperature, if the detected water temperature is less than the proper water temperature, the process of draining and receiving water again and repeating the water temperature check is repeated a predetermined number of times, and after that, if the desired water temperature checking process is repeated a predetermined number of times, it is not the desired water temperature. Next, the flow goes to the water supply error discrimination step.

In addition, if the hot water is not selected in the initial stage, as shown in Figure 2 (b) performs a cold water supply step, by opening the cold water valve to receive the cold water to supply the first timer

When t1 is turned on, the water level is checked, and when the detected water level Wp becomes higher than the set water level Wh within the time (30 seconds) of the first timer t1, the water supply is stopped and the pump is turned on, and the second timer t2 Is turned on and pumped for 30 seconds of the second timer t2, and then the next stroke is performed. Further, if the set water level is not reached until the first timer t1 has passed 30 seconds, the second timer t2 is turned on while operating the pump simultaneously with water supply.

Subsequently, when the water level is checked and the detected water level Wp becomes higher than the set water level Wh, the water supply is stopped and the pump is operated, the second timer t2 waits for 30 seconds to elapse, and then the water supply control ends. If the detection level Wp does not reach the set level Wh until the second timer t2 has passed 30 seconds, the water supply error determination step is performed.

In addition, as shown in FIG. 2C, when the detection water temperature T is higher than the optimum water temperature (40 ° C.) in the proper water temperature determination step, pumping is continued while checking the water level until the second timer t2 reaches 30 seconds. When the set water level is reached at this time, the water supply is stopped and the second timer t2 waits until 30 seconds has elapsed, and after completing the water supply stroke, the next stroke is performed. If the detected water level (Wp) does not reach the set water level (Wh) until the water level is exceeded, the additional water supply fourth timer t4 for discriminating the water supply error is turned on, and the fourth water supply tpm is kept running for one minute. The water level is checked until the water level is reached.At this time, if the water level is reached, the next stroke is performed.If the water level does not reach the water level until 1 minute of the fourth timer t4 has elapsed, the water level error is determined and a water supply error is indicated or an alarm is issued. to do The.

As described above, according to the present invention, in the dishwasher in which the washing chamber is divided into two sections, water is supplied at different set levels according to the washing chamber used, thereby effectively saving water and using hot water. Since the water is supplied at the proper water temperature, the process of heating the water through the heater at the time of cleaning can be omitted, thereby reducing the inherent time, and thus reducing the power consumption and saving time. When the abnormal water temperature is detected at the time, each part of the dishware and the washing machine can be protected, and if the set water level is not reached within a predetermined time at the time of water supply, the water supply error can be discriminated and water supply error processing can be performed.

Claims (5)

The initial stage of setting the water supply according to the selection of the washing room and determining whether the hot water is selected, the initial hot water stage of receiving hot water while checking the water level for a predetermined time when the hot water is selected, and the water temperature while pumping after the initial hot water of the hot water. An abnormal water temperature determination step of checking whether or not the abnormal water temperature is checked, and draining the water at the time of detecting the abnormal water temperature, and then mixing the cold water and the hot water to receive water and returning to the initial water supply step of the hot water; If the temperature is less than the appropriate water temperature by performing the water temperature check process for a predetermined time in the case of not the abnormal water temperature, stopping the water supply and draining the water, and then returning to the initial hot water supply step of the hot water, and in the initial step If it is not hot water selection, if the cold water is supplied while checking the water level and the water level is higher than the set water level, pump the pump for a predetermined time and then proceed to the next line. Cold water supply step to go to the positive, and if the set water level is not reached for a predetermined time in the cold water supply step, when it is determined that the proper water temperature in the proper water temperature determination step and the appropriate water temperature determination frequency in the proper water temperature determination step When the water level is over the predetermined number of times, check the water level while receiving additional water for a predetermined time, and when the water level is reached, stop the water supply and carry out the next stroke.If the water level is not reached even after the additional water supply, Water supply control method of the dishwasher, characterized in that to perform a water supply error determination step of processing as an error. According to claim 1, wherein the abnormal water temperature determination step, if the detected water level (Wp) is higher than the set water level (Wh) in the hot water initial water supply step, the water supply is stopped, the pump is turned on, the second Initializing the timer t2 and turning on the pump together with the water supply when the predetermined time has elapsed while the detection water level Wp has not reached the set water level Wh in the hot water initial water supply step. 2 turning on the timer t2, starting the water temperature check after a predetermined time has elapsed, and determining whether the detected water temperature T is an abnormal water temperature. Dishwasher water supply control method, characterized in that. The method of claim 2, wherein the determining the proper water temperature comprises: determining whether the detected water temperature is greater than or equal to the optimum water temperature if the water temperature T detected in the abnormal water temperature determination step is within the abnormal water temperature, and the detected water temperature is an appropriate water temperature. In case of abnormality, the pumping is continued while the second timer t2 checks the water level until a predetermined time elapses, and the detection water level Wp is a set water level Wh until the second timer t2 elapses the predetermined time. Is not reached, the flow proceeds to the water supply error determination step, and when the second water level t2 reaches a set level before a predetermined time elapses, when the water supply is stopped and the second timer t2 elapses a predetermined time Waiting until after, performing the next stroke, and if the detected water temperature is less than the appropriate water temperature, determining whether the second timer t2 has passed a predetermined time, and the second timer t2 If the predetermined time has not elapsed, the water level is checked and the water supply is stopped when the water level is higher than the set water level. When the water level is not reached, the water supply is continued and the process returns to the abnormal water temperature determination step; If the second timer t2 has passed a predetermined time in a state of less than a suitable water temperature, increasing the number of times for determining the appropriate water temperature by 1, checking whether the number is greater than or equal to the predetermined number of times, and determining the number of times for determining the appropriate temperature of the predetermined temperature. If it is within the water supply is stopped, and after draining, the dishwasher water supply control method characterized in that the step of performing the step of returning to the initial hot water supply step. The method of claim 1, wherein the cold water supply step comprises: opening the cold water valve to turn on the first timer t1 while receiving cold water when the hot water is not selected in the initial step, and then checking the water level. Determining whether the time of the timer t1 has elapsed, and when the detected water level Wp is equal to or higher than the set water level Wh before the predetermined time elapses by the first timer, the water supply is stopped and the pump is turned on. The second timer t2 is turned on and the second timer t2 is pumped while the predetermined time has elapsed, and the next stroke is performed; and the first timer t1 has passed the predetermined time without reaching the set water level. When the pump is operated at the same time as the water supply, turning on the second timer t2, and then checking the water level until the second timer t2 has passed a predetermined time, the detected water level Wp becomes the set water level Wh. reach up to If not, the water supply error determination step is performed, and if the detected water level Wp becomes above the set water level Wh before the second timer t2 passes the predetermined time, the water supply is stopped and the pump is operated. Waiting until the second timer t2 has elapsed a predetermined time, and then performing the next administration step. According to claim 1, wherein the water supply error determination step, when the predetermined water level is not reached for a predetermined time in the cold water supply step, when the proper water temperature is determined in the proper water temperature determination step and the appropriate water temperature in the proper water temperature determination step When the number of times of discrimination is greater than or equal to a predetermined number of times, turning on the fourth timer t4 for water supply error determination, continuing to operate the water supply and pump, and checking the water level until the fourth timer t4 reaches a predetermined time; If the detection level reaches the setting level before the fourth timer t4 has elapsed, the next stroke is performed. If the detection level does not reach the setting level until the predetermined time of the fourth timer t4 has elapsed, the water supply error The water supply control method of the dishwasher, characterized in that to perform the step of determining the water supply error.