KR19980020976A - How to clean filter in dishwasher - Google Patents

Abstract

The present invention detects the cleaning time due to clogging of the filter in advance when the cleaning process by pumping the filter while filtering the food waste separated from the dishes through the filter when washing the dish to generate a filter cleaning alarm, The present invention relates to a filter cleaning time alarm method of the dishwasher, which prevents the washing force from being lowered due to the clogging of the filter due to the weakening of the pump or the bad influence on the pump. The present invention relates to a pump suction port of the dishwasher. An impeller and an impeller rotating speed sensor are mounted between the filter and the pump located in the pump, and the impeller rotating speed sensor detects the number of rotations of the impeller rotating at the flow rate of the washing water by the suction power of the pump. By comparing the detected rotational speed of the impeller with a predetermined predetermined rotational speed When the detected impeller rotation speed is above a predetermined predetermined rotation speed, the washing is performed, and when it is below, the filter cleaning time is sensed and alarmed, thereby lowering the cleaning power or adversely affecting the pump by weakening the suction force of the pump during the cleaning. Characterized in that it can be prevented.

Description

How to clean the filter of the dishwasher

The present invention relates to a filter cleaning time alarm method of the dishwasher, and in particular, when cleaning the filter by clogging the filter during the pumping process while filtering the food waste separated from the tableware through the filter when washing the dish in advance In the filter cleaning time alarm method of the dishwasher to prevent the cleaning power degradation or adversely affecting the pump by weakening the suction power of the pump due to the clogging of the filter during cleaning to prevent the filter cleaning time. It is about.

Generally, when washing with a dishwasher, the washing water is supplied to a predetermined level in a state where the dish to be washed is put in the washing room, and then a pump is driven to suction pump the supplied washing water into the pump and then spray nozzles. It is sprayed on the tableware to wash the food residue on the tableware while washing, and at this time, when the pump starts to pump, the filter provided at the front of the pump filters the food waste generated during the cleaning while pumping. .

If the filter does not filter the food dregs, the food dregs are introduced into the pump, and thus, the pumping action is not smoothed, and in a severe case, the pump may be constrained to damage the pump, thereby preventing the washing. Since the food waste will be filtered by the filter.

In this way, when the dish washing is performed while filtering food waste, the food waste accumulates in the filter and blocks the filter, so that the pump does not suck the washing water and the pump is idle, resulting in overheating. The user must clean the filter periodically because it causes damage to the pump.

Nevertheless, in the related art, a device for notifying the cleaning time of the filter of the dishwasher is not separately provided or is configured to detect the filter clogging in a load state acting on the pump. In the latter case, the pump detects only when the pumping action is performed. In case of detecting the filter cleaning time, the pump is already overloaded or idling. I had a problem that was shortened.

The present invention is located in the pump suction port of the dishwasher in order to prevent the deterioration of the suction force of the pump and the adverse effects of the pump in advance by detecting the filter cleaning time in advance when washing the dishes by filtering food waste with a filter A rotating impeller is mounted between the filter and the pump according to the washing water suction force of the pump to detect the rotation speed of the rotating impeller during the dish washing, and the rotation speed of the detected impeller is judged to determine the predetermined rotation speed. If less than the number of revolutions, characterized in that the filter is made to detect the alarm time.

1 is a schematic longitudinal sectional view of the dishwasher to which the present invention is applied;

Figure 2 is a schematic control block diagram of the dishwasher used in the present invention

Figure 3 is a flow chart for the filter cleaning time alarm method of the dishwasher of the present invention

Explanation of symbols on the main parts of the drawings

1: main body 2: washing room

3: injection nozzle 4: pump suction port

5: filter 6: heater

7: pump 8: impeller

9: impeller rotation speed detector

a: Operation signal input part b: Micom

c: water supply and drainage part d: water level detection part

e: Pump driving unit f: Heater driving unit

g: Rotation speed detection unit h: Alarm unit

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

1 is a schematic longitudinal sectional view of a dishwasher to which the present invention is applied, and a washing chamber 2 capable of washing dishes in the main body 1 is provided, and is located at the inner lower center of the washing chamber 2. A spray nozzle 3 for spraying the pumped washing water is provided, and a lower side of the inner side of the washing chamber 2 is provided with a pump suction port 4 for sucking the supplied washing water, and the pump suction port 4 is provided with a washing nozzle. A filter 5 for filtering the generated food waste is provided, and one side of the bottom surface of the washing chamber 2 is provided with a heater 6 for heating the washing water to be supplied, and the pump below the washing chamber 2. In the dishwasher provided with a pump (7) which is connected to the suction port (4) and sucks and pumps the washing water supplied and discharges the pumped washing water to the injection nozzle (3), the lower portion of the filter (5) Impeller 8 rotating at the flow rate of the washing water by the suction force of the pump (7) Predetermined position of the mounting, and the impeller 8 is mounted above the pump inlet (4) to the mounting hayeoseo the impeller rotation speed sensor 9 which detects the number of revolutions of the impeller (8).

2 is a schematic control block diagram of a dish washing machine used in the present invention, the operation signal input unit for setting and inputting a washing, rinsing, and drying stroke operation signals, which are a series of washing strokes, for a dish to be washed during dish washing (a (B) The driving signal input unit (a) controls the input driving signal by a predetermined program and outputs the controlled signal to control each driving unit, and the microcomputer (b) The water supply and drainage unit (C) for draining the water supplied to the washing chamber and the water supplied to the washing chamber by the control signal of (C), and the water level sensing unit for detecting the water level of the water and the water drained from the water supply and drainage unit (C). And, when the water supply is completed by a predetermined level by the water level detection unit (D), the pump driving unit (e) for washing and rinsing the dishes while spraying the pumped washing water by pumping the washing water, The heater driver (bar) for heating to a predetermined water temperature or drying dishes after washing and rinsing according to the control signal of the ecom (b) and the flow of washing water sucked when the pump driver (e) is driven. An impeller rotation speed sensor (G) for detecting the rotation speed of the impeller rotating at a speed, and an alarm unit (H) for generating an alarm by the control signal of the microcomputer (B).

3 is a flow chart for the filter cleaning time alarm method of the present invention, the water supply step 30 for supplying the washing water at a predetermined level in the initial state, and the washing water supplied in the water supply step 30 A water supply completion determination step 31 for determining whether water supply is completed at the water level, and if water supply is completed at a predetermined water level in the water supply completion determination step 31, a washing step 32 for driving a pump to wash dishes, and the In the washing step 32, the impeller rotation speed sensing step 33 for sensing the impeller rotational speed during the washing process for a predetermined washing time, and the impeller rotation speed detected in the impeller rotation speed sensing step 33 are preset. Impeller rotation determination step 34 for determining whether the rotation speed of the impeller (rotation speed of the impeller in the state that the filter is not clogged) and the impeller rotation speed detected in the impeller rotation determination step 34 If it is more than the predetermined number of rotations set to determine whether the ongoing washing is completed, if the washing is not completed, continue to wash, and if the washing is completed, the washing completion determination step 35 and the impeller rotation speed determination step In the alarm step 36 for alerting the filter cleaning time when the impeller rotation speed detected in the 34 is less than or equal to the predetermined predetermined rotation speed, the washing stop step 37 for stopping the dish washing when the alarm step 36 alarm occurs. And, if the washing is stopped in the washing stop step 37 is to clean the filter and the filter cleaning step 38 to proceed with the dish washing.

Referring to the operation of the present invention made as described above are as follows.

First, the operation signal for the washing, rinsing, drying, which is a series of washing administrations to be cleaned while putting the dishes in the washing room (2) of the dishwasher in order to wash the dishes with food waste after the completion of the meal When input to the microcomputer (B) through the input unit, the microcomputer (b) controls the operation signal input by a predetermined program, and the washing while outputting the controlled signal. That is, when the washing driving signal is input through the driving signal input unit (a), the microcomputer (b) goes to the feeding and draining step 30 and controls the feeding and draining driving unit (c) to supply the washing water to the washing room 2; In addition, the heater driving part (bar) is controlled to heat the washing water supplied to the heater 6 to a predetermined water temperature.

In the water supply while heating the washing water supplied in this way, the microcomputer (b) goes to the water supply completion judging step 31 to control the water level sensing unit d to supply the water level to the predetermined level (washing water level). In this case, if the water level is not supplied to the predetermined water level as a result of the determination, the microcomputer (b) controls the water supply / drainage driving unit (C) until the water supply is completed at a predetermined water level to proceed with water supply. .

On the other hand, when the water supply level is completed in the water supply completion determination step 31 to the predetermined water level, the microcomputer (b) goes to the washing step 32 to control the pump driving unit (e) to the pump (7) The pumped washing water is pumped, and the pumped washing water is washed while spraying the dishes placed in the washing chamber 2 through the spray nozzle 3, wherein the washing water pumped by the pump 7 is sprayed into the washing chamber ( 2) After filtering the food waste separated from the tableware by the filter (5) provided in the pump inlet (4) provided on one side of the inner lower side is sucked into the heater (6) and pumped while rotating the impeller (8) do.

While washing the dishes while pumping and spraying with the pump 7 as described above, the microcomputer (b) goes to the impeller rotation speed sensing step 33 to control the impeller rotation speed sensor (g) to control the impeller rotation speed sensor (9). Through the flow of the washing water flowing into the pump (7) through the rotational speed of the impeller (8) to vary the number of revolutions, and then in the micom (b) go to the impeller rotation speed determination step 34 It is determined whether the detected impeller rotational speed is equal to or greater than a predetermined predetermined rotational speed (the range which does not interfere with the pumping even if the food 5 is slightly caught in the filter 5). If the predetermined number of rotations or more, the microcomputer (b) does not have food waste stuck in the filter (5), so no filter clogging occurs, and the water is smoothly washed through the filter (5). It is determined that the suction by the pump (7) to continue the washing, and then go to the washing completion determination step 35 to determine whether the washing is currently in progress is completed, the determination result if the ongoing washing is not completed The washing process is performed from the washing step 32, and the washing process is performed until the washing is completed while detecting the impeller rotation speed and determining the cleaning time due to the clogging of the filter 5, and then the washing is completed. When the driving signal is input by the driving signal input unit (a), the next stroke is performed.

In the meantime, when the detected rotation speed is less than or equal to the predetermined rotation speed, the microcomputer (b) accumulates a large amount of food waste on the filter (5). It is judged that the washing water is not rotating the impeller 8 of the pump suction port 4 by blocking, and the microcomputer (b) goes to the alarm stage 36 and controls the alarm unit (h) to control the current filter (5). In addition, it alerts that a large amount of food waste has accumulated and goes to the washing stop step (37) to control the pump driving part (e) to stop the driving of the pump (7) being pumped to stop the rotating spray nozzle (3). After stopping the cleaning, go to the filter cleaning step (38) to allow the user to take out and clean the filter (5) clogged food waste accumulated, the filter (5), the cleaning is completed is again mounted on the pump suction (4) After It will be to proceed the washing until the washing is complete, as determined, but proceeds to go to the washing machine the washing step 32, the detected number of revolutions to the impeller and to detect cleaning time by the clogging of the filter (5).

As described above, the present invention is mounted on the pump suction port of the dishwasher to change the rotation speed according to the flow rate of the washing water passing through the filter between the filter for filtering the food waste generated during washing and the pump for suction pumping the supplied washing water. By mounting an impeller and an impeller rotation speed sensor for detecting the rotational speed of the impeller, by detecting the rotational speed of the impeller rotated by the hydraulic power by the washing water suction power of the pump during the cleaning and clogging the filter by the detected impeller rotational speed In other words, the filter cleaning time is alerted, so that food waste blocks the filter during washing, which prevents the washing power from being lowered due to the lowering of the pumping power and prevents overloading of the pump, thereby prolonging the life of the pump. It will provide an effect.

Claims (1)

The impeller 8 and the impeller rotating speed sensor for detecting the rotational speed of the impeller between the filter 5 mounted on the pump suction port 4 of the dishwasher and the pump 7 by the washing water suction force of the pump 7 9) to detect the number of revolutions of the impeller rotating at the flow rate of the washing water by the suction force of the pump 7 with the impeller rotation speed sensor 9 during dish washing, and the rotation speed of the detected impeller When the detected impeller rotation speed is compared with a predetermined rotation speed, the washing process is performed when the detected impeller rotation speed is higher than the predetermined rotation speed, and when the filter cleaning time is detected, the filter cleaning time alarm method of the dishwasher, characterized in that it is made. .