KR20100009882A

KR20100009882A - Cleaning device

Info

Publication number: KR20100009882A
Application number: KR1020080070699A
Authority: KR
Inventors: 박경용
Original assignee: 엘지전자 주식회사
Priority date: 2008-07-21
Filing date: 2008-07-21
Publication date: 2010-01-29

Abstract

The washing machine according to the present invention includes a tub, a pump for supplying washing water to the tub, a sump formed in the tub to store the washing water, a turbidity sensor disposed on the sump to measure the turbidity of the washing water, and the pump. And a control unit to stop the operation and determine the turbidity value on the basis of the turbidity average value of the turbidity values measured by repeating the turbidity of the wash water a plurality of times in the turbidity sensor for a predetermined time.

Description

Cleaning device

The present invention relates to a washing machine, and more particularly to a washing machine for measuring an accurate turbidity value.

Conventional washing machines are heavily influenced by suspended solids formed in the wash water of the sump in measuring turbidity. A lot of suspended solids in the wash water did not accurately measure the turbidity value of the right wash water. In addition, the turbidity value of the wash water has a problem that varies the characteristics depending on the time and the number of times to measure the turbidity value. Therefore, there was a problem that the operation efficiency of the washing machine running on the basis of the turbidity value is not accurately measured turbidity value.

An object of the present invention is to provide a washing apparatus for determining the turbidity value based on the average value of the turbidity values measured during different measurement times.

The present invention provides a tub, a pump for supplying washing water to the tub, a sump formed in the tub to store the washing water, a turbidity sensor disposed on the sump to measure the turbidity of the washing water, and the pump It provides a washing apparatus including a control unit for stopping the operation and determining the turbidity value based on the turbidity average value of the turbidity values measured by repeating the turbidity of the wash water a plurality of times in the turbidity sensor for a predetermined time.

In addition, the present invention can be measured by varying the time and the number of times the control unit measures the turbidity value.

The present invention can measure the turbidity value for different times and different times for measuring the turbidity value measured by the turbidity sensor. Thus, the washing machine can measure accurate turbidity values. In addition, the washing machine is easy to precise cleaning based on the accurate turbidity value, thereby ensuring the reliability from the user.

1 is a perspective view showing an embodiment of a washing machine 100 according to the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1. 3 is a block diagram showing the control flow of the washing machine 100 shown in FIG.

1 to 3, the washing apparatus 100 supplies a cabinet 110, a washing tank 133 formed inside the cabinet 110 to accommodate dishes, and washing water from the outside to the washing tank 133. The washing water supply device (not shown), the shelves 121 and 122 are accommodated so that the dishes are washed by the washing water, and the nozzles (131, 132) installed to spray the washing water to the shelves (122, 122). The washing water supply device includes a sump 140 disposed inside the washing tank 133 to store the washing water, a pump 150 installed at one side of the sump 140 to pump the washing water in the sump 140, and a pump 150. And spray paths 151 and 152 installed to guide the washing water pumped from the nozzles to the nozzles 131 and 132.

The cabinet 110 includes a cabinet body 111 whose one side is opened to allow tableware to enter and exit, and a door 112 that is rotatably coupled to the cabinet body 111 to open and close an entrance hole formed in the cabinet body. The door 112 includes a blower assembly 113 capable of discharging the humid air of the washing tank 133 to the outside, and a detergent box assembly 114 for storing detergent to be put into the dish.

The sump 140 includes a body 141 in which the washing water is stored, and a cover 142 disposed on the body 141 and fastened to the body 141. On the other hand, the turbidity sensor 160 is disposed on one side of the body portion 141 to measure the turbidity of the wash water stored in the body portion 141 is fastened.

When the washing apparatus 100 operates, washing water is introduced from the outside. The introduced washing water is stored in the sump 140 and mixed with the detergent. The washing water mixed with the detergent is sprayed on the dishes to perform the washing. When the washing is performed, suspended matter adsorbed on the dishes flows to the lower side of the washing tank 133 together with the washing water. The floats are mixed with the wash water and stored back into the sump 140. The wash water stored in the sump 140 allows the floats to continue to flow. At this time, the turbidity sensor 160 measures the turbidity value of the wash water and transmits it to the controller 170. The controller 170 determines the degree of contamination of the wash water based on the transmitted turbidity value. However, if the suspended solids in the wash water continues to turbidity value measured by the turbidity sensor 160 is an error occurs. That is, if the suspended solids continue to flow in the wash water, it will flow to the measurement portion of the turbidity sensor 160 so that the turbidity value measured by the turbidity sensor 160 is not accurately measured. In addition, when the suspended solids flow, the turbidity value actually measured is continuously changed, so that the variation of each turbidity value is increased. On the other hand, the control unit 170 controls the cleaning device 100 based on the pollution degree. That is, the controller 170 controls to further introduce the washing water from the outside or the detergent into the washing water based on the pollution degree.

Looking at the control of the control unit 170, the control unit 170 determines whether the operation of the washing device 100 is started. The controller 170 controls the turbidity sensor 160 to measure the turbidity value while the dishes are being washed. Meanwhile, the controller 170 stops the operation of the pump 150 and determines the turbidity value based on the turbidity average value obtained by averaging the turbidity values measured by repeating the turbidity of the washing water multiple times in the turbidity sensor 160 for a predetermined time. . That is, the controller 170 stops the operation of the pump 170 in the turbidity sensor 160 and receives a plurality of measured turbidity values measured for a predetermined time and transmitted. In addition, the controller 170 measures an average of the turbidity values based on the turbidity values received a plurality of times. At this time, the control unit 170 may calculate the turbidity average value by averaging the rest except for the maximum and minimum values among the plurality of turbidity values. The controller 170 determines the degree of contamination of the wash water based on the turbidity average value. Based on the determined pollution degree, the controller 170 controls the operation of the washing device 100. In addition, the controller 170 may measure the turbidity average value a plurality of times and determine the contamination degree based on the average of the measured turbidity average values plural times. That is, the controller 170 measures the first turbidity average value as described above. In addition, the controller 170 measures the second turbidity average value as described above. The controller 170 calculates an average by measuring the first turbidity average value and the second turbidity average value. The controller 170 determines the degree of contamination of the wash water based on the averaged value. Therefore, the washing machine 100 can achieve the correct operation of the washing machine 100 based on the degree of contamination determined and determined a plurality of times. In addition, the washing apparatus 100 may secure the user's reliability through accurate operation.

Meanwhile, the controller 170 stops the operation of the pump 150 for the first predetermined time in the turbidity sensor 160, measures the first turbidity average value, and when the first predetermined time is over, the pump (for the second predetermined time) 150 may be deactivated and the second turbidity average value may be measured. That is, the controller 170 stops the operation of the pump 150 and measures the first turbidity average value in the turbidity sensor 160 for the first predetermined time. The first turbidity average value is measured by averaging the turbidity value a plurality of times during the first predetermined time in the turbidity sensor 160 as described above. In addition, the controller 170 stops the operation of the pump 160 for the first predetermined time, thereby preventing the floats from flowing in the washing water to achieve accurate measurement. On the other hand, when the measurement of the first turbidity average value is completed, the controller 170 stops the pump 150 for a second predetermined time different from the first predetermined time. In addition, the controller 170 controls the turbidity sensor 160 to measure the second turbidity average value for the second predetermined time. The second turbidity average value is measured by stopping the operation of the pump 150 for the second predetermined time as described above to prevent the floats from flowing the wash water. When the measurement of the first turbidity average value and the second turbidity average value is completed, the controller 170 determines the contamination level of the wash water by averaging the first turbidity average value and the second turbidity average value. Therefore, it is possible to increase the accuracy by measuring the degree of contamination of the wash water as described above, and can reconsider the reliability of the user's product.

In addition, the control unit 170 may stop the operation of the pump for a third predetermined time between the first predetermined time and the second predetermined time and control not to measure the turbidity of the wash water by the turbidity sensor 160. That is, the controller 170 controls the turbidity sensor 160 to measure the first turbidity average value during the first predetermined time period. When the measurement of the first turbidity average value is finished in the turbidity sensor 160, the controller 170 may not measure the turbidity of the wash water in the turbidity sensor 160 for the third predetermined time while the pump 150 is stopped. To control. When the third predetermined time elapses, the controller 170 controls the turbidity sensor 160 to measure the second turbidity average value for the second predetermined time. Meanwhile, the degree of contamination may be determined by stopping the operation of the pump 150 for the third predetermined time and measuring the accurate turbidity through the stabilization of the suspended matter in the washing water. In addition, it is possible to reduce the erroneous detection of the turbidity sensor 160 generated by the floats flowing in the wash water. Therefore, it is possible to provide the user with reliability of the product.

1 is a perspective view showing an embodiment of a washing machine according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a block diagram showing the control flow of the washing machine shown in FIG.

100: washing machine 140: sump

110: cabinet 141: body part

111: cabinet body 142: cover

112: door 150: pump

121: shelf 160: turbidity sensor

133: washing tank 170: control unit

Claims

Tub,

A pump for supplying washing water to the tub,

A sump formed in the tub and storing the washing water;

A turbidity sensor disposed on the sump and measuring turbidity of the washing water;

And a controller configured to stop the operation of the pump and determine the contamination level of the washing water based on the turbidity average value obtained by averaging the turbidity values measured by repeating the turbidity of the washing water multiple times by the turbidity sensor for a predetermined time.

The method according to claim 1,

The control unit measures the turbidity average value a plurality of times, and the turbidity average value measured a plurality of times to determine the contamination degree.

The method according to claim 1,

The control unit stops the operation of the pump for a first predetermined time in the turbidity sensor and measures the first turbidity average value,

And when the first predetermined time is over, controlling to stop the operation of the pump for a second predetermined time and to measure a second turbidity average value.

The method according to claim 3,

And the control unit stops the operation of the pump for a third predetermined time between the first predetermined time and the second predetermined time and controls not to measure the turbidity of the washing water by the turbidity sensor.