KR20000004438A - Water-level detecting method of washing machine - Google Patents

Water-level detecting method of washing machine Download PDF

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Publication number
KR20000004438A
KR20000004438A KR1019980025874A KR19980025874A KR20000004438A KR 20000004438 A KR20000004438 A KR 20000004438A KR 1019980025874 A KR1019980025874 A KR 1019980025874A KR 19980025874 A KR19980025874 A KR 19980025874A KR 20000004438 A KR20000004438 A KR 20000004438A
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South Korea
Prior art keywords
current value
water
water level
washing
washing machine
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KR1019980025874A
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Korean (ko)
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이제열
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전주범
대우전자 주식회사
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Priority to KR1019980025874A priority Critical patent/KR20000004438A/en
Publication of KR20000004438A publication Critical patent/KR20000004438A/en

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

PURPOSE: A water-level detecting method of a washing machine is provided to more accurately detect the washing water level to supply the appropriate amount of washing water according to the laundry amount while washing. CONSTITUTION: A water-level detecting method has the steps of: setting the water level if the driving start switch is turned on with the state of the washing machine is turned on; supplying water with the supplying valve opened if the water level is established; judging if the load electric current value(A) is more than the standard electric current value(Ak) of the established water level by comparing the load electric current value(A) to the standard electric current value table of each water level established in a memory unit; continuously supplying water if the load electric current value(A) of the present motor is less than the standard electric current value(Ak) of the established water level, and if more, washing.

Description

세탁기의 수위감지방법How to detect the water level of the washing machine

본 발명은 세탁수의 급수시 세탁량에 따라 적정한 세탁수를 정확하게 급수하기 위한 세탁기의 수위감지방법에 관한 것으로서, 특히 세탁기의 파워가 온 된 후 초기에 로드센싱용 탈수를 실시하여 수위가 설정되면 급수가 시작되는데 이때 세탁조를 임의 초간 회전시키면서 모터의 부하전류값을 측정하여 현재 설정수위에 해당되는 기준전류값(AK)에 도달하면 현재 수위가 설정수위에 도달했다고 판단하고 자동적으로 세탁행정을 시작하도록 한 것이다.The present invention relates to a water level detection method of a washing machine for accurately supplying the appropriate washing water according to the washing amount when water supply of the washing water, and in particular, when the water level is set by dehydration for load sensing at the initial stage after the washing machine is turned on At this time, the load current value of the motor is measured while rotating the washing tank for a few seconds, and when the reference current value (A K ) corresponding to the current setting level is reached, it is determined that the current water level has reached the setting level, and the washing operation starts automatically. I did it.

일반적으로, 세탁기의 수위를 감지할 때는 주로 압력식 수위센서를 이용하여 감지하게 되는데 이때, 감지방법은 수관을 통해서 유입되는 물에 의한 공기압으로 코아를 움직여 집적회로화 되어있는 발진기의 코일 인덕턴스값을 가지고 감지하도록 되어 있었다.In general, when detecting the water level of the washing machine is mainly detected by using a pressure-type water level sensor, the detection method is to move the core to the air pressure by the water flowing through the water pipe to move the coil inductance value of the oscillator which is integrated circuit. It was supposed to be sensed.

즉, 종래에는 도 1의 흐름도와 같이 사용자가 세탁기의 파워를 온 시킨 상태에서(스텝10) 운전시작스위치를 온 시키면(스텝11) 로드센싱이 시작되고 이에 따라 수위가 설정된다(스텝12).That is, conventionally, when the user turns on the operation start switch (step 11) while the user turns on the washing machine (step 11) as shown in the flowchart of FIG. 1, load sensing starts and the water level is set accordingly (step 12).

상기 단계에서 수위가 설정되면 급수밸브가 개방되어 급수가 이루어지는데 (스텝13) 이와같이 급수가 됨에 따라 수위센서가 수압을 감지하여 현재의 수압데이터를 세탁기 마이컴에 입력시키면 마이컴은 현재 수위가 설정수위에 도달되었는지를 판단한 후(스텝14) 설정수위에 도달되면 급수밸브를 닫고 곧바로 세탁행정으로 들어가고(스텝15) 아니면 계속해서 급수를 하게 된다.When the water level is set in the above stage, the water supply valve is opened to supply water. (Step 13) As the water supply is made, the water level sensor detects the water pressure and inputs the current water pressure data to the washing machine microcomputer. After the determination is made (step 14), when the set water level is reached, the water supply valve is closed and immediately enters the washing stroke (step 15), or water is continuously supplied.

그러나, 상기와 같은 압력식 수위센서는 간혹 회로소자의 불량이나 외부적인 충격으로 인하여 파괴되는 경우가 있었으며 수위센서가 파괴되었을 경우, 수위감지가 전혀 불가능할 뿐만 아니라, 세탁기가 동작하지 않게 되는 문제점을 가지고 있었다.However, the pressure level sensor as described above is sometimes damaged due to defective circuit elements or external shocks, and when the level sensor is destroyed, the level sensor is not possible at all and the washing machine does not operate. there was.

본 발명의 목적은 세탁시 세탁량에 따라 적정한 세탁수를 급수하기 위하여 세탁수위를 보다 정확히 감지할 수 있도록 한 세탁기의 수위감지방법을 제공하는데 있다.An object of the present invention is to provide a water level detection method of the washing machine to more accurately detect the washing water level in order to supply the appropriate washing water according to the amount of washing during washing.

도 1은 종래의 수위감지방법을 나타내는 흐름도,1 is a flow chart showing a conventional water level detection method,

도 2는 본 발명을 구현시키기 위한 제어블럭도,2 is a control block diagram for implementing the present invention,

도 3는 본 발명을 나타내는 흐름도이다.3 is a flowchart illustrating the present invention.

** 도면의 주요 부분에 대한 부호 설명 **** Explanation of symbols on the main parts of the drawing **

20: 운전시작 스위치 21: 모터 구동부20: operation start switch 21: motor drive unit

22: 급수밸브개폐부 23: 모터전류감지부22: water supply valve opening and closing 23: motor current detection unit

24: 메모리부 25: 마이컴24: memory 25: microcomputer

본 발명은 특히 상기예의 목적을 구현할 수 있도록 세탁기가 파워 온 된 상태에서 운전시작 스위치의 온 입력이 들어오면 건포상태에서 임의 초 동안 로드센싱용 탈수를 실시하여 수위를 설정하는 단계와, 상기 단계에서 수위가 설정되면 급수밸브를 오픈시켜 급수하는 단계와, 상기 단계에서 급수가 시작되면 일정주기로 모터의 부하전류를 측정하여 급수처리를 제어하는 단계를 마이컴이 순차적으로 처리하는 방법으로 이루어져 있다.The present invention particularly provides a step of setting the water level by dehydrating the load sensing for a certain second in a dry state when the on input of the operation start switch comes in while the washing machine is powered on so that the above object can be realized. When the water level is set, the water supply valve is opened to supply water, and when the water supply starts at this step, the microcomputer sequentially processes the step of controlling the water supply process by measuring the load current of the motor at a predetermined cycle.

또한, 상기 급수처리 제어단계는 세탁조 회동시 모터의 부하전류값(A)을 임의 초간 계속적으로 측정한 후 측정된 부하전류값(A)을 메모리부에 기설정된 수위별 기준전류값 테이블에 대비시켜 현재 모터의 부하전류값(A)이 설정수위의 기준전류값(AK) 이상이 되는지를 판단하는 단계와, 상기 단계에서 현재 모터의 부하전류값(A)이 설정수위의 기준전류값(AK) 미만이 되면 계속해서 급수시키고 그 이상이 되면 세탁행정을 수행하는 단계로 이루어져 있다.In addition, the water supply control step is to continuously measure the load current value (A) of the motor during the rotation of the washing tank for a certain second, and then compare the measured load current value (A) with the reference level table for each level set in the memory unit Judging whether the load current value A of the current motor is equal to or higher than the reference current value A K of the setting level, and in this step, the load current value A of the current motor is the reference current value A of the setting level. K ) If the water level is less than the water and continue to wash the washing process.

이하에서 이를 첨부된 도면과 함께 좀 더 상세히 설명하므로써 본 발명의 보다 구체적인 특징들이 이해될 수 있을 것이다.Hereinafter, more specific features of the present invention will be understood by describing the same in detail with the accompanying drawings.

도 2는 본 발명과 관련된 시스템 제어블럭도로서, 각 구성을 살펴보면 다음과 같다.2 is a system control block diagram related to the present invention.

사용자가 세탁기의 파워를 온 시킨 상태에서 운전시작스위치(20)를 온 시키면 초기에 로드센싱을 수행하는 모터 구동부(21)와, 상기 모터 구동부(21)의 로드센싱 결과 수위가 설정되면 급수를 수행하는 급수밸브개폐부(22)와, 초기에 세탁모터 구동시 모터의 부하전류를 감지하는 모터전류감지부(23)와, 설정수위에 상응하는 세탁모터의 기준전류값이 테이블로 저장되어있는 메모리부(24)와, 급수시 상기 모터 구동부(21)를 임의 초 동안 회전시켜 상기 모터전류감지부(23)로부터 소정의 모터 부하전류값이 입력되면 상기 메모리부(24)의 설정수위별 기준전류값 테이블에 대비하여 현재의 모터 부하전류값(A)이 현재 설정수위에 해당되는 기준전류값(AK) 이상이 되는지를 판단하는 마이컴(25) 등으로 이루어져 있다.When the user turns on the operation start switch 20 while the power of the washing machine is turned on, the motor driver 21 performs load sensing at the initial stage, and the water supply is performed when the water level is set as a result of the load sensing of the motor driver 21. The water supply valve opening and closing portion 22, the motor current detection unit 23 for initially detecting the load current of the motor when the washing motor is driven, and the memory unit storing the reference current values of the washing motor corresponding to the set water level in a table. (24) and when the motor drive unit 21 is rotated for a certain second when water is supplied, and a predetermined motor load current value is input from the motor current sensing unit 23, the reference current value for each set level of the memory unit 24 is set. In contrast to the table, the microcomputer 25 determines whether the current motor load current value A is equal to or greater than the reference current value A K corresponding to the current setting level.

도 3은 본 발명에 의한 세탁기 수위감지방법의 일실시예를 나타내는 흐름도이다.3 is a flowchart illustrating an embodiment of a washing machine water level detection method according to the present invention.

먼저, 세탁기가 파워 온 된 상태에서(스텝30) 사용자가 순차적으로 운전시작 스위치(20)를 온 시키면(스텝31) 세탁기의 마이콤(25)은 이를 입력받은 후 모터구동부(21)에 제어신호를 보내 건포상태에서 약 30초동안 모터를 좌우로 회전시키는 로드센싱을 실시하게 된다.First, when the washing machine is powered on (step 30) and the user sequentially turns on the operation start switch 20 (step 31), the microcomputer 25 of the washing machine receives the control signal and then sends a control signal to the motor driving unit 21. The load sensing is performed by rotating the motor from side to side for about 30 seconds in a dry state.

로드센싱이 끝나게 되면 이에 따라 적정수위가 설정되며(스텝32) 적정수위가 설정되면 마이컴(25)은 급수밸브를 오픈시켜 세탁조에 급수를 하게 된다(스텝33).When the load sensing is finished, the proper water level is set accordingly (step 32). When the proper water level is set, the microcomputer 25 opens the water supply valve to supply water to the washing tank (step 33).

이때, 상기 마이컴(25)은 모터 구동부(21)에 제어신호를 보내 모터를 임의 초동안 회전시키게 되는데 이순간 모터전류감지부(23)는 모터의 부하전류값을 계속적으로 임의 초동안 감지하여 마이컴(25)에 입력시키게 된다.At this time, the microcomputer 25 sends a control signal to the motor driving unit 21 to rotate the motor for a certain second. At this moment, the motor current detecting unit 23 continuously detects the load current value of the motor for a predetermined second and the microcomputer ( 25).

상기 모터전류감지부(23)로부터 모터의 부하전류값을 계속적으로 임의 초동안 인가받은 마이컴(25)은 현재 인가된 모터 부하전류값(A)이 설정수위에 해당되는 기준전류값(AK) 이상이 되는지를 판단하게 된다(스텝34).The microcomputer 25 continuously receiving the load current value of the motor from the motor current detection unit 23 for a certain second has a reference current value A K at which the currently applied motor load current value A corresponds to a set level. It is judged whether or not it is abnormal (step 34).

이때, 메모리부(24)에는 "소,저,중,고" 의 설정수위에 상응하는 세탁모터의 기준전류값이 테이블로 저장되어있어 상기 마이컴(25)이 이러한 데이터 테이블을 통해 현재의 부하정도를 판단하게 된다.At this time, the memory unit 24 stores the reference current value of the washing motor corresponding to the set level of "small, low, medium, high" as a table, so that the microcomputer 25 loads the current load through the data table. Will be judged.

따라서, 상기의 판단결과, 현재 인가된 모터의 부하전류값(A)이 현재 설정수위에 해당되는 기준전류값(AK) 이상이 되었다고 판단되면 마이컴(25)은 세탁행정을 수행하게 된다(스텝35).Therefore, when it is determined that the load current value A of the currently applied motor is equal to or higher than the reference current value A K corresponding to the current set water level, the microcomputer 25 performs the washing process (step). 35).

즉, 현재 모터의 부하전류값(A)가 현재 설정수위에 해당되는 기준전류값(AK) 이상이 되었을 때는 적정 수위까지 급수된 것으로 판단하게 되는 것이다.That is, when the load current value (A) of the current motor is more than the reference current value (A K ) corresponding to the current set water level, it is determined that the water is supplied to the proper water level.

한편, 인가된 모터의 부하전류값(A)이 현재 설정수위에 해당되는 기준전류값(AK) 미만이라고 판단되면 마이컴(25)은 급수밸브를 계속해서 오픈시켜 급수를 수행하게 된다.On the other hand, if it is determined that the load current value A of the applied motor is less than the reference current value A K corresponding to the current set water level, the microcomputer 25 continuously opens the water supply valve to perform water supply.

위와같이 본 발명에 의한 세탁기의 수위감지방법은 사용자에 의해 세탁기의 파워가 온 된 후 초기에 로드센싱용 탈수를 실시하여 수위가 설정되면 급수가 시작되는데 이때 세탁조를 임의 초간 회전시키면서 모터의 부하전류값을 측정하여 현재 설정수위에 해당되는 기준전류값(AK)에 도달하면 세탁기 마이컴이 현재의 수위가 설정수위에 도달했다고 판단하여 자동적으로 세탁을 시작함으로써 세탁수위를 좀 더 정확하게 결정할 수 있는 유용성을 제공한다.The water level detection method of the washing machine according to the present invention as described above, after the power of the washing machine is turned on by the user, the water is started when the water level is set by performing dehydration for the load sensing at the initial stage. When measuring the value and reaching the reference current value (A K ) corresponding to the current set water level, the washing machine microcomputer determines that the current water level has reached the set water level and starts washing automatically. To provide.

Claims (1)

세탁기가 파워 온 된 상태에서 운전시작 스위치의 온 입력이 들어오면 건포상태에서 임의 초 동안 로드센싱용 탈수를 실시하여 수위를 설정하는 단계(스텝30,31,32)와, 상기 단계에서 수위가 설정되면 급수밸브를 오픈시켜 급수하는 단계(스텝33)와, 세탁조 회동시 모터의 부하전류값(A)을 임의 초간 계속적으로 측정한 후 측정된 부하전류값(A)을 메모리부에 기설정된 수위별 기준전류값 테이블에 대비시켜 현재 모터의 부하전류값(A)이 설정수위의 기준전류값(AK) 이상이 되는지를 판단하는 단계(스텝34)와, 상기 단계에서 현재 모터의 부하전류값(A)이 설정수위의 기준전류값(AK) 미만이 되면 계속해서 급수시키고 그 이상이 되면 세탁행정을 수행하는 단계(스텝35)를 세탁기 마이컴(25)이 순차적으로 수행하는 것을 특징으로 하는 세탁기의 수위감지방법.When the washing machine is powered on and the ON input of the operation start switch comes in, dehydrating the load sensing for a certain number of seconds in a dry state to set the water level (steps 30, 31, 32), and the water level is set in the above step. When the water supply valve is opened to supply water (step 33), the load current value (A) of the motor is continuously measured for a few seconds at the time of rotation of the washing tub, and the measured load current value (A) for each preset level Judging whether the load current value A of the current motor is equal to or higher than the reference current value A K of the set water level by comparing the reference current value table (step 34), and the load current value ( Washing machine characterized in that the washing machine microcomputer 25 sequentially performs the step (step 35) to perform the water supply (step 35) if the A) is less than the reference current value (A K ) of the set water level Level detection method.
KR1019980025874A 1998-06-30 1998-06-30 Water-level detecting method of washing machine KR20000004438A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114369924A (en) * 2021-12-07 2022-04-19 珠海格力电器股份有限公司 Washing machine water level detection method and washing machine
US11952706B2 (en) 2021-11-03 2024-04-09 Haier Us Appliance Solutions, Inc. Washing machine appliance and method for flood protection operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11952706B2 (en) 2021-11-03 2024-04-09 Haier Us Appliance Solutions, Inc. Washing machine appliance and method for flood protection operation
CN114369924A (en) * 2021-12-07 2022-04-19 珠海格力电器股份有限公司 Washing machine water level detection method and washing machine

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