KR970002318B1 - A washing machine water level sensor - Google Patents

A washing machine water level sensor Download PDF

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Publication number
KR970002318B1
KR970002318B1 KR1019920004678A KR920004678A KR970002318B1 KR 970002318 B1 KR970002318 B1 KR 970002318B1 KR 1019920004678 A KR1019920004678 A KR 1019920004678A KR 920004678 A KR920004678 A KR 920004678A KR 970002318 B1 KR970002318 B1 KR 970002318B1
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KR
South Korea
Prior art keywords
water level
level sensor
water
washing machine
water supply
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KR1019920004678A
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Korean (ko)
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KR930019905A (en
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정만구
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대우전자 주식회사
배순훈
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Priority to KR1019920004678A priority Critical patent/KR970002318B1/en
Publication of KR930019905A publication Critical patent/KR930019905A/en
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Publication of KR970002318B1 publication Critical patent/KR970002318B1/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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/187—Machine fault alarms
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

Turns on a washer(1), an automatic washing function selects the high water level to proportionally with the quantities of laundry. A controller(20) outputs a low signal from the output port(PO1), and opens up a water supply valve and starts water supply. At this time, the controller(20) reads an oscillating frequency which is inputted from a water level sensor(21) and decides the oscillating frequency to meet the established high water level. Thus the value corresponding to the high water level is inputted, the controller stops the water supply and performs normal washing. But if the frequency of the high water level is not inputted and the frequency stays below the water level without change, this indicates the trouble in the water level sensor(21).

Description

세탁기 수위감지 센서의 고장 검출방법Failure Detection Method of Washing Machine Water Level Sensor

제1도는 세탁기의 구성을 나타내는 개략도.1 is a schematic view showing the configuration of a washing machine.

제2도는 본 발명에 따른 회로도.2 is a circuit diagram according to the present invention.

제3도는 본 발명에 의한 흐름도.3 is a flow chart according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 세탁기 2 : 급수관1: washing machine 2: water pipe

3, V : 급수밸브 20 : 제어수단3, V: water supply valve 20: control means

7, 21 : 수위감지수단 22 : 급수밸브 구동수단7, 21: water level detection means 22: water supply valve drive means

23 : 부저구동수단 24 : 스위치 입력수단23: buzzer driving means 24: switch input means

24 : 표시수단24: display means

본 발명은 일조식 전자동 세탁기에 채용된 압력방식의 수위감지센서의 고장검출에 관한 것으로, 특히 수위센서의 고장 및 불량으로 수위센서의 감지레벨이 지정수위보다 높아진 경우 세탁조의 고수위에서는 수위센서가 고수위를 감지하기 전에 물이 외측 탱크밖으로 넘쳐 흐르게 되는 오우버 플로우(OVER FLOW)현상이 일어나게 되고 이에 따라 세제 및 물의 낭비를 초래하였던 바, 이를 미연에 방지할 수 있도록 한 세탁기 수위 감지센서의 고장 검출 방법에 관한 것이다. 일반적인 압력방식의 수위감지센서를 채용한 세탁기를 제1도를 통해서 살펴보면, 세탁기(1)의 상부에 취부된 급수관(2) 및 급수밸브(3)를 통해 급수가 진행되어 외측탱크(5) 및 세탁조(6)내에 물이 채워짐에 따라 외측탱크(5)의 측면에 설치된 압력관(8)내의 기압이 가별되어 수위감지수단(7)에 전달된다. 이때, 공지의 발진회로로 구성된 수위감지수단(7)은 상기 가변되어 들어오는 가압으로 발진회로의 발진주파수의 변화를 초래하게 되고, 이 발진주파의 변화로 결국은 세탁조내의 수위(소, 저, 중, 고)를 감지하게 된다.The present invention relates to the failure detection of the pressure level water level sensor of the solar type automatic washing machine, especially when the detection level of the water level sensor is higher than the specified level due to the failure and failure of the water level sensor, Overflow occurred, which caused water to flow out of the outer tank before the high water level was detected, resulting in waste of detergent and water. It is about a method. Looking at the washing machine employing the water pressure sensor of the general pressure method through FIG. 1, the water supply proceeds through the water supply pipe (2) and the water supply valve (3) attached to the upper part of the washing machine (1) to the outer tank (5) and As the water in the washing tank 6 is filled, the air pressure in the pressure tube 8 installed on the side of the outer tank 5 is separated and transmitted to the water level detecting means 7. At this time, the water level detecting means 7 composed of a known oscillation circuit causes a change in the oscillation frequency of the oscillation circuit due to the variable incoming pressure, and finally, the water level (small, low, medium) in the washing tank is changed due to the change of the oscillation frequency. , High).

그러나, 이와같은 수위센서가 기능저하 및 고장을 일으켜 수위에 따른 감지레벨이 지정된 수위보다 높아진 경우 세탁조(6)의 수위가 고수위로 선택되었을 때, 수위감지수단(7)이 고수위를 감지하는 발진주파수를 발생하기전에 세탁조(6)내로 급수되고 있는 물은 외측탱크(5)의 익수구(9) 및 익수관(10)을 통해 배수관(11)을 거쳐 세탁기(1) 외부로 배출되는 이른바 오우버 플로우현상이 발생함과 동시에 계속해서 급수가 진행됨으로써 투입된 세제와 물을 낭비하는 결과를 초래한다.However, when such a water level sensor is deteriorated and malfunctions and the detection level according to the water level is higher than the designated water level, when the water level of the washing tank 6 is selected as the high water level, the oscillation frequency at which the water level sensing means 7 detects the high water level. Before being generated, the water being supplied into the washing tank 6 is discharged to the outside of the washing machine 1 through the draining pipe 11 and the draining pipe 10 of the outer tank 5 through the draining pipe 11. As the flow occurs, the water is continuously supplied, resulting in waste of detergent and water.

본 발명의 목적은 상기 문제점을 해결하기 위하여 안출된 것으로, 세탁량에 상응하도록 고수위가 선택되었을때 수위감지 센서로부터 고수위에 따른 발진주파수가 입력되지 않고 고수위 미만의 발진주파수에서 일정시간동안 주파수의 변화가 없음이 검출되면 주제어수단(마이크로 컴퓨터)은 이를 수위감지센서의 고장 및 불량으로 기인된 오우버 플로우현상이 발생하고 있음을 인식하여 급수를 중단하고 에러신호를 외부로 디스플레이 해주고 경보를 울려줌으로써 세제 및 물의 낭비를 방지할 수 있도록 한 세탁기 수위감지센서의 고장 검출 방법을 제공하는 것에 있다.An object of the present invention is to solve the above problems, when the high water level is selected to correspond to the washing amount, the oscillation frequency according to the high water level is not input from the water level sensor, the frequency change for a certain time at the oscillation frequency below the high water level If none is detected, the main control means (microcomputer) recognizes that the overflow phenomenon caused by the failure and failure of the water level sensor occurs, stops the water supply, displays the error signal to the outside, and sounds an alarm. It is an object of the present invention to provide a failure detection method of a washing machine water level sensor which can prevent waste of water.

이하, 첨부된 도면에 의거하여 본 발명을 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

제1도는 압력수위센서를 채용한 일반적인 세탁기(1)의 개략 단면도를 나타낸 것으로, 외부 케이스(4)내에는 달아매는 구성으로 외측 탱크(5)가 취부되고, 세탁하기 위한 물을 저장하는 상기 외측탱크(5) 내에는 세탁조(6)를 자유롭게 회전되게 설치한다. 또한, 상기 외측탱크(5)에는 오우버 플로우 헹굼을 위한 익수구(9)와 외측탱크(4)내의 물의 압력을 검지하기 위한 압력관(8)의 입구와 배수관(11)의 입구와 마련되어 있고, 상기 익수구(9)은 익수관(10)을 통해 배수관(11)과 연결되고, 상기 압력관(8)은 수위감지수단(7)과 접속되어 외측탱크(5)의 수위(소, 저, 중 고수위)에 따라 외측탱크(5)의 측면에 연결된 압력관(8)의 압력을 가변시키고 이 가변되는 압력신호를 수위감지수단(7)에 입력하는 것이다. 이와 같은 수위감지수단(7)을 좀 더 상세히 알아보기 위하여 제2도의 회로도를 참조하여 설명하면, 본 발명의 구동프로그램이 내장되어 각종 입력신호를 토대로 각종 출력을 제어하는 원칩 마이크로 컴퓨터인 제어수단(20)은 그 입력포트(PI1)에 저항(R1~P5), 콘덴서(C1)(C2), 인버터(I1)(I2), 코일(L) 및 트랜지스터(Q1)로 구성된 수위감지수단(21)이 접속되어 전술한 세탁조(6)의 수위에 따라 압력관(8)의 기압이 가변되어 이 기압의 강약으로 미도시된 코어를 동작시킴으로서 코일(L)의 인덕턴스가 변하게 되어 그 변화된 인덕턴스 값과 콘덴서(C1)(C2)의 값에 의해 고유의 IC발전을 수행하게 되는 바, 인버터(I2)를 통해 출력되는 발진 구형파는 저항(R3)을 통해 트랜지스터(Q1)를 단속적으로 턴온시키며 저항(R4)을 통해 일정한 값의 발진 구형파가 제어수단(20)의 입력포트(PI1)로 입력되어 제어수단(20)은 이 입력발진 주파수를 통해 현재의 수위를 판단하게 된다. 또한 제어수단(20)의 출력포트(PO1)에는 트라이악(TC), 급수밸브(V), 트랜지스터(Q2), 저항(R6)(R11) 및 전원(Vcc)(AC)으로 구성된 급수밸브 구동수단(22)이 접속되어 급수밸브(V)를 개방하여 급수를 개시하기 위하여 제어수단(20)이 출력포트(PO1)로 로우레벨 신호를 출력하면 저항(R6)을 통해 트랜지스터(Q2)가 턴온되고, 동시에 트라이악(TC)의 게이트에 트리거 신호가 인가됨과 동시에 트라이악(TC)이 도통되어 급수밸브(V)에 전원(AC)(Vcc)이 인가됨으로써 급수밸브(V)는 개방된다.1 shows a schematic cross-sectional view of a general washing machine 1 employing a pressure level sensor, in which the outer tank 5 is mounted in a fastening configuration in the outer case 4 and stores the water for washing. In the tank 5, the washing tank 6 is installed to rotate freely. In addition, the outer tank 5 is provided with an inlet of the water inlet 9 for the overflow rinse and an inlet of the pressure pipe 8 for detecting the pressure of water in the outer tank 4 and an inlet of the drain pipe 11. The water mouth (9) is connected to the drain pipe 11 through the water pipe (10), the pressure pipe (8) is connected to the water level sensing means (7) to the water level (small, low, medium) of the outer tank (5) High water level) is to change the pressure of the pressure pipe (8) connected to the side of the outer tank (5) and input the variable pressure signal to the water level detecting means (7). Referring to the circuit diagram of FIG. 2 to describe the water level detecting means 7 in more detail, a control means which is a one-chip microcomputer incorporating a driving program of the present invention and controlling various outputs based on various input signals ( 20) has a resistor (R 1 to P 5 ), a capacitor (C 1 ) (C 2 ), an inverter (I 1 ) (I 2 ), a coil (L) and a transistor (Q 1 ) at its input port (PI 1 ). The water level detecting means 21 configured to be connected to the air pressure of the pressure tube 8 is variable according to the water level of the washing tank 6 described above, so that the inductance of the coil L is changed by operating a core not shown by the strength of this air pressure. The unique inductance is generated by the changed inductance value and the value of the capacitor (C 1 ) (C 2 ). The oscillating square wave output through the inverter (I 2) is converted to the transistor (Q) through the resistor (R 3 ). 1) the sikimyeo intermittently turned on by resistor (R 4) is controlled oscillation square wave of constant value over the Is input to the input port (PI 1), the control means 20 of the stage 20 is to determine the current level through the input oscillation frequency. In addition, the output port PO 1 of the control means 20 includes a triac TC, a water supply valve V, a transistor Q 2 , a resistor R 6 , R 11 , and a power supply Vcc (AC). When the configured water supply valve driving means 22 is connected and the control means 20 outputs a low level signal to the output port PO 1 to open the water supply valve V to start water supply, the resistance R 6 is transmitted through the resistor R 6 . The transistor Q 2 is turned on, the trigger signal is applied to the gate of the triac TC at the same time, the triac TC is conducted, and the power supply AC Vcc is applied to the water supply valve V, thereby supplying the water supply valve. (V) is open.

또한, 제어수단(20)의 출력포트(PO2)에는 저항(R7~R10), 부저(B), 트랜지스터(Q3)(Q4)로 구성된 부저 구동수단(23)이 접속되어 상기 수위감지수단(21)의 고장이 검출되면 제어수단(20)은 출력포트(PO2)로 로우신호를 출력하여 트랜지스터(Q4)를 턴 오프시키고, 동시에 트랜지스터(Q3)가 턴 온되어 전원(Vcc)이 부저(B)에 인가되어 부저(B)는 구동된다. 또한 제어수단(20)은 수위감지수단(21)의 고장시에 출력포트군(POn)을 통해 일정신호를 출력하여 표시수단(25)으로 수위감지수단(21)의 고장에 따른 에러신호를 디스플레이 해준다. 또한 제어수단(20)의 입력포트군(PIn)에는 미도시된 전원스위치, 운전시작스위치 등으로 구성된 스위치 입력수단(24)이 접속되어 각종 명령을 키 입력하여 준다.In addition, the output port PO 2 of the control means 20 is connected to the buzzer driving means 23 composed of the resistors R 7 to R 10 , the buzzer B, and the transistors Q 3 and Q 4 . When a failure of the water level detecting means 21 is detected, the control means 20 outputs a low signal to the output port PO 2 to turn off the transistor Q 4 , and at the same time, the transistor Q 3 is turned on to supply power. Vcc is applied to the buzzer B so that the buzzer B is driven. In addition, the control means 20 outputs a predetermined signal through the output port group POn when the water level detecting means 21 fails, and displays the error signal according to the failure of the water level detecting means 21 by the display means 25. Do it. In addition, a switch input means 24 composed of a power switch, an operation start switch, and the like, is connected to the input port group PIN of the control means 20 to input various commands.

상기와 같이 구성시켜서 된 본 발명의 작용 및 효과를 제3도의 흐름도를 참조하여 설명한다.The operation and effects of the present invention constructed as described above will be described with reference to the flowchart of FIG.

먼저, 세탁기(1)에 전원을 인가하고, 인위적으로 고수위가 선택되었거나, 그밖의 세탁기의 자동세탁기능의 하나로 세탁량에 비례하도록 고수위가 선택되었다면, 제어수단(20)은 출력포트(PO1)로 로우 신호를 출력하여 급수밸브(V)를 개방시켜 급수를 개시한다. 이때 제어수단(20)은 수위감지수단(21)으로부터 입력되는 발진주파수의 값을 읽게 되며, 이 발진주파수가 설정된 고수위값에 상응하는가를 판별하여 고수위에 따른 값이 입력되면 급수를 중단하고 정상적인 세탁운전을 수행한다. 그러나 고수위에 따른 주파수가 입력되지 않고, 고수위 미만의 어떤 일정한 주파수에서 그 값이 변하지 않는다면 이것을 수위감지수단(21)의 고장으로 기인된 오우버플로우 현상이 발생하고 있음을 인식하여 출력포트(PO2)로 로우신호를 출력하여 부저(B)를 구동시키며 출력포트군(POn)으로 제어된 신호를 출력하여 에러신호를 디스플레이 해줌과 동시에 출력포트(PO1)로 로우신호를 중지하여 급수밸브(V)를 폐쇄시킴으로써 급수를 중단하여 물의 낭비를 막는다.First, when power is supplied to the washing machine 1, and artificially high water level is selected, or if the high water level is selected to be proportional to the washing amount as one of the automatic washing function of the other washing machine, the control means 20 is output to the output port (PO 1 ) A low signal is output to open the water supply valve V to start water supply. At this time, the control means 20 reads the value of the oscillation frequency input from the water level detecting means 21, and determines whether the oscillation frequency corresponds to the set high water level value, and when the value according to the high water level is inputted, stops water supply and normal washing. Perform the operation. But not the frequency is input in accordance with on adherence, and if the value is changed at a certain frequency below the high-water mark is the OY overflow phenomenon due to a malfunction of the water level sensing means 21 generate it and that the recognized output port (PO 2 Outputs a low signal to drive the buzzer B, outputs a signal controlled by the output port group POn to display an error signal, and at the same time stops the low signal to the output port PO 1 to supply a water supply valve (V). ) To stop the water supply to prevent waste of water.

이상에서와 같이 본 발명은 수위감지센서의 고장유무를 검출함으로써 오우버 플로우 현상으로 발생되는 세제 및 물의 낭비를 줄일 수 있는 이점이 있다.As described above, the present invention has the advantage of reducing the waste of detergent and water generated by the overflow phenomenon by detecting the failure of the water level sensor.

Claims (1)

압력방식의 전자식 수위감지센서를 채용하고 마이크로 컴퓨터의 제어로 구동되는 일조식 전자동 세탁기에 있어서, 고수위 급수시 수위감지센서로부터 고수위에 따른 발진주파수가 입력되지 않고 고수위 미만의 발진주파수에서 일정시간 동안 주파수의 변화가 없을 때 수위감지센서의 불량을 인식하여 외부로 불량신호를 출력하는 제어수단(20)과, 상기 제어수단(20)의 불량신호 출력시 경보를 울려주고 불량코드 표시를 디스플레이 해주는 부저구동수단(23) 및 표시수단(25)으로 구성됨을 특징으로 하는 세탁기 수위감지센서의 고장 검출 방법.In the solar powered fully automatic washing machine adopting the pressure type electronic water level sensor and controlled by microcomputer control, the frequency for a certain time at the oscillation frequency below the high water level is not inputted from the water level sensor at the high water level. Control means 20 for recognizing the failure of the water level sensor and outputs a bad signal to the outside when there is no change of, and a buzzer drive to sound an alarm and display a display of a bad code when the bad signal output of the control means 20 Method for detecting a failure of the washing machine water level sensor, characterized in that consisting of a means (23) and the display means (25).
KR1019920004678A 1992-03-21 1992-03-21 A washing machine water level sensor KR970002318B1 (en)

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KR100335093B1 (en) * 1998-03-31 2002-06-20 구자홍 structure for preventing water level sensing error of washing machine
KR100479084B1 (en) * 2002-11-28 2005-03-28 엘지전자 주식회사 Error Detecting Method for Washing Machine
KR101065258B1 (en) * 2009-09-01 2011-09-19 우성전기공업 주식회사 Apparatus for guarding of pressure sensor mounting in washing machine
KR20140087369A (en) 2012-12-28 2014-07-09 현대자동차주식회사 Method and system of determining failure of urea level sensor

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