KR960014277B1 - Water level control device of a washing machine - Google Patents

Water level control device of a washing machine Download PDF

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Publication number
KR960014277B1
KR960014277B1 KR1019930028923A KR930028923A KR960014277B1 KR 960014277 B1 KR960014277 B1 KR 960014277B1 KR 1019930028923 A KR1019930028923 A KR 1019930028923A KR 930028923 A KR930028923 A KR 930028923A KR 960014277 B1 KR960014277 B1 KR 960014277B1
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KR
South Korea
Prior art keywords
water
washing
flow sensor
washing machine
water level
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KR1019930028923A
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Korean (ko)
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KR950018887A (en
Inventor
김재욱
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대우전자 주식회사
배순훈
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Priority to KR1019930028923A priority Critical patent/KR960014277B1/en
Publication of KR950018887A publication Critical patent/KR950018887A/en
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Publication of KR960014277B1 publication Critical patent/KR960014277B1/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

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

Abstract

The device senses the water flow rate to detect water level easily. The device consists of; a microprocessor(31); a flow meter(2) for detecting flow rate; and a pulse genrator(32) to generate pulses according to the flow rate and sending it to the microprocessor.

Description

유량센서를 이용한 세탁기의 수위 조절장치Water level controller of washing machine using flow sensor

제1도는 본 발명의 수위 조절장치가 구성된 세탁기의 구성을 보인 개략 단면도.1 is a schematic cross-sectional view showing the configuration of a washing machine configured with the water level adjusting apparatus of the present invention.

제2도는 본 발명의 수위 조절장치에 사용되는 유량센서를 발췌하여 보인 확대 단면도.Figure 2 is an enlarged cross-sectional view showing an extract of the flow sensor used in the level control device of the present invention.

제3도는 본 발명의 수위 조절장치의 제어회로도.3 is a control circuit diagram of the water level regulator of the present invention.

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

1 : 급수구 2 : 유량센서1: water inlet 2: flow sensor

22 : 코일 23 : 고정 슬리브22 coil 23 fixed sleeve

23A,25A : 통공 24 : 스프링23A, 25A: through hole 24: spring

25 : 가동 다이아프램25: movable diaphragm

본 발명은 세탁기에 있어서, 급수되는 세탁수의 유량을 검출하는 유량센서를 이용하여 수위를 정확하게 검출하는 유량센서를 이용한 세탁기의 수위 조절장치에 관한 것이다.The present invention relates to a washing machine level control apparatus using a flow sensor for accurately detecting the water level by using a flow sensor for detecting the flow rate of the wash water supplied to the washing machine.

종래에는 압력센서를 이용하여 세탁수의 수위에 따른 압력의 변화를 검출하고, 검출한 압력에 따른 소정의 데이타를 메모리에서 리드하여 세탁조의 세탁수 수위를 검출하였으나, 압력센서는 자체적으로 약간의 허용오차(약 15㎜정도의 수위)가 있으므로 급수되는 세탁수의 수위를 정확하게 판별할 수 없었으며, 이로 인하여 세탁조에 설정수위보다 세탁수가 많이 급수될 경우에는 필요없이 많은 물이 낭비되었고, 설정수위보다 적게 급수될 경우에는 세탁물이 손상되는 등의 문제점이 있었다.Conventionally, a pressure sensor is used to detect a change in pressure according to the level of washing water, and predetermined data according to the detected pressure is read from the memory to detect the washing water level in the washing tank. Since there was an error (about 15mm level), the level of the wash water supplied could not be accurately determined, and thus, when more wash water was supplied to the washing tank than the set water level, much water was wasted without needing to set the water level. If less water is supplied, there is a problem such as damage to the laundry.

본 발명은 상기와 같은 종래의 제반 문제점을 해결하기 위하여 창안한 것으로서, 세탁수의 급수구측에 세탁수의 유량에 따라 임피던스가 가변되는 유량센서를 설치하고, 그 유량센서의 임피던스의 변화에 따른 주파수의 변화로 세탁수의 수위를 정확히 조절하는 세탁기의 수위 조절장치를 제공하는 데 그 목적이 있는 것으로 이를 첨부된 도면을 참조하여 상세히 설명한다.The present invention has been made in order to solve the above-mentioned conventional problems, a flow sensor having an impedance variable according to the flow rate of the wash water is installed on the water supply port side of the wash water, the frequency according to the change of the impedance of the flow sensor The purpose of the present invention is to provide a water level control device for a washing machine to precisely control the level of the washing water with the change of this.

제1도는 본 발명의 수위 조절장치가 구성된 세탁기의 구성을 보인 개략 단면도로서 이에 도시된 바와 같이, 본 발명은 세탁수가 급수되는 급수구(1)에 유량센서를 설치하여 급수구(1)로 유입되는 세탁수가 유량센서(2)를 통해 세탁조(3)로 급수되게 하였다.1 is a schematic cross-sectional view showing a configuration of a washing machine configured with a water level adjusting apparatus of the present invention, as shown in the present invention, the present invention is installed in the water inlet 1 by installing a flow sensor in the water inlet 1 through which the wash water is supplied. Washing water to be supplied to the washing tank (3) through the flow sensor (2).

유량센서(2)는 제2도에 도시된 바와 같이, 본체(21)의 외측에 코일(22)을 설치하고, 본체(21)내에는 세탁수가 통과하는 통공(23A)을 구비한 조정용 슬리브(23)를 고정설치함과 아울러 고정 슬리브(23)와의 사이에 비자성 재질의 스프링(24)을 개재하여 통공(25A)을 구비한 가동 다이아프램(25)을 설치하여, 급수되는 세탁수의 유량에 따라 가동 다이아프램(25)이 전진 및 후진되면서 코일(22)의 인덕턱스가 가변되게 구성하였다.As shown in FIG. 2, the flow rate sensor 2 includes a coil 22 disposed outside the main body 21 and an adjustment sleeve having a through hole 23A through which washing water passes. 23 is fixedly installed, and a movable diaphragm 25 having a through hole 25A is provided between the fixing sleeve 23 and a non-magnetic spring 24 to supply the flow rate of the wash water to be supplied. As the movable diaphragm 25 moves forward and backward, the inductance of the coil 22 is configured to vary.

그리고 제3도는 본 발명의 수위 조절장치의 제어회로도로서 이에 도시된 바와같이, 세탁기의 동작을 제어하는 마이콤(31)과, 유량센서(2)의 검출유량에 따른 주파수로 발진하여 상기 마이콤(31)에 입력시키는 인버터(IV1,IV2), 코일(22), 저항(R1,R2) 및 콘덴서(C1,C2)로 된 발진부(32)와, 상기 마이콤(31)에 동작명령을 입력시키는 키입력부(33)와, 상기 마이콤(31)의 제어에 따라 세탁기의 동작상태를 표시하는 표시부(34)와, 상기 마이콤(31)의 제어에 따라 세탁모타를 구동시켜 세탁동작을 수행하는 세탁 구동부(35)와, 상기 마이콤(31)의 제어에 따라 급수밸브 또는 급수모타 등을 구동시켜 세탁수를 급수하는 급수 제어부(36)와, 상기 마이콤(31)의 제어에 따라 배수밸브를 구동시켜 세탁수를 배수하는 배수 제어부(37)로 구성하였다.3 is a control circuit diagram of the water level adjusting device of the present invention, as shown in the figure, the microcomputer 31 for controlling the operation of the washing machine and the oscillation at a frequency according to the detected flow rate of the flow sensor 2 and the microcomputer 31. Oscillation unit 32 composed of inverters IV 1 , IV 2 , coils 22, resistors R 1 , R 2 , and capacitors C 1 , C 2 , and the microcomputer 31 A key input unit 33 for inputting a command, a display unit 34 for displaying an operating state of the washing machine under the control of the microcomputer 31, and a washing motor by driving the washing motor under the control of the microcomputer 31 to perform the washing operation. The washing drive unit 35 to perform, the water supply control unit 36 for supplying the washing water by driving a water supply valve or a water motor under the control of the microcomputer 31, and a drain valve under the control of the microcomputer 31. Was configured as a drain control unit 37 for draining the wash water.

이와 같이 구성된 본 발명의 수위 조절장치는 사용자가 키입력부(32)를 조작하여 세탁동작을 명령하면, 마이콤(31)은 급수 제어부(36)를 조작하여 세탁수를 급수하고, 세탁 구동부(35)를 제어하여 세탁모타를 구동시키면서 세탁동작을 수행하며, 배수제어부(37)를 제어하여 세탁수를 배수하게 됨과 아울러 세탁기의 세탁동작 등을 표시부(33)에 표시하게 된다.When the water level control device of the present invention configured as described above when the user operates the key input unit 32 to command the washing operation, the microcomputer 31 operates the water supply control unit 36 to supply the wash water, the washing drive unit 35 The washing operation is performed while driving the washing motor, and the drain control unit 37 controls the draining of the washing water and displays the washing operation of the washing machine on the display unit 33.

이와같이 동작함에 있어서, 본 발명은 세탁수를 급수할 경우에 급수구(1)를 통과한 세탁수가 유량센서(2)의 본체(21)로 유입되어 가동다이아프램(25)의 통공(25A), 스프링(24) 및 고정 슬리브(23)의 통공(23A)을 순차적으로 통과하여 세탁조(3)로 급수되는 것으로 급수되는 세탁수의 유량에 따라 가변다이아프램(25)이 전진하게 되고, 이로 인하여 코일(22)의 인덕턴스가 유량에 따라 가변되게 된다.In the operation as described above, in the present invention, when the wash water is supplied, the wash water passing through the water inlet 1 flows into the main body 21 of the flow sensor 2, and through the opening 25A of the movable diaphragm 25, The variable diaphragm 25 is advanced in accordance with the flow rate of the wash water which is sequentially supplied through the through hole 23A of the spring 24 and the fixing sleeve 23 to be supplied to the washing tank 3, thereby causing the coil The inductance of 22 is varied depending on the flow rate.

그러면, 코일(22)의 인덕턴스 변화에 따라 발진부(32)의 발진주파수가 가변 즉, 발진부(32)는 코일(22) 및 콘덴서(C1,C2)의 시정수에 따른 주파수로 발진되는 것으로 코일(22)의 인덕턴스의 변화에 따라 주파수가 가변되면서 발진하여 발진신호를 마이콤(31)에 입력하고, 마이콤(31)은 발진부(32)로부터 입력되는 발진신호의 주파수를 검출하여 급수되는 세탁수의 유량을 판단하고, 세탁수가 급수되는 시간을 카운트하여 카운트한 시간과 판단한 유량으로 세탁수의 급수량을 판단하여 세탁수의 수위를 정확히 판단히게 된다.Then, the oscillation frequency of the oscillator 32 is variable according to the change in inductance of the coil 22, that is, the oscillator 32 is oscillated at a frequency according to the time constant of the coil 22 and the capacitors C 1 and C 2 . The oscillation is performed while the frequency is changed according to the change of the inductance of the coil 22 to input the oscillation signal to the microcomputer 31, and the microcomputer 31 detects the frequency of the oscillation signal input from the oscillation unit 32 to supply water. The flow rate of the washing water is counted, and the number of times of washing water is counted, and the water supply amount of the washing water is determined based on the counted time and the determined flow rate to accurately determine the level of the washing water.

이상에서 상세히 설명한 바와 같이 본 발명은 유량센서를 이용하여 세탁수의 수위를 정확게 판단하므로 세탁수를 정확하게 급수할 수 있어 물의 낭비를 방지하고, 세탁수의 급수부족으로 인한 세탁물의 손상을 방지할 수 있는 효과가 있다.As described in detail above, the present invention accurately measures the water level of the wash water using a flow sensor, so that the wash water can be accurately supplied to prevent waste of water and to prevent damage to the laundry due to lack of water supply. It can be effective.

Claims (2)

세탁기의 동작을 제어하는 마이콤(31)과, 세탁조(3)로 급수되는 세탁수의 유량을 검출하는 유량센서(2)와, 상기 유량센서(2)가 검출한 유랑에 따른 주파수로 발진하여 상기 마이콤(31)에 입력시키는 발진부(32)를 구비하고, 상기 마이콤(31)은 발진부(32)의 발진 주파수 및 세탁수의 급수시간으로 세탁수의 수위를 판단하는 것을 특징으로 하는 유량센서를 이용한 세탁기의 수위 조절장치.The microcomputer 31 for controlling the operation of the washing machine, the flow sensor 2 for detecting the flow rate of the wash water supplied to the washing tank 3, and the oscillation at the frequency according to the flow detected by the flow sensor 2 The oscillation unit 32 is input to the microcomputer 31, and the microcomputer 31 uses the flow sensor to determine the water level of the washing water by the oscillation frequency of the oscillation unit 32 and the water supply time of the washing water. Water level control of the washing machine. 제1항에 있어서, 유량센서(2)는, 본체(21)의 외측에 코일(22)을 설치하고, 본체(21)내에는 세탁수가 통과하는 통공(23A)을 구비한 조정용 슬리브(23)를 고정설치함과 아울러 고정 슬리브(23)와의 사이에 비자성재질의 스프링(24)을 개재하여 통공(25A)을 구비한 가동 다이아프램(25)을 설치하여, 급수되는 세탁수의 유량에 따라 가동 다이아프램(25)이 전진 및 후진되면서 코일(22)의 인덕턴스가 가변되게 구성함을 특징으로 하는 유량센서를 이용한 세탁기의 수위 조절장치.The adjustment sleeve 23 according to claim 1, wherein the flow sensor 2 is provided with a coil 22 outside the main body 21, and has a through hole 23A through which washing water passes. And a movable diaphragm 25 having a through hole 25A between a fixing sleeve 23 and a non-magnetic spring 24 between the fixing sleeve 23 and the flow rate of the washing water to be supplied. Leveling device of the washing machine using a flow sensor, characterized in that the movable diaphragm 25 is configured to vary the inductance of the coil 22 while moving forward and backward.
KR1019930028923A 1993-12-21 1993-12-21 Water level control device of a washing machine KR960014277B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930028923A KR960014277B1 (en) 1993-12-21 1993-12-21 Water level control device of a washing machine

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Application Number Priority Date Filing Date Title
KR1019930028923A KR960014277B1 (en) 1993-12-21 1993-12-21 Water level control device of a washing machine

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KR950018887A KR950018887A (en) 1995-07-22
KR960014277B1 true KR960014277B1 (en) 1996-10-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100964668B1 (en) * 2003-05-06 2010-06-23 엘지전자 주식회사 device for sensing water level in washing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100730937B1 (en) * 2005-04-27 2007-06-22 주식회사 대우일렉트로닉스 Heating device for a drum type washing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100964668B1 (en) * 2003-05-06 2010-06-23 엘지전자 주식회사 device for sensing water level in washing machine

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