KR20010054769A - Water hardness Sensing unit of Washing machine - Google Patents
Water hardness Sensing unit of Washing machine Download PDFInfo
- Publication number
- KR20010054769A KR20010054769A KR1019990055728A KR19990055728A KR20010054769A KR 20010054769 A KR20010054769 A KR 20010054769A KR 1019990055728 A KR1019990055728 A KR 1019990055728A KR 19990055728 A KR19990055728 A KR 19990055728A KR 20010054769 A KR20010054769 A KR 20010054769A
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- South Korea
- Prior art keywords
- washing machine
- sensor
- conductivity sensor
- safety
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 238000005406 washing Methods 0.000 title claims abstract description 71
- 239000003599 detergent Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000009499 grossing Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000010349 pulsation Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- 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
- D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
-
- 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
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
-
- 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
- D06F2103/16—Washing liquid temperature
-
- 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
- D06F2103/20—Washing liquid condition, e.g. turbidity
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
본 발명은 세탁기의 작동효율 및 안전성 향상에 도움이 되는 수질감지장치에 관한 것으로, 본 발명에 따른 세탁기의 수질감지장치는 급수밸브(10)로 부터 세제통(20)을 거쳐 세탁조로 연결되는 유로상에서 세제통(20)에 앞서 위치되는 전도도센서(30)와 온도센서(40) 및, 상기 전도도센서(30)의 작동상 안전성을 높이기 위한 안전수단을 포함하여 구성된다.The present invention relates to a water quality detection device which helps to improve the operation efficiency and safety of the washing machine. The water quality detection device of the washing machine according to the present invention is provided on a flow path connected to a washing tank via a detergent container 20 from a water supply valve 10. It comprises a conductivity sensor 30 and the temperature sensor 40 located before the detergent container 20, and safety means for increasing the operational safety of the conductivity sensor 30.
여기서, 상기 안전수단은 마이컴(14)으로부터 트랜지스터(15)를 거쳐 전달되는 펄스신호를 내부 권선비에 따라 전도도센서(30) 측에 변환 유기시키며, 동시에 전도도센서(30)에서 측정된 전압차를 증폭하여 펄스신호화 하는 펄스 트랜스포머(32)와; 상기 펄스 트랜스포머(32)로 부터 출력된 펄스신호에 혼입된 맥동성분을 제거하기 위한 전압평활부(34)와, 펄스신호의 피크치를 조정하는 피크전압 조절부(36)로 이루어진다. 또한, 상기 각 센서(30)(40)는 부식에 강한 스테인레스나 구리 등의 재질로 이루어진다.Here, the safety means converts and induces the pulse signal transmitted from the microcomputer 14 through the transistor 15 to the conductivity sensor 30 in accordance with the internal winding ratio, and at the same time amplifies the voltage difference measured by the conductivity sensor 30 A pulse transformer 32 which pulses the signal; And a voltage smoothing unit 34 for removing pulsating components mixed in the pulse signal output from the pulse transformer 32, and a peak voltage adjusting unit 36 for adjusting the peak value of the pulse signal. In addition, each sensor 30, 40 is made of a material such as stainless steel or copper resistant to corrosion.
따라서, 상술한 바와 같은 본 발명에 따른 세탁기의 수질감지장치에 의하면 첫째, 전도도센서(30) 및 온도센서(40)의 위치상, 세제통(20)을 거치기 전에 세탁수의 경도를 파악하여 세탁수의 경도에 따라 적절한 세탁조건을 미리 설정할 수 있기 때문에 세탁기의 효율적인 사용에 도움이 되고, 둘째, 안전수단의 작동에 의해 전도도센서(30)의 작동 시 세탁기 사용자가 감전되는 등의 안전사고를 미연에 방지할 수 있기 때문에 세탁기의 안전성 향상에 도움이 되며, 셋째, 각 센서(30)(40)의재질적인 특성상 내구성이 강화됨으로써 세탁기의 상품성 향상에 도움이 된다는 이점이 있다.Therefore, according to the water quality detection device of the washing machine according to the present invention as described above, first, on the position of the conductivity sensor 30 and the temperature sensor 40, grasp the hardness of the wash water before passing through the detergent container 20 to wash the wash water The washing conditions can be set in advance according to the hardness of the washing machine, which helps in the efficient use of the washing machine. Second, the safety accident such as the electric shock of the washing machine user when the conductivity sensor 30 is operated by the operation of the safety means has not been observed. Since it can be prevented to help improve the safety of the washing machine, and third, there is an advantage that the durability of the material properties of each sensor 30, 40 is enhanced to help improve the commerciality of the washing machine.
Description
본 발명은 세탁기에 관한 것으로서, 보다 상세하게는 세탁기의 작동효율 및안전성 향상에 도움이 되는 수질감지장치에 관한 것이다.The present invention relates to a washing machine, and more particularly, to a water quality detecting device which helps to improve the operating efficiency and safety of the washing machine.
일반적으로 전자동 세탁기는 하나의 세탁조 내에서 세탁, 헹굼, 탈수의 모든 행정이 진행되며, 세제의 투여 및 행정전환 시에 필요한 급수 및 배수작용 등이 자동 수행되는 것으로, 저수조와, 상기 저수조에 내장되며 펄세이터(pulsator)가 구비된 세탁조와, 세탁수의 급배수를 위한 급배수밸브와, 세탁조를 구동시키기 위한 구동모터 및 각종 감지수단, 그리고 상기 감지수단에서 보내온 신호를 바탕으로 투여되는 세제의 양이나 세탁패턴 등을 결정하고 세탁기의 작동을 제어하는 마이컴을 포함하여 구성되어 있다.In general, the automatic washing machine performs all operations of washing, rinsing, and dehydration in one washing tank, and automatically performs water supply and drainage operations necessary for administration and conversion of detergent, and is built in a storage tank and the storage tank. A washing tank equipped with a pulsator, a drain valve for feeding and draining the washing water, a driving motor for driving the washing tank and various sensing means, and the amount of detergent administered based on the signal sent from the sensing means. It is configured to include a microcomputer for determining the washing pattern and the like and controlling the operation of the washing machine.
여기서, 상기 감지수단은 도 1에 나타난 것과 같이 세탁수의 전도도를 측정하는 전도도센서(10) 및 세탁수의 온도를 측정하는 온도센서(12)로 구성된 수질감지장치와, 세탁조에 저장된 세탁수의 양을 측정하는 수위센서(미도시) 등으로 이루어져 있는데, 상기 전도도센서(10)는 소정의 간격을 두고 떨어진 상태에서 세탁조 내의 세탁수와 접촉 가능하게 설치된 두개의 전도편을 기본적인 구성으로 하여 이루어져 있다.Here, the sensing means is a water quality sensing device consisting of a conductivity sensor 10 for measuring the conductivity of the wash water and a temperature sensor 12 for measuring the temperature of the wash water, as shown in Figure 1, and the wash water stored in the washing tank It consists of a water level sensor (not shown) for measuring the amount, etc., the conductivity sensor 10 is composed of two conducting pieces installed in contact with the wash water in the washing tank in a state separated by a predetermined interval as a basic configuration. .
이와 같은 수질감지장치에서는 전도도센서의 양 전도편 사이에 흐르는 세탁수의 전도도와, 온도센서(12)를 통해 측정한 세탁수의 온도값을 마이컴(14)에서 조합 환산하여 세탁수의 경도를 파악하게 되는데, 이와 같은 세탁수의 경도파악은 세탁수의 전도도가 마그네슘이온(Mg2+) 및 칼슘이온(Ca2+) 등의 경도성분 함유량과 세탁수의 온도에 따라 달라진다는 원리가 응용된 것이다. 즉, 마이컴(14)에서는 전도도를 결과값으로 하고, 경도성분 함유량과 세탁수의 온도를 상기 결과값을 결정하는 두개의 변수로 하는 경도결정 공식에, 측정된 전도도(결과값)와 세탁수의 온도(제1변수)를 대입함으로써 경도성분 함유량(제2변수)을 측정한 다음, 이를 경도단위(ppm)로 환산하는 방식으로 세탁수의 경도를 측정하게 된다.In such a water quality sensing device, the hardness of the wash water is determined by converting the conductivity of the wash water between both conductive pieces of the conductivity sensor and the temperature value of the wash water measured by the temperature sensor 12 in combination with the microcomputer 14. The hardness of the wash water is based on the principle that the conductivity of the wash water depends on the content of hardness components such as magnesium ions (Mg 2+ ) and calcium ions (Ca 2+ ) and the temperature of the wash water. . That is, in the microcomputer 14, the conductivity is determined as a result value, and the hardness determination formula using the hardness component content and the temperature of the wash water as two variables for determining the resultant value is obtained. The hardness of the wash water is measured by substituting the temperature (first variable) by measuring the hardness component content (second variable) and converting it into hardness units (ppm).
여기서, 세탁수의 경도를 측정하는 이유는, 계면활성제 등의 세제성분과 빠르게 반응하여 불활성 물질을 생성하는 경도성분의 특성상, 세탁수의 경도를 측정함으로써 상대적으로 세탁수에 잔류된 세제량을 파악하기 위해서이다.Here, the reason for measuring the hardness of the wash water is to determine the amount of detergent remaining in the wash water by measuring the hardness of the wash water, in view of the characteristics of the hardness component that reacts quickly with detergent components such as surfactants to generate an inert substance. For that.
즉, 세탁조 내에 급수된 세탁수의 경우, 세제통을 거치면서 세제를 함유한 상태이기 때문에 세탁공정이 종료된 후, 세탁수의 경도를 측정하여 세탁수에 용해된 세제의 양을 파악한 다음, 이를 기준으로 헹굼 횟수를 정하거나, 일정횟수의 헹굼을 거친 후라면 추가 헹굼이 필요한지를 알 수 있게 되며, 헹굼행정이 종료된 다음에는 헹굼수에 함유된 세제의 잔량을 파악하여 탈수행정으로의 진행 가능여부를 결정하게 되는 것이다.That is, in the case of the wash water supplied into the washing tank, after the washing process is finished, the washing water is finished, and after the washing process is finished, the hardness of the washing water is measured to determine the amount of detergent dissolved in the washing water. If the number of rinses is set, or after a certain number of rinses, additional rinsing is required. After the rinsing cycle is completed, the remaining amount of detergent contained in the rinsing water can be checked to proceed to the dehydration stroke. Will be determined.
한편, 전술한 바와 같이 물의 경도성분은 세제성분과 결합하여 세탁에 기여하지 않은 불활성 물질을 생성하므로, 세탁을 위해 공급되는 물에 대한 경도측정은 세제 투입량 결정을 위한 기준이 되는데, 종래의 수질측정장치에 의하면 이미 세제가 용해된 상태의 세탁수에 대한 경도를 감지할 수 있을 뿐, 세탁을 위해 공급되는 물 원래의 경도는 감지할 수 없기 때문에 세제의 투입량에 대한 결정을 수위센서를 통한 세탁수의 양만을 기준으로 하게된다. 따라서, 세제 투입량을 보다 정밀하게 조절할 수 없는 등 세탁기의 작동상 효율이 떨어진다는 문제점이 있다.On the other hand, as described above, since the hardness component of water combines with the detergent component to generate an inert material that does not contribute to washing, the hardness measurement for the water supplied for washing is a criterion for determining the detergent input amount. According to the device, it is possible to detect the hardness of the washing water in which the detergent is already dissolved, but not the original hardness of the water supplied for washing. It is based only on the amount of. Therefore, there is a problem that the operation efficiency of the washing machine is lowered, such as the detergent input amount can not be adjusted more precisely.
또한, 종래 수질감지장치에 의하면 전도도센서(10)의 작동특성상 양 전도편 사이에 전압이 인가되기 때문에 전도도센서(10)의 작동시간 동안 세탁조 내의 세탁수가 통전상태를 유지하게 된다. 따라서, 전도도센서(10)가 작동되는 도중에 사용자가 세탁기 뚜껑을 열고 세탁물을 추가하거나 하기 위해 세탁수에 손을 담그게 되면 감전사고가 발생하는 등 세탁기의 사용상 안전성이 떨어진다는 문제점이 발생한다.In addition, according to the conventional water quality detection device because the voltage is applied between the two conductive pieces due to the operating characteristics of the conductivity sensor 10, the wash water in the washing tank during the operating time of the conductivity sensor 10 maintains the energized state. Therefore, when the user opens the washing machine lid while the conductivity sensor 10 is in operation, and soaks the hand in the washing water to add laundry, there is a problem that the safety of the washing machine is lowered, such as an electric shock.
본 발명은 상기한 종래 문제점을 해결하고자 안출된 것으로, 그 위치 및 구성상 세탁기의 작동효율 및 안정성 향상에 도움이 되는 수질감지장치의 제공을 목적으로 한다.The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a water quality detecting device which helps to improve the operation efficiency and stability of the washing machine.
도 1은 일반적인 세탁기에 구비된 수질감지장치의 구성을 나타낸 회로도이다.1 is a circuit diagram showing the configuration of a water quality detecting device provided in a general washing machine.
도 2는 본 발명에 따른 세탁기의 수질감지장치가 취부된 위치를 나타낸 개략적인 단면도이다.Figure 2 is a schematic cross-sectional view showing the position where the water quality detection device of the washing machine according to the present invention.
도 3은 본 발명에 따른 세탁기의 수질감지장치 구성을 나타낸 회로도이다.3 is a circuit diagram showing the configuration of the water quality detection device of the washing machine according to the present invention.
도 4는 본 발명에 따른 세탁기의 수질감지장치의 구조를 나타낸 개략도이다.Figure 4 is a schematic diagram showing the structure of the water quality detection device of the washing machine according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
10: 급수밸브 11: 드레인홀10: water supply valve 11: drain hole
20: 세제통 14: 마이컴20: detergent container 14: micom
15: 트랜지스터 30: 전도도센서15: transistor 30: conductivity sensor
32: 펄스 트랜스포머 34: 전압 평활부32: pulse transformer 34: voltage smoothing part
36: 피크전압 조절부 40: 온도센서36: peak voltage control unit 40: temperature sensor
상기 목적을 이루기 위하여 제공되는 세탁기의 수질감지장치는, 급수밸브로 부터 세제통을 거쳐 세탁조로 연결된 유로상에서 세제통에 앞서 위치되는 전도도센서와 온도센서 및, 전도도센서의 작동상 안전성을 높이기 위한 안전수단을 포함하여 구성된다.The water quality detection device of the washing machine provided to achieve the above object, the conductivity sensor and the temperature sensor located in front of the detergent container on the flow path connected to the washing tank through the detergent container from the water supply valve, and safety means for increasing the safety of the operation of the conductivity sensor It is configured to include.
여기서, 상기 안전수단은 마이컴으로부터 트랜지스터를 거쳐 전달되는 펄스신호를 내부 권선비에 따라전도도센서 측에 변환 유기시키며, 동시에 전도도센서에서 측정된 전압차를 증폭하여 펄스신호화 하는 펄스 트랜스포머와; 상기 펄스 트랜스포머로 부터 출력된 펄스신호에 혼입된 맥동성분을 제거하기 위한 전압평활부와;펄스신호의 피크치를 조정하는 피크전압 조절부로 이루어진다.The safety means includes: a pulse transformer for converting and inducing the pulse signal transmitted from the microcomputer through the transistor to the conductivity sensor side according to the internal winding ratio, and simultaneously amplifying the voltage difference measured by the conductivity sensor; And a voltage smoothing unit for removing pulsation components mixed in the pulse signal output from the pulse transformer; and a peak voltage adjusting unit for adjusting the peak value of the pulse signal.
또한, 상기 각 센서는 부식에 강한 스테인레스나 구리 등의 재질로 이루어진다.In addition, each sensor is made of a material such as stainless steel or copper resistant to corrosion.
이하, 본 발명의 실시예를 첨부된 도 2 부터 도 4를 참조로 하여 상세하게 설명하며, 본 발명의 내용 중 종래구성과 동일한 부분에 대해서는 동일한 부호를 부여하고, 그 설명을 생략하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 4, and the same reference numerals will be given to the same parts as those in the prior art, and the description thereof will be omitted.
우선, 본 발명의 실시예에 따른 수질감지장치는 도 2에 나타난 것과 같이 급수밸브(10)로부터 세제통(20)을 거쳐 세탁조로 연결된 유로상에 위치되는 전도도센서(30) 및 온도센서(40)와, 상기 전도도센서(30)의 작동안전성을 높이기 위한 안전수단을 포함하여 이루어지는데, 상기 안전수단은 도 3에 나타난 것과 같이 마이컴(14)으로부터 트랜지스터(15)를 거쳐 전달되는 펄스신호를 내부 권선비에 따라 전도도센서(30) 측에 변환 유기시키며, 동시에 전도도센서(30)에서 측정된 전압차를 증폭하여 펄스신호화 하는 펄스 트랜스포머(32)와, 상기 펄스 트랜스포머(32)로 부터 인가된 펄스신호에 혼입된 맥동성분을 제거하기 위한 전압 평활부(34)와, 펄스신호의 피크치를 조정하는 피크전압 조절부(36)를 포함하여 이루어진다.First, the water quality detection apparatus according to the embodiment of the present invention, as shown in Figure 2, the conductivity sensor 30 and the temperature sensor 40 located on the flow path connected to the washing tank via the detergent container 20 from the water supply valve 10 And, it comprises a safety means for increasing the operational safety of the conductivity sensor 30, the safety means is a pulse signal transmitted from the microcomputer 14 through the transistor 15 as shown in Figure 3 the internal winding ratio The pulse transformer 32 converts and induces the conductivity on the side of the conductivity sensor 30 and simultaneously amplifies the voltage difference measured by the conductivity sensor 30 into a pulse signal, and a pulse signal applied from the pulse transformer 32. And a voltage smoothing part 34 for removing the pulsating component mixed with the peak voltage, and a peak voltage adjusting part 36 for adjusting the peak value of the pulse signal.
여기서, 본 실시예에 따른 수질감지장치는 도 4에 나타난 것과 같이 안전수단을 구성하는 각 회로요소들이 각 센서(30)(40)와 일체로 구성된 케이스(50) 내에 구비되는 단일구조체 형태로 이루어지거나, 이와 달리 상기 안전수단을 구성하는 회로요소들이 세탁기의 메인기판에 구성되는 분리형태로 이루어질 수 있다.Here, the water quality detection apparatus according to the present embodiment is formed in a unitary structure in which each circuit element constituting the safety means is provided in the case 50 integrally formed with each sensor 30, 40, as shown in FIG. Alternatively, the circuit elements constituting the safety means may be formed in a separate form configured on the main board of the washing machine.
더불어, 본 실시예에 따른 수질감지장치의 구성요소 중에서 각 센서(30)(40)를 비롯하여 그 작동시 세탁수와 접하는 소위 접수(接水)부위는 내부식성 및 전도성이 좋은 스테인레스나 구리 등의 재질로 이루어진다.In addition, among the components of the water quality detection apparatus according to the present embodiment, each of the sensors 30 and 40, and the so-called receiving portion that comes into contact with the wash water during its operation, is made of stainless steel or copper, which has good corrosion resistance and conductivity. It is made of material.
도 2에서 미설명된 부호 11은 세탁수의 급수작용이 중단된 다음, 유로상에 고인 세탁수를 세탁조로 배수하기 위한 드레인홀을 나타낸다.In FIG. 2, reference numeral 11 denotes a drain hole for draining the wash water accumulated on the flow path to the washing tank after the water supply action of the wash water is stopped.
상술한 바와 같은 본 발명의 수질감지장치 및 세탁기 제어방법에 의해 이루어지는 세탁기의 작동에 대해 설명하면 다음과 같다.Referring to the operation of the washing machine made by the water quality detection device and the washing machine control method of the present invention as described above are as follows.
우선, 세탁기의 작동이 시작되면, 전도도센서(30) 및 온도센서(40)에 전원이 인가되고, 급수밸브(10)로부터 세탁조로 세탁수가 급수되며, 각 센서(30)(40)는 그 위치상 세제통(20)의 상방에서, 급수되는 세탁수와 접하게 된다. 이때, 전도도센서(30)에는 마이컴(14)에서 전달되는 펄스신호가 트랜지스터(15)에 의해 스위칭된 다음, 펄스 트랜스포머(32)에 의해 낮은 전압으로 변환 유기되며, 상기 전도도센서(30)에 의해 감지되는 전도도 차이는 역으로 펄스 트랜스포머(32)에 의해 증폭되어 마이컴(14)으로 전달된다.First, when the operation of the washing machine is started, power is applied to the conductivity sensor 30 and the temperature sensor 40, the washing water is supplied from the water supply valve 10 to the washing tank, and each sensor 30, 40 is positioned at that position. Above the upper detergent container 20, it comes into contact with the wash water supplied. At this time, in the conductivity sensor 30, the pulse signal transmitted from the microcomputer 14 is switched by the transistor 15, and then converted into a low voltage by the pulse transformer 32, and is induced by the conductivity sensor 30. The sensed difference in conductivity is reversely amplified by the pulse transformer 32 and transmitted to the microcomputer 14.
여기서, 상기 펄스 트랜스포머(32)에 의해 증폭된 펄스신호는 전압 평활부(34)를 거치면서 평활 처리되어 혼입된 맥동성분이 제거되고, 이어서, 피크전압 조절부(36)를 거치면서 피크치가 조정되어 보다 안정된 상태로 마이컴(14)에 입력된다.Here, the pulse signal amplified by the pulse transformer 32 is smoothed while passing through the voltage smoothing unit 34 to remove the pulsating component mixed therein, and then the peak value is adjusted while passing through the peak voltage adjusting unit 36. And input to the microcomputer 14 in a more stable state.
마이컴(14)에서는 안전수단에 의한 이른바 안정화 과정을 거친 펄스신호를 인가 받아 세탁수의 전도도를 측정하게 되며, 이러한 세탁수의 전도도를 온도센서(40)에서 검출된 세탁수의 온도정보와 조합함으로써 세탁수의 경도를 파악하고, 파악된 세탁수의 경도에 따라 보다 적절한 세탁조건(세제 투입량, 세탁시간,헹굼횟수 등)을 결정하게 된다.The microcomputer 14 receives the so-called stabilization pulse signal by the safety means to measure the conductivity of the wash water, and combines the conductivity of the wash water with temperature information of the wash water detected by the temperature sensor 40. The hardness of the wash water is determined, and more appropriate washing conditions (detergent amount, washing time, rinsing frequency, etc.) are determined according to the determined hardness of the wash water.
따라서, 본 실시예에 의한 수질감지장치에 의하면 각 센서(30)(40)가 세탁조와 격리 위치됨으로써 그 작동 시 세탁조에 저수된 세탁수에 까지 측정전압이 인가될 가능성이 적으며, 측정전압이 인체에 해를 미치지 않은 정도로 낮게 형성된 상태이기 때문에, 세탁조 내의 세탁수에 까지 측정전압이 인가된 상태에서 사용자가 세탁수와 접촉하더라도 감전으로 인해 상해를 입는 등의 사고가 방지된다. 더불어, 전도도센서(30)에서 마이컴(14)으로 입력되는 펄스 신호가 전압 평활부(34) 및 피크전압 조절부(36)에 의해 안정된 상태로 전환되기 때문에 더욱 정밀한 전도도 측정이 가능해진다.Therefore, according to the water quality detection apparatus according to the present embodiment, since each sensor 30, 40 is separated from the washing tank, the measuring voltage is less likely to be applied to the washing water stored in the washing tank during the operation. Since the state is formed to a low level that does not harm the human body, even if the user comes into contact with the wash water while the measurement voltage is applied to the wash water in the washing tank, an accident such as an injury due to electric shock is prevented. In addition, since the pulse signal input from the conductivity sensor 30 to the microcomputer 14 is converted into a stable state by the voltage smoothing unit 34 and the peak voltage adjusting unit 36, more accurate conductivity measurement is possible.
그리고, 본 실시예에 따른 수질감지장치는, 전술한 바와 같이 각 센서(30)(40) 및 그 주위의 접수부위가 스테인레스나 구리 등과 같이 내부식성이 강하고, 전도성이 높은 재질로 이루어지기 때문에 그 내구성이 향상된다.As described above, the water quality detecting apparatus according to the present embodiment is formed of a material having high corrosion resistance and high conductivity, such as stainless steel or copper, for each sensor 30 and 40 and its reception portion. Durability is improved.
본 발명에 따른 세탁기의 수질감지장치에 의하면 첫째, 전도도센서 및 온도센서의 위치상, 세제통을 거치기 전에 세탁수의 경도를 파악하여 세탁수의 경도에 따라 적절한 세탁조건을 미리 설정할 수 있기 때문에 세탁기의 작동효율 향상에 도움이 되고, 둘째, 안전수단의 작동에 의해 전도도센서의 작동 시 세탁기 사용자가 감전되는 등의 안전사고를 미연에 방지할 수 있기 때문에 세탁기의 안전성 향상에 도움이 되며, 셋째, 각 센서의 재질적인 특성상 내구성이 강화됨으로써 세탁기의 상품성 향상에 도움이 된다는 이점이 있다.According to the water quality detection device of the washing machine according to the present invention, first, in accordance with the position of the conductivity sensor and the temperature sensor, grasp the hardness of the washing water before passing through the detergent container, so that the appropriate washing conditions can be set in advance according to the hardness of the washing machine. Second, it helps to improve the operation efficiency, and secondly, it can help to improve the safety of the washing machine because it prevents safety accidents such as electric shock of the washing machine user when the conductivity sensor is operated by the operation of safety means. Durability is enhanced due to the material properties of the sensor has the advantage of helping to improve the marketability of the washing machine.
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| KR1019990055728A KR100329274B1 (en) | 1999-12-08 | 1999-12-08 | Water hardness Sensing unit of Washing machine |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20040046927A (en) * | 2002-11-28 | 2004-06-05 | 엘지전자 주식회사 | Quality of water sensing device of washing machine |
| KR100479100B1 (en) * | 2002-11-28 | 2005-03-28 | 엘지전자 주식회사 | Washing machine and control method |
| KR100484842B1 (en) * | 2002-11-29 | 2005-04-22 | 엘지전자 주식회사 | A washing machine being possible to sense the hardness of water and washing method for the same |
| KR100484840B1 (en) * | 2002-11-29 | 2005-04-22 | 엘지전자 주식회사 | A washing machine with apparatus for sensing the quality of water and washing method for the same |
| KR100680195B1 (en) * | 2003-03-31 | 2007-02-08 | 엘지전자 주식회사 | Water quality sensor of washing machine |
| KR100697066B1 (en) * | 2003-08-12 | 2007-03-20 | 엘지전자 주식회사 | Washing method of washing machine |
| KR100712901B1 (en) * | 2003-01-28 | 2007-05-02 | 엘지전자 주식회사 | Hardness sensor of washing machine |
| KR100791436B1 (en) * | 2006-12-29 | 2008-01-04 | 엘지전자 주식회사 | Hardness sensor of washing machine |
| KR100971016B1 (en) * | 2002-11-28 | 2010-07-20 | 엘지전자 주식회사 | How to clean the washing tank of the washing machine |
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| KR100978102B1 (en) * | 2003-06-23 | 2010-08-26 | 엘지전자 주식회사 | How to determine the amount of detergent in the washing machine |
| US12264426B2 (en) | 2022-12-21 | 2025-04-01 | Midea Group Co., Ltd. | Laundry washing machine and low profile conductivity sensor therefor |
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- 1999-12-08 KR KR1019990055728A patent/KR100329274B1/en not_active Expired - Fee Related
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| KR20040046927A (en) * | 2002-11-28 | 2004-06-05 | 엘지전자 주식회사 | Quality of water sensing device of washing machine |
| KR100479100B1 (en) * | 2002-11-28 | 2005-03-28 | 엘지전자 주식회사 | Washing machine and control method |
| KR100971016B1 (en) * | 2002-11-28 | 2010-07-20 | 엘지전자 주식회사 | How to clean the washing tank of the washing machine |
| KR100484842B1 (en) * | 2002-11-29 | 2005-04-22 | 엘지전자 주식회사 | A washing machine being possible to sense the hardness of water and washing method for the same |
| KR100484840B1 (en) * | 2002-11-29 | 2005-04-22 | 엘지전자 주식회사 | A washing machine with apparatus for sensing the quality of water and washing method for the same |
| KR100712901B1 (en) * | 2003-01-28 | 2007-05-02 | 엘지전자 주식회사 | Hardness sensor of washing machine |
| KR100680195B1 (en) * | 2003-03-31 | 2007-02-08 | 엘지전자 주식회사 | Water quality sensor of washing machine |
| US7971301B2 (en) | 2003-05-28 | 2011-07-05 | Lg Electronics Inc. | Washing machine and the control method of the same |
| US8015645B2 (en) | 2003-05-28 | 2011-09-13 | Lg Electronics Inc. | Washing machine and a method of controlling the same based on measured hardness of water |
| KR101016301B1 (en) * | 2003-08-07 | 2011-02-22 | 엘지전자 주식회사 | How to wash the washing machine |
| KR101016295B1 (en) * | 2003-08-07 | 2011-02-22 | 엘지전자 주식회사 | How to wash the washing machine |
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| KR100791436B1 (en) * | 2006-12-29 | 2008-01-04 | 엘지전자 주식회사 | Hardness sensor of washing machine |
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