KR20010105608A - Laundry stiffness sensing method with Water level frequency for Washing machine - Google Patents

Laundry stiffness sensing method with Water level frequency for Washing machine Download PDF

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KR20010105608A
KR20010105608A KR1020000026213A KR20000026213A KR20010105608A KR 20010105608 A KR20010105608 A KR 20010105608A KR 1020000026213 A KR1020000026213 A KR 1020000026213A KR 20000026213 A KR20000026213 A KR 20000026213A KR 20010105608 A KR20010105608 A KR 20010105608A
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water level
frequency
laundry
quality
washing
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KR1020000026213A
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Korean (ko)
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KR100346271B1 (en
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우경철
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구자홍
엘지전자주식회사
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight

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

Abstract

In an apparatus and method for generating high power laser radiation, the geometry of the resonant laser cavity defines a fundamental spatial or transverse cavity mode. A gain medium is disposed within the resonant cavity and an energy source energizes the gain medium within a first volume. This causes spontaneous and stimulated energy emission to propagate in the gain medium in a direction transverse to the fundamental cavity mode. The transverse emission in turn optically pumps a second volume of the gain medium about the first volume. When the intensity of the emission is sufficiently high, inversion and gain are produced in the second volume. By optimizing the geometry of the cavity such that the fundamental cavity mode is coupled to both the first and the second volumes encompassing the first pumped volume, the transversely-directed energy of the first volume which would otherwise be wasted is instead captured by the fundamental beam, improving the overall power efficiently of the laser. When configured in an external cavity, the high-power laser of the present invention is especially amenable to frequency conversion of the output beam, as it provides beam intensities suitable for efficient nonlinear frequency conversion.

Description

수위 주파수를 이용한 세탁기의 포질 감지방법{Laundry stiffness sensing method with Water level frequency for Washing machine}Foaming method of washing machine using water level frequency {Laundry stiffness sensing method with Water level frequency for Washing machine}

본 발명은 세탁기에 관한 것으로서, 보다 상세하게는 세탁조와 펄세이터가 일체로 형성된 터보 드럼식 세탁기에 적용가능한 세탁기의 포질 감지방법에 관한 것이다.The present invention relates to a washing machine, and more particularly, to a method for detecting a quality of a washing machine applicable to a turbo drum washing machine in which a washing tank and a pulsator are integrally formed.

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(펄세이터 방식의 경우), 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 (in the case of a pulsator type), a drain valve for feeding and draining the washing water, a driving motor for driving the washing tank, various sensing means, and a signal from the sensing means It is composed of a microcomputer to determine the amount of detergent or laundry pattern to be administered based on the control and control the operation of the washing machine.

상기 감지수단은 세탁수의 급수량을 측정하는 수위센서를 비롯하여 빨래감의 양을 측정하는 포량 측정장치, 세탁수의 경도를 측정하는 경도 측정장치 및 세탁수의 온도를 측정하는 온도센서 등을 포함하여 이루어져 있는데, 최근에는 상기 수위센서를 이용하여 빨래감의 뻣뻣한 정도(stiffness), 즉 포질을 측정하고, 포질에 따라 세탁시간, 세탁 및 헹굼수류의 세기, 탈수시간, 탈수 시의 세탁조 회전속도 등을 조절하여 보다 효율적인 세탁작용을 이루는 포질감지 방법이 개발되었다.The sensing means includes a water level sensor for measuring the amount of washing water, a quantity measuring device for measuring the amount of laundry, a hardness measuring device for measuring the hardness of the washing water, and a temperature sensor for measuring the temperature of the washing water. Recently, the stiffness (stiffness) of the clothes, that is, the quality of the laundry is measured using the water level sensor, and the washing time, the strength of the washing and rinsing water, the dehydration time, the rotation speed of the washing tank during dehydration, etc. A fabric detection method has been developed to achieve more efficient washing.

여기서, 상기 수위센서는 도 1에 나타난 것과 같이 저수조(10) 내에 장착된 압력챔버(pressure chamber)(20)와 상기 압력챔버(20)에서 측정된 압력값을 전기신호화 하여 마이컴에 전달하는 신호부(22)로 구성되어 있고, 상기 압력챔버(20)가 세탁수의 양에 따른 수압을 측정하여 이를 바탕으로 신호부(22)가 각기 다른 압력값에 해당하는 각기 다른 주파수(수위주파수)의 신호를 마이컴에 전달하는 방식으로 수위를 측정하게 된다.Here, the water level sensor is a signal for transmitting a pressure chamber (20) mounted in the reservoir (10) and the pressure value measured in the pressure chamber 20 as an electrical signal to the microcomputer as shown in FIG. The pressure chamber 20 measures the water pressure according to the amount of wash water, and the signal unit 22 has different frequencies (water level frequencies) corresponding to different pressure values. The water level is measured by transmitting a signal to the microcomputer.

이러한 수위센서를 이용한 포질감지 방법에 대해 설명하면 다음과 같다.Referring to the foam detection method using the water level sensor as follows.

먼저, 펄세이터(12)가 회전하지 않는 상태에서의 세탁수의 수위를 직선형태의 X선이라 할 때, 펄세이터(12)가 회전하는 동안에는 세탁조(14)의 중심으로부터 가장자리 방향 즉 세탁조(14) 방향으로 세탁수가 압력을 받게 되므로, 세탁조(14) 내에서는 세탁수의 수위가 세탁조(14)의 내면을 타고 올라간 원추형태의 Y선과 같이 되고, 이때 세탁조(14)와 저수조(10) 사이의 세탁수 표면은 X선 보다 내려간 Yg선이 된다.First, when the water level of the washing water in the state in which the pulsator 12 does not rotate is called a linear X-ray, while the pulsator 12 rotates, the edge direction, that is, the washing tank 14, from the center of the washing tank 14 is rotated. Since the washing water is subjected to pressure in the direction of), the washing water level in the washing tank 14 becomes like a cone-shaped Y line that rises on the inner surface of the washing tank 14, wherein the washing tank 14 and the water storage tank 10 The wash water surface is a Yg ray lower than the X-ray.

여기서, 상기 X선과 Yg선의 수위차이 ㅿP를 펄세이터(12)의 회전 시 세탁조(14)의 중심에서 가장자리 방향으로 가해지는 압력이라고 볼 수 있는데, 이러한 압력결정 요인으로서 펄세이터(12)의 회전속도와 함께 세탁물의 포질이 중요한 변수로 작용하기 때문에 펄세이터(12)의 정지 시에 수위센서에 의해 측정되는 압력과 펄세이터(12) 회전 시의 압력과의 차이를 측정하여 그 변동폭에 따라 세탁물의 포질을 판단하게 된다.Here, it can be seen that the water level difference ㅿ P between the X-ray and the Yg-ray is the pressure exerted from the center of the washing tank 14 to the edge direction when the pulsator 12 rotates. As the pressure determining factor, the pulsator 12 rotates. Since the quality of the laundry acts as an important variable along with the speed, the difference between the pressure measured by the water level sensor when the pulsator 12 is stopped and the pressure when the pulsator 12 is rotated is measured and the laundry according to the fluctuation range. The quality of the will be judged.

즉, 포질이 뚜껍고 뻣뻣한 세탁물의 경우에는 얇고 부드러운 세탁물에 비해 강한 수류를 형성하기 때문에 펄세이터(12)의 회전속도가 동일하더라도 압력챔버(20)에 가해지는 압력이 크게 되는 원리를 이용한 것으로, 펄세이터(12) 정지 시의 압력과 회전 시의 압력과의 차이가 클수록 뚜껍고 뻣뻣한 포질의 세탁물로 판단하고 그에 따라 여러 가지 세탁패턴을 결정하게 되는 것이다.That is, in the case of thick and stiff laundry, a strong water flow is formed in comparison with the thin and soft laundry, even though the rotation speed of the pulsator 12 is the same, the pressure applied to the pressure chamber 20 is increased. The larger the difference between the pressure at the time of stopping the pulsator 12 and the pressure at the time of rotation, the thicker and stiff material is determined and the various washing patterns are determined accordingly.

그러므로, 이와 같은 종래기술에 의하면 별도의 구성요소를 필요로 하지 않고 기존 수위센서의 작동원리를 응용하여 효과적으로 세탁물의 포질을 측정할 수 있다는 장점이 있다.Therefore, according to the conventional technology, there is an advantage that the quality of the laundry can be effectively measured by applying the operating principle of the existing water level sensor without requiring a separate component.

그러나, 상술한 바와 같이 세탁조의 내면 측으로 가해지는 세탁수의 압력차를 측정하는 종래의 포질 감지방법에 의하면, 이른바 터보드럼식(turbo drum type)세탁기와 같이 세탁조와 펄세이터가 일체로 구성되어 세탁 시 세탁조가 회전하는 방식의 세탁기에서는 세탁조 측으로 가해지는 압력변화량이 크기 않기 때문에 세탁물의 정확한 포질 측정이 어렵다는 문제점이 있다.However, according to the conventional foam detection method for measuring the pressure difference of the washing water applied to the inner surface side of the washing tank, as described above, the washing tank and the pulsator are integrally formed, such as a turbo drum type washing machine. In a washing machine in which a washing tank rotates, it is difficult to accurately measure the quality of laundry because the pressure change applied to the washing tank is not large.

본 발명은 상기한 종래 문제점을 해결하고자 안출된 것으로, 그 적용범위가 넓고 보다 정확한 세탁물의 포질측정이 가능한 세탁기의 포질 감지방법 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 method for detecting the quality of a washing machine, which is broad in its scope and capable of measuring the quality of laundry.

도 1은 종래 교반식 세탁기의 구조 및 포질 감지방법에 사용되는 수위센서를 나타낸 개략도이다.1 is a schematic view showing the water level sensor used in the structure and the foam detection method of the conventional stirring washing machine.

도 2는 본 발명에 따른 포질 감지방법이 적용되는 터보드럼식 세탁기의 구조를 나타낸 부분 단면 사시도이다.2 is a partial cross-sectional perspective view showing the structure of a turbo drum type washing machine to which a foam detection method according to the present invention is applied.

도 3은 본 발명에 따른 포질 감지방법이 적용되는 터보드럼식 세탁기에서 수위센서의 구성을 개략적으로 나타낸 구성도이다.Figure 3 is a schematic diagram showing the configuration of the water level sensor in the turbo drum type washing machine to which the method for detecting the foam according to the present invention.

도 4는 본 발명에 따른 포질 감지방법을 나타낸 플로우 챠트이다.4 is a flowchart illustrating a method for detecting a foam according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

20: 압력챔버 22: 신호부20: pressure chamber 22: signal portion

30: 세탁조 32: 펄세이터30: washing tank 32: pulsator

fi: 수위주파수 fr: 포질감지 설정 주파수fi: Water level frequency fr: Quality detection frequency

fa: 평균 수위주파수fa: average water frequency

상기 목적을 이루기 위하여 제공되는 세탁기의 포질 감지방법은 급수가 시작되어 수위센서에 의해 전달되는 신호의 수위주파수가 포질감지 설정 주파수를 초과하는지 판단하는 급수단계와; 일정량 이상의 세탁수가 급수되어 수위주파수가 포질감지 설정 주파수 이상일 경우, 세탁조가 회전 작동하여 등가속으로 가속되고, 압력변동이 급격한 일정시간이 경과된 후, 계속되는 수위주파수 변동치를 측정하는 측정단계와; 세탁조의 회전 속도가 설정치 도달하면, 일정시간 경과후, 측정된 수위주파수 변동치를 합산하여 평균값을 구하는 계산단계와; 구해진 수위주파수의 평균값과 기설정된 기준주파수를 비교하여, 비교결과에 따라 세탁물의 포질을 판단하는 판단단계를 포함하여 이루어진다.The method for detecting a foam of a washing machine provided to achieve the above object includes: a water supply step of determining whether a water level frequency of a signal transmitted by the water level sensor exceeds a frequency detection setting frequency when water supply starts; A measurement step of measuring a water level frequency change value after a certain amount of washing water is supplied and the water level frequency is equal to or greater than the set frequency of the material detection, the washing tank is rotated and accelerated to an equivalent acceleration, and after a certain time of rapid pressure fluctuations; Calculating a mean value by summing the measured water level frequency fluctuations after a predetermined time when the rotational speed of the washing tank reaches the set value; And a determination step of determining the quality of the laundry according to the comparison result by comparing the average value of the obtained water level frequency with a preset reference frequency.

여기서, 상기 판단단계에서는 수위주파수의 평균값이 최대 기준주파수 이상일 경우에 세탁물의 포질이 얇고 부드러운 것으로 판단하고, 수위주파수의 평균값이 최대 기준주파수와 최소 기준주파수 사이일 경우에 세탁물의 포질이 중간정도인 것으로 판단하고, 수위주파수의 평균값이 최소 기준주파수 이하일 경우, 세탁물의 포질이 두껍고 뻣뻣한 것으로 판단하게 된다.Here, in the determining step, it is determined that the quality of the laundry is thin and smooth when the average value of the water level frequency is greater than or equal to the maximum reference frequency, and when the average value of the water level frequency is between the maximum reference frequency and the minimum reference frequency, the quality of the laundry is medium. If the average value of the water level frequency is less than the minimum reference frequency, it is determined that the quality of the laundry is thick and stiff.

이하, 본 발명의 실시예를 첨부된 도 2 부터 도 4를 참조로 하여 상세하게 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 4.

본 발명의 실시예에 따른 세탁기의 포질 감지방법은 도 2에 나타난 것과 같이 주로 세탁조(30)와 펄세이터(32)가 일체로 구성된 이른바 터보드럼 방식의 세탁기에 적용되며, 도 3에서와 같이 저수조(34) 내에 설치되는 수위센서의 작동특성(압력챔버에 의한 압력측정)을 이용하여 수행되는데, 도 3에 나타난 것과 같이 급수가 시작되어 수위센서에 의해 전달되는 신호의 수위주파수(fi)가 포질감지 설정 주파수를 초과하는지 판단함으로써 일정량 이상의 세탁수가 급수되도록 하는 급수단계(S1)와, 상기 급수단계가 진행됨으로써 일정량 이상의 세탁수가 급수되어 수위주파수(fi)가 포질감지 설정 수위주파수(fr)를 초과하는지 판단하는 단계(S2)와, 수위주파수가 포질감지 설정 쉬위주파수(fr)를 초과할 경우 세탁조가 회전 작동하여 등가속으로 가속되는 단계(S3)와, 압력변동이 급격한 일정시간이 경과된 후, 일정간격으로 수위주파수(fi)를 다수회 측정하여 계속되는 수위주파수 변동치를 측정하는 측정단계(S4)와, 세탁조의 회전속도가 설정속도에 도달하였는지를 판단하는 단계(S5)와, 세탁조의 회전속도가 설정속도에 도달한 다음 일정시간(약 5초)이 경과하였는지 판단하는 단계(S6)와, 일정시간이 경과한 다음에 측정된 각 수위주파수(fi)의 평균값 즉, 평균 수위주파수(fa)를 구하는 계산단계(S7)와, 구해진 평균 수위주파수(fa)와 기설정된 기준주파수를 비교하여, 비교결과에 따라 세탁물의 포질을 판단하는 판단단계(S8)를 포함하여 이루어진다.The method of detecting the quality of a washing machine according to an embodiment of the present invention is mainly applied to a washing machine of a so-called turbo drum type in which a washing tank 30 and a pulsator 32 are integrally formed as shown in FIG. 2, and a storage tank as shown in FIG. 3. It is carried out by using the operating characteristics (pressure measurement by the pressure chamber) of the water level sensor installed in the (34), the water level frequency (fi) of the signal transmitted by the water level sensor is started as shown in FIG. The water supply step (S1) for supplying a predetermined amount or more of the wash water by judging whether the texture paper setting frequency is exceeded, and the washing water is supplied in a predetermined amount or more by proceeding the water supply step so that the water level frequency (fi) is set to the level detection frequency (fr). Determining whether or not exceeding (S2), and if the water level frequency exceeds the foam detection setting frequency (fr) washing tank is rotated to accelerate to the equivalent acceleration (S3) ), And after a certain time of rapid pressure fluctuations, the measuring step (S4) to measure the water level frequency fluctuations by measuring the water level frequency fi several times at a predetermined interval, and the rotational speed of the washing tank reaches the set speed. Step (S5) of determining whether it has been carried out, determining whether a predetermined time (about 5 seconds) has elapsed after the rotational speed of the washing tank reaches the set speed (S6), and each water level frequency measured after the predetermined time has elapsed. Determination step of determining the quality of the laundry according to the comparison result by comparing the average value (fi), that is, the calculation step (S7) of obtaining the average water level frequency fa and the obtained average water level frequency fa and the predetermined reference frequency (S8) is made.

상기 판단단계(S8)에서의 기준주파수는 최대 기준주파수(A)와 최소 기준주파수(B)로 구분되며, 평균 수위주파수(fa)와 상기 최대 최소 기준주파수(A, B)의 비교결과, 평균 수위주파수(fa)가 최대 기준 주파수(A) 이상일 경우에는 세탁물의 포질이 얇고 부드러운 것으로 판단하고(S81), 평균 수위주파수(fa)가 최소 기준주파수(B)와 최대 기준주파수(A) 사이일 경우에는 세탁물의 포질이 중간정도인 것으로 판단하고(S82), 그렇지 않은 경우에는 평균 수위주파수(fa)가 최소 기준주파수(B) 이하인 것으로 간주하여 세탁물의 포질이 두껍고 뻣뻣한 것으로 판단하게 된다.The reference frequency in the determination step (S8) is divided into the maximum reference frequency (A) and the minimum reference frequency (B), the average of the water level frequency (fa) and the maximum minimum reference frequency (A, B) as a result of the comparison, the average If the water level frequency (fa) is greater than or equal to the maximum reference frequency (A), it is determined that the quality of the laundry is thin and soft (S81), and the average water level frequency (fa) is between the minimum reference frequency (B) and the maximum reference frequency (A). In the case, the quality of the laundry is determined to be medium (S82), otherwise the average water level frequency fa is considered to be less than or equal to the minimum reference frequency B, and the quality of the laundry is determined to be thick and stiff.

즉, 평균 수위주파수(fa)가 높을수록 얇고 부드로운 의류로 판단하게 되며, 평균 수위주파수(fa)가 낮을수록 두껍고 뻣뻣한 의류로 판단하게 된다.That is, the higher the average water level frequency fa is determined to be thin and soft clothing, and the lower the average water level frequency fa is determined to be thick and stiff clothing.

상술한 바와 같은 포질 감지방법에 의한 포질 측정결과, 감지된 세탁물의 포질에 따라 세탁패턴이 조정되는데, 세탁물의 포질이 얇고 부드러운 것으로 판단될 경우에는 세탁 및 헹굼과정에서 세탁수의 수류를 약하게 할뿐만 아니라, 탈수시간 등을 줄임으로써 옷감의 손상을 방지하는 패턴으로 세탁이 진행되며, 세탁물의 포질이 두껍고 뻣뻣한 것을 판단될 경우에는 세탁 및 헹굼과정에서 세탁수의 수류를강하게 함과 더불어 탈수시간 또한 연장하는 패턴으로 세탁이 진행됨으로써 세탁효과를 높이게 된다.As a result of measuring the quality of the cloth by the above-described method for detecting the quality of the laundry, the washing pattern is adjusted according to the quality of the laundry. In addition, washing is carried out in a pattern that prevents damage to the cloth by reducing the dehydration time, and if it is determined that the quality of the laundry is thick and stiff, the flow of washing water is strengthened and the dehydration time is also extended during the washing and rinsing process. Washing proceeds in a pattern to increase the washing effect.

이러한, 본 발명의 실시예에 따른 세탁기의 포질 감지방법은 세탁조의 회전 시 수위센서의 압력챔버에 가해지는 압력이 일정치에 도달하는 속도를 기준으로 하는 속도변수와, 세탁조가 특정 회전속도에 도달한 상태에서 압력챔버에 가해지는 압력을 기준으로 하는 압력변수의 두가지 변수를 측정하여 세탁물의 포질을 감지함으로써 종래의 압력변수만을 기준으로 한 포질감지방법에 비해 정확도가 높다고 볼 수 있다.Such a method for detecting the quality of a washing machine according to an embodiment of the present invention includes a speed variable based on a speed at which a pressure applied to the pressure chamber of the water level sensor reaches a predetermined value when the washing tank is rotated, and the washing tank reaches a specific rotation speed. By measuring two variables of the pressure variable based on the pressure applied to the pressure chamber in one state, the quality of the laundry can be detected, and thus the accuracy is higher than that of the conventional detection method based on only the pressure variable.

본 발명에 따른 세탁기의 포질 감지방법은 일반적인 펄세이터식의 세탁기 뿐만 아니라, 세탁조와 펄세이터가 일체구성된 터보드럼식의 세탁기에도 적용 가능하므로 그 적용범위가 넓고, 압력의 변화속도에 따른 속도변수와, 압력변화량에 따른 압력변수의 두가지 기준으로 포질을 감지하기 때문에 정확도 또한 높다는 이점을 제공한다.The method for detecting the quality of the washing machine according to the present invention is applicable to not only a general pulsator type washing machine but also a washing machine of a washing machine and a turbo drum type in which a pulsator is integrated, so that its application range is wide, and the speed variable according to the speed of change of pressure, The accuracy is also high because it detects the form quality based on the two criteria of the pressure variable according to the pressure change amount.

Claims (2)

급수가 시작되어 수위센서에 의해 전달되는 신호의 수위주파수가 포질감지 설정 주파수를 초과하는지 판단하는 급수단계와;A water supply step of determining whether the water level frequency of the signal transmitted by the water level sensor exceeds the foam detection setting frequency when water supply starts; 일정량 이상의 세탁수가 급수되어 수위주파수가 포질감지 설정 주파수 이상일 경우, 세탁조가 회전 작동하여 등가속으로 가속되고, 압력변동이 급격한 일정시간이 경과된 후, 계속되는 수위주파수 변동치를 측정하는 측정단계와;A measurement step of measuring a water level frequency change value after a certain amount of washing water is supplied and the water level frequency is equal to or greater than the set frequency of the material detection, the washing tank is rotated and accelerated to an equivalent acceleration, and after a certain time of rapid pressure fluctuations; 세탁조의 회전 속도가 설정치 도달하면, 일정시간 경과후, 측정된 수위주파수 변동치를 합산하여 평균값을 구하는 계산단계와,When the rotational speed of the washing tank reaches the set value, after a predetermined time, a calculation step of calculating the average value by summing the measured water level frequency change, 구해진 수위주파수의 평균값과 기설정된 기준주파수를 비교하여, 비교결과에 따라 세탁물의 포질을 판단하는 판단단계Determination step of determining the quality of the laundry according to the comparison result by comparing the average value of the water level frequency and the predetermined reference frequency 를 포함하여 이루어지는 세탁기의 포질 감지방법.Form detection method of the washing machine comprising a. 제1항에 있어서, 상기 판단단계에서는The method of claim 1, wherein the determining step 수위주파수의 평균값이 최대 기준주파수 이상일 경우, 세탁물의 포질이 얇고 부드러운 것으로 판단하고,If the average value of the water level frequency is above the maximum reference frequency, it is determined that the quality of the laundry is thin and soft. 수위주파수의 평균값이 최대 기준주파수와 최소 기준주파수 사이일 경우, 세탁물의 포질이 중간정도인 것으로 판단하고,If the average value of the water level frequency is between the maximum reference frequency and the minimum reference frequency, it is determined that the quality of the laundry is medium, 수위주파수의 평균값이 최소 기준주파수 이하일 경우, 세탁물의 포질이 두껍고 뻣뻣한 것으로 판단하는 것을 특징으로 하는 세탁기의 포질 감지방법.When the average value of the water level frequency is less than the minimum reference frequency, the quality of the laundry is characterized in that the thick and stiff laundry.
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CN102505422A (en) * 2011-09-22 2012-06-20 海尔集团公司 Miniature full-automatic washing machine with automatic water level calibrating device and calibrating method
WO2023063686A1 (en) 2021-10-12 2023-04-20 엘지전자 주식회사 Method for controlling clothing treatment apparatus
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