KR20060061319A - Method for detecting amount of the washing in washer - Google Patents

Method for detecting amount of the washing in washer Download PDF

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Publication number
KR20060061319A
KR20060061319A KR1020060035391A KR20060035391A KR20060061319A KR 20060061319 A KR20060061319 A KR 20060061319A KR 1020060035391 A KR1020060035391 A KR 1020060035391A KR 20060035391 A KR20060035391 A KR 20060035391A KR 20060061319 A KR20060061319 A KR 20060061319A
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South Korea
Prior art keywords
motor
value
amount
speed
washing machine
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KR1020060035391A
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Korean (ko)
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KR100789829B1 (en
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김재겸
권호철
손권
박종아
최강모
황진성
김용태
김경훈
손창우
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엘지전자 주식회사
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of 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
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting

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

Abstract

본 발명은 드럼세탁기의 포량 감지방법에 관한 것으로, 드럼세탁기에 투입된 포량을 정확하게 감지할 수 있도록 한 것이다. The present invention relates to a method for detecting a quantity of drum washing machine, so that it is possible to accurately detect the amount of the drum washing machine.

이를 위해 본 발명은 모터를 일정 회전수까지 상승시키는 가속단계; 모터 속도가 일정 회전수에 도달하면 일정 시간 동안 폐(閉)루프(closed loop) 제어를 하면서 모터 속도를 등속으로 유지하는 정속단계; 상기 정속단계에서 산출된 편심값과, 모터에 인가된 DC 전압 및, 모터의 토오크값을 이용하여 포량값을 산출하는 단계를 포함하여 구성된 드럼세탁기의 포량 감지방법을 제공한다.To this end, the present invention provides an acceleration step of raising the motor to a predetermined rotation speed; A constant speed step of maintaining the motor speed at a constant speed while maintaining a closed loop control for a predetermined time when the motor speed reaches a predetermined rotation speed; It provides a method for detecting the amount of drum washing machine configured to include the step of calculating the value of the carrying out by using the eccentric value calculated in the constant speed step, the DC voltage applied to the motor, and the torque value of the motor.

드럼세탁기, 포량 감지, 폐루프 제어, closed loop Drum washing machine, quantity detection, closed loop control, closed loop

Description

드럼세탁기의 포량 감지 방법{Method for Detecting Amount of the Washing in Washer}Method for Detecting Amount of Washing in Drum Washing Machine {Method for Detecting Amount of the Washing in Washer}

도 1은 일반적인 드럼세탁기의 구조를 나타낸 요부 단면도1 is a cross-sectional view of the main part showing the structure of a general drum washing machine

도 2는 본 발명에 따른 드럼세탁기의 포량 감지 방법을 설명하는 순서도Figure 2 is a flow chart illustrating a method for detecting the amount of drum washing machine according to the present invention

도 3은 도 2의 포량 감지 방법을 설명하는 그래프3 is a graph illustrating a method of detecting a quantity of FIG. 2.

본 발명은 드럼세탁기를 제어하는 방법에 관한 것으로, 특히 드럼세탁기에 투입되는 세탁물의 양, 즉 포량을 정밀하게 감지하여 물 사용량과 전체 행정시간을 단축할 수 있도록 한 드럼세탁기의 포량 감지방법에 관한 것이다.The present invention relates to a method for controlling a drum washing machine, and more particularly, to a drum washing machine for detecting a quantity of laundry put into a drum washing machine, that is, a quantity of water, so as to reduce water consumption and overall stroke time. will be.

일반적으로, 드럼 세탁 방식은 세제와 세탁수 및 세탁물이 드럼 내에 투입된 상태에서, 모터의 구동력을 전달받아 회전하는 드럼과 세탁물의 마찰력을 이용하여 세탁을 행하는 방식으로서, 세탁물의 손상이 거의 없고, 세탁물이 서로 엉키지 않으며, 두드리고 비벼빠는 세탁효과를 낼 수 있다.In general, the drum washing method is a method in which the laundry is performed using the friction force of the rotating drum and the laundry by receiving the driving force of the motor while the detergent, the washing water, and the laundry are put in the drum. These don't get tangled with each other, and can be washed and pounded.

이러한 드럼세탁기는 세탁 또는 탈수과정에서 포량을 감지하여 탈수 과정에서 정확한 탈수행정의 제어가 이루어지도록 하고 있는데, 종래의 드럼세탁기는 다 음과 같은 방식으로 포량을 감지한다. The drum washing machine detects the amount of water in the washing or dewatering process to control the exact dehydration stroke during the dewatering process. The conventional drum washing machine detects the amount of water in the following manner.

세탁행정이 시작되면, 미리 설정된 수위까지 세탁수가 공급되고, 이어서 세탁물에 세탁수가 골고루 스며들도록 모터를 작동시켜 드럼을 좌우로 교반시킨다.When the washing administration starts, the washing water is supplied to a predetermined level, and then the drum is left and right stirred by operating a motor to evenly wash the washing water into the laundry.

이와 같이 드럼의 좌우 교반에 의해 세탁물이 세탁수를 일정정도 흡수하면 수위가 설정수위 이하로 낮아지게 되고, 제어부에서는 재급수가 필요한지 여부를 판단한다. In this way, when the laundry absorbs the wash water to some extent by the left and right stirring of the drum, the water level is lowered below the set water level, and the control unit determines whether the water supply is necessary.

이 단계에서 재급수가 필요한 것으로 판정되면, 드럼의 좌우 교반을 멈추고 다시 설정 수위까지 급수를 하고 드럼의 교반을 반복한다.If it is determined at this stage that the water supply is necessary, the left and right stirring of the drum is stopped, the water is supplied again to the set level, and the stirring of the drum is repeated.

그리고, 제어부에서는 이러한 과정을 미리 정해놓은 설정시간까지 반복 실시하고, 재급수 횟수를 카운트하며, 설정시간이 경과하면 상기 설정시간동안 카운트된 재급수 횟수에 따라 포량을 판정한다. 여기서, 재급수 횟수에 따른 포량의 판정기준은 미리 실험을 통해 결정되어 제어부에 프로그램되어 있다.Then, the control unit repeats this process up to a predetermined set time, counts the number of refills, and if the set time has elapsed, determines the amount of water according to the number of refills counted during the set time. Here, the criterion of determination of the amount of water according to the number of refills is determined in advance through an experiment and programmed in the controller.

예를 들어, 재급수 횟수가 2미만이면 포량이 2kg 미만인 것으로 판정하고, 재급수 횟수가 7보다 많으면 포량이 5kg 이상인 것으로 판정한다.For example, when the number of times of refilling is less than 2, it is determined that the amount of water is less than 2 kg.

이와 같은 방식으로 포량이 판정되면, 판정된 포량에 따라 정해진 세탁행정을 진행한다. When the amount of water is determined in this manner, the washing operation determined according to the determined amount of water is carried out.

그런데, 상기와 같은 종래의 드럼세탁기의 포량감지방법은 급수 시간이 오래걸리고, 프로그램된 몇개의 판정 기준에 의해 포량을 판정하게 되므로 세탁물의 종류에 따라 정확한 포량의 판정이 이루어지지 못하는 문제점이 있어 급수량이 과다하게 되는 문제가 발생한다.However, in the conventional drum washing machine, the quantity detection method of the conventional drum washing machine takes a long time for water supply, and determines the amount of water according to some of the programmed criteria. This excessive problem arises.

종래의 드럼세탁기에서 포량을 감지하는 또 다른 방식으로는 탈수를 수행하기 전에 모터의 회전속도를 개(開)루프(open loop) 제어방식으로 일정 회전수까지 상승시켜 포량을 감지하는 방식이 있다. Another method of detecting the amount of capacity in a conventional drum washing machine is to increase the rotational speed of the motor to a certain number of revolutions in an open loop control method before dehydration is performed.

통상적으로 포량이 많은 경우에는 부하가 크기 때문에 모터에 동일한 힘을 인가하더라도 속도가 천천이 올라가는 반면에, 포량이 적은 경우에는 부하가 작기 때문에 동일한 힘에서 속도가 빨리 올라하게 되는 바, 이러한 속도 상승의 차이를 이용하여 포량을 감지한다.In general, if the load is large, the speed will go up slowly even if the same force is applied to the motor. However, if the load is small, the speed will rise quickly at the same force because the load is small. Use the difference to detect the volume.

그러나, 상기와 같이 모터를 개루프(open loop) 방식으로 제어하며 포량을 감지하는 경우 정확한 토크량과 편심량을 얻을 수 없기 때문에 포량을 감지하는 능력이 떨어져 정밀한 포량을 감지할 수 없는 문제가 있다.However, as described above, when the motor is controlled in an open loop manner and the amount of detected amount is detected, the precise amount of torque and the amount of eccentricity cannot be obtained.

이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 드럼세탁기에 투입된 포량을 정확하게 감지할 수 있는 드럼세탁기의 포량 감지방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, it is an object of the present invention to provide a method for detecting the amount of drum washing machine that can accurately detect the amount of the drum washing machine.

상기와 같은 목적을 달성하기 위한 본 발명은 모터를 일정 회전수까지 상승시키는 가속단계; 모터 속도가 일정 회전수에 도달하면 일정 시간 동안 폐(閉)루프(closed loop) 제어를 하면서 모터 속도를 등속으로 유지하는 정속단계; 상기 정속단계에서 산출된 편심값과, 모터에 인가된 DC 전압 및, 모터의 토오크값을 이용하여 포량값을 산출하는 단계를 포함하여 구성된 드럼세탁기의 포량 감지방법을 제 공한다.The present invention for achieving the above object is an acceleration step of raising the motor to a predetermined number of revolutions; A constant speed step of maintaining the motor speed at a constant speed while maintaining a closed loop control for a predetermined time when the motor speed reaches a predetermined rotation speed; It provides a method for detecting the amount of drum washing machine configured to include the step of calculating the value of the carrying out by using the eccentric value calculated in the constant speed step, the DC voltage applied to the motor, and the torque value of the motor.

이하, 본 발명에 따른 드럼세탁기의 포량 감지방법의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다. Hereinafter, with reference to the accompanying drawings a preferred embodiment of the amount of detection of the drum washing machine according to the present invention will be described in detail.

먼저, 이해를 돕기 위해 본 발명의 포량 감지방법이 적용되는 일반적인 드럼세탁기의 구조를 도 1을 참조하여 설명하면 다음과 같다. First, the structure of a general drum washing machine to which the dose sensing method of the present invention is applied will be described with reference to FIG.

도 1에 도시된 것과 같이, 드럼세탁기의 캐비닛(1) 내측에 터브(2; Tub)가 설치되고, 상기 터브(2) 내측 중앙에는 드럼(3)이 회전가능하게 설치되며, 상기 터브(2)의 하부 일측에는 모터(4)가 설치되고, 상기 모터(4)에는 모터 풀리(41)가 축연결된다.As illustrated in FIG. 1, a tub 2 is installed inside the cabinet 1 of the drum washing machine, and a drum 3 is rotatably installed in the center of the tub 2. A motor 4 is installed on one side of the lower side, and the motor pulley 41 is axially connected to the motor 4.

그리고, 상기 드럼(3) 후방에는 드럼축(32)이 설치되고, 상기 드럼축(32)에는 드럼 풀리(31)가 설치되어, 이 드럼 풀리(31)가 동력전달요소인 벨트(5)에 의해 모터(4)에 연결된 모터 풀리(41)와 연결되어 연동하게 된다.A drum shaft 32 is installed at the rear of the drum 3, and a drum pulley 31 is installed at the drum shaft 32, and the drum pulley 31 is attached to the belt 5, which is a power transmission element. It is connected to and interlocked with the motor pulley 41 connected to the motor (4).

그리고, 상기 캐비닛(1) 전방에는 도어(6)가 설치되고, 도어(6)와 터브(2) 사이에는 가스켓(7)이 설치된다.A door 6 is installed in front of the cabinet 1, and a gasket 7 is installed between the door 6 and the tub 2.

한편, 상기 캐비닛(1) 상부면 내측의 양측부와 터브(2)의 외주면 상부 사이에는 상기 터브(2)를 부유상태로 지지하는 스프링(9)이 설치되고, 상기 캐비닛(1) 하부면 양측 모서리부와 터브(2) 외주면 하부의 양측부 사이에는 댐퍼(8)가 설치되어 탈수시 드럼(3)의 회전에 따라 발생하는 터브(2)의 진동을 흡수하여 감쇠시키도록 되어 있다.On the other hand, a spring 9 for supporting the tub 2 in a floating state is installed between both sides of the inside of the upper surface of the cabinet 1 and an upper portion of the outer peripheral surface of the tub 2, and both sides of the lower surface of the cabinet 1. A damper 8 is provided between the corner portion and both sides of the lower portion of the outer peripheral surface of the tub 2 to absorb and attenuate the vibration of the tub 2 generated by the rotation of the drum 3 during dehydration.

상기 드럼세탁기는 상기 모터(4)의 작동에 의해 모터 풀리(41)가 회전하게 되면, 벨트(5)에 의해 드럼 풀리(31)로 동력이 전달되어 드럼축(32)이 회전하게 되고, 이에 따라 드럼(3)이 회전하면서 세탁 또는 탈수 행정을 수행하게 된다.When the drum washing machine rotates the motor pulley 41 by the operation of the motor 4, power is transmitted to the drum pulley 31 by the belt 5 so that the drum shaft 32 rotates. Accordingly, the drum 3 rotates to perform the washing or dehydration stroke.

한편, 상기와 같은 드럼세탁기는 세탁 행정이 완료되고 탈수 행정으로 진입하기 전에 포량을 감지하게 된다.On the other hand, the drum washing machine as described above is to detect the amount of laundry before the washing stroke is completed and enters the dehydration stroke.

도 2와 도 3을 참조하여 본 발명에 따른 드럼세탁기의 포량 감지방법에 대해 상세히 설명하면, 먼저 탈수 행정 진입전에 모터(4)에 소정의 DC 전압을 인가하여 모터 회전수를 소정의 목표 회전수(rpm)까지 가속시킨다(S1).Referring to Figures 2 and 3 in detail with respect to the capacity detection method of the drum washing machine according to the present invention, first, by applying a predetermined DC voltage to the motor 4 before entering the dehydration stroke, the motor rotational speed is determined by a predetermined target rotational speed. Acceleration to (rpm) (S1).

상기 모터 속도가 목표 회전수에 도달하면, 일정 시간동안 모터의 설정 속도와 실제 속도를 비교하면서 제어하는 폐루프(closed loop) 제어 방식에 의해 모터 속도를 정속으로 제어한다(S2).When the motor speed reaches the target rotational speed, the motor speed is controlled at a constant speed by a closed loop control method for controlling while comparing the set speed and the actual speed of the motor for a predetermined time (S2).

일정 시간이 경과하면 모터를 오프시키고, 상기 정속 구간 동안 산출되는 편심값과 모터에 인가된 DC 전압 및 모터의 토오크를 이용하여 미리 프로그램된 포량값 계산식에 의해 포량값을 산출하여 포량을 감지한다(S3). After a certain time has elapsed, the motor is turned off, and the amount of gas is detected by calculating the amount of capacity by using a pre-programmed value calculation formula using the eccentric value calculated during the constant speed section, the DC voltage applied to the motor, and the torque of the motor ( S3).

예를 들어, E.g,

포량값(X) = 정속 구간에서 모터를 구동시키는데 필요한 전류량의 평균값(ipark) + DC 전압 보상값(B) - 편심보상값(C) + a Amount value (X) = average value of the amount of current required to drive the motor in the constant speed section (i park ) + DC voltage compensation value (B)-eccentricity compensation value (C) + a

의 식으로 구할 수 있다. It can be obtained by

여기서, a는 상수로서 실험에 의해 얻어진 값이다. Here, a is a value obtained by experiment as a constant.

상기 DC 전압 보상값(B)는The DC voltage compensation value (B) is

B = (DC 전압 검지값 - b)× t B = (DC voltage detection value-b) × t

의 식으로 얻어질 수 있고, (여기서, b는 상수로서 실험에 의해 얻어진 값이고, t는 정속구간 동안의 시간임)Where b is a value obtained experimentally as a constant and t is the time during the constant speed section.

그리고, 상기 편심보상값(C)는, The eccentricity compensation value C is

C = 정속 구간에서의 편심값 × d (여기서, d는 상수로서 실험에 의해 얻어진 값임) C = Eccentricity value at constant speed interval × d (where d is a value obtained experimentally as a constant)

의 식으로 구할 수 있다. It can be obtained by

상기 포량값 산출시 DC 전압과 토오크값은 비례관계에 있으며, 세탁물이 적을수록 편심이 많이 져 속도의 변화가 커지므로 편심값과 포량값은 반비례 관계에 놓여 있다. The DC voltage and the torque value are proportional to each other when calculating the amount of load. As the amount of laundry is smaller, the amount of eccentricity increases, so that the change in speed increases.

상기와 같이 정속 구간에서 모터를 폐루프(closed loop) 제어 방식에 의해 제어하게 되면, 속도 변화량이 적어 정확한 토오크값과 편심값을 얻을 수 있으며, 따라서 개루프제어에 의해 포량값을 산출할 때보다 정확한 포량값을 산출할 수 있게 되고, 포량값 판정 구간을 더욱 세분화할 수 있게 된다. As described above, when the motor is controlled by the closed loop control method in the constant speed section, the amount of change in speed is small, so that an accurate torque value and an eccentric value can be obtained. Accurate dose values can be calculated, and the dose value determination section can be further subdivided.

이상에서와 같이 본 발명에 따르면, 포량값 판정을 위한 모터 정속 구간에서 모터 속도를 폐루프(closed loop) 방식으로 제어하며 포량값을 산출하므로 정확한 포량값을 산출할 수 있게 되고, 따라서 더욱 정확한 탈수행정의 제어가 이루어질 수 있게 된다. As described above, according to the present invention, since the motor speed is controlled in a closed loop method in the constant speed motor section for the determination of the dose value and the dose value is calculated, an accurate dose value can be calculated, and thus more accurate dehydration. Control of the stroke can be achieved.

Claims (1)

모터를 일정 회전수까지 상승시키는 가속단계;An acceleration step of raising the motor to a predetermined rotation speed; 모터 속도가 일정 회전수에 도달하면 일정 시간(t) 동안 폐(閉)루프(closed loop) 제어를 하면서 모터 속도를 일정한 속도로 유지하는 정속단계;A constant speed step of maintaining the motor speed at a constant speed while maintaining a closed loop control for a predetermined time t when the motor speed reaches a predetermined rotation speed; 상기 모터를 정지시키고, 정속단계에서 산출된 편심값과 모터에 인가된 DC 전압을 인자로 하는 하기의 포량값(X) 계산식,Stopping the motor, the following formula for calculating the amount value (X) of the eccentric value calculated in the constant speed step and the DC voltage applied to the motor as a factor, 포량값(X) = 정속단계에서 모터를 구동시키는데 필요한 전류량의 평균값(ipark) + DC 전압 보상값(B) - 편심보상값(C) + a Amount value (X) = average value of the amount of current required to drive the motor in constant speed stage (i park ) + DC voltage compensation value (B)-eccentricity compensation value (C) + a [여기서, a는 상수이며, [Where a is a constant, DC 전압 보상값(B)=(DC 전압 검지값 - b)× t, (여기서, b는 상수, t는 정속구간 동안의 시간)에 의해 얻어지며, DC voltage compensation value (B) = (DC voltage detection value-b) × t, where b is a constant and t is the time during constant speed section, 편심보상값(C)= 상기 정속단계에서의 편심값 × d, (여기서, d는 상수)] Eccentricity compensation value (C) = eccentricity value x d in the constant speed step, where d is a constant 을 이용하여 포량값을 산출하는 단계를 포함하여 구성된 드럼세탁기의 포량 감지방법.Detecting the amount of capacity of the drum washing machine comprising the step of calculating the value of the carrying amount using.
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