KR0121123B1 - A clothing dryer - Google Patents

A clothing dryer

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Publication number
KR0121123B1
KR0121123B1 KR1019940014465A KR19940014465A KR0121123B1 KR 0121123 B1 KR0121123 B1 KR 0121123B1 KR 1019940014465 A KR1019940014465 A KR 1019940014465A KR 19940014465 A KR19940014465 A KR 19940014465A KR 0121123 B1 KR0121123 B1 KR 0121123B1
Authority
KR
South Korea
Prior art keywords
voltage
load
filter
amount
current
Prior art date
Application number
KR1019940014465A
Other languages
Korean (ko)
Other versions
KR960001316A (en
Inventor
심효선
Original Assignee
구자홍
엘지전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 구자홍, 엘지전자주식회사 filed Critical 구자홍
Priority to KR1019940014465A priority Critical patent/KR0121123B1/en
Publication of KR960001316A publication Critical patent/KR960001316A/en
Application granted granted Critical
Publication of KR0121123B1 publication Critical patent/KR0121123B1/en

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting arrangements
    • 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
    • D06F2103/42—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to filters or pumps
    • 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
    • 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

Abstract

A motor(2), a drum(1) driven by the motor(2) and a heat exchange fan(3) start to rotate at the same time and suck the outer air through an inlet(4), which make a heater(11) generating heat. The outer air sucked by the heat exchange fan(3) circulates along down a circulation path and drys the clothing up inside the drum(1) slowly. Meanwhile, the current that flows down heaters(201,202) and other load(M) are converted into a voltage by a resistor(R5). The converted voltage is divided into a half wave rectifier by a diode(D1) and a capacitor(C1). The divided voltage is converted into light to be output through a light emitting diode(LED1) and at the same time a photo resistor(PT1) is turned on by the light.

Description

의류건조기의 부하전류 및 필터막힘 감지회로Load current and filter clogging detection circuit of clothes dryer

제1도는 종래 의류건조기의 부하전류 및 필터막힘 감지회로도.1 is a circuit diagram of a load current and filter clogging of a conventional clothes dryer.

제2도는 일반적인 의류건조기의 종단면도.2 is a longitudinal sectional view of a general clothes dryer.

제3a,b도는 풍량에 따른 히터의 특성도.3a and 3b is a characteristic view of the heater according to the air volume.

제4도는 본 발명 의류건조기의 부하전류 및 필터막힘 감지회로도.4 is a circuit diagram illustrating a load current and filter clogging of the clothes dryer of the present invention.

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

100 : 전원부 200 : 부하 구동부100: power supply unit 200: load driving unit

300 : 정류부 400 : 부하전류 검출부300: rectifier 400: load current detector

500 : 마이크로 컴퓨터500: microcomputer

본 발명은 의류건조기에 관한 것으로, 특히 부하에 흐르는 전류량 및 필터의 막힘정도를 세밀하고 정확하게 판단할 수 있는 의류건조기의 부하전류 및 필터막힘 감지회로에 관한 것이다.The present invention relates to a clothes dryer, and more particularly, to a load current and a filter clogging detection circuit of a clothes dryer, which can accurately and accurately determine the amount of current flowing through a load and the degree of clogging of a filter.

제1도는 종래 의류건조기의 부하전류 및 필터막힘 감지회로도로서, 이에 도시된 바와 같이 제어신호에 따라 시스템 각부에 전원을 공급하기 위한 전원부(10)와, 제어신호에 따라 부하(21,22,M)를 구동하는 부하 구동부(20)와, 부하(21,22,M)에 흐르는 전류를 그에 따른 전압으로 변환하여 출력하는 트랜스(CT1)와, 저항(R3)과 다이오드(D2)로 이루어져 상기 트랜스(CT1)의 출력전압을 반파 정류하는 반파 정류부(30)와, 저항(R1,R2)과 콘덴서(C1)와 다이오드(D1)와 트랜지스터(Q1)로 이루어져 상기 반파 정류부(30)의 출력전압에 따라 그에 비례하는 전압을 전달하는 부하전류 감지부(40)와, 상기 부하전류 감지부(40)의 출력에 의해 부하에 흐르는 전류 및 필터의 막힘정도를 판단하여 그에따라 시스템을 제어하기 위한 제어신호를 출력하는등 시스템 전체를 총괄제어하는 마이크로 컴퓨터(50)로 구성된다.1 is a circuit diagram for detecting load current and filter clogging of a conventional clothes dryer, as shown in FIG. 1, a power supply unit 10 for supplying power to each part of a system according to a control signal, and loads 21, 22, and M according to a control signal. And a transformer CT1 for converting and outputting a current flowing through the loads 21, 22, and M into voltages corresponding thereto, and a resistor R3 and a diode D2. A half wave rectifier 30 for half-wave rectifying the output voltage of CT1, and resistors R1 and R2, a capacitor C1, a diode D1, and a transistor Q1 to the output voltage of the half wave rectifier 30. Accordingly, the control signal for controlling the system according to the load current detection unit 40 for transmitting a voltage proportional thereto and the output current of the load current detection unit 40 and the degree of blockage of the filter are determined accordingly. Do not control the whole system such as printing It consists of a croissant computer 50.

이와 같이 구성된 종래회로의 작용에 관하여 첨부한 제2도 및 제3도를 참조하여 설명하면 다음과 같다.The operation of the conventional circuit configured as described above will be described with reference to FIGS. 2 and 3.

일반적으로 의류건조기는 제2도에 도시한 바와 같이 전원이 입력되어 의류건조기가 구동되면 먼저 팬(3)이 회전하여 외부의 찬공기와 드럼(1)내부의 더운 공기를 흡입한다. 이에따라 팬(3)을 사이에 두고 열 교환이 이루어져 드럼(1)내부의 습기를 제어하게 된다.Generally, as shown in FIG. 2, when power is input and the clothes dryer is driven, the clothes dryer first rotates the fan 3 to suck outside cold air and hot air inside the drum 1. Accordingly, heat exchange is performed with the fan 3 interposed therebetween to control the moisture in the drum 1.

이때, 드럼(1)내부의 공기는 순환경로를 따라 순환하게 되며 필터의 막힘정도에 따라 순환되는 공기의 양이 달라지게 된다. 즉, 필터의 막힘이 적을때는 흐르는 공기의 양이 많고 필터의 막힘이 많을때는 흐르는 공기의 양이 적다.At this time, the air in the drum 1 is circulated along the circulation path and the amount of air circulated depends on the degree of clogging of the filter. That is, when the blockage of the filter is small, the amount of flowing air is large, and when the blockage of the filter is large, the amount of flowing air is small.

이때, 히터(11)는 흐르는 공기의 양에 따라 발열량이 달라지는데 이는 히터(11)에 부착된 저항이 온도에 따라 그 저항값이 달라지기 때문이다. 즉, 히터(11)에 부착된 저항은 제3도의 (a)(b)에 도시한 바와 같이 온도가 높으면 저항값이 커지고 온도가 낮아지면 저항값도 같이 낮아지는 특성이 있다. 따라서 흐르는 공기의 양이 적어 온도가 높아지면 저항값이 커지고 이에따라 히터(11)에 흐르는 전류의 량이 적어져서 히터(11)의 발열량은 감소한다.At this time, the heat generating amount of the heater 11 is changed according to the amount of air flowing, because the resistance value is attached to the heater 11 varies depending on the temperature. That is, as shown in (a) and (b) of FIG. 3, the resistance attached to the heater 11 has a characteristic in that, when the temperature is high, the resistance value increases, and when the temperature decreases, the resistance value also decreases. Therefore, when the amount of air flowing is small and the temperature increases, the resistance value increases, and accordingly, the amount of current flowing through the heater 11 decreases, so that the heat generation amount of the heater 11 decreases.

반대로 흐르는 공기의 양이 많아서 온도가 낮아지면 저항값이 작아지고 이에따라 히터(11)에 흐르는 전류의 양이 많아져서 히터의 발열량은 증가한다.On the contrary, when the temperature is lowered due to a large amount of air flowing, the resistance value decreases. Accordingly, the amount of current flowing through the heater 11 increases, thereby increasing the amount of heat generated by the heater.

한편, 모터(M) 및 히터(21,22)등 부하에 흐르는 전류는 트랜스(CT1)의 1차측을 흐르는데 이로인해 그 트랜스(CT1)의 2차측에는 1차측에 흐르는 부하전류에 비례하는 유기전압이 발생한다. 그 발생한 전압은 저항(R3)을 통하고 다이오드(D2)를 통해 반파정류되어 트랜지스터(Q1)의 베이스에 인가된다.On the other hand, the current flowing to the load such as the motor M and the heaters 21 and 22 flows through the primary side of the transformer CT1, so that the induced voltage is proportional to the load current flowing to the primary side of the transformer CT1. This happens. The generated voltage is half-wave rectified through the resistor R3 and through the diode D2 and applied to the base of the transistor Q1.

상기 반파정류된 전압을 베이스에 인가받은 트랜지스터(Q1)는 그에따라 온되는데 입력되는 전압의 크기에 따라 턴온량이 달라진다. 이로인해 전원전압(VCC)이 트랜지스터(Q1)를 통하여 콘덴서(C1)를 통해 충전된다.The transistor Q1 receiving the half-wave rectified voltage to the base is turned on accordingly, and the turn-on amount varies according to the magnitude of the input voltage. As a result, the power supply voltage VCC is charged through the capacitor C1 through the transistor Q1.

마이크로 컴퓨터(50)는 상기 충전된 전압의 크기에 따라 각 부하에 흐르는 전류량을 판단하고 또한 필터의 막힘정도를 판단하여 그에따른 제어를 한다.The microcomputer 50 determines the amount of current flowing through each load according to the magnitude of the charged voltage, and also determines the degree of clogging of the filter and controls accordingly.

이상에서 설명한 바와 같이 종래에는 부하에 흐르는 전류의 량을 트랜스를 이용하여 변환한 전압으로 판단하였는데, 이 트랜스를 이용할 경우 트랜스의 2차측에 감긴 코일의 수 및 밀도에 따라 유기전압의 크기가 달라지기 때문에 오차가 크며, 또한 트랜스의 특성상 너무 낮은 전류가 흐를시에는 유기전압이 발생하지 않기 때문에 조립시 단선등의 문제가 있고 아울러 전류치가 낮은 모터의 경우에는 구동여부를 판단할 수 없는 문제점이 있었다.As described above, in the related art, the amount of current flowing through a load was determined as a voltage converted by using a transformer. When using this transformer, the magnitude of the induced voltage varies depending on the number and density of coils wound on the secondary side of the transformer. Therefore, the error is large, and because of the characteristics of the transformer, when too low current flows, no induced voltage occurs, so there is a problem such as disconnection during assembly, and in the case of a motor with a low current value, it is not possible to determine whether to drive.

본 발명의 목적은 이러한 종래의 문제점을 해결하기 위해 부하에 흐르는 전류의 양과 필터의 막힘정도를 세밀하고 정확하게 판단하여 필터의 교체시기를 정확히 알 수 있는 의류건조기의 전류 및 필터 감지회로를 창안한 것이다.An object of the present invention is to create a current and filter detection circuit of the clothes dryer that can accurately know the replacement time of the filter by judging precisely and accurately the amount of current flowing through the load and the degree of clogging of the filter in order to solve such a conventional problem. .

상기 본 발명의 목적을 해결하기 위한 의류건조기의 전류 및 필터 감지회로는 부하에 흐르는 전류를 전압으로 변환하기 위한 저항과, 상기 저항을 통해 변환된 전압을 정류하는 정류부와, 상기 정류부의 출력에 비례하는 전압을 전달하는 부하전류 검출부와, 상기 부하전류 검출부의 출력에 의해 각 부하에 흐르는 전류 및 필터의 막힘정도를 판단하여 필터교체 시기를 알리기 위한 제어신호를 출력하는등 시스템을 총괄제어하는 마이크로 컴퓨터로 구성한다.The current and filter detection circuit of the clothes dryer for solving the object of the present invention is a resistor for converting the current flowing in the load into a voltage, a rectifier for rectifying the voltage converted through the resistance, and proportional to the output of the rectifier A microcomputer for overall control of the system, such as a load current detection unit for transmitting a voltage to be measured, and a control signal for notifying the filter replacement time by determining the current flowing through each load and the degree of blockage of the filter by the output of the load current detection unit. It consists of.

이하, 본 발명의 일 실시예를 첨부한 제4도를 참조하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail with reference to Figure 4 attached to an embodiment of the present invention.

제4도는 본 발명의 일실시예를 나타낸 회로도로서, 이에 도시한 바와 같이 제어신호에 따라 시스템 각부에 전원을 공급하기 위한 전원부(100)와, 제어신호에 따라 부하를 구동하기 위한 부하구동부(200)와, 부하에 흐르는 전류를 전압으로 변환하기 위한 저항(R5)과, 저항(R3,R4)과 콘덴서(C1)와 다이오드(D1)로 이루어져 상기 저항(R5)을 통해 변환된 전압을 반파정류하고 평활하여 출력하는 정류부(300)와, 상기 정류부(300)의 출력에 비례하는 전압을 전달하는 부하전류 검출부(400)와, 상기 부하전류 검출부(400)의 출력에 따라 각 부하에 흐르는 전류 및 필터의 막힘을 감지하여 필터의 교체시기를 알리기 위한 제어신호를 출력하는등 시스템 전체를 총괄제어하는 마이크로 컴퓨터(500)로 구성한다.4 is a circuit diagram illustrating an embodiment of the present invention. As shown in FIG. 4, a power supply unit 100 for supplying power to each system part according to a control signal, and a load driver 200 for driving a load according to a control signal ) And a resistor (R5) for converting a current flowing in the load into a voltage, and resistors (R3, R4), a capacitor (C1), and a diode (D1), and half-wave rectification of the voltage converted through the resistor (R5). And a rectifier 300 for smoothly outputting the load, a load current detector 400 transmitting a voltage proportional to the output of the rectifier 300, a current flowing through each load according to the output of the load current detector 400, and The microcomputer 500 collectively controls the entire system such as detecting a blockage of the filter and outputting a control signal for informing the filter replacement time.

이와 같이 구성한 본 발명의 작용 및 효과에 관하여 상세히 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above in detail.

전원이 입력되어 의류건조기가 구동되면 제2도에 도시한 바와 같이 먼저 모터(2) 및 이에의해 구동하는 드럼(1)과 열교환팬(3)이 동시에 회전을 시작하여 외부의 공기를 흡기구(4)를 통해 흡입하고 아울러 히터(11)가 발열하게 된다.When power is input and the clothes dryer is driven, as shown in FIG. 2, first, the motor 2 and the drum 1 driven therefrom and the heat exchange fan 3 start to rotate at the same time to absorb external air. Inhaled through and heat the heater (11).

이때, 상기 열교환팬(3)에 의해 흡입된 외부의 공기는 히터(11)를 통해 순환경로를 따라 순환하며 드럼(1)내의 의류를 서서히 건조시키게 되는데, 필터의 막힘정도에 따라 외부에서 흡입되는 공기의 양이 달라지게 된다.At this time, the outside air sucked by the heat exchange fan (3) is circulated along the circulation path through the heater 11 and gradually drying the clothes in the drum (1), which is sucked from the outside according to the degree of clogging of the filter The amount of air will vary.

그런데 상기 히터(11)는 온도에 따라 발열량이 달라지는 특성이 있다. 즉, 필터가 많이 막혀 흡입되는 공기의 양이 적으면 히터(11) 주위의 온도가 높아지고 온도가 높으면 히터(11)의 저항값이 높아지게 되어 전류가 적게 흐르고 이로인해 발열량이 작아진다.By the way, the heater 11 has a characteristic that the calorific value varies depending on the temperature. That is, if the amount of air sucked due to the large number of filters is small, the temperature around the heater 11 is high, and if the temperature is high, the resistance value of the heater 11 is high, so that a small amount of current flows, thereby reducing the amount of heat generated.

반대로 필터의 막힘이 적어 흡입되는 공기의 양이 많으면 히터(11) 주위의 온도가 낮아지고 온도가 낮아지면 저항값이 작아지게 되어 전류가 많이 흐르고 이로인해 발열량이 많아지는 특성이 있다.On the contrary, if the amount of air sucked due to the small clogging of the filter is low, the temperature around the heater 11 is lowered, and if the temperature is lowered, the resistance value is decreased, so that a large amount of current flows, thereby increasing the amount of heat generated.

다시말하면 필터의 막힘정도에 따라 히터(11)에 흐르는 전류가 달라지기 때문에 히터(11) 즉, 부하에 흐르는 전류의 양을 검출하면 필터의 막힘정도를 알 수 있다.In other words, since the current flowing through the heater 11 varies depending on the degree of clogging of the filter, the degree of clogging of the filter can be known by detecting the amount of current flowing through the heater 11, that is, the load.

한편, 히터(201,202) 및 기타 부하(M)에 흐르는 전류는 저항(R5)에 의해 그대로 전압으로 변환되고 그 변환된 전압은 다이오드(D1)와 콘덴서(C1)에 의해 반파정류 및 평활된다.On the other hand, the current flowing through the heaters 201 and 202 and the other load M is converted into voltage as it is by the resistor R5, and the converted voltage is half-wave rectified and smoothed by the diode D1 and the capacitor C1.

상기 평활된 전압은 발광 다이오드(LED1)를 통해 그 전압만큼 빛으로 변환되어 출력되고 그 빛에 의해 포토 트랜지스터(PT1)가 턴온되는데 빛의 양에 따라 턴온량이 달라진다.The smoothed voltage is converted into light by the voltage through the light emitting diode LED1 and is outputted, and the photo transistor PT1 is turned on by the light, and the turn-on amount varies depending on the amount of light.

상기 포토 트랜지스터(PT1)의 턴온량에 따라 전원전압(VCC)이 저항(R1,R2)에 의해 분압되어 마이크로 컴퓨터(500)에 인가되고 이에 따라 마이크로 컴퓨터(500)는 입력된 전압에 따라 각 부하에 흐르는 전류 및 필터의 막힘정도를 판단하여 그에따라 필터 교체시기를 알리기 위한 제어신호를 출력하는등 시스템을 제어한다.According to the turn-on amount of the photo transistor PT1, the power supply voltage VCC is divided by the resistors R1 and R2 and applied to the microcomputer 500. Accordingly, the microcomputer 500 loads each load according to the input voltage. The system is controlled by judging the current flowing through the filter and the degree of blockage of the filter and outputting a control signal to inform the filter replacement time accordingly.

이상에서 상세히 설명한 바와 같이 본 발명은 저항을 이용하여 부하에 흐르는 전류를 오차없이 그대로 전압으로 변환함으로써 작은 전류도 감지할 수 있어 정확한 전류감지가 가능하고 조립하는데 있어서도 불량을 없앨 수 있으며 이로인해 필터의 막힘정도를 세밀히 판단하여 그 교체시기를 정확히 알 수 있는 효과가 있다.As described in detail above, the present invention can detect a small current by converting the current flowing through the load into a voltage as it is without error, thereby enabling accurate current sensing and eliminating defects in assembling. The degree of clogging is judged in detail, and the replacement time is effective.

Claims (1)

부하에 흐르는 전류를 전압으로 변환하기 위한 저항과, 상기 저항을 통해 변환된 전압을 정류하는 정류부와, 상기 정류부의 출력에 비례하는 전압을 전달하는 부하전류 검출부와, 상기 부하전류 검출부의 출력에 의해 각 부하에 흐르는 전류 및 필터의 막힘정도를 판단하여 필터교체 시기를 알리기 위한 제어신호를 출력하는 등 시스템을 총괄제어하는 마이크로 컴퓨터로 구성한 것을 특징으로 하는 의류건조기의 부하전류 및 필터막힘 감지회로.A resistor for converting a current flowing in the load into a voltage, a rectifier for rectifying the voltage converted through the resistor, a load current detector for transmitting a voltage proportional to the output of the rectifier, and an output of the load current detector. A load current and filter clogging detection circuit of a clothes dryer, comprising: a microcomputer for overall control of the system, such as determining a current flowing through each load and a degree of clogging of the filter and outputting a control signal for notifying a filter replacement time.
KR1019940014465A 1994-06-23 1994-06-23 A clothing dryer KR0121123B1 (en)

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KR1019940014465A KR0121123B1 (en) 1994-06-23 1994-06-23 A clothing dryer

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KR1019940014465A KR0121123B1 (en) 1994-06-23 1994-06-23 A clothing dryer

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KR960001316A KR960001316A (en) 1996-01-25
KR0121123B1 true KR0121123B1 (en) 1997-11-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100652782B1 (en) * 2001-01-10 2006-12-01 주식회사 엘지이아이 Dryer with a filter sensing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100652782B1 (en) * 2001-01-10 2006-12-01 주식회사 엘지이아이 Dryer with a filter sensing system

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