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KR960012514B1 - A filter closed detectable apparatus of dryer - Google Patents

A filter closed detectable apparatus of dryer Download PDF

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Publication number
KR960012514B1
KR960012514B1 KR1019930018834A KR930018834A KR960012514B1 KR 960012514 B1 KR960012514 B1 KR 960012514B1 KR 1019930018834 A KR1019930018834 A KR 1019930018834A KR 930018834 A KR930018834 A KR 930018834A KR 960012514 B1 KR960012514 B1 KR 960012514B1
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KR
South Korea
Prior art keywords
filter
rotating
unit
air
light
Prior art date
Application number
KR1019930018834A
Other languages
Korean (ko)
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KR950008839A (en
Inventor
심효선
Original Assignee
엘지전자 주식회사
구자홍
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Application filed by 엘지전자 주식회사, 구자홍 filed Critical 엘지전자 주식회사
Priority to KR1019930018834A priority Critical patent/KR960012514B1/en
Publication of KR950008839A publication Critical patent/KR950008839A/en
Application granted granted Critical
Publication of KR960012514B1 publication Critical patent/KR960012514B1/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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The apparatus informs the time to clean the filter by sensing the air flow through the filter using an optical sensor. The apparatus comprises: a rotating device(20), whose speed is propotinal to the air flow through the filter and which has several holes on it; a light emitting device(21) for making light pass through the holes; a light collecting device(22) for capturing the light passing through the holes; a pulse generator(23) for generating pulses according to the output from the collector; a light emitting diode(24) for displaying the state of the filter; and a microprocessor(25) for dicriminating clogging of the filter(5) by counting pulse generated and for flikering or turning on LED when the filter is clogged.

Description

빨래 건조기의 필터막힘감지장치Filter clogging detection device of laundry dryer

제1도는 종래 기술의 빨래 건조기를 나타낸 측단면도.1 is a side cross-sectional view showing a laundry dryer of the prior art.

제2도는 공기의 양과 PTC 히터의 소비전력과의 상관 관계특성도.2 is a correlation characteristic diagram between the amount of air and the power consumption of a PTC heater.

제3도는 종래기술의 필터막힘감지회로를 나타낸 회로구성도.3 is a circuit configuration diagram showing a filter clogging detection circuit according to the prior art.

제4도는 및 제5도는 종래 기술의 펄터막힘감지를 위한 변류기의 특성도.4 and 5 are characteristic diagrams of current transformers for detecting pulverization in the prior art.

제6도는 상기 제3도의 각부파형도.6 is an angular waveform diagram of FIG.

제7도는 종래 기술의 필터막힘감지를 위한 제어 흐름도.7 is a control flowchart for detecting filter clogging in the prior art.

제8도는 본 발명의 실시예를 나타낸 회로구성도.8 is a circuit diagram showing an embodiment of the present invention.

제9도는 본 발명에 작용되는 회전부의 구성단면도.Figure 9 is a cross-sectional view of the configuration of the rotating unit acting on the present invention.

제10도는 본 발명의 각부파형도.10 is an angle waveform diagram of the present invention.

제11도는 본 발명의 필터막힘감지를 위한 제어흐름도.11 is a control flow chart for detecting the filter clogging of the present invention.

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

5 : 필터20 : 회전부5: filter 20: rotating part

21 : 발광부22 : 수광부21 light emitting unit 22 light receiving unit

23 : 파형발생부24 : LED23: waveform generator 24: LED

25 : 마이콤20a : 회전홀25: micom 20a: rotating hole

20b : 회전판20c : 회전축20b: rotating plate 20c: rotating shaft

20d : 회전날개PD1: 발광 다이오드20d: Rotating blade PD 1 : Light emitting diode

PT1: 수광트랜지스터T2: 트랜지스터PT 1 : Light receiving transistor T 2 : Transistor

본 발명은 빨래 건조기에 있어서, 특히 건조실 내부의 공기를 외부로 유출시키면서 먼지등을 여과하는 필터의 막힘정도를 판별하는 필터막힘 감지장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter clogging detection apparatus for determining a clogging degree of a filter for filtering dust and the like, in particular, while outflowing air inside a drying chamber to the outside.

제1도는 종래 기술의 빨래 건조기를 나타낸 단면도로써, 모터(1)의 구동에 의해 팬(fan)(2)을 회전시킴으로써 건조기 외부의 공기를 흡입하고 흡입실 공기를 PTC 히터(3)로 가열하여 공기의 온도를 높인후 건조실(4)에 더운 공기를 제공한다.FIG. 1 is a cross-sectional view showing a conventional laundry dryer, which rotates a fan 2 by driving a motor 1 to suck air outside the dryer and heat the suction chamber air with a PTC heater 3. After raising the temperature of the air, hot air is supplied to the drying chamber 4.

건조실(4)로 유입된 공기는 빨래를 건조시키면서 빨래의 물분자를 실어 필터(5)를 통과하는데 필터(5)에 의해 건조실(4)의 먼지등이 여과되면서 통과한다.The air introduced into the drying chamber 4 carries the water molecules of the laundry while drying the laundry, and passes through the filter 5 while the dust of the drying chamber 4 is filtered by the filter 5.

건조실(4) 외부로 유출된 공기와 물분자는 건조실(4) 외부의 찬공기로 인하여 물분자가 물방울로 되어 배수구(6)로 배수되는 한편 공기는 다시 PTC 히터(3)에 의해 가열된 후 건조실(4)에 유입된다.The air and water molecules which flowed out of the drying chamber 4 are drained by the cold air outside the drying chamber 4 to the drain port 6 as water droplets, while the air is heated by the PTC heater 3 again. It flows into the drying chamber 4.

이때, 제2도와 같이 공기의 양과 PTC 히터(3)의 소비전력이 비례하므로 상기 필터(5)에 먼지등이 많아 공기의 유출량이 적어지면 건조실(4)에 유입되는 공기량이 적어지므로 소비전력도 적어지게 된다.At this time, since the amount of air and power consumption of the PTC heater 3 are proportional to each other as shown in FIG. 2, when the amount of air is reduced due to a large amount of dust and the like in the filter 5, the amount of air flowing into the drying chamber 4 decreases. Will be less.

따라서 종래에는 상기와 같은 원리를 이용하여 필터(5)의 막힘상태를 감지하였는바, 이에 대해 제3도를 참조하여 설명하면 다음과 같다.Therefore, in the related art, the blockage state of the filter 5 is detected using the same principle as above, which will be described below with reference to FIG. 3.

먼저, 부하구동부(9)는 마이콤(10)의 제어를 받아 상기 PTC 히터(3a, 3b)와 모터(11) 및 자동 오프스위치(off switch)(12)를 구동하는데 상기 필터(5)의 막힘이 많을수록 상기 PTC 히터(3a, 3b)의 소비전력이 줄어들어 부하구동부(9)에 인가되는 전류는 감소하게 된다.First, the load driver 9 drives the PTC heaters 3a and 3b, the motor 11, and the automatic off switch 12 under the control of the microcomputer 10, and the filter 5 is blocked. As the number increases, the power consumption of the PTC heaters 3a and 3b decreases, so that the current applied to the load driver 9 decreases.

따라서, 부하구동부(9)의 입력단에 연결된 변기(13)의 1차측 전류가 감소하게 되고(제4도, 제5도 참조), 변류기(13)의 2차측 AC 전류도 감소하며 변류기(13)의 2차측 코일에 유기된 AC 전류는 저항(R1)과 다이오드(D1)를 통과하여 반파정류된다(제6도(a)).Accordingly, the primary side current of the toilet 13 connected to the input terminal of the load driver 9 is reduced (see FIGS. 4 and 5), the secondary AC current of the current transformer 13 is also reduced and the current transformer 13 is reduced. The AC current induced in the secondary coil of is half-wave rectified through the resistor R 1 and the diode D 1 (Fig. 6 (a)).

반파정류된 전압은 트랜지스터(T1)의 베이스단에 인가되어 트랜지스터(T1)의 턴온(turn on) 전압 이상이 되면(제6도(b)) 트랜지스터(T1)는 턴온되고, 트랜지스터(T1)의 에미터단 전압은 저항(R2)과 콘덴서(C1)에 의해 평활되어 마이콤(10)에 인가된다(제6도(c)).Half-wave rectified voltage is applied to the base of the transistor (T 1) when the turn-on (turn on) the voltage over the transistor (T 1) (Figure 6 (b)) the transistor (T 1) is turned on, transistor ( The emitter stage voltage of T 1 ) is smoothed by the resistor R 2 and the capacitor C 1 and applied to the microcomputer 10 (FIG. 6C).

마이콤(11)은 상기 콘덴서(C1)의 양단 전압을 리드(read)하여 (제7도, 100) 콘덴서(C1)의 양단전압이 일정치(α) 이하이면(제7도, 101) 필터(5)의 막힘을 표시해준다(제7도 102).The microcomputer 11 reads the voltage at both ends of the capacitor C 1 (FIG. 7, 100) when the voltage at both ends of the capacitor C 1 is equal to or less than a predetermined value α (FIG. 7, 101). The blockage of the filter 5 is indicated (FIG. 7 102).

즉, 필터(5)가 막히게 되면 트랜지스터(T1)의 베이스단 전압이 하강하여 상기 콘덴서(C1)의 양단 전압도 하강하므로 마이콤(10)은 콘덴서(C1)의 양단전압을 리드(read)함으로써 필터(5)의 막힘 상태를 감지할 수 있게 되는 것이다.That is, when the filter 5 is blocked, the voltage at the base terminal of the transistor T 1 decreases and the voltage at both ends of the capacitor C 1 also decreases, so that the microcomputer 10 reads the voltage at both ends of the capacitor C 1 . By this, the clogging state of the filter 5 can be detected.

도면의 미설명 부호인 R2, R3는 저항을 나타내고, D2는 다이오드를 나타낸다. 그러나, 상기 변류기(13)의 특성을 나타낸 제4도 및 제5도에서 알 수 있듯이 부하구동부(9)에 인가되는 전류가 4A 이상되어야 상기 콘덴서(C1)에 전압이 유기된다.In the drawings, reference numerals R 2 and R 3 represent a resistor, and D 2 represents a diode. However, as shown in FIGS. 4 and 5 showing the characteristics of the current transformer 13, the voltage is induced in the capacitor C 1 only when the current applied to the load driver 9 is 4A or more.

따라서 PTC 히터(3a,3b)를 오프시키고 모터(1)만 운전할 경우에는 전류가 작아서 상기 콘덴서(C1)에 유기되는 전압도 없어 필터(5)의 막힘 감지가 불가능하며 부하구동부(10)에 인가되는 전류에 의해서도 콘덴서(C1)에 유기되는 전압도 틀리므로 히터(3a,3b)를 하나만 온하였을때는 필터막힘감지를 생략하던지, 또는 다른 프로그램 루틴(program routine)을 수행해서 감지해야 하는 번거로움이 있었다.Therefore, when the PTC heaters 3a and 3b are turned off and only the motor 1 is operated, since the current is small and there is no voltage induced in the condenser C 1 , clogging of the filter 5 is impossible and the load driving unit 10 cannot be detected. Since the voltage induced in the capacitor C 1 is also different depending on the applied current, when only one heater 3a or 3b is turned on, the filter clogging detection may be omitted or another program routine may be used to detect the problem. There was a feeling.

또한 주위의 실내온도차에 따라 그 값이 심하게 변하여 정확한 감지가 불가능하고 필터가 막힘 상태에서 운전을 하면 건조 시간이 길어짐으로써 히터를 충분히 활용하지 못하는 문제점이 있었다.In addition, since the value is severely changed depending on the ambient temperature difference, there is a problem in that the heater cannot be fully utilized because the drying time becomes longer when the filter is blocked and the operation is performed when the filter is blocked.

본 발명은 상기 문제점을 해결하기 위하여 안출한 것으로, 광센서와 스펙트럼의 원리를 이용한 회전판을 사용하여 필터를 통과한 풍량에 따라 세분화되고 정확한 필터막힘감지로 필터청소시기를 정확하게 알려줄 수 있는 필터막힘감지장치를 제공함에 그목적이 있다.The present invention has been made in order to solve the above problems, it is subdivided according to the amount of air passing through the filter using the optical sensor and the rotating plate using the principle of the filter clogging detection can accurately tell the filter cleaning time by the accurate filter clogging detection The purpose is to provide a device.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

제8도는 본 발명의 실시예를 나타낸 회로 구성도로써, 건조기의 공기 유통 경로상에 설치되어 상기 필터(5)를 통과한 풍량에 비레한 속도로 회전하여 회전홀(20a)이 형성된 회전부(20), 상기 회전부(20)의 일측에 설치되어 발광한 빛이 회전홀(20a)을 통과하도록 한 발광부(21), 상기 회전부(20)의 타측에 설치되어 상기 회전홀(20a)을 통과한 빛을 수광하는 수광부(22), 상기 수광부(22)의 출력에 따라 펄스를 발생하는 파형발생부(23), 필터(5)의 막힘 정도를 사용자에게 알려주는 LED(Light Emitted Diode)(24), 상기 파형발생부(23)에서 출력한 펄스수를 카운트하여 풍량을 검출하여 필터(5)의 막힘정도를 판별한 후 필터(5)가 일정상태이상 막히면 상기 LED(24)를 점등하거나 점멸하는 마이콤(25)으로 구성한다.8 is a circuit diagram showing an embodiment of the present invention, the rotary part 20 is provided on the air flow path of the dryer and rotates at a speed that is proportional to the amount of air passing through the filter 5 to form a rotating hole 20a. ), The light emitting unit 21 is installed on one side of the rotating unit 20 so that the light emitted passes through the rotating hole 20a, and the other side of the rotating unit 20 is passed through the rotating hole 20a. Light-receiving unit 22 for receiving light, the waveform generator 23 for generating a pulse according to the output of the light-receiving unit 22, and an LED (Light Emitted Diode) 24 for informing the user of the degree of blockage of the filter 5 When the number of pulses output from the waveform generator 23 is counted to detect the air flow rate to determine the degree of clogging of the filter 5, when the filter 5 is blocked for a predetermined state, the LED 24 is turned on or flashes. It consists of the microcomputer 25.

이때, 상기 회전부(20)는 상기 필터(5)를 통과한 풍량에 의해 회전하며 상기 회전홀(20a)이 형성된 회전판(20b), 상기 회전판(20b)을 지지하기 위한 회전축(20c), 상기 회전판(20b)에 부착되어 공기의 저항을 받는 회전날개(20d)로 구성되고(제9도 참조), 상기 발광부(21)는 저항(R10)과 발광 다이오드(PD1)로 구성되며, 상기 수광부(22)는 저항(R1)과 수광트랜지스터(PT1)로 구성된다.At this time, the rotating unit 20 is rotated by the amount of air passing through the filter 5, the rotating plate 20b having the rotating hole 20a, the rotating shaft 20c for supporting the rotating plate 20b, the rotating plate It is composed of a rotary blade (20d) attached to the (20b) to receive the resistance of the air (see Fig. 9), the light emitting portion 21 is composed of a resistor (R 10 ) and a light emitting diode (PD 1 ), The light receiving unit 22 is composed of a resistor R 1 and a light receiving transistor PT 1 .

또한 상기 펄스발생부(22)는 상기 수광트랜지스터(PT1)의 콜렉터단에 일측이 연결된 저항(R12), 상기 저항(R12)의 타측에 베이스단이 연결되고 상기 마이콤(25)에 콜렉터단이 연결된 트랜지스터(T2), 상기 트랜지스터(T2)의 베이스단과 에미터단 사이에 연결된 저항(R13), 및 상기 트랜지스터(T1)의 콜렉터 저항(R14)으로 구성된다.In addition, the pulse generator 22 has a resistor (R 12 ), one end of which is connected to the collector terminal of the light receiving transistor (PT 1 ), a base of which is connected to the other side of the resistor (R 12 ), and a collector to the microcomputer (25). A transistor (T 2 ) having a stage connected thereto, a resistor (R 13 ) connected between a base terminal and an emitter terminal of the transistor (T 2 ), and a collector resistor (R 14 ) of the transistor (T 1 ).

상기와 같이 구성된 본 발명의 실시예에 대한 동작 설명은 다음과 같다.The operation description of the embodiment of the present invention configured as described above is as follows.

상기 필터(4)를 통과한 공기는 공기 유통경로를 통해 상기 PTC 히터(3)로 이동하면서 그 사이에 설치된 회전부(20)를 통과하게 된다.The air passing through the filter 4 passes through the rotating part 20 provided therebetween while moving to the PTC heater 3 through an air flow path.

따라서 풍량에 따라 회전날개(20d)가 회전하게 되고 회전판(20b)도 회전하게 된다. 상기 발광부(21)의 발광다이오드(PD1)에서 발광한 빛은 상기 회전판(20b)의 회전홈(20a)을 통과하여 수광트랜지스터(PT1)에 인가되는데, 회전판(20b)이 회전하기 때문에 상기 수광트랜지스터(PT1)는 빛을 주기적으로 수광하게 되어 수광트랜지스터(PT1)의 콜렉터단에는 제10도(a)와 같이 주기적인 펄스가 발생하게 된다.Therefore, the rotating blade 20d rotates according to the air volume, and the rotating plate 20b also rotates. The light emitted from the light emitting diode PD 1 of the light emitting part 21 is applied to the light receiving transistor PT 1 through the rotating groove 20a of the rotating plate 20b, because the rotating plate 20b rotates. The light receiving transistor PT 1 receives light periodically so that a periodic pulse is generated at the collector end of the light receiving transistor PT 1 as shown in FIG.

이때, 필터(4)의 막힘상태가 많아지면 공기 유통경로상의 풍량의 감소하고 필터(4)의 막힘상태가 적으면 공기 유통경로상의 풍량이 증가함으로, 상기 회전판(20b)의 회전속도가 풍량에 따라 증, 감하게 되고, 풍량이 증가하면 상기 수광트랜지스터(PT1)의 콜렉터단의 초당 펄스수도 증가하여, 풍량이 감소하면 수광트랜지스터(PT1)이 콜렉터단의 초당 펄스수로 감소하게 된다.At this time, if the blocked state of the filter 4 increases, the amount of air in the air flow path decreases. If the blocked state of the filter 4 decreases, the air volume in the air flow path increases, so that the rotational speed of the rotating plate 20b is increased in the air volume. As the air volume increases, the number of pulses per second of the collector stage of the light receiving transistor PT 1 also increases, and when the air volume decreases, the light receiving transistor PT 1 decreases to the number of pulses per second of the collector stage.

상기 수광트랜지스터(PT1)의 콜렉터단 전압은 상기 트랜지스터(T2)의 베이스단에 인가되는데, 상기 수광트랜지스터(PT1)의 콜렉터단 전압이 제10도(a)와 같이 변화하므로 상기 트랜지스터(T2)의 콜렉터단은 제10도(b)와 같은 펄스를 출력하게 된다.The transistor, so the collector terminal voltage of the light-receiving transistor (PT 1) has a collector terminal voltage is the 10 degree changes as shown in (a) of the light-receiving transistor (PT 1) there is applied to the base terminal of said transistor (T 2) ( The collector stage of T 2 ) outputs a pulse as shown in FIG.

즉, 제10도(a)와 같은 파형의 전압이 트랜지스터(T2)의 베이스단에 인가되면 상기 트랜지스터(T2)의 콜렉터단에는 제10도(a)의 파형이 반전된 신호를 발생하게 되는 것이다.That is, the 10 ° is applied to the base of (a) the transistor (T 2) the voltage of the waveform, such as the collector terminal of the transistor (T 2) is generated in the signal waveform is inverted in the 10th degree (a) Will be.

상기 마이콤(25)은 상기 트랜지스터(T2)의 콜렉터단 출력 펄스수를 카운트(count)하여 차운트수로써 풍량을 감지하는데, 풍량이 많으면, 즉 필터(5)의 막힘정도가 적으면 초당 펄스수는 많게되고, 풍량이 적으면, 즉 필터(5)의 막힘정도가 심하면 초당 펄스수는 적게 되는 것이다.The microcomputer 25 counts the number of output pulses of the collector stage of the transistor T 2 and detects the amount of wind as a count. If the amount of air is large, that is, the degree of blockage of the filter 5 is small, the number of pulses per second Is large, and if the air volume is small, that is, if the degree of clogging of the filter 5 is severe, the number of pulses per second is small.

따라서, 상기 마이콤(25)는 초당 펄스수를 계산하여(제11도, 200), 펄스수가 제 1 기준치(y)를 초과하면(제11도, 201), 상기 필터(5)가 약간 막힌것으로 간주하여 LED(24)를 점등시키고(제11도, 202), 제 2 기준치(z)를 초과하면(제11도, 203), 상기 필터(5)가 매우심하게 막힌것으로 간주하여 LED(24)를 점멸시킨다(제11도, 204).Therefore, the microcomputer 25 calculates the number of pulses per second (11, 200), and if the number of pulses exceeds the first reference value y (11, 201), the filter 5 is slightly clogged. If the LED 24 is turned on (Fig. 11, 202) and the second reference value z is exceeded (Fig. 11, 203), the filter 5 is considered to be very clogged and the LED 24 Flashes (FIG. 11, 204).

상기한 바와 같이 필터를 통과한 풍량에 따라 필터의 막힘정도를 직접적으로 측정해냄으로써, 주위온도등의 변화에 영향받지 않아 필터의 막힘상태를 정확히 측정할 수 있으며, 사용자에게 필터 청소시기를 정확히 알려주어 히터를 효과적으로 활용함으로써 건조시간을 단축시킬 수 있는 효과가 있다.As described above, by directly measuring the degree of clogging of the filter according to the amount of air passing through the filter, it is possible to accurately measure the state of clogging of the filter without being affected by changes in the ambient temperature, and to inform the user exactly when to clean the filter. Given the effective use of the heater has an effect that can shorten the drying time.

Claims (4)

건조실의 공기를 정화하여 유출하는 필터(5), 건조기의 공기 유통 경로상에 설치되어 상기 필터(5)를 통과한 풍량에 의해 회전하며 회전홀(20a)을 구비하여 구성된 회전부(20), 상기 회전부(20)의 일측에 설치되어 발광한 빛이 회전홀(20a)을 통과하도록 한 발광부(21), 상기 회전부(20)의 타측에 설치되어 상기 회전홀을 통과할 빛을 수광하는 수광부(22), 상기 수광부(22)의 출력에 따라 펄스를 발생하는 파형발생부(23), 필터(5)의 막힘정도를 사용자에게 알려주는 LED(24), 상기 파형발생부(23)에서 출력한 펄스수를 카운트하여 풍량을 검출한 후 필터(5)의 막힘정도를 판별하여 LED(24)의 온, 오프를 제어하는 마이콤(25)으로 구성함을 특징으로 하는 빨래건조기의 필터막힘감지장치.Filter 5 for purifying the air in the drying chamber and flows out, the rotary unit 20 is provided on the air flow path of the dryer rotated by the amount of air passing through the filter 5 and provided with a rotating hole (20a), the The light emitting unit 21 installed at one side of the rotating unit 20 to allow the emitted light to pass through the rotating hole 20a, and the light receiving unit installed at the other side of the rotating unit 20 to receive light to pass through the rotating hole ( 22), the waveform generating unit 23 for generating a pulse in accordance with the output of the light receiving unit 22, the LED 24 for informing the user of the degree of clogging of the filter 5, the output from the waveform generating unit 23 And a microcomputer (25) which controls the on / off of the LED (24) by determining the degree of clogging of the filter (5) after counting the number of pulses to detect the air volume. 제 1 항에 있어서, 상기 회전부(20)는 상기 필터(5)를 통과한 풍량에 의해 회전하며 상기 회전홀(20a)이 형성한 회전판(20b), 상기 회전판(20b)을 지지하는 회전축(20c), 상기 회전판(20b)이 부착되어 공기저항을 받는 회전날개(20d)로 구성됨을 특징으로 하는 빨래건조기의 필터막힘감지장치.2. The rotating shaft 20c according to claim 1, wherein the rotating part 20 rotates by the amount of air passing through the filter 5 and supports the rotating plate 20b formed by the rotating hole 20a and the rotating plate 20b. ), Filter clogging detection device of the laundry dryer, characterized in that consisting of a rotating blade (20d) is attached to the rotary plate (20b) is subjected to air resistance. 제 1 항에 있어서, 상기 발광부(21)는 발광 다이오드(FD1)로 구성되며, 상기 수광부(22)는 수광 트랜지스터(PT1)로 구성됨을 특징으로 하는 빨래건조기의 필터막힘감지장치.The apparatus of claim 1, wherein the light emitting unit (21) comprises a light emitting diode (FD 1 ), and the light receiving unit (22) comprises a light receiving transistor (PT 1 ). 제 1 항에 있어서, 상기 파형발생부(23)는 상기 수광부(22)의 출력단에 베이스단이 연결되고, 상기 마이콤(25)에 콜렉터단이 연결된 트랜지스터(T2)를 구비하여 구성됨을 특징으로 하는 빨래건조기의 필터막힘감지장치.According to claim 1, wherein the waveform generator 23 is characterized in that it comprises a transistor (T 2 ) is connected to the output terminal of the light receiving unit 22, the collector terminal is connected to the micom (25) Filter clogging detection device of a laundry dryer.
KR1019930018834A 1993-09-17 1993-09-17 A filter closed detectable apparatus of dryer KR960012514B1 (en)

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KR100592676B1 (en) * 2000-01-18 2006-06-26 삼성전자주식회사 Filter choking alarm of clothing dryer
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KR100479076B1 (en) * 2002-07-29 2005-03-28 엘지전자 주식회사 Dust amount sensing apparatus of dryer
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