KR960010983A

KR960010983A - Current and filter clogging detection device of laundry dryer

Info

Publication number: KR960010983A
Application number: KR1019940022775A
Authority: KR
Inventors: 심효선
Original assignee: 이헌조; 엘지전자 주식회사
Priority date: 1994-09-09
Filing date: 1994-09-09
Publication date: 1996-04-20

Abstract

본 발명은 빨래건조기의 전류 및 필터막힘 감지장치에 관한 것으로, 특히 기기 동작시 부하에 흐르는 전류를 감지하여 부하의 이상 및 필터의 막힘정도를 감지하고자 한 것이다.The present invention relates to an apparatus for detecting a current and a filter clogging of a laundry dryer, and in particular, to detect an abnormality of a load and a degree of clogging of a filter by sensing a current flowing in a load during operation of the apparatus.

종래의 빨래건조기의 전류 및 필터막힘 감지장치는 필터막힘에 따라 변하는 전류의 양은 적은 양에 불과하며, 따라서 마이컴에 인가되는 전압의 양도 미미한 양에 불과하므로 콘덴서로 평활되여지는 전압의 변화량으로 감지하여서는 섬세한 필터막힘 감지를 할 수 없는 문제점이 있었다.The current and filter clogging detection device of the conventional laundry dryer is only a small amount of current that changes according to the filter clogging, and therefore the amount of voltage applied to the microcomputer is only a small amount, so as to detect the change in the voltage smoothed by the capacitor There was a problem that can not detect fine filter clogging.

본 발명은 이와 같은 종래의 문제점을 해결하기 위하여 트랜지스터의 온, 오프 시간에 따른 변화되는 전압파형의 펄스를 인식하여 설정되여 있는 값과 비교하여 부하의 동작 및 필터의 막힘감지를 하므로서, 부하에 흐르는 전류의 변화량에 대해 즉각적으로 반응하므로 필터의 막힘정도를 정확하게 간지할 수 있도록 한 것으로, 필터칵힘상태의 오감지로 인한 짤래건조기의 건조시간 지연등을 방지할 수 있도록 한 것이다.In order to solve such a conventional problem, the present invention compares the pulse voltage of the voltage waveform according to the on / off time of the transistor and compares it with the set value to detect the operation of the load and the blockage of the filter, thereby It immediately reacts to the amount of change in the current so that the degree of clogging of the filter can be accurately pinched, and it is possible to prevent the drying time delay of the squeezing dryer due to the erroneous detection of the filter jam state.

Description

Current and filter clogging detection device of laundry dryer

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명 빨래건조기의 전류 및 필터막힘 감지장치의 구성블럭도.Figure 3 is a block diagram of the current and filter clogging detection device of the laundry dryer.

제4도는 본 발명 빨래건조기의 전류 및 필터칵힘 감지장치의 각 부 파형도.Figure 4 is a waveform diagram of each part of the current and filter shake detection device of the laundry dryer according to the present invention.

제5도는 본 발명 빨래건조기의 전류 및 필터막힘 감지장치에서 감지하는 방법의 순서를 보인 플로우챠트.Figure 5 is a flow chart showing the sequence of the method for detecting the current and filter clogging detection device of the laundry dryer of the present invention.

Claims

The load driver 6 for driving the motor 7 and the heater 8, the current transformer T1 for inducing a voltage in the second stage in proportion to the amount of current flowing in the first stage, and the current transformer T1. A transistor for outputting the voltage output on and off switching to the microcomputer 3 by the bridge diode BD1 for full-wave rectifying the voltage output from the secondary side and the voltage rectified by the bridge diode BD1 ( Q1) and a microcomputer for controlling each block by receiving the voltage output from the transistor (Q1) and sensing the driving state and the filter clogging state of the load.

The method of claim 1, wherein the microcomputer determines whether the load is being driven and counts a value in which the pulse signal is low for a predetermined time when the load is being driven, and sets the counted value CT to the set values A, B, and C. Comparing the current and filter clogging detection device of the laundry dryer, characterized in that consisting of a microcomputer for detecting the driving state and the filter clogging state of the load.

※ Note: The disclosure is based on the initial application.