CN102031684B

CN102031684B - Clothes humidity detection device for clothes dryer

Info

Publication number: CN102031684B
Application number: CN2010105914557A
Authority: CN
Inventors: 张永刚
Original assignee: GUANGDONG YINGKE ELECTRONIC CO Ltd
Current assignee: GUANGDONG YINGKE ELECTRONIC CO Ltd
Priority date: 2010-12-16
Filing date: 2010-12-16
Publication date: 2012-06-20
Anticipated expiration: 2030-12-16
Also published as: CN102031684A

Abstract

The invention discloses a clothes humidity detection device for a clothes dryer. The device comprises an isolated power supply conversion module, a detection ring module, a signal conversion module, a signal isolation module and a signal processing module, wherein the isolated power supply conversion module is electrically connected with and supplies power to the signal conversion module, the signal isolation module, the detection ring module and the signal processing module; the detected high-voltage signal is processed into a low-voltage signal and is transmitted to a central processing unit (CPU); therefore, the operating accuracy is improved, the high-voltage signal is isolated, the product safety is improved, and the control circuit is simple and is easy to implement; meanwhile, the signal and a main processor are isolated, a leakage shock event is absent, a signal conversion module circuit is convenient to debug and replace and the signal can be processed customarily by only changing reference circuit parameters; and the invention is easier and more direct to implement.

Description

A kind of dryer clothing humidity detector

Technical field

The present invention relates to a kind of device of collection and processing of sensor signal; Detailed is a kind of dryer clothing humidity detector that is applied to; Behind the treated one-tenth low-voltage signal of detected high-voltage signal, be conveyed into CPU again, thereby improve the accuracy of running; Also can realize isolation processing, improve security of products high-voltage signal.

Background technology

For automatic washing machine popular on the market, have dry clothes drying function and be popularizing slowly, and as far as resting on the moisture content on the clothing, as long as suitable, the draughty words of temperature, the clothing of being done can realize promptly dried be effect.

At present, mainly be to utilize detecting head to survey the humidity on the clothing at the functions/drying aspect the dryer, when wet wash touches detecting head; Detecting head outputs signal to processor, again by the running of processor control heating wire, blower fan, utilizes the hot blast that produces according to predetermined ventilation shaft; Hot blast by discharging blows to wet wash; When the rotation that cooperates drum part the clothing upset is rolled, make in rotating process, to cooperate said hot blast, finally dry up clothing.Concerning detecting head, the life-span weak point is one of its shortcoming, uses repeatedly just to have aging phenomenon; And along with the transition of time, detecting head is through the immersion of water, soap; Make its surperficial deposition dirt easily, in addition, detecting head is owing to be charged work; Therefore, leaky is easier to take place, and this is breakneck to domestic. applications.

In addition, for omnibearing detection, the too much detecting head that is provided with; The difficult problem of cost and distributed circuit can occur, and too small detecting head quantity, then can not detect the humidity of clothing; Realize intact detected state; Simultaneously, the numerical value that detecting head detected floats bigger, for bringing difficulty in the control aspect.

Summary of the invention

The objective of the invention is the humidity of clothing to be carried out context of detection, a kind of omnibearing dryer humidity detector is provided in order to solve the problem of above-mentioned existence.

The present invention takes isolation method, makes behind the treated one-tenth low-voltage signal of high-voltage signal, directly imports CPU again, thereby improves accuracy, and the isolation processing to high-voltage signal has guaranteed security of products.

Therefore; The present invention includes: comprise an insulating power supply modular converter, a gauging ring module, a signal conversion module, a Signal Spacing module, a signal processing module; Wherein, Said insulating power supply modular converter is to be electrically connected and to be powered at signal conversion module, Signal Spacing module, gauging ring module and signal processing module; Said gauging ring module is the multi-faceted detection metal dots of annular multiconductor, and the cavity of this gauging ring module and clothing dryer is formed circular netted container cavity, and said signal conversion module is to change with shaping and produce the module of one group of controllable signal according to the detected signal of gauging ring module; Said Signal Spacing module is the module of the signal that signal conversion module is changed and shaping is come out being carried out isolation processing; During this time, the clothing that has humidity forms the loop with the detection metal dots, with the electric shock phenomenon of avoiding clothing to take out and put into.

Wherein, said insulating power supply modular converter is to be converted into the power module with the 15V low-voltage dc power supply of mains isolation to civil power.

Said signal conversion module also comprises and all can be used for regulating first adjustable resistance and second adjustable resistance to the detectable signal of gauging ring module; Regulate corresponding resistance value through first adjustable resistance and second adjustable resistance; The signal magnitude that raising or reduction detect is promptly regulated the detectable signal to the gauging ring module.

Beneficial effect of the present invention is to be conveyed into CPU again through behind the treated one-tenth low-voltage signal of detected high-voltage signal, thereby improves the accuracy of running, also can realize the isolation processing to high-voltage signal; Improve security of products, its control circuit is simple, realizes easily; Production and buying are brought great convenience, secondly, its signal and primary processor are carried out isolation processing; Do not exist the electric leakage incident of hurting sb.'s feelings to take place, and the signal conversion module circuit debugging is convenient with change, as long as its reference circuit parameter of change; Just can realize and reach the processing signals of oneself being accustomed to most, implement simpler, more direct.

Description of drawings

Fig. 1 is a shaped as frame signal schematic diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

The specific embodiment

See also the preferred embodiment of the present invention that goes out shown in Figure 1; It comprises a gauging ring module 3, a signal conversion module 1, a Signal Spacing module 4, a signal processing module 5, an insulating power supply modular converter 2; Wherein, Said insulating power supply modular converter 2 is to be converted into the low-voltage dc power supply with mains isolation to civil power, comprises DC15V and DC5V power supply, and this DC15V is then electric to supply power to gauging ring module 3, signal conversion module 1, Signal Spacing module 4 and signal processing module 5; During this time; Signal Spacing module 4 is an opto-coupler chip, and the pin of this opto-coupler chip connects situation: the 5th pin A5 is connected with signal processing module 5, the 4th pin A4 ground connection, first pin A1 connection AC power ACC and the 2nd pin A2 are connected with signal conversion module 1, and this opto-coupler chip specifically can be the PC817 chip; And include process chip U4 in the signal conversion module 1, and it is 555 model chips, and it only need be that general technical staff writes conventional signal handler and gets final product in practical implementation, and the circuit connecting mode of its each pin (B1-B8) is seen shown in Figure 2.Said gauging ring module 3 connects external sniffer; Be the usefulness that do to survey produces signal, and this signal majority is high-frequency signal, this high-frequency signal transmission is described signal conversion module 1 extremely; High-frequency signal regulate be lowered into low frequency signal after; Transfer to Signal Spacing module 4 to this low frequency signal again and further isolate the extra band electrical phenomena, the leaky that promptly is commonly called as, this low frequency signal finally transfers to signal processing module 5 and makes Signal Processing.

As shown in Figure 2, and further carefully state the principle of each parts, the power supply power supply that said insulating power supply modular converter 2 is VCC interfaces connects end; Also not shown among the figure; Said gauging ring module 3 is the multi-faceted detection hard contacts of a kind of annular multiconductor, can form circular netted container cavity with the cavity of clothing dryer, and to the clothing humidity value in the dryer container sample out a succession of irregular signal and discontinuous resistance value; Said signal conversion module 1 is to change and shaping according to gauging ring module 3 detected signals; Just convert a succession of irregular signal of gauging ring module 3 to the continuous square-wave signal of rule, thereby produce one group of controlled and easy to handle signal, said Signal Spacing module 4 is that the signal that signal conversion module 1 conversion and shaping are come out is carried out isolation processing; It prevents leaky; During this time, the clothing that has humidity with survey metal dots and form the loop, to avoid clothing to take out and electric shock phenomenon when putting into.

And; Said signal conversion module 1 also comprises and all can be used for regulating first adjustable resistance 11 and second adjustable resistance 12 to the detectable signal of gauging ring module; Regulate corresponding resistance value through first adjustable resistance 11 and second adjustable resistance 12; The signal magnitude that raising or reduction detect is promptly regulated the detectable signal to gauging ring module 3.

According to above-mentioned explanation, and combine accompanying drawing as preferred embodiments of the present invention, right, other equivalent embodiment of the present invention is not limited thereto, and understands by said practical implementation, and above-mentioned embodiment has disclosed concrete function of the present invention and architectural characteristic.

Claims

1. dryer clothing humidity detector; It includes an insulating power supply modular converter (2), a gauging ring module (3), a signal conversion module (1), a Signal Spacing module (4), a signal processing module (5); Wherein, Said insulating power supply modular converter (2) is to be electrically connected and to be powered at signal conversion module (1), Signal Spacing module (4), gauging ring module (3) and signal processing module (5); Said gauging ring module (3) is the multi-faceted detection metal dots of annular multiconductor; This gauging ring module (3) is formed circular netted container cavity with the cavity of clothing dryer; Said signal conversion module (4) is to change with shaping and produce the module of one group of controllable signal according to the detected signal of gauging ring module (3), and said Signal Spacing module (4) is the module of the signal that signal conversion module (1) conversion and shaping are come out being carried out isolation processing.

2. dryer clothing humidity detector according to claim 1 is characterized in that: said insulating power supply modular converter (2) is to be converted into the power module with the 15V low-voltage dc power supply of mains isolation to civil power.

3. dryer clothing humidity detector according to claim 1 is characterized in that: said signal conversion module (1) also comprises and all can be used for regulating first adjustable resistance (11) and second adjustable resistance (12) to the detectable signal of gauging ring module (3).