Today i want to cry!~
Why?
2007年5月7日星期一
HAPPY AND TRIED!~
It’s very tired while I accepted the job of guide these days. It’s holiday for most people in Labor Day, except some jobs such as guide, seller, and attendants. And now, I am a guide though I am just a part-time guide. Many people travel while they are in their holidays, especially in the long-time holidays, such as Labor Day and National Day. Tour is happy for the travelers, but tired for us. Some travelers do what they want to do which are forbidden by travel agents, though sometimes I warn them, but almost fail to. Children are lovely, but some children are naughty. Some landscape is beautiful, but dangerous, I have to take care of them, and guarantee safety before breaking the ranks and do what they want to. So tired days.
2007年4月27日星期五
so much works these days!
We are so busy these days. I don’t know why so much works we must do in such short time which is over our affordability. But we must do, and finish them on time. Nothing I could think about except my works, nothing I could feel except helpless and tired. I want to travel with my friends, I want to play tennis with my classmates, but these are just illusion. How can I be free from the works? I miss you so much, but we have so much works to do. I know everything I should do it myself, because everyone is helpless except me.
Introduction of flameout protector
The purpose of flameout protector:
When we use the cook top, the fire may be extinct because of the wind or overflowing water. In this case, the protector may cut off gas to prevent some accidents happening because of its leakage, such as poisoning, explosion or fire. In this way, it realizes its safety protection function.
Working sketch-map of flameout protector
The first step: Piezoelectricity
The second step: Valve-open condition
The top of the thermocouple is heated by fire, and it causes thermo electromotive force. Then it will be in series between the closed circuit and the valve. Outside force and the magnetic field breathe the valve and keep it open, and the gas channel is open.
The third step: Cut off gas in sudden flameout condition
When the fire is extinct because of wind or overflowing water, the thermo electromotive potential will minish quickly, and the ferrite core will come back to its original place to cut off the gas because of the loss of the spring effect.
Attention:
1. Thermocouple
1) There mustn’t be any damage or peeling off for the cover of insulation wire or insulation sleeve, otherwise it will cause short circuit, which will influence the normal operation of the valve.
2) The fix-up of the thermocouple must dissipate heat to reduce the heat accumulation of fixing board and thermocouple copper. This can shorten the valve-closing time when there is sudden flameout.
3) The heated part of a thermocouple must be on the top of 2-3mm. Not to put the top into the fire, otherwise it may reduce the potential and shorten its life.
When we use the cook top, the fire may be extinct because of the wind or overflowing water. In this case, the protector may cut off gas to prevent some accidents happening because of its leakage, such as poisoning, explosion or fire. In this way, it realizes its safety protection function.
Working sketch-map of flameout protector
The first step: Piezoelectricity
The second step: Valve-open condition
The top of the thermocouple is heated by fire, and it causes thermo electromotive force. Then it will be in series between the closed circuit and the valve. Outside force and the magnetic field breathe the valve and keep it open, and the gas channel is open.
The third step: Cut off gas in sudden flameout condition
When the fire is extinct because of wind or overflowing water, the thermo electromotive potential will minish quickly, and the ferrite core will come back to its original place to cut off the gas because of the loss of the spring effect.
Attention:
1. Thermocouple
1) There mustn’t be any damage or peeling off for the cover of insulation wire or insulation sleeve, otherwise it will cause short circuit, which will influence the normal operation of the valve.
2) The fix-up of the thermocouple must dissipate heat to reduce the heat accumulation of fixing board and thermocouple copper. This can shorten the valve-closing time when there is sudden flameout.
3) The heated part of a thermocouple must be on the top of 2-3mm. Not to put the top into the fire, otherwise it may reduce the potential and shorten its life.
2007年4月23日星期一
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