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fa布日期:2018-01-16 作者:yan城市亚bo手机ban官方登录wang站电热科技有限gong司 点ji:

电流热xiao应原理:电子在电changzhong得到加su,获得动能,具有su度,然hou碰撞其tade微粒(原子,fen子,原子tuan,….)使其tade微粒获得动能,dao致平均动能增大,温度升高. 焦耳-楞次ding律: 电流通过电阻时,电阻就会fa热,将电能转换为热能,这zhong现象叫做电流de热xiao应。 焦耳和楞次通过大量de试验,fa现电阻通过电流hou所产生de热量与电流de平方、电阻及通电时jian成zheng比。这就是是焦耳-楞次ding律。 电能转换为热能de关系ke用gong式表示:Q=(Ide二次方)Rt I=电流;R=电阻;t=时jian;Q=电阻上产生de热量。

Current heating principle: electronic accelerated in the electric field, gain kinetic energy, has the speed and crash other particles (atoms, molecules, atoms, etc.) Give other particle kinetic energy, which leads to the average kinetic energy increases, the temperature rise. Joule – lenz’s law: the current through the resistance, the resistance will be fever, converts electrical energy into heat energy, this phenomenon is called the heating effect of the current. Joule and lenz through a large number of trials, found that the heat generated by the resistance by the current and the square of the current, resistance, and is proportional to the current time. This is what is the joule – lenz’s law. Available formula for the relation of the electrical energy is converted to heat energy, said: Q = quadratic (I) Rt I = current; R = resistance; T = time. Q = the heat generated by the resistance.

现在fen别解释一xiabu同电加热器适应de加热原理:

yan城市亚bo手机ban官方登录wang站电热科技有限gong司


Now to explain the different heating principle of electric heater is used to:

利用电流de焦耳xiao应将电能转bian成热能以加热物体。通常fen为直jie电阻加热和jianjie电阻加热。前者de电源电压直jie加到被加热物体上,当有电流流过时,被加热物体本身(如电加热熨平机)便fa热。ke直jie电阻加热de物体必须是dao体,但要有较高de电阻率。由于热量产生于被加热物体本身,属于内部加热,热xiao率很高。jianjie电阻加热需由专门dehejin材料或feijin属材料zhi成fa热元件,由fa热元件产生热能,通过fu射、对流和传dao等方式传到被加热物体上。由于被加热物体和fa热元件fen成两部fen,因此被加热物体dezhonglei一般bu受限zhi,操作简便。

The joule effect of using current transform electric energy into heat energy to heat the object. Usually divided into direct resistance heating and indirect resistance heating. Power supply voltage of the former directly to the heated object, when have a current flows through the heated object itself, such as electric heating ironing machine) and fever. Direct resistance heating object must be a conductor, but must have the high resistivity. Due to the heat generated by heated object itself, belongs to the internal heating, high thermal efficiency. Indirect resistance heating should be made of special alloy materials or non-metallic materials, heating element, heat generated by the heating element, through radiation, convection and conduction to the heated object. Because of the heated object is divided into two parts and heating elements, so heated object types is generally not restricted, easy to operate.

jianjie电阻加热defa热元件所用材料,一般要求电阻率大、电阻温度系shu小,在高温xiabian形小且bu易cui化。常用de有tie铝hejin、nie铬hejin等jin属材料和碳化硅、二硅化mu等feijin属材料。jin属fa热元件dezui高工作温度,根据材料zhongleike达1000~1500℃;feijin属fa热元件dezui高工作温度ke达1500~1700℃。hou者安装方便,ke热炉更换,但它工作时需要调压装置,寿命比hejinfa热元件短,一般用于高温炉、温度超过jin属材料fa热元件yun许zui高工作温度de地方和某些特殊changhe。

Indirect resistance heating heating element materials, general requirements resistivity, temperature coefficient of resistance small, little deformation at high temperature and not easily embrittlement. Commonly used a iron alloy, nickel chromium alloy and other metal materials and silicon carbide, such as molybdenum disilicide non-metallic materials. The highest working temperature, metal heating element according to the types of materials can reach 1000 ~ 1000 ℃; Non-metallic heating element of the highest working temperature is 1500 ~ 1700 ℃. Which features easy installation, can change hot stove, but it requires pressure regulating device at work, life, shorter than alloy heating elements, commonly used in high temperature furnace, temperature more than metal materials heat element allows the highest working temperature place, and some special occasions.


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