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電熱管電阻值范圍計算

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電熱管|加熱管|銅加熱管|鈦加熱管|選購

電熱管|加熱管|銅加熱管|鈦加熱管|選購

加熱管的設計、生產過程中,加熱管的電阻值大小,決定了加熱器的功率支,國標明確規定,電熱管功率誤差范圍及電熱管電阻值誤差范圍,下面文章我將舉例介紹如何計算1支鋁質加熱管的電阻范圍值,在什么電阻范圍內的加熱管才符合相關標準。

1:拿到客戶的圖紙,理解客戶要求:使用電壓:230V, 電熱管功率650W+5-10%;用電腦將電熱管CAD圖紙畫出來,計算出管子的展開長度 為:252mm,

2:計算出電熱管電流強度A及加熱管電阻值Ω, I-電流強度A ,P-電熱管功率W, V-工作電壓V, R-電阻值Ω,I=P /U;=650/230=2.83A;R=U/I=230/2.83=81.3Ω

3,根據常用的加熱管電阻值Ω國標范圍:+5-10%電阻值(公司的標準為:+4-8%計算)=等于出廠電阻,特別說明:按國標是+5-10%,為啥按+4-8%計算,計算時把電阻范圍縮小,就是說:在生產中電阻超出+4-8%范圍,還在+5-10%范圍內,這樣不會出現電阻偏大偏小.電阻下限值: 81.3÷1,04=78.1Ω;電阻上限值: 81.3÷0,92=88.3Ω

In the design, the production process heating pipe, heating pipe resistance value, determines the power of a heater(電熱管功率), GB stipulates, electric heating tube power error range and an electric heating pipe resistance error range, the following article I will introduce how to calculate the 1 aluminum heating pipe resistance range value, heating in what range of resistance within the tube to comply with the relevant standards.
1: got the customer’s drawings, understand customer requirements: using voltage: 230V, power 650W+5-10%; the electric heating pipe with computer CAD drawing out, calculate the pipe length: 252mm,
2: calculates the current intensity is A and the electric heating pipe resistance value(電熱管電阻值), I- current intensity of A, P- heat pipe power(電熱管功率) W, V- working voltage V, R- resistance, I=P /U; =650/230=2.83A; R=U/I=230/2.83=81.3.
3, according to the common heating pipe resistance value of Omega GB range: +5-10% resistance value (the company standard: +4-8%) = factory resistance special note: according to national standard +5-10%, why is calculated according to +4-8%, the resistance range is narrow, that is: in the production of resistance beyond the scope of +4-8%, still in the range of +5-10% this will not occur, larger resistance is small. The resistance limit: 81.3 / 1,04=78.1 Ω; resistance limit: 81.3 / 0,92=88.3

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