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if (JS_ChkReg(keyWords, "^[中文\\w][中文\\w\\-\\+\\(\\)\\,，、]*$") == false) { if (keyWords == "") { alert("請輸入搜索關鍵詞！"); } else { alert("查找關鍵字只能是中文或者英文數字"); } $("#keyword").focus(); return false; } else { return true; } }); </script> <div class="publicWidth pageLocation"> <a href="/" class="title1">首頁</a> >><a href="/list/?167.html">NF社區</a> >><a href="/list/?262_1.html">行業快訊</a> </div> <div class="publicWidth articleDetails"> <h1 id="article-title"> 電子溫控器原理及分類 </h1> <div class="inforArticle"> <span class="author"> <strong>作者：</strong>?？滤? <strong>來源：</strong>網絡 <strong>發布：</strong> 2015-5-22 15:03:29 </span> <span class="fontsize">[<a href="javascript:articleSize('16','30')">大</a>] [<a href="javascript:articleSize('14','24')">中</a>] [<a href="javascript:articleSize('12','21')">小</a>]</span> </div> <div id="article" class="word"> 電子式溫度控制器<br />　　電子式溫度控制器（電阻式）是采用電阻感溫的方法來測量的，一般采用白金絲、銅絲、鎢絲以及半導體（熱敏電阻等）為測溫電阻，這些電阻各有其優確點。家用空調的傳感器大都是以熱敏電阻式。熱敏電阻式溫控器是根據惠斯登電橋原理制成的，是惠斯登電橋。在BD兩端接上電源E，根據基爾霍夫定律，當電橋的電阻R1×R4=R2×R3時，A與C兩點的電位相等，輸出端A與C之間沒有電流流過，熱敏電阻的阻抗R1的大小隨周圍溫度的上升或下降而改變，使平衡受到破壞，AC之間有輸出電流。因此，在構成溫控器時，可以很容易地通過選擇適當的熱敏電阻來改變溫度調節范圍和工作溫度。<br />　　溫控器分類<br />　　以溫控器制造原理來分，溫控器分為：<br />　　一.電子式溫控器，電子式溫度控制器（電阻式）是采用電阻感溫的方法來測量的，一般采用白金絲、銅絲、鎢絲以及熱敏電阻等作為測溫電阻，這些電阻各有其優確點。一般家用空調大都使用熱敏電阻式。電子式溫度控制器具有穩定，體積小的優點，現在在越來越多的領域中得到使用。<br />　　二,液漲式溫控器：是當被控制對象的溫度發生變化時使溫控器感溫部內的物質（一般是液體）產生相應的熱脹冷縮的物理現象（體積變化），與感溫部連通一起的膜盒產生膨脹或收縮。以杠桿原理，帶動開關通斷動作，達到恒溫目的液脹式溫控器具有控溫準確，穩定可靠，開停溫差小，控制溫控調節范圍大，過載電流大等性能特點。液漲式溫控器主要用于家電行業，電熱設備，制冷行業等溫度控制場合用。<br />　　三，壓力式溫控器，改溫控器通過密閉的內充感溫工質的溫包和毛細管，把被控溫度的變化轉變為空間壓力或容積的變化，達到溫度設定值時，通過彈性元件和快速瞬動機構，自動關閉觸頭，以達到自動控制溫度的目的。它由感溫部、溫度設定主體部、執行開閉的微動開關或自動風門等三部分組成。壓力式溫控器適用于制冷器具（如電冰箱冰柜等）和制熱器等場合。以上幾種是常見的機械式溫控器。<br />　　四，突跳式溫控器：各種突跳式溫控器的型號統稱NFD，常見的如NFD8810,NFD8820等，該溫控器是雙金屬片溫控器的新型產品，主要作為各種電熱產品具過熱保護時，通常與熱熔斷器串接使用，突跳式溫控器作為一級保護。熱熔斷器則在突跳式溫控器失婁或失效導致電熱元件超溫時，作為二級保護自，有效地防止燒壞電熱元件以及由此而引起的火災事故。<br /><br /><script src="/inc/AspCms_VisitsAdd.asp?id=2323"></script> </div> <div id="C_wechat_link" style="display: none;"></div> <iframe style="display: none;width:100%;border-width: 0;overflow: hidden;" id="iFrame" width="100%"></iframe> <script> function getUrl(URL) { let http = (window.location.protocol === 'http:' ? 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