恒溫發(fā)熱熱敏電阻器
恒溫加熱PTC熱敏電阻
恒溫加熱PTC熱敏電阻具有恒溫發(fā)熱特性,其原理是PTC熱敏電阻加電后自熱升溫使阻值進入躍變區(qū),恒溫加熱PTC熱敏電阻表面溫度將保持恒定值,該溫度只與PTC熱敏電阻的居里溫度和外加電壓有關(guān),而與環(huán)境溫度基本無關(guān).
PTC加熱器就是利用恒溫加熱PTC熱敏電阻恒溫發(fā)熱特性設(shè)計的加熱器件.在中小功率加熱場合, PTC加熱器具有恒溫發(fā)熱、無明火、熱轉(zhuǎn)換率高、受電源電壓影響極小、自然壽命長等傳統(tǒng)發(fā)熱元件無法比擬的優(yōu)勢,在電熱器具中的應(yīng)用越來越受到研發(fā)工程師的青睞.
PTC加熱器按傳熱方式分類:
(1)以熱傳導為主的PTC加熱器.其特點是通過PTC發(fā)熱元件表面安裝的電極板(導電兼?zhèn)鳠?)、絕緣層(隔電兼?zhèn)鳠幔?、導熱蓄熱板(有的還附加有導熱膠)等多層傳熱結(jié)構(gòu),把PTC元件發(fā)出的熱量傳到被加熱的物體上.
(2)以所形成的熱風進行對流式傳熱的各種PTC加熱器.其特點是輸出功率大,并能自動調(diào)節(jié)吹出風溫和輸出熱量.
(3)紅外輻射PTC加熱器.其特點是利用PTC元件或?qū)岚灞砻嫜杆侔l(fā)出的熱量直接或間接地激發(fā)其表面的遠紅外涂料或紅外材料使之輻射出紅外線,構(gòu)成陶瓷紅外輻射PTC加熱器.
PTC加熱器按應(yīng)用特點分類:
(1)普通實用型PTC加熱器.這類器具主要有 電熱蚊藥驅(qū)蚊器、暖手器、干燥器、電熱板、電燙斗、電烙鐵、電熱粘合器、卷發(fā)燙發(fā)器等.其特點是功率不大,但熱效率高很實用.
(2)自動恒溫型PTC加熱器.這類器具主要有:小型晶體器件恒溫槽、恒溫培養(yǎng)箱、電子保溫瓶、保溫箱、保溫杯、保溫盤、保溫柜、保溫桌等。其特點是自動保溫、結(jié)構(gòu)簡單、恒溫特性好、熱效率高、使用環(huán)境溫度范圍寬.
(3)熱風PTC加熱器.這類熱風PTC加熱器主要有:小型溫風取暖器、電吹風、暖房機、烘干機、干衣柜、干衣機、工業(yè)烘干設(shè)備等.其特點是輸出熱風功率大、速熱、安全、能自動調(diào)節(jié)風溫和功耗.
恒溫加熱PTC熱敏電阻按結(jié)構(gòu)分類:
恒溫加熱PTC熱敏電阻,可制作成各種形態(tài)和不同規(guī)格.常見的有圓片、圓環(huán)、長方形、長條形 、網(wǎng)絡(luò)面板以及蜂窩多孔狀等.
MZ4 SERIES PTC THERMISTOR
-----For Heater
FEATURES
-.With the characteristic of constant temperature, the PTC heater does not need the temperature-controlling.
-.If the PTC heater is used to heat the cold wind, it will not be destroyed when the wind is stopped.
-.If the PTC heater is used to heat the liquid (eg: water), it will not be destroyed when the liquid is burnt to be dry.
TYPICAL APPLICATIONS
-.Air-heating, wind-warming equipment, cold and warm air-conditioner.
-.Physical treatment, massage apparatus, biology heating.
-.Mosquito-driving apparatus, boiled-water equipment, heating board, shoe-drying apparatus, hair-curling equipment.