CN204721622U - 一种热敏陶瓷发热器的发热体及热敏陶瓷发热器 - Google Patents

一种热敏陶瓷发热器的发热体及热敏陶瓷发热器 Download PDF

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CN204721622U
CN204721622U CN201520206032.7U CN201520206032U CN204721622U CN 204721622 U CN204721622 U CN 204721622U CN 201520206032 U CN201520206032 U CN 201520206032U CN 204721622 U CN204721622 U CN 204721622U
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蒋国屏
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Suzhou Guowei Temperature Sensitive New Material Co ltd
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Abstract

本实用新型公开了一种热敏陶瓷发热器的发热体及热敏陶瓷发热器,包括发热芯和导热管,发热芯由绝缘纸将夹持了发热片和绝缘片的电极片四周紧密包覆而成,导热管的长度方向是导热平面,中间是能穿入和容纳所述发热芯的矩形空腔,发热芯贯穿导热管的矩形空腔,发热芯引出端头部延伸出导热管引出端,发热芯引出端头部的绝缘纸头部超出对应于此处的导热管的头部2-7mm。所述导热管的外侧面设有不少于两条半圆形凹槽。采用本实用新型的设计,使得导热管和其内部的发热芯贴合更加紧密,同时,使得在安装外部支架过程能够针对发热体在安装支架中的占比而设计安装支架的空腔,提高发热体在安装支架中的紧固性,并且可以减少安装支架的生产材料,节约成本。

Description

一种热敏陶瓷发热器的发热体及热敏陶瓷发热器
技术领域
本实用新型涉及一种发热器,特别是一种热敏陶瓷发热器的发热体及热敏陶瓷发热器。
背景技术
现有技术为:
    一种PTC发热器的导热铝管及PTC发热器(公开号CN 201499328U),其导热铝管有两端开口的空腔,所述导热铝管的上表面和下表面分别设有凹槽,铝管管壁厚度为0mm-1.5mm。
采用此种技术方案,压制后的侧面形成一条凹槽,可以起到改善发热片、电极条、绝缘膜之间的配合紧密和抵消压制时铝管向宽度方向延伸而导致铝管发热芯宽度增加的积极效果。由于该种结构在压制前铝管的侧面是内凹的平面或月牙形的弧面,因压制中压制力的不均匀和铝管导热面向宽度方向的延伸等因素的影响,极易使压制后的铝管发热体导热面的宽度超过对应粘结在所述发热体导热面上的散热条的宽度,使散热条粘接在压制后的铝管发热体(成为PTC加热器)后,由于铝管发热体的宽度超过了散热条的宽度而致使成套PTC加热器的报废。此外,压制后的铝管发热体的侧面虽然能够形成凹槽,但实际批量生产时很难保证该凹槽凹陷均匀且垂直于铝管发热芯的导热平面,由此带来绝缘和尺寸的不良率增加的缺陷。
 一种密封型正温度系数热敏电阻加热器(专利号ZL200620034186.3),该技术是在空心导热体的表面加工了散热片,空心导热体的侧面内部是W、V、U形槽和向内凸出的锐角,侧表面的厚度方向是平面。由于散热片和导热体是同一个整体,只能对位于散热片二侧有内凹锐角的侧棱边处加压来固定空腔内的发热片和定位,众所周知,对内凸的锐角加压极易刺破、刺伤绝缘膜导致短路,同时,对侧棱的加压只能保证发热片的定位,达不到使位于导热体内部的发热片的发热平面和电极片的导热平面及绝缘纸之间的紧密、牢固贴合,其内部起不同作用的发热、导电、导热、绝缘配件间不可避免的存在接触间隙,极易发生接触不良导致的打火、击穿等安全性事故。此外,由于接触发热片和导电电极及导热体之间的接触不紧密,发热片的热量无法全部、有效的传导给散热片,在相同的功率标准下,需要较多数量的发热片才能满足功率要求,生产成本高、热效率也低。
此外,已有技术对发热体的电极引出部和管内非电极引出尾部与对应于此处的绝缘纸、导热管、散热器之间没有安全、可靠和方便控制的实用距离规定,这就很难保证发热芯内的电极片二端和导热管、散热器之间的可靠绝缘。
综上所述,已有技术均没有解决充分发挥和提高热敏陶瓷发热片的热效率、保证发热器的可靠性和安全性的实用难题。
实用新型内容
实用新型目的:本实用新型彻底解决了热敏陶瓷发热器的发热体和发热器已有技术存在的热效率低,安全性、结构不稳定和无法保证一致性和可靠性的实用问题。
    技术方案:本实用新型提供以下技术方案:一种热敏陶瓷发热器的发热体,包括发热芯和导热管,所述发热芯由绝缘纸将夹持了发热片和绝缘片的电极片四周紧密包覆而成,所述导热管的长度方向是导热平面,中间是能穿入和容纳所述发热芯的矩形空腔,所述发热芯贯穿导热管的矩形空腔,所述发热芯引出端头部延伸出导热管引出端,所述发热芯引出端头部的绝缘纸头部超出对应于此处的导热管的头部2-7mm。
    作为优化,所述发热芯在位于非引出端尾端的绝缘纸尾部位于所述导热管的尾部内,所述绝缘纸的尾端与所述导热管的尾端之间的相对距离为2~30mm。
    一种热敏陶瓷发热器的发热体的导热管,所述导热管的周边壁厚大致相等,其长度方向是导热平面,中间是能穿入和容纳所述发热芯的矩形空腔,所述导热管的外侧面上设有不少于两条半圆形的凹槽。
    一种热敏陶瓷发热器,包括发热体和散热器,所述发热体包括导热管和穿入导热管空腔的发热芯,所述导热管引出端头部延伸出散热器引出端头部,导热管引出端头部与散热器引出端头部的散热片之间的相对距离为1~20mm。
作为优化,所述散热器可以是在所述发热体的导热管导热平面上结合的散热片/与导热管一体化的空心散热体。
技术效果:本实用新型与现有技术相比:
1、采用侧面有二条向内凹陷弧形槽的导热管。该导热管内凹的弧形槽自导热的外侧面向内凹陷,在导热管导热体的内侧腔内与发热芯的绝缘纸在此处的接触是一个平滑过渡的弧形,解决了现有技术在导热管压制平面时,因压力不均匀导致内凹槽位移而带来对的发热芯对应于此处的绝缘层伤害的安全性问题。
    2、采用侧面有二条向内凹陷弧形槽导热管的发热体,有效地保障了在压制导热管的发热平面时,导热管内部的发热芯内的发热片、电极片和绝缘纸之间既可以完全紧密贴合,充分发挥发热片的热效率。
    3、由于发热芯和导热管的空腔之间在宽度和厚度方向有一定的穿装间隙,在对压制发热体的导热管导热面时,此二部分间隙均会往宽度方向延伸,本实用新型在导热管侧面的二条向内凹陷弧形槽因具有在压制时自然向中心均匀收缩的创造效果,使得穿装间隙导致向宽度方向的延伸全部被凹槽所抵消,二条凹槽的收缩量确保了发热体内部贴合紧密的前提下,宽度方向无任何延伸,从而保证了压制后发热体的宽度仍和散热条的宽度一致的重要技术目标得以可靠实现。
    4、采用侧面有二条向内凹陷弧形槽导热管的发热体,保证了发热体在压制后侧面的二条弧形槽的平直、收缩均匀,压制后产品的绝缘不良品基本杜绝,发热片的用量也减少10%以上。
    5、本实用新型规范了发热体导热管内发热芯的电极引出部和非电极引出尾部及对应于此处的绝缘纸、导热管、散热器之间的实用和安全距离,在大大提高生产效率和降低生产成本的基础上,确保了发热器的散热器和发热芯内的电极片二端及导热管之间的可靠绝缘,极大的方便了大批量生产的结构控制,彻底消除了因结构尺寸不规范而导致的击穿、短路和散热器表面带电等重大安全性隐患。
附图说明
图1为本实用新型导热管的结构示意图;
图2为本实用新型发热体的结构示意图;
图3为本实用新型采用导热管导热平面上结合散热片的散热器的结构示意图;
图4为本实用新型采用与导热管一体化的空心散热体的散热器的结构示意图。
具体实施方式
实施例1
    如附图1所示,一种热敏陶瓷发热器的发热体的导热管,所述导热管1的周边壁厚相等,其长度方向是导热平面2,中间是能穿入和容纳所述发热芯的矩形空腔3,所述导热管1的外侧面上设有两条半圆形的凹槽4。
实施例2
    如附图2和附图3所示,一种热敏陶瓷发热器的发热体的导热管,所述导热管1的周边壁厚相等,其长度方向是导热平面2,中间是能穿入和容纳所述发热芯的矩形空腔3,所述导热管1的外侧面上设有三条半圆形的凹槽4。
实施例3
    如附图2所示,一种热敏陶瓷发热器的发热体,包括发热芯和导热管1,所述发热芯由绝缘纸5将夹持了发热片6和绝缘片7的电极片8四周紧密包覆而成,所述导热管1的长度方向是导热平面2,中间是能穿入和容纳所述发热芯的矩形空腔3,所述发热芯贯穿导热管1的矩形空腔3,所述发热芯引出端头部延伸出导热管1引出端,所述发热芯引出端头部的绝缘纸5头部超出对应于此处的导热管1的头部7mm。所述发热芯在位于非引出端尾端的绝缘纸5尾部位于所述导热管1的尾部内,所述绝缘纸5的尾端与所述导热管1的尾端之间的相对距离为30mm。     
实施例4
    如附图2所示,一种热敏陶瓷发热器的发热体,包括发热芯和导热管1,所述发热芯由绝缘纸5将夹持了发热片6和绝缘片7的电极片8四周紧密包覆而成,所述导热管1的长度方向是导热平面2,中间是能穿入和容纳所述发热芯的矩形空腔3,所述发热芯贯穿导热管1的矩形空腔3,所述发热芯引出端头部延伸出导热管1引出端,所述发热芯引出端头部的绝缘纸5头部超出对应于此处的导热管1的头部2mm。所述发热芯在位于非引出端尾端的绝缘纸5尾部位于所述导热管1的尾部内,所述绝缘纸5的尾端与所述导热管1的尾端之间的相对距离为2mm。
实施例5
    如附图3所示,一种热敏陶瓷发热器,包括发热体和散热器,所述发热体包括导热管1和穿入导热管1空腔的发热芯,所述导热管1引出端头部延伸出散热器引出端头部,导热管1引出端头部与散热器引出端头部的散热片之间的相对距离为1mm。所述散热器为在所述发热体的导热管1导热平面上结合的散热片9。
实施例6
如附图4所示,一种热敏陶瓷发热器,包括发热芯和空心散热器10,所述空心散热器由空心导热体经过铲、切形成导热管体1和散热片10二部分,所述导热管体1引出端头部延伸出散热片10引出端头部,导热管体1引出端头部与散热片引出端头部的散热片10之间的相对距离为20mm。

Claims (5)

1.一种热敏陶瓷发热器的发热体,包括发热芯和导热管(1),所述发热芯由绝缘纸(5)将夹持了发热片(6)和绝缘片(7)的电极片(8)四周紧密包覆而成,所述导热管(1)的长度方向是导热平面(2),中间是能穿入和容纳所述发热芯的矩形空腔(3),所述发热芯贯穿导热管(1)的矩形空腔(3),其特征在于:所述发热芯引出端头部延伸出导热管(1)引出端,所述发热芯引出端头部的绝缘纸(5)头部超出对应于此处的导热管(1)的头部2-7mm。
2.根据权利要求1所述的发热体,其特征在于:所述发热芯在位于非引出端尾端的绝缘纸(5)尾部位于所述导热管(1)的尾部内,所述绝缘纸(5)的尾端与所述导热管(1)的尾端之间的相对距离为2~30mm。
3.一种热敏陶瓷发热器的发热体的导热管,其长度方向是导热平面(2),中间是能穿入和容纳所述发热芯的矩形空腔(3),其特征在于:所述导热管(1)非导热面的厚度方向外侧面上设有不少于两条半圆形的凹槽(4)。
4.一种采用如权利要求1所述的发热体的热敏陶瓷发热器,包括发热体和散热器,所述发热体包括导热管(1)和穿入导热管空腔的发热芯,其特征在于:所述导热管(1)引出端头部延伸出散热器引出端头部,导热管(1)引出端头部与散热器引出端头部的散热片之间的相对距离为1~20mm。
5.根据权利要求4所述的热敏陶瓷发热器,其特征在于:所述散热器为在所述发热体的导热管(1)导热平面(2)上结合的散热片(9)/与导热管(1)一体化的空心散热体(10)。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110238951A (zh) * 2019-07-11 2019-09-17 安徽苏立电气科技有限公司 一种陶瓷加热器的半自动灌浆装置及其使用方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110238951A (zh) * 2019-07-11 2019-09-17 安徽苏立电气科技有限公司 一种陶瓷加热器的半自动灌浆装置及其使用方法

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