WO2015184766A1 - 一种通风型ptc加热器 - Google Patents

一种通风型ptc加热器 Download PDF

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Publication number
WO2015184766A1
WO2015184766A1 PCT/CN2014/094514 CN2014094514W WO2015184766A1 WO 2015184766 A1 WO2015184766 A1 WO 2015184766A1 CN 2014094514 W CN2014094514 W CN 2014094514W WO 2015184766 A1 WO2015184766 A1 WO 2015184766A1
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ptc
ceramic
metal tube
ptc ceramic
ventilated
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PCT/CN2014/094514
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English (en)
French (fr)
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徐伟
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上海帕克热敏陶瓷有限公司
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Publication of WO2015184766A1 publication Critical patent/WO2015184766A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Definitions

  • the invention relates to the field of thermal ceramics, in particular to a ventilated PTC heater.
  • the conventional insulated PTC heater is characterized in that the upper and lower electrode sheets are bonded to both sides of a plurality of PTC ceramics through a silica gel, and then the polyimide insulating paper is used as an insulating layer, and the PTC ceramics and the upper and lower electrode sheets are wrapped together, and then penetrated. Inside the square aluminum tube, it is formed by pressing the tube and bonding the heat sink.
  • Power aging is large: one of the reasons is that during the working process of the PTC heater, due to the long-term thermal expansion and contraction, the pressing force of the aluminum tube will become smaller, and the thermal resistance between the PTC ceramic and the aluminum tube will increase, resulting in The heat of the PTC ceramic is not sufficiently dissipated, which is manifested by the power aging of the heater.
  • the reliability of the insulation strength is poor: due to the inevitable mixing of some particulate impurities in the assembly process, in the production process or in the long-term work process, particulate impurities will damage the insulation paper, causing the heater surface to be charged, causing safety hazards.
  • the traditional heater uses polyimide as the insulating material, this material will volatilize under long-term high temperature, produce a small amount of neutral or reducing atmosphere, PTC ceramic in this atmosphere, grain boundary The adsorbed oxygen is released, degrading the performance of the PTC ceramic, lowering the lift-to-drag ratio, and possibly causing breakdown of the PTC ceramic under high pressure.
  • the width of the conventional electrode sheet is about 1 mm smaller than the width of the PTC ceramic.
  • the industry has used this rule for many years, such as the width of the PTC ceramic 11.8 mm.
  • the width of the electrode sheet is generally from 10.5 to 11 mm.
  • the surface electrode on the PTC ceramic exposes the edge of the stainless steel electrode sheet.
  • the object of the present invention is to solve the defects in the prior art that the power of the PTC heater is large, the reliability of the insulation strength is poor, the pressure reliability and the water resistance are poor, and a ventilated PTC heater is provided to solve the prior art. There are problems.
  • a ventilated PTC heater comprising a PTC ceramic combination and a metal tube, the PTC ceramic combination comprising an upper electrode sheet, a lower electrode sheet and a PTC ceramic, the upper electrode sheet and the lower electrode sheet being bonded by a silicone adhesive
  • the upper end surface and the lower end surface of the PTC ceramic are characterized in that the insulating heat conduction device is further disposed between the PTC ceramic assembly and the metal tube to isolate and fix the PTC ceramic assembly in the metal tube.
  • the shapes of the end sections of the upper electrode sheet and the lower electrode sheet are respectively circular arc shapes, and the circular arc shaped strings are bonded to the PTC ceramic.
  • the length of the chord of the upper electrode sheet having the circular arc-shaped end section is equal to the width of the PTC ceramic
  • the length of the chord of the lower electrode sheet having the circular arc-shaped end section is equal to the width of the PTC ceramic
  • the outer side of the metal tube is provided with a heat sink.
  • the heat sink can be circular, square, or other shape.
  • a silicone plug and a silica gel are sequentially disposed from the inner side to the outer side at both ends of the metal pipe.
  • an insulating ceramic is disposed between the PTC ceramic and the silicone plug.
  • the insulating and heat conducting device is a MgO ceramic tube
  • the MgO ceramic tube is sleeved in a metal tube
  • the PTC ceramic combination card is disposed in the MgO ceramic tube.
  • the insulating and heat conducting device comprises a spacer and insulating and thermally conductive particles, the spacers are spaced apart from the inner wall of the metal tube; the spacer is provided with a middle hole and a plurality of side holes, and the middle hole is used for the PTC A ceramic combination card is disposed therein, and the insulating and thermally conductive particles are filled in a cavity between the PTC ceramic assembly and the metal tube.
  • the insulating and thermally conductive particles are MgO sand.
  • the metal pipe is made of stainless steel, copper or aluminum.
  • the MgO sand is filled between the arc-shaped electrode piece and the metal tube, or the MgO ceramic tube is used to be separated between the arc-shaped electrode piece and the metal tube, the metal tube and the arc-shaped electrode piece are realized in space.
  • the isolation between the two because the insulation paper is not used as the insulation layer, there is no impurity wear insulating paper, the insulation strength failure is permanently avoided in the design, and the insulation reliability is obviously improved;
  • MgO is a well-insulated material, preventing the air discharge of the upper and lower electrodes of the PTC ceramic under high pressure. Breakdown caused;
  • the heat dissipation fins are placed on the outside of the metal tube to fully dissipate the internal heat
  • Figure 1 is a schematic cross-sectional structural view of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of a PTC ceramic assembly of the present invention
  • Figure 3 is a longitudinal sectional view of Embodiment 1 of the present invention.
  • Figure 4 is a schematic cross-sectional view showing the structure of Embodiment 2 of the present invention.
  • a ventilated PTC heater includes a PTC ceramic assembly 1 and a metal tube 2, and the PTC ceramic assembly 1 includes an upper electrode sheet 3, a lower electrode sheet 4, and a PTC ceramic 5, an upper electrode sheet 3 and a lower portion.
  • the electrode sheets 4 are respectively bonded to the upper end surface and the lower end surface of the PTC ceramic 5 through a silicone adhesive;
  • a ventilated PTC heater further includes an insulating heat conducting device, and the insulating heat conducting device of the embodiment is a separator 6 and an insulating heat conduction.
  • the granules 7 and the spacers 6 are designed in the shape of a gear, and are disposed at intervals on the inner wall of the metal pipe 2 with a middle hole therebetween for accommodating the PTC ceramic assembly 1 therein.
  • the convex portion realizes the isolation between the metal tube 2 and the circular arc-shaped electrode sheet, and the recessed portion is a side hole, which is favorable for the leakage of sand.
  • the spacer 6 is mainly used for isolating the PTC ceramic assembly 1 and the metal tube 2, and the PTC ceramic assembly 1 is disposed in the metal tube 2 through the spacer 6, and the spacer 6 serves as a positioning support for the PTC ceramic assembly 1, and the thickness of the spacer 6 Generally, within 5 mm, a cavity is formed between the PTC ceramic assembly 1 and the metal tube 2, and the cavity is filled with insulating and thermally conductive particles 7.
  • the cross-section shapes of the upper electrode tab 3 and the lower electrode tab 4 are respectively circular arc-shaped, and the arc-shaped chord is bonded to the PTC ceramic 5; the combination of the upper electrode tab 3, the lower electrode tab 4 and the PTC ceramic 5 is substantially rounded
  • the shape is similar to the shape of the inner side of the spacer 6, and is convenient for fixing, similar to the shape of the metal tube 2, and also facilitates heat transfer.
  • the insulating and thermally conductive particles 7 are MgO sand, which achieves spatial isolation and also has wear resistance and oxidation resistance; it is a more preferred embodiment of the present invention.
  • the heat sink 8 is disposed on the outer side of the metal tube 2 to enhance the heat dissipation effect.
  • the two ends of the PTC ceramic assembly 1 are respectively provided with a silicone plug 9 and a silica gel 10 from the inner side to the outer side, and a double-layer waterproof structure is adopted, so that the waterproof level can reach IP68.
  • An insulating ceramic 11 is disposed between the PTC ceramic 5 and the silicone plug 9 at both ends of the PTC ceramic 5.
  • the length of the insulating ceramic 11 is short, and the length of the drawing can be referred to.
  • the metal tube 2 is made of stainless steel, copper or aluminum.
  • the length of the end section chord of the upper electrode sheet 3 having an end section of a circular arc shape is equal to the width of the PTC ceramic 5
  • the length of the end section chord of the lower electrode sheet 4 having an end section of a circular arc shape is equal to the width of the PTC ceramic 5.
  • a small hole is arranged on the circular arc electrode piece to facilitate the fixed use during assembly, and at the same time, the screw can be screwed into the small hole to facilitate the installation of the lead wire.
  • the PTC ceramic 5 is bonded to the upper and lower circular arc-shaped aluminum electrode sheets 3 and 4 through the silica gel (insulating ceramics are respectively placed on both ends of the electrode sheet), and is positioned in the metal tube 2 through the separator 6, wherein the metal tube One port of 2 is closed with a silicone plug 9; then filled with MgO sand between the circular electrode sheet and the metal tube 2 as an insulating layer, and then closed at the other end of the metal tube 2 with a silicone plug 9; The process shrinks the metal tube 2, so that all the components in the metal tube 2 are tightly pressed tightly to ensure good thermal conductivity and electrical conductivity; then the silicon tube 10 is sealed at both ends of the metal tube 2, and finally the heat sink 8 is set. It is made outside the metal tube 2.
  • the insulating and heat conducting device of this embodiment is a MgO ceramic tube 12, and the MgO ceramic tube 12 is sleeved in the metal tube 2, and the PTC ceramic assembly 1 is disposed in the MgO ceramic tube 12.
  • the PTC ceramic assembly 1 is installed in the MgO ceramic tube 12, and then the MgO is The ceramic tube 12 is sleeved and disposed in the metal tube 2, and both ends of the metal tube 2 are closed by a silicone plug 9; then the metal tube 2 is contracted by a shrink tube process, so that all the components in the metal tube 2 are tightly pressed and fitted. In order to ensure good thermal conductivity and electrical conductivity; then, the silicon tube 10 is sealed at both ends of the metal tube 2, and finally the heat sink 8 is sleeved outside the metal tube 2.
  • the arc-shaped electrode piece is used, and the heat generated by the sheet-shaped PTC ceramic is transmitted to the surface of the metal tube through the arc-shaped electrode piece, thereby realizing efficient heat transfer;
  • MgO sand or MgO ceramic tube to achieve space isolation, high insulation reliability, while achieving heat transfer;
  • Insulating ceramics are used at both ends to improve the reliability of the electric heating pipe
  • the heat sink is fixed on the round tube heater to increase the heat dissipation effect
  • the PTC ceramic combination is fixedly positioned in the middle, and the insulating and thermally conductive particles can be leaked in again; or the PTC ceramic combination can be directly fixed by using the MgO ceramic tube.

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Abstract

本发明公开了一种通风型PTC加热器，圆弧形上电极片和下电极片分别通过硅胶粘结剂粘结在PTC陶瓷的上端面和下端面，组成PTC陶瓷组合，绝缘导热装置设置于PTC陶瓷组合与金属管之间，使PTC陶瓷组合隔离固定于金属管内。本发明功率老化小，采用MgO沙填充，或者MgO陶瓷管隔绝在圆弧形电极片和金属管之间，在空间上实现了金属管和圆弧形电极片之间的隔离，不存在杂质磨损绝缘纸的情况，永久避免了绝缘强度的失效，使绝缘可靠性明显提高；由于MgO沙或者MgO陶瓷管紧密包裹在PTC陶瓷的周围，防止了PTC陶瓷上下电极在高压下的空气放电而造成的击穿；金属管的两端采用硅胶塞和硅胶双重密封，使防水等级达IP68。

Description

一种通风型PTC加热器 技术领域
本发明涉及热敏陶瓷技术领域，具体来说是一种通风型PTC加热器。
背景技术
传统的绝缘型PTC加热器，是将上下电极片通过硅胶粘结在若干片PTC陶瓷两面，再用聚酰亚胺绝缘纸作为绝缘层，将PTC陶瓷和上下电极片包裹在一起，然后穿入方形铝管内，经压管并粘结上散热器而成。
但是，这种加热器有一些固有的缺点，具体如下：
1、功率老化大：其中的一个原因是PTC加热器在工作过程中，由于长期的热胀冷缩，铝管的压紧力会变小，使PTC陶瓷和铝管间的热阻增加，导致PTC陶瓷的热量不能充分散发，表现为加热器的功率老化。
2、绝缘强度的可靠性差：由于在装配过程中，不可避免地混入一些颗粒杂质，在生产过程中或长期的工作过程中，颗粒杂质会破坏绝缘纸，导致加热器表面带电，引起安全隐患。
3、耐压可靠性差：传统的加热器由于采用聚酰亚胺作为绝缘材料，这种材料在长期高温下会挥发,产生少量中性或还原性气氛，PTC陶瓷在这种气氛下，晶界中吸附的氧会释放,使PTC陶瓷性能退化，升阻比下降，在高压下可能会导致PTC陶瓷的击穿。
同时，绝缘纸和PTC陶瓷的侧面存在一个小的空气间隙，在高压下，有可能导致上下电极间的空气放电击穿。
4、防水性差：传统的加热器由于铝管端口仅仅采用硅胶密封，密封的距离(深度)不够，容易导致水分的进入。
再者，由于电极片的作用只为覆盖PTC陶瓷表面电极，传统的电极片的宽度比PTC陶瓷的宽度小1mm左右，本行业多年以来均采用此规则进行制作，比如PTC陶瓷的宽度11.8mm，电极片宽度一般为10.5～11mm，在很多情况下(比如电极片扭曲、装配时电极片位置不居中对称、PTC陶瓷表面的电极偏心等)，PTC陶瓷上的表面电极会露出不锈钢电极片的边缘，在这种情况下，当长期使用后(在几万次的通断老化试验后)，在电极片的边缘和PTC陶瓷表面电极交接处，会产生电弧的现象，电弧产生的高温烧蚀绝缘纸，使绝缘纸碳化，导致加热器绝缘的失效，同时电弧还会烧坏PTC陶瓷的表面电极，从而 引起PTC陶瓷的功率老化，严重的话，还会导致PTC陶瓷的击穿，使加热器的ON/OFF使用寿命只能局限在几万次。
因此，特别需要一种新型的PTC加热器，以解决现有技术中存在的问题。
发明内容
本发明的目的是为了解决现有技术中，PTC加热器功率老化大、绝缘强度的可靠性差、耐压可靠性和防水性差的缺陷，提供一种通风型PTC加热器，来解决现有技术中存在的问题。
为实现上述目的，本发明的技术方案如下：
一种通风型PTC加热器，包括PTC陶瓷组合和金属管，所述PTC陶瓷组合包括上电极片、下电极片和PTC陶瓷，所述上电极片和下电极片分别通过硅胶粘结剂粘结在PTC陶瓷的上端面和下端面，其特征在于，还包括绝缘导热装置，所述绝缘导热装置设置于PTC陶瓷组合与金属管之间，使PTC陶瓷组合隔离固定于金属管内。
上述方案中，所述上电极片和下电极片端截面的形状分别为圆弧形，所述圆弧形的弦与PTC陶瓷粘结。
上述方案中，所述端截面为圆弧形的上电极片的弦的长度和PTC陶瓷的宽度相等，所述端截面为圆弧形的下电极片的弦的长度和PTC陶瓷的宽度相等。
上述方案中，所述金属管的外侧设置散热片。散热片可以是圆形、方形，或者其它形状。
上述方案中，在所述金属管的两端由内侧至外侧的方向分别依次设置硅胶塞和硅胶。
上述方案中，在所述PTC陶瓷与硅胶塞之间设有绝缘陶瓷。
上述方案中，所述绝缘导热装置为MgO陶瓷管，所述MgO陶瓷管套设于金属管内，所述PTC陶瓷组合卡设于MgO陶瓷管内。
上述方案中，所述绝缘导热装置包括隔离片和绝缘导热颗粒，所述隔离片间隔设置于金属管内壁；所述隔离片设有中孔和数个边孔，所述中孔用于将PTC陶瓷组合卡设在其中，所述绝缘导热颗粒填充于PTC陶瓷组合与金属管之间的空腔内。
上述方案中，所述绝缘导热颗粒为MgO沙。
上述方案中，所述金属管的材质为不锈钢、铜或铝。
发明发明发明发明发明发明发明
有益效果
1、金属管缩管后，压紧力很强，不会因长期的热胀冷缩引起金属管的膨胀，使功率 老化明显减小；
2、由于采用MgO沙填充在圆弧形电极片和金属管之间，或者使用MgO陶瓷管隔离在圆弧形电极片和金属管之间，在空间上实现了金属管和圆弧形电极片之间的隔离，由于不用绝缘纸作为绝缘层，不存在杂质磨损绝缘纸的情况，在设计上永久避免了绝缘强度的失效，使绝缘可靠性明显提高；
3、由于MgO沙紧密包裹在PTC陶瓷的周围，或者使用圆弧形电极片和金属管之间，MgO又是一种绝缘很好的材料，防止了PTC陶瓷上下电极在高压下的空气放电而造成的击穿；
4、由于金属管的两端采用硅胶塞和硅胶双重密封，使防水等级达IP68，彻底解决了PTC加热器的防水问题，甚至PTC加热器可以在水中长期工作；
5、采用散热鳍片套在金属管外面，可以将内部的热量充分散发出来；
6、采用和PTC陶瓷等宽的电极片，使电极片的边缘超出PTC陶瓷表面电极的边缘，从而避免PTC电极表面电弧产生，大大提高了可靠性，使加热器的使用寿命达20～30年以上。
附图说明
图1本发明实施例1的横向剖视结构示意图；
图2本发明PTC陶瓷组合的结构示意图；
图3为本发明实施例1纵向剖视图；
图4本发明实施例2的横向剖视结构示意图。
其中：1、PTC陶瓷组合；2、金属管；3、上电极片；4、下电极片；5、PTC陶瓷；6、隔离片；7、绝缘导热颗粒；8、散热片；9、硅胶塞；10、硅胶；11、绝缘陶瓷；12、MgO陶瓷管
具体实施方式
以下结合附图所示实施例对本发明作进一步的说明。
实施例1
参见图1至图3，一种通风型PTC加热器，包括PTC陶瓷组合1和金属管2，PTC陶瓷组合1包括上电极片3、下电极片4和PTC陶瓷5，上电极片3和下电极片4分别通过硅胶粘结剂粘结在PTC陶瓷5的上端面和下端面；一种通风型PTC加热器，还包括绝缘导热装置，本实施例的绝缘导热装置为隔离片6和绝缘导热颗粒7，隔离片6设计成齿轮状，间隔设置于金属管2的内壁，其中间设有中孔，用于将PTC陶瓷组合1卡设在其 内，凸出的部分实现金属管2和圆弧形电极片之间的隔离，凹进的部分为边孔，有利于沙的漏入。隔离片6主要用于隔离PTC陶瓷组合1和金属管2，PTC陶瓷组合1通过隔离片6设置在金属管2内，隔离片6对PTC陶瓷组合1起到定位支撑作用，隔离片6的厚度一般在5mm以内，使PTC陶瓷组合1和金属管2之间形成一个空腔，空腔内填充绝缘导热颗粒7。
上电极片3和下电极片4端截面的形状分别为圆弧形，圆弧形的弦与PTC陶瓷5粘结；使上电极片3、下电极片4和PTC陶瓷5的组合大致成圆形，与隔离片6内侧的形状相似，便于固定，与金属管2的形状相似，也便于热的传递。
绝缘导热颗粒7为MgO沙，实现空间隔离，也具有耐磨、耐氧化作用；为本发明较为优选的实施方式。
金属管2的外侧设置散热片8，增强了散热效果。
在金属管2内，PTC陶瓷组合1的两端由内侧至外侧的方向分别依次设置硅胶塞9和硅胶10，采用双层防水结构，使防水等级能够达到IP68。
在PTC陶瓷5两端，PTC陶瓷5与硅胶塞9之间设有绝缘陶瓷11，绝缘陶瓷11的长度较短，可参见附图比例长度。
优选的实施方式中，金属管2的材质为不锈钢、铜或铝。
端截面为圆弧形的上电极片3的端截面弦的长度和PTC陶瓷5的宽度相等，端截面为圆弧形的下电极片4的端截面弦的长度和PTC陶瓷5的宽度相等。
圆弧形电极片上设置1个小孔，以方便装配时固定使用，同时，可以通过螺丝拧在小孔内，方便安装引出线。
生产安装时，将PTC陶瓷5通过硅胶粘结在上下圆弧形铝电极片3、4之间(电极片两端分别放置绝缘陶瓷)，通过隔离片6定位在金属管2内，其中金属管2的一个端口用硅胶塞9封闭；然后用MgO沙填充在圆弧形电极片和金属管2之间作为绝缘层，再在金属管2另外一端用硅胶塞9封闭,；然后，用缩管工艺将金属管2缩管，使金属管2内的所有部件紧密压紧贴合，以保证良好的导热、导电性能；然后在金属管2两端用硅胶10密封,最后将散热片8套设在金属管2外而成。
实施例2
参见图4，本实施例中除了绝缘导热装置以外，其它结构均与实施例1相同。本实施例的绝缘导热装置为MgO陶瓷管12，MgO陶瓷管12套设于金属管2内，PTC陶瓷组合1卡设于MgO陶瓷管12内。
本实施例在生产安装时，将PTC陶瓷组合1安装在MgO陶瓷管12内，然后将MgO 陶瓷管12套设与金属管2内，将金属管2的两端用硅胶塞9封闭；然后用缩管工艺将金属管2缩管，使金属管2内的所有部件紧密压紧贴合，以保证良好的导热、导电性能；然后在金属管2两端用硅胶10密封,最后将散热片8套设在金属管2外而成。
本发明：
1、采用圆弧形电极片，片状的PTC陶瓷产生的热量通过圆弧形电极片传递到金属管的表面，实现了热量的高效传递；
2、MgO沙或MgO陶瓷管，实现了空间隔离,绝缘可靠性高，同时实现热量的传递；
3、两端采用了绝缘陶瓷，提高了电热管的可靠性；
4、采用散热片固定在圆管加热器上，增加散热效果；
5、采用硅胶塞，实现防水；
6、采用特制的隔离片，把PTC陶瓷组合固定定位在中间，同时绝缘导热颗粒又可以漏入；或者使用MgO陶瓷管直接固定PTC陶瓷组合。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用本发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于上述实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。

Claims (10)

  1. 一种通风型PTC加热器，包括PTC陶瓷组合和金属管，所述PTC陶瓷组合包括上电极片、下电极片和PTC陶瓷，所述上电极片和下电极片分别通过硅胶粘结剂粘结在PTC陶瓷的上端面和下端面，其特征在于，还包括绝缘导热装置，所述绝缘导热装置设置于PTC陶瓷组合与金属管之间，使PTC陶瓷组合隔离固定于金属管内。
  2. 根据权利要求1所述的通风型PTC加热器，其特征在于：所述上电极片和下电极片端截面的形状分别为圆弧形，所述圆弧形的弦与PTC陶瓷粘结。
  3. 根据权利要求2所述的通风型PTC加热器，其特征在于：所述端截面为圆弧形的上电极片的弦的长度和PTC陶瓷的宽度相等，所述端截面为圆弧形的下电极片的弦的长度和PTC陶瓷的宽度相等。
  4. 根据权利要求1所述的通风型PTC加热器，其特征在于：所述金属管的外侧设置散热片。
  5. 根据权利要求1所述的通风型PTC加热器，其特征在于：在所述金属管的两端由内侧至外侧的方向分别依次设置硅胶塞和硅胶。
  6. 根据权利要求5所述的通风型PTC加热器，其特征在于：在所述PTC陶瓷与硅胶塞之间设有绝缘陶瓷。
  7. 根据权利要求1～6任一所述的通风型PTC加热器，其特征在于：所述绝缘导热装置为MgO陶瓷管，所述MgO陶瓷管套设于金属管内，所述PTC陶瓷组合卡设于MgO陶瓷管内。
  8. 根据权利要求1～6任一所述的通风型PTC加热器，其特征在于：所述绝缘导热装置包括隔离片和绝缘导热颗粒，所述隔离片间隔设置于金属管内壁；所述隔离片设有中孔和数个边孔，所述中孔用于将PTC陶瓷组合卡设在其中，所述绝缘导热颗粒填充于PTC陶瓷组合与金属管之间的空腔内。
  9. 根据权利要求8所述的通风型PTC加热器，其特征在于：所述绝缘导热颗粒为MgO沙。
  10. 根据权利要求1～9任一所述的通风型PTC加热器，其特征在于：所述金属管的材质为不锈钢、铜或铝。
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CN109708300A (zh) * 2019-02-23 2019-05-03 深圳雅素达电子科技有限公司 一种陶瓷板发热体的制造方法和即热式流体加热装置
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WO2023209154A1 (fr) * 2022-04-29 2023-11-02 Valeo Systemes Thermiques Élément chauffant d'un corps de chauffe pour radiateur électrique centre dans un tube

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CN108097190A (zh) * 2017-11-30 2018-06-01 安徽依诺格实验室设备有限公司 一种实验室反应釜

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EP3416456A1 (de) * 2017-06-13 2018-12-19 Eberspächer catem GmbH & Co. KG Elektrische heizvorrichtung und ptc-heizelement für eine solche
CN109708300A (zh) * 2019-02-23 2019-05-03 深圳雅素达电子科技有限公司 一种陶瓷板发热体的制造方法和即热式流体加热装置
CN113905467A (zh) * 2021-11-04 2022-01-07 苏州法密利电子科技有限公司 一种改进型ptc加热器及其制备方法
CN113905467B (zh) * 2021-11-04 2023-08-01 苏州法密利电子科技有限公司 一种改进型ptc加热器及其制备方法
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