WO2012089124A1 - 一种温度保险丝与电阻结合的装置 - Google Patents

一种温度保险丝与电阻结合的装置 Download PDF

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Publication number
WO2012089124A1
WO2012089124A1 PCT/CN2011/084826 CN2011084826W WO2012089124A1 WO 2012089124 A1 WO2012089124 A1 WO 2012089124A1 CN 2011084826 W CN2011084826 W CN 2011084826W WO 2012089124 A1 WO2012089124 A1 WO 2012089124A1
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Prior art keywords
resistor
thermal fuse
fuse
temperature
wire
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PCT/CN2011/084826
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English (en)
French (fr)
Inventor
徐忠厚
许由生
朱烜辉
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厦门赛尔特电子有限公司
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Application filed by 厦门赛尔特电子有限公司 filed Critical 厦门赛尔特电子有限公司
Priority to KR1020137018197A priority Critical patent/KR20140040081A/ko
Priority to US13/977,672 priority patent/US9240300B2/en
Priority to JP2013546579A priority patent/JP2014501435A/ja
Priority to EP11853301.7A priority patent/EP2660828B1/en
Publication of WO2012089124A1 publication Critical patent/WO2012089124A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/0039—Means for influencing the rupture process of the fusible element
    • H01H85/0047—Heating means
    • H01H85/0052—Fusible element and series heating means or series heat dams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
    • H01C3/20—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding wound on cylindrical or prismatic base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0205—Switches using a fusible material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/165—Casings

Definitions

  • the invention relates to an overcurrent and overtemperature double protection resistor, wherein the device is an integrated rapid response structure of a resistor and a temperature fuse, and the outer shape is equivalent to a wire winding, a carbon film and a metal film resistor of the same power, and is used for household appliances.
  • the power supply of IT power supply equipment, lighting fixtures, etc., with overheat protection can also be used as a heating element with overheat protection.
  • the invention further relates to a temperature fuse with a self-heating function, which can be used for the stalling fault protection of a motor such as a power tool or an electric fan; when the motor is blocked, the current makes the temperature fuse self-heating and disconnects at a much faster speed than the motor.
  • the heating rate of the coil ensures that the motor is not damaged by overheating before the temperature fuse is disconnected, which is an effective protection for overheating of the motor.
  • the wirewound resistor also has an overcurrent fuse function
  • the resistor wire used is a high melting point alloy. Only when the rated current of more than twenty times passes, the wire of the wire wound resistor can be heated to fuse, so that the wire can be embodied. Fault current fuse function around the resistor.
  • the current flowing through the wirewound resistor often fails to reach the fusing current, which causes the fuse characteristic of the wirewound resistor to fail to be reflected. At this time, the temperature of the wirewound resistor can reach 300 ⁇ 500 degrees.
  • micro-heaters such as aromatherapy devices and liquid electric mosquito coils used in life require a safe temperature fuse for overheat protection for safety.
  • the current installation method is to connect the resistors and the thermal fuses in series and mount them together in a ceramic. Inside the box, it is filled with a curable insulating material, but since it is too bulky, during the heat preservation process, the ceramic body dissipates too much heat and wastes electrical energy.
  • motors such as power tools and electric fans have six times the normal current when the motor is blocked. At this time, the motor generates heat faster, so it is necessary to use a temperature fuse to cut off the current to avoid overheating and fire. It is desirable to reduce the operating temperature of the thermal fuse to improve agility, but since the motor often experiences a slight degree of overload or voltage fluctuations, it is not desirable to disconnect the thermal fuse at this time, thus creating the operating temperature of the thermal fuse. contradiction.
  • the invention provides a resistor applied to an input end of a high-frequency charger, which uses an alloy wire as a resistor, which not only functions as a resistor but also protects a large current fuse, and is built in the base of the wire-wound resistor.
  • a thermal fuse is connected in series with the resistor. When the wirewound resistor heats up to the rated temperature, the built-in thermal fuse is blown to ensure over-temperature protection.
  • the invention relates to a wire-wound resistor with a built-in thermal fuse, which is designed to change a ceramic matrix of a solid wire wound resistor into a hollow body, in which a thermal fuse is built in, which becomes a thermal fuse
  • the outer casing, and a lead of the thermal fuse passes through the end cap of the length of the wire wound resistor, and the two are closely connected to form a series structure, and the other wire of the thermal fuse is passed through the end cover of the other end of the wire wound resistor
  • the outer extension also extends a lead on the wire wound resistor end cap with an opening, and then encapsulates the entire product with epoxy resin.
  • the wire-wound resistor of the built-in thermal fuse designed by the invention can be directly installed in the existing high-frequency charger as a basic unit, instead of the existing simple wirewound resistor or the wirewound protected by the thermal fuse.
  • the resistor functions as a general impedance function, excessive current fuse protection, and over-temperature protection when overloaded.
  • the resistance of the wirewound resistor is set at 0.5 ⁇ , and the temperature of the matched thermal fuse is used in the motor of the power tool at 150 degrees.
  • the temperature fuse with rated current is 2A, when the normal working current is 0.5.
  • the temperature of the fuse that causes the temperature fuse to feel will rise by about 5 °C, but when the motor is blocked, the current will reach 3A, so the heat generated by the resistor will cause the temperature fuse to heat up quickly, so the thermal fuse will be damaged in the motor coil. Disconnected before.
  • the wirewound resistor is changed to a carbon film or a metal film resistor, so that the resistance value can be greatly mentioned, and it can be used for the micro heat generating body, and it can be fixed in a ceramic small tube to form an aroma.
  • the heating body of the liquid electric mosquito-repellent incense can be placed in a liquid diffusion rod such as a perfume, so that the heat of the heating body can be absorbed by the liquid such as perfume.
  • the existing method uses a ceramic structural member. One side of the ceramic structural member has a hole for the diffusion rod, and the other side has a cavity for loading a heating resistor and a thermal fuse. And sealed with a curable insulation material.
  • the power of the heating body of the existing method is about 2.2 W, and the power required for the heating body is about 1 W, so that the heating temperature of the resistor body can also be lowered. Therefore, the stability of the resistance of the resistor body will be greatly improved, the evaporation speed of the perfume will be stable for a long time, and the influence of the change of the ambient temperature will be greatly reduced.
  • the power of each aromatherapy device is reduced by 1W, it will save 9KW per year. If there are 50 million aromatherapy devices such as aromatherapy devices and liquid electric mosquitoes in the world, it can save 45,000 KW of electricity and greatly reduce carbon emissions. It is.
  • Figure 1 is a circuit diagram of Embodiment 1;
  • FIG. 2A is a structural diagram of a built-in thermal fuse of Embodiment 1;
  • FIG. 2B is a structural diagram of a built-in thermal fuse of Embodiment 2;
  • 3A is a schematic external view of a wound wire wound resistor of Embodiment 1;
  • Figure 3B is a schematic view showing the outline of the wound wire wound resistor of Embodiment 2;
  • Figure 4A is an outline view showing the practical application of the product of Embodiment 1;
  • Figure 4B is an outline view of the product of the embodiment 1 with the wire-wound resistor and the common end of the thermal fuse removed;
  • Figure 5 is a schematic view showing the heating of the aromatherapy device of the product of the specific embodiment 3;
  • Figure 6 is a structural diagram of the resistance of the built-in organic temperature sensing type temperature fuse of the fourth embodiment of the present patent.
  • Figure 7 is a schematic structural view of an organic temperature sensing type temperature fuse built in the fourth embodiment of the present patent.
  • FIG. 2 FIG. 2A, FIG.
  • FIG. 1 is a mobile phone, MP3 switching power supply charger circuit, in which a combination of a thermal fuse and a resistor of the present invention is applied; in FIG. 2A, a low melting alloy wire 3 is soldered to a lead 2b, 2a of a thermal fuse.
  • the fluxing agent 4 which helps the alloy wire to be rapidly contracted on both sides to cut the alloy wire during melting is formed, and after being formed into a whole at normal temperature, it is placed in the ceramic tube 1 and at both ends of the ceramic tube. The seal is cured with epoxy 6 so that it is made into a complete thermal fuse.
  • the metal caps 5a, 5b are fastened to both ends of the ceramic tube 1 of the thermal fuse to form a solid whole.
  • the center of the metal cap 5b is provided with an extended lip which is connected to the lead 2b of the thermal fuse.
  • a thermal fuse and a wirewound resistor are formed.
  • the relationship is in series.
  • the center hole of the metal cap 5a is large, so that the lead 2a of the thermal fuse can pass through the middle and form a certain gap.
  • the epoxy resin 6 is cured, the creepage distance between the lead 2a and the metal cap 5a is increased. It is a safe distance.
  • FIG. 4 and 5 are actual installation shapes of the patented product
  • FIG. 4B is a circuit structure in which a temperature fuse is connected in series with a wire wound resistor, and one end enters one end.
  • Figure 1 This is the actual application of the short circuit diagram of the patented product in the high frequency charger, which reflects the over temperature protection mode of the wirewound resistor.
  • FIG. 2B and FIG. 3B it differs from the embodiment in that the thermal fuse and the wirewound resistor are disposed in a parallel circuit, and the wirewound resistor is wound on the ceramic casing of the thermal fuse, but the two-terminal metal of the wirewound resistor The leads of the terminals (5a, 5c) are not connected to the leads of the thermal fuses.
  • the following table shows the protection effect data of the thermal fuse of the wirewound resistor of the first embodiment.
  • the wirewound resistor of 10 ⁇ /2W is often used.
  • the temperature fuse of 221°C is used as the overheat protection, the external and built-in type
  • the comparison of the breaking speeds of the structure of Embodiment 1 is as follows. If the single wirewound resistance of the protection is not increased, the long-time high surface temperature will be a safety hazard when the current value in the table is passed.
  • the specific structure is the same as that of the first embodiment.
  • the combination of the resistance value and the temperature value different from the embodiment 1 is used to form the heat generation of the wire wound resistor to accelerate the disconnection function of the temperature fuse, and is mainly applied to the over temperature protection of the motor.
  • the wirewound resistance value used in the structure of Embodiment 1 is set at 0.5 ⁇ , and the temperature of the mated temperature fuse is used in a motor of a power tool at 150 degrees, for example, a temperature fuse having a rated current of 2 A, when a normal operating current is used.
  • the resistance causes the temperature fuse to feel the temperature of the fuse will rise by about 5 ° C, but when the motor is blocked, the current will reach 3A, so the heat generated by the resistor will cause the temperature fuse to heat up quickly, so the temperature fuse will be on the motor
  • the coil is disconnected before it is damaged, preventing the motor coil from being burnt and improving the reuse value.
  • the surface alloy wire resistance is changed to the carbon film or the metal film resistor 22, and the resistance is increased to several thousand ohms or more to form a micro-heater.
  • It is 21 in the figure (5); an aromatizer made of the micro-heater 21 with a built-in thermal fuse, which comprises a micro-heater 21, a casing 23 of the micro-heater, a diffusion rod 24, a sealing ring 25, and a perfume bottle 26.
  • the outer casing 23 of the built-in microheat generator 21 is inserted into the diffusion rod 24, and the diffusion rod 24 is inserted into the perfume bottle 26 through the sealing ring 25 to form an aromatizer.
  • the power consumption of the embodiment can save about 50% of the power consumption compared with the prior art.
  • a thermal fuse 30 having an organic substance as a temperature sensing body is built in (the principle structure is as shown in FIG. 7), and the metal tube 1 is fastened to the metal cap 5a at both ends thereof. 5b, forming a solid whole.
  • the center of the metal cap 5b is provided with an extended lip which is tightly connected to the lead 2b of the thermal fuse 30.
  • the resistance alloy wire of the wirewound resistor is soldered to the metal cap 5b, a thermal fuse and a wire winding are formed.
  • the series relationship of the resistors The center hole of the metal cap 5a is large, so that the lead 2a of the thermal fuse 30 can pass through the middle and form a certain gap.
  • the creepage distance between the lead 2a and the metal cap 5a is Increased the safety distance. If the shape of the metal cap 5b is made like the metal cap 5a, the lead 2b of the thermal fuse 30 can also pass through the middle and form a certain gap, after the epoxy resin 6 is cured, between the lead 2b and the metal cap 5b. The creepage distance is increased to a safe distance. At this time, the resistor and the thermal fuse have no electrical connection, and only the heat is quickly transmitted.
  • the invention can be directly installed in the existing high-frequency charger as a basic unit, and replaces the existing simple wirewound resistor or the wirewound resistor protected by the temperature fuse, and has a general impedance function.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Details Of Resistors (AREA)

Description

一种温度保险丝与电阻结合的装置 技术领域
本发明涉及一种过流、过温双重保护的电阻，其装置为电阻和温度保险丝一体化快速反应结构，其外形尺寸等同于同功率的线绕、碳膜、金属膜电阻，用于家用电器、IT通信设备、照明灯具等电源的具有过热保护的阻抗，也可作为具有过热保护的发热体。
本发明又涉及一种带有自加热功能的温度保险丝，可用于电动工具、电风扇等电机的堵转故障保护；当电机堵转时，电流使温度保险丝自升温断开的速度大大快于电机线圈的升温速度，从而保障电机在温度保险丝断开前不因过热而损坏，作为电机过热的有效保护。
背景技术
随着微电子设备的广泛应用，特别是移动通信设备的普及，电池的充电装置就成了使用移动设备的必需。人们往往采用高频电路来设计生产充电器。以便于携带和自动适应AC100V~240V的市电电压的需要，于是充电器的安全性能就显得尤为重要。具有过流、过温双重保护的限流电阻是高频电路安全的关键元器件。本文所述的产品就是适应这种需求而产生，并能可靠、快速反应达到其安全性能。
虽然线绕电阻也具有过流的熔断功能，但其所采用的电阻丝是高熔点合金，只有在二十倍以上额定电流通过时才能使线绕电阻的合金丝发热至熔断，从而才能体现线绕电阻的故障电流保险丝功能。然而，在实际应用中当负载异常时流经线绕电阻的电流往往达不到熔断电流，导致线绕电阻的熔断特性功能未能体现出来,此时线绕电阻的温度却能达到300~500度的程度，严重危害充电器的安全，于是人们就采用外靠式地串联一只温度保险丝合并置于一个陶瓷盒内，当温度保险丝感受到线绕电阻热量至温度保险丝的额定温度时，温度保险丝断开，从而切断了电路。但这种在线绕电阻旁边外靠式地串联温度保险丝的做法，必需在PCB板上，占用2个位置，需要4个焊盘。
另者，生活中所用的香薰器、液体电蚊香等微加热器，为了安全，需要安全温度保险丝来作为过热保护，现行的安装方法是将电阻和温度保险丝的单体串联，一起安装在一个陶瓷盒内，并用可固化的绝缘材料填充，但此后做法体积过大，在保温过程中，陶瓷体的散热过多，浪费了电能。
再者，电动工具、电风扇等电机，由于电机在堵转时的电流是平常工作的六倍，此时电机的发热较快，就需要用温度保险丝来切断电流以避免过热而起火，并不希望将温度保险丝的动作温度降低以提高敏捷性，但由于电机工作时常常会出现轻微程度的过负荷或电压波动，此时并不希望温度保险丝断开，这样就产生了设置温度保险丝动作温度的矛盾。
一种新型的、体积更小、结构一体化、安装方便的温度保险丝与电阻一体化的共生体就应运而生了，同样的结构就可以改善以上三者的难题。
发明内容
本发明提出一种应用于高频充电器的输入端的电阻，其采用合金丝作为电阻，既发挥了电阻的功能，也起到了大电流熔断的保护功能，在该线绕电阻的基体中，内置了一只温度保险丝，电路上与电阻串联成一体，当线绕电阻发热到额定温度时，内置的温度保险丝熔断，确保了过温保护的功能。
本发明涉及一种内置温度保险丝的线绕电阻的设计是，将原本实心的线绕电阻的陶瓷基体更改为空心的，在该陶瓷基体中，内置了一只温度保险丝，该瓷管成为温度保险丝的外壳，而温度保险丝的一引线穿过线绕电阻的一段的端盖时两者紧密相连，形成了串联结构，而温度保险丝的另一段引线透过线绕电阻的另一端开口的端盖向外延伸，在这带有开口的线绕电阻端盖上也对外伸出一引线，然后再用环氧树脂将整只产品包封。
本发明所设计内置温度保险丝的线绕电阻，能够作为一个基础单元，直接安装在现有的高频充电器中，替代现有的简单的线绕电阻、或者是外靠温度保险丝保护的线绕电阻，起到了一般性的阻抗功能、过大电流熔断保护、过载时起到过温保护的三重功能。
按照以上结构采用的线绕电阻阻值设在0.5Ω，而配合的温度保险丝的温度在150度使用于电动工具的电机中，以额定电流为2A的温度保险丝为例，当常规工作电流为0.5A时，电阻导致温度保险丝感受的温度保险丝将升高约5℃，但电机堵转时，电流将达到3A，这样电阻所产生的热量将使温度保险丝快速升温，于是温度保险丝将于电机线圈损坏之前断开。
再者，同样按照以上的结构，将线绕电阻改为碳膜或金属膜电阻，这样阻值就可以大大提到，可用于微发热体，将其固定于一个陶瓷小管中，即可形成香薰器、液体电蚊香器的加热体，可置身于香水等液体扩散棒中，于是此款加热体的发热量可以全部被香水等液体吸收。而现有的方式则是用一个陶瓷结构件，陶瓷结构件的一侧有个可箍住扩散棒的孔，另一侧则有个容腔，可以装入一只发热电阻和一只温度保险丝，并用可固化的绝缘材料封口。这两种方式相比，在保证香水蒸发速度同等的状态下，现有的方式的加热体功率约2.2W，而本的加热体所需功率约需1W，这样电阻体的发热温度也可降低，于是电阻体的阻值的稳定性将会大大提升，香水的蒸发速度就会长久稳定，而且受环境温度的变化的影响也会大大减小。当每只香薰器功率减小1W，每年将可节约用电9KW，如果全球有5000万只香薰器、液体电蚊香器等发热体在工作的话，即可节约45000KW的电力，大大减低了碳排放了。
附图说明
附图1是实施例1的电路图;
附图2A是实施例1的内置温度保险丝结构图;
附图2B是实施例2的内置温度保险丝结构图;
附图3A是实施例1缠绕线绕电阻的外形示意图;
附图3B是实施例2缠绕线绕电阻的外形示意图;
附图4A是实施例1的产品实际应用的外形图;
附图4B是实施例1去掉线绕电阻与温度保险丝公共端引线的产品外形图;
附图5是本具体实施例3产品应用香薰器加热的示意图；
附图6是本专利具体实施例4的内置有机物感温型温度保险丝的电阻结构图；
附图7是本专利具体实施例4内置的有机物感温型温度保险丝的原理结构图。
具体实施方式
实施例1：
以下结合附图１、图2A、图3A对本发明的具体实施方式1进行进一步的叙述，在其中，所陈述的是为了说明本发明的优选具体实施方式目的，而不是为了限制上述的目的。
图1为手机、MP3开关电源充电器电路，在电路中应用了本发明的温度保险丝和电阻的结合装置;在图2A中，温度保险丝的引线2b，2a中，焊接了低熔点的合金丝3，在合金丝3 的周围，填充了帮助合金丝在熔化时向两边需迅速收缩从而切断合金丝的助熔断剂4，在常温下三者形成一个整体后，置放于陶瓷管1当中，并在陶瓷管两端用环氧树脂6固化封口，这样就制作成一只完整的温度保险丝。
如图2A所示，当上述的温度保险丝成型后，将金属帽5a、5b紧扣在温度保险丝的陶瓷管1的两端，形成一个牢靠的整体。金属帽5b的中心设有外延的唇边，此唇边将与温度保险丝的引线2b连接，当金属帽5b上焊接着线绕电阻的阻抗合金丝后，就形成了温度保险丝和线绕电阻的串联关系了。金属帽5a的中心孔较大，好让温度保险丝的引线2a能从中间穿过，并形成一定的间隙，在环氧树脂6固化后，引线2a和金属帽5a之间的爬电距离就加大到了安全距离。
当上述的温度保险丝的陶瓷管1的两端紧紧地套上金属帽5a、5b后，就形成了线绕电阻的基本基体了，可在这个基本上，进行阻抗合金丝7的绕线，此阻抗合金丝7的两端将被电焊在金属帽5a、5b上，此后，必需在金属帽5a上又焊接上引线8作为线绕电阻的输出端，最后再用环氧树脂9将整只产品包封起来。这样，一只内置温度保险丝的线绕电阻就制作出来了，如图3A所示。
附图4、5是本专利产品的实际安装体型，图4B为温度保险丝与线绕电阻串联，一端进一端出的电路结构。附图1这是本专利产品在高频充电器中实际应用短路图，体现了线绕电阻的过温保护模式。
实施例2：
如图2B、图3B所示：其与实施例不同之处在于，温度保险丝与线绕电阻设于平行电路中，线绕电阻缠绕在温度保险丝的陶瓷外壳上，但线绕电阻的二端金属端冒（5a、5c）的引线与温度保险丝的引线互不连接。
实施例3
以下表格为实施例1线绕电阻采用温度保险丝的保护效果数据，在高频电源中，常采用10Ω/2W的线绕电阻，当采用221℃的温度保险丝作为过热保护，外靠式与内置式(即实施例1结构)的断开速度的对比如下，如果不增加保护的单一线绕电阻，在通以表格中的电流值时，其长时间的高表面温度将是个安全隐患。
序号 测试电流 A 外靠式电阻表面温度 ℃ 外靠式温度保险丝断开时间 S 内置式电阻表面温度 ℃ 内置式温度保险丝断开时间 S
1 0.5 142 600S 未断 145 600S 未断
2 0.5 139 600S 未断 142 600S 未断
3 0.5 146 600S 未断 148 600S 未断
4 0.5 143 600S 未断 145 600S 未断
5 0.6 175 36S 176 18S
6 0.6 174 37S 177 19S
7 0.6 178 36S 176 18S
8 0.6 176 39S 178 18S
9 0.7 189 26S 190 8S
10 0.7 187 27S 192 7S
11 0.7 190 23S 193 8S
12 0.7 188 24S 189 7S
13 0.8 211 14S 215 1.2S
14 0.8 209 16S 212 1.0S
15 1 234 8S 238 0.2S
16 1 232 9S 242 0.2S
实施例4
具体结构同实施例1，采用不同于实施例1 的阻值和温度值的搭配，形成以线绕电阻的发热来加速温度保险丝的断开功能，主要应用于电机的过温保护中。按照实施例1结构采用的线绕电阻阻值设在0.5Ω，而配合的温度保险丝的温度在150度使用于电动工具的电机中，以额定电流为2A的温度保险丝为例，当常规工作电流为0.5A时，电阻导致温度保险丝感受的温度保险丝将升高约5℃，但电机堵转时，电流将达到3A，这样电阻所产生的热量将使温度保险丝快速升温，于是温度保险丝将于电机线圈损坏之前断开，防止电机线圈被烧毁，提升再利用价值。以下数据可以进一步说明：
序号 熔断电流A 模拟线圈温度℃ 线绕电阻表面温度℃ TCO 断开时间 耐电压
1 0.5 62.8 74.9 长时间未断开 　
2 0.5 63.1 75.4 长时间未断开 　
3 0.5 62.9 75.8 长时间未断开 　
4 1 63.6 90.2 长时间未断开 　
5 1 63.8 90.8 长时间未断开 　
6 1 63.9 91.4 长时间未断开 　
7 1.5 64.5 107.4 长时间未断开 　
8 1.5 64.6 106.9 长时间未断开 　
9 1.5 64.7 107.8 长时间未断开 　
10 2 65.4 132.5 58 500V 未击穿
11 2 65.5 132.1 52 500V 未击穿
12 2.5 66.7 162.7 7 500V 未击穿
13 2.5 66.4 160.2 6 500V 未击穿
14 3 69.4 167.5 3 500V 未击穿
实施例5
具体结构同实施例1，如图4B所示的结构，将其表面合金丝电阻更改为碳膜或金属膜电阻22，并将阻值增加到几千欧姆以上，就可形成微发热器,表示为图（5）中的21；由内置温度保险丝的微发热器21制成的香薰器，其包括微发热器21、微加热器的外壳23、扩散棒24、密封圈25、香水瓶26。将内置微发热器21的外壳23插入扩散棒24内，并将扩散棒24透过密封圈25插入香水瓶26中，形成香薰器。
电阻发热对比测试报告
发热电阻安装模式 测试电压 通过电流 实际功率 电阻阻值Ω 表面温度℃ 扩散棒温度℃
电阻外靠 130 ℃ 温度保险丝后瓷壳封装 120VAC 18.52mA 2.2W 6.5K 97.5 89.6
电阻外靠 130 ℃ 温度保险丝后瓷壳封装 120VAC 18.51mA 2.2W 6.5K 94.3 88.2
电阻外靠 130 ℃ 温度保险丝后瓷壳封装 120VAC 18.55mA 2.2W 6.5K 95.6 87.9
电阻外靠 130 ℃ 温度保险丝后瓷壳封装 120VAC 18.52mA 2.2W 6.5K 96.8 86.5
电阻外靠 130 ℃ 温度保险丝后瓷壳封装 120VAC 18.53mA 2.2W 6.5K 95.8 87.9
　 　 　 　 　 　 　
电阻 + 内置温度保险丝 120VAC 10.4mA 1.25W 11.5K 92 92
电阻 + 内置温度保险丝 120VAC 10.4mA 1.25W 11.5K 90.8 90.8
电阻 + 内置温度保险丝 120VAC 10.4mA 1.25W 11.5K 93.2 93.2
电阻 + 内置温度保险丝 120VAC 10.4mA 1.25W 11.5K 92.7 92.7
电阻 + 内置温度保险丝 120VAC 10.4mA 1.25W 11.5K 91.8 91.8
通过以上数据对比，当扩散棒的温度相同时，本实施例的功率消耗比现有技术能节约用电约50%。
具体实施方式6
如图6所示，在陶瓷管1中，内置了一个以有机物为感温体的温度保险丝30(其原理结构如图7所示)，而陶瓷管1的两端紧扣着金属帽5a、5b，形成一个牢靠的整体。金属帽5b的中心设有外延的唇边，此唇边将与温度保险丝30的引线2b紧密连接，当金属帽5b上焊接着线绕电阻的阻抗合金丝后，就形成了温度保险丝和线绕电阻的串联关系了。金属帽5a的中心孔较大，好让温度保险丝30的引线2a能从中间穿过，并形成一定的间隙，在环氧树脂6固化后，引线2a和金属帽5a之间的爬电距离就加大到了安全距离。如果将金属帽5b的形状制成如同金属帽5a，也让温度保险丝30的引线2b能从中间穿过，并形成一定的间隙，在环氧树脂6固化后，引线2b和金属帽5b之间的爬电距离就加大到了安全距离,此时的电阻与温度保险丝就没有电的连接，只有热的快速传递了。
当上述的陶瓷管1的两端紧紧地套上金属帽5a、5b后，就形成了线绕电阻的基本基体了，可在这个基本上，进行阻抗合金丝7的绕线，此阻抗合金丝7的两端将被电焊在金属帽5a、5b上，此后，必需在金属帽5a上又焊接上引线8作为线绕电阻的输出端，最后再用环氧树脂9将整只产品包封起来。这样，一只内置有机物感温型温度保险丝的线绕电阻就制作出来了。也可以将陶瓷管1外表面的线绕电阻制成碳膜电阻或金属膜电阻或厚膜电阻,形成不用功率的带有过温保护的电阻。
工业实用性
本发明能够作为一个基础单元，直接安装在现有的高频充电器中，替代现有的简单的线绕电阻、或者是外靠温度保险丝保护的线绕电阻，起到了一般性的阻抗功能、过大电流熔断保护、过载时起到过温保护的三重功能。

Claims (9)

  1. 一种将温度保险丝与电阻结合的装置，其特征在于将原本实心的线绕电阻的陶瓷基体更改为空心的，在该陶瓷基体中，内置一只温度保险丝，该瓷管成为温度保险丝的外壳，温度保险丝的一引线穿过线绕电阻的一端的端盖引出，温度保险丝的另一端透过线绕电阻的另一端的端盖向外延伸，线绕电阻端盖也对外伸出引线，然后再用环氧树脂将整只产品包封。
  2. 根据权利要求1所述的一种将温度保险丝与电阻结合的装置，其特征在于温度保险丝的一引线穿过线绕电阻的一端的端盖两者相连，形成了串联结构。
  3. 根据权利要求2所述的一种将温度保险丝与电阻结合的装置，其特征在于温度保险丝的两引线之间低熔点的合金丝周围，填充有帮助合金丝在熔化时向两边需迅速收缩从而切断合金丝的助熔断剂，在常温下三者形成一个整体，置放于陶瓷管中。
  4. 根据权利要求2所述的一种将温度保险丝与电阻结合的装置，其特征在于所述的内置温度保险丝的线绕电阻，能够作为一个基础单元，直接安装在现有的高频充电器中。
  5. 根据权利要求2所述的一种将温度保险丝与电阻结合的装置，其特征在于采用电阻阻值和保险丝温度值的搭配，形成以线绕电阻的发热来加速温度保险丝的断开功能，应用于电机的过温保护。
  6. 根据权利要求2所述的一种将温度保险丝与电阻的结合的装置，其特征在于将其表面合金丝电阻是碳膜或金属膜电阻，并将阻值增加到几千欧姆以上，形成带有过温保护的发热电阻器。
  7. 根据权利要求1所述的一种将温度保险丝与电阻结合的装置，其特征在于电阻的两端端盖均开口，温度保险丝的两引线均透过开口的端盖向外伸出，而电阻的两端盖上均对外引出一引线，再用环氧树脂将整个产品包裹，形成的温度保险丝与电阻两个相互平行的电路，实现用不同的电路来加热切断温度保险丝。
  8. 根据权利要求1所述的一种将温度保险丝与电阻结合的装置，其特征在于用环氧树脂将整个产品包封绝缘，或用硅树脂或无机包封材料作为绝缘层。
  9. 根据权利要求1所述的一种将温度保险丝与电阻的结合的装置，其特征在于电阻的瓷基体为两端开口;或是单边开口，另一边封闭只开一个空洞使引脚向外伸出。
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US20130293343A1 (en) 2013-11-07
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