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Temperature fuse assembly

A technology of thermal fuses and components, applied in electrical components, circuits, emergency protection devices, etc., can solve problems such as excessive AC or DC current, inability to cut off and protect circuits, etc., to achieve the effect of improving the safe cut-off voltage

Pending Publication Date: 2021-06-15
辛家毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the deficiency that the current temperature fuse cannot cut off and protect the circuit due to excessive AC or DC current and voltage, and provides a temperature fuse, which is suitable for thermal fuse components with excessive AC or DC, so as to ensure that the thermal fuse Under DC conditions, the switch components can effectively and safely break higher current and voltage circuits to ensure equipment and personal safety

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1, such as figure 2 As shown, more than one suitable negative temperature coefficient ceramic NTC thermistor is connected in parallel at both ends of the temperature fuse F1. When the temperature fuse F1 is first disconnected, the current is quickly transferred to the negative temperature coefficient ceramic NTC thermistor. The current of the fuse F1 drops rapidly between electric shocks, so as to give the temperature fuse F1 enough disconnection time to ensure safe and effective cut-off of the circuit.

[0024] In this embodiment, the negative temperature coefficient ceramic NTC thermistor is connected across the two ends of the insulating sleeve of the temperature fuse F1, such as figure 2 shown. The negative temperature coefficient ceramic NTC thermistor has a resistance value of 1-50 ohms at room temperature; under normal operating temperature conditions, the temperature fuse F1 works normally, and the current mainly passes through the temperature fuse, a...

Embodiment 2

[0025] Example 2 as image 3 As shown, in this embodiment, a positive temperature coefficient PTC ceramic thermistor is connected in parallel at both ends of the temperature fuse F1. When the temperature fuse F1 starts to disconnect, the current is quickly transferred to the positive temperature coefficient PTC ceramic thermistor. , The current between the thermal fuse F1 and the electric shock drops rapidly, so as to give the thermal fuse enough disconnection time to ensure safe and effective cut-off of the circuit.

[0026] In this embodiment, the positive temperature coefficient ceramic PTC thermistor is connected across the two ends of the insulating sleeve of the temperature fuse F1, such as image 3 shown. The positive temperature coefficient ceramic PTC thermistor has a resistance value of 1-50 ohms at room temperature; under normal operating temperature conditions, the temperature fuse F1 works normally, and the current mainly passes through the temperature fuse F1 an...

Embodiment 3

[0027] Example 3 as Figure 4 As shown, an ultra-fine metal wire resistor R is connected in parallel at both ends of the temperature fuse, and the material of the ultra-fine metal wire is silver, copper, tungsten, palladium, silver-tungsten alloy or copper-tungsten alloy. When the thermal fuse F1 starts to disconnect, the current is quickly transferred to the ultra-fine wire resistor R, and the current between the thermal fuse F1 and the electric shock drops rapidly, thus giving the thermal fuse F1 enough disconnection time to ensure safety Effectively cuts the circuit.

[0028] In the embodiment provided by the present invention, such as figure 2 As shown, the ultra-fine wire resistance R is connected across the two ends of the insulation sleeve of the temperature fuse F1. The diameter of the metal wire in the ultra-fine wire resistance R is 0.01-0.55mm; the resistance is 1 milliohm-2000 milliohms, which can be cut off safely 36-450V / 10-40A AC and DC circuits.

[0029] In...

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Abstract

The invention relates to a temperature fuse assembly. A temperature fuse is also called as a thermal fuse, the two ends of the temperature fuse are further connected in parallel with a shunt resistor, and when the temperature fuse starts to be disconnected, current is quickly transferred to the shunt resistor. According to the temperature fuse assembly, by using the shunting resistor such as a positive temperature coefficient ceramic thermistor, a negative temperature coefficient ceramic thermistor and a superfine metal wire, the safe cut-off voltage of the temperature fuse is greatly improved, so that the temperature fuse can safely cut off higher alternating current or direct current voltage, and a high-voltage and high-current over-temperature protection function is realized.

Description

technical field [0001] The invention relates to the field of thermal fuses, in particular to a thermal fuse assembly. Background technique [0002] Temperature fuse (fuse) (also known as thermal fuse, thermal fuse) means that under a certain rated current, when the temperature exceeds the specified value, the ambient temperature plus the heat generated by itself will cause the temperature fuse to blow, thereby making the circuit Disconnect; an overheating circuit protector made using this principle. Thermal fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As overheat protectors for short circuit and overcurrent, they are one of the most commonly used protection devices. [0003] At present, the temperature fuse includes a temperature fuse housing, related parts assembled in the temperature fuse housing, the connection pin of the temperature fuse, specifically including the housing; floating nails, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/02
CPCH01H85/0241
Inventor 辛家毅
Owner 辛家毅
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