An electrical device and a thermal fuse with high current surge resistance and arc extinguishing performance

Abstract

The utility model provides an electrical device and a temperature fuse with high current surge resistance and arc extinguishing performance, and relates to the technical field of temperature fuses. At the moment of arcing, under the action of the magnetic field force of a magnetic steel, the arc deviates upward or downward. Since transverse ribs and longitudinal ribs are arranged on an insulating partition, and the insulating partition is made of ceramic or bakelite material with good insulating performance, the arc is cut, isolated and cooled, thereby achieving the purpose of arc extinguishing.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature fuses, in particular to an electrical device and a temperature fuse with high current surge resistance and arc extinguishing performance. Background Art

[0002] A thermal fuse is a component that cuts off the power circuit by fusing itself when an electrical appliance fails and causes abnormal temperature, thereby protecting the safety of the entire circuit. The thermal fuse has the characteristics of accurate fusing temperature, high voltage resistance, small size and low cost. When the power is disconnected or connected, it will generate an instantaneous surge current. In a capacitive or inductive circuit, this surge current is often many times or even dozens of times larger than the normal steady-state current, which can easily cause serious damage to the temperature-sensitive alloy or even fuse; therefore, the fuse is required to have the ability to withstand large surge currents. In a higher voltage DC circuit, an arc that is difficult to extinguish will be generated when the alloy is disconnected, which can easily burn the product, affect the safety of other devices in the entire circuit, and endanger the safety of life and property.

[0003] Ordinary fuses currently on the market will melt or even explode when surge current is generated, and cannot effectively protect the circuit; under working conditions, the internal alloy will melt and the arc between the endpoints will continue to burn, causing the product to burn.

[0004] In view of this, this application is filed. Utility Model Content

[0005] The utility model provides an electrical device and a temperature fuse with high current surge resistance and arc extinguishing performance, which can at least partially improve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A temperature fuse with high current surge resistance and arc extinguishing performance, comprising: a shell, and an alloy component, an insulating partition, a connecting component, a connecting electrode, an electronic wire component, a special grease, and a magnetic steel arranged inside the shell;

[0008] Among them, the temperature-sensitive alloy of the alloy component passes through the insulating partition and is welded to the connecting electrode to obtain the connecting component, the electronic wire component is welded to the connecting component, the special grease completely wraps the alloy component, the magnetic steel abuts against the inside of the outer shell, and the first end of the electronic wire component is used to connect to the electrical equipment.

[0009] Preferably, the connecting electrode is provided with an alloy welding terminal and an electron wire welding terminal.

[0010] Preferably, the insulating partition is provided with transverse ribs, longitudinal ribs and four matching holes.

[0011] Preferably, the alloy assembly includes four temperature-sensitive alloys, which are connected in parallel. Each of the temperature-sensitive alloys passes through a matching hole on the insulating partition and is welded to the alloy welding end on the connecting electrode to form the connecting assembly.

[0012] Preferably, it further comprises resin, and the resin is arranged above the special grease.

[0013] Preferably, a magnetic steel assembly groove and an anti-counterfeiting grease rib are provided on the outer shell, the magnetic steel is arranged on the magnetic steel assembly groove, the magnetic steel is configured to apply a magnetic field force to the arc under high voltage and high current conditions, and the anti-counterfeiting grease rib is configured to increase the joint surface area with the resin.

[0014] Preferably, the electronic wire assembly comprises a right electronic wire and a left electronic wire, the right electronic wire is welded to one electronic wire welding end on the connecting electrode, and the left electronic wire is welded to another electronic wire welding end on the connecting electrode.

[0015] The utility model also discloses an electrical device, which comprises a device body and a temperature fuse with high current surge resistance and arc extinguishing performance as described in any one of the above items, wherein the temperature fuse with high current surge resistance and arc extinguishing performance is arranged on the device body.

[0016] To sum up, the temperature fuse with high current surge resistance and arc extinguishing performance is provided with an arc extinguishing magnet, and neodymium iron boron material with strong magnetic properties is selected. At the moment of arcing, the arc is deflected upward or downward under the action of the magnetic field force of the magnet. Since transverse and longitudinal ribs are provided on the insulating partition, and the insulating partition is made of ceramic or bakelite material with good insulating properties, the arc is cut, isolated and cooled under the action of the magnetic field force to extinguish the arc, thereby achieving the purpose of arc extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure explosion of a thermal fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of magnetic steel arc extinguishing of a temperature fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the connecting electrode structure of a thermal fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the shell structure of a thermal fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the insulating partition structure of a thermal fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of a connection assembly of a temperature fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of alloy disconnection of a temperature fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model;

[0024] Figure 8 The utility model is a schematic diagram of the internal structure of a thermal fuse with high current surge resistance and arc extinguishing performance provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] Please refer to the Figure 1 and Figure 8 The utility model discloses a temperature fuse with high current surge resistance and arc extinguishing performance, which comprises: a shell 5, and an alloy component, an insulating partition 6, a connecting component 8, a connecting electrode 3, an electronic wire component, a special grease 10, and a magnetic steel 1 arranged inside the shell 5;

[0028] Among them, the temperature-sensitive alloy 4 of the alloy component passes through the insulating partition 6 and is welded to the connecting electrode 3 to obtain the connecting component 8, the electronic wire component is welded to the connecting component 8, the special grease 10 completely wraps the alloy component, the magnetic steel 1 abuts against the inside of the outer shell 5, and the first end of the electronic wire component is used to connect to the electrical equipment.

[0029] See also Figure 3 Preferably, the connecting electrode 3 is provided with an alloy welding terminal 31 and an electron wire welding terminal 32 .

[0030] See also Figure 5 Preferably, the insulating partition plate 6 is provided with a transverse partition rib 61 , a longitudinal partition rib 63 and four matching holes 62 .

[0031] See also Figure 6 Preferably, the alloy assembly includes four temperature-sensitive alloys 4, which are connected in parallel. Each of the temperature-sensitive alloys 4 passes through the matching hole 62 on the insulating partition 6 and is respectively welded to the alloy welding end 31 on the connecting electrode 3 to form the connecting assembly 8.

[0032] Preferably, it further comprises a resin 9 , and the resin 9 is arranged above the special grease 10 .

[0033] See also Figure 4 Preferably, a magnetic steel assembly groove 51 and an anti-counterfeiting special grease rib 52 are provided on the shell 5, and the magnetic steel 1 is arranged on the magnetic steel assembly groove 51. The magnetic steel 1 is configured to apply a magnetic field force to the arc under high voltage and high current conditions, and the anti-counterfeiting special grease rib 52 is configured to increase the bonding surface area with the resin 9.

[0034] Preferably, the electronic wire assembly includes a right electronic wire 2 and a left electronic wire 7 , the right electronic wire 2 is welded to one electronic wire welding end 32 on the connecting electrode 3 , and the left electronic wire 7 is welded to another electronic wire welding end 32 on the connecting electrode 3 .

[0035] In this embodiment, four temperature-sensitive alloys 4 pass through the matching holes 62 on the insulating partition 6 and are respectively welded to the alloy welding ends 31 on the connecting electrode 3 to form a connecting assembly 8; since multiple temperature-sensitive alloys are connected in parallel, when a large surge current passes through, the large current is diverted, so that each alloy will not be disconnected due to the high temperature of the current, thereby resisting surge current and avoiding the risk of premature disconnection of the temperature-sensitive alloy.

[0036] The right electronic wire 2 is welded to a connecting electrode electronic wire welding end 32 on the connecting assembly 8; the left electronic wire 7 is welded to another connecting electrode electronic wire welding end 32 on the connecting assembly 8; and the whole is assembled into the housing 5. The bottom of the housing 5 is injected with special grease 10 (special resin) to completely wrap the temperature-sensitive alloy 4. When the product temperature reaches the set temperature, the temperature-sensitive alloy 4 softens, and under the tension of the high-temperature liquid special grease 10, the temperature-sensitive alloy 4 is disconnected and shrinks to both sides, thereby disconnecting the two ends.

[0037] The magnetic steel 1 is in close contact with the magnetic steel assembly groove 51 in the housing 5. Under high voltage and high current conditions, when the temperature-sensitive alloy 4 is disconnected and contracted, arcing is very likely to occur when the distance between the disconnected endpoints 11 is small. The magnetic field around the magnetic steel 1 will exert a magnetic field force (Lorentz force) on the arc, causing the arc to deflect (blow the arc). When the arc is blown onto the insulating partition 6, the arc is cut and rapidly cooled, thereby extinguishing. The housing 5 is provided with anti-fading special grease ribs 52 to increase the joint surface area with the resin 9 and improve the product sealing performance.

[0038] See also Figure 2 and Figure 7 In summary, the high current surge resistance and arc extinguishing performance temperature fuse is provided with an anti-fleeting special grease rib 52 on the shell 5, which increases the joint surface area with the resin 9, improves the product sealing performance, and reduces the risk of the special grease 10 expanding and overflowing due to heat at high temperature; and in a limited space, 4 temperature-sensitive alloys are arranged in parallel, and the large current is shunted through the parallel shunt principle to improve the product's surge and high current resistance performance; finally, the high current surge resistance and arc extinguishing performance temperature fuse is provided with an arc extinguishing magnetic steel 1, and the NdFeB material with strong magnetic properties is selected. At the moment of arcing, under the action of the magnetic field force of the magnetic steel 1, the arc deviates upward or downward. Since the insulating partition 6 is provided with a transverse partition rib 61 and a longitudinal partition rib 63, and the insulating partition 6 is a ceramic or bakelite material with good insulation performance, under the action of the magnetic field force blowing the arc, the arc is cut, isolated and cooled, thereby achieving the purpose of arc extinguishing.

[0039] The utility model also discloses an electrical device, which comprises a device body and a temperature fuse with high current surge resistance and arc extinguishing performance as described in any one of the above items, wherein the temperature fuse with high current surge resistance and arc extinguishing performance is arranged on the device body.

[0040] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

Claims

1. A thermal fuse with high current surge resistance and arc extinguishing performance, characterized in that: include: A shell, and alloy components, insulating partitions, connecting components, connecting electrodes, electronic wire components, special grease, and magnetic steel arranged inside the shell; Among them, the temperature-sensitive alloy of the alloy component passes through the insulating partition and is welded to the connecting electrode to obtain the connecting component, the electronic wire component is welded to the connecting component, the special grease completely wraps the alloy component, the magnetic steel abuts against the inside of the outer shell, and the first end of the electronic wire component is used to connect to the electrical equipment.

2. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 1, characterized in that: The connecting electrode is provided with an alloy welding terminal and an electron wire welding terminal.

3. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 2, characterized in that: The insulating partition is provided with transverse partition bars, longitudinal partition bars and four matching holes.

4. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 3, characterized in that: The alloy assembly includes four temperature-sensitive alloys, which are connected in parallel. Each of the temperature-sensitive alloys passes through a matching hole on the insulating partition and is respectively welded to the alloy welding end on the connecting electrode to form the connecting assembly.

5. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 1, characterized in that: It also includes a resin, and the resin is arranged above the special grease.

6. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 5, characterized in that: The shell is provided with a magnetic steel assembly groove and an anti-counterfeiting special grease rib, the magnetic steel is arranged on the magnetic steel assembly groove, the magnetic steel is configured to apply a magnetic field force to the arc under high voltage and high current conditions, and the anti-counterfeiting special grease rib is configured to increase the joint surface area with the resin.

7. A thermal fuse with high current surge resistance and arc extinguishing performance according to claim 2, characterized in that: The electronic wire assembly comprises a right electronic wire and a left electronic wire. The right electronic wire is welded to one electronic wire welding end on the connecting electrode, and the left electronic wire is welded to another electronic wire welding end on the connecting electrode.

8. An electrical device, characterized in that: It comprises a device body and a thermal fuse with high current surge resistance and arc extinguishing performance as claimed in any one of claims 1 to 7, wherein the thermal fuse with high current surge resistance and arc extinguishing performance is arranged on the device body.

Images