CN203026939U

CN203026939U - Novel surge protector

Info

Publication number: CN203026939U
Application number: CN 201320017129
Authority: CN
Inventors: 庞驰; 费自豪; 张雷
Original assignee: GUIYANG HIGH-TECH YIGE ELECTRONICS CO LTD
Current assignee: GUIYANG HIGH-TECH YIGE ELECTRONICS CO LTD
Priority date: 2013-01-14
Filing date: 2013-01-14
Publication date: 2013-06-26
Anticipated expiration: 2023-01-14

Abstract

The utility model discloses a novel surge protector which comprises a piezoresistor (2) positioned in a module box body (1), wherein an inner electrode A (3) and an inner electrode B (4) are respectively connected to two electrodes of the piezoresistor (2); a thermal separation point of the inner electrode B (4) is connected with a thermal separation elastic sheet (5); a thermal separation point region of the inner electrode B (4) is connected with an epoxy resin baffle (6); and except for the region of the epoxy resin baffle (6), the piezoresistor (2) and the inner electrode A (3) and the inner electrode B (4) which are connected with the piezoresistor (2) are encapsulated by liquid epoxy resin. The region of the thermal separation point of the inner electrode B is connected with the epoxy resin baffle; therefore, the two electrodes of the piezoresistor are connected with the inner electrodes and then capsulated by the liquid epoxy resin to realize an insulating effect; by the epoxy resin baffle, epoxy resin cannot flow into the region of the thermal separation point; subsequent connection of thermal separation elastic sheets can be facilitated; and the encapsulation efficiency and the product quality are improved.

Description

Novel surge protective device

Technical field

The utility model relates to a kind of novel surge protective device, belongs to votage limit type protection device technical field.

Background technology

Surge Protector is indispensable a kind of device in the electronic equipment lightning protection; the effect of Surge Protector is that the instantaneous overvoltage of scurrying into power line, signal transmssion line is limited in the voltage range that equipment or system can bear; or powerful lightning current is let out the inflow place, protect protected equipment or system are not hit and damage.Surge Protector is take the ZnO lightning-proof chip as main element; made up hot releasing mechanism etc.; have advantages of good non-linear behaviour and large through-current capability, be widely used in electronic circuit and electric power system as the lightning surge protection component, guaranteed the safe operation of equipment.

The disengaging of conventional Surge Protector and connection is to rely on heat to break away from shell fragment; heat breaks away from the mode of shell fragment by welding and is welded on wherein on an interior electrode; under long-time, the high power frequency function of current; the low temperature melts soldering tin; heat breaks away from shell fragment and the disengaging of interior electrode disconnects it, effectively prevents varistor catching fire under higher power-frequency overvoltage.

Two electrodes of the piezo-resistance of existing Surge Protector with need to make its insulation with the liquid-state epoxy resin embedding after interior electrode slice is connected, form the main protection device, for realizing that heat breaks away from the welding in zone, the existing mode that adopts is for first breaking away from the shell fragment welding with interior electrode and heat, carry out again the liquid-state epoxy resin embedding, this kind method is heated and is broken away from the impact of shell fragment, and welding is inconvenience comparatively; And heat can be broken away from shell fragment top coating after the liquid-state epoxy resin embedding, impact heat breaks away from the normal operation of shell fragment.

Summary of the invention

For the defects that exists in prior art, the Surge Protector that the technical problems to be solved in the utility model is to provide a kind of reliable operation, facilitates the liquid-state epoxy resin embedding, reliability is high can overcome the deficiencies in the prior art.

The utility model is by the following technical solutions: novel surge protective device, comprise the piezo-resistance that is positioned at the module box body, and be connected with respectively interior electrode A and interior electrode B at two electrodes of piezo-resistance, be connected with heat and break away from shell fragment on the hot dispersal point of interior electrode B; Hot dispersal point joint area in interior electrode B has the epoxy resin baffle plate, except the epoxy resin baffle area, and the interior electrode A of piezo-resistance and connection and the liquid-state epoxy resin embedding of interior electrode B.

Be hinged with the cut-out plate on the module box body, the stage casing that cuts off plate between heat breaks away from shell fragment and interior electrode B, the end be in extended state spring be connected, the other end of spring is fixed on the module box body.

The hot dispersal point of interior electrode B is positioned at zone line.

The height that removes the epoxy resin baffle plate is 1-2mm.

Compared with the prior art, the utility model is at the hot dispersal point joint area epoxy resin baffle plate of interior electrode B, after being connected with interior electrode slice, two electrodes of piezo-resistance just can first make its insulation with the liquid-state epoxy resin embedding like this, the setting of epoxy resin baffle plate just can guarantee that hot dispersal point zone can not flow into epoxy resin, be convenient to the connection that follow-up heat breaks away from shell fragment, thereby can improve packaging efficiency and product quality, and can guarantee that heat breaks away from the welding procedure of shell fragment.Move to the central area of piezoresistive element in power frequency breakdown point with piezoresistive element, the power frequency breakdown point position of hot dispersal point and piezoresistive element is overlapped, like this can shortening heat conduction distance, improve the response speed that piezo-resistance heat breaks away from.Break away from heat and adopted the cut-out plate of holding with spring between electrode and piezo-resistance, when the low temperature melts soldering tin, cut off plate and can cut off rapidly issuable electric arc link circuit under the effect of spring, further improved the reliability of hot disengaging.Have larger surface area because heat breaks away from electrode, when product overload operation or product quality descend and can quick heat-collector when causing temperaturing lifting abnormality, shortened low temperature scolding tin fusing time, effectively eliminated the hidden danger of short circuit breaking out of fire.Owing to being provided with the sensitive switch shifting block and showing window, therefore not only realized remote alarms, but also can onsite alarming, thereby but reminding user in time repair or replace, reach the purpose of stopping the lightning protection device catching fire.

Description of drawings:

Accompanying drawing 1 is the structure chart of Surge Protector.

Accompanying drawing 2 is state diagrams of each part of Surge Protector installation site.

In figure, 1 module box body; 2 piezo-resistances; 3 interior electrode A; 4 interior electrode B; 5 heat break away from shell fragment; 6 epoxy resin baffle plates; 7 cut off plate; 8 extension springs; Electrode lead-out pins 9, external electrode 10.

Embodiment:

embodiment 1, as illustrated in fig. 1 and 2, the present embodiment core piezo-resistance 2 is the square chip of 34 * 34mm, the pressure sensitive voltage of pressure sensitive voltage 2 is 620V, its power frequency breakdown point is at the chip middle part, two electrodes of piezo-resistance 2 connect respectively interior electrode A 3 and interior electrode B 4, hot dispersal point joint area in interior electrode B 4 has epoxy resin baffle plate 6, the height that removes epoxy resin baffle plate 6 is 1-2mm, like this when making its insulation with the liquid-state epoxy resin embedding, be subjected to stopping except epoxy resin baffle plate 6, except epoxy resin baffle plate 6 zones, piezo-resistance 2 and the interior electrode A 3 that connects and 4 all the other the zone liquid-state epoxy resin embeddings of interior electrode B, form the main protection device, an electrode of piezo-resistance 2 is connected on heat disengaging shell fragment 5 with low temperature scolding tin by the hot dispersal point at interior electrode B 4 middle parts, the fusing point of low temperature scolding tin is 110 ℃-150 ℃.Heat breaks away from shell fragment 5 and links together by spot welding with electrode lead-out pins 9.Electrode A 3 is connected with external electrode 10 by scolding tin in another of piezo-resistance 2, and external electrode 10 connects by connector in the circuit of outside required protection.be hinged with on module box body 1 and cut off plate 7, the stage casing that cuts off plate 7 breaks away between shell fragment 5 and interior electrode B 4 in heat, the end be in extended state spring 8 be connected, the other end of spring 8 is fixed on module box body 1, for a long time, under the high power frequency function of current, the low temperature melts soldering tin, heat breaks away from shell fragment 5 and breaks away from hot dispersal point, cutting off plate 7 moves downward under spring 8 pulling force effects, intercepted the electrical connection of electrode lead-out pins 9 with interior electrode B 4 fully, having cut off issuable electric arc connects, sensitive switch action simultaneously, the red colour code that cuts off plate 7 other ends blocks and shows window, remote alarms and onsite alarming are provided.

After the employing said structure, physics of the present utility model and unit for electrical property parameters are as follows:

The above refers to that embodiment only is preferred embodiment of the present utility model; be not to limit practical range of the present utility model with this; therefore the equivalence that all shapes according to the utility model, structure and principle are done changes, and all should be covered by in protection range of the present utility model.

Claims

1. novel surge protective device, comprise the piezo-resistance (2) that is positioned at module box body (1), two electrodes in piezo-resistance (2) are connected with respectively interior electrode A (3) and interior electrode B (4), be connected with heat and break away from shell fragment (5) on the hot dispersal point of interior electrode B (4); It is characterized in that: the hot dispersal point joint area in interior electrode B (4) has epoxy resin baffle plate (6), and except epoxy resin baffle plate (6) zone, piezo-resistance (2) and the interior electrode A (3) and the interior electrode B (4) that connect are used the liquid-state epoxy resin embedding.

2. novel surge protective device according to claim 1; it is characterized in that: be hinged with on module box body (1) and cut off plate (7); the stage casing that cuts off plate (7) is positioned at that heat breaks away between shell fragment (5) and electrode B (4), the end be in extended state spring (8) be connected, the other end of spring (8) is fixed on module box body (1).

3. novel surge protective device according to claim 1, it is characterized in that: the hot dispersal point of interior electrode B (4) is positioned at zone line.

4. novel surge protective device according to claim 2 is characterized in that: except the height of epoxy resin baffle plate (6) is 1-2mm.