CN205751735U

CN205751735U - A kind of varistor of organic alloy type double protection

Info

Publication number: CN205751735U
Application number: CN201620649537.5U
Authority: CN
Inventors: 江淑惠
Original assignee: ZHANGZHOU YABAO ELECTRONIC CO Ltd
Current assignee: Zhangzhou Yabao Electronics Co.,Ltd.
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2016-11-30
Anticipated expiration: 2026-06-27

Abstract

The utility model discloses the varistor of a kind of organic alloy type double protection, including housing, varistor MOV, major loop alloy-type temperature fuse TCO1, pin, minor loop organic type Thermal Cutoffs TCO2 and heat conduction embedding silica gel it is provided with in described housing, described varistor MOV, major loop alloy-type temperature fuse TCO1 and minor loop organic type Thermal Cutoffs TCO2 are by heat conduction embedding silica gel in enclosure interior, and described housing is provided above upper cover.This utility model uses organic type Thermal Cutoffs as remote signalling warning or indicative function, the metal shell heat transfer efficiency of organic type Thermal Cutoffs described under this scene is applied is better than porcelain tube type Temperature protection, varistor abnormal heating amount can be utilized faster, shorten Thermal Cutoffs movement time, varistor overtemperature is carried out effective, indicate in time, make varistor use safety and reliability.

Description

A kind of varistor of organic alloy type double protection

Technical field

This utility model is about the piezoresistive surge protector in lightning protection field, is specifically related to a kind of organic The varistor of alloy-type double protection.

Background technology

Varistor MOV due to special conductive characteristic and cheap and be widely used in electrical appliance and other In electronic product, play the effects such as overvoltage protection, lightning protection, surge current suppression, amplitude limit, de-noising, protection semiconductor components and devices.

During life-time service, due to its shelf-life and external factor, as made moist, leakage current increase cause MOV heating, The reasons such as sustained overvoltage, MOV the most inevitably there will be aging deterioration phenomenon.When aging deterioration is to certain After degree, MOV shows leakage current and increases, and caloric value continues to increase, and body temperature rises, and varistor is the most breakdown leads Cause catching fire.It is thus desirable to MOV to be carried out Thermal protection, traditional way be by an alloy-type temperature Thermal Cutoffs and MOV series connection and Thermal Cutoffs are against MOV side, and the two is potted in same shell or by resin-encapsulate together, MOV is different Often adstante febre, heat is transmitted on Thermal Cutoffs, and when temperature rises to Thermal Cutoffs operating temperature, Thermal Cutoffs melts Disconnected, MOV is disconnected from the circuit, thus protects MOV, one can also be arranged by described alloy-type temperature fuse simultaneously Second Thermal Cutoffs for heat monitoring varistor of independent circuits, as remote alarms or instruction.On existing market Second Thermal Cutoffs is generally adopted by alloy-type porcelain tube structure, is primarily present and is disadvantageous in that, second temperature is protected Danger silk pin does not contact with varistor surface, and varistor abnormal heating amount the most only passes by Thermal Cutoffs porcelain tube surface It is delivered on the low-melting alloy silk of electric fuse, however low, therefore relative to first Thermal Cutoffs by porcelain tube thermal conduction rate Carry out book often delay disconnection or break not open and do not have and report to the police in time or indicative function.

Utility model content

In order to solve above-mentioned the deficiencies in the prior art, the utility model proposes the pressure of a kind of organic alloy type double protection Quick resistance.

This utility model adopts the following technical scheme that the varistor of a kind of organic alloy type double protection, including housing, Varistor MOV, major loop alloy-type temperature fuse TCO1, pin, minor loop organic type temperature it is provided with in described housing Electric fuse TCO2 and heat conduction embedding silica gel, described varistor MOV, major loop alloy-type temperature fuse TCO1 and minor loop have Type Thermal Cutoffs TCO2 is by heat conduction embedding silica gel in enclosure interior, and described housing is provided above upper cover, described Varistor MOV by chip body, with chip body by silver slurry sintering together with a MOV metal electrode and the 2nd MOV gold Belonging to electrode to constitute, described major loop alloy-type temperature fuse TCO1 is by low-melting alloy silk, the first major loop alloy-type temperature Electric fuse TCO1 pin, the second major loop alloy-type temperature fuse TCO1 pin, alloy are fluxed disconnected agent and outer protecting shell body structure thereof Becoming, described second major loop alloy-type temperature fuse TCO1 pin and a MOV metal electrode are connected, described 2nd MOV gold Belonging to electrode to be connected with pin, described minor loop organic type Thermal Cutoffs TCO2 is by organic temperature-sensitive block, spring, starlike reed, pottery Porcelain insulator, metal shell, for the first time loop organic type Thermal Cutoffs TCO2 pin and second time loop organic type temperature are protected Danger silk TCO2 pin is constituted.

As preferably, described first major loop alloy-type temperature fuse TCO1 pin, pin, for the first time loop organic type Thermal Cutoffs TCO2 pin and second time loop organic type Thermal Cutoffs TCO2 pin all extend to the outside of housing.

Compared with prior art, this utility model has the advantages that

This utility model uses organic type Thermal Cutoffs as remote signalling warning or indicative function, institute under this scene is applied The metal shell heat transfer efficiency of the organic type Thermal Cutoffs stated is better than porcelain tube type Temperature protection, can utilize pressure-sensitive electricity faster Resistance abnormal heating amount, shortens Thermal Cutoffs movement time, varistor overtemperature is carried out effective, indicate in time, make pressure-sensitive electricity Resistance uses safety and reliability.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.

Fig. 1 is the circuit diagram of the varistor of a kind of organic alloy type double protection that this utility model provides；

Fig. 2 is the front view of embodiment in this utility model；

Fig. 3 is the rearview of embodiment in this utility model；

Fig. 4 is example structure schematic diagram of the present utility model.

Wherein: 1. housing；2. varistor MOV；3a. the first varistor MOV metal electrode；3b. second is pressure-sensitive Resistance MOV metal electrode；4. major loop alloy-type temperature fuse TCO1；5a. the first major loop alloy-type temperature fuse TCO1 pin；5b. the second major loop alloy-type temperature fuse TCO1 pin；6. pin；7. minor loop organic type temperature is protected Danger silk TCO2；8a. loop organic type Thermal Cutoffs TCO2 pin for the first time；8b. second time loop organic type Temperature protection Silk TCO2 pin；9. heat conduction embedding silica gel；10. upper cover.

Detailed description of the invention

For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, below In conjunction with detailed description of the invention, this utility model is expanded on further.

Refering to shown in Fig. 1-3, the varistor of a kind of organic alloy type double protection, including housing 1, in described housing 1 It is provided with varistor MOV2, major loop alloy-type temperature fuse TCO14, pin 6, minor loop organic type Thermal Cutoffs TCO27 and heat conduction embedding silica gel 9, described varistor MOV2, major loop alloy-type temperature fuse TCO14 and minor loop are organic Type Thermal Cutoffs TCO27 is internal in housing 1 by heat conduction embedding silica gel 9 embedding, and described housing 1 is provided above upper cover 10, Described varistor MOV2 by chip body, with chip body by the MOV metal electrode 3a and the together with silver slurry sintering Two MOV metal electrode 3b are constituted, and described major loop alloy-type temperature fuse TCO14 is by low-melting alloy silk, the first major loop Alloy-type temperature fuse TCO1 pin 5a, the second major loop alloy-type temperature fuse TCO1 pin 5b, alloy are fluxed disconnected agent And outer protecting shell body is constituted, a described second major loop alloy-type temperature fuse TCO1 pin 5b and MOV metal electrode 3a Being connected, described 2nd MOV metal electrode 3b is connected with pin 6, and described minor loop organic type Thermal Cutoffs TCO27 is by organic sense Temperature block, spring, starlike reed, ceramic insulator, metal shell, for the first time loop organic type Thermal Cutoffs TCO2 pin 8a and Loop organic type Thermal Cutoffs TCO2 pin 8b is constituted for the second time.

It should be noted that described first major loop alloy-type temperature fuse TCO1 pin 5a, pin 6, return for the first time Road organic type Thermal Cutoffs TCO2 pin 8a and second time loop organic type Thermal Cutoffs TCO2 pin 8b all extends to shell The outside of body 1.

When this utility model major loop alloy-type temperature fuse TCO14 environment temperature rises to its operating temperature, its Low-melting alloy silk fuses, and circuit is by permanent cut-out；When organic type Thermal Cutoffs TCO27 environment temperature rises to the dynamic of it When making temperature, organic temperature-sensitive block melts, and spring is released so that starlike reed and pin depart from, thus turn-off current path； Embedding heat conductive silica gel 9 in the varistor housing of organic alloy type double protection, described embedding heat conductive silica gel 9 has high heat conduction Coefficient, is filled in described major loop alloy-type temperature fuse TCO14, minor loop organic type Thermal Cutoffs TCO27 and institute Gap between the voltage dependent resistor chip stated, quickly can be transmitted to described master by heat from described voltage dependent resistor chip surface In loop alloy-type temperature fuse TCO14, minor loop organic type Thermal Cutoffs TCO27, it addition, when described varistor During abnormal heating, when described alloy-type temperature fuse quick fuse is to cut off circuit, volume will expand, and described embedding is led Hot silica gel has certain elasticity, and when can produce deformation to prevent described alloy-type temperature fuse from fusing, expansion bursts； Major loop alloy-type temperature fuse TCO14 and minor loop organic type Thermal Cutoffs TCO27 is respectively provided with and stretches out described leading The pin of hot silica gel shell；

Major loop alloy-type temperature fuse TCO14 selects temperature range to be 100 ~ 135 DEG C, and current range is 10A ~ 40 A, maximum discharge current (8/20 μ s dash current) is 6 ~ 60 kA.

Minor loop organic type Thermal Cutoffs TCO27 selects temperature range to be 100 ~ 135 DEG C.

Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.One's own profession Skilled person will appreciate that of industry, this utility model is not restricted to the described embodiments, described in above-described embodiment and description Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model is also Have various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model Claimed scope is defined by appending claims and equivalent thereof.

Claims

1. the varistor of an organic alloy type double protection, it is characterised in that: include that housing (1), described housing set in (1) It is equipped with varistor MOV (2), major loop alloy-type temperature fuse TCO1 (4), pin (6), minor loop organic type Temperature protection Silk TCO2 (7) and heat conduction embedding silica gel (9), described varistor MOV (2), major loop alloy-type temperature fuse TCO1 (4) and Minor loop organic type Thermal Cutoffs TCO2 (7) is internal in housing (1) by heat conduction embedding silica gel (9) embedding, described housing (1) Be provided above upper cover (10), described varistor MOV (2) by chip body, with chip body by silver slurry sintering together with Oneth MOV metal electrode (3a) and the 2nd MOV metal electrode (3b) are constituted, described major loop alloy-type temperature fuse TCO1 (4) by low-melting alloy silk, the first major loop alloy-type temperature fuse TCO1 pin (5a), the second major loop alloy-type temperature Flux disconnected agent and outer protecting shell body thereof of electric fuse TCO1 pin (5b), alloy is constituted, described second major loop alloy-type temperature insurance Silk TCO1 pin (5b) is connected with a MOV metal electrode (3a), and described 2nd MOV metal electrode (3b) is connected with pin (6), Outside described minor loop organic type Thermal Cutoffs TCO2 (7) is by organic temperature-sensitive block, spring, starlike reed, ceramic insulator, metal Shell, for the first time loop organic type Thermal Cutoffs TCO2 pin (8a) and second time loop organic type Thermal Cutoffs TCO2 pin (8b) constitute.

The varistor of a kind of organic alloy type double protection the most according to claim 1, it is characterised in that: described first Major loop alloy-type temperature fuse TCO1 pin (5a), pin (6), for the first time loop organic type Thermal Cutoffs TCO2 pin (8a) outside of housing (1) is all extended to second time loop organic type Thermal Cutoffs TCO2 pin (8b).