JP3142835U - Varistor with alloy-type thermal fuse - Google Patents

Abstract

The present invention integrates a varistor and an alloy-type thermal fuse, has a high heat transfer speed, can be easily assembled during use, is convenient, and can rapidly melt molten alloy with the action of an alloy solvent. Depending on different requirements, you can choose alloys with different melting points and different dimensions, and make varistors of various standards for different current varistors. Provides varistors with wide alloy-type thermal fuses.
A varistor, a molten alloy type thermal fuse, and a container are provided, the varistor and an alloy type thermal fuse are installed inside the container, and the surfaces thereof are in close contact, and the lead wire is drawn out of the container. In this case, an alloy solvent is placed in a container.
[Selection] Figure 5

Description

  The present invention relates to a zinc oxide varistor and a varistor with an alloy type thermal fuse to which overvoltage protection is applied.

  Varistors have been widely applied as overvoltage protection and surge absorption elements for various electric circuits, electrical equipment, and electronic devices as having excellent nonlinear current-voltage characteristics. Varistors are used in both power and electrical circuits. If various types of instantaneous overvoltages occur frequently, the varistors protect the electrical equipment and elements by controlling the overvoltage values through frequent operations and absorbing and consuming surge energy. Therefore, the function of the varistor is inevitably caused from deterioration to inoperability, and when a temporary overvoltage is received, a part of the varistor may run away and cause a fire.

  For conventional varistors with inoperable protection properties, the main defects are: Firstly, there is a heat protection type varistor which is complicated to assemble and is disclosed in, for example, a traditional mold rapid heat dissipation device or a Chinese utility model CN02222055.0. Next, the speed responsiveness of the thermal fuse as the heat protection configuration is slow, or the shock resistance against excessive current is weak, and the inoperability easily occurs. For example, a traditional spring leaf heat dissipation device has a small outer frustomer spherical temperature fuse and an outer alloy temperature fuse, or the heat published in Chinese utility model CN00237913.9 There are protective type varistors.

  An object of the present invention is to provide a varistor with an alloy type thermal fuse which has a simple and compact structure, a fast response speed, and a wide range of applications and which can be automatically disabled.

  In order to achieve the above object, the varistor with the alloy type thermal fuse of the present invention has the structure of this principle. The present invention makes use of the advantages of an alloy type thermal fuse to construct a varistor that can automatically protect against inoperability by integrating the varistor and the thermal fuse.

  In the present invention, specific means for solving the problems has the following configuration.

  The present invention includes a varistor, an alloy-type thermal fuse, and a container. The varistor and the alloy-type thermal fuse are arranged side by side inside the container, and the lead wire is brought close to one surface and the lead wire is the container. The container is drawn out and filled with an alloy solvent in a container.

  The container has one case with an opening, and stores a varistor and an alloy-type thermal fuse side by side, is filled with an alloy auxiliary solvent, and is provided with an epoxy seal at the opening above the container. It is.

  In the present invention, specific means for solving the problems also have the following configuration.

  The present invention includes a varistor, an alloy-type thermal fuse, and a container, the alloy-type thermal fuse is installed in one small case, and the small case and the varistor are arranged side by side inside the container and are small. One outer wall of the case and both surfaces of the varistor are in close contact with each other, the lead wire is drawn out of the case, and a small case is filled with an alloy solvent.

  The container has one case with an opening, and has one projection with the front wall of the case extending to the outside to provide a small case installation space, and an epoxy sealant is provided in the case opening. And configured as a container.

  The alloy-type thermal fuse is a single low melting point alloy yarn having lead wires at both ends thereof.

  The small case is a case made of a ceramic envelope or other high heat conduction and high insulation material, and at least one wall is provided on a flat surface. An alloy-type thermal fuse was first installed in a small case. Small case is manufactured with ceramic envelope or other high heat conduction and high insulation material, then it can prevent solvent saving and solvent material volatilization, and also has the function to extinguish arc light and increase insulation performance be able to.

  The present invention can manufacture various products by a circuit based on the above basic configuration.

  In the present invention, when two lead wires are used, one lead wire of the alloy type thermal fuse is connected to one lead wire of the adjacent varistor, and the contact is sealed inside the case so that the varistor and the alloy type Another lead wire of the thermal fuse was separated and pulled out of the container.

  In the present invention, when there are three lead wires, two lead wires of the varistor are pulled out of the container, and one lead wire of the varistor adjacent to the temperature fuse is one of the alloy type thermal fuses. Connected to one lead wire, the contact was sealed inside the case, and another lead wire of the alloy type thermal fuse was drawn out of the container.

  In the present invention, when there are four lead wires, the two lead wires of the varistor and the alloy type thermal fuse are drawn out of the container, but are not connected to each other.

  In the present invention, when the varistors are connected in series, there are two varistors installed inside the case, and the two lead wires of the alloy type thermal fuse installed between the two varistors are close to each other Each varistor is connected to one lead wire, the contact is sealed inside the case, the two varistors are connected in series by the thermal fuse, and the other lead wire is connected to the container. Each was pulled out and configured.

  In the present invention, when the varistors are arranged in parallel, there are two varistors installed inside the container, and each lead wire on the opposite surface is connected to each other. Connected to one lead wire, the contact is sealed inside the case, the two varistors are in parallel, the thermal fuse is sandwiched between the two varistors, the other of the two varistors The other two lead wires and the other one lead wire of the alloy type thermal fuse “may be two lead wires” are respectively drawn out to the outside of the container.

  When the present invention has an alarm function, an alarm that operates according to a constant temperature characteristic is arranged near the varistor and the alloy type thermal fuse inside the container, and has two types of normal open or normal close.

  In the present invention, when a spare varistor has a function to start, there is also a switching device that can be switched from a normally open to a normally closed with a constant operating temperature characteristic in addition to the varistor inside the seal container and the alloy type thermal fuse. When the standby varistor and this switching device are continuously connected to the circuit in series, and this switching device is switched from the normally open state to the normally closed state, the standby varistor moves directly and normally to the circuit. Thus, this spare varistor can also make a spare varistor having the following starting function.

  Products with different configurations can be created by the concept of the present invention. For example, two or more varistors are configured in series or in parallel.

  In the present invention, the varistor and the thermal fuse are made as one body, the heat transfer speed is fast, and the assembly is simple and convenient when in use. Then, the alloy melted by the action of the alloy solvent quickly shrinks to the lead wire and becomes round. In the present invention, different melting points are selected depending on each application, and various varistors are prepared according to varistors of different flow rates by using alloys of different sizes, thereby widening the application range.

  In the present invention, the various configurations created can satisfy various functions at the same time. First, in various configurations manufactured by the present invention, it is possible to meet the demand for absorbing a surge voltage and the demand for a varistor having a pulsating current having a different surge voltage and a different pressure-sensitive voltage. Second, if the varistor operates frequently and controls excessive voltage amplitude values or absorbs surge energy and wears down, the performance deteriorates and becomes inoperable, the various configurations made by the present invention are varistors. The inoperative protection function is activated when the leakage current of the battery drops to 10 mA. (Although the inoperability protection function is activated even at a lower leakage current, the current should be reduced appropriately.) Third, when the varistor withstands overvoltage, the leakage current of the varistor has dropped below about 300 mA. Thus, in various configurations produced by the present invention, the inoperable protection function is activated before the varistor is destroyed. If the leakage current becomes higher and exceeds 10 amps (A), the various configurations made by the present invention will start the inoperability protection function immediately after destroying the varistor. Fourthly, the various configurations produced by the present invention can improve the consumption and absorption of surge energy.

  As described above, according to the present invention, the varistor and the thermal fuse are integrally formed so that the heat transfer rate is high, and the assembly is simple and convenient at the time of use. Then, the alloy melted by the action of the solvent quickly shrinks and rounds to the lead wire. The present invention selects a different melting point depending on each application, and creates various varistors according to varistors of various currents by using alloys having different dimensions, thereby widening the application range.

Example 1
FIG. 2A is an assembly view in basic assembly mode 1 of the present invention. In FIG. 2A, a case 1, a varistor 2 and an alloy-type thermal fuse 4 are provided, the surfaces of the varistor 2 and the alloy-type thermal fuse 4 are arranged in close contact with each other, and a solvent is contained in the case 1. 7 is inserted, and the opening of case 1 is sealed with epoxy sealant 6 on top of solvent 7 to form a sealed container, with varistor lead wire 3 and fuse lead wire 5 protruding outside the case 1 opening. It is that.

  In use, when the varistor 2 generates heat due to various factors, the amount of heat is transmitted to the surrounding solvent 7 through its surface, and the amount of heat is transmitted to the alloy-type thermal fuse 4 by the auxiliary fusing agent 7, so that the alloy is melted by heat. Then, it quickly contracts to both fuse leads 5 by the action of the solvent 7 (shown in FIGS. 1A and 2B), interrupts the electric circuit, and separates the deteriorated varistor 2 from the electric circuit.

Example 2
FIG. 2B shows an assembly diagram in the basic assembly mode 2 of the present invention. In FIG. 2B, the varistor 2, the alloy type thermal fuse 4, the case 1 and the small case 8 are provided, and the alloy type thermal fuse 4 and the solvent 7 are first manufactured with a ceramic envelope or another high heat conduction and high insulation material. Insert into the inside of the small case 8, seal the mouth of the small case 8 with the epoxy sealant 6,
The inside of the small case 8 is in close contact with one surface of the varistor 2, and then both are arranged inside the case 1 at the same time, and the opening of the case 1 is sealed with an epoxy sealant 6 to form a container.

  When each factor causes the varistor 2 to generate heat, the amount of heat is transmitted directly to the small case 8 through the surface, and the amount of heat is directly transmitted to the alloy-type thermal fuse 4 by the small case 8, and the alloy is heated. It melts and quickly shrinks to both fuse lead wires 5 by the action of the solvent 7, interrupts the electric circuit, and separates the deteriorated varistor 2 from the electric circuit.

Example 3
Examples of two lead wires of the present invention are shown in FIGS. 3A and 3B. In this embodiment, the varistor 2, the alloy-type thermal fuse 4, the case 1 and the small case 8 are provided, and the front wall of the case 1 is extended toward the outside, and one protrusion 11 is used as a small case installation space. The alloy-type thermal fuse 4 and solvent 7 are inserted into a small case 8 made of a ceramic envelope or another material with high thermal conductivity and high insulation, and the mouth of the small case 8 is sealed with an epoxy sealant 6. Then, the inner surface of the small case 8 is in close contact with one surface of the varistor 2, and both are placed inside the case 1 at the same time (see FIG. 2B), and then the first lead wire 3a of the varistor 2 is an alloy type. Connected to the second lead wire 5a of the thermal fuse 4 and sealed inside the case, the second lead wire 3b of the varistor 2 and the second lead wire 5b of the alloy type thermal fuse 4 respectively extend to the outside of the case, and Case 1 with epoxy sealant 6 The opening is sealed to form a container.

Example 4
This is an embodiment of the three lead wire of the present invention. As shown in FIG. 4A and FIG. 4B, the lead wires 3a and 3b of the varistor 2 all extend into the case in a place different from the third embodiment, and one lead wire 3a is an alloy type. It is connected to one lead wire 5a of the thermal fuse 4, the connection point is sealed inside the case, the other lead wire 5b of the alloy type thermal fuse 4 extends to the outside of the case, The opening of the case 1 is sealed with an epoxy sealing material 6 to form a sealed container.

Example 5
This is an embodiment of the four lead wire of the present invention. As shown in FIGS. 5A and 5B, the difference from Example 3 is that both lead wires 3a and 3b of varistor 2 and both lead wires 5a and 5b of alloy type thermal fuse 4 all extend into the case, and each lead wire Are not connected to each other, and the opening of the case 1 is sealed with an epoxy sealant 6 to form a container.

Example 6
This is an embodiment in which both varistors of the present invention are connected in series. 6A and 6B, two varistors 2 and 2 ', alloy type thermal fuse 4, case 1 and small case 8 are provided, case 1 is rectangular, alloy type thermal fuse 4 and solvent 7 is inserted into the inside of the small case 8, the mouth of the small case 8 is sealed with the epoxy sealant 6, and the small case 8 is sandwiched between the two varistors 2 and 2 ′, One surface of the second varistor 2 'is in close contact with the outer wall on the one side, and one surface of the second varistor 2' is in close contact with the outer wall on the other side. One lead wire 5a of the alloy type thermal fuse 4 is connected to one lead wire 3a of the first varistor 2, and the other lead wire 5b of the alloy type thermal fuse 4 is connected to the second varistor 2 '. Connected to one lead wire 3a ′ and sealed inside the case, the first and second varistors 2 and 2 ′ are connected in series. Is, the first varistor and the other one of the lead line 3b of the second varistor, elongation respectively 3b 'is into the case, and the vessel was sealed the opening of the case 1 with an epoxy sealing material 6. In this embodiment, when two varistors can be overlapped and there is a demand for high varistors, a varistor with two low varistors can be used together when it is difficult to realize a single varistor. At the same time, it can have an inoperative protection function.

Example 7
This is an embodiment in which both varistors of the present invention are connected in parallel. As shown in FIGS. 7A and 7B, two varistors 2 and 2 ′, alloy-type thermal fuse 4, case 1 and small case 8 are provided, and the difference from Example 6 is that two varistors 2 and 2 ′, One lead wire 3a and 3a ′ are connected to each other, and one lead wire 5a of the alloy type thermal fuse 4 sandwiched between both varistors, so that the two varistors are connected in parallel. Then, the other two lead wires 3b and 3b 'of the varistor and the other lead wire 5b of the alloy type thermal fuse 4 are extended to the outside of the case, respectively, and the opening of the case 1 is sealed with the epoxy sealant 6 It is a container. In this embodiment, when the voltage of the varistor cannot be changed, it is possible to increase the varistor energization current and to have an inoperable protection function.

  The present invention is made based on the principles of the fifth and sixth embodiments, and by having two or more varistors in series and parallel.

Example 8
This is an embodiment having an alarm function of the present invention. On the basis of the configuration of Examples 2 to 7, an alarm device 9 having a function that operates according to a constant temperature characteristic is installed beside the alloy type thermal fuse, and the normal open or normal close is replaced with the normal close. Two types of formulas to replace the normal open are provided, and the alarm device 9 lights up or blinks the connected lamp to activate the alarm function.

  As shown in FIG. 8, this is a single varistor with a single varistor having an alarm function. In the present embodiment, the varistor 2, the alloy type thermal fuse 4, the case 1 and the small cases 8 and 8 'are provided, and the protrusions 11 and 12 with the front wall and the rear wall of the case 1 extending outward are small. The case 8 and 8 'are arranged in the space, and the alloy type thermal fuse 4 and solvent 7 are first inserted into the ceramic envelope or the inside of the small case 8 made of another material with high thermal conductivity and high insulation. The mouth of 8 is sealed with an epoxy sealant 6, and at the same time, an alarm device 9 having temperature characteristics is inserted into another small case 8 ′, and the varistor 2 is in close contact with one surface of the small case 8 Then, the varistor 2 is brought into close contact with one surface of another small case 8 ′, and then the three cases are installed inside the case 1, and the mouth of the small case 8 is sealed with the epoxy sealant 6.

Example 9
This is an embodiment with the activation of the preliminary varistor of the present invention. As shown in FIG. 9, on the basis of Examples 2 to 7, one switching device 10 is installed on the side of the alloy-type thermal fuse 4 so that a normal open having a constant operating temperature characteristic is converted into a normal close. 10 is connected to another auxiliary varistor (configured as in Examples 1 to 8) in series, then in parallel in the circuit, and the temperature of varistor 2 (in the circuit) is the specified temperature Then, the second varistor is activated to enter a moving state, and thus a multi-stage auxiliary varistor can be realized. Example 8 can be carried out simultaneously with Example 7.

  In the examples from Example 3 to Example 7, when the varistor 2 generates heat due to various factors, the amount of heat is transferred through its surface layer to a small case 8 made of a ceramic envelope or another material with high thermal conductivity and high insulation. It is transmitted to the alloy thermal fuse 4 and the alloy solvent 7 through the lead wire, and the alloy melts after receiving heat, and quickly shrinks to both fuse lead wires 5 by the action of the alloy solvent 7 (FIGS. 1A and 1B). Then, the electric circuit is cut off, and the deteriorated varistor 2 is separated from the electric circuit, and its thermal reaction speed is fast and the structure is simple and close.

  In the examples from Example 1 to Example 7, the varistor 2 was coated with epoxy seal powder on the case where the lead wires 3a and 3b were welded to the silver layers on both sides of the sintered varistor bare piece. After being inserted into the sealed container in the form of a product and bonded to the alloy-type thermal fuse 4, or after welding a single piece of copper on the silver layer on one side of the bare varistor bare piece The lead wire 3b is welded onto the copper piece, and the other silver layer is connected to the thermal fuse 5a as the lead wire 3a, and then inserted into the case, and a gap between the sealing portion in the case and a margin Part is filled with epoxy and sealed.

  The varistor provided with the alloy type thermal fuse of the present invention has a simple and compact structure, is convenient for connection and use, can be produced in large quantities by industrialization, and has excellent industrial practicality.

It is a figure which shows the form before fusing of the thermal fuse of this invention. It is a figure which shows the form after fusing of the thermal fuse of this invention. It is an assembly drawing which shows the form 1 of the basic assembly of this invention. FIG. 3 is an assembly diagram showing a basic assembly mode 2 of the present invention. It is an assembly drawing which shows the Example of the two lead wires of this invention. It is an electric circuit diagram using the Example of two lead wires of this invention. It is an assembly drawing which shows the Example of the three lead wires of this invention. It is an electric circuit diagram using the example of three lead wires of the present invention. It is an assembly drawing which shows the Example of four lead wires of this invention. It is an assembly drawing which shows the Example by which the varistor of this invention was connected in series. It is an electric circuit diagram using the Example which the varistor of this invention became in series. It is an assembly drawing which shows the Example which the varistor of this invention became parallel. It is an electric circuit diagram using the Example with which the varistor of this invention became parallel. It is an assembly drawing which shows the Example with an alarm function of this invention. It is an electric circuit diagram using an embodiment having an alarm function of the present invention. FIG. 6 is an electric circuit diagram using an embodiment in which the preliminary varistor of the present invention can be activated.

Explanation of symbols

1 Case 2 Varistor 3 Varistor lead wire 4 Alloy-type thermal fuse 5 Fuse lead wire 6 Epoxy sealant 7 Solvent 8 Small case 9 Normal open that operates by constant temperature characteristics switches to normal close or normal close to normal open Switched alarm device 10 Switching device in which normally open is converted to normally closed

Claims (14)

A varistor, an alloy-type thermal fuse, and a container are provided, and the varistor and the alloy-type thermal fuse are installed side by side in the container, and their surfaces are in close contact with each other, and the lead wire is drawn out of the container. A varistor with an alloy-type thermal fuse, characterized in that a container is filled with an alloy solvent. The container has one case with an opening, and a varistor and an alloy-type thermal fuse are installed side by side inside the case, filled with an alloy solvent, and an epoxy seal is provided in the upper opening. The varistor with an alloy type thermal fuse according to claim 1, wherein the varistor is configured as follows. 3. The varistor with an alloy-type thermal fuse according to claim 1, wherein the alloy-type thermal fuse is a single low-melting-point alloy yarn, and lead wires are provided at both ends thereof. A varistor, an alloy type thermal fuse, and a container are provided, the alloy type thermal fuse is installed in one small case, the small case and the varistor are installed side by side, and one outer wall of the small case and the varistor A varistor with an alloy-type thermal fuse, characterized in that the lead wire is brought close to one surface, the lead wire is drawn out of the case, and a small case is filled with an alloy solvent. The container is provided with a case with an opening, the case has a protruding part whose front wall extends to the outside, and is used as a small case installation space, and an epoxy sealant is provided in the case opening. The varistor with an alloy type thermal fuse according to claim 4, wherein the varistor is configured as a container. 6. The varistor with an alloy-type thermal fuse according to claim 4, wherein the alloy-type thermal fuse is an alloy yarn having a low melting point and is provided with lead wires at both ends thereof. 5. The small case according to claim 4, wherein the small case is made of a ceramic envelope or the other material having high heat conductivity and high insulation, and at least one side wall is provided on a flat surface. Varistor with alloy type thermal fuse. One lead wire of the alloy type thermal fuse is connected to one lead wire of the varistor and sealed inside the case so that the other lead wire of the varistor and the other lead wire of the alloy type thermal fuse The varistor with an alloy type thermal fuse according to claim 4, wherein the varistor is pulled out to the outside of the case. Pull out the two lead wires of the varistor to the outside of the case, in which one lead wire of the varistor adjacent to the thermal fuse is connected to one lead wire of the alloy type thermal fuse, and this contact is connected to the case 5. The varistor with an alloy type thermal fuse according to claim 4, wherein the varistor is sealed inside, and another lead wire of the alloy type thermal fuse is drawn out of the case. 5. The varistor with an alloy type thermal fuse according to claim 4, wherein the lead wire of the varistor and the lead wire of the alloy type thermal fuse are drawn out of the case but are not connected to each other. The second varistor is also provided, and a small case containing an alloy type thermal fuse is sandwiched and fixed between two varistors, and the outer wall on one side is in close contact with one surface of the first varistor. The outer wall on one side is in close contact with the surface of the second varistor, and is housed inside the container, in which one lead wire of the alloy type thermal fuse is connected to one lead wire of the first varistor. The other lead wire of the alloy-type thermal fuse is connected to one lead wire of the second varistor and accommodated in the container, and the first and second varistors are connected in series. 5. The varistor with an alloy type thermal fuse according to claim 4, wherein the other lead wires of the two varistors are respectively drawn out of the case. Also equipped with a second varistor, a small case containing an alloy-type thermal fuse is sandwiched and fixed between two varistors, and the outer wall on one side of the small case is in close contact with one surface of the first varistor, After the outer wall of the other side is in close contact with one surface of the second varistor and stored inside the container, one lead wire of the first varistor is connected to one lead wire of the second varistor therein, Also connected to one lead wire of the alloy type thermal fuse, two varistors are arranged in parallel, and the other lead wire of the first and second varistors and the other lead wire of the alloy type thermal fuse 5. The varistor with an alloy-type thermal fuse according to claim 4, wherein the varistors are drawn out of the case. The alloy according to claim 4, wherein an alarm device that operates according to a constant temperature characteristic is arranged beside an alloy-type thermal fuse in the case and has two types of normal open or normal close. Varistor with mold temperature fuse. A varistor, an alloy-type thermal fuse, a case, and two small cases, and the front and rear walls of the case all extend outwards, protruding parts appear, and the installation space for the two small cases An alloy type thermal fuse and solvent are housed in one small case, its mouth is sealed with an epoxy sealant, and an alarm device with temperature characteristics is placed in the other small case. 14. The alloy-type thermal fuse according to claim 4 or 13, wherein the inside surfaces of the small cases are in close contact with each other, the three members are installed inside the case, and the opening of the case is sealed with an epoxy seal. The attached varistor.

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