Electric equipment and quick-acting surge protection module with over-temperature protection function thereof

Abstract

The utility model provides electric equipment and a quick-acting surge protection module with an over-temperature protection function thereof, relates to the technical field of temperature fuses, and provides a surge protection module which can give out an early warning signal when a piezoresistor has the risk of deterioration and leakage circuit increase, generates heat through a heating resistor, and is used for protecting the temperature of the electric equipment and the surge protection module with the quick-acting over-temperature protection function. Heat is provided for the temperature fuse in advance for preparation; when the piezoresistor is deteriorated and the leakage current is increased to generate heat, the abnormal temperature of the piezoresistor can be quickly sensed to quickly act, so that accurate and timely overheating protection is realized, the risks of smoking and catching fire of the piezoresistor are prevented, and the safety of electric equipment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature fuses, in particular to electrical equipment and a fast-acting surge protection module with an over-temperature protection function. Background Art

[0002] The lightning protection devices currently on the market usually use varistors as surge absorption components, and a temperature fuse is connected in series with the varistor as a varistor protection component. When the varistor is abnormal or has been working for a period of time, the varistor will heat up due to increased leakage current, or even catch fire and burn; at this time, the temperature fuse needs to disconnect the circuit in time and remove the varistor from the circuit. However, it often takes a certain amount of time for the heat generated by the varistor to be transferred to the temperature fuse and reach the designed operating temperature of the temperature fuse. Sometimes the heat generated by the varistor is enough to make the varistor smoke or even catch fire, but the temperature fuse still does not feel enough heat and disconnects the circuit.

[0003] The existing varistor lightning arrester scheme with alloy-type temperature fuse is specifically that the varistor and the alloy-type temperature fuse are arranged in a sealed shell, the surfaces of the varistor and the alloy-type temperature fuse are close to each other, one pin of the temperature fuse extends to the outside of the shell; the other pin of the temperature fuse is electrically connected to the varistor body; the other pin of the varistor extends to the outside of the shell; and then the varistor and the temperature fuse are sealed in the shell with sealing materials such as epoxy resin. When the varistor is abnormal or the varistor has been working for a period of time, the varistor will heat up due to increased leakage current and even catch fire; at this time, the temperature fuse needs to disconnect the circuit in time and peel the varistor from the circuit. However, it often takes a certain amount of time for the heat generated by the varistor to be transferred to the temperature fuse and reach the designed operating temperature of the temperature fuse. Sometimes the heat generated by the varistor is enough to make the varistor smoke or even catch fire, and the temperature fuse still does not feel enough heat and disconnects the circuit. The temperature fuse has a certain hysteresis in sensing the abnormal temperature of the varistor, and there is a risk of untimely protection. In this case, there is an urgent need for a solution that can help the temperature fuse to act quickly and improve the protection capability of the varistor, so as to improve the safety and reliability of the lightning protector.

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

[0005] The utility model provides an electrical device and a fast-acting surge protection module with an over-temperature protection function, which can at least partially improve the above-mentioned problem.

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

[0007] A fast-acting surge protection module with over-temperature protection function comprises: a housing, and a varistor component, a temperature fuse component and a heating resistor component arranged inside the housing;

[0008] The varistor component is connected to the temperature fuse component, the temperature fuse component is connected to the heating resistor component, the varistor component, the temperature fuse component and the heating resistor component are in contact with each other, the first end of the varistor component serves as a first external pin, the second end of the varistor component or the second end of the heating resistor component serves as a second external pin, and the first external pin and the second external pin are used to connect to an electrical device;

[0009] When an abnormal leakage current occurs in the varistor component, both the varistor component and the heating resistor component generate heat, and the heat of both is transferred to the temperature fuse component to speed up the speed at which the temperature fuse component disconnects the circuit.

[0010] Preferably, the varistor assembly includes a first varistor pin, a varistor chip, and a second varistor pin, wherein the varistor chip is electrically connected to the first varistor pin, the first varistor pin extends to the outside of the housing as a first external pin, the varistor chip is electrically connected to the second varistor pin, and the second varistor pin is connected to the temperature fuse assembly by welding.

[0011] Preferably, the temperature fuse assembly comprises a temperature fuse housing, a first pin of the temperature fuse, and a second pin of the temperature fuse, wherein the temperature fuse housing is electrically connected to the first pin of the temperature fuse and the second pin of the temperature fuse, the second pin of the varistor is connected to the second pin of the temperature fuse by welding, and the second pin of the temperature fuse is connected to the heating resistor assembly by welding.

[0012] Preferably, the heating resistor assembly includes a heating resistor body, a heating resistor first pin, and a heating resistor second pin, wherein the heating resistor body is electrically connected to the first heating resistor pin and the second heating resistor pin, the second pin of the temperature fuse is connected to the first heating resistor pin by welding, and the second heating resistor pin extends to the outside of the housing to serve as a second external pin.

[0013] Preferably, the varistor assembly includes a first varistor and a second varistor, the first varistor is connected in series with the temperature fuse assembly, the heating resistor assembly, and the second varistor, the pin of the first varistor extends to the outside of the housing as a first external pin, and the pin of the second varistor extends to the outside of the housing as a second external pin.

[0014] The utility model also discloses an electrical device, including a device body, a controller configured in the device body, and a fast-acting surge protection module with over-temperature protection function as described in any one of the above items, wherein the fast-acting surge protection module with over-temperature protection function is configured on the device body.

[0015] Preferably, an indicator light module is further included, wherein the output end of the controller is electrically connected to the input end of the indicator light module.

[0016] Preferably, the output end of the controller is electrically connected to the input end of the sound warning module.

[0017] In summary, in order to solve the technical problems of existing varistor lightning arresters, the fast-acting surge protection module with over-temperature protection function provides a "warning signal" when the varistor is at risk of degradation and increased leakage current, generates heat through a heating resistor, and provides heat to the temperature fuse in advance to prepare; when the varistor degrades, the leakage current increases and generates heat, it can quickly sense the abnormal temperature of the varistor and act quickly, thereby achieving accurate and timely overheating protection, preventing the risk of the varistor smoking and catching fire, and protecting the safety of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an external structural diagram of a fast-acting surge protection module with over-temperature protection function provided by an embodiment of the utility model;

[0019] Figure 2 This is an internal structure diagram of a fast-acting surge protection module with over-temperature protection function provided by the first embodiment of the utility model;

[0020] Figure 3 It is an internal structure diagram of a fast-acting surge protection module with over-temperature protection function provided by the second embodiment of the utility model. DETAILED DESCRIPTION

[0021] 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.

[0022] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1 to Figure 2 The first embodiment of the utility model discloses a fast-acting surge protection module with over-temperature protection function, comprising: a housing 0, and a varistor component, a temperature fuse component and a heating resistor component arranged inside the housing 0;

[0024] The varistor component is connected to the temperature fuse component, the temperature fuse component is connected to the heating resistor component, the varistor component, the temperature fuse component and the heating resistor component are in contact with each other, the first end of the varistor component serves as a first external pin, the second end of the varistor component or the second end of the heating resistor component serves as a second external pin, and the first external pin and the second external pin are used to connect to an electrical device;

[0025] When an abnormal leakage current occurs in the varistor component, both the varistor component and the heating resistor component generate heat, and the heat of both is transferred to the temperature fuse component to speed up the speed at which the temperature fuse component disconnects the circuit.

[0026] Preferably, the varistor assembly includes a varistor first pin 1, a varistor chip 3, and a varistor second pin 2, wherein the varistor chip 3 is electrically connected to the varistor first pin 1, the varistor first pin extends 1 to the outside of the housing 0 as a first external pin, the varistor chip 3 is electrically connected to the varistor second pin 2, and the varistor second pin 2 is connected to the temperature fuse assembly by welding.

[0027] Preferably, the temperature fuse assembly includes a temperature fuse housing 6, a temperature fuse first pin 4, and a temperature fuse second pin 5, wherein the temperature fuse housing 6 is electrically connected to the temperature fuse first pin 4 and the temperature fuse second pin 5, the varistor second pin 2 is connected to the temperature fuse second pin 5 by welding, and the temperature fuse second pin 5 is connected to the heating resistor assembly by welding.

[0028] Preferably, the heating resistor assembly includes a heating resistor body 7, a heating resistor first pin 8, and a heating resistor second pin 9, wherein the heating resistor body 7 is electrically connected to the heating resistor first pin 8 and the heating resistor second pin 9, the temperature fuse second pin 5 is connected to the heating resistor first pin 8 by welding, and the heating resistor second pin 9 extends to the outside of the housing 0 as a second external pin.

[0029] In this embodiment, the first pin 1 of the varistor electrically connected to the varistor chip 3 extends to the outside of the housing 0, serving as a pin of a fast-acting surge protection module with an over-temperature protection function; the second pin 2 of the varistor connected to the varistor chip 3 is electrically connected to the first pin 4 of the temperature fuse through various welding methods such as soldering and resistance welding, the second pin 5 of the temperature fuse is electrically connected to the first pin 8 of the heating resistor through soldering, resistance welding, etc., and the second pin 9 of the heating resistor extends to the outside of the housing 0 of a fast-acting surge protection module with an over-temperature protection function, serving as the second pin of a fast-acting surge protection module with an over-temperature protection function. The second pin 5 of the temperature fuse and the first pin 8 of the heating resistor are electrically connected together; at the same time, the housing 6 of the temperature fuse is close to the housing of the heating resistor body 7. When an abnormal current flows through the heating resistor, the heating resistor will heat up rapidly and transfer the heat to the temperature fuse. The temperature fuse will act quickly to disconnect the circuit before the varistor is broken down and catches fire, thereby ensuring the safety of a fast-acting surge protection module with over-temperature protection function and preventing the risk of fire.

[0030] Among them, Figure 2As shown, the heating resistor body 7 is close to the temperature fuse housing 6. When an abnormal current flows through the heating resistor, the heating resistor will heat up quickly and transfer the heat to the temperature fuse. The temperature fuse will act quickly and disconnect the circuit before the varistor is broken down and catches fire, thereby ensuring the safety of a surge protection module with over-temperature protection function that acts quickly and prevents the risk of fire. The first pin 4 of the temperature fuse is electrically connected to the second pin 2 of the varistor. The length of the two pins is very short. When the varistor is abnormal, the abnormal heating of the varistor can quickly transfer the abnormal heat to the temperature fuse through the second pin 2 of the varistor and the temperature fuse housing 6, ensuring that the temperature fuse acts quickly and accurately to protect the varistor. The temperature fuse, the varistor, and the heating wire are close together. When the varistor has an abnormal leakage current, the varistor and the heating resistor will both heat up, and the heat of the two can be transferred to the temperature fuse at the same time, thereby ensuring that the temperature fuse senses the abnormal heat faster, thereby acting more quickly and having a better protection effect.

[0031] Please refer to Figure and Figure 3 The second embodiment of the utility model discloses that the varistor assembly includes a first varistor 10 and a second varistor 11. The first varistor 10 is connected in series with the temperature fuse assembly, the heating resistor assembly, and the second varistor 11. The pin of the first varistor 10 extends to the outside of the shell as a first external pin, and the pin of the second varistor 11 extends to the outside of the shell as a second external pin.

[0032] In this embodiment, when the varistors need to be used in parallel or in series, this solution has obvious advantages, which can effectively save the number of temperature fuses and heating resistors and save the solution cost. Figure 3 As shown in the figure, in order to increase the working voltage and control voltage of the varistor, two varistors with the same current carrying capacity are often used in series. At this time, a temperature fuse and a heating resistor can be installed in series between the two varistors, which can provide fast and sensitive overheat protection for the two varistors at the same time.

[0033] In summary, a temperature fuse is usually installed on the existing varistor. When the varistor is abnormal, the varistor heats up and transfers the heat to the temperature fuse; but sometimes the heat of the varistor is not enough for the temperature fuse to act quickly, resulting in the temperature fuse still not acting after the varistor burns out, or even causing the varistor to burn out and catch fire. In order to make the temperature fuse act more reliably and quickly, or even act in advance, the fast-acting surge protection module with over-temperature protection function adds a heating resistor to the varistor to monitor the abnormal leakage current of the varistor. When there is an abnormal leakage current, the heating resistor starts to heat up and provides enough heat before the varistor burns out, so that the temperature fuse can monitor the abnormality in advance and act to protect the electrical equipment.

[0034] The utility model also discloses an electrical device, including a device body, a controller configured in the device body, and a fast-acting surge protection module with over-temperature protection function as described in any one of the above items, wherein the fast-acting surge protection module with over-temperature protection function is configured on the device body.

[0035] Preferably, an indicator light module is further included, wherein the output end of the controller is electrically connected to the input end of the indicator light module.

[0036] Preferably, the output end of the controller is electrically connected to the input end of the sound warning module.

[0037] 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 fast-acting surge protection module with over-temperature protection function, characterized in that: include: A housing, and a varistor component, a temperature fuse component and a heating resistor component arranged inside the housing; The varistor component is connected to the temperature fuse component, the temperature fuse component is connected to the heating resistor component, the varistor component, the temperature fuse component and the heating resistor component are in contact with each other, the first end of the varistor component serves as a first external pin, the second end of the varistor component or the second end of the heating resistor component serves as a second external pin, and the first external pin and the second external pin are used to connect to an electrical device; When an abnormal leakage current occurs in the varistor component, both the varistor component and the heating resistor component generate heat, and the heat of both is transferred to the temperature fuse component to speed up the speed at which the temperature fuse component disconnects the circuit.

2. The fast-acting surge protection module with over-temperature protection function according to claim 1, characterized in that: The varistor component includes a first varistor pin, a varistor chip, and a second varistor pin, wherein the varistor chip is electrically connected to the first varistor pin, the first varistor pin extends to the outside of the housing as a first external pin, the varistor chip is electrically connected to the second varistor pin, and the second varistor pin is connected to the temperature fuse component by welding.

3. The fast-acting surge protection module with over-temperature protection function according to claim 2, characterized in that: The temperature fuse assembly includes a temperature fuse housing, a first pin of the temperature fuse, and a second pin of the temperature fuse, wherein the temperature fuse housing is electrically connected to the first pin of the temperature fuse and the second pin of the temperature fuse, the second pin of the varistor is connected to the second pin of the temperature fuse by welding, and the second pin of the temperature fuse is connected to the heating resistor assembly by welding.

4. The fast-acting surge protection module with over-temperature protection function according to claim 3, characterized in that: The heating resistor assembly includes a heating resistor body, a first heating resistor pin, and a second heating resistor pin, wherein the heating resistor body is electrically connected to the first heating resistor pin and the second heating resistor pin, the second pin of the temperature fuse is connected to the first heating resistor pin by welding, and the second heating resistor pin extends to the outside of the housing to serve as a second external pin.

5. The fast-acting surge protection module with over-temperature protection function according to claim 1, characterized in that: The varistor assembly includes a first varistor and a second varistor. The first varistor is connected in series with the temperature fuse assembly, the heating resistor assembly, and the second varistor. The pin of the first varistor extends to the outside of the housing as a first external pin, and the pin of the second varistor extends to the outside of the housing as a second external pin.

6. An electrical device, characterized in that: It includes a device body, a controller configured in the device body, and a fast-acting surge protection module with over-temperature protection function as described in any one of claims 1 to 5, wherein the fast-acting surge protection module with over-temperature protection function is configured on the device body.

7. The electrical equipment according to claim 6, characterized in that: An indicator light module is also included, wherein the output end of the controller is electrically connected to the input end of the indicator light module.

8. The electrical equipment according to claim 6, characterized in that: It also includes a sound warning module, wherein the output end of the controller is electrically connected to the input end of the sound warning module.

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