Temperature response type anti-surge protection device and adapter system

Abstract

The utility model relates to a temperature response type anti-surge protection device and an adapter system. At least one low-loss anti-surge circuit is a second-class anti-surge circuit; the second-class anti-surge circuit comprises a second NTC resistor and a temperature induction type normally-closed switch which are connected to the live wire in series and form a first branch circuit, and the second-class anti-surge circuit further comprises at least one second temperature induction type normally-open switch connected with the first branch circuit in parallel; the off temperature point of the temperature induction type normally-closed switch is higher than the on temperature point of the second temperature induction type normally-open switch. The beneficial effects of the utility model lie in that compared with the prior art, the off temperature point of the temperature induction type normally-closed switch is set to be higher than the on temperature point of the second temperature induction type normally-open switch, so that the circuit can be effectively protected under different temperature conditions, and under normal working conditions, the energy loss is reduced through the bypass NTC resistor, and the service life of the circuit is prolonged. And the system efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power anti surge technical field, concretely relates to a temperature response formula's anti surge protection device and adapter system. BACKGROUND

[0002] The current market adapter in access commercial power, generally uses NTC (negative temperature coefficient thermistor) to carry out temperature control, but this kind of mode can cause greater energy loss, because NTC can produce I^2*R (current square times resistance) loss when working.

[0003] Some equipment attempts to reduce the loss of NTC by parallel connection of a temperature switch, but this method has the problem of uneven current flow, that is, the current cannot be evenly distributed between NTC and temperature switch, affecting the efficiency and stability of the system.

[0004] In addition, in some device designs, the closure of the temperature switch depends on the heat generated by the NTC. However, there is a cycle problem: once the temperature switch is closed, the temperature of the NTC will drop, causing the temperature switch to open again, and so on, causing the system to be unstable.

[0005] The above problems affect the efficiency and reliability of the adapter system. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide a temperature response type anti surge protection device and adapter system to solve the problem of low reliability of the adapter system.

[0007] The technical solution adopted by the utility model to solve its technical problem is to provide a temperature response type anti surge protection device, which is connected to an external power supply, so the anti surge protection device is provided with a plurality of socket modules, each of which is provided with a low-loss anti surge circuit, and each low-loss anti surge circuit is connected to three input terminals of the external power supply.

[0008] At least one low-loss anti surge circuit is a second type of anti surge circuit.

[0009] The second type of anti surge circuit includes a second NTC resistor connected in series to the live wire and a temperature sensing normally closed switch, and constitutes a first branch, and the second type of anti surge circuit further includes at least one second temperature sensing normally open switch connected in parallel to the first branch.

[0010] The opening temperature point of the temperature sensing normally closed switch is higher than the closing temperature point of the second temperature sensing normally open switch.

[0011] Preferably, the at least one low-loss surge protection circuit is a first type of surge protection circuit, which comprises a first NTC resistor connected in series to a hot line and a first temperature-sensitive normally open switch connected in parallel to the first NTC resistor; and the opening temperature point of the temperature-sensitive normally closed switch is higher than the closing temperature point of the first temperature-sensitive normally open switch.

[0012] Preferably, the hot line of the first input terminal of the external power supply is connected to the first functional circuit through a first low-loss surge protection circuit as a second type of surge protection circuit, and the temperature-sensitive normally closed switch and the second temperature-sensitive normally open switch of the first low-loss surge protection circuit are arranged close to the heat source components of the first functional circuit, or the temperature-sensitive normally closed switch and the second temperature-sensitive normally open switch of the first low-loss surge protection circuit are connected to the heat source components of the first functional circuit through a first heat conduction member.

[0013] The hot line of the third input terminal of the external power supply is connected to the third functional circuit through a third low-loss surge protection circuit as a second type of surge protection circuit, and the temperature-sensitive normally closed switch and the second temperature-sensitive normally open switch of the third low-loss surge protection circuit are arranged close to the heat source components of the third functional circuit, or the temperature-sensitive normally closed switch and the second temperature-sensitive normally open switch of the third low-loss surge protection circuit are connected to the heat source components of the third functional circuit through a third heat conduction member.

[0014] Preferably, the first functional circuit and the third functional circuit are both bridge rectifier circuits; a fuse, an overvoltage protection component and a common mode inductor are arranged between the first input terminal and the first low-loss surge protection circuit; and a fuse, an overvoltage protection component and a common mode inductor are also arranged between the third input terminal and the third low-loss surge protection circuit.

[0015] Preferably, the first type of surge protection circuit comprises two first temperature-sensitive normally open switches.

[0016] Preferably, the hot line of the first input terminal of the external power supply is connected to the fourth functional circuit through a fourth low-loss surge protection circuit as a first type of surge protection circuit, and the temperature-sensitive normally closed switch of the fourth low-loss surge protection circuit is arranged close to the heat source components of the fourth functional circuit, or the temperature-sensitive normally closed switch of the fourth low-loss surge protection circuit is connected to the heat source components of the fourth functional circuit through a fourth heat conduction member.

[0017] The firewire of the second input end of the external power supply is connected with the second functional circuit through the second low-loss surge protection circuit as the first type of surge protection circuit, and the temperature sensing normally closed switch of the second low-loss surge protection circuit is arranged close to the heat source component of the second functional circuit, or the temperature sensing normally closed switch of the second low-loss surge protection circuit is arranged through the second heat conduction member and the heat source component of the second functional circuit.

[0018] Preferably, the second functional circuit is a bridge rectifier circuit, and the fourth functional circuit is a MOS tube switch control type bridge rectifier circuit; a fuse, an overvoltage protection element and a common mode inductor are arranged between the first input end and the fourth low-loss surge protection circuit; and a fuse, an overvoltage protection element and a common mode inductor are also arranged between the second input end and the second low-loss surge protection circuit.

[0019] Preferably, the recovery temperature point of the temperature sensing normally closed switch to the initial state is higher than the recovery temperature point of the first temperature sensing normally open switch to the initial state.

[0020] Preferably, the recovery temperature point of the temperature sensing normally closed switch to the initial state is higher than the recovery temperature point of the second temperature sensing normally open switch to the initial state.

[0021] The technical scheme adopted by the utility model to solve its technical problems is to provide an adapter system, which comprises:

[0022] An external power supply;

[0023] A surge protection device, the surge protection device is connected with the external power supply, so the surge protection device is provided with a plurality of socket modules, each socket module is provided with a low-loss surge protection circuit;

[0024] A plurality of functional circuits, and each low-loss surge protection circuit is connected with a corresponding functional circuit.

[0025] Compared with the prior art, the utility model has the beneficial effects that the disconnection temperature point of the temperature sensing normally closed switch is set to be higher than the closing temperature point of the second temperature sensing normally open switch, the circuit can be effectively protected under different temperature conditions, the energy loss is reduced through the bypass NTC resistance under normal working conditions, and the efficiency of the system is improved; when the temperature abnormally rises, additional protection is provided through the disconnection of the circuit, and the safety of the system is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be described further below in combination with the drawings and embodiments, and the drawings show:

[0027] Figure 1It is the circuit principle schematic view of the anti-surge protection device based on the first low-loss anti-surge circuit of the utility model.

[0028] Figure 2 It is the circuit principle schematic view of the anti-surge protection device based on the third low-loss anti-surge circuit of the utility model.

[0029] Figure 3 It is the circuit principle schematic view of the anti-surge protection device based on the fourth low-loss anti-surge circuit of the utility model.

[0030] Figure 4 It is the circuit principle schematic view of the anti-surge protection device based on the second low-loss anti-surge circuit of the utility model. DETAILED DESCRIPTION

[0031] The preferred embodiments of the temperature response type anti-surge protection device are described in detail below with reference to the accompanying drawings.

[0032] As shown in the drawings, Figures 1 to 4 The utility model provides temperature response type anti-surge protection device's preferred embodiment.

[0033] A temperature response type anti-surge protection device, the anti-surge protection device is connected with external power supply, so anti-surge protection device is provided with a plurality of socket module, each socket module is provided with low-loss anti-surge circuit, and each low-loss anti-surge circuit is connected with three input terminals of external power supply respectively;At least one low-loss anti-surge circuit is the second type anti-surge circuit;The second type anti-surge circuit includes the second NTC resistance NTC2 in series to the fire line and temperature sensing type normally closed switch KT3, and constitutes the first branch, and the second type anti-surge circuit also includes at least one second temperature sensing type normally open switch KT2 in parallel with the first branch;The opening temperature point of temperature sensing type normally closed switch KT3 is higher than the closing temperature point of second temperature sensing type normally open switch KT2.

[0034] The anti-surge protection device is used to be connected with external power supply, and the electric energy inputted by external power supply is protected against surge, and the circuit components in the equipment are protected against damage, and each low-loss anti-surge circuit is connected with one input terminal of external power supply respectively, so that each power input can be effectively protected.

[0035] Wherein, NTC (Negative Temperature Coefficient) refers to negative temperature coefficient thermistor, and the resistance value decreases with the increase of temperature, and the NTC thermistor can provide accurate resistance change according to temperature change.

[0036] In the embodiment, the at least one low-loss surge protection circuit is a second type of surge protection circuit. The second NTC resistor NTC2 provides a high resistance value in the initial stage to suppress transient large current, and in normal working conditions, the temperature-sensitive normally closed switch KT3 remains closed to allow current to pass through the second NTC resistor NTC2; when the temperature exceeds the opening temperature point, the temperature-sensitive normally closed switch KT3 is opened, increasing the resistance value of the circuit and thus providing additional protection. Moreover, through the parallel connection of at least one second temperature-sensitive normally open switch KT2, when the temperature in the circuit reaches the closing temperature point of the second temperature-sensitive normally open switch KT2, the second temperature-sensitive normally open switch KT2 is closed, bypassing the first branch in which the second NTC resistor NTC2 is located, thereby reducing the total resistance value and energy loss of the circuit, such as reducing the loss (I2^2*R2), I2 being the current passing through the second NTC resistor NTC2, and R21 being the resistance value of the second NTC resistor NTC2.

[0037] In the embodiment, the opening temperature point of the temperature-sensitive normally closed switch KT3 is set to be higher than the closing temperature point of the second temperature-sensitive normally open switch KT2, which can effectively protect the circuit under different temperature conditions. Moreover, under normal working conditions, the bypass NTC resistor reduces energy loss and improves the efficiency of the system; when the temperature abnormally rises, the circuit is opened to provide additional protection and enhance the safety of the system.

[0038] Of course, multiple second temperature-sensitive normally open switches KT2 can also be provided to achieve the parallel connection of multiple second temperature-sensitive normally open switches KT2 to the first branch.

[0039] In the embodiment, reference is made to Figure 3 and Figure 4 , the at least one low-loss surge protection circuit is a first type of surge protection circuit, which includes a first NTC resistor NTC1 connected in series to the live wire, and a first temperature-sensitive normally open switch KT1 connected in parallel to the first NTC resistor NTC1; the opening temperature point of the temperature-sensitive normally closed switch KT3 is higher than the closing temperature point of the first temperature-sensitive normally open switch KT1. The first NTC resistor NTC1 provides a high resistance value in the initial stage to suppress transient large current, and moreover, through the parallel connection of at least one first temperature-sensitive normally open switch KT1, when the temperature in the circuit reaches the closing temperature point of the first temperature-sensitive normally open switch KT1, the first temperature-sensitive normally open switch KT1 is closed, bypassing the first NTC resistor NTC1, thereby reducing the total resistance value and energy loss of the circuit, such as reducing the loss (I1^2*R1), I1 being the current passing through the first NTC resistor NTC1, and R1 being the resistance value of the first NTC resistor NTC1.

[0040] In this embodiment, the first type of surge protection circuit and the second type of surge protection circuit are set simultaneously, that is, one input end is connected to the first type of surge protection circuit, and the other input end is connected to the second type of surge protection circuit, to achieve multi-level protection. The first type of surge protection circuit is mainly used for discharging lightning current to protect the high-voltage part of the entire power system, and the second type of surge protection circuit is used to further reduce the surge voltage to protect low-voltage equipment from damage caused by the surge voltage, thereby improving the overall protection effect.

[0041] In addition, the first type of surge protection circuit can withstand larger surge voltage and energy, and is suitable as the first line of defense, and the second type of surge protection circuit is suitable as supplementary protection to protect the residual surge after being weakened by the first type of surge protection circuit and the medium energy surge caused by internal switch operation; by setting different types of surge protection circuits at different input ends, it is ensured that each input power supply can be protected according to its characteristics, thereby improving the reliability and stability of the entire system.

[0042] In this embodiment, the recovery temperature point of the temperature-sensitive normally closed switch KT3 to return to the initial state is higher than the recovery temperature point of the first temperature-sensitive normally open switch KT1 to return to the initial state; and the recovery temperature point of the temperature-sensitive normally closed switch KT3 to return to the initial state is higher than the recovery temperature point of the second temperature-sensitive normally open switch KT2 to return to the initial state.

[0043] A double protection mechanism is provided, the temperature-sensitive normally closed switch KT3 is disconnected when the temperature rises to a certain threshold, cutting off the circuit to prevent overheating damage. Among the first temperature-sensitive normally open switch KT1 and the second temperature-sensitive normally open switch KT2, they are closed when the temperature rises to another threshold, used to start the cooling system or other protection measures. By setting different recovery temperature points, protection can be provided at different temperature stages to ensure that the circuit remains disconnected before the temperature drops to a safe level, avoiding the potential risk of premature recovery. In addition, the recovery temperature point of the temperature-sensitive normally closed switch KT3 is set higher, so that even if the normally open switch has recovered, the circuit will not be reconnected until the temperature drops to a safer level, ensuring that the device or circuit will not restart due to a slight drop in temperature, thereby avoiding possible damage. If the recovery point of the normally closed switch is lower, the switch will be frequently opened and closed during temperature fluctuations, which will shorten the service life of the switch and may cause instability of the circuit or device. By setting a higher recovery point, the frequency of switching action can be reduced.

[0044] Finally, if the recovery temperature point of the temperature-sensitive normally closed switch KT3 is low, the circuit may be reconnected when the temperature drops slightly, and setting a higher recovery temperature point can prevent this from happening, ensuring that the device restarts at a safe temperature.

[0045] In the initial state, the temperature sensing type normally closed switch KT3 is closed, i.e., when the temperature does not reach a certain temperature threshold, the switch is closed; in the working process, when the temperature exceeds the disconnection temperature point, the switch is disconnected; in the recovery process, when the temperature drops below the recovery temperature point, the switch returns to the initial closed state.

[0046] In the embodiment, an adapter system is provided, which comprises an external power supply, the surge protection device described above, and the surge protection device is connected with the external power supply, so that the surge protection device is provided with a plurality of socket modules, each of which is provided with a low-loss surge protection circuit; a plurality of function circuits are connected with the corresponding low-loss surge protection circuits respectively.

[0047] The surge protection device comprises at least three low-loss surge protection circuits, which can ensure that each power input end is effectively protected.

[0048] The customized protection for different function circuits can ensure that each input power can be protected according to its characteristics, thereby improving the safety and reliability of the whole system. The optimization design of the circuit is realized, and the reasonable selection and configuration of the elements in the surge protection circuit are crucial to the optimization design of the circuit. For example, the selection of the pressure sensitive resistor is the most important parameter: the maximum allowable voltage, the maximum clamping voltage and the surge current that can be withstood.

[0049] As shown in Figures 1 to 4 The utility model provides a low-loss surge protection circuit optimal embodiment.

[0050] The firewire L1 of the first input end 110 of the external power supply is connected with the first function circuit 130 through the first low-loss surge protection circuit 120 as the second type surge protection circuit, and the temperature sensing type normally closed switch KT3 and the second temperature sensing type normally open switch KT2 of the first low-loss surge protection circuit 120 are arranged close to the heat source component of the first function circuit 130, or the temperature sensing type normally closed switch KT3 and the second temperature sensing type normally open switch KT2 of the first low-loss surge protection circuit 120 are connected and arranged with the heat source component of the first function circuit 130 through the first heat conduction piece.

[0051] The firewire L3 of the third input end 310 of the external power supply is connected with the third functional circuit 330 through the third low-loss surge protection circuit 320 as the second type of surge protection circuit, and the temperature sensing normally closed switch KT3 and the second temperature sensing normally open switch KT2 of the third low-loss surge protection circuit 320 are arranged close to the heat source components of the third functional circuit 330, or the temperature sensing normally closed switch KT3 and the second temperature sensing normally open switch KT2 of the third low-loss surge protection circuit 320 are arranged in connection with the heat source components of the third functional circuit 330 through the third heat conduction member.

[0052] In the embodiment, the temperature sensing normally closed switch KT3 and the second temperature sensing normally open switch KT2 are arranged close to the heat source components, more accurately sensing and responding to the actual temperature change of the functional circuit, providing more timely protection, and rapidly responding when the temperature abnormally rises, quickly opening or closing the circuit to protect the circuit from overheating damage, reducing the false operation caused by the temperature change of the non-heat source components due to the change of the environmental temperature, and improving the stability of the system.

[0053] Specifically, the arrangement close to the heat source components, the temperature sensing normally closed switch KT3 and the second temperature sensing normally open switch KT2 in the second type of surge protection circuit should be arranged as close as possible to the heat source components of the first functional circuit 130 or the third functional circuit 330, ensuring that the temperature sensing switch can quickly and accurately respond to the temperature change of the heat source components, thereby providing timely protection, and can be attached to the heat source components or arranged close enough to the heat source components.

[0054] In addition, the arrangement of the heat conduction member, such as the temperature sensing normally closed switch KT3 and the second temperature sensing normally open switch KT2, cannot be directly arranged close to the heat source components, and can be arranged in connection with the heat source components through the first heat conduction member or the third heat conduction member. The first heat conduction member and the third heat conduction member can be metal sheets or other high-thermal-conductivity materials, which can conduct heat from the heat source components to the temperature sensing switch, ensuring that the temperature sensing switch can accurately sense the temperature change.

[0055] In the embodiment, the second NTC resistor NTC2 is also arranged close to the heat source components, improving the accuracy of temperature sensing. By installing the NTC thermistor close to the heat source, the temperature of the heat source can be accurately detected, the most accurate temperature feedback is provided, and the circuit can be more accurately controlled and protected. Under normal working conditions, the resistance value of the second NTC resistor NTC2 will decrease, thereby reducing energy loss. By arranging the NTC resistor close to the heat source, the energy loss caused by the NTC resistor can be reduced without affecting the protection of the circuit.

[0056] In the embodiment, the first functional circuit 130 and the third functional circuit 330 are both bridge rectifier circuits (131, 331); the first input end 110 and the first low-loss surge protection circuit 120 are provided with a fuse 141, an overvoltage protection element 142 and a common-mode inductor 143; and the third input end 310 and the third low-loss surge protection circuit 320 are also provided with a fuse 341, an overvoltage protection element 342 and a common-mode inductor 343.

[0057] Specifically, the bridge rectifier circuit is a circuit that converts alternating current (AC) to direct current (DC), composed of four diodes connected in a "bridge" configuration. Specifically, the four diodes are arranged in a rectangular or square configuration. The working principle of the bridge rectifier circuit is based on the unidirectional conductivity of diodes, that is, diodes only allow current to flow in one direction. Since diodes generate power consumption when conducting, this part of the power consumption will be converted into heat, especially when the current is large, the diode may become the main heat source.

[0058] Regarding the fuse, the fuse is usually connected in series in the circuit to protect the circuit from overcurrent damage. The fuse is connected in series on the live wire, and the current must flow through the fuse to reach the load. The working principle of the fuse is that when the current passing through it exceeds its rated value, the fuse inside the fuse will melt due to overheating, thereby cutting off the circuit and protecting the circuit from damage.

[0059] Regarding the overvoltage protection element circuit, the overvoltage protection element (such as MOV, metal oxide varistor) is connected in parallel between the live wire and the neutral wire. Its function is to conduct and release overvoltage when the voltage exceeds the predetermined safety threshold, directing excess voltage to ground, thereby protecting the circuit from high voltage damage. Under normal working voltage, the MOV presents a high resistance state and consumes almost no power. When overvoltage occurs, the MOV quickly becomes a low resistance state, absorbing overvoltage energy and protecting the circuit.

[0060] Regarding the common-mode inductor circuit, the common-mode inductor is respectively provided on the live wire and the neutral wire, used to suppress common-mode noise, that is, noise flowing between the two power supply lines. The common-mode inductor is usually composed of two identical inductor coils wound on a magnetic core but wound in opposite directions. In the normal working state, the common-mode inductor has a small impedance to differential-mode signals (i.e. normal working current between the live wire and the neutral wire), and a large impedance to common-mode signals (i.e. noise between the live wire and the neutral wire to ground), thereby effectively suppressing common-mode noise.

[0061] Through the combination of the above-mentioned protection elements, comprehensive protection is provided to prevent circuit damage caused by overcurrent, overvoltage and electromagnetic interference. The fuse provides overcurrent protection, the overvoltage protection element provides voltage spike protection, and the common mode inductor provides electromagnetic compatibility protection, which together ensures the stability and safety of the power supply system.

[0062] In the present embodiment, the firewire L1 of the first input end 110 of the external power supply is connected with the fourth low-loss surge protection circuit 420 as the first type of surge protection circuit, and the temperature-sensitive normally closed switch KT3 of the fourth low-loss surge protection circuit 420 is arranged close to the heat source component of the fourth functional circuit 430, or the temperature-sensitive normally closed switch KT3 of the fourth low-loss surge protection circuit 420 is arranged in connection with the heat source component of the fourth functional circuit 430 through the fourth heat conduction member; the firewire L2 of the second input end 210 of the external power supply is connected with the second low-loss surge protection circuit 220 as the first type of surge protection circuit, and the temperature-sensitive normally closed switch KT3 of the second low-loss surge protection circuit 220 is arranged close to the heat source component of the second functional circuit 230, or the temperature-sensitive normally closed switch KT3 of the second low-loss surge protection circuit 220 is arranged in connection with the heat source component of the second functional circuit 230 through the second heat conduction member.

[0063] The specific description is similar to the above-mentioned second type of surge protection circuit, mainly close to the heat source or connected with the heat source through the heat conduction member, which will not be described again.

[0064] Regarding the connection of the first input end 110 with the fourth low-loss surge protection circuit 420 and the first low-loss surge protection circuit 120 respectively, the purpose is to provide multi-level protection, and the fourth low-loss surge protection circuit 420 and the first low-loss surge protection circuit 120 respectively provide different levels of surge protection to ensure effective protection of the circuit in different levels of surge events.

[0065] In the present embodiment, the second functional circuit 230 is a bridge rectifier circuit 231, and the fourth functional circuit 430 is a MOS tube switch control type bridge rectifier circuit 431; the first input end 110 and the fourth low-loss surge protection circuit 420 are provided with a fuse 441, an overvoltage protection element 442 and a common mode inductor 443; and the second input end 210 and the second low-loss surge protection circuit 220 are also provided with a fuse 241, an overvoltage protection element 242 and a common mode inductor 243.

[0066] The MOS bridge rectifier circuit 431 is composed of four MOSFET tubes arranged in a bridge structure. The basic principle is to control the current direction by using the switching characteristics of the MOSFET tube. When the input AC voltage is positive, the MOSFET tube is controlled to be on and off, so that the current flows in the desired direction, thereby realizing the rectification function. Compared with the traditional bridge rectifier circuit, four diodes are required, while the MOS bridge rectifier circuit 431 uses MOSFET instead of diode, which can reduce the output voltage drop caused by the diode forward voltage drop and improve the efficiency.

[0067] In the embodiment, the first type of anti-surge circuit includes two first temperature-sensitive normally open switches KT1. The two first temperature-sensitive normally open switches KT1 can provide redundant protection, so that even if one of the switches fails, the other can still work, thereby improving the reliability of the system. Of course, two different temperature-sensitive normally open switches can be set to different action temperatures to provide protection at different temperature stages and achieve more precise temperature control.

[0068] The above is only the best embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes or modifications made within the scope of the patent application of the present application are covered by the present application.

Claims

1. A temperature responsive surge protection device, characterized by: The anti-surge protection device is connected with an external power supply, so the anti-surge protection device is provided with a plurality of socket modules, each of which is provided with a low-loss anti-surge circuit, and each of the low-loss anti-surge circuits is connected with an input end of the external power supply respectively; wherein, At least one of the low-loss anti-surge circuits is a second type of anti-surge circuit; The second type of anti-surge circuit includes a second NTC resistor and a temperature sensing normally closed switch connected in series to the live wire, and constitutes a first branch, and the second type of anti-surge circuit further includes at least one second temperature sensing normally open switch connected in parallel with the first branch; The opening temperature point of the temperature sensing normally closed switch is higher than the closing temperature point of the second temperature sensing normally open switch.

2. The temperature responsive surge protection device of claim 1, wherein: At least one of the low-loss anti-surge circuits is a first type of anti-surge circuit, the first type of anti-surge circuit includes a first NTC resistor connected in series to the live wire, and a first temperature sensing normally open switch connected in parallel to the first NTC resistor; the opening temperature point of the temperature sensing normally closed switch is higher than the closing temperature point of the first temperature sensing normally open switch.

3. The temperature-responsive surge protection device of claim 2, wherein: The live wire of the first input end of the external power supply is connected with a first functional circuit through a first low-loss anti-surge circuit as a second type of anti-surge circuit, and the temperature sensing normally closed switch and the second temperature sensing normally open switch of the first low-loss anti-surge circuit are arranged close to heat source components of the first functional circuit, or the temperature sensing normally closed switch and the second temperature sensing normally open switch of the first low-loss anti-surge circuit are connected and arranged with the heat source components of the first functional circuit through a first heat conduction member; The live wire of the third input end of the external power supply is connected with a third functional circuit through a third low-loss anti-surge circuit as a second type of anti-surge circuit, and the temperature sensing normally closed switch and the second temperature sensing normally open switch of the third low-loss anti-surge circuit are arranged close to heat source components of the third functional circuit, or the temperature sensing normally closed switch and the second temperature sensing normally open switch of the third low-loss anti-surge circuit are connected and arranged with the heat source components of the third functional circuit through a third heat conduction member.

4. The temperature-responsive surge protection device of claim 3, wherein: The first functional circuit and the third functional circuit are both bridge rectifier circuits; a fuse, an overvoltage protection element and a common mode inductor are arranged between the first input end and the first low-loss anti-surge circuit; and a fuse, an overvoltage protection element and a common mode inductor are also arranged between the third input end and the third low-loss anti-surge circuit.

5. The temperature-responsive surge protection device of claim 2, wherein: The first type of anti-surge circuit includes two first temperature sensing normally open switches.

6. The temperature-responsive surge protection device according to claim 1 or 5, characterized in that: The live wire of the first input end of the external power supply is connected with a fourth functional circuit through a fourth low-loss anti-surge circuit as a first type of anti-surge circuit, and the temperature sensing normally closed switch of the fourth low-loss anti-surge circuit is arranged close to heat source components of the fourth functional circuit, or the temperature sensing normally closed switch of the fourth low-loss anti-surge circuit is connected and arranged with the heat source components of the fourth functional circuit through a fourth heat conduction member; The firewire of the second input end of the external power supply is connected with the second functional circuit through the second low-loss surge protection circuit as the first type of surge protection circuit, and the temperature sensing normally closed switch of the second low-loss surge protection circuit is arranged close to the heat source component of the second functional circuit, or the temperature sensing normally closed switch of the second low-loss surge protection circuit is arranged in connection with the heat source component of the second functional circuit through the second heat conduction member.

7. The temperature-responsive surge protection device of claim 6, wherein: The second functional circuit is a bridge rectifier circuit, and the fourth functional circuit is a MOS tube switch control type bridge rectifier circuit; a fuse, an overvoltage protection element and a common mode inductor are arranged between the first input end and the fourth low-loss surge protection circuit; and a fuse, an overvoltage protection element and a common mode inductor are also arranged between the second input end and the second low-loss surge protection circuit.

8. The temperature-responsive surge protection device of claim 2, wherein: The recovery temperature point of the temperature sensing normally closed switch to the initial state is higher than the recovery temperature point of the first temperature sensing normally open switch to the initial state.

9. The temperature-responsive surge protection device of claim 1, wherein: The recovery temperature point of the temperature sensing normally closed switch to the initial state is higher than the recovery temperature point of the second temperature sensing normally open switch to the initial state.

10. An adapter system, characterized by It comprises: an external power supply; The surge protection device as claimed in any of claims 1 to 8 is connected with the external power supply, so the surge protection device is provided with a plurality of socket modules, each of which is provided with a low-loss surge protection circuit; a plurality of functional circuits, which are respectively connected with corresponding low-loss surge protection circuits.

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