Power carrier through core capacitor and power information security device and information security power socket

Abstract

The application discloses a power carrier through-hole capacitor and power information security device and information security power socket, the power carrier through-hole capacitor comprises a through-hole capacitor which is composed of an outer electrode, a capacitor dielectric and an inner electrode; the outer electrode is a hollow cylindrical threaded shell; the inner electrode is a circular tubular inner shell; the inner shell is arranged axially in the threaded shell, and one end side of the inner shell is a signal transmission leading-out end of the inner electrode; the capacitor dielectric is filled between the inner shell and the threaded shell; the power carrier through-hole capacitor further comprises a power transmission conductor which is arranged axially in the inner shell, and an insulating isolation material is filled between the power transmission conductor and the inner shell. Compared with common through-hole capacitors, the power carrier through-hole capacitor is more suitable for power carrier filter circuits which combine power transmission installation connecting seats and filter seats, and is convenient to install and saves time and labor during production.

Description

TECHNICAL FIELD

[0001] The present application relates to a through-hole capacitor, a through-hole capacitor for power carrier, and a power information security device, a power socket, in particular, a power carrier through-hole capacitor and a power information security device and an information security power socket. BACKGROUND

[0002] The existing information security power socket against electromagnetic interference and against electromagnetic leakage, in which an electromagnetic interference (EMI) filter is commonly used, the low-pass filter can transmit the power supply power of direct current, 50Hz or 400Hz to the electrical equipment without attenuation, greatly attenuate the EMI signal transmitted through the power supply, protect the electrical equipment from the harm of electromagnetic interference; at the same time, it can effectively suppress the EMI signal generated by the electrical equipment itself, prevent the noise generated inside the electrical equipment from leaking outside, pollute the electromagnetic environment and harm other equipment. The power EMI filter is an indispensable device to help electromagnetic equipment and system meet the relevant electromagnetic compatibility standards.

[0003] The circuit of the commonly used EMI filter is as follows Figure 4As shown, the filter includes an electromagnetic interference suppression circuit composed of inductors, capacitors, and resistors connected in series / parallel. It includes a common-mode interference suppression circuit unit and a differential-mode interference suppression circuit unit. Cx is connected between the phase line (L line) and the neutral line (N line) and is called a differential-mode capacitor; Cy is connected between the phase line (L line) or the neutral line (N line) and the ground line (E line) and is called a common-mode capacitor. The first coil L1 and the second coil L2 are each wound on a ring-shaped first ferrite core Z1 to form a first common-mode filter inductor; the third coil L3 and the fourth coil L4 are each wound on a ring-shaped second ferrite core Z2 to form a second common-mode filter inductor; the two ends of the first differential-mode capacitor Cx1 are respectively connected to the input terminals of the first coil L1 and the second coil L2. The input terminal of the first coil L1 is electrically connected to the L line, and the input terminal of the second coil L2 is electrically connected to the N line. The two ends of the third differential-mode capacitor Cx3 are connected to the output terminals of the third coil L3 and the fourth coil L4, respectively. The output terminal of the third coil L3 is electrically connected to the L' line of the power supply output, and the output terminal of the fourth coil L4 is electrically connected to the N' line of the power supply output. The two ends of the second differential-mode capacitor Cx2 are connected in parallel with the two ends of the resistor R. One end of the second differential-mode capacitor Cx2 is electrically connected to the output terminal of the first coil L1 and the input terminal of the third coil L3, and the other end of the second differential-mode capacitor Cx2 is electrically connected to the output terminal of the second coil L2 and the input terminal of the fourth coil L4. One end of the first common-mode capacitor Cy1 is electrically connected to the connection point of the first coil L1 and the third coil L3, and the other end of the first common-mode capacitor Cy1 is electrically connected to the E line. One end of the second common-mode capacitor Cy2 is electrically connected to the connection point of the second coil L2 and the fourth coil L4, and the other end of the second common-mode capacitor Cy2 is electrically connected to the E line.

[0004] Existing common-mode capacitors (Cy) often use ceramic capacitors. However, these capacitors have the following drawbacks due to their low operating current and low voltage rating:

[0005] 1. In the event of a lightning strike, high voltage is transmitted to the electrical equipment in the socket through the power carrier line, which may result in a lightning strike accident.

[0006] 2. The capacitance of ceramic capacitors changes with ambient temperature, and this change affects the filter cutoff rate; the bypass and coupling effects are poor, and they cannot effectively prevent high-frequency signals from being directly coupled from the input to the output. They also cannot effectively suppress interference signals in low-pass transmission signals.

[0007] 3. The current drawn by this type of ceramic capacitor is too small when it is working, which results in poor filtering effect and function, directly leading to a weakening of security and confidentiality capabilities.

[0008] 4. It cannot meet the filtering circuit requirements for various transmission rates in low-voltage power line carrier distribution networks;

[0009] 5. Narrow and wide band filtering not applicable to power and telecommunications combined. SUMMARY

[0010] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a power carrier through-hole capacitor and a power information security device and a corresponding information security power socket, so as to solve the problem of small working current and low voltage resistance of the common-mode capacitor Cy ceramic capacitor in the power EMI filter circuit of the prior art, and the disadvantages caused by the power information security device and the corresponding information security power socket.

[0011] The technical solution for achieving the purpose of the present application is:

[0012] A power carrier through-hole capacitor, comprising a through-hole capacitor composed of an outer electrode, a capacitor dielectric and an inner electrode;

[0013] The outer electrode is a hollow cylindrical threaded shell; the inner electrode is a circular tubular inner shell;

[0014] The inner shell is axially arranged in the threaded shell, and one end side of the inner shell is a signal transmission lead-out end of the inner electrode; the capacitor dielectric is filled between the inner shell and the threaded shell;

[0015] Further comprising

[0016] A power transmission conductor, which is axially arranged in the inner shell, and an insulating separation material is filled between the power transmission conductor and the inner shell.

[0017] Further, a multi-angle nut is provided, which is screwed with the threaded shell.

[0018] Preferably, the multi-angle nut is a hexagonal nut.

[0019] The power carrier through-hole capacitor has the following advantages: compared with ordinary through-hole capacitors, the power carrier through-hole capacitor is more suitable for power carrier filter circuits combined with telecommunications filtering and power transmission mounting connectors, and is convenient to install and saves time and labor during production.

[0020] A power information security device, comprising an electromagnetic shielding shell and an electromagnetic interference (EMI) filter, the electromagnetic interference filter being arranged in the electromagnetic shielding shell; the electromagnetic interference filter comprises an anti-electromagnetic interference filter circuit composed of an inductor, a capacitor and a resistor in series / parallel combination, comprising a common-mode interference suppression circuit unit and a differential-mode interference suppression circuit unit, and further comprising the above-mentioned power carrier through-hole capacitor, the first common-mode capacitor Cy1 and the second common-mode capacitor Cy2 of the common-mode interference suppression circuit unit both adopt the power carrier through-hole capacitor.

[0021] The first common mode capacitor Cy1 and the second common mode capacitor Cy2 are arranged at one side end of the electromagnetic shielding shell; the threaded shell of the first common mode capacitor Cy1 is screwed with the shell of the electromagnetic shielding shell, that is, the first threaded shell of the first common mode capacitor Cy1 is connected with the ground wire E through the shell as the outer electrode of the power carrier through-hole capacitor, and the power transmission conductor of the first common mode capacitor Cy1 is the L line welding piece; the threaded shell of the second common mode capacitor Cy2 is screwed with the shell of the electromagnetic shielding shell, that is, the second threaded shell of the second common mode capacitor Cy2 is connected with the ground wire E through the shell as the outer electrode of the power carrier through-hole capacitor, and the power transmission conductor of the second common mode capacitor Cy2 is the N line welding piece;

[0022] The other side end of the electromagnetic shielding shell is provided with two power output terminal connecting seats, that is, a first power output terminal connecting seat and a second power output terminal connecting seat;

[0023] The first coil L1 and the second coil L2 are each wound on the annular first ferrite magnetic core Z1 to form a first common mode filter inductor; the third coil L3 and the fourth coil L4 are each wound on the annular second ferrite magnetic core Z2 to form a second common mode filter inductor;

[0024] The first differential mode capacitor Cx1 is connected at two ends thereof to the input end of the first coil L1 and the input end of the second coil L2, respectively, the input end of the first coil L1 is electrically connected with the L line welding piece, and the input end of the second coil L2 is electrically connected with the N line welding piece;

[0025] The third differential mode capacitor Cx3 is connected at two ends thereof to the output end of the third coil L3 and the output end of the fourth coil L4, respectively, the output end of the third coil L3 is electrically connected with the L' line welding piece of the first power output terminal connecting seat, and the output end of the fourth coil L4 is electrically connected with the N' line welding piece of the second power output terminal connecting seat;

[0026] The two ends of the second differential mode capacitor Cx2 are connected in parallel with the two ends of the resistor R, one end of the second differential mode capacitor Cx2 is electrically connected with the output end of the first coil L1 and the input end of the third coil L3, and the other end of the second differential mode capacitor Cx2 is electrically connected with the output end of the second coil L2 and the input end of the fourth coil L4;

[0027] The inner end electrode of the first common mode capacitor Cy1 is electrically connected with the connection position of the first coil L1 and the third coil L3, and the inner end electrode of the second common mode capacitor Cy2 is electrically connected with the connection position of the second coil L2 and the fourth coil L4;

[0028] The outer wall of the electromagnetic shielding shell is provided with a ground connection piece;

[0029] The electromagnetic interference filter is filled and sealed in the shell of the electromagnetic shielding shell by epoxy resin.

[0030] Further, the first common-mode filter inductor and the second common-mode filter inductor are arranged along the direction of the power supply line from the power supply input to the power supply output in the electromagnetic shielding shell; the first differential-mode capacitor Cx1 is arranged at the lower end of the first common-mode filter inductor; the third differential-mode capacitor Cx3 is arranged at the lower end of the second common-mode filter inductor; the second differential-mode capacitor Cx2 and the resistor R arranged in parallel are arranged between the first common-mode filter inductor and the second common-mode filter inductor in a vertical manner, and the two side surfaces of the second differential-mode capacitor Cx2 are respectively in contact with the outer side surfaces of the first ferrite magnetic core Z1 and the second ferrite magnetic core Z2.

[0031] The power supply information security device with the power carrier through-capacitor has the following advantages or effects:

[0032] 1. Lightning strike accident is prevented. When lightning strikes, the high voltage can be prevented from being transmitted to the power equipment on the socket through the power carrier line, thereby playing a role in lightning strike prevention.

[0033] 2. Compared with other types of capacitors in the prior art circuit, the capacity change of the through-capacitor is less affected by the environmental temperature, and the filter cutoff rate is affected by the capacity change. The inductance generated by the through-capacitor is the smallest, and it is a pure capacitance filter effect, and the bypass and coupling effects are good. In particular, it can effectively prevent high-frequency signals from being directly coupled from the input end to the output end, and can effectively suppress interference signals in the transmission signal of the low-pass EMI filter.

[0034] 3. Compared with other types of capacitors in the prior art filter circuit, it can flow through a large current of dozens of amperes, thereby improving and amplifying the filtering effect and function, effectively improving the office environment and circuit information system security capability, and effectively enhancing the prevention of electromagnetic radiation and power carrier caused by leakage;

[0035] 4. It can meet the filtering circuit requirements of various transmission rates of the power line carrier low-voltage distribution network.

[0036] 5. It is suitable for the application of narrow and wideband power carrier new technology of power supply and telecommunications combined into one.

[0037] 6. The power carrier through-capacitor also has the advantages of easy installation, time saving and labor saving.

[0038] The information security power socket comprises a power plug and a power strip, the power strip is provided with a power socket, and the power information security device is arranged between the connecting line of the power plug and the power socket of the power strip.

[0039] Further, the metal plug-in connecting member in the power socket is a face contact plug-in connecting member and / or a latching plug-in connecting member.

[0040] The information security power socket has the following advantages or effects:

[0041] A new electromagnetic EMI related technology is formed, the protection effect of the electromagnetic interference signal is enhanced, the electromagnetic compatibility is better, the influence on the human body radiation is reduced, and the anti-interference ability is stronger; the power carrier through-capacitor has the advantages of convenient installation, time and labor saving. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The structure schematic diagram of the power carrier through-capacitor of the embodiment 1 is shown in the figure;

[0043] Figure 2 The structure schematic diagram of the power carrier through-capacitor of the embodiment 1 is shown in the figure;

[0044] Figure 3 The structure schematic diagram of the power carrier through-capacitor of the embodiment 1 is shown in the figure;

[0045] Figure 4 The principle schematic diagram of the electromagnetic interference filter circuit is shown in the figure;

[0046] Figure 5 The structure connection schematic diagram of the power information security device with the opened electromagnetic shielding shell end cover in the embodiment 2 is shown in the figure;

[0047] Figure 6 The structure connection schematic diagram of the information security power socket using the power information security device in the embodiment 3 is shown in the figure.

[0048] In the figure, 1. threaded shell 2. capacitor dielectric 3. inner shell 4. power transmission conductor 5. insulating isolation material 6. nut 7. electromagnetic shielding shell 7-1. shell 8. first threaded shell 9. first power transmission conductor 10. second threaded shell 11. second power transmission conductor 12. first power supply output terminal connector 13. second power supply output connector 14. first inner terminal electrode 15. second inner terminal electrode 16. ground connection tab 17. power supply plug 18. patch panel 19. power supply socket. DETAILED DESCRIPTION

[0049] The application will be further described with reference to the drawings and embodiments. It is obvious that the described embodiments are only some of the embodiments of the application, but not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the application.

[0050] Embodiment 1

[0051] As shown in the figure, a power carrier through-hole capacitor comprises a through-hole capacitor composed of an outer terminal electrode, a capacitor dielectric 2 and an inner terminal electrode; Figures 1-3

[0052] The outer terminal electrode is a hollow cylindrical threaded shell 1; the inner terminal electrode is a circular tubular inner shell 3;

[0053] The inner shell 3 is axially arranged in the threaded shell 1, and one end side of the inner shell 3 is a signal transmission lead-out end of the inner terminal electrode; the capacitor dielectric 2 is filled between the inner shell 3 and the threaded shell 1;

[0054] Further comprising

[0055] A power transmission conductor 4 is axially arranged in the inner shell 3, and the power transmission conductor 4 is filled with an insulating isolation material 5 between the power transmission conductor 4 and the inner shell 3.

[0056] The capacitor dielectric 2 is made of ceramic; and the insulating isolation material 5 is made of epoxy resin.

[0057] A polygonal nut 6 is included, and the polygonal nut 6 is screwed with the threaded shell 1. In this example, the polygonal nut 6 is a hexagonal nut.

[0058] Embodiment 2

[0059] As shown in the figure, a power carrier through-hole capacitor comprises a through-hole capacitor composed of an outer terminal electrode, a capacitor dielectric 2 and an inner terminal electrode; Figure 4 Figure 5 ​As shown, a power supply information security device includes an electromagnetic shielding shell 7 and an electromagnetic interference (EMI) filter arranged in the electromagnetic shielding shell 7; the electromagnetic interference filter includes an anti-electromagnetic interference filter circuit composed of an inductor, a capacitor and a resistor in series / parallel combination, includes a common-mode interference suppression circuit unit and a differential-mode interference suppression circuit unit, and further includes the power carrier through-capacitor of Embodiment 1, and the first common-mode capacitor Cy1 and the second common-mode capacitor Cy2 of the common-mode interference suppression circuit unit both adopt the power carrier through-capacitor. The capacity of the power carrier through-capacitor is 3300-4700 pF.

[0060] The first common-mode capacitor Cy1 and the second common-mode capacitor Cy2 are both arranged at one side end of the electromagnetic shielding shell 7; the first threaded shell 8 of the first common-mode capacitor Cy1 is screwed with the shell body 7-1 of the electromagnetic shielding shell 7 and is fixed by a nut, and the first power transmission conductor 9 of the first common-mode capacitor Cy1 is an L-line welding piece; the second threaded shell 10 of the second common-mode capacitor Cy2 is screwed with the shell body 7-1 of the electromagnetic shielding shell 7 and is fixed by a nut, and the second power transmission conductor 11 of the second common-mode capacitor Cy2 is an N-line welding piece; the first threaded shell 8 of the first common-mode capacitor Cy1 is connected with the ground wire E through the shell body 7-1 as an outer electrode of the power carrier through-capacitor; the second threaded shell 10 of the second common-mode capacitor Cy2 is connected with the ground wire E through the shell body 7-1 as an outer electrode of the power carrier through-capacitor;

[0061] The other side end of the electromagnetic shielding shell 7 is provided with two power output terminal connectors, i.e., a first power output terminal connector 12 and a second power output terminal connector 13;

[0062] The first coil L1 and the second coil L2 are each wound 10 turns on the annular first ferrite magnetic core Z1 to form a first common-mode filter inductor; the third coil L3 and the fourth coil L4 are each wound 10 turns on the annular second ferrite magnetic core Z2 to form a second common-mode filter inductor;

[0063] The two ends of the first differential-mode capacitor Cx1 are respectively connected with the input end of the first coil L1 and the input end of the second coil L2, the input end of the first coil L1 is welded with the L-line welding piece in the shell body 7-1, i.e., the input end of the first coil L1 is welded with the first power transmission conductor 9; the input end of the second coil L2 is welded with the N-line welding piece in the shell body 7-1, i.e., the input end of the second coil L2 is welded with the second power transmission conductor 11; the capacity of the first differential-mode capacitor Cx1 is 0.1 μF;

[0064] The two ends of the third differential mode capacitor Cx3 are connected to the output end of the third coil L3 and the output end of the fourth coil L4, respectively, the output end of the third coil L3 is welded to the L' wire welding piece of the first power output connecting seat 12, and the output end of the fourth coil L4 is welded to the N' wire welding piece of the second power output connecting seat 13; the capacity of the third differential mode capacitor Cx3 is 0.1 μF;

[0065] The two ends of the second differential mode capacitor Cx2 are connected in parallel to the two ends of the resistor R, one end of the second differential mode capacitor Cx2 is welded to the output end of the first coil L1 and the input end of the third coil L3, and the other end of the second differential mode capacitor Cx2 is welded to the output end of the second coil L2 and the input end of the fourth coil L4; the capacity of the second differential mode capacitor Cx2 is 0.1 μF; the resistance of the resistor R is 1.0 MΩ.

[0066] The first inner end electrode 14 of the first common mode capacitor Cy1 is welded to the connection of the first coil L1 and the third coil L3, the first inner end electrode 14 is the inner shell of the power carrier through-hole capacitor, and the signal transmission lead-out end of the inner end electrode of the inner shell is welded to the connection of the first coil L1 and the third coil L3; the second inner end electrode 15 of the second common mode capacitor Cy2 is welded to the connection of the second coil L2 and the fourth coil L4, the second inner end electrode 15 is the inner shell of the power carrier through-hole capacitor, and the signal transmission lead-out end of the inner end electrode of the inner shell is welded to the connection of the second coil L2 and the fourth coil L4.

[0067] The outer wall of the electromagnetic shielding shell 7 is welded with a grounding connecting piece 16 to facilitate the welding of the external grounding wire.

[0068] The electromagnetic interference filter is filled and sealed in the electromagnetic shielding shell body 7-1 by epoxy resin.

[0069] The first common mode filter inductor and the second common mode filter inductor are arranged in the electromagnetic shielding shell body 7-1 along the direction from the power supply inlet to the power supply output; the first differential mode capacitor Cx1 is arranged at the lower end of the first common mode filter inductor; the third differential mode capacitor Cx3 is arranged at the lower end of the second common mode filter inductor; the parallelly connected second differential mode capacitor Cx2 and the resistor R are arranged vertically between the first common mode filter inductor and the second common mode filter inductor, the two side surfaces of the second differential mode capacitor Cx2 are respectively in contact with the outer side surfaces of the first ferrite magnetic core Z1 and the second ferrite magnetic core Z2, so as to reduce the electromagnetic interference between the elements.

[0070] The electromagnetic shielding shell 7 is made of metal zinc.

[0071] The electromagnetic shielding shell 7 includes a shell body 7-1 and an end cover, the end cover is connected to the shell body 7-1 as a whole by clamping or welding, and the electromagnetic interference filter filled with epoxy resin is sealed in the electromagnetic shielding shell 7.

[0072] The two power carrier through capacitors are arranged at the power supply inlet end, or the power carrier through capacitors can also be arranged at the power supply outlet end to replace the two power supply outlet connecting seats, and the use effect is the same, and the power carrier through capacitors are arranged at which end is mainly selected according to the convenience of production and installation.

[0073] Embodiment 3:

[0074] As shown in Figure 6 A power supply information security socket, comprising a power plug 17 and a plug-in board 18, the plug-in board 18 is provided with a power socket 19, and further comprising the power supply information security device of embodiment 2, the connecting line of the power plug 17 is connected in series with the power socket 19 on the plug-in board 18 through the power supply information security device of embodiment 2, the L line of the connecting line of the power plug 17 is welded with the L line welding piece of the first common mode capacitor Cy1, that is, the L line of the connecting line of the power plug 17 is welded with the first power transmission conductor 9; the N line of the connecting line of the power plug 17 is welded with the N line welding piece of the second common mode capacitor Cy2, that is, the N line of the connecting line of the power plug 17 is welded with the second power transmission conductor 11; the L' line of the power socket 19 on the plug-in board 18 is welded with the L' line welding piece of the first power supply outlet connecting seat 12, and the N' line of the power socket 19 on the plug-in board 18 is welded with the N' line welding piece of the second power supply outlet connecting seat 13; the E line of the connecting line of the power plug 17 and the E line of the power socket 19 are welded with the ground connection piece 16 on the outer wall of the electromagnetic shielding shell 7.

[0075] The metal plug-in connecting piece in the power socket is a face contact plug-in connecting piece and / or a latching plug-in connecting piece.

[0076] The face contact plug-in connecting piece can adopt the face contact strong current plug-in connecting piece disclosed in the authorized announcement No. CN210074231U, and the latching plug-in connecting piece can adopt the latching plug-in connecting piece disclosed in the authorized announcement No. CN204315862U and / or CN206379516U.

[0077] The plug-in connecting piece adopts a 360° columnar clamping face contact automatic latching structure to replace the traditional eight-shaped two-clamping copper sheet structure, is not easy to deform, does not spark, is firmly connected, overcomes the defects and disadvantages that the contact area of the socket connecting piece is small, the contact is poor, sparking is serious, and equipment damage and fire accidents are easily caused in the prior art.

[0078] The plug-in connecting piece of the socket increases the contact area of the socket when working, is firmly connected, reduces the total contact resistance, sharply reduces the heat generated by the socket and plug, greatly increases the working reliability, thereby effectively prevents the socket and plug from being burned out, the electrical equipment from being damaged, and the fire from occurring, and greatly prolongs the service life of the socket product.

[0079] Compared with the prior art, the socket is more ingenious in design, less in material, and does not increase the process cost, only differs from the existing socket production mold, saves material, and has long service life.

[0080] While the embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that modifications, changes, substitutions and variations can be made by those skilled in the art without departing from the spirit and scope of the application, which is defined solely by the claims and their equivalents.

Claims

1. A power supply information security device comprising an electromagnetic shielded case and an electromagnetic interference (EMI) filter, the electromagnetic interference filter being disposed within the electromagnetic shielded case; the electromagnetic interference filter comprising an electromagnetic interference rejection filter circuit comprising an inductor, a capacitor and a resistor in series / parallel combination, comprising a common mode interference rejection circuit unit and a differential mode interference rejection circuit unit, characterized in that, The power carrier through-capacitor comprises a through-capacitor composed of an outer electrode, a capacitor dielectric and an inner electrode; the outer electrode is a hollow cylindrical threaded shell; the inner electrode is a circular tubular inner shell; the inner shell is arranged axially in the threaded shell, and one end of the inner shell is a signal transmission lead-out end of the inner electrode; the capacitor dielectric is filled between the inner shell and the threaded shell; the power transmission conductor is arranged axially in the inner shell, and the power transmission conductor and the inner shell are filled with insulating isolation material therebetween; The first common-mode capacitor Cy1 and the second common-mode capacitor Cy2 of the common-mode interference suppression circuit unit both adopt the power carrier through-capacitor; The first common-mode capacitor Cy1 and the second common-mode capacitor Cy2 are both arranged at one side end of the electromagnetic shielding shell; the threaded shell of the first common-mode capacitor Cy1 is screwed with the shell body of the electromagnetic shielding shell, and the power transmission conductor of the first common-mode capacitor Cy1 is an L-line soldering piece; the threaded shell of the second common-mode capacitor Cy2 is screwed with the shell body of the electromagnetic shielding shell, and the power transmission conductor of the second common-mode capacitor Cy2 is an N-line soldering piece; The first coil L1 and the second coil L2 are each wound on the annular first ferrite magnetic core Z1 to form a first common-mode filter inductor; The third coil L3 and the fourth coil L4 are each wound on the annular second ferrite magnetic core Z2 to form a second common-mode filter inductor; The inner electrode of the first common-mode capacitor Cy1 is electrically connected with the connection of the first coil L1 and the third coil L3; the inner electrode of the second common-mode capacitor Cy2 is electrically connected with the connection of the second coil L2 and the fourth coil L4; The outer wall of the electromagnetic shielding shell is provided with a ground connection piece.

2. The power supply information security device according to claim 1, characterized by The first common-mode filter inductor and the second common-mode filter inductor are arranged along the direction from the power supply inlet to the power supply outlet in the shell body of the electromagnetic shielding shell; the first differential-mode capacitor Cx1 is arranged at the lower end of the first common-mode filter inductor; the third differential-mode capacitor Cx3 is arranged at the lower end of the second common-mode filter inductor; the second differential-mode capacitor Cx2 and the resistor R arranged in a vertical manner between the first common-mode filter inductor and the second common-mode filter inductor after being connected in parallel, and the two side surfaces of the second differential-mode capacitor Cx2 are respectively in contact with the outer side surfaces of the first ferrite magnetic core Z1 and the second ferrite magnetic core Z2.

3. The power securer according to claim 1, wherein The other side end of the electromagnetic shielding shell is provided with two power supply output end connecting seats.

4. The power supply information security device according to claim 3, characterized by The power carrier through-capacitor is arranged at the power supply outlet end, replacing the two power supply output end connecting seats.

5. The power securer of claim 1, wherein The two ends of the first differential-mode capacitor Cx1 are respectively connected with the input end of the first coil L1 and the input end of the second coil L2, the input end of the first coil L1 is electrically connected with the L-line soldering piece, and the input end of the second coil L2 is electrically connected with the N-line soldering piece; The two ends of the third differential-mode capacitor Cx3 are respectively connected with the output end of the third coil L3 and the output end of the fourth coil L4, the output end of the third coil L3 is electrically connected with the L' line soldering piece of the first power supply output end connecting seat, and the output end of the fourth coil L4 is electrically connected with the N' line soldering piece of the second power supply output end connecting seat. Two ends of the second differential mode capacitor Cx2 are connected in parallel with two ends of the resistor R, one end of the second differential mode capacitor Cx2 is electrically connected with the output end of the first coil L1 and the input end of the third coil L3, and the other end of the second differential mode capacitor Cx2 is electrically connected with the output end of the second coil L2 and the input end of the fourth coil L4.

6. The power securer of claim 1, wherein The electromagnetic interference filter is filled and sealed in the electromagnetic shielding shell by epoxy resin.

7. An information security power socket comprising a power plug and a power strip, wherein the power strip is provided with a power socket, characterized in that, The power information security device of claim 1 is connected in series between the connecting wire of the power plug and the power socket on the patch board, the L wire of the connecting wire of the power plug is electrically connected with the L wire welding piece of the first common mode capacitor Cy1, the N wire of the connecting wire of the power plug is electrically connected with the N wire welding piece of the second common mode capacitor Cy2, the L' wire of the power socket on the patch board is electrically connected with the L' wire welding piece of the first power output end connecting seat, the N' wire of the power socket on the patch board is electrically connected with the N' wire welding piece of the second power output end connecting seat, and the E wire of the connecting wire of the power plug and the E wire of the power socket are electrically connected with the ground connecting piece on the outer wall of the electromagnetic shielding shell.

8. The privacy power outlet of claim 7, wherein, The metal plug-in connecting piece in the power socket is a face contact plug-in connecting piece and / or a latching plug-in connecting piece.

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