EMC filtering device and electronic equipment

Abstract

The utility model discloses an EMC filtering device and electronic equipment. The EMC filtering device comprises a power supply connection module, an anti-surge module, a discharge module, an EMC module, a protection module, a switch module and a filtering output module which are connected in sequence. The power connection module is used for being connected to a power supply and receiving power supply voltage provided by the power supply. The anti-surge module is used for clamping the power supply voltage and absorbing surge voltage in the power supply voltage; the discharge module is used for releasing charges in the EMC filtering device after the electronic equipment is powered down; the EMC module is used for filtering electromagnetic interference generated by a power supply and electronic equipment; the protection module is used for cutting off the connection with the power supply when the electronic equipment is overloaded or short-circuited; the switch module is used for connecting or disconnecting the power supply and the electronic equipment; the filtering output module is used for being connected to electronic equipment and transmitting the power supply voltage to the electronic equipment. The safety regulation, the electromagnetic compatibility and the safety protection function of the electronic equipment can be improved.

Description

Technical Field

[0001] This application relates to the technical field, specifically to an EMC filtering device and electronic equipment. Background Technology

[0002] EMC filters (Electromagnetic Compatibility) are crucial components of various electronic devices. Currently, existing EMC filters only provide electromagnetic interference immunity to electronic devices and do not possess other protective functions themselves, thus affecting the stability and safety of electronic equipment. Utility Model Content

[0003] Therefore, this application provides an EMC filtering device and electronic equipment to reduce the failure rate of the EMC filtering device, thereby improving the stability and safety of the electronic equipment. The technical solution of this application is as follows:

[0004] This application provides an EMC filtering device for connecting a power supply and an electronic device, comprising a power connection module, a surge protection module, a discharge module, an EMC module, a protection module, a switch module, and a filter output module connected in sequence; the power connection module is used to connect to the power supply and receive the power supply voltage provided by the power supply; the surge protection module is used to clamp the power supply voltage and absorb surge voltage in the power supply voltage; the discharge module is used to release the charge inside the EMC filtering device after the electronic device is powered off; the EMC module is used to filter out electromagnetic interference generated by the power supply and the electronic device; the protection module is used to disconnect the connection with the power supply when the electronic device is overloaded or short-circuited; the switch module is used to connect or disconnect the connection between the power supply and the electronic device; and the filter output module is used to connect to the electronic device and transmit the power supply voltage to the electronic device.

[0005] In one embodiment of this application, the EMC module includes a first EMC unit and a second EMC unit, and the discharge module, the first EMC unit, the second EMC unit and the protection module are connected in sequence; the first EMC unit is used to filter out electromagnetic interference generated by the power supply and the electronic device; the second EMC unit is used to enhance the filtering of electromagnetic interference generated by the power supply and the electronic device.

[0006] In one embodiment of this application, the first EMC unit includes a first capacitor, a second capacitor, a third capacitor, and a first common-mode inductor; the first terminal and the second terminal of the first capacitor are connected to the discharge module; the first input terminal of the first common-mode inductor is connected to the first terminal of the first capacitor, and the second input terminal of the first common-mode inductor is connected to the second terminal of the first capacitor; the first output terminal of the first common-mode inductor is connected to the second EMC unit and grounded through the second capacitor; the second output terminal of the first common-mode inductor is connected to the second EMC unit and grounded through the third capacitor.

[0007] In one embodiment of this application, the second EMC unit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, and a second common-mode inductor; the first and second terminals of the fourth capacitor are connected to the first EMC unit; the first input terminal of the second common-mode inductor is connected to the first terminal of the fourth capacitor, and the second input terminal of the second common-mode inductor is connected to the second terminal of the fourth capacitor; the first output terminal of the second common-mode inductor is connected to the protection module and grounded through the fifth capacitor; the second output terminal of the second common-mode inductor is connected to the protection module and grounded through the sixth capacitor.

[0008] In one embodiment of this application, the surge protection module includes a varistor, the first end of which is connected to the live wire of the power connection module, and the second end of which is connected to the neutral wire of the power connection module.

[0009] In one embodiment of this application, the discharge module includes a gold film resistor, the first end of which is connected to the live wire of the surge protection module, and the second end of which is connected to the neutral wire of the surge protection module.

[0010] In one embodiment of this application, the protection module includes a first fuse and a second fuse; the live wire terminal of the EMC module is connected to the live wire terminal of the switch module through the first fuse, and the neutral wire terminal of the EMC module is connected to the neutral wire terminal of the switch module through the second fuse.

[0011] In one embodiment of this application, the switch module includes a first switch and a second switch; the live wire terminal of the protection module is connected to the live wire terminal of the filter output module through the first switch, and the neutral wire terminal of the protection module is connected to the neutral wire terminal of the filter output module through the second switch.

[0012] In one embodiment of this application, the power connection module is an AC power socket, and the power supply is AC mains power; the live wire terminal of the AC power socket is used to connect to the live wire of the AC mains power, the neutral wire terminal of the AC power socket is used to connect to the neutral wire of the AC mains power, and the grounding terminal of the AC power socket is used to ground.

[0013] A second aspect of this application provides an electronic device including the aforementioned EMC filtering device.

[0014] It is understood that in the EMC filtering device of this application embodiment, the surge protection module can clamp the high voltage generated when the electronic device is subjected to lightning strikes and surge impacts. The discharge module can prevent the voltage inside the EMC filtering device from rising due to charge accumulation and release the residual charge in the safety capacitor after the electronic device is powered off, further improving human and machine safety during after-sales service of the electronic device. The EMC module can ensure that the electromagnetic interference generated by the electronic device will not pollute the power supply, and the electromagnetic interference generated by the power supply will not pollute the electronic device. The protection module can prevent the electronic device from being damaged due to overload or short circuit. The switch module allows the user to disconnect the connection between the power supply and the electronic device at any time through the switch module of the EMC filtering device, thereby improving the safety, electromagnetic compatibility and safety protection functions of the electronic device. Attached Figure Description

[0015] Figure 1 This is a schematic block diagram of an EMC filtering device provided in an embodiment of this application.

[0016] Figure 2 This is a schematic block diagram of an EMC module provided in an embodiment of this application.

[0017] Figure 3 This is a circuit diagram of an EMC module provided in an embodiment of this application.

[0018] Figure 4 This is a circuit diagram of an EMC filtering device provided in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of the structure of an EMC filtering device provided in an embodiment of this application. Detailed Implementation

[0020] It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.

[0021] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.

[0022] EMC filters (Electromagnetic Compatibility) are crucial components of various electronic devices. Currently, existing EMC filters only provide electromagnetic interference immunity and do not possess other protective functions themselves. Therefore, EMC filters are relatively prone to failure, which can affect the stability and safety of electronic devices.

[0023] For example, currently, EMC filters with switch control and conforming to IEC standards can only allow a maximum overcurrent of 10A. EMC filters with larger overcurrents do not have switch control and do not integrate functions such as fuses and lightning protection. This is extremely unfriendly to mid-range throughput sequencers and other electronic instruments, creating a bottleneck in their application, especially in 110V low-voltage application environments such as Japan, where it poses even greater application challenges.

[0024] This application provides an EMC filtering device and an electronic device. The EMC filtering device integrates lightning protection, safety capacitor current discharge, multi-stage EMC filtering, overcurrent / short circuit protection, and one-button power on / off functionality. This significantly optimizes the number of electronic device components, reduces costs, and enhances safety, EMC, and security protection functions. The electronic device includes a gene sequencer.

[0025] Please refer to Figure 1 , Figure 1 This is a schematic block diagram of an EMC filtering device provided in an embodiment of this application. The EMC filtering device 100 is used to connect a power supply and electronic equipment, and includes a power connection module 110, a surge protection module 120, a discharge module 130, an EMC module 140, a protection module 150, a switch module 160, and a filter output module 170 connected in sequence.

[0026] In this embodiment, the power connection module 110 is used to connect to a power supply and receive the power supply voltage provided by the power supply. The power supply can be an AC power source, such as mains power. The power connection module 110 includes an AC socket, such as a three-hole socket, for connecting to the live wire, neutral wire, and ground wire of the mains power.

[0027] The surge protection module 120 is used to clamp the supply voltage and absorb surge voltages in the supply voltage. In some embodiments, the surge protection module 120 may be provided with a gas discharge tube to discharge high-energy surges in the supply voltage through gas ionization, such as releasing high voltages generated when relays or other switches in the power supply are switched on and off. The surge protection module 120 may also be provided with at least one surge protection element such as a metal oxide resistor, a transient voltage suppression diode, and a semiconductor discharge tube, which is not limited herein.

[0028] The discharge module 130 is used to release the charge inside the EMC filter device 100 after the electronic device loses power, thereby preventing charge accumulation from causing a voltage rise inside the EMC filter device 100, thus avoiding damage to other components in the EMC filter device 100 and preventing electromagnetic interference from affecting the electronic device. In some embodiments, the discharge module 130 may include a passive discharge circuit, for example, a passive discharge circuit composed of multiple high-voltage resistors connected in series, to release residual charge after the electronic device loses power. The discharge module 130 may also include an active discharge circuit, for example, an active discharge circuit composed of a switching transistor, a relay, and a thyristor, which actively conducts the charge discharge path when a power failure or voltage abnormality is detected in the electronic device.

[0029] EMC module 140 is used to filter out electromagnetic interference generated by the power supply and electronic equipment, thereby ensuring that electromagnetic interference generated by the electronic equipment does not pollute the power supply, and electromagnetic interference generated by the power supply does not pollute the electronic equipment. In some embodiments, EMC module 140 may be composed of components such as common-mode inductors, X capacitors, Y capacitors, damping resistors, and damping beads. The common-mode inductor is used to suppress noise between the live or neutral wire of the mains power and ground, the X capacitor is used to filter out differential-mode interference, the Y capacitor is used to filter out common-mode high-frequency noise, and the damping resistor and damping beads are used to suppress resonance peaks and improve high-frequency attenuation.

[0030] Protection module 150 is used to disconnect the power supply when the electronic device is overloaded or short-circuited, thereby preventing damage to the electronic device due to overload or short circuit. Switch module 160 is used to connect or disconnect the power supply and the electronic device, allowing the user to disconnect the power supply and the electronic device at any time via the switch module 160 of the EMC filter device 100, further improving the safety of the electronic device. Filter output module 170 is used to connect to the electronic device and transmit the power supply voltage to the electronic device.

[0031] It is understood that in the EMC filter device 100 of this application embodiment, the surge protection module 120 can clamp the high voltage generated when the electronic device is subjected to lightning strikes and surge impacts. The discharge module 130 can release the residual charge of the safety capacitor after the instrument is powered off, further optimizing human and machine safety during after-sales service. The EMC module 140 can ensure that the electromagnetic interference generated by the electronic device will not pollute the power supply, and the electromagnetic interference generated by the power supply will not pollute the electronic device. The protection module 150 can prevent the electronic device from being damaged due to overload or short circuit. The switch module 160 allows the user to disconnect the connection between the power supply and the electronic device at any time through the switch module 160 of the EMC filter device 100, thereby improving the safety, electromagnetic compatibility and safety protection functions of the electronic device, as well as improving the maintainability and operability of the electronic device.

[0032] In some embodiments, such as Figure 2 As shown, the aforementioned EMC module 140 includes a first EMC unit 141 and a second EMC unit 142. The first EMC unit 141 is connected to both the discharge module 130 and the second EMC unit 142, and the second EMC unit 142 is connected to the protection module 150. The first EMC unit 141 is used to filter out electromagnetic interference in a first frequency band generated by the power supply and electronic equipment, and the second EMC unit 142 is used to filter out electromagnetic interference in a second frequency band generated by the power supply and electronic equipment.

[0033] It is understood that the EMC module 140 of this application can significantly improve the electromagnetic compatibility of the EMC module 140 by processing different frequency bands and types of interference in a layered manner through the first EMC unit 141 and the second EMC unit 142.

[0034] Please refer to Figure 3 , Figure 3 This is a circuit diagram of an EMC module 140 provided in an embodiment of this application. The EMC module 140 includes a first EMC unit 141 and a second EMC unit 142.

[0035] In this embodiment, the first EMC unit 141 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a first common-mode inductor L1. The first and second terminals of the first capacitor C1 are connected to the discharge module 130; the first input terminal of the first common-mode inductor L1 is connected to the first terminal of the first capacitor C1, and the second input terminal of the first common-mode inductor L1 is connected to the second terminal of the first capacitor C1. The first output terminal of the first common-mode inductor L1 is connected to the second EMC unit 142 and grounded through the second capacitor C2; the second output terminal of the first common-mode inductor L1 is connected to the second EMC unit 142 and grounded through the third capacitor C3.

[0036] The second EMC unit 142 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a second common-mode inductor L2. The first and second terminals of the fourth capacitor C4 are connected to the first EMC unit 141. The first input terminal of the second common-mode inductor L2 is connected to the first terminal of the fourth capacitor C4, and the second input terminal of the second common-mode inductor L2 is connected to the second terminal of the fourth capacitor C4. The first output terminal of the second common-mode inductor L2 is connected to the protection module 150 and grounded through the fifth capacitor C5. The second output terminal of the second common-mode inductor L2 is connected to the protection module 150 and grounded through the sixth capacitor C6.

[0037] Please refer to Figure 4 , Figure 4 This is a circuit diagram of an EMC filter device 100 provided in an embodiment of this application. The EMC filter device 100 includes a power connection module 110, a surge protection module 120, a discharge module 130, an EMC module 140, a protection module 150, a switch module 160, and a filter output module 170.

[0038] In this embodiment, the power connection module 110 is an AC power socket, and the power supply is AC mains power. The live wire 3 of the AC power socket is used to connect to the live wire of the AC mains power, the neutral wire 2 of the AC power socket is used to connect to the neutral wire of the AC mains power, and the grounding terminal 1 of the AC power socket is used for grounding.

[0039] EMC module 140 includes a first EMC unit 141 and a second EMC unit 142. The first EMC unit 141 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a first common-mode inductor L1. The first and second terminals of the first capacitor C1 are connected to a discharge module 130. The first input terminal of the first common-mode inductor L1 is connected to the first terminal of the first capacitor C1, and the second input terminal of the first common-mode inductor L1 is connected to the second terminal of the first capacitor C1. The first output terminal of the first common-mode inductor L1 is connected to the second EMC unit 142 and grounded through the second capacitor C2. The second output terminal of the first common-mode inductor L1 is connected to the second EMC unit 142 and grounded through the third capacitor C3. The second EMC unit 142 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a second common-mode inductor L2. The first and second terminals of the fourth capacitor C4 are connected to the first EMC unit 141. The first input terminal of the second common-mode inductor L2 is connected to the first terminal of the fourth capacitor C4, and the second input terminal of the second common-mode inductor L2 is connected to the second terminal of the fourth capacitor C4. The first output terminal of the second common-mode inductor L2 is connected to the protection module 150 and grounded through the fifth capacitor C5. The second output terminal of the second common-mode inductor L2 is connected to the protection module 150 and grounded through the sixth capacitor C6.

[0040] The surge protection module 120 includes a varistor R1. The first end of the varistor R1 is connected to the live wire of the power connection module 110, and the second end of the varistor R1 is connected to the neutral wire of the power connection module 110.

[0041] The discharge module 130 includes a gold film resistor R2. The first end of the gold film resistor R2 is connected to the live wire of the surge protection module 120, and the second end of the gold film resistor R2 is connected to the neutral wire of the surge protection module 120.

[0042] The protection module 150 includes a first fuse F1 and a second fuse F2. The live wire terminal of the EMC module 140 is connected to the live wire terminal of the switch module 160 through the first fuse F1, and the neutral wire terminal of the EMC module 140 is connected to the neutral wire terminal of the switch module 160 through the second fuse F2.

[0043] The switch module 160 includes a first switch K1 and a second switch K2. The live wire terminal of the protection module 150 is connected to the live wire terminal 3 of the filter output module 170 through the first switch K1, and the neutral wire terminal 2 of the protection module 150 is connected to the neutral wire terminal of the filter output module 170 through the second switch K2.

[0044] Please refer to Figure 5 , Figure 5 This is a schematic diagram of an EMC filter device provided in an embodiment of this application. The schematic diagram of the EMC filter device 100 includes the switch module 160, first fuse F1, second fuse F2, AC power socket 111, and screw hole 180 from the above embodiment. The screw hole 180 is used to fix the EMC filter device 100 to an electronic device.

[0045] This application also provides an electronic device, which includes the EMC filtering device 100 of any of the above embodiments. The electronic device includes a gene sequencer. It is understood that the beneficial effects of the electronic device can be referred to the beneficial effects of the EMC filtering device 100 in the foregoing embodiments, and will not be repeated here.

[0046] The embodiments described above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made to the technical solutions of this application by those skilled in the art without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.

Claims

1. An EMC filter arrangement, characterized by Used for connecting power supplies and electronic equipment, including a power connection module, surge protection module, discharge module, EMC module, protection module, switch module and filter output module connected in sequence; The power connection module is used to connect to the power supply and receive the power supply voltage provided by the power supply. The surge protection module is used to clamp the power supply voltage and absorb surge voltage in the power supply voltage; The discharge module is used to release the charge inside the EMC filter device after the electronic device loses power; The EMC module is used to filter out electromagnetic interference generated by the power supply and the electronic equipment. The protection module is used to disconnect the power supply when the electronic device is overloaded or short-circuited. The switching module is used to connect or disconnect the power supply from the electronic device; The filter output module is used to connect to the electronic device and transmit the power supply voltage to the electronic device.

2. The EMC filter arrangement of claim 1, characterized in that The EMC module includes a first EMC unit and a second EMC unit, and the discharge module, the first EMC unit, the second EMC unit and the protection module are connected in sequence. The first EMC unit is used to filter out electromagnetic interference generated by the power supply and the electronic equipment; The second EMC unit is used to enhance the filtering of electromagnetic interference generated by the power supply and the electronic equipment.

3. An EMC filter arrangement as claimed in claim 2, characterised in that, The first EMC unit includes a first capacitor, a second capacitor, a third capacitor, and a first common-mode inductor; The first terminal and the second terminal of the first capacitor are connected to the discharge module; the first input terminal of the first common-mode inductor is connected to the first terminal of the first capacitor, and the second input terminal of the first common-mode inductor is connected to the second terminal of the first capacitor. The first output terminal of the first common-mode inductor is connected to the second EMC unit and grounded through the second capacitor; the second output terminal of the first common-mode inductor is connected to the second EMC unit and grounded through the third capacitor.

4. The EMC filter arrangement of claim 3, wherein, The second EMC unit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, and a second common-mode inductor; The first and second terminals of the fourth capacitor are connected to the first EMC unit; the first input terminal of the second common-mode inductor is connected to the first terminal of the fourth capacitor, and the second input terminal of the second common-mode inductor is connected to the second terminal of the fourth capacitor; the first output terminal of the second common-mode inductor is connected to the protection module and grounded through the fifth capacitor; the second output terminal of the second common-mode inductor is connected to the protection module and grounded through the sixth capacitor.

5. The EMC filter device of claim 1, wherein, The surge protection module includes a varistor, the first end of which is connected to the live wire of the power connection module, and the second end of which is connected to the neutral wire of the power connection module.

6. The EMC filter device of claim 1, wherein, The discharge module includes a gold film resistor, the first end of which is connected to the live wire of the surge protection module, and the second end of which is connected to the neutral wire of the surge protection module.

7. The EMC filter device of claim 1, wherein, The protection module includes a first fuse and a second fuse; The live wire terminal of the EMC module is connected to the live wire terminal of the switch module through the first fuse, and the neutral wire terminal of the EMC module is connected to the neutral wire terminal of the switch module through the second fuse.

8. The EMC filter device of claim 1, wherein, The switch module includes a first switch and a second switch; The live wire terminal of the protection module is connected to the live wire terminal of the filter output module via the first switch, and the neutral wire terminal of the protection module is connected to the neutral wire terminal of the filter output module via the second switch.

9. The EMC filter device of claim 1, wherein, The power connection module is an AC power socket, and the power supply is AC mains power; The live wire terminal of the AC power socket is used to connect to the live wire of the mains power, the neutral wire terminal of the AC power socket is used to connect to the neutral wire of the mains power, and the grounding terminal of the AC power socket is used for grounding.

10. An electronic device, comprising: Includes the EMC filtering device as described in any one of claims 1 to 9.

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