CN217486181U - A filter circuit and socket - Google Patents

Abstract

The utility model provides a filter circuit and a socket, which relate to the technical field of electronic circuits. The filter circuit comprises: a plurality of control modules, a plurality of filter modules, a processing module and an operation module; the filter frequency bands of the plurality of filter modules are different; The control module is connected to the input ends of a plurality of filter modules, and the input ends of the plurality of filter modules are used to connect to a preset AC power supply; the operation module is connected to the processing module, and the processing module is connected to a plurality of control modules, so as to send an operation signal to the operation module based on the input of the operation module. The corresponding target control module sends a control signal, so that the target control module controls the target filter module corresponding to the target control module to filter the input alternating current based on the control signal. By adopting the utility model, targeted filtering processing can be provided for different electrical equipment, and specific filtering protection for different electrical equipment can be strengthened.

Description

A filter circuit and socket

technical field

The utility model relates to the technical field of electronic circuits, in particular to a filter circuit and a socket.

Background technique

With the development of power electronics technology, a large number of nonlinear loads are added to the power system, which inevitably injects harmonics into the grid.

If the electrical appliance is directly connected to the AC mains, the harmonics in the power grid will interfere with the electrical appliance and affect the normal use of the electrical appliance.

However, the sockets that can provide the filtering function in the related art can only realize the protection of the whole frequency band, and cannot perform targeted filtering processing for different electrical appliances, resulting in poor filtering effect.

Utility model content

The utility model provides a filter circuit and a socket, which can provide targeted filtering processing for different electrical equipment and strengthen the specific filtering protection for different electrical equipment.

In a first aspect, an embodiment of the present invention provides a filter circuit, including: a plurality of control modules, a plurality of filter modules, a processing module, and an operation module;

The filter frequency bands of the multiple filter modules are different; the multiple control modules are connected to the input ends of the multiple filter modules, and the input ends of the multiple filter modules are used to connect to the preset AC power supply; the operation module is connected to the processing module, so the The processing module is connected to a plurality of the control modules, so as to send a control signal to the target control module corresponding to the target electric device based on the operation signal of the target electric device input by the operation module, so that the target control module Based on the control signal, the target filtering module corresponding to the target control module is controlled to filter the input alternating current.

Optionally, each of the filtering modules includes one or more filtering units connected in series.

Optionally, the filtering unit includes a first capacitor and a common mode inductor, the first capacitor is connected between two input ends of the common mode inductor, and the two input ends of the common mode inductor are the The input end of the filtering unit, and the two output ends of the common mode inductor are the output ends of the filtering unit.

Optionally, the control module includes: a relay, a first diode, a first switch tube, a first resistor, and a second resistor; the control end of the first switch tube is connected to the processing through the first resistor module, the control terminal of the first switch tube is also grounded through the second resistor, the power terminal of the first switch tube is grounded, and the output terminal of the first switch tube is connected to the negative power terminal of the relay, so The positive power terminal of the relay is connected to a preset DC power supply, the positive power terminal of the relay is connected to the negative terminal of the first diode, and the positive terminal of the first diode is connected to the negative power terminal of the relay.

Optionally, the filtering circuit further includes: a display module, and the processing module is connected to the display module.

Optionally, the filter circuit further includes: a first filter detection module and a second filter detection module, the input end of the first filter detection module is connected to the preset AC power supply, and the input of the second filter detection module The terminal is connected to the output terminals of a plurality of the filtering modules, and the output terminal of the first filtering detection module and the output terminal of the second filtering detection module are respectively connected to the processing module.

Optionally, the first filter detection module includes a second diode, a third resistor, a fourth resistor, a fifth resistor, a first optocoupler and a second capacitor; two of the first optocouplers The input terminal is the input terminal of the first filter detection module, the first input terminal of the first optical coupler is connected to the preset AC power supply through the third resistor, and the second input terminal of the first optical coupler is connected to the preset AC power supply. The input terminal is connected to the preset AC power supply through the fourth resistor and the second diode, and the fifth resistor is also connected between the first input terminal and the second input terminal of the first optocoupler ; The first output terminal of the first optical coupler is the output terminal of the first filter detection module; the second output terminal of the first optical coupler is grounded; the first output terminal of the first optical coupler The second capacitor is also connected between the terminal and the second output terminal.

Optionally, the filter circuit further includes a metering module, the input terminal of the metering module is connected to the preset AC power supply and/or the output terminal of the filter module, and the output terminal of the metering module is connected to the processing module. .

Optionally, the filter circuit further includes a power supply module, an input end of the power supply module is used to connect the preset AC power supply, and a plurality of output ends of the power supply module are connected to a plurality of the control modules and the processing unit. The power terminal of the module.

In a second aspect, an embodiment of the present invention further provides a socket, including the filter circuit described in any one of the first aspect.

The utility model provides a filter circuit and a socket. By setting a plurality of filter modules with different filter frequency bands, when a user inputs an operation signal based on the operation module, the processing module can control a target control module among the plurality of control modules based on the user's selection. , so that the target filtering module corresponding to the target control module performs filtering processing on the input alternating current. Through such a filter circuit, different and targeted filtering processing is performed for different electrical equipment, and specific filtering protection for different electrical equipment is strengthened to avoid the adverse effects of harmonics on electrical equipment, and input to different electrical equipment. Alternating current with higher power quality.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of a filter circuit provided by the utility model;

Fig. 2 is the schematic diagram of a kind of filtering unit provided by the utility model;

3 is a schematic diagram of a control module provided by the present invention;

4 is one of another schematic diagrams of a filter circuit provided by the utility model;

Fig. 5 is the second schematic diagram of a filter circuit provided by the utility model;

6 is a schematic diagram of a first filter detection module provided by the present invention;

7 is a schematic diagram of a second filter detection module provided by the present invention;

FIG. 8 is another schematic diagram of a filter circuit provided by the utility model;

9 is a schematic diagram of a metering module provided by the present invention;

FIG. 10 is a schematic diagram of a power module provided by the present invention.

Icons: 1, filter circuit; 10, control module; 20, filter module; 30, processing module; 40, operation module; 50, display module; 60, first filter detection module; 70, second filter filter detection module; 80 , the metering chip.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

Before explaining the present disclosure in detail, the application scenarios of the present disclosure will be introduced.

Since electrical equipment has played an important role in people's production and life, people have also put forward higher and higher requirements for power quality. However, as more and more nonlinear, asymmetric and hedging loads are connected to the power grid, the voltage waveform in the power grid is no longer output in a standard form, and the harmonics of the power grid are becoming more and more serious. The generation of harmonics not only reduces the transmission and utilization efficiency of electric energy, but also makes the electrical equipment easy to overheat, generate vibration and noise, and even burn out in case of failure.

In the prior art, the filtering processing of the input power of the electrical equipment cannot be protected in a targeted manner. Generally, the filtering protection of the whole frequency band is adopted, and there is no enhanced protection of a specific frequency band for different electrical characteristics. Especially for precision electrical equipment, such as computers, TVs, stereos, etc., these precision equipments are more sensitive to the harmonic problem of the input power, and the filtering processing of the whole frequency band cannot achieve high-quality filtering, which is easy to cause the equipment to be inactive and seriously affect. user experience.

Based on this, the present invention proposes a filter circuit and socket. By setting multiple filter modules with different filter frequency bands, when a user inputs an operation signal based on the operation module, the processing module can control the multiple control modules based on the user's selection. The target control module enables the target filter module corresponding to the target control module to perform filtering processing on the input alternating current, thereby realizing different and targeted filtering processing for different electrical equipment.

A number of embodiments are explained below in conjunction with the accompanying drawings. FIG. 1 is a schematic diagram of a filter circuit provided by the present invention. As shown in FIG. 1 , the filter circuit 1 includes: a plurality of control modules 10 , a plurality of filter modules 20 , a processing module 30 and an operation module 40 .

Wherein, the control module 10 may have a controller or a control circuit, which is mainly used to control the cut-off or turn-on of the AC power supply; in this embodiment, the AC power supply may be commercial power, or solar power that is converted into AC power through inverter. The comparison of examples is not limited.

The filtering module 20 can be a filter or a filtering circuit, mainly for filtering the input AC power; the processing module 30 can be an integrated chip with a signal processing function, and the integrated chip can be a Microcontroller Unit (MCU), The central processing unit (Central Processing Unit, CPU), etc., is mainly used to receive data sent by different modules and perform calculation processing; the operation module 40 can be a display screen with a selection function, a key circuit, a physical key, etc., mainly used for different The selection of electrical equipment is not limited in this embodiment.

In this embodiment, the filtering frequency bands of the multiple filtering modules 20 are different, and different filtering frequency bands are suitable for different types of electrical equipment. Multiple different frequency bands can be designed by analyzing the different sensitive frequency bands of different types of electrical equipment to harmonic interference. The parameters of the filtering module 20 are determined, so that the filtering modules 20 with different filtering frequency bands can respectively perform targeted filtering processing for different types of electrical equipment. In a possible implementation manner, four filter modules 20 are designed, and the electrical equipment for which the filter frequency band of the A filter module is designed is a class A electrical equipment, such as e, f, g, etc.; the filter module of the B filter module is designed The electrical equipment for frequency band adaptation is Class B electrical equipment, such as i, j, k, etc.; the electrical equipment for designing the filter frequency band adaptation of the C filter module is Class C electrical equipment, such as u, v, w, etc.; The electrical equipment for which the filter frequency band of the D filter module is designed is Class D electrical equipment, such as x, y, z, etc., among which different filter modules are adapted to different types of electrical equipment, that is, one filter module corresponds to one type of electrical equipment Equipment, each type of electrical equipment can contain multiple electrical equipment. In this embodiment, there is no specific limitation on the specific filtering frequency band of the filtering module 20 , and no limitation is imposed on the number of the filtering modules 20 .

The operation module 40 is connected to the processing module 30, and the processing module 30 is connected to a plurality of control modules 10, so as to send a control signal to the corresponding target control module based on the operation signal input by the operation module 40; The target electrical equipment selects an adapted filtering module on the operation module 40, wherein the target electrical equipment is the electrical equipment that the user wants to access the filter circuit 1, and is any electrical equipment among the above-mentioned multiple types of electrical equipment A plurality of control modules 10 are connected to the input ends of a plurality of filter modules 20, and the input ends of a plurality of filter modules 20 are used to connect a preset AC power supply; so that the target control module controls the target filter module corresponding to the target control module based on the control signal Filter the incoming AC power. Wherein, one control module 10 is connected to one filter module 20, and multiple control modules 10 are respectively connected to multiple filter modules 20, so that different filter modules can be individually controlled.

In a possible implementation manner, if the operation module 40 is a button circuit with 4 buttons, there are 4 control modules 10 and 4 filter modules 20 in this embodiment, and 4 filter modules 20 (A filter module, B Filter module, C filter module, D filter module) correspond to the 4 of A (e, f, g), B (i, j, k), C (u, v, w), D (x, y, z) respectively Class-A electrical equipment, when the user selects f as the target electrical equipment, the user can press the button for the Class-A electrical equipment, so that the operation module 40 can send the input signal for the Class-A electrical equipment to the processing module 30, then The processing module 30 can control the control module 10 connected to the A filter module for the class A electrical device to close based on the signal of the class A electrical device, so that the A filter module can target the f target electrical device accessed by the user. ground filtering.

Optionally, the filter module 20 may further include a surge protection module, the input end of the surge protection module is connected to the AC power supply, and the output end of the surge protection module is connected to the filter module 20, so as to perform anti-surge on the input AC power. surge protection.

In this embodiment, different and targeted filtering processing is performed for different electrical equipment, and specific filtering protection for different electrical equipment is strengthened, so as to avoid the adverse effects of harmonics on electrical equipment, and input to different electrical equipment Alternating current with higher power quality.

Based on the filtering circuit provided in FIG. 1 , optionally, each filtering module 20 in the filtering circuit 1 above includes one or more filtering units connected in series. Among them, in order to achieve efficient filtering of electrical equipment, one or more filter modules can be set up in series to form a filter module. By adjusting the device parameters in the filter unit, different filter modules 20 can be formed to achieve different filter modules. The module 20 implements the function of targeted filtering for different electrical equipment.

In order to clearly illustrate the composition of the filtering unit, the present invention also provides a possible implementation manner of the filtering unit. FIG. 2 is a schematic diagram of a filtering unit provided by the present invention. As shown in FIG. 2, the filter unit includes a first capacitor C1 and a common mode inductor L1, the first capacitor C1 is connected between two input ends of the common mode inductor L1, and the two input ends of the common mode inductor L1 are the filter unit The two output ends of the common mode inductor L1 are the output ends of the filtering unit.

In a possible implementation manner, if the AC power source is commercial power, the two input terminals of the common mode inductor L1 are respectively connected to the neutral wire terminal and the live wire terminal of the commercial power source, and the two output terminals of the common mode inductor L1 are used as the commercial power source. Filtered neutral output and live output.

In this embodiment, a filter module is formed by a combination of one or more filtering units, so as to perform targeted filtering processing on the electrical equipment, so as to prevent the electrical equipment from receiving harmonic interference.

On the basis of the filter circuit provided in the above-mentioned FIG. 1 , the present invention also provides a possible implementation manner of the control module. FIG. 3 is a schematic diagram of a control module provided by the present invention. As shown in FIG. 3 , the control module 10 includes: a relay K1, a first diode D1, a first switch tube Q1, a first resistor R1, and a second resistor R2; the control end of the first switch tube Q1 passes through the first resistor R1 Connect the processing module, the control terminal of the first switch tube Q1 is also grounded through the second resistor R2, the power terminal of the first switch tube R1 is grounded, the output terminal of the first switch tube Q1 is connected to the negative power terminal of the relay K1, and the positive terminal of the relay K1 is connected to the ground. The power terminal is connected to the preset DC power supply, the positive power terminal of the relay K1 is connected to the negative terminal of the first diode D1, and the positive terminal of the first diode D1 is connected to the negative power terminal of the relay.

In this embodiment, the first switch transistor Q1 is an NPN transistor, then the control terminal of the first switch transistor Q1 is the base, the power supply terminal of the first switch transistor Q1 is the emitter, and the output terminal of the first switch transistor Q1 is the collector Electrodes; preset DC power supply is 5V.

Among them, the first resistor R1 connected to the base of the first switch tube Q1 is a current-limiting resistor to prevent the switch tube from being damaged due to excessive base current caused by excessive input voltage amplitude; the function of the second resistor R2 is to connect the first switch The leakage current of the tube Q1 is connected to the ground, which makes the first switch tube Q1 stable and reliable when there is no input voltage in the first switch tube Q1; the first diode D1 connected to the first switch tube Q1 utilizes the unidirectional conduction of the diode to prevent the backflow of current.

Specifically, when the voltage applied to the base of the first switch transistor Q1 is higher than the voltage applied to the emitter of the first switch transistor Q1, the conduction condition of the NPN transistor can be satisfied, so that the first switch transistor Q1 is turned on. In this implementation, the base of the first switch tube Q1 is the input end of the control module 10 , and the processing module 30 controls the on-off of the relay K1 by controlling whether the first switch tube Q1 is turned on or off. When the corresponding filtering module 20 performs filtering, a control signal can be sent to the base of the first switch tube Q1 in the control module 10, so that the first switch tube Q1 is turned on and the relay is powered on. When the relay K1 is powered on, the switch is closed, and the filter module 20 is connected to the AC power supply; when the relay K2 is disconnected, the switch is disconnected, and the connection between the filter module 20 and the AC power supply is disconnected.

In this embodiment, by controlling the on-off of the relay, the on-off between the filter module and the AC power supply is controlled, so as to realize the targeted filtering processing of the electrical equipment by the ground filter module.

On the basis of the filter circuit provided in the above-mentioned FIG. 1 , the present invention also provides another possible implementation manner of the filter circuit. FIG. 4 is another schematic diagram of a filter circuit provided by the present invention. As shown in FIG. 4 , the filter circuit 1 further includes a display module 50 , and the processing module 30 is connected to the display module 50 . Wherein, the display module 50 can be used to display the working state of the filter circuit 1, such as normal, abnormal, and so on.

Optionally, the display module 50 may be a display screen, a display circuit including an indicator light, or the like.

Optionally, in order to alleviate the processing computing resources of the processing module 30, and for the interaction between the operation module 40 and the display module, an optional processing chip can be added between the operation module 40 and the display module 50, so that the operation module 40 can process The chip controls the display content of the display module 50; optionally, the processing chip can also be connected to the processing module 30, and more modules, such as a WIFI module, a temperature control module, etc., can be connected through the processing chip, so that the filter circuit 1 function is more abundant.

In this embodiment, the addition of the display module enables the user to clearly and clearly understand the working state of the filter circuit.

On the basis of the filter circuit provided in the above-mentioned FIG. 4 , the present invention also provides another possible implementation manner of the filter circuit. FIG. 5 is the second schematic diagram of a filter circuit provided by the present invention. As shown in FIG. 5 , the filter circuit 1 further includes: a first filter detection module 60 and a second filter detection module 70 , the input end of the first filter detection module 60 is connected to a preset AC power supply, and the input end of the second filter detection module 70 The output terminals of the multiple filtering modules 20 are connected, and the output terminal of the first filtering detection module 60 and the output terminal of the second filtering detection module are respectively connected to the processing module 30 .

The first filter detection module 60 performs filter detection on the connected AC power to obtain a first detection signal, which is sent to the processing module 30; the second filter detection module 70 performs filter detection on the AC power filtered by the filter module 20, and obtains The second detection signal is sent to the processing module 30; the processing module 30 can compare the first detection signal with the second detection signal, determine the filtering effect of the current filtering circuit 1 according to the preset filtering standard, and determine the filtering effect. sent to the display module 50 . Optionally, if the user selects any electrical device included in the Class A electrical device, the processing module 30 can set the threshold according to the difference between the second detection signal and the first detection signal and the preset filtering of the Class A electrical device. Compare and judge the current filtering effect. If the difference is within the set threshold, it means that the current electrical equipment matches the filter module; if the difference exceeds the set threshold, it means that the current electrical equipment does not match the filter module. When matching, the processing module 30 can send a signal indicating "normal operation" to the display module; when not matching, the processing module 30 can send a signal indicating "abnormal operation" to the display module, then the display module 50 can display the current filter to the user. The working state of circuit 1.

In this embodiment, through the cooperation of the filtering module and the display module twice, the user can quickly know the current filtering effect.

In order to clearly describe the structure of the filter detection circuit, the present invention also provides a possible implementation manner of the filter detection module. FIG. 6 is a schematic diagram of a first filter detection module provided by the present invention. As shown in FIG. 6 , the first filter detection module 60 includes: a second diode D2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first optocoupler OP1 and a second capacitor C2; a first The two input ends of the optocoupler OP1 are the input ends of the first filter detection module 60, the first input end of the first optocoupler OP1 is connected to the preset AC power supply through the third resistor R3, and the first input end of the first optocoupler OP1 is connected to the preset AC power supply. The two input terminals are connected to the preset AC power supply through the fourth resistor R4 and the second diode D2, and the fifth resistor R5 is also connected between the first input terminal and the second input terminal of the first optocoupler OP1; the first optical coupling The first output terminal of the first optical coupler OP1 is the output terminal of the first filter detection module; the second output terminal of the first optical coupler OP1 is grounded; the first output terminal and the second output terminal of the first optical coupler OP1 are also connected The second capacitor C2.

Wherein, the first output end of the first optocoupler OP1 is also connected to a 3.3V DC power supply through a sixth resistor R6.

Specifically, after the first filter detection module is connected to the preset AC power supply, it can detect the harmonics in the preset AC power supply, and pass the detected first detection signal through the first optical coupler OP1. An output terminal is sent to the processing module 30 .

Optionally, FIG. 7 is a schematic diagram of a second filter detection module provided by the present invention. As shown in FIG. 7 , the second filter detection module 70 includes: a third diode D3, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second optocoupler OP2 and a third capacitor C3; a second The two input ends of the optocoupler OP1 are the input ends of the second filter detection module 70, the first input end of the second optocoupler OP2 is connected to the preset AC power supply through the seventh resistor R7, and the first input end of the second optocoupler OP2 is connected to the preset AC power supply. The two input terminals are connected to the preset AC power supply through the eighth resistor R8 and the third diode D3, and the ninth resistor R9 is also connected between the first input terminal and the second input terminal of the first optocoupler OP2; the first optical coupling The first output terminal of the optical coupler OP2 is the output terminal of the first filter detection module; the second output terminal of the first optical coupler OP2 is grounded; the first output terminal and the second output terminal of the first optical coupler are also connected to the Three capacitors C3.

Wherein, the first output end of the second optocoupler OP2 is also connected to a 3.3V DC power supply through a tenth resistor R10.

Specifically, when the second filter detection module is connected to the output end of the filter module 20, it can detect the harmonics in the filtered alternating current, and pass the detected second detection signal through the second optical coupler OP2. The first output terminal is sent to the processing module 30 .

On the basis of the filter circuit provided in the above-mentioned FIG. 1 , the present invention also provides a possible implementation manner of the metering module. FIG. 8 is another schematic diagram of a filter circuit provided by the present invention. As shown in FIG. 8 , the filter circuit 1 further includes a metering module 80 , the input terminal of which is connected to the preset AC power supply and/or the output terminal of the filtering module 20 , and the output terminal of the metering module 80 is connected to the processing module 30 .

Optionally, when the input end of the metering module 80 is connected to a preset AC power supply, the metering of electric energy parameters such as current, voltage, and power factor angle can be performed on the connected AC power supply, so that the results can be transmitted to the processing module 30, which is convenient for The processing module 30 judges the power quality.

Optionally, when the input end of the metering module 80 is connected to the output end of the filtering module 20, the filtered alternating current can be measured for electric energy parameters such as current, voltage, power factor angle, etc., so that the result can be transmitted to the processing module 30, which is convenient for The processing module 30 judges the power quality.

Optionally, when the filter circuit 1 has two metering modules 80, which are respectively connected to the preset AC power supply and the output end of the filter module 20, the processing module 30 can comprehensively judge the current circuit state according to the two measurement results. Optionally, the processing module 30 may send the circuit status to the display module 50 for display.

In order to introduce the metering circuit clearly, the present invention also provides a possible implementation manner of the metering module. FIG. 9 is a schematic diagram of a metering module provided by the present invention. As shown in FIG. 9 , the metering module 80 includes: an eleventh resistor R11 to a nineteenth resistor R19, a fourth capacitor C4 to a seventh resistor C7, a metering chip HLW8032/SOP8; the VIP pin and the VIN pin of the metering chip Connect the fourth capacitor C4 and the fifth capacitor C5 in series, one end of the fourth capacitor C4 and one end of the fifth capacitor C5 share the ground, and an eleventh resistor R11 is connected between the VIP pin of the metering chip and one of the input ends of the metering module; A thirteenth resistor R13 is connected between the VIN pin of the chip and one of the input terminals of the metering module; the twelfth resistor R12 is also connected between the VIP pin and the VIN pin of the metering chip; the V2P pin of the metering chip is connected to the The fourteenth resistor R14 to the seventeenth resistor R17 are connected in series between one of the input terminals of the metering module; the eighteenth resistor R18 and the sixth capacitor C6 are connected to ground in parallel, and are connected to the V2P pin of the metering chip; the VDD lead of the metering chip is connected to the ground in parallel. The pin is connected to the 5V DC power supply through the nineteenth resistor R19, and one end of the nineteenth resistor R19 is also grounded through the seventh capacitor C7; the TX pin of the VDD pin of the metering chip is used as the output end of the metering module 80 for The processing module 30 is connected, and the measurement parameters are sent to the processing module 30 .

In this embodiment, by adding a metering module to the filter circuit, it is possible to measure the connected alternating current, which is convenient for judging the current circuit state.

On the basis of the filter circuit provided in FIG. 1 above, optionally, the filter circuit 1 further includes a power supply module, the input end of the power supply module is used to connect to a preset AC power supply, and the multiple output ends of the power supply module are connected to multiple control modules 10 and the power supply terminal of the processing module 30 . Optionally, the power module supplies power to the relays in the control module 10 .

In this embodiment, the main function of the power module is to convert the connected AC power into DC power and step down to the voltage required by each module in the filter circuit 1 . The power module consists of an AC-DC conversion unit and a DC voltage-stabilizing unit.

Optionally, the power module can also supply power to the optical couplers in the first filter detection module 60 and the second filter detection module 70 .

Optionally, the power supply module can also supply power to the metering chip in the metering module 80 .

Optionally, the present invention also provides a possible implementation manner of the power supply module. FIG. 10 is a schematic diagram of a power module provided by the present invention. As shown in FIG. 10 , the power module includes the twentieth resistor R20 to the twenty-fifth resistor R25, a fuse F1, a first varistor VR1, a second varistor VR2, a first electrolytic capacitor EC1 to a third electrolytic capacitor Capacitor EC3, eighth capacitor C8 to eleventh capacitor C11, fourth diode D4 to sixth diode D6, power switch OB2222M, voltage regulator AMS117, the specific connection relationship is shown in Figure 10.

Among them, the fuse F1, the first varistor VR1, and the second varistor VR2 may constitute a surge module to provide anti-surge treatment for the connected alternating current. The fourth diode D4 provides half-wave rectification, and finally outputs 5V DC through the power switch OB2222M as the first power supply terminal of the power module, and then reduces the 5V voltage to 3.3V through the voltage regulator AMS117, and outputs 3.3V As the second power supply end of the power supply module, so as to perform corresponding power supply processing for various modules in the filter circuit 1 .

Based on the above-mentioned filter circuit 1, an embodiment of the present invention further provides a socket, including any of the above-mentioned filter circuit 1.

To sum up, the filter circuit and socket provided by the present utility model perform different and targeted filtering processing for different electrical equipment, strengthen specific filtering protection for different electrical equipment, and avoid harmonics affecting electrical equipment. Adverse effects, input alternating current with higher power quality to different electrical equipment.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A filter circuit, characterized in that, comprising: a plurality of control modules, a plurality of filter modules, a processing module and an operation module; The filtering frequency bands of a plurality of the filtering modules are different; A plurality of the control modules are connected to the input ends of the filter modules, and the input ends of the filter modules are used to connect to a preset AC power supply; The operation module is connected to the processing module, and the processing module is connected to a plurality of the control modules, so as to send a control signal to the corresponding target control module based on the operation signal input by the operation module, so that the target control module Based on the control signal, the target filtering module corresponding to the target control module is controlled to filter the input alternating current. 2 . The filter circuit according to claim 1 , wherein each of the filter modules comprises one or more filter units connected in series. 3 . 3. The filter circuit according to claim 2, wherein the filter unit comprises a first capacitor and a common mode inductor, the first capacitor is connected between two input ends of the common mode inductor, and the The two input ends of the common mode inductor are the input ends of the filtering unit, and the two output ends of the common mode inductor are the output ends of the filtering unit. 4. The filter circuit according to claim 1, wherein the control module comprises: a relay, a first diode, a first switch tube, a first resistor, and a second resistor; The control terminal is connected to the processing module through the first resistor, the control terminal of the first switch tube is also grounded through the second resistor, the power supply terminal of the first switch tube is grounded, and the power terminal of the first switch tube is grounded. The output terminal is connected to the negative power terminal of the relay, the positive power terminal of the relay is connected to a preset DC power source, the positive power terminal of the relay is connected to the negative terminal of the first diode, and the The positive pole is connected to the negative power supply terminal of the relay. 5 . The filter circuit according to claim 1 , wherein the filter circuit further comprises: a display module, and the processing module is connected to the display module. 6 . 6 . The filter circuit according to claim 5 , wherein the filter circuit further comprises: a first filter detection module and a second filter detection module, the input end of the first filter detection module is connected to the preset AC power supply, the input end of the second filter detection module is connected to the output ends of a plurality of the filter modules, the output end of the first filter detection module and the output end of the second filter detection module are respectively connected to the processing module. 7. The filter circuit according to claim 6, wherein the first filter detection module comprises a second diode, a third resistor, a fourth resistor, a fifth resistor, a first optocoupler and a second capacitor; the two input ends of the first optocoupler are the input ends of the first filter detection module, and the first input end of the first optocoupler is connected to the preset AC through the third resistor a power supply, the second input end of the first optocoupler is connected to the preset AC power supply through the fourth resistor and the second diode, and the first input end of the first optocoupler is connected to the first The fifth resistor is also connected between the two input ends; the first output end of the first optocoupler is the output end of the first filter detection module; the second output end of the first optocoupler is grounded ; The second capacitor is also connected between the first output end and the second output end of the first optocoupler. 8 . The filter circuit according to claim 1 , wherein the filter circuit further comprises a metering module, the input end of the metering module is connected to the preset AC power supply and/or the output end of the filter module, 8 . The output end of the metering module is connected to the processing module. 9 . The filter circuit according to claim 1 , wherein the filter circuit further comprises a power supply module, an input end of the power supply module is used to connect the preset AC power supply, and a plurality of outputs of the power supply module The terminal is connected to a plurality of power terminals of the control module and the processing module. 10. A socket, characterized by comprising the filter circuit according to any one of claims 1-9.

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