CN215990205U - Strong current filter circuit, control system and air conditioner - Google Patents
Strong current filter circuit, control system and air conditioner Download PDFInfo
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- CN215990205U CN215990205U CN202121910731.1U CN202121910731U CN215990205U CN 215990205 U CN215990205 U CN 215990205U CN 202121910731 U CN202121910731 U CN 202121910731U CN 215990205 U CN215990205 U CN 215990205U
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Abstract
The application provides a strong current filter circuit, a control system and an air conditioner, relates to the technical field of air conditioners, and solves the problem that the air conditioner is easy to burn out due to surge current; the lightning and surge protection module is electrically connected with the power input end; the common-mode interference filtering module is electrically connected with the lightning and surge prevention module; and the differential mode interference filtering module is electrically connected with the lightning protection surge module and the differential mode interference filtering module. The application reduces the damage of the air conditioner caused by lightning surge, and solves the influence of interference of each frequency band generated by the air conditioner on other household appliances.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a strong current filter circuit, a control system and an air conditioner.
Background
In order to make the air conditioner operate more stably, a Power Factor Correction (PFC) measure is usually adopted to reduce harmonic current, so as to reduce interference and damage to a Power grid.
SUMMERY OF THE UTILITY MODEL
The application provides a strong current filter circuit, a control system and an air conditioner which can reduce the damage of the air conditioner caused by lightning surge and solve the problem that the influence of interference of each frequency band generated by the air conditioner on other household appliances is caused.
In one aspect, the present application provides a strong current filter circuit, including:
a power supply input terminal;
the lightning protection surge module is electrically connected with the power input end and is used for absorbing instantaneous overvoltage in the voltage signal output by the power input end;
the common-mode interference filtering module is electrically connected with the lightning protection surge module and is used for filtering common-mode interference signals in the voltage signals output by the lightning protection surge module;
and the differential mode interference filtering module is electrically connected with the lightning protection surge module and the differential mode interference filtering module and is used for filtering differential mode interference signals in the voltage signals output by the lightning protection surge module.
In this application a possible implementation, the power input end includes zero line and live wire, surge module is hit in the lightning protection includes first resistance, second resistance, third resistance and discharge tube, the both ends of first resistance respectively with the zero line with the live wire electricity is connected, the one end of second resistance with the one end of third resistance respectively with the zero line with the live wire electricity is connected, the other end of second resistance with the other end of third resistance all with the one end electricity of discharge tube is connected, the other end and the ground wire electricity of discharge tube are connected.
In one possible implementation manner of the present application, the first resistor, the second resistor, and the third resistor each include a voltage dependent resistor and a thermistor.
In this application a possible implementation, common mode interference filtering module includes first electric capacity, second electric capacity and common mode inductance, common mode inductance includes first coil and second coil, the one end of first coil with the one end of second coil respectively with the both ends electricity of first resistance is connected, the other end of first coil with the one end electricity of first electric capacity is connected, the other end of second coil the one end electricity of second electric capacity is connected, the other end of first electric capacity with the other end of second electric capacity all with the ground wire electricity is connected.
In one possible implementation manner of the present application, the first capacitor and the second capacitor are both Y capacitors.
In a possible implementation manner of the present application, the differential mode interference filtering module includes a third capacitor, a fourth capacitor, a fifth capacitor, and a differential mode inductor, two ends of the third capacitor are electrically connected to one end of the first coil and one end of the second coil, two ends of the fourth capacitor are electrically connected to the other end of the first coil and the other end of the second coil, the fifth capacitor is connected in parallel with the fourth capacitor, and the differential mode inductor is electrically connected to one of the electrical connection lines electrically connected in parallel with the second capacitor and the third capacitor.
In a possible implementation manner of the present application, the third capacitor, the fourth capacitor, and the fifth capacitor are all X capacitors.
In a possible implementation manner of the present application, a fuse is further electrically connected between the live wire and the first resistor.
In another aspect, the present application provides a control system comprising the strong electric filter circuit.
In another aspect, the present application further provides an air conditioner, which includes the control system.
Through this application in through the common mode interference signal and the differential mode interference signal that prevent among the lightning surge module reduction circuit because of lightning surge production, common mode interference signal and differential mode interference signal that exist in rethread common mode interference filtering module and the differential mode interference filtering module filtering circuit reduce the probability that the air conditioner damaged because of lightning surge to the at utmost, make the reliability of air conditioner higher.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a strong electric filter circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiments of the present application provide a strong current filter circuit, a control system and an air conditioner, which will be described in detail below.
Fig. 1 is a schematic diagram of an embodiment of a strong electrical filter circuit according to an embodiment of the present invention, the strong electrical filter circuit includes:
a power input terminal 100;
the lightning protection surge module 200 is electrically connected with the power input end 100 and is used for absorbing instantaneous overvoltage in the voltage signal output by the power input end 100;
the common-mode interference filtering module 300 is electrically connected with the lightning protection surge module 200 and is used for filtering common-mode interference signals in the voltage signals output by the lightning protection surge module 200;
the differential mode interference filtering module 400 is electrically connected to the lightning protection surge module 200 and the differential mode interference filtering module 400, and is configured to filter a differential mode interference signal in the voltage signal output by the lightning protection surge module 200.
According to the lightning protection device, the common-mode interference signal and the differential-mode interference signal generated by lightning surge in the circuit are reduced through the lightning protection surge module 200, the common-mode interference signal and the differential-mode interference signal existing in the circuit are filtered through the common-mode interference filtering module 300 and the differential-mode interference filtering module 400, the probability that the air conditioner is damaged by the lightning surge is reduced to the greatest extent, and the reliability of the air conditioner is higher.
Wherein, the power input end 100 can be a 220V high-voltage commercial power input end with a zero line and a live line, as shown in fig. 1, L in the figure is the live line, N is the zero line, the live line of the power input end 100 is connected with a fuse H1, the fuse H1 power input end 100 can cut off the current when being fused, and the function of the protection circuit is played.
The lightning protection surge module 200 comprises a first resistor ZR1, a second resistor ZR2, a third resistor ZR3 and a discharge tube M1, wherein two ends of the first resistor ZR1 are respectively and electrically connected with a zero line and a live line, one end of the second resistor ZR2 and one end of the third resistor ZR3 are respectively and electrically connected with the zero line and the live line, the other end of the second resistor ZR2 and the other end of the third resistor ZR3 are both electrically connected with one end of the discharge tube M1, and the other end of the discharge tube M1 is electrically connected with a ground line. In the practical application process, the surge includes surge current and surge voltage, the peak value that surpasses the steady value appears in the twinkling of an eye promptly and surpasss the transient overvoltage of normal operating voltage, first resistance ZR1, second resistance ZR2 and third resistance ZR3 are used for surge protection, the surge voltage that reduces power input 100 damages whole circuit and air conditioner, absorb the too high voltage of voltage value of power input 100 input through discharge tube M1, reduce the short circuit phenomenon of circuit, make the circuit more stable, the air conditioner uses safelyr.
The first resistor ZR1, the second resistor ZR2 and the third resistor ZR3 all comprise a piezoresistor and a thermistor, the piezoresistor and the thermistor are all resistor devices with nonlinear volt-ampere characteristics, when the voltage applied to two ends of the first resistor ZR1, the second resistor ZR2 or the third resistor ZR3 exceeds a threshold value, the resistance values of the first resistor ZR1, the second resistor ZR2 or the third resistor ZR3 become small, the current flowing through the first resistor ZR1, the second resistor ZR2 or the third resistor ZR3 is increased rapidly, voltage clamping is carried out, the influence of high voltage on other devices of a circuit is reduced, and the circuit is protected.
The common mode interference filtering module 300 includes a first capacitor CY1, a second capacitor CY2, and a common mode inductor L1, where the first capacitor CY1 and the second capacitor CY2 are both Y capacitors, the common mode inductor L1 includes a first coil and a second coil, one end of the first coil and one end of the second coil are respectively electrically connected to two ends of a first resistor ZR1, as shown in fig. 1, that is, pin 1 of the first coil is connected to the connection node of the first resistor ZR1 and the zero line of the power input terminal 100, pin 2 of the second coil is connected to the connection node of the first resistor ZR1 and the live line of the power input terminal 100, the other end of the first coil is electrically connected to one end of the first capacitor CY1, the other end of the second coil is electrically connected to one end of the second capacitor CY2, that is, the pin 3 of the first coil is electrically connected to one end of the first capacitor CY1, the pin 4 of the second coil is electrically connected to one end of the second capacitor CY2, and the other ends of the first capacitor CY1 and the second capacitor CY2 are both electrically connected to the ground. Common-mode interference in voltage signals output by the lightning protection surge module 200 is suppressed through the first capacitor CY1, the second capacitor CY2 and the common-mode inductor L1, and since the Y capacitor is divided into a Y1 capacitor, a Y2 capacitor, a Y3 capacitor and a Y4 capacitor, high voltage resistance values of different Y capacitors are different, the capacitance values of the first capacitor CY1 and the second capacitor CY2 can be adjusted according to specific practical conditions, and cut-off frequencies of the first capacitor CY1 and the second capacitor CY2 are changed.
The differential mode interference filtering module 400 includes a third capacitor CX1, a fourth capacitor CX2, a fifth capacitor CX3 and a differential mode inductor, the third capacitor CX1, the fourth capacitor CX2 and the fifth capacitor CX3 are both X capacitors, both ends of the third capacitor CX1 are electrically connected to one end of the first coil and one end of the second coil respectively, both ends of the fourth capacitor CX2 are electrically connected to the other end of the first coil and the other end of the second coil respectively, the fifth capacitor CX3 is connected in parallel with the fourth capacitor CX2, and the differential mode inductor is electrically connected to one of the electrical connection lines electrically connected in parallel between the second capacitor CY2 and the third capacitor CX 1. Differential mode interference signals in the voltage signals output by the lightning protection surge module 200 are filtered out through a third capacitor CX1, a fourth capacitor CX2, a fifth capacitor CX3 and differential mode inductance, the X capacitor is divided into an X1 capacitor, an X2 capacitor and an X3 capacitor, the high-voltage-resistant values of different X capacitors are different, the capacitance values of the third capacitor CX1, the fourth capacitor CX2 and the fifth capacitor CX3 can be adjusted according to specific practical situations, and the cutoff frequency of the third capacitor CX1, the fourth capacitor CX2 and the fifth capacitor CX3 is changed.
In another embodiment of the present application, there is also provided a control system including the strong electric filter circuit described in the above embodiment.
In another embodiment of the present application, there is also provided an air conditioner including the control system described in the above embodiment.
The strong current filter circuit, the control system and the air conditioner provided by the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and implementations of the present application, and the description of the embodiments above is only used to help understand the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A strong current filter circuit, comprising:
a power supply input terminal;
the lightning protection surge module is electrically connected with the power input end and is used for absorbing instantaneous overvoltage in the voltage signal output by the power input end;
the common-mode interference filtering module is electrically connected with the lightning protection surge module and is used for filtering common-mode interference signals in the voltage signals output by the lightning protection surge module;
and the differential mode interference filtering module is electrically connected with the lightning protection surge module and the differential mode interference filtering module and is used for filtering differential mode interference signals in the voltage signals output by the lightning protection surge module.
2. The strong electric filter circuit according to claim 1, wherein said power input terminal comprises a zero line and a live line, said lightning protection surge module comprises a first resistor, a second resistor, a third resistor and a discharge tube, two ends of said first resistor are electrically connected to said zero line and said live line, respectively, one end of said second resistor and one end of said third resistor are electrically connected to said zero line and said live line, respectively, the other end of said second resistor and the other end of said third resistor are electrically connected to one end of said discharge tube, and the other end of said discharge tube is electrically connected to a ground line.
3. The strong electrical filter circuit of claim 2, wherein the first resistor, the second resistor, and the third resistor each comprise a voltage dependent resistor and a thermistor.
4. The strong electric filter circuit according to claim 2, wherein the common-mode interference filtering module comprises a first capacitor, a second capacitor and a common-mode inductor, the common-mode inductor comprises a first coil and a second coil, one end of the first coil and one end of the second coil are electrically connected to two ends of the first resistor, respectively, the other end of the first coil is electrically connected to one end of the first capacitor, the other end of the second coil is electrically connected to one end of the second capacitor, and the other end of the first capacitor and the other end of the second capacitor are both electrically connected to the ground line.
5. The strong current filter circuit as claimed in claim 4, wherein said first capacitor and said second capacitor are both Y capacitors.
6. The strong electric filter circuit as claimed in claim 4, wherein said differential mode interference filtering module comprises a third capacitor, a fourth capacitor, a fifth capacitor and a differential mode inductor, two ends of said third capacitor are electrically connected to one end of said first coil and one end of said second coil, two ends of said fourth capacitor are electrically connected to another end of said first coil and another end of said second coil, respectively, said fifth capacitor is connected in parallel with said fourth capacitor, and said differential mode inductor is electrically connected in one of the electrical connection lines where said second capacitor and said third capacitor are electrically connected in parallel.
7. The strong electric filter circuit as set forth in claim 6, wherein said third capacitor, said fourth capacitor and said fifth capacitor are all X capacitors.
8. The strong electric filter circuit as set forth in claim 2, wherein a fuse is electrically connected between said live line and said first resistor.
9. A control system comprising a strong electric filter circuit as claimed in any one of claims 1 to 8.
10. An air conditioner characterized in that it comprises a control system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121910731.1U CN215990205U (en) | 2021-08-13 | 2021-08-13 | Strong current filter circuit, control system and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121910731.1U CN215990205U (en) | 2021-08-13 | 2021-08-13 | Strong current filter circuit, control system and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215990205U true CN215990205U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121910731.1U Active CN215990205U (en) | 2021-08-13 | 2021-08-13 | Strong current filter circuit, control system and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215990205U (en) |
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2021
- 2021-08-13 CN CN202121910731.1U patent/CN215990205U/en active Active
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