CN218005870U - Filter circuit, circuit and air conditioner external unit system - Google Patents
Filter circuit, circuit and air conditioner external unit system Download PDFInfo
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- CN218005870U CN218005870U CN202222129606.8U CN202222129606U CN218005870U CN 218005870 U CN218005870 U CN 218005870U CN 202222129606 U CN202222129606 U CN 202222129606U CN 218005870 U CN218005870 U CN 218005870U
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- filter
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Abstract
The utility model provides an outer machine system of filter circuit, circuit and air conditioner. The method comprises the following steps: a first power transmission line; a second power transmission line; at least one first filter element, a first end of each of the first filter elements being connected to the first power line; at least one second filter element, a first end of each of the second filter elements being connected to the second power line; the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state. The filter circuit can reduce leakage current, thereby improving safety.
Description
Technical Field
The utility model relates to a circuit field, concretely relates to outer machine system of filter circuit, circuit and air conditioner.
Background
The conventional filter circuit often involves handling overvoltage, and the conventional filter circuit generally has a problem that leakage current generated inside the filter circuit is directly grounded, so that the leakage current flows greatly, and the conventional filter circuit has a problem of low safety and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a filter circuit, a circuit and an air conditioner external unit system for solving the above-mentioned problems existing in the prior art.
To achieve the above and other related objects, a first aspect of the present invention provides a filter circuit, including: a first power transmission line; a second power transmission line; at least one first filter element, a first end of each of the first filter elements being connected to the first power line; at least one second filter element, a first end of each of the second filter elements being connected to the second power line; the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state.
In an embodiment of the present invention, the first filter element is a first common mode capacitor, and the second filter element is a second common mode capacitor.
In an embodiment of the present invention, the number of the first common mode capacitors is three, and the number of the second common mode capacitors is three.
In an embodiment of the present invention, the filter circuit further includes a first voltage-sensitive element, a second voltage-sensitive element and a discharge tube, wherein one end of the first voltage-sensitive element is connected to the first power line, one end of the second voltage-sensitive element is connected to the second power line, one end of the discharge tube is connected to the other end of the first voltage-sensitive element and the other end of the second voltage-sensitive element, and the other end of the discharge tube is grounded.
In an embodiment of the present invention, the filter circuit further includes a first common mode inductor and a second common mode inductor, the first end of the first common mode inductor is connected to the first power line, the second end of the first common mode inductor is connected to the second power line, the first end of the second common mode inductor is connected to the third end of the first common mode inductor, the second end of the second common mode inductor is connected to the fourth end of the first common mode inductor, the third end of the second common mode inductor is connected to the first power line, and the fourth end of the second common mode inductor is connected to the second power line.
In an embodiment of the present invention, the filter circuit further includes a differential mode filter unit for suppressing an overvoltage in the filter circuit.
In an embodiment of the present invention, the differential mode filtering unit further includes: the power supply comprises a third voltage-sensitive element, a first differential mode capacitor, a second differential mode capacitor and a resistor, wherein one end of the third voltage-sensitive element is connected with the first power transmission line, the other end of the third voltage-sensitive element is connected with the second power transmission line, one end of the first differential mode capacitor is connected with one end of the third voltage-sensitive element and the first end of the first common mode inductor, the other end of the first differential mode capacitor is connected with the other end of the third voltage-sensitive element and the second end of the first common mode inductor, one end of the second differential mode capacitor is connected with the third end of the second common mode inductor and one end of the resistor, and the other end of the second common mode capacitor is connected with the fourth end of the second common mode inductor and the other end of the resistor.
In an embodiment of the present invention, the first power line has a protection unit thereon.
The second aspect of the utility model provides a circuit, the circuit includes rectifier circuit, main circuit and the utility model discloses the first aspect arbitrary item filter circuit, the main circuit passes through filter circuit with rectifier circuit links to each other.
The third aspect of the utility model provides an outer machine system of air conditioner, outer machine system of air conditioner includes the utility model discloses the arbitrary item of first aspect filter circuit.
As described above, the utility model discloses outer quick-witted system of filter circuit, circuit and air conditioner have following beneficial effect according to one or more embodiments:
the filter circuit includes a first power line; a second power transmission line; at least one first filter element, a first end of each of the first filter elements being connected to the first power line; at least one second filter element, a first end of each of the second filter elements being connected to the second power line; the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state. When the relay is in the off state, the first filter element and the second filter element are cut out from the filter circuit equivalently, namely, the first filter element and the second filter element do not generate leakage current, so that the filter circuit can effectively control the magnitude of the leakage current through the state of the relay, and the safety of the filter circuit can be improved.
In addition, when the number of the first filter elements is three and the number of the second filter elements is three, the filter circuit can be switched between eight switching states by configuring the on-off state of each relay. Under different working frequencies, the switch state which is most matched with the current working frequency can be selected, so that the filter circuit can realize the best filtering effect.
Drawings
Fig. 1 is a schematic circuit diagram of the filter circuit according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of the filter circuit according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of the filter circuit according to an embodiment of the present invention.
Fig. 4 is a partial schematic view of a relay according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of the filter circuit according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of the circuit according to an embodiment of the present invention.
Description of the element reference
1. Filter circuit
11. First power transmission line
12. Second power transmission line
13. First capacitor
a1 First terminal of first capacitor
a2 Second terminal of the first capacitor
14. Second capacitor
b1 First terminal of the second capacitor
b2 Second terminal of the second capacitor
15. Third capacitance
16. Fourth capacitor
17. Fifth capacitor
18. Sixth capacitor
19. First relay
c1 First end of the first relay
c2 Second terminal of the first relay
c3 Third terminal of the first relay
c4 Fourth terminal of first relay
20. Second relay
21. Third relay
22. First pressure sensitive element
23. Second pressure sensitive element
24. Discharge tube
25. First common mode inductor
26. Second common mode inductor
27. Differential mode filtering unit
271. Third pressure sensitive element
272. First differential mode capacitor
273. Second differential mode capacitor
274. Resistance (RC)
28. Protection unit
29. A first voltage source
30. First input signal
31. Second voltage source
32. Second input signal
33. Third voltage source
34. Third input signal
35. Ground wire
300. Circuit arrangement
2. Rectifying circuit
3. Main circuit
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The conventional filter circuit often involves handling overvoltage, and the conventional filter circuit generally has a problem that leakage current generated inside the filter circuit is directly grounded, so that the leakage current flows greatly, and the conventional filter circuit has a problem of low safety and the like. At least in view of this problem, the present invention provides a filter circuit comprising a first power line; a second power transmission line; at least one first filter element, a first end of each of the first filter elements being connected to the first power line; at least one second filter element, a first end of each of the second filter elements being connected to the second power line; the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state. When the relay is in the off state, the first filter element and the second filter element are cut out from the filter circuit equivalently, namely, the first filter element and the second filter element do not generate leakage current, so that the filter circuit can effectively control the magnitude of the leakage current through the state of the relay, and the safety of the filter circuit can be improved.
In addition, when the number of the first filter elements is three and the number of the second filter elements is three, the filter circuit may have eight switching states according to the state of the relay. Under different working frequencies, the switch state which is most matched with the current working frequency can be selected, so that the filter circuit can realize the best filtering effect.
In an embodiment of the present invention, referring to fig. 1 and fig. 2, the filter circuit 1 includes a first power line 11, a second power line 12,3 first filter elements are respectively a first capacitor 13, a third capacitor 15, and a fifth capacitor 17,3 second filter elements are respectively a second capacitor 14, a fourth capacitor 16, and a sixth capacitor 18, and 3 relays are respectively a first relay 19, a second relay 20, and a third relay 21.
Taking the first capacitor 13, the second capacitor 14 and the first relay 19 as an example, the first terminal a1 of the first capacitor 13 is connected to the first power line 11, the first terminal b1 of the second capacitor 14 is connected to the second power line 12, the second terminal a2 of the first capacitor 13, the second terminal b2 of the second capacitor 14 and the first terminal c1 of the first relay 19 are connected, and the second terminal c2 of the first relay is grounded. When the first relay 19 is in a closed state, the second terminal a2 of the first capacitor 13 and the second terminal b2 of the second capacitor 14 are grounded through the first relay 19. When the first relay 19 is in the off state, the first capacitor 13 and the second capacitor 14 do not generate a leakage current. It is understood that the rest of the third capacitor 15, the fourth capacitor 16, the fifth capacitor 17, the sixth capacitor 18, the second relay 20 and the third relay 21 in the filter circuit 1 may be connected in the same or similar manner, and will not be described in detail herein.
It should be noted that, in the present embodiment, the number of the first filter element, the second filter element and the relay is 3, but the present invention is not limited thereto.
Optionally, the first power line 11 has a protection unit 28 thereon. Wherein the protection unit 28 may be a fuse.
Optionally, the filter circuit 1 further includes a first common-mode inductor 25 and a second common-mode inductor 26, a first end of the first common-mode inductor 25 is connected to the first power line 11, a second end of the first common-mode inductor 25 is connected to the second power line 12, a first end of the second common-mode inductor 26 is connected to a third end of the first common-mode inductor 25, a second end of the second common-mode inductor 26 is connected to a fourth end of the first common-mode inductor 25, a third end of the second common-mode inductor 26 is connected to the first power line 11, and a fourth end of the second common-mode inductor 26 is connected to the second power line 12.
Optionally, referring to fig. 3, fig. 3 is a circuit schematic diagram of the filter circuit according to the embodiment. The filter circuit 1 further comprises a first voltage dependent element 22, a second voltage dependent element 23 and a discharge tube 24, one end of the first voltage dependent element 22 is connected to the first power line 11, one end of the second voltage dependent element 23 is connected to the second power line 12, one end of the discharge tube 24 is connected to the other end of the first voltage dependent element 22 and the other end of the second voltage dependent element 23, and the other end of the discharge tube 24 is grounded.
Alternatively, the first power line 11 may be a live line and the second power line 12 may be a neutral line. Since the first relay 19, the second relay 20, and the third relay 21 each have the closed state and the open state, each of the relays can provide eight switching states to the filter circuit 1. The filter circuit 1 can be divided into 4 working states according to the operating frequency, and be working state 1, working state 2, working state 3 and working state 4 respectively, when the operating frequency is less than 30 hertz, the working state of filter circuit 1 is working state 1, when the operating frequency is not less than 30 hertz and the operating frequency is less than 60 hertz, the working state of filter circuit 1 is working state 2, when the operating frequency is not less than 60 hertz and the operating frequency is less than 90 hertz, the working state of filter circuit 1 is working state 3, when the operating frequency is not less than 90 hertz, the working state of filter circuit 1 is working state 4. Because the filter circuit 1 has eight switching states, the filter circuit 1 can flexibly select the switching state which is most matched with the current working state under different working states. The switch state of the filter circuit 1 may be the most matched switch state with the operating state, where in a specific operating state of the filter circuit 1, one of the switch states of the filter circuit 1 may enable the filter effect of the filter circuit 1 to be the best, and then the switch state is the most matched switch state with the specific operating state. The filtering effect may be related to the conduction test result and the radiation test result of the filter circuit 1, and the optimal filtering effect may be flexibly selected according to the actual application scenario, which is not limited explicitly in this embodiment. In addition, the second end of each relay may be grounded, and the second end of each relay may be connected to a ground line 35.
Optionally, referring to fig. 4, fig. 4 is a partial schematic diagram of the relay according to the embodiment. Taking the first relay 19 as an example, the first relay 19 further has a third terminal c3 and a fourth terminal c4, the third terminal c3 of the first relay 19 is connected to the first voltage source 29, and the fourth terminal c4 of the first relay 19 is connected to the first input signal 30. The first input signal 30 may be used to place the first relay 19 in the closed state or open state. Similarly to the first relay 19, the third terminal c3 of the second relay 20 is connected to a second voltage source 31, and the fourth terminal c4 of the second relay 20 is connected to a second input signal 32. The third terminal c3 of the third relay 21 is connected to a third voltage source 33, and the fourth terminal c4 of the third relay 21 is connected to a third input signal 34. The second input signal 32 may be used to place the second relay 20 in the closed state or the open state, and the third input signal 34 may be used to place the third relay 21 in the closed state or the open state. The first input signal 30, the second input signal 32, and the third input signal 34 may be three control signals output by one DSP end, or may also be control signals output by three DSP ends, which is not limited in this embodiment explicitly.
Optionally, referring to fig. 5, the filter circuit 1 further includes a differential mode filter unit 27, where the differential mode filter unit 27 is configured to suppress an overvoltage in the filter circuit 1. The differential-mode filtering unit 27 includes: a third voltage-sensitive element 271, a first differential-mode capacitor 272, a second differential-mode capacitor 273, and a resistor 274, wherein one end of the third voltage-sensitive element 271 is connected to the first power line 11, the other end of the third voltage-sensitive element 271 is connected to the second power line 12, one end of the first differential-mode capacitor 272 is connected to one end of the third voltage-sensitive element 271 and the first end of the first common-mode inductor 25, the other end of the first differential-mode capacitor 272 is connected to the other end of the third voltage-sensitive element 271 and the second end of the first common-mode inductor 25, one end of the second differential-mode capacitor 273 is connected to the third end of the second common-mode inductor 26 and one end of the resistor 274, and the other end of the second differential-mode capacitor 273 is connected to the fourth end of the second common-mode inductor and the other end of the resistor. In addition, the connection between the circuit elements in the filter circuit 1 refers to the connection of the circuit elements in the filter circuit 1 by the first power line 11 or the second power line 12, for example, one end of the third pressure-sensitive element 271 is connected to the first power line 11, the circuit elements connected to the end of the third pressure-sensitive element 271 are connected to the third pressure-sensitive element 271 by the first power line 11, the other end of the third pressure-sensitive element 271 is connected to the second power line 12, the circuit elements connected to the end of the third pressure-sensitive element 271 are connected to the third pressure-sensitive element 271 by the second power line 12, the electrical connection between the circuit elements is similar to the connection between the circuits, and the description thereof is omitted.
As is clear from the above description, the filtering circuit 1 comprises a first power line 11; a second transmission line 12; three first filter elements, each of the first filter elements having a first end and a second end, the first end of each of the first filter elements being connected to the first power line 11; three second filter elements, each having a first end and a second end, the first end of each second filter element being connected to the second power line 12; the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state. When the relay is in the off state, the first filter element and the second filter element are cut out from the filter circuit equivalently, namely, the first filter element and the second filter element do not generate leakage current, so that the filter circuit can effectively control the magnitude of the leakage current through the state of the relay, and the safety of the filter circuit can be improved.
In addition, eight switch states can be provided for the filter circuit according to the state of the relay. At different operating frequencies, the switch state that best matches the current operating frequency may be selected, so that the filter circuit 1 achieves the best filtering effect.
A second aspect of the present invention provides a circuit. In an embodiment of the present invention, please refer to fig. 6, and fig. 6 is a schematic structural diagram of the circuit in this embodiment. The circuit comprises a rectifying circuit 2, a main circuit 3 and a filter circuit 1 shown in figure 1, wherein the main circuit 3 is connected with the rectifying circuit 2 through the filter circuit 1. In specific application, the main circuit 3 is electrically connected with the rectifying circuit 2 through the filter circuit 1 so as to reduce the leakage current of the circuit.
The utility model provides an outer machine system of air conditioner. In an embodiment of the present invention, the air conditioner external unit system includes the filter circuit 1 shown in fig. 1. In specific application, the filter circuit 1 is arranged in the air conditioner external unit system to reduce leakage current generated by the air conditioner external unit system.
To sum up, the utility model discloses one or more embodiments filter circuit can reduce the leakage current, consequently the utility model discloses all kinds of shortcomings in the prior art have effectively been overcome and high industry value is possessed.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A filter circuit, comprising:
a first power transmission line;
a second power transmission line;
at least one first filter element, a first end of each of the first filter elements being connected to the first power line;
at least one second filter element, a first end of each of the second filter elements being connected to the second power line;
the first end of each relay is electrically connected with the second end of one first filter element and the second end of one second filter element, the second end of each relay is grounded, the first end and the second end of each relay are electrically connected when the relays are in a closed state, and the first end and the second end of each relay are mutually disconnected when the relays are in an open state.
2. The filter circuit of claim 1, wherein the first filter element is a first common-mode capacitor and the second filter element is a second common-mode capacitor.
3. The filter circuit of claim 2, wherein the first common-mode capacitors are three in number and the second common-mode capacitors are three in number.
4. The filter circuit according to claim 3, further comprising a first voltage-sensitive element, a second voltage-sensitive element, and a discharge tube, wherein one end of the first voltage-sensitive element is connected to the first power line, one end of the second voltage-sensitive element is connected to the second power line, one end of the discharge tube is connected to the other end of the first voltage-sensitive element and the other end of the second voltage-sensitive element, and the other end of the discharge tube is grounded.
5. The filter circuit of claim 4, further comprising a first common-mode inductor and a second common-mode inductor, wherein a first terminal of the first common-mode inductor is coupled to the first power line, a second terminal of the first common-mode inductor is coupled to the second power line, a first terminal of the second common-mode inductor is coupled to a third terminal of the first common-mode inductor, a second terminal of the second common-mode inductor is coupled to a fourth terminal of the first common-mode inductor, a third terminal of the second common-mode inductor is coupled to the first power line, and a fourth terminal of the second common-mode inductor is coupled to the second power line.
6. The filter circuit of claim 5, further comprising a differential mode filtering unit to suppress overvoltage in the filter circuit.
7. The filter circuit of claim 6, wherein the differential mode filter unit further comprises: the power supply comprises a third voltage-sensitive element, a first differential mode capacitor, a second differential mode capacitor and a resistor, wherein one end of the third voltage-sensitive element is connected with the first power transmission line, the other end of the third voltage-sensitive element is connected with the second power transmission line, one end of the first differential mode capacitor is connected with one end of the third voltage-sensitive element and the first end of the first common mode inductor, the other end of the first differential mode capacitor is connected with the other end of the third voltage-sensitive element and the second end of the first common mode inductor, one end of the second differential mode capacitor is connected with the third end of the second common mode inductor and one end of the resistor, and the other end of the second differential mode capacitor is connected with the fourth end of the second common mode inductor and the other end of the resistor.
8. The filter circuit of claim 7, wherein the first power line has a protection unit thereon.
9. An electrical circuit comprising a rectifying circuit, a main circuit and a filter circuit as claimed in any one of claims 1 to 8, the main circuit being connected to the rectifying circuit via the filter circuit.
10. An outdoor unit system for an air conditioner, comprising the filter circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222129606.8U CN218005870U (en) | 2022-08-12 | 2022-08-12 | Filter circuit, circuit and air conditioner external unit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222129606.8U CN218005870U (en) | 2022-08-12 | 2022-08-12 | Filter circuit, circuit and air conditioner external unit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218005870U true CN218005870U (en) | 2022-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222129606.8U Active CN218005870U (en) | 2022-08-12 | 2022-08-12 | Filter circuit, circuit and air conditioner external unit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218005870U (en) |
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2022
- 2022-08-12 CN CN202222129606.8U patent/CN218005870U/en active Active
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