CN2847643Y - Filter circuit for suppressing electromagnetic interference for 2P frequency variable air conditioner - Google Patents
Filter circuit for suppressing electromagnetic interference for 2P frequency variable air conditioner Download PDFInfo
- Publication number
- CN2847643Y CN2847643Y CN 200520126560 CN200520126560U CN2847643Y CN 2847643 Y CN2847643 Y CN 2847643Y CN 200520126560 CN200520126560 CN 200520126560 CN 200520126560 U CN200520126560 U CN 200520126560U CN 2847643 Y CN2847643 Y CN 2847643Y
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- electromagnetic interference
- air conditioner
- filter circuit
- zero line
- power
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Abstract
The utility model discloses a filter circuit for suppressing electromagnetic interference for a 2P frequency variable air conditioner, which has the structure that a capacitor is connected between a fire wire and a zero line at the input end of an alternating current power supply, and through the capacitor, the fire wire and the zero line are connected with the output end of the alternating current power supply through a common mode inductor; the fire wire and the zero line are respectively grounded through a filter capacitor at the output end of the alternating current power supply. Through connecting a first level filter circuit composed of the capacitor and the common mode inductor at the input end of the alternating current power supply of an air conditioner and reasonably choosing the parameter value of each component, the utility model then realizes the effectively suppression of electromagnetic interference in a power supply circuit of the air conditioner, avoids the misoperation of equipment, increases the operational reliability of the air conditioner and has good suppression effect of an existing 2P frequency variable air conditioner.
Description
Technical field
The utility model relates to a kind of improvement of air-condition circuits, specifically, relates to a kind of being applied to and in the air-condition circuits electromagnetic interference EMI is played inhibiting filter circuit.
Background technology
More or less all can have electromagnetic interference EMI to a certain degree in existing air-condition circuits, these electromagnetic interference produce by electrode a bit, and some produces when electronic switch moves.And,, cause the intensity of electromagnetic interference more serious because bigger frequency converter has all been adopted in its inside for the convertible frequency air-conditioner of extensively promoting in the market.The electromagnetic interference that seals in the circuit not only can reduce the service behaviour of complete machine, but also causes the misoperation of equipment through regular meeting, also can cause the generation of peril when serious, works the mischief for people's the security of the lives and property.Therefore, how to suppress this electromagnetic interference and become one of subject matter that present many air conditioning system makers need to be resolved hurrily.
Summary of the invention
Thereby the utility model causes complete machine performance to reduce, easily cause the problem of equipment malfunction work owing to introduce electromagnetic interference in order to solve in the prior art in the air-condition circuits, the filter circuit of a kind of novel inhibition electromagnetic interference EMI is provided, by adopting simple circuit configuration, effectively suppressed the influence of electromagnetic interference to the air-conditioning power circuit, by selecting rational component parameter, solved the inhibition problem of present 2 convertible frequency air-conditioners well to electromagnetic interference.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of 2 convertible frequency air-conditioners at the input of AC power, are connected with an electric capacity with the filter circuit that suppresses electromagnetic interference between live wire and the zero line, through described electric capacity, live wire and zero line are connected the output of AC power through a common mode inductance; At the output of described AC power, live wire and zero line are respectively through a filter capacitor ground connection.
As the further qualification to technique scheme, the input of described AC power connects outside 220V electric main.The parameter of described common mode inductance is 1.8mH, and the live wire and the capacitance parameter between the zero line that are connected ac power input end are 1uF, and the capacitance parameter that is connected ac power output is 3300pF.
Compared with prior art, advantage of the present utility model with good effect is: the utility model is by being connected the one-level filter circuit of being made up of electric capacity and common mode inductance on the input of air-conditioning AC power, and the parameter value to each components and parts is reasonably selected, and then realized effective inhibition to electromagnetic interference in the air-conditioning power circuit, the generation of having avoided equipment malfunction to do, improved the reliability of operation of air conditioner, 2 present transducer air conditionings have been had good electromagnetic interference inhibitory action.
Description of drawings
Fig. 1 is the filter circuit schematic diagram that suppresses EMI in the utility model;
Fig. 2 is the parameter value table of each components and parts among Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
The utility model is at the characteristic of 2 transducer air conditionings that occur in the market, filter circuit has as shown in Figure 1 been proposed, described filter circuit is arranged on the input of air-conditioning AC power, and the electromagnetic interference EMI in the power circuit has been played the good restraining effect.
Among Fig. 1, be connected with a capacitor C 10 between the live wire end L of alternating current 220V civil power and the zero line side N, through described capacitor C 10, live wire L and zero line N are connected output L ', the N ' of AC power through common mode inductance L10.Output L ', the N ' of described AC power is respectively through a filter capacitor C12, C11 ground connection.
Give full play to the inhibitory action of its electromagnetic interference in order to make above-mentioned filter circuit, need select accurately the parameter of each components and parts in the filter circuit, experiment, comparison through repeated multiple times the utility model proposes component parameter value table as shown in Figure 2.Wherein, the parameter value of common mode inductance L10 is 1.8mH, and the appearance value of capacitor C 10 is 1uF, and the appearance value of capacitor C 11, C12 is 3300pF.
The utility model has been realized effective inhibition to electromagnetic interference in the air-conditioning power circuit by adopting above-mentioned simple circuit configuration, has improved the complete machine performance of air-conditioning equipment, is adapted at promoting the use of in 2 transducer air conditionings.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (3)
1. 2 convertible frequency air-conditioners are with the filter circuit that suppresses electromagnetic interference, it is characterized in that: at the input of AC power, be connected with an electric capacity (C10) between live wire (L) and the zero line (N), through described electric capacity (C10), live wire (L) and zero line (N) are connected the output (L ', N ') of AC power through a common mode inductance (L10), at the output of described AC power, live wire (L ') and zero line (N ') respectively through a filter capacitor (C12 or C11) ground connection.
2. 2 convertible frequency air-conditioners filter circuit that suppresses electromagnetic interference according to claim 1, it is characterized in that: the input of described AC power connects outside 220V electric main.
3. 2 convertible frequency air-conditioners filter circuit that suppresses electromagnetic interference according to claim 1 and 2, it is characterized in that: the parameter of described common mode inductance (L10) is 1.8mH, be connected the live wire (L) of ac power input end and electric capacity (C10) the appearance value between the zero line (N) is 1uF, electric capacity (C11, C12) the appearance value that is connected ac power output is 3300pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126560 CN2847643Y (en) | 2005-12-24 | 2005-12-24 | Filter circuit for suppressing electromagnetic interference for 2P frequency variable air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126560 CN2847643Y (en) | 2005-12-24 | 2005-12-24 | Filter circuit for suppressing electromagnetic interference for 2P frequency variable air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2847643Y true CN2847643Y (en) | 2006-12-13 |
Family
ID=37513065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520126560 Expired - Fee Related CN2847643Y (en) | 2005-12-24 | 2005-12-24 | Filter circuit for suppressing electromagnetic interference for 2P frequency variable air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2847643Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075637A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | EMC filter circuit, electromagnetic heating Household appliance control circuit and household electrical appliance |
-
2005
- 2005-12-24 CN CN 200520126560 patent/CN2847643Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075637A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | EMC filter circuit, electromagnetic heating Household appliance control circuit and household electrical appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: QINGDAO HISENSE AIR CONDITIONING CO. Free format text: FORMER OWNER: HAIXIN GROUP CO., LTD.; PATENTEE Effective date: 20071012 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071012 Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Haisense Air Conditioner Co., Ltd., Qingdao Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Co-patentee before: Haisense Air Conditioner Co., Ltd., Qingdao Patentee before: Hisense Group Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: HISENSE( SHANDONG ) AIR CONDITIONING CO., LTD. Free format text: FORMER OWNER: QINGDAO HISENSE AIR CONDITIONING CO. Effective date: 20080425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080425 Address after: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Patentee after: Hisense (Shandong) Air-Conditioning Co., Ltd. Address before: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Patentee before: Haisense Air Conditioner Co., Ltd., Qingdao |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061213 Termination date: 20121224 |