CN2859923Y - Triple harmonic current restraining circuit for frequency-changing indoor air-condition - Google Patents
Triple harmonic current restraining circuit for frequency-changing indoor air-condition Download PDFInfo
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- CN2859923Y CN2859923Y CN 200520126561 CN200520126561U CN2859923Y CN 2859923 Y CN2859923 Y CN 2859923Y CN 200520126561 CN200520126561 CN 200520126561 CN 200520126561 U CN200520126561 U CN 200520126561U CN 2859923 Y CN2859923 Y CN 2859923Y
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- circuit
- harmonic current
- condition
- triple harmonic
- indoor air
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Abstract
The utility model discloses a triple harmonic current restraining circuit for frequency-changing indoor air-condition, including a AC power input end, a commutate circuit, a filtering circuit and a three-phase contravariance circuit, also a two-circuit inductance element having a main loop in series in the AC power loop, and a secondary loop in parallel with the capacitance element. The utility model effectively restrain the triple harmonic current generated in the commutate contravariance process for the indoor air-condition, by adopting the simple circuit structure, to make the air-condition satisfy the requirement of the air-condition harmonic current in Chinese standard. The current restraining circuit of the utility model has reasonable structure, reliable theory, and also can effectively optimize the electrified wire quality, save the electric energy in a low cost, which totally solves the harmonic problem for frequency-changing indoor air-condition, and has notable restraining effect when applied in the frequency-changing indoor air-condition with different sizes.
Description
Technical field
The utility model belongs to air-conditioning and Refrigeration Engineering technical field, specifically, relates to a kind of frequency conversion type room air conditioner and suppresses circuit with triple harmonic current, is used to solve the problem that exceeds standard of frequency conversion type room air conditioner harmonic current.
Background technology
At present, in existing frequency conversion type air conditioner electric-control system, owing to have rectification inverter circuit, so the problem that 3 subharmonic currents exceed standard appears in regular meeting.Harmonic current exceeds standard not only can influence power grid quality, and energy loss is serious, is unfavorable for the designing requirement of energy-conservationization of home appliance.In order to ensure the quality of national grid, China stipulates the limit value of air conditioner harmonic current by GB GB17625.1-2003.In order to make air-conditioner device satisfy the GB regulation, most of air conditioning system maker has all set up harmonic current and has suppressed circuit in the air conditioner electric-control system, the general complex structure of these circuit, and cost is higher, is unsuitable for extensively promoting the use of in air-conditioning equipment.
Summary of the invention
The utility model in order to solve frequency conversion type room air conditioner in the prior art since the triple harmonic current that produces in the commutation inversion process easily exceed standard, the problem that the national grid quality is impacted, provide a kind of novel frequency conversion type room air conditioner to suppress circuit with triple harmonic current, by in the AC power major loop, setting up simple inhibition circuit, efficiently solve the problem that triple harmonic current exceeds standard, guarantee power grid quality, saved electric energy.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of frequency conversion type room air conditioner suppresses circuit with triple harmonic current, comprise ac power input end, rectification circuit, filter circuit and three-phase inverting circuit, in described current suppressing circuit, also include a pair of loop inductance element, the major loop of described double loop inductance element is connected in the ac power supply circuit, and the minor loop of double loop inductance element is in parallel with capacity cell.
As further qualification to technique scheme, the major loop of described double loop inductance element is connected in the live wire of AC power or in the zero line, the voltage of described AC power is 220V, after the bridge rectifier of forming via four diodes converts direct current to, the filter circuit of forming by inductance and electric capacity is connected described three-phase inverting circuit, and then becomes three-phase alternating current to drive the three phase alternating current motor running dc inverter.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by the major loop of series connection a pair of loop inductance element in the major loop of AC power, and then by its minor loop capacity cell in parallel, effectively suppressed the frequency conversion type room air conditioner because the triple harmonic current that produces in the commutation inversion process with simple circuit configuration, made air conditioner satisfy in the GB requirement about air conditioner harmonic current limit value.Current suppressing circuit of the present utility model is rational in infrastructure, principle is reliable, can effectively optimize power grid quality, save electric energy, with lower cost, fundamentally solved the harmonic problem of frequency conversion type room air conditioner, can be widely used in having significant inhibition effect in the frequency conversion type air conditioner electric-control system of all models.
Description of drawings
Fig. 1 is the schematic diagram that triple harmonic current suppresses circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Among Fig. 1, be in series with the major loop of a pair of loop inductance element L1 on the live wire L of alternating current 220V power supply, the minor loop of described double loop inductance component L 1 is in parallel with capacity cell C1.The live wire L of AC power connects the bridge rectifier of being made up of four diode D1～D4 through the major loop of described inductance component L 1, become direct current through AC rectification and behind the ripple, connect the three-phase alternating current blower fan through inverter circuit 1 after the filter circuit filtering interfering of inductance L 2, capacitor C 2 compositions is made an uproar.Described inverter circuit 1 is formed by connecting by six switch MOS pipe N1～N6, high voltage direct current is reverse into three-phase alternating current drives the three phase alternating current motor running.
The utility model is connected in the major loop of AC power by the triple-frequency harmonics oscillating circuit with double loop inductance component L 1 and capacity cell C1 composition, and the parameter of inductance component L 1 and capacity cell C1 reasonably selected, thereby efficiently solve the problem that triple harmonic current exceeds standard, make air conditioner satisfy in the GB requirement about air conditioner harmonic current limit value.Certainly, the major loop of described double loop inductance component L 1 also can be connected on the zero line N of AC power, and the sort circuit structure equally also can play the effective inhibitory action to harmonic current.
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 (5)
1. a frequency conversion type room air conditioner suppresses circuit with triple harmonic current, comprise ac power input end, rectification circuit, filter circuit and three-phase inverting circuit, it is characterized in that: in described current suppressing circuit, include a pair of loop inductance element, the major loop of described double loop inductance element is connected in the ac power supply circuit, and the minor loop of double loop inductance element is in parallel with capacity cell.
2. frequency conversion type room air conditioner according to claim 1 suppresses circuit with triple harmonic current, it is characterized in that: the major loop of described double loop inductance element is connected in the live wire of AC power.
3. frequency conversion type room air conditioner according to claim 1 suppresses circuit with triple harmonic current, it is characterized in that: the major loop of described double loop inductance element is connected in the zero line of AC power.
4. suppress circuit according to claim 2 or 3 described frequency conversion type room air conditioners with triple harmonic current, it is characterized in that: the voltage of described AC power is 220V.
5. frequency conversion type room air conditioner according to claim 4 suppresses circuit with triple harmonic current, it is characterized in that: the bridge rectifier of described rectification circuit for forming by four diodes, after the filter circuit filtering of inductance and electric capacity composition, be connected described three-phase inverting circuit, become three-phase alternating current to be electrically connected three phase alternating current motor dc inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126561 CN2859923Y (en) | 2005-12-24 | 2005-12-24 | Triple harmonic current restraining circuit for frequency-changing indoor air-condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126561 CN2859923Y (en) | 2005-12-24 | 2005-12-24 | Triple harmonic current restraining circuit for frequency-changing indoor air-condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859923Y true CN2859923Y (en) | 2007-01-17 |
Family
ID=37612780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520126561 Expired - Fee Related CN2859923Y (en) | 2005-12-24 | 2005-12-24 | Triple harmonic current restraining circuit for frequency-changing indoor air-condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859923Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
-
2005
- 2005-12-24 CN CN 200520126561 patent/CN2859923Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
| CN109915946B (en) * | 2019-03-21 | 2020-12-22 | 广东美的制冷设备有限公司 | Electric control device, outdoor unit and air conditioner |
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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: 20071221 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071221 Address after: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Patentee after: Haisense Air Conditioner Co., Ltd., Qingdao Address before: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Co-patentee before: Haisense Air Conditioner Co., Ltd., Qingdao Patentee before: Hisense Group |
|
| 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: 20070117 Termination date: 20121224 |