CN2859926Y - Switch power circuit for air-condition - Google Patents
Switch power circuit for air-condition Download PDFInfo
- Publication number
- CN2859926Y CN2859926Y CN 200520126546 CN200520126546U CN2859926Y CN 2859926 Y CN2859926 Y CN 2859926Y CN 200520126546 CN200520126546 CN 200520126546 CN 200520126546 U CN200520126546 U CN 200520126546U CN 2859926 Y CN2859926 Y CN 2859926Y
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- circuit
- switching power
- power source
- transformer
- source chip
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Abstract
The utility model discloses a switch power circuit for an air-condition, the circuit includes a rectifier circuit, a filter circuit, a switch power chip and a transformer, the rectifier circuit is connected with an input end of the switch power chip via the filter circuit, and an output end of the switch power chip is connected with an end of a primary coil of the transformer, the other end of the primary coil is connected to a control end of the switch power chip via a resistor, a capacitor is connected between the output end and the control end of the switch power chip, a secondary coil of the transformer supplies work power for a subsequent circuit board after outputting a low-voltage DC. The utility model replaces a conventional linear power circuit by adopting Link Switch series switch power chips produced by PI company, that effectively simplifies circuit structure, reduces volume of a PCB, decreases the power loss of air-condition products and increases the whole performance.
Description
Technical field
The utility model relates to a kind of improvement of air conditioner electric-control system, specifically, relates to a kind of improvement to switching power circuit in the air-condition circuits.
Background technology
At present, in the electric-control system of existing air conditioner, its power circuit generally all be adopt linear transformer simple in structure, with low cost realize voltage from high level to low level conversion.This linear transformer is because its volume is big, and it is big to take the pcb board area, and easily produces electromagnetic interference in the course of the work, therefore, the complete machine performance of air-conditioning product has been brought adverse influence.In order to improve the complete machine performance of air conditioner, in existing some air-conditioning product, all used switching power source chip to finish the conversion of voltage.Employed switching power source chip is low owing to its integrated level in the electric-control system at present, function is simple, therefore, need the comparatively complicated peripheral circuit of configuration to assist realization, thereby caused problems such as the power circuit volume is big, cost is high, power consumption is serious, be unfavorable for improving the air-conditioning competition capability.
Summary of the invention
The utility model is in order to solve problems such as the power circuit volume is big in the prior art, cost is high, power consumption is serious, a kind of novel switching power circuit that is used for air conditioner is provided, be applied in the power circuit of air conditioner by the LinkSwitch series switch power supply chip that PI company is produced, effectively simplify circuit structure, reduced the area occupied of pcb board, improved the antijamming capability of power circuit, improved the complete machine performance of air-conditioning product, for the power system design of air conditioner provides a kind of effective implementation.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of switching power circuit that is used for air conditioner, comprise rectification circuit, filter circuit, switching power source chip and transformer, described rectification circuit connects the input of switching power source chip through filter circuit, the output of switching power source chip links to each other with an end of transformer, the other end of described transformer connects the control end of switching power source chip through resistance, be connected with an electric capacity between the output of described switching power source chip and control end, the secondary coil output low-voltage DC of transformer provides working power for the subsequent conditioning circuit plate.
As the further qualification to technique scheme, the other end of described transformer is connected the control end of described switching power source chip through a protection filter circuit of being made up of resistance, diode and electric capacity; Wherein, the primary coil of transformer connects the positive pole of described diode through resistance, and the negative pole of diode connects the control end of described switching power source chip on the one hand through resistance, connects the output of switching power source chip on the other hand through described electric capacity.The secondary coil of described transformer connects by two electric capacity and the π type filter circuit that inductance is formed through switching diode, and then to follow-up circuit board output low-voltage DC.
As the further qualification again to technique scheme, described rectification circuit is the bridge rectifier of being made up of four diodes, and its output connects described filter circuit; Described filter circuit adopts two electric capacity and the π type filter network realization that inductance is formed.
As the further qualification again to technique scheme, the LinkSwitch series switch power supply chip that described switching power source chip adopts PI company to produce realizes that the model of the switching power source chip that adopts in the utility model is LNK500.
Compared with prior art, advantage of the present utility model and good effect are: the utility model replaces traditional linear power supply circuit by the LinkSwitch series switch power supply chip that adopts PI company to produce, not only effectively simplified circuit structure, reduced the volume of pcb board, reduced cost, and reduced the power loss of air-conditioning product, improved its complete machine performance.
Description of drawings
Fig. 1 is a switching power circuit schematic diagram of the present utility model.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
LinkSwitch series switch power supply chip is that PI company is challenge original structure linear adaptation device simple, with low cost, a kind of revolutionary topological structure design of releasing in the research of low-power consumption Switching Power Supply.Compare with traditional " fragment of brick " type Switching Power Supply, LinkSwitch series switch power supply chip has that volume is little, in light weight, packaged, 75% efficient and less than the characteristics such as non-loaded power consumption of 300mW.LinkSwitch series switch power supply chip is integrated in the MOSFET of 700V pipe, PWM control, high voltage startup, overcurrent and overheating protection circuit on the chip; its input D links to each other with the drain electrode of power supply MOSFET pipe; provide inner starting current, the limiting value reflection drain current of internal current.Control end C is that error is amplified and the feedback current input pin, is used for controlling the duty ratio of its output voltage and the size of electric current.When normal operation, the internal shunt adjuster provides the internal blas electric current.Simultaneously, control end C also is bypass, restarts the pin that is connected with building-out capacitor automatically.Output S is the high pressure output pin of MOSFET pipe, the common reference point of former limit control circuit.Fig. 1 is the catenation principle figure of described LinkSwitch series switch power supply chip in power circuit, and the selection of each component parameters can specifically be determined according to the design needs among the figure.
Among Fig. 1, after the bridge rectifier that the alternating current 220V civil power is formed via diode D01～D04 is rectified into high voltage direct current, after the π type filter circuit filtering by capacitor C 40, C36 and inductance L 1 composition, outputing to model is the input D of the switching power source chip N1 of LNK500.The output S of described switching power source chip N1 connects 1 end of transformer T1 primary coil, 2 ends of its primary coil connect the positive pole of diode D5 through resistance R 2, the negative pole of described diode D5 connects the control end C of switching power source chip N1 on the one hand through resistance R 8, connect the output S of described switching power source chip N1 on the other hand through capacitor C 34.Between the output S of described switching power source chip N1 and control end C, also be connected with a charge and discharge capacitance C39.The secondary coil of described transformer T1 connects the π type filter circuit of being made up of capacitor C 4, C30 and inductance L 3 through switching diode D12, to transformer T1 output+the 12V dc low-voltage carries out outputing in the follow-up circuit board after the Filtering Processing, for late-class circuit provides stable working power.
When the former level work of transformer T1, secondary shutoff, electric current affacts the control end C of switching power source chip N1 through primary coil, resistance R 2, diode D5, resistance R 8, difference according to the input current size, control the voltage signal that its output S output has different duty, the switching frequency of control transformer T1.When the simple shutoff of transformer T1, secondary work, 2 ends of transformer T1 primary coil produce induced voltage, feed back to the control end C of switching power source chip N1, with the duty ratio of this by-pass cock power supply chip N1 output voltage, thereby guarantee the stability that its secondary voltage is exported.
Air conditioner power circuit of the present utility model adopts LNK500 switching power source chip N1 to replace traditional linear adaptation device, not only effectively simplified circuit structure, reduced taking up room of pcb board, and reduced cost, improved the reliability of complete machine, can be widely used in having higher practical application meaning in the air conditioner electric-control system of various models.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 (6)
1. switching power circuit that is used for air conditioner, comprise rectification circuit, filter circuit, switching power source chip (N1) and transformer (T1), it is characterized in that: described rectification circuit connects the input (D) of switching power source chip (N1) through filter circuit, the output (S) of switching power source chip (N1) links to each other with an end of transformer (T1) primary coil, the other end of described transformer (T1) primary coil connects the control end (C) of switching power source chip (N1) through resistance (R8), be connected with an electric capacity (C39) between the output (S) of described switching power source chip (N1) and control end (C), the secondary coil output low-voltage DC of transformer (T1) provides working power for the subsequent conditioning circuit plate.
2. the switching power circuit that is used for air conditioner according to claim 1 is characterized in that: described switching power source chip (N1) adopts the LinkSwitch series switch power supply chip of PI company to realize.
3. the switching power circuit that is used for air conditioner according to claim 2 is characterized in that: the other end of described transformer (T1) primary coil is connected the control end (C) of described switching power source chip (N1) through a protection filter circuit of being made up of resistance (R2), diode (D5) and electric capacity (C34); Wherein, the primary coil of transformer (T1) connects the positive pole of described diode (D5) through resistance (R2), the negative pole of diode (D5) connects the control end (C) of described switching power source chip (N1) on the one hand through resistance (R8), connect the output (S) of switching power source chip (N1) on the other hand through described electric capacity (C34).
4. the switching power circuit that is used for air conditioner according to claim 3 is characterized in that: described rectification circuit for by four diodes (bridge rectifier of D01～D04) form, its output connects described filter circuit; The π type filter network that described filter circuit adopts two electric capacity (C40, C36) and an inductance (L1) to form is realized.
5. according to claim 3 or the 4 described switching power circuits that are used for air conditioner, it is characterized in that: the secondary coil of described transformer (T1) connects the π type filter circuit of being made up of two electric capacity (C4, C30) and an inductance (L3) through switching diode (D12), and then to follow-up circuit board output low-voltage DC.
6. the switching power circuit that is used for air conditioner according to claim 5 is characterized in that: the model of described switching power source chip (N1) is LNK500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126546 CN2859926Y (en) | 2005-12-26 | 2005-12-26 | Switch power circuit for air-condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126546 CN2859926Y (en) | 2005-12-26 | 2005-12-26 | Switch power circuit for air-condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859926Y true CN2859926Y (en) | 2007-01-17 |
Family
ID=37612783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520126546 Expired - Fee Related CN2859926Y (en) | 2005-12-26 | 2005-12-26 | Switch power circuit for air-condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859926Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160523A (en) * | 2016-07-14 | 2016-11-23 | 成都市思卡利科技有限公司 | A kind of regulated power supply method of supplying power to using pi type filter to be filtered |
-
2005
- 2005-12-26 CN CN 200520126546 patent/CN2859926Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160523A (en) * | 2016-07-14 | 2016-11-23 | 成都市思卡利科技有限公司 | A kind of regulated power supply method of supplying power to using pi type filter to be filtered |
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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: 20080418 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080418 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: 20121226 |