CN101577484B - Power supply device of switch power supply of external convertible frequency air conditioner - Google Patents
Power supply device of switch power supply of external convertible frequency air conditioner Download PDFInfo
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- CN101577484B CN101577484B CN2008100818359A CN200810081835A CN101577484B CN 101577484 B CN101577484 B CN 101577484B CN 2008100818359 A CN2008100818359 A CN 2008100818359A CN 200810081835 A CN200810081835 A CN 200810081835A CN 101577484 B CN101577484 B CN 101577484B
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Abstract
The invention discloses a power supply device of a switch power supply of an external convertible frequency air conditioner, which comprises a filter circuit, a first power switching circuit and a second power switching circuit, wherein the filter circuit is used for filtering an input alternating current power supply; the first power switching circuit is used for converting the alternating current power supply after being filtered by the filter circuit into a direct current power supply and supplying the direct current power supply to a switch power supply circuit so as to supply power to theswitch power supply circuit; and the second power switching circuit is used for converting the alternating current power supply after being filtered by the filter circuit into the direct current powe r supply and supplying the direct current power supply to a running circuit of a control compressor so as to supply the power to the running circuit of the control compressor. The invention respectively converts the filtered alternating current power supply into the direct current power supply by the first power switching circuit and the second power switching circuit and respectively supplies theconverted direct current power supply to the switch power supply circuit and the running circuit of the control compressor, thereby isolating the power supply input ends of the switch power supply ci rcuit and the running circuit of the control compressor and improving the power supply input stability of a switch power supply.
Description
Technical field
The present invention relates to air-conditioning and power technique fields, particularly relate to a kind of electric supply installation of switch power supply of external convertible frequency air conditioner.
Background technology
Enhancing along with people's awareness of saving energy, use the air conditioner of DC frequency-changeable compressor and come into huge numbers of families gradually, DC frequency converting air-conditioner more and more is subjected to liking of consumer because of characteristics such as good energy-conservation, accurate temperature controlling, ultralow temperature start, heat fast.The outer machine of DC frequency-changing machine uses control board to realize the function of compressor and various transducers, therefore the reliability of power supply becomes the problem of primary solution on the outer machine control board, guarantee the long-term reliability running of power supply, the quality that improves the air-conditioning product is played important effect.
At present, the method of supplying power to of the Switching Power Supply on the outer machine control board of air conditioner is: the power input of this Switching Power Supply is connected in parallel with the power input of control compressor operation circuit, by directly powering by the 310V DC power supply that generates behind rectifier bridge rectification and the flat ripple of electrochemical capacitor.A kind of electric supply installation of switch power supply of external convertible frequency air conditioner as shown in Figure 1, this device comprises filter circuit and power-switching circuit two parts, AC power is imported power-switching circuit after by filter circuit filtering, is being converted to the 310V DC power supply through power-switching circuit.Wherein, filter circuit is made up of capacitor C 11, C12 and inductance L 11, L12, the two ends of capacitor C 11 are the input of AC power, the two ends of capacitor C 12 are the output of filter circuit, the two ends of inductance L 11 are connected with the end of capacitor C 11 and C12 respectively, and the two ends of inductance L 12 are connected with the other end of capacitor C 11 and C12 respectively; Power-switching circuit is made up of rectifier bridge Z11 and electrochemical capacitor C13, the output of filter circuit is connected to the ac input end of rectifier bridge Z11, the positive pole of the dc output end of rectifier bridge Z11 is connected with the positive pole of electrochemical capacitor C13, the negative pole of the dc output end of rectifier bridge Z11 is connected with the negative pole of electrochemical capacitor C13, wherein the end that the positive pole of two diodes links to each other among the rectifier bridge Z11 is the negative pole of rectifier bridge Z11, and the end that the negative pole of two diodes links to each other among the rectifier bridge Z11 is the positive pole of rectifier bridge Z11; The positive pole of electrochemical capacitor C13 is connected to the positive pole of the power input of Switching Power Supply and control compressor operation circuit, and the negative pole of electrochemical capacitor C13 is connected to the negative pole of the power input of Switching Power Supply and control compressor operation circuit.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: because the power input of Switching Power Supply is connected in parallel with the power input of controlling the compressor operation circuit, so when compressor when high frequency turns round, through the power supply of electrochemical capacitor flat ripple can not be very stable be fixed on 310V, can since the running of compressor the voltage of DC power supply is dragged down; Simultaneously compressor all can produce some assorted pulses and gives to switching power circuit in the startup of moment and electrochemical capacitor charge and discharge process, will inevitably impact to switching power circuit like this.
Summary of the invention
The problem that the embodiment of the invention will solve provides a kind of electric supply installation of switch power supply of external convertible frequency air conditioner, to overcome in the prior art power input unsettled defective of input power supply that causes Switching Power Supply in parallel owing to the power input and the control compressor operation circuit of Switching Power Supply.
For achieving the above object, the technical scheme of the embodiment of the invention provides a kind of electric supply installation of switch power supply of external convertible frequency air conditioner, and described device comprises: filter circuit is used for the AC power of input is carried out filtering; First power-switching circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered switching power circuit, gives described switching power circuit power supply; The second source change-over circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered control compressor operation circuit, gives described control compressor operation circuit supply.
Wherein, described filter circuit is made up of first electric capacity, second electric capacity, first inductance and second inductance, the two ends of first electric capacity are the input of AC power, the two ends of second electric capacity are the output of filter circuit, the two ends of first inductance are connected with an end of first electric capacity and second electric capacity respectively, and the two ends of second inductance are connected with the other end of first electric capacity with second electric capacity respectively.
Wherein, described first power-switching circuit is made up of four rectifier diodes and the 4th electric capacity, described four rectifier diodes connect to form second rectifier bridge, first output of described filter circuit is connected to the ac input end of second rectifier bridge, the positive pole of the dc output end of second rectifier bridge is connected with the positive pole of the 4th electric capacity, and the negative pole of the dc output end of second rectifier bridge is connected with the negative pole of the 4th electric capacity.
Wherein, described four rectifier diodes comprise first rectifier diode, second rectifier diode, the 3rd rectifier diode and the 4th rectifier diode, the positive pole of first rectifier diode is connected with the positive pole of the 4th rectifier diode and the negative pole of the 4th electric capacity, the negative pole of first rectifier diode is connected with the positive pole of second rectifier diode and first output of filter circuit, the negative pole of second rectifier diode is connected with the negative pole of the 3rd rectifier diode and the positive pole of the 4th electric capacity, and the positive pole of the 3rd rectifier diode is connected with the negative pole of the 4th rectifier diode and second output of filter circuit.
Wherein, the two ends of described the 4th electric capacity are the output of first power-switching circuit, and the positive pole of the 4th electric capacity is connected to the positive pole of the power input of switching power circuit, and the negative pole of the 4th electric capacity is connected to the negative pole of the power input of switching power circuit.
Wherein, described second source change-over circuit comprises first rectifier bridge and the 3rd electric capacity, the output of filter circuit is connected to the ac input end of first rectifier bridge, the positive pole of the dc output end of first rectifier bridge is connected with the positive pole of the 3rd electric capacity, and the negative pole of the dc output end of first rectifier bridge is connected with the negative pole of the 3rd electric capacity.
Wherein, the two ends of described the 3rd electric capacity are the output of second source change-over circuit, the positive pole of the 3rd electric capacity is connected to the positive pole of the power input of control compressor operation circuit, and the negative pole of the 3rd electric capacity is connected to the negative pole of the power input of control compressor operation circuit.
Technique scheme only is an optimal technical scheme of the present invention, have following advantage: the embodiment of the invention is by first power-switching circuit and second source change-over circuit, respectively filtered AC power is converted to DC power supply, and the DC power supply after will changing respectively offers switching power circuit and control compressor operation circuit, give described switching power circuit and control compressor operation circuit supply respectively, thereby the power input of switching power circuit and control compressor operation circuit is isolated, improved the stability of the input power supply of Switching Power Supply.
Description of drawings
Fig. 1 is the structure chart of electric supply installation of a kind of switch power supply of external convertible frequency air conditioner of prior art;
Fig. 2 is the structure chart of electric supply installation of a kind of switch power supply of external convertible frequency air conditioner of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The electric supply installation of a kind of switch power supply of external convertible frequency air conditioner of the embodiment of the invention as shown in Figure 2, this device comprises filter circuit, first power-switching circuit and second source change-over circuit, wherein the input of filter circuit is connected to AC power, output is connected with the input of first power-switching circuit with the second source change-over circuit respectively, and the output that the output of first power-switching circuit is connected to switching power circuit and second source change-over circuit is connected to control compressor operation circuit.
Filter circuit is used for the AC power of input is carried out filtering, this circuit comprises capacitor C 21, capacitor C 22, inductance L 21 and inductance L 22, the two ends of capacitor C 21 are the input of AC power, the two ends of capacitor C 22 are the output of filter circuit, the two ends of inductance L 21 are connected with an end of capacitor C 21 and capacitor C 22 respectively, and the two ends of inductance L 21 are connected with the other end of capacitor C 21 with capacitor C 22 respectively.Wherein, the capacitance of capacitor C 21 is 225 microfarads, and withstand voltage is 275 volts; The capacitance of capacitor C 22 is 225 microfarads, and withstand voltage is 275 volts; Inductance L 21 and inductance L 22 are common mode inductance, and the inductance value of inductance L 21 is 8mH, and current value is selected according to the power of air conditioner, its scope is 10A-30A, the inductance value of inductance L 22 is 8mH, and current value is selected according to the power of air conditioner, and its scope is 10A-30A.
First power-switching circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered switching power circuit, gives described switching power circuit power supply.First power-switching circuit is by four rectifier diode D21, D22, D23 and D24, and capacitor C 24 is formed, described four rectifier diodes connect to form second rectifier bridge, first output of described filter circuit is connected to the ac input end of second rectifier bridge, the positive pole of the dc output end of second rectifier bridge is connected with the positive pole of capacitor C 24, and the negative pole of the dc output end of second rectifier bridge is connected with the negative pole of capacitor C 24.Wherein the positive pole of rectifier diode D21 is connected with the positive pole of rectifier diode D24 and the negative pole of capacitor C 24, the negative pole of rectifier diode D21 is connected with the positive pole of rectifier diode D22 and first output of filter circuit, the negative pole of rectifier diode D22 is connected with the negative pole of rectifier diode D23 and the positive pole of capacitor C 24, and the positive pole of rectifier diode D23 is connected with the negative pole of rectifier diode D24 and second output of filter circuit.The two ends of capacitor C 24 are the output of first power-switching circuit, and the positive pole of capacitor C 24 is connected to the positive pole of the power input of switching power circuit, and the negative pole of capacitor C 24 is connected to the negative pole of the power input of switching power circuit.Wherein, the current value of rectifier diode D21, D22, D23 and D24 is 1A, and withstand voltage is 1000V; The capacitance of capacitor C 24 is 47 microfarads, and withstand voltage is 450 volts.
The second source change-over circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered control compressor operation circuit, gives described control compressor operation circuit supply.The second source change-over circuit comprises rectifier bridge Z21 and capacitor C 23, first output of filter circuit is connected to the ac input end of rectifier bridge Z21, the positive pole of the dc output end of rectifier bridge Z21 is connected with the positive pole of capacitor C 23, and the negative pole of the dc output end of rectifier bridge Z21 is connected with the negative pole of capacitor C 23.The two ends of capacitor C 23 are the output of second source change-over circuit, and the positive pole of capacitor C 23 is connected to the positive pole of the power input of control compressor operation circuit, and the negative pole of capacitor C 23 is connected to the negative pole of the power input of control compressor operation circuit.Wherein, the current value of rectifier bridge Z21 is selected according to the power of air conditioner, and its scope is 10A-30A, and withstand voltage is 1000V; The capacitance of capacitor C 23 is 2 microfarads, and withstand voltage is 680 volts, also can be by 2 or 3 electrochemical capacitor parallel connections, and the parameter of each electric capacity is: capacitance is 820 microfarads, withstand voltage is 450 volts.
The embodiment of the invention is by first power-switching circuit and second source change-over circuit, respectively filtered AC power is converted to DC power supply, and the DC power supply after will changing respectively offers switching power circuit and control compressor operation circuit, give described switching power circuit and control compressor operation circuit supply respectively, thereby the power input of switching power circuit and control compressor operation circuit is isolated, improved the stability of the input power supply of Switching Power Supply.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the electric supply installation of a switch power supply of external convertible frequency air conditioner is characterized in that, described device comprises:
Filter circuit is used for the AC power of input is carried out filtering;
First power-switching circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered switching power circuit, gives described switching power circuit power supply;
The second source change-over circuit is used for the filtered AC power of the described filter circuit of process is converted to DC power supply, and described DC power supply is offered control compressor operation circuit, gives described control compressor operation circuit supply;
Described filter circuit is made up of first electric capacity, second electric capacity, first inductance and second inductance, the two ends of first electric capacity are the input of AC power, the two ends of second electric capacity are the output of filter circuit, the two ends of first inductance are connected with an end of first electric capacity and second electric capacity respectively, and the two ends of second inductance are connected with the other end of first electric capacity with second electric capacity respectively.
2. the electric supply installation of switch power supply of external convertible frequency air conditioner according to claim 1, it is characterized in that, described first power-switching circuit is made up of four rectifier diodes and the 4th electric capacity, described four rectifier diodes connect to form second rectifier bridge, first output of described filter circuit is connected to the ac input end of second rectifier bridge, the positive pole of the dc output end of second rectifier bridge is connected with the positive pole of the 4th electric capacity, and the negative pole of the dc output end of second rectifier bridge is connected with the negative pole of the 4th electric capacity.
3. as the electric supply installation of switch power supply of external convertible frequency air conditioner as described in the claim 2, it is characterized in that, described four rectifier diodes comprise first rectifier diode, second rectifier diode, the 3rd rectifier diode and the 4th rectifier diode, the positive pole of first rectifier diode is connected with the positive pole of the 4th rectifier diode and the negative pole of the 4th electric capacity, the negative pole of first rectifier diode is connected with the positive pole of second rectifier diode and first output of filter circuit, the negative pole of second rectifier diode is connected with the negative pole of the 3rd rectifier diode and the positive pole of the 4th electric capacity, and the positive pole of the 3rd rectifier diode is connected with the negative pole of the 4th rectifier diode and second output of filter circuit.
4. as the electric supply installation of switch power supply of external convertible frequency air conditioner as described in the claim 2, it is characterized in that, the two ends of described the 4th electric capacity are the output of first power-switching circuit, the positive pole of the 4th electric capacity is connected to the positive pole of the power input of switching power circuit, and the negative pole of the 4th electric capacity is connected to the negative pole of the power input of switching power circuit.
5. the electric supply installation of switch power supply of external convertible frequency air conditioner according to claim 1, it is characterized in that, described second source change-over circuit comprises first rectifier bridge and the 3rd electric capacity, the output of filter circuit is connected to the ac input end of first rectifier bridge, the positive pole of the dc output end of first rectifier bridge is connected with the positive pole of the 3rd electric capacity, and the negative pole of the dc output end of first rectifier bridge is connected with the negative pole of the 3rd electric capacity.
6. as the electric supply installation of switch power supply of external convertible frequency air conditioner as described in the claim 5, it is characterized in that, the two ends of described the 3rd electric capacity are the output of second source change-over circuit, the positive pole of the 3rd electric capacity is connected to the positive pole of the power input of control compressor operation circuit, and the negative pole of the 3rd electric capacity is connected to the negative pole of the power input of control compressor operation circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100818359A CN101577484B (en) | 2008-05-08 | 2008-05-08 | Power supply device of switch power supply of external convertible frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100818359A CN101577484B (en) | 2008-05-08 | 2008-05-08 | Power supply device of switch power supply of external convertible frequency air conditioner |
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| Publication Number | Publication Date |
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| CN101577484A CN101577484A (en) | 2009-11-11 |
| CN101577484B true CN101577484B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100818359A Active CN101577484B (en) | 2008-05-08 | 2008-05-08 | Power supply device of switch power supply of external convertible frequency air conditioner |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723858B (en) * | 2012-07-04 | 2015-04-08 | 铭薪电子（深圳）有限公司 | Car-mounted wide power supply voltage stabilization plate and navigation television |
| WO2015165106A1 (en) * | 2014-04-30 | 2015-11-05 | 深圳欧陆通电子有限公司 | Electrical device, power supply device, and rectifier circuit thereof |
| CN108075673B (en) * | 2017-09-19 | 2020-02-28 | 珠海格力电器股份有限公司 | Multi-path common-ground rectification circuit and switching power supply |
| CN111244885B (en) * | 2020-01-19 | 2022-07-29 | 广东美的制冷设备有限公司 | Control circuit, control method, air conditioner, and computer-readable storage medium |
| CN115603596A (en) * | 2021-07-08 | 2023-01-13 | 合肥华凌股份有限公司（Cn） | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366597A (en) * | 2000-04-03 | 2002-08-28 | 大金工业株式会社 | Air conditioner |
| CN2567863Y (en) * | 2002-03-08 | 2003-08-20 | 珠海格力电器股份有限公司 | Electromagnetic compatible filter circuit of frequency conversion air conditioner |
| CN1783683A (en) * | 2004-10-01 | 2006-06-07 | 松下电器产业株式会社 | Air conditioner |
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2008
- 2008-05-08 CN CN2008100818359A patent/CN101577484B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366597A (en) * | 2000-04-03 | 2002-08-28 | 大金工业株式会社 | Air conditioner |
| CN2567863Y (en) * | 2002-03-08 | 2003-08-20 | 珠海格力电器股份有限公司 | Electromagnetic compatible filter circuit of frequency conversion air conditioner |
| CN1783683A (en) * | 2004-10-01 | 2006-06-07 | 松下电器产业株式会社 | Air conditioner |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-161940A 2005.06.23 |
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