CN206398935U - A kind of control circuit of direct-flow frequency converting - Google Patents
A kind of control circuit of direct-flow frequency converting Download PDFInfo
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- CN206398935U CN206398935U CN201720046870.1U CN201720046870U CN206398935U CN 206398935 U CN206398935 U CN 206398935U CN 201720046870 U CN201720046870 U CN 201720046870U CN 206398935 U CN206398935 U CN 206398935U
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Abstract
A kind of control circuit of direct-flow frequency converting that the utility model is provided, has the feature that, including：DC filter, input connection dc source；The output end connection of frequency converter, input and DC filter；The output end connection of compressor, input and frequency converter；The output end of first inverter circuit, input and DC filter, the input of frequency converter are connected respectively；Condensation fan, input is connected with the output end of the first inverter circuit；The output end of second inverter circuit, input and DC filter, the input of frequency converter, the input of the first inverter circuit are connected respectively；And pressure fan, input is connected with the output end of the second inverter circuit.
Description
Technical field
The utility model is related to a kind of control circuit, more particularly to a kind of control circuit of direct-flow frequency converting.
Background technology
The power supply that DC frequency converting air-conditioner is used is DC700V, and its direct current exported includes larger ripple component, can lead
Cause air conditioning frequency converter, the component damage of motor or shorten the life-span.If to dc source rectification before electrical equipment, i.e.,
Install wave filter additional on DC circuit, then can reduce the ripple component between output voltage, make voltage as far as possible close to preferable
DC voltage, then can greatly reduce the damage of the frequency converter, motor of DC frequency converting air-conditioner unit.
Existing DC frequency converting air-conditioner unit is compressor, axial flow blower, the centrifugal blower of full frequency converter sets, i.e. air-conditioner set
It is DC frequency-changing；To avoid the impact of the big pulse of dc source, wave filter need to be installed additional on control circuit accordingly, for dropping
Ripple component between low output voltage, makes voltage as far as possible close to preferable DC voltage, to reduce the damage of parts.Three kinds
Frequency conversion parts, need to install three wave filters additional, so increase unit cost, while also increasing the failure of DC frequency converting air-conditioner unit
Rate.
Utility model content
The utility model is carried out to solve the above problems, it is therefore intended that provide a kind of reducing fault rate, into
This low control circuit of direct-flow frequency converting.
A kind of control circuit of direct-flow frequency converting that the utility model is provided, has the feature that, including：DC filtering
Device, input connection dc source；The output end connection of frequency converter, input and DC filter；Compressor, input is with becoming
The output end connection of frequency device；The output end of first inverter circuit, input and DC filter, the input of frequency converter connect respectively
Connect；Condensation fan, input is connected with the output end of the first inverter circuit；Second inverter circuit, input and DC filter
Output end, the input of frequency converter, the input of the first inverter circuit connect respectively；And pressure fan, input and second
The output end connection of inverter circuit.
A kind of control circuit of direct-flow frequency converting that the utility model is provided, also has the feature that, including：Precharge
The input of road, input connection dc source, output end and frequency converter is connected.
A kind of control circuit of direct-flow frequency converting that the utility model is provided, also has the feature that：Wherein, direct current
Source passes through DC filter rectification after precharging circuit.
The effect of utility model and effect
A kind of control circuit of direct-flow frequency converting according to involved by the utility model, in the control of DC frequency converting air-conditioner unit
The usage quantity of wave filter is reduced on circuit, i.e., original three wave filters are kept to a wave filter, i.e. compressor, axle stream wind
Machine, three kinds of parts circuits of centrifugal blower share a wave filter, can still ensure reduce output voltage between pulsation into
Point, make voltage as far as possible close to preferable DC voltage, while DC frequency converting air-conditioner unit damage of components is reduced, moreover it is possible to subtract
The cost of few unit, and reduce the fault rate of DC frequency converting air-conditioner unit.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of control circuit of direct-flow frequency converting of the utility model in embodiment.
Embodiment
Referring to the drawings and embodiment makees detailed to a kind of control circuit of direct-flow frequency converting involved by the utility model
Thin description.
Fig. 1 is a kind of circuit diagram of control circuit of direct-flow frequency converting of the utility model in embodiment.
As shown in figure 1, a kind of control circuit of direct-flow frequency converting has：Precharging circuit 1, DC filter 2, frequency converter 3,
Compressor 4, the first inverter circuit 5, condensation fan 6, the second inverter circuit 7 and pressure fan 8.
The input of precharging circuit 1 is divided into positive pole and negative pole, and positive pole connects the positive pole of the dc source, and negative pole connection is straight
Flow the negative pole of power supply.The output end of precharging circuit 1 is also classified into positive pole and negative pole.
It is connected with the input of the frequency converter.
The input of DC filter 2 has positive pole and negative pole, and positive pole is connected with the positive pole of the output end of precharging circuit 1, bears
Pole is connected with the negative pole of the output end of precharging circuit 1.
The input of frequency converter 3 is connected with the output end of the DC filter 2, and the input of compressor 4 becomes with described
The output end connection of frequency device 3.
The input of first inverter circuit 5 and the output end of the DC filter 2, the input point of the frequency converter 3
Do not connect, the input of condensation fan 6 is connected with the output end of first inverter circuit 5.
The input of second inverter circuit 7 and the output end of the DC filter 2, the input of the frequency converter 3, institute
The input for stating the first inverter circuit 5 is connected respectively, and the input of pressure fan 8 is connected with the output end of second inverter circuit 7.
Dc source is after precharging circuit 1, by the rectification of DC filter 2, then input converter 3, by frequency converter 3
With the first inverter circuit 5, the second inverter circuit 7 control compressor 4, condensation fan 6, pressure fan 8 output frequency and voltage.
DC filter 2 ensure that the quality of the power supply of the output of precharging circuit 1 so that because electric current poor quality causes subsequently
The probability that electrical equipment is damaged is greatly reduced.
The effect of embodiment and effect
A kind of control circuit of direct-flow frequency converting according to involved by the present embodiment, in the control electricity of DC frequency converting air-conditioner unit
The usage quantity of wave filter is reduced on road, i.e., original three wave filters are kept to a wave filter, i.e. compressor, axle stream wind
Machine, three kinds of parts circuits of centrifugal blower share a wave filter, can still ensure reduce output voltage between pulsation into
Point, make voltage as far as possible close to preferable DC voltage, while DC frequency converting air-conditioner unit damage of components is reduced, moreover it is possible to subtract
The cost of few unit, and reduce the fault rate of DC frequency converting air-conditioner unit.
Above-mentioned embodiment is preferred case of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (3)
1. a kind of control circuit of direct-flow frequency converting, it is characterised in that including：
DC filter, input connection dc source；
Frequency converter, input is connected with the output end of the DC filter；
Compressor, input is connected with the output end of the frequency converter；
First inverter circuit, input is connected respectively with the output end of the DC filter, the input of the frequency converter；
Condensation fan, input is connected with the output end of first inverter circuit；
Second inverter circuit, it is input and the output end of the DC filter, the input of the frequency converter, described first inverse
The input for becoming circuit is connected respectively；And
Pressure fan, input is connected with the output end of second inverter circuit.
2. a kind of control circuit of direct-flow frequency converting according to claim 1, it is characterised in that also include：
Precharging circuit, input connects the dc source, and output end is connected with the input of the frequency converter.
3. a kind of control circuit of direct-flow frequency converting according to claim 2, it is characterised in that：
Wherein, dc source passes through the DC filter rectification after the precharging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046870.1U CN206398935U (en) | 2017-01-16 | 2017-01-16 | A kind of control circuit of direct-flow frequency converting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046870.1U CN206398935U (en) | 2017-01-16 | 2017-01-16 | A kind of control circuit of direct-flow frequency converting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206398935U true CN206398935U (en) | 2017-08-11 |
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ID=59518262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720046870.1U Active CN206398935U (en) | 2017-01-16 | 2017-01-16 | A kind of control circuit of direct-flow frequency converting |
Country Status (1)
| Country | Link |
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| CN (1) | CN206398935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984739A (en) * | 2021-04-08 | 2021-06-18 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
-
2017
- 2017-01-16 CN CN201720046870.1U patent/CN206398935U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984739A (en) * | 2021-04-08 | 2021-06-18 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
| CN112984739B (en) * | 2021-04-08 | 2022-03-18 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
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