CN204478385U - Central air-conditioning cooling blower protection circuit - Google Patents
Central air-conditioning cooling blower protection circuit Download PDFInfo
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- CN204478385U CN204478385U CN201420830819.6U CN201420830819U CN204478385U CN 204478385 U CN204478385 U CN 204478385U CN 201420830819 U CN201420830819 U CN 201420830819U CN 204478385 U CN204478385 U CN 204478385U
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Abstract
Central air-conditioning cooling blower protection circuit of the present utility model, devises current foldback circuit and open-phase protection circuit, realizes blower fan defencive function; Because blower fan is in operation process, comparatively large by ectocine, devise guard time regulatory function, delay protection can be carried out according to the applicable cases at scene; The on-the-spot each project of power of fan is not quite similar, and devises protection limitation function; Can be connected with single-chip microcomputer simultaneously, realize remote monitoring, advantage, adopt and reasonably design, defencive function is complete, antijamming capability is higher; Peripheral components is less, realizes cost simple, possesses situ configuration regulatory function.
Description
Technical field
The utility model relates to central air-conditioning control field, specifically a kind of central air-conditioning cooling blower protection circuit.
Background technology
In central air-conditioning water-cooled unit, recirculated cooling water is used to be one of the most frequently used method.In order to make warmed-up water cooling down again in unit, again recycling, often using cooling tower.The features such as blower fan is the critical component of mechanical-draft cooling tower, usually all adopts outdoor vertical Special motor for cooling tower, has efficiency high, power consumptive province, and water resistance is good.Water is when cooling tower drips, and cooling blower makes it to contact more fully with air, transfers heat to surrounding air, water temperature is lowered.Because blower fan is in operating condition for a long time, therefore need Real-Time Monitoring fan condition, improve blower fan maintainability and stability.
Utility model content
The utility model provides a kind of central air-conditioning cooling blower protection circuit, can detect the operational situation of blower fan in real time, protects fan safe, works reliably.
The utility model is by the following technical solutions: central air-conditioning cooling blower protection circuit, comprise chip NE556, first pin of chip NE556 connects chip NE556 second pin and the 6th pin by resistance R5, 6th pin of chip NE556 is by electric capacity C2 ground connection, chip NE556 the 3rd pin connects Zener diode D2 negative pole, Zener diode D2 plus earth, chip NE556 first pin connects the mobile terminal of slide rheostat R2 by resistance R4, a stiff end of slide rheostat R2 is by resistance R3 ground connection, another stiff end contact resistance R1 one end of slide rheostat R2, the resistance R1 other end connects diode D1 negative pole and electric capacity C1 one end respectively, electric capacity C1 other end ground connection, diode D1 positive pole connects an output of current transformer, another output head grounding of current transformer, 4th pin of chip NE556, tenth pin is all connected 12V voltage with the 14 pin, 12V voltage is by electric capacity C7 ground connection, resistance R16 mono-termination 12V voltage, the positive pole of resistance R16 other end sending and receiving optical diode LED2, the negative pole of Light-Emitting Diode LED2 connects one end of chip NE556 the 5th pin and slide rheostat R12 respectively, slide rheostat R12 other end connecting resistance R11 one end, another terminating diode of resistance R11 D8 negative pole, diode D8 positive pole connects Zener diode D7 negative pole respectively, chip NE556 the 8th pin, chip NE556 the 12 pin, Zener diode D7 plus earth, diode D3 positive pole connects an output of voltage transformer pt 1, diode D3 negative pole connects electric capacity C3 one end and resistance R6 one end respectively, the electric capacity C3 other end connects another output of voltage transformer pt 1 and triode Q1 emitter stage respectively, another termination triode of resistance R6 Q1 base stage, triode Q1 colelctor electrode connects 12V voltage, triode Q1 emitter stage connects triode Q2 colelctor electrode, triode Q2 base stage connecting resistance R7 one end, the resistance R7 other end connects electric capacity C4 one end and diode D4 negative pole respectively, diode D4 positive pole connects voltage transformer pt 2 one outputs, the electric capacity C4 other end connects another output of voltage transformer pt 2 and triode Q2 emitter stage respectively, triode Q2 emitter stage connects triode Q3 colelctor electrode, triode Q3 base stage connecting resistance R8 one end, another terminating diode of resistance R8 D5 negative pole, diode D5 positive pole connects voltage transformer pt 3 one outputs, electric capacity C5 mono-terminating diode D5 negative pole, the electric capacity C5 other end connects another output of voltage transformer RT3 and triode Q3 emitter stage respectively, triode Q3 emitter stage is by resistance R10 ground connection, triode Q3 emitter stage is contact resistance R9 one end and diode D6 negative pole respectively, the resistance R9 other end connects Light-Emitting Diode LED1 negative pole, Light-Emitting Diode LED1 positive pole connects 12V voltage, diode D6 positive pole connects electric capacity C6 one end and chip NE556 the 8th pin respectively, another termination 12V voltage of electric capacity C6, diode D6 puts into negative pole and connects single-chip microcomputer by resistance R13, 5th pin of chip NE556 connects single-chip microcomputer by resistance R15, chip NE556 the 9th pin connects single-chip microcomputer by resistance R14.
The beneficial effects of the utility model are: the utility model mainly checks the overcurrent of blower fan; open-phase protection; realize blower fan defencive function; because blower fan is in operation process; comparatively large by ectocine, devise guard time regulatory function, delay protection can be carried out according to the applicable cases at scene; the on-the-spot each project of power of fan is not quite similar, and devises protection limitation function.Can be connected with single-chip microcomputer simultaneously, realize remote monitoring, advantage, adopt and reasonably design, defencive function is complete, antijamming capability is higher.Peripheral components is less, realizes cost simple, possesses situ configuration regulatory function.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Detailed description of the invention
Central air-conditioning cooling blower protection circuit as shown in Figure 1, comprise chip NE556, first pin of chip NE556 connects chip NE556 second pin and the 6th pin by resistance R5, 6th pin of chip NE556 is by electric capacity C2 ground connection, chip NE556 the 3rd pin connects Zener diode D2 negative pole, Zener diode D2 plus earth, chip NE556 first pin connects the mobile terminal of slide rheostat R2 by resistance R4, a stiff end of slide rheostat R2 is by resistance R3 ground connection, another stiff end contact resistance R1 one end of slide rheostat R2, the resistance R1 other end connects diode D1 negative pole and electric capacity C1 one end respectively, electric capacity C1 other end ground connection, diode D1 positive pole connects an output of current transformer, another output head grounding of current transformer, 4th pin of chip NE556, tenth pin is all connected 12V voltage with the 14 pin, 12V voltage is by electric capacity C7 ground connection, resistance R16 mono-termination 12V voltage, the positive pole of resistance R16 other end sending and receiving optical diode LED2, the negative pole of Light-Emitting Diode LED2 connects one end of chip NE556 the 5th pin and slide rheostat R12 respectively, slide rheostat R12 other end connecting resistance R11 one end, another terminating diode of resistance R11 D8 negative pole, diode D8 positive pole connects Zener diode D7 negative pole respectively, chip NE556 the 8th pin, chip NE556 the 12 pin, Zener diode D7 plus earth, diode D3 positive pole connects an output of voltage transformer pt 1, diode D3 negative pole connects electric capacity C3 one end and resistance R6 one end respectively, the electric capacity C3 other end connects another output of voltage transformer pt 1 and triode Q1 emitter stage respectively, another termination triode of resistance R6 Q1 base stage, triode Q1 colelctor electrode connects 12V voltage, triode Q1 emitter stage connects triode Q2 colelctor electrode, triode Q2 base stage connecting resistance R7 one end, the resistance R7 other end connects electric capacity C4 one end and diode D4 negative pole respectively, diode D4 positive pole connects voltage transformer pt 2 one outputs, the electric capacity C4 other end connects another output of voltage transformer pt 2 and triode Q2 emitter stage respectively, triode Q2 emitter stage connects triode Q3 colelctor electrode, triode Q3 base stage connecting resistance R8 one end, another terminating diode of resistance R8 D5 negative pole, diode D5 positive pole connects voltage transformer pt 3 one outputs, electric capacity C5 mono-terminating diode D5 negative pole, the electric capacity C5 other end connects another output of voltage transformer RT3 and triode Q3 emitter stage respectively, triode Q3 emitter stage is by resistance R10 ground connection, triode Q3 emitter stage is contact resistance R9 one end and diode D6 negative pole respectively, the resistance R9 other end connects Light-Emitting Diode LED1 negative pole, Light-Emitting Diode LED1 positive pole connects 12V voltage, diode D6 positive pole connects electric capacity C6 one end and chip NE556 the 8th pin respectively, another termination 12V voltage of electric capacity C6, diode D6 puts into negative pole and connects single-chip microcomputer by resistance R13, 5th pin of chip NE556 connects single-chip microcomputer by resistance R15, chip NE556 the 9th pin connects single-chip microcomputer by resistance R14.
Blower fan protection circuit mainly completes to be protected blower fan of cooling tower; the overcurrent of main inspection blower fan; open-phase protection; realize blower fan defencive function, because blower fan is in operation process, larger by ectocine; devise guard time regulatory function; can carry out delay protection according to the applicable cases at scene, the on-the-spot each project of power of fan is not quite similar, and devises protection limitation function.Can be connected with single-chip microcomputer simultaneously, realize remote monitoring, advantage, adopt and reasonably design, defencive function is complete, antijamming capability is higher.Peripheral components is less, realizes cost simple, possesses situ configuration regulatory function.
Except structure described in the utility model, all the other are prior art.
The above is preferred embodiment of the present utility model; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection domain of the present utility model.
Claims (1)
1. central air-conditioning cooling blower protection circuit, it is characterized in that, comprise chip NE556, first pin of chip NE556 connects chip NE556 second pin and the 6th pin by resistance R5, 6th pin of chip NE556 is by electric capacity C2 ground connection, chip NE556 the 3rd pin connects Zener diode D2 negative pole, Zener diode D2 plus earth, chip NE556 first pin connects the mobile terminal of slide rheostat R2 by resistance R4, a stiff end of slide rheostat R2 is by resistance R3 ground connection, another stiff end contact resistance R1 one end of slide rheostat R2, the resistance R1 other end connects diode D1 negative pole and electric capacity C1 one end respectively, electric capacity C1 other end ground connection, diode D1 positive pole connects an output of current transformer, another output head grounding of current transformer, 4th pin of chip NE556, tenth pin is all connected 12V voltage with the 14 pin, 12V voltage is by electric capacity C7 ground connection, resistance R16 mono-termination 12V voltage, the positive pole of resistance R16 other end sending and receiving optical diode LED2, the negative pole of Light-Emitting Diode LED2 connects one end of chip NE556 the 5th pin and slide rheostat R12 respectively, slide rheostat R12 other end connecting resistance R11 one end, another terminating diode of resistance R11 D8 negative pole, diode D8 positive pole connects Zener diode D7 negative pole respectively, chip NE556 the 8th pin, chip NE556 the 12 pin, Zener diode D7 plus earth, diode D3 positive pole connects an output of voltage transformer pt 1, diode D3 negative pole connects electric capacity C3 one end and resistance R6 one end respectively, the electric capacity C3 other end connects another output of voltage transformer pt 1 and triode Q1 emitter stage respectively, another termination triode of resistance R6 Q1 base stage, triode Q1 colelctor electrode connects 12V voltage, triode Q1 emitter stage connects triode Q2 colelctor electrode, triode Q2 base stage connecting resistance R7 one end, the resistance R7 other end connects electric capacity C4 one end and diode D4 negative pole respectively, diode D4 positive pole connects voltage transformer pt 2 one outputs, the electric capacity C4 other end connects another output of voltage transformer pt 2 and triode Q2 emitter stage respectively, triode Q2 emitter stage connects triode Q3 colelctor electrode, triode Q3 base stage connecting resistance R8 one end, another terminating diode of resistance R8 D5 negative pole, diode D5 positive pole connects voltage transformer pt 3 one outputs, electric capacity C5 mono-terminating diode D5 negative pole, the electric capacity C5 other end connects another output of voltage transformer RT3 and triode Q3 emitter stage respectively, triode Q3 emitter stage is by resistance R10 ground connection, triode Q3 emitter stage is contact resistance R9 one end and diode D6 negative pole respectively, the resistance R9 other end connects Light-Emitting Diode LED1 negative pole, Light-Emitting Diode LED1 positive pole connects 12V voltage, diode D6 positive pole connects electric capacity C6 one end and chip NE556 the 8th pin respectively, another termination 12V voltage of electric capacity C6, diode D6 puts into negative pole and connects single-chip microcomputer by resistance R13, 5th pin of chip NE556 connects single-chip microcomputer by resistance R15, chip NE556 the 9th pin connects single-chip microcomputer by resistance R14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420830819.6U CN204478385U (en) | 2014-12-25 | 2014-12-25 | Central air-conditioning cooling blower protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420830819.6U CN204478385U (en) | 2014-12-25 | 2014-12-25 | Central air-conditioning cooling blower protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204478385U true CN204478385U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420830819.6U Expired - Fee Related CN204478385U (en) | 2014-12-25 | 2014-12-25 | Central air-conditioning cooling blower protection circuit |
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| CN (1) | CN204478385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406273A (en) * | 2014-12-25 | 2015-03-11 | 李钢 | Protective circuit of central air-conditioning cooling fan |
-
2014
- 2014-12-25 CN CN201420830819.6U patent/CN204478385U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406273A (en) * | 2014-12-25 | 2015-03-11 | 李钢 | Protective circuit of central air-conditioning cooling fan |
| CN104406273B (en) * | 2014-12-25 | 2017-02-22 | 李钢 | Protective circuit of central air-conditioning cooling fan |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20161225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |