CN201845061U - Circuit breaking and short circuit detection circuit of alternating current fan - Google Patents
Circuit breaking and short circuit detection circuit of alternating current fan Download PDFInfo
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- CN201845061U CN201845061U CN2010205796274U CN201020579627U CN201845061U CN 201845061 U CN201845061 U CN 201845061U CN 2010205796274 U CN2010205796274 U CN 2010205796274U CN 201020579627 U CN201020579627 U CN 201020579627U CN 201845061 U CN201845061 U CN 201845061U
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 36
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000005070 sampling Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model provides a detection circuitry that alternating current fan opened circuit and short circuit, including the fan main circuit, rectification filter circuit and microprocessor, wherein the commercial power is connected to the input of fan main circuit, rectification filter circuit's input is connected to the output, its characterized in that still includes fan detection circuitry and the fan short circuit detection circuitry that opens circuit, wherein the input of fan detection circuitry and the fan short circuit detection circuitry that opens circuit is connected respectively to the output of rectification filter circuit, microprocessor's input is connected respectively to the output of fan detection circuitry and the fan short circuit detection circuitry that opens circuit. The utility model discloses owing to adopted series resistance sampling current signal and through the fan after rectification filtering open circuit and short circuit detection circuitry in the major loop, not only can very effectually detect the open circuit and the short-circuit fault that the alternating current fan takes place, improved the life of key components and parts such as rectifier bridge, IGBT and coil panel in the core greatly, guaranteed electrical system's quality and reliability, and the circuit implementation is simple, components and parts low cost.
Description
Technical field
The utility model relates to opening circuit of a kind of AC blower fan and short-circuit detecting circuit, the opening circuit and short-circuit detecting circuit of particularly a kind of commercial electromagnetic oven AC blower fan.
Background technology
Commercially available commercial electromagnetic oven is general to adopt the 220V of a plurality of parallel connections or 380V AC blower fan realizing heat radiation, and its cooling system is not provided with generally that AC blower fan opens circuit and the detection of short circuit; When in a plurality of blower fans one or several opens circuit in final assembly or use or during short trouble, because the residing working environment of movement does not reach alarm temperature in the short time, therefore be difficult for the detection and Identification of Be Controlled system to the fault that has produced, but in the complete machine long-play, owing to one or several fan trouble makes the radiating efficiency of cooling system reduce rapidly, cause rectifier bridge in the movement, key components such as IGBT and coil panel long-play is under the higher relatively environment of temperature, not only greatly reduce the serviceable life of these key componentses, also have influence on the q﹠r of electric-control system, finally cause product bug and influence user's normal use.
Blower fan short circuit and short trouble detect in order to address this problem many conventional schemes such as Hall current mutual inductor, low-frequency current mutual inductor or simulation optocoupler that can adopt in some enterprises, but the cost of components and parts is higher, particularly adopt the low-frequency current mutual inductor to detect AC blower fan fault about rated current 100mA, the technological design of its electric-control system and processing and fabricating all have bigger difficulty.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and provides a kind of reasonable in design, simply effective, safe and reliable and lower-cost AC blower fan opens circuit and the testing circuit of short circuit.
The technical solution of the utility model is: a kind of AC blower fan opens circuit and the testing circuit of short circuit, comprise main circuit of the air blower, current rectifying and wave filtering circuit and microprocessor, wherein the input end of main circuit of the air blower connects civil power, output terminal connects the input end of current rectifying and wave filtering circuit, it is characterized in that also comprising blower fan broken circuit detection circuit and blower fan short-circuit detecting circuit, wherein the output terminal of current rectifying and wave filtering circuit connects the input end of blower fan broken circuit detection circuit and blower fan short-circuit detecting circuit respectively, and blower fan broken circuit detection circuit and the output terminal of blower fan short-circuit detecting circuit are connected the input end of microprocessor respectively.
Described main circuit of the air blower comprises blower fan FAN11 and resistance R 11, and the end of blower fan FAN11 connects civil power, and the other end connects an input end of resistance R 11 and current rectifying and wave filtering circuit, and the other end of resistance R 11 connects another input end of civil power and current rectifying and wave filtering circuit.
Described current rectifying and wave filtering circuit comprises rectifier bridge T21, electrochemical capacitor EC21 and capacitor C 21, wherein the input end of rectifier bridge T21 connects the two ends of resistance R 11 in the main circuit of the air blower respectively, one end of one end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to power end PVCC together, and the other end of the other end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to forceful electric power common port PGND together.
Described blower fan broken circuit detection circuit comprises resistance R 31, resistance R 32, optocoupler U31 and capacitor C 31, wherein the pin 1 of optocoupler U31 connects resistance R 31 1 ends, pin 2 connects forceful electric power common port PGND, pin 3 connects light current public terminal GND and capacitor C 31 1 ends respectively, and pin 4 connects the other end of resistance R 32, capacitor C 31 and the input end of microprocessor respectively; The other end of resistance R 31 connects power end PVCC, and the other end of resistance R 32 connects power supply U.
Described blower fan short-circuit detecting circuit comprises voltage stabilizing diode ZD41, resistance R 41, resistance R 42, optocoupler U41 and capacitor C 41, and wherein the cathode terminal of voltage stabilizing diode ZD41 links to each other with power end PVCC, and anode tap links to each other with an end of resistance R 41; The pin 1 of optocoupler U41 connects the other end of resistance R 41, pin 2 connects forceful electric power common port PGND, pin 3 connects an end of light current public terminal GND and capacitor C 41 respectively, pin 4 connects an end of resistance R 42, the other end of capacitor C 41 and the input end of microprocessor respectively, and the other end of resistance R 42 connects power supply U.
Described optocoupler U31 and optocoupler U41 are the optocoupler that possesses switching characteristic.
The utility model is owing to adopted in major loop resistance in series sample rate current signal and passed through blower fan broken circuit detection circuit and blower fan short-circuit detecting circuit through rectifying and wave-filtering after, not only can very effectively detect opening circuit and short trouble of AC blower fan generation, improved the serviceable life of key componentses such as rectifier bridge, IGBT and coil panel in the movement greatly, guaranteed the q﹠r of electric-control system, and circuit enforcement is simple, and components and parts are with low cost.
Description of drawings
Fig. 1 is the theory diagram of utility model;
Fig. 2 is the circuit theory diagrams of utility model embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further specified.
As shown in Figure 1, the utility model AC blower fan opens circuit and the testing circuit of short circuit, comprise main circuit of the air blower 1, current rectifying and wave filtering circuit 2, blower fan broken circuit detection circuit 3, blower fan short-circuit detecting circuit 4 and microprocessor 5, wherein the input end of main circuit of the air blower 1 connects civil power, output terminal connects the input end of current rectifying and wave filtering circuit 2, the output terminal of current rectifying and wave filtering circuit 2 connects the input end of blower fan broken circuit detection circuit 3 and blower fan short-circuit detecting circuit 4 respectively, and blower fan broken circuit detection circuit 3 and the output terminal of blower fan short-circuit detecting circuit 4 are connected the input end of microprocessor 5 respectively.
As shown in Figure 2, described main circuit of the air blower 1 comprises blower fan FAN11 and resistance R 11, the end of blower fan FAN11 connects civil power, and the other end connects an input end of resistance R 11 and current rectifying and wave filtering circuit 2, and the other end of resistance R 11 connects another input end of civil power and current rectifying and wave filtering circuit 2.Described current rectifying and wave filtering circuit 2 comprises rectifier bridge T21, electrochemical capacitor EC21 and capacitor C 21, wherein the input end of rectifier bridge T21 connects the two ends of resistance R 11 in the main circuit of the air blower 1 respectively, one end of one end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to power end PVCC together, and the other end of the other end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to forceful electric power common port PGND together.Described blower fan broken circuit detection circuit 3 comprises resistance R 31, resistance R 32, optocoupler U31 and capacitor C 31, wherein the pin 1 of optocoupler U31 connects resistance R 31 1 ends, pin 2 connects forceful electric power common port PGND, pin 3 connects light current public terminal GND and capacitor C 31 1 ends respectively, and pin 4 connects the pin 12 of the input end of the other end of resistance R 32, capacitor C 31 and microprocessor 5 respectively; The other end of resistance R 31 connects power end PVCC, and the other end of resistance R 32 connects power supply U.Described blower fan short-circuit detecting circuit 4 comprises voltage stabilizing diode ZD41, resistance R 41, resistance R 42, optocoupler U41 and capacitor C 41, and wherein the cathode terminal of voltage stabilizing diode ZD41 links to each other with power end PVCC, and anode tap links to each other with an end of resistance R 41; The pin 1 of optocoupler U41 connects the other end of resistance R 41, pin 2 connects forceful electric power common port PGND, pin 3 connects an end of light current public terminal GND and capacitor C 41 respectively, pin 4 connects the pin 11 of the input end of the other end of an end, capacitor C 41 of resistance R 42 and microprocessor 5 respectively, and the other end of resistance R 42 connects power supply U.
In the present embodiment, the PC817C optocoupler that optocoupler U31 and optocoupler U41 adopt Sharp Corp to produce.
The principle of work of the utility model circuit is: the sampling resistor of connecting in the blower fan loop, sampled voltage is converted to direct current by rectifying and wave-filtering.When the blower fan operate as normal, optocoupler U31 conducting, the blower fan check point A that opens circuit is a low level, and optocoupler U41 is because the existence of voltage stabilizing diode ZD41 is in cut-off state, and blower fan short-circuit detecting point B is a high level; When blower fan is in off state, optocoupler U31 ends, and the blower fan check point A that opens circuit is a high level, and optocoupler U4 is in cut-off state, and blower fan short-circuit detecting point B is a high level; When blower fan is in short-circuit condition, optocoupler U31 conducting, the blower fan check point A that opens circuit is a low level; The ZD41 Zener breakdown, optocoupler U41 conducting, blower fan short-circuit detecting point B is a low level.MCU judges short circuit, the open circuit fault of blower fan by detecting the detection of high-low level.
Claims (6)
1. an AC blower fan opens circuit and the testing circuit of short circuit, comprise main circuit of the air blower (1), current rectifying and wave filtering circuit (2) and microprocessor (5), wherein the input end of main circuit of the air blower (1) connects civil power, output terminal connects the input end of current rectifying and wave filtering circuit (2), it is characterized in that also comprising blower fan broken circuit detection circuit (3) and blower fan short-circuit detecting circuit (4), wherein the output terminal of current rectifying and wave filtering circuit (2) connects the input end of blower fan broken circuit detection circuit (3) and blower fan short-circuit detecting circuit (4) respectively, and blower fan broken circuit detection circuit (3) and the output terminal of blower fan short-circuit detecting circuit (4) are connected the input end of microprocessor (5) respectively.
2. AC blower fan according to claim 1 opens circuit and the testing circuit of short circuit, it is characterized in that described main circuit of the air blower (1) comprises blower fan FAN11 and resistance R 11, the end of blower fan FAN11 connects civil power, the other end connects an input end of resistance R 11 and current rectifying and wave filtering circuit (2), and the other end of resistance R 11 connects another input end of civil power and current rectifying and wave filtering circuit (2).
3. AC blower fan according to claim 1 opens circuit and the testing circuit of short circuit, it is characterized in that described current rectifying and wave filtering circuit (2) comprises rectifier bridge T21, electrochemical capacitor EC21 and capacitor C 21, wherein the input end of rectifier bridge T21 connects the two ends of resistance R 11 in the main circuit of the air blower (1) respectively, one end of one end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to power end PVCC together, and the other end of the other end, electrochemical capacitor EC21 and the capacitor C 21 of rectifier bridge output is connected to forceful electric power common port PGND together.
4. AC blower fan according to claim 1 opens circuit and the testing circuit of short circuit, it is characterized in that described blower fan broken circuit detection circuit (3) comprises resistance R 31, resistance R 32, optocoupler U31 and capacitor C 31, wherein the pin 1 of optocoupler U31 connects resistance R 31 1 ends, pin 2 connects forceful electric power common port PGND, pin 3 connects light current public terminal GND and capacitor C 31 1 ends respectively, and pin 4 connects the other end of resistance R 32, capacitor C 31 and the input end of microprocessor (5) respectively; The other end of resistance R 31 connects power end PVCC, and the other end of resistance R 32 connects power supply U.
5. AC blower fan according to claim 1 opens circuit and the testing circuit of short circuit, it is characterized in that described blower fan short-circuit detecting circuit (4) comprises voltage stabilizing diode ZD41, resistance R 41, resistance R 42, optocoupler U41 and capacitor C 41, wherein the cathode terminal of voltage stabilizing diode ZD41 links to each other with power end PVCC, and anode tap links to each other with an end of resistance R 41; The pin 1 of optocoupler U41 connects the other end of resistance R 41, pin 2 connects forceful electric power common port PGND, pin 3 connects an end of light current public terminal GND and capacitor C 41 respectively, pin 4 connects an end of resistance R 42, the other end of capacitor C 41 and the input end of microprocessor (5) respectively, and the other end of resistance R 42 connects power supply U.
6. open circuit according to claim 4 or 5 described AC blower fans and the testing circuit of short circuit, it is characterized in that described optocoupler U31 and optocoupler U41 are the optocoupler that possesses switching characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205796274U CN201845061U (en) | 2010-10-28 | 2010-10-28 | Circuit breaking and short circuit detection circuit of alternating current fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205796274U CN201845061U (en) | 2010-10-28 | 2010-10-28 | Circuit breaking and short circuit detection circuit of alternating current fan |
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| Publication Number | Publication Date |
|---|---|
| CN201845061U true CN201845061U (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205796274U Expired - Fee Related CN201845061U (en) | 2010-10-28 | 2010-10-28 | Circuit breaking and short circuit detection circuit of alternating current fan |
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| CN (1) | CN201845061U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343713A (en) * | 2014-01-20 | 2015-02-11 | 上海新时达电气股份有限公司 | Failure detection circuit of alternating current fan |
| CN104375541A (en) * | 2014-12-09 | 2015-02-25 | 淮海工学院 | All-intelligent temperature and humidity controller |
| CN105065313A (en) * | 2015-08-07 | 2015-11-18 | 深圳市三巨电机有限公司 | Alternating and direct current fan control device |
| CN109884374A (en) * | 2019-01-30 | 2019-06-14 | 成都图灵创想科技有限责任公司 | A kind of straight-bar machines voltage detecting circuit |
-
2010
- 2010-10-28 CN CN2010205796274U patent/CN201845061U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343713A (en) * | 2014-01-20 | 2015-02-11 | 上海新时达电气股份有限公司 | Failure detection circuit of alternating current fan |
| CN104343713B (en) * | 2014-01-20 | 2016-05-25 | 上海新时达电气股份有限公司 | The failure detector circuit of ac fan |
| CN104375541A (en) * | 2014-12-09 | 2015-02-25 | 淮海工学院 | All-intelligent temperature and humidity controller |
| CN105065313A (en) * | 2015-08-07 | 2015-11-18 | 深圳市三巨电机有限公司 | Alternating and direct current fan control device |
| CN105065313B (en) * | 2015-08-07 | 2017-08-08 | 深圳市三巨电机有限公司 | A kind of alternating current-direct current fan control device |
| CN109884374A (en) * | 2019-01-30 | 2019-06-14 | 成都图灵创想科技有限责任公司 | A kind of straight-bar machines voltage detecting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING Co.,Ltd. Assignor: Midea Group Contract record no.: 2012440000405 Denomination of utility model: Open circuit and short circuit detection circuits of alternating current fan Granted publication date: 20110525 License type: Exclusive License Record date: 20120712 |
|
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 beautiful road, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Midea Group |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20181028 |