CN201118218Y - Controller for preventing alternating current contactor adhesion - Google Patents
Controller for preventing alternating current contactor adhesion Download PDFInfo
- Publication number
- CN201118218Y CN201118218Y CNU2007200558672U CN200720055867U CN201118218Y CN 201118218 Y CN201118218 Y CN 201118218Y CN U2007200558672 U CNU2007200558672 U CN U2007200558672U CN 200720055867 U CN200720055867 U CN 200720055867U CN 201118218 Y CN201118218 Y CN 201118218Y
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- contactor
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- unloading
- controller
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Abstract
The utility model relates to the technical field of electric control, in particular to a controller for preventing an alternating contactor from adhering and causing failure, which comprises a voltage detection module, an MCU module, an unloading and alarming control module and a direct current power module; wherein, the detection input end of the voltage detection module is used for connecting the front end and the rear end of the direct current contactor, the signal output end of the voltage detection module is connected with a signal collection pin corresponding to the MCU module, the signal input end of the unloading and alarming control module is connected with a control signal output pin, the output control end of the unloading and alarming control module is used for connecting a superior controllable switch and an alarming device, the input end of the direct current power module is used for connecting alternating power, and the output end of the direct current power module is connected with the power supply ends of the MCU module and the unloading and alarming control module. The controller can effectively prevent the device failure caused by the adhesion of the alternating current contactor, thus resulting in more stable and more reliable operation of the whole device.
Description
Technical field
The utility model relates to the Electrical Control Technology field, relates in particular to can prevent the A.C. contactor adhesion and the controller of initiating failure.
Background technology
A.C. contactor is as the cut-offfing and control circuit of electric power, and its application is very extensive, for example, in existing central air conditioner system, the compressor of most units or the unlatching of blower fan and close and all be to use A.C. contactor to control.Yet; also there is the defective on some functions in A.C. contactor commonly used: owing to use cause aging for a long time; the perhaps reason of A.C. contactor itself; through regular meeting the situation of A.C. contactor adhesion taking place, cause the air-conditioning unit to the stopping operation and can't carry out of compressor or blower fan, causes compressor or the blower fan for a long time can not controlled work; consume equipment; the waste resource also can cause fire when serious, burns unit.
Yet situation about sticking together for this A.C. contactor does not at present also have special technology to solve, and is not handled usually, so exist certain potential safety hazard.
The utility model content
The purpose of this utility model is to remedy shortcoming of the prior art, and a kind of controller that prevents the A.C. contactor adhesion is provided, and by being used with common A.C. contactor, can detect whether adhesion of A.C. contactor, if adhesion and controlling automatically,
The purpose of this utility model is realized by following technical scheme:
A kind of controller that prevents the A.C. contactor adhesion, it is characterized in that, comprise voltage detection module, the MCU module, unloading and alarm control module, and DC power supplier, the detection input of voltage detection module is in order to connect the front end and the rear end of A.C. contactor, the signal output part of voltage detection module is connected with MCU module corresponding signal collection pin, the signal input part of unloading and alarm control module is connected with the control signal output pin of MCU module, the output control terminal of unloading and alarm control module is in order to connect a higher level's gate-controlled switch and a warning device, the input of DC power supplier is in order to connect AC power, and the output of DC power supplier is connected with the feeder ear of MCU module with unloading and alarm control module.
The controller that prevents the A.C. contactor adhesion that the utility model provides is by detecting the voltage of A.C. contactor rear and front end, and detection signal imported the MCU module, thereby can judge in real time whether A.C. contactor has adhesion, MCU module and according to judging structure, if for the adhesion state, then send and report to the police and the Unloading Control signal, carry out respective operations by unloading and alarm module.The utility model can prevent from the apparatus failure that caused by the A.C. contactor adhesion from whole electrical equipment to be stablized more and reliability service effectively.
Description of drawings
Fig. 1 is the schematic diagram that traditional A.C. contactor uses separately;
Fig. 2 is the schematic diagram that the controller that prevents the A.C. contactor adhesion that provides of the utility model and A.C. contactor are used;
Fig. 3 is the composition frame chart of the controller that prevents the A.C. contactor adhesion that provides of the utility model;
Fig. 4 is the circuit diagram of an embodiment of voltage detection module;
Fig. 5 is the circuit diagram of an embodiment of MCU module;
Fig. 6 is the circuit diagram of an embodiment of unloading and alarm control module;
Fig. 7 is the circuit diagram of an embodiment of DC power supplier.
Embodiment
As shown in Figure 3, the controller that prevents the A.C. contactor adhesion that the utility model provides comprises: voltage detection module, the MCU module, unloading and alarm control module, and DC power supplier, wherein, the detection input of voltage detection module is in order to connect the front end and the rear end of A.C. contactor, the signal output part of voltage detection module is connected with MCU module corresponding signal collection pin, the signal input part of unloading and alarm control module is connected with the control signal output pin of MCU module, the output control terminal of unloading and alarm control module is in order to connect a higher level's gate-controlled switch and a warning device, the input of DC power supplier is in order to connect AC power, and the output of DC power supplier is connected with the feeder ear of MCU module with unloading and alarm control module.
The function of each module and the embodiment of each module are described in detail in detail below.
See also Fig. 4, voltage detection module comprises A.C. contactor front end voltage detecting circuit and A.C. contactor rear end voltage detecting circuit.Described A.C. contactor front end voltage detecting circuit is made of rectification circuit and optical coupling isolation circuit, among the figure, the X7 end is linked into the control end of A.C. contactor, when X7 has the alternating current of 220V, at positive half period, diode D14 conducting, diode D13 ends, electric current flows back to by resistance R 14, diode D14, optocoupler U3, resistance R 10, and charges on electrochemical capacitor C7; When X7 had the alternating current of 220V, at negative half-cycle, diode D14 ended, diode D13 conducting, and electric current flows back to by resistance R 10, diode D13, resistance R 14, and electrochemical capacitor C7 goes up electric charge and keeps; So just formed the lumination of light emitting diode of U3, the right-hand member conducting, the PRE1 signal is exactly a low level, when in like manner not having alternating current on X7, the light-emitting diode of optocoupler is not luminous, not conducting of right-hand member, the PRE1 end is because there is pull-up resistor R18 to 5V (in conjunction with Fig. 6), so be exactly high level.Whether the PRE1 end is connected with the I/O pin of MCU module chip, therefore just can detect X7 end 220V alternating current and exist.Described A.C. contactor rear end voltage detecting circuit is made of the two-way circuit identical with A.C. contactor front end voltage detecting circuit, as shown in Figure 4, rear end at A.C. contactor, adopt two terminals of X11, X2 to detect the state of L1, L2 (in conjunction with Fig. 2), as long as 220V voltage is arranged above one of them, BE1 will be a low level, has only two all not have 220V voltage, the BE1 end is because there is pull-up resistor R19 to 5V (in conjunction with Fig. 6), so just can be high level.So far, just can detect the signal of A.C. contactor front end and rear end reliably by voltage detection module, data have been gathered in the judgement of making whether adhesion for later MCU modular program like this.
See also Fig. 5, the MCU module adopts the PIC12F675 cake core, and this chip has eight pins, and the 1st pin is a dc power supply terminal, and the 8th pin is an earth terminal, and the 2nd, 3,4,5,6,7 pins are I/O (I/O) end.In the present embodiment, PRE1 (in conjunction with Fig. 4) end of A.C. contactor front end voltage detecting circuit is connected with the 2nd pin of PIC12F675 cake core, and BE1 (in conjunction with Fig. 4) end of A.C. contactor rear end voltage detecting circuit is connected with the 4th pin of PIC12F675 cake core.The MCU module is integrated with software program, the MCU modular program just can learn by judging PRE1 signal and BE1 signal whether A.C. contactor adhesion has taken place, if promptly detect the PRE1 signal is corresponding open command, and the BE1 signal still represents to have at least one the tunnel to be 220V voltage, such testing result is if certain time (as 30 seconds) judges that then this A.C. contactor has been in the adhesion state.In the present embodiment, the 6th pin of PIC12F675 cake core, the 7th pin behind MCU module discriminatory analysis, generate control signal as output pin in case of necessity, and the 6th pin, the 7th pin are promptly as control signal being exported to unloading and alarm control module.
See also Fig. 6, the circuit part that unloading and alarm control module comprise the ULN2003 chip and be used to control the circuit part of higher level's gate-controlled switch and be used to control warning device.Wherein, the circuit part that is used to control higher level's gate-controlled switch is made of relay K 1, relay protection circuit D1 and RC circuit, and the circuit part that is used to control warning device is made of relay K 4, relay protection circuit D4.Among the figure, diode D1, diode D4 are fly-wheel diode, are used for protection relay K1, relay K 4 respectively; Relay K 1 is controlled the work of higher level's gate-controlled switch by the weak electric signal of process, and relay K 4 is used for importing a 220V signal and carries out the demonstration of A.C. contactor adhesion alarm signal for warning device (for example other mainboard).With signal RLY1 is example, MCU module chip U1 has exported the signal RLY1 of Transistor-Transistor Logic level, when this signal is " 0 " by chip U2 inversion signal RY1 during for logical one, the port one of relay K 1, port 2 conductings, the port 3 of relay K 1, port 4 adhesives, the AC-L that is connected with relay K 1 port 3 has just obtained the driving voltage that 220V exchanges like this by capacitance-resistance RC1 and zero line interface AC-N conducting between relay K 1 port 3 and AC-N.As long as higher level's gate-controlled switch (for example another A.C. contactor) terminates at the port 3 of relay K 1, the other end is connected on zero line interface AC-N, and this higher level's gate-controlled switch just can be according to the power supply in signal RY1 control downstream.If the signal of signal RLY1 is a logical zero, the port 3 of relay K 1 just is equivalent to unsettled, and two-port valve outage just is just higher level's gate-controlled switch is for turn-offing.The operation principle of circuit part that is used to control warning device is similar, when the RLY4 signal that sends when the MCU module is logical one, RY4 is a logical zero by chip U2 inversion signal, the port one of relay K 1, port 2 conductings, the port 3 of relay K 1, port 4 adhesives, part is connected between X6 and the X16 as long as will report to the police, just can realize warning function.
See also Fig. 7, DC power supplier is made up of ac filter circuit, AC transformer, rectifier bridge, voltage stabilizing circuit, DC filtering circuit.The single-phase 220V voltage of AC power carries out filtering through ac filter circuit, sends into the AC transformer transformation then after obtain stable 5V working power after over commutation bridge, voltage stabilizing circuit and the arrangement of DC filtering circuit.The use of piezo-resistance in the ac filter circuit has improved EMC (electromagnetic compatibility) performance of entire controller.As shown in the figure, 220V exchanges single-phase electricity AC-L, AC-N and carries out filtering through piezo-resistance R2, again by AC transformer transformation T1, obtain the alternating current of a low pressure, form rectifier bridge by diode D24, diode D25, diode D26 and diode D27 this moment, AC rectification is become direct current, then through capacitor C 27 and capacitor C 31 filtering; After voltage stabilizing chip U8 voltage stabilizing,, form stable direct current 5V working power again through capacitor C 28 and capacitor C 12 filtering.
See also Fig. 2, the utility model in use, the detection input X7 of voltage detection module is connected with the control line of A.C. contactor front end, detection input X11, the X2 of voltage detection module are connected respectively with live wire L1, the L2 of A.C. contactor front end, the output control terminal of unloading and alarm control module is connected with a higher level's gate-controlled switch and a warning device, afterwards, with the input connection AC power of DC power supplier, just can work.The utility model is by detecting the voltage of A.C. contactor front and back end, and judges whether A.C. contactor has been in the adhesion state, if when determining that A.C. contactor has been in the adhesion state, just by unloading and alarm module cut-out upstream power supply and send alarm signal.
Above embodiment is the unrestricted the technical solution of the utility model in order to explanation only.For example, voltage detection module, MCU module, unloading and alarm control module, and the concrete enforcement circuit of DC power supplier can also be other form, the any modification or partial replacement that does not promptly break away from the utility model spirit and scope all should be encompassed in the middle of the claim scope of the present utility model.In addition, for two-shipper or multimachine (corresponding two or more A.C. contactors) system, as long as corresponding many voltage detecting circuits are provided, and corresponding setting of MCU modular program work got final product, this kind situation is not taken off the utility model protection range equally.
Claims (5)
1. controller that prevents the A.C. contactor adhesion, it is characterized in that, comprise voltage detection module, the MCU module, unloading and alarm control module, and DC power supplier, the detection input of voltage detection module is in order to connect the front end and the rear end of A.C. contactor, the signal output part of voltage detection module is connected with MCU module corresponding signal collection pin, the signal input part of unloading and alarm control module is connected with the control signal output pin of MCU module, the output control terminal of unloading and alarm control module is in order to connect a higher level's gate-controlled switch and a warning device, the input of DC power supplier is in order to connect AC power, and the output of DC power supplier is connected with the feeder ear of MCU module with unloading and alarm control module.
2. the controller that prevents the A.C. contactor adhesion as claimed in claim 1, it is characterized in that, voltage detection module comprises A.C. contactor front end voltage detecting circuit and A.C. contactor rear end voltage detecting circuit, described A.C. contactor front end voltage detecting circuit is made of rectification circuit and optical coupling isolation circuit, and described A.C. contactor rear end voltage detecting circuit is made of the two-way circuit identical with A.C. contactor front end voltage detecting circuit.
3. the controller that prevents the A.C. contactor adhesion as claimed in claim 1 is characterized in that, the MCU module adopts the PIC12F675 cake core.
4. the controller that prevents the A.C. contactor adhesion as claimed in claim 1; it is characterized in that; the circuit part that unloading and alarm control module comprise the ULN2003 chip and be used to control the circuit part of higher level's gate-controlled switch and be used to control warning device; the circuit part that is used to control higher level's gate-controlled switch is made of relay K 1, relay protection circuit D1 and RC circuit, and the circuit part that is used to control warning device is made of relay K 4, relay protection circuit D4.
5. the controller that prevents the A.C. contactor adhesion as claimed in claim 1 is characterized in that, DC power supplier is made up of ac filter circuit, AC transformer, rectifier bridge, voltage stabilizing circuit, DC filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200558672U CN201118218Y (en) | 2007-08-21 | 2007-08-21 | Controller for preventing alternating current contactor adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200558672U CN201118218Y (en) | 2007-08-21 | 2007-08-21 | Controller for preventing alternating current contactor adhesion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118218Y true CN201118218Y (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200558672U Expired - Lifetime CN201118218Y (en) | 2007-08-21 | 2007-08-21 | Controller for preventing alternating current contactor adhesion |
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| Country | Link |
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| CN (1) | CN201118218Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569799A (en) * | 2013-10-24 | 2015-04-29 | Ls产电株式会社 | Apparatus and method for diagnosing malfunction of high voltage relay device |
| CN104569796A (en) * | 2013-10-17 | 2015-04-29 | 珠海格力电器股份有限公司 | Contact fault monitoring method and device |
| CN104599901A (en) * | 2015-02-03 | 2015-05-06 | 珠海格力电器股份有限公司 | Detection circuit used for contactor |
| CN104764164A (en) * | 2015-04-09 | 2015-07-08 | 宁波奥克斯电气有限公司 | Method for judging whether alternating-current contactor of air conditioner is adhered or not |
| CN105048421A (en) * | 2015-09-01 | 2015-11-11 | 江门市甜的电器有限公司 | Switch contact adhesion fault protection circuit |
| CN105332902A (en) * | 2015-12-01 | 2016-02-17 | 珠海格力电器股份有限公司 | Compressor relay adhesion protection method, compressor relay adhesion protection device and air conditioner |
| CN106019065A (en) * | 2016-05-04 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioner compressor contactor adhesion detection method, system and device and air conditioner |
| CN106405259A (en) * | 2015-07-29 | 2017-02-15 | 比亚迪股份有限公司 | Method and apparatus for sintering detection of motor contactor |
| CN112146253A (en) * | 2020-09-23 | 2020-12-29 | 海信（山东）空调有限公司 | Air conditioner and compressor control method thereof |
-
2007
- 2007-08-21 CN CNU2007200558672U patent/CN201118218Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569796B (en) * | 2013-10-17 | 2017-09-22 | 珠海格力电器股份有限公司 | A kind of contact fault monitoring method and device |
| CN104569796A (en) * | 2013-10-17 | 2015-04-29 | 珠海格力电器股份有限公司 | Contact fault monitoring method and device |
| CN104569799B (en) * | 2013-10-24 | 2018-03-06 | Ls产电株式会社 | For the apparatus and method for the failure for diagnosing high-voltage relay equipment |
| US9606161B2 (en) | 2013-10-24 | 2017-03-28 | Lsis Co., Ltd. | Apparatus and method for diagnosing malfunction of high voltage relay device |
| CN104569799A (en) * | 2013-10-24 | 2015-04-29 | Ls产电株式会社 | Apparatus and method for diagnosing malfunction of high voltage relay device |
| CN104599901B (en) * | 2015-02-03 | 2017-05-10 | 珠海格力电器股份有限公司 | Detection circuit used for contactor |
| CN104599901A (en) * | 2015-02-03 | 2015-05-06 | 珠海格力电器股份有限公司 | Detection circuit used for contactor |
| CN104764164A (en) * | 2015-04-09 | 2015-07-08 | 宁波奥克斯电气有限公司 | Method for judging whether alternating-current contactor of air conditioner is adhered or not |
| CN104764164B (en) * | 2015-04-09 | 2017-08-15 | 宁波奥克斯电气股份有限公司 | Judge the method for the whether viscous connection of A.C. contactor of air conditioner |
| CN106405259A (en) * | 2015-07-29 | 2017-02-15 | 比亚迪股份有限公司 | Method and apparatus for sintering detection of motor contactor |
| CN106405259B (en) * | 2015-07-29 | 2019-05-17 | 比亚迪股份有限公司 | The sintering detection method and device of motor contactor |
| CN105048421A (en) * | 2015-09-01 | 2015-11-11 | 江门市甜的电器有限公司 | Switch contact adhesion fault protection circuit |
| CN105048421B (en) * | 2015-09-01 | 2019-01-08 | 江门市甜的电器有限公司 | A kind of switch contact adhesion fault protection circuit |
| CN105332902A (en) * | 2015-12-01 | 2016-02-17 | 珠海格力电器股份有限公司 | Compressor relay adhesion protection method, compressor relay adhesion protection device and air conditioner |
| CN106019065A (en) * | 2016-05-04 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioner compressor contactor adhesion detection method, system and device and air conditioner |
| CN112146253A (en) * | 2020-09-23 | 2020-12-29 | 海信（山东）空调有限公司 | Air conditioner and compressor control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080917 |