CN104101064A - Indoor and outdoor unit power source wiring error protection device used for variable frequency air conditioner - Google Patents
Indoor and outdoor unit power source wiring error protection device used for variable frequency air conditioner Download PDFInfo
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- CN104101064A CN104101064A CN201410281598.6A CN201410281598A CN104101064A CN 104101064 A CN104101064 A CN 104101064A CN 201410281598 A CN201410281598 A CN 201410281598A CN 104101064 A CN104101064 A CN 104101064A
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Abstract
The invention discloses an indoor and outdoor unit power source wiring error protection device used for a variable frequency air conditioner. Live lines, zero lines and SIG wires of an indoor unit side and an outdoor unit side are correspondingly connected and form a communication electric current loop; the outdoor unit side is isolated by a photoelectric coupler and then is connected with a serial communication interface of an outdoor electronic control MCU (Microprogrammed Control Unit) by a transistor drive circuit; the outdoor electronic control MCU samples a supply voltage value which is rectified by rectification bridge rectifiers. When electrification is carried out, an outdoor unit control board, namely the outdoor electronic control MCU automatically samples the supply voltage value of a power supply, and whether the connection order of the connecting wires of the outdoor unit control board is wrong, namely whether the live wires, the zero wires and the SIG wires are connected in disorder is judged according to the sampled supply voltage value; when the voltage value which is received by the outdoor unit control board is smaller than a judgment threshold value, the wrong wire connection is judged, the outdoor unit control board immediately stops the communication with an indoor unit, the load of an outdoor unit is stopped, and a fault is reported simultaneously.
Description
Technical field
The present invention relates to the indoor and outdoor machine power supply wiring error protection device of a kind of convertible frequency air-conditioner, particularly a kind of convertible frequency air-conditioner.
Background technology
At present, the indoor set of convertible frequency air-conditioner, the communication between off-premises station have been used the structure of electric current loop to power, and the connecting line between indoor set, off-premises station comprises zero-power line, live wire and SIG line, must correspondingly be connected.Generally, in the programme-control of indoor set, off-premises station not for detection of the connecting line device of wrong whether, so need operating personnel to carry out the line order of artificial judgment wiring, once if the connecting line hybrid junction between indoor set, off-premises station, with regard to the consequence that easily causes the control panel of convertible frequency air-conditioner to burn, severe patient also can fire hazard.
Summary of the invention
Object of the present invention aims to provide a kind of indoor and outdoor machine power supply wiring error protection device of simple and reasonable, convertible frequency air-conditioner that security performance is good, to overcome weak point of the prior art.
By the indoor and outdoor machine power supply wiring error protection device of a kind of convertible frequency air-conditioner of this object design; live wire, zero line, the SIG line of indoor pusher side and outdoor pusher side are corresponding to be connected and to form communication current ring; it is characterized in that outdoor pusher side isolates by photoelectrical coupler; and then be connected with the serial communication interface of outdoor automatically controlled MCU through transistor drive circuit, the supply voltage value of outdoor automatically controlled MCU sampling after rectifier bridge stack rectification.
Further, the circuit that described outdoor automatically controlled MCU samples to supply voltage value comprises rectifier bridge stack and divider resistance circuit.
Off-premises station control panel in the present invention, outdoor automatically controlled MCU namely, when powering on, automatically the sample supply voltage value of power supply of the MCU of off-premises station control panel, according to the supply voltage value sampling, judge the line of off-premises station control panel, namely live wire, zero line, SIG line hybrid junction whether; The magnitude of voltage that connects sampling when off-premises station control panel is less than judgment threshold Voltage_Min, is judged as wrong line, off-premises station control panel by stop immediately with indoor set between communicate by letter, and stop off-premises station load, with Times fault.
The present invention can automatically detect the wiring between indoor set, off-premises station; at the circuit of indoor pusher side, set up divider resistance circuit and carried out supply voltage sampling; can after powering on, wrong line protect off-premises station control panel: if wiring is wrong, will cause the sampled voltage of off-premises station control panel to change.When off-premises station control panel is judged wrong line according to the variation of sampled voltage; will automatically stop with indoor pusher side between communicate by letter; program can be out of service; off-premises station is controlled blackboard newspaper fault simultaneously; play protection control panel and the effect of reminding installation personnel; the control panel that can prevent convertible frequency air-conditioner burns the situation generation of catching fire, and has simple and reasonable, the reasonable feature of security performance.
Accompanying drawing explanation
Fig. 1 is the control block diagram of one embodiment of the invention.
Fig. 2 is circuit connection diagram of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Referring to Fig. 1-Fig. 2; the indoor and outdoor machine power supply wiring error protection device of this convertible frequency air-conditioner; live wire, zero line, the SIG line of indoor pusher side and outdoor pusher side are corresponding to be connected and to form communication current ring; it is characterized in that outdoor pusher side isolates by photoelectrical coupler; and then be connected with the serial communication interface of outdoor automatically controlled MCU through transistor drive circuit, the supply voltage value of outdoor automatically controlled MCU sampling after rectifier bridge stack rectification.Be used for judging whether the order of connection has fault.
In the present embodiment, the circuit that described outdoor automatically controlled MCU samples to supply voltage value comprises rectifier bridge stack and divider resistance circuit.
Divider resistance circuit is reduced to by the DC voltage dividing potential drop after rectification the magnitude of voltage that outdoor automatically controlled MCU can Direct Sampling.
Outdoor automatically controlled MCU realizes the control of off-premises station all functions, the supply voltage value obtaining from divider resistance circuit is being sampled, and make corresponding processing, if magnitude of voltage is lower than threshold value Voltage_Min, be judged as wiring error, by communicating by letter between pusher side outside close chamber and indoor pusher side, with Times fault, close off-premises station load; If the supply voltage value of sampling is more than or equal to threshold value Voltage_Min, be judged as wiring correct, communicating by letter between the outer pusher side of priming chamber and indoor pusher side, the action command that off-premises station side joint is received indoor pusher side transmission enters normal operation.
Indoor automatically controlled MCU is for indoor pusher side is controlled, and indoor automatically controlled MCU detects the normal rear action command that sends of supply voltage at outdoor automatically controlled MCU.
The triode drive circuit of outdoor pusher side is used for driving photoelectrical coupler, realizes the isolation of light current forceful electric power.Communication current ring is directly from live wire, zero line power taking, after over commutation for the power supply of the optocoupler of communicating by letter.SIG line is used for transmitting communication data.
Claims (2)
1. the indoor and outdoor machine power supply wiring error protection device of a convertible frequency air-conditioner; live wire, zero line, the SIG line of indoor pusher side and outdoor pusher side are corresponding to be connected and to form communication current ring; it is characterized in that outdoor pusher side isolates by photoelectrical coupler; and then be connected with the serial communication interface of outdoor automatically controlled MCU through transistor drive circuit, the supply voltage value of outdoor automatically controlled MCU sampling after rectifier bridge stack rectification.
2. the indoor and outdoor machine power supply wiring error protection device of convertible frequency air-conditioner according to claim 1, is characterized in that the circuit that described outdoor automatically controlled MCU samples to supply voltage value comprises rectifier bridge stack and divider resistance circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281598.6A CN104101064A (en) | 2014-06-21 | 2014-06-21 | Indoor and outdoor unit power source wiring error protection device used for variable frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281598.6A CN104101064A (en) | 2014-06-21 | 2014-06-21 | Indoor and outdoor unit power source wiring error protection device used for variable frequency air conditioner |
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| CN104101064A true CN104101064A (en) | 2014-10-15 |
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| CN201410281598.6A Pending CN104101064A (en) | 2014-06-21 | 2014-06-21 | Indoor and outdoor unit power source wiring error protection device used for variable frequency air conditioner |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979817A (en) * | 2015-06-30 | 2015-10-14 | 青岛海尔科技有限公司 | Household air-conditioning indoor-outdoor communication failure-proof protection circuit |
| CN107525218A (en) * | 2017-07-27 | 2017-12-29 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| CN107895943A (en) * | 2017-10-16 | 2018-04-10 | 霍尼韦尔环境自控产品（天津）有限公司 | Device and its control method with wiring protection function |
| CN110154676A (en) * | 2019-05-05 | 2019-08-23 | 广东美的制冷设备有限公司 | Air-conditioning indoor and outdoor machine Wiring detection method, air condition with camion and its power supply unit |
| CN110470037A (en) * | 2019-08-01 | 2019-11-19 | 广东美的制冷设备有限公司 | Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line |
| CN112798983A (en) * | 2020-12-30 | 2021-05-14 | 珠海格力电器股份有限公司 | Method and device for detecting connecting line of internal and external machines |
| CN114659230A (en) * | 2022-04-18 | 2022-06-24 | 珠海格力电器股份有限公司 | Zero-live line communication control device of air conditioner, control method of zero-live line communication control device and air conditioner |
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| JPH10332761A (en) * | 1997-05-29 | 1998-12-18 | Toshiba Corp | Connecting condition judging method and air conditioner provided with means for performing this method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979817B (en) * | 2015-06-30 | 2019-02-22 | 青岛海尔科技有限公司 | A kind of anti-error protection circuit of domestic air conditioning indoor and outdoor communication |
| CN104979817A (en) * | 2015-06-30 | 2015-10-14 | 青岛海尔科技有限公司 | Household air-conditioning indoor-outdoor communication failure-proof protection circuit |
| CN107525218A (en) * | 2017-07-27 | 2017-12-29 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| CN107525218B (en) * | 2017-07-27 | 2019-10-18 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| CN107895943A (en) * | 2017-10-16 | 2018-04-10 | 霍尼韦尔环境自控产品（天津）有限公司 | Device and its control method with wiring protection function |
| CN107895943B (en) * | 2017-10-16 | 2019-12-03 | 霍尼韦尔环境自控产品（天津）有限公司 | Device and its control method with wiring protection function |
| CN110154676B (en) * | 2019-05-05 | 2020-12-11 | 广东美的制冷设备有限公司 | Air conditioner indoor and outdoor unit wiring detection method, vehicle-mounted air conditioner and power supply device thereof |
| CN110154676A (en) * | 2019-05-05 | 2019-08-23 | 广东美的制冷设备有限公司 | Air-conditioning indoor and outdoor machine Wiring detection method, air condition with camion and its power supply unit |
| CN110470037A (en) * | 2019-08-01 | 2019-11-19 | 广东美的制冷设备有限公司 | Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line |
| CN110470037B (en) * | 2019-08-01 | 2021-06-22 | 广东美的制冷设备有限公司 | Anti-reverse connection circuit, method and device for power line of variable frequency air conditioner and air conditioner |
| CN112798983A (en) * | 2020-12-30 | 2021-05-14 | 珠海格力电器股份有限公司 | Method and device for detecting connecting line of internal and external machines |
| CN112798983B (en) * | 2020-12-30 | 2022-03-01 | 珠海格力电器股份有限公司 | Method and device for detecting connecting line of internal and external machines |
| CN114659230A (en) * | 2022-04-18 | 2022-06-24 | 珠海格力电器股份有限公司 | Zero-live line communication control device of air conditioner, control method of zero-live line communication control device and air conditioner |
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Application publication date: 20141015 |