CN103837821B - The communication detecting method of a kind of current-loop communication circuit and system - Google Patents
The communication detecting method of a kind of current-loop communication circuit and system Download PDFInfo
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- CN103837821B CN103837821B CN201210492680.4A CN201210492680A CN103837821B CN 103837821 B CN103837821 B CN 103837821B CN 201210492680 A CN201210492680 A CN 201210492680A CN 103837821 B CN103837821 B CN 103837821B
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Abstract
The present invention is applicable to air conditioning system communication detection field, it is provided that the communication detecting method of a kind of current-loop communication circuit and system.The present invention is by carrying out signal detection when the transmitting terminal optocoupler of the indoor or outside that control current-loop communication circuit turns on to the indoor of current-loop communication circuit or the receiving terminal of outside, if being continuously detected a pulse signal with fixed frequency in a prefixed time interval, then show that the mode of connection of current-loop communication circuit is made mistakes, air-conditioner can send the transmitting terminal optocoupler cut-off of indoor or the outside controlling current-loop communication circuit, concurrently it is out of order prompting, terminate the interprocess communication inside air conditioner chamber and between outside, thus reaching protection air conditioner room unit and off-premises station panel from the purpose damaged, solve the problem that existing current-loop communication circuit can cause the panel of indoor and outdoor both sides to be damaged when the mode of connection of indoor and outdoor both sides is made mistakes.
Description
Technical field
The invention belongs to air conditioning system communication detection field, particularly relate to communication detecting method and the system of a kind of current-loop communication circuit.
Background technology
Electric current loop communication is by detecting the size of electric current in current loop or whether there is On current and correspondingly realize a kind of method of communication, the capacity of resisting disturbance of current-loop communication circuit is strong, communication wire is few, so being widely used in Industry Control and home wiring control field, and indoor set and off-premises station are carried out Communication Control by the current commonly used above-mentioned current-loop communication circuit (current-loop communication circuit of single phase poaer supply as shown in Figure 1) of domestic air conditioning.Alternating current is carried out halfwave rectifier in indoor communicating circuit side by diode D3 by alternating current, the DC voltage of 24V is provided for electric current loop after being carried out voltage stabilizing process by Zener diode ZD1 again, indoor communicating circuit side and outdoor communicating circuit side open communication work immediately when powering on, now optocoupler (IC7 and the IC8) conducting of the outside of the optocoupler (IC5 and IC6) of the indoor of current-loop communication circuit and current-loop communication circuit, then electric current loop connects therewith, 24V voltage forms current lead-through in current loop, and the optocoupler control chip of the optocoupler control chip of indoor set and off-premises station is able to the receiving terminal RX2 of the receiving terminal RX1 by indoor communicating circuit side and outdoor communicating circuit side and high level voltage detected；If communication is closed, due to the optocoupler cut-off in indoor communicating circuit side or outdoor communicating circuit side, then current loop is accordingly turned off and passes through without On current, and the optocoupler control chip of the optocoupler control chip of indoor set and off-premises station is able to the receiving terminal RX2 of the receiving terminal RX1 by indoor communicating circuit side and outdoor communicating circuit side and low level voltage detected.Therefore, the transmission of communication data is realized by the method for above-mentioned detection low and high level.
For the air-conditioning of single phase poaer supply supply, as long as 4 lines of its current-loop communication circuit (including phase line L, zero line N, connection S and ground wire GND) can realize, the wiring diagram of its indoor and outdoor both sides is as shown in Figure 2；Air-conditioning for three phase mains supply, its current-loop communication circuit then needs 6 lines (including a phase power line A, two-phase power line B, three-phase power line C, zero line N, connection S and ground wire GND) just can realize, and the wiring diagram of its indoor and outdoor both sides is as shown in Figure 3.
Owing to the mode of connection of the current indoor and outdoor both sides of major part air-conditioning is by being that producer provides, its every connecting line has corresponding mark, and the junction block of the indoor apparatus of air conditioner of correspondence and off-premises station also has the mark of correspondence, the mark having only to the mark according to connecting line and junction block when installing air-conditioning connects, so, wiring error rate is non-normally low.
But for the air-conditioning (such as ceiling machine) that part mounting means is comparatively special, owing to its mounting means is special, and producer does not provide the connecting line of indoor and outdoor both sides, need provided by distributors when buying air-conditioning or bought connecting line by user voluntarily, and owing to these connecting lines not identifying, so be easy to wrong line when indoor set and off-premises station are attached, make indoor and outside connectivity port can not one_to_one corresponding, and then cause that the panel of indoor apparatus of air conditioner and off-premises station is damaged.Such as, Wrong wiring way as shown in Figure 4 and Figure 5, owing to phase line L or three-phase power line C is connected to connection S, then the voltage effective value between zero line N and connection S end reaches 220V, this magnitude of voltage is considerably beyond aforesaid 24V, so, for outside, when optocoupler control chip controls optocoupler IC8 conducting, owing to the voltage between zero line N and connection S increases severely, then the On current of optocoupler IC8 is greatly increased, exceed its turn on current value that can bear, optocoupler IC8 is made to damage at short notice, in like manner indoor optocoupler IC6 also can be damaged because of above-mentioned reason, and then cause that damaging occurs in the panel of indoor and outdoor both sides.
Summary of the invention
It is an object of the invention to provide the communication detecting method of a kind of current-loop communication circuit, it is intended to solve the problem that existing current-loop communication circuit can cause the panel of indoor and outdoor both sides to be damaged when the mode of connection of indoor and outdoor both sides is made mistakes.
The present invention is achieved in that the communication detecting method of a kind of current-loop communication circuit, and described communication detecting method comprises the following steps:
A. control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside when power-on of air conditioner, initialize and preset stored detection number of times data in memory space, and time delay very first time interval；
B. the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside are controlled, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value, it is then perform step C, no, then perform step H；
C. judge whether the indoor of described current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that described frequency is predeterminated frequency reference value in the second interval, be, then perform step D, no, then jump to described step B；
D. control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data preset in memory space；
E. judge that whether described detection number of times data are equal to preset times threshold value, are, then perform step F, no, then perform step G；
F. send fault cues, terminate the interprocess communication inside air conditioner chamber and between outside；
G. time delay the 3rd interval jump to described step B；
H. control to open interprocess communication with outside inside air conditioner chamber.
Present invention also offers the communication detection system of a kind of current-loop communication circuit, described communication detection system includes:
Power-up initializing module, optocoupler control and judge module, signal export judge module, redirect module, optocoupler controls to redirect module, system control module and memory module with counting module, counting judge module, fault processing module, time delay；
The transmitting terminal optocoupler cut-off of described power-up initializing module indoor or outside for controlling current-loop communication circuit when power-on of air conditioner, initializes stored detection number of times data in described memory module time delay very first time interval；
Described optocoupler controls and judge module is for behind described power-up initializing module time delay very first time interval, control the transmitting terminal optocoupler conducting of the indoor of current-loop communication circuit or outside, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value；
Described signal output judge module is for when the judged result of the control of described optocoupler and judge module is for being, it is judged that whether the indoor of described current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that described frequency is predeterminated frequency reference value in the second interval；
The described module that redirects is for when the judged result of described signal output judge module is no, jumping to described optocoupler and control and judge module；
Described optocoupler controls with counting module for when the judged result of described signal output judge module is for being, controlling the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data in described memory module；
Described counting judge module is used for judging that whether described detection number of times data are equal to preset times threshold value；
Described fault processing module, for when the judged result of described counting judge module is for being, sending fault cues, terminates the interprocess communication inside air conditioner chamber and between outside；
Described time delay redirects module for when the judged result of described counting judge module is no, and time delay the 3rd interval also jumps to the control of described optocoupler and judge module；
When described system control module is no for the judged result controlled with judge module when described optocoupler, control to open interprocess communication with outside inside air conditioner chamber；
Described memory module is used for storing described detection number of times data.
The present invention is by carrying out signal detection when the transmitting terminal optocoupler of the indoor or outside that control current-loop communication circuit turns on to the indoor of current-loop communication circuit or the receiving terminal of outside, if being continuously detected a pulse signal with fixed frequency in a prefixed time interval, then show that the mode of connection of current-loop communication circuit is made mistakes, air-conditioner can control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, concurrently it is out of order prompting, terminate the interprocess communication inside air conditioner chamber and between outside, thus reaching protection air conditioner room unit and off-premises station panel from the purpose damaged, solve the problem that existing current-loop communication circuit can cause the panel of indoor and outdoor both sides to be damaged when the mode of connection of indoor and outdoor both sides is made mistakes.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of existing current-loop communication circuit；
Fig. 2 is the conventional connections figure of the indoor and outdoor both sides of the air-conditioning of existing single phase poaer supply supply；
Fig. 3 is the conventional connections figure of the indoor and outdoor both sides of the air-conditioning of existing three phase mains supply；
Fig. 4 is the example error wiring diagram of the indoor and outdoor both sides of the air-conditioning of single phase poaer supply supply；
Fig. 5 is the example error wiring diagram of the indoor and outdoor both sides of the air-conditioning of three phase mains supply；
Fig. 6 be the communication detecting method of the current-loop communication circuit that the embodiment of the present invention provides realize flow process；
Fig. 7 is the structure chart of the communication detection system of the current-loop communication circuit that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention is by carrying out signal detection when the transmitting terminal optocoupler of the indoor or outside that control current-loop communication circuit turns on to the indoor of current-loop communication circuit or the receiving terminal of outside, if being continuously detected a pulse signal with fixed frequency in a prefixed time interval, then show that the mode of connection of current-loop communication circuit is made mistakes, air-conditioner can control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, concurrently it is out of order prompting, terminate the interprocess communication inside air conditioner chamber and between outside, thus reaching protection air conditioner room unit and off-premises station panel from the purpose damaged.
What Fig. 6 illustrated the communication detecting method of the current-loop communication circuit that the embodiment of the present invention provides realizes flow process, and for the ease of illustrating, illustrate only part related to the present invention, details are as follows:
In step S101, control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside when power-on of air conditioner, initialize and preset stored detection number of times data in memory space, and time delay very first time interval.
In embodiments of the present invention, the span at very first time interval is 0.5 second to 10 seconds；Time delay very first time interval is to carry out each step follow-up again after current-loop communication circuit powers on and stablizes ensureing, thus improving the accuracy of communication detection；Additionally, due to every time air-conditioner work on power all can with once new communication detection process, so the detection number of times data after initializing can be zero or other any number.
In step s 102, control the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value, it is, then perform step S103, no, then perform step S108.
Step S102 specifically includes following steps:
Control the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside；
Read signal from the receiving terminal of the indoor of current-loop communication circuit or outside, and judge that this signal whether be frequency is the pulse signal of predeterminated frequency reference value, be then perform step S103, no, then perform step S108.
In embodiments of the present invention, predeterminated frequency reference value is 50 hertz or 60 hertz.
In step s 103, it is judged that whether the indoor of current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that said frequencies is predeterminated frequency reference value in the second interval, are, then perform step S104, no, then jump to step S102.
In embodiments of the present invention, do not damage because crossing stream overlong time to take into account the accuracy ensureing detection and optocoupler, so the span of the second interval is set as 50 milliseconds to 2000 milliseconds.
In step S104, control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data preset in memory space.Step S104 specifically includes following steps:
Control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside；
Carry out after add-one operation, obtain new detection number of times data to the last detection number of times data preserved in default memory space, and the detection number of times data in default memory space are updated to new detection number of times data.
In embodiments of the present invention, owing to default memory space can preserve the initial value of detection number of times data when power-on of air conditioner initializes, so when carrying out the renewal that first time detects number of times data, the last detection number of times data preserved in above-mentioned default memory space are exactly aforesaid initial value.
In step S105, it is judged that whether preset the detection number of times data in memory space equal to preset times threshold value, be, then perform step S106, no, then perform step S107.
In embodiments of the present invention, the span of preset times threshold value is 1 to 20.
In step s 106, send fault cues, terminate the interprocess communication inside air conditioner chamber and between outside.
In step s 107, time delay the 3rd interval jump to step S102.Step S107 specifically includes following steps:
Timing also generates chronometric data；
Judge that whether chronometric data is equal to the 3rd interval, be then jump to step S102, no, then jump to described timing and generate the step of chronometric data.
Wherein, the span of the 3rd interval is 1 second to 15 seconds.
In step S108, control to open interprocess communication with outside inside air conditioner chamber.
Below in conjunction with instantiation, the communication detecting method of above-mentioned current-loop communication circuit is described further:
Assuming that the very first time is spaced apart 2 seconds, the second interval is 200 milliseconds, and the 3rd interval is 5 seconds, and predeterminated frequency reference value is 50 hertz (namely domestic electric main frequency values), and preset times threshold value is 3 times.When power-on of air conditioner, first control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, initializing the detection number of times data preset in memory space is 0, and after time delay 2 seconds, control the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside again, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency values is 50 hertz immediately, if not, then show that indoor and the outside wiring of current-loop communication circuit are correct, and control to open interprocess communication with outside inside air conditioner chamber, if, then continue to judge the whether persistently output 200 milliseconds of this pulse signal, when judged result is no, again time delay 2 seconds, judge whether to receive above-mentioned pulse signal after controlling the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside again, when judged result is for being, control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside and by detection number of times data from adding 1 renewal, if detection number of times data are equal to 3, then show to make mistakes with outside wiring in the indoor of current-loop communication circuit, and send fault cues immediately, terminate the interprocess communication inside air conditioner chamber and between outside to protect air conditioner room unit and off-premises station panel from occurring because crossing stream damaging；If detection number of times data are not equal to 3, then control the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside in time delay after 5 seconds, and whether the receiving terminal of the indoor or outside rejudging current-loop communication circuit exports the pulse signal that frequency values is 50 hertz.
If wiring error occurring between the indoor of current-loop communication circuit and outside, then cause that the optocoupler in current-loop communication circuit damages owing to there is too high voltage between the zero line N and connection S of current-loop communication circuit, and the panel further resulting in indoor apparatus of air conditioner and off-premises station damages.Such as, air-conditioning for single phase poaer supply supply, if misconnection is zero line N and phase line L between zero line N and connection S, then can there is the alternating voltage of 220V between indoor and outside respective zero line N and connection S, or the air-conditioning for three phase mains supply, when between zero line N and connection S, misconnection is a phase power line A and two-phase power line B, then can there is the alternating voltage of 380V between indoor and outside respective zero line N and connection S, aforesaid two kinds of alternating voltages can make the voltage in current-loop communication circuit be far longer than normal 24V voltage, the indoor of current-loop communication circuit or the transmitting terminal optocoupler of outside is made to cross stream heating, simultaneously as the alternating current of 50 hertz is added between zero line N and connection S, then through the diode D1 in Fig. 1 and diode D2 rectification, the pulse signal of 50 hertz can be detected at the receiving terminal RX2 of the receiving terminal RX1 of indoor or outside, if wiring is correct, now only exist the DC voltage of 24V between zero line N and connection S, then optocoupler normal operation, the receiving terminal RX1 of indoor or the receiving terminal RX2 of outside is without the pulse signal occurring 50 hertz.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method can be by program and completes with the hardware that instruction is relevant, described program can be stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk, CD etc..
Fig. 7 illustrates the structure of the communication detection system of the current-loop communication circuit that the embodiment of the present invention provides, and for the ease of illustrating, illustrate only part related to the present invention, details are as follows:
The communication detection system of current-loop communication circuit includes:
Power-up initializing module 100, optocoupler control and judge module 200, signal export judge module 300, redirect module 400, optocoupler controls to redirect module 800, system control module 900 and memory module 1000 with counting module 500, counting judge module 600, fault processing module 700, time delay.
The transmitting terminal optocoupler cut-off of the power-up initializing module 100 indoor or outside for controlling current-loop communication circuit when power-on of air conditioner, initializes stored detection number of times data in memory module 1000 time delay very first time interval.
Optocoupler controls and judge module 200 is for behind power-up initializing module 100 time delay very first time interval, control the transmitting terminal optocoupler conducting of the indoor of current-loop communication circuit or outside, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value.
Signal output judge module 300 is for when the judged result of optocoupler control and judge module 200 is for being, it is judged that whether the indoor of current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that above-mentioned frequency is predeterminated frequency reference value in the second interval.
Redirect module 400 for when the judged result of signal output judge module 300 is no, jumping to optocoupler and control and judge module 200.
Optocoupler controls with counting module 500 for when the judged result of signal output judge module 300 is for being, controlling the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data in memory module 1000.
Counting judge module 600 is for judging whether the detection number of times data in memory module 1000 are equal to preset times threshold value.
Fault processing module 700 is for when the judged result of counting judge module 600 is for being, sending fault cues, terminate the interprocess communication inside air conditioner chamber and between outside.
Time delay redirects module 800 for when the judged result counting judge module 600 is no, and time delay the 3rd interval also jumps to optocoupler control and judge module 200.
When system control module 900 is no for the judged result controlled with judge module 200 when optocoupler, control to open interprocess communication with outside inside air conditioner chamber.
Memory module 100 is used for storing detection number of times data.
Further, optocoupler controls to include with judge module 200:
First optocoupler control unit 201, the transmitting terminal optocoupler conducting of indoor or outside for controlling current-loop communication circuit；
Signal judging unit 202, for reading signal from the receiving terminal of the indoor of current-loop communication circuit or outside, and judges that this signal whether be frequency is the pulse signal of predeterminated frequency reference value.
Further, optocoupler controls to include with counting module 500:
Second optocoupler control unit 501, the transmitting terminal optocoupler cut-off of indoor or outside for controlling current-loop communication circuit；
Detection number of times data in memory module 1000 for carrying out obtaining new detection number of times data after add-one operation to the last detection number of times data preserved in memory module 1000, and are updated to new detection number of times data by counting unit 502.
Further, time delay redirects module 800 and includes:
Timing unit 801, for timing and generate chronometric data；
Chronometric data judging unit 802, for judging whether the chronometric data that timing unit 801 generates is equal to the 3rd interval；
First jump-transfer unit 803, for when the judged result of chronometric data judging unit 802 is for being, jumping to optocoupler and control and judge module 200；
Second jump-transfer unit 804, for when the judged result of chronometric data judging unit 802 is no, jumping to timing unit 801.
In actual applications, when only to the indoor of current-loop communication circuit or outside and when carrying out communication detection, above-mentioned communication detection system only need to be embedded in indoor apparatus of air conditioner or off-premises station.When needing to carry out communication detection between indoor and the outside of electric current loop communication short circuit, if selecting to control the transmitting terminal optocoupler of the indoor of current-loop communication circuit in indoor, and detect in outside pulse signals, then can by power-up initializing module 100, first optocoupler control unit 201, second optocoupler control unit 401, fault processing module 700 is embedded in indoor apparatus of air conditioner, and by signal judging unit 202, counting unit 402, redirect module 500, counting judge module 600, time delay redirects module 800, system control module 900 and memory module 1000 are embedded in air-conditioner outdoor unit；If selecting to control the transmitting terminal optocoupler of the outside of current-loop communication circuit in outside, and detect in indoor pulse signals, then power-up initializing module the 100, first optocoupler control unit the 201, second optocoupler control unit 401, fault processing module 700 can be embedded in air-conditioner outdoor unit, and by signal judging unit 202, counting unit 402, redirect module 500, counting judge module 600, time delay redirect module 800, system control module 900 and memory module 1000 and are embedded in indoor apparatus of air conditioner.
The embodiment of the present invention is by carrying out signal detection when the transmitting terminal optocoupler of the indoor or outside that control current-loop communication circuit turns on to the indoor of current-loop communication circuit or the receiving terminal of outside, if being continuously detected a pulse signal with fixed frequency in a prefixed time interval, then show that the mode of connection of current-loop communication circuit is made mistakes, air-conditioner can control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, concurrently it is out of order prompting, terminate the interprocess communication inside air conditioner chamber and between outside, thus reaching protection air conditioner room unit and off-premises station panel from the purpose damaged, solve the problem that existing current-loop communication circuit can cause the panel of indoor and outdoor both sides to be damaged when the mode of connection of indoor and outdoor both sides is made mistakes.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (9)
1. the communication detecting method of a current-loop communication circuit, it is characterised in that described communication detecting method comprises the following steps:
A. control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside when power-on of air conditioner, initialize and preset stored detection number of times data in memory space, and time delay very first time interval；
B. the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside are controlled, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value, it is then perform step C, no, then perform step H；
C. judge whether the indoor of described current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that described frequency is predeterminated frequency reference value in the second interval, be, then perform step D, no, then jump to described step B；
D. control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data preset in memory space；
E. judge that whether described detection number of times data are equal to preset times threshold value, are, then perform step F, no, then perform step G；
F. send fault cues, terminate the interprocess communication inside air conditioner chamber and between outside；
G. time delay the 3rd interval jump to described step B；
H. control to open interprocess communication with outside inside air conditioner chamber.
2. communication detecting method as claimed in claim 1, it is characterised in that the span at described very first time interval is 0.5 second to 10 seconds；
The span of described second interval is 50 milliseconds to 2000 milliseconds；
The span of described preset times threshold value is 1 to 20；
The span of described 3rd interval is 1 second to 15 seconds；
Described predeterminated frequency reference value is 50 hertz or 60 hertz.
3. communication detecting method as claimed in claim 1, it is characterised in that described step B specifically includes following steps:
Control the indoor of current-loop communication circuit or the transmitting terminal optocoupler conducting of outside；
Read signal from the receiving terminal of the indoor of current-loop communication circuit or outside, and judge that this signal whether be frequency is the pulse signal of predeterminated frequency reference value, be then perform described step C, no, then perform described step H.
4. communication detecting method as claimed in claim 1, it is characterised in that described step D specifically includes following steps:
Control the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside；
Carry out after add-one operation, obtain new detection number of times data to the last detection number of times data preserved in default memory space, and the detection number of times data in described default memory space are updated to described new detection number of times data.
5. communication detecting method as claimed in claim 1, it is characterised in that described step G specifically includes following steps:
Timing also generates chronometric data；
Judge that whether described chronometric data is equal to the 3rd interval, be then jump to described step B, no, then jump to described timing and generate the step of chronometric data.
6. the communication detection system of a current-loop communication circuit, it is characterised in that described communication detection system includes:
Power-up initializing module, optocoupler control with judge module, signal output judge module, optocoupler control with counting module, redirect module, counting judge module, fault processing module, time delay redirect module, system control module and memory module；
The transmitting terminal optocoupler cut-off of described power-up initializing module indoor or outside for controlling current-loop communication circuit when power-on of air conditioner, initializes stored detection number of times data in described memory module time delay very first time interval；
Described optocoupler controls and judge module is for behind described power-up initializing module time delay very first time interval, control the transmitting terminal optocoupler conducting of the indoor of current-loop communication circuit or outside, and judge whether the indoor of current-loop communication circuit or the receiving terminal of outside export the pulse signal that frequency is predeterminated frequency reference value；
Described signal output judge module is for when the judged result of the control of described optocoupler and judge module is for being, it is judged that whether the indoor of described current-loop communication circuit or the receiving terminal of outside continue to export the pulse signal that described frequency is predeterminated frequency reference value in the second interval；
The described module that redirects is for when the judged result of described signal output judge module is no, jumping to described optocoupler and control and judge module；
Described optocoupler controls with counting module for when the judged result of described signal output judge module is for being, controlling the indoor of current-loop communication circuit or the transmitting terminal optocoupler cut-off of outside, and update the detection number of times data in described memory module；
Described counting judge module is used for judging that whether described detection number of times data are equal to preset times threshold value；
Described fault processing module, for when the judged result of described counting judge module is for being, sending fault cues, terminates the interprocess communication inside air conditioner chamber and between outside；
Described time delay redirects module for when the judged result of described counting judge module is no, and time delay the 3rd interval also jumps to the control of described optocoupler and judge module；
When described system control module is no for the judged result controlled with judge module when described optocoupler, control to open interprocess communication with outside inside air conditioner chamber；
Described memory module is used for storing described detection number of times data.
7. communication detection system as claimed in claim 6, it is characterised in that described optocoupler controls to include with judge module:
First optocoupler control unit, the transmitting terminal optocoupler conducting of indoor or outside for controlling current-loop communication circuit；
Signal judging unit, for reading signal from the receiving terminal of the indoor of current-loop communication circuit or outside, and judges that described signal whether be frequency is the pulse signal of predeterminated frequency reference value.
8. communication detection system as claimed in claim 6, it is characterised in that described optocoupler controls to include with counting module:
Second optocoupler control unit, the transmitting terminal optocoupler cut-off of indoor or outside for controlling current-loop communication circuit；
Detection number of times data in described memory module for carrying out obtaining new detection number of times data after add-one operation to the last detection number of times data preserved in described memory module, and are updated to new detection number of times data by counting unit.
9. communication detection system as claimed in claim 6, it is characterised in that described time delay redirects module and includes:
Timing unit, for timing and generate chronometric data；
Chronometric data judging unit, is used for judging that whether described chronometric data is equal to the 3rd interval；
First jump-transfer unit, for when the judged result of described chronometric data judging unit is for being, jumping to described optocoupler and control and judge module；
Second jump-transfer unit, for when the judged result of described chronometric data judging unit is no, jumping to described timing unit.
Priority Applications (1)
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| CN104776559B (en) * | 2015-03-30 | 2017-11-10 | 广东美的制冷设备有限公司 | A kind of convertible frequency air-conditioner and its bus-type electric current loop communication system |
| CN105203891B (en) * | 2015-10-26 | 2018-02-09 | 亚世光电股份有限公司 | A kind of handle type intelligent detection instrument and application method |
| CN108732452B (en) * | 2018-05-31 | 2020-05-15 | 广东美芝制冷设备有限公司 | Air conditioning system and communication detection method and device of current loop communication circuit of air conditioning system |
| CN112443939A (en) * | 2019-09-04 | 2021-03-05 | 青岛海尔空调电子有限公司 | Outdoor unit active detection method for communication miswiring of indoor unit and outdoor unit of air conditioner |
| CN112443938A (en) * | 2019-09-04 | 2021-03-05 | 青岛海尔空调电子有限公司 | Indoor unit active detection method for communication miswiring of indoor unit and outdoor unit of air conditioner |
| CN110673082B (en) * | 2019-11-05 | 2021-03-12 | 广东电网有限责任公司 | 485 communication detection system |
| CN115597184B (en) * | 2022-10-21 | 2024-07-23 | 珠海格力电器股份有限公司 | Method and device for protecting against wrong connection, air conditioner and storage medium |
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