CN110470037A - Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line - Google Patents
Reverse-connection preventing circuit, method, apparatus and the air conditioner of convertible frequency air-conditioner power supply line Download PDFInfo
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- CN110470037A CN110470037A CN201910710541.6A CN201910710541A CN110470037A CN 110470037 A CN110470037 A CN 110470037A CN 201910710541 A CN201910710541 A CN 201910710541A CN 110470037 A CN110470037 A CN 110470037A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The invention discloses reverse-connection preventing circuit, method, apparatus and the air conditioners of a kind of convertible frequency air-conditioner power supply line.The present invention is connect with indoor unit and outdoor unit by detection unit by zero curve respectively, is connect, is connect by the second communication line with outdoor unit, detection unit is also connect with switch unit with indoor unit by the first communication line；Switch unit is connect by the first firewire with indoor unit, is connect by the second firewire with outdoor unit；Wherein, detection unit obtain indoor unit output voltage, according to output voltage obtain the external interrupt time, according to the external interrupt time judge the first firewire whether with the first communication line reversal connection；Switch unit disconnects the connection of indoor unit and outdoor unit in reversal connection.Wherein, the external interrupt time is obtained by detection unit, and detects whether power supply line is reversely connected according to external interrupt length of time, detection loop is simple accurately, speed is fast, at low cost, and a possibility that outdoor unit master control borad will not be powered, prevent burning plate in the case where wrong line.
Description
Technical field
The present invention relates to convertible frequency air-conditioner technical field more particularly to a kind of reverse-connection preventing circuits of convertible frequency air-conditioner power supply line, side
Method, device and air conditioner.
Background technique
Convertible frequency air-conditioner indoor unit communicates the total N line current ring telecommunication circuit generallyd use, indoor unit and outdoor with outdoor unit
The connecting line of machine includes firewire, zero curve and communication line, when these three lines are reversed, if outdoor unit master control borad is powered, it is most likely that
There is the case where burning plate.
The indoor and outdoor machine power supply wiring that Chinese patent literature CN201420335084.X discloses a kind of convertible frequency air-conditioner is wrong
Accidentally protective device, and specifically disclose that indoor pusher side is corresponding with outdoor firewire, zero curve, the SIG line of pusher side to be connected and form logical
Believe that electric current loop, outdoor pusher side are isolated by photoelectrical coupler, then using transistor drive circuit and outdoor automatically controlled MCU
Serial communication interface be connected, outdoor automatically controlled MCU samples the supply voltage value after rectifier bridge stack rectifies, when outdoor unit control
The voltage value that making sheet receives is less than judgment threshold, that is, is judged as wrong line.The patent can not accomplish outdoor master control borad and power supply
Line it is completely isolated, when power supply wiring mistake master control borad still have burn plate risk, meanwhile, using voltage signal determine wiring whether
Mistake is easily overlapped with failures such as low-voltage variations and determines that the time is longer, influences breakdown judge accuracy and real-time, leads to outdoor
Machine master control borad safety is not high.
Summary of the invention
The main purpose of the present invention is to provide reverse-connection preventing circuit, method, apparatus and the skies of a kind of convertible frequency air-conditioner power supply line
Adjust device, it is intended to which solution can not timely and accurately determine that convertible frequency air-conditioner indoor unit and outdoor machine wire connection mistake lead to room in the prior art
The outer unsafe technical problem of machine master control borad.
To achieve the above object, the present invention provides a kind of reverse-connection preventing circuit of convertible frequency air-conditioner power supply line, and the circuit includes
Detection unit and switch unit；The detection unit is connect with the indoor unit and the outdoor unit respectively by zero curve, is passed through
First communication line is connect with the indoor unit, is connect by the second communication line with the outdoor unit, the detection unit also with institute
State switch unit connection；The switch unit is connect by the first firewire with the indoor unit, and the second firewire and the room are passed through
Outer machine connection；Wherein,
The detection unit obtains in outside for obtaining the output voltage of the indoor unit according to the output voltage
The disconnected time, according to the external interrupt time judge the first firewire whether with the reversal connection of the first communication line；
The switch unit, for disconnecting the connection of the indoor unit Yu the outdoor unit in reversal connection.
Preferably, the detection unit includes the first optocoupler, the second optocoupler and microcontroller；Wherein,
The first end of the control terminal of first optocoupler is connect with the first external power supply, the control terminal of first optocoupler
Second end is connect with the first control terminal of the microcontroller, and the first end of the controlled end of first optocoupler is distinguished by zero curve
It is connect with the indoor unit and the outdoor unit, the control of the second end of the controlled end of first optocoupler and second optocoupler
The first end at end connects；
Second control terminal of the microcontroller is connect with the switch unit, communication ends of the microcontroller and described
The middle broken ends of fractured bone of microcontroller is connect with the first end of the controlled end of second optocoupler；
The second end of the control terminal of second optocoupler is connect by the first communication line with the indoor unit, second light
The first end of the control terminal of coupling is connect by the second communication line with the outdoor unit, the second end of the controlled end of second optocoupler
It is connect with the second external power supply.
Preferably, the detection unit further includes first capacitor, the second capacitor and third capacitor；Wherein,
The of the second end of the control terminal of the first end of the first capacitor and first optocoupler and the microcontroller
One control terminal is separately connected, the second end ground connection of the first capacitor；
The first end of the controlled end of the first end of second capacitor and second optocoupler and leading to for the microcontroller
Letter end is separately connected, the second end ground connection of second capacitor；
The middle broken ends of fractured bone of the first end and the microcontroller of the first end of the third capacitor and second capacitor is distinguished
Connection, the second end ground connection of the third capacitor.
Preferably, the switch unit includes relay, the second control of the coil of the relay and the microcontroller
End processed connection, the contact at the relay both ends pass through the first firewire respectively and connect with the indoor unit, by the second firewire and
The outdoor unit connection.
The present invention also proposes a kind of counnter attack connection device of convertible frequency air-conditioner power supply line, the convertible frequency air-conditioner power supply line it is anti-reverse
Device includes the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line as described above.
The present invention also proposes that a kind of air conditioner, the air conditioner include that indoor unit, outdoor unit and frequency conversion as described above are empty
Adjust the counnter attack connection device of power supply line.
The present invention also proposes a kind of anti-reverse method of convertible frequency air-conditioner power supply line, the described method comprises the following steps:
Obtain the output voltage of indoor unit；
The external interrupt time is obtained according to the output voltage；
According to the external interrupt time judge the first firewire whether with the first communication line be reversely connected.
Preferably, the step for judging that whether the first firewire is reversely connected with the first communication line according to the external interrupt time
Suddenly, comprising:
When the external interrupt time being greater than preset time, determine that the first firewire and the first communication line are reversely connected.
Preferably, described that the step of whether the first firewire is reversely connected with the first communication line is judged according to the external interrupt time
Later, the method also includes:
When the first firewire and the first communication line are reversely connected, control relay disconnects the connection of indoor unit and outdoor unit.
Preferably, the step for judging that whether the first firewire is reversely connected with the first communication line according to the external interrupt time
Suddenly, comprising:
When the external interrupt time being not more than preset time, determine that the first firewire is not reversely connected with the first communication line.
The present invention is connect with indoor unit and outdoor unit by detection unit by zero curve respectively, passes through the first communication line and room
Interior machine connection, is connect by the second communication line with outdoor unit, detection unit is also connect with switch unit；Switch unit passes through first
Firewire is connect with indoor unit, is connect by the second firewire with outdoor unit；Wherein, detection unit obtains the output voltage of indoor unit,
The external interrupt time is obtained according to output voltage, judges whether the first firewire is anti-with the first communication line according to the external interrupt time
It connects；Switch unit disconnects the connection of indoor unit and outdoor unit in reversal connection.Wherein, detection is set between indoor machine and outdoor unit
Unit and switch unit obtain the external interrupt time by detection unit, and detect power supply line according to external interrupt length of time
Whether it is reversely connected, detection loop is simple accurately, speed is fast, at low cost, and outdoor unit master control borad will not in the case where wrong line
A possibility that being powered, having prevented burning plate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of functional block diagram of one embodiment of reverse-connection preventing circuit of convertible frequency air-conditioner power supply line of the present invention；
Fig. 2 is a kind of structural schematic diagram of one embodiment of reverse-connection preventing circuit of convertible frequency air-conditioner power supply line of the present invention；
Microcontroller receives signal schematic representation when Fig. 3 is L and S wrong in an embodiment；
Fig. 4 is a kind of flow diagram of one embodiment of anti-reverse method of convertible frequency air-conditioner power supply line of the present invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Detection unit | IC1 | First optocoupler |
| 200 | Switch unit | IC2 | Second optocoupler |
| L1 | First firewire | V1 | First external power supply |
| L2 | Second firewire | V2 | Second external power supply |
| N | Zero curve | MCU | Microcontroller |
| S1 | First communication line | C1 | First capacitor |
| S2 | Second communication line | C2 | Second capacitor |
| RY | Relay | C3 | Third capacitor |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention provides a kind of reverse-connection preventing circuit of convertible frequency air-conditioner power supply line.
Referring to Fig.1, in one embodiment, the circuit includes detection unit 100 and switch unit 200；The detection is single
Member 100 is connect with the indoor unit and the outdoor unit respectively by zero curve (N), passes through the first communication line (S1) and the interior
Machine connection, connect by the second communication line (S2) with the outdoor unit, the detection unit 100 also with the switch unit 200
Connection；The switch unit 200 is connect by the first firewire (L1) with the indoor unit, and the second firewire (L2) and the room are passed through
Outer machine connection；Wherein, the detection unit 100 is obtained for obtaining the output voltage of the indoor unit according to the output voltage
The external interrupt time, according to the external interrupt time judge the first firewire whether with the first communication line reversal connection；The switch
Unit 200, for disconnecting the connection of the indoor unit Yu the outdoor unit in reversal connection.
It should be noted that the indoor unit of convertible frequency air-conditioner is communicated with outdoor unit generallys use total N line current ring telecommunication circuit,
I.e. the N line of electric current loop and AC power source shares single line, and signal is loaded on electric current loop, realizes logical compared with distant signal transmission
Believe circuit.In existing indoor unit and outdoor unit telecommunication circuit, when L, N are reversed, outdoor unit master control borad is not in burn plate feelings
Moreover effective current ring communication will not be formed, communication failure is reported；Diode meeting when N, S are reversed, in current loop communication circuit
Reversed cut-off, will not burn plate and will not form effective current ring communication, report communication failure；When L, S are reversed, high-voltage signal can be straight
It connects and is added in communications loop, generate high current, occur burning plate situation.
The present embodiment carries out communication plan using neutral line current ring altogether for convertible frequency air-conditioner indoor and outdoor machine, and frequency conversion is added in centre
The reverse-connection preventing circuit of air conditioner power source line.When L1, S1 are reversed, the external interrupt time that detection unit 100 detects is significantly greater than
Thus external interrupt time when not reversed determines that L1, S1 are reversed, and control switch unit 200 turns off, and outdoor unit is avoided to occur
Burn plate situation.
In the present embodiment, the signal of indoor unit, and the on-off of control switch unit 200 are received by detection unit, thus
Control indoor unit is connect with outdoor unit, and when L1 and S1 are reversed, outdoor unit will not be powered, and outdoor unit master control borad is in safe shape
State is not in the case where burning plate.Simultaneously as judging whether power supply line is anti-using the break period of signal in the present embodiment
Connect, compared to it is traditional determined according to voltage signal for, be not easy to be overlapped with low-voltage variation failure, it is more accurate to judge, and sentences
The disconnected time is shorter, more efficient.
Further, please with reference to Fig. 1 and Fig. 2, in one embodiment, the detection unit 100 includes the first optocoupler
IC1, the second optocoupler IC2 and microcontroller；Wherein, the first end of the control terminal of the first optocoupler IC1 and the first external electricity
Source V1 connection, the second end of the control terminal of the first optocoupler IC1 and the first control terminal CON1 of the microcontroller connect
It connecing, the first end of the controlled end of the first optocoupler IC1 is connect with the indoor unit and the outdoor unit respectively by zero curve N,
The second end of the controlled end of the first optocoupler IC1 is connect with the first end of the control terminal of the second optocoupler IC2；The micro-control
The second control terminal CON2 of device MCU processed is connect with the switch unit 200, the communication ends RXD of the microcontroller and described
The middle broken ends of fractured bone INT of microcontroller is connect with the first end of the controlled end of the second optocoupler IC2；The second optocoupler IC2
The second end of control terminal connect with the indoor unit by the first communication line S1, the of the control terminal of the second optocoupler IC2
One end is connect by the second communication line S2 with the outdoor unit, outside the second end and second of the controlled end of the second optocoupler IC2
Connect power supply V2 connection.
It can be readily appreciated that the first external power supply V1 and the second external power supply V2 are the external power supply of circuit,
Voltage can be+5V.The microcontroller can be the microcontroller of standby platelet, or independent controller, this
Embodiment is without restriction to this.
It should be noted that the first optocoupler IC1 and the second optocoupler IC2 conducting is controlled after microcontroller powers on, this
When microcontroller and indoor unit formed current loop, turn off switch unit 200, power off outdoor unit.Meanwhile microcontroller
MCU receives the signal of indoor unit transmission using external interrupt mouth all the way, when L and S are reversed, level that external interrupt receives
Signal such as Fig. 3, since the diode in telecommunication circuit can only receive half-wave signa, virtual value 220/2=110V works as voltage
When conduction value greater than the second optocoupler IC2, external interrupt mouth receives high level, and the period is voltage signal cycles 0.02s, A, A'
It triggers and interrupts the moment for rising edge, B, B' are that the moment is interrupted in failing edge triggering, by monitoring continuous down trigger time interval, are sentenced
It is fixed whether wrong line, respond rapidly to failure triggering, be simple and efficient.
It will be appreciated that is, under normal circumstances, the output voltage of indoor unit is 24V, and works as L1 when L1 and S1 be not reversed
When reversed with S1, the output voltage of indoor unit is the 220V of alternating current, therefore, when L1 and S1 are reversed, when voltage signal cycles
Between be greater than voltage signal cycles time under normal circumstances, the external interrupt time that microcontroller receives obviously will be more
It is long.At this point, by detect the external interrupt time whether be greater than preset time, when detect the external interrupt time be greater than preset time
When, it is possible to determine that L1 and S1 are reversed.
Further, the detection unit 100 further includes first capacitor C1, the second capacitor C2 and third capacitor C3；Wherein,
The of the second end of the control terminal of the first end of the first capacitor C1 and the first optocoupler IC1 and the microcontroller
One control terminal CON1 is separately connected, the second end ground connection of the first capacitor C1；The first end of the second capacitor C2 with it is described
The first end of the controlled end of second optocoupler IC2 and the communication ends RXD of the microcontroller are separately connected, second capacitor
The second end of C2 is grounded；The first end and the microcontroller of the first end of the third capacitor C3 and the second capacitor C2
The middle broken ends of fractured bone INT of MCU is separately connected, the second end ground connection of the third capacitor C3.
It should be noted that needing to ensure that microcontroller receives more accurate useful signal in microcontroller
Increase capacitor before the pin of MCU reception signal to filter over the ground, wherein first capacitor C1, the second capacitor C2 and third capacitor C3 are equal
For filter capacitor, the signal for being input to microcontroller is avoided to have clutter.
Further, the switch unit 200 includes relay RY, the coil and the microcontroller of the relay RY
The second control terminal CON2 connection of MCU, the contact at the both ends the relay RY passes through the first firewire L1 and the indoor unit respectively
Connection, is connect by the second firewire L2 with the outdoor unit.
It should be understood that microcontroller controls relay RY shutdown when detection unit determines L1 and S1 reversed,
So that indoor unit is not powered to outdoor unit, as L1 and S1 not reversed, then relay RY conducting is controlled, realize that outdoor unit supplies
Electricity, complete machine work normally.
The present embodiment connect with indoor unit and outdoor unit respectively by detection unit by zero curve, by the first communication line and
Indoor unit connection, is connect by the second communication line with outdoor unit, detection unit is also connect with switch unit；Switch unit passes through the
One firewire is connect with indoor unit, is connect by the second firewire with outdoor unit；Wherein, detection unit obtains the output electricity of indoor unit
Pressure, according to output voltage obtain the external interrupt time, according to the external interrupt time judge the first firewire whether with the first communication line
Reversal connection；Switch unit disconnects the connection of indoor unit and outdoor unit in reversal connection.Wherein, inspection is set between indoor machine and outdoor unit
Unit and switch unit are surveyed, the external interrupt time is obtained by detection unit, and power supply is detected according to external interrupt length of time
Whether line is reversely connected, and detection loop is simple accurate, speed is fast, at low cost, and outdoor unit master control borad is not in the case where wrong line
A possibility that being powered, having prevented burning plate.
The present invention also proposes a kind of counnter attack connection device of convertible frequency air-conditioner power supply line, the convertible frequency air-conditioner power supply line it is anti-reverse
Device includes the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line as described above, the counnter attack connection device of the convertible frequency air-conditioner power supply line
The circuit structure of the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line can refer to above-described embodiment, and details are not described herein；It is understood that
It is, since the counnter attack connection device of the convertible frequency air-conditioner power supply line of the present embodiment uses the anti-reverse electricity of above-mentioned convertible frequency air-conditioner power supply line
The technical solution on road, therefore the counnter attack connection device of the convertible frequency air-conditioner power supply line has above-mentioned all beneficial effects, it should be understood that
, the counnter attack connection device of the convertible frequency air-conditioner power supply line can be standby platelet, L, N, S input terminal configured on standby platelet
And outlet terminal, input terminal pass through L1, S1 and N respectively and connect with indoor unit, outlet terminal passes through L2, S2 and N and room respectively
Outer machine connection.
The present invention also proposes that a kind of air conditioner, the air conditioner include that indoor unit, outdoor unit and frequency conversion as described above are empty
Adjust the counnter attack connection device of power supply line.It is understood that the air conditioner due to the present embodiment uses above-mentioned convertible frequency air-conditioner power supply
The technical solution of the counnter attack connection device of line, therefore the air conditioner has above-mentioned all beneficial effects.
Based on above-mentioned hardware configuration, the present invention also proposes a kind of anti-reverse method of convertible frequency air-conditioner power supply line.Such as Fig. 4 institute
Show, in the present embodiment, the described method comprises the following steps:
S10: the output voltage of indoor unit is obtained；
It will be appreciated that is, under normal circumstances, the output voltage of indoor unit is 24V, and works as L1 when L1 and S1 be not reversed
When reversed with S1, the output voltage of indoor unit is the 220V of alternating current.
S20: the external interrupt time is obtained according to the output voltage；
It should be noted that the second optocoupler IC2 generates different external interrupt signals simultaneously according to the output voltage received
It is sent to microcontroller, microcontroller determines the external interrupt time according to external interrupt signal.
S30: judge whether the first firewire be reversely connected with the first communication line according to the external interrupt time.
It should be understood that the voltage signal cycles time is greater than the letter of voltage under normal circumstances when L1 and S1 are reversed
Number cycle time, the external interrupt time that microcontroller receives obviously want longer.At this point, when by detection external interrupt
Between whether be greater than preset time, when detect the external interrupt time be greater than preset time when, it is possible to determine that L1 and S1 are reversed.
Wherein, preset time can rule of thumb carry out customized setting, such as 16ms, 18ms, the present embodiment to this not
It limits.
In the concrete realization, when the external interrupt time being not more than preset time, determine that L1 and S1 is not reversely connected, work as institute
When stating the external interrupt time greater than preset time, L1 and S1 reversal connection is determined, and when L1 and S1 is reversely connected, control relay RY is disconnected
Open the connection of indoor unit and outdoor unit.
Hereinafter, illustrating that the work of the present embodiment is former so that the counnter attack connection device of convertible frequency air-conditioner power supply line is standby platelet as an example
Reason: after standby platelet powers on, when into standby mode, opening the first optocoupler IC1 and the second optocoupler IC2, standby platelet and indoor
Machine forms current loop, turns off relay RY, powers off outdoor unit.Second optocoupler IC2 is generated according to the output voltage received
Different external interrupt signals is simultaneously sent to microcontroller, and microcontroller determines external interrupt according to external interrupt signal
Time, as continuous external interrupt time interval < 16ms, judgement does not occur power supply line reversal connection, relay RY closure, and outdoor unit supplies
Electricity, complete machine work normally；As continuous external interrupt time interval > 16ms, the first optocoupler IC1 and the second optocoupler IC2 is closed, is closed
Disconnected relay RY, report power supply line are reversely connected failure.
The present embodiment obtains the external interrupt time according to output voltage, according to outer by the output voltage of acquisition indoor unit
Portion judges whether the first firewire is reversely connected with the first communication line the break period.Wherein, detection is set between indoor machine and outdoor unit
Unit and switch unit obtain the external interrupt time by detection unit, and detect power supply line according to external interrupt length of time
Whether it is reversely connected, detection loop is simple accurately, speed is fast, at low cost, and outdoor unit master control borad will not in the case where wrong line
A possibility that being powered, having prevented burning plate.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of reverse-connection preventing circuit of convertible frequency air-conditioner power supply line, which is characterized in that including detection unit and switch unit；The inspection
It surveys unit to connect with the indoor unit and the outdoor unit respectively by zero curve, be connected by the first communication line and the indoor unit
It connects, is connect by the second communication line with the outdoor unit, the detection unit is also connect with the switch unit；The switch is single
Member is connect by the first firewire with the indoor unit, is connect by the second firewire with the outdoor unit；Wherein,
The detection unit, for obtaining the output voltage of the indoor unit, when obtaining external interrupt according to the output voltage
Between, according to the external interrupt time judge the first firewire whether with the first communication line be reversely connected；
The switch unit, for disconnecting the connection of the indoor unit Yu the outdoor unit in reversal connection.
2. the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line as described in claim 1, which is characterized in that the detection unit includes
First optocoupler, the second optocoupler and microcontroller；Wherein,
The first end of the control terminal of first optocoupler is connect with the first external power supply, and the second of the control terminal of first optocoupler
End is connect with the first control terminal of the microcontroller, the first end of the controlled end of first optocoupler pass through zero curve respectively with institute
Indoor unit is stated to connect with the outdoor unit, the control terminal of the second end of the controlled end of first optocoupler and second optocoupler
First end connection；
Second control terminal of the microcontroller is connect with the switch unit, the communication ends of the microcontroller and the micro-control
The middle broken ends of fractured bone of device processed is connect with the first end of the controlled end of second optocoupler；
The second end of the control terminal of second optocoupler is connect by the first communication line with the indoor unit, second optocoupler
The first end of control terminal is connect by the second communication line with the outdoor unit, the second end of the controlled end of second optocoupler and the
The connection of two external power supplys.
3. the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line as claimed in claim 2, which is characterized in that the detection unit is also wrapped
Include first capacitor, the second capacitor and third capacitor；Wherein,
First control of the second end and the microcontroller of the first end of the first capacitor and the control terminal of first optocoupler
End processed is separately connected, the second end ground connection of the first capacitor；
The first end of the controlled end of the first end of second capacitor and second optocoupler and the communication ends of the microcontroller
It is separately connected, the second end ground connection of second capacitor；
The first end of the third capacitor is separately connected with the first end of second capacitor and the middle broken ends of fractured bone of the microcontroller,
The second end of the third capacitor is grounded.
4. the reverse-connection preventing circuit of convertible frequency air-conditioner power supply line as claimed in claim 3, which is characterized in that the switch unit includes
Relay, the coil of the relay are connect with the second control terminal of the microcontroller, the contact point at the relay both ends
Not Tong Guo the first firewire connect with the indoor unit, connect by the second firewire with the outdoor unit.
5. a kind of counnter attack connection device of convertible frequency air-conditioner power supply line, which is characterized in that the counnter attack of the convertible frequency air-conditioner power supply line is hinged with
Set the reverse-connection preventing circuit of the convertible frequency air-conditioner power supply line including such as claim 1-4 any one.
6. a kind of air conditioner, which is characterized in that the air conditioner includes indoor unit, outdoor unit and change as claimed in claim 5
The counnter attack connection device of frequency air conditioner power source line.
7. a kind of anti-reverse method of convertible frequency air-conditioner power supply line, which is characterized in that the described method comprises the following steps:
Obtain the output voltage of indoor unit；
The external interrupt time is obtained according to the output voltage；
According to the external interrupt time judge the first firewire whether with the first communication line be reversely connected.
8. the anti-reverse method of convertible frequency air-conditioner power supply line as claimed in claim 7, which is characterized in that described according to the outside
Break period judges the step of whether the first firewire is reversely connected with the first communication line, comprising:
When the external interrupt time being greater than preset time, determine that the first firewire and the first communication line are reversely connected.
9. the anti-reverse method of convertible frequency air-conditioner power supply line as claimed in claim 7, which is characterized in that described according to the outside
After break period judges the step of whether the first firewire is reversely connected with the first communication line, the method also includes:
When the first firewire and the first communication line are reversely connected, control relay disconnects the connection of indoor unit and outdoor unit.
10. the anti-reverse method of convertible frequency air-conditioner power supply line as claimed in claim 7, which is characterized in that described according to described outer
Portion judges the step of whether the first firewire is reversely connected with the first communication line the break period, comprising:
When the external interrupt time being not more than preset time, determine that the first firewire is not reversely connected with the first communication line.
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| CN201910710541.6A CN110470037B (en) | 2019-08-01 | 2019-08-01 | Anti-reverse connection circuit, method and device for power line of variable frequency air conditioner and air conditioner |
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| CN111256286A (en) * | 2020-02-17 | 2020-06-09 | 海信（山东）空调有限公司 | Method and device for controlling line sequence |
| 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 |
| CN114459137A (en) * | 2022-01-11 | 2022-05-10 | 珠海格力电器股份有限公司 | Zero-line and fire-line conditioning device of air conditioner, control method of zero-line and fire-line conditioning device and air conditioner |
| CN114566956A (en) * | 2022-03-08 | 2022-05-31 | 珠海格力电器股份有限公司 | Zero-live line adjusting circuit and method and air conditioner |
| 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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