CN114992806A - Zero-live line sequence conditioning device of air conditioner and control method thereof - Google Patents

Zero-live line sequence conditioning device of air conditioner and control method thereof Download PDF

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Publication number
CN114992806A
CN114992806A CN202210661760.1A CN202210661760A CN114992806A CN 114992806 A CN114992806 A CN 114992806A CN 202210661760 A CN202210661760 A CN 202210661760A CN 114992806 A CN114992806 A CN 114992806A
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line
zero
module
power
machine
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CN202210661760.1A
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CN114992806B (en
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梁尚
宋爱
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a zero-fire line sequence conditioning device of an air conditioner and a control method thereof, wherein the device comprises the following components: the indoor unit zero and live wire reverse connection identification and alignment unit identifies the zero line in the first power line and the second power line of the indoor unit and leads the identified zero line to be connected with the connecting line between the communication modules of the indoor unit; the auxiliary line sequence identification unit of the inner machine and the outer machine is used for connecting the identified zero line into a communication current loop and then connecting the identified power supply line where the zero line is located with a connecting line between corresponding outer machine power lines in a first power line and a second power line of the outer machine; and after a power supply line for supplying power to the external machine from the internal machine is connected, the current flow directions of the first power line of the external machine and the second power line of the external machine are identified, and a corresponding connecting line between the zero-live wire communication power supply and the communication module of the external machine is selected for connection. This scheme need not distinguish through the installation that makes zero live wire between interior machine and commercial power, the interior machine of interior, has reduced the assembly degree of difficulty of zero live wire.

Description

Zero-live line sequence conditioning device of air conditioner and control method thereof
Technical Field
The invention belongs to the technical field of air conditioners, particularly relates to a zero-line and live-line sequence conditioning device of an air conditioner and a control method thereof, and particularly relates to a zero-line and live-line sequence self-conditioning circuit of an internal machine and an external machine of the air conditioner and a control method thereof.
Background
Most air conditioners are composed of an indoor unit and an outdoor unit. The indoor unit and the outdoor unit need to communicate with each other to realize complex functions. For example, the inverter air conditioner needs to change the operating frequency of the compressor of the outdoor unit according to different operating conditions, which requires frequent communication between the indoor unit and the outdoor unit. However, in practice, the indoor unit and the outdoor unit of the air conditioner are far apart from each other and have a lot of interference, which affects the reliability of communication between the indoor unit and the outdoor unit. In order to ensure the reliability of communication between an air conditioner indoor unit (namely an indoor unit) and an air conditioner outdoor unit (namely an outdoor unit), the communication mode between the indoor unit and the outdoor unit usually adopts a three-wire system, namely a connecting wire between the indoor unit and the outdoor unit comprises a zero wire, a live wire and a communication wire, so that half-duplex asynchronous serial port communication is formed, and the communication is safe, reliable and low in cost.
In general, 220V alternating current AC is input into an air conditioner indoor unit, but zero line and live line (namely, zero line and live line) of the indoor unit are connected reversely due to accidents or errors. Although the zero-live wire of the indoor unit is reversely connected, the integrity of a communication loop and the voltage of a communication power supply are not influenced, the voltage between the communication wire and the zero wire is too high, the insulation voltage limit is easily exceeded, the electrical risk exists, and a PCB is easily punctured, so that certain risk is generated.
The outdoor unit is usually supplied with the commercial power by the indoor unit, but the outdoor unit is reversely connected with the zero line during installation. Once the outdoor unit zero line and the hot line are reversely connected, a communication circuit between the outdoor unit and the indoor unit cannot form a current loop (namely, a communication loop), so that communication faults are caused, and the air conditioner cannot be normally started. Faults need to be checked, and the zero line position needs to be manually changed, so that the installation efficiency is limited, high-altitude operation is needed during the resetting, and the operation risk of installation personnel is increased.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a zero-live wire sequence conditioning device of an air conditioner and a control method thereof, and aims to solve the problems that the reverse connection of a zero-live wire between an indoor unit of the air conditioner and a mains supply can cause overhigh voltage between a communication wire and a zero wire and electrical risks, the reverse connection of a zero-live wire between an indoor unit and an outdoor unit of the air conditioner can cause communication faults of the indoor unit and the outdoor unit to be incapable of working, the assembly difficulty of the zero-live wire between the indoor unit of the air conditioner and the mains supply and the assembly difficulty of the zero-live wire between the indoor unit of the air conditioner and the outdoor unit of the air conditioner are higher after the zero-live wire between the indoor unit of the air conditioner and the mains supply and the assembly error and the risk of damaging the air conditioner can be generated The zero-live wire assembling difficulty between the indoor unit and the commercial power of the air conditioner and the zero-live wire between the indoor unit and the outdoor unit of the air conditioner are avoided, the assembling difficulty is high, and the risk of damaging the air conditioner is avoided.
The invention provides a zero-fire line sequence conditioning device of an air conditioner, wherein the air conditioner is provided with an inner machine and an outer machine; an inner machine communication module is arranged on the inner machine side; an external machine communication module is arranged on the external machine side; the power cord of the internal machine includes: an inner machine first power line and an inner machine second power line; the power cord of the outdoor unit includes: the first power line of the outdoor unit and the second power line of the outdoor unit; the outdoor unit is provided with a first zero-live wire communication power supply and a second zero-live wire communication power supply; the outer machine communication module and the inner machine communication module can be connected through a power line and a communication line to form a communication current loop; zero line order of fire line of air conditioner is taked care of and is put, includes: the system comprises an internal machine zero-live wire reverse connection identification and alignment unit, an internal and external machine line sequence identification auxiliary unit and an external machine line sequence identification and alignment unit; the indoor unit zero-live wire reverse connection identification and alignment unit is configured to identify a zero line in the indoor unit first power line and the indoor unit second power line and enable a connecting line between the zero line in the indoor unit first power line and the indoor unit second power line and the indoor unit communication module to be connected so as to enable the zero line in the indoor unit first power line and the indoor unit second power line to be connected into the communication current loop; the inner machine and outer machine line sequence identification auxiliary unit is configured to connect a power supply line where a zero line in the inner machine first power line and the inner machine second power line is located with a connecting line between the outer machine first power line and a corresponding outer machine power line in the outer machine second power line under the condition that the zero line in the inner machine first power line and the inner machine second power line are connected into the communication current loop, so as to connect the power supply line for supplying power to the outer machine by the inner machine; the outer machine line sequence identification and adjustment unit is configured to identify current flow directions of a first power line and a second power line of the outer machine under the condition that a power supply line for supplying power to the outer machine by the inner machine is connected, and select a connecting line between a corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply and the outer machine communication module to be connected, so that the corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply is connected into the communication current loop.
In some embodiments, the internal line-zero-line reverse connection identification and alignment unit includes: the zero line detection module and the zero line selection module; wherein, interior machine zero live wire transposition discernment and alignment unit discerns first power cord of interior machine with the zero line in the interior machine second power cord to make first power cord of interior machine with zero line in the interior machine second power cord with the connecting wire switch-on between the interior machine communication module, include: the zero line detection module is configured to identify a zero line in the inner machine first power line and the inner machine second power line; the zero line selection module is configured to connect a connecting line between the zero line in the first power line and the second power line of the inner machine and the inner machine communication module based on the identified zero line in the first power line and the second power line of the inner machine.
In some embodiments, the neutral detection module includes: the device comprises a first switch module, a current limiting module, a bidirectional diode module, a capacitor module and a signal acquisition and processing module; any one of the first power line of the inner machine and the second power line of the inner machine is used as an inner machine detection line; after the detection of the internal machine passes through the first switch module and the current limiting module, the internal machine is connected to the first end of the bidirectional diode module and the first end of the capacitor module on one hand, and is connected to the first end of the signal acquisition processing module on the other hand; the second end of the bidirectional diode module and the second end of the capacitor module are connected to the second end of the signal acquisition and processing module; the second end of the bidirectional diode module is also connected with the shell; the third end of the signal acquisition processing module is used as an output end and is used for outputting a zero line detection result to the controller of the air conditioner; the fourth end of the signal acquisition processing module is connected with a direct current power supply; in the bidirectional diode module, the anode of a first diode is connected with the cathode of a second diode, and the cathode of the first diode is connected with the anode of the second diode; the signal acquisition processing module adopts a differential amplifying circuit; and under the condition that the first switch module is closed, the signal acquisition processing module outputs a zero line detection result that the inner machine detection line is a live line or a zero line.
In some embodiments, the neutral line selection module includes: the first zero line selection branch and the second zero line selection branch are connected with the first zero line selection branch; the first power line of the inner machine is connected to the communication module of the inner machine after passing through the first zero line selection branch, and the second power line of the inner machine is connected to the communication module of the inner machine after passing through the second zero line selection branch; the first zero line selection branch and the second zero line selection branch have the same structure; the first zero line selection branch comprises: the protection circuit comprises a first diode module, a first protection module and a second switch module; wherein the inner-unit first power line is connected to a cathode of the diode module; the anode of the first diode module is connected to the internal machine communication module after passing through the first protection module and the second switch module; and under the condition that the second switch module is closed, the first power line of the inner machine is connected to the inner machine communication module.
In some embodiments, the internal and external machine thread order identification assisting unit includes: a first auxiliary branch and a second auxiliary branch; the first power line of the inner machine is connected to a first output line through the first auxiliary branch, and the second power line of the inner machine is connected to a second output line through the second auxiliary branch; the first output line can be connected with one of the first power line of the outdoor unit and the second power line of the outdoor unit; the second output line can be connected with the other one of the first power line of the outdoor unit and the second power line of the outdoor unit; the first auxiliary branch and the second auxiliary branch have the same structure; the first auxiliary branch comprises: a second diode module and a third switch module; the second diode module is connected with the third switch module in parallel; the inner machine first power line is connected to the anode of the second diode module; a cathode of the second diode module connected to the first output line; under the condition that the third switch module is closed, a connecting line between the first inner machine power line and the first output line is connected, and then the first inner machine power line and a connecting line between an outer machine power line connected with the first output line in the first outer machine power line and the second outer machine power line are connected.
In some embodiments, the external unit line sequence identification and alignment unit includes: the current flow direction detection module and the zero-live line power supply switching module; wherein, outer machine line preface discernment and alignment unit discerns the electric current flow direction of outer quick-witted first power cord with outer quick-witted second power cord, selects in first zero live wire communication power supply and the second zero live wire communication power supply correspond zero live wire communication power supply with the connecting wire switch-on between the outer quick-witted communication module, include: the current flow direction detection module is configured to identify current flow directions of the first power line and the second power line of the outdoor unit; the zero live wire power supply switching module is configured to select a connecting wire between a corresponding zero live wire communication power supply in the first zero live wire communication power supply and the second zero live wire communication power supply and the outdoor unit communication module to be connected based on the identified current flow direction of the first power line and the second power line of the outdoor unit.
In some embodiments, the current flow direction detection module comprises: the circuit comprises a first optical coupling module, a second optical coupling module, a third diode module, a fourth diode module, a first resistor module, a second resistor module, a third resistor module, a fourth resistor module, a fifth resistor module, a sixth resistor module, a first electrolytic capacitor module and a second electrolytic capacitor module; the first output terminal of the current flow direction detection structure is a collector electrode on the transistor side of the first optical coupling module; a second output terminal of the current flow direction detection structure is a collector electrode on the transistor side of the third optocoupler module; a direct current power supply is connected to a collector of a transistor side of the first optical coupling module after passing through the first resistor module, a diode side of the first optical coupling module is connected with the first electrolytic capacitor module and the fourth resistor module in parallel, an anode of the diode side of the first optical coupling module is connected with an anode of the first electrolytic capacitor module and a cathode of the third diode module, and a cathode of the first electrolytic capacitor module is connected with a second power line of the outdoor unit after passing through the sixth resistor module; the direct current power supply is connected to a collector of a transistor side of the second optical coupling module after passing through the third resistor module, a diode side of the second optical coupling module is connected with the second electrolytic capacitor module and the fifth resistor module in parallel, a cathode of the diode side of the second optical coupling module is connected with a cathode of the second electrolytic capacitor module and an anode of the fourth diode module, and an anode of the second electrolytic capacitor module is connected with a second power line of the external machine after passing through the sixth resistor module.
In some embodiments, the zero live line power switching module comprises: a first identification branch and a second identification branch; the first power line of the outdoor unit is connected to the communication module of the outdoor unit after passing through the first zero-live line communication power supply and the first identification branch; the second power line of the outdoor unit is connected to the communication module of the outdoor unit after passing through the second zero-live line communication power supply and the second identification branch; the first identification branch and the second identification branch have the same structure; the first identification branch comprises: the second protection module, the fifth diode module and the fourth switch module; the first power line of the outdoor unit is connected with the anode of the fifth diode module after passing through the first zero-live line communication power supply and the second protection module; and the cathode of the fifth diode module is connected to the outer machine communication module after passing through the fourth switch module.
In some embodiments, the first hot line communication power supply and the second hot line communication power supply are identical in structure; the first zero live line communication power supply comprises: the voltage stabilizing module, the third electrolytic capacitor module and the sixth diode module; the first power line of the outdoor unit is respectively connected to the anode of the voltage stabilizing module and the cathode of the third electrolytic capacitor module; the cathode of the voltage stabilizing module is connected to the anode of the sixth diode module; and the cathode of the sixth diode module is connected with the anode of the third electrolytic capacitor module and is connected to the zero-live wire power supply switching module.
In another aspect, the present invention provides a method for controlling a zero line sequence conditioning device of an air conditioner, including: controlling an inner machine zero-live wire reverse connection identification and alignment unit, identifying a zero line in a first inner machine power line and a second inner machine power line, and connecting a connecting line between the zero line in the first inner machine power line and the second inner machine power line and the inner machine communication module so as to connect the zero line in the first inner machine power line and the second inner machine power line into the communication current loop; controlling an inner machine and outer machine line sequence identification auxiliary unit, and under the condition that the zero line in the inner machine first power line and the inner machine second power line is connected into the communication current loop, connecting a power supply line where the zero line in the inner machine first power line and the inner machine second power line is located with a connecting line between the outer machine first power line and a corresponding outer machine power line in the outer machine second power line so as to connect the power supply line for supplying power to the outer machine by the inner machine; and controlling an outer machine line sequence identification and alignment unit, identifying the current flow direction of a first power line of the outer machine and a second power line of the outer machine under the condition of connecting a power supply line for supplying power to the outer machine by the inner machine, and selecting a connecting line between a corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply and the outer machine communication module to be connected so as to connect the corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply into the communication current loop.
Therefore, according to the scheme of the invention, the zero line detection circuit and the zero line selection switch are arranged on the indoor unit side, the zero line detection circuit is used for detecting the zero line and the live line of the indoor unit after the indoor unit is powered on, and the zero line communication module is connected through the zero line selection switch; an indoor unit and an outdoor unit are provided with an indoor unit and outdoor unit inner and outer unit line sequence detection module, an outdoor unit side is provided with a current flow direction detection circuit and a zero-live line power switching circuit, the current flow direction detection current is controlled to start under the condition that a zero line of the indoor unit is connected with the zero-live line communication module, the zero-live line sequence of the indoor unit and the zero-live line sequence of the outdoor unit are detected, and the zero-live line communication module of the outdoor unit side is connected through the zero-live line power switching circuit according to the detection result, so that the zero-live line of the indoor unit is detected and adjusted after the indoor unit is powered on, and the zero-live line sequence of the indoor unit and the zero-live line of the air conditioner are detected and adjusted after the outdoor unit is powered on, so that the zero-live line installation between the indoor unit of the air conditioner and the commercial power and between the indoor unit of the air conditioner and the commercial power is not required to be distinguished, the zero-live line, zero-live line assembly difficulty between the indoor unit of the air conditioner and the commercial power is greatly reduced, and the zero-live line between the indoor unit of the air conditioner and the commercial power, The difficulty of reassembling after zero-fire lines between the air conditioner internal and external units are assembled wrongly is large, and the risk of damaging the air conditioner can also occur.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a strong power supply filtering and rectifying circuit of an internal and external unit of an air conditioner in a related scheme;
fig. 2 is a schematic structural diagram of an embodiment of a three-wire system zero-live wire communication circuit of an air conditioner internal and external unit in a related scheme;
FIG. 3 is a schematic structural diagram of an embodiment of a zero line sequence conditioning device of an air conditioner according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a subscriber's commercial power-to-the-home wiring circuit in a related scheme;
FIG. 5 is a schematic diagram of an embodiment of a zero fire detection circuit in a correlation scheme;
FIG. 6 is a schematic diagram of the structure of the zero line identification circuit of the present invention;
fig. 7 is a schematic structural diagram of a zero-live wire reverse connection communication circuit between air-conditioning indoor and outdoor units in a related scheme, wherein (a) is a schematic structural diagram of a first embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units, (b) is a schematic structural diagram of a second embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units, and (c) is a schematic structural diagram of a third embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units;
fig. 8 is a schematic structural diagram of an embodiment of an indoor unit system of an air conditioner in a related art;
fig. 9 is a schematic structural view of an embodiment of an outdoor unit system of an air conditioner according to the related art;
FIG. 10 is a schematic structural diagram of an embodiment of a system for identifying and aligning the line sequence of an indoor unit of an air conditioner according to the present invention;
fig. 11 is a schematic structural diagram (inventive circuit) of an outdoor unit system of an air conditioner according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an internal and external machine wiring equivalent circuit of the present invention, wherein (a) is a schematic structural diagram of a first embodiment of the internal and external machine wiring equivalent circuit, (b) is a schematic structural diagram of a second embodiment of the internal and external machine wiring equivalent circuit, (c) is a schematic structural diagram of a third embodiment of the internal and external machine wiring equivalent circuit, and (d) is a schematic structural diagram of a fourth embodiment of the internal and external machine wiring equivalent circuit;
fig. 13 is a schematic view of an outdoor unit time-current curve according to the present invention, wherein (a) is a schematic view of a first embodiment of the outdoor unit time-current curve, (b) is a schematic view of a second embodiment of the outdoor unit time-current curve, and (c) is a schematic view of a third embodiment of the outdoor unit time-current curve;
FIG. 14 is a schematic diagram of a current flow direction detection circuit according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of an embodiment of a zero-fire line communication self-regulating circuit for an indoor unit and an outdoor unit of an air conditioner according to the present invention;
fig. 16 is a schematic flow chart illustrating a control method of the zero line sequence conditioning apparatus of the air conditioner according to an embodiment of the present invention;
fig. 17 is a schematic general structural diagram of an embodiment of the zero line sequence conditioning device of the air conditioner of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an embodiment of a strong power supply filtering and rectifying circuit of an internal and external unit of an air conditioner in a related scheme. As shown in fig. 1, after the zero line and live line (i.e., zero line N and live line L) of the air conditioner outdoor unit are wired, the protection circuit and the filter circuit are used for protection and filtering, the full-wave rectification is performed through the rectifier bridge, the stable direct current is formed after the filtering through the high-capacity electrolytic capacitor, and then the switching power supply is used for providing voltages with different requirements for the air conditioner outdoor unit. The large-capacity electrolytic capacitor is grounded GND.
In the example shown in fig. 1, in the strong power supply filtering and rectifying circuit of the air conditioner outdoor unit, the power supply part of the air conditioner outdoor unit is an AC-DC converter, and the alternating current does not directly supply power to the high-power device of the air conditioner outdoor unit. And a controller power supply, a cooling fan and the like in the air conditioner indoor and outdoor unit need direct current power supply. The alternating current only supplies power to the zero-live wire communication module. Besides the special requirement of the communication function on the connection method of the null line and the live line, the positive connection and the negative connection of the null line and the live line have no influence on the operation of other functions.
As can be seen from the example shown in fig. 1, the connection of the zero-live wire between the air conditioner indoor and outdoor units has no influence on the operation of other functions, except that the communication function has special requirements on the connection of the zero-live wire. Therefore, based on the principle, the normal and safe operation of the communication can be ensured only by changing the zero-live line sequence of the access communication part.
Fig. 2 is a schematic structural diagram of an embodiment of a three-wire system zero-live wire communication circuit of an air conditioner indoor unit and an air conditioner outdoor unit in a related scheme. As shown in fig. 2, in the three-wire system zero-live wire communication circuit of the indoor unit and the outdoor unit of the air conditioner, the indoor unit and the outdoor unit form a communication current loop through a zero wire N and a communication wire COM, the current limiting function of a resistor in the communication current loop, the one-way conductivity of a diode and the voltage clamping function of a zener diode protect an optocoupler in the communication current loop, ensure the stable operation of communication, and the outdoor unit provides a power supply for zero-live wire communication. In the example shown in fig. 2, the zero live communication power source is powered by zero live line voltage division.
In general, 220V alternating current AC is input into an air conditioner indoor unit, but the zero-live line of the indoor unit is connected reversely due to accidents or errors. Although the zero line and the live line of the indoor unit are reversely connected, the integrity of a communication current loop and the voltage of a communication power supply are not influenced, the voltage between the communication line COM and the zero line N is up to Ut which is 311V + U, the insulation voltage limit is easily exceeded, the electrical risk exists, and the PCB is easily broken down. Therefore, the zero-live wire between the indoor unit of the air conditioner and the mains supply is reversely connected, so that the voltage between the communication wire and the zero wire is too high, the PCB is easy to break down, and the insulation voltage limit is easily exceeded, so that the electrical risk exists.
In the example shown in fig. 2, it is necessary to ensure that the air conditioner live line communication module is correctly connected to the live line. The zero-fire line of the air conditioner zero-fire communication module comprises a zero-fire line between an indoor unit and an outdoor unit and a zero-fire line between the indoor unit and a mains supply.
Some schemes provide an automatic zero-live line communication alignment circuit and a control method thereof, the detection control method is safe and reliable, but all switches used in the method are normally open switches, and the normally open switches are large in switch rated current, high in cost and large in switch volume. In addition, the normally open switch is in a disconnected state after being electrified, and cannot provide voltage for a subsequent circuit, so that a switch driving power supply needs to be additionally designed, and the short circuit protection is realized by setting the switch to be in a delayed conduction and turn-off state in a program so as to avoid the short circuit of the zero line and the live line. And the zero-live line sequence is fixed after the outdoor unit is installed, and is not changed, and a dead zone formed by switch delay is not required to be set. In addition, the zero live line detection circuit has certain electrical risks and leakage current risks.
In consideration of the above, the electrical safety problem of the communication module due to the fact that zero and live wires between the indoor unit and the commercial power are reversely connected can cause local over-high voltage. And the problem that communication faults are caused by reverse zero-live wire connection between the indoor unit and the outdoor unit also exists. Therefore, the scheme of the invention provides a zero-live wire sequence self-conditioning circuit for an internal and external machine of an air conditioner and a control method thereof.
According to an embodiment of the invention, a zero line sequence conditioning device of an air conditioner is provided. Referring to fig. 3, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The air conditioner is provided with an inner unit and an outer unit. An inner machine communication module (namely an inner machine zero-fire wire communication module) is arranged on the inner machine side, namely a zero-fire wire communication module in an air conditioner inner machine system. And an outer machine communication module (namely an outer machine zero-live wire communication module) is arranged on the outer machine side, namely a zero-live wire communication module in an air conditioner outer machine system. The power cord of the internal machine includes: the first power line of the inner machine and the second power line of the inner machine are a live wire, and one power line of the inner machine is a zero line. The power cord of the outdoor unit includes: the power supply system comprises an outer machine first power line and an outer machine second power line, wherein one of the outer machine first power line and the outer machine second power line is a live wire, and the other outer machine power line is a zero line. The first power line of the inner unit may be connected to one of the first power line of the outer unit and the second power line of the outer unit, and the second power line of the inner unit may be connected to the other of the first power line of the outer unit and the second power line of the outer unit. The outdoor unit is provided with a first zero-live wire communication power supply and a second zero-live wire communication power supply. The positive electrode of the zero-live wire communication power supply is connected to the first power line of the outer machine, and the negative electrode of the zero-live wire communication power supply is connected to the second power line of the outer machine. The outer machine communication module and the inner machine communication module can be connected through a power line and a communication line to form a communication current loop.
Zero line order of fire line of air conditioner is taked care of and is put, includes: the system comprises an inner machine zero-live wire reverse connection identification and alignment unit, an inner machine line sequence identification auxiliary unit and an outer machine line sequence identification and alignment unit. An internal machine zero and live wire reverse connection identification and adjustment unit, such as an internal machine zero and live wire reverse connection identification and adjustment circuit shown in fig. 10. An internal and external machine thread sequence identification auxiliary unit, such as an internal and external machine thread sequence identification auxiliary circuit shown in fig. 10. An external unit line sequence identification and alignment unit, such as an external unit line sequence identification and alignment circuit shown in fig. 11. The inner machine first power line and the inner machine second power line are respectively connected with the inner machine zero-live wire reverse connection identification and alignment unit and the inner machine and outer machine line sequence identification auxiliary unit. And a first output line and a second output line of the internal and external unit line sequence identification auxiliary unit can be correspondingly connected with the first power line and the second power line of the external unit. And the first power line and the second power line of the external unit are connected with the line sequence identification and alignment unit of the external unit. The indoor unit zero and live wire reverse connection identification and alignment unit is connected with the outdoor unit line sequence identification and alignment unit through a communication line.
The indoor unit zero-live wire reverse connection identification and alignment unit is configured to identify a zero line in the indoor unit first power line and the indoor unit second power line and enable a connecting line between the zero line in the indoor unit first power line and the indoor unit second power line and the indoor unit communication module to be connected so as to enable the zero line in the indoor unit first power line and the indoor unit second power line to be connected into the communication current loop.
The inner machine and outer machine line sequence identification auxiliary unit is configured to connect a power supply line where a zero line in the inner machine first power line and the inner machine second power line is located with a connecting line between the outer machine first power line and a corresponding outer machine power line in the outer machine second power line under the condition that the zero line in the inner machine first power line and the inner machine second power line are connected into the communication current loop, so as to connect the power supply line for supplying power to the outer machine by the inner machine. The first output line and the second output line of the auxiliary unit for identifying the line sequence of the internal and external units can be correspondingly connected with the first power line and the second power line of the external unit. Therefore, a power supply line where the zero line in the first power line of the internal machine and the second power line of the internal machine are located is connected with a corresponding external machine power line in the corresponding connection of the first power line of the external machine and the second power line of the external machine through a corresponding output line in the first output line and the second output line of the internal and external machine line sequence identification auxiliary unit.
The outer machine line sequence identification and adjustment unit is configured to identify current flow directions of a first power line and a second power line of the outer machine under the condition that a power supply line for supplying power to the outer machine by the inner machine is connected, and select a connecting line between a corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply and the outer machine communication module to be connected, so that the corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply is connected into the communication current loop.
According to the zero-live wire sequence self-conditioning circuit for the indoor unit and the outdoor unit of the air conditioner and the control method thereof, the zero-live wires between the indoor unit of the air conditioner and the commercial power and between the indoor unit and the outdoor unit of the air conditioner do not need to be distinguished, the installation difficulty is reduced, the problem caused by reverse connection of the zero-live wires is solved, and the installation efficiency is improved. And, use unique circuit structure discernment zero live wire, thereby can effectively reduce electrical risk and electric leakage problem and promote the security performance, can also reduce extra device use cost low.
In some embodiments, the internal line-zero-line reverse connection identification and alignment unit includes: the zero line detection module is like a zero line detection circuit, and the zero line selection module is like a zero line selection switch circuit. The zero line detection module and the zero line selection module are sequentially connected to the inner machine communication module. The zero line detection module, the zero line selection module and the internal unit communication module are respectively connected with the MCU.
Wherein, interior machine zero live wire transposition discernment and alignment unit discerns first power cord of interior machine with the zero line in the interior machine second power cord to make first power cord of interior machine with zero line in the interior machine second power cord with the connecting wire switch-on between the interior machine communication module, include:
the zero line detection module is configured to identify a zero line in the inner machine first power line and the inner machine second power line.
The zero line selection module is configured to connect a connecting line between the zero line in the first power line and the second power line of the inner machine and the inner machine communication module based on the identified zero line in the first power line and the second power line of the inner machine.
Fig. 7 is a schematic structural diagram of a zero-live wire reverse connection communication circuit between air-conditioning indoor and outdoor units in a related scheme, where (a) is a schematic structural diagram of a first embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units, (b) is a schematic structural diagram of a second embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units, and (c) is a schematic structural diagram of a third embodiment of the zero-live wire reverse connection communication circuit between the air-conditioning indoor and outdoor units. As shown in fig. 7, in the three-wire system zero-live wire communication circuit of the indoor unit and the outdoor unit of the air conditioner shown in fig. 2, when the zero-live wire is reversely connected, although the zero-live wire can charge the communication power supply, the indoor unit and the outdoor unit cannot form a communication current loop through the zero wire N and the communication wire COM, so that the reverse connection of the zero-live wire can cause the communication function of the zero-live wire to be invalid, and further cause the air conditioner to not work normally. Therefore, aiming at the problem that the communication fault of the indoor unit and the outdoor unit cannot work due to the reverse connection of the zero line and the live line between the indoor unit and the outdoor unit of the air conditioner, the zero line and the live line of the communication current source of the outdoor unit of the air conditioner must be correctly connected.
Fig. 8 is a schematic structural diagram of an embodiment of an indoor unit system of an air conditioner in the related art. In the air conditioning indoor unit system shown in fig. 8, in general, 220V AC power is input to the air conditioning indoor unit, and the indoor unit is supplied with power through a strong electric filter, a rectifier bridge (not shown in fig. 8), a filter capacitor, and a switching power supply. Wherein, the switch K-1 and the switch K-2 play a role in controlling the power supply of the outdoor unit of the air conditioner. And the zero line and live line communication module is controlled by the MCU and is connected with the zero line and the live line.
Fig. 9 is a schematic structural diagram of an embodiment of an outdoor unit system of an air conditioner in the related art. In the air conditioner outdoor unit system shown in fig. 9, the air conditioner outdoor unit generally receives 220V AC power from the indoor unit, and supplies power to the outdoor unit through a strong electric filter, a rectifier bridge (not shown in fig. 9), a filter capacitor, and a switching power supply. And the communication of the zero line and live line communication module is controlled by the MCU and is connected with the zero line and the live line.
Fig. 10 is a schematic structural diagram of an air conditioning indoor unit line sequence identification and alignment system according to an embodiment of the present invention. As shown in fig. 10, the system for identifying and adjusting the line sequence of the indoor unit of the air conditioner according to the present invention includes: the system comprises an internal machine and an external machine which need an identification auxiliary circuit, an internal machine zero and live wire reverse connection identification and alignment circuit, a strong current rectification filter circuit, a bus capacitor and a switching power supply.
In the scheme of the invention, diodes are connected in series on the live wire between the indoor unit and the outdoor unit selectively after the indoor unit is started, and then the current flow direction is detected by the current flow direction detection circuit on the outdoor unit so as to judge the zero live wire sequence between the indoor unit and the outdoor unit.
In the example shown in fig. 10, the AC power supply AC is connected to the switching power supply through the connection terminal a and the connection terminal B, and then connected to the current identification auxiliary circuit for the internal and external units and the reverse connection identification and adjustment circuit for the zero line and live line of the internal unit, respectively.
In some embodiments, the neutral detection module includes: the device comprises a first switch module, a current limiting module, a bidirectional diode module, a capacitor module and a signal acquisition and processing module. The first switch module is, for example, a switch K-N, the current limiting module is, for example, a protection resistor RS, the bidirectional diode module is, for example, the bidirectional diode in fig. 6, and the capacitor module is, for example, the capacitor C in fig. 6.
And taking any one of the first power line of the inner machine and the second power line of the inner machine as an inner machine detection line. After the internal machine detection passes through the first switch module and the current limiting module, the internal machine detection is connected to the first end of the bidirectional diode module and the first end of the capacitor module on the one hand, and is connected to the first end of the signal acquisition processing module on the other hand. And the second ends of the bidirectional diode module and the capacitor module are connected to the second end of the signal acquisition and processing module. And the second end of the bidirectional diode module is also connected with the shell. And the third end of the signal acquisition processing module is used as an output end and is used for outputting a zero line detection result to a controller (such as an MCU) of the air conditioner. And the fourth end of the signal acquisition processing module is connected with a direct current power supply (such as VCC/2).
In the bidirectional diode module, the anode of the first diode is connected with the cathode of the second diode, and the cathode of the first diode is connected with the anode of the second diode. The signal acquisition processing module adopts a differential amplification circuit.
And under the condition that the first switch module is closed, the signal acquisition processing module outputs a zero line detection result that the inner machine detection line is a live line or a zero line.
Fig. 4 is a schematic structural diagram of an embodiment of a subscriber's commercial power-to-the-home wiring circuit in the related art. As shown in fig. 4, the three-phase high voltage is transformed into single-phase 220V mains through a transformer. The zero line N is connected with the ground, and the shell PE of the electrical appliance is connected with the ground, so that the zero line N and the shell PE are equipotential. And a potential difference exists between the live wire L and the shell PE, and a potential difference does not exist between the zero line N and the shell PE. According to the characteristic principle, the zero line and the live line can be distinguished. Wherein, COM is a communication line.
According to the regulations of national standard GB8218 'Low-voltage electricity tester', the voltage of a neon bulb of the test pencil is not lower than 50V but not higher than 90V, and the working current of the neon bulb is not more than 0.4mA but not less than 0.1 mA. Therefore, the resistance value of the current-limiting resistor in the test pencil for the low-voltage distribution system of 1 to 500V is between 1 and 5 MOmega. The current which can be felt by people is more than 1 milliampere, and the current which causes electric shock is more than 10 milliamperes and is far more than 0.14 milliamperes.
Thus, it can be concluded that: when the test pencil is used, current passes through a human body, but the current is too weak, so people cannot feel the current at all and even cannot get an electric shock. Therefore, if the passing detection current is limited to be lower than the human body safety current, the electrical safety specification can be met.
Fig. 5 is a schematic structural diagram of an embodiment of a zero fire detection circuit in the correlation scheme. In the zero live line detection circuit shown in fig. 5, the live line L is divided and limited by the resistors R1 and R2 to provide a working voltage for the optical coupling module OP. However, the input current of the optical coupling module OP is generally large and exceeds 1mA, and the current flowing through the resistor R1 is much larger than 1mA, so the leakage current of the live wire L is too large, and the live wire L is connected to the casing through the resistor R1 and the resistor R2, if the casing is grounded, the potential of the whole casing and the live wire L is equal, and the casing is electrified, so that a large electrical risk exists.
The zero line detection circuit in the example shown in fig. 10 corresponds to the zero line recognition circuit shown in fig. 6. Fig. 6 is a schematic structural diagram of the zero line identification circuit of the present invention. As shown in fig. 6, the zero line identification circuit needs to detect a zero line according to leakage current and electrical risk brought by the zero line detection circuit, and then the zero line is connected to the zero line and live line communication circuit to complete establishment of a communication loop (i.e., a communication current loop). In consideration of the fact that the zero line detection needs to enable the zero line and the live line to form a loop with the casing, and electrical risks exist, in the scheme of the invention, a sufficiently large current-limiting protection resistor RS and a relay switch K-N need to be arranged in the zero line identification circuit.
In the scheme of the invention, the potential risk of electric shock is reduced by adopting the current limiting function of the high-resistance resistor in the zero line identification circuit, the operational amplifier circuit collects the voltage at two ends of the diode, and the control switch is connected in series in the zero line detection circuit and only carries out detection after the zero line detection circuit is electrified for the first time.
In the zero line identification circuit shown in fig. 6, the detection terminal a (D) is connected to the anode of the diode D on the one hand, and connected to the first terminal of the capacitor C on the other hand after passing through the switch K-N and the current-limiting protection resistor RS, and then connected to the first terminal of the signal acquisition and processing module in a square. The cathode of the diode D is connected with the shell, the second end of the capacitor C is connected with the cathode of the diode D, and the second end of the capacitor C is also connected with the signal acquisition processing moduleA second end of the block. And another diode is connected between the diode D and the capacitor C in parallel, the anode of the diode is connected with the cathode of the diode D, the cathode of the diode is connected with the anode of the diode D, and the diode D form a bidirectional diode. In the signal acquisition processing module, a first end of the signal acquisition processing module is connected to an inverting input end of the operational amplifier after passing through a resistor R. The second end of the signal acquisition processing module is connected to the non-inverting input end of the operational amplifier through another resistor R. The inverting input terminal of the operational amplifier is also connected with a resistor R f And then the output end of the operational amplifier is connected to the output end of the operational amplifier, and the output end of the operational amplifier is used as an AD signal sampling end. The non-inverting input terminal of the operational amplifier is connected with the other resistor R f And a rear ground power supply VCC/2. The switch K-N may be a relay switch.
In the example shown in fig. 6, the diode D has unidirectional conductivity and the voltage drop is very low, approximately U D V (different voltage drops depending on the type of diode). The capacitor C is an energy storage capacitor, and the signal acquisition processing module is a differential amplification circuit.
In the example shown in fig. 6 (b), the bidirectional diode is used to detect that if a (d) detected by the detection terminal a (d) is live, the voltage of the capacitor C when the diode is turned on in the first half period of the alternating current is about U D And V, when the highest voltage of the capacitor in the latter half period of the alternating current of the detection end is up to 311V, in order to protect the circuit safety of the capacitor C and a signal acquisition processing module behind the capacitor C and reduce the voltage at two ends of the capacitor C, a mode that diodes are connected in parallel in a reverse direction to form a bidirectional diode is adopted to solve the problem.
In the example shown in fig. 6, if the line a on which the zero line identification circuit is located is the zero line, the voltage across the diode D is 0V, and the voltage at the sampling end of the AD signal is VCC/2V.
In the example shown in fig. 6, if the line a on which the neutral line identification circuit is located is the live line, the voltage across the diode D is about ± U D V (varying with AC voltage), voltage sampling of ± (R) f /R)*U D +VCC/2V。
In the example shown in fig. 6, when the relay switch K-N is closed, the current passing through the protection resistor (i.e., the current limiting protection resistor RS) is as small as possible, and it is concluded from the example shown in fig. 4 that the protection resistor (i.e., the current limiting protection resistor RS) can perform the protection function. At the moment, the two ends of the diode D have stable voltage, and stable acquisition of the acquired signals by the zero line identification circuit can be ensured. After the zero line identification is finished, the relay switch K-N is immediately switched off, so that the electrical safety can be ensured to the greatest extent possible.
In some embodiments, the neutral line selection module includes: the first zero line selection branch and the second zero line selection branch. The first power line of the inner machine is connected to the communication module of the inner machine after passing through the first zero line selection branch, and the second power line of the inner machine is connected to the communication module of the inner machine after passing through the second zero line selection branch.
The first zero line selection branch and the second zero line selection branch have the same structure. The first zero line selection branch comprises: the protection circuit comprises a first diode module, a first protection module and a second switch module. The first diode module is shown as diode D in the air-conditioning unit in fig. 15, the first protection module is shown as resistor R in the air-conditioning unit in fig. 15, and the second switch module is shown as switch K-3 or switch K-4 in the air-conditioning unit in fig. 15. Wherein the content of the first and second substances,
the inner machine first power line is connected to the cathode of the diode module. And the anode of the first diode module is connected to the internal machine communication module after passing through the first protection module and the second switch module.
And under the condition that the second switch module is closed, the first power line of the inner machine is connected to the inner machine communication module.
The zero line selection switch in the example shown in fig. 10 corresponds to the zero line selection and protection circuit portion in the right half of the air conditioner indoor and outdoor unit zero line communication self-regulating circuit shown in fig. 15. Fig. 15 is a schematic structural diagram of an embodiment of a zero-fire line communication self-regulating circuit of an air conditioner indoor unit and outdoor unit according to the present invention. In the example shown in fig. 15, the air conditioner indoor unit is provided with a zero line selection and inclusion circuit and a communication simplification circuit. In the communication simplified circuit, a resistor and a diode are arranged in series, one end of the resistor, which is far away from the anode of the diode, is connected to a communication line COM, and the cathode of the diode is connected to a zero line selection and protection circuit. The zero line selection and protection circuit is provided with two paths, each path is formed by connecting a switch, a resistor R and a diode D in series, the anode of the diode D is connected with the switch, the cathode of the diode D is connected with a wiring terminal, and the switch is connected with a communication simplification circuit. Two switches such as switch K-3 and switch K-4. The cathode of the diode D in one path is connected to the connecting terminal A, and the cathode of the diode D in the other path is connected to the connecting terminal B.
In some embodiments, the internal and external machine thread order identification assisting unit includes: a first auxiliary branch and a second auxiliary branch. The first power line of the inner machine is connected to a first output line through the first auxiliary branch, and the second power line of the inner machine is connected to a second output line through the second auxiliary branch. The first output line may be connected to one of the first power line of the outdoor unit and the second power line of the outdoor unit. The second output line may be connected to the other of the first power line of the outdoor unit and the second power line of the outdoor unit. The first power line of the inner machine is as line a, the second power line of the inner machine is as line B, the first output line is as line D, the second output line is as line C, the first power line of the outer machine is as line E, and the second power line of the outer machine is as line F.
Wherein the first auxiliary branch and the second auxiliary branch have the same structure. The first auxiliary branch comprises: the second diode module and the third switch module. The second diode module is a diode in fig. 10, and the third switch module is a switch K-1 or a switch K-2 in fig. 10. The second diode module is connected in parallel with the third switch module. The inner machine first power line is connected to the anode of the second diode module. And the cathode of the second diode module is connected to the first output line.
Under the condition that the third switch module is closed, a connecting line between the first inner machine power line and the first output line is connected, and then the first inner machine power line and a connecting line between an outer machine power line connected with the first output line in the first outer machine power line and the second outer machine power line are connected.
In the example shown in fig. 10, the internal/external machine identification support circuit includes: MCU, switch K-1, switch K-2, diode D1 and diode D2. Interior zero live wire reversal discernment and alignment circuit includes: zero live wire communication module, zero line select switch and zero line detection circuitry.
The first end of the zero line detection circuit is connected to the MCU, the second end of the zero line detection circuit is respectively connected to the wiring terminal A, the first end of the zero line selection switch and the anode of the diode D1, and the third end of the zero line detection circuit is connected to the casing. And the second end of the zero line selector switch is respectively connected to the wiring terminal B and the anode of the diode D2, the third end of the zero line selector switch is connected with the first end of the zero line and live wire communication module, and the fourth end of the zero line selector switch is connected with the MCU. And the second end of the zero-live wire communication module is connected with a communication wire COM, and the third end of the zero-live wire communication module is connected with an MCU. Switch K-1 is connected in parallel with diode D1, and the cathode of diode D1 is connected to terminal D. Switch K-2 is connected in parallel with diode D2, and the cathode of diode D2 is connected to terminal C. Binding post C and binding post D homophase air conditioner outer machine.
In the scheme of the invention, the zero line is connected into the zero-live line communication loop of the indoor unit by adopting the selection switch. In the line sequence identification and alignment system of the air conditioning indoor unit shown in fig. 10, diodes (such as diode D1 and diode D2) are added to perform the function of unidirectional conduction compared with the indoor unit side in the related scheme. The zero line identification circuit can identify the zero line and the live line of the connected line. The zero line selection switch is connected with the zero line for the zero line communication module. Since the diodes of the connection terminal D (e.g., the diode D1 and the diode D2) and the diodes of the connection terminal C (e.g., the diode D1 and the diode D2) are connected in the same direction in series, current cannot pass when the switch K-1 and the switch K-2 are simultaneously turned off. When the switch K-1 and the switch K-2 are closed simultaneously, the diodes (such as the diode D1 and the diode D2) are short-circuited, the alternating current can normally pass through, and the structure formed by the diode D1 and the diode D2 can also play a role of a switch. When one of the switches K-1 and K-2 is closed and the other is opened, the unidirectional flow of current can be realized.
In some embodiments, the external unit line sequence identification and alignment unit includes: the current flows to the detection module and the zero live wire power supply switching module. The current flow direction detection module is used for detecting the current flow direction, such as a current flow direction detection circuit, and the zero-live line power supply switching module is used for detecting the zero-live line power supply switching circuit. The current flow direction detection module and the zero-live line power supply switching module are respectively connected with the first power supply line of the outdoor unit and the second power supply line of the outdoor unit. The current flow direction detection module and the zero-live line power supply switching module are also sequentially connected to the outer machine communication module.
Wherein, outer machine line preface discernment and alignment unit discerns the electric current flow direction of outer quick-witted first power cord with outer quick-witted second power cord, selects in first zero live wire communication power supply and the second zero live wire communication power supply correspond zero live wire communication power supply with the connecting wire switch-on between the outer quick-witted communication module, include:
the current flow direction detection module is configured to identify current flow directions of the first power line and the second power line of the outdoor unit.
The zero-live wire power supply switching module is configured to select a corresponding zero-live wire communication power supply of the first zero-live wire communication power supply and the second zero-live wire communication power supply to be connected with the outer unit communication module based on the identified current flow directions of the first power line and the second power line of the outer unit.
Fig. 11 is a schematic structural diagram of an air conditioning outdoor unit system according to an embodiment of the present invention. As shown in fig. 11, in order to solve the problem of adjusting the circuit cost after the zero-fire line is reversely connected between the indoor unit and the outdoor unit, the air conditioner outdoor unit system provided by the present invention includes: the circuit comprises a strong current rectifying and filtering circuit, a bus capacitor, a switching power supply and an external machine line sequence identification and alignment circuit.
In the example shown in fig. 11, the connection terminals E and F are connected to the switching power supply through the strong current rectifying and filtering circuit and the bus capacitor, and are connected to the external line sequence recognition and alignment circuit.
In the example shown in fig. 11, the external unit line sequence identification and alignment circuit includes: the device comprises a current flow direction detection circuit, an MCU, a zero-live wire power supply switching circuit and a zero-live wire communication module. The current flow direction detection circuit and the zero-live line power supply switching circuit are respectively connected to the wiring terminal E and the wiring terminal F. The current flow direction detection circuit, the MCU, the zero-live line power supply switching circuit and the zero-live line communication module are sequentially connected. And the communication line COM is connected to the zero-live wire communication module. The current flow direction detecting circuit in fig. 11 corresponds to the current flow direction detecting circuit shown in fig. 14, and the zero-live line power switching circuit in fig. 11 corresponds to the air conditioner indoor and outdoor machine zero-live line communication self-regulating circuit shown in fig. 15).
In the example shown in fig. 11, the current flow detection circuit detects the current flow of the EF line (i.e., the line in which the terminal E and the terminal F are located) at the time of power-on. The zero-live wire power supply switching circuit can provide correct power supply for the zero-live wire communication module.
Comparing the example shown in fig. 8 with the example shown in fig. 9 and the example shown in fig. 10 with the example shown in fig. 11, it is clear that the examples shown in fig. 10 and 11 use fewer components and are less expensive than the examples shown in fig. 8 and 9.
Fig. 12 is a schematic structural diagram of an internal/external machine wiring equivalent circuit of the present invention, where (a) is a schematic structural diagram of a first embodiment of the internal/external machine wiring equivalent circuit, (b) is a schematic structural diagram of a second embodiment of the internal/external machine wiring equivalent circuit, (c) is a schematic structural diagram of a third embodiment of the internal/external machine wiring equivalent circuit, and (d) is a schematic structural diagram of a fourth embodiment of the internal/external machine wiring equivalent circuit. Referring to the example shown in FIG. 12, there are two types of wiring between the internal and external machines, E-D, F-C and E-C, F-D. Two wiring modes, namely positive connection and reverse connection, exist between the internal machine and the commercial power. The first rule in fig. 12 is: a diode is connected in series in a circuit where the live wire is located, and the direction of the diode is L to N. The second rule is: because the unidirectional and unidirectional conductivity of the diode ensures that the current of the line on which the diode is positioned is constant, the zero live wire in the outdoor unit can be identified.
The following method can be designed according to the above rules: and the zero line is identified by the zero line identification circuit, the MCU controls the switch K-1 or the switch K-2 where the zero line is positioned to be closed, the diode where the zero line is positioned is short-circuited, and the diode where the live wire is positioned is connected in series into the circuit. A similar effect as in fig. 12 can be achieved. At this time, the current direction in the outdoor unit is detected, and the zero-live line sequence in the outdoor unit can be obtained.
Fig. 13 is a schematic diagram of an outdoor unit time-current curve according to the present invention, wherein (a) is a schematic diagram of a first embodiment of the outdoor unit time-current curve, (b) is a schematic diagram of a second embodiment of the outdoor unit time-current curve, and (c) is a schematic diagram of a third embodiment of the outdoor unit time-current curve. As shown in the time-current graph of the external unit shown in fig. 13, the current curve corresponding to (a) in fig. 13 corresponds to the circuit structure of the equivalent circuit diagram of the internal and external unit connection in (a) (d) in fig. 12. The current curve corresponding to (b) in fig. 13 corresponds to the circuit structure of the internal/external machine connection equivalent circuit diagram of (b) (c) in fig. 12. Fig. 13 (c) is a schematic diagram of a curve of a normal alternating current after the switch K-1 and the switch K-2 of the indoor unit are closed and the two diodes are short-circuited. Switch K-1 and switch K-2 may both be relay switches.
In some embodiments, the current flow detection module comprises: the photoelectric module comprises a first optical coupling module, a second optical coupling module, a third diode module, a fourth diode module, a first resistor module, a second resistor module, a third resistor module, a fourth resistor module, a fifth resistor module, a sixth resistor module, a first electrolytic capacitor module and a second electrolytic capacitor module. The optical coupling module comprises a first optical coupling module OP1 shown in fig. 14, a second optical coupling module OP2 shown in fig. 14, a third diode module shown as a diode D-1 shown in fig. 14, a fourth diode module shown as a diode D-2 shown in fig. 14, a first resistor module shown as a resistor R3-1 shown in fig. 14, a second resistor module shown as a resistor R1 shown in fig. 14, a third resistor module shown as a resistor R3-2 shown in fig. 14, a fourth resistor module shown as a resistor R shown in fig. 14, a fifth resistor module shown as another resistor R shown in fig. 14, a sixth resistor module shown as a resistor R2 shown in fig. 14, a first electrolytic capacitor module shown as an electrolytic capacitor shown in fig. 14, and a second electrolytic capacitor module shown in fig. 14.
Wherein, the first output terminal (e.g. terminal e-1) of the current flow direction detection structure is a collector electrode on the transistor side of the first optical coupling module. The second output terminal (e.g. terminal e-2) of the current flow detection arrangement is the transistor-side collector of said third opto-coupler module.
The direct current power supply is connected to a collector of a transistor side of the first optical coupling module after passing through the first resistor module, an emitter of the transistor side of the first optical coupling module is grounded, a diode side of the first optical coupling module is connected with the first electrolytic capacitor module and the fourth resistor module in parallel, an anode of the diode side of the first optical coupling module is connected with an anode of the first electrolytic capacitor module and a cathode of the third diode module, and a cathode of the first electrolytic capacitor module is connected with a second power line of the external machine after passing through the sixth resistor module.
The direct current power supply is connected to a collector of a transistor side of the second optical coupling module after passing through the third resistance module, an emitter of the transistor side of the second optical coupling module is grounded, a diode side of the second optical coupling module is connected with the second electrolytic capacitor module and the fifth resistance module in parallel, a cathode of the diode side of the second optical coupling module is connected with a cathode of the second electrolytic capacitor module and an anode of the fourth diode module, and an anode of the second electrolytic capacitor module is connected with a second power line of the external machine after passing through the sixth resistance module.
Fig. 14 is a schematic structural diagram of a current flow direction detection circuit according to an embodiment of the present invention. As shown in fig. 14, in the current flow direction detection circuit in the solution of the present invention, the dc power VCC is connected to the collector of the transistor side of the optical coupling module OP1 through the resistor R3-1, and the emitter of the optical coupling module OP1 is grounded. The anode of the diode side of the optical coupling module OP1 is connected to the cathode of the diode D-1, the anode of an electrolytic capacitor and the first end of a resistor R, the cathode of the diode side of the optical coupling module OP1 is connected to the cathode of an electrolytic capacitor, the second end of a resistor R, the second end of another resistor R, the anode of another electrolytic capacitor, the anode of the diode side of the optical coupling module OP2 and the first end of a resistor R2, and the second end of the resistor R2 is connected to the connection terminal F. The connection terminal E is connected, via a resistor R1, to the anode of the diode D-1 on the one hand and to the cathode of the diode D-2 on the other hand. And the anode of the diode D-2 is respectively connected to the first end of the other resistor R, the cathode of the other electrolytic capacitor and the cathode of the diode side of the optical coupling module OP 2. The emitter of the diode side of the opto-coupler module OP2 is grounded GND. The dc power VCC is coupled to the transistor-side collector of the optical coupling module OP2 via a resistor R3-2. The common end of the resistor R3-1 and the optical coupling module OP1 is an e-1 end, and the common end of the resistor R3-2 and the optical coupling module OP2 is an e-2 end.
In the example shown in fig. 14, the current flow detection circuit is connected in parallel to both ends of EF, and when the current flows from E to F, E-1 changes from high level to low level, and the line on which E is located is the live line. When the current flows from F to E, E-2 is changed from high level to low level, and the line where F is located is the live line. At this time, the current direction in the outdoor unit is detected, and the zero-live line sequence in the outdoor unit can be obtained.
In some embodiments, the zero live line power switching module comprises: a first identification branch and a second identification branch. And the first power line of the outdoor unit is connected to the outdoor unit communication module after passing through the first zero-live line communication power supply and the first identification branch. And the second power line of the outdoor unit is connected to the communication module of the outdoor unit after passing through the second zero-live line communication power supply and the second identification branch.
The first identification branch and the second identification branch have the same structure. The first identification branch comprises: the protection device comprises a second protection module, a fifth diode module and a fourth switch module, wherein the second protection module is a resistor R of the air conditioner outdoor unit in a figure 15, the fifth diode module is a diode D of the air conditioner outdoor unit in a figure 15, and the fourth switch module is a switch K-5 or a switch K-6 of the air conditioner outdoor unit in a figure 15. And the first power line of the outdoor unit is connected with the anode of the fifth diode module after passing through the first zero-live line communication power supply and then passing through the second protection module. And the cathode of the fifth diode module is connected to the external unit communication module after passing through the fourth switch module.
As shown in fig. 15, in the zero-live wire communication self-regulating circuit for the air conditioner indoor unit and outdoor unit in the solution of the present invention, a communication simplification circuit, a communication power selection switch and a protection circuit, and a dual communication power supply are provided in the air conditioner outdoor unit. In the communication simplified circuit, a resistor and a diode are arranged in series, one end of the resistor, which is far away from the anode of the diode, is connected to the communication power supply selection switch and the protection circuit, and the cathode of the diode is connected to the communication line COM. Two paths are arranged in the communication selection switch and the protection circuit, each path is formed by connecting a switch, a diode D and a resistor R in series, the cathode of the diode D is connected with the switch, the anode of the diode D is connected with the resistor R, and the switch is connected with the communication simplification circuit. Two switches such as switch K-5 and switch K-6. One path of resistor is connected to a power supply 1 in the dual-communication power supply, the other path of resistor is connected to a power supply 2 in the dual-communication power supply, and a resistor Rb is arranged between the power supply 1 and the power supply 2. In the power supply 1, anodes of the zener diode ZD1 are connected to the connection terminal E and the cathode of an electrolytic capacitor C1, respectively, an anode of an electrolytic capacitor C1 is connected to the communication power supply selection switch and protection circuit, respectively, and the cathode of a diode D1, and the cathode of the zener diode ZD1 is connected to the anode of the diode D1. In the power supply 2, anodes of the zener diode ZD2 are connected to the connection terminal F and the cathode of the other electrolytic capacitor C2, respectively, anodes of the other electrolytic capacitor C2 are connected to the communication power supply selection switch and the protection circuit, respectively, and the cathode of the other diode D1, and the cathode of the zener diode ZD1 is connected to the anode of the other diode D1.
The diode is connected in series in the live wire between the indoor unit and the outdoor unit by utilizing the unidirectional conductivity of the diode, so that the current flow direction detection circuit in the outdoor unit identifies the line sequence of the zero live wire between the indoor unit and the outdoor unit. In preparation for the selection of the subsequent communication power supply (the selection of the communication power supply in the example shown in fig. 15). In the scheme of the invention, a complete communication circuit is constructed by designing a dual-communication power supply and controlling and correctly connecting the power supply into a communication loop of an external unit. In the switched short circuit protection circuit, the switch may be a relay switch. D in the internal and external units is a protection diode, the resistor R plays a role in limiting current in the communication process and mainly prevents short circuit caused by misconduction of the relay switch K-5, the relay switch K-6, the relay switch K-3 and the relay switch K-4.
As can be seen from the examples shown in fig. 14 and 15, when the air conditioner indoor unit or outdoor unit is connected in reverse direction with zero-live wire, it is only necessary to ensure that the zero-live wire of the air conditioner zero-live communication module is correctly connected.
In some embodiments, the first hot line communication power supply and the second hot line communication power supply are identical in structure. The first zero live line communication power supply comprises: the voltage stabilizing module, the third electrolytic capacitor module and the sixth diode module. And the first power line of the outdoor unit is respectively connected to the anode of the voltage stabilizing module and the cathode of the third electrolytic capacitor module. The cathode of the voltage stabilization module is connected to the anode of the sixth diode module. And the cathode of the sixth diode module is connected with the anode of the third electrolytic capacitor module and is connected to the zero-live wire power supply switching module.
In the example shown in fig. 15, the dual communication power supplies on the external unit side have a symmetrical structure, and output voltages are equal. The resistor Rb is a voltage dividing resistor. The zener diode ZD1 and the zener diode ZD2 are zener diodes, and play a role of voltage stabilization. When the voltage between the line E and the line F is a positive value, the zener diode ZD1 is turned on in the forward direction to become a normal diode, and the zener diode ZD2 breaks down in the reverse direction to operate in a regulated state, and starts to charge the electrolytic capacitor C2. When the voltage between the line E and the line F is a negative value, the zener diode ZD1 breaks down in the reverse direction, operates in a regulated state, starts to charge the electrolytic capacitor C1, and the zener diode ZD2 is turned on in the forward direction to become a normal diode. The diode D1 in power supply 1 and power supply 2 is an anti-reverse diode.
Referring to the example shown in fig. 15, in the solution of the present invention, the operation principle of the air conditioner indoor and outdoor set zero-fire line communication self-regulating circuit can be referred to the following exemplary description.
And on the outdoor unit side, if the E is a zero line, under the control of the MCU, closing a relay switch K-5 and connecting the power supply 1 into a communication loop. If the F is the zero line, under the control of the MCU, the relay switch K-6 is closed, and the power supply 2 is connected into the communication loop.
And on the indoor machine side, if A is a zero line, under the control of the MCU, closing a relay switch K-3 and connecting the line A into a communication loop. If B is the zero line, under the control of the MCU, the relay switch K-4 is closed, and the line B is accessed into the communication loop.
Fig. 17 is a schematic general structural diagram of an embodiment of the zero line sequence conditioning device of the air conditioner of the present invention. The general structure of the zero-fire line sequence conditioning device of the air conditioner provided by the invention can be seen from the example shown in fig. 17.
By adopting the technical scheme of the invention, the zero line detection circuit and the zero line selection switch are arranged on the indoor unit side, the zero line detection circuit is used for detecting the zero line and the live line of the indoor unit after the indoor unit is powered on, and the communication module of the zero line and the zero line is connected through the zero line selection switch. An indoor unit and an outdoor unit are provided with an indoor unit and outdoor unit inner and outer unit line sequence detection module, an outdoor unit side is provided with a current flow direction detection circuit and a zero-live line power switching circuit, the current flow direction detection current is controlled to start under the condition that a zero line of the indoor unit is connected with the zero-live line communication module, the zero-live line sequence of the indoor unit and the zero-live line sequence of the outdoor unit are detected, and the zero-live line communication module of the outdoor unit side is connected through the zero-live line power switching circuit according to the detection result, so that the zero-live line of the indoor unit is detected and adjusted after the indoor unit is powered on, and the zero-live line sequence of the indoor unit and the zero-live line of the air conditioner are detected and adjusted after the outdoor unit is powered on, so that the zero-live line installation between the indoor unit of the air conditioner and the commercial power and between the indoor unit of the air conditioner and the commercial power is not required to be distinguished, the zero-live line, zero-live line assembly difficulty between the indoor unit of the air conditioner and the commercial power is greatly reduced, and the zero-live line between the indoor unit of the air conditioner and the commercial power, The difficulty of reassembling after zero-fire lines between the air conditioner indoor unit and the air conditioner outdoor unit are assembled wrongly is large, and the risk of damaging the air conditioner is also caused.
According to the embodiment of the invention, a control method of the zero line sequence conditioning device of the air conditioner corresponding to the device is also provided, as shown in the flow chart of fig. 16, which is an embodiment of the method of the invention. The control method of the zero-fire line sequence conditioning device of the air conditioner can comprise the following steps: step S110 to step S130.
In step S110, an inner machine zero-live wire reverse connection identification and alignment unit is controlled to identify a zero line in the inner machine first power line and the inner machine second power line, and a connection line between the zero line in the inner machine first power line and the inner machine second power line and the inner machine communication module is connected to connect the zero line in the inner machine first power line and the inner machine second power line into the communication current loop.
In step S120, an indoor and outdoor unit line sequence identification auxiliary unit is controlled, and when the zero line of the indoor unit first power line and the zero line of the indoor unit second power line are connected to the communication current loop, a power supply line in which the zero line of the indoor unit first power line and the zero line of the indoor unit second power line are located is connected to a connection line between corresponding outdoor unit power lines of the outdoor unit first power line and the outdoor unit second power line, so as to connect the power supply line for supplying power to the outdoor unit by the indoor unit. The first output line and the second output line of the auxiliary unit for identifying the line sequence of the internal and external units can be correspondingly connected with the first power line and the second power line of the external unit. Therefore, a power supply line where the zero line in the first power line of the internal machine and the second power line of the internal machine are located is connected with a corresponding external machine power line in the corresponding connection of the first power line of the external machine and the second power line of the external machine through a corresponding output line in the first output line and the second output line of the internal and external machine line sequence identification auxiliary unit.
At step S130, an outer unit line sequence identifying and adjusting unit is controlled, and when a power supply line for the inner unit to supply power to the outer unit is connected, current flow directions of a first power line of the outer unit and a second power line of the outer unit are identified, and a connecting line between a corresponding zero-live line communication power supply of the first zero-live line communication power supply and the second zero-live line communication power supply and the outer unit communication module is selected to be connected, so as to connect the corresponding zero-live line communication power supply of the first zero-live line communication power supply and the second zero-live line communication power supply to the communication current loop.
In some embodiments, the invention provides a control method for a zero-live line sequence self-conditioning circuit of an internal and external machine for an air conditioner, comprising:
step 1, firstly, a zero line of the indoor unit is identified through a zero line detection circuit, and then the zero line is correctly connected into a communication module of the indoor unit part, which can be specifically seen in the examples shown in fig. 6 and 15.
The principle and the working process of the zero line identification of the indoor unit are shown in the examples shown in fig. 4, 5 and 6.
Step 2, controlling a switch (such as a relay switch) to connect a diode in series with a live wire, and using the unidirectional conductivity of the diode to enable the current flow direction detection circuit in the outdoor unit to identify a line sequence between the indoor unit and the outdoor unit, so as to detect a zero line of the outdoor unit, which may be specifically referred to as an example shown in fig. 12 and 13.
The principle and the working process of identifying the zero-live line sequence between the internal machine and the external machine are shown in the examples shown in fig. 10, 11, 12, 13 and 14 in detail.
Step 3, after the zero line of the outdoor unit is determined, controlling the communication power selection switch in step 3 to enable the communication power to be correctly connected to the communication circuit, which may be specifically referred to as the example shown in fig. 14 and 15. At this moment, the communication circuit loop is established, the communication can be started normally, and the whole alignment process is finished.
The principle and the working process of the air conditioner indoor and outdoor unit zero and live wire communication self-conditioning circuit are shown in the examples of fig. 1, fig. 2, fig. 14 and fig. 15 in detail.
Taking the outdoor unit as an example, because a large electrolytic capacitor (filter capacitor) exists, the electrolytic capacitor needs to be charged after the outdoor unit is powered on, and a certain time is needed from power-on to normal and stable operation of the switching power supply, so that a normal voltage is provided for an air conditioner outdoor unit system. The time from the power-on of the outdoor unit to the stable VCC is t 0 . After the wiring is finished, the indoor unit is started up, the power is turned on, the switching power supply of the indoor unit of the air conditioner starts to work, and normal and stable voltage is supplied to the MCU and the peripheral control circuit thereof. At the moment, the MCU controls the relay switch K-N to be closed, and zero line identification is carried out on the line A.
Referring to the example shown in fig. 11, a diode is connected in series to the line in which the live line L is located. And detecting which is the zero line, and controlling the relay switch of the circuit where the zero line is located to be closed, namely, a diode where the short-circuit zero line is located. If the detection result of the zero line detection circuit is that the line A is the zero line, the relay switch K-1 is controlled to be closed, and the diode D of the line in which the live wire L (namely the line B) is connected in series into the circuit. And under the control of the MCU, closing a relay switch K-3 and connecting the line A into a communication loop.
If the detection result of the zero line detection circuit is that the line A is the live line, the relay switch K-2 is controlled to be closed, and the diode D of the line in which the live line L (namely the line A) is connected in series into the circuit. And under the control of the MCU, a relay switch K-4 is closed, and the line B is connected into a communication loop.
After the relay switch is closed, the unidirectional conductivity of the diode enables the alternating current to be converted into direct current to supply power to the external machine, and 2 x t of time passes 0 And then the MCU in the outdoor unit starts to detect output signals at two ends of the current module, and further the zero-live line sequence of the EF line of the outdoor unit is judged. The method of determining the zero-fire line sequence between the internal and external units will be described in detail with reference to fig. 11, 12, and 13, and will not be described here.
After the zero line identification process is finished, the MCU controls the relay switch K-N to be disconnected, and the relay switch K-N is disconnected with a zero (fire) line. Wherein, a relay switch K-N in the zero line detection. And after the switch is disconnected, the detected line and the shell can be completely disconnected. The detected point may be a live wire, an electrical connection exists between the live wire and the casing, and the components RS and C, D have a fault and a possible short circuit, so that the casing is electrified. So to ensure as safe as possible, the switch K-N is provided. And on the external machine side, if the E is a zero line, under the control of the MCU, closing a relay switch K-5 and connecting the power supply 1 into a communication loop. If the F is the zero line, under the control of the MCU, the relay switch K-6 is closed, and the power supply 2 is connected into the communication loop.
In summary, the workflow of the scheme of the invention is as follows: the method comprises the steps of powering on an inner machine when the inner machine is started up → normal work starts after the output voltage of a switching power supply is stabilized → zero line detection is carried out under the control of an MCU → a zero line and live line communication selection switch (K-3 or K-4) of the inner machine is controlled, meanwhile, the control switch (K-1 or K-2) starts to carry out line sequence detection on the inner machine and the outer machine → powering on the outer machine → normal work starts after the output voltage of the switching power supply is stabilized → the MCU works to detect the current direction so as to judge the line sequence between the inner machine and the outer machine → the control switch (K-5 or K-6) selects a zero line and live line communication power supply → the establishment of a zero line and live line communication loop → communication attempt → the completion of the adjustment of the line sequence of the inner machine and the outer machine. Above, the zero-fire line sequence alignment work between the air conditioner indoor unit and the air conditioner outdoor unit is finished, and only one zero-fire line alignment is carried out after power is supplied, so that the installation of the zero-fire line between the air conditioner indoor unit and the commercial power and the air conditioner indoor unit does not need to be distinguished, the installation difficulty is reduced, the problem caused by reverse connection of the zero-fire line is eliminated, and the installation efficiency is improved. And, use unique circuit structure discernment zero live wire, thereby can effectively reduce electrical risk and electric leakage problem and promote the security performance, can also reduce extra device use cost low.
Since the processes and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the apparatus, reference may be made to the related descriptions in the embodiments without being detailed in the description of the present embodiment, which is not described herein again.
By adopting the technical scheme of the embodiment, the zero line detection circuit and the zero line selection switch are arranged on the side of the indoor unit, the zero line detection circuit is used for detecting the zero line and the live line of the indoor unit after the indoor unit is powered on, and the zero line and the live line communication module is connected through the zero line selection switch; the indoor unit and the outdoor unit are provided with an indoor unit and outdoor unit line sequence detection module, the outdoor unit side is provided with a current flow direction detection circuit and a zero-live line power supply switching circuit, the current flow direction detection current is controlled to start under the condition that the zero line of the indoor unit is connected with the zero-live line communication module, the indoor unit and the outdoor unit are detected to detect the zero-live line sequence of the indoor unit and the zero-live line sequence of the outdoor unit, the zero-live line communication module of the outdoor unit side is connected through the zero-live line power supply switching circuit according to the detection result, the problem caused by reverse connection of the zero-live line is solved, and the installation efficiency is improved.
In conclusion, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. The zero-fire line sequence conditioning device of the air conditioner is characterized in that the air conditioner is provided with an inner machine and an outer machine; an inner machine communication module is arranged on the inner machine side; an external machine communication module is arranged on the external machine side; the power cord of the inner machine comprises: an inner machine first power line and an inner machine second power line; the power cord of the outdoor unit includes: the first power line of the outdoor unit and the second power line of the outdoor unit; the outdoor unit is provided with a first zero-live wire communication power supply and a second zero-live wire communication power supply; the outer machine communication module and the inner machine communication module can be connected through a power line and a communication line to form a communication current loop;
the zero-fire line sequence conditioning device of the air conditioner comprises: the system comprises an internal machine zero-live wire reverse connection identification and alignment unit, an internal and external machine line sequence identification auxiliary unit and an external machine line sequence identification and alignment unit;
wherein, the first and the second end of the pipe are connected with each other,
the indoor unit zero-live wire reverse connection identification and alignment unit is configured to identify a zero line in the indoor unit first power line and the indoor unit second power line and to connect a connecting line between the zero line in the indoor unit first power line and the indoor unit second power line and the indoor unit communication module so as to connect the zero line in the indoor unit first power line and the indoor unit second power line into the communication current loop;
the inner machine and outer machine line sequence identification auxiliary unit is configured to connect a power supply line where a zero line in the inner machine first power line and the inner machine second power line is located with a connecting line between the outer machine first power line and a corresponding outer machine power line in the outer machine second power line under the condition that the zero line in the inner machine first power line and the inner machine second power line are connected into the communication current loop, so as to connect the power supply line for supplying power to the outer machine by the inner machine;
the outer machine line sequence identification and adjustment unit is configured to identify current flow directions of a first power line and a second power line of the outer machine under the condition that a power supply line for supplying power to the outer machine by the inner machine is connected, and select a connecting line between a corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply and the outer machine communication module to be connected, so that the corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply is connected into the communication current loop.
2. The zero line and live line sequence conditioning device of the air conditioner as claimed in claim 1, wherein the internal machine zero line and live line reverse connection identification and adjustment unit comprises: the zero line detection module and the zero line selection module; wherein the content of the first and second substances,
the indoor unit zero and live wire reverse connection identification and alignment unit identifies the first power line of the indoor unit and the zero line in the second power line of the indoor unit, and enables the first power line of the indoor unit and the zero line in the second power line of the indoor unit to be connected with the connecting line between the communication modules of the indoor unit, and comprises:
the zero line detection module is configured to identify a zero line in the inner machine first power line and the inner machine second power line;
the zero line selection module is configured to connect a connecting line between the zero line in the first power line and the second power line of the inner machine and the inner machine communication module based on the identified zero line in the first power line and the second power line of the inner machine.
3. The zero line sequence conditioning device of an air conditioner according to claim 2, wherein the zero line detection module comprises: the device comprises a first switch module, a current limiting module, a bidirectional diode module, a capacitor module and a signal acquisition and processing module; wherein the content of the first and second substances,
taking any one of the first power line of the inner machine and the second power line of the inner machine as an inner machine detection line; after the detection of the inner machine passes through the first switch module and the current limiting module, the inner machine is connected to the first end of the bidirectional diode module and the first end of the capacitor module on one hand, and is connected to the first end of the signal acquisition processing module on the other hand; the second end of the bidirectional diode module and the second end of the capacitor module are connected to the second end of the signal acquisition and processing module; the second end of the bidirectional diode module is also connected with the shell; the third end of the signal acquisition processing module is used as an output end and is used for outputting a zero line detection result to the controller of the air conditioner; the fourth end of the signal acquisition processing module is connected with a direct current power supply;
in the bidirectional diode module, the anode of a first diode is connected with the cathode of a second diode, and the cathode of the first diode is connected with the anode of the second diode; the signal acquisition processing module adopts a differential amplification circuit;
and under the condition that the first switch module is closed, the signal acquisition processing module outputs a zero line detection result that the inner machine detection line is a live line or a zero line.
4. The zero line sequence conditioning device of an air conditioner according to claim 2, wherein the zero line selection module includes: the first zero line selection branch and the second zero line selection branch are connected with the first zero line selection branch; the first power line of the inner machine is connected to the communication module of the inner machine after passing through the first zero line selection branch, and the second power line of the inner machine is connected to the communication module of the inner machine after passing through the second zero line selection branch; wherein the content of the first and second substances,
the first zero line selection branch and the second zero line selection branch have the same structure; the first zero line selection branch comprises: the protection circuit comprises a first diode module, a first protection module and a second switch module; wherein, the first and the second end of the pipe are connected with each other,
the inner machine first power line is connected to the cathode of the diode module; the anode of the first diode module is connected to the internal machine communication module after passing through the first protection module and the second switch module;
and under the condition that the second switch module is closed, the first power line of the inner machine is connected to the inner machine communication module.
5. The zero line sequence conditioning device of an air conditioner according to claim 1, wherein the outer and inner unit line sequence recognition auxiliary unit comprises: a first auxiliary branch and a second auxiliary branch; the first power line of the inner machine is connected to a first output line through the first auxiliary branch, and the second power line of the inner machine is connected to a second output line through the second auxiliary branch; the first output line can be connected with one of the first power line of the outdoor unit and the second power line of the outdoor unit; the second output line can be connected with the other one of the first power line and the second power line of the outdoor unit; wherein the content of the first and second substances,
the first auxiliary branch and the second auxiliary branch have the same structure; the first auxiliary branch comprises: a second diode module and a third switch module; the second diode module is connected with the third switch module in parallel; the inner machine first power line is connected to the anode of the second diode module; a cathode of the second diode module connected to the first output line;
under the condition that the third switch module is closed, a connecting line between the first inner machine power line and the first output line is connected, and then the first inner machine power line and a connecting line between an outer machine power line connected with the first output line in the first outer machine power line and the second outer machine power line are connected.
6. The zero line sequence conditioning device of an air conditioner according to claim 1, wherein the external unit line sequence recognition and alignment unit comprises: the current flow direction detection module and the zero-live line power supply switching module; wherein the content of the first and second substances,
the outer machine line order discernment and alignment unit discerns the electric current flow direction of outer machine first power cord with outer machine second power cord, selects first zero live wire communication power with correspond in the second zero live wire communication power with the connecting wire switch-on between the outer machine communication module includes:
the current flow direction detection module is configured to identify current flow directions of the first power line and the second power line of the outdoor unit;
the zero-live wire power supply switching module is configured to select a corresponding zero-live wire communication power supply of the first zero-live wire communication power supply and the second zero-live wire communication power supply to be connected with the outer unit communication module based on the identified current flow directions of the first power line and the second power line of the outer unit.
7. The zero line sequence conditioning device of the air conditioner according to claim 6, wherein the current flow direction detecting module comprises: the circuit comprises a first optical coupling module, a second optical coupling module, a third diode module, a fourth diode module, a first resistor module, a second resistor module, a third resistor module, a fourth resistor module, a fifth resistor module, a sixth resistor module, a first electrolytic capacitor module and a second electrolytic capacitor module; wherein the content of the first and second substances,
a first output terminal of the current flow direction detection structure is a collector electrode on the transistor side of the first optocoupler module; a second output terminal of the current flow direction detection structure is a collector electrode on the transistor side of the third optocoupler module;
a direct current power supply is connected to a collector electrode on the transistor side of the first optical coupling module after passing through the first resistor module, a diode side of the first optical coupling module is connected with the first electrolytic capacitor module and the fourth resistor module in parallel, an anode on the diode side of the first optical coupling module is connected with an anode of the first electrolytic capacitor module and a cathode of the third diode module, and a cathode of the first electrolytic capacitor module is connected with a second power line of the outdoor unit after passing through the sixth resistor module;
the direct current power supply is connected to the collector of the transistor side of the second optical coupling module after passing through the third resistor module, the diode side of the second optical coupling module is connected in parallel with the second electrolytic capacitor module and the fifth resistor module, the cathode of the diode side of the second optical coupling module is connected with the cathode of the second electrolytic capacitor module and the anode of the fourth diode module, and the anode of the second electrolytic capacitor module is connected with the second power line of the external machine after passing through the sixth resistor module.
8. The zero line and live line sequence conditioning device of the air conditioner according to claim 6, wherein the zero line and live line power switching module comprises: a first identification branch and a second identification branch; the first power line of the outdoor unit is connected to the communication module of the outdoor unit after passing through the first zero-live line communication power supply and the first identification branch; the second power line of the outdoor unit is connected to the communication module of the outdoor unit after passing through the second zero-live line communication power supply and the second identification branch; wherein the content of the first and second substances,
the first identification branch and the second identification branch have the same structure; the first identification branch comprises: the second protection module, the fifth diode module and the fourth switch module; the first power line of the outdoor unit is connected with the anode of the fifth diode module after passing through the first zero-live line communication power supply and the second protection module; and the cathode of the fifth diode module is connected to the outer machine communication module after passing through the fourth switch module.
9. The zero line sequence conditioning device of the air conditioner according to claim 6, wherein the first zero line and live line communication power supply and the second zero line and live line communication power supply have the same structure; the first zero live line communication power supply comprises: the voltage stabilizing module, the third electrolytic capacitor module and the sixth diode module; the first power line of the outdoor unit is respectively connected to the anode of the voltage stabilizing module and the cathode of the third electrolytic capacitor module; the cathode of the voltage stabilizing module is connected to the anode of the sixth diode module; and the cathode of the sixth diode module is connected with the anode of the third electrolytic capacitor module and is connected to the zero-live wire power supply switching module.
10. A control method of the zero line sequence conditioning device of the air conditioner according to any one of claims 1 to 9, comprising:
controlling an inner machine zero-live wire reverse connection identification and alignment unit, identifying a zero line in a first inner machine power line and a second inner machine power line, and connecting a connecting line between the zero line in the first inner machine power line and the second inner machine power line and the inner machine communication module so as to connect the zero line in the first inner machine power line and the second inner machine power line into the communication current loop;
controlling an internal and external machine line sequence identification auxiliary unit, and under the condition that a zero line in an internal machine first power line and an internal machine second power line is connected into a communication current loop, connecting a power supply line where the zero line in the internal machine first power line and the internal machine second power line is positioned with a connecting line between corresponding external machine power lines in the external machine first power line and the external machine second power line so as to connect the power supply line for supplying power to the external machine by the internal machine;
and controlling an outer machine line sequence identification and alignment unit, identifying the current flow direction of a first power line of the outer machine and a second power line of the outer machine under the condition of connecting a power supply line for supplying power to the outer machine by the inner machine, and selecting a connecting line between a corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply and the outer machine communication module to be connected so as to connect the corresponding zero-live line communication power supply in the first zero-live line communication power supply and the second zero-live line communication power supply into the communication current loop.
CN202210661760.1A 2022-06-13 2022-06-13 Zero-live wire line sequence conditioning device of air conditioner and control method thereof Active CN114992806B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2211406C2 (en) * 2001-06-20 2003-08-27 Белгородская государственная технологическая академия строительных материалов Microcontroller unit for automatic test and control over processes of lighting up of burner and burning
WO2021237977A1 (en) * 2020-05-26 2021-12-02 捍防（苏州）实业有限公司 Apparatus and method for monitoring resistance between null line and ground line
WO2022037618A1 (en) * 2020-08-20 2022-02-24 上海南麟电子股份有限公司 Alternating-current test circuit
CN114389259A (en) * 2022-01-13 2022-04-22 珠海格力电器股份有限公司 Zero-live wire self-adjusting circuit and method and air conditioner
CN114400659A (en) * 2022-01-13 2022-04-26 珠海格力电器股份有限公司 Zero-live wire self-adjusting circuit and method and air conditioner
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2211406C2 (en) * 2001-06-20 2003-08-27 Белгородская государственная технологическая академия строительных материалов Microcontroller unit for automatic test and control over processes of lighting up of burner and burning
WO2021237977A1 (en) * 2020-05-26 2021-12-02 捍防（苏州）实业有限公司 Apparatus and method for monitoring resistance between null line and ground line
WO2022037618A1 (en) * 2020-08-20 2022-02-24 上海南麟电子股份有限公司 Alternating-current test circuit
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
CN114389259A (en) * 2022-01-13 2022-04-22 珠海格力电器股份有限公司 Zero-live wire self-adjusting circuit and method and air conditioner
CN114400659A (en) * 2022-01-13 2022-04-26 珠海格力电器股份有限公司 Zero-live wire self-adjusting circuit and method 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

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