WO2019024349A1 - 空调器电流环通信电路及空调器 - Google Patents

空调器电流环通信电路及空调器 Download PDF

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Publication number
WO2019024349A1
WO2019024349A1 PCT/CN2017/113502 CN2017113502W WO2019024349A1 WO 2019024349 A1 WO2019024349 A1 WO 2019024349A1 CN 2017113502 W CN2017113502 W CN 2017113502W WO 2019024349 A1 WO2019024349 A1 WO 2019024349A1
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WIPO (PCT)
Prior art keywords
current loop
power supply
air conditioner
loop communication
module
Prior art date
Application number
PCT/CN2017/113502
Other languages
English (en)
French (fr)
Inventor
苏立志
霍兆镜
Original Assignee
广东美的制冷设备有限公司
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 广东美的制冷设备有限公司, 美的集团股份有限公司 filed Critical 广东美的制冷设备有限公司
Priority to PL17920529T priority Critical patent/PL3644519T3/pl
Priority to ES17920529T priority patent/ES2871979T3/es
Priority to JP2020503021A priority patent/JP2020527327A/ja
Priority to EP17920529.9A priority patent/EP3644519B1/en
Publication of WO2019024349A1 publication Critical patent/WO2019024349A1/zh
Priority to US16/750,445 priority patent/US11378294B2/en
Priority to HRP20210629TT priority patent/HRP20210629T1/hr

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Classifications

    • 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
    • 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
    • F24F11/46—Improving electric energy efficiency or saving
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428—Safety, monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25191—Current loop
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25257—Microcontroller
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2638—Airconditioning
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters

Definitions

  • the invention relates to the field of indoor and outdoor communication circuits of air conditioners, in particular to an air conditioner current loop communication circuit and an air conditioner.
  • the communication between the indoor and outdoor units of the household air conditioner is generally realized by a current loop communication circuit, and the current loop communication is realized by three lines, that is, the AC power line L, the zero line N, and a communication S line.
  • the indoor unit and the outdoor unit form a current loop communication circuit through L, N, and S to realize communication between the indoor unit and the outdoor unit of the air conditioner.
  • the communication loop of the current loop communication circuit needs to provide DC power such as 24V to work normally.
  • This DC power supply circuit is generally realized by AC power supply through voltage divider resistor divider, diode rectification, and then simple voltage regulator through the Zener diode.
  • the voltage shared by the resistor is high. Therefore, there is a large power consumption caused by the voltage divider resistor, which causes severe heat generation.
  • the volume of the voltage divider resistor is not favorable to the PCB layout of the current loop communication circuit.
  • the main object of the present invention is to provide an air conditioner current loop communication circuit and an air conditioner, which aims to solve the problem of PCB wiring caused by excessive heat generation and excessive volume due to large power consumption of the voltage dividing resistor in the current air conditioner communication circuit.
  • the present invention provides an air conditioner current loop communication circuit, which includes an indoor unit current loop communication module, an outdoor unit current loop communication module, an indoor MCU, an outdoor MCU, and a switching power supply module;
  • the indoor unit current loop communication module is connected to the outdoor unit current loop communication module through a communication connection S line and an AC power connection line to form a current loop communication loop; the indoor MCU and the outdoor MCU pass the current loop communication loop
  • the circuit implements communication; the switching power supply module is connected in series to the communication connection S line or the AC power connection line to output DC power to the current loop communication loop.
  • the AC power connection line is an N-line of an AC power source
  • the switching power supply module is located in an indoor unit of the air conditioner, and the output terminal of the switching power supply module is positively connected to the N-line of the AC power source, and the negative terminal of the output end of the switching power supply module is connected to the indoor ring current loop communication module; or
  • the switching power supply module is located in an outdoor unit of the air conditioner, and the output end of the switching power supply module is positively connected to the N-line of the AC power supply, and the negative end of the output end of the switching power supply module is connected to the outdoor circuit current loop communication module.
  • the AC power connection line is an AC power line L;
  • the switching power supply module is located in an indoor unit of the air conditioner, and the output end of the switching power supply module is positively connected to the AC power supply L line, and the negative end of the output end of the switching power supply module is connected to the indoor unit current loop communication module; or
  • the switching power supply module is located in an outdoor unit of the air conditioner, and the output terminal of the switching power supply module is positively connected to the AC power supply L line, and the negative end of the output end of the switching power supply module is connected to the outdoor unit current loop communication module.
  • the switching power supply module includes a switching transformer, and the switching transformer includes a first output winding
  • the first output winding outputs a first direct current to the current loop communication loop to provide a direct current power source.
  • a one-way protection module is also included;
  • the unidirectional protection module is connected in series in the current loop communication loop to provide a unidirectional DC path for the current loop communication loop.
  • the unidirectional protection module includes a first unidirectional protection module and a second unidirectional protection module, and the first unidirectional protection module is connected in series on an indoor unit side of the current loop communication loop.
  • the second unidirectional protection module is connected in series on the outdoor unit side of the current loop communication loop.
  • the first unidirectional protection module includes a first diode
  • the second unidirectional module includes a second diode
  • the first diode and the second diode are respectively connected in series on the indoor unit side of the current loop communication loop and the outdoor unit side of the current loop communication loop.
  • an overcurrent protection module is also included;
  • the overcurrent protection module is connected in series in the current loop communication loop to provide overcurrent protection for the current loop communication loop.
  • the overcurrent protection module is a PTC resistor
  • the PTC resistor is connected in series in the current loop communication loop.
  • the present invention also provides an air conditioner comprising the air conditioner current loop communication circuit.
  • the air conditioner current loop communication circuit sets the switching power supply module and connects it in series on the communication connection S line or the AC power connection line to output the direct current to the current loop communication loop, and the invention uses the switching power supply module output
  • the DC power replaces the existing resistor-dividing type DC power supply circuit, and is compatible with the existing current loop communication circuit in the connection line between the indoor and outdoor of the air conditioner, and solves the work of the voltage divider resistance in the existing resistor divider circuit.
  • the problem of large heat consumption is serious, and the existing large size of the voltage dividing resistor is also unfavorable for the PCB board wiring problem.
  • FIG. 1 is a schematic diagram of a current current loop communication connection line between an indoor unit and an outdoor unit of an air conditioner
  • FIG. 2 is a circuit structural diagram of a first embodiment of an air conditioner current loop communication circuit according to the present invention
  • FIG. 3 is a specific circuit structure diagram of the switching power supply module of FIG. 2;
  • FIG. 4 is another circuit configuration diagram of a first embodiment of an air conditioner current loop communication circuit according to the present invention.
  • Figure 5 is a circuit diagram showing another circuit of the first embodiment of the current loop communication circuit of the air conditioner of the present invention.
  • Figure 6 is a block diagram showing another circuit of the first embodiment of the current loop communication circuit of the air conditioner of the present invention.
  • FIG. 2 is a structural diagram of a current loop communication circuit module of an air conditioner according to a first embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, which are as follows:
  • the air conditioner current loop communication circuit provided by the embodiment of the invention includes an outdoor MCU 10, an outdoor unit current loop communication module 20, an indoor unit current loop communication module 30, an indoor MCU 40, and a switching power supply module 50;
  • the indoor unit current loop communication module 30 is connected to the outdoor unit current loop communication module 20 through the communication connection S line and the AC power connection line to form a current loop communication loop; the indoor MCU 40 and the outdoor MCU 10 communicate through the current loop communication loop; The module 50 is connected in series to the communication connection S line or the AC power connection line to output a DC power supply to the current loop communication loop.
  • the air conditioner current loop communication circuit of the present invention includes an indoor unit portion and an outdoor unit portion.
  • the indoor unit includes an indoor unit current loop communication module 30, an indoor MCU 40, and a switching power supply module 50 located at the indoor unit side.
  • the outdoor unit includes: an outdoor unit current loop communication module 70 and an outdoor MCU 80.
  • the indoor unit and the outdoor unit are based on communication between the indoor MCU 40 and the outdoor MCU 10 to realize normal communication between the indoor unit and the outdoor unit, and to realize control and status information transmission and reception between the two.
  • the indoor unit current loop communication module 10 is mainly composed of an optocoupler IC3, an optocoupler IC4 and a triode Q2, wherein the optocoupler IC3 is responsible for communication reception of the indoor part of the current loop communication circuit, and one end of the phototransistor is connected to the signal receiving pin of the indoor MCU40.
  • RXD one end of the LED is the input end of the indoor unit current loop communication module 10, the communication of the indoor part is input from the input end, and then output from the phototransistor end to the MCU40, so that the indoor MCU reads the received data of the communication; the optocoupler IC4 is responsible for the communication and transmission of the indoor part of the current loop communication circuit.
  • One end of the light-emitting diode passes through the collector of the transistor Q2, and the base of the transistor Q2 is connected to the MCU. 40 signal transmission pin TXD,
  • the communication signal sent by the MCU 40 is driven by the transistor Q2 and sent to one end of the LED of the optocoupler IC 4.
  • One end of the phototransistor is the output end of the indoor unit current loop communication module 10, so that the communication signal sent by the MCU 40 is output from the output end.
  • the outdoor unit current loop communication module 20 is mainly composed of an optocoupler IC1, an optocoupler IC2 and a triode Q3.
  • the optocoupler IC1 is responsible for communication reception of the outdoor part of the current loop communication circuit, and one end of the phototransistor is connected to the signal receiving pin of the outdoor MCU10. RXD, one end of the LED is the input end of the outdoor unit current loop communication module 10, the outdoor part of the communication is input from the input end, and then output from the phototransistor end to the MCU 10, so that the outdoor MCU reads the communication receiving data; the optocoupler IC2 is responsible for the communication and transmission of the outdoor part of the current loop communication circuit.
  • One end of the light emitting diode passes through the collector of the transistor Q1, and the base of the transistor Q1 is connected to the signal transmitting pin TXD of the MCU10.
  • the communication signal sent by the MCU 10 is driven by the transistor Q1 and sent to one end of the light-emitting diode of the optocoupler IC2, and receives the communication signal sent by the MCU10.
  • One end of the phototransistor is the output end of the outdoor unit current loop communication module 10, thereby realizing the MCU. 10
  • the transmitted communication signal is output from the output.
  • the switching power supply module 50 located on the indoor unit side is connected in series with the N-line of the AC power supply, and the output first DC power supplies the DC power to the current loop communication loop. Specifically, the switching power supply module 50 outputs multiple DC power, wherein the switching power supply module 50 An independent winding of the switching transformer, that is, the first winding outputs a first direct current to the current loop communication loop to provide a DC power supply, as shown in the figure, the switching power supply module 50 outputs an independent +24V DC power supply for the current loop communication loop to provide DC power, and the output thereof
  • the positive pole of the terminal is connected to the N line of the AC power supply, and the negative pole of the output terminal is connected to the current loop communication module 30 of the indoor unit. As shown in FIG.
  • the current loop communication is realized by connecting three wires, that is, L, N, and S, between the indoor unit and the outdoor unit of the air conditioner.
  • the transmission of the alternating current power source the direct current 24V positive pole of the switching power supply 50 is connected with the alternating current N line, that is, the positive pole of the direct current power supply in the communication loop is shared with the N line, thereby realizing the current with the existing indoor unit and the outdoor unit.
  • the three communication cables of the ring are common.
  • the indoor unit and the outdoor unit connection line L in the figure are not drawn, and actually pass the L and N lines.
  • the transmission of alternating current between indoor unit and outdoor unit is now available.
  • the 24V positive pole is input from the indoor unit side N line to the current loop communication loop, and its direct current passes through the outdoor unit side N line to the outdoor unit side optocoupler IC1, the outdoor unit side optocoupler IC2, the indoor unit side optocoupler IC3, indoor
  • the machine side optocoupler IC4 returns to the DC 24V negative pole, and the 24V anode connection indoor unit current loop communication module 30 is specifically connected to the output end of the communication module 30.
  • the 24V negative pole is also the common ground line output by the current loop communication module 30, specifically the light.
  • the transistor emitter of IC4 is coupled.
  • the switching power supply module 50 outputs other DC power to other windings of the switching transformer.
  • the second winding of the switching transformer pays the second direct current +5V, and the DC negative pole is shared with the negative pole of 24V to provide a working place for the indoor MCU.
  • the switching power supply module 50 can also output other direct current to provide the DC power of the other outdoor working circuit, that is, the switching power supply module 50 provides direct current to the entire outdoor unit circuit, and the existing outdoor unit circuit switching power supply, the embodiment of the present invention
  • the switching transformer of the switching power supply module 50 adds a winding output to a set of separate direct currents to provide a DC power supply for the current loop communication loop, and the DC power supply of the existing current loop communication loop is divided by the alternating current power supply through the voltage dividing resistor,
  • the diode is rectified and then stabilized by a Zener diode. This eliminates the need for a large voltage-dividing resistor due to excessive power consumption.
  • the PCB layout is also very simple. There are no large components.
  • FIG. 3 is a specific circuit diagram of the switching power supply module 50 located on the indoor unit side, and the switching power supply is mainly composed of a switching power supply control chip IC5, a switching transformer T1, a voltage feedback optocoupler IC 14, and a voltage regulator chip IC7.
  • the switching power supply module 50 in the above FIG. 2 and FIG. 3 is connected in series to the N line of the AC power supply, and may also be connected in series on the communication connection S line, because the indoor unit current loop communication module 10 and the outdoor unit current loop communication module 70 are connected by communication.
  • the S line and the AC power connection line L or N are connected to form a current loop communication loop, and the switching power supply module 50 functions to supply DC power to the current loop communication loop, so whether it is connected in series on the communication connection S line or in series in the AC power connection Line L or N can achieve normal operation of the current loop communication loop.
  • the difference between the air conditioner current loop communication circuit shown in FIG. 4 and the air conditioner current loop communication circuit of FIG. 2 is that the switching power supply module 50 is connected in series with the L line of the AC power source, and the output terminal of the switching power supply module 50 is positive. +24V is connected to the L line of the AC power supply, and the output terminal of the switching power supply module 50 is connected to the indoor unit current loop communication module 30.
  • the AC power supply N line is not shown in the figure, and the indoor unit and the outdoor unit are realized through the L and N lines. AC transmission.
  • the switching power supply module 50 is located at the outdoor unit side, and the switching power supply module 50 outputs 24 V DC through the indoor side.
  • the AC N line is input into the current loop communication loop, and the DC power is returned to the indoor unit side optocoupler IC3, the indoor unit side optocoupler IC4, the outdoor unit side optocoupler IC1, and the outdoor unit side optocoupler IC2 via the outdoor unit side N line.
  • the 24V negative pole of the direct current and the negative pole of 24V are connected to the outdoor loop current loop communication module 20, specifically the triode emitter of the optocoupler IC2.
  • the air conditioner current loop communication circuit shown in FIG. 6 is different from the air conditioner current loop communication circuit of FIG. 5 in that the switching power supply module 50 is connected in series with the L line of the AC power source, and the output terminal of the switching power supply module 50 is positive. +24V is connected to the L line of the AC power supply, and the negative terminal of the output terminal of the switching power supply module 50 is connected to the outdoor unit current loop communication module 20.
  • the AC power supply N line is not shown in the figure, and the indoor unit and the outdoor unit are realized through the L and N lines. AC transmission.
  • the air conditioner current loop communication circuit provided by the embodiment of the present invention sets the switching power supply module 50 and connects it in series on the communication connection S line or the AC power connection line to output the direct current to the current loop communication loop, and the switching power supply of the invention
  • the direct current outputted by the module 50 replaces the existing resistance-dividing type DC power supply circuit, and is compatible with the existing current loop communication circuit connecting lines between the indoor and outdoor of the air conditioner, and solves the problem in the existing resistor divider circuit.
  • the problem that the power consumption of the voltage resistor is large and the heat is severe is also solved, and the large volume of the existing voltage dividing resistor is also unfavorable for the PCB board wiring problem.
  • the unidirectional protection module 60 and the unidirectional protection module 60 are further included.
  • the series is connected in the current loop communication loop to provide a unidirectional DC path for the current loop communication loop.
  • the specific unidirectional protection module 60 includes a first diode D1, which is connected in series in a current loop communication loop, and the current in the loop is input from the positive input of the first diode D1 from the first two The negative pole output of the pole tube D1, when two connection lines L, N, S of the indoor unit and the outdoor unit appear reverse connection such as L, S reverse connection, the high voltage power is introduced into the current loop communication loop.
  • the first diode D1 functions to prevent high voltage power from causing damage to other components such as the optocoupler in the loop due to high voltage overcurrent.
  • a unidirectional protection module may be separately disposed on the indoor unit side and the outdoor unit side, as shown in FIG. 2, except that the first unidirectional protection module 60 is disposed on the outdoor unit side, Further, a second unidirectional protection module 70 is disposed on the indoor unit side, and is respectively located at an external interface of the indoor unit and the outdoor unit of the communication line S, and constitutes a negative connection communication line of the first diode D1 of the first unidirectional protection module 60. An output port of S (not shown), an anode of the second diode D4 constituting the second unidirectional protection module 70 is connected to an output port (not shown) of the communication line S.
  • the first diode D1 and the second diode D4 when the high voltage is introduced into the loop when the indoor unit and the outdoor unit connection line are reversed, better protection is achieved, and the indoor and outdoor side loops are prevented. Other components are damaged.
  • an overcurrent protection module 80 and an overcurrent protection module 80 are further included.
  • Series in the current loop communication loop provides overcurrent protection for the current loop communication loop.
  • the specific overcurrent protection module 80 is a PTC resistor R9, and the PTC resistor R9 is connected in series in the current loop communication loop.
  • the PTC resistor R9 is connected in series on the indoor unit side, and of course, can also be connected in series on the outdoor unit side, when the current loop A large current occurs in the communication loop.
  • the present invention also provides an air conditioner, wherein the indoor unit and the outdoor unit communicate with each other through the above-mentioned air conditioner current loop communication circuit.
  • first embodiment means that a specific method, apparatus or feature described in connection with the embodiment or example is included in the present invention. At least one embodiment or example.
  • the schematic representation of the above terms is not necessarily directed to the same embodiment or example.
  • the particular features, methods, devices, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
  • various embodiments or examples described in the specification and features of various embodiments or examples may be combined and combined without departing from the scope of the invention.

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Abstract

本发明提供了一种空调器电流环通信电路和空调器，通过设置开关电源模块并将其串联在通信连接S线或交流电源连接线上，以输出直流电至电流环通信环路，本发明用开关电源输出的直流电替代现有的电阻分压型直流供电电路，并兼容现有的电流环通信电路在空调器室内和室外之间的连接线，解决了现有的电阻分压电路中由于分压电阻功耗大发热严重的问题，同时也解决了现有的分压电阻体积大不利于PCB板布线问题。

Description

空调器电流环通信电路及空调器
技术领域
本发明涉及空调器室内外通信电路领域，尤其涉及空调器电流环通信电路及空调器。
背景技术
目前家用空调器的室内外机的通信一般采用电流环通信电路来实现，电流环通信是通过三根线即交流电源火线L、零线N外加一根通信S线来实现的。如图1所示，室内机部分和室外机部分通过L、N、S构成电流环通信电路实现空调器室内机和室外机的通信。其中电流环通信电路的通讯环路需要提供直流电如24V才能正常工作，此直流供电电路目前一般由交流电源通过分压电阻分压、二极管整流后再通过稳压二极管简单稳压实现，由于分压电阻分担的电压高，因此存在分压电阻工作时功耗大引起发热严重，同时分压电阻体积相对其他元件大也不利于电流环通信电路的PCB布线。
发明内容
本发明的主要目的在于提供一种空调器电流环通信电路及空调器，目的在于解决现有空调器电流环通信电路中由于分压电阻功耗大存在发热严重以及体积过大影响PCB布线问题。
为实现上述目的，本发明提供的一种空调器电流环通信电路，包括室内机电流环通信模块、室外机电流环通信模块、室内MCU、室外MCU、开关电源模块；
所述室内机电流环通信模块通过通信连接S线和交流电源连接线连接所述室外机电流环通信模块，以构成电流环通信环路；所述室内MCU和室外MCU通过所述电流环通信环路实现通信；所述开关电源模块串联于所述通信连接S线或交流电源连接线上，以输出直流电源至所述电流环通信环路上。
在一种可能的设计中，所述交流电源连接线为交流电源N线；
所述开关电源模块位于空调器的室内机，所述开关电源模块输出端正极连接所述交流电源N线，所述开关电源模块输出端负极连接所述室内机电流环通信模块；或，
所述开关电源模块位于空调器的室外机，所述开关电源模块输出端正极连接所述交流电源N线，所述开关电源模块输出端负极连接所述室外机电流环通信模块。
在一种可能的设计中，所述交流电源连接线为交流电源L线；
所述开关电源模块位于空调器的室内机，所述开关电源模块输出端正极连接所述交流电源L线，所述开关电源模块输出端负极连接所述室内机电流环通信模块；或，
所述开关电源模块位于空调器的室外机，所述开关电源模块输出端正极连接所述交流电源L线，所述开关电源模块输出端负极连接所述室外机电流环通信模块。
在一种可能的设计中，所述开关电源模块包括开关变压器，所述开关变压器包括第一输出绕组；
所述第一输出绕组输出第一直流电至所述的电流环通信环路提供直流电源。
在一种可能的设计中，还包括单向保护模块；
所述单向保护模块串联在所述电流环通信环路中，为所述电流环通信环路提供单向直流通路。
在一种可能的设计中，所述单向保护模块包括第一单向保护模块和第二单向保护模块，所述第一单向保护模块串联在所述电流环通信环路的室内机侧，所述第二单向保护模块串联在所述电流环通信环路的室外机侧。
在一种可能的设计中，所述第一单向保护模块包括第一二极管，所述第二单向模块包括第二二极管；
所述第一二极管和所述第二二极管分别串联在所述电流环通信环路室内机侧和所述电流环通信环路室外机侧。
在一种可能的设计中，还包括过流保护模块；
所述过流保护模块串联在所述电流环通信环路中，为所述电流环通信环路提供过流保护。
在一种可能的设计中，所述过流保护模块为PTC电阻；
所述PTC电阻串联在所述电流环通信环路中。
为实现上述目的，本发明还提供一种空调器，所述空调器包括所述的空调器电流环通信电路。
本发明提供的空调器电流环通信电路，通过设置开关电源模块并将其串联在通信连接S线或交流电源连接线上，以输出的直流电至电流环通信环路，本发明用开关电源模块输出的直流电替代现有的电阻分压型直流供电电路，并兼容现有的电流环通信电路在空调器室内和室外之间的连接线，解决了现有的电阻分压电路中由于分压电阻功耗大发热严重的问题，同时也解决了现有的分压电阻体积大不利于PCB板布线问题。
附图说明
图1为现有的空调器室内机和室外机电流环通信连接线示意图；
图2为本发明空调器电流环通信电路第一实施例的电路结构图；
图3为图2中的开关电源模块的具体电路结构图；
图4为本发明空调器电流环通信电路第一实施例的另一电路结构图；
图5为本发明空调器电流环通信电路第一实施例的另一电路结构图；
图6为本发明空调器电流环通信电路第一实施例的另一电路结构图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
参照图2，图2为本发明第一实施例提供的空调器电流环通信电路模块结构图，为了便于说明，仅示出了与本发明实施例相关的部分，详述如下：
本发明实施例提供的空调器电流环通信电路包括室外MCU10、室外机电流环通信模块20、室内机电流环通信模块30、室内MCU40、开关电源模块50；
室内机电流环通信模块30通过通信连接S线和交流电源连接线连接室外机电流环通信模块20，以构成电流环通信环路；室内MCU40和室外MCU10通过电流环通信环路实现通信；开关电源模块50串联于通信连接S线或交流电源连接线上，以输出直流电源至电流环通信环路上。
具体的，如图2所示，本发明空调器电流环通信电路包括室内机部分和室外机部分，
其中室内机部分包括：室内机电流环通信模块30、室内MCU 40、位于室内机侧的开关电源模块50。
室外机部分包括：室外机电流环通信模块70和室外MCU 80。
室内机和室外机基于室内MCU40和室外MCU10之间的通信，以实现室内机和室外机的正常通信，实现二者之间的控制和状态信息的发送和接收。
室内机电流环通信模块10主要由光耦IC3、光耦IC4以及三极管Q2组成，其中光耦IC3负责电流环通信电路室内部分的通信接收，其光敏三极管的一端连接到室内MCU40的信号接收引脚RXD，发光二极管的一端为室内机电流环通信模块10的输入端，室内部分的通信从输入端输入，再从光敏三极管一端输出到MCU40，以此室内MCU读取到通信的接收数据；光耦IC4负责电流环通信电路室内部分的通信发送，其发光二极管的一端通过三极管Q2的集电极，三极管Q2的基极连接到MCU 40的信号发送引脚TXD， MCU40发送的通信信号通过三极管Q2驱动后发送到光耦IC4的发光二极管一端，其光敏三极管的一端为室内机电流环通信模块10的输出端，以此实现MCU40发送的通信信号从输出端输出。
室外机电流环通信模块20主要由光耦IC1、光耦IC2以及三极管Q3组成，其中光耦IC1负责电流环通信电路室外部分的通信接收，其光敏三极管的一端连接到室外MCU10的信号接收引脚RXD，发光二极管的一端为室外机电流环通信模块10的输入端，室外部分的通信从输入端输入，再从光敏三极管一端输出到MCU10，以此室外MCU读取到通信的接收数据；光耦IC2负责电流环通信电路室外部分的通信发送，其发光二极管的一端通过三极管Q1的集电极，三极管Q1的基极连接到MCU10的信号发送引脚TXD， MCU10发送的通信信号通过三极管Q1驱动后发送到光耦IC2的发光二极管一端，接收MCU10发送的通信信号，其光敏三极管的一端为室外机电流环通信模块10的输出端，以此实现MCU 10发送的通信信号从输出端输出。
位于室内机侧的开关电源模块50串联于交流电源N线，输出第一直流电为上述的电流环通信环路提供直流电源，具体的，开关电源模块50输出多路直流电，其中开关电源模块50的开关变压器的一个独立绕组即第一绕组输出第一直流电至上述的电流环通信环路提供直流电源，如图中开关电源模块50输出独立的+24V直流电供电流环通信环路提供直流电，其输出端正极连接交流电源N线，输出端负极连接室内机电流环通信模块30，如图2所示，由于空调器室内机和室外机之间固定连接三根线即L、N、S实现电流环通信以及交流电源的传输，开关电源50输出的直流电24V正极与交流电N线连接，即与N线共用实现通讯环路中直流电源的正极，以此实现了与现有的室内机和室外机的电流环的3根通信连接线的通用，图中的室内机和室外机连接线L没有画出来，实际上通过L和N线实现了室内机和室外机到的交流电的传输。图2中24V正极从室内机侧N线输入到电流环通信环路，其直流电经室外机侧N线到室外机侧光耦IC1、室外机侧光耦IC2、室内机侧光耦IC3、室内机侧光耦IC4回到直流电24V负极，24V的负极连接室内机电流环通信模块30具体是连接通信模块30的输出端，24V的负极也是电流环通信模块30输出的公共地线，具体是光耦IC4的三极管发射极。开关电源模块50除了提供+24V以外，其开关变压器的其他绕组还输出其他直流电，如开关变压器的第二绕组付出第二直流电+5V，其直流电负极与24V的负极共用，为室内MCU提供工作所需的直流电源。此开关电源模块50还可以输出其他直流电为整个室外机电路提供其他工作所述的直流电，即开关电源模块50为整个室外机电路提供直流电，相对现有的室外机电路开关电源，本发明实施例的开关电源模块50的开关变压器增加一个绕组输出一组单独的直流电为电流环通讯环路提供直流电源，相对现有的电流环通讯环路的直流电源是通过交流电源通过分压电阻分压、二极管整流后再通过稳压二极管简单稳压实现的方式，省去了因功耗过大发热严重的分压电阻，同时由于只是在现有的开关电源上扩展绕组输出，PCB布线也很简单，不存在大体积的元件。
具体的如图3所示，图3为位于室内机侧的开关电源模块50的具体电路图，其开关电源主要由开关电源控制芯片IC5、开关变压器T1、电压反馈光耦IC14、稳压芯片IC7和IC6组成，其中开关变压T1有两个输出绕组，其两个绕组输出到的交流电经二极管整流和稳压芯片稳压后输出两种直流电分别为24V和5V，其中24V给电流环通信环路提供直流电源，5V给室内MCU40提供工作所需电源。
上述图2和图3中的开关电源模块50串联于交流电源的N线，也可以串联在通信连接S线上，因为室内机电流环通信模块10和室外机电流环通信模块70是通过通信连接S线和交流电源连接线L或N连接构成电流环通信环路，而开关电源模块50作用是为电流环通信环路提供直流电源，因此不论串联在通信连接S线上还是串联在交流电源连接线L或N都可以实现电流环通信环路的正常工作。
进一步的，如图4所示的空调器电流环通信电路，与图2的空调器电流环通信电路的区别是开关电源模块50串联于交流电源的L线，其开关电源模块50输出端正极即+24V连接交流电源的L线，开关电源模块50输出端负极连接室内机电流环通信模块30，图中的交流电源N线未画出，通过L和N线实现了室内机和室外机到的交流电的传输。
进一步的，如图5所示的空调器电流环通信电路，与图2的空调器电流环通信电路的区别是开关电源模块50位于室外机侧，其开关电源模块50输出24V直流电经室内侧的交流电N线输入到电流环通信环路中，其直流电经室外机侧N线到室内机侧光耦IC3、室内机侧光耦IC4、室外机侧光耦IC1、室外机侧光耦IC2回到直流电24V负极，24V的负极连接到室外机电流环通信模块20，具体是光耦IC2的三极管发射极。
进一步的，如图6所示的空调器电流环通信电路，与图5的空调器电流环通信电路的区别是开关电源模块50串联于交流电源的L线，其开关电源模块50输出端正极即+24V连接交流电源的L线，开关电源模块50输出端负极连接室外机电流环通信模块20，图中的交流电源N线未画出，通过L和N线实现了室内机和室外机到的交流电的传输。
本发明实施例提供的空调器电流环通信电路通过设置开关电源模块50并将其串联在通信连接S线或交流电源连接线上，以输出的直流电至电流环通信环路，本发明用开关电源模块50输出的直流电替代现有的电阻分压型直流供电电路，并兼容现有的电流环通信电路在空调器室内和室外之间的连接线，解决了现有的电阻分压电路中由于分压电阻功耗大发热严重的问题，同时也解决了现有的分压电阻体积大不利于PCB板布线问题。
进一步的，基于本发明空调器电流环通信电路第一实施例，本发明空调器电流环通信电路第二实施例中，如图2所示，还包括单向保护模块60，单向保护模块60串联在电流环通信环路中，为电流环通信环路提供单向直流通路。具体的单向保护模块60包括第一二极管D1，第一二极管D1串联在电流环通信环路中，其环路中的电流从第一二极管D1的正极输入从第一二极管D1的负极输出，当室内机和室外机的三根连接线L、N、S出现有两根出现反接如L、S反接时，导致电流环通信环路中引入了高压电，此时第一二极管D1起到防止高压电引起其他元件如环路中的光耦因高压过流损坏。
进一步的，为了实现更好的高压保护作用，还可以在室内机侧和室外机侧分别设置一个单向保护模块，如图2所示除了在室外机侧设置第一单向保护模块60，还进一步在室内机侧设置第二单向保护模块70，分别位于通信线S的室内机和室外机的对外接口处，组成第一单向保护模块60的第一二极管D1的负极连接通信线S的输出端口（图中未示出），组成第二单向保护模块70的第二二极管D4的正极连接通信线S的输出端口（图中未示出）。通过第一二极管D1和第二二极管D4能在当出现当室内机和室外机连接线接反导致环路引入高压时，实现更好的保护左右，防止室内和室外侧环路中的其他元件损坏。
进一步的，基于本发明空调器电流环通信电路第一实施例，本发明空调器电流环通信电路第三实施例中，如图2所示，还包括过流保护模块80，过流保护模块80串联在电流环通信环路中，为电流环通信环路提供过流保护。具体的过流保护模块80为PTC电阻R9，PTC电阻R9串联在所述电流环通信环路中，图2中PTC电阻R9串联在室内机侧，当然也可以串联在室外机侧，当电流环通信环路中出现大电流，如由于上述第二实施例中室内机和室外机连接线接反导致环路中引入高压，此时回导致环路中的电流瞬间升高，由于PTC电阻R9的特性，当通过的电流增大时，其温度升高，其阻值也随之迅速升高，阻值的升高实现了限流功能增强，起到了降低环路中电流的作用。
本发明还提供一种空调器，其中室内机和室外机通过上述空调器电流环通信电路实现二者的通信，其具体的实施方式及效果可参考上述实施例，在此不再赘述。
在本说明书的描述中，参考术语“第一实施例”、“第二实施例”、“示例”等的描述意指结合该实施例或示例描述的具体方法、装置或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、方法、装置或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种空调器电流环通信电路，其特征在于，所述空调器电流环通信电路包括室内机电流环通信模块、室外机电流环通信模块、室内MCU、室外MCU、开关电源模块；
    所述室内机电流环通信模块通过通信连接S线和交流电源连接线连接所述室外机电流环通信模块，以构成电流环通信环路；所述室内MCU和所述室外MCU通过所述电流环通信环路实现通信；所述开关电源模块串联于所述通信连接S线或交流电源连接线上，以输出直流电源至所述电流环通信环路上。
  2. 如权利要求1所述的空调器电流环通信电路，其特征在于，所述交流电源连接线为交流电源N线：
    所述开关电源模块位于空调器的室内机，所述开关电源模块输出端正极连接所述交流电源N线，所述开关电源模块输出端负极连接所述室内机电流环通信模块；或，
    所述开关电源模块位于空调器的室外机，所述开关电源模块输出端正极连接所述交流电源N线，所述开关电源模块输出端负极连接所述室外机电流环通信模块。
  3. 如权利要求1所述的空调器电流环通信电路，其特征在于，所述交流电源连接线为交流电源L线：
    所述开关电源模块位于空调器的室内机，所述开关电源模块输出端正极连接所述交流电源L线，所述开关电源模块输出端负极连接所述室内机电流环通信模块；或，
    所述开关电源模块位于空调器的室外机，所述开关电源模块输出端正极连接所述交流电源L线，所述开关电源模块输出端负极连接所述室外机电流环通信模块。
  4. 如权利要求1至3任一项所述的空调器电流环通信电路，其特征在于，所述开关电源模块包括开关变压器，所述开关变压器包括第一输出绕组；
    所述第一输出绕组输出第一直流电至所述的电流环通信环路提供直流电源。
  5. 如权利要求1至3任一项所述的空调器电流环通信电路，其特征在于，还包括单向保护模块；
    所述单向保护模块串联在所述电流环通信环路中，为所述电流环通信环路提供单向直流通路。
  6. 如权利要求5所述的空调器电流环通信电路，其特征在于，所述单向保护模块包括第一单向保护模块和第二单向保护模块，所述第一单向保护模块串联在所述电流环通信环路的室内机侧，所述第二单向保护模块串联在所述电流环通信环路的室外机侧。
  7. 如权利要求6所述的空调器电流环通信电路，其特征在于，所述第一单向保护模块包括第一二极管，所述第二单向模块包括第二二极管；
    所述第一二极管串联在所述电流环通信环路室内机侧，所述第二二极管串联在所述电流环通信环路室外机侧。
  8. 如权利要求1至3任一项所述的空调器电流环通信电路，其特征在于，还包括过流保护模块；
    所述过流保护模块串联在所述电流环通信环路中，为所述电流环通信环路提供过流保护。
  9. 如权利要求8所述的空调器电流环通信电路，其特征在于，所述过流保护模块为PTC电阻；
    所述PTC电阻串联在所述电流环通信环路中。
  10. 一种空调器，包括如权利要求1至3任一项所述的空调器电流环通信电路。
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