CN112325462A - Intelligent air conditioner metering module - Google Patents
Intelligent air conditioner metering module Download PDFInfo
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- CN112325462A CN112325462A CN202011080789.8A CN202011080789A CN112325462A CN 112325462 A CN112325462 A CN 112325462A CN 202011080789 A CN202011080789 A CN 202011080789A CN 112325462 A CN112325462 A CN 112325462A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The utility model provides an intelligence air conditioner metering module, is including the voltage sampling module of gathering the internal voltage data of air conditioner, gather the current sampling module of this internal current data of air conditioner, acquire and handle the MCU main control chip of voltage data and current data that voltage sampling module and current sampling module gathered, the EEPROM storage element of the data that storage MCU main control chip handled the completion, copy the opto-coupler isolation communication component of the current data information of air conditioner body, for the power of MCU main control chip and opto-coupler isolation communication component energy supply, voltage sampling module and current sampling module gather the voltage data and the current data of air conditioner body to carry out the calculation conversion of air conditioner body metering data in MCU main control chip, finally carry out reading of the real-time data of current air conditioner body by opto-coupler isolation communication component and copy. The design has the advantages of simple circuit, small size and capability of reading air conditioner data in real time.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an intelligent air conditioner metering module.
Background
The common air conditioner is widely applied to daily life of people because the common air conditioner has the functions of refrigeration, heating, dehumidification and the like, in the using process of the air conditioner, people can only experience the convenience and comfort brought by the functions of the air conditioner, do not care about the working state of the air conditioner, such as the current power, energy consumption and other real-time information, even if the working state of the air conditioner is wanted to be known, the existing air conditioner can not monitor the real-time state information, and can not provide the current working state information of the air conditioner intuitively and rapidly, on the other hand, in the daily maintenance and maintenance process of the air conditioner, because the current voltage, current, power and other information of the air conditioner can not be obtained, the root cause of the fault can not be judged, the maintenance and maintenance progress is slow, even the maintenance can not be carried out, and the service life of the air conditioner is influenced, resulting in waste of resources and an increase in application cost.
Disclosure of Invention
The invention aims to provide a smart air conditioner metering module which can monitor air conditioner parameters in real time and is small, exquisite, safe and reliable.
In order to solve the technical problems, the invention adopts the following technical scheme: an intelligent air conditioner metering module comprises a voltage sampling module for collecting voltage data in an air conditioner body, a current sampling module for collecting current data in the air conditioner body, an MCU (microprogrammed control unit) main control chip for acquiring and processing the voltage data and the current data collected by the voltage sampling module and the current sampling module, an EEPROM (electrically erasable programmable read-only memory) storage element for storing the data processed by the MCU main control chip, an optical coupling isolation communication element for reading the current data information of the air conditioner body, and a power supply for supplying power to the MCU main control chip and the optical coupling isolation communication element, wherein the voltage sampling module and the current sampling module collect the voltage data and the current data of the air conditioner body, calculate and convert the metering data of the air conditioner body in the MCU main control chip, and finally read and read the real-time data of the current air conditioner body;
the voltage sampling module comprises a zero line and a live line, the live line is a reference ground, the voltage sampling module is matched with a voltage division sampling resistor R16 through a high-voltage resistor R6 to perform voltage sampling, a capacitor C14 is also connected in parallel to a sampling signal VAP, a voltage division sampling resistor R18 is also connected in series to the voltage division sampling resistor R16, a capacitor C16 is also connected in series to the capacitor C14, and differential signals capable of offsetting interference signals are formed among the voltage division sampling resistor R18, the capacitor C16, the voltage division sampling resistor R16 and the capacitor C14;
the current sampling module comprises a 300u omega manganin piece, the thickness of the 300u omega manganin piece is 1.5mm, the width of the 300u omega manganin piece is 7mm, a sampled current signal is connected to the 300u omega manganin piece through a double inserting piece, then is connected to I + and I-through a twisted pair, and finally forms an RC circuit through a resistor R17, a capacitor C15, a resistor R19 and a capacitor C18 respectively, the resistance value of the RC circuit is 100R +330nF, and the bandwidth is 4.8 KHz;
the MCU main control chip adopts an ATT7039N chip packaged by 28-pin QFN28, the ATT7039N chip is vacant at 1 pin, the 2 pin is an analog signal power supply, the 2 pin is connected with VCC and externally connected with a capacitor C13, the 3 pin and the 4 pin are voltage sampling pins, the 5 pin and the 6 pin are current sampling pins, the 7 pin is grounded, the 8 pin is used as a reference and externally connected with a capacitor C10 and a capacitor C11, the 9 pin and the 10 pin are communication receiving and transmitting pins, the 11 pin is a power-down detection pin, the 11 pin carries out circuit power-down detection through a resistor R20, a resistor R23 and a resistor R27, the LVDIN detection threshold is 1.18V, the measurement is closed when the power-down is detected as the result of the 11 pin, all current data are stored to an EEPROM storage element, the 12 pin is a 1.8V power supply and externally connected with a capacitor C7, a high-level signal is output when the accumulated to 1 pulse is reached, the electric quantity detection is carried out through an external optical coupler form, the electric, 17 pin, 18 pin, 19 pin, 20 pin are chip burning mouth, 21 pin is reset pin, 21 pin is connected in parallel with a capacitor C2 through resistance R1 pull-up to VCC, when 21 pin receives low level signal larger than 2us, reset is generated, 22 pin is battery pin and 22 pin is connected to VCC and external capacitor C20,23 pin is grounded, 24 pin outputs 3.3V power and external capacitors C5 and C6, 25 pin is chip main power supply and 25 pin is connected to VCC and external capacitor C8, 26 pin is vacant, 27 pin and 28 pin are crystal oscillator pin, crystal oscillator frequency of 27 pin and 28 pin is 32.768KHz, and capacitor C9 and capacitor C12 are connected to the outside of 27 pin and 28 pin respectively.
Further, the air conditioner body comprises an air conditioner mainboard, the optical coupling isolation communication element comprises an EL816 optical coupler D1, an EL816 optical coupler D2, an optical coupler D3, an M-TXD and an M1, the current transmission ratio range is 300% -470%, the EL816 optical coupler D1 and the EL816 optical coupler D2 transmit data of the air conditioner mainboard to the MCU master control chip, the M-TXD is used for transmitting instructions to the air conditioner mainboard, the M-TXD is connected to the light emitting side of the EL816 optical coupler 483D 6 after being subjected to current limiting through a resistor R24, the other end of the light emitting side is connected to the air conditioner mainboard voltage VDD, one section of the conducting side of the EL816 optical coupler D1 is grounded, the other end of the conducting side is connected to VCC through a resistor R22 while being connected to VCC through a resistor R21, the MCU-RXD is connected to a pin 9 of the MCU master control chip, one end of the light emitting side of the optical coupler D3 is connected to VCC, the, the M-GND of air conditioner mainboard is connected to opto-coupler D3 switch on side one end, and the other end passes through resistance R28 and pulls up to mainboard power VDD, is connected to M-RXD end through resistance R26 at last, M1 is the contact pin encapsulation, and 4 row needles are installed respectively at M1 four angles, arrange the needle and include 1 zero line through hard joint lug weld on the air conditioner mainboard, and 4 row needles include 1 zero line, 1 communication mouth, and 2 no signal row needles are copied to the personnel of reading and are copied through the communication mouth and read the current data information of air conditioner body.
Further, still include the PF mouth, the PF mouth is connected with resistance R3, can detect measurement electric quantity precision through the external connection opto-coupler.
Further, the power supply is connected with a live wire L and a zero wire N and then is connected with a transformer through a 3.15A/250V fuse F1, a 14K681 piezoresistor RV1 and a MZ11-06E102-202RM10D391 thermistor RT1, the power supply is packaged in a shell by adopting a plastic material with the model of PA66-30GF, quartz is arranged between the shell and the 14K681 piezoresistor RV1, the shell and the quartz form explosion-proof protection, the rear end of the transformer is connected with a rectifier bridge U2, the rear end of the rectifier bridge U2 is connected with a 470uF electrolytic capacitor E1 and a 0.1uF patch capacitor C4, the rectified voltage is 11V, and the rear ends of the electrolytic capacitor E1 and the patch capacitor C4 are connected with a 7380 voltage stabilizing tube U1 and a 7380 voltage stabilizing tube U1, so that the voltage supplied to the MCU main control chip, the EEPROM storage element and the isolation communication element is stabilized to be 3.3V.
Furthermore, the rear end of the 7380 voltage regulator tube U1 is connected with a 0.1uF capacitor C3 and a 10uF capacitor C1, and the capacitor C3 and the capacitor C1 enable the 3.3V voltage supplied to the MCU main control chip, the EEPROM storage element and the optical coupling isolation communication element to be more stable.
Further, EEPROM memory element adopts the model to be FM24C 04D's memory chip, memory chip is including storing 1 foot, storage 2 feet, storage 3 feet, storage 4 feet, storage 5 feet, storage 6 feet, storage 7 feet, storage 8 feet, storage 1 foot, storage 2 feet, storage 3 feet are address bit and direct connection to ground, storage 4 feet ground connection, storage 5 feet are the data transmission foot, and storage 5 feet pull up to the VCC through resistance R14, storage 6 feet are clock signal foot and pull up to VCC through resistance R15, storage 7 feet are for writing into the protection foot, and storage 7 feet pull up to VCC through resistance R30, and MCU main control chip output low level control data write in when needing to carry out data writing, storage 8 feet are power input foot, and storage 8 feet are connected to VCC and external electric capacity C17.
The invention has the beneficial effects that: the invention obtains the real-time running condition in the air conditioner body through the common cooperation of the voltage sampling module and the current sampling module, converts the real-time running condition into a digital signal and transmits the digital signal into the MCU main control chip, carries out real-time processing on related data such as real-time voltage, real-time current, real-time power, energy consumption and the like in the MCU main control chip, finally transmits the currently obtained real-time data into the EEPROM storage element by the MCU main control chip to finish the storage of the real-time data and reads the current air conditioner running information and data by the optical coupling isolation communication element, compared with the problem that the existing air conditioner can not obtain the current running condition and data of the air conditioner, the invention can conveniently and rapidly obtain the current running condition and data of the air conditioner through the design, the whole circuit is safe and reliable, and the application of some detection elements with complex structure and higher application cost, the application cost is greatly reduced, the air conditioner data reading device is suitable for most air conditioners on the market, meanwhile, due to the design of direct reading and reading, a great deal of more complex operations in data acquisition are directly reduced, the whole operation is simple and convenient, data acquisition of some air conditioners (such as central air conditioners and the like which are difficult to perform data reading operation) is more convenient, in the aspect of maintenance and overhaul, after real-time data of the air conditioners are acquired, the maintenance personnel can conveniently perform targeted maintenance and repair on the air conditioners according to the actual conditions of the air conditioners, the maintenance work efficiency is greatly improved, the idle work in the maintenance and repair process is reduced, the integral use of the air conditioners is facilitated, and a solid foundation is laid for smart homes.
Drawings
Fig. 1 is a work flow diagram of an intelligent air conditioner metering module.
Fig. 2 is a circuit diagram of a voltage sampling module.
Fig. 3 is a circuit diagram of a current sampling module.
Fig. 4 is a circuit diagram of the MCU master control chip.
Fig. 5 is a power-down detection circuit diagram of the MCU main control chip.
Fig. 6 is a circuit diagram of an optically-isolated communication element.
Fig. 7 is a power supply circuit diagram.
Fig. 8 is a circuit diagram of an EEPROM memory element.
Detailed Description
In order to make the technical means, innovative features and functions of the present invention easy to understand, the present invention will be further described below.
As shown in fig. 1-8, the technical scheme of the intelligent air conditioner metering module of the present invention includes a voltage sampling module for collecting voltage data in an air conditioner body, a current sampling module for collecting current data in the air conditioner body, an MCU main control chip for obtaining and processing the voltage data and the current data collected by the voltage sampling module and the current sampling module, an EEPROM storage element for storing data processed by the MCU main control chip, an optical coupling isolation communication element for reading current data information of the air conditioner body, and a power supply for supplying power to the MCU main control chip and the optical coupling isolation communication element, wherein the voltage sampling module and the current sampling module collect the voltage data and the current data of the air conditioner body, and perform calculation and conversion of air conditioner body metering data in the MCU main control chip, and finally perform reading and reading of current real-time data of the air conditioner body by the optical coupling isolation communication element;
the voltage sampling module comprises a zero line and a live line, the live line is a reference ground, the voltage sampling module is matched with a voltage division sampling resistor R16 through a high-voltage resistor R6 to perform voltage sampling, a capacitor C14 is also connected in parallel to a sampling signal VAP, a voltage division sampling resistor R18 is also connected in series to the voltage division sampling resistor R16, a capacitor C16 is also connected in series to the capacitor C14, and differential signals capable of offsetting interference signals are formed among the voltage division sampling resistor R18, the capacitor C16, the voltage division sampling resistor R16 and the capacitor C14;
the current sampling module comprises a 300u omega manganin piece, the thickness of the 300u omega manganin piece is 1.5mm, the width of the 300u omega manganin piece is 7mm, a sampled current signal is connected to the 300u omega manganin piece through a double inserting piece, then is connected to I + and I-through a twisted pair, and finally forms an RC circuit through a resistor R17, a capacitor C15, a resistor R19 and a capacitor C18 respectively, the resistance value of the RC circuit is 100R +330nF, and the bandwidth is 4.8 KHz;
the MCU main control chip adopts an ATT7039N chip packaged by 28-pin QFN28, the ATT7039N chip is vacant at 1 pin, the 2 pin is an analog signal power supply, the 2 pin is connected with VCC and externally connected with a capacitor C13, the 3 pin and the 4 pin are voltage sampling pins, the 5 pin and the 6 pin are current sampling pins, the 7 pin is grounded, the 8 pin is used as a reference and externally connected with a capacitor C10 and a capacitor C11, the 9 pin and the 10 pin are communication receiving and transmitting pins, the 11 pin is a power-down detection pin, the 11 pin carries out circuit power-down detection through a resistor R20, a resistor R23 and a resistor R27, the LVDIN detection threshold is 1.18V, the measurement is closed when the power-down is detected as the result of the 11 pin, all current data are stored to an EEPROM storage element, the 12 pin is a 1.8V power supply and externally connected with a capacitor C7, a high-level signal is output when the accumulated to 1 pulse is reached, the electric quantity detection is carried out through an external optical coupler form, the electric, 17 pin, 18 pin, 19 pin, 20 pin are chip burning mouth, 21 pin is reset pin, 21 pin is connected in parallel with a capacitor C2 through resistance R1 pull-up to VCC, when 21 pin receives low level signal larger than 2us, reset is generated, 22 pin is battery pin and 22 pin is connected to VCC and external capacitor C20,23 pin is grounded, 24 pin outputs 3.3V power and external capacitors C5 and C6, 25 pin is chip main power supply and 25 pin is connected to VCC and external capacitor C8, 26 pin is vacant, 27 pin and 28 pin are crystal oscillator pin, crystal oscillator frequency of 27 pin and 28 pin is 32.768KHz, and capacitor C9 and capacitor C12 are connected to the outside of 27 pin and 28 pin respectively.
In a preferred embodiment of the invention, the air conditioner body comprises an air conditioner mainboard, the optical coupling isolation communication element comprises an EL816 optical coupler D1, an EL816 optical coupler D2, an optical coupler D3, an M-TXD and an M1, the current transmission ratio range is 300% -470%, the EL816 optical coupler D1 and the EL816 optical coupler D2 transmit data of the air conditioner mainboard to an MCU main control chip, the M-TXD is an air conditioner mainboard transmission instruction, the M-TXD is connected to a light emitting side of the EL816 optical coupler D1 after being subjected to current limiting through a resistor R24, the other end of the light emitting side is connected to an air conditioner mainboard voltage VDD, one section of a conducting side of the EL816 optical coupler D1 is grounded, the other end of the EL816 optical coupler is connected to VCC through a resistor R21 and is also connected to an MCU-RXD through a resistor R22, the MCU-RXD is connected to a pin 9 of the MCU main control chip, one end of the light emitting side, the MCU-TXD is connected to a pin 10 of the MCU main control chip, one end of the conduction side of the optocoupler D3 is connected with an M-GND of an air conditioner mainboard, the other end of the optocoupler is pulled up to a mainboard power supply VDD through a resistor R28 and is finally connected to an M-RXD end through a resistor R26, the M1 is a contact pin package, 4 row pins are respectively installed at four corners of the M1 and are directly welded on the air conditioner mainboard through hard connection, the 4 row pins comprise 1 zero line, 1 communication port and 2 signal-free row pins, a reading person reads current data information of an air conditioner body through the communication port and also comprises a PF port, the PF port is connected with a resistor R3 and can detect the precision of the electric quantity to be measured through the external optocoupler, the reading person can read the current data information of voltage, current, power, electric quantity, frequency and the like of the air conditioner through the communication port and can calibrate the, compared with the prior art, the metering device is more accurate and visual, the metering precision of the whole metering module is improved, and the metering error inevitably generated in the metering process is reduced.
In one embodiment of the invention, the power supply is connected with a live wire L and a zero wire N and then is connected with a transformer through a 3.15A/250V fuse F1, a 14K681 piezoresistor RV1 and an MZ11-06E102-202RM10D391 thermistor RT1, the power supply is encapsulated by a PA66-30GF plastic material, quartz is arranged between the housing and the 14K681 piezoresistor RV1 to form explosion-proof protection, the rear end of the transformer is connected with a rectifier bridge U2, the rear end of the rectifier bridge U2 is connected with a 470uF electrolytic capacitor E1 and a 0.1uF patch capacitor C4 to enable the rectified voltage to be 11V, the rear ends of the electrolytic capacitor E1 and the patch capacitor C4 are connected with a 7380 tube U1, a voltage regulator U1 enables the voltage supplied to an MCU chip, an EEPROM main control storage element and an optical coupler communication element to be stabilized at 3.3V, the rear end of the optical coupler capacitor E8280 and the patch capacitor C4 is connected with a stabilized voltage regulator tube U3638 and a stabilized voltage regulator U3638U 3, the capacitor C3 and the capacitor C1 enable the 3.3V voltage supplied to the MCU main control chip, the EEPROM storage element and the optical coupling isolation communication element to be more stable.
In an embodiment of the present invention, since the EEPROM storage element needs to perform data storage for a long time and data erasure and writing under a long-time operating state, in order to improve the operating stability of the EEPROM storage element and ensure that the EEPROM storage element can normally and stably perform data storage and processing, the EEPROM storage element employs a memory chip of model FM24C04D, the memory chip includes a memory 1 pin, a memory 2 pin, a memory 3 pin, a memory 4 pin, a memory 5 pin, a memory 6 pin, a memory 7 pin and a memory 8 pin, the memory 1 pin, the memory 2 pin and the memory 3 pin are address bits and are directly connected to ground, the memory 4 pin is grounded, the memory 5 pin is a data transmission pin, the memory 5 pin is pulled up to VCC through a resistor R14, the memory 6 pin is a clock signal pin and is pulled up to VCC through a resistor R15, the memory 7 pin is a write protection pin, the memory 7 pin is pulled up to VCC through a resistor R30, when data writing needs to be carried out, the MCU main control chip outputs low-level control data to be written, the storage 8 pins are power input pins, the storage 8 pins are connected to VCC and are externally connected with a capacitor C17, the erasing frequency of the storage chip is 1000000, the data retention time reaches 40 years, normal work can be carried out for a long time, data can be stably stored, the problem that the data are difficult to recover and even damaged due to faults or other reasons is solved, and the stability of data storage is improved.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides an intelligence air conditioner metering module which characterized in that: the intelligent air conditioner comprises a voltage sampling module for collecting voltage data in an air conditioner body, a current sampling module for collecting current data in the air conditioner body, an MCU (microprogrammed control unit) main control chip for acquiring and processing the voltage data and the current data collected by the voltage sampling module and the current sampling module, an EEPROM (electrically erasable programmable read-only memory) storage element for storing the data processed by the MCU main control chip, an optical coupling isolation communication element for reading the current data information of the air conditioner body, and a power supply for supplying power to the MCU main control chip and the optical coupling isolation communication element, wherein the voltage sampling module and the current sampling module collect the voltage data and the current data of the air conditioner body, the calculation and conversion of the metering data of the air conditioner body are carried out in the MCU main control chip, and finally the optical coupling isolation;
the voltage sampling module comprises a zero line and a live line, the live line is a reference ground, the voltage sampling module is matched with a voltage division sampling resistor R16 through a high-voltage resistor R6 to perform voltage sampling, a capacitor C14 is also connected in parallel to a sampling signal VAP, a voltage division sampling resistor R18 is also connected in series to the voltage division sampling resistor R16, a capacitor C16 is also connected in series to the capacitor C14, and differential signals capable of offsetting interference signals are formed among the voltage division sampling resistor R18, the capacitor C16, the voltage division sampling resistor R16 and the capacitor C14;
the current sampling module comprises a 300u omega manganin piece, the thickness of the 300u omega manganin piece is 1.5mm, the width of the 300u omega manganin piece is 7mm, a sampled current signal is connected to the 300u omega manganin piece through a double inserting piece, then is connected to I + and I-through a twisted pair, and finally forms an RC circuit through a resistor R17, a capacitor C15, a resistor R19 and a capacitor C18 respectively, the resistance value of the RC circuit is 100R +330nF, and the bandwidth is 4.8 KHz;
the MCU main control chip adopts an ATT7039N chip packaged by 28-pin QFN28, the ATT7039N chip is vacant at 1 pin, the 2 pin is an analog signal power supply, the 2 pin is connected with VCC and externally connected with a capacitor C13, the 3 pin and the 4 pin are voltage sampling pins, the 5 pin and the 6 pin are current sampling pins, the 7 pin is grounded, the 8 pin is used as a reference and externally connected with a capacitor C10 and a capacitor C11, the 9 pin and the 10 pin are communication receiving and transmitting pins, the 11 pin is a power-down detection pin, the 11 pin carries out circuit power-down detection through a resistor R20, a resistor R23 and a resistor R27, the LVDIN detection threshold is 1.18V, the measurement is closed when the power-down is detected as the result of the 11 pin, all current data are stored to an EEPROM storage element, the 12 pin is a 1.8V power supply and externally connected with a capacitor C7, a high-level signal is output when the accumulated to 1 pulse is reached, the electric quantity detection is carried out through an external optical coupler form, the electric, 17 pin, 18 pin, 19 pin, 20 pin are chip burning mouth, 21 pin is reset pin, 21 pin is connected in parallel with a capacitor C2 through resistance R1 pull-up to VCC, when 21 pin receives low level signal larger than 2us, reset is generated, 22 pin is battery pin and 22 pin is connected to VCC and external capacitor C20,23 pin is grounded, 24 pin outputs 3.3V power and external capacitors C5 and C6, 25 pin is chip main power supply and 25 pin is connected to VCC and external capacitor C8, 26 pin is vacant, 27 pin and 28 pin are crystal oscillator pin, crystal oscillator frequency of 27 pin and 28 pin is 32.768KHz, and capacitor C9 and capacitor C12 are connected to the outside of 27 pin and 28 pin respectively.
2. The intelligent air conditioner metering module of claim 1, wherein: the air conditioner body comprises an air conditioner mainboard, the optical coupling isolation communication element comprises an EL816 optical coupling D1, an EL816 optical coupling D2, an optical coupling D3, an M-TXD and an M1, the current transmission ratio range is 300% -470%, the EL816 optical coupling D1 and the EL816 optical coupling D2 transmit data of the air conditioner mainboard to an MCU master control chip, the M-TXD is used for transmitting instructions for the air conditioner mainboard, the M-TXD is connected to a light emitting side of the EL816 optical coupling D1 after being subjected to current limiting through a resistor R24, the other end of the light emitting side is connected to an air conditioner mainboard voltage VDD, one section of the conducting side of the EL816 optical coupling D1 is grounded, the other end of the conducting side is connected to VCC through a resistor R22 while being connected to the VCC through a resistor R21, the MCU RXD is connected to a pin 9 of the MCU master control chip, one end of the light emitting side of the optical coupling D3 is connected to VCC, the, the M-GND of air conditioner mainboard is connected to opto-coupler D3 switch on side one end, and the other end passes through resistance R28 and pulls up to mainboard power VDD, is connected to M-RXD end through resistance R26 at last, M1 is the contact pin encapsulation, and 4 row needles are installed respectively at M1 four angles, arrange the needle and include 1 zero line through hard joint lug weld on the air conditioner mainboard, and 4 row needles include 1 zero line, 1 communication mouth, and 2 no signal row needles are copied to the personnel of reading and are copied through the communication mouth and read the current data information of air conditioner body.
3. The intelligent air conditioner metering module of claim 2, wherein: still include the PF mouth, the PF mouth is connected with resistance R3, can detect measurement electric quantity precision through the external connection opto-coupler.
4. The smart air conditioner metering module as claimed in claim 1, 2 or 3, wherein: the power supply is connected with a live wire L and a zero wire N and then is connected with a transformer through a 3.15A/250V fuse F1, a 14K681 voltage dependent resistor RV1 and an MZ11-06E102-202RM10D391 thermal resistor RT1, the power supply is packaged in a shell by adopting a plastic material with the model number of PA66-30GF, quartz stones are arranged between the shell and the 14K681 voltage dependent resistor RV1 to form explosion-proof protection, the rear end of the transformer is connected with a rectifier bridge U2, the rear end of the rectifier bridge U2 is connected with a 470uF electrolytic capacitor E1 and a 0.1uF patch capacitor C4, so that the rectified voltage is 11V, and the rear ends of the electrolytic capacitor E1 and the patch capacitor C4 are connected with a 7380 voltage regulator U1 and the 7380 voltage regulator U1 ensure that the voltage supplied to the MCU main control chip, the EEPROM storage element and the isolation communication element is stabilized to be 3.3V.
5. The intelligent air conditioner metering module of claim 4, wherein: the rear end of the 7380 voltage regulator tube U1 is connected with a 0.1uF capacitor C3 and a 10uF capacitor C1, and the capacitor C3 and the capacitor C1 enable the 3.3V voltage supplied to the MCU main control chip, the EEPROM storage element and the optical coupling isolation communication element to be more stable.
6. The smart air conditioner metering module as recited in claim 1, 2, 3 or 5, wherein: EEPROM memory element adopts the model to be FM24C 04D's memory chip, memory chip is including saving 1 foot, storage 2 feet, storage 3 feet, storage 4 feet, storage 5 feet, storage 6 feet, storage 7 feet, storage 8 feet, storage 1 foot, storage 2 feet, storage 3 feet are address bit and direct connection to ground, storage 4 feet ground connection, storage 5 feet are the data transmission foot, and storage 5 feet pull up to VCC through resistance R14, storage 6 feet are clock signal foot and pull up to VCC through resistance R15, storage 7 feet are for writing into the protection foot, and storage 7 feet pull up to VCC through resistance R30, and the main control chip output low level control data write in when needing to carry out data writing, storage 8 feet are power input foot, and storage 8 feet are connected to VCC and external capacitor C17.
7. The intelligent air conditioner metering module of claim 4, wherein: EEPROM memory element adopts the model to be FM24C 04D's memory chip, memory chip is including saving 1 foot, storage 2 feet, storage 3 feet, storage 4 feet, storage 5 feet, storage 6 feet, storage 7 feet, storage 8 feet, storage 1 foot, storage 2 feet, storage 3 feet are address bit and direct connection to ground, storage 4 feet ground connection, storage 5 feet are the data transmission foot, and storage 5 feet pull up to VCC through resistance R14, storage 6 feet are clock signal foot and pull up to VCC through resistance R15, storage 7 feet are for writing into the protection foot, and storage 7 feet pull up to VCC through resistance R30, and the main control chip output low level control data write in when needing to carry out data writing, storage 8 feet are power input foot, and storage 8 feet are connected to VCC and external capacitor C17.
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