A DC brushless fan coil air conditioner charging metering system

Abstract

The present invention relates to the technical field of air conditioning billing, specifically a DC brushless fan coil air conditioning charging metering system, comprising a data collector T1, an energy consumption metering device T2, a state controller, and a billing system software; the data collector T1 is used to collect and store the power consumption information of the DC brushless fan calculated by the DC fan coil meter, and is connected to a computer; the energy consumption metering device T2 is used to measure the energy consumption of the DC brushless fan. The DC brushless fan coil air conditioning charging metering system can reasonably measure the air conditioning fee for each household, collect fees, print reports, etc. through the DC fan coil meter, collection terminal, computer terminal, and system software. It can effectively and reasonably and fairly apportion and collect air conditioning operating expenses, effectively improve the property management level, and solve the problem that DC brushless fan coil air conditioners cannot be charged.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning billing, and in particular to a charging metering system for a DC brushless fan coil air conditioning. Background Art

[0002] DC brushless fan coil units have the advantages of energy saving, stepless speed regulation, quietness, and long life, so they are widely used in many new construction projects, and are increasingly recognized and favored by the market. With the widespread application of DC brushless fan coil units, the collection of air conditioning fees has become a management difficulty for property management. The existing technology is unscientific and unreasonable through area allocation, and it is impossible to measure according to the high, medium, and low-speed operation time of the previous AC fan coil units. The main operating expenses of the DC brushless fan coil air conditioning system are the power consumption of the air conditioning host and auxiliary equipment such as cooling pumps and circulating pumps, employee wages, water fees, taxes and other expenses. The unit price can be calculated by the sum of the cooling (heating) capacity of all air-conditioning DC brushless fan coil units under the rated power, and the cooling (heating) capacity can be converted according to the energy consumption measured by the DC fan coil meter for charging. How to effectively and reasonably and fairly allocate and collect the air conditioning operating costs, effectively improve the level of property management, and solve the problem that DC brushless fan coil air conditioners cannot be charged. Summary of the invention

[0003] The object of the present invention is to provide a DC brushless fan coil air conditioner fee metering system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A DC brushless fan coil air conditioner charging metering system, comprising a data collector T1, an energy consumption metering device T2, a state controller, and a charging system software;

[0006] The data collector T1 is used to collect and store the power consumption information of the DC brushless fan calculated by the DC fan coil meter, and is connected to the computer;

[0007] The energy consumption metering device T2 is used to measure the energy consumption of the DC brushless fan, and the energy consumption metering device T2 uses a TKD-S800 DC fan coil meter to calculate the power consumption of the DC brushless fan;

[0008] The state controller adopts electronic monitoring technology and uses a display to display the working state, wind speed of the DC brushless fan, indoor temperature, and set temperature to understand the operating state of the DC brushless fan;

[0009] The billing system software is used to formulate charging standards and charge fees by comprehensively considering the energy consumption measured by the DC fan coil meter, staff wages, water charges, taxes and other costs.

[0010] Preferably, the data collector T1 is connected to the energy consumption metering device T2 via an RS485 bus. The RS485 bus connection adopts single-point grounding, and a single shielded wire is grounded. The data collector T1 is connected in series with the energy consumption metering device T2a, the energy consumption metering device T2b and the energy consumption metering device T2x via an RS485 bus.

[0011] Preferably, the data collector T1 is connected to the computer via Ethernet, the computer terminal is connected to the wireless network, and the power consumption information of the DC brushless fan is transmitted between the computer terminal and the data collector T1 via Ethernet, and the Ethernet is connected via RJ45 interface communication.

[0012] Preferably, the energy consumption metering device T2 is connected in series in the power supply circuit of the DC brushless fan coil unit. The DC brushless fan is mainly composed of three parts: a motor body, a Hall position sensor and an electronic switch circuit. The stator and the rotor constitute the motor body. The stator winding is divided into three phases A, B, and C. The phase difference between each phase is 120°, and a star connection is adopted. Transistors Q1, Q2 and Q3 serve as power switches of the three-phase windings A, B, and C, respectively, and are respectively connected to the corresponding power switch devices in the electronic switch circuit. The rotor consists of two poles: a magnetic pole N and a magnetic pole S.

[0013] Preferably, the state controller contains a temperature control module, a humidity control module and a display module; the temperature control module includes a thermistor R1, the thermistor R1 is connected in series with a fixed resistor R3, the fixed resistor R2 is connected in series with a diode D1 and then connected in parallel with the thermistor R1, a filter capacitor C1 is connected in parallel with the thermistor R1, one end of the series-connected thermistor R1 and the fixed resistor is grounded, and one end is connected to a power supply VCC, the end connected to the thermistor is connected to the positive pole of amplifier one, one end of the fixed resistor R4 is grounded and the other end is connected to the negative pole of amplifier one, the output end of the amplifier is respectively connected to the fixed resistor R5 and the fixed resistor R6, the fixed resistor R5 is connected in series with the fixed resistor R4, the fixed resistor R6 is connected to the display module, the positive pole of the comparator is connected to the fixed resistor R6, the negative pole of the comparator is connected to the comparison voltage, one end of the capacitor C2 is connected between the fixed resistor R6 and the comparator one, the other end of the capacitor C2 is grounded, and the output end of the comparator is connected to the feedback adjustment device, thereby forming a temperature control module for temperature control.

[0014] Preferably, the state controller has a humidity control module including a humidity-sensitive resistor R2, which is connected in series with a fixed resistor R1, and the other end of the fixed resistor R1 is connected to a power supply VCC, and fixed resistors R3, R4 and R5 are connected in series, the negative pole of comparator 1 is connected between the fixed resistor R1 and the photoresistor R2, the positive pole of comparator 1 is connected between the fixed resistor R3 and the fixed resistor R4, the negative pole of comparator 1 is connected to the positive pole of comparator 2, the negative pole of comparator 2 is connected between the fixed resistor R4 and the fixed resistor R5, one end of the fixed resistor R5 is connected to the fixed resistor R4, and the other end is grounded, the output end of comparator 1 is connected to the fixed resistor R6, and the other end is connected to the feedback adjustment device, and one end of the fixed resistor R7 is connected to the output end of comparator 2, and the other end is connected to the feedback adjustment device.

[0015] Preferably, the state controller has a display module, which is used to display the working status, DC brushless fan speed, indoor temperature, and set temperature. The working status displays the working mode of the DC brushless fan, and the working modes include cooling, heating, humidification and drying. The display module has an adjustment button, which is used to adjust the working mode, set temperature and DC brushless fan speed of the DC brushless fan.

[0016] Preferably, the billing system software is located on a computer terminal, and the billing system software is used to calculate the air conditioning cost of each coil. The method is to input the staff's maintenance and repair hours and costs, water charges, taxes and other cost coefficients into the billing system software by running the billing system software on the computer, and then input the energy consumption measured by the DC fan coil meter into the billing system software to convert the cooling or heating cost to obtain the charging fee.

[0017] Preferably, the temperature control module and the humidity control module monitor the temperature signal and the humidity signal through the temperature and humidity sensor chip. The temperature and humidity sensor chip SHT2x consists of a clock pin SCL, a data pin SDA, a ground pin VSS, a power pin VDD and a non-connection pin NC. The data pin SDA is connected to the IO port of the MCU, and then connected to the pull-up resistor R1, R1 is then connected to the power supply VDD, the power supply pin VDD is directly connected to the power supply VDD, the ground pin VSS is directly grounded, an isolation capacitor C is connected between the ground pin VSS and the power supply pin VDD, the IO2 port of the MCU is connected to a pull-up resistor R2, and the pull-up resistor R2 is then connected to the power supply VDD, and the two non-connection pins NC of the temperature and humidity sensor chip SHT2x are left floating and not connected, forming a temperature and humidity control module and a humidity control module.

[0018] Preferably, the state controller transmits the state information to the display module for display through UTC-I2C wireless communication, the GPIO port of the MCU is connected to the SET_A pin of the UTC, the sending signal pin TXD and the receiving signal pin RXD of the MCU are correspondingly connected to the receiving signal pin RXD and the sending signal pin TXD of the UTC, the EXTRNT pin of the MCU is connected to the AUX channel pin of the UTC, the GPIO port of the MCU is connected to the SET_B pin of the UTC, the power pin VCC is connected to the power supply, and the ground pin GND is grounded.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the DC brushless fan coil air conditioner charging metering system can reasonably measure the air conditioning fee for each household, collect fees, print reports, etc. through the DC fan coil meter, collection terminal, computer terminal, and system software. It can effectively and reasonably and fairly apportion and collect air conditioning operating fees, effectively improve the property management level, and solve the problem that DC brushless fan coil air conditioners cannot be charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of brushless fan coil metering in a preferred embodiment of the present invention;

[0021] Figure 2 A schematic diagram of connecting multiple brushless fan coil units in a preferred embodiment of the present invention;

[0022] Figure 3 This is a connection diagram of an energy consumption metering device in a preferred embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the fan structure in a preferred embodiment of the present invention;

[0024] Figure 5 A circuit diagram of a temperature control module in a preferred embodiment of the present invention;

[0025] Figure 6 A circuit diagram of a humidity control module in a preferred embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of sensor chip connection in a preferred embodiment of the present invention;

[0027] Figure 8 This is an internal circuit diagram of a state controller in a preferred embodiment of the present invention; DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-8 , the present invention provides a technical solution:

[0030] refer to Figure 1 , an embodiment of the present invention provides a DC brushless fan coil air conditioner charging metering system, including a data collector T1, an energy consumption metering device T2, a state controller, and a charging system software;

[0031] The data collector T1 is used to collect and store the power consumption information of the DC brushless fan calculated by the DC fan coil meter, and is connected to the computer;

[0032] The energy consumption metering device T2 is used to measure the energy consumption of the DC brushless fan, and the energy consumption metering device T2 uses the TKD-S800 DC fan coil meter to calculate the power consumption of the DC brushless fan;

[0033] The state controller adopts electronic monitoring technology, and uses a display to display the working status, DC brushless fan wind speed, indoor temperature, set temperature, and understand the operating status of the DC brushless fan;

[0034] The billing system software is used to formulate charging standards and charge fees by comprehensively considering the energy consumption measured by the DC fan coil meter, staff wages, water charges and taxes.

[0035] refer to Figures 2 to 3In the embodiment of the present invention, the data collector T1 is connected to the energy consumption metering device T2 via the RS485 bus. The RS485 bus connection adopts single-point grounding, and a single shielded line is grounded. The data collector T1 is connected in series with the energy consumption metering device T2a, the energy consumption metering device T2b and the energy consumption metering device T2x via the RS485 bus. The RS485 bus is used as a data transmission link to realize half-duplex asynchronous communication. This is because, on the one hand, the RS485 standard, as an electrical specification for multi-point, differential data transmission, has become one of the most widely used standard communication interfaces in the industry. This communication interface allows multi-point, two-way communication on a simple pair of twisted pairs. Each terminal only needs to be hung on the bus through the interface to realize a true multi-point bus structure. Its noise suppression capability, data transmission rate, cable length and reliability are unmatched by other standards. On the other hand, the RS485 standard only stipulates the electrical characteristics of the interface, and does not involve connectors, cables or protocols. On this basis, users can establish their own high-level communication protocols. RS-485 bus does not support ring or star network. Although it can still work normally in some cases (such as short distance, low rate, small interference, etc.), as the communication distance increases or the communication rate increases, its adverse effects will become more and more serious, and even communication failures will occur. The main reason is that the signal is reflected at the end of each branch and superimposed on the original signal, causing the signal quality to decrease. Therefore, when we use energy consumption metering device T2, multiple energy consumption metering devices T2 are connected in series and then connected to the data collector T1.

[0036] refer to Figure 4In the embodiment of the present invention, the data collector T1 is connected to the computer via Ethernet, the computer terminal is connected to the wireless network, and the power consumption information of the DC brushless fan is transmitted between the computer terminal and the data collector T1 via Ethernet, and connected via the Ethernet interface RJ45. The data collector T1 is first connected to the energy consumption metering device T2 via the RS485 bus. The energy consumption metering device T2 is used as a DC fan coil meter to measure and calculate the energy consumption of all air-conditioning DC brushless fan coils, and then the calculated energy consumption data is transmitted to the data collection storage device T1 via the RS485 bus specification. The data collection storage device T1 is connected to the computer terminal via Ethernet and connected using the RJ45 interface, which can quickly and effectively transmit the energy consumption data transmitted by the energy consumption metering device T2 to the computer terminal. The energy consumption metering device T2 is connected in series in the power supply circuit of the DC brushless fan coil. The DC brushless fan mainly consists of three parts: the motor body, the Hall position sensor and the electronic switch circuit. The motor body is composed of the stator and the rotor. The stator winding is divided into three phases, A, B and C. The phase difference of each phase is 120°. The star connection is adopted. The transistors Q1, Q2 and Q3 are used as power switches for the three-phase windings A, B and C respectively, and are connected to the corresponding power switch devices in the electronic switch circuit respectively. The rotor consists of two poles, N and S. The electronic switch circuit is used to control the order and time of power-on of each phase winding on the motor stator. It mainly consists of two parts: the power logic switch unit and the Hall position sensor signal processing unit. The power logic switch unit distributes the power of the power supply to each phase winding on the motor stator in a certain logical distribution relationship so that the motor can generate continuous torque. The function of the Hall position detector is to detect the position signal of the rotor magnetic pole relative to the stator winding, and then control the conduction order and time of each phase winding of the logic switch unit. When one phase of the stator winding is energized, the current interacts with the magnetic field generated by the magnetic poles of the rotor permanent magnets to generate torque, driving the rotor to rotate. The Hall position sensor then converts the rotor magnet position into an electrical signal to control the electronic switch circuit, so that the stator phase windings are turned on in a certain order, and the stator phase current changes phase in a certain order as the rotor position changes. Since the turn-on order of the electronic switch circuit is synchronized with the rotor angle, it plays the commutation role of the mechanical commutator.

[0037] refer to Figures 5 to 7The state controller includes a temperature control module, a humidity control module and a display module; the temperature control module includes a thermistor R1, the thermistor R1 is connected in series with a fixed resistor R3, the fixed resistor R2 is connected in series with a diode D1 and then connected in parallel with the thermistor R1, the filter capacitor C1 is connected in parallel with the thermistor R1, the thermistor R1 and the fixed resistor are connected in series at one end to ground, and the other end is connected to the power supply VCC, the end connected to the thermistor is connected to the positive pole of the amplifier, the fixed resistor R4 is connected to the ground at one end and connected to the negative pole of the amplifier, the output end of the amplifier is respectively connected to the fixed resistor R5 and the fixed resistor R6, the fixed resistor R5 is connected in series with the fixed resistor R4, the fixed resistor R6 is connected to the display module, the positive pole of the comparator is connected to the fixed resistor R6, the negative pole of the comparator is connected to the comparison voltage, one end of the capacitor C2 is connected between the fixed resistor R6 and the comparator, the other end of the capacitor C2 is grounded, and the output of the comparator is connected to the fixed resistor R6. The output terminal is connected to a feedback adjustment device to form a temperature control module for temperature control. The temperature control module mainly controls the temperature by observing that different resistances correspond to different voltage values ​​at different temperatures. Generally, as the temperature rises, the resistance value gradually increases. Thermistor R1 is connected in series with a fixed resistor R3 for voltage division. When the temperature changes, the resistance value of thermistor R1 also changes, which will cause the voltage on thermistor R1 to change. The changed voltage signal can be used to indicate the temperature of the environment at this time. After the voltage signal is amplified by the amplifier and filtered by the capacitor, it is more accurately input into the comparator for comparison with the comparison voltage. When the comparison voltage is exceeded or it is no longer within the set comparison voltage range, a signal will be sent to the feedback adjustment device at the back end. The feedback adjustment device will understand the temperature condition based on the obtained voltage condition and make corresponding feedback adjustments.

[0038] The state controller includes a humidity control module including a humidity-sensitive resistor R2, which is connected in series with a fixed resistor R1, and the other end of the fixed resistor R1 is connected to a power supply VCC, and fixed resistors R3, R4 and R5 are connected in series, the negative pole of comparator 1 is connected between the fixed resistor R1 and the photoresistor R2, the positive pole of comparator 1 is connected between the fixed resistor R3 and the fixed resistor R4, the negative pole of comparator 1 is connected to the positive pole of comparator 2, the negative pole of comparator 2 is connected between the fixed resistor R4 and the fixed resistor R5, one end of the fixed resistor R5 is connected to the fixed resistor R4, and the other end is grounded, the output end of comparator 1 is connected to the fixed resistor R6, and the other end is connected to the feedback adjustment device, and one end of the fixed resistor R7 is connected to the output end of comparator 2, and the other end is connected to the feedback adjustment device. The resistance of the hygroscopic resistor changes with humidity. When the humidity increases, the resistance of the photoresistor decreases, and the current in the branch where the hygroscopic resistor is located decreases; conversely, when the humidity decreases, the rated resistance of the hygroscopic resistor increases, and the current in the branch where it is located increases. The voltage comparator generally has two input terminals and one output terminal. By comparing the two voltages at the input terminals, the corresponding voltage value is output after the voltage comparator is operated according to the magnitude relationship between the two input voltages. The hygroscopic resistor is used at the input terminal of the voltage comparator to adjust the magnitude of the input voltage. The input voltage obtained at different humidity will be different. Compared with the reference voltage, different voltages will be obtained at the output terminal when passing through the voltage comparator. Then, according to the output voltage at both ends, it is determined whether the humidity range is within the set range. The set humidity range can be adjusted to meet the set requirements by changing the resistance ratio between resistors R3, R4 and R5.

[0039] The state controller has a display module, which is used to display the working state, wind speed of the DC brushless fan, indoor temperature, and set temperature. The working state displays the working mode of the DC brushless fan, which includes cooling, heating, humidification, and drying. The display module has adjustment buttons, which are used to adjust the working mode, set temperature, and wind speed of the DC brushless fan. The display module can display the working properties of the DC brushless fan in the working state. The working state of the fan can be simply adjusted through the oil-carrying adjustment buttons on the display module. The fan speed of the DC fan can be adjusted, and the set temperature of the DC fan can be adjusted. Effectively mastering the operating state of the fan can verify the correctness of the DC brushless fan casing measurement.

[0040] The billing system software is located on the computer. The billing system software is used to calculate the air conditioning cost of each coil. The method is to run the billing system software on the computer, input the staff's maintenance and repair hours and costs, water charges, taxes and other cost coefficients into the billing system software, and then input the energy consumption measured by the DC fan coil meter into the billing system software to convert the cooling or heating cost to obtain the charging fee.

[0041] The state controller monitors the temperature signal and humidity signal through the temperature and humidity sensor chip. The temperature and humidity sensor chip SHT2x consists of a clock pin SCL, a data pin SDA, a ground pin VSS, a power pin VDD and a non-connected pin NC. The data pin SDA is connected to the IO port of the MCU, and then connected to the pull-up resistor R1, R1 is connected to the power supply VDD, the power supply pin VDD is directly connected to the power supply VDD, the ground pin VSS is directly grounded, an isolation capacitor C is connected between the ground pin VSS and the power supply pin VDD, the IO2 port of the MCU is connected to a pull-up resistor R2, and the pull-up resistor R2 is connected to the power supply VDD. The two non-connected pins NC of the temperature and humidity sensor chip SHT2x are suspended and not connected, forming a temperature and humidity control module and a humidity control module. The temperature and humidity sensor chip is connected to the GPIO of the MCU, and the temperature and humidity signals can be directly captured through the temperature and humidity sensor chip, and then sent to the feedback control module through the MCU processing to adjust the temperature and humidity.

[0042] refer to Figure 8 , the GPIO port of MCU is connected to the SET_A pin of UTC, the sending signal pin TXD and receiving signal pin RXD of MCU are connected to the receiving signal pin RXD and sending signal pin TXD of UTC respectively, the EXTRNT pin of MCU is connected to the AUX channel pin of UTC, the GPIO port of MCU is connected to the SET_B pin of UTC, the power pin VCC is connected to the power supply, and the ground pin GND is connected to the ground. MCU transmits information to UTC through TX / RX, and UTC-I2C wireless communication transmits the received status information to the display module for display, which can easily and easily understand the operating status of the fan.

[0043] In the embodiment of the present invention, the energy consumption of the brushless DC fan coil unit is measured by connecting the energy consumption metering device T2 in series to the brushless DC fan coil unit, and then the data collector T1 is connected to the energy consumption metering device T2 via the RS485 bus, and the energy consumption information of the brushless DC fan coil unit is transmitted to the computer terminal via Ethernet. The billing system software of the computer terminal formulates the charging standard based on the comprehensive consideration of the energy consumption measured by the DC fan coil unit meter, the staff salary, water fee and tax, and then calculates the final charging fee to realize fair and reasonable collection of air conditioning fees.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A DC brushless fan coil air conditioner charging metering system, characterized in that: It includes data collector T1, energy consumption metering device T2, state controller and billing system software; The data collector T1 is used to collect and store the power consumption information of the DC brushless fan calculated by the DC fan coil meter, and is connected to the computer; The energy consumption metering device T2 is used to measure the energy consumption of the DC brushless fan, and the energy consumption metering device T2 uses a TKD-S800 DC fan coil meter to calculate the power consumption of the DC brushless fan; The state controller adopts electronic monitoring technology and uses a display to display the working state, wind speed of the DC brushless fan, indoor temperature, and set temperature to understand the operating state of the DC brushless fan; The billing system software is used to formulate charging standards and charge fees by comprehensively considering the energy consumption measured by the DC fan coil meter, staff wages, water charges and tax costs; The state controller includes a temperature control module, a humidity control module and a display module; the temperature control module includes a thermistor R1, the thermistor R1 is connected in series with a fixed resistor R3, the fixed resistor R2 is connected in series with a diode D1 and then connected in parallel with the thermistor R1, a filter capacitor C1 is connected in parallel with the thermistor R1, one end of the series-connected thermistor R1 and the fixed resistor is grounded, and one end is connected to a power supply VCC, the end connected to the thermistor is connected to the positive pole of amplifier one, one end of the fixed resistor R4 is grounded and the other end is connected to the negative pole of amplifier one, the output end of the amplifier is respectively connected to the fixed resistor R5 and the fixed resistor R6, the fixed resistor R5 is connected in series with the fixed resistor R4, the fixed resistor R6 is connected to the display module, the positive pole of the comparator is connected to the fixed resistor R6, the negative pole of the comparator is connected to the comparison voltage, one end of the capacitor C2 is connected between the fixed resistor R6 and the comparator one, the other end of the capacitor C2 is grounded, and the output end of the comparator is connected to the feedback adjustment device, thus forming a temperature control module for temperature control; The state controller includes a humidity control module including a humidity-sensitive resistor R2, the humidity-sensitive resistor R2 is connected in series with a fixed resistor R1, the other end of the fixed resistor R1 is connected to a power supply VCC, the fixed resistor R3, the fixed resistor R4 and the fixed resistor R5 are connected in series, the negative pole of the comparator 1 is connected between the fixed resistor R1 and the photoresistor R2, the positive pole of the comparator 1 is connected between the fixed resistor R3 and the fixed resistor R4, the negative pole of the comparator 1 is connected to the positive pole of the comparator 2, the negative pole of the comparator 2 is connected between the fixed resistor R4 and the fixed resistor R5, one end of the fixed resistor R5 is connected to the fixed resistor R4, and the other end is grounded, the output end of the comparator 1 is connected to the fixed resistor R6, and the other end is connected to the feedback adjustment device, and one end of the fixed resistor R7 is connected to the output end of the comparator 2, and the other end is connected to the feedback adjustment device; The state controller has a display module, which is used to display the working state, the wind speed of the brushless DC fan, the indoor temperature, and the set temperature. The working state displays the working mode of the brushless DC fan, and the working modes include cooling, heating, humidification, and drying. The display module has an adjustment button, which is used to adjust the working mode, set temperature, and wind speed of the brushless DC fan; The state controller monitors the temperature signal and the humidity signal through the temperature and humidity sensor chip. The temperature and humidity sensor chip SHT2x is composed of a clock pin SCL, a data pin SDA, a ground pin VSS, a power pin VDD and a non-connection pin NC. The data pin SDA is connected to the IO port of the MCU, and then connected to the pull-up resistor R1, R1 is then connected to the power supply VDD, the power supply pin VDD is directly connected to the power supply VDD, the ground pin VSS is directly grounded, an isolation capacitor C is connected between the ground pin VSS and the power supply pin VDD, the IO2 port of the MCU is connected to a pull-up resistor R2, and the pull-up resistor R2 is then connected to the power supply VDD. The two non-connection pins NC of the temperature and humidity sensor chip SHT2x are suspended and not connected, forming a temperature and humidity control module and a humidity control module; The state controller transmits the state information to the display module for display through UTC-I2C wireless communication, the GPIO port of the MCU is connected to the SET_A pin of the UTC, the sending signal pin TXD and the receiving signal pin RXD of the MCU are correspondingly connected to the receiving signal pin RXD and the sending signal pin TXD of the UTC, the EXTRNT pin of the MCU is connected to the AUX channel pin of the UTC, the GPIO port of the MCU is connected to the SET_B pin of the UTC, the power pin VCC is connected to the power supply, and the ground pin GND is grounded.

2. The DC brushless fan coil air conditioner charging metering system according to claim 1 is characterized in that: The data collector T1 is connected to the energy consumption metering device T2 via RS485 bus. The RS485 bus connection adopts single-point grounding, and a single shielded wire is grounded. The data collector T1 is connected in series with the energy consumption metering device T2a, the energy consumption metering device T2b and the energy consumption metering device T2x via RS485 bus.

3. The DC brushless fan coil air conditioner charging metering system according to claim 1 is characterized in that: The data collector T1 is connected to the computer via Ethernet, the computer terminal is connected to the wireless network, and the power consumption information of the DC brushless fan is transmitted between the computer terminal and the data collector T1 via Ethernet, and the Ethernet is connected via RJ45 interface communication.

4. The DC brushless fan coil air conditioner charging metering system according to claim 3 is characterized in that: The energy consumption metering device T2 is connected in series in the power supply circuit of the DC brushless fan coil. The DC brushless fan is mainly composed of three parts: a motor body, a Hall position sensor and an electronic switch circuit. The stator and the rotor constitute the motor body. The stator winding is divided into three phases A, B, and C. The phase difference between each phase is 120° and a star connection is adopted. Transistors Q1, Q2 and Q3 are respectively used as power switches of the three-phase windings A, B, and C, and are respectively connected to the corresponding power switch devices in the electronic switch circuit. The rotor consists of two poles: a magnetic pole N and a magnetic pole S.

5. The DC brushless fan coil air conditioner charging metering system according to claim 1 is characterized in that: The billing system software is located on the computer terminal. The billing system software is used to calculate the air conditioning fee for each coil. The method is to run the billing system software on the computer, input the maintenance and repair hours and costs, water charges, and tax cost coefficients of the staff into the billing system software, and then input the energy consumption measured by the DC fan coil meter into the billing system software to convert the cooling or heating fees to obtain the charges.

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