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CN-224233849-U - Air conditioner data acquisition and remote uploading device

CN224233849UCN 224233849 UCN224233849 UCN 224233849UCN-224233849-U

Abstract

The utility model discloses an air conditioner data acquisition and remote uploading device which is applied to an air conditioner data communication system. The device integration OpenCPU architecture comprises a main control chip U2A and an NB_Module Module U2B, data acquisition, protocol analysis and wireless communication are cooperatively realized, networking, fault and upgrading states are fed back in real time through a double-color LED, a power management circuit adopts a DC-DC and LDO combination to support 10-20V wide-voltage input and stable output of 3.6V power supply, a UART level conversion circuit realizes 5V and 3.6V bidirectional level matching through a MOS tube and a triode, communication compatibility is ensured, a SIM card circuit integrates TVS protection and self-adaptive power supply, a multi-voltage SIM card is supported, and a hardware and software watchdog double-monitoring mechanism prevents system deadlock. The scheme solves the problems of complex hardware, low data processing and transmission integrity, obvious reliability and intelligence deficiency of the traditional technology, and has the advantages of low power consumption, high reliability, low cost and easy maintenance.

Inventors

  • LUO YUNLONG
  • ZHENG JINGYAN
  • ZHU BILIANG
  • JIAO SHAOHUA
  • DONG DAPENG
  • WANG LUKE

Assignees

  • 浙江利尔达物联网技术有限公司

Dates

Publication Date
20260512
Application Date
20250429

Claims (10)

  1. 1. The air conditioner data acquisition and remote uploading device is applied to an air conditioner data communication system and is characterized by comprising an integrated OpenCPU architecture, an NB-IOT module circuit, a power management circuit, an SIM card circuit and a hardware watchdog circuit, wherein the NB-IOT module circuit is connected with the power management circuit and an LED indication circuit and is also connected with the SIM card circuit and the hardware watchdog circuit, the power management circuit comprises a DC-DC conversion circuit and an LDO conversion circuit and is connected with the NB-IOT module circuit and a power input port, the power input port is also connected with a UART level conversion circuit, and the UART level conversion circuit is connected to the NB-IOT module circuit.
  2. 2. The device for collecting and remotely uploading air-conditioning data according to claim 1, wherein the core elements of the NB-IOT Module circuit mainly comprise a main control chip U2A and an nb_module Module U2B, and further comprise an external memory chip MX25, wherein the nb_module Module U2B is connected to the external memory chip MX25 through an SPI interface, and is mainly responsible for wireless communication of the modules.
  3. 3. The air conditioner data acquisition and remote uploading device according to claim 2, wherein the main control chip U2A is connected with an antenna interface and a UART level conversion circuit, the SIM card circuit and a hardware watchdog circuit are further connected with a power management circuit and an external storage circuit, the antenna interface is connected with an antenna matching circuit through an RF_ANT pin of the main control chip U2A, radio frequency signal transmission is optimized, the antenna matching circuit is composed of a resistor R19, a capacitor C23 and a capacitor C24, low-pass filtering is conducted, high-frequency noise is restrained, the UART level conversion circuit is connected to the main control chip U2A through four pins of an NB_TEST transceiver interface and an NB transceiver interface, the SIM card circuit is connected to the main control chip U2A through an SIM interface, the hardware watchdog circuit is connected to the main control chip U2A through an NB_RST pin, the power management circuit is used for supplying power to an NB-IOT module circuit, an SIM card and an LED after converting input voltage to 3.6V, and is connected to a power pin of the main control chip U2A, and the external storage circuit core element is an external storage chip MX25, and the external storage circuit supports reading of the memory chip and the memory chip VDD is connected to the main control chip U2A through an interface.
  4. 4. The air conditioner data acquisition and remote uploading device according to claim 1 or 3, wherein the power management circuit provides a stable power supply for an NB-IOT module and a peripheral circuit to prevent equipment damage caused by voltage fluctuation, the air conditioner data acquisition and remote uploading device comprises a DC-DC conversion circuit and an LDO conversion circuit, the DC-DC conversion circuit is connected with a power input port, wide voltage of DCIN 10V-20V is input, 5V voltage is output after the wide voltage is converted by the DC-DC conversion circuit, the output end of the wide voltage is connected with the input end of the LDO conversion circuit, the LDO conversion circuit mainly comprises an LDO voltage stabilizing chip U1, the output end of the LDO voltage stabilizing chip U1 is connected with a power pin of the NB-IOT module circuit, and the LDO voltage stabilizing chip U1 is responsible for reducing 5V voltage output by the DC-DC conversion circuit to 3.6V.
  5. 5. The air conditioner data acquisition and remote uploading device according to claim 1 or 2, wherein the UART level conversion circuit is responsible for solving the problem of communication compatibility between a supply voltage 5V of a main control chip U2A and a supply voltage 3.6V of an nb_module U2B in an NB-IOT Module circuit, and comprises core element N channel MOS transistors Q1 and Q2, and further comprises NPN transistors Q3 and Q4, wherein a drain D of the MOS transistor Q1 is connected to a 5V end output by a DC-DC conversion circuit through a resistor R3, a gate G is grounded, a source S is connected to an nb_rx interface of a main control chip U2A of the NB-IOT Module circuit, a drain D of the MOS transistor Q2 is connected to a 5V end output by the DC-DC conversion circuit through a resistor R4, the gate G is grounded, the source S is connected to an nb_tx interface of the main control chip U2A of the NB-IOT Module circuit, a B end pin of the NPN transistor Q3 is connected to a terminal pin on a low voltage side nb_iot Module circuit, a terminal pin on the main control chip U2A is connected to a terminal on the high voltage side nb_iot 2A pin, and a terminal on the high voltage side of the nb_iot Module circuit is connected to a terminal pin on the nb_terminal 5 b_terminal of the nb_iot2, and the terminal on the terminal is connected to a terminal on the high voltage side of the terminal of the nb_terminal is connected to a terminal 5.
  6. 6. The air conditioner data acquisition and remote uploading device according to claim 1 is characterized in that the LED indicating circuit comprises two double-color LED indicating lamps, a green lamp D6 and a red lamp D7 are respectively connected to GPIO pins NB_LE1 and NB_LE2 of a main control chip U2A of the NB-IOT module circuit through current limiting resistors R7 and R8, multidimensional information is transmitted through different colors and flashing modes, the working state of a module is visually displayed, the green lamp D6 indicates the networking state of equipment, normal data transmission or normal system operation, the red lamp D7 indicates the abnormal state, the green lamp is normally on and idle, the green lamp is slowly flashing to indicate that the equipment is on line, the red lamp is fast flashing to indicate that serious fault alarm is performed during upgrading, and the green lamp is normally on.
  7. 7. The air conditioner data acquisition and remote uploading device according to claim 1 or 3 is characterized in that the SIM card circuit is connected to a main control chip U2A through four SIM pins and mainly comprises a SIM card holder J4 and a telecom MFF2 chip U3, wherein the SIM card holder J4 adopts a NANO SIM card holder to support hot plug, comprises 6 pins, a surface-mounted transient voltage suppression diode D11 is connected in parallel between VCC and GND pins and is close to the layout of the SIM card holder J4, a protection path is shortened, the input side of the telecom MFF2 chip U3 is connected with four SIM pins of a NB-IOT module circuit main control chip U2A, the output side of the telecom MFF2 chip U3 is connected with corresponding pins of the SIM card holder J4, and the SIM card is decoupled through filter capacitors C5-C8 and mainly used for converting 3.6V signals output by the main control chip U2A into voltages supported by the SIM card, and preventing the SIM card from being damaged by overvoltage.
  8. 8. The device for collecting and remotely uploading air-conditioning data according to claim 7, wherein the SIM pins comprise an SIM_DIO pin and an SIM_CLK pin, and further comprise an SIM_RST pin and an SIM_VDD pin, wherein the SIM_DIO pin is directly connected to an IO pin of an SIM card holder J4 and used for transmitting APDU instructions and responses, the SIM_CLK pin outputs a clock signal to the CLK pin of the SIM card holder J4, the frequency range is 1-5MHz, the data transmission time sequence is synchronized, the SIM_RST pin outputs a reset pulse to the RST pin of the SIM card holder J4 and used for initializing an SIM card or forcing a restart, and the SIM_VDD pin provides 3.6V power to the VCC pin of the SIM card holder J4 and supports 1.8V, 3V and 5V power self-adaption.
  9. 9. The air conditioner data acquisition and remote uploading device according to claim 2 is characterized in that a hardware watchdog circuit connected with a main control chip U2A is a timer circuit, a reset pin NB_RST is connected to a system reset end of the NB-IoT Module circuit through a pull-up resistor R14, a program clears the timer within a certain time range and is responsible for monitoring the running state of the system, when the program works normally, the timer does not overflow, a reset signal is not generated, if the program is overtime, the reset is triggered and restarted, the program is prevented from being overtime, the hardware watchdog circuit is started immediately when the system is powered on, works independently of a main processor of the system, is not affected by software faults and cannot be closed or bypassed through software, the monitoring mechanism is always effective, the NB_Module Module U2B is provided with a software watchdog, whether a system task is normally executed through software configuration timing period is detected periodically, a timer is written in through initialization of the program, the timer is enabled, the program is set to a timer is set on time, a special initial value or reset is reset, the program is set on time, a special timer is reset, a network alarm timer is not completed, a network alarm timer is triggered and the abnormal state is recorded, and the network alarm is automatically is closed when the program is not set.
  10. 10. The air-conditioning data acquisition and remote uploading device according to claim 1, wherein the air-conditioning data acquisition and remote uploading device is connected with an air-conditioning interface circuit to directly operate without cooperation of an external single chip microcomputer.

Description

Air conditioner data acquisition and remote uploading device Technical Field The utility model relates to the technical field of air conditioner control and communication, in particular to an air conditioner data acquisition and remote uploading device. Background Along with the continuous development of the internet of things technology, the number of intelligent devices of the internet of things is exponentially increased, and a remote data monitoring system combining air conditioning equipment data with the internet of things technology is generated. The remote data acquisition and uploading technology of the traditional air conditioning equipment mainly depends on Wi-Fi, lora, 4G/5G and other communication modes. In recent years, NB-IoT (narrowband internet of things) technology is gradually rising due to its low power consumption, wide coverage, massive connectivity and low cost characteristics, which makes use of existing cellular network infrastructure to enable remote data transmission without additional gateways, especially for remote or hard-to-route areas. The existing air-conditioning data acquisition and remote uploading technical method generally comprises the following steps of connecting air-conditioning equipment through a Wi-Fi or Bluetooth module, uploading data to a local router or gateway, transmitting the data to a cloud end through the Internet, and adopting a Lora+ concentrator mode, wherein the Lora module is responsible for acquiring air-conditioning data, transmitting the air-conditioning data to a nearest concentrator through a Lora wireless signal, transmitting the data to a central monitoring system of an air-conditioning manufacturer through a wired or wireless network through the concentrator, directly connecting the data to a public network through a 4G/5G module to realize direct data transmission to the cloud end, and adopting a separated architecture of an NB-IoT module and an external single chip microcomputer, wherein the single chip microcomputer is responsible for protocol analysis, data caching and communication control, and the NB-IOT module is only responsible for basic communication functions. Although the technology has advantages, the technology has obvious defects in the aspects of data processing and transmission integrity, reliability and intellectualization that Wi-Fi or Bluetooth modes are required to be distributed in Wi-Fi networks, remote areas or network coverage areas are not available, the energy consumption of air conditioning equipment is improved due to continuous operation of modules, concentrators are required to be additionally arranged in Lora+ concentrator modes, wiring and maintenance cost is increased, loRa penetrating capacity is weak, signals of a multi-obstacle environment (such as a high-rise building) are easy to attenuate, the unit price of a 4G/5G mode module is high, flow cost is continuously consumed, the energy consumption of equipment is improved due to continuous maintenance of 4G connection, the hardware complexity of a singlechip +NB-IOT module mode is high, the double-chip collaborative development period is long, the development cost is high, firmware upgrading requires full OTA, the bandwidth resources of NB-IOT are occupied by upgrading, and the maintenance is difficult. The Chinese patent document CN213421397U discloses a OpenCPU scheme-based 4G shared air conditioner control module, which comprises a 4G module and a Bluetooth module, wherein the 4G module and the Bluetooth module are connected with an air conditioner base plate, the 4G module is respectively connected with an e-SIM card/card seat, a 4G antenna interface, a USB interface and an indicator lamp, openCPU is adopted to effectively reduce the whole equipment cost and improve the safety of data interaction, the low delay of 4G communication well improves the use experience of a user, and simultaneously, a Bluetooth data channel is started in an area with abnormal network coverage effect. The technical scheme still needs to cooperate with the external 4G module, the Bluetooth module and other off-chip single-chip computers through OpenCPU scheme, and has high hardware complexity and high development and maintenance cost. Disclosure of Invention The utility model aims to provide an air conditioner data acquisition and remote uploading device which is applied to an air conditioner data communication system, solves the problems of high hardware complexity, data loss caused by network congestion, unsafe firmware upgrading, short storage life and the like in the traditional scheme through a hardware integrated architecture and a multistage transmission reliability mechanism, realizes low power consumption, high reliability, easy maintenance and high safety of the air conditioner data communication system, and fills the defects of the prior art. The integrated OpenCPU-V power supply system comprises a power management circuit, a UART level conversion circuit, a SIM car