WO2022184182A1 - Procédé de communication pour climatiseur permettant un changement automatique de canal de communication sans fil - Google Patents

Procédé de communication pour climatiseur permettant un changement automatique de canal de communication sans fil Download PDF

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Publication number
WO2022184182A1
WO2022184182A1 PCT/CN2022/083058 CN2022083058W WO2022184182A1 WO 2022184182 A1 WO2022184182 A1 WO 2022184182A1 CN 2022083058 W CN2022083058 W CN 2022083058W WO 2022184182 A1 WO2022184182 A1 WO 2022184182A1
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WIPO (PCT)
Prior art keywords
outdoor unit
communication
communication channel
wireless communication
bit error
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PCT/CN2022/083058
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English (en)
Chinese (zh)
Inventor
程绍江
禚百田
高玉辉
时斌
Original Assignee
青岛海尔空调电子有限公司
青岛海尔空调器有限总公司
海尔智家股份有限公司
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Publication of WO2022184182A1 publication Critical patent/WO2022184182A1/fr

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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the invention belongs to the technical field of air conditioners, and specifically provides an air conditioner communication method capable of autonomously changing wireless communication channels.
  • the transmission of data and control signals between the indoor unit and the outdoor unit mainly adopts wired methods such as strong current communication, HomeBus communication, and RS485 communication. These methods require the installation of a large number of communication wires, which not only costs high hardware, but also Manual installation is required.
  • the wireless communication method only needs to install wireless communication modules in the indoor unit and the outdoor unit respectively, and realize the transmission and exchange of data and control commands through wireless connection. Because no cables are used, the tedious wiring can be saved. and cost, and the installation structure can be simpler and more beautiful.
  • the wireless connection and communication between the outdoor unit and the indoor unit of the air conditioner, the current mass production method is mainly Zigbee.
  • Zigbee used to be called “HomeRF Lite" and “FireFly” technology, and now it is called Zigbee technology. It is mainly used for short distances. , data transmission between various electronic devices with low power consumption and low transmission rate, as well as typical applications with periodic data, intermittent data and low response time data transmission.
  • the communication line between the outdoor unit and the indoor unit can be eliminated, and the Zigbee module can be directly used for data transmission, which greatly improves the installation efficiency and reduces labor costs.
  • the Zigbee module inevitably involves networking issues. The common practice in the industry is that once the Zigbee module is networked, the PANID/channel and other information parameters are fixed and no longer allowed to be changed. The purpose is to prevent confusion in the networking.
  • Zigbee communication uses the 2.4G frequency band.
  • the probability of users using the 2.4G frequency band is getting higher and higher, and there may be a problem that Wifi users occupy the Zigbee communication channel.
  • the existing Zigbee networking module once the networking is completed, the channel is not allowed to be changed. If there is a problem of Wifi occupying the channel, it cannot be solved automatically. The only way is to re-network. Debugging and networking verification will adversely affect the user experience and easily cause user complaints.
  • Chinese patent application CN106322662A discloses a wireless communication system and communication method for internal and external units of an air conditioner.
  • the air-conditioning system includes an internal and external unit of an air conditioner.
  • Each internal unit of an air conditioner includes an internal unit wireless communication module and an internal unit fault handling module.
  • the external unit fault processing module controls the external unit wireless communication module to clear the air conditioner operation data in its own EEPROM after receiving the communication fault notification;
  • the unit fault handling module controls the connected indoor unit wireless communication module to clear the air conditioner operating data in its own EEPROM;
  • the outdoor unit of the air conditioner and all the indoor units of the air conditioner in the same system form a channel.
  • the air conditioner outdoor unit controls the wireless communication module of the outdoor unit to clear the running data in its own EEPROM, so that the wireless communication modules of all the indoor units in the same system are in the same system.
  • the wireless communication module of the external unit controls to clear the air conditioner operation data in its own EEPROM, and then re-establish the channel for the air conditioner external unit and all the air conditioner internal units in the same system. That is to say, the solution of CN106322662A is to re-organize the network after a communication failure occurs. Although this solution does not require manual operation by after-sales personnel, it will still affect the user experience.
  • the first aspect of the present invention provides a An air conditioner communication method capable of autonomously changing wireless communication channels, the air conditioner includes an outdoor unit and an indoor unit, wherein the method includes the following steps: detecting a communication bit error rate between the outdoor unit and the indoor unit; The communication error rate is compared with a set threshold; if the communication error rate is greater than the set threshold, the outdoor unit switches from the current communication channel to the new communication channel, wherein the The communication quality is better than the current communication channel; the indoor unit is connected to the outdoor unit in the new communication channel.
  • the method further includes: before switching from the current communication channel to the new communication channel, the outdoor unit sends a communication channel switching notification to the indoor unit And confirm whether the response from the indoor unit is received.
  • the method further includes: after receiving the response from the indoor unit and before switching from the current communication channel to the new communication channel, the outdoor unit Command the indoor unit to shut down.
  • the step of "connecting the indoor unit to the outdoor unit in the new communication channel” specifically includes: the indoor unit communicates with the outdoor unit to the outdoor unit.
  • the outdoor unit compares the ID information in the connection request with the pre-stored legal ID information; when the ID information in the connection request When matching with at least one of the pre-stored legal ID information, the outdoor unit accepts the connection request of the indoor unit.
  • the air conditioner is a multi-line air conditioner
  • the multi-line air conditioner includes an outdoor unit and a plurality of indoor units, the outdoor unit and each indoor unit
  • a wireless communication module is installed on the machine;
  • the step of "detecting the communication bit error rate between the outdoor unit and the indoor unit” specifically includes: detecting the difference between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit
  • the step of "compare the communication error rate with the set threshold” specifically includes: calculating the communication error rate between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit The average value of the communication bit error rate is compared with the set threshold value.
  • the air conditioner is a multi-line air conditioner
  • the multi-line air conditioner includes an outdoor unit and a plurality of indoor units, the outdoor unit and each indoor unit
  • a wireless communication module is installed on the machine;
  • the step of "detecting the communication bit error rate between the outdoor unit and the indoor unit” specifically includes: detecting the difference between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit
  • the step of "comparing the communication bit error rate with a set threshold” specifically includes: comparing multiple communication between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit The bit error rate is compared with the set threshold.
  • the method further includes: the outdoor unit determines whether the number of indoor units connected to it in the new communication channel is consistent with the set number; if If yes, command all indoor units to turn on and restore to the state before shutdown; if not, continue to receive new indoor unit connection requests.
  • the present invention provides an air conditioner communication method capable of autonomously changing wireless communication channels
  • the air conditioner is a multi-line air conditioner and includes an outdoor unit and a plurality of indoor units
  • the outdoor unit and each indoor unit are A wireless communication module
  • the method includes the following steps: detecting the communication bit error rate between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit; calculating the wireless communication module on the outdoor unit The average value of the communication bit error rate between the communication module and the wireless communication module on each indoor unit; compare the average value of the communication bit error rate with the set threshold; if the average value of the communication bit error rate is greater than The set threshold value and the duration exceeds the preset time, the outdoor unit sends a communication channel switching notification to all indoor units and confirms whether it has received the response of each indoor unit; The outdoor unit commands all indoor units to shut down; the outdoor unit switches from the current communication channel to a new communication channel, wherein the communication quality of the new communication channel is better than that of the current communication channel; The unit sends a connection
  • the outdoor unit when it is detected that the bit error rate is too high, the outdoor unit automatically switches to a channel with better communication quality after notifying the indoor unit, and then the indoor unit starts a new communication Connecting to the outdoor unit on the channel requires neither downtime nor manual intervention, and will not cause any adverse impact on the user experience.
  • FIG. 1 is a flow chart of the main steps of an air conditioner communication method capable of autonomously changing wireless communication channels according to the present invention.
  • FIG. 2 is a detailed flow chart of the steps of the air conditioner communication method capable of autonomously changing wireless communication channels of the present invention described in conjunction with the multi-connection.
  • FIG. 1 is a flow chart of main steps of an air conditioner communication method capable of autonomously changing wireless communication channels of the present invention.
  • the air conditioner communication method capable of autonomously changing wireless communication channels of the present invention includes the following steps: S1, detecting the communication bit error rate between the outdoor unit and the indoor unit; S2, comparing the communication bit error rate with a set threshold ; S3, if the communication bit error rate is greater than the set threshold, the outdoor unit switches from the current communication channel to the new communication channel, wherein the communication quality of the new communication channel is better than the current communication channel; S4, the indoor unit is in the new communication channel. connected to the outdoor unit.
  • the method further includes: before switching from the current communication channel to the new communication channel, the outdoor unit sends a communication channel switching notification to the indoor unit and confirms whether a response from the indoor unit is received. More preferably, the method further comprises: after receiving the response from the indoor unit and before switching from the current communication channel to the new communication channel, the outdoor unit instructs the indoor unit to shut down.
  • the detection of the communication bit error rate between the outdoor unit and the indoor unit in the above step S1 can be performed in various ways, which are well known in the art and will not be repeated here.
  • the number of communication errors between the outdoor unit and the indoor unit can be counted, and the corresponding communication bit error rate can be calculated on this basis.
  • the "communication error rate" in this application should be understood in a broad sense, which includes not only conventional communication errors, but also various other abnormal communication situations, such as, but not limited to, outdoor units.
  • the control command sent to the indoor unit does not get the response from the indoor unit in time, the outdoor unit cannot get the status update information fed back by the indoor unit in time, and so on.
  • the set threshold can be set by technicians according to the model and application scenario, and its size can accurately reflect the occupied channel, and try to avoid identifying the regular wireless signal fluctuation as the channel occupied.
  • the set threshold may take a value in the range of 50%-80%.
  • the above steps S1 and S2 are usually performed by the outdoor unit, that is, the set threshold is stored on the outdoor unit, and the outdoor unit counts the frequency of communication errors between the outdoor unit and the indoor unit and compares the value with all The set thresholds are compared.
  • the above steps S1 and S2 can also be performed by other subjects.
  • the set threshold may be stored on a cloud server, and step S2 may be performed by the cloud server. This adjustment to the executive body does not change the principle of the present invention, and therefore will also fall within the protection scope of the present invention.
  • step S3 if the detected communication bit error rate is greater than the set threshold, it indicates that the current wireless communication channel between the indoor unit and the outdoor unit is occupied.
  • the outdoor unit or the cloud server sends a notification to the indoor unit to inform The indoor unit will switch the communication channel and the frequency band of the new communication channel.
  • the new communication channel it should be pointed out that its communication quality is significantly better than the current communication channel.
  • the outdoor unit can judge the communication quality according to the bandwidth occupancy rate of each communication channel and the signal strength in the channel. the pros and cons. Specifically, the lower the channel occupancy rate, the weaker the signal strength in the channel, and the better the communication quality; otherwise, the lower the communication quality.
  • the indoor unit sends a connection request to the outdoor unit in the new communication channel, and the connection request includes the ID information of the indoor unit; the outdoor unit sends the ID information in the connection request to the outdoor unit.
  • the information is compared with the pre-stored legal ID information; when the ID information in the connection request matches at least one of the pre-stored legal ID information, the outdoor unit accepts the connection request from the indoor unit.
  • the multi-connection of the present invention includes one outdoor unit and multiple indoor units, and a wireless communication module is provided on the outdoor unit and each indoor unit.
  • the step of “detecting the communication bit error rate between the outdoor unit and the indoor unit” in FIG. 1 specifically includes in the case of multiple connections: detecting the communication between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit. bit error rate.
  • the wireless communication modules on the above-mentioned outdoor unit and indoor unit are all Zigbee modules.
  • the multi-line air conditioner described here only includes one outdoor unit, this is not limitative, and the technical solution of the present invention can be applied to a multi-line air conditioner including multiple outdoor units.
  • the wireless communication module on the outdoor unit may specifically refer to the wireless communication module on one of the outdoor units, or may refer to the wireless communication module on any outdoor unit in general, as long as It suffices to be able to perform bit error rate detection and to compare the detected bit error rate with a set threshold.
  • the wireless communication method described here is Zigbee, this is not limiting. Without changing the principle of the present invention, those skilled in the art can also apply it to other wireless communication air conditioners as required. Changes to the wireless communication method do not deviate from the basic principles of the present invention, and therefore fall within the protection scope of the present invention.
  • the multi-connected units are powered on first, and then the Zigbee modules on the outdoor unit and the indoor unit are networked with each other.
  • the networking manner here may be any known wireless networking manner, which will not be described in detail.
  • the outdoor unit determines whether the detected communication bit error rate is higher than the set threshold (N%) and whether the duration of this state exceeds the preset time T1. If not, the Zigbee module on the outdoor unit and the indoor unit is currently continue to communicate under the channel. If the answer is yes, the outdoor unit enters the mode of actively changing the communication channel.
  • the above judgment can be performed in the following ways: detecting the communication bit error rate between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit; calculating the relationship between the wireless communication module on the outdoor unit and each indoor unit The average value of the communication bit error rate between the wireless communication modules on the indoor unit; the average value of the communication bit error rate is compared with the set threshold. Correspondingly, if the average value of the communication bit error rate is greater than the set threshold and the duration exceeds a preset time, the outdoor unit enters a mode of actively changing the communication channel.
  • the above judgment can also be performed in the following manner: detecting the communication bit error rate between the wireless communication module on the outdoor unit and the wireless communication module on each indoor unit; The multiple communication bit error rates between the wireless communication modules on each indoor unit are compared with the set threshold; if the ratio of the multiple communication bit error rates greater than the set threshold reaches the set ratio and continues When the time exceeds the preset time, the outdoor unit enters the mode of actively changing the communication channel.
  • the above-mentioned setting ratio and setting time can be flexibly set by technicians according to specific application scenarios. For example, if the communication bit error rate of 7 out of 10 indoor units exceeds the set threshold and the duration exceeds 30 minutes, it is determined that the current communication channel is occupied, and the outdoor unit enters the mode of actively changing the communication channel.
  • the outdoor unit after entering the mode of actively changing the communication channel, the outdoor unit sends a notification of changing the communication channel to all indoor units, and judges whether it has received a response notification from all indoor units, if not, it will continue to cycle until all indoor units are received. The answer from the indoor unit. After receiving the responses from all indoor units, the outdoor unit forces all indoor units to turn off, so as to minimize the number of communications and improve the efficiency of channel change. After confirming that all indoor units are turned off, the outdoor unit changes to the new communication channel (N1 channel) and sends a notification that it has changed to the new communication channel, then the outdoor unit switches to the monitoring state and starts to receive the indoor unit's signal in the new communication channel.
  • N1 channel new communication channel
  • connection request wherein the connection request includes the PANID information of the corresponding indoor unit.
  • the outdoor unit determines whether the PANID information in the connection request is consistent with that stored in the outdoor unit, if not, rejects the request of the indoor unit, and if it is consistent, allows the indoor unit to join . Finally, the outdoor unit determines whether the number of indoor units reconnected in the new communication channel is consistent with the set value. If not, it continues to receive a new indoor unit connection request. If it is consistent, it is determined that the channel change is successful, and the outdoor unit commands all indoor units. Reboot and restore to the state before the shutdown. At this point, the entire channel automatic switching process is over.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
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Abstract

La présente invention concerne le domaine technique des climatiseurs, et concerne spécifiquement un procédé de communication pour climatiseur permettant un changement automatique d'un canal de communication sans fil, qui vise à résoudre le problème d'un taux d'erreur sur les bits excessivement élevé pendant des communications sans fil entre des unités extérieures et des unités intérieures de climatiseurs existants provoqué par des canaux qui sont occupés. Dans ce but, le procédé selon la présente invention consiste à : mesurer un taux d'erreur sur les bits de communication entre une unité extérieure et une unité intérieure ; comparer le taux d'erreur sur les bits de communication à un seuil établi ; si le taux d'erreur sur les bits de communication est supérieur au seuil établi, commuter l'unité extérieure d'un canal de communication courant à un nouveau canal de communication, la qualité de communication du nouveau canal de communication étant supérieure à celle du canal de communication courant ; et relier l'unité intérieure à l'unité extérieure sur le nouveau canal de communication. Selon le procédé de la présente invention, lorsqu'il est détecté que le taux d'erreur sur les bits est trop élevé, l'unité extérieure est automatiquement commutée vers un canal ayant une meilleure qualité de communication, puis l'unité intérieure est reliée à l'unité extérieure sur un nouveau canal de communication, sans interruption ni intervention manuelle, empêchant ainsi un effet négatif sur le ressenti utilisateur.
PCT/CN2022/083058 2021-03-01 2022-03-25 Procédé de communication pour climatiseur permettant un changement automatique de canal de communication sans fil WO2022184182A1 (fr)

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CN202110226648.0A CN112944569A (zh) 2021-03-01 2021-03-01 能自主变更无线通讯频道的空调通讯方法

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CN119815451A (zh) * 2025-03-14 2025-04-11 深圳市凯仕德科技有限公司 通讯方法、离子棒、红外设备及电子设备

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CN112944569A (zh) * 2021-03-01 2021-06-11 青岛海尔空调电子有限公司 能自主变更无线通讯频道的空调通讯方法

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WO2006058459A1 (fr) * 2004-12-01 2006-06-08 Zte Corporation Dispositif de reception optique adaptatif et procede associe
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