WO2019007376A1 - Air conditioner defrosting control method - Google Patents

Air conditioner defrosting control method Download PDF

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Publication number
WO2019007376A1
WO2019007376A1 PCT/CN2018/094541 CN2018094541W WO2019007376A1 WO 2019007376 A1 WO2019007376 A1 WO 2019007376A1 CN 2018094541 W CN2018094541 W CN 2018094541W WO 2019007376 A1 WO2019007376 A1 WO 2019007376A1
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Prior art keywords
air conditioner
time
mode
average temperature
heating mode
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PCT/CN2018/094541
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French (fr)
Chinese (zh)
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刘超超
王彦生
曾福祥
姜全超
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青岛海尔空调器有限总公司
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Publication of WO2019007376A1 publication Critical patent/WO2019007376A1/en

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles

Definitions

  • the invention relates to a method for controlling an air conditioner, and in particular to a method for controlling a defrosting of an air conditioner.
  • the air conditioner When the air conditioner is in heating operation, if the outdoor ambient temperature is below the freezing point and the air has a certain humidity, the surface of the outdoor heat exchanger is likely to freeze and form frost, and the presence of the frost will affect the heating performance of the air conditioner. Therefore, during the air conditioning heating process, it is necessary to enter the defrost mode for defrosting at intervals.
  • the defrosting trigger condition of the air conditioner greatly affects the defrosting effect, heating performance and comfort of the air conditioner.
  • the defrosting precision of the existing air conditioner is not high, and improper setting of the defrosting mode may seriously affect the heating effect, which brings inconvenience to the user's use.
  • a further object of the invention is to improve the defrosting accuracy of an air conditioner.
  • Another further object of the invention is to enhance the heating effect of the air conditioner.
  • the present invention provides a control method for an air conditioner defrosting, the air conditioner having a heating mode and a defrosting mode activated when the air conditioner operates in the heating mode to satisfy a preset trigger condition
  • the control Methods include:
  • the air conditioner switches from the heating mode to the defrost mode, and counts that the air conditioner is turned on from the current heating mode to the defrosting The time of the mode, this time is called the heating mode time Sy;
  • a dynamic trigger condition for the air conditioner to enter the defrost mode next time is determined according to the coil temperature, the heating mode time Sy, and the defrost mode time Sc.
  • the coil temperature includes:
  • the total average temperature Ty of the coil in the heating mode time Sy operating in the heating mode and the air conditioner switching from the heating mode to the said when operating in the heating mode The average temperature Ts of the coil at the second preset time before the defrost mode;
  • the real-time temperature T of the coil is detected once every first preset time interval.
  • the second preset time is 1 minute
  • the first preset time is any value between 5 and 15 seconds.
  • control method further includes:
  • the calibration average temperature Tp of the coil is calculated based on the total average temperature Ty and the final average temperature Ts, and the magnitudes of the final average temperature Ts and the calibration average temperature Tp are compared.
  • d is a temperature compensation value
  • the temperature compensation value is an arbitrary integer between -1 and 2.
  • control method further includes:
  • the dynamic trigger condition that the air conditioner enters the defrost mode next time is set as the preset trigger condition.
  • control method further includes:
  • the dynamic trigger condition of the air conditioner entering the defrost mode next time is set to the real-time temperature T of the coil to reach the calibration. Average temperature Tp.
  • control method further includes:
  • the dynamic trigger condition of the next time the air conditioner enters the defrost mode is set to be that the preset trigger condition is satisfied after the air conditioner is extended.
  • the heating mode reaches a third preset time Sa; wherein
  • the air conditioner immediately enters the next time Defrost mode.
  • the third preset time S a is determined according to the final average temperature T s and the magnitude of the calibration average temperature Tp.
  • c is the calibration coefficient
  • Sa is the value in minutes
  • Ts and Tp are the values in degrees Celsius.
  • the control method of the present invention can detect the triggering condition of the defrost mode in the next working cycle in real time by detecting the coil temperature in the working cycle composed of the heating mode and the defrost mode and the running time of each mode.
  • the adjustment is made such that when the air conditioner changes its properties such as ambient temperature and/or humidity, it can be defrosted at the most suitable timing, thereby optimizing the defrosting effect.
  • control method of the present invention can enable the air conditioner to operate the defrosting mode in time when the heating mode is not effective, and prolong the heating mode running time when the heating effect is good, thereby obtaining the defrosting time in a shorter defrosting time.
  • FIG. 1 is a schematic flow chart of a control method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a control method according to another embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a control method for detecting coil temperature according to still another embodiment of the present invention.
  • the control method of the present invention can be used for defrosting a fixed frequency air conditioner.
  • the air conditioner has a heating mode and a defrosting mode that is activated after the air conditioner operates in the heating mode and satisfies the preset trigger condition.
  • control method includes:
  • step S100 the air conditioner enters the heating mode for the nth time.
  • Step S102 detecting the coil temperature of the heat exchanger in the air conditioner.
  • step S104 it is determined whether the air conditioner satisfies the preset trigger condition; if yes, step S106 is performed, and if no, the process returns to step S102.
  • Step S106 the air conditioner enters the defrosting mode for the mth time, obtains the heating mode time Sy for the whole process of running the nth heating mode, and obtains the total average temperature Ty of the coil running the entire process of the nth heating mode, and obtains the operation.
  • step S108 it is determined whether the air conditioner has completed the mth defrost program; if yes, step S110 is performed, and if not, returning to step S106.
  • Step S110 obtaining a defrosting mode time Sc for running the entire process of the mth defrosting mode.
  • step S112 the calibration average temperature Tp is calculated.
  • Step S113 determining a dynamic trigger condition of the m+1th entering the defrosting mode of the air conditioner according to the calibrated average temperature Tp.
  • the air conditioner of step S100 enters the heating mode for the nth time, and specifically may control the air conditioner to enter the heating mode for the nth time.
  • m and n in the above steps may be any integer greater than 0, and m and n may be equal or unequal.
  • the air conditioner performs the first heating mode and the defrost mode.
  • the preset triggering condition may be the default triggering condition of the target air conditioner, for example, temperature control or time control.
  • the preset trigger condition may be the dynamic trigger condition of the last air conditioner entering the defrost mode, that is, It may be a trigger condition when entering the n-1th defrost mode from the m-1th heating mode.
  • the calibration average temperature Tp in the above step S112 is related to the coil temperature, the heating mode time Sy, and the defrosting mode time Sc. That is, the calibration average temperature Tp of the coil is calculated based on the total average temperature Ty and the final average temperature Ts.
  • the formula for calculating the calibrated average temperature Tp is:
  • d is the temperature compensation value
  • the temperature compensation value is a value in degrees Celsius, and may be any integer between -1 and 2.
  • Ts and Tp are values in degrees Celsius.
  • the temperature compensation value can be determined according to the outdoor ambient temperature and humidity.
  • d when the air conditioner is in an area where the outdoor environment humidity is large (for example, the relative humidity of the air is greater than 65%), and the outdoor ambient temperature is between -2 ° C and 4 ° C, d may be set to 2 ( Celsius). That is to say, under such conditions, the frost layer is easily generated on the outdoor unit, and the frost layer is too thick to cause the indoor heating effect to be greatly attenuated. At this time, the heating capacity output in the heating mode will be lower than and will further lower the average heating capacity of the entire cycle, and should be defrost as soon as possible.
  • d When it is in an area where the outdoor environment humidity is small (for example, the relative humidity of the air is less than 50%), and the outdoor ambient temperature is below 0 °C, d can be set to -1 (degrees Celsius). Under such conditions, the outdoor unit is less prone to frost layer formation, and the heat generation attenuation is relatively small at this time, that is, at this time, the heat output of the air conditioner is above the average heating amount, and the heating operation time can be appropriately extended.
  • the outdoor unit is less prone to frost layer formation, and the heat generation attenuation is relatively small at this time, that is, at this time, the heat output of the air conditioner is above the average heating amount, and the heating operation time can be appropriately extended.
  • d can be the default value of 0 (degrees Celsius) or comprehensively set according to further testing and user needs.
  • the control method of the present invention causes the air conditioner to continuously detect the coil temperature of the indoor heat exchanger while it is operating in the heating mode. Continuous detection refers to detecting the real-time temperature T of the coil once every first preset time when the air conditioner is operating in the heating mode.
  • a method for controlling the temperature of the coil includes:
  • step S1010 the air conditioner operates in the heating mode.
  • step S1011 the real-time temperature T of the coil is detected once every first preset time interval.
  • step S1010 may be to control the air conditioner to operate in the heating mode, and step S1010 and step S1011 may be included in steps S100 and S102, respectively.
  • the coil temperature may include the total average temperature Ty of the coil in the air conditioning operation heating mode time Sy and the end average temperature of the coil in the second preset time before the self-heating mode is switched to the defrost mode when the air conditioner operates in the heating mode Ts.
  • the real-time temperature T can be used to calculate the total average temperature Ty and the final average temperature Ts.
  • the heating mode time Sy in step S106 and the defrost mode time Sc in step S110 respectively mean that when the preset triggering condition is satisfied, the air conditioning self-heating mode is switched to the defrost mode, and the air conditioning is counted.
  • the time from the current heating mode to the switching to the defrost mode is referred to as the heating mode time Sy.
  • the time at which the air conditioner operates the defrosting mode is acquired, and this time is referred to as the defrosting mode time Sc.
  • the control method of the present invention can detect the triggering condition of the defrost mode in the next working cycle in real time by detecting the coil temperature in the working cycle composed of the heating mode and the defrost mode and the running time of each mode.
  • the adjustment is made such that when the air conditioner changes its properties such as ambient temperature and/or humidity, it can be defrosted at the most suitable timing, thereby optimizing the defrosting effect.
  • the second predetermined time may be 1 minute.
  • the first preset time may be any value between 5 and 15 seconds. In some preferred embodiments of the present invention, the first preset time may be 10 seconds, whereby the temperature detecting operation does not need to be performed too frequently, and a sufficient number of coil real-time temperature values (T) can be acquired, thereby calculating Accurate total average temperature Ty and end average temperature Ts.
  • control method further includes:
  • step S114 it is determined whether Tp is equal to Ts; if yes, step S116 is performed, and if no, step S118 is performed.
  • Step S116 after the n+1th entry of the air conditioner enters the heating mode, when the preset trigger condition is satisfied, the air conditioner enters the m+1th defrosting mode.
  • step S118 it is determined whether Ts is greater than Tp; if yes, step S122 is performed, and if no, step S120 is performed.
  • step S120 after the n+1th heating mode of the air conditioner enters the heating mode, when the real-time temperature T of the coil reaches Tp, the air conditioner immediately enters the m+1th defrosting mode.
  • Step S122 after the n+1th entry of the air conditioner enters the heating mode, when the preset trigger condition is satisfied, the air conditioner further prolongs the heating mode of the running Sa duration.
  • Step S124 in the process of extending the running Sa time heating mode, detecting whether the real-time temperature T of the coil reaches Tp; if yes, executing step S128; if not, executing step S126.
  • step S126 it is determined whether the air conditioner has extended the running heating mode Sa time; if yes, step S128 is performed, and if not, returning to step S122.
  • step S1208 the m+1th defrosting program is immediately entered.
  • Step S113 in the previous embodiment may include part or all of the contents from step S114 to step S128.
  • the third preset time Sa in step S122 can be determined according to the size of the final average temperature Ts and the calibration average temperature Tp, and the specific calculation formula is:
  • c is a calibration coefficient, and the specific value may be any value between 0.5 and 2.
  • Sa is the value in minutes
  • the calibration coefficient c can be selected and set according to the difference between Ts and Tp.
  • the calibration coefficient c can be set to 1.
  • the calibration factor can be set to 1.5.
  • the present control method sets the dynamic trigger condition for entering the defrosting mode for the next time by comparing the final average temperature Ts with the magnitude of the calibrated average temperature Tp. If the average temperature Ts is equal to the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set as the preset trigger condition. If the average temperature Ts is less than the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set to the real-time temperature T of the coil in the heating mode to reach the calibration average temperature Tp.
  • the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set to the third preset time Sa after the preset trigger condition is satisfied. Further, if the real-time temperature T of the coil of the air conditioner reaches the calibration average temperature Tp within the third preset time Sa of the extended running heating mode, the air conditioner immediately enters the next defrost mode.
  • the control method of the present invention ensures that the maximum average heating capacity is output throughout the heating cycle by finding the optimum defrost point. That is, the control method of the present invention can enable the air conditioner to operate the defrosting mode in time when the heating mode is not effective, and prolong the heating mode running time when the heating effect is good, thereby enabling a shorter defrosting time. Obtain better defrosting effect, greatly improve the heating efficiency of the heating mode after defrosting, prolong the efficient heating time, and obtain the best heating effect, and the control method can improve the user without increasing the hardware cost of the air conditioner. Experience.

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Abstract

An air conditioner defrosting control method. An air conditioner has a heating mode and a defrosting mode, activated if a preset trigger condition is satisfied when the air conditioner operates in the heating mode. The control method comprises: continuously detecting a coil temperature of an indoor heat exchanger (S102) when the air conditioner operates in the heating mode (S100); if the preset trigger condition is satisfied (S104), the air conditioner switching from the heating mode to the defrosting mode, and counting a time duration from activating the heating mode to switching to the defrosting mode in a current instance, the time duration being referred to as a heating mode duration Sy (S106); when the air conditioner finishes defrosting (S108), obtaining a time duration of the operation of the defrosting mode of the current instance, the duration being referred to as a defrosting mode duration Sc (S110); and determining, according to the coil temperature, the heating mode duration Sy, and the defrosting mode duration Sc, a dynamic trigger condition for the air conditioner to enter the defrosting mode in a subsequent instance (S112, S113). The control method adjusts a trigger condition for the subsequent instance the air conditioner enters the defrosting mode, enabling the air conditioner to defrost at the most appropriate time, thereby achieving optimal defrosting.

Description

一种空调除霜的控制方法Air conditioner defrosting control method 技术领域Technical field
本发明涉及空调的控制方法，特别是涉及一种空调除霜的控制方法。The invention relates to a method for controlling an air conditioner, and in particular to a method for controlling a defrosting of an air conditioner.
背景技术Background technique
空调在制热运行时，如果室外环境温度在冰点以下且空气带有一定湿气，在室外机换热器表面容易结冰形成霜，霜的存在会影响空调的制热性能。因此，在空调制热过程中，每隔一段时间需要进入除霜模式进行除霜。空调的除霜触发条件极大地影响着空调的除霜效果，制热性能及使用舒适性。现有空调的除霜精度不高，除霜模式设置不当会严重影响制热效果，为用户的使用带来不便。When the air conditioner is in heating operation, if the outdoor ambient temperature is below the freezing point and the air has a certain humidity, the surface of the outdoor heat exchanger is likely to freeze and form frost, and the presence of the frost will affect the heating performance of the air conditioner. Therefore, during the air conditioning heating process, it is necessary to enter the defrost mode for defrosting at intervals. The defrosting trigger condition of the air conditioner greatly affects the defrosting effect, heating performance and comfort of the air conditioner. The defrosting precision of the existing air conditioner is not high, and improper setting of the defrosting mode may seriously affect the heating effect, which brings inconvenience to the user's use.
发明内容Summary of the invention
本发明的一个目的是要提供一种空调除霜的控制方法。It is an object of the present invention to provide a method of controlling defrosting of an air conditioner.
本发明的一个进一步的目的是要提高空调的除霜精度。A further object of the invention is to improve the defrosting accuracy of an air conditioner.
本发明另一个进一步的目的是要增强空调的制热效果。Another further object of the invention is to enhance the heating effect of the air conditioner.
特别地，本发明提供了一种空调除霜的控制方法，所述空调具有制热模式以及所述空调工作于所述制热模式时满足预设触发条件后启动的除霜模式，所述控制方法包括：In particular, the present invention provides a control method for an air conditioner defrosting, the air conditioner having a heating mode and a defrosting mode activated when the air conditioner operates in the heating mode to satisfy a preset trigger condition, the control Methods include:
在所述空调工作于所述制热模式时，持续检测室内换热器的盘管温度；When the air conditioner operates in the heating mode, continuously detecting the coil temperature of the indoor heat exchanger;
当所述预设触发条件被满足时，所述空调自所述制热模式切换至所述除霜模式，并统计出所述空调自本次所述制热模式开启至切换成所述除霜模式的时间，该时间称为制热模式时间Sy；When the preset trigger condition is satisfied, the air conditioner switches from the heating mode to the defrost mode, and counts that the air conditioner is turned on from the current heating mode to the defrosting The time of the mode, this time is called the heating mode time Sy;
当所述空调结束除霜时，获取所述空调本次运行所述除霜模式的时间，该时间称为除霜模式时间Sc；以及When the air conditioner ends the defrosting, acquiring a time when the air conditioner is currently running the defrosting mode, the time being referred to as a defrosting mode time Sc;
根据所述盘管温度、所述制热模式时间Sy和所述除霜模式时间Sc，确定所述空调下一次进入所述除霜模式的动态触发条件。A dynamic trigger condition for the air conditioner to enter the defrost mode next time is determined according to the coil temperature, the heating mode time Sy, and the defrost mode time Sc.
进一步地，所述盘管温度包括：Further, the coil temperature includes:
所述空调在工作于所述制热模式的所述制热模式时间Sy内盘管的总平均温度Ty和所述空调在工作于所述制热模式时自所述制热模式切换至所述 除霜模式前第二预设时间内盘管的末平均温度Ts；且The total average temperature Ty of the coil in the heating mode time Sy operating in the heating mode and the air conditioner switching from the heating mode to the said when operating in the heating mode The average temperature Ts of the coil at the second preset time before the defrost mode;
当所述空调工作于所述制热模式时，每间隔第一预设时间检测一次所述盘管的实时温度T。When the air conditioner operates in the heating mode, the real-time temperature T of the coil is detected once every first preset time interval.
进一步地，所述第二预设时间为1分钟，所述第一预设时间为5～15秒之间的任意值。Further, the second preset time is 1 minute, and the first preset time is any value between 5 and 15 seconds.
进一步地，所述控制方法还包括：Further, the control method further includes:
根据所述总平均温度Ty和所述末平均温度Ts，计算所述盘管的校准平均温度Tp，并比较所述末平均温度Ts和所述校准平均温度Tp的大小。The calibration average temperature Tp of the coil is calculated based on the total average temperature Ty and the final average temperature Ts, and the magnitudes of the final average temperature Ts and the calibration average temperature Tp are compared.
进一步地，所述校准平均温度Tp的计算公式为：Further, the calculation formula of the calibration average temperature Tp is:
Figure PCTCN2018094541-appb-000001
Figure PCTCN2018094541-appb-000001
其中，d为温度补偿值，所述温度补偿值为-1至2之间的任意整数。Where d is a temperature compensation value, and the temperature compensation value is an arbitrary integer between -1 and 2.
进一步地，所述控制方法还包括：Further, the control method further includes:
若所述末平均温度Ts等于所述校准平均温度Tp，则所述空调下一次进入所述除霜模式的所述动态触发条件设定为所述预设触发条件。If the end average temperature Ts is equal to the calibration average temperature Tp, the dynamic trigger condition that the air conditioner enters the defrost mode next time is set as the preset trigger condition.
进一步地，所述控制方法还包括：Further, the control method further includes:
若所述末平均温度Ts小于所述校准平均温度Tp，则所述空调下一次进入所述除霜模式的所述动态触发条件设定为所述盘管的所述实时温度T达到所述校准平均温度Tp。If the end average temperature Ts is less than the calibration average temperature Tp, the dynamic trigger condition of the air conditioner entering the defrost mode next time is set to the real-time temperature T of the coil to reach the calibration. Average temperature Tp.
进一步地，所述控制方法还包括：Further, the control method further includes:
若所述末平均温度Ts大于所述校准平均温度Tp，则所述空调下一次进入所述除霜模式的所述动态触发条件设定为所述预设触发条件被满足后所述空调延长运行所述制热模式达第三预设时间Sa；其中If the end average temperature Ts is greater than the calibration average temperature Tp, the dynamic trigger condition of the next time the air conditioner enters the defrost mode is set to be that the preset trigger condition is satisfied after the air conditioner is extended. The heating mode reaches a third preset time Sa; wherein
若所述空调的所述盘管的所述实时温度T在延长运行所述制热模式的所述第三预设时间Sa内达到所述校准平均温度Tp，则所述空调立即进入下一次所述除霜模式。If the real-time temperature T of the coil of the air conditioner reaches the calibration average temperature Tp within the third preset time Sa for extending the heating mode, the air conditioner immediately enters the next time Defrost mode.
进一步地，所述第三预设时间S a根据所述末平均温度T s和所述校准平均温度Tp的大小确定。 Further, the third preset time S a is determined according to the final average temperature T s and the magnitude of the calibration average temperature Tp.
进一步地，所述第三预设时间Sa的计算公式为：Further, the calculation formula of the third preset time Sa is:
Sa＝c·(Ts-Tp)Sa=c·(Ts-Tp)
其中，c为校准系数，Sa为以分钟为单位的数值，Ts和Tp为以摄氏度为单位的数值。Where c is the calibration coefficient, Sa is the value in minutes, and Ts and Tp are the values in degrees Celsius.
本发明的控制方法通过检测最近一次的由制热模式和除霜模式共同组成的工作周期内的盘管温度及各模式的运行时间，可实时地对下一次工作周期内除霜模式的触发条件进行调整，从而使得空调在环境温度和/或湿度等属性改变时，能够在最合适的时机进行化霜，进而使得其化霜效果达到最佳。The control method of the present invention can detect the triggering condition of the defrost mode in the next working cycle in real time by detecting the coil temperature in the working cycle composed of the heating mode and the defrost mode and the running time of each mode. The adjustment is made such that when the air conditioner changes its properties such as ambient temperature and/or humidity, it can be defrosted at the most suitable timing, thereby optimizing the defrosting effect.
进一步地，本发明的控制方法可以使空调在制热模式效果不佳时及时运行除霜模式，在制热效果良好时延长制热模式运行时间，由此可以在更短的除霜时间内获得更佳的除霜效果，并大大提升除霜后制热模式的制热效率，获取最佳的制热效果，且本控制方法无需增加空调的硬件成本即可提升用户体验。Further, the control method of the present invention can enable the air conditioner to operate the defrosting mode in time when the heating mode is not effective, and prolong the heating mode running time when the heating effect is good, thereby obtaining the defrosting time in a shorter defrosting time. Better defrosting effect, and greatly improve the heating efficiency of the heating mode after defrost, to obtain the best heating effect, and the control method can improve the user experience without increasing the hardware cost of the air conditioner.
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <
附图说明DRAWINGS
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：Some specific embodiments of the present invention will be described in detail, by way of example, and not limitation, The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:
图1是根据本发明一个实施例的控制方法的示意性流程图；1 is a schematic flow chart of a control method according to an embodiment of the present invention;
图2是根据本发明另一个实施例的控制方法的示意性流程图；2 is a schematic flow chart of a control method according to another embodiment of the present invention;
图3是根据本发明又一个实施例的用于检测盘管温度的控制方法的示意性流程图。3 is a schematic flow chart of a control method for detecting coil temperature according to still another embodiment of the present invention.
具体实施方式Detailed ways
本发明的控制方法可用于对定频空调进行除霜。具体地，空调具有制热模式以及空调工作于制热模式时满足预设触发条件后启动的除霜模式。The control method of the present invention can be used for defrosting a fixed frequency air conditioner. Specifically, the air conditioner has a heating mode and a defrosting mode that is activated after the air conditioner operates in the heating mode and satisfies the preset trigger condition.
图1是根据本发明一个实施例的控制方法的示意性流程图。参见图1，控制方法包括：1 is a schematic flow chart of a control method in accordance with one embodiment of the present invention. Referring to Figure 1, the control method includes:
步骤S100，空调第n次进入制热模式。In step S100, the air conditioner enters the heating mode for the nth time.
步骤S102，检测空调室内换热器的盘管温度。Step S102, detecting the coil temperature of the heat exchanger in the air conditioner.
步骤S104，判断空调是否满足预设触发条件；若是，则执行步骤S106，若否，则返回继续执行步骤S102。In step S104, it is determined whether the air conditioner satisfies the preset trigger condition; if yes, step S106 is performed, and if no, the process returns to step S102.
步骤S106，空调第m次进入除霜模式，获取运行第n次制热模式全过程的制热模式时间Sy，获取运行第n次制热模式全过程的盘管的总平均温 度Ty，获取运行地n次制热模式全过程的最后一分钟内的盘管的末平均温度Ts。Step S106, the air conditioner enters the defrosting mode for the mth time, obtains the heating mode time Sy for the whole process of running the nth heating mode, and obtains the total average temperature Ty of the coil running the entire process of the nth heating mode, and obtains the operation. The average temperature Ts of the coil in the last minute of the whole process of the n-th heating mode.
步骤S108，判断空调是否已完成第m次除霜程序；若是，则执行步骤S110，若否，则返回继续执行步骤S106。In step S108, it is determined whether the air conditioner has completed the mth defrost program; if yes, step S110 is performed, and if not, returning to step S106.
步骤S110，获取运行第m次除霜模式全过程的除霜模式时间Sc。Step S110, obtaining a defrosting mode time Sc for running the entire process of the mth defrosting mode.
步骤S112，计算校准平均温度Tp。In step S112, the calibration average temperature Tp is calculated.
步骤S113，根据校准平均温度Tp确定空调第m+1次进入除霜模式的动态触发条件。Step S113, determining a dynamic trigger condition of the m+1th entering the defrosting mode of the air conditioner according to the calibrated average temperature Tp.
其中，步骤S100的空调第n次进入制热模式，具体可以为控制空调第n次进入制热模式。The air conditioner of step S100 enters the heating mode for the nth time, and specifically may control the air conditioner to enter the heating mode for the nth time.
具体地，上述步骤中的m和n可以为大于0的任意整数，m和n可以相等或不等。当m＝n＝1时，空调进行首次制热模式和除霜模式，此时预设触发条件可以为目标空调的出厂自带默认触发条件，例如可以为温度控制或时间控制等。当m>1，n>1时，空调已经进行过一次或多次制热模式和除霜模式，此时预设触发条件可以为上一次的空调进入除霜模式的动态触发条件，也即是可以为自第m-1次制热模式进入第n-1次除霜模式时的触发条件。Specifically, m and n in the above steps may be any integer greater than 0, and m and n may be equal or unequal. When m=n=1, the air conditioner performs the first heating mode and the defrost mode. At this time, the preset triggering condition may be the default triggering condition of the target air conditioner, for example, temperature control or time control. When m>1, n>1, the air conditioner has performed one or more heating modes and defrost modes. At this time, the preset trigger condition may be the dynamic trigger condition of the last air conditioner entering the defrost mode, that is, It may be a trigger condition when entering the n-1th defrost mode from the m-1th heating mode.
上述步骤S112中的校准平均温度Tp与盘管温度、制热模式时间Sy和除霜模式时间Sc有关。也即是，根据总平均温度Ty和末平均温度Ts，计算盘管的校准平均温度Tp。The calibration average temperature Tp in the above step S112 is related to the coil temperature, the heating mode time Sy, and the defrosting mode time Sc. That is, the calibration average temperature Tp of the coil is calculated based on the total average temperature Ty and the final average temperature Ts.
特别地，在本发明的一些实施例中，校准平均温度Tp的计算公式为：In particular, in some embodiments of the invention, the formula for calculating the calibrated average temperature Tp is:
Figure PCTCN2018094541-appb-000002
Figure PCTCN2018094541-appb-000002
其中，d为温度补偿值，温度补偿值的是以摄氏度为单位的数值，且可以为-1至2之间的任意整数。Ts和Tp为以摄氏度为单位的数值。Where d is the temperature compensation value, and the temperature compensation value is a value in degrees Celsius, and may be any integer between -1 and 2. Ts and Tp are values in degrees Celsius.
具体地，温度补偿值可根据室外环境温度湿度确定。在本发明的一些实施例中，当空调处于室外环境湿度较大的地区(例如，空气相对湿度大于65％)，且室外环境温度处于-2℃至4℃，此时d可以设置为2(摄氏度)。也即是，这种条件下，室外机上易于产生霜层，霜层太厚不除将导致室内制热效果大大衰减。此时制热模式下输出的制热量会低于且会进一步拉低整个周期的平均制热量，应该尽快除霜。Specifically, the temperature compensation value can be determined according to the outdoor ambient temperature and humidity. In some embodiments of the present invention, when the air conditioner is in an area where the outdoor environment humidity is large (for example, the relative humidity of the air is greater than 65%), and the outdoor ambient temperature is between -2 ° C and 4 ° C, d may be set to 2 ( Celsius). That is to say, under such conditions, the frost layer is easily generated on the outdoor unit, and the frost layer is too thick to cause the indoor heating effect to be greatly attenuated. At this time, the heating capacity output in the heating mode will be lower than and will further lower the average heating capacity of the entire cycle, and should be defrost as soon as possible.
当处于室外环境湿度较小的地区(例如，空气相对湿度小于50％)，且室外环境温度在0℃以下，此时d可以设置为-1(摄氏度)。这种条件下， 室外机不易产生霜层，此时制热量的衰减相对较少，也即是，此时空调输出的制热量在平均制热量之上，可以适当延长制热运行时间。When it is in an area where the outdoor environment humidity is small (for example, the relative humidity of the air is less than 50%), and the outdoor ambient temperature is below 0 °C, d can be set to -1 (degrees Celsius). Under such conditions, the outdoor unit is less prone to frost layer formation, and the heat generation attenuation is relatively small at this time, that is, at this time, the heat output of the air conditioner is above the average heating amount, and the heating operation time can be appropriately extended.
当所处环境湿度和/或温度不满足上述条件时，d可以为默认值0(摄氏度)或根据进一步检测及用户需求综合设定。进一步地，本发明的控制方法使空调在其工作于制热模式时，持续检测室内换热器的盘管温度。持续检测是指当空调工作于制热模式时，每间隔第一预设时间检测一次盘管的实时温度T。When the ambient humidity and / or temperature does not meet the above conditions, d can be the default value of 0 (degrees Celsius) or comprehensively set according to further testing and user needs. Further, the control method of the present invention causes the air conditioner to continuously detect the coil temperature of the indoor heat exchanger while it is operating in the heating mode. Continuous detection refers to detecting the real-time temperature T of the coil once every first preset time when the air conditioner is operating in the heating mode.
具体地，参见图3，检测盘管温度的控制方法包括：Specifically, referring to FIG. 3, a method for controlling the temperature of the coil includes:
步骤S1010，空调运行于制热模式。In step S1010, the air conditioner operates in the heating mode.
步骤S1011，每间隔第一预设时间检测一次盘管的实时温度T。In step S1011, the real-time temperature T of the coil is detected once every first preset time interval.
其中，步骤S1010可以为控制空调运行于制热模式，步骤S1010和步骤S1011可以被分别包含于步骤S100和S102中。Wherein, step S1010 may be to control the air conditioner to operate in the heating mode, and step S1010 and step S1011 may be included in steps S100 and S102, respectively.
盘管温度可包括空调运行制热模式时间Sy内盘管的总平均温度Ty和空调在工作于制热模式时自制热模式切换至除霜模式前第二预设时间内盘管的末平均温度Ts。实时温度T可用于计算总平均温度Ty和末平均温度Ts。The coil temperature may include the total average temperature Ty of the coil in the air conditioning operation heating mode time Sy and the end average temperature of the coil in the second preset time before the self-heating mode is switched to the defrost mode when the air conditioner operates in the heating mode Ts. The real-time temperature T can be used to calculate the total average temperature Ty and the final average temperature Ts.
也即是，步骤S106中的制热模式时间Sy和步骤S110中的除霜模式时间Sc分别是指：当预设触发条件被满足时，空调自制热模式切换至除霜模式，并统计出空调自本次制热模式开启至切换成除霜模式的时间，该时间称为制热模式时间Sy。当空调结束除霜时，获取空调本次运行除霜模式的时间，该时间称为除霜模式时间Sc。That is, the heating mode time Sy in step S106 and the defrost mode time Sc in step S110 respectively mean that when the preset triggering condition is satisfied, the air conditioning self-heating mode is switched to the defrost mode, and the air conditioning is counted. The time from the current heating mode to the switching to the defrost mode is referred to as the heating mode time Sy. When the air conditioner ends the defrosting, the time at which the air conditioner operates the defrosting mode is acquired, and this time is referred to as the defrosting mode time Sc.
本发明的控制方法通过检测最近一次的由制热模式和除霜模式共同组成的工作周期内的盘管温度及各模式的运行时间，可实时地对下一次工作周期内除霜模式的触发条件进行调整，从而使得空调在环境温度和/或湿度等属性改变时，能够在最合适的时机进行化霜，进而使得其化霜效果达到最佳。The control method of the present invention can detect the triggering condition of the defrost mode in the next working cycle in real time by detecting the coil temperature in the working cycle composed of the heating mode and the defrost mode and the running time of each mode. The adjustment is made such that when the air conditioner changes its properties such as ambient temperature and/or humidity, it can be defrosted at the most suitable timing, thereby optimizing the defrosting effect.
在本发明的一些实施例中，第二预设时间可以为1分钟。第一预设时间可以为5～15秒之间的任意值。在本发明的一些优选实施例中，第一预设时间可以为10秒，由此温度检测操作无需过于频繁地执行，且能够获取足够多的的盘管实时温度值(T)，从而计算出准确的总平均温度Ty和末平均温度Ts。In some embodiments of the invention, the second predetermined time may be 1 minute. The first preset time may be any value between 5 and 15 seconds. In some preferred embodiments of the present invention, the first preset time may be 10 seconds, whereby the temperature detecting operation does not need to be performed too frequently, and a sufficient number of coil real-time temperature values (T) can be acquired, thereby calculating Accurate total average temperature Ty and end average temperature Ts.
图2是根据本发明另一个实施例的控制方法的示意性流程图。参见图2，控制方法还包括：2 is a schematic flow chart of a control method according to another embodiment of the present invention. Referring to FIG. 2, the control method further includes:
步骤S114，判断Tp是否等于Ts；若是，则执行步骤S116，若否，则执行步骤S118。In step S114, it is determined whether Tp is equal to Ts; if yes, step S116 is performed, and if no, step S118 is performed.
步骤S116，在空调第n+1次进入制热模式后，当预设触发条件被满足时，空调进入第m+1次除霜模式。Step S116, after the n+1th entry of the air conditioner enters the heating mode, when the preset trigger condition is satisfied, the air conditioner enters the m+1th defrosting mode.
步骤S118，判断Ts是否大于Tp；若是，则执行步骤S122，若否，则执行步骤S120。In step S118, it is determined whether Ts is greater than Tp; if yes, step S122 is performed, and if no, step S120 is performed.
步骤S120，在空调第n+1次进入制热模式后，当盘管的实时温度T达到Tp时，空调立即进入第m+1次除霜模式。In step S120, after the n+1th heating mode of the air conditioner enters the heating mode, when the real-time temperature T of the coil reaches Tp, the air conditioner immediately enters the m+1th defrosting mode.
步骤S122，在空调第n+1次进入制热模式后，当预设触发条件被满足时，空调再延长运行Sa时长的制热模式。Step S122, after the n+1th entry of the air conditioner enters the heating mode, when the preset trigger condition is satisfied, the air conditioner further prolongs the heating mode of the running Sa duration.
步骤S124，在延长运行Sa时间制热模式的过程中，检测盘管的实时温度T是否达到Tp；若是，则执行步骤S128，若否，则执行步骤S126。Step S124, in the process of extending the running Sa time heating mode, detecting whether the real-time temperature T of the coil reaches Tp; if yes, executing step S128; if not, executing step S126.
步骤S126，判断空调是否已经延长运行制热模式Sa时间；若是，则执行步骤S128，若否，则返回继续执行步骤S122。In step S126, it is determined whether the air conditioner has extended the running heating mode Sa time; if yes, step S128 is performed, and if not, returning to step S122.
步骤S128，立即进入第m+1次除霜程序。In step S128, the m+1th defrosting program is immediately entered.
上一实施例中步骤S113可包含步骤S114至步骤S128的部分或全部内容。Step S113 in the previous embodiment may include part or all of the contents from step S114 to step S128.
在本发明的控制方法中，步骤S122中的第三预设时间Sa可根据末平均温度Ts和校准平均温度Tp的大小确定，其具体的计算公式为：In the control method of the present invention, the third preset time Sa in step S122 can be determined according to the size of the final average temperature Ts and the calibration average temperature Tp, and the specific calculation formula is:
Sa＝c·(Ts-Tp)Sa=c·(Ts-Tp)
其中，c为校准系数，其具体取值可以为0.5至2之间的任意值。Sa为以分钟为单位的数值，Ts和Tp为以摄氏度为单位的数值。也就是说，当c＝1时，Ts高出Tp的单位为摄氏度的温度值即是预设触发条件被满足后空调需要延长运行的分钟数。Where c is a calibration coefficient, and the specific value may be any value between 0.5 and 2. Sa is the value in minutes, and Ts and Tp are the values in degrees Celsius. That is to say, when c=1, the temperature value of Ts higher than Tp in degrees Celsius is the number of minutes that the air conditioner needs to be extended after the preset trigger condition is satisfied.
具体地，校准系数c可根据Ts和Tp的差值进行选取设定。当Ts-Tp≤2时，校准系数c可以设置为1。当Ts-Tp＞2，校准系数可以设置为1.5。进一步地在制热模式延长运行的第三预设时间Sa的过程中，若出现T＝Tp则认定为满足动态除霜条件，立即运行第m+1次除霜程序，若在第三预设时间Sa内T未达到Tp，则待延长运行完成后再进入第m+1次除霜程序。Specifically, the calibration coefficient c can be selected and set according to the difference between Ts and Tp. When Ts-Tp ≤ 2, the calibration coefficient c can be set to 1. When Ts-Tp>2, the calibration factor can be set to 1.5. Further, in the process of extending the third preset time Sa of the heating mode, if T=Tp occurs, it is determined that the dynamic defrosting condition is satisfied, and the m+1th defrosting program is immediately executed, if the third preset is If T does not reach Tp within time Sa, then the m+1th defrost procedure is entered after the extended operation is completed.
也即是，本控制方法通过比较末平均温度Ts和校准平均温度Tp的大小来设定下一次进入除霜模式的动态触发条件。若末平均温度Ts等于校准平均温度Tp，则空调下一次进入除霜模式的动态触发条件设置为预设触发条 件。若末平均温度Ts小于校准平均温度Tp，则空调下一次进入除霜模式的动态触发条件设置为盘管在制热模式下的实时温度T达到校准平均温度Tp。若末平均温度Ts大于校准平均温度Tp，则空调下一次进入除霜模式的动态触发条件设置为预设触发条件被满足后空调延长运行制热模式第三预设时间Sa。进一步地，若空调的盘管的实时温度T在延长运行制热模式的第三预设时间Sa内达到校准平均温度Tp，则空调立即进入下一次除霜模式。That is, the present control method sets the dynamic trigger condition for entering the defrosting mode for the next time by comparing the final average temperature Ts with the magnitude of the calibrated average temperature Tp. If the average temperature Ts is equal to the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set as the preset trigger condition. If the average temperature Ts is less than the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set to the real-time temperature T of the coil in the heating mode to reach the calibration average temperature Tp. If the average temperature Ts is greater than the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set to the third preset time Sa after the preset trigger condition is satisfied. Further, if the real-time temperature T of the coil of the air conditioner reaches the calibration average temperature Tp within the third preset time Sa of the extended running heating mode, the air conditioner immediately enters the next defrost mode.
本发明的控制方法通过寻找最佳除霜点，保证在整个制热周期输出最大的平均制热量。也即是，本发明的控制方法可以使空调在制热模式效果不佳时及时运行除霜模式，在制热效果良好时延长制热模式运行时间，由此可以在更短的除霜时间内获得更佳的除霜效果，并大大提升除霜后制热模式的制热效率，延长高效的制热时间，获取最佳的制热效果，且本控制方法无需增加空调的硬件成本即可提升用户体验。The control method of the present invention ensures that the maximum average heating capacity is output throughout the heating cycle by finding the optimum defrost point. That is, the control method of the present invention can enable the air conditioner to operate the defrosting mode in time when the heating mode is not effective, and prolong the heating mode running time when the heating effect is good, thereby enabling a shorter defrosting time. Obtain better defrosting effect, greatly improve the heating efficiency of the heating mode after defrosting, prolong the efficient heating time, and obtain the best heating effect, and the control method can improve the user without increasing the hardware cost of the air conditioner. Experience.
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。In this regard, it will be appreciated by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the invention should be understood and construed as covering all such other modifications or modifications.

Claims (10)

  1. 一种空调除霜的控制方法，所述空调具有制热模式以及所述空调工作于所述制热模式时满足预设触发条件后启动的除霜模式，所述控制方法包括：A control method for air conditioning defrosting, the air conditioner having a heating mode and a defrosting mode activated after the air conditioner operates in the heating mode to satisfy a preset trigger condition, the control method comprising:
    在所述空调工作于所述制热模式时，持续检测室内换热器的盘管温度；When the air conditioner operates in the heating mode, continuously detecting the coil temperature of the indoor heat exchanger;
    当所述预设触发条件被满足时，所述空调自所述制热模式切换至所述除霜模式，并统计出所述空调自本次所述制热模式开启至切换成所述除霜模式的时间，该时间称为制热模式时间Sy；When the preset trigger condition is satisfied, the air conditioner switches from the heating mode to the defrost mode, and counts that the air conditioner is turned on from the current heating mode to the defrosting The time of the mode, this time is called the heating mode time Sy;
    当所述空调结束除霜时，获取所述空调本次运行所述除霜模式的时间，该时间称为除霜模式时间Sc；以及When the air conditioner ends the defrosting, acquiring a time when the air conditioner is currently running the defrosting mode, the time being referred to as a defrosting mode time Sc;
    根据所述盘管温度、所述制热模式时间Sy和所述除霜模式时间Sc，确定所述空调下一次进入所述除霜模式的动态触发条件。A dynamic trigger condition for the air conditioner to enter the defrost mode next time is determined according to the coil temperature, the heating mode time Sy, and the defrost mode time Sc.
  2. 根据权利要求1所述的控制方法，其中，所述盘管温度包括：The control method according to claim 1, wherein the coil temperature comprises:
    所述空调在工作于所述制热模式的所述制热模式时间Sy内盘管的总平均温度Ty和所述空调在工作于所述制热模式时自所述制热模式切换至所述除霜模式前第二预设时间内盘管的末平均温度Ts；且The total average temperature Ty of the coil in the heating mode time Sy operating in the heating mode and the air conditioner switching from the heating mode to the said when operating in the heating mode The average temperature Ts of the coil at the second preset time before the defrost mode;
    当所述空调工作于所述制热模式时，每间隔第一预设时间检测一次所述盘管的实时温度T。When the air conditioner operates in the heating mode, the real-time temperature T of the coil is detected once every first preset time interval.
  3. 根据权利要求2所述的控制方法，其中，The control method according to claim 2, wherein
    所述第二预设时间为1分钟，所述第一预设时间为5～15秒之间的任意值。The second preset time is 1 minute, and the first preset time is any value between 5 and 15 seconds.
  4. 根据权利要求2所述的控制方法，还包括：The control method according to claim 2, further comprising:
    根据所述总平均温度Ty和所述末平均温度Ts，计算所述盘管的校准平均温度Tp，并比较所述末平均温度Ts和所述校准平均温度Tp的大小。The calibration average temperature Tp of the coil is calculated based on the total average temperature Ty and the final average temperature Ts, and the magnitudes of the final average temperature Ts and the calibration average temperature Tp are compared.
  5. 根据权利要求4所述的控制方法，其中，The control method according to claim 4, wherein
    所述校准平均温度Tp的计算公式为：The calculation formula of the calibration average temperature Tp is:
    Figure PCTCN2018094541-appb-100001
    Figure PCTCN2018094541-appb-100001
    其中，d为温度补偿值，所述温度补偿值为-1至2之间的任意整数。Where d is a temperature compensation value, and the temperature compensation value is an arbitrary integer between -1 and 2.
  6. 根据权利要求4所述的控制方法，还包括：The control method according to claim 4, further comprising:
    若所述末平均温度Ts等于所述校准平均温度Tp，则所述空调下一次进 入所述除霜模式的所述动态触发条件设定为所述预设触发条件。If the end average temperature Ts is equal to the calibration average temperature Tp, the dynamic trigger condition for the next time the air conditioner enters the defrost mode is set to the preset trigger condition.
  7. 根据权利要求4所述的控制方法，还包括：The control method according to claim 4, further comprising:
    若所述末平均温度Ts小于所述校准平均温度Tp，则所述空调下一次进入所述除霜模式的所述动态触发条件设定为所述盘管的所述实时温度T达到所述校准平均温度Tp。If the end average temperature Ts is less than the calibration average temperature Tp, the dynamic trigger condition of the air conditioner entering the defrost mode next time is set to the real-time temperature T of the coil to reach the calibration. Average temperature Tp.
  8. 根据权利要求4所述的控制方法，还包括：The control method according to claim 4, further comprising:
    若所述末平均温度Ts大于所述校准平均温度Tp，则所述空调下一次进入所述除霜模式的所述动态触发条件设定为所述预设触发条件被满足后所述空调延长运行所述制热模式达第三预设时间Sa；其中If the end average temperature Ts is greater than the calibration average temperature Tp, the dynamic trigger condition of the next time the air conditioner enters the defrost mode is set to be that the preset trigger condition is satisfied after the air conditioner is extended. The heating mode reaches a third preset time Sa; wherein
    若所述空调的所述盘管的所述实时温度T在延长运行所述制热模式的所述第三预设时间Sa内达到所述校准平均温度Tp，则所述空调立即进入下一次所述除霜模式。If the real-time temperature T of the coil of the air conditioner reaches the calibration average temperature Tp within the third preset time Sa for extending the heating mode, the air conditioner immediately enters the next time Defrost mode.
  9. 根据权利要求8所述的控制方法，其中，The control method according to claim 8, wherein
    所述第三预设时间Sa根据所述末平均温度Ts和所述校准平均温度Tp的大小确定。The third preset time Sa is determined according to the final average temperature Ts and the magnitude of the calibration average temperature Tp.
  10. 根据权利要求9所述的控制方法，其中，The control method according to claim 9, wherein
    所述第三预设时间Sa的计算公式为：The calculation formula of the third preset time Sa is:
    Sa＝c·(Ts-Tp)Sa=c·(Ts-Tp)
    其中，c为校准系数，Sa为以分钟为单位的数值，Ts和Tp为以摄氏度为单位的数值。Where c is the calibration coefficient, Sa is the value in minutes, and Ts and Tp are the values in degrees Celsius.
PCT/CN2018/094541 2017-07-05 2018-07-04 Air conditioner defrosting control method WO2019007376A1 (en)

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