CN113531773B - Multi-connected air conditioner fault detection method and device and multi-connected air conditioner - Google Patents
Multi-connected air conditioner fault detection method and device and multi-connected air conditioner Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及空调技术领域，具体而言，涉及一种多联空调故障检测方法、装置及多联空调。The invention relates to the technical field of air conditioners, in particular to a multi-connected air conditioner fault detection method and device, and a multi-connected air conditioner.
背景技术Background technique
多联空调包括多台室内机，在多联空调运行过程中，通常会有多台室内机同时开启使用，若任意室内机管路出现故障，诸如管路堵塞故障，由于其他室内机处于正常运行状态，室外压缩机受管路堵塞影响并不明显，不会引发保护，导致无法及时识别出现故障的室内机。A multi-connected air conditioner includes multiple indoor units. During the operation of a multi-connected air conditioner, multiple indoor units are usually turned on at the same time. state, the outdoor compressor is not obviously affected by the blockage of the pipeline, and the protection will not be triggered, resulting in the failure to identify the faulty indoor unit in time.
发明内容Contents of the invention
为解决上述问题，本发明提供了一种多联空调故障检测方法、装置及多联空调，能够准确检测出存在故障的室内机，提升了多联空调故障检测的准确性。In order to solve the above problems, the present invention provides a multi-connected air conditioner fault detection method, device and multi-connected air conditioner, which can accurately detect faulty indoor units and improve the accuracy of multi-connected air conditioner fault detection.
根据本发明实施例，一方面提供了一种多联空调故障检测方法，包括：当多联空调开启时，监测室内环境温度，监测第一室内机的盘管温度；其中，所述第一室内机为处于开机状态的室内机；当所述第一室内机运行第一预设时长时，基于所述室内环境温度及所述盘管温度判断所述第一室内机中是否存在换热失效的目标室内机；如果是，对所述目标室内机进行故障验证，当故障验证通过时，确认所述目标室内机存在故障。According to an embodiment of the present invention, on the one hand, a multi-connected air conditioner fault detection method is provided, including: when the multi-connected air conditioner is turned on, monitoring the indoor ambient temperature, and monitoring the coil temperature of the first indoor unit; wherein, the first indoor unit The indoor unit is an indoor unit in the power-on state; when the first indoor unit is running for a first preset time, it is judged based on the indoor ambient temperature and the coil temperature whether there is a failure of heat exchange in the first indoor unit The target indoor unit; if yes, performing fault verification on the target indoor unit, and confirming that the target indoor unit has a fault when the fault verification is passed.
通过采用上述技术方案，根据各运行状态下的室内机的室内环境温度及盘管温度判断是否存在换热效率效果较差的目标室内机，并对换热效果较差的目标室内机进行进一步故障验证，可以准确检测出存在故障的室内机，提升了多联空调故障检测的准确性。By adopting the above technical solution, it is judged whether there is a target indoor unit with poor heat exchange efficiency according to the indoor ambient temperature and coil temperature of the indoor units in each operating state, and further faults are performed on the target indoor unit with poor heat exchange effect Verification can accurately detect faulty indoor units, improving the accuracy of multi-connected air conditioner fault detection.
优选的，所述基于所述室内环境温度及所述盘管温度判断所述第一室内机中是否存在换热失效的目标室内机的步骤，包括：获取各膨胀阀开启前的所述第一室内机对应的第一室内环境温度及第一盘管温度；当所述第一室内机运行第一预设时长时，每间隔第二预设时长获取所述第一室内机当前的第二室内环境温度及第二盘管温度，计算所述第一室内环境温度与第二室内环境温度的第一温度差值，计算所述第一盘管温度与所述第二盘管温度的第二温度差值；基于所述第一温度差值及所述第二温度差值判断所述第一室内机中是否存在换热失效的目标室内机。Preferably, the step of judging whether there is a target indoor unit with heat exchange failure in the first indoor unit based on the indoor ambient temperature and the coil temperature includes: obtaining the first indoor unit before each expansion valve is opened. The first indoor ambient temperature and the first coil temperature corresponding to the indoor unit; when the first indoor unit is running for the first preset time, the current second indoor temperature of the first indoor unit is obtained every second preset time. ambient temperature and the second coil temperature, calculate the first temperature difference between the first indoor ambient temperature and the second indoor ambient temperature, and calculate the second temperature between the first coil temperature and the second coil temperature difference: judging whether there is a target indoor unit with heat exchange failure among the first indoor units based on the first temperature difference and the second temperature difference.
通过采用上述技术方案，获取各开机状态的室内机对应的第一温度差值和第二温度差值，可以准确判断各开机状态的室内机的换热能力，以便快速从各运行室内机中筛选出存在换热故障的目标室内机，提升了故障检测效率。By adopting the above technical solution, the first temperature difference value and the second temperature difference value corresponding to the indoor units in each power-on state can be obtained, and the heat exchange capacity of the indoor units in each power-on state can be accurately judged, so as to quickly select from the running indoor units Target indoor units with heat exchange faults are detected, which improves fault detection efficiency.
优选的，所述基于所述第一温度差值及所述第二温度差值判断所述第一室内机中是否存在换热失效的目标室内机的步骤，包括：将所述第一室内机中满足所述第一温度差值小于第一预设阈值，且所述第二温度差值小于第二预设阈值的室内机作为目标室内机，确定所述目标室内机换热失效。Preferably, the step of judging whether there is a target indoor unit with heat exchange failure in the first indoor unit based on the first temperature difference and the second temperature difference includes: setting the first indoor unit to Among them, the indoor units satisfying that the first temperature difference is smaller than the first preset threshold and the second temperature difference is smaller than the second preset threshold are used as target indoor units, and it is determined that the target indoor unit has a heat exchange failure.
通过采用上述技术方案，将开机前后室内环境温度的变化量小于第一预设阈值，且盘管温度的变化量小于第二预设阈值的室内机作为存在换热失效的目标室内机，提升了故障检测的准确性。By adopting the above technical solution, the indoor units whose indoor ambient temperature variation before and after startup is less than the first preset threshold and whose coil temperature variation is smaller than the second preset threshold are taken as the target indoor units with heat exchange failure, improving the Accuracy of fault detection.
优选的，所述对所述目标室内机进行故障验证的步骤，包括：当确定所述目标室内机换热失效时，将所述目标室内机对应的目标计数器的计数结果加1；其中，所述目标计数器的初值为0；当所述目标计数器的计数结果大于等于预设次数，且所述目标室内机未被记录为故障误报时，控制所述多联空调对所述目标室内机进行故障验证。Preferably, the step of verifying the failure of the target indoor unit includes: when it is determined that the target indoor unit fails to exchange heat, adding 1 to the counting result of the target counter corresponding to the target indoor unit; wherein, the The initial value of the target counter is 0; when the counting result of the target counter is greater than or equal to the preset number of times, and the target indoor unit is not recorded as a false fault report, the multi-connected air conditioner is controlled to perform a fault on the target indoor unit Failure verification.
通过采用上述技术方案，统计目标室内机出现换热失效的次数，并在目标室内机出现换热失效的次数较多时，对目标室内机进行故障验证，在避免对室内机故障的误检测，提升了多联空调故障检测的可靠性。By adopting the above technical scheme, the number of heat exchange failures of the target indoor unit is counted, and when the number of heat exchange failures of the target indoor unit is large, the fault verification of the target indoor unit is carried out to avoid false detection of indoor unit faults and improve The reliability of multi-connected air conditioner fault detection is improved.
优选的，所述控制所述多联空调对所述目标室内机进行故障验证的步骤，包括：当第二室内机达温停机，或所述第二室内机对应的室内环境温度与设定温度差值小于第三预设阈值时，控制所述第二室内机对应的第二膨胀阀关闭，控制所述目标室内机对应的目标膨胀阀打开至最大开度；其中，所述第二室内机包括所述第一室内机中除所述目标室内机之外的全部室内机；当所述目标膨胀阀以所述最大开度运行第三预设时长时，基于所述室内环境温度及所述盘管温度判断所述目标室内机是否存在换热故障，如果是，验证通过所述目标室内机存在换热故障。Preferably, the step of controlling the multi-connected air conditioner to perform fault verification on the target indoor unit includes: shutting down when the second indoor unit reaches temperature, or the indoor ambient temperature corresponding to the second indoor unit is different from the set temperature When the difference is less than the third preset threshold, the second expansion valve corresponding to the second indoor unit is controlled to close, and the target expansion valve corresponding to the target indoor unit is controlled to open to the maximum opening degree; wherein, the second indoor unit Including all indoor units in the first indoor unit except the target indoor unit; when the target expansion valve operates at the maximum opening for a third preset time, based on the indoor ambient temperature and the The coil temperature judges whether the target indoor unit has a heat exchange failure, and if so, verifies that the target indoor unit has a heat exchange failure.
通过采用上述技术方案，在第二室内机达温停机或室内环境温度接近设定温度时，控制第二室内机对应的电子膨胀阀关闭，避免了影响多联空调的正常工作，通过控制目标室内机单独运行，可以准确检测目标室内机是否存在换热故障，降低了故障误检率。By adopting the above technical solution, when the second indoor unit reaches the temperature and shuts down or the indoor ambient temperature is close to the set temperature, the electronic expansion valve corresponding to the second indoor unit is controlled to close, which avoids affecting the normal operation of the multi-connected air conditioner. The unit operates independently, which can accurately detect whether the target indoor unit has a heat exchange failure, reducing the false detection rate of failure.
优选的，所述基于所述室内环境温度及所述盘管温度判断所述目标室内机是否存在换热故障的步骤，包括：获取所述目标室内机对应的当前的第三室内环境温度及第三盘管温度；计算所述第三室内环境温度与所述第一室内环境温度的第三温度差值，计算所述第三盘管温度与所述第一盘管温度的第四温度差值；当所述第三温度差值小于第一预设阈值，且所述第四温度差值小于第二预设阈值时，确定所述目标室内机存在换热故障。Preferably, the step of judging whether the target indoor unit has a heat exchange failure based on the indoor ambient temperature and the coil temperature includes: obtaining the current third indoor ambient temperature and the second indoor ambient temperature corresponding to the target indoor unit. Three coil temperatures; calculate the third temperature difference between the third indoor ambient temperature and the first indoor ambient temperature, and calculate the fourth temperature difference between the third coil temperature and the first coil temperature ; when the third temperature difference is less than a first preset threshold and the fourth temperature difference is less than a second preset threshold, determining that the target indoor unit has a heat exchange failure.
通过采用上述技术方案，在目标室内机单独运行时，再次基于室内环境温度变化值及盘管温度变化值判断目标室内机是否存在换热故障，可以准确识别目标室内机是否存在换热故障，提升了故障检测的准确度。By adopting the above technical solution, when the target indoor unit is running alone, it is judged whether the target indoor unit has a heat exchange failure based on the indoor environment temperature change value and the coil temperature change value again, so that it can accurately identify whether the target indoor unit has a heat exchange failure, and improve the performance of the target indoor unit. the accuracy of fault detection.
优选的，所述多联空调故障检测方法还包括：当所述目标室内机不存在换热故障时，记录所述目标室内机为故障误报；或者，当所述目标室内机存在换热故障时，控制压缩机报低压保护故障，当接收所述目标室内机检修完成的指令时，控制所述目标计数器清零。Preferably, the multi-connected air conditioner failure detection method further includes: when the target indoor unit does not have a heat exchange failure, recording that the target indoor unit is a false report of failure; or, when the target indoor unit has a heat exchange failure , control the compressor to report a low-voltage protection fault, and control the target counter to be cleared when receiving the instruction that the target indoor unit is overhauled.
通过采用上述技术方案，在确定目标室内机不存在换热故障时，记录为故障误报，以避免对目标室内机进行多余的故障验证，提升了故障检测效率；通过使压缩机报低压保护故障，以便使检修人员及时对目标室内机进行检修，提升了多联空调运行的稳定性。By adopting the above technical scheme, when it is determined that the target indoor unit does not have a heat exchange fault, it will be recorded as a false fault report, so as to avoid unnecessary fault verification on the target indoor unit and improve the fault detection efficiency; by making the compressor report a low-voltage protection fault , so that maintenance personnel can timely perform maintenance on the target indoor unit, and improve the stability of the operation of the multi-connected air conditioner.
根据本发明实施例，另一方面提供了一种多联空调故障检测装置，包括：监测模块，用于当多联空调开启时，监测室内环境温度，监测第一室内机的盘管温度；其中，所述第一室内机为处于开机状态的室内机；判断模块，用于当所述第一室内机运行第一预设时长时，基于所述室内环境温度及所述盘管温度判断所述第一室内机中是否存在换热失效的目标室内机；验证模块，用于在所述第一室内机中存在换热失效的目标室内机时，对所述目标室内机进行故障验证，当故障验证通过时，确认所述目标室内机存在故障。According to an embodiment of the present invention, another aspect provides a multi-connected air conditioner fault detection device, including: a monitoring module, used to monitor the indoor ambient temperature and monitor the coil temperature of the first indoor unit when the multi-connected air conditioner is turned on; , the first indoor unit is an indoor unit in a power-on state; a judging module, configured to judge the indoor environment temperature and the coil temperature when the first indoor unit is running for a first preset time. Whether there is a target indoor unit with heat exchange failure in the first indoor unit; the verification module is used to verify the failure of the target indoor unit when there is a target indoor unit with heat exchange failure in the first indoor unit, and when the failure When the verification is passed, it is confirmed that the target indoor unit is faulty.
根据本发明实施例，另一方面提供了一种多联空调，包括存储有计算机程序的计算机可读存储介质和处理器，所述计算机程序被所述处理器读取并运行时，实现第一方面任一项所述的方法。According to an embodiment of the present invention, another aspect provides a multi-connected air conditioner, including a computer-readable storage medium storing a computer program and a processor. When the computer program is read and run by the processor, the first The method described in any one of the aspects.
根据本发明实施例，另一方面提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序被处理器读取并运行时，实现如第一方面任一项所述的方法。According to an embodiment of the present invention, another aspect provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is read and run by a processor, any aspect of the first aspect is implemented. one of the methods described.
本发明具有以下有益效果：在多联空调运行过程中，通过根据各运行状态下的室内机的室内环境温度及盘管温度判断是否存在换热效率效果较差的目标室内机，并对换热效果较差的目标室内机进行进一步故障验证，可以准确检测出存在故障的室内机，提升了多联空调故障检测的准确性。The present invention has the following beneficial effects: during the operation of the multi-connected air conditioner, it is judged whether there is a target indoor unit with poor heat exchange efficiency according to the indoor ambient temperature and the coil temperature of the indoor units in each operating state, and the heat exchange efficiency is determined. The target indoor unit with poor effect is further verified for faults, and the faulty indoor unit can be accurately detected, which improves the accuracy of multi-connected air conditioner fault detection.
附图说明Description of drawings
为了更清楚地说明本发明的实施方式或现有技术中的技术方案，下面将对实施方式或现有技术描述中所需要使用的附图作简单地介绍。显而易见地，下面描述中的附图仅仅是示例性的，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图引伸获得其它的实施附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.
本说明书所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容得能涵盖的范围内。The structures, proportions, sizes, etc. shown in this manual are only used to cooperate with the content disclosed in the manual, so that people familiar with this technology can understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no technical In the substantive meaning above, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered.
图1为本发明提供的一种多联空调故障检测方法流程图；Fig. 1 is a flow chart of a multi-connected air conditioner fault detection method provided by the present invention;
图2为本发明提供的一种多联机室内机管路堵塞判断流程图；Fig. 2 is a flow chart for judging pipeline blockage of a multi-connected indoor unit provided by the present invention;
图3为本发明提供的一种多联空调故障检测装置结构示意图。Fig. 3 is a structural schematic diagram of a multi-connected air conditioner fault detection device provided by the present invention.
具体实施方式Detailed ways
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
本实施例提供了一种多联空调故障检测方法，该方法可以应用于多联空调，参见如图1所示的多联空调故障检测方法流程图，该方法主要包括以下步骤S102～步骤S106：This embodiment provides a multi-connected air conditioner fault detection method, which can be applied to multi-connected air conditioners, see the flow chart of the multi-connected air conditioner fault detection method shown in Figure 1, the method mainly includes the following steps S102 to S106:
步骤S102：当多联空调开启时，监测室内环境温度，监测第一室内机的盘管温度。Step S102: When the multi-connected air conditioner is turned on, monitor the indoor ambient temperature, and monitor the coil temperature of the first indoor unit.
第一室内机为处于开机状态的室内机。当多联空调开启运行时，基于第一温度传感器实时检测处于开机状态的各室内机对应的室内环境温度，基于第二温度传感器实时检测处于开机状态的各室内机对应的盘管温度。The first indoor unit is an indoor unit in a power-on state. When the multi-connected air conditioner is turned on and running, the first temperature sensor detects the indoor ambient temperature corresponding to each indoor unit in the power-on state in real time, and the coil temperature corresponding to each indoor unit in the power-on state is detected in real time based on the second temperature sensor.
步骤S104：当第一室内机运行第一预设时长时，基于室内环境温度及盘管温度判断第一室内机中是否存在换热失效的目标室内机。Step S104: When the first indoor unit is running for a first preset time, judge whether there is a target indoor unit with heat exchange failure among the first indoor units based on the indoor ambient temperature and the coil temperature.
上述第一预设时长可以是多联空调能够进入稳定制冷或制热运行状态的时长，上述第一预设时长的取值范围可以是15～30min。The above-mentioned first preset time length may be the time length during which the multi-connected air conditioner can enter a stable cooling or heating operation state, and the value range of the above-mentioned first preset time length may be 15-30 minutes.
当上述处于开机状态的第一室内机的运行时长达到第一预设时长时，根据监测到的室内环境温度及盘管温度，周期性判断各个处于运行状态的室内机是否存在换热失效的情况，即换热效果较差，将处于运行状态的第一室内机中出现换热失效故障的室内机作为目标室内机。When the running time of the above-mentioned first indoor units in the power-on state reaches the first preset time, according to the monitored indoor ambient temperature and coil temperature, it is periodically judged whether each indoor unit in the running state has heat exchange failure. , that is, the heat exchange effect is poor, and the indoor unit that has a heat exchange failure among the first indoor units in the running state is used as the target indoor unit.
步骤S106：如果是，对目标室内机进行故障验证，当故障验证通过时，确认目标室内机存在故障。Step S106: If yes, perform fault verification on the target indoor unit, and confirm that the target indoor unit has a fault when the fault verification is passed.
当上述处于开机状态的第一室内机中存在换热失效的目标室内机时，为了避免判断失误，基于监测到的室内环境温度及盘管温度，再次对目标室内机进行故障验证，当目标室内机故障验证通过时，确定目标室内机存在换热效果较差的故障，该目标室内机可能存在管路堵塞故障。When there is a target indoor unit with heat exchange failure among the above-mentioned first indoor units in the power-on state, in order to avoid misjudgment, based on the monitored indoor ambient temperature and coil temperature, the target indoor When the unit failure verification is passed, it is determined that the target indoor unit has a fault with poor heat exchange effect, and the target indoor unit may have a pipeline blockage fault.
本实施例提供的上述多联空调故障检测方法，在多联空调运行过程中，通过根据各运行状态下的室内机的室内环境温度及盘管温度判断是否存在换热效率效果较差的目标室内机，并对换热效果较差的目标室内机进行进一步故障验证，可以准确检测出存在故障的室内机，提升了多联空调故障检测的准确性。In the above multi-connected air conditioner fault detection method provided in this embodiment, during the operation of the multi-connected air conditioner, it is judged whether there is a target indoor with poor heat exchange efficiency according to the indoor ambient temperature and coil temperature of the indoor unit in each operating state. Units, and further fault verification of target indoor units with poor heat transfer effects can accurately detect faulty indoor units, improving the accuracy of multi-connected air conditioner fault detection.
为了准确筛选出换热失效的目标室内机，本实施例提供了基于室内环境温度及盘管温度判断第一室内机中是否存在换热失效的目标室内机的实施方式，具体可参照如下步骤(1)～步骤(3)执行：In order to accurately screen out the target indoor units with heat exchange failure, this embodiment provides an implementation manner of judging whether there is a target indoor unit with heat exchange failure in the first indoor unit based on the indoor ambient temperature and the coil temperature. For details, refer to the following steps ( 1) ~ step (3) execution:
步骤(1)：获取各膨胀阀开启前的第一室内机对应的第一室内环境温度及第一盘管温度。Step (1): Obtain the first indoor ambient temperature and the first coil temperature corresponding to the first indoor unit before each expansion valve is opened.
在各开机状态的第一室内机的膨胀阀开启之前，获取检测到的各开机状态的室内机对应的室内环境温度，记为第一室内环境温度，获取检测到的各开机状态的室内机对应的盘管温度，记为第一盘管温度。Before the expansion valve of the first indoor unit in each power-on state is opened, the detected indoor ambient temperature corresponding to the indoor unit in each power-on state is obtained, which is recorded as the first indoor ambient temperature, and the corresponding temperature of the detected indoor unit in each power-on state is obtained. The coil temperature is recorded as the first coil temperature.
步骤(2)：当第一室内机运行第一预设时长时，每间隔第二预设时长获取第一室内机当前的第二室内环境温度及第二盘管温度，计算第一室内环境温度与第二室内环境温度的第一温度差值，计算第一盘管温度与第二盘管温度的第二温度差值。Step (2): When the first indoor unit is running for the first preset time, obtain the current second indoor ambient temperature and the second coil temperature of the first indoor unit at intervals of the second preset time, and calculate the first indoor ambient temperature The first temperature difference between the second indoor ambient temperature and the second temperature difference between the first coil temperature and the second coil temperature is calculated.
上述第二预设时长可以是室内环境温度或盘管温度会产生变化的时长，上述第二预设时长的取值范围可以是15～30min。上述第一温度差值为第一室内环境温度与第二室内环境温度的差值的绝对值，上述第二温度差值为第一盘管温度与第二盘管温度的差值的绝对值。The second preset duration may be a duration during which the indoor ambient temperature or coil temperature may change, and the value range of the second preset duration may be 15 to 30 minutes. The first temperature difference is the absolute value of the difference between the first indoor ambient temperature and the second indoor ambient temperature, and the second temperature difference is the absolute value of the difference between the first coil temperature and the second coil temperature.
当室内机开机运行第一预设时长时，周期性获取各开机状态的室内机对应的当前的室内环境温度或出风口温度，记为第二室内环境温度，周期性获取各开机状态的室内机对应的当前的盘管温度，记为第二盘管温度。When the indoor units are powered on and run for the first preset time, the current indoor ambient temperature or air outlet temperature corresponding to the indoor units in each powered-on state is periodically obtained, which is recorded as the second indoor ambient temperature, and the indoor units in each powered-on state are periodically obtained The corresponding current coil temperature is recorded as the second coil temperature.
根据每个周期获取到的第二室内环境温度，计算各个处于开机状态的室内机的第二室内环境温度与其对应的第一室内环境温度的差值，得到各个开机状态的室内机对应的第一温度差值，即检测各开机状态的室内机在开机前与开机运行一段时间后的室内环境温度的变化值。According to the second indoor ambient temperature obtained in each cycle, the difference between the second indoor ambient temperature of each indoor unit in the power-on state and the corresponding first indoor ambient temperature is calculated to obtain the first indoor temperature corresponding to each indoor unit in the power-on state. The temperature difference is to detect the change value of the indoor ambient temperature of each indoor unit in the power-on state before the power-on and after the power-on operation for a period of time.
根据每个周期获取到的第二盘管温度，计算各个处于开机状态的室内机的第二盘管温度与其对应的第一盘管温度的差值，得到各个开机状态的室内机对应的第二温度差值，即检测各个开机状态的室内机在开机前与开机运行一段时间后的盘管温度的变化值。According to the second coil temperature obtained in each cycle, calculate the difference between the second coil temperature of each indoor unit in the power-on state and the corresponding first coil temperature, and obtain the second coil temperature corresponding to each indoor unit in the power-on state. Temperature difference, that is, to detect the change value of the coil temperature of the indoor units in each startup state before startup and after startup for a period of time.
步骤(3)：基于第一温度差值及第二温度差值判断第一室内机中是否存在换热失效的目标室内机。Step (3): Based on the first temperature difference and the second temperature difference, it is judged whether there is a target indoor unit with heat exchange failure among the first indoor units.
由于各个室内机对应的室内环境温度的变化值及盘管温度的变化值可以反应换热能力大小，根据上述第一温度差值及第二温度差值可以准确判断各开机状态的室内机是否存在换热失效或换热能力较差情况，将换热失效或换热能力较差的室内机作为目标室内机。Since the change value of the indoor ambient temperature and the change value of the coil temperature corresponding to each indoor unit can reflect the heat exchange capacity, according to the above-mentioned first temperature difference and second temperature difference, it can be accurately judged whether there are indoor units in the power-on state. In the case of heat exchange failure or poor heat exchange capacity, the indoor unit with heat exchange failure or poor heat exchange capacity is used as the target indoor unit.
通过获取各开机状态的室内机对应的第一温度差值和第二温度差值，可以准确判断各开机状态的室内机的换热能力，以便快速从各运行室内机中筛选出存在换热故障的目标室内机，提升了故障检测效率。By obtaining the first temperature difference and the second temperature difference corresponding to the indoor units in the power-on state, the heat exchange capacity of the indoor units in the power-on state can be accurately judged, so as to quickly screen out the heat transfer faults from the running indoor units The target indoor unit improves the fault detection efficiency.
在一种可行的实施方式中，将第一室内机中满足第一温度差值小于第一预设阈值，且第二温度差值小于第二预设阈值的室内机作为目标室内机，确定目标室内机换热失效。In a feasible implementation manner, among the first indoor units, the indoor units satisfying that the first temperature difference is smaller than the first preset threshold and the second temperature difference is smaller than the second preset threshold are taken as the target indoor units, and the target indoor unit is determined. The heat exchange of the indoor unit fails.
判断第一室内机中是否存在室内机同时满足第一温度差值小于第一预设阈值，且第二温度差值小于第二预设阈值，如果存在，记录该室内机为目标室内机，确定目标室内机为存在换热失效故障的室内机。上述第一预设阈值的取值范围可以是1-4℃，上述第二预设阈值的取值范围可以是2-5℃，当室内机开机前后室内环境温度的变化量较小，且盘管温度的变化量较小时，表明该室内机运行一段时间后，并未有效降低或提升室内环境温度，确定室内机的换热能力微弱。Judging whether there is an indoor unit in the first indoor unit and at the same time satisfying that the first temperature difference is less than the first preset threshold and the second temperature difference is less than the second preset threshold, if it exists, record the indoor unit as the target indoor unit, and determine The target indoor unit is an indoor unit with heat exchange failure. The value range of the above-mentioned first preset threshold may be 1-4°C, and the value range of the above-mentioned second preset threshold may be 2-5°C. When the change of tube temperature is small, it indicates that the indoor unit has not effectively lowered or increased the indoor ambient temperature after running for a period of time, and it is determined that the heat exchange capacity of the indoor unit is weak.
通过将开机前后室内环境温度的变化量小于第一预设阈值，且盘管温度的变化量小于第二预设阈值的室内机作为存在换热失效的目标室内机，提升了故障检测的准确性。The accuracy of fault detection is improved by using the indoor units whose indoor ambient temperature change is less than the first preset threshold before and after starting up, and whose coil temperature change is less than the second preset threshold as the target indoor units with heat exchange failure .
为了验证上述目标室内机是否存在故障，本实施例提供了对目标室内机进行故障验证的实施方式，具体可参照如下步骤1)～步骤2)执行：In order to verify whether the above-mentioned target indoor unit has a fault, this embodiment provides an implementation mode for verifying the fault of the target indoor unit, which can be executed with reference to the following steps 1) to 2):
步骤1)：当确定目标室内机换热失效时，将目标室内机对应的目标计数器的计数结果加1。Step 1): When it is determined that the heat exchange of the target indoor unit fails, add 1 to the counting result of the target counter corresponding to the target indoor unit.
上述目标计数器的初值为0。当基于上述判断方式初步判断目标室内机换热失效时，基于目标计数器统计同一个目标室内机的换热失效次数。The initial value of the above target counter is 0. When the heat exchange failure of the target indoor unit is preliminarily judged based on the above judgment method, the number of heat exchange failures of the same target indoor unit is counted based on the target counter.
步骤2)：当目标计数器的计数结果大于等于预设次数，且目标室内机未被记录为故障误报时，控制多联空调对目标室内机进行故障验证。Step 2): When the counting result of the target counter is greater than or equal to the preset number of times, and the target indoor unit is not recorded as a fault false alarm, control the multi-connected air conditioner to perform fault verification on the target indoor unit.
为了避免对室内机故障的误检测，上述预设次数可以是2～5次，优选值为3次，即当基于上述第一温度差值及第二温度差值判断得到目标室内机存在换热失效的次数大于等于3次，且上述目标室内机目前并未被记录为出现故障误报的室内机时，控制多联空调对目标室内机进行故障验证。In order to avoid false detection of indoor unit faults, the preset number of times can be 2 to 5 times, and the preferred value is 3 times, that is, when it is judged based on the first temperature difference and the second temperature difference that there is heat exchange in the target indoor unit When the number of failures is greater than or equal to 3 times, and the above-mentioned target indoor unit is not currently recorded as an indoor unit with a false fault report, control the multi-connected air conditioner to perform fault verification on the target indoor unit.
通过统计目标室内机出现换热失效的次数，并在目标室内机出现换热失效的次数较多时，对目标室内机进行故障验证，在避免对室内机故障的误检测，提升了多联空调故障检测的可靠性。By counting the number of heat exchange failures of the target indoor unit, and verifying the failure of the target indoor unit when the number of heat exchange failures of the target indoor unit is large, it avoids false detection of indoor unit failures and improves the efficiency of multi-connected air conditioners. detection reliability.
为了进一步提升多联空调故障检测的准确度，本实施例提供了控制多联空调对目标室内机进行故障验证的实施方式，具体可参照如下步骤1～步骤2执行：In order to further improve the accuracy of multi-connected air conditioner fault detection, this embodiment provides an implementation mode of controlling the multi-connected air conditioner to perform fault verification on the target indoor unit. For details, refer to the following steps 1 to 2:
步骤1：当第二室内机达温停机，或第二室内机对应的室内环境温度与设定温度差值小于第三预设阈值时，控制第二室内机对应的第二膨胀阀关闭，控制目标室内机对应的目标膨胀阀打开至最大开度。Step 1: When the second indoor unit reaches the temperature and stops, or the difference between the indoor ambient temperature corresponding to the second indoor unit and the set temperature is less than the third preset threshold, control the second expansion valve corresponding to the second indoor unit to close, and control The target expansion valve corresponding to the target indoor unit is opened to the maximum opening.
上述第二室内机包括第一室内机中除目标室内机之外的全部室内机，即将开机状态的第一室内机中除换热失效的目标室内机之外的其他全部室内机记为第二室内机。The above-mentioned second indoor unit includes all indoor units in the first indoor unit except the target indoor unit, that is, all other indoor units in the first indoor unit in the power-on state except the target indoor unit with heat exchange failure are recorded as the second indoor unit. indoor unit.
当不存在换热失效的第二室内机处于达温停机状态时，或者，当第二室内机的室内环境温度与设定温度差值小于第三预设阈值(取值范围可以是0-3℃)时，即当第二室内机对应的室内环境温度接近其设定温度时，将各个不存在换热失效的第二室内机的电子膨胀阀记为第二膨胀阀，控制第二膨胀阀关闭，单独将目标室内机对应的目标膨胀阀打开至最大开度，以使目标室内机可以单独运行。When there is no second indoor unit with heat exchange failure in the shutdown state, or when the difference between the indoor ambient temperature and the set temperature of the second indoor unit is less than the third preset threshold (the value range can be 0-3 °C), that is, when the indoor ambient temperature corresponding to the second indoor unit is close to its set temperature, record the electronic expansion valves of the second indoor units without heat transfer failure as the second expansion valve, and control the second expansion valve Close, and separately open the target expansion valve corresponding to the target indoor unit to the maximum opening, so that the target indoor unit can operate independently.
步骤2：当目标膨胀阀以最大开度运行第三预设时长时，基于室内环境温度及盘管温度判断目标室内机是否存在换热故障，如果是，验证通过目标室内机存在换热故障。Step 2: When the target expansion valve operates at the maximum opening for the third preset time, judge whether the target indoor unit has a heat exchange failure based on the indoor ambient temperature and the coil temperature, and if so, verify that the target indoor unit has a heat exchange failure.
控制目标室内机对应的目标膨胀阀以最大开度运行第三预设时长，以使目标室内机对应的室内环境温度及盘管温度产生变化，上述第三预设时长的取值范围可以是25-50min。Control the target expansion valve corresponding to the target indoor unit to operate at the maximum opening for a third preset time period, so that the indoor ambient temperature and coil temperature corresponding to the target indoor unit will change. The value range of the third preset time period may be 25 -50min.
通过在第二室内机达温停机或室内环境温度接近设定温度时，控制第二室内机对应的电子膨胀阀关闭，避免了影响多联空调的正常工作，通过控制目标室内机单独运行，可以准确检测目标室内机是否存在换热故障，降低了故障误检率。By controlling the electronic expansion valve corresponding to the second indoor unit to close when the second indoor unit reaches the temperature and shuts down or the indoor ambient temperature is close to the set temperature, it avoids affecting the normal operation of the multi-connected air conditioner. By controlling the target indoor unit to run independently, it can Accurately detect whether the target indoor unit has a heat exchange fault, reducing the fault false detection rate.
在一种可行的实施方式中，获取目标室内机对应的当前的第三室内环境温度及第三盘管温度；计算第三室内环境温度与第一室内环境温度的第三温度差值，计算第三盘管温度与第一盘管温度的第四温度差值；当第三温度差值小于第一预设阈值，且第四温度差值小于第二预设阈值时，确定目标室内机存在换热故障。In a feasible implementation manner, the current third indoor ambient temperature and the third coil temperature corresponding to the target indoor unit are obtained; the third temperature difference between the third indoor ambient temperature and the first indoor ambient temperature is calculated, and the third indoor ambient temperature is calculated. The fourth temperature difference between the third coil temperature and the first coil temperature; when the third temperature difference is less than the first preset threshold, and the fourth temperature difference is less than the second preset threshold, it is determined that the target indoor unit has a replacement Thermal failure.
当目标室内机单独运行第三预设时长时，获取目标室内机对应的当前的室内环境温度(即目标室内机所在环境的室内环境温度)及盘管温度，记为第三室内环境温度及第三盘管温度，计算第三室内环境温度与第一室内环境温度的差值的绝对值，得到第三温度差值，计算第三盘管温度与第一盘管温度的差值的绝对值，得到第四温度差值。When the target indoor unit runs alone for the third preset time, the current indoor ambient temperature corresponding to the target indoor unit (that is, the indoor ambient temperature of the environment where the target indoor unit is located) and the coil temperature are obtained, and recorded as the third indoor ambient temperature and the second indoor ambient temperature. Three coil temperatures, calculate the absolute value of the difference between the third indoor ambient temperature and the first indoor ambient temperature, obtain the third temperature difference, calculate the absolute value of the difference between the third coil temperature and the first coil temperature, A fourth temperature difference is obtained.
当上述第三温度差值小于上述第一预设阈值，且上述第四温度差值小于上述第二预设阈值时，目标室内机仍然处于换热失效状态，确定目标室内机存在换热故障，验证通过目标室内机存在换热故障，目标室内机可能存在管路堵塞的问题。通过在目标室内机单独运行时，再次基于室内环境温度变化值及盘管温度变化值判断目标室内机是否存在换热故障，可以准确识别目标室内机是否存在换热故障，提升了故障检测的准确度。When the third temperature difference is smaller than the first preset threshold and the fourth temperature difference is smaller than the second preset threshold, the target indoor unit is still in a heat exchange failure state, and it is determined that the target indoor unit has a heat exchange failure, After verification, the target indoor unit has a heat exchange failure, and the target indoor unit may have a pipeline blockage problem. By judging whether the target indoor unit has a heat exchange failure based on the indoor environment temperature change value and the coil temperature change value again when the target indoor unit is running alone, it can accurately identify whether the target indoor unit has a heat exchange failure, which improves the accuracy of fault detection Spend.
在一种可行的实施方式中，上述多联空调故障检测方法还包括：当目标室内机不存在换热故障时，记录目标室内机为故障误报。在对目标室内机的故障验证过程中，当不满足第三温度差值小于第一预设阈值，且第四温度差值小于第二预设阈值时，确定目标室内机不存在换热故障，无需控制压缩机报故障，判断为运行温度条件接近极限，引起误报，将目标室内机记录为存在故障误报。In a feasible implementation manner, the above multi-connected air conditioner failure detection method further includes: when the target indoor unit does not have a heat exchange failure, recording the target indoor unit as a false alarm of failure. During the fault verification process of the target indoor unit, when the third temperature difference is not less than the first preset threshold and the fourth temperature difference is less than the second preset threshold, it is determined that the target indoor unit does not have a heat exchange fault, There is no need to control the compressor to report a fault, it is judged that the operating temperature condition is close to the limit, causing a false alarm, and the target indoor unit is recorded as a fault false alarm.
在一种可行的实施方式中，上述多联空调故障检测方法还包括：当目标室内机存在换热故障时，控制压缩机报低压保护故障，当接收目标室内机检修完成的指令时，控制目标计数器清零。In a feasible implementation, the above multi-connected air conditioner fault detection method further includes: when the target indoor unit has a heat exchange fault, controlling the compressor to report a low-pressure protection fault; The counter is cleared.
当确定目标室内机存在换热故障时，控制压缩机发出故障报警，以提示检修人员对目标室内机进行及时检修，当检修人员完成对目标室内机的检修时，向多联空调输入目标室内机检修完成的指令，当接收到用户输入的目标室内机检修完成的指令时，控制目标室内机对应的目标计数器清零，即将统计的目标室内机换热失效次数清零。When it is determined that the target indoor unit has a heat exchange failure, the control compressor sends out a fault alarm to prompt the maintenance personnel to perform timely maintenance on the target indoor unit. When the maintenance personnel complete the maintenance of the target indoor unit, input the target indoor unit When the instruction of completion of maintenance is received from the user, the target counter corresponding to the target indoor unit is controlled to be cleared, that is, the counted number of heat exchange failures of the target indoor unit is cleared to zero.
本实施例提供的上述多联空调故障检测方法，通过在多联空调开机运行一段时间后，根据开启前后的室内环境温度及盘管温度变化情况判断室内机的换热能力，可以筛选出换热能力微弱的室内机，通过对换热能力微弱的室内机单独故障验证，可以准确识别多联空调的室内机故障，在空调机组未出现明显异常情况下，实现了对多联空调的故障提前识别。The above multi-connected air conditioner fault detection method provided in this embodiment, after the multi-connected air conditioner has been turned on for a period of time, judges the heat exchange capacity of the indoor unit according to the indoor ambient temperature and coil temperature changes before and after the start-up, and can screen out the heat transfer Indoor units with weak capacity can accurately identify the faults of indoor units of multi-connected air conditioners by verifying the individual faults of indoor units with weak heat transfer capabilities. In the case of no obvious abnormalities in the air-conditioning units, early identification of faults in multi-connected air conditioners can be realized .
对应于上述实施例提供的多联空调故障检测方法，本发明实施例提供了应用上述多联空调故障检测方法对多联机室内机管路进行堵塞判断的实例，参见如图2所示的多联机室内机管路堵塞判断流程图，具体可参照如下步骤S201～步骤S206执行：Corresponding to the multi-connected air conditioner fault detection method provided in the above-mentioned embodiments, the embodiment of the present invention provides an example of applying the above-mentioned multi-connected air-conditioner fault detection method to judge the blockage of the multi-connected indoor unit pipeline, see the multi-connected air conditioner shown in Figure 2 The flow chart for judging blockage of indoor unit pipelines can be executed with reference to the following steps S201 to S206:
步骤S201：当多联空调开启时，记录各开机室内机膨胀阀打开前的室内环境温度Ta0及盘管温度Tg0。Step S201: When the multi-connected air conditioner is turned on, record the indoor ambient temperature Ta0 and the coil temperature Tg0 before the expansion valve of each indoor unit is turned on.
步骤S202：当多联空调运行第一预设时长时，记录当前的室内环境温度Ta1及盘管温度Tg1。Step S202: Record the current indoor ambient temperature Ta1 and coil temperature Tg1 when the multi-connected air conditioner is running for the first preset time.
步骤S203：判断是否存在目标室内机满足|Ta0-Ta1|<A，且|Tg0-Tg1|<B。如果是，执行步骤S204。Step S203: Determine whether there is a target indoor unit that satisfies |Ta0-Ta1|<A, and |Tg0-Tg1|<B. If yes, execute step S204.
上述A为第一预设阈值，取值范围为1-4℃，B为第二预设阈值，取值范围为2-5℃。The above-mentioned A is the first preset threshold with a value range of 1-4°C, and B is the second preset threshold with a value range of 2-5°C.
如果各开机室内机均不满足|Ta0-Ta1|<A，|Tg0-Tg1|<B，每间隔第一预设时长，记录当前的室内环境温度Ta1及盘管温度Tg1，并判断目前是否存在满足|Ta0-Ta1|<A，且|Tg0-Tg1|<B的换热失效的目标室内机。If all the indoor units that start up do not satisfy |Ta0-Ta1|<A, |Tg0-Tg1|<B, record the current indoor ambient temperature Ta1 and coil temperature Tg1 at each interval of the first preset time, and judge whether there is The target indoor unit that satisfies |Ta0-Ta1|<A, and |Tg0-Tg1|<B heat exchange failure.
步骤S204：确定该目标室内机换热失效，记录目标室内机地址，统计目标室内机的换热失效次数。Step S204: Determine the heat exchange failure of the target indoor unit, record the address of the target indoor unit, and count the heat exchange failure times of the target indoor unit.
步骤S205：当目标室内机的换热失效次数大于等于3时，单独开启目标室内机的膨胀阀运行第三预设时长，判断目标室内机是否出现换热故障。Step S205: When the number of heat exchange failures of the target indoor unit is greater than or equal to 3, independently open the expansion valve of the target indoor unit and run for a third preset time to determine whether the target indoor unit has a heat exchange failure.
在其余内机到温停机后，或接近设定温度时，关闭其他室内机对应的电子膨胀阀，单独开启目标室内机对应的目标膨胀阀，并将目标室内机对应的目标膨胀阀全开，运行第三预设时长t(取值25-50min)，再次判断目标室内机是否仍然存在换热失效，如果是，确定目标室内机存在换热故障。After the remaining indoor units reach temperature and stop, or close to the set temperature, close the electronic expansion valves corresponding to other indoor units, open the target expansion valves corresponding to the target indoor units separately, and fully open the target expansion valves corresponding to the target indoor units. Run for the third preset time period t (value 25-50min), judge again whether the target indoor unit still has a heat exchange failure, and if so, determine that the target indoor unit has a heat exchange failure.
当目标室内机的换热失效次数小于3时，继续返回执行上述步骤S202，以周期性判断各开机室内机中是否存在换热失效的目标室内机。When the number of heat exchange failures of the target indoor unit is less than 3, continue to return to the above step S202 to periodically determine whether there is a target indoor unit with heat exchange failure among the indoor units that are turned on.
步骤S206：当目标室内机出现换热故障时，发出目标室内机故障提示。Step S206: When the target indoor unit has a heat exchange failure, send out a failure prompt of the target indoor unit.
若目标室内机出现换热故障，外机压缩机报低压保护故障，判断内机堵塞，后台通知售后检修，完成检修后清除目标室内机的换热失效次数。If the target indoor unit has a heat exchange failure, the outdoor unit compressor will report a low-voltage protection failure, and the indoor unit will be judged to be blocked. The background will notify the after-sales maintenance. After the maintenance is completed, the number of heat exchange failures of the target indoor unit will be cleared.
若目标室内机未出现换热故障，判断为运行温度条件接近极限，引起误报，记录目标室内机为故障误报，不再对目标室内机进行换热失效判断。If the target indoor unit does not have a heat exchange failure, it is judged that the operating temperature condition is close to the limit, causing a false alarm, and the target indoor unit is recorded as a fault false alarm, and no heat exchange failure judgment is performed on the target indoor unit.
对应于上述实施例提供的多联空调故障检测方法，本发明实施例提供了一种多联空调故障检测装置，该装置可以应用于多联空调，参见如图3所示的多联空调故障检测装置结构示意图，该装置包括以下模块：Corresponding to the multi-connected air conditioner fault detection method provided in the above embodiment, the embodiment of the present invention provides a multi-connected air-conditioner fault detection device, which can be applied to a multi-connected air-conditioner, see the multi-connected air-conditioner fault detection shown in Figure 3 Schematic diagram of the device structure, the device includes the following modules:
监测模块31，用于当多联空调开启时，监测室内环境温度，监测第一室内机的盘管温度；其中，第一室内机为处于开机状态的室内机。The monitoring module 31 is used to monitor the indoor ambient temperature and the coil temperature of the first indoor unit when the multi-connected air conditioner is turned on; wherein the first indoor unit is an indoor unit in a power-on state.
判断模块32，用于当第一室内机运行第一预设时长时，基于室内环境温度及盘管温度判断第一室内机中是否存在换热失效的目标室内机。The judging module 32 is configured to judge whether there is a target indoor unit with heat exchange failure among the first indoor units based on the indoor ambient temperature and the coil temperature when the first indoor unit is running for a first preset time.
验证模块33，用于在第一室内机中存在换热失效的目标室内机时，对目标室内机进行故障验证，当故障验证通过时，确认目标室内机存在故障。The verification module 33 is configured to perform fault verification on the target indoor unit when there is a target indoor unit with heat exchange failure among the first indoor units, and confirm that the target indoor unit has a fault when the fault verification is passed.
本实施例提供的上述多联空调故障检测装置，在多联空调运行过程中，通过根据各运行状态下的室内机的室内环境温度及盘管温度判断是否存在换热效率效果较差的目标室内机，并对换热效果较差的目标室内机进行进一步故障验证，可以准确检测出存在故障的室内机，提升了多联空调故障检测的准确性。The multi-connected air conditioner fault detection device provided in this embodiment judges whether there is a target room with poor heat exchange efficiency based on the indoor ambient temperature and coil temperature of the indoor unit in each operating state during the operation of the multi-connected air conditioner. Units, and further fault verification of target indoor units with poor heat transfer effects can accurately detect faulty indoor units, improving the accuracy of multi-connected air conditioner fault detection.
在一种实施方式中，上述判断模块32，进一步用于获取各膨胀阀开启前的第一室内机对应的第一室内环境温度及第一盘管温度；当第一室内机运行第一预设时长时，每间隔第二预设时长获取第一室内机当前的第二室内环境温度及第二盘管温度，计算第一室内环境温度与第二室内环境温度的第一温度差值，计算第一盘管温度与第二盘管温度的第二温度差值；基于第一温度差值及第二温度差值判断第一室内机中是否存在换热失效的目标室内机。In one embodiment, the judgment module 32 is further used to obtain the first indoor ambient temperature and the first coil temperature corresponding to the first indoor unit before each expansion valve is opened; when the first indoor unit operates the first preset When the time is long, the current second indoor ambient temperature and the second coil temperature of the first indoor unit are obtained every second preset time interval, the first temperature difference between the first indoor ambient temperature and the second indoor ambient temperature is calculated, and the second indoor ambient temperature is calculated. A second temperature difference between the first coil temperature and the second coil temperature; based on the first temperature difference and the second temperature difference, it is determined whether there is a target indoor unit with heat exchange failure among the first indoor units.
在一种实施方式中，上述判断模块32，进一步用于将第一室内机中满足第一温度差值小于第一预设阈值，且第二温度差值小于第二预设阈值的室内机作为目标室内机，确定目标室内机换热失效。In one embodiment, the above-mentioned judging module 32 is further configured to use the indoor units satisfying that the first temperature difference is less than the first preset threshold and the second temperature difference is less than the second preset threshold among the first indoor units as Target indoor unit, determine the heat transfer failure of the target indoor unit.
在一种实施方式中，上述验证模块33，进一步用于当确定目标室内机换热失效时，将目标室内机对应的目标计数器的计数结果加1；其中，目标计数器的初值为0；当目标计数器的计数结果大于等于预设次数，且目标室内机未被记录为故障误报时，控制多联空调对目标室内机进行故障验证。In one embodiment, the above verification module 33 is further configured to add 1 to the counting result of the target counter corresponding to the target indoor unit when it is determined that the target indoor unit fails to exchange heat; wherein, the initial value of the target counter is 0; when When the counting result of the target counter is greater than or equal to the preset number of times, and the target indoor unit is not recorded as a fault false alarm, the multi-connected air conditioner is controlled to perform fault verification on the target indoor unit.
在一种实施方式中，上述验证模块33，进一步用于当第二室内机达温停机，或第二室内机对应的室内环境温度与设定温度差值小于第三预设阈值时，控制第二室内机对应的第二膨胀阀关闭，控制目标室内机对应的目标膨胀阀打开至最大开度；其中，第二室内机包括第一室内机中除目标室内机之外的全部室内机；当目标膨胀阀以最大开度运行第三预设时长时，基于室内环境温度及盘管温度判断目标室内机是否存在换热故障，如果是，验证通过目标室内机存在换热故障。In one embodiment, the verification module 33 is further configured to control the second indoor unit to shut down when the second indoor unit reaches temperature, or the difference between the indoor ambient temperature corresponding to the second indoor unit and the set temperature is less than a third preset threshold. The second expansion valve corresponding to the second indoor unit is closed, and the target expansion valve corresponding to the target indoor unit is controlled to open to the maximum opening; wherein, the second indoor unit includes all indoor units in the first indoor unit except the target indoor unit; when When the target expansion valve operates at the maximum opening for the third preset time, judge whether the target indoor unit has a heat exchange failure based on the indoor ambient temperature and the coil temperature, and if so, verify that the target indoor unit has a heat exchange failure.
在一种实施方式中，上述验证模块33，进一步用于获取目标室内机对应的当前的第三室内环境温度及第三盘管温度；计算第三室内环境温度与第一室内环境温度的第三温度差值，计算第三盘管温度与第一盘管温度的第四温度差值；当第三温度差值小于第一预设阈值，且第四温度差值小于第二预设阈值时，确定目标室内机存在换热故障。In one embodiment, the verification module 33 is further configured to obtain the current third indoor ambient temperature and the third coil temperature corresponding to the target indoor unit; calculate the third indoor ambient temperature and the first indoor ambient temperature. temperature difference, calculating the fourth temperature difference between the third coil temperature and the first coil temperature; when the third temperature difference is less than the first preset threshold, and the fourth temperature difference is less than the second preset threshold, Determine that the target indoor unit has a heat exchange failure.
在一种实施方式中，上述装置还包括：In one embodiment, the above-mentioned device also includes:
记录模块，用于当目标室内机不存在换热故障时，记录目标室内机为故障误报。The recording module is used to record that the target indoor unit is a false alarm when there is no heat exchange failure in the target indoor unit.
报警模块，用于当目标室内机存在换热故障时，控制压缩机报低压保护故障，当接收目标室内机检修完成的指令时，控制目标计数器清零。The alarm module is used to control the compressor to report a low-voltage protection fault when the target indoor unit has a heat exchange failure, and to control the target counter to be cleared when receiving an instruction that the target indoor unit is overhauled.
本实施例提供的上述多联空调故障检测装置，通过在多联空调开机运行一段时间后，根据开启前后的室内环境温度及盘管温度变化情况判断室内机的换热能力，可以筛选出换热能力微弱的室内机，通过对换热能力微弱的室内机单独故障验证，可以准确识别多联空调的室内机故障，在空调机组未出现明显异常情况下，实现了对多联空调的故障提前识别。The above multi-connected air conditioner fault detection device provided in this embodiment judges the heat exchange capacity of the indoor unit according to the indoor ambient temperature and coil temperature changes before and after the start-up of the multi-connected air conditioner after the multi-connected air conditioner has been turned on for a period of time, and can screen out the heat transfer capacity. Indoor units with weak capacity can accurately identify the faults of indoor units of multi-connected air conditioners by verifying the individual faults of indoor units with weak heat transfer capabilities. In the case of no obvious abnormalities in the air-conditioning units, early identification of faults in multi-connected air conditioners can be realized .
对应于上述实施例提供的多联空调故障检测方法，本实施例提供了一种多联空调，该多联空调包括存储有计算机程序的计算机可读存储介质和处理器，计算机程序被处理器读取并运行时，实现上述实施例提供的多联空调故障检测方法。Corresponding to the multi-connected air conditioner fault detection method provided in the above embodiment, this embodiment provides a multi-connected air conditioner, the multi-connected air conditioner includes a computer-readable storage medium storing a computer program and a processor, and the computer program is read by the processor When fetching and running, realize the multi-connected air conditioner fault detection method provided by the above embodiment.
本实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述多联空调故障检测方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等。This embodiment also provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the above-mentioned embodiment of the multi-connected air conditioner fault detection method is implemented, and the same can be achieved. To avoid repetition, the technical effects will not be repeated here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.
当然，本领域技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程度来指令控制装置来完成，所述的程序可存储于一计算机可读取的存储介质中，所述程序在执行时可包括如上述各方法实施例的流程，其中所述的存储介质可为存储器、磁盘、光盘等。Of course, those skilled in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be completed by instructing the control device through a computer program, and the program can be stored in a computer-readable storage medium, so When the program is executed, it may include the processes of the above method embodiments, wherein the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的多联空调故障检测装置和多联空调而言，由于其与实施例公开的多联空调故障检测方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the multi-connected air conditioner fault detection device and the multi-connected air conditioner disclosed in the embodiment, since it corresponds to the multi-connected air conditioner fault detection method disclosed in the embodiment, the description is relatively simple. For related details, please refer to the description in the method section.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.
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