CN107166638B - Fault detection method and device of temperature sensor and multi-connected air conditioning system - Google Patents
Fault detection method and device of temperature sensor and multi-connected air conditioning system Download PDFInfo
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- CN107166638B CN107166638B CN201710320917.3A CN201710320917A CN107166638B CN 107166638 B CN107166638 B CN 107166638B CN 201710320917 A CN201710320917 A CN 201710320917A CN 107166638 B CN107166638 B CN 107166638B
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Abstract
The invention provides a fault detection method and a fault detection device of a temperature sensor and a multi-connected air conditioning system, wherein the fault detection method of the temperature sensor comprises the following steps: when the indoor air conditioner is in a temperature adjusting operation mode, acquiring a temperature value sensed by a temperature sensor according to a preset acquisition frequency; and when the collection quantity reaches a preset quantity threshold value, determining whether the temperature sensor fails or not according to the collected multiple temperature values, wherein the temperature sensor is a room temperature sensor and/or a pipe temperature sensor. According to the technical scheme, when the temperature sensor fault is detected, the temperature sensor can be maintained and replaced in time, and the probability of abnormal output of the outdoor air conditioner is reduced, so that the service life of the air conditioning system can be prolonged, and the comfort requirement of a user is improved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a fault detection method of a temperature sensor, a fault detection device of the temperature sensor and a multi-connected air conditioning system.
Background
In the related art, in the multi-connected air conditioning system, the indoor air conditioner uses the temperature sensor to detect the temperature of the evaporator and feeds the temperature back to the outdoor air conditioner, and the outdoor air conditioner determines the output according to the evaporator temperature fed back by the indoor air conditioner, so the temperature detected by the temperature sensor of the indoor air conditioner plays an important role in the normal operation of the air conditioning system.
When the indoor air conditioner is in use, the temperature sensor can bear severe use states such as high temperature and condensate water soaking, the temperature sensor is easy to lose effectiveness, temperature deviation is detected, if the temperature collected by the temperature sensor of the indoor air conditioner with deviation is fed back to the outdoor air conditioner, the condition that the output of the outdoor air conditioner is larger or smaller can be generated, and the normal operation of a system is influenced.
Disclosure of Invention
In order to solve at least one of the above technical problems, it is an object of the present invention to provide a fault detection method of a temperature sensor.
Another object of the present invention is to provide a fault detection apparatus of a temperature sensor.
Another object of the present invention is to provide a multi-connected air conditioning system.
In order to achieve the above object, an embodiment of a first aspect of the present invention proposes a fault detection method for a temperature sensor, including: when the indoor air conditioner is in a temperature adjusting operation mode, acquiring a temperature value sensed by a temperature sensor according to a preset acquisition frequency; and when the collection quantity reaches a preset quantity threshold value, determining whether the temperature sensor fails or not according to the collected multiple temperature values, wherein the temperature sensor is a room temperature sensor and/or a pipe temperature sensor.
In this technical scheme, when indoor air conditioner is in the mode of operation that adjusts the temperature, under normal operating condition, the temperature value that temperature sensor that sets up on indoor air conditioner gathered at different moments is different, through gathering the temperature value that temperature sensor sensed according to predetermineeing the collection frequency, after gathering the temperature value of appointed quantity (being preset quantity threshold value), whether temperature sensor breaks down is confirmed according to a plurality of temperature values of gathering, with when detecting temperature sensor trouble, can in time maintain and change, reduce outdoor air conditioner output unusual probability, thereby can prolong air conditioning system's life, promote user's travelling comfort demand.
Wherein, collection frequency and collection quantity can be confirmed according to refrigeration efficiency, for example, the cooling process is accomplished in 3 minutes, can be confirmed collection frequency to be 1/6 seconds, gather 30 times in 3 minutes.
In addition, the tube temperature sensor can be specifically a temperature sensing bulb, the temperature sensing bulb is one of the components of the thermal expansion valve, the temperature sensing bulb is usually tied on an air outlet pipe of the evaporator, and the temperature information is converted into pressure information and then transmitted to the valve body, so that the flow rate of the valve body can be adjusted.
In the multi-connected air conditioning system, an outdoor air conditioner can adopt an air cooling heat exchange mode, an indoor air conditioner adopts a heat exchanger for heat exchange to realize refrigeration or heating, wherein the heat exchanger is an evaporator or a condenser, a room temperature sensor is arranged at a designated position of the indoor air conditioner and used for detecting the temperature of an indoor environment, a first tube temperature sensor is arranged at an inlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the inlet temperature of the evaporator (or the condenser), and/or a second tube temperature sensor is arranged in the middle of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the middle temperature of the evaporator (or the condenser); and/or the third tube temperature sensor is arranged at the outlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the outlet temperature of the evaporator (or the condenser), when the preset collection frequency is adopted to collect the temperature values of the preset number of threshold values, the collected temperature values are analyzed through the preset analysis model, and when the temperature sensor is determined to be in fault, the fault position is conveniently checked.
Whether the temperature sensor fails or not is determined according to the collected temperature values, analysis can be performed only according to the temperature values to determine whether the temperature sensor fails or not, and comparison with a preset threshold value or a preset range can be performed to determine whether the temperature sensor fails or not.
Whether the temperature sensor fails or not is determined according to the collected temperature values, the temperature values collected by a single temperature sensor can be analyzed, and the temperature values respectively collected by at least two temperature sensors can be compared to determine whether the temperature sensor fails or not.
In addition, the fault detection method of the temperature sensor in the above embodiment provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, when the collection time reaches a preset time threshold, determining whether the temperature sensor has a fault according to the collected multiple temperature values, specifically including the following steps: detecting whether the difference value of any two temperature values in a plurality of temperature values sensed by any one temperature sensor is smaller than or equal to a preset difference threshold value or not; and when the detected difference is smaller than or equal to the preset difference threshold, determining that any one temperature sensor fails.
In the technical scheme, whether a single temperature sensor fails is determined by analyzing a plurality of temperature values acquired by the single temperature sensor, specifically, the temperature difference value of any two of the temperature values can be detected to be less than or equal to a preset difference threshold value, when the temperature difference value of any two is detected to be less than or equal to the preset difference threshold value, the fact that the actual temperature change value is greater than the preset temperature difference threshold value is shown in a time interval when the temperature difference value of any two is acquired, but the temperature sensor is not correctly detected, the temperature sensor fails, the fault detection mode and the processing engineering are simple, and the fault detection accuracy is high.
Further, when the preset temperature difference threshold is 0, that is, when it is detected that the plurality of temperature values are equal, that is, when the indoor air conditioner is in the temperature-adjusting operation mode, the temperature detected by the temperature sensor does not change, that is, it can be indicated that the single temperature sensor is faulty.
In addition, in the cooling mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is less than or equal to the temperature value acquired in the following, and in the heating mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is greater than or equal to the temperature value acquired in the following.
Specifically, the temperature sensor may be a room temperature sensor, and may also be a first pipe temperature sensor, a second pipe temperature sensor, or a third pipe temperature sensor.
In any of the above technical solutions, preferably, the method further includes: any one temperature sensor is a room temperature sensor, and when the difference value detected to be greater than the preset difference value threshold value is detected, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired; when the current operation mode is a refrigeration mode, detecting whether the first temperature value is less than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is less than or equal to the second temperature value; or when the current operation mode is the heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has faults when the first temperature value is greater than or equal to the second temperature value.
In the technical scheme, when the difference value is detected to be larger than the preset difference value threshold value, it is indicated that the abnormality of the room temperature sensor is not detected by adopting the detection mode, at the moment, the first temperature value of the room temperature sensor and the second temperature value of the pipe temperature sensor can be synchronously acquired, and in the cooling mode, the first temperature value in the normal operation state should be larger than the second temperature value, so that when the first temperature value is detected to be smaller than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and in the heating mode, the first temperature value in the normal state should be smaller than the second temperature value, so that when the first temperature value is detected to be larger than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and the fault detection of the pipe temperature sensor is realized.
In addition, when the normal operation of the pipe temperature sensor is detected, whether the room temperature sensor is in failure or not may be detected.
In any of the above technical solutions, preferably, when the acquisition time reaches a preset time threshold, determining whether the temperature sensor has a fault according to a plurality of acquired temperature values, specifically including the following steps: determining a preset temperature interval corresponding to the temperature adjusting operation mode; detecting whether any temperature value exists in a plurality of temperature values acquired by a room temperature sensor, wherein any temperature value does not belong to a preset temperature interval; and when any temperature value which does not belong to the preset temperature interval exists, determining that the room temperature sensor has a fault.
In the technical scheme, the preset temperature interval corresponding to the current operation mode is determined according to the current operation mode of the indoor air conditioner, so that when a temperature value which does not belong to the preset temperature interval exists in a plurality of temperature values acquired by the room temperature sensor, the working abnormality of the room temperature sensor is indicated, namely the fault of the room temperature sensor is determined, the fault detection of the room temperature sensor is realized, and the detection mode is simple.
The preset temperature interval is a temperature interval that room temperature can reach, and specifically may be, in the cooling mode, the preset temperature interval is greater than or equal to 15 ℃ and less than or equal to 55 ℃, and in the heating mode, the preset temperature interval is greater than or equal to-15 ℃ and less than or equal to 35 ℃.
In addition, whether a temperature value which does not belong to a preset temperature interval exists in a plurality of temperature values acquired by the pipe temperature sensor can be detected to determine whether the pipe temperature sensor is in fault.
In any of the above technical solutions, preferably, the method further includes: generating first alarm prompt information when the room temperature sensor is determined to be in fault; and/or generating second alarm prompt information when the pipe temperature sensor is determined to be in fault so as to prompt the fault of the user through the alarm information.
In the technical scheme, when the temperature sensor is determined to have a fault, the alarm prompt information is generated, specifically, when the room temperature sensor has a fault, the first alarm prompt information is generated, when the tube temperature creates an Angel fault, the second alarm prompt information is generated, on one hand, the temperature sensor which specifically generates the fault can be prompted to facilitate the maintenance of a user, on the other hand, the temperature sensor generates the fault by prompting the user, the user can timely troubleshoot and maintain the fault, the probability that the fault of the temperature sensor affects the service life of the system is reduced, and the use experience of the user is improved.
An embodiment of the second aspect of the present invention provides a fault detection apparatus for a temperature sensor, including: the temperature sensor comprises a collecting unit, a temperature sensor and a temperature sensor, wherein the collecting unit is used for collecting a temperature value sensed by the temperature sensor according to a preset collecting frequency when the indoor air conditioner is in a temperature adjusting operation mode; and the determining unit is used for determining whether the temperature sensor fails or not according to the plurality of acquired temperature values when the acquired number reaches a preset number threshold, wherein the temperature sensor is a room temperature sensor and/or a pipe temperature sensor.
In this technical scheme, when indoor air conditioner is in the mode of operation that adjusts the temperature, under normal operating condition, the temperature value that temperature sensor that sets up on indoor air conditioner gathered at different moments is different, through gathering the temperature value that temperature sensor sensed according to predetermineeing the collection frequency, after gathering the temperature value of appointed quantity (being preset quantity threshold value), whether temperature sensor breaks down is confirmed according to a plurality of temperature values of gathering, with when detecting temperature sensor trouble, can in time maintain and change, reduce outdoor air conditioner output unusual probability, thereby can prolong air conditioning system's life, promote user's travelling comfort demand.
Wherein, collection frequency and collection quantity can be confirmed according to refrigeration efficiency, for example, the cooling process is accomplished in 3 minutes, can be confirmed collection frequency to be 1/6 seconds, gather 30 times in 3 minutes.
In addition, the tube temperature sensor can be specifically a temperature sensing bulb, the temperature sensing bulb is one of the components of the thermal expansion valve, the temperature sensing bulb is usually tied on an air outlet pipe of the evaporator, and the temperature information is converted into pressure information and then transmitted to the valve body, so that the flow rate of the valve body can be adjusted.
In the multi-connected air conditioning system, an outdoor air conditioner can adopt an air cooling heat exchange mode, an indoor air conditioner adopts a heat exchanger for heat exchange to realize refrigeration or heating, wherein the heat exchanger is an evaporator or a condenser, a room temperature sensor is arranged at a designated position of the indoor air conditioner and used for detecting the temperature of an indoor environment, a first tube temperature sensor is arranged at an inlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the inlet temperature of the evaporator (or the condenser), and/or a second tube temperature sensor is arranged in the middle of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the middle temperature of the evaporator (or the condenser); and/or the third tube temperature sensor is arranged at the outlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the outlet temperature of the evaporator (or the condenser), when the preset collection frequency is adopted to collect the temperature values of the preset number of threshold values, the collected temperature values are analyzed through the preset analysis model, and when the temperature sensor is determined to be in fault, the fault position is conveniently checked.
Whether the temperature sensor fails or not is determined according to the collected temperature values, analysis can be performed only according to the temperature values to determine whether the temperature sensor fails or not, and comparison with a preset threshold value or a preset range can be performed to determine whether the temperature sensor fails or not.
Whether the temperature sensor fails or not is determined according to the collected temperature values, the temperature values collected by a single temperature sensor can be analyzed, and the temperature values respectively collected by at least two temperature sensors can be compared to determine whether the temperature sensor fails or not.
In any of the above technical solutions, preferably, the method further includes: the detection unit is used for detecting whether the difference value of any two temperature values in the plurality of temperature values is smaller than or equal to a preset difference threshold value; the determination unit is further configured to: and when the detected difference is smaller than or equal to the preset difference threshold, determining that any one temperature sensor fails.
In the technical scheme, whether a single temperature sensor fails is determined by analyzing a plurality of temperature values acquired by the single temperature sensor, specifically, the temperature difference value of any two of the temperature values can be detected to be less than or equal to a preset difference threshold value, when the temperature difference value of any two is detected to be less than or equal to the preset difference threshold value, the fact that the actual temperature change value is greater than the preset temperature difference threshold value is shown in a time interval when the temperature difference value of any two is acquired, but the temperature sensor is not correctly detected, the temperature sensor fails, the fault detection mode and the processing engineering are simple, and the fault detection accuracy is high.
Further, when the preset temperature difference threshold is 0, that is, when it is detected that the plurality of temperature values are equal, that is, when the indoor air conditioner is in the temperature-adjusting operation mode, the temperature detected by the temperature sensor does not change, that is, it can be indicated that the single temperature sensor is faulty.
In addition, in the cooling mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is less than or equal to the temperature value acquired in the following, and in the heating mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is greater than or equal to the temperature value acquired in the following.
Specifically, the temperature sensor may be a room temperature sensor, and may also be a first pipe temperature sensor, a second pipe temperature sensor, or a third pipe temperature sensor.
In any of the above technical solutions, preferably, the acquisition unit is further configured to: any one temperature sensor is a room temperature sensor, and when the difference value detected to be greater than the preset difference value threshold value is detected, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired; the detection unit is further configured to: when the current operation mode is a refrigeration mode, detecting whether the first temperature value is less than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is less than or equal to the second temperature value; or when the current operation mode is the heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has faults when the first temperature value is greater than or equal to the second temperature value.
In the technical scheme, when the difference value is detected to be larger than the preset difference value threshold value, it is indicated that the abnormality of the room temperature sensor is not detected by adopting the detection mode, at the moment, the first temperature value of the room temperature sensor and the second temperature value of the pipe temperature sensor can be synchronously acquired, and in the cooling mode, the first temperature value in the normal operation state should be larger than the second temperature value, so that when the first temperature value is detected to be smaller than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and in the heating mode, the first temperature value in the normal state should be smaller than the second temperature value, so that when the first temperature value is detected to be larger than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and the fault detection of the pipe temperature sensor is realized.
In addition, when the normal operation of the pipe temperature sensor is detected, whether the room temperature sensor is in failure or not may be detected.
In any of the above technical solutions, preferably, the determining unit is further configured to: determining a preset temperature interval corresponding to the temperature adjusting operation mode; the detection unit is further configured to: detecting whether any temperature value exists in a plurality of temperature values acquired by a room temperature sensor, wherein any temperature value does not belong to a preset temperature interval; the determination unit is further configured to: and when any temperature value which does not belong to the preset temperature interval exists, determining that the room temperature sensor has a fault.
In the technical scheme, the preset temperature interval corresponding to the current operation mode is determined according to the current operation mode of the indoor air conditioner, so that when a temperature value which does not belong to the preset temperature interval exists in a plurality of temperature values acquired by the room temperature sensor, the working abnormality of the room temperature sensor is indicated, namely the fault of the room temperature sensor is determined, the fault detection of the room temperature sensor is realized, and the detection mode is simple.
The preset temperature interval is a temperature interval that room temperature can reach, and specifically may be, in the cooling mode, the preset temperature interval is greater than or equal to 15 ℃ and less than or equal to 55 ℃, and in the heating mode, the preset temperature interval is greater than or equal to-15 ℃ and less than or equal to 35 ℃.
In addition, whether a temperature value which does not belong to a preset temperature interval exists in a plurality of temperature values acquired by the pipe temperature sensor can be detected to determine whether the pipe temperature sensor is in fault.
In any of the above technical solutions, preferably, the method further includes: the alarm unit is used for generating first alarm prompt information when the room temperature sensor is determined to be in fault; the alarm unit is further configured to: and when the pipe temperature sensor is determined to be in fault, generating second alarm prompt information so as to prompt the fault of the user through the alarm information.
In the technical scheme, when the temperature sensor is determined to have a fault, the alarm prompt information is generated, specifically, when the room temperature sensor has a fault, the first alarm prompt information is generated, when the tube temperature creates an Angel fault, the second alarm prompt information is generated, on one hand, the temperature sensor which specifically generates the fault can be prompted to facilitate the maintenance of a user, on the other hand, the temperature sensor generates the fault by prompting the user, the user can timely troubleshoot and maintain the fault, the probability that the fault of the temperature sensor affects the service life of the system is reduced, and the use experience of the user is improved.
Embodiments of a third aspect of the present invention provide a multi-connected air conditioning system, comprising at least one outdoor air conditioner; the present invention provides a multi-split air conditioning system, including a plurality of indoor air conditioners connected to at least one outdoor air conditioner, wherein any indoor air conditioner includes a fault detection device including a temperature sensor according to an embodiment of the second aspect of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic flow diagram of a method of fault detection of a temperature sensor according to one embodiment of the invention;
FIG. 2 shows a schematic block diagram of a fault detection arrangement for a temperature sensor according to an embodiment of the invention;
FIG. 3 illustrates a schematic block diagram of a multi-connected air conditioning system according to an embodiment of the present invention;
fig. 4 shows a schematic configuration diagram of a multi-connected air conditioning system according to an embodiment of the present invention.
Fig. 5 shows a schematic flow diagram of a fault detection method of a temperature sensor according to another embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
FIG. 1 shows a schematic flow diagram of a fault detection method of a temperature sensor of one embodiment of the present invention
As shown in fig. 1, a method for detecting a fault of a temperature sensor according to an embodiment of the present invention includes: step 102, when the indoor air conditioner is in a temperature adjusting operation mode, acquiring a temperature value sensed by a temperature sensor according to a preset acquisition frequency; and 104, when the collection quantity reaches a preset quantity threshold value, determining whether the temperature sensor fails according to the collected multiple temperature values, wherein the temperature sensor is a room temperature sensor and/or a pipe temperature sensor.
In this technical scheme, when indoor air conditioner is in the mode of operation that adjusts the temperature, under normal operating condition, the temperature value that temperature sensor that sets up on indoor air conditioner gathered at different moments is different, through gathering the temperature value that temperature sensor sensed according to predetermineeing the collection frequency, after gathering the temperature value of appointed quantity (being preset quantity threshold value), whether temperature sensor breaks down is confirmed according to a plurality of temperature values of gathering, with when detecting temperature sensor trouble, can in time maintain and change, reduce outdoor air conditioner output unusual probability, thereby can prolong air conditioning system's life, promote user's travelling comfort demand.
Wherein, collection frequency and collection quantity can be confirmed according to refrigeration efficiency, for example, the cooling process is accomplished in 3 minutes, can be confirmed collection frequency to be 1/6 seconds, gather 30 times in 3 minutes.
In addition, the tube temperature sensor can be specifically a temperature sensing bulb, the temperature sensing bulb is one of the components of the thermal expansion valve, the temperature sensing bulb is usually tied on an air outlet pipe of the evaporator, and the temperature information is converted into pressure information and then transmitted to the valve body, so that the flow rate of the valve body can be adjusted.
In the multi-connected air conditioning system, an outdoor air conditioner can adopt an air cooling heat exchange mode, an indoor air conditioner adopts a heat exchanger for heat exchange to realize refrigeration or heating, wherein the heat exchanger is an evaporator or a condenser, a room temperature sensor is arranged at a designated position of the indoor air conditioner and used for detecting the temperature of an indoor environment, a first tube temperature sensor is arranged at an inlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the inlet temperature of the evaporator (or the condenser), and/or a second tube temperature sensor is arranged in the middle of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the middle temperature of the evaporator (or the condenser); and/or the third tube temperature sensor is arranged at the outlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the outlet temperature of the evaporator (or the condenser), when the preset collection frequency is adopted to collect the temperature values of the preset number of threshold values, the collected temperature values are analyzed through the preset analysis model, and when the temperature sensor is determined to be in fault, the fault position is conveniently checked.
Whether the temperature sensor fails or not is determined according to the collected temperature values, analysis can be performed only according to the temperature values to determine whether the temperature sensor fails or not, and comparison with a preset threshold value or a preset range can be performed to determine whether the temperature sensor fails or not.
Whether the temperature sensor fails or not is determined according to the collected temperature values, the temperature values collected by a single temperature sensor can be analyzed, and the temperature values respectively collected by at least two temperature sensors can be compared to determine whether the temperature sensor fails or not.
In addition, the fault detection method of the temperature sensor in the above embodiment provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, when the collection time reaches a preset time threshold, determining whether the temperature sensor has a fault according to the collected multiple temperature values, specifically including the following steps: detecting whether the difference value of any two temperature values in a plurality of temperature values sensed by any one temperature sensor is smaller than or equal to a preset difference threshold value or not; and when the detected difference is smaller than or equal to the preset difference threshold, determining that any one temperature sensor fails.
In the technical scheme, whether a single temperature sensor fails is determined by analyzing a plurality of temperature values acquired by the single temperature sensor, specifically, the temperature difference value of any two of the temperature values can be detected to be less than or equal to a preset difference threshold value, when the temperature difference value of any two is detected to be less than or equal to the preset difference threshold value, the fact that the actual temperature change value is greater than the preset temperature difference threshold value is shown in a time interval when the temperature difference value of any two is acquired, but the temperature sensor is not correctly detected, the temperature sensor fails, the fault detection mode and the processing engineering are simple, and the fault detection accuracy is high.
Further, when the preset temperature difference threshold is 0, that is, when it is detected that the plurality of temperature values are equal, that is, when the indoor air conditioner is in the temperature-adjusting operation mode, the temperature detected by the temperature sensor does not change, that is, it can be indicated that the single temperature sensor is faulty.
In addition, in the cooling mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is less than or equal to the temperature value acquired in the following, and in the heating mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is greater than or equal to the temperature value acquired in the following.
Specifically, the temperature sensor may be a room temperature sensor, and may also be a first pipe temperature sensor, a second pipe temperature sensor, or a third pipe temperature sensor.
In any of the above technical solutions, preferably, the method further includes: any one temperature sensor is a room temperature sensor, and when the difference value detected to be greater than the preset difference value threshold value is detected, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired; when the current operation mode is a refrigeration mode, detecting whether the first temperature value is less than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is less than or equal to the second temperature value; or when the current operation mode is the heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has faults when the first temperature value is greater than or equal to the second temperature value.
In the technical scheme, when the difference value is detected to be larger than the preset difference value threshold value, it is indicated that the abnormality of the room temperature sensor is not detected by adopting the detection mode, at the moment, the first temperature value of the room temperature sensor and the second temperature value of the pipe temperature sensor can be synchronously acquired, and in the cooling mode, the first temperature value in the normal operation state should be larger than the second temperature value, so that when the first temperature value is detected to be smaller than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and in the heating mode, the first temperature value in the normal state should be smaller than the second temperature value, so that when the first temperature value is detected to be larger than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and the fault detection of the pipe temperature sensor is realized.
In addition, when the normal operation of the pipe temperature sensor is detected, whether the room temperature sensor is in failure or not may be detected.
In any of the above technical solutions, preferably, when the acquisition time reaches a preset time threshold, determining whether the temperature sensor has a fault according to a plurality of acquired temperature values, specifically including the following steps: determining a preset temperature interval corresponding to the temperature adjusting operation mode; detecting whether any temperature value exists in a plurality of temperature values acquired by a room temperature sensor, wherein any temperature value does not belong to a preset temperature interval; and when any temperature value which does not belong to the preset temperature interval exists, determining that the room temperature sensor has a fault.
In the technical scheme, the preset temperature interval corresponding to the current operation mode is determined according to the current operation mode of the indoor air conditioner, so that when a temperature value which does not belong to the preset temperature interval exists in a plurality of temperature values acquired by the room temperature sensor, the working abnormality of the room temperature sensor is indicated, namely the fault of the room temperature sensor is determined, the fault detection of the room temperature sensor is realized, and the detection mode is simple.
The preset temperature interval is a temperature interval that room temperature can reach, and specifically may be, in the cooling mode, the preset temperature interval is greater than or equal to 15 ℃ and less than or equal to 55 ℃, and in the heating mode, the preset temperature interval is greater than or equal to-15 ℃ and less than or equal to 35 ℃.
In addition, whether a temperature value which does not belong to a preset temperature interval exists in a plurality of temperature values acquired by the pipe temperature sensor can be detected to determine whether the pipe temperature sensor is in fault.
In any of the above technical solutions, preferably, the method further includes: generating first alarm prompt information when the room temperature sensor is determined to be in fault; and/or generating second alarm prompt information when the pipe temperature sensor is determined to be in fault so as to prompt the fault of the user through the alarm information.
In the technical scheme, when the temperature sensor is determined to have a fault, the alarm prompt information is generated, specifically, when the room temperature sensor has a fault, the first alarm prompt information is generated, when the tube temperature creates an Angel fault, the second alarm prompt information is generated, on one hand, the temperature sensor which specifically generates the fault can be prompted to facilitate the maintenance of a user, on the other hand, the temperature sensor generates the fault by prompting the user, the user can timely troubleshoot and maintain the fault, the probability that the fault of the temperature sensor affects the service life of the system is reduced, and the use experience of the user is improved.
As shown in fig. 2, the failure detection device 200 for a temperature sensor includes: the acquisition unit 202 is used for acquiring a temperature value sensed by the temperature sensor according to a preset acquisition frequency when the indoor air conditioner is in a temperature regulation operation mode; the determining unit 204 is configured to determine whether the temperature sensor fails according to the plurality of acquired temperature values when the acquired number reaches a preset number threshold, where the temperature sensor is a room temperature sensor and/or a tube temperature sensor.
In this technical scheme, when indoor air conditioner is in the mode of operation that adjusts the temperature, under normal operating condition, the temperature value that temperature sensor that sets up on indoor air conditioner gathered at different moments is different, through gathering the temperature value that temperature sensor sensed according to predetermineeing the collection frequency, after gathering the temperature value of appointed quantity (being preset quantity threshold value), whether temperature sensor breaks down is confirmed according to a plurality of temperature values of gathering, with when detecting temperature sensor trouble, can in time maintain and change, reduce outdoor air conditioner output unusual probability, thereby can prolong air conditioning system's life, promote user's travelling comfort demand.
Wherein, collection frequency and collection quantity can be confirmed according to refrigeration efficiency, for example, the cooling process is accomplished in 3 minutes, can be confirmed collection frequency to be 1/6 seconds, gather 30 times in 3 minutes.
In addition, the tube temperature sensor can be specifically a temperature sensing bulb, the temperature sensing bulb is one of the components of the thermal expansion valve, the temperature sensing bulb is usually tied on an air outlet pipe of the evaporator, and the temperature information is converted into pressure information and then transmitted to the valve body, so that the flow rate of the valve body can be adjusted.
In the multi-connected air conditioning system, an outdoor air conditioner can adopt an air cooling heat exchange mode, an indoor air conditioner adopts a heat exchanger for heat exchange to realize refrigeration or heating, wherein the heat exchanger is an evaporator or a condenser, a room temperature sensor is arranged at a designated position of the indoor air conditioner and used for detecting the temperature of an indoor environment, a first tube temperature sensor is arranged at an inlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the inlet temperature of the evaporator (or the condenser), and/or a second tube temperature sensor is arranged in the middle of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the middle temperature of the evaporator (or the condenser); and/or the third tube temperature sensor is arranged at the outlet of the evaporator (or the condenser) of the indoor air conditioner and used for detecting the outlet temperature of the evaporator (or the condenser), when the preset collection frequency is adopted to collect the temperature values of the preset number of threshold values, the collected temperature values are analyzed through the preset analysis model, and when the temperature sensor is determined to be in fault, the fault position is conveniently checked.
Whether the temperature sensor fails or not is determined according to the collected temperature values, analysis can be performed only according to the temperature values to determine whether the temperature sensor fails or not, and comparison with a preset threshold value or a preset range can be performed to determine whether the temperature sensor fails or not.
Whether the temperature sensor fails or not is determined according to the collected temperature values, the temperature values collected by a single temperature sensor can be analyzed, and the temperature values respectively collected by at least two temperature sensors can be compared to determine whether the temperature sensor fails or not.
In any of the above technical solutions, preferably, the method further includes: a detecting unit 206, configured to detect whether a difference between any two temperature values in the multiple temperature values is smaller than or equal to a preset difference threshold; the determining unit 204 is further configured to: and when the detected difference is smaller than or equal to the preset difference threshold, determining that any one temperature sensor fails.
In the technical scheme, whether a single temperature sensor fails is determined by analyzing a plurality of temperature values acquired by the single temperature sensor, specifically, the temperature difference value of any two of the temperature values can be detected to be less than or equal to a preset difference threshold value, when the temperature difference value of any two is detected to be less than or equal to the preset difference threshold value, the fact that the actual temperature change value is greater than the preset temperature difference threshold value is shown in a time interval when the temperature difference value of any two is acquired, but the temperature sensor is not correctly detected, the temperature sensor fails, the fault detection mode and the processing engineering are simple, and the fault detection accuracy is high.
Further, when the preset temperature difference threshold is 0, that is, when it is detected that the plurality of temperature values are equal, that is, when the indoor air conditioner is in the temperature-adjusting operation mode, the temperature detected by the temperature sensor does not change, that is, it can be indicated that the single temperature sensor is faulty.
In addition, in the cooling mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is less than or equal to the temperature value acquired in the following, and in the heating mode, the fault of the temperature sensor can be determined by detecting that the temperature value acquired in advance is greater than or equal to the temperature value acquired in the following.
Specifically, the temperature sensor may be a room temperature sensor, and may also be a first pipe temperature sensor, a second pipe temperature sensor, or a third pipe temperature sensor.
In any of the above technical solutions, preferably, the acquisition unit 202 is further configured to: any one temperature sensor is a room temperature sensor, and when the difference value detected to be greater than the preset difference value threshold value is detected, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired; the detection unit 206 is further configured to: when the current operation mode is a refrigeration mode, detecting whether the first temperature value is less than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is less than or equal to the second temperature value; or when the current operation mode is the heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has faults when the first temperature value is greater than or equal to the second temperature value.
In the technical scheme, when the difference value is detected to be larger than the preset difference value threshold value, it is indicated that the abnormality of the room temperature sensor is not detected by adopting the detection mode, at the moment, the first temperature value of the room temperature sensor and the second temperature value of the pipe temperature sensor can be synchronously acquired, and in the cooling mode, the first temperature value in the normal operation state should be larger than the second temperature value, so that when the first temperature value is detected to be smaller than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and in the heating mode, the first temperature value in the normal state should be smaller than the second temperature value, so that when the first temperature value is detected to be larger than or equal to the second temperature value, the abnormality of the pipe temperature sensor is indicated, and the fault detection of the pipe temperature sensor is realized.
In addition, when the normal operation of the pipe temperature sensor is detected, whether the room temperature sensor is in failure or not may be detected.
In any of the above technical solutions, preferably, the determining unit 204 is further configured to: determining a preset temperature interval corresponding to the temperature adjusting operation mode; the detection unit 206 is further configured to: detecting whether any temperature value exists in a plurality of temperature values acquired by a room temperature sensor, wherein any temperature value does not belong to a preset temperature interval; the determining unit 204 is further configured to: and when any temperature value which does not belong to the preset temperature interval exists, determining that the room temperature sensor has a fault.
In the technical scheme, the preset temperature interval corresponding to the current operation mode is determined according to the current operation mode of the indoor air conditioner, so that when a temperature value which does not belong to the preset temperature interval exists in a plurality of temperature values acquired by the room temperature sensor, the working abnormality of the room temperature sensor is indicated, namely the fault of the room temperature sensor is determined, the fault detection of the room temperature sensor is realized, and the detection mode is simple.
The preset temperature interval is a temperature interval that room temperature can reach, and specifically may be, in the cooling mode, the preset temperature interval is greater than or equal to 15 ℃ and less than or equal to 55 ℃, and in the heating mode, the preset temperature interval is greater than or equal to-15 ℃ and less than or equal to 35 ℃.
In addition, whether a temperature value which does not belong to a preset temperature interval exists in a plurality of temperature values acquired by the pipe temperature sensor can be detected to determine whether the pipe temperature sensor is in fault.
In any of the above technical solutions, preferably, the method further includes: the alarm unit 208 is used for generating first alarm prompt information when the room temperature sensor is determined to be in fault; the alarm unit 208 is further configured to: and when the pipe temperature sensor is determined to be in fault, generating second alarm prompt information so as to prompt the fault of the user through the alarm information.
In the technical scheme, when the temperature sensor is determined to have a fault, the alarm prompt information is generated, specifically, when the room temperature sensor has a fault, the first alarm prompt information is generated, when the tube temperature creates an Angel fault, the second alarm prompt information is generated, on one hand, the temperature sensor which specifically generates the fault can be prompted to facilitate the maintenance of a user, on the other hand, the temperature sensor generates the fault by prompting the user, the user can timely troubleshoot and maintain the fault, the probability that the fault of the temperature sensor affects the service life of the system is reduced, and the use experience of the user is improved.
As shown in fig. 3, an embodiment of a third aspect of the present invention proposes a multi-connected air conditioning system 300 including at least one outdoor air conditioner; a plurality of indoor air conditioners connected to at least one outdoor air conditioner, wherein any indoor air conditioner includes the fault detection device 200 including the temperature sensor according to the embodiment of the second aspect of the present invention, and therefore, the multi-connected air conditioning system 300 includes the technical effect of the fault detection device 200 including the temperature sensor according to any one of the above technical solutions, which is not described herein again.
As shown in fig. 4, the multi-connected air conditioning system according to the embodiment of the present invention includes: a compressor 402, a condenser 404, an electronic expansion valve 406, an evaporator 412, a room temperature sensor 410, a pipe temperature sensor 408, a pipe temperature sensor 414, and a pipe temperature sensor 416.
Specifically, the room temperature sensor 410 is disposed at a designated location of the indoor air conditioner for detecting the temperature of the indoor environment, the first tube temperature sensor 408 is disposed at an inlet of an evaporator 412 (or a condenser) of the indoor air conditioner for detecting the inlet temperature of the evaporator 412 (or the condenser), and/or the second tube temperature sensor 414 is disposed at a middle portion of the evaporator 412 (or the condenser) of the indoor air conditioner for detecting the middle temperature of the evaporator 412 (or the condenser); and/or the third tube temperature sensor 416 is placed at an outlet of the evaporator 412 (or the condenser) of the indoor air conditioner and is used for detecting the outlet temperature of the evaporator 412 (or the condenser), when the preset collection frequency is adopted to collect the temperature values of the preset number of threshold times, the collected temperature values are analyzed through the preset analysis model, and when the temperature sensor is determined to be in fault, the fault position is conveniently checked.
Fig. 5 shows a schematic flow diagram of a fault detection method of a temperature sensor according to another embodiment of the invention.
As shown in fig. 5, a fault detection method of a temperature sensor according to another embodiment of the present invention includes: step 502, after the indoor air conditioner is operated, acquiring a temperature value T1 sensed by the room temperature sensor for 30 times according to the acquisition frequency of 1 time/minute; step 504, whether the 30 temperature values have unequal items or not is judged, if yes, the step 506 is entered, and if not, the step 508 is entered; step 506, detecting an operation mode; step 508, room temperature sensor failure; step 510, detecting 30 temperature values T1 under the refrigeration mode, wherein whether the temperature values are more than 15 ℃ and less than T1 and less than 55 ℃, if yes, entering step 512, and if not, entering step 508; step 512, collecting temperature value T2 sensed by the 30-time pipe temperature sensor according to the collection frequency of 1 time/minute; step 514, judging whether the 30 temperature values have unequal items, if so, entering step 516, and if not, entering step 520; step 516, detecting T2-T1>0, if yes, entering step 520, if no, entering step 518; step 518, the temperature sensor is faultless; step 520, a pipe temperature sensor fails; step 522, in the heating mode, detecting whether 30 temperature values T1 are-25 ℃ and T1 and 35 ℃, if yes, entering step 524, and if no, entering step 526; step 524, collecting temperature values T2 sensed by the 30-time tube temperature sensor according to the collection frequency of 1 time/minute; step 526, room temperature sensor failure; step 528, if there are unequal terms in the 30 temperature values, if yes, go to step 530, if no, go to step 534; step 530, detecting that T2-T1 is less than 0, if yes, entering step 534, if no, entering step 532; step 532, the temperature sensor is fault-free; at step 534, the tube temperature sensor fails.
The multi-connected air conditioning system shown in fig. 3 and 4 includes a processor, and the processor is configured to implement the following steps when executing the program stored in the memory:
when the indoor air conditioner is in a temperature adjusting operation mode, acquiring a temperature value sensed by a temperature sensor according to a preset acquisition frequency; and when the collection quantity reaches a preset quantity threshold value, determining whether the temperature sensor fails or not according to the collected multiple temperature values, wherein the temperature sensor is a room temperature sensor and/or a pipe temperature sensor.
When the acquisition time reaches a preset time threshold, determining whether the temperature sensor fails according to a plurality of acquired temperature values, specifically comprising the following steps: detecting whether the difference value of any two temperature values in a plurality of temperature values sensed by any one temperature sensor is smaller than or equal to a preset difference threshold value or not; and when the detected difference is smaller than or equal to the preset difference threshold, determining that any one temperature sensor fails.
Any one temperature sensor is a room temperature sensor, and when the difference value detected to be greater than the preset difference value threshold value is detected, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired; when the current operation mode is a refrigeration mode, detecting whether the first temperature value is less than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is less than or equal to the second temperature value; or when the current operation mode is the heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has faults when the first temperature value is greater than or equal to the second temperature value.
When the acquisition time reaches a preset time threshold, determining whether the temperature sensor fails according to a plurality of acquired temperature values, specifically comprising the following steps: determining a preset temperature interval corresponding to the temperature adjusting operation mode; detecting whether any temperature value exists in a plurality of temperature values acquired by a room temperature sensor, wherein any temperature value does not belong to a preset temperature interval; and when any temperature value which does not belong to the preset temperature interval exists, determining that the room temperature sensor has a fault.
Generating first alarm prompt information when the room temperature sensor is determined to be in fault; and/or generating second alarm prompt information when the pipe temperature sensor is determined to be in fault so as to prompt the fault of the user through the alarm information.
A readable storage medium having stored thereon a program (instructions) for executing the above steps by a processor.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with a program, which may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc-Read-Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A fault detection method of a temperature sensor is suitable for an indoor air conditioner, wherein the indoor air conditioner is respectively provided with a room temperature sensor and a pipe temperature sensor, and the fault detection method is characterized by comprising the following steps:
when the indoor air conditioner is in a temperature adjusting operation mode, acquiring a temperature value sensed by a temperature sensor according to a preset acquisition frequency in a normal operation state of the indoor air conditioner;
when the collection quantity reaches a preset quantity threshold value, determining whether the temperature sensor fails or not according to the collected temperature values,
wherein the temperature sensor is the room temperature sensor and/or the pipe temperature sensor;
when the acquisition time reaches a preset time threshold value, determining whether the temperature sensor fails according to a plurality of acquired temperature values, specifically comprising the following steps:
detecting whether the difference value of any two temperature values in the plurality of temperature values sensed by any one temperature sensor is smaller than or equal to a preset difference threshold value;
when the difference is detected to be smaller than or equal to the preset difference threshold value, determining that any one of the temperature sensors fails;
when the acquisition time reaches a preset time threshold value, determining whether the temperature sensor fails according to a plurality of acquired temperature values, specifically comprising the following steps:
determining a preset temperature interval corresponding to the temperature adjusting operation mode;
detecting whether any one temperature value exists in a plurality of temperature values acquired by the room temperature sensor, wherein the any one temperature value does not belong to the preset temperature interval;
and when any one temperature value which does not belong to the preset temperature interval is detected, determining that the room temperature sensor has a fault.
2. The method of detecting a failure of a temperature sensor according to claim 1, further comprising:
any one of the temperature sensors is the room temperature sensor, and when the difference value is detected to be larger than the preset difference value threshold value, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired;
when the temperature adjusting operation mode is a refrigeration mode, detecting whether the first temperature value is smaller than or equal to the second temperature value or not, and determining that the pipe temperature sensor has a fault when the first temperature value is smaller than or equal to the second temperature value; or
And when the temperature adjusting operation mode is a heating mode, detecting whether the first temperature value is greater than or equal to the second temperature value, and determining that the pipe temperature sensor has a fault when the first temperature value is greater than or equal to the second temperature value.
3. The method of detecting a failure of a temperature sensor according to claim 1 or 2, characterized by further comprising:
generating first alarm prompt information when the room temperature sensor is determined to be in fault; and/or
And generating second alarm prompt information when the pipe temperature sensor is determined to be in fault so as to prompt the fault of the user through the alarm information.
4. The utility model provides a temperature sensor's fault detection device, is applicable to room air conditioner, room air conditioner is provided with room temperature sensor and pipe temperature sensor respectively, its characterized in that includes:
the temperature sensor comprises a collecting unit, a temperature sensor and a temperature sensor, wherein the collecting unit is used for collecting a temperature value sensed by the temperature sensor according to a preset collecting frequency in a normal running state of the indoor air conditioner when the indoor air conditioner is in a temperature adjusting running mode;
a determining unit, configured to determine whether the temperature sensor fails according to the plurality of acquired temperature values when the acquired number reaches a preset number threshold,
wherein the temperature sensor is the room temperature sensor and/or the pipe temperature sensor;
the detection unit is used for detecting whether the difference value of any two temperature values in the plurality of temperature values sensed by any one temperature sensor is smaller than or equal to a preset difference threshold value or not;
the determination unit is further configured to: when the difference is detected to be smaller than or equal to the preset difference threshold value, determining that any one of the temperature sensors fails;
the determination unit is further configured to: determining a temperature adjusting operation mode of the indoor air conditioner so as to determine a corresponding preset temperature interval according to the temperature adjusting operation mode;
the detection unit is further configured to: detecting whether any one temperature value exists in a plurality of temperature values acquired by the room temperature sensor, wherein the any one temperature value does not belong to the preset temperature interval;
the determination unit is further configured to: and when any one temperature value which does not belong to the preset temperature interval is detected, determining that the room temperature sensor has a fault.
5. The failure detection device of a temperature sensor according to claim 4,
the acquisition unit is further configured to: any one of the temperature sensors is the room temperature sensor, and when the difference value is detected to be larger than the preset difference value threshold value, a first temperature value sensed by the room temperature sensor and a second temperature value sensed by the pipe temperature sensor are synchronously acquired;
the detection unit is further configured to: when the temperature adjusting operation mode is a refrigeration mode, detecting whether the first temperature value is greater than the second temperature value or not, and determining that the pipe temperature sensor has a fault when the first temperature value is greater than the second temperature value;
the detection unit is further configured to: and when the temperature adjusting operation mode is a heating mode, detecting whether the first temperature value is smaller than the second temperature value or not, and determining that the pipe temperature sensor has a fault when the first temperature value is smaller than the second temperature value.
6. The failure detection device of the temperature sensor according to claim 4 or 5, characterized by further comprising:
the alarm unit is used for generating first alarm prompt information when the room temperature sensor is determined to be in fault;
the alarm unit is further configured to: and generating second alarm prompt information when the pipe temperature sensor is determined to be in fault so as to prompt the fault of the user through the alarm information.
7. A multi-connected air conditioning system, comprising:
at least one outdoor air conditioner;
a plurality of indoor air conditioners connected to at least one outdoor air conditioner, wherein any one of the indoor air conditioners includes the fault detection device of the temperature sensor according to any one of claims 4 to 6.
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