CN112648710A - Exhaust temperature sensor fault detection method and device and air conditioning equipment - Google Patents
Exhaust temperature sensor fault detection method and device and air conditioning equipment Download PDFInfo
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- CN112648710A CN112648710A CN202011521798.6A CN202011521798A CN112648710A CN 112648710 A CN112648710 A CN 112648710A CN 202011521798 A CN202011521798 A CN 202011521798A CN 112648710 A CN112648710 A CN 112648710A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Abstract
The application is suitable for the technical field of air conditioning equipment, and provides a fault detection method and device for an exhaust temperature sensor and the air conditioning equipment, wherein the method comprises the following steps: acquiring a first detection value, wherein the first detection value is obtained after the first exhaust temperature sensor detects the temperature of the exhaust of the air conditioning equipment; acquiring a theoretical exhaust temperature value of the air conditioning equipment; and comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result. By the method, the accuracy of the obtained judgment result of whether the first exhaust temperature sensor has a fault can be improved.
Description
Technical Field
The application belongs to the technical field of air conditioning equipment, and particularly relates to a fault detection method and device for an exhaust temperature sensor, air conditioning equipment and a computer readable storage medium.
Background
In order to ensure reliable operation of the air conditioning equipment, the air conditioning equipment is generally provided with an exhaust temperature sensor, and when a detection value of the exhaust temperature sensor reaches a certain threshold value, the air conditioning equipment gives a fault alarm and performs a shutdown operation.
Disclosure of Invention
The embodiment of the application provides a fault detection method for an exhaust temperature sensor, which can accurately judge whether the first exhaust temperature sensor has a fault.
In a first aspect, an embodiment of the present application provides a method for detecting a fault of an exhaust temperature sensor, which is applied to an air conditioning apparatus including a first exhaust temperature sensor, and includes:
acquiring a first detection value, wherein the first detection value is obtained after the first exhaust temperature sensor detects the temperature of the exhaust of the air conditioning equipment;
acquiring a theoretical exhaust temperature value of the air conditioning equipment;
and comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result.
In a second aspect, an embodiment of the present application provides an exhaust temperature sensor fault detection apparatus, applied to an air conditioning device including a first exhaust temperature sensor, including:
a first detection value acquisition unit configured to acquire a first detection value that is a detection value obtained by the first exhaust temperature sensor detecting the temperature of the exhaust gas of the air conditioning equipment;
a theoretical exhaust temperature value obtaining unit, configured to obtain a theoretical exhaust temperature value of the air conditioning equipment;
and the fault judgment unit is used for comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result.
In a third aspect, an embodiment of the present application provides an air conditioning apparatus, including a first exhaust temperature sensor, a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method according to the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method according to the first aspect.
In a fifth aspect, embodiments of the present application provide a computer program product, which, when running on an air conditioning apparatus, causes the air conditioning apparatus to perform the method of the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that:
since the first detection value is a detection value obtained by detecting the temperature of the exhaust gas of the air conditioning equipment by the first exhaust temperature sensor, that is, the first detection value is an actual detection value obtained, and when the first exhaust temperature sensor is not in failure, the difference between the actual detection value obtained by the first exhaust temperature sensor and the theoretical exhaust temperature value is not large, it is possible to determine whether the first exhaust temperature sensor is in failure by comparing the first detection value with the theoretical exhaust temperature value. That is, since it is not directly determined whether the first exhaust temperature sensor has a failure based on the first detection value, but is determined in combination with the theoretical exhaust temperature value, and the theoretical exhaust temperature value is usually accurate, the accuracy of the determination result is improved.
It is understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below.
FIG. 1 is a schematic flow chart illustrating a method for detecting a fault in an exhaust temperature sensor according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of another method for detecting a fault in an exhaust temperature sensor according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a framework of an exhaust temperature sensor fault detection apparatus according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of an air conditioning equipment according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of an air conditioner according to a third embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," "fourth," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
The first embodiment is as follows:
in the existing air conditioning equipment, when the detection value of the exhaust temperature sensor reaches a certain threshold value, the air conditioning equipment can give a fault alarm, and the air conditioning equipment can also execute shutdown operation. However, since the exhaust gas temperature sensor may have a fault, if the air conditioner performs a stop operation only based on the detection value of the exhaust gas temperature sensor, an erroneous stop of the air conditioner may be caused, thereby causing great inconvenience to a user. For example, when the air conditioning apparatus is an air conditioner, when a detection value of an exhaust gas temperature sensor of an air conditioning system reaches a certain threshold value, the detection value may be a detection value obtained only when the exhaust gas temperature sensor fails, and at this time, if the air conditioner directly performs a shutdown operation, the air conditioner may not be able to continue adjusting the temperature of the environment, thereby causing great inconvenience to a user. In order to solve the above technical problem, an embodiment of the present application provides a method for detecting a fault of an exhaust temperature sensor, in which a first detection value and a theoretical exhaust temperature value of an air conditioning device need to be obtained, and then whether the first exhaust temperature sensor has a fault is determined according to the obtained first detection value and the theoretical exhaust temperature value. Since the first detection value is a detection value obtained by the first exhaust temperature sensor detecting the temperature of the exhaust gas of the air conditioning equipment, that is, the first detection value is an actual detection value obtained, and when the first exhaust temperature sensor is not failed, the difference between the actual detection value obtained by the first exhaust temperature sensor and the theoretical exhaust temperature value is not large, it is possible to determine whether the first exhaust temperature sensor is failed by comparing the first detection value with the theoretical exhaust temperature value.
The following describes a method for detecting a failure of an exhaust gas temperature sensor according to an embodiment of the present application with reference to the drawings.
Fig. 1 shows a flowchart of an exhaust gas temperature sensor fault detection method provided in an embodiment of the present application, which is applied to an air conditioning apparatus including a first exhaust gas temperature sensor, and is detailed as follows:
in step S11, a first detection value is acquired as a result of the first exhaust temperature sensor detecting the temperature of the exhaust gas of the air conditioner.
Specifically, during the operation of the air conditioning equipment, the first exhaust temperature sensor detects the temperature of the exhaust of the air conditioning equipment in real time or at intervals of a preset time, such as the temperature of the exhaust of a compressor of the air conditioning equipment, and obtains a first detection value. And then, the first exhaust temperature sensor reports to a processor of the air conditioner, or the processor of the air conditioner actively acquires a first detection value obtained by the processor from the first exhaust temperature sensor.
And step S12, acquiring the theoretical exhaust temperature value of the air conditioning equipment.
Specifically, the processor of the air conditioning device may calculate theoretical exhaust temperature values of the air conditioning device under different conditions in advance, for example, the theoretical exhaust temperature values corresponding to different operation durations and different operation frequencies of the air conditioning device are calculated in advance. For another example, if the air conditioner further includes a compressor, and an exhaust pressure sensor and an intake pressure sensor connected to the compressor, respectively, a theoretical exhaust temperature value corresponding to the exhaust pressure and the intake pressure may be calculated in advance from saturation temperatures corresponding to different exhaust pressures and intake pressures. Therefore, the corresponding theoretical exhaust temperature value can be quickly acquired according to the current condition.
In some embodiments, the processor of the air conditioning equipment may also calculate the corresponding theoretical exhaust temperature value after acquiring the current conditions, such as the exhaust pressure and the suction pressure, in combination with the actual conditions.
In some embodiments, the theoretical exhaust temperature value may be determined in the following manner:
Tdmap＝C_1+C_2·S+C_3·D+C_4·S^2+C_5·S·D+C_6·D^2+C_7·S^3+C_8·S^2·D+C_9·S·D^2+C_10·D^3
wherein Tdmap is a theoretical exhaust temperature value, C _1 to C _10 are values associated with compressors, and C _1 to C _10 corresponding to different compressors are different, for example, C _1 to C _10 corresponding to compressors of different capacities are different, for example, C _1 to C _10 corresponding to compressors of different models are different, and so on.
Wherein D is the saturation temperature corresponding to the exhaust pressure, and S is the saturation temperature corresponding to the suction pressure.
Step S13 is to compare the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and determine whether the first exhaust temperature sensor has a failure or not based on the first comparison result.
Specifically, the first detection value and the theoretical exhaust temperature value are compared to find a difference between the first detection value and the theoretical exhaust temperature value, and for example, the difference (or the absolute value of the difference) between the first detection value and the theoretical exhaust temperature value is a first comparison result, or the ratio between the first detection value and the theoretical exhaust temperature value is a first comparison result.
In the embodiment of the present invention, since the first detection value is a detection value obtained by detecting the temperature of the exhaust gas of the air conditioning equipment by the first exhaust temperature sensor, that is, the first detection value is an actual detection value obtained, and when the first exhaust temperature sensor is not in failure, the difference between the actual detection value obtained by the first exhaust temperature sensor and the theoretical exhaust temperature value is not large, it is possible to determine whether the first exhaust temperature sensor is in failure by comparing the first detection value with the theoretical exhaust temperature value. That is, since it is not directly determined whether the first exhaust temperature sensor has a failure based on the first detection value, but is determined in combination with the theoretical exhaust temperature value, and the theoretical exhaust temperature value is usually accurate, the accuracy of the determination result is improved.
Fig. 2 shows a flowchart of another exhaust gas temperature sensor fault detection method provided in the embodiment of the present application, in the embodiment, the step S13 is mainly defined, and the steps S21 and S22 are the same as the steps S11 and S12, and are not described again here.
In step S21, a first detection value is acquired as a result of the first exhaust temperature sensor detecting the temperature of the exhaust gas of the air conditioner.
And step S22, acquiring the theoretical exhaust temperature value of the air conditioning equipment.
Step S23 is to make a difference between the first detection value and the theoretical exhaust temperature value, and if the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, determine that the first exhaust temperature sensor has a failure.
Wherein the first preset value is usually large, for example 30 ℃.
It is to be noted that, when it is judged that the first exhaust temperature sensor has a failure, the air conditioner does not perform the stop operation but continues to operate.
In the embodiment of the application, when the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than the first preset value, it is determined that the first exhaust temperature sensor has a fault, so that the first exhaust temperature sensor which is greater than the theoretical exhaust temperature value or much smaller than the theoretical exhaust temperature value can be determined to have a fault, that is, the determination result is more in line with the actual situation, and the accuracy of the determination result is improved.
In some embodiments, in order to further improve the accuracy of the obtained determination result, it is further included, after the step S22, that the exhaust temperature value often does not reach the theoretical exhaust temperature value in practical situations:
and A1, acquiring a correction coefficient corresponding to the air conditioner. The correction factor is related to the units of the air conditioning equipment, for example, the structure of each unit in the air conditioning equipment. In some embodiments, the number of the correction coefficients is 1 or more than 1, and when the number of the correction coefficients is increased, the corrected exhaust temperature value is more accurate.
And A2, correcting the theoretical exhaust temperature value according to the correction coefficient to obtain a corrected exhaust temperature value of the air conditioning equipment.
Specifically, assuming that the number of correction coefficients is 2, the theoretical exhaust temperature value is corrected by using the following formula:
td is the corrected exhaust temperature value, and a and b are correction coefficients related to the unit, that is, the corrected exhaust temperature value corrected according to a and b can be adaptively adjusted according to different air-conditioning equipment, that is, the corrected exhaust temperature value is closer to the true value.
In step S23, if the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, the method for determining that the first exhaust temperature sensor has a failure includes:
and if the absolute value of the difference between the first detection value and the corrected exhaust temperature value is greater than a first preset value, determining that the first exhaust temperature sensor has a fault.
In the embodiment of the application, the theoretical exhaust temperature value is corrected, so that the obtained corrected exhaust temperature value is closer to the true value, and the judgment result of whether the first exhaust temperature sensor has a fault or not obtained according to the corrected exhaust temperature value is more accurate.
In some embodiments, if it is determined that the first exhaust temperature sensor has a fault, the fault information is recorded, and the fault information may be a specific fault code or the like, so that when the air conditioner is repaired, a repair person can quickly repair the air conditioner according to the fault information. Further, if the air conditioning equipment is in communication connection with the cloud, the air conditioning equipment uploads the fault information to the cloud, so that maintenance personnel can timely know the fault of the air conditioning equipment.
In some embodiments, the above exhaust gas temperature sensor malfunction detection method includes:
and if the absolute value of the difference between the first detection value and the corrected exhaust temperature value is less than or equal to the first preset value and greater than a second preset value, executing shutdown operation.
Wherein the second preset value can be set to a smaller number, for example 5 ℃.
In the embodiment of the application, when it is determined that the absolute value of the difference between the corrected exhaust temperature value and the theoretical exhaust temperature value is less than or equal to the first preset value and greater than the second preset value, it indicates that a system of the air conditioning equipment may have a fault, and at this time, in order to ensure safe use, the air conditioning equipment executes a shutdown operation.
In some embodiments, in order to facilitate the user to timely repair the air conditioner, the air conditioner performs a fault notification, for example, a fault notification by sound or light.
In some embodiments, the air conditioning apparatus further includes a second exhaust temperature sensor, and the exhaust temperature sensor failure detection method includes:
and acquiring a second detection value, wherein the second detection value is obtained by detecting the temperature of the exhaust gas of the air conditioning equipment by the second exhaust gas temperature sensor.
Correspondingly, the step S11 includes:
and comparing the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a second comparison result, and judging whether the first exhaust temperature sensor has a fault according to the second comparison result.
In the embodiment of the application, the second detection value is added to judge whether the first exhaust temperature sensor has a fault, so that the compared information amount is increased, and the accuracy of the obtained judgment result whether the first exhaust temperature sensor has the fault is improved.
In some embodiments, considering that there may be a plurality of exhaust gas temperature sensors in one air conditioner, in order to reduce the amount of calculation, the second detection value of the second exhaust gas temperature sensor closest to the first exhaust gas temperature sensor may be selected to participate in the comparison. Since the closer the distance between the two exhaust temperature sensors is, the closer the detected values obtained by the two exhaust temperature sensors should be, the more accurate the obtained determination result can be improved by comparing the detected values of the two exhaust temperature sensors closest to each other with the theoretical exhaust temperature value.
In some embodiments, comparing the first detection value, the second detection value, and the theoretical exhaust temperature value to obtain a second comparison result, and determining whether the first exhaust temperature sensor has a fault based on the second comparison result includes:
and B1, calculating the mean value of the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a temperature mean value.
B2, calculating absolute values of the difference between the theoretical exhaust temperature value and the temperature average value, and the first detection value, the second detection value, and the theoretical exhaust temperature value, respectively.
B3, if the absolute value of the difference between the first detection value and the temperature average value is greater than or equal to a preset difference threshold, determining that the first exhaust temperature sensor has a fault.
In some embodiments, the preset difference threshold is greater than the second preset value and less than the first preset value.
Specifically, assume that the first detection value, the second detection value, and the theoretical exhaust temperature value are: 100. 70 and 80, and the preset difference threshold is 15, the obtained temperature average value is 80, and since 100-80 is 20 and 20 is more than 15, the first exhaust temperature sensor is judged to have a fault.
In the embodiment of the application, the exhaust temperature sensor corresponding to the maximum difference value is judged to have a fault through B1-B3. Because the first detection value, the second detection value and the theoretical exhaust temperature value are exhaust temperature values of the air conditioning equipment, if the exhaust temperature sensor has no fault, the first detection value, the second detection value and the theoretical exhaust temperature value are values with small difference, that is, the exhaust temperature sensor corresponding to the detection value with large difference (larger than a preset difference threshold) is the exhaust temperature sensor with the fault, that is, through the steps, the accuracy of the obtained judgment result can be improved.
In some embodiments, if the first detection value is equal to a first target value, and the first target value is a system protection threshold value of the air conditioner, after determining that the first exhaust temperature sensor has a fault, the method includes:
and determining a second target value as a system protection threshold value of the air conditioning equipment, wherein the second target value is smaller than the first target value.
The system protection threshold is used to trigger a protection mechanism, for example, when the system protection threshold is reached, a shutdown operation is performed.
In the embodiment of the application, since the air conditioning equipment still continues to operate after the first exhaust temperature sensor is judged to have a fault, in order to prevent serious system faults caused by inaccurate fitting (namely, inaccurate obtained theoretical exhaust temperature value or inaccurate obtained corrected exhaust temperature value) under special boundary conditions, the system protection threshold value of the air conditioning equipment is reduced. Of course, after it is determined that the first exhaust temperature sensor has a fault, the theoretical exhaust temperature value or the corrected exhaust temperature value is used to replace the first detection value of the first exhaust temperature sensor, that is, the theoretical exhaust temperature value or the corrected exhaust temperature value is subsequently compared with the system protection threshold value to determine whether to trigger the system protection mechanism.
In some embodiments, the determining that the first exhaust temperature sensor has a failure includes, if the first detection value is equal to a third target value, and the third target value is a system control value of the air conditioner:
and determining a fourth target value as a system control value of the air conditioning equipment, and reducing the load of the air conditioning equipment, wherein the fourth target value is smaller than the third target value.
Specifically, the system of the air conditioner controls the components of the air conditioner according to the system control value, for example, adjusting the frequency of the compressor of the air conditioner, and the like.
In some embodiments, reducing the load on the air conditioning apparatus comprises: increasing the set value of the refrigeration working condition, for example, from 17 ℃ to 26 ℃; and/or, adjusting a set point for a heating condition, e.g., from 30 ℃ to 28 ℃.
In the embodiment of the application, after the first exhaust temperature sensor is judged to have a fault, the air conditioning equipment continues to operate, and the difference between the theoretical exhaust temperature value or the corrected exhaust temperature value and the true value is considered, so that the system control value is reduced, and the safety of the air conditioning equipment is ensured.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Example two:
fig. 3 shows a block diagram of a fault detection device of an exhaust gas temperature sensor provided in an embodiment of the present application, corresponding to the above-described fault detection method of the exhaust gas temperature sensor in the above-described embodiment, for detecting a fault of an air conditioning apparatus to which the first exhaust gas temperature sensor is applied.
Referring to fig. 3, the exhaust gas temperature sensor failure detection device 3 includes:
a first detection value acquisition unit 31 configured to acquire a first detection value obtained by detecting the temperature of the exhaust gas of the air conditioning equipment by the first exhaust temperature sensor.
And a theoretical exhaust temperature value obtaining unit 32, configured to obtain a theoretical exhaust temperature value of the air conditioning equipment.
In some embodiments, the theoretical exhaust temperature value obtaining unit 32 is configured to calculate theoretical exhaust temperature values of the air conditioning equipment under different conditions in advance, so that when the theoretical exhaust temperature value needs to be used, the corresponding theoretical exhaust temperature value can be obtained quickly according to the current conditions.
In some embodiments, the theoretical exhaust temperature value obtaining unit 32 is configured to calculate the corresponding theoretical exhaust temperature value after obtaining the current condition.
And a failure determination unit 33 configured to compare the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and determine whether the first exhaust temperature sensor has a failure based on the first comparison result.
In the embodiment of the present invention, since the first detection value is a detection value obtained by detecting the temperature of the exhaust gas of the air conditioning equipment by the first exhaust temperature sensor, that is, the first detection value is an actual detection value obtained, and when the first exhaust temperature sensor is not in failure, the difference between the actual detection value obtained by the first exhaust temperature sensor and the theoretical exhaust temperature value is not large, it is possible to determine whether the first exhaust temperature sensor is in failure by comparing the first detection value with the theoretical exhaust temperature value. That is, since it is not directly determined whether the first exhaust temperature sensor has a failure based on the first detection value, but is determined in combination with the theoretical exhaust temperature value, and the theoretical exhaust temperature value is usually accurate, the accuracy of the determination result is improved.
In some embodiments, the failure determining unit 33 is specifically configured to:
and (3) making a difference between the first detection value and the theoretical exhaust temperature value, and if the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, determining that the first exhaust temperature sensor has a fault.
In some embodiments, the exhaust gas temperature sensor malfunction detection apparatus 3 includes:
and a correction coefficient acquisition unit for acquiring a correction coefficient corresponding to the air conditioning equipment.
And the corrected exhaust temperature value determining unit is used for correcting the theoretical exhaust temperature value according to the correction coefficient to obtain a corrected exhaust temperature value of the air conditioning equipment.
Correspondingly, when the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, the failure determination unit 33 determines that the first exhaust temperature sensor has a failure, and specifically:
and if the absolute value of the difference between the first detection value and the corrected exhaust temperature value is greater than a first preset value, determining that the first exhaust temperature sensor has a fault.
In some embodiments, the exhaust gas temperature sensor malfunction detection apparatus 3 described above includes:
and a shutdown unit, configured to execute a shutdown operation if an absolute value of a difference between the first detection value and the corrected exhaust temperature value is less than or equal to the first preset value and greater than a second preset value.
In some embodiments, in order to facilitate the user to repair the air conditioning equipment in time, the exhaust temperature sensor fault detection apparatus 3 includes:
and a fault prompting unit for performing fault prompting, for example, by sound or light.
In some embodiments, the air conditioning apparatus further includes a second exhaust temperature sensor, and the exhaust temperature sensor failure detection device 3 includes:
and a second detection value acquisition unit configured to acquire a second detection value that is a detection value obtained by detecting a temperature of the exhaust gas of the air conditioning equipment by the second exhaust gas temperature sensor.
Correspondingly, the failure determination unit 33 is specifically configured to:
and comparing the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a second comparison result, and judging whether the first exhaust temperature sensor has a fault according to the second comparison result.
In some embodiments, the failure determination unit 33, when comparing the first detection value, the second detection value, and the theoretical exhaust temperature value to obtain a second comparison result, and determining whether the first exhaust temperature sensor has a failure based on the second comparison result, specifically includes:
and the temperature mean value calculating module is used for calculating the mean values of the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a temperature mean value.
And the absolute value calculation module of the difference of the mean values is used for respectively calculating the absolute values of the difference between the first detection value, the second detection value and the theoretical exhaust temperature value and the temperature mean value.
And the fault determination module is used for determining that the first exhaust temperature sensor has a fault if the absolute value of the difference between the first detection value and the temperature mean value is greater than or equal to a preset difference threshold value.
In some embodiments, if the first detection value is equal to a first target value, and the first target value is a system protection threshold of the air conditioning equipment, the exhaust temperature sensor fault detection device 3 includes:
and a second target value determination unit configured to determine a second target value as a system protection threshold of the air conditioning equipment, where the second target value is smaller than the first target value.
In some embodiments, if the first detection value is equal to a third target value, and the third target value is a system control value of the air conditioning equipment, the exhaust gas temperature sensor fault detection device 3 includes:
and a fourth target value determination unit configured to determine a fourth target value as a system control value of the air conditioning equipment and reduce a load of the air conditioning equipment, wherein the fourth target value is smaller than the third target value.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
Example three:
fig. 4 is a schematic structural diagram of an air conditioning apparatus according to an embodiment of the present application. As shown in fig. 4, the air conditioning apparatus 4 of the embodiment includes: at least one processor 40 (only one processor is shown in fig. 4), a memory 41, a computer program 42 stored in the memory 41 and executable on the at least one processor 40, and a first exhaust temperature sensor 43, wherein the processor 40 implements any of the steps of the first embodiment when the computer program 42 is executed by the processor 40.
The Processor 40 may be a Central Processing Unit (CPU), and the Processor 40 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 41 may be an internal storage unit of the air conditioner 4, such as a hard disk or an internal memory of the air conditioner 4. In other embodiments, the memory 41 may be an external storage device of the air conditioner 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, provided on the air conditioner 4. Further, the memory 41 may include both an internal storage unit and an external storage device of the air conditioner 4. The memory 41 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, other programs, and the like, such as program codes of the computer programs. The above-mentioned memory 41 may also be used to temporarily store data that has been output or is to be output.
In some embodiments, the air conditioning apparatus 4 described above may be an air conditioner, and a schematic diagram of components of the air conditioner is shown in fig. 5.
In fig. 5, the air conditioner 5 includes: the compressor 10, the four-way valve 20, the outdoor heat exchanger 30, the throttle device 40, and the indoor heat exchanger 50 are provided with an exhaust gas temperature sensor 60 and an exhaust gas pressure sensor 70 in an exhaust gas line of the compressor, and an intake gas temperature sensor 80 and an intake gas pressure sensor 90 in an intake gas line of the compressor.
Alternatively, the discharge temperature sensor 60 may be disposed on the compressor discharge pipe or the compressor body, or may be disposed at any position before the compressor discharges the air to the throttle device 40.
The embodiment of the present application provides a computer program product, which, when running on an air conditioning device, causes the air conditioning device to execute one of the above-mentioned methods of the above-mentioned embodiments.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to an air conditioning apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), Random-Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other ways. For example, the above-described apparatus/network device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (11)
1. An exhaust gas temperature sensor failure detection method applied to an air conditioning apparatus including a first exhaust gas temperature sensor, comprising:
acquiring a first detection value, wherein the first detection value is obtained after the first exhaust temperature sensor detects the temperature of the exhaust of the air conditioning equipment;
acquiring a theoretical exhaust temperature value of the air conditioning equipment;
and comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result.
2. The exhaust gas temperature sensor malfunction detection method according to claim 1, wherein the comparing the first detection value with the theoretical exhaust gas temperature value to obtain a first comparison result, and determining whether the first exhaust gas temperature sensor malfunctions or not based on the first comparison result includes:
and making a difference between the first detection value and the theoretical exhaust temperature value, and if the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, determining that the first exhaust temperature sensor has a fault.
3. The exhaust temperature sensor fault detection method of claim 2, further comprising, after said obtaining a theoretical exhaust temperature value for the air conditioning unit:
acquiring a correction coefficient corresponding to the air conditioning equipment;
correcting the theoretical exhaust temperature value according to the correction coefficient to obtain a corrected exhaust temperature value of the air conditioning equipment;
if the absolute value of the difference between the first detection value and the theoretical exhaust temperature value is greater than a first preset value, determining that the first exhaust temperature sensor has a fault, including:
and if the absolute value of the difference between the first detection value and the corrected exhaust temperature value is greater than a first preset value, judging that the first exhaust temperature sensor has a fault.
4. The exhaust temperature sensor malfunction detection method according to claim 3, characterized in that the exhaust temperature sensor malfunction detection method includes:
and if the absolute value of the difference between the first detection value and the corrected exhaust temperature value is less than or equal to the first preset value and greater than a second preset value, executing shutdown operation.
5. The exhaust temperature sensor malfunction detection method according to claim 1, wherein the air conditioning apparatus further includes a second exhaust temperature sensor, the exhaust temperature sensor malfunction detection method comprising:
acquiring a second detection value, wherein the second detection value is obtained after the second exhaust temperature sensor detects the temperature of the exhaust of the air conditioning equipment;
the comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result, includes:
and comparing the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a second comparison result, and judging whether the first exhaust temperature sensor has a fault according to the second comparison result.
6. The exhaust gas temperature sensor malfunction detection method according to claim 5, wherein comparing the first detection value, the second detection value, and the theoretical exhaust gas temperature value to obtain a second comparison result, and determining whether the first exhaust gas temperature sensor malfunctions based on the second comparison result, includes:
calculating the mean value of the first detection value, the second detection value and the theoretical exhaust temperature value to obtain a temperature mean value;
respectively calculating the absolute values of the first detection value, the second detection value and the difference between the theoretical exhaust temperature value and the temperature mean value;
and if the absolute value of the difference between the first detection value and the temperature mean value is greater than or equal to a preset difference threshold value, determining that the first exhaust temperature sensor has a fault.
7. The exhaust temperature sensor malfunction detection method according to any one of claims 3 or 6, characterized by, if the first detection value is equal to a first target value, and the first target value is a system protection threshold value of the air conditioning apparatus, after the determination that the first exhaust temperature sensor is malfunctioning, comprising:
and determining a second target value as a system protection threshold value of the air conditioning equipment, wherein the second target value is smaller than the first target value.
8. The exhaust temperature sensor malfunction detection method according to any one of claims 3 or 6, characterized by, if the first detection value is equal to a third target value, which is a system control value of the air conditioning equipment, after the determination that the first exhaust temperature sensor is malfunctioning, comprising:
determining a fourth target value as a system control value of the air conditioning equipment, and reducing the load of the air conditioning equipment, wherein the fourth target value is smaller than the third target value.
9. An exhaust gas temperature sensor failure detection device, applied to an air conditioning apparatus including a first exhaust gas temperature sensor, comprising:
a first detection value acquisition unit configured to acquire a first detection value that is a detection value obtained by the first exhaust temperature sensor detecting the temperature of the exhaust gas of the air conditioning equipment;
a theoretical exhaust temperature value obtaining unit, configured to obtain a theoretical exhaust temperature value of the air conditioning equipment;
and the fault judgment unit is used for comparing the first detection value with the theoretical exhaust temperature value to obtain a first comparison result, and judging whether the first exhaust temperature sensor has a fault according to the first comparison result.
10. An air conditioning apparatus comprising a first exhaust temperature sensor, a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any one of claims 1 to 8 when executing the computer program.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639398A (en) * | 2021-08-05 | 2021-11-12 | 珠海格力电器股份有限公司 | Protection method of refrigeration system during abnormal exhaust detection of compressor and air conditioning unit |
| CN114252281A (en) * | 2021-08-24 | 2022-03-29 | 佛山市顺德区美的饮水机制造有限公司 | Detection device, control method and control device thereof, and readable storage medium |
| CN114659673A (en) * | 2022-03-14 | 2022-06-24 | 广州市红日燃具有限公司 | Method, device and equipment for detecting faults of firewall of integrated cooker |
| CN115978715A (en) * | 2023-01-03 | 2023-04-18 | 宁波奥克斯电气股份有限公司 | Emergency control method and device for exhaust temperature sensor fault and air conditioner |
| WO2023226595A1 (en) * | 2022-05-23 | 2023-11-30 | 青岛海信日立空调系统有限公司 | Air conditioning system and filth blockage determination method for air conditioning system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563805A (en) * | 2011-12-22 | 2012-07-11 | 广东美的制冷设备有限公司 | Control method for calculating exhaust temperature of compressor of air conditioner |
| CN105628257A (en) * | 2015-12-18 | 2016-06-01 | 潍柴动力股份有限公司 | Method and device for detecting failure of exhaust temperature sensor |
| CN109539475A (en) * | 2018-10-26 | 2019-03-29 | 珠海格力电器股份有限公司 | A kind of method and system judging air-conditioning exhaust gas temperature sensor open circuit fault |
| CN109869955A (en) * | 2019-02-25 | 2019-06-11 | 四川长虹空调有限公司 | Refrigeration system detachment of exhaust temperature sensor detection method and system |
| CN110375888A (en) * | 2019-07-01 | 2019-10-25 | 中国第一汽车股份有限公司 | Diagnostic method, device, vehicle and the storage medium of cooling-water temperature transmitter |
| CN110469953A (en) * | 2019-08-26 | 2019-11-19 | 广东美的制冷设备有限公司 | Detection method, air conditioner and the medium of the exhaust gas temperature sensor of air conditioner |
| KR20200120118A (en) * | 2019-04-11 | 2020-10-21 | 엘지전자 주식회사 | An air conditioner and method for detecting failure of temperature sensor |
-
2020
- 2020-12-21 CN CN202011521798.6A patent/CN112648710B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563805A (en) * | 2011-12-22 | 2012-07-11 | 广东美的制冷设备有限公司 | Control method for calculating exhaust temperature of compressor of air conditioner |
| CN105628257A (en) * | 2015-12-18 | 2016-06-01 | 潍柴动力股份有限公司 | Method and device for detecting failure of exhaust temperature sensor |
| CN109539475A (en) * | 2018-10-26 | 2019-03-29 | 珠海格力电器股份有限公司 | A kind of method and system judging air-conditioning exhaust gas temperature sensor open circuit fault |
| CN109869955A (en) * | 2019-02-25 | 2019-06-11 | 四川长虹空调有限公司 | Refrigeration system detachment of exhaust temperature sensor detection method and system |
| KR20200120118A (en) * | 2019-04-11 | 2020-10-21 | 엘지전자 주식회사 | An air conditioner and method for detecting failure of temperature sensor |
| CN110375888A (en) * | 2019-07-01 | 2019-10-25 | 中国第一汽车股份有限公司 | Diagnostic method, device, vehicle and the storage medium of cooling-water temperature transmitter |
| CN110469953A (en) * | 2019-08-26 | 2019-11-19 | 广东美的制冷设备有限公司 | Detection method, air conditioner and the medium of the exhaust gas temperature sensor of air conditioner |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639398A (en) * | 2021-08-05 | 2021-11-12 | 珠海格力电器股份有限公司 | Protection method of refrigeration system during abnormal exhaust detection of compressor and air conditioning unit |
| CN114252281A (en) * | 2021-08-24 | 2022-03-29 | 佛山市顺德区美的饮水机制造有限公司 | Detection device, control method and control device thereof, and readable storage medium |
| CN114252281B (en) * | 2021-08-24 | 2024-03-12 | 佛山市顺德区美的饮水机制造有限公司 | Detection device, control method and control device thereof, and readable storage medium |
| CN114659673A (en) * | 2022-03-14 | 2022-06-24 | 广州市红日燃具有限公司 | Method, device and equipment for detecting faults of firewall of integrated cooker |
| CN114659673B (en) * | 2022-03-14 | 2023-08-15 | 广州市红日燃具有限公司 | Method, device and equipment for detecting firewall faults of integrated cooker |
| WO2023226595A1 (en) * | 2022-05-23 | 2023-11-30 | 青岛海信日立空调系统有限公司 | Air conditioning system and filth blockage determination method for air conditioning system |
| CN115978715A (en) * | 2023-01-03 | 2023-04-18 | 宁波奥克斯电气股份有限公司 | Emergency control method and device for exhaust temperature sensor fault and air conditioner |
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|---|---|
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