Temperature sensor fault detection method and device, air conditioning equipment and storage medium

By judging the actual temperature value and working state of the temperature sensor in the inverter, accurately determining whether the temperature sensor is faulty, the problem of misjudging the fault in extremely low temperature environments is solved, and the detection accuracy is improved.

CN119844866APending Publication Date: 2025-04-18QINGDAO HAIER INTELLIGENT BUILDING TECHNOLOGY CO LTD +4

Patent Information

Application Number
CN202311348448.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-10-17
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

In high latitudes or high altitude areas in winter, the temperature is extremely low, which may exceed the use range of the temperature sensor, causing the inverter to fail to detect the actual temperature normally, and may even be misjudged as a sensor failure.

Method used

A temperature sensor fault detection method is provided, by determining the operating state of the inverter and obtaining the actual temperature value collected by the temperature sensor, it is necessary to determine whether the temperature sensor is faulty. The specific steps include determining whether the actual temperature value is greater than or less than the preset temperature threshold value, and further judgment is made based on the state information of the inverter.

Benefits of technology

It can accurately determine whether the temperature sensor is faulty, avoid temperature areas that the sensor cannot detect, prevent fault misjudgment, and improve the accuracy of fault detection of the temperature sensor.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of air conditioning equipment, particularly provides a temperature sensor fault detection method and device, air conditioning equipment and a storage medium, and aims to solve the technical problem that a frequency converter cannot normally detect the actual temperature at an ultralow temperature and even may misjudge the actual temperature as a sensor fault. In order to achieve the purpose, the temperature sensor fault detection method comprises the steps that the working state of a frequency converter is determined; acquiring an actual temperature value acquired by a temperature sensor; and judging whether the temperature sensor fails based on the working state and the actual temperature value of the frequency converter. Therefore, fault misjudgment of the temperature sensor is avoided, and the fault detection accuracy of the temperature sensor is improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and specifically provides a temperature sensor fault detection method, device, air conditioning equipment and storage medium. Background Art

[0002] At present, in the field of air conditioning heat pumps, the variable frequency compressor in the air conditioning outdoor unit is usually controlled by a frequency converter. The frequency converter is a heat-generating component and needs to be temperature controlled. Generally, an external temperature sensor is used to detect the temperature of the frequency converter's radiator.

[0003] The temperature sensor used in air conditioners is mainly NTC (Negative Temperature Coefficient) thermistor, which uses the characteristic that the resistance of thermistor changes with temperature to detect temperature. The characteristic of NTC thermistor is that its resistance gradually decreases as the temperature rises, and its resistance gradually increases as the temperature decreases. Since air conditioner heat pumps are used in a wide area, in high latitudes or high altitudes in winter, the temperature is extremely low, which will exceed the use range of the temperature sensor. The inverter cannot detect the actual temperature normally, and may even be misjudged as a sensor failure.

[0004] Accordingly, the art needs a new temperature sensor fault detection solution to solve the above problems. Summary of the invention

[0005] In order to overcome the above defects, the present invention is proposed to solve or at least partially solve the above technical problems. The present invention provides a temperature sensor fault detection method, device, air conditioning equipment and storage medium.

[0006] In a first aspect, the present invention provides a temperature sensor fault detection method, which is applied to a frequency converter, wherein a temperature sensor is provided in the frequency converter, and the temperature sensor is used to detect the internal temperature of the frequency converter; the method comprises:

[0007] Determining the operating state of the frequency converter;

[0008] Obtaining an actual temperature value collected by the temperature sensor;

[0009] Whether the temperature sensor is faulty is determined based on the working state of the inverter and the actual temperature value.

[0010] In one embodiment, judging whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value includes:

[0011] When the working state of the frequency converter is running, determining whether the actual temperature value is greater than a first temperature threshold or less than a second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold;

[0012] If the actual temperature value is greater than a first temperature threshold, determining that the temperature sensor is faulty;

[0013] If the actual temperature value is less than the second temperature threshold, the state information of the inverter is obtained, and whether the temperature sensor is faulty is determined based on the state information of the inverter.

[0014] In one embodiment, the state information of the frequency converter includes the output current and operation time of the frequency converter;

[0015] The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the output current of the inverter is greater than a current threshold and the operating time is greater than a preset time.

[0016] In one embodiment, the state information of the frequency converter further includes a duration during which the actual temperature value is less than a second temperature threshold;

[0017] The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the actual temperature value is less than the second temperature threshold for a duration greater than a preset duration.

[0018] In one embodiment, judging whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value includes:

[0019] When the working state of the frequency converter is stopped, determining whether the actual temperature value is greater than a third temperature threshold;

[0020] If so, it is determined that the temperature sensor is faulty.

[0021] In one embodiment, the method further includes: after determining that the temperature sensor fails, controlling the inverter to stop output.

[0022] In one embodiment, the method further includes: after determining that the temperature sensor is faulty, controlling the frequency converter to output alarm information, wherein the alarm information is used to prompt that the temperature sensor is faulty.

[0023] In a second aspect, the present invention provides a temperature sensor fault detection device, the device comprising:

[0024] A determination module, wherein the determination module is configured to determine a working state of the frequency converter;

[0025] An acquisition module, wherein the acquisition module is configured to acquire an actual temperature value collected by a temperature sensor;

[0026] A judgment module is configured to judge whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value.

[0027] In a third aspect, an air conditioning device is provided, which includes at least one processor, at least one storage device and a frequency converter, wherein the storage device is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute any of the temperature sensor fault detection methods described above.

[0028] In a fourth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored in the computer-readable storage medium, wherein the program codes are suitable for being loaded and run by a processor to execute any one of the aforementioned temperature sensor fault detection methods.

[0029] The above one or more technical solutions of the present invention have at least one or more of the following beneficial effects:

[0030] The temperature sensor fault detection method of the present invention specifically includes: determining the working state of the frequency converter; obtaining the actual temperature value collected by the temperature sensor; judging whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value. In this way, it is possible to accurately judge whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value, avoid the temperature area that the temperature sensor cannot detect, prevent the temperature sensor from misjudging the fault, and improve the fault detection accuracy of the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0032] Figure 1 is a schematic flow chart of main steps of a temperature sensor fault detection method according to an embodiment of the present invention;

[0033] Figure 2 is a temperature detection circuit according to an embodiment of the present invention;

[0034] Figure 3 is a complete step flow chart of a temperature sensor fault detection method according to an embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of a main structural block diagram of a temperature sensor fault detection device according to an embodiment of the present invention;

[0036] Figure 5 1 is a schematic structural diagram of a frequency converter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0038] In the description of the present invention, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memories, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", and may include only A, only B, or A and B. The singular terms "one" and "the" may also include plural forms.

[0039] At present, the characteristic of NTC thermistor is that its resistance value gradually decreases with the increase of temperature, and gradually increases with the decrease of temperature. As air conditioning heat pumps are used in a wide area, in winter at high latitudes or high altitudes, the temperature is extremely low, which will exceed the use range of temperature sensors. The inverter cannot detect the actual temperature normally, and may even misjudge it as a sensor failure.

[0040] To this end, the present application proposes a temperature sensor fault detection method, device, air conditioning equipment and storage medium, which are applied to a frequency converter, wherein a temperature sensor is provided inside the frequency converter, and the temperature sensor is used to detect the internal temperature of the frequency converter; specifically including: determining the working state of the frequency converter; obtaining the actual temperature value collected by the temperature sensor; judging whether the temperature sensor is faulty based on the working state and the actual temperature value of the frequency converter. In this way, it is possible to accurately judge whether the temperature sensor is faulty based on the working state and the actual temperature value of the frequency converter, avoid the temperature area that the temperature sensor cannot detect, prevent the misjudgment of the fault of the temperature sensor, and improve the fault detection accuracy of the temperature sensor.

[0041] See attached Figure 1 , Figure 1 The present invention is a schematic flow chart of the main steps of a temperature sensor fault detection method according to an embodiment of the present invention. The method is applied to a frequency converter, wherein a temperature sensor is provided inside the frequency converter, and the temperature sensor is used to detect the internal temperature of the frequency converter.

[0042] like Figure 1 As shown, the temperature sensor fault detection method in the embodiment of the present invention mainly includes the following steps S100 to S300.

[0043] Step S100: Determine the working state of the inverter.

[0044] The working status of the inverter includes two states: stop and run.

[0045] Step S200: Acquire the actual temperature value collected by the temperature sensor.

[0046] Step S300: determining whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value.

[0047] Based on the above steps S100 to S300, the method specifically includes: determining the working state of the inverter; obtaining the actual temperature value collected by the temperature sensor; and judging whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value. In this way, it is possible to accurately judge whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value, avoid the temperature area that the temperature sensor cannot detect, prevent the temperature sensor from misjudging the fault, and improve the fault detection accuracy of the temperature sensor.

[0048] The above steps S200 to S300 are further explained below.

[0049] For step S200, Figure 2 An implementation is shown, in which Figure 2In the temperature detection circuit, RT represents the temperature sensor, whose resistance value can change with temperature, VCC is the power supply voltage of the microcontroller, R1 is the voltage divider resistor, and R2 is the current limiting resistor of the AD sampling pin of the microcontroller. The microcontroller can calculate the resistance value of the temperature sensor RT by collecting the voltage value of R1, and then obtain the corresponding temperature value by means of table lookup. In this way, even at ultra-low ambient temperatures, the detection circuit can accurately detect the temperature value of the inverter's temperature sensor.

[0050] The above is a further description of step S200 , and the following is a further description of step S300 .

[0051] In a specific implementation, judging whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value includes:

[0052] When the working state of the frequency converter is running, determining whether the actual temperature value is greater than a first temperature threshold or less than a second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold;

[0053] If the actual temperature value is greater than a first temperature threshold, determining that the temperature sensor is faulty;

[0054] If the actual temperature value is less than the second temperature threshold, the state information of the inverter is obtained, and whether the temperature sensor is faulty is determined based on the state information of the inverter.

[0055] The first temperature threshold is a maximum temperature threshold obtained in advance through experiments.

[0056] The second temperature threshold is a minimum temperature threshold obtained in advance through experiments.

[0057] Specifically, when the inverter is in operation, first determine whether the actual temperature value is greater than the first temperature threshold. If so, determine that the temperature sensor is faulty. If not, continue to determine whether the actual temperature value is less than the second temperature threshold. If so, obtain the inverter status information, and determine whether the temperature sensor is faulty based on the inverter status information. This is conducive to accurately determining whether the temperature sensor is faulty.

[0058] In a specific implementation, the state information of the frequency converter includes the output current and operation time of the frequency converter;

[0059] The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the output current of the inverter is greater than a current threshold and the operating time is greater than a preset time.

[0060] Specifically, when the actual temperature value is less than the second temperature threshold, the output current and operating time of the inverter are obtained, and it is determined whether the output current of the inverter is greater than the current threshold and whether the operating time is greater than the preset time. When the output current of the inverter is greater than the current threshold and the operating time is greater than the preset time, it is determined that the temperature sensor is faulty.

[0061] The temperature sensor fault diagnosis is performed using the heating principle of the inverter when it is working. When the inverter is working, the internal switching device will generate loss, which is mainly in the form of heat energy. Therefore, the temperature of the inverter will rise. The greater the current output by the inverter, the greater the loss and the higher the temperature. This temperature will be much higher than the ambient temperature. In this way, when the actual temperature value is less than the second temperature threshold, the output current and operating time of the inverter are compared with the corresponding thresholds respectively, so as to accurately determine whether the temperature sensor is faulty.

[0062] In a specific implementation, the state information of the frequency converter further includes a duration during which the actual temperature value is less than a second temperature threshold;

[0063] The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the actual temperature value is less than the second temperature threshold for a duration greater than a preset duration.

[0064] Specifically, when it is determined that the actual temperature value is less than the second temperature threshold, the duration of the actual temperature value being less than the second temperature threshold is further obtained, and when the duration of the actual temperature value being less than the second temperature threshold is greater than a preset duration, it is determined that the temperature sensor is faulty. In this way, it is also possible to accurately determine whether the temperature sensor is faulty based on the duration of the actual temperature value being less than the second temperature threshold.

[0065] In a specific implementation, judging whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value includes:

[0066] When the working state of the frequency converter is stopped, determining whether the actual temperature value is greater than a third temperature threshold;

[0067] If so, it is determined that the temperature sensor is faulty.

[0068] Specifically, when the working state of the frequency converter is stopped, it is determined whether the actual temperature value is greater than the third temperature threshold; if so, it is determined that the temperature sensor is faulty. In this way, a detection solution is provided for sensor faults when the working state of the frequency converter is stopped.

[0069] In a specific implementation, the method further includes: after determining that the temperature sensor is faulty, controlling the frequency converter to stop output.

[0070] Specifically, after determining that the temperature sensor is faulty, the inverter is controlled to stop output, thereby preventing damage to the inverter.

[0071] In a specific implementation, the method further includes: after determining that the temperature sensor is faulty, controlling the frequency converter to output alarm information, wherein the alarm information is used to indicate that the temperature sensor is faulty.

[0072] Specifically, after determining that the temperature sensor is faulty, the inverter is controlled to output an alarm message, wherein the alarm message is used to indicate that the temperature sensor is faulty, thereby prompting relevant staff to take timely response measures to avoid damage or explosion of the inverter due to the temperature sensor failure.

[0073] In a specific embodiment, Figure 3 As shown, the complete solution of the temperature sensor fault detection method can be specifically implemented through the following steps S201-S207.

[0074] Step S201: Determine the operating state of the inverter. When the inverter is running, execute the following step S202. When the inverter is stopped, execute the following step S207.

[0075] Step S202: Determine whether the actual temperature is greater than a first temperature threshold, if so, execute step S203, if not, execute step S204.

[0076] Step S2O3: Temperature sensor failure.

[0077] Step S2O4: Determine whether the actual temperature value is less than the second temperature threshold value, if so, execute step S2O5, if not, return to step S2O1.

[0078] Step S2O5: Determine whether the output current of the inverter is greater than the current threshold, if so, execute step S2O6, if not, return to step S2O1.

[0079] Step S206: Determine whether the operating time of the inverter is greater than the preset time. If so, execute step S203; if not, return to step S201.

[0080] Step S207: Determine whether the actual temperature value is greater than the third temperature threshold value, if so, execute step S203; if not, return to step S201.

[0081] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effects of the present invention, different steps do not have to be performed in such an order. They can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present invention.

[0082] Furthermore, the present invention also provides a temperature sensor fault detection device.

[0083] See attached Figure 4 , Figure 4 It is a main structural block diagram of a temperature sensor fault detection device according to an embodiment of the present invention.

[0084] like Figure 4 As shown, the temperature sensor fault detection device in the embodiment of the present invention mainly includes a determination module 11, an acquisition module 12 and a judgment module 13. In some embodiments, one or more of the determination module 11, the acquisition module 12 and the judgment module 13 can be combined into one module.

[0085] In some embodiments, the determination module 11 may be configured to determine the operating state of the frequency converter.

[0086] The acquisition module 12 may be configured to acquire an actual temperature value collected by a temperature sensor.

[0087] The determination module 13 may be configured to determine whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value.

[0088] In one implementation, the description of the specific implementation functions may refer to steps S100 to S300.

[0089] The temperature sensor fault detection device in the present application specifically comprises a determination module that determines the working state of the frequency converter; an acquisition module that acquires the actual temperature value collected by the temperature sensor; and a judgment module that determines whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value. In this way, it is possible to accurately determine whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value, avoid temperature areas that the temperature sensor cannot detect, prevent misjudgment of the temperature sensor's fault, and improve the fault detection accuracy of the temperature sensor.

[0090] The temperature sensor fault detection device is used to perform Figure 1The temperature sensor fault detection method embodiment shown in the figure has similar technical principles, technical problems solved and technical effects produced. Technicians in this technical field can clearly understand that for the convenience and conciseness of description, the specific working process and related instructions of the temperature sensor fault detection device can refer to the contents described in the embodiment of the temperature sensor fault detection method, which will not be repeated here.

[0091] It is understood by those skilled in the art that the present invention implements all or part of the processes in the method of the above embodiment, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium that can carry the computer program code. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electric carrier signals and telecommunication signals.

[0092] Furthermore, the present invention also provides an air conditioning device. In an embodiment of the air conditioning device according to the present invention, specifically as follows Figure 5 As shown, the air conditioning device includes at least one processor 51, at least one storage device 52 and a frequency converter 53. The storage device 52 can be configured to store a program for executing the temperature sensor fault detection method of the above method embodiment, and the processor 51 can be configured to execute the program in the storage device, which includes but is not limited to the program for executing the temperature sensor fault detection method of the above method embodiment. For ease of explanation, only the part related to the embodiment of the present invention is shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention.

[0093] In the embodiment of the present invention, the air conditioning equipment may be a control device device including various devices. In some possible implementations, the air conditioning equipment may include multiple storage devices and multiple processors. The program for executing the temperature sensor fault detection method of the above method embodiment may be divided into multiple subprograms, each of which may be loaded and run by a processor to execute different steps of the temperature sensor fault detection method of the above method embodiment. Specifically, each subprogram may be stored in different storage devices, and each processor may be configured to execute programs in one or more storage devices to jointly implement the temperature sensor fault detection method of the above method embodiment, that is, each processor executes different steps of the temperature sensor fault detection method of the above method embodiment, to jointly implement the temperature sensor fault detection method of the above method embodiment.

[0094] The above-mentioned multiple processors may be processors deployed on the same device. For example, the above-mentioned air conditioning device may be a high-performance device composed of multiple processors, and the above-mentioned multiple processors may be processors configured on the high-performance device. In addition, the above-mentioned multiple processors may also be processors deployed on different devices.

[0095] Furthermore, the present invention also provides a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium can be configured to store a program for executing the temperature sensor fault detection method of the above method embodiment, and the program can be loaded and run by the processor to implement the above temperature sensor fault detection method. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0096] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0097] It is understood by those skilled in the art that the modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0098] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A temperature sensor fault detection method is applied to a frequency converter, wherein a temperature sensor is provided inside the frequency converter, and the temperature sensor is used to detect the internal temperature of the frequency converter, wherein: The method comprises: Determining the operating state of the frequency converter; Obtaining an actual temperature value collected by the temperature sensor; Whether the temperature sensor is faulty is determined based on the working state of the inverter and the actual temperature value.

2. The temperature sensor fault detection method according to claim 1, characterized in that: The determining whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value includes: When the working state of the frequency converter is running, determining whether the actual temperature value is greater than a first temperature threshold or less than a second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold; If the actual temperature value is greater than a first temperature threshold, determining that the temperature sensor is faulty; If the actual temperature value is less than the second temperature threshold, the state information of the inverter is obtained, and whether the temperature sensor is faulty is determined based on the state information of the inverter.

3. The temperature sensor fault detection method according to claim 2, characterized in that: The state information of the frequency converter includes the output current and operation time of the frequency converter; The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the output current of the inverter is greater than a current threshold and the operating time is greater than a preset time.

4. The temperature sensor fault detection method according to claim 2, characterized in that: The state information of the frequency converter also includes a duration during which the actual temperature value is less than a second temperature threshold; The determining whether the temperature sensor is faulty based on the state information of the inverter includes: determining that the temperature sensor is faulty when the actual temperature value is less than the second temperature threshold value for a duration greater than a preset duration.

5. The temperature sensor fault detection method according to claim 1, characterized in that: The determining whether the temperature sensor is faulty based on the working state of the frequency converter and the actual temperature value includes: When the working state of the frequency converter is stopped, determining whether the actual temperature value is greater than a third temperature threshold; If so, it is determined that the temperature sensor is faulty.

6. The temperature sensor fault detection method according to claim 1, characterized in that: The method further includes: after determining that the temperature sensor fails, controlling the inverter to stop output.

7. The temperature sensor fault detection method according to claim 1, characterized in that: The method further includes: after determining that the temperature sensor is faulty, controlling the frequency converter to output alarm information, wherein the alarm information is used to prompt that the temperature sensor is faulty.

8. A temperature sensor fault detection device, characterized in that: The device comprises: A determination module, wherein the determination module is configured to determine a working state of the frequency converter; An acquisition module, wherein the acquisition module is configured to acquire an actual temperature value collected by a temperature sensor; A judgment module is configured to judge whether the temperature sensor is faulty based on the working state of the inverter and the actual temperature value.

9. An air conditioning device, comprising at least one processor, at least one storage device and a frequency converter, wherein the storage device is suitable for storing a plurality of program codes, wherein: The program code is suitable for being loaded and run by the processor to execute the temperature sensor fault detection method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the temperature sensor fault detection method according to any one of claims 1 to 7.

Citation Information

Patent Citations

  • Air conditioner temperature sensor fault detection method and detection device and air conditioner

    CN110440393A

  • Frequency converter temperature sensor abnormity detection method, frequency converter and storage medium

    CN110702273A

  • Exhaust temperature sensor fault detection method and device and air conditioning equipment

    CN112648710A

  • Method and device for detecting temperature sensor

    CN114993516A

  • Method and apparatus for detecting failure of temperature sensor

    JP2004325110A

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