A fault detection method and device for an air conditioner and the air conditioner

Abstract

The application discloses a kind of fault detection method, device and air conditioner of air conditioner, it is related to air conditioning technical field, the fault detection method of the air conditioner includes: in the operation process of air conditioner, high pressure is monitored based on high pressure sensor;When detecting that current high pressure is greater than preset protection pressure, the current operating mode of air conditioner is acquired;When operating mode is any one mode in refrigeration mode, dehumidification mode and heating mode, the operating state of compressor is detected, and whether the air conditioner exists component failure is judged based on the operating state of compressor.The application can automatically determine whether high pressure is too high due to the pressure of unit itself is too high, can avoid fault recurrence and frequently replace unit component to cause unit to appear fault problem, improve fault detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a fault detection method, device, and air conditioner for an air conditioner. Background Technology

[0002] High-pressure sensors are crucial components in air conditioners. By using these sensors to monitor high-pressure levels in real time, air conditioners can precisely control the compressor's output and protect the unit from damage caused by excessively high pressure. Typically, during operation, if the high-pressure exceeds the set shutdown pressure, an alarm will sound and the compressor will shut down. However, high pressure can also occur due to malfunctions in the high-pressure sensor or controller. Current air conditioner fault detection technologies cannot automatically determine whether the excessive high pressure is caused by the unit itself or a sensor / controller malfunction. Troubleshooting relies on reproducing the unit's fault or replacing the controller, but frequent component replacement can lead to other unit problems and reduces fault detection efficiency. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a fault detection method, device, and air conditioner that can automatically determine whether excessively high pressure is caused by excessive pressure within the unit itself. This avoids fault recurrence and frequent replacement of unit components, thus improving fault detection efficiency.

[0004] According to an embodiment of the present invention, a fault detection method for an air conditioner is provided, comprising: monitoring high pressure based on a high pressure sensor during the operation of the air conditioner; when the current high pressure is detected to be greater than a preset protection pressure, obtaining the current operating mode of the air conditioner; when the operating mode is any one of cooling mode, dehumidification mode, and heating mode, detecting the operating status of the compressor, and determining whether there is a component fault in the air conditioner based on the operating status of the compressor.

[0005] By adopting the above technical solution, when a high pressure is detected, the system can determine whether there is a hardware malfunction in the air conditioner based on the air conditioner's operating mode and the compressor's operating status. It can automatically determine whether the high pressure is caused by excessive pressure in the unit itself, thus avoiding fault reproduction and frequent replacement of unit components that could lead to unit malfunctions, thereby improving fault detection efficiency.

[0006] Preferably, the step of determining whether the air conditioner has a component failure based on the operating status of the compressor includes: when the compressor is not running, determining that the high-pressure sensor or controller of the air conditioner is faulty; when the compressor is running, determining whether the air conditioner has a component failure based on the change in the high-pressure.

[0007] By adopting the above technical solution, component failure can be identified when the high pressure is too high and the compressor is not running. Furthermore, when the high pressure is too high and the compressor is running, the possible causes of high pressure changes can be determined based on the changes in high pressure. This can accurately detect whether there is a component hardware failure in the air conditioner and improve the accuracy of fault detection.

[0008] Preferably, the step of determining whether the air conditioner has a component failure based on the change of the high pressure includes: detecting the average high pressure within a first preset time period before the high pressure reaches the preset protection pressure, and determining whether the average high pressure is less than or equal to a first preset pressure; wherein, the first preset pressure is less than the preset protection pressure; when the average high pressure is less than or equal to the first preset pressure, it is determined that the air conditioner has a component failure problem.

[0009] By adopting the above technical solution, the average value of the high pressure is detected, and the relationship between the average high pressure and the first preset pressure is determined. This allows us to determine whether an abnormal change has occurred when the high pressure reaches the preset protection pressure, thus improving the rationality and accuracy of fault detection.

[0010] Preferably, the fault detection method further includes: when the average high pressure is greater than the first preset pressure, detecting the high pressure saturation temperature corresponding to when the current high pressure is greater than the preset protection pressure, and determining whether the air conditioner has a component fault based on the high pressure saturation temperature.

[0011] By adopting the above technical solution, when the average high pressure is greater than the first preset pressure, that is, when the high pressure is in a relatively stable state of change, the presence of component failure can be further determined based on the high pressure saturation temperature, thereby improving the precision of component failure troubleshooting and thus improving the accuracy of high pressure failure cause investigation.

[0012] Preferably, the step of determining whether the air conditioner has a component failure based on the high-pressure saturation temperature includes: obtaining the estimated high-pressure pressure corresponding to the high-pressure saturation temperature, and determining whether the estimated high-pressure pressure is less than or equal to a second preset pressure; wherein the second preset pressure is less than the preset protection pressure; when the estimated high-pressure pressure is less than or equal to the second preset pressure, it is determined that the air conditioner has a component failure problem; when the estimated high-pressure pressure is greater than the second preset pressure, it is determined that the air conditioner does not have a component failure problem.

[0013] By adopting the above technical solution, the corresponding predicted high pressure is determined based on the high pressure saturation temperature, and the relationship between the predicted high pressure and the second preset pressure is judged. It is possible to accurately determine whether the predicted high pressure obtained from the high pressure saturation temperature is close to the actual detected high pressure. In this way, the cause of the current high pressure being too high can be accurately determined, the problem can be avoided from recurring, and the stability of the air conditioner operation can be improved.

[0014] Preferably, the value range of the first preset pressure is preset protection pressure * 0.5 to preset protection pressure * 0.7, and the value range of the second preset pressure is preset protection pressure * 0.6 to preset protection pressure * 0.8.

[0015] Preferably, the fault detection method further includes: when the operating mode is ventilation mode, determining that the high-pressure sensor or controller of the air conditioner is faulty.

[0016] By adopting the above technical solution, when the high pressure of the air conditioner is too high and it is running in ventilation mode, it can be determined that there is a fault in the high pressure sensor or controller, thus realizing accurate troubleshooting of component faults and improving the efficiency of fault diagnosis.

[0017] According to an embodiment of the present invention, another aspect provides a fault detection device for an air conditioner, comprising: a monitoring module, configured to monitor high pressure based on a high pressure sensor during the operation of the air conditioner; an acquisition module, configured to acquire the current operating mode of the air conditioner when the current high pressure is detected to be greater than a preset protection pressure; and a judgment module, configured to detect the operating status of the compressor when the operating mode is any one of cooling mode, dehumidification mode, and heating mode, and to determine whether there is a component fault in the air conditioner based on the operating status of the compressor.

[0018] According to an embodiment of the present invention, another aspect provides an air conditioner including a high-pressure sensor and a controller, the controller including a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method as described in any of the first aspects.

[0019] According to an embodiment of the present invention, another aspect provides a computer-readable storage medium storing a computer program that, when read and executed by a processor, implements the method as described in any of the first aspects.

[0020] The present invention has the following beneficial effects: by detecting a large high pressure, it can determine whether there is a hardware abnormality in the air conditioner based on the air conditioner's operating mode and the compressor's operating status. It can automatically determine whether the high pressure is caused by the unit itself being too high, which can avoid fault reproduction and frequent replacement of unit components that could lead to unit failure, thus improving fault detection efficiency. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0023] Figure 1 A flowchart of a fault detection method for an air conditioner provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a fault detection device for an air conditioner provided by the present invention. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] This embodiment provides a fault detection method for an air conditioner. This method can be applied to air conditioners equipped with a high-pressure sensor, see below. Figure 1 The flowchart shown is for a fault detection method for an air conditioner. This method mainly includes the following steps S102 to S106:

[0028] Step S102: During the operation of the air conditioner, the high pressure is monitored based on the high pressure sensor;

[0029] When the air conditioner is turned on, the high-pressure sensor in the outdoor unit detects the high-pressure value in real time and determines whether the detected current high-pressure has reached the preset protection pressure in real time or periodically.

[0030] Step S104: When the current high pressure is detected to be greater than the preset protection pressure, obtain the current operating mode of the air conditioner;

[0031] When the current high pressure is found to be greater than the preset protection pressure, it indicates that the current high pressure is too high. It is necessary to determine whether the high pressure is due to excessively high pressure of the unit itself or to a hardware failure of the components causing pressure detection failure, and to obtain the current operating mode of the air conditioner.

[0032] Step S106: When the operating mode is any of the cooling mode, dehumidification mode, and heating mode, detect the operating status of the compressor and determine whether there is a component failure in the air conditioner based on the operating status of the compressor.

[0033] If the air conditioner is currently operating in cooling, dehumidification, or heating mode, the operating status of the compressor should be used to determine if there is a hardware fault in the components. If the compressor is not currently running in cooling, dehumidification, or heating mode when high pressure is detected, it indicates that the high pressure is not caused by the operation of the unit. In this case, it can be determined that there is a hardware fault in the unit, which has caused the high pressure detection to fail.

[0034] The fault detection method for air conditioners provided in this embodiment can determine whether there is a hardware abnormality in the air conditioner based on the air conditioner's operating mode and the compressor's operating status when a high pressure is detected. It can automatically determine whether the high pressure is caused by the unit itself being too high, thus avoiding fault reproduction and frequent replacement of unit components that could lead to unit malfunctions, thereby improving fault detection efficiency.

[0035] In one embodiment, this embodiment provides an implementation method for determining whether an air conditioner has a component failure based on the compressor's operating status. The specific steps are as follows:

[0036] Step (1): When the compressor is not running, determine if the high pressure sensor or controller of the air conditioner is faulty;

[0037] When the compressor is not running, it will not cause the unit's high pressure to be too high. Therefore, it can be determined that the current high pressure is caused by a malfunction in the air conditioner's high pressure sensor or controller.

[0038] Step (2): When the compressor is running, determine whether there is a component failure in the air conditioner based on the change of high pressure.

[0039] When the compressor is running, the high pressure change of the unit is usually a smooth curve. If there is a sudden change in the high pressure, it indicates that there is an abnormal change in the high pressure, which may be due to a component failure.

[0040] By identifying component failures when the high pressure is too high and the compressor is not running, and further determining the possible causes of high pressure changes based on high pressure variations when the high pressure is too high and the compressor is running, the system can accurately detect whether there are component hardware failures in the air conditioner, thus improving the accuracy of fault detection.

[0041] In one specific implementation, this embodiment provides an implementation method for determining whether an air conditioner has a component failure based on changes in high pressure. The specific steps are as follows:

[0042] Step 1): Detect the average high pressure within a first preset time period before the high pressure reaches the preset protection pressure, and determine whether the average high pressure is less than or equal to the first preset pressure.

[0043] Wherein, the first preset pressure is less than the preset protection pressure; in a specific embodiment, the value range of the first preset pressure can be preset protection pressure * 0.5 to preset protection pressure * 0.7, and the preferred value is preset protection pressure * 0.6.

[0044] The high-pressure detection values ​​within a previous first preset time period are obtained. The average high-pressure is calculated based on these values ​​to obtain the average high-pressure within the previous first preset time period. The relationship between the average high-pressure and the first preset pressure is then determined to ascertain whether a rapid change occurred in the high-pressure before reaching the preset protection pressure. The first preset time period can range from 2 to 10 seconds, with a preferred value of 5 seconds.

[0045] Step 2): When the average high pressure is less than or equal to the first preset pressure, it is determined that there is a component failure problem in the air conditioner.

[0046] When the previous average high pressure is less than or equal to the first preset pressure, it indicates that the high pressure was previously low, but the high pressure suddenly changed and reached the preset protection pressure in a short period of time. This indicates that the high pressure changed abnormally when it reached the preset protection pressure, which may indicate that there is an abnormal fault in the components (i.e., the high pressure sensor or controller).

[0047] By detecting the average high pressure and determining the relationship between the average high pressure and the first preset pressure, it is possible to determine whether an abnormal change occurred when the high pressure reached the preset protection pressure, thereby improving the rationality and accuracy of fault detection.

[0048] Step 3): When the average high pressure is greater than the first preset pressure, detect the high pressure saturation temperature corresponding to when the current high pressure is greater than the preset protection pressure, and determine whether there is a component failure in the air conditioner based on the high pressure saturation temperature.

[0049] When the average high pressure is greater than the first preset pressure, it indicates that the high pressure is already at a high pressure level before reaching the preset protection pressure. That is, the high pressure is in a relatively stable state of change when it reaches the preset protection pressure. Further detection of the outdoor unit coil temperature when the current high pressure is greater than the preset protection pressure is used to obtain the high pressure saturation temperature. Based on the high pressure saturation temperature, it is further determined whether there is a component failure.

[0050] By further determining whether there is a component failure based on the high-pressure saturation temperature when the average high-pressure is greater than the first preset pressure, i.e. when the high-pressure is in a relatively stable state of change, the precision of troubleshooting component failures is improved, thereby improving the accuracy of troubleshooting the cause of high-pressure failures.

[0051] In one specific implementation, the estimated high pressure corresponding to the high pressure saturation temperature is obtained, and it is determined whether the estimated high pressure is less than or equal to a second preset pressure; wherein, the second preset pressure is less than a preset protection pressure; when the estimated high pressure is less than or equal to the second preset pressure, it is determined that the air conditioner has a component failure problem; when the estimated high pressure is greater than the second preset pressure, it is determined that the air conditioner does not have a component failure problem.

[0052] Since the refrigerant is in a saturated state in the outdoor unit condenser or evaporator during dehumidification, cooling or heating operation of the air conditioner, there is a one-to-one correspondence between the high-pressure saturation temperature and the high-pressure. That is, each high-pressure saturation temperature corresponds to a saturated high-pressure. The saturated high-pressure corresponding to the currently detected high-pressure saturation temperature is determined and recorded as the estimated high-pressure.

[0053] The relationship between the predicted high pressure and the second preset pressure is determined. When the predicted high pressure is less than or equal to the second preset pressure, it indicates that when the actual detected high pressure reaches the preset protection pressure, the predicted high pressure obtained from the high pressure saturation temperature differs significantly from the actual high pressure. The high pressure sensor or controller of the air conditioner may have a hardware failure, resulting in an abnormal detected high pressure.

[0054] When the estimated high pressure is greater than the second preset pressure, it indicates that when the actual detected high pressure reaches the preset protection pressure, the estimated high pressure obtained from the high pressure saturation temperature is close to the actual detected high pressure. There is no component failure problem. In other words, the high pressure is due to abnormal unit operation.

[0055] The second preset pressure is less than the preset protection pressure; the value range of the second preset pressure is preset protection pressure * 0.6 to preset protection pressure * 0.8, and the preferred value is preset protection pressure * 0.7.

[0056] By determining the corresponding predicted high pressure based on the high pressure saturation temperature and judging the relationship between the predicted high pressure and the second preset pressure, it is possible to accurately determine whether the predicted high pressure obtained from the high pressure saturation temperature is close to the actual detected high pressure. This allows for accurate determination of the cause of the current excessively high pressure, preventing the recurrence of subsequent problems and improving the stability of the air conditioner's operation.

[0057] In one embodiment, the method provided in this embodiment further includes: when the operating mode is ventilation mode, determining that the high-pressure sensor or controller of the air conditioner is faulty.

[0058] Since the compressor is not running when the air conditioner is in ventilation mode, no pressure difference is generated, and the high pressure will not exceed the preset protection pressure. By determining that the high pressure sensor or controller is faulty when the high pressure of the air conditioner is too high and it is running in ventilation mode, the fault diagnosis of components is realized, and the efficiency of fault diagnosis is improved.

[0059] The fault detection method for air conditioners provided in this embodiment can quickly pinpoint the problem direction by acquiring the unit's operating mode and compressor operating status; it can accurately pinpoint the cause of the problem by judging whether the high pressure has undergone a large sudden change before reaching the preset protection pressure; it achieves rapid identification of the cause of the fault due to excessively high high pressure, avoiding subsequent problem reproduction and frequent component replacement; it improves the efficiency of problem investigation and reduces the risk of damage to components during the problem investigation process.

[0060] Corresponding to the air conditioner fault detection method provided in the above embodiments, this embodiment of the invention provides an example of applying the above air conditioner fault detection method, which can be specifically performed according to the following steps:

[0061] Step 1: When the current high pressure Pd_now is detected to be greater than or equal to the preset protection high pressure Pd_max at time T0, determine the cause of the excessively high pressure based on the unit's operating mode.

[0062] Step 2: If the unit is operating in ventilation mode, the abnormality of the components (high-voltage sensor or controller) can be identified.

[0063] Since the compressor is not running in ventilation mode, there will be no pressure difference, the unit is in normal condition, and the high pressure of the unit will not exceed the preset protection pressure. Therefore, the fault is determined to be a component.

[0064] Step 3: The unit operates in either cooling or dehumidification mode, determined based on the compressor's operating status.

[0065] If the compressor is not running, the abnormality of the components (high pressure sensor or controller) can be identified.

[0066] If the compressor is running, the determination is made based on the detected high pressure and condenser coil temperature:

[0067] If the average high-pressure value Pd_ave ≤ K1*Pd_max within the previous time period t1, it indicates that an abnormal change in high-pressure was detected, which can lock the abnormality of the component detection, that is, there is a hardware fault in the component of the unit. When the unit is running, the change in high-pressure is a smooth curve when it is normal. If the high-pressure shows a sharp line within a very short time (t1) and goes directly to the preset protection pressure, it proves that the high-pressure has undergone an abnormal rapid change, which is not caused by the operation of the unit.

[0068] If the average high-pressure reading Pd_ave over the previous time interval t1 is greater than K1*Pd_max, it indicates that the detected high-pressure is relatively stable. The high-pressure needs to be estimated based on the condenser tube temperature at time T0, and the difference between the estimated and actual high-pressure needs to be compared.

[0069] If at time T0, the estimated high pressure Pd1 obtained from the condenser tube temperature is ≤ K2*Pd_now, then the component is locked as abnormal.

[0070] If, at time T0, the estimated high-pressure Pd1 obtained from the condenser tube temperature is greater than K2*Pd_now, then the unit's operating status is abnormal.

[0071] During refrigeration operation, the refrigerant is in a saturated state in the condenser, and the high-pressure saturation temperature corresponds to a saturation pressure. Based on the detected saturation temperature (coil temperature), the corresponding estimated high-pressure can be calculated according to the refrigerant's properties. If the estimated high-pressure is close to the actual detected high-pressure, it indicates that the components are not malfunctioning, and the excessively high pressure is due to abnormal unit operation. If the estimated high-pressure differs significantly from the actual detected high-pressure, it can be determined that the pressure detected by the components (sensors or controller) is abnormal, i.e., the components are malfunctioning.

[0072] The value of t1 ranges from 2 to 10 seconds, preferably 5 seconds; the value of K1 ranges from 0.5 to 0.7, preferably 0.6; the value of K2 ranges from 0.6 to 0.8, preferably 0.7.

[0073] Step 4: If the unit is operating in heating mode, determine the appropriate action based on the compressor's operating status.

[0074] If the compressor is not running, the abnormality of the components (high pressure sensor or controller) can be identified.

[0075] If the compressor is running, the determination is made based on the detected high pressure and evaporator coil temperature:

[0076] If the average high pressure detected within the previous time period t1 is Pd_ave≤K1*Pd_max, it indicates that there is an abnormal change in the high pressure detected, which can lock the abnormality of the component detection, that is, there is a component hardware failure in the unit.

[0077] If the average high-pressure value Pd_ave over the previous time interval t1 is greater than K1*Pd_max, it indicates that the detected high-pressure value is relatively stable. The high-pressure value needs to be estimated based on the evaporator tube temperature at time T0, and the difference between the estimated and actual high-pressure values ​​should be compared.

[0078] If at time T0, the estimated high pressure Pd2 obtained from the evaporator tube temperature is ≤ K3 * Pd_now, then the component is locked as abnormal.

[0079] If, at time T0, the estimated high-pressure Pd2 obtained from the evaporator tube temperature is greater than K3*Pd_now, then the unit is operating abnormally.

[0080] The value of K3 is in the range of 0.6 to 0.8, with 0.7 being preferred.

[0081] Corresponding to the air conditioner fault detection method provided in the above embodiments, this invention provides an air conditioner fault detection device, which can be applied to air conditioners, see below. Figure 2 The diagram shows the structure of a fault detection device for an air conditioner. This device includes the following modules:

[0082] Monitoring module 21 is used to monitor high pressure based on a high pressure sensor during the operation of the air conditioner;

[0083] The acquisition module 22 is used to acquire the current operating mode of the air conditioner when the current high pressure is detected to be greater than the preset protection pressure;

[0084] The judgment module 23 is used to detect the operating status of the compressor when the operating mode is any of the cooling mode, dehumidification mode and heating mode, and to determine whether there is a component failure in the air conditioner based on the operating status of the compressor.

[0085] The fault detection device for the air conditioner provided in this embodiment can determine whether there is a hardware abnormality in the air conditioner based on the air conditioner's operating mode and the compressor's operating status when a high pressure is detected. It can automatically determine whether the high pressure is caused by the unit itself being too high, thus avoiding fault reproduction and frequent replacement of unit components that could lead to unit malfunctions, thereby improving fault detection efficiency.

[0086] In one embodiment, the judgment module 23 is used to determine whether the high pressure sensor or controller of the air conditioner is faulty when the compressor is not running; and to determine whether there is a component fault in the air conditioner based on the change in high pressure when the compressor is running.

[0087] In one embodiment, the judgment module 23 is used to detect the average high pressure within a first preset time period before the high pressure reaches the preset protection pressure, and to determine whether the average high pressure is less than or equal to the first preset pressure; wherein, the first preset pressure is less than the preset protection pressure; when the average high pressure is less than or equal to the first preset pressure, it is determined that there is a component failure problem in the air conditioner.

[0088] In one embodiment, the judgment module 23 is used to detect the high pressure saturation temperature corresponding to when the current high pressure is greater than the preset protection pressure when the average high pressure is greater than the first preset pressure, and to determine whether there is a component failure in the air conditioner based on the high pressure saturation temperature.

[0089] In one embodiment, the judgment module 23 is used to obtain the estimated high pressure corresponding to the high pressure saturation temperature and to determine whether the estimated high pressure is less than or equal to the second preset pressure; wherein the second preset pressure is less than the preset protection pressure; when the estimated high pressure is less than or equal to the second preset pressure, it is determined that the air conditioner has a component failure problem; when the estimated high pressure is greater than the second preset pressure, it is determined that the air conditioner does not have a component failure problem.

[0090] In one embodiment, the first preset pressure ranges from preset protection pressure * 0.5 to preset protection pressure * 0.7, and the second preset pressure ranges from preset protection pressure * 0.6 to preset protection pressure * 0.8, with the first preset pressure being less than the second preset pressure.

[0091] In one embodiment, the above-mentioned apparatus further includes:

[0092] The determination module is used to determine whether the high-pressure sensor or controller of the air conditioner is faulty when the operating mode is ventilation mode.

[0093] The fault detection device for the air conditioner provided in this embodiment can quickly pinpoint the problem direction by acquiring the unit's operating mode and the compressor's operating status; it can accurately pinpoint the cause of the problem by judging whether the high pressure has undergone a large sudden change before reaching the preset protection pressure; it achieves rapid identification of the cause of the fault due to excessive high pressure, avoiding subsequent problem recurrence and frequent component replacement; it improves the efficiency of problem investigation and reduces the risk of damage to components during the problem investigation process.

[0094] Corresponding to the fault detection method for air conditioners provided in the above embodiments, this embodiment provides an air conditioner that includes a high-pressure sensor and a controller. The controller includes a computer-readable storage medium storing a computer program and a processor. The computer program is read and executed by the processor to implement the fault detection method for air conditioners provided in the above embodiments.

[0095] This embodiment also provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements the various processes of the above-described air conditioner fault detection method embodiment and achieves the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0096] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0097] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0098] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Regarding the air conditioner fault detection device and air conditioner disclosed in the embodiments, since they correspond to the air conditioner fault detection method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0100] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0101] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A fault detection method for an air conditioner, characterized in that, include: During the operation of the air conditioner, high pressure is monitored based on a high pressure sensor; When the current high pressure is detected to be greater than the preset protection pressure, the current operating mode of the air conditioner is obtained; When the operating mode is any one of the cooling mode, dehumidification mode, and heating mode, the operating status of the compressor is detected, and the air conditioner is judged to have a component failure based on the operating status of the compressor. The step of determining whether the air conditioner has a component failure based on the operating status of the compressor includes: When the compressor is not running, it is determined that the high-pressure sensor or controller of the air conditioner is faulty. When the compressor is running, the air conditioner is judged to have a component failure based on the change of the high pressure. The step of determining whether the air conditioner has a component failure based on the change in the high pressure includes: The average high-pressure pressure within a first preset time period before the high-pressure reaches the preset protection pressure is detected, and it is determined whether the average high-pressure is less than or equal to a first preset pressure, wherein the first preset pressure is less than the preset protection pressure; wherein, when the average high-pressure is less than or equal to the first preset pressure, it is determined that the air conditioner has a component failure; when the average high-pressure is greater than the first preset pressure, the high-pressure saturation temperature corresponding to when the current high-pressure is greater than the preset protection pressure is detected, and the presence of a component failure in the air conditioner is determined based on the high-pressure saturation temperature.

2. The fault detection method as described in claim 1, characterized in that, The step of determining whether the air conditioner has a component failure based on the high-pressure saturation temperature includes: Obtain the estimated high pressure corresponding to the high pressure saturation temperature, and determine whether the estimated high pressure is less than or equal to a second preset pressure; wherein, the second preset pressure is less than the preset protection pressure; When the estimated high pressure is less than or equal to the second preset pressure, it is determined that the air conditioner has a component failure. When the inferred high pressure is greater than the second preset pressure, it is determined that the air conditioner does not have a component failure.

3. The fault detection method as described in claim 2, characterized in that, The first preset pressure ranges from preset protection pressure * 0.5 to preset protection pressure * 0.7, and the second preset pressure ranges from preset protection pressure * 0.6 to preset protection pressure * 0.

8.

4. The fault detection method according to any one of claims 1-3, characterized in that, Also includes: When the operating mode is ventilation mode, it is determined that the high-pressure sensor or controller of the air conditioner is faulty.

5. A fault detection device for an air conditioner, characterized in that, The fault detection device comprising any one of claims 1-4, wherein the fault detection method is implemented according to any one of claims 1-4, and the fault detection device comprises: The monitoring module is used to monitor the high pressure based on a high pressure sensor during the operation of the air conditioner. The acquisition module is used to acquire the current operating mode of the air conditioner when the current high pressure is detected to be greater than the preset protection pressure; The judgment module is used to detect the operating status of the compressor when the operating mode is any one of the cooling mode, dehumidification mode, and heating mode, and to determine whether there is a component failure in the air conditioner based on the operating status of the compressor.

6. An air conditioner, characterized in that, The invention includes a high-pressure sensor and a controller, the controller comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when read and executed by a processor, implements the method as described in any one of claims 1-4.

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