Refrigerant diagnostic methods, devices, air conditioners and storage media

Abstract

This invention belongs to the field of air conditioner technology and discloses a refrigerant diagnostic method, device, air conditioner, and storage medium. The method includes: real-time detection of the current ambient temperature, current compressor frequency, and current current; determining the corresponding current range based on the current compressor frequency and current ambient temperature; comparing the current current with the current range to obtain a comparison result; and determining the refrigerant diagnostic result based on the comparison result. Through this method, the sufficiency of the refrigerant charge is determined by the current value, rather than relying on pressure and temperature to determine the refrigerant state, thus avoiding system misdiagnosis caused by sensor distortion and improving the accuracy of refrigerant diagnostics.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to a refrigerant diagnostic method, apparatus, air conditioner, and storage medium. Background Technology

[0002] Currently, during the use of air conditioners, if the connecting pipes leak or the air conditioner's own piping is damaged and leaks, it will affect the normal performance and operational reliability of the air conditioner. On the other hand, if too much refrigerant is added, it will also cause abnormal operation of the machine.

[0003] Currently, most common refrigerant self-diagnostic technologies use pressure and temperature data to determine whether there is insufficient or excessive refrigerant. This method has the following problems: 1. When the sensor is interfered with, causing detection distortion, it can lead to system misjudgment. Furthermore, some air conditioners do not have pressure sensors and rely solely on temperature for judgment, resulting in low diagnostic accuracy. 2. Refrigerant self-diagnostic control logic that only selects outdoor ambient temperature as a parameter is not very reasonable in the air conditioner's heating mode.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a refrigerant diagnostic method, device, air conditioner, and storage medium, aiming to solve the technical problem of low detection accuracy and diagnostic precision of current refrigerant self-diagnostic technologies that rely on sensors.

[0006] To achieve the above objectives, the present invention provides a refrigerant diagnostic method, the method comprising the following steps:

[0007] Real-time monitoring of current ambient temperature, current compressor frequency, and current current;

[0008] The corresponding current range is determined based on the current compressor frequency and the current ambient temperature.

[0009] The current is compared with the current range to obtain a comparison result;

[0010] The refrigerant diagnostic results are determined based on the comparison results.

[0011] Optionally, the real-time detection of the current ambient temperature includes:

[0012] When the current operating mode is cooling mode, the real-time detected outdoor ambient temperature will be used as the current ambient temperature.

[0013] Optionally, the real-time detection of the current ambient temperature includes:

[0014] When the current working mode is heating mode, the indoor and outdoor ambient temperatures are monitored in real time.

[0015] The average value of the indoor ambient temperature and the outdoor ambient temperature is determined to obtain the average temperature.

[0016] The average temperature is taken as the current ambient temperature.

[0017] Optionally, determining the corresponding current range based on the current compressor frequency and the current ambient temperature includes:

[0018] Based on the current compressor frequency and the current ambient temperature, a preset relationship table is consulted to determine the corresponding first current threshold and second current threshold, wherein the first current threshold is less than the second current threshold.

[0019] The first current threshold is used as the lower limit, and the second current threshold is used as the upper limit to determine the current range.

[0020] Optionally, determining the refrigerant diagnostic result based on the comparison result includes:

[0021] When the comparison result indicates that the current current is greater than the second current threshold, the refrigerant diagnosis result is determined to be excessive refrigerant.

[0022] Optionally, determining the refrigerant diagnostic result based on the comparison result includes:

[0023] When the current operating mode is cooling mode, if the comparison result shows that the current current is less than the first current threshold, then the refrigerant diagnosis result is determined to be insufficient refrigerant.

[0024] Optionally, determining the refrigerant diagnostic result based on the comparison result includes:

[0025] When the current working mode is heating mode, if the comparison result is that the current current is less than the first current threshold, then the current defrosting cycle is recorded.

[0026] The corresponding defrosting cycle threshold is determined based on the detected outdoor ambient temperature.

[0027] Determine whether the current defrost cycle is less than the defrost cycle threshold;

[0028] When the current defrost cycle is less than the defrost cycle threshold, the refrigerant diagnosis result is determined to be insufficient refrigerant.

[0029] Furthermore, to achieve the above objectives, the present invention also proposes a refrigerant diagnostic device, the refrigerant diagnostic device comprising:

[0030] The detection module is used to detect the current ambient temperature, current compressor frequency, and current current in real time.

[0031] The determining module is used to determine the corresponding current range based on the current compressor frequency and the current ambient temperature;

[0032] The comparison module is used to compare the current current with the current range to obtain a comparison result;

[0033] The diagnostic module is used to determine the refrigerant diagnostic result based on the comparison results.

[0034] In addition, to achieve the above objectives, the present invention also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and a refrigerant diagnostic program stored in the memory and executable on the processor, the refrigerant diagnostic program being configured to implement the refrigerant diagnostic method as described above.

[0035] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a refrigerant diagnostic program, which, when executed by a processor, implements the refrigerant diagnostic method as described above.

[0036] In this invention, the sufficiency of the refrigerant charge is determined by the current value, rather than by the pressure and temperature. This avoids misdiagnosis of the system caused by sensor distortion, thereby improving the accuracy of refrigerant diagnosis. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of an air conditioner in the hardware operating environment involved in the embodiments of the present invention;

[0038] Figure 2 This is a flowchart illustrating the first embodiment of the refrigerant diagnostic method of the present invention;

[0039] Figure 3 This is a flowchart illustrating the second embodiment of the refrigerant diagnostic method of the present invention;

[0040] Figure 4 This is a flowchart illustrating the third embodiment of the refrigerant diagnostic method of the present invention;

[0041] Figure 5 This is a schematic diagram illustrating a specific process of an example of the refrigerant diagnosis method of the present invention;

[0042] Figure 6 This is a structural block diagram of the first embodiment of the refrigerant diagnostic device of the present invention.

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0045] Reference Figure 1 , Figure 1 This is a schematic diagram of the air conditioner structure in the hardware operating environment involved in the embodiments of the present invention.

[0046] like Figure 1 As shown, the air conditioner may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0048] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a refrigerant diagnostic program.

[0049] exist Figure 1 In the air conditioner shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the air conditioner of the present invention can be set in the air conditioner. The air conditioner calls the refrigerant diagnostic program stored in the memory 1005 through the processor 1001 and executes the refrigerant diagnostic method provided in the embodiment of the present invention.

[0050] This invention provides a refrigerant diagnostic method, referring to... Figure 2 , Figure 2This is a schematic flowchart of the first embodiment of the refrigerant diagnosis method of the present invention.

[0051] In this embodiment, the refrigerant diagnostic method includes the following steps:

[0052] Step S10: Real-time detection of current ambient temperature, current compressor frequency, and current current.

[0053] It is understood that the execution subject in this embodiment is an air conditioner, which is equipped with multiple sensors. The air conditioner's control unit monitors and acquires the compressor's frequency and current, and acquires temperature information collected by multiple temperature sensors, including at least the current ambient temperature collected by the ambient temperature sensor. In specific implementation, the air conditioner's control unit is set with a sampling period, acquiring sensor data at regular intervals according to the sampling period to achieve real-time data detection.

[0054] Optionally, the real-time detection of the current ambient temperature includes: when the current operating mode is cooling mode, using the real-time detected outdoor ambient temperature as the current ambient temperature.

[0055] It should be noted that the air conditioner includes at least two operating modes: heating mode and cooling mode. In this embodiment, different ambient temperatures are used as parameters for the control process in the heating and cooling modes of the air conditioner, which is more in line with reality. Specifically, when the air conditioner is in cooling mode, the outdoor ambient temperature is used as a parameter for subsequent control.

[0056] Optionally, the real-time detection of the current ambient temperature includes: when the current working mode is heating mode, real-time detection of indoor ambient temperature and outdoor ambient temperature; determining the average value of the indoor ambient temperature and the outdoor ambient temperature to obtain the average temperature; and using the average temperature as the current ambient temperature.

[0057] It should be understood that when the air conditioner is in heating mode, the outdoor ambient temperature and the indoor ambient temperature are taken, and the average value of the two is calculated. This average value is then used as a parameter for subsequent control. Optionally, if the air conditioner is a multi-split air conditioner, the outdoor ambient temperature and the indoor temperature of each operating indoor unit are taken, and the average value of the multiple temperature values ​​is used as a parameter for subsequent control.

[0058] Step S20: Determine the corresponding current range based on the current compressor frequency and the current ambient temperature.

[0059] It should be noted that the control program in this embodiment sets the normal current range corresponding to different ambient temperatures and compressor frequencies. Specifically, the current range is obtained by looking up the current parameter value in a table. Optionally, referring to Table 1, which is a preset current range table for an example, where F is the compressor frequency and T is the ambient temperature, the frequency range to which the current compression frequency belongs and the temperature range to which the current ambient temperature belongs are determined, and the corresponding current range can be determined by looking up Table 1.

[0060] Table 1:

[0061]

[0062] Step S30: Compare the current current with the current range to obtain a comparison result.

[0063] Step S40: Determine the refrigerant diagnostic result based on the comparison results.

[0064] Understandably, the system determines whether the current current I falls within the normal current range obtained from a lookup table, and considers its relationship with the upper and lower limits of the current range. In the specific implementation, for cooling mode: if I is not within the normal current range and I is less than the lower limit of the normal current range, the refrigerant shortage code Ex is displayed; if I is not within the normal current range and I is greater than the upper limit of the normal current range, the refrigerant excess code Ey is displayed. For heating mode: if I is not within the normal current range and I is less than the lower limit of the normal current range, it further determines whether the current defrost cycle is less than the minimum defrost cycle. If so, the refrigerant shortage code Ex is displayed; if I is not within the normal current range and I is greater than the upper limit of the normal current range, the refrigerant excess code Ey is displayed.

[0065] In this embodiment, the sufficiency of the refrigerant charge is determined by the current value, rather than by the pressure and temperature. This avoids misdiagnosis caused by sensor distortion and improves the accuracy of refrigerant diagnosis.

[0066] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the refrigerant diagnostic method of the present invention.

[0067] Based on the first embodiment described above, the refrigerant diagnostic method of this embodiment includes the following in step S20:

[0068] Step S201: Based on the current compressor frequency and the current ambient temperature, query a preset relationship table to determine the corresponding first current threshold and second current threshold, wherein the first current threshold is less than the second current threshold.

[0069] Step S202: Use the first current threshold as the lower limit and the second current threshold as the upper limit to determine the current range.

[0070] It should be understood that the storage unit corresponding to the air conditioner stores a pre-set relationship table, see Table 2 and Table 3 below.

[0071] Table 2:

[0072]

[0073] Table 3:

[0074]

[0075] Table 2 includes the minimum current IMIN (i.e., the first current threshold) corresponding to different ambient temperatures T and different compressor operating frequencies F. Table 3 includes the maximum current IMAX (i.e., the second current threshold) corresponding to different ambient temperatures T and different compressor operating frequencies F. By referring to Tables 2 and 3 with the currently detected T and F, the corresponding minimum current IMIN and maximum current IMAX are obtained, thus constructing the corresponding current range [IMIN, IMAX]. For example, if the currently detected compressor frequency is a and the current ambient temperature is b, and f1≤a<f2、t1≤b<t2, the minimum current is determined to be IMIN22 and the maximum current is IMAX22, constructing the corresponding current range [IMIN22, IMAX22]. Furthermore, after the compressor has been running for a period of time and the system has stabilized, the corresponding minimum current IMIN and maximum current IMAX are obtained by referring to Tables 2 and 3 with the detected T and F.

[0076] It should be noted that in one implementation, the relationship tables for heating and cooling modes are the same; that is, the same preset relationship table is queried in both heating and cooling modes. In another implementation, two sets of preset relationship tables are set up, with the same table style but different content values. When the air conditioner is in heating mode, one set of preset relationship tables is queried based on the detected T and F values; when the air conditioner is in cooling mode, the other set of preset relationship tables is queried based on the detected T and F values.

[0077] Further, step S40 includes: when the comparison result is that the current current is greater than the second current threshold, determining that the refrigerant diagnosis result is excessive refrigerant.

[0078] It should be understood that the second current threshold is the maximum value of the normal current range. If the current is greater than the maximum value of the normal current range, it is diagnosed as excessive refrigerant and a corresponding warning is issued.

[0079] Further, step S40 includes: when the current working mode is cooling mode, if the comparison result is that the current current is less than the first current threshold, then the refrigerant diagnosis result is determined to be insufficient refrigerant.

[0080] It should be noted that the first current threshold is the minimum value of the normal current range. If the air conditioner is in cooling mode and the current current is less than the minimum value of the normal current range, it will be diagnosed as insufficient refrigerant and a corresponding reminder will be issued.

[0081] In this embodiment, a preset relationship table is set up to determine the normal current range corresponding to the compressor frequency and ambient temperature by looking up the table. The sufficiency of the refrigerant charge is determined by comparing the current value with the normal current range. The refrigerant status is not determined by pressure and temperature, thus avoiding system misdiagnosis caused by sensor distortion and improving the accuracy of refrigerant diagnosis.

[0082] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the refrigerant diagnostic method of the present invention.

[0083] Based on the second embodiment described above, step S40 of the refrigerant diagnosis method in this embodiment includes:

[0084] Step S401: When the current working mode is heating mode, if the comparison result is that the current current is less than the first current threshold, then record the current defrosting cycle;

[0085] Step S402: Determine the corresponding defrosting cycle threshold based on the detected outdoor ambient temperature;

[0086] It should be understood that when the air conditioner is in heating mode, it records the outdoor ambient temperature and the current defrost cycle. The program pre-sets the minimum defrost cycle THSMIN (i.e., the defrost cycle threshold) corresponding to different outdoor ambient temperatures. Referring to Table 4, which includes the minimum defrost cycles corresponding to different outdoor ambient temperatures Ta, the corresponding minimum defrost cycle THSMIN can be determined by referring to Table 4 based on the currently detected Ta.

[0087] Table 4:

[0088] Minimize the frost cycle THSMIN1 THSMIN2 THSMIN3 … THSMINm

[0089] In practice, if the air conditioner does not issue a defrost command for a long period of time (e.g., no defrost command is issued within 6 hours), the current defrost cycle THS = +∞ is recorded, at which point the defrost cycle is within the normal range.

[0090] Step S403: Determine whether the current defrost cycle is less than the defrost cycle threshold;

[0091] Step S404: when the current defrosting cycle is less than the defrosting cycle threshold, determining that the refrigerant diagnosis result is insufficient refrigerant.

[0092] It should be noted that, it is determined whether THS < THSMIN holds, if THS ≥ THSMIN, it indicates that the current defrosting cycle is within the normal range, if THS < THSMIN, it indicates that the defrosting cycle is abnormal. When the following conditions are satisfied, the refrigerant diagnosis result is determined to be insufficient refrigerant and a corresponding reminder is issued: the current operation mode is the cooling mode, the current current is less than the minimum current IMIN, and the current defrosting cycle is less than the minimum defrosting cycle THSMIN.

[0093] The following description is given with reference to an example:

[0094] Referring to Table 5, Table 5 is an example defrosting cycle threshold mapping table, the values in the example table are summarized based on a large amount of actual measurement data of air conditioners, and can be applied to most models of air conditioners currently available. For example, when the outdoor ambient temperature Ta = 0°C, the defrosting cycle of a normal machine during heating operation is all greater than or equal to 30min, that is, the minimum defrosting cycle is 30min. If the defrosting cycle of the present air conditioner is 20min, and it is determined that the current value is less than the minimum current in the normal range, it is determined that the refrigerant is insufficient.

[0095] Table 5:

[0096] Minimize the frost cycle 50 40 30 … THSMINm

[0097] Referring to Figure 5 , Figure 5 it is a schematic diagram of a specific flow of an embodiment of the refrigerant diagnosis method of the present invention; after the air conditioner is turned on and operates, it is determined whether the operation mode is the cooling mode or the heating mode, and the minimum current IMIN and the maximum current IMAX are determined through table lookup. In the cooling mode, it is respectively determined whether the current current I < IMIN and I > IMAX hold, when I < IMIN, it is determined that the refrigerant is insufficient, when I > IMAX, it is determined that the refrigerant is excessive; in the heating mode, it is respectively determined whether the current current I < IMIN and I > IMAX hold, when I > IMAX, it is determined that the refrigerant is excessive, when I < IMIN, the minimum defrosting cycle THSMIN is determined through table lookup, it is determined whether THS < THSMIN holds, and when THS < THSMIN, it is determined that the refrigerant is insufficient.

[0098] In this embodiment, the minimum defrosting cycle is introduced as a determination condition, and the current value and the defrosting cycle are considered in the refrigerant diagnosis in the heating mode, which further improves the accuracy of refrigerant determination.

[0099] In addition, an embodiment of the present invention also provides a storage medium, wherein a refrigerant diagnosis program is stored on the storage medium, and the refrigerant diagnosis program, when executed by a processor, implements the refrigerant diagnosis method as described above.

[0100] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0101] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the refrigerant diagnostic device of the present invention.

[0102] like Figure 6 As shown, the refrigerant diagnostic device proposed in this embodiment of the invention includes:

[0103] The detection module 10 is used to detect the current ambient temperature, current compressor frequency, and current current in real time.

[0104] It is understood that the execution subject in this embodiment is an air conditioner, which is equipped with multiple sensors. The air conditioner's control unit monitors and acquires the compressor's frequency and current, and acquires temperature information collected by multiple temperature sensors, including at least the current ambient temperature collected by the ambient temperature sensor. In specific implementation, the air conditioner's control unit is set with a sampling period, acquiring sensor data at regular intervals according to the sampling period to achieve real-time data detection.

[0105] It should be noted that the air conditioner includes at least two operating modes: heating mode and cooling mode. In this embodiment, different ambient temperatures are used as parameters for the control process in the heating and cooling modes, which is more realistic. Specifically, when the air conditioner is in cooling mode, the outdoor ambient temperature is used as a parameter for subsequent control. When the air conditioner is in heating mode, the outdoor ambient temperature and the indoor ambient temperature are taken, and their average value is calculated and used as a parameter for subsequent control. Optionally, if the air conditioner is a multi-split air conditioner, the outdoor ambient temperature and the indoor temperature of each operating indoor unit are obtained, and the average of the multiple temperature values ​​is used as a parameter for subsequent control.

[0106] The determination module 20 is used to determine the corresponding current range based on the current compressor frequency and the current ambient temperature.

[0107] It should be noted that the control program in this embodiment sets the normal current range corresponding to different ambient temperatures and compressor frequencies. Specifically, the current range is obtained by looking up the current parameter value in a table. Optionally, referring to Table 1, which is a preset current range table for an example, where F is the compressor frequency and T is the ambient temperature, the frequency range to which the current compression frequency belongs and the temperature range to which the current ambient temperature belongs are determined, and the corresponding current range can be determined by looking up Table 1.

[0108] Table 1:

[0109]

[0110] The comparison module 30 is used to compare the current current with the current range to obtain a comparison result.

[0111] The diagnostic module 40 is used to determine the refrigerant diagnostic result based on the comparison result.

[0112] Understandably, the system determines whether the current current I falls within the normal current range obtained from a lookup table, and considers its relationship with the upper and lower limits of the current range. In the specific implementation, for cooling mode: if I is not within the normal current range and I is less than the lower limit of the normal current range, the refrigerant shortage code Ex is displayed; if I is not within the normal current range and I is greater than the upper limit of the normal current range, the refrigerant excess code Ey is displayed. For heating mode: if I is not within the normal current range and I is less than the lower limit of the normal current range, it further determines whether the current defrost cycle is less than the minimum defrost cycle. If so, the refrigerant shortage code Ex is displayed; if I is not within the normal current range and I is greater than the upper limit of the normal current range, the refrigerant excess code Ey is displayed.

[0113] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0114] In this embodiment, the sufficiency of the refrigerant charge is determined by the current value, rather than by the pressure and temperature. This avoids misdiagnosis caused by sensor distortion and improves the accuracy of refrigerant diagnosis.

[0115] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0116] In addition, for technical details not described in detail in this embodiment, please refer to the refrigerant diagnosis method provided in any embodiment of the present invention, which will not be repeated here.

[0117] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system 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 system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0118] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0119] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0120] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A refrigerant diagnostic method, characterized in that, The refrigerant diagnostic method includes: Real-time monitoring of current ambient temperature, current compressor frequency, and current current; The corresponding current range is determined based on the current compressor frequency and the current ambient temperature. The current is compared with the current range to obtain a comparison result; The refrigerant diagnostic results are determined based on the comparison results. The real-time detection of the current ambient temperature includes: When the current working mode is heating mode, the indoor and outdoor ambient temperatures are monitored in real time. The average value of the indoor ambient temperature and the outdoor ambient temperature is determined to obtain the average temperature. The average temperature is taken as the current ambient temperature. If the air conditioner is a multi-split air conditioner, obtain the outdoor ambient temperature and the indoor temperature of each indoor unit that is in operation, and take the average of the multiple temperature values ​​as the current ambient temperature.

2. The refrigerant diagnostic method as described in claim 1, characterized in that, The real-time detection of the current ambient temperature includes: When the current operating mode is cooling mode, the real-time detected outdoor ambient temperature will be used as the current ambient temperature.

3. The refrigerant diagnostic method as described in claim 1, characterized in that, The step of determining the corresponding current range based on the current compressor frequency and the current ambient temperature includes: Based on the current compressor frequency and the current ambient temperature, a preset relationship table is consulted to determine the corresponding first current threshold and second current threshold, wherein the first current threshold is less than the second current threshold. The first current threshold is used as the lower limit, and the second current threshold is used as the upper limit to determine the current range.

4. The refrigerant diagnostic method as described in claim 3, characterized in that, Determining the refrigerant diagnostic result based on the comparison results includes: When the comparison result indicates that the current current is greater than the second current threshold, the refrigerant diagnosis result is determined to be excessive refrigerant.

5. The refrigerant diagnostic method as described in claim 3, characterized in that, Determining the refrigerant diagnostic result based on the comparison results includes: When the current operating mode is cooling mode, if the comparison result shows that the current current is less than the first current threshold, then the refrigerant diagnosis result is determined to be insufficient refrigerant.

6. The refrigerant diagnostic method as described in claim 3, characterized in that, Determining the refrigerant diagnostic result based on the comparison results includes: When the current working mode is heating mode, if the comparison result is that the current current is less than the first current threshold, then the current defrosting cycle is recorded. The corresponding defrosting cycle threshold is determined based on the detected outdoor ambient temperature. Determine whether the current defrost cycle is less than the defrost cycle threshold; When the current defrost cycle is less than the defrost cycle threshold, the refrigerant diagnosis result is determined to be insufficient refrigerant.

7. A refrigerant diagnostic device, characterized in that, The refrigerant diagnostic device performs the refrigerant diagnostic method according to any one of claims 1 to 6, and the refrigerant diagnostic device comprises: The detection module is used to detect the current ambient temperature, current compressor frequency, and current current in real time. The determining module is used to determine the corresponding current range based on the current compressor frequency and the current ambient temperature; The comparison module is used to compare the current current with the current range to obtain a comparison result; The diagnostic module is used to determine the refrigerant diagnostic result based on the comparison results.

8. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a refrigerant diagnostic program stored in the memory and executable on the processor, the refrigerant diagnostic program being configured to implement the refrigerant diagnostic method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a refrigerant diagnostic program, which, when executed by a processor, implements the refrigerant diagnostic method as described in any one of claims 1 to 6.

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