Air conditioner refrigerant circulation state determination method and device

Abstract

The invention provides an air conditioner refrigerant circulation state determining method and device, and relates to the technical field of air conditioners. The method comprises the steps that an air conditioner is started, and operation parameters of the air conditioner are obtained within a preset detection time period; and based on whether the operation frequency of the compressor in the air conditioner at the first time point reaches the preset frequency value or not, the relation between the current difference value of the current of an outdoor unit of the air conditioner at the third time point and the current of the fourth time point and the corresponding current threshold value is judged, and the refrigerant circulation state of the air conditioner is determined. The refrigerant circulation state is determined based on the operation frequency and the current through the operation parameters obtained in the preset detection time period, effective monitoring of the air conditioner operation state is achieved, air conditioner damage caused by the abnormal air conditioner refrigerant circulation state is avoided, and the accuracy of refrigerant circulation state detection is improved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a method and device for determining the refrigerant circulation state of an air conditioner. Background Art

[0002] In related technologies, for variable-frequency air conditioners, most of the means used to determine whether the compressor lacks refrigerant are achieved by installing a low-pressure pressure switch. That is, when the low-pressure pressure switch is disconnected, it is determined that the compressor lacks refrigerant; otherwise, it is considered normal.

[0003] Although the above method is simple, it requires the installation of a low-pressure pressure switch, which undoubtedly increases the manufacturing cost of the air conditioner. In addition, the more components are installed, the more likely it is to reduce the detection accuracy and reliability, and the operation process is also relatively complex. Summary of the Invention

[0004] This application aims to at least partly solve one of the technical problems in the related technologies.

[0005] To this end, the first object of this application is to propose a method for determining the refrigerant circulation state of an air conditioner.

[0006] The second object of this application is to propose a device.

[0007] The third object of this application is to propose an electronic device.

[0008] The fourth object of this application is to propose a computer-readable storage medium.

[0009] The fifth object of this application is to propose a computer program product.

[0010] To achieve the above object, an embodiment of the first aspect of this application proposes a method for determining the refrigerant circulation state of an air conditioner, including:

[0011] Turn on the air conditioner and obtain the operating parameters of the air conditioner within a preset detection time period;

[0012] Based on whether the operating frequency of the compressor in the air conditioner reaches a preset frequency value at a first time point, determine the relationship between the current difference between the third time point and the fourth time point of the outdoor unit of the air conditioner and the corresponding current threshold, and determine the refrigerant circulation state of the air conditioner;

[0013] Wherein, the first time point is the time point when the compressor completes frequency increase in an ideal state, the third time point is the time point for detecting the refrigerant circulation state, and the fourth time point is the time point before the third time point and spaced from the third time point by a third detection duration.

[0014] Optionally, obtaining the operating parameters of the air conditioner within a preset detection time period includes:

[0015] Obtaining the first frequency of the compressor when the air conditioner runs to the first time point, where the distance between the first time point and the starting time point of the air conditioner is a preset first detection duration;

[0016] Recording the outdoor unit current of the air conditioner between the first time point and the second time point, where the distance between the first time point and the second time point is a preset second detection duration, and the second time point is the time point when the detection ends.

[0017] Optionally, determining the refrigerant circulation state of the air conditioner includes:

[0018] Determining a preset target frequency and selecting a third time point, where the third time point is any time point between the first time point and the second time point;

[0019] Determining a fourth time point according to the third time point and a preset third detection duration, and determining a current difference according to the first outdoor unit current corresponding to the third time point and the second outdoor unit current corresponding to the fourth time point, where the fourth time point is before the third time point and is separated from the third time point by the third detection duration;

[0020] Determining the refrigerant circulation state according to the second frequency corresponding to the third time point, the target frequency, and the current difference.

[0021] Optionally, determining the refrigerant circulation state according to the second frequency, the target frequency, and the current difference includes:

[0022] If the first frequency is less than the target frequency and the current difference is greater than a preset current difference threshold, determining that the refrigerant circulation state is normal;

[0023] If the first frequency is less than the target frequency and the current difference is less than or equal to the preset current difference threshold, determining that the refrigerant circulation state is abnormal;

[0024] If the first frequency is greater than or equal to the target frequency and the current difference is greater than the preset current difference threshold, determining the refrigerant circulation state according to a preset current threshold;

[0025] If the first frequency is greater than or equal to the target frequency and the current difference is less than or equal to the preset current difference threshold, determining that the refrigerant circulation state is abnormal.

[0026] Optionally, determining the refrigerant circulation state according to a preset current value includes:

[0027] If the first outdoor unit current is greater than the current threshold, it is determined that the refrigerant circulation state is normal;

[0028] If the first outdoor unit current is less than or equal to the current threshold, it is determined that the refrigerant circulation state is abnormal.

[0029] Optionally, the method further includes:

[0030] If the temperature difference between the air conditioner inner pipe temperature and the air conditioner inner ring temperature corresponding to the start time point is less than or equal to a preset first temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0031] If the temperature difference between the air conditioner inner pipe temperature and the air conditioner inner ring temperature corresponding to the start time point is greater than a preset first temperature difference threshold, it is determined that the refrigerant circulation state is normal;

[0032] And / or,

[0033] If the temperature difference between the air conditioner outer pipe temperature and the air conditioner outer ring temperature corresponding to the start time point is less than or equal to a preset second temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0034] If the temperature difference between the air conditioner outer pipe temperature and the air conditioner outer ring temperature corresponding to the start time point is greater than a preset second temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0035] And / or,

[0036] If the second frequency is greater than or equal to a preset frequency threshold, it is determined that the refrigerant circulation state is abnormal;

[0037] If the second frequency is less than a preset frequency threshold, it is determined that the refrigerant circulation state is normal.

[0038] And / or,

[0039] If the temperature difference between the minimum value of the air conditioner inner pipe temperature and the air conditioner inner pipe temperature at the start is less than or equal to a preset third temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0040] If the temperature difference between the minimum value of the air conditioner inner pipe temperature and the air conditioner inner pipe temperature at the start is greater than a preset third temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0041] And / or,

[0042] If the temperature difference between the maximum value of the air conditioner outer pipe temperature and the air conditioner outer pipe temperature corresponding to the start time point is less than or equal to a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0043] If the temperature difference between the maximum value of the outdoor pipe temperature of the air conditioner and the outdoor pipe temperature corresponding to the opening time point is greater than a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0044] To achieve the above object, an embodiment of the second aspect of the present application provides an air conditioner refrigerant circulation state determination device, including:

[0045] A parameter acquisition module, configured to turn on the air conditioner and acquire the operating parameters of the air conditioner within a preset detection time period;

[0046] A state determination module, configured to determine the relationship between the difference between the current at the third time point and the current at the fourth time point of the outdoor unit of the air conditioner and the corresponding current threshold based on whether the operating frequency of the compressor in the air conditioner at the first time point reaches a preset frequency value, and determine the refrigerant circulation state of the air conditioner;

[0047] Wherein, the first time point is the time point when the compressor completes frequency increase in an ideal state, the third time point is the time point for detecting the refrigerant circulation state, and the fourth time point is the time point before the third time point and spaced from the third time point by a third detection duration.

[0048] To achieve the above object, an embodiment of the third aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0049] The memory stores computer execution instructions;

[0050] The processor executes the computer execution instructions stored in the memory to implement the method described in any one of the first aspect.

[0051] To achieve the above object, an embodiment of the fourth aspect of the present application provides a computer-readable storage medium, in which computer execution instructions are stored, and when the computer execution instructions are executed by a processor, they are used to implement the method described in any one of the first aspect.

[0052] To achieve the above object, an embodiment of the fifth aspect of the present application provides a computer program product, which when executed by a processor implements the method described in any one of the first aspect.

[0053] The air conditioner refrigerant circulation state determination method, device, electronic device and storage medium provided by the present application determine the refrigerant circulation state based on the operating frequency and current through the operating parameters obtained in the preset detection time period, realizing effective monitoring of the operating state of the air conditioner, avoiding damage to the air conditioner caused by abnormal refrigerant circulation state, and improving the accuracy of detecting the refrigerant circulation state.

[0054] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0055] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the drawings, where:

[0056] Figure 1 is a schematic flow chart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application;

[0057] Figure 2 is a schematic diagram of a data acquisition timeline provided by an embodiment of the present application;

[0058] Figure 3 is a schematic flow chart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application;

[0059] Figure 4 is a schematic flow chart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application;

[0060] Figure 5 is a schematic flow chart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application;

[0061] Figure 6 is a schematic structural diagram of a device for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application. Detailed Embodiments

[0062] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0063] In the case of refrigerant shortage, valve not opened, or leakage, etc., in addition to the conventional judgment of changes in the inner pipe and outer pipe, by judging the changes in the compressor frequency and the current of the outdoor unit, it is possible to timely judge whether there is an abnormality in the refrigerant circulation of the air conditioner system and take compressor shutdown protection.

[0064] Current household air conditioners adopt a lack-of-fluorine judgment and valve cut-off protection function for refrigerant leakage and shortage problems. Generally, the refrigerant circulation situation of the system is determined by judging changes in the inner pipe, outer pipe, and exhaust temperature, etc. This judgment method is affected by the indoor and outdoor environmental temperatures and the judgment time, and it is prone to misjudgment, or the judgment time is slightly long, resulting in a relatively high cavity temperature of the compressor before shutdown protection, and the compressor is easily burned out, and the judgment timeliness is poor.

[0065] In view of this problem, an embodiment of the present application provides a method for determining the refrigerant circulation state of an air conditioner. Figure 1 It is a schematic flowchart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application. As Figure 1 shown, the method includes the following steps:

[0066] Step 101: Turn on the air conditioner and obtain the operating parameters of the air conditioner within a preset detection time period.

[0067] In this embodiment, after the air conditioner is powered on and runs for a period of time for the first time, various operating parameters of the air conditioner are detected, so as to analyze based on these parameters and determine the refrigerant circulation state of the air conditioner.

[0068] Step 102: Based on whether the operating frequency of the compressor in the air conditioner reaches a preset frequency value at a first time point, determine the relationship between the current difference between the third time point and the fourth time point of the outdoor unit of the air conditioner and the corresponding current threshold, and determine the refrigerant circulation state of the air conditioner.

[0069] In this embodiment, the refrigerant, commonly known as the refrigerant, is a working fluid used to transfer heat energy and produce a refrigeration effect in systems such as refrigeration air conditioners. It can be classified into primary refrigerants and secondary refrigerants according to the working method, and can be classified into natural refrigerants and synthetic refrigerants according to the physical properties. In the air conditioner system, the refrigerant transfers heat through evaporation and condensation. Optionally, the refrigerant is at least one of the following: R22, R410A, R32.

[0070] The operating parameters include but are not limited to: current, compressor frequency, external pipe temperature, internal pipe temperature, outer ring temperature, and inner ring temperature.

[0071] Among them, the air conditioner compressor plays a role in compressing and driving the refrigerant in the air conditioner refrigerant circuit. The air conditioner compressor is generally installed in the outdoor unit. The air conditioner compressor extracts the refrigerant from the low-pressure area, compresses it and then sends it to the high-pressure area for cooling and condensation. Heat is dissipated into the air through the radiator fins, and the refrigerant also changes from a gaseous state to a liquid state, and the pressure increases.

[0072] The external pipe temperature refers to the temperature of the condenser. Generally, the temperature of a certain U pipe on the condenser is used to represent the average temperature of the condenser, which is used to fit the high-pressure saturation temperature. The internal pipe temperature refers to the temperature of the evaporator, and the temperature of a certain U pipe is used to replace it like the external pipe. The inner ring temperature is the indoor ambient temperature detected by the air conditioner, and the outer ring temperature is the outdoor ambient temperature detected by the air conditioner.

[0073] Figure 2 It is a schematic diagram of the data acquisition time axis provided by an embodiment of the present application. As Figure 2As shown, the air conditioner is turned on at the start time point and the operating parameters of the air conditioner are collected. After the air conditioner operates for the first detection duration, the first time point is reached. The first time point is the time point when the compressor completes frequency increase under ideal conditions. Then, after another second detection duration, the second time point is reached, and at this time, the collection of operating parameters stops. The operating parameters at all time points between the first time point and the second time point are analyzed to determine the refrigerant circulation state of the air conditioner. The third time point is a time point between the first time point and the second time point, and the third time point is a time point used to detect the refrigerant circulation state. The fourth time point is before the third time point and is separated from the third time point by a third detection duration.

[0074] In this embodiment, the refrigerant circulation state is used to characterize whether the refrigerant in the air conditioner circulates normally in the air conditioner pipeline for refrigeration or heating. If the refrigerant circulation state is abnormal, the reasons for the abnormality may be at least one of the following: 1. The refrigerant in the air conditioner system leaks externally, resulting in insufficient refrigerant circulation in the system; 2. When the weather is very cold, the evaporation amount of the refrigerant is insufficient; 3. The four-way valve does not match the system well, that is, the middle flow rate of the selected four-way valve is large while the system capacity is small; 4. The commutation time of the air conditioner; 5. The circulation in the air conditioner is blocked, and the system is blocked, resulting in too high a high pressure; too low a low pressure, and unable to refrigerate.

[0075] When the refrigerant operation is abnormal, it is necessary to generate a status prompt message to timely remind the user to perform maintenance. If the reminder is not timely, the air conditioner system operates for a long time in the abnormal refrigerant operation state. Since the refrigerant decreases due to leakage, the heat generated by the motor cannot be taken out by the refrigerant; the exhaust temperature will also increase accordingly. When the temperature is too high, the refrigerant begins to thermally decompose, generating acid and water. It will also cause the carbon in the refrigeration oil to be freed, generating carbon deposits; refrigerant leakage will also lead to poor oil return and reduce the service life of the air conditioner.

[0076] This embodiment provides another method for determining the refrigerant circulation state of an air conditioner. Figure 3 It is a schematic flowchart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application. As Figure 3 shown, Figure 1 Step 101 in

[0077] Step 201, obtain the first frequency of the compressor when the air conditioner runs to the first time point, where the distance between the first time point and the start time point of the air conditioner is a preset first detection duration.

[0078] In this embodiment, the moment when the air conditioner is powered on for the first time is the start time point. For a variable-frequency air conditioner, after startup, the compressor will continuously increase the power supply frequency to increase the operating speed of the compressor, so that the compressor can normally compress the refrigerant. In this embodiment, a first detection duration is preset. The time point after the start time point passes through the first detection duration is the first time point. The time period between the start time point and the first time point is the time period during which the air conditioner makes a preset to prepare for normal operation. Therefore, the first time point is the time point when the compressor completes frequency increase under ideal conditions.

[0079] In a possible embodiment, the value range of the first detection duration is 60 - 120 s. Optionally, the value of the first detection duration is 70 s. The time point 70 s after the start time point is the first time point.

[0080] Step 202: Record the outdoor unit current of the air conditioner between the first time point and the second time point. The distance between the first time point and the second time point is a preset second detection duration, and the second time point is the time point when the detection ends.

[0081] In this embodiment, before the first time point, the operating state of the air conditioner compressor is not yet stable, and the operating parameters during this period cannot accurately reflect the operating state of the air conditioner. Therefore, the operating parameters during this period cannot be used as the basis for judging the refrigerant circulation state. After the first time point, the frequency of the air conditioner compressor is stable, and the air conditioner starts normal operation for refrigeration / heating. The operating parameters measured after the first time point can more accurately reflect the refrigerant circulation state in the air conditioner.

[0082] In a possible embodiment, the value range of the second detection duration is 600 - 1200 s. Optionally, the value of the first detection duration is 700 s. The time point 700 s after the first time point is the second time point. Obtain the outdoor unit current of the air conditioner from the first time point until the second time point.

[0083] This embodiment provides another method for determining the refrigerant circulation state of an air conditioner. Figure 4 It is a schematic flowchart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application. As Figure 4 shown, Figure 1 Step 102 in

[0084] Step 301: Determine a preset target frequency and select a third time point, where the third time point is any time point between the first time point and the second time point;

[0085] In this embodiment, after the machine is powered on, the compressor continuously increases the power supply frequency to increase the operating speed of the compressor. The set target frequency is the frequency that the compressor should reach at the first time point.

[0086] Step 302: Determine a fourth time point according to the third time point and a preset third detection duration, and determine a current difference according to the first outdoor unit current corresponding to the third time point and the second outdoor unit current corresponding to the fourth time point, where the fourth time point is a time point before the third time point and is separated from the third time point by the third detection duration;

[0087] In this embodiment, the current change amount is determined by comparing the outdoor unit current at a certain moment with the outdoor unit current before that moment. First, the third time point is selected, and then the fourth time point before the third time point is selected. The duration between the third time point and the fourth time point is the third detection duration.

[0088] Step 303: Determine the refrigerant circulation state according to the second frequency corresponding to the third time point, the target frequency, and the current difference.

[0089] In this embodiment, the second frequency is compared with the target frequency to determine whether the compressor frequency reaches the target frequency at the first time point, and further determine the refrigerant circulation state according to the current difference.

[0090] Optionally, the step 303 of determining the refrigerant circulation state according to the second frequency, the target frequency, and the current difference includes:

[0091] If the first frequency is less than the target frequency and the current difference is greater than a preset current difference threshold, determine that the refrigerant circulation state is normal;

[0092] If the first frequency is less than the target frequency and the current difference is less than or equal to the preset current difference threshold, determine that the refrigerant circulation state is abnormal;

[0093] In this embodiment, if the first frequency is less than the target frequency, it means that the compressor frequency has not reached the target frequency calculated by the program during the frequency increase process. In this case:

[0094] If the outdoor unit current at the third time point - the outdoor unit current at the fourth time point > the current difference threshold. It means that there is no abnormality in the refrigerant circulation, the outdoor unit current increases with the increase of the compressor frequency, the refrigerant circulation is normal, and the air conditioner operates normally.

[0095] If the outdoor unit current at the third time point - the outdoor unit current at the fourth time point ≤ the current difference threshold, it indicates that the refrigerant circulation is abnormal, the refrigerant is missing or the refrigerant valve is not opened, the refrigerant circulation is less, the compressor frequency increases, but the work done does not increase, the outdoor unit current does not increase with the increase of the compressor frequency, and the refrigerant circulation state is abnormal.

[0096] If the first frequency is greater than or equal to the target frequency, and the current difference is greater than the preset current difference threshold, then determine the refrigerant circulation state according to the preset current threshold;

[0097] If the first frequency is greater than or equal to the target frequency, and the current difference is less than or equal to the preset current difference threshold, then determine that the refrigerant circulation state is abnormal.

[0098] In this embodiment, if the first frequency is greater than or equal to the target frequency, it means that the compressor frequency has successfully reached the target frequency calculated by the program during the frequency increase process. In this case:

[0099] If the outdoor unit current at the third time point - the outdoor unit current at the fourth time point > the current difference threshold. It is necessary to compare the outdoor unit current at the third time point with the current threshold to further determine the refrigerant circulation state.

[0100] If the outdoor unit current at the third time point - the outdoor unit current at the fourth time point ≤ the current difference threshold. It indicates that the refrigerant circulation is abnormal, the refrigerant is missing or the refrigerant valve is not opened, the refrigerant circulation is less, the compressor frequency increases, but the work done does not increase, the outdoor unit current does not increase with the increase of the compressor frequency, and the refrigerant circulation state is abnormal.

[0101] Among them, the current difference threshold is a parameter for judging the protection of refrigerant circulation against refrigeration. Optionally, the value range of the current difference threshold is 0.5A - 1A. Optionally, the current difference threshold is 0.6A.

[0102] Optionally, the determining the refrigerant circulation state according to the preset current value includes:

[0103] If the first outdoor unit current is greater than the current threshold, then determine that the refrigerant circulation state is normal;

[0104] If the first outdoor unit current is less than or equal to the current threshold, then determine that the refrigerant circulation state is abnormal.

[0105] In this embodiment, if the first outdoor unit current does not exceed the current threshold, it indicates that the refrigerant circulation is abnormal, there is a pipeline leak at the same time, and the compressor sucks and compresses air. It is necessary to stop the machine immediately; if in this embodiment, if the first outdoor unit current exceeds the current threshold, it indicates that the refrigerant circulation is normal and sufficient, and the air conditioner is running normally.

[0106] In a possible embodiment, in addition to the above judgment criteria (the first frequency, the current difference, the current of the first outdoor unit), the refrigerant circulation state can also be judged based on other criteria in combination. Optionally, the criteria further include at least one of the following: the temperature of the indoor pipe of the air conditioner corresponding to the start time point, the temperature of the inner loop of the air conditioner corresponding to the start time point, the temperature of the outdoor pipe of the air conditioner corresponding to the start time point, the temperature of the outer loop of the air conditioner corresponding to the start time point, the second frequency corresponding to the third time point, the minimum value of the temperature of the indoor pipe of the air conditioner, and the maximum value of the temperature of the outdoor pipe of the air conditioner.

[0107] Optionally, the method further includes:

[0108] If the temperature difference between the temperature of the indoor pipe of the air conditioner corresponding to the start time point and the temperature of the inner loop of the air conditioner is less than or equal to a preset first temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0109] If the temperature difference between the temperature of the indoor pipe of the air conditioner corresponding to the start time point and the temperature of the inner loop of the air conditioner is greater than the preset first temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0110] In a possible embodiment, the first temperature difference threshold is 2°C.

[0111] Optionally, the method further includes:

[0112] If the temperature difference between the temperature of the outdoor pipe of the air conditioner corresponding to the start time point and the temperature of the outer loop of the air conditioner is less than or equal to a preset second temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0113] If the temperature difference between the temperature of the outdoor pipe of the air conditioner corresponding to the start time point and the temperature of the outer loop of the air conditioner is greater than the preset second temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0114] In a possible embodiment, the second temperature difference threshold is 2°C.

[0115] Optionally, the method further includes:

[0116] If the second frequency corresponding to the third time point is greater than or equal to a preset frequency threshold, it is determined that the refrigerant circulation state is abnormal;

[0117] If the second frequency corresponding to the third time point is less than the preset frequency threshold, it is determined that the refrigerant circulation state is normal.

[0118] In a possible embodiment, the value range of the frequency threshold is 30 Hz - 40 Hz. Optionally, the frequency threshold is 35 Hz.

[0119] Optionally, the method further includes:

[0120] If the temperature difference between the minimum value of the air conditioner's inner pipe temperature and the air conditioner's inner pipe temperature corresponding to the startup time point is less than or equal to a preset third temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0121] If the temperature difference between the minimum value of the air conditioner's inner pipe temperature and the air conditioner's inner pipe temperature corresponding to the startup time point is greater than a preset third temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0122] In a possible embodiment, the third temperature difference threshold is 2°C.

[0123] Optionally, the method further includes:

[0124] If the temperature difference between the maximum value of the air conditioner's outer pipe temperature and the air conditioner's outer pipe temperature corresponding to the startup time point is less than or equal to a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is abnormal;

[0125] If the temperature difference between the maximum value of the air conditioner's outer pipe temperature and the air conditioner's outer pipe temperature corresponding to the startup time point is greater than a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is normal.

[0126] In a possible embodiment, the fourth temperature difference threshold is 2°C.

[0127] This embodiment provides another method for determining the refrigerant circulation state of an air conditioner, Figure 5 which is a schematic flowchart of a method for determining the refrigerant circulation state of an air conditioner provided by an embodiment of the present application. As Figure 5 shown, the method includes:

[0128] Step 401, obtain the operating parameters of the air conditioner.

[0129] In this embodiment, the operating parameters include but are not limited to: current, compressor frequency, outer pipe temperature, inner pipe temperature, outer ring temperature, inner ring temperature.

[0130] Step 402, determine whether the operating parameters meet the first condition.

[0131] In this embodiment, the first condition includes two items: the current difference is less than or equal to a preset current difference threshold; or, the first frequency does not reach the target frequency, the current difference is greater than the preset current difference threshold, and the first outer machine current is less than or equal to the current threshold.

[0132] Step 403, determine whether the operating parameters meet the second condition;

[0133] In this embodiment, the second condition is that the temperature difference between the air conditioner's inner pipe temperature corresponding to the startup time point and the air conditioner's inner ring temperature is less than or equal to a preset first temperature difference threshold.

[0134] Step 404, determine whether the operating parameters satisfy the third condition;

[0135] In this embodiment, the third condition is that the temperature difference between the temperature of the outdoor pipe of the air conditioner corresponding to the start time point and the temperature of the outer ring of the air conditioner is less than or equal to a preset second temperature difference threshold.

[0136] Step 405, determine whether the operating parameters satisfy the fourth condition;

[0137] In this embodiment, the fourth condition is that the second frequency corresponding to the third time point is greater than or equal to a preset frequency threshold.

[0138] Step 406, determine whether the operating parameters satisfy the fifth condition;

[0139] In this embodiment, the fifth condition is that the temperature difference between the minimum value of the temperature of the indoor pipe of the air conditioner and the temperature of the indoor pipe of the air conditioner corresponding to the start time point is less than or equal to a preset third temperature difference threshold.

[0140] Step 407, determine whether the operating parameters satisfy the sixth condition;

[0141] In this embodiment, the sixth condition is that the temperature difference between the maximum value of the temperature of the outdoor pipe of the air conditioner and the temperature of the outdoor pipe of the air conditioner corresponding to the start time point is less than or equal to a preset fourth temperature difference threshold.

[0142] As long as any one of the above six conditions is satisfied, it can be determined that the refrigerant cycle state is abnormal. It is necessary to not satisfy all of the above conditions to determine that the refrigerant cycle state is normal.

[0143] To implement the above embodiment, the present application also proposes an air conditioner refrigerant cycle state determination device. Figure 6 The following is a schematic structural diagram of an air conditioner refrigerant cycle state determination device provided by an embodiment of the present application. As Figure 6 shown, the device includes:

[0144] A parameter acquisition module 510, configured to turn on the air conditioner and acquire the operating parameters of the air conditioner within a preset detection time period;

[0145] A state determination module 520, configured to determine the refrigerant cycle state of the air conditioner based on whether the operating frequency of the compressor in the air conditioner at the first time point reaches a preset frequency value, and determining the relationship between the current difference between the third time point and the fourth time point of the outdoor unit of the air conditioner and the corresponding current threshold.

[0146] To implement the above embodiments, the present application also provides an electronic device, including: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided in the foregoing embodiments.

[0147] To implement the above embodiments, the present application also provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the method provided in the foregoing embodiments when executed by a processor.

[0148] To implement the above embodiments, the present application also provides a computer program product including a computer program, which implements the method provided in the foregoing embodiments when executed by a processor.

[0149] The collection, storage, use, processing, transmission, provision, and disclosure of the user's personal information involved in the present application are all in compliance with the provisions of relevant laws and regulations and do not violate public order and good customs.

[0150] It should be noted that personal information from users should be collected for legal and reasonable purposes and not shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after obtaining the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization including authorizing relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others with access to personal information data comply with their privacy policies and procedures.

[0151] The present application anticipates providing embodiments for users to selectively block the use or access of personal information data. That is, the present disclosure anticipates providing hardware and / or software to prevent or block access to such personal information data. Once personal information data is no longer needed, the risk can be minimized by restricting data collection and deleting the data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of users.

[0152] In the descriptions of the foregoing embodiments, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0153] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0154] Any process or method description in a flowchart or described in other ways herein may be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0155] The logic and / or steps represented in the flowchart or otherwise described herein can, for example, be considered as a definitional sequence list of executable instructions for implementing logical functions, which can be embodied specifically in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection portion having one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable medium on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0156] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), and the like.

[0157] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0158] In addition, each functional unit in various embodiments of the present application may be integrated into a processing module, may exist physically alone for each unit, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0159] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for determining the refrigerant circulation state of an air conditioner, characterized in that, it includes the following steps: Turn on the air conditioner and obtain the operating parameters of the air conditioner within a preset detection time period; Based on whether the operating frequency of the compressor in the air conditioner reaches a preset frequency value at the first time point, determine the relationship between the current difference between the third time point and the fourth time point of the outdoor unit of the air conditioner and the corresponding current threshold, and determine the refrigerant circulation state of the air conditioner; Wherein, the first time point is the time point when the compressor completes frequency increase in the ideal state, the third time point is the time point for detecting the refrigerant circulation state, and the fourth time point is the time point before the third time point and spaced from the third time point by a third detection duration.

2. The method according to claim 1, characterized in that, the obtaining the operating parameters of the air conditioner within a preset detection time period includes: Obtain the first frequency of the compressor when the air conditioner runs to the first time point, wherein the distance between the first time point and the start time point of the air conditioner is a preset first detection duration; Record the current of the outdoor unit of the air conditioner between the first time point and the second time point, wherein the distance between the first time point and the second time point is a preset second detection duration, and the second time point is the end time point of the detection.

3. The method according to claim 2, characterized in that, the determining the refrigerant circulation state of the air conditioner includes: Determine a preset target frequency and select a third time point, wherein the third time point is any time point between the first time point and the second time point; Determine the fourth time point according to the third time point and a preset third detection duration, and determine the current difference according to the first outdoor unit current corresponding to the third time point and the second outdoor unit current corresponding to the fourth time point, wherein the fourth time point is the time point before the third time point and spaced from the third time point by a third detection duration; Determine the refrigerant circulation state according to the second frequency corresponding to the third time point, the target frequency and the current difference.

4. The method according to claim 3, characterized in that, the determining the refrigerant circulation state according to the second frequency, the target frequency and the current difference includes: If the first frequency is less than the target frequency and the current difference is greater than a preset current difference threshold, determine that the refrigerant circulation state is normal; If the first frequency is less than the target frequency and the current difference is less than or equal to a preset current difference threshold, determine that the refrigerant circulation state is abnormal; If the first frequency is greater than or equal to the target frequency and the current difference is greater than a preset current difference threshold, determine the refrigerant circulation state according to a preset current threshold; If the first frequency is greater than or equal to the target frequency and the current difference is less than or equal to a preset current difference threshold, determine that the refrigerant circulation state is abnormal.

5. The method according to claim 4, characterized in that, the determining the refrigerant circulation state according to a preset current value includes: If the first outdoor unit current is greater than the current threshold, it is determined that the refrigerant circulation state is normal; If the first outdoor unit current is less than or equal to the current threshold, it is determined that the refrigerant circulation state is abnormal.

6. The method according to any one of claims 1-5, characterized in that, the method further includes: If the temperature difference between the temperature of the indoor pipe of the air conditioner corresponding to the start time point and the indoor ring temperature of the air conditioner is less than or equal to a preset first temperature difference threshold, it is determined that the refrigerant circulation state is abnormal; If the temperature difference between the temperature of the indoor pipe of the air conditioner corresponding to the start time point and the indoor ring temperature of the air conditioner is greater than a preset first temperature difference threshold, it is determined that the refrigerant circulation state is normal; and / or, If the temperature difference between the temperature of the outdoor pipe of the air conditioner corresponding to the start time point and the outdoor ring temperature of the air conditioner is less than or equal to a preset second temperature difference threshold, it is determined that the refrigerant circulation state is abnormal; If the temperature difference between the temperature of the outdoor pipe of the air conditioner corresponding to the start time point and the outdoor ring temperature of the air conditioner is greater than a preset second temperature difference threshold, it is determined that the refrigerant circulation state is normal; and / or, If the second frequency is greater than or equal to a preset frequency threshold, it is determined that the refrigerant circulation state is abnormal; If the second frequency is less than a preset frequency threshold, it is determined that the refrigerant circulation state is normal; and / or, If the temperature difference between the minimum value of the indoor pipe temperature of the air conditioner and the indoor pipe temperature of the air conditioner at the start is less than or equal to a preset third temperature difference threshold, it is determined that the refrigerant circulation state is abnormal; If the temperature difference between the minimum value of the indoor pipe temperature of the air conditioner and the indoor pipe temperature of the air conditioner at the start is greater than a preset third temperature difference threshold, it is determined that the refrigerant circulation state is normal; and / or, If the temperature difference between the maximum value of the outdoor pipe temperature of the air conditioner and the outdoor pipe temperature of the air conditioner corresponding to the start time point is less than or equal to a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is abnormal; If the temperature difference between the maximum value of the outdoor pipe temperature of the air conditioner and the outdoor pipe temperature of the air conditioner corresponding to the start time point is greater than a preset fourth temperature difference threshold, it is determined that the refrigerant circulation state is normal.

7. An air conditioner refrigerant circulation state determination device, characterized in that, includes: a parameter acquisition module, configured to turn on the air conditioner and acquire the operating parameters of the air conditioner within a preset detection time period; a state determination module, configured to determine the relationship between the difference between the current of the outdoor unit of the air conditioner at the third time point and the current at the fourth time point and the corresponding current threshold based on whether the operating frequency of the compressor in the air conditioner at the first time point reaches a preset frequency value, and determine the refrigerant circulation state of the air conditioner; wherein, the first time point is the time point when the compressor completes frequency increase in an ideal state, the third time point is the time point for detecting the refrigerant circulation state, and the fourth time point is the time point before the third time point and spaced from the third time point by a third detection duration.

8. An electronic device, characterized in that, includes: a processor, and a memory communicatively connected to the processor; the memory stores computer execution instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 1-6.

10. A computer program product, characterized in that, it includes a computer program which, when executed by a processor, implements the method according to any one of claims 1-6.

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