A method for identifying and detecting a blockage state of an air conditioner in a cooling mode

Abstract

The application discloses a kind of for air conditioner in refrigeration mode under the jam state identification method, and air conditioner jam state is identified by the following steps: S1, based on the actual operating current of compressor obtained to calculate the actual power of compressor at set compressor frequency, the refrigerant heat transfer temperature difference of compressor at air conditioner set compressor frequency is calculated;S2, when the refrigerant heat transfer temperature difference is greater than the refrigerant heat transfer temperature difference threshold value corresponding to the refrigerant heat transfer temperature difference, the actual power and its corresponding actual power threshold value are used to determine the air conditioner jam state in high power section;And based on the actual power, its corresponding actual power threshold value, actual exhaust temperature and its corresponding exhaust temperature threshold value, the air conditioner jam state in low power section is identified;Compared with prior art, the air conditioner jam state is identified more in detail.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and specifically to a method and detection method for identifying and detecting blockage in air conditioning during cooling mode. Background Technology

[0002] like Figure 1 The air conditioning system includes an indoor unit and an outdoor unit connected to it. The outdoor unit includes a low-pressure valve, a gas-liquid separator, a compressor, a condenser, a filter, a throttling device, and a high-pressure valve, which are connected in sequence. The pipeline between the compressor and the throttling device is the high-pressure section, and the pipeline between the throttling device and the high-pressure valve is the low-pressure section.

[0003] During the manufacturing and assembly of air conditioners, due to unfavorable environments, small amounts of impurities or dust inevitably appear in the piping system. Oxide scale is also easily generated during the welding of various pipe components, making it difficult to guarantee the cleanliness of the pipes. All these minute impurities can easily clog the throttling device in the air conditioner. In addition, due to component failure, poor welding, or operational errors during installation and maintenance, the throttling device may fail to open. At the same time, problems such as complete blockage of the condenser and failure of the low-pressure valve and / or high-pressure valve to open may also occur.

[0004] All of the above problems can lead to blockages in the air conditioning system, preventing the refrigerant from circulating properly and rendering the air conditioner ineffective, resulting in poor cooling performance and a terrible user experience. Furthermore, blockages in the air conditioning system can cause abnormal operation of the air conditioner. If the risks are not detected, reported, and addressed in a timely manner, they can lead to unreliable issues such as excessively high temperatures in the compressor windings, potentially burning out the compressor, or even causing flammable or explosive accidents that could endanger human life.

[0005] Among them, the patent application document with application number CN202011460250.5 discloses a method for detecting blockage in an air conditioning system, which collects and stores the ambient temperature outside the outdoor unit, the opening degree of the electronic expansion valve, the compressor frequency, and the compressor winding temperature in real time, and calculates the rate of change of the ambient temperature outside the outdoor unit ΔT1, the rate of change of the opening degree of the electronic expansion valve ΔV, the rate of change of the compressor frequency ΔF, and the rate of change of the compressor winding temperature ΔT2 within n seconds;

[0006] When ΔT1 is less than the first temperature change rate threshold Th1, and ΔV = 0 and ΔF = 0, compare the relationship between ΔT2 and the second temperature change rate threshold Th2, and determine whether the air conditioning system is blocked based on the comparison results.

[0007] This detection method requires too many parameters for identification, resulting in slow identification speed, lag, and poor performance. It is not suitable for use in air conditioning explosion risk assessment technologies that require accurate and rapid judgment. Furthermore, this detection method can only determine whether the air conditioning system is blocked, but cannot identify the blockage status of different power ranges of the air conditioning system. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for identifying and detecting the blockage state of an air conditioner in cooling mode, as well as an air conditioner, electronic equipment and computer-readable storage medium, so as to solve the problem that the prior art cannot identify the blockage state of different power ranges of the air conditioning system.

[0009] To achieve the above objectives, the first aspect of this application proposes a method for identifying the blockage state of an air conditioner in cooling mode, comprising: acquiring the actual winding temperature, actual exhaust temperature, and actual operating current of the compressor when the air conditioner is operating at a set compressor frequency, and determining the blockage risk level based on a preset threshold for the winding temperature corresponding to the set compressor frequency and the actual winding temperature; when the blockage risk level is high-risk blockage, determining the air conditioner blockage state as high-risk blockage; when the blockage risk level is not high-risk blockage, identifying the air conditioner blockage state through the following steps: S1, calculating based on the acquired actual operating current of the compressor... The compressor's actual power at the set compressor frequency, and the refrigerant heat transfer temperature difference at the set compressor frequency calculated based on the actual winding temperature and actual exhaust temperature of the compressor; S2, when it is determined that the refrigerant heat transfer temperature difference in step S1 is greater than the refrigerant heat transfer temperature difference threshold corresponding to the refrigerant heat transfer temperature difference, the air conditioner blockage state in the high power segment is determined based on the actual power determined in step S1 and its corresponding actual power threshold; and the air conditioner blockage state in the low power segment is identified based on the actual power determined in step S1, its corresponding actual power threshold, the actual exhaust temperature and its corresponding exhaust temperature threshold.

[0010] In a preferred embodiment, step S2, which determines the air conditioner blockage state in the high-power segment based on the actual power determined in step S1 and its corresponding actual power threshold, includes: determining high-power blockage based on the actual power determined in step S1, a first actual power threshold included in the corresponding actual power threshold, and a first power identification rule; when high-power blockage is determined, determining the air conditioner blockage state in the high-power segment based on the actual power determined in step S1 and its corresponding actual power threshold included in the second actual power threshold. Specifically, the high-power segment air conditioner blockage state is determined in a distributed manner: first, high-power blockage is determined, and then the specific high-power segment air conditioner blockage state is determined based on the high-power blockage, resulting in more accurate judgment and a faster operation process.

[0011] In a preferred embodiment, determining the air conditioner blockage state in the high-power segment based on the actual power determined in step S1 and the corresponding actual power threshold, including a second actual power threshold, includes: identifying the high-power segment air conditioner blockage as high-pressure segment blockage based on determining that the actual power determined in step S1 is greater than the second actual power threshold and simultaneously determining multiple actual power values ​​within a previous period of time, as well as the actual power determined in step S1 increasing sequentially in time; and identifying the high-power segment air conditioner blockage as air mixing based on determining that the actual power determined in step S1 is less than the second actual power threshold but greater than the first actual power threshold and simultaneously determining multiple actual power values ​​within a previous period of time, as well as the actual power determined in step S1 fluctuating within a certain range. This allows for more accurate and faster identification of the air conditioner as either high-pressure segment blockage or air mixing.

[0012] In a preferred embodiment, identifying the air conditioning blockage status in the low-power segment based on the actual power, its corresponding actual power threshold, the actual exhaust temperature, and its corresponding exhaust temperature threshold determined in step S1 includes: determining low-power blockage based on the actual power, its corresponding actual power threshold (including a first actual power threshold), and a second power identification rule determined in step S1; when low-power blockage is determined, identifying the air conditioning blockage status in the low-power segment based on the actual power, its corresponding actual power threshold (including a third and a fourth actual power threshold), and the actual exhaust temperature and its corresponding exhaust temperature threshold determined in step S1. Specifically, the low-power segment air conditioning blockage status is determined in a distributed manner. First, low-power blockage is determined, and then the specific air conditioning blockage status in the low-power segment is determined based on the low-power blockage. The determination result is more accurate and the operation process is faster.

[0013] In a preferred embodiment, identifying the low-power segment air conditioning blockage state based on the actual power determined in step S1, its corresponding actual power thresholds (including a third actual power threshold and a fourth actual power threshold), and the actual exhaust temperature and its corresponding exhaust temperature threshold includes: determining it as a first-order low-power blockage based on the actual power determined in step S1 and the third actual power threshold; then identifying the first-order low-power blockage air conditioning blockage state based on the actual exhaust temperature and its corresponding exhaust temperature threshold; and determining it as a second-order low-power blockage based on the actual power determined in step S1 and the third and fourth actual power thresholds; then identifying the second-order low-power blockage air conditioning blockage state based on the actual exhaust temperature and its corresponding exhaust temperature threshold. More detailed identification of the first-order and second-order low-power blockage air conditioning blockage states can be achieved based on the actual power, the third and fourth actual power thresholds, and the actual exhaust temperature and its corresponding exhaust temperature threshold.

[0014] A second aspect of this application provides a method for detecting an air conditioning system, characterized by comprising the following steps:

[0015] The assembly status of the air conditioning system is obtained; the air conditioning blockage status is obtained using the blockage status identification method for air conditioning in cooling mode as described in the first aspect of the present application; and the cause of blockage is detected based on the obtained assembly status and air conditioning blockage status.

[0016] In a preferred embodiment, the detection of the blockage cause based on the acquired assembly status and air conditioner blockage status includes: when the acquired assembly status indicates that an assembly operation has been performed and the acquired air conditioner blockage status is high-power blockage, the blockage cause is detected as a low-pressure valve not being opened or gas being introduced during the assembly stage; when the acquired assembly status indicates that an assembly operation has been performed and the acquired air conditioner blockage status is a first-stage system refrigerant shortage or a first-stage low-pressure section blockage, the blockage cause is detected as a high-pressure valve not being opened; when the acquired assembly status indicates that an assembly operation has been performed and the acquired air conditioner blockage status is a second-stage system refrigerant shortage or a second-stage low-pressure section blockage, the blockage cause is detected as refrigerant leakage caused during the assembly stage; when the acquired assembly status indicates that no assembly operation has been performed... When the acquired air conditioner blockage status is "high-power blockage," the cause of the blockage is detected as a locked motor or a blockage in the high-pressure section. If the acquired assembly status is "no assembly operation" and the acquired blockage status is "high-power blockage," the cause is detected as a locked motor, a blockage in the high-pressure section, aging of the air conditioning system, or improper use leading to decomposition of lubricating oil and refrigerant. If the acquired assembly status is "no assembly operation" and the acquired blockage status is "first-stage system refrigerant shortage" or "first-stage low-pressure section blockage," the cause is detected as a blockage in the throttling device. If the acquired assembly status is "no assembly operation" and the acquired blockage status is "second-stage system refrigerant shortage" or "second-stage low-pressure section blockage," the cause is detected as a leak in the air conditioning system. This method helps to pinpoint the specific cause of the blockage, facilitating quick and easy air conditioner repair.

[0017] A third aspect of this application provides an air conditioner, including a blockage state identification module or a blockage cause determination module. The blockage state identification module implements the blockage state identification method for an air conditioner in cooling mode as described in the first aspect of this application, and the blockage cause determination module implements the air conditioning system detection method as described in the second aspect of this application.

[0018] A fourth aspect of this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements either the blockage state identification method for an air conditioner in cooling mode as described in the first aspect of this application, or the detection method for an air conditioning system as described in the second aspect of this application.

[0019] The fifth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the blockage state identification method for an air conditioner in cooling mode as described in the first aspect of this application, or implements the air conditioning system detection method as described in the second aspect of this application.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This method for identifying blockage status in air conditioning during cooling mode determines the level of blockage risk by using a preset threshold for winding temperature and the actual winding temperature. When the blockage risk level is determined to be high-risk, the air conditioner is immediately shut down for maintenance. If the blockage risk level is determined to be non-high-risk, the relationship between the calculated refrigerant heat transfer temperature difference and the refrigerant heat transfer temperature difference threshold can be used to determine whether it is normal operation or ordinary blockage. When the refrigerant heat transfer temperature difference is determined to be greater than the refrigerant heat transfer temperature difference threshold, which is ordinary blockage, the blockage status of the air conditioner in the low-power segment or the high-power segment can be further identified by the actual power, its corresponding actual power threshold, the actual exhaust temperature, and its corresponding exhaust temperature threshold. This allows for more specific air conditioner blockage status identification, such as high-pressure segment blockage, air mixing, first-order system refrigerant shortage, first-order low-pressure segment blockage, second-order system refrigerant shortage, or second-order low-pressure segment blockage, which helps staff to find the blockage point more quickly.

[0022] 2. The detection method of this air conditioning system combines the air conditioning blockage status identified by the above-mentioned blockage status identification method with the assembly status of the air conditioning system to detect the cause of the blockage. This enables maintenance personnel or users to quickly identify the cause of the blockage and improve the efficiency of subsequent maintenance and handling. Attached Figure Description

[0023] Figure 1 A process flow diagram of an existing air conditioning system in cooling mode;

[0024] Figure 2 This is a control flowchart of a method for identifying blockage status in air conditioning during cooling mode according to the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is further described in detail below through specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] During the manufacturing and assembly of air conditioners, due to unfavorable environments, small amounts of impurities or dust inevitably appear in the piping system. Oxide scale is also easily generated during the welding of various pipe components, making it difficult to guarantee the cleanliness of the pipes. All these minute impurities can easily clog the throttling device in the air conditioner. In addition, due to component failure, poor welding, or operational errors during installation and maintenance, the throttling device may fail to open. At the same time, problems such as complete blockage of the condenser and failure of the low-pressure valve and / or high-pressure valve to open may also occur.

[0027] All of the above problems can lead to blockages in the air conditioning system, preventing the refrigerant from circulating properly and rendering the air conditioner ineffective, resulting in poor cooling performance and a terrible user experience. Furthermore, blockages in the air conditioning system can cause abnormal operation of the air conditioner. If the risks are not detected, reported, and addressed in a timely manner, they can lead to unreliable issues such as excessively high temperatures in the compressor windings, potentially burning out the compressor, or even causing flammable or explosive accidents that could endanger human life.

[0028] Therefore, one embodiment of this application proposes a method for identifying blockage states in air conditioning during cooling mode. This method can determine both actual blockages and abstract blockage states. An abstract blockage state refers to a situation where there is no blockage in the piping, but rather an imbalance in the amount of refrigerant circulating in the air conditioning system. This results in a similar reaction to actual blockages during operation, such as air mixing in the system piping or refrigerant deficiency. Such abstract blockages are difficult to identify otherwise. This method for identifying blockage states in air conditioning systems can accurately distinguish between actual and abstract blockages and can classify them into high-power and low-power categories. The following analysis focuses on the refrigerant circulation process of an air conditioner in cooling mode.

[0029] High-power type:

[0030] High-voltage section blockage E2 (actual blockage)

[0031] A blockage occurred at a certain point in the pipe section between Y2 and J1, which caused the pressure in the high-pressure section of the system pipeline to increase. This increased the compressor load for a period of time, and as the blockage became more severe, its power and temperature continued to rise until the compressor burned out.

[0032] Air has entered the system piping (E3 - Abstract Blockage).

[0033] During the production process of an air conditioning system, air or other "incompressible" gases may be mixed into the system piping when refrigerant is being charged. As a result, during normal use, the compressor will experience a significant increase in load when it compresses these incompressible gases, leading to an increase in power consumption.

[0034] Low power type:

[0035] Low-pressure section blockage E4 (actual blockage)

[0036] The J2-G1 section is blocked, preventing refrigerant from circulating from the outdoor unit to the indoor unit. However, the compressor can still run and draw the remaining refrigerant from the entire G2-Y1 pipe section into the compressor through port Y1. But due to the blockage, there is no refrigerant output from port G2, causing the amount of refrigerant in the J2-G1 pipe section to decrease as more and more refrigerant is drawn, thus reducing the compressor load and causing a decrease in compressor power.

[0037] The system piping is low on refrigerant (E5, abstract blockage).

[0038] During the production and use of air conditioning systems, if the system piping is undercharged or leaks refrigerant, the compressor may still operate normally, but the amount of refrigerant circulating in the system will be lower than the preset standard. This will result in a lower compressor load than the preset value, leading to a decrease in compressor power.

[0039] Specifically, such as Figure 2 This application proposes an embodiment of a method for identifying the blockage state of an air conditioner in cooling mode, comprising: acquiring the actual winding temperature, actual exhaust temperature, and actual operating current of the compressor when the air conditioner is running at a set compressor frequency, and determining the blockage risk level based on a preset threshold for the winding temperature corresponding to the set compressor frequency and the actual winding temperature; when the blockage risk level is high-risk blockage, determining the air conditioner blockage state as high-risk blockage; when the blockage risk level is not high-risk blockage, identifying the air conditioner blockage state through the following steps: S1, calculating the actual power of the compressor at the set compressor frequency based on the acquired actual operating current of the compressor, and calculating the refrigerant heat transfer temperature difference of the compressor at the set compressor frequency based on the acquired actual winding temperature and actual exhaust temperature of the compressor; S2, when it is determined that the refrigerant heat transfer temperature difference in step S1 is greater than the refrigerant heat transfer temperature difference threshold corresponding to the refrigerant heat transfer temperature difference, determining the air conditioner blockage state in the high-power segment based on the actual power determined in step S1 and its corresponding actual power threshold; and identifying the air conditioner blockage state in the low-power segment based on the actual power determined in step S1, its corresponding actual power threshold, the actual exhaust temperature, and its corresponding exhaust temperature threshold.

[0040] The air conditioning blockage conditions in the high-power segment mentioned above include high-pressure blockage and air mixing, while the air conditioning blockage conditions in the low-power segment include refrigerant shortage in the first-order system, blockage in the first-order low-pressure segment, refrigerant shortage in the second-order system, and blockage in the second-order low-pressure segment.

[0041] When the air conditioner is running in cooling mode, if the blockage status is identified as high-risk blockage, high-pressure blockage, air mixing, refrigerant shortage in the first-stage system, low-pressure blockage in the first-stage system, low refrigerant shortage in the second-stage system, or low-pressure blockage in the second-stage system, maintenance personnel or users can quickly take countermeasures based on the identification results.

[0042] Because high-risk blockages are extremely dangerous for air conditioners, if the compressor continues to run when the blockage status is identified as high-risk, it will inevitably lead to a serious accident. Therefore, at this step, the operation must be stopped and the air conditioner must be shut down. It is not necessary to further determine whether there is a blockage. Technicians should be notified as soon as possible for inspection and repair. The air conditioner must not be started until the risk investigation and repair are completed.

[0043] When the air conditioner blockage is identified as a non-high-risk blockage, the air conditioner can continue to run, and then more specific blockage types can be detected, thereby achieving a full assessment of various blockage states and making the handling methods more appropriate.

[0044] The actual winding temperature, actual exhaust temperature, actual operating current of the compressor obtained above, along with the corresponding preset threshold for winding temperature, refrigerant heat transfer temperature difference threshold, and actual power threshold, are all obtained at the same compressor frequency, resulting in smaller errors and more accurate identification of the blockage status.

[0045] To better understand this solution, the above-mentioned method for identifying congestion status will be further explained below.

[0046] First, determining the degree of blockage risk based on the preset threshold for winding temperature corresponding to the set compressor frequency and the actual winding temperature includes:

[0047] The degree of blockage risk is determined based on the actual winding temperature, a preset threshold for winding temperature corresponding to the set compressor frequency, and a preset winding temperature judgment rule; wherein, the preset winding temperature judgment rule is:

[0048]

[0049] Among them, T er T represents the actual winding temperature. er-s A preset threshold is set for the winding temperature.

[0050] When a high-risk blockage is identified, the air conditioner will be shut down for maintenance; when a non-high-risk blockage is identified, the air conditioner can identify other blockage states.

[0051] Specifically, when it is determined that the refrigerant heat transfer temperature difference in step S1 is greater than the refrigerant heat transfer temperature difference threshold corresponding to that temperature difference, the air conditioner is confirmed to be a common blockage. Then, more detailed identification of the blockage state can be carried out, thereby achieving a full judgment of various blockage states and making the handling methods more appropriate.

[0052] because:

[0053] 1. When the high-pressure section is blocked, the refrigerant flow decreases, the motor stalls, or the winding temperature rises very quickly after the high-pressure section is blocked, which will inevitably cause the refrigerant heat transfer temperature difference to increase.

[0054] 2. After air is mixed in, the air cannot cool the compressor cavity, which will inevitably cause the temperature difference for heat transfer of the refrigerant to rise.

[0055] 3. Less air intake into the compressor cavity reduces the overall refrigerant circulation, resulting in poorer cooling of the compressor cavity. This causes the compressor winding temperature to rise. However, when the refrigerant is discharged from the compressor, it is quickly cooled by the ambient temperature in the copper pipes before reaching the exhaust temperature sensor located at the rear. This results in the exhaust temperature being lower than the actual winding temperature, inevitably causing an increase in the refrigerant heat transfer temperature difference (the same applies when there is a shortage of refrigerant in the air conditioning system piping).

[0056] When it is determined that the refrigerant heat transfer temperature difference in step S1 is less than the refrigerant heat transfer temperature difference threshold corresponding to that temperature difference, the air conditioner blockage state is identified as normal operation.

[0057] In this embodiment: specifically, the air conditioner blockage state is identified as normal operation or ordinary blockage based on the refrigerant heat transfer temperature difference in step S1, the refrigerant heat transfer temperature difference threshold corresponding to the refrigerant heat transfer temperature difference, and a preset refrigerant heat transfer temperature difference judgment rule; wherein the preset refrigerant heat transfer temperature difference judgment rule is:

[0058]

[0059] Wherein, the T td For the refrigerant heat transfer temperature difference, T td-s The temperature difference threshold for heat transfer in the refrigerant.

[0060] Further, in step S2, determining the air conditioner blockage state in the high-power range based on the actual power determined in step S1 and its corresponding actual power threshold includes: determining high-power blockage based on the actual power determined in step S1, a first actual power threshold included in the corresponding actual power threshold, and a first power identification rule; when high-power blockage is determined, determining the second actual power threshold (P) included in the actual power determined in step S1 and its corresponding actual power threshold... er-sh1The method for determining the air conditioner blockage status in the high-power segment includes: determining the air conditioner blockage status in the high-power segment based on the actual power determined in step S1 and the second actual power threshold included in the corresponding actual power threshold; identifying the air conditioner blockage status in the high-power segment as high-pressure segment blockage based on: determining that the actual power determined in step S1 is greater than the second actual power threshold and obtaining multiple actual power values ​​within a previous period of time at the current moment, and identifying multiple actual power values ​​simultaneously, and identifying the actual power determined in step S1 as fluctuating within a certain range based on: determining that the actual power determined in step S1 is less than the second actual power threshold but greater than the first actual power threshold and obtaining multiple actual power values ​​within a previous period of time at the current moment, and identifying multiple actual power values ​​simultaneously, and identifying the actual power determined in step S1 as fluctuating within a certain range based on: identifying the air conditioner blockage status in the high-power segment as air mixing.

[0061] Furthermore, the step of identifying the air conditioning blockage state in the low-power segment based on the actual power, its corresponding actual power threshold, the actual exhaust temperature, and its corresponding exhaust temperature threshold determined in step S1 includes: determining low-power blockage based on the actual power, its corresponding actual power threshold (including a first actual power threshold), and a second power identification rule determined in step S1; when low-power blockage is determined, identifying the air conditioning blockage state in the low-power segment based on the actual power, its corresponding actual power threshold (including a third actual power threshold and a fourth actual power threshold), the actual exhaust temperature, and its corresponding exhaust temperature threshold determined in step S1. The step of identifying the air conditioning blockage state in the low-power segment based on the actual power determined in step S1, its corresponding actual power thresholds including the third and fourth actual power thresholds, and the actual exhaust temperature and its corresponding exhaust temperature threshold includes: determining it as a first-order low-power blockage based on the actual power determined in step S1 and the third actual power threshold; then identifying the air conditioning blockage state of the first-order low-power blockage based on the actual exhaust temperature and its corresponding exhaust temperature threshold; and determining it as a second-order low-power blockage based on the actual power determined in step S1 and the third and fourth actual power thresholds; then identifying the air conditioning blockage state of the second-order low-power blockage based on the actual exhaust temperature and its corresponding exhaust temperature threshold.

[0062] Specifically, the first power identification rule and the second power identification rule are the same identification rule, as follows:

[0063]

[0064] Wherein, P W For actual power, P er-sh This is the first actual power threshold.

[0065] The determination of first-order low-power congestion is based on the actual power determined in step S1, the third actual power threshold, and the preset low-power congestion judgment rule.

[0066] The determination of second-order low-power congestion is based on the actual power, third actual power threshold, fourth actual power threshold determined in step S1, and the preset low-power congestion judgment rules.

[0067] The preset low-power congestion judgment rule is as follows:

[0068]

[0069] Wherein, P W For actual power, P er-sl1 P is the third actual power threshold. er-sl This is the fourth actual power threshold.

[0070] In the above: the air conditioner blockage state of first-order low-power blockage or second-order low-power blockage is further identified based on the actual exhaust temperature and its corresponding exhaust temperature threshold. This identification is based on the actual exhaust temperature, its corresponding exhaust temperature threshold, and a preset compressor exhaust temperature judgment rule. The preset compressor exhaust temperature judgment rule is as follows:

[0071]

[0072] Wherein, the T ex T represents the actual exhaust temperature. ex-s This is the exhaust temperature threshold.

[0073] Low-power blockage assesses the severity of the air conditioning system's hazard level based on the magnitude of the power reduction. If it is a first-order low-power blockage, it indicates that the system may have a problem that requires maintenance, and the user needs to resolve it as soon as possible. If it is a second-order low-power blockage, it may be a power reduction problem caused by environmental issues, with a smaller reduction that is still within the normal range and can be used with minimal effort.

[0074] This blockage identification method generates a fault code in the air conditioner when it identifies high-risk blockage, high-pressure blockage, air mixing, refrigerant shortage in the first-order system, blockage in the first-order low-pressure section, refrigerant shortage in the second-order system, or blockage in the second-order low-pressure section. Specifically, the fault code E1 corresponds to high-risk blockage, E2 to high-pressure blockage, E3 to air mixing, E41 to both first-order and second-order low-pressure blockage, and E51 to both first-order and second-order refrigerant shortage.

[0075] Based on a method for identifying blockage status in air conditioning during cooling mode, another embodiment of this application also designs a system self-test strategy, specifically a detection method for an air conditioning system including the following steps:

[0076] The assembly status of the air conditioning system is obtained; the air conditioning blockage status is obtained using the blockage status identification method for air conditioning in cooling mode described in the above embodiments; and the cause of blockage is detected based on the obtained assembly status and air conditioning blockage status.

[0077] The method of detecting the cause of blockage based on the acquired assembly status and air conditioner blockage status includes: when the acquired assembly status indicates that assembly operation has been performed and the acquired air conditioner blockage status is high-power blockage, the blockage cause is detected as the low-pressure valve being forgotten to be opened or gas being introduced during the assembly stage; when the acquired assembly status indicates that assembly operation has been performed and the acquired air conditioner blockage status is a first-stage system refrigerant shortage or a first-stage low-pressure section blockage, the blockage cause is detected as the high-pressure valve being forgotten to be opened; when the acquired assembly status indicates that assembly operation has been performed and the acquired air conditioner blockage status is a second-stage system refrigerant shortage or a second-stage low-pressure section blockage, the blockage cause is detected as refrigerant leakage caused during the assembly stage; when the acquired assembly status indicates that no assembly operation has been performed and the acquired air conditioner blockage status is high-power .... The following methods are used to detect blockages: 1) High-power blockage: If the detected blockage is a high-power blockage, the cause is a locked motor or a high-pressure blockage. 2) No assembly is performed and the blockage is still high-power, the cause is a locked motor, a high-pressure blockage, or aging of the air conditioning system due to improper use leading to decomposition of lubricating oil and refrigerant. 3) No assembly is performed and the blockage is a first-stage system refrigerant shortage or a first-stage low-pressure blockage, the cause is a blocked throttling device. 4) No assembly is performed and the blockage is a second-stage system refrigerant shortage or a second-stage low-pressure blockage, the cause is a leak in the air conditioning system.

[0078] Specifically:

[0079] The air conditioner has a status bit data F_as. Whenever the air conditioner undergoes any assembly operation that alters the system piping, such as installation, disassembly, or repair, its F_as value will be set to 1, indicating that the air conditioning system is currently in the trial phase after preparation. When the air conditioning system is started again, this F_as = 1 will remain for a period of time until a certain usage period is reached, at which point F_as will be set to 0. If another assembly operation such as "installation, disassembly, repair, or preparation" occurs within this time period, the time during which F_as is set to 1 will be reset.

[0080] Specifically, when the assembly status indicates that an assembly operation has been performed, the status bit data F_as in the air conditioner is assigned a value of 1; when the assembly status indicates that no assembly operation has been performed, the status bit data F_as in the air conditioner is assigned a value of 0; this facilitates subsequent retrieval and use.

[0081] When the air conditioning system receives status bit data F_as = 1

[0082] If the air conditioning system is identified as E2, the fault code of the air conditioning system will change to E21, which indicates that the fault of the air conditioning system at this time is that the low pressure valve was not opened.

[0083] If the air conditioning system is identified as E3, the fault code will change to E31, which means that air or other non-compliant gases were mixed in during the air conditioning assembly process, reminding relevant personnel to check their own actions.

[0084] If the air conditioning system is identified as E41 / E42, then the fault code of the air conditioning system becomes E411 / E421, which indicates that the fault at this time is that the high pressure valve was not opened.

[0085] If the air conditioning system is identified as E51 / E52, the fault code will change to E511, indicating that a refrigerant leak occurred during the air conditioning assembly process.

[0086] When the air conditioning system receives status bit data F_as = 0

[0087] If the air conditioning system is identified as E2, the fault code of the air conditioning system will change to E22, which indicates that the fault is that the motor is stuck or there is a blockage in the high-pressure section of Y2-J1, reminding personnel to check and repair.

[0088] If the air conditioning system is identified as E3, the fault code will change to E32, indicating that the air conditioning system itself is aging, for example, a gap appears on the low-pressure side, causing air to enter; or improper use causes the lubricating oil and refrigerant (ammonia) to decompose into non-condensable gas, which can also be called "air".

[0089] If the air conditioning system is identified as E41 / E42, the fault code of the air conditioning system will become E412 / E422, which indicates that the throttling device of the air conditioning system is completely or partially blocked at this time.

[0090] If the air conditioning system is identified as E51 / E52, the fault code will change to E512 / E522, indicating that the air conditioning system piping has leaks due to aging, resulting in refrigerant leakage.

[0091] Specifically, by determining whether the air conditioning system is newly installed or has been in stable use for some time, the different causes of various blockages can be identified, enabling maintenance personnel or users to quickly identify the causes of blockages and improve the efficiency of subsequent maintenance and handling.

[0092] To implement the above embodiments, another embodiment of this application proposes an air conditioner, including a blockage state identification module or a blockage cause determination module. The blockage state identification module implements the blockage state identification method for the air conditioner in cooling mode as described in the above embodiments, and the blockage cause determination module implements the detection method for the air conditioning system as described in the above embodiments.

[0093] To implement the above embodiments, another embodiment of this application proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the blockage state identification method for an air conditioner in cooling mode as described in the above embodiments or the detection method for an air conditioning system as described in the above embodiments.

[0094] To implement the above embodiments, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the blockage state identification method or the fault early warning method of the air conditioning system described in the above embodiments.

[0095] The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0096] This disclosure also provides a computer program product carrying program code. The program code includes instructions that can be used to execute the steps of the air conditioning system blockage state identification method or the air conditioning system fault early warning method described in the above method embodiments. For details, please refer to the above method embodiments, which will not be repeated here.

[0097] The aforementioned computer program product can be implemented through hardware, software, or a combination thereof. In one optional embodiment, the computer program product is specifically embodied in a computer storage medium; in another optional embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0098] It is understood that before using the technical solutions disclosed in the various embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0099] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. In the several embodiments provided in this disclosure, it should be understood that the disclosed air conditioners, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division; in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0100] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0101] In addition, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0102] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes: USB flash drives, portable hard drives, and read-only memory (ROM).

[0103] Various media that can store program code, such as memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0104] Finally, it should be noted that the above-described embodiments are merely specific implementations of this disclosure, used to illustrate the technical solutions of this disclosure, and not to limit it. The protection scope of this disclosure is not limited thereto. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this disclosure. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure, and should all be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be determined by the protection scope of the claims.

Claims

1. A method for identifying blockage status in an air conditioner during cooling mode, characterized in that, include: The actual winding temperature, actual exhaust temperature, and actual operating current of the compressor are obtained when the air conditioner is running at a set compressor frequency. Based on the preset threshold of the winding temperature corresponding to the set compressor frequency and the actual winding temperature, the degree of blockage risk is determined. When the level of blockage risk is high-risk blockage, the air conditioning blockage status is determined to be a high-risk blockage status; When the blockage risk level is not high-risk, the air conditioning blockage status is identified through the following steps: S1. Calculate the actual power of the compressor at the set compressor frequency based on the actual operating current of the compressor, and calculate the refrigerant heat transfer temperature difference of the compressor at the set compressor frequency of the air conditioner based on the actual winding temperature and actual discharge temperature of the compressor. S2. When it is determined that the refrigerant heat transfer temperature difference in step S1 is greater than the refrigerant heat transfer temperature difference threshold corresponding to the refrigerant heat transfer temperature difference, the air conditioner blockage state in the high power segment is determined based on the actual power determined in step S1 and its corresponding actual power threshold; and the air conditioner blockage state in the low power segment is identified based on the actual power determined in step S1, its corresponding actual power threshold, the actual exhaust temperature and its corresponding exhaust temperature threshold. The determination of the air conditioning blockage state in the high-power range in step S2, based on the actual power determined in step S1 and its corresponding actual power threshold, includes: Based on the actual power determined in step S1, the first actual power threshold included in the corresponding actual power threshold, and the first power identification rule, it is determined to be a high-power blockage; When it is determined to be a high-power blockage, the air conditioning blockage state in the high-power segment is determined based on the actual power determined in step S1 and the second actual power threshold included in the corresponding actual power threshold. Based on the actual power determined in step S1 and the second actual power threshold included in the corresponding actual power threshold, the air conditioning blockage state in the high power range is determined as follows: Based on determining that the actual power determined in step S1 is greater than the second actual power threshold, and obtaining multiple actual powers in the previous period of the current time, and simultaneously determining multiple actual powers, and the actual power determined in step S1 increasing sequentially in time order, the high-power segment air conditioning blockage state is identified as high-pressure segment blockage. And based on determining that the actual power determined in step S1 is less than the second actual power threshold and greater than the first actual power threshold, and obtaining multiple actual powers in the previous period of the current time, and simultaneously determining that multiple actual powers and the actual power determined in step S1 fluctuate within a certain range, the air conditioning blockage state in the high power segment is identified as mixed air.

2. The method for identifying blockage status of an air conditioner in cooling mode according to claim 1, characterized in that, The step of identifying the air conditioning blockage status in the low-power segment based on the actual power determined in step S1, its corresponding actual power threshold, actual exhaust temperature, and its corresponding exhaust temperature threshold includes: Based on the actual power determined in step S1, its corresponding actual power threshold including the first actual power threshold and the second power identification rule, it is determined to be a low-power blockage; When low-power blockage is determined, the air conditioning blockage status of the low-power segment is identified based on the actual power determined in step S1, its corresponding actual power thresholds including the third actual power threshold and the fourth actual power threshold, and the actual exhaust temperature and its corresponding exhaust temperature threshold.

3. The method for identifying blockage status of an air conditioner in cooling mode according to claim 2, characterized in that, The step of identifying the air conditioning blockage state in the low-power segment based on the actual power determined in step S1, its corresponding actual power threshold (including the third actual power threshold and the fourth actual power threshold), and the actual exhaust temperature and its corresponding exhaust temperature threshold includes: Based on the actual power determined in step S1 and the third actual power threshold, it is determined to be a first-order low-power blockage; then, based on the actual exhaust temperature and its corresponding exhaust temperature threshold, the air conditioning blockage state of the first-order low-power blockage is identified. And based on the actual power determined in step S1, as well as the third actual power threshold and the fourth actual power threshold, it is determined to be a second-order low-power blockage; then, based on the actual exhaust temperature and its corresponding exhaust temperature threshold, the air conditioning blockage state of the second-order low-power blockage is identified.

4. A method for testing an air conditioning system, characterized in that, Includes the following steps: Obtain the assembly status of the air conditioning system; Obtain the air conditioner blockage state identified by the blockage state identification method for air conditioner in cooling mode as described in any one of claims 1-3; The cause of the blockage is detected based on the acquired assembly status and air conditioner blockage status.

5. The testing method for an air conditioning system according to claim 4, characterized in that, The method of detecting the cause of blockage based on the acquired assembly status and air conditioner blockage status includes: When the obtained assembly status is "assembly operation has been performed" and the obtained air conditioner blockage status is "high power blockage", the blockage cause can be detected as "low pressure valve was not opened" or "gas was mixed in during the assembly stage". When the obtained assembly status indicates that an assembly operation has been performed and the obtained air conditioner blockage status indicates that the first-order system is short of refrigerant or the first-order low-pressure section is blocked, the cause of the blockage is detected as the high-pressure valve being forgotten to be opened. When the obtained assembly status indicates that an assembly operation has been performed and the obtained air conditioning blockage status indicates that the second-order system is short of refrigerant or that the second-order low-pressure section is blocked, the cause of the blockage is detected as refrigerant leakage caused during the assembly stage. When the obtained assembly status is "no assembly operation" and the obtained air conditioner blockage status is "high power blockage", the blockage cause can be detected as motor stall or high-voltage section blockage. When the obtained assembly status is "no assembly operation" and the obtained air conditioner blockage status is "high power blockage", the blockage cause can be detected as motor stall, high-pressure section blockage, aging of the air conditioning system or improper use leading to decomposition of lubricating oil and refrigerant. When the obtained assembly status is no assembly operation and the obtained air conditioner blockage status is first-order system refrigerant shortage or first-order low-pressure section blockage, the blockage cause is detected as blockage of the throttling device. When the obtained assembly status is "no assembly operation performed" and the obtained air conditioning blockage status is "second-stage system refrigerant shortage" or "second-stage low-pressure section blockage", the cause of the blockage is detected to be a leak in the air conditioning system.

6. An air conditioner, characterized in that, It includes a blockage status identification module or a blockage cause determination module. The blockage status identification module implements the blockage status identification method for an air conditioner in cooling mode as described in any one of claims 1-3. The blockage cause determination module implements the detection method for an air conditioning system as described in claim 4 or 5.

7. An electronic device, characterized in that: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for identifying a blockage state of an air conditioner in cooling mode as described in any one of claims 1-3, or the detection method for an air conditioning system as described in claim 4 or 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the blockage state identification method for an air conditioner in cooling mode as described in any one of claims 1-3, or the detection method for an air conditioning system as described in claim 4 or 5.

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