Refrigerant quantity abnormity prompting method and device of air conditioning unit, air conditioner and storage medium

Abstract

The invention relates to a refrigerant quantity abnormity prompting method and device of an air conditioning unit, an air conditioner and a storage medium. The method comprises the steps that the air conditioning unit is controlled to operate in a preset mode according to the maximum capacity; aiming at each first preset parameter in a first preset parameter group corresponding to the preset mode, determining a first parameter value of the first preset parameter corresponding to the air conditioning unit to obtain a first parameter value group; according to the first parameter value set, the current abnormal level of the refrigerant amount in the air conditioning unit is determined, and the abnormal level of the refrigerant amount is used for representing the abnormal degree of the refrigerant amount; and the abnormal level of the refrigerant amount is prompted. Therefore, the abnormal degree of the refrigerant amount in the air conditioning unit can be efficiently and accurately judged, a user is assisted in knowing the abnormal degree of the refrigerant amount of the air conditioning unit, the maintenance cost is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning equipment, and in particular, to a method, device, air conditioner and storage medium for abnormally prompting the refrigerant amount of an air conditioning unit. Background Art

[0002] In modern life and industrial production, air conditioning systems are widely used, and their performance directly affects people's living comfort and the normal development of production activities. Among them, whether the refrigerant amount of the air conditioning system matches the air conditioning system is a key factor affecting its stable operation.

[0003] In practical applications, during the installation or use of an air conditioning system, due to reasons such as refrigerant leakage or inaccurate filling, there are often situations where the actual refrigerant amount in the air conditioning system is too little or too much. Whether the refrigerant amount is too little or too much, when the refrigerant amount does not match the actual air conditioning system, it will not only affect the use comfort of the air conditioning system, but also affect the reliability of the air conditioning unit, resulting in a reduced lifespan or damage of the air conditioning unit. Therefore, it is crucial to promptly detect whether the refrigerant amount in the air conditioning system is abnormal.

[0004] In the prior art, when detecting the refrigerant amount of an air conditioning system, generally, professional personnel need to use complex detection instruments for detection, which is not only cumbersome to operate but also costly, and cannot meet the needs of ordinary users for timely and convenient detection. Summary of the Invention

[0005] The present application provides a method, device, air conditioning unit and storage medium for abnormally prompting the refrigerant amount of an air conditioning unit, so as to solve the technical problem in the prior art that when detecting the refrigerant amount of an air conditioning system, generally, professional personnel need to use complex detection instruments for detection, which is not only cumbersome to operate but also costly, and cannot meet the needs of ordinary users for timely and convenient detection.

[0006] In a first aspect, the present application provides a method for abnormally prompting the refrigerant amount of an air conditioning unit, and the method includes: Controlling the air conditioning unit to operate in a preset mode with maximum capacity; For each first preset parameter in the first preset parameter group corresponding to the preset mode, determining a first parameter value of the air conditioning unit corresponding to the first preset parameter to obtain a first parameter value group; Determining the current abnormal level of the refrigerant amount in the air conditioning unit according to the first parameter value group, where the abnormal level of the refrigerant amount is used to characterize the abnormal degree of the refrigerant amount; Prompting the abnormal level of the refrigerant amount.

[0007] In a second aspect, the present application provides a device for abnormally prompting the refrigerant amount of an air conditioning unit, and the device includes: A control module, configured to control the air conditioner unit to operate in a preset mode at the maximum capacity; A first determination module, configured to determine, for each first preset parameter in the first preset parameter group corresponding to the preset mode, a first parameter value of the air conditioner unit corresponding to the first preset parameter, so as to obtain a first parameter value group; A second determination module, configured to determine, according to the first parameter value group, an abnormal level of the current refrigerant amount in the air conditioner unit, where the abnormal level of the refrigerant amount is used to characterize the abnormal degree of the refrigerant amount; A prompt module, configured to prompt the abnormal level of the refrigerant amount.

[0008] In a third aspect, the present application provides an air conditioner, including: a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus; the memory is used to store a computer program; the processor is configured to, when executing the computer program, implement the refrigerant amount abnormal prompt method of the air conditioner unit described in any item of the first aspect.

[0009] In a fourth aspect, the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the refrigerant amount abnormal prompt method of the air conditioner unit described in any item of the first aspect.

[0010] The technical solution provided by the embodiments of the present application can comprehensively stimulate the real state of the air conditioner unit under high load by controlling the air conditioner unit to operate in a preset mode at the maximum capacity, avoid the abnormal refrigerant amount being masked during low-load operation, ensure that the refrigerant amount detection can cover various working conditions, and on this basis, determine whether the refrigerant amount is abnormal by aggregating multiple preset parameters, which can improve the accuracy of the refrigerant amount detection. Then, by judging the abnormal level of the refrigerant amount and performing hierarchical prompts, users can have an intuitive judgment on the abnormal refrigerant amount of the air conditioner, so as to reasonably arrange the maintenance time, reduce unnecessary maintenance costs, optimize the allocation of maintenance resources, realize the efficient and accurate judgment of the abnormal degree of the refrigerant amount in the air conditioner unit, assist users in understanding the abnormal degree of the refrigerant amount of the air conditioner unit, reduce maintenance costs, and improve the user experience. Description of the Drawings

[0011] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present invention and used together with the description to explain the principles of the present invention.

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0014] Figure 1 It is a flowchart of an embodiment of a method for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 2 It is a flowchart of an embodiment of another method for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 3 It is a flowchart of an embodiment of yet another method for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 4 It is a flowchart of an embodiment of still another method for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 5 It is a flowchart of an embodiment of a primary judgment method for refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 6 It is a flowchart of an embodiment of an accurate judgment method for refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 7 It is a flowchart of an embodiment of yet another method for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 8 It is a flowchart of an embodiment of a control method for abnormal refrigerant amount adjustment strategy provided by an embodiment of the present application; Figure 9 It is a block diagram of an embodiment of a device for prompting abnormal refrigerant amount of an air conditioner unit provided by an embodiment of the present application; Figure 10 It is a structural schematic diagram of an air conditioner provided by an embodiment of the present application. Detailed implementation manners

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0016] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0017] In order to solve the technical problem that in the prior art, when detecting the refrigerant amount of an air-conditioning system, generally professional personnel need to use complex detection instruments for detection, which is not only cumbersome in operation but also high in cost, and cannot meet the needs of ordinary users for timely and convenient detection, the present application provides a method for prompting abnormal refrigerant amount of an air-conditioning unit. By controlling the air-conditioning unit to operate in a preset mode with maximum capacity, the true state of the air-conditioning unit under high load can be fully stimulated, avoiding the masking of abnormal refrigerant amount during low-load operation, ensuring that the refrigerant amount detection can cover various working conditions, and on this basis, by integrating multiple preset parameters to judge whether the refrigerant amount is abnormal, the accuracy of refrigerant amount detection can be improved. Then, by judging the abnormal level of the refrigerant amount and giving hierarchical prompts, users can have an intuitive judgment on the abnormal refrigerant amount of the air conditioner, so as to reasonably arrange the maintenance time, reduce unnecessary maintenance costs, optimize the allocation of maintenance resources, realize the efficient and accurate judgment of the abnormal degree of the refrigerant amount in the air-conditioning unit, assist users to understand the abnormal degree of the refrigerant amount in the air-conditioning unit, reduce maintenance costs, and improve the user experience.

[0018] The following further explains the method for prompting abnormal refrigerant amount of the air-conditioning unit provided by the present application with specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation to the embodiments of the present application.

[0019] See Figure 1 , which is a flowchart of an embodiment of a method for prompting abnormal refrigerant amount of an air-conditioning unit provided by an embodiment of the present application. As Figure 1 shown, the process may include the following steps: Step 101, control the air-conditioning unit to operate in a preset mode with maximum capacity.

[0020] The above-mentioned air-conditioning unit is a complete set of equipment responsible for providing air treatment and adjusting the indoor environment (such as temperature, humidity, cleanliness, etc.), and is widely used in scenarios such as residential buildings, commercial buildings, industrial factories, and data centers. The above-mentioned air-conditioning unit may include at least one indoor unit and at least one outdoor unit, and the embodiments of the present application do not limit this.

[0021] The above-mentioned maximum capacity refers to the maximum cooling capacity or heating capacity that an air-conditioning unit can achieve by adjusting parameters such as compressor frequency, fan speed, and refrigerant flow rate under extreme operating conditions allowed by the design. At this time, the air-conditioning unit operates at full load, and each component (such as the compressor and fan) works in the peak region of the performance curve.

[0022] The above-mentioned preset mode refers to the mode in which the air-conditioning unit operates. It can be a cooling mode, a heating mode, or other modes, and the embodiments of the present application do not limit this.

[0023] In the embodiments of the present application, in order to fully stimulate the real state of the air-conditioning unit under high load and avoid the abnormal refrigerant amount being masked during low-load operation, so as to ensure that the detection covers various operating conditions, the execution subject of the embodiments of the present application can control the air-conditioning unit to operate in the preset mode according to the maximum capacity.

[0024] As an optional implementation manner, the above-mentioned preset mode can be a cooling mode. Based on this, when the above-mentioned preset mode is a cooling module, all indoor units can be controlled to operate at the lowest temperature (such as 16 °C) in the cooling mode, so as to achieve the maximum capacity operation of the air-conditioning unit in the cooling mode.

[0025] As another optional implementation manner, the above-mentioned preset mode can be a heating mode. Based on this, when the above-mentioned preset mode is a heating module, all indoor units can be controlled to operate at the highest temperature (such as 30 °C) in the heating mode, so as to achieve the maximum capacity operation of the air-conditioning unit in the heating mode.

[0026] As an optional implementation manner, in order to prevent discomfort to the users of the air-conditioning unit when controlling the air-conditioning unit to operate at the maximum capacity, the execution subject of the embodiments of the present application can control the air-conditioning unit to operate in the preset mode according to the maximum capacity within a preset time period. The above-mentioned preset time period can be a time period preset by the user or the default time period of the control unit, such as from 3:00 am to 4:00 am, and the embodiments of the present application do not limit this.

[0027] As an exemplary implementation manner, when the execution subject of the embodiments of the present application controls the air-conditioning unit to operate in the preset mode according to the maximum capacity, it can determine whether the current time is within the preset time period.

[0028] Optionally, when it is determined that the current time is within the above-mentioned preset time period, the air-conditioning unit can be controlled to operate in the above-mentioned preset mode according to the maximum capacity.

[0029] Optionally, when it is determined that the current time is not within the preset time period, the operating state of the air-conditioning unit can be not controlled, and after the current time reaches the above-mentioned preset time period, the air-conditioning unit can be controlled to operate in the preset mode according to the maximum capacity.

[0030] As another alternative implementation, the air conditioner unit may have a refrigerant amount abnormality detection function. Based on this, when it is detected that the refrigerant amount abnormality detection function is triggered, the execution entity of the embodiment of the present application may control the air conditioner unit to operate in a preset mode with maximum capacity.

[0031] As an exemplary implementation, a function button corresponding to the refrigerant amount abnormality detection function may be provided in the indoor unit or the controller of the air conditioner unit. The user can trigger the function button to implement the above-mentioned refrigerant amount abnormality detection function. Based on this, when the execution entity of the embodiment of the present application detects that the function button is triggered, it determines that the refrigerant amount abnormality detection function is triggered.

[0032] As another exemplary implementation, the execution entity of the embodiment of the present application may pre-store a voice control instruction for the refrigerant amount abnormality detection function. The user can control the air conditioner unit to implement the refrigerant amount abnormality detection function by outputting a voice instruction. Based on this, when the execution entity of the embodiment of the present application receives the voice control instruction corresponding to the refrigerant amount abnormality detection function, it determines that the refrigerant amount abnormality detection function is triggered.

[0033] Step 102: For the first preset parameter in the first preset parameter group corresponding to the above-mentioned preset mode, determine the first parameter value of the air conditioner unit corresponding to the first preset parameter, and obtain a first parameter value group.

[0034] The above-mentioned first preset parameter group includes a plurality of first preset parameters preset for determining whether there is an abnormality in the refrigerant amount in the air conditioner unit. Among them, different preset modes may correspond to different first preset parameter groups.

[0035] The above-mentioned first preset parameter refers to a parameter involved in the operation process of the air conditioner unit. Whether there is an abnormality in the refrigerant amount in the air conditioner unit can be determined through a plurality of first preset parameters.

[0036] In the embodiment of the present application, in order to facilitate determining whether there is an abnormality in the current refrigerant amount of the air conditioner unit, the execution entity of the embodiment of the present application may pre-store a preset parameter group corresponding to each preset mode (hereinafter referred to as the "first preset parameter group" for easy distinction). Based on this, when controlling the air conditioner unit to operate in a preset mode with maximum capacity, the first preset parameter group corresponding to the preset mode can be obtained.

[0037] After that, for each first preset parameter in the first preset parameter group, the first parameter value of the air conditioner unit corresponding to the first preset parameter can be determined. Based on this operation, the first parameter value corresponding to each first preset parameter can be finally obtained, and a first parameter value group is obtained.

[0038] As an alternative implementation, when the preset mode is the cooling mode, the first preset parameter group may include the average opening degree of the electronic expansion valves of all the indoor units and the exhaust superheat degree of the air-conditioning unit (hereinafter referred to as the "first exhaust superheat degree" for easy distinction).

[0039] Based on this, as an exemplary implementation, when obtaining the average opening degree of the electronic expansion valves of all the indoor units, the execution subject of the embodiment of the present application may, during the process of the air-conditioning unit operating in the preset mode with the maximum capacity, obtain the opening degree of the electronic expansion valve in each indoor unit of the air-conditioning unit, and calculate the average value of the opening degrees of the electronic expansion valves of all the indoor units to obtain the average opening degree of the electronic expansion valves of all the indoor units.

[0040] As an exemplary implementation, when obtaining the first exhaust superheat degree, the exhaust temperature at the compressor exhaust port of the air-conditioning unit and the saturation temperature corresponding to the saturated pressure of the refrigerant amount on the high-pressure side (hereinafter referred to as the "module high pressure" for easy description) may be obtained first. Then, the first exhaust superheat degree may be obtained by subtracting the module high pressure from the exhaust temperature.

[0041] As another alternative implementation, when the preset mode is the heating mode, the first preset parameter group may include the module high pressure of the air-conditioning unit (hereinafter referred to as the "first module high pressure" for easy distinction), the module low pressure of the air-conditioning unit (hereinafter referred to as the "first module low pressure" for easy distinction), and the exhaust superheat degree of the air-conditioning unit (hereinafter referred to as the "second exhaust superheat degree"), etc. Among them, the first module high pressure may be used to represent the saturation temperature corresponding to the saturated pressure of the refrigerant on the high-pressure side of the air-conditioning unit, and the first module low pressure may be used to represent the saturation temperature corresponding to the saturated pressure of the refrigerant on the low-pressure side of the air-conditioning unit.

[0042] Based on this, as an exemplary implementation, the execution subject of the embodiment of the present application may directly obtain the saturation temperature corresponding to the saturated pressure of the refrigerant on the high-pressure side of the air-conditioning unit (i.e., the first module high pressure, also known as the "condensing temperature") and the saturation temperature corresponding to the saturated pressure of the refrigerant on the low-pressure side of the air-conditioning unit (i.e., the first module low pressure, also known as the "evaporation temperature") through a temperature sensor.

[0043] As an exemplary implementation, when obtaining the second exhaust superheat degree, the exhaust temperature at the compressor exhaust port of the air-conditioning unit may be obtained first. Then, the second exhaust superheat degree may be obtained by subtracting the first module high pressure from the exhaust temperature.

[0044] Step 103: Determine the current refrigerant amount abnormal level in the air-conditioning unit according to the first parameter value group, where the refrigerant amount abnormal level is used to represent the abnormal degree of the refrigerant amount.

[0045] Step 104: Prompt the above refrigerant quantity abnormal level.

[0046] The following is a unified description of Step 103 and Step 104: The above refrigerant quantity abnormal level can be used to characterize the abnormal degree when the refrigerant quantity is abnormal. For example, when the refrigerant quantity of the air conditioner unit is insufficient, the refrigerant quantity abnormal level can include: slightly insufficient refrigerant (the insufficient refrigerant quantity is less), moderately insufficient refrigerant (the insufficient refrigerant quantity is moderate), and severely insufficient refrigerant (the insufficient refrigerant quantity is very large); and for another example, when the refrigerant quantity of the air conditioner unit is excessive, the refrigerant quantity abnormal level can include: slightly excessive refrigerant (the excessive refrigerant quantity is less), moderately excessive refrigerant (the excessive refrigerant quantity is moderate), and severely excessive refrigerant (the excessive refrigerant quantity is very large), etc.

[0047] In the embodiment of the present application, after obtaining the first parameter value group corresponding to the preset mode of the air conditioner unit, the execution subject of the embodiment of the present application can determine the current refrigerant quantity abnormal level in the air conditioner unit according to the above first parameter value group, and prompt the refrigerant quantity abnormal level.

[0048] As for how to specifically determine the current refrigerant quantity abnormal level in the air conditioner unit according to the first parameter value group, it can be described respectively in the following Figure 2 and Figure 3 shown processes, which will not be elaborated here first.

[0049] As an optional implementation manner, each refrigerant quantity abnormal level can correspond to at least one prompt identifier. Based on this, after determining the current refrigerant quantity abnormal level of the air conditioner unit, the execution subject of the embodiment of the present application can determine the prompt identifier corresponding to the refrigerant quantity abnormal level, and prompt the above refrigerant quantity abnormal level by outputting the prompt identifier. Among them, the above prompt identifier can be a preset fault code (for example, Q1 represents slightly insufficient refrigerant, Q2 represents moderately insufficient refrigerant, Q3 represents severely insufficient refrigerant), or a preset color identifier (for example, green represents slightly insufficient refrigerant, yellow represents moderately insufficient refrigerant, red represents severely insufficient refrigerant).

[0050] As an exemplary implementation manner, the execution subject of the embodiment of the present application can pre-store the correspondence between the refrigerant quantity abnormal level and the prompt identifier. Based on this, the execution subject of the embodiment of the present application can determine the prompt identifier corresponding to the refrigerant quantity abnormal level according to the determined refrigerant quantity abnormal level and the correspondence.

[0051] As an exemplary implementation manner, the execution subject of the embodiment of the present application can output the prompt identifier through a preset manner such as the display board, the indoor unit lamp board, or the wire controller of the air conditioner unit.

[0052] The technical solution provided by the embodiments of the present application controls the air conditioner unit to operate in a preset mode with maximum capacity, determines the first parameter value of the air conditioner unit corresponding to the first preset parameter in the first preset parameter group corresponding to the preset mode, obtains the first parameter value group, determines the current refrigerant amount abnormality level in the air conditioner unit according to the first parameter value group, where the refrigerant amount abnormality level is used to characterize the abnormality degree of the refrigerant amount, and prompts the refrigerant amount abnormality level. This technical solution can fully stimulate the true state of the air conditioner unit under high load by controlling the air conditioner unit to operate in a preset mode with maximum capacity, avoid the concealment of refrigerant amount abnormality during low-load operation, ensure that the refrigerant amount detection can cover various working conditions, and on this basis, judge whether the refrigerant amount is abnormal by aggregating multiple preset parameters to improve the accuracy of refrigerant amount detection. Then, by judging the refrigerant amount abnormality level and giving a graded prompt, the user can have an intuitive judgment on the refrigerant amount abnormality of the air conditioner, so as to reasonably arrange the maintenance time, reduce unnecessary maintenance costs, optimize the allocation of maintenance resources, realize the efficient and accurate judgment of the abnormality degree of the refrigerant amount in the air conditioner unit, assist the user to understand the abnormality degree of the refrigerant amount in the air conditioner unit, reduce the maintenance cost, and improve the user experience.

[0053] See Figure 2 , which is a flowchart of an embodiment of another method for prompting refrigerant amount abnormality of an air conditioner unit provided by the embodiments of the present application. Figure 2 The process shown Figure 1 On the basis of the process shown, it describes how to determine the current refrigerant amount abnormality level in the air conditioner unit according to the first parameter value group when the preset mode is the cooling mode and the first parameter value group includes the average opening degree of the electronic expansion valves of all indoor units and the first exhaust superheat degree of the air conditioner unit. As Figure 2 shown, the process may include the following steps: Step 201: Determine the target opening degree range to which the average opening degree belongs from a plurality of preset opening degree ranges.

[0054] Step 202: Obtain the superheat degree threshold corresponding to the target opening degree range, and compare the first exhaust superheat degree with the superheat degree threshold to obtain the first comparison result.

[0055] Step 203: Determine the current refrigerant amount abnormality level in the air conditioner unit according to the target opening degree range and the first comparison result.

[0056] The following is a unified description of steps 201 to 203: The above opening degree range refers to the opening degree range preset for judging the refrigerant amount abnormality level. Among them, when the air conditioner unit operates in the cooling mode, the opening degree of the electronic expansion valve in the indoor unit is negatively correlated with the refrigerant cooling capacity in the air conditioner unit. Therefore, the opening degree ranges corresponding to different refrigerant amount abnormality levels can be pre-calibrated.

[0057] The above superheat threshold refers to the superheat threshold corresponding to different opening ranges. This superheat threshold can further measure the accuracy of the refrigerant amount abnormality level. That is, when determining whether the refrigerant amount abnormality level of the air conditioner unit is the refrigerant amount abnormality level corresponding to the target opening range, it is also necessary to further determine whether the first discharge superheat meets the above superheat threshold.

[0058] In the embodiments of the present application, the execution entity of the embodiments of the present application can pre-store multiple different opening ranges of the electronic expansion valve, and the superheat threshold corresponding to each opening range. Among them, different opening ranges can correspond to different refrigerant amount abnormality levels. The above opening range can be determined according to the maximum opening value of the electronic expansion valve. For example, it can be a preset percentage range of the maximum opening value, such as 60% to 80% of the maximum opening value. The above maximum opening value can be 500 PLS (Pulses, the number of electrical signal pulses), 2000 PLS, or 3000 PLS. The embodiments of the present application do not limit this.

[0059] Based on this, when the air conditioner unit operates in the cooling mode, when determining the current refrigerant amount abnormality level of the air conditioner unit according to the first parameter value group, the target opening range to which the average opening in the first parameter value group belongs can be determined from the above preset multiple opening ranges first.

[0060] After that, in order to further determine whether the current refrigerant amount abnormality level of the air conditioner unit belongs to the refrigerant amount abnormality level corresponding to the target opening range, the execution entity of the embodiments of the present application can obtain the exhaust superheat threshold corresponding to the target opening range, and compare the first discharge superheat in the first parameter value group with the superheat threshold to obtain a first comparison result.

[0061] Finally, the current refrigerant amount abnormality level in the air conditioner unit can be determined according to the above target opening range and the above first comparison result.

[0062] As an optional implementation manner, the refrigerant amount abnormality level of the air conditioner unit can include two types of abnormalities: lack of refrigerant and excessive refrigerant. Based on this, the above opening range can include two types: the first type of opening range and the second type of opening range. Among them, the above first type of opening range can correspond to the refrigerant amount abnormality level being the lack of refrigerant abnormality level, and the second opening range can correspond to the refrigerant amount abnormality level being the excessive refrigerant abnormality level.

[0063] Based on this, when determining the current refrigerant amount abnormality level in the air conditioner unit according to the target opening range and the first comparison result, optionally, when it is determined that the target opening range belongs to the first type of opening range and the first comparison result indicates that the first exhaust superheat degree is greater than or equal to the corresponding superheat degree threshold, it can be determined that the current refrigerant amount abnormality level in the air conditioner unit is the refrigerant shortage abnormality level. Among them, the degree of refrigerant shortage corresponding to the above refrigerant shortage abnormality level is positively correlated with the opening value within the first type of opening range, and the opening value within the first type of opening range is positively correlated with the superheat degree threshold.

[0064] As an implementation manner, the above first type of opening range may include a first opening range, a second opening range, and a third opening range.

[0065] Based on this, when it is determined that the target opening range is the first opening range, if the first comparison result indicates that the first exhaust superheat degree is greater than or equal to the first superheat degree threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is severe refrigerant shortage.

[0066] When it is determined that the target opening range is the second opening range, if the first comparison result indicates that the first exhaust superheat degree is greater than or equal to the second superheat degree threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is moderate refrigerant shortage; among them, the opening value within the second opening range is less than the opening value within the first opening range, and the second superheat degree threshold is less than the first superheat degree threshold.

[0067] When it is determined that the target opening range is the third opening range, if the first comparison result indicates that the first exhaust superheat degree is greater than or equal to the third exhaust superheat degree threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is mild refrigerant shortage; among them, the opening value within the third opening range is less than the opening value within the second opening range, and the third exhaust superheat degree threshold is less than the second superheat degree threshold.

[0068] Optionally, when it is determined that the target opening range belongs to the second type of opening range and the first comparison result indicates that the first exhaust superheat degree is less than the corresponding exhaust superheat degree threshold, it can be determined that the current refrigerant amount abnormality level in the air conditioner unit is the over-refrigerant abnormality level. Among them, the opening value within the first type of opening range is greater than the opening value within the second type of opening range, the degree of over-refrigerant corresponding to the above over-refrigerant abnormality level is negatively correlated with the opening value within the second type of opening range, and the opening value within the second type of opening range is positively correlated with the multi-superheat degree threshold.

[0069] As an implementation manner, the above second type of opening range may include a fourth opening range, a fifth opening range, and a sixth opening range.

[0070] Based on this, when it is determined that the target opening range is the fourth opening range, if the first comparison result indicates that the first exhaust superheat degree is less than the fourth superheat threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is mild over-refrigerant; wherein, the opening value within the fourth opening range is less than the opening value within the first opening range, and the fourth superheat threshold is greater than the first superheat threshold.

[0071] When it is determined that the target opening range is the fifth opening range, if the first comparison result indicates that the first exhaust superheat degree is less than the fifth superheat threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is moderate over-refrigerant; wherein, the opening value within the fifth opening range is less than the opening value within the fourth opening range, and the fifth superheat threshold is less than the fourth superheat threshold.

[0072] When it is determined that the target opening range is the sixth opening range, if the first comparison result indicates that the first exhaust superheat degree is less than the sixth superheat threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is severe over-refrigerant; wherein, the opening value within the sixth opening range is less than the opening value within the fifth opening range, and the sixth superheat threshold is less than the fifth superheat threshold.

[0073] In addition, the preset opening range described above may further include a third type of opening range, which can represent that there is no abnormality in the refrigerant amount in the air conditioner unit. Among them, the opening value within the third type of opening range may be greater than the opening value within the second type of opening range and less than the opening value within the first type of opening range, and the third type of opening range may correspond to a superheat threshold range. Based on this, when the target opening range belongs to the third type of opening range and the first exhaust superheat degree is within the superheat threshold range, it can be determined that there is no abnormality in the current refrigerant amount in the air conditioner unit.

[0074] For ease of understanding, the above-mentioned first type of opening range, second type of opening range, and third type of opening range are illustrated by examples as follows: Assume that the average opening in the first parameter value group is P1, the maximum opening of the electronic expansion valve is Pmax, and the first exhaust superheat degree is Tpg1. Then, the determination method for the refrigerant amount abnormality level of the air conditioner unit can be as follows: When P1≥Pmax*80% and Tpg1≥35°C, the refrigerant amount abnormality is severe lack of refrigerant; When Pmax*60%≤P1<Pmax*80% and Tpg1≥30°C, the refrigerant amount abnormality is moderate lack of refrigerant; When Pmax*45%≤P1<Pmax*60% and Tpg1≥25°C, the refrigerant amount abnormality is mild lack of refrigerant; When Pmax*20%≤P1<Pmax*45% and 15°C≤Tpg1<50°C, the refrigerant amount is normal; When Pmax * 15% ≤ P1 < Pmax * 20% and Tpg1 < 40°C, the refrigerant charge abnormality is slightly undercharged refrigerant; When Pmax * 10% ≤ P1 < Pmax * 15% and Tpg1 < 30°C, the refrigerant charge abnormality is moderately undercharged refrigerant; When P1 < Pmax * 10% and Tpg1 < 10°C, the refrigerant charge abnormality is severely undercharged refrigerant.

[0075] The technical solution provided by the embodiment of the present application, when the preset mode is the cooling mode, determines the target opening range to which the above average opening belongs from a plurality of preset opening ranges, obtains the superheat threshold corresponding to the target opening range, compares the first discharge superheat with the above superheat threshold to obtain a first comparison result, and determines the current refrigerant charge abnormality level in the air conditioner unit according to the above target opening range and the first comparison result. This technical solution, by pre-setting the corresponding relationship between the opening range, the discharge superheat threshold, and the refrigerant charge abnormality level corresponding to the cooling mode, can quickly and accurately determine the refrigerant charge abnormality level of the air conditioner unit by comparing the obtained average opening and the first discharge superheat with this corresponding relationship when determining the refrigerant charge abnormality level of the air conditioner unit in the cooling mode, realizing the quick and accurate determination of the refrigerant charge abnormality level of the air conditioner unit in the cooling mode.

[0076] See Figure 3 , which is a flowchart of an embodiment of another method for prompting refrigerant charge abnormality of an air conditioner unit provided by the embodiment of the present application. Figure 3 The process shown Figure 1 On the basis of the process shown, it describes how to specifically determine the current refrigerant charge abnormality level in the air conditioner unit according to the first parameter value group when the preset mode is the heating mode and the first parameter value group includes the first module high pressure of all air conditioner units and the first module low pressure of the air conditioner unit. As Figure 3 shown, the process may include the following steps: Step 301, obtain the current outdoor ambient temperature value, and determine a plurality of low pressure ranges according to the outdoor ambient temperature value.

[0077] Step 302, determine the target low pressure range to which the first module low pressure belongs from the plurality of low pressure ranges.

[0078] Step 303, obtain the module high pressure threshold corresponding to the target low pressure range, and determine whether the first module high pressure is less than or equal to the above module high pressure threshold; if so, execute step 304; if not, execute step 305.

[0079] Step 304: Determine that the current refrigerant amount abnormality level in the air conditioner unit is the refrigerant shortage abnormality level corresponding to the target low-pressure range; wherein, the degree of refrigerant shortage corresponding to the refrigerant shortage abnormality level of the air conditioner unit is negatively correlated with the first module low pressure and the first module high pressure respectively.

[0080] The following is a unified description of Steps 301 to 304: The above outdoor environmental temperature value refers to the temperature value corresponding to the environment where the outdoor unit of the air conditioner unit is located.

[0081] The above low-pressure range refers to the range to which the module low pressure corresponding to each refrigerant amount abnormality level in different preset refrigerant amount abnormality levels belongs.

[0082] The above module high-pressure threshold refers to the module high-pressure threshold corresponding to different low-pressure ranges. This module high-pressure threshold can further measure the accuracy of the refrigerant amount abnormality level. That is, when determining whether the refrigerant amount abnormality level of the air conditioner unit is the refrigerant amount abnormality level corresponding to the target low-pressure range, it is also necessary to further determine whether the module high pressure meets the above module high-pressure threshold.

[0083] In the embodiments of the present application, the execution subject of the embodiments of the present application can pre-store the corresponding relationship between the outdoor environmental temperature value, the low-pressure range, and the module high-pressure threshold. Based on this, in the case of the heating mode of the air conditioner unit, if it is determined that the current refrigerant amount abnormality level of the air conditioner unit, the current outdoor environmental temperature value can be obtained first, and according to this outdoor environmental temperature value, multiple low-pressure ranges can be determined.

[0084] As an optional implementation manner, the outdoor environmental temperature value can be obtained by an environmental temperature sensor installed on the outdoor unit.

[0085] As an optional implementation manner, the above different low-pressure ranges can be the outdoor environmental temperature value minus different temperature thresholds. Based on this, after obtaining the outdoor environmental temperature value, the above outdoor environmental temperature value can be subtracted by the temperature threshold corresponding to each low-pressure range to obtain multiple low-pressure ranges.

[0086] After that, the target low-pressure range to which the above first module low pressure belongs can be determined from the multiple determined low-pressure ranges, and the module high-pressure threshold corresponding to the target low-pressure range can be obtained.

[0087] Then, it can be determined whether the first module high pressure in the first parameter value group is less than or equal to the above module high-pressure threshold.

[0088] Optionally, when it is determined that the high pressure of the first module is less than or equal to the above-mentioned module high pressure threshold, it indicates that the air conditioner unit meets the refrigerant amount abnormality level corresponding to the target low pressure range at this time. Therefore, it can be determined that the current refrigerant amount abnormality level in the air conditioner unit is the refrigerant shortage abnormality level corresponding to the target low pressure range. Among them, the refrigerant shortage programs corresponding to the refrigerant shortage abnormality levels of the above-mentioned air conditioner unit are negatively correlated with the low pressure of the first module and the high pressure of the first module respectively.

[0089] As an exemplary embodiment, the above-mentioned low pressure range may include a first low pressure range, a second low pressure range, and a third low pressure range. Among them, the first low pressure range may correspond to a first module high pressure threshold, the second low pressure range may correspond to a second module high pressure threshold, and the third low pressure range may correspond to a third module high pressure threshold, and different low pressure ranges may correspond to different refrigerant shortage abnormality levels.

[0090] Based on this, when it is determined that the target low pressure range is the first low pressure range, if the high pressure of the first module is less than or equal to the corresponding first module high pressure threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is severe refrigerant shortage; When it is determined that the target low pressure range is the second low pressure range, if the high pressure of the first module is less than or equal to the corresponding second module high pressure threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is moderate refrigerant shortage; among them, the temperature value in the second low pressure range is greater than the temperature value in the first low pressure range, and the second module high pressure threshold is greater than the first module high pressure threshold; When it is determined that the target low pressure range is the third low pressure range, if the high pressure of the first module is less than or equal to the corresponding third module high pressure threshold, it is determined that the current refrigerant amount abnormality level of the air conditioner unit is mild refrigerant shortage; among them, the temperature value in the third low pressure range is greater than the temperature value in the second low pressure range, and the third module high pressure threshold is greater than the second module high pressure threshold.

[0091] Optionally, if it is determined that the high pressure of the first module is greater than the above-mentioned module high pressure threshold, it indicates that the air conditioner unit does not meet the refrigerant shortage abnormality level at this time. Therefore, step 305 can be continued to determine whether the air conditioner unit is in an over-refrigerant abnormality level.

[0092] In addition, for the execution conditions of step 305, the embodiments of the present application do not limit this, that is, step 305 can be executed when the high pressure of the first module is greater than the module high pressure threshold, or step 305 can be executed before executing step 301, or step 305 can be executed when it is determined that the low pressure of the first module does not belong to any of the low pressure ranges.

[0093] Step 305: When the first parameter value group further includes the second exhaust superheat degree of the air conditioner unit, determine the target superheat degree range to which the second exhaust superheat degree belongs from a plurality of preset superheat degree ranges.

[0094] Step 306: Obtain the new module high-pressure threshold corresponding to the target superheat range, and determine whether the first module high pressure is greater than or equal to the above new module high-pressure threshold. If so, execute Step 307; if not, end the process.

[0095] Step 307: Determine that the current refrigerant amount abnormal level of the air conditioner unit is the over-refrigerant abnormal level corresponding to the target superheat range; wherein, the over-refrigerant degree corresponding to the over-refrigerant abnormal level of the air conditioner unit is negatively correlated with the second exhaust superheat and positively correlated with the new module high-pressure threshold.

[0096] The following gives a unified description of Steps 305 to 307: The above-mentioned second exhaust superheat refers to the current exhaust superheat of the air conditioner unit, which can be obtained by subtracting the first module high pressure from the exhaust temperature of the air conditioner unit.

[0097] The above-mentioned superheat range is the range to which the over-refrigerant degrees corresponding to different over-refrigerant abnormal levels belong, which is preset.

[0098] The above-mentioned new module high-pressure threshold refers to the module high-pressure threshold corresponding to different superheat ranges. This module high-pressure threshold can further measure the accuracy of the refrigerant amount abnormal level. That is, when determining whether the refrigerant amount abnormal level of the air conditioner unit is the refrigerant amount abnormal level corresponding to the target superheat range, it is also necessary to further determine whether the first module high pressure meets the above new module high-pressure threshold.

[0099] In the embodiment of the present application, the execution subject of the present application can pre-store multiple different superheat ranges of the air conditioner unit and the new module high-pressure threshold corresponding to each superheat range, wherein different superheat ranges can correspond to different over-refrigerant abnormal levels.

[0100] Based on this, when the air conditioner unit operates in the heating mode and the first parameter value includes the second exhaust superheat of the air conditioner unit, when determining the current refrigerant amount abnormal level of the air conditioner unit according to the first parameter value group, the target superheat range to which the second exhaust superheat belongs can be first determined from the above preset multiple superheat ranges.

[0101] After that, in order to further determine whether the current refrigerant amount abnormal level of the air conditioner unit belongs to the refrigerant amount abnormal level corresponding to the target superheat range, the execution subject of the embodiment of the present application can obtain the new module high-pressure threshold corresponding to the target superheat range and determine whether the first module high pressure is greater than or equal to the above new module high-pressure threshold.

[0102] Optionally, when it is determined that the high pressure of the first module is greater than or equal to the high pressure threshold of the new module, it indicates that the abnormal level of the refrigerant amount in the air conditioner unit at this time meets the abnormal refrigerant level corresponding to the target superheat range. Therefore, it can be determined that the current abnormal level of the refrigerant amount in the air conditioner unit is the abnormal refrigerant level corresponding to the target superheat range. Among them, the degree of abnormal refrigerant corresponding to the abnormal refrigerant level of the air conditioner unit can be negatively correlated with the second exhaust superheat and positively correlated with the high pressure threshold of the new module.

[0103] As an optional implementation manner, the above-mentioned multiple superheat ranges may include a first superheat range, a second superheat range, and a third superheat range. Among them, the first superheat range may correspond to a first high pressure threshold of the new module, the second superheat range may correspond to a second high pressure threshold of the new module, and the third superheat range may correspond to a third high pressure threshold of the new module.

[0104] Based on this, when the target superheat range is the first superheat range, if the high pressure of the first module is greater than or equal to the first high pressure threshold of the new module, it is determined that the current abnormal level of the refrigerant amount in the air conditioner unit is mild over-refrigerant.

[0105] When the target superheat range is the second superheat range, if the high pressure of the first module is greater than or equal to the second high pressure threshold of the new module, it is determined that the current abnormal level of the refrigerant amount in the air conditioner unit is moderate over-refrigerant; among them, the temperature value in the second superheat range is less than the temperature value in the first superheat range, and the second high pressure threshold of the new module is greater than the first high pressure threshold of the new module.

[0106] When the target superheat range is the third superheat range, if the third comparison result indicates that the high pressure of the first module is greater than or equal to the third high pressure threshold of the new module, it is determined that the current abnormal level of the refrigerant amount in the air conditioner unit is severe over-refrigerant; among them, the temperature value in the third superheat range is less than the temperature value in the second superheat range, and the third high pressure threshold of the new module is greater than the second high pressure threshold of the new module.

[0107] In addition, the above-mentioned superheat range may further include a fourth superheat range, and this fourth superheat range may indicate that there is no abnormality in the refrigerant amount in the air conditioner unit. Among them, this fourth superheat range may correspond to a range of high pressure thresholds of the new module. Based on this, when the target superheat range belongs to this fourth superheat range and the high pressure of the first module is within this range of high pressure thresholds of the new module, it can be determined that there is no abnormality in the current refrigerant amount in the air conditioner unit. Among them, the temperature value in the fourth superheat range may be greater than or equal to the temperature value in the first superheat range, and the high pressure threshold of the new module within the above-mentioned range of high pressure thresholds of the new module may be greater than or equal to the first high pressure threshold of the new module and less than the third high pressure threshold of the new module.

[0108] For easy understanding Figure 3In the process shown below, when the air conditioner unit operates in heating mode, specifically how to determine the abnormal level of the refrigerant amount in the air conditioner unit will be illustrated by the following examples: Assume that the outdoor ambient temperature value is Tenv, the high pressure of the first module is Ph1, the low pressure of the first module is Pd1, and the superheat degree of the second exhaust is Tpg2. Then, the method for determining the abnormal level of the refrigerant amount in the air conditioner unit can be as follows: When Pd1 ≤ Tenv - 30°C and Ph1 ≤ 42°C, the refrigerant amount is abnormally severely lacking refrigerant; When Tenv - 30°C < Pd1 ≤ Tenv - 20°C and Ph1 ≤ 45°C, the refrigerant amount is abnormally moderately lacking refrigerant; When Tenv - 20°C < Pd1 ≤ Tenv - 15°C, the refrigerant amount is abnormally slightly lacking refrigerant; When 15°C ≤ Tpg2 < 50°C and 45°C ≤ Ph1 < 53°C, the refrigerant amount is normal; When 15°C < Tpg2 ≤ 20°C and Ph1 ≥ 45°C, the refrigerant amount is abnormally slightly over-refrigerated; When 10°C < Tpg2 ≤ 15°C and Ph1 ≥ 50°C, the refrigerant amount is abnormally moderately over-refrigerated; When Tpg2 ≤ 10°C and Ph1 ≥ 52°C, the refrigerant amount is abnormally severely over-refrigerated.

[0109] The technical solution provided in the embodiment of the present application, by presetting the corresponding relationship between the low-pressure range, the module high-pressure threshold, and the abnormal level of lacking refrigerant in the refrigeration mode when the preset mode is the heating mode, can quickly and accurately determine the abnormal level of lacking refrigerant in the air conditioner unit by comparing the obtained low pressure of the first module and the high pressure of the first module with this corresponding relationship when determining the abnormal level of lacking refrigerant in the refrigeration mode of the air conditioner unit; and by presetting the corresponding relationship between the superheat degree range, the new module high-pressure threshold, and the abnormal level of over-refrigeration in the heating mode, so when determining the abnormal level of over-refrigeration in the heating mode of the air conditioner unit, by comparing the obtained superheat degree of the second exhaust and the high pressure of the first module with the above corresponding relationship, the abnormal level of over-refrigeration in the air conditioner unit can be quickly and accurately determined, thereby realizing quickly and accurately determining the abnormal level of the refrigerant amount in the air conditioner unit.

[0110] See Figure 4 , which is a flowchart of an embodiment of another method for prompting abnormal refrigerant amount in an air conditioner unit provided by the embodiment of the present application. Figure 4 The process shown below Figures 1 to 3 Based on any process, it describes that before controlling the air conditioner unit to operate in the preset mode with the maximum capacity, it is first preliminarily determined whether there is an abnormality in the refrigerant amount in the air conditioner unit. As Figure 4 shown, this process may include the following steps: Step 401: After detecting that the air conditioner unit operates in a preset mode for a preset duration, for each second preset parameter in the second parameter group corresponding to the preset mode, determine the second parameter value of the air conditioner unit corresponding to the second preset parameter to obtain a second parameter value group.

[0111] Step 402: Determine whether there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group. If so, execute Step 403; if not, end the process.

[0112] The following is a unified description of Step 401 and Step 402: The above-mentioned preset duration refers to the preset operation duration of the air conditioner unit.

[0113] The above-mentioned preset mode refers to the mode in which the air conditioner unit operates, which can be a cooling mode, a heating mode, or other modes. The embodiments of the present application do not limit this.

[0114] The above-mentioned second preset parameter group includes multiple second preset parameters preset for preliminarily determining whether there is an abnormality in the refrigerant amount in the air conditioner unit. Among them, different preset modes may correspond to different second preset parameter groups.

[0115] The above-mentioned second preset parameter refers to a parameter involved in the operation of the air conditioner unit. Whether there is an abnormality in the refrigerant amount in the air conditioner unit can be preliminarily determined through multiple second preset parameters.

[0116] In the embodiments of the present application, in order to facilitate preliminarily determining whether there is an abnormality in the current refrigerant amount of the air conditioner unit during the normal operation of the air conditioner unit in a preset mode, the execution entity of the embodiments of the present application may pre-store a preset parameter group corresponding to each preset mode (hereinafter referred to as the "second preset parameter group" for easy distinction). Based on this, after detecting that the air conditioner unit operates in a preset mode for a preset duration, the second preset parameter group corresponding to the preset mode can be obtained. Among them, the air conditioner unit operating in a preset mode for a preset duration can be that the air conditioner unit operates normally for a preset duration according to the preset mode set by the user, and its operating capacity can be a non-maximum capacity or a maximum capacity. The embodiments of the present application do not limit this.

[0117] After that, for each second preset parameter in the second preset parameter group, determine the second parameter value of the air conditioner unit corresponding to the second preset parameter. Based on this operation, the second parameter value corresponding to each second preset parameter can be finally obtained to obtain a second parameter value group.

[0118] Finally, it can be preliminarily determined whether there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group.

[0119] As an alternative implementation, when the preset mode is the refrigeration mode, the second parameter value group may include: the average opening degree of the electronic expansion valve of the target indoor unit of the air conditioner unit within the first preset duration, the high pressure of the second module of the air conditioner unit within the first preset duration (the high pressure of the second module may be multiple high pressures of the second module within the first preset duration, and when determining that the high pressure of the second module meets the corresponding conditions below, multiple high pressures of the second module may be satisfied simultaneously), and the low pressure of the second module of the air conditioner unit within the first preset duration (the low pressure of the second module may be multiple low pressures of the second module within the first preset duration, and when determining that the low pressure of the second module meets the corresponding conditions below, multiple low pressures of the second module may be satisfied simultaneously). Among them, the target indoor unit is the indoor unit that has not reached the preset temperature value within the first preset duration, and it may be one or more indoor units in the air conditioner unit; the high pressure of the second module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the high-pressure side of the air conditioner unit, that is, the condensation temperature of the air conditioner unit within the first preset duration, and the low pressure of the second module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the low-pressure side of the air conditioner unit, that is, the evaporation temperature of the air conditioner unit within the first preset duration; the first preset duration may be a relatively short duration, such as 5 minutes, 4 minutes, or 6 minutes, etc.

[0120] Based on this, when determining whether there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group, it can be determined whether the second parameter value group meets the preset first refrigerant shortage condition.

[0121] Optionally, when it is determined that the second parameter value group meets the above first refrigerant shortage condition, it can be determined that there is an abnormality in the current refrigerant amount of the air conditioner unit, and the abnormality is a refrigerant shortage.

[0122] As an exemplary implementation, the first refrigerant shortage condition may include: the number ratio of the first target indoor units in the target indoor units is greater than the first preset number ratio. Among them, the opening ratio between the average opening degree of the electronic expansion valve corresponding to the first target indoor unit and the maximum opening degree of the electronic expansion valve is greater than the first preset opening ratio, such as 45%.

[0123] As another exemplary implementation, the first refrigerant shortage condition may include: the high pressure of the second module is less than or equal to the preset first high pressure threshold, and the first high pressure threshold may be a threshold that the module high pressure meets and is preset, which may be 38°C or other values, and the embodiments of the present application do not limit this.

[0124] As yet another exemplary implementation, the first refrigerant shortage condition may include: the low pressure of the second module is less than or equal to the preset first low pressure threshold, and the first low pressure threshold may be a threshold that the module low pressure meets and is preset, which may be -6°C or other values, and the embodiments of the present application do not limit this.

[0125] As yet another exemplary embodiment, the above first refrigerant shortage condition may include: the number ratio of the first target indoor units in the target indoor units is greater than the first preset number ratio, and the low pressure of the second module is less than or equal to a preset first low pressure threshold value.

[0126] As yet another exemplary embodiment, the above first refrigerant shortage condition may include: the number ratio of the first target indoor units in the target indoor units is greater than the first preset number ratio, and the high pressure of the second module is less than or equal to a preset first high pressure threshold value.

[0127] As yet another exemplary embodiment, the above first refrigerant shortage condition may include: the low pressure of the second module is less than or equal to a preset first low pressure threshold value, and the high pressure of the second module is less than or equal to a preset first high pressure threshold value.

[0128] As yet another exemplary embodiment, the above first refrigerant shortage condition may include: the number ratio of the first target indoor units in the target indoor units is greater than the first preset number ratio, the low pressure of the second module is less than or equal to a preset first low pressure threshold value, and the high pressure of the second module is less than or equal to a preset first high pressure threshold value.

[0129] Further, when the preset mode is the cooling mode, in order to determine whether the refrigerant amount in the air conditioner unit is abnormally over-refrigerated, the above second parameter value group may further include: the third exhaust superheat degree of the air conditioner unit in the first preset time period (the third exhaust superheat degree may be multiple third exhaust superheat degrees in the first preset time period, and when determining that the third exhaust superheat degree meets the corresponding conditions below, multiple third exhaust superheat degrees may be satisfied simultaneously). The determination method of the third exhaust superheat degree may refer to Figure 1 the determination method of the first exhaust superheat degree in the shown process, which will not be elaborated here.

[0130] Based on this, when determining whether there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group, it may be determined whether the second parameter value group meets the preset first over-refrigerant condition.

[0131] Optionally, when it is determined that the second parameter value group meets the preset first over-refrigerant condition, it may be determined that there is an abnormality in the current refrigerant amount of the air conditioner unit, and the abnormality is over-refrigeration.

[0132] As an exemplary embodiment, the above first over-refrigerant condition may include: the number ratio of the second target indoor units in the target indoor units is greater than the second preset number ratio; wherein, the opening ratio between the average electronic expansion valve opening degree corresponding to the second target indoor unit and the maximum opening degree of the electronic expansion valve is less than a preset second preset opening ratio. The above second preset opening ratio is a preset smaller ratio value, and the second preset opening ratio may be less than the above first preset opening ratio, for example, 20%.

[0133] As another exemplary embodiment, the above first over-refrigerant condition may include: the high pressure of the second module is greater than or equal to a preset second high-pressure threshold, and the second high-pressure threshold may be a threshold satisfied by the preset module high pressure, which may be 55°C or other values, and the embodiments of the present application do not limit this.

[0134] As yet another exemplary embodiment, the above first over-refrigerant condition may include: the superheat degree of the third exhaust is less than or equal to a preset first exhaust threshold. The above first exhaust threshold may be an exhaust threshold satisfied by the preset superheat degree of the third exhaust, which may be 15°C or other values, and the embodiments of the present application do not limit this.

[0135] As still another exemplary embodiment, the above first over-refrigerant condition may include: the quantity ratio of the second target indoor units in the target indoor unit is greater than a second preset quantity ratio, and the high pressure of the second module is greater than or equal to a preset second high-pressure threshold.

[0136] As still another exemplary embodiment, the above first over-refrigerant condition may include: the quantity ratio of the second target indoor units in the target indoor unit is greater than a second preset quantity ratio, and the superheat degree of the third exhaust is less than or equal to a preset first exhaust threshold.

[0137] As still another exemplary embodiment, the above first over-refrigerant condition may include: the high pressure of the second module is greater than or equal to a preset second high-pressure threshold, and the superheat degree of the third exhaust is less than or equal to a preset first exhaust threshold.

[0138] As still another exemplary embodiment, the above first over-refrigerant condition may include: the quantity ratio of the second target indoor units in the target indoor unit is greater than a second preset quantity ratio, the high pressure of the second module is greater than or equal to a preset second high-pressure threshold, and the superheat degree of the third exhaust is less than or equal to a preset first exhaust threshold.

[0139] As another alternative implementation, when the preset mode of the air conditioner unit is the heating mode, the above second parameter value group may include: the low pressure of the outdoor module of the outdoor unit within the second preset duration (the low pressure of the outdoor module may be the low pressures of multiple outdoor modules within the first preset duration, and hereinafter, when determining that the low pressure of the outdoor module meets the corresponding conditions, multiple low pressures of the outdoor modules may be satisfied simultaneously), the fourth exhaust superheat degree of the air conditioner unit within the second preset duration (the fourth exhaust superheat degree may be the fourth exhaust superheat degrees of multiple times within the first preset duration, and hereinafter, when determining that the fourth exhaust superheat degree meets the corresponding conditions, multiple fourth exhaust superheat degrees may be satisfied simultaneously), and the high pressure of the third module of the air conditioner unit within the second preset duration (the high pressure of the third module may be the high pressures of multiple third modules within the first preset duration, and hereinafter, when determining that the high pressure of the third module meets the corresponding conditions, multiple high pressures of the third modules may be satisfied simultaneously). Wherein, the above low pressure of the outdoor module can be used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the low pressure side of the outdoor unit of the air conditioner unit, and the above high pressure of the third module can be used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the high pressure side of the air conditioner unit.

[0140] Based on this, when determining whether there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group, it can be determined whether the second parameter value group meets the preset second refrigerant shortage condition.

[0141] Optionally, if it is determined that the second parameter value meets the second refrigerant shortage condition, it can be determined that there is an abnormality in the refrigerant amount in the air conditioner unit, and the abnormality is a refrigerant shortage.

[0142] As an exemplary implementation, the above second refrigerant shortage condition may include: the above low pressure of the outdoor module is less than or equal to a preset outdoor temperature threshold. Wherein, the above outdoor temperature threshold can be determined based on the current outdoor ambient temperature. Optionally, the current outdoor ambient temperature can be obtained, and the preset temperature threshold (such as 20°C) can be subtracted from the outdoor ambient temperature to obtain the above outdoor temperature threshold.

[0143] As another exemplary implementation, the above second refrigerant shortage condition may include: the fourth exhaust superheat degree is greater than or equal to a preset second exhaust threshold. The above second exhaust threshold may be an exhaust threshold satisfied by the fourth exhaust superheat degree set in advance, which may be 40°C or other values, and the embodiments of the present application do not limit this.

[0144] As yet another exemplary implementation, the above second refrigerant shortage condition may include: the high pressure of the third module is greater than or equal to a preset third high pressure threshold. The above third high pressure threshold may be a high pressure threshold satisfied by the fourth module high pressure set in advance, which may be 42°C or other values, and the embodiments of the present application do not limit this.

[0145] As yet another exemplary embodiment, the second refrigerant shortage condition may include: the low pressure of the outdoor module is less than or equal to a preset outdoor temperature threshold, and the fourth exhaust superheat degree is greater than or equal to a preset second exhaust threshold.

[0146] As yet another exemplary embodiment, the second refrigerant shortage condition may include: the low pressure of the outdoor module is less than or equal to a preset outdoor temperature threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0147] As yet another exemplary embodiment, the second refrigerant shortage condition may include: the fourth exhaust superheat degree is greater than or equal to a preset second exhaust threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0148] As yet another exemplary embodiment, the second refrigerant shortage condition may include: the low pressure of the outdoor module is less than or equal to a preset outdoor temperature threshold, the fourth exhaust superheat degree is greater than or equal to a preset second exhaust threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0149] Further, when the preset mode of the air conditioner unit is the heating mode, in order to determine whether the air conditioner unit has excessive refrigerant, the second parameter value group may further include: the exhaust temperature of the air conditioner. The exhaust temperature refers to the temperature value corresponding to the exhaust port of the compressor.

[0150] Based on this, when determining whether there is an abnormality in the refrigerant amount of the air conditioner unit according to the second parameter value group, it may be determined whether the second parameter value group meets a preset second excessive refrigerant condition.

[0151] Optionally, when it is determined that the second parameter value meets the above-mentioned second excessive refrigerant condition, it may be determined that the current refrigerant amount of the air conditioner unit is abnormal, and the abnormality is excessive refrigerant.

[0152] As an exemplary embodiment, the second excessive refrigerant condition may include: the exhaust temperature is less than or equal to a preset exhaust temperature threshold. The exhaust temperature threshold may be a relatively large temperature threshold satisfied by the preset exhaust temperature, which may be 70°C or other values, and the embodiments of the present application do not limit this.

[0153] As another exemplary embodiment, the second excessive refrigerant condition may include: the fourth exhaust superheat degree is less than or equal to a preset second exhaust threshold.

[0154] As yet another exemplary embodiment, the second excessive refrigerant condition may include: the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0155] As yet another exemplary embodiment, the second sub-cooling condition may include: the exhaust temperature is less than or equal to a preset exhaust temperature threshold, and the fourth exhaust superheat is less than or equal to a preset second exhaust threshold.

[0156] As yet another exemplary embodiment, the second sub-cooling condition may include: the exhaust temperature is less than or equal to a preset exhaust temperature threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0157] As yet another exemplary embodiment, the second sub-cooling condition may include: the fourth exhaust superheat is less than or equal to a preset second exhaust threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0158] As yet another exemplary embodiment, the second sub-cooling condition may include: the exhaust temperature is less than or equal to a preset exhaust temperature threshold, the fourth exhaust superheat is less than or equal to a preset second exhaust threshold, and the high pressure of the third module is greater than or equal to a preset third high pressure threshold.

[0159] Optionally, if it is determined that the refrigerant amount in the air conditioner unit is abnormal, step 403 may be continued to further determine the abnormal level of the refrigerant amount in the air conditioner unit.

[0160] Optionally, if it is determined that the refrigerant amount in the air conditioner unit is normal, there is no need to execute the steps of step 403 to further determine the abnormal level of the refrigerant amount in the air conditioner unit.

[0161] Step 403: Control the air conditioner unit to operate in a preset mode at maximum capacity.

[0162] Step 404: For each first preset parameter in the first preset parameter group corresponding to the preset mode, determine the first parameter value of the air conditioner unit corresponding to the first preset parameter to obtain a first parameter value group.

[0163] Step 405: Determine the current abnormal level of the refrigerant amount in the air conditioner unit according to the first parameter value group, and the abnormal level of the refrigerant amount is used to characterize the abnormal procedure of the refrigerant amount.

[0164] Step 406: Prompt the abnormal level of the refrigerant amount.

[0165] For a detailed description of steps 403 to 406, reference may be made to the description in steps 101 to 104, which will not be elaborated here.

[0166] The technical solution provided by the embodiment of the present application obtains a second parameter value group corresponding to a second preset parameter group during the normal operation of the air-conditioning unit, and preliminarily determines whether there is an abnormal refrigerant quantity in the air-conditioning unit based on the second parameter value group. When it is preliminarily determined that there is an abnormal refrigerant quantity in the air-conditioning unit, the air-conditioning unit is controlled to operate at maximum capacity to further determine the abnormal level of the refrigerant quantity in the air-conditioning unit, thereby achieving a preliminary, rapid and accurate judgment on whether there is an abnormal refrigerant quantity in the air-conditioning unit during the normal operation of the air-conditioning unit.

[0167] For ease of understanding Figure 4 The technical solution of the process shown is as follows Figure 5 and Figure 6 The process shown is described.

[0168] See also Figure 5 , is a flow chart of an embodiment of a method for primary determination of the amount of refrigerant in an air-conditioning unit provided in an embodiment of the present application. Figure 5 As shown, the process may include the following steps: 1. During the operation of the unit, the unit collects data in real time through the unit's own temperature sensor, pressure sensor and other general routine functions to determine whether the refrigerant in the system is abnormal.

[0169] 2. Initial judgment of cooling mode abnormality: The judgment conditions corresponding to this cooling mode may include: (1) The unit is detected to be turned on for 5 consecutive minutes without reaching the temperature point, and the average opening of the EXV of more than 50% of the units is more than 45% of the maximum valve opening (Pmax); (2) The module high pressure of the unit is detected to be ≤38℃ for 5 consecutive minutes; (3) The module low pressure of the unit is detected to be ≤-6℃ for 5 consecutive minutes; (4) The unit is detected to be turned on for 5 consecutive minutes without reaching the temperature point, and the average opening of the EXV of more than 50% of the units is less than 20% of the maximum valve opening (Pmax); (5) The module high pressure of the unit is detected to be ≥55℃ for 5 consecutive minutes (effective when the outdoor ambient temperature is <40℃); (6) The exhaust superheat of the unit is detected to be ≤15℃ for 5 consecutive minutes.

[0170] Based on this, it can be determined whether the collected data meets the Figure 5 The three conditions (1), (2) and (3) of the cooling mode can be used to preliminarily determine whether the air-conditioning unit has the refrigerant shortage characteristic, and whether the collected data meets the Figure 5 The three conditions (4), (5) and (6) of the medium cooling mode can be used to preliminarily determine whether there are any refrigerant characteristics.

[0171] 3. Initial judgment of abnormal heating mode: The judgment conditions corresponding to this heating mode may include: (1) The low pressure of the outdoor unit module is detected to be ≤ the outdoor ambient temperature Tenv - 20°C for 5 consecutive minutes; (2) The exhaust superheat of the unit is detected to be ≥ 40°C for 5 consecutive minutes; (3) The high pressure of the unit module is detected to be ≤ 42°C for 5 consecutive minutes; (4) The exhaust temperature of the unit is ≤ 70°C; (5) The exhaust superheat of the unit is detected to be ≤ 15°C for 5 consecutive minutes; (6) The high pressure of the unit module is detected to be ≥ 55°C for 5 consecutive minutes.

[0172] Based on this, it can be determined whether the collected data meets Figure 5 the three conditions (1), (2), and (3) of the heating mode in Figure 5 to initially judge whether the air conditioner unit has the characteristic of lack of refrigerant, and by determining whether the collected data meets

[0173] the three conditions (4), (5), and (6) of the heating mode in Figure 6 to initially judge whether there is the characteristic of excessive refrigerant.

[0174] See Figure 6 which is the flowchart of the embodiment of the method for accurately judging the refrigerant amount of an air conditioner unit provided by the embodiment of the present application. As Figure 6 shown, this process may include the following steps: First, in the waiting-for-confirmation mode, if the time is within the depth confirmation allowed by the customer, the accurate judgment mode is directly started. If it is not within the customer-allowed time period, the accurate judgment mode is started until the allowed time period.

[0175] In the accurate judgment mode, different judgment logics can be executed according to different operating modes.

[0176] Optionally, in the cooling mode, the air conditioner unit can be controlled to operate at full capacity with maximum cooling: (1) All indoor units operate at full capacity for cooling; (2) All indoor units are set to operate at the lowest target temperature (for example, 16°C).

[0177] In this refrigeration mode, the judgment conditions are as follows: (1) The opening degree P of the indoor Exv (the average opening degree of the electronic expansion valve in the indoor unit) ≥ 80% * Pmax (Pmax is the maximum opening degree of the electronic expansion valve), and the exhaust superheat degree ≥ 35°C, it is judged as severely lacking refrigerant; (2) 80% * Pmax > the opening degree P of the indoor exv ≥ 60% * Pmax, and the exhaust superheat degree ≥ 30°C, it is judged as moderately lacking refrigerant; (3) 60% * Pmax > the opening degree P of the indoor Exv ≥ 45% * Pmax, and the exhaust superheat degree ≥ 25°C, it is judged as slightly lacking refrigerant; (4) 45% * Pmax > the opening degree P of the indoor ExV ≥ 20 * Pmax, and 50°C > the exhaust superheat degree ≥ 15°C, it is judged as having a normal refrigerant amount; (5) 20% * Pmax > the opening degree P of the indoor Exv ≥ 15% * Pmax, and the exhaust superheat degree < 40°C, it is judged as having slightly excessive refrigerant; (6) 15% * Pmax > the opening degree P of the indoor ExV ≥ 10% * Pmax, and 30°C > the exhaust superheat degree, it is judged as having moderately excessive refrigerant; (7) 10% * Pmax > the opening degree P of the indoor Exv, and 10°C > the exhaust superheat degree, it is judged as having severely excessive refrigerant.

[0178] Among them, when two or more of the above conditions are met simultaneously, or in other situations, it is processed as "no result".

[0179] Optionally, in the heating mode, the air-conditioning unit can be controlled to operate at full capacity: (1) All indoor units operate at full capacity for heating; (2) All indoor units are set to operate according to the highest target temperature (such as 30°C).

[0180] In this refrigeration mode, the judgment conditions are as follows: (1) The module low pressure < Tenv - 30°C, and the module high pressure ≤ 42°C, it is judged as severely lacking refrigerant; (2) Tenv - 30°C < the module low pressure ≤ Tenv - 20°C, and the module high pressure ≤ 45°C, it is judged as moderately lacking refrigerant; (3) Tenv - 20°C < the module low pressure ≤ Tenv - 15°C, it is judged as slightly lacking refrigerant; (4) 50°C > the exhaust superheat degree ≥ 15°C, and 52°C > the module high pressure ≥ 45°C, it is judged as having a normal refrigerant amount; (5) 15°C < the exhaust superheat degree ≤ 20°C, and the module high pressure ≥ 45°C, it is judged as slightly lacking refrigerant; (6) 10°C < the exhaust superheat degree ≤ 15°C, and the module high pressure ≥ 50°C, it is judged as having moderately excessive refrigerant; (7) The exhaust superheat degree ≤ 10°C, and the module high pressure ≥ 52°C, it is judged as having severely excessive refrigerant.

[0181] Among them, when two or more of the above conditions are met simultaneously, or in other situations, it is processed as "no result".

[0182] Based on the above judgment, after determining the abnormal level of the refrigerant amount corresponding to the air-conditioning unit, the control strategy can be adjusted according to the refrigerant classification prompt. Regarding this control strategy, it can be described in the following text through Figure 7 andFigure 8 The process shown will not be elaborated here for the time being.

[0183] In the technical solution provided by the embodiment of the present application, by capturing data during the normal use of the air-conditioning unit for judgment, it is possible to estimate whether the refrigerant amount in the current system is abnormal. Among them, after the primary judgment, the operation of the air-conditioning unit is not adjusted. When the air-conditioning unit is idle (note: the allowable free control time set by the user or the manager to avoid discomfort to the air-conditioning user), the precise judgment mode of the refrigerant amount is started. In this precise judgment mode, the unit operates at full open and maximum capacity, and the judgment is more accurate, which can prevent misjudgment.

[0184] See Figure 7 , which is a flowchart of an embodiment of a method for prompting abnormal refrigerant amount of an air-conditioning unit provided by the embodiment of the present application. Figure 7 The process shown is based on the process shown in Figures 1 to 6 and describes the control of the operation of the air-conditioning unit after determining the abnormal level of the current refrigerant amount in the air-conditioning unit. As shown in Figure 7 , the process may include the following steps: Step 701, determine the control strategy corresponding to the abnormal level of the refrigerant amount.

[0185] Step 702, control the operation of the air-conditioning unit according to the above control strategy.

[0186] The following is a unified description of Step 701 and Step 702: The above control strategy refers to the strategy for adjusting the operation of the air-conditioning unit.

[0187] In the embodiment of the present application, after determining the abnormal level of the current refrigerant amount in the air-conditioning unit through the process shown in Figures 1 to 6 , the control strategy corresponding to the abnormal level of the refrigerant amount can be determined to control the operation of the air-conditioning unit according to the control strategy, so as to ensure user comfort while avoiding damage to the air-conditioning unit.

[0188] As an optional implementation manner, when it is determined that the abnormal level of the refrigerant amount in the air-conditioning unit is mild refrigerant shortage or mild over-refrigerant, the air-conditioning unit can be controlled to operate according to the target operation mode, and a preset first-level identifier is output; the above target operation mode is the mode to be operated by the obtained air-conditioning unit, that is, the operation mode set by the user.

[0189] As another optional implementation manner, when it is determined that the abnormal level of the refrigerant amount in the air-conditioning unit is moderate refrigerant shortage or moderate over-refrigerant, in order to avoid damage to the air-conditioning unit, the maximum operation capacity of the air-conditioning unit can be restricted according to a preset ratio, and a preset second-level identifier is output. The above preset ratio can be a ratio value of the preset maximum operation capacity, such as 80%.

[0190] As another alternative implementation, when it is determined that the refrigerant amount abnormality level of the air conditioner unit is severely lacking refrigerant or severely over-refrigerated, in order to protect the air conditioner unit, the operation of the air conditioner unit can be controlled to stop, and a preset third-level identifier can be output.

[0191] To facilitate understanding of the control strategy provided in the embodiments of the present application, the following will give an example through Figure 8 the following shown process.

[0192] Refer to Figure 8 , which is a flowchart of an embodiment of a control method for adjusting refrigerant amount abnormality strategy provided in the embodiments of the present application. Figure 8 The following shown process can be based on Figure 6 and Figure 7 the following shown processes, and describes how to specifically adjust the control of the air conditioner unit after determining the refrigerant amount abnormality level. As Figure 8 shown, the control strategy may include: Optionally, if the determination result of the refrigerant amount abnormality level is: no result, where for conflicting judgment conditions or those that satisfy both conditions simultaneously, it is displayed as "no result". In this case, since no professional reference can be provided, it operates normally first.

[0193] Optionally, if the determination result of the refrigerant amount abnormality level is: mild lack / over-refrigerant situation, due to the relatively mild situation, to ensure comfort, the corresponding refrigerant classification prompt adjustment strategy is: execute normal control and give a prompt at the same time.

[0194] Optionally, if the determination result of the refrigerant amount abnormality level is: moderate lack / over-refrigerant situation, to ensure reliability and take into account comfort, the corresponding refrigerant classification prompt adjustment strategy is: limit the maximum capacity of the unit to 80%, avoid damage caused by too high compressor frequency, and at the same time continue to provide air conditioning services.

[0195] Optionally, if the determination result of the refrigerant amount abnormality level is: severe lack / over-refrigerant situation, at this time the lack / over-refrigerant is already very serious and the unit may break down at any time. The corresponding refrigerant classification prompt adjustment strategy is: the air conditioner unit needs to be shut down for maintenance.

[0196] The technical solution provided in the embodiments of the present application can determine the control strategy corresponding to the refrigerant amount abnormality level after determining the current refrigerant amount abnormality level in the air conditioner unit, and control the operation of the air conditioner unit according to this control strategy. This technical solution can ensure the safe operation of the air conditioner unit while ensuring user comfort by providing different control strategies for different refrigerant amount abnormality levels.

[0197] Refer to Figure 9, which is a block diagram of an embodiment of a refrigerant amount abnormality prompting device for an air conditioner unit provided by an embodiment of the present application. As Figure 9 shown, the device may include: A control module 91, configured to control the air conditioner unit to operate in a preset mode according to the maximum capacity; A first determination module 92, configured to determine, for each first preset parameter in a first preset parameter group corresponding to the preset mode, a first parameter value of the air conditioner unit corresponding to the first preset parameter, to obtain a first parameter value group; A second determination module 93, configured to determine, according to the first parameter value group, a current refrigerant amount abnormality level in the air conditioner unit, where the refrigerant amount abnormality level is used to characterize the abnormality degree of the refrigerant amount; A prompting module 94, configured to prompt the refrigerant amount abnormality level.

[0198] Refer to Figure 10 , which is a schematic structural diagram of an air conditioner provided by an embodiment of the present application, including a processor 1001, a communication interface 1002, a memory 1003, and a communication bus 1004. Among them, the processor 1001, the communication interface 1002, and the memory 1003 complete mutual communication through the communication bus 1004, The memory 1003 is used to store a computer program; In an embodiment of the present application, when the processor 1001 is configured to execute the program stored on the memory 1003, it implements the refrigerant amount abnormality prompting method for the air conditioner unit provided by any one of the foregoing method embodiments, including: Controlling the air conditioner unit to operate in a preset mode according to the maximum capacity; For each first preset parameter in a first preset parameter group corresponding to the preset mode, determining a first parameter value of the air conditioner unit corresponding to the first preset parameter, to obtain a first parameter value group; According to the first parameter value group, determining a current refrigerant amount abnormality level in the air conditioner unit, where the refrigerant amount abnormality level is used to characterize the abnormality degree of the refrigerant amount; Prompting the refrigerant amount abnormality level.

[0199] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the refrigerant amount abnormality prompting method for the air conditioner unit provided by any one of the foregoing method embodiments.

[0200] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0201] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0202] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of execution is explicitly stated. It should also be understood that additional or alternative steps can be used.

[0203] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for abnormally prompting the refrigerant amount of an air-conditioning unit, characterized in that, The method includes: Controlling the air conditioner unit to operate in a preset mode at maximum capacity; For each first preset parameter in the first preset parameter group corresponding to the preset mode, determining the first parameter value of the air conditioner unit corresponding to the first preset parameter to obtain a first parameter value group; wherein, when the preset mode is the cooling mode, the first parameter value group includes: the average opening degree of the electronic expansion valves of all the indoor units and the first exhaust superheat degree of the air conditioner unit; Determining the current refrigerant amount abnormality level inside the air conditioner unit according to the first parameter value group, and the refrigerant amount abnormality level is used to characterize the abnormality degree of the refrigerant amount; Prompting the refrigerant amount abnormality level.

2. The method according to claim 1, wherein The controlling the air conditioner unit to operate in a preset mode at maximum capacity includes: Determining whether the current moment is within a preset time period; When it is determined that the current moment is within the preset time period, controlling the air conditioner unit to operate in the preset mode at maximum capacity; When it is determined that the current moment is not within the preset time period, after reaching the preset time period, controlling the air conditioner unit to operate in the preset mode at maximum capacity.

3. The method according to claim 1, characterized in that, The controlling the air conditioner unit to operate in a preset mode at maximum capacity includes: When the preset mode is the cooling mode, controlling all the indoor units to operate at the lowest temperature of the cooling mode; When the preset mode is the heating mode, controlling all the indoor units to operate at the highest temperature of the heating mode.

4. The method according to claim 1, wherein When the preset mode is the cooling mode, the determining the current refrigerant amount abnormality level inside the air conditioner unit according to the first parameter value group includes: Determining the target opening degree range to which the average opening degree belongs from a plurality of preset opening degree ranges; Obtaining the superheat degree threshold value corresponding to the target opening degree range, and comparing the first exhaust superheat degree with the superheat degree threshold value to obtain a first comparison result; Determining the current refrigerant amount abnormality level inside the air conditioner unit according to the target opening degree range and the first comparison result.

5. The method according to claim 4, wherein The determining the current refrigerant amount abnormality level inside the air conditioner unit according to the target opening degree range and the first comparison result includes: When it is determined that the target opening degree range belongs to the first type of opening degree range and the first comparison result indicates that the first exhaust superheat degree is greater than or equal to the superheat degree threshold value, determining that the current refrigerant amount abnormality level inside the air conditioner unit is the refrigerant shortage abnormality level; wherein, the refrigerant shortage degree corresponding to the refrigerant shortage abnormality level is positively correlated with the opening degree value within the first type of opening degree range, and the opening degree value within the first type of opening degree range is positively correlated with the superheat degree threshold value; When it is determined that the target opening range belongs to the second type of opening range and the first comparison result indicates that the first exhaust superheat degree is less than the superheat degree threshold, determine that the current refrigerant amount abnormality level in the air conditioner unit is the over-refrigerant abnormality level; wherein, the opening value within the first type of opening range is greater than the opening value within the second type of opening range, the over-refrigerant degree corresponding to the over-refrigerant abnormality level is negatively correlated with the opening value within the second type of opening range, and the opening value within the second type of opening range is positively correlated with the superheat degree threshold.

6. The method according to claim 1, characterized in that When the preset mode is the heating mode, the first parameter value group includes: the high pressure of the first module of the air conditioner unit and the low pressure of the first module of the air conditioner unit; wherein, the high pressure of the first module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the high-pressure side of the air conditioner unit, and the low pressure of the first module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the low-pressure side of the air conditioner unit; Determining the current refrigerant amount abnormality level in the air conditioner unit according to the first parameter value group includes: Obtain the current outdoor ambient temperature value, and determine a plurality of low-pressure ranges according to the outdoor ambient temperature value; Determine the target low-pressure range to which the low pressure of the first module belongs from the plurality of low-pressure ranges; Obtain the module high-pressure threshold corresponding to the target low-pressure range, and determine whether the high pressure of the first module is less than or equal to the module high-pressure threshold; When it is determined that the high pressure of the first module is less than or equal to the module high-pressure threshold, determine that the current refrigerant amount abnormality level in the air conditioner unit is the refrigerant shortage abnormality level corresponding to the target low-pressure range; wherein, the refrigerant shortage degree corresponding to the refrigerant shortage abnormality level of the air conditioner unit is negatively correlated with both the low pressure of the first module and the high pressure of the first module.

7. The method according to claim 6, wherein The first parameter value group further includes: the second exhaust superheat degree of the air conditioner unit; Determining the current refrigerant amount abnormality level in the air conditioner unit according to the first parameter value group includes: Determine the target superheat degree range to which the second exhaust superheat degree belongs from a preset plurality of superheat degree ranges; Obtain the new module high-pressure threshold corresponding to the target superheat degree range, and determine whether the high pressure of the first module is greater than or equal to the new module high-pressure threshold; When it is determined that the high pressure of the first module is greater than or equal to the new module high-pressure threshold, determine that the current refrigerant amount abnormality level in the air conditioner unit is the over-refrigerant abnormality level corresponding to the target superheat degree range; wherein, the over-refrigerant degree corresponding to the over-refrigerant abnormality level of the air conditioner unit is negatively correlated with the second exhaust superheat degree and positively correlated with the new module high-pressure threshold.

8. The method according to claim 1, characterized in that Before controlling the air conditioner unit to operate in the preset mode with maximum capacity, it further includes: After detecting that the air conditioner unit operates in the preset mode for a preset duration, for each second preset parameter in the second preset parameter group corresponding to the preset mode, determine the second parameter value of the air conditioner unit corresponding to the second preset parameter to obtain a second parameter value group; When it is determined that there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group, perform the step of controlling the air conditioner unit to operate in a preset mode with the maximum capacity.

9. The method according to claim 8, characterized in that, When the preset mode is the cooling mode, the second parameter value group includes: the average electronic expansion valve opening degree of the target indoor unit within the first preset time period, the high pressure of the second module of the air conditioner unit within the first preset time period, and the low pressure of the second module of the air conditioner unit within the first preset time period; wherein, the target indoor unit is an indoor unit that has not reached the preset temperature value within the first preset time period, the high pressure of the second module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the high pressure side of the air conditioner unit, and the low pressure of the second module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the low pressure side of the air conditioner unit; Determining that there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group includes: Determining whether the second parameter value group meets a preset first refrigerant shortage condition; When it is determined that the second parameter value group meets the first refrigerant shortage condition, determine that the air conditioner unit is currently short of refrigerant; Wherein, the first refrigerant shortage condition includes: The number ratio of the first target indoor units in the target indoor units is greater than the first preset number ratio; wherein, the opening ratio between the average electronic expansion valve opening degree corresponding to the first target indoor unit and the maximum opening degree of the electronic expansion valve is greater than the first preset opening ratio; And / or, The high pressure of the second module is less than or equal to a preset first high pressure threshold; And / or, The low pressure of the second module is less than or equal to a preset first low pressure threshold.

10. The method according to claim 9, characterized in that, The second parameter value group further includes: the third exhaust superheat degree of the air conditioner unit within the first preset time period; Determining that there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group includes: Determining whether the second parameter value group meets a preset first over-refrigerant condition; When it is determined that the second parameter value group meets the first over-refrigerant condition, determine that the air conditioner unit is currently over-refrigerated; Wherein, the first over-refrigerant condition includes: The number ratio of the second target indoor units in the target indoor units is greater than the second preset number ratio; wherein, the opening ratio between the average electronic expansion valve opening degree corresponding to the second target indoor unit and the maximum opening degree of the electronic expansion valve is less than the second preset opening ratio; And / or, The high pressure of the second module is greater than or equal to a preset second high pressure threshold; And / or, The third exhaust superheat degree is less than or equal to a preset first exhaust threshold.

11. The method according to claim 8, wherein When the preset mode is the heating mode, the second parameter value group includes: the low pressure of the outdoor module of the outdoor unit within the second preset time period, the fourth exhaust superheat degree of the air conditioner unit within the second preset time period, and the high pressure of the third module of the air conditioner unit within the second preset time period; wherein, the low pressure of the outdoor module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the low pressure side of the outdoor unit of the air conditioner unit, and the high pressure of the third module is used to represent the saturation temperature corresponding to the refrigerant saturation pressure on the high pressure side of the air conditioner unit; Determining that there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group includes: Determining whether the second parameter value group meets a preset second refrigerant shortage condition; When it is determined that the first parameter value group meets the second refrigerant shortage condition, determining that the air conditioner unit is currently short of refrigerant; Wherein, the second refrigerant shortage condition includes: The low pressure of the outdoor module is less than or equal to a preset outdoor temperature threshold; wherein, the outdoor temperature threshold is determined based on the current outdoor ambient temperature; And / or, The fourth exhaust superheat degree is greater than or equal to a preset second exhaust threshold; And / or, The high pressure of the third module is greater than or equal to a preset third high pressure threshold.

12. The method according to claim 11, wherein The second parameter value group further includes: the exhaust temperature of the air conditioner unit; Determining that there is an abnormality in the refrigerant amount in the air conditioner unit according to the second parameter value group includes: Determining whether the second parameter value group meets a preset second over-refrigerant condition; When it is determined that the second parameter value group meets the second over-refrigerant condition, determining that the air conditioner unit is currently over-refrigerated; Wherein, the second over-refrigerant condition includes: The exhaust temperature is less than or equal to a preset exhaust temperature threshold; And / or, The fourth exhaust superheat degree is less than or equal to a preset second exhaust threshold; And / or, The high pressure of the third module is greater than or equal to a preset third high pressure threshold.

13. The method according to claim 1, characterized in that, Prompting the abnormal level of the refrigerant amount includes: Determining a prompt identifier corresponding to the abnormal level of the refrigerant amount; Prompting the abnormal level of the refrigerant amount by outputting the prompt identifier.

14. The method according to claim 1, wherein After determining the current abnormal level of the refrigerant amount in the air conditioner unit, it further includes: Determining a control strategy corresponding to the abnormal level of the refrigerant amount; Controlling the operation of the air conditioner unit according to the control strategy.

15. A refrigerant quantity abnormal prompt device for an air conditioner unit, characterized in that, The device includes: A control module, configured to control the air conditioner unit to operate in a preset mode with maximum capacity; A first determination module, configured to determine, for each first preset parameter in the first preset parameter group corresponding to the preset mode, a first parameter value of the air conditioner unit corresponding to the first preset parameter, to obtain a first parameter value group; A second determination module, configured to determine, according to the first parameter value group, the current abnormal level of the refrigerant amount in the air conditioner unit, where the abnormal level of the refrigerant amount is used to characterize the abnormal degree of the refrigerant amount; A prompt module, configured to prompt the abnormal level of the refrigerant amount.

16. An air conditioner, characterized in that, Including: A processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete mutual communication through the communication bus; the memory is used to store a computer program; the processor is configured to, when executing the computer program, implement the method for prompting abnormal refrigerant amount of the air conditioner unit according to any one of claims 1-14.

17. A storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by the processor, it implements the method for prompting abnormal refrigerant amount of the air conditioner unit according to any one of claims 1-14.

Images