Method and device for controlling air conditioning system and air conditioning system

Abstract

The invention relates to the technical field of air conditioners, and discloses a method for controlling an air conditioning system, the air conditioning system comprises a plurality of indoor units, and each indoor unit is correspondingly provided with an indoor unit valve; the method comprises the steps that a target indoor unit needing to be adjusted is preliminarily determined; according to the superheat degree parameter of the outdoor unit of the air conditioning system, the air pipe temperature of each indoor unit and the opening degree of each indoor unit valve, the final adjusting requirement of the target indoor unit is determined; and under the condition that the target indoor unit finally needs to be adjusted, the target superheat degree of the target indoor unit is corrected. In this way, the target indoor unit needing to be adjusted can be accurately determined, and the refrigeration effect of the indoor unit is guaranteed by controlling the target superheat degree of the target indoor unit. The invention further discloses a device for controlling the air conditioning system and the air conditioning system.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for controlling an air conditioner system, and an air conditioner system. Background Art

[0002] Currently, in a commercial multi-split air conditioner system, there are certain differences in the lengths of the pipelines of each indoor unit. Due to factors such as the length and pressure loss of the indoor unit pipelines, the state of the refrigeration refrigerant reaching each indoor unit will be different. This will cause a flow deviation problem. Even if the same superheat degree is used to control each indoor unit (the same model or different models), there will be differences in the opening degrees of the indoor unit valves.

[0003] In the related art, in order to ensure that the air conditioner system does not have liquid return, sometimes the opening degree of the indoor unit valve is controlled too small. If the opening degree of the indoor unit valve is too small, the overall refrigerant circulation volume will be too low, resulting in poor refrigeration effect and affecting the user experience.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0006] The embodiments of the present disclosure provide a method and device for controlling an air conditioner system, and an air conditioner system to ensure the refrigeration effect of the indoor unit.

[0007] In some embodiments, the method for controlling an air conditioner system includes: the air conditioner system includes multiple indoor units, and an indoor unit valve is correspondingly arranged for each indoor unit; the method includes: preliminarily determining a target indoor unit to be adjusted; determining the final adjustment requirement of the target indoor unit according to the superheat degree parameter of the outdoor unit of the air conditioner system, the trachea temperature of each indoor unit, and the opening degree of each indoor unit valve; and correcting the target superheat degree of the target indoor unit in the case where the target indoor unit finally needs to be adjusted. First, preliminarily confirm the target indoor unit to be adjusted, and roughly judge the indoor unit with flow deviation. Then, combine the superheat degree parameter of the outdoor unit, the trachea temperature, and the opening degree of the indoor unit valve to determine the final adjustment requirement of the target indoor unit, that is, perform precise judgment of flow deviation on the basis of the rough judgment. If the judgment result indicates that the target indoor unit needs to be adjusted, then correct the target superheat degree of the target indoor unit. In this way, the target indoor unit to be adjusted can be accurately determined, and by controlling the target superheat degree of the target indoor unit, the refrigeration effect of the indoor unit can be ensured.

[0008] In some embodiments, the target indoor unit that needs to be adjusted initially includes: obtaining the tracheal temperature of each indoor unit and the opening degree of the corresponding indoor unit valve; determining the indoor unit corresponding to the tracheal with the highest temperature and the indoor unit valve with an opening degree greater than the first opening degree threshold as the target indoor unit. A high tracheal temperature or a large opening degree of the indoor unit valve indicates that the refrigerant flow rate of the corresponding indoor unit may be large and there may be uneven flow. Therefore, the indoor unit corresponding to the tracheal with the highest temperature and the indoor unit valve with an opening degree greater than the first opening degree threshold is initially determined as the target indoor unit.

[0009] In some embodiments, the superheat parameters of the outdoor unit include: discharge superheat and suction superheat; determining the final adjustment requirement of the target indoor unit according to the superheat parameters of the outdoor unit of the air conditioning system, the tracheal temperature of each indoor unit, and the opening degree of each indoor unit valve includes: calculating the average temperature of the tracheal temperatures of all indoor units and the average opening degree of all indoor unit valves; determining the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree. Based on the average temperature / average opening degree as a reference, it is possible to judge the tracheal with a high temperature and the indoor unit valve with a large opening degree, and then obtain the target indoor unit where uneven flow may occur. At the same time, refrigerant uneven flow will be reflected by the discharge superheat and the suction superheat. Generally, the more serious the uneven flow, the greater the discharge superheat and the suction superheat. Therefore, it is necessary to combine the discharge superheat and the suction superheat of the outdoor unit to accurately determine the final adjustment requirement of the target indoor unit.

[0010] In some embodiments, determining the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree includes: when the discharge superheat is greater than the first superheat threshold, the suction superheat is greater than the second superheat threshold, and the tracheal temperature of the target indoor unit is greater than the first temperature threshold and the opening degree of the indoor unit valve corresponding to the target indoor unit is greater than the second opening degree threshold, determining that the target indoor unit needs to be adjusted; where the first temperature threshold is related to the average temperature; the second opening degree threshold is related to the average opening degree. In this case, the discharge temperature, the suction temperature, and the tracheal temperature are all relatively high, and the opening degree of the indoor unit valve is also relatively large, indicating that there is an uneven flow problem in the corresponding target indoor unit, and then it is determined that the target indoor unit needs to be adjusted.

[0011] In some embodiments, the final adjustment requirement of the target indoor unit is determined according to the exhaust superheat, the intake superheat, the average temperature and the average opening, including: when the exhaust superheat is less than or equal to the first superheat threshold and greater than the third superheat threshold, and the intake superheat is less than or equal to the second superheat threshold and greater than the fourth superheat threshold, and the air pipe temperature corresponding to the target indoor unit is less than the second temperature threshold, it is determined that the target indoor unit does not need to be adjusted; wherein, the second temperature threshold is related to the average temperature. In this case, the air pipe temperature is relatively low, indicating that the probability of the corresponding indoor unit having a bias flow problem is low, and it is determined that the target indoor unit does not need to be adjusted. At the same time, judging the exhaust superheat and the intake superheat can ensure that there is no liquid return in the outdoor unit before the target superheat of the indoor unit is adjusted.

[0012] In some embodiments, the final adjustment requirement of the target indoor unit is determined according to the exhaust superheat, the intake superheat, the average temperature and the average opening, and further includes: when the exhaust superheat is less than or equal to the third superheat threshold, and / or the intake superheat is less than or equal to the fourth superheat threshold, and / or the air pipe temperature corresponding to the target indoor unit is greater than or equal to the second temperature threshold, re-preliminarily determining the target indoor unit that needs to be adjusted. This situation indicates that the indoor unit valve has not been adjusted well, and the indoor unit valve opening is too small, so the target indoor unit that needs to be adjusted is re-preliminarily determined.

[0013] In some embodiments, the second temperature threshold is determined by: calculating the average temperature value of all the air pipe temperatures; and taking the product of the average temperature value and the first coefficient as the first temperature threshold. In this way, the average temperature value of all air pipe temperatures is adjusted by the first coefficient, and the product of the two is taken as one of the conditions for judging whether the target indoor unit needs to be adjusted, so as to ensure the accuracy of the judgment condition.

[0014] In some embodiments, the correcting the target superheat of the target indoor unit includes: making a negative correction to the target superheat of the target indoor unit. The target superheat of the target indoor unit is reduced by controlling the opening of the indoor unit valve corresponding to the target indoor unit, thereby improving the flow deviation problem of the target indoor unit.

[0015] In some embodiments, the apparatus for controlling an air conditioning system includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling an air conditioning system when running the program instructions.

[0016] In some embodiments, the air conditioning system includes: an air conditioning system body; and the aforementioned device for controlling the air conditioning system is installed in the air conditioning system body.

[0017] In some embodiments, the computer-readable storage medium stores program instructions that, when running, execute the aforementioned method for controlling an air-conditioning system.

[0018] The method, device, and air-conditioning system for controlling an air-conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] First, preliminarily confirm the target indoor unit that needs to be adjusted, and roughly judge the indoor units with flow deviation. Then, combine the superheat parameter of the outdoor unit, the refrigerant pipe temperature, and the indoor unit valve opening to determine the final adjustment requirement of the target indoor unit, that is, make a precise judgment of the flow deviation on the basis of the rough judgment. If the judgment result indicates that the target indoor unit needs to be adjusted, correct the target superheat of the target indoor unit. In this way, the target indoor unit that needs to be adjusted can be accurately determined, and by controlling the target superheat of the target indoor unit, the refrigeration effect of the indoor unit can be ensured.

[0020] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by the corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0022] Figure 1 is a schematic diagram of an air-conditioning system provided by an embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of a method for controlling an air-conditioning system provided by an embodiment of the present disclosure;

[0024] Figure 3 is a schematic diagram of another method for controlling an air-conditioning system provided by an embodiment of the present disclosure;

[0025] Figure 4 is a schematic diagram of another method for controlling an air-conditioning system provided by an embodiment of the present disclosure;

[0026] Figure 5 is an application schematic diagram of a method for controlling an air-conditioning system according to an embodiment of the present disclosure;

[0027] Figure 6 is a schematic diagram of a device for controlling an air-conditioning system provided by an embodiment of the present disclosure;

[0028] Figure 7 is a schematic diagram of another device for controlling an air-conditioning system provided by an embodiment of the present disclosure;

[0029] Figure 8 It is a schematic diagram of an air-conditioning system provided by an embodiment of the present disclosure.

[0030] Reference numerals:

[0031] 10, compressor; 20, outdoor unit; 30, liquid pipe; 40, gas pipe; 50, indoor unit; 51, indoor unit valve;

[0032] 60, device for controlling the air-conditioning system; 61, first determination module; 62, second determination module; 63, correction module;

[0033] 70, device for controlling the air-conditioning system; 71, processor; 72, memory; 73, communication interface; 74, bus;

[0034] 80, air-conditioning system. Detailed implementation manners

[0035] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0036] In the embodiments of the present disclosure, terms such as "first" and "second" in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0037] Unless otherwise specified, the term "plurality" means two or more.

[0038] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0039] The term "and / or" is a description of the associated relationship of an object and indicates that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0040] The term "corresponding" can refer to an associated relationship or a binding relationship. That A corresponds to B means that there is an associated relationship or a binding relationship between A and B.

[0041] In combination with Figure 1As shown in the figure, an embodiment of the present disclosure provides an air conditioning system. The air conditioning system includes: an outdoor unit 20 and multiple indoor units 50. The multiple indoor units 50 are connected in parallel to form a "one - to - many" air conditioning system.

[0042] Each indoor unit 50 is connected to the outdoor unit 20 through a liquid pipe 30, and the outdoor unit 20 is connected to a compressor 10. The compressor 10 is connected to each indoor unit 50 through an air pipe 40. Among them, each indoor unit 50 corresponds to an air pipe 40 respectively.

[0043] Each indoor unit 50 is correspondingly provided with an indoor unit valve 51 for adjusting the amount of refrigerant flowing into the corresponding indoor unit 50. Each indoor unit 50 is connected to the liquid pipe 30 through its corresponding indoor unit valve 51.

[0044] A temperature sensor is provided on each air pipe 40 to obtain the temperature Tc of the corresponding air pipe 40.

[0045] Combined with Figure 2 As shown in the figure, an embodiment of the present disclosure provides a method for controlling an air conditioning system, including:

[0046] S201, the processor preliminarily determines the target indoor unit that needs to be adjusted.

[0047] S202, the processor determines the final adjustment requirement of the target indoor unit according to the superheat parameter of the outdoor unit of the air conditioning system, the air pipe temperature of each indoor unit, and the opening degree of each indoor unit valve.

[0048] S203, when the target indoor unit finally needs to be adjusted, the processor corrects the target superheat of the target indoor unit.

[0049] Among all the indoor units, preliminarily determine the indoor unit that needs to be adjusted, and define this indoor unit as the target indoor unit. The target indoor unit can be one or multiple. According to the superheat parameter of the outdoor unit, the air pipe temperature corresponding to each indoor unit, and the opening degree of the indoor unit valve corresponding to each indoor unit, further determine the final adjustment requirement of the target indoor unit. If it is determined that the target indoor unit has no adjustment requirement, then control the target indoor unit to continue running according to the current operating parameters. If it is determined that the target indoor unit has an adjustment requirement, then correct the target superheat of the target indoor unit.

[0050] Using the method for controlling an air conditioning system provided by the embodiment of the present disclosure, first preliminarily confirm the target indoor unit that needs to be adjusted, and roughly judge the indoor unit with uneven flow. Then, combine the superheat parameter of the outdoor unit, the air pipe temperature, and the opening degree of the indoor unit valve to determine the final adjustment requirement of the target indoor unit, that is, perform precise judgment of uneven flow on the basis of rough judgment. If the judgment result indicates that the target indoor unit needs to be adjusted, then correct the target superheat of the target indoor unit. In this way, the target indoor unit that needs to be adjusted can be accurately determined, and by controlling the target superheat of the target indoor unit, the refrigeration effect of the indoor unit can be ensured.

[0051] Optionally, after the air-conditioning system operates normally, S201 to S203 are executed to ensure the accurate identification of the target indoor unit.

[0052] Optionally, when the suction pressure of the air-conditioning system is within a first preset range and the exhaust temperature is within a second preset range, it is determined that the air-conditioning system operates normally. Optionally, the first preset range is 5 bar to 7 bar. The second preset range is taken as 60 °C to 90 °C.

[0053] Optionally, when the air-conditioning system operates for a first set duration, it is determined that the air-conditioning system operates normally. Optionally, the first set duration ranges from 20 minutes to 25 minutes.

[0054] Combined with Figure 3 , the embodiments of the present disclosure provide another method for controlling an air-conditioning system, including:

[0055] S211, the processor obtains the tracheal temperature of each indoor unit and the opening degree of the corresponding indoor unit valve.

[0056] S221, the processor determines the indoor unit corresponding to the trachea with the highest temperature and the indoor unit valve with an opening degree greater than the first opening degree threshold as the target indoor unit.

[0057] S202, the processor determines the final adjustment requirement of the target indoor unit according to the superheat parameter of the outdoor unit of the air-conditioning system, the tracheal temperature of each indoor unit, and the opening degree of each indoor unit valve.

[0058] S203, when the target indoor unit finally needs to be adjusted, the processor corrects the target superheat of the target indoor unit.

[0059] When initially determining the target indoor unit that needs to be adjusted, first obtain the tracheal temperature corresponding to each indoor unit, and obtain the opening degree of the indoor unit valve corresponding to each indoor unit. Judge the high and low of the tracheal temperature and the size of the opening degree of the indoor unit valve. A high tracheal temperature or a large opening degree of the indoor unit valve indicates that the refrigerant flow rate of the corresponding indoor unit may be large, and there may be a deviation in flow. Therefore, the indoor unit corresponding to the trachea with the highest temperature and the indoor unit valve with an opening degree greater than the first opening degree threshold A1 is initially determined as the target indoor unit.

[0060] Optionally, the first opening degree threshold A1 is set to 200 pls.

[0061] Combined with Figure 4 shown, the embodiments of the present disclosure provide a method for controlling an air-conditioning system, including:

[0062] S201, the processor initially determines the target indoor unit that needs to be adjusted.

[0063] S212, the processor calculates the average temperature of the tracheal temperatures of all indoor units and the average opening degree of all indoor unit valves.

[0064] S222. The processor determines the final adjustment requirement of the target indoor unit according to the exhaust superheat degree, the suction superheat degree, the average temperature, and the average opening degree.

[0065] S203. When the target indoor unit finally needs to be adjusted, the processor corrects the target superheat degree of the target indoor unit.

[0066] When determining the final adjustment requirement of the target indoor unit, first calculate the average value of the trachea temperatures corresponding to all indoor units according to formula (1) to obtain the average temperature:

[0067] Tc = (Tc1 + Tc2 + …… + Tcn) / n Formula (1)

[0068] Wherein, Tc is the average temperature, Tcn is the trachea temperature corresponding to the nth indoor unit, and n is the total number of indoor units.

[0069] The average temperature can reflect the average level of all trachea temperatures.

[0070] And calculate the average value of the opening degrees of all indoor unit valves according to formula (2) to obtain the average opening degree:

[0071] LEV = (LEV1 + LEV2 + …… + LEVn) / n Formula (2)

[0072] Wherein, LEV is the average opening degree, LEVn is the opening degree of the indoor unit valve corresponding to the nth indoor unit, and n is the total number of indoor units.

[0073] The average opening degree can reflect the average level of the opening degrees of all indoor unit valves.

[0074] Based on the average temperature / average opening degree, it is possible to judge the trachea with a high temperature and the indoor unit valve with a large opening degree, and then obtain the target indoor unit where partial flow may occur. At the same time, the refrigerant partial flow will be reflected by the exhaust superheat degree and the suction superheat degree. Usually, the more serious the partial flow is, the greater the exhaust superheat degree and the suction superheat degree are. Therefore, it is necessary to accurately determine the final adjustment requirement of the target indoor unit by combining the exhaust superheat degree and the suction superheat degree of the outdoor unit.

[0075] Optionally, in S222, the processor determines the final adjustment requirement of the target indoor unit according to the exhaust superheat degree, the suction superheat degree, the average temperature, and the average opening degree, including:

[0076] When the exhaust superheat degree is greater than the first superheat degree threshold, the suction superheat degree is greater than the second superheat degree threshold, and the trachea temperature of the target indoor unit is greater than the first temperature threshold and the opening degree of the indoor unit valve corresponding to the target indoor unit is greater than the second opening degree threshold, the processor determines that the target indoor unit needs to be adjusted; wherein, the first temperature threshold is related to the average temperature; the second opening degree threshold is related to the average opening degree.

[0077] Set the first superheat threshold Tg1, the second superheat threshold Tg2, the first temperature threshold T1, and the second opening threshold A2.

[0078] If Tpq>Tg1, Txq>Tg2, Tcm>T1, and LEVm>A2 are satisfied simultaneously, at this time, the trachea temperatures are all relatively high and the opening degrees of the indoor unit valves are also relatively large, indicating that there is a problem of uneven flow in the corresponding target indoor unit, and then it is determined that the target indoor unit needs to be adjusted. Among them, Tpq is the exhaust superheat, Txq is the suction superheat, Tcm is the trachea temperature of the target indoor unit, and LEVm is the opening degree of the indoor unit valve corresponding to the target indoor unit.

[0079] At the same time, judging the exhaust superheat and the suction superheat can ensure that there is no liquid return in the outdoor unit before adjusting the target superheat of the indoor unit.

[0080] Among them, the first temperature threshold is related to the average temperature, and the second opening threshold is related to the average opening degree. In this way, based on the first temperature threshold and the second opening threshold related to the average level of the trachea temperature and the average level of the indoor unit valve opening degree, comparing with the exhaust temperature and the indoor unit valve opening degree of the target indoor unit, the uneven flow result of the target indoor unit can be obtained more accurately.

[0081] Optionally, Tg1 is set to 20°C and Tg2 is set to 10°C. It should be noted that the specific values of Tg1 and Tg2 can be determined according to actual needs, and this embodiment does not make any limitation on them.

[0082] Optionally, in S222, when the processor determines the final adjustment requirement of the target indoor unit according to the exhaust superheat, the suction superheat, the average temperature, and the average opening degree, it further includes:

[0083] When the exhaust superheat is less than or equal to the first superheat threshold and greater than the third superheat threshold, and the suction superheat is less than or equal to the second superheat threshold and greater than the fourth superheat threshold, and the trachea temperature corresponding to the target indoor unit is less than the second temperature threshold, the processor determines that the target indoor unit does not need to be adjusted; where the second temperature threshold is related to the average temperature.

[0084] Set the third superheat threshold Tg3, the fourth superheat threshold Tg4, and the second temperature threshold T2.

[0085] If Tg3<Tpq≤Tg1, Tg4<Txq≤Tg2, and Tcm<T2 are satisfied simultaneously, where T2<T1, at this time, the trachea temperatures are all relatively low, indicating that the probability of uneven flow problem in the corresponding indoor unit is relatively low, then it is determined that the target indoor unit does not need to be adjusted. Optionally, Tg3 is set to 10°C and Tg4 is set to 5°C. It should be noted that the specific values of Tg3 and Tg4 can be determined according to actual needs, and this embodiment does not make any limitation on them.

[0086] Since one of the conditions for determining that the target indoor unit needs to be adjusted in the previous text is that LEVm > A2, that is, the opening degree of the indoor unit valve is relatively large. Here, when Tcm < T2 is satisfied, it indicates that the trachea temperature corresponding to the target indoor unit has decreased, that is, the corresponding indoor unit valve opening degree has been adjusted appropriately. Therefore, when determining that the target indoor unit does not need to be adjusted here, it is not necessary to judge the corresponding indoor unit valve opening degree anymore. In this way, both the computational workload of the processor can be reduced, and the indoor units that need to be adjusted can be accurately determined.

[0087] Optionally, in S222, the processor determines the final adjustment requirement of the target indoor unit according to the exhaust superheat degree, the suction superheat degree, the average temperature, and the average opening degree, and further includes:

[0088] The processor re-primarily determines the target indoor unit that needs to be adjusted when the exhaust superheat degree is less than or equal to the third superheat threshold, and / or the suction superheat degree is less than or equal to the fourth superheat threshold, and / or the trachea temperature corresponding to the target indoor unit is greater than or equal to the second temperature threshold.

[0089] If Tpq ≤ Tg3, and / or Txq ≤ Tg4, and / or Tcm ≥ T2 are satisfied, it indicates that the indoor unit valve has not been adjusted properly and the opening degree of the indoor unit valve is still too small, then S201 is re-executed, that is, the target indoor unit that needs to be adjusted is re-primarily determined.

[0090] Optionally, the first temperature threshold is determined by the following method:

[0091] The processor calculates the temperature average value of all trachea temperatures.

[0092] The processor takes the product of the temperature average value and the first coefficient as the first temperature threshold.

[0093] According to formula (1) in the previous text, the average value Tc of all trachea temperatures is calculated. T1 = a × Tc, where a is the first coefficient and is less than 1. This is because the risk of cross-flow is relatively low when the trachea temperature corresponding to the target indoor unit is lower than the average value of the trachea temperatures. Optionally, a takes a value of 10%. In this way, by adjusting the average value of all trachea temperatures with the first coefficient and taking the product of the two as one of the conditions for judging whether the target indoor unit needs to be adjusted, the accuracy of the judgment condition can be ensured.

[0094] Optionally, the second opening threshold is determined by the following method:

[0095] The processor calculates the average opening degree of all indoor unit valves.

[0096] The processor takes the product of the average opening degree and the second coefficient as the second opening threshold.

[0097] The average opening degree LEV of the indoor unit valve is calculated according to formula (2) above. A2 = b × LEV, where b is the second coefficient and is less than 1. This is because when the opening degree of the indoor unit valve corresponding to the target indoor unit is less than the average opening degree, the risk of uneven flow is relatively low. Optionally, b takes a value of 10%. In this way, by adjusting the average opening degree of all indoor unit valves with the second coefficient and using the product of the two as one of the conditions for judging whether to adjust the target indoor unit, the accuracy of the judgment condition can be ensured.

[0098] Optionally, the second temperature threshold is determined in the following manner:

[0099] The processor calculates the average temperature of all the tracheal temperatures.

[0100] The processor takes the product of the average temperature and the third coefficient as the second temperature threshold.

[0101] The average value Tc of all the tracheal temperatures is calculated according to formula (1) above. T2 = c × Tc, where c is the third coefficient and is less than 1, and c < a. This is because when the tracheal temperature corresponding to the target indoor unit is lower than the average tracheal temperature, the risk of uneven flow is relatively low. At the same time, the second temperature threshold is smaller than the first temperature threshold to more surely determine that the target indoor unit does not need to be adjusted. Optionally, c takes a value of 5%.

[0102] Optionally, if there are multiple target indoor units, the processor preferentially adjusts the target superheat degree of the indoor unit corresponding to the indoor unit valve with a larger opening degree. Specifically, it starts adjusting from the target indoor unit corresponding to the indoor unit valve with the largest opening degree until the adjustment of the target indoor unit corresponding to the indoor unit valve with the smallest opening degree is completed. In this way, the indoor unit with more serious uneven flow is preferentially adjusted to ensure the refrigeration effect of the corresponding indoor unit as soon as possible.

[0103] Optionally, in S203, the processor corrects the target superheat degree of the target indoor unit, including:

[0104] The processor makes a negative correction to the target superheat degree of the target indoor unit.

[0105] In order to improve the uneven flow problem of the target indoor unit, a negative correction is made to the target superheat degree of the target indoor unit, that is, the target superheat degree of the target indoor unit is reduced. Optionally, the reduction of the target superheat degree of the target indoor unit is achieved by controlling the opening degree of the indoor unit valve corresponding to the target indoor unit.

[0106] Optionally, the larger the difference between Tpq and Tg1, and / or the larger the difference between Txq and Tg2, and / or the larger the difference between Tcm and T1, and / or the larger the difference between LEVm and A2, it indicates that the uneven flow problem of the corresponding target indoor unit is more serious. Therefore, the negative adjustment amplitude of the target superheat degree is larger, that is, the target superheat degree is reduced more. Optionally, the adjustment amplitude takes values of -1°C, -2°C, -3°C.

[0107] After the target superheat adjustment is completed, after a second set duration, it is determined again whether Tpq>Tg1, Txq>Tg2, Tcm>T1, and LEVm>A2 are satisfied simultaneously. Optionally, the second set duration is 30 minutes.

[0108] In practical applications, taking the adjustment of one indoor unit as an example, see Figure 5 :

[0109] S501, after the air conditioning system runs stably, the processor obtains the exhaust superheat Tpq and suction superheat Txq of the outdoor unit, as well as data such as the opening degrees of all indoor unit valves and the temperatures of all gas pipes.

[0110] S502, the processor calculates the average opening degree LEV of all indoor unit valves and the average temperature Tc of all gas pipes.

[0111] S503, the processor preliminarily determines that there is a flow deviation in the m-th indoor unit, and the m-th indoor unit is the target indoor unit; among them, the gas pipe temperature and the indoor unit valve opening degree corresponding to the m-th indoor unit are Tcm and LEVm respectively.

[0112] S504, the processor determines whether Tpq>Tg1, Txq>Tg2, Tcm>T1, and LEVm>A2 are satisfied; if so, execute S505; if not, execute S506.

[0113] S505, the processor negatively corrects the target superheat of the m-th indoor unit; after running for the second set duration, execute S504 again.

[0114] S506, the processor determines whether Tpq>Tg3, Txq>Tg4, and Tcm<T2 are satisfied; if so, execute S507; if not, execute S502.

[0115] S507, the superheat adjustment of a single indoor unit in the air conditioning system is completed.

[0116] Combined with Figure 6 As shown, an apparatus 60 for controlling an air conditioning system provided by an embodiment of the present disclosure includes: a first determination module 61, a second determination module 62, and a correction module 63. The first determination module 61 is configured to preliminarily determine a target indoor unit that needs to be adjusted. The second determination module 62 is configured to determine the final adjustment requirement of the target indoor unit according to the superheat parameters of the outdoor unit of the air conditioning system, the gas pipe temperatures of each indoor unit, and the opening degrees of each indoor unit valve. The correction module 63 is configured to correct the target superheat of the target indoor unit when the target indoor unit finally needs to be adjusted.

[0117] By using the device 60 for controlling an air conditioning system provided in the embodiments of the present disclosure, first, the target indoor unit that needs to be adjusted is preliminarily confirmed, and the indoor unit with air flow deviation is roughly judged. Then, in combination with the superheat parameter of the outdoor unit, the trachea temperature and the indoor unit valve opening, the final adjustment requirement of the target indoor unit is determined, that is, the accurate judgment of the air flow deviation is carried out on the basis of the rough judgment. If the judgment result indicates that the target indoor unit needs to be adjusted, the target superheat of the target indoor unit is corrected. In this way, the target indoor unit that needs to be adjusted can be accurately determined, and by controlling the target superheat of the target indoor unit, the refrigeration effect of the indoor unit can be guaranteed.

[0118] In combination Figure 7 As shown, the embodiments of the present disclosure provide a device 70 for controlling an air conditioning system, including a processor 71 and a memory 72. Optionally, the device 70 may further include a communication interface 73 and a bus 74. Among them, the processor 71, the communication interface 73, and the memory 72 can complete communication with each other through the bus 74. The communication interface 73 can be used for information transmission. The processor 71 can call the logic instructions in the memory 72 to execute the method for controlling the air conditioning system in the above embodiments.

[0119] In addition, when the logic instructions in the above-mentioned memory 72 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0120] The memory 72, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 71 executes functional applications and data processing by running the program instructions / modules stored in the memory 72, that is, implements the method for controlling the air conditioning system in the above embodiments.

[0121] The memory 72 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 72 may include a high-speed random access memory and may also include a non-volatile memory.

[0122] In combination Figure 8As shown in the figure, an embodiment of the present disclosure provides an air conditioning system 80, including: a product body, and the above-mentioned device 60(70) for controlling the air conditioning system. The device 60(70) for controlling the air conditioning system is installed on the air conditioning system body. The installation relationship described here is not limited to being placed inside the air conditioning system body, but also includes installation connections with other components of the air conditioning system 80, including but not limited to physical connections, electrical connections, or signal transmission connections, etc. Those skilled in the art can understand that the device 60(70) for controlling the air conditioning system can be adapted to a feasible product body, thereby implementing other feasible embodiments.

[0123] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above-mentioned method for controlling an air conditioning system.

[0124] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0125] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and do not limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups of these. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, or apparatus including the element. Herein, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0126] Those skilled in the art will realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software can depend on the specific application and design constraints of the technical solution. The skilled person may use different methods for each specific application to achieve the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0127] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the shown or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms. The units described as separate components can be or can not be physically separated. The components shown as units can be or can not be physical units, that is, they can be located in one place or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit.

[0128] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the block can occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks can also occur in a different order than disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. Each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an air conditioning system, characterized in that, The air conditioning system includes multiple indoor units, and an indoor unit valve is correspondingly arranged for each indoor unit; the method includes: Preliminarily determine the target indoor unit that needs to be adjusted; Determine the final adjustment requirement of the target indoor unit according to the superheat parameter of the outdoor unit of the air conditioning system, the trachea temperature of each indoor unit, and the opening degree of each indoor unit valve; When the target indoor unit finally needs to be adjusted, correct the target superheat of the target indoor unit.

2. The method according to claim 1, wherein The preliminary determination of the target indoor unit that needs to be adjusted includes: Obtain the trachea temperature of each indoor unit and the opening degree of the corresponding indoor unit valve; Determine the indoor unit corresponding to the trachea with the highest temperature and the indoor unit valve with an opening degree greater than the first opening degree threshold as the target indoor unit.

3. The method according to claim 1 or 2, characterized in that, The superheat parameter of the outdoor unit includes: discharge superheat and suction superheat; determining the final adjustment requirement of the target indoor unit according to the superheat parameter of the outdoor unit of the air conditioning system, the trachea temperature of each indoor unit, and the opening degree of each indoor unit valve includes: Calculate the average temperature of the trachea temperatures of all the indoor units and the average opening degree of all the indoor unit valves; Determine the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree.

4. The method according to claim 3, characterized in that, The determining the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree includes: When the discharge superheat is greater than the first superheat threshold, the suction superheat is greater than the second superheat threshold, the trachea temperature of the target indoor unit is greater than the first temperature threshold, and the opening degree of the indoor unit valve corresponding to the target indoor unit is greater than the second opening degree threshold, determine that the target indoor unit needs to be adjusted; Wherein, the first temperature threshold is related to the average temperature; the second opening degree threshold is related to the average opening degree.

5. The method according to claim 3, characterized in that, The determining the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree includes: When the discharge superheat is less than or equal to the first superheat threshold and greater than the third superheat threshold, the suction superheat is less than or equal to the second superheat threshold and greater than the fourth superheat threshold, and the trachea temperature corresponding to the target indoor unit is less than the second temperature threshold, determine that the target indoor unit does not need to be adjusted; Wherein, the second temperature threshold is related to the average temperature.

6. The method according to claim 5, characterized in that, The determining the final adjustment requirement of the target indoor unit according to the discharge superheat, the suction superheat, the average temperature, and the average opening degree further includes: When the discharge superheat is less than or equal to the third superheat threshold, and / or, the suction superheat is less than or equal to the fourth superheat threshold, and / or, the trachea temperature corresponding to the target indoor unit is greater than or equal to the second temperature threshold, re-primarily determine the target indoor unit that needs to be adjusted.

7. The method according to claim 4, characterized in that, The second temperature threshold is determined by the following method: Calculate the average temperature of all the trachea temperatures; Take the product of the average temperature and the first coefficient as the first temperature threshold.

8. The method according to any one of claims 1 to 7, characterized in that, The correcting the target superheat of the target indoor unit includes: Negatively correct the target superheat degree of the target indoor unit.

9. A device for controlling an air conditioning system, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the method for controlling an air-conditioning system according to any one of claims 1 to 8 when running the program instructions.

10. An air conditioning system, characterized in that, Comprising: The air-conditioning system body; The device for controlling an air-conditioning system according to claim 9, installed on the air-conditioning system body.

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