Air conditioning unit and control method thereof

Abstract

The invention discloses an air conditioning unit and a control method thereof. The control method of the air conditioning unit comprises the steps that operation parameters of a unit system are obtained; according to the operation parameters, the operation frequency of a compressor of the unit system after a preset time period is predicted, and the predicted operation frequency of the compressor is obtained; and according to the predicted operation frequency, the shielding operation frequency of each of the other compressors except the compressor after a preset time period is determined, so that each of the other compressors operates according to other operation frequencies except the shielding operation frequency after the preset time period. According to the control method of the air conditioning unit, the problem of same-frequency resonance of the compressors of the multi-system air conditioning unit can be prevented, the operation reliability of the air conditioning unit is improved, and the service life of the air conditioning unit is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and particularly to an air conditioner unit and a control method thereof. Background Art

[0002] A variable-frequency air conditioner controls and adjusts the rotation frequency of a compressor through an inverter, so that the compressor is in a better operating state, thereby achieving the purpose of improving the energy efficiency ratio of the variable-frequency air conditioner. During the frequency modulation operation of a variable-frequency air conditioner unit, a resonance problem will occur, causing excessive vibration stress in its pipeline and prone to cracking and leakage, affecting the service life of the variable-frequency air conditioner unit. The variable-frequency air conditioner units in the related art shield the resonance points of the natural frequency of the unit during the operation of the air conditioner unit to avoid resonance caused by the operation of the variable-frequency air conditioner unit at the resonance points of the natural frequency. However, the variable-frequency air conditioner units in the related art still have a resonance problem during operation.

[0003] It is found by the inventor that the variable-frequency air conditioner units in the related art shield the natural frequency points of the variable-frequency air conditioner units, but resonance will also occur when the same frequency is run between the compressors of different unit systems, resulting in a reduction in the service life of the variable-frequency air conditioner units. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide an air conditioner unit and a control method thereof that can overcome or at least partially solve the above problems, which can solve the problem of synchronous resonance of compressors in a multi-system air conditioner unit to improve the service life of the air conditioner unit.

[0005] Specifically, the present invention provides a control method for an air conditioner unit. The air conditioner unit includes a plurality of unit systems, and each unit system includes a compressor. The control method includes:

[0006] Obtain the operating parameters of the unit system;

[0007] Predict the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor;

[0008] Determine the shielding operating frequency of each of the remaining compressors other than the compressor after a preset time period according to the predicted operating frequency, so that each of the remaining compressors operates at an operating frequency other than the shielding operating frequency after a preset time period.

[0009] In some embodiments, predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters includes:

[0010] Predict the operating parameters of the compressor within the preset time period according to the operating parameters to obtain predicted operating parameters;

[0011] Determine the predicted operating frequency based on the predicted operating parameters.

[0012] In some embodiments, predicting the operating parameters of the compressor within the preset time period according to the operating parameters to obtain predicted operating parameters includes:

[0013] Obtain the change rule information of the operating parameters according to the operating parameters;

[0014] Determine the predicted operating parameters based on the change rule information.

[0015] In some embodiments, the determining the predicted operating frequency based on the predicted operating parameters includes:

[0016] Determine whether the predicted operating parameters meet a preset condition;

[0017] If so, predict the operating frequency of the compressor based on a frequency adjustment strategy to obtain the predicted operating frequency; the frequency adjustment strategy is a strategy for adjusting the frequency of the compressor when the operating parameters meet the preset condition.

[0018] In some embodiments, the operating parameters include the current frequency of the unit system, the compressor load feedback parameter, and the compressor fault feedback parameter.

[0019] Preferably, the compressor fault feedback parameter includes at least one of the exhaust temperature parameter, the exhaust pressure parameter, and the compressor current parameter; the compressor load feedback parameter includes the return water temperature difference parameter and the return water temperature difference change rate parameter.

[0020] The predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters includes:

[0021] Predict the first operating parameter of the compressor within the preset time period according to the compressor load feedback parameter to obtain the first predicted operating frequency change amount of the compressor;

[0022] Predict the second operating parameter of the compressor within the preset time period according to the compressor fault feedback parameter to obtain the second predicted operating frequency change amount of the compressor;

[0023] Determine the predicted operating frequency based on the current frequency, the first predicted operating frequency change amount, and the second predicted operating frequency change amount.

[0024] In some embodiments, there are multiple operating parameters;

[0025] Determining the predicted operating frequency of the compressor after a preset time period according to the operating parameters includes:

[0026] Obtaining the operating frequency of the compressor to obtain the current operating frequency;

[0027] Predicting the operating frequency of the compressor after a preset time period according to each of the operating parameters to obtain a plurality of first prediction parameters;

[0028] Obtaining the relationship between the first prediction parameter and the current operating frequency;

[0029] If at least one of the first prediction parameters is less than the current operating frequency, determining the smallest of the first prediction parameters as the predicted operating parameter;

[0030] If all of the first prediction parameters are greater than or equal to the current operating frequency, determining the largest of the first prediction parameters as the predicted operating parameter.

[0031] In some embodiments, there are multiple operating parameters;

[0032] Determining the predicted operating frequency of the compressor after a preset time period according to the operating parameters includes:

[0033] Obtaining a frequency prediction adjustment strategy for predicting the operating frequency of the compressor according to each of the operating parameters, the frequency prediction adjustment strategy including a frequency action and a frequency change speed, and the frequency action including frequency increase, frequency decrease, and frequency remaining unchanged;

[0034] Judging whether the frequency actions are consistent;

[0035] If so, predicting the operating frequency of the compressor according to the frequency adjustment strategy with the largest frequency change speed to obtain the predicted operating frequency;

[0036] If not, predicting the operating frequency of the compressor according to the frequency adjustment strategy with a frequency action of decreasing and the largest frequency change speed to obtain the predicted operating frequency.

[0037] In some embodiments, there are multiple operating parameters;

[0038] Determining the predicted operating frequency of the compressor after a preset time period according to the operating parameters includes:

[0039] Obtain a frequency adjustment strategy for predicting the operating frequency of the compressor according to each of the operating parameters. The frequency adjustment strategy includes a frequency action and a frequency change speed. The frequency action includes frequency increase and frequency decrease;

[0040] When multiple obtained frequency adjustment strategies exist, determine whether the frequency actions are consistent;

[0041] If so, predict the operating frequency of the compressor according to the frequency adjustment strategy with the maximum frequency change speed to obtain the predicted operating frequency;

[0042] If not, predict the operating frequency of the compressor according to the frequency adjustment strategy with a frequency action of decreasing and the maximum frequency change speed to obtain the predicted operating frequency.

[0043] In some embodiments, the shielded operating frequency is F and the predicted operating frequency is f, then the predicted operating frequency F is:

[0044] F = nf, where n is a positive integer.

[0045] On the other hand, the present invention also provides an air conditioner unit, which is characterized by including a controller. The controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor. When the processor executes the machine-executable program, the control method described in any one of the above is implemented.

[0046] The control method of the air conditioner unit according to the embodiment of the present invention predicts the operating frequency of the compressor of each unit system after a preset time period by collecting the operating parameters of each unit system, and determines the shielded operating frequency of the remaining unit systems according to the predicted operating frequency, thereby preventing the compressors of multiple unit systems from generating resonance, thus improving the operating reliability of the air conditioner unit and extending the service life of the air conditioner unit.

[0047] According to the following detailed description of specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will become more clear about the above and other objects, advantages, and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Hereinafter, some specific embodiments of the present invention will be described in detail with reference to the drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0049] Figure 1 is a schematic flowchart of a control method for an air conditioner unit according to an embodiment of the present invention;

[0050] Figure 2 is a schematic flowchart of an air conditioner unit control method according to an embodiment of the present invention;

[0051] Figure 3 is a schematic flowchart of an air conditioner unit control method according to an embodiment of the present invention;

[0052] Figure 4 is a schematic flowchart of an air conditioner unit control method according to an embodiment of the present invention;

[0053] Figure 5 is a schematic flowchart of an air conditioner unit control method according to an embodiment of the present invention;

[0054] Figure 6 is a schematic flowchart of an air conditioner unit control method according to an embodiment of the present invention;

[0055] Figure 7 is a simulated curve graph of the exhaust gas temperature parameter of the unit system according to an embodiment of the present invention;

[0056] Figure 8 is according to Figure 7 the simulated curve graph of the compressor frequency parameter predicted by the exhaust gas temperature parameter in;

[0057] Figure 9 is a simulated curve graph of the load feedback parameter of the unit system according to an embodiment of the present invention;

[0058] Figure 10 is according to Figure 9 the simulated curve graph of the compressor frequency change parameter predicted by the load feedback parameter in;

[0059] Figure 11 is a schematic structural diagram of a machine-readable storage medium according to an embodiment of the present invention;

[0060] Figure 12 is a schematic structural diagram of an air conditioner unit according to an embodiment of the present invention. Detailed implementation manners

[0061] Next, refer to Figures 1 to 12To describe the air conditioner unit and its control method according to embodiments of the present invention. In the description of the embodiments of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0062] Unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0063] In addition, in the description of the embodiments of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. That is, in the description of the embodiments of the present invention, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", or "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0064] In the description of the embodiments of the present invention, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0065] The variable-frequency air-conditioning unit according to an embodiment of the present invention includes a plurality of unit systems, and each unit system includes a compressor. When the variable-frequency air-conditioning unit operates, the operating frequency of each compressor changes with the change of the working conditions. And according to different operating parameters of each compressor, for example, the exhaust temperature parameter, the exhaust pressure parameter, and the compressor current parameter, the operating frequency action and the frequency change speed of each compressor during operation may also be different. For example, the operating frequencies of some compressors are in an increasing state, and the operating frequencies of another part of the compressors are in a decreasing state. Therefore, it is impossible to directly determine the operating frequency of each compressor in a future period of time so that the remaining compressors of the variable-frequency air-conditioning unit operate by shielding the operating frequency of this compressor. Thus, the embodiment of the present invention provides a control method for an air-conditioning unit.

[0066] The following describes the control method for the air-conditioning unit according to the embodiment of the present invention with reference to the accompanying drawings.

[0067] As Figures 1 - 4 shown, the control method for the air-conditioning unit according to the embodiment of the present invention includes the following steps:

[0068] S100. Obtain the operating parameters of the unit system. The operating parameters are data reflecting the operating state of the unit system. For example, the current operating frequency, the exhaust temperature, and the return water temperature difference of the unit system.

[0069] S200. Predict the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor.

[0070] When the unit system operates, the compressor in the unit system adjusts its operating frequency according to the operating parameters, thereby adjusting the operating state of the unit system to make the unit system operate better. For example, when the exhaust temperature exceeds the preset temperature value, in order to avoid affecting the normal operation of the unit system, the compressor performs a frequency reduction action, that is, the operating frequency of the compressor decreases to make the exhaust temperature drop.

[0071] Since the unit system adjusts the operating frequency of the compressor of the unit system according to the operating parameters, and predicts the operating frequency of the compressor of the unit system in a future time period according to the operating parameters of the unit system, the obtained predicted operating frequency data has reliability and accuracy.

[0072] S300. Determine the shielding operating frequency of each of the remaining compressors except this compressor after a preset time period according to the predicted operating frequency, so that each of the remaining compressors operates at other operating frequencies except the shielding operating frequency after the preset time period.

[0073] Wherein, the shielding operating frequency is F, and the predicted operating frequency is f, then the predicted operating frequency F is:

[0074] F = nf, where n is a positive integer;

[0075] It can be understood that when the remaining compressors operate at an integer multiple of the operating frequency value of the compressor in this unit system, resonance will occur between the remaining compressors and this compressor. For example, when the operating frequency of this compressor is 60HZ and the operating frequencies of the remaining compressors are 60HZ and 120HZ, resonance will occur between the remaining compressors and this compressor. In order to be able to comprehensively shield the resonance frequency points of this compressor, all frequency points that are integer multiples of the predicted operating frequency are shielded. Among them, shielding the resonance frequency points of this compressor means that this compressor operates at a frequency outside the resonance frequency points.

[0076] Preferably, according to the frequency operating range of the compressor, the shielded operating frequencies include f, 2f, and 3f. This reduces the number of resonance frequency points that the compressor needs to shield, thereby simplifying the execution process of the control method for the air-conditioning unit in the embodiment of the present invention.

[0077] Taking the example that the air-conditioning unit includes two unit systems, the control method for the air-conditioning unit in the embodiment of the present invention is further described with reference to the accompanying drawings.

[0078] Obtain the first operating parameter of the first unit system; simultaneously obtain the second operating parameter of the second unit system.

[0079] Predict the operating frequency of the first compressor of the first unit system after a preset time period according to the first operating parameter to obtain the predicted operating frequency of the first compressor; predict the operating frequency of the second compressor of the second unit system after a preset time period according to the second operating parameter to obtain the predicted operating frequency of the second compressor.

[0080] Determine the first shielded operating frequency of the second compressor after a preset time period according to the predicted operating frequency of the first compressor, so that the second compressor operates at an operating frequency other than the first shielded operating frequency after the preset time period; determine the second shielded operating frequency of the first compressor after a preset time period according to the predicted operating frequency of the second compressor, so that the first compressor operates at an operating frequency other than the second shielded operating frequency after the preset time period.

[0081] The control method for the air-conditioning unit in the embodiment of the present invention predicts the operating frequency of the compressor in this unit system after a preset time period by collecting the operating parameters of each unit system, and determines the shielded operating frequencies of the remaining unit systems according to the predicted operating frequencies, thereby preventing resonance of the compressors of multiple unit systems, so as to improve the operating reliability of the air-conditioning unit and extend the service life of the air-conditioning unit.

[0082] Such as Figure 2As shown, in some embodiments, step S200 of predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters includes the following steps:

[0083] S210. Predict the operating parameters of the compressor within a preset time period according to the operating parameters to obtain predicted operating parameters.

[0084] S220. Determine the predicted operating frequency based on the predicted operating parameters.

[0085] In other words, after obtaining the current operating parameters of a unit system, analyze the operating parameter data to predict the operating parameters of the unit system within a preset time period. Predict the operating frequency of the compressor of the unit system based on the predicted operating parameters to obtain the predicted operating frequency.

[0086] First, predict the operating parameters of the unit system within a preset time period according to the current operating parameters of the unit system, and then analyze the predicted operating parameter data to obtain the predicted operating frequency. Thus, the predicted operating frequency is determined according to the operating parameter data, making the predicted operating frequency more in line with the actual operating change trend of the unit system within the preset time period, and therefore further improving the reliability and accuracy of the predicted operating frequency data.

[0087] In some embodiments, as Figure 2 shown, step S210 of predicting the operating parameters of the compressor within a preset time period according to the operating parameters to obtain predicted operating parameters includes:

[0088] S211. Obtain the change rule information of the operating parameters according to the operating parameters.

[0089] S212. Determine the predicted operating parameters based on the change rule information.

[0090] Specifically, as Figures 7 - 10 shown, draw a curve simulation diagram of the change of the operating parameters of the unit system according to the current operating parameters of the unit system. Obtain the change rule information of the operating parameters through the curve simulation diagram of the change of the operating parameters, and draw a change diagram of the operating frequency data of the unit system within a preset time period based on the change rule information of the operating parameters to obtain the predicted operating data.

[0091] Predict the operating parameters of the unit system within a preset time period based on the change rule information of the current operating parameters of the unit system, making the predicted operating frequency more in line with the actual operating change trend of the unit system within the preset time period, and therefore further improving the reliability and accuracy of the predicted operating frequency data.

[0092] Among them, the current operating parameters of the unit system can be the operating parameters within a time period before the current time point.

[0093] For example Figure 7 and Figure 8 as shown Figure 7 shows the change trend and change amount of the exhaust gas temperature of the unit system with the change of the operating time of the unit system. Among them, the x-axis represents the operating time of the unit system, and the y-axis represents the exhaust gas temperature of the unit system. Figure 8 shows the change trend and change amount of the compressor frequency of the unit system with the change of the operating time of the unit system. Among them, the x-axis represents the operating time of the unit system, and the y-axis represents the frequency of the compressor.

[0094] According to the change law of the exhaust gas temperature parameters in the time period before time point t1, predict the change law of the exhaust gas temperature parameters in the time period between t1 and t4, draw a change diagram of the operating frequency data in the time period between t1 and t4 based on the change law of the exhaust gas temperature parameters in the time period between t1 and t4, and obtain the change trend and change amount of the operating frequency of the compressor in the time period between t1 and t4 based on the change diagram of the operating frequency data, so as to determine the predicted operating frequency after t4.

[0095] In some embodiments, as Figure 4 shown, step S220, determining the predicted operating frequency based on the predicted operating parameters, includes the following steps:

[0096] S221. Determine whether the predicted operating parameters meet the preset conditions.

[0097] S222. If so, predict the operating frequency of the compressor based on the frequency adjustment strategy to obtain the predicted operating frequency; the frequency adjustment strategy is a strategy for adjusting the frequency of the compressor when the operating parameters meet the preset conditions. Among them, the frequency adjustment strategy includes frequency action and frequency change speed, and the frequency action includes frequency increase and frequency decrease.

[0098] S223. If not, predict the operating frequency of the compressor based on the change law information of the operating parameters to obtain the predicted operating frequency.

[0099] It can be understood that during the actual operation of the unit system, when the operating parameters of the unit system meet the preset conditions, the operating frequency of the compressor of the unit system will be adjusted to make the unit system in a better operating state. For example, when the exhaust gas temperature of the unit system exceeds T1, the compressor of the unit system is controlled to reduce the frequency.

[0100] To make the reliability and accuracy of the predicted operating frequency better, when the predicted operating parameters meet the preset conditions, the frequency action of the compressor and the frequency change speed corresponding to the frequency action are adjusted. When the predicted operating parameters do not meet the preset conditions, the frequency action of the compressor and the frequency change speed corresponding to the frequency action are maintained, so that the predicted operating frequency more conforms to the actual operating conditions of the compressor.

[0101] For example Figure 7 and Figure 8 As shown, at t2, the predicted exhaust temperature of the unit system is greater than or equal to T1, that is, the preset condition is that the exhaust temperature is greater than or equal to T1. Then, the operating frequency after t2 is predicted with a frequency adjustment strategy where the frequency change speed of the compressor is 3Hz / 2s and the frequency action is frequency reduction. After t3, the predicted exhaust temperature drops to less than T1, and the predicted operating parameters do not meet the preset conditions. At this time, the predicted operating frequency drops to f2. Then, according to the change law of the exhaust temperature operating parameters, when the exhaust temperature is less than T1 after t3, the operating frequency after t3 is maintained at f2, that is, the operating frequency of the compressor remains unchanged in the frequency adjustment strategy.

[0102] In some embodiments, the operating parameters include the current frequency of the unit system, the compressor load feedback parameter, and the compressor fault feedback parameter.

[0103] Among them, the compressor fault feedback parameter includes at least one of the exhaust temperature parameter, the exhaust pressure parameter, and the compressor current parameter.

[0104] In other words, the compressor fault feedback parameter includes the exhaust temperature parameter; or, the compressor fault feedback parameter includes the exhaust pressure parameter; or, the compressor fault feedback parameter includes the compressor current parameter; or, the compressor fault feedback parameter includes the exhaust temperature parameter and the exhaust pressure parameter; or, the compressor fault feedback parameter includes the exhaust pressure parameter and the compressor current parameter; or, the compressor fault feedback parameter includes the exhaust temperature parameter and the compressor current parameter; or, the compressor fault feedback parameter includes the exhaust temperature parameter, the exhaust pressure parameter, and the compressor current parameter.

[0105] Step S200, predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters, includes the following steps:

[0106] S201. Predict the first operating parameter of the compressor within a preset time period according to the compressor load feedback parameter to obtain the first predicted operating frequency change amount of the compressor.

[0107] Among them, the compressor load feedback parameter includes the return water temperature difference parameter and the return water temperature difference change rate parameter.

[0108] Table 1 Operating Frequency Adjustment Table of Compressor

[0109]

[0110] Among them, Table 1 shows the corresponding relationship between the load feedback parameters and the frequency regulation of the compressor. Among them, the return water temperature difference ΔTcw1 = the return water temperature Twi1 - the set value of the return water temperature Twid. That is, the return water temperature difference is equal to the difference between the return water temperature and the set value of the return water temperature. The change rate of the return water temperature difference ΔTcw10 = the current return water temperature difference ΔTcw1 - the previous return water temperature ΔTcw0.

[0111] For example Figure 9 As shown, the value range of ΔTcw10 within the preset time period is greater than 0 and less than 1, and the return water temperature difference ΔTcw1 is greater than 1, then it is predicted that the compressor will increase its frequency at a rate of 1 HZ / s within the preset time period, so as to obtain the first predicted change amount of the operating frequency.

[0112] It should be noted that the frequency increase change amount of the compressor being 1 HZ / s is exemplary, and the frequency increase or decrease change amount of the compressor needs to be determined according to the specific working conditions of the unit system, and is not limited here.

[0113] S202. Predict the second operating parameter of the compressor within the preset time period according to the compressor fault feedback parameter, and obtain the second predicted change amount of the operating frequency of the compressor.

[0114] Specifically, predict the second operating parameter of the compressor within the preset time period according to the compressor fault feedback parameter to obtain the predicted operating parameter, and determine the second predicted change amount of the operating frequency based on the predicted operating parameter.

[0115] S203. Determine the predicted operating frequency based on the current frequency, the first predicted change amount of the operating frequency, and the second predicted change amount of the operating frequency.

[0116] In other words, the predicted operating frequency f is:

[0117] f = f in + △f1 + △f2,

[0118] Among them, f in is the current frequency, △f1 is the first predicted change amount of the operating frequency, and △f2 is the second predicted change amount of the operating frequency.

[0119] In some embodiments, as Figure 6 shown, there are multiple operating parameters. In step S200, predicting the operating frequency of the compressor of the unit system after the preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor further includes the following steps:

[0120] S21. Obtain the operating frequency of the compressor to obtain the current operating frequency.

[0121] S22. Predict the operating frequency of the compressor after a preset time period according to each operating parameter to obtain a plurality of first prediction parameters.

[0122] That is, predict the operating frequency data of the compressor after a preset time period according to each operating parameter, namely the first prediction parameter. Multiple operating parameters correspond to predicting multiple first prediction parameters. For example, three groups of first prediction parameters can be predicted respectively according to the exhaust gas temperature parameter, the exhaust gas pressure parameter and the compressor current parameter.

[0123] S23. Obtain the relationship between the first prediction parameter and the current operating frequency.

[0124] If at least one first prediction parameter is less than the current operating frequency, determine the smallest first prediction parameter as the predicted operating parameter. If all the first prediction parameters are greater than or equal to the current operating frequency, determine the largest first prediction parameter as the predicted operating parameter.

[0125] In other words, for the multiple groups of first prediction parameters predicted by multiple groups of operating parameters, some of the first prediction parameters include frequency increase actions and some of the first prediction parameters include frequency decrease actions, then determine the first prediction parameter containing the frequency decrease action instruction as the predicted operating parameter. And when the frequency change speeds of the multiple groups of first prediction parameters are different, determine the one with the largest frequency change speed among the multiple groups of first prediction parameters as the predicted operating parameter. When there are multiple predicted first prediction parameters, determine one first prediction parameter as the predicted operating parameter to avoid conflicts when the multiple groups of first prediction parameters are executed, making the control program of this embodiment simple and easy to execute.

[0126] In some other embodiments, there are multiple operating parameters. Step S200, predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor, further includes the following steps:

[0127] Obtain a frequency prediction adjustment strategy for predicting the operating frequency of the compressor according to each operating parameter. The frequency prediction adjustment strategy includes a frequency action and a frequency change speed. The frequency action includes frequency increase, frequency decrease and frequency remaining unchanged.

[0128] Judge whether the frequency actions are consistent. If so, predict the operating frequency of the compressor according to the frequency adjustment strategy with the largest frequency change speed to obtain the predicted operating frequency; if not, predict the operating frequency of the compressor according to the frequency adjustment strategy with a downward frequency action and the largest frequency change speed to obtain the predicted operating frequency.

[0129] In other words, for multiple sets of frequency prediction and adjustment strategies obtained through prediction of multiple sets of operating parameters, some of the frequency prediction and adjustment strategies include frequency increase actions, and some of the frequency prediction and adjustment strategies include frequency decrease actions. Then, the predicted operating parameters are predicted according to the frequency prediction and adjustment strategy including the frequency decrease action instruction. And when the frequency change speeds of multiple sets of frequency prediction and adjustment strategies are different, the one with the maximum frequency change speed among the multiple sets of frequency prediction and adjustment strategies is used for predicting the operating parameters. When there are multiple predicted frequency prediction and adjustment strategies, the frequency prediction and adjustment strategy is first determined, and then the predicted operating parameters are predicted according to this frequency prediction and adjustment strategy, making the control program of this embodiment simple and easy to execute.

[0130] In still some other embodiments, there are multiple operating parameters. In step S200, the operating frequency of the compressor of the unit system after a preset time period is predicted according to the operating parameters to obtain the predicted operating frequency of the compressor, and the method further includes the following steps:

[0131] A frequency adjustment strategy for predicting the operating frequency of the compressor is obtained according to each operating parameter. The frequency adjustment strategy includes a frequency action and a frequency change speed, and the frequency action includes frequency increase and frequency decrease.

[0132] When multiple obtained frequency adjustment strategies are available, it is determined whether the frequency actions are consistent. If so, the operating frequency of the compressor is predicted according to the frequency adjustment strategy with the maximum frequency change speed to obtain the predicted operating frequency; if not, the operating frequency of the compressor is predicted according to the frequency adjustment strategy with a downward frequency action and the maximum frequency change speed to obtain the predicted operating frequency.

[0133] That is to say, the frequency adjustment strategy does not include a frequency operation action of keeping the frequency unchanged. If it is predicted according to a certain operating parameter that the frequency of the compressor remains unchanged within the preset time period, this prediction information does not conform to the frequency adjustment strategy, and this prediction information is not called when obtaining the frequency adjustment strategy. Thereby, the execution process of the control program is further simplified.

[0134] Figure 11 It is a schematic diagram of a machine-readable storage medium 200 according to an embodiment of the present invention. As Figure 11 shown, an embodiment of the present invention further provides a machine-readable storage medium 200, on which a machine-executable program 201 is stored. When the machine-executable program 201 is executed by a processor 132, it implements the control method of the air conditioner unit 100 according to any one of the above embodiments.

[0135] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a defined sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any machine-readable storage medium 200 for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor 132, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in combination with these instruction execution systems, apparatus, or devices.

[0136] For the description of this embodiment, the machine-readable storage medium 200 can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device or in combination with these instruction execution systems, apparatus, or devices. More specific examples (non-exhaustive list) of the machine-readable storage medium 200 include the following: an electrical connection part with one or more wirings (electronic device), a portable computer disk cartridge (magnetic device), a random access memory 131 (RAM), a read-only memory 131 (ROM), an erasable programmable read-only memory 131 (EPROM or flash memory 131), an optical fiber device, and a portable compact disc read-only memory 131 (CDROM). Additionally, the machine-readable storage medium 200 can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other suitable processing as necessary, and then stored in the memory 131.

[0137] Figure 12 is a schematic diagram of an air-conditioning unit 100 according to an embodiment of the present invention, as Figure 12 shown, an embodiment of the present invention also provides an air-conditioning unit 100, and the air-conditioning unit 100 includes a controller 130. The controller 130 includes a memory 131, a processor 132, and a machine-executable program 201 stored on the memory 131 and running on the processor 132. When the processor 132 executes the machine-executable program 201, it implements the control method of the air-conditioning unit according to any one of the above embodiments.

[0138] The air-conditioning unit 100 further includes a temperature detection module, a compressor current detection module, and a pressure detection module. Among them, the temperature detection module is used to detect the exhaust temperature, return water temperature difference, and return water temperature difference change rate of the unit system, and transmit the detected temperature parameter data to the controller 130. The compressor current detection module is used to detect the compressor current of the unit system and transmit the detected compressor current parameter data to the controller 130. The pressure detection module is used to detect the exhaust pressure of the unit system and transmit the detected pressure parameter data to the controller 130.

[0139] The controller 130 may include a processor 132 adapted to execute stored instructions and a memory 131 that provides temporary storage space for the operation of the instructions during operation. The processor 132 may be a single-core processor 132, a multi-core processor 132, a computing cluster, or any number of other configurations. The memory 131 may include random access memory 131 (RAM), read-only memory 131, flash memory, or any other suitable storage system.

[0140] The processor 132 may be connected through a system interconnect (such as PCI, PCI-Express, etc.) to an I / O interface (input / output interface) adapted to connect the air conditioner unit 100 to one or more I / O devices (input / output devices). The I / O devices may include, for example, a keyboard and a pointing device, where the pointing device may include a touchpad or a touch screen, etc.

[0141] The processor 132 may also be linked through a system interconnect to a display interface adapted to connect the controller 130 to a display device. The display device may include a display screen as a built-in component of the controller 130. The display device may also include a computer monitor, a television set, a projector, etc. externally connected to the air conditioner unit 100. In addition, a network interface controller (NIC) may be adapted to connect the controller 130 to a network through a system interconnect. In some embodiments, the NIC may use any suitable interface or protocol (such as Internet Small Computer System Interface, etc.) to transmit data. The network may be a cellular network, a radio network, a wide area network (WAN), a local area network (LAN), or the Internet, etc. A remote device may be connected to the controller 130 through the network.

[0142] At this point, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all such other variations or modifications.

Claims

1. A control method for an air-conditioning unit, characterized in that, The air conditioner unit includes a plurality of unit systems, each unit system includes a compressor, and the control method includes: Obtain the operating parameters of the unit system; Predict the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor; Determine the blocked operating frequency of each of the remaining compressors other than the compressor after a preset time period according to the predicted operating frequency, so that each of the remaining compressors operates at an operating frequency other than the blocked operating frequency after the preset time period.

2. The control method of the air conditioning unit according to claim 1, characterized in that, Predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters includes: Predict the operating parameters of the compressor within the preset time period according to the operating parameters to obtain predicted operating parameters; Determine the predicted operating frequency based on the predicted operating parameters.

3. The control method of the air conditioning unit according to claim 2, wherein Predicting the operating parameters of the compressor within the preset time period according to the operating parameters to obtain predicted operating parameters includes: Obtain the change rule information of the operating parameters according to the operating parameters; Determine the predicted operating parameters based on the change rule information.

4. The control method of the air conditioning unit according to claim 2, characterized in that, The determining the predicted operating frequency based on the predicted operating parameters includes: Judge whether the predicted operating parameters meet the preset conditions; If so, predict the operating frequency of the compressor based on the frequency adjustment strategy to obtain the predicted operating frequency; the frequency adjustment strategy is a strategy for adjusting the frequency of the compressor when the operating parameters meet the preset conditions, wherein the frequency adjustment strategy includes a frequency action and a frequency change speed, and the frequency action includes frequency increase and frequency decrease.

5. The control method of the air-conditioning unit according to claim 1, characterized in that, The operating parameters include the current frequency of the unit system, a compressor load feedback parameter, and a compressor fault feedback parameter. Preferably, the compressor fault feedback parameter includes at least one of an exhaust temperature parameter, an exhaust pressure parameter, and a compressor current parameter; the compressor load feedback parameter includes a return water temperature difference parameter and a return water temperature difference change rate parameter. Predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters includes: Predict the first operating parameter of the compressor within the preset time period according to the compressor load feedback parameter to obtain the first predicted operating frequency change amount of the compressor; Predict the second operating parameter of the compressor within the preset time period according to the compressor fault feedback parameter to obtain the second predicted operating frequency change amount of the compressor; Determine the predicted operating frequency based on the current frequency, the first predicted operating frequency change amount, and the second predicted operating frequency change amount.

6. The control method of the air conditioner unit according to claim 1, wherein The operating parameters are multiple; Predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor includes: Obtain the operating frequency of the compressor to obtain the current operating frequency; Predict the operating frequency of the compressor after a preset time period according to each of the operating parameters to obtain a plurality of first prediction parameters; Obtain the relationship between the first prediction parameter and the current operating frequency; If at least one of the first prediction parameters is less than the current operating frequency, determine the smallest first prediction parameter as the predicted operating parameter; If all of the first prediction parameters are greater than or equal to the current operating frequency, determine the largest first prediction parameter as the predicted operating parameter.

7. The control method of the air conditioner unit according to claim 1, wherein There are multiple operating parameters; The predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor includes: Obtain a frequency prediction adjustment strategy for predicting the operating frequency of the compressor according to each operating parameter, the frequency prediction adjustment strategy includes a frequency action and a frequency change speed, and the frequency action includes frequency increase, frequency decrease, and frequency remaining unchanged; Judge whether the frequency actions are consistent; If so, predict the operating frequency of the compressor according to the frequency adjustment strategy with the largest frequency change speed to obtain the predicted operating frequency; If not, predict the operating frequency of the compressor according to the frequency adjustment strategy with a downward frequency action and the largest frequency change speed to obtain the predicted operating frequency.

8. The control method of the air conditioner unit according to claim 1, wherein There are multiple operating parameters; The predicting the operating frequency of the compressor of the unit system after a preset time period according to the operating parameters to obtain the predicted operating frequency of the compressor includes: Obtain a frequency adjustment strategy for predicting the operating frequency of the compressor according to each operating parameter, the frequency adjustment strategy includes a frequency action and a frequency change speed, and the frequency action includes frequency increase and frequency decrease; When multiple frequency adjustment strategies are obtained, judge whether the frequency actions are consistent; If so, predict the operating frequency of the compressor according to the frequency adjustment strategy with the largest frequency change speed to obtain the predicted operating frequency; If not, predict the operating frequency of the compressor according to the frequency adjustment strategy with a downward frequency action and the largest frequency change speed to obtain the predicted operating frequency.

9. The control method of the air-conditioning unit according to claim 1, wherein If the blocked operating frequency is F and the predicted operating frequency is f, then the predicted operating frequency F is: F = nf, where n is a positive integer.

10. An air-conditioning unit, characterized in that, It includes a controller, the controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor, and when the processor executes the machine-executable program, the control method according to any one of claims 1 to 9 is implemented.

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