Compressor frequency control method, apparatus, device, and storage medium

Abstract

The present application relates to the field of electromechanical control, and discloses a compressor frequency control method, device, equipment and storage medium, which are used for improving operation efficiency.The compressor frequency control method comprises the following steps: obtaining a first compressor set, wherein the compressors in the first compressor set are compressors in an operation state; obtaining the working frequency of each compressor in the first compressor set; calculating an average frequency according to the working frequency of each compressor; determining a target operation strategy according to the average frequency, wherein the target operation strategy is an increase compressor strategy or a decrease compressor strategy; adjusting the first compressor set according to the target operation strategy to obtain a second compressor set; and adjusting the working frequency of each compressor in the second compressor set.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromechanical control, and in particular to a compressor frequency control method, device, equipment and storage medium. BACKGROUND

[0002] With the continuous development of heat pump air conditioning technology, direct current frequency conversion technology is more and more popular in the market. Among them, large space areas such as sports stadiums and shopping malls use commercial module machines for air conditioning. Due to the limited displacement of closed scroll compressors, commercial module machines use multiple compressors in parallel. Due to the size limitation of the module machine, the number of compressors in a commercial module machine is limited. In order to ensure the air conditioning effect, multiple commercial module machines are set up in large space areas.

[0003] The existing multi-system control scheme basically controls the start and stop of the module machine as a whole. In the frequency conversion system, the operation of the compressor has a standard operating frequency range, and the operating efficiency is higher within this range. However, controlling the module machine as a whole will most likely cause the compressors to operate at a frequency outside the standard operating frequency range, resulting in low operating efficiency. SUMMARY

[0004] The main purpose of the present application is to provide a compressor frequency control method, device, equipment and storage medium, which is used to solve the problem that the operating frequency of the compressor system is not within the standard operating frequency range, and improve the operating efficiency.

[0005] The first aspect of the present application provides a compressor frequency control method, comprising: obtaining a first compressor set, the compressors in the first compressor set being compressors in an operating state; obtaining the operating frequency of each compressor in the first compressor set, and calculating the average frequency according to the operating frequency of each compressor; determining a target operating strategy according to the average frequency, the target operating strategy being an increase compressor strategy or a decrease compressor strategy; adjusting the first compressor set according to the target operating strategy to obtain a second compressor set; and adjusting the operating frequency of each compressor in the second compressor set.

[0006] In a possible implementation, the target operating strategy is determined according to the average frequency, comprising: judging whether the average frequency is greater than a maximum preset frequency or less than a minimum preset frequency; when the average frequency is greater than the maximum preset frequency, judging whether there is a non-started compressor; if yes, judging whether the duration of the average frequency is greater than a first time threshold; if yes, determining the increase compressor strategy as the target operating strategy; when the average frequency is less than the minimum preset frequency, judging whether the duration of the average frequency is greater than a second time threshold; if yes, determining the decrease compressor strategy as the target operating strategy.

[0007] In an implementation, the adjusting the first set of compressors according to the target operation strategy to obtain a second set of compressors comprises: counting the number of compressors in the first set of compressors to obtain a first number; when the target operation strategy is an increase-compressor strategy, calculating according to the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and a first preset formula to obtain a second number, the first preset formula being:

[0008]

[0009] wherein m is the second number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the second number is the number of compressors to be started, and G(θ) is a rounding function, G(θ) = 1 when θ < 1, and G(θ) outputs a positive integer obtained by rounding θ when θ ≥ 1; at least one compressor is selected from the non-started compressors to be started until the number of newly started compressors is equal to the second number or all the non-started compressors are started, and the newly started compressors and the compressors in the first set of compressors are aggregated to obtain the second set of compressors.

[0010] In an implementation, the adjusting the working frequency of each compressor in the second set of compressors comprises: calculating according to the first number, the average frequency, the second number, and a second preset formula to obtain a first frequency, the second preset formula being:

[0011]

[0012] wherein f1 is the first frequency, x is the first number, y is the average frequency, and m is the second number; and the first frequency is determined as the working frequency of each compressor in the second set of compressors.

[0013] In an implementation, the adjusting the first set of compressors according to the target operation strategy to obtain a second set of compressors comprises: counting the number of compressors in the first set of compressors to obtain a first number; when the target operation strategy is a decrease-compressor strategy, calculating according to the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and a third preset formula to obtain a third number, the third preset formula being:

[0014]

[0015] Wherein, n is the third quantity, x is the first quantity, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the third quantity is the number of compressors to be closed, G(θ) is an integer function, when θ<1, G(θ)=1, when θ≥1, the integer function is used to output a positive integer after θ is rounded; at least one compressor is selected from the first compressor set to be closed until the number of closed compressors is equal to the third quantity or all compressors in the first compressor set are closed, and the closed compressors in the first compressor set are deleted to obtain a second compressor set.

[0016] In a feasible implementation, the adjusting the working frequency of each compressor in the second compressor set comprises: when the second compressor set is not empty, calculating according to the first quantity, the average frequency, the third quantity and a fourth preset formula to obtain a second frequency, the fourth preset formula is:

[0017]

[0018] Wherein, f2 is the second frequency, x is the first quantity, y is the average frequency, n is the third quantity; the second frequency is determined as the working frequency of each compressor in the second compressor set; when the second compressor set is empty, the working frequency of each compressor in the first compressor set is set to 0.

[0019] In a feasible implementation, after the adjusting the working frequency of each compressor in the second compressor set, further comprising: monitoring the actual time length of each compressor in the second compressor set running at the updated working frequency; when the actual time length is greater than a third time threshold, detecting the change rate of the outlet water temperature; calculating an initial working frequency according to the change rate of the outlet water temperature; determining the initial working frequency as the working frequency of each compressor in the second compressor set.

[0020] The second aspect of the application provides a compressor frequency control device, comprising: an acquisition module for acquiring a first compressor set, the compressors in the first compressor set being in a running state; a calculation module for acquiring the working frequency of each compressor in the first compressor set and calculating an average frequency according to the working frequency of each compressor; a determination module for determining a target running strategy according to the average frequency, the target running strategy being an increase compressor strategy or a decrease compressor strategy; a first adjustment module for adjusting the first compressor set according to the target running strategy to obtain a second compressor set; and a second adjustment module for adjusting the working frequency of each compressor in the second compressor set.

[0021] In an implementation, the determining module is configured to: determine whether the average frequency is greater than a maximum preset frequency or less than a minimum preset frequency; when the average frequency is greater than the maximum preset frequency, determine whether there is a non-started compressor; if yes, determine whether a duration of the average frequency is greater than a first time threshold; if yes, determine the increase compressor strategy as the target operation strategy; when the average frequency is less than the minimum preset frequency, determine whether the duration of the average frequency is greater than a second time threshold; if yes, determine the decrease compressor strategy as the target operation strategy.

[0022] In an implementation, the first adjusting module is configured to: count a number of compressors in the first compressor set to obtain a first number; when the target operation strategy is the increase compressor strategy, calculate a second number according to the first number, the average frequency, the maximum preset frequency, the minimum preset frequency and a first preset formula, the first preset formula being:

[0023]

[0024] wherein, m is the second number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the second number is a number of compressors to be started, G(θ) is a rounding function, G(θ) = 1 when θ < 1, and the rounding function is configured to output a positive integer obtained by rounding θ when θ ≥ 1; at least one compressor is selected from the non-started compressors to be started until the number of newly started compressors is equal to the second number or all the non-started compressors are started, and the newly started compressors and the compressors in the first compressor set are aggregated to obtain a second compressor set.

[0025] In an implementation, the second adjusting module is configured to: calculate a first frequency according to the first number, the average frequency, the second number and a second preset formula, the second preset formula being:

[0026]

[0027] wherein, f1 is the first frequency, x is the first number, y is the average frequency, and m is the second number; the first frequency is determined as a working frequency of each compressor in the second compressor set.

[0028] In an implementation, the first adjusting module is further configured to: count the number of compressors in the first compressor set to obtain a first number; when the target operation strategy is the compressor-reducing strategy, calculate a third number according to the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and a third preset formula, the third preset formula being:

[0029]

[0030] wherein n is the third number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the third number is the number of compressors to be closed, and G(θ) is an integer function, G(θ) = 1 when θ < 1, and G(θ) outputs a positive integer obtained by rounding θ when θ ≥ 1; select at least one compressor from the first compressor set to be closed until the number of closed compressors is equal to the third number or all compressors in the first compressor set are closed, delete the closed compressors in the first compressor set to obtain a second compressor set.

[0031] In an implementation, the second adjusting module is further configured to: when the second compressor set is not empty, calculate a second frequency according to the first number, the average frequency, the third number, and a fourth preset formula, the fourth preset formula being:

[0032]

[0033] wherein f2 is the second frequency, x is the first number, y is the average frequency, and n is the third number; determine the second frequency as the working frequency of each compressor in the second compressor set; and when the second compressor set is empty, set the working frequency of each compressor in the first compressor set to 0.

[0034] In an implementation, the compressor frequency control device further comprises a monitoring module configured to: monitor the actual time length during which each compressor in the second compressor set operates at the updated working frequency; when the actual time length is greater than a third time threshold, detect the change rate of the outlet water temperature; calculate an initial working frequency according to the change rate of the outlet water temperature; and determine the initial working frequency as the working frequency of each compressor in the second compressor set.

[0035] The third aspect of the present application provides a compressor frequency control device, comprising a memory and at least one processor, the memory storing instructions; the at least one processor calling the instructions in the memory to make the compressor frequency control device execute the compressor frequency control method described above.

[0036] The fourth aspect of the present application provides a computer readable storage medium, the computer readable storage medium storing instructions, when running on a computer, making the computer execute the compressor frequency control method described above.

[0037] In the technical solution provided by the present application, a first compressor set is obtained, and the compressors in the first compressor set are compressors in a running state; the working frequency of each compressor in the first compressor set is obtained, and an average frequency is calculated according to the working frequency of each compressor; a target running strategy is determined according to the average frequency, and the target running strategy is an increase compressor strategy or a decrease compressor strategy; the first compressor set is adjusted according to the target running strategy to obtain a second compressor set; and the working frequency of each compressor in the second compressor set is adjusted. In the embodiment of the present application, the running compressors are monitored, when the average power of the compressors in a running state is outside the preset frequency range and is too high, additional compressors are started to reduce the high load of the running compressors, and when the average power of the compressors in a running state is outside the preset frequency range and is too low, part of the running compressors are turned off to improve the working power of the remaining running compressors, thereby improving the running efficiency of the compressors. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 An embodiment of the compressor frequency control method in the embodiment of the present application is shown in the figure;

[0039] Figure 2 Another embodiment of the compressor frequency control method in the embodiment of the present application is shown in the figure;

[0040] Figure 3 Another embodiment of the compressor frequency control method in the embodiment of the present application is shown in the figure;

[0041] Figure 4 Another embodiment of the compressor frequency control method in the embodiment of the present application is shown in the figure;

[0042] Figure 5 An embodiment of the compressor frequency control device in the embodiment of the present application is shown in the figure;

[0043] Figure 6 Another embodiment of the compressor frequency control device in the embodiment of the present application is shown in the figure;

[0044] Figure 7 Fig. 1 is a schematic diagram of an embodiment of a compressor frequency control device according to the present application. DETAILED DESCRIPTION

[0045] The present application provides a compressor frequency control method, device, equipment and storage medium, which is used to improve operation efficiency.

[0046] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application, and above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover a non-sequential process unless expressly indicated otherwise. Further, the use of "including", "comprising" and "having" and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0047] For the convenience of understanding, the specific flow of the embodiment of the present application is described below. It can be understood that the execution subject of the present application can be a compressor frequency control device, and can also be a terminal or a server, and the specific place is not limited. The embodiment of the present application takes the server as an execution subject for example.

[0048] Referring to Figure 1 An embodiment of the compressor frequency control method in the present application includes:

[0049] 101, obtaining a first compressor set, the compressors in the first compressor set are compressors in a running state;

[0050] At present, the common way for air conditioning of large space area is to connect multiple air conditioning units in parallel to control the large space area by increasing the total system displacement. Each air conditioning unit includes at least one compressor, and at least one compressor in each air conditioning unit can work independently, so that the compressor operation can be flexibly selected. However, if too many compressors are operated, although the air conditioning demand is met, the working frequency of the compressor is low. If too few compressors are operated, in order to meet the air conditioning demand, the compressor needs to be operated under heavy load, which affects the service life of the compressor.

[0051] The server obtains the compressors currently in a running state, aggregates the compressors in a running state, and obtains a first compressor set.

[0052] 102、acquire the working frequency of each compressor in the first compressor set, and calculate the average frequency according to the working frequency of each compressor;

[0053] The server acquires the working frequency of each compressor in the first compressor set, which can be the same or different. The server calculates the total number of compressors in the first compressor set to obtain the first quantity, calculates the total frequency sum of all compressors in the first compressor set, and determines the quotient of the total frequency sum and the first quantity as the average frequency.

[0054] 103、determine the target operation strategy according to the average frequency, which is an increase compressor strategy or a decrease compressor strategy;

[0055] The server acquires the optimal operating frequency range of the compressor, determines the maximum preset frequency as the maximum value of the optimal operating frequency range, and determines the minimum preset frequency as the minimum value of the optimal operating frequency range. When the average frequency is greater than the maximum preset frequency, the server determines that the currently running compressor is in a high load state, and at this time, if there is a compressor that has not been started, the increase compressor strategy is determined as the target operation strategy; when the average frequency is less than the maximum preset frequency, the server determines that the currently running compressor is running in excess, and at this time, the decrease compressor strategy is determined as the target operation strategy.

[0056] Optionally, different optimal operating frequency ranges can be flexibly set according to different running number values in the first compressor set to achieve the best control effect. For example, assuming that m is the first quantity, when 0

[0057] 104、adjust the first compressor set according to the target operation strategy to obtain a second compressor set;

[0058] When the target operation strategy is the increase compressor strategy, the server acquires the optimal working efficiency of the compressor, which can be the middle value of the optimal operating frequency range, divides the total frequency sum of all compressors in the first compressor set by the optimal working efficiency to obtain an integer value as the target quantity, determines the difference between the target quantity and the first quantity as the second quantity, which is the number of compressors to be started, selects compressors one by one from the compressors that have not been started, and starts them until the number of newly started compressors is equal to the second quantity or all the compressors that have not been started are started, and then the newly started compressors and the compressors in the first compressor set are aggregated to obtain the second compressor set.

[0059] When the target operation strategy is the compressor reduction strategy, the server determines a third quantity as a difference between the first quantity and the target quantity, the third quantity is a quantity of compressors to be turned off, turns off the compressors in the first compressor set one by one until the quantity of turned-off compressors is equal to the third quantity or all the compressors in the first compressor set are turned off, deletes the turned-off compressors in the first compressor set, and obtains a second compressor set, the second compressor set can be an empty set.

[0060] 105、adjusting the working frequency of each compressor in the second compressor set.

[0061] The server calculates a total quantity of the compressors in the second compressor set, obtains a fourth quantity, when the fourth quantity is 0, it means that all the compressors are turned off, and the working frequency of all the compressors is set to 0; when the fourth quantity is not 0 and the target operation strategy is the compressor increase strategy, the server calculates a sum of the first quantity and the second quantity, obtains a fifth quantity, and determines a ratio of a total sum of the frequencies of all the compressors in the first compressor set to the fifth quantity as the working frequency of each compressor in the second compressor set; when the fourth quantity is not 0 and the target operation strategy is the compressor reduction strategy, the server calculates a difference between the first quantity and the third quantity, obtains a sixth quantity, and determines a ratio of the total sum of the frequencies of all the compressors in the first compressor set to the sixth quantity as the working frequency of each compressor in the second compressor set.

[0062] In the embodiment of the application, the running compressors are monitored, when the average power of the compressors in the running state is out of the preset frequency range and is too high, additional compressors are started to reduce the high load of the running compressors, when the average power of the compressors in the running state is out of the preset frequency range and is too low, part of the running compressors are turned off to improve the working power of the remaining running compressors, and the operation efficiency of the compressors is improved.

[0063] Please refer to Figure 2 Another embodiment of the compressor frequency control method in the embodiment of the application includes:

[0064] 201、obtaining a first compressor set, the compressors in the first compressor set are compressors in a running state;

[0065] 202、obtaining a working frequency of each compressor in the first compressor set, and calculating an average frequency according to the working frequency of each compressor;

[0066] The steps 201-202 in the embodiment are the same as the steps 101-102, and will not be repeated here.

[0067] 203、judging whether the average frequency is greater than a maximum preset frequency;

[0068] The server obtains an optimal operating frequency range of the compressor, determines a maximum preset frequency as a maximum value of the optimal operating frequency range and a minimum preset frequency as a minimum value of the optimal operating frequency range, and determines whether the average frequency is greater than the maximum preset frequency.

[0069] 204、When the average frequency is greater than the maximum preset frequency, it is determined whether there is a non-started compressor;

[0070] When the average frequency is greater than the maximum preset frequency, the server determines that the currently operating compressor is in a high-load state, and determines whether there is a non-started compressor, which in this embodiment refers to a compressor that is normally functional but not activated.

[0071] 205、If yes, it is determined whether the duration of the average frequency is greater than a first time threshold;

[0072] If there is a non-started compressor, it means that there is another compressor that can be used to share the load of the operating compressor. To avoid misjudgment, the server monitors whether the duration of the average frequency corresponding to the first compressor set is greater than a first time threshold. If the duration of the average frequency can exceed the first time threshold, the server confirms that the compressor of the first compressor set is stable and the value of the average frequency is accurate.

[0073] 206、If yes, the increase compressor strategy is determined as a target operating strategy;

[0074] 207、The first compressor set is adjusted according to the target operating strategy to obtain a second compressor set;

[0075] The server counts the number of compressors in the first compressor set to obtain a first quantity. When the target operating strategy is the increase compressor strategy, the second quantity is obtained by calculation according to the first quantity, the average frequency, the maximum preset frequency, the minimum preset frequency, and a first preset formula.

[0076]

[0077] Wherein, m is the second quantity, x is the first quantity, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the second quantity is the number of compressors to be started, and G(θ) is an integer function, G(θ) = 1 when θ < 1, and the integer function is used to output a positive integer obtained by rounding θ when θ ≥ 1.

[0078] For example, when θ = 0.4, G(0.4) = 1; when θ = 1.5, G(1.5) = 2; and when θ = 4.2, G(4.2) = 4.

[0079] The server selects at least one compressor from the non-started compressors to start until the number of newly started compressors is equal to the second number or all the non-started compressors are started, and then the newly started compressors and the compressors in the first compressor set are aggregated to obtain a second compressor set.

[0080] Specifically, the server selects the first compressor to start according to a preset priority selection rule, and after the first compressor runs for a preset time length, the second compressor is selected to start according to the preset priority selection rule, and after the second compressor runs for a preset time length, the third compressor is selected to start according to the preset priority selection rule, and so on, until the number of newly started compressors is equal to the second number or all the non-started compressors are started, which can ensure that each compressor smoothly transits from starting to running state and reduces electric field interference.

[0081] Here, a setting mode of a priority selection rule is given. In order to facilitate description, the composition of the parallel air conditioning units is first described. Each air conditioning unit includes at least one air cavity system, and each air cavity system includes at least one compressor. The priority selection rule is as follows:

[0082] 1. Determine whether there is a first air cavity system that contains both running compressors and non-started compressors. If there is, select one non-started compressor in the first air cavity system to start;

[0083] 2. If not, determine whether there is a first air conditioning unit that is not started. If there is a first air conditioning unit, select one compressor in the first air conditioning unit to start;

[0084] 3. If not, determine whether there is a second air conditioning unit that contains both running air cavity systems and non-running air cavity systems. If there is, select one compressor in the non-running air cavity system of the second air conditioning unit to start;

[0085] 4. If not, select the compressor with the least running time to start.

[0086] The setting of the priority selection rule makes the compressors run as much as possible in the same air cavity system and the same air conditioning unit, fully utilizes the consumption of the shared parts, reduces unnecessary power consumption, saves costs, or selects the compressors with less running time to balance the use time of the compressors, so that the losses of the air conditioning units tend to be synchronized and maintain a good running state.

[0087] 208. Adjust the working frequency of each compressor in the second compressor set.

[0088] The server calculates the first frequency according to the first number, the average frequency, the second number, and a second preset formula. The second preset formula is:

[0089]

[0090] wherein, f1 is the first frequency, x is the first quantity, y is the average frequency, and m is the second quantity, and the first frequency is determined as the working frequency of each compressor in the second compressor set.

[0091] In the embodiment of the present application, the running compressor is monitored, when the average power of the compressor in the running state is out of the preset frequency range and is high, the additional compressor is started to reduce the high load of the running compressor, and the running efficiency of the compressor is improved.

[0092] Please refer to Figure 3 Another embodiment of the compressor frequency control method in the embodiment of the present application comprises:

[0093] 301, a first compressor set is obtained, and the compressors in the first compressor set are compressors in a running state;

[0094] 302, the working frequency of each compressor in the first compressor set is obtained, and the average frequency is calculated according to the working frequency of each compressor;

[0095] The steps 301-302 in the embodiment are the same as the steps 101-102, and will not be repeated here.

[0096] 303, whether the average frequency is less than the minimum preset frequency is judged;

[0097] The server obtains the optimal running frequency range of the compressor, determines the maximum value of the optimal running frequency range as the maximum preset frequency, and determines the minimum value of the optimal running frequency range as the minimum preset frequency, and judges whether the average frequency is less than the minimum preset frequency.

[0098] 304, when the average frequency is less than the minimum preset frequency, whether the duration of the average frequency is greater than the second time threshold is judged;

[0099] When the average frequency is less than the maximum preset frequency, in order to avoid misjudgment, the server monitors whether the duration of the average frequency corresponding to the first compressor set is greater than the second time threshold, if the duration of the average frequency can exceed the second time threshold, the server confirms that the compressor of the first compressor set is stable, and the value of the average frequency is accurate.

[0100] 305, if yes, the compressor reduction strategy is determined as the target running strategy;

[0101] 306, the first compressor set is adjusted according to the target running strategy to obtain a second compressor set;

[0102] The server counts the number of compressors in the first compressor set to obtain a first number, and when the target operation strategy is the compressor reduction strategy, the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and a third preset formula are used for calculation to obtain a third number, and the third preset formula is:

[0103]

[0104] wherein n is the third number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the third number is the number of compressors to be closed, and G(θ) is an integer function, wherein when θ<1, G(θ)=1, and when θ≥1, the integer function is used to output a positive integer obtained by rounding θ.

[0105] For example, when θ=0.4, G(0.4)=1; when θ=1.5, G(1.5)=2; and when θ=4.2, G(4.2)=4.

[0106] The server selects at least one compressor from the first compressor set to be closed until the number of closed compressors is equal to the third number or all compressors in the first compressor set are closed, and deletes the closed compressors in the first compressor set to obtain a second compressor set.

[0107] Specifically, the server selects the first compressor to be closed according to a preset priority closing rule, and after the first compressor is closed for a preset time length, the second compressor is selected to be closed according to the preset priority closing rule, and after the second compressor is closed for a preset time length, the third compressor is selected to be closed according to the preset priority closing rule, and so on, until the number of closed compressors is equal to the third number or all compressors are closed, so as to ensure a good transition in human body feeling in the temperature control area and ensure comfort.

[0108] Here, a setting mode of the priority closing rule is given. For the convenience of description, the constitution of the parallel air conditioning unit is first described, each air conditioning unit includes at least one air cavity system, and each air cavity system includes at least one compressor. The priority closing rule is as follows:

[0109] 1. It is judged whether there is a second air cavity system containing both a running compressor and a non-started compressor, if there is, a running compressor in the second air cavity system is selected to be closed;

[0110] 2. If not, it is judged whether there is a third air conditioning unit in which all air cavity systems are running, if there is a third air conditioning unit, a compressor in the third air conditioning unit is selected to be closed;

[0111] 3. If not, the compressor with the longest running time is closed.

[0112] The setting of the priority closing rule makes the compressors concentrate on the same air cavity system as much as possible, fully utilizes the consumption of the shared part, reduces unnecessary power consumption, saves cost, or selects the compressor with long running time to balance the use time of the compressors, so that the loss of each air conditioning unit tends to be synchronized, and a good running state is maintained.

[0113] 307、adjusting the working frequency of each compressor in the second compressor set.

[0114] When the second compressor set is not empty, the server calculates the second frequency according to the first quantity, the average frequency, the third quantity, and the fourth preset formula, and the fourth preset formula is:

[0115]

[0116] Wherein, f2 is the second frequency, x is the first quantity, y is the average frequency, and n is the third quantity, and the second frequency is determined as the working frequency of each compressor in the second compressor set,

[0117] When the second compressor set is empty, the working frequency of each compressor in the first compressor set is set to 0. It should be noted that as long as the first compressor set is not empty, the compressor needs to run to meet the demand of air conditioning, and when the second compressor set is empty, the effect of air conditioning is lost, therefore, when the second compressor set is empty, the server continuously detects the temperature of the water outlet of each air conditioning unit, and when the temperature of the water outlet meets the preset starting condition, the air conditioning unit with the shortest running time is started.

[0118] In the embodiment of the application, the running compressors are monitored, and when the average power of the compressors in the running state is outside the preset frequency range and is low, part of the running compressors are closed to improve the working power of the remaining running compressors, and the running efficiency of the compressors is improved.

[0119] Please refer to Figure 4 Another embodiment of the compressor frequency control method in the embodiment of the application includes:

[0120] 401、obtaining a first compressor set, the compressors in the first compressor set being compressors in a running state;

[0121] 402、obtaining the working frequency of each compressor in the first compressor set, and calculating the average frequency according to the working frequency of each compressor;

[0122] 403、determining a target running strategy according to the average frequency, the target running strategy being an increase compressor strategy or a decrease compressor strategy;

[0123] 404、adjust the first compressor set according to the target operation strategy to obtain a second compressor set;

[0124] 405、adjust the working frequency of each compressor in the second compressor set;

[0125] The steps 401-405 of the embodiment are the same as the steps 101-105, and will not be described here.

[0126] 406、monitor the actual time length of each compressor in the second compressor set running at the updated working frequency;

[0127] 407、when the actual time length is greater than a third time length threshold, detect the change rate of the outlet water temperature;

[0128] When the actual time length is greater than the third time length threshold, the server confirms that the working of each compressor in the second compressor set is stable, and at this time, the outlet water temperature of each air conditioning unit corresponding to the compressor in the running state is monitored, and the change rate of the outlet water temperature of each air conditioning unit is calculated.

[0129] 408、calculate an initial working frequency according to the change rate of the outlet water temperature;

[0130] The initial working frequency is in a positive correlation with the change rate of the outlet water temperature, the greater the change rate of the outlet water temperature, the greater the initial working frequency, and a proportional coefficient is set according to the parameters of the air conditioning unit, and when the server detects that the change rate of the outlet water temperature of an air conditioning unit is greater than a temperature threshold, the initial working frequency is calculated according to the change rate of the outlet water temperature.

[0131] 409、determine the initial working frequency as the working frequency of each compressor in the second compressor set.

[0132] The server determines the initial working frequency as the working frequency of each compressor in the second compressor set. The external environment changes all the time, and the environmental change parameter is introduced through the initial working frequency to achieve the purpose of flexibly and accurately controlling the operation of the compressor.

[0133] In the embodiment of the application, the running compressor is monitored, when the average power of the compressor in the running state is outside the preset frequency range and is too high, an additional compressor is started to reduce the high load of the running compressor, and when the average power of the compressor in the running state is outside the preset frequency range and is too low, part of the running compressor is turned off to improve the working power of the remaining running compressor, the running efficiency of the compressor is improved, the environmental change information is obtained through the monitoring of the outlet water, the frequency of the compressor operation is adjusted according to the environmental change information, and the purpose of flexibly and accurately controlling the operation of the compressor is achieved.

[0134] The compressor frequency control method in the embodiments of the present application is described above, and the compressor frequency control device in the embodiments of the present application is described below. Please refer to Figure 5 One embodiment of the compressor frequency control device in the embodiments of the present application includes:

[0135] The acquisition module 501 is configured to acquire a first compressor set, and the compressors in the first compressor set are compressors in a running state.

[0136] The calculation module 502 is configured to acquire the working frequency of each compressor in the first compressor set, and calculate an average frequency according to the working frequency of each compressor.

[0137] The determination module 503 is configured to determine a target running strategy according to the average frequency, and the target running strategy is an increase compressor strategy or a decrease compressor strategy.

[0138] The first adjustment module 504 is configured to adjust the first compressor set according to the target running strategy to obtain a second compressor set.

[0139] The second adjustment module 505 is configured to adjust the working frequency of each compressor in the second compressor set.

[0140] In the embodiments of the present application, the running compressors are monitored, when the average power of the compressors in a running state is outside the preset frequency range and is too high, additional compressors are started to reduce the high load of the running compressors, and when the average power of the compressors in a running state is outside the preset frequency range and is too low, part of the running compressors are turned off to improve the working power of the remaining running compressors, thereby improving the running efficiency of the compressors.

[0141] Please refer to Figure 6 Another embodiment of the compressor frequency control device in the embodiments of the present application includes:

[0142] The acquisition module 501 is configured to acquire a first compressor set, and the compressors in the first compressor set are compressors in a running state.

[0143] The calculation module 502 is configured to acquire the working frequency of each compressor in the first compressor set, and calculate an average frequency according to the working frequency of each compressor.

[0144] The determination module 503 is configured to determine a target running strategy according to the average frequency, and the target running strategy is an increase compressor strategy or a decrease compressor strategy.

[0145] The first adjustment module 504 is configured to adjust the first compressor set according to the target running strategy to obtain a second compressor set.

[0146] The second adjusting module 505 is configured to adjust the working frequency of each compressor in the second compressor set.

[0147] Optionally, the determining module 503 is specifically configured to:

[0148] determine whether the average frequency is greater than the maximum preset frequency or less than the minimum preset frequency; when the average frequency is greater than the maximum preset frequency, determine whether there is a non-started compressor; if yes, determine whether the duration of the average frequency is greater than the first time threshold; if yes, determine the increase compressor strategy as the target running strategy; when the average frequency is less than the minimum preset frequency, determine whether the duration of the average frequency is greater than the second time threshold; if yes, determine the decrease compressor strategy as the target running strategy.

[0149] Optionally, the first adjusting module 504 is specifically configured to:

[0150] count the number of compressors in the first compressor set to obtain a first number; when the target running strategy is the increase compressor strategy, calculate a second number according to the first number, the average frequency, the maximum preset frequency, the minimum preset frequency and a first preset formula, the first preset formula being:

[0151]

[0152] wherein m is the second number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the second number is the number of compressors to be started, G(θ) is an integer function, G(θ) = 1 when θ < 1, and the integer function is used to output a positive integer obtained by rounding θ when θ ≥ 1; at least one compressor is selected from the non-started compressors to be started until the number of newly started compressors is equal to the second number or all the non-started compressors are started, and the newly started compressors and the compressors in the first compressor set are summarized to obtain a second compressor set.

[0153] Optionally, the second adjusting module 505 is specifically configured to:

[0154] calculate a first frequency according to the first number, the average frequency, the second number and a second preset formula, the second preset formula being:

[0155]

[0156] wherein f1 is the first frequency, x is the first number, y is the average frequency, and m is the second number; the first frequency is determined as the working frequency of each compressor in the second compressor set.

[0157] Optionally, the first adjusting module 504 is further specifically configured to:

[0158] counting the number of compressors in the first compressor set to obtain a first number; when the target operation strategy is the compressor reduction strategy, calculating a third number according to the first number, the average frequency, a maximum preset frequency, a minimum preset frequency and a third preset formula, the third preset formula being:

[0159]

[0160] wherein n is the third number, x is the first number, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the third number is the number of compressors to be closed, and G(θ) is a rounding function, G(θ) = 1 when θ < 1, and the rounding function is used to output a positive integer obtained by rounding θ when θ ≥ 1; selecting at least one compressor from the first compressor set to be closed until the number of closed compressors is equal to the third number or all compressors in the first compressor set are closed, deleting the closed compressors in the first compressor set to obtain a second compressor set.

[0161] Optionally, the second adjusting module 505 is further configured to:

[0162] when the second compressor set is not empty, calculating a second frequency according to the first number, the average frequency, the third number and a fourth preset formula, the fourth preset formula being:

[0163]

[0164] wherein f2 is the second frequency, x is the first number, y is the average frequency, and n is the third number; determining the second frequency as the working frequency of each compressor in the second compressor set; and when the second compressor set is empty, setting the working frequency of each compressor in the first compressor set to 0.

[0165] Optionally, the compressor frequency control device further comprises a monitoring module 506, which is configured to:

[0166] monitoring the actual duration for which each compressor in the second compressor set operates at the updated working frequency; when the actual duration is greater than a third duration threshold, detecting the rate of change of the outlet water temperature; calculating an initial working frequency according to the rate of change of the outlet water temperature; and determining the initial working frequency as the working frequency of each compressor in the second compressor set.

[0167] The embodiment of the present application monitors the compressor in operation, when the average power of the compressor in operation is out of the preset frequency range and is too high, the additional compressor is started to reduce the high load of the compressor in operation, when the average power of the compressor in operation is out of the preset frequency range and is too low, part of the compressor in operation is closed to improve the working power of the remaining compressor in operation, the operation efficiency of the compressor is improved, the environmental change information is obtained through the monitoring of the water outlet, the frequency of the compressor operation is adjusted according to the environmental change information, the purpose of flexibly and accurately controlling the compressor operation is realized.

[0168] The above Figure 5 And Figure 6 The compressor frequency control device in the embodiment of the present application is described in detail from the perspective of the modular functional entity, and the compressor frequency control device in the embodiment of the present application is described in detail from the perspective of hardware processing.

[0169] Figure 7 The compressor frequency control device 700 can be different due to different configurations or performances, and can include one or more processors (central processing units, CPU) 710 (for example, one or more processors) and a memory 720, one or more storage media 730 (for example, one or more mass storage devices) storing application programs 733 or data 732. Among them, the memory 720 and the storage medium 730 can be temporary storage or persistent storage. The program stored in the storage medium 730 can include one or more modules (not shown in the figure), each module can include a series of instruction operations in the compressor frequency control device 700. Further, the processor 710 can be configured to communicate with the storage medium 730, and execute a series of instruction operations in the storage medium 730 on the compressor frequency control device 700.

[0170] The compressor frequency control device 700 can also include one or more power supplies 740, one or more wired or wireless network interfaces 750, one or more input / output interfaces 760, and / or one or more operating systems 731, such as Windows Serve, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art can understand that, Figure 7 The structure of the compressor frequency control device shown does not constitute a limitation on the compressor frequency control device, and can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0171] The application further provides a compressor frequency control device, the computer device comprising a memory and a processor, the memory storing computer readable instructions, the computer readable instructions being executed by the processor to make the processor execute the steps of the compressor frequency control method in each of the embodiments.

[0172] The application further provides a computer readable storage medium, which can be a non-volatile computer readable storage medium or a volatile computer readable storage medium, the computer readable storage medium storing instructions, the instructions making a computer execute the steps of the compressor frequency control method when the instructions are run on the computer.

[0173] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0174] The integrated unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the application or the whole or part of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0175] The above-described embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A compressor frequency control method, characterized in that, The compressor frequency control method includes: Obtain a first set of compressors, wherein the compressors in the first set of compressors are compressors that are in operation; Obtain the operating frequency of each compressor in the first compressor set, and calculate the average frequency based on the operating frequency of each compressor; The target operating strategy is determined based on the average frequency, wherein the target operating strategy is either to increase the compressor or to decrease the compressor. The first compressor set is adjusted according to the target operating strategy to obtain the second compressor set; Adjust the operating frequency of each compressor in the second compressor set; The step of adjusting the first compressor set according to the target operating strategy to obtain the second compressor set includes: counting the number of compressors in the first compressor set to obtain a first number; when the target operating strategy is an increase compressor strategy, calculating the second number based on the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and a first preset formula, where the maximum preset frequency is the maximum value of the compressor's optimal operating frequency range, and the minimum preset frequency is the minimum value of the compressor's optimal operating frequency range; selecting at least one compressor from the unstarted compressors to start, until the number of newly started compressors equals the second number or all unstarted compressors are started; summing the newly started compressors and the compressors in the first compressor set to obtain the second compressor set. The compressor selection is based on a priority selection rule: First, it is determined whether a first air chamber system exists that simultaneously contains both running and non-running compressors. If so, one non-running compressor from the first air chamber system is selected for startup. If not, it is determined whether a first air conditioning unit exists that is not running. If so, one compressor from the first air conditioning unit is selected for startup. If not, it is determined whether a second air conditioning unit exists that simultaneously contains both running and non-running air chamber systems. If so, one compressor from the non-running air chamber system of the second air conditioning unit is selected for startup. If not, the compressor with the shortest running time is selected for startup. Each air conditioning unit includes at least one air chamber system, and each air chamber system includes at least one compressor. After adjusting the operating frequency of each compressor in the second compressor set, the method further includes: monitoring the actual duration for which each compressor in the second compressor set operates at the updated operating frequency; when the actual duration exceeds a third duration threshold, detecting the rate of change of the outlet temperature; calculating the initial operating frequency based on the rate of change of the outlet temperature; and determining the initial operating frequency as the operating frequency of each compressor in the second compressor set. The first preset formula is: Where m is the second quantity, x is the first quantity, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the second quantity is the number of compressors to be started, and G(θ) is the rounding function. When θ < 1, G(θ) = 1. When θ ≥ 1, the rounding function is used to output the positive integer obtained by rounding θ.

2. The compressor frequency control method according to claim 1, characterized in that, The step of determining the target operating strategy based on the average frequency includes: Determine whether the average frequency is greater than the maximum preset frequency or less than the minimum preset frequency; When the average frequency is greater than the maximum preset frequency, determine whether there is an unstarted compressor; If so, determine whether the duration of the average frequency is greater than the first duration threshold. If so, the compressor addition strategy will be determined as the target operating strategy; When the average frequency is less than the minimum preset frequency, determine whether the duration of the average frequency is greater than the second duration threshold. If so, the strategy of reducing compressor usage will be determined as the target operating strategy.

3. The compressor frequency control method according to claim 1, characterized in that, The adjustment of the operating frequency of each compressor in the second compressor set includes: The first frequency is obtained by calculating based on the first quantity, the average frequency, the second quantity, and the second preset formula. The second preset formula is as follows: Where f1 is the first frequency, x is the first quantity, y is the average frequency, and m is the second quantity; The first frequency is determined to be the operating frequency of each compressor in the second compressor set.

4. The compressor frequency control method according to claim 1, characterized in that, The step of adjusting the first compressor set according to the target operating strategy to obtain the second compressor set includes: Count the number of compressors in the first set of compressors to obtain the first count; When the target operating strategy is to reduce the compressor, the third quantity is calculated based on the first quantity, the average frequency, the maximum preset frequency, the minimum preset frequency, and the third preset formula. The third preset formula is: Where n is the third quantity, x is the first quantity, y is the average frequency, a is the maximum preset frequency, b is the minimum preset frequency, the third quantity is the number of compressors to be shut down, and G(θ) is the rounding function. When θ < 1, G(θ) = 1. When θ ≥ 1, the rounding function is used to output the positive integer obtained by rounding θ. At least one compressor is selected from the first compressor set to be shut down, until the number of compressors shut down is equal to the third number or all compressors in the first compressor set are shut down. The shut-down compressors in the first compressor set are then deleted to obtain the second compressor set.

5. The compressor frequency control method according to claim 4, characterized in that, The adjustment of the operating frequency of each compressor in the second compressor set includes: When the second compressor set is not empty, the second frequency is calculated based on the first quantity, the average frequency, the third quantity, and the fourth preset formula. The fourth preset formula is: Where f2 is the second frequency, x is the first quantity, y is the average frequency, and n is the third quantity; The second frequency is determined to be the operating frequency of each compressor in the second compressor set; When the second compressor set is empty, the operating frequency of each compressor in the first compressor set is set to 0.

6. A compressor frequency control device, characterized in that, The compressor frequency control device includes: The acquisition module is used to acquire a first set of compressors, wherein the compressors in the first set of compressors are compressors that are in operation. The calculation module is used to obtain the operating frequency of each compressor in the first compressor set and calculate the average frequency based on the operating frequency of each compressor. A determining module is used to determine a target operating strategy based on the average frequency, wherein the target operating strategy is a strategy to increase compressors or a strategy to decrease compressors; The first adjustment module is used to adjust the first compressor set according to the target operating strategy to obtain the second compressor set; The second adjustment module is used to adjust the operating frequency of each compressor in the second compressor set; The first adjustment module is specifically used for: counting the number of compressors in the first compressor set to obtain a first number; when the target operating strategy is to increase the number of compressors, calculating a second number based on the first number, the average frequency, the maximum preset frequency, the minimum preset frequency, and the first preset formula, where the maximum preset frequency is the maximum value of the compressor's optimal operating frequency range, and the minimum preset frequency is the minimum value of the compressor's optimal operating frequency range; selecting at least one compressor from the unstarted compressors to start, until the number of newly started compressors equals the second number or all unstarted compressors are started; summing the newly started compressors and the compressors in the first compressor set to obtain a second compressor set, wherein, according to the priority selection rule... The compressor selection priority rule is as follows: First, determine if there exists a first air chamber system that simultaneously includes both running and non-running compressors. If so, select one non-running compressor from the first air chamber system to start. If not, determine if there exists a non-running first air conditioning unit. If so, select one compressor from the first air conditioning unit to start. If not, determine if there exists a second air conditioning unit that simultaneously includes both running and non-running air chamber systems. If so, select one compressor from the non-running air chamber system of the second air conditioning unit to start. If not, select the compressor with the shortest running time to start. Each air conditioning unit includes at least one air chamber system, and each air chamber system includes at least one compressor. The compressor frequency control device also includes a monitoring module, which is specifically used to: monitor the actual duration for which each compressor in the second compressor set operates at the updated operating frequency; when the actual duration exceeds a third duration threshold, detect the rate of change of the outlet temperature; calculate the initial operating frequency based on the rate of change of the outlet temperature; and determine the initial operating frequency as the operating frequency of each compressor in the second compressor set.

7. A compressor frequency control device, characterized in that, The compressor frequency control device includes: a memory and at least one processor, wherein the memory stores instructions; The at least one processor invokes the instructions in the memory to cause the compressor frequency control device to perform the compressor frequency control method as described in any one of claims 1-5.

8. A computer-readable storage medium storing instructions thereon, characterized in that, When the instruction is executed by the processor, it implements the compressor frequency control method as described in any one of claims 1-5.

Images