Reciprocating compressor unit load adjustment method, device, terminal and medium

Abstract

The present application provides a method, device, terminal and medium for adjusting the load of a reciprocating compressor unit, and belongs to the field of computer technology. The method includes: obtaining the target tank pressure interval to which the current tank pressure signal value belongs, and one tank pressure interval corresponds to a load value of a compressor; according to the target tank pressure interval, determining the target load state information, the target load state information is used to indicate the target start and stop state and target load value of each compressor in the compressor unit; in response to the target load state information not being consistent with the actual load state information, adjusting the load value and start and stop state of each compressor step by step according to the target load state information. The above technical scheme can timely adjust the load state of each compressor in the compressor unit step by step according to the current tank pressure signal value, without the need for manual intervention, reducing the probability of misoperation, improving reliability and accuracy, and avoiding safety hazards.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a method, device, terminal and medium for regulating the load of a reciprocating compressor unit. Background Art

[0002] As a typical positive displacement compressor, reciprocating compressors are widely used in the fields of petroleum, natural gas, and chemical industry. Especially in large low-temperature (such as liquefied natural gas, liquefied ethylene gas, liquefied petroleum gas, etc.) storage tanks, they are generally used to handle the evaporation gas generated by environmental heat leakage in the storage tanks, and control the pressure of the storage tanks within an operable safe range. When the compressed gas volume exceeds the capacity of a single reciprocating machine, other parallel compressor units are usually started to meet the gas volume demand. For example, when the gas volume is low, only one compressor is running; as the gas volume increases, the number of compressors in operation increases accordingly; until the gas volume approaches the peak value, the entire compressor unit is put into use. Therefore, the load adjustment method and control effect of the reciprocating compressor unit are of great significance to maintaining the safety of the storage tank.

[0003] At present, the load regulation of a single reciprocating compressor is usually achieved by using the clearance adjustment and the unloader to coordinate the single load from 25%, 50%, 75% to 100%. The step-by-step change of the load of a single reciprocating compressor and the adjustment of the number of compressor units currently in operation are manually controlled, that is, the operator manually controls the load of the compressor through the DCS (Distributed Control System) screen to maintain the pressure stability of the tank system.

[0004] The problem with the above implementation is that the start-up and shutdown of the compressor requires manual intervention, which is labor-intensive and prone to misoperation. In addition, the control of load regulation is mostly based on experience, resulting in low reliability and accuracy, affecting the energy consumption level of the device and may even cause safety hazards. Summary of the invention

[0005] The embodiment of the present application provides a method, device, terminal and storage medium for adjusting the load of a reciprocating compressor unit, which can timely adjust the load state of each compressor in the compressor unit according to the current tank pressure signal value, without manual intervention, reducing the probability of misoperation, improving reliability and accuracy, and avoiding safety hazards. The technical solution is as follows:

[0006] In one aspect, a method for adjusting the load of a reciprocating compressor unit is provided, the method comprising:

[0007] Get the target tank pressure interval to which the current tank pressure signal value belongs. One tank pressure interval corresponds to one load value of one compressor.

[0008] Determining target load state information according to the target tank pressure range, wherein the target load state information is used to indicate the target start / stop state and target load value of each compressor in the compressor group;

[0009] In response to the target load state information not being consistent with the actual load state information, the load value and start / stop state of each compressor are adjusted according to the target load state information, and the actual load state information is used to indicate the actual start / stop state and actual load value of each compressor.

[0010] In an optional implementation, in response to the target load state information not being consistent with the actual load state information, adjusting the load value and the start / stop state of each compressor step by step according to the target load state information includes:

[0011] In response to the target load state information not being consistent with the actual load state information, obtaining a current load value of a target compressor, wherein the target compressor is a compressor in the compressor group that has been started and has been started most recently;

[0012] According to the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors whose start order is adjacent to the target compressor is adjusted step by step from the current load value.

[0013] In an optional implementation, the step of adjusting, based on the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in a start order from the current load value step by step includes:

[0014] Obtaining a first tank pressure interval corresponding to a current load value of the target compressor;

[0015] In response to the upper limit value of the target tank pressure interval being greater than the upper limit value of the first tank pressure interval and not greater than the upper limit value of the second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the second tank pressure interval is the tank pressure interval corresponding to the highest load value of the target compressor.

[0016] In an optional implementation, the step of adjusting, based on the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in a start order from the current load value step by step includes:

[0017] Obtaining a first tank pressure interval corresponding to a current load value of the target compressor;

[0018] In response to the lower limit value of the target tank pressure interval being less than the lower limit value of the first tank pressure interval and not less than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the third tank pressure interval is the tank pressure interval corresponding to the lowest load value of the target compressor.

[0019] In an optional implementation, the step of adjusting, based on the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in a start order from the current load value step by step includes:

[0020] Acquire a second tank pressure interval corresponding to the maximum load value of the target compressor;

[0021] In response to the upper limit value of the target tank pressure interval being greater than the upper limit value of the second tank pressure interval, the load value of the target compressor is gradually increased from the current load value, and the first compressor is started, and the start order of the first compressor is adjacent to and later than that of the target compressor.

[0022] In an optional implementation, the step of adjusting, based on the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in a start order from the current load value step by step includes:

[0023] Obtaining a third tank pressure interval corresponding to the target compressor minimum load value;

[0024] In response to the lower limit value of the target tank pressure interval being smaller than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the target compressor is turned off.

[0025] In an optional implementation, the method further includes:

[0026] In response to the tank pressure signal value continuously increasing to the upper limit value of the target tank pressure range, outputting a load increase signal, wherein the load increase signal is used to instruct a target compressor to increase the load, wherein the target compressor is a compressor that has been started and recently started in the compressor group;

[0027] In response to the tank pressure signal value continuously decreasing to the lower limit value of the target tank pressure range, a load reduction signal is output, wherein the load reduction signal is used to instruct the target compressor to reduce the load.

[0028] On the other hand, a device for adjusting the load of a reciprocating compressor unit is provided, the device comprising:

[0029] An acquisition module is used to acquire the target tank pressure interval to which the current tank pressure signal value belongs, and one tank pressure interval corresponds to a load value of a compressor;

[0030] A determination module, used to determine target load state information according to the target tank pressure range, wherein the target load state information is used to indicate a target start / stop state and a target load value of each compressor in the compressor group;

[0031] The adjustment module is used to adjust the load value and start / stop status of each compressor step by step according to the target load status information in response to the target load status information not being consistent with the actual load status information, wherein the actual load status information is used to indicate the actual start / stop status and actual load value of each compressor.

[0032] In an optional implementation, the adjustment module includes:

[0033] an acquisition unit, configured to acquire a current load value of a target compressor in response to the target load state information not being consistent with the actual load state information, wherein the target compressor is a compressor in the compressor group that has been started and has been started most recently;

[0034] The adjustment unit is used to adjust the load value of the target compressor, the start / stop state of the target compressor, and at least one of the start / stop states of other compressors whose start order is adjacent to the target compressor step by step from the current load value according to the target load state information.

[0035] In an optional implementation, the adjustment unit is used to obtain a first tank pressure interval corresponding to a current load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the first tank pressure interval and not greater than an upper limit value of a second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the second tank pressure interval is a tank pressure interval corresponding to the highest load value of the target compressor.

[0036] In an optional implementation, the adjustment unit is used to obtain a first tank pressure interval corresponding to the current load value of the target compressor; in response to the lower limit value of the target tank pressure interval being less than the lower limit value of the first tank pressure interval and not less than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the third tank pressure interval is the tank pressure interval corresponding to the lowest load value of the target compressor.

[0037] In an optional implementation, the adjustment unit is used to obtain a second tank pressure interval corresponding to the maximum load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the first compressor is started, and the start order of the first compressor is adjacent to and behind the target compressor.

[0038] In an optional implementation, the adjustment unit is used to obtain a third tank pressure interval corresponding to the minimum load value of the target compressor; in response to the lower limit value of the target tank pressure interval being smaller than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the target compressor is shut down.

[0039] In an optional implementation, the device further includes:

[0040] a signal output module, configured to output a load increase signal in response to the tank pressure signal value continuously increasing to the upper limit value of the target tank pressure interval, wherein the load increase signal is used to instruct a target compressor to increase its load, wherein the target compressor is a compressor that has been started and has been started most recently in the compressor group;

[0041] The signal output module is further configured to output a load reduction signal in response to the tank pressure signal value continuously decreasing to a lower limit value of the target tank pressure range, wherein the load reduction signal is configured to instruct the target compressor to reduce its load.

[0042] On the other hand, a terminal is provided, which includes a processor and a memory, wherein the memory is used to store at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the operations performed in the method for regulating the load of a reciprocating compressor unit in an embodiment of the present application.

[0043] On the other hand, a computer-readable storage medium is provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor to implement the operations performed in the method for adjusting the load of a reciprocating compressor unit in an embodiment of the present application.

[0044] The beneficial effects of the technical solution provided by the embodiment of the present application are:

[0045] In an embodiment of the present application, a method for adjusting the load of a reciprocating compressor unit is provided. By setting tank pressure intervals corresponding to multiple load values ​​of each compressor, the load status of each compressor in the compressor unit can be adjusted step by step in a timely manner according to the current tank pressure signal value. No human intervention is required, the probability of misoperation is reduced, reliability and accuracy are improved, and safety hazards are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 It is a schematic diagram of an implementation environment of a method for adjusting the load of a reciprocating compressor unit provided in an embodiment of the present application;

[0048] Figure 2 is a flow chart of a method for adjusting the load of a reciprocating compressor unit provided according to an embodiment of the present application;

[0049] Figure 3 It is a logic block diagram of load regulation of a reciprocating compressor unit provided according to an embodiment of the present application;

[0050] Figure 4 It is a block diagram of a reciprocating compressor unit load regulating device provided according to an embodiment of the present application;

[0051] Figure 5 It is a structural block diagram of a terminal provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0054] The following introduces the terms that appear in the embodiments of the present application.

[0055] DCS, Distributed Control System, is a new generation of instrument control system based on microprocessors, adopting the design principles of decentralized control functions, centralized display operations, and taking into account the design principles of division and autonomy and comprehensive coordination. Distributed control system is referred to as DCS, which can also be directly translated as "distributed control system" or "distributed computer control system". It adopts the basic design concept of decentralized control, centralized operation and management, and adopts a multi-level hierarchical, cooperative and autonomous structure. Its main features are its centralized management and decentralized control. At present, DCS has been widely used in various industries such as electricity, metallurgy, and petrochemicals.

[0056] The following introduces the implementation environment of the method for adjusting the load of a reciprocating compressor unit provided in the embodiment of the present application. Figure 1 Schematic diagram of the implementation environment of the method for adjusting the load of a reciprocating compressor unit provided in accordance with an embodiment of the present application. Figure 1 The implementation environment includes a terminal 101 and a reciprocating compressor unit 102 .

[0057] The terminal 101 and the reciprocating compressor unit 102 can be directly or indirectly connected via wired or wireless communication, which is not limited in the present application.

[0058] Optionally, the terminal 101 is a smart phone, a tablet computer, a laptop computer, a desktop computer, etc., but is not limited thereto. The terminal 101 is installed and runs an application that supports the control of the reciprocating compressor unit 102, which can monitor the real-time parameters of the reciprocating compressor unit 102 and control the start and stop status of each compressor unit in the reciprocating compressor unit. Optionally, the application is a DCS (Distributed Control System) or other automated control system, which is not limited in the embodiments of the present application.

[0059] Optionally, the reciprocating compressor unit 102 includes multiple reciprocating compressors, and a single reciprocating compressor can be load regulated by using clearance adjustment and unloader in coordination, and the load regulation range is relatively large, and the load of a single compressor is adjusted step by step from 25%, 50%, 75% to 100%. Of course, more adjustment levels can be divided, and the embodiment of the present application does not limit this.

[0060] In an embodiment of the present application, a reciprocating compressor unit includes a plurality of reciprocating compressors, and each reciprocating compressor is operated in parallel. When the gas volume is low, only one compressor is in operation; as the gas volume increases, when one compressor is insufficient to meet the gas volume demand, the number of operating compressors is increased one by one; until the gas volume approaches the peak value, the entire compressor unit is put into use. The capacity of the reciprocating compressor is generally designed according to the maximum volume flow condition required by the process system. However, during actual operation, due to changes in operating conditions (such as component changes, ambient temperature, volume displacement and flash evaporation caused by material in and out, etc.), the evaporation gas volume in the storage tank fluctuates frequently, and the actual demand for the reciprocating compressor is often less than the design value. Therefore, the reciprocating compressor does not always operate at full load, which puts forward the requirement of load regulation for the compressor. The embodiment of the present application provides a method for regulating the load of a reciprocating compressor unit, which can timely and step by step adjust the load status of each compressor in the compressor unit according to the current tank pressure signal value, without the need for manual intervention, reducing the probability of misoperation, improving reliability and accuracy, and avoiding safety hazards. See. Figure 2 As shown, Figure 2 1 is a flow chart of a method for adjusting the load of a reciprocating compressor unit provided according to an embodiment of the present application. Figure 2 As shown, in the embodiment of the present application, the application in the terminal is used as an example for explanation. The method for adjusting the load of the reciprocating compressor unit includes the following steps:

[0061] 201. The terminal obtains a target tank pressure interval to which a current tank pressure signal value belongs. One tank pressure interval corresponds to a load value of a compressor.

[0062] In the embodiment of the present application, the load of each compressor is divided into multiple gears, and each compressor corresponds to multiple load values, such as 25%, 50%, 75% and 100%. Then the pressure of the storage tank is divided into several tank pressure intervals, and each tank pressure interval corresponds to a load value of a compressor.

[0063] For example, taking a compressor unit containing three parallel reciprocating compressors as an example, the corresponding relationship between the load value and the tank pressure range is shown in Table 1.

[0064] Table 1

[0065]

[0066] As shown in Table 1, the starting sequence of Compressor A, Compressor B, and Compressor C is: Compressor A first, Compressor B second, and Compressor C third. Ya represents the trigger value for starting Compressor A, that is, when the current tank pressure signal value exceeds Ya, Compressor A is started. Yb represents the trigger value for starting Compressor B, that is, when the current tank pressure signal value exceeds Yb, Compressor B is started. Yc represents the trigger value for starting Compressor C, that is, when the current tank pressure signal value exceeds Yc, Compressor C is started. Na represents the trigger value for shutting down Compressor A, that is, when the current tank pressure signal value is less than Na, Compressor A is shut down. Nb represents the trigger value for shutting down Compressor B, that is, when the current tank pressure signal value is less than Nb, Compressor B is shut down. Nc represents the trigger value for shutting down Compressor C, that is, when the current tank pressure signal value is less than Nc, Compressor C is shut down. The load values corresponding to each compressor are 25%, 50%, 75%, and 100%.

[0067] Ya < U1 < U2 < U3 < Yb < U4 < U5 < U6 < Yc < U7 < U8 < U9 represents the upper limit values of the tank pressure intervals; Na < D1 < D2 < D3 < Nb < D4 < D5 < D6 < Nc < D7 < D8 < D9 represents the lower limit values of the tank pressure intervals. Additionally, Ni < Yi, where i = a, b, c, represents that the lower limit value of the tank pressure interval corresponding to the minimum load value of the compressor with a later starting sequence is less than the upper limit value of the tank pressure interval corresponding to the maximum load value of the adjacent and earlier starting compressor. That is, only when the current tank pressure signal value exceeds the upper limit value of the tank pressure interval corresponding to the maximum load value of the compressor will a new compressor be started. It should be noted that Dj < Uj, where j = 1, 2, 3... 9, represents that the two tank pressure intervals corresponding to two adjacent load values of the same compressor have an intersection but do not completely overlap, to prevent the compressor from frequently increasing or decreasing the load when the current tank pressure signal value fluctuates near the upper (lower) limit.

[0068] 202. The terminal determines the target load status information according to the target tank pressure interval, and the target load status information is used to indicate the target start / stop status and target load value of each compressor in the compressor unit.

[0069] In the embodiment of the present application, the terminal can determine the target start / stop status and target load value that each compressor should be in under the current tank pressure signal value according to the determined target tank pressure interval.

[0070] For example, if the target tank pressure interval is Na-U1, compressor A is in the start-up state, and the load value is 25%; compressors B and C are in the stop state. For another example, if the target tank pressure interval is D4-U5, compressor A is in the start-up state, and the load value is 100%; compressor B is in the start-up state, and the load value is 50%; compressor C is in the stop state. For another example, if the target tank pressure interval is D8-U9, compressor A is in the start-up state, and the load value is 100%; compressor B is in the start-up state, and the load value is 100%; compressor C is in the start-up state, and the load value is 75%.

[0071] 203. In response to the target load state information not being consistent with the actual load state information, the terminal adjusts the load value and start / stop state of each compressor step by step according to the target load state information, where the actual load state information is used to indicate the actual start / stop state and actual load value of each compressor.

[0072] In the embodiment of the present application, after obtaining the above target load status information, the terminal can determine whether the target load value and target start / stop status of each compressor indicated by the target load status information are consistent with the actual start / stop status and actual load value of each compressor indicated by the actual load status information. If they are consistent, the terminal maintains the existing load status of each compressor unchanged; if the target load value of any compressor is higher than the actual load value, the terminal implements a load increase operation to increase the actual load value to the target load value; if the target load value of any compressor is lower than the actual load value, the terminal implements a load reduction operation to reduce the actual load value to the target load value.

[0073] When the terminal adjusts the load value and start / stop state of each compressor step by step, the terminal starts the adjustment from the target compressor, which is the compressor that has been started and started most recently in the compressor group. Accordingly, in response to the target load state information not being consistent with the actual load state information, the terminal first obtains the current load value of the target compressor. Then, according to the target load state information, the terminal adjusts the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in the start order step by step from the current load value.

[0074] Optionally, when the target start / stop state of each compressor indicated by the target load state information is the same as the actual start / stop state indicated by the actual load state information, and the target load value of the target compressor is greater than the actual load value. The terminal first obtains the first tank pressure interval corresponding to the current load value of the target compressor. In response to the upper limit value of the target tank pressure interval being greater than the upper limit value of the first tank pressure interval, and not greater than the upper limit value of the second tank pressure interval, the terminal increases the load value of the target compressor step by step from the current load value, and the second tank pressure interval is the tank pressure interval corresponding to the highest load value of the target compressor.

[0075] For example, the target compressor is compressor A, the target tank pressure range is D2-U3, the first tank pressure range is Na-U1, and the second tank pressure range is D3-Yb. Then the actual load value of compressor A is 25%, and the target load value is 75%. Since U1 < U3 < Yb, the terminal first adjusts the load value of compressor A from 25% to 50%, and then to 75%.

[0076] Optionally, when the target start / stop states of each compressor indicated by the target load status information are the same as the actual start / stop states indicated by the actual load status information, and the target load value of the target compressor is less than the actual load value. The terminal first obtains the first tank pressure range corresponding to the current load value of the target compressor. Then, in response to the lower limit value of the target tank pressure range being less than the lower limit value of the first tank pressure range and not less than the lower limit value of the third tank pressure range, the terminal can gradually reduce the load value of the target compressor from the current load value. The third tank pressure range is the tank pressure range corresponding to the lowest load value of the target compressor.

[0077] For example, the target compressor is compressor B, the target tank pressure range is D4-U5, the first tank pressure range is D6-Yc, and the third tank pressure range is Nb-U4. Then the actual load value of compressor B is 100%, and the target load value is 50%. Since Nb < D4 < D6, the terminal first adjusts the load value of compressor B from 100% to 75%, and then to 50%.

[0078] Optionally, when the target start / stop states of each compressor indicated by the target load status information are not the same as the actual start / stop states indicated by the actual load status information, and the target load value of the target compressor is greater than the actual load value. The terminal first obtains the second tank pressure range corresponding to the highest load value of the target compressor. In response to the upper limit value of the target tank pressure range being greater than the upper limit value of the second tank pressure range, the terminal can gradually increase the load value of the target compressor from the current load value and start the first compressor. The starting order of the first compressor is adjacent to and behind that of the target compressor.

[0079] For example, the target compressor is compressor B, the target tank pressure range is D7-U8, the first tank pressure range is D4-U5, and the second tank pressure range is D6-Yc. The actual load value of compressor B is 50%, and the target load value is 100%. The actual start / stop state of compressor C is the stop state, the target start / stop state is the start state, and the target load value is 50%. Since U8 > Yc, the terminal adjusts the load value of compressor B from 50% to 75%, then from 75% to 100%. Then the terminal starts compressor C. Finally, the terminal adjusts the load value of compressor C from 25% to 50%.

[0080] Optionally, when the target start / stop state of each compressor indicated by the target load state information is different from the actual start / stop state indicated by the actual load state information, and the target load value of the target compressor is less than the actual load value. The terminal first obtains the third tank pressure interval corresponding to the lowest load value of the target compressor. In response to the lower limit value of the target tank pressure interval being less than the lower limit value of the third tank pressure interval, the terminal can gradually reduce the load value of the target compressor from the current load value and then turn off the target compressor.

[0081] For example, the target compressor is Compressor B, the target tank pressure interval is D1-U2, the first tank pressure interval is D4-U5, and the third tank pressure interval is Nb-U4. The actual load value of Compressor B is 50%, the actual start / stop state is the start state, and the target start / stop state is the stop state. The actual start / stop state of Compressor A is the start state, the actual load value is 100%, and the target load value is 50%. Since D1 < Nb, the terminal adjusts the load value of Compressor B from 50% to 25%, then turns off Compressor B, then the terminal starts Compressor C, and finally the terminal adjusts the load value of Compressor C from 25% to 50%.

[0082] 204. In response to the tank pressure signal value continuously rising to the upper limit value of the target tank pressure interval, output an increased load signal, where the increased load signal is used to indicate that the target compressor increases the load, and the target compressor is the compressor that has been started and was most recently started in the compressor unit.

[0083] In the embodiment of the present application, for the target compressor, when the target compressor is at the target load value corresponding to the target tank pressure interval, if the tank pressure continuously rises, once the tank pressure signal value reaches the upper limit value of the target tank pressure interval, the terminal outputs an increased load signal, and through the increased load signal, it indicates that the target compressor changes the clearance volume size and / or the opening and closing state of the unloader until the load value of the target compressor is adjusted to an appropriate size, that is, the tank pressure is maintained within the tank pressure interval corresponding to the adjusted load value.

[0084] 205. In response to the tank pressure signal value continuously decreasing to the lower limit value of the target tank pressure interval, the terminal outputs a decreased load signal, where the decreased load signal is used to indicate that the target compressor reduces the load.

[0085] In the embodiment of the present application, for the target compressor, when the target compressor is at the target load value corresponding to the target tank pressure interval, if the tank pressure continuously decreases, once the tank pressure signal value reaches the lower limit value of the target tank pressure interval, the terminal outputs a decreased load signal, and through the decreased load signal, it indicates that the target compressor changes the clearance volume size and / or the opening and closing state of the unloader until the load value of the target compressor is adjusted to an appropriate size, that is, the tank pressure is maintained within the tank pressure interval corresponding to the adjusted load value.

[0086] It should be noted that if the load value of a compressor is adjusted to full load, that is, it continues to rise when it reaches the highest load value, the terminal instructs the new compressor to enter the startup state and adjusts step by step from the 25% load value; if the load value of the compressor decreases step by step as the tank pressure decreases, and the tank pressure continues to decrease when the load value decreases step by step to 25%, the operation of the compressor is stopped and the compressor is set to the shutdown state.

[0087] It should be noted that, in order to make the method for adjusting the load of the reciprocating compressor unit described in the above steps 201 to 205 easier to understand, see Figure 3 As shown, Figure 3 1 is a logic block diagram of load regulation of a reciprocating compressor unit provided according to an embodiment of the present application. Figure 3 As shown, the reciprocating compressor unit includes three parallel reciprocating compressors: compressor A, compressor B and compressor C. The parameters shown in the figure are shown in Table 1.

[0088] It should be noted that the method for adjusting the load of the reciprocating compressor unit provided in the embodiment of the present application realizes automatic control, improves the level of automation control of the process system, and provides a guarantee for the safe and stable operation of the storage tank. In addition, since the adjacent tank pressure intervals intersect with each other and do not completely overlap, the compressor unit is prevented from frequently operating or even starting and stopping near a certain tank pressure control point, thereby extending the use effect and life of the compressor. The scheme provided in the embodiment of the present application is very flexible, and the lower limit and upper limit of each tank pressure interval can be set and adjusted according to actual needs, such as limiting the operating time of the transition load gear that cannot be operated for a long time, so as to adapt to the performance of different compressors. Finally, the scheme provided in the embodiment of the present application is widely applicable, and can be used to control the compressor unit control system of the low-temperature atmospheric pressure storage tank and tank area pressure of liquefied natural gas, liquefied petroleum gas, liquid ethylene, liquid ammonia, etc., and is also applicable to the compressor unit control scheme of the process system with similar pressure response characteristics, and the embodiment of the present application will no longer be described one by one.

[0089] It should be noted that in order to verify the effect of the method for adjusting the load of the reciprocating compressor unit provided in this application, the method for adjusting the load of the reciprocating compressor unit was implemented at a certain liquefied natural gas receiving station. Before implementation, the adjustment and equipment start and stop of the reciprocating compressor unit of the liquefied natural gas receiving station had always been manually controlled by the operator, with a large workload and unstable tank pressure control. After implementation, due to the rapid increase in tank pressure during unloading, the three compressors were put into operation one after another. After the unloading was completed, the tank pressure gradually dropped, the load of the compressor unit steadily decreased, and one of the compressors was automatically shut down. It can be seen that the automatic control of the compressor load adjustment has been successfully realized, the entire load adjustment process is well controlled, and the expected purpose has been achieved.

[0090] In an embodiment of the present application, a method for adjusting the load of a reciprocating compressor unit is provided. By setting tank pressure intervals corresponding to multiple load values ​​of each compressor, the load status of each compressor in the compressor unit can be adjusted step by step in a timely manner according to the current tank pressure signal value. No human intervention is required, the probability of misoperation is reduced, reliability and accuracy are improved, and safety hazards are avoided.

[0091] Figure 4 is a block diagram of a reciprocating compressor load adjustment device provided according to an embodiment of the present application. The device is used to perform the steps of the above method. Figure 4 The device includes: an acquisition module 401, a determination module 402 and an adjustment module 403.

[0092] An acquisition module 401 is used to acquire a target tank pressure interval to which the current tank pressure signal value belongs, where one tank pressure interval corresponds to one load value of one compressor;

[0093] A determination module 402, configured to determine target load state information according to the target tank pressure range, wherein the target load state information is used to indicate a target start / stop state and a target load value of each compressor in the compressor group;

[0094] The adjustment module 403 is used to adjust the load value and start / stop status of each compressor step by step according to the target load status information in response to the target load status information not being consistent with the actual load status information, wherein the actual load status information is used to indicate the actual start / stop status and actual load value of each compressor.

[0095] In an optional implementation, the adjustment module 403 includes:

[0096] an acquisition unit, configured to acquire a current load value of a target compressor in response to the target load state information not being consistent with the actual load state information, wherein the target compressor is a compressor in the compressor group that has been started and has been started most recently;

[0097] The adjustment unit is used to adjust the load value of the target compressor, the start / stop state of the target compressor, and at least one of the start / stop states of other compressors whose start order is adjacent to the target compressor step by step from the current load value according to the target load state information.

[0098] In an optional implementation, the adjustment unit is used to obtain a first tank pressure interval corresponding to a current load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the first tank pressure interval and not greater than an upper limit value of a second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the second tank pressure interval is a tank pressure interval corresponding to the highest load value of the target compressor.

[0099] In an optional implementation, the adjustment unit is used to obtain a first tank pressure interval corresponding to the current load value of the target compressor; in response to the lower limit value of the target tank pressure interval being less than the lower limit value of the first tank pressure interval and not less than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the third tank pressure interval is the tank pressure interval corresponding to the lowest load value of the target compressor.

[0100] In an optional implementation, the adjustment unit is used to obtain a second tank pressure interval corresponding to the maximum load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the first compressor is started, and the start order of the first compressor is adjacent to and behind the target compressor.

[0101] In an optional implementation, the adjustment unit is used to obtain a third tank pressure interval corresponding to the minimum load value of the target compressor; in response to the lower limit value of the target tank pressure interval being smaller than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the target compressor is shut down.

[0102] In an optional implementation, the device further includes:

[0103] a signal output module, configured to output a load increase signal in response to the tank pressure signal value continuously increasing to the upper limit value of the target tank pressure interval, wherein the load increase signal is used to instruct a target compressor to increase its load, wherein the target compressor is a compressor that has been started and has been started most recently in the compressor group;

[0104] The signal output module is further configured to output a load reduction signal in response to the tank pressure signal value continuously decreasing to a lower limit value of the target tank pressure range, wherein the load reduction signal is configured to instruct the target compressor to reduce its load.

[0105] In an embodiment of the present application, a method for adjusting the load of a reciprocating compressor unit is provided. By setting tank pressure intervals corresponding to multiple load values ​​of each compressor, the load status of each compressor in the compressor unit can be adjusted step by step in a timely manner according to the current tank pressure signal value. No human intervention is required, the probability of misoperation is reduced, reliability and accuracy are improved, and safety hazards are avoided.

[0106] It should be noted that: the reciprocating compressor load regulating device provided in the above embodiment only uses the division of the above functional modules as an example to illustrate when adjusting the load of the reciprocating compressor unit. In actual applications, the above functional distribution can be completed by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the reciprocating compressor load regulating device provided in the above embodiment and the reciprocating compressor load regulating method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0107] Figure 5 This is a block diagram of a terminal 500 provided according to an embodiment of the present application. The terminal 500 may be a portable mobile terminal, such as a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 player (Moving Picture Experts Group Audio Layer IV), a laptop computer or a desktop computer. The terminal 500 may also be referred to as a user device, a portable terminal, a laptop terminal, a desktop terminal or other names.

[0108] Typically, the terminal 500 includes a processor 501 and a memory 502 .

[0109] The processor 501 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 501 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 501 may also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 501 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 501 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0110] The memory 502 may include one or more computer-readable storage media, which may be non-transitory. The memory 502 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 502 is used to store at least one computer program, which is used to be executed by the processor 501 to implement the method for adjusting the load of the reciprocating compressor unit provided in the method embodiment of the present application.

[0111] In some embodiments, the terminal 500 may also optionally include: a peripheral device interface 503 and at least one peripheral device. The processor 501, the memory 502 and the peripheral device interface 503 may be connected via a bus or a signal line. Each peripheral device may be connected to the peripheral device interface 503 via a bus, a signal line or a circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 504, a display screen 505, a camera assembly 506, an audio circuit 507, a positioning assembly 508 and a power supply 509.

[0112] The peripheral device interface 503 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 501 and the memory 502. In some embodiments, the processor 501, the memory 502, and the peripheral device interface 503 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 501, the memory 502, and the peripheral device interface 503 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0113] The radio frequency circuit 504 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 504 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 504 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 504 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The radio frequency circuit 504 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 504 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0114] The display screen 505 is used to display a UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 505 is a touch display screen, the display screen 505 also has the ability to collect touch signals on the surface or above the surface of the display screen 505. The touch signal can be input to the processor 501 as a control signal for processing. At this time, the display screen 505 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 505 can be one, arranged on the front panel of the terminal 500; in other embodiments, the display screen 505 can be at least two, respectively arranged on different surfaces of the terminal 500 or in a folding design; in other embodiments, the display screen 505 can be a flexible display screen, arranged on a curved surface or a folding surface of the terminal 500. Even, the display screen 505 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 505 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode, organic light-emitting diode).

[0115] The camera assembly 506 is used to capture images or videos. Optionally, the camera assembly 506 includes a front camera and a rear camera. Typically, the front camera is arranged on the front panel of the terminal, and the rear camera is arranged on the back of the terminal. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize the panoramic shooting and VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 506 may also include a flash. The flash can be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0116] The audio circuit 507 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 501 for processing, or input them into the radio frequency circuit 504 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 500. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 501 or the radio frequency circuit 504 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 507 may also include a headphone jack.

[0117] The positioning component 508 is used to locate the current geographical location of the terminal 500 to implement navigation or LBS (Location Based Service). The positioning component 508 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system or Russia's Galileo system.

[0118] The power supply 509 is used to power various components in the terminal 500. The power supply 509 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 509 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery charged through a wired line, and a wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0119] In some embodiments, the terminal 500 further includes one or more sensors 510 , including but not limited to: an acceleration sensor 511 , a gyroscope sensor 512 , a pressure sensor 513 , a fingerprint sensor 514 , an optical sensor 515 , and a proximity sensor 516 .

[0120] The acceleration sensor 511 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established by the terminal 500. For example, the acceleration sensor 511 can be used to detect the components of gravity acceleration on the three coordinate axes. The processor 501 can control the display screen 505 to display the user interface in a horizontal view or a vertical view according to the gravity acceleration signal collected by the acceleration sensor 511. The acceleration sensor 511 can also be used to collect game or user motion data.

[0121] The gyro sensor 512 can detect the body direction and rotation angle of the terminal 500, and the gyro sensor 512 can cooperate with the acceleration sensor 511 to collect the user's 3D actions on the terminal 500. The processor 501 can implement the following functions based on the data collected by the gyro sensor 512: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization during shooting, game control, and inertial navigation.

[0122] The pressure sensor 513 can be set on the side frame of the terminal 500 and / or the lower layer of the display screen 505. When the pressure sensor 513 is set on the side frame of the terminal 500, it can detect the user's holding signal of the terminal 500, and the processor 501 performs left and right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 513. When the pressure sensor 513 is set on the lower layer of the display screen 505, the processor 501 controls the operability controls on the UI interface according to the user's pressure operation on the display screen 505. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0123] The fingerprint sensor 514 is used to collect the user's fingerprint, and the processor 501 identifies the user's identity based on the fingerprint collected by the fingerprint sensor 514, or the fingerprint sensor 514 identifies the user's identity based on the collected fingerprint. When the user's identity is identified as a trusted identity, the processor 501 authorizes the user to perform relevant sensitive operations, including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings. The fingerprint sensor 514 can be set on the front, back, or side of the terminal 500. When a physical button or a manufacturer logo is set on the terminal 500, the fingerprint sensor 514 can be integrated with the physical button or the manufacturer logo.

[0124] The optical sensor 515 is used to collect the ambient light intensity. In one embodiment, the processor 501 can control the display brightness of the display screen 505 according to the ambient light intensity collected by the optical sensor 515. Specifically, when the ambient light intensity is high, the display brightness of the display screen 505 is increased; when the ambient light intensity is low, the display brightness of the display screen 505 is reduced. In another embodiment, the processor 501 can also dynamically adjust the shooting parameters of the camera component 506 according to the ambient light intensity collected by the optical sensor 515.

[0125] The proximity sensor 516, also called a distance sensor, is usually disposed on the front panel of the terminal 500. The proximity sensor 516 is used to collect the distance between the user and the front of the terminal 500. In one embodiment, when the proximity sensor 516 detects that the distance between the user and the front of the terminal 500 is gradually decreasing, the processor 501 controls the display screen 505 to switch from the screen-on state to the screen-off state; when the proximity sensor 516 detects that the distance between the user and the front of the terminal 500 is gradually increasing, the processor 501 controls the display screen 505 to switch from the screen-off state to the screen-on state.

[0126] Those skilled in the art will understand that Figure 5 The structure shown in the figure does not constitute a limitation on the terminal 500, and the terminal 500 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0127] An embodiment of the present application also provides a computer-readable storage medium, which is applied to a terminal, and stores at least one computer program in the computer-readable storage medium. The at least one computer program is loaded and executed by a processor to implement the operations performed by the terminal in the method for adjusting the load of a reciprocating compressor unit in the above-mentioned embodiment.

[0128] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0129] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for adjusting the load of a reciprocating compressor unit, characterized in that: The method comprises: Get the target tank pressure interval to which the current tank pressure signal value belongs. One tank pressure interval corresponds to one load value of one compressor. The lower limit of the tank pressure interval corresponding to the lowest load value of the compressor in the later start-up order is smaller than the upper limit of the tank pressure interval corresponding to the highest load value of the compressor in the adjacent start-up order. The two tank pressure intervals corresponding to two adjacent load values ​​of the same compressor are intersected but not completely overlapped. Determining target load state information according to the target tank pressure range, wherein the target load state information is used to indicate the target start / stop state and target load value of each compressor in the compressor group; In response to the target load state information not being consistent with the actual load state information, obtaining a current load value of a target compressor, wherein the target compressor is a compressor in the compressor group that has been started and has been started most recently; According to the target load state information, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in the start order is adjusted step by step from the current load value, and the actual load state information is used to indicate the actual start / stop state and actual load value of each compressor; In response to the tank pressure signal value continuously increasing to the upper limit value of the target tank pressure range, outputting a load increase signal, wherein the load increase signal is used to instruct a target compressor to increase the load, wherein the target compressor is a compressor that has been started and recently started in the compressor group; In response to the tank pressure signal value continuously decreasing to the lower limit value of the target tank pressure range, outputting a load reduction signal, wherein the load reduction signal is used to instruct the target compressor to reduce the load; The step of adjusting, based on the target load state information, step by step from the current load value, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in the start-up order comprises: Acquire a first tank pressure interval corresponding to the current load value of the target compressor, wherein the target start / stop state of each compressor indicated by the target load state information is the same as the actual start / stop state indicated by the actual load state information, and the target load value of the target compressor is greater than the actual load value; In response to the upper limit value of the target tank pressure interval being greater than the upper limit value of the first tank pressure interval and not greater than the upper limit value of the second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, the second tank pressure interval being the tank pressure interval corresponding to the highest load value of the target compressor; Acquire a first tank pressure interval corresponding to the current load value of the target compressor, when the target start / stop state of each compressor indicated by the target load state information is the same as the actual start / stop state indicated by the actual load state information, the target load value of the target compressor is less than the actual load value; In response to the lower limit value of the target tank pressure interval being less than the lower limit value of the first tank pressure interval and not less than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the third tank pressure interval is the tank pressure interval corresponding to the lowest load value of the target compressor.

2. The method according to claim 1, characterized in that The step of adjusting, based on the target load state information, step by step from the current load value, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in the start-up order comprises: Acquire a second tank pressure interval corresponding to the maximum load value of the target compressor; In response to the upper limit value of the target tank pressure interval being greater than the upper limit value of the second tank pressure interval, the load value of the target compressor is gradually increased from the current load value, and the first compressor is started, and the start order of the first compressor is adjacent to and later than that of the target compressor.

3. The method according to claim 1, characterized in that The step of adjusting, based on the target load state information, step by step from the current load value, at least one of the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in the start-up order comprises: Obtaining a third tank pressure interval corresponding to the target compressor minimum load value; In response to the lower limit value of the target tank pressure interval being smaller than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the target compressor is turned off.

4. A reciprocating compressor load regulating device, characterized in that: The device comprises: An acquisition module is used to acquire a target tank pressure interval to which the current tank pressure signal value belongs. One tank pressure interval corresponds to one load value of one compressor. The lower limit value of the tank pressure interval corresponding to the lowest load value of the compressor in the later start-up order is smaller than the upper limit value of the tank pressure interval corresponding to the highest load value of the compressor in the adjacent and earlier start-up order. The two tank pressure intervals corresponding to two adjacent load values ​​of the same compressor are intersected but not completely overlapped. A determination module, used to determine target load state information according to the target tank pressure range, wherein the target load state information is used to indicate a target start / stop state and a target load value of each compressor in the compressor group; an adjustment module, configured to adjust the load value and start / stop state of each compressor step by step according to the target load state information in response to the target load state information not being consistent with the actual load state information, wherein the actual load state information is used to indicate the actual start / stop state and actual load value of each compressor; The adjustment module comprises: an acquisition unit, configured to acquire a current load value of a target compressor in response to the target load state information not being consistent with the actual load state information, wherein the target compressor is a compressor in the compressor group that has been started and has been started most recently; an adjusting unit, configured to adjust step by step from the current load value the load value of the target compressor, the start / stop state of the target compressor, and the start / stop state of other compressors adjacent to the target compressor in a start order; The adjustment unit is used to obtain a first tank pressure interval corresponding to a current load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the first tank pressure interval and not greater than an upper limit value of a second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the second tank pressure interval is a tank pressure interval corresponding to a maximum load value of the target compressor; The adjustment unit is used to obtain a first tank pressure interval corresponding to a current load value of the target compressor, the target start / stop state of each compressor indicated by the target load state information is the same as the actual start / stop state indicated by the actual load state information, and the target load value of the target compressor is greater than the actual load value; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the first tank pressure interval and not greater than an upper limit value of a second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the second tank pressure interval is a tank pressure interval corresponding to a maximum load value of the target compressor; The adjustment unit is used to obtain a first tank pressure interval corresponding to a current load value of the target compressor, when the target start / stop state of each compressor indicated by the target load state information is the same as the actual start / stop state indicated by the actual load state information, the target load value of the target compressor is less than the actual load value; in response to a lower limit value of the target tank pressure interval being less than a lower limit value of the first tank pressure interval and not less than a lower limit value of a third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the third tank pressure interval is a tank pressure interval corresponding to a minimum load value of the target compressor; a signal output module, configured to output a load increase signal in response to the tank pressure signal value continuously increasing to the upper limit value of the target tank pressure interval, wherein the load increase signal is used to instruct a target compressor to increase its load, wherein the target compressor is a compressor that has been started and has been started most recently in the compressor group; The signal output module is further configured to output a load reduction signal in response to the tank pressure signal value continuously decreasing to a lower limit value of the target tank pressure range, wherein the load reduction signal is configured to instruct the target compressor to reduce its load.

5. The device according to claim 4, characterized in that The adjustment unit is used to obtain a second tank pressure interval corresponding to the maximum load value of the target compressor; in response to an upper limit value of the target tank pressure interval being greater than an upper limit value of the second tank pressure interval, the load value of the target compressor is increased step by step from the current load value, and the first compressor is started, and the starting order of the first compressor is adjacent to and behind the target compressor.

6. The device according to claim 4, characterized in that The adjustment unit is used to obtain the third tank pressure interval corresponding to the minimum load value of the target compressor; in response to the lower limit value of the target tank pressure interval being smaller than the lower limit value of the third tank pressure interval, the load value of the target compressor is gradually reduced from the current load value, and the target compressor is turned off.

7. A terminal, characterized in that: The terminal comprises a processor and a memory, wherein the memory is used to store at least one computer program, and the at least one computer program is loaded by the processor and executes the method for adjusting the load of a reciprocating compressor unit according to any one of claims 1 to 3.

8. A storage medium, characterized in that: The storage medium is used to store at least one computer program, and the at least one computer program is used to execute the method for adjusting the load of a reciprocating compressor unit according to any one of claims 1 to 3.

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