Control method and device of compressed air system, electronic equipment and storage medium

Abstract

The application discloses a control method and device of a compressed air system, an electronic device and a storage medium. The method comprises the following steps: determining an operation parameter of an air compressor in the compressed air system according to at least one of a first pressure at a main pipe of a gas transmission pipe network and a flow of the gas transmission pipe network and an attribute parameter of the air compressor; and determining a pressure adjustment value of the gas transmission pipe network according to the first pressure, a second pressure at a user end of the gas transmission pipe network and a target pressure. The embodiment of the application can not only improve the stability of the operation of the compressed air system, but also improve the timeliness of the pressure control signal of the compressed air system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a control method and device of a compressed air system, an electronic device and a storage medium. BACKGROUND

[0002] In the battery production process, it is usually necessary to perform pneumatic conveying, maintenance, purging, instrument gas and other tasks based on compressed air. The compressed air required in the battery production process is provided by a compressed air system. In order to improve the quality of battery production, the stability and timeliness of the compressed air system are usually required to be high. In the related art, the compressed air system is prone to frequent start-stop of the air compressor in the compressed air system under the condition of large load fluctuation at the gas end, and the pressure control signal at the gas end has hysteresis, so that the stability and timeliness of the compressed air system are poor. SUMMARY

[0003] In view of the above problems, the present application provides a control method and device of a compressed air system, an electronic device and a storage medium, which can solve the technical problem of poor stability and timeliness of the compressed air system in the related art.

[0004] In a first aspect, the present application provides a control method of a compressed air system, comprising: determining an operating parameter of an air compressor in the compressed air system according to at least one of a first pressure at a main pipe of a gas transmission pipe network and a flow of the gas transmission pipe network, and an attribute parameter of the air compressor; and determining a pressure adjustment value of the gas transmission pipe network according to the first pressure, a second pressure of the gas transmission pipe network at a user end, and a target pressure.

[0005] In the technical scheme of the present application, according to at least one of the first pressure at the main pipe of the gas transmission pipe network and the flow of the gas transmission pipe network, and the attribute parameter of the air compressor, the operating parameter of the air compressor can be accurately obtained, the phenomenon of frequent start-stop of the compressed air system in the running process can be effectively alleviated, the stability of the compressed air system in the running process can be improved, and according to the first pressure, the second pressure of the gas transmission pipe network at the user end, and the target pressure, the pressure adjustment value of the gas transmission pipe network can be determined in time and effectively, and the timeliness of the pressure control signal of the compressed air system can be improved.

[0006] In some embodiments, the attribute parameter includes a gas production of the air compressor, and the operation parameter includes a start-up number of the air compressor; and the operation parameter of the air compressor is determined according to at least one of the first pressure of the main pipe of the gas pipeline network and the flow of the gas pipeline network, and the attribute parameter of the air compressor of the compressed air system, including: determining the start-up number of the air compressor matched with the maximum flow of the gas pipeline network according to the maximum flow of the gas pipeline network and the gas production of each air compressor. In this embodiment, the start-up number of the air compressor matched with the maximum flow of the gas pipeline network can be accurately determined according to the maximum flow of the gas pipeline network and the gas production of each air compressor, so that the compressed air matched with the gas demand of the user end can be provided, the additional consumption of energy can be reduced, and the utilization rate of energy can be improved.

[0007] In some embodiments, the air compressor includes a centrifugal air compressor and a variable frequency air compressor, and the start-up number of the air compressor matched with the maximum flow of the gas pipeline network is determined according to the maximum flow of the gas pipeline network and the gas production of each air compressor, including: respectively calculating the sum of the gas production of different number combinations of the centrifugal air compressor and the variable frequency air compressor; wherein the gas production of the centrifugal air compressor includes a minimum gas production and an adjusted gas production; and the start-up number corresponding to the case that the sum of the gas production is greater than or equal to the maximum flow of the gas pipeline network is determined as the start-up number of the air compressor matched with the maximum flow.

[0008] In this embodiment, the start-up number of the air compressor matched with the maximum flow of the gas pipeline network can be accurately determined through the sum of the gas production of different number combinations of the centrifugal air compressor and the variable frequency air compressor, so that the phenomenon of frequent start-up and stop of the air compressor in the air compression system can be reduced, and the utilization rate of the compressed air energy can be improved.

[0009] In some embodiments, the operation parameter of the air compressor is determined according to at least one of the first pressure of the main pipe of the gas pipeline network and the flow of the gas pipeline network, and the attribute parameter of the air compressor of the compressed air system, and further includes: determining the start-up number or the shutdown number of the air compressor matched with the user end according to at least one of the first pressure, the flow of the gas pipeline network, the gas production of the currently running air compressor, and the inlet valve opening degree of each air compressor. In this embodiment, the start-up number or the shutdown number of the air compressor matched with the user end can be accurately determined according to at least one of the first pressure, the flow of the gas pipeline network, the gas production of the currently running air compressor, and the inlet valve opening degree of each air compressor, so that the phenomenon of frequent start-up and stop of the air compressor can be reduced, and the utilization rate of the compressed air energy can be improved.

[0010] In some embodiments, the number of air compressors to be turned on is determined according to the first pressure and the flow of the gas pipeline network, and the gas output of the currently running air compressors, including: determining the number of air compressors to be turned on to match the target pressure when the first pressure is less than the target pressure; or determining the number of air compressors to be turned on to match the current required flow of the gas pipeline network when the current required flow of the gas pipeline network is greater than the system set flow. The system set flow is the maximum gas output of the currently running air compressors. In this embodiment, when the first pressure at the main pipe of the gas pipeline network is less than the target pressure, or when the flow of the gas pipeline network is greater than the system set flow, the number of air compressors to be turned on to match the target pressure or the target flow can be accurately determined, reducing the frequent start-stop of air compressors and improving the stability of the compressed air system.

[0011] In some embodiments, the number of air compressors to be turned off is determined according to the first pressure and the flow of the gas pipeline network, and the gas output of the currently running air compressors and the intake valve opening degree of each air compressor, including: determining the number of air compressors to be turned off to match the target pressure or the target flow when the first pressure is greater than or equal to the target pressure, the current required flow of the gas pipeline network is less than the system set flow, and the intake valve opening degree of each air compressor is less than the preset threshold. The system set flow is the maximum gas output of the currently running air compressors. In this embodiment, by determining that the first pressure is greater than or equal to the target pressure, the current required flow of the gas pipeline network is less than the system set flow, and the intake valve opening degree of each air compressor is less than the preset threshold, the number of air compressors to be turned off to match the target pressure or the target flow can be accurately determined, reducing the frequent start-stop of air compressors and improving the stability of the compressed air system.

[0012] In some embodiments, the pressure adjustment value of the gas pipeline network is determined according to the first pressure and the second pressure of the gas pipeline network at the user end, including: determining a first pressure adjustment value of the gas pipeline network according to a first difference between the first pressure and the target pressure; determining a first pressure set value as a product of a preset pressure compensation coefficient and the first pressure adjustment value; determining a second pressure set value of the gas pipeline network according to a second difference between the second pressure and the first pressure set value; and determining a target pressure adjustment value of the gas pipeline network as a sum of the first pressure set value and the second pressure set value. In this embodiment, by feeding back the first pressure at the main pipe of the gas pipeline network and the second pressure of the gas pipeline network at the user end to the control terminal of the compressed air in a timely manner, and based on the pressure compensation coefficient, the pressure adjustment value of the gas pipeline network can be accurately determined, and the pressure adjustment value of the user end can also be provided in a timely and effective manner, improving the user experience.

[0013] In some embodiments, the method further comprises: determining the adjustment parameter of the cooling fan according to operation data of the cooling fan in the cooling tower of the compressed air system; and determining the adjustment parameter of the cooling water pump according to operation data of the cooling water pump of the compressed air system. In this embodiment, the adjustment parameters of the cooling fan and the cooling water pump can be accurately obtained based on the operation data of the cooling fan and the cooling water pump, so that the air compressor of the compressed air system can be effectively and accurately provided with compressed air energy at a corresponding temperature.

[0014] In some embodiments, the operation data of the cooling fan includes the cooling water temperature and the running frequency of the cooling fan, and the adjustment parameter of the cooling fan is determined according to the operation data of the cooling fan in the cooling tower, including: in the case that the cooling water temperature in the cooling tower is greater than a set interval temperature and the running frequency of the cooling fan is greater than a set frequency, the number of cooling fans turned on is increased; in the case that the cooling water temperature in the cooling tower is less than or equal to the set interval temperature and the running frequency of the cooling fan is less than or equal to the set frequency, the number of cooling fans turned on is reduced.

[0015] In some embodiments, the operation data of the cooling water pump includes the supply and return water pressure difference of the cooling water and the running frequency of the cooling water pump, and the operation parameter of the cooling water pump is determined according to the operation data of the cooling water pump, including: in the case that the supply and return water pressure difference of the cooling water is less than a set supply and return water pressure difference and the running frequency of the cooling water pump is greater than a set frequency, the number of cooling water pumps turned on is increased; in the case that the supply and return water pressure difference of the cooling water is greater than or equal to the set supply and return water pressure difference, the running frequency of the cooling water pump is less than or equal to the set frequency, and the flow rate of each branch pipe at the user end is less than the maximum flow rate of the currently running cooling water pump, the number of cooling water pumps turned on is reduced.

[0016] In a second aspect, the embodiments of the present application implement a control device of a compressed air system, characterized in that the control device comprises: a first determining unit configured to determine an operation parameter of an air compressor in the compressed air system according to at least one of a first pressure at a main pipe of a gas transmission pipe network and a flow rate of the gas transmission pipe network, and an attribute parameter of the air compressor; and a second determining unit configured to determine a pressure adjustment value of the gas transmission pipe network according to the first pressure, a second pressure of the gas transmission pipe network at a user end, and a target pressure.

[0017] In a third aspect, the embodiments of the present application implement an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method according to the first aspect when executing the computer program.

[0018] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method in the first aspect.

[0019] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application and implement the same according to the contents of the specification, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to narrow the scope of the present application in any way. Instead, they are included to provide illustration of the preferred embodiments of the present application. In the drawings:

[0021] Figure 1 A flowchart of a control method of a compressed air system according to an embodiment of the present application is provided;

[0022] Figure 2 A flowchart of another control method of a compressed air system according to an embodiment of the present application is provided;

[0023] Figure 3 A flowchart of another control method of a compressed air system according to an embodiment of the present application is provided;

[0024] Figure 4 A flowchart of another control method of a compressed air system according to an embodiment of the present application is provided;

[0025] Figure 5 A flowchart of another control method of a compressed air system according to an embodiment of the present application is provided;

[0026] Figure 6 A schematic diagram of an architecture of a compressed air system according to an embodiment of the present application is provided;

[0027] Figure 7 A schematic diagram of a pressure control process of a compressed air system according to an embodiment of the present application is provided;

[0028] Figure 8 A schematic diagram of a control device of a compressed air system according to an embodiment of the present application is provided;

[0029] Figure 9 A schematic diagram of an electronic device according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "coupled" as used herein means the joining of two members together with one or more intervening members.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0033] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0035] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0036] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] At present, in the actual operation process of the compressed air system in the related art, in order to keep the user end gas pressure stable, the supply end of the compressed air system usually adopts a manual adjustment mode to increase the supply pressure. When the user end load is low during the operation of the compressed air system, the gas production and demand are not matched, which easily causes waste of gas energy of the gas using equipment. In addition, the air compressor of the compressed air system is prone to frequent start-stop under the condition that the load of the gas using end fluctuates greatly, and the pressure control signal of the gas using end has hysteresis, so that the stability and timeliness of the compressed air system are poor. In order to improve the quality of the battery, the vehicle component or other products that need compressed air supply production, the stability and response timeliness of the compressed air system are usually required to be high.

[0038] In order to improve the stability and timeliness of the compressed air system, the present application designs a control method of the compressed air system. The method determines the operation parameter of the air compressor according to at least one of the first pressure of the mother pipe of the gas transmission pipe network and the flow of the above gas transmission pipe network, and the attribute parameter of the air compressor in the compressed air system; determines the pressure adjustment value of the above gas transmission pipe network according to the first pressure, the second pressure of the gas transmission pipe network at the user end and the target pressure.

[0039] According to at least one of the first pressure of the mother pipe of the gas transmission pipe network and the flow of the above gas transmission pipe network, and the attribute parameter of the air compressor, the operation parameter of the air compressor can be accurately obtained, the phenomenon of frequent start-stop of the compressed air system during operation is effectively alleviated, the stability of the operation of the compressed air system is improved, and according to the first pressure, the second pressure of the gas transmission pipe network at the user end and the target pressure, the pressure adjustment value of the gas transmission pipe network can be determined in time and effectively, and the timeliness of the pressure control signal of the compressed air system can be improved.

[0040] But the embodiments of the present application are not limited to the above-mentioned application scenarios, and any application scenario using a compressed air system for air supply control can control the pressure and flow of air supply according to the method provided by the embodiments of the present application. The method not only can realize the stability and timeliness of the compressed air system, maximize the customer demand, but also can reduce the waste of energy, and has the advantages of small limitation, high universality and the like.

[0041] The specific process of the control method of the compressed air system of the present application will be described in detail below. Referring to Figure 1 the flow chart of the control method of the compressed air system, the method specifically includes the following steps:

[0042] Step S101: determining the operating parameter of the air compressor according to at least one of the first pressure at the main pipe of the gas transmission pipe network and the flow of the above gas transmission pipe network, and the attribute parameter of the air compressor in the compressed air system.

[0043] Specifically, the execution subject of the embodiments of the present application includes but is not limited to programmable logic controller (PLC), mobile phone, set top box, television, tablet computer, notebook computer, PC, wearable device and the like. The air compressor in the compressed air system of the present application includes but is not limited to high-pressure centrifugal air compressor, variable frequency air compressor and the like, as shown in Figure 6 The compressed air is injected into the gas storage tank from the dryer of the compressed air system, and the embodiments of the present application can determine the operating parameter of the air compressor according to at least one of the first pressure at the main pipe of the gas transmission pipe network (such as the pipe network pressure at P1 point of the main pipe) and the flow of the above gas transmission pipe network, and the attribute parameter (maximum gas production and adjusted gas production) of the air compressor in the compressed air system. It should be noted that the flow (instantaneous flow) of the gas transmission pipe network can be obtained by the flow detection device arranged at P1 point, and the operating parameter of the air compressor includes but is not limited to the operating number of the air compressor, the power and the like attribute parameters of the air compressor.

[0044] Step S102: determining the pressure adjustment value of the above gas transmission pipe network according to the above first pressure, the second pressure of the above gas transmission pipe network at the user end and the target pressure.

[0045] Specifically, as shown in Figure 6 For example, the second pressure includes the pipe network pressure detected at P2 point of the user end N. According to the pipe network pressure at P1 point of the main pipe and the pipe network pressure detected at P2 point of the user end N, and the target pressure set by the system, the pressure adjustment value of the gas transmission pipe network matched with the air pressure required by the user can be accurately output.

[0046] According to the first pressure at the parent pipe of the gas transmission pipe network, at least one of the flow of the gas transmission pipe network, and the attribute parameter of the air compressor, the running parameter of the air compressor can be accurately obtained, the phenomenon of frequent start and stop of the compressed air system in the running process can be effectively alleviated, the stability of the compressed air system in the running process can be improved, the pressure regulation value of the gas transmission pipe network can be determined in time and effectively according to the first pressure, the second pressure of the gas transmission pipe network at the user end, and the target pressure, and the timeliness of the pressure control signal of the compressed air system can be improved.

[0047] In another embodiment of the present application, as shown in Figure 2 The control method of the compressed air system specifically includes the following steps:

[0048] Step S201: determining the number of air compressors to be started according to the maximum flow of the gas transmission pipe network and the gas production of each air compressor.

[0049] Specifically, the maximum flow of the gas transmission pipe network includes the maximum value of the user end flow, that is, the maximum use amount of gas that can be used by the user end; the air compressor includes a piston air compressor, a screw air compressor, and a variable frequency air compressor, for example, the gas production of an air compressor is 1 cubic / minute, and the maximum flow (instantaneous flow) of the gas transmission pipe network is 2.8 cubic / minute, and at this time, three air compressors can be started.

[0050] In the embodiment of the present application, the number of air compressors to be started matched with the maximum flow can be accurately determined according to the maximum flow of the gas transmission pipe network and the gas production of each air compressor, so that the compressed air matched with the gas demand of the user end can be provided, the additional consumption of energy can be reduced, and the utilization rate of energy can be improved.

[0051] Step S202: determining the pressure regulation value of the gas transmission pipe network according to the first pressure, the second pressure of the gas transmission pipe network at the user end, and the target pressure.

[0052] The step S202 has been described in the foregoing, and will not be described here.

[0053] In one or more embodiments, the air compressor includes a centrifugal air compressor and a variable frequency air compressor, and the number of air compressors to be started matched with the maximum flow is determined according to the maximum flow of the gas transmission pipe network and the gas production of each air compressor, including:

[0054] The sum of the gas production of the centrifugal air compressor and the variable frequency air compressor in different number combinations is calculated respectively; wherein the gas production of the centrifugal air compressor includes the minimum gas production and the adjusted gas production;

[0055] If the sum of the gas production amounts is greater than or equal to the maximum flow of the gas pipeline network, the corresponding number of starts is determined as the number of starts of the air compressors matched with the maximum flow.

[0056] Specifically, in the embodiments of the present application, the gas production amount of a centrifugal air compressor is 1.2 cubic meters per minute, and the gas production amount of a variable frequency air compressor is 0.5 cubic meters per minute; assuming that the maximum flow (instantaneous flow) of the gas pipeline network is 2.8 cubic meters per minute, different numbers of centrifugal air compressors and variable frequency air compressors are combined according to the gas production amounts of the centrifugal air compressors and the variable frequency air compressors, for example, the combination of starting 2 centrifugal air compressors and 1 variable frequency air compressor at the same time can meet the maximum flow of the gas pipeline network, or starting 3 centrifugal air compressors at the same time can also meet the maximum flow of the gas pipeline network.

[0057] In the embodiments of the present application, the sum of the gas production amounts of the centrifugal air compressors and the variable frequency air compressors combined in different numbers can accurately determine the number of starts of the air compressors matched with the maximum flow of the gas pipeline network, which not only can reduce the frequent start-stop phenomenon of the air compressors in the air compression system, but also can improve the utilization rate of compressed air energy.

[0058] In another embodiment of the present application, as shown in Figure 3 The control method of the compressed air system specifically includes the following steps:

[0059] Step S301: determining the number of starts or the number of stops of the air compressors according to at least one of the first pressure, the flow of the gas pipeline network, and the gas production amount of the currently running air compressors and the intake valve opening degree of each air compressor.

[0060] In the embodiments of the present application, according to at least one of the first pressure, the flow of the gas pipeline network, and the gas production amount of the currently running air compressors and the intake valve opening degree of each air compressor, the number of starts or the number of stops of the air compressors matched with the user end can be accurately determined, so as to determine the number of starts of the air compressors corresponding to the gas consumption of the user end, reduce the frequent start-stop phenomenon of the air compressors, and improve the utilization rate of compressed air energy.

[0061] Step S302: determining the pressure adjustment value of the gas pipeline network according to the first pressure, the second pressure of the gas pipeline network at the user end, and the target pressure.

[0062] The step S302 has been described in the foregoing, and will not be described here.

[0063] In one or more embodiments, the number of starts of the air compressors is determined according to at least one of the first pressure, the flow of the gas pipeline network, and the gas production amount of the currently running air compressors, including:

[0064] In the case that the first pressure is less than the target pressure, the number of centrifugal air compressors to be turned on is determined according to the target pressure.

[0065] Specifically, the target pressure is a pressure set according to the pressure required by the user end pipeline network. When the first pressure at the main pipeline of the gas transmission pipeline network is less than the target pressure, it indicates that the pressure at the main pipeline is insufficient, and the number of air compressors to be turned on needs to be increased. The number of air compressors to be turned on is determined according to the target pressure.

[0066] Alternatively, in the case that the current required flow of the gas transmission pipeline network is greater than the system set flow, the number of air compressors to be turned on is determined according to the current required flow; wherein the system set flow is the maximum gas production of the air compressors currently running.

[0067] Specifically, the current required flow here includes the real-time gas consumption required by the user end. When the system set flow is less than the current flow of the gas transmission pipeline network, it indicates that the gas production of the air compressors currently running is insufficient, and the number of air compressors to be turned on needs to be increased. The number of air compressors to be turned on is determined according to the current required flow.

[0068] In the embodiments of the present application, the number of air compressors to be turned on that matches the maximum flow of the gas transmission pipeline network can be accurately determined by the sum of the gas production of the centrifugal air compressors and the variable frequency air compressors in different number combinations. This not only reduces the frequent start-stop phenomenon of the air compressors in the air compression system, but also improves the utilization rate of compressed air energy.

[0069] In one or more embodiments, the number of air compressors to be turned off is determined according to the first pressure, the flow of the gas transmission pipeline network, and the gas production of the air compressors currently running in the compressed air system and the inlet valve opening degree of each air compressor, comprising:

[0070] In the case that the first pressure is greater than or equal to the target pressure, the current required flow of the gas transmission pipeline network is less than the system set flow, and the inlet valve opening degree of each air compressor is less than the preset threshold, the number of air compressors to be turned off is determined according to the target pressure or the target flow; wherein the system set flow is the maximum gas production of the air compressors currently running.

[0071] Specifically, the current required flow here includes the gas flow required by the user end in real time, when the first pressure at the main pipe of the gas transmission pipeline network is greater than or equal to the target pressure, it indicates that the pressure at the main pipe is too large, and when the set flow of the system is greater than or equal to the current flow of the gas transmission pipeline network, it indicates that the gas production of the air compressor running at this time is too large. The preset threshold of the air compressor inlet valve opening degree here can be set according to the actual production needs, when the air compressor inlet valve opening degree is less than the preset threshold, it indicates that the gas production is too much under the condition of small opening degree of the air compressor inlet valve; At this time, the number of running air compressors needs to be reduced. The total gas production can be adjusted appropriately by adjusting the inlet valve opening degree in the embodiment of the application.

[0072] In another embodiment of the application, as shown in Figure 4 The control method of the compressed air system specifically includes the following steps:

[0073] Step S401: determining the operation parameter of the air compressor according to at least one of the first pressure at the main pipe of the gas transmission pipeline network and the flow of the above gas transmission pipeline network, and the attribute parameter of the air compressor in the compressed air system.

[0074] Step S402: determining the first pressure adjustment value of the gas transmission pipeline network according to the first difference between the first pressure and the target pressure;

[0075] Step S403: determining the first pressure set value as the product of the preset pressure compensation coefficient and the first pressure adjustment value;

[0076] Step S404: determining the second pressure set value of the gas transmission pipeline network according to the second difference between the second pressure and the first pressure set value;

[0077] Step S405: determining the target pressure adjustment value of the gas transmission pipeline network as the sum of the first pressure set value and the second pressure set value.

[0078] Specifically, in the embodiment of the application, as shown in Figure 7 The first pressure adjustment value R(PID1) of the gas transmission pipeline network is determined according to the first difference between the first pressure (f(P2)) of the gas transmission pipeline network at the user end and the target pressure (Set). The product of the preset pressure compensation coefficient x and the first pressure adjustment value PID1 is determined as the first pressure set value, that is, the first pressure set value is Rx. The second pressure set value PID2 of the gas transmission pipeline network is determined according to the second difference between the second pressure (f(P1)) of the gas transmission pipeline network at the main pipe and the first pressure set value Rx, and the sum of the first pressure set value Rx and the second pressure set value PID2 is determined as the target pressure adjustment value of the gas transmission pipeline network, that is, the target pressure adjustment value y=PID1*x+PID2.

[0079] The step S401 has been described above and will not be repeated here.

[0080] The embodiment of the present application can accurately determine the pressure regulating value of the gas transmission pipe network based on the first pressure at the main pipe of the gas transmission pipe network and the second pressure at the user end of the gas transmission pipe network and the pressure compensation coefficient, and can also timely and effectively provide the pressure regulating value of the user end, thereby improving the user experience.

[0081] In another embodiment of the present application, as shown in Figure 5 The control method of the compressed air system specifically includes the following steps:

[0082] Step S501: determining the operating parameter of the air compressor based on at least one of the first pressure at the main pipe of the gas transmission pipe network and the flow of the gas transmission pipe network, and the attribute parameter of the air compressor in the compressed air system.

[0083] Step S502: determining the pressure regulating value of the gas transmission pipe network based on the first pressure, the second pressure at the user end of the gas transmission pipe network, and the target pressure.

[0084] Step S503: determining the regulating parameter of the cooling fan in the cooling tower of the compressed air system based on the operating data of the cooling fan.

[0085] Step S504: determining the regulating parameter of the cooling water pump of the compressed air system based on the operating data of the cooling water pump.

[0086] In the embodiment of the present application, based on the operating data of the cooling fan and the cooling water pump, the regulating parameter of the cooling fan and the cooling water pump can be accurately obtained, and the air compressor of the compressed air system can be accurately and effectively provided with compressed air energy of a corresponding temperature.

[0087] In one or more embodiments, the operating data of the cooling fan includes the cooling water temperature and the operating frequency of the cooling fan, and the regulating parameter of the cooling fan is determined based on the operating data of the cooling fan in the cooling tower, including:

[0088] In the case where the cooling water temperature in the cooling tower is greater than the set interval temperature and the operating frequency of the cooling fan is greater than the set frequency, the number of cooling fans turned on is increased.

[0089] In the case where the cooling water temperature in the cooling tower is less than or equal to the set interval temperature and the operating frequency of the cooling fan is less than or equal to the set frequency, the number of cooling fans turned on is reduced.

[0090] In one or more embodiments, the operation data of the cooling water pump includes a cooling water supply and return pressure difference and an operation frequency of the cooling water pump, and the operation parameter of the cooling water pump is determined according to the operation data of the cooling water pump, including:

[0091] In a case where the cooling water supply and return pressure difference is less than the set supply and return pressure difference and the operation frequency of the cooling water pump is greater than the set frequency, the number of the cooling water pumps in operation is increased.

[0092] In a case where the cooling water supply and return pressure difference is greater than or equal to the set supply and return pressure difference, the operation frequency of the cooling water pump is less than or equal to the set frequency, and the branch flow of the user end is less than the maximum flow of the cooling water pump in operation, the number of the cooling water pumps in operation is reduced.

[0093] Based on the above embodiment, in another embodiment of the present application, the control method of the compressed air system specifically includes the following steps:

[0094] 1. Collecting the pressure data (the pressure of P1 point) and the flow data (the flow of P1 point) of the pipe network end (such as the pressure of P1 point) through the pressure detector and the flow detector installed in the gas transmission pipe network (the main pipe).

[0095] 2. Collecting the pressure data of P2 point pipe network at the most unfavorable point (such as P2 point) of the user end pressure of the gas transmission pipe network.

[0096] 3. The air compression centralized control device obtains various operation parameters of the air compressor (high-pressure centrifugal air compressor and variable frequency air compressor).

[0097] 4. The end flow range is determined through the collected flow data of the user end, and the air compressor cluster in the air compressor cluster is adjusted by the air compression centralized control device through the collected end flow range. The proportion of the air compressor start needs to meet: (the minimum gas production of the centrifugal air compressor + the adjustable air intake production of the centrifugal air compressor + the gas production of the variable frequency air compressor) > the maximum value of the gas flow required by the use end.

[0098] 5. The air compression centralized control device controls the start strategy of the air compressor according to the collected data, including:

[0099] determining to start the air compressor in a case where the first pressure of the gas transmission pipe network at the main pipe is less than the target pressure;

[0100] determining to start the air compressor in a case where the current required flow of the gas transmission pipe network is greater than the system set flow; wherein the system set flow is the maximum gas production of the air compressor in operation.

[0101] 6. The air compression centralized control device controls the shutdown strategy of the air compressor according to the collected data, including:

[0102] In the case that the first pressure is greater than or equal to the target pressure, the current required flow of the gas pipeline network is less than the system set flow, and the opening degree of each air compressor inlet valve is less than a preset threshold (such as 80%), the number of air compressors to be closed that matches the target pressure or the target flow is determined, wherein the system set flow is the maximum gas output of the currently running air compressors.

[0103] 7. By collecting the pressure at the most unfavorable point (P2 point) of the user end and accessing the air compression centralized control device for cascade control, the mother pipe gas supply pressure setting can be accurately and timely corrected. According to the user end gas pressure, on-demand gas supply is realized, and energy is saved.

[0104] 8. The operation number of the cooling tower cooling fan in the compressed air system is collected, and the operation data of the cooling water pump in the compressed air system is collected.

[0105] 9. The temperature and pressure data of the cooling water pipeline network are collected through the pressure detector and temperature detector installed on the cooling water pipeline network.

[0106] 10. The air compression centralized control device controls the increase and decrease strategy of the cooling fan according to the collected water supply temperature, including: in the case that the cooling water temperature in the cooling tower is greater than the set interval temperature, and the operation frequency of the cooling fan is greater than the set frequency, the number of cooling fans to be turned on is increased.

[0107] In the case that the cooling water temperature in the cooling tower is less than or equal to the set interval temperature, and the operation frequency of the cooling fan is less than or equal to the set frequency, the number of cooling fans to be turned on is decreased.

[0108] 11. The air compression centralized control device controls the increase and decrease strategy of the cooling water pump according to the collected water supply temperature, including: in the case that the supply and return water pressure difference of the cooling water is less than the set supply and return water pressure difference, and the operation frequency of the cooling water pump is greater than the set frequency, the number of cooling water pumps to be turned on is increased.

[0109] In the case that the supply and return water pressure difference of the cooling water is greater than or equal to the set supply and return water pressure difference, the operation frequency of the cooling water pump is less than or equal to the set frequency, and the flow of each branch pipe at the user end is less than the maximum flow of the currently running cooling water pump, the number of cooling water pumps to be turned on is decreased.

[0110] By applying the technical solution of the present application, the compressed air system is controlled and regulated, which can effectively reduce the frequent start-stop phenomenon of the air compressor during operation, and can reduce the gas venting phenomenon caused by unstable gas load at the user end. In addition, by controlling the temperature and pressure of the air compression cooling water, the required gas flow and pressure at the user end can be accurately met, and the waste of gas energy is reduced.

[0111] The embodiment of the present application further provides a control device of a compressed air system, which is used for executing the control method of the compressed air system provided by the above-mentioned embodiments. Figure 8 As shown in the figure, the device comprises:

[0112] A first determining unit 801 is configured to determine an operation parameter of an air compressor in the compressed air system according to at least one of a first pressure at a main pipe of a gas transmission pipe network and a flow of the gas transmission pipe network, and an attribute parameter of the air compressor.

[0113] A second determining unit 802 is configured to determine a pressure adjustment value of the gas transmission pipe network according to the first pressure, a second pressure at a user terminal of the gas transmission pipe network and a target pressure.

[0114] In the technical scheme of the embodiment of the present application, the number of the air compressors to be started can be accurately determined according to the maximum flow of the gas transmission pipe network and the gas production of each air compressor, so that the compressed air matching the gas demand of the user terminal can be provided, the additional consumption of energy can be reduced, and the utilization rate of energy can be improved.

[0115] In one or more embodiments, the attribute parameter comprises the gas production of the air compressor, and the operation parameter comprises the number of the air compressors to be started.

[0116] The first determining unit 801 comprises a first determining module configured to determine the number of the air compressors to be started matching the maximum flow according to the maximum flow of the gas transmission pipe network and the gas production of each air compressor.

[0117] In one or more embodiments, the air compressor comprises a centrifugal air compressor and a variable frequency air compressor, and the first determining module comprises:

[0118] A calculating sub-unit is configured to calculate the sum of the gas production of the centrifugal air compressor and the variable frequency air compressor in different number combinations respectively; wherein the gas production of the centrifugal air compressor comprises a minimum gas production and an adjusted intake amount.

[0119] A first determining sub-unit is configured to determine the number of the air compressors to be started corresponding to the case that the sum of the gas production is greater than or equal to the maximum flow of the gas transmission pipe network as the number of the air compressors to be started matching the maximum flow.

[0120] In one or more embodiments, the first determining unit 801 further comprises:

[0121] A second determining module is configured to determine the number of the air compressors to be started or the number of the air compressors to be stopped according to at least one of the first pressure, the flow of the gas transmission pipe network, the gas production of the air compressor currently running and the intake valve opening degree of each air compressor.

[0122] In one or more embodiments, the second determining module comprises:

[0123] The second determining sub-unit is configured to determine the number of air compressors to be started up to match the target pressure when the first pressure is less than the target pressure.

[0124] The third determining sub-unit is configured to determine the number of air compressors to be started up to match the current required flow rate of the gas pipeline network when the current required flow rate of the gas pipeline network is greater than the system set flow rate.

[0125] In one or more embodiments, the second determining module comprises:

[0126] The fourth determining sub-unit is configured to determine the number of air compressors to be shut down to match the target pressure or target flow rate when the first pressure is greater than or equal to the target pressure, the current required flow rate of the gas pipeline network is less than the system set flow rate, and the intake valve opening degree of each air compressor is less than the preset threshold.

[0127] The system set flow rate is the maximum gas output of the currently running air compressors.

[0128] In one or more embodiments, the second determining unit 802 comprises:

[0129] The third determining module is configured to determine a first pressure adjustment value of the gas pipeline network according to a first difference between the first pressure and the target pressure.

[0130] The fourth determining module is configured to determine a product of a preset pressure compensation coefficient and the first pressure adjustment value as a first pressure set value.

[0131] The fifth determining module is configured to determine a second pressure set value of the gas pipeline network according to a second difference between the second pressure and the first pressure set value.

[0132] The sixth determining module is configured to determine a sum of the first pressure set value and the second pressure set value as a target pressure adjustment value of the gas pipeline network.

[0133] In one or more embodiments, the control device of the compressed air system further comprises:

[0134] The third determining unit is configured to determine an adjustment parameter of a heat dissipation fan in the cooling tower of the compressed air system according to operation data of the heat dissipation fan.

[0135] The fourth determining unit is configured to determine an adjustment parameter of a cooling water pump of the compressed air system according to operation data of the cooling water pump.

[0136] In one or more embodiments, the third determination unit comprises:

[0137] The first adjustment module is configured to increase the number of the cooling tower fans in operation when the temperature of the cooling water in the cooling tower is greater than the set temperature range and the operation frequency of the cooling tower fan is greater than the set frequency.

[0138] The second adjustment module is configured to decrease the number of the cooling tower fans in operation when the temperature of the cooling water in the cooling tower is less than or equal to the set temperature range and the operation frequency of the cooling tower fan is less than or equal to the set frequency.

[0139] In one or more embodiments, the fourth determination unit comprises:

[0140] The third adjustment module is configured to increase the number of the cooling water pumps in operation when the pressure difference between the supply and return of the cooling water is less than the set pressure difference and the operation frequency of the cooling water pump is greater than the set frequency.

[0141] The fourth adjustment module is configured to decrease the number of the cooling water pumps in operation when the pressure difference between the supply and return of the cooling water is greater than or equal to the set pressure difference, the operation frequency of the cooling water pump is less than or equal to the set frequency, and the flow rate of each branch pipe of the user end is less than the maximum flow rate of the currently operating cooling water pump.

[0142] The control device of the compressed air system provided by the above embodiments of the present application has the same beneficial effects as the method adopted, run or implemented by the stored application program.

[0143] Figure 9 is a logical structure block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 900 can be a programmable logic controller, a motor controller, a vehicle-mounted controller, a domain controller, or other industrial production equipment, etc. set inside an electrical device.

[0144] In an example embodiment, a non-transitory computer-readable storage medium, such as a memory including instructions, is also provided. The instructions can be executed by a processor of a battery to perform the method of controlling the compressed air system, which includes determining an operating parameter of an air compressor in the compressed air system based on at least one of a first pressure at a main pipe of a gas distribution network and a flow rate of the gas distribution network, and an attribute parameter of the air compressor. The instructions can also be executed by the processor of the battery to perform other steps involved in the example embodiments. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0145] In an example embodiment, an application program / computer program product is also provided, which includes one or more instructions executable by a processor of a battery to perform the method of controlling the compressed air system, which includes determining an operating parameter of an air compressor in the compressed air system based on at least one of a first pressure at a main pipe of a gas distribution network and a flow rate of the gas distribution network, and an attribute parameter of the air compressor. The instructions can also be executed by the processor of the battery to perform other steps involved in the example embodiments.

[0146] Figure 9 An example diagram of an electronic device 900 is shown. Those skilled in the art will understand that the diagram is merely an example of an electronic device 900 and does not limit the electronic device 900. The electronic device 900 can include more or fewer components, different components, or differently arranged components than those shown in the figure. For example, the electronic device 900 can also include an input / output device, a network access device, a bus, etc. Figure 9 The diagram of the electronic device 900 is merely an example and does not limit the electronic device 900. The electronic device 900 can include more or fewer components than those shown in the diagram, or can have components arranged differently than those shown in the diagram. For example, the electronic device 900 can also include an input / output device, a network access device, a bus, etc.

[0147] The processor 902 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor or the processor 902 can also be any conventional processor. The processor 902 is a control center of the electronic device 900, and connects all parts of the electronic device 900 through various interfaces and lines.

[0148] The memory 901 can be used to store computer-readable instructions, and the processor 902 can realize various functions of the electronic device 900 by running or executing the computer-readable instructions or modules stored in the memory 901, and calling data stored in the memory 901. The memory 901 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), and the like; and the data storage area can store data created according to the use of the electronic device 900, etc. In addition, the memory 901 can include a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one magnetic disk storage device, a flash memory device, a read-only memory (ROM), a random access memory (RAM) or other non-volatile / volatile storage devices.

[0149] The modules integrated in the electronic device 900, if implemented in the form of software function modules and sold or used as independent products, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the flow of the above-mentioned embodiment methods can also be implemented through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium, and when executed by a processor, can realize the steps of the above-mentioned various method embodiments.

[0150] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0151] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various changes in shape, size and arrangements of parts can be made without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A control method for a compressed air system, characterized in that, include: The operating parameters of the air compressor are determined based on at least one of the first pressure at the main pipe of the gas transmission pipeline and the flow rate of the gas transmission pipeline, as well as the attribute parameters of the air compressor in the compressed air system. Determining the pressure adjustment value of the gas transmission pipeline network based on the first pressure, the second pressure of the gas transmission pipeline network at the user end, and the target pressure includes: determining the first pressure adjustment value of the gas transmission pipeline network based on the first difference between the first pressure and the target pressure; The product of the preset pressure compensation coefficient and the first pressure adjustment value is determined as the first pressure setting value; the second pressure setting value of the gas transmission pipeline is determined according to the second difference between the second pressure and the first pressure setting value; the sum of the first pressure setting value and the second pressure setting value is determined as the target pressure adjustment value of the gas transmission pipeline.

2. The method according to claim 1, characterized in that, The attribute parameters include the air output of the air compressor, and the operating parameters include the number of times the air compressor is turned on. The step of determining the operating parameters of the air compressor based on at least one of the first pressure at the main pipe of the gas transmission pipeline and the flow rate of the gas transmission pipeline, as well as the attribute parameters of the air compressor in the compressed air system, includes: Based on the maximum flow rate of the gas transmission pipeline network and the gas production capacity of each air compressor, determine the number of air compressors to be turned on that match the maximum flow rate.

3. The method according to claim 2, characterized in that, The air compressors include centrifugal air compressors and variable frequency air compressors. Determining the number of air compressors to be activated, matching the maximum flow rate of the gas transmission network and the air output of each air compressor, includes: Calculate the sum of the air production of centrifugal air compressors and variable frequency air compressors with different combinations of quantities; wherein, the air production of the centrifugal air compressor includes the minimum air production and the adjustable air intake. The number of air compressors to be turned on when the sum of the gas production is greater than or equal to the maximum flow rate of the gas transmission pipeline is determined as the number of air compressors to be turned on that matches the maximum flow rate.

4. The method according to any one of claims 1 to 3, characterized in that, The step of determining the operating parameters of the air compressor based on at least one of the first pressure at the main pipe of the gas transmission pipeline network and the flow rate of the gas transmission pipeline network, as well as the attribute parameters of the air compressor of the compressed air system, further includes: The number of air compressors to be opened or closed is determined based on the first pressure, the flow rate of the gas transmission network, the gas production of the currently operating air compressor, and at least one of the air intake valve opening degree of each air compressor.

5. The method according to claim 4, characterized in that, Based on the first pressure, the flow rate of the gas transmission pipeline, and the gas production of the currently operating air compressor, the number of additional air compressors to be activated is determined, including: If the first pressure is less than the target pressure, determine the number of additional air compressors that match the target pressure; or If the current required flow rate of the gas transmission pipeline is greater than the system set flow rate, determine the number of additional air compressors to be started that match the current required flow rate; wherein, the system set flow rate is the maximum gas output of the currently running air compressor.

6. The method according to claim 4, characterized in that, The step of determining the number of air compressors to be shut down based on the first pressure, the flow rate of the gas transmission pipeline, the air output of the currently operating air compressors in the compressed air system, and the opening degree of the intake valves of each air compressor includes: When the first pressure is greater than or equal to the target pressure, the current required flow rate of the gas pipeline is less than the system set flow rate, and the opening degree of the air compressor intake valve is less than the preset threshold, determine the number of air compressors to be shut down that match the target pressure or target flow rate. The system is set to the maximum air output of the currently running air compressor.

7. The method according to claim 1, characterized in that, The method further includes: Based on the operating data of the cooling fan in the cooling tower of the compressed air system, determine the adjustment parameters of the cooling fan; Based on the operating data of the cooling water pump of the compressed air system, the adjustment parameters of the cooling water pump are determined.

8. The method according to claim 7, characterized in that, The operating data of the cooling fan includes the cooling water temperature and the operating frequency of the cooling fan. Based on the operating data of the cooling fan in the cooling tower, the adjustment parameters of the cooling fan are determined, including: If the cooling water temperature in the cooling tower is greater than the set temperature range and the operating frequency of the cooling fan is greater than the set frequency, the number of cooling fans turned on shall be increased. When the cooling water temperature in the cooling tower is less than or equal to the set temperature range and the operating frequency of the cooling fan is less than or equal to the set frequency, the number of cooling fans turned on shall be reduced.

9. The method according to claim 7 or 8, characterized in that, The operating data of the cooling water pump includes the supply and return water pressure difference and the operating frequency of the cooling water pump. Based on the operating data of the cooling water pump, the operating parameters of the cooling water pump are determined, including: If the supply and return pressure difference of the cooling water is less than the set supply and return pressure difference, and the operating frequency of the cooling water pump is greater than the set frequency, increase the number of cooling water pumps that are turned on. If the supply and return water pressure difference of the cooling water is greater than or equal to the set supply and return water pressure difference, the operating frequency of the cooling water pump is less than or equal to the set frequency, and the flow rate of each branch pipe at the user terminal is less than the maximum flow rate of the currently operating cooling water pump, the number of cooling water pumps turned on shall be reduced.

10. A control device for a compressed air system, characterized in that, include: The first determining unit is used to determine the operating parameters of the air compressor based on at least one of the first pressure at the main pipe of the gas transmission pipeline and the flow rate of the gas transmission pipeline, as well as the attribute parameters of the air compressor in the compressed air system. The second determining unit is used to determine the pressure adjustment value of the gas transmission pipeline network based on the first pressure, the second pressure of the gas transmission pipeline network at the user terminal, and the target pressure, including: determining the first pressure adjustment value of the gas transmission pipeline network based on the first difference between the first pressure and the target pressure; The product of the preset pressure compensation coefficient and the first pressure adjustment value is determined as the first pressure setting value; the second pressure setting value of the gas transmission pipeline is determined according to the second difference between the second pressure and the first pressure setting value; the sum of the first pressure setting value and the second pressure setting value is determined as the target pressure adjustment value of the gas transmission pipeline.

11. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the method described in any one of claims 1 to 9 through the computer program.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when executed, performs the method according to any one of claims 1 to 9.

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