Field end nitrogen-compressed air switching device, intelligent switching method, medium and equipment

Abstract

The invention relates to a field end nitrogen-compressed air switching device, an intelligent switching method, a medium and equipment. The intelligent switching method comprises the following steps that the running state of an air compressor of a compressed air subsystem is judged; the operation state of a nitrogen compressor of the nitrogen subsystem is judged; judging the nitrogen pressure and the air pressure of the user side; and the switching mode of the nitrogen subsystem and the compressed air subsystem is determined according to the judgment result. According to the method, nitrogen or compressed air can be automatically switched to be used according to the compressor load conditions of the compressed air subsystem and the nitrogen subsystem of the nitrogen-compressed air integrated system and the use amount requirement of the user side, so that the load rate of a compressor group in the system is balanced, and the defect that one subsystem is not enough is overcome; and the other subsystem has abundant problems.

Description

Technical Field

[0001] The present invention belongs to the field of energy technology, and specifically relates to an on-site nitrogen-compressed air switching device, an intelligent switching method, a medium and equipment. Background Art

[0002] The switching and adjustment of nitrogen and compressed air is one of the more frequent operations of industrial and trade enterprises, and according to the actual process requirements, the supply of energy media must reach users quickly, stably and safely. In the prior art, the switching device for nitrogen and compressed air often requires the use of nitrogen or compressed air alone in a certain period of time according to the process conditions, and the operator needs to go to the site to manually operate the valves controlling nitrogen or compressed air in the switching device; or the operator first performs remote operation in the central control room, and then goes to the site to confirm whether the corresponding valve status of the control nitrogen and compressed air in the switching device is correct. Therefore, the above adjustment and confirmation process of the prior art has hysteresis and low efficiency, which is not conducive to the continuous production and stable operation of the process. Summary of the invention

[0003] In order to overcome the problems existing in the prior art, the present invention provides an on-site nitrogen-compressed air switching device, an intelligent switching method, a medium and equipment to solve the current problems.

[0004] A method for intelligent switching of a field-end nitrogen-compressed air switching device, wherein the field-end nitrogen-compressed air switching device is arranged in a nitrogen-compressed air integrated system, wherein the system comprises a field end and a user end, wherein the field end comprises a nitrogen subsystem, a compressed air subsystem and a field-end nitrogen-compressed air switching device, wherein the nitrogen subsystem and the compressed air subsystem are connected in parallel and are both connected to the user end and the field-end nitrogen-compressed air switching device through pipelines, wherein the nitrogen subsystem and the compressed air subsystem both comprise pipelines, valves and compressors, wherein the valves are arranged on the pipelines, and the compressors provide nitrogen or compressed air to each user at the user end through the pipelines, wherein the field-end nitrogen-compressed air switching device intelligently switches nitrogen and air from the nitrogen subsystem and the compressed air subsystem, and the process comprises the following steps:

[0005] S1. Determine the operating status of the air compressor of the compressed air subsystem;

[0006] S2. Determine the operating status of the nitrogen compressor of the nitrogen subsystem;

[0007] S3. Determine the nitrogen pressure and air pressure at the user end;

[0008] S4. Determine the switching mode between the nitrogen subsystem and the compressed air subsystem according to the judgment results of S1-S3.

[0009] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the operating state of the air compressor includes a release state and a compression state, and the operating state of the nitrogen compressor includes a compression state.

[0010] According to the above aspects and any possible implementation, an implementation is further provided, wherein the valve of the compressed air subsystem includes a relief valve, and S1 specifically includes: S11. Determine the compression state of the air compressor, and set the compression state of the air compressor to a state where the opening of the relief valve of the compressed air subsystem is less than a preset relief valve opening;

[0011] S12. Determine the release state of the air compressor, and set the release state of the air compressor to a release valve opening of the compressed air subsystem that is greater than or equal to a preset release valve opening.

[0012] According to the above aspects and any possible implementation, an implementation is further provided, wherein the valve of the nitrogen subsystem includes a relief valve, and the compression state of the nitrogen compressor is set so that the opening of the relief valve of the nitrogen subsystem is less than a preset relief valve opening.

[0013] According to the above aspects and any possible implementation, an implementation is further provided, wherein S3 specifically includes: S31. measuring the relationship between the nitrogen pressure value of the user end and the set minimum threshold value, and determining whether the nitrogen provided by the nitrogen subsystem meets the needs of the user end;

[0014] S32. Measure the relationship between the air compression pressure value at the user end and the set minimum threshold value to determine whether the air provided by the compressed air subsystem meets the needs of the user end. The sequence of S31 and S32 is adjustable.

[0015] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the switching includes: if the current user terminal is using a nitrogen subsystem, switching the user terminal to a compressed air subsystem; or, if the current user terminal is using a compressed air subsystem, switching the user terminal to a nitrogen subsystem.

[0016] According to the aspects described above and any possible implementation method, an implementation method is further provided, S4 specifically includes: when it is determined that the air compressor is vented, that is, the relief valve opening of the air compressor is outside the energy-saving approval set; or when it is determined that the air compressor is not vented, that is, the relief valve opening of the air compressor is within the energy-saving approval set, and it is determined that the relief valve opening of the nitrogen compressor is also within the energy-saving approval set, and it is determined that the measured nitrogen pressure value is lower than its absolute threshold value, the user end switches from using the nitrogen subsystem to using the compressed air subsystem.

[0017] According to the aspects described above and any possible implementation method, an implementation method is further provided, S4 specifically includes: when it is determined that the air compressor is vented, that is, the relief valve opening of the air compressor is outside the energy-saving approval set; or when it is determined that the air compressor is not vented, that is, the relief valve opening μ of the air compressor is within the energy-saving approval set, and it is determined that the relief valve opening of the nitrogen compressor is also within the energy-saving approval set, and it is determined that the measured nitrogen pressure value is lower than its absolute threshold value, the user end switches from using the nitrogen subsystem to using the compressed air subsystem.

[0018] The present invention also provides an on-site nitrogen-compressed air switching device, which is used to implement the method described, and comprises:

[0019] A first judgment module is used to judge the operating state of the air compressor of the compressed air subsystem;

[0020] The second judgment module is used to judge the operating state of the nitrogen compressor of the nitrogen subsystem;

[0021] The third judgment module is used to judge the nitrogen pressure and air pressure of the user end;

[0022] The switching module is used to determine the switching mode of the nitrogen subsystem and the compressed air subsystem according to the judgment results of the first judgment module, the second judgment module and the third judgment module.

[0023] The present invention also provides a computer storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the method described.

[0024] The present invention further provides an electronic device, comprising:

[0025] A memory storing executable instructions;

[0026] A processor is used to execute the executable instructions in the memory to implement the method.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides an intelligent switching method for a field-end nitrogen-compressed air switching device, the method comprising the following steps: judging the operating state of the air compressor of the compressed air subsystem; judging the operating state of the nitrogen compressor of the nitrogen subsystem; judging the nitrogen pressure and air pressure at the user end; and determining the switching mode of the nitrogen subsystem and the compressed air subsystem according to the judgment result. The method of the present invention can automatically switch to use nitrogen or compressed air according to the compressor load conditions of the compressed air subsystem and the nitrogen subsystem of the nitrogen-compressed air integrated system and the user end usage requirements, thereby balancing the load rate of the compressor group in the system and overcoming the problem that one subsystem is insufficient and the other subsystem is abundant. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a switching system of the present invention;

[0030] Figure 2 is a schematic diagram of a switching method of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the electronic device of the present invention. DETAILED DESCRIPTION

[0032] In order to better understand the technical solution of the present invention, the content of the present invention includes but is not limited to the specific implementation methods described below, and similar technologies and methods should be considered to be within the scope of protection of the present invention. In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] It should be clear that the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] like Figure 1As shown, the nitrogen-compressed air integrated system of the present invention includes a field end and a user end, the field end includes a nitrogen subsystem, an air compressor subsystem and a nitrogen-compressed air switching device, the user end includes various users at the user end and peak-shaving users, wherein each user at the user end is a fixed user, the nitrogen subsystem provides nitrogen to some of the fixed users through pipelines and valves, and the compressed air subsystem provides nitrogen to other fixed users through pipelines and valves, at the same time, the nitrogen subsystem and the compressed air subsystem are connected in parallel, and are connected to the nitrogen-compressed air switching device through pipelines and valves, and the nitrogen-compressed air switching device is used to provide nitrogen or compressed air to the peak-shaving users. Wherein the valve is arranged on the pipeline, the nitrogen compressor or nitrogen compressor of the nitrogen subsystem provides nitrogen to various users at the user end through the pipeline, and the air compressor or air compressor of the compressed air subsystem provides compressed air to various users at the user end through the pipeline, and the number of nitrogen compressors or air compressors in each nitrogen subsystem or compressed air subsystem includes at least one. The valves in the nitrogen subsystem include a relief valve. The state of the nitrogen compressor can be obtained by measuring the opening of the relief valve. The state of the air compressor includes a relief state or a venting state, an intake state, a compression state, and an exhaust state. The present invention only describes the air compressor in the relief state and the compression state, and does not describe the intake state and the exhaust state, because the intake state refers to the process of opening the air inlet of the compressor and inhaling external air or other gases, which is the beginning stage of the compression cycle. The exhaust state refers to the compressed high-pressure gas being discharged from the compressor through the exhaust valve, entering the gas storage tank or directly transported to the point of use. The exhaust stage is the end of the compression cycle.

[0036] The switching method of the present invention not only takes into account the working status of the nitrogen compressor or air compressor of the nitrogen subsystem and the compressed air subsystem, but also takes into account the real-time pressure at the user end, that is, the compressed nitrogen pressure collected in real time at the user end and provided to the user by the nitrogen subsystem through a pipeline; the compressed air pressure collected in real time at the user end and provided to the user by the compressed air subsystem through a pipeline.

[0037] The method of the present invention is as follows: 1) setting the compression state of the air compressor;

[0038] This compression state uses the air compressor energy saving approval set I μTo express, its expression is shown in formula (1), where μ0 is the predefined relief valve opening, expressed as a percentage, where μ0 is 3%, removing the zero drift interference of the compressor relief valve. μ0 should actually be a mechanical absolute 0. When the relief opening is less than or equal to 0, it is not vented, and when it is greater than 0, it is vented. The present invention replaces this mechanical absolute 0 with 3% as the defined "zero", which means that when the relief opening is less than or equal to 3%, it is not vented, and when it is greater than 3%, it is vented. The purpose is to prevent the occurrence of relief valve zero drift interference, resulting in inaccurate identification; μ is the real-time operating air compressor relief valve opening, which reflects the real-time state of the air compressor and is used to determine whether the air compressor is in energy-saving operation. This formula (1) is used to represent a set of air compressors that are not in a relief state, indicating that the air compressor is operating in a high-efficiency range, that is, in a compression state, in a startup state and an external air delivery state, which is a normal startup air delivery state, and the relief valve opening is less than μ0.

[0039] I μ ={μ<μ0} (1)

[0040] 2). Set the release state of the air compressor. To express, its expression is shown in formula (2); at this time, the opening degree of the relief valve of the real-time running air compressor is greater than or equal to μ0, indicating that the air compressor is in a relief state. At this time, although the compressor is delivering air normally, a relief state has occurred. The user needs to increase the amount of air delivered by the air compressor and close the relief valve to avoid waste. Discharge is the biggest waste. The air compressor supply is greater than the user's needs. At this time, the air compressor exceeds its own adjustment capacity. In order to avoid surge, the relief valve must be opened to discharge part of the compressed gas through the relief valve, which is equivalent to doing this part of work in vain, so there is waste.

[0041] This means that the air compressor has been discharged, and its efficiency has decreased. The discharged gas also consumes electrical energy, but it is not supplied to users, causing the power consumption per unit volume of compressed gas to increase and the efficiency to decrease.

[0042] 3) Set the compression state of the nitrogen compressor, which is based on the nitrogen compressor energy saving approval set I αTo express it, its expression is shown in formula (3), where α0 is the predefined relief valve opening "zero". The present invention takes α0 = 3% to remove the interference of equipment zero drift. α0 should actually be the absolute mechanical 0. When the relief opening is less than or equal to 0, it is not relieving, and when it is greater than 0, it is relieving. The present invention replaces this mechanical absolute 0 with 3% as the defined "zero", which means that when the relief opening is less than or equal to 3%, it is not relieving, and when it is greater than 3%, it is relieving. The purpose is to prevent the occurrence of relief valve zero drift interference, which makes it impossible to accurately identify. α is the relief valve opening of the nitrogen compressor in real time operation. The opening reflects the real-time state of the nitrogen compressor. This formula is used to represent a set of nitrogen compressors that are not in a relief state, indicating that the nitrogen compressor is operating in a high-efficiency range.

[0043] I α ={α<α0} (3)

[0044] In addition, formula (4) is used to represent a set of nitrogen compressor pressure in the release state. This formula shows that the release valve opening of the nitrogen compressor is outside the energy saving approval set. α C ={α≥α0}(4), which indicates that the efficiency of the nitrogen compressor decreases.

[0045] 4). Measure the nitrogen pressure value β at the user end. This is the value obtained by real-time collection or measurement of the user end. It is used to determine whether the nitrogen pressure at the user end is too low, indicating whether the nitrogen provided by the nitrogen subsystem meets the user's needs. Set β0 as the absolute threshold of the user's demand for nitrogen. This threshold is the minimum value. In the present invention, β0=1.4Mpa, or other values, which are related to the specific needs of the user end. Formula (5) shows that if the nitrogen pressure value measured at the user end is less than the set absolute threshold, the nitrogen provided by the nitrogen subsystem does not meet the needs of the user end. At this time, the nitrogen subsystem is in an underpressure state and needs to be adjusted. The amount of nitrogen used needs to be reduced.

[0046] I β ={β<β0} (5).

[0047] If the nitrogen pressure value measured by the user end is greater than or equal to the set absolute threshold, it can be expressed by formula (6): β C ={β≥β0}(6), then the nitrogen provided by the nitrogen subsystem meets the needs of the user end, and the gas produced by the nitrogen compressor is greater than or equal to the user demand. At this time, the nitrogen subsystem is in a surplus state.

[0048] 5) Measure the air pressure value γ at the user end. This is the value collected or measured in real time at the user end. It is used to determine whether the air pressure at the user end is too low, indicating whether the air provided by the compressed air subsystem meets the user's needs. Set γ0 as the absolute threshold of the user's demand for air. This threshold is the minimum value. The present invention takes γ0 = 0.62Mpa, or other values, which are related to the specific needs of the user end. Formula (7) shows that if the air pressure value measured at the user end is less than the set absolute threshold, the air provided by the compressed air subsystem does not meet the needs of the user end. At this time, the compressed air subsystem is in an underpressure state and needs to be adjusted. The use of compressed air needs to be reduced. I γ ={γ<γ0}(7).

[0049] If the air pressure measured by the user is greater than or equal to the set absolute threshold, expressed by formula (8), I γ C ={γ≥γ0}(8), the air provided by the compressed air subsystem can meet the needs of the user end. At this time, the compressed air subsystem is in a surplus state.

[0050] 6) Determine the intelligent switching method

[0051] There are two intelligent switching modes for the nitrogen-compressed air switching device: if the current peak-shaving user is using the nitrogen subsystem, the peak-shaving user is switched to the compressed air subsystem; or, if the current peak-shaving user is using the compressed air subsystem, the peak-shaving user is switched to the nitrogen subsystem. The specific switching conditions are as follows:

[0052] The condition for switching from the nitrogen subsystem to the compressed air subsystem is as shown in formula (9): There are two situations:

[0053] The first one is to judge that the air compressor is vented, that is, the opening of the vent valve of the air compressor is outside the energy saving approval set;

[0054] The second is to determine that the air compressor is not vented, that is, the relief valve opening μ of the air compressor is within the energy-saving approval set, the relief valve opening α of the nitrogen compressor is also within the energy-saving approval set, and the measured nitrogen pressure value is lower than its absolute threshold, that is, the gas produced by the nitrogen compressor is less than the user demand, and the compressed air pressure at the user end is not low, that is, the gas produced by the air compressor is greater than or equal to the user demand. At this time, the peak-shaving user switches to using the compressed air subsystem.

[0055] The condition for switching the compressed air subsystem to the nitrogen subsystem is as shown in formula (10): It is also divided into two situations. The first one: the air compressor is not vented, that is, the air compressor's relief valve opening μ is within the energy-saving approval set, and the nitrogen compressor is vented, that is, the nitrogen compressor's relief valve opening is outside the energy-saving approval set. At this time, the user switches to using the nitrogen subsystem.

[0056] The second type: the air compressor is not vented, that is, the vent valve opening μ of the air compressor is within the energy-saving approval set. At the same time, the nitrogen compressor is not vented, that is, the vent valve opening α of the nitrogen compressor is also within the energy-saving approval set. However, the nitrogen pressure at the user end is not low, that is, the gas produced by the nitrogen compressor is greater than or equal to the user demand. At this time, the peak-shaving user switches to using the nitrogen subsystem.

[0057] like Figure 3 As shown, an embodiment of the present invention further provides an electronic device 60, the electronic device comprising:

[0058] at least one processor, and;

[0059] a memory communicatively coupled to the at least one processor, wherein;

[0060] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the aforementioned method.

[0061] An embodiment of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the aforementioned method.

[0062] Reference below Figure 3 , which shows a schematic structural diagram of an electronic device 60 suitable for implementing an embodiment of the present invention.

[0063] The electronic devices in the embodiments of the present invention may include, but are not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The electronic devices shown in the figures are only examples and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0064] like Figure 3 As shown, the electronic device 60 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the electronic device 60 are also stored. The processing device 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0065] Typically, the following devices may be connected to the I / O interface 605: input devices 606 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 608 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 609. The communication device 609 may allow the electronic device 60 to communicate with other devices wirelessly or by wire to exchange data. Although the electronic device 60 with various devices is shown in the figure, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have alternatively.

[0066] In particular, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 609, or installed from the storage device 608, or installed from the ROM 602. When the computer program is executed by the processing device 601, the above-mentioned functions defined in the method of the embodiment of the present invention are executed.

[0067] It should be noted that the computer-readable medium of the present invention can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present invention, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0068] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0069] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains at least two Internet Protocol addresses; sends a node evaluation request including the at least two Internet Protocol addresses to a node evaluation device, wherein the node evaluation device selects an Internet Protocol address from the at least two Internet Protocol addresses and returns it; receives the Internet Protocol address returned by the node evaluation device; wherein the obtained Internet Protocol address indicates an edge node in a content distribution network.

[0070] Alternatively, the computer-readable medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device: receives a node evaluation request including at least two Internet Protocol addresses; selects an Internet Protocol address from the at least two Internet Protocol addresses; and returns the selected Internet Protocol address; wherein the received Internet Protocol address indicates an edge node in a content distribution network.

[0071] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or combinations thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0072] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. An intelligent switching method for a field nitrogen-compressed air switching device, characterized in that: The field-end nitrogen-compressed air switching device is arranged in a nitrogen-compressed air integrated system, the system includes a field end and a user end, the field end includes a nitrogen subsystem, a compressed air subsystem and a field-end nitrogen-compressed air switching device, the nitrogen subsystem and the compressed air subsystem are connected in parallel, and are both connected to the user end and the field-end nitrogen-compressed air switching device through pipelines, the nitrogen subsystem and the compressed air subsystem both include pipelines, valves and compressors, wherein the valves are arranged on the pipelines, and the compressors provide nitrogen or compressed air to each user at the user end through the pipelines, and the intelligent switching process of the field-end nitrogen-compressed air switching device for nitrogen and air from the nitrogen subsystem and the compressed air subsystem includes the following steps: S1. Determine the operating status of the air compressor of the compressed air subsystem; S2. Determine the operating status of the nitrogen compressor of the nitrogen subsystem; S3. Determine the nitrogen pressure and air pressure at the user end; S4. Determine the switching mode between the nitrogen subsystem and the compressed air subsystem according to the judgment results of S1-S3.

2. The method according to claim 1, characterized in that The operating state of the air compressor includes a release state and a compression state, and the operating state of the nitrogen compressor includes a compression state.

3. The method according to claim 2, characterized in that The valve of the compressed air subsystem includes a relief valve, and S1 specifically includes: S11. Determine the compression state of the air compressor, and set the compression state of the air compressor to a state where the opening of the relief valve of the compressed air subsystem is less than a preset relief valve opening; S12. Determine the release state of the air compressor, and set the release state of the air compressor to a release valve opening of the compressed air subsystem that is greater than or equal to a preset release valve opening.

4. The method according to claim 3, characterized in that The valve of the nitrogen subsystem includes a relief valve, and the compression state of the nitrogen compressor is set so that the opening of the relief valve of the nitrogen subsystem is less than a preset relief valve opening.

5. The method according to claim 1 or 4, characterized in that: The S3 specifically includes: S31. measuring the relationship between the nitrogen pressure value of the user end and the set minimum threshold value, and determining whether the nitrogen provided by the nitrogen subsystem meets the needs of the user end; S32. Measure the relationship between the air compression pressure value at the user end and the set minimum threshold value to determine whether the air provided by the compressed air subsystem meets the needs of the user end. The sequence of S31 and S32 is adjustable.

6. The method according to claim 1, characterized in that The switching includes: if the current user terminal is using the nitrogen subsystem, switching the user terminal to the compressed air subsystem; or if the current user terminal is using the compressed air subsystem, switching the user terminal to the nitrogen subsystem.

7. The method according to claim 5, characterized in that S4 specifically includes: when it is determined that the air compressor is vented, that is, the relief valve opening of the air compressor is outside the energy-saving approval set; or when it is determined that the air compressor is not vented, that is, the relief valve opening of the air compressor is within the energy-saving approval set, and it is determined that the relief valve opening of the nitrogen compressor is also within the energy-saving approval set, and it is determined that the measured nitrogen pressure value is lower than its absolute threshold value, the user end switches from using the nitrogen subsystem to using the compressed air subsystem.

8. A field-side nitrogen-compressed air switching device, characterized in that: The device is used to implement the method described in any one of claims 1 to 7, and the device comprises: A first judgment module is used to judge the operating state of the air compressor of the compressed air subsystem; The second judgment module is used to judge the operating state of the nitrogen compressor of the nitrogen subsystem; The third judgment module is used to judge the nitrogen pressure and air pressure of the user end; The switching module is used to determine the switching mode of the nitrogen subsystem and the compressed air subsystem according to the judgment results of the first judgment module, the second judgment module and the third judgment module.

9. A computer storage medium, characterized in that: The medium stores a computer program, and the computer program is executed by a processor to implement the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device comprises: A memory storing executable instructions; A processor, wherein the processor runs the executable instructions in the memory to implement the method according to any one of claims 1 to 7.

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