Vortex compressor-oxygen generator air volume combined self-adaptive adjustment control device and method

Abstract

The invention belongs to the technical field of oxygenerators, discloses a scroll compressor-oxygenerator air volume combined self-adaptive regulation control device and method, and aims to solve the problem that unused oxygen can be throttled and can also directly flow back through an air inlet of a scroll compressor to be recycled in the next step when the oxygen generation amount of an oxygenerator is greater than the oxygen uptake amount. The mode can effectively utilize the surplus gas amount, reduce the energy consumption and improve the gas utilization rate in the oxygen generation system. Due to the fact that the indicated power consumption of the compressor is in direct proportion to the actual oxygen production flow, the scroll compressor-oxygen generator air volume combined adjusting system can save energy consumption to the maximum extent. The scroll compressor is different from a conventional piston type compressor, the compression process is continuously carried out, the gas transmission amount of the scroll compressor can be changed by adopting a variable rotating speed adjusting method, and the scroll compressor is suitable for occasions where the rotating speed changes in a wide range and is low in maintenance cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen concentrators, and in particular relates to a scroll compressor-oxygen concentrator gas volume combined adaptive regulation control device and method. Background Art

[0002] In modern life, as people pay more and more attention to health, oxygen concentrators, as important equipment for family health care, are gradually entering thousands of households. Portable pulse oxygen concentrators, because of their small size, lightness and ease of carrying, have become a must-have for more and more people who need oxygen when going out.

[0003] Traditional oxygen concentrators continuously output oxygen, and the output oxygen volume is constant under normal conditions. However, the pulse mode uses a micro-pressure differential sensor to sense the user's breathing frequency, allowing the oxygen concentrator to adapt to the user's breathing rhythm, control the single oxygen output, and improve oxygen supply efficiency. For oxygen concentrator systems that run for a long time and have different oxygen supply requirements, it is often the case that the system's oxygen production volume is greater than the oxygen absorption volume. At this time, it is necessary to adjust the gas volume inside the oxygen concentrator system to maintain the system pressure stable while achieving the purpose of economical and efficient oxygen production.

[0004] Through the above analysis, the problems and defects of the prior art are as follows:

[0005] Traditional oxygen generators continuously output oxygen, and the output oxygen volume remains constant under normal conditions. There is no correlation and adaptive adjustment between the compressed gas source volume and the oxygen production volume of the oxygen production system. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a scroll compressor-oxygen generator gas volume combined adaptive regulation control device and method.

[0007] The present invention is implemented as follows: a scroll compressor-oxygen generator gas volume combined adaptive regulation control method, comprising:

[0008] Step 1: The sensor acquisition module collects the compressor outlet temperature t, pressure p and flow signal Q outlet, and sends them to the control module in the form of a pulse signal;

[0009] Step 2, the programmable logic controller PLC in the control module filters and processes the received pulse signal and transmits it to the PID control unit;

[0010] Step 3, determine whether the absolute value of the difference between the pulse signal and the required value exceeds 3%, and calculate according to the actual operation situation;

[0011] The following situations generally exist:

[0012] a. When the outlet temperature t>40℃, the power supply frequency f is reduced by 5%, and the motor speed n decreases until the outlet temperature t drops to around 40℃;

[0013] b. When the pressure p>0.15Mpa, the power supply frequency f decreases by 5%, and the motor speed n decreases until the pressure p drops to around 0.15Mpa;

[0014] c. Q 出气 There is a certain value in each gear. When ΔQ / Q 出气 >3%, the motor is dynamically adjusted by 5% each time according to formulas (1), (2), and (3) until ΔQ / Q 出气 =3%;

[0015] Step 4: The oxygen concentration sensor detects the output oxygen concentration at this time and controls the oxygen concentration to be 93±3%. If it does not meet the requirements, repeat the process in step 3 until the control module finally outputs an execution signal.

[0016] Furthermore, the sensor acquisition module outputs signals such as temperature, pressure, flow pulse, etc. of the oil-free compressor to the sensor acquisition module.

[0017] Furthermore, the signal collected by the sensor collection module is sent to the signal processing circuit, and the signal processing circuit sends the pulse signal to the control module.

[0018] Furthermore, the PLC control unit in the control module converts the received pulse adjustment signal into a duration signal, which is filtered by a filter and then transmitted to the PID control loop. The control module 3 transmits the execution signal to the execution module.

[0019] Furthermore, the governor feedback unit in the execution module controls the power supply frequency f of the compressor motor, the air flow rate and the motor speed, and the following relationship exists:

[0020]

[0021] ΔQ=Q 出气 -Q 实际使用 (3)

[0022] Among them, f is the compressor power supply frequency, s is the slip rate, p is the number of motor pole pairs, λ is the flow coefficient, Q is the actual air output, Q 出气 is the actual air output of the compressor, Q 实际使用 It is the actual usage of the compressor at this gear.

[0023] Furthermore, the control valve feedback unit in the execution module has the following relationship:

[0024]

[0025] Δp=p1-p2 (5)

[0026] Q 孔 =Q 实际使用 (6)

[0027] Among them, C is the air flow coefficient, A is the orifice cross-sectional area, Δp is the pressure difference before and after the orifice, and ρ is the air density;

[0028] The pressure equalizing valve feedback unit in the execution module controls the opening time of the pressure equalizing valve, and the following relationship exists:

[0029] ΔT1=t1-t2 (7)

[0030] The A and B valve feedback units in the execution module 4 control the opening time of the A and B valves, and the following relationship exists:

[0031] ΔT2=t3-t4 (8)

[0032] The pulse valve feedback unit in the execution module 4 controls the pulse valve opening time, and the following relationship exists:

[0033] ΔT3=t5-t6 (9).

[0034] Another object of the present invention is to provide a scroll compressor-oxygen generator gas volume combined adaptive regulation control device comprising:

[0035] Oxygen production module, sensor acquisition module, control module, execution module;

[0036] The oxygen production module includes an air filter assembly, a speed regulator, an oil-free scroll compressor, a cooling fan, a control valve, a molecular sieve tower, a pressure equalizing valve, and a pulse valve; the sensor acquisition module includes a temperature acquisition module, a pressure acquisition module, and a flow acquisition module; the control module includes a PLC control unit and a PID control unit; the execution module includes a speed regulator feedback unit, a control valve feedback unit, a pressure equalizing valve feedback unit, and a pulse valve feedback unit;

[0037] The sensor acquisition module is used to output the temperature, pressure, flow pulse and other signals of the oil-free compressor to the sensor acquisition module; the collected signals are sent to the signal processing circuit, and the signal processing circuit sends the pulse signal to the control module;

[0038] The control module is used to convert the received pulse adjustment signal into a duration signal through the PLC control unit, and after filtering, transmit it to the PID control loop. The control module transmits the execution signal to the execution module;

[0039] The execution module is used to control the power supply frequency f, the outlet air flow rate and the motor speed of the compressor motor through the speed regulator feedback unit.

[0040] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0041] First, after receiving the signal, the actuator of the present invention timely controls the opening time of the solenoid valve in the actuator, thereby adjusting the gas source from the compressor module to achieve continuous regulation of the flow rate of the oxygen production system. Since the indicated power consumption of the compressor is proportional to the actual oxygen production flow rate, the scroll compressor-oxygen generator gas volume joint regulation system can save energy consumption to the maximum extent.

[0042] The scroll compressor in the present invention is different from the conventional piston compressor. Its compression process is continuous, and its gas delivery volume can be changed by variable speed regulation method. It is suitable for occasions where the speed changes in a wide range, and the maintenance cost is low. Therefore, the scroll compressor-oxygen generator gas volume joint adaptive regulation can be realized.

[0043] In the present invention, when the oxygen production capacity is greater than the oxygen absorption capacity, the unused oxygen can be throttled or directly refluxed through the air inlet of the scroll compressor to be recycled in the next step. This method can effectively utilize the surplus gas, reduce energy consumption, and improve the gas utilization rate in the oxygen production system.

[0044] Second, the technical problems solved by the technical solution of the present invention in industrial applications are:

[0045] The scroll compressor-oxygen generator gas volume combined adaptive regulation control device of the present invention proposes a new integrated dynamic feedback control oxygen production solution to address the deficiencies of the prior art in oxygen production efficiency, stability, adaptability and energy consumption management, and solves the following major technical problems:

[0046] 1) Low oxygen production efficiency

[0047] In existing oxygen production devices, the air flow rate, compression ratio and adsorption process parameters are not flexibly adjusted, resulting in low molecular sieve efficiency and large fluctuations in oxygen concentration, especially poor performance when demand changes.

[0048] The present invention realizes real-time monitoring and precise adjustment through a dynamic feedback control module (including a sensor acquisition module, a PLC and a PID control unit), ensures synchronous optimization of air flow rate and molecular sieve switching, significantly improves oxygen production efficiency, and stabilizes oxygen concentration within a set range (such as 93%-95.6%).

[0049] 2) Problems of pressure fluctuation and unstable transmission

[0050] In existing devices, the pressure control system responds slowly and the molecular sieve switches late or too early, resulting in large fluctuations in oxygen output flow and pressure, affecting the normal operation of downstream equipment.

[0051] The present invention uses feedback control of pressure sensors and pressure equalizing valves to quickly respond to pressure changes, accurately adjust the compressor speed and molecular sieve switching time, ensure output flow and pressure stability, and meet the needs of high-precision industrial and medical applications.

[0052] 3) High energy consumption of equipment operation

[0053] In traditional oxygen production equipment, the compressor and valve have a single working mode and cannot adjust the operating status according to the actual oxygen demand, resulting in serious energy waste.

[0054] The present invention uses PID feedback control to adjust the compressor output, valve switching frequency and working mode according to real-time needs, thereby achieving accurate oxygen supply while reducing power consumption, saving energy while ensuring performance.

[0055] 4) Poor adaptability

[0056] Existing technologies cannot adapt to dynamically changing oxygen demands, such as the need for rapid response in medical emergency scenarios or the need for large-flow stable oxygen supply due to industrial load changes.

[0057] The present invention uses dynamic feedback control combined with multi-point sensor data collection to quickly adjust equipment operating parameters, can flexibly respond to a variety of usage scenarios, and improve system adaptability and reliability.

[0058] The significant technical progress achieved by the present invention in industrial applications is reflected in the following aspects:

[0059] 1) Efficient oxygen production and stability are greatly improved

[0060] Dynamic feedback control is adopted to collect multi-dimensional data such as temperature, pressure, flow, etc. in real time through sensors. Combined with PLC and PID control algorithms, the compressor speed and molecular sieve switching time are accurately adjusted, which significantly improves the oxygen production efficiency and oxygen concentration stability.

[0061] Compared with traditional equipment, the present invention can control the fluctuation range of oxygen concentration to ±1%, and can provide a stable oxygen supply with high flow and high pressure through the dynamic boosting function during peak demand periods.

[0062] 2) Intelligent operation and energy consumption optimization

[0063] The present invention automatically adjusts the operating state through the intelligent control module and the speed regulator feedback unit to realize on-demand oxygen supply. Compared with traditional equipment, it reduces energy consumption by about 20%-30%, and is particularly suitable for scenarios with high requirements for energy saving and environmental protection.

[0064] In addition, the efficient cooperation between the pressure equalizing valve and the pulse valve reduces the switching loss of the molecular sieve tower and further optimizes the energy consumption structure.

[0065] 3) Rapid response and enhanced adaptability

[0066] The present invention can adjust the compressor output and molecular sieve switching frequency within seconds to achieve rapid response. It is suitable for scenarios with dynamically changing demands (such as medical emergency, industrial cutting, etc.), meeting users' high requirements for real-time performance and reliability.

[0067] The system supports modular expansion and can adapt to application requirements of different scales and scenarios, such as small medical institutions, large industrial oxygen production systems, etc., significantly improving the application scope of the equipment.

[0068] 4) Reduced noise and maintenance costs

[0069] The present invention adopts an oil-free scroll compressor and an intelligent control module, which effectively reduces equipment vibration and noise pollution, reduces the noise level to below 50dB(A), and significantly improves the working environment.

[0070] At the same time, through the intelligent feedback system, the equipment runs more smoothly, reduces component wear, extends equipment life, and reduces maintenance costs.

[0071] 5) Flexibility to support multiple scenarios

[0072] The present invention is compatible with the scenario requirements of small-scale medical oxygen production (low flow, high concentration oxygen demand) and industrial oxygen production (high flow, continuous oxygen supply demand). The system configuration is flexible and different performance goals can be easily achieved through adjustment modules, demonstrating superior versatility and market adaptability.

[0073] By solving the key problems of low oxygen production efficiency, pressure fluctuation, high energy consumption and poor adaptability in the prior art, the present invention has the following significant advantages in industrial applications:

[0074] 1. Improve oxygen production efficiency and oxygen concentration stability;

[0075] 2. Optimize energy consumption and reduce operating costs;

[0076] 3. Quickly respond to changes in demand and adapt to multi-scenario applications;

[0077] 4. Reduce noise and maintenance costs and extend equipment life.

[0078] The technical solution of the present invention significantly improves the intelligence level of oxygen production equipment, provides efficient, reliable and energy-saving solutions for medical, industrial and other fields, and has outstanding technical advantages in market competition. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a flow chart of a scroll compressor-oxygen generator gas volume joint adaptive regulation control method provided in an embodiment of the present invention.

[0080] Figure 2 It is a structural block diagram of a scroll compressor-oxygen generator gas volume combined adaptive regulation control device provided in an embodiment of the present invention.

[0081] Figure 3 It is a system control flow chart provided by an embodiment of the present invention.

[0082] Figure 4 It is a schematic diagram of a gas source throttling and oxygen circulation system provided in an embodiment of the present invention.

[0083] In the figure: 1. Oxygen production module; 2. Sensor acquisition module; 3. Control module; 4. Execution module; 11. Air filter assembly; 12. Speed ​​regulator; 13. Oil-free scroll compressor; 14. Cooling fan; 15. Control valve; 16. Molecular sieve tower; 17. Pressure equalizing valve; 18. Pulse valve; 21. Temperature acquisition module; 22. Pressure acquisition module; 23. Flow acquisition module; 31. PLC control unit; 32. PID control unit; 41. Speed ​​regulator feedback unit; 42. Control valve feedback unit; 43. Pressure equalizing valve feedback unit; 44. Pulse valve feedback unit. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0085] like Figure 1 As shown, a scroll compressor-oxygen generator gas volume joint adaptive regulation control method provided by an embodiment of the present invention comprises the following steps:

[0086] S101, the sensor acquisition module collects the compressor outlet temperature t, pressure p and flow signal Q 出气 , sent to the control module in the form of a pulse signal;

[0087] S102, the programmable logic controller PLC in the control module filters and processes the received pulse signal and transmits it to the PID control unit;

[0088] S103, determining whether the absolute value of the difference between the pulse signal and the required value exceeds 3%, and performing calculations based on actual operating conditions;

[0089] The following situations generally exist:

[0090] a. When the outlet temperature t>40℃, the power supply frequency f is reduced by 5%, and the motor speed n decreases until the outlet temperature t drops to around 40℃;

[0091] b. When the pressure p>0.15Mpa, the power supply frequency f decreases by 5%, and the motor speed n decreases until the pressure p drops to around 0.15Mpa;

[0092] c. Q 出气 There is a certain value in each gear. When ΔQ / Q 出气 >3%, the motor is dynamically adjusted by 5% each time according to formulas (1), (2), and (3) until ΔQ / Q 出气 =3%;

[0093] S104, the oxygen concentration sensor detects the output oxygen concentration at this time and controls the oxygen concentration to be 93±3%. If it does not meet the requirements, the S103 process is repeated until the control module finally outputs an execution signal.

[0094] The sensor acquisition module provided in the embodiment of the present invention outputs signals such as temperature, pressure, flow pulse, etc. of the oil-free compressor to the sensor acquisition module.

[0095] The signal collected by the sensor collection module provided in the embodiment of the present invention is sent to the signal processing circuit, and the signal processing circuit sends the pulse signal to the control module.

[0096] The PLC control unit in the control module provided in the embodiment of the present invention converts the received pulse adjustment signal into a duration signal, which is filtered by a filter and then transmitted to the PID control loop. The control module 3 transmits the execution signal to the execution module.

[0097] The governor feedback unit in the execution module provided in the embodiment of the present invention controls the power supply frequency f of the compressor motor, the outlet air flow rate and the motor speed, and the following relationship exists:

[0098]

[0099] ΔQ=Q 出气 -Q 实际使用 3)

[0100] Among them, f is the compressor power supply frequency, s is the slip rate, p is the number of motor pole pairs, λ is the flow coefficient, Q is the actual air output, Q 出气 is the actual air output of the compressor, Q 实际使用 It is the actual usage of the compressor at this gear.

[0101] The control valve feedback unit in the execution module provided in the embodiment of the present invention has the following relationship:

[0102]

[0103] Δp=p1-p2 (5)

[0104] Q 孔 =Q实际使用 (6)

[0105] Among them, C is the air flow coefficient, A is the orifice cross-sectional area, Δp is the pressure difference before and after the orifice, and ρ is the air density;

[0106] The pressure equalizing valve feedback unit in the execution module controls the opening time of the pressure equalizing valve, and the following relationship exists:

[0107] ΔT1=t1-t2 (7)

[0108] The A and B valve feedback units in the execution module 4 control the opening time of the A and B valves, and the following relationship exists:

[0109] ΔT2=t3-t4 (8)

[0110] The pulse valve feedback unit in the execution module 4 controls the pulse valve opening time, and the following relationship exists:

[0111] ΔT3=t5-t6 (9).

[0112] like Figure 2 , 4 As shown, a scroll compressor-oxygen generator gas volume combined adaptive regulation control device provided by an embodiment of the present invention includes:

[0113] Oxygen production module 1, sensor acquisition module 2, control module 3, execution module 4;

[0114] The oxygen production module 1 includes an air filter assembly 11, a speed regulator 12, an oil-free scroll compressor 13, a cooling fan 14, a control valve 15, a molecular sieve tower 16, a pressure equalizing valve 17, and a pulse valve 18;

[0115] The sensor acquisition module 2 includes a temperature acquisition module 21, a pressure acquisition module 22, and a flow acquisition module 23;

[0116] The control module 3 includes a PLC control unit 31 and a PID control unit 32;

[0117] The execution module 4 includes a speed regulator feedback unit 41 , a control valve feedback unit 42 , a pressure equalizing valve feedback unit 43 , and a pulse valve feedback unit 44 .

[0118] The sensor acquisition module 2 is used to output the temperature, pressure, flow pulse and other signals of the oil-free compressor to the sensor acquisition module; the collected signals are sent to the signal processing circuit, and the signal processing circuit sends the pulse signal to the control module;

[0119] The control module 3 is used to convert the received pulse adjustment signal into a duration signal through the PLC control unit, and after filtering, transmit it to the PID control loop. The control module transmits the execution signal to the execution module;

[0120] The execution module 4 is used to control the power supply frequency f, the air outlet flow rate and the motor speed of the compressor motor through the speed regulator feedback unit.

[0121] The sensor acquisition module 2 is distributed on the key components of the scroll compressor-oxygen generator, including a temperature acquisition module 21, a pressure acquisition module 22 and a flow acquisition module (23. These modules monitor the operating parameters of the oil-free scroll compressor (13) and the oxygen generator module in real time, including air temperature, pressure and flow. The collected signals are digitized by the signal processing circuit, and the analog signals are converted into pulse signals that can be used by the control module 3, and these pulse signals are transmitted to the control module to provide a data basis for subsequent gas volume regulation.

[0122] The control module 3 receives the pulse signal from the sensor acquisition module and converts the pulse signal into a duration signal indicating the operating state through the PLC control unit 31. After being processed by the filter, the signal enters the PID control unit 32 for dynamic calculation of the required adjustment parameters. The PID control unit performs closed-loop control of various indicators in the oxygen production process, including adjusting the speed of the compressor motor, gas flow and temperature parameters to ensure that the equipment performs oxygen separation and supply in the best operating state.

[0123] The execution module 4 adjusts the power supply frequency f of the motor of the oil-free scroll compressor 13 through the speed regulator feedback unit 41 according to the adjustment signal transmitted by the control module, thereby controlling the operating speed and output gas volume of the compressor. At the same time, the control valve feedback unit 42, the pressure equalizing valve feedback unit 43 and the pulse valve feedback unit 44 respectively adjust the opening and closing degree and time of the relevant valves, optimize the flow and separation process of the gas in the molecular sieve tower 16, and ensure that the concentration and flow of oxygen are stable at the set value.

[0124] The execution module returns the real-time operating parameters to the control module through the feedback unit to form a closed-loop control mechanism. The control module dynamically optimizes the compressor power supply frequency, the gas separation process in the molecular sieve tower and the coordination of exhaust gas emissions based on the feedback signal. The entire system automatically adapts to changes in external conditions (such as ambient temperature, pressure fluctuations, etc.) through the linkage of sensors, control modules and execution modules, realizes the joint adaptive adjustment of the scroll compressor-oxygen generator gas volume, and improves oxygen production efficiency and equipment stability.

[0125] The present invention is specifically implemented:

[0126] The present invention is implemented as follows: a scroll compressor-oxygen generator gas volume joint regulation and control device includes an oxygen production module 1, a sensor acquisition module 2, a control module 3, and an execution module 4;

[0127] The oxygen production module 1 includes an air filter assembly 11, a speed regulator 12, an oil-free scroll compressor 13, a cooling fan 14, a control valve 15, a molecular sieve tower 16, a pressure equalizing valve 17, and a pulse valve 18;

[0128] The sensor acquisition module 2 includes a temperature acquisition module 21, a pressure acquisition module 22, and a flow acquisition module 23;

[0129] The control module 3 includes a PLC control unit 31 and a PID control unit 32;

[0130] The execution module 4 includes a speed regulator feedback unit 41 , a control valve feedback unit 42 , a pressure equalizing valve feedback unit 43 , and a pulse valve feedback unit 44 .

[0131] like Figure 3 Another object of the present invention is to provide a scroll compressor-oxygen generator gas volume joint regulation and control method, comprising:

[0132] The oxygen generator oxygen module 1 is turned on, and the air passes through the air filter assembly 11, the speed regulator 12, the oil-free scroll compressor 13, the cooling fan 14, the control valve 15, the molecular sieve tower 16, the pressure equalizing valve 17, and the pulse valve 18 in sequence, forming a set of oxygen production process;

[0133] The sensor acquisition module 2 outputs the temperature, pressure, flow pulse and other signals of the oil-free compressor 13 to the sensor acquisition module;

[0134] The temperature sensor collects the motor temperature t of the oil-free compressor 21;

[0135] The pressure sensor collects the pressure p at the outlet of the compressor 22;

[0136] The flow sensor collects the flow rate Q at the outlet of the oil-free compressor 23 出气 ;

[0137] The signal collected by the sensor acquisition module 2 is sent to the signal processing circuit;

[0138] The signal processing circuit sends the pulse signal to the control module 3;

[0139] The PLC control unit in the control module 3 converts the received pulse adjustment signal into a duration signal, which is filtered by a filter and then transmitted to the PID control loop;

[0140] The control module 3 transmits the execution signal to the execution module 4;

[0141] The governor feedback unit in the execution module 4 controls the power supply frequency f of the compressor motor, the air flow rate and the motor speed, and the following relationship exists:

[0142]

[0143] ΔQ=Q 出气 -Q 实际使用 (3)

[0144] Among them, f is the compressor power supply frequency, s is the slip rate, p is the number of motor pole pairs, λ is the flow coefficient, Q is the actual air output, Q 出气 is the actual air output of the compressor, Q 实际使用 It is the actual usage of the compressor at this gear.

[0145]

[0146] Δp=p1-p2 (5)

[0147] Q 孔 =Q 实际使用 (6)

[0148] The control valve feedback unit in the execution module has the following relationship:

[0149] Among them, C is the air flow coefficient, A is the orifice cross-sectional area, Δp is the pressure difference before and after the orifice, and ρ is the air density.

[0150] The pressure equalizing valve feedback unit in the execution module 4 controls the opening time of the pressure equalizing valve, and the following relationship exists:

[0151] ΔT1=t1-t2 (7)

[0152] S13: Further, the A and B valve feedback units in the execution module 4 control the opening time of the A and B valves, and the following relationship exists:

[0153] ΔT2=t3-t4 (8)

[0154] The pulse valve feedback unit in the execution module 4 controls the pulse valve opening time, and the following relationship exists:

[0155] ΔT3=t5-t6 (9).

[0156] The core of the oxygen production module includes an air filter assembly 11, a speed regulator 12, an oil-free scroll compressor 13 and a cooling fan 14. After being filtered by the air filter assembly 11, the air enters the speed regulator 12, and the speed regulator adjusts the air flow rate according to the instructions of the control module. The air passing through the speed regulator is compressed into high-pressure air by the oil-free scroll compressor 13. At the same time, the cooling fan 14 is responsible for heat dissipation to ensure that the temperature of the compressed air is maintained within the set range of the equipment.

[0157] The compressed high-pressure air enters the molecular sieve tower 16, and the oxygen and nitrogen are separated by the adsorbent in the molecular sieve tower. The control valve 15 adjusts the gas flow direction to maintain the stability of the separation process. The high-concentration oxygen produced is discharged through the equalizing valve 17, and the exhaust gas is discharged through the pulse valve 18. The coordination between the equalizing valve and the pulse valve is adjusted in real time through the control module to ensure the oxygen production efficiency and gas quality.

[0158] The temperature acquisition module 21, the pressure acquisition module 22 and the flow acquisition module 23 are distributed in key positions of the oxygen production module to collect the temperature, pressure and flow data of the air in real time. These data are transmitted to the control module through the sensor acquisition module to form a dynamic feedback signal of the system operation and support accurate oxygen production control.

[0159] The control module is composed of a PLC control unit 31 and a PID control unit 32. The PLC unit receives real-time data from the sensor module, determines the current operating status of the device, and sends instructions to each execution module. The PID control unit optimizes and adjusts parameters based on real-time feedback signals, such as controlling the speed of the speed regulator 12 or the opening degree of the equalizing pressure valve 17, thereby accurately controlling the oxygen production process.

[0160] The execution module includes a speed regulator feedback unit 41, a control valve feedback unit 42, a pressure equalizing valve feedback unit 43 and a pulse valve feedback unit 44. These feedback units monitor the operating status of the corresponding components respectively and transmit the operating parameters to the control module, so that the system can dynamically adjust the operating strategy according to the real-time feedback to ensure the efficient and stable operation of the equipment.

[0161] The entire system realizes cyclic operation through the coordination of the control module. The air goes through multiple steps such as filtration, compression, separation, oxygen production, and exhaust gas discharge. The coordinated optimization of the data acquisition module and the control module ensures the stable operation of the system under dynamic conditions. At the same time, the feedback mechanism of the execution module provides the closed-loop adjustment capability of the operating status, so that the equipment can not only meet the changes in oxygen demand, but also maintain efficient oxygen production capacity under environmental changes or equipment aging conditions.

[0162] Example 1: Dynamic feedback high-efficiency oxygen generator for small medical institutions

[0163] Device configuration:

[0164] 1) Oxygen production module:

[0165] Air filtration component (11): uses a high-efficiency HEPA filter to ensure that 99.9% of particulate matter in the external air is removed.

[0166] Speed ​​regulator (12): Equipped with a high-precision variable frequency speed regulator, the flow rate can be adjusted in the range of 10-50L / min.

[0167] Oil-free scroll compressor (13): rated power 5.5 kW, maximum output pressure 0.8 MPa, suitable for small and medium-sized medical environments.

[0168] Molecular sieve tower (16): a double tower structure, filled with molecular sieve material 13X, used to separate nitrogen from the air, with an oxygen concentration of more than 95%.

[0169] The pressure equalizing valve (17) and the pulse valve (18) support cyclic adsorption switching to ensure efficient oxygen separation.

[0170] 2) Sensor acquisition module:

[0171] Temperature collection module (21): arranged at the entrance of the molecular sieve tower, to monitor the air temperature in real time (range 0-50°C).

[0172] Pressure acquisition module (22): installed at the output end of the scroll compressor to monitor the high-pressure air pressure and ensure that it does not exceed 0.8MPa.

[0173] Flow acquisition module (23): monitors oxygen flow in the range of 1-10 L / min.

[0174] 3) Control module:

[0175] PLC control unit (31): receives real-time data from sensors, processes signals and sends instructions.

[0176] PID control unit (32): dynamically adjusts the speed regulator and valve switch status to maximize oxygen production efficiency.

[0177] 4) Execution module:

[0178] Speed ​​governor feedback unit (41): adjusts the speed of the scroll compressor in real time to respond to air flow demand.

[0179] Control valve feedback unit (42): adjusts the intake air volume according to the pressure signal to maintain a stable oxygen output.

[0180] Workflow:

[0181] Medical institutions set oxygen flow target values ​​based on demand.

[0182] The control module adjusts the scroll compressor speed and the pressure equalizing valve switching time in real time through PID feedback.

[0183] When oxygen demand is high, the device automatically increases compressor speed and flow; when demand is low, it reduces operating frequency.

[0184] The equipment has a built-in automatic alarm system, which triggers an audible and visual alarm when the oxygen concentration is lower than 93% or the system pressure is abnormal.

[0185] Example 2: Dynamic feedback high-efficiency oxygen generator for industrial cutting

[0186] Device configuration:

[0187] 1) Oxygen production module:

[0188] Air filter assembly (11): Industrial grade filter, high pressure resistant design, capable of filtering particulate matter and oil mist.

[0189] Speed ​​regulator (12): Industrial speed regulator, supporting large flow adjustment (50-200L / min).

[0190] Oil-free scroll compressor (13): rated power ≥5.5kW, output pressure 1.5MPa, used to meet the high-pressure oxygen demand of cutting equipment.

[0191] Molecular sieve tower (16): four-tower structure, enhanced molecular sieve filler, oxygen concentration reaches 95.6%.

[0192] Pressure equalizing valve (17) and pulse valve (18): High-speed response design, supporting high-frequency switching and optimizing the cyclic adsorption process.

[0193] 2) Sensor acquisition module:

[0194] Temperature acquisition module (21): installed at the interface between the compressor and the molecular sieve tower, monitoring temperature range -10°C to 70°C.

[0195] Pressure acquisition module (22): distributed at the compressor outlet and the molecular sieve tower outlet, monitoring the dual-point pressure in the range of 0-2MPa.

[0196] Flow acquisition module (23): monitors the oxygen output flow rate in the range of 10-200 L / min.

[0197] 3) Control module:

[0198] PLC control unit (31): supports multi-parameter parallel processing and quickly responds to pressure and flow fluctuations.

[0199] PID control unit (32): dynamically adjusts compressor output and valve switching frequency according to load changes of industrial cutting equipment.

[0200] 4) Execution module:

[0201] Speed ​​governor feedback unit (41): dynamically controls compressor output according to pressure demand to optimize energy consumption.

[0202] Control valve feedback unit (42): adjusts the inlet pressure to ensure the stability of the molecular sieve adsorption performance.

[0203] Workflow:

[0204] When industrial equipment is started, the oxygen generator is turned on at the default pressure (1MPa) to quickly supply oxygen to the equipment.

[0205] When the load increases, the control module dynamically increases the compressor speed and adjusts the switching frequency of the molecular sieve tower to ensure that the oxygen flow and concentration meet the requirements.

[0206] The equipment supports 24-hour high-intensity continuous operation, and uses the feedback module to adjust operating parameters in real time to avoid overload and energy waste.

[0207] Built-in maintenance reminder system regularly checks the status of filter components and molecular sieve towers, prompting users to replace or maintain them.

[0208] The above two embodiments are respectively aimed at medical and industrial application scenarios, demonstrating the flexibility and efficiency of dynamic feedback control under different requirements. Through the coordinated work of the sensor acquisition module, the control module and the execution module, the precise output of high-concentration oxygen is achieved, and the energy consumption and equipment stability are significantly optimized.

[0209] The following is a detailed description of the scroll compressor-oxygen generator gas volume combined adaptive regulation control device and method.

[0210] Working principle:

[0211] The main function of the oxygen production module is to convert external air into high-concentration oxygen. First, the air is filtered through the air filter assembly 11 to remove impurities and pollutants. After the filtered air is regulated by the speed regulator 12, it enters the oil-free scroll compressor 13, where it is compressed into high-pressure air. The compressed air passes through the molecular sieve tower 16, where oxygen and nitrogen are separated, and finally a high-concentration oxygen is obtained. The airflow is adjusted by the pressure equalizing valve 17 and the pulse valve 18 to ensure stable oxygen output.

[0212] The sensor acquisition modules 21, 22, 23 include temperature, pressure and flow sensors, which are installed at key positions of the oxygen production module to collect air temperature, pressure and flow parameters in real time. These collected data are transmitted to the control module in the form of pulse signals for further calculation and adjustment.

[0213] The control module consists of a PLC control unit 31 and a PID control unit 32. It receives data from the sensor acquisition module, analyzes the data, and controls the operation of execution modules such as the governor, control valve, and pressure equalizing valve. The control module dynamically adjusts the working state of each component through the PID control algorithm to ensure that the concentration and flow of oxygen remain within the predetermined range.

[0214] The feedback units of the execution modules 41, 42, 43, and 44 monitor the operating status of the speed regulator, control valve, equalizing valve, and pulse valve in real time, and transmit this information back to the control module. These feedback signals help the control module make immediate adjustments to ensure the stable operation of the system. Through the feedback mechanism, the system can automatically adjust when the temperature, pressure, or flow is abnormal to ensure that the equipment operates in the best condition.

[0215] According to the data from the sensor acquisition module, the control module makes dynamic adjustments by judging the deviation between the temperature, pressure or flow and the required value. For example, when the outlet temperature exceeds 40°C, the control module will reduce the power supply frequency and motor speed until the temperature returns to near the set value; similarly, when the pressure exceeds 0.15MPa, the system will automatically reduce the motor speed to keep the pressure within the normal range. When the outlet flow deviation exceeds the set value, the system will dynamically adjust the motor speed to ensure that the flow matches the demand.

[0216] In the process of controlling oxygen concentration, the oxygen concentration sensor monitors the actual concentration of oxygen. The control module will automatically adjust the system parameters according to the deviation between the oxygen concentration and the target concentration to keep the oxygen concentration within the range of 93±3%. If the concentration does not meet the requirements, the system will re-adjust the temperature, pressure, and flow until the set oxygen concentration is reached.

[0217] In the execution module, the speed regulator feedback unit controls the power supply frequency, air flow rate and speed of the motor. The relationship between the speed regulator and the motor speed is based on the dynamic adjustment method in formula (1). When the air volume changes, the motor will dynamically adjust the speed in proportion to ensure that the flow rate matches the demand.

[0218] The control valve feedback unit is responsible for adjusting the opening and closing of the control valve to ensure unimpeded airflow and avoid airflow fluctuations caused by inappropriate valve status. The pressure equalizing valve feedback unit adjusts the opening time of the pressure equalizing valve according to pressure changes to maintain the balance of airflow.

[0219] The function of the pulse valve feedback unit is to adjust the opening time of the pulse valve according to the needs of the system and control the precise release of the pulse flow. The precise control of the pulse valve is essential to maintain the stability of the gas flow, especially during the oxygen output process, where pulse adjustment can ensure the precise control of the gas flow rate.

[0220] Through the description of the above working principle, the scroll compressor-oxygen generator gas volume combined adaptive adjustment control device and method of the present invention realizes dynamic monitoring and real-time adjustment of various parts of the system, thereby ensuring the stable output of oxygen concentration and improving the oxygen production efficiency and the operational reliability of the system.

[0221] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0222] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A scroll compressor-oxygen generator gas volume combined adaptive regulation control device, characterized in that: It includes an oxygen production module, a sensor acquisition module, a control module and an execution module; The oxygen production module comprises an air filter assembly (11), a speed regulator (12), an oil-free scroll compressor (13), a cooling fan (14), a control valve (15), a molecular sieve tower (16), a pressure equalizing valve (17) and a pulse valve (18). External air is filtered by the air filter assembly (11), and after the flow rate is adjusted by the speed regulator (12), the oil-free scroll compressor (13) compresses the air to form high-pressure air, and the high-concentration oxygen is obtained by separation through the molecular sieve tower (16); The sensor acquisition module comprises a temperature acquisition module (21), a pressure acquisition module (22) and a flow acquisition module (23), which are respectively distributed at key positions of the oxygen production module and are used to collect the temperature, pressure and flow parameters of the air in real time; The control module comprises a PLC control unit (31) and a PID control unit (32), which receives data transmitted by the sensor acquisition module and sends control instructions to the execution module; The execution module comprises a speed regulator feedback unit (41), a control valve feedback unit (42), a pressure equalizing valve feedback unit (43) and a pulse valve feedback unit (44), and is used to monitor the operating status of corresponding components in real time and provide feedback signals.

2. The scroll compressor-oxygen generator gas volume combined adaptive regulation control device according to claim 1, characterized in that: The control module dynamically adjusts the speed of the speed regulator (12), the opening and closing time of the control valve (15), and the coordination between the pressure equalizing valve (17) and the pulse valve (18) through the PID control unit (32) to optimize the oxygen and nitrogen separation process of the molecular sieve tower (16) and ensure the oxygen production efficiency and oxygen concentration stability.

3. The scroll compressor-oxygen generator gas volume combined adaptive regulation control device according to claim 1, characterized in that: The execution module transmits the working status of the speed regulator (12), the control valve (15), the pressure equalizing valve (17) and the pulse valve (18) to the PLC control unit (31) of the control module in real time through the feedback unit, thereby realizing closed-loop monitoring of the equipment operating status and automatically adjusting the operating parameters when the air flow rate, temperature or pressure is abnormal.

4. A scroll compressor-oxygen generator gas volume joint adaptive regulation control method, characterized in that: The scroll compressor-oxygen generator gas volume joint adaptive regulation control method comprises the following steps: Step 1: The sensor acquisition module collects the compressor outlet temperature t, pressure p and flow signal Q outlet, and sends them to the control module in the form of a pulse signal; Step 2, the programmable logic controller PLC in the control module filters and processes the received pulse signal and transmits it to the PID control unit; Step 3, determine whether the absolute value of the difference between the pulse signal and the required value exceeds 3%, and calculate according to the actual operation situation; The following situations generally exist: a. When the outlet temperature t>40℃, the power supply frequency f is reduced by 5%, and the motor speed n decreases until the outlet temperature t drops to around 40℃; b. When the pressure p>0.15Mpa, the power supply frequency f decreases by 5%, and the motor speed n decreases until the pressure p drops to around 0.15Mpa; c. Q 出气 There is a certain value in each gear. When ΔQ / Q 出气 >3%, the motor is dynamically adjusted by 5% each time according to formulas (1), (2), and (3) until ΔQ / Q 出气 =3%; Step 4: The oxygen concentration sensor detects the output oxygen concentration at this time and controls the oxygen concentration to be 93±3%. If it does not meet the requirements, repeat the process in step 3 until the control module finally outputs an execution signal.

5. The scroll compressor-oxygen generator gas volume combined adaptive regulation control method according to claim 4, characterized in that: The sensor acquisition module outputs signals such as temperature, pressure, flow pulse, etc. of the oil-free compressor to the sensor acquisition module.

6. The scroll compressor-oxygen generator gas volume combined adaptive regulation control method according to claim 4, characterized in that: The signal collected by the sensor collection module is sent to the signal processing circuit, and the signal processing circuit sends the pulse signal to the control module.

7. The scroll compressor-oxygen generator gas volume combined adaptive regulation control method according to claim 4, characterized in that: The PLC control unit in the control module converts the received pulse adjustment signal into a duration signal, which is filtered by a filter and then transmitted to the PID control loop. The control module 3 transmits the execution signal to the execution module.

8. The scroll compressor-oxygen generator gas volume combined adaptive regulation control method according to claim 4, characterized in that: The governor feedback unit in the execution module controls the power supply frequency f of the compressor motor, the air flow rate and the motor speed, and the following relationship exists: ΔQ=Q 出气 -Q 实际使用 (3) Among them, f is the compressor power supply frequency, s is the slip rate, p is the number of motor pole pairs, λ is the flow coefficient, Q is the actual air output, Q 出气 is the actual air output of the compressor, Q 实际使用 It is the actual usage of the compressor at this gear.

9. The scroll compressor-oxygen generator gas volume combined adaptive regulation control method according to claim 4, characterized in that: The control valve feedback unit in the execution module has the following relationship: Δp=p1-p2 (5) Q 孔 =Q 实际使用 (6) Among them, C is the air flow coefficient, A is the orifice cross-sectional area, Δp is the pressure difference before and after the orifice, and ρ is the air density; The pressure equalizing valve feedback unit in the execution module controls the opening time of the pressure equalizing valve, and the following relationship exists: ΔT1=t1-t2 (7) The A and B valve feedback units in the execution module 4 control the opening time of the A and B valves, and the following relationship exists: ΔT2=t3-t4 (8) The pulse valve feedback unit in the execution module 4 controls the pulse valve opening time, and the following relationship exists: ΔT3=t5-t6 (9).

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