CN116146900A - A pressure-stabilizing gas path structure and flow regulating method - Google Patents
A pressure-stabilizing gas path structure and flow regulating method Download PDFInfo
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Abstract
本发明公开了一种稳压气路结构及流量调节方法,包括依次连接的排氮单元、分子塔组、储氧单元和流量调节组件;分子塔组包括若干组分子塔,每组分子塔两端均设置有第一控制阀和第一气阻;第一控制阀连接排氮单元,第一气阻连接储氧单元,第一气阻和储氧单元之间还设置有单向阀和第二气阻;流量调节组件包括依次设置的第一压力传感器、第三气阻、第二压力传感器和第三压力传感器。设置第一气阻和第二气阻稳定分子塔组中每个分子塔内的压力,设置单向阀避免储氧单元中的氧气回流进各分子塔造成氧气损失,设置第一压力传感器、第二压力传感器和第三压力传感器相配合对制氧机出氧的压力和流量进行闭环动态控制,防止压力的波动导致气体浓度的改变。
The invention discloses a pressure-stabilizing gas path structure and a flow regulating method, which include sequentially connected nitrogen exhaust units, molecular tower groups, oxygen storage units and flow regulating components; the molecular tower group includes several groups of molecular towers, each group of molecular towers has two Both ends are provided with a first control valve and a first air resistance; the first control valve is connected to the nitrogen exhaust unit, the first air resistance is connected to the oxygen storage unit, and a one-way valve and a second air resistance are also arranged between the first air resistance and the oxygen storage unit. Two air resistances; the flow adjustment assembly includes a first pressure sensor, a third air resistance, a second pressure sensor and a third pressure sensor arranged in sequence. Set the first air resistance and the second air resistance to stabilize the pressure in each molecular tower in the molecular tower group, set a one-way valve to prevent the oxygen in the oxygen storage unit from flowing back into each molecular tower and cause oxygen loss, set the first pressure sensor, the second The second pressure sensor cooperates with the third pressure sensor to perform closed-loop dynamic control of the oxygen output pressure and flow rate of the oxygen generator, preventing pressure fluctuations from causing changes in gas concentration.
Description
技术领域technical field
本发明涉及氧气制造技术领域,具体涉及一种稳压气路结构及流量调节方法。The invention relates to the technical field of oxygen production, in particular to a pressure stabilizing gas circuit structure and a flow regulating method.
背景技术Background technique
PSA制氧机的制氧浓度和出氧流量是制氧机性能的重要参数,为提升制氧机的制氧量,通常会设置多个分子筛塔进行压缩空气的氮氧分离,产生氧气,然后把多个分子筛塔中分离出的氧气收集进储氧仓,在储氧仓后端设置减压阀,再输出一定压力的氧气,氮气则通过排氮消音器消音后排出。The oxygen concentration and oxygen flow rate of the PSA oxygen generator are important parameters for the performance of the oxygen generator. In order to increase the oxygen production capacity of the oxygen generator, multiple molecular sieve towers are usually set up to separate the nitrogen and oxygen from the compressed air to generate oxygen, and then The oxygen separated from multiple molecular sieve towers is collected into the oxygen storage tank, and a pressure reducing valve is set at the rear end of the oxygen storage tank, and then a certain pressure of oxygen is output, and the nitrogen is discharged through the nitrogen exhaust silencer.
分子筛通过吸附氮的物理特性分离压缩空气中的氧气和氮气,但分子筛的吸附性能受气体压力的影响,且各分子筛塔在接入压缩空气、排氮或排氧时压力会发生变化,分子筛塔中的压力过小,会影响分子筛的吸附性能,分子筛塔中的压力过大,会影响压缩空气进入分子筛塔,从而增大空气压缩机的负荷;且分离的氧气从分子筛塔流入储氧仓的过程中,会因为分子筛塔的压力变化出现一些损失。储氧仓后端的管道中气体的压力与流量在理想状态下呈正比例关系,压力越大,流量也越大,市面上的精密、非精密的机械弹簧式减压阀普遍存在压力波动问题,压力的波动会带来流量的增大或减小,从而引起气体浓度的变化。Molecular sieves separate oxygen and nitrogen in compressed air through the physical properties of nitrogen adsorption, but the adsorption performance of molecular sieves is affected by gas pressure, and the pressure of each molecular sieve tower will change when it is connected to compressed air, nitrogen or oxygen exhaust, molecular sieve towers If the pressure in the molecular sieve is too small, it will affect the adsorption performance of the molecular sieve. If the pressure in the molecular sieve tower is too high, it will affect the compressed air entering the molecular sieve tower, thereby increasing the load of the air compressor; and the separated oxygen flows from the molecular sieve tower into the oxygen storage tank. During the process, there will be some loss due to the pressure change of the molecular sieve tower. Ideally, the pressure and flow of the gas in the pipeline at the back end of the oxygen storage tank are in direct proportion. The fluctuation of the flow rate will increase or decrease, which will cause the change of gas concentration.
因此如何维持各分子筛塔在制氧过程中的压力、减少压力波动带来的出氧流量增大或减小而引起氧气浓度降低的情况成为了本领域技术人员亟待解决的问题。Therefore, how to maintain the pressure of each molecular sieve tower during the oxygen production process, and reduce the increase or decrease of the oxygen flow rate caused by the pressure fluctuation, which causes the decrease of the oxygen concentration, has become an urgent problem to be solved by those skilled in the art.
发明内容Contents of the invention
本发明所要解决的技术问题是分子塔在接入压缩空气、排氮或排氧时压力会发生变化,压力的波动会带来流量的增大或减小,从而引起气体浓度的变化,目的在于提供一种稳压气路结构及流量调节方法,通过设置多组分子塔,每组分子塔两端均设置有第一控制阀和第一气阻,第一气阻和储氧单元之间设置有单向阀和第二气阻,通过第一气阻和第二气阻稳定分子塔组中每个分子塔内的压力,设置单向阀避免储氧单元中的氧气回流进各分子塔造成氧气损失,设置流量调节组件对制氧机出氧的压力和流量进行闭环动态控制,防止压力的波动带来的气体浓度的改变。The technical problem to be solved by the present invention is that the pressure of the molecular tower will change when it is connected to compressed air, nitrogen or oxygen, and the fluctuation of pressure will cause the increase or decrease of the flow rate, thereby causing the change of the gas concentration. The purpose is to Provide a pressure-stabilizing gas circuit structure and a flow adjustment method. By setting up multiple groups of molecular towers, each group of molecular towers is provided with a first control valve and a first air resistance at both ends, and an air resistance is installed between the first air resistance and the oxygen storage unit. There is a one-way valve and a second air resistance, the pressure in each molecular tower in the molecular tower group is stabilized through the first air resistance and the second air resistance, and the one-way valve is set to prevent the oxygen in the oxygen storage unit from flowing back into each molecular tower to cause Oxygen loss, the flow adjustment component is set to perform closed-loop dynamic control on the pressure and flow of oxygen output from the oxygen generator to prevent changes in gas concentration caused by pressure fluctuations.
本发明通过下述技术方案实现:The present invention realizes through following technical scheme:
本发明第一方面提供一种稳压气路结构,包括依次连接的排氮单元、分子塔组、储氧单元和流量调节组件;The first aspect of the present invention provides a pressure-stabilizing gas path structure, including a nitrogen exhaust unit, a molecular tower group, an oxygen storage unit, and a flow adjustment component connected in sequence;
所述分子塔组包括若干组分子塔,每组所述分子塔两端均设置有第一控制阀和第一气阻;The group of molecular towers includes several groups of molecular towers, and the two ends of each group of molecular towers are provided with a first control valve and a first air resistance;
所述第一控制阀连接排氮单元,所述第一气阻连接储氧单元,所述第一气阻和储氧单元之间还设置有单向阀和第二气阻;The first control valve is connected to the nitrogen exhaust unit, the first air resistance is connected to the oxygen storage unit, and a one-way valve and a second air resistance are also arranged between the first air resistance and the oxygen storage unit;
所述流量调节组件包括依次设置的第一压力传感器、第三气阻、第二压力传感器和第三压力传感器。The flow regulating assembly includes a first pressure sensor, a third air resistance, a second pressure sensor and a third pressure sensor arranged in sequence.
本发明通过设置多组分子塔,每组分子塔两端均设置有第一控制阀和第一气阻,设置第一控制阀控制排氮速度,保证排氮时的气压稳定,保证分子塔内的气压稳定性,第一气阻和储氧单元之间设置有单向阀和第二气阻,通过第一气阻和第二气阻稳定分子塔组中每个分子塔内的压力,设置单向阀避免储氧单元中的氧气回流进各分子塔造成氧气损失,设置第一压力传感器、第三气阻、第二压力传感器和第三压力传感器相互配合对制氧机出氧的压力和流量进行闭环动态控制,防止压力的波动带来的气体浓度的改变。The present invention arranges multiple sets of molecular towers, each set of molecular towers is provided with a first control valve and a first air resistance at both ends, and the first control valve is set to control the speed of nitrogen discharge, so as to ensure the stability of the air pressure during nitrogen discharge and ensure the air pressure stability, a one-way valve and a second air resistance are arranged between the first air resistance and the oxygen storage unit, and the pressure in each molecular tower in the molecular tower group is stabilized by the first air resistance and the second air resistance. The one-way valve prevents the oxygen in the oxygen storage unit from flowing back into the molecular towers to cause oxygen loss. The first pressure sensor, the third air resistance, the second pressure sensor and the third pressure sensor are set to cooperate with each other to determine the pressure and pressure of the oxygen output from the oxygen generator. The flow rate is closed-loop dynamic control to prevent changes in gas concentration caused by pressure fluctuations.
进一步的,所述第二气阻的孔径大于第一气阻的孔径。Further, the aperture diameter of the second air resistance is larger than the aperture diameter of the first air resistance.
进一步的,所述储氧单元具体包括:依次设置的第一储氧仓、第二控制阀和第二储氧仓。Further, the oxygen storage unit specifically includes: a first oxygen storage chamber, a second control valve, and a second oxygen storage chamber arranged in sequence.
进一步的,所述第一压力传感器用于监测储氧单元的出气压力,所述第二压力传感器用于监测第三气阻稳流后的气体压力,所述第三压力传感器用于检测环境大气压力。Further, the first pressure sensor is used to monitor the gas outlet pressure of the oxygen storage unit, the second pressure sensor is used to monitor the gas pressure after the third gas resistance stabilized flow, and the third pressure sensor is used to detect the ambient air pressure.
进一步的,所述分子塔还设置有第四压力传感器。Further, the molecular tower is also provided with a fourth pressure sensor.
进一步的,每个所述分子塔内部均填充有分子筛。Further, each molecular tower is filled with molecular sieves.
本发明第二方面提供一种利用权利要求1至6任一项所述的一种稳压气路结构的流量调节方法,包括以下具体步骤:The second aspect of the present invention provides a method for regulating the flow rate of a pressure-stabilizing gas path structure according to any one of claims 1 to 6, comprising the following specific steps:
S1、实时获取目标出气压力值P0、第二压力传感器的监测数据P2和第三压力传感器的监测数据P3;S1. Real-time acquisition of the target outlet pressure value P0, the monitoring data P2 of the second pressure sensor and the monitoring data P3 of the third pressure sensor;
S2、获取P2和P3之间的压差值P23,判断压差值P23与P0的大小,根据判断结果调节第二控制阀的控制电压VF,获得调节后的P2′;S2. Obtain the pressure difference value P 23 between P2 and P3, judge the size of the pressure difference value P 23 and P0, adjust the control voltage VF of the second control valve according to the judgment result, and obtain the adjusted P2′;
S3、获取P2′和P3之间的压差值P2ˊ3,判断压差值P2ˊ3与P0的大小,直至压差值P2ˊ3与P0的差值在目标范围内,否则执行步骤S2。S3. Obtain the differential pressure value P 2′3 between P2′ and P3, judge the magnitude of the differential pressure value P 2′′3 and P0, until the difference between the differential pressure value P 2′3 and P0 is within the target range, otherwise execute step S2.
通过流量调节组件配合流量调节方法实现对制氧机出氧的压力和流量的闭环动态控制。The closed-loop dynamic control of the pressure and flow of oxygen output from the oxygen generator is realized through the flow adjustment component and the flow adjustment method.
进一步的,所述根据判断结果调节第二控制阀的控制电压具体包括:Further, the adjusting the control voltage of the second control valve according to the judgment result specifically includes:
所述压差值P23与P0的大小关系包括大于、小于和等于;The size relationship between the pressure difference value P23 and P0 includes greater than, less than and equal to;
判断所述压差值P23与P0的大小关系,根据大小关系调整控制电压VF的变化趋势,输出控制电压VF的变化趋势:Determine the magnitude relationship between the pressure difference value P23 and P0, adjust the variation trend of the control voltage VF according to the magnitude relationship, and output the variation trend of the control voltage VF:
压差值P23与P0的大小关系为大于时,输出的控制电压VF的变化趋势为下降;When the relationship between the pressure difference value P23 and P0 is greater than that, the change trend of the output control voltage VF is downward;
压差值P23与P0的大小关系为小于时,输出的控制电压VF的变化趋势为上升;When the relationship between the pressure difference value P23 and P0 is less than, the change trend of the output control voltage VF is rising;
压差值P23与P0的大小关系为等于时,输出的控制电压VF的变化趋势为保持。When the magnitude relationship between the pressure difference value P23 and P0 is equal, the variation trend of the output control voltage VF is maintained.
进一步的,还包括获取第三压力传感器的监测数据P3和第四压力传感器的监测数据P4,根据P3和P4的压差值调整分子塔的压强。Further, it also includes acquiring the monitoring data P3 of the third pressure sensor and the monitoring data P4 of the fourth pressure sensor, and adjusting the pressure of the molecular tower according to the pressure difference between P3 and P4.
进一步的,还包括获取第一压力传感器的监测数据P1和第二压力传感器的监测数据P2;Further, it also includes acquiring the monitoring data P1 of the first pressure sensor and the monitoring data P2 of the second pressure sensor;
根据P1和P2之间的压差值作为第三气阻稳压的参考值,对第三气阻进行调节。The third air resistance is adjusted according to the pressure difference between P1 and P2 as a reference value for the third air resistance to stabilize the pressure.
本发明与现有技术相比,具有如下的优点和有益效果:Compared with the prior art, the present invention has the following advantages and beneficial effects:
1.通过设置多组分子塔,每组分子塔两端均设置有第一控制阀和第一气阻,第一气阻和储氧单元之间设置有单向阀和第二气阻,通过第一气阻和第二气阻稳定分子塔组中每个分子塔内的压力,设置单向阀避免储氧单元中的氧气回流进各分子塔造成氧气损失,设置流量调节组件对制氧机出氧的压力和流量进行闭环动态控制,防止压力的波动带来的气体浓度的改变;1. By setting up multiple groups of molecular towers, each group of molecular towers is provided with a first control valve and a first air block at both ends, and a one-way valve and a second air block are provided between the first air block and the oxygen storage unit. The first air resistance and the second air resistance stabilize the pressure in each molecular tower in the molecular tower group, set a one-way valve to prevent the oxygen in the oxygen storage unit from flowing back into each molecular tower to cause oxygen loss, and set the flow adjustment component to adjust the oxygen generator. The pressure and flow of oxygen output are closed-loop dynamic control to prevent changes in gas concentration caused by pressure fluctuations;
2.能够配合机械结构实现对储氧仓的出氧压力的动态控制,使制氧机的出氧量始终维持在稳定状态,彻底解决市面上精密、非精密的机械弹簧式减压阀普遍存在的压力波动带来的出氧流量增大或减小而带来的氧气浓度降低的问题;2. It can cooperate with the mechanical structure to realize the dynamic control of the oxygen output pressure of the oxygen storage tank, so that the oxygen output of the oxygen generator can always be maintained in a stable state, completely solving the common problem of precision and non-precision mechanical spring pressure reducing valves on the market The problem of oxygen concentration reduction caused by the increase or decrease of the oxygen flow rate caused by the pressure fluctuation;
3.能够解决用户管路过长带来的阻力对气体流量的影响,即如果阻力达到一定程度会提醒用户管路堵塞,帮助查找和解决问题。3. It can solve the impact of the resistance caused by the user's pipeline being too long on the gas flow, that is, if the resistance reaches a certain level, it will remind the user that the pipeline is blocked, and help find and solve the problem.
附图说明Description of drawings
为了更清楚地说明本发明示例性实施方式的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本发明的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。在附图中:In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work. In the attached picture:
图1为本发明实施例中的稳压气路结构示意图一;Fig. 1 is a schematic diagram of the structure of the pressure stabilizing gas circuit in the embodiment of the present invention;
图2为本发明实施例中的稳压气路结构示意图二。Fig. 2 is the second schematic diagram of the structure of the pressure stabilizing gas circuit in the embodiment of the present invention.
附图中标记及对应的零部件名称:Marks and corresponding parts names in the attached drawings:
10、分子塔组;11、分子塔;12、第一控制阀;13、第一气阻;14、单向阀;15、第二气阻;20、排氮单元;21、排氮仓;30、储氧单元;31、第一储氧仓;32、第二控制阀;33、第二储氧仓;40、流量调节组件;41、第一压力传感器;42、第三气阻;43、第二压力传感器;44、第三压力传感器;45、第四压力传感器;46、第三控制阀。10. Molecular tower group; 11. Molecular tower; 12. First control valve; 13. First air resistance; 14. One-way valve; 15. Second air resistance; 20. Nitrogen exhaust unit; 21. Nitrogen exhaust chamber; 30. Oxygen storage unit; 31. First oxygen storage chamber; 32. Second control valve; 33. Second oxygen storage chamber; 40. Flow adjustment component; 41. First pressure sensor; 42. Third air resistance; 43 , the second pressure sensor; 44, the third pressure sensor; 45, the fourth pressure sensor; 46, the third control valve.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白,下面结合实施例和附图,对本发明作进一步的详细说明,本发明的示意性实施方式及其说明仅用于解释本发明,并不作为对本发明的限定。In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.
实施例1Example 1
如图1和图2所示,本实施例提供一种稳压气路结构,包括依次连接的排氮单元20、分子塔组10、储氧单元30和流量调节组件40;As shown in Figures 1 and 2, this embodiment provides a stabilized gas circuit structure, including a
分子塔组10包括若干组分子塔11,每组分子塔11两端均设置有第一控制阀12和第一气阻13;
第一控制阀12连接排氮单元20,第一气阻13连接储氧单元30,第一气阻13和储氧单元30之间还设置有单向阀14和第二气阻15;The
流量调节组件40包括依次设置的第一压力传感器41、第三气阻42、第二压力传感器43和第三压力传感器44。The
本发明通过设置多组分子塔11,每组分子塔11两端均设置有第一控制阀12和第一气阻13,设置第一控制阀12控制排氮速度,保证排氮时的气压稳定,保证分子塔11内的气压稳定性,第一气阻13和储氧单元30之间设置有单向阀14和第二气阻15,通过第一气阻13和第二气阻15稳定分子塔组10中每个分子塔11内的压力,设置单向阀14避免储氧单元30中的氧气回流进各分子塔11造成氧气损失,设置第一压力传感器41、第三气阻42、第二压力传感器43和第三压力传感器44相互配合对制氧机出氧的压力和流量进行闭环动态控制,防止压力的波动带来的气体浓度的改变。In the present invention, a plurality of groups of
在一些可能的实施例中,排氮单元20包含排氮仓21以及各分子塔11至排氮仓21通路上的第一控制阀12,能够周期性的对每个分子塔11进行排氮,保证每个分子塔11中的基础压力是高于当前环境大气压的。In some possible embodiments, the
在一些可能的实施例中,第二气阻15的孔径大于第一气阻13的孔径。第二气阻15的孔径大于第一气阻13的孔径能避免阻塞氧气排进储氧单元30的过程,提升集齐各分子塔11氧气的效率。同时,第一气阻13的孔径设置既能让分子塔11中分离出的氧气顺利排出,又能避免分子塔11中的氧气排出过快使分子塔11内压力减小过快影响分子筛的吸附性能,且各分子塔11对应的支路也相互连通,这有利于在其中一个分子塔11排出氮气之后制氧之前的时间段里设置一个各分子塔11均压的过程,避免分子塔11中的压力过小延长充入压缩空气的时间,提升制氧效率。In some possible embodiments, the aperture diameter of the
在一些可能的实施例中,储氧单元30具体包括:依次设置的第一储氧仓31、第二控制阀32和第二储氧仓33。第一储氧仓31作为一级储氧仓与第二气阻15所在的干路连通,第二控制阀32的开度可以控制调节,第一储氧仓31中的氧气通过第二控制阀32流进第二储氧仓33,对氧气压力有一个缓存效果可初步减小出氧压力的波动。In some possible embodiments, the
在一些可能的实施例中,第一压力传感器41用于监测储氧单元30的出气压力,第二压力传感器43用于监测第三气阻42稳流后的气体压力,第三压力传感器44用于检测环境大气压力。第一压力传感器41与第二压力传感器43的压差值可作为第三气阻42稳压的参考值,第二压力传感器43与第三压力传感器44的压力差可表征最终出气压力和流量。In some possible embodiments, the
在一些可能的实施例中,分子塔11还设置有第四压力传感器45,分子塔组10中的其中一个分子塔11连接有第四压力传感器45,用于监测分子塔11中的压力大小,确保分子塔11中分子筛的加压吸附性能,第四压力传感器45与分子塔11连接的另一端连接有第三控制阀46,第三控制阀46与第一控制阀12相同。In some possible embodiments, the
在一些可能的实施例中,每个分子塔11内部均填充有分子筛,分子塔11还连接有空气压缩机组,空气压缩机组包含空压机,用于为分子塔组10提供压缩空气。In some possible embodiments, each
实施例2Example 2
本实施例基于实施例1的基础提供基于稳压气路结构的流量调节方法,包括以下具体步骤:Based on the basis of Embodiment 1, this embodiment provides a flow regulation method based on the pressure-stabilizing gas circuit structure, including the following specific steps:
S1、实时获取目标出气压力值P0、第二压力传感器43的监测数据P2和第三压力传感器44的监测数据P3;S1. Obtain the target outlet pressure value P0, the monitoring data P2 of the
S2、获取P2和P3之间的压差值P23,判断压差值P23与P0的大小,根据判断结果调节第二控制阀32的控制电压VF,获得调节后的P2′;S2. Obtain the pressure difference value P23 between P2 and P3, judge the magnitude of the pressure difference value P23 and P0, adjust the control voltage VF of the
S3、获取P2′和P3之间的压差值P2ˊ3,判断压差值P2ˊ3与P0的大小,直至压差值P2ˊ3与P0的差值在目标范围内,否则执行步骤S2。S3. Obtain the differential pressure value P 2′3 between P2′ and P3, judge the magnitude of the differential pressure value P 2′′3 and P0, until the difference between the differential pressure value P 2′3 and P0 is within the target range, otherwise execute step S2.
通过流量调节组件40配合流量调节方法实现对制氧机出氧的压力和流量的闭环动态控制。The closed-loop dynamic control of the pressure and flow of the oxygen output from the oxygen generator is realized by the
在一些可能的实施例中,根据判断结果调节第二控制阀32的控制电压具体包括:In some possible embodiments, adjusting the control voltage of the
压差值P23与P0的大小关系包括大于、小于和等于;The relationship between the differential pressure value P23 and P0 includes greater than, less than and equal to;
判断压差值P23与P0的大小关系,根据大小关系调整控制电压VF的变化趋势;Judging the magnitude relationship between the pressure difference value P23 and P0, and adjusting the change trend of the control voltage VF according to the magnitude relationship;
输出控制电压VF的变化趋势。The variation trend of the output control voltage VF.
压差值P23与P0的大小关系为大于时,输出的控制电压VF的变化趋势为下降;When the relationship between the pressure difference value P23 and P0 is greater than that, the change trend of the output control voltage VF is downward;
压差值P23与P0的大小关系为小于时,输出的控制电压VF的变化趋势为上升;When the relationship between the pressure difference value P23 and P0 is less than, the change trend of the output control voltage VF is rising;
压差值P23与P0的大小关系为等于时,输出的控制电压VF的变化趋势为保持。When the magnitude relationship between the pressure difference value P23 and P0 is equal, the variation trend of the output control voltage VF is maintained.
在一些可能的实施例中,还包括获取第三压力传感器44的监测数据P3和第四压力传感器45的监测数据P4,根据P3和P4的压差值调整分子塔11的压强。In some possible embodiments, it also includes acquiring monitoring data P3 of the
获取第一压力传感器41的监测数据P1和第二压力传感器43的监测数据P2;根据P1和P2之间的压差值作为第三气阻42稳压的参考值,对第三气阻42进行调节。Obtain the monitoring data P1 of the
在调节分子塔11的压强时,会对第一压力传感器41和第二压力传感器43的监测数据产生影响,因此获取的监测数据均为实时状态下的数据。When the pressure of the
实施例3Example 3
稳压电磁阀为高速电磁阀或比例电磁阀,如选择比例电磁阀,其开度是通过电压来进行控制,控制方法如下:The stabilized solenoid valve is a high-speed solenoid valve or a proportional solenoid valve. If a proportional solenoid valve is selected, its opening is controlled by voltage. The control method is as follows:
假设比例电磁阀开度范围为Vc~Vo,其中Vc为比例电磁阀开度为0(即关闭状态)的控制电压值,Vo为比例电磁阀开度为100(即完全打开状态)的控制电压值,设置对比例电磁阀的控制参数为VF,则VF的动态控制范围为Vc~Vo。若制氧机出氧压力的控制压差值P23设置为50kPa,实际检测并计算出的压差值P23为60kPa,此时判断出当前的出氧压力比控制目标值大,就会调整减小比例电磁阀开度的控制参数VF的值,从而减小压差值P23,反之若判断出当前的出氧压力比控制目标值小,就会增大比例电磁阀开度的控制参数VF的值,最终使压差值P23的值稳定在控制目标值,实现制氧机出氧压力的动态稳定控制。Assume that the proportional solenoid valve opening range is Vc~Vo, where Vc is the control voltage value when the proportional solenoid valve opening is 0 (that is, the closed state), and Vo is the control voltage when the proportional solenoid valve opening is 100 (that is, the fully open state) value, set the control parameter of the comparative solenoid valve to VF, then the dynamic control range of VF is Vc~Vo. If the control differential pressure value P23 of the oxygen output pressure of the oxygen generator is set to 50kPa, and the actual detected and calculated differential pressure value P23 is 60kPa, at this time, it is judged that the current oxygen output pressure is greater than the control target value, and it will be adjusted to decrease The value of the control parameter VF of the proportional solenoid valve opening, thereby reducing the pressure difference value P23, on the contrary, if it is judged that the current oxygen outlet pressure is lower than the control target value, the value of the control parameter VF of the proportional solenoid valve opening will be increased , and finally stabilize the value of the pressure difference P23 at the control target value, realizing the dynamic and stable control of the oxygen outlet pressure of the oxygen generator.
在对压差值P23进行判断时,若判断结果为该压差值偏离正常值的范围,可初步判定并提醒用户管道堵塞。When judging the differential pressure value P23, if the judging result is that the differential pressure value deviates from the range of the normal value, it can preliminarily judge and remind the user that the pipeline is blocked.
以上所述的具体实施方式,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施方式而已,并不用于限定本发明的保护范围,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.
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