CN114779865B - Control method of low-oxygen gas-conditioning system and low-oxygen gas-conditioning system - Google Patents
Control method of low-oxygen gas-conditioning system and low-oxygen gas-conditioning system Download PDFInfo
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Abstract
The invention relates to the technical field of air conditioning, in particular to a control method of a low-oxygen controlled atmosphere system and the low-oxygen controlled atmosphere system, wherein the control method of the low-oxygen controlled atmosphere system comprises the following steps: acquiring a current value of oxygen content in the enclosure space; determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one oxygen content gradient value; controlling a nitrogen production device to operate so as to provide nitrogen corresponding to the nitrogen purity; controlling the on-off of an electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate corresponding to the nitrogen flow rate; and repeating the steps until the current value of the oxygen content in the enclosure space reaches the target value. According to the invention, the purity and the flow of the introduced nitrogen are adjusted according to the relation between the oxygen content in the enclosure space and the set oxygen content gradient value, so that the consumption of the nitrogen is reduced, the consumption of an oxygen generator is reduced, and the speed of oxygen exhaust is increased while the oxygen in the enclosure space is exhausted.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a control method of a low-oxygen controlled atmosphere system and the low-oxygen controlled atmosphere system.
Background
The hypoxia air-conditioning control technology under the high-airtight environment is short for hypoxia air-conditioning technology, and the hypoxia air-conditioning technology is characterized in that clean nitrogen with effective concentration is filled into a storage space with good air tightness, and oxygen in the storage space is replaced, so that the entomophthora is in a serious anoxic state, the living environment of the entomophthora is damaged, and the entomophthora is suffocated, and the purpose of protecting stored articles is achieved. Because the storage of cultural relics has higher requirements on the storage environment, the low-oxygen controlled atmosphere technology becomes an important means for maintaining the safety of cultural heritage.
The low-oxygen gas regulation technology comprises a maintenance structure sealing technology, a gas cleaning technology, an oxygen content regulation technology, a temperature and humidity regulation technology, an intelligent control technology and an informatization technology. The low-oxygen air conditioning technology has no pollution, no residue, safety and environmental protection, and is the leading-edge technology of the modern storage technology.
However, the low-oxygen controlled atmosphere technology has problems of low efficiency, long replacement time and large nitrogen consumption when implementing oxidative replacement, and needs to be improved.
Disclosure of Invention
In view of the above, it is desirable to provide a method for controlling an hypoxic atmosphere control system and a hypoxic atmosphere control system.
The invention is realized in such a way that the control method of the hypoxia controlled atmosphere system comprises the following steps:
acquiring a current value of oxygen content in the enclosure space;
determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one oxygen content gradient value;
controlling a nitrogen production device to operate so as to provide nitrogen corresponding to the nitrogen purity;
controlling the on-off of an electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate corresponding to the nitrogen flow rate;
repeating the steps until the current value of the oxygen content in the enclosure space reaches the target value
In one embodiment, the present invention also provides a hypoxic modified atmosphere system, comprising:
the nitrogen making device is used for sucking air and purifying to obtain nitrogen with required purity;
the inlet end of the humidifying device is connected with the nitrogen making device through a plurality of pipelines, and the outlet end of the humidifying device is connected with the enclosure space and used for adjusting the humidity of nitrogen introduced into the enclosure space; and
and the control system is electrically connected with the nitrogen generation device and the humidity conditioning device respectively and is used for executing the control method of the hypoxia air conditioning system according to the embodiment of the invention.
The control method of the low-oxygen controlled atmosphere system provided by the invention adjusts the purity and the flow of the introduced nitrogen according to the relation between the oxygen content in the enclosure space and the set oxygen content gradient value, reduces the consumption of the nitrogen, reduces the consumption of an oxygen generator, saves the energy consumption and improves the speed of exhausting the oxygen in the enclosure space while exhausting the oxygen in the enclosure space.
Drawings
Fig. 1 is a flowchart of a control method of a hypoxic gas conditioning system according to an embodiment;
fig. 2 is a block diagram of a hypoxic gas conditioning system according to an embodiment;
FIG. 3 is a block diagram showing an internal configuration of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of the present application.
As shown in fig. 1, in an embodiment, a method for controlling a modified atmosphere system is provided, which may specifically include the following steps:
and step S110, acquiring the current value of the oxygen content in the enclosure space.
And S120, determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one oxygen content gradient value.
And step S130, controlling the nitrogen making device to operate so as to provide nitrogen corresponding to the nitrogen purity.
And S140, controlling the on-off of the electromagnetic valve to convey the nitrogen obtained in the previous step into the enclosure at a flow rate corresponding to the nitrogen flow rate.
And repeating the steps S110 to S140 until the current value of the oxygen content in the enclosure reaches the target value.
In this embodiment, the enclosure space may be various storage spaces, such as storage spaces for articles such as cultural relics, precious metals, books, and the like, and the method of the present invention may be applied as long as a relatively closed space is formed and the oxygen content in the space is required to be not higher than a certain value. In addition, it is to be understood that the invention provides requirements for the oxygen content in the enclosed space, the oxygen content in the enclosed space is reduced by introducing nitrogen, according to the requirements of different articles in the enclosure space, the oxygen and nitrogen in the invention can be replaced by other gases, for example, the oxygen content is required to be higher, the oxygen is required to be introduced into the enclosure space to remove the nitrogen in the enclosure space, and the like, and the method of the invention can be applied. The current value of the oxygen content in the enclosure space is obtained by detecting the oxygen content value in the enclosure space at the current moment.
In this embodiment, the current value of the oxygen content in the enclosure is acquired by an oxygen content sensor or an oxygen concentration sensor arranged in the enclosure. The current value of the oxygen content in the enclosure refers to the value (concentration) of the oxidation content in the enclosure at the moment of collection.
In this embodiment, the oxygen content gradient values are arranged from small to large or from large to small, and the size relationship between the current value of the oxygen content in the enclosure and at least one oxygen content gradient value means that the current value of the oxygen content in the enclosure is located between which two oxygen content gradient values, before which oxygen content gradient value or after which oxygen content gradient value, that is, the belonging oxygen content gradient. And determining the corresponding nitrogen purity and the nitrogen flow according to the oxygen content gradient to which the current value of the oxygen content in the enclosure belongs. The oxygen content gradient value has a preset corresponding relation with the nitrogen purity and the flow. Specifically, in the invention, along with the reduction of the oxygen content in the enclosure space, the purity of the introduced nitrogen is improved, the flow is reduced, the purity is improved, but the flow is reduced, the power of the nitrogen making device is not obviously changed by the changing mode, and meanwhile, the mode utilizes the principle that when the oxygen content of the enclosure space is higher, the oxygen discharging efficiency is mainly influenced by the flow of the introduced gas, and when the oxygen content of the enclosure space is lower, the oxygen discharging efficiency is mainly influenced by the purity of the introduced gas, the consumption of nitrogen is reduced, and the oxygen discharging speed can be improved.
In this embodiment, the nitrogen purity and the nitrogen flow rate are determined, and the nitrogen gas of the corresponding purity and flow rate can be supplied by controlling the operation of the nitrogen generator and controlling the opening degree of the valve.
In this embodiment, the oxygen content in the enclosure is detected in real time while the nitrogen is introduced into the enclosure, and the purity and flow rate of the nitrogen can be adjusted in real time according to the change of the oxygen content in the enclosure by repeatedly executing all the steps of this embodiment.
In this embodiment, it should be noted that the oxygen content (concentration) in the enclosure refers to the percentage (mass ratio or mass ratio) of oxygen to the total gas in the enclosure, and the nitrogen is extracted from the air, so the nitrogen content in the obtained gas is described by purity, which is a general description. The different ways of describing do not affect the essence of the invention.
The control method of the low-oxygen gas-regulating system provided by the invention adjusts the purity and the flow of the introduced nitrogen according to the relation between the oxygen content in the enclosure space and the set oxygen content gradient value, reduces the consumption of the nitrogen while exhausting the oxygen in the enclosure space, reduces the consumption of an oxygen generation device, saves the energy consumption and improves the speed of exhausting the oxygen in the enclosure space.
As an alternative embodiment of the present invention, the at least one gradient value of oxygen content has n values, which are VOL1, VOL2, …, and VOL ln;
wherein VOLn is greater than VOLm, and VOLm is the target value of the oxygen content in the enclosure space.
In the present embodiment, taking 2 oxygen content gradient values as an example, the oxygen content gradient values include VOL1 and VOL2, and VOL1> VOL2> VOL 3; wherein VOL3 is the target value of oxygen content in the enclosure.
As an optional embodiment of the present invention, the determining, according to the obtained magnitude relationship between the current value of the oxygen content in the enclosure and the at least one gradient value of the oxygen content, the corresponding nitrogen purity and nitrogen flow rate includes:
determining an oxygen content gradient value VOLi with the minimum absolute value of the difference value VOL with the current value VOL of the oxygen content in the enclosure space and less than or equal to VOL, wherein i is a positive integer and is more than or equal to 1 and less than or equal to n;
the control nitrogen making device operates to provide nitrogen corresponding to the nitrogen purity, and comprises:
controlling the nitrogen generator to operate to provide nitrogen with a nitrogen purity of 1-VOLi or greater.
In this embodiment, the purity of the nitrogen gas is directly different from the gradient values of the oxygen content, and the purity of the nitrogen gas corresponding to each gradient of the oxygen content can be determined by the above formula.
As an optional embodiment of the invention, the controlling the on-off of the electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate of a corresponding size comprises the following steps:
judging whether the current value VOL of the oxygen content in the enclosure space is larger than VOL1, if so, conveying nitrogen flow into the enclosure space by using flow Q1;
judging whether the current value VOL of the oxygen content in the enclosure space is smaller than VOLn and larger than VOLm or not, if so, conveying nitrogen flow into the enclosure space at a flow rate Q2;
and judging whether the VOL at the current value of the oxygen content in the enclosure space is less than or equal to VOL1 and more than or equal to VOLn, if so, conveying nitrogen flow into the enclosure space at a flow rate Q, wherein Q is more than or equal to Q1 and more than or equal to Q2, and Q is only reduced and not increased along with the increase of the purity of the nitrogen.
In this embodiment, it is understood that Q1 is the maximum flow rate that the nitrogen generator can provide, and Q2 is the minimum flow rate that the nitrogen generator can provide, and as the nitrogen gas is introduced, the current value VOL of the oxygen content in the enclosure decreases, and the flow rate of the nitrogen gas introduced into the enclosure changes from Q1 to Q2, and only decreases, but does not increase, and may be maintained at a certain value.
As an optional embodiment of the invention, the nitrogen making device is provided with K pipelines leading to the enclosure space, each pipeline is provided with a throttle valve, the throttle valves are arranged according to the maximum flow rate of each pipeline from large to small, the throttle valves arranged on each pipeline are marked as L1, L2, … and LK, and the gear of the throttle valve Li is marked as Li from large to small 1 ，Li 2 ，…，Li ji Wherein i is a positive integer, i is more than or equal to 1 and less than or equal to K, and ji is the gear number of the ith throttle valve;
the flow Q1 corresponds to the flow when the throttle valves L1, L2, … and LK are all opened at the maximum gear; the flow rate Q2 corresponds to the flow rate of the minimum gear when the throttle valve LK is opened;
every time the nitrogen purity is improved by one grade, the change quantity of the throttle valve group gear consisting of K throttle valves is
［
］。
In the present embodiment, it is to be understood that, after the shift amount of the gear is equal to each throttle shift amount here, for example, L1 is shifted from 5 to 3, and L2 is shifted from 4 to 3, the total shift amount is (5-3) + (4-3) = 3. Wherein, the [ alpha ], [ beta ] -a
Is as
Rounding of the results, i.e.:
when in use
In the case of an integer, the number of the carbon atoms,
=［
］；
when in use
When the number is not an integer,
+1=［
］。
in this embodiment, the nitrogen purity is raised by one level, and the number of stages to be changed among K throttle valves is [ [ solution ] ]
The gear to be changed is preferably the gear which contributes most to the flow in all the currently opened gears, and when the specifications of all the pipelines and the throttle valves are the same, the problem of selecting which pipeline valve to adjust does not exist; when the pipeline specifications are different and the valve specifications are the same, the gear of the valve on the pipeline with the largest flow is preferentially changed.
As an alternative embodiment of the invention, n values of the gradient values of the oxygen content satisfy:
C 0 （n+1）=
wherein: c 0 Is a positive integer and not less than 1.
In this embodiment, by setting a value of C 0 The automatic division of the oxygen content gradient can be realized; as another alternative implementation, C may be given 0 If (3, 8) specifies that a small value is preferred, C can be automatically determined 0 And in obtaining the enclosureAnd automatically dividing the oxygen content gradient after the current value of the oxygen content and the target value of the oxygen content in the enclosure space. Optionally, the difference between the VOLi and the VOLi +1 and the difference between the VOLn and the VOLm are equal.
As an optional embodiment of the present invention, the nitrogen generating apparatus includes a pair of air exhaust pipes, a valve is disposed on the air exhaust pipe, and the apparatus further includes, before introducing nitrogen into the enclosure for the first time:
obtaining the nitrogen purity of the nitrogen making device;
judging whether the nitrogen purity of the nitrogen production device is greater than 1-VOL1, if so, closing throttle valves L1, L2, … and LK, and opening an exhaust pipeline;
acquiring the purity of nitrogen discharged by an exhaust pipeline;
and judging whether the purity of the nitrogen discharged by the exhaust pipeline is greater than 1-VOL1, if so, opening throttle valves L1, L2, … and LK, and closing the exhaust pipeline.
In this embodiment, it can be understood that if the nitrogen purity of the nitrogen generation device is less than or equal to 1-VOL1, the nitrogen generation is continued until the nitrogen purity meets the requirement; if the purity of the nitrogen discharged by the exhaust pipeline is less than or equal to 1-VOL1, continuously discharging the nitrogen to the air so as to exhaust the air in the pipeline.
As an optional embodiment of the present invention, the method for controlling a modified atmosphere system further comprises:
adjusting the number n of the oxygen content gradient values according to the cycle number to ensure that n satisfies the following conditions:
C t （n+1）=
C t =C 0 -t
wherein: t is the number of times the system has cycled, and t remains unchanged after reaching a set maximum value.
In the present embodiment, it is understood that the process from the detection of the oxygen content in the enclosure being higher than the target value to the execution of the steps of the present invention to reduce the oxygen content in the enclosure to the target value is a cycle.
As an optional embodiment of the present invention, the method for controlling a modified atmosphere system further comprises:
judging whether the current value of the oxygen content in the enclosure space reaches a target value VOLm of the oxygen content in the enclosure space, if so, controlling the nitrogen making device to enter a standby state;
and repeating the previous step at a set time interval.
In the embodiment, the set time period may be a specific time period such as 10 seconds, 1 minute, etc., depending on the airtightness of the enclosure.
As shown in fig. 2, an embodiment of the present invention further provides a hypoxic gas conditioning system, including:
the nitrogen making device is used for sucking air and purifying to obtain nitrogen with required purity;
the inlet end of the humidifying device is connected with the nitrogen making device through a plurality of pipelines, and the outlet end of the humidifying device is connected with the enclosure space and used for adjusting the humidity of nitrogen introduced into the enclosure space; and
and a control system electrically connected to the nitrogen generator and the humidity regulator, respectively, for executing the method of controlling the hypoxic gas conditioning system according to any one of the embodiments of the present invention.
In this embodiment, an oxygen content sensor or an oxygen concentration sensor arranged in the enclosure is connected with the control system, and the control system is also connected with the nitrogen generating device to detect the nitrogen purity of the nitrogen generating device and control the operation of the nitrogen generating device. The nitrogen making device is connected with the rotating protection space through a pipeline, the pipeline is connected to a humidity adjusting device before being connected to the enclosure structure, and the humidity adjusting device is set optionally; optionally, the inlet end of the nitrogen generator is further provided with an air compressor for providing compressed air for the nitrogen generator, and the nitrogen generator purifies the compressed air with nitrogen.
According to the low-oxygen controlled atmosphere system provided by the embodiment of the invention, by operating the control method of the low-oxygen controlled atmosphere system, the purity and the flow of the introduced nitrogen are adjusted according to the relation between the oxygen content in the enclosure space and the set oxygen content gradient value, so that the consumption of the nitrogen is reduced while the oxygen in the enclosure space is exhausted, the consumption of an oxygen generating device is reduced, the energy consumption is saved, and the speed of exhausting the oxygen in the enclosure space is increased.
FIG. 3 is a diagram illustrating an internal structure of a computer device in one embodiment. The computer device may specifically be the control system in fig. 2. As shown in fig. 3, the computer apparatus includes a processor, a memory, a network interface, an input device, and a display screen connected through a system bus. The memory comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system, and may further store a computer program, and when the computer program is executed by the processor, the computer program may enable the processor to implement the control method of the hypoxic gas regulation system provided by the embodiment of the present invention. The internal memory may also store a computer program, and when the computer program is executed by the processor, the computer program may enable the processor to execute the control method of the modified atmosphere oxygen system according to the embodiment of the present invention. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 3 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is proposed, the computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a current value of oxygen content in the enclosure space;
determining corresponding nitrogen purity and nitrogen flow according to the size relation between the obtained current value of the oxygen content in the enclosure space and at least one gradient value of the oxygen content;
controlling a nitrogen production device to operate so as to provide nitrogen corresponding to the nitrogen purity;
controlling the on-off of an electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate corresponding to the nitrogen flow rate;
and repeating the steps until the current value of the oxygen content in the enclosure space reaches the target value.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which, when executed by a processor, causes the processor to perform the steps of:
acquiring a current value of oxygen content in the enclosure space;
determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one oxygen content gradient value;
controlling a nitrogen production device to operate so as to provide nitrogen corresponding to the nitrogen purity;
controlling the on-off of an electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate corresponding to the nitrogen flow rate;
and repeating the steps until the current value of the oxygen content in the enclosure space reaches the target value.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in various embodiments may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (4)
1. A control method of a hypoxic atmosphere control system is characterized by comprising the following steps:
acquiring a current value of oxygen content in the enclosure space;
determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one oxygen content gradient value;
controlling a nitrogen production device to operate so as to provide nitrogen corresponding to the nitrogen purity;
controlling the on-off of an electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate corresponding to the nitrogen flow rate;
repeating the steps until the current value of the oxygen content in the enclosure space reaches a target value;
the at least one oxygen content gradient value is n, and the at least one oxygen content gradient value is VOL1, VOL2, VOLn … and VOLn from large to small;
wherein VOLn is greater than VOLm, and VOLm is the target value of the oxygen content in the enclosure space;
determining corresponding nitrogen purity and nitrogen flow according to the obtained size relationship between the current value of the oxygen content in the enclosure space and at least one gradient value of the oxygen content, and the method comprises the following steps:
determining an oxygen content gradient value VOLi with the minimum absolute value of the difference value VOL with the current value VOL of the oxygen content in the enclosure space and less than or equal to VOL, wherein i is a positive integer and is more than or equal to 1 and less than or equal to n;
the control nitrogen making device operates to provide nitrogen corresponding to the nitrogen purity, and comprises:
controlling the nitrogen making device to operate so as to provide nitrogen with the nitrogen purity of more than or equal to 1-VOLi;
the method for controlling the on-off of the electromagnetic valve to convey the nitrogen obtained in the last step into the enclosure space at a flow rate of a corresponding size comprises the following steps:
judging whether the VOL at the current value of the oxygen content in the enclosure space is larger than the VOL1, if so, delivering nitrogen flow into the enclosure space at a flow rate Q1;
judging whether the current value VOL of the oxygen content in the enclosure space is smaller than VOLn and larger than VOLm or not, if so, conveying nitrogen flow into the enclosure space at a flow rate Q2;
judging whether the VOL at the current value of the oxygen content in the enclosure space is less than or equal to VOL1 and more than or equal to VOLn, if so, conveying nitrogen flow into the enclosure space at a flow Q, wherein Q1 is more than or equal to Q2, and Q is only reduced and not increased along with the increase of the nitrogen purity;
the nitrogen making device is provided with K pipelines leading to the enclosure space, each pipeline is provided with a throttle valve, the throttle valves are arranged from large to small according to the maximum flow of each pipeline, the throttle valves arranged on each pipeline are marked as L1, L2, … and LK, and for the throttle valve Li, the gear of the throttle valve is marked as Li from large to small 1 ，Li 2 ，…，Li ji Wherein i is a positive integer, i is more than or equal to 1 and less than or equal to K, and ji is the gear number of the ith throttle valve;
the flow Q1 corresponds to the flow when the throttle valves L1, L2, … and LK are all opened at the maximum gear; the flow rate Q2 corresponds to the flow rate at which the throttle valve LK opens the minimum gear;
every time the nitrogen purity is improved by one grade, the change quantity of the throttle valve group gear consisting of K throttle valves is
［
］；
N values of the oxygen content gradient value satisfy:
C 0 （n+1）=
wherein: c 0 Is a positive integer and not less than 1;
the control method of the hypoxia controlled atmosphere system further comprises the following steps:
adjusting the number n of the oxygen content gradient values according to the cycle number to ensure that n satisfies the following conditions:
C t （n+1）=
C t =C 0 -t
wherein: t is the number of times the system has cycled, and t remains unchanged after reaching a set maximum value.
2. The method as claimed in claim 1, wherein the nitrogen generator includes a pair of air exhaust pipes, and the valves are disposed on the exhaust pipes, and before the first introduction of nitrogen into the enclosure, the method further includes:
obtaining the nitrogen purity of the nitrogen making device;
judging whether the nitrogen purity of the nitrogen making device is greater than 1-VOL1, if so, closing throttle valves L1, L2, … and LK, and opening an exhaust pipeline;
acquiring the purity of nitrogen discharged by an exhaust pipeline;
and judging whether the purity of the nitrogen discharged by the exhaust pipeline is greater than 1-VOL1, if so, opening throttle valves L1, L2, … and LK, and closing the exhaust pipeline.
3. The method for controlling a hypoxic atmosphere system according to claim 1, further comprising:
judging whether the current value of the oxygen content in the enclosure space reaches a target value VOLm of the oxygen content in the enclosure space, if so, controlling the nitrogen making device to enter a standby state;
repeating the previous step at a set time interval.
4. A hypoxic modified atmosphere system, the hypoxic modified atmosphere system comprising:
the nitrogen making device is used for sucking air and purifying to obtain nitrogen with required purity;
the inlet end of the humidity control device is connected with the nitrogen production device through a plurality of pipelines, and the outlet end of the humidity control device is connected with the enclosure space and used for adjusting the humidity of nitrogen introduced into the enclosure space; and
a control system electrically connected to the nitrogen generator and the humidity regulator, respectively, for performing the method of controlling the hypoxic gas conditioning system according to any one of claims 1 to 3.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2819799A1 (en) * | 1977-12-30 | 1979-07-12 | Sibe | DEVICE FOR THE FUEL SUPPLY OF A COMBUSTION ENGINE |
| CN1059130A (en) * | 1990-07-23 | 1992-03-04 | 联合碳化工业气体技术公司 | Improved membrane/deoxo control method and system |
| CN1118759A (en) * | 1994-06-15 | 1996-03-20 | 运载器有限公司 | Controlled atmosphere system for a refrigerated container |
| CN1119612A (en) * | 1994-06-15 | 1996-04-03 | 运载器有限公司 | Pre-trip system for a controlled atmosphere system for a refrigerated container |
| CN2709525Y (en) * | 2004-04-22 | 2005-07-13 | 东南大学 | Pile end concrete placing device |
| JP2009121428A (en) * | 2007-11-19 | 2009-06-04 | Nissan Motor Co Ltd | Control device for internal combustion engine |
| CN104386362A (en) * | 2014-11-13 | 2015-03-04 | 天津森罗科技股份有限公司 | Controlled atmosphere cultural relic protecting device and controlled atmosphere cultural relic protecting process |
| CN106599402A (en) * | 2016-11-29 | 2017-04-26 | 天威保变（秦皇岛）变压器有限公司 | MATLAB-based suit cutting and splicing calculation method for silicon steel sheets |
| CN108671969A (en) * | 2018-05-14 | 2018-10-19 | 北京强度环境研究所 | Air ventilation device |
| CN108681636A (en) * | 2018-05-16 | 2018-10-19 | 国网山东省电力公司电力科学研究院 | A kind of high-frequency inverter Repetitive controller Parameters design based on flow diagram |
| CN110583611A (en) * | 2019-09-29 | 2019-12-20 | 佛山市嘉瑞达科技有限公司 | Device and method for regulating insecticidal and storage maintenance gas |
| CN210671826U (en) * | 2019-09-29 | 2020-06-05 | 佛山市嘉瑞达科技有限公司 | Insecticidal and storage maintenance gas adjusting device |
| CN111838094A (en) * | 2020-08-17 | 2020-10-30 | 天津森罗科技股份有限公司 | Low-oxygen controlled-atmosphere insecticidal system and low-oxygen controlled-atmosphere insecticidal method |
| CN212017400U (en) * | 2019-12-01 | 2020-11-27 | 江苏恒阳自控科技有限公司 | Ammonia control valve group system |
| CN114061098A (en) * | 2022-01-17 | 2022-02-18 | 深圳市华图测控系统有限公司 | Method and device for automatically reducing power consumption of low-oxygen constant-humidity storage system and computer equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451271C (en) * | 2006-12-01 | 2009-01-14 | 华南理工大学 | Storied building fume centralized discharge monitoring system and method thereof |
| CN106593527B (en) * | 2016-12-27 | 2018-11-02 | 浙江恩大施福软件科技有限公司 | Nitrogen protection tunnel pushed bat kiln atmosphere automatic regulating system |
-
2022
- 2022-06-22 CN CN202210712003.2A patent/CN114779865B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2819799A1 (en) * | 1977-12-30 | 1979-07-12 | Sibe | DEVICE FOR THE FUEL SUPPLY OF A COMBUSTION ENGINE |
| CN1059130A (en) * | 1990-07-23 | 1992-03-04 | 联合碳化工业气体技术公司 | Improved membrane/deoxo control method and system |
| CN1118759A (en) * | 1994-06-15 | 1996-03-20 | 运载器有限公司 | Controlled atmosphere system for a refrigerated container |
| CN1119612A (en) * | 1994-06-15 | 1996-04-03 | 运载器有限公司 | Pre-trip system for a controlled atmosphere system for a refrigerated container |
| CN2709525Y (en) * | 2004-04-22 | 2005-07-13 | 东南大学 | Pile end concrete placing device |
| JP2009121428A (en) * | 2007-11-19 | 2009-06-04 | Nissan Motor Co Ltd | Control device for internal combustion engine |
| CN104386362A (en) * | 2014-11-13 | 2015-03-04 | 天津森罗科技股份有限公司 | Controlled atmosphere cultural relic protecting device and controlled atmosphere cultural relic protecting process |
| CN106599402A (en) * | 2016-11-29 | 2017-04-26 | 天威保变（秦皇岛）变压器有限公司 | MATLAB-based suit cutting and splicing calculation method for silicon steel sheets |
| CN108671969A (en) * | 2018-05-14 | 2018-10-19 | 北京强度环境研究所 | Air ventilation device |
| CN108681636A (en) * | 2018-05-16 | 2018-10-19 | 国网山东省电力公司电力科学研究院 | A kind of high-frequency inverter Repetitive controller Parameters design based on flow diagram |
| CN110583611A (en) * | 2019-09-29 | 2019-12-20 | 佛山市嘉瑞达科技有限公司 | Device and method for regulating insecticidal and storage maintenance gas |
| CN210671826U (en) * | 2019-09-29 | 2020-06-05 | 佛山市嘉瑞达科技有限公司 | Insecticidal and storage maintenance gas adjusting device |
| CN212017400U (en) * | 2019-12-01 | 2020-11-27 | 江苏恒阳自控科技有限公司 | Ammonia control valve group system |
| CN111838094A (en) * | 2020-08-17 | 2020-10-30 | 天津森罗科技股份有限公司 | Low-oxygen controlled-atmosphere insecticidal system and low-oxygen controlled-atmosphere insecticidal method |
| CN114061098A (en) * | 2022-01-17 | 2022-02-18 | 深圳市华图测控系统有限公司 | Method and device for automatically reducing power consumption of low-oxygen constant-humidity storage system and computer equipment |
Non-Patent Citations (2)
| Title |
|---|
| 厦门某工学院宿舍热水系统设计分析;林志瑛;《中国新技术新产品》;20120610(第11期);全文 * |
| 基于改进CamShift的多场景接力跟踪;曲巨宝;《重庆师范大学学报(自然科学版)》;20101115(第06期);全文 * |
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