CN218281542U - Gas distribution system - Google Patents

Abstract

The utility model relates to an air distribution system, wherein the air distribution system includes nitrogen gas source, air source, a plurality of gas mixing unit and distribution control system, wherein, the nitrogen gas source is configured to provide nitrogen gas, the air source is configured to provide fresh air; the nitrogen input end and the fresh air input end of each gas mixing unit are respectively connected with the nitrogen source and the air source through corresponding gas conveying pipelines, and the output ends of the gas mixing units are connected to corresponding target spaces through mixed gas output pipelines; the gas distribution control system is configured to control the gas distribution of the target space by the input end and the output end of the mixing unit according to the gas distribution flow. The utility model discloses can be simultaneously for a plurality of target space distribution to have the same or different oxygen content in the target space that makes the difference, equipment area is little, the high-usage, has both saved the resource, has made things convenient for the user again.

Description

Gas distribution system

Technical Field

The present invention relates to a low oxygen environment system, and more particularly to a gas distribution system for delivering gas to a closed space to obtain a low oxygen environment.

Background

Due to the rapid development of nitrogen production technology in recent years, nitrogen production technology is being used in more and more fields. The purpose of cultural relic protection is achieved by applying a nitrogen generation system to obtain a low-oxygen environment in the field of cultural relic protection, and in the field of physical training and the like, a corresponding training simulation environment is obtained by applying the nitrogen generation system to charge nitrogen into a training room. In the prior art, a closed space (such as a cultural relic preservation room or a hypoxia training room) is connected with a set of hypoxia regulation and control system, and the hypoxia regulation and control system comprises a set of nitrogen making equipment and a control system, wherein the nitrogen making equipment comprises an air compressor, a nitrogen making machine, a gas distribution device, a valve pipeline and the like, and the altitude in the airtight space can be randomly regulated by regulating and controlling the nitrogen making equipment through the control system.

However, whether in the field of civil insurance or the field of hypoxic sports, it is often necessary to obtain different hypoxic environments in multiple spaces, for example, the hypoxic sports industry involves rooms with different functions such as hypoxic training rooms, rest rooms, sleeping rooms, etc. with different oxygen contents; in the cultural protection industry, different collections and different oxygen contents of required environments need to be preserved in separate rooms or spaces. According to the prior art, each closed space corresponds to one set of nitrogen making system, and gas is input for it through its special distribution pipeline, and when closed space is more, nitrogen making equipment is many, will cause the big, with high costs problem of whole equipment room occupation space. And when the closed space is in a low-oxygen maintaining state, the nitrogen demand is less, the load of a nitrogen making system is small, and the waste of equipment resources is caused. Therefore, the gas distribution mode of the existing nitrogen making system is far from meeting the requirements of some industries needing to provide low-oxygen environment.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model provides a gas distribution system can be simultaneously for the target space distribution gas that a plurality of different environment required, and area is little, equipment resource utilization is high.

In order to solve the technical problem, the utility model provides an air distribution system, including nitrogen gas source, air source, a plurality of gas mixing unit and distribution control module, wherein, the nitrogen gas source is disposed in order to provide nitrogen gas; the air source is configured to provide fresh air; the nitrogen input end and the fresh air input end of each gas mixing unit are respectively connected with the nitrogen source and the air source through corresponding gas conveying pipelines, and the output ends of the gas mixing units are connected to corresponding target spaces through mixed gas output pipelines; the gas distribution control module is configured to control the gas distribution of the target space by the input end and the output end of the mixing unit according to the gas distribution flow.

Preferably, the mixing unit further comprises a return air input end, the return air input end is provided with a purifying and filtering device, and the return air input end is communicated with the return air end of the target space through a return air pipeline.

Preferably, the return air end of the target space is provided with a fan to discharge part of the air in the target space to the return air duct.

Preferably, the gas mixing unit is a sealed space.

Preferably, a gas mixing device is arranged in the sealed space.

Preferably, the nitrogen source comprises a plurality of air compression units and a plurality of nitrogen making units; wherein the plurality of air compression units are connected in parallel, and the plurality of nitrogen generation units are connected in parallel; the output ends of the plurality of air compression units are connected to the air input ends of the plurality of nitrogen making units through compressed air pipelines, and the output ends of the plurality of nitrogen making units are connected to the nitrogen input end of the gas mixing unit through a nitrogen conveying pipeline.

Preferably, the air source comprises a fan, and the flow of the air is adjusted by adjusting the frequency of the fan or adjusting the opening degree of the fresh air input end valve.

Preferably, the fresh air input end or the air source outlet is provided with a purifying device to purify the frequency of an air conditioning fan entering the air mixing unit or adjust the flow of the opening-adjusting air of the valve of the fresh air input end.

Preferably, the nitrogen gas source further comprises a first gas storage tank configured to be connected between the air compression unit and the nitrogen generation unit, configured to store compressed air output by the air compression unit.

Preferably, the nitrogen source further comprises a second gas storage tank for storing nitrogen output by the nitrogen making unit; the output end of the second air storage tank is connected to a nitrogen conveying pipeline.

The utility model discloses can be simultaneously for a plurality of target space distribution to make different target space have the same or different oxygen content, equipment area is little, the high-usage, has both saved the resource, has made things convenient for the user again.

Drawings

Preferred embodiments of the present invention will be described in further detail below with reference to the attached drawings, wherein:

fig. 1 is a schematic block diagram of a gas distribution system according to an embodiment of the present invention;

fig. 2 is a schematic view of a gas mixing unit connected to a target space in a gas distribution system according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a gas mixing unit according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a gas mixing unit according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a gas mixing unit according to another embodiment of the present invention;

fig. 6 is a functional block diagram of a nitrogen plant according to an embodiment of the present invention;

fig. 7 is a schematic block diagram of a nitrogen plant according to another embodiment of the present invention;

FIG. 8 is a schematic block diagram of a nitrogen plant according to yet another embodiment of the present invention;

fig. 9 is a schematic diagram of a gas distribution control system according to an embodiment of the present invention; and

fig. 10 is a schematic diagram of a valve timing control system according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized and structural, logical or electrical changes may be made to the embodiments of the present application.

In industries requiring hypoxic environments, such as sports gyms, gymnasiums, and cultural relic preservation institutions, which have multiple spaces with different oxygen content requirements, such as sports gyms, which may provide multiple sports gyms and gymnasiums, the cultural relic preservation institution includes multiple cultural relic preservation rooms, and these spaces with different oxygen content requirements are hereinafter referred to as target spaces. The utility model provides a gas distribution system can be simultaneously to a plurality of target space transported gas, makes the oxygen content in the target space reach and maintain the target value.

Fig. 1 is a schematic block diagram of a gas distribution system according to an embodiment of the present invention. The air distribution system 1 in the present embodiment includes a nitrogen gas source 10, an air source 11, a plurality of air mixing units 12, and an air distribution control system 13. The nitrogen source 10 may be a nitrogen generating device or a nitrogen gas storage tank, and supplies nitrogen gas to the plurality of gas mixing units 12 through the nitrogen gas transmission pipeline 100. The air source 11 may be a fan with a certain power and variable frequency and adjustable wind speed, and supplies fresh air to the plurality of air mixing units 12 through the fresh air conveying pipeline 110. In some embodiments, the air source includes a purifying device, such as a filter, to remove harmful substances from the air. Each gas mixing unit 12 may be a gas tight box with a nitrogen input, a fresh air input, and a mixed gas output. The nitrogen input end of the gas mixing unit 12 is connected to the nitrogen conveying pipeline 100, the fresh air input end is connected to the fresh air conveying pipeline 110, and the gas mixing output end is connected to the air inlet of a target space R through the gas mixing conveying pipeline 120. The air distribution control system 13 is respectively connected with the nitrogen source 10, the air source 11, the plurality of air mixing units 12 and the target space R, and is used for sending out a control instruction according to the process and obtaining detection data from the target space.

When oxygen reduction starts to be performed on one or more target spaces R, the gas distribution system in the present embodiment is started, and the gas distribution control system 13 issues a command to open the nitrogen input end and the gas mixing output end of the gas mixing unit 12 corresponding to the target spaces. The nitrogen gas in the nitrogen gas source 10 is input to the plurality of gas mixing units 12 through the nitrogen gas delivery pipe 100 and is delivered into the corresponding target spaces. The target space has one or more vent holes, and when nitrogen gas is fed into the corresponding target space, the internal pressure of the target space is higher than the external pressure, and the air inside the target space is diffused to the outside of the target space through the vent holes, thereby achieving gas replacement to reduce the oxygen content in the target space, which is referred to as a gas replacement stage. The oxygen sensor in the target space sends the detected oxygen content data to the gas distribution control system 13, and the gas distribution control system 13 monitors the oxygen content of all the target spaces. When the oxygen content in a certain target space reaches a preset value, for example, reaches 0.5% -1.5% lower than the target oxygen content, at this time, fresh air needs to be input, the air distribution control system 13 sends an instruction to open the fresh air input end of the air mixing unit 12 corresponding to the target space, the air source 11 provides fresh air to the air mixing unit 12 through the fresh air conveying pipeline 110, and low-oxygen fresh air or high-oxygen fresh air meeting the requirement is mixed in the air mixing unit 12 and is input to the target space. When the oxygen content in the target space reaches the preset value, the oxygen content in the target space is maintained within a range allowed to float, for example, the target oxygen content is +/-1% by dynamically adjusting the nitrogen input flow and the air input flow, and the stage is called a maintaining stage. In the maintaining stage, the gas amount entering the target space can be properly reduced, and the oxygen content and the carbon dioxide content in the target space are ensured to be maintained at proper levels.

Wherein, for convenient gaseous transport of control and flow, the utility model discloses be provided with pipeline valve and controller on the corresponding pipeline of system, like the solenoid valve. Referring to fig. 1, electromagnetic valves are disposed at two input ends and one output end of each gas mixing unit, and the gas and flow rate input to the gas mixing unit can be controlled by controlling the electromagnetic valves to be fully opened or partially opened. For example, in the gas replacement stage, the electromagnetic valves at the nitrogen input end are all opened, and the electromagnetic valve at the fresh air input end is closed, so that nitrogen can be input into the target space at the highest speed; in the maintenance stage, the required gas amount is small, so that the electromagnetic valve at the nitrogen gas conveying end can be opened only partially, and the electromagnetic valve at the fresh air input end is opened partially, so that the gas is conveyed in a small amount.

To sports training room, can lead to the oxygen content to reduce, the carbon dioxide risees because of indoor personnel's breathing activity to along with the internal gas of personnel exhalation, the health gives out smell and so on, can make the air quality in the target space worsen gradually, the oxygen content is less than the target value, therefore, the utility model discloses keeping these environmental changes of stage in order to adapt to the target space to target space continuous input gas, keeping that the gas content in the target space is stable, clean.

In some embodiments, as shown in fig. 2, the target space is opened with a return air inlet connected to a return air input end of the air mixing unit 12 through a return air pipe 121, and the air part exhausted from the target space flows back to the air mixing unit 12. In the maintenance stage, the solenoid valve of the gas return pipeline is opened, and the target space at the moment provides a part of gas for the gas mixing unit, so that the requirement on a nitrogen gas source can be reduced, and the energy consumption is saved. In some embodiments, in order to effectively return the gas in the target space to the gas mixing unit 12, a fan is installed at the return air inlet of the target space, so that the gas in the target space is discharged to the return air duct. In some embodiments, the air return pipeline is provided with an air purifying and filtering device, or the air purifying and filtering device is arranged at the air return input end of the air mixing unit 12.

In the above embodiment, the air mixing unit is a sealed space, which may be a box body, and an air inlet and an air outlet are provided at suitable positions of the box body. In order to better mix the nitrogen and fresh air fed simultaneously, as shown in fig. 3, only one inlet port may be provided, which connects the nitrogen inlet pipe and the air inlet pipe having relatively small diameters through a pipe having a large diameter and a two-in one-out valve 123, wherein a check valve is provided in a valve body or pipe connecting the nitrogen inlet pipe and the air inlet pipe, so that the gas is mixed in the pipe having a large diameter before entering the cabinet. Another way is to arrange a stirring device in the box body, as shown in fig. 4, and arrange a stirring fan 124 with proper wind speed in the box body. A flow guide grid may also be provided in the box, as shown in fig. 5, the air and nitrogen entering the box are mixed in the first grid 125 and flow to the outlet along the space separated by the grid, and the two gases are mixed uniformly during the flow process.

The utility model provides a nitrogen gas source can be the nitrogen gas holder, also can be nitrogen making equipment. Fig. 6 is a schematic block diagram of a nitrogen plant according to an embodiment of the present invention. In this embodiment, the nitrogen source 10 is a set of nitrogen making equipment disposed between the equipment, and includes an air compressing unit 101 and a nitrogen making unit 102. The air compressing unit 101 provides compressed air for the nitrogen generating unit, and the compressed air at least comprises a motor, a compressor, an air filter, an oil-gas separator and the like, wherein the compressor can be a double-screw compressor, and can also be other types of compressors, such as a single-screw compressor, a piston compressor, a roots compressor, a sliding vane compressor and the like. Since the compressor generates heat during operation, the air compressing unit further includes a heat dissipating system and an air cooler for dissipating heat from the compressor and cooling the compressed air, respectively. Clean compressed air obtained after oil-gas separation, cooling and air filtration is delivered to the nitrogen production unit 102 through a delivery pipeline. The nitrogen production unit 102 separates oxygen in the air by using a physical method to obtain nitrogen, and a nitrogen production method of a membrane air separation method is preferably selected, so that the nitrogen production unit is high in gas cleanliness, small in equipment volume and high in gas production rate. The use of a molecular sieve air separation (PSA) nitrogen generation unit is not recommended. In summary, the nitrogen making unit can be determined to make nitrogen with different purities according to different requirements, such as one or more of 85%, 90%, 95%, 98%, 99% and the like.

Fig. 7 is a schematic block diagram of a nitrogen plant according to another embodiment of the present invention. In the present embodiment, a plurality of air compressing units 101 are included, and the plurality of air compressing units 101 are coupled in parallel; a plurality of nitrogen generation units 102 coupled in parallel. The output ends of the plurality of air compression units 101 are connected to the air input end of the nitrogen production unit 102 through a compressed air pipe. The equipment indexes of the air compressing units 101, such as the exhaust pressure and the exhaust amount, may be the same or different. In one embodiment, the displacement of one air compression unit may supply one or two nitrogen-producing units. The output nitrogen flow and purity of the nitrogen making unit can be the same or different. For example, the nitrogen gas with one or more purities of 85%, 88%, 90%, 95%, 99% and the like can be output respectively.

In some embodiments, to prevent the air in the compressed air pipeline from flowing back into the air compression units 101 when the air compression units 101 are not activated, a one-way shutoff valve is connected to the output of each air compression unit 101. Each air compression unit 101 is provided with an electric control unit, and the operation of one air compression unit can be controlled by controlling a starting switch. An electromagnetic stop valve is installed at the air input end of the nitrogen making unit, so that the electromagnetic valve is controlled according to different nitrogen demand quantities to start different nitrogen making units 102. In this embodiment, different air compressing units 101 and nitrogen making units 102 can be combined according to the required nitrogen purity and the required amount of nitrogen to make nitrogen amounts meeting different requirements. For example, when oxygen reduction is required for a target space, one or two air compression units are determined to be started according to the volume of the target space, the target oxygen content and indexes of the air compression units and the nitrogen generation units. When oxygen reduction is needed for a plurality of target spaces, the number of the air compression units and the nitrogen production units, and the specific air compression units and the nitrogen production units can be determined through calculation. In the control system, each air compression unit and each nitrogen production unit have unique identification and index data thereof.

Fig. 8 is a schematic block diagram of a nitrogen plant according to another embodiment of the present invention. In this embodiment, two additional gas storage tanks are provided on the basis of the embodiment shown in fig. 7, namely, a first gas storage tank 103 is provided in the air compression unit, and a second gas storage tank 104 is provided in the nitrogen production unit. The output pipeline of the air compression unit is respectively connected with the air inlet end of the first air storage tank 103 and the compressed air conveying pipeline through a three-way valve. Under the control of the control command, the compressed air output by the air compressing unit is input into the first air storage tank 103 for storage or is output to the nitrogen generating unit. The output end of the first air storage tank 103 is connected to a compressed air delivery pipeline through an electromagnetic stop valve, when air needs to be provided by the first air storage tank 103, the electromagnetic stop valve is controlled to be opened, and the compressed air in the first air storage tank 103 is delivered to the nitrogen production unit 102 through the compressed air delivery pipeline. When the air supply is needed for the nitrogen making unit, the air supply can be provided by an air compression unit, and also can be provided by the first air storage tank 103.

The output pipeline of the nitrogen making unit is respectively connected with the air inlet end of the second air storage tank 104 or the nitrogen conveying pipeline through a three-way valve. When nitrogen is required to be supplied to the target space, the nitrogen can be supplied by a nitrogen production unit or the second gas storage tank 104. To reduce piping, the output of the second reservoir 104 is connected to a nitrogen delivery line through an electromagnetic shut-off valve.

In some embodiments, the air source 11 of the present invention includes a fan and a fresh air delivery pipe connected to an output end of the fan. The fan can be installed outside the target space and started or stopped according to a control command. In some embodiments, the motor of the fan can adopt variable frequency speed regulation, so that the fresh air flow of the fan can be regulated.

Fig. 9 is a schematic diagram of a gas distribution control system according to an embodiment of the present invention. The gas distribution control system 13 at least includes a processor 130 and pipeline valve controllers at the input and output ends of each gas mixing unit, such as a nitrogen input controller 131, a fresh air input controller 132, and a gas mixing output controller 133. The controllers can control the opening, closing and opening of the pipeline valve. In some embodiments, it is connected to its valve, such as a solenoid valve. Since each target space corresponds to one mixed unit 12, a plurality of groups of nitrogen input end controllers 131, fresh air input end controllers 132 and mixed air output end controllers 133 are connected with the processor 130. The processor 130 may be any industrial controller, such as a PLC controller, a single chip microcomputer, etc. The processor 130 is internally provided with a gas distribution processing flow program, and outputs control instructions to the nitrogen input end controller 131, the fresh air input end controller 132 and the gas mixing output end controller 133 of the corresponding gas mixing unit according to the flow so as to control the opening, closing or opening of the corresponding pipeline valve. In the present embodiment, the processor 130 communicates with the upper computer 2 to obtain necessary data or instructions from the upper computer 2.

The process of distributing gas for the target space in this embodiment is as follows:

first, the processor 130 receives a distribution instruction and corresponding data from the upper computer 2. The data comprises the identity of the target space needing gas distribution. For example, 3 equal-volume sports training rooms, wherein room 1 is 5000m in altitude, room 2 is 4000m in altitude, and room 3 is 3000m in altitude. According to the corresponding relationship between the altitude and the oxygen content, the oxygen content in the air is 11.19% at an altitude of 5000m, 12.74% at an altitude of 4000m, and 16.1% at an altitude of 3000m.

The processor 130 sends an open command to the nitrogen input terminal controller and the mixed gas output terminal controller of the mixed gas unit corresponding to the target space. The nitrogen input end controller of the gas mixing unit opens the nitrogen input pipeline valve, nitrogen is input from the nitrogen source 10 to the gas mixing unit 12, the gas mixing output end controller opens the gas mixing output pipeline valve, and nitrogen is input into the target space, and the gas replacement stage is performed at this moment. In this case, the three rooms were simultaneously subjected to gas replacement with the same nitrogen purity and flow rate.

The upper computer monitors the oxygen content of the three rooms and sends a maintenance instruction to the processor 130 when the oxygen content of the rooms reaches a preset value.

The processor 130 judges whether a maintaining instruction sent by the upper computer 2 is received, wherein the maintaining instruction comprises an identity of a target space. If a maintaining instruction is received, the oxygen content in the target space reaches a preset value. In the three rooms, since the altitude of the room 3 is 3000m lowest, the oxygen content is highest, and the preset value, such as 95% of the target oxygen content, is reached first in the gas replacement process, and then the room 2 and the room 3 are arranged in sequence.

The processor 130 sends an opening instruction to the fresh air input end controller of the air mixing unit corresponding to the target space and the fan of the air source, opens the fresh air conveying pipeline, starts the fan, provides fresh air to the air mixing unit 12, and simultaneously times. The nitrogen and the air are mixed in the gas mixing unit 12 and are delivered to the target space through the gas mixing output end.

When the timing reaches a preset time period, the processor 130 sends instructions to the nitrogen input end controller and the fresh air input end controller, so that the corresponding valves are only partially opened, namely, the opening of the valves is reduced, and the air volume input into the target space is reduced. At this point the sustain phase is entered. In this embodiment, the upper computer 2 issues a maintaining instruction to the processor 130 when the oxygen content in the target space approaches the target, and since the oxygen content at this time does not reach the target oxygen content, the processor inputs the atmospheric air amount into a predetermined time period when receiving the maintaining instruction, and the value of the time period may be obtained through experiments or calculations, for example, 2 to 10 minutes, and is specifically related to the size of the target space and the input flow rate of the air mixing unit.

The processor 130 sends an opening instruction to the controller on the return air duct, and opens the valve on the return air duct, so that part of the gas exhausted from the target space flows back into the gas mixing unit. When the fan is installed at the air return end of the target space, the rotating speed of the air return fan can be controlled to control the air return quantity, for example, the air return quantity can be 20% -70% of the air inlet quantity, and therefore nitrogen can be effectively saved.

In the maintaining stage, corresponding adjustment is carried out according to the instruction of the upper computer, for example, the nitrogen input end controller is controlled to open a valve of the nitrogen input end to increase the nitrogen input amount, so that the oxygen content of the target space is further reduced. Or the fresh air input end controller is controlled to open a valve of the fresh air input end to increase the air input quantity, so that the oxygen content of the target space is improved. In some embodiments, the maintaining stage detects the oxygen content in the target space in real time, and if the oxygen content exceeds the set value range, the adjustment is performed in time.

In the air distribution process, if the processor 130 receives an air distribution stop instruction from the upper computer to a certain target space, it sends a close instruction to each pipeline valve controller and equipment related to the target space, closes the corresponding pipeline valve, and stops the corresponding equipment. For example, regarding its nitrogen, air input line valves, mixture output line valves, return line valves of the target space, if any, the return fan is stopped.

In this embodiment, the processor 130 does not make excessive judgment work, and the upper computer synthesizes the environment of the target space and the internal algorithm to obtain the corresponding instruction, so that the requirement on the processor 130 is not high, the processing response speed is high, and the cost is low.

Fig. 10 is a schematic diagram of a valve timing control system according to another embodiment of the present invention. Compared with the embodiment shown in fig. 9, the present embodiment further includes a human-machine interface 134 and an oxygen sensor 135 installed in the target space. The human-machine interface 134 is used at least for inputting parameters, instructions and displaying data. For example, the worker may input the identification of the target space that needs to be distributed in the human-computer interface 134, set the corresponding target oxygen content, and send a distribution instruction after the setting is completed.

The air distribution process in the processor 130 is similar to that in the previous embodiment, except that the processor 130 receives the identification of the target space, the target oxygen content and the air distribution instruction, which need air distribution, from the human-computer interface 134, receives the detection data of the oxygen sensor in the target space, determines whether the maintenance stage is reached according to the detection data, and dynamically controls the controller of each pipeline valve according to the detection data of the oxygen sensor in the target space to adjust the nitrogen gas inflow and the fresh air inflow, so as to maintain the oxygen content of the target space within the allowable variation range of the target oxygen content, such as upper and lower 2% of the target oxygen content value. On the other hand, the processor 130 processes the detection data received from the oxygen sensor into an oxygen content, and displays the oxygen content on the human-machine interface 134, so that the staff or the user can clearly see the oxygen content in the current target space, or sends the data to the upper computer 2.

In the foregoing embodiment, during the stage of maintaining the target oxygen content in the target space, when the nitrogen gas flow rate is adjusted, the nitrogen gas flow rate entering the target space can be controlled by controlling the opening degree of the nitrogen gas delivery pipe valve. In addition, when the nitrogen source adopts a nitrogen making device, the nitrogen making quantity of the nitrogen making device can be adjusted to control the flow quantity of the nitrogen entering the target space. Processor 130 may be in communication with the nitrogen plant to send instructions to reduce the amount of production. The nitrogen plant reduces the nitrogen production amount after receiving the command.

Similarly, when the fresh air flow entering the target space is regulated, the opening degree of a fresh air conveying pipeline valve is reduced or increased to reduce or improve the fresh air input flow; or the fresh air input flow is reduced by reducing or increasing the rotating speed of the fresh air fan.

The utility model discloses at the in-process for a target space distribution, can also adjust the target value of oxygen content in the space at the difference. For example, the worker may set a plurality of altitudes in advance, set a maintenance time for each altitude, and set an end condition such that the room is not used any more when the last altitude maintenance time is ended. The method comprises the following specific steps:

the processor 130 receives air distribution instructions and corresponding data from the human machine interface, the data including a plurality of altitudes and corresponding times, and an end condition. The corresponding relationship between altitude and oxygen content is stored in the internal memory of the processor 130.

And controlling corresponding equipment such as a valve controller and the like to enable the oxygen content in the target space to reach a first oxygen content with a first preset altitude, and timing.

And when the timing reaches the maintaining time of the first preset altitude, controlling corresponding equipment such as a valve controller and the like to enable the oxygen content in the target space to reach a second oxygen content of a second preset altitude, and timing.

And when the timing reaches the maintaining time of the second preset altitude, controlling the corresponding valve to control the corresponding valve controller and other equipment so as to enable the oxygen content in the target space to reach the second oxygen content of the second preset altitude, and timing.

Repeating the steps until the maintaining time of the last preset altitude is timed, closing the relevant valve and stopping the corresponding equipment.

The utility model discloses the simulation altitude that the ability simultaneous control is the same or different in a plurality of target spaces, both made things convenient for the user, saved the resource again.

The above embodiments are provided only for the purpose of illustration, and are not intended to limit the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should also belong to the scope of the present invention.

Claims (10)

1. A gas distribution system, comprising:

a nitrogen source configured to provide nitrogen;

an air source configured to provide fresh air;

the system comprises a plurality of gas mixing units, a nitrogen source, a fresh air source, a nitrogen gas source, a fresh air source, a mixed gas output pipeline and a plurality of gas mixing units, wherein the nitrogen gas input end and the fresh air input end of each gas mixing unit are respectively connected with the nitrogen gas source and the air source through the corresponding gas transmission pipelines; and

and the gas distribution control module is configured to control the gas distribution of the target space by the input end and the output end of the mixing unit according to the gas distribution flow.

2. The air distribution system of claim 1, wherein the mixing unit further comprises a return air input, a purification filter is mounted at the return air input, and the return air input is communicated with the return air inlet of the target space through a return air pipeline.

3. The gas distribution system of claim 2, wherein the return air inlet of the target space is provided with a fan to discharge part of the gas in the target space to the return air duct.

4. The gas distribution system of claim 1, wherein the gas mixing unit is a sealed space.

5. The air distribution system of claim 4, wherein the sealed space has an air mixing device disposed therein.

6. The air distribution system of claim 1 wherein the air source comprises a fan, and the flow of air is adjusted by adjusting the frequency of the fan or adjusting the opening of the fresh air input valve.

7. The air distribution system of claim 6, further comprising a purification device at the fresh air input or the air source outlet to purify the air entering the air mixing unit.

8. The gas distribution system of claim 1, wherein the nitrogen source comprises a plurality of air compression units and a plurality of nitrogen generation units; wherein the plurality of air compression units are connected in parallel and the plurality of nitrogen generation units are connected in parallel; the output ends of the plurality of air compression units are connected to the air input ends of the plurality of nitrogen making units through compressed air pipelines, and the output ends of the plurality of nitrogen making units are connected to the nitrogen input end of the gas mixing unit through a nitrogen conveying pipeline.

9. The air distribution system of claim 8, wherein the nitrogen source further comprises a first air tank configured to be connected between the air compression unit and the nitrogen generation unit, configured to store compressed air output by the air compression unit.

10. The gas distribution system of claim 8, wherein the nitrogen source further comprises a second gas tank for storing nitrogen gas output by the nitrogen generation unit; the output end of the second air storage tank is connected to a nitrogen conveying pipeline.

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