CN209254647U - A kind of high-precision air distributing device - Google Patents
A kind of high-precision air distributing device Download PDFInfo
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- CN209254647U CN209254647U CN201821154827.8U CN201821154827U CN209254647U CN 209254647 U CN209254647 U CN 209254647U CN 201821154827 U CN201821154827 U CN 201821154827U CN 209254647 U CN209254647 U CN 209254647U
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Abstract
The utility model provides a kind of high-precision air distributing device, which includes: the flow controller of multiple single processes with same nominal process；Air intake control valve is connected with the input end of flow controller, for controlling whether the flow controller is connected with one of them of sample gas channel and spirit channel；Processor is connected with air intake control valve, and for m flow controller to be connected with sample feed channel, n flow controller is connected with spirit pipeline.The utility model is avoided that the correction factor of high precision flow is brought into final distribution concentration calculation, realizes high-precision distribution.
Description
Technical field
The utility model relates to distribution technical field more particularly to a kind of high-precision air distributing devices.
Background technique
Distribution is that certain density calibrating gas is accurately configured to (dilution) to come out by predetermined ratio, can be used for Standard Gases
Body proportion, dilution, instrument are linearly tested.
In the prior art, if Chinese patent literature CN203075910U is by the regulatable flow controller of multiple flows and same
One outlet channel is connected, by control each flow controller to the ratio adjustment of each road gas flow realize gas dilution,
Mixed process.At this point, the error of multiple flow controller has inevitably been mixed into distribution process, the gas finally allotted is dense
It is larger to spend error.
Due to the required precision to gas concentration is matched, high-precision distribution is always the target that distribution technical field is pursued.
Utility model content
The feature and advantage of the utility model partly state in the following description, or can be aobvious and easy from the description
See, or can be learnt and practicing the utility model.
To solve problem of the prior art, the utility model provides a kind of high-precision air distributing device, including sample gas channel, bottom
Gas channel, exit passageway, which is characterized in that the high-precision air distributing device includes:
The flow controller of multiple single processes has input end and outlet end, the flow control of the multiple single process
Device processed has same nominal process；
Air intake control valve is connected with the input end of the flow controller, for control the flow controller whether with
Sample gas channel is connected with one of them of spirit channel；
Processor is connected with the air intake control valve, for m flow controller to be connected with the sample feed channel,
N flow controller is connected with the spirit channel.
Optionally, the high-precision air distributing device includes leaving air control valve and is connected with the leaving air control valve high-precision
Flowmeter is spent, the leaving air control valve is connected with the outlet end of the flow controller and the exit passageway, for controlling
State whether flow controller is connected with one of them of the high precision flow and the exit passageway.
Optionally, the high-precision air distributing device includes check valve, and the outlet end of the flow controller is arranged in.
Optionally, the processor is also used to the flow controller being connected to sample gas channel being denoted as first flow control
Device, the flow controller being connected to spirit channel are denoted as second flow controller；And according to the first flow controller and institute
The actual flow value for stating second flow controller calculates practical distribution concentration value.
Optionally, further include display, be connected with the processor, the display is for showing that the practical distribution is dense
Angle value.
Optionally, the high-precision air distributing device includes memory, for storing each flow controller
The actual flow value that flow records after measuring via the same high precision flow.
The utility model provides a kind of high-precision air distributing device, is avoided that the correction factor of high precision flow is brought into most
In whole distribution concentration calculation, high-precision " zero error " distribution is realized.
By reading specification, the feature of these technical solutions and interior is will be best understood in those of ordinary skill in the art
Hold.
Detailed description of the invention
The utility model is specifically described below with reference to attached drawing and in conjunction with example, the advantages of the utility model and realization
Mode will be more obvious, and wherein content shown in attached drawing is only used for the explanation to the utility model, without constituting to this reality
With it is novel in all senses on limitation, in the accompanying drawings:
Fig. 1 is the flow diagram of the high-precision air distributing method of the utility model embodiment.
Fig. 2 is the structural schematic diagram of the high-precision air distributing device of the utility model embodiment.
Fig. 3 is the structural schematic diagram of the high-precision air distributing device of another embodiment of the utility model.
Fig. 4 is the structural schematic diagram of the high-precision air distributing device of another embodiment of the utility model.
Fig. 5 is the structural schematic diagram of the high-precision air distributing device of another embodiment of the utility model.
Specific embodiment
As shown in Figure 1, the utility model provides a kind of high-precision air distributing method, using the flow control of multiple single processes
Device realizes that the flow controller of the multiple single process has same nominal process；The stream of single process in the utility model
Amount controller refers to that the flow controller only has this flow controller such as a kind of flow, such as capillary type, orifice type.The list
One process can be considered as the whole flow of flow controller.
The high-precision air distributing method comprising steps of
101, default distribution concentration value is received；
102, the number m, Yi Jiyong for inputting the flow controller of sample gas are determined according to the default distribution concentration value
In the number n of the flow controller of input spirit；Wherein, m, n are natural number；
It, generally will also be in conjunction with the sample gas concentration for the sample gas that sample feed channel is passed through when determining number m, n.For example, can root
Number m, n is determined according to the ratio of sample gas concentration value and default distribution concentration value.
103, m flow controller is connected to sample gas channel, n flow controller is connected to spirit channel.
Due to the process of each flow controller be it is the same, the utility model is by determining with sample gas channel
The number for the flow controller that the number of flow controller and spirit channel are connected reaches final distribution concentration value.Citing
For, if sample gas concentration be 100%, preset distribution concentration value be 50%, at this time with the number of the flow controller in sample gas channel
And the number of flow controller that spirit channel is connected should be identical, such as all be 2, i.e. m=2, n=2, certainly
It is also possible to 1,3 or more.
In one embodiment of the utility model, after step 103, comprising:
The flow controller being connected to sample gas channel is denoted as first flow controller, the flow control being connected to spirit channel
Device processed is denoted as second flow controller；And according to the first flow controller and the actual flow of the second flow controller
Value calculates practical distribution concentration value.In the specific implementation, practical distribution concentration value can be exported and is shown, generally, actually matched
Gas concentration value is close with default distribution concentration value.
More specifically, the actual flow that can be measured by the same high precision flow each flow controller
Value, calibrates the flow of flow control.If the high precision flow correction factor is denoted as k, high precision flow measurement
The sum of actual flow value of all first flow controllers out is F1, all seconds which measures
The sum of actual flow value of amount controller is F2；Then final practical distribution concentration value Cp=kF1*C0/(kF1+kF2)=F1*C0/
(F1+F2).As it can be seen that high precision flow correction factor is will not to have an impact to final practical distribution concentration value.
Due to the flow controller using multiple single processes, and the flow controller of multiple single processes has identical volume
Constant current journey, therefore can refer to that flow controller exists to avoid the linear measurement error of the high precision flow, linear measurement error
With different correction factors when measuring different flow.Due in the utility model, the flow controller of the single process of use
Specified process when it is identical, therefore, corresponding correction factor k is also identical.
Based on any of the above embodiments, in step 103, the flow controllers that m is connected to sample gas channel with
And the n flow controllers being connected to spirit channel can be with unrestricted choice, such as has computer random to specify, it can also be by testing
Personnel specify, and the utility model is to this and with no restrictions.
It optionally, in step s 102, can be first dense according to distribution is preset in another embodiment of the utility model
The number of ratio determination the first flow controller to be chosen and second flow controller of angle value and original sample gas concentration, Huo Zhe
The ratio of the number of the number and second flow controller of one flow controller；Further according to the actual flow of each flow controller
Value, chooses specific first flow controller and second flow controller.Above-mentioned first flow controller refers to and sample gas channel
The flow controller of connection；Second flow controller refers to the flow controller being connected to spirit channel.
For example, if sample gas concentration is 100%, presetting distribution concentration value is 50%, at this point, first flow controller
The ratio of number and the number of second flow controller is 1:1；If there are four flow controller, corresponding actual flow value point
It is not 99.8ml/min, 100.2ml/min, 100.1ml/min, 99.9ml/min；When executing step 103,2 can be chosen
A first flow controller and 2 second flow controllers, actual flow value are the conduct of 99.8ml/min, 100.2ml/min
First flow controller, actual flow value is the conduct second flow controller of 100.1ml/min, 99.9ml/min, at this point, meter
The practical distribution concentration value and default distribution concentration value calculated is more consistent.
As shown in Fig. 2, the utility model also provides a kind of high-precision air distributing device, including sample gas channel 11, spirit channel
12, exit passageway 13, flow controller 20, air intake control valve 30, the processor 40 of multiple single processes.Wherein:
Flow controller 20 has input end 21 and outlet end 22；Flow controller is single process controller, and this is more
The flow controller of a single process has same nominal process.The flow controller of above-mentioned single process refers to the flow control
Device only has this flow controller such as a kind of flow, such as capillary type, orifice type.The single process can be considered as flow control
The whole flow of device.In the specific implementation, the number N of flow controller is 2-20, preferably 2-15, e.g. 3,5 or 10
It is a.
Air intake control valve 30 is connected with the input end of flow controller, for control flow controller whether with sample gas channel
It is connected with one of them of spirit channel；That is, can control flow controller and sample gas by air intake control valve 30
Channel is connected or is connected with spirit channel, or is neither connected with sample gas channel nor is connected with spirit channel.Specifically
When implementation, air intake control valve 30 can be multi-channel proportional on-off control valve；Further, it is also possible to be multiple threeway distributing valves.
Processor 40 is connected with air intake control valve 30, for m flow controller to be connected with sample feed channel 11, by n
A flow controller is connected with spirit channel 12.
In one embodiment of the utility model, processor 40 is for receiving default distribution concentration value, according to described pre-
Establishing gas concentration value determines number m, n.It, generally will also be in conjunction with the sample gas for the sample gas that sample feed channel is passed through when determining number m, n
Concentration.For example, can determine number m, n according to the ratio of sample gas concentration value and default distribution concentration value.In the utility model
In another embodiment, m, n are determined according to default distribution concentration value and sample gas concentration value by experimenter, and input everywhere
Manage device.The above-mentioned m flow controllers being connected to sample gas channel and the n flow controllers being connected to spirit channel can
With unrestricted choice, such as there is computer random specified, can also be specified by experimenter, the utility model does not do this
Limitation.
In addition, it can include memory (not shown), for storing the flow of each flow controller via same
The actual flow value recorded after one high precision flow measurement.Memory is connected with processor, for being to calculate practical distribution
Concentration value provides data and supports.
On the basis of Fig. 2 corresponding embodiment, the utility model also provides a kind of high-precision air distributing device, in addition to including
Sample gas channel 11, spirit channel 12, exit passageway 13, except multiple flow controllers 20, air intake control valve 30, processor 40.
As shown in figure 3, further including leaving air control valve 60 and the high precision flow being connected with leaving air control valve 60 50, the present embodiment
In, which can be realized simultaneously the measurement of the actual flow value of flow controller 20.
Leaving air control valve 60 is connected with the outlet end of flow controller 20 and exit passageway 13, more specifically, outlet controls
The input end of valve 60 is connected with the outlet end of flow controller 20, and the outlet end of leaving air control valve 60 is connected with exit passageway 13,
For controlling whether flow controller is connected with one of them of high precision flow and exit passageway.That is, passing through
The outlet end that leaving air control valve 60 can control flow controller is connected with high precision flow, or is connected with exit passageway
It is logical, or be not connected to high precision flow and exit passageway.Leaving air control valve 60 can be threeway calibrating valve or multichannel threeway
Combination valve.Leaving air control valve 60 can be connected with processor 40, by its switch state of 40 controller of processor.
In addition, as shown in figure 4, above-mentioned high precision flow 60 can also be connected directly between exit passageway by check valve 71
On, at this point, leaving air control valve 60 can be two-way calibrating valve or multichannel two-way combination valve.
As shown in figure 5, in the present embodiment, high-precision air distributing device includes check valve 72, flow controller is set
Outlet end, which can be set in the outlet end of each flow controller, more specifically, can be set in gas control out
The upper end of valve processed.When measuring actual flow value, after one of flow controller is connected with high precision flow, pass through list
The outlet end of other flow controllers can be closed to valve；When carrying out distribution, input end can be closed neither by check valve
Be connected the flow controller not also being connected with spirit channel with sample gas channel.It should be noted that when being already provided with out
When gas control valve 60, if being closed by the outlet end that leaving air control valve 60 can control flow controller, can not also additionally it set
Set check valve 72.In the present embodiment, when high precision flow 60, is connected directly between on exit passageway 13 by check valve 71.Though
It is not shown in right figure, those check valves page 71,72 can be connected with processor, be opened or closed by 40 controller of processor.
Any of the above-described embodiment provide high-precision air distributing device on the basis of, processor 40 can be used for by with sample gas
The flow controller of channel connection is denoted as first flow controller, and the flow controller being connected to spirit channel is denoted as second flow
Controller；And it is dense according to the practical distribution of the actual flow value of the first flow controller and second flow controller calculating
Angle value.In the specific implementation, practical distribution concentration value can be exported and shows, generally, practical distribution concentration value and pre- establishing
Gas concentration value is close.
More specifically, the actual flow that can be measured by the same high precision flow each flow controller
Value, calibrates the flow of flow control.If the high precision flow correction factor is denoted as k, high precision flow measurement
The sum of actual flow value of all first flow controllers out is F1, all seconds which measures
The sum of actual flow value of amount controller is F2；Then final practical distribution concentration value Cp=kF1*C0/(kF1+kF2)=F1*C0/
(F1+F2).As it can be seen that high precision flow correction factor is will not to have an impact to final practical distribution concentration value.
Due to the flow controller using multiple single processes, and the flow controller of multiple single processes has identical volume
Constant current journey, therefore can refer to that flow controller exists to avoid the linear measurement error of the high precision flow, linear measurement error
With different correction factors when measuring different flow.Due in the utility model, the flow controller of the single process of use
Specified process when it is identical, therefore, corresponding correction factor k is also identical.
On the basis of the high-precision air distributing device that any of the above-described embodiment provides, one embodiment of the utility model
In, it can also include display (not shown), be displayed for the calculated reality of processor with gas concentration；It can be with
For showing the first flow controller being selected, second flow controller.If processor also calculate it is practical with gas concentration with
The default deviation with gas concentration, then the deviation can also be shown by display.
High-precision distribution air distributing device provided by the embodiment of the utility model, it is easy to operate, using multiple single processes
Flow controller, and the flow controller of multiple single processes has same nominal process, passes through high-precision flow meter calibrating
The flow controller of each single process；It is dense to avoid the correction factor k of high precision flow being brought into final distribution
In the calculating of degree, due to the flow controller using same specified process, high precision flow can also be avoided to exist
Linearity error when measuring different processes is brought into the calculating with gas concentration, further reduces error.The utility model is logical
It crosses to the practical calculating for matching gas concentration, provides more accurately for user with gas concentration.
Above by reference to the preferred embodiment of Detailed description of the invention the utility model, it is practical new that those skilled in the art do not depart from this
The scope and spirit of type can realize the utility model there are many variant schemes.For example, as the part of one embodiment
The feature for showing or describing can be used for another embodiment to obtain another embodiment.It is preferably feasible that the above is only the utility model
Embodiment not thereby limits to the interest field of the utility model, all to use the utility model specification and accompanying drawing content
Made equivalence changes, are both contained within the interest field of the utility model.
Claims (6)
1. a kind of high-precision air distributing device, including sample gas channel, spirit channel, exit passageway, which is characterized in that the high-precision
Air distributing device includes:
The flow controller of multiple single processes has input end and outlet end, the flow controller of the multiple single process
With same nominal process；
Air intake control valve is connected with the input end of the flow controller, for control the flow controller whether with it is described
Sample gas channel is connected with one of them of spirit channel；
Processor is connected with the air intake control valve, for m flow controller to be connected with the sample feed channel, by n
Flow controller is connected with the spirit channel.
2. high-precision air distributing device according to claim 1, which is characterized in that the high-precision air distributing device includes gas control
Valve processed and the high precision flow being connected with the leaving air control valve, the leaving air control valve and the flow controller go out
Mouthful end and the exit passageway are connected, for control the flow controller whether with the high precision flow and the outlet
One of them of channel is connected.
3. high-precision air distributing device according to claim 1 or claim 2, which is characterized in that the high-precision air distributing device includes single
To valve, the outlet end of the flow controller is set.
4. high-precision air distributing device according to claim 1, which is characterized in that the processor with sample gas channel for that will connect
Logical flow controller is denoted as first flow controller, and the flow controller being connected to spirit channel is denoted as second flow control
Device；And it is calculated according to the actual flow value of the first flow controller and the second flow controller practical with gas concentration
Value.
5. high-precision air distributing device according to claim 4, which is characterized in that further include display, with the processor phase
Even, the display is for showing the practical distribution concentration value.
6. high-precision air distributing device according to claim 1, which is characterized in that the high-precision air distributing device includes storage
Device, for storing the flow of each flow controller via the reality recorded after the measurement of the same high precision flow
Flow value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2018210373295 | 2018-07-02 | ||
| CN201821037329 | 2018-07-02 |
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| CN209254647U true CN209254647U (en) | 2019-08-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673661A (en) * | 2018-07-02 | 2020-01-10 | 中国计量科学研究院 | High-precision gas distribution method and device |
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- 2018-07-20 CN CN201821154827.8U patent/CN209254647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673661A (en) * | 2018-07-02 | 2020-01-10 | 中国计量科学研究院 | High-precision gas distribution method and device |
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