CN203366146U - Gas concentration control system - Google Patents
Gas concentration control system Download PDFInfo
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- CN203366146U CN203366146U CN 201320412968 CN201320412968U CN203366146U CN 203366146 U CN203366146 U CN 203366146U CN 201320412968 CN201320412968 CN 201320412968 CN 201320412968 U CN201320412968 U CN 201320412968U CN 203366146 U CN203366146 U CN 203366146U
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Abstract
The utility model discloses a gas concentration control system. The system comprises a pipeline, an electromagnetic valve which is arranged on a pipeline, a sensor which is arranged in a confined space and is used for acquiring gas concentration information, a control circuit which is connected between the sensor and the electromagnetic valve, and is used for generating a drive signal according to the gas concentration information and using the drive signal to control the opening and the closing of the electromagnetic valve, and a gas source which is connected with the confined space through the pipeline and is used for transporting gas to the confined space under the condition that the electromagnetic valve is opened. According to the utility model, the problem that the concentration of oxygen in the confined space cannot be controlled in the prior art is solved, and the concentration of the gas in the confined space is controlled.
Description
Technical field
The utility model relates to the opertaing device field, in particular to a kind of gas concentration control system.
Background technology
The plains region personnel enter the plateau initial stage and need to enter the rest of meeting an urgent need of high oxygen concentration room, to reduce altitude sickness.Part plains region sportsman also need to be trained under the low oxygen concentration condition, improves locomitivity.Therefore need to be controlled the oxygen concentration in certain space, however the method that can not controlled oxygen concentration in confined space in prior art or device.
For the problem that can't be controlled the oxygen concentration in confined space in prior art, effective solution is not yet proposed at present.
The utility model content
The problem that can't be controlled the oxygen concentration in confined space for correlation technique, not yet propose effective solution at present, and for this reason, fundamental purpose of the present utility model is to provide a kind of gas concentration control system, to address the above problem.
To achieve these goals, according to an aspect of the present utility model, provide a kind of gas concentration control system, this system comprises: pipeline; Solenoid valve, be arranged on pipeline; Sensor, be arranged in confined space, for obtaining gas concentration information; Control circuit, be connected between sensor and solenoid valve, for according to the gas concentration Information generation, driving signal, and uses the switching that drives the signal controlling solenoid valve; Source of the gas, be communicated with confined space by pipeline, in the situation that solenoid valve is opened, to confined space, carries gas.
Further, control circuit comprises: the A/D conversion chip is connected with sensor, for gas concentration information is converted to digital signal; Control chip, be connected with the A/D conversion chip, for preset concentration value and current concentration value being made to difference operation, controlled signal; Driving circuit, be connected with control chip, and control signal is controlled driving circuit and sent the driving signal, and wherein, current concentration value is the gas concentration value corresponding with digital signal.
Further, control chip comprises: computing unit is connected with the A/D conversion chip, for preset concentration value and current concentration value are made to poor first difference that calculates; Processing unit, be connected with computing unit, in the situation that the first difference is greater than first threshold, generates the first control subsignal, in the situation that the first difference is not more than first threshold and is greater than Second Threshold, generates the second control subsignal.
Further, pipeline comprises the first sub-pipeline and the second sub-pipeline; Solenoid valve comprises: the first solenoid valve, be arranged on the first sub-pipeline, and with processing unit, be connected, for opening when receiving the first control subsignal, when receiving the second control subsignal, close; The second solenoid valve, be arranged on the second sub-pipeline, with processing unit, is connected, and for opening when receiving the second control subsignal, when receiving the first control subsignal, closes.
Further, the second solenoid valve is communicated with source of the gas and confined space by flow control device.
Further, gas concentration control system also comprises: input equipment is connected with control chip, for inputting the preset concentration value.
Further, input equipment is connected with control chip by interface circuit.
Further, gas concentration control system also comprises: current-to-voltage converting circuit, be connected between sensor and control circuit, and be converted to the gas concentration information of the voltage form of expression for the gas concentration information by the electric current form of expression.
Further, gas concentration control system also comprises: adjustable speed fan, and confined space is communicated with ambient atmosphere by adjustable speed fan, and adjustable speed fan is for being exchanged the gas in confined space and ambient atmosphere; And/or fan, be arranged in confined space, for the gas by confined space, mix.
Further, source of the gas comprises pure oxygen source of the gas and purity nitrogen source of the gas.
Pass through the utility model, adopt the utility model, by sensor is set in confined space, then the gas concentration Information generation got according to sensor by control circuit drives signal, use the switching that drives signal controlling to be arranged on the solenoid valve on pipeline, in the situation that solenoid valve is opened, carry the gas of source of the gas to confined space by pipeline, thereby solved the problem that can't be controlled the oxygen concentration in confined space in the prior art, realized controlling the effect of gas concentration in confined space.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model, for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the gas concentration control system of the utility model embodiment;
Fig. 2 is the structural representation according to gas concentration control system embodiment illustrated in fig. 1;
Fig. 3 is the structural representation according to control circuit embodiment illustrated in fig. 1; And
Fig. 4 is the logic control schematic diagram according to control circuit embodiment illustrated in fig. 1.
Embodiment
It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 is the structural representation according to the gas concentration control system of the utility model embodiment.As depicted in figs. 1 and 2, this system can comprise: pipeline 10; Solenoid valve 30, be arranged on pipeline 10; Sensor 50, be arranged in confined space, for obtaining gas concentration information; Control circuit 70, be connected between sensor and solenoid valve, for according to the gas concentration Information generation, driving signal, and uses the switching that drives the signal controlling solenoid valve; Source of the gas 90, be communicated with confined space by pipeline 10, in the situation that solenoid valve is opened, to confined space, carries gas.
Adopt the utility model, by sensor is set in confined space, then the gas concentration Information generation got according to sensor by control circuit drives signal, use the switching that drives signal controlling to be arranged on the solenoid valve on pipeline, in the situation that solenoid valve is opened, carry the gas of source of the gas by pipeline to confined space, thereby solved the problem that can't be controlled the oxygen concentration in confined space in the prior art, realized controlling the effect of gas concentration in confined space.
Wherein, sensor can be oxygen concentration sensor, the oxygen concentration information that the oxygen concentration information in the confined space that oxygen concentration sensor collects is the electric current form of expression.
According to above-described embodiment of the present utility model, control circuit 70 can comprise: A/D conversion chip 71 is connected with sensor 50, for gas concentration information is converted to digital signal; Control chip 73, be connected with A/D conversion chip 71, for preset concentration value and current concentration value being made to difference operation, controlled signal; Driving circuit 75, be connected with control chip 73, and control signal is controlled driving circuit and sent the driving signal, and wherein, current concentration value is the gas concentration value corresponding with digital signal.
Particularly, gas concentration control system can also comprise: current-to-voltage converting circuit 130, be connected between sensor and control circuit, and be converted to the gas concentration information of the voltage form of expression for the gas concentration information by the electric current form of expression.
More specifically, as shown in Figure 3, oxygen concentration sensor can be converted to the 4-20mA current signal by the oxygen concentration of confined space, the gas concentration information that the gas concentration information that sensor obtains is the electric current form of expression, sensor is converted to the 0-5V voltage signal after through Shielded Twisted Pair, the gas concentration information of the electric current form of expression being passed to current-to-voltage converting circuit, be the gas concentration information of the voltage form of expression, being converted to digital signal by A/D conversion chip 71 is gathered by control chip 73, control chip 73 obtains the current concentration value corresponding with digital signal, and preset concentration value and current concentration value are made to the controlled signal of difference operation, control chip 73 is used this control signal (can be Transistor-Transistor Logic level in the present embodiment) to control driving circuit 75 and sends the driving signal, to drive the break-make (being the switching of solenoid valve) of solenoid valve.
Wherein, the process that control chip 73 obtains the current concentration value corresponding with digital signal can realize by the level computing, can also directly obtain the concentration value of default corresponding digital signals, and using this concentration value as current concentration value.
According to above-described embodiment of the present utility model, control chip can comprise: computing unit is connected with A/D conversion chip 71, for preset concentration value and current concentration value are made to poor first difference that calculates; Processing unit, be connected with computing unit, in the situation that the first difference is greater than first threshold, generates the first control subsignal, in the situation that the first difference is less than first threshold and is greater than Second Threshold, generates the second control subsignal.
In above-described embodiment of the present utility model, pipeline can comprise the first sub-pipeline and the second sub-pipeline; Solenoid valve can comprise: the first solenoid valve 31, be arranged on the first sub-pipeline, and with processing unit, be connected, for opening when receiving the first control subsignal, when receiving the second control subsignal, close; The second solenoid valve 33, be arranged on the second sub-pipeline, with processing unit, is connected, and for opening when receiving the second control subsignal, when receiving the first control subsignal, closes.Wherein, the second solenoid valve is communicated with source of the gas and confined space by flow control device.Wherein, the first solenoid valve is large flow solenoid valve, and the second solenoid valve is the low-flow electromagnetic valve.Wherein, the first solenoid valve directly is communicated with source of the gas with confined space, and the second solenoid valve is communicated with source of the gas by flow control device with confined space.
Particularly, as shown in Figure 2, source of the gas 90 is connected in confined space 1 by the first sub-pipeline 11 and the second sub-pipeline 13.Article two, all arrange a solenoid valve on pipeline, also arrange a flow control device 35 on the second sub-pipeline.Wherein preferably, flow control device can be flow control valve.
In above-described embodiment of the present utility model, as shown in Figure 4, system adopts the negative feedback control principle, and first threshold and Second Threshold are by interpersonal interface setting, and preferably, first threshold is greater than Second Threshold.As shown in Figure 4, the preset concentration value of confined space oxygen concentration (being desired value) is done poor calculating with current concentration value (being actual value), obtain the first difference, judge whether the first difference is greater than first threshold, when the first difference is greater than first threshold, be that actual value and desired value deviation are when larger, processing unit generates first and controls subsignal, the first solenoid valve is opened, the second closed electromagnetic valve, now source of the gas enters rapidly confined space with larger flow velocity, and the oxygen concentration of confined space will approach desired value with larger speed.In the situation that the first difference is not more than first threshold, judge whether the first difference is greater than Second Threshold, when the first difference is not more than first threshold and is greater than Second Threshold, after the first difference reduces, processing unit generates second and controls subsignal, first closed electromagnetic valve the second solenoid valve is opened, and the flow that now source of the gas is set with flow control valve enters confined space, and the oxygen concentration of confined space will approach target with less speed.When the first difference is less than Second Threshold, two solenoid valves all cut out (i.e. the first closed electromagnetic valve, the second closed electromagnetic valve), and the oxygen concentration in confined space stops rising.Because the effect of personnel attrition and buncher, oxygen concentration in confined space will descend, therefore the oxygen concentration of confined space will fluctuate within the specific limits, and fluctuation range can be controlled in preset range by value, first threshold and the Second Threshold of suitable adjust flux variable valve.
In the above-described embodiments, adopt degenerative control, the control circuit cost is low, controls reliable.
In the above-described embodiments, control circuit when actual value and predetermined value deviation when larger large flow solenoid valve start pure oxygen or pure nitrogen gas and enter confined air chien shih space oxygen concentration and reach rapidly preset concentration, when the space oxygen concentration reaches the preset concentration value, large flow solenoid valve is closed, the low-flow electromagnetic valve is opened, when the concentration negative sense departs from the preset concentration value, the low-flow electromagnetic valve also cuts out, and stops carrying pure oxygen or pure nitrogen gas.
In above-described embodiment of the present utility model, gas concentration control system can also comprise: input equipment is connected with control chip, for inputting the preset concentration value.Wherein particularly, input equipment can be connected with control chip by interface circuit.
Particularly, as shown in Figure 3, the user can control the digital signal transfers of desired value (being the preset concentration value) to control chip 73 by the oxygen concentration of confined space by the input equipment (can be button in the present embodiment) of Man Machine Interface.
According to above-described embodiment of the present utility model, gas concentration control system can also comprise: adjustable speed fan 103, and confined space is communicated with ambient atmosphere by adjustable speed fan, and adjustable speed fan is for being exchanged the gas in confined space and ambient atmosphere; And/or fan 101, be arranged in confined space, for the gas by confined space, mix.
Particularly, can the gas in confined space 1 fully be mixed by fan 101 is set, to reduce the unevenness of oxygen concentration.
In the above-described embodiments, by the parameter of control circuit is set, the aimed oxygen concn range of control in room can be set, and confined space arranges an adjustable speed fan be communicated with ambient atmosphere.According to the difference of aimed oxygen concn, confined space arranges that source of the gas passes through outward.Owing to maintaining, the required pure oxygen of space oxygen concentration or pure nitrogen gas are relatively less, if there is no venting practice, in space, the harmful gas such as carbon dioxide and volatile organic matter will gather, the space air quality is descended, increased adjustable speed fan, can regulate the rotating speed of adjustable speed fan according to situations such as space size and personnel amount and exercise loads, reach the purpose of controlling air quality in space.
Particularly, source of the gas can comprise pure oxygen source of the gas and purity nitrogen source of the gas.
In above-described embodiment of the present utility model, adopt pure oxygen source of the gas and purity nitrogen source of the gas, because the gas cost of pure oxygen and purity nitrogen is lower, configuration easily, that desirable oxygen concentration is controlled raw material, can reduce the cost of this system, and can, by adjustable speed fan when using pure oxygen and purity nitrogen for the major control raw material, use the air in atmosphere to improve the surrounding air quality as carrier.
From above description, can find out, the utility model has been realized following technique effect: adopt the utility model, by sensor is set in confined space, then the gas concentration Information generation got according to sensor by control circuit drives signal, use the switching that drives signal controlling to be arranged on the solenoid valve on pipeline, in the situation that solenoid valve is opened, carry the gas of source of the gas to confined space by pipeline, thereby solved the problem that can't be controlled the oxygen concentration in confined space in the prior art, realized controlling the effect of gas concentration in confined space.
The claimed controller of the application and each assembly that forms this controller are all a kind of entity products that has definite shape, constructs and occupy certain space.For example, microprocessor, signal processor, sub-processor etc. are all can independent operating, computer equipment, terminal or server that have the particular hardware structure.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a gas concentration control system, is characterized in that, comprising:
Pipeline;
Solenoid valve, be arranged on described pipeline;
Sensor, be arranged in confined space, for obtaining gas concentration information;
Control circuit, be connected between described sensor and described solenoid valve, for according to described gas concentration Information generation, driving signal, and uses the switching of the described solenoid valve of described driving signal controlling;
Source of the gas, be communicated with described confined space by described pipeline, in the situation that described solenoid valve is opened, to described confined space, carries gas.
2. gas concentration control system according to claim 1, is characterized in that, described control circuit comprises:
The A/D conversion chip, be connected with described sensor, for described gas concentration information is converted to digital signal;
Control chip, be connected with described A/D conversion chip, for preset concentration value and current concentration value being made to difference operation, controlled signal;
Driving circuit, be connected with described control chip, and described control signal is controlled described driving circuit and sent described driving signal,
Wherein, described current concentration value is the gas concentration value corresponding with described digital signal.
3. gas concentration control system according to claim 2, is characterized in that, described control chip comprises:
Computing unit, be connected with described A/D conversion chip, for described preset concentration value and described current concentration value are made to poor first difference that calculates;
Processing unit, be connected with described computing unit, in the situation that described the first difference is greater than first threshold, generate the first control subsignal, in the situation that described the first difference is not more than described first threshold and is greater than Second Threshold, generate the second control subsignal.
4. gas concentration control system according to claim 3, is characterized in that,
Described pipeline comprises the first sub-pipeline and the second sub-pipeline;
Described solenoid valve comprises:
The first solenoid valve, be arranged on the described first sub-pipeline, with described processing unit, is connected, and for opening when receiving described the first control subsignal, when receiving described the second control subsignal, closes;
The second solenoid valve, be arranged on the described second sub-pipeline, with described processing unit, is connected, and for opening when receiving described the second control subsignal, when receiving described the first control subsignal, closes.
5. gas concentration control system according to claim 4, is characterized in that, described the second solenoid valve is communicated with described source of the gas and described confined space by flow control device.
6. gas concentration control system according to claim 2, is characterized in that, described gas concentration control system also comprises:
Input equipment, be connected with described control chip, for inputting described preset concentration value.
7. gas concentration control system according to claim 6, is characterized in that, described input equipment is connected with described control chip by interface circuit.
8. gas concentration control system according to claim 1, is characterized in that, described gas concentration control system also comprises:
Current-to-voltage converting circuit, be connected between described sensor and described control circuit, is converted to the described gas concentration information of the voltage form of expression for the described gas concentration information by the electric current form of expression.
9. gas concentration control system according to claim 1, is characterized in that, described gas concentration control system also comprises:
Adjustable speed fan, described confined space is communicated with ambient atmosphere by described adjustable speed fan, and described adjustable speed fan is for being exchanged the gas in described confined space and described ambient atmosphere; And/or
Fan, be arranged in described confined space, for the gas by described confined space, mixes.
10. gas concentration control system according to claim 1, is characterized in that, described source of the gas comprises pure oxygen source of the gas and purity nitrogen source of the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412968 CN203366146U (en) | 2013-07-11 | 2013-07-11 | Gas concentration control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412968 CN203366146U (en) | 2013-07-11 | 2013-07-11 | Gas concentration control system |
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| Publication Number | Publication Date |
|---|---|
| CN203366146U true CN203366146U (en) | 2013-12-25 |
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| CN 201320412968 Expired - Fee Related CN203366146U (en) | 2013-07-11 | 2013-07-11 | Gas concentration control system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760929A (en) * | 2013-12-31 | 2014-04-30 | 北京七星华创电子股份有限公司 | Method and device for controlling oxygen content in silicon wafer bearing area of semiconductor device |
| CN107298367A (en) * | 2017-08-23 | 2017-10-27 | 湖州南浔电梯配件配送中心有限公司 | A kind of lift car with oxygen system |
| CN107311018A (en) * | 2017-08-29 | 2017-11-03 | 湖州力奥电梯配件有限公司 | A kind of Multifunctional elevator car |
| CN107352344A (en) * | 2017-08-23 | 2017-11-17 | 湖州南浔电梯配件配送中心有限公司 | A kind of oxygen system of elevator |
| CN113101821A (en) * | 2021-05-18 | 2021-07-13 | 合肥恒诚智能技术有限公司 | Intelligent low-oxygen generating device for training |
| CN113981466A (en) * | 2021-09-14 | 2022-01-28 | 广东卡沃罗氢科技有限公司 | Closed space hydrogen concentration monitoring and automatic adjusting method, device and system |
-
2013
- 2013-07-11 CN CN 201320412968 patent/CN203366146U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760929A (en) * | 2013-12-31 | 2014-04-30 | 北京七星华创电子股份有限公司 | Method and device for controlling oxygen content in silicon wafer bearing area of semiconductor device |
| CN103760929B (en) * | 2013-12-31 | 2017-08-22 | 北京七星华创电子股份有限公司 | A kind of silicon chip bearing area Control for Oxygen Content method of semiconductor equipment |
| CN107298367A (en) * | 2017-08-23 | 2017-10-27 | 湖州南浔电梯配件配送中心有限公司 | A kind of lift car with oxygen system |
| CN107352344A (en) * | 2017-08-23 | 2017-11-17 | 湖州南浔电梯配件配送中心有限公司 | A kind of oxygen system of elevator |
| CN107311018A (en) * | 2017-08-29 | 2017-11-03 | 湖州力奥电梯配件有限公司 | A kind of Multifunctional elevator car |
| CN113101821A (en) * | 2021-05-18 | 2021-07-13 | 合肥恒诚智能技术有限公司 | Intelligent low-oxygen generating device for training |
| CN113981466A (en) * | 2021-09-14 | 2022-01-28 | 广东卡沃罗氢科技有限公司 | Closed space hydrogen concentration monitoring and automatic adjusting method, device and system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20140711 |
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| EXPY | Termination of patent right or utility model |