CN104096276A - Carbon dioxide supplying device - Google Patents
Carbon dioxide supplying device Download PDFInfo
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- CN104096276A CN104096276A CN201410362722.1A CN201410362722A CN104096276A CN 104096276 A CN104096276 A CN 104096276A CN 201410362722 A CN201410362722 A CN 201410362722A CN 104096276 A CN104096276 A CN 104096276A
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- output
- pressure monitoring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Flow Control (AREA)
Abstract
The invention provides a carbon dioxide supplying device. The device comprises a gas supplying pipe, a control unit, a display unit, an input end pressure monitoring unit and an output end pressure monitoring unit; an input port, a pressure reduction valve, a solenoid valve, a proportional valve, a flow rate detection unit and an output port are sequentially arranged on and formed in the gas supplying pipe; the control unit is connected with the solenoid valve, the proportional valve, the flow rate detection unit, the display unit, the input end pressure monitoring unit and the output end pressure monitoring unit through signal lines; the input end pressure monitoring unit is connected with the input port through the signal line; the output end pressure monitoring unit and the output port are connected through the signal line. According to the carbon dioxide supplying device, the flow rate closed-loop control technology is carried out, the output flow rate of carbon dioxide is detected on real time, the PWM (Pulse-Width Modulation) control is performed for the proportional valve, and thus the stability of the output flow rate is kept, and meanwhile, the stable output of the flow can be ensured under the change of output resistance, and as a result, the safety in use is improved.
Description
Technical field
The invention belongs to technical field of medical instruments, specifically, particularly a kind of carbon dioxide air supply plant.
Background technology
Carbon dioxide air supply plant be a kind of during for endoscopic surgery up and down digestive tract send into a kind of medical apparatus and instruments of carbon dioxide.In the time of interior arthroscopic diagnosis, according to actual needs, send into the carbon dioxide of certain flow by scope, to dilute oxygen concentration and the combustable gas concentration in human body alimentary canal, the prevention spark that electric knife produces in the time of operation triggers the burning of fuel gas.
Day by day universal along with interior arthroscopic diagnosis, the application of carbon dioxide air supply plant has also obtained great development, at present, single-chip microcomputer is widely used in the complete machine control of carbon dioxide air supply plant, realize the complete monitoring to input pressure, output pressure, and select according to actual needs the output of different flow, realize the detection of various safety indexs simultaneously, and sequencing control and fault detect, instruction.Thereby greatly improved the safety and reliability of equipment self, simplify doctor's operating process.
In view of the feature of carbon dioxide air supply plant, require output flow stable, and there is input, output pressure monitoring, alarming and control.Prior art carbon dioxide air supply plant generally has input and output pressure monitoring, flow monitoring function, and can open or close carbon dioxide output according to the variation of input and output pressure.But there is following defect in this technology:
1, output flow is relevant with the size of output channel, selects heavy caliber output channel, and output flow increases, and selects small-bore output channel, and output flow reduces.
2, when actual operation, while causing air resistance to increase because of reasons such as output channel bendings, can cause output flow to reduce, cause doctor to be unable to estimate the actual gas gross of sending into patient, thereby bring safe hidden danger.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of carbon dioxide air supply plant, can keep the stable of carbon dioxide output flow, can ensure still can ensure in the time that output resistance changes the stable output of flow of carbon dioxide gas amount simultaneously.
Technical scheme of the present invention is as follows: a kind of carbon dioxide air supply plant, comprise snorkel, control unit, display unit, input pressure monitoring unit and output end pressure monitoring means, on described snorkel, be disposed with input interface, air relief valve, electromagnetic valve, proportioning valve, flow detection unit and output interface; Described control unit is connected with described electromagnetic valve, proportioning valve, flow detection unit, display unit, input pressure monitoring unit and output end pressure monitoring means respectively by holding wire; Between described input pressure monitoring unit and described input interface, be connected by holding wire, between described output end pressure monitoring means and described output interface, be connected by holding wire.
Described input pressure monitoring unit is for monitoring the input gas pressure value of input interface, control unit stores preset pressure value range, in the time that described input gas pressure value exceeds described preset pressure value range, control unit sends electromagnetic valve and described proportioning valve described in signal at stop.
The present flow rate value of the real-time detected gas of flow detection unit, and present flow rate value is sent into control unit, control unit stores preset flow value, and in the time that present flow rate value exceeds described preset flow value, control unit sends control signal to proportioning valve.
Described output end pressure monitoring means is for monitoring the output gas pressure value of output interface, and control unit stores pressure door limit value, and control unit compares backward comparative example valve by output gas pressure value and pressure door limit value and sends control signal.
Beneficial effect: carbon dioxide enters into air relief valve from input interface to carry out, voltage stabilizing, entering proportioning valve by electromagnetic valve, then exports and enter endoscope system by flow detection unit, output interface.Flow detection unit detects in real time to the flow of carbon dioxide, and detection data are sent into control unit, control unit compares according to the preset flow value of the present flow rate value detecting and user's setting, control unit sends control signal comparative example valve to proportioning valve to carry out PWM control impuls width modulated (PWM is the abbreviation of English " Pulse Width Modulation ", be called for short pulsewidth modulation, to utilize the numeral of microprocessor to export the very effective technology of the one that analog circuit is controlled, be widely used in from measuring, communication is in many fields of power control and conversion), in the time that the present flow rate value detecting is less than the preset flow value of user's setting, increase dutycycle, otherwise, reduce dutycycle, thereby the preset flow value that output flow and user are set is consistent.The present invention is based on flow Closed loop Control, by real-time detection carbon dioxide output flow, comparative example valve carries out PWM control, and then keeps the stable of output flow, can ensure still can ensure the stable output of flow in the time that output resistance changes, improved the safety using simultaneously.
Brief description of the drawings
Fig. 1 is structural principle schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, a kind of carbon dioxide air supply plant, comprise snorkel 1, control unit 2, display unit 3, input pressure monitoring unit 4 and output end pressure monitoring means 5, on snorkel 1, be disposed with input interface 6, air relief valve 7, electromagnetic valve 8, proportioning valve 9, flow detection unit 10 and output interface 11; Control unit 2 is connected with electromagnetic valve 8, proportioning valve 9, flow detection unit 10, display unit 3, input pressure monitoring unit 4 and output end pressure monitoring means 5 respectively by holding wire; Between input pressure monitoring unit 4 and input interface 6, be connected by holding wire, between output end pressure monitoring means 5 and output interface 11, be connected by holding wire.Air relief valve 7 can ensure that the source of the gas under different air pressure can be applied to this device reliably, improves compatibility and the reliability of system, and the model of air relief valve 7 can adopt the SR200L-08 of AirTAC company.8 on-off actions of electromagnetic valve, the also output of closing carbon dioxide gas completely in the time that proportioning valve 9 lost efficacy, the safety that improves system, the model of electromagnetic valve 8 can adopt the 3V1-06-DC24V of AirTAC company.The model of proportioning valve 9 can adopt 2824 of burkert company, and the model of flow detection unit 10 can adopt the AWM43600V of Honeywell company.
Input pressure monitoring unit 4 is for monitoring the input gas pressure value of input interface 6, and control unit 2 stores preset pressure value range, and in the time that input gas pressure value exceeds preset pressure value range, control unit 2 sends signal at stop electromagnetic valve 8 and proportioning valve 9.Preset pressure value range in the present embodiment is 0.1MPA～0.6MPA, alarm in the time inputting gas pressure value lower than 0.1MPA or higher than 0.6MPA, and control unit 2 sends signal at stop electromagnetic valve 8 and proportioning valve 9, and reminding user.Input pressure monitoring unit 4 can adopt the 40PC150G2A of Honeywell company.
The present flow rate value of flow detection unit 10 real-time detected gas, and present flow rate value is sent into control unit 2, control unit 2 stores preset flow value, preset flow value in the present embodiment is 1 liter/min, preset flow value can also be pre-seted according to practical situation by user, in the time that present flow rate value exceeds preset flow value, control unit 2 sends control signal to proportioning valve 9.
Output end pressure monitoring means 5 is for monitoring the output gas pressure value at output interface 11 places, and control unit 2 stores pressure door limit value, and control unit 2 compares backward proportioning valve 9 by output gas pressure value and pressure door limit value and sends control signal.In the time that output gas pressure value is increased to certain value P1, output flow is linear to be reduced, and in the time that output gas pressure value is further increased to P2, output flow is closed completely, is implemented as follows:
(1), in the time of nowPrs≤P1:
targetFlow＝setFlow；
(2), in the time of P1<nowPrs≤P2:
targetFlow＝setFlow*(P3-nowPrs)/(P3-P1)；
(3), in the time of nowPrs>P2:
targetFlow＝0；
Wherein, nowPrs represents current output pressure value, targetFlow represents output flow desired value, finally output to patient's flow value, setFlow is the flow value that user sets by panel, the pressure door limit value that P1, P2, P3 are default, there is following relation: P1<P2<P3, P1 value 30KPA in the present embodiment, P2 value 40KPA, P3 value 60KPA.Output end pressure monitoring means 5 can adopt the 40PC015G2A of Honeywell company.
Claims (4)
1. a carbon dioxide air supply plant, it is characterized in that: comprise snorkel, control unit, display unit, input pressure monitoring unit and output end pressure monitoring means, on described snorkel, be disposed with input interface, air relief valve, electromagnetic valve, proportioning valve, flow detection unit and output interface; Described control unit is connected with described electromagnetic valve, proportioning valve, flow detection unit, display unit, input pressure monitoring unit and output end pressure monitoring means respectively by holding wire; Between described input pressure monitoring unit and described input interface, be connected by holding wire, between described output end pressure monitoring means and described output interface, be connected by holding wire.
2. according to carbon dioxide air supply plant claimed in claim 1, it is characterized in that: described input pressure monitoring unit is for monitoring the input gas pressure value of input interface, control unit stores preset pressure value range, in the time that described input gas pressure value exceeds described preset pressure value range, control unit sends electromagnetic valve and described proportioning valve described in signal at stop.
3. according to carbon dioxide air supply plant claimed in claim 1, it is characterized in that: the present flow rate value of the real-time detected gas of flow detection unit, and present flow rate value is sent into control unit, control unit stores preset flow value, in the time that present flow rate value exceeds described preset flow value, control unit sends control signal to proportioning valve.
4. according to carbon dioxide air supply plant claimed in claim 1, it is characterized in that: described output end pressure monitoring means is for monitoring the output gas pressure value of output interface, control unit stores pressure door limit value, and control unit compares backward comparative example valve by output gas pressure value and pressure door limit value and sends control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410362722.1A CN104096276A (en) | 2014-07-28 | 2014-07-28 | Carbon dioxide supplying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410362722.1A CN104096276A (en) | 2014-07-28 | 2014-07-28 | Carbon dioxide supplying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104096276A true CN104096276A (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410362722.1A Pending CN104096276A (en) | 2014-07-28 | 2014-07-28 | Carbon dioxide supplying device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565492A (en) * | 2014-12-30 | 2015-04-29 | 河南西瑞医疗电子技术有限公司 | Precise flow control method of proportional valve |
| CN104545774A (en) * | 2015-01-30 | 2015-04-29 | 合肥德铭电子有限公司 | Integrated, mobile and minimally invasive electronic endoscope system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10151111A (en) * | 1996-11-25 | 1998-06-09 | Olympus Optical Co Ltd | Gas supply device |
| US20050217727A1 (en) * | 2004-03-29 | 2005-10-06 | Takefumi Uesugi | Apparatus for supplying gas at two different pressures |
| JP2006288754A (en) * | 2005-04-11 | 2006-10-26 | Olympus Medical Systems Corp | Electrosurgical instrument |
| CN103654689A (en) * | 2012-09-06 | 2014-03-26 | 富士胶片株式会社 | Gas-supply system |
| CN204133903U (en) * | 2014-07-28 | 2015-02-04 | 重庆金山科技（集团）有限公司 | Carbon dioxide air supply plant |
-
2014
- 2014-07-28 CN CN201410362722.1A patent/CN104096276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10151111A (en) * | 1996-11-25 | 1998-06-09 | Olympus Optical Co Ltd | Gas supply device |
| US20050217727A1 (en) * | 2004-03-29 | 2005-10-06 | Takefumi Uesugi | Apparatus for supplying gas at two different pressures |
| JP2006288754A (en) * | 2005-04-11 | 2006-10-26 | Olympus Medical Systems Corp | Electrosurgical instrument |
| CN103654689A (en) * | 2012-09-06 | 2014-03-26 | 富士胶片株式会社 | Gas-supply system |
| CN204133903U (en) * | 2014-07-28 | 2015-02-04 | 重庆金山科技（集团）有限公司 | Carbon dioxide air supply plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565492A (en) * | 2014-12-30 | 2015-04-29 | 河南西瑞医疗电子技术有限公司 | Precise flow control method of proportional valve |
| CN104545774A (en) * | 2015-01-30 | 2015-04-29 | 合肥德铭电子有限公司 | Integrated, mobile and minimally invasive electronic endoscope system |
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Application publication date: 20141015 |
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