CN205307528U - Breathing machine gas circuit and breathing machine that contains this gas circuit - Google Patents
Breathing machine gas circuit and breathing machine that contains this gas circuit Download PDFInfo
- Publication number
- CN205307528U CN205307528U CN201521037748.5U CN201521037748U CN205307528U CN 205307528 U CN205307528 U CN 205307528U CN 201521037748 U CN201521037748 U CN 201521037748U CN 205307528 U CN205307528 U CN 205307528U
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- China
- Prior art keywords
- oxygen
- air
- regulating part
- pressure regulating
- gas circuit
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Abstract
The utility model discloses a breathing machine gas circuit and breathing machine that contains this gas circuit, breathing machine gas piping include oxygen branch road and air branch road, a serial communication port, oxygen branch road and air prop up and set up oxygen pressure regulating part and air pressure regulation spare on the road respectively, oxygen pressure regulating part and oxygen source connect, air pressure regulation spare and air source are connected, oxygen pressure regulating part and oxygen proportional valve are connected, air pressure regulation spare and air proportional valve are connected. The utility model discloses a gas circuit configuration can be accurate two respective flows of branch road of control, can solve when certain branch road flow is very little, the problem that can not accurately adjust is adjusted to the oxygen concentration.
Description
Technical field
This utility model belongs to respirator engineering field, is specifically related to the gas circuit of a kind of respirator and the respirator containing this gas circuit.
Background technology
The non-turbine respirator gas circuit that current ICU uses, mainly includes following several gas circuit:
1, oxygen and air enter respirator, each through air relief valve, form stable pressure source, then through peroxide road and AIR Proportional valve regulation suction end flow pressure etc. In this kind of gas circuit, mixed oxygen is after two proportioning valves;
2, oxygen and air enter respirator, each through air relief valve, form a stable pressure source, and oxygen road and air can be mixed by air relief valve simultaneously, the gas mixed, and through a proportioning valve, regulate suction end flow pressure etc.;
3, after oxygen and air enter respirator, carry out reducing pressure and mixed oxygen respectively through each branch road example valve, regulate pressure and the flow of suction end then through a proportioning valve. This design can regulate the pressure before suction end before proportioning valve, it is possible to carries out good precision and Flow-rate adjustment.
It is little mostly to there is range of flow in present most of respirator, and the working range that is suitable at the defect that bound operating point precision is not high, the generation of this defect and valve has very big relation, and the operation interval how widening valve has become as the research emphasis of this area.
For the second pre-mixing oxygen system, owing to mixed oxygen process is very sensitive to pressure, and mixed oxide structure is high to requirement on machining accuracy, even if this mechanism of Use of respirator also still suffers from the mixed coarse problem of oxygen.
The respirator of pressure can be regulated for the 3rd kind of gas circuit mode, in oxygen concentration and air concentration change minimum in, such as 22%, still suffer from regulating inaccurate problem or to controlling and valve performance requirement is high; For oxygen concentration in most high oxygen concentration (source of oxygen concentration), it also it is same problem. Producing have a bypass flow meter little in two branch roads that have its source in of the problems referred to above, valve cannot accurately control.
Utility model content
For the problem overcoming above-mentioned gas concentration accurately to control, this utility model provides the gas circuit of a kind of respirator and the respirator containing this respirator gas circuit, respirator of the present utility model can realize the accurate regulation and control of gas flow in gas circuit, and realizes the regulating flow quantity ratio of single pressure lower valve.
The respirator gas piping that this utility model provides includes oxygen branch road and air passage, it is respectively provided with oxygen pressure regulating part and air pressure regulating part, described oxygen pressure regulating part and oxygen source connect, described air pressure regulating part and air source connect, described oxygen pressure regulating part and oxygen proportion valve connect, and described air pressure regulating part and AIR Proportional valve connect.
Preferably, described air pressure regulating part range of regulation 0.005-0.2MPa.
Preferably, described oxygen pressure regulating part is AIR Proportional pressure regulator valve, and described air pressure regulating part is AIR Proportional pressure regulator valve. This utility model additionally provides the respirator containing above-mentioned gas pipeline.
This utility model passes through such a way control accuracy:
For proportional flow control valve, it is that Throttle Principle is to control flow now mostly. Before and after throttle-flow and valve, the relation of pressure reduction is (according to pressing estimation):Therefore, same valve, when front and back pressure reduction changes time, it is possible to provide different flows.
Air passage or oxygen branch road are through proportional pressure-reducing valve time, it is possible to regulate the pressure after air relief valve, are readily available now the proportional pressure-reducing valve regulating pressure at 0.005～0.2MPa on the market. When forefront pressure is fixing, valve has a minimum turn-on flow rate meeting certain precision, but when forefront pressure changes at 0.005～0.2MPa pressure time, theoretically, valve minimum discharge just hasChange, say, that theoretical degree of regulation can promote 5 times more than. The pressure limit that this flow proportional regulates rear end with proportional pressure-reducing valve has direct relation. Certainly owing to pressure is different, the correction factor of valve is different, and in details, this can be varied from, but general increase remains considerable.
This utility model realizes the control for precision by many valve arrangements. In the use procedure of respirator, different patients generally requires different tidal volumes, is all the total value only considering a tidal volume in the past, if but the oxygen concentration of air passage and oxygen branch road is different, and the flow in two branch roads has a long way to go. This is also that many times oxygen concentration regulates inaccurate, the root that oxygen concentration 22% even cannot regulate. Many valve arrangements of the present utility model can independently control the pressure in two branch roads. If needing oxygen flow only small and tidal volume being very big, then can raise air passage ratio upstream pressure, reduce oxygen branch road ratio upstream pressure. Thus can accomplish that two bypass flow all accurately control.
This utility model adopts four unique valve arrangements, solves current respirator gas circuit Problems existing, widen valve working interval, have higher use value root. Four valve arrangements are to combine above two branch road Independent fluxes and below pressure regulating system. Two branch roads are respectively configured proportional pressure-reducing valve and proportioning valve. The pressure that oneself flow of each branch road is suitable can be regulated, it is ensured that the flow of two branch roads and pressure are all very accurate before the proportioning valve of two such branch road.
For high accuracy valve, its price is high. Using above four valve arrangement gas circuit, although valve quantity increases to some extent, but can reduce the requirement to valve performance, this is also the advantage reducing technical threshold.
This four valve arrangements, it is possible to constitute double; two branch road respirator gas circuit and use, it is also possible to as but the gas circuit of the mixed oxygen front end of branch road respirator use, use flexibly.
The configuration of this gas circuit can so that flow adjustment range be widened significantly, it is possible to achieve the output of adult's necessary flow and child's necessary flow, has broken the restriction of single pressure lower valve regulating flow quantity ratio.
Gas circuit of the present utility model configuration can be accurately controlled two respective flows of branch road, it is possible to solves when certain bypass flow is only small time, and oxygen concentration regulates the problem that can not accurately regulate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of respirator gas piping of the present utility model.
Detailed description of the invention
With accompanying drawing, this utility model being made an explanation as follows, it is used only as and illustrates rather than restriction to of the present utility model in conjunction with the embodiments.
Referring to Fig. 1, the respirator gas piping that this utility model provides includes oxygen branch road and air passage, it is respectively provided with oxygen pressure regulating part and air pressure regulating part, described oxygen pressure regulating part and oxygen source connect, described air pressure regulating part and air source connect, described oxygen pressure regulating part and oxygen proportion valve connect, and described air pressure regulating part and AIR Proportional valve connect.
Described oxygen pressure regulating part is oxygen proportion pressure regulator valve, and described air pressure regulating part is AIR Proportional pressure regulator valve; It can also select other the parts that can regulate pressure as required.
Above-mentioned pressure regulator valve can select the pressure regulator valve of 0.005～0.2MPa scope as required, it is also possible to selects the valve of other range of regulation as required, by this scheme can realize flow only small time, the accurate adjustment that oxygen concentration regulates.
Claims (4)
1. a respirator gas piping, including oxygen branch road and air passage, it is characterized in that, described oxygen branch road and air passage are respectively provided with oxygen pressure regulating part and air pressure regulating part, described oxygen pressure regulating part and oxygen source connect, described air pressure regulating part and air source connect, and described oxygen pressure regulating part and oxygen proportion valve connect, and described air pressure regulating part and AIR Proportional valve connect.
2. gas piping according to claim 1, it is characterised in that described air pressure regulating part range of regulation 0.005-0.2MPa.
3. according to the arbitrary described gas piping of claim 1-2, it is characterised in that described oxygen pressure regulating part is oxygen proportion pressure regulator valve, and described air pressure regulating part is AIR Proportional pressure regulator valve.
4. a respirator, it is characterised in that described respirator contains the arbitrary described gas piping of claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521037748.5U CN205307528U (en) | 2015-12-14 | 2015-12-14 | Breathing machine gas circuit and breathing machine that contains this gas circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521037748.5U CN205307528U (en) | 2015-12-14 | 2015-12-14 | Breathing machine gas circuit and breathing machine that contains this gas circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205307528U true CN205307528U (en) | 2016-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521037748.5U Expired - Fee Related CN205307528U (en) | 2015-12-14 | 2015-12-14 | Breathing machine gas circuit and breathing machine that contains this gas circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205307528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652636A (en) * | 2019-09-18 | 2020-01-07 | 深圳市诺然美泰科技股份有限公司 | Oxygen regulating and controlling device for breathing machine |
-
2015
- 2015-12-14 CN CN201521037748.5U patent/CN205307528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652636A (en) * | 2019-09-18 | 2020-01-07 | 深圳市诺然美泰科技股份有限公司 | Oxygen regulating and controlling device for breathing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20181214 |