CN209451086U - It is a kind of with stablize tidal volume output ventilator gas circuit unit - Google Patents
It is a kind of with stablize tidal volume output ventilator gas circuit unit Download PDFInfo
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- CN209451086U CN209451086U CN201821656859.8U CN201821656859U CN209451086U CN 209451086 U CN209451086 U CN 209451086U CN 201821656859 U CN201821656859 U CN 201821656859U CN 209451086 U CN209451086 U CN 209451086U
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- venturi
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- mixing tank
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Abstract
The utility model relates to a kind of with the ventilator gas circuit unit for stablizing tidal volume output, check valve is loaded on the venturi air entry of empty oxygen mixing tank, when needing amount of oxygen very big, oxygen leakage cannot be gone out, and when needing low tidal volumes, the oxygen that oxygen regulating device (such as needle-valve) comes is less, but a large amount of air can be drawn onto from venturi air entry, pass through the effect of oxygen regulating device, it can play the role of controlling the hollow oxygen mixing ratio of empty oxygen mixing tank in entire breathing circuit, while can also play and adjust oxygen concentration；Venturi air entry and venturi compensation air entry are offered on venturi, when encounter patient breathing system resistance it is bigger than normal when, since the aperture of air entry on venturi and compensation air entry is not that too greatly, the tidal volume of setting can be conveyed to patient with meeting the requirements, without hypoventilation；Flow of oxygen is saved, the needs for the treatment of are met.
Description
Technical field
The utility model belongs to medical instruments field, in particular to a kind of with the ventilator gas circuit for stablizing tidal volume output
Unit.
Background technique: literary mound is much used in its gas circuit on medical instrument ventilator (especially first-aid respirator) at present
In device, and used venturi is that several air entries are provided at the nozzle of venturi mostly, when high pressure oxygen is from Wen Qiu
In high pressure oxygen import when inputting, project high speed oxygen stream through nozzle, form negative pressure in negative pressure cavity, it is big from the sucking of these air entries
Air is measured, is mixed with high speed oxygen stream, is transported to tracheae through venturi gas vent, then transtracheal is defeated by patient, it in this way can be with
The oxygen concentration of output gas is reduced, while tidal volume can also be improved, but if encountering Resistance of the respiratory system (refers generally to airway resistance
And compliance) patient (and the patient's such case rescued is more) bigger than normal, ventilator can only be to be far below the tide of setting value
Tolerance is conveyed to patient (for example set tidal volume as 500ml, and can only effectively be transported to the gas of 300ml or so to patient),
Hypoventilation is formed, oxygen closes failure.
Also for some using an air entry is only opened at Venturi nozzle, installing an oxygen concentration regulating valve on it (should
Regulating valve can be adjustable the area of oxygen and air inlet, when increasing oxygen air inlet open area, to just reduce air inlet
Mouthful area, play and completely close air inlet, conversely), the oxygen concentration of input is adjusted, when high pressure oxygen is from Wen Qiu
In high pressure oxygen import input when, through nozzle project high speed oxygen stream, negative pressure cavity formed negative pressure, from air entry suck it is dense through oxygen
Degree adjusts the gas of valve regulation, is mixed in venturi mixing chamber, after tracheae is output to by venturi gas outlet, then pass through
Tracheae is defeated by patient.To the gas of the output of entire venturi gas outlet, the size of air entry plays crucial effect, inhales
Port is bigger than normal, then can more effectively reduce minimum oxygen concentration, while the tidal volume exported is also able to satisfy requirement, but exhales encountering
Desorption system resistance patient bigger than normal, ventilator can only be input in patient's lung with the tidal volume far below setting value, equally understand shape
At hypoventilation, oxygen is caused to close failure；And air entry is less than normal, rescue when, when needing big tidal volume, just have power not from
The heart does not reach requirement；Simultaneously, it is desirable that the minimum oxygen concentration that ventilator reaches is possible will be higher, can not meet corresponding hypoxemia
Concentration requirement；Due to influencing output gas factor more (outlet of nozzle and the positional relationship of air entry, the size of nozzle, suction
The size etc. of port), the size of air entry is difficult have a proper value, thus, the ventilator of this principle is much used,
It often attends to one thing and lose sight of another, above two situation cannot be met simultaneously.
The enterprise of production ventilator also is realized using the height cost device such as high-precision proportioning valve and compressed air unit
Accurate control, though being able to satisfy requirement, its cost can sharp rise, to lose the market competitiveness, lose more than gain.
Summary of the invention
For disadvantages described above, the utility model mainly to the flow control in tracheae more precisely, output tidal volume it is steady
It is fixed, when patient occur Resistance of the respiratory system it is bigger than normal when, be able to satisfy sets requirement and gas be input in Patients with Lung；And works as and want
When asking the case where exporting big tidal volume, biggish tidal volume is exported with being also able to satisfy requirement, while being also able to satisfy minimum oxygen concentration
Requirement.
To achieve the above objectives, the utility model use following technical scheme: it is a kind of with stablize tidal volume output
Ventilator gas circuit unit, including needle-valve, empty oxygen mixing tank, venturi, the needle-valve are equipped with needle-valve oxygen inlet, needle-valve oxygen
Outlet, empty oxygen mixing tank are equipped with empty oxygen mixing tank oxygen inlet, empty oxygen mixing tank air intlet, empty oxygen mixing tank gas and go out
Mouthful, the needle-valve oxygen outlet is connected with empty oxygen mixing tank oxygen inlet；Be equipped in the venturi venturi hyperbaric oxygen into
Port, Venturi nozzle, venturi air entry, venturi negative pressure cavity, venturi mixing chamber, venturi gas outlet, the text mound
In air entry be connected with empty oxygen mixing tank gas vent, venturi compensation air entry, text are additionally provided on the venturi tube wall
It is compensated in mound on air entry and check valve is installed.
Venturi described in the utility model is square-tube-shaped；Air entry is set on the one side of venturi tube wall in the mound,
Venturi compensates on the either side in the other three face that air entry is set to venturi tube wall, venturi air entry and venturi compensation
Air entry is circular hole, and the centerline of the venturi air entry and venturi compensation air entry is hung down on same section
Directly in airintake direction；The center line and Venturi nozzle gas outlet top of the venturi air entry and venturi compensation air entry
The distance in face is 3~4mm；The aperture of the venturi compensation air entry is 1.5~φ of φ 3mm, the aperture of venturi air entry
For φ 3.5~φ 4.5mm, Venturi nozzle gas outlet aperture is 0.7~φ of φ 0.9mm；The venturi air entry and empty oxygen
Check valve is installed at mixing tank air intlet.
After the above technical solution is adopted, the utility model loads onto check valve on the venturi air entry of empty oxygen mixing tank,
When needing amount of oxygen very big, when oxygen leakage cannot be gone out, and needing low tidal volumes, oxygen regulating device (such as needle-valve)
The oxygen to come over is less, a large amount of air can be but drawn onto from venturi air entry, by the effect of oxygen regulating device, whole
It can play the role of controlling the hollow oxygen mixing ratio of empty oxygen mixing tank in a breathing circuit, while can also play and adjust oxygen concentration；
Offered on venturi venturi air entry and venturi compensation air entry, when encounter patient breathing system resistance it is bigger than normal when,
Since the aperture of air entry on venturi and compensation air entry is not that too greatly, can convey the tidal volume of setting with meeting the requirements
To patient, without hypoventilation；In addition, after loading onto check valve on venturi compensation air entry, when encountering low tide gas
When measuring high oxygen concentration, is not in that the oxygen of venturi is escaped from this air entry, saves flow of oxygen, meet the need for the treatment of
It wants；The utility model compensates air entry due to being equipped with venturi air entry and venturi, can be adjusted fill by oxygen if necessary
It sets and (closes oxygen inlet
), it can be air by the gas entered in two air entries, minimum oxygen concentration can be made to be declined, met the requirements；?
When needing big tidal volume gas when treatment, and certain air can be supplemented from the venturi compensation air entry equipped with check valve,
Meets the needs of exporting big tidal volume.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
According to Fig. 1, the utility model is a kind of with the ventilator gas circuit unit for stablizing tidal volume output, including needle-valve
1, empty oxygen mixing tank 4, venturi 8, the needle-valve 1 are equipped with needle-valve oxygen inlet 2, needle-valve oxygen outlet 3, empty oxygen mixing tank 4
It is equipped with empty oxygen mixing tank oxygen inlet 5, empty oxygen mixing tank air intlet 6, empty oxygen mixing tank gas vent 7, the needle-valve oxygen
Gas outlet 3 is connected with empty oxygen mixing tank oxygen inlet 5；Venturi hyperbaric oxygen air inlet 9, Wen Qiu are equipped in the venturi 8
In nozzle 10, venturi air entry 11, venturi negative pressure cavity 13, venturi mixing chamber 14, venturi gas outlet 15, it is described text mound
In air entry 11 be connected with empty oxygen mixing tank gas vent 7, venturi compensation air entry is additionally provided on 8 tube wall of venturi
12, venturi compensates and is equipped with check valve on air entry 12.
Venturi 8 described in the utility model is square-tube-shaped；Air entry 11 is set to the one side of 8 tube wall of venturi in the mound
On, venturi compensates on the either side in the other three face that air entry 12 is set to 8 tube wall of venturi, venturi air entry 11 and text
It is circular hole that air entry 12 is compensated in mound, and the venturi air entry 11 and venturi compensate the centerline of air entry 12 in same
On one section, and perpendicular to airintake direction, on a side by the setting of venturi air entry 11, venturi compensates air entry 12
It is arranged on the either side in the other three face, if two faces adjacent with venturi air entry 11, their center line are
It intersects vertically, when compensating on the side of the setting of air entry 12 over there, their center line is on the same line；The text
In mound air entry 11 and venturi compensation air entry 12 center line with 10 gas outlet top end face of Venturi nozzle at a distance from be 3~
4mm；The aperture of venturi compensation air entry 12 is 1.5~φ of φ 3mm, the aperture of venturi air entry 11 be φ 3.5~
φ 4.5mm, 10 gas outlet aperture of Venturi nozzle are 0.7~φ of φ 0.9mm；The venturi air entry 11 and empty oxygen mixing tank
Check valve is installed at air intlet 6.
Specific embodiment of the present utility model: the oxygen come out from hyperbaric oxygen gas source first passes around pressure reducing valve, then again
It is divided into two-way, passes through control valve (generally solenoid valve) respectively, wherein is all the way main gas circuit, eventually by venturi high pressure oxygen
Import 9 is mounted in venturi valve body 16 into Venturi nozzle 10(Venturi nozzle 10), another way is auxiliary air passage, is led to
Needle-valve oxygen inlet 2 is crossed, adjusts oxygen air inflow by needle-valve 1, tracheae is passed through by needle-valve oxygen outlet 3, then mixed by empty oxygen
Mould assembling oxygen inlet 5 enters empty oxygen mixing tank 4；Pass through such as needle-valve 1(or other oxygen regulating devices) it is adjustable into empty oxygen
Amount of oxygen in mixing tank 4, thus, the air capacity entered from empty oxygen mixing tank air intlet 6 can be indirectly controlled, so that it is determined that empty
Oxygen mixed proportion；High speed oxygen stream is projected through Venturi nozzle 10 into the high pressure oxygen of venturi high pressure oxygen import 9,
Negative pressure is formed in venturi negative pressure cavity 13, air entry 12 is compensated by venturi air entry 11 and venturi, sucks empty oxygen respectively
Empty oxygen gas mixture and air in mixing tank 4, are mixed again in venturi mixing chamber 14, pass through venturi gas outlet
15, mixed gas is conveyed to patient.
Venturi nozzle 10 is directly installed in venturi valve body 16 by the utility model, from venturi high pressure oxygen import
High pressure oxygen is input to venturi valve body 16 by 9, pros' (criticizing top and positive side) in 10 position of Venturi nozzle
Venturi air entry 11 and venturi compensation air entry 12 are offered, two faces of venturi are located at, on one of face
Venturi compensation air entry 12 it is smaller, pore size control is equipped with check valve between 1.5~3mm of φ on it, another face
On venturi air entry 11 it is larger, pore size control between 3.5~4.5mm of φ, two air entry center lines in same section, and
This section will be controlled, otherwise can perpendicular to airintake direction, the vertical range in this section and 10 gas outlet top of Venturi nozzle
It is inaccurate to there is tidal volume, 10 gas outlet aperture of Venturi nozzle is 0.7~φ of φ 0.9mm；Air-breathing is compensated in lesser venturi
Check valve is installed on mouth 12, air can only be allowed to enter in the negative pressure cavity 13 of venturi, and cannot be by the gas in negative pressure cavity 13
It is leaked from this air entry.And what is be connected with biggish venturi air entry 11 is sky oxygen mixing tank 4, is had in empty oxygen mixing tank 4
Three holes, respectively empty oxygen mixing tank oxygen inlet 5, empty oxygen mixing tank air intlet 6, empty oxygen mixing tank gas vent 7, wherein
The smallest sky oxygen mixing tank oxygen inlet 5 is connect with oxygen regulating device (such as needle-valve 1), and oxygen regulating device and source of oxygen
Connection can control the amount into empty 4 oxygen of oxygen mixing tank by adjusting；Maximum sky oxygen mixing tank air intlet 6 and atmosphere
It communicates, it is outside upper that check valve is equally installed, air can only be allowed to enter in sky oxygen mixing tank 4, and cannot be by empty oxygen mixing tank 4
Interior gas is overflowed from empty oxygen mixing tank air intlet 6；Another sky oxygen mixing tank gas vent 7 and 11 phase of venturi air entry
Even, the gas that empty oxygen mixing tank 4 is mixed passes through empty oxygen mixing tank gas vent 7 into venturi negative pressure cavity 13, is formed high
Fast air-flow forms negative pressure in venturi negative pressure cavity 13, and venturi air entry 11 and gas and venturi are compensated air-breathing respectively
The gas of mouth 12 sucks venturi negative pressure cavity 13, and the high-speed flow come out by Venturi nozzle 10 into the venturi of being brought and mixed
It closes chamber 14 to be mixed, is conveyed to patient through venturi gas outlet 15.Such structure snd size can guarantee output tide well
The stabilization of tolerance, while in certain degree, certain adjustment effect can also be played to oxygen concentration, make it to meet the requirements.
When requiring is Low tidal volume and high oxygen concentration, venturi negative pressure cavity 13 will will appear certain positive pressure, and venturi compensates air-breathing
Check valve on mouth 12 can prevent gas from overflowing from this mouthful；When occur patient breathing system resistance it is bigger than normal when, not due to aperture
It is very greatly, to be able to achieve enough ventilations；And when the big tidal volume of demand, and air entry 12 can be compensated from venturi and supplement air, increase
Add tidal volume；When needing to reach minimum oxygen concentration, the amount of oxygen of entrance can be turned down with needle-valve 1, be even switched off, completely by sky
Oxygen mixing tank air intlet 6 can also compensate air entry 12 from venturi and mend come gas flow needed for guaranteeing venturi air entry 11
Air is filled, oxygen concentration is reduced, meets the requirements.
After the oxygen flow for entering venturi high pressure oxygen import 9 determines, formed in venturi negative pressure cavity 13
Negative pressure is also just fixed, and the gas flow sucked by venturi air entry 11 is also just fixed, at this moment by oxygen regulating device (such as
Needle-valve 1), the adjustable amount for entering oxygen in empty oxygen mixing tank 4, when the amount of oxygen is less than the gas that venturi air entry 11 sucks
When the scale of construction, it will be supplemented from the air in the empty oxygen mixing tank air intlet 6 of empty oxygen mixing tank 4, when oxygen regulating device
It, will be all from the empty 6 inspiration air of oxygen mixing tank air intlet of empty oxygen mixing tank 4 when the input quantity of oxygen is adjusted to zero；When
When the amount of oxygen is greater than the gas flow that venturi air entry 11 sucks, even if venturi air entry 11 sucks a certain amount of gas,
At this moment it also will form positive pressure in air blender 4, it is single due to being equipped at the empty oxygen mixing tank air intlet 6 of air blender 4
To valve, at this point, the oxygen in empty oxygen mixing tank 4 will not be leaked into air by this import, and from venturi air entry 11 into
What it is into venturi negative pressure cavity 13 is just entirely oxygen.Thus, can also adjustment effect be played to overall oxygen concentration.
Claims (5)
1. a kind of with the ventilator gas circuit unit for stablizing tidal volume output, including needle-valve (1), empty oxygen mixing tank (4), venturi
(8), the needle-valve (1) is equipped with needle-valve oxygen inlet (2), needle-valve oxygen outlet (3), and empty oxygen mixing tank (4) is equipped with empty oxygen
Mixing tank oxygen inlet (5), empty oxygen mixing tank air intlet (6), empty oxygen mixing tank gas vent (7), the needle-valve oxygen go out
Mouth (3) is connected with empty oxygen mixing tank oxygen inlet (5)；Be equipped in the venturi (8) venturi hyperbaric oxygen air inlet (9),
Venturi nozzle (10), venturi air entry (11), venturi negative pressure cavity (13), venturi mixing chamber (14), venturi outlet
Mouth (15), the venturi air entry (11) are connected with empty oxygen mixing tank gas vent (7), it is characterised in that: the text mound
In venturi compensation air entry (12) is additionally provided on (8) tube wall, check valve is installed in venturi compensation air entry (12).
2. according to claim 1 a kind of with the ventilator gas circuit unit for stablizing tidal volume output, it is characterised in that: text
(8) are square-tube-shaped in mound.
3. according to claim 1 a kind of with the ventilator gas circuit unit for stablizing tidal volume output, it is characterised in that: institute
Air entry in mound (11) are stated on the one side of venturi (8) tube wall, venturi compensation air entry (12) is set to literary mound
In (8) tube wall the other three face either side on, venturi air entry (11) and venturi compensation air entry (12) be circular hole
The centerline of shape, the venturi air entry (11) and venturi compensation air entry (12) on same section, and perpendicular to
Airintake direction.
4. according to claim 1 a kind of with the ventilator gas circuit unit for stablizing tidal volume output, it is characterised in that: institute
State the center line and Venturi nozzle (10) gas outlet top end face of venturi air entry (11) and venturi compensation air entry (12)
Distance be 3~4mm；The aperture of venturi compensation air entry (12) is 1.5~φ of φ 3mm, venturi air entry (11)
Aperture be 3.5~φ of φ 4.5mm, Venturi nozzle (10) gas outlet aperture be 0.7~φ of φ 0.9mm.
5. according to claim 1 a kind of with the ventilator gas circuit unit for stablizing tidal volume output, it is characterised in that: institute
It states and check valve is installed at venturi air entry (11) and empty oxygen mixing tank air intlet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821656859.8U CN209451086U (en) | 2018-10-12 | 2018-10-12 | It is a kind of with stablize tidal volume output ventilator gas circuit unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821656859.8U CN209451086U (en) | 2018-10-12 | 2018-10-12 | It is a kind of with stablize tidal volume output ventilator gas circuit unit |
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| Publication Number | Publication Date |
|---|---|
| CN209451086U true CN209451086U (en) | 2019-10-01 |
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ID=68035293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821656859.8U Active CN209451086U (en) | 2018-10-12 | 2018-10-12 | It is a kind of with stablize tidal volume output ventilator gas circuit unit |
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| CN (1) | CN209451086U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111569769A (en) * | 2020-06-18 | 2020-08-25 | 河北沅碳科技有限公司 | Gas synergistic mixing device |
| CN116392690A (en) * | 2023-04-03 | 2023-07-07 | 牡丹江医学院 | Breathing machine capable of fully mixing oxygen |
-
2018
- 2018-10-12 CN CN201821656859.8U patent/CN209451086U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111569769A (en) * | 2020-06-18 | 2020-08-25 | 河北沅碳科技有限公司 | Gas synergistic mixing device |
| CN116392690A (en) * | 2023-04-03 | 2023-07-07 | 牡丹江医学院 | Breathing machine capable of fully mixing oxygen |
| CN116392690B (en) * | 2023-04-03 | 2024-02-23 | 牡丹江医学院 | Breathing machine capable of fully mixing oxygen |
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