CN209221226U - A kind of detection of gas flow rate device of ventilator - Google Patents
A kind of detection of gas flow rate device of ventilator Download PDFInfo
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- CN209221226U CN209221226U CN201820240090.5U CN201820240090U CN209221226U CN 209221226 U CN209221226 U CN 209221226U CN 201820240090 U CN201820240090 U CN 201820240090U CN 209221226 U CN209221226 U CN 209221226U
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Abstract
A kind of detection of gas flow rate device of ventilator, including airflow channel, cross-sectional shape are in rectangle；Airflow channel is equipped at least two detection holes；It further include flow vapour lock module, between two detection holes；Its cross-sectional shape is corresponding with airflow channel, and offers several air-through holes；The cross-section center of flow vapour lock module is equipped with rectangular centre runner, is provided with air-through holes；It is connect by multiple first connection ribs with rectangular centre runner in flow vapour lock module, constitutes each first connection rib into the radial cross section by flow vapour lock module and be divided into multiple ventilation zones, and be equipped with air-through holes in each ventilation zone.Compared to existing technologies, the utility model smart structural design solves the test problems in rectangular channel, improves the detection accuracy and stability of ventilator gas flow.
Description
Technical field
The utility model relates to ventilators, and in particular to a kind of detection of gas flow rate device of ventilator.
Background technique
Effective means of the ventilator as an energy artificial substituting expiratory positive airway pressure function, has been commonly used to caused by a variety of causes
Respiratory failure, the anesthesia respiration management during major operation, in Breathing Suppotion treatment and emergency resuscitation, in Modern Medical Field
Occupy highly important position, is that one kind can play prevention and treatment respiratory failure, reduces complication, save and extend patient
The vital Medical Devices of life.
Ventilator passes through acquisition data on flows at work, judges the expiration and air-breathing of patient, while supplying for patient
When required air-flow, suitable pressure difference value is judged, and then precisely effectively control is carried out targetedly to the gas output of ventilator,
To guarantee that patient will not cause to occur the case where uncomfortable or even life threatening because of control problem；In addition in acquisition data
When, for the stabilization of flow detecting signal, it is necessary to assure the pressure value at its both ends cannot have too big fluctuation, otherwise will cause
The erroneous judgement exhaled with air-breathing switching also also results in the uncomfortable even dangerous situation of patient and occurs, it can be seen that convenient pressure difference
To the importance for obtaining regime flow signal.
In general, flow detector used in ventilator mostly uses greatly V pyramidal structure, Venturi tube structure, hole on the market
Hardened structure etc. by the way that the pressure at both ends measures pressure difference before the throttling of measurement layer flow structure and after throttling, and then is calculated and is managed by it
Flow value in road.Above-mentioned existing structure has the advantages that accuracy is high, long-term working stability is good, reproducible, but V taper
Structure has its fatal defects, i.e., can not reversal measuring, and Venturi tube structure needs to occupy very long design space, to ventilator gas
The space requirement of road mould group is higher.
In addition, for ensure respiration machine overall noise limitation, need by the airpath design of ventilator at it is curved not
Regular shape guarantees while air-flow passes through, and can make the noise suppressed generated in chamber, does not reflex to outside ventilator
Portion；Therefore, flow detection module is set in irregular airflow channel, had both measured effective flow signal, meets control again
The requirement of noise processed is the technical issues of weighing of relatively having much difficulty in healing in this field；The flow sense especially arranged in approximate rectangular air flue
Device is surveyed, needs more detailed technical parameter to reach the data effectively measured.It finds during the experiment, if its relevant parameter
Using data, there are deviations, and very big deviation can be generated to the precision of detection, is unable to get effective measurement data, and be unfavorable for
Noise control.
Therefore, above-mentioned the shortcomings of the prior art how is solved, is become as the class to be researched and solved of the utility model
Topic.
Summary of the invention
The purpose of the utility model is to provide a kind of detection of gas flow rate devices of ventilator.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of detection of gas flow rate device of ventilator, the sensor module setting of corresponding ventilator；The flow inspection
Surveying device includes an airflow channel, which is opened in the host of the ventilator, and the cross of the airflow channel
Cross sectional shape is in rectangle；
One in front and one in back at least two detection holes are provided along its length on the airflow channel；The two equal gas circuits of detection hole
It is connected to the sensor module；
It wherein, further include a flow vapour lock module, which is positioned in the airflow channel, and is located at two
Between the detection hole；The cross-sectional shape of flow vapour lock module is in rectangle, opposite with the cross-sectional shape of the airflow channel
It answers, and offers several air-through holes；
Length direction of the cross-section center of flow vapour lock module along the cross section offers a rectangular centre runner, the square
At least one air-through holes are equipped in shape center flow channels；
Wherein, pass through multiple first connection ribs and the rectangular centre runner in the flow vapour lock module rectangular cross section
Connection constitutes each first connection rib into the radial cross section by flow vapour lock module and is divided into multiple ventilation zones, and each
An at least air-through holes are equipped in the ventilation zone.
Related content in above-mentioned technical proposal is explained as follows:
1. in above scheme, the cross-sectional shape phase of the cross-sectional shape and the airflow channel of the flow vapour lock module
Matching, the peripheral wall for constituting flow vapour lock module fit in the inner wall of the airflow channel.
2. in above scheme, four endpoints of the flow vapour lock module rectangular cross section pass through one described first respectively and connect
Rib is connect with four endpoints of the rectangular centre runner, constitutes four first connection ribs at radial for flow vapour lock module
Cross section be divided into four ventilation zones.
3. in above scheme, by the way that " four first connection ribs are divided at the radial cross section by flow vapour lock module
Four ventilation zones " constitute each air-through holes radial uniform cloth on the cross section of the flow vapour lock module
It sets.
4. in above scheme, the flow vapour lock module is detachably disposed in airflow channel, can also be integrally formed
In airflow channel.
5. in above scheme, the quantity of the air-through holes in each ventilation zone is odd number, and each logical
Each air-through holes in gas region are arranged in parallel；To reduce resonance, improve detection waveform.
6. in above scheme, the quantity of the air-through holes in each ventilation zone is prime number, and each logical
Each air-through holes in gas region are arranged in parallel；To eliminate resonance, detection waveform instability problem caused by resonance is overcome.
7. in above scheme, the quantity of the air-through holes in the rectangular centre runner is odd number, or
For prime number；It is preferred with prime number, to eliminate resonance, the waveform of stable detection.
8. further including two second connection ribs in above scheme, each second connection rib is parallel to flow vapour lock module cross section
Short side setting, and be respectively in the two sides in rectangular centre width of flow path direction；The second connection rib will be in the rectangle
Two ventilation zones of heart flow channel length direction two sides are divided into two sub-regions respectively.Constitute the face of four subregions
Product is same or similar seemingly with the area of two ventilation zones of rectangular centre flow channel length direction two sides, to guarantee its air velocity
Uniformly, the turbulent phenomenon that air-flow is generated in high flow rate is reduced.
9. in above scheme, the width W of the flow vapour lock module is the 100% ~ 300% of its height H.It is effectively logical to meet
Gas section facilitates the layout of air-through holes.
10. in above scheme, the width W of the flow vapour lock module is the 150% ~ 250% of its height H.
11. in above scheme, the width W of the flow vapour lock module is the 150% ~ 200% of its height H, preferably 167%.
12. in above scheme, the side of the flow vapour lock module face airflow direction is air intake surface, back to airflow direction
Side be outlet air surface；The distance for defining entrance to the flow vapour lock module air intake surface of the airflow channel is the first length
L1, the total length for defining the airflow channel is the second length L2, then the second length L2 is the first length L1's
500%~800%。
13. in above scheme, the side of the flow vapour lock module face airflow direction is air intake surface, back to airflow direction
Side be outlet air surface；The distance for defining entrance to the flow vapour lock module air intake surface of the airflow channel is the first length
L1, the first length L1 are the 150% ~ 350% of the flow vapour lock module height H.To be lifted into flow vapour lock module
Airflow stability guarantees measurement accuracy and reliable measurement.
14. in above scheme, the first length L1 is the 200% ~ 350% of the flow vapour lock module height H.
15. in above scheme, the first length L1 is the 220% ~ 300% of the flow vapour lock module height H.
16. in above scheme, define the flow vapour lock module with a thickness of d, define the center line in upstream detection hole extremely
The distance of the flow vapour lock module air intake surface is d1, then d1 is 1.2mm-2.5mm；The position in detected downstream hole and upstream detection
The position in hole is centrosymmetrically arranged with the flow vapour lock module.
17. in above scheme, the preferred 1.2mm-1.8mm of d1, further preferred 1.3mm-1.5mm.
18. in above scheme, the center line distance for defining two detection holes is d2, then d2=d+2d1.
19. in above scheme, detection of the air-flow that the airflow channel enters by the flow vapour lock module, in upstream
Pressure drop is produced between hole and the detection hole in downstream；When air-flow enters the flow vapour lock module, the speed phase of fluid
To acceleration, this air facilitated in airflow channel generates biggish signal and judges for control system when being in low discharge, i.e.,
The signal resolution under low flow condition can be improved.
20. in above scheme, by the setting of the flow vapour lock module, not only acting as generation pressure difference, service detection is empty
The purpose of throughput will more be led to by the special designing of each ventilation zone so that flow vapour lock module can also be used to rectify simultaneously
The air-flow crossed is combed, and more smoothly laminar flow structure is appeared as.
The working principle and advantage of the utility model are as follows:
A kind of detection of gas flow rate device of ventilator of the utility model, including airflow channel, cross-sectional shape are in rectangle；
Airflow channel is equipped at least two detection holes；It further include flow vapour lock module, between two detection holes；Its cross-sectional shape with
Airflow channel is corresponding, and offers several air-through holes；The cross-section center of flow vapour lock module is equipped with rectangular centre runner,
It is provided with air-through holes；It is connect, is constituted each with rectangular centre runner by multiple first connection ribs in flow vapour lock module
First connection rib is divided into multiple ventilation zones at the radial cross section by flow vapour lock module, and in each ventilation zone
Equipped with air-through holes.
Compared to existing technologies, the utility model smart structural design solves the test problems in rectangular channel, mentions
The high detection accuracy and stability of ventilator gas flow.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the utility model embodiment airflow channel；
Attached drawing 2 is the cross-sectional view in the utility model embodiment airflow channel at flow vapour lock module；
Attached drawing 3 is the schematic diagram of partial cross at flow vapour lock module in the utility model embodiment airflow channel；
Attached drawing 4 is the A-A profile structure diagram of Fig. 3.
In the figures above: 1. airflow channels；2. detection hole；3. flow vapour lock module；4. air-through holes；5. rectangular centre
Runner；6. the first connection rib；7. ventilation zone；8. the second connection rib；9. subregion；10. air intake surface；11. outlet air surface；L1.
One length；L2. the second length；D. the thickness of flow vapour lock module；D1. the center line in upstream detection hole to flow vapour lock module into
The distance in wind face；D2. the center line distance of two detection holes；H. the height of flow vapour lock module；W. the width of flow vapour lock module.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments:
Embodiment: referring to shown in attached drawing 1 ~ 4, a kind of detection of gas flow rate device of ventilator corresponds to a biography of ventilator
Sensor module setting；The flow detector includes a straight airflow channel 1, which is opened in the breathing
It is corresponding with the air inlet of gas circuit mould group in the gas circuit mould group of machine host, and the cross-sectional shape of the airflow channel 1 is in square
Shape.
One in front and one in back two detection hole 2 is provided along its length on the airflow channel 1；The two equal gas circuits of the detection hole 2
It is connected to the sensor module；The front detection hole 2 in the direction of the air flow be located at air-flow upstream, rear detection hole 2
In the downstream of air-flow.
It wherein, further include a flow vapour lock module 3, which is positioned in the airflow channel 1, and position
Between two detection holes 2；The flow vapour lock module 3 be detachably disposed in airflow channel 1, can also integrally at
Type is in airflow channel 1.
The cross-sectional shape of the flow vapour lock module 3 is in rectangle, opposite with the cross-sectional shape of the airflow channel 1
It answers, and offers several air-through holes 4；The peripheral wall of flow vapour lock module 3 fits in the inner wall of the airflow channel 1.
The air-flow that the airflow channel 1 enters is by the flow vapour lock module 3, in detection hole 2 and the downstream of upstream
Pressure drop is produced between detection hole 2；When air-flow enters the flow vapour lock module 3, the speed of air-flow is opposite to be accelerated, this
The air facilitated in airflow channel 1 generates biggish signal and judges for control system when being in low discharge, it can improve
Signal resolution under low flow condition.
Wherein, as shown in Fig. 2, length direction of the cross-section center of the flow vapour lock module 3 along the cross section is horizontal
If the vertical direction for offering a cross section rectangular centre runner 5(is length direction, rectangular centre runner 5 opens up vertically),
At least one air-through holes 4 are equipped in the rectangular centre runner 5.
Four endpoints of 3 rectangular cross section of flow vapour lock module pass through one first connection rib 6 and the rectangle respectively
Four endpoints of center flow channels 5 connect, and constitute four first connection ribs 6 and draw at the radial cross section by flow vapour lock module 3
It is divided into four ventilation zones 7, and is equipped at least one air-through holes 4 in each ventilation zone 7；It constitutes each described
Air-through holes 4 are radial on the cross section of the flow vapour lock module 3 to be evenly arranged.
The quantity of the air-through holes 4 in each ventilation zone 7 and in the rectangular centre runner 5 is surprise
Several or prime number is preferred with prime number, and each air-through holes 4 in each ventilation zone 7 are arranged in parallel, to eliminate resonance,
Overcome detection waveform instability problem caused by resonance.
It wherein, further include two second connection ribs 8, each second connection rib 8 is parallel to the short side of 3 cross section of flow vapour lock module
Setting, and it is respectively in the two sides of 5 width direction of rectangular centre runner；Described second connects rib 8 for the rectangular centre stream
Two ventilation zones 7 of 5 length direction two sides of road are divided into two sub-regions 9 respectively.Constitute the face of four subregions 9
Product is same or similar seemingly with the area of two ventilation zones 7 of 5 length direction two sides of rectangular centre runner, to guarantee its air velocity
It is uniform, reduce the turbulent phenomenon that air-flow is generated in high flow rate.
By the setting of the flow vapour lock module 3, generation air-flow differential is not only acted as, convenient for detecting the mesh of air mass flow
, more by the special designing of each ventilation zone 7, so that flow vapour lock module 3 can also be used to rectify simultaneously, the air-flow that will pass through
It is combed, appears as more smoothly laminar flow structure.
Wherein, as shown in figure 4, the width W of the flow vapour lock module 3 is the 100% ~ 300% of its height H, have to meet
Effect ventilation section, facilitates the layout of air-through holes 4.Alternatively, the width W of the flow vapour lock module 3 is its height H's
150% ~ 250%, further, width W is the 150% ~ 200% of its height H, and is preferred with 167%.
Wherein, the side of the 3 face airflow direction of flow vapour lock module is air intake surface 10, back to the side of airflow direction
For outlet air surface 11；The distance for defining entrance to 3 air intake surface 10 of flow vapour lock module of the airflow channel 1 is the first length
L1, the total length for defining the airflow channel 1 is the second length L2, then the second length L2 is the first length L1's
500%~800%.The first length L1 is the 150% ~ 350% of the flow vapour lock module height H.To be lifted into flow vapour lock
The airflow stability of module 3 guarantees measurement accuracy and reliable measurement.
Further, the first length L1 be the flow vapour lock module height H 200% ~ 350%, preferably 220% ~
300%。
Wherein, define the flow vapour lock module 3 with a thickness of d, define the center line in upstream detection hole 2 to the flow
The distance of 3 air intake surface 10 of vapour lock module is d1, then d1 is 1.2mm-2.5mm；The position and upstream detection hole 2 in detected downstream hole 2
Position being centrosymmetrically arranged with the flow vapour lock module 3.The center line distance for defining two detection holes 2 is d2, then
d2=d+2d1.The preferred 1.2mm-1.8mm of d1, further preferred 1.3mm-1.5mm.
Compared to existing technologies, the utility model smart structural design solves the test problems in rectangular channel, mentions
The high detection accuracy and stability of ventilator gas flow.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (10)
1. a kind of detection of gas flow rate device of ventilator, the sensor module setting of corresponding ventilator；It is characterized by: institute
Stating flow detector includes an airflow channel, which is opened in the host of the ventilator, and the air-flow
The cross-sectional shape in channel is in rectangle；
One in front and one in back at least two detection holes are provided along its length on the airflow channel；The two equal gas circuit connections of detection hole
In the sensor module；
It wherein, further include a flow vapour lock module, which is positioned in the airflow channel, and is located at described in two
Between detection hole；The cross-sectional shape of flow vapour lock module is in rectangle, corresponding with the cross-sectional shape of the airflow channel, and
Offer several air-through holes；
Length direction of the cross-section center of flow vapour lock module along the cross section offers a rectangular centre runner, in the rectangle
At least one air-through holes are equipped in heart runner；
Wherein, connected in the flow vapour lock module rectangular cross section by multiple first connection ribs and the rectangular centre runner
It connects, constitutes each first connection rib into the radial cross section by flow vapour lock module and be divided into multiple ventilation zones, and each institute
It states and is equipped with an at least air-through holes in ventilation zone.
2. flow detector according to claim 1, it is characterised in that: the flow vapour lock module rectangular cross section
Four endpoints pass through the first connection rib respectively and connect with four endpoints of the rectangular centre runner, constitute four first
It connects rib and is divided into four ventilation zones at the radial cross section by flow vapour lock module.
3. flow detector according to claim 1, it is characterised in that: the air stream in each ventilation zone
The quantity of through-hole is odd number.
4. flow detector according to claim 1, it is characterised in that: the air stream in each ventilation zone
The quantity of through-hole is prime number.
5. flow detector according to claim 1, it is characterised in that: further include two second connection ribs, each second connects
Rib is parallel to the short side setting of flow vapour lock module cross section, and is respectively in the two of rectangular centre width of flow path direction
Side；
Two ventilation zones of rectangular centre flow channel length direction two sides are divided into two by the second connection rib respectively
Sub-regions.
6. flow detector according to claim 1, it is characterised in that: the width W of the flow vapour lock module is it
The 100% ~ 300% of height H.
7. flow detector according to claim 1, it is characterised in that: the width W of the flow vapour lock module is it
The 150% ~ 250% of height H.
8. flow detector according to claim 1, it is characterised in that: the flow vapour lock module face airflow direction
Side be air intake surface, back to the side of airflow direction be outlet air surface；The entrance of the airflow channel is defined to the flow gas
The distance for hindering module air intake surface is the first length L1, and the total length for defining the airflow channel is the second length L2, then described the
Two length L2 are the 500% ~ 800% of the first length L1.
9. flow detector according to claim 1, it is characterised in that: the flow vapour lock module face airflow direction
Side be air intake surface, back to the side of airflow direction be outlet air surface；The entrance of the airflow channel is defined to the flow gas
The distance for hindering module air intake surface is the first length L1, the first length L1 be the flow vapour lock module height H 150% ~
350%。
10. flow detector according to claim 1, it is characterised in that: define the thickness of the flow vapour lock module
For d, the distance for defining center line to the flow vapour lock module air intake surface in upstream detection hole is d1, then d1 is 1.2mm-
2.5mm；Position being centrosymmetrically arranged with the flow vapour lock module of the position in detected downstream hole and upstream detection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820240090.5U CN209221226U (en) | 2018-02-09 | 2018-02-09 | A kind of detection of gas flow rate device of ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820240090.5U CN209221226U (en) | 2018-02-09 | 2018-02-09 | A kind of detection of gas flow rate device of ventilator |
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| Publication Number | Publication Date |
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| CN209221226U true CN209221226U (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820240090.5U Active CN209221226U (en) | 2018-02-09 | 2018-02-09 | A kind of detection of gas flow rate device of ventilator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114209940A (en) * | 2021-12-30 | 2022-03-22 | 江苏鱼跃医疗设备股份有限公司 | Breathing phase control method of breathing machine based on dynamic threshold |
-
2018
- 2018-02-09 CN CN201820240090.5U patent/CN209221226U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114209940A (en) * | 2021-12-30 | 2022-03-22 | 江苏鱼跃医疗设备股份有限公司 | Breathing phase control method of breathing machine based on dynamic threshold |
| CN114209940B (en) * | 2021-12-30 | 2024-01-02 | 江苏鱼跃医疗设备股份有限公司 | Breathing phase control method of breathing machine based on dynamic threshold |
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