CN102284116A - Flowmeter unit, flowmeter and flow measurement method - Google Patents
Flowmeter unit, flowmeter and flow measurement method Download PDFInfo
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- CN102284116A CN102284116A CN2011101273290A CN201110127329A CN102284116A CN 102284116 A CN102284116 A CN 102284116A CN 2011101273290 A CN2011101273290 A CN 2011101273290A CN 201110127329 A CN201110127329 A CN 201110127329A CN 102284116 A CN102284116 A CN 102284116A
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- flow
- effusion meter
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- pressure
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- 238000000691 measurement method Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims description 57
- 239000012530 fluid Substances 0.000 claims description 38
- 238000005259 measurement Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 28
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000037237 body shape Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Pulmonology (AREA)
- General Physics & Mathematics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a method for measuring a gas flow by a flowmeter device. When the gas flow passes through the device, the pressure drops. The pressure drop of the device is the size of the gas flow. The gas can flow through a pipeline and the pipeline comprises a flow channel at the upflow side of the pipeline and the cross section of the channel is gradually reduced along the downflow direction. Thus, the pressure drop generation unit of the device has the minimum volume in the upflow of the channel.
Description
Technical field
The invention provides the effusion meter unit and measure fluidic method.Particularly, the present invention proposes based on measuring fluid and flow through the pressure decline that flow-limiting valve produces, measure the flow of the media that flows through the passage of placing described flow-limiting valve.More specifically, the present invention includes aforementioned content application in medical breathing machine, anesthetis or similar breathing apparatus.
Background technology
Measure the method for flow by flow-limiting valve and use always, and this method is all effective for liquids and gases, for example for the flow regulator in the ventilation installation.The for example ventilation unit application that in United States Patent (USP) 5265594 and Swedish patent 529989, discloses.
In United States Patent (USP) 5265594, disclosed a kind of flow regulator that is used to measure the throughput at the gas passage upper reaches by control valve.
In Swedish patent 529989, disclosed throughput how to use flow-limiting valve to measure the gas passage upper reaches of control valve.
When measuring fluid flow, measurement gas and liquid have an important difference, that is exactly that gas can compress, and liquid is actually and cannot compresses.This has just caused some undesired effects to produce, and for example because the capacity that pressure generation flow flows between described choke valve and the control valve causes having influenced flow measurement, so just the flow signal based on described effusion meter produces or controlled flow.
If flow-limiting valve is positioned at the upper reaches of control valve, can produce the flow of mistake owing to the variation of pressure at the outfan of described device.In aerarium equipment, these a plurality of valves that just mean common outfan can influence each other.
A kind of method that reduces described undesired gas pinch effect is by reduce the capacity between flow-limiting valve and the control valve, can realize by using the low discharge flow-limiting valve as far as possible.But, the shortcoming that the linearity of flow pressure is arranged like this and dynamically all descends, correlated increase flow-disturbing when being high flow capacity.
Summary of the invention
An object of the present invention is to provide a kind of device, have relative big surface and relatively little capacity at the flow-limiting valve and the control valve interface of this device with flow-limiting valve.
These targets realize that by the apparatus and method of following independent claims some special embodiments are in the subordinate claim.
The present invention is mainly in order to alleviate or to eliminate above-mentioned one or more weak point of the prior art, and the apparatus and method that the claim by one or combination in any proposes solve.
The method of the gas flow of flowermeter is flow through in a kind of measurement.Producing pressure when the described effusion meter of fluid process descends.It is the tolerance of fluid flow that the pressure of described effusion meter descends, this device can be crossed pipeline for liquid, upstream side at described pipeline has traffic channel, the downflow direction that the transverse cross-sectional area of this traffic channel can be crossed pipeline along described fluid reduces, the fluid passage by regulating described device and produce little capacity from the geometry of the fluid flow profile of described flow valve effluent air.The minimum capacity at passage upper reaches of the pressure decline generating portion of described device so just is provided.
In certain embodiments, be that place at the center from the described outlet of gas trap, the fluid flow profile of described outlet has the taper of connection.In other embodiments, described outlet is co-axial with the flow profile that is described as pipeline.
Embodiments of the invention are used for the purpose of flow profile by the geometry that designs described device, but sample just can be made the flow-limiting valve that is used for above various valve-types.
By one aspect of the present invention, a kind of effusion meter unit is provided, comprise pipe-line cell and the flow-limiting valve in described pipe-line cell.
Described pipe-line cell comprises the connecting interface with flow valve, and described current limliting unit comprises that the liquid of a sealing can cross valve body, can form one like this and can cross passage along flowing to the liquid that the downflow direction cross section diminishes gradually on the described pipeline.
In one embodiment, described pipe-line cell is an exterior line, described exterior line and liquid can be crossed valve body and be arranged in the position relative to each other, and the inboard of described exterior line and described liquid can be crossed between the valve body and reduce gradually along the unitary longitudinal direction distance of described effusion meter.
By regulating the unitary fluid passage of described effusion meter and from the geometry of the flow profile of the flow-limiting valve of flow valve trickle, when so just making the relatively large surface that obtains described choke valve between the interface of the exterior line of described choke valve and valve less capacity become possibility.Failing to be convened for lack of a quorum on before the described choke valve produces the pressure that increases, and for example, the dirty pressure of Compressed Gas and described pressure limiting valve descends when the flow opposing increases.Flow in the variation of described pressure and the passage is proportional, so just can measure flow.
In the more unitary embodiment of flowmeter survey, it is taper that the liquid of described sealing can be crossed valve body.
A kind of mode that realizes above-mentioned design be described liquid can cross valve body shape at the upper reaches or dirtyly be taper.
Among the unitary embodiment of described effusion meter, it is the part taper that described sealing liquid can be crossed valve body.
A kind of mode that realizes above-mentioned design be described liquid can cross valve body shape at the upper reaches or dirtyly be the part taper.
Can the crossing any one the geometry of cross section in the pipeline with liquid and can be circular, polygon or ellipse of described exterior line.
In some embodiments of the invention, described effusion meter unit also comprises differential pressure gauge, described differential pressure gauge is connected each side that liquid can be crossed valve body, and the pressure differential that described liquid can be crossed the flow of valve body is flow through in described differential pressure gauge measurement, and described pressure differential is used for measuring flow.
The described effusion meter unit of some embodiments of the present invention comprises flow valve, and described flow valve is connected unitary first connecting interface of described effusion meter.
In the some embodiments of the present invention, described effusion meter unit comprises second connecting interface identical with the connecting interface of described flow valve.
By have the mechanical joints that adapts to sealing flow valve body effusion meter and the effusion meter that has with the second identical interface of the interface of described flow valve, described device can be connected with existing apparatus.
Another aspect of the present invention, comprise a kind of flow-measuring method, use the current limliting unit in this method, the liquid of placing in the unitary fluid passage of described current limliting can be crossed between the exterior line of valve body and connecting interface has relatively large surface and relative less capacity; Can cross valve body to arrange by described exterior line and liquid the relative mode that can cross between the valve body distance that reduces gradually along the longitudinal direction of effusion meter at described exterior line inside and liquid, so just formed described less relatively capacity, so just improve described liquid and can cross the pressure at the pressure upper reaches (P1) of valve body, reduced the pressure of pressure dirty (P2), the difference and the flow of described pressure are proportional.
One side more of the present invention provides a kind of method of measuring flow, comprise the flow of measuring the liquid that flows through flowermeter, producing pressure when the described effusion meter of fluid process descends, it is the tolerance of fluid flow that the pressure of described effusion meter descends, described method comprises: a device is provided, this device can be crossed pipeline for liquid, upstream side at described pipeline has traffic channel, the downflow direction that the transverse cross-sectional area of this traffic channel can be crossed pipeline along described fluid reduces, and described method comprises the minimum capacity at the passage upper reaches that the pressure of described device decline generating portion is provided.
The advantage of method of the present invention and device can measure easily at the flow of the output of traffic channel or valve, and described measurement can not disturbed by the generation of wrong flow.
Description of drawings
These or other aspect of the present invention, characteristic and advantage can by below in conjunction with the description of embodiment illustrate, as follows for the description of the drawings:
Figure 1 shows that the present invention is applicable to the upward structural representation of an embodiment of the flow valve of flow export of periphery circulation;
Figure 2 shows that the present invention is applicable to the upward structural representation of the another embodiment of the flow valve of flow export of periphery circulation;
Figure 3 shows that the present invention is applicable to the structural representation of the embodiment that the flow valve of peripheral loop exit is dirty;
Figure 4 shows that the present invention is applicable to the structural representation of the another embodiment that the flow valve of peripheral loop head is dirty;
Figure 5 shows that the present invention is applicable to the structural representation of an embodiment of the flow valve at central outlets upper reaches;
Figure 6 shows that the present invention is applicable to the structural representation of the embodiment that the central flow valve that enters the mouth is dirty;
Figure 7 shows that the present invention is applicable to the structural representation of an embodiment at the flow valve upper reaches with peripheral loop exit;
Figure 8 shows that the present invention has the structural representation of an embodiment at the flow valve upper reaches of peripheral loop exit.
The specific embodiment
The present invention is mainly in order to alleviate or to eliminate above-mentioned one or more weak point of the prior art, and the apparatus and method that the claim by one or combination in any proposes solve.
According to one embodiment of the invention, the method for the gas flow of flowermeter is flow through in a kind of measurement, produces pressure and descend when the described effusion meter of fluid process.It is the tolerance of fluid flow that the pressure of described effusion meter descends, this device can be crossed pipeline for liquid, upstream side at described pipeline has traffic channel, the downflow direction that the transverse cross-sectional area of this traffic channel can be crossed pipeline along described fluid reduces, the fluid passage by regulating described device and produce little capacity from the geometry of the fluid flow profile of described flow valve effluent air.The minimum capacity at passage upper reaches of the pressure decline generating portion of described device so just is provided.
In certain embodiments, be that place at the center from the described outlet of gas trap, the fluid flow profile of described outlet has the taper of connection.In other embodiments, described outlet is co-axial with the flow profile that is described as pipeline.
Embodiments of the invention are used for the purpose of flow profile by the geometry that designs described device, but sample just can be made the flow-limiting valve that is used for above various valve-types.
By one aspect of the present invention, a kind of effusion meter unit is provided, comprise pipe-line cell and the flow-limiting valve in described pipe-line cell.
Described pipe-line cell comprises the connecting interface with flow valve, and described current limliting unit comprises that the liquid of a sealing can cross valve body, can form one like this and can cross passage along flowing to the liquid that the downflow direction cross section diminishes gradually on the described pipeline.
In one embodiment, described pipe-line cell is an exterior line, described exterior line and liquid can be crossed valve body and be arranged in the position relative to each other, and the inboard of described exterior line and described liquid can be crossed between the valve body and reduce gradually along the unitary longitudinal direction distance of described effusion meter.
By regulating the unitary fluid passage of described effusion meter and from the geometry of the flow profile of the flow-limiting valve of flow valve trickle, when so just making the relatively large surface that obtains described choke valve between the interface of the exterior line of described choke valve and valve less capacity become possibility.Failing to be convened for lack of a quorum on before the described choke valve produces the pressure that increases, and for example, the dirty pressure of Compressed Gas and described pressure limiting valve descends when the flow opposing increases.Flow in the variation of described pressure and the passage is proportional, so just can measure flow.
In the more unitary embodiment of flowmeter survey, it is taper that the liquid of described sealing can be crossed valve body.
A kind of mode that realizes above-mentioned design be described liquid can cross valve body shape at the upper reaches or dirtyly be taper.
Among the unitary embodiment of described effusion meter, it is the part taper that described sealing liquid can be crossed valve body.
A kind of mode that realizes above-mentioned design be described liquid can cross valve body shape at the upper reaches or dirtyly be the part taper.
Can the crossing any one the geometry of cross section in the pipeline with liquid and can be circular, polygon or ellipse of described exterior line.
In some embodiments of the invention, described effusion meter unit also comprises differential pressure gauge, described differential pressure gauge is connected each side that liquid can be crossed valve body, and the pressure differential that described liquid can be crossed the flow of valve body is flow through in described differential pressure gauge measurement, and described pressure differential is used for measuring flow.
The described effusion meter unit of some embodiments of the present invention comprises flow valve, and described flow valve is connected unitary first connecting interface of described effusion meter.
In the some embodiments of the present invention, described effusion meter unit comprises second connecting interface identical with the connecting interface of described flow valve.
By have the mechanical joints that adapts to sealing flow valve body effusion meter and the effusion meter that has with the second identical interface of the interface of described flow valve, described device can be connected with existing apparatus.
Another aspect of the present invention, comprise a kind of flow-measuring method, use the current limliting unit in this method, the liquid of placing in the unitary fluid passage of described current limliting can be crossed between the exterior line of valve body and connecting interface has relatively large surface and relative less capacity; Can cross valve body to arrange by described exterior line and liquid the relative mode that can cross between the valve body distance that reduces gradually along the longitudinal direction of effusion meter at described exterior line inside and liquid, so just formed described less relatively capacity, so just improve described liquid and can cross the pressure at the pressure upper reaches (P1) of valve body, reduced the pressure of pressure dirty (P2), the difference and the flow of described pressure are proportional.
One side more of the present invention provides a kind of method of measuring flow, comprise the flow of measuring the liquid that flows through flowermeter, producing pressure when the described effusion meter of fluid process descends, it is the tolerance of fluid flow that the pressure of described effusion meter descends, described method comprises: a device is provided, this device can be crossed pipeline for liquid, upstream side at described pipeline has traffic channel, the downflow direction that the transverse cross-sectional area of this traffic channel can be crossed pipeline along described fluid reduces, and described method comprises the minimum capacity at the passage upper reaches that the pressure of described device decline generating portion is provided.
The advantage of method of the present invention and device: the flow in the output of traffic channel or valve can be measured easily, and described measurement can not disturbed by the generation of wrong flow.
Be illustrated in figure 1 as the device of one embodiment of the invention, wherein flowing and can cross part taper 11 by gas in pipeline 10 from the air-flow of flow valve flows to dirty.Because the shape of cone 11, the cross section of described fluid passage reduces gradually to the downflow direction of cone 11.Sinuous flow and capacity between the inlet upper reaches of cone 11 and pipeline 10 have been reduced in this way.The pressure of flow of measuring the upstream of this taper is P1.Pressure P 2 is the dirty gaging pressure of described circular cone.The difference of described P2 and P1 is exactly a kind of tolerance mode of described flow.
Because minimum sinuous flow and minimum capacity between the last inflow entrance of taper 11 and pipeline 10, better flow measurement just can be achieved.So the pressure differential of described fluid passage is depended in flow measurement to a great extent.The signal of the pressure differential of described P2 and P1 provides the gas flow of flow valve control reliably rapidly.
Device shown in Figure 1 is applicable to the flow valve with upper reaches periphery loop exit.For example, described flow valve can be by suitable flange (not shown) or by using seal groove (as shown in Figure 8) to be fixed on the effusion meter.
In other the embodiment of flowmeter system, except pressure differential P2-P1, other parameters also can be measured, for example: gas temperature, pressure P 2, gas viscosity or gas density.These parameters can linearisation.Can make the measurement of flow more accurate like this.
Be illustrated in figure 2 as the sketch map that the present invention is applicable to another embodiment of the flow valve with peripheral loop exit upper reaches.In the present embodiment, can to cross unit 21 are the cylinders with a upper reaches blind end to gas.Because the area of the cross section of the embedded body 22 in the fluid passage can be crossed unit 21 fixing point directions to described columniform gas and reduce gradually in the fluid passage, so the cross-sectional area of fluid passage reduces gradually to downflow direction.
In other embodiments, also can adopt conical gas can cross unit and taper embedded body, as Fig. 5 and shown in Figure 6.
Described path and embedded body can be designed as integrated unit.
Be illustrated in figure 3 as and be applicable to dirty flow valve with peripheral loop head.A conical gas can be crossed unit 31 and be arranged in the passage 30.Simultaneously herein, the fore-and-aft distance that can cross the flow valve between valve body at described pipeline outside and liquid changes.
Figure 4 shows that an embodiment who is applicable to flow valve with peripheral loop head.In the present embodiment, can to cross unit 41 be cylindrical to gas and have a dirty blind end.Here same, the distance that can cross the unitary longitudinal direction of effusion meter between the valve body at described passage outside and liquid changes.
Has the upward sketch map of the embodiment of the flow valve of flow export of central authorities as shown in Figure 5.Gas with taper embedded body 52 can be crossed unit 51, but described two unitary chamber differences.Described conical gas can be crossed unit 51 and have a chamber bigger than taper embedded body 52.In this way, between the fluid choke valve of described device and control valve interface, has very little capacity.
Be illustrated in figure 6 as dirty sketch map with embodiment of the central flow valve that enters the mouth.Have conical gas and can cross unit and taper embedded body 62, but described two unitary chamber differences.Described conical gas can be crossed unit 61 and have the cavity lower than taper embedded body 62.In this way, between the fluid choke valve of described device and control valve interface, has very little capacity.
Be illustrated in figure 7 as and be applicable to have the sketch map that periphery is gone up the flow valve of flow export.Comprise that cylindrical embedded body and conical gas can cross unit 71.Same, the fore-and-aft distance that unitary described external channel of described effusion meter and liquid can be crossed between the valve body changes, and so the capacity between the choke valve of described device and the control valve interface can be very little.
Be illustrated in figure 8 as and have central authorities' inlet and axially export the valve 200 that is connected described device.Described device has mechanical interface and cooperates described valve interface.Described device interface is consistent with the interface of valve below figure.Described like this device can connect in the mode of present design.Every side ports that gas can be crossed the vertebral body 81 that material makes has pressure transducer 201.Signal by this sensor emission can be measured air-flow.Above content be in conjunction with concrete embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (16)
1. effusion meter unit, it is characterized in that, comprise: pipe-line cell and the current limliting unit that is installed in the described pipe-line cell, described pipe-line cell comprises the connecting interface with flow valve, and described current limliting unit comprises that the liquid of a sealing can be crossed valve body and form one and can cross passage along flowing to the liquid that the downflow direction cross section diminishes gradually on the described pipeline.
2. effusion meter as claimed in claim 1 unit, it is characterized in that: described pipe-line cell is an exterior line, described exterior line and liquid can be crossed valve body and be arranged in the position relative to each other, and the inboard of described exterior line and described liquid can be crossed between the valve body and reduce gradually along the unitary longitudinal direction distance of described effusion meter.
3. as claim 1 or 2 each described effusion meter unit, it is characterized in that: described liquid can be crossed the tubular valve body that being shaped as of valve body has a blind end.
4. effusion meter as claimed in claim 3 unit is characterized in that: the fluid passage of described closing pipe line is dirty to have the zone that a cross section reduces gradually.
5. as each described effusion meter unit of claim 1 to 3, it is characterized in that: the upper reaches, fluid passage of described closing pipe line has the zone that a cross section reduces gradually.
6. effusion meter as claimed in claim 3 unit is characterized in that: it is cone that the liquid of described sealing can be crossed valve body.
7. as each described effusion meter unit of claim 1 to 6, it is characterized in that: described pipe-line cell comprises the insertion unit that changes described fluid passage conically.
8. effusion meter as claimed in claim 3 unit is characterized in that: it is the part cone that the liquid of described sealing can be crossed valve body.
9. as each described effusion meter unit of claim 1 to 8, it is characterized in that: the geometry of the cross section of described pipeline is circle, polygon or ellipse.
10. as each described effusion meter unit of claim 1 to 8, it is characterized in that: the geometry in the cross section of described pipeline is circle, polygon and oval-shaped mixing shape.
11. as each described effusion meter unit of claim 1 to 10, it is characterized in that: also comprise differential pressure gauge, described differential pressure gauge is connected each side that liquid can be crossed valve body, and the pressure differential that described liquid can be crossed the flow of valve body is flow through in described differential pressure gauge measurement.
12. as each described effusion meter unit of claim 1 to 11, it is characterized in that: comprise flow valve, described flow valve is connected unitary first connecting interface of described effusion meter.
13. effusion meter as claimed in claim 12 unit is characterized in that: described effusion meter unit comprises second connecting interface identical with the linkage unit of described flow valve.
14. an effusion meter is characterized in that: comprise the current limliting unit, the liquid of placing in the unitary fluid passage of described current limliting can be crossed between the exterior line of valve body and connecting interface has relatively large surface and relative less capacity; Can cross valve body to arrange by described exterior line and liquid the relative mode that can cross between the valve body distance that reduces gradually along the longitudinal direction of effusion meter at described exterior line inside and liquid, so just formed described less relatively capacity, so just improve described liquid and can cross the pressure at the pressure upper reaches of valve body, reduced the dirty pressure of pressure, the difference and the flow of described pressure are proportional.
15. flow-measuring method, measure flow by the liquid of flowermeter, producing pressure when the described effusion meter of fluid process descends, it is the tolerance of fluid flow that the pressure of described effusion meter descends, described method comprises: a device is provided, this device can be crossed pipeline for liquid, upstream side at described pipeline has traffic channel, the downflow direction that the transverse cross-sectional area of this traffic channel can be crossed pipeline along described fluid reduces, and described method comprises the minimum capacity at the passage upper reaches that the pressure of described device decline generating portion is provided.
16. method as claimed in claim 15 is characterized in that: comprise that measure differences in pressure, gas temperature, outlet pressure, gas viscosity and gas density are to determine flow.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SESE1050486-8 | 2010-05-17 | ||
| SE1050486A SE535494C2 (en) | 2010-05-17 | 2010-05-17 | Coaxial flowmeter element and method for measuring flow |
| SE1050486-8 | 2010-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102284116A true CN102284116A (en) | 2011-12-21 |
| CN102284116B CN102284116B (en) | 2016-05-25 |
Family
ID=45318713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110127329.0A Active CN102284116B (en) | 2010-05-17 | 2011-05-17 | Flow meter unit, flowmeter and flow-measuring method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102284116B (en) |
| SE (1) | SE535494C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104840201A (en) * | 2015-05-14 | 2015-08-19 | 天津大学 | Main flow type breathing flow real-time monitoring device and method |
| CN109688921A (en) * | 2016-09-03 | 2019-04-26 | 希普拉有限公司 | For measuring the device of patient respiration parameter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196680A (en) * | 1962-01-03 | 1965-07-27 | Itt | Flow tubes |
| US20020046612A1 (en) * | 2000-08-22 | 2002-04-25 | Fugasity Corporation | Fluid mass flow meter with substantial measurement range |
| US20070283962A1 (en) * | 2006-06-07 | 2007-12-13 | Ventus Medical, Inc. | Layered nasal devices |
| US20090064794A1 (en) * | 2007-09-06 | 2009-03-12 | Intermed - Equipamento Medica Hospitalar Ltda. | Flow sensor with double obstruction |
| CN101387529A (en) * | 2008-10-18 | 2009-03-18 | 崔从文 | Pressure device of cone flowmeter |
-
2010
- 2010-05-17 SE SE1050486A patent/SE535494C2/en unknown
-
2011
- 2011-05-17 CN CN201110127329.0A patent/CN102284116B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196680A (en) * | 1962-01-03 | 1965-07-27 | Itt | Flow tubes |
| US20020046612A1 (en) * | 2000-08-22 | 2002-04-25 | Fugasity Corporation | Fluid mass flow meter with substantial measurement range |
| US20070283962A1 (en) * | 2006-06-07 | 2007-12-13 | Ventus Medical, Inc. | Layered nasal devices |
| US20090064794A1 (en) * | 2007-09-06 | 2009-03-12 | Intermed - Equipamento Medica Hospitalar Ltda. | Flow sensor with double obstruction |
| CN101387529A (en) * | 2008-10-18 | 2009-03-18 | 崔从文 | Pressure device of cone flowmeter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104840201A (en) * | 2015-05-14 | 2015-08-19 | 天津大学 | Main flow type breathing flow real-time monitoring device and method |
| CN109688921A (en) * | 2016-09-03 | 2019-04-26 | 希普拉有限公司 | For measuring the device of patient respiration parameter |
Also Published As
| Publication number | Publication date |
|---|---|
| SE1050486A1 (en) | 2011-11-18 |
| CN102284116B (en) | 2016-05-25 |
| SE535494C2 (en) | 2012-08-28 |
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