CN107490407A - Flow sensor with simplified structure - Google Patents
Flow sensor with simplified structure Download PDFInfo
- Publication number
- CN107490407A CN107490407A CN201710291079.1A CN201710291079A CN107490407A CN 107490407 A CN107490407 A CN 107490407A CN 201710291079 A CN201710291079 A CN 201710291079A CN 107490407 A CN107490407 A CN 107490407A
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- China
- Prior art keywords
- extension
- flow
- detection channel
- pipe fitting
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 84
- 238000007789 sealing Methods 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 239000012528 membrane Substances 0.000 abstract description 2
- 230000000241 respiratory effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- G01F1/363—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 with electrical or electro-mechanical indication
-
- 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
- G01F1/50—Correcting or compensating means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Volume Flow (AREA)
Abstract
A flow sensor with simplified structure comprises a first pipe, a second pipe and an airflow diaphragm; the first pipe fitting is provided with a first detection channel which is directly communicated with a first extension pipe; the second pipe fitting is provided with a second detection channel which is connected with a second extension pipe; the airflow membrane is provided with an airflow wing plate and is positioned between the first detection channel and the second detection channel; the first extension pipe and the second extension pipe are positioned on one side of the second pipe, and the second pipe is hermetically combined with the first pipe, so that the second detection channel can be communicated with the second extension pipe.
Description
Technical field：
The present invention relates to a kind of flow sensor, particularly a kind of flow sensor for detecting patient respiratory flow should
Flow sensor has one first detection channel and one second detection channel, and the inside of the flow sensor sets an air-flow fin
(flow flap), the air-flow fin are located at the centre of first detection channel and second detection channel, first detection channel
One first extension and second detection channel one second extending part in the side of the flow sensor.
Background technology：
Prior art discloses DE 102010040287A1 patents of invention such as Germany, and main disclosed technology is a kind of
Flow sensor, including a flowing resistance body, one first housing section and one second housing section；The flowing resistance body is arranged at the first shell
Body portion and the centre of second housing section；First housing section has a first passage opening, one first tie point and one second
Tie point, second housing section have a second channel opening；Wherein first tie point connects the inside of first housing section,
And second tie point connects the inside of second housing section；During patient breaths, gas by the first passage opening towards this
Two passage open flows；During patient expiration, gas is by the second channel opening towards the first passage open flow；And by this
First tie point detects the pressure differential of one first interface channel and one second interface channel with second tie point.When first company
When contact and second tie point distinctly connect a pressure detection pipe, two pressure detection pipes are arranged at the one of first housing section
Side, so being easy to arrange two pressure detection pipes, and two pressure detection pipes can be avoided to be bent over.
The pressure detection passage of the prior art is complex, is not easy to manufacture processing, such as：Second housing section has
Flange extension, the flange extension are provided with one first slotted eye and one second slotted eye, and first tie point is via first groove
Hole cross connection is logical in second connection via the second slotted eye cross connection in first interface channel, second tie point
Road.The both sides of first slotted eye form two air-flow kinks and produce larger pressure change, and the both sides of second slotted eye are also
Form two air-flow kinks and produce larger pressure change.Furthermore the caliber of general respiratory system pipeline is smaller, respiratory flow
The diameter (about 30 millimeters) of quantity sensor slightly larger than respiratory system pipeline caliber (about 22 millimeters), first tie point and
Second tie point is arranged at the side of first housing section, when first tie point and second tie point distinctly connect a pressure
During force detection pipe, the operating space of two pressure detection pipes is smaller.Therefore, the prior art still has the demand of improvement.
The content of the invention：
The defects of for above prior art and improved demand, the object of the invention (one) are, there is provided one kind has letter
Change the flow sensor of structure, including one first pipe fitting, one second pipe fitting and an air-flow diaphragm (flow membrane)；This
One pipe fitting has one first detection channel, and first detection channel directly connects one first extension；Second pipe fitting has one
Second detection channel, second detection channel connect one second extension；The air-flow diaphragm has an air-flow fin (flow
Flap), the air-flow diaphragm is located at the centre of first detection channel and second detection channel；Wherein first extension is with being somebody's turn to do
Second extension is located at the side of second pipe fitting, and second pipe fitting sealing combines first pipe fitting so that second detecting is logical
Road can connect second extension.
The defects of for above prior art and improved demand, the object of the invention (two) are, there is provided one kind has letter
Change the flow sensor of structure, including one first pipe fitting, one second pipe fitting and an air-flow diaphragm；First pipe fitting has one first
Detection channel, first detection channel directly connect one first extension；Second pipe fitting has one second detection channel, and this
Two detection channels connect one second extension, and second pipe fitting sealing combines first pipe fitting so that second detection channel can
Connect second extension；The air-flow diaphragm has an incomplete circular line of cut to form an air-flow fin, the air-flow wing
Piece part is connected to the air-flow diaphragm so that the air-flow fin forms the circular edge of part.
Beneficial effect possessed by the present invention (one) is that the flow sensor can simplify the structure of pressure detection channel
And easily fabricated and processing, and the flow sensor can reduce the air-flow kink of pressure detection passage, to reduce pressure
Change.
Beneficial effect possessed by the present invention (two) is that the first extension and the second extension of the flow sensor can
A flared operating space is formed, first extension by the operating space can be easy to connect or remove a first pressure
Detecting pipe, second extension can be easy to connect or remove second pressure detecting and manage by the operating space.
Beneficial effect possessed by the present invention (three) is that the air-flow diaphragm of the flow sensor has an air-flow fin,
The air-flow diaphragm forms an air-flow fin by an incomplete circular line of cut, and air-flow fin part is connected to the air-flow film
Piece so that the air-flow fin forms the circular edge of part, to reduce the probability of sinuous flow.
Feature, technological means, concrete function and the specific embodiment of the present invention, after with schema, figure number detailed description
As after.
Brief description of the drawings：
Fig. 1 is the schematic perspective view of present pre-ferred embodiments.
Fig. 2 is the perspective exploded view of present pre-ferred embodiments.
Fig. 3 is Fig. 1 A-A profiles.
Fig. 4 is Fig. 1 B-B profiles.
Fig. 5 is the schematic perspective view of the first pipe fitting of the present invention.
Fig. 6 is Fig. 5 C-C profiles.
Fig. 7 is the schematic perspective view of the second pipe fitting of the present invention.
Fig. 8 is Fig. 7 D-D profiles.
Fig. 9 is another schematic perspective view of present pre-ferred embodiments.
Figure 10 is Fig. 9 E-E profiles.
Figure 11 and Figure 12 is the operation chart of present pre-ferred embodiments.
Embodiment：
Refer to shown in Fig. 1 to Fig. 8, in the preferred embodiment, flow sensor of the invention include one first pipe fitting 10,
One second pipe fitting 20 and an air-flow diaphragm 30；First pipe fitting 10 has one first detection channel 11 and one first airflow space
15, first detection channel 11 directly connects one first extension 13, and first airflow space 15 connects first detection channel
11, first detection channel 11 is shaped on first pipe fitting 10 with first extension 13；Second pipe fitting 20 has
One second detection channel 21 and one second airflow space 25, second detection channel 21 connect one second extension 23, and this second
Airflow space 25 connects second detection channel 21, second detection channel 21 and second extension 23 be shaped in this
On two pipe fittings 20, second pipe fitting 20 sealing combines first pipe fitting 10 so that second airflow space 25 connects first gas
Fluid space 15, and second detection channel 21 can connect second extension 23；The air-flow diaphragm 30 has an air-flow fin 35,
The air-flow diaphragm 30 is located at the centre of first detection channel 11 and second detection channel 21, when an air-flow passes through the air-flow film
During piece 30, two sides of the air-flow fin 35 can form a pressure differential；Wherein first extension 13 and second extension 23
Positioned at the side of second pipe fitting 20, the central shaft c1 of first extension 13 and first pipe fitting 10 forms one first angle
The central shaft c2 of a1, second extension 23 and second pipe fitting 20 forms one second angle a2, and first extension 13 is with being somebody's turn to do
Second extension 23 forms one the 3rd angle a3, and second detection channel 21 forms a turning part 231 with second extension 23.
The flow sensor of the present invention can be located at the side of second pipe fitting 20 in first extension 13 and second extension 23
Demand under, simplify the structure of pressure detection channel, such as：First detection channel 11 is integrally formed with first extension 13
In on first pipe fitting 10, and easily fabricated and processing.Furthermore flow sensor of the invention can reduce pressure detection passage
Air-flow kink, such as：When detecting the pressure of second pipe fitting 20, from second detection channel 21 to second extension
23, the turning part 231 is unique air-flow kink, to reduce the change of pressure.
The embodiment for illustrating first pipe fitting 10 is enumerated as after：First pipe fitting 10 has one first flange 12, and this
One flange 12 has a first lug 14, and first extension 13 forms a convex portion 131 through the first lug 14, and this first
Detection channel 11 is connected in line with first extension 13, as shown in Figure 5 to Figure 6.Therefore, when detecting first pipe fitting 10
Pressure when, from first detection channel 11 to first extension 13, first pipe fitting 10 does not have air-flow kink, to avoid
The change of pressure.
Refer to shown in Fig. 9 to Figure 10, enumerate and illustrate second detection channel 21 and the connection side of second extension 23
Formula is as after：Second pipe fitting 20 has one second flange 22, and second flange 22 has one second lug 26, the turning part 231
A through hole 261 is formed on second lug 26；First flange 12 has one the 3rd lug 16, and the 3rd lug 16 can be closed
The through hole 261 so that second detection channel 21 connects second extension 23.Second pipe fitting 20 sealing combines first pipe
During part 10, second flange 22 can be sealed with reference to first flange 12, and second lug 26 can seal convex with reference to the 3rd
Ear 16.Furthermore the 3rd lug 16 can further have a groove 161, and the position correspondence of the through hole 261 is in the groove 161
Position, to increase the gas flow space of the through hole 261, and reduce the influence that the turning part 231 is bent for air-flow.
The embodiment for illustrating first and second detection channel 11,21 is enumerated as after：When the patient inhales, gas g by
Second airflow space 25 is flowed towards first airflow space 15, and the air-flow fin 35 is opened towards first airflow space 15
Open so that two sides of the air-flow fin 35 can form a pressure differential；As the patient exhales, gas g is by first airflow space
15 are flowed towards second airflow space 25, and the air-flow fin 35 is opened towards second airflow space 25 so that the air-flow wing
Two sides of piece 35 can form another pressure differential, as shown in Figures 3 to 8.
The preferable pressure detection position for illustrating first and second detection channel 11,21 is enumerated as after：First detecting is logical
Road 11 connects first airflow space 15 with one first opening 19, second detection channel 21 with the connection of one second opening 29 this
One airflow space 25, the aligned in position of first opening 19 is in the position of second opening 29, as shown in Fig. 4 to Figure 10.
Another embodiment for illustrating second pipe fitting 20 is enumerated as after：Second pipe fitting 20 has one second flange 22,
Second flange 22 has a recess 27, and first extension 13 passes through second flange 22 by the recess 27, to avoid this
Second flange 22 interferes first extension 13, as shown in Fig. 5 to 9.
Refer to shown in Figure 11 to Figure 12 and Fig. 3 to Fig. 8, flow sensor of the invention can improve operating space, example
Such as：First extension 13 can connect first pressure detecting pipe 41, and second extension 23 can connect a second pressure and detect
Test tube 42；First extension 13 presss from both sides with second extension 23 by first angle a1, the second angle a2 and the 3rd
Angle a3 can form a flared operating space S；First extension 13 is easily attached or removed by operating space S
The first pressure detects pipe 41, and second extension 23 is easily attached or removed the second pressure by operating space S and detect
Test tube 42；The first angle a1 and second angle a2 is acute angle.The mode of operation of the flow sensor of the present invention is for example but not
It is limited to：First pipe fitting 10 can connect the gas conduit 50 of a patient end, and second pipe fitting 20 can connect a gas feed line
60, first pressure detecting pipe 41 may be connected to a respiratory flow Detecting device 70, the gas with second pressure detecting pipe 42
Feed line 60 may be connected to the respiratory flow Detecting device 70；Wherein the respiratory flow Detecting device 70 is by the first pressure
Detecting pipe 41 can detect the pressure near first opening 19, and the respiratory flow Detecting device 70 is detected by the second pressure and managed
42 can detect the pressure near second opening 29.
Refer to shown in Fig. 1 to Fig. 8, in a second embodiment, flow sensor of the invention include first pipe fitting 10,
Second pipe fitting 20 and the air-flow diaphragm 30；First pipe fitting 10 is approximately identical to preferred embodiment with second pipe fitting 20；Should
Air-flow diaphragm 30 has an incomplete circular line of cut 36 to form the air-flow fin 35, and the part of air-flow fin 35 is connected to
The air-flow diaphragm 30 so that the air-flow fin 35 forms the circular edge 351 of part；Wherein the 1 of first pipe fitting 10 first prolongs
One second extension 23 for stretching pipe 13 and second pipe fitting 20 be located at the side of second pipe fitting 20, and the air-flow diaphragm 30 is located at this
The centre of first detection channel 11 and second detection channel 21, when an air-flow passes through the air-flow diaphragm 30, the air-flow fin
35 two sides can form a pressure differential, and the circular edge 351 of the part that is formed of the air-flow fin 35 can reduce the air-flow
Produce the probability of sinuous flow.
The positioning method for illustrating first pipe fitting 10, second pipe fitting 20 and the air-flow diaphragm 30 is enumerated as after：This first
Flange 12 has plural positioning hole 121, and second flange 22 has plural locating dowel 221, each locating dowel of second flange 22
221 are securable to each positioning hole 121 of first flange 12, to increase the polarization of first flange 12 and second flange 22
And stationarity.Furthermore the air-flow diaphragm 30 further has plural location division 32, and each locating dowel 221 of second flange 22 can
Each location division 32 of the air-flow diaphragm 30 is fixed, to increase the polarization of the air-flow diaphragm 30 and stationarity.
Enumerate and illustrate first pipe fitting 10 with the variation pattern of second pipe fitting 20 as after：First pipe fitting 10 has one the
One connecting portion 18, an internal diameter 18a of the first connecting portion 18 are less than an internal diameter 12a of first flange 12, the first connecting portion
18 inside has a longitudinal stop piece 18b, and the air-flow diaphragm 30 is destroyed to prevent foreign matter from stretching into first pipe fitting 10；This
Two pipe fittings 20 have a second connecting portion 28, and an internal diameter 28a of the second connecting portion 28 is less than an internal diameter of second flange 22
22a。
Claims (10)
1. a kind of have the flow sensor for simplifying structure, it is characterised in that the flow sensor includes：
One first pipe fitting (10), there is one first detection channel (11) and one first airflow space (15), first detection channel
(11) one first extension (13) is directly connected, first airflow space (15) connects first detection channel (11), and this first
Detection channel (11) is shaped on first pipe fitting (10) with first extension (13)；
One second pipe fitting (20), there is one second detection channel (21) and one second airflow space (25), second detection channel
(21) one second extension (23) is connected, second airflow space (25) connects second detection channel (21), second detecting
Passage (21) is shaped on second pipe fitting (20) with second extension (23), and second pipe fitting (20) sealing combines should
First pipe fitting (10) so that second airflow space (25) connects first airflow space (15), and second detection channel
(21) second extension (23) can be connected；
One air-flow diaphragm (30), has an air-flow fin (35), the air-flow diaphragm (30) be located at first detection channel (11) with
The centre of second detection channel (21), when an air-flow passes through air-flow diaphragm (30), two sides of the air-flow fin (35)
A pressure differential can be formed；
Wherein first extension (13) is located at the side of second pipe fitting (20) with second extension (23), first extension
The central shaft (c1) for managing (13) and first pipe fitting (10) forms one first angle (a1), second extension (23) with this second
The central shaft (c2) of pipe fitting (20) forms one second angle (a2), first extension (13) and second extension (23) formation
One the 3rd angle (a3), second detection channel (21) form a turning part (231) with second extension (23).
2. there is the flow sensor for simplifying structure according to claim 1, it is characterised in that first pipe fitting (10) has
One first flange (12), first flange (12) have a first lug (14), and first extension (13) is first convex through this
Ear (14) and form a convex portion (131), first detection channel (11) is connected in line with first extension (13).
3. there is the flow sensor for simplifying structure according to claim 2, it is characterised in that second pipe fitting (20) has
One second flange (22), second flange (22) have one second lug (26), and the turning part (231) is in second lug (26)
One through hole of upper formation (261)；First flange (12) has one the 3rd lug (16), and the 3rd lug (16) can close the through hole
(261) so that second detection channel (21) connects second extension (23).
4. there is the flow sensor for simplifying structure according to claim 3, it is characterised in that the 3rd lug (16) has
One groove (161), the position correspondence of the through hole (261) is in the position of the groove (161).
5. there is the flow sensor for simplifying structure according to claim 1, it is characterised in that first detection channel (11)
First airflow space (15) is connected with one first opening (19), second detection channel (21) is connected with one second opening (29)
First airflow space (25), the aligned in position of first opening (19) is in the position of second opening (29)；First pipe fitting
(10) there is one first flange (12), second pipe fitting (20) has one second flange (22), and second flange (22) has one
Recess (27), first extension (13) pass through second flange (22) by the recess (27).
6. there is the flow sensor for simplifying structure according to claim 1, it is characterised in that first extension (13) can
First pressure detecting pipe (41) is connected, and second extension (23) can connect second pressure detecting pipe (42)；This first
Extension (13) is with second extension (23) by first angle (a1), second angle (a2) and the 3rd angle (a3)
A flared operating space (S) can be formed；First extension (13) is easily attached or moved by the operating space (S)
Except the first pressure detects pipe (41), second extension (23) be easily attached or remove by the operating space (S) this
Two pressure detection pipes (42)；First angle (a1) and second angle (a2) are acute angles.
7. a kind of have the flow sensor for simplifying structure, it is characterised in that the flow sensor includes：
One first pipe fitting (10), there is one first detection channel (11) and one first airflow space (15), first detection channel
(11) one first extension (13) is directly connected, first airflow space (15) connects first detection channel (11), and this first
Detection channel (11) is shaped on first pipe fitting (10) with first extension (13)；
One second pipe fitting (20), there is one second detection channel (21) and one second airflow space (25), second detection channel
(21) one second extension (23) is connected, second airflow space (25) connects second detection channel (21), second detecting
Passage (21) is shaped on second pipe fitting (20) with second extension (23), and second pipe fitting (20) sealing combines should
First pipe fitting (10) so that second airflow space (25) connects first airflow space (15), and second detection channel
(21) second extension (23) can be connected；
There is an incomplete circular line of cut (36) to form an air-flow fin for one air-flow diaphragm (30), the air-flow diaphragm (30)
(35), the air-flow fin (35) is partly connected to the air-flow diaphragm (30) so that the air-flow fin (35) forms part circle
Edge (351)；
Wherein first extension (13) is located at the side of second pipe fitting (20), the air-flow diaphragm with second extension (23)
(30) positioned at the centre of first detection channel (11) and second detection channel (21), when an air-flow passes through the air-flow diaphragm
(30) when, two sides of the air-flow fin (35) can form a pressure differential, the part circle that the air-flow fin (35) is formed
Edge (351) can reduce the probability that the air-flow produces sinuous flow.
8. there is the flow sensor for simplifying structure according to claim 7, it is characterised in that first pipe fitting (10) has
One first flange (12), first flange (12) have a first lug (14), and first extension (13) is first convex through this
Ear (14) and form a convex portion (131), first detection channel (11) is connected in line with first extension (13)；This
Two pipe fittings (20) have one second flange (22), and second flange (22) has one second lug (26), and the turning part (231) exists
A through hole (261) is formed on second lug (26)；First flange (12) has one the 3rd lug (16), the 3rd lug
(16) through hole (261) can be closed；3rd lug (16) has a groove (161), and the position correspondence of the through hole (261) is in this
The position of groove (161).
9. there is the flow sensor for simplifying structure according to claim 8, it is characterised in that first flange (12) has
Plural positioning hole (121), second flange (22) have plural locating dowel (221), each locating dowel of second flange (22)
(221) it is securable to each positioning hole (121) of first flange (12)；The air-flow diaphragm (30) further has plural location division
(32), each locating dowel (221) of second flange (22) can fix each location division (32) of the air-flow diaphragm (30).
10. there is the flow sensor for simplifying structure according to claim 8, it is characterised in that first pipe fitting (10) has
There is a first connecting portion (18), an internal diameter (18a) for the first connecting portion (18) is less than an internal diameter of first flange (12)
(12a), an inside of the first connecting portion (18) have a longitudinal stop piece (18b)；Second pipe fitting (20) has one second
Connecting portion (28), an internal diameter (28a) for the second connecting portion (28) are less than an internal diameter (22a) for second flange (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106112506 | 2017-04-14 | ||
| TW106112506A TWI621836B (en) | 2017-04-14 | 2017-04-14 | Flow sensor having a simplified structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107490407A true CN107490407A (en) | 2017-12-19 |
| CN107490407B CN107490407B (en) | 2020-01-21 |
Family
ID=60643321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710291079.1A Active CN107490407B (en) | 2017-04-14 | 2017-04-27 | Flow sensor with simplified structure |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107490407B (en) |
| DE (1) | DE102017109725B4 (en) |
| TW (1) | TWI621836B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102017109725B4 (en) | 2024-04-04 |
| TW201837429A (en) | 2018-10-16 |
| DE102017109725A1 (en) | 2018-10-18 |
| CN107490407B (en) | 2020-01-21 |
| TWI621836B (en) | 2018-04-21 |
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