CN205831792U - Peak flow meter with pressure differential monitoring - Google Patents
Peak flow meter with pressure differential monitoring Download PDFInfo
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- CN205831792U CN205831792U CN201620345167.6U CN201620345167U CN205831792U CN 205831792 U CN205831792 U CN 205831792U CN 201620345167 U CN201620345167 U CN 201620345167U CN 205831792 U CN205831792 U CN 205831792U
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Abstract
The utility model discloses the peak flow meter of a kind of pressure differential monitoring, including casing, valve head, shunting plug, valve and mainboard, this valve head is located at one end of casing, shunting plug and valve are located in this valve head, and mainboard is located in casing, and this valve is provided with pressure port, this mainboard connects a pressure transducer, being provided with a leather hose between pressure port and the pressure transducer of this valve, the pressure in pressure port is sent in differential pressure pickup by leather hose, calculates peak expiratory flow by mainboard.This utility model is due to without spring or other movable parts, decrease because of material and manufacture the error produced, the impact of monitoring accuracy pressure difference sensor, thus measuring accuracy (trueness error caused because of this utility model reasons in structure in addition to differential pressure pickup close to 0) can be improved.Further, this utility model volume is little, can be easy to carry use.
Description
Technical field
This utility model relates to a kind of medical exhalation flow rate instrument, particularly relates to the peak velocity of a kind of pressure differential monitoring
Instrument.
Background technology
Respiratory system disease patient particularly asthmatic patient, in diagnosis and therapeutic process, often needs to measure to exhale
Big flow velocity, in order to the early prevention of disease and Canonical management.At present mainly there are three classes at the peak flow meter applied on the market, one
Class is mechanical type peak flow meter, spring-like scale, promotes buoy to move according to breath pressure and measures.This type of peak flow meter letter
Single easy-to-use, but need user oneself to carry out the record of asthma information.And 87.4% patient can not timely record on request according to statistics.
The most nonstandard management is unfavorable for symptom management, too increases medical treatment cost simultaneously；One class is vane type (turbine type) electricity
Sub-peak flow meter, the characteristic that it is directly proportional according to velocity of rotation and the fluid velocity of rotatable parts measures.Used owing to rotating
Property with the factor such as bearing frictional torque, sensor accuracy can be affected, need to compensate to can be only achieved required precision, measurement data
The most not accurate enough；Also having a class is electronic type peak flow meter, can automatically record the breathing situation of patient, but by its result shadow
Ringing, its measuring accuracy also can only achieve 10%, thus affects elimination data monitoring.It addition, also have some users to use flow sensing
Device is monitored, but due to prior art, flow transducer volume is big, the most portable.
In view of this, the design people for above-mentioned peak flow meter structure design on do not attain perfect caused many disappearances and
Inconvenience, and deeply conceive, and actively research improvement has a fling at and develops and design this utility model.
Utility model content
The purpose of this utility model is to provide a kind of monitoring accuracy high, and volume is little, with the peak flow meter of pressure differential monitoring.
In order to reach above-mentioned purpose, solution of the present utility model is:
The peak flow meter of a kind of pressure differential monitoring, it includes casing, valve head, shunting plug, valve and mainboard, and this valve head sets
In one end of casing, shunting plug and valve are located at this valve head, mainboard is located in casing, and this valve is provided with pressure port, and this is main
Plate connects a pressure transducer, is provided with a leather hose between pressure port and the pressure transducer of this valve, and leather hose is by pressure port
Pressure is sent in differential pressure pickup, calculates peak expiratory flow by mainboard.
Described mainboard is provided with display screen, and the calculating of described mainboard is according to engineering fluid mechanics formula: Q=μ * A* (2*P/
ρ) ^0.5, wherein:
Q is flow, and unit is m^/S；
μ is discharge coefficient, and it is relevant with the shape of valve or pipe；
A is area, and unit is m^2；
P is by the pressure differential before and after valve, and unit is Pa；ρ is the density of fluid, and unit is Kg/m^3；
Calculated the flow of exhaled gas by above-mentioned formula, then take maximum, draw described peak expiratory flow, this expiration
Peak flow is shown on this display screen.
Multiple steam vent it is additionally provided with in described valve.
Described casing includes front cover and rear chassis, and front cover is involutory with rear chassis, this front cover and machine
Being provided with plate between shell bonnet, in this, plate is matched with the bottom of described valve, the pressure port of this valve and setting on plate in this
One transmission post connect, one end of described leather hose connects the transmission post of plate in this, and the other end is connected with differential pressure pickup.
Described valve head includes valve head protecgulum and valve head bonnet, and this valve head protecgulum, shunting plug, valve and valve head bonnet sequentially connect
Being connected together, shunting plug and valve are located in valve head protecgulum and valve head bonnet, and described front cover, middle plate and rear chassis are sequentially
Linking together, the breach of this valve head of cooperation, this valve head protecgulum and valve are formed on the top of front cover, middle plate and rear chassis
It is matched with in this breach after head bonnet combination.
Described mainboard is provided with multiple button, and described front cover is provided with the display mouth of corresponding mainboard display screen, this casing
Protecgulum is provided with the button hole of multiple corresponding mainboard button, and by multiple buttons through the button hole of front cover and pressing of mainboard
Button is connected.
Be combined with a face glass covering described display mouth on described front cover, this face glass be provided with multiple by
Keyhole, one end of the plurality of button is stretched out on this face glass.
After using said structure, the peak flow meter of this utility model pressure differential monitoring and existing peak flow meter structure phase
Relatively, owing to without spring or other movable parts, decreasing because of material and manufacturing the error produced, monitoring accuracy pressure difference senses
The impact of device, thus the measuring accuracy (precision caused because of this utility model reasons in structure in addition to differential pressure pickup can be improved
Error is close to 0).Further, this utility model volume is little, can be easy to carry use.
Accompanying drawing explanation
Fig. 1 is decomposing schematic representation of the present utility model.
Fig. 2 is the decomposing schematic representation of this utility model other direction.
Fig. 3 is constitutional diagram of the present utility model.
Fig. 4 is sectional view of the present utility model.
Detailed description of the invention
In order to the technical solution of the utility model is explained further, below by specific embodiment, this utility model is entered
Row elaborates.
As shown in Figures 1 to 4, this utility model is the peak flow meter of a kind of pressure differential monitoring, and it includes casing 1, valve
2, shunting plug 3, valve 4, mainboard 5, differential pressure pickup 6 and leather hose 7.
This casing 1 is made up of front cover 11, middle plate 12 and rear chassis 13, described front cover 11, middle plate 12 and
Rear chassis 13 sequentially snaps together, and middle plate 12 is located in this front cover 11 and rear chassis 13.This front cover 11, in
The top of plate 12 and rear chassis 13 is respectively equipped with a breach 14 arranged for described valve head 2.Before described mainboard 5 is located at this casing
Between lid 11 and middle plate 12, this mainboard 5 is connected with described differential pressure pickup 6, and one end that mainboard 5 is adjacent with front cover 11 is provided with
One display screen 51, is provided with multiple button 52 below the display screen 51 of mainboard 5, the position of the corresponding display screen 51 of this front cover 11 sets
Having a display mouth 111, this front cover 11 is provided with multiple button hole 112 passed for button 8 in the lower section of display mouth 111, should
Being combined with a face glass 9 covering described breach on front cover 11, this face glass 9 is provided with multiple key hole 91, institute
The key hole 91 of this face glass 9 is stretched out in the one end stating multiple button 8, and the other end of each button 8 is joined with the button 52 of mainboard 5
Close.
Described valve head 2 include can be involutory valve head protecgulum 21 and valve head bonnet 22, this valve head protecgulum 21, shunting plug 3, valve
4 and valve head bonnet 22 sequentially link together, shunting plug 3 and valve 4 are positioned at this valve head protecgulum 21 and valve head bonnet 22, this valve
It is matched with in the breach 14 of this casing 1 after head protecgulum 21 and valve head bonnet 22 combination.
Have a pressure port 41 on described valve 4, pressure port 41 be formed around multiple steam vent 42, the end of this valve 4
Portion is correspondingly arranged on the breach 14 of middle plate 12 formation of described casing 1, the pressure port 41 of this valve 4 and the biography of setting on middle plate 12
Sending post 121 one end to connect, the other end transmitting post 121 is connected with one end of described leather hose 7, the other end of leather hose 7 and described pressure
Gap sensor 6 connects.
User is when exhaling, and gas passes through valve head protecgulum 21, shunting plug 3 and valve 4 time, produce an air pressure, this gas
Press the gap middle with shunting plug 3 by valve head protecgulum 21, then by the pressure port 41 on valve 4, the transmission post on middle plate 12
121, through leather hose 7, pressure is sent in differential pressure pickup 6, thus tests out the pressure reduction of air-flow, then by mother board technologies, draw
The peak expiratory flow PEF of demand, lung function parameter conventional in the medical science such as first second expiration amount FEV1.
Wherein, the calculating of mainboard 5 is according to engineering fluid mechanics formula: Q=μ * A* (2*P/ ρ) ^0.5, wherein:
Q is flow, and unit is m^/S；
μ is discharge coefficient, and it is relevant with the shape of valve or pipe；
A is area, and unit is m^2；
P is by the pressure differential before and after valve, and unit is Pa；ρ is the density of fluid, and unit is Kg/m^3；
Calculated the flow of exhaled gas by above-mentioned formula, then take maximum, draw described peak expiratory flow PEF, should
Peak expiratory flow PEF is shown on the display screen of this mainboard 5.User can be by the face glass 9 in front cover 11 front
Directly read this numerical value.
The peak flow meter of this utility model pressure differential monitoring is compared with existing peak flow meter structure, due to without spring or
Other movable parts of person, decrease because of material and manufacture the error produced, the impact of monitoring accuracy pressure difference sensor 6, thus
Measuring accuracy (trueness error caused because of this utility model reasons in structure in addition to differential pressure pickup close to 0) can be improved.
Further, this utility model volume is little, can be easy to carry use.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any art
Those of ordinary skill is suitably changed what it did or modifies, and all should be regarded as without departing from patent category of the present utility model.
Claims (7)
1. the peak flow meter with pressure differential monitoring, it is characterised in that: include casing, valve head, shunting plug, valve and mainboard,
This valve head is located at one end of casing, shunting plug and valve and is located in this valve head, and mainboard is located in casing, and this valve is provided with pressure
Hole, this mainboard connects a pressure transducer, is provided with a leather hose between pressure port and the pressure transducer of this valve, and leather hose is by pressure
Pressure in hole is sent in differential pressure pickup, calculates peak expiratory flow by mainboard.
2. as claimed in claim 1 with the peak flow meter of pressure differential monitoring, it is characterised in that: described mainboard is provided with display
Screen, the calculating of described mainboard is according to engineering fluid mechanics formula: Q=μ * A* (2*P/ ρ) ^0.5, wherein:
Q is flow, and unit is m^/S；
μ is discharge coefficient, and it is relevant with the shape of valve or pipe；
A is area, and unit is m^2；
P is by the pressure differential before and after valve, and unit is Pa；
ρ is the density of fluid, and unit is Kg/m^3；
Calculated the flow of exhaled gas by above-mentioned formula, then take maximum, draw described peak expiratory flow, this expiratory gas flow
Peak value is shown on this display screen.
3. as claimed in claim 1 with the peak flow meter of pressure differential monitoring, it is characterised in that: it is additionally provided with multiple in described valve
Steam vent.
4. as claimed in claim 1 with the peak flow meter of pressure differential monitoring, it is characterised in that: described casing includes front cover
And rear chassis, front cover is involutory with rear chassis, is provided with plate between this front cover and rear chassis, and in this, plate is joined
Together in the bottom of described valve, the pressure port of this valve is connected with the transmission post arranged on plate in this, one end of described leather hose
Connecting the transmission post of plate in this, the other end is connected with differential pressure pickup.
5. as claimed in claim 4 with the peak flow meter of pressure differential monitoring, it is characterised in that: described valve head includes valve head protecgulum
And valve head bonnet, this valve head protecgulum, shunting plug, valve and valve head bonnet sequentially link together, and shunting plug and valve are located at valve
In head protecgulum and valve head bonnet, described front cover, middle plate and rear chassis sequentially link together, front cover, middle plate and
The top of rear chassis is matched with this breach after forming the breach of this valve head of cooperation, this valve head protecgulum and the combination of valve head bonnet
In.
6. as claimed in claim 5 with the peak flow meter of pressure differential monitoring, it is characterised in that: described mainboard be provided with multiple by
Button, described front cover is provided with the display mouth of corresponding mainboard display screen, and this front cover is provided with multiple corresponding mainboard button
Button hole, and be connected with the snap fit of mainboard through the button hole of front cover by multiple buttons.
7. as claimed in claim 6 with the peak flow meter of pressure differential monitoring, it is characterised in that: it is combined with on described front cover
One face glass covering described display mouth, this face glass is provided with multiple key hole, and one end of the plurality of button is stretched out
On this face glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620345167.6U CN205831792U (en) | 2016-04-22 | 2016-04-22 | Peak flow meter with pressure differential monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620345167.6U CN205831792U (en) | 2016-04-22 | 2016-04-22 | Peak flow meter with pressure differential monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205831792U true CN205831792U (en) | 2016-12-28 |
Family
ID=57628101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620345167.6U Active CN205831792U (en) | 2016-04-22 | 2016-04-22 | Peak flow meter with pressure differential monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205831792U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114072209A (en) * | 2019-07-05 | 2022-02-18 | 皇家飞利浦有限公司 | Respiration analysis mask and respiration analysis method |
-
2016
- 2016-04-22 CN CN201620345167.6U patent/CN205831792U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114072209A (en) * | 2019-07-05 | 2022-02-18 | 皇家飞利浦有限公司 | Respiration analysis mask and respiration analysis method |
| CN114072209B (en) * | 2019-07-05 | 2024-01-19 | 皇家飞利浦有限公司 | Breath analysis mask and breath analysis method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |