CN219977478U - Laminar flow heat type flowmeter and pulmonary function instrument - Google Patents
Laminar flow heat type flowmeter and pulmonary function instrument Download PDFInfo
- Publication number
- CN219977478U CN219977478U CN202320705150.7U CN202320705150U CN219977478U CN 219977478 U CN219977478 U CN 219977478U CN 202320705150 U CN202320705150 U CN 202320705150U CN 219977478 U CN219977478 U CN 219977478U
- Authority
- CN
- China
- Prior art keywords
- runner
- flow
- laminar flow
- sprue
- laminar
- 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.)
- Active
Links
- 230000009325 pulmonary function Effects 0.000 title claims abstract description 18
- 230000004199 lung function Effects 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000002345 respiratory system Anatomy 0.000 description 3
- 241000700605 Viruses Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 210000003296 saliva Anatomy 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000013123 lung function test Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to a laminar flow heat flowmeter and a pulmonary function instrument, wherein the laminar flow heat flowmeter comprises a main runner, a split runner and a laminar flow member, a split runner inflow port and a split runner outflow port are arranged on the pipe wall of the main runner, the split runner is communicated with the split runner inflow port and the split runner outflow port, a heat flow sensor is arranged in the split runner and used for detecting flow, the laminar flow member is arranged in the main runner, air flow in the main runner circulates through the laminar flow member, and the split runner is detachably connected with the main runner. The utility model realizes the functions of cleaning, sterilizing and replacing the main runner of the lung function instrument through the detachable design of the split runner, and can better protect the use of the thermal flow sensor.
Description
Technical Field
The utility model relates to a flowmeter and a lung function instrument, in particular to a laminar flow heat type flowmeter and a lung function instrument.
Background
A thermal type gas flow meter is a flow meter for measuring a fluid mass flow rate by using a change in a temperature field generated when a fluid flows through a pipe heated by an external heat source or measuring a fluid mass flow rate by using a relation between energy required for a fluid temperature to rise to a certain value when the fluid is heated, and can be used for precisely measuring the flow rates of various gases. In many types of flow testing methods based on different principles, a thermal type gas mass flowmeter adopting a MEMS chip temperature sensor to detect heat is a representative of a new generation of gas flowmeter because of no need of volume-mass conversion, agility of reaction and high precision. Thermal flowmeters are now widely used in many fields, for example in pulmonary function instruments, where they can be used to measure the flow of exhaled air. Pulmonary function machine a device for measuring the amount of air inhaled and exhaled by the lungs is the primary device for basic Pulmonary Function Testing (PFT).
Conventional thermal flow meters mount a sensor chip directly into the respiratory airflow path for measurement, such as the Sendi Vmax 22Iv lung function detector in the United states. Because the gas exhaled by the respiratory tract is moist and more saliva accompanies the human body when the human body exhales, the pipeline quickly generates peculiar smell and breeds bacterial and virus, and the virus and bacteria enter the respiratory tract of the human body along with the inspiration action, so that the retrograde infection of the respiratory tract occurs, and the life is seriously endangered. Meanwhile, saliva exhaled by a human body or particles in the air are easy to attach to a sensor sensitive element, so that the sensor chip is polluted and damaged, and the sensitivity, accuracy and service life of the sensor are reduced.
Disclosure of Invention
The utility model solves the technical problems that: the laminar flow thermal flowmeter and the pulmonary function instrument solve the technical problems that the use effect of a thermal flow sensor is affected and an air flow pipeline is not easy to clean after long-term use by adopting an inherent air flow channel in the prior art.
The technical scheme of the utility model is as follows: the utility model provides a laminar flow thermal flowmeter, includes sprue, subchannel, laminar flow spare, set up runner inflow mouth and runner outflow mouth on the pipe wall of sprue, the runner intercommunication runner inflow mouth with the runner outflow mouth, set up thermal flow sensor in the runner and be used for detecting flow, set up laminar flow spare in the sprue, the air current in the sprue passes through laminar flow spare circulation, the runner with sprue detachable connection.
The utility model further adopts the technical scheme that: the laminar flow member is disposed between the bypass flow inlet and the bypass flow outlet.
The utility model further adopts the technical scheme that: the laminar flow member is formed by a plurality of airflow channels.
The technical scheme of the utility model is as follows: the utility model provides a constitute a lung function appearance, includes lung function mouthpiece, laminar flow heat flowmeter, processor unit, laminar flow heat flowmeter includes sprue, subchannel, laminar flow spare, set up runner inflow mouth and runner outflow mouth on the pipe wall of sprue, the runner intercommunication runner inflow mouth with the runner outflow mouth, set up thermal flow sensor in the subchannel and be used for detecting flow, set up laminar flow spare in the sprue, the air current in the sprue passes through laminar flow spare circulation, the runner with sprue detachable connection, lung function mouthpiece with laminar flow heat flowmeter's sprue input communicates, thermal flow sensor will acquire the air current signal transmission to processor unit, output flow signal after the processor unit handles.
The utility model further adopts the technical scheme that: the communication module is further included, and the flow signal is transmitted to the terminal through the communication module.
The utility model further adopts the technical scheme that: the communication module is any one or more of a Bluetooth module, a serial port communication module, a Wifi module and a 4G module.
The utility model further adopts the technical scheme that: the lung function instrument transmits the flow signal to the mobile phone for processing.
The utility model further adopts the technical scheme that: the lung function instrument transmits the flow signal to a computer for processing.
The utility model has the technical effects that: the utility model provides a establish a laminar flow heat flowmeter and pulmonary function appearance, laminar flow heat flowmeter includes sprue, runner, laminar flow spare, set up runner inflow mouth and runner outflow mouth on the pipe wall of sprue, the runner intercommunication the runner inflow mouth with the runner outflow mouth, set up heat flow sensor in the runner and be used for detecting flow, set up the laminar flow spare in the sprue, the air current in the sprue passes through the laminar flow spare circulation, the runner with the sprue detachable connection. The utility model realizes the functions of cleaning, sterilizing and replacing the main runner of the lung function instrument through the detachable design of the split runner, and can better protect the use of the thermal flow sensor.
Drawings
FIG. 1 is a schematic diagram of a laminar flow thermal flowmeter according to the present utility model.
Fig. 2 is a schematic structural view of the pulmonary function instrument of the present utility model.
Fig. 3 is a schematic diagram of the installation structure of the middle-layer flow heat type flowmeter in the pulmonary function machine.
Detailed Description
The technical scheme of the utility model is further described below by combining specific embodiments.
As shown in fig. 1, the specific embodiment of the present utility model is: the utility model provides a laminar flow thermal flowmeter, includes sprue 1, subchannel 2, laminar flow spare 3, set up subchannel inflow port 11 and runner outflow port 12 on the pipe wall of sprue 1, the bypass 2 intercommunication runner inflow port 11 with runner outflow port 12, set up thermal flow sensor 5 in the bypass 2 and be used for detecting the flow, set up laminar flow spare 3 in the sprue 1, the air current in the sprue 1 passes through laminar flow spare 3 circulates, bypass 2 with sprue 1 detachable connection.
As shown in fig. 1, the specific implementation process of the present utility model is: the air flow enters from the inlet of the main flow channel 1, is split into the split flow channel 2 through the split flow channel inflow port 11, the split flow channel 2 is used for measuring the flow rate through the thermal flow sensor 5, then the split flow channel outflow port 12 is used for outflow, and other air flows in the main flow channel 1 are used for outflow through the laminar flow member 3. The split runner 2 is detachably connected with the main runner 1, specifically, two ends of the split runner 2 are detachably connected with the split runner inflow port 11 and the split runner outflow port 12 respectively, so that the split runner 2 is conveniently taken down, and then the main runner 1 and the main runner 2 are cleaned respectively.
Substituting the relevant calculation parameters into the above formula can obtain:
wherein:
v represents the average flow rate of the fluid in the main flow channel, unit: l/min, v represents the average flow rate of the fluid in the shunt, in units of: l/min; lambda (lambda) z Represents the on-way resistance coefficient lambda in the main runner and the sub-runner m The coefficient of resistance along the way in the sub-runner is represented, L represents the calculated length of the main runner, and the unit is: mm, l represents the calculated length of the subchannel in units of: mm, D represents the inner diameter of the main flow passage in units of: mm, d represents the inner diameter of the subchannel, unit: mm, Σζ z Representing the drag coefficient of the laminar flow element Σζ m The coefficient of resistance of the runner is shown.
The flow rate relationship between the main flow channel and the split flow channel can be deduced by replacing V, v in the formula with the flow rates Q, q of the main flow channel and the split flow channel respectively. And the flow of the main runner can be obtained by measuring the flow of the sub-runner.
The simplification can be obtained:
k is the ratio of the main flow Q to the shunt flow Q, i.e. the flow multiple. The section I-II in the figure is the detachable position of the main runner and the sub-runner.
As shown in fig. 1, a preferred embodiment of the present utility model is: the laminar flow member 3 is disposed between the bypass flow inlet 11 and the bypass flow outlet 12, so that the bypass flow 2 and the main flow passage 1 are connected conveniently, and the air flow of the bypass flow passage 2 no longer passes through the laminar flow member 3.
As shown in fig. 1, a preferred embodiment of the present utility model is: the laminar flow member 4 has a plurality of hole-like structures thereon for the passage of fluid. The laminar flow member 3 is formed of a plurality of air flow passages, and the plurality of air flow passages form the laminar flow member 3, so that the air flow can circulate more uniformly.
As shown in fig. 1, 2 and 3, the specific embodiments of the present utility model are: the utility model provides a constitute a lung function appearance, includes lung function mouthpiece 6, laminar flow heat flowmeter, processor unit 8, laminar flow heat flowmeter includes sprue 1, subchannel 2, laminar flow spare 3, set up subchannel inflow port 11 and runner outflow port 12 on the pipe wall of sprue 1, the shunt 2 intercommunication runner inflow port 11 with the runner outflow port 12, set up hot type flow sensor 5 in the shunt 2 and be used for detecting the flow, set up laminar flow spare 3 in the sprue 1, the air current in the sprue 1 passes through laminar flow spare 3 circulates, subchannel 2 with sprue 1 detachable connection. The lung function mouthpiece 6 is communicated with the input end of the main flow channel 1 of the laminar flow thermal flowmeter, the thermal flow sensor 5 transmits acquired airflow signals to the processor unit 8, and the processor unit 8 outputs flow signals after processing.
As shown in fig. 1, 2 and 3, the specific embodiments of the present utility model are: firstly, a person to be detected exhales through the lung function mouthpiece 6 according to the requirement of the forced breathing standard, and under the condition of ensuring no air leakage, the air flow can pass through the laminar flow thermal flowmeter with the linear relation between the air flow and the pressure difference. The laminar flow thermal flowmeter is connected with a flow detection end of the thermal flow sensor 5 through a flow dividing hole, and a flow signal is input into the thermal flow sensor 5 through the detection end. The thermal flow sensor 5 then transmits the flow signal to the processor unit 8, and the processor unit 8 collects the analog voltage signal through its built-in analog-to-digital conversion module, and performs analog-to-digital conversion to a digital signal. After the digital voltage signal is processed to meet the communication format, the communication module transmitting end transmits information to the receiving end. After receiving the signal, the host computer converts the signal into serial data which can be recognized by the smart phone (or the computer) through signal processing and is received. And decoding the obtained data by the APP in the smart phone or software in the computer according to a pre-designed data packet format, and extracting the digital flow signals in the data. And (3) converting the digital flow signal into a corresponding forced expiration signal through a proper algorithm of calibration experiment design. According to the requirements of lung function detection, an algorithm in the APP calculates various results of the forced expiration signal and draws a related image. The detection result is displayed to the user through the display screen of the mobile phone/computer, and the detection result can be stored in the cloud or transmitted to a doctor or a hospital through the network connection function, so that the lung function is detected. In the detection process, gas enters the fluid pipeline 2 from the lung function mouthpiece 1, pressure drop difference is formed at two sides of the laminar flow piece 4 due to the influence of the blocking force when passing through the laminar flow piece 4, and the human breathing gas flow data can be obtained by detecting the gas flow of the sub-flow channel 2. After the lung function test of the user is finished, the user can separate the parts of the lung function mouthpiece 6, the main runner 1 and the shunt runner 2, clean and disinfect the lung function mouthpiece 6 and the main runner 1, and replace the lung function mouthpiece 6 and the main runner 1 after a period of use.
As shown in fig. 1, 2 and 3, the preferred embodiments of the present utility model are: the communication module is also included, and the flow signal is transmitted to other terminals through the communication module. The terminal may be one or more of a mobile phone or a computer. The communication module is any one or more of a Bluetooth module, a serial port communication module, a Wifi module and a 4G module.
As shown in fig. 1, 2 and 3, the preferred embodiments of the present utility model are: the inner wall of the shunt flow inlet 11 has a certain taper and is connected with the outer wall of the pulmonary function mouthpiece 1, and the fluid detection device comprises a base 17, a shunt 2 and a processor unit 8. The split runner comprises an upper cover plate 13 and a lower cover plate 14, and the split runner 2 is fixed on the split runner inflow port 11 and the split runner outflow port 12 of the base 7 through a buckle 16. A groove 15 is arranged in the middle of the runner upper cover plate 13 and is used for placing the thermal flow sensor 5.
The utility model has the technical effects that: the utility model provides a constitute a laminar flow heat flowmeter and pulmonary function appearance, provides a laminar flow heat flowmeter, including sprue 1, subchannel 2, laminar flow spare 3, set up subchannel inflow port 11 and runner outflow port 12 on the pipe wall of sprue 1, the bypass 2 intercommunication runner inflow port 11 with runner outflow port 12, set up thermal flow sensor 5 in the bypass 2 and be used for detecting the flow, set up laminar flow spare 3 in the sprue 1, the air current in the sprue 1 passes through laminar flow spare 3 circulates, bypass 2 with sprue 1 detachable connection. The utility model realizes the functions of cleaning, sterilizing and replacing the main runner of the lung function instrument through the detachable design of the split runner, and can better protect the use of the thermal flow sensor.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (8)
1. The utility model provides a laminar flow heat flowmeter, its characterized in that includes sprue, subchannel, laminar flow spare, set up runner inflow mouth and runner outflow mouth on the pipe wall of sprue, the runner intercommunication the runner inflow mouth with the runner outflow mouth, set up the hot type flow sensor in the subchannel and be used for detecting the flow, set up laminar flow spare in the sprue, the air current in the sprue passes through laminar flow spare circulation, the runner with the sprue detachable connection.
2. The laminar flow thermal flow meter according to claim 1, characterized in that said detachable laminar flow member is arranged between said bypass flow inlet and said bypass flow outlet.
3. The laminar flow thermal flow meter according to claim 1, characterized in that said laminar flow member is formed by a plurality of air flow channels.
4. The utility model provides a lung function appearance, its characterized in that includes lung function mouthpiece, laminar flow heat flowmeter, processor unit, laminar flow heat flowmeter includes sprue, runner, laminar flow spare, set up runner inflow mouth and runner outflow mouth on the pipe wall of sprue, the runner intercommunication the runner inflow mouth with the runner outflow mouth sets up thermal flow sensor in the runner and is used for detecting flow, set up laminar flow spare in the sprue, the air current in the sprue passes through laminar flow spare circulation, the runner with the sprue is detachable to be connected, lung function mouthpiece with laminar flow heat flowmeter's sprue input communicates, thermal flow sensor will acquire the air current signal transmission to processor unit, output flow signal after the processor unit handles.
5. The pulmonary function machine of claim 4, further comprising a communication module through which the flow signal is transmitted to a terminal.
6. The pulmonary function instrument according to claim 5, wherein the communication module is any one or more of a bluetooth module, a serial communication, a Wifi module, or a 4G module.
7. The pulmonary function machine of claim 5, wherein the pulmonary function machine transmits the flow signal to a cell phone for processing.
8. The pulmonary function machine of claim 5, wherein the pulmonary function machine transmits the flow signal to a computer for processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320705150.7U CN219977478U (en) | 2023-03-31 | 2023-03-31 | Laminar flow heat type flowmeter and pulmonary function instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320705150.7U CN219977478U (en) | 2023-03-31 | 2023-03-31 | Laminar flow heat type flowmeter and pulmonary function instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219977478U true CN219977478U (en) | 2023-11-07 |
Family
ID=88589691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320705150.7U Active CN219977478U (en) | 2023-03-31 | 2023-03-31 | Laminar flow heat type flowmeter and pulmonary function instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219977478U (en) |
-
2023
- 2023-03-31 CN CN202320705150.7U patent/CN219977478U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5676132A (en) | Pulmonary interface system | |
| CN102114290B (en) | Method, device and system for detecting breathing machine | |
| CN103747730A (en) | End-tidal gas monitoring apparatus | |
| US20110125045A1 (en) | Spirometer with replaceable flow tube | |
| CN113301844A (en) | Self-contained wearable metabolic analyzer | |
| CN208988880U (en) | A kind of cardiopulmonary exercise evaluating system | |
| CN105769200A (en) | Wearable human respiration measuring system and method | |
| EP3243046A1 (en) | A flow meter | |
| KR101703971B1 (en) | Portable bidirectional spirometer apparatus and method thereof | |
| CN219977478U (en) | Laminar flow heat type flowmeter and pulmonary function instrument | |
| CN110958855B (en) | Flow sensing device for a spirometer and method thereof | |
| US10945636B2 (en) | Temperature based respiratory detection | |
| CN108671344A (en) | A kind of number oxygen quality flow inhalator | |
| CN208809253U (en) | A kind of number oxygen quality flow inhalator | |
| CN107219333B (en) | Exhaled gas detection system and detection method | |
| CN212650828U (en) | Portable nasal respiration function detection device | |
| CN113080934A (en) | Real-time monitoring device for oxygen consumption and carbon dioxide production of underwater closed respirator | |
| CN202920185U (en) | Breath heat-measuring apparatus of livestock open-type mask | |
| KR20110021055A (en) | Method for electronic spirometer using rate of flow-air and system for performing the same | |
| CN111238581A (en) | Peripheral sampling differential pressure sensor for gas flow collection | |
| CN113749640A (en) | Portable nasal respiration function detection device | |
| US20210007628A1 (en) | Portable spirometer | |
| CN217132895U (en) | Mask sealing performance detection device | |
| KR102591250B1 (en) | nasal breathing test device | |
| GB2622101A (en) | Pitot tube for measuring high and low respiratory flow rates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |