CN112504361A - A miniature differential pressure formula flow sensor for detecting nose flow - Google Patents

A miniature differential pressure formula flow sensor for detecting nose flow Download PDF

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Publication number
CN112504361A
CN112504361A CN202011484253.2A CN202011484253A CN112504361A CN 112504361 A CN112504361 A CN 112504361A CN 202011484253 A CN202011484253 A CN 202011484253A CN 112504361 A CN112504361 A CN 112504361A
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China
Prior art keywords
structure body
cylindrical structure
nasal
joint
differential pressure
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CN202011484253.2A
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Inventor
潘劲松
刘妍妍
王征
聂旭东
李焰
贾春红
丁宇豪
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Anhui Zhongke Medical Equipment Co ltd
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Anhui Zhongke Medical Equipment Co ltd
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Priority to CN202011484253.2A priority Critical patent/CN112504361A/en
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    • 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
    • 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
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12—Cleaning arrangements; Filters
    • G01F15/125—Filters

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Physiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The invention discloses a miniature differential pressure type flow sensor for detecting nasal flow, and relates to the technical field of sensors for nasal resistance meters. The conical structure body is clamped with the upper end of the cylindrical structure body through a buckle, the upper end of the conical structure body is connected with the nasal olive head into a whole, an inner cavity of the conical structure body is communicated with a through hole in the middle of the nasal olive head, and filter cotton is arranged at the joint of the conical structure body and the cylindrical structure body; a baffle plate with a through hole is arranged in the middle of the inner cavity of the cylindrical structure body, and the baffle plate is parallel to the opening of the cylindrical structure body; the upper part of one side of the cylindrical structure body is provided with a joint, the joint is vertical to the length direction of the cylindrical structure body, and a through hole in the joint is communicated with the inner cavity of the cylindrical structure body. The invention has smaller volume, more accurate, concise and convenient pressure measurement, is suitable for measuring the nasal flow and meets the requirements on the nasal flow detection with high precision, low range and small noise; the installation is simple, adds removable filter pulp, effectively prevents cross infection and dust foreign matter.

Description

A miniature differential pressure formula flow sensor for detecting nose flow
Technical Field
The invention relates to the technical field of sensors for a nasal resistance meter, in particular to a miniature differential pressure type flow sensor for detecting nasal flow.
Background
The latest is the differential pressure type flow sensor used for collecting the nasal respiratory flow on the model NR6 nasal resistance meter of Gimm corporation in England. A throttling device is arranged on the gas flow tube, a breathable film is arranged on the throttling device, and gas stably flows forwards in front of the breathable film. When gas flows through the gas permeable membrane, a stable flow state is broken due to the reduction of the pore size and the contraction of the cross-sectional area, so that the flow rate will be changed, the speed will be increased, the static pressure of the gas will be reduced, and thus the pressure before and after the gas permeable membrane will be decreased. A pressure difference is formed (the pressure in the front part of the breathable film is large and the pressure in the rear part of the breathable film is small). Then the differential pressure is collected by a differential pressure sensor, and the flow rate is in direct proportion to the square root of the differential pressure
Figure BDA0002838899780000011
Thereby measuring the flow rate during nasal breathing.
However, the prior art has the following disadvantages:
the existing flowmeter has larger volume, cannot be integrated in smaller equipment with complex functions, and is inconvenient to use;
secondly, the existing flow meter for detecting the nasal flow adopts a ventilation film mode, and air impurities are attached during detection, so that the risk of accuracy reduction after long-term use is caused;
the existing flow meter has a large measuring range and cannot meet the requirements of high precision, low measuring range and low noise for detecting the nasal flow.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a miniature differential pressure type flow sensor for detecting nasal flow, which aims to solve the problems that the existing flow meter in the background technology has larger volume, cannot be integrated in smaller equipment with complex functions and is inconvenient to use; dust adsorption causes a decrease in accuracy; the measuring range is large, and the requirements for high-precision, low-measuring-range and low-noise nasal flow detection cannot be met.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a miniature differential pressure formula flow sensor for detecting nasal flow, it contains toper structure and cylinder structure, the toper structure passes through the upper end joint of buckle with the cylinder structure, and toper structure upper end and nose olive head are even as an organic whole.
As a further improvement of the invention, the inner cavity of the conical structure is communicated with the through hole in the middle of the nose olive head.
As a further improvement of the invention, an annular end vertically extends downwards from the bottom of the conical structure, a pair of clamping grooves are arranged on the annular end, and an annular clamping groove is arranged on the inner wall of the annular end.
As a further improvement of the invention, the cylindrical structure body is a cylindrical structure with the upper end and the lower end not closed, the upper end of the cylindrical structure body is provided with a boss, the boss is provided with a pair of buckles corresponding to the clamping grooves, the conical structure body and the cylindrical structure body are clamped and connected through the clamping grooves and the buckles, the joint of the conical structure body and the cylindrical structure body is provided with filter cotton, and the filter cotton is accommodated in the annular clamping groove.
As a further improvement of the invention, a baffle plate with a through hole is arranged in the middle of the inner cavity of the cylindrical structure body, and the baffle plate is parallel to the opening of the cylindrical structure body; the upper portion of one side of the cylindrical structure body is provided with a joint, the joint is perpendicular to the length direction of the cylindrical structure body, a through hole in the joint is communicated with the inner cavity of the cylindrical structure body, and the joint is arranged between the filter cotton and the baffle.
As a further improvement of the invention, the joint is connected to the instrument main unit through a hose.
(III) advantageous effects
Compared with the prior art, after the technical scheme is adopted, the invention has the beneficial effects that:
the invention adopts a special structure cone shape, and has small volume and simple installation;
the replaceable filter cotton is added, so that the risk caused by cross infection and the entry of dust and foreign matters is effectively prevented;
the nasal flow meter is small in size and small in range, one end of the nasal flow meter is used for measuring the nasal pressure, the other end of the nasal flow meter is connected with the atmospheric pressure, the pressure measurement is accurate, concise and convenient, the nasal flow meter is suitable for measuring the nasal flow, and the requirements for detecting the nasal flow with high precision, low range and low noise are met;
the invention has simple structure, adopts the design of the nasal olive head and the cone shape on the upper part, has changeable size of the nasal olive head, is suitable for the noses of different ages and different sizes, and can be attached to the nostrils on one hand and avoid the condition of uneven flow on the two sides with large middle.
Drawings
FIG. 1 is a schematic structural diagram of a conical structure according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cylindrical structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the assembled embodiment of the present invention;
FIG. 4 is an exploded view of an embodiment of the present invention;
description of reference numerals:
1. a nasal olive head; 2. an annular neck; 3. a card slot; 4. filtering cotton; 5. buckling; 6. a cylindrical joint; 7. a baffle plate; 8. a tapered structure; 9. a cylindrical structural body; 10. and (4) a boss.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown: a miniature differential pressure type flow sensor for detecting nasal flow comprises a nasal olive head 1, an annular clamping groove 2, a clamping groove 3, filter cotton 4, a buckle 5, a cylindrical joint 6, a baffle 7, a conical structural body 8, a cylindrical structural body 9 and a boss 10, wherein the upper end of the conical structural body 8 is connected with the nasal olive head 1 into a whole, and an internal cavity of the conical structural body 8 is communicated with a through hole in the middle of the nasal olive head 1; an annular end vertically extends downwards from the bottom of the conical structure body 8, a pair of clamping grooves 3 are formed in the annular end, and an annular clamping groove 2 is formed in the inner wall of the annular end; the cylindrical structure body 9 is a cylindrical structure with the upper end and the lower end not closed, a boss 10 is arranged at the upper end of the cylindrical structure body, a pair of buckles 5 corresponding to the clamping grooves 3 are arranged on the boss 10, the conical structure body 8 and the cylindrical structure body 9 are clamped with the buckles 5 through the clamping grooves 3, filter cotton 4 is arranged at the joint of the conical structure body 8 and the cylindrical structure body 9, the filter cotton 4 is accommodated in the annular clamping groove 2, and the filter cotton 4 can be replaced. A baffle 7 with a through hole is arranged in the middle of the inner cavity of the cylindrical structure body 9, and the baffle 7 is parallel to the opening of the cylindrical structure body 9; cylindrical joint 6 is provided with on one side upper portion of cylindrical structure 9, and cylindrical joint 6 is perpendicular with cylindrical structure 9's length direction, and the through-hole of cylindrical joint 6 inside communicates with cylindrical structure 9's inner chamber, and cylindrical joint 6 sets up between filter pulp 4 and baffle 7, and cylindrical joint 6 is connected to the instrument host through the hose.
The principle of the embodiment is as follows:
firstly, as shown in fig. 1, the uppermost olive nose head 1 is olive-shaped, which can ensure that the nostril of the person to be detected can be completely plugged, the inner side of the olive nose head 1 adopts a straight pipeline type, and the exhaled air can directly enter along with the nasal cavity. The cone-shaped structure body 8 is arranged below the nasal olive head 1, so that exhaled air cannot directly flow in like other flow collection structures, flow is concentrated in the middle, partial flow can flow downwards along the cone-shaped structure body through the cone-shaped structure body 8, and the phenomenon of uneven collection caused by flow concentration is avoided. The bottom of the conical structure body 8 is provided with the annular clamping groove 2, so that a piece of filter cotton 4 can be just placed in the annular clamping groove, and the design is favorable for preventing cross infection among patients.
Secondly, as shown in fig. 2, the lower part of the present embodiment is designed as a simple cylindrical structure 9, a cylindrical joint 6 is embedded in the lower part of the filter cotton 4, and the cylindrical joint 6 is connected with a hose for collecting partial flow and is connected with an instrument host. The middle part is provided with a baffle 7, the middle of the baffle 7 is provided with a small hole, and the lowest part of the cylindrical structure body 9 is directly hollowed out.
Finally, the joint of the conical structural body 8 and the cylindrical structural body 9 is in a clamping design, a pair of clamping grooves 3 is formed in the annular end below the conical structural body 8, a pair of buckles 5 are arranged outside a boss 10 at the upper end of the cylindrical structural body 9, the buckles 5 are sleeved into the clamping grooves 3, and the installation can be achieved by slightly twisting after the buckles are closed. The conical structural body 8 and the cylindrical structural body 9 can be separated by twisting in the opposite direction, so that the filter cotton 4 can be disassembled and replaced.
In the embodiment, the stable flowing gas pressure value flowing through the conical structural body 8 in front of the baffle 7 is measured through the hose, a pressure difference is formed between the stable flowing gas pressure value and the atmospheric pressure, and the flow rate is in direct proportion to the square root of the pressure difference, so that the flow rate during nasal breathing is obtained through a built-in sensor of the main machine.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The utility model provides a miniature differential pressure formula flow sensor for detecting nasal flow which characterized in that, it contains toper structure and cylinder structure, the toper structure passes through the upper end joint of buckle with cylinder structure, and toper structure upper end and nose olive head are even as an organic whole.
2. The micro differential pressure flow sensor for detecting nasal flow according to claim 1, wherein the internal cavity of the conical structure is in communication with a through hole in the middle of the nasal olive head.
3. The micro differential pressure type flow sensor for detecting the nasal flow according to claim 1, wherein an annular end is vertically extended downwards from the bottom of the conical structure, a pair of clamping grooves are arranged on the annular end, and an annular clamping groove is arranged on the inner wall of the annular end.
4. The micro differential pressure type flow sensor for detecting the nasal flow according to claim 1, wherein the cylindrical structure body is a cylindrical structure with the upper end and the lower end not closed, a boss is arranged at the upper end of the cylindrical structure body, a pair of buckles corresponding to the clamping grooves are arranged on the boss, the conical structure body and the cylindrical structure body are clamped through the clamping grooves and the buckles, filter cotton is arranged at the joint of the conical structure body and the cylindrical structure body, and the filter cotton is accommodated in the annular clamping grooves.
5. The micro differential pressure type flow sensor for detecting the nasal flow according to claim 1, wherein a baffle plate with a through hole is arranged in the middle of the inner cavity of the cylindrical structure body, and the baffle plate is parallel to the opening of the cylindrical structure body; the upper portion of one side of the cylindrical structure body is provided with a joint, the joint is perpendicular to the length direction of the cylindrical structure body, a through hole in the joint is communicated with the inner cavity of the cylindrical structure body, and the joint is arranged between the filter cotton and the baffle.
6. The miniature differential pressure flow sensor for sensing nasal flow of claim 1, wherein the connector is connected to an instrument host via a hose.
CN202011484253.2A 2020-12-16 2020-12-16 A miniature differential pressure formula flow sensor for detecting nose flow Pending CN112504361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011484253.2A CN112504361A (en) 2020-12-16 2020-12-16 A miniature differential pressure formula flow sensor for detecting nose flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011484253.2A CN112504361A (en) 2020-12-16 2020-12-16 A miniature differential pressure formula flow sensor for detecting nose flow

Publications (1)

Publication Number Publication Date
CN112504361A true CN112504361A (en) 2021-03-16

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Application Number Title Priority Date Filing Date
CN202011484253.2A Pending CN112504361A (en) 2020-12-16 2020-12-16 A miniature differential pressure formula flow sensor for detecting nose flow

Country Status (1)

Country Link
CN (1) CN112504361A (en)

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