CN216984891U

CN216984891U - Airflow guiding smoothing device for pulmonary function test

Info

Publication number: CN216984891U
Application number: CN202122937813.1U
Authority: CN
Inventors: 吴正相; 王睿
Original assignee: Chongqing Anku Technology Co ltd
Current assignee: Chongqing Anku Technology Co ltd
Priority date: 2021-11-27
Filing date: 2021-11-27
Publication date: 2022-07-19
Anticipated expiration: 2031-11-27

Abstract

The utility model relates to an airflow guiding and smoothing device for a pulmonary function test, which comprises a breathing tube, wherein a main air passage is formed in the breathing tube, a flow guide nozzle is arranged at one end of the breathing tube, a plurality of flow guide holes distributed in a honeycomb shape are arranged in the flow guide nozzle, the flow guide holes are communicated with the main air passage, and the flow guide holes are polygonal hole passages or circular hole passages. The utility model adopts one end or two ends of the breathing tube to be provided with the flow guide nozzles, and the flow guide holes distributed in a honeycomb shape in the flow guide nozzles are used for guiding the gas flowing through the breathing tube, so that the gas flow in the pipeline is more stable, the noise of the measured data is lower, the measurement precision can be effectively improved, and meanwhile, the flow test range can be effectively enlarged under the condition that the original test data is not distorted.

Description

Airflow guiding smoothing device for pulmonary function test

Technical Field

The utility model relates to the technical field of pulmonary function tests, in particular to an airflow guiding smoothing device for pulmonary function tests.

Background

Lung function tests are one of the necessary tests for respiratory diseases. The method is mainly used for detecting the unobstructed degree of the respiratory tract and the lung capacity, and has important clinical values in the aspects of early detection of pathological changes of the lung and the airway, assessment of the disease severity and prognosis of diseases, assessment of the curative effect of medicines or other treatment methods, identification of the cause of dyspnea, diagnosis of diseased parts, assessment of the tolerance or labor intensity tolerance of lung functions to operations, monitoring of critical patients and the like.

The pulmonary function inspection includes the function survey of lung ventilation, the function survey of lung dispersion, the survey of airway resistance, respiratory muscle power survey etc. when the pulmonary function inspection, it is difficult to mouth to need the testee, it is difficult to chew the mouth, it is difficult to join the filter to chew the mouth and connect respiratory tube (partly equipment is difficult to chew between mouth and the respiratory tube), or partly pulmonary function equipment is difficult to chew the mouth and respiratory tube as an organic whole, there is the sensor that detects the gas flow rate/flow in the middle of the respiratory tube, test instrument through respiratory tube connection carries out the pulmonary function test to the testee.

In the prior art, a breathing pipeline is lack of gas diversion, when a testee exhales, because the structural form of a mouthpiece is different from that of the breathing pipeline, and the gas flow from a lung to an oral cavity and then through the mouthpiece is not stable, the gas distribution is uneven when the gas passes through a flow velocity/flow sensor; similarly, when a testee inhales, the breathing pipeline is in a negative pressure state due to inspiration, air in the air enters the breathing pipeline, and due to uncertainty of air flow, air flow entering and exiting from the tail end of the breathing pipeline and an atmosphere interface is unstable, so that the test result is inaccurate or the repeatability of the test result is low. Therefore, to solve the above problems, an airflow guide smoothing device for lung function test is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an airflow guiding smoothing device for a lung function test, which aims to solve the problems of inaccurate test results or low repeatability of the test results caused by lack of air guiding of a breathing pipeline in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: the airflow guiding and smoothing device for the pulmonary function test comprises a breathing tube, a main air passage is formed in the breathing tube, a flow guide nozzle is arranged at one end of the breathing tube, a plurality of flow guide holes distributed in a honeycomb shape are formed in the flow guide nozzle, and the flow guide holes are communicated with the main air passage.

Preferably, the other end of the breathing tube is provided with a corresponding flow guide nozzle.

Preferably, the diversion nozzle and the breathing tube are integrally formed.

Preferably, the diversion nozzle is inserted into the breathing tube.

Preferably, the diversion holes are polygonal holes or circular holes.

The utility model has at least the following beneficial effects:

the utility model adopts one end or two ends of the breathing tube to be provided with the flow guide nozzles, and the flow guide holes distributed in a honeycomb shape in the flow guide nozzles are used for guiding the gas flowing through the breathing tube, so that the gas flow in the pipeline is more stable, the noise of the measured data is lower, the measurement precision can be effectively improved, and meanwhile, the flow test range can be effectively enlarged under the condition that the original test data is not distorted.

Drawings

FIG. 1 is a schematic perspective view of a first embodiment of the present invention;

FIG. 2 is a front cross-sectional structural view of FIG. 1;

FIG. 3 is a front sectional view schematically illustrating a second embodiment of the present invention;

FIG. 4 is a schematic perspective view of a third embodiment of the present invention;

FIG. 5 is a schematic perspective view of a fourth embodiment of the present invention;

fig. 6 is a schematic perspective view of the blast nozzle in fig. 5;

FIG. 7 is a partial cross-sectional structural view of FIG. 6;

FIG. 8 is a schematic view of the flow guiding effect of the flow guiding nozzle on the gas;

fig. 9 is a graph of test data without a diverter nozzle;

fig. 10 is a test data plot for out of test range without the use of a flow deflector nozzle;

fig. 11 is a test data plot employing a flow nozzle and increasing the test range.

In the reference symbols: 1. a breathing tube; 2. a main air passage; 3. a flow guide nozzle; 4. and (4) flow guide holes.

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.

Example 1

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides an air current direction smoothing device for pulmonary function test, includes respiratory tube 1, be formed with main air duct 2 in the respiratory tube 1, the one end of respiratory tube 1 is equipped with water conservancy diversion mouth 3, be equipped with a plurality of in the water conservancy diversion mouth 3 and be honeycomb distribution's water conservancy diversion hole 4, water conservancy diversion hole 4 and main air duct 2 intercommunication can carry out the level and smooth direction through honeycomb distribution's water conservancy diversion hole 4 convection current through respiratory tube 1, and air current distribution is more even reliable.

Wherein, the diversion holes 4 are polygonal hole channels or circular hole channels.

Wherein, the flow guide nozzle 3 and the breathing tube 1 are integrally formed.

Example 2

Referring to fig. 3, the difference is that based on embodiment 1: the other end of the breathing tube 1 is provided with a corresponding flow guide nozzle 3.

Example 3

Referring to fig. 4, 6 and 7, the breathing tube comprises a breathing tube 1, a main air passage 2 is formed in the breathing tube 1, a flow guide nozzle 3 is arranged at one end of the breathing tube 1, a plurality of flow guide holes 4 distributed in a honeycomb shape are arranged in the flow guide nozzle 3, the flow guide holes 4 are communicated with the main air passage 2, so that the air flow flowing through the breathing tube 1 can be smoothly guided through the flow guide holes 4 distributed in the honeycomb shape, and the air flow distribution is more uniform and reliable.

Wherein, the diversion hole 4 is a polygonal hole or a circular hole.

Wherein, the flow guide nozzle 3 is inserted with the breathing tube 1.

Example 4

Referring to fig. 5-7, the difference is that based on embodiment 3: the other end of the breathing tube 1 is provided with a corresponding flow guide nozzle 3.

The working principle is as follows:

when in use, the breathing tube 1 is internally connected with the gas flow sensor, and the flow guide nozzles 3 are arranged at the outlet end of the breathing tube 1 or at the two ends of the breathing tube 1;

referring to fig. 8, when the subject exhales, the gas flows from the lung to the oral cavity and then flows through the flow guide holes 4 in the flow guide nozzle 3 for smooth flow guide, so that the noise of the gas flow is reduced; similarly, when the testee inhales, the breathing tube 1 is in a negative pressure state, air in the air enters the breathing tube 1 through the flow guide holes 4 in the flow guide nozzle 3, and uncertain air flows stably, so that unstable air is guided and distributed fully and uniformly, and the accuracy of the test result of the flow sensor is improved.

Taking an ultrasonic gas flow sensor as an example, the main advantages of adding the gas guiding smoothing device are evaluated as follows:

1. the air flow in the pipeline can be more stable, and the noise of the measured data is lower.

Taking an ultrasonic gas flow sensor as an example, a pipeline with a large pipeline inner diameter of 19mm is adopted, stable one-way airflow gas of 1L/s, 2L/s, 3L/s, 4L/s, 5L/s, 10L/s, 12L/s and 14L/s is sequentially passed through, after post-gas diversion and bilateral gas diversion are carried out by adopting the diversion nozzle 3, data of 5 seconds in the data are acquired by comparing with data without adopting the gas diversion nozzle 3, and the maximum value and the minimum value in the actual measurement values are recorded as follows:

(1) without using flow guides

(2) By post-diversion

(3) By front and rear diversion

After the flow guide nozzle 3 is added, the range of the test data result is reduced, and the data noise is low. The optimal flow guide nozzles 3 are added at the front and the back, and the data noise can be improved by only adding the flow guide nozzle 3 at one side.

2. The air flow in the pipeline can be more stable, and the measurement precision is improved.

Taking an ultrasonic gas flow sensor as an example, a pipeline with a large pipeline inner diameter of 19mm is adopted, stable one-way airflow gas of 1L/s, 2L/s, 3L/s, 4L/s, 5L/s, 10L/s, 12L/s and 14L/s is sequentially passed through, after post-gas diversion and bilateral gas diversion are carried out by adopting the diversion nozzle 3, comparison is carried out with data without adopting the diversion nozzle 3, and 5 seconds of data is collected to be averaged and recorded as follows:

(1) without using flow guides

(2) By using postposition flow guide

(3) By using front and rear bilateral flow guides

It can be seen that after the flow guide nozzle 3 is added, the accuracy of the test data result is obviously improved at part of flow points, all the flow points are improved, and the contrast improvement of bilateral flow guide and unilateral flow guide is not obvious.

3. The flow test range can be increased without distorting the original test data.

Taking an ultrasonic gas flow sensor (an ultrasonic gas flow sensor based on a time difference method) as an example, a breathing tube 1 with a large inner diameter of a pipeline of 19mm is adopted, the flow of the outlet of the breathing tube 1 is detected through an adjustable one-way airflow and the ultrasonic gas flow sensor, and after a post-gas diversion and bilateral gas diversion mode is carried out by adopting a diversion nozzle 3, the data of the gas diversion nozzle 3 is compared with the data of the non-gas diversion nozzle.

Referring to fig. 9 and 10, when the flow guide nozzle 3 is not used, data distortion does not occur below a flow value of 14.2L/s; the phenomenon of data distortion exists after the passing air flow exceeds the flow point, three data distortion points exist within 4 seconds, the generation reason is that the attenuation amplitude of the ultrasonic signal is increased along with the increase of the flow speed in the main air duct 2 by the time difference method ultrasonic flowmeter, and the ultrasonic signal received by the ultrasonic transducer is easy to distort. Therefore, when the diversion nozzle 3 is not added, the irregular flow of the gas in the main air passage 2 increases along with the increase of the flow velocity at the inlet of the breathing tube 1, namely, the random influence on the ultrasonic signal is caused.

Referring to fig. 11, after the flow guide nozzle 3 is added, the flow guide nozzle 3 can smooth the airflow in the pipeline to a certain extent, and the irregular flow of the air in the pipeline at a large flow rate is reduced, so that the data testing range is enlarged. Fig. 11 shows that the maximum test flow point of the unidirectional air flow can reach 15.98L/s after the addition of the single-side flow guide nozzle, and the data distortion does not occur when the unidirectional air flow is tested for 5 minutes at the flow point (fig. 11 shows data about 4 seconds in the data).

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an air current direction smoothing device for pulmonary function test, includes respiratory tube (1), be formed with main air flue (2) in respiratory tube (1), its characterized in that, the one end of respiratory tube (1) is equipped with water conservancy diversion mouth (3), be equipped with a plurality of in water conservancy diversion mouth (3) and be honeycomb distribution's water conservancy diversion hole (4), water conservancy diversion hole (4) and main air flue (2) intercommunication.

2. The airflow direction smoothing device for lung function test of claim 1, wherein: the other end of the breathing tube (1) is provided with a corresponding flow guide nozzle (3).

3. An airflow guide smoothing device for lung function test according to any one of claims 1-2, wherein: the flow guide nozzle (3) and the breathing tube (1) are integrally formed.

4. An airflow guide smoothing device for lung function test according to any one of claims 1-2, wherein: the flow guide nozzle (3) is inserted into the breathing tube (1).

5. An airflow guide smoothing device for lung function test according to claim 1, wherein: the diversion holes (4) are polygonal hole channels or circular hole channels.