CN213249277U

CN213249277U - Portable expired air collection system

Info

Publication number: CN213249277U
Application number: CN202021254367.3U
Authority: CN
Inventors: 李杭; 李海洋
Original assignee: Shenzhen Berui Biotechnology Co ltd
Current assignee: Shenzhen Berui Biotechnology Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-05-25
Anticipated expiration: 2030-07-01

Abstract

The utility model provides a portable expired air collection system. The utility model discloses a: gas pipeline, gas circuit transform mechanism, gaseous detection mechanism and blowback mechanism, gas pipeline is including the breathing gas entering section of intercommunication, the breathing gas detects the section, the breathing gas output section, exhaust emissions section and gaseous blowback section, gaseous detection mechanism is including setting up the sensor on the breathing gas detects the section, gas circuit transform mechanism is used for changing the unobstructed/block state of expired gas passageway, blowback mechanism is used for inhaling outside air and passes through it and discharge from breathing gas entering section or exhaust emissions section through gaseous blowback section, the breathing gas output section is used for external gaseous collection container, accomplish the collection of expired gas. The utility model discloses a cooperation of sensor, host processor and solenoid valve, automatic switch-over gathers the route to effectively gather the alveolar gas of testee. The semiconductor refrigeration sheet is used for quickly liquefying the water vapor of the subject after expiration, so that the water vapor in the expiration is effectively removed, and the redundant components of collected gas are reduced.

Description

Portable expired air collection system

Technical Field

The utility model relates to an expired gas detects technical field, especially relates to a portable expired gas collection system.

Background

From the perspective of human breathing, a person inhales oxygen and exhales carbon dioxide, but none is pure gas. The actual inhaled air, depending on the individual situation, contains water vapour and carbon dioxide, and most people also include nitrogen, oxygen, inert gases and other components. The human body respiratory gas is used as a reflecting way of the health condition of the human body, can reflect some important pathological symptoms, so the exhaled breath of the human body can be used for various medical diagnosis technologies including exhaled breath analysis.

The exhaled air is mainly composed of two parts, one part is "dead space air" from the upper respiratory tract, which is not exchanged with blood, and the other part is air from the deep part of the alveoli, which is exchanged with blood, and is called "alveolar air", which is about 150 ml. The main object of respiratory gas research is alveolar gas, and dead space gas can dilute the concentration of disease markers in the alveolar gas and also influence the effectiveness of respiratory gas analysis.

The device for collecting exhaled breath in the prior art has certain defects, for example, the device for collecting exhaled breath in the pulmonary alveoli of CN 207779768U can blow air into an air bag, and experiments on large samples are completed through multiple blowing results, which cannot effectively distinguish "dead space air" from "pulmonary alveoli", and the practical application effect is not good, the device for collecting exhaled breath in CN 203465233U of hand-held exhalation analyzer collects exhaled breath of a subject into an air chamber, and pumps the exhaled breath to a collecting end through an air pump, and a one-way valve is arranged between the devices to ensure that the exhaled breath moves singly, but after the pulmonary alveoli of a first subject are collected, because the air chamber or a pipeline inevitably has air residue, the collected data of the next subject may be influenced, the respiratory breath of all subjects cannot be effectively analyzed, and the subsequent analysis results are not accurate enough.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned technical problems, a portable exhaled breath collecting device is provided. The utility model discloses utilize solenoid valve and blowback system, it is residual to clear away last subject exhalation in the pipeline fast, has ensured the accuracy of gathering the expiration. The utility model discloses a technical means as follows:

a portable expired air collection system comprises a gas pipeline, a gas circuit transformation mechanism, a gas detection mechanism and a back flushing mechanism, wherein the gas pipeline comprises a respiratory gas inlet section, a respiratory gas detection section, a respiratory gas output section, an exhaust gas discharge section and a gas back flushing section which are communicated, the gas detection mechanism comprises a sensor arranged on the respiratory gas detection section, the gas circuit transformation mechanism is used for changing the unobstructed/blocked state of an expired gas passage and comprises a first electromagnetic valve arranged between the respiratory gas detection section and the respiratory gas output section and a second electromagnetic valve arranged between the respiratory gas detection section and the exhaust gas discharge section, each electromagnetic valve and the sensor are connected with a main processor, the sensor is used for detecting the state parameters of expired air and transmitting the collected data to the main processor, and the main processor can control the on-off of the first electromagnetic valve and the second electromagnetic valve based on the state parameters of the expired air, the first electromagnetic valve is also communicated with an air back blowing section, a one-way valve is arranged between the first electromagnetic valve and the air back blowing section, the back blowing mechanism is used for sucking external air and discharging the external air from a breathing air inlet section or a waste gas discharge section through the air back blowing section, and the breathing air output section is used for being externally connected with an air collection container to finish collection of the exhaled air.

Further, breathe gas and get into section and accomplish the filtration of exhaling gas normal steam through the mode with vapor liquefaction, specifically, breathe gas and get into the section and include blow gun connecting portion, condensing part and breathe gas detection section connecting portion, blow gun connecting portion are used for connecting external blow gun, the outside attached of condensing part is with the semiconductor refrigeration piece that is used for the refrigeration, semiconductor refrigeration piece and main processor electric connection, breathe gas detection section connecting portion can cup joint on breathing gas detection section.

Further, the outside both sides of condensing part all are equipped with the semiconductor refrigeration piece, still set up the thermistor that is used for real-time measurement condensing part temperature value, be used for doing radiating fin and radiator fan of semiconductor refrigeration piece, the semiconductor refrigeration piece one side is the heat dissipation end for refrigeration end one side, the refrigeration end and the laminating of condensing part main part of semiconductor refrigeration piece, the heat transfer end laminating of heat conduction silica gel and fin is held in the heat dissipation of semiconductor refrigeration piece, the heat dissipation of fin is held and is placed radiator fan, radiator fan can adjust the rotational speed under the control of owner treater.

Further, the sensor includes a flow sensor.

Furthermore, the back-blowing mechanism comprises a micro air pump, an exhaust port of the micro air pump is connected with the gas back-blowing section, and a filter for purifying air is further arranged between the micro air pump and the gas back-blowing section.

Further, still include the main casing body, gas pipeline, gas circuit conversion mechanism, blowback mechanism and first solenoid valve, second solenoid valve all arrange wherein in, are equipped with a plurality of openings on the main casing body, including the opening of breathing gas entering section, the opening of breathing gas output section.

Furthermore, the filter is a detachable filter, and an opening for observing the use condition of the detachable filter is arranged on the main shell.

The utility model discloses a cooperation of sensor, host processor and solenoid valve, automatic switch-over gathers the route to effectively gather the alveolar gas of testee. The semiconductor refrigeration sheet is used for quickly liquefying the water vapor of the subject after expiration, so that the water vapor in the expiration is effectively removed, and the redundant components of collected gas are reduced. The air in the air passage is quickly cleaned through the back-blowing mechanism, so that the confusion of the expiration of the next testee is prevented. Therefore, the utility model discloses the suitable wide popularization in expired gas detection technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an external structure schematic diagram of a portable expired air collection system according to an embodiment of the present invention.

Fig. 2 is an isometric exploded view of a portable exhaled breath collection assembly in an embodiment of the present invention.

Fig. 3 is a front view of the interior of a portable exhaled breath collection device in an embodiment of the present invention.

Fig. 4 is an exploded view of the present invention.

Fig. 5 is a circuit diagram of the control system of the present invention.

Fig. 6 is a schematic view of a mouthpiece connecting portion connected to an exhalation inlet according to an embodiment of the present invention.

In the figure: 001. a micro air pump; 002. a filter; 003. a one-way valve; 004. connecting an air pipe; 005. a cannula conducting joint; 006. a tee joint is connected with the joint; 007. a flow rate sensor; 008. a second solenoid valve; 009. a four-way adapter; 010. a first solenoid valve; 101. a main processor; 102. an upper shell; 103. a bottom layer housing; 104. a rechargeable power supply battery; 105. a touch display screen; 106. a control circuit board; 107. a blowing nozzle; 108. a mouthpiece connecting section; 109. respiratory gas condensing equipment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-5, the embodiment discloses a portable expired air collection system, including the main casing body and set up gas pipeline, gas circuit transform mechanism, gaseous detection mechanism and blowback mechanism wherein, the main casing body includes upper shell 102, bottom shell 103 and sets up the display screen support therein, upper shell and bottom shell pass through bolted connection, the display screen support is fixed on the bottom shell, is connected with control circuit board 106, device power and touch display screen 105 on it, set up the opening that matches touch display screen on the upper shell. The main shell body is provided with a plurality of openings, including an opening of a respiratory gas inlet section and an opening of a respiratory gas output section.

The gas pipeline comprises a respiratory gas inlet section, a respiratory gas detection section, a respiratory gas output section, a waste gas discharge section and a gas back flushing section which are communicated, the gas detection mechanism comprises a sensor arranged on the respiratory gas detection section, the gas circuit transformation mechanism is used for changing the unobstructed/blocked state of an exhaled gas passage and comprises a first electromagnetic valve 010 arranged between the respiratory gas detection section and the respiratory gas output section and a second electromagnetic valve 008 arranged between the respiratory gas detection section and the waste gas discharge section, each electromagnetic valve and the sensor are connected with the main processor 101, the sensor is used for detecting the state parameters of the exhaled gas and transmitting the collected data to the main processor, the main processor can control the on-off of the first electromagnetic valve and the second electromagnetic valve based on the state parameters of the exhaled gas, the first electromagnetic valve is also communicated with the gas back flushing section, and a one-way valve is arranged between the first electromagnetic valve and the second electromagnetic valve, the blowback mechanism is used for inhaling the external air and discharges it from breathing gas entering section or waste gas discharge section through gaseous blowback section, the breathing gas output section is used for external gaseous collection container, accomplishes the collection of expired gas, the breathing gas output section can select plug stop valve (quick stop valve/quick-operation joint).

The sensor includes a flow sensor 007, in this embodiment, a gas pressure sensor MPXV7002DP is optional. In this embodiment, the pipe diameter of gas passage is 4mm, and other embodiments can be adjusted in certain extent, and in this embodiment, the treater can select the embedded low-power consumption chip of STM32 based on the ARM kernel.

The first electromagnetic valve and the second electromagnetic valve are two-position two-way electromagnetic valves, a four-way adapter 009 is arranged between the first electromagnetic valve and the second electromagnetic valve, and the four-way adapter is respectively connected with the expiration input end of the first electromagnetic valve, the expiration input end of the second electromagnetic valve, the input end of the flow rate sensor and the expiration inlet.

The back blowing mechanism comprises a miniature air pump 001, such as a 12V brushless motor air pump, and the flow rate range is 1000mL/min-2000 mL/min. The gas vent of miniature air pump with gaseous blowback section links to each other, still installs the filter 002 that is used for air-purifying between them, the expiration output of first solenoid valve is equipped with three way connection 006, three way connection respectively with be used for with the intubate on-state connection 005 that connects the gas bag to link to each other, the export of filter links to each other with the export of filter, still be equipped with check valve 003 between the export of filter and the three way connection, when preventing the non-blowback state, the gaseous blowback section of breathing gas entering, the filter links to each other through the entry end of connecting trachea 004 and check valve. The filter is a detachable filter, the main shell is also provided with an opening for observing the use condition of the detachable filter, and the filter is replaced after the internal structure of the filter is observed to reach or the service life of the filter is about to reach. The filter can be ZFC54 or ZFC53 of SMC company, and the filter needs to be replaced when the device is continuously used for 1 month.

Example 2

As shown in fig. 6, in this embodiment, still can be through getting into the section with the breathing gas and setting up the mechanism with water vapor liquefaction to accomplish the filtration of vapor in the exhaled breath, specifically, the breathing gas gets into the section and includes mouthpiece connecting portion 108, breathing gas condensing equipment 109, mouthpiece connecting portion are used for connecting external mouthpiece 107, in this embodiment, in order to reduce the air resistance, the internal diameter of mouthpiece connecting portion matches with the external diameter of mouthpiece, under the unobstructed circumstances of assurance air current, the mouthpiece can joint on the mouthpiece connecting portion effectively. The outside of the condensing part is attached with a semiconductor refrigeration piece for refrigeration, the semiconductor refrigeration piece is electrically connected with the main processor, and the rear section of the breathing gas condensing device can be arranged at the breath input end. As the preferred embodiment, there is predetermined angle of buckling in the back end of condensing part for portable expired air collection system sits back on the desktop, and the examinee can freely exhale through the mouthpiece, and as the preferred embodiment, gaseous business turn over mechanism adopts the quartz material, for the attached of processing and semiconductor refrigeration piece, the holistic cross section of condensing part is the polygon, and further still can be the regular polygon that the cross-sectional area is the same. In this embodiment, the semiconductor cooling fins are 2 groups and symmetrically attached to two sides of the condensing portion.

Both sides of the outside of the condensing part are provided with semiconductor refrigerating sheets, and a thermistor for measuring the temperature value of the condensing part in real time is also arranged, the heat radiating fin and the heat radiating fan are used for radiating heat of the semiconductor refrigerating fin, in the embodiment, the thermistor is formed by a high-precision thermistor with the precision of 1 percent, one surface of the semiconductor refrigeration sheet is a refrigeration end and the other surface of the semiconductor refrigeration sheet is a heat dissipation end, the refrigeration end of the semiconductor refrigeration sheet is attached to the condensation part main body, the heat dissipation end of the semiconductor refrigeration sheet is attached to the heat transfer end of the heat dissipation sheet through heat conduction silica gel, the heat radiation fan is arranged at the heat radiation end of the heat radiation fin and can adjust the rotating speed under the control of the main processor, under the control of the main processor, the higher the rotating speed of the fan is, the more obvious the heat dissipation effect is, the heat dissipation end of the heat dissipation fin is a grid-shaped metal sawtooth, and the temperature control precision can reach 0.01 ℃. In this embodiment, the cooling fan can be a 5V dc cooling fan, and the fan is provided with a threaded hole, and the fan and the semiconductor cooling fins on both sides are fixed on both sides of the condensation portion by screwing the bolts.

By adjusting the refrigerating temperature of the semiconductor refrigerating sheet to the dew point temperature of the water vapor under the atmospheric pressure, the water vapor of the subject after expiration can be quickly liquefied at the front end of the condensing part, and the water vapor in the expiration is effectively removed. According to specific experimental requirements, the preset percentage of the water vapor dehumidification is different, and the refrigeration temperature is also different, in the embodiment, the refrigeration temperature is controlled to be 10 ℃ to-10 ℃, and the preset percentage of the water vapor dehumidification is 50-80 or higher.

After the subject collects the alveolar gas, the next subject collects the liquid water after the expiration, as a preferred implementation mode, the condensing part is further provided with a heating device, in the embodiment, the number of each group of semiconductor chilling plates is 2, the refrigerating end of one semiconductor chilling plate is attached to the quartz body, the radiating end of the other semiconductor chilling plate is attached to the quartz body, when the voltage is positive, one semiconductor chilling plate chills, and when the voltage is negative, one semiconductor chilling plate heats. In other alternative embodiments, grooves for accommodating the heating plates may be formed on both sides of the quartz body of the condensation portion, and the main processor controls the heating plates to heat, so that the evaporation effect of the water vapor is better, but the main processor also has the disadvantage of affecting the service life of the semiconductor cooling plate, and a suitable heating mode may be selected according to actual conditions.

For better realization human-computer interaction, whole device adopts the full-color LED screen that has touch-control function to realize the demonstration of monitorable numerical values such as condensation segment temperature, sensor detection value, the LED screen not only can realize showing the function and still have touch-control function simultaneously, through clicking the position that corresponds at the LED display screen, realizes the distribution of different instructions, wherein includes functions such as miniature air pump start-up.

The specific use of embodiment 1 of the invention comprises the following steps: step 1, before the device is used, the device is reset through an LED screen, namely a first electromagnetic valve rotates to a closed position, a second electromagnetic valve rotates to an open position, a gas path is unobstructed and comprises a respiratory gas inlet section, a respiratory gas detection section and a waste gas discharge section, a micro air pump of a back flushing mechanism is closed, and other electrical components are in a standby state. Step 2, the testee breathes out of the device after installing the mouthpiece, detects that the exhaled air is dead space air or alveolar air under the detection of the flow sensor, and if the exhaled air is dead space air, the exhaled air is discharged from the waste gas discharge section; if the respiratory gas is alveolar gas, the main processor controls the first electromagnetic valve to rotate to an open position, the second electromagnetic valve rotates to a closed position, and the gas path is unobstructed and sequentially comprises a respiratory gas inlet section, a respiratory gas detection section and a respiratory gas output section for gas collection. And 3, before the next testee exhales, starting the miniature air pump, and ensuring that no gas residue of the last testee exists in the pipeline through the back flushing pipeline.

In the collection process, the flow rate can be collected by utilizing the flow rate sensor to perform time and flow rate integration. The flow volume of the evacuated gas is set to be 500mL-1000 mL. And judging the flow by using the flow velocity sensor. Determined according to the air bag accommodation volume. Typically, a 2L air bag volume is selected and a 1L sample air bag fill volume. When the gas volume exceeds 1L, the control valve body switches the state.

In the case where a mechanism for liquefying water vapor is installed, embodiment 2 of the present invention specifically uses a mechanism including the steps of: step 1, before the device is used, the device is reset through an LED screen, namely a first electromagnetic valve rotates to a closed position, a second electromagnetic valve rotates to an open position, a gas path is unobstructed and comprises a respiratory gas inlet section, a respiratory gas detection section and a waste gas discharge section, a micro air pump of a back flushing mechanism is closed, and other electrical components are in a standby state. And 2, before the subject prepares to exhale, starting the sensor and the semiconductor refrigerating sheet. Step 3, the testee breathes out into the device after installing the mouthpiece, the breathed out gas removes most of water vapor through the condensation segment, under the detection of the flow sensor, the detection result shows that the exhaled gas is dead space gas or alveolus gas, if the exhaled gas is dead space gas, the exhaled gas is discharged from the waste gas discharge segment; if the respiratory gas is alveolar gas, the main processor controls the first electromagnetic valve to rotate to an open position, the second electromagnetic valve rotates to a closed position, and the gas path is unobstructed and sequentially comprises a respiratory gas inlet section, a respiratory gas detection section and a respiratory gas output section for gas collection. And 4, before the next testee exhales, starting the miniature air pump, enabling the first electromagnetic valve to be still in the open position, enabling the second electromagnetic valve to rotate to the closed position or the open position, simultaneously starting the heating mechanism if the first electromagnetic valve is in the closed position, and removing residual liquid in the condensation section as soon as possible, wherein if the second electromagnetic valve is in the open position, a part of back flushing gas is discharged through the waste gas discharge section.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A portable expired air collection system is characterized by comprising an air pipeline, an air circuit transformation mechanism, an air detection mechanism and a back flushing mechanism, wherein the air pipeline comprises a respiratory air inlet section, a respiratory air detection section, a respiratory air output section, an exhaust gas discharge section and an air back flushing section which are communicated, the air detection mechanism comprises a sensor arranged on the respiratory air detection section, the air circuit transformation mechanism is used for changing the unobstructed/blocked state of an expired air passage and comprises a first electromagnetic valve arranged between the respiratory air detection section and the respiratory air output section and a second electromagnetic valve arranged between the respiratory air detection section and the exhaust gas discharge section, each electromagnetic valve and each sensor are connected with a main processor, the sensor is used for detecting the state parameters of expired air and transmitting the collected data to the main processor, and the main processor can control the on-off of the first electromagnetic valve and the second electromagnetic valve based on the state parameters of the expired air, the first electromagnetic valve is also communicated with an air back blowing section, a one-way valve is arranged between the first electromagnetic valve and the air back blowing section, the back blowing mechanism is used for sucking external air and discharging the external air from a breathing air inlet section or a waste gas discharge section through the air back blowing section, and the breathing air output section is used for being externally connected with an air collection container to finish collection of the exhaled air.

2. The portable exhaled breath collection device of claim 1, wherein the sensor comprises a flow sensor.

3. The portable expired air collection device of claim 1, further comprising a main housing, wherein the gas pipeline, the gas circuit changing mechanism, the back flushing mechanism, the first solenoid valve and the second solenoid valve are disposed therein, and the main housing is provided with a plurality of openings, including an opening of the respiratory gas inlet section and an opening of the respiratory gas outlet section.

4. The portable expired air collection device of claim 1, wherein the back-blowing mechanism comprises a micro air pump, an exhaust port of the micro air pump is connected with the air back-blowing section, and a filter for purifying air is further installed between the micro air pump and the air back-blowing section.

5. The portable exhaled breath collection device according to claim 4, wherein the filter is a removable filter, and the main housing is provided with an opening through which the use of the removable filter can be observed.

6. The portable exhaled breath collection device of claim 1, wherein the exhaled breath entry section is configured to filter water vapor in the exhaled breath by liquefying water vapor, and specifically, the exhaled breath entry section comprises a mouthpiece connection portion, a condensation portion, and a exhaled breath detection section connection portion, the mouthpiece connection portion is configured to connect to an external mouthpiece, a semiconductor refrigeration sheet for refrigeration is attached to an exterior of the condensation portion, the semiconductor refrigeration sheet is electrically connected to the main processor, and the exhaled breath detection section connection portion can be sleeved on the exhaled breath detection section.

7. The portable expired air collection system of claim 6, wherein both sides outside the condensation portion are provided with semiconductor refrigeration pieces, a thermistor for measuring the temperature value of the condensation portion in real time is further arranged, and a heat radiation fin and a heat radiation fan for radiating the semiconductor refrigeration pieces are used, one face of each semiconductor refrigeration piece is a refrigeration end and one face of each semiconductor refrigeration piece is a heat radiation end, the refrigeration ends of the semiconductor refrigeration pieces are attached to the condensation portion main body, the heat radiation ends of the semiconductor refrigeration pieces are attached to the heat transfer ends of the heat radiation fins through heat conduction silica gel, the heat radiation fans are placed at the heat radiation ends of the heat radiation fins, and the rotation speed of each heat radiation fan can be adjusted under the control of the main processor.