Methane exhaled gas detection device

Abstract

The utility model discloses a methane exhaled gas detection device, one side of a shell is provided with a through groove used for gas circulation in a penetrating manner, a speed reducing mechanism used for slowing down gas flow is arranged in the through groove, one side of the shell is provided with a boss in a protruding manner, one side of the boss is provided with an inclined groove used for placing a blowing nozzle in an inward concave manner, and the blowing nozzle is arranged in the inclined groove. The inclined groove is communicated with the through groove, and a gas sensor used for detecting methane is arranged on the side, close to the inclined groove, of the speed reducing mechanism. The methane detection device has the beneficial effects that through the arranged speed reducing mechanism, the flowing speed of air can be slowed down, and the contact time of gas and the gas sensitive sensor is prolonged, so that the detection precision of methane components in exhaled gas is improved, the practicability of the methane detection device is effectively improved, and the methane detection device is convenient to popularize.

Description

Technical Field

[0001] The utility model relates to the technical field of medical detection, in particular to a methane exhaled breath detection device. Background Art

[0002] The human body itself does not produce methane and hydrogen. The only source of methane and hydrogen in exhaled breath is the gas produced by bacteria in the gastrointestinal tract during the fermentation of carbohydrates. They enter the blood circulation after passing through the intestinal mucosal barrier and are finally exhaled by the alveoli through the expiratory barrier. Therefore, the methane and hydrogen breath test reflects the relationship between carbohydrates in the human gastrointestinal tract.

[0003] According to a human exhaled gas detection device disclosed in Chinese patent publication number CN212134621U, the utility model relates to a human exhaled gas detection device, which is composed of a gas sensor array that can identify six gases, namely, volatile organic gas, carbon dioxide, hydrogen sulfide, ammonia, hydrogen, and methane, an analog-to-digital conversion module, a single-chip microcomputer, a peripheral circuit, and a liquid crystal display module. The analog-to-digital conversion module contains a multi-way switch and an A / D conversion circuit. The multi-way switch can select 8 analog channels, allowing 8 analog quantities to be input in time-sharing mode, and a common A / D conversion circuit is used for conversion. The gas sensors of the six gases select 6 analog channels in time-sharing mode. The gas sensor is connected to the multi-way switch inside ADC0809, and the single-chip microcomputer is connected to ADC0809 to measure the six gases and display the measured values ​​of the six gases. The utility model can help to assist in analyzing the health status of the human body and assist in disease diagnosis, and is a low-cost and convenient detection device for detecting human exhaled gas.

[0004] According to the above patent, a device is provided for detecting human exhaled gas. When detecting human exhaled gas, the gas needs to flow over the surface of the detection device for detection. If the gas is blown directly, the gas will quickly diffuse in the air. Therefore, the gas sample in contact with the detection device will be relatively small and the contact time will be shorter, resulting in a larger error in the detection data.

[0005] Therefore, those skilled in the art provide a methane exhaled breath detection device to solve the problems raised in the above background technology. Utility Model Content

[0006] The purpose of the utility model is to provide a methane exhaled breath detection device to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A methane exhaled breath detection device, wherein a through groove for gas circulation is provided through one side of the shell, a speed reduction mechanism for slowing down the gas flow is provided in the through groove, a boss is provided on one side of the shell, and an inclined groove for placing a mouthpiece is provided in a concave manner on one side of the boss, the inclined groove is connected to the through groove, and a gas sensor for detecting methane is provided on the side of the speed reduction mechanism close to the inclined groove.

[0009] Furthermore, the deceleration mechanism includes a valve body, a valve core and a diversion air channel. The valve body is embedded in the through groove, a sliding sleeve on one side of the valve body is provided with a valve core for blocking the flow of gas, and a plurality of diversion air channels for gas diversion are provided on one side of the through groove close to the valve body.

[0010] Furthermore, the outer wall of the valve core is raised to form a baffle, the inner part of the valve body is concave to form a slide groove for sleeve-mounting the baffle, and a spring is fixedly connected between the side of the baffle away from the inclined groove and the slide groove.

[0011] Furthermore, a cavity is concavely provided on one side of the valve core away from the inclined groove, and a plurality of exhaust grooves are provided at the bottom of the cavity.

[0012] Furthermore, the two ends of the diversion airway communicating with the through groove are configured as end A and end B, and the end A and end B are respectively located on both sides of the valve body, wherein the end close to the valve core is end A, and the other end is end B.

[0013] Furthermore, the outer diameter of the valve core is smaller than the diameter of the through groove, and when the valve core slides out of the valve body and is in a maximum extended state, the exhaust groove is located between the valve body and the A end.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) By setting up a deceleration mechanism, the flow speed of air can be slowed down, and the contact time between the gas and the gas sensor can be increased, thereby improving the detection accuracy of the methane component in the exhaled gas, effectively increasing the practicality of the methane detection device, and making the methane detection device easier to promote.

[0016] (2) When the valve core is extended to the maximum value, the exhaust groove is located on one side of the A end, so that when cleaning the methane detection device later, the airflow of the dried water droplets can be prevented from colliding with each other and affecting the flow of gas, thereby making the cleaning more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a methane exhaled breath detection device according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of a methane exhaled breath detection device according to an embodiment of the utility model;

[0020] Figure 3 The present invention is a schematic structural diagram of a valve body and a valve core in a methane exhaled breath detection device according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 1. Shell; 2. Gas sensor; 3. Through groove; 4. Speed ​​reduction mechanism; 41. Valve body; 42. Valve core; 43. Diverter air channel; 5. Boss; 6. Inclined groove; 7. Baffle; 8. Slide groove; 9. Cavity; 10. Exhaust groove; 11. End A; 12. End B. DETAILED DESCRIPTION

[0023] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0024] Embodiment 1:

[0025] See also Figure 1-3 According to a methane exhaled breath detection device of an embodiment of the utility model, a through groove 3 for gas circulation is provided on one side of the shell 1, and a speed reduction mechanism 4 for slowing down the flow of gas is provided in the through groove 3. A boss 5 is provided on one side of the shell 1, and an inclined groove 6 for placing a mouthpiece is provided on one side of the boss 5. The inclined groove 6 is connected to the through groove 3, and a gas sensor 2 for detecting methane is provided on the side of the speed reduction mechanism 4 close to the inclined groove 6.

[0026] Through the above scheme of the utility model, the boss 5 and the inclined groove 6 are provided, so that the nozzle can be placed conveniently, and then the gas sensor 2 is blown through the nozzle, and the concentration of methane is detected by the gas sensor 2. When the gas enters the through groove 3, the speed reduction mechanism 4 is provided to block the flow of gas, so that the time the gas stays in the through groove 3 is increased, thereby increasing the contact time between the gas and the gas sensor 2, and improving the detection accuracy of the gas sensor 2. The above-mentioned gas sensor 2 is the same as the detection device provided by patent publication number CN212134621U, and is not within the scope of improvement of the present application, so it will not be described in detail.

[0027] Embodiment 2:

[0028] See also Figure 2-3 The deceleration mechanism 4 includes a valve body 41, a valve core 42 and a diversion airway 43. The valve body 41 is embedded in the through groove 3. A valve core 42 for blocking the flow of gas is slidably sleeved on one side of the valve body 41. A plurality of diversion airways 43 for gas diversion are arranged on the side of the through groove 3 close to the valve body 41. The outer wall of the valve core 42 is convex to form a baffle 7. The inner concave part of the valve body 41 is provided with a slide groove 8 for sleeve-mounting the baffle 7. A spring is fixedly connected between the side of the baffle 7 away from the inclined groove 6 and the slide groove 8. The valve core 42 is away from the inclined groove 6. A cavity 9 is concavely provided on one side of the inclined groove 6, and a plurality of exhaust grooves 10 are provided at the bottom of the cavity 9. The two ends of the diverter airway 43 connected to the through groove 3 are set as an A end 11 and a B end 12, and the A end 11 and the B end 12 are respectively located on both sides of the valve body 41, wherein the end close to the valve core 42 is the A end 11, and the other end is the B end 12. The outer diameter of the valve core 42 is smaller than the diameter of the through groove 3. When the valve core 42 slides out of the valve body 41 and is in the maximum extended state, the exhaust groove 10 is located between the valve body 41 and the A end 11.

[0029] Through the above-mentioned scheme of the utility model, when the blown gas enters the through groove 3, the gas first contacts with the gas sensitive sensor 2, and then when the gas is to be discharged through the exhaust groove 10 in the valve core 42, it will first contact with the end face of the valve core 42, so that a thrust will be generated on the end face of the valve core 42, thereby pushing the valve core 42 into the valve body 41, closing the exhaust groove 10, so that the gas can only be discharged through the diversion airway 43 with a smaller cross-section, slowing down the flow rate of the gas, thereby increasing the contact time between the gas and the gas sensitive sensor 2 and improving the detection accuracy. After the test is finished, because the exhaled gas from the human body is hot air with high humidity, water droplets will be generated in the through groove 3 when the hot air meets the cold air. The water droplets remaining in the through groove 3 will cause the growth of bacteria because they cannot be quickly air-dried, so the detection device will have a peculiar smell, affecting the user experience. Therefore, an air intake unit for blowing can be set at the exhaust end of the through groove 3 to accelerate the air circulation inside the through groove 3 and achieve the effect of air-drying the water droplets. Because a diverter airway 43 is provided, the gas will not only be discharged through the exhaust groove 10 of the valve core 42, but also through the diverter airway 43. Therefore, when the valve core 42 is extended to the maximum value, the exhaust groove 10 is located on one side of the A end, which can avoid the air discharged from the valve core 42 and the air discharged from the diverter airway 43 from colliding with each other to affect the air-drying efficiency and improve the cleaning effect of the detection device. The air intake unit can be a mechanical component such as a fan or an air pump that can transport air.

[0030] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0031] In actual application, the nozzle is placed on the inclined groove 6, and then air is blown. The gas enters the through groove 3 through the nozzle and contacts the gas sensor 2, pushing the valve core 42 to slide into the valve body 41, closing the exhaust groove 10, thereby blocking the discharge of the gas, increasing the contact time between the gas and the gas sensor 2, and improving the detection accuracy.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A methane exhaled breath detection device, comprising a housing (1) and a gas sensor (2), characterized in that: A through groove (3) for gas circulation is provided through one side of the shell (1), a deceleration mechanism (4) for slowing down the flow of gas is provided in the through groove (3), a boss (5) is provided protrudingly on one side of the shell (1), and an inclined groove (6) for placing a blow nozzle is provided concavely on one side of the boss (5), the inclined groove (6) is communicated with the through groove (3), and a gas sensor (2) for detecting methane is provided on a side of the deceleration mechanism (4) close to the inclined groove (6).

2. A methane exhaled breath detection device according to claim 1, characterized in that: The speed reduction mechanism (4) comprises a valve body (41), a valve core (42) and a diversion air channel (43); the valve body (41) is embedded in the through groove (3); a valve core (42) for blocking the flow of gas is slidably sleeved on one side of the valve body (41); and a plurality of diversion air channels (43) for gas diversion are arranged on one side of the through groove (3) close to the valve body (41).

3. A methane exhaled breath detection device according to claim 2, characterized in that: The outer wall of the valve core (42) is raised to form a baffle (7), and the interior of the valve body (41) is concave to form a slide groove (8) for sleeve-mounting the baffle (7), and a spring is fixedly connected between the side of the baffle (7) away from the inclined groove (6) and the slide groove (8).

4. A methane exhaled breath detection device according to claim 2, characterized in that: A cavity (9) is concavely arranged on one side of the valve core (42) away from the inclined groove (6), and a plurality of exhaust grooves (10) are arranged at the bottom of the cavity (9).

5. A methane exhaled breath detection device according to claim 4, characterized in that: The two ends of the flow-dividing passage (43) communicating with the through groove (3) are configured as an A end (11) and a B end (12), and the A end (11) and the B end (12) are respectively located on two sides of the valve body (41), wherein the end close to the valve core (42) is the A end (11), and the other end is the B end (12).

6. A methane exhaled breath detection device according to claim 5, characterized in that: The outer diameter of the valve core (42) is smaller than the diameter of the through groove (3); when the valve core (42) slides out of the valve body (41) and is in a maximum extended state, the exhaust groove (10) is located between the valve body (41) and the A end (11).

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