CN219348328U - Gas collection device - Google Patents

Abstract

The present utility model provides a gas collection device having a gas inlet through which a gas enters a reaction chamber, a gas outlet through which the gas is discharged from the reaction chamber, and a reaction chamber for accommodating a test membrane, wherein a gas flow path communicating the gas inlet and the gas outlet is formed in the reaction chamber, the test membrane is located in the middle of the gas flow path, and is configured to collect a substance in a gas passing through the gas flow path, and the gas flow path is configured to: the gas entering the reaction chamber does not pass through the test membrane but passes through the test membrane along a reaction surface of the test membrane, and the gas collecting device further has a window portion through which the reaction surface of the test membrane can be detected. The gas collection device provided by the utility model can be simply operated by a user, and can be used for easily realizing gas collection and subsequent detection.

Description

Gas collection device

Technical Field

The utility model relates to the technical field of detection, and particularly provides a gas acquisition device.

Background

The exhaust gases of automobiles, industrial waste gases and even the expired gases of human bodies can possibly contain organic matters (volatile organic compounds, namely VOCs), and the gases are collected and then detected and analyzed at present.

The main flow of VOC type and content detection method is to detect gas by gas chromatography-mass spectrometry, and in the structure for analyzing the VOCs, the sample can be pre-concentrated to improve the analysis precision, and the pre-concentration can reduce huge loss in the separation and purification process to a certain extent. Common gas sample concentration methods are Thermal Desorption (TD) tubes and Solid Phase Microextraction (SPME).

In the existing structure for collecting and detecting gas, the gas is collected through a gas bag, a gas sample in the gas bag is pre-concentrated, and then released into a detection instrument for detection. Therefore, the gas is required to be taken out of the gas bag in operation, which is complicated.

Disclosure of Invention

Problems to be solved by the utility model

The utility model aims to provide a novel gas collection device, which can be simply operated by a user and can easily realize gas collection and subsequent detection compared with a structure that gas is collected by using a gas bag and then taken out for detection.

Solution for solving the problem

The present utility model provides a gas collection device, comprising a gas inlet through which a gas enters a reaction chamber, a gas outlet through which the gas is discharged from the reaction chamber, and a reaction chamber for accommodating a test film, wherein a gas flow path communicating the gas inlet and the gas outlet is formed in the reaction chamber, the test film is located in the middle of the gas flow path, and is configured to collect a substance in a gas passing through the gas flow path, and the gas flow path is configured to: the gas entering the reaction chamber does not pass through the test membrane but passes through the test membrane along a reaction surface of the test membrane, and the gas collecting device further has a window portion through which the reaction surface of the test membrane can be detected.

Preferably, the gas collection device further has a base, the reaction chamber is formed by combining the base and the window portion, and the test membrane is sealingly sandwiched between the base and the window portion.

Preferably, one of the base and the window has a groove, the other of the base and the window has a boss that is inserted into the groove to sealingly sandwich the test membrane between the base and the window

Preferably, the grooves and the bosses extend linearly, and/or the surfaces of the bosses and the grooves, which are matched with each other, are curved surfaces.

Preferably, the edge of the test membrane is sandwiched between the groove and the boss.

Preferably, one pair of the groove and the boss is formed, and at least one edge of the test film is sandwiched between two or more pairs of the groove and the boss.

Preferably, the window portion has a viewing window, and the viewing window covers at least a part of the test film when the window portion is projected on the plane of the test film.

Preferably, the gas collection device further has a gas amount monitoring unit that monitors an amount of gas entering the gas collection device.

Preferably, the test film includes: a basal plane, the gas passing through the test membrane in a direction parallel to the basal plane; and a plurality of protruding structures protruding from the basal plane, wherein a reaction part for reacting with the gas is provided on the top surface of the plurality of protruding structures.

Preferably, the material of the reaction portions provided on at least two of the convex structures is different from each other.

ADVANTAGEOUS EFFECTS OF INVENTION

The present utility model can provide a gas collection device that can collect gas without taking out the gas, can significantly simplify the operation, and can easily detect the gas, compared with a structure in which the gas is taken out for detection after collecting the gas by using an air bag.

Drawings

Fig. 1 is a perspective view of a gas collection device of the present utility model.

Fig. 2 is an exploded view of the gas collection device of the present utility model.

Fig. 3 is a top view of the gas collection device of the present utility model.

Fig. 4 is a bottom view of the gas collection device of the present utility model.

Fig. 5 is a longitudinal sectional view of the gas collecting apparatus of the present utility model.

Fig. 6 is a drawing of the gas collection device as viewed along the gas inlet.

Fig. 7 is a cross-sectional view taken from A-A in fig. 5.

Fig. 8 is an enlarged view of a portion B in fig. 7.

Fig. 9 is a schematic of the microstructure of the test membrane.

Fig. 10 is an enlarged schematic view of the microstructure of the test membrane.

Fig. 11 is a diagram showing an example of the gas amount monitoring unit.

Description of the reference numerals

100. The device comprises a gas collection device, 1, a gas inlet, 2, a filter cartridge, 3, a base, 4, a window part, 5, a test membrane, 6, a gas outlet, 11, an annular boss, 21, an annular groove, 22, an annular boss, 31, a limit groove, 32, a groove, 33, a buckled part, 34, a placing table, 41, a viewing window, 42, a boss, 43, a buckled part, 44, a gas inlet opening, 51, a basal surface, 52, a convex structure, 53 and a reaction part.

Detailed Description

The following description of the embodiments of the present utility model refers to the drawings, but the present utility model is not limited to the embodiments described below, and those skilled in the art can arbitrarily combine, change, add, delete, and the like while satisfying the gist of the present utility model.

Fig. 1 is a perspective view of a gas collection device of the present application. As shown in fig. 1, a gas collection device 100 of the present application has a gas inlet 1, a filter cartridge 2, a base 3, a window portion 4, a test membrane 5, and a gas outlet 6. In fig. 2, an exploded view of the gas collection device 100 is shown. As shown in fig. 2, the base 3 and the window 4 house the test film 5 therein. Specifically, the placement table 34 is formed on the base 3, and the test film 5 is placed on the placement table 34, so that the window 4 can be firmly coupled to the base 3 by fastening the window 4 to the fastened portion 33 of the base 3. In fig. 3 a top view of the gas collection device 100 is shown. In a plan view, as shown in fig. 3, the test film 5 can be observed through the window 41 of the window 4, and thus the test film 5 can be reliably detected through the window 41 using the detection device. In fig. 4, a bottom view of the gas collection device 100 is shown. In the bottom view, as shown in fig. 4, a limit groove 31 is formed in the bottom of the gas collection device 100. By using the limiting groove 31, when the gas collection device 100 with the gas collection is placed on a detection instrument, the gas collection device 100 can be limited, and the spectrum detection device can be aligned to the test membrane 5 when detecting.

In fig. 5, there is shown a longitudinal sectional view of the gas collecting device 100, that is, a view of the gas collecting device taken along a flow direction of gas, in which an annular boss 11 is formed at a left end portion of the gas inlet 1, an annular groove 21 is formed at a right end portion of the filter cartridge 2, and the gas inlet 1 is sealingly coupled to the filter cartridge 2 by fitting the annular boss 11 of the gas inlet 1 into the annular groove 21 of the filter cartridge 2.

An annular boss 22 is formed at the left end of the filter cartridge 2. As shown in fig. 2 and 5, the semicircular groove of the window portion 4 is formed at the right end portion of the window portion 4, specifically, at the position facing the annular boss 22, the semicircular groove of the base 3 is formed at the right end portion of the base 3, specifically, at the position facing the annular boss 22, and after the base 3 and the window portion 4 are engaged, the semicircular groove of the window portion 4 and the semicircular groove of the base 3 together form an annular groove (structure similar to the annular groove 21), whereby, after the base 3 and the window portion 4 are engaged, the annular boss 22 at the left end portion of the filter cartridge 2 can be fitted into the annular groove formed together, and the base 3 and the window portion 4 can be sealingly engaged with the filter cartridge 2 as a whole.

A desiccant can be placed in the cartridge 2 as desired or a material that can filter the matter can be placed accordingly depending on the matter to be filtered.

As shown in fig. 2 and 5, the left end portions of the base 3 and the window portion 4 are also formed with semi-annular grooves, and after the base 3 and the window portion 4 are engaged, the semi-annular grooves of the left end portion of the base 3 and the semi-annular grooves of the left end portion of the window portion 4 together form an annular groove, which can be sealingly engaged with an annular boss formed at the right end portion of the air outlet 6, similarly to the structure of the semi-annular grooves of the right end portion.

Fig. 6 is a structure observed in the case where the gas collection device is observed along the gas inlet. As shown in fig. 6, the intake port 1 has a rectifying plate, and a plurality of through holes are provided in the rectifying plate. By means of the flow straightening plate, the airflow blown out from the mouth of the person can be introduced into the filter cartridge 2 through the air inlet 1 in the form of a uniform and regular airflow. As shown in fig. 2, the window portion 4 has an air inlet opening 44, and gas can be introduced into the reaction chamber formed by the base 3 and the window portion 4 through the air inlet opening 44, and the window portion 4 also has an air outlet opening (not shown), so that gas can be introduced from the reaction chamber to the air outlet 6 through the air outlet opening. The air inlet opening 44 of the window portion 4 can be seen through the through holes on the rectifying plate shown in fig. 6.

Fig. 7 is an A-A view of fig. 5. As described above, the base 3 and the window 4 can be engaged with each other, and a reaction chamber (the reaction chamber can be seen through the through hole shown in fig. 6) is formed inside the engaged base 3 and window 4, so that the test membrane 5 can be accommodated in the reaction chamber. As shown in fig. 7, a placement stage 34 is provided in the middle of the base 3 in the width direction (left-right direction in fig. 7), grooves 32 extending linearly are provided at both ends of the placement stage 34 in the width direction, and the test film 5 is set on the placement stage 34. The length of the test film 5 is longer than the distance between the two grooves 32 in the width direction (left-right direction of fig. 7) of the chassis 3. Thereby, when the test film 5 is placed on the placement table 34, the portions of the test film 5 corresponding to the grooves 32 can be placed into the two grooves 32.

A through hole is provided at a substantially center of the window portion 4, the window 41 is provided at a substantially center of the window portion 4 so as to close the through hole, the window 41 is formed of a transparent material for detecting a reaction surface of the test film 5 via the window 41, the window 41 covers at least a part of the test film 5 when the window portion 4 is projected on a plane in which the test film 5 is located, and more preferably, the window 41 is made to be entirely opposite to the test film 5, and when the window portion 4 is projected on a plane in which the test film 5 is located, the projection of the window 41 is entirely contained in the test film 5 or the projection of the window 41 entirely contains the test film 5 (i.e., the window 41 entirely covers the test film 5). It is further preferred that the test film 5 is completely contained within the projection of the window 41 when the window portion 4 is projected on the plane in which the test film 5 is located. This enables the test film 5 to be detected satisfactorily.

As also shown in fig. 7, when the gas collection device 100 is seen in cross section in a direction orthogonal to the gas flow direction, both ends in the width direction (left-right direction in fig. 7) of the window portion 4 are joined to the base 3, and the window 41 of the window portion 4 is bridged between upper portions of both ends in the width direction of the window portion 4, whereby a space is formed between both ends in the width direction of the window portion 4. In a state where the base 3 and the window 4 can be engaged with each other, as shown in fig. 7, a space surrounded by both ends in the width direction of the window 4, the window 41, and the placement table 34 serves as a reaction chamber for accommodating the test film 5.

At both ends of the window portion 4 in the width direction, specifically, at positions corresponding to the grooves 32 of the base 3, bosses 42 extending in a straight line are provided. As shown in fig. 8, the groove 32 is concave in a curved surface shape, and the boss 42 is convex in a curved surface shape, that is, the cross-sectional shapes of the groove 32 and the boss 42 are curved surface shapes, and the matching surface of the curved surface shapes can increase the contact area and improve the sealing strength. By fitting the linearly extending boss 42 into the linearly extending groove 32, the edge of the test film 5 is sandwiched, and the test film 5 is sealingly sandwiched between the groove 32 and the boss 42. In fig. 7 and 2, only the sealing structure for sealing the edges of the two sides of the test film 5 is shown, and in practice, a sealing structure such as a boss and a groove may be provided for the entire circumference of the test film 5. In addition, instead of sandwiching the test film 5 with the boss and the groove, the boss may be fitted into the groove to seal the test film 5 without sandwiching the test film 5, and the test film 5 may be accommodated inside the boss and the groove, and in this case, for example, the test film 5 may be attached to the placement table 34 by an adhesive. Moreover, the grooves 32 and the bosses 42 may be other than straight, as long as sealing is achieved. Instead of the fitting structure by the grooves and the projections, other structures may be used to seal the test membrane 5. That is, the reaction chamber and the test membrane 5 accommodated in the reaction chamber are sealed so as to communicate only with the gas flow path inside the gas inlet 1 (cartridge 2) and the gas flow path inside the gas outlet 6, and no gas is introduced or discharged at other portions (for example, a portion between the base 3 and the window 4 as a whole and the cartridge 2, a portion between the base 3 and the window 4 as a whole and the gas outlet 6, and the like).

In addition, the fit between the groove 32 and the boss 42 not only serves to seal the test film 5, but also helps to achieve the bonding of the base 3 and the window portion 4. The groove 32 and the boss 42 are fitted together, and the engagement portion 43 (see fig. 5) of the window 4 and the engaged portion 33 (see fig. 5) of the base 3 are engaged with each other. Thus, the base 3 and the window 4 are securely fastened together.

As shown in fig. 5, the gas collecting device 100 is assembled by coupling the gas inlet 1 to the right end portion of the filter cartridge 2, coupling the base 3 and the window portion 4 that are fastened together to the left end portion of the filter cartridge 2 as a whole, and coupling the gas outlet 6 to the left end portion of the base 3 and the window portion 4 that are fastened together.

When the user uses the gas collecting device 100, blowing is performed through the gas inlet 1, and the flow direction of the gas is from right to left in fig. 5, that is, the gas enters the filter cartridge 2 through the rectifying plate of the gas inlet 1. After the unnecessary components are filtered out from the filter cartridge 2, the gas enters a reaction chamber formed by the base 3 and the window 4 through the gas inlet opening 44 of the window 4, reacts with the test membrane 5 in the reaction chamber, completes collection of the gas, and the gas passing through the test membrane 5 is discharged from the reaction chamber through a gas outlet opening, not shown, of the window 4 and enters the gas outlet 6.

The reaction chamber accommodates a test membrane 5, and a gas flow path that communicates between the gas inlet 1 (filter cartridge 2) and the gas outlet 6 is formed inside the reaction chamber as indicated by a broken line arrow in fig. 5. As shown in fig. 5, the gas entering the reaction chamber does not pass through the test membrane 5, but passes through the test membrane 5 along the reaction surface of the test membrane 5, and is discharged after entering the gas outlet 6. The reaction surface of the test film 5 is the surface of the test film 5 on the side of the window portion 4, that is, the upper side surface of the test film 5 in fig. 5, whereby the reaction surface of the test film 5 can be easily detected via the window opening 41 of the window portion 4.

The test film 5 is described in detail below.

Fig. 9 shows the microstructure of the test film 5, specifically, the microstructure of the side (i.e., the reaction surface) of the test film 5 that can be detected through the viewing window 41 of the window portion 4. As shown in fig. 9 and 10, the test film 5 of the present application has a base surface 51 and a plurality of bump structures 52 that protrude from the base surface 51. Within the reaction chamber, the gas entering the reaction chamber passes through the test membrane 5 in a direction parallel to the base surface 51. The gas contacts the substrate surface 51 and produces a relative motion. The protruding structures 52 are circular in plan view, and reaction portions 53 for reacting with the gas are provided on the top surfaces of the plurality of protruding structures 52.

The plurality of convex structures 52 are arranged in the flow direction of the gas, and as an example of the flow direction of the gas, the length direction of the test film 5 may be a direction intersecting the flow direction of the gas, and a plurality of columns of the convex structures 52 may be provided, wherein the "columns" are columns in which the plurality of convex structures 52 are arranged in the flow direction of the gas, and as a direction intersecting the flow direction of the gas, the width direction of the test film 5, that is, the width direction of the test film 5 may be a direction in which a plurality of columns are arranged, each of which is constituted by the convex structures 52.

The number of the convex structures 52 is not particularly limited, and can be appropriately selected according to the components in the gas to be detected, and the convex structures 52 may be formed in one row or in a plurality of rows on the base surface 51, and in the case where a plurality of rows are formed, the number of the convex structures 52 constituting each row may be identical, the number of the convex structures 52 constituting a part of the rows may be identical, the number of the convex structures 52 constituting the rest of the rows may be different, or the number of the convex structures 52 constituting the rest of the rows may be completely different from one row to another.

In the case where the component in the gas to be detected is only one, for example, the component a in the gas to be detected may be collected by one row of the convex structures 52 or may be collected by a plurality of rows of the convex structures 52.

In the case where the components in the gas to be detected are plural, for example, the component a, the component B, …, the component N in the gas to be detected may be collected by one row of the convex structures 52, for example, the component a is collected by the plurality of the convex structures 52 on the upstream side among the plurality of the convex structures 52 constituting one row, the component B is collected by the plurality of the convex structures 52 on the downstream side among the plurality of the convex structures 52 constituting one row, and the component C is collected by the plurality of the convex structures 52 on the upstream side among the plurality of the convex structures 52 constituting another row, and so on, whereby the collection for the components a to N is completed. It is also possible to collect component a with one whole column, component B with another whole column, and so on. Thus, the collection of the components a to N is completed. Of course, it is also possible to detect one component for one protrusion.

Further, in the case of having a plurality of columns of raised structures 52, the raised structures 52 of one column and the raised structures 52 of an adjacent column may be aligned with each other. As shown in fig. 9 and 10, the bump structures 52 of one row may be offset from the bump structures 52 of an adjacent row.

Preferably, the gas reaction chamber of the present application is manufactured while numbering is performed for the plurality of protruding structures 52 specific to the present application, and the numbering is recorded, whereby the inspector can clearly know that different gas components are collected based on the protruding structures 52 of different numbers. In the detection, a detector detects a predetermined gas component by detecting a predetermined number of the convex structures 52 (specifically, the reaction portions 53 on the convex structures 52) through the window 41 of the window 4 by using a spectrum detection device. The material of the reaction portions 53 provided on at least two of the bump structures 52 is different from each other.

Further, in fig. 9 and 10, a case where the convex structure 52 is formed in a cylindrical shape is shown, that is, the convex structure 52 is circular in a top view. However, the shape of the convex structure is not limited to this, and the convex structure may be formed in an elliptical shape in a plan view, and the convex structure may be formed on the base surface 51 such that the major axis direction of the ellipse is parallel to the gas flow direction. The shape of the convex structure in a plan view may be triangular, and the convex structure may be formed on the base surface 51 so that the gas flow direction is perpendicular to the base of the triangle. The base of the triangle refers to a side portion of the triangle located on the downstream side in the gas flow direction.

In the structure of the test membrane 5 shown in fig. 9 and 10 of the present application, the original state of the air flow field is not changed by providing the minute projection structures 52 on the base surface 51. The raised micro-structure can lift the reaction surface over a thicker fluid boundary layer, so that reactant molecules in the gas phase can be easily diffused to the surface of the reaction part 53, and the responsiveness is improved. The shape of the convex structure in plan view is not limited to the three shapes illustrated above, and may be provided on the substrate surface in any shape as long as the flow of the gas is not adversely affected. For example, the protruding structure may be a polygon in plan view, and one ridge line of the protruding structure that is a polygon may face the gas flow direction, that is, a side portion that first contacts the gas is not a side portion perpendicular to the gas flow direction.

The area of the top surface of the raised structure is, for example, 0.01mm ² ～0.05mm ² The height of the protruding structures is, for example, greater than 0mm and equal to or less than 1mm, preferably, the height of the protruding structures is 0.4mm to 1mm, adjacent to each otherThe distance between the raised structures of (a) is for example between 0.3mm and 2.5 mm.

As for the method of manufacturing the bump structure 52, such a bump structure may be realized by, for example, 3D printing, and after the bump structure 52 is formed, the reaction portion 53 is provided on the top surface of the bump structure 52 by an imprint method. In addition, the method of fabricating the bump structure 52 is not limited to 3D printing, and the bump structure 52 can be fabricated by micro-nano processing technology, for example.

The gas flowing through the inside of the reaction chamber is collected by the test membrane 5, and the test membrane 5 can be detected without taking out the gas. As described above, after the user finishes blowing, the gas collection device 100 is placed on a detection instrument, and the detection is performed with the spectral detection device aligned with the test film 5. Therefore, compared with a structure in which gas is collected by the gas bag and then taken out for detection, the operation can be significantly simplified, and the detection of gas can be easily achieved.

The gas collection device 100 may also have a gas amount monitoring unit that can monitor whether or not the amount of gas flowing into the gas amount monitoring unit satisfies a minimum amount (prescribed amount) requirement. According to the gas collection device, the gas quantity monitoring unit is arranged on the gas collection device, so that on the basis of collecting substances in gas, whether the blown-in gas quantity meets the minimum quantity requirement can be monitored, whether the gas quantity collected by the collection unit meets the requirement is monitored, and the detection precision of the gas collection device is improved.

The gas amount monitoring means may be a gas bag connected to the gas outlet 6, and the gas sent from the gas outlet 6 may be collected by the gas bag. The air bag has a predetermined capacity, and is used as a means for quantifying the amount of air to be blown, and the amount of air to be blown can be quantitatively collected. The gas bag after collection of the gas can also be used for detection, for example in a subsequent detection, the predetermined capacity of the gas bag being calculated as one of the parameters.

The air bag or the air outlet 6 can be provided with a one-way valve so as to control the one-way flow of the air, and the air which enters the air bag can be reliably prevented from flowing back to the air collecting device 100. In addition, a pressure sensor or other sensors can be additionally arranged for detecting whether the gas bag collects the needed gas amount, and when the gas bag reaches the required gas amount, the gas bag can give an alarm, and the alarm can be a warning lamp or a buzzer.

The gas amount monitoring means may be a display changing portion in addition to the gas bag. As shown in fig. 11, a display changing portion as a gas amount monitoring unit may be connected to the gas outlet 6. The display changing section has a display area 221, a divided area 220, and a reference area 222. The positions of the display area 221 and the reference area 222 are not limited to the positional relationship shown in fig. 11, and the positions of the two may be interchanged. The display area 221 is, for example, a test paper which changes color by reacting with moisture, carbon dioxide, oxygen, or the like in the gas, and for example, contains a cobalt salt (for example, cobalt chloride CoCl ₂ ) The display area is blue when the gas does not pass through, and absorbs moisture in the gas when the gas passes through, and cobalt chloride forms cobalt chloride hexahydrate CoCl after absorbing water ₂ ·6H ₂ O, which is pink, shows a change in size of, for example, 0.8cm by 2cm, and is used to monitor the amount of gas, for example, lL, that is, when the amount of gas blown in is 1L or more, the display area changes from blue to pink. The area ratio of the reference area to the display area may be 1:1, i.e. the size of the display area may be, for example, 0.8cm by 1cm. The area of the display changing portion and the display area is not limited, and may be appropriately selected according to the specific case.

The reference area 222 is always pink for reference by the user. When the user blows in a sufficient amount of gas (a prescribed amount and above), the display area 221 becomes the same color as the reference area, whereby the user can clearly know whether the blown-in amount of gas reaches the requirement.

The divided area 220 is located between the reference area 222 and the display area 221, and the divided area 220 has a color different from the reference area 22 and the display area 21, for example, a color with a distinct color difference such as black, so that it is easy for a user to compare the reference area 222 with the display area 221.

The display changing portion may have two display areas 221, and the reference area 222 may be located between the two display areas 221 in the flow direction of the gas flowing into the gas amount monitoring unit 10 (for example, in the direction from right to left in fig. 11). Of the two display areas 221, the display area 21 located on the upstream side in the flow direction of the gas is contacted with the gas first, for example, absorbs a large amount of moisture in the gas, and the display area 221 located on the downstream side in the flow direction of the gas is contacted with the gas later, for example, absorbs a small amount of moisture as compared with the display area 221 located on the upstream side.

Therefore, the degree of color change of the display area 221 on the upstream side is greater than that of the display area 221 on the downstream side. The areas of the upstream display area 221 and the downstream display area 221 are appropriately set so that the areas satisfy: when the user observes that the display area 221 on the upstream side becomes the same color as the reference area, it is indicated that the blown-in gas reaches a prescribed amount (minimum requirement), and the blowing can be stopped. When the user observes that the display area 221 on the downstream side becomes the same color as the reference area, it is indicated that the amount of gas blown by the user reaches the highest requirement, and the blowing should be stopped. Of course, the above-described illustrated area is only one example, and the display areas 221 on the upstream side and the downstream side are not limited to the above-described area limitation, and as long as the two display areas 221 are arranged in the flow direction of the gas, that is, have an upstream-downstream relationship with respect to each other, the effect of monitoring the gas to the minimum requirement and not more than the maximum requirement can be achieved.

The gas amount monitoring unit may be disposed in the gas collecting device 100 instead of being connected to the gas outlet 6, as long as the gas can pass through the gas amount monitoring unit and the user can observe the gas amount monitoring unit.

Others

In the above-described coupling of the respective members, for example, a fitting coupling method is adopted between the intake port 1 and the filter cartridge 2, etc., but a screw coupling method may be adopted as well. In the above description, the sealing structure of the test film 5 by the base 3 and the window 4 is a fitting coupling structure in which the boss 42 is fitted into the groove 32, but other coupling structures may be employed between the base 3 and the window 4. For example, a recess capable of accommodating the entire test film 5 is formed in either one of the base 3 and the window 4, and a pressing portion capable of pressing the edge of the test film 5 is formed in the other one of the base 3 and the window 4, and the base 3 and the window 4 are engaged with each other to sealingly accommodate the test film 5 therein.

Alternatively, the grooves 32 and the bosses 42 may be formed in other shapes instead of curved surfaces. Further, as shown in fig. 7, only one groove 32 and one boss 42 are provided on each of the left and right edges of the test film 5 in the drawing, but two or more grooves 32 and the same number of bosses 42 may be formed on at least one edge of the test film 5, whereby two or more pairs of grooves 32 and bosses 42 are formed on at least one edge of the test film 5 with one groove 32 and one boss 42 being a pair, and at least one edge of the test film is sandwiched between two or more pairs of grooves 32 and bosses 42, whereby the sealing effect can be further improved. In the above configuration, the recess 32 is formed in the base 3 and the boss 42 is formed in the window portion 4, but the reverse may be adopted, in which the boss is formed in the base 3 and the recess is formed in the window portion 4.

In the above description, in the structure in which the "view window 41 covers at least a part of the test film 5" and the "test film 5 is completely contained in the projection of the view window 41", the test film 5 refers to a region of the test film 5 that substantially functions to react with the gas, specifically, a region in which the bump structure 52 is formed. The region such as the edge of the test film 5 is not particularly limited in structure as long as it does not affect the detection of the test film 5 by the detection person via the window 41.

The test membrane 5 may collect the gas by physically and/or chemically collecting substances in the gas passing through the gas flow path. Specifically, the test membrane 5 is capable of testing a plurality of substances or a plurality of components in a gas by physical adsorption, chemical reaction, action, or the like. For example, the test membrane 5 is configured to be capable of chemically or physically adsorbing a specific substance in a gas, and when the specific substance is detected to be adsorbed by the test membrane 5 through the window 4 described later, the specific substance contained in the gas can be collected. Alternatively, the test film 5 contains a substance capable of chemically reacting with a specific substance in the gas, and when the chemical reaction of the test film 5 is detected through the window 4 described later, the specific substance contained in the gas can be collected.

The test membrane may be a test paper for measuring diabetes, a test paper for measuring helicobacter pylori, or the like.

Optionally, the test membrane includes a plurality of test areas, and the plurality of test areas are arranged at intervals, and each test area includes a reagent for testing the gas, and the color of the reagent changes after the reagent reacts with a corresponding reactant in the gas.

The reagent comprises: one or more of quantum dot materials, chemical dyes, fluorescent luminescent materials.

The quantum dot materials may include group II-VI CdS, cdSe, cdTe, znS, znSe, pbS, pbSe, III-V InP, gaP, gaN, alN and core-shell structural materials CdS/ZnS, cdSe/CdS, cdSe/ZnS, cdSe/CdS/ZnS, cdTe/CdS/ZnS, znSe/ZnS, inP/GaP/ZnS, carbon quantum dots, perovskite quantum dots, precious metal (e.g., au, ag, etc.) quantum dots, and the like.

The chemical dye can be an acid-base indicator dye, a Lewis acid-base dye, a redox dye and pi-pi conjugated dye.

Specifically, the chemical dye and the fluorescent luminescent material may be: thymol blue, methyl yellow, methyl orange, bromophenol blue, bromocresol green, methyl Red, bromocresol purple, bromocresol blue, neutral Red, phenol Red, phenolphthalein, thymolphthalein, hexanal (DNPH), dinitrophenylhydrazine, copper tetraphenylporphyrin (CuTPP), iron porphyrin (FeTPP), zinc porphyrin (ZnTPP), tetraphenylporphyrin (H2 TPP), methyl Red (Methyl Red), bromophenol Red (Bromophenol Red), bromothymol green (Bromothymol Green), porphyrin, metalloporphyrin Dye, bromoxylenol blue, 4-nitrophenylhydrazine, raschel Dye (Rechardt's Dye), malachite green chloride (Malachite Green Chloride), hydrazino-containing fluorescent molecules, porphyrin manganese.

Claims (10)

1. A gas collection device is characterized in that,

the gas collection device is provided with a gas inlet, a gas outlet and a reaction chamber, wherein the gas inlet is used for allowing gas to enter the reaction chamber, the gas outlet is used for allowing the gas to be discharged from the reaction chamber, the reaction chamber is used for accommodating a test membrane,

a gas flow path communicating the gas inlet and the gas outlet is formed in the reaction chamber, the test membrane is positioned in the middle of the gas flow path and is used for collecting substances in the gas passing through the gas flow path,

the gas flow path is configured as follows: the gas entering the reaction chamber does not pass through the test membrane, but passes through the test membrane along the reaction surface of the test membrane,

the gas collection device further has a window portion through which the reaction surface of the test film can be detected.

2. A gas collection device according to claim 1, wherein,

the gas collection device is also provided with a base, the reaction chamber is formed by combining the base and the window part,

the test membrane is sealingly sandwiched between the base and the window portion.

3. A gas collection device according to claim 2, wherein,

one of the base and the window has a recess,

the other of the base and the window has a boss,

the boss is embedded in the groove to sealingly sandwich the test membrane between the base and the window portion.

4. A gas collection device according to claim 3, wherein,

the grooves and the bosses extend linearly, and/or,

the surface of the boss matched with the groove is a curved surface.

5. A gas collection device according to claim 3 or 4, wherein,

the edge of the test membrane is sandwiched between the groove and the boss.

6. The gas collection apparatus of claim 5, wherein,

with one of the grooves and one of the bosses as a pair,

at least one edge of the test membrane is sandwiched between more than two pairs of the grooves and the lands.

7. A gas collection device according to claim 1, wherein,

the window part is provided with a window, and the window at least covers part of the test film when the window part is projected on the plane of the test film.

8. A gas collection device according to claim 1, wherein,

the gas collection device is also provided with a gas quantity monitoring unit which monitors the quantity of gas entering the gas collection device.

9. A gas collection device according to claim 1, wherein,

the test film includes:

a basal plane, the gas passing through the test membrane in a direction parallel to the basal plane; and

the plurality of protruding structures protrude from the basal plane, and a reaction part for reacting with the gas is arranged on the top surfaces of the plurality of protruding structures.

10. The gas collection device of claim 9, wherein the gas collection device comprises a gas collection tube,

the material of the reaction parts provided on at least two of the protruding structures is different from each other.

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