CN214844830U - Indoor formaldehyde detection device - Google Patents

Abstract

The utility model discloses an indoor formaldehyde detection device, include: the outer tube is used for containing phenol reagent absorption liquid, and the side wall of the outer tube is provided with an air outlet which is externally connected with an air pump; the inner tube can seal the cartridge in the outer tube, and the bottom of inner tube is equipped with ventilative psammitolite, and the bottom of inner tube can stretch into in phenol reagent absorption liquid and through ventilative psammitolite and phenol reagent absorption liquid intercommunication, and the top of inner tube still is equipped with the air inlet. The device realizes the quantitative collection function of the air pump to the indoor air by arranging the air inlet externally connected with the air pump on the outer pipe, and simultaneously, the quantitative air can fully react with the quantitative phenol reagent absorption liquid, thereby ensuring the accuracy of the formaldehyde content detection result; in addition, through setting up ventilative psammitolite in the inner tube, can make the air pass through or diffuse in the phenol reagent absorption liquid in the form of tiny bubble, increase the reaction area of contact of air and phenol reagent absorption liquid, guarantee the reaction efficiency of formaldehyde in the air and phenol reagent absorption liquid, ensure the accuracy of formaldehyde content testing result.

Description

Indoor formaldehyde detection device

Technical Field

The utility model relates to a formaldehyde detects technical field, in particular to indoor formaldehyde detection device.

Background

With the continuous improvement of living standard of people, the requirement for air is higher and higher, however, house decoration and house replacement are more and more common, and as a plurality of adhesives, coatings and paints all contain formaldehyde, pollution gas mainly containing formaldehyde can be volatilized, and harm is caused to human bodies. Among them, formaldehyde has been identified as carcinogenic and teratogenic substances by the world health organization, and chronic respiratory diseases, pregnancy syndromes, leukemia and other diseases can be caused by long-term exposure to formaldehyde, and chromosome abnormality and memory impairment of adolescents, mental retardation and the like can also be caused.

The existing indoor formaldehyde detection method is to adopt a phenol reagent spectrophotometry, introduce indoor air into a phenol reagent, observe the color change of the phenol reagent and compare the color change with a colorimetric card, and determine the content of formaldehyde in the indoor air according to the shade of the color of the phenol reagent solution.

At present, the indoor formaldehyde detection is usually carried out by a professional detection mechanism, the detection cost is high, and the method is not suitable for household use. Most of the existing formaldehyde content detection devices for household use are formaldehyde direct readers and formaldehyde test boxes, the formaldehyde direct readers mostly adopt electrochemical sensors, the air quantity absorbed by the formaldehyde direct readers is small, and the persuasiveness and accuracy of detection results are difficult to ensure; the formaldehyde test box is generally used for directly placing and exposing a part filled with the phenol reagent absorption liquid to indoor air, and a specific air collection step is lacked, so that the indoor air with an insufficient volume and sufficient reaction with the phenol reagent absorption liquid are not obtained, and the detection result is difficult to represent. The two household formaldehyde content detecting instruments cannot ensure the accuracy of the detection result.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an indoor formaldehyde detection device, its simple structure can guarantee the accuracy of indoor air formaldehyde content testing result.

According to the utility model discloses indoor formaldehyde detection device, include: the outer tube is used for containing phenol reagent absorption liquid, and the side wall of the outer tube is provided with an air outlet which is externally connected with an air pump; the inner pipe can be plugged into the outer pipe in a sealing mode, a breathable sand core is arranged at the bottom of the inner pipe, the bottom of the inner pipe can extend into the phenol reagent absorption liquid and is communicated with the phenol reagent absorption liquid through the breathable sand core, and an air inlet is further formed in the top of the inner pipe.

According to the utility model discloses indoor formaldehyde detection device has following beneficial effect at least:

when the device is used, a user firstly pours a quantitative phenol reagent absorption liquid into the outer tube to be contained, then the inner tube is hermetically inserted in the outer tube, the bottom end of the inner tube is extended into the phenol reagent absorption liquid, then the air outlet on the outer tube is connected with the air pump, finally the air pump is started, the air pump can pump a quantitative indoor air, under the action of the air pump, the indoor air enters the inner tube from the air inlet, then passes through the air-permeable sand core of the inner tube to enter the phenol reagent absorption liquid and chemically reacts with the phenol reagent absorption liquid, so that the quantitative indoor air and the quantitative phenol reagent absorption liquid fully react, after the indoor air and the phenol reagent absorption liquid react, the user can add a pre-prepared color developing agent into the reacted mixed solution to develop the color of the mixed solution, and then the color of the developed mixed solution is compared with the colorimetric card in color, thereby obtaining the concentration or content of formaldehyde in the indoor air. The whole device is simple in structure and convenient to operate, the air inlet of the external air pump is arranged on the outer pipe, the quantitative collection function of the air pump on indoor air is realized, meanwhile, quantitative air can be fully reacted with quantitative phenol reagent absorption liquid, and the accuracy of a formaldehyde content detection result is ensured; in addition, this device is through setting up ventilative psammitolite in the inner tube, can make the air pass through or diffuse with tiny bubble form in phenol reagent absorption liquid, increases the reaction area of contact of air and phenol reagent absorption liquid, guarantees the reaction efficiency of formaldehyde in the air and phenol reagent absorption liquid, further ensures the accuracy of formaldehyde content testing result.

According to some embodiments of the utility model, ventilative psammitolite inlay on the internal perisporium of inner tube, a plurality of through-holes have on the ventilative psammitolite.

According to some embodiments of the utility model, ventilative psammitolite is circular, just ventilative psammitolite's external diameter with the internal diameter looks adaptation of inner tube.

According to some embodiments of the present invention, the outer tube is a round tube with a thick upper part and a thin lower part, and the outer diameter of the inner tube is smaller than the minimum inner diameter of the outer tube.

According to some embodiments of the present invention, the upper portion of the outer tube forms an air containing cavity, the air outlet is provided on the side wall of the air containing cavity and communicates with the air containing cavity.

According to some embodiments of the present invention, the outer tube has an inner burr at a top thereof, and the inner tube has an outer burr thereon cooperating with the inner burr.

According to some embodiments of the utility model, the interior mill mouthful with the outer mill mouthful all is the shape of falling loudspeaker.

According to some embodiments of the utility model, its characterized in that, be equipped with the scale mark on the outer tube.

According to some embodiments of the invention, the outer tube and the inner tube are made of glass.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of an outer tube in an embodiment of the present invention;

fig. 3 is a schematic structural view of an inner tube in an embodiment of the present invention;

fig. 4 is a schematic structural view of a color chart according to an embodiment of the present invention.

Wherein: the color comparison device comprises an outer pipe 100, an air outlet 110, an inner grinding opening 120, an inner pipe 200, an air inlet 210, an outer grinding opening 220, a breathable sand core 300, an air containing cavity 400, an air pump 500 and a color comparison card 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the present number, and the terms greater than, less than, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the utility model discloses an indoor formaldehyde detection device, including outer tube 100 and inner tube 200, wherein, outer tube 100 is used for holding phenol reagent absorption liquid, is equipped with the gas outlet 110 that is used for external air pump 500 on the lateral wall of outer tube 100, but inner tube 200 seal cartridge in outer tube 100, and the bottom of inner tube 200 is equipped with ventilative psammitolite 300, and the bottom of inner tube 200 can stretch into in the phenol reagent absorption liquid and through ventilative psammitolite 300 and phenol reagent absorption liquid intercommunication, and the top of inner tube 200 still is equipped with air inlet 210.

It is understood that, generally speaking, 5ml of phenol reagent absorption liquid needs to react with 10L of air to complete and fully react the phenol reagent absorption liquid and the air, so that the accuracy of the formaldehyde content detection can be ensured.

Obviously, when the device is used, a user can pour the phenol reagent absorption liquid with the concentration of 0.05-1 g/L and the volume of 5ml into the outer tube 100 for containing, then the inner tube 200 is inserted into the outer tube 100 in a sealing mode, the bottom end of the inner tube 200 extends into the phenol reagent absorption liquid, the breathable sand core 300 on the bottom of the inner tube 200 is immersed in the phenol reagent absorption liquid, air can pass through the phenol reagent absorption liquid in a bubble mode or can diffuse in the phenol reagent absorption liquid, the reaction area of formaldehyde in the air and the phenol reagent absorption liquid is increased, and the reaction efficiency is improved.

The user connects the air outlet 110 of the outer tube 100 to the air pump 500, and finally turns on the air pump 500, the air pump 500 can pump 10L of indoor air, specifically, in one embodiment, the flow rate of the air pump 500 is 0.5L/min, and the air pump 500 can pump 10L of indoor air within 20 min.

Under the action of the air pump 500, the indoor air enters the inner tube 200 from the air inlet 210, then passes through the air-permeable sand core 300 of the inner tube 200, enters the phenol reagent absorption liquid, and chemically reacts with the phenol reagent absorption liquid, so that the indoor air with the volume of 10L and the phenol reagent absorption liquid fully react, after the indoor air and the phenol reagent absorption liquid react, a user can add a color developing agent with the volume of 0.4ml prepared in advance to the reacted mixed solution to enable the mixed solution to develop color, the color developing agent is usually an ammonium ferric sulfate solution, and the user compares the color of the mixed solution after the color development with the color chart 600 to obtain the concentration or the content of formaldehyde in the indoor air. Specifically, referring to fig. 4, the color chart 600 includes 20 series of concentrations ranging from 0.01 mg/cubic meter to 0.20 mg/cubic meter, each series of concentrations increases by 0.01 mg/cubic meter, the color comparison range is wide, and the user can intuitively and accurately obtain the formaldehyde content or concentration in the air.

Obviously, this indoor formaldehyde detection device simple structure and convenient operation through set up the air inlet 210 of external air pump 500 at outer tube 100, have realized that air pump 500 gathers the function to the ration of room air, simultaneously, can be so that quantitative air and quantitative phenol reagent absorption liquid fully react, guarantee formaldehyde content testing result's accuracy.

In addition, this device is through setting up ventilative psammitolite 300 in inner tube 200, can make the air pass through or diffuse in the phenol reagent absorption liquid with the tiny bubble form, increases the reaction area of contact of air and phenol reagent absorption liquid, guarantees the reaction efficiency of formaldehyde in the air and phenol reagent absorption liquid, further ensures the accuracy of formaldehyde content testing result.

In some embodiments of the present invention, referring again to fig. 1 and 3, in order to make the air-permeable sand core 300 stably located at the bottom of the inner tube 200, the air-permeable sand core 300 is embedded on the inner peripheral wall of the inner tube 200, and the air-permeable sand core 300 has a plurality of through holes. It should be understood that the inner tube 200 is a through tube, and both the upper end and the lower end of the inner tube 200 have openings, in this embodiment, the air-permeable sand core 300 is circular, and the outer diameter of the air-permeable sand core 300 is adapted to the inner diameter of the inner tube 200, that is, the air-permeable sand core 300 is completely inserted into the opening at the bottom of the inner tube 200, so that the air-permeable sand core 300 can cover the opening at the bottom of the inner tube 200, and air is prevented from entering the phenol reagent absorption liquid without passing through the air-permeable sand core 300.

It is understood that the air-permeable sand core 300 has a plurality of air-permeable through holes, and the air passing through the air-permeable through holes of the air-permeable sand core 300 forms tiny air bubbles to enter the phenol reagent absorbent and react with the phenol reagent absorbent. Obviously, through the design of ventilative psammitolite 300, can ensure that the air forms the bubble that the figure is more and the external diameter is comparatively tiny and gets into phenol reagent absorption liquid, to a great extent increased the area of contact of air with phenol reagent absorption liquid, further improved the reaction efficiency of the formaldehyde of air and phenol reagent absorption liquid, guaranteed the accuracy of formaldehyde detection.

In some embodiments of the present invention, referring to fig. 1, 2 and 3 again, in order to prevent the phenol reagent absorption liquid from being sucked back into the air pump 500 in the process that the air pump 500 pumps the air into the outer tube 100, the outer tube 100 is a round tube with a thick upper part and a thin lower part, the outer diameter of the inner tube 200 is smaller than the minimum inner diameter of the outer tube 100, and the upper part of the outer tube 100 forms the air containing cavity 400, and the air outlet 110 is disposed on the side wall of the air containing cavity 400 and is communicated with the air containing cavity 400.

It is understood that the outer tube 100 is composed of a thick section at the upper part and a thin section at the lower part, the thick section and the thin section are in smooth transition connection and are integrally formed, the cavity of the thick section is the air containing cavity 400, the phenol reagent absorption liquid is contained in the thin section at the lower part, when the air pump 500 is started to extract and collect air, the indoor air enters the phenol reagent absorption liquid from the air inlet 210 at the top of the inner tube 200, the phenol reagent absorption liquid absorbs formaldehyde in the air and completes reaction with the formaldehyde, the air without the formaldehyde is completely absorbed into the air pump, and due to the design of the thick upper part and the thin lower part of the outer tube 100, a larger air containing space is arranged above the phenol reagent absorption liquid, the phenomenon that the phenol reagent absorption liquid is sucked backwards under the action of the air pump is prevented, and the accuracy of the formaldehyde content detection result is further ensured.

In some embodiments of the present invention, referring to fig. 2 and 3 again, in order to facilitate the sealing connection between the outer pipe 100 and the inner pipe 200, the top of the outer pipe 100 has an inner grinding opening 120, and the inner pipe 200 has an outer grinding opening 220 matching with the inner grinding opening 120. Specifically, the inner burr 120 and the outer burr 220 are both in the shape of an inverted horn.

Obviously, the matching design of the inner burr 120 and the outer burr 220 facilitates the matching assembly between the outer tube 100 and the inner tube 200, and also ensures the air tightness therebetween.

Furthermore, some embodiments of the present invention are provided with scale marks on the outer tube 100, so that the outer tube 100 contains a quantitative phenol reagent absorption liquid, thereby improving the accuracy of the formaldehyde content detection result. In addition, the outer tube 100 and the inner tube 200 are made of glass, and in this embodiment, the outer tube 100 and the inner tube 200 are made of transparent glass, so that a user can conveniently observe the internal conditions of the outer tube 100 and the inner tube 200 in real time.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. The utility model provides an indoor formaldehyde detection device which characterized in that includes:

the outer tube is used for containing phenol reagent absorption liquid, and the side wall of the outer tube is provided with an air outlet which is externally connected with an air pump;

the inner pipe can be plugged into the outer pipe in a sealing mode, a breathable sand core is arranged at the bottom of the inner pipe, the bottom of the inner pipe can extend into the phenol reagent absorption liquid and is communicated with the phenol reagent absorption liquid through the breathable sand core, and an air inlet is further formed in the top of the inner pipe.

2. The indoor formaldehyde detection device according to claim 1, wherein the air-permeable sand core is embedded on the inner peripheral wall of the inner pipe, and the air-permeable sand core is provided with a plurality of through holes.

3. The indoor formaldehyde detection device according to claim 2, wherein the air-permeable sand core is circular, and the outer diameter of the air-permeable sand core is matched with the inner diameter of the inner pipe.

4. The indoor formaldehyde detecting device according to claim 1, wherein the outer tube is a round tube with a thick upper part and a thin lower part, and the outer diameter of the inner tube is smaller than the minimum inner diameter of the outer tube.

5. The indoor formaldehyde detecting device according to claim 4, wherein an air containing cavity is formed at the upper part of the outer tube, and the air outlet is arranged on the side wall of the air containing cavity and communicated with the air containing cavity.

6. The indoor formaldehyde detecting device according to claim 1, wherein an inner ground is provided at a top of the outer tube, and an outer ground matched with the inner ground is provided on the inner tube.

7. The indoor formaldehyde detecting device according to claim 6, wherein the inner ground and the outer ground are in an inverted horn shape.

8. The indoor formaldehyde detecting device according to any one of claims 1 to 7, wherein the outer tube is provided with scale marks.

9. The indoor formaldehyde detecting device according to any one of claims 1 to 7, wherein the outer tube and the inner tube are made of glass.

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