CN209927727U - Formaldehyde detection device - Google Patents
Formaldehyde detection device Download PDFInfo
- Publication number
- CN209927727U CN209927727U CN201920165095.0U CN201920165095U CN209927727U CN 209927727 U CN209927727 U CN 209927727U CN 201920165095 U CN201920165095 U CN 201920165095U CN 209927727 U CN209927727 U CN 209927727U
- Authority
- CN
- China
- Prior art keywords
- detection
- formaldehyde
- container
- air
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The utility model provides a formaldehyde detection device belongs to formaldehyde detection technical field, and it includes: the device comprises a sampling device, a detection container, a light source, a photoelectric detection module and a processor; the sampling device is used for acquiring sampling gas flowing into the detection container; the detection container is used for containing detection liquid which reacts with the sampling gas, and the formaldehyde substance in the sampling gas changes the color of the detection liquid; the light source is used for irradiating the detection liquid; the photoelectric detection module is used for detecting the light intensity of the light source irradiating the detection liquid; the processor is used for obtaining the concentration of the formaldehyde in the sampling gas according to the change of the light intensity of the detection liquid after the color changes. The formaldehyde detection device has the characteristics of simple structure, convenience in side detection, high anti-interference capability and accurate detection precision, can quickly detect the concentration of formaldehyde in the sampled gas, and is suitable for field detection of various formaldehyde.
Description
Technical Field
The utility model relates to a formaldehyde detects technical field, concretely relates to formaldehyde detection device.
Background
Along with the continuous improvement of environmental protection consciousness of people, the formaldehyde detection has received close attention of the public. Particularly, in the indoor environment, the requirement of people on the indoor air quality after decoration is higher and higher, and the formaldehyde exceeding phenomenon can occur in a plurality of furniture or decoration materials, which directly affects the human health, so that the detection of the formaldehyde in the indoor environment is particularly important.
The existing instrument for detecting formaldehyde mostly adopts a spectrum instrument, is large in size, is not easy to carry, and has strict requirements on working environment conditions, so that the instrument is difficult to apply to field detection. And some small formaldehyde detection device to avoid outside air to flow into the detection zone from the device around and cause the influence in advance to the testing result, so comparatively complicated with detection device's inner structure design to it is loaded down with trivial details to lead to the equipment procedure of processing, has increaseed working cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a formaldehyde detection device for detect formaldehyde concentration, have simple structure, detect characteristics convenient, that the interference killing feature is strong, be applicable to various formaldehyde witnessed inspections.
Based on the above purpose, the utility model provides a formaldehyde detection device, including sampling device, detection container, light source, photoelectric detection module and treater;
the sampling device is used for acquiring the sampling gas flowing into the detection container;
the detection container is used for containing detection liquid which reacts with the sampling gas, and the formaldehyde substance in the sampling gas changes the color of the detection liquid;
the light source is used for irradiating the detection liquid;
the photoelectric detection module is used for detecting the light intensity of the light source irradiating the detection liquid;
and the processor is used for acquiring the concentration of the formaldehyde in the sampling gas according to the change of the light intensity of the detection liquid after the color is changed.
Further, the detection container comprises an air inlet and an air outlet, the air inlet is communicated with an air inlet pipeline, and the air inlet pipeline extends into the detection liquid.
Further, the air inlet and the air outlet are arranged correspondingly, and the sealing device can be used for opening or closing the air inlet and the air outlet.
Further, the sealing device comprises an air guide cover body and a sealing body;
the air guide cover body is provided with a first air guide cavity communicated with the sampling device and the air inlet and a second air guide cavity communicated with the air outlet and the outside;
the first air guide cavity and the second air guide cavity are internally provided with one sealing body respectively, and the sealing bodies can open or close the air inlet and the air outlet.
Furthermore, the first air guide cavity and the second air guide cavity are arranged in the same air guide hood body and are separated by a partition plate;
or the first air guide cavity and the second air guide cavity are respectively arranged in one air guide cover body.
Furthermore, the sealing device comprises a guide rod, the guide rod penetrates through the air guide cover body and is respectively connected with the sealing body corresponding to the air guide cavity, and the guide rod is driven to drive the sealing body to move in the air guide cavity so as to open or close the air inlet and the air outlet.
Furthermore, a plurality of guide ribs arranged at intervals are arranged on the peripheral side of the sealing body and are used for being in sliding fit with the inner wall of the first air guide cavity or the inner wall of the second air guide cavity.
Further, the formaldehyde detection device comprises an outer shell, a limiting mechanism is arranged between the outer shell and the sealing device, and the limiting mechanism comprises a first limiting body arranged on the side wall of the sealing device and a second limiting body arranged on the inner wall of the outer shell;
when the sealing device moves towards the detection container, the first limiting body is clamped with the second limiting body, and the sealing device seals the air inlet and the air outlet.
Furthermore, an unlocking button is arranged on the side wall of the outer shell and can be in contact with the first limiting body to enable the first limiting body to be disengaged from the second limiting body.
The container frame is arranged in the outer shell and used for accommodating the detection container, a light incident port is formed in one side wall of the container frame corresponding to the detection container, and a light emergent port is formed in the other opposite side wall of the container frame corresponding to the light incident port;
the elastic support piece is arranged between the bottom of the detection container and the bottom of the container frame, and the top of the detection container is abutted against the inner wall of the top of the container frame through the elastic support piece.
Further, the formaldehyde detection device comprises an elastic resetting piece, the elastic resetting piece is limited between the sealing device and the top of the container frame, and the elastic resetting piece enables the sealing device to move towards the direction far away from the detection container.
Further, a support frame for carrying the light source and the photoelectric detection module is included, the support frame is disposed in the outer shell, and the support frame is disposed on two opposite sides of the container frame.
Furthermore, braced frame is the PCB board, the PCB board with the inner wall of shell body passes through rib detachably and connects.
Furthermore, a taking and placing opening is formed in one side, opposite to the detection container, of the outer shell, the outer shell comprises a sealing cover matched with the taking and placing opening, and a stop block is arranged between the sealing cover and the detection container.
Adopt above-mentioned technical scheme, the utility model provides a formaldehyde detection device's technological effect has:
1. the whole structure is simple, the formaldehyde concentration in the sampling gas can be rapidly detected, the side detection process is convenient, and the popularization and the application are facilitated;
2. utilize collection system can acquire the sample gas in arbitrary detection ring border, after sample gas gets into and detects the liquid, detect the formaldehyde material in liquid and the sample gas and react in detecting the container, avoid receiving external factor interference, the precision that the guarantee detected has improved the interference killing feature who detects, is applicable to all kinds of formaldehyde witnessed inspections.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described 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 creative efforts.
Fig. 1 is a schematic perspective view of a formaldehyde detecting device provided in an embodiment of the present invention;
fig. 2 is a front view of a formaldehyde detecting device provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
fig. 4 is a top view of a formaldehyde detecting device provided in an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken at B-B of FIG. 4;
fig. 6 is a schematic structural diagram of an air guide hood in the formaldehyde detecting device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a sealing body in the formaldehyde detecting device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first limiting body in the formaldehyde detecting device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a sealing gasket in the formaldehyde detecting device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a supporting frame in the formaldehyde detecting device according to an embodiment of the present invention.
Reference numerals: 100. the device comprises an outer shell, 101, a supporting frame, 102, a container frame, 103, an elastic supporting piece, 104, a guide frame, 105, an elastic resetting piece, 106, a taking and placing opening, 107, ribs, 108, a connecting groove, 200, a sampling device, 210, an air duct, 220, an air exhaust pipe, 300, a detection container, 301, an air inlet opening, 302, an air outlet opening, 303, an air inlet pipeline, 305, a sealing gasket, 306, a gap, 400, a light source, 401, a photoelectric detection module, 402, a processor, 403, a controller, 500, a display screen, 600, a sealing device, 610, an air guide cover body, 611, a first air guide cavity, 612, a second air guide cavity, 620, a sealing body, 621, a guide rib, 630, a guide rod, 631, a sealing ring, 640, a moving button, 650, a transmission rod, 660, a first limiting body, 661, a first split plate, 662, a second split plate, 663, a first limiting block, 670, a second, 700. unlock button, 800 function button, 900 cover, 910 stop.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to fig. 5, an embodiment of the present invention provides a formaldehyde detecting apparatus, which includes a sampling device 200, a detecting container 300, a light source 400, a photoelectric detection module 401, and a processor 402.
The sampling device 200 is used for acquiring a sampling gas in an environment to be detected, and then enabling the sampling gas to flow into the detection container 300 to participate in a chemical reaction;
a detection liquid is contained in the detection container 300; preferably, the core component of the detection liquid is an organic matter containing an aminoketene functional group, and the organic matter is used for reacting with a formaldehyde substance in the sampling gas provided by the acquisition device to change the color of the detection liquid;
the light source 400 is used for irradiating the detection liquid in the detection container 300;
the photoelectric detection module 401 is used for collecting the intensity of light reflected by the detection liquid and converting the intensity of the light into an electric signal;
the processor 402 is configured to receive the electrical signals, convert the electrical signals into digital signals, and convert the digital signals into formaldehyde concentration according to a standard curve method. It should be noted that the standard curve method is a concentration calculation method commonly used in the prior art, and the conversion of the digital signal to the formaldehyde concentration can be realized by using the existing processing calculation method, so a specific processing algorithm is not described in this application.
Adopt the formaldehyde detection device of above-mentioned structure, have following effect:
1. overall structure is simple, can detect the formaldehyde concentration in the sampling gas fast to it is convenient to examine the side process, more does benefit to popularization and application.
2. Utilize collection system can acquire sampling gas in arbitrary detection ring border to make sampling gas flow in to detecting the liquid and react, because the reaction of detecting the formaldehyde material in liquid and the sampling gas is gone on in detecting the container, avoid receiving external factor interference, the precision of guarantee detection has improved the interference killing feature who detects, is applicable to all kinds of formaldehyde witnessed inspections.
Specifically, as shown in fig. 5, the sampling device 200 preferably uses a sampling pump, which has the characteristics of easy operation and accurate quantification.
The detection container 300 is preferably arranged as a bottle body, and has the characteristic of convenient taking and placing; the top of the detection container 300 is respectively provided with an air inlet 301 and an air outlet 302; the gas inlet 301 is used for introducing sampling gas obtained by the acquisition device 200, and the gas outlet 302 is used for discharging gas after reaction with the detection liquid.
In the embodiment of the present application, the number of the air inlets 301 and the number of the air outlets 302 are preferably set to be one, and of course, the number of the air inlets 301 and the number of the air outlets 302 may be increased as needed in actual application.
Be provided with inlet line 303 in detecting container 300, inlet line 303 one end and the air inlet 301 intercommunication that detects container 300, the other end stretches into to detecting in the liquid, utilizes inlet line 303 to directly introduce sampling gas to detecting in the liquid, and the guarantee sampling gas can fully react with detecting the liquid.
In one embodiment of the present application, the formaldehyde detecting apparatus further includes a sealing device 600, and the sealing device 600 is connected to the detecting container 300.
When the sampling device 200 works, the air inlet 301 and the air outlet 302 are opened by the sealing device 600, and sampling gas is introduced into the detection liquid for reaction through the air inlet 301 and the air inlet pipe 303 in sequence by the sampling device; the reacted gas is discharged to the outside of the detection container 300 through the gas outlet 302;
when the sampling device 200 stops working, the sealing device 600 is used for sealing the air inlet 301 and the air outlet 302, so as to isolate the detection liquid from the outside air, avoid the reaction between the outside air and the detection liquid, and protect the detection performance of the detection liquid from being influenced by the outside air.
To facilitate the adjustment of the opening and closing of the air inlet 301 and the air outlet 302 of the inspection container 300, as shown in fig. 5, in one embodiment of the present application, the sealing device 600 includes an air guide enclosure 610 and a sealing body 620.
Referring to fig. 3 and 6, the sampling device 200 is connected to the airway mask 610 through the airway tube 210; for introducing a sampling gas into the gas guide hood 610;
the air guide housing 610 defines a first air guide chamber 611 communicating with the sampling device 200 and the air inlet 301, and a second air guide chamber 612 communicating with the air outlet 302 and the outside;
the number of the air guide hood 610 may be set to one or more;
when the air guide housings 610 are arranged in one, the first air guide cavity 611 and the second air guide cavity 612 are arranged in the same air guide housing 610, and the first air guide cavity 611 and the second air guide cavity 612 are isolated by the isolation plate and are not communicated with each other. The first air guide cavity 611 is used as a sample gas transfer space, and the sample gas passes through the first air guide cavity 611, then sequentially passes through the air inlet 301 and the air inlet pipe 303, and finally enters the detection container 300; the sampling gas reacts with the detection liquid in the detection container 300, and then the reacted gas is discharged through the gas outlet 302 and the second gas guide chamber 612.
When two air guide housings 610 are provided, as shown in fig. 5, in a preferred embodiment of the present application, a first air guide cavity 611 and a second air guide cavity 612 are respectively provided in one air guide housing 610, that is, the first air guide cavity 611 is provided in one air guide housing 610, and the second air guide cavity 612 is provided in the other air guide housing 610. The first air guide cavity 611 is also communicated with the air guide tube 210 and the air inlet 301 of the detection container 300, and the second air guide cavity 612 is communicated with the air outlet 302 of the detection container 300, and the working principle of the air guide cavity is the same as that of the air guide cover body, and the description is omitted here.
Of course, in practical application, the number of the air guide hood body 610 may be adjusted according to the number of the air inlets 301 and the air outlets 302, and may be set to be more than three, so as to meet the use requirement.
In this embodiment, a sealing body 620 is provided in each of the first air guide chamber 611 and the second air guide chamber 612, and the air inlet 301 and the air outlet 302 are opened or closed by the sealing body 620.
In this embodiment, the first air guide chamber 611 and the second air guide chamber 612 are preferably provided in a cylindrical shape, the sealing body 620 is provided in an ellipsoidal shape, and a tip portion of the sealing body 620 can protrude into the air inlet 301 or the air outlet 302, thereby sealing the air inlet 301 and the air outlet 302.
In one embodiment, as shown in fig. 7, the peripheral side of the sealing body 620 is further provided with a plurality of guiding ribs 621 arranged at intervals, and the guiding ribs 621 isolate a space for containing gas between the sealing body 620 and the inner walls of the first and second gas guiding cavities 611 and 612 on one hand, so that the sampling gas enters the detection container 300 through the space or the reacted gas is discharged into the space through the gas outlet 302.
On the other hand, the guiding ribs 621 can be in sliding fit with the inner walls of the first air guiding cavity 611 or the second air guiding cavity 612, so that the sealing body 620 can move along the height direction of the inner walls of the first air guiding cavity 611 and the second air guiding cavity 612, and the guiding effect on the moving direction of the sealing body 620 is achieved.
Adopt sealing device 600 of above-mentioned structure, utilize seal 620 to switch on or seal the regulation respectively to detecting air inlet 301 and gas vent 302 of container 300 in first air guide cavity 611 and second air guide cavity 612, neither can influence the detection use that detects liquid, can also seal air inlet 301 and gas vent 302 after detecting finishing for detect liquid and keep apart with the outside air, reach the purpose of preserving and detecting liquid.
In addition, in order to facilitate the gas after the reaction to be discharged to the outside of the second air guide cavity 612, the formaldehyde detecting device provided in this embodiment further includes an exhaust pipe 220, the exhaust pipe 220 is communicated with the second air guide cavity 612, and the exhaust pipe 220 is used for discharging the gas after the reaction.
In order to better adjust the sealing body 620, as shown in fig. 5, in one embodiment of the present application, the sealing device 600 further includes a guide bar 630, the guide bar 630 penetrates through the air guide housing 610 and is connected to the sealing body 620 in the first air guide cavity 611 and the second air guide cavity 612, respectively, and the guide bar 630 is driven to drive the sealing body 620 to move up and down in the corresponding air guide cavity to open or close the air inlet 301 and the air outlet 302.
In consideration of the sealing performance between the guide bar 630 and the air guide hood body 610, as shown in fig. 5 and 7, a sealing ring 631 is disposed at one end of the guide bar 630 near the sealing body 620, and the sealing ring 631 is disposed in the first air guide chamber 611 or the second air guide chamber 612, when the air inlet 301 or the air outlet 302 is in the open state, the guide bar 630 moves in a direction away from the air inlet 301 or the air outlet 302, so that the sealing ring 631 can seal the penetrating position at the top of the air guide hood body 610, and the sealing performance in the two air guide chambers is ensured while the position of the sealing body 620 is adjusted.
To facilitate the adjustment of the guide bar 630, as shown in fig. 3, in one embodiment of the present application, the sealing device 600 further includes a moving button 640 and a transmission bar 650, the moving button 640 is connected to the guide bar 630 through the transmission bar 650;
when the moving button 640 is pressed, the transmission lever 650 pushes the guide lever 630, and the guide lever 630 pushes the sealing body 620 to move toward the air inlet 301 and the air outlet 302 to close the air inlet 301 and the air outlet 302.
When the moving button 640 is reset, the transmission rod 650 drives the guide rod 630 and the sealing body 620 to move away from the air inlet 301 and the air outlet 302, so as to open the air inlet 301 and the air outlet 302.
In addition, as shown in fig. 9, in order to better achieve sealing and prevent the formaldehyde detection device from causing the detection liquid to overflow from the detection container 300 into the first air guide cavity 611 and the second air guide cavity 612 during the moving process, a sealing gasket 305 may be further disposed at the air inlet 301 and/or the air outlet, the sealing gasket 305 is preferably made of a soft rubber material, a micro gap 306 is disposed in the center of the sealing gasket 305, and the gap 306 may be cross-shaped.
When the formaldehyde detection device does not work, namely when the sealing body 620 seals the air inlet 301 and the air outlet 302, the sealing body 620 abuts against the sealing gasket 305, the gap 306 is opened to enable the sealing gasket 305 to radially wrap the sealing body 620, the detection liquid is prevented from leaking to the outside of the detection container 500, and the flow of the adopted gas is also prevented. When the formaldehyde detection device works (the device cannot be easily moved), the sealing body 620 is far away from the air inlet 301 and the air outlet 302, the sealing body 620 does not prop against the sealing gasket 305, and the gap 306 enables the sampling gas or the gas after the reaction with the detection liquid to normally pass through. This serves to allow the sample gas or the gas after reaction with the detection liquid to pass through the slit 306, and to block the detection liquid from leaking out of the detection container 500.
The formaldehyde detector of the present application is further provided with an outer case 100, and the outer case 100 serves to house the above-described components such as the sampling device 200, the detection container 300, the light source 400, the photodetection module 401, the processor 402, and the sealing device 600. Due to the use of the outer shell 100, the whole formaldehyde detection device has the characteristic of easy carrying.
The outer casing 100 can adopt an integral structure or a split structure, in this embodiment, the outer casing 100 preferably adopts the split structure, which includes a front casing and a rear casing, the front casing and the rear casing are assembled by screws or buckles, the outer casing 100 of the split structure has the characteristics of convenient disassembly and assembly, thereby facilitating the maintenance or replacement of the equipment inside the outer casing 100.
A card slot for accommodating the moving button 640 is disposed at the top of the outer casing 100, so that a user can conveniently manipulate the moving button 640.
In order to enable the sealing device 600 to continuously seal the air inlet 301 and the air outlet 302 of the detection container 300 in a state where the formaldehyde detector is not in operation, in one embodiment of the present application, a stopper mechanism is provided between the outer case 100 and the sealing device 600.
Specifically, as shown in fig. 3, the stopper mechanism includes a first stopper 660 provided on a side wall of the sealing device 600, and a second stopper 670 provided on an inner wall of the outer case 100; preferably, the first stopper 660 is disposed on a side wall of the moving button 640, the second stopper 670 is disposed on an inner wall of the outer case 100 opposite to the first stopper 660, and by pressing the moving button 640, the first stopper 660 and the second stopper 670 can be engaged, so that the position of the moving button 640 is maintained in a pressed state, and thus the two sealing bodies 620 are maintained in a state of closing the air inlet 301 and the air outlet 302, thereby ensuring the isolation and sealing of the detection liquid in the detection container 300 from the outside air.
In a specific implementation, as shown in fig. 3 and 8, the first stopper 660 is formed in a V-shaped structure formed by a first split plate 661 and a second split plate 662, the first split plate 661 is connected to a side wall of the moving button 640 at one end and is connected to one end of the second split plate 662 at the other end, the first split plate 661 and the second split plate 662 have certain elasticity, the first stopper 663 is formed at the other end of the second split plate 662, and the second stopper 670 is connected to a side wall of the outer case 100.
When the moving button 640 is pressed down, the moving button 640 moves towards the detection container 300 until the two sealing bodies 620 respectively seal the air inlet 301 and the air outlet 302, the second limiting body 670 can contact with the first limiting block 663 and apply pressure to the second split plate 662 to enable the second split plate 662 to move towards the first split plate 661, when the first limiting block 663 moves to a position below the second limiting body 670, the second split plate 662 releases the pressure to return to the original position, so that the first limiting block 663 is clamped below the second limiting body 670, the position of the moving button 640 is locked, and the air inlet 301 and the air outlet 302 of the detection container 300 are continuously kept in a sealed state. In practical applications, the first split plate 661 and the second split plate 662 may be integrally formed, and are not limited herein.
In one embodiment of the present application, an unlocking button 700 is further disposed on the outer wall of the outer casing 100, and the unlocking button 700 can contact with the first stopper 660 to trigger the unlocking button 700, so that the first stopper 660 is disengaged from the second stopper 670.
Specifically, a clamping groove for accommodating the unlocking button 700 is formed in a side wall of the outer casing 100, so that a user can conveniently control the unlocking button 700.
During the unblock, press the release button 700, make the release button 700 move towards first spacing body 660, move the in-process, release button 700 pushes and supports second components of a whole that can function independently board 662 and make second components of a whole that can function independently board 662 pressed and move to first components of a whole that can function independently board 661 direction to make first spacing piece 663 break away from the block of second spacing body 670, realize the unblock.
As shown in fig. 3 and 5, in an embodiment of the present application, the formaldehyde detecting apparatus further includes a container frame 102 and an elastic support 103, the container frame 102 is disposed in the outer casing 100, the container frame 102 is configured to accommodate the detecting container 300, the elastic support 103 is disposed at a position between the bottom of the detecting container 300 and the bottom of the container frame 102, and the elastic support 103 can apply an upward vertical elastic force to the detecting container 300, so that the top of the detecting container 300 abuts against the inner wall of the top of the container frame 102. The elastic support 103 is preferably a spring. In addition, a light incident port is formed in one side wall of the container frame 102 corresponding to the detection container 300, a light exit port is formed in the other opposite side wall, the light incident port corresponds to the light exit port in position, light emitted by the light source 400 irradiates the detection liquid through the light incident port and then passes through the light exit port to be received by the photoelectric detection module 401, the light source 400 conveniently irradiates the detection liquid, and the photoelectric detection module 401 collects the intensity of the light passing through the detection liquid.
In order to facilitate fixing and taking and placing the detection container 300, in this embodiment, the taking and placing opening 106 is disposed on a side of the outer casing 100 corresponding to the unlocking button 700, the taking and placing opening 106 is right opposite to the detection container 300, the outer casing includes a cover 900 adapted to the taking and placing opening 106, the cover 900 is detachably mounted at the taking and placing opening 106, specifically, the cover 900 may be mounted at the taking and placing opening 106 by means of fastening or screwing, and the like, without limitation. A stopper 910 is provided between the cover 900 and the inspection container 300 to limit the horizontal abutment of the inspection container 300. In specific implementation, the stopper 910 may be disposed on the detection container 300, or may be disposed on the cover 900, so as to achieve the effect of limiting the detection container 300 in the container frame 102 through the stopper 910.
In the use state, the bottom of the detection container 300 is in contact with the elastic support member 103, the top of the detection container 300 is abutted against the top of the container frame 102 under the elastic force of the elastic support member 103, so that the vertical limit of the detection container 300 is realized, and meanwhile, the horizontal limit of the detection container 300 is realized by combining the combined action of the container frame 102, the cover 900 and the stopper 910, so that the detection container 300 is fixed in the container frame 102.
When the inspection container 300 needs to be taken out, the cover 900 is removed to open the access opening 106, and a pressure is applied to the inspection container 300 in a direction toward the elastic support 103, that is, the inspection container 300 moves in a direction away from the top of the container frame 102, so that the elastic support 103 is in a compressed state, and the inspection container 300 is taken out through the access opening 106. In this embodiment, the container frame 102, the elastic supporting member 103, the cover 900 and the stopper 910 cooperate to limit the detection container 300 in the container frame 102 during use, and the cover 900 can open the access opening 106, so that the detection container 300 can be conveniently taken out to replace the detection liquid, and the purpose of reasonably utilizing the space in the outer housing 100 is achieved.
With continued reference to fig. 5, in one embodiment of the present application, the formaldehyde detecting device further includes an elastic restoring member 105, the elastic restoring member 105 is confined between the moving button 640 and the top of the container frame 102, and the elastic restoring member 105 moves the moving button 640 away from the detecting container 300.
The moving button 640 is pressed until the first stopper 660 is engaged with the second stopper 670, so that the position of the moving button 640 is kept in a pressed state, the two sealing bodies 620 are in a sealing state to the air inlet 301 and the air outlet 302, and at the moment, the elastic resetting piece 105 is in a compressed state;
when the unlocking button 700 is pressed, the unlocking button 700 moves towards the first limiting body 660, the first limiting block 663 is separated from the second limiting body 670, the movable button 640 resets under the action of the elastic force of the elastic resetting piece 105, and the transmission rod 650 drives the guide rod 630 and the sealing body 620 to move towards the direction away from the air inlet 301 and the air outlet 302 so as to open the air inlet 301 and the air outlet 302.
The elastic restoring member 105 is preferably a spring.
In order to guide the moving direction of the moving button 640 and avoid the position deviation when the moving button 640 moves, as shown in fig. 5, in an embodiment of the present application, a guide frame 104 is further provided, the guide frame 104 is disposed in the outer casing 100, the guide frame 104 is connected to the top of the container frame 102, in this embodiment, the guide frame 104 is disposed in two parts, which are respectively located at opposite sides of the moving button 640, and the guide frame 104 is in contact with the side wall of the moving button 640, so that the moving button 640 moves in the vertical direction, the triggering accuracy of the moving button 640 is guaranteed, and the situation that the moving button 640 deviates when moving in the direction of the detection container 300 is avoided.
In order to facilitate the installation of the light source 400 and the photoelectric detection module 401, referring to fig. 5, the formaldehyde detection apparatus provided in this embodiment further includes a supporting frame 101, the supporting frame 101 is disposed in the outer casing 100, and the supporting frames 101 are disposed on two opposite sides of the detection container 300, wherein the light source 400 is disposed on the supporting frame 101 on one side of the detection container 300, and the photoelectric detection module 401 is disposed on the supporting frame 101 on the other side (i.e., the opposite direction of the light source 400) of the detection container 300. During operation, the light source 400 can vertically irradiate the detection liquid in the detection container 300 through the light entrance port, the formaldehyde substance in the sampling gas reacts with the detection liquid to change the color of the detection liquid, and the photoelectric detection module 401 can collect the light intensity of the detection liquid irradiated by the light source through the light exit port and convert the light intensity into an electric signal; the processor 402 converts the electrical signal into a digital signal, which is converted into a formaldehyde concentration by a standard curve method.
As shown in fig. 5 and 10, in specific implementation, the supporting frame 101 is a PCB, the PCB is detachably connected to the inner wall of the outer casing 100 through a plurality of ribs 107, the ribs 107 are arranged on the inner walls of the front outer casing and the rear outer casing of the outer casing from top to bottom at intervals, and the PCB is provided with corresponding connecting grooves 108 for being clamped with the ribs 107 to fix the PCB.
In one embodiment, as shown in fig. 10, a baffle 109 is connected between the supporting frames 101, and the baffle 109 is used for limiting the side of the detection container 300 far from the cover 900; the stopper 910 and the cover 900 are coupled to the shutter 109, and the horizontal orientation of the detection container 300 can be sufficiently limited.
In an embodiment of the present application, referring to fig. 1, fig. 3 and fig. 4, the formaldehyde detecting apparatus further includes a controller 403, the controller 403 is installed on the supporting frame 101, and the controller 403 is electrically connected to the sampling apparatus 200, the light source 400 and the photoelectric detection module 401 respectively, for controlling the on/off of the sampling apparatus 200, the light source 400 and the photoelectric detection module 401, and controlling the timing of the sampling apparatus 200. In addition, a corresponding function button 800 is further disposed on the outer casing 100 and electrically connected to the controller 403, for triggering the controller 403 to realize function control of the sampling device 200, the light source 400 and the photodetection module 401.
For the convenience of reading the detection data of the sampling gas by the user, as shown in fig. 1 to fig. 3, the formaldehyde detection device provided in this embodiment further includes a display screen 500, the display screen 500 is disposed on the outer wall of the outer casing 100, the display screen 500 is electrically connected to the processor 402, and the display screen 500 is used to display the formaldehyde concentration data.
The following description adopts the utility model discloses formaldehyde detection device's that the embodiment provides detection principle:
after the user turns on the function button 800, when sampling is not started, the light emitted by the light source 400 vertically irradiates the detection liquid in the detection container 300, and is finally received by the photoelectric detection module 401, and at this time, the photoelectric detection moduleThe intensity of the light collected by block 401 is noted as L0After sampling is started, indoor air is pumped into the detection container 300 by the sampling device 200, the volume v of the sampling gas is calculated according to the flow rate and the sampling time of the sampling device 200, and formaldehyde in the sampling gas reacts with the detection liquid in the detection container 300 to change the color of the detection liquid; after the reaction is finished, the intensity of light ray received by the photoelectric detection module 401 after the light emitted by the light source 400 vertically irradiates the detection liquid is recorded as L1. From the Labober's law, the relationship between the intensity of absorption of a substance at a wavelength of light and the concentration of the light-absorbing substance and the thickness of the liquid layer shows that, when the thickness of the liquid is constant, the change in the intensity of light depends only on the concentration of the substance, i.e., L1-L0The obtained variation is only related to the concentration variation of the detection solution, L1-L0And converting the mass m of the formaldehyde in the sampled gas into the mass m of the formaldehyde in the sampled gas through a standard curve method, wherein the concentration of the formaldehyde in the sampled gas is c = m/v, and thus the concentration of the formaldehyde in the sampled gas is obtained and displayed on a display screen.
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 (14)
1. A formaldehyde detection device is characterized by comprising a sampling device, a detection container, a light source, a photoelectric detection module and a processor;
the sampling device is used for acquiring the sampling gas flowing into the detection container;
the detection container is used for containing detection liquid which reacts with the sampling gas, and the formaldehyde substance in the sampling gas changes the color of the detection liquid;
the light source is used for irradiating the detection liquid;
the photoelectric detection module is used for detecting the light intensity of the light source irradiating the detection liquid;
and the processor is used for acquiring the concentration of the formaldehyde in the sampling gas according to the change of the light intensity of the detection liquid after the color is changed.
2. The formaldehyde detection device according to claim 1, wherein the detection container comprises an air inlet and an air outlet, the air inlet is communicated with an air inlet pipeline, and the air inlet pipeline extends into the detection liquid.
3. The formaldehyde detecting device according to claim 2, wherein the formaldehyde detecting device comprises a sealing device which is provided corresponding to the air inlet and the air outlet and can open or close the air inlet and the air outlet.
4. The formaldehyde detecting device according to claim 3, wherein the sealing means comprises an air guide hood body and a sealing body;
the air guide cover body is provided with a first air guide cavity communicated with the sampling device and the air inlet and a second air guide cavity communicated with the air outlet and the outside;
the first air guide cavity and the second air guide cavity are internally provided with one sealing body respectively, and the sealing bodies can open or close the air inlet and the air outlet.
5. The formaldehyde detecting device according to claim 4, wherein the first air guide cavity and the second air guide cavity are disposed in the same air guide hood body and are separated by a partition plate;
or the first air guide cavity and the second air guide cavity are respectively arranged in one air guide cover body.
6. The formaldehyde detecting device according to claim 4, wherein the sealing device comprises a guide rod, the guide rod penetrates through the air guide hood body and is connected with the sealing body corresponding to the air guide cavity respectively, and the guide rod is driven to drive the sealing body to move in the air guide cavity so as to open or close the air inlet and the air outlet.
7. The formaldehyde detecting device according to claim 4, wherein a plurality of guide ribs are provided at intervals on the peripheral side of the sealing body so as to be slidably fitted to the inner wall of the first air-guide chamber or the second air-guide chamber.
8. The formaldehyde detection device according to any one of claims 3 to 7, wherein the formaldehyde detection device comprises an outer housing, a limiting mechanism is arranged between the outer housing and the sealing device, and the limiting mechanism comprises a first limiting body arranged on a side wall of the sealing device and a second limiting body arranged on an inner wall of the outer housing;
when the sealing device moves towards the detection container, the first limiting body is clamped with the second limiting body, and the sealing device seals the air inlet and the air outlet.
9. The formaldehyde detecting device according to claim 8, wherein an unlocking button is disposed on a side wall of the outer housing, and the unlocking button can contact with the first position-limiting body to disengage the first position-limiting body from the second position-limiting body.
10. The formaldehyde detection device according to claim 8, comprising a container frame and an elastic support, wherein the container frame is disposed in the outer casing to accommodate the detection container, the container frame is provided with a light incident port corresponding to one side wall of the detection container, and a light exit port is disposed at a position corresponding to the light incident port on the other opposite side wall;
the elastic support piece is arranged between the bottom of the detection container and the bottom of the container frame, and the top of the detection container is abutted against the inner wall of the top of the container frame through the elastic support piece.
11. The formaldehyde detecting device according to claim 10, wherein the formaldehyde detecting device comprises an elastic restoring member, the elastic restoring member being confined between the sealing device and the top of the container frame, the elastic restoring member moving the sealing device in a direction away from the detecting container.
12. The formaldehyde detection device according to claim 10, comprising a support frame for carrying the light source and the photoelectric detection module, the support frame being disposed within the outer housing and the support frame being disposed on opposite sides of the container frame.
13. The formaldehyde detecting device according to claim 12, wherein the supporting frame is a PCB board, and the PCB board is detachably connected to the inner wall of the outer housing by a rib.
14. The formaldehyde detecting device according to claim 9, wherein a pick-and-place opening is provided on a side of the outer housing facing the detecting container, the outer housing includes a cover adapted to the pick-and-place opening, and a stopper is provided between the cover and the detecting container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920165095.0U CN209927727U (en) | 2019-01-30 | 2019-01-30 | Formaldehyde detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920165095.0U CN209927727U (en) | 2019-01-30 | 2019-01-30 | Formaldehyde detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209927727U true CN209927727U (en) | 2020-01-10 |
Family
ID=69067786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920165095.0U Withdrawn - After Issue CN209927727U (en) | 2019-01-30 | 2019-01-30 | Formaldehyde detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209927727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668880A (en) * | 2019-01-30 | 2019-04-23 | 汉王科技股份有限公司 | Formaldehyde examination device |
-
2019
- 2019-01-30 CN CN201920165095.0U patent/CN209927727U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668880A (en) * | 2019-01-30 | 2019-04-23 | 汉王科技股份有限公司 | Formaldehyde examination device |
| CN109668880B (en) * | 2019-01-30 | 2023-09-01 | 汉王科技股份有限公司 | Formaldehyde detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5832054A (en) | Fluorescent x-ray analyzer with quickly evacuable cover cases | |
| EP0604528B1 (en) | Ion mobility spectrometry equipment | |
| CN105259246B (en) | Darkroom formula rays safety detection apparatus and method | |
| CN209927727U (en) | Formaldehyde detection device | |
| JP2003294619A (en) | Composite analyzer | |
| CN206725477U (en) | A kind of sample transfer device of half in situ X-ray diffraction XPS Analysis instrument | |
| CN109668880B (en) | Formaldehyde detection device | |
| EP2520922B1 (en) | Sample introducing device of trace detection meter and trace detection meter with sample introducing device | |
| CN113897283A (en) | Microfluidic nucleic acid detection kit and detection device | |
| CN109916700A (en) | A kind of small-sized Solid Phase Extraction and solid phase spectra detect aggregate device | |
| CN111239381A (en) | Micro-fluidic chemiluminescence immunoassay analyzer | |
| JP2007322321A (en) | Photometer | |
| CN203587424U (en) | Hot analysis and pemeable membrane sampling device | |
| GB2106641A (en) | Monitoring radon and thoron daughters | |
| CN204359716U (en) | X-ray fluorescence spectrometry instrument sample cup | |
| US10551304B2 (en) | Explosives detector and method for detecting explosives | |
| CN209745986U (en) | Qualitative/quantitative biochip detection system | |
| CN213482051U (en) | Portable ultraviolet-visible spectrophotometer | |
| CN112198134A (en) | Portable infrared gas analyzer | |
| US20130298641A1 (en) | Sample collection unit, system and method for microbiological air analysis | |
| CN216594785U (en) | Portable air formaldehyde concentration detector | |
| CN220170878U (en) | Portable water quality analyzer | |
| CN210863527U (en) | In-situ reaction device and optical in-situ reaction characterization system | |
| CN217505628U (en) | Multi-light-source high-precision ultraviolet-visible spectrophotometer | |
| CN113009166B (en) | Light-shading detection system and implementation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210414 Address after: 065000 No.1, Hanwang Road, Yanjiao Economic and Technological Development Zone, Sanhe City, Langfang City, Hebei Province Patentee after: HANVON MANUFACTURER Co.,Ltd. Address before: 100193, No. 5, building 8, No. three northeast Wang Xi Road, Beijing, Haidian District Patentee before: HANWANG TECHNOLOGY Co.,Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200110 Effective date of abandoning: 20230901 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200110 Effective date of abandoning: 20230901 |