CN113008876A - Measuring equipment for formaldehyde in ambient air - Google Patents
Measuring equipment for formaldehyde in ambient air Download PDFInfo
- Publication number
- CN113008876A CN113008876A CN202110214141.3A CN202110214141A CN113008876A CN 113008876 A CN113008876 A CN 113008876A CN 202110214141 A CN202110214141 A CN 202110214141A CN 113008876 A CN113008876 A CN 113008876A
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- box body
- fixedly connected
- detection box
- outer protection
- formaldehyde
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000012080 ambient air Substances 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 239000003570 air Substances 0.000 claims abstract description 29
- 230000003139 buffering effect Effects 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims description 23
- 239000003153 chemical reaction reagent Substances 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical group C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a device for measuring formaldehyde in ambient air, and relates to the technical field of measurement of formaldehyde in air. This survey equipment of formaldehyde in ambient air, including outer protection box, the top of outer protection box is provided with the opening, the inside of outer protection box is provided with interior detection box, be provided with the binding nail structure between outer protection box and the interior detection box, the bottom fixedly connected with bottom backing plate of outer protection box, the inside of outer protection box is provided with buffering protection architecture. The inner bottom of the outer protection box body is provided with the buffer structure, the inner detection box body is connected with the outer protection box body in a sliding mode, the fastening nail structure is adopted for fixing, the inner part of the outer protection box body can be collected when the inner detection box body is used, the inner part of the outer protection box body is pulled out when the inner detection box body is used, the use is more convenient, and the buffer structure of the inner bottom can play a better protection effect.
Description
Technical Field
The invention relates to the technical field of measurement of formaldehyde in air, in particular to a device for measuring formaldehyde in ambient air.
Background
Formaldehyde is generally a colorless gas with an irritating odor. It is easily soluble in water and ether, has a concentration of 55% at most, can be mixed with organic solvent such as ethanol and acetone at any ratio, and is insoluble in petroleum ether. The liquid is easy to be turbid when stored for a long time at a cold temperature, and trioxymethylene precipitates at a low temperature. A part of formaldehyde escapes during evaporation, but most of formaldehyde is converted into trioxymethylene, which has great harm to human bodies, but formaldehyde is a good solvent, and is widely applied to chemical products such as paint, so that people need to detect formaldehyde in the decoration or manufacturing plants, and the life safety of personnel is ensured.
The applicant finds that a Chinese patent discloses a device for measuring formaldehyde in ambient air through retrieval when applying the invention, the application number of the device is '201821566099.1', and the device can monitor the content of formaldehyde in indoor air mainly through the reaction condition of a formaldehyde removal catalyst in a measuring box; set up the gas transmission hole on the inside wall of survey case, the gas transmission hole can be arranged formaldehyde gas to survey the incasement from the equidirectional for formaldehyde gas with remove the abundant mixed reaction of formaldehyde catalyst, but inside detection case does not have protective structure, suffers the damage easily in the transportation, reduces its life, and overall structure designs unreasonablely moreover, and is inconvenient to use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device for measuring formaldehyde in ambient air, which solves the problems that the detection box in the existing device for measuring formaldehyde in air is not provided with a protection structure, is easy to damage during transportation, reduces the service life of the device, and is unreasonable in overall structural design and inconvenient to use.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the equipment for measuring the formaldehyde in the ambient air comprises an outer protection box body, wherein an opening is formed in the top of the outer protection box body, an inner detection box body is arranged inside the outer protection box body, a fastening nail structure is arranged between the outer protection box body and the inner detection box body, a bottom base plate is fixedly connected to the bottom of the outer protection box body, and a buffer protection structure is arranged inside the outer protection box body;
interior detection box top is provided with handle structure, the inside of interior detection box is provided with the cylindric casing, the interior bottom of interior detection box just is located the inside fixedly connected with rotation seat structure of cylindric casing, the top fixedly connected with dead lever of rotating the seat structure, the side fixedly connected with catalyst tray of dead lever, the left surface of interior detection box is provided with exhaust structure, exhaust structure and cylindric casing intercommunication, the right flank of interior detection box is provided with air inlet structure, air inlet structure and cylindric casing pass through the second connecting tube intercommunication, the side of second connecting tube is provided with the flowmeter.
Preferably, the side sliding hole has been seted up to the side of outer protection box, the side of interior detection box just is located side sliding hole department and sets up threaded hole, the inside threaded connection of screw hole has the binding nail, the outer end of binding nail passes side sliding hole and fixedly connected with changes and emits, the side of changeing emitting is provided with anti-skidding line.
Preferably, the buffering protection structure includes damping spring, damping spring's top fixedly connected with protection shield, the upper surface of protection shield just is close to the side and has seted up spacing mouthful, the inside wall of outer protection box just is located the spacing fixed block of the inboard fixedly connected with of spacing mouthful.
Preferably, the handle structure includes the spout, the horizontal pole groove of seting up including detecting the box top, the quantity of spout is provided with two, two spout parallel arrangement, and two the spout is located the both ends in horizontal pole groove, two the equal swing joint in inside of spout has two sets of head rods, two the medial surface swing joint of head rod has the second connecting rod, two fixedly connected with connects the horizontal pole between the second connecting rod.
Preferably, two first connecting rods are arranged inside each sliding groove, the first connecting rods are located at two ends of each sliding groove, and arc-shaped notches are formed in the side faces of the transverse rod grooves.
Preferably, the rotating seat structure comprises a fixed disc and a rotating disc, the rotating disc is movably connected to the top of the fixed disc, and a driving motor is arranged between the fixed disc and the rotating disc;
the catalyst tray is provided with a plurality of, a plurality of catalyst tray layer is arranged.
Preferably, the exhaust structure includes exhaust passage and first connecting tube, exhaust passage's inside is provided with the throttle control valve, exhaust passage's inside and be close to outer end fixedly connected with metal protection shell.
Preferably, the inlet structure includes inlet channel, inlet channel's the spacing ring that keeps off of inside wall fixedly connected with, inlet channel's inside and the right side that is located the spacing ring that keeps off are provided with fan assembly, fan assembly's left surface is through connecting block fixedly connected with filter frame, filter frame's inboard fixedly connected with filter screen, inlet channel's inside and be close to outer end fixedly connected with metal protection shell.
Preferably, a control panel is arranged on the front side face of the inner detection box body, and a power supply source is arranged in the inner detection box body.
Preferably, the upper surface of the catalyst tray is provided with a solid formaldehyde catalyst reagent.
The working principle is as follows: when the device is not used, the inner detection box body 2 is completely placed inside the outer protection box body 1, the inner detection box body 2 can be well protected through the buffer structure arranged at the bottom and the side wall of the outer protection box body 1, and the service life of the device is prolonged;
when the device is used, the inner detection box body 2 is pulled out upwards through the handle structure 11, then the position of the inner detection box body 2 is fixed through screwing the fastening nail structure 4 (the exhaust structure 12 and the air inlet structure 19 are ensured to be exposed), detection can be carried out, (the detection principle is that the solid formaldehyde catalyst reagent is contacted with formaldehyde in the air to react, then the content of the formaldehyde in the air is measured through observing the degree of the reaction), the fan assembly 192 works to accelerate the air flow, the flow meter 18 can measure the total air flow of the detection, the air enters the cylindrical shell 13, then is fully contacted with the reagent on the catalyst tray 16, and then is discharged from the exhaust structure 12.
(III) advantageous effects
The invention provides a device for measuring formaldehyde in ambient air. The method has the following beneficial effects:
1. according to the invention, the outer protection box body is arranged, the buffer structure is arranged at the inner bottom of the outer protection box body, the inner detection box body is connected with the outer protection box body in a sliding manner and is fixed by the fastening nail structure, so that the inner detection box body can be retracted into the outer protection box body and pulled out during use, the use is convenient, and the buffer structure at the inner bottom can play a better protection effect.
2. According to the invention, the gas inlet structure and the gas outlet structure are arranged, the flow meter is arranged in the passage of the gas inlet structure, and the throttle control valve structure is arranged in the gas outlet structure, so that the gas can be conveniently controlled to flow into the detection structure and flow out of the detection structure.
3. According to the invention, the connecting cross rod can be conveniently pulled up by arranging the handle structure, so that the internal detection box body can be conveniently pulled out, and the use is very convenient.
4. According to the invention, the cylindrical shell is arranged, and the rotatable catalyst tray structure is arranged in the cylindrical shell, so that the contact between formaldehyde and a detection reagent on the catalyst tray can be increased, and the detection result can be detected more quickly.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the protective case of the present invention;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic view of the internal structure of the inspection box of the present invention;
FIG. 6 is an enlarged view taken at A of FIG. 5 in accordance with the present invention;
fig. 7 is a schematic view of a rotating base structure according to the present invention.
Wherein, 1, an outer protective box body; 2. an inner detection box body; 3. a side slide hole; 4. a fastening nail structure; 5. a bottom bolster plate; 6. a damping spring; 7. a protection plate; 8. a limiting port; 9. a limit fixing block; 10. a control panel; 11. a handle structure; 111. a chute; 112. a first connecting rod; 113. connecting the cross bars; 114. a second connecting rod; 115. a cross bar slot; 12. an exhaust structure; 121. an exhaust passage; 122. a throttle control valve; 123. a first connecting pipe; 13. a cylindrical housing; 14. a rotating seat structure; 15. fixing the rod; 16. a catalyst tray; 17. a second connecting pipe; 18. a flow meter; 19. an air intake structure; 191. an air intake passage; 192. a fan assembly; 193. a filter frame; 194. a limit stop ring; 195. a filter screen; 196. and (4) connecting the blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 7, an embodiment of the present invention provides a device for determining formaldehyde in ambient air, which includes an outer protection box 1, wherein an opening is formed in a top of the outer protection box 1, an inner detection box 2 is placed in and out of the opening in the top, an inner detection box 2 is disposed inside the outer protection box 1, a fastening nail structure 4 is disposed between the outer protection box 1 and the inner detection box 2, a bottom pad 5 is fixedly connected to a bottom of the outer protection box 1, so that the outer protection box 1 can be conveniently placed, and a buffer protection structure is disposed inside the outer protection box 1, so that the inner detection box 2 can be well protected;
the top of the inner detection box body 2 is provided with a handle structure 11, a user can pull the device upwards through the handle structure 11, the inner part of the inner detection box body 2 is provided with a cylindrical shell 13, the inner bottom of the inner detection box body 2 is fixedly connected with a rotating seat structure 14 positioned in the cylindrical shell 13, the top of the rotating seat structure 14 is fixedly connected with a fixed rod 15, the rotating seat structure 14 can drive the fixed rod 15 to rotate, the side surface of the fixed rod 15 is fixedly connected with a catalyst tray 16 for placing detection reagents, the left side surface of the inner detection box body 2 is provided with an exhaust structure 12, the exhaust structure 12 is communicated with the cylindrical shell 13 and used for exhausting air, the right side surface of the inner detection box body 2 is provided with an air inlet structure 19, the air inlet structure 19 is communicated with the cylindrical shell 13 through a second connecting pipeline 17 and used for entering air, and the side surface of the, for detecting the air flow therethrough.
The side surface of the outer protection box body 1 is provided with a side surface sliding hole 3, the side surface of the inner detection box body 2 and the position of the side surface sliding hole 3 are provided with threaded holes, the inner threads of the threaded holes are connected with fastening nails, the outer ends of the fastening nails penetrate through the side surface sliding hole 3 and are fixedly connected with rotary bells, the side surface of the rotary bells are provided with anti-skidding lines, a user can conveniently rotate the fastening nails by hands directly, the buffering protection structure comprises a damping spring 6, the top end of the damping spring 6 is fixedly connected with a protection plate 7, the upper surface of the protection plate 7 and close to the side edge are provided with a limit opening 8, the inner side wall of the outer protection box body 1 and the inner side of the limit opening 8 are fixedly connected with a limit fixing block 9, the limit fixing block 9 limits the upper ejection height of the protection plate 7, the handle structure, the two sliding grooves 111 are arranged in parallel, the two sliding grooves 111 are located at two ends of a transverse rod groove 115, two groups of first connecting rods 112 are movably connected inside the two sliding grooves 111, the inner side surfaces of the two first connecting rods 112 are movably connected with second connecting rods 114, a connecting transverse rod 113 is fixedly connected between the two second connecting rods 114, two first connecting rods 112 are arranged inside each sliding groove 111, the first connecting rods 112 are located at two ends of the sliding groove 111, an arc-shaped notch is formed in the side surface of the transverse rod groove 115, the connecting transverse rod 113 can be clamped inside the transverse rod groove 115, the transverse rod 113 can be conveniently pulled out and connected through the arc-shaped notch, the rotating seat structure 14 comprises a fixed disc and a rotating disc, the rotating disc is movably connected to the top of the fixed disc, a driving motor is arranged between the fixed disc and the rotating disc, the driving motor;
the catalyst trays 16 are arranged in a plurality of layers, the catalyst trays 16 are arranged in layers and can evenly contain reagents, the exhaust structure 12 comprises an exhaust channel 121 and a first connecting channel 123, a throttle control valve 122 is arranged in the exhaust channel 121, the throttle control valve 122 is used for limiting the flow rate of gas, a metal protective shell is fixedly connected in the exhaust channel 121 and close to the outer end, the air inlet structure 19 comprises an air inlet channel 191, a limit baffle ring 194 is fixedly connected to the inner side wall of the air inlet channel 191, a fan assembly 192 is arranged in the air inlet channel 191 and located on the right side of the limit baffle ring 194 and can accelerate air flow, a filter frame 193 is fixedly connected to the left side face of the fan assembly 192 through a connecting block 196, impurities in the air are filtered, a filter screen 195 is fixedly connected to the inner side of the filter frame 193, and a metal protective shell is fixedly connected in the air inlet channel 191 and, the front side of the internal detection box body 2 is provided with a control panel 10, the internal detection box body 2 is internally provided with a power supply source, and the upper surface of the catalyst tray 16 is provided with a solid formaldehyde catalyst reagent.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a survey equipment of formaldehyde in ambient air, includes outer protection box (1), the top of outer protection box (1) is provided with opening, its characterized in that: an inner detection box body (2) is arranged inside the outer protection box body (1), a fastening nail structure (4) is arranged between the outer protection box body (1) and the inner detection box body (2), a bottom base plate (5) is fixedly connected to the bottom of the outer protection box body (1), and a buffer protection structure is arranged inside the outer protection box body (1);
a handle structure (11) is arranged at the top of the inner detection box body (2), a cylindrical shell (13) is arranged inside the inner detection box body (2), a rotating seat structure (14) is fixedly connected at the inner bottom of the inner detection box body (2) and positioned in the cylindrical shell (13), the top of the rotating seat structure (14) is fixedly connected with a fixed rod (15), the side surface of the fixed rod (15) is fixedly connected with a catalyst tray (16), the left side surface of the inner detection box body (2) is provided with an exhaust structure (12), the exhaust structure (12) is communicated with the cylindrical shell (13), the right side surface of the inner detection box body (2) is provided with an air inlet structure (19), the air inlet structure (19) is communicated with the cylindrical shell (13) through a second connecting pipeline (17), and a flowmeter (18) is arranged on the side surface of the second connecting pipeline (17).
2. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: side slide opening (3) have been seted up to the side of outer protection box (1), the side of interior detection box (2) just is located side slide opening (3) and locates to set up threaded hole, the internal thread of screw hole is connected with the binding nail, the outer end of binding nail passes side slide opening (3) and fixedly connected with changes and emits, the side of changeing emitting is provided with anti-skidding line.
3. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: buffering protection structure includes damping spring (6), the top fixedly connected with protection shield (7) of damping spring (6), spacing mouthful (8) have been seted up just near the side to the upper surface of protection shield (7), the inside wall of outer protection box (1) just is located spacing fixed block (9) of inboard fixedly connected with of spacing mouthful (8).
4. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: handle structure (11) are including spout (111), horizontal pole groove (115) that detection box (2) top was seted up including, the quantity of spout (111) is provided with two, two spout (111) parallel arrangement, and two spout (111) are located the both ends in horizontal pole groove (115), two the equal swing joint in inside of spout (111) has two sets of head rod (112), two the medial surface swing joint of head rod (112) has second connecting rod (114), two fixedly connected with between second connecting rod (114) connects horizontal pole (113).
5. The apparatus for measuring formaldehyde in ambient air according to claim 4, wherein: two first connecting rods (112) are arranged in each sliding groove (111), the first connecting rods (112) are located at two ends of each sliding groove (111), and arc-shaped notches are formed in the side faces of the transverse rod grooves (115).
6. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: the rotating seat structure (14) comprises a fixed disc and a rotating disc, the rotating disc is movably connected to the top of the fixed disc, and a driving motor is arranged between the fixed disc and the rotating disc;
the catalyst tray (16) is provided with a plurality of catalyst trays (16), and the catalyst trays (16) are arranged in layers.
7. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: exhaust structure (12) include exhaust passage (121) and first connecting tube (123), the inside of exhaust passage (121) is provided with throttle control valve (122), the inside of exhaust passage (121) just is close to outer end fixedly connected with metal protection shell.
8. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: air inlet structure (19) are including inlet channel (191), the inside wall fixedly connected with of inlet channel (191) keeps off ring (194), the inside of inlet channel (191) and the right side that is located spacing fender ring (194) are provided with fan assembly (192), connecting block (196) fixedly connected with filter frame (193) are passed through to the left surface of fan assembly (192), the inboard fixedly connected with filter screen (195) of filter frame (193), the inside of inlet channel (191) just is close to outer end fixedly connected with metal protection shell.
9. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: the front side of the inner detection box body (2) is provided with a control panel (10), and a power supply source is arranged inside the inner detection box body (2).
10. The apparatus for measuring formaldehyde in ambient air according to claim 1, wherein: the upper surface of the catalyst tray (16) is provided with a solid formaldehyde catalyst reagent.
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CN202110214141.3A CN113008876B (en) | 2021-02-26 | 2021-02-26 | Determination equipment for formaldehyde in ambient air |
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CN202110214141.3A CN113008876B (en) | 2021-02-26 | 2021-02-26 | Determination equipment for formaldehyde in ambient air |
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