Formaldehyde concentration detection device and detection method

Abstract

The present invention relates to a formaldehyde concentration detection device and a detection method thereof. The tank body is a tank-shaped structure that opens upward, and the tank cover is detachably connected to the upper opening of the tank body; the linkage assembly includes a lifting rod that passes through the bottom of the tank body from bottom to top, and a push rod that is movably connected to a support seat in the accommodating cavity, and a push plate on the end of the push rod corresponds to a push hole on the tank body; the detection assembly includes a detection paper that is placed in the accommodating cavity from top to bottom, with the detection surface of the detection paper facing the push hole. The push rod moves toward the push hole under the drive of the lifting rod and pushes the detection paper into the push hole through the push plate. The present invention collects samples in four directions by placing the tank body in the room. The detection paper that completes the detection is displayed in a step-by-step column form. After the detection, the formaldehyde concentrations at different locations in the room can be known. Auxiliary circulation equipment is then placed at the location with the highest concentration to enhance air flow and accelerate the elimination of formaldehyde.

Description

Technical Field

[0001] The present invention belongs to the technical field of formaldehyde concentration data collection, and in particular relates to a formaldehyde concentration detection device and a detection method thereof. Background Art

[0002] Formaldehyde is a colorless gas with a strong pungent odor that is easily soluble in water, aqueous solutions, and ethanol. It is a gas at room temperature, typically existing as a 35% to 40% formaldehyde aqueous solution known as formalin. Formaldehyde has a wide range of industrial applications, including plastics, synthetic fibers, leather, medicine, and dyes. However, formaldehyde poses numerous health risks, including irritation, sensitization, and mutagenicity. It can cause respiratory and skin diseases, and even affect reproductive health.

[0003] Measuring formaldehyde concentrations in homes is a crucial measure for safeguarding the health and safety of residents. With advancements in science and technology and the continuous development of testing techniques, we can now choose more accurate and convenient detection technologies to monitor indoor formaldehyde concentrations. At the same time, we should also pay attention to formaldehyde emissions from finishing materials and furniture to reduce formaldehyde pollution at the source. The best way to remove formaldehyde is to ventilate the house, but simply opening windows for ventilation does not accelerate formaldehyde elimination. Auxiliary ventilation devices are needed to redirect air flow within the house. Therefore, it is essential to design auxiliary ventilation systems to target areas with the highest formaldehyde concentrations. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a formaldehyde concentration detection device and a detection method thereof. By placing the tank in the room to be detected, formaldehyde is collected from four directions, and detection can be carried out in different positions in different rooms in turn. The collected samples are displayed in a step-by-step manner on the detection paper after the completion of the detection. After the detection, the formaldehyde concentrations at different positions in the room can be known, and auxiliary circulation equipment is then placed at the position with the highest concentration to enhance air flow and accelerate the elimination of formaldehyde.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A formaldehyde concentration detection device includes a tank body, a tank cover, a linkage assembly and a detection assembly, the tank body is a tank-shaped structure that opens upward, a accommodating chamber is provided in the tank body, and the tank cover is detachably connected to the upper opening of the tank body; the linkage assembly includes a lifting rod and a pushing rod, the lifting rod passes through the bottom of the tank body from bottom to top, the pushing rod is movably connected to a support seat in the accommodating chamber, and the pushing plate on the end of the pushing rod corresponds to the pushing hole on the tank body; the detection assembly includes detection paper, the detection paper is placed in the accommodating chamber from top to bottom, the detection surface of the detection paper faces the pushing hole, and the pushing rod moves toward the pushing hole under the drive of the lifting rod and pushes the detection paper into the pushing hole through the pushing plate.

[0007] Furthermore, the support seat is composed of a support plate and a disassembly plate, the support plate is in an L-shaped structure, the support plate and the end of the disassembly plate are detachably connected and have a U-shaped structure, the other end of the support plate is fixedly connected to the inner wall of the accommodating cavity, and the other end of the disassembly plate is detachably connected to the inner wall of the accommodating cavity, a sliding groove is provided on the support plate, and the push rod is fitted and connected in the sliding groove.

[0008] Furthermore, the linkage assembly also includes a driving gear, the two ends of which are rotatably connected to the support plate and the disassembly plate respectively, the lifting rod is provided with a first rack, and the pushing rod is provided with a second rack, the driving gear is respectively engaged with the first rack and the second rack, the pushing rod is located between the driving gear and the sliding groove, and the lifting rod and the pushing rod are in an orthogonal state perpendicular to each other.

[0009] Furthermore, the detection assembly further includes a reel, a collection wheel, a rotating gear, a first ratchet ring, a first pawl, a second ratchet ring and a second pawl, the reel being rotatably connected to a rotating seat at the bottom of the accommodating chamber, the disassembly plate being connected to the first ratchet ring, a first rotating column at one end of the collection wheel being connected to the first pawl, the end of the first rotating column being rotatably connected to the disassembly plate, the first pawl being engaged with a first gear ring in the first ratchet ring, and the first pawl being separated from the first gear ring in a clockwise direction from the disassembly plate toward the collection wheel, and being engaged with the first gear ring in a counterclockwise direction;

[0010] A second pawl is connected to the second rotating column at the other end of the collection wheel, the rotating gear is sleeved on the second rotating column, the end of the second rotating column is rotatably connected to the support plate, the second ratchet ring is connected to the surface of the rotating gear facing the second pawl, the second pawl is engaged with the second gear ring in the second ratchet ring, and when the rotating gear moves toward the collection wheel, the second pawl and the second gear ring are separated in the clockwise direction, and are engaged with the second gear ring in the counterclockwise direction;

[0011] The rotating gear is engaged with a third rack on the lifting rod, the first rack and the second rack are arranged opposite to each other on the lifting rod, and the lifting rod is located between the driving gear and the rotating gear;

[0012] The lower end of the detection paper is wound on the winding wheel, and the upper end of the detection paper is wound on the collecting wheel.

[0013] Furthermore, a first clamping column is provided on the outer wall of the roller, a second clamping column is provided on the outer wall of the collecting wheel, a first clamping ring is provided at the lower end of the long edge of the detection paper, and a second clamping ring is provided at the upper end of the long edge of the detection paper, the first clamping ring cooperates with the first clamping column, and the second clamping ring cooperates with the second clamping column.

[0014] Furthermore, an assembly hole penetrating the accommodating cavity is provided at the bottom of the tank body, and the rotating seat includes two groups, and the two groups of rotating seats are respectively arranged on the two end edges corresponding to the assembly holes. Both groups of rotating seats are provided with rotating holes, and the two ends of the reel can be rotatably connected in the rotating holes respectively, and a baffle is detachably connected to the assembly hole.

[0015] Furthermore, the assembly hole is provided with an assembly groove penetrating the rotating hole, the back of the baffle is provided with an assembly column cooperating with the assembly groove, the reel is embedded in the assembly groove from bottom to top, and the assembly column abuts the reel.

[0016] Furthermore, it also includes an air guide component, which includes an air guide seat, a fan, a power supply and a touch switch. The air guide seat is an inverted U-shaped structure, and the air guide seat is inverted and connected to the two ends of the push hole. The air guide cavity in the air guide seat is a vertical through structure. The fan is arranged on the edge of the tank cover, and the fan is horizontally placed at the upper end opening of the air guide seat. The power supply is arranged at the upper end of the tank cover, and the touch switch is arranged at the lower end of the tank cover. The touch switch faces the lifting rod, and the fan is electrically connected to the power supply.

[0017] Furthermore, the linkage components, detection components and air guide components include four groups, and the four groups of linkage components, detection components and air guide components are distributed circumferentially on the outer wall of the tank body.

[0018] The present invention also provides a detection method of a formaldehyde concentration detection device, comprising the following steps:

[0019] S1: Insert the first clamping ring on the test paper into the first clamping column of the reel, wind the test paper layer by layer on the reel to form a roll for use, invert the tank body and open the baffle at the bottom of the tank body, insert the reel into the rotating hole from the assembly groove, rotate the reel to extend the test paper with the second clamping ring downward to the position of the collection wheel under the action of gravity, insert the second clamping ring into the second clamping column on the collection wheel to complete the fixation of the test paper, re-assemble the baffle on the assembly hole so that the assembly column abuts against the reel to prevent the reel from falling, and then invert the tank body again, close the tank cover and fix it at the upper end opening of the tank body;

[0020] S2: The tank body is lifted and brought into the room to be inspected. After the four groups of linkage components, detection components and air guide components distributed circumferentially on the tank body are aligned in the direction of the required positioning, the tank body is placed on the ground. Under the action of gravity, the tank body sinks, causing the lifting rod to move upward in the tank body. During the movement, the first rack on the lifting rod pushes the driving gear upward. The rotating driving gear pushes the second rack on the pushing rod, causing the pushing plate on the pushing rod to move toward the pushing hole, pushing the detection surface on the detection paper into the pushing hole and exposing it to the air. The third rack on the lifting rod pushes the rotating gear meshed with it upward. At this time, the collecting wheel remains stationary under the engagement of the first ratchet ring and the first pawl, and the rotating gear rotates under the separation of the second ratchet ring and the second pawl;

[0021] S3: The lifting rod continues to rise and contacts the touch switch, starting the fan to rotate. The rotating fan draws the air in the air guide cavity upward, so that the air in the direction facing the air guide seat enters the air guide cavity from below and blows over the test paper exposed to the push hole, and the formaldehyde concentration data in four directions are collected simultaneously;

[0022] S4: After completing data collection, the tank is lifted, and the lifting rod moves downward under the action of gravity, first disconnecting the contact with the touch switch, causing the fan to stop rotating and stopping the formaldehyde concentration data collection at that location;

[0023] S5: The first rack on the lifting rod pushes the driving gear downward, and the rotating driving gear pushes the second rack on the pushing rod back, so that the pushing plate on the pushing rod gradually moves away from the pushing hole, and the detection paper is suspended in the accommodating cavity again. The third rack on the lifting rod pushes the rotating gear meshed with it downward. At this time, the collecting wheel can rotate under the separation of the first ratchet ring and the first pawl. The rotating gear is driven by the third rack to rotate under the engagement of the second ratchet ring and the second pawl, and the collecting wheel is driven to rotate at the same time. Therefore, the detection paper will move upward during the rotation of the collecting wheel, and the detection paper whose lower end has not yet collected data will be stopped between the pushing hole and the pushing plate;

[0024] S6: Place the tank at different locations in the room to be tested to collect formaldehyde concentration data, and collect the collected samples in a step-by-step manner on the test paper.

[0025] Compared with the prior art, the advantages of the present invention are that by placing the tank body at different positions in the room to be tested, formaldehyde concentration data can be collected from four directions. The concentration levels in different areas are different, and the collected information presented on the test paper will also be different. When the tank body is lowered, the test paper is pushed out and exposed to the air for data collection through the linkage component inside it. When the tank body is lifted, the test paper is pushed out and moved up, so that only a small section of the test paper is used for each test collection. The samples collected during the test at different positions are displayed in a step-by-step manner on the test paper, which is convenient for subsequent one-time concentration testing, and can also be kept for sorting and archiving. After the test, the formaldehyde concentrations at different positions in the room can be known, and auxiliary circulation equipment can be placed at the position with the highest concentration to enhance air flow and accelerate the elimination of formaldehyde. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A perspective view of the present invention;

[0028] Figure 2 It is a top exploded schematic diagram of the present invention;

[0029] Figure 3 For the present invention Figure 2 A partial enlarged view of point A

[0030] Figure 4 This is a bottom-up explosion diagram of the present invention;

[0031] Figure 5 A top view of the present invention;

[0032] Figure 6 For the present invention Figure 5 BB view;

[0033] Figure 7 It is a detection state schematic diagram of the present invention;

[0034] Figure 8 A half-section schematic diagram of the tank body of the present invention;

[0035] Figure 9A three-dimensional image of the detection paper of the present invention;

[0036] Figure 10 A three-dimensional diagram of the detection assembly and the jacking rod of the present invention;

[0037] Figure 11 It is a schematic diagram of the explosion of the detection assembly and the lifting rod of the present invention.

[0038] Wherein: 1. Tank body; 11. Accommodating cavity; 12. Support seat; 121. Support plate; 122. Disassembly plate; 123. Sliding groove; 13. Push hole; 14. Rotating seat; 141. Rotating hole; 15. Assembly hole; 151. Assembly groove; 16. Baffle; 161. Assembly column; 2. Tank cover; 3. Linkage assembly; 31. Lifting rod; 311. First rack; 312. Third rack; 32. Push rod; 321. Push plate; 322. Second rack; 33. Drive gear; 4. Detection assembly; 41. Detection paper ;411. Detection surface;412. First retaining ring;413. Second retaining ring;42. Reel;421. First clamping column;43. Collecting wheel;431. First rotating column;432. Second rotating column;433. Second clamping column;44. Rotating gear;45. First ratchet ring;451. First gear ring;46. First pawl;47. Second ratchet ring;471. Second gear ring;48. Second pawl;5. Air guide assembly;51. Air guide seat;511. Air guide cavity;52. Fan;53. Power supply;54. Touch switch. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0040] The specific embodiments of the present invention will be described below with reference to the accompanying drawings:

[0041] like Figure 1-11As shown, a formaldehyde concentration detection device includes a tank body 1, a tank cover 2, a linkage assembly 3 and a detection assembly 4, the tank body 1 is a tank-shaped structure with an upward opening, a accommodating chamber 11 is provided in the tank body 1, and the tank cover 2 is detachably connected to the upper end opening of the tank body 1; the linkage assembly 3 includes a lifting rod 31 and a pushing rod 32, the lifting rod 31 passes through the bottom of the tank body 1 from bottom to top, the pushing rod 32 is movably connected to the support seat 12 in the accommodating chamber 11, and the pushing plate 321 on the end of the pushing rod 32 corresponds to the pushing hole 13 on the tank body 1; the detection assembly 4 includes a detection paper 41, the detection paper 41 is placed in the accommodating chamber 11 from top to bottom, the detection surface 411 of the detection paper 41 faces the pushing hole 13, and the pushing rod 32 moves toward the pushing hole 13 under the drive of the lifting rod 31 and pushes the detection paper 41 into the pushing hole 13 through the pushing plate 321.

[0042] Furthermore, the support seat 12 is composed of a support plate 121 and a disassembly plate 122. The support plate 121 has an L-shaped structure. The ends of the support plate 121 and the disassembly plate 122 are detachably connected and have a U-shaped structure. The other end of the support plate 121 is fixedly connected to the inner wall of the accommodating cavity 11, and the other end of the disassembly plate 122 is detachably connected to the inner wall of the accommodating cavity 11. A sliding groove 123 is provided on the support plate 121, and the push rod 32 is cooperatively connected to the sliding groove 123.

[0043] Furthermore, the linkage assembly 3 also includes a driving gear 33, the two ends of which are rotatably connected to the support plate 121 and the disassembly plate 122 respectively, the lifting rod 31 is provided with a first rack 311, and the pushing rod 32 is provided with a second rack 322, the driving gear 33 is respectively engaged with the first rack 311 and the second rack 322, the pushing rod 32 is located between the driving gear 33 and the sliding groove 123, and the lifting rod 31 and the pushing rod 32 are in an orthogonal state perpendicular to each other.

[0044] Furthermore, the detection assembly 4 also includes a reel 42, a collection wheel 43, a rotating gear 44, a first ratchet ring 45, a first pawl 46, a second ratchet ring 47 and a second pawl 48. The reel 42 is rotatably connected to the rotating seat 14 at the bottom of the accommodating chamber 11. The disassembly plate 122 is connected to the first ratchet ring 45. The first rotating column 431 at one end of the collection wheel 43 is connected to the first pawl 46. The end of the first rotating column 431 is rotatably connected to the disassembly plate 122. The first pawl 46 is engaged with the first gear ring 451 in the first ratchet ring 45. In the direction from the disassembly plate 122 to the collection wheel 43, the first pawl 46 and the first gear ring 451 are separated in the clockwise direction and engaged in the counterclockwise direction.

[0045] A second pawl 48 is connected to a second rotating post 432 at the other end of the collection wheel 43. The rotating gear 44 is sleeved on the second rotating post 432. The distal end of the second rotating post 432 is rotatably connected to the support plate 121. A second ratchet ring 47 is connected to the surface of the rotating gear 44 facing the second pawl 48. The second pawl 48 engages with a second gear ring 471 within the second ratchet ring 47. When the rotating gear 44 moves toward the collection wheel 43, the second pawl 48 and the second gear ring 471 are separated in the clockwise direction and engaged in the counterclockwise direction.

[0046] The rotating gear 44 is engaged with the third rack 312 on the lifting rod 31. The first rack 311 and the second rack 322 are arranged opposite to each other on the lifting rod 31. The lifting rod 31 is located between the driving gear 33 and the rotating gear 44.

[0047] The lower end of the detection paper 41 is wound on the winding wheel 42 , and the upper end of the detection paper 41 is wound on the collecting wheel 43 .

[0048] Furthermore, a first clamping column 421 is provided on the outer wall of the roller 42, a second clamping column 433 is provided on the outer wall of the collecting wheel 43, a first clamping ring 412 is provided at the lower end of the long side edge of the detection paper 41, and a second clamping ring 413 is provided at the upper end of the long side edge of the detection paper 41. The first clamping ring 412 cooperates with the first clamping column 421, and the second clamping ring 413 cooperates with the second clamping column 433.

[0049] Furthermore, the bottom of the tank body 1 is provided with an assembly hole 15 that passes through the accommodating cavity 11, and the rotating seat 14 includes two groups. The two groups of rotating seats 14 are respectively arranged on the two end edges corresponding to the assembly hole 15. The two groups of rotating seats 14 are both provided with a rotating hole 141, and the two ends of the reel 42 are respectively rotatably connected in the rotating hole 141. The baffle 16 is detachably connected to the assembly hole 15.

[0050] Furthermore, the assembly hole 15 is provided with an assembly groove 151 that passes through the rotating hole 141, and the back of the baffle 16 is provided with an assembly column 161 that cooperates with the assembly groove 151. The reel 42 is embedded in the assembly groove 151 from bottom to top, and the assembly column 161 abuts against the reel 42.

[0051] Furthermore, it also includes an air guide component 5, which includes an air guide seat 51, a fan 52, a power supply 53 and a touch switch 54. The air guide seat 51 is an inverted U-shaped structure, and the air guide seat 51 is inverted and connected to the two ends of the pushing hole 13. The air guide cavity 511 in the air guide seat 51 is a structure that passes through from top to bottom. The fan 52 is arranged on the edge of the tank cover 2, and the fan 52 is horizontally placed at the upper end opening of the air guide seat 51. The power supply 53 is arranged at the upper end of the tank cover 2, and the touch switch 54 is arranged at the lower end of the tank cover 2. The touch switch 54 faces the lifting rod 31, and the fan 52 is electrically connected to the power supply 53.

[0052] Furthermore, the linkage assembly 3 , the detection assembly 4 and the air guide assembly 5 include four groups, and the four groups of the linkage assembly 3 , the detection assembly 4 and the air guide assembly 5 are distributed circumferentially on the outer wall of the tank body 1 .

[0053] Description of the working method of the present invention:

[0054] In the formaldehyde concentration detection device adopting this structure, the support seat 12 in the accommodating chamber 11 holds the push rod 32 between the sliding groove 123 and the driving gear 33. Therefore, when the driving gear 33 rotates, the push rod 32 can only move forward or backward along the direction of the sliding groove 123. The lifting rod 31 is located between the driving gear 33 and the rotating gear 44. During the up and down movement of the lifting rod 31, the driving gear 33 and the rotating gear 44 can be simultaneously linked by the first rack 311 and the third rack 312. The lifting rod 31 and the push rod 32 are in an orthogonal state perpendicular to each other. The function is to convert the longitudinal movement into the lateral movement. Therefore, the detection paper 41 can be pushed into the pushing hole 13 by the pushing plate 321 during the rising process of the lifting rod 31, and the pushing plate 321 can withdraw from the pushing hole 13 and release the detection paper 41 during the descending process of the lifting rod 31.

[0055] Then, in order to realize that the collected samples are displayed in a step-by-step manner on the detection paper 41, it is necessary to be able to pull the detection paper 41 upward when the lifting rod 31 descends, so that the new detection surface 411 of the detection paper 41 stays between the pushing plate 321 and the pushing hole 13, and the detection paper 41 is kept in place when the lifting rod 31 rises. Therefore, a first pawl 46 and a second pawl 48 are respectively provided on the first rotating column 431 and the second rotating column 432 at the left and right ends of the collecting wheel 43, the first ratchet ring 45 is provided on the disassembly plate 122, the second ratchet ring 47 is provided on the side of the rotating gear 44 facing the collecting wheel 43, and the rotating gear 44 is sleeved on the second rotating column 432, along the disassembly plate 1 22 toward the collecting wheel 43, the first pawl 46 and the first gear ring 451 are separated in the clockwise direction, and are engaged with the first gear ring 451 in the counterclockwise direction; along the direction of the rotating gear 44 toward the collecting wheel 43, the second pawl 48 and the second gear ring 471 are separated in the clockwise direction, and are engaged with the second gear ring 471 in the counterclockwise direction; therefore, when the lifting rod 31 moves upward, the rotating gear 44 rotates, while the collecting wheel 43 remains stationary. When the lifting rod 31 descends, it pushes the rotating gear 44 to rotate, and drives the collecting wheel 43 to rotate together, so that the detection paper 41 is driven upward during its rotation.

[0056] A flat plate can be installed at the bottom of the lifting rod 31 to increase the contact area with the ground and maintain stability. The connection method between the support plate 121 and the disassembly plate 122 can ensure the convenience of assembly, and parts can be replaced in time when they are damaged.

[0057] The present invention utilizes the detection method and steps of the formaldehyde concentration detection device:

[0058] S1: Insert the first clamping ring 412 on the test paper 41 into the first clamping column 421 of the reel 42, and wind the test paper 41 layer by layer on the reel 42 to form a roll for use. Invert the tank body 1 and open the baffle 16 at the bottom of the tank body 1. Insert the reel 42 into the rotating hole 141 from the assembly groove 151. Rotate the reel 42 to extend the test paper 41 with the second clamping ring 413 downward to the position of the collecting wheel 43 under the action of gravity. Insert the second clamping ring 413 into the second clamping column 433 on the collecting wheel 43 to complete the fixation of the test paper 41. Re-assemble the baffle 16 on the assembly hole 15 so that the assembly column 161 abuts against the reel 42 to prevent the reel 42 from falling. After inverting the tank body 1 again, close the tank cover 2 and fix it at the upper end opening of the tank body 1.

[0059] S2: The tank body 1 is lifted and brought into the room to be inspected. After the four groups of linkage components 3, detection components 4 and air guide components 5 distributed circumferentially on the tank body 1 are aligned in the direction of the required positioning, the tank body 1 is placed on the ground. Under the action of gravity, the tank body 1 sinks, causing the lifting rod 31 to move upward in the tank body 1. During the movement, the first rack 311 on the lifting rod 31 pushes the driving gear 33 upward. The rotating driving gear 33 pushes the second rack 322 on the pushing rod 32, causing the pushing plate 321 on the pushing rod 32 to move toward the pushing hole 13, pushing the detection surface 411 on the detection paper 41 into the pushing hole 13 and exposing it to the air. The third rack 312 on the lifting rod 31 pushes the rotating gear 44 engaged with it upward. At this time, the collecting wheel 43 remains stationary under the engagement of the first ratchet ring 45 and the first pawl 46, and the rotating gear 44 rotates under the separation of the second ratchet ring 47 and the second pawl 48;

[0060] S3: The lifting rod 31 continues to rise and contacts the touch switch 54, starting the fan 52 to rotate. The rotating fan 52 draws the air in the air guide cavity 511 upward, so that the air in the direction facing the air guide seat 51 enters the air guide cavity 511 from below and blows over the detection paper 41 exposed to the push hole 13, thereby simultaneously collecting formaldehyde concentration data in four directions.

[0061] S4: After completing data collection, the tank body 1 is lifted, and the lifting rod 31 moves downward under the action of gravity, first disconnecting the contact with the touch switch 54, so that the fan 52 stops rotating, and the formaldehyde concentration data collection at this location is stopped;

[0062] S5: The first rack 311 on the lifting rod 31 pushes the driving gear 33 downward, and the rotating driving gear 33 pushes the second rack 322 on the pushing rod 32 back, so that the pushing plate 321 on the pushing rod 32 gradually moves away from the pushing hole 13, and the detection paper 41 is suspended in the accommodating chamber 11 again. The third rack 312 on the lifting rod 31 pushes the rotating gear 44 engaged with it downward. At this time, the collecting wheel 43 can rotate under the separation of the first ratchet ring 45 and the first pawl 46. The rotating gear 44 is driven to rotate by the third rack 312 under the engagement of the second ratchet ring 47 and the second pawl 48, and at the same time drives the collecting wheel 43 to rotate. Therefore, the detection paper 41 will move upward during the rotation of the collecting wheel 43, and the detection paper 41 whose lower end has not yet collected data will stay between the pushing hole 13 and the pushing plate 321;

[0063] S6: The tank 1 is placed at different locations in the room to be tested to collect formaldehyde concentration data, and the collected samples are collected in a step-by-step manner on the test paper 41.

[0064] The beneficial effect of the present invention is that by placing the tank body 1 at different positions in the room to be tested, formaldehyde concentration data can be collected from four directions. The concentration levels in different areas are different, and the collection information presented on the test paper 41 will also be different. When the tank body 1 is lowered, the test paper 41 is pushed out and exposed to the air for data collection through the linkage component 3 inside it. When the tank body 1 is lifted, the test paper 41 is pushed out and moved up, so that only a small section on the test paper 41 is used for each test collection. The samples collected during the test at different positions are displayed in a step-by-step manner on the test paper 41, which is convenient for subsequent one-time concentration testing and can also be kept for sorting and archiving. After the test, the formaldehyde concentrations at different positions in the room can be known, and auxiliary circulation equipment can be placed at the position with the highest concentration to enhance air flow and accelerate the elimination of formaldehyde.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A formaldehyde concentration detection device, characterized in that: The top end of the lifting rod is connected to the bottom end of the lifting rod, and the other end of the lifting rod is detachably connected to the support seat in the accommodating cavity. The pushing plate on the end of the pushing rod corresponds to the pushing hole on the tank body; the detection assembly includes detection paper, which is placed in the accommodating cavity from top to bottom, and the detection surface of the detection paper faces the pushing hole. The pushing rod is driven by the lifting rod to move toward the pushing hole and push the detection paper into the pushing hole through the pushing plate. The support seat is composed of a support plate and a disassembly plate, and the support plate is L-shaped. The end of the support plate is detachably connected to the end of the disassembly plate and is U-shaped. The other end of the support plate is fixedly connected to the inner side wall of the accommodating cavity, and the other end of the disassembly plate is detachably connected to the inner side wall of the accommodating cavity. The support plate is provided with a sliding groove. The driving member is a chain which has a first end fixed to the side panel that is located close to the first gear and a second end of the driving member is engaged with the first and second gears and the transmission gear and is then engaged with the first and second gears of the driving member. A second pawl is connected to the second rotating column at the other end of the collection wheel, the rotating gear is sleeved on the second rotating column, the end of the second rotating column is rotatably connected to the support plate, the second ratchet ring is connected to the surface of the rotating gear facing the second pawl, the second pawl is engaged with the second gear ring in the second ratchet ring, and when the rotating gear moves toward the collection wheel, the second pawl and the second gear ring are separated in the clockwise direction, and are engaged with the second gear ring in the counterclockwise direction; The rotating gear is engaged with a third rack on the lifting rod, the first rack and the second rack are arranged opposite to each other on the lifting rod, and the lifting rod is located between the driving gear and the rotating gear; The lower end of the detection paper is wound on the winding wheel, and the upper end of the detection paper is wound on the collecting wheel.

2. The formaldehyde concentration detection device according to claim 1, characterized in that: A first clamping post is provided on the outer wall of the roller, a second clamping post is provided on the outer wall of the collecting wheel, a first clamping ring is provided at the lower end of the long edge of the detection paper, and a second clamping ring is provided at the upper end of the long edge of the detection paper. The first clamping ring cooperates with the first clamping post, and the second clamping ring cooperates with the second clamping post.

3. The formaldehyde concentration detection device according to claim 2, characterized in that: The bottom of the tank body is provided with an assembly hole that passes through the accommodating cavity. The rotating seat includes two groups. The two groups of rotating seats are respectively arranged on the two end edges corresponding to the assembly holes. Both groups of rotating seats are provided with a rotating hole. The two ends of the reel are respectively rotatably connected in the rotating holes, and a baffle is detachably connected to the assembly hole.

4. The formaldehyde concentration detection device according to claim 3, characterized in that: The assembly hole is provided with an assembly groove penetrating the rotating hole, the back of the baffle is provided with an assembly column matched with the assembly groove, the reel is embedded in the assembly groove from bottom to top, and the assembly column abuts against the reel.

5. The formaldehyde concentration detection device according to claim 4, characterized in that: The invention also includes an air guide assembly, which includes an air guide seat, a fan, a power supply and a touch switch. The air guide seat is an inverted U-shaped structure, and the air guide seat is inverted and connected to the two ends of the push hole. The air guide cavity in the air guide seat is a vertical through structure. The fan is arranged on the edge of the tank cover, and the fan is horizontally placed at the upper end opening of the air guide seat. The power supply is arranged at the upper end of the tank cover, and the touch switch is arranged at the lower end of the tank cover. The touch switch faces the lifting rod, the fan is electrically connected to the power supply, and the top end of the lifting rod is abutted against the touch switch.

6. The formaldehyde concentration detection device according to claim 5, characterized in that: The linkage components, detection components and air guide components include four groups, and the four groups of linkage components, detection components and air guide components are distributed in a circular shape on the outer wall of the tank body.

7. A detection method for the formaldehyde concentration detection device according to claim 6, characterized in that: The following steps are involved: S1: Insert the first clamping ring on the test paper into the first clamping column of the reel, wind the test paper layer by layer on the reel to form a roll for use, invert the tank body and open the baffle at the bottom of the tank body, insert the reel into the rotating hole from the assembly groove, rotate the reel to extend the test paper with the second clamping ring downward to the position of the collection wheel under the action of gravity, insert the second clamping ring into the second clamping column on the collection wheel to complete the fixation of the test paper, re-assemble the baffle on the assembly hole so that the assembly column abuts against the reel to prevent the reel from falling, and then invert the tank body again, close the tank cover and fix it at the upper end opening of the tank body; S2: The tank body is lifted and brought into the room to be inspected. After the four groups of linkage components, detection components and air guide components distributed circumferentially on the tank body are aligned in the direction of the required positioning, the tank body is placed on the ground. Under the action of gravity, the tank body sinks, causing the lifting rod to move upward in the tank body. During the movement, the first rack on the lifting rod pushes the driving gear upward. The rotating driving gear pushes the second rack on the pushing rod, causing the pushing plate on the pushing rod to move toward the pushing hole, pushing the detection surface on the detection paper into the pushing hole and exposing it to the air. The third rack on the lifting rod pushes the rotating gear meshed with it upward. At this time, the collecting wheel remains stationary under the engagement of the first ratchet ring and the first pawl, and the rotating gear rotates under the separation of the second ratchet ring and the second pawl; S3: The lifting rod continues to rise and contacts the touch switch, starting the fan to rotate. The rotating fan draws the air in the air guide cavity upward, so that the air in the direction facing the air guide seat enters the air guide cavity from below and blows over the test paper exposed to the push hole, and the formaldehyde concentration data in four directions are collected simultaneously; S4: After completing data collection, the tank is lifted, and the lifting rod moves downward under the action of gravity, first disconnecting the contact with the touch switch, causing the fan to stop rotating and stopping the formaldehyde concentration data collection at that location; S5: The first rack on the lifting rod pushes the driving gear downward, and the rotating driving gear pushes the second rack on the pushing rod back, so that the pushing plate on the pushing rod gradually moves away from the pushing hole, and the detection paper is suspended in the accommodating cavity again. The third rack on the lifting rod pushes the rotating gear meshed with it downward. At this time, the collecting wheel can rotate under the separation of the first ratchet ring and the first pawl. The rotating gear is driven by the third rack to rotate under the engagement of the second ratchet ring and the second pawl, and the collecting wheel is driven to rotate at the same time. Therefore, the detection paper will move upward during the rotation of the collecting wheel, and the detection paper whose lower end has not yet collected data will be stopped between the pushing hole and the pushing plate; S6: Place the tank at different locations in the room to be tested to collect formaldehyde concentration data, and collect the collected samples in a step-by-step manner on the test paper.

Images