A formaldehyde detection alarm device for indoor air detection

Abstract

The present invention relates to the field of air detection, specifically a formaldehyde detection alarm device for indoor air detection, comprising a base, a column fixedly installed on the top of the base, a sampling column slot opened downward on the top of the column, a sampling column slidably installed up and down in the sampling column slot, a plurality of sampling tube slots opened on the outer side of the sampling column, a hollow sampling tube hingedly installed at the bottom of each sampling tube slot, a sampling tube flipping assembly acting on a plurality of sampling tubes arranged on the sampling column, two groups of sampling notches distributed up and down are penetrated on the outer side of each sampling tube, a sampling height adjustment assembly capable of shielding one group of sampling notches is arranged on the outer side of the sampling tube, and an alarm is installed on the top of the sampling tube. The present invention can sample air at a specified height through a plurality of sampling tubes, the alarm can warn when the formaldehyde content exceeds the standard, and the function of single or multiple point sampling detection can be realized through a single-point multi-point sampling assembly.

Description

Technical Field

[0001] The invention relates to the technical field of air detection, and in particular to a formaldehyde detection alarm device for indoor air detection. Background Art

[0002] Indoor air quality testing is a technical process of analyzing and testing indoor air pollutants that exceed the standard caused by interior decoration and furniture purchase. The most common indoor air pollutant is formaldehyde. Formaldehyde is a colorless gas with a pungent odor. After the decoration is completed, the house will contain a large amount of formaldehyde. Excessive formaldehyde content will cause harm to people's health. Therefore, it is necessary to test the indoor formaldehyde content. Currently, common formaldehyde detection tools are divided into two categories: formaldehyde detection kits and formaldehyde detectors.

[0003] However, due to the different placement of furniture and other items in the room, the formaldehyde content at each point is also different (that is, the formaldehyde content in the air near the furniture is higher than that in the open space, and the formaldehyde specific gravity is greater than that of the air, so the formaldehyde content in the lower layer of the room is greater than that in the upper layer). Therefore, when using the above two types of detection tools for detection, they are usually placed at a fixed point for detection. When the detection point needs to be changed, the position of the detection tool needs to be moved to realize multi-point detection operations.

[0004] Therefore, when using existing formaldehyde detection tools, due to the lack of a multi-point sampling and detection structure, it is impossible to automatically sample and detect different points in the room at the same time. The tool needs to be moved multiple times to complete the multi-point sampling and detection, and each sampling takes a certain amount of time, which results in a long operation time for indoor formaldehyde detection. Moreover, existing detection tools do not have the function of warning when formaldehyde exceeds the standard. For users who do not know the national standards, they cannot quickly know whether the indoor formaldehyde content exceeds the standard.

[0005] Therefore, the present invention provides a formaldehyde detection alarm device for indoor air detection to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a formaldehyde detection alarm device for indoor air detection to solve the problem that the formaldehyde detection tools in the prior art can only perform sampling and detection at a single point when in use.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A formaldehyde detection alarm device for indoor air detection, comprising a base, a column fixedly installed on the top of the base, a sampling column slot opened downward on the top of the column, a sampling column slidably installed in the sampling column slot, a plurality of sampling tube slots opened on the outer side of the sampling column, a hollow sampling tube hingedly installed at the bottom end of each sampling tube slot, a sampling tube flipping assembly acting on the plurality of sampling tubes arranged on the sampling column, two groups of sampling notches distributed up and down are penetrated on the outer side of each sampling tube, a sampling height adjustment assembly capable of covering one group of sampling notches is arranged on the outer side of the sampling tube, and an alarm is installed on the top of the sampling tube;

[0009] A detection cavity is provided at the bottom of the base, and multiple formaldehyde detectors are installed in the detection cavity, each of the formaldehyde detectors is respectively connected to a detection air inlet pipe and a detection air outlet pipe, a sampling air inlet pipe assembly is arranged between the detection air inlet pipe on each formaldehyde detector and one of the sampling tubes, an air outlet assembly is installed on the outer surface of the bottom end of the column, and the detection air outlet pipes on multiple formaldehyde detectors are all connected to the air outlet assembly, and a single-point multi-point sampling assembly located between the multiple detection air inlet pipes and the sampling air inlet pipe assembly is rotatably installed on the top surface of the detection cavity.

[0010] Preferably, a plurality of column lifting grooves are formed on the inner side surface of the sampling column groove, which are evenly distributed in a circle and penetrate upward through the top surface of the column. Blocks are fixedly installed on the top ends of the plurality of column lifting grooves. A plurality of column lifting blocks located in the plurality of column lifting grooves are fixedly installed on the bottom end of the sampling column. A column lifting motor is fixedly installed on the top of one of the block blocks. The rotating shaft of the column lifting motor penetrates downward into the column lifting groove, and a column lifting screw rod which cooperates with the thread of the column lifting block is coaxially fixedly installed.

[0011] Preferably, the sampling tube flip assembly comprises an articulated seat, a flip arc rack, a flip worm, a flip drive chamber, a flip bevel gear, a flip motor, and a drive bevel gear;

[0012] A hinged rod is fixedly installed in each sampling tube slot, a hinged seat rotatably matched with the hinged rod is fixedly installed at the bottom of each sampling tube, a flip arc rack is fixedly installed on the outside of each hinged seat, a flip worm gear meshing with the flip arc rack is rotatably installed inside each sampling tube slot, a flip driving cavity is opened at the bottom of the sampling column, the axis of each flip worm gear passes through the flip driving cavity and is coaxially fixedly connected with a flip bevel gear, a flip motor is installed in the flip driving cavity, and a driving bevel gear meshing with multiple flip bevel gears is coaxially fixedly installed on the rotating shaft of the flip motor.

[0013] Preferably, the sampling height adjustment assembly comprises a sampling mesh cover, a sampling telescopic tube, a mesh cover pull plate, a spring plate, and a mesh cover spring;

[0014] A sampling mesh cover is coaxially mounted on the outer side of the sampling tube, sampling telescopic tubes are fixedly mounted on the outer sides of the top and bottom ends of the sampling tube, one end of the two sampling telescopic tubes close to the sampling mesh cover is fixedly connected to the sampling mesh cover respectively, a mesh cover pull plate is fixedly mounted on the outer side of the sampling mesh cover, a spring plate is fixedly mounted on the outer side of the top end of the sampling tube, and a mesh cover spring is fixedly mounted between the mesh cover pull plate and the spring plate.

[0015] Preferably, the sampling height adjustment component further includes a mesh cover pull plate slot, a mesh cover pull rope hole, a mesh cover rope shaft, a mesh cover pull rope, a rope shaft rod, and a mesh cover rope shaft motor;

[0016] A mesh cover pull plate groove is provided on the inner wall of each sampling tube groove, a mesh cover pull rope hole is penetrated between each mesh cover pull plate groove and the flip drive cavity, a mesh cover rope shaft is rotatably installed inside the flip drive cavity, a plurality of mesh cover pull ropes are wound around the mesh cover rope shaft, each mesh cover pull rope passes through one of the mesh cover pull rope holes and is fixedly connected to the bottom of one of the mesh cover pull plates, a rope shaft rod is coaxially fixedly connected to the top of the mesh cover rope shaft and penetrates upwardly through the top surface of the sampling column, and a mesh cover rope shaft motor connected to the rope shaft rod is fixedly installed on the top of the sampling column.

[0017] Preferably, a filter cotton rod is detachably installed inside the sampling tube, and a sampling filter cotton located below the two groups of sampling notches is fixedly installed on the outside of the filter cotton rod.

[0018] Preferably, two groups of low-altitude sampling slots distributed in the vertical direction are passed through the outer side surface of the column and the sampling column slot, and a protective cover located at the opening of the low-altitude sampling slot is installed on the outer side surface of the column.

[0019] Preferably, the sampling air inlet pipe assembly comprises a first air hole, a second air hole, a sampling air pipe, and a lifting air pipe;

[0020] A first air hole is passed through between the bottom of each sampling tube slot and the bottom surface of the sampling column, a plurality of second air holes are passed through between the sampling column slot and the detection cavity, a sampling air pipe is fixedly connected between each sampling tube and the top of the first air hole below it, a lifting air pipe is fixedly connected between one of the first air holes and one of the second air holes, and each of the detection air inlet pipes is connected to one of the second air holes.

[0021] Preferably, the air outlet assembly includes an air outlet slot, an air outlet hole, an air outlet grille cover, an air outlet gear ring, an air outlet fan blade, an air outlet motor, and an air outlet gear;

[0022] A plurality of air outlet slots evenly distributed in a circle are provided on the outer surface of the bottom end of the column, an air outlet hole is penetrated between each of the air outlet slots and the detection cavity, and each of the air outlet holes is connected to one of the detection air outlet ducts, an air outlet grille cover is coaxially fixedly mounted on the outer surface of the bottom end of the column, an air outlet gear ring is rotatably mounted on the top surface of the air outlet grille cover, a plurality of air outlet fan blades distributed in a circle are mounted on the bottom of the air outlet gear ring, an air outlet motor is fixedly mounted on the top of the air outlet grille cover, a rotating shaft of the air outlet motor penetrates into the interior of the air outlet grille cover and an air outlet gear meshing with the air outlet gear ring is coaxially fixedly mounted thereon.

[0023] Preferably, the single-point multi-point sampling assembly includes a switching turntable, a turntable air hole, a switching slide, a switching slider, a switching spring, a switching motor, a switching rope shaft, a switching pull rope, and a turntable motor;

[0024] A switching turntable is rotatably installed on the top surface of the detection chamber, and a plurality of turntable air holes are penetrated between the upper and lower side surfaces of the switching turntable, and the turntable air holes are used to connect the second air hole and the detection air inlet pipe, and a switching slide groove facing the axis of the switching turntable is opened on the side surfaces of the other plurality of turntable air holes except one of the turntable air holes. A switching slider that can block the turntable air hole is slidably installed in each of the switching slide grooves, and a switching spring is fixedly installed between one end of the switching slider away from the turntable air hole and the switching slide groove, a motor slot is opened in the middle of the bottom surface of the switching turntable and a switching motor is installed, a switching rope shaft is coaxially fixedly installed on the rotating shaft of the switching motor, and a plurality of switching pull ropes are wound around the switching rope shaft, and the free end of each switching pull rope penetrates into the switching slide groove and is fixedly connected to the switching slider, and a turntable motor is fixedly installed in the middle of the bottom surface of the sampling column slot, and the rotating shaft of the turntable motor penetrates downward into the detection chamber and is fixedly connected to the switching turntable.

[0025] The beneficial effects of the present invention are:

[0026] 1. The sampling tube flipping assembly can make the top ends of multiple sampling tubes flip outward at the same time, so that the multiple sampling tubes can be in different directions and different heights for air sampling. The sampling slots at different heights can realize the sampling and detection of air at different heights. A sampling height adjustment assembly that can cover one group of sampling slots is provided on the outer surface of the sampling tube. By covering one group of sampling slots through the sampling height adjustment assembly, multiple sampling tubes can sample air at a specified height. An alarm is installed on the top of the sampling tube. If the formaldehyde content in the detected air exceeds the standard, the alarm will warn the user to remind the user that the formaldehyde content exceeds the standard.

[0027] 2. When working, the air outlet component can drive multiple samplers to perform air sampling. The sampled air can reach the detection air inlet pipe through the sampling air inlet pipe component, and then enter the formaldehyde detector for detection. The detected air can then be discharged through the detection air outlet pipe. A single-point multi-point sampling component located between the multiple detection air inlet pipes and the sampling air inlet pipe component is rotatably installed on the top surface of the detection cavity. The single-point multi-point sampling component can realize switching between the functions of single-point sampling detection or simultaneous sampling detection of multiple points.

[0028] 3. When the mesh cover rope shaft rotates, multiple mesh cover pull ropes can be wound or released at the same time. When multiple mesh cover pull ropes are wound, multiple mesh cover pull plates can be pulled, thereby driving multiple sampling mesh covers to move toward the sampling slots below. When multiple mesh cover pull ropes are released, multiple mesh cover pull plates lose traction, and multiple sampling mesh covers can move and reset to the sampling slots above under the elastic force of the mesh cover spring, thereby realizing the sampling mesh cover switching between two sampling slots at different heights, thereby achieving the effect of sampling air at different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0030] Figure 2 It is a three-dimensional cross-sectional view of the present invention.

[0031] Figure 3 It is a top view of the cross-section of the column and the sampling column of the present invention.

[0032] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle.

[0033] Figure 5 For the present invention Figure 2 Enlarged view of point B in the middle.

[0034] Figure 6 It is a three-dimensional schematic diagram of the sampling column of the present invention after it is raised and the sampling tube is turned outward.

[0035] Figure 7 It is a three-dimensional cross-sectional view of the sampling column of the present invention after it is raised and the sampling tube is turned outward.

[0036] Figure 8 For the present invention Figure 6 Enlarged view of point C in the middle.

[0037] Fig. 9 For the present invention Figure 7 Enlarged view of point D in the middle.

[0038] Fig.10 For the present invention Figure 7Enlarged view of point E in the middle.

[0039] Fig.11 For the present invention Figure 7 Enlarged view of point F in the middle.

[0040] Fig.12 For the present invention Fig.11 Enlarged view of point G in the middle.

[0041] In the figure: 01, alarm; 02, low-altitude sampling slot; 03, protective cover; 1, base; 2, column; 3, sampling column slot; 4, sampling column; 5, sampling tube slot; 6, sampling tube; 7, sampling tube flip assembly; 8, sampling notch; 9, sampling height adjustment assembly; 10, detection chamber; 11, formaldehyde detector; 12, detection air inlet pipe; 13, detection air outlet pipe; 14, sampling air inlet pipe assembly; 15, air outlet assembly; 16, single-point multi-point sampling assembly; 17, column lifting slot; 18, block; 19, column lifting block; 20, column lifting motor; 21, column lifting screw; 22, hinged seat; 23, flip arc rack; 24, flip worm; 25, flip drive chamber; 26, flip bevel gear; 27, flip motor; 28, drive bevel gear; 29, Sampling mesh cover; 30, sampling telescopic cylinder; 31, mesh cover pull plate; 32, spring plate; 33, mesh cover spring; 34, mesh cover pull plate slot; 35, mesh cover pull rope hole; 36, mesh cover rope shaft; 37, mesh cover pull rope; 38, rope shaft rod; 39, mesh cover rope shaft motor; 40, filter cotton rod; 41, sampling filter cotton; 42, first air hole; 43, second air hole; 44, sampling air pipe; 45, lifting air pipe; 46, air outlet slot; 47, air outlet air hole; 48, air outlet grille cover; 49, air outlet gear ring; 50, air outlet fan blades; 51, air outlet motor; 52, air outlet gear; 53, switching turntable; 54, turntable air hole; 55, switching slide slot; 56, switching slider; 57, switching spring; 58, switching motor; 59, switching rope shaft; 60, switching pull rope; 61, turntable motor. DETAILED DESCRIPTION

[0042] The following will refer to the attached Figure 1 To Attachment Fig.12 Various embodiments of the present invention are described in detail.

[0043] Embodiment 1, as attached Figure 1-Figure 12As shown, a formaldehyde detection alarm device for indoor air detection comprises a base 1, a column 2 is fixedly installed on the top of the base 1, wheels can be installed on the bottom of the base 1 for easy movement, a sampling column groove 3 is downwardly opened on the top of the column 2, a sampling column 4 is slidably installed in the sampling column groove 3, the sampling column 4 can rise upward from the inside of the sampling column groove 3, a plurality of sampling tube grooves 5 are opened on the outer surface of the sampling column 4, the number of the sampling tube grooves 5 in this embodiment is four, and can also be set to other numbers such as three or six, each of the bottom ends of the sampling tube grooves 5 is hingedly installed with an internal hollow sampling tube 6, a sampling tube flipping assembly 7 acting on the plurality of sampling tubes 6 is provided on the sampling column 4, the sampling tube flipping assembly 7 can make the top ends of the plurality of sampling tubes 6 flip outward at the same time, so that the plurality of sampling tubes 6 can be moved to the attached Figure 6 The position shown in the figure makes it possible to sample air at different positions and heights. The outer side of each sampling tube 6 is penetrated by two groups of sampling notches 8 distributed up and down. Each group of sampling notches 8 has three sampling notches 8 and is evenly distributed around the circumference. The sampling notches 8 at different heights can realize sampling and testing of air at different heights. The outer side of the sampling tube 6 is provided with a sampling height adjustment component 9 that can cover one group of sampling notches 8. By covering one group of sampling notches 8 with the sampling height adjustment component 9, the sampling tube can sample air at a specified height. An alarm 01 is installed on the top of the sampling tube 6. If the formaldehyde content in the detected air exceeds the standard, the alarm 01 will warn the user to remind the user that the formaldehyde content exceeds the standard.

[0044] A detection chamber 10 is provided at the bottom of the base 1, and a plurality of formaldehyde detectors 11 are installed in the detection chamber 10. The formaldehyde detectors 11 are all connected to a power source and electrically connected to the alarm 01. When formaldehyde is detected to be excessive, an alarm 01 can be used to give an alarm. Each of the formaldehyde detectors 11 is respectively connected to a detection air inlet pipe 12 and a detection air outlet pipe 13. A sampling air inlet pipe assembly 14 is provided between the detection air inlet pipe 12 on each of the formaldehyde detectors 11 and one of the sampling tubes 6. An air outlet assembly 15 is installed on the outer side of the bottom end of the column 2. The detection air outlet pipes 13 on the plurality of formaldehyde detectors 11 are It is connected to the air outlet component 15, and the air outlet component 15 can drive multiple sampling tubes 6 to sample the air when working. The sampled air can reach the detection air inlet pipe 12 through the sampling air inlet pipe component 14, and then enter the formaldehyde detector 11 for detection, and then the detected air can be discharged through the detection air outlet pipe 13. A single-point multi-point sampling component 16 located between the multiple detection air inlet pipes 12 and the sampling air inlet pipe component 14 is rotatably installed on the top surface of the detection chamber 10. The single-point multi-point sampling component 16 can be used to switch between the functions of single-point sampling detection or simultaneous sampling detection of multiple points.

[0045] Embodiment 2, based on embodiment 1, as shown in the attached Figure 3 , Figure 4 , Fig.10 As shown, a plurality of column lifting grooves 17 are provided on the inner side surface of the sampling column groove 3, which are evenly distributed in a circumference and penetrate upward through the top surface of the column 2. Blocks 18 are fixedly installed on the tops of the plurality of column lifting grooves 17. A plurality of column lifting blocks 19 located in the plurality of column lifting grooves 17 are fixedly installed on the bottom end of the sampling column 4. A column lifting motor 20 is fixedly installed on the top of one of the block 18. The column lifting motor 20 is connected to a power supply and a controller. The rotating shaft of the column lifting motor 20 penetrates downward into the column lifting groove 17, and a column lifting screw rod 21 threadedly matched with the column lifting block 19 is coaxially fixedly installed. When sampling and detection are required, the column lifting motor 20 can be started to drive the column lifting screw rod 21 to rotate, thereby driving the column lifting block 19 to move upward, so that the sampling column 4 rises upward from the inside of the sampling column groove 3, and then sampling and detection can be carried out through the sampling tube 6.

[0046] Embodiment 3, based on embodiment 1, as shown in the attached Figure 5 , Fig.10 As shown, the sampling tube flip assembly 7 includes an articulated seat 22, a flip arc rack 23, a flip worm 24, a flip drive chamber 25, a flip bevel gear 26, a flip motor 27, and a drive bevel gear 28;

[0047] A hinge rod is fixedly installed in each sampling tube slot 5, and a hinge seat 22 that rotatably cooperates with the hinge rod is fixedly installed at the bottom of each sampling tube 6. A flip arc rack 23 is fixedly installed on the outer side of each hinge seat 22. A flip worm 24 that meshes with the flip arc rack 23 is rotatably installed inside each sampling tube slot 5. A flip driving cavity 25 is opened at the bottom of the sampling column 4. The shaft of each flip worm 24 passes through the flip driving cavity 25 and is coaxially fixedly connected with a flip bevel gear 26. A flip motor 27 is installed in the flip driving cavity 25. The flip motor 27 is connected to a power supply and a controller. A driving bevel gear 28 that meshes with multiple flip bevel gears 26 is coaxially fixedly installed on the rotating shaft of the flip motor 27.

[0048] When the sampling column 4 rises upward, the flip motor 27 can be started to drive the driving bevel gear 28 to rotate, and the driving bevel gear 28 drives the four flip bevel gears 26 to rotate synchronously, so that the four flip worm gears 24 rotate synchronously and mesh with the four flip arc racks 23, thereby driving the four articulated seats 22 to rotate, so that the four sampling tubes 6 are flipped outward at the same time.

[0049] Embodiment 4, based on embodiment 3, as shown in the attached Figure 8 , Fig. 9 As shown, the sampling height adjustment assembly 9 includes a sampling mesh cover 29, a sampling telescopic tube 30, a mesh cover pull plate 31, a spring plate 32, and a mesh cover spring 33;

[0050] A sampling mesh cover 29 is coaxially sleeved on the outer surface of the sampling tube 6, and sampling telescopic tubes 30 are fixedly installed on the outer surfaces of the top and bottom ends of the sampling tube 6. One end of the two sampling telescopic tubes 30 close to the sampling mesh cover 29 is fixedly connected to the sampling mesh cover 29, and a mesh cover pull plate 31 is fixedly installed on the outer surface of the sampling mesh cover 29. A spring plate 32 is fixedly installed on the outer surface of the top end of the sampling tube 6, and a mesh cover spring 33 is fixedly installed between the mesh cover pull plate 31 and the spring plate 32.

[0051] As attached Figure 8 , Fig. 9 As shown, at this time, the sampling mesh cover 29 is at the position of the upper sampling slot 8. At this time, the sampling tube 6 can sample the air in the upper layer. When it is necessary to sample the air in the lower layer, the mesh cover pull plate 31 can be pulled downward, thereby driving the sampling mesh cover 29 to move downward on the outside of the sampling tube 6 to the position of the lower sampling slot 8. While the sampling mesh cover 29 moves, the mesh cover spring 33 can be stretched to store force, and the sampling telescopic tube 30 connected to its two ends undergoes corresponding telescopic changes, which can cover the other group of sampling slots 8.

[0052] Embodiment 5, based on embodiment 4, as shown in the attached Figure 5 , Figure 8-Figure 10 As shown, the sampling height adjustment assembly 9 also includes a mesh cover pull plate slot 34, a mesh cover pull rope hole 35, a mesh cover rope shaft 36, a mesh cover pull rope 37, a rope shaft rod 38, and a mesh cover rope shaft motor 39;

[0053] A mesh cover plate groove 34 is provided on the inner wall of each of the sampling tube grooves 5, and a mesh cover rope hole 35 is penetrated between each of the mesh cover plate grooves 34 and the flip driving chamber 25. A mesh cover rope shaft 36 is rotatably installed inside the flip driving chamber 25, and a plurality of mesh cover ropes 37 are wound around the mesh cover rope shaft 36. Each of the mesh cover ropes 37 passes through one of the mesh cover rope holes 35 and is fixedly connected to the bottom of one of the mesh cover plates 31. A rope shaft rod 38 that passes upward through the top surface of the sampling column 4 is coaxially fixedly connected to the top of the mesh cover rope shaft 36. A mesh cover rope shaft motor 39 connected to the rope shaft rod 38 is fixedly installed on the top of the sampling column 4, and the mesh cover rope shaft motor 39 is connected to a power supply and a controller.

[0054] When the mesh cover rope shaft motor 39 is started, the mesh cover rope shaft 36 can be driven to rotate, and when it rotates, multiple mesh cover pull ropes 37 can be wound or released at the same time. When the multiple mesh cover pull ropes 37 are wound, the multiple mesh cover pull plates 31 can be pulled, thereby driving the multiple sampling mesh covers 29 to move toward the sampling slots 8 below. When the multiple mesh cover pull ropes 37 are released, the multiple mesh cover pull plates 31 lose traction, and the multiple sampling mesh covers 29 can be moved and reset to the sampling slots 8 above under the elastic force of the mesh cover spring 33, thereby realizing the switching of the sampling mesh cover between the sampling slots 8 at two different heights, thereby achieving the effect of sampling air at different heights.

[0055] Embodiment 6, based on embodiment 1, as shown in the attached Fig. 9 As shown, a filter cotton rod 40 is detachably installed inside the sampling tube 6, and a sampling filter cotton 41 located below the two groups of sampling slots 8 is fixedly installed on the outside of the filter cotton rod 40. The top of the sampling tube 6 is detachable, and the filter cotton rod 40 can be installed after the top is opened. The sampling filter cotton 41 can filter dust impurities in the air to prevent dust from adhering to the formaldehyde detector 11 and affecting the formaldehyde detection results.

[0056] Embodiment 7, based on embodiment 1, as shown in the attached Figure 1-Figure 4 As shown, two groups of low-altitude sampling slots 02 distributed in the vertical direction are penetrated between the outer side of the column 2 and the sampling column slot 3, and a protective cover 03 located at the opening of the low-altitude sampling slot 02 is installed on the outer side of the column 2, as shown in the attached Figure 2 , Figure 4 As shown, when the sampling column 4 is inside the sampling column slot 3, the height of the sampling slot 8 on the sampling tube 6 corresponds to the height of the low-altitude sampling slot 02. At this time, the air at the low-altitude sampling slot 02 can be sampled through the sampling tube 6. The protective cover 03 can filter dust and impurities in the air and also play a protective role.

[0057] Embodiment 8, based on embodiment 1, as shown in the attached Figure 5 , Fig.10 , Fig.11 As shown, the sampling air inlet pipe assembly 14 includes a first air hole 42, a second air hole 43, a sampling air pipe 44, and a lifting air pipe 45;

[0058] A first air hole 42 is passed through between the bottom of each sampling tube slot 5 and the bottom surface of the sampling column 4, a plurality of second air holes 43 are passed through between the sampling column slot 3 and the detection chamber 10, a sampling air pipe 44 is fixedly connected between each sampling tube 6 and the top of the first air hole 42 below it, a lifting air pipe 45 is fixedly connected between one of the first air holes 42 and one of the second air holes 43, and each of the detection air inlet pipes 12 is connected to one of the second air holes 43;

[0059] When the sampling column 4 is inside the sampling column slot 3, the lifting air pipe 45 is accumulated in the space below the sampling column 4. When the sampling column 4 rises upward, it can drive the lifting air pipe 45 to move upward. The air collected by multiple sampling tubes 6 can pass through the sampling air pipe 44, the first air hole 42, the lifting air pipe 45 and the second air hole 43 in sequence, and reach the inside of the corresponding detection air inlet pipe 12, and enter the inside of the corresponding formaldehyde detector 11 through the detection air inlet pipe 12 for detection, thereby realizing the operation of sampling and detecting the air at multiple points in the room, and then the detected air can reach the inside of the air outlet component 15 through multiple detection air outlet pipes 13 and be discharged.

[0060] Embodiment 9, based on embodiment 1, as shown in the attached Fig.11 As shown, the air outlet assembly 15 includes an air outlet slot 46, an air outlet hole 47, an air outlet grille cover 48, an air outlet gear ring 49, an air outlet fan blade 50, an air outlet motor 51, and an air outlet gear 52;

[0061] A plurality of air outlet slots 46 evenly distributed in a circumference are provided on the outer surface of the bottom end of the column 2, an air outlet hole 47 is penetrated between each of the air outlet slots 46 and the detection chamber 10, and each of the air outlet holes 47 is connected to one of the detection air outlet pipes 13, an air outlet grille cover 48 is coaxially fixedly installed on the outer surface of the bottom end of the column 2, an air outlet gear ring 49 is rotatably installed on the top surface of the air outlet grille cover 48, a plurality of air outlet fan blades 50 distributed in a circumference are installed at the bottom of the air outlet gear ring 49, an air outlet motor 51 is fixedly installed on the top of the air outlet grille cover 48, the air outlet motor 51 is connected to a power supply and a controller, the rotating shaft of the air outlet motor 51 penetrates into the interior of the air outlet grille cover 48 and is coaxially fixedly installed with an air outlet gear 52 meshing with the air outlet gear ring 49;

[0062] When in use, the air outlet motor 51 can be started to drive the air outlet gear 52 to rotate, and the air outlet gear 52 can drive the air outlet gear ring 49 to rotate, and the air outlet gear ring 49 can drive a number of air outlet fan blades 50 to rotate. The air detected by the formaldehyde detector 11 can enter the air outlet slot 46 through the detection air outlet pipe 13 and the air outlet hole 47, and when the air outlet fan blades 50 rotate, the air inside the air outlet slot 46 can be discharged to the outside of the air outlet grille cover 48, that is, the air outlet fan blades 50 can provide power for the entire air sampling process, so that the indoor air can enter the internal circulation of the device, thereby completing the air sampling and formaldehyde detection operations.

[0063] Embodiment 10, based on embodiment 9, Fig.12As shown, the single-point multi-point sampling assembly 16 includes a switching turntable 53, a turntable air hole 54, a switching slide 55, a switching slider 56, a switching spring 57, a switching motor 58, a switching rope shaft 59, a switching pull rope 60, and a turntable motor 61;

[0064] A switching turntable 53 is rotatably installed on the top surface of the detection chamber 10, and a plurality of turntable air holes 54 are penetrated between the upper and lower side surfaces of the switching turntable 53. The turntable air holes 54 are used to connect the second air hole 43 with the detection air inlet pipe 12. Except for one of the turntable air holes 54, the sides of the other turntable air holes 54 are provided with switching slide grooves 55 facing the axis of the switching turntable 53 (the number of the turntable air holes 54 in the embodiment is four, and three of the turntable air holes 54 are provided with switching slide grooves 55), and a switching slider 56 capable of blocking the turntable air hole 54 is slidably installed in each of the switching slide grooves 55. A switching spring 57 is fixedly installed between the end of 56 away from the turntable air hole 54 and the switching slide slot 55. A motor slot is opened in the middle of the bottom surface of the switching turntable 53 and a switching motor 58 is installed. A switching rope shaft 59 is coaxially fixedly installed on the rotating shaft of the switching motor 58. A plurality of switching pull ropes 60 are wound around the switching rope shaft 59. The free end of each switching pull rope 60 passes through the switching slide slot 55 and is fixedly connected to the switching slider 56. A turntable motor 61 is fixedly installed in the middle of the bottom surface of the sampling column slot 3. The rotating shaft of the turntable motor 61 passes downward into the detection cavity 10 and is fixedly connected to the switching turntable 53.

[0065] As attached Fig.12 As shown, when the three switching sliders 56 block the corresponding turntable air holes 54 under the elastic force of their respective switching springs 57, the air outlet assembly 15 is started at this time, and only one turntable air hole 54 can allow air to pass through, so the sampling tube 6 connected to the turntable air hole 54 can realize the air sampling of a single point. When it is necessary to sample another point, the turntable motor 61 can be started at this time to drive the switching turntable 53 to rotate 90° or a corresponding angle, so that the turntable air hole 54 that is not blocked moves to the position of the sampling tube 6 that needs to be detected, thereby connecting the sampling tube 6 and the corresponding detection air inlet pipe 12, and air sampling can be performed on the point.

[0066] When multi-point sampling is required at the same time, the switching motor 58 can be started to drive the switching rope shaft 59 to rotate, thereby winding the three switching pull ropes 60. The three switching pull ropes 60 simultaneously pull the three switching sliders 56 to slide and compress the three switching springs 57, so that the three turntable air holes 54 are opened. At this time, the four sampling tubes 6 are respectively connected to the corresponding detection air inlet pipes 12, and multi-point air sampling can be carried out.

[0067] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0068] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A formaldehyde detection alarm device for indoor air detection, comprising a base (1), characterized in that: A column (2) is fixedly installed on the top of the base (1), a sampling column groove (3) is opened downward on the top of the column (2), a sampling column (4) is slidably installed in the sampling column groove (3), a plurality of sampling tube grooves (5) are opened on the outer side of the sampling column (4), a hollow sampling tube (6) is hingedly installed at the bottom of each sampling tube groove (5), a sampling tube flipping assembly (7) for acting on the plurality of sampling tubes (6) is arranged on the sampling column (4), two groups of sampling notches (8) distributed vertically are penetrated on the outer side of each sampling tube (6), a sampling height adjustment assembly (9) capable of covering one group of sampling notches (8) is arranged on the outer side of the sampling tube (6), and an alarm (01) is installed on the top of the sampling tube (6); A detection chamber (10) is provided at the bottom of the base (1), and a plurality of formaldehyde detectors (11) are installed in the detection chamber (10), and each of the formaldehyde detectors (11) is respectively connected to a detection air inlet pipe (12) and a detection air outlet pipe (13), and a sampling air inlet pipe assembly (14) is provided between the detection air inlet pipe (12) on each formaldehyde detector (11) and one of the sampling pipes (6); an air outlet assembly (15) is installed on the outer surface of the bottom end of the column (2), and the detection air outlet pipes (13) on the plurality of formaldehyde detectors (11) are all connected to the air outlet assembly (15); and a single-point multi-point sampling assembly (16) located between the plurality of detection air inlet pipes (12) and the sampling air inlet pipe assembly (14) is rotatably installed on the top surface of the detection chamber (10); The sampling tube flip assembly (7) comprises a hinge seat (22), a flip arc rack (23), a flip worm (24), a flip drive chamber (25), a flip bevel gear (26), a flip motor (27), and a drive bevel gear (28); A hinge rod is fixedly installed in each sampling tube slot (5), a hinge seat (22) rotatably matched with the hinge rod is fixedly installed at the bottom of each sampling tube (6), a flip arc rack (23) is fixedly installed on the outer side of each hinge seat (22), a flip worm (24) meshing with the flip arc rack (23) is rotatably installed inside each sampling tube slot (5), a flip drive cavity (25) is provided at the bottom of the sampling column (4), the shaft of each flip worm (24) passes through the flip drive cavity (25) and is coaxially fixedly connected with a flip bevel gear (26), a flip motor (27) is installed in the flip drive cavity (25), and a driving bevel gear (28) meshing with a plurality of flip bevel gears (26) is coaxially fixedly installed on the rotating shaft of the flip motor (27).

2. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: The inner side surface of the sampling column groove (3) is provided with a plurality of column lifting grooves (17) which are evenly distributed in a circumference and penetrate upwardly through the top surface of the column (2); the top ends of the plurality of column lifting grooves (17) are fixedly mounted with a stopper (18); the bottom end of the sampling column (4) is fixedly mounted with a plurality of column lifting blocks (19) which are respectively located in the plurality of column lifting grooves (17); the top of one of the stoppers (18) is fixedly mounted with a column lifting motor (20); the rotating shaft of the column lifting motor (20) penetrates downwardly into the column lifting groove (17), and a column lifting screw rod (21) which is threadedly matched with the column lifting block (19) is coaxially fixedly mounted.

3. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: The sampling height adjustment component (9) comprises a sampling mesh cover (29), a sampling telescopic tube (30), a mesh cover pull plate (31), a spring plate (32), and a mesh cover spring (33); A sampling mesh cover (29) is coaxially sleeved on the outer surface of the sampling tube (6), and sampling telescopic tubes (30) are fixedly installed on the outer surfaces of the top and bottom ends of the sampling tube (6), and one end of the two sampling telescopic tubes (30) close to the sampling mesh cover (29) is fixedly connected to the sampling mesh cover (29), and a mesh cover pull plate (31) is fixedly installed on the outer surface of the sampling mesh cover (29), and a spring plate (32) is fixedly installed on the outer surface of the top end of the sampling tube (6), and a mesh cover spring (33) is fixedly installed between the mesh cover pull plate (31) and the spring plate (32).

4. A formaldehyde detection alarm device for indoor air detection according to claim 3, characterized in that: The sampling height adjustment component (9) further comprises a mesh cover pull plate slot (34), a mesh cover pull rope hole (35), a mesh cover rope shaft (36), a mesh cover pull rope (37), a rope shaft rod (38), and a mesh cover rope shaft motor (39); A mesh cover pull plate groove (34) is provided on the inner wall of each sampling tube groove (5), and a mesh cover rope hole (35) is passed through between each mesh cover pull plate groove (34) and the flip drive chamber (25). A mesh cover rope shaft (36) is rotatably installed inside the flip drive chamber (25), and a plurality of mesh cover ropes (37) are wound around the mesh cover rope shaft (36). Each mesh cover rope (37) passes through one of the mesh cover rope holes (35) and is fixedly connected to the bottom of one of the mesh cover pull plates (31). The top of the mesh cover rope shaft (36) is coaxially fixedly connected with a rope shaft rod (38) that passes through the top surface of the sampling column (4) upwards, and the top of the sampling column (4) is fixedly installed with a mesh cover rope shaft motor (39) connected to the rope shaft rod (38).

5. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: A filter cotton rod (40) is detachably mounted inside the sampling tube (6), and a sampling filter cotton (41) located below the two groups of sampling notches (8) is fixedly mounted on the outside of the filter cotton rod (40).

6. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: Two groups of low-altitude sampling slots (02) distributed in the vertical direction are passed through the outer side surface of the column (2) and the sampling column slot (3), and a protective cover (03) located at the opening of the low-altitude sampling slot (02) is installed on the outer side surface of the column (2).

7. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: The sampling air inlet pipe assembly (14) comprises a first air hole (42), a second air hole (43), a sampling air pipe (44), and a lifting air pipe (45); A first air hole (42) is passed through between the bottom of each sampling tube slot (5) and the bottom surface of the sampling column (4), a plurality of second air holes (43) are passed through between the sampling column slot (3) and the detection chamber (10), a sampling air pipe (44) is fixedly connected between each sampling tube (6) and the top of the first air hole (42) below it, a lifting air pipe (45) is fixedly connected between one of the first air holes (42) and one of the second air holes (43), and each of the detection air inlet pipes (12) is connected to one of the second air holes (43).

8. A formaldehyde detection alarm device for indoor air detection according to claim 1, characterized in that: The air outlet assembly (15) comprises an air outlet slot (46), an air outlet hole (47), an air outlet grille cover (48), an air outlet gear ring (49), an air outlet fan blade (50), an air outlet motor (51), and an air outlet gear (52); A plurality of air outlet slots (46) evenly distributed in a circumference are provided on the outer surface of the bottom end of the column (2), an air outlet hole (47) is penetrated between each of the air outlet slots (46) and the detection chamber (10), and each of the air outlet holes (47) is connected to one of the detection air outlet pipes (13), an air outlet grille cover (48) is coaxially fixedly mounted on the outer surface of the bottom end of the column (2), an air outlet gear ring (49) is rotatably mounted on the top surface of the air outlet grille cover (48), a plurality of air outlet fan blades (50) distributed in a circumference are mounted at the bottom of the air outlet gear ring (49), an air outlet motor (51) is fixedly mounted on the top of the air outlet grille cover (48), a rotating shaft of the air outlet motor (51) penetrates into the interior of the air outlet grille cover (48) and is coaxially fixedly mounted with an air outlet gear (52) meshing with the air outlet gear ring (49).

9. A formaldehyde detection alarm device for indoor air detection according to claim 8, characterized in that: The single-point multi-point sampling assembly (16) comprises a switching turntable (53), a turntable air hole (54), a switching slide groove (55), a switching slider (56), a switching spring (57), a switching motor (58), a switching rope shaft (59), a switching pull rope (60), and a turntable motor (61); A switching turntable (53) is rotatably mounted on the top surface of the detection chamber (10), and a plurality of turntable air holes (54) are penetrated between the upper and lower side surfaces of the switching turntable (53), and the turntable air holes (54) are used to connect the second air hole (43) and the detection air inlet pipe (12). Except for one of the turntable air holes (54), the side surfaces of the other turntable air holes (54) are provided with switching slide grooves (55) facing the axis of the switching turntable (53), and a switching slider (56) capable of blocking the turntable air hole (54) is slidably mounted in each of the switching slide grooves (55), and the end of the switching slider (56) away from the turntable air hole (54) is in contact with the switching slide groove ( A switching spring (57) is fixedly installed between the switching turntable (53) and the sampling column slot (3). A motor slot is opened in the middle of the bottom surface of the switching turntable (53) and a switching motor (58) is installed. A switching rope shaft (59) is coaxially fixedly installed on the rotating shaft of the switching motor (58). A plurality of switching pull ropes (60) are wound around the switching rope shaft (59). The free end of each switching pull rope (60) passes through the switching slide groove (55) and is fixedly connected to the switching slider (56). A turntable motor (61) is fixedly installed in the middle of the bottom surface of the sampling column slot (3). The rotating shaft of the turntable motor (61) passes downward into the detection cavity (10) and is fixedly connected to the switching turntable (53).

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