A furniture formaldehyde detection device

Abstract

This invention relates to the field of detection device technology, specifically to a furniture formaldehyde detection device. A furniture formaldehyde detection device is used to detect formaldehyde on wood panels, including a detection mechanism comprising a detection component and a gas supply component. The detection component includes a lead screw and a gas sampling head. The gas supply component is configured to generate a bottom-up circulating airflow within a storage chamber to accelerate the release of formaldehyde from adjacent wood panels. Rotating the wood panel switches the surface of the wood panel being tested corresponding to the gas supply component, resulting in a more uniform distribution of formaldehyde in the storage chamber. At the start of sampling, the lead screw moves upward from the bottom of the storage chamber, maintaining the same flow rate as the airflow provided by the gas supply component, thus stabilizing the airflow in the area where the gas sampling head is located and reducing interference from the airflow within the storage chamber on the gas sampling head's sampling. This invention provides a furniture formaldehyde detection device to solve the problems of uneven formaldehyde distribution and poor sampling accuracy in existing formaldehyde detection devices during sampling.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, and specifically to a formaldehyde detection device for furniture. Background Technology

[0002] Formaldehyde, a potent carcinogen, is widely present in various types of engineered wood furniture, with a release period that can last from 3 to 15 years, posing a serious threat to indoor environment and human health. Consumers are increasingly concerned about the formaldehyde content in furniture. Currently, formaldehyde testing mainly relies on standard laboratory methods, which, while highly accurate, require destructive sampling of furniture, resulting in long testing cycles and high costs, failing to meet the needs of ordinary users for rapid, in-situ, and non-destructive testing of furniture. Portable air formaldehyde detectors commonly found on the market are mainly used for overall indoor air concentration measurement, making it difficult to accurately pinpoint the release source of specific furniture components. They are also susceptible to interference from environmental temperature, humidity, airflow, and other volatile organic compounds, and the measurement results cannot accurately reflect the formaldehyde release characteristics of the furniture materials themselves. Formaldehyde self-test kits are easy to operate but have extremely low accuracy, providing only a rough reference.

[0003] For example, the invention patent application with publication number CN113655180A provides a high-precision furniture formaldehyde detection device and method. By constructing a sealed testing environment of formaldehyde monitoring rack and test cover through airtight components, the interference of external factors can be eliminated to the greatest extent to obtain high-precision data.

[0004] However, when sampling the gas inside the test chamber, the actual formaldehyde release varies across different sides of the engineered wood panels due to processing errors. Furthermore, the relatively fixed positions of the stationary panel samples within the test chamber lead to concentration differences between samples. Although airflow circulates within the chamber, the time required for the airflow to evenly distribute the formaldehyde is relatively long, resulting in low efficiency.

[0005] Furthermore, the sampling ports in existing testing chambers are typically fixed at a specific location within the chamber, and sampling is done using an extraction method. Because the direction and velocity of the extracted mixed airflow deviate from the circulating airflow within the chamber, resulting in inconsistent flow rates and directions, this disrupts the uniformity of formaldehyde concentration distribution within the chamber, thereby reducing the representativeness and accuracy of the sampling. Summary of the Invention

[0006] This invention provides a furniture formaldehyde detection device to solve the problem that existing formaldehyde detection devices have uneven formaldehyde distribution and poor sampling accuracy during sampling.

[0007] The present invention provides a furniture formaldehyde detection device with the following technical solution: A furniture formaldehyde detection device for detecting formaldehyde on wood panels includes a housing and a detection mechanism, with a storage box disposed inside the housing. The detection mechanism includes detection components, multiple placement racks, and multiple gas supply components. The gas supply components are disposed inside the storage box, and the multiple gas supply components are distributed sequentially along the circumference of the storage box.

[0008] The placement racks are rotatably mounted inside the storage tank, with each rack positioned between two adjacent gas supply components along the circumference of the tank. Each rack holds a vertically oriented board. The gas supply components are configured to generate an upward circulating airflow within the storage tank, accelerating the formaldehyde release from adjacent boards. The detection component includes a horizontal lead screw and a gas sampling head. The lead screw is horizontally positioned and can slide vertically. The gas sampling head is slidably mounted on the lead screw and samples the gas within the storage tank.

[0009] The testing mechanism includes a release phase and a testing phase. During the release phase, after the board has been stationary for a preset time, it is rotated to switch the surface of the board to be tested corresponding to the gas supply component, resulting in a more uniform distribution of formaldehyde in the storage tank. During the testing phase, the gas sampling head begins sampling the gas. The horizontal lead screw moves upwards from the bottom of the storage tank, matching the flow rate of the airflow provided by the gas supply component, to minimize interference from the airflow within the storage tank on the gas sampling head's sampling.

[0010] Furthermore, the four vertical surfaces of the board are designated as the first side, the second side, the third side, and the fourth side. The first side and the second side are parallel, the third side is parallel to the fourth side, the third side is the first inspection surface, the fourth side is the second inspection surface, the first inspection surface and the second inspection surface are parallel, the first side is perpendicular to both the first and second inspection surfaces, and the second side is perpendicular to both the first and second inspection surfaces. The first and second inspection surfaces are the two planes with the largest area on the board.

[0011] In the initial state of the release phase, the first side of the panel is located at the center of the storage box, and the second side of the panel is away from the center of the storage box. At this time, a detection space is formed between two adjacent panels, and each gas supply component is located in a detection space, accelerating the release of formaldehyde from the first detection surface of one panel and the second detection surface of the other panel. After the panels are rotated 90°, each gas supply component accelerates the release of formaldehyde from the first side of one panel and the second side of the other panel.

[0012] Furthermore, the outer casing is equipped with an air outlet duct, an air inlet duct, and a recirculating air duct. The air outlet duct is located on the upper side of the storage box, and the air inlet duct is located on the lower side of the storage box. The recirculating air duct is connected to both the air outlet duct and the air inlet duct.

[0013] Each air supply assembly includes a first fan and a second fan. The first fan is fixedly installed at the bottom of the storage tank and is used to blow gas from the inlet air channel into the storage tank. The second fan is fixedly installed at the top of the storage tank and is used to draw gas from the storage tank into the outlet air channel. The gas circulates from the inlet air channel through the storage tank, the outlet air channel, and the circulation air duct.

[0014] Furthermore, the testing mechanism also includes a first drive assembly, which comprises a first motor, a first gear, and a plurality of second gears. Both the first gear and the second gear are rotatably disposed within the housing, and the axes of both the first gear and the second gear are vertically oriented.

[0015] The first gear is located in the center of the storage box, and multiple second gears are distributed sequentially along the circumference of the first gear, with the second gears meshing with the first gear. The first motor is fixedly installed inside the housing, and the output shaft of the first motor is fixedly connected to the first gear. A rotating shaft is fixedly installed in the center of each shelf, and the rotating shaft is vertically arranged, with each rotating shaft fixedly connected to a second gear.

[0016] The first motor drives multiple second gears to rotate via the first gear, which in turn drives a placement rack to rotate via each shaft, thereby causing the board to rotate.

[0017] Furthermore, the detection mechanism also includes a second drive assembly, which comprises a second motor, a rotating ring, and a third gear. Both the rotating ring and the third gear are rotatably mounted within the housing, and their axes are vertically aligned. A gear ring is provided on the inner side of the rotating ring, and both the gear ring and the rotating ring are coaxially aligned with the first gear. The third gear meshes with the gear ring. The second motor is fixedly mounted within the housing, and its output shaft is fixedly connected to the third gear.

[0018] The rotating ring has multiple first arc-shaped grooves, which are distributed sequentially along the circumference of the rotating ring. One end of each first arc-shaped groove is close to the center of the rotating ring, and the other end is away from the center of the rotating ring. Each rotating shaft is slidably disposed in one first arc-shaped groove. The rotation of the third gear drives the rotating ring to rotate, and the rotating ring drives the rotating shaft to move closer to or away from the center of the rotating ring through the first arc-shaped grooves.

[0019] Furthermore, a temporary storage channel is provided inside the outer casing, which is connected to the storage box. The detection assembly also includes a vertical lead screw, a vertical limit shaft, a sector gear, a fourth gear, and a third motor. Both the vertical lead screw and the vertical limit shaft are vertically arranged, and the vertical lead screw is rotatably arranged within the temporary storage channel. A sliding block is provided at one end of the horizontal lead screw, and the sliding block is slidably arranged on the vertical lead screw and the vertical limit shaft, with the sliding block and the vertical lead screw engaging in a helical transmission.

[0020] The sector gear and the lead screw are coaxially arranged, and the sector gear can rotate relative to the lead screw. The vertical limit shaft is fixedly mounted on the sector gear. The third motor is fixedly mounted inside the housing, and the fourth gear is fixedly mounted on the output shaft of the third motor, and the fourth gear meshes with the sector gear.

[0021] During the release phase, the lead screw is in the temporary storage channel. When switching from the release phase to the detection phase, the third motor drives the fourth gear to rotate, the fourth gear drives the sector gear to rotate, the sector gear rotates, and the vertical limit shaft rotates. The vertical limit shaft moves the lead screw from the temporary storage channel to the storage box through the sliding block.

[0022] Furthermore, the detection assembly also includes a fourth motor, which is fixedly installed inside the housing, and the output shaft of the fourth motor is fixedly connected to the lead screw.

[0023] Furthermore, the detection mechanism also includes a fifth motor and a horizontal limit rod. The horizontal limit rod is fixedly mounted on the sliding block. The horizontal limit rod and the horizontal lead screw are arranged in parallel. The gas sampling head and the horizontal limit rod are slidably connected. The gas sampling head and the horizontal lead screw are screw-driven. The horizontal lead screw and the sliding block are rotatably connected. The fifth motor is fixedly mounted on the sliding block, and the output shaft of the fifth motor is fixedly connected to the horizontal lead screw.

[0024] Furthermore, the vertical lead screw is positioned diagonally opposite the storage box. A horizontal slot is provided on the upper side of the storage box, which connects to the temporary storage channel. As the horizontal lead screw rotates from the temporary storage channel into the storage box, it passes through the horizontal slot. A vertical slot is provided at a diagonal position near the storage box and the vertical lead screw, which also connects to the temporary storage channel. The horizontal lead screw slides within the vertical slot as it moves up and down. Both the horizontal and vertical slots are equipped with sealing curtains made of elastic rubber. These curtains deform to fit the horizontal lead screw as it passes through, and close the horizontal or vertical slot when stationary.

[0025] Furthermore, the detection assembly also includes a detection box and a gas tube. The detection box is fixedly installed inside the outer shell, and the gas tube connects the detection box and the gas sampling head. An air pump is installed inside the detection box to absorb the gas in the storage box through the gas sampling head.

[0026] The beneficial effects of this invention are as follows: The furniture formaldehyde detection device of this invention, through a set detection mechanism, places each board on a shelf. The detection mechanism is initially in a release phase, with the boards stationary in the storage box. The air supply component is configured to generate a bottom-up circulating airflow within the storage box to accelerate the formaldehyde release from adjacent boards. After the boards have been stationary for a preset time, they are rotated to agitate the gas within the storage box, resulting in a more uniform distribution of formaldehyde. Furthermore, rotating the boards switches the surface of the board being tested corresponding to the air supply component, further enhancing the uniform distribution of formaldehyde within the storage box.

[0027] Next, the detection phase begins. The gas sampling head starts sampling the gas. The horizontal lead screw moves upward from the bottom of the storage tank and is at the same speed as the airflow provided by the gas supply component, so as to keep the airflow in the area where the gas sampling head is located stable and reduce the interference of the airflow in the storage tank on the gas sampling head sampling.

[0028] At the start of each test run, move the gas sampling head to the bottom of the storage tank. Because the gas inside the storage tank circulates, the gas reaching the bottom may differ each time. When it is necessary to test gas at different locations, move the gas sampling head to change the relative position of the gas sampling head and the lead screw, increasing the number of sampling points and thus improving detection accuracy. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a furniture formaldehyde detection device provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a furniture formaldehyde detection device after removing the outer shell, as provided in an embodiment of the present invention.

[0032] Figure 3 This is a cross-sectional view of a furniture formaldehyde detection device provided in an embodiment of the present invention;

[0033] Figure 4 This is a front view of a furniture formaldehyde detection device provided in an embodiment of the present invention;

[0034] Figure 5 for Figure 4 Sectional view along the middle AA direction;

[0035] Figure 6 This is a schematic diagram of the structure of a furniture formaldehyde detection device after the board material is rotated, according to an embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of the detection mechanism of a furniture formaldehyde detection device in the detection stage, provided by an embodiment of the present invention.

[0037] Figure 8 for Figure 4 Sectional view along the BB direction;

[0038] Figure 9 for Figure 4 A cross-sectional view along the CC direction;

[0039] Figure 10 for Figure 5 A sectional view along the DD direction.

[0040] In the diagram: 100, outer casing; 101, sheet metal; 102, storage box; 103, placement rack; 104, first fan; 105, circulating air duct; 106, second fan; 110, air outlet duct; 111, air inlet duct; 112, installation duct; 113, temporary storage duct; 201, gas sampling head; 202, horizontal lead screw; 203, horizontal limit rod; 206, detection box; 207, vertical limit shaft; 208, vertical lead screw; 209, sealing... 210. Air pipe; 301. Rotary ring; 302. Third gear; 303. First gear; 304. Second gear; 305. Sector gear; 307. Fourth gear; 310. First arc-shaped slide groove; 311. First slide groove; 312. Second arc-shaped slide groove; 320. Rotating shaft; 401. First motor; 402. Second motor; 403. Third motor; 404. Fourth motor; 405. Fifth motor; 410. Sliding block. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Reference Figures 1 to 10 As shown, the furniture formaldehyde detection device provided in Embodiment 1 of the present invention is used to detect formaldehyde on board 101, including a shell 100 and a detection mechanism, and a storage box 102 is provided inside the shell 100.

[0043] The testing mechanism includes testing components, multiple placement racks 103, and multiple air supply components. The air supply components are located inside the storage tank 102, and the multiple air supply components are distributed sequentially along the circumference of the storage tank 102.

[0044] Placement racks 103 are rotatably mounted within storage tank 102, with each rack positioned between two adjacent gas supply components along the circumference of storage tank 102. Each rack 103 has a vertically oriented plate 101 mounted on it. The gas supply components are configured to generate an upward circulating airflow within storage tank 102, accelerating the release of formaldehyde from adjacent plates 101. The detection component includes a horizontal lead screw 202 and a gas sampling head 201. The horizontal lead screw 202 is horizontally positioned and can slide vertically. The gas sampling head 201 is slidably mounted on the horizontal lead screw 202 and samples the gas within storage tank 102.

[0045] The testing mechanism includes a release phase and a testing phase. During the release phase, after the board 101 has been stationary for a preset time, it is rotated to switch the surface of the board 101 to be tested corresponding to the gas supply component, resulting in a more uniform distribution of formaldehyde in the storage box 102. During the testing phase, the gas sampling head 201 begins sampling the gas. The horizontal lead screw 202 moves upward from the bottom of the storage box 102, maintaining the same flow rate as the airflow provided by the gas supply component, to minimize interference from the airflow within the storage box 102 on the sampling by the gas sampling head 201.

[0046] Each board 101 is placed on a rack 103. The testing mechanism is initially in the release phase, with the board 101 stationary within the storage box 102. The air supply assembly is configured to generate an upward circulating airflow within the storage box 102 to accelerate the formaldehyde release from adjacent boards 101. After the board 101 has been stationary for a preset time, it is rotated to agitate the gas within the storage box 102, ensuring a more uniform distribution of formaldehyde. Furthermore, rotating the board 101 switches the surface of the board 101 being tested corresponding to the air supply assembly, further enhancing the uniform distribution of formaldehyde within the storage box 102.

[0047] Next, the detection phase begins. The gas sampling head 201 starts sampling the gas. The horizontal screw 202 moves upward from the bottom of the storage tank 102 and is at the same speed as the airflow provided by the gas supply component, so as to keep the airflow in the area where the gas sampling head 201 is located stable and reduce the interference of the airflow in the storage tank 102 on the sampling of the gas sampling head 201.

[0048] At the start of each test run, the gas sampling head 201 is moved to the bottom of the storage tank 102. Since the gas inside the storage tank 102 is circulating, the gas reaching the bottom of the storage tank 102 may differ each time. When it is necessary to test gas at different locations, the gas sampling head 201 is moved to change the relative position of the gas sampling head 201 and the lead screw 202, increasing the number of sampling points for the gas sampling head 201 and thus improving the detection accuracy.

[0049] In this embodiment, the four vertical surfaces of the board 101 are a first side, a second side, a first inspection surface, and a second inspection surface. The first side and the second side are parallel, as are the first inspection surface and the second inspection surface. The first side is perpendicular to both the first and second inspection surfaces, and the second side is also perpendicular to both the first and second inspection surfaces. The first and second inspection surfaces are the two planes with the largest areas on the board 101. The first and second inspection surfaces are the main surfaces to be inspected.

[0050] In the initial state of the release phase, the first side of the board 101 is located at the center of the storage box 102, and the second side of the board 101 is away from the center of the storage box 102. At this time, a detection space is formed between two adjacent boards 101, and each gas supply component is in a detection space, which accelerates the release of formaldehyde from the first detection surface of one board 101 and the second detection surface of the other board 101.

[0051] When the placement rack 103 rotates, it causes the plate 101 to rotate as well. As the plate 101 rotates, the connecting area between adjacent detection spaces increases or decreases. When the connecting area increases, it is easier for the gases in the storage box 102 to mix. After the plate 101 rotates 90°, each gas supply component accelerates the release of formaldehyde from the first side of one plate 101 and the second side of the other plate 101.

[0052] In this embodiment, the outer casing 100 is provided with an air outlet duct 110, an air inlet duct 111, and a circulating air duct 105. The air outlet duct 110 is located on the upper side of the storage box 102, and the air inlet duct 111 is located on the lower side of the storage box 102. The circulating air duct 105 is connected to the air outlet duct 110 and the air inlet duct 111, respectively.

[0053] Each air supply assembly includes a first fan 104 and a second fan 106. The first fan 104 is fixedly installed at the bottom of the storage tank 102 and is used to blow the gas in the air inlet channel 111 into the storage tank 102. The second fan 106 is fixedly installed at the top of the storage tank 102 and is used to draw the gas in the storage tank 102 into the air outlet channel 110. The gas circulates from the air inlet channel 111 through the storage tank 102, the air outlet channel 110, and the circulation duct 105.

[0054] In this embodiment, the detection mechanism further includes a first drive component, which includes a first motor 401, a first gear 303, and a plurality of second gears 304.

[0055] An installation channel 112 is provided inside the outer casing 100. The installation channel 112 is located below the air inlet channel 111. The installation channel 112 and the air inlet channel 111 are separated by a partition fixedly installed inside the outer casing 100. The partition is horizontally arranged. The first gear 303 and the second gear 304 are both rotatably arranged in the installation channel 112, and the axes of the first gear 303 and the second gear 304 are both vertically arranged.

[0056] The first gear 303 is located in the middle of the storage box 102. Multiple second gears 304 are sequentially distributed along the circumference of the first gear 303, and the second gears 304 mesh with the first gear 303. A first motor 401 is fixedly installed within the mounting channel 112, and the output shaft of the first motor 401 is fixedly connected to the middle of the first gear 303. A rotating shaft 320 is fixedly installed in the middle of each placement rack 103. The rotating shaft 320 is vertically arranged, and each rotating shaft 320 is fixedly connected to a second gear 304.

[0057] The first motor 401 drives multiple second gears 304 to rotate via the first gear 303, which in turn drives a placement rack 103 to rotate via each rotating shaft 320, thereby causing the plate 101 to rotate.

[0058] In this embodiment, the detection mechanism further includes a second drive component, which includes a second motor 402, a rotating ring 301, and a third gear 302.

[0059] Both the rotating ring 301 and the third gear 302 are rotatably mounted within the mounting channel 112, and their axes are both vertically aligned. A gear ring is mounted inside the rotating ring 301, and both the gear ring and the rotating ring 301 are coaxially aligned with the first gear 303. The third gear 302 meshes with the gear ring. The second motor 402 is fixedly mounted within the housing 100, and its output shaft is fixedly connected to the middle of the third gear 302.

[0060] The rotating ring 301 has multiple first arc-shaped grooves 310, which are distributed sequentially along the circumference of the rotating ring 301. One end of each first arc-shaped groove 310 is close to the center of the rotating ring 301, and the other end of each first arc-shaped groove 310 is far away from the center of the rotating ring 301.

[0061] The bottom of the storage box 102 has multiple first sliding grooves 311, which are sequentially distributed along the circumference of the rotating ring 301, and each first sliding groove 311 is arranged radially along the rotating ring 301. The partition has multiple second sliding grooves, each arranged radially along the rotating ring 301, and each second sliding groove corresponds to one first sliding groove 311. Each rotating shaft 320 sequentially passes through one second sliding groove, one first sliding groove 311, and one first arc-shaped sliding groove 310, and is slidably connected to the second sliding groove, the first sliding groove 311, and the first arc-shaped sliding groove 310. The first sliding grooves 311 and the second sliding grooves are used to limit the direction of movement of the rotating shaft 320.

[0062] The rotation of the third gear 302 drives the rotating ring 301 to rotate, and the rotating ring 301 drives the rotating shaft 320 to move closer to or away from the center of the rotating ring 301 through the first arc-shaped slide groove 310.

[0063] In this embodiment, a temporary storage channel 113 is provided inside the outer casing 100, and the temporary storage channel 113 is connected to the storage box 102. A baffle is fixedly installed inside the temporary storage channel 113, and the baffle is horizontally positioned.

[0064] The detection assembly also includes a vertical lead screw 208, a vertical limit shaft 207, a sector gear 305, a fourth gear 307, and a third motor 403. Both the vertical lead screw 208 and the vertical limit shaft 207 are vertically arranged. The vertical lead screw 208 is rotatably mounted within the temporary storage channel 113 and rotatably mounted on a baffle. A sliding block 410 is provided at one end of the horizontal lead screw 202. The sliding block 410 is slidably mounted on the vertical lead screw 208 and the vertical limit shaft 207, and the sliding block 410 and the vertical lead screw 208 are in helical drive engagement.

[0065] The sector gear 305 and the lead screw 208 are coaxially arranged, and the sector gear 305 can rotate relative to the lead screw 208. The vertical limiting shaft 207 is fixedly arranged on the sector gear 305. A second arc-shaped slide groove 312 is provided on the baffle, the second arc-shaped slide groove 312 and the lead screw 208 are coaxially arranged, and the vertical limiting shaft 207 is slidably arranged in the second arc-shaped slide groove 312. The third motor 403 is fixedly arranged in the housing 100, and the fourth gear 307 is fixedly arranged on the output shaft of the third motor 403, and the fourth gear 307 meshes with the sector gear 305.

[0066] During the release phase, the lead screw 202 is located within the temporary storage channel 113. When switching from the release phase to the detection phase, the third motor 403 drives the fourth gear 307 to rotate, the fourth gear 307 drives the sector gear 305 to rotate, the sector gear 305 rotates, and the vertical limit shaft 207 rotates. The vertical limit shaft 207 moves the lead screw 202 from the temporary storage channel 113 to the storage box 102 via the sliding block 410.

[0067] In this embodiment, the detection component also includes a fourth motor 404, which is fixedly disposed inside the housing 100, and the output shaft of the fourth motor 404 is fixedly connected to the lead screw 208.

[0068] In this embodiment, the detection mechanism further includes a fifth motor 405 and a horizontal limiting rod 203. The horizontal limiting rod 203 is fixedly mounted on the sliding block 410. The horizontal limiting rod 203 and the horizontal lead screw 202 are arranged in parallel. The gas sampling head 201 and the horizontal limiting rod 203 are slidably connected, and the horizontal limiting rod 203 is used to limit the rotation of the gas sampling head 201. The gas sampling head 201 and the horizontal lead screw 202 are screw-driven. The horizontal lead screw 202 and the sliding block 410 are rotatably connected. The fifth motor 405 is fixedly mounted on the sliding block 410, and the output shaft of the fifth motor 405 is fixedly connected to the horizontal lead screw 202.

[0069] In this embodiment, the vertical lead screw 208 is located diagonally opposite the storage box 102. A horizontal through groove is provided on the upper side of the storage box 102, which is connected to the temporary storage channel 113. During the process of the horizontal lead screw 202 rotating from the temporary storage channel 113 to the storage box 102, the horizontal lead screw 202 passes through the horizontal through groove. A vertical through groove is provided at the diagonal position of the storage box 102 and the vertical lead screw 208, which is connected to the temporary storage channel 113. The horizontal lead screw 202 slides within the vertical through groove when sliding up and down. A sealing curtain 209 is provided at both the horizontal and vertical through grooves. The sealing curtain 209 is made of elastic rubber material, which deforms and fits when the horizontal lead screw 202 passes through it, and closes the horizontal or vertical through groove when stationary.

[0070] In this embodiment, the detection assembly also includes a detection box 206 and an air pipe 210. The detection box 206 is fixedly installed inside the outer shell 100. The air pipe 210 connects the detection box 206 and the gas sampling head 201. An air pump is installed inside the detection box 206 to absorb the gas in the storage box 102 through the gas sampling head 201.

[0071] Working process: Each board 101 is placed on a rack 103. The detection mechanism is initially in the release phase, and in the initial state, the first side of the board 101 is located at the center of the storage box 102, while the second side of the board 101 is away from the center of the storage box 102. At this time, a detection space is formed between two adjacent boards 101, and each gas supply component is in a detection space, accelerating the release of formaldehyde from the first detection surface of one board 101 and the second detection surface of the other board 101.

[0072] Simultaneously, the first fan 104 and the second fan 106 are activated. The first fan 104 blows the gas in the air inlet channel 111 into the storage box 102, and the second fan 106 draws the gas in the storage box 102 into the air outlet channel 110. The gas circulates along the air inlet channel 111, the storage box 102, the air outlet channel 110, and the circulating air duct 105. The airflow in the storage box 102 moves from bottom to top. The first fan 104 and the second fan 106 provide airflow to the storage box 102, thereby accelerating the release of formaldehyde from the board 101.

[0073] After the board 101 has been left to stand for a preset time, the first motor 401 is driven, which in turn drives the first gear 303 to rotate, thereby driving multiple second gears 304 to rotate. Each second gear 304 drives the placement rack 103 and the board 101 to rotate via a rotating shaft 320.

[0074] As the plate 101 rotates, the interconnected area of ​​adjacent detection spaces increases, facilitating the mixing of gases within the storage box 102. After the plate 101 rotates 90°, each gas supply component aligns with the first side of one plate 101 and the second side of the other plate 101. Each gas supply component accelerates the release of formaldehyde from the first side of one plate 101 and the second side of the other plate 101. By altering the alignment of the plates 101 with the gas supply components, the distribution of formaldehyde in each detection space becomes more uniform.

[0075] Finally, the drive rack 103 rotates the plate 101 to a position perpendicular to its initial state. The second motor 402 is then activated, driving the third gear 302 to rotate, which in turn drives the rotating ring 301.

[0076] like Figure 8 From the perspective shown, when the rotating ring 301 rotates clockwise, it drives the rotating shaft 320 to move gradually closer to the axis of the rotating ring 301 via the first arc-shaped slide groove 310. When the rotating ring 301 rotates counterclockwise, it drives the rotating shaft 320 to move gradually away from the axis of the rotating ring 301 via the first arc-shaped slide groove 310.

[0077] Therefore, at this time, the rotating ring 301 rotates counterclockwise, and the rotating shaft 320 moves in a direction that gradually moves away from the axis of the rotating ring 301. Under the limit of the first slide groove 311 and the second slide groove, the multiple rotating shafts 320 drive the multiple plates 101 to move away from each other, thereby avoiding interference with the subsequent up and down sliding of the cross screw 202 in the storage box 102.

[0078] Next, the testing phase begins. Initially, the sliding block 410 is positioned above the vertical lead screw 208. The third motor 403 is activated, driving the fourth gear 307 to rotate, which in turn drives the sector gear 305 to rotate relative to the vertical lead screw 208. The sector gear 305 drives the vertical limit shaft 207 to move, which in turn drives the horizontal lead screw 202 to move via the sliding block 410. The horizontal lead screw 202 is then moved through the horizontal slot and into the storage box 102 from the temporary storage channel 113.

[0079] Next, the fourth motor 404 is activated, driving the vertical lead screw 208 to rotate. The relative rotation of the vertical lead screw 208 and the sliding block 410 causes the sliding block 410 and the horizontal lead screw 202 to move downwards to the bottom of the storage tank 102. Then, the fourth motor 404 is activated again, causing the horizontal lead screw 202 to move upwards. During this upward movement, the gas sampling head 201 activates the air pump, causing it to begin absorbing gas from the storage tank 102. The upward speed of the horizontal lead screw 202 is the same as the airflow speed, ensuring stable airflow in the area where the gas sampling head 201 is located, thus minimizing interference from the airflow within the storage tank 102 on the gas sampling head 201. The gas absorbed by the gas sampling head 201 is stored in the detection tank 206. After sampling is complete, the gas in the detection tank 206 is removed and tested.

[0080] At the start of each testing run, the gas sampling head 201 is moved to the bottom of the storage tank 102. Since the gas inside the storage tank 102 circulates, the gas reaching the bottom of the storage tank 102 may differ each time. When it is necessary to test gas at different locations, the fifth motor 405 is activated. The fifth motor 405 drives the lead screw 202 to rotate, changing the relative position of the gas sampling head 201 and the lead screw 202, thus increasing the number of sampling positions of the gas sampling head 201 and improving the testing accuracy.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A furniture formaldehyde detection device for detecting formaldehyde on a board, characterized in that: it comprises a shell and a detection mechanism, a storage box is arranged in the shell; the detection mechanism comprises a detection assembly, four placing racks and four air supply assemblies; the air supply assemblies are arranged in the storage box, and the four air supply assemblies are sequentially distributed along the circumference of the storage box; the placing racks are rotationally arranged in the storage box, and each placing rack is between two adjacent air supply assemblies along the circumference of the storage box; one board is arranged on each placing rack, and the board is vertically arranged; the air supply assemblies are configured to generate a circulating air flow from bottom to top in the storage box to accelerate the release of formaldehyde from adjacent boards; the detection assembly comprises a horizontal screw rod and a gas sampling head; the horizontal screw rod is horizontally arranged and can vertically slide as a whole; the gas sampling head is slidably arranged on the horizontal screw rod, and the gas sampling head samples the gas in the storage box; the detection mechanism comprises a release phase and a detection phase; in the release phase, after the board is stationary for a preset time, the board is rotated, the board to be detected corresponding to the air supply assembly is switched, so that the formaldehyde in the storage box is more uniformly distributed; in the detection phase, the gas sampling head starts to sample the gas, the horizontal screw rod moves upward from the bottom of the storage box, and the flow rate of the air flow provided by the air supply assembly is the same, so as to reduce the interference of the air flow in the storage box on the sampling of the gas sampling head; four vertical surfaces of the board are a first side, a second side, a third side and a fourth side, respectively; the first side is parallel to the second side, the third side is parallel to the fourth side, the third side is a first detection surface, the fourth side is a second detection surface, and the first detection surface and the second detection surface are the two largest planes on the board; in the initial state of the release phase, the first side of the board is located at the center of the storage box, and the second side of the board is away from the center of the storage box; at this time, a detection space is formed between the adjacent two boards, each air supply assembly is in a detection space, and the release of formaldehyde on the first detection surface of one of the boards and the second detection surface of the other board is accelerated; after the board is rotated by 90°, each air supply assembly accelerates the release of formaldehyde on the first side of one of the boards and the second side of the other board; the detection mechanism comprises a first driving assembly, the first driving assembly comprises a first motor, a first gear and a plurality of second gears; the first gear and the second gears are rotationally arranged in the shell, and the axes of the first gear and the second gears are vertically arranged; the first gear is located in the middle of the storage box, the plurality of second gears are sequentially distributed along the circumference of the first gear, and the second gears are engaged with the first gear; the first motor is fixedly arranged in the shell, and the output shaft of the first motor is fixedly connected with the first gear; a shaft is fixedly arranged in the middle of each placing rack, and the shaft is vertically arranged; each shaft is fixedly connected with a second gear; the first motor drives the plurality of second gears to rotate through the first gear, and then drives a placing rack to rotate through each shaft, so as to drive the board to rotate. ​ ​ ​ ​ ​ The detection mechanism further comprises a second driving assembly, the second driving assembly comprising a second motor, a rotating ring and a third gear; the rotating ring and the third gear are both rotationally arranged in the shell, and the axes of the rotating ring and the third gear are both vertically arranged; a gear ring is arranged on the inner side of the rotating ring, and the gear ring and the rotating ring are coaxially arranged with the first gear; the third gear is engaged with the gear ring; the second motor is fixedly arranged in the shell, and the output shaft of the second motor is fixedly connected with the third gear; A plurality of first arc-shaped sliding grooves are formed on the rotating ring, and the first arc-shaped sliding grooves are sequentially distributed along the circumference of the rotating ring; one end of each first arc-shaped sliding groove is close to the center of the rotating ring, and the other end of each first arc-shaped sliding groove is away from the center of the rotating ring; each rotating shaft is slidingly arranged in a first arc-shaped sliding groove; the rotating ring is driven to rotate by the third gear, and the rotating ring drives the rotating shaft to move close to or away from the center of the rotating ring through the first arc-shaped sliding groove.

2. The furniture formaldehyde detection device according to claim 1, wherein: an air outlet channel, an air inlet channel and a circulating air duct are formed in the shell; the air outlet channel is located on the upper side of the storage box, and the air inlet channel is located on the lower side of the storage box; the circulating air duct is in communication with the air outlet channel and the air inlet channel; each gas supply assembly comprises a first fan and a second fan; the first fan is fixedly arranged on the bottom of the storage box and is used for blowing the gas in the air inlet channel into the storage box; the second fan is fixedly arranged on the top of the storage box and is used for sucking the gas in the storage box into the air outlet channel; the gas flows in the air inlet channel, the storage box, the air outlet channel and the circulating air duct in a circulating manner.

3. The furniture formaldehyde detection device according to claim 1, wherein: a temporary storage channel is formed in the shell, and the temporary storage channel is in communication with the storage box; the detection assembly further comprises a vertical screw rod, a vertical limiting shaft, a sector gear, a fourth gear and a third motor; the vertical screw rod and the vertical limiting shaft are both vertically arranged, and the vertical screw rod is rotationally arranged in the temporary storage channel; one end of the horizontal screw rod is provided with a sliding block, the sliding block is slidingly arranged on the vertical screw rod and the vertical limiting shaft, and the sliding block and the vertical screw rod are in screw transmission cooperation; the sector gear is coaxially arranged with the vertical screw rod, and the sector gear can rotate relative to the vertical screw rod; the vertical limiting shaft is fixedly arranged on the sector gear; the third motor is fixedly arranged in the shell, the fourth gear is fixedly arranged on the output shaft of the third motor, and the fourth gear is engaged with the sector gear; in the releasing stage, the horizontal screw rod is located in the temporary storage channel; when switching from the releasing stage to the detection stage, the third motor drives the fourth gear to rotate, the fourth gear drives the sector gear to rotate, the sector gear drives the vertical limiting shaft to rotate, and the vertical limiting shaft drives the horizontal screw rod to move from the temporary storage channel to the storage box through the sliding block.

4. The furniture formaldehyde detection device according to claim 3, wherein: the detection assembly further comprises a fourth motor, the fourth motor is fixedly arranged in the shell, and the output shaft of the fourth motor is fixedly connected with the vertical screw rod.

5. The furniture formaldehyde detection device according to claim 3, wherein: The detection mechanism further comprises a fifth motor and a horizontal limiting rod; the horizontal limiting rod is fixedly arranged on the sliding block; the horizontal limiting rod and the horizontal screw rod are arranged in parallel; the gas sampling head and the horizontal limiting rod are slidingly connected; the gas sampling head and the horizontal screw rod are screw transmission matched; the horizontal screw rod and the sliding block are rotationally connected; the fifth motor is fixedly arranged on the sliding block, and an output shaft of the fifth motor is fixedly connected with the horizontal screw rod.

6. The furniture formaldehyde detection device according to claim 3, characterized in that: The vertical screw rod is located at the diagonal position of the storage box; the upper side of the storage box is provided with a horizontal through groove, and the horizontal through groove and the temporary storage channel are communicated; the horizontal screw rod passes through the horizontal through groove in the process of rotating from the temporary storage channel to the storage box; the diagonal position close to the storage box and the vertical screw rod is provided with a vertical through groove, and the vertical through groove and the temporary storage channel are communicated; the horizontal screw rod slides in the vertical through groove when sliding up and down; the horizontal through groove and the vertical through groove are both provided with a sealing curtain, the sealing curtain is made of elastic rubber material, and the horizontal screw rod is deformed and fitted when passing through, and the sealing curtain closes the horizontal through groove or the vertical through groove when being static.

7. The furniture formaldehyde detection device according to claim 1, characterized in that: The detection assembly further comprises a detection box and a gas pipe, the detection box is fixedly arranged in the shell, the gas pipe is connected with the detection box and the gas sampling head, and the detection box is provided with a gas pump for absorbing the gas in the storage box through the gas sampling head.

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