Air purification detection device

Abstract

The present invention provides an air purification detection device, comprising a shell, a first fan is fixedly installed on the front side of the shell, and a second fan is fixedly installed on the surface of the shell located at the bottom of the first fan, a ventilation pipe is fixed at the inside of the shell corresponding to the air outlet of the first fan, and an air transfer pipe is fixed at the inside of the shell corresponding to the air outlet of the second fan, the air transfer pipe is connected with the ventilation pipe, and the replaced new graphite plate is kept in contact with the ventilation pipe and the exhaust pipe under the action of a sliding sleeve and a guide rod. Compared with the prior art, the corresponding fan is selected by detecting the dust concentration in the air in advance, which saves electricity and can work efficiently according to specific circumstances. The service life of the graphite plate does not need to be estimated manually, and the purification effect of the graphite plate is determined by detecting the exhaust gas at the tail end of the exhaust pipe. When the effect is poor, a new graphite plate is replaced, which is more timely and convenient than manual replacement.

Description

Technical Field

[0001] The invention relates to the field of air purification detection, and in particular to an air purification detection device. Background Art

[0002] The quality of air will directly affect the quality of people's lives. Research reports show that the disease rate in cities with poor air quality is much higher than in other cities. Therefore, improving air quality is the primary task at present. There are many types of air purifiers on the market. Adsorbing dust in the air through graphite plates is a common way of air purification.

[0003] On the one hand, the existing air purifiers have relatively simple functions and are unable to first detect the air quality and then evolve the air according to the test results. Instead, they simply purify the air continuously. The air quality in different areas is different. If the air is purified by a purifier of the same power alone, a large amount of electricity will be wasted. At the same time, the purification method of the graphite plate will lead to low purification efficiency after long-term use, and the graphite plate needs to be replaced and cleaned regularly. Users cannot determine the time to replace the graphite plate according to the specific usage situation, which will affect the use effect of the purifier. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an air purification detection device to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Through the cooperation of the laser dust meter and the exchange transmission mechanism, the corresponding fan is selected to perform suction air purification according to the detection of the dust content in the air. The two graphite plates are replaced by the driving mechanism, eliminating the inconvenience of manual replacement.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: an air purification detection device, including a shell, a first fan is fixedly installed on the front side of the shell, and a second fan is fixedly installed on the surface of the shell located at the bottom of the first fan, a ventilation pipe is fixed at the inside of the shell corresponding to the air outlet of the first fan, and an air transfer pipe is fixed at the inside of the shell corresponding to the air outlet of the second fan, the air transfer pipe is connected with the ventilation pipe, two groups of upper and lower graphite plates are provided at the outlet port of the ventilation pipe inside the shell corresponding to the ventilation pipe, and an exhaust pipe is provided on the back side of the shell corresponding to the side of the graphite plate away from the ventilation pipe, a driving mechanism for driving the two groups of graphite plates to rise and fall and exchange positions is provided on the side of the shell corresponding to the two groups of graphite plates, and an exchange transmission mechanism is provided on the front side of the shell between the first fan and the second fan.

[0006] Furthermore, the exchange transmission mechanism includes a mounting frame, which is slidably inserted on the surface of the front side of the shell between the first fan and the second fan, and a second motor is fixedly installed inside the mounting frame, a first transmission wheel is slidably sleeved on the surface of the output end of the second motor, one side of the first transmission wheel is rotatably connected to the second transmission wheel through a bearing, and the second transmission wheel is rotatably installed on the outer wall of the air transfer tube away from the first transmission wheel through a bearing, two clamping blocks are symmetrically fixed on the surface of the output end of the second motor, and two clamping grooves of the same size are provided on the inner walls at the same position of the first transmission wheel and the second transmission wheel, the clamping blocks and the clamping grooves are slidably engaged, two electric push rods are fixedly installed on the outer wall of the shell corresponding to the installation position of the mounting frame, and ear plates are fixed on both sides of the mounting frame, and the extended ends of the electric push rods are fixedly connected to the ear plates of the mounting frame.

[0007] Furthermore, a first driven wheel is fixedly sleeved on the surface of the first transmission wheel at a driving shaft of the first fan, and a second driven wheel is fixedly sleeved on the surface of the second transmission wheel at a driving shaft of the second fan, and the first transmission wheel and the first driven wheel, and the second transmission wheel and the second driven wheel are all connected by belt drive.

[0008] Furthermore, the driving mechanism includes gears, and the two graphite plates are arranged in an upper and lower interval. A gear is rotatably installed at the center of the interval of the graphite plates inside the shell through a bearing. A first motor is fixedly installed at the position of the gear on the outer wall of the shell, and the output end of the first motor is fixedly connected to the gear. A rack plate is provided on the same side of the two graphite plates, and the gear is meshed with the rack plates on both sides. A sliding rod is fixed on the outer side of the two rack plates inside the shell, and a connecting sleeve is slidably sleeved on the surface of the sliding rod, and the connecting sleeve is fixed on the outer side of the rack plate.

[0009] Furthermore, two guide rods are fixed along the moving path of the graphite plate on one side of the housing away from the gear, and the guide rods are arranged in an L shape. The graphite plates are fixed with sliding sleeves corresponding to their respective guide rods, and the sliding sleeves are slidably connected to the surfaces of the guide rods.

[0010] Furthermore, a slide groove is provided at a position of the graphite plate corresponding to the connection with the rack plate, and a connecting plate is slidably connected inside the slide groove, and the rack plate is fixed on the connecting plate.

[0011] Furthermore, laser dust monitors are fixedly installed at the four corners of the front side of the shell and at the bottom of the exhaust pipe on the back side, and the detection end of the laser dust monitor at the bottom of the exhaust pipe penetrates into the exhaust pipe.

[0012] Furthermore, the laser dust detector is electrically connected to the electric push rod, the first motor, the second motor, the external power supply and the switch through electric wires.

[0013] Beneficial effects of the present invention: An air purification detection device of the present invention includes a shell; an exhaust pipe; a ventilation pipe; an air transfer pipe; a laser dust monitor; a first fan; a second fan; a driving mechanism; a first motor; a gear; a rack plate; a sliding rod; a connecting sleeve; an exchange transmission mechanism; an electric push rod; a mounting frame; a second motor; a clamping block; a first transmission wheel; a second transmission wheel; a clamping slot; a first driven wheel; a second driven wheel; a graphite plate; a sliding sleeve; a guide rod; a sliding slot; and a connecting plate.

[0014] 1. This air purification detection device uses a dual-fan setting to freely select the fan to be turned on according to the dust content in the air, and achieves different air suction effects through fans of different radii, so that the air purification work can be carried out efficiently and save electricity.

[0015] 2. The air purification detection device switches the fan selection in cooperation with the laser dust monitor under the action of the exchange transmission mechanism, and then transmits kinetic energy, and the first fan and the second fan do not interfere with each other during operation.

[0016] 3. This air purification detection device transmits electrical signals through the laser dust meter at the bottom of the exhaust pipe under the action of the driving mechanism. According to whether the dust content value of the exhaust gas exceeds the standard, it determines whether the graphite plate is invalid, and then freely switches to a new graphite plate. Compared with manual replacement, it is more timely and more convenient to replace.

[0017] 4. In this air purification detection device, under the action of the sliding sleeve and the guide rod, the graphite plate will be offset in position when it is lifted and moved, and the position will be interchanged, so that the pre-stored graphite plate will correspond to the position of the original graphite plate when it is raised to the specified position, and the replaced new graphite plate will be kept in contact with the ventilation pipe and exhaust pipe.

[0018] 5. Compared with the prior art, this air purification detection device detects the dust concentration in the air in advance and selects the corresponding fan, which saves electricity and can work efficiently according to the specific situation. The service life of the graphite plate does not need to be estimated manually. The purification effect of the graphite plate is determined by detecting the exhaust gas at the tail end of the exhaust pipe. When the effect is poor, a new graphite plate is replaced, which is more timely and convenient than manual replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall front structure of an air purification detection device of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall back structure of an air purification detection device of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of a housing of an air purification detection device of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of an exchange transmission mechanism of an air purification detection device of the present invention;

[0023] Figure 5 This is a second schematic diagram of the structure of an exchange transmission mechanism of an air purification detection device of the present invention;

[0024] Figure 6 This is a schematic diagram of the driving mechanism structure of an air purification detection device of the present invention;

[0025] Figure 7 This is one of the schematic diagrams of the side structure of a graphite plate of an air purification detection device of the present invention;

[0026] Figure 8 This is a second schematic diagram of the side structure of a graphite plate of an air purification detection device of the present invention;

[0027] In the figure: 1. shell; 11. exhaust pipe; 12. ventilation pipe; 13. air transfer pipe; 2. laser dust monitor; 3. first fan; 4. second fan; 5. driving mechanism; 51. first motor; 52. gear; 53. rack plate; 54. slide bar; 55. connecting sleeve; 6. exchange transmission mechanism; 61. electric push rod; 62. mounting frame; 63. second motor; 64. clamping block; 65. first transmission wheel; 66. second transmission wheel; 67. clamping slot; 68. first driven wheel; 69. second driven wheel; 7. graphite plate; 71. sliding sleeve; 72. guide rod; 73. slide slot; 74. connecting plate. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] See also Figures 1 to 8The present invention provides a technical solution: an air purification detection device, comprising a shell 1, a first fan 3 is fixedly installed on the front of the shell 1, and a second fan 4 is fixedly installed on the surface of the shell 1 located at the bottom of the first fan 3, a ventilation pipe 12 is fixed at the air outlet of the first fan 3 inside the shell 1, and an air transfer pipe 13 is fixed at the air outlet of the second fan 4 inside the shell 1, and the air transfer pipe 13 is connected with the air pipe 12, and two groups of upper and lower graphite plates 7 are arranged at the outlet port of the air pipe 12 inside the shell 1, and an exhaust pipe 11 is opened on the back of the shell 1 corresponding to the side of the graphite plate 7 away from the air pipe 12, and the two groups of A driving mechanism 5 for lifting and replacing two groups of graphite plates 7 is provided on one side of the graphite plate 7. An exchange transmission mechanism 6 is provided between the first fan 3 and the second fan 4 on the front side of the housing 1. Laser dust monitors 2 are fixedly installed at the four corners of the front side of the housing 1 and at the bottom of the exhaust pipe 11 on the back side. The detection end of the laser dust monitor 2 at the bottom of the exhaust pipe 11 penetrates into the exhaust pipe 11. When the device is working normally, the laser dust monitors 2 on the front and back sides of the housing 1 simultaneously perform air detection (the laser dust monitor 2 is an existing device. While continuously monitoring the dust concentration, it can collect particulate matter so as to analyze its composition. The instrument uses a powerful suction pump to inhale the particulate matter concentration. The detection result (dust concentration value in the air) of the front laser dust monitor 2 is used to control the exchange transmission mechanism 6, and the first fan 3 or the second fan 4 is selected to be turned on (when the dust concentration is high, since the radius of the first fan 3 is twice that of the second fan 4, the first fan 3 is turned on, and the strong suction of the first fan 3 is used to perform efficient air purification. When the dust concentration is low, the second fan 4 is turned on, and the suction effect of the second fan 4 is weaker than that of the first fan 3. The switching selection between the two can be determined according to the size of the dust concentration, thereby achieving efficient air purification and saving electric energy. The air sucked in by the fan enters the interior of the ventilation pipe 12 and is transmitted to The purified air from the graphite plate 7 (the graphite plate 7 has multiple layers with different apertures inside, and particles of different sizes in the air are isolated and purified) attached to the tail end of the ventilation pipe 12 is discharged through the exhaust pipe 11, and then the exhaust gas is monitored by the laser dust monitor 2 at the bottom of the exhaust pipe 11. When the laser dust monitor 2 detects that the dust content in the exhaust gas is still too high, it means that the filtering effect of the graphite plate 7 is gradually failing, and a new graphite plate 7 needs to be replaced. The driving mechanism 5 drives the graphite plate 7 pre-stored at the bottom of the outer shell 1 and the failed graphite plate 7 to exchange positions, and the new graphite plate 7 purifies the air. The staff opens the outer shell 1 and takes out the failed graphite plate 7 for cleaning.

[0030] In this embodiment, the exchange transmission mechanism 6 includes a mounting frame 62, which is slidably inserted on the surface of the front side of the housing 1 between the first fan 3 and the second fan 4, and a second motor 63 is fixedly installed inside the mounting frame 62, a first transmission wheel 65 is slidably sleeved on the surface of the output end of the second motor 63, one side of the first transmission wheel 65 is rotatably connected to the second transmission wheel 66 through a bearing, and the second transmission wheel 66 is rotatably installed on the outer wall of the air transmission tube 13 through a bearing away from the first transmission wheel 65, two clamping blocks 64 are symmetrically fixed on the surface of the output end of the second motor 63, and two clamping grooves 67 of the same size are provided on the inner walls of the first transmission wheel 65 and the second transmission wheel 66 at the same position, and the clamping blocks 64 and the clamping grooves 67 are slidably engaged, two electric push rods 61 are fixedly installed on the outer wall of the housing 1 corresponding to the installation position of the mounting frame 62, and ear plates are fixed on both sides of the mounting frame 62, the extended ends of the electric push rods 61 are fixedly connected to the ear plates of the mounting frame 62, and the driving shaft of the first fan 3 is perpendicular to the first transmission wheel A first driven wheel 68 is fixedly sleeved on the surface of 65, a second driven wheel 69 is fixedly sleeved on the surface of the second fan 4 perpendicular to the second transmission wheel 66, and the first transmission wheel 65 and the first driven wheel 68 and the second transmission wheel 66 and the second driven wheel 69 are connected by belt transmission, and the output end of the second motor 63 is locked with the first transmission wheel 65 and the second transmission wheel 66 through the card block 64. The card slot 67 on the inner wall of the axis of the first transmission wheel 65 and the second transmission wheel 66 is locked for transmission. When the laser dust meter 2 on the front of the housing 1 detects the dust content in the air, The electric push rod 61 pushes the installation frame 62 to slide along the surface of the shell 1, and at the same time, the output end of the motor is inserted into the axis of the first transmission wheel 65 and the second transmission wheel 66. When the block 64 is engaged with the slot 67 inside the first transmission wheel 65, the first fan 3 rotates due to the transmission effect of the belt and the first driven wheel 68, and performs a high-efficiency air suction effect. When the block 64 is engaged with the slot 67 inside the second transmission wheel 66, the second fan 4 rotates due to the transmission effect of the belt and the second driven wheel 69, and performs a normal air suction effect.

[0031] In this embodiment, the driving mechanism 5 includes a gear 52, and the two graphite plates 7 are arranged in an upper and lower interval. The gear 52 is rotatably installed at the center of the interval of the graphite plates 7 in the housing 1 through a bearing. A first motor 51 is fixedly installed at the position of the outer wall of the housing 1 corresponding to the gear 52, and the output end of the first motor 51 is fixedly connected to the gear 52. The same side of the two graphite plates 7 is provided with a rack plate 53, and the gear 52 is meshed with the rack plates 53 on both sides. A slide bar 54 is fixed to the outer side of the two rack plates 53 in the housing 1, and a connection is slidably sleeved on the surface of the slide bar 54. The connecting sleeve 55 is fixed to the outer side of the rack plate 53. Two guide rods 72 are fixed on the side of the housing 1 away from the gear 52 along the moving path of the graphite plate 7, and the guide rods 72 are arranged in an L shape. The graphite plates 7 are fixed with sliding sleeves 71 corresponding to their respective guide rods 72, and the sliding sleeves 71 are slidably sleeved on the surface of the guide rods 72. The graphite plates 7 are provided with sliding grooves 73 at the positions corresponding to the connection of the rack plate 53, and the sliding grooves 73 are slidably connected with connecting plates 74. The rack plate 53 is fixed on the connecting plate 74. The laser dust meter 2 is connected to the electric push rod 61 and the first motor 5 through electric wires. 1. The second motor 63, the external power supply and the switch are electrically connected. The switch is turned on. The external power supply supplies power to the laser dust monitor 2, the electric push rod 61, the first motor 51 and the second motor 63 to work. When the laser dust monitor 2 at the bottom of the exhaust pipe 11 detects that the dust concentration of the discharged gas is still exceeding the standard, the first motor 51 is turned on. The first motor 51 drives the gear 52 to rotate, and the rack plates 53 on both sides of the gear 52 are meshed with it, and move in the vertical direction under the action of the slide bar 54 and the connecting sleeve 55, driving the two upper and lower graphite plates 7 to move in the opposite direction (the failed graphite plate 7 is lowered and stored in the housing 1). Inside, the pre-stored graphite plate 7 is raised and inserted between the tail of the ventilation pipe 12 and the exhaust pipe 11) and under the cooperative guiding action of the guide rod 72 and the sliding sleeve 71 on the other side of the two graphite plates 7, the graphite plates 7 will be offset in position when they are lifted and moved, and the positions are interchanged, so that the pre-stored graphite plates 7 will just correspond to the positions of the original graphite plates 7 when they are raised to the specified position. In the same process, in order to maintain the connectivity between the rack plate 53 and the graphite plate 7, as the graphite plate 7 is laterally offset, the connecting plate 74 slides out along the slide groove 73, and a certain misalignment occurs between the rack plate 53 and the graphite plate 7, but they still remain connected.

[0032] When the device is working normally, the laser dust monitors 2 on the front and back of the shell 1 simultaneously perform air detection. The detection result of the front laser dust monitor 2 controls the exchange transmission mechanism 6, and the electric push rod 61 pushes the installation frame 62 to slide along the surface of the shell 1. At the same time, the output end of the motor is inserted into the axis of the first transmission wheel 65 and the second transmission wheel 66. When the block 64 is engaged with the slot 67 inside the first transmission wheel 65, the first fan 3 rotates due to the transmission effect of the belt and the first driven wheel 68 at this time, and performs a high-efficiency suction effect. When the block 64 is engaged with the slot 67 inside the second transmission wheel 66, the second fan 4 rotates due to the transmission effect of the belt and the second driven wheel 69 at this time, and performs a normal suction effect. The air sucked in by the fan enters the interior of the ventilation pipe 12 and is transmitted to the graphite plate 7 attached to the tail end of the ventilation pipe 12. The purified air is discharged through the exhaust pipe 11, and then according to The laser dust monitor 2 at the bottom of the exhaust pipe 11 monitors the exhaust gas. When the laser dust monitor 2 detects that the dust content of the exhaust gas is still too high, it means that the filtering effect of the graphite plate 7 is gradually failing and a new graphite plate 7 needs to be replaced. The first motor 51 is turned on, and the first motor 51 drives the gear 52 to rotate. The rack plates 53 on both sides of the gear 52 are engaged with it and move in the vertical direction under the action of the slide rod 54 and the connecting sleeve 55, driving the two upper and lower graphite plates 7 to move in the opposite direction. In addition, under the coordinated guiding action of the guide rod 72 and the slide sleeve 71 on the other side of the two graphite plates 7, the graphite plates 7 will be offset in position when they are lifted and moved, and the positions are exchanged, so that the pre-stored graphite plate 7 corresponds to the position of the original graphite plate 7 when it is raised to the specified position, and the new graphite plate 7 purifies the air. The failed graphite plate 7 is taken out and cleaned by the staff after opening the outer shell 1.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air purification detection device, comprising a housing (1), characterized in that: The front side of the housing (1) is fixedly mounted with a first fan (3), and the surface of the housing (1) located at the bottom of the first fan (3) is fixedly mounted with a second fan (4); the interior of the housing (1) is fixedly mounted with a ventilation pipe (12) at a position corresponding to the air outlet of the first fan (3), and the interior of the housing (1) is fixedly mounted with an air transfer pipe (13) at a position corresponding to the air outlet of the second fan (4); the air transfer pipe (13) is connected to the ventilation pipe (12); the interior of the housing (1) is provided with two groups of upper and lower graphite plates (7) at a position corresponding to the outlet port of the ventilation pipe (12), and the back side of the housing (1) is provided with an exhaust pipe (11) at a side of the graphite plate (7) away from the ventilation pipe (12); the housing (1) is provided with a plurality of exhaust pipes (11) and a plurality of exhaust pipes (12) disposed on the side of the graphite plate (7) away from the ventilation pipe (12). 1) A driving mechanism (5) for driving the two groups of graphite plates (7) to rise and fall and change positions is provided on one side of the interior corresponding to the two groups of graphite plates (7); an exchange transmission mechanism (6) is provided on the front of the housing (1) between the first fan (3) and the second fan (4); laser dust monitors (2) are fixedly installed at the four corners of the front of the housing (1) and at the bottom of the exhaust pipe (11) on the back, and the detection end of the laser dust monitor (2) at the bottom of the exhaust pipe (11) penetrates into the exhaust pipe (11); the first fan (3) and the second fan (4) have different radii, and the fan is switched in accordance with the laser dust monitor (2); and the first fan (3) and the second fan (4) do not interfere with each other during operation.

2. An air purification detection device according to claim 1, characterized in that: The exchange transmission mechanism (6) comprises a mounting frame (62), the mounting frame (62) being slidably inserted on a surface of the front side of the housing (1) between the first fan (3) and the second fan (4), and a second motor (63) being fixedly mounted inside the mounting frame (62), a first transmission wheel (65) being slidably sleeved on the surface of the output end of the second motor (63), one side of the first transmission wheel (65) being rotatably connected to a second transmission wheel (66) via a bearing, and a side of the second transmission wheel (66) being rotatably mounted on the transmission wheel (66) away from the first transmission wheel (65) via a bearing. On the outer wall of the tube (13), two clamping blocks (64) are symmetrically fixed on the surface of the output end of the second motor (63), and two clamping grooves (67) of the same size are opened on the inner walls of the first transmission wheel (65) and the second transmission wheel (66) at the same position, and the clamping blocks (64) and the clamping grooves (67) are slidably clamped, and two electric push rods (61) are fixedly installed on the outer wall of the housing (1) corresponding to the installation position of the installation frame (62), and ear plates are fixed on both sides of the installation frame (62), and the extended ends of the electric push rods (61) are fixedly connected to the ear plates of the installation frame (62).

3. An air purification detection device according to claim 2, characterized in that: A first driven wheel (68) is fixedly sleeved on the surface of the driving shaft of the first fan (3) perpendicular to the first transmission wheel (65), and a second driven wheel (69) is fixedly sleeved on the surface of the driving shaft of the second fan (4) perpendicular to the second transmission wheel (66), and the first transmission wheel (65) and the first driven wheel (68) and the second transmission wheel (66) and the second driven wheel (69) are all connected via belt drive.

4. An air purification detection device according to claim 1, characterized in that: The driving mechanism (5) comprises a gear (52), the two graphite plates (7) are arranged at an interval in an upper and lower position, a gear (52) is rotatably mounted on the center of the interval between the graphite plates (7) in the housing (1) via a bearing, a first motor (51) is fixedly mounted on the outer wall of the housing (1) at a position corresponding to the gear (52), and an output end of the first motor (51) is fixedly connected to the gear (52), a rack plate (53) is provided on the same side of the two graphite plates (7), and the gear (52) is meshedly connected to the rack plates (53) on both sides, a sliding rod (54) is fixed on the outer side of the two rack plates (53) in the housing (1), and a connecting sleeve (55) is slidably sleeved on the surface of the sliding rod (54), and the connecting sleeve (55) is fixed to the outer side of the rack plate (53).

5. An air purification detection device according to claim 4, characterized in that: Two guide rods (72) are fixed on a side of the housing (1) away from the gear (52) along the moving path of the graphite plate (7), and the guide rods (72) are arranged in an L shape. The graphite plates (7) are fixed with sliding sleeves (71) corresponding to their respective guide rods (72), and the sliding sleeves (71) are slidably sleeved on the surfaces of the guide rods (72).

6. An air purification detection device according to claim 5, characterized in that: A sliding groove (73) is provided at a position of the graphite plate (7) corresponding to the connection position of the rack plate (53), and a connecting plate (74) is slidably connected inside the sliding groove (73), and the rack plate (53) is fixed on the connecting plate (74).

7. An air purification detection device according to claim 4, characterized in that: The laser dust detector (2) is electrically connected to the electric push rod (61), the first motor (51), the second motor (63), an external power supply and a switch via electric wires.

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