Air detector

Abstract

The utility model discloses an air detection machine, and relates to the technical field of building indoor air detection equipment, the air detection machine comprises a shell, two sides of the shell are provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is inserted into the shell and is connected with an extension mechanism, and the extension mechanism is discontinuously communicated with a second connecting pipe through an adjusting plate; a filter screen is arranged in the second connecting pipe, the filter screen is used for filtering air entering the second connecting pipe, a part of the second connecting pipe is cut off under the filter screen to form a gap, a storage box is arranged under the gap, and the adjusting plate is used for adjusting the extending mechanism to be discontinuously communicated with the second connecting pipe. Impurities attached to the filter screen are scraped off and enter the storage box through the gap; the other end of the second connecting pipe is communicated with an air cylinder, an air suction and exhaust mechanism is arranged in the air cylinder, and the air suction and exhaust mechanism is used for sucking air guided in through the second connecting pipe and exhausting the air into an air detector for detection.

Description

Technical Field

[0001] This invention relates to the field of indoor air quality testing equipment for buildings, and particularly to an air quality testing machine. Background Technology

[0002] An air quality detector is a device that uses sensors to detect the composition and concentration of gases and inhalable particulate matter in indoor air of a building, and can display the detection values ​​on a screen. For example, Chinese invention patent CN202010037621.2 discloses a building material air quality detection system, which solves the problem that "the equipment may be damaged or the pipes inside the equipment may be blocked due to the inhalation of pollutants such as debris and dust, thus affecting the service life of the entire equipment." However, its technical solution is relatively complex and is prone to failure in actual work, thus affecting the normal use of the entire equipment. Summary of the Invention

[0003] Technical problems to be solved:

[0004] To address the shortcomings of existing technologies, this invention provides an air quality detector that solves the problem described in the background section: the current technical solutions are complex and prone to malfunctions in practical operation, thus affecting the normal use of the entire device.

[0005] Technical solution:

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An air quality detector includes a housing with an air inlet pipe and an air outlet pipe on both sides. The air inlet pipe is inserted into the housing and connected to an extension mechanism. The extension mechanism is intermittently connected to a second connecting pipe via an adjustment plate. A filter screen is provided inside the second connecting pipe to filter the air entering the second connecting pipe. A portion of the second connecting pipe is cut off directly below the filter screen to form a gap. A storage box is located directly below the gap. The adjustment plate is used to adjust the intermittent connection between the extension mechanism and the second connecting pipe, scraping off debris attached to the filter screen and allowing it to enter the storage box through the gap.

[0008] The other end of the second connecting pipe is connected to the cylinder, and the cylinder is equipped with an air intake and exhaust mechanism. The air intake and exhaust mechanism is used to absorb the air introduced through the second connecting pipe and discharge it into the air detector for testing.

[0009] In a possible implementation, the extending mechanism comprises an extending pipe and an adjusting rail, the extending pipe is in communication with the air inlet pipe, the extending pipe has a rectangular cross section and a width greater than that of the air inlet pipe, the adjusting rail is fixedly installed on the top end and the bottom end side of the extending pipe respectively, the adjusting rail has a width greater than that of the extending pipe, the adjusting plate reciprocally slides in the adjusting rail and always seals the extending pipe during the sliding process, the adjusting plate is provided with a cleaning brush close to the side of the second connecting pipe, the cleaning brush sweeps the sundries attached to the filter screen and scrapes the sundries into the storage box through the gap.

[0010] In a possible implementation, the adjusting plate is provided with a ventilation hole, the adjusting plate is provided with a first connecting pipe close to the side of the second connecting pipe, the ventilation hole is in through connection with the first connecting pipe, the ventilation hole and the first connecting pipe are intermittently in communication with the second connecting pipe along with the adjusting plate, the first connecting pipe is provided with a sealing plate corresponding to and matching the gap close to the bottom end of the side of the second connecting pipe, the sealing plate has a width greater than that of the first connecting pipe and slides through the gap; when the first connecting pipe is just in communication with the second connecting pipe, the sealing plate has completely sealed the gap to prevent air leakage; when the first connecting pipe is in communication with the second connecting pipe, the cleaning brush is away from the filter screen, when the first connecting pipe is away from the second connecting pipe, the cleaning brush sweeps the filter screen.

[0011] In a possible implementation, the adjusting plate is provided with a support and a rotating wheel on the top surface and the bottom surface, the support is fixedly installed on the adjusting plate, the rotating wheel is provided with a plurality of rotating wheels and is rotationally connected to the support, and the rotating wheel is rollingly connected in the adjusting rail; the inner wall of the shell is provided with a reciprocating driving mechanism, the reciprocating driving mechanism is connected with the adjusting plate and is used to drive the adjusting plate to reciprocally move along the adjusting rail.

[0012] In a possible implementation, the inner wall of the air cylinder is attached with a sealing layer, and is provided with an air suction hole in communication with the second connecting pipe and an air exhaust hole in communication with the air detector; the air suction and exhaust mechanism comprises an eccentric shaft, a rotating drum, a fixed plate and an extension plate, wherein: the eccentric shaft is rotationally connected in the air cylinder and is away from the air suction hole and close to the air exhaust hole; the rotating drum is sleeved on the eccentric shaft and is used to drive the fixed plate; the fixed plate is provided with a plurality of fixed plates and is uniformly distributed on the side of the rotating drum, and the extension direction of the fixed plate is parallel to the length direction of the rotating drum; the extension plate is slidably connected in the fixed plate and is extended and retracted towards the sealing layer; when the two extension plates pass through the air suction hole, the two extension plates are used to absorb the air introduced through the second connecting pipe; when the two extension plates pass through the air exhaust hole, the two extension plates are used to exhaust air to the air detector.

[0013] In a possible implementation, the fixed plate is provided with an expansion cavity, one end of the expansion plate is inserted into the expansion cavity, and a limiting plate is fixedly connected to the expansion plate, the limiting plate slides along the expansion cavity, the limiting plate is wider than the expansion plate, a spring is arranged between the limiting plate and the inner wall of the expansion cavity, and the limiting plate reciprocatingly compresses the spring.

[0014] In a possible implementation, the end of the expansion plate away from the limiting plate is provided with a rotating cavity, a rotating plate is rotatably connected in the rotating cavity, a sealing sliding plate that is in sliding connection with the sealing layer is fixedly connected to the free end of the rotating plate, and the sealing sliding plate is used for sealing the space formed by any two expansion plates.

[0015] In a possible implementation, the receiving box and the bottom surface of the shell are provided with a foreign matter removing plug, the other end of the air detector is in communication with the gas outlet pipe, the gas outlet pipe is a one-way pipe and is used for discharging the gas detected by the air detector.

[0016] In a possible implementation, the outer surface of the shell is provided with a display screen that is in electrical connection with the air detector, the display screen is used for displaying the gas information detected by the air detector, the side surface of the shell is provided with a maintenance door that is used for maintaining the internal components, and the bottom surface is provided with universal wheels that are used for transferring.

[0017] Beneficial effects:

[0018] During the reciprocating sliding of the adjusting plate, the air vent and the first connecting pipe are intermittently in communication with the second connecting pipe, when the air vent and the first connecting pipe are in communication with the second connecting pipe, the air mixed with the pollutants such as the debris and the dust is introduced into the second connecting pipe, the filter screen in the second connecting pipe filters the to-be-detected gas clean, and the pollutants such as the debris and the dust are attached to the filter screen, so that the cleanliness of the gas introduced into the cylinder is ensured.

[0019] During the reciprocating sliding of the adjusting plate, the cleaning brush sweeps the filter screen along with the reciprocating of the adjusting plate, when the first connecting pipe is in communication with the second connecting pipe, the cleaning brush is away from the filter screen, when the first connecting pipe is away from the second connecting pipe, the cleaning brush sweeps the filter screen, so that, when the air vent and the first connecting pipe are in communication with the second connecting pipe, the pollutants such as the debris and the dust attached to the filter screen are swept clean by the cleaning brush and are introduced into the receiving box, the second connecting pipe can be effectively prevented from being blocked, and the service life of the entire device is prolonged; under the driving of the reciprocating driving mechanism, the adjusting plate drives the cleaning brush to intermittently sweep the filter screen, the structure and principle are simple, faults are not prone to occur, and the normal use of the entire device is not affected.

[0020] The blocking plate can be used to block the gap formed by cutting off part of the second connecting pipe directly below the filter screen, and the width of the blocking plate is also greater than that of the first connecting pipe, so that when the first connecting pipe is just communicated with the second connecting pipe, the blocking plate has already blocked the gap below the filter screen completely, ensuring that when the air to be measured enters the second connecting pipe, it will not overflow from the gap to affect the accuracy of the inspection result, and when the cleaning brush cleans the filter screen, the blocking plate is also separated from the gap, which will not affect the cleaning brush to scrape off the debris, dust and other pollutants attached to the filter screen and enter the storage box. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;

[0022] Figure 2 It is a schematic diagram of the local structure of the present application;

[0023] Figure 3 It is Figure 2 the enlarged view of A in the middle;

[0024] Figure 4 It is a schematic diagram of the local structure of the present application from another perspective;

[0025] Figure 5 It is Figure 4 the enlarged view of B in the middle;

[0026] Figure 6 It is a schematic diagram of the structure of the first connecting pipe and the second connecting pipe in the present application;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the adjusting plate in the present application;

[0028] Figure 8 It is a schematic diagram of the local three-dimensional structure of the second connecting pipe in the present application;

[0029] Figure 9 It is a schematic diagram of the internal structure of the air cylinder in the present application;

[0030] Figure 10 It is a schematic diagram of the local three-dimensional structure of the air suction and exhaust mechanism in the present application;

[0031] Figure 11 It is a schematic diagram of the local structure of the air suction and exhaust mechanism in the present application.

[0032] Figure legend: 1, shell; 11, access door; 12, display screen; 13, universal wheel; 14, storage box; 15, impurity plug; 2, air inlet pipe; 3, air outlet pipe; 4, extension mechanism; 41, extension pipe; 42, adjusting rail; 5, adjusting plate; 51, air hole; 52, first connecting pipe; 53, plugging plate; 54, cleaning brush; 55, bracket; 56, runner; 57, reciprocating drive mechanism; 6, second connecting pipe; 61, filter screen; 7, air cylinder; 71, sealing layer; 72, air suction hole; 73, air exhaust hole; 8, air suction and exhaust mechanism; 81, eccentric shaft; 82, rotating drum; 83, fixed plate; 84, telescopic plate; 85, rotating plate; 86, sealing slide plate; 87, telescopic cavity; 88, limiting plate; 89, spring; 9, air detector. DETAILED DESCRIPTION

[0033] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without one or more of these details. In other instances, well-known technical features have not been described in detail in order to avoid obscuring the present application.

[0034] An air detection machine, please refer to Figures 1-11 When detecting household building materials, first, air mixed with pollutants such as debris and dust will enter the extension pipe 41 through the air inlet pipe 2. Since the width of the extension pipe 41 is greater than that of the air inlet pipe 2, the pressure and flow rate of the air will decrease after entering the extension pipe 41. Then, the adjusting plate 5 at the other end of the extension pipe 41 slides back and forth along the adjusting rail 42 under the drive of the reciprocating drive mechanism 57. The reciprocating drive mechanism 57 can adopt a combination of a motor and an eccentric wheel, or a punch press. The width of the adjusting rail 42 is greater than that of the extension pipe 41, and at the same time, the width of the adjusting plate 5 is extended, so that the adjusting plate 5 always seals the extension pipe 41 during the reciprocating sliding process, and the air in the extension pipe 41 will not overflow to affect the accuracy of the test results.

[0035] During the reciprocating sliding process of the adjusting plate 5, the air hole 51 and the first connecting pipe 52 intermittently communicate with the second connecting pipe 6. When the air hole 51 and the first connecting pipe 52 communicate with the second connecting pipe 6, air mixed with pollutants such as debris and dust will enter the second connecting pipe 6. Since the second connecting pipe 6 is provided with a filter screen 61, the filter screen 61 will filter the test gas clean, and at the same time, the pollutants such as debris and dust will adhere to the filter screen 61, ensuring the cleanliness of the gas entering the air cylinder 7.

[0036] The adjusting plate 5 reciprocates, and the cleaning brush 54 sweeps the filter screen 61 along with the reciprocation of the adjusting plate 5. When the first connecting pipe 52 is in communication with the second connecting pipe 6, the cleaning brush 54 is away from the filter screen 61. When the first connecting pipe 52 is away from the second connecting pipe 6, the cleaning brush 54 sweeps the filter screen 61. Therefore, when the air hole 51 and the first connecting pipe 52 are in communication with the second connecting pipe 6, the cleaning brush 54 has swept away the pollutants such as the debris and dust attached to the filter screen 61 and into the storage box 14, which can effectively prevent the second connecting pipe 6 from being blocked and prolong the service life of the whole device. Under the driving of the reciprocating driving mechanism 57, the adjusting plate 5 drives the cleaning brush 54 to sweep the filter screen 61 intermittently. The structure and principle are simple and not prone to failure, which will not affect the normal use of the whole device.

[0037] The blocking plate 53 can be used to block the gap formed by cutting off part of the second connecting pipe 6 directly below the filter screen 61. The width of the blocking plate 53 is also greater than that of the first connecting pipe 52. When the first connecting pipe 52 is in communication with the second connecting pipe 6, the blocking plate 53 has already blocked the gap below the filter screen 61, which ensures that the air to be measured will not overflow from the gap and affect the accuracy of the inspection result. When the cleaning brush 54 cleans the filter screen 61, the blocking plate 53 is separated from the gap, which will not affect the cleaning brush 54 to scrape off the pollutants such as the debris and dust attached to the filter screen 61 and into the storage box 14.

[0038] Then, the clean gas filtered by the filter screen 61 enters the air cylinder 7 through the air suction hole 72. The eccentric shaft 81 rotates under the driving of the power mechanism. The eccentric shaft 81 drives the fixed plates 83 to rotate through the rotating drum 82. The fixed plates 83 then drive the expansion plates 84 to rotate. The gas entering the air cylinder 7 will enter the space formed by any two groups of expansion plates 84 and fixed plates 83 and move to the side of the air exhaust hole 73 along with the rotation of the two groups of expansion plates 84 and fixed plates 83. Since the eccentric shaft 81 is away from the air suction hole 72 and close to the air exhaust hole 73, the expansion plates 84 near the air suction hole 72 are longer than those near the air exhaust hole 73. Therefore, the space formed by any two groups of expansion plates 84 and fixed plates 83 near the air suction hole 72 is larger than that near the air exhaust hole 73. Then, the gas pressure in the space formed by any two groups of expansion plates 84 and fixed plates 83 gradually increases. When it rotates to the side of the air exhaust hole 73, the gas in the space formed by any two groups of expansion plates 84 and fixed plates 83 will quickly pass through the air exhaust hole 73 and be discharged into the air detector 9 for detection. The detection result is displayed on the display screen 12. Finally, the detected gas is discharged through the air outlet pipe 3. The air outlet pipe 3 is a one-way pipe, which can prevent the gas from flowing back and affecting the accuracy of the detection result of the air detector 9.

[0039] The setting of the spring 89 can facilitate the adjustment of the telescopic length of the telescopic plate 84, so that the length near the air inlet hole 72 is greater than that near the air outlet hole 73, and the telescopic length can be flexibly changed along with the curvature of the sealing layer 71; the setting of the limiting plate 88 can prevent the telescopic plate 84 from extending out of the fixed plate 83, and the limiting plate 88 plays a limiting role on the telescopic plate 84; when the telescopic plate 84 rotates to the air inlet hole 72, it is just at the maximum extension position, and the limiting plate 88 moves to the maximum position, which can ensure that the telescopic plate 84 can still rotate after passing through the air inlet hole 72 by abutting against the sealing slide plate 86 to the sealing layer 71.

[0040] The rotation of the sealing slide plate 86 along the end of the telescopic plate 84 through the rotating plate 85 can make the sealing slide plate 86 form a seal with the sealing layer 71 at any position, prevent the gas in the space formed by any two groups of telescopic plates 84 and fixed plates 83 from leaking, and thus cause the gas pressure to decrease and affect the subsequent discharge of the gas to be detected into the air detector 9.

[0041] The setting of the adjusting rails 42 fixedly installed on the top and bottom sides of the extension pipe 41 can make the adjusting plate 5 stably reciprocate and slide without jamming.

[0042] Since the extension pipe 41 has a rectangular cross section and the adjusting plate 5 always seals the extension pipe 41 during reciprocating sliding, the adjusting plate 5 is also a rectangular panel; the supports 55 and rotating wheels 56 on the top and bottom surfaces of the adjusting plate 5 can effectively reduce the resistance of the adjusting plate 5 during reciprocating sliding, so that the adjusting plate 5 can smoothly reciprocate along the adjusting rails 42.

[0043] The sealing layer 71 attached to the inner wall of the cylinder 7 can prevent gas leakage.

[0044] The fixed plate 83 is provided with a plurality of fixed plates 83 uniformly distributed on the side surface of the rotating drum 82, and the extension direction of the fixed plate 83 is parallel to the length direction of the rotating drum 82, so that any two groups of telescopic plates 84 and fixed plates 83 can form a sealed space.

[0045] The setting of the maintenance door 11 can facilitate the maintenance of the components in the housing 1, the setting of the universal wheel 13 can facilitate the movement of the device, and the setting of the impurity plug 15 can facilitate the discharge of the pollutants such as debris and dust collected in the storage box 14.

[0046] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the present application, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An air detection machine comprising a housing (1), the housing (1) is provided with an air inlet pipe (2) and an air outlet pipe (3) on both sides, characterized in that: The air inlet pipe (2) is inserted into the shell (1) and connected with the extension mechanism (4), the extension mechanism (4) is intermittently communicated with the second connecting pipe (6) through the adjusting plate (5), the second connecting pipe (6) is provided with a filter screen (61), the filter screen (61) is used for filtering the air entering the second connecting pipe (6), the filter screen (61) is directly below the second connecting pipe (6) and is cut off to form an air gap, the air gap is directly below the receiving box (14), the adjusting plate (5) is used for adjusting the intermittent communication between the extension mechanism (4) and the second connecting pipe (6), the dirt attached to the filter screen (61) is scraped off and enters the receiving box (14) through the air gap. The other end of the second connecting pipe (6) is communicated with the air cylinder (7), the air cylinder (7) is provided with an air suction and exhaust mechanism (8), the air suction and exhaust mechanism (8) is used for absorbing the air introduced through the second connecting pipe (6) and discharging into the air detector (9) for detection.

2. The air detection machine of claim 1, wherein: The extension mechanism (4) comprises an extension pipe (41) and an adjusting rail (42), the extension pipe (41) is communicated with the air inlet pipe (2), the extension pipe (41) is rectangular in transverse section and has a width greater than that of the air inlet pipe (2), the adjusting rail (42) is fixedly installed on the top end and the bottom end side of the extension pipe (41) respectively, the adjusting rail (42) has a width greater than that of the extension pipe (41), the adjusting plate (5) reciprocally slides in the adjusting rail (42) and always seals the extension pipe (41) during the sliding process, the side of the adjusting plate (5) close to the second connecting pipe (6) is provided with a cleaning brush (54), the cleaning brush (54) sweeps the dirt attached to the filter screen (61) along with the reciprocating of the adjusting plate (5) and scrapes off the dirt to enter the receiving box (14) through the air gap.

3. The air detection machine of claim 2, wherein: The adjusting plate (5) is provided with a ventilation hole (51) and a first connecting pipe (52) close to the second connecting pipe (6), the ventilation hole (51) and the first connecting pipe (52) are throughly connected, the ventilation hole (51) and the first connecting pipe (52) are intermittently communicated with the second connecting pipe (6) along with the adjusting plate (5), the side of the first connecting pipe (52) close to the bottom end of the second connecting pipe (6) is provided with a blocking plate (53) corresponding to and matching the air gap, the blocking plate (53) has a width greater than that of the first connecting pipe (52) and slides through the air gap; When the first connecting pipe (52) is just communicated with the second connecting pipe (6), the blocking plate (53) has completely blocked the air gap to prevent air leakage; When the first connecting pipe (52) is communicated with the second connecting pipe (6), the cleaning brush (54) is away from the filter screen (61), when the first connecting pipe (52) is away from the second connecting pipe (6), the cleaning brush (54) sweeps the filter screen (61).

4. The air detection machine of claim 3, wherein: The top surface and the bottom surface of the adjusting plate (5) are provided with supports (55) and rotating wheels (56), the supports (55) are fixedly installed on the adjusting plate (5), the rotating wheels (56) are rotatably connected to the supports (55), and the rotating wheels (56) are rollingly connected in the adjusting rail (42); The inner wall of the shell (1) is provided with a reciprocating driving mechanism (57), the reciprocating driving mechanism (57) is connected with the adjusting plate (5), and is used for driving the adjusting plate (5) to reciprocate along the adjusting rail (42).

5. The air detection machine of claim 4, wherein: The inner wall of the air cylinder (7) is attached with a sealing layer (71), and is provided with an air suction hole (72) communicated with the second connecting pipe (6) and an air exhaust hole (73) communicated with the air detector (9); The air suction and exhaust mechanism (8) comprises an eccentric shaft (81), a rotating drum (82), a fixed plate (83) and an expansion plate (84), wherein: The eccentric shaft (81) is rotatably connected in the air cylinder (7) and is away from the air suction hole (72) and close to the air exhaust hole (73); The rotating drum (82) is sleeved on the eccentric shaft (81) and is used for driving the fixed plate (83); The fixed plate (83) is provided with a plurality of fixed plates (83) and is uniformly distributed on the side surface of the rotating drum (82), and the extension direction of the fixed plate (83) is parallel to the length direction of the rotating drum (82); The expansion plate (84) is slidably connected in the fixed plate (83) and is expanded or contracted towards the sealing layer (71); When the two expansion plates (84) rotate through the air suction hole (72), the air introduced through the second connecting pipe (6) is absorbed, and when the two expansion plates (84) rotate through the air exhaust hole (73), the air is exhausted to the air detector (9).

6. The air detection machine of claim 5, wherein: The fixed plate (83) is provided with an expansion cavity (87), one end of the expansion plate (84) is inserted into the expansion cavity (87), and a limiting plate (88) is fixedly connected, the limiting plate (88) slides along the expansion cavity (87), the width of the limiting plate (88) is greater than that of the expansion plate (84), a spring (89) is arranged between the limiting plate (88) and the inner wall of the expansion cavity (87), and the limiting plate (88) reciprocatingly compresses the spring (89).

7. The air detection machine of claim 6, wherein: The end of the expansion plate (84) away from the limiting plate (88) is provided with a rotating cavity, a rotating plate (85) is rotatably connected in the rotating cavity, a sealing sliding plate (86) is fixedly connected to the free end of the rotating plate (85) and is slidably connected with the sealing layer (71), and the sealing sliding plate (86) is used for sealing the space formed by any two expansion plates (84).

8. The air detection machine of claim 7, wherein: The bottom surface of the storage box (14) and the shell (1) is provided with a foreign matter removing plug (15), the other end of the air detector (9) is communicated with the air outlet pipe (3), the air outlet pipe (3) is a one-way pipe and is used for exhausting the gas detected by the air detector (9).

9. The air detection machine of claim 8, wherein: The outer surface of the shell (1) is provided with a display screen (12) electrically connected with the air detector (9), the display screen (12) is used for displaying the gas information detected by the air detector (9), a maintenance door (11) for maintaining the internal components is arranged on the side surface of the shell (1), and universal wheels (13) for transferring are arranged on the bottom surface.

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