Verification and calibration structure of micro-differential-pressure airflow detection device and working method of verification and calibration structure

Abstract

The invention belongs to the technical field of verification and calibration of micro differential pressure sensors, and discloses a verification and calibration structure of a micro differential pressure airflow detection device and a working method thereof.The verification and calibration structure comprises a box body, a protective cover is installed at the top end of the box body, ventilation filter screens are installed on the two sides of the box body, and a ventilation fan is arranged on one side of one ventilation filter screen; the ventilation fan is installed on the inner wall of the box body, the semiconductor chilling plate is installed on the inner wall of the box body, the control assembly and the cleaning assembly are arranged on the outer wall of the semiconductor chilling plate, the protective cover is made of a transparent visible material such as acrylic or tempered glass, an operator is allowed to observe the verification and calibration process in real time, the box body does not need to be opened frequently, and interference to the environment is reduced. The verification and calibration structure in the box body is protected through the protective cover, external airflow disturbance can be isolated, a stable airflow environment is provided for verification and calibration, and repeatability and accuracy of measurement results are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of verification and calibration of micro-differential pressure sensors, and in particular relates to a verification and calibration structure of a micro-differential pressure airflow detection device and a working method thereof. Background Art

[0002] Micro-pressure differential airflow detection devices are increasingly being used in a variety of fields, including modern industrial production, environmental monitoring, medical equipment, and consumer electronics. These devices effectively monitor airflow velocity, direction, and flow by accurately measuring tiny pressure differences, which is of great significance for ensuring the normal operation of equipment, improving production efficiency, and ensuring environmental safety. However, with the continuous expansion of application areas and the increasing requirements for detection, the verification and calibration of micro-pressure differential airflow detection devices has gradually become prominent, becoming a key factor restricting their performance improvement and application promotion.

[0003] After searching, such as patent: CN222671303U, a micro-pressure differential sensor verification and calibration device includes a micro air pump, a main pipeline is provided at the end of the micro air pump, and the end of the main pipeline away from the micro air pump is connected to two auxiliary pipelines, one of which is equipped with a flow regulating valve for controlling the gas flow, and the end of the other auxiliary pipeline is connected to a U-shaped tube, and the end of the U-shaped tube away from the auxiliary pipeline is connected to a secondary pipeline, and the end of the secondary pipeline is connected to two ventilation tubes, one of which is connected to a joint, and the other is connected to an intelligent standard differential pressure transmitter, and the end of the joint is used to connect to the product to be tested. The utility model has a simple structure, and by controlling the gas outlet flow of the micro cylinder, different water column heights are generated in the U-shaped tube, thereby realizing the generation of pressure difference, and the pressure differential sensor to be tested can be verified and calibrated by a computer. Compared with traditional micro-pressure differential generating devices, it has low cost, low processing difficulty, and is convenient and fast;

[0004] The current verification and calibration structure is set as an open structure. However, due to the temperature changes and airflow disturbances in the calibration environment, the measured airflow will be disturbed, resulting in a deviation between the verification environment and the actual use conditions, which in turn affects the measurement accuracy of the micro-pressure differential airflow detection device. Summary of the Invention

[0005] The object of the present invention is to provide a verification and calibration structure of a micro-pressure differential airflow detection device and a working method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a verification and calibration structure for a micro-pressure differential airflow detection device, comprising a box body, a protective cover installed on the top of the box body, ventilation filters installed on both sides of the box body, a ventilation fan installed on one side of one of the ventilation filters, and the ventilation fan installed on the inner wall of the box body;

[0007] The inner wall of the box is provided with a semiconductor refrigeration sheet, and the outer wall of the semiconductor refrigeration sheet is provided with a control assembly and a cleaning assembly.

[0008] As a further technical scheme of the present application, the control assembly comprises baffles arranged on both sides of the outer wall of the semiconductor refrigeration sheet, and each group of the baffles is threadedly connected with a threaded rod at the bottom, one end of each of the two threaded rods is fixedly provided with a first bevel gear, one side of each of the two first bevel gears is engagedly connected with a second bevel gear, one end of each of the two second bevel gears is fixedly provided with a second rotating shaft, and the two second rotating shafts are respectively arranged at the two ends of a double-shaft motor.

[0009] As a further technical scheme of the present application, the two groups of baffles are arranged alternately.

[0010] As a further technical scheme of the present application, the outer wall of the threaded rod is provided with two threads in opposite directions.

[0011] As a further technical scheme of the present application, the outer wall of the ventilation fan is fixedly provided with a first rotating ring, one side of the first rotating ring is engagedly connected with a first gear, the inner wall of the first gear is fixedly provided with a first rotating shaft, one end of the first rotating shaft away from the first gear is fixedly connected with a second gear, one side of the second gear is engagedly connected with a second rotating ring, the second rotating ring is rotatably arranged on the inner wall of the box, the inner wall of the second rotating ring is fixedly provided with a scraping plate, and the scraping plate is arranged on one side of the ventilation filter screen.

[0012] As a further technical scheme of the present application, the cleaning assembly comprises a scraping strip arranged on the outer wall of the semiconductor refrigeration sheet, the two scraping strips are symmetrically arranged, the top end of each of the two scraping strips is fixedly connected with a moving seat, the inner wall of each of the two moving seats is threadedly connected with a reciprocating screw rod, a fourth rotating shaft is arranged between the two reciprocating screw rods, the outer wall of the fourth rotating shaft is fixedly provided with a third bevel gear, one side of the third bevel gear is engagedly connected with a fourth bevel gear, one end of the fourth bevel gear is fixedly provided with a third rotating shaft, the outer wall of the third rotating shaft is fixedly provided with a third gear, and the third gear is arranged at the top end of the first rotating ring.

[0013] As a further technical scheme of the present application, the outer wall of the reciprocating screw rod is provided with a magnetic block, the outer wall of the magnetic block is provided with a moving block, the bottom end of the moving block is fixedly connected with a guide plate, one side of the guide plate is provided with a connecting rod, and the connecting rod is fixedly arranged at the top end of the baffle.

[0014] As a further technical scheme of the present application, the magnetic block and the moving block are rotatably connected.

[0015] As a further technical scheme of the present application, the moving block is slidingly installed on the inner wall of the box body, and one side of the moving block is provided with a spring.

[0016] A working method of a verification and calibration structure of a micro differential pressure gas flow detection device, comprising the following steps:

[0017] S1: during work, first install the micro differential pressure gas flow detection device into the box body and connect it with the verification and calibration structure, and then cover the protective cover;

[0018] S2: then drive the first rotating ring to rotate through the ventilation fan, the rotation of the first rotating ring drives the rotation of the first gear, the rotation of the first gear drives the rotation of the first rotating shaft, the rotation of the first rotating shaft drives the rotation of the second gear, the rotation of the second gear drives the rotation of the second rotating ring, and the rotation of the second rotating ring drives the rotation of the scraping plate on the surface of the ventilation filter screen, which helps to scrape off the dust attached to the surface of the ventilation filter screen, so as to ensure the ventilation efficiency;

[0019] S3: then, according to the actual temperature inside the box body, drive the second rotating shaft to rotate through the PLC control double-shaft motor, the rotation of the second rotating shaft drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the threaded rod, the rotation of the threaded rod drives the movement of the baffle, so that the two groups of baffles change positions, one group of baffles is in contact with the outer wall of the semiconductor refrigeration piece to open the channel, and the other group of baffles is separated from the outer wall of the semiconductor refrigeration piece to close the channel, so that the gas flows from the hot end or the cold end during work, and refrigeration or heating is performed;

[0020] S4: at the same time, the movement of the baffle drives the movement of the guide plate, the movement of the guide plate drives the movement of the connecting rod, the movement of the connecting rod drives the movement of the moving block, changes the connection state between the third magnetic block inside the moving block and the first magnetic block and the second magnetic block, the third magnetic block on the side of the baffle away from the semiconductor refrigeration piece channel opening is connected with the first magnetic block and the second magnetic block at the same time, the rotation of the fourth rotating shaft drives the rotation of the magnetic block and the reciprocating screw rod, the scraping strip at this position reciprocates to clean the outer wall of the semiconductor refrigeration piece, and the third magnetic block on the side of the baffle close to the semiconductor refrigeration piece channel closing is not connected with the first magnetic block and the second magnetic block, and the scraping strip at this position does not move;

[0021] S5: at the same time, the rotation of the first rotating ring drives the rotation of the third gear, the rotation of the third gear drives the rotation of the third rotating shaft, the rotation of the third rotating shaft drives the rotation of the fourth bevel gear, the rotation of the fourth bevel gear drives the rotation of the third bevel gear, the rotation of the third bevel gear drives the rotation of the reciprocating screw rod, the rotation of the reciprocating screw rod drives the movement of the moving seat, the movement of the moving seat drives the movement of the scraping strip, so that the scraping strip reciprocates on the outer wall of the semiconductor refrigeration piece to wipe the surface thereof;

[0022] S6: After the temperature inside the box is adjusted, the micro-pressure differential airflow detection device is calibrated.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The present invention is configured with a control component. When in operation, the PLC controls the dual-axis motor to start driving the second rotating shaft to rotate. The rotation of the second rotating shaft drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the first bevel gear. The rotation of the first bevel gear drives the rotation of the threaded rod. The rotation of the threaded rod drives the movement of the baffle, so that the two sets of baffles change their positions, which is convenient for cooling or heating the box, and can significantly improve the accuracy, reliability and applicability of verification and calibration.

[0025] 2. The present invention is provided with a cleaning component. When working, the ventilation fan drives the first rotating ring to rotate, the rotation of the first rotating ring drives the rotation of the third gear, the rotation of the third gear drives the rotation of the third rotating shaft, the rotation of the third rotating shaft drives the rotation of the fourth bevel gear, the rotation of the fourth bevel gear drives the rotation of the third bevel gear, the rotation of the third bevel gear drives the rotation of the reciprocating screw, the rotation of the reciprocating screw drives the movement of the movable seat, the movement of the movable seat drives the movement of the scraping strip, so that the scraping strip moves back and forth on the outer wall of the semiconductor refrigeration plate, wiping its surface to prevent its surface from being covered by dust, dirt, etc., which will hinder the dissipation of heat and affect the use effect.

[0026] 3. The present invention protects the verification and calibration structure inside the box through a protective cover, which can isolate external airflow disturbances, provide a stable airflow environment for verification and calibration, and ensure the repeatability and accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0029] Figure 3 This is a schematic cross-sectional view of the box structure of the present invention;

[0030] Figure 4 This is a structural diagram of the ventilation fan of the present invention;

[0031] Figure 5 This is a structural diagram of the first rotating ring of the present invention;

[0032] Figure 6 This is a structural diagram of the scraping strip of the present invention;

[0033] Figure 7 This is a structural diagram of the guide plate of the present invention;

[0034] Figure 8 Structure profile diagram of the moving block in the application.

[0035] In the figure: 1, box; 2, protective cover; 3, ventilation filter screen; 4, ventilation fan; 5, first rotating ring; 6, first gear; 7, first rotating shaft; 8, second gear; 9, second rotating ring; 10, scraping plate; 11, semiconductor refrigeration piece; 12, baffle; 13, threaded rod; 14, first bevel gear; 15, second bevel gear; 16, second rotating shaft; 17, double-shaft motor; 18, guide plate; 19, connecting rod; 20, moving block; 21, spring; 22, reciprocating screw rod; 23, moving seat; 24, scraping strip; 25, third bevel gear; 26, fourth bevel gear; 27, third rotating shaft; 28, third gear; 29, fourth rotating shaft; 30, magnetic block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0037] As shown in the figure, in the embodiments of the application, a verification and calibration structure of a micro-pressure-difference airflow detection device includes a box 1, the top end of the box 1 is provided with a protective cover 2, both sides of the box 1 are provided with ventilation filter screens 3, one side of one of the ventilation filter screens 3 is provided with a ventilation fan 4, and the ventilation fan 4 is installed on the inner wall of the box 1. Figures 1 to 8

[0038] The inner wall of the box 1 is provided with a semiconductor refrigeration piece 11, and the outer wall of the semiconductor refrigeration piece 11 is provided with a control assembly and a cleaning assembly.

[0039] The existing CN222671303U discloses a micro-pressure-difference sensor verification and calibration device, and discloses the box 1 and the specific verification and calibration structure in the application file. The technical means is not described here.

[0040] The protective cover 2 is made of transparent and visible material (such as acrylic or tempered glass), which allows the operator to observe the verification and calibration process in real time, and reduces the disturbance to the environment without frequent opening of the box 1.

[0041] The ventilation fan 4 is driven by a built-in motor.

[0042] ​The inside of the box 1 is protected by the protective cover 2, which can isolate external air disturbance (such as air conditioning air, personnel walking), provide a stable air flow environment for calibration, and ensure the repeatability and accuracy of the measurement results.

[0043] As shown in Figures 1 to 8 , the control assembly includes baffles 12 arranged on both sides of the outer wall of the semiconductor refrigeration sheet 11. Each group of baffles 12 is threadedly connected to a threaded rod 13 at the bottom. One end of each threaded rod 13 is fixedly installed with a first bevel gear 14. One side of each first bevel gear 14 is meshingly connected to a second bevel gear 15. One end of each second bevel gear 15 is fixedly installed with a second rotating shaft 16. The two second rotating shafts 16 are installed at the two ends of a double-shaft motor 17.

[0044] The inside of the protective cover 2 is provided with a channel for gas flow. The semiconductor refrigeration sheet 11 is arranged inside the channel. The two groups of baffles 12 are located at the two ends of the semiconductor refrigeration sheet 11, separating the two ends (hot end or cold end) of the semiconductor refrigeration sheet 11 from the channel.

[0045] In operation, the double-shaft motor 17 is started and driven by PLC to rotate the second rotating shaft 16. The rotation of the second rotating shaft 16 drives the rotation of the second bevel gear 15. The rotation of the second bevel gear 15 drives the rotation of the first bevel gear 14. The rotation of the first bevel gear 14 drives the rotation of the threaded rod 13. The rotation of the threaded rod 13 drives the movement of the baffle 12. The two groups of baffles 12 change position, facilitating refrigeration or heating in the box 1, and significantly improving the accuracy, reliability, and applicability of calibration.

[0046] As shown in Figure 4 , Figure 6 , and Figure 7 , the two groups of baffles 12 are arranged alternately.

[0047] The inside of the box 1 is provided with a temperature sensor.

[0048] In operation, one group of baffles 12 is in contact with the outer wall of the semiconductor refrigeration sheet 11 to open the channel, and the other group is separated from the outer wall of the semiconductor refrigeration sheet 11 to close the channel, so that the gas flows from the hot end or the cold end during operation, and refrigeration or heating is performed.

[0049] As shown in Figure 4 and Figure 6 , the outer wall of the threaded rod 13 is provided with two threads, and the directions of the two threads are opposite.

[0050] When the threaded rod 13 rotates, the two baffles 12 mounted on the outer wall of the threaded rod 13 move relatively to open or close the channel.

[0051] As shown in Figures 1 to 5As shown, the outer wall of the ventilation fan 4 is fixedly installed with a first rotating ring 5, one side of the first rotating ring 5 is engagedly connected with a first gear 6, the inner wall of the first gear 6 is fixedly installed with a first rotating shaft 7, one end of the first rotating shaft 7 away from the first gear 6 is fixedly connected with a second gear 8, one side of the second gear 8 is engagedly connected with a second rotating ring 9, the second rotating ring 9 is rotatably installed on the inner wall of the box body 1, the inner wall of the second rotating ring 9 is fixedly installed with a scraping plate 10, and the scraping plate 10 is arranged on one side of the ventilation filter screen 3.

[0052] In work, the first rotating ring 5 is driven to rotate by the ventilation fan 4, the rotation of the first rotating ring 5 drives the rotation of the first gear 6, the rotation of the first gear 6 drives the rotation of the first rotating shaft 7, the rotation of the first rotating shaft 7 drives the rotation of the second gear 8, the rotation of the second gear 8 drives the rotation of the second rotating ring 9, and the rotation of the second rotating ring 9 drives the rotation of the scraping plate 10 on the surface of the ventilation filter screen 3, which helps to scrape off the dust attached to the surface of the ventilation filter screen 3, so as to ensure the ventilation efficiency.

[0053] As shown, Figures 1 to 4 The cleaning assembly includes a scraping strip 24 arranged on the outer wall of the semiconductor refrigeration sheet 11, the two scraping strips 24 are symmetrically arranged, the top end of each of the two scraping strips 24 is fixedly connected with a moving seat 23, the inner wall of each of the two moving seats 23 is threadedly connected with a reciprocating screw rod 22, the fourth rotating shaft 29 is installed between the two reciprocating screw rods 22, the outer wall of the fourth rotating shaft 29 is fixedly installed with a third bevel gear 25, one side of the third bevel gear 25 is engagedly connected with a fourth bevel gear 26, one end of the fourth bevel gear 26 is fixedly installed with a third rotating shaft 27, the outer wall of the third rotating shaft 27 is fixedly installed with a third gear 28, and the third gear 28 is arranged on the top end of the first rotating ring 5.

[0054] Through the arrangement of the cleaning assembly, in work, the first rotating ring 5 is driven to rotate by the ventilation fan 4, the rotation of the first rotating ring 5 drives the rotation of the third gear 28, the rotation of the third gear 28 drives the rotation of the third rotating shaft 27, the rotation of the third rotating shaft 27 drives the rotation of the fourth bevel gear 26, the rotation of the fourth bevel gear 26 drives the rotation of the third bevel gear 25, the rotation of the third bevel gear 25 drives the rotation of the reciprocating screw rod 22, the rotation of the reciprocating screw rod 22 drives the movement of the moving seat 23, the movement of the moving seat 23 drives the movement of the scraping strip 24, and the scraping strip 24 reciprocally moves on the outer wall of the semiconductor refrigeration sheet 11, wipes the surface of the semiconductor refrigeration sheet 11, prevents the surface of the semiconductor refrigeration sheet 11 from being covered by dust and dirt, and prevents the heat dissipation from being hindered and the use effect from being affected.

[0055] As shown, Figure 8As shown, the outer wall of the reciprocating screw rod 22 is provided with a magnetic block 30, the outer wall of the magnetic block 30 is provided with a moving block 20, the bottom end of the moving block 20 is fixedly connected with a guide plate 18, one side of the guide plate 18 is provided with a connecting rod 19, and the connecting rod 19 is fixedly installed at the top end of the baffle 12.

[0056] The end of the connecting rod 19 close to the guide plate 18 is wedge-shaped, for guiding the guide plate 18;

[0057] Through the arrangement of the moving block 20 and the connecting rod 19, the outer wall of both ends of the fourth rotating shaft 29 is provided with a first magnetic block 30, the outer wall of one end of the two reciprocating screw rods 22 close to the fourth rotating shaft 29 is provided with a second magnetic block 30, and the two guide plates 18 are provided with a third magnetic block 30, and the third magnetic block 30 is magnetically connected between the first magnetic block 30 and the second magnetic block 30;

[0058] When the baffle 12 moves to open the channel, the movement of one of the baffles 12 drives the movement of the guide plate 18, the movement of the guide plate 18 drives the movement of the connecting rod 19, the movement of the connecting rod 19 drives the movement of the moving block 20, and the connection state between the third magnetic block 30 in the moving block 20 and the first magnetic block 30 and the second magnetic block 30 is changed;

[0059] When working, the third magnetic block 30 on the side of the baffle 12 away from the channel opening side of the semiconductor refrigeration piece 11 is connected with the first magnetic block 30 and the second magnetic block 30 at the same time, the rotation of the fourth rotating shaft 29 drives the rotation of the magnetic block 30 and the reciprocating screw rod 22, the reciprocating movement of the scraping strip 24 at this position cleans the outer wall of the semiconductor refrigeration piece 11, and the third magnetic block 30 on the side of the baffle 12 close to the channel closing side of the semiconductor refrigeration piece 11 is not connected with the first magnetic block 30 and the second magnetic block 30, and the scraping strip 24 at this position is not moving.

[0060] As shown in the drawings, Figure 8 The magnetic block 30 is rotationally connected with the moving block 20.

[0061] As shown in the drawings, Figure 6 And Figure 8 The moving block 20 is slidingly installed on the inner wall of the box body 1, and one side of the moving block 20 is provided with a spring 21.

[0062] When the connecting rod 19 moves to drive the guide plate 18 to move, the spring 21 is deformed to store elastic potential energy, and when the connecting rod 19 moves away from the guide plate 18, the spring 21 releases the elastic potential energy to reset.

[0063] A working method of a kind of micro-pressure-difference air flow detection device's verification calibration structure, comprising the following steps:

[0064] S1: when working, first install the micro-pressure difference airflow detection device into the box 1, and connect with the detection and calibration structure, then cover the protective cover 2;

[0065] S2: then drive the first rotating ring 5 to rotate through the ventilation fan 4, the rotation of the first rotating ring 5 drives the rotation of the first gear 6, the rotation of the first gear 6 drives the rotation of the first rotating shaft 7, the rotation of the first rotating shaft 7 drives the rotation of the second gear 8, the rotation of the second gear 8 drives the rotation of the second rotating ring 9, the rotation of the second rotating ring 9 drives the rotation of the scraping plate 10 on the surface of the ventilation filter screen 3, which helps to scrape off the dust attached to the surface of the ventilation filter screen 3, to ensure the ventilation efficiency;

[0066] S3: then according to the actual situation of the temperature inside the box 1, drive the second rotating shaft 16 to rotate through the PLC control double-shaft motor 17, the rotation of the second rotating shaft 16 drives the rotation of the second bevel gear 15, the rotation of the second bevel gear 15 drives the rotation of the first bevel gear 14, the rotation of the first bevel gear 14 drives the rotation of the threaded rod 13, the rotation of the threaded rod 13 drives the movement of the baffle 12, so that the two groups of baffles 12 change positions, one group of baffles 12 is in contact with the outer wall of the semiconductor refrigeration piece 11 to open the channel, and the other group is separated from the outer wall of the semiconductor refrigeration piece 11 to close the channel, so that the gas flows from the hot end or the cold end to perform refrigeration or heating during work;

[0067] S4: at the same time, the movement of the baffle 12 drives the movement of the guide plate 18, the movement of the guide plate 18 drives the movement of the connecting rod 19, the movement of the connecting rod 19 drives the movement of the moving block 20, changes the connection state between the third magnetic block 30 inside the moving block 20 and the first magnetic block 30 and the second magnetic block 30, the third magnetic block 30 on the side where the baffle 12 is away from the semiconductor refrigeration piece 11 and the channel is open is connected with the first magnetic block 30 and the second magnetic block 30 at the same time, the rotation of the fourth rotating shaft 29 drives the rotation of the magnetic block 30 and the reciprocating screw rod 22, the scraping strip 24 at this position moves back and forth to clean the outer wall of the semiconductor refrigeration piece 11, while the third magnetic block 30 on the side where the baffle 12 is close to the semiconductor refrigeration piece 11 and the channel is closed is not connected with the first magnetic block 30 and the second magnetic block 30, the scraping strip 24 at this position does not move;

[0068] S5: at the same time, the rotation of the first rotating ring 5 drives the rotation of the third gear 28, the rotation of the third gear 28 drives the rotation of the third rotating shaft 27, the rotation of the third rotating shaft 27 drives the rotation of the fourth bevel gear 26, the rotation of the fourth bevel gear 26 drives the rotation of the third bevel gear 25, the rotation of the third bevel gear 25 drives the rotation of the reciprocating screw rod 22, the rotation of the reciprocating screw rod 22 drives the movement of the moving seat 23, the movement of the moving seat 23 drives the movement of the scraping strip 24, so that the scraping strip 24 moves back and forth on the outer wall of the semiconductor refrigeration piece 11 to wipe the surface thereof;

[0069] S6: When the temperature in the box 1 is adjusted, the micro-pressure difference airflow detection device is calibrated.

[0070] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application will be defined with respect to the appended claims and equivalents thereof, which can include other embodiments.

Claims

1. A calibration structure for a micro-pressure differential airflow detection device, comprising a housing (1), characterized in that: A protective cover (2) is installed at the top of the box (1), ventilation filters (3) are installed on both sides of the box (1), a ventilation fan (4) is provided on one side of one of the ventilation filters (3), and the ventilation fan (4) is installed on the inner wall of the box (1); A semiconductor refrigeration plate (11) is installed on the inner wall of the box body (1), and a control component and a cleaning component are provided on the outer wall of the semiconductor refrigeration plate (11).

2. The calibration structure of a micro-pressure differential airflow detection device according to claim 1, characterized in that: The control component includes baffles (12) arranged on both sides of the outer wall of the semiconductor refrigeration plate (11), and the baffles (12) are provided in two groups. The bottom of each group of baffles (12) is threadedly connected to a threaded rod (13), and one end of the two threaded rods (13) is fixedly installed with a first bevel gear (14), one side of the two first bevel gears (14) is meshedly connected with a second bevel gear (15), and one end of the two second bevel gears (15) is fixedly installed with a second rotating shaft (16), and the two second rotating shafts (16) are respectively installed at the two ends of the dual-axis motor (17).

3. The calibration structure of a micro-pressure differential airflow detection device according to claim 2, characterized in that: The two groups of baffles (12) are arranged alternately.

4. The calibration structure for a micro-pressure differential airflow detection device according to claim 2, characterized in that: The outer wall of the threaded rod (13) is provided with two threads, and the two threads are in opposite directions.

5. The calibration structure for a micro-pressure differential airflow detection device according to claim 1, characterized in that: A first rotating ring (5) is fixedly mounted on the outer wall of the ventilation fan (4); a first gear (6) is meshedly connected to one side of the first rotating ring (5); a first rotating shaft (7) is fixedly mounted on the inner wall of the first gear (6); a second gear (8) is fixedly connected to one end of the first rotating shaft (7) away from the first gear (6); a second rotating ring (9) is meshedly connected to one side of the second gear (8); the second rotating ring (9) is rotatably mounted on the inner wall of the box body (1); a scraper (10) is fixedly mounted on the inner wall of the second rotating ring (9); and the scraper (10) is arranged on one side of the ventilation filter (3).

6. The calibration structure for a micro-pressure differential airflow detection device according to claim 1, characterized in that: The cleaning component includes a scraping strip (24) arranged on the outer wall of the semiconductor refrigeration plate (11), and two scraping strips (24) are symmetrically arranged. The top ends of the two scraping strips (24) are fixedly connected to the movable seat (23), and the inner walls of the two movable seats (23) are threadedly connected to the reciprocating screw rods (22). A fourth rotating shaft (29) is installed between the two reciprocating screw rods (22). The outer wall of the fourth rotating shaft (29) is fixedly installed with a third bevel gear (25), and one side of the third bevel gear (25) is meshedly connected with a fourth bevel gear (26). One end of the fourth bevel gear (26) is fixedly installed with a third rotating shaft (27), and the outer wall of the third rotating shaft (27) is fixedly installed with a third gear (28). The third gear (28) is arranged at the top end of the first rotating ring (5).

7. The verification and calibration structure of a micro-pressure differential airflow detection device according to claim 6, characterized in that: A magnetic block (30) is installed on the outer wall of the reciprocating screw rod (22), and a moving block (20) is provided on the outer wall of the magnetic block (30). The bottom end of the moving block (20) is fixedly connected to a guide plate (18), and a connecting rod (19) is provided on one side of the guide plate (18). The connecting rod (19) is fixedly installed on the top end of the baffle (12).

8. The calibration structure for a micro-pressure differential airflow detection device according to claim 7, characterized in that: The magnetic block (30) is rotationally connected to the moving block (20).

9. The verification and calibration structure of a micro-pressure differential airflow detection device according to claim 7, characterized in that: The moving block (20) is slidably mounted on the inner wall of the box body (1), and a spring (21) is provided on one side of the moving block (20).

10. A method for operating a calibration structure of a micro-pressure differential airflow detection device, the method being applicable to the calibration structure of a micro-pressure differential airflow detection device according to claims 1 to 9, characterized in that: The following steps are involved: S1: When working, first install the micro-pressure differential airflow detection device into the box (1), connect it to the verification and calibration structure, and then cover the protective cover (2); S2: The ventilation fan (4) then drives the first rotating ring (5) to rotate, the rotation of the first rotating ring (5) drives the rotation of the first gear (6), the rotation of the first gear (6) drives the rotation of the first rotating shaft (7), the rotation of the first rotating shaft (7) drives the rotation of the second gear (8), the rotation of the second gear (8) drives the rotation of the second rotating ring (9), and the rotation of the second rotating ring (9) drives the scraping plate (10) to rotate on the surface of the ventilation filter (3), which helps to scrape off the dust attached to the surface of the ventilation filter (3) to ensure ventilation efficiency; S3: Then, according to the actual temperature inside the box (1), the PLC controls the dual-axis motor (17) to start driving the second rotating shaft (16) to rotate, the rotation of the second rotating shaft (16) drives the rotation of the second bevel gear (15), the rotation of the second bevel gear (15) drives the rotation of the first bevel gear (14), the rotation of the first bevel gear (14) drives the rotation of the threaded rod (13), and the rotation of the threaded rod (13) drives the movement of the baffle (12), so that the two groups of baffles (12) change their positions, one group of baffles (12) contacts the outer wall of the semiconductor refrigeration plate (11) to open the channel, and the other group separates from the outer wall of the semiconductor refrigeration plate (11) to close the channel, so that gas flows from the hot end or the cold end during operation to perform cooling or heating; S4: At the same time, the movement of the baffle (12) drives the movement of the guide plate (18), the movement of the guide plate (18) drives the movement of the connecting rod (19), and the movement of the connecting rod (19) drives the movement of the moving block (20), changing the connection state between the third magnetic block (30) inside the moving block (20) and the first magnetic block (30) and the second magnetic block (30). The baffle (12) is away from the third magnetic block (30) on the side where the channel of the semiconductor refrigeration plate (11) is opened, and simultaneously connects with the first magnetic block (30). The magnetic block (30) is connected to the second magnetic block (30), and the rotation of the fourth rotating shaft (29) drives the magnetic block (30) and the reciprocating screw (22) to rotate, and the scraping strip (24) at this position reciprocates to clean the outer wall of the semiconductor refrigeration plate (11), while the third magnetic block (30) on the side of the baffle (12) on the other side close to the semiconductor refrigeration plate (11) channel is not connected to the first magnetic block (30) and the second magnetic block (30), and the scraping strip (24) at this position does not move; S5: At the same time, the rotation of the first rotating ring (5) drives the rotation of the third gear (28), the rotation of the third gear (28) drives the rotation of the third rotating shaft (27), the rotation of the third rotating shaft (27) drives the rotation of the fourth bevel gear (26), the rotation of the fourth bevel gear (26) drives the rotation of the third bevel gear (25), the rotation of the third bevel gear (25) drives the rotation of the reciprocating screw (22), the rotation of the reciprocating screw (22) drives the movement of the movable seat (23), the movement of the movable seat (23) drives the movement of the scraping strip (24), so that the scraping strip (24) moves back and forth on the outer wall of the semiconductor refrigeration plate (11) to wipe its surface; S6: After the temperature in the box (1) is adjusted, the micro-pressure difference airflow detection device is calibrated.

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