Intelligent ventilation cabinet for laboratory

Abstract

The utility model discloses an intelligent ventilation cabinet for a laboratory. The intelligent ventilation cabinet comprises a cabinet body, an air inlet rate adjusting mechanism and an exhaust fan, a storage groove is formed in the middle end of the front side face of the cabinet body, and a mounting groove is formed in the middle of the top wall of the storage groove; the air inlet rate adjusting mechanism is arranged in the middle of the right side surface of the cabinet body; the exhaust fan is fixedly connected to the interior of the mounting groove, an exhaust frame is fixedly connected to the upper surface of the exhaust fan, a gas flow sensor is fixedly connected to the interior of a gas outlet of the exhaust frame, an exhaust port is formed in the middle of the upper surface of the cabinet body, and the exhaust end of the gas flow sensor is fixedly connected with the interior of the exhaust port; the upper surface of the exhaust port is fixedly connected with a connecting flange, and the interior of the connecting flange communicates with the interior of the exhaust port. According to the intelligent ventilation cabinet for the laboratory, the air inlet rate can be adjusted through rotation of the impeller, the internal oxygen concentration is adjusted by adjusting the air inlet rate and the exhaust rate, and the storage conditions of part of materials are more sufficient and perfect.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory material storage, in particular to an intelligent laboratory fume hood. Background Technique

[0002] Various special materials are often used in the experiment process. Some materials have specific requirements for oxygen concentration and ventilation during storage, while some other materials will emit harmful gases during storage. Therefore, an intelligent laboratory fume hood is needed for storage;

[0003] Some traditional intelligent laboratory fume hoods exhaust air from the inside of the equipment through devices such as exhaust fans, and monitor the gas inside through gas sensors;

[0004] The current intelligent laboratory fume hoods have the following problems. For example, the intake air depends on natural intake air, the intake air rate is difficult to regulate, and it is difficult to regulate the internal oxygen concentration by the intake air rate and the exhaust air rate together. For this reason, we propose an intelligent laboratory fume hood. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide an intelligent laboratory fume hood, which can adjust the intake air rate by adjusting the impeller speed, and can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an intelligent laboratory fume hood, including a cabinet body, an intake air rate regulating mechanism and an exhaust fan;

[0007] Cabinet body: A placement groove is opened in the middle of the front side surface thereof, and an installation groove is opened in the middle of the top wall of the placement groove;

[0008] Intake air rate regulating mechanism: It is arranged in the middle of the right side surface of the cabinet body;

[0009] Exhaust fan: It is fixedly connected inside the installation groove. An exhaust frame is fixedly connected to the upper surface of the exhaust fan. A gas flow sensor is fixedly connected inside the air outlet of the exhaust frame. An exhaust port is opened in the middle of the upper surface of the cabinet body. The exhaust end of the gas flow sensor is fixedly connected to the inside of the exhaust port. A connection flange is fixedly connected to the upper surface of the exhaust port, and the inside of the connection flange is communicated with the inside of the exhaust port;

[0010] Among them: It also includes a first installation main board, the first installation main board is fixedly connected to the left end of the bottom wall of the upper end of the cabinet body. A single-chip microcomputer is fixedly connected to the upper surface of the first installation main board. The single-chip microcomputer is bidirectionally electrically connected to the gas flow sensor. The output end of the single-chip microcomputer is electrically connected to the input end of the exhaust fan. The intake air rate can be adjusted by the impeller rotation, and the internal oxygen concentration can be adjusted by adjusting the intake air rate and the exhaust air rate, so that the storage conditions of some materials are more sufficient and perfect.

[0011] Furthermore, the intake rate adjusting mechanism includes an intake avoidance groove, a rotating shaft, an avoidance groove, and an impeller. The intake avoidance groove is formed in the middle of the right side surface of the cabinet body. A rotating shaft is rotatably connected between the front and rear walls of the intake avoidance groove. An avoidance groove is formed at the rear end of the right wall of the storage groove. The rear end of the rotating shaft penetrates through the front wall of the avoidance groove. The front end of the outer surface of the rotating shaft is fixedly connected with an impeller, and the intake rate can be adjusted by the rotation of the impeller.

[0012] Furthermore, the intake rate adjusting mechanism further includes a worm gear and a worm. The right end of the upper bottom wall of the cabinet body is fixedly connected with a motor. The lower end of the output shaft of the motor penetrates through the top wall of the storage groove. The worm gear is fixedly sleeved on the outer surface of the rear end of the rotating shaft. The lower end of the output shaft of the motor is fixedly connected with a worm. The worm is meshed with the worm gear. The input end of the motor is electrically connected to the output end of the single-chip microcomputer, providing power for the rotation of the impeller.

[0013] Furthermore, an installation groove two is formed at the rear side of the upper bottom wall of the cabinet body. An installation main board two is fixedly connected inside the installation groove two. An air quality measurement sensor is fixedly connected inside the left end of the installation main board two. A combustible gas sensor is fixedly connected inside the right end of the installation main board two. The installation groove two penetrates through the top wall of the storage groove. Oxygen concentration sensors are fixedly connected to both the left and right ends of the upper bottom wall of the cabinet body. The oxygen concentration sensors, the air quality measurement sensor, and the combustible gas sensor are all bidirectionally electrically connected to the single-chip microcomputer, and the internal gas can be detected.

[0014] Furthermore, guide rails are fixedly connected to both the left and right walls at the front end of the storage groove. A support frame is slidably connected between the guide rails. A transparent glass plate is fixedly connected inside the support frame. A handle one is fixedly connected to the middle of the lower front side of the support frame. A sliding avoidance groove is formed at the front end of the top wall of the storage groove, and the position of the sliding avoidance groove corresponds to the support frame up and down, facilitating the placement and taking of experimental materials.

[0015] Furthermore, a chute is formed at the lower front side of the front side surface of the cabinet body. A plurality of uniformly distributed storage cabinets are slidably connected inside the chute. Handles two are fixedly connected to the front side surfaces of the storage cabinets, which can expand the storage space.

[0016] Furthermore, an installation main board three is fixedly connected to the middle of the left end of the front side surface of the cabinet body. An LCD display screen is fixedly connected to the upper front side of the installation main board three. A control switch is fixedly connected to the lower front side of the installation main board three. The input end of the LCD display screen is electrically connected to the output end of the single-chip microcomputer. The input end of the control switch is electrically connected to an external power supply. The output end of the control switch is electrically connected to the input end of the single-chip microcomputer, and the gas data can be intelligently displayed, facilitating laboratory personnel to timely check the internal gas components and concentrations.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: This intelligent laboratory fume hood has the following advantages:

[0018] When the intake air speed needs to be adjusted, the single-chip microcomputer controls the motor to start. The motor drives the worm to rotate when starting. The rotation of the worm drives the worm wheel to rotate. The rotation of the worm wheel drives the rotating shaft to rotate. The rotation of the rotating shaft drives the impeller to rotate. The rotation speed of the impeller affects the intake air rate. Thus, the intake air rate can be adjusted. By adjusting the intake air rate of the fume hood in the laboratory, the internal oxygen concentration can be adjusted more precisely, making the storage conditions of some materials in the fume hood of the laboratory more perfect. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic partial sectional structural diagram of the present utility model;

[0021] Figure 3 is a schematic top view partial sectional structural diagram of the present utility model;

[0022] Figure 4 is a schematic enlarged structural diagram at position A of the present utility model.

[0023] In the figure: 1 cabinet body, 2 storage groove, 3 guide rail, 4 support frame, 5 transparent glass plate, 6 handle one, 7 intake air rate adjustment mechanism, 71 intake air avoidance groove, 72 rotating shaft, 73 avoidance groove, 74 impeller, 75 worm wheel, 76 worm, 8 motor, 9 exhaust fan, 10 exhaust rack, 11 gas flow sensor, 12 connecting flange, 13 mounting main board one, 14 single-chip microcomputer, 15 mounting main board two, 16 air quality measurement sensor, 17 combustible gas sensor, 18 oxygen concentration sensor, 19 sliding avoidance groove, 20 storage cabinet, 21 handle two, 22 mounting main board three, 23 LCD display screen, 24 control switch. Specific Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-4 , this embodiment provides a technical solution: an intelligent laboratory fume hood, including a cabinet body 1, an intake air rate adjustment mechanism 7 and an exhaust fan 9;

[0026] Cabinet 1: A storage slot 2 is provided in the middle of the front side thereof. An installation slot is provided in the middle of the top wall of the storage slot 2. An installation slot two is provided at the rear side of the bottom wall at the upper end of the cabinet 1. An installation main board two 15 is fixedly connected inside the installation slot two. An air quality measurement sensor 16 is fixedly connected inside the left end of the installation main board two 15. A combustible gas sensor 17 is fixedly connected inside the right end of the installation main board two 15. The installation slot two penetrates through the top wall of the storage slot 2. Oxygen concentration sensors 18 are fixedly connected to both the left and right ends of the bottom wall at the upper end of the cabinet 1. The oxygen concentration sensors 18, the air quality measurement sensor 16, and the combustible gas sensor 17 are all bidirectionally electrically connected to the single-chip microcomputer 14. Guide rails 3 are fixedly connected to the front ends of the left and right walls of the storage slot 2. A support frame 4 is slidably connected between the interiors of the guide rails 3. A transparent glass plate 5 is fixedly connected inside the support frame 4. A handle one 6 is fixedly connected to the middle of the lower end of the front side of the support frame 4. A sliding avoidance slot 19 is provided at the front end of the top wall of the storage slot 2, and the position of the sliding avoidance slot 19 corresponds to the support frame 4 up and down. A chute is provided at the lower end of the front side of the cabinet 1. Evenly distributed storage cabinets 20 are slidably connected inside the chute. Handles two 21 are fixedly connected to the front sides of the storage cabinets 20. An installation main board three 22 is fixedly connected to the middle of the left end of the front side of the cabinet 1. An LCD display screen 23 is fixedly connected to the upper end of the front side of the installation main board three 22. A control switch 24 is fixedly connected to the lower end of the front side of the installation main board three 22. The input end of the LCD display screen 23 is electrically connected to the output end of the single-chip microcomputer 14. The input end of the control switch 24 is electrically connected to an external power supply. The output end of the control switch 24 is electrically connected to the input end of the single-chip microcomputer 14;

[0027] Intake rate adjustment mechanism 7: It is arranged in the middle of the right side of the cabinet body 1. The intake rate adjustment mechanism 7 includes an intake avoidance groove 71, a rotating shaft 72, an avoidance groove 73 and an impeller 74. The intake avoidance groove 71 is opened in the middle of the right side of the cabinet body 1. A rotating shaft 72 is rotatably connected between the front and rear walls of the intake avoidance groove 71. An avoidance groove 73 is opened at the rear end of the right wall of the storage groove 2. The rear end of the rotating shaft 72 penetrates the front wall of the avoidance groove 73. The front end of the outer surface of the rotating shaft 72 is fixedly connected with an impeller 74. The intake rate adjustment mechanism 7 further includes a worm gear 75 and a worm 76. The right end of the upper bottom wall of the cabinet body 1 is fixedly connected with a motor 8. The lower end of the output shaft of the motor 8 penetrates the top wall of the storage groove 2. The worm gear 75 is fixedly sleeved on the outer surface of the rear end of the rotating shaft 72. The lower end of the output shaft of the motor 8 is fixedly connected with a worm 76. The worm 76 is meshed with the worm gear 75. The input end of the motor 8 is electrically connected with the output end of the single-chip microcomputer 14. When the intake speed needs to be adjusted, the single-chip microcomputer 14 controls the motor 8 to start. The motor 8 starts to drive the worm 76 to rotate. The worm 76 rotates to drive the worm gear 75 to rotate. The worm gear 75 rotates to drive the rotating shaft 72 to rotate. The rotating shaft 72 rotates to drive the impeller 74 to rotate. The rotation speed of the impeller 74 affects the intake rate. Thus, the intake rate can be adjusted. By adjusting the intake rate, the internal oxygen concentration can be adjusted more precisely, making the storage conditions of some materials more perfect;

[0028] Exhaust fan 9: It is fixedly connected inside the installation groove. The upper surface of the exhaust fan 9 is fixedly connected with an exhaust frame 10. A gas flow sensor 11 is fixedly connected inside the air outlet of the exhaust frame 10. An exhaust port is opened in the middle of the upper surface of the cabinet body 1. The exhaust end of the gas flow sensor 11 is fixedly connected with the inside of the exhaust port. A connection flange 12 is fixedly connected to the upper surface of the exhaust port. The inside of the connection flange 12 is communicated with the inside of the exhaust port;

[0029] Among them: It further includes an installation main board 13. The installation main board 13 is fixedly connected to the left end of the upper bottom wall of the cabinet body 1. The upper surface of the installation main board 13 is fixedly connected with a single-chip microcomputer 14. The single-chip microcomputer 14 is bidirectionally electrically connected with the gas flow sensor 11. The output end of the single-chip microcomputer 14 is electrically connected with the input end of the exhaust fan 9.

[0030] The working principle of an intelligent laboratory fume hood provided by the present utility model is as follows: During the working process, the staff places the laboratory materials that need to be ventilated in the bottom wall of the placement groove 2 of the laboratory fume hood. When the laboratory materials are placed, gases are generated. The oxygen concentration sensor 18, the air quality measurement sensor 16, and the combustible gas sensor 17 detect the oxygen concentration, the internal harmful gas components, and the combustible gas concentration inside the placement groove 2, and transmit the gas data to the single-chip microcomputer 14. When the internal gas condition reaches the threshold value, the single-chip microcomputer 14 starts the exhaust fan 9. The exhaust fan 9 sends the internal gas of the placement groove 2 into the inside of the exhaust rack 10. The gas is sent into the inside of the exhaust port through the gas flow sensor 11. The gas flow sensor 11 then transmits the detected gas flow data to the single-chip microcomputer 14. The single-chip microcomputer 14 then transmits all the data to the LCD display screen 23 and thus displays it on the LCD display screen 23. Thus, intelligent ventilation and exhaust can be carried out inside. Some laboratory materials have specific requirements for the internal oxygen concentration. Therefore, it is necessary to adjust the intake speed. The internal oxygen concentration is adjusted by adjusting the intake speed and the exhaust speed. The exhaust speed is detected by the gas flow sensor 11. When the intake speed needs to be adjusted, the single-chip microcomputer 14 controls the motor 8 to start. The start of the motor 8 drives the worm 76 to rotate. The rotation of the worm 76 drives the worm gear 75 to rotate. The rotation of the worm gear 75 drives the rotating shaft 72 to rotate. The rotation of the rotating shaft 72 drives the impeller 74 to rotate. The rotation speed of the impeller 74 affects the intake rate. Thus, the intake rate can be adjusted. By adjusting the intake rate, the internal oxygen concentration can be adjusted more precisely, making the storage conditions of some laboratory materials more perfect.

[0031] It should be noted that in the above embodiments, the single-chip microcomputer 14 disclosed can be selected as STC89C52RC, the motor 8 can be selected as YS6324, the air quality measurement sensor 16 can be selected as MQ-135, the combustible gas sensor 17 can be selected as MQ-9 combustible gas sensor, the oxygen concentration sensor 18 can be selected as S4OXV, and the gas flow sensor 11 can be selected as CAFS3000. The connection methods between the single-chip microcomputer 14 and the motor 8, the air quality measurement sensor 16, the combustible gas sensor 17, the oxygen concentration sensor 18, and the gas flow sensor 11 all adopt the common methods in the prior art.

[0032] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A laboratory intelligent fume hood, characterized in that: It comprises a cabinet (1), an air intake rate regulating mechanism (7) and an exhaust fan (9); The cabinet (1) has a storage groove (2) at the middle end of the front side surface, and a mounting groove is provided at the middle of the top wall of the storage groove (2); An air intake rate regulating mechanism (7) is arranged in the middle of the right side of the cabinet (1); An exhaust fan (9) is fixedly connected to the inside of the installation groove, an exhaust frame (10) is fixedly connected to the upper surface of the exhaust fan (9), a gas flow sensor (11) is fixedly connected to the inside of the gas outlet of the exhaust frame (10), an exhaust port is opened in the middle of the upper surface of the cabinet (1), an exhaust end of the gas flow sensor (11) is fixedly connected to the inside of the exhaust port, a connecting flange (12) is fixedly connected to the upper surface of the exhaust port, and the inside of the connecting flange (12) is connected to the inside of the exhaust port; The invention further comprises a mounting mainboard (13), wherein the mounting mainboard (13) is fixedly connected to the left end of the upper bottom wall of the cabinet (1), and a single-chip computer (14) is fixedly connected to the upper surface of the mounting mainboard (13), the single-chip computer (14) is bidirectionally electrically connected to the gas flow sensor (11), and the output end of the single-chip computer (14) is electrically connected to the input end of the exhaust fan (9).

2. A laboratory intelligent fume hood according to claim 1, characterized in that: The air intake rate regulating mechanism (7) comprises an air intake avoidance groove (71), a rotating shaft (72), an avoidance groove (73) and an impeller (74); the air intake avoidance groove (71) is arranged in the middle of the right side of the cabinet (1); a rotating shaft (72) is rotatably connected between the front and rear walls of the air intake avoidance groove (71); the avoidance groove (73) is arranged at the rear end of the right wall of the storage groove (2); the rear end of the rotating shaft (72) passes through the front wall of the avoidance groove (73); and the front end of the outer surface of the rotating shaft (72) is fixedly connected to the impeller (74).

3. A laboratory intelligent fume hood according to claim 2, characterized in that: The air intake rate regulating mechanism (7) further comprises a worm wheel (75) and a worm (76); a motor (8) is fixedly connected to the right end of the upper bottom wall of the cabinet (1); the lower end of the output shaft of the motor (8) passes through the top wall of the storage slot (2); the worm wheel (75) is fixedly sleeved on the rear end of the outer surface of the rotating shaft (72); the lower end of the output shaft of the motor (8) is fixedly connected to the worm (76); the worm (76) is meshingly connected to the worm wheel (75); and the input end of the motor (8) is electrically connected to the output end of the single-chip computer (14).

4. A laboratory intelligent fume hood according to claim 1, characterized in that: The cabinet (1) is provided with a second installation groove at the rear side of the upper bottom wall, a second installation mainboard (15) is fixedly connected inside the second installation groove, an air quality measurement sensor (16) is fixedly connected inside the left end of the second installation mainboard (15), and a combustible gas sensor (17) is fixedly connected inside the right end of the second installation mainboard (15), the second installation groove penetrates the top wall of the storage groove (2), and oxygen concentration sensors (18) are fixedly connected to the left and right ends of the upper bottom wall of the cabinet (1), and the oxygen concentration sensor (18), the air quality measurement sensor (16) and the combustible gas sensor (17) are all bidirectionally electrically connected to the single-chip computer (14).

5. The intelligent laboratory fume hood according to claim 1, characterized in that: The front ends of the left and right walls of the storage slot (2) are fixedly connected to guide rails (3), the inside of the guide rails (3) is slidably connected to a support frame (4), the inside of the support frame (4) is fixedly connected to a transparent glass plate (5), the middle part of the lower end of the front side of the support frame (4) is fixedly connected to a handle (6), and the front end of the top wall of the storage slot (2) is provided with a sliding avoidance groove (19), and the position of the sliding avoidance groove (19) corresponds to the upper and lower positions of the support frame (4).

6. The intelligent laboratory fume hood according to claim 1, characterized in that: A slide groove is provided at the lower end of the front side of the cabinet body (1), and evenly distributed storage cabinets (20) are slidably connected inside the slide groove, and the front side of the storage cabinet (20) is fixedly connected with a second handle (21).

7. The intelligent laboratory fume hood according to claim 1, characterized in that: A mainboard installation three (22) is fixedly connected to the middle of the left end of the front side of the cabinet (1), an LCD display screen (23) is fixedly connected to the upper end of the front side of the mainboard installation three (22), and a control switch (24) is fixedly connected to the lower end of the front side of the mainboard installation three (22), an input end of the LCD display screen (23) is electrically connected to an output end of the single-chip computer (14), an input end of the control switch (24) is electrically connected to an external power supply, and an output end of the control switch (24) is electrically connected to an input end of the single-chip computer (14).

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