Variable air volume adjusting device of laboratory exhaust cabinet

Abstract

The utility model relates to the technical field of exhaust cabinet variable air volume regulation, and discloses a laboratory exhaust cabinet variable air volume regulating device which comprises an exhaust cabinet body, a lifting assembly is arranged on the inner top wall of the exhaust cabinet body, and the bottom end of the lifting assembly is fixedly connected with a regulating door. A displacement sensor is fixedly installed in the middle of the inner side of the adjusting door, and a plurality of sterilization assemblies are arranged on the two sides of the inner wall of the exhaust cabinet body. According to the variable air volume adjusting device for the laboratory exhaust cabinet, through the arrangement of the sterilization assembly, after use is finished, an ultraviolet sterilization lamp is turned on and emits ultraviolet rays, bacteria, viruses and other microorganisms in air in the exhaust cabinet body are killed after irradiation for a certain time, and then the air volume is adjusted; and therefore, the effect of sterilizing the interior of the exhaust cabinet is achieved, the situation that after the exhaust cabinet is used, bacteria and virus residues possibly exist in the exhaust cabinet is avoided, and the risk that experimenters are exposed to harmful microorganisms can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of exhaust cabinet variable air volume regulation, especially to a laboratory exhaust cabinet variable air volume regulation device. BACKGROUND

[0002] The laboratory exhaust cabinet is an equipment for exhaust ventilation in the laboratory. The most important function is the exhaust function. In the chemical laboratory, various harmful gases, odors, moisture, and flammable, explosive, and corrosive substances are generated during the experiment. In order to protect the safety of the user and prevent the spread of pollutants in the laboratory, an exhaust cabinet is used near the pollution source. At the same time, the air volume demand of the exhaust cabinet in the laboratory will change with the change of the working state to ensure safety and energy efficiency, so the laboratory exhaust cabinet variable air volume regulation device is needed.

[0003] The laboratory exhaust cabinet variable air volume regulation device disclosed in the publication number CN221171263U, although the utility model discloses a kind of installation components, when using, through the mutual cooperation of first ring piece, second ring piece, rectangular block, first rectangular groove and second rectangular groove, the installation mode of rotation clamping is utilized, it is convenient for staff to quickly butt joint venturi valve body, ensure the stability of installation, and also reduce the labor intensity of staff, by using this way, staff need not to be fixed by bolt, time-saving and labor-saving in operation process, it is convenient for staff to carry out the disassembly work of later period.

[0004] However, the laboratory exhaust cabinet variable air volume regulation device has the following shortcomings: after the use of the laboratory exhaust cabinet is finished, bacteria and viruses may be left in the interior of the exhaust cabinet, which is inconvenient to reduce the risk of exposure of experimental personnel to harmful microorganisms. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] The utility model aims to provide a kind of laboratory exhaust cabinet variable air volume regulation device, to solve the problem of not being convenient to reduce the risk of exposure of experimental personnel to harmful microorganisms in the above background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the utility model discloses a laboratory exhaust air cabinet variable air volume adjusting device through the following technical scheme, a laboratory exhaust air cabinet variable air volume adjusting device, including the exhaust air cabinet body, the inner top wall of exhaust air cabinet body is provided with the lifting assembly, the bottom fixedly connected of lifting assembly has the adjusting door, the middle fixed mounting of adjusting door inboard has displacement sensor, the both sides of exhaust air cabinet body inner wall all are provided with a plurality of groups of sterilization subassembly, the one side of exhaust air cabinet body inside is provided with the ventilation pipeline, the one side of ventilation pipeline is provided with a plurality of groups of exhaust component, the top fixedly connected of ventilation pipeline has the air volume adjusting assembly,

[0009] The sterilization subassembly includes the lamp shade fixedly arranged on the both sides of the exhaust air cabinet body, and the ultraviolet sterilization lamp is fixedly installed in the lamp shade.

[0010] The air volume adjusting assembly includes the air cylinder fixedly connected to the top of the ventilation pipeline, the fan is fixedly installed in the air cylinder, the servo motor is fixedly installed above one side of the air cylinder, the output end of the servo motor is spline-connected with the transmission rod, and the transmission rod is fixedly connected with the adjusting plate at one end.

[0011] As a further scheme of the utility model, the lifting assembly includes a bidirectional motor arranged on the inner top wall of the exhaust air cabinet body, the output ends of the two ends of the bidirectional motor are spline-connected with the transmission rods, one end of the transmission rod is fixedly connected with a rotating rod, and the rotating rod is convenient to rotate.

[0012] As a further scheme of the utility model, one end of the rotating rod is fixedly connected with a receiving shaft, and the surface of the receiving shaft is wound with a lifting rope, and the lifting rope is convenient to lift the adjusting door.

[0013] As a further scheme of the utility model, the exhaust component includes an exhaust pipe arranged on one side of the ventilation pipeline, and the electromagnetic valve is fixedly installed on the top surface of the exhaust pipe, and the electromagnetic valve is convenient to control the opening and closing of the exhaust pipe.

[0014] As a further scheme of the utility model, the edge of the front upper side of the exhaust air cabinet body is fixedly installed with a PLC controller, one side of the PLC controller is electrically connected to the displacement sensor and the servo motor through the power line respectively, and the PLC controller is convenient to control each device.

[0015] As a further scheme of the utility model, the middle of the bottom surface of the outer side of the adjusting door is fixedly connected with a handle, the handle is made of stainless steel, and the handle is convenient to pull down the adjusting door.

[0016] As a further scheme of the utility model, the edges of the both sides of the inner wall of the exhaust air cabinet body are provided with a sliding groove, the both sides of the sliding groove are matched with the adjusting door, and the sliding groove is convenient to keep the stability of lifting and pulling down the adjusting door.

[0017] (Three) beneficial effects

[0018] This utility model provides a variable air volume regulating device for laboratory fume hoods, which has the following beneficial effects:

[0019] 1. This laboratory fume hood variable air volume adjustment device, through the configuration of displacement sensors, exhaust components, air volume adjustment components, and a PLC controller, operates by starting the fan and bidirectional motor, rotating the lever, and retracting the lifting rope to change the height of the adjustment door. When the displacement sensor reaches the preset height threshold, the PLC controller controls a group of solenoid valves to automatically open. Then, based on the number of exhaust ducts opened, the PLC controller simultaneously controls the servo motor, the transmission rod to rotate, and the adjustment plate to adjust the air volume. This allows the air volume to be adjusted according to the number of exhaust ducts, thereby achieving the purpose of adjusting the air volume of the fume hood according to the laboratory's work needs. This avoids the spread of pollutants into the laboratory due to a fixed air volume, and helps to improve the convenience and intelligence of the laboratory fume hood variable air volume adjustment.

[0020] 2. The variable air volume regulating device of this laboratory fume hood, through the setting of the sterilization component, activates the ultraviolet germicidal lamp after use. The ultraviolet germicidal lamp emits ultraviolet light, which, after a certain period of irradiation, kills bacteria, viruses and other microorganisms in the air inside the fume hood, thereby achieving the effect of sterilizing the inside of the fume hood. This avoids the possibility of bacteria and viruses remaining inside the laboratory fume hood after use, and helps reduce the risk of laboratory personnel being exposed to harmful microorganisms. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the sterilization component structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the exhaust component structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the air volume regulating component of this utility model;

[0025] Figure 5 This is a schematic diagram of the lifting component and regulating door structure of this utility model.

[0026] In the diagram: 1. Fume cabinet body; 2. Lifting assembly; 201. Bidirectional motor; 202. Rotating rod;

[0027] 203. Storage shaft; 204. Lifting rope; 3. Adjustable door; 4. Displacement sensor; 5. Sterilization component;

[0028] 501. Lampshade; 502. Ultraviolet germicidal lamp; 6. Ventilation duct; 7. Exhaust assembly; 701. Exhaust pipe; 702. Solenoid valve; 8. Air volume adjustment assembly; 801. Air duct; 802. Fan; 803. Servo motor; 804. Adjustment plate; 9. PLC controller; 10. Handle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] Please see Figures 1 to 5 This utility model provides a technical solution: a laboratory exhaust hood variable air volume adjustment device, including an exhaust hood body 1, a lifting component 2 is provided on the inner top wall of the exhaust hood body 1, an adjustment door 3 is fixedly connected to the bottom end of the lifting component 2, a displacement sensor 4 is fixedly installed in the middle of the inner side of the adjustment door 3, several sets of sterilization components 5 are provided on both sides of the inner wall of the exhaust hood body 1, a ventilation duct 6 is provided on one side inside the exhaust hood body 1, several sets of exhaust components 7 are provided on one side of the ventilation duct 6, and an air volume adjustment component 8 is fixedly connected to the top of the ventilation duct 6;

[0031] The sterilization component 5 includes lamp covers 501 that are fixedly installed on both sides of the inner wall of the fume hood body 1. An ultraviolet germicidal lamp 502 is fixedly installed inside the lamp cover 501. After use, the ultraviolet germicidal lamp 502 is turned on and emits ultraviolet light. After a certain period of irradiation, the ultraviolet germicidal lamp 502 kills bacteria, viruses and other microorganisms in the air inside the fume hood body 1, thereby achieving the effect of sterilizing the inside of the fume hood. This avoids the possibility of bacteria and viruses remaining inside the fume hood after use, and helps to reduce the risk of laboratory personnel being exposed to harmful microorganisms.

[0032] The airflow regulating component 8 includes an air duct 801 fixedly connected to the top of the ventilation duct 6. A fan 802 is fixedly installed inside the air duct 801. A servo motor 803 is fixedly installed on the upper side of one side of the air duct 801. A transmission rod is splined to the output end of the servo motor 803, and an adjusting plate 804 is fixedly connected to one end of the transmission rod. Through the settings of the displacement sensor 4, the exhaust component 7, the airflow regulating component 8, and the PLC controller 9, when in use, the fan 802 and the bidirectional motor 201 are started, the rotating rod 202 rotates, retracting the lifting rope 204 and changing the height of the regulating door 3. When displacement sensor 4 reaches a preset height threshold, PLC controller 9 controls a group of solenoid valves 702 to automatically open. Then, based on the number of exhaust ducts 701 that are open, PLC controller 9 simultaneously controls servo motor 803, and the transmission rod rotates, which in turn adjusts the regulating plate 804. This allows the airflow to be adjusted according to the number of exhaust ducts 701, thereby achieving the purpose of adjusting the airflow of the fume hood according to the laboratory's work needs. This avoids the problem of fixed airflow causing pollutants to spread into the laboratory, and helps to improve the convenience and intelligence of variable airflow adjustment in laboratory fume hoods.

[0033] The lifting component 2 includes a bidirectional motor 201 installed on the top wall inside the exhaust cabinet body 1. Both ends of the bidirectional motor 201 are splined with transmission rods. One end of the transmission rod is fixedly connected to a rotating rod 202. The lifting component 2 is used to adjust the height of the regulating door 3.

[0034] One end of the rotating rod 202 is fixedly connected to a storage shaft 203, and a lifting rope 204 is wound around the surface of the storage shaft 203. The lifting rope 204 facilitates the lifting of the adjustment door 3.

[0035] The exhaust assembly 7 includes an exhaust pipe 701 located on one side of the ventilation duct 6. A solenoid valve 702 is fixedly installed on the top surface of the exhaust pipe 701. The exhaust assembly 7 is designed to adjust the number of air vents.

[0036] A PLC controller 9 is fixedly installed on the upper edge of the front of the exhaust cabinet body 1. One side of the PLC controller 9 is electrically connected to the displacement sensor 4 and the servo motor 803 via power lines. Through the settings of the PLC controller 9, it plays an automatic control role.

[0037] A handle 10 is fixedly connected to the middle of the bottom outer side of the regulating door 3. The handle 10 is made of stainless steel. The handle 10 facilitates the pulling down of the regulating door 3.

[0038] The inner walls of the exhaust fan body 1 are provided with sliding grooves on both sides. The sliding grooves are adapted to both sides of the regulating door 3. The setting of the regulating door 3 plays the role of changing the opening area of ​​the exhaust fan.

[0039] In this invention, the working steps of the device are as follows:

[0040] First step: When in use, start the fan 802 and the bidirectional motor 201. The rotating rod 202 rotates, which retracts the lifting rope 204 and changes the height of the regulating door 3. When the displacement sensor 4 reaches the preset height threshold, the PLC controller 9 controls a certain group of solenoid valves 702 to open automatically. Then, according to the number of exhaust pipes 701 that are opened, the PLC controller 9 simultaneously controls the servo motor 803, which rotates the transmission rod and adjusts the regulating plate 804 so that the air volume can be adjusted according to the number of exhaust pipes 701.

[0041] The second step: After use, turn on the ultraviolet germicidal lamp 502. The ultraviolet germicidal lamp 502 emits ultraviolet light, which, after a certain period of irradiation, kills bacteria, viruses and other microorganisms in the air inside the exhaust cabinet body 1.

[0042] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0043] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable air volume regulating device for a laboratory fume hood, comprising a fume hood body (1), characterized in that: The inner top wall of the exhaust cabinet body (1) is provided with a lifting component (2), and the bottom end of the lifting component (2) is fixedly connected to an adjustment door (3). A displacement sensor (4) is fixedly installed in the middle of the inner side of the adjustment door (3). Several sets of sterilization components (5) are provided on both sides of the inner wall of the exhaust cabinet body (1). A ventilation duct (6) is provided on one side of the interior of the exhaust cabinet body (1). Several sets of exhaust components (7) are provided on one side of the ventilation duct (6). An air volume adjustment component (8) is fixedly connected to the top of the ventilation duct (6). The sterilization component (5) includes lamp covers (501) that are fixedly installed on both sides of the inner wall of the exhaust cabinet body (1), and an ultraviolet germicidal lamp (502) is fixedly installed inside the lamp cover (501). The air volume regulating component (8) includes a duct (801) fixedly connected to the top of the ventilation duct (6). A fan (802) is fixedly installed inside the duct (801). A servo motor (803) is fixedly installed on the upper side of one side of the duct (801). A transmission rod is splined to the output end of the servo motor (803). An adjusting plate (804) is fixedly connected to one end of the transmission rod.

2. The variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: The lifting assembly (2) includes a bidirectional motor (201) disposed on the inner top wall of the exhaust cabinet body (1). Both ends of the bidirectional motor (201) are splined connected to transmission rods, and one end of the transmission rod is fixedly connected to a rotating rod (202).

3. The variable air volume regulating device for a laboratory fume hood according to claim 2, characterized in that: One end of the rotating rod (202) is fixedly connected to a storage shaft (203), and a lifting rope (204) is wound around the surface of the storage shaft (203).

4. The variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: The exhaust assembly (7) includes an exhaust pipe (701) disposed on one side of the ventilation duct (6), and a solenoid valve (702) is fixedly installed on the top surface of the exhaust pipe (701).

5. The variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: A PLC controller (9) is fixedly installed on the upper edge of the front of the exhaust cabinet body (1). One side of the PLC controller (9) is electrically connected to the displacement sensor (4) and the servo motor (803) via power lines.

6. The variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: A handle (10) is fixedly connected to the middle of the bottom outer side of the regulating door (3), and the handle (10) is made of stainless steel.

7. The variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: The inner walls of the exhaust cabinet body (1) are provided with sliding grooves on both sides, and the sliding grooves are adapted to both sides of the regulating door (3).

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