Variable air volume adjusting system for ventilation cabinet

Abstract

The utility model relates to the technical field of fume hood equipment, in particular to a variable air volume adjusting system for a fume hood, which comprises a hood body, and two side walls of the hood body are respectively provided with an air inlet and an air outlet; the ventilation adjusting assembly comprises an air inlet adjusting plate fixedly connected to the air inlet, an air outlet adjusting plate is fixedly connected to the air outlet, the air inlet adjusting plate and the air outlet adjusting plate are each provided with two ventilation holes, and annular bearings are fixedly installed on the peripheral walls of the air inlet adjusting plate and the air outlet adjusting plate; the outer ring of each annular bearing is fixedly connected with a rotating frame, and the rotating frames are fixedly connected with adjusting baffles. The ventilation quantity can be adjusted in real time according to the heat condition in the cabinet body, so that the interior of the cabinet body can be always in a proper temperature condition, the storage condition of the ventilation cabinet can be ensured, and the ventilation efficiency of the ventilation cabinet can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of fume hood equipment, specifically to a variable air volume regulation system for fume hoods. Background Technology

[0002] Fume hoods are widely used equipment in laboratories and industrial production sites. They mainly consist of a cabinet and a ventilation system. The inside of a fume hood is a relatively enclosed space, while the ventilation system can promptly remove pollutants such as harmful gases, dust, and vapors from the cabinet to prevent them from contaminating the experimental or production environment and affecting the normal use of the laboratory or production site.

[0003] Existing technologies often have the following problems when used:

[0004] After being relatively enclosed for a long time, a certain amount of heat will accumulate inside the fume hood. This may cause the stored materials inside the fume hood to deteriorate under certain temperature conditions. However, the ventilation system of the fume hood is difficult to adjust the ventilation volume in real time according to the heat inside the cabinet. As a result, the heat cannot be discharged in time, and the inside of the fume hood cannot be in a relatively balanced and suitable temperature condition, which will affect the storage conditions and ventilation efficiency of the fume hood. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a variable air volume regulation system for fume hoods, which can effectively solve the problem that the ventilation system of fume hoods in the existing technology is difficult to adjust the ventilation volume in real time according to the heat inside the cabinet, so that the inside of the fume hood cannot be in a relatively balanced temperature condition, which affects the storage conditions of the fume hood and the emission rate of pollutants.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a variable air volume control system for fume hoods, comprising:

[0008] The cabinet has an air inlet and an air outlet on two side walls, respectively.

[0009] A ventilation regulating assembly includes an air inlet regulating plate fixedly connected to the air inlet and an exhaust regulating plate fixedly connected to the air outlet. Both the air inlet and exhaust regulating plates have two ventilation holes. Ring bearings are fixedly installed on the outer periphery of both the air inlet and exhaust regulating plates. A rotating frame is fixedly connected to the outer ring of each ring bearing. An adjusting baffle is fixedly connected to the rotating frame. Two airflow regulating holes are provided on the adjusting baffle. An airflow regulating system is fixedly connected to the middle of the exhaust regulating plate. The airflow regulating system is used to adjust the airflow at the ventilation holes on the air inlet and exhaust regulating plates in real time. An adjusting drive component is fixedly connected to the outer periphery of each rotating frame. The adjusting drive component is used to drive the adjusting baffle to rotate relative to the air inlet and exhaust regulating plates.

[0010] Furthermore, the air volume regulation system includes a transfer bracket fixedly connected to the middle of the exhaust regulating plate, a multi-probe air volume sensor fixedly installed on the upper end face of the transfer bracket, a heat monitoring sensor fixedly installed on the inner wall of the cabinet, and the heat monitoring sensor electrically connected to the multi-probe air volume sensor.

[0011] Furthermore, the adjustment drive component includes a transmission gear ring fixedly connected to the outer peripheral wall of the rotating frame, a fixed bracket fixedly connected to the upper part of the inner wall of the cabinet, a stepper motor fixedly mounted on the fixed bracket, a transmission gear fixedly connected to the output end of the stepper motor, and the transmission gear meshing with the transmission gear ring.

[0012] Furthermore, the multi-probe airflow sensor, heat monitoring sensor, stepper motor, and external power supply are electrically connected together.

[0013] Furthermore, a rotating through hole is provided in the middle of the adjusting baffle near the exhaust regulating plate, and the rotating through hole matches the adapter bracket.

[0014] Furthermore, both the air inlet regulating plate and the air outlet regulating plate adopt a cylindrical structure, and a nylon filter screen is fixedly connected to the air inlet regulating plate.

[0015] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0016] This invention incorporates a ventilation adjustment component. By driving an adjustment baffle to rotate relative to the air inlet and exhaust adjustment plates at a certain angle, the airflow adjustment holes can correspond to or be misaligned with the ventilation holes, thereby adjusting the opening of the ventilation holes and regulating the airflow at the ventilation holes. Simultaneously, a heat monitoring sensor can monitor the internal temperature conditions of the cabinet in real time, and a multi-probe airflow sensor can monitor the ventilation volume at the ventilation holes on the exhaust adjustment plate. By using the heat monitoring sensor and the multi-probe airflow sensor in conjunction to control the airflow at the ventilation holes on the air inlet and exhaust adjustment plates, the ventilation volume can be adjusted in real time according to the internal heat conditions of the cabinet, ensuring that the internal temperature of the cabinet remains at a suitable level. This guarantees the storage conditions of the fume hood and helps improve its ventilation efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the cabinet in this utility model;

[0020] Figure 3 This is an exploded view of the exhaust regulating plate and regulating baffle of this utility model;

[0021] Reference numerals: 1. Cabinet; 2. Air inlet regulating plate; 3. Air outlet regulating plate; 4. Ventilation hole; 5. Ring bearing; 6. Rotating frame; 7. Adjusting baffle; 8. Air volume regulating hole; 9. Adapter bracket; 10. Multi-probe air volume sensor; 11. Heat monitoring sensor; 12. Transmission gear ring; 13. Fixed bracket; 14. Stepper motor; 15. Transmission gear; 16. Rotating perforation; 17. Nylon filter. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Example: Refer to Figures 1 to 3 A variable air volume (VAV) regulating system for a fume hood includes: a hood body 1 and a ventilation regulating component. The hood body 1 has an air inlet and an air outlet on two side walls, respectively. The ventilation regulating component includes an air inlet regulating plate 2 fixedly connected to the air inlet and an exhaust regulating plate 3 fixedly connected to the exhaust outlet. Both the air inlet regulating plate 2 and the exhaust regulating plate 3 have a cylindrical structure. A nylon filter 17 is fixedly connected to the air inlet regulating plate 2. Both the air inlet regulating plate 2 and the exhaust regulating plate 3 have two ventilation holes 4. Ring bearings are fixedly installed on the outer peripheral walls of both the air inlet regulating plate 2 and the exhaust regulating plate 3. 5. Each ring bearing 5 has a rotating frame 6 fixedly connected to its outer ring. Each rotating frame 6 has an adjusting drive component fixedly connected to its outer peripheral wall. The adjusting drive component is used to drive the adjusting baffle 7 to rotate relative to the air inlet adjusting plate 2 and the air outlet adjusting plate 3. The adjusting drive component includes a transmission gear ring 12 fixedly connected to the outer peripheral wall of the rotating frame 6. A fixed bracket 13 is fixedly connected to the upper position of the inner wall of the cabinet 1. A stepper motor 14 is fixedly installed on the fixed bracket 13. A transmission gear 15 is fixedly connected to the output end of the stepper motor 14. The transmission gear 15 meshes with the transmission gear ring 12.

[0025] The stepper motor 14 drives the transmission gear 15 to rotate. The meshing transmission of the transmission gear 15 and the transmission ring 12 drives the rotating frame 6 to rotate, so that the adjusting baffle 7 can rotate a certain angle relative to the air inlet adjusting plate 2 and the air outlet adjusting plate 3. This allows the air volume adjusting hole 8 on the adjusting baffle 7 to correspond to or be misaligned with the ventilation hole 4 on the air inlet adjusting plate 2 and the air outlet adjusting plate 3, so as to adjust the opening of the ventilation hole 4 and realize the air volume adjustment at the ventilation hole 4.

[0026] Reference Figures 1 to 3 An adjusting baffle 7 is fixedly connected to the rotating frame 6. Two air volume adjusting holes 8 are opened on the adjusting baffle 7. An air volume adjusting system is fixedly connected to the middle of the exhaust adjusting plate 3. The air volume adjusting system is used to adjust the air volume at the ventilation holes 4 on the air inlet adjusting plate 2 and the exhaust adjusting plate 3 in real time. The air volume adjusting system includes a transfer bracket 9 fixedly connected to the middle of the exhaust adjusting plate 3. A rotating through hole 16 is opened in the middle of the adjusting baffle 7 near the exhaust adjusting plate 3. The rotating through hole 16 matches the transfer bracket 9. A multi-probe air volume sensor 10 is fixedly installed on the upper end face of the transfer bracket 9. A heat monitoring sensor 11 is fixedly installed on the inner wall of the cabinet 1. The heat monitoring sensor 11 is electrically connected to the multi-probe air volume sensor 10. The multi-probe air volume sensor 10, the heat monitoring sensor 11, the stepper motor 14 and the external power supply are connected to form a unit.

[0027] The heat monitoring sensor 11 has a built-in signal controller, and the multi-probe air volume sensor 10 has a built-in signal transmitter. The multi-probe air volume sensor 10 can convert the air volume at the monitored ventilation hole 4 into a digital signal and transmit it to the heat monitoring sensor 11. The heat monitoring sensor 11 can then use the signal controller to transmit control signals to the stepper motor 14 to control the operation of the stepper motor 14.

[0028] The internal temperature of the cabinet 1 is monitored in real time by a heat monitoring sensor 11, and the ventilation volume at the ventilation hole 4 on the exhaust regulating plate 3 is monitored by a multi-probe air volume sensor 10. The heat monitoring sensor 11 and the multi-probe air volume sensor 10 can be used to control the operation of the stepper motor 14, thereby controlling the opening of the ventilation hole 4 on the air inlet regulating plate 2 and the air outlet regulating plate 3. This allows for real-time adjustment of the ventilation volume based on the internal heat of the cabinet 1, ensuring that the interior of the cabinet 1 is always at a suitable temperature. This guarantees the storage conditions of the fume hood and helps improve its ventilation efficiency.

[0029] The working principle of this utility model is as follows:

[0030] In use, if it is necessary to adjust the opening of the ventilation hole 4, the stepper motor 14 can be started. The stepper motor 14 drives the transmission gear 15 to rotate. The meshing transmission of the transmission gear 15 and the transmission gear ring 12 drives the rotating frame 6 to rotate, so that the adjusting baffle 7 can rotate a certain angle relative to the air inlet adjusting plate 2 and the air outlet adjusting plate 3. This allows the air volume adjusting hole 8 on the adjusting baffle 7 to correspond to or be misaligned with the ventilation hole 4 on the air inlet adjusting plate 2 and the air outlet adjusting plate 3, so as to adjust the opening of the ventilation hole 4 and realize the air volume adjustment at the ventilation hole 4.

[0031] During the airflow adjustment at the ventilation holes 4, the internal temperature of the cabinet 1 can be monitored in real time by the heat monitoring sensor 11, and the ventilation volume at the ventilation holes 4 on the exhaust regulating plate 3 can be monitored by the multi-probe airflow sensor 10. The heat monitoring sensor 11 and the multi-probe airflow sensor 10 can be used to control the operation of the stepper motor 14, thereby controlling the opening of the ventilation holes 4 on the air inlet regulating plate 2 and the air outlet regulating plate 3. This allows for real-time adjustment of the ventilation volume based on the internal heat of the cabinet 1, ensuring that the interior of the cabinet 1 is always at a suitable temperature. This guarantees the storage conditions of the fume hood and helps improve its ventilation efficiency.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A variable air volume control system for fume hoods, characterized in that, include: Cabinet (1), wherein two side walls of the cabinet (1) are respectively provided with an air inlet and an air outlet; The ventilation adjustment assembly includes an air inlet adjustment plate (2) fixedly connected to the air inlet and an exhaust adjustment plate (3) fixedly connected to the air outlet. Both the air inlet adjustment plate (2) and the exhaust adjustment plate (3) have two ventilation holes (4). Both the air inlet adjustment plate (2) and the exhaust adjustment plate (3) have annular bearings (5) fixedly installed on their outer peripheral walls. Each annular bearing (5) has a rotating frame (6) fixedly connected to its outer ring. The rotating frame (6) has an adjustment baffle (7) fixedly connected to its outer ring. The adjustment baffle (7) has two air volume adjustment holes (8). The exhaust adjustment plate (3) has an air volume adjustment system fixedly connected to its middle section. The air volume adjustment system is used to adjust the air volume at the ventilation holes (4) on the air inlet adjustment plate (2) and the exhaust adjustment plate (3) in real time. Each rotating frame (6) has an adjustment drive component fixedly connected to its outer peripheral wall. The adjustment drive component is used to drive the adjustment baffle (7) to rotate relative to the air inlet adjustment plate (2) and the exhaust adjustment plate (3).

2. The variable air volume control system for a fume hood according to claim 1, characterized in that, The air volume regulation system includes a transfer bracket (9) fixedly connected to the middle of the exhaust regulating plate (3). A multi-probe air volume sensor (10) is fixedly installed on the upper end face of the transfer bracket (9). A heat monitoring sensor (11) is fixedly installed on the inner wall of the cabinet (1). The heat monitoring sensor (11) is electrically connected to the multi-probe air volume sensor (10).

3. The variable air volume control system for a fume hood according to claim 2, characterized in that, The adjustment drive component includes a transmission gear ring (12) fixedly connected to the outer peripheral wall of the rotating frame (6), a fixed bracket (13) fixedly connected to the upper part of the inner wall of the cabinet (1), a stepper motor (14) fixedly installed on the fixed bracket (13), a transmission gear (15) fixedly connected to the output end of the stepper motor (14), and the transmission gear (15) meshing with the transmission gear ring (12).

4. The variable air volume control system for a fume hood according to claim 3, characterized in that, The multi-probe airflow sensor (10), heat monitoring sensor (11), stepper motor (14) are electrically connected to an external power supply.

5. A variable air volume control system for a fume hood according to claim 2, characterized in that, A rotating through hole (16) is provided in the middle of the adjusting baffle (7) near the exhaust regulating plate (3), and the rotating through hole (16) matches the adapter bracket (9).

6. The variable air volume control system for a fume hood according to claim 1, characterized in that, Both the air inlet regulating plate (2) and the air outlet regulating plate (3) adopt a cylindrical structure, and a nylon filter (17) is fixedly connected to the air inlet regulating plate (2).

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