A fume hood with adjustable ventilation effect

Abstract

The utility model discloses a ventilation cabinet of adjustable ventilation effect, include: cabinet main body shell, the top of cabinet main body shell inner chamber installs the wind collecting cover, the both sides of wind collecting cover bottom all are established with the circular air inlet, be provided with the first disc and the second disc of upper and lower stacking in the wind collecting cover, be provided with the ventilation groove of azimuth reverse on the first disc and the second disc, the utility model discloses through to the first disc and the second disc independent drive, the first disc and the second disc on the ventilation groove's intercommunication position are changed conveniently, thereby adjusting the ventilation area, then the first disc and the second disc independent lift, can open the ventilation groove and air inlet, further adjust the ventilation area, thereby the smoke suction speed is adjusted and controlled, avoid the frequent speed change rotation of exhaust fan subassembly, reduce the service life of exhaust fan subassembly, then through different combination, the different exhaust mode is collocated, and different exhaust effect is realized further.

Description

Technical Field

[0001] This utility model relates to the field of ventilation mode technology, specifically a fume hood with adjustable ventilation effect. Background Technology

[0002] Ventilation mode refers to the way to improve the indoor environment by organizing air flow. Traditional fume hoods adjust the exhaust volume by changing the speed of the exhaust fan, which is used to adjust the exhaust effect of the fume hood.

[0003] When operating a fume hood, different ventilation modes are required to exhaust smoke depending on the object being operated on. However, traditional fume hoods have a limited number of ventilation modes, which cannot meet the different exhaust needs. In addition, the frequent switching of exhaust fan power can easily shorten the lifespan of the exhaust fan. Utility Model Content

[0004] The purpose of this invention is to provide a fume hood with adjustable ventilation effect. By driving the ventilation slots in opposite directions to rotate through the first and second discs, the connected area of ​​the upper and lower sets of ventilation slots can be changed, thereby facilitating the extraction of smoke from different positions. At the same time, the upward movement of the first and second discs opens the ventilation slots and air inlets, increasing the area of ​​the air inlet. Different combinations can achieve different ventilation modes and different ventilation effects, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fume hood with adjustable ventilation effect, comprising:

[0006] Cabinet main body shell;

[0007] The top of the inner cavity of the cabinet body is equipped with an air-gathering hood. Circular air inlets are opened on both sides of the bottom of the air-gathering hood. The air-gathering hood is equipped with a first disc and a second disc stacked on top of each other. The first disc and the second disc are provided with ventilation slots in opposite directions. The air-gathering hood is equipped with a lifting component for raising and lowering the first disc and the second disc. The lifting component is also equipped with a rotary drive component for rotating the first disc and the second disc to adjust the position of the ventilation slots.

[0008] Two sets of exhaust fan assemblies are installed on the top of the main body shell of the cabinet.

[0009] Preferably, the lifting assembly includes a mounting base fixed to the top of the inner cavity of the wind-gathering hood. A fixed shaft and a fixed cylinder are respectively fixed at the center of the top of the first disc and the second disc. The fixed shaft passes through the second disc and the fixed cylinder and extends upward. A fixed sleeve is fixed to the upper end of the outer side of the fixed cylinder and the fixed shaft. A support base is rotatably connected to the outer side of the fixed sleeve. Two sets of electric push rods connected to the support base are fixed to the bottom of the mounting base.

[0010] Preferably, the rotary drive assembly includes a drive motor fixed to the top of the support base, the output shaft of the drive motor passing through the support base and having a drive gear fixed thereon, and a driven gear meshing with the drive gear fixed to the outside of the fixed cylinder and the fixed shaft.

[0011] Preferably, a protective cover located outside the drive motor is fixed to the top of the support base, the piston rods of one set of electric actuators are fixedly connected to the top of the protective cover, and the piston rods of another set of electric actuators are fixedly connected to the other side of the top of the support base.

[0012] Preferably, a protective outer cylinder is fixed to the outside of the mounting base, and a protective inner cylinder is fixed to the top of the second disc, with the protective inner cylinder slidingly fitted into the inner cavity of the protective outer cylinder.

[0013] Preferably, a limiting ring is fixed to the lower end of the inner side of the air inlet, and the outer diameter of the first disk is the same as the inner diameter of the air inlet.

[0014] Preferably, an isolation plate is fixed to the inner side of the wind-gathering hood, and the isolation plate divides the inner cavity of the wind-gathering hood into two independent chambers, with the two sets of exhaust fan assemblies respectively connected to the two sets of chambers.

[0015] Preferably, a PLC controller is installed on the upper part of the front of the main body shell of the cabinet, and the PLC controller is electrically connected to the drive motor, the electric push rod and the exhaust fan assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model allows for independent driving of the first and second discs, facilitating changes in the connection position of the ventilation slots on the first and second discs, thereby adjusting the ventilation area. Subsequently, the first and second discs can be raised and lowered independently, opening the ventilation slots and air inlets, further adjusting the ventilation area, and thus controlling the smoke absorption speed. This avoids frequent speed changes in the exhaust fan assembly, which would reduce its lifespan. Furthermore, different combinations can be used to create different exhaust modes, thereby achieving different exhaust effects.

[0018] 2. This utility model isolates the lifting component and the rotary drive component by cooperating with the protective outer cylinder, thus preventing smoke from affecting the drive motor and electric push rod. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a cross-sectional three-dimensional structural diagram of the main body shell of the cabinet of this utility model;

[0021] Figure 3 This is a cross-sectional three-dimensional structural diagram of the wind-gathering cover of this utility model;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the first and second disks of this utility model.

[0024] Figure 6 This is a partially disassembled three-dimensional structural diagram of the lifting assembly and the rotation drive assembly of this utility model.

[0025] Numbered in the diagram: 1. Cabinet main body shell; 2. Air concentrator; 3. Air inlet; 4. First disc; 5. Second disc; 6. Ventilation slot; 7. Lifting assembly; 71. Mounting base; 72. Fixed shaft; 73. Fixed cylinder; 74. Fixed sleeve; 75. Support base; 76. Electric actuator; 8. Rotary drive assembly; 81. Drive motor; 82. Drive gear; 83. Driven gear; 9. Exhaust fan assembly; 10. Protective cover; 11. Protective outer cylinder; 12. Protective inner cylinder; 13. Limit ring; 14. Isolation plate; 15. PLC controller. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides, for example Figures 1-6 The fume hood shown has adjustable ventilation and includes:

[0028] Cabinet main body shell 1;

[0029] The top of the inner cavity of the cabinet body shell 1 is equipped with a wind concentrator 2. The bottom of the wind concentrator 2 has circular air inlets 3 on both sides. The wind concentrator 2 is equipped with a first disc 4 and a second disc 5 stacked on top of each other. The first disc 4 and the second disc 5 are equipped with ventilation slots 6 in opposite directions. The wind concentrator 2 is equipped with a lifting component 7 for raising and lowering the first disc 4 and the second disc 5. The lifting component 7 is also equipped with a rotation drive component 8 for rotating the first disc 4 and the second disc 5 to adjust the position of the ventilation slots 6.

[0030] Two sets of exhaust fan assemblies 9 are installed on the top of the main body shell 1 of the cabinet;

[0031] By independently driving the first disc 4 and the second disc 5, the connection position of the ventilation slots 6 on the first disc 4 and the second disc 5 can be easily changed, thereby adjusting the ventilation area. Subsequently, the first disc 4 and the second disc 5 can be raised and lowered independently, which can open the ventilation slots 6 and the air inlet 3, further adjusting the ventilation area, thereby controlling the smoke absorption speed, avoiding frequent speed changes of the exhaust fan assembly 9, and reducing the service life of the exhaust fan assembly 9. Then, by different combinations, different exhaust modes can be created, thereby achieving different exhaust effects.

[0032] Among them, such as Figure 3-6 As shown:

[0033] The lifting assembly 7 includes a mounting base 71 fixed to the top of the inner cavity of the wind concentrator 2. A fixed shaft 72 and a fixed cylinder 73 are fixed at the center of the top of the first disc 4 and the second disc 5, respectively. The fixed shaft 72 passes through the second disc 5 and the fixed cylinder 73 and extends upward. A fixed sleeve 74 is fixed to the upper end of the outer side of the fixed cylinder 73 and the fixed shaft 72. A support base 75 is rotatably connected to the outer side of the fixed sleeve 74. Two sets of electric actuators 76 connected to the support base 75 are fixed to the bottom of the mounting base 71. The support base 75 is raised and lowered by the two sets of electric actuators 76. Then, the support base 75 moves the fixed shaft 72 and the fixed cylinder 73 in conjunction with the fixed sleeve 74, thereby raising and lowering the first disc 4 and the second disc 5 and controlling the position of the wind concentrator 2, the first disc 4 and the second disc 5.

[0034] Furthermore, such as Figure 6 As shown:

[0035] The rotary drive assembly 8 includes a drive motor 81 fixed to the top of the support base 75. The output shaft of the drive motor 81 passes through the support base 75 and is fixed with a drive gear 82. A driven gear 83 that meshes with the drive gear 82 is fixed to the outside of the fixed cylinder 73 and the fixed shaft 72. The drive motor 81, mounted on the support base 75, drives the drive gear 82 to rotate, and then the driven gear 83 drives the fixed shaft 72 and the fixed cylinder 73. Thus, the first disk 4 and the second disk 5 can be rotated independently to control the position of the ventilation slots 6 on the first disk 4 and the second disk 5.

[0036] Preferred, such as Figure 6 As shown:

[0037] A protective cover 10 located outside the drive motor 81 is fixed to the top of the support base 75. The piston rods of one set of electric push rods 76 are fixedly connected to the top of the protective cover 10, and the piston rods of another set of electric push rods 76 are fixedly connected to the other side of the top of the support base 75. With the cooperation of the protective cover 10, the drive motor 81 is easily protected. At the same time, in order to ensure that the two sets of electric push rods 76 exert force evenly on the support base 75, the support base 75 is prevented from tilting or shaking.

[0038] It is worth noting that, such as Figure 3 As shown:

[0039] A protective outer cylinder 11 is fixed to the outside of the mounting base 71, and a protective inner cylinder 12 is fixed to the top of the second disc 5. The protective inner cylinder 12 slides and fits into the inner cavity of the protective outer cylinder 11. Through the cooperation of the protective outer cylinder 11, the lifting assembly 7 and the rotary drive assembly 8 are isolated to prevent smoke from affecting the drive motor 81 and the electric push rod 76.

[0040] In a further preferred embodiment, such as Figure 3 As shown:

[0041] A limiting ring 13 is fixed at the lower end of the inner side of the air inlet 3. The outer diameter of the first disc 4 is the same as the inner diameter of the air inlet 3. The limiting ring 13 is used to limit the first disc 4, so that the first disc 4 does not shake after entering the ventilation slot 6, which would cause a large gap between the first disc 4 and the ventilation slot 6, and easily cause the smoke in the wind hood 2 to diffuse outward.

[0042] In addition, such as Figure 3 As shown:

[0043] An isolation plate 14 is fixed inside the wind concentrator hood 2. The isolation plate 14 divides the inner cavity of the wind concentrator hood 2 into two independent chambers. Two sets of exhaust fan assemblies 9 are connected to the two sets of chambers respectively. By setting the isolation plate, it is convenient to divide the inside of the wind concentrator hood 2 into two independent chambers. Then, the two sets of exhaust fan assemblies 9 are used for independent control to realize local exhaust operation.

[0044] In this embodiment, as Figure 1 As shown:

[0045] A PLC controller 15 is installed on the upper part of the front of the main body shell 1 of the cabinet. The PLC controller 15 is electrically connected to the drive motor 81, the electric push rod 76 and the exhaust fan assembly 9. Through the settings of the PLC controller 15, the drive motor 81, the electric push rod 76 and the exhaust fan can be precisely controlled to realize different exhaust modes, thereby adjusting the ventilation effect and adapting to different exhaust needs.

[0046] In practical use, when the PLC controller 15 controls the drive motor 81 to rotate the first disk 4 or the second disk 5, the drive motor 81 drives the drive gear 82 to rotate. The drive gear 82 drives the fixed cylinder 73 or the fixed shaft 72 to rotate through the driven gear 83. Then, the fixed cylinder 73 or the fixed shaft 72 drives the second disk 5 or the first disk 4 to rotate. The first disk 4 and the second disk 5 rotate relative to each other. During the rotation, the ventilation slots 6 on the first disk 4 and the second disk 5 are partially connected, and the position of the connected area changes continuously with the rotation, thereby controlling the actual ventilation opening position of the ventilation slots 6. By utilizing the different distribution of ventilation openings, smoke is discharged to different degrees. Subsequently, the electric actuator 76 drives the support base 75 to move upward, and then the fixed shaft 72 and the fixed cylinder 73 move upward with the cooperation of the fixed sleeve 74. When the second disc 5 separates from the first disc 4, the ventilation slot 6 is fully opened, increasing the actual ventilation area of ​​the ventilation slot 6. When the first disc 4 and the second disc 5 move upward synchronously from the air inlet 3, the air inlet 3 is fully opened, allowing the smoke to be quickly sucked in through the air inlet 3. By controlling different ventilation areas, the two sets of exhaust fan assemblies 9 can be independently controlled, allowing the chamber on one side to exhaust the smoke below. By programming multiple situations through the PLC controller 15, different exhaust modes can be formed, thereby achieving different exhaust effects.

[0047] The ventilation effect is related to the size of the ventilation path and the power of the fan. In this application, different ventilation mode combinations are achieved by controlling the size of the ventilation path cross-section and adjusting the fan power to achieve different ventilation effects.

[0048] 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 fume hood with adjustable ventilation effect, characterized in that, include: Cabinet body shell (1); A concentrator (2) is installed on the top of the inner cavity of the cabinet body shell (1). Circular air inlets (3) are opened on both sides of the bottom of the concentrator (2). A first disc (4) and a second disc (5) are stacked on top of each other in the concentrator (2). Ventilation slots (6) with opposite orientations are opened on the first disc (4) and the second disc (5). A lifting assembly (7) for adjusting the height of the first disc (4) and the second disc (5) is provided in the concentrator (2). A rotation drive assembly (8) for rotating the first disc (4) and the second disc (5) to adjust the position of the ventilation slots (6) is also provided on the lifting assembly (7). Two sets of exhaust fan assemblies (9) are installed on the top of the main body shell (1) of the cabinet.

2. The fume hood with adjustable ventilation effect according to claim 1, characterized in that: The lifting assembly (7) includes a mounting base (71) fixed to the top of the inner cavity of the wind shroud (2). A fixed shaft (72) and a fixed cylinder (73) are fixed at the center of the top of the first disc (4) and the second disc (5), respectively. The fixed shaft (72) passes through the second disc (5) and the fixed cylinder (73) and extends upward. A fixed sleeve (74) is fixed to the upper end of the outer side of the fixed cylinder (73) and the fixed shaft (72). A support base (75) is rotatably connected to the outer side of the fixed sleeve (74). Two sets of electric push rods (76) connected to the support base (75) are fixed to the bottom of the mounting base (71).

3. The fume hood with adjustable ventilation effect according to claim 2, characterized in that: The rotary drive assembly (8) includes a drive motor (81) fixed on the top of the support base (75). The output shaft of the drive motor (81) passes through the support base (75) and is fixed with a drive gear (82). A driven gear (83) that meshes with the drive gear (82) is fixed on the outside of the fixed cylinder (73) and the fixed shaft (72).

4. A fume hood with adjustable ventilation effect according to claim 2, characterized in that: The top of the support base (75) is fixed with a protective cover (10) located outside the drive motor (81). The piston rods of one set of electric push rods (76) are fixedly connected to the top of the protective cover (10), and the piston rods of another set of electric push rods (76) are fixedly connected to the other side of the top of the support base (75).

5. A fume hood with adjustable ventilation effect according to claim 2, characterized in that: The outer side of the mounting base (71) is fixed with a protective outer cylinder (11), and the top of the second disc (5) is fixed with a protective inner cylinder (12). The protective inner cylinder (12) slides and fits into the inner cavity of the protective outer cylinder (11).

6. A fume hood with adjustable ventilation effect according to claim 1, characterized in that: A limit ring (13) is fixed at the lower end of the inner side of the air inlet (3), and the outer diameter of the first disk (4) is the same as the inner diameter of the air inlet (3).

7. A fume hood with adjustable ventilation effect according to claim 1, characterized in that: An isolation plate (14) is fixed to the inner side of the wind-gathering hood (2). The isolation plate (14) divides the inner cavity of the wind-gathering hood (2) into two independent chambers. The two sets of exhaust fan assemblies (9) are respectively connected to the two sets of chambers.

8. A fume hood with adjustable ventilation effect according to claim 1, characterized in that: A PLC controller (15) is installed on the upper front of the main body shell (1) of the cabinet. The PLC controller (15) is electrically connected to the drive motor (81), the electric push rod (76) and the exhaust fan assembly (9).

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