Auxiliary flow guide device of fume hood
By designing multiple flow guides and adjustable flow guides in the fume hood, the problems of uneven wind speed and unbalanced air pressure in the prior art are solved, and the smooth operation of air flow and the experimental safety improvement are achieved.
Patent Information
- Application Number
- CN202420805423.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The wind speed of the auxiliary diversion device of the existing fume hood is uneven and it is difficult to balance the air pressure, which causes the exhaust and air replenishment operations to interfere with each other, affecting the safety of the experiment.
A fume hood auxiliary diversion device including air inlet and exhaust is designed. Through the arrangement of multiple diversion members and an adjustable upper diversion plate, the air flow can be ensured to smoothly operate, avoid air flow hedging and turbulence, and pass through the side. Air replenishment devices and fixed flow guides optimize airflow distribution.
The airflow and uniform wind speed in the operating room are achieved, which avoids harmful gases overflow, and enhances the experimental safety and the working efficiency of the fume hood.
Smart Images
Figure CN222220659U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fume hoods, in particular to an auxiliary flow guiding device for a fume hood. Background Art
[0002] In order to prevent pollutants such as vapor, gas and particles (smoke, soot, dust and aerosol) from being absorbed by the experimenters during the experiment, fume hoods, fume hoods or local ventilation are usually required to ensure the safety of laboratory ventilation design.
[0003] In the prior art, laboratory fume hoods install an exhaust fan in the inner cavity of the air collecting hood to extract the air in the laboratory and release it to the outside. However, extracting air will cause air pressure imbalance, which is not conducive to the work of the experimenter. Therefore, in order to ensure the air pressure balance, the air supply device is started to replenish air, thereby forming a stable circulation in the fume hood. However, when the exhaust and replenishing air work at the same time, the exhaust part has poor ability to capture harmful substances and cannot absorb and remove pollution well. Therefore, a guide plate is added to guide the exhaust and replenishing air. However, the wind speed of the existing guide plate is uneven and cannot be adjusted, which easily causes interference in the air ducts under the conditions of exhaust and replenishing air, which is not conducive to experimental operation. Utility Model Content
[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of inconvenient auxiliary flow diversion in the prior art, thereby providing a fume hood auxiliary flow diversion device.
[0005] The above technical objectives of the utility model are achieved through the following technical solutions:
[0006] An auxiliary flow guide device for a fume hood comprises a cabinet body, wherein the cabinet body comprises an operating room and a compartment cabinet, wherein the compartment cabinet is arranged below the operating room, an operating opening is opened at the front side of the operating room, and a glass window is arranged on the operating opening, and further comprises:
[0007] An air inlet member, the air inlet member is arranged on one side of the operating room near the glass window, the air inlet member comprises an upper air inlet device and two side air supply devices, the upper air inlet device is arranged on the top of the operating room and connected to the air supply fan arranged on the top of the operating room, the side air supply devices are arranged on two opposite sides of the operating room near the glass window, and the tops of the side air supply devices are also connected to the air supply fan;
[0008] An air exhaust member, wherein the air exhaust member is arranged on a side of the operating room away from the glass window, and the air exhaust member includes a first air guide member, a second air guide member and a fixed air guide member which are arranged in sequence from top to bottom, the first air guide member being arranged obliquely relative to the operating room, the top of the first air guide member being close to the upper air inlet device and the bottom being arranged away from the glass window, the second air guide member being arranged obliquely relative to the operating room and the distance between the top of the second air guide member and the rear inner wall of the operating room being smaller than the distance between the bottom of the second air guide member and the rear inner wall of the operating room, the fixed air guide member being arranged vertically in the operating room, and the distance between the fixed air guide member and the rear inner wall of the operating room being smaller than the distance between the bottom of the second air guide member and the rear inner wall of the operating room.
[0009] By adopting the above technical scheme, a balanced air pressure environment of the air inlet and exhaust parts is formed in the operating room. During the experimental operation, air is supplied from the top and the front side wall, and the harmful substances generated by the experiment are led out of the operating room by the exhaust parts. The air supply and exhaust operations do not interfere with each other, and the air flow is smoother and gentler through the arrangement of multiple guide parts. It can run smoothly and flow, avoid air flow collision and reduce the generation of turbulence, and also avoid the overflow of harmful gases, so that the wind speed in the operating room is more uniform, ensuring the safety of the experimenters.
[0010] Furthermore, the upper air inlet device includes a partition plate, an upper lining plate and an upper guide plate, the partition plate and the upper lining plate are integrally connected, the partition plate extends vertically below the top of the operating room and is parallel to the front side of the operating room, the partition plate and the upper lining plate are perpendicular to each other and are arranged on the side close to the glass window, the upper lining plate is hingedly provided with an upper guide plate at one end away from the partition plate, the upper guide plate is vertically arranged in the operating room and leaves a gap with the front inner side of the operating room.
[0011] By adopting the above technical scheme, the upper air inlet device guides the supplementary air flow into the operating room, and the air flow is evenly dispersed through the guiding operation of the upper guide plate to avoid the situation where the air supply position does not pass through the air. The upper air inlet device is also set to prevent the gas in the operating room from drifting and overflowing near the glass window, affecting the safety of the experimenter. The upper guide plate is set to effectively improve the utilization rate of the supplementary air flow and can fully introduce it into the bottom of the operating room, so that harmful substances can be completely sucked out from the bottom of the exhaust part.
[0012] Furthermore, the two opposite side walls of the upper guide plate are slidingly connected to the inner wall of the operating chamber, the two opposite side walls of the bottom of the upper guide plate are provided with arc-shaped rotation grooves, the inner wall of the operating chamber is extended with an arc-shaped rotation bar corresponding to the rotation groove, and a handle is provided along the length direction of the bottom of the upper guide plate.
[0013] By adopting the above technical solution, the gap between the upper guide plate and the front side wall of the operating room is adjustable, so that the size of the air outlet can be controlled, and the air supply range can be manually operated according to the experimental content, and the adjustment operation is convenient; preventing the air supply airflow from forming turbulence on the upper part of the glass window and affecting other guide structures.
[0014] Furthermore, each of the side air supply devices includes an air supply frame, an air supply plate and a toggle plate. The air supply frame is arranged along the height of the operating room and at a corner of the operating room. The air supply frame and the two side walls adjacent to the operating room form an air supply groove. The air supply frame is provided with an air supply port along its length direction. The air supply port is arranged close to the bottom of the air supply frame and its length is less than half of the length of the air supply frame. The air supply plate is positioned and rotatably installed in the air supply groove and the rotation axis is perpendicular to the bottom surface of the operating room. The toggle plate is extended and fixed on the air supply plate and extends to the side close to the glass window.
[0015] By adopting the above technical solution, the side air supply device supplies air to the operating room through the air supply port on the air supply frame. The air supply port is arranged close to the inside of the operating room to reduce the problem of air leakage. The toggle plate can adjust the size of the air supply port, thereby adjusting the side air supply volume. The side air supply structure can be closed when necessary.
[0016] Furthermore, the top of the first guide member is hinged to the bottom of the partition plate, and the hinge axis is set on the side of the partition plate away from the upper lining plate. The first guide member includes a first guide plate, a first adjustment and a first limit member. The first adjustment is set at two opposite ends of the top of the first guide plate. The first adjustment includes a driving gear and a driven gear that are meshed with each other. The driving gear is set above the driven gear, and the driven gear is sleeved on the hinge axis at the top of the first guide plate. The first limit member is set on two opposite sides of the bottom of the first guide plate. The first limit member includes a first limit column and an arc-shaped limit groove opened on the inner wall of the operating chamber.
[0017] By adopting the above technical solution, the driving gear rotates to drive the driven gear to rotate, thereby controlling the first guide plate coaxial with the driven gear to swing, driving the first guide plate to adjust the ventilation gap at the bottom, controlling the size of the exhaust gap there, and thus controlling the exhaust force there.
[0018] Furthermore, the second air guide member is arranged on a side of the first air guide member away from the upper air inlet device and the top height of the second air guide member is higher than the bottom height of the first air guide member. The second air guide member includes a second air guide plate and a second adjustment. The second adjustment is connected to the second air guide plate by a ball joint and is arranged on the rear side of the second air guide plate near the four corners. The second adjustment includes two upper adjustment members and two lower adjustment members. The upper adjustment members have the same structure as the lower adjustment members and the length of the upper adjustment members is less than the length of the lower adjustment members. The upper adjustment members and the lower adjustment members both include an adjustment rod and an adjustment seat. The adjustment rod is threadedly installed in the adjustment seat, and the axis of the adjustment rod is arranged perpendicular to the rear side of the operating room.
[0019] By adopting the above technical solution, the adjustment rod rotates to drive the adjustment seat to slide. The adjustment seat is provided with limit strips at the top and bottom. The limit strips are fixed on the inner wall of the operating room. Now the adjustment seat can only slide forward and backward. The upper adjustment part and the lower adjustment part are controlled separately. The upper and lower positions are adjusted accordingly according to the needs to control the ventilation gap of the second guide plate and adjust the exhaust force.
[0020] Furthermore, the fixed guide member is arranged on a side of the second guide member away from the upper air inlet device and the top height of the fixed guide member is higher than the bottom height of the second guide member. The fixed guide member includes a fixed guide plate and a plurality of fixing bolts. A plurality of guide holes are provided on the fixed guide plate. The fixing bolts pass through the fixed guide plate and are fixed to the inner wall of the operating room.
[0021] By adopting the above technical solution, the guide holes conform to the aerodynamic design and are irregularly arranged, which can reduce the average surface wind speed required for containment, reduce the resistance of the airflow entering the fixed guide plate, enhance the containment ability of the fixed guide plate, reduce turbulence, and reduce the overflow of toxic and harmful gases.
[0022] Furthermore, a buffer plate is extended upward from the end of the fixed guide plate, and the buffer plate is arranged obliquely with the fixed guide plate. A C-shaped protective sleeve is sleeved on the fixing bolt, and the opening of the protective sleeve is arranged upward.
[0023] By adopting the above technical solution, the buffer plate is conducive to improving the guide effect, making the airflow pass smoothly and stably; a protective cover is provided to protect the fixing bolts to prevent the fixing bolts from being corroded by harmful substances and causing breakage, thereby preventing the fixed guide plate from falling off, thereby ensuring the safety of experimental operations and improving the stability of the fixing parts.
[0024] In summary, the technical solution of the utility model has the following advantages:
[0025] 1. The auxiliary flow guiding device of the fume hood provided by the utility model forms a balanced air pressure environment of the air inlet and the exhaust parts in the operating room. During the experimental operation, air is supplied from the top and the front side wall, and the harmful substances generated by the experiment are led out of the operating room by the exhaust parts. The air supply and exhaust operations do not interfere with each other, and the airflow is smoother and gentler through the arrangement of multiple flow guiding parts, which can run smoothly and circulate, avoid airflow collision and reduce the generation of turbulence, and also avoid the overflow of harmful gases, so that the wind speed in the operating room is more uniform, ensuring the safety of the experimenters.
[0026] 2. The auxiliary flow guide device of the fume hood provided by the utility model is provided with an air inlet and is located behind the glass window, which can balance the pressure difference between the inside and outside of the fume hood, and the air supply position is relatively lower, which can effectively remove the gas with large viscous resistance trapped on the operating table, improve the absorption and removal effect of harmful gases, and ensure the working efficiency of the fume hood.
[0027] 3. The auxiliary flow guide device of the fume hood provided by the utility model is provided with flow guide gaps of different heights formed by multiple flow guide components, so that the gases at different heights in the operating room inside the fume hood can smoothly enter the exhaust gap in a unidirectional horizontal flow manner from the nearest flow guide gap, reducing the upper and lower mixing of gases at different heights, avoiding the generation of vortexes, and ensuring smooth exhaust; the exhaust gap decreases from bottom to top, which can not only ensure the airflow into the exhaust gap but also reduce the overflow of gas in the gap, thereby ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 This is a schematic diagram of the overall structure of an auxiliary flow guide device for a fume hood provided in one embodiment of the utility model;
[0030] Figure 2 A longitudinal cross-sectional view of a cabinet provided in one embodiment of the utility model;
[0031] Figure 3 A schematic diagram of the internal structure of an operating room provided in one embodiment of the utility model;
[0032] Figure 4 It is a schematic diagram of the partial cross-sectional structure of a side air supply member provided in one embodiment of the utility model.
[0033] Description of reference numerals:
[0034] 1. Cabinet; 11. Operation room; 111. Operation port; 112. Glass window; 113. Air supply fan; 114. Rotation bar; 12. Grid cabinet; 2. Air inlet; 3. Upper air inlet device; 31. Partition plate; 32. Upper lining plate; 33. Upper guide plate; 331. Rotation slot; 332. Handle; 4. Side air supply device; 41. Air supply rack; 411. Air supply slot; 412. Air supply port; 42. Air supply plate; 43. Toggle plate; 5. Air exhaust; 6. First guide member; 61. First Guide plate; 62, first adjustment; 621, driving gear; 622, driven gear; 63, first limit piece; 631, first limit column; 632, limit groove; 7, second guide piece; 71, second guide plate; 72, second adjustment; 721, upper adjustment piece; 722, lower adjustment piece; 7221, adjustment rod; 7222, adjustment seat; 8, fixed guide piece; 81, fixed guide plate; 811, guide hole; 812, buffer plate; 82, fixing bolt; 821, protective cover. DETAILED DESCRIPTION
[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0036] A fume hood auxiliary guide device, such as Figure 1 and Figure 2As shown, the cabinet 1 includes a cabinet body 1, which includes an operating room 11 and a compartment 12. The compartment 12 is arranged below the operating room 11. An operating port 111 is opened on the front side of the operating room 11. A glass window 112 is arranged on the operating port 111. The glass window 112 includes a fixed window and a sliding window. It also includes an air inlet 2 and an air exhaust 5. An air supply fan 113 is arranged above the air inlet 2. An air collecting hood is arranged above the air exhaust 5. The air collecting hood is also connected to an exhaust fan (not shown in the figure). The air inlet 2 is arranged in the operating room 11 near the side of the glass window 112. The air inlet 2 includes an upper air inlet device 3 and two side air supply devices 4. The upper air inlet device 3 is arranged at the top of the operating room 11 and is connected to the air supply fan 113 arranged at the top outside the operating room 11. The side air supply devices 4 are arranged on the opposite sides of the operating room 11 near the glass window 112. The top of the side air supply device 4 is also connected to the air supply fan 113. The air extraction member 5 is arranged in the operating room 11 at a side away from the glass window 112. The air extraction member 5 includes a first air guide member 6, a second air guide member 7 and a fixed air guide member 8 arranged in sequence from top to bottom. The first air guide member 6 is arranged obliquely relative to the operating room 11. The top of the first air guide member 6 is close to the upper air inlet device 3 and the bottom is arranged away from the glass window 112. The second air guide member 7 is arranged obliquely relative to the operating room 11 and the distance between the top of the second air guide member 7 and the rear inner wall of the operating room 11 is smaller than the distance between the bottom of the second air guide member 7 and the rear inner wall of the operating room 11. The fixed air guide member 8 is arranged vertically in the operating room 11, and the distance between the fixed air guide member 8 and the rear inner wall of the operating room 11 is smaller than the distance between the bottom of the second air guide member 7 and the rear inner wall of the operating room 11. A balanced air pressure environment of the air inlet 2 and the exhaust 5 is formed in the operating room 11. During the experimental operation, air is supplied from the top and the front side wall, and the harmful substances produced by the experiment are led out of the operating room 11 by the exhaust 5. The air supply and exhaust operations do not interfere with each other, and the air flow is smoother and gentler through the arrangement of multiple guide members, which can run smoothly and flow smoothly, avoid air flow collision and reduce the generation of turbulence, and also avoid the overflow of harmful gases, so that the wind speed in the operating room 11 is more uniform, ensuring the safety of the experimenters.
[0037] like Figure 2 and Figure 3As shown, the upper air inlet device 3 includes a partition plate 31, an upper lining plate 32 and an upper guide plate 33. The partition plate 31 and the upper lining plate 32 are integrally connected. The partition plate 31 extends vertically below the top of the operating room 11 and is parallel to the front side of the operating room 11. The partition plate 31 and the upper lining plate 32 are perpendicular to each other and are arranged on the side close to the glass window 112. The upper guide plate 33 is hingedly provided at one end of the upper lining plate 32 away from the partition plate 31. The upper guide plate 33 is vertically arranged in the operating room 11 and leaves a gap with the front side of the operating room 11. The upper air inlet device 3 guides the supplementary air flow into the operating room 11. The air flow is evenly dispersed through the guiding operation of the upper guide plate 33 to avoid the situation where the air supply position does not pass through the air. The setting of the upper air inlet device 3 also prevents the gas in the operating room 11 from scattering and overflowing near the glass window 112, affecting the safety of the experimenter. The setting of the upper guide plate 33 effectively improves the utilization rate of the supplementary air flow and can fully introduce it into the bottom of the operating room 11, so that the harmful substances can be completely sucked out from the bottom of the exhaust part 5.
[0038] The left and right side walls opposite to the upper guide plate 33 are slidably connected to the inner wall of the operating room 11. The two side walls opposite to the upper guide plate 33 are provided with arc-shaped rotation grooves 331. The inner wall of the operating room 11 is provided with arc-shaped rotation bars 114 corresponding to the rotation grooves 331. A handle 332 is provided at the bottom of the upper guide plate 33 along the length direction. The gap between the upper guide plate 33 and the front side wall of the operating room 11 is adjustable, so that the size of the air outlet can be controlled. The air supply range can be manually operated according to the experimental content, and the adjustment operation is convenient; it prevents the air supply airflow from forming turbulence on the upper part of the glass window 112 and affecting other guide structures.
[0039] like Figure 2 , Figure 3 and Figure 4 As shown, each side air supply device 4 includes an air supply frame 41, an air supply plate 42 and a toggle plate 43. The air supply frame 41 is arranged along the height of the operating room 11 and is arranged at a corner of the operating room 11. The two side walls of the air supply frame 41 adjacent to the operating room 11 (i.e., the right angles on the front side of the operating room 11) constitute an air supply groove 411. The air supply frame 41 is provided with an air supply port 412 along its length direction. The air supply port 412 is arranged close to the bottom of the air supply frame 41 and its length is less than half of the length of the air supply frame 41. The air supply plate 42 is positioned and rotatably installed in the air supply groove 411 and the rotation axis is perpendicular to the bottom surface of the operating room 11. The toggle plate 43 is fixed on the air supply plate 42 and extends perpendicularly to the side wall of the air supply plate 42 to the side close to the glass window 112. The side air supply device 4 supplies air to the operating room 11 through the air supply port 412 on the air supply frame 41. The air supply port 412 is arranged near the inner side of the operating room 11 to reduce the problem of air leakage. The toggle plate 43 can adjust the size of the air supply port 412, thereby adjusting the side air supply volume. The side air supply structure can be closed when necessary.
[0040] like Figure 2 and Figure 3 As shown, the top of the first guide member 6 is hinged to the bottom of the partition plate 31, and the hinge axis is set on the side of the partition plate 31 away from the upper lining plate 32. The first guide member 6 includes a first guide plate 61, a first adjustment 62 and a first limit member 63. The first adjustment 62 is set at two opposite ends of the top of the first guide plate 61. The first adjustment 62 includes a driving gear 621 and a driven gear 622 that are meshed with each other. The driving gear 621 is set above the driven gear 622, and the driven gear 622 is sleeved on the hinge axis at the top of the first guide plate 61. The first limit member 63 is set on two opposite sides of the bottom of the first guide plate 61. The first limit member 63 includes a first limit column 631 and an arc-shaped limit groove 632 opened on the inner wall of the operating room 11. The driving gear 621 rotates to drive the driven gear 622 to rotate, thereby controlling the first guide plate 61 coaxial with the driven gear 622 to swing, driving the first guide plate 61 to adjust the ventilation gap at the bottom, controlling the size of the exhaust gap there, and thus controlling the exhaust force there.
[0041] The second air guide member 7 is arranged on a side of the first air guide member 6 away from the air inlet member 2 and the top height of the second air guide member 7 is higher than the bottom height of the first air guide member 6. The second air guide member 7 includes a second air guide plate 71 and a second adjustment 72. The second adjustment 72 is ball-jointed with the second air guide plate 71 and is arranged at the four corners of the second air guide plate 71 near the rear side. The second adjustment 72 includes two upper adjustment members 721 and two lower adjustment members 722. The upper adjustment members 721 and the lower adjustment members 722 have the same structure and the length of the upper adjustment members 721 is less than the length of the lower adjustment members 722. The upper adjustment members 721 and the lower adjustment members 722 both include an adjustment rod 7221 and an adjustment seat 7222. The adjustment rod 7221 is threadedly installed in the adjustment seat 7222, and the axis of the adjustment rod 7221 is arranged perpendicular to the front side of the operating room 11. The adjustment rod 7221 rotates to drive the adjustment seat 7222 to slide. The adjustment seat 7222 is provided with limit strips at the top and bottom. The limit strips are fixed on the inner wall of the operating room 11. Now the adjustment seat 7222 can only slide forward and backward. The upper adjustment member 721 and the lower adjustment member 722 are controlled separately. The upper and lower positions are adjusted accordingly according to the needs to control the ventilation gap of the second guide plate 71 and adjust the exhaust force.
[0042] The fixed guide member 8 is arranged on the side of the second guide member 7 away from the air inlet member 2 and the top height of the fixed guide member 8 is higher than the bottom height of the second guide member 7. The fixed guide member 8 includes a fixed guide plate 81 and a plurality of fixing bolts 82. The fixed guide plate 81 is provided with a plurality of guide holes 811. The fixing bolts 82 pass through the fixed guide plate 81 and are fixed to the inner wall of the operating room 11. A buffer plate 812 is also extended upward from the end of the fixed guide plate 81. The buffer plate 812 is arranged obliquely with the fixed guide plate 81. A C-shaped protective cover 821 is sleeved on the fixed bolt 82, and the opening of the protective cover 821 is arranged upward. The guide holes 811 conform to the aerodynamic design and are irregularly arranged, which can reduce the average surface wind speed required for containment, reduce the resistance of the airflow entering the fixed guide plate 81, enhance the containment ability of the fixed guide plate 81, and reduce turbulence and reduce the overflow of toxic and harmful gases. The buffer plate 812 is beneficial to improving the guide effect and making the airflow pass smoothly and stably; a protective cover 821 is provided to protect the fixing bolt 82 to prevent the fixing bolt 82 from being corroded by harmful substances and causing breakage and the fixed guide plate 81 to fall off, thereby ensuring the safety of the experimental operation and improving the stability of the fixing parts.
[0043] The working principle and use method of the auxiliary guide device of the fume hood: a balanced air pressure environment of the air inlet 2 and the exhaust part 5 is formed in the operating room 11. During the experimental operation, air is supplied from the top and the front side wall. The upper air inlet device 3 on the top can manually adjust the upper guide plate 33 to control the size of the upper supply air. The side wall supply air can be controlled by adjusting the toggle plate 43 to drive the air supply plate 42 to rotate to control the air outlet 412. The harmful substances generated by the experiment are led out by the exhaust part 5 through the fixed guide part 8, the second guide part 7 and the first guide part 6. The guide gaps of different heights formed between the fixed guide part 8, the second guide part 7 and the first guide part 6 can also lead out the gases at different heights in the operating room 11 inside the fume hood. The gases at different heights smoothly enter the exhaust gap in a unidirectional horizontal flow manner to ensure smooth exhaust.
[0044] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. An auxiliary flow guide device for a fume hood, comprising a cabinet body (1), wherein the cabinet body (1) comprises an operating room (11) and a compartment (12), wherein the compartment (12) is arranged below the operating room (11), an operating opening (111) is provided on the front side of the operating room (11), and a glass window (112) is provided on the operating opening (111), wherein: Also includes: An air inlet member (2), the air inlet member (2) being arranged on a side of the operating room (11) close to the glass window (112), the air inlet member (2) comprising an upper air inlet device (3) and two side air supply devices (4), the upper air inlet device (3) being arranged on the top of the operating room (11) and connected to an air supply fan (113) arranged on the top outside the operating room (11), the side air supply devices (4) being arranged on two opposite sides of the operating room (11) close to the glass window (112), and the tops of the side air supply devices (4) being also connected to the air supply fan (113); An air extraction member (5), the air extraction member (5) being arranged on a side of the operating room (11) away from the glass window (112), the air extraction member (5) comprising a first air guide member (6), a second air guide member (7) and a fixed air guide member (8) which are arranged in sequence from top to bottom, the first air guide member (6) being arranged obliquely relative to the operating room (11), the top of the first air guide member (6) being close to the upper air inlet device (3) and the bottom being arranged away from the glass window (112), the second air guide member (7) being arranged obliquely relative to the operating room (11) and the distance between the top of the second air guide member (7) and the rear inner wall of the operating room (11) being smaller than the distance between the bottom of the second air guide member (7) and the rear inner wall of the operating room (11), the fixed air guide member (8) being arranged vertically in the operating room (11), the distance between the fixed air guide member (8) and the rear inner wall of the operating room (11) being smaller than the distance between the bottom of the second air guide member (7) and the rear inner wall of the operating room (11).
2. The auxiliary flow guide device for a fume hood according to claim 1, characterized in that: The upper air inlet device (3) comprises a partition plate (31), an upper lining plate (32) and an upper guide plate (33); the partition plate (31) and the upper lining plate (32) are integrally connected; the partition plate (31) is vertically extended and arranged below the top of the operating room (11) and is parallel to the front side of the operating room (11); the partition plate (31) and the upper lining plate (32) are arranged perpendicular to each other and are arranged on a side close to the glass window (112); an upper guide plate (33) is hingedly arranged at one end of the upper lining plate (32) away from the partition plate (31); the upper guide plate (33) is vertically arranged in the operating room (11) and leaves a gap with the front inner side of the operating room (11).
3. The auxiliary flow guide device for a fume hood according to claim 2, characterized in that: The two opposite side walls at the bottom of the upper guide plate (33) are slidably connected to the inner wall of the operating chamber (11); the two opposite side walls of the upper guide plate (33) are provided with arc-shaped rotating grooves (331); the inner wall of the operating chamber (11) is provided with an arc-shaped rotating bar (114) corresponding to the rotating groove (331); and a handle (332) is provided at the bottom of the upper guide plate (33) along the length direction.
4. The auxiliary flow guide device for a fume hood according to claim 1, characterized in that: Each of the side air supply devices (4) comprises an air supply frame (41), an air supply plate (42) and a toggle plate (43); the air supply frame (41) is arranged along the height of the operating room (11) and is arranged at a corner of the operating room (11); the two side walls of the air supply frame (41) and the operating room (11) adjacent to each other form an air supply groove (411); the air supply frame (41) is provided with an air supply port (412) along its length direction; the air supply port (412) is arranged close to the bottom of the air supply frame (41) and has a length less than half of the length of the air supply frame (41); the air supply plate (42) is positioned and rotatably installed in the air supply groove (411) and the rotation axis is perpendicular to the inner bottom surface of the operating room (11); the toggle plate (43) is extended and fixed on the bottom of the air supply plate (42) and extends to a side close to the glass window (112).
5. The auxiliary flow guide device for a fume hood according to claim 2, characterized in that: The top of the first guide member (6) is hingedly connected to the bottom of the partition plate (31), and the hinge shaft is arranged on the side of the partition plate (31) away from the upper lining plate (32). The first guide member (6) comprises a first guide plate (61), a first adjustment member (62) and a first limit member (63). The first adjustment member (62) is arranged at two opposite ends of the top of the first guide plate (61). The first adjustment member (62) comprises a driving gear (621) and a driven gear (622) meshing with each other. The driving gear (621) is arranged above the driven gear (622), and the driven gear (622) is sleeved on the hinge shaft at the top of the first guide plate (61). The first limit member (63) is arranged at two opposite sides of the bottom of the first guide plate (61). The first limit member (63) comprises a first limit column (631) and an arc-shaped limit groove (632) opened on the inner wall of the operating room (11).
6. The auxiliary flow guide device for a fume hood according to claim 5, characterized in that: The second air guide (7) is arranged on a side of the first air guide (6) away from the upper air inlet device (3), and the top height of the second air guide (7) is higher than the bottom height of the first air guide (6). The second air guide (7) comprises a second air guide plate (71) and a second adjustment (72). The second adjustment (72) is connected to the second air guide plate (71) by a ball joint and is arranged at the rear side of the second air guide plate (71) near the four corners. The second adjustment (72) comprises two upper adjustment members (721) and two lower adjustment members (722). The upper adjusting member (721) and the lower adjusting member (722) have the same structure and the length of the upper adjusting member (721) is less than that of the lower adjusting member (722). The upper adjusting member (721) and the lower adjusting member (722) both include an adjusting rod (7221) and an adjusting seat (7222). The adjusting rod (7221) is threadedly installed in the adjusting seat (7222). The axis of the adjusting rod (7221) is arranged perpendicular to the rear side of the operating room (11).
7. The auxiliary flow guide device for a fume hood according to claim 6, characterized in that: The fixed air guide member (8) is arranged on a side of the second air guide member (7) away from the upper air inlet device (3), and the top height of the fixed air guide member (8) is higher than the bottom height of the second air guide member (7). The fixed air guide member (8) comprises a fixed air guide plate (81) and a plurality of fixing bolts (82). The fixed air guide plate (81) is provided with a plurality of air guide holes (811). The fixing bolts (82) pass through the fixed air guide plate (81) and are fixed to the inner wall of the operating room (11).
8. The auxiliary flow guide device for a fume hood according to claim 7, characterized in that: A buffer plate (812) is further extended upward from the end of the fixed guide plate (81), and the buffer plate (812) is arranged obliquely with the fixed guide plate (81). A C-shaped protective sleeve (821) is sleeved on the fixing bolt (82), and the opening of the protective sleeve (821) is arranged upward.